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1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 1999 - 2018 Intel Corporation. */
3
4/******************************************************************************
5 Copyright (c)2006 - 2007 Myricom, Inc. for some LRO specific code
6******************************************************************************/
7
8#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9
10#include <linux/types.h>
11#include <linux/bitops.h>
12#include <linux/module.h>
13#include <linux/pci.h>
14#include <linux/netdevice.h>
15#include <linux/vmalloc.h>
16#include <linux/string.h>
17#include <linux/in.h>
18#include <linux/ip.h>
19#include <linux/tcp.h>
20#include <linux/sctp.h>
21#include <linux/ipv6.h>
22#include <linux/slab.h>
23#include <net/checksum.h>
24#include <net/ip6_checksum.h>
25#include <linux/ethtool.h>
26#include <linux/if.h>
27#include <linux/if_vlan.h>
28#include <linux/prefetch.h>
29#include <net/mpls.h>
30#include <linux/bpf.h>
31#include <linux/bpf_trace.h>
32#include <linux/atomic.h>
33#include <net/xfrm.h>
34
35#include "ixgbevf.h"
36
37const char ixgbevf_driver_name[] = "ixgbevf";
38static const char ixgbevf_driver_string[] =
39 "Intel(R) 10 Gigabit PCI Express Virtual Function Network Driver";
40
41static char ixgbevf_copyright[] =
42 "Copyright (c) 2009 - 2018 Intel Corporation.";
43
44static const struct ixgbevf_info *ixgbevf_info_tbl[] = {
45 [board_82599_vf] = &ixgbevf_82599_vf_info,
46 [board_82599_vf_hv] = &ixgbevf_82599_vf_hv_info,
47 [board_X540_vf] = &ixgbevf_X540_vf_info,
48 [board_X540_vf_hv] = &ixgbevf_X540_vf_hv_info,
49 [board_X550_vf] = &ixgbevf_X550_vf_info,
50 [board_X550_vf_hv] = &ixgbevf_X550_vf_hv_info,
51 [board_X550EM_x_vf] = &ixgbevf_X550EM_x_vf_info,
52 [board_X550EM_x_vf_hv] = &ixgbevf_X550EM_x_vf_hv_info,
53 [board_x550em_a_vf] = &ixgbevf_x550em_a_vf_info,
54};
55
56/* ixgbevf_pci_tbl - PCI Device ID Table
57 *
58 * Wildcard entries (PCI_ANY_ID) should come last
59 * Last entry must be all 0s
60 *
61 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
62 * Class, Class Mask, private data (not used) }
63 */
64static const struct pci_device_id ixgbevf_pci_tbl[] = {
65 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF), board_82599_vf },
66 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF_HV), board_82599_vf_hv },
67 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF), board_X540_vf },
68 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF_HV), board_X540_vf_hv },
69 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550_VF), board_X550_vf },
70 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550_VF_HV), board_X550_vf_hv },
71 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_VF), board_X550EM_x_vf },
72 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_VF_HV), board_X550EM_x_vf_hv},
73 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_VF), board_x550em_a_vf },
74 /* required last entry */
75 {0, }
76};
77MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl);
78
79MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
80MODULE_DESCRIPTION("Intel(R) 10 Gigabit Virtual Function Network Driver");
81MODULE_LICENSE("GPL v2");
82
83#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
84static int debug = -1;
85module_param(debug, int, 0);
86MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
87
88static struct workqueue_struct *ixgbevf_wq;
89
90static void ixgbevf_service_event_schedule(struct ixgbevf_adapter *adapter)
91{
92 if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&
93 !test_bit(__IXGBEVF_REMOVING, &adapter->state) &&
94 !test_and_set_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state))
95 queue_work(ixgbevf_wq, &adapter->service_task);
96}
97
98static void ixgbevf_service_event_complete(struct ixgbevf_adapter *adapter)
99{
100 BUG_ON(!test_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state));
101
102 /* flush memory to make sure state is correct before next watchdog */
103 smp_mb__before_atomic();
104 clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state);
105}
106
107/* forward decls */
108static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter);
109static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector);
110static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter);
111static bool ixgbevf_can_reuse_rx_page(struct ixgbevf_rx_buffer *rx_buffer);
112static void ixgbevf_reuse_rx_page(struct ixgbevf_ring *rx_ring,
113 struct ixgbevf_rx_buffer *old_buff);
114
115static void ixgbevf_remove_adapter(struct ixgbe_hw *hw)
116{
117 struct ixgbevf_adapter *adapter = hw->back;
118
119 if (!hw->hw_addr)
120 return;
121 hw->hw_addr = NULL;
122 dev_err(&adapter->pdev->dev, "Adapter removed\n");
123 if (test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state))
124 ixgbevf_service_event_schedule(adapter);
125}
126
127static void ixgbevf_check_remove(struct ixgbe_hw *hw, u32 reg)
128{
129 u32 value;
130
131 /* The following check not only optimizes a bit by not
132 * performing a read on the status register when the
133 * register just read was a status register read that
134 * returned IXGBE_FAILED_READ_REG. It also blocks any
135 * potential recursion.
136 */
137 if (reg == IXGBE_VFSTATUS) {
138 ixgbevf_remove_adapter(hw);
139 return;
140 }
141 value = ixgbevf_read_reg(hw, IXGBE_VFSTATUS);
142 if (value == IXGBE_FAILED_READ_REG)
143 ixgbevf_remove_adapter(hw);
144}
145
146u32 ixgbevf_read_reg(struct ixgbe_hw *hw, u32 reg)
147{
148 u8 __iomem *reg_addr = READ_ONCE(hw->hw_addr);
149 u32 value;
150
151 if (IXGBE_REMOVED(reg_addr))
152 return IXGBE_FAILED_READ_REG;
153 value = readl(reg_addr + reg);
154 if (unlikely(value == IXGBE_FAILED_READ_REG))
155 ixgbevf_check_remove(hw, reg);
156 return value;
157}
158
159/**
160 * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors
161 * @adapter: pointer to adapter struct
162 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
163 * @queue: queue to map the corresponding interrupt to
164 * @msix_vector: the vector to map to the corresponding queue
165 **/
166static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction,
167 u8 queue, u8 msix_vector)
168{
169 u32 ivar, index;
170 struct ixgbe_hw *hw = &adapter->hw;
171
172 if (direction == -1) {
173 /* other causes */
174 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
175 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC);
176 ivar &= ~0xFF;
177 ivar |= msix_vector;
178 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar);
179 } else {
180 /* Tx or Rx causes */
181 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
182 index = ((16 * (queue & 1)) + (8 * direction));
183 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1));
184 ivar &= ~(0xFF << index);
185 ivar |= (msix_vector << index);
186 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar);
187 }
188}
189
190static u64 ixgbevf_get_tx_completed(struct ixgbevf_ring *ring)
191{
192 return ring->stats.packets;
193}
194
195static u32 ixgbevf_get_tx_pending(struct ixgbevf_ring *ring)
196{
197 struct ixgbevf_adapter *adapter = netdev_priv(ring->netdev);
198 struct ixgbe_hw *hw = &adapter->hw;
199
200 u32 head = IXGBE_READ_REG(hw, IXGBE_VFTDH(ring->reg_idx));
201 u32 tail = IXGBE_READ_REG(hw, IXGBE_VFTDT(ring->reg_idx));
202
203 if (head != tail)
204 return (head < tail) ?
205 tail - head : (tail + ring->count - head);
206
207 return 0;
208}
209
210static inline bool ixgbevf_check_tx_hang(struct ixgbevf_ring *tx_ring)
211{
212 u32 tx_done = ixgbevf_get_tx_completed(tx_ring);
213 u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
214 u32 tx_pending = ixgbevf_get_tx_pending(tx_ring);
215
216 clear_check_for_tx_hang(tx_ring);
217
218 /* Check for a hung queue, but be thorough. This verifies
219 * that a transmit has been completed since the previous
220 * check AND there is at least one packet pending. The
221 * ARMED bit is set to indicate a potential hang.
222 */
223 if ((tx_done_old == tx_done) && tx_pending) {
224 /* make sure it is true for two checks in a row */
225 return test_and_set_bit(__IXGBEVF_HANG_CHECK_ARMED,
226 &tx_ring->state);
227 }
228 /* reset the countdown */
229 clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &tx_ring->state);
230
231 /* update completed stats and continue */
232 tx_ring->tx_stats.tx_done_old = tx_done;
233
234 return false;
235}
236
237static void ixgbevf_tx_timeout_reset(struct ixgbevf_adapter *adapter)
238{
239 /* Do the reset outside of interrupt context */
240 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) {
241 set_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state);
242 ixgbevf_service_event_schedule(adapter);
243 }
244}
245
246/**
247 * ixgbevf_tx_timeout - Respond to a Tx Hang
248 * @netdev: network interface device structure
249 * @txqueue: transmit queue hanging (unused)
250 **/
251static void ixgbevf_tx_timeout(struct net_device *netdev, unsigned int __always_unused txqueue)
252{
253 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
254
255 ixgbevf_tx_timeout_reset(adapter);
256}
257
258/**
259 * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes
260 * @q_vector: board private structure
261 * @tx_ring: tx ring to clean
262 * @napi_budget: Used to determine if we are in netpoll
263 **/
264static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector,
265 struct ixgbevf_ring *tx_ring, int napi_budget)
266{
267 struct ixgbevf_adapter *adapter = q_vector->adapter;
268 struct ixgbevf_tx_buffer *tx_buffer;
269 union ixgbe_adv_tx_desc *tx_desc;
270 unsigned int total_bytes = 0, total_packets = 0, total_ipsec = 0;
271 unsigned int budget = tx_ring->count / 2;
272 unsigned int i = tx_ring->next_to_clean;
273
274 if (test_bit(__IXGBEVF_DOWN, &adapter->state))
275 return true;
276
277 tx_buffer = &tx_ring->tx_buffer_info[i];
278 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
279 i -= tx_ring->count;
280
281 do {
282 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
283
284 /* if next_to_watch is not set then there is no work pending */
285 if (!eop_desc)
286 break;
287
288 /* prevent any other reads prior to eop_desc */
289 smp_rmb();
290
291 /* if DD is not set pending work has not been completed */
292 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
293 break;
294
295 /* clear next_to_watch to prevent false hangs */
296 tx_buffer->next_to_watch = NULL;
297
298 /* update the statistics for this packet */
299 total_bytes += tx_buffer->bytecount;
300 total_packets += tx_buffer->gso_segs;
301 if (tx_buffer->tx_flags & IXGBE_TX_FLAGS_IPSEC)
302 total_ipsec++;
303
304 /* free the skb */
305 if (ring_is_xdp(tx_ring))
306 page_frag_free(tx_buffer->data);
307 else
308 napi_consume_skb(tx_buffer->skb, napi_budget);
309
310 /* unmap skb header data */
311 dma_unmap_single(tx_ring->dev,
312 dma_unmap_addr(tx_buffer, dma),
313 dma_unmap_len(tx_buffer, len),
314 DMA_TO_DEVICE);
315
316 /* clear tx_buffer data */
317 dma_unmap_len_set(tx_buffer, len, 0);
318
319 /* unmap remaining buffers */
320 while (tx_desc != eop_desc) {
321 tx_buffer++;
322 tx_desc++;
323 i++;
324 if (unlikely(!i)) {
325 i -= tx_ring->count;
326 tx_buffer = tx_ring->tx_buffer_info;
327 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
328 }
329
330 /* unmap any remaining paged data */
331 if (dma_unmap_len(tx_buffer, len)) {
332 dma_unmap_page(tx_ring->dev,
333 dma_unmap_addr(tx_buffer, dma),
334 dma_unmap_len(tx_buffer, len),
335 DMA_TO_DEVICE);
336 dma_unmap_len_set(tx_buffer, len, 0);
337 }
338 }
339
340 /* move us one more past the eop_desc for start of next pkt */
341 tx_buffer++;
342 tx_desc++;
343 i++;
344 if (unlikely(!i)) {
345 i -= tx_ring->count;
346 tx_buffer = tx_ring->tx_buffer_info;
347 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
348 }
349
350 /* issue prefetch for next Tx descriptor */
351 prefetch(tx_desc);
352
353 /* update budget accounting */
354 budget--;
355 } while (likely(budget));
356
357 i += tx_ring->count;
358 tx_ring->next_to_clean = i;
359 u64_stats_update_begin(&tx_ring->syncp);
360 tx_ring->stats.bytes += total_bytes;
361 tx_ring->stats.packets += total_packets;
362 u64_stats_update_end(&tx_ring->syncp);
363 q_vector->tx.total_bytes += total_bytes;
364 q_vector->tx.total_packets += total_packets;
365 adapter->tx_ipsec += total_ipsec;
366
367 if (check_for_tx_hang(tx_ring) && ixgbevf_check_tx_hang(tx_ring)) {
368 struct ixgbe_hw *hw = &adapter->hw;
369 union ixgbe_adv_tx_desc *eop_desc;
370
371 eop_desc = tx_ring->tx_buffer_info[i].next_to_watch;
372
373 pr_err("Detected Tx Unit Hang%s\n"
374 " Tx Queue <%d>\n"
375 " TDH, TDT <%x>, <%x>\n"
376 " next_to_use <%x>\n"
377 " next_to_clean <%x>\n"
378 "tx_buffer_info[next_to_clean]\n"
379 " next_to_watch <%p>\n"
380 " eop_desc->wb.status <%x>\n"
381 " time_stamp <%lx>\n"
382 " jiffies <%lx>\n",
383 ring_is_xdp(tx_ring) ? " XDP" : "",
384 tx_ring->queue_index,
385 IXGBE_READ_REG(hw, IXGBE_VFTDH(tx_ring->reg_idx)),
386 IXGBE_READ_REG(hw, IXGBE_VFTDT(tx_ring->reg_idx)),
387 tx_ring->next_to_use, i,
388 eop_desc, (eop_desc ? eop_desc->wb.status : 0),
389 tx_ring->tx_buffer_info[i].time_stamp, jiffies);
390
391 if (!ring_is_xdp(tx_ring))
392 netif_stop_subqueue(tx_ring->netdev,
393 tx_ring->queue_index);
394
395 /* schedule immediate reset if we believe we hung */
396 ixgbevf_tx_timeout_reset(adapter);
397
398 return true;
399 }
400
401 if (ring_is_xdp(tx_ring))
402 return !!budget;
403
404#define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
405 if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
406 (ixgbevf_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
407 /* Make sure that anybody stopping the queue after this
408 * sees the new next_to_clean.
409 */
410 smp_mb();
411
412 if (__netif_subqueue_stopped(tx_ring->netdev,
413 tx_ring->queue_index) &&
414 !test_bit(__IXGBEVF_DOWN, &adapter->state)) {
415 netif_wake_subqueue(tx_ring->netdev,
416 tx_ring->queue_index);
417 ++tx_ring->tx_stats.restart_queue;
418 }
419 }
420
421 return !!budget;
422}
423
424/**
425 * ixgbevf_rx_skb - Helper function to determine proper Rx method
426 * @q_vector: structure containing interrupt and ring information
427 * @skb: packet to send up
428 **/
429static void ixgbevf_rx_skb(struct ixgbevf_q_vector *q_vector,
430 struct sk_buff *skb)
431{
432 napi_gro_receive(&q_vector->napi, skb);
433}
434
435#define IXGBE_RSS_L4_TYPES_MASK \
436 ((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \
437 (1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \
438 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \
439 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP))
440
441static inline void ixgbevf_rx_hash(struct ixgbevf_ring *ring,
442 union ixgbe_adv_rx_desc *rx_desc,
443 struct sk_buff *skb)
444{
445 u16 rss_type;
446
447 if (!(ring->netdev->features & NETIF_F_RXHASH))
448 return;
449
450 rss_type = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.pkt_info) &
451 IXGBE_RXDADV_RSSTYPE_MASK;
452
453 if (!rss_type)
454 return;
455
456 skb_set_hash(skb, le32_to_cpu(rx_desc->wb.lower.hi_dword.rss),
457 (IXGBE_RSS_L4_TYPES_MASK & (1ul << rss_type)) ?
458 PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
459}
460
461/**
462 * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
463 * @ring: structure containig ring specific data
464 * @rx_desc: current Rx descriptor being processed
465 * @skb: skb currently being received and modified
466 **/
467static inline void ixgbevf_rx_checksum(struct ixgbevf_ring *ring,
468 union ixgbe_adv_rx_desc *rx_desc,
469 struct sk_buff *skb)
470{
471 skb_checksum_none_assert(skb);
472
473 /* Rx csum disabled */
474 if (!(ring->netdev->features & NETIF_F_RXCSUM))
475 return;
476
477 /* if IP and error */
478 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) &&
479 ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) {
480 ring->rx_stats.csum_err++;
481 return;
482 }
483
484 if (!ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS))
485 return;
486
487 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) {
488 ring->rx_stats.csum_err++;
489 return;
490 }
491
492 /* It must be a TCP or UDP packet with a valid checksum */
493 skb->ip_summed = CHECKSUM_UNNECESSARY;
494}
495
496/**
497 * ixgbevf_process_skb_fields - Populate skb header fields from Rx descriptor
498 * @rx_ring: rx descriptor ring packet is being transacted on
499 * @rx_desc: pointer to the EOP Rx descriptor
500 * @skb: pointer to current skb being populated
501 *
502 * This function checks the ring, descriptor, and packet information in
503 * order to populate the checksum, VLAN, protocol, and other fields within
504 * the skb.
505 **/
506static void ixgbevf_process_skb_fields(struct ixgbevf_ring *rx_ring,
507 union ixgbe_adv_rx_desc *rx_desc,
508 struct sk_buff *skb)
509{
510 ixgbevf_rx_hash(rx_ring, rx_desc, skb);
511 ixgbevf_rx_checksum(rx_ring, rx_desc, skb);
512
513 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) {
514 u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan);
515 unsigned long *active_vlans = netdev_priv(rx_ring->netdev);
516
517 if (test_bit(vid & VLAN_VID_MASK, active_vlans))
518 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
519 }
520
521 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_STAT_SECP))
522 ixgbevf_ipsec_rx(rx_ring, rx_desc, skb);
523
524 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
525}
526
527static
528struct ixgbevf_rx_buffer *ixgbevf_get_rx_buffer(struct ixgbevf_ring *rx_ring,
529 const unsigned int size)
530{
531 struct ixgbevf_rx_buffer *rx_buffer;
532
533 rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
534 prefetchw(rx_buffer->page);
535
536 /* we are reusing so sync this buffer for CPU use */
537 dma_sync_single_range_for_cpu(rx_ring->dev,
538 rx_buffer->dma,
539 rx_buffer->page_offset,
540 size,
541 DMA_FROM_DEVICE);
542
543 rx_buffer->pagecnt_bias--;
544
545 return rx_buffer;
546}
547
548static void ixgbevf_put_rx_buffer(struct ixgbevf_ring *rx_ring,
549 struct ixgbevf_rx_buffer *rx_buffer,
550 struct sk_buff *skb)
551{
552 if (ixgbevf_can_reuse_rx_page(rx_buffer)) {
553 /* hand second half of page back to the ring */
554 ixgbevf_reuse_rx_page(rx_ring, rx_buffer);
555 } else {
556 if (IS_ERR(skb))
557 /* We are not reusing the buffer so unmap it and free
558 * any references we are holding to it
559 */
560 dma_unmap_page_attrs(rx_ring->dev, rx_buffer->dma,
561 ixgbevf_rx_pg_size(rx_ring),
562 DMA_FROM_DEVICE,
563 IXGBEVF_RX_DMA_ATTR);
564 __page_frag_cache_drain(rx_buffer->page,
565 rx_buffer->pagecnt_bias);
566 }
567
568 /* clear contents of rx_buffer */
569 rx_buffer->page = NULL;
570}
571
572/**
573 * ixgbevf_is_non_eop - process handling of non-EOP buffers
574 * @rx_ring: Rx ring being processed
575 * @rx_desc: Rx descriptor for current buffer
576 *
577 * This function updates next to clean. If the buffer is an EOP buffer
578 * this function exits returning false, otherwise it will place the
579 * sk_buff in the next buffer to be chained and return true indicating
580 * that this is in fact a non-EOP buffer.
581 **/
582static bool ixgbevf_is_non_eop(struct ixgbevf_ring *rx_ring,
583 union ixgbe_adv_rx_desc *rx_desc)
584{
585 u32 ntc = rx_ring->next_to_clean + 1;
586
587 /* fetch, update, and store next to clean */
588 ntc = (ntc < rx_ring->count) ? ntc : 0;
589 rx_ring->next_to_clean = ntc;
590
591 prefetch(IXGBEVF_RX_DESC(rx_ring, ntc));
592
593 if (likely(ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
594 return false;
595
596 return true;
597}
598
599static inline unsigned int ixgbevf_rx_offset(struct ixgbevf_ring *rx_ring)
600{
601 return ring_uses_build_skb(rx_ring) ? IXGBEVF_SKB_PAD : 0;
602}
603
604static bool ixgbevf_alloc_mapped_page(struct ixgbevf_ring *rx_ring,
605 struct ixgbevf_rx_buffer *bi)
606{
607 struct page *page = bi->page;
608 dma_addr_t dma;
609
610 /* since we are recycling buffers we should seldom need to alloc */
611 if (likely(page))
612 return true;
613
614 /* alloc new page for storage */
615 page = dev_alloc_pages(ixgbevf_rx_pg_order(rx_ring));
616 if (unlikely(!page)) {
617 rx_ring->rx_stats.alloc_rx_page_failed++;
618 return false;
619 }
620
621 /* map page for use */
622 dma = dma_map_page_attrs(rx_ring->dev, page, 0,
623 ixgbevf_rx_pg_size(rx_ring),
624 DMA_FROM_DEVICE, IXGBEVF_RX_DMA_ATTR);
625
626 /* if mapping failed free memory back to system since
627 * there isn't much point in holding memory we can't use
628 */
629 if (dma_mapping_error(rx_ring->dev, dma)) {
630 __free_pages(page, ixgbevf_rx_pg_order(rx_ring));
631
632 rx_ring->rx_stats.alloc_rx_page_failed++;
633 return false;
634 }
635
636 bi->dma = dma;
637 bi->page = page;
638 bi->page_offset = ixgbevf_rx_offset(rx_ring);
639 bi->pagecnt_bias = 1;
640 rx_ring->rx_stats.alloc_rx_page++;
641
642 return true;
643}
644
645/**
646 * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
647 * @rx_ring: rx descriptor ring (for a specific queue) to setup buffers on
648 * @cleaned_count: number of buffers to replace
649 **/
650static void ixgbevf_alloc_rx_buffers(struct ixgbevf_ring *rx_ring,
651 u16 cleaned_count)
652{
653 union ixgbe_adv_rx_desc *rx_desc;
654 struct ixgbevf_rx_buffer *bi;
655 unsigned int i = rx_ring->next_to_use;
656
657 /* nothing to do or no valid netdev defined */
658 if (!cleaned_count || !rx_ring->netdev)
659 return;
660
661 rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
662 bi = &rx_ring->rx_buffer_info[i];
663 i -= rx_ring->count;
664
665 do {
666 if (!ixgbevf_alloc_mapped_page(rx_ring, bi))
667 break;
668
669 /* sync the buffer for use by the device */
670 dma_sync_single_range_for_device(rx_ring->dev, bi->dma,
671 bi->page_offset,
672 ixgbevf_rx_bufsz(rx_ring),
673 DMA_FROM_DEVICE);
674
675 /* Refresh the desc even if pkt_addr didn't change
676 * because each write-back erases this info.
677 */
678 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);
679
680 rx_desc++;
681 bi++;
682 i++;
683 if (unlikely(!i)) {
684 rx_desc = IXGBEVF_RX_DESC(rx_ring, 0);
685 bi = rx_ring->rx_buffer_info;
686 i -= rx_ring->count;
687 }
688
689 /* clear the length for the next_to_use descriptor */
690 rx_desc->wb.upper.length = 0;
691
692 cleaned_count--;
693 } while (cleaned_count);
694
695 i += rx_ring->count;
696
697 if (rx_ring->next_to_use != i) {
698 /* record the next descriptor to use */
699 rx_ring->next_to_use = i;
700
701 /* update next to alloc since we have filled the ring */
702 rx_ring->next_to_alloc = i;
703
704 /* Force memory writes to complete before letting h/w
705 * know there are new descriptors to fetch. (Only
706 * applicable for weak-ordered memory model archs,
707 * such as IA-64).
708 */
709 wmb();
710 ixgbevf_write_tail(rx_ring, i);
711 }
712}
713
714/**
715 * ixgbevf_cleanup_headers - Correct corrupted or empty headers
716 * @rx_ring: rx descriptor ring packet is being transacted on
717 * @rx_desc: pointer to the EOP Rx descriptor
718 * @skb: pointer to current skb being fixed
719 *
720 * Check for corrupted packet headers caused by senders on the local L2
721 * embedded NIC switch not setting up their Tx Descriptors right. These
722 * should be very rare.
723 *
724 * Also address the case where we are pulling data in on pages only
725 * and as such no data is present in the skb header.
726 *
727 * In addition if skb is not at least 60 bytes we need to pad it so that
728 * it is large enough to qualify as a valid Ethernet frame.
729 *
730 * Returns true if an error was encountered and skb was freed.
731 **/
732static bool ixgbevf_cleanup_headers(struct ixgbevf_ring *rx_ring,
733 union ixgbe_adv_rx_desc *rx_desc,
734 struct sk_buff *skb)
735{
736 /* XDP packets use error pointer so abort at this point */
737 if (IS_ERR(skb))
738 return true;
739
740 /* verify that the packet does not have any known errors */
741 if (unlikely(ixgbevf_test_staterr(rx_desc,
742 IXGBE_RXDADV_ERR_FRAME_ERR_MASK))) {
743 struct net_device *netdev = rx_ring->netdev;
744
745 if (!(netdev->features & NETIF_F_RXALL)) {
746 dev_kfree_skb_any(skb);
747 return true;
748 }
749 }
750
751 /* if eth_skb_pad returns an error the skb was freed */
752 if (eth_skb_pad(skb))
753 return true;
754
755 return false;
756}
757
758/**
759 * ixgbevf_reuse_rx_page - page flip buffer and store it back on the ring
760 * @rx_ring: rx descriptor ring to store buffers on
761 * @old_buff: donor buffer to have page reused
762 *
763 * Synchronizes page for reuse by the adapter
764 **/
765static void ixgbevf_reuse_rx_page(struct ixgbevf_ring *rx_ring,
766 struct ixgbevf_rx_buffer *old_buff)
767{
768 struct ixgbevf_rx_buffer *new_buff;
769 u16 nta = rx_ring->next_to_alloc;
770
771 new_buff = &rx_ring->rx_buffer_info[nta];
772
773 /* update, and store next to alloc */
774 nta++;
775 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
776
777 /* transfer page from old buffer to new buffer */
778 new_buff->page = old_buff->page;
779 new_buff->dma = old_buff->dma;
780 new_buff->page_offset = old_buff->page_offset;
781 new_buff->pagecnt_bias = old_buff->pagecnt_bias;
782}
783
784static bool ixgbevf_can_reuse_rx_page(struct ixgbevf_rx_buffer *rx_buffer)
785{
786 unsigned int pagecnt_bias = rx_buffer->pagecnt_bias;
787 struct page *page = rx_buffer->page;
788
789 /* avoid re-using remote and pfmemalloc pages */
790 if (!dev_page_is_reusable(page))
791 return false;
792
793#if (PAGE_SIZE < 8192)
794 /* if we are only owner of page we can reuse it */
795 if (unlikely((page_ref_count(page) - pagecnt_bias) > 1))
796 return false;
797#else
798#define IXGBEVF_LAST_OFFSET \
799 (SKB_WITH_OVERHEAD(PAGE_SIZE) - IXGBEVF_RXBUFFER_2048)
800
801 if (rx_buffer->page_offset > IXGBEVF_LAST_OFFSET)
802 return false;
803
804#endif
805
806 /* If we have drained the page fragment pool we need to update
807 * the pagecnt_bias and page count so that we fully restock the
808 * number of references the driver holds.
809 */
810 if (unlikely(!pagecnt_bias)) {
811 page_ref_add(page, USHRT_MAX);
812 rx_buffer->pagecnt_bias = USHRT_MAX;
813 }
814
815 return true;
816}
817
818/**
819 * ixgbevf_add_rx_frag - Add contents of Rx buffer to sk_buff
820 * @rx_ring: rx descriptor ring to transact packets on
821 * @rx_buffer: buffer containing page to add
822 * @skb: sk_buff to place the data into
823 * @size: size of buffer to be added
824 *
825 * This function will add the data contained in rx_buffer->page to the skb.
826 **/
827static void ixgbevf_add_rx_frag(struct ixgbevf_ring *rx_ring,
828 struct ixgbevf_rx_buffer *rx_buffer,
829 struct sk_buff *skb,
830 unsigned int size)
831{
832#if (PAGE_SIZE < 8192)
833 unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
834#else
835 unsigned int truesize = ring_uses_build_skb(rx_ring) ?
836 SKB_DATA_ALIGN(IXGBEVF_SKB_PAD + size) :
837 SKB_DATA_ALIGN(size);
838#endif
839 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_buffer->page,
840 rx_buffer->page_offset, size, truesize);
841#if (PAGE_SIZE < 8192)
842 rx_buffer->page_offset ^= truesize;
843#else
844 rx_buffer->page_offset += truesize;
845#endif
846}
847
848static
849struct sk_buff *ixgbevf_construct_skb(struct ixgbevf_ring *rx_ring,
850 struct ixgbevf_rx_buffer *rx_buffer,
851 struct xdp_buff *xdp,
852 union ixgbe_adv_rx_desc *rx_desc)
853{
854 unsigned int size = xdp->data_end - xdp->data;
855#if (PAGE_SIZE < 8192)
856 unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
857#else
858 unsigned int truesize = SKB_DATA_ALIGN(xdp->data_end -
859 xdp->data_hard_start);
860#endif
861 unsigned int headlen;
862 struct sk_buff *skb;
863
864 /* prefetch first cache line of first page */
865 net_prefetch(xdp->data);
866
867 /* Note, we get here by enabling legacy-rx via:
868 *
869 * ethtool --set-priv-flags <dev> legacy-rx on
870 *
871 * In this mode, we currently get 0 extra XDP headroom as
872 * opposed to having legacy-rx off, where we process XDP
873 * packets going to stack via ixgbevf_build_skb().
874 *
875 * For ixgbevf_construct_skb() mode it means that the
876 * xdp->data_meta will always point to xdp->data, since
877 * the helper cannot expand the head. Should this ever
878 * changed in future for legacy-rx mode on, then lets also
879 * add xdp->data_meta handling here.
880 */
881
882 /* allocate a skb to store the frags */
883 skb = napi_alloc_skb(&rx_ring->q_vector->napi, IXGBEVF_RX_HDR_SIZE);
884 if (unlikely(!skb))
885 return NULL;
886
887 /* Determine available headroom for copy */
888 headlen = size;
889 if (headlen > IXGBEVF_RX_HDR_SIZE)
890 headlen = eth_get_headlen(skb->dev, xdp->data,
891 IXGBEVF_RX_HDR_SIZE);
892
893 /* align pull length to size of long to optimize memcpy performance */
894 memcpy(__skb_put(skb, headlen), xdp->data,
895 ALIGN(headlen, sizeof(long)));
896
897 /* update all of the pointers */
898 size -= headlen;
899 if (size) {
900 skb_add_rx_frag(skb, 0, rx_buffer->page,
901 (xdp->data + headlen) -
902 page_address(rx_buffer->page),
903 size, truesize);
904#if (PAGE_SIZE < 8192)
905 rx_buffer->page_offset ^= truesize;
906#else
907 rx_buffer->page_offset += truesize;
908#endif
909 } else {
910 rx_buffer->pagecnt_bias++;
911 }
912
913 return skb;
914}
915
916static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter,
917 u32 qmask)
918{
919 struct ixgbe_hw *hw = &adapter->hw;
920
921 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, qmask);
922}
923
924static struct sk_buff *ixgbevf_build_skb(struct ixgbevf_ring *rx_ring,
925 struct ixgbevf_rx_buffer *rx_buffer,
926 struct xdp_buff *xdp,
927 union ixgbe_adv_rx_desc *rx_desc)
928{
929 unsigned int metasize = xdp->data - xdp->data_meta;
930#if (PAGE_SIZE < 8192)
931 unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
932#else
933 unsigned int truesize = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) +
934 SKB_DATA_ALIGN(xdp->data_end -
935 xdp->data_hard_start);
936#endif
937 struct sk_buff *skb;
938
939 /* Prefetch first cache line of first page. If xdp->data_meta
940 * is unused, this points to xdp->data, otherwise, we likely
941 * have a consumer accessing first few bytes of meta data,
942 * and then actual data.
943 */
944 net_prefetch(xdp->data_meta);
945
946 /* build an skb around the page buffer */
947 skb = napi_build_skb(xdp->data_hard_start, truesize);
948 if (unlikely(!skb))
949 return NULL;
950
951 /* update pointers within the skb to store the data */
952 skb_reserve(skb, xdp->data - xdp->data_hard_start);
953 __skb_put(skb, xdp->data_end - xdp->data);
954 if (metasize)
955 skb_metadata_set(skb, metasize);
956
957 /* update buffer offset */
958#if (PAGE_SIZE < 8192)
959 rx_buffer->page_offset ^= truesize;
960#else
961 rx_buffer->page_offset += truesize;
962#endif
963
964 return skb;
965}
966
967#define IXGBEVF_XDP_PASS 0
968#define IXGBEVF_XDP_CONSUMED 1
969#define IXGBEVF_XDP_TX 2
970
971static int ixgbevf_xmit_xdp_ring(struct ixgbevf_ring *ring,
972 struct xdp_buff *xdp)
973{
974 struct ixgbevf_tx_buffer *tx_buffer;
975 union ixgbe_adv_tx_desc *tx_desc;
976 u32 len, cmd_type;
977 dma_addr_t dma;
978 u16 i;
979
980 len = xdp->data_end - xdp->data;
981
982 if (unlikely(!ixgbevf_desc_unused(ring)))
983 return IXGBEVF_XDP_CONSUMED;
984
985 dma = dma_map_single(ring->dev, xdp->data, len, DMA_TO_DEVICE);
986 if (dma_mapping_error(ring->dev, dma))
987 return IXGBEVF_XDP_CONSUMED;
988
989 /* record the location of the first descriptor for this packet */
990 i = ring->next_to_use;
991 tx_buffer = &ring->tx_buffer_info[i];
992
993 dma_unmap_len_set(tx_buffer, len, len);
994 dma_unmap_addr_set(tx_buffer, dma, dma);
995 tx_buffer->data = xdp->data;
996 tx_buffer->bytecount = len;
997 tx_buffer->gso_segs = 1;
998 tx_buffer->protocol = 0;
999
1000 /* Populate minimal context descriptor that will provide for the
1001 * fact that we are expected to process Ethernet frames.
1002 */
1003 if (!test_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state)) {
1004 struct ixgbe_adv_tx_context_desc *context_desc;
1005
1006 set_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state);
1007
1008 context_desc = IXGBEVF_TX_CTXTDESC(ring, 0);
1009 context_desc->vlan_macip_lens =
1010 cpu_to_le32(ETH_HLEN << IXGBE_ADVTXD_MACLEN_SHIFT);
1011 context_desc->fceof_saidx = 0;
1012 context_desc->type_tucmd_mlhl =
1013 cpu_to_le32(IXGBE_TXD_CMD_DEXT |
1014 IXGBE_ADVTXD_DTYP_CTXT);
1015 context_desc->mss_l4len_idx = 0;
1016
1017 i = 1;
1018 }
1019
1020 /* put descriptor type bits */
1021 cmd_type = IXGBE_ADVTXD_DTYP_DATA |
1022 IXGBE_ADVTXD_DCMD_DEXT |
1023 IXGBE_ADVTXD_DCMD_IFCS;
1024 cmd_type |= len | IXGBE_TXD_CMD;
1025
1026 tx_desc = IXGBEVF_TX_DESC(ring, i);
1027 tx_desc->read.buffer_addr = cpu_to_le64(dma);
1028
1029 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
1030 tx_desc->read.olinfo_status =
1031 cpu_to_le32((len << IXGBE_ADVTXD_PAYLEN_SHIFT) |
1032 IXGBE_ADVTXD_CC);
1033
1034 /* Avoid any potential race with cleanup */
1035 smp_wmb();
1036
1037 /* set next_to_watch value indicating a packet is present */
1038 i++;
1039 if (i == ring->count)
1040 i = 0;
1041
1042 tx_buffer->next_to_watch = tx_desc;
1043 ring->next_to_use = i;
1044
1045 return IXGBEVF_XDP_TX;
1046}
1047
1048static struct sk_buff *ixgbevf_run_xdp(struct ixgbevf_adapter *adapter,
1049 struct ixgbevf_ring *rx_ring,
1050 struct xdp_buff *xdp)
1051{
1052 int result = IXGBEVF_XDP_PASS;
1053 struct ixgbevf_ring *xdp_ring;
1054 struct bpf_prog *xdp_prog;
1055 u32 act;
1056
1057 xdp_prog = READ_ONCE(rx_ring->xdp_prog);
1058
1059 if (!xdp_prog)
1060 goto xdp_out;
1061
1062 act = bpf_prog_run_xdp(xdp_prog, xdp);
1063 switch (act) {
1064 case XDP_PASS:
1065 break;
1066 case XDP_TX:
1067 xdp_ring = adapter->xdp_ring[rx_ring->queue_index];
1068 result = ixgbevf_xmit_xdp_ring(xdp_ring, xdp);
1069 if (result == IXGBEVF_XDP_CONSUMED)
1070 goto out_failure;
1071 break;
1072 default:
1073 bpf_warn_invalid_xdp_action(rx_ring->netdev, xdp_prog, act);
1074 fallthrough;
1075 case XDP_ABORTED:
1076out_failure:
1077 trace_xdp_exception(rx_ring->netdev, xdp_prog, act);
1078 fallthrough; /* handle aborts by dropping packet */
1079 case XDP_DROP:
1080 result = IXGBEVF_XDP_CONSUMED;
1081 break;
1082 }
1083xdp_out:
1084 return ERR_PTR(-result);
1085}
1086
1087static unsigned int ixgbevf_rx_frame_truesize(struct ixgbevf_ring *rx_ring,
1088 unsigned int size)
1089{
1090 unsigned int truesize;
1091
1092#if (PAGE_SIZE < 8192)
1093 truesize = ixgbevf_rx_pg_size(rx_ring) / 2; /* Must be power-of-2 */
1094#else
1095 truesize = ring_uses_build_skb(rx_ring) ?
1096 SKB_DATA_ALIGN(IXGBEVF_SKB_PAD + size) +
1097 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) :
1098 SKB_DATA_ALIGN(size);
1099#endif
1100 return truesize;
1101}
1102
1103static void ixgbevf_rx_buffer_flip(struct ixgbevf_ring *rx_ring,
1104 struct ixgbevf_rx_buffer *rx_buffer,
1105 unsigned int size)
1106{
1107 unsigned int truesize = ixgbevf_rx_frame_truesize(rx_ring, size);
1108
1109#if (PAGE_SIZE < 8192)
1110 rx_buffer->page_offset ^= truesize;
1111#else
1112 rx_buffer->page_offset += truesize;
1113#endif
1114}
1115
1116static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
1117 struct ixgbevf_ring *rx_ring,
1118 int budget)
1119{
1120 unsigned int total_rx_bytes = 0, total_rx_packets = 0, frame_sz = 0;
1121 struct ixgbevf_adapter *adapter = q_vector->adapter;
1122 u16 cleaned_count = ixgbevf_desc_unused(rx_ring);
1123 struct sk_buff *skb = rx_ring->skb;
1124 bool xdp_xmit = false;
1125 struct xdp_buff xdp;
1126
1127 /* Frame size depend on rx_ring setup when PAGE_SIZE=4K */
1128#if (PAGE_SIZE < 8192)
1129 frame_sz = ixgbevf_rx_frame_truesize(rx_ring, 0);
1130#endif
1131 xdp_init_buff(&xdp, frame_sz, &rx_ring->xdp_rxq);
1132
1133 while (likely(total_rx_packets < budget)) {
1134 struct ixgbevf_rx_buffer *rx_buffer;
1135 union ixgbe_adv_rx_desc *rx_desc;
1136 unsigned int size;
1137
1138 /* return some buffers to hardware, one at a time is too slow */
1139 if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) {
1140 ixgbevf_alloc_rx_buffers(rx_ring, cleaned_count);
1141 cleaned_count = 0;
1142 }
1143
1144 rx_desc = IXGBEVF_RX_DESC(rx_ring, rx_ring->next_to_clean);
1145 size = le16_to_cpu(rx_desc->wb.upper.length);
1146 if (!size)
1147 break;
1148
1149 /* This memory barrier is needed to keep us from reading
1150 * any other fields out of the rx_desc until we know the
1151 * RXD_STAT_DD bit is set
1152 */
1153 rmb();
1154
1155 rx_buffer = ixgbevf_get_rx_buffer(rx_ring, size);
1156
1157 /* retrieve a buffer from the ring */
1158 if (!skb) {
1159 unsigned int offset = ixgbevf_rx_offset(rx_ring);
1160 unsigned char *hard_start;
1161
1162 hard_start = page_address(rx_buffer->page) +
1163 rx_buffer->page_offset - offset;
1164 xdp_prepare_buff(&xdp, hard_start, offset, size, true);
1165#if (PAGE_SIZE > 4096)
1166 /* At larger PAGE_SIZE, frame_sz depend on len size */
1167 xdp.frame_sz = ixgbevf_rx_frame_truesize(rx_ring, size);
1168#endif
1169 skb = ixgbevf_run_xdp(adapter, rx_ring, &xdp);
1170 }
1171
1172 if (IS_ERR(skb)) {
1173 if (PTR_ERR(skb) == -IXGBEVF_XDP_TX) {
1174 xdp_xmit = true;
1175 ixgbevf_rx_buffer_flip(rx_ring, rx_buffer,
1176 size);
1177 } else {
1178 rx_buffer->pagecnt_bias++;
1179 }
1180 total_rx_packets++;
1181 total_rx_bytes += size;
1182 } else if (skb) {
1183 ixgbevf_add_rx_frag(rx_ring, rx_buffer, skb, size);
1184 } else if (ring_uses_build_skb(rx_ring)) {
1185 skb = ixgbevf_build_skb(rx_ring, rx_buffer,
1186 &xdp, rx_desc);
1187 } else {
1188 skb = ixgbevf_construct_skb(rx_ring, rx_buffer,
1189 &xdp, rx_desc);
1190 }
1191
1192 /* exit if we failed to retrieve a buffer */
1193 if (!skb) {
1194 rx_ring->rx_stats.alloc_rx_buff_failed++;
1195 rx_buffer->pagecnt_bias++;
1196 break;
1197 }
1198
1199 ixgbevf_put_rx_buffer(rx_ring, rx_buffer, skb);
1200 cleaned_count++;
1201
1202 /* fetch next buffer in frame if non-eop */
1203 if (ixgbevf_is_non_eop(rx_ring, rx_desc))
1204 continue;
1205
1206 /* verify the packet layout is correct */
1207 if (ixgbevf_cleanup_headers(rx_ring, rx_desc, skb)) {
1208 skb = NULL;
1209 continue;
1210 }
1211
1212 /* probably a little skewed due to removing CRC */
1213 total_rx_bytes += skb->len;
1214
1215 /* Workaround hardware that can't do proper VEPA multicast
1216 * source pruning.
1217 */
1218 if ((skb->pkt_type == PACKET_BROADCAST ||
1219 skb->pkt_type == PACKET_MULTICAST) &&
1220 ether_addr_equal(rx_ring->netdev->dev_addr,
1221 eth_hdr(skb)->h_source)) {
1222 dev_kfree_skb_irq(skb);
1223 continue;
1224 }
1225
1226 /* populate checksum, VLAN, and protocol */
1227 ixgbevf_process_skb_fields(rx_ring, rx_desc, skb);
1228
1229 ixgbevf_rx_skb(q_vector, skb);
1230
1231 /* reset skb pointer */
1232 skb = NULL;
1233
1234 /* update budget accounting */
1235 total_rx_packets++;
1236 }
1237
1238 /* place incomplete frames back on ring for completion */
1239 rx_ring->skb = skb;
1240
1241 if (xdp_xmit) {
1242 struct ixgbevf_ring *xdp_ring =
1243 adapter->xdp_ring[rx_ring->queue_index];
1244
1245 /* Force memory writes to complete before letting h/w
1246 * know there are new descriptors to fetch.
1247 */
1248 wmb();
1249 ixgbevf_write_tail(xdp_ring, xdp_ring->next_to_use);
1250 }
1251
1252 u64_stats_update_begin(&rx_ring->syncp);
1253 rx_ring->stats.packets += total_rx_packets;
1254 rx_ring->stats.bytes += total_rx_bytes;
1255 u64_stats_update_end(&rx_ring->syncp);
1256 q_vector->rx.total_packets += total_rx_packets;
1257 q_vector->rx.total_bytes += total_rx_bytes;
1258
1259 return total_rx_packets;
1260}
1261
1262/**
1263 * ixgbevf_poll - NAPI polling calback
1264 * @napi: napi struct with our devices info in it
1265 * @budget: amount of work driver is allowed to do this pass, in packets
1266 *
1267 * This function will clean more than one or more rings associated with a
1268 * q_vector.
1269 **/
1270static int ixgbevf_poll(struct napi_struct *napi, int budget)
1271{
1272 struct ixgbevf_q_vector *q_vector =
1273 container_of(napi, struct ixgbevf_q_vector, napi);
1274 struct ixgbevf_adapter *adapter = q_vector->adapter;
1275 struct ixgbevf_ring *ring;
1276 int per_ring_budget, work_done = 0;
1277 bool clean_complete = true;
1278
1279 ixgbevf_for_each_ring(ring, q_vector->tx) {
1280 if (!ixgbevf_clean_tx_irq(q_vector, ring, budget))
1281 clean_complete = false;
1282 }
1283
1284 if (budget <= 0)
1285 return budget;
1286
1287 /* attempt to distribute budget to each queue fairly, but don't allow
1288 * the budget to go below 1 because we'll exit polling
1289 */
1290 if (q_vector->rx.count > 1)
1291 per_ring_budget = max(budget/q_vector->rx.count, 1);
1292 else
1293 per_ring_budget = budget;
1294
1295 ixgbevf_for_each_ring(ring, q_vector->rx) {
1296 int cleaned = ixgbevf_clean_rx_irq(q_vector, ring,
1297 per_ring_budget);
1298 work_done += cleaned;
1299 if (cleaned >= per_ring_budget)
1300 clean_complete = false;
1301 }
1302
1303 /* If all work not completed, return budget and keep polling */
1304 if (!clean_complete)
1305 return budget;
1306
1307 /* Exit the polling mode, but don't re-enable interrupts if stack might
1308 * poll us due to busy-polling
1309 */
1310 if (likely(napi_complete_done(napi, work_done))) {
1311 if (adapter->rx_itr_setting == 1)
1312 ixgbevf_set_itr(q_vector);
1313 if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&
1314 !test_bit(__IXGBEVF_REMOVING, &adapter->state))
1315 ixgbevf_irq_enable_queues(adapter,
1316 BIT(q_vector->v_idx));
1317 }
1318
1319 return min(work_done, budget - 1);
1320}
1321
1322/**
1323 * ixgbevf_write_eitr - write VTEITR register in hardware specific way
1324 * @q_vector: structure containing interrupt and ring information
1325 **/
1326void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector)
1327{
1328 struct ixgbevf_adapter *adapter = q_vector->adapter;
1329 struct ixgbe_hw *hw = &adapter->hw;
1330 int v_idx = q_vector->v_idx;
1331 u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
1332
1333 /* set the WDIS bit to not clear the timer bits and cause an
1334 * immediate assertion of the interrupt
1335 */
1336 itr_reg |= IXGBE_EITR_CNT_WDIS;
1337
1338 IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg);
1339}
1340
1341/**
1342 * ixgbevf_configure_msix - Configure MSI-X hardware
1343 * @adapter: board private structure
1344 *
1345 * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
1346 * interrupts.
1347 **/
1348static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter)
1349{
1350 struct ixgbevf_q_vector *q_vector;
1351 int q_vectors, v_idx;
1352
1353 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1354 adapter->eims_enable_mask = 0;
1355
1356 /* Populate the IVAR table and set the ITR values to the
1357 * corresponding register.
1358 */
1359 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1360 struct ixgbevf_ring *ring;
1361
1362 q_vector = adapter->q_vector[v_idx];
1363
1364 ixgbevf_for_each_ring(ring, q_vector->rx)
1365 ixgbevf_set_ivar(adapter, 0, ring->reg_idx, v_idx);
1366
1367 ixgbevf_for_each_ring(ring, q_vector->tx)
1368 ixgbevf_set_ivar(adapter, 1, ring->reg_idx, v_idx);
1369
1370 if (q_vector->tx.ring && !q_vector->rx.ring) {
1371 /* Tx only vector */
1372 if (adapter->tx_itr_setting == 1)
1373 q_vector->itr = IXGBE_12K_ITR;
1374 else
1375 q_vector->itr = adapter->tx_itr_setting;
1376 } else {
1377 /* Rx or Rx/Tx vector */
1378 if (adapter->rx_itr_setting == 1)
1379 q_vector->itr = IXGBE_20K_ITR;
1380 else
1381 q_vector->itr = adapter->rx_itr_setting;
1382 }
1383
1384 /* add q_vector eims value to global eims_enable_mask */
1385 adapter->eims_enable_mask |= BIT(v_idx);
1386
1387 ixgbevf_write_eitr(q_vector);
1388 }
1389
1390 ixgbevf_set_ivar(adapter, -1, 1, v_idx);
1391 /* setup eims_other and add value to global eims_enable_mask */
1392 adapter->eims_other = BIT(v_idx);
1393 adapter->eims_enable_mask |= adapter->eims_other;
1394}
1395
1396enum latency_range {
1397 lowest_latency = 0,
1398 low_latency = 1,
1399 bulk_latency = 2,
1400 latency_invalid = 255
1401};
1402
1403/**
1404 * ixgbevf_update_itr - update the dynamic ITR value based on statistics
1405 * @q_vector: structure containing interrupt and ring information
1406 * @ring_container: structure containing ring performance data
1407 *
1408 * Stores a new ITR value based on packets and byte
1409 * counts during the last interrupt. The advantage of per interrupt
1410 * computation is faster updates and more accurate ITR for the current
1411 * traffic pattern. Constants in this function were computed
1412 * based on theoretical maximum wire speed and thresholds were set based
1413 * on testing data as well as attempting to minimize response time
1414 * while increasing bulk throughput.
1415 **/
1416static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector,
1417 struct ixgbevf_ring_container *ring_container)
1418{
1419 int bytes = ring_container->total_bytes;
1420 int packets = ring_container->total_packets;
1421 u32 timepassed_us;
1422 u64 bytes_perint;
1423 u8 itr_setting = ring_container->itr;
1424
1425 if (packets == 0)
1426 return;
1427
1428 /* simple throttle rate management
1429 * 0-20MB/s lowest (100000 ints/s)
1430 * 20-100MB/s low (20000 ints/s)
1431 * 100-1249MB/s bulk (12000 ints/s)
1432 */
1433 /* what was last interrupt timeslice? */
1434 timepassed_us = q_vector->itr >> 2;
1435 if (timepassed_us == 0)
1436 return;
1437
1438 bytes_perint = bytes / timepassed_us; /* bytes/usec */
1439
1440 switch (itr_setting) {
1441 case lowest_latency:
1442 if (bytes_perint > 10)
1443 itr_setting = low_latency;
1444 break;
1445 case low_latency:
1446 if (bytes_perint > 20)
1447 itr_setting = bulk_latency;
1448 else if (bytes_perint <= 10)
1449 itr_setting = lowest_latency;
1450 break;
1451 case bulk_latency:
1452 if (bytes_perint <= 20)
1453 itr_setting = low_latency;
1454 break;
1455 }
1456
1457 /* clear work counters since we have the values we need */
1458 ring_container->total_bytes = 0;
1459 ring_container->total_packets = 0;
1460
1461 /* write updated itr to ring container */
1462 ring_container->itr = itr_setting;
1463}
1464
1465static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector)
1466{
1467 u32 new_itr = q_vector->itr;
1468 u8 current_itr;
1469
1470 ixgbevf_update_itr(q_vector, &q_vector->tx);
1471 ixgbevf_update_itr(q_vector, &q_vector->rx);
1472
1473 current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
1474
1475 switch (current_itr) {
1476 /* counts and packets in update_itr are dependent on these numbers */
1477 case lowest_latency:
1478 new_itr = IXGBE_100K_ITR;
1479 break;
1480 case low_latency:
1481 new_itr = IXGBE_20K_ITR;
1482 break;
1483 case bulk_latency:
1484 new_itr = IXGBE_12K_ITR;
1485 break;
1486 default:
1487 break;
1488 }
1489
1490 if (new_itr != q_vector->itr) {
1491 /* do an exponential smoothing */
1492 new_itr = (10 * new_itr * q_vector->itr) /
1493 ((9 * new_itr) + q_vector->itr);
1494
1495 /* save the algorithm value here */
1496 q_vector->itr = new_itr;
1497
1498 ixgbevf_write_eitr(q_vector);
1499 }
1500}
1501
1502static irqreturn_t ixgbevf_msix_other(int irq, void *data)
1503{
1504 struct ixgbevf_adapter *adapter = data;
1505 struct ixgbe_hw *hw = &adapter->hw;
1506
1507 hw->mac.get_link_status = 1;
1508
1509 ixgbevf_service_event_schedule(adapter);
1510
1511 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_other);
1512
1513 return IRQ_HANDLED;
1514}
1515
1516/**
1517 * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues)
1518 * @irq: unused
1519 * @data: pointer to our q_vector struct for this interrupt vector
1520 **/
1521static irqreturn_t ixgbevf_msix_clean_rings(int irq, void *data)
1522{
1523 struct ixgbevf_q_vector *q_vector = data;
1524
1525 /* EIAM disabled interrupts (on this vector) for us */
1526 if (q_vector->rx.ring || q_vector->tx.ring)
1527 napi_schedule_irqoff(&q_vector->napi);
1528
1529 return IRQ_HANDLED;
1530}
1531
1532/**
1533 * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
1534 * @adapter: board private structure
1535 *
1536 * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
1537 * interrupts from the kernel.
1538 **/
1539static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)
1540{
1541 struct net_device *netdev = adapter->netdev;
1542 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1543 unsigned int ri = 0, ti = 0;
1544 int vector, err;
1545
1546 for (vector = 0; vector < q_vectors; vector++) {
1547 struct ixgbevf_q_vector *q_vector = adapter->q_vector[vector];
1548 struct msix_entry *entry = &adapter->msix_entries[vector];
1549
1550 if (q_vector->tx.ring && q_vector->rx.ring) {
1551 snprintf(q_vector->name, sizeof(q_vector->name),
1552 "%s-TxRx-%u", netdev->name, ri++);
1553 ti++;
1554 } else if (q_vector->rx.ring) {
1555 snprintf(q_vector->name, sizeof(q_vector->name),
1556 "%s-rx-%u", netdev->name, ri++);
1557 } else if (q_vector->tx.ring) {
1558 snprintf(q_vector->name, sizeof(q_vector->name),
1559 "%s-tx-%u", netdev->name, ti++);
1560 } else {
1561 /* skip this unused q_vector */
1562 continue;
1563 }
1564 err = request_irq(entry->vector, &ixgbevf_msix_clean_rings, 0,
1565 q_vector->name, q_vector);
1566 if (err) {
1567 hw_dbg(&adapter->hw,
1568 "request_irq failed for MSIX interrupt Error: %d\n",
1569 err);
1570 goto free_queue_irqs;
1571 }
1572 }
1573
1574 err = request_irq(adapter->msix_entries[vector].vector,
1575 &ixgbevf_msix_other, 0, netdev->name, adapter);
1576 if (err) {
1577 hw_dbg(&adapter->hw, "request_irq for msix_other failed: %d\n",
1578 err);
1579 goto free_queue_irqs;
1580 }
1581
1582 return 0;
1583
1584free_queue_irqs:
1585 while (vector) {
1586 vector--;
1587 free_irq(adapter->msix_entries[vector].vector,
1588 adapter->q_vector[vector]);
1589 }
1590 /* This failure is non-recoverable - it indicates the system is
1591 * out of MSIX vector resources and the VF driver cannot run
1592 * without them. Set the number of msix vectors to zero
1593 * indicating that not enough can be allocated. The error
1594 * will be returned to the user indicating device open failed.
1595 * Any further attempts to force the driver to open will also
1596 * fail. The only way to recover is to unload the driver and
1597 * reload it again. If the system has recovered some MSIX
1598 * vectors then it may succeed.
1599 */
1600 adapter->num_msix_vectors = 0;
1601 return err;
1602}
1603
1604/**
1605 * ixgbevf_request_irq - initialize interrupts
1606 * @adapter: board private structure
1607 *
1608 * Attempts to configure interrupts using the best available
1609 * capabilities of the hardware and kernel.
1610 **/
1611static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter)
1612{
1613 int err = ixgbevf_request_msix_irqs(adapter);
1614
1615 if (err)
1616 hw_dbg(&adapter->hw, "request_irq failed, Error %d\n", err);
1617
1618 return err;
1619}
1620
1621static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)
1622{
1623 int i, q_vectors;
1624
1625 if (!adapter->msix_entries)
1626 return;
1627
1628 q_vectors = adapter->num_msix_vectors;
1629 i = q_vectors - 1;
1630
1631 free_irq(adapter->msix_entries[i].vector, adapter);
1632 i--;
1633
1634 for (; i >= 0; i--) {
1635 /* free only the irqs that were actually requested */
1636 if (!adapter->q_vector[i]->rx.ring &&
1637 !adapter->q_vector[i]->tx.ring)
1638 continue;
1639
1640 free_irq(adapter->msix_entries[i].vector,
1641 adapter->q_vector[i]);
1642 }
1643}
1644
1645/**
1646 * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
1647 * @adapter: board private structure
1648 **/
1649static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter)
1650{
1651 struct ixgbe_hw *hw = &adapter->hw;
1652 int i;
1653
1654 IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, 0);
1655 IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0);
1656 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, 0);
1657
1658 IXGBE_WRITE_FLUSH(hw);
1659
1660 for (i = 0; i < adapter->num_msix_vectors; i++)
1661 synchronize_irq(adapter->msix_entries[i].vector);
1662}
1663
1664/**
1665 * ixgbevf_irq_enable - Enable default interrupt generation settings
1666 * @adapter: board private structure
1667 **/
1668static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter)
1669{
1670 struct ixgbe_hw *hw = &adapter->hw;
1671
1672 IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, adapter->eims_enable_mask);
1673 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, adapter->eims_enable_mask);
1674 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_enable_mask);
1675}
1676
1677/**
1678 * ixgbevf_configure_tx_ring - Configure 82599 VF Tx ring after Reset
1679 * @adapter: board private structure
1680 * @ring: structure containing ring specific data
1681 *
1682 * Configure the Tx descriptor ring after a reset.
1683 **/
1684static void ixgbevf_configure_tx_ring(struct ixgbevf_adapter *adapter,
1685 struct ixgbevf_ring *ring)
1686{
1687 struct ixgbe_hw *hw = &adapter->hw;
1688 u64 tdba = ring->dma;
1689 int wait_loop = 10;
1690 u32 txdctl = IXGBE_TXDCTL_ENABLE;
1691 u8 reg_idx = ring->reg_idx;
1692
1693 /* disable queue to avoid issues while updating state */
1694 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
1695 IXGBE_WRITE_FLUSH(hw);
1696
1697 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(reg_idx), tdba & DMA_BIT_MASK(32));
1698 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(reg_idx), tdba >> 32);
1699 IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(reg_idx),
1700 ring->count * sizeof(union ixgbe_adv_tx_desc));
1701
1702 /* disable head writeback */
1703 IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAH(reg_idx), 0);
1704 IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAL(reg_idx), 0);
1705
1706 /* enable relaxed ordering */
1707 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(reg_idx),
1708 (IXGBE_DCA_TXCTRL_DESC_RRO_EN |
1709 IXGBE_DCA_TXCTRL_DATA_RRO_EN));
1710
1711 /* reset head and tail pointers */
1712 IXGBE_WRITE_REG(hw, IXGBE_VFTDH(reg_idx), 0);
1713 IXGBE_WRITE_REG(hw, IXGBE_VFTDT(reg_idx), 0);
1714 ring->tail = adapter->io_addr + IXGBE_VFTDT(reg_idx);
1715
1716 /* reset ntu and ntc to place SW in sync with hardwdare */
1717 ring->next_to_clean = 0;
1718 ring->next_to_use = 0;
1719
1720 /* In order to avoid issues WTHRESH + PTHRESH should always be equal
1721 * to or less than the number of on chip descriptors, which is
1722 * currently 40.
1723 */
1724 txdctl |= (8 << 16); /* WTHRESH = 8 */
1725
1726 /* Setting PTHRESH to 32 both improves performance */
1727 txdctl |= (1u << 8) | /* HTHRESH = 1 */
1728 32; /* PTHRESH = 32 */
1729
1730 /* reinitialize tx_buffer_info */
1731 memset(ring->tx_buffer_info, 0,
1732 sizeof(struct ixgbevf_tx_buffer) * ring->count);
1733
1734 clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &ring->state);
1735 clear_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state);
1736
1737 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), txdctl);
1738
1739 /* poll to verify queue is enabled */
1740 do {
1741 usleep_range(1000, 2000);
1742 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(reg_idx));
1743 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
1744 if (!wait_loop)
1745 hw_dbg(hw, "Could not enable Tx Queue %d\n", reg_idx);
1746}
1747
1748/**
1749 * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1750 * @adapter: board private structure
1751 *
1752 * Configure the Tx unit of the MAC after a reset.
1753 **/
1754static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter)
1755{
1756 u32 i;
1757
1758 /* Setup the HW Tx Head and Tail descriptor pointers */
1759 for (i = 0; i < adapter->num_tx_queues; i++)
1760 ixgbevf_configure_tx_ring(adapter, adapter->tx_ring[i]);
1761 for (i = 0; i < adapter->num_xdp_queues; i++)
1762 ixgbevf_configure_tx_ring(adapter, adapter->xdp_ring[i]);
1763}
1764
1765#define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1766
1767static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter,
1768 struct ixgbevf_ring *ring, int index)
1769{
1770 struct ixgbe_hw *hw = &adapter->hw;
1771 u32 srrctl;
1772
1773 srrctl = IXGBE_SRRCTL_DROP_EN;
1774
1775 srrctl |= IXGBEVF_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT;
1776 if (ring_uses_large_buffer(ring))
1777 srrctl |= IXGBEVF_RXBUFFER_3072 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1778 else
1779 srrctl |= IXGBEVF_RXBUFFER_2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1780 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1781
1782 IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl);
1783}
1784
1785static void ixgbevf_setup_psrtype(struct ixgbevf_adapter *adapter)
1786{
1787 struct ixgbe_hw *hw = &adapter->hw;
1788
1789 /* PSRTYPE must be initialized in 82599 */
1790 u32 psrtype = IXGBE_PSRTYPE_TCPHDR | IXGBE_PSRTYPE_UDPHDR |
1791 IXGBE_PSRTYPE_IPV4HDR | IXGBE_PSRTYPE_IPV6HDR |
1792 IXGBE_PSRTYPE_L2HDR;
1793
1794 if (adapter->num_rx_queues > 1)
1795 psrtype |= BIT(29);
1796
1797 IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype);
1798}
1799
1800#define IXGBEVF_MAX_RX_DESC_POLL 10
1801static void ixgbevf_disable_rx_queue(struct ixgbevf_adapter *adapter,
1802 struct ixgbevf_ring *ring)
1803{
1804 struct ixgbe_hw *hw = &adapter->hw;
1805 int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1806 u32 rxdctl;
1807 u8 reg_idx = ring->reg_idx;
1808
1809 if (IXGBE_REMOVED(hw->hw_addr))
1810 return;
1811 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1812 rxdctl &= ~IXGBE_RXDCTL_ENABLE;
1813
1814 /* write value back with RXDCTL.ENABLE bit cleared */
1815 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1816
1817 /* the hardware may take up to 100us to really disable the Rx queue */
1818 do {
1819 udelay(10);
1820 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1821 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
1822
1823 if (!wait_loop)
1824 pr_err("RXDCTL.ENABLE queue %d not cleared while polling\n",
1825 reg_idx);
1826}
1827
1828static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter,
1829 struct ixgbevf_ring *ring)
1830{
1831 struct ixgbe_hw *hw = &adapter->hw;
1832 int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1833 u32 rxdctl;
1834 u8 reg_idx = ring->reg_idx;
1835
1836 if (IXGBE_REMOVED(hw->hw_addr))
1837 return;
1838 do {
1839 usleep_range(1000, 2000);
1840 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1841 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
1842
1843 if (!wait_loop)
1844 pr_err("RXDCTL.ENABLE queue %d not set while polling\n",
1845 reg_idx);
1846}
1847
1848/**
1849 * ixgbevf_init_rss_key - Initialize adapter RSS key
1850 * @adapter: device handle
1851 *
1852 * Allocates and initializes the RSS key if it is not allocated.
1853 **/
1854static inline int ixgbevf_init_rss_key(struct ixgbevf_adapter *adapter)
1855{
1856 u32 *rss_key;
1857
1858 if (!adapter->rss_key) {
1859 rss_key = kzalloc(IXGBEVF_RSS_HASH_KEY_SIZE, GFP_KERNEL);
1860 if (unlikely(!rss_key))
1861 return -ENOMEM;
1862
1863 netdev_rss_key_fill(rss_key, IXGBEVF_RSS_HASH_KEY_SIZE);
1864 adapter->rss_key = rss_key;
1865 }
1866
1867 return 0;
1868}
1869
1870static void ixgbevf_setup_vfmrqc(struct ixgbevf_adapter *adapter)
1871{
1872 struct ixgbe_hw *hw = &adapter->hw;
1873 u32 vfmrqc = 0, vfreta = 0;
1874 u16 rss_i = adapter->num_rx_queues;
1875 u8 i, j;
1876
1877 /* Fill out hash function seeds */
1878 for (i = 0; i < IXGBEVF_VFRSSRK_REGS; i++)
1879 IXGBE_WRITE_REG(hw, IXGBE_VFRSSRK(i), *(adapter->rss_key + i));
1880
1881 for (i = 0, j = 0; i < IXGBEVF_X550_VFRETA_SIZE; i++, j++) {
1882 if (j == rss_i)
1883 j = 0;
1884
1885 adapter->rss_indir_tbl[i] = j;
1886
1887 vfreta |= j << (i & 0x3) * 8;
1888 if ((i & 3) == 3) {
1889 IXGBE_WRITE_REG(hw, IXGBE_VFRETA(i >> 2), vfreta);
1890 vfreta = 0;
1891 }
1892 }
1893
1894 /* Perform hash on these packet types */
1895 vfmrqc |= IXGBE_VFMRQC_RSS_FIELD_IPV4 |
1896 IXGBE_VFMRQC_RSS_FIELD_IPV4_TCP |
1897 IXGBE_VFMRQC_RSS_FIELD_IPV6 |
1898 IXGBE_VFMRQC_RSS_FIELD_IPV6_TCP;
1899
1900 vfmrqc |= IXGBE_VFMRQC_RSSEN;
1901
1902 IXGBE_WRITE_REG(hw, IXGBE_VFMRQC, vfmrqc);
1903}
1904
1905static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter *adapter,
1906 struct ixgbevf_ring *ring)
1907{
1908 struct ixgbe_hw *hw = &adapter->hw;
1909 union ixgbe_adv_rx_desc *rx_desc;
1910 u64 rdba = ring->dma;
1911 u32 rxdctl;
1912 u8 reg_idx = ring->reg_idx;
1913
1914 /* disable queue to avoid issues while updating state */
1915 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1916 ixgbevf_disable_rx_queue(adapter, ring);
1917
1918 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(reg_idx), rdba & DMA_BIT_MASK(32));
1919 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(reg_idx), rdba >> 32);
1920 IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(reg_idx),
1921 ring->count * sizeof(union ixgbe_adv_rx_desc));
1922
1923#ifndef CONFIG_SPARC
1924 /* enable relaxed ordering */
1925 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),
1926 IXGBE_DCA_RXCTRL_DESC_RRO_EN);
1927#else
1928 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),
1929 IXGBE_DCA_RXCTRL_DESC_RRO_EN |
1930 IXGBE_DCA_RXCTRL_DATA_WRO_EN);
1931#endif
1932
1933 /* reset head and tail pointers */
1934 IXGBE_WRITE_REG(hw, IXGBE_VFRDH(reg_idx), 0);
1935 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(reg_idx), 0);
1936 ring->tail = adapter->io_addr + IXGBE_VFRDT(reg_idx);
1937
1938 /* initialize rx_buffer_info */
1939 memset(ring->rx_buffer_info, 0,
1940 sizeof(struct ixgbevf_rx_buffer) * ring->count);
1941
1942 /* initialize Rx descriptor 0 */
1943 rx_desc = IXGBEVF_RX_DESC(ring, 0);
1944 rx_desc->wb.upper.length = 0;
1945
1946 /* reset ntu and ntc to place SW in sync with hardwdare */
1947 ring->next_to_clean = 0;
1948 ring->next_to_use = 0;
1949 ring->next_to_alloc = 0;
1950
1951 ixgbevf_configure_srrctl(adapter, ring, reg_idx);
1952
1953 /* RXDCTL.RLPML does not work on 82599 */
1954 if (adapter->hw.mac.type != ixgbe_mac_82599_vf) {
1955 rxdctl &= ~(IXGBE_RXDCTL_RLPMLMASK |
1956 IXGBE_RXDCTL_RLPML_EN);
1957
1958#if (PAGE_SIZE < 8192)
1959 /* Limit the maximum frame size so we don't overrun the skb */
1960 if (ring_uses_build_skb(ring) &&
1961 !ring_uses_large_buffer(ring))
1962 rxdctl |= IXGBEVF_MAX_FRAME_BUILD_SKB |
1963 IXGBE_RXDCTL_RLPML_EN;
1964#endif
1965 }
1966
1967 rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME;
1968 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1969
1970 ixgbevf_rx_desc_queue_enable(adapter, ring);
1971 ixgbevf_alloc_rx_buffers(ring, ixgbevf_desc_unused(ring));
1972}
1973
1974static void ixgbevf_set_rx_buffer_len(struct ixgbevf_adapter *adapter,
1975 struct ixgbevf_ring *rx_ring)
1976{
1977 struct net_device *netdev = adapter->netdev;
1978 unsigned int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1979
1980 /* set build_skb and buffer size flags */
1981 clear_ring_build_skb_enabled(rx_ring);
1982 clear_ring_uses_large_buffer(rx_ring);
1983
1984 if (adapter->flags & IXGBEVF_FLAGS_LEGACY_RX)
1985 return;
1986
1987 if (PAGE_SIZE < 8192)
1988 if (max_frame > IXGBEVF_MAX_FRAME_BUILD_SKB)
1989 set_ring_uses_large_buffer(rx_ring);
1990
1991 /* 82599 can't rely on RXDCTL.RLPML to restrict the size of the frame */
1992 if (adapter->hw.mac.type == ixgbe_mac_82599_vf && !ring_uses_large_buffer(rx_ring))
1993 return;
1994
1995 set_ring_build_skb_enabled(rx_ring);
1996}
1997
1998/**
1999 * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
2000 * @adapter: board private structure
2001 *
2002 * Configure the Rx unit of the MAC after a reset.
2003 **/
2004static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)
2005{
2006 struct ixgbe_hw *hw = &adapter->hw;
2007 struct net_device *netdev = adapter->netdev;
2008 int i, ret;
2009
2010 ixgbevf_setup_psrtype(adapter);
2011 if (hw->mac.type >= ixgbe_mac_X550_vf)
2012 ixgbevf_setup_vfmrqc(adapter);
2013
2014 spin_lock_bh(&adapter->mbx_lock);
2015 /* notify the PF of our intent to use this size of frame */
2016 ret = hw->mac.ops.set_rlpml(hw, netdev->mtu + ETH_HLEN + ETH_FCS_LEN);
2017 spin_unlock_bh(&adapter->mbx_lock);
2018 if (ret)
2019 dev_err(&adapter->pdev->dev,
2020 "Failed to set MTU at %d\n", netdev->mtu);
2021
2022 /* Setup the HW Rx Head and Tail Descriptor Pointers and
2023 * the Base and Length of the Rx Descriptor Ring
2024 */
2025 for (i = 0; i < adapter->num_rx_queues; i++) {
2026 struct ixgbevf_ring *rx_ring = adapter->rx_ring[i];
2027
2028 ixgbevf_set_rx_buffer_len(adapter, rx_ring);
2029 ixgbevf_configure_rx_ring(adapter, rx_ring);
2030 }
2031}
2032
2033static int ixgbevf_vlan_rx_add_vid(struct net_device *netdev,
2034 __be16 proto, u16 vid)
2035{
2036 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2037 struct ixgbe_hw *hw = &adapter->hw;
2038 int err;
2039
2040 spin_lock_bh(&adapter->mbx_lock);
2041
2042 /* add VID to filter table */
2043 err = hw->mac.ops.set_vfta(hw, vid, 0, true);
2044
2045 spin_unlock_bh(&adapter->mbx_lock);
2046
2047 if (err) {
2048 netdev_err(netdev, "VF could not set VLAN %d\n", vid);
2049
2050 /* translate error return types so error makes sense */
2051 if (err == IXGBE_ERR_MBX)
2052 return -EIO;
2053
2054 if (err == IXGBE_ERR_INVALID_ARGUMENT)
2055 return -EACCES;
2056 }
2057
2058 set_bit(vid, adapter->active_vlans);
2059
2060 return err;
2061}
2062
2063static int ixgbevf_vlan_rx_kill_vid(struct net_device *netdev,
2064 __be16 proto, u16 vid)
2065{
2066 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2067 struct ixgbe_hw *hw = &adapter->hw;
2068 int err;
2069
2070 spin_lock_bh(&adapter->mbx_lock);
2071
2072 /* remove VID from filter table */
2073 err = hw->mac.ops.set_vfta(hw, vid, 0, false);
2074
2075 spin_unlock_bh(&adapter->mbx_lock);
2076
2077 if (err)
2078 netdev_err(netdev, "Could not remove VLAN %d\n", vid);
2079
2080 clear_bit(vid, adapter->active_vlans);
2081
2082 return err;
2083}
2084
2085static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter)
2086{
2087 u16 vid;
2088
2089 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
2090 ixgbevf_vlan_rx_add_vid(adapter->netdev,
2091 htons(ETH_P_8021Q), vid);
2092}
2093
2094static int ixgbevf_write_uc_addr_list(struct net_device *netdev)
2095{
2096 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2097 struct ixgbe_hw *hw = &adapter->hw;
2098 int count = 0;
2099
2100 if (!netdev_uc_empty(netdev)) {
2101 struct netdev_hw_addr *ha;
2102
2103 netdev_for_each_uc_addr(ha, netdev) {
2104 hw->mac.ops.set_uc_addr(hw, ++count, ha->addr);
2105 udelay(200);
2106 }
2107 } else {
2108 /* If the list is empty then send message to PF driver to
2109 * clear all MAC VLANs on this VF.
2110 */
2111 hw->mac.ops.set_uc_addr(hw, 0, NULL);
2112 }
2113
2114 return count;
2115}
2116
2117/**
2118 * ixgbevf_set_rx_mode - Multicast and unicast set
2119 * @netdev: network interface device structure
2120 *
2121 * The set_rx_method entry point is called whenever the multicast address
2122 * list, unicast address list or the network interface flags are updated.
2123 * This routine is responsible for configuring the hardware for proper
2124 * multicast mode and configuring requested unicast filters.
2125 **/
2126static void ixgbevf_set_rx_mode(struct net_device *netdev)
2127{
2128 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2129 struct ixgbe_hw *hw = &adapter->hw;
2130 unsigned int flags = netdev->flags;
2131 int xcast_mode;
2132
2133 /* request the most inclusive mode we need */
2134 if (flags & IFF_PROMISC)
2135 xcast_mode = IXGBEVF_XCAST_MODE_PROMISC;
2136 else if (flags & IFF_ALLMULTI)
2137 xcast_mode = IXGBEVF_XCAST_MODE_ALLMULTI;
2138 else if (flags & (IFF_BROADCAST | IFF_MULTICAST))
2139 xcast_mode = IXGBEVF_XCAST_MODE_MULTI;
2140 else
2141 xcast_mode = IXGBEVF_XCAST_MODE_NONE;
2142
2143 spin_lock_bh(&adapter->mbx_lock);
2144
2145 hw->mac.ops.update_xcast_mode(hw, xcast_mode);
2146
2147 /* reprogram multicast list */
2148 hw->mac.ops.update_mc_addr_list(hw, netdev);
2149
2150 ixgbevf_write_uc_addr_list(netdev);
2151
2152 spin_unlock_bh(&adapter->mbx_lock);
2153}
2154
2155static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter)
2156{
2157 int q_idx;
2158 struct ixgbevf_q_vector *q_vector;
2159 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2160
2161 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2162 q_vector = adapter->q_vector[q_idx];
2163 napi_enable(&q_vector->napi);
2164 }
2165}
2166
2167static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter)
2168{
2169 int q_idx;
2170 struct ixgbevf_q_vector *q_vector;
2171 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2172
2173 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2174 q_vector = adapter->q_vector[q_idx];
2175 napi_disable(&q_vector->napi);
2176 }
2177}
2178
2179static int ixgbevf_configure_dcb(struct ixgbevf_adapter *adapter)
2180{
2181 struct ixgbe_hw *hw = &adapter->hw;
2182 unsigned int def_q = 0;
2183 unsigned int num_tcs = 0;
2184 unsigned int num_rx_queues = adapter->num_rx_queues;
2185 unsigned int num_tx_queues = adapter->num_tx_queues;
2186 int err;
2187
2188 spin_lock_bh(&adapter->mbx_lock);
2189
2190 /* fetch queue configuration from the PF */
2191 err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
2192
2193 spin_unlock_bh(&adapter->mbx_lock);
2194
2195 if (err)
2196 return err;
2197
2198 if (num_tcs > 1) {
2199 /* we need only one Tx queue */
2200 num_tx_queues = 1;
2201
2202 /* update default Tx ring register index */
2203 adapter->tx_ring[0]->reg_idx = def_q;
2204
2205 /* we need as many queues as traffic classes */
2206 num_rx_queues = num_tcs;
2207 }
2208
2209 /* if we have a bad config abort request queue reset */
2210 if ((adapter->num_rx_queues != num_rx_queues) ||
2211 (adapter->num_tx_queues != num_tx_queues)) {
2212 /* force mailbox timeout to prevent further messages */
2213 hw->mbx.timeout = 0;
2214
2215 /* wait for watchdog to come around and bail us out */
2216 set_bit(__IXGBEVF_QUEUE_RESET_REQUESTED, &adapter->state);
2217 }
2218
2219 return 0;
2220}
2221
2222static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
2223{
2224 ixgbevf_configure_dcb(adapter);
2225
2226 ixgbevf_set_rx_mode(adapter->netdev);
2227
2228 ixgbevf_restore_vlan(adapter);
2229 ixgbevf_ipsec_restore(adapter);
2230
2231 ixgbevf_configure_tx(adapter);
2232 ixgbevf_configure_rx(adapter);
2233}
2234
2235static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter)
2236{
2237 /* Only save pre-reset stats if there are some */
2238 if (adapter->stats.vfgprc || adapter->stats.vfgptc) {
2239 adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc -
2240 adapter->stats.base_vfgprc;
2241 adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc -
2242 adapter->stats.base_vfgptc;
2243 adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc -
2244 adapter->stats.base_vfgorc;
2245 adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc -
2246 adapter->stats.base_vfgotc;
2247 adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc -
2248 adapter->stats.base_vfmprc;
2249 }
2250}
2251
2252static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
2253{
2254 struct ixgbe_hw *hw = &adapter->hw;
2255
2256 adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC);
2257 adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB);
2258 adapter->stats.last_vfgorc |=
2259 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32);
2260 adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC);
2261 adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB);
2262 adapter->stats.last_vfgotc |=
2263 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32);
2264 adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC);
2265
2266 adapter->stats.base_vfgprc = adapter->stats.last_vfgprc;
2267 adapter->stats.base_vfgorc = adapter->stats.last_vfgorc;
2268 adapter->stats.base_vfgptc = adapter->stats.last_vfgptc;
2269 adapter->stats.base_vfgotc = adapter->stats.last_vfgotc;
2270 adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;
2271}
2272
2273static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
2274{
2275 struct ixgbe_hw *hw = &adapter->hw;
2276 static const int api[] = {
2277 ixgbe_mbox_api_15,
2278 ixgbe_mbox_api_14,
2279 ixgbe_mbox_api_13,
2280 ixgbe_mbox_api_12,
2281 ixgbe_mbox_api_11,
2282 ixgbe_mbox_api_10,
2283 ixgbe_mbox_api_unknown
2284 };
2285 int err, idx = 0;
2286
2287 spin_lock_bh(&adapter->mbx_lock);
2288
2289 while (api[idx] != ixgbe_mbox_api_unknown) {
2290 err = hw->mac.ops.negotiate_api_version(hw, api[idx]);
2291 if (!err)
2292 break;
2293 idx++;
2294 }
2295
2296 if (hw->api_version >= ixgbe_mbox_api_15) {
2297 hw->mbx.ops.init_params(hw);
2298 memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
2299 sizeof(struct ixgbe_mbx_operations));
2300 }
2301
2302 spin_unlock_bh(&adapter->mbx_lock);
2303}
2304
2305static void ixgbevf_up_complete(struct ixgbevf_adapter *adapter)
2306{
2307 struct net_device *netdev = adapter->netdev;
2308 struct pci_dev *pdev = adapter->pdev;
2309 struct ixgbe_hw *hw = &adapter->hw;
2310 bool state;
2311
2312 ixgbevf_configure_msix(adapter);
2313
2314 spin_lock_bh(&adapter->mbx_lock);
2315
2316 if (is_valid_ether_addr(hw->mac.addr))
2317 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
2318 else
2319 hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0);
2320
2321 spin_unlock_bh(&adapter->mbx_lock);
2322
2323 state = adapter->link_state;
2324 hw->mac.ops.get_link_state(hw, &adapter->link_state);
2325 if (state && state != adapter->link_state)
2326 dev_info(&pdev->dev, "VF is administratively disabled\n");
2327
2328 smp_mb__before_atomic();
2329 clear_bit(__IXGBEVF_DOWN, &adapter->state);
2330 ixgbevf_napi_enable_all(adapter);
2331
2332 /* clear any pending interrupts, may auto mask */
2333 IXGBE_READ_REG(hw, IXGBE_VTEICR);
2334 ixgbevf_irq_enable(adapter);
2335
2336 /* enable transmits */
2337 netif_tx_start_all_queues(netdev);
2338
2339 ixgbevf_save_reset_stats(adapter);
2340 ixgbevf_init_last_counter_stats(adapter);
2341
2342 hw->mac.get_link_status = 1;
2343 mod_timer(&adapter->service_timer, jiffies);
2344}
2345
2346void ixgbevf_up(struct ixgbevf_adapter *adapter)
2347{
2348 ixgbevf_configure(adapter);
2349
2350 ixgbevf_up_complete(adapter);
2351}
2352
2353/**
2354 * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
2355 * @rx_ring: ring to free buffers from
2356 **/
2357static void ixgbevf_clean_rx_ring(struct ixgbevf_ring *rx_ring)
2358{
2359 u16 i = rx_ring->next_to_clean;
2360
2361 /* Free Rx ring sk_buff */
2362 if (rx_ring->skb) {
2363 dev_kfree_skb(rx_ring->skb);
2364 rx_ring->skb = NULL;
2365 }
2366
2367 /* Free all the Rx ring pages */
2368 while (i != rx_ring->next_to_alloc) {
2369 struct ixgbevf_rx_buffer *rx_buffer;
2370
2371 rx_buffer = &rx_ring->rx_buffer_info[i];
2372
2373 /* Invalidate cache lines that may have been written to by
2374 * device so that we avoid corrupting memory.
2375 */
2376 dma_sync_single_range_for_cpu(rx_ring->dev,
2377 rx_buffer->dma,
2378 rx_buffer->page_offset,
2379 ixgbevf_rx_bufsz(rx_ring),
2380 DMA_FROM_DEVICE);
2381
2382 /* free resources associated with mapping */
2383 dma_unmap_page_attrs(rx_ring->dev,
2384 rx_buffer->dma,
2385 ixgbevf_rx_pg_size(rx_ring),
2386 DMA_FROM_DEVICE,
2387 IXGBEVF_RX_DMA_ATTR);
2388
2389 __page_frag_cache_drain(rx_buffer->page,
2390 rx_buffer->pagecnt_bias);
2391
2392 i++;
2393 if (i == rx_ring->count)
2394 i = 0;
2395 }
2396
2397 rx_ring->next_to_alloc = 0;
2398 rx_ring->next_to_clean = 0;
2399 rx_ring->next_to_use = 0;
2400}
2401
2402/**
2403 * ixgbevf_clean_tx_ring - Free Tx Buffers
2404 * @tx_ring: ring to be cleaned
2405 **/
2406static void ixgbevf_clean_tx_ring(struct ixgbevf_ring *tx_ring)
2407{
2408 u16 i = tx_ring->next_to_clean;
2409 struct ixgbevf_tx_buffer *tx_buffer = &tx_ring->tx_buffer_info[i];
2410
2411 while (i != tx_ring->next_to_use) {
2412 union ixgbe_adv_tx_desc *eop_desc, *tx_desc;
2413
2414 /* Free all the Tx ring sk_buffs */
2415 if (ring_is_xdp(tx_ring))
2416 page_frag_free(tx_buffer->data);
2417 else
2418 dev_kfree_skb_any(tx_buffer->skb);
2419
2420 /* unmap skb header data */
2421 dma_unmap_single(tx_ring->dev,
2422 dma_unmap_addr(tx_buffer, dma),
2423 dma_unmap_len(tx_buffer, len),
2424 DMA_TO_DEVICE);
2425
2426 /* check for eop_desc to determine the end of the packet */
2427 eop_desc = tx_buffer->next_to_watch;
2428 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
2429
2430 /* unmap remaining buffers */
2431 while (tx_desc != eop_desc) {
2432 tx_buffer++;
2433 tx_desc++;
2434 i++;
2435 if (unlikely(i == tx_ring->count)) {
2436 i = 0;
2437 tx_buffer = tx_ring->tx_buffer_info;
2438 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
2439 }
2440
2441 /* unmap any remaining paged data */
2442 if (dma_unmap_len(tx_buffer, len))
2443 dma_unmap_page(tx_ring->dev,
2444 dma_unmap_addr(tx_buffer, dma),
2445 dma_unmap_len(tx_buffer, len),
2446 DMA_TO_DEVICE);
2447 }
2448
2449 /* move us one more past the eop_desc for start of next pkt */
2450 tx_buffer++;
2451 i++;
2452 if (unlikely(i == tx_ring->count)) {
2453 i = 0;
2454 tx_buffer = tx_ring->tx_buffer_info;
2455 }
2456 }
2457
2458 /* reset next_to_use and next_to_clean */
2459 tx_ring->next_to_use = 0;
2460 tx_ring->next_to_clean = 0;
2461
2462}
2463
2464/**
2465 * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
2466 * @adapter: board private structure
2467 **/
2468static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter)
2469{
2470 int i;
2471
2472 for (i = 0; i < adapter->num_rx_queues; i++)
2473 ixgbevf_clean_rx_ring(adapter->rx_ring[i]);
2474}
2475
2476/**
2477 * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
2478 * @adapter: board private structure
2479 **/
2480static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter)
2481{
2482 int i;
2483
2484 for (i = 0; i < adapter->num_tx_queues; i++)
2485 ixgbevf_clean_tx_ring(adapter->tx_ring[i]);
2486 for (i = 0; i < adapter->num_xdp_queues; i++)
2487 ixgbevf_clean_tx_ring(adapter->xdp_ring[i]);
2488}
2489
2490void ixgbevf_down(struct ixgbevf_adapter *adapter)
2491{
2492 struct net_device *netdev = adapter->netdev;
2493 struct ixgbe_hw *hw = &adapter->hw;
2494 int i;
2495
2496 /* signal that we are down to the interrupt handler */
2497 if (test_and_set_bit(__IXGBEVF_DOWN, &adapter->state))
2498 return; /* do nothing if already down */
2499
2500 /* disable all enabled Rx queues */
2501 for (i = 0; i < adapter->num_rx_queues; i++)
2502 ixgbevf_disable_rx_queue(adapter, adapter->rx_ring[i]);
2503
2504 usleep_range(10000, 20000);
2505
2506 netif_tx_stop_all_queues(netdev);
2507
2508 /* call carrier off first to avoid false dev_watchdog timeouts */
2509 netif_carrier_off(netdev);
2510 netif_tx_disable(netdev);
2511
2512 ixgbevf_irq_disable(adapter);
2513
2514 ixgbevf_napi_disable_all(adapter);
2515
2516 del_timer_sync(&adapter->service_timer);
2517
2518 /* disable transmits in the hardware now that interrupts are off */
2519 for (i = 0; i < adapter->num_tx_queues; i++) {
2520 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
2521
2522 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx),
2523 IXGBE_TXDCTL_SWFLSH);
2524 }
2525
2526 for (i = 0; i < adapter->num_xdp_queues; i++) {
2527 u8 reg_idx = adapter->xdp_ring[i]->reg_idx;
2528
2529 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx),
2530 IXGBE_TXDCTL_SWFLSH);
2531 }
2532
2533 if (!pci_channel_offline(adapter->pdev))
2534 ixgbevf_reset(adapter);
2535
2536 ixgbevf_clean_all_tx_rings(adapter);
2537 ixgbevf_clean_all_rx_rings(adapter);
2538}
2539
2540void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)
2541{
2542 while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
2543 msleep(1);
2544
2545 ixgbevf_down(adapter);
2546 pci_set_master(adapter->pdev);
2547 ixgbevf_up(adapter);
2548
2549 clear_bit(__IXGBEVF_RESETTING, &adapter->state);
2550}
2551
2552void ixgbevf_reset(struct ixgbevf_adapter *adapter)
2553{
2554 struct ixgbe_hw *hw = &adapter->hw;
2555 struct net_device *netdev = adapter->netdev;
2556
2557 if (hw->mac.ops.reset_hw(hw)) {
2558 hw_dbg(hw, "PF still resetting\n");
2559 } else {
2560 hw->mac.ops.init_hw(hw);
2561 ixgbevf_negotiate_api(adapter);
2562 }
2563
2564 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
2565 eth_hw_addr_set(netdev, adapter->hw.mac.addr);
2566 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2567 }
2568
2569 adapter->last_reset = jiffies;
2570}
2571
2572static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter,
2573 int vectors)
2574{
2575 int vector_threshold;
2576
2577 /* We'll want at least 2 (vector_threshold):
2578 * 1) TxQ[0] + RxQ[0] handler
2579 * 2) Other (Link Status Change, etc.)
2580 */
2581 vector_threshold = MIN_MSIX_COUNT;
2582
2583 /* The more we get, the more we will assign to Tx/Rx Cleanup
2584 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
2585 * Right now, we simply care about how many we'll get; we'll
2586 * set them up later while requesting irq's.
2587 */
2588 vectors = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
2589 vector_threshold, vectors);
2590
2591 if (vectors < 0) {
2592 dev_err(&adapter->pdev->dev,
2593 "Unable to allocate MSI-X interrupts\n");
2594 kfree(adapter->msix_entries);
2595 adapter->msix_entries = NULL;
2596 return vectors;
2597 }
2598
2599 /* Adjust for only the vectors we'll use, which is minimum
2600 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
2601 * vectors we were allocated.
2602 */
2603 adapter->num_msix_vectors = vectors;
2604
2605 return 0;
2606}
2607
2608/**
2609 * ixgbevf_set_num_queues - Allocate queues for device, feature dependent
2610 * @adapter: board private structure to initialize
2611 *
2612 * This is the top level queue allocation routine. The order here is very
2613 * important, starting with the "most" number of features turned on at once,
2614 * and ending with the smallest set of features. This way large combinations
2615 * can be allocated if they're turned on, and smaller combinations are the
2616 * fall through conditions.
2617 *
2618 **/
2619static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
2620{
2621 struct ixgbe_hw *hw = &adapter->hw;
2622 unsigned int def_q = 0;
2623 unsigned int num_tcs = 0;
2624 int err;
2625
2626 /* Start with base case */
2627 adapter->num_rx_queues = 1;
2628 adapter->num_tx_queues = 1;
2629 adapter->num_xdp_queues = 0;
2630
2631 spin_lock_bh(&adapter->mbx_lock);
2632
2633 /* fetch queue configuration from the PF */
2634 err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
2635
2636 spin_unlock_bh(&adapter->mbx_lock);
2637
2638 if (err)
2639 return;
2640
2641 /* we need as many queues as traffic classes */
2642 if (num_tcs > 1) {
2643 adapter->num_rx_queues = num_tcs;
2644 } else {
2645 u16 rss = min_t(u16, num_online_cpus(), IXGBEVF_MAX_RSS_QUEUES);
2646
2647 switch (hw->api_version) {
2648 case ixgbe_mbox_api_11:
2649 case ixgbe_mbox_api_12:
2650 case ixgbe_mbox_api_13:
2651 case ixgbe_mbox_api_14:
2652 case ixgbe_mbox_api_15:
2653 if (adapter->xdp_prog &&
2654 hw->mac.max_tx_queues == rss)
2655 rss = rss > 3 ? 2 : 1;
2656
2657 adapter->num_rx_queues = rss;
2658 adapter->num_tx_queues = rss;
2659 adapter->num_xdp_queues = adapter->xdp_prog ? rss : 0;
2660 break;
2661 default:
2662 break;
2663 }
2664 }
2665}
2666
2667/**
2668 * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
2669 * @adapter: board private structure to initialize
2670 *
2671 * Attempt to configure the interrupts using the best available
2672 * capabilities of the hardware and the kernel.
2673 **/
2674static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter)
2675{
2676 int vector, v_budget;
2677
2678 /* It's easy to be greedy for MSI-X vectors, but it really
2679 * doesn't do us much good if we have a lot more vectors
2680 * than CPU's. So let's be conservative and only ask for
2681 * (roughly) the same number of vectors as there are CPU's.
2682 * The default is to use pairs of vectors.
2683 */
2684 v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);
2685 v_budget = min_t(int, v_budget, num_online_cpus());
2686 v_budget += NON_Q_VECTORS;
2687
2688 adapter->msix_entries = kcalloc(v_budget,
2689 sizeof(struct msix_entry), GFP_KERNEL);
2690 if (!adapter->msix_entries)
2691 return -ENOMEM;
2692
2693 for (vector = 0; vector < v_budget; vector++)
2694 adapter->msix_entries[vector].entry = vector;
2695
2696 /* A failure in MSI-X entry allocation isn't fatal, but the VF driver
2697 * does not support any other modes, so we will simply fail here. Note
2698 * that we clean up the msix_entries pointer else-where.
2699 */
2700 return ixgbevf_acquire_msix_vectors(adapter, v_budget);
2701}
2702
2703static void ixgbevf_add_ring(struct ixgbevf_ring *ring,
2704 struct ixgbevf_ring_container *head)
2705{
2706 ring->next = head->ring;
2707 head->ring = ring;
2708 head->count++;
2709}
2710
2711/**
2712 * ixgbevf_alloc_q_vector - Allocate memory for a single interrupt vector
2713 * @adapter: board private structure to initialize
2714 * @v_idx: index of vector in adapter struct
2715 * @txr_count: number of Tx rings for q vector
2716 * @txr_idx: index of first Tx ring to assign
2717 * @xdp_count: total number of XDP rings to allocate
2718 * @xdp_idx: index of first XDP ring to allocate
2719 * @rxr_count: number of Rx rings for q vector
2720 * @rxr_idx: index of first Rx ring to assign
2721 *
2722 * We allocate one q_vector. If allocation fails we return -ENOMEM.
2723 **/
2724static int ixgbevf_alloc_q_vector(struct ixgbevf_adapter *adapter, int v_idx,
2725 int txr_count, int txr_idx,
2726 int xdp_count, int xdp_idx,
2727 int rxr_count, int rxr_idx)
2728{
2729 struct ixgbevf_q_vector *q_vector;
2730 int reg_idx = txr_idx + xdp_idx;
2731 struct ixgbevf_ring *ring;
2732 int ring_count, size;
2733
2734 ring_count = txr_count + xdp_count + rxr_count;
2735 size = sizeof(*q_vector) + (sizeof(*ring) * ring_count);
2736
2737 /* allocate q_vector and rings */
2738 q_vector = kzalloc(size, GFP_KERNEL);
2739 if (!q_vector)
2740 return -ENOMEM;
2741
2742 /* initialize NAPI */
2743 netif_napi_add(adapter->netdev, &q_vector->napi, ixgbevf_poll);
2744
2745 /* tie q_vector and adapter together */
2746 adapter->q_vector[v_idx] = q_vector;
2747 q_vector->adapter = adapter;
2748 q_vector->v_idx = v_idx;
2749
2750 /* initialize pointer to rings */
2751 ring = q_vector->ring;
2752
2753 while (txr_count) {
2754 /* assign generic ring traits */
2755 ring->dev = &adapter->pdev->dev;
2756 ring->netdev = adapter->netdev;
2757
2758 /* configure backlink on ring */
2759 ring->q_vector = q_vector;
2760
2761 /* update q_vector Tx values */
2762 ixgbevf_add_ring(ring, &q_vector->tx);
2763
2764 /* apply Tx specific ring traits */
2765 ring->count = adapter->tx_ring_count;
2766 ring->queue_index = txr_idx;
2767 ring->reg_idx = reg_idx;
2768
2769 /* assign ring to adapter */
2770 adapter->tx_ring[txr_idx] = ring;
2771
2772 /* update count and index */
2773 txr_count--;
2774 txr_idx++;
2775 reg_idx++;
2776
2777 /* push pointer to next ring */
2778 ring++;
2779 }
2780
2781 while (xdp_count) {
2782 /* assign generic ring traits */
2783 ring->dev = &adapter->pdev->dev;
2784 ring->netdev = adapter->netdev;
2785
2786 /* configure backlink on ring */
2787 ring->q_vector = q_vector;
2788
2789 /* update q_vector Tx values */
2790 ixgbevf_add_ring(ring, &q_vector->tx);
2791
2792 /* apply Tx specific ring traits */
2793 ring->count = adapter->tx_ring_count;
2794 ring->queue_index = xdp_idx;
2795 ring->reg_idx = reg_idx;
2796 set_ring_xdp(ring);
2797
2798 /* assign ring to adapter */
2799 adapter->xdp_ring[xdp_idx] = ring;
2800
2801 /* update count and index */
2802 xdp_count--;
2803 xdp_idx++;
2804 reg_idx++;
2805
2806 /* push pointer to next ring */
2807 ring++;
2808 }
2809
2810 while (rxr_count) {
2811 /* assign generic ring traits */
2812 ring->dev = &adapter->pdev->dev;
2813 ring->netdev = adapter->netdev;
2814
2815 /* configure backlink on ring */
2816 ring->q_vector = q_vector;
2817
2818 /* update q_vector Rx values */
2819 ixgbevf_add_ring(ring, &q_vector->rx);
2820
2821 /* apply Rx specific ring traits */
2822 ring->count = adapter->rx_ring_count;
2823 ring->queue_index = rxr_idx;
2824 ring->reg_idx = rxr_idx;
2825
2826 /* assign ring to adapter */
2827 adapter->rx_ring[rxr_idx] = ring;
2828
2829 /* update count and index */
2830 rxr_count--;
2831 rxr_idx++;
2832
2833 /* push pointer to next ring */
2834 ring++;
2835 }
2836
2837 return 0;
2838}
2839
2840/**
2841 * ixgbevf_free_q_vector - Free memory allocated for specific interrupt vector
2842 * @adapter: board private structure to initialize
2843 * @v_idx: index of vector in adapter struct
2844 *
2845 * This function frees the memory allocated to the q_vector. In addition if
2846 * NAPI is enabled it will delete any references to the NAPI struct prior
2847 * to freeing the q_vector.
2848 **/
2849static void ixgbevf_free_q_vector(struct ixgbevf_adapter *adapter, int v_idx)
2850{
2851 struct ixgbevf_q_vector *q_vector = adapter->q_vector[v_idx];
2852 struct ixgbevf_ring *ring;
2853
2854 ixgbevf_for_each_ring(ring, q_vector->tx) {
2855 if (ring_is_xdp(ring))
2856 adapter->xdp_ring[ring->queue_index] = NULL;
2857 else
2858 adapter->tx_ring[ring->queue_index] = NULL;
2859 }
2860
2861 ixgbevf_for_each_ring(ring, q_vector->rx)
2862 adapter->rx_ring[ring->queue_index] = NULL;
2863
2864 adapter->q_vector[v_idx] = NULL;
2865 netif_napi_del(&q_vector->napi);
2866
2867 /* ixgbevf_get_stats() might access the rings on this vector,
2868 * we must wait a grace period before freeing it.
2869 */
2870 kfree_rcu(q_vector, rcu);
2871}
2872
2873/**
2874 * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
2875 * @adapter: board private structure to initialize
2876 *
2877 * We allocate one q_vector per queue interrupt. If allocation fails we
2878 * return -ENOMEM.
2879 **/
2880static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)
2881{
2882 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2883 int rxr_remaining = adapter->num_rx_queues;
2884 int txr_remaining = adapter->num_tx_queues;
2885 int xdp_remaining = adapter->num_xdp_queues;
2886 int rxr_idx = 0, txr_idx = 0, xdp_idx = 0, v_idx = 0;
2887 int err;
2888
2889 if (q_vectors >= (rxr_remaining + txr_remaining + xdp_remaining)) {
2890 for (; rxr_remaining; v_idx++, q_vectors--) {
2891 int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors);
2892
2893 err = ixgbevf_alloc_q_vector(adapter, v_idx,
2894 0, 0, 0, 0, rqpv, rxr_idx);
2895 if (err)
2896 goto err_out;
2897
2898 /* update counts and index */
2899 rxr_remaining -= rqpv;
2900 rxr_idx += rqpv;
2901 }
2902 }
2903
2904 for (; q_vectors; v_idx++, q_vectors--) {
2905 int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors);
2906 int tqpv = DIV_ROUND_UP(txr_remaining, q_vectors);
2907 int xqpv = DIV_ROUND_UP(xdp_remaining, q_vectors);
2908
2909 err = ixgbevf_alloc_q_vector(adapter, v_idx,
2910 tqpv, txr_idx,
2911 xqpv, xdp_idx,
2912 rqpv, rxr_idx);
2913
2914 if (err)
2915 goto err_out;
2916
2917 /* update counts and index */
2918 rxr_remaining -= rqpv;
2919 rxr_idx += rqpv;
2920 txr_remaining -= tqpv;
2921 txr_idx += tqpv;
2922 xdp_remaining -= xqpv;
2923 xdp_idx += xqpv;
2924 }
2925
2926 return 0;
2927
2928err_out:
2929 while (v_idx) {
2930 v_idx--;
2931 ixgbevf_free_q_vector(adapter, v_idx);
2932 }
2933
2934 return -ENOMEM;
2935}
2936
2937/**
2938 * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
2939 * @adapter: board private structure to initialize
2940 *
2941 * This function frees the memory allocated to the q_vectors. In addition if
2942 * NAPI is enabled it will delete any references to the NAPI struct prior
2943 * to freeing the q_vector.
2944 **/
2945static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter)
2946{
2947 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2948
2949 while (q_vectors) {
2950 q_vectors--;
2951 ixgbevf_free_q_vector(adapter, q_vectors);
2952 }
2953}
2954
2955/**
2956 * ixgbevf_reset_interrupt_capability - Reset MSIX setup
2957 * @adapter: board private structure
2958 *
2959 **/
2960static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter)
2961{
2962 if (!adapter->msix_entries)
2963 return;
2964
2965 pci_disable_msix(adapter->pdev);
2966 kfree(adapter->msix_entries);
2967 adapter->msix_entries = NULL;
2968}
2969
2970/**
2971 * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
2972 * @adapter: board private structure to initialize
2973 *
2974 **/
2975static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter)
2976{
2977 int err;
2978
2979 /* Number of supported queues */
2980 ixgbevf_set_num_queues(adapter);
2981
2982 err = ixgbevf_set_interrupt_capability(adapter);
2983 if (err) {
2984 hw_dbg(&adapter->hw,
2985 "Unable to setup interrupt capabilities\n");
2986 goto err_set_interrupt;
2987 }
2988
2989 err = ixgbevf_alloc_q_vectors(adapter);
2990 if (err) {
2991 hw_dbg(&adapter->hw, "Unable to allocate memory for queue vectors\n");
2992 goto err_alloc_q_vectors;
2993 }
2994
2995 hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u XDP Queue count %u\n",
2996 (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled",
2997 adapter->num_rx_queues, adapter->num_tx_queues,
2998 adapter->num_xdp_queues);
2999
3000 set_bit(__IXGBEVF_DOWN, &adapter->state);
3001
3002 return 0;
3003err_alloc_q_vectors:
3004 ixgbevf_reset_interrupt_capability(adapter);
3005err_set_interrupt:
3006 return err;
3007}
3008
3009/**
3010 * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings
3011 * @adapter: board private structure to clear interrupt scheme on
3012 *
3013 * We go through and clear interrupt specific resources and reset the structure
3014 * to pre-load conditions
3015 **/
3016static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter)
3017{
3018 adapter->num_tx_queues = 0;
3019 adapter->num_xdp_queues = 0;
3020 adapter->num_rx_queues = 0;
3021
3022 ixgbevf_free_q_vectors(adapter);
3023 ixgbevf_reset_interrupt_capability(adapter);
3024}
3025
3026/**
3027 * ixgbevf_sw_init - Initialize general software structures
3028 * @adapter: board private structure to initialize
3029 *
3030 * ixgbevf_sw_init initializes the Adapter private data structure.
3031 * Fields are initialized based on PCI device information and
3032 * OS network device settings (MTU size).
3033 **/
3034static int ixgbevf_sw_init(struct ixgbevf_adapter *adapter)
3035{
3036 struct ixgbe_hw *hw = &adapter->hw;
3037 struct pci_dev *pdev = adapter->pdev;
3038 struct net_device *netdev = adapter->netdev;
3039 int err;
3040
3041 /* PCI config space info */
3042 hw->vendor_id = pdev->vendor;
3043 hw->device_id = pdev->device;
3044 hw->revision_id = pdev->revision;
3045 hw->subsystem_vendor_id = pdev->subsystem_vendor;
3046 hw->subsystem_device_id = pdev->subsystem_device;
3047
3048 hw->mbx.ops.init_params(hw);
3049
3050 if (hw->mac.type >= ixgbe_mac_X550_vf) {
3051 err = ixgbevf_init_rss_key(adapter);
3052 if (err)
3053 goto out;
3054 }
3055
3056 /* assume legacy case in which PF would only give VF 2 queues */
3057 hw->mac.max_tx_queues = 2;
3058 hw->mac.max_rx_queues = 2;
3059
3060 /* lock to protect mailbox accesses */
3061 spin_lock_init(&adapter->mbx_lock);
3062
3063 err = hw->mac.ops.reset_hw(hw);
3064 if (err) {
3065 dev_info(&pdev->dev,
3066 "PF still in reset state. Is the PF interface up?\n");
3067 } else {
3068 err = hw->mac.ops.init_hw(hw);
3069 if (err) {
3070 pr_err("init_shared_code failed: %d\n", err);
3071 goto out;
3072 }
3073 ixgbevf_negotiate_api(adapter);
3074 err = hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
3075 if (err)
3076 dev_info(&pdev->dev, "Error reading MAC address\n");
3077 else if (is_zero_ether_addr(adapter->hw.mac.addr))
3078 dev_info(&pdev->dev,
3079 "MAC address not assigned by administrator.\n");
3080 eth_hw_addr_set(netdev, hw->mac.addr);
3081 }
3082
3083 if (!is_valid_ether_addr(netdev->dev_addr)) {
3084 dev_info(&pdev->dev, "Assigning random MAC address\n");
3085 eth_hw_addr_random(netdev);
3086 ether_addr_copy(hw->mac.addr, netdev->dev_addr);
3087 ether_addr_copy(hw->mac.perm_addr, netdev->dev_addr);
3088 }
3089
3090 /* Enable dynamic interrupt throttling rates */
3091 adapter->rx_itr_setting = 1;
3092 adapter->tx_itr_setting = 1;
3093
3094 /* set default ring sizes */
3095 adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD;
3096 adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD;
3097
3098 adapter->link_state = true;
3099
3100 set_bit(__IXGBEVF_DOWN, &adapter->state);
3101 return 0;
3102
3103out:
3104 return err;
3105}
3106
3107#define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter) \
3108 { \
3109 u32 current_counter = IXGBE_READ_REG(hw, reg); \
3110 if (current_counter < last_counter) \
3111 counter += 0x100000000LL; \
3112 last_counter = current_counter; \
3113 counter &= 0xFFFFFFFF00000000LL; \
3114 counter |= current_counter; \
3115 }
3116
3117#define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
3118 { \
3119 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb); \
3120 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb); \
3121 u64 current_counter = (current_counter_msb << 32) | \
3122 current_counter_lsb; \
3123 if (current_counter < last_counter) \
3124 counter += 0x1000000000LL; \
3125 last_counter = current_counter; \
3126 counter &= 0xFFFFFFF000000000LL; \
3127 counter |= current_counter; \
3128 }
3129/**
3130 * ixgbevf_update_stats - Update the board statistics counters.
3131 * @adapter: board private structure
3132 **/
3133void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
3134{
3135 struct ixgbe_hw *hw = &adapter->hw;
3136 u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
3137 u64 alloc_rx_page = 0, hw_csum_rx_error = 0;
3138 int i;
3139
3140 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3141 test_bit(__IXGBEVF_RESETTING, &adapter->state))
3142 return;
3143
3144 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc,
3145 adapter->stats.vfgprc);
3146 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc,
3147 adapter->stats.vfgptc);
3148 UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB,
3149 adapter->stats.last_vfgorc,
3150 adapter->stats.vfgorc);
3151 UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB,
3152 adapter->stats.last_vfgotc,
3153 adapter->stats.vfgotc);
3154 UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
3155 adapter->stats.vfmprc);
3156
3157 for (i = 0; i < adapter->num_rx_queues; i++) {
3158 struct ixgbevf_ring *rx_ring = adapter->rx_ring[i];
3159
3160 hw_csum_rx_error += rx_ring->rx_stats.csum_err;
3161 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
3162 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
3163 alloc_rx_page += rx_ring->rx_stats.alloc_rx_page;
3164 }
3165
3166 adapter->hw_csum_rx_error = hw_csum_rx_error;
3167 adapter->alloc_rx_page_failed = alloc_rx_page_failed;
3168 adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
3169 adapter->alloc_rx_page = alloc_rx_page;
3170}
3171
3172/**
3173 * ixgbevf_service_timer - Timer Call-back
3174 * @t: pointer to timer_list struct
3175 **/
3176static void ixgbevf_service_timer(struct timer_list *t)
3177{
3178 struct ixgbevf_adapter *adapter = from_timer(adapter, t,
3179 service_timer);
3180
3181 /* Reset the timer */
3182 mod_timer(&adapter->service_timer, (HZ * 2) + jiffies);
3183
3184 ixgbevf_service_event_schedule(adapter);
3185}
3186
3187static void ixgbevf_reset_subtask(struct ixgbevf_adapter *adapter)
3188{
3189 if (!test_and_clear_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state))
3190 return;
3191
3192 rtnl_lock();
3193 /* If we're already down or resetting, just bail */
3194 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3195 test_bit(__IXGBEVF_REMOVING, &adapter->state) ||
3196 test_bit(__IXGBEVF_RESETTING, &adapter->state)) {
3197 rtnl_unlock();
3198 return;
3199 }
3200
3201 adapter->tx_timeout_count++;
3202
3203 ixgbevf_reinit_locked(adapter);
3204 rtnl_unlock();
3205}
3206
3207/**
3208 * ixgbevf_check_hang_subtask - check for hung queues and dropped interrupts
3209 * @adapter: pointer to the device adapter structure
3210 *
3211 * This function serves two purposes. First it strobes the interrupt lines
3212 * in order to make certain interrupts are occurring. Secondly it sets the
3213 * bits needed to check for TX hangs. As a result we should immediately
3214 * determine if a hang has occurred.
3215 **/
3216static void ixgbevf_check_hang_subtask(struct ixgbevf_adapter *adapter)
3217{
3218 struct ixgbe_hw *hw = &adapter->hw;
3219 u32 eics = 0;
3220 int i;
3221
3222 /* If we're down or resetting, just bail */
3223 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3224 test_bit(__IXGBEVF_RESETTING, &adapter->state))
3225 return;
3226
3227 /* Force detection of hung controller */
3228 if (netif_carrier_ok(adapter->netdev)) {
3229 for (i = 0; i < adapter->num_tx_queues; i++)
3230 set_check_for_tx_hang(adapter->tx_ring[i]);
3231 for (i = 0; i < adapter->num_xdp_queues; i++)
3232 set_check_for_tx_hang(adapter->xdp_ring[i]);
3233 }
3234
3235 /* get one bit for every active Tx/Rx interrupt vector */
3236 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
3237 struct ixgbevf_q_vector *qv = adapter->q_vector[i];
3238
3239 if (qv->rx.ring || qv->tx.ring)
3240 eics |= BIT(i);
3241 }
3242
3243 /* Cause software interrupt to ensure rings are cleaned */
3244 IXGBE_WRITE_REG(hw, IXGBE_VTEICS, eics);
3245}
3246
3247/**
3248 * ixgbevf_watchdog_update_link - update the link status
3249 * @adapter: pointer to the device adapter structure
3250 **/
3251static void ixgbevf_watchdog_update_link(struct ixgbevf_adapter *adapter)
3252{
3253 struct ixgbe_hw *hw = &adapter->hw;
3254 u32 link_speed = adapter->link_speed;
3255 bool link_up = adapter->link_up;
3256 s32 err;
3257
3258 spin_lock_bh(&adapter->mbx_lock);
3259
3260 err = hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
3261
3262 spin_unlock_bh(&adapter->mbx_lock);
3263
3264 /* if check for link returns error we will need to reset */
3265 if (err && time_after(jiffies, adapter->last_reset + (10 * HZ))) {
3266 set_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state);
3267 link_up = false;
3268 }
3269
3270 adapter->link_up = link_up;
3271 adapter->link_speed = link_speed;
3272}
3273
3274/**
3275 * ixgbevf_watchdog_link_is_up - update netif_carrier status and
3276 * print link up message
3277 * @adapter: pointer to the device adapter structure
3278 **/
3279static void ixgbevf_watchdog_link_is_up(struct ixgbevf_adapter *adapter)
3280{
3281 struct net_device *netdev = adapter->netdev;
3282
3283 /* only continue if link was previously down */
3284 if (netif_carrier_ok(netdev))
3285 return;
3286
3287 dev_info(&adapter->pdev->dev, "NIC Link is Up %s\n",
3288 (adapter->link_speed == IXGBE_LINK_SPEED_10GB_FULL) ?
3289 "10 Gbps" :
3290 (adapter->link_speed == IXGBE_LINK_SPEED_1GB_FULL) ?
3291 "1 Gbps" :
3292 (adapter->link_speed == IXGBE_LINK_SPEED_100_FULL) ?
3293 "100 Mbps" :
3294 "unknown speed");
3295
3296 netif_carrier_on(netdev);
3297}
3298
3299/**
3300 * ixgbevf_watchdog_link_is_down - update netif_carrier status and
3301 * print link down message
3302 * @adapter: pointer to the adapter structure
3303 **/
3304static void ixgbevf_watchdog_link_is_down(struct ixgbevf_adapter *adapter)
3305{
3306 struct net_device *netdev = adapter->netdev;
3307
3308 adapter->link_speed = 0;
3309
3310 /* only continue if link was up previously */
3311 if (!netif_carrier_ok(netdev))
3312 return;
3313
3314 dev_info(&adapter->pdev->dev, "NIC Link is Down\n");
3315
3316 netif_carrier_off(netdev);
3317}
3318
3319/**
3320 * ixgbevf_watchdog_subtask - worker thread to bring link up
3321 * @adapter: board private structure
3322 **/
3323static void ixgbevf_watchdog_subtask(struct ixgbevf_adapter *adapter)
3324{
3325 /* if interface is down do nothing */
3326 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3327 test_bit(__IXGBEVF_RESETTING, &adapter->state))
3328 return;
3329
3330 ixgbevf_watchdog_update_link(adapter);
3331
3332 if (adapter->link_up && adapter->link_state)
3333 ixgbevf_watchdog_link_is_up(adapter);
3334 else
3335 ixgbevf_watchdog_link_is_down(adapter);
3336
3337 ixgbevf_update_stats(adapter);
3338}
3339
3340/**
3341 * ixgbevf_service_task - manages and runs subtasks
3342 * @work: pointer to work_struct containing our data
3343 **/
3344static void ixgbevf_service_task(struct work_struct *work)
3345{
3346 struct ixgbevf_adapter *adapter = container_of(work,
3347 struct ixgbevf_adapter,
3348 service_task);
3349 struct ixgbe_hw *hw = &adapter->hw;
3350
3351 if (IXGBE_REMOVED(hw->hw_addr)) {
3352 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) {
3353 rtnl_lock();
3354 ixgbevf_down(adapter);
3355 rtnl_unlock();
3356 }
3357 return;
3358 }
3359
3360 ixgbevf_queue_reset_subtask(adapter);
3361 ixgbevf_reset_subtask(adapter);
3362 ixgbevf_watchdog_subtask(adapter);
3363 ixgbevf_check_hang_subtask(adapter);
3364
3365 ixgbevf_service_event_complete(adapter);
3366}
3367
3368/**
3369 * ixgbevf_free_tx_resources - Free Tx Resources per Queue
3370 * @tx_ring: Tx descriptor ring for a specific queue
3371 *
3372 * Free all transmit software resources
3373 **/
3374void ixgbevf_free_tx_resources(struct ixgbevf_ring *tx_ring)
3375{
3376 ixgbevf_clean_tx_ring(tx_ring);
3377
3378 vfree(tx_ring->tx_buffer_info);
3379 tx_ring->tx_buffer_info = NULL;
3380
3381 /* if not set, then don't free */
3382 if (!tx_ring->desc)
3383 return;
3384
3385 dma_free_coherent(tx_ring->dev, tx_ring->size, tx_ring->desc,
3386 tx_ring->dma);
3387
3388 tx_ring->desc = NULL;
3389}
3390
3391/**
3392 * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
3393 * @adapter: board private structure
3394 *
3395 * Free all transmit software resources
3396 **/
3397static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter)
3398{
3399 int i;
3400
3401 for (i = 0; i < adapter->num_tx_queues; i++)
3402 if (adapter->tx_ring[i]->desc)
3403 ixgbevf_free_tx_resources(adapter->tx_ring[i]);
3404 for (i = 0; i < adapter->num_xdp_queues; i++)
3405 if (adapter->xdp_ring[i]->desc)
3406 ixgbevf_free_tx_resources(adapter->xdp_ring[i]);
3407}
3408
3409/**
3410 * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
3411 * @tx_ring: Tx descriptor ring (for a specific queue) to setup
3412 *
3413 * Return 0 on success, negative on failure
3414 **/
3415int ixgbevf_setup_tx_resources(struct ixgbevf_ring *tx_ring)
3416{
3417 struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev);
3418 int size;
3419
3420 size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
3421 tx_ring->tx_buffer_info = vmalloc(size);
3422 if (!tx_ring->tx_buffer_info)
3423 goto err;
3424
3425 u64_stats_init(&tx_ring->syncp);
3426
3427 /* round up to nearest 4K */
3428 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
3429 tx_ring->size = ALIGN(tx_ring->size, 4096);
3430
3431 tx_ring->desc = dma_alloc_coherent(tx_ring->dev, tx_ring->size,
3432 &tx_ring->dma, GFP_KERNEL);
3433 if (!tx_ring->desc)
3434 goto err;
3435
3436 return 0;
3437
3438err:
3439 vfree(tx_ring->tx_buffer_info);
3440 tx_ring->tx_buffer_info = NULL;
3441 hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit descriptor ring\n");
3442 return -ENOMEM;
3443}
3444
3445/**
3446 * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
3447 * @adapter: board private structure
3448 *
3449 * If this function returns with an error, then it's possible one or
3450 * more of the rings is populated (while the rest are not). It is the
3451 * callers duty to clean those orphaned rings.
3452 *
3453 * Return 0 on success, negative on failure
3454 **/
3455static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)
3456{
3457 int i, j = 0, err = 0;
3458
3459 for (i = 0; i < adapter->num_tx_queues; i++) {
3460 err = ixgbevf_setup_tx_resources(adapter->tx_ring[i]);
3461 if (!err)
3462 continue;
3463 hw_dbg(&adapter->hw, "Allocation for Tx Queue %u failed\n", i);
3464 goto err_setup_tx;
3465 }
3466
3467 for (j = 0; j < adapter->num_xdp_queues; j++) {
3468 err = ixgbevf_setup_tx_resources(adapter->xdp_ring[j]);
3469 if (!err)
3470 continue;
3471 hw_dbg(&adapter->hw, "Allocation for XDP Queue %u failed\n", j);
3472 goto err_setup_tx;
3473 }
3474
3475 return 0;
3476err_setup_tx:
3477 /* rewind the index freeing the rings as we go */
3478 while (j--)
3479 ixgbevf_free_tx_resources(adapter->xdp_ring[j]);
3480 while (i--)
3481 ixgbevf_free_tx_resources(adapter->tx_ring[i]);
3482
3483 return err;
3484}
3485
3486/**
3487 * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
3488 * @adapter: board private structure
3489 * @rx_ring: Rx descriptor ring (for a specific queue) to setup
3490 *
3491 * Returns 0 on success, negative on failure
3492 **/
3493int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter,
3494 struct ixgbevf_ring *rx_ring)
3495{
3496 int size;
3497
3498 size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
3499 rx_ring->rx_buffer_info = vmalloc(size);
3500 if (!rx_ring->rx_buffer_info)
3501 goto err;
3502
3503 u64_stats_init(&rx_ring->syncp);
3504
3505 /* Round up to nearest 4K */
3506 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
3507 rx_ring->size = ALIGN(rx_ring->size, 4096);
3508
3509 rx_ring->desc = dma_alloc_coherent(rx_ring->dev, rx_ring->size,
3510 &rx_ring->dma, GFP_KERNEL);
3511
3512 if (!rx_ring->desc)
3513 goto err;
3514
3515 /* XDP RX-queue info */
3516 if (xdp_rxq_info_reg(&rx_ring->xdp_rxq, adapter->netdev,
3517 rx_ring->queue_index, 0) < 0)
3518 goto err;
3519
3520 rx_ring->xdp_prog = adapter->xdp_prog;
3521
3522 return 0;
3523err:
3524 vfree(rx_ring->rx_buffer_info);
3525 rx_ring->rx_buffer_info = NULL;
3526 dev_err(rx_ring->dev, "Unable to allocate memory for the Rx descriptor ring\n");
3527 return -ENOMEM;
3528}
3529
3530/**
3531 * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
3532 * @adapter: board private structure
3533 *
3534 * If this function returns with an error, then it's possible one or
3535 * more of the rings is populated (while the rest are not). It is the
3536 * callers duty to clean those orphaned rings.
3537 *
3538 * Return 0 on success, negative on failure
3539 **/
3540static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter)
3541{
3542 int i, err = 0;
3543
3544 for (i = 0; i < adapter->num_rx_queues; i++) {
3545 err = ixgbevf_setup_rx_resources(adapter, adapter->rx_ring[i]);
3546 if (!err)
3547 continue;
3548 hw_dbg(&adapter->hw, "Allocation for Rx Queue %u failed\n", i);
3549 goto err_setup_rx;
3550 }
3551
3552 return 0;
3553err_setup_rx:
3554 /* rewind the index freeing the rings as we go */
3555 while (i--)
3556 ixgbevf_free_rx_resources(adapter->rx_ring[i]);
3557 return err;
3558}
3559
3560/**
3561 * ixgbevf_free_rx_resources - Free Rx Resources
3562 * @rx_ring: ring to clean the resources from
3563 *
3564 * Free all receive software resources
3565 **/
3566void ixgbevf_free_rx_resources(struct ixgbevf_ring *rx_ring)
3567{
3568 ixgbevf_clean_rx_ring(rx_ring);
3569
3570 rx_ring->xdp_prog = NULL;
3571 xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
3572 vfree(rx_ring->rx_buffer_info);
3573 rx_ring->rx_buffer_info = NULL;
3574
3575 dma_free_coherent(rx_ring->dev, rx_ring->size, rx_ring->desc,
3576 rx_ring->dma);
3577
3578 rx_ring->desc = NULL;
3579}
3580
3581/**
3582 * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
3583 * @adapter: board private structure
3584 *
3585 * Free all receive software resources
3586 **/
3587static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter)
3588{
3589 int i;
3590
3591 for (i = 0; i < adapter->num_rx_queues; i++)
3592 if (adapter->rx_ring[i]->desc)
3593 ixgbevf_free_rx_resources(adapter->rx_ring[i]);
3594}
3595
3596/**
3597 * ixgbevf_open - Called when a network interface is made active
3598 * @netdev: network interface device structure
3599 *
3600 * Returns 0 on success, negative value on failure
3601 *
3602 * The open entry point is called when a network interface is made
3603 * active by the system (IFF_UP). At this point all resources needed
3604 * for transmit and receive operations are allocated, the interrupt
3605 * handler is registered with the OS, the watchdog timer is started,
3606 * and the stack is notified that the interface is ready.
3607 **/
3608int ixgbevf_open(struct net_device *netdev)
3609{
3610 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3611 struct ixgbe_hw *hw = &adapter->hw;
3612 int err;
3613
3614 /* A previous failure to open the device because of a lack of
3615 * available MSIX vector resources may have reset the number
3616 * of msix vectors variable to zero. The only way to recover
3617 * is to unload/reload the driver and hope that the system has
3618 * been able to recover some MSIX vector resources.
3619 */
3620 if (!adapter->num_msix_vectors)
3621 return -ENOMEM;
3622
3623 if (hw->adapter_stopped) {
3624 ixgbevf_reset(adapter);
3625 /* if adapter is still stopped then PF isn't up and
3626 * the VF can't start.
3627 */
3628 if (hw->adapter_stopped) {
3629 err = IXGBE_ERR_MBX;
3630 pr_err("Unable to start - perhaps the PF Driver isn't up yet\n");
3631 goto err_setup_reset;
3632 }
3633 }
3634
3635 /* disallow open during test */
3636 if (test_bit(__IXGBEVF_TESTING, &adapter->state))
3637 return -EBUSY;
3638
3639 netif_carrier_off(netdev);
3640
3641 /* allocate transmit descriptors */
3642 err = ixgbevf_setup_all_tx_resources(adapter);
3643 if (err)
3644 goto err_setup_tx;
3645
3646 /* allocate receive descriptors */
3647 err = ixgbevf_setup_all_rx_resources(adapter);
3648 if (err)
3649 goto err_setup_rx;
3650
3651 ixgbevf_configure(adapter);
3652
3653 err = ixgbevf_request_irq(adapter);
3654 if (err)
3655 goto err_req_irq;
3656
3657 /* Notify the stack of the actual queue counts. */
3658 err = netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues);
3659 if (err)
3660 goto err_set_queues;
3661
3662 err = netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues);
3663 if (err)
3664 goto err_set_queues;
3665
3666 ixgbevf_up_complete(adapter);
3667
3668 return 0;
3669
3670err_set_queues:
3671 ixgbevf_free_irq(adapter);
3672err_req_irq:
3673 ixgbevf_free_all_rx_resources(adapter);
3674err_setup_rx:
3675 ixgbevf_free_all_tx_resources(adapter);
3676err_setup_tx:
3677 ixgbevf_reset(adapter);
3678err_setup_reset:
3679
3680 return err;
3681}
3682
3683/**
3684 * ixgbevf_close_suspend - actions necessary to both suspend and close flows
3685 * @adapter: the private adapter struct
3686 *
3687 * This function should contain the necessary work common to both suspending
3688 * and closing of the device.
3689 */
3690static void ixgbevf_close_suspend(struct ixgbevf_adapter *adapter)
3691{
3692 ixgbevf_down(adapter);
3693 ixgbevf_free_irq(adapter);
3694 ixgbevf_free_all_tx_resources(adapter);
3695 ixgbevf_free_all_rx_resources(adapter);
3696}
3697
3698/**
3699 * ixgbevf_close - Disables a network interface
3700 * @netdev: network interface device structure
3701 *
3702 * Returns 0, this is not allowed to fail
3703 *
3704 * The close entry point is called when an interface is de-activated
3705 * by the OS. The hardware is still under the drivers control, but
3706 * needs to be disabled. A global MAC reset is issued to stop the
3707 * hardware, and all transmit and receive resources are freed.
3708 **/
3709int ixgbevf_close(struct net_device *netdev)
3710{
3711 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3712
3713 if (netif_device_present(netdev))
3714 ixgbevf_close_suspend(adapter);
3715
3716 return 0;
3717}
3718
3719static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter)
3720{
3721 struct net_device *dev = adapter->netdev;
3722
3723 if (!test_and_clear_bit(__IXGBEVF_QUEUE_RESET_REQUESTED,
3724 &adapter->state))
3725 return;
3726
3727 /* if interface is down do nothing */
3728 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3729 test_bit(__IXGBEVF_RESETTING, &adapter->state))
3730 return;
3731
3732 /* Hardware has to reinitialize queues and interrupts to
3733 * match packet buffer alignment. Unfortunately, the
3734 * hardware is not flexible enough to do this dynamically.
3735 */
3736 rtnl_lock();
3737
3738 if (netif_running(dev))
3739 ixgbevf_close(dev);
3740
3741 ixgbevf_clear_interrupt_scheme(adapter);
3742 ixgbevf_init_interrupt_scheme(adapter);
3743
3744 if (netif_running(dev))
3745 ixgbevf_open(dev);
3746
3747 rtnl_unlock();
3748}
3749
3750static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring *tx_ring,
3751 u32 vlan_macip_lens, u32 fceof_saidx,
3752 u32 type_tucmd, u32 mss_l4len_idx)
3753{
3754 struct ixgbe_adv_tx_context_desc *context_desc;
3755 u16 i = tx_ring->next_to_use;
3756
3757 context_desc = IXGBEVF_TX_CTXTDESC(tx_ring, i);
3758
3759 i++;
3760 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
3761
3762 /* set bits to identify this as an advanced context descriptor */
3763 type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT;
3764
3765 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
3766 context_desc->fceof_saidx = cpu_to_le32(fceof_saidx);
3767 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd);
3768 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
3769}
3770
3771static int ixgbevf_tso(struct ixgbevf_ring *tx_ring,
3772 struct ixgbevf_tx_buffer *first,
3773 u8 *hdr_len,
3774 struct ixgbevf_ipsec_tx_data *itd)
3775{
3776 u32 vlan_macip_lens, type_tucmd, mss_l4len_idx;
3777 struct sk_buff *skb = first->skb;
3778 union {
3779 struct iphdr *v4;
3780 struct ipv6hdr *v6;
3781 unsigned char *hdr;
3782 } ip;
3783 union {
3784 struct tcphdr *tcp;
3785 unsigned char *hdr;
3786 } l4;
3787 u32 paylen, l4_offset;
3788 u32 fceof_saidx = 0;
3789 int err;
3790
3791 if (skb->ip_summed != CHECKSUM_PARTIAL)
3792 return 0;
3793
3794 if (!skb_is_gso(skb))
3795 return 0;
3796
3797 err = skb_cow_head(skb, 0);
3798 if (err < 0)
3799 return err;
3800
3801 if (eth_p_mpls(first->protocol))
3802 ip.hdr = skb_inner_network_header(skb);
3803 else
3804 ip.hdr = skb_network_header(skb);
3805 l4.hdr = skb_checksum_start(skb);
3806
3807 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
3808 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
3809
3810 /* initialize outer IP header fields */
3811 if (ip.v4->version == 4) {
3812 unsigned char *csum_start = skb_checksum_start(skb);
3813 unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4);
3814 int len = csum_start - trans_start;
3815
3816 /* IP header will have to cancel out any data that
3817 * is not a part of the outer IP header, so set to
3818 * a reverse csum if needed, else init check to 0.
3819 */
3820 ip.v4->check = (skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) ?
3821 csum_fold(csum_partial(trans_start,
3822 len, 0)) : 0;
3823 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
3824
3825 ip.v4->tot_len = 0;
3826 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
3827 IXGBE_TX_FLAGS_CSUM |
3828 IXGBE_TX_FLAGS_IPV4;
3829 } else {
3830 ip.v6->payload_len = 0;
3831 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
3832 IXGBE_TX_FLAGS_CSUM;
3833 }
3834
3835 /* determine offset of inner transport header */
3836 l4_offset = l4.hdr - skb->data;
3837
3838 /* compute length of segmentation header */
3839 *hdr_len = (l4.tcp->doff * 4) + l4_offset;
3840
3841 /* remove payload length from inner checksum */
3842 paylen = skb->len - l4_offset;
3843 csum_replace_by_diff(&l4.tcp->check, (__force __wsum)htonl(paylen));
3844
3845 /* update gso size and bytecount with header size */
3846 first->gso_segs = skb_shinfo(skb)->gso_segs;
3847 first->bytecount += (first->gso_segs - 1) * *hdr_len;
3848
3849 /* mss_l4len_id: use 1 as index for TSO */
3850 mss_l4len_idx = (*hdr_len - l4_offset) << IXGBE_ADVTXD_L4LEN_SHIFT;
3851 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
3852 mss_l4len_idx |= (1u << IXGBE_ADVTXD_IDX_SHIFT);
3853
3854 fceof_saidx |= itd->pfsa;
3855 type_tucmd |= itd->flags | itd->trailer_len;
3856
3857 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
3858 vlan_macip_lens = l4.hdr - ip.hdr;
3859 vlan_macip_lens |= (ip.hdr - skb->data) << IXGBE_ADVTXD_MACLEN_SHIFT;
3860 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
3861
3862 ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens, fceof_saidx, type_tucmd,
3863 mss_l4len_idx);
3864
3865 return 1;
3866}
3867
3868static void ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring,
3869 struct ixgbevf_tx_buffer *first,
3870 struct ixgbevf_ipsec_tx_data *itd)
3871{
3872 struct sk_buff *skb = first->skb;
3873 u32 vlan_macip_lens = 0;
3874 u32 fceof_saidx = 0;
3875 u32 type_tucmd = 0;
3876
3877 if (skb->ip_summed != CHECKSUM_PARTIAL)
3878 goto no_csum;
3879
3880 switch (skb->csum_offset) {
3881 case offsetof(struct tcphdr, check):
3882 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
3883 fallthrough;
3884 case offsetof(struct udphdr, check):
3885 break;
3886 case offsetof(struct sctphdr, checksum):
3887 /* validate that this is actually an SCTP request */
3888 if (skb_csum_is_sctp(skb)) {
3889 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_SCTP;
3890 break;
3891 }
3892 fallthrough;
3893 default:
3894 skb_checksum_help(skb);
3895 goto no_csum;
3896 }
3897
3898 if (first->protocol == htons(ETH_P_IP))
3899 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
3900
3901 /* update TX checksum flag */
3902 first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
3903 vlan_macip_lens = skb_checksum_start_offset(skb) -
3904 skb_network_offset(skb);
3905no_csum:
3906 /* vlan_macip_lens: MACLEN, VLAN tag */
3907 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
3908 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
3909
3910 fceof_saidx |= itd->pfsa;
3911 type_tucmd |= itd->flags | itd->trailer_len;
3912
3913 ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
3914 fceof_saidx, type_tucmd, 0);
3915}
3916
3917static __le32 ixgbevf_tx_cmd_type(u32 tx_flags)
3918{
3919 /* set type for advanced descriptor with frame checksum insertion */
3920 __le32 cmd_type = cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA |
3921 IXGBE_ADVTXD_DCMD_IFCS |
3922 IXGBE_ADVTXD_DCMD_DEXT);
3923
3924 /* set HW VLAN bit if VLAN is present */
3925 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3926 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE);
3927
3928 /* set segmentation enable bits for TSO/FSO */
3929 if (tx_flags & IXGBE_TX_FLAGS_TSO)
3930 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE);
3931
3932 return cmd_type;
3933}
3934
3935static void ixgbevf_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
3936 u32 tx_flags, unsigned int paylen)
3937{
3938 __le32 olinfo_status = cpu_to_le32(paylen << IXGBE_ADVTXD_PAYLEN_SHIFT);
3939
3940 /* enable L4 checksum for TSO and TX checksum offload */
3941 if (tx_flags & IXGBE_TX_FLAGS_CSUM)
3942 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM);
3943
3944 /* enble IPv4 checksum for TSO */
3945 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
3946 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IXSM);
3947
3948 /* enable IPsec */
3949 if (tx_flags & IXGBE_TX_FLAGS_IPSEC)
3950 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IPSEC);
3951
3952 /* use index 1 context for TSO/FSO/FCOE/IPSEC */
3953 if (tx_flags & (IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_IPSEC))
3954 olinfo_status |= cpu_to_le32(1u << IXGBE_ADVTXD_IDX_SHIFT);
3955
3956 /* Check Context must be set if Tx switch is enabled, which it
3957 * always is for case where virtual functions are running
3958 */
3959 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_CC);
3960
3961 tx_desc->read.olinfo_status = olinfo_status;
3962}
3963
3964static void ixgbevf_tx_map(struct ixgbevf_ring *tx_ring,
3965 struct ixgbevf_tx_buffer *first,
3966 const u8 hdr_len)
3967{
3968 struct sk_buff *skb = first->skb;
3969 struct ixgbevf_tx_buffer *tx_buffer;
3970 union ixgbe_adv_tx_desc *tx_desc;
3971 skb_frag_t *frag;
3972 dma_addr_t dma;
3973 unsigned int data_len, size;
3974 u32 tx_flags = first->tx_flags;
3975 __le32 cmd_type = ixgbevf_tx_cmd_type(tx_flags);
3976 u16 i = tx_ring->next_to_use;
3977
3978 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
3979
3980 ixgbevf_tx_olinfo_status(tx_desc, tx_flags, skb->len - hdr_len);
3981
3982 size = skb_headlen(skb);
3983 data_len = skb->data_len;
3984
3985 dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);
3986
3987 tx_buffer = first;
3988
3989 for (frag = &skb_shinfo(skb)->frags[0];; frag++) {
3990 if (dma_mapping_error(tx_ring->dev, dma))
3991 goto dma_error;
3992
3993 /* record length, and DMA address */
3994 dma_unmap_len_set(tx_buffer, len, size);
3995 dma_unmap_addr_set(tx_buffer, dma, dma);
3996
3997 tx_desc->read.buffer_addr = cpu_to_le64(dma);
3998
3999 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {
4000 tx_desc->read.cmd_type_len =
4001 cmd_type | cpu_to_le32(IXGBE_MAX_DATA_PER_TXD);
4002
4003 i++;
4004 tx_desc++;
4005 if (i == tx_ring->count) {
4006 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
4007 i = 0;
4008 }
4009 tx_desc->read.olinfo_status = 0;
4010
4011 dma += IXGBE_MAX_DATA_PER_TXD;
4012 size -= IXGBE_MAX_DATA_PER_TXD;
4013
4014 tx_desc->read.buffer_addr = cpu_to_le64(dma);
4015 }
4016
4017 if (likely(!data_len))
4018 break;
4019
4020 tx_desc->read.cmd_type_len = cmd_type | cpu_to_le32(size);
4021
4022 i++;
4023 tx_desc++;
4024 if (i == tx_ring->count) {
4025 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
4026 i = 0;
4027 }
4028 tx_desc->read.olinfo_status = 0;
4029
4030 size = skb_frag_size(frag);
4031 data_len -= size;
4032
4033 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,
4034 DMA_TO_DEVICE);
4035
4036 tx_buffer = &tx_ring->tx_buffer_info[i];
4037 }
4038
4039 /* write last descriptor with RS and EOP bits */
4040 cmd_type |= cpu_to_le32(size) | cpu_to_le32(IXGBE_TXD_CMD);
4041 tx_desc->read.cmd_type_len = cmd_type;
4042
4043 /* set the timestamp */
4044 first->time_stamp = jiffies;
4045
4046 skb_tx_timestamp(skb);
4047
4048 /* Force memory writes to complete before letting h/w know there
4049 * are new descriptors to fetch. (Only applicable for weak-ordered
4050 * memory model archs, such as IA-64).
4051 *
4052 * We also need this memory barrier (wmb) to make certain all of the
4053 * status bits have been updated before next_to_watch is written.
4054 */
4055 wmb();
4056
4057 /* set next_to_watch value indicating a packet is present */
4058 first->next_to_watch = tx_desc;
4059
4060 i++;
4061 if (i == tx_ring->count)
4062 i = 0;
4063
4064 tx_ring->next_to_use = i;
4065
4066 /* notify HW of packet */
4067 ixgbevf_write_tail(tx_ring, i);
4068
4069 return;
4070dma_error:
4071 dev_err(tx_ring->dev, "TX DMA map failed\n");
4072 tx_buffer = &tx_ring->tx_buffer_info[i];
4073
4074 /* clear dma mappings for failed tx_buffer_info map */
4075 while (tx_buffer != first) {
4076 if (dma_unmap_len(tx_buffer, len))
4077 dma_unmap_page(tx_ring->dev,
4078 dma_unmap_addr(tx_buffer, dma),
4079 dma_unmap_len(tx_buffer, len),
4080 DMA_TO_DEVICE);
4081 dma_unmap_len_set(tx_buffer, len, 0);
4082
4083 if (i-- == 0)
4084 i += tx_ring->count;
4085 tx_buffer = &tx_ring->tx_buffer_info[i];
4086 }
4087
4088 if (dma_unmap_len(tx_buffer, len))
4089 dma_unmap_single(tx_ring->dev,
4090 dma_unmap_addr(tx_buffer, dma),
4091 dma_unmap_len(tx_buffer, len),
4092 DMA_TO_DEVICE);
4093 dma_unmap_len_set(tx_buffer, len, 0);
4094
4095 dev_kfree_skb_any(tx_buffer->skb);
4096 tx_buffer->skb = NULL;
4097
4098 tx_ring->next_to_use = i;
4099}
4100
4101static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
4102{
4103 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
4104 /* Herbert's original patch had:
4105 * smp_mb__after_netif_stop_queue();
4106 * but since that doesn't exist yet, just open code it.
4107 */
4108 smp_mb();
4109
4110 /* We need to check again in a case another CPU has just
4111 * made room available.
4112 */
4113 if (likely(ixgbevf_desc_unused(tx_ring) < size))
4114 return -EBUSY;
4115
4116 /* A reprieve! - use start_queue because it doesn't call schedule */
4117 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
4118 ++tx_ring->tx_stats.restart_queue;
4119
4120 return 0;
4121}
4122
4123static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
4124{
4125 if (likely(ixgbevf_desc_unused(tx_ring) >= size))
4126 return 0;
4127 return __ixgbevf_maybe_stop_tx(tx_ring, size);
4128}
4129
4130static int ixgbevf_xmit_frame_ring(struct sk_buff *skb,
4131 struct ixgbevf_ring *tx_ring)
4132{
4133 struct ixgbevf_tx_buffer *first;
4134 int tso;
4135 u32 tx_flags = 0;
4136 u16 count = TXD_USE_COUNT(skb_headlen(skb));
4137 struct ixgbevf_ipsec_tx_data ipsec_tx = { 0 };
4138#if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
4139 unsigned short f;
4140#endif
4141 u8 hdr_len = 0;
4142 u8 *dst_mac = skb_header_pointer(skb, 0, 0, NULL);
4143
4144 if (!dst_mac || is_link_local_ether_addr(dst_mac)) {
4145 dev_kfree_skb_any(skb);
4146 return NETDEV_TX_OK;
4147 }
4148
4149 /* need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
4150 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
4151 * + 2 desc gap to keep tail from touching head,
4152 * + 1 desc for context descriptor,
4153 * otherwise try next time
4154 */
4155#if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
4156 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
4157 skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
4158
4159 count += TXD_USE_COUNT(skb_frag_size(frag));
4160 }
4161#else
4162 count += skb_shinfo(skb)->nr_frags;
4163#endif
4164 if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) {
4165 tx_ring->tx_stats.tx_busy++;
4166 return NETDEV_TX_BUSY;
4167 }
4168
4169 /* record the location of the first descriptor for this packet */
4170 first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
4171 first->skb = skb;
4172 first->bytecount = skb->len;
4173 first->gso_segs = 1;
4174
4175 if (skb_vlan_tag_present(skb)) {
4176 tx_flags |= skb_vlan_tag_get(skb);
4177 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
4178 tx_flags |= IXGBE_TX_FLAGS_VLAN;
4179 }
4180
4181 /* record initial flags and protocol */
4182 first->tx_flags = tx_flags;
4183 first->protocol = vlan_get_protocol(skb);
4184
4185#ifdef CONFIG_IXGBEVF_IPSEC
4186 if (xfrm_offload(skb) && !ixgbevf_ipsec_tx(tx_ring, first, &ipsec_tx))
4187 goto out_drop;
4188#endif
4189 tso = ixgbevf_tso(tx_ring, first, &hdr_len, &ipsec_tx);
4190 if (tso < 0)
4191 goto out_drop;
4192 else if (!tso)
4193 ixgbevf_tx_csum(tx_ring, first, &ipsec_tx);
4194
4195 ixgbevf_tx_map(tx_ring, first, hdr_len);
4196
4197 ixgbevf_maybe_stop_tx(tx_ring, DESC_NEEDED);
4198
4199 return NETDEV_TX_OK;
4200
4201out_drop:
4202 dev_kfree_skb_any(first->skb);
4203 first->skb = NULL;
4204
4205 return NETDEV_TX_OK;
4206}
4207
4208static netdev_tx_t ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
4209{
4210 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4211 struct ixgbevf_ring *tx_ring;
4212
4213 if (skb->len <= 0) {
4214 dev_kfree_skb_any(skb);
4215 return NETDEV_TX_OK;
4216 }
4217
4218 /* The minimum packet size for olinfo paylen is 17 so pad the skb
4219 * in order to meet this minimum size requirement.
4220 */
4221 if (skb->len < 17) {
4222 if (skb_padto(skb, 17))
4223 return NETDEV_TX_OK;
4224 skb->len = 17;
4225 }
4226
4227 tx_ring = adapter->tx_ring[skb->queue_mapping];
4228 return ixgbevf_xmit_frame_ring(skb, tx_ring);
4229}
4230
4231/**
4232 * ixgbevf_set_mac - Change the Ethernet Address of the NIC
4233 * @netdev: network interface device structure
4234 * @p: pointer to an address structure
4235 *
4236 * Returns 0 on success, negative on failure
4237 **/
4238static int ixgbevf_set_mac(struct net_device *netdev, void *p)
4239{
4240 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4241 struct ixgbe_hw *hw = &adapter->hw;
4242 struct sockaddr *addr = p;
4243 int err;
4244
4245 if (!is_valid_ether_addr(addr->sa_data))
4246 return -EADDRNOTAVAIL;
4247
4248 spin_lock_bh(&adapter->mbx_lock);
4249
4250 err = hw->mac.ops.set_rar(hw, 0, addr->sa_data, 0);
4251
4252 spin_unlock_bh(&adapter->mbx_lock);
4253
4254 if (err)
4255 return -EPERM;
4256
4257 ether_addr_copy(hw->mac.addr, addr->sa_data);
4258 ether_addr_copy(hw->mac.perm_addr, addr->sa_data);
4259 eth_hw_addr_set(netdev, addr->sa_data);
4260
4261 return 0;
4262}
4263
4264/**
4265 * ixgbevf_change_mtu - Change the Maximum Transfer Unit
4266 * @netdev: network interface device structure
4267 * @new_mtu: new value for maximum frame size
4268 *
4269 * Returns 0 on success, negative on failure
4270 **/
4271static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
4272{
4273 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4274 struct ixgbe_hw *hw = &adapter->hw;
4275 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4276 int ret;
4277
4278 /* prevent MTU being changed to a size unsupported by XDP */
4279 if (adapter->xdp_prog) {
4280 dev_warn(&adapter->pdev->dev, "MTU cannot be changed while XDP program is loaded\n");
4281 return -EPERM;
4282 }
4283
4284 spin_lock_bh(&adapter->mbx_lock);
4285 /* notify the PF of our intent to use this size of frame */
4286 ret = hw->mac.ops.set_rlpml(hw, max_frame);
4287 spin_unlock_bh(&adapter->mbx_lock);
4288 if (ret)
4289 return -EINVAL;
4290
4291 hw_dbg(hw, "changing MTU from %d to %d\n",
4292 netdev->mtu, new_mtu);
4293
4294 /* must set new MTU before calling down or up */
4295 netdev->mtu = new_mtu;
4296
4297 if (netif_running(netdev))
4298 ixgbevf_reinit_locked(adapter);
4299
4300 return 0;
4301}
4302
4303static int __maybe_unused ixgbevf_suspend(struct device *dev_d)
4304{
4305 struct net_device *netdev = dev_get_drvdata(dev_d);
4306 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4307
4308 rtnl_lock();
4309 netif_device_detach(netdev);
4310
4311 if (netif_running(netdev))
4312 ixgbevf_close_suspend(adapter);
4313
4314 ixgbevf_clear_interrupt_scheme(adapter);
4315 rtnl_unlock();
4316
4317 return 0;
4318}
4319
4320static int __maybe_unused ixgbevf_resume(struct device *dev_d)
4321{
4322 struct pci_dev *pdev = to_pci_dev(dev_d);
4323 struct net_device *netdev = pci_get_drvdata(pdev);
4324 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4325 u32 err;
4326
4327 adapter->hw.hw_addr = adapter->io_addr;
4328 smp_mb__before_atomic();
4329 clear_bit(__IXGBEVF_DISABLED, &adapter->state);
4330 pci_set_master(pdev);
4331
4332 ixgbevf_reset(adapter);
4333
4334 rtnl_lock();
4335 err = ixgbevf_init_interrupt_scheme(adapter);
4336 if (!err && netif_running(netdev))
4337 err = ixgbevf_open(netdev);
4338 rtnl_unlock();
4339 if (err)
4340 return err;
4341
4342 netif_device_attach(netdev);
4343
4344 return err;
4345}
4346
4347static void ixgbevf_shutdown(struct pci_dev *pdev)
4348{
4349 ixgbevf_suspend(&pdev->dev);
4350}
4351
4352static void ixgbevf_get_tx_ring_stats(struct rtnl_link_stats64 *stats,
4353 const struct ixgbevf_ring *ring)
4354{
4355 u64 bytes, packets;
4356 unsigned int start;
4357
4358 if (ring) {
4359 do {
4360 start = u64_stats_fetch_begin(&ring->syncp);
4361 bytes = ring->stats.bytes;
4362 packets = ring->stats.packets;
4363 } while (u64_stats_fetch_retry(&ring->syncp, start));
4364 stats->tx_bytes += bytes;
4365 stats->tx_packets += packets;
4366 }
4367}
4368
4369static void ixgbevf_get_stats(struct net_device *netdev,
4370 struct rtnl_link_stats64 *stats)
4371{
4372 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4373 unsigned int start;
4374 u64 bytes, packets;
4375 const struct ixgbevf_ring *ring;
4376 int i;
4377
4378 ixgbevf_update_stats(adapter);
4379
4380 stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc;
4381
4382 rcu_read_lock();
4383 for (i = 0; i < adapter->num_rx_queues; i++) {
4384 ring = adapter->rx_ring[i];
4385 do {
4386 start = u64_stats_fetch_begin(&ring->syncp);
4387 bytes = ring->stats.bytes;
4388 packets = ring->stats.packets;
4389 } while (u64_stats_fetch_retry(&ring->syncp, start));
4390 stats->rx_bytes += bytes;
4391 stats->rx_packets += packets;
4392 }
4393
4394 for (i = 0; i < adapter->num_tx_queues; i++) {
4395 ring = adapter->tx_ring[i];
4396 ixgbevf_get_tx_ring_stats(stats, ring);
4397 }
4398
4399 for (i = 0; i < adapter->num_xdp_queues; i++) {
4400 ring = adapter->xdp_ring[i];
4401 ixgbevf_get_tx_ring_stats(stats, ring);
4402 }
4403 rcu_read_unlock();
4404}
4405
4406#define IXGBEVF_MAX_MAC_HDR_LEN 127
4407#define IXGBEVF_MAX_NETWORK_HDR_LEN 511
4408
4409static netdev_features_t
4410ixgbevf_features_check(struct sk_buff *skb, struct net_device *dev,
4411 netdev_features_t features)
4412{
4413 unsigned int network_hdr_len, mac_hdr_len;
4414
4415 /* Make certain the headers can be described by a context descriptor */
4416 mac_hdr_len = skb_network_header(skb) - skb->data;
4417 if (unlikely(mac_hdr_len > IXGBEVF_MAX_MAC_HDR_LEN))
4418 return features & ~(NETIF_F_HW_CSUM |
4419 NETIF_F_SCTP_CRC |
4420 NETIF_F_HW_VLAN_CTAG_TX |
4421 NETIF_F_TSO |
4422 NETIF_F_TSO6);
4423
4424 network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb);
4425 if (unlikely(network_hdr_len > IXGBEVF_MAX_NETWORK_HDR_LEN))
4426 return features & ~(NETIF_F_HW_CSUM |
4427 NETIF_F_SCTP_CRC |
4428 NETIF_F_TSO |
4429 NETIF_F_TSO6);
4430
4431 /* We can only support IPV4 TSO in tunnels if we can mangle the
4432 * inner IP ID field, so strip TSO if MANGLEID is not supported.
4433 */
4434 if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID))
4435 features &= ~NETIF_F_TSO;
4436
4437 return features;
4438}
4439
4440static int ixgbevf_xdp_setup(struct net_device *dev, struct bpf_prog *prog)
4441{
4442 int i, frame_size = dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
4443 struct ixgbevf_adapter *adapter = netdev_priv(dev);
4444 struct bpf_prog *old_prog;
4445
4446 /* verify ixgbevf ring attributes are sufficient for XDP */
4447 for (i = 0; i < adapter->num_rx_queues; i++) {
4448 struct ixgbevf_ring *ring = adapter->rx_ring[i];
4449
4450 if (frame_size > ixgbevf_rx_bufsz(ring))
4451 return -EINVAL;
4452 }
4453
4454 old_prog = xchg(&adapter->xdp_prog, prog);
4455
4456 /* If transitioning XDP modes reconfigure rings */
4457 if (!!prog != !!old_prog) {
4458 /* Hardware has to reinitialize queues and interrupts to
4459 * match packet buffer alignment. Unfortunately, the
4460 * hardware is not flexible enough to do this dynamically.
4461 */
4462 if (netif_running(dev))
4463 ixgbevf_close(dev);
4464
4465 ixgbevf_clear_interrupt_scheme(adapter);
4466 ixgbevf_init_interrupt_scheme(adapter);
4467
4468 if (netif_running(dev))
4469 ixgbevf_open(dev);
4470 } else {
4471 for (i = 0; i < adapter->num_rx_queues; i++)
4472 xchg(&adapter->rx_ring[i]->xdp_prog, adapter->xdp_prog);
4473 }
4474
4475 if (old_prog)
4476 bpf_prog_put(old_prog);
4477
4478 return 0;
4479}
4480
4481static int ixgbevf_xdp(struct net_device *dev, struct netdev_bpf *xdp)
4482{
4483 switch (xdp->command) {
4484 case XDP_SETUP_PROG:
4485 return ixgbevf_xdp_setup(dev, xdp->prog);
4486 default:
4487 return -EINVAL;
4488 }
4489}
4490
4491static const struct net_device_ops ixgbevf_netdev_ops = {
4492 .ndo_open = ixgbevf_open,
4493 .ndo_stop = ixgbevf_close,
4494 .ndo_start_xmit = ixgbevf_xmit_frame,
4495 .ndo_set_rx_mode = ixgbevf_set_rx_mode,
4496 .ndo_get_stats64 = ixgbevf_get_stats,
4497 .ndo_validate_addr = eth_validate_addr,
4498 .ndo_set_mac_address = ixgbevf_set_mac,
4499 .ndo_change_mtu = ixgbevf_change_mtu,
4500 .ndo_tx_timeout = ixgbevf_tx_timeout,
4501 .ndo_vlan_rx_add_vid = ixgbevf_vlan_rx_add_vid,
4502 .ndo_vlan_rx_kill_vid = ixgbevf_vlan_rx_kill_vid,
4503 .ndo_features_check = ixgbevf_features_check,
4504 .ndo_bpf = ixgbevf_xdp,
4505};
4506
4507static void ixgbevf_assign_netdev_ops(struct net_device *dev)
4508{
4509 dev->netdev_ops = &ixgbevf_netdev_ops;
4510 ixgbevf_set_ethtool_ops(dev);
4511 dev->watchdog_timeo = 5 * HZ;
4512}
4513
4514/**
4515 * ixgbevf_probe - Device Initialization Routine
4516 * @pdev: PCI device information struct
4517 * @ent: entry in ixgbevf_pci_tbl
4518 *
4519 * Returns 0 on success, negative on failure
4520 *
4521 * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
4522 * The OS initialization, configuring of the adapter private structure,
4523 * and a hardware reset occur.
4524 **/
4525static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
4526{
4527 struct net_device *netdev;
4528 struct ixgbevf_adapter *adapter = NULL;
4529 struct ixgbe_hw *hw = NULL;
4530 const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
4531 bool disable_dev = false;
4532 int err;
4533
4534 err = pci_enable_device(pdev);
4535 if (err)
4536 return err;
4537
4538 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
4539 if (err) {
4540 dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
4541 goto err_dma;
4542 }
4543
4544 err = pci_request_regions(pdev, ixgbevf_driver_name);
4545 if (err) {
4546 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
4547 goto err_pci_reg;
4548 }
4549
4550 pci_set_master(pdev);
4551
4552 netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),
4553 MAX_TX_QUEUES);
4554 if (!netdev) {
4555 err = -ENOMEM;
4556 goto err_alloc_etherdev;
4557 }
4558
4559 SET_NETDEV_DEV(netdev, &pdev->dev);
4560
4561 adapter = netdev_priv(netdev);
4562
4563 adapter->netdev = netdev;
4564 adapter->pdev = pdev;
4565 hw = &adapter->hw;
4566 hw->back = adapter;
4567 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
4568
4569 /* call save state here in standalone driver because it relies on
4570 * adapter struct to exist, and needs to call netdev_priv
4571 */
4572 pci_save_state(pdev);
4573
4574 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
4575 pci_resource_len(pdev, 0));
4576 adapter->io_addr = hw->hw_addr;
4577 if (!hw->hw_addr) {
4578 err = -EIO;
4579 goto err_ioremap;
4580 }
4581
4582 ixgbevf_assign_netdev_ops(netdev);
4583
4584 /* Setup HW API */
4585 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
4586 hw->mac.type = ii->mac;
4587
4588 memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops_legacy,
4589 sizeof(struct ixgbe_mbx_operations));
4590
4591 /* setup the private structure */
4592 err = ixgbevf_sw_init(adapter);
4593 if (err)
4594 goto err_sw_init;
4595
4596 /* The HW MAC address was set and/or determined in sw_init */
4597 if (!is_valid_ether_addr(netdev->dev_addr)) {
4598 pr_err("invalid MAC address\n");
4599 err = -EIO;
4600 goto err_sw_init;
4601 }
4602
4603 netdev->hw_features = NETIF_F_SG |
4604 NETIF_F_TSO |
4605 NETIF_F_TSO6 |
4606 NETIF_F_RXCSUM |
4607 NETIF_F_HW_CSUM |
4608 NETIF_F_SCTP_CRC;
4609
4610#define IXGBEVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
4611 NETIF_F_GSO_GRE_CSUM | \
4612 NETIF_F_GSO_IPXIP4 | \
4613 NETIF_F_GSO_IPXIP6 | \
4614 NETIF_F_GSO_UDP_TUNNEL | \
4615 NETIF_F_GSO_UDP_TUNNEL_CSUM)
4616
4617 netdev->gso_partial_features = IXGBEVF_GSO_PARTIAL_FEATURES;
4618 netdev->hw_features |= NETIF_F_GSO_PARTIAL |
4619 IXGBEVF_GSO_PARTIAL_FEATURES;
4620
4621 netdev->features = netdev->hw_features | NETIF_F_HIGHDMA;
4622
4623 netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
4624 netdev->mpls_features |= NETIF_F_SG |
4625 NETIF_F_TSO |
4626 NETIF_F_TSO6 |
4627 NETIF_F_HW_CSUM;
4628 netdev->mpls_features |= IXGBEVF_GSO_PARTIAL_FEATURES;
4629 netdev->hw_enc_features |= netdev->vlan_features;
4630
4631 /* set this bit last since it cannot be part of vlan_features */
4632 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
4633 NETIF_F_HW_VLAN_CTAG_RX |
4634 NETIF_F_HW_VLAN_CTAG_TX;
4635
4636 netdev->priv_flags |= IFF_UNICAST_FLT;
4637 netdev->xdp_features = NETDEV_XDP_ACT_BASIC;
4638
4639 /* MTU range: 68 - 1504 or 9710 */
4640 netdev->min_mtu = ETH_MIN_MTU;
4641 switch (adapter->hw.api_version) {
4642 case ixgbe_mbox_api_11:
4643 case ixgbe_mbox_api_12:
4644 case ixgbe_mbox_api_13:
4645 case ixgbe_mbox_api_14:
4646 case ixgbe_mbox_api_15:
4647 netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE -
4648 (ETH_HLEN + ETH_FCS_LEN);
4649 break;
4650 default:
4651 if (adapter->hw.mac.type != ixgbe_mac_82599_vf)
4652 netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE -
4653 (ETH_HLEN + ETH_FCS_LEN);
4654 else
4655 netdev->max_mtu = ETH_DATA_LEN + ETH_FCS_LEN;
4656 break;
4657 }
4658
4659 if (IXGBE_REMOVED(hw->hw_addr)) {
4660 err = -EIO;
4661 goto err_sw_init;
4662 }
4663
4664 timer_setup(&adapter->service_timer, ixgbevf_service_timer, 0);
4665
4666 INIT_WORK(&adapter->service_task, ixgbevf_service_task);
4667 set_bit(__IXGBEVF_SERVICE_INITED, &adapter->state);
4668 clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state);
4669
4670 err = ixgbevf_init_interrupt_scheme(adapter);
4671 if (err)
4672 goto err_sw_init;
4673
4674 strcpy(netdev->name, "eth%d");
4675
4676 err = register_netdev(netdev);
4677 if (err)
4678 goto err_register;
4679
4680 pci_set_drvdata(pdev, netdev);
4681 netif_carrier_off(netdev);
4682 ixgbevf_init_ipsec_offload(adapter);
4683
4684 ixgbevf_init_last_counter_stats(adapter);
4685
4686 /* print the VF info */
4687 dev_info(&pdev->dev, "%pM\n", netdev->dev_addr);
4688 dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type);
4689
4690 switch (hw->mac.type) {
4691 case ixgbe_mac_X550_vf:
4692 dev_info(&pdev->dev, "Intel(R) X550 Virtual Function\n");
4693 break;
4694 case ixgbe_mac_X540_vf:
4695 dev_info(&pdev->dev, "Intel(R) X540 Virtual Function\n");
4696 break;
4697 case ixgbe_mac_82599_vf:
4698 default:
4699 dev_info(&pdev->dev, "Intel(R) 82599 Virtual Function\n");
4700 break;
4701 }
4702
4703 return 0;
4704
4705err_register:
4706 ixgbevf_clear_interrupt_scheme(adapter);
4707err_sw_init:
4708 ixgbevf_reset_interrupt_capability(adapter);
4709 iounmap(adapter->io_addr);
4710 kfree(adapter->rss_key);
4711err_ioremap:
4712 disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state);
4713 free_netdev(netdev);
4714err_alloc_etherdev:
4715 pci_release_regions(pdev);
4716err_pci_reg:
4717err_dma:
4718 if (!adapter || disable_dev)
4719 pci_disable_device(pdev);
4720 return err;
4721}
4722
4723/**
4724 * ixgbevf_remove - Device Removal Routine
4725 * @pdev: PCI device information struct
4726 *
4727 * ixgbevf_remove is called by the PCI subsystem to alert the driver
4728 * that it should release a PCI device. The could be caused by a
4729 * Hot-Plug event, or because the driver is going to be removed from
4730 * memory.
4731 **/
4732static void ixgbevf_remove(struct pci_dev *pdev)
4733{
4734 struct net_device *netdev = pci_get_drvdata(pdev);
4735 struct ixgbevf_adapter *adapter;
4736 bool disable_dev;
4737
4738 if (!netdev)
4739 return;
4740
4741 adapter = netdev_priv(netdev);
4742
4743 set_bit(__IXGBEVF_REMOVING, &adapter->state);
4744 cancel_work_sync(&adapter->service_task);
4745
4746 if (netdev->reg_state == NETREG_REGISTERED)
4747 unregister_netdev(netdev);
4748
4749 ixgbevf_stop_ipsec_offload(adapter);
4750 ixgbevf_clear_interrupt_scheme(adapter);
4751 ixgbevf_reset_interrupt_capability(adapter);
4752
4753 iounmap(adapter->io_addr);
4754 pci_release_regions(pdev);
4755
4756 hw_dbg(&adapter->hw, "Remove complete\n");
4757
4758 kfree(adapter->rss_key);
4759 disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state);
4760 free_netdev(netdev);
4761
4762 if (disable_dev)
4763 pci_disable_device(pdev);
4764}
4765
4766/**
4767 * ixgbevf_io_error_detected - called when PCI error is detected
4768 * @pdev: Pointer to PCI device
4769 * @state: The current pci connection state
4770 *
4771 * This function is called after a PCI bus error affecting
4772 * this device has been detected.
4773 **/
4774static pci_ers_result_t ixgbevf_io_error_detected(struct pci_dev *pdev,
4775 pci_channel_state_t state)
4776{
4777 struct net_device *netdev = pci_get_drvdata(pdev);
4778 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4779
4780 if (!test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state))
4781 return PCI_ERS_RESULT_DISCONNECT;
4782
4783 rtnl_lock();
4784 netif_device_detach(netdev);
4785
4786 if (netif_running(netdev))
4787 ixgbevf_close_suspend(adapter);
4788
4789 if (state == pci_channel_io_perm_failure) {
4790 rtnl_unlock();
4791 return PCI_ERS_RESULT_DISCONNECT;
4792 }
4793
4794 if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state))
4795 pci_disable_device(pdev);
4796 rtnl_unlock();
4797
4798 /* Request a slot reset. */
4799 return PCI_ERS_RESULT_NEED_RESET;
4800}
4801
4802/**
4803 * ixgbevf_io_slot_reset - called after the pci bus has been reset.
4804 * @pdev: Pointer to PCI device
4805 *
4806 * Restart the card from scratch, as if from a cold-boot. Implementation
4807 * resembles the first-half of the ixgbevf_resume routine.
4808 **/
4809static pci_ers_result_t ixgbevf_io_slot_reset(struct pci_dev *pdev)
4810{
4811 struct net_device *netdev = pci_get_drvdata(pdev);
4812 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4813
4814 if (pci_enable_device_mem(pdev)) {
4815 dev_err(&pdev->dev,
4816 "Cannot re-enable PCI device after reset.\n");
4817 return PCI_ERS_RESULT_DISCONNECT;
4818 }
4819
4820 adapter->hw.hw_addr = adapter->io_addr;
4821 smp_mb__before_atomic();
4822 clear_bit(__IXGBEVF_DISABLED, &adapter->state);
4823 pci_set_master(pdev);
4824
4825 ixgbevf_reset(adapter);
4826
4827 return PCI_ERS_RESULT_RECOVERED;
4828}
4829
4830/**
4831 * ixgbevf_io_resume - called when traffic can start flowing again.
4832 * @pdev: Pointer to PCI device
4833 *
4834 * This callback is called when the error recovery driver tells us that
4835 * its OK to resume normal operation. Implementation resembles the
4836 * second-half of the ixgbevf_resume routine.
4837 **/
4838static void ixgbevf_io_resume(struct pci_dev *pdev)
4839{
4840 struct net_device *netdev = pci_get_drvdata(pdev);
4841
4842 rtnl_lock();
4843 if (netif_running(netdev))
4844 ixgbevf_open(netdev);
4845
4846 netif_device_attach(netdev);
4847 rtnl_unlock();
4848}
4849
4850/* PCI Error Recovery (ERS) */
4851static const struct pci_error_handlers ixgbevf_err_handler = {
4852 .error_detected = ixgbevf_io_error_detected,
4853 .slot_reset = ixgbevf_io_slot_reset,
4854 .resume = ixgbevf_io_resume,
4855};
4856
4857static SIMPLE_DEV_PM_OPS(ixgbevf_pm_ops, ixgbevf_suspend, ixgbevf_resume);
4858
4859static struct pci_driver ixgbevf_driver = {
4860 .name = ixgbevf_driver_name,
4861 .id_table = ixgbevf_pci_tbl,
4862 .probe = ixgbevf_probe,
4863 .remove = ixgbevf_remove,
4864
4865 /* Power Management Hooks */
4866 .driver.pm = &ixgbevf_pm_ops,
4867
4868 .shutdown = ixgbevf_shutdown,
4869 .err_handler = &ixgbevf_err_handler
4870};
4871
4872/**
4873 * ixgbevf_init_module - Driver Registration Routine
4874 *
4875 * ixgbevf_init_module is the first routine called when the driver is
4876 * loaded. All it does is register with the PCI subsystem.
4877 **/
4878static int __init ixgbevf_init_module(void)
4879{
4880 int err;
4881
4882 pr_info("%s\n", ixgbevf_driver_string);
4883 pr_info("%s\n", ixgbevf_copyright);
4884 ixgbevf_wq = create_singlethread_workqueue(ixgbevf_driver_name);
4885 if (!ixgbevf_wq) {
4886 pr_err("%s: Failed to create workqueue\n", ixgbevf_driver_name);
4887 return -ENOMEM;
4888 }
4889
4890 err = pci_register_driver(&ixgbevf_driver);
4891 if (err) {
4892 destroy_workqueue(ixgbevf_wq);
4893 return err;
4894 }
4895
4896 return 0;
4897}
4898
4899module_init(ixgbevf_init_module);
4900
4901/**
4902 * ixgbevf_exit_module - Driver Exit Cleanup Routine
4903 *
4904 * ixgbevf_exit_module is called just before the driver is removed
4905 * from memory.
4906 **/
4907static void __exit ixgbevf_exit_module(void)
4908{
4909 pci_unregister_driver(&ixgbevf_driver);
4910 if (ixgbevf_wq) {
4911 destroy_workqueue(ixgbevf_wq);
4912 ixgbevf_wq = NULL;
4913 }
4914}
4915
4916#ifdef DEBUG
4917/**
4918 * ixgbevf_get_hw_dev_name - return device name string
4919 * used by hardware layer to print debugging information
4920 * @hw: pointer to private hardware struct
4921 **/
4922char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw)
4923{
4924 struct ixgbevf_adapter *adapter = hw->back;
4925
4926 return adapter->netdev->name;
4927}
4928
4929#endif
4930module_exit(ixgbevf_exit_module);
4931
4932/* ixgbevf_main.c */
1/*******************************************************************************
2
3 Intel 82599 Virtual Function driver
4 Copyright(c) 1999 - 2015 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, see <http://www.gnu.org/licenses/>.
17
18 The full GNU General Public License is included in this distribution in
19 the file called "COPYING".
20
21 Contact Information:
22 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
23 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24
25*******************************************************************************/
26
27/******************************************************************************
28 Copyright (c)2006 - 2007 Myricom, Inc. for some LRO specific code
29******************************************************************************/
30
31#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
32
33#include <linux/types.h>
34#include <linux/bitops.h>
35#include <linux/module.h>
36#include <linux/pci.h>
37#include <linux/netdevice.h>
38#include <linux/vmalloc.h>
39#include <linux/string.h>
40#include <linux/in.h>
41#include <linux/ip.h>
42#include <linux/tcp.h>
43#include <linux/sctp.h>
44#include <linux/ipv6.h>
45#include <linux/slab.h>
46#include <net/checksum.h>
47#include <net/ip6_checksum.h>
48#include <linux/ethtool.h>
49#include <linux/if.h>
50#include <linux/if_vlan.h>
51#include <linux/prefetch.h>
52
53#include "ixgbevf.h"
54
55const char ixgbevf_driver_name[] = "ixgbevf";
56static const char ixgbevf_driver_string[] =
57 "Intel(R) 10 Gigabit PCI Express Virtual Function Network Driver";
58
59#define DRV_VERSION "2.12.1-k"
60const char ixgbevf_driver_version[] = DRV_VERSION;
61static char ixgbevf_copyright[] =
62 "Copyright (c) 2009 - 2015 Intel Corporation.";
63
64static const struct ixgbevf_info *ixgbevf_info_tbl[] = {
65 [board_82599_vf] = &ixgbevf_82599_vf_info,
66 [board_X540_vf] = &ixgbevf_X540_vf_info,
67 [board_X550_vf] = &ixgbevf_X550_vf_info,
68 [board_X550EM_x_vf] = &ixgbevf_X550EM_x_vf_info,
69};
70
71/* ixgbevf_pci_tbl - PCI Device ID Table
72 *
73 * Wildcard entries (PCI_ANY_ID) should come last
74 * Last entry must be all 0s
75 *
76 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
77 * Class, Class Mask, private data (not used) }
78 */
79static const struct pci_device_id ixgbevf_pci_tbl[] = {
80 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF), board_82599_vf },
81 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF), board_X540_vf },
82 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550_VF), board_X550_vf },
83 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_VF), board_X550EM_x_vf },
84 /* required last entry */
85 {0, }
86};
87MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl);
88
89MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
90MODULE_DESCRIPTION("Intel(R) 10 Gigabit Virtual Function Network Driver");
91MODULE_LICENSE("GPL");
92MODULE_VERSION(DRV_VERSION);
93
94#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
95static int debug = -1;
96module_param(debug, int, 0);
97MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
98
99static struct workqueue_struct *ixgbevf_wq;
100
101static void ixgbevf_service_event_schedule(struct ixgbevf_adapter *adapter)
102{
103 if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&
104 !test_bit(__IXGBEVF_REMOVING, &adapter->state) &&
105 !test_and_set_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state))
106 queue_work(ixgbevf_wq, &adapter->service_task);
107}
108
109static void ixgbevf_service_event_complete(struct ixgbevf_adapter *adapter)
110{
111 BUG_ON(!test_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state));
112
113 /* flush memory to make sure state is correct before next watchdog */
114 smp_mb__before_atomic();
115 clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state);
116}
117
118/* forward decls */
119static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter);
120static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector);
121static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter);
122
123static void ixgbevf_remove_adapter(struct ixgbe_hw *hw)
124{
125 struct ixgbevf_adapter *adapter = hw->back;
126
127 if (!hw->hw_addr)
128 return;
129 hw->hw_addr = NULL;
130 dev_err(&adapter->pdev->dev, "Adapter removed\n");
131 if (test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state))
132 ixgbevf_service_event_schedule(adapter);
133}
134
135static void ixgbevf_check_remove(struct ixgbe_hw *hw, u32 reg)
136{
137 u32 value;
138
139 /* The following check not only optimizes a bit by not
140 * performing a read on the status register when the
141 * register just read was a status register read that
142 * returned IXGBE_FAILED_READ_REG. It also blocks any
143 * potential recursion.
144 */
145 if (reg == IXGBE_VFSTATUS) {
146 ixgbevf_remove_adapter(hw);
147 return;
148 }
149 value = ixgbevf_read_reg(hw, IXGBE_VFSTATUS);
150 if (value == IXGBE_FAILED_READ_REG)
151 ixgbevf_remove_adapter(hw);
152}
153
154u32 ixgbevf_read_reg(struct ixgbe_hw *hw, u32 reg)
155{
156 u8 __iomem *reg_addr = ACCESS_ONCE(hw->hw_addr);
157 u32 value;
158
159 if (IXGBE_REMOVED(reg_addr))
160 return IXGBE_FAILED_READ_REG;
161 value = readl(reg_addr + reg);
162 if (unlikely(value == IXGBE_FAILED_READ_REG))
163 ixgbevf_check_remove(hw, reg);
164 return value;
165}
166
167/**
168 * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors
169 * @adapter: pointer to adapter struct
170 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
171 * @queue: queue to map the corresponding interrupt to
172 * @msix_vector: the vector to map to the corresponding queue
173 **/
174static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction,
175 u8 queue, u8 msix_vector)
176{
177 u32 ivar, index;
178 struct ixgbe_hw *hw = &adapter->hw;
179
180 if (direction == -1) {
181 /* other causes */
182 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
183 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC);
184 ivar &= ~0xFF;
185 ivar |= msix_vector;
186 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar);
187 } else {
188 /* Tx or Rx causes */
189 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
190 index = ((16 * (queue & 1)) + (8 * direction));
191 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1));
192 ivar &= ~(0xFF << index);
193 ivar |= (msix_vector << index);
194 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar);
195 }
196}
197
198static void ixgbevf_unmap_and_free_tx_resource(struct ixgbevf_ring *tx_ring,
199 struct ixgbevf_tx_buffer *tx_buffer)
200{
201 if (tx_buffer->skb) {
202 dev_kfree_skb_any(tx_buffer->skb);
203 if (dma_unmap_len(tx_buffer, len))
204 dma_unmap_single(tx_ring->dev,
205 dma_unmap_addr(tx_buffer, dma),
206 dma_unmap_len(tx_buffer, len),
207 DMA_TO_DEVICE);
208 } else if (dma_unmap_len(tx_buffer, len)) {
209 dma_unmap_page(tx_ring->dev,
210 dma_unmap_addr(tx_buffer, dma),
211 dma_unmap_len(tx_buffer, len),
212 DMA_TO_DEVICE);
213 }
214 tx_buffer->next_to_watch = NULL;
215 tx_buffer->skb = NULL;
216 dma_unmap_len_set(tx_buffer, len, 0);
217 /* tx_buffer must be completely set up in the transmit path */
218}
219
220static u64 ixgbevf_get_tx_completed(struct ixgbevf_ring *ring)
221{
222 return ring->stats.packets;
223}
224
225static u32 ixgbevf_get_tx_pending(struct ixgbevf_ring *ring)
226{
227 struct ixgbevf_adapter *adapter = netdev_priv(ring->netdev);
228 struct ixgbe_hw *hw = &adapter->hw;
229
230 u32 head = IXGBE_READ_REG(hw, IXGBE_VFTDH(ring->reg_idx));
231 u32 tail = IXGBE_READ_REG(hw, IXGBE_VFTDT(ring->reg_idx));
232
233 if (head != tail)
234 return (head < tail) ?
235 tail - head : (tail + ring->count - head);
236
237 return 0;
238}
239
240static inline bool ixgbevf_check_tx_hang(struct ixgbevf_ring *tx_ring)
241{
242 u32 tx_done = ixgbevf_get_tx_completed(tx_ring);
243 u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
244 u32 tx_pending = ixgbevf_get_tx_pending(tx_ring);
245
246 clear_check_for_tx_hang(tx_ring);
247
248 /* Check for a hung queue, but be thorough. This verifies
249 * that a transmit has been completed since the previous
250 * check AND there is at least one packet pending. The
251 * ARMED bit is set to indicate a potential hang.
252 */
253 if ((tx_done_old == tx_done) && tx_pending) {
254 /* make sure it is true for two checks in a row */
255 return test_and_set_bit(__IXGBEVF_HANG_CHECK_ARMED,
256 &tx_ring->state);
257 }
258 /* reset the countdown */
259 clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &tx_ring->state);
260
261 /* update completed stats and continue */
262 tx_ring->tx_stats.tx_done_old = tx_done;
263
264 return false;
265}
266
267static void ixgbevf_tx_timeout_reset(struct ixgbevf_adapter *adapter)
268{
269 /* Do the reset outside of interrupt context */
270 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) {
271 adapter->flags |= IXGBEVF_FLAG_RESET_REQUESTED;
272 ixgbevf_service_event_schedule(adapter);
273 }
274}
275
276/**
277 * ixgbevf_tx_timeout - Respond to a Tx Hang
278 * @netdev: network interface device structure
279 **/
280static void ixgbevf_tx_timeout(struct net_device *netdev)
281{
282 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
283
284 ixgbevf_tx_timeout_reset(adapter);
285}
286
287/**
288 * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes
289 * @q_vector: board private structure
290 * @tx_ring: tx ring to clean
291 **/
292static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector,
293 struct ixgbevf_ring *tx_ring)
294{
295 struct ixgbevf_adapter *adapter = q_vector->adapter;
296 struct ixgbevf_tx_buffer *tx_buffer;
297 union ixgbe_adv_tx_desc *tx_desc;
298 unsigned int total_bytes = 0, total_packets = 0;
299 unsigned int budget = tx_ring->count / 2;
300 unsigned int i = tx_ring->next_to_clean;
301
302 if (test_bit(__IXGBEVF_DOWN, &adapter->state))
303 return true;
304
305 tx_buffer = &tx_ring->tx_buffer_info[i];
306 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
307 i -= tx_ring->count;
308
309 do {
310 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
311
312 /* if next_to_watch is not set then there is no work pending */
313 if (!eop_desc)
314 break;
315
316 /* prevent any other reads prior to eop_desc */
317 read_barrier_depends();
318
319 /* if DD is not set pending work has not been completed */
320 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
321 break;
322
323 /* clear next_to_watch to prevent false hangs */
324 tx_buffer->next_to_watch = NULL;
325
326 /* update the statistics for this packet */
327 total_bytes += tx_buffer->bytecount;
328 total_packets += tx_buffer->gso_segs;
329
330 /* free the skb */
331 dev_kfree_skb_any(tx_buffer->skb);
332
333 /* unmap skb header data */
334 dma_unmap_single(tx_ring->dev,
335 dma_unmap_addr(tx_buffer, dma),
336 dma_unmap_len(tx_buffer, len),
337 DMA_TO_DEVICE);
338
339 /* clear tx_buffer data */
340 tx_buffer->skb = NULL;
341 dma_unmap_len_set(tx_buffer, len, 0);
342
343 /* unmap remaining buffers */
344 while (tx_desc != eop_desc) {
345 tx_buffer++;
346 tx_desc++;
347 i++;
348 if (unlikely(!i)) {
349 i -= tx_ring->count;
350 tx_buffer = tx_ring->tx_buffer_info;
351 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
352 }
353
354 /* unmap any remaining paged data */
355 if (dma_unmap_len(tx_buffer, len)) {
356 dma_unmap_page(tx_ring->dev,
357 dma_unmap_addr(tx_buffer, dma),
358 dma_unmap_len(tx_buffer, len),
359 DMA_TO_DEVICE);
360 dma_unmap_len_set(tx_buffer, len, 0);
361 }
362 }
363
364 /* move us one more past the eop_desc for start of next pkt */
365 tx_buffer++;
366 tx_desc++;
367 i++;
368 if (unlikely(!i)) {
369 i -= tx_ring->count;
370 tx_buffer = tx_ring->tx_buffer_info;
371 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
372 }
373
374 /* issue prefetch for next Tx descriptor */
375 prefetch(tx_desc);
376
377 /* update budget accounting */
378 budget--;
379 } while (likely(budget));
380
381 i += tx_ring->count;
382 tx_ring->next_to_clean = i;
383 u64_stats_update_begin(&tx_ring->syncp);
384 tx_ring->stats.bytes += total_bytes;
385 tx_ring->stats.packets += total_packets;
386 u64_stats_update_end(&tx_ring->syncp);
387 q_vector->tx.total_bytes += total_bytes;
388 q_vector->tx.total_packets += total_packets;
389
390 if (check_for_tx_hang(tx_ring) && ixgbevf_check_tx_hang(tx_ring)) {
391 struct ixgbe_hw *hw = &adapter->hw;
392 union ixgbe_adv_tx_desc *eop_desc;
393
394 eop_desc = tx_ring->tx_buffer_info[i].next_to_watch;
395
396 pr_err("Detected Tx Unit Hang\n"
397 " Tx Queue <%d>\n"
398 " TDH, TDT <%x>, <%x>\n"
399 " next_to_use <%x>\n"
400 " next_to_clean <%x>\n"
401 "tx_buffer_info[next_to_clean]\n"
402 " next_to_watch <%p>\n"
403 " eop_desc->wb.status <%x>\n"
404 " time_stamp <%lx>\n"
405 " jiffies <%lx>\n",
406 tx_ring->queue_index,
407 IXGBE_READ_REG(hw, IXGBE_VFTDH(tx_ring->reg_idx)),
408 IXGBE_READ_REG(hw, IXGBE_VFTDT(tx_ring->reg_idx)),
409 tx_ring->next_to_use, i,
410 eop_desc, (eop_desc ? eop_desc->wb.status : 0),
411 tx_ring->tx_buffer_info[i].time_stamp, jiffies);
412
413 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
414
415 /* schedule immediate reset if we believe we hung */
416 ixgbevf_tx_timeout_reset(adapter);
417
418 return true;
419 }
420
421#define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
422 if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
423 (ixgbevf_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
424 /* Make sure that anybody stopping the queue after this
425 * sees the new next_to_clean.
426 */
427 smp_mb();
428
429 if (__netif_subqueue_stopped(tx_ring->netdev,
430 tx_ring->queue_index) &&
431 !test_bit(__IXGBEVF_DOWN, &adapter->state)) {
432 netif_wake_subqueue(tx_ring->netdev,
433 tx_ring->queue_index);
434 ++tx_ring->tx_stats.restart_queue;
435 }
436 }
437
438 return !!budget;
439}
440
441/**
442 * ixgbevf_rx_skb - Helper function to determine proper Rx method
443 * @q_vector: structure containing interrupt and ring information
444 * @skb: packet to send up
445 **/
446static void ixgbevf_rx_skb(struct ixgbevf_q_vector *q_vector,
447 struct sk_buff *skb)
448{
449#ifdef CONFIG_NET_RX_BUSY_POLL
450 skb_mark_napi_id(skb, &q_vector->napi);
451
452 if (ixgbevf_qv_busy_polling(q_vector)) {
453 netif_receive_skb(skb);
454 /* exit early if we busy polled */
455 return;
456 }
457#endif /* CONFIG_NET_RX_BUSY_POLL */
458
459 napi_gro_receive(&q_vector->napi, skb);
460}
461
462#define IXGBE_RSS_L4_TYPES_MASK \
463 ((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \
464 (1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \
465 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \
466 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP))
467
468static inline void ixgbevf_rx_hash(struct ixgbevf_ring *ring,
469 union ixgbe_adv_rx_desc *rx_desc,
470 struct sk_buff *skb)
471{
472 u16 rss_type;
473
474 if (!(ring->netdev->features & NETIF_F_RXHASH))
475 return;
476
477 rss_type = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.pkt_info) &
478 IXGBE_RXDADV_RSSTYPE_MASK;
479
480 if (!rss_type)
481 return;
482
483 skb_set_hash(skb, le32_to_cpu(rx_desc->wb.lower.hi_dword.rss),
484 (IXGBE_RSS_L4_TYPES_MASK & (1ul << rss_type)) ?
485 PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
486}
487
488/**
489 * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
490 * @ring: structure containig ring specific data
491 * @rx_desc: current Rx descriptor being processed
492 * @skb: skb currently being received and modified
493 **/
494static inline void ixgbevf_rx_checksum(struct ixgbevf_ring *ring,
495 union ixgbe_adv_rx_desc *rx_desc,
496 struct sk_buff *skb)
497{
498 skb_checksum_none_assert(skb);
499
500 /* Rx csum disabled */
501 if (!(ring->netdev->features & NETIF_F_RXCSUM))
502 return;
503
504 /* if IP and error */
505 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) &&
506 ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) {
507 ring->rx_stats.csum_err++;
508 return;
509 }
510
511 if (!ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS))
512 return;
513
514 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) {
515 ring->rx_stats.csum_err++;
516 return;
517 }
518
519 /* It must be a TCP or UDP packet with a valid checksum */
520 skb->ip_summed = CHECKSUM_UNNECESSARY;
521}
522
523/**
524 * ixgbevf_process_skb_fields - Populate skb header fields from Rx descriptor
525 * @rx_ring: rx descriptor ring packet is being transacted on
526 * @rx_desc: pointer to the EOP Rx descriptor
527 * @skb: pointer to current skb being populated
528 *
529 * This function checks the ring, descriptor, and packet information in
530 * order to populate the checksum, VLAN, protocol, and other fields within
531 * the skb.
532 **/
533static void ixgbevf_process_skb_fields(struct ixgbevf_ring *rx_ring,
534 union ixgbe_adv_rx_desc *rx_desc,
535 struct sk_buff *skb)
536{
537 ixgbevf_rx_hash(rx_ring, rx_desc, skb);
538 ixgbevf_rx_checksum(rx_ring, rx_desc, skb);
539
540 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) {
541 u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan);
542 unsigned long *active_vlans = netdev_priv(rx_ring->netdev);
543
544 if (test_bit(vid & VLAN_VID_MASK, active_vlans))
545 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
546 }
547
548 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
549}
550
551/**
552 * ixgbevf_is_non_eop - process handling of non-EOP buffers
553 * @rx_ring: Rx ring being processed
554 * @rx_desc: Rx descriptor for current buffer
555 * @skb: current socket buffer containing buffer in progress
556 *
557 * This function updates next to clean. If the buffer is an EOP buffer
558 * this function exits returning false, otherwise it will place the
559 * sk_buff in the next buffer to be chained and return true indicating
560 * that this is in fact a non-EOP buffer.
561 **/
562static bool ixgbevf_is_non_eop(struct ixgbevf_ring *rx_ring,
563 union ixgbe_adv_rx_desc *rx_desc)
564{
565 u32 ntc = rx_ring->next_to_clean + 1;
566
567 /* fetch, update, and store next to clean */
568 ntc = (ntc < rx_ring->count) ? ntc : 0;
569 rx_ring->next_to_clean = ntc;
570
571 prefetch(IXGBEVF_RX_DESC(rx_ring, ntc));
572
573 if (likely(ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
574 return false;
575
576 return true;
577}
578
579static bool ixgbevf_alloc_mapped_page(struct ixgbevf_ring *rx_ring,
580 struct ixgbevf_rx_buffer *bi)
581{
582 struct page *page = bi->page;
583 dma_addr_t dma = bi->dma;
584
585 /* since we are recycling buffers we should seldom need to alloc */
586 if (likely(page))
587 return true;
588
589 /* alloc new page for storage */
590 page = dev_alloc_page();
591 if (unlikely(!page)) {
592 rx_ring->rx_stats.alloc_rx_page_failed++;
593 return false;
594 }
595
596 /* map page for use */
597 dma = dma_map_page(rx_ring->dev, page, 0,
598 PAGE_SIZE, DMA_FROM_DEVICE);
599
600 /* if mapping failed free memory back to system since
601 * there isn't much point in holding memory we can't use
602 */
603 if (dma_mapping_error(rx_ring->dev, dma)) {
604 __free_page(page);
605
606 rx_ring->rx_stats.alloc_rx_buff_failed++;
607 return false;
608 }
609
610 bi->dma = dma;
611 bi->page = page;
612 bi->page_offset = 0;
613
614 return true;
615}
616
617/**
618 * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
619 * @rx_ring: rx descriptor ring (for a specific queue) to setup buffers on
620 * @cleaned_count: number of buffers to replace
621 **/
622static void ixgbevf_alloc_rx_buffers(struct ixgbevf_ring *rx_ring,
623 u16 cleaned_count)
624{
625 union ixgbe_adv_rx_desc *rx_desc;
626 struct ixgbevf_rx_buffer *bi;
627 unsigned int i = rx_ring->next_to_use;
628
629 /* nothing to do or no valid netdev defined */
630 if (!cleaned_count || !rx_ring->netdev)
631 return;
632
633 rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
634 bi = &rx_ring->rx_buffer_info[i];
635 i -= rx_ring->count;
636
637 do {
638 if (!ixgbevf_alloc_mapped_page(rx_ring, bi))
639 break;
640
641 /* Refresh the desc even if pkt_addr didn't change
642 * because each write-back erases this info.
643 */
644 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);
645
646 rx_desc++;
647 bi++;
648 i++;
649 if (unlikely(!i)) {
650 rx_desc = IXGBEVF_RX_DESC(rx_ring, 0);
651 bi = rx_ring->rx_buffer_info;
652 i -= rx_ring->count;
653 }
654
655 /* clear the hdr_addr for the next_to_use descriptor */
656 rx_desc->read.hdr_addr = 0;
657
658 cleaned_count--;
659 } while (cleaned_count);
660
661 i += rx_ring->count;
662
663 if (rx_ring->next_to_use != i) {
664 /* record the next descriptor to use */
665 rx_ring->next_to_use = i;
666
667 /* update next to alloc since we have filled the ring */
668 rx_ring->next_to_alloc = i;
669
670 /* Force memory writes to complete before letting h/w
671 * know there are new descriptors to fetch. (Only
672 * applicable for weak-ordered memory model archs,
673 * such as IA-64).
674 */
675 wmb();
676 ixgbevf_write_tail(rx_ring, i);
677 }
678}
679
680/**
681 * ixgbevf_cleanup_headers - Correct corrupted or empty headers
682 * @rx_ring: rx descriptor ring packet is being transacted on
683 * @rx_desc: pointer to the EOP Rx descriptor
684 * @skb: pointer to current skb being fixed
685 *
686 * Check for corrupted packet headers caused by senders on the local L2
687 * embedded NIC switch not setting up their Tx Descriptors right. These
688 * should be very rare.
689 *
690 * Also address the case where we are pulling data in on pages only
691 * and as such no data is present in the skb header.
692 *
693 * In addition if skb is not at least 60 bytes we need to pad it so that
694 * it is large enough to qualify as a valid Ethernet frame.
695 *
696 * Returns true if an error was encountered and skb was freed.
697 **/
698static bool ixgbevf_cleanup_headers(struct ixgbevf_ring *rx_ring,
699 union ixgbe_adv_rx_desc *rx_desc,
700 struct sk_buff *skb)
701{
702 /* verify that the packet does not have any known errors */
703 if (unlikely(ixgbevf_test_staterr(rx_desc,
704 IXGBE_RXDADV_ERR_FRAME_ERR_MASK))) {
705 struct net_device *netdev = rx_ring->netdev;
706
707 if (!(netdev->features & NETIF_F_RXALL)) {
708 dev_kfree_skb_any(skb);
709 return true;
710 }
711 }
712
713 /* if eth_skb_pad returns an error the skb was freed */
714 if (eth_skb_pad(skb))
715 return true;
716
717 return false;
718}
719
720/**
721 * ixgbevf_reuse_rx_page - page flip buffer and store it back on the ring
722 * @rx_ring: rx descriptor ring to store buffers on
723 * @old_buff: donor buffer to have page reused
724 *
725 * Synchronizes page for reuse by the adapter
726 **/
727static void ixgbevf_reuse_rx_page(struct ixgbevf_ring *rx_ring,
728 struct ixgbevf_rx_buffer *old_buff)
729{
730 struct ixgbevf_rx_buffer *new_buff;
731 u16 nta = rx_ring->next_to_alloc;
732
733 new_buff = &rx_ring->rx_buffer_info[nta];
734
735 /* update, and store next to alloc */
736 nta++;
737 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
738
739 /* transfer page from old buffer to new buffer */
740 new_buff->page = old_buff->page;
741 new_buff->dma = old_buff->dma;
742 new_buff->page_offset = old_buff->page_offset;
743
744 /* sync the buffer for use by the device */
745 dma_sync_single_range_for_device(rx_ring->dev, new_buff->dma,
746 new_buff->page_offset,
747 IXGBEVF_RX_BUFSZ,
748 DMA_FROM_DEVICE);
749}
750
751static inline bool ixgbevf_page_is_reserved(struct page *page)
752{
753 return (page_to_nid(page) != numa_mem_id()) || page_is_pfmemalloc(page);
754}
755
756/**
757 * ixgbevf_add_rx_frag - Add contents of Rx buffer to sk_buff
758 * @rx_ring: rx descriptor ring to transact packets on
759 * @rx_buffer: buffer containing page to add
760 * @rx_desc: descriptor containing length of buffer written by hardware
761 * @skb: sk_buff to place the data into
762 *
763 * This function will add the data contained in rx_buffer->page to the skb.
764 * This is done either through a direct copy if the data in the buffer is
765 * less than the skb header size, otherwise it will just attach the page as
766 * a frag to the skb.
767 *
768 * The function will then update the page offset if necessary and return
769 * true if the buffer can be reused by the adapter.
770 **/
771static bool ixgbevf_add_rx_frag(struct ixgbevf_ring *rx_ring,
772 struct ixgbevf_rx_buffer *rx_buffer,
773 union ixgbe_adv_rx_desc *rx_desc,
774 struct sk_buff *skb)
775{
776 struct page *page = rx_buffer->page;
777 unsigned char *va = page_address(page) + rx_buffer->page_offset;
778 unsigned int size = le16_to_cpu(rx_desc->wb.upper.length);
779#if (PAGE_SIZE < 8192)
780 unsigned int truesize = IXGBEVF_RX_BUFSZ;
781#else
782 unsigned int truesize = ALIGN(size, L1_CACHE_BYTES);
783#endif
784 unsigned int pull_len;
785
786 if (unlikely(skb_is_nonlinear(skb)))
787 goto add_tail_frag;
788
789 if (likely(size <= IXGBEVF_RX_HDR_SIZE)) {
790 memcpy(__skb_put(skb, size), va, ALIGN(size, sizeof(long)));
791
792 /* page is not reserved, we can reuse buffer as is */
793 if (likely(!ixgbevf_page_is_reserved(page)))
794 return true;
795
796 /* this page cannot be reused so discard it */
797 put_page(page);
798 return false;
799 }
800
801 /* we need the header to contain the greater of either ETH_HLEN or
802 * 60 bytes if the skb->len is less than 60 for skb_pad.
803 */
804 pull_len = eth_get_headlen(va, IXGBEVF_RX_HDR_SIZE);
805
806 /* align pull length to size of long to optimize memcpy performance */
807 memcpy(__skb_put(skb, pull_len), va, ALIGN(pull_len, sizeof(long)));
808
809 /* update all of the pointers */
810 va += pull_len;
811 size -= pull_len;
812
813add_tail_frag:
814 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
815 (unsigned long)va & ~PAGE_MASK, size, truesize);
816
817 /* avoid re-using remote pages */
818 if (unlikely(ixgbevf_page_is_reserved(page)))
819 return false;
820
821#if (PAGE_SIZE < 8192)
822 /* if we are only owner of page we can reuse it */
823 if (unlikely(page_count(page) != 1))
824 return false;
825
826 /* flip page offset to other buffer */
827 rx_buffer->page_offset ^= IXGBEVF_RX_BUFSZ;
828
829#else
830 /* move offset up to the next cache line */
831 rx_buffer->page_offset += truesize;
832
833 if (rx_buffer->page_offset > (PAGE_SIZE - IXGBEVF_RX_BUFSZ))
834 return false;
835
836#endif
837 /* Even if we own the page, we are not allowed to use atomic_set()
838 * This would break get_page_unless_zero() users.
839 */
840 page_ref_inc(page);
841
842 return true;
843}
844
845static struct sk_buff *ixgbevf_fetch_rx_buffer(struct ixgbevf_ring *rx_ring,
846 union ixgbe_adv_rx_desc *rx_desc,
847 struct sk_buff *skb)
848{
849 struct ixgbevf_rx_buffer *rx_buffer;
850 struct page *page;
851
852 rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
853 page = rx_buffer->page;
854 prefetchw(page);
855
856 if (likely(!skb)) {
857 void *page_addr = page_address(page) +
858 rx_buffer->page_offset;
859
860 /* prefetch first cache line of first page */
861 prefetch(page_addr);
862#if L1_CACHE_BYTES < 128
863 prefetch(page_addr + L1_CACHE_BYTES);
864#endif
865
866 /* allocate a skb to store the frags */
867 skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
868 IXGBEVF_RX_HDR_SIZE);
869 if (unlikely(!skb)) {
870 rx_ring->rx_stats.alloc_rx_buff_failed++;
871 return NULL;
872 }
873
874 /* we will be copying header into skb->data in
875 * pskb_may_pull so it is in our interest to prefetch
876 * it now to avoid a possible cache miss
877 */
878 prefetchw(skb->data);
879 }
880
881 /* we are reusing so sync this buffer for CPU use */
882 dma_sync_single_range_for_cpu(rx_ring->dev,
883 rx_buffer->dma,
884 rx_buffer->page_offset,
885 IXGBEVF_RX_BUFSZ,
886 DMA_FROM_DEVICE);
887
888 /* pull page into skb */
889 if (ixgbevf_add_rx_frag(rx_ring, rx_buffer, rx_desc, skb)) {
890 /* hand second half of page back to the ring */
891 ixgbevf_reuse_rx_page(rx_ring, rx_buffer);
892 } else {
893 /* we are not reusing the buffer so unmap it */
894 dma_unmap_page(rx_ring->dev, rx_buffer->dma,
895 PAGE_SIZE, DMA_FROM_DEVICE);
896 }
897
898 /* clear contents of buffer_info */
899 rx_buffer->dma = 0;
900 rx_buffer->page = NULL;
901
902 return skb;
903}
904
905static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter,
906 u32 qmask)
907{
908 struct ixgbe_hw *hw = &adapter->hw;
909
910 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, qmask);
911}
912
913static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
914 struct ixgbevf_ring *rx_ring,
915 int budget)
916{
917 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
918 u16 cleaned_count = ixgbevf_desc_unused(rx_ring);
919 struct sk_buff *skb = rx_ring->skb;
920
921 while (likely(total_rx_packets < budget)) {
922 union ixgbe_adv_rx_desc *rx_desc;
923
924 /* return some buffers to hardware, one at a time is too slow */
925 if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) {
926 ixgbevf_alloc_rx_buffers(rx_ring, cleaned_count);
927 cleaned_count = 0;
928 }
929
930 rx_desc = IXGBEVF_RX_DESC(rx_ring, rx_ring->next_to_clean);
931
932 if (!ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_DD))
933 break;
934
935 /* This memory barrier is needed to keep us from reading
936 * any other fields out of the rx_desc until we know the
937 * RXD_STAT_DD bit is set
938 */
939 rmb();
940
941 /* retrieve a buffer from the ring */
942 skb = ixgbevf_fetch_rx_buffer(rx_ring, rx_desc, skb);
943
944 /* exit if we failed to retrieve a buffer */
945 if (!skb)
946 break;
947
948 cleaned_count++;
949
950 /* fetch next buffer in frame if non-eop */
951 if (ixgbevf_is_non_eop(rx_ring, rx_desc))
952 continue;
953
954 /* verify the packet layout is correct */
955 if (ixgbevf_cleanup_headers(rx_ring, rx_desc, skb)) {
956 skb = NULL;
957 continue;
958 }
959
960 /* probably a little skewed due to removing CRC */
961 total_rx_bytes += skb->len;
962
963 /* Workaround hardware that can't do proper VEPA multicast
964 * source pruning.
965 */
966 if ((skb->pkt_type == PACKET_BROADCAST ||
967 skb->pkt_type == PACKET_MULTICAST) &&
968 ether_addr_equal(rx_ring->netdev->dev_addr,
969 eth_hdr(skb)->h_source)) {
970 dev_kfree_skb_irq(skb);
971 continue;
972 }
973
974 /* populate checksum, VLAN, and protocol */
975 ixgbevf_process_skb_fields(rx_ring, rx_desc, skb);
976
977 ixgbevf_rx_skb(q_vector, skb);
978
979 /* reset skb pointer */
980 skb = NULL;
981
982 /* update budget accounting */
983 total_rx_packets++;
984 }
985
986 /* place incomplete frames back on ring for completion */
987 rx_ring->skb = skb;
988
989 u64_stats_update_begin(&rx_ring->syncp);
990 rx_ring->stats.packets += total_rx_packets;
991 rx_ring->stats.bytes += total_rx_bytes;
992 u64_stats_update_end(&rx_ring->syncp);
993 q_vector->rx.total_packets += total_rx_packets;
994 q_vector->rx.total_bytes += total_rx_bytes;
995
996 return total_rx_packets;
997}
998
999/**
1000 * ixgbevf_poll - NAPI polling calback
1001 * @napi: napi struct with our devices info in it
1002 * @budget: amount of work driver is allowed to do this pass, in packets
1003 *
1004 * This function will clean more than one or more rings associated with a
1005 * q_vector.
1006 **/
1007static int ixgbevf_poll(struct napi_struct *napi, int budget)
1008{
1009 struct ixgbevf_q_vector *q_vector =
1010 container_of(napi, struct ixgbevf_q_vector, napi);
1011 struct ixgbevf_adapter *adapter = q_vector->adapter;
1012 struct ixgbevf_ring *ring;
1013 int per_ring_budget, work_done = 0;
1014 bool clean_complete = true;
1015
1016 ixgbevf_for_each_ring(ring, q_vector->tx)
1017 clean_complete &= ixgbevf_clean_tx_irq(q_vector, ring);
1018
1019 if (budget <= 0)
1020 return budget;
1021#ifdef CONFIG_NET_RX_BUSY_POLL
1022 if (!ixgbevf_qv_lock_napi(q_vector))
1023 return budget;
1024#endif
1025
1026 /* attempt to distribute budget to each queue fairly, but don't allow
1027 * the budget to go below 1 because we'll exit polling
1028 */
1029 if (q_vector->rx.count > 1)
1030 per_ring_budget = max(budget/q_vector->rx.count, 1);
1031 else
1032 per_ring_budget = budget;
1033
1034 ixgbevf_for_each_ring(ring, q_vector->rx) {
1035 int cleaned = ixgbevf_clean_rx_irq(q_vector, ring,
1036 per_ring_budget);
1037 work_done += cleaned;
1038 clean_complete &= (cleaned < per_ring_budget);
1039 }
1040
1041#ifdef CONFIG_NET_RX_BUSY_POLL
1042 ixgbevf_qv_unlock_napi(q_vector);
1043#endif
1044
1045 /* If all work not completed, return budget and keep polling */
1046 if (!clean_complete)
1047 return budget;
1048 /* all work done, exit the polling mode */
1049 napi_complete_done(napi, work_done);
1050 if (adapter->rx_itr_setting == 1)
1051 ixgbevf_set_itr(q_vector);
1052 if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&
1053 !test_bit(__IXGBEVF_REMOVING, &adapter->state))
1054 ixgbevf_irq_enable_queues(adapter,
1055 1 << q_vector->v_idx);
1056
1057 return 0;
1058}
1059
1060/**
1061 * ixgbevf_write_eitr - write VTEITR register in hardware specific way
1062 * @q_vector: structure containing interrupt and ring information
1063 **/
1064void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector)
1065{
1066 struct ixgbevf_adapter *adapter = q_vector->adapter;
1067 struct ixgbe_hw *hw = &adapter->hw;
1068 int v_idx = q_vector->v_idx;
1069 u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
1070
1071 /* set the WDIS bit to not clear the timer bits and cause an
1072 * immediate assertion of the interrupt
1073 */
1074 itr_reg |= IXGBE_EITR_CNT_WDIS;
1075
1076 IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg);
1077}
1078
1079#ifdef CONFIG_NET_RX_BUSY_POLL
1080/* must be called with local_bh_disable()d */
1081static int ixgbevf_busy_poll_recv(struct napi_struct *napi)
1082{
1083 struct ixgbevf_q_vector *q_vector =
1084 container_of(napi, struct ixgbevf_q_vector, napi);
1085 struct ixgbevf_adapter *adapter = q_vector->adapter;
1086 struct ixgbevf_ring *ring;
1087 int found = 0;
1088
1089 if (test_bit(__IXGBEVF_DOWN, &adapter->state))
1090 return LL_FLUSH_FAILED;
1091
1092 if (!ixgbevf_qv_lock_poll(q_vector))
1093 return LL_FLUSH_BUSY;
1094
1095 ixgbevf_for_each_ring(ring, q_vector->rx) {
1096 found = ixgbevf_clean_rx_irq(q_vector, ring, 4);
1097#ifdef BP_EXTENDED_STATS
1098 if (found)
1099 ring->stats.cleaned += found;
1100 else
1101 ring->stats.misses++;
1102#endif
1103 if (found)
1104 break;
1105 }
1106
1107 ixgbevf_qv_unlock_poll(q_vector);
1108
1109 return found;
1110}
1111#endif /* CONFIG_NET_RX_BUSY_POLL */
1112
1113/**
1114 * ixgbevf_configure_msix - Configure MSI-X hardware
1115 * @adapter: board private structure
1116 *
1117 * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
1118 * interrupts.
1119 **/
1120static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter)
1121{
1122 struct ixgbevf_q_vector *q_vector;
1123 int q_vectors, v_idx;
1124
1125 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1126 adapter->eims_enable_mask = 0;
1127
1128 /* Populate the IVAR table and set the ITR values to the
1129 * corresponding register.
1130 */
1131 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1132 struct ixgbevf_ring *ring;
1133
1134 q_vector = adapter->q_vector[v_idx];
1135
1136 ixgbevf_for_each_ring(ring, q_vector->rx)
1137 ixgbevf_set_ivar(adapter, 0, ring->reg_idx, v_idx);
1138
1139 ixgbevf_for_each_ring(ring, q_vector->tx)
1140 ixgbevf_set_ivar(adapter, 1, ring->reg_idx, v_idx);
1141
1142 if (q_vector->tx.ring && !q_vector->rx.ring) {
1143 /* Tx only vector */
1144 if (adapter->tx_itr_setting == 1)
1145 q_vector->itr = IXGBE_12K_ITR;
1146 else
1147 q_vector->itr = adapter->tx_itr_setting;
1148 } else {
1149 /* Rx or Rx/Tx vector */
1150 if (adapter->rx_itr_setting == 1)
1151 q_vector->itr = IXGBE_20K_ITR;
1152 else
1153 q_vector->itr = adapter->rx_itr_setting;
1154 }
1155
1156 /* add q_vector eims value to global eims_enable_mask */
1157 adapter->eims_enable_mask |= 1 << v_idx;
1158
1159 ixgbevf_write_eitr(q_vector);
1160 }
1161
1162 ixgbevf_set_ivar(adapter, -1, 1, v_idx);
1163 /* setup eims_other and add value to global eims_enable_mask */
1164 adapter->eims_other = 1 << v_idx;
1165 adapter->eims_enable_mask |= adapter->eims_other;
1166}
1167
1168enum latency_range {
1169 lowest_latency = 0,
1170 low_latency = 1,
1171 bulk_latency = 2,
1172 latency_invalid = 255
1173};
1174
1175/**
1176 * ixgbevf_update_itr - update the dynamic ITR value based on statistics
1177 * @q_vector: structure containing interrupt and ring information
1178 * @ring_container: structure containing ring performance data
1179 *
1180 * Stores a new ITR value based on packets and byte
1181 * counts during the last interrupt. The advantage of per interrupt
1182 * computation is faster updates and more accurate ITR for the current
1183 * traffic pattern. Constants in this function were computed
1184 * based on theoretical maximum wire speed and thresholds were set based
1185 * on testing data as well as attempting to minimize response time
1186 * while increasing bulk throughput.
1187 **/
1188static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector,
1189 struct ixgbevf_ring_container *ring_container)
1190{
1191 int bytes = ring_container->total_bytes;
1192 int packets = ring_container->total_packets;
1193 u32 timepassed_us;
1194 u64 bytes_perint;
1195 u8 itr_setting = ring_container->itr;
1196
1197 if (packets == 0)
1198 return;
1199
1200 /* simple throttle rate management
1201 * 0-20MB/s lowest (100000 ints/s)
1202 * 20-100MB/s low (20000 ints/s)
1203 * 100-1249MB/s bulk (12000 ints/s)
1204 */
1205 /* what was last interrupt timeslice? */
1206 timepassed_us = q_vector->itr >> 2;
1207 bytes_perint = bytes / timepassed_us; /* bytes/usec */
1208
1209 switch (itr_setting) {
1210 case lowest_latency:
1211 if (bytes_perint > 10)
1212 itr_setting = low_latency;
1213 break;
1214 case low_latency:
1215 if (bytes_perint > 20)
1216 itr_setting = bulk_latency;
1217 else if (bytes_perint <= 10)
1218 itr_setting = lowest_latency;
1219 break;
1220 case bulk_latency:
1221 if (bytes_perint <= 20)
1222 itr_setting = low_latency;
1223 break;
1224 }
1225
1226 /* clear work counters since we have the values we need */
1227 ring_container->total_bytes = 0;
1228 ring_container->total_packets = 0;
1229
1230 /* write updated itr to ring container */
1231 ring_container->itr = itr_setting;
1232}
1233
1234static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector)
1235{
1236 u32 new_itr = q_vector->itr;
1237 u8 current_itr;
1238
1239 ixgbevf_update_itr(q_vector, &q_vector->tx);
1240 ixgbevf_update_itr(q_vector, &q_vector->rx);
1241
1242 current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
1243
1244 switch (current_itr) {
1245 /* counts and packets in update_itr are dependent on these numbers */
1246 case lowest_latency:
1247 new_itr = IXGBE_100K_ITR;
1248 break;
1249 case low_latency:
1250 new_itr = IXGBE_20K_ITR;
1251 break;
1252 case bulk_latency:
1253 new_itr = IXGBE_12K_ITR;
1254 break;
1255 default:
1256 break;
1257 }
1258
1259 if (new_itr != q_vector->itr) {
1260 /* do an exponential smoothing */
1261 new_itr = (10 * new_itr * q_vector->itr) /
1262 ((9 * new_itr) + q_vector->itr);
1263
1264 /* save the algorithm value here */
1265 q_vector->itr = new_itr;
1266
1267 ixgbevf_write_eitr(q_vector);
1268 }
1269}
1270
1271static irqreturn_t ixgbevf_msix_other(int irq, void *data)
1272{
1273 struct ixgbevf_adapter *adapter = data;
1274 struct ixgbe_hw *hw = &adapter->hw;
1275
1276 hw->mac.get_link_status = 1;
1277
1278 ixgbevf_service_event_schedule(adapter);
1279
1280 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_other);
1281
1282 return IRQ_HANDLED;
1283}
1284
1285/**
1286 * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues)
1287 * @irq: unused
1288 * @data: pointer to our q_vector struct for this interrupt vector
1289 **/
1290static irqreturn_t ixgbevf_msix_clean_rings(int irq, void *data)
1291{
1292 struct ixgbevf_q_vector *q_vector = data;
1293
1294 /* EIAM disabled interrupts (on this vector) for us */
1295 if (q_vector->rx.ring || q_vector->tx.ring)
1296 napi_schedule_irqoff(&q_vector->napi);
1297
1298 return IRQ_HANDLED;
1299}
1300
1301static inline void map_vector_to_rxq(struct ixgbevf_adapter *a, int v_idx,
1302 int r_idx)
1303{
1304 struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
1305
1306 a->rx_ring[r_idx]->next = q_vector->rx.ring;
1307 q_vector->rx.ring = a->rx_ring[r_idx];
1308 q_vector->rx.count++;
1309}
1310
1311static inline void map_vector_to_txq(struct ixgbevf_adapter *a, int v_idx,
1312 int t_idx)
1313{
1314 struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
1315
1316 a->tx_ring[t_idx]->next = q_vector->tx.ring;
1317 q_vector->tx.ring = a->tx_ring[t_idx];
1318 q_vector->tx.count++;
1319}
1320
1321/**
1322 * ixgbevf_map_rings_to_vectors - Maps descriptor rings to vectors
1323 * @adapter: board private structure to initialize
1324 *
1325 * This function maps descriptor rings to the queue-specific vectors
1326 * we were allotted through the MSI-X enabling code. Ideally, we'd have
1327 * one vector per ring/queue, but on a constrained vector budget, we
1328 * group the rings as "efficiently" as possible. You would add new
1329 * mapping configurations in here.
1330 **/
1331static int ixgbevf_map_rings_to_vectors(struct ixgbevf_adapter *adapter)
1332{
1333 int q_vectors;
1334 int v_start = 0;
1335 int rxr_idx = 0, txr_idx = 0;
1336 int rxr_remaining = adapter->num_rx_queues;
1337 int txr_remaining = adapter->num_tx_queues;
1338 int i, j;
1339 int rqpv, tqpv;
1340
1341 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1342
1343 /* The ideal configuration...
1344 * We have enough vectors to map one per queue.
1345 */
1346 if (q_vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
1347 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
1348 map_vector_to_rxq(adapter, v_start, rxr_idx);
1349
1350 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
1351 map_vector_to_txq(adapter, v_start, txr_idx);
1352 return 0;
1353 }
1354
1355 /* If we don't have enough vectors for a 1-to-1
1356 * mapping, we'll have to group them so there are
1357 * multiple queues per vector.
1358 */
1359 /* Re-adjusting *qpv takes care of the remainder. */
1360 for (i = v_start; i < q_vectors; i++) {
1361 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
1362 for (j = 0; j < rqpv; j++) {
1363 map_vector_to_rxq(adapter, i, rxr_idx);
1364 rxr_idx++;
1365 rxr_remaining--;
1366 }
1367 }
1368 for (i = v_start; i < q_vectors; i++) {
1369 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
1370 for (j = 0; j < tqpv; j++) {
1371 map_vector_to_txq(adapter, i, txr_idx);
1372 txr_idx++;
1373 txr_remaining--;
1374 }
1375 }
1376
1377 return 0;
1378}
1379
1380/**
1381 * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
1382 * @adapter: board private structure
1383 *
1384 * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
1385 * interrupts from the kernel.
1386 **/
1387static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)
1388{
1389 struct net_device *netdev = adapter->netdev;
1390 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1391 int vector, err;
1392 int ri = 0, ti = 0;
1393
1394 for (vector = 0; vector < q_vectors; vector++) {
1395 struct ixgbevf_q_vector *q_vector = adapter->q_vector[vector];
1396 struct msix_entry *entry = &adapter->msix_entries[vector];
1397
1398 if (q_vector->tx.ring && q_vector->rx.ring) {
1399 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1400 "%s-%s-%d", netdev->name, "TxRx", ri++);
1401 ti++;
1402 } else if (q_vector->rx.ring) {
1403 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1404 "%s-%s-%d", netdev->name, "rx", ri++);
1405 } else if (q_vector->tx.ring) {
1406 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1407 "%s-%s-%d", netdev->name, "tx", ti++);
1408 } else {
1409 /* skip this unused q_vector */
1410 continue;
1411 }
1412 err = request_irq(entry->vector, &ixgbevf_msix_clean_rings, 0,
1413 q_vector->name, q_vector);
1414 if (err) {
1415 hw_dbg(&adapter->hw,
1416 "request_irq failed for MSIX interrupt Error: %d\n",
1417 err);
1418 goto free_queue_irqs;
1419 }
1420 }
1421
1422 err = request_irq(adapter->msix_entries[vector].vector,
1423 &ixgbevf_msix_other, 0, netdev->name, adapter);
1424 if (err) {
1425 hw_dbg(&adapter->hw, "request_irq for msix_other failed: %d\n",
1426 err);
1427 goto free_queue_irqs;
1428 }
1429
1430 return 0;
1431
1432free_queue_irqs:
1433 while (vector) {
1434 vector--;
1435 free_irq(adapter->msix_entries[vector].vector,
1436 adapter->q_vector[vector]);
1437 }
1438 /* This failure is non-recoverable - it indicates the system is
1439 * out of MSIX vector resources and the VF driver cannot run
1440 * without them. Set the number of msix vectors to zero
1441 * indicating that not enough can be allocated. The error
1442 * will be returned to the user indicating device open failed.
1443 * Any further attempts to force the driver to open will also
1444 * fail. The only way to recover is to unload the driver and
1445 * reload it again. If the system has recovered some MSIX
1446 * vectors then it may succeed.
1447 */
1448 adapter->num_msix_vectors = 0;
1449 return err;
1450}
1451
1452static inline void ixgbevf_reset_q_vectors(struct ixgbevf_adapter *adapter)
1453{
1454 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1455
1456 for (i = 0; i < q_vectors; i++) {
1457 struct ixgbevf_q_vector *q_vector = adapter->q_vector[i];
1458
1459 q_vector->rx.ring = NULL;
1460 q_vector->tx.ring = NULL;
1461 q_vector->rx.count = 0;
1462 q_vector->tx.count = 0;
1463 }
1464}
1465
1466/**
1467 * ixgbevf_request_irq - initialize interrupts
1468 * @adapter: board private structure
1469 *
1470 * Attempts to configure interrupts using the best available
1471 * capabilities of the hardware and kernel.
1472 **/
1473static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter)
1474{
1475 int err = ixgbevf_request_msix_irqs(adapter);
1476
1477 if (err)
1478 hw_dbg(&adapter->hw, "request_irq failed, Error %d\n", err);
1479
1480 return err;
1481}
1482
1483static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)
1484{
1485 int i, q_vectors;
1486
1487 q_vectors = adapter->num_msix_vectors;
1488 i = q_vectors - 1;
1489
1490 free_irq(adapter->msix_entries[i].vector, adapter);
1491 i--;
1492
1493 for (; i >= 0; i--) {
1494 /* free only the irqs that were actually requested */
1495 if (!adapter->q_vector[i]->rx.ring &&
1496 !adapter->q_vector[i]->tx.ring)
1497 continue;
1498
1499 free_irq(adapter->msix_entries[i].vector,
1500 adapter->q_vector[i]);
1501 }
1502
1503 ixgbevf_reset_q_vectors(adapter);
1504}
1505
1506/**
1507 * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
1508 * @adapter: board private structure
1509 **/
1510static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter)
1511{
1512 struct ixgbe_hw *hw = &adapter->hw;
1513 int i;
1514
1515 IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, 0);
1516 IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0);
1517 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, 0);
1518
1519 IXGBE_WRITE_FLUSH(hw);
1520
1521 for (i = 0; i < adapter->num_msix_vectors; i++)
1522 synchronize_irq(adapter->msix_entries[i].vector);
1523}
1524
1525/**
1526 * ixgbevf_irq_enable - Enable default interrupt generation settings
1527 * @adapter: board private structure
1528 **/
1529static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter)
1530{
1531 struct ixgbe_hw *hw = &adapter->hw;
1532
1533 IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, adapter->eims_enable_mask);
1534 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, adapter->eims_enable_mask);
1535 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_enable_mask);
1536}
1537
1538/**
1539 * ixgbevf_configure_tx_ring - Configure 82599 VF Tx ring after Reset
1540 * @adapter: board private structure
1541 * @ring: structure containing ring specific data
1542 *
1543 * Configure the Tx descriptor ring after a reset.
1544 **/
1545static void ixgbevf_configure_tx_ring(struct ixgbevf_adapter *adapter,
1546 struct ixgbevf_ring *ring)
1547{
1548 struct ixgbe_hw *hw = &adapter->hw;
1549 u64 tdba = ring->dma;
1550 int wait_loop = 10;
1551 u32 txdctl = IXGBE_TXDCTL_ENABLE;
1552 u8 reg_idx = ring->reg_idx;
1553
1554 /* disable queue to avoid issues while updating state */
1555 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
1556 IXGBE_WRITE_FLUSH(hw);
1557
1558 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(reg_idx), tdba & DMA_BIT_MASK(32));
1559 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(reg_idx), tdba >> 32);
1560 IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(reg_idx),
1561 ring->count * sizeof(union ixgbe_adv_tx_desc));
1562
1563 /* disable head writeback */
1564 IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAH(reg_idx), 0);
1565 IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAL(reg_idx), 0);
1566
1567 /* enable relaxed ordering */
1568 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(reg_idx),
1569 (IXGBE_DCA_TXCTRL_DESC_RRO_EN |
1570 IXGBE_DCA_TXCTRL_DATA_RRO_EN));
1571
1572 /* reset head and tail pointers */
1573 IXGBE_WRITE_REG(hw, IXGBE_VFTDH(reg_idx), 0);
1574 IXGBE_WRITE_REG(hw, IXGBE_VFTDT(reg_idx), 0);
1575 ring->tail = adapter->io_addr + IXGBE_VFTDT(reg_idx);
1576
1577 /* reset ntu and ntc to place SW in sync with hardwdare */
1578 ring->next_to_clean = 0;
1579 ring->next_to_use = 0;
1580
1581 /* In order to avoid issues WTHRESH + PTHRESH should always be equal
1582 * to or less than the number of on chip descriptors, which is
1583 * currently 40.
1584 */
1585 txdctl |= (8 << 16); /* WTHRESH = 8 */
1586
1587 /* Setting PTHRESH to 32 both improves performance */
1588 txdctl |= (1 << 8) | /* HTHRESH = 1 */
1589 32; /* PTHRESH = 32 */
1590
1591 clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &ring->state);
1592
1593 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), txdctl);
1594
1595 /* poll to verify queue is enabled */
1596 do {
1597 usleep_range(1000, 2000);
1598 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(reg_idx));
1599 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
1600 if (!wait_loop)
1601 pr_err("Could not enable Tx Queue %d\n", reg_idx);
1602}
1603
1604/**
1605 * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1606 * @adapter: board private structure
1607 *
1608 * Configure the Tx unit of the MAC after a reset.
1609 **/
1610static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter)
1611{
1612 u32 i;
1613
1614 /* Setup the HW Tx Head and Tail descriptor pointers */
1615 for (i = 0; i < adapter->num_tx_queues; i++)
1616 ixgbevf_configure_tx_ring(adapter, adapter->tx_ring[i]);
1617}
1618
1619#define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1620
1621static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter, int index)
1622{
1623 struct ixgbe_hw *hw = &adapter->hw;
1624 u32 srrctl;
1625
1626 srrctl = IXGBE_SRRCTL_DROP_EN;
1627
1628 srrctl |= IXGBEVF_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT;
1629 srrctl |= IXGBEVF_RX_BUFSZ >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1630 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1631
1632 IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl);
1633}
1634
1635static void ixgbevf_setup_psrtype(struct ixgbevf_adapter *adapter)
1636{
1637 struct ixgbe_hw *hw = &adapter->hw;
1638
1639 /* PSRTYPE must be initialized in 82599 */
1640 u32 psrtype = IXGBE_PSRTYPE_TCPHDR | IXGBE_PSRTYPE_UDPHDR |
1641 IXGBE_PSRTYPE_IPV4HDR | IXGBE_PSRTYPE_IPV6HDR |
1642 IXGBE_PSRTYPE_L2HDR;
1643
1644 if (adapter->num_rx_queues > 1)
1645 psrtype |= 1 << 29;
1646
1647 IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype);
1648}
1649
1650#define IXGBEVF_MAX_RX_DESC_POLL 10
1651static void ixgbevf_disable_rx_queue(struct ixgbevf_adapter *adapter,
1652 struct ixgbevf_ring *ring)
1653{
1654 struct ixgbe_hw *hw = &adapter->hw;
1655 int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1656 u32 rxdctl;
1657 u8 reg_idx = ring->reg_idx;
1658
1659 if (IXGBE_REMOVED(hw->hw_addr))
1660 return;
1661 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1662 rxdctl &= ~IXGBE_RXDCTL_ENABLE;
1663
1664 /* write value back with RXDCTL.ENABLE bit cleared */
1665 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1666
1667 /* the hardware may take up to 100us to really disable the Rx queue */
1668 do {
1669 udelay(10);
1670 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1671 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
1672
1673 if (!wait_loop)
1674 pr_err("RXDCTL.ENABLE queue %d not cleared while polling\n",
1675 reg_idx);
1676}
1677
1678static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter,
1679 struct ixgbevf_ring *ring)
1680{
1681 struct ixgbe_hw *hw = &adapter->hw;
1682 int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1683 u32 rxdctl;
1684 u8 reg_idx = ring->reg_idx;
1685
1686 if (IXGBE_REMOVED(hw->hw_addr))
1687 return;
1688 do {
1689 usleep_range(1000, 2000);
1690 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1691 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
1692
1693 if (!wait_loop)
1694 pr_err("RXDCTL.ENABLE queue %d not set while polling\n",
1695 reg_idx);
1696}
1697
1698static void ixgbevf_setup_vfmrqc(struct ixgbevf_adapter *adapter)
1699{
1700 struct ixgbe_hw *hw = &adapter->hw;
1701 u32 vfmrqc = 0, vfreta = 0;
1702 u16 rss_i = adapter->num_rx_queues;
1703 u8 i, j;
1704
1705 /* Fill out hash function seeds */
1706 netdev_rss_key_fill(adapter->rss_key, sizeof(adapter->rss_key));
1707 for (i = 0; i < IXGBEVF_VFRSSRK_REGS; i++)
1708 IXGBE_WRITE_REG(hw, IXGBE_VFRSSRK(i), adapter->rss_key[i]);
1709
1710 for (i = 0, j = 0; i < IXGBEVF_X550_VFRETA_SIZE; i++, j++) {
1711 if (j == rss_i)
1712 j = 0;
1713
1714 adapter->rss_indir_tbl[i] = j;
1715
1716 vfreta |= j << (i & 0x3) * 8;
1717 if ((i & 3) == 3) {
1718 IXGBE_WRITE_REG(hw, IXGBE_VFRETA(i >> 2), vfreta);
1719 vfreta = 0;
1720 }
1721 }
1722
1723 /* Perform hash on these packet types */
1724 vfmrqc |= IXGBE_VFMRQC_RSS_FIELD_IPV4 |
1725 IXGBE_VFMRQC_RSS_FIELD_IPV4_TCP |
1726 IXGBE_VFMRQC_RSS_FIELD_IPV6 |
1727 IXGBE_VFMRQC_RSS_FIELD_IPV6_TCP;
1728
1729 vfmrqc |= IXGBE_VFMRQC_RSSEN;
1730
1731 IXGBE_WRITE_REG(hw, IXGBE_VFMRQC, vfmrqc);
1732}
1733
1734static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter *adapter,
1735 struct ixgbevf_ring *ring)
1736{
1737 struct ixgbe_hw *hw = &adapter->hw;
1738 u64 rdba = ring->dma;
1739 u32 rxdctl;
1740 u8 reg_idx = ring->reg_idx;
1741
1742 /* disable queue to avoid issues while updating state */
1743 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1744 ixgbevf_disable_rx_queue(adapter, ring);
1745
1746 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(reg_idx), rdba & DMA_BIT_MASK(32));
1747 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(reg_idx), rdba >> 32);
1748 IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(reg_idx),
1749 ring->count * sizeof(union ixgbe_adv_rx_desc));
1750
1751 /* enable relaxed ordering */
1752 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),
1753 IXGBE_DCA_RXCTRL_DESC_RRO_EN);
1754
1755 /* reset head and tail pointers */
1756 IXGBE_WRITE_REG(hw, IXGBE_VFRDH(reg_idx), 0);
1757 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(reg_idx), 0);
1758 ring->tail = adapter->io_addr + IXGBE_VFRDT(reg_idx);
1759
1760 /* reset ntu and ntc to place SW in sync with hardwdare */
1761 ring->next_to_clean = 0;
1762 ring->next_to_use = 0;
1763 ring->next_to_alloc = 0;
1764
1765 ixgbevf_configure_srrctl(adapter, reg_idx);
1766
1767 /* allow any size packet since we can handle overflow */
1768 rxdctl &= ~IXGBE_RXDCTL_RLPML_EN;
1769
1770 rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME;
1771 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1772
1773 ixgbevf_rx_desc_queue_enable(adapter, ring);
1774 ixgbevf_alloc_rx_buffers(ring, ixgbevf_desc_unused(ring));
1775}
1776
1777/**
1778 * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
1779 * @adapter: board private structure
1780 *
1781 * Configure the Rx unit of the MAC after a reset.
1782 **/
1783static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)
1784{
1785 int i;
1786 struct ixgbe_hw *hw = &adapter->hw;
1787 struct net_device *netdev = adapter->netdev;
1788
1789 ixgbevf_setup_psrtype(adapter);
1790 if (hw->mac.type >= ixgbe_mac_X550_vf)
1791 ixgbevf_setup_vfmrqc(adapter);
1792
1793 /* notify the PF of our intent to use this size of frame */
1794 ixgbevf_rlpml_set_vf(hw, netdev->mtu + ETH_HLEN + ETH_FCS_LEN);
1795
1796 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1797 * the Base and Length of the Rx Descriptor Ring
1798 */
1799 for (i = 0; i < adapter->num_rx_queues; i++)
1800 ixgbevf_configure_rx_ring(adapter, adapter->rx_ring[i]);
1801}
1802
1803static int ixgbevf_vlan_rx_add_vid(struct net_device *netdev,
1804 __be16 proto, u16 vid)
1805{
1806 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1807 struct ixgbe_hw *hw = &adapter->hw;
1808 int err;
1809
1810 spin_lock_bh(&adapter->mbx_lock);
1811
1812 /* add VID to filter table */
1813 err = hw->mac.ops.set_vfta(hw, vid, 0, true);
1814
1815 spin_unlock_bh(&adapter->mbx_lock);
1816
1817 /* translate error return types so error makes sense */
1818 if (err == IXGBE_ERR_MBX)
1819 return -EIO;
1820
1821 if (err == IXGBE_ERR_INVALID_ARGUMENT)
1822 return -EACCES;
1823
1824 set_bit(vid, adapter->active_vlans);
1825
1826 return err;
1827}
1828
1829static int ixgbevf_vlan_rx_kill_vid(struct net_device *netdev,
1830 __be16 proto, u16 vid)
1831{
1832 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1833 struct ixgbe_hw *hw = &adapter->hw;
1834 int err;
1835
1836 spin_lock_bh(&adapter->mbx_lock);
1837
1838 /* remove VID from filter table */
1839 err = hw->mac.ops.set_vfta(hw, vid, 0, false);
1840
1841 spin_unlock_bh(&adapter->mbx_lock);
1842
1843 clear_bit(vid, adapter->active_vlans);
1844
1845 return err;
1846}
1847
1848static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter)
1849{
1850 u16 vid;
1851
1852 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1853 ixgbevf_vlan_rx_add_vid(adapter->netdev,
1854 htons(ETH_P_8021Q), vid);
1855}
1856
1857static int ixgbevf_write_uc_addr_list(struct net_device *netdev)
1858{
1859 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1860 struct ixgbe_hw *hw = &adapter->hw;
1861 int count = 0;
1862
1863 if ((netdev_uc_count(netdev)) > 10) {
1864 pr_err("Too many unicast filters - No Space\n");
1865 return -ENOSPC;
1866 }
1867
1868 if (!netdev_uc_empty(netdev)) {
1869 struct netdev_hw_addr *ha;
1870
1871 netdev_for_each_uc_addr(ha, netdev) {
1872 hw->mac.ops.set_uc_addr(hw, ++count, ha->addr);
1873 udelay(200);
1874 }
1875 } else {
1876 /* If the list is empty then send message to PF driver to
1877 * clear all MAC VLANs on this VF.
1878 */
1879 hw->mac.ops.set_uc_addr(hw, 0, NULL);
1880 }
1881
1882 return count;
1883}
1884
1885/**
1886 * ixgbevf_set_rx_mode - Multicast and unicast set
1887 * @netdev: network interface device structure
1888 *
1889 * The set_rx_method entry point is called whenever the multicast address
1890 * list, unicast address list or the network interface flags are updated.
1891 * This routine is responsible for configuring the hardware for proper
1892 * multicast mode and configuring requested unicast filters.
1893 **/
1894static void ixgbevf_set_rx_mode(struct net_device *netdev)
1895{
1896 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1897 struct ixgbe_hw *hw = &adapter->hw;
1898 unsigned int flags = netdev->flags;
1899 int xcast_mode;
1900
1901 xcast_mode = (flags & IFF_ALLMULTI) ? IXGBEVF_XCAST_MODE_ALLMULTI :
1902 (flags & (IFF_BROADCAST | IFF_MULTICAST)) ?
1903 IXGBEVF_XCAST_MODE_MULTI : IXGBEVF_XCAST_MODE_NONE;
1904
1905 spin_lock_bh(&adapter->mbx_lock);
1906
1907 hw->mac.ops.update_xcast_mode(hw, netdev, xcast_mode);
1908
1909 /* reprogram multicast list */
1910 hw->mac.ops.update_mc_addr_list(hw, netdev);
1911
1912 ixgbevf_write_uc_addr_list(netdev);
1913
1914 spin_unlock_bh(&adapter->mbx_lock);
1915}
1916
1917static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter)
1918{
1919 int q_idx;
1920 struct ixgbevf_q_vector *q_vector;
1921 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1922
1923 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1924 q_vector = adapter->q_vector[q_idx];
1925#ifdef CONFIG_NET_RX_BUSY_POLL
1926 ixgbevf_qv_init_lock(adapter->q_vector[q_idx]);
1927#endif
1928 napi_enable(&q_vector->napi);
1929 }
1930}
1931
1932static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter)
1933{
1934 int q_idx;
1935 struct ixgbevf_q_vector *q_vector;
1936 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1937
1938 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1939 q_vector = adapter->q_vector[q_idx];
1940 napi_disable(&q_vector->napi);
1941#ifdef CONFIG_NET_RX_BUSY_POLL
1942 while (!ixgbevf_qv_disable(adapter->q_vector[q_idx])) {
1943 pr_info("QV %d locked\n", q_idx);
1944 usleep_range(1000, 20000);
1945 }
1946#endif /* CONFIG_NET_RX_BUSY_POLL */
1947 }
1948}
1949
1950static int ixgbevf_configure_dcb(struct ixgbevf_adapter *adapter)
1951{
1952 struct ixgbe_hw *hw = &adapter->hw;
1953 unsigned int def_q = 0;
1954 unsigned int num_tcs = 0;
1955 unsigned int num_rx_queues = adapter->num_rx_queues;
1956 unsigned int num_tx_queues = adapter->num_tx_queues;
1957 int err;
1958
1959 spin_lock_bh(&adapter->mbx_lock);
1960
1961 /* fetch queue configuration from the PF */
1962 err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
1963
1964 spin_unlock_bh(&adapter->mbx_lock);
1965
1966 if (err)
1967 return err;
1968
1969 if (num_tcs > 1) {
1970 /* we need only one Tx queue */
1971 num_tx_queues = 1;
1972
1973 /* update default Tx ring register index */
1974 adapter->tx_ring[0]->reg_idx = def_q;
1975
1976 /* we need as many queues as traffic classes */
1977 num_rx_queues = num_tcs;
1978 }
1979
1980 /* if we have a bad config abort request queue reset */
1981 if ((adapter->num_rx_queues != num_rx_queues) ||
1982 (adapter->num_tx_queues != num_tx_queues)) {
1983 /* force mailbox timeout to prevent further messages */
1984 hw->mbx.timeout = 0;
1985
1986 /* wait for watchdog to come around and bail us out */
1987 adapter->flags |= IXGBEVF_FLAG_QUEUE_RESET_REQUESTED;
1988 }
1989
1990 return 0;
1991}
1992
1993static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
1994{
1995 ixgbevf_configure_dcb(adapter);
1996
1997 ixgbevf_set_rx_mode(adapter->netdev);
1998
1999 ixgbevf_restore_vlan(adapter);
2000
2001 ixgbevf_configure_tx(adapter);
2002 ixgbevf_configure_rx(adapter);
2003}
2004
2005static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter)
2006{
2007 /* Only save pre-reset stats if there are some */
2008 if (adapter->stats.vfgprc || adapter->stats.vfgptc) {
2009 adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc -
2010 adapter->stats.base_vfgprc;
2011 adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc -
2012 adapter->stats.base_vfgptc;
2013 adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc -
2014 adapter->stats.base_vfgorc;
2015 adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc -
2016 adapter->stats.base_vfgotc;
2017 adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc -
2018 adapter->stats.base_vfmprc;
2019 }
2020}
2021
2022static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
2023{
2024 struct ixgbe_hw *hw = &adapter->hw;
2025
2026 adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC);
2027 adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB);
2028 adapter->stats.last_vfgorc |=
2029 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32);
2030 adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC);
2031 adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB);
2032 adapter->stats.last_vfgotc |=
2033 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32);
2034 adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC);
2035
2036 adapter->stats.base_vfgprc = adapter->stats.last_vfgprc;
2037 adapter->stats.base_vfgorc = adapter->stats.last_vfgorc;
2038 adapter->stats.base_vfgptc = adapter->stats.last_vfgptc;
2039 adapter->stats.base_vfgotc = adapter->stats.last_vfgotc;
2040 adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;
2041}
2042
2043static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
2044{
2045 struct ixgbe_hw *hw = &adapter->hw;
2046 int api[] = { ixgbe_mbox_api_12,
2047 ixgbe_mbox_api_11,
2048 ixgbe_mbox_api_10,
2049 ixgbe_mbox_api_unknown };
2050 int err, idx = 0;
2051
2052 spin_lock_bh(&adapter->mbx_lock);
2053
2054 while (api[idx] != ixgbe_mbox_api_unknown) {
2055 err = ixgbevf_negotiate_api_version(hw, api[idx]);
2056 if (!err)
2057 break;
2058 idx++;
2059 }
2060
2061 spin_unlock_bh(&adapter->mbx_lock);
2062}
2063
2064static void ixgbevf_up_complete(struct ixgbevf_adapter *adapter)
2065{
2066 struct net_device *netdev = adapter->netdev;
2067 struct ixgbe_hw *hw = &adapter->hw;
2068
2069 ixgbevf_configure_msix(adapter);
2070
2071 spin_lock_bh(&adapter->mbx_lock);
2072
2073 if (is_valid_ether_addr(hw->mac.addr))
2074 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
2075 else
2076 hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0);
2077
2078 spin_unlock_bh(&adapter->mbx_lock);
2079
2080 smp_mb__before_atomic();
2081 clear_bit(__IXGBEVF_DOWN, &adapter->state);
2082 ixgbevf_napi_enable_all(adapter);
2083
2084 /* clear any pending interrupts, may auto mask */
2085 IXGBE_READ_REG(hw, IXGBE_VTEICR);
2086 ixgbevf_irq_enable(adapter);
2087
2088 /* enable transmits */
2089 netif_tx_start_all_queues(netdev);
2090
2091 ixgbevf_save_reset_stats(adapter);
2092 ixgbevf_init_last_counter_stats(adapter);
2093
2094 hw->mac.get_link_status = 1;
2095 mod_timer(&adapter->service_timer, jiffies);
2096}
2097
2098void ixgbevf_up(struct ixgbevf_adapter *adapter)
2099{
2100 ixgbevf_configure(adapter);
2101
2102 ixgbevf_up_complete(adapter);
2103}
2104
2105/**
2106 * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
2107 * @rx_ring: ring to free buffers from
2108 **/
2109static void ixgbevf_clean_rx_ring(struct ixgbevf_ring *rx_ring)
2110{
2111 struct device *dev = rx_ring->dev;
2112 unsigned long size;
2113 unsigned int i;
2114
2115 /* Free Rx ring sk_buff */
2116 if (rx_ring->skb) {
2117 dev_kfree_skb(rx_ring->skb);
2118 rx_ring->skb = NULL;
2119 }
2120
2121 /* ring already cleared, nothing to do */
2122 if (!rx_ring->rx_buffer_info)
2123 return;
2124
2125 /* Free all the Rx ring pages */
2126 for (i = 0; i < rx_ring->count; i++) {
2127 struct ixgbevf_rx_buffer *rx_buffer;
2128
2129 rx_buffer = &rx_ring->rx_buffer_info[i];
2130 if (rx_buffer->dma)
2131 dma_unmap_page(dev, rx_buffer->dma,
2132 PAGE_SIZE, DMA_FROM_DEVICE);
2133 rx_buffer->dma = 0;
2134 if (rx_buffer->page)
2135 __free_page(rx_buffer->page);
2136 rx_buffer->page = NULL;
2137 }
2138
2139 size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
2140 memset(rx_ring->rx_buffer_info, 0, size);
2141
2142 /* Zero out the descriptor ring */
2143 memset(rx_ring->desc, 0, rx_ring->size);
2144}
2145
2146/**
2147 * ixgbevf_clean_tx_ring - Free Tx Buffers
2148 * @tx_ring: ring to be cleaned
2149 **/
2150static void ixgbevf_clean_tx_ring(struct ixgbevf_ring *tx_ring)
2151{
2152 struct ixgbevf_tx_buffer *tx_buffer_info;
2153 unsigned long size;
2154 unsigned int i;
2155
2156 if (!tx_ring->tx_buffer_info)
2157 return;
2158
2159 /* Free all the Tx ring sk_buffs */
2160 for (i = 0; i < tx_ring->count; i++) {
2161 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2162 ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
2163 }
2164
2165 size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
2166 memset(tx_ring->tx_buffer_info, 0, size);
2167
2168 memset(tx_ring->desc, 0, tx_ring->size);
2169}
2170
2171/**
2172 * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
2173 * @adapter: board private structure
2174 **/
2175static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter)
2176{
2177 int i;
2178
2179 for (i = 0; i < adapter->num_rx_queues; i++)
2180 ixgbevf_clean_rx_ring(adapter->rx_ring[i]);
2181}
2182
2183/**
2184 * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
2185 * @adapter: board private structure
2186 **/
2187static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter)
2188{
2189 int i;
2190
2191 for (i = 0; i < adapter->num_tx_queues; i++)
2192 ixgbevf_clean_tx_ring(adapter->tx_ring[i]);
2193}
2194
2195void ixgbevf_down(struct ixgbevf_adapter *adapter)
2196{
2197 struct net_device *netdev = adapter->netdev;
2198 struct ixgbe_hw *hw = &adapter->hw;
2199 int i;
2200
2201 /* signal that we are down to the interrupt handler */
2202 if (test_and_set_bit(__IXGBEVF_DOWN, &adapter->state))
2203 return; /* do nothing if already down */
2204
2205 /* disable all enabled Rx queues */
2206 for (i = 0; i < adapter->num_rx_queues; i++)
2207 ixgbevf_disable_rx_queue(adapter, adapter->rx_ring[i]);
2208
2209 usleep_range(10000, 20000);
2210
2211 netif_tx_stop_all_queues(netdev);
2212
2213 /* call carrier off first to avoid false dev_watchdog timeouts */
2214 netif_carrier_off(netdev);
2215 netif_tx_disable(netdev);
2216
2217 ixgbevf_irq_disable(adapter);
2218
2219 ixgbevf_napi_disable_all(adapter);
2220
2221 del_timer_sync(&adapter->service_timer);
2222
2223 /* disable transmits in the hardware now that interrupts are off */
2224 for (i = 0; i < adapter->num_tx_queues; i++) {
2225 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
2226
2227 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx),
2228 IXGBE_TXDCTL_SWFLSH);
2229 }
2230
2231 if (!pci_channel_offline(adapter->pdev))
2232 ixgbevf_reset(adapter);
2233
2234 ixgbevf_clean_all_tx_rings(adapter);
2235 ixgbevf_clean_all_rx_rings(adapter);
2236}
2237
2238void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)
2239{
2240 WARN_ON(in_interrupt());
2241
2242 while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
2243 msleep(1);
2244
2245 ixgbevf_down(adapter);
2246 ixgbevf_up(adapter);
2247
2248 clear_bit(__IXGBEVF_RESETTING, &adapter->state);
2249}
2250
2251void ixgbevf_reset(struct ixgbevf_adapter *adapter)
2252{
2253 struct ixgbe_hw *hw = &adapter->hw;
2254 struct net_device *netdev = adapter->netdev;
2255
2256 if (hw->mac.ops.reset_hw(hw)) {
2257 hw_dbg(hw, "PF still resetting\n");
2258 } else {
2259 hw->mac.ops.init_hw(hw);
2260 ixgbevf_negotiate_api(adapter);
2261 }
2262
2263 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
2264 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2265 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2266 }
2267
2268 adapter->last_reset = jiffies;
2269}
2270
2271static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter,
2272 int vectors)
2273{
2274 int vector_threshold;
2275
2276 /* We'll want at least 2 (vector_threshold):
2277 * 1) TxQ[0] + RxQ[0] handler
2278 * 2) Other (Link Status Change, etc.)
2279 */
2280 vector_threshold = MIN_MSIX_COUNT;
2281
2282 /* The more we get, the more we will assign to Tx/Rx Cleanup
2283 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
2284 * Right now, we simply care about how many we'll get; we'll
2285 * set them up later while requesting irq's.
2286 */
2287 vectors = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
2288 vector_threshold, vectors);
2289
2290 if (vectors < 0) {
2291 dev_err(&adapter->pdev->dev,
2292 "Unable to allocate MSI-X interrupts\n");
2293 kfree(adapter->msix_entries);
2294 adapter->msix_entries = NULL;
2295 return vectors;
2296 }
2297
2298 /* Adjust for only the vectors we'll use, which is minimum
2299 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
2300 * vectors we were allocated.
2301 */
2302 adapter->num_msix_vectors = vectors;
2303
2304 return 0;
2305}
2306
2307/**
2308 * ixgbevf_set_num_queues - Allocate queues for device, feature dependent
2309 * @adapter: board private structure to initialize
2310 *
2311 * This is the top level queue allocation routine. The order here is very
2312 * important, starting with the "most" number of features turned on at once,
2313 * and ending with the smallest set of features. This way large combinations
2314 * can be allocated if they're turned on, and smaller combinations are the
2315 * fallthrough conditions.
2316 *
2317 **/
2318static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
2319{
2320 struct ixgbe_hw *hw = &adapter->hw;
2321 unsigned int def_q = 0;
2322 unsigned int num_tcs = 0;
2323 int err;
2324
2325 /* Start with base case */
2326 adapter->num_rx_queues = 1;
2327 adapter->num_tx_queues = 1;
2328
2329 spin_lock_bh(&adapter->mbx_lock);
2330
2331 /* fetch queue configuration from the PF */
2332 err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
2333
2334 spin_unlock_bh(&adapter->mbx_lock);
2335
2336 if (err)
2337 return;
2338
2339 /* we need as many queues as traffic classes */
2340 if (num_tcs > 1) {
2341 adapter->num_rx_queues = num_tcs;
2342 } else {
2343 u16 rss = min_t(u16, num_online_cpus(), IXGBEVF_MAX_RSS_QUEUES);
2344
2345 switch (hw->api_version) {
2346 case ixgbe_mbox_api_11:
2347 case ixgbe_mbox_api_12:
2348 adapter->num_rx_queues = rss;
2349 adapter->num_tx_queues = rss;
2350 default:
2351 break;
2352 }
2353 }
2354}
2355
2356/**
2357 * ixgbevf_alloc_queues - Allocate memory for all rings
2358 * @adapter: board private structure to initialize
2359 *
2360 * We allocate one ring per queue at run-time since we don't know the
2361 * number of queues at compile-time. The polling_netdev array is
2362 * intended for Multiqueue, but should work fine with a single queue.
2363 **/
2364static int ixgbevf_alloc_queues(struct ixgbevf_adapter *adapter)
2365{
2366 struct ixgbevf_ring *ring;
2367 int rx = 0, tx = 0;
2368
2369 for (; tx < adapter->num_tx_queues; tx++) {
2370 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
2371 if (!ring)
2372 goto err_allocation;
2373
2374 ring->dev = &adapter->pdev->dev;
2375 ring->netdev = adapter->netdev;
2376 ring->count = adapter->tx_ring_count;
2377 ring->queue_index = tx;
2378 ring->reg_idx = tx;
2379
2380 adapter->tx_ring[tx] = ring;
2381 }
2382
2383 for (; rx < adapter->num_rx_queues; rx++) {
2384 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
2385 if (!ring)
2386 goto err_allocation;
2387
2388 ring->dev = &adapter->pdev->dev;
2389 ring->netdev = adapter->netdev;
2390
2391 ring->count = adapter->rx_ring_count;
2392 ring->queue_index = rx;
2393 ring->reg_idx = rx;
2394
2395 adapter->rx_ring[rx] = ring;
2396 }
2397
2398 return 0;
2399
2400err_allocation:
2401 while (tx) {
2402 kfree(adapter->tx_ring[--tx]);
2403 adapter->tx_ring[tx] = NULL;
2404 }
2405
2406 while (rx) {
2407 kfree(adapter->rx_ring[--rx]);
2408 adapter->rx_ring[rx] = NULL;
2409 }
2410 return -ENOMEM;
2411}
2412
2413/**
2414 * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
2415 * @adapter: board private structure to initialize
2416 *
2417 * Attempt to configure the interrupts using the best available
2418 * capabilities of the hardware and the kernel.
2419 **/
2420static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter)
2421{
2422 struct net_device *netdev = adapter->netdev;
2423 int err;
2424 int vector, v_budget;
2425
2426 /* It's easy to be greedy for MSI-X vectors, but it really
2427 * doesn't do us much good if we have a lot more vectors
2428 * than CPU's. So let's be conservative and only ask for
2429 * (roughly) the same number of vectors as there are CPU's.
2430 * The default is to use pairs of vectors.
2431 */
2432 v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);
2433 v_budget = min_t(int, v_budget, num_online_cpus());
2434 v_budget += NON_Q_VECTORS;
2435
2436 /* A failure in MSI-X entry allocation isn't fatal, but it does
2437 * mean we disable MSI-X capabilities of the adapter.
2438 */
2439 adapter->msix_entries = kcalloc(v_budget,
2440 sizeof(struct msix_entry), GFP_KERNEL);
2441 if (!adapter->msix_entries)
2442 return -ENOMEM;
2443
2444 for (vector = 0; vector < v_budget; vector++)
2445 adapter->msix_entries[vector].entry = vector;
2446
2447 err = ixgbevf_acquire_msix_vectors(adapter, v_budget);
2448 if (err)
2449 return err;
2450
2451 err = netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues);
2452 if (err)
2453 return err;
2454
2455 return netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues);
2456}
2457
2458/**
2459 * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
2460 * @adapter: board private structure to initialize
2461 *
2462 * We allocate one q_vector per queue interrupt. If allocation fails we
2463 * return -ENOMEM.
2464 **/
2465static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)
2466{
2467 int q_idx, num_q_vectors;
2468 struct ixgbevf_q_vector *q_vector;
2469
2470 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2471
2472 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
2473 q_vector = kzalloc(sizeof(struct ixgbevf_q_vector), GFP_KERNEL);
2474 if (!q_vector)
2475 goto err_out;
2476 q_vector->adapter = adapter;
2477 q_vector->v_idx = q_idx;
2478 netif_napi_add(adapter->netdev, &q_vector->napi,
2479 ixgbevf_poll, 64);
2480 adapter->q_vector[q_idx] = q_vector;
2481 }
2482
2483 return 0;
2484
2485err_out:
2486 while (q_idx) {
2487 q_idx--;
2488 q_vector = adapter->q_vector[q_idx];
2489#ifdef CONFIG_NET_RX_BUSY_POLL
2490 napi_hash_del(&q_vector->napi);
2491#endif
2492 netif_napi_del(&q_vector->napi);
2493 kfree(q_vector);
2494 adapter->q_vector[q_idx] = NULL;
2495 }
2496 return -ENOMEM;
2497}
2498
2499/**
2500 * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
2501 * @adapter: board private structure to initialize
2502 *
2503 * This function frees the memory allocated to the q_vectors. In addition if
2504 * NAPI is enabled it will delete any references to the NAPI struct prior
2505 * to freeing the q_vector.
2506 **/
2507static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter)
2508{
2509 int q_idx, num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2510
2511 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
2512 struct ixgbevf_q_vector *q_vector = adapter->q_vector[q_idx];
2513
2514 adapter->q_vector[q_idx] = NULL;
2515#ifdef CONFIG_NET_RX_BUSY_POLL
2516 napi_hash_del(&q_vector->napi);
2517#endif
2518 netif_napi_del(&q_vector->napi);
2519 kfree(q_vector);
2520 }
2521}
2522
2523/**
2524 * ixgbevf_reset_interrupt_capability - Reset MSIX setup
2525 * @adapter: board private structure
2526 *
2527 **/
2528static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter)
2529{
2530 pci_disable_msix(adapter->pdev);
2531 kfree(adapter->msix_entries);
2532 adapter->msix_entries = NULL;
2533}
2534
2535/**
2536 * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
2537 * @adapter: board private structure to initialize
2538 *
2539 **/
2540static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter)
2541{
2542 int err;
2543
2544 /* Number of supported queues */
2545 ixgbevf_set_num_queues(adapter);
2546
2547 err = ixgbevf_set_interrupt_capability(adapter);
2548 if (err) {
2549 hw_dbg(&adapter->hw,
2550 "Unable to setup interrupt capabilities\n");
2551 goto err_set_interrupt;
2552 }
2553
2554 err = ixgbevf_alloc_q_vectors(adapter);
2555 if (err) {
2556 hw_dbg(&adapter->hw, "Unable to allocate memory for queue vectors\n");
2557 goto err_alloc_q_vectors;
2558 }
2559
2560 err = ixgbevf_alloc_queues(adapter);
2561 if (err) {
2562 pr_err("Unable to allocate memory for queues\n");
2563 goto err_alloc_queues;
2564 }
2565
2566 hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u\n",
2567 (adapter->num_rx_queues > 1) ? "Enabled" :
2568 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
2569
2570 set_bit(__IXGBEVF_DOWN, &adapter->state);
2571
2572 return 0;
2573err_alloc_queues:
2574 ixgbevf_free_q_vectors(adapter);
2575err_alloc_q_vectors:
2576 ixgbevf_reset_interrupt_capability(adapter);
2577err_set_interrupt:
2578 return err;
2579}
2580
2581/**
2582 * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings
2583 * @adapter: board private structure to clear interrupt scheme on
2584 *
2585 * We go through and clear interrupt specific resources and reset the structure
2586 * to pre-load conditions
2587 **/
2588static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter)
2589{
2590 int i;
2591
2592 for (i = 0; i < adapter->num_tx_queues; i++) {
2593 kfree(adapter->tx_ring[i]);
2594 adapter->tx_ring[i] = NULL;
2595 }
2596 for (i = 0; i < adapter->num_rx_queues; i++) {
2597 kfree(adapter->rx_ring[i]);
2598 adapter->rx_ring[i] = NULL;
2599 }
2600
2601 adapter->num_tx_queues = 0;
2602 adapter->num_rx_queues = 0;
2603
2604 ixgbevf_free_q_vectors(adapter);
2605 ixgbevf_reset_interrupt_capability(adapter);
2606}
2607
2608/**
2609 * ixgbevf_sw_init - Initialize general software structures
2610 * @adapter: board private structure to initialize
2611 *
2612 * ixgbevf_sw_init initializes the Adapter private data structure.
2613 * Fields are initialized based on PCI device information and
2614 * OS network device settings (MTU size).
2615 **/
2616static int ixgbevf_sw_init(struct ixgbevf_adapter *adapter)
2617{
2618 struct ixgbe_hw *hw = &adapter->hw;
2619 struct pci_dev *pdev = adapter->pdev;
2620 struct net_device *netdev = adapter->netdev;
2621 int err;
2622
2623 /* PCI config space info */
2624 hw->vendor_id = pdev->vendor;
2625 hw->device_id = pdev->device;
2626 hw->revision_id = pdev->revision;
2627 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2628 hw->subsystem_device_id = pdev->subsystem_device;
2629
2630 hw->mbx.ops.init_params(hw);
2631
2632 /* assume legacy case in which PF would only give VF 2 queues */
2633 hw->mac.max_tx_queues = 2;
2634 hw->mac.max_rx_queues = 2;
2635
2636 /* lock to protect mailbox accesses */
2637 spin_lock_init(&adapter->mbx_lock);
2638
2639 err = hw->mac.ops.reset_hw(hw);
2640 if (err) {
2641 dev_info(&pdev->dev,
2642 "PF still in reset state. Is the PF interface up?\n");
2643 } else {
2644 err = hw->mac.ops.init_hw(hw);
2645 if (err) {
2646 pr_err("init_shared_code failed: %d\n", err);
2647 goto out;
2648 }
2649 ixgbevf_negotiate_api(adapter);
2650 err = hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
2651 if (err)
2652 dev_info(&pdev->dev, "Error reading MAC address\n");
2653 else if (is_zero_ether_addr(adapter->hw.mac.addr))
2654 dev_info(&pdev->dev,
2655 "MAC address not assigned by administrator.\n");
2656 ether_addr_copy(netdev->dev_addr, hw->mac.addr);
2657 }
2658
2659 if (!is_valid_ether_addr(netdev->dev_addr)) {
2660 dev_info(&pdev->dev, "Assigning random MAC address\n");
2661 eth_hw_addr_random(netdev);
2662 ether_addr_copy(hw->mac.addr, netdev->dev_addr);
2663 ether_addr_copy(hw->mac.perm_addr, netdev->dev_addr);
2664 }
2665
2666 /* Enable dynamic interrupt throttling rates */
2667 adapter->rx_itr_setting = 1;
2668 adapter->tx_itr_setting = 1;
2669
2670 /* set default ring sizes */
2671 adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD;
2672 adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD;
2673
2674 set_bit(__IXGBEVF_DOWN, &adapter->state);
2675 return 0;
2676
2677out:
2678 return err;
2679}
2680
2681#define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter) \
2682 { \
2683 u32 current_counter = IXGBE_READ_REG(hw, reg); \
2684 if (current_counter < last_counter) \
2685 counter += 0x100000000LL; \
2686 last_counter = current_counter; \
2687 counter &= 0xFFFFFFFF00000000LL; \
2688 counter |= current_counter; \
2689 }
2690
2691#define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
2692 { \
2693 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb); \
2694 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb); \
2695 u64 current_counter = (current_counter_msb << 32) | \
2696 current_counter_lsb; \
2697 if (current_counter < last_counter) \
2698 counter += 0x1000000000LL; \
2699 last_counter = current_counter; \
2700 counter &= 0xFFFFFFF000000000LL; \
2701 counter |= current_counter; \
2702 }
2703/**
2704 * ixgbevf_update_stats - Update the board statistics counters.
2705 * @adapter: board private structure
2706 **/
2707void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
2708{
2709 struct ixgbe_hw *hw = &adapter->hw;
2710 int i;
2711
2712 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
2713 test_bit(__IXGBEVF_RESETTING, &adapter->state))
2714 return;
2715
2716 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc,
2717 adapter->stats.vfgprc);
2718 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc,
2719 adapter->stats.vfgptc);
2720 UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB,
2721 adapter->stats.last_vfgorc,
2722 adapter->stats.vfgorc);
2723 UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB,
2724 adapter->stats.last_vfgotc,
2725 adapter->stats.vfgotc);
2726 UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
2727 adapter->stats.vfmprc);
2728
2729 for (i = 0; i < adapter->num_rx_queues; i++) {
2730 adapter->hw_csum_rx_error +=
2731 adapter->rx_ring[i]->hw_csum_rx_error;
2732 adapter->rx_ring[i]->hw_csum_rx_error = 0;
2733 }
2734}
2735
2736/**
2737 * ixgbevf_service_timer - Timer Call-back
2738 * @data: pointer to adapter cast into an unsigned long
2739 **/
2740static void ixgbevf_service_timer(unsigned long data)
2741{
2742 struct ixgbevf_adapter *adapter = (struct ixgbevf_adapter *)data;
2743
2744 /* Reset the timer */
2745 mod_timer(&adapter->service_timer, (HZ * 2) + jiffies);
2746
2747 ixgbevf_service_event_schedule(adapter);
2748}
2749
2750static void ixgbevf_reset_subtask(struct ixgbevf_adapter *adapter)
2751{
2752 if (!(adapter->flags & IXGBEVF_FLAG_RESET_REQUESTED))
2753 return;
2754
2755 adapter->flags &= ~IXGBEVF_FLAG_RESET_REQUESTED;
2756
2757 /* If we're already down or resetting, just bail */
2758 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
2759 test_bit(__IXGBEVF_RESETTING, &adapter->state))
2760 return;
2761
2762 adapter->tx_timeout_count++;
2763
2764 ixgbevf_reinit_locked(adapter);
2765}
2766
2767/**
2768 * ixgbevf_check_hang_subtask - check for hung queues and dropped interrupts
2769 * @adapter: pointer to the device adapter structure
2770 *
2771 * This function serves two purposes. First it strobes the interrupt lines
2772 * in order to make certain interrupts are occurring. Secondly it sets the
2773 * bits needed to check for TX hangs. As a result we should immediately
2774 * determine if a hang has occurred.
2775 **/
2776static void ixgbevf_check_hang_subtask(struct ixgbevf_adapter *adapter)
2777{
2778 struct ixgbe_hw *hw = &adapter->hw;
2779 u32 eics = 0;
2780 int i;
2781
2782 /* If we're down or resetting, just bail */
2783 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
2784 test_bit(__IXGBEVF_RESETTING, &adapter->state))
2785 return;
2786
2787 /* Force detection of hung controller */
2788 if (netif_carrier_ok(adapter->netdev)) {
2789 for (i = 0; i < adapter->num_tx_queues; i++)
2790 set_check_for_tx_hang(adapter->tx_ring[i]);
2791 }
2792
2793 /* get one bit for every active Tx/Rx interrupt vector */
2794 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
2795 struct ixgbevf_q_vector *qv = adapter->q_vector[i];
2796
2797 if (qv->rx.ring || qv->tx.ring)
2798 eics |= 1 << i;
2799 }
2800
2801 /* Cause software interrupt to ensure rings are cleaned */
2802 IXGBE_WRITE_REG(hw, IXGBE_VTEICS, eics);
2803}
2804
2805/**
2806 * ixgbevf_watchdog_update_link - update the link status
2807 * @adapter: pointer to the device adapter structure
2808 **/
2809static void ixgbevf_watchdog_update_link(struct ixgbevf_adapter *adapter)
2810{
2811 struct ixgbe_hw *hw = &adapter->hw;
2812 u32 link_speed = adapter->link_speed;
2813 bool link_up = adapter->link_up;
2814 s32 err;
2815
2816 spin_lock_bh(&adapter->mbx_lock);
2817
2818 err = hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
2819
2820 spin_unlock_bh(&adapter->mbx_lock);
2821
2822 /* if check for link returns error we will need to reset */
2823 if (err && time_after(jiffies, adapter->last_reset + (10 * HZ))) {
2824 adapter->flags |= IXGBEVF_FLAG_RESET_REQUESTED;
2825 link_up = false;
2826 }
2827
2828 adapter->link_up = link_up;
2829 adapter->link_speed = link_speed;
2830}
2831
2832/**
2833 * ixgbevf_watchdog_link_is_up - update netif_carrier status and
2834 * print link up message
2835 * @adapter: pointer to the device adapter structure
2836 **/
2837static void ixgbevf_watchdog_link_is_up(struct ixgbevf_adapter *adapter)
2838{
2839 struct net_device *netdev = adapter->netdev;
2840
2841 /* only continue if link was previously down */
2842 if (netif_carrier_ok(netdev))
2843 return;
2844
2845 dev_info(&adapter->pdev->dev, "NIC Link is Up %s\n",
2846 (adapter->link_speed == IXGBE_LINK_SPEED_10GB_FULL) ?
2847 "10 Gbps" :
2848 (adapter->link_speed == IXGBE_LINK_SPEED_1GB_FULL) ?
2849 "1 Gbps" :
2850 (adapter->link_speed == IXGBE_LINK_SPEED_100_FULL) ?
2851 "100 Mbps" :
2852 "unknown speed");
2853
2854 netif_carrier_on(netdev);
2855}
2856
2857/**
2858 * ixgbevf_watchdog_link_is_down - update netif_carrier status and
2859 * print link down message
2860 * @adapter: pointer to the adapter structure
2861 **/
2862static void ixgbevf_watchdog_link_is_down(struct ixgbevf_adapter *adapter)
2863{
2864 struct net_device *netdev = adapter->netdev;
2865
2866 adapter->link_speed = 0;
2867
2868 /* only continue if link was up previously */
2869 if (!netif_carrier_ok(netdev))
2870 return;
2871
2872 dev_info(&adapter->pdev->dev, "NIC Link is Down\n");
2873
2874 netif_carrier_off(netdev);
2875}
2876
2877/**
2878 * ixgbevf_watchdog_subtask - worker thread to bring link up
2879 * @work: pointer to work_struct containing our data
2880 **/
2881static void ixgbevf_watchdog_subtask(struct ixgbevf_adapter *adapter)
2882{
2883 /* if interface is down do nothing */
2884 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
2885 test_bit(__IXGBEVF_RESETTING, &adapter->state))
2886 return;
2887
2888 ixgbevf_watchdog_update_link(adapter);
2889
2890 if (adapter->link_up)
2891 ixgbevf_watchdog_link_is_up(adapter);
2892 else
2893 ixgbevf_watchdog_link_is_down(adapter);
2894
2895 ixgbevf_update_stats(adapter);
2896}
2897
2898/**
2899 * ixgbevf_service_task - manages and runs subtasks
2900 * @work: pointer to work_struct containing our data
2901 **/
2902static void ixgbevf_service_task(struct work_struct *work)
2903{
2904 struct ixgbevf_adapter *adapter = container_of(work,
2905 struct ixgbevf_adapter,
2906 service_task);
2907 struct ixgbe_hw *hw = &adapter->hw;
2908
2909 if (IXGBE_REMOVED(hw->hw_addr)) {
2910 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) {
2911 rtnl_lock();
2912 ixgbevf_down(adapter);
2913 rtnl_unlock();
2914 }
2915 return;
2916 }
2917
2918 ixgbevf_queue_reset_subtask(adapter);
2919 ixgbevf_reset_subtask(adapter);
2920 ixgbevf_watchdog_subtask(adapter);
2921 ixgbevf_check_hang_subtask(adapter);
2922
2923 ixgbevf_service_event_complete(adapter);
2924}
2925
2926/**
2927 * ixgbevf_free_tx_resources - Free Tx Resources per Queue
2928 * @tx_ring: Tx descriptor ring for a specific queue
2929 *
2930 * Free all transmit software resources
2931 **/
2932void ixgbevf_free_tx_resources(struct ixgbevf_ring *tx_ring)
2933{
2934 ixgbevf_clean_tx_ring(tx_ring);
2935
2936 vfree(tx_ring->tx_buffer_info);
2937 tx_ring->tx_buffer_info = NULL;
2938
2939 /* if not set, then don't free */
2940 if (!tx_ring->desc)
2941 return;
2942
2943 dma_free_coherent(tx_ring->dev, tx_ring->size, tx_ring->desc,
2944 tx_ring->dma);
2945
2946 tx_ring->desc = NULL;
2947}
2948
2949/**
2950 * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
2951 * @adapter: board private structure
2952 *
2953 * Free all transmit software resources
2954 **/
2955static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter)
2956{
2957 int i;
2958
2959 for (i = 0; i < adapter->num_tx_queues; i++)
2960 if (adapter->tx_ring[i]->desc)
2961 ixgbevf_free_tx_resources(adapter->tx_ring[i]);
2962}
2963
2964/**
2965 * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
2966 * @tx_ring: Tx descriptor ring (for a specific queue) to setup
2967 *
2968 * Return 0 on success, negative on failure
2969 **/
2970int ixgbevf_setup_tx_resources(struct ixgbevf_ring *tx_ring)
2971{
2972 int size;
2973
2974 size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
2975 tx_ring->tx_buffer_info = vzalloc(size);
2976 if (!tx_ring->tx_buffer_info)
2977 goto err;
2978
2979 /* round up to nearest 4K */
2980 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
2981 tx_ring->size = ALIGN(tx_ring->size, 4096);
2982
2983 tx_ring->desc = dma_alloc_coherent(tx_ring->dev, tx_ring->size,
2984 &tx_ring->dma, GFP_KERNEL);
2985 if (!tx_ring->desc)
2986 goto err;
2987
2988 return 0;
2989
2990err:
2991 vfree(tx_ring->tx_buffer_info);
2992 tx_ring->tx_buffer_info = NULL;
2993 hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit descriptor ring\n");
2994 return -ENOMEM;
2995}
2996
2997/**
2998 * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
2999 * @adapter: board private structure
3000 *
3001 * If this function returns with an error, then it's possible one or
3002 * more of the rings is populated (while the rest are not). It is the
3003 * callers duty to clean those orphaned rings.
3004 *
3005 * Return 0 on success, negative on failure
3006 **/
3007static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)
3008{
3009 int i, err = 0;
3010
3011 for (i = 0; i < adapter->num_tx_queues; i++) {
3012 err = ixgbevf_setup_tx_resources(adapter->tx_ring[i]);
3013 if (!err)
3014 continue;
3015 hw_dbg(&adapter->hw, "Allocation for Tx Queue %u failed\n", i);
3016 break;
3017 }
3018
3019 return err;
3020}
3021
3022/**
3023 * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
3024 * @rx_ring: Rx descriptor ring (for a specific queue) to setup
3025 *
3026 * Returns 0 on success, negative on failure
3027 **/
3028int ixgbevf_setup_rx_resources(struct ixgbevf_ring *rx_ring)
3029{
3030 int size;
3031
3032 size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
3033 rx_ring->rx_buffer_info = vzalloc(size);
3034 if (!rx_ring->rx_buffer_info)
3035 goto err;
3036
3037 /* Round up to nearest 4K */
3038 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
3039 rx_ring->size = ALIGN(rx_ring->size, 4096);
3040
3041 rx_ring->desc = dma_alloc_coherent(rx_ring->dev, rx_ring->size,
3042 &rx_ring->dma, GFP_KERNEL);
3043
3044 if (!rx_ring->desc)
3045 goto err;
3046
3047 return 0;
3048err:
3049 vfree(rx_ring->rx_buffer_info);
3050 rx_ring->rx_buffer_info = NULL;
3051 dev_err(rx_ring->dev, "Unable to allocate memory for the Rx descriptor ring\n");
3052 return -ENOMEM;
3053}
3054
3055/**
3056 * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
3057 * @adapter: board private structure
3058 *
3059 * If this function returns with an error, then it's possible one or
3060 * more of the rings is populated (while the rest are not). It is the
3061 * callers duty to clean those orphaned rings.
3062 *
3063 * Return 0 on success, negative on failure
3064 **/
3065static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter)
3066{
3067 int i, err = 0;
3068
3069 for (i = 0; i < adapter->num_rx_queues; i++) {
3070 err = ixgbevf_setup_rx_resources(adapter->rx_ring[i]);
3071 if (!err)
3072 continue;
3073 hw_dbg(&adapter->hw, "Allocation for Rx Queue %u failed\n", i);
3074 break;
3075 }
3076 return err;
3077}
3078
3079/**
3080 * ixgbevf_free_rx_resources - Free Rx Resources
3081 * @rx_ring: ring to clean the resources from
3082 *
3083 * Free all receive software resources
3084 **/
3085void ixgbevf_free_rx_resources(struct ixgbevf_ring *rx_ring)
3086{
3087 ixgbevf_clean_rx_ring(rx_ring);
3088
3089 vfree(rx_ring->rx_buffer_info);
3090 rx_ring->rx_buffer_info = NULL;
3091
3092 dma_free_coherent(rx_ring->dev, rx_ring->size, rx_ring->desc,
3093 rx_ring->dma);
3094
3095 rx_ring->desc = NULL;
3096}
3097
3098/**
3099 * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
3100 * @adapter: board private structure
3101 *
3102 * Free all receive software resources
3103 **/
3104static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter)
3105{
3106 int i;
3107
3108 for (i = 0; i < adapter->num_rx_queues; i++)
3109 if (adapter->rx_ring[i]->desc)
3110 ixgbevf_free_rx_resources(adapter->rx_ring[i]);
3111}
3112
3113/**
3114 * ixgbevf_open - Called when a network interface is made active
3115 * @netdev: network interface device structure
3116 *
3117 * Returns 0 on success, negative value on failure
3118 *
3119 * The open entry point is called when a network interface is made
3120 * active by the system (IFF_UP). At this point all resources needed
3121 * for transmit and receive operations are allocated, the interrupt
3122 * handler is registered with the OS, the watchdog timer is started,
3123 * and the stack is notified that the interface is ready.
3124 **/
3125int ixgbevf_open(struct net_device *netdev)
3126{
3127 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3128 struct ixgbe_hw *hw = &adapter->hw;
3129 int err;
3130
3131 /* A previous failure to open the device because of a lack of
3132 * available MSIX vector resources may have reset the number
3133 * of msix vectors variable to zero. The only way to recover
3134 * is to unload/reload the driver and hope that the system has
3135 * been able to recover some MSIX vector resources.
3136 */
3137 if (!adapter->num_msix_vectors)
3138 return -ENOMEM;
3139
3140 if (hw->adapter_stopped) {
3141 ixgbevf_reset(adapter);
3142 /* if adapter is still stopped then PF isn't up and
3143 * the VF can't start.
3144 */
3145 if (hw->adapter_stopped) {
3146 err = IXGBE_ERR_MBX;
3147 pr_err("Unable to start - perhaps the PF Driver isn't up yet\n");
3148 goto err_setup_reset;
3149 }
3150 }
3151
3152 /* disallow open during test */
3153 if (test_bit(__IXGBEVF_TESTING, &adapter->state))
3154 return -EBUSY;
3155
3156 netif_carrier_off(netdev);
3157
3158 /* allocate transmit descriptors */
3159 err = ixgbevf_setup_all_tx_resources(adapter);
3160 if (err)
3161 goto err_setup_tx;
3162
3163 /* allocate receive descriptors */
3164 err = ixgbevf_setup_all_rx_resources(adapter);
3165 if (err)
3166 goto err_setup_rx;
3167
3168 ixgbevf_configure(adapter);
3169
3170 /* Map the Tx/Rx rings to the vectors we were allotted.
3171 * if request_irq will be called in this function map_rings
3172 * must be called *before* up_complete
3173 */
3174 ixgbevf_map_rings_to_vectors(adapter);
3175
3176 err = ixgbevf_request_irq(adapter);
3177 if (err)
3178 goto err_req_irq;
3179
3180 ixgbevf_up_complete(adapter);
3181
3182 return 0;
3183
3184err_req_irq:
3185 ixgbevf_down(adapter);
3186err_setup_rx:
3187 ixgbevf_free_all_rx_resources(adapter);
3188err_setup_tx:
3189 ixgbevf_free_all_tx_resources(adapter);
3190 ixgbevf_reset(adapter);
3191
3192err_setup_reset:
3193
3194 return err;
3195}
3196
3197/**
3198 * ixgbevf_close - Disables a network interface
3199 * @netdev: network interface device structure
3200 *
3201 * Returns 0, this is not allowed to fail
3202 *
3203 * The close entry point is called when an interface is de-activated
3204 * by the OS. The hardware is still under the drivers control, but
3205 * needs to be disabled. A global MAC reset is issued to stop the
3206 * hardware, and all transmit and receive resources are freed.
3207 **/
3208int ixgbevf_close(struct net_device *netdev)
3209{
3210 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3211
3212 ixgbevf_down(adapter);
3213 ixgbevf_free_irq(adapter);
3214
3215 ixgbevf_free_all_tx_resources(adapter);
3216 ixgbevf_free_all_rx_resources(adapter);
3217
3218 return 0;
3219}
3220
3221static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter)
3222{
3223 struct net_device *dev = adapter->netdev;
3224
3225 if (!(adapter->flags & IXGBEVF_FLAG_QUEUE_RESET_REQUESTED))
3226 return;
3227
3228 adapter->flags &= ~IXGBEVF_FLAG_QUEUE_RESET_REQUESTED;
3229
3230 /* if interface is down do nothing */
3231 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3232 test_bit(__IXGBEVF_RESETTING, &adapter->state))
3233 return;
3234
3235 /* Hardware has to reinitialize queues and interrupts to
3236 * match packet buffer alignment. Unfortunately, the
3237 * hardware is not flexible enough to do this dynamically.
3238 */
3239 if (netif_running(dev))
3240 ixgbevf_close(dev);
3241
3242 ixgbevf_clear_interrupt_scheme(adapter);
3243 ixgbevf_init_interrupt_scheme(adapter);
3244
3245 if (netif_running(dev))
3246 ixgbevf_open(dev);
3247}
3248
3249static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring *tx_ring,
3250 u32 vlan_macip_lens, u32 type_tucmd,
3251 u32 mss_l4len_idx)
3252{
3253 struct ixgbe_adv_tx_context_desc *context_desc;
3254 u16 i = tx_ring->next_to_use;
3255
3256 context_desc = IXGBEVF_TX_CTXTDESC(tx_ring, i);
3257
3258 i++;
3259 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
3260
3261 /* set bits to identify this as an advanced context descriptor */
3262 type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT;
3263
3264 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
3265 context_desc->seqnum_seed = 0;
3266 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd);
3267 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
3268}
3269
3270static int ixgbevf_tso(struct ixgbevf_ring *tx_ring,
3271 struct ixgbevf_tx_buffer *first,
3272 u8 *hdr_len)
3273{
3274 struct sk_buff *skb = first->skb;
3275 u32 vlan_macip_lens, type_tucmd;
3276 u32 mss_l4len_idx, l4len;
3277 int err;
3278
3279 if (skb->ip_summed != CHECKSUM_PARTIAL)
3280 return 0;
3281
3282 if (!skb_is_gso(skb))
3283 return 0;
3284
3285 err = skb_cow_head(skb, 0);
3286 if (err < 0)
3287 return err;
3288
3289 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
3290 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
3291
3292 if (first->protocol == htons(ETH_P_IP)) {
3293 struct iphdr *iph = ip_hdr(skb);
3294
3295 iph->tot_len = 0;
3296 iph->check = 0;
3297 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
3298 iph->daddr, 0,
3299 IPPROTO_TCP,
3300 0);
3301 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
3302 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
3303 IXGBE_TX_FLAGS_CSUM |
3304 IXGBE_TX_FLAGS_IPV4;
3305 } else if (skb_is_gso_v6(skb)) {
3306 ipv6_hdr(skb)->payload_len = 0;
3307 tcp_hdr(skb)->check =
3308 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
3309 &ipv6_hdr(skb)->daddr,
3310 0, IPPROTO_TCP, 0);
3311 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
3312 IXGBE_TX_FLAGS_CSUM;
3313 }
3314
3315 /* compute header lengths */
3316 l4len = tcp_hdrlen(skb);
3317 *hdr_len += l4len;
3318 *hdr_len = skb_transport_offset(skb) + l4len;
3319
3320 /* update GSO size and bytecount with header size */
3321 first->gso_segs = skb_shinfo(skb)->gso_segs;
3322 first->bytecount += (first->gso_segs - 1) * *hdr_len;
3323
3324 /* mss_l4len_id: use 1 as index for TSO */
3325 mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT;
3326 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
3327 mss_l4len_idx |= 1 << IXGBE_ADVTXD_IDX_SHIFT;
3328
3329 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
3330 vlan_macip_lens = skb_network_header_len(skb);
3331 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
3332 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
3333
3334 ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
3335 type_tucmd, mss_l4len_idx);
3336
3337 return 1;
3338}
3339
3340static void ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring,
3341 struct ixgbevf_tx_buffer *first)
3342{
3343 struct sk_buff *skb = first->skb;
3344 u32 vlan_macip_lens = 0;
3345 u32 mss_l4len_idx = 0;
3346 u32 type_tucmd = 0;
3347
3348 if (skb->ip_summed == CHECKSUM_PARTIAL) {
3349 u8 l4_hdr = 0;
3350 __be16 frag_off;
3351
3352 switch (first->protocol) {
3353 case htons(ETH_P_IP):
3354 vlan_macip_lens |= skb_network_header_len(skb);
3355 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
3356 l4_hdr = ip_hdr(skb)->protocol;
3357 break;
3358 case htons(ETH_P_IPV6):
3359 vlan_macip_lens |= skb_network_header_len(skb);
3360 l4_hdr = ipv6_hdr(skb)->nexthdr;
3361 if (likely(skb_network_header_len(skb) ==
3362 sizeof(struct ipv6hdr)))
3363 break;
3364 ipv6_skip_exthdr(skb, skb_network_offset(skb) +
3365 sizeof(struct ipv6hdr),
3366 &l4_hdr, &frag_off);
3367 if (unlikely(frag_off))
3368 l4_hdr = NEXTHDR_FRAGMENT;
3369 break;
3370 default:
3371 break;
3372 }
3373
3374 switch (l4_hdr) {
3375 case IPPROTO_TCP:
3376 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
3377 mss_l4len_idx = tcp_hdrlen(skb) <<
3378 IXGBE_ADVTXD_L4LEN_SHIFT;
3379 break;
3380 case IPPROTO_SCTP:
3381 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
3382 mss_l4len_idx = sizeof(struct sctphdr) <<
3383 IXGBE_ADVTXD_L4LEN_SHIFT;
3384 break;
3385 case IPPROTO_UDP:
3386 mss_l4len_idx = sizeof(struct udphdr) <<
3387 IXGBE_ADVTXD_L4LEN_SHIFT;
3388 break;
3389 default:
3390 if (unlikely(net_ratelimit())) {
3391 dev_warn(tx_ring->dev,
3392 "partial checksum, l3 proto=%x, l4 proto=%x\n",
3393 first->protocol, l4_hdr);
3394 }
3395 skb_checksum_help(skb);
3396 goto no_csum;
3397 }
3398
3399 /* update TX checksum flag */
3400 first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
3401 }
3402
3403no_csum:
3404 /* vlan_macip_lens: MACLEN, VLAN tag */
3405 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
3406 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
3407
3408 ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
3409 type_tucmd, mss_l4len_idx);
3410}
3411
3412static __le32 ixgbevf_tx_cmd_type(u32 tx_flags)
3413{
3414 /* set type for advanced descriptor with frame checksum insertion */
3415 __le32 cmd_type = cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA |
3416 IXGBE_ADVTXD_DCMD_IFCS |
3417 IXGBE_ADVTXD_DCMD_DEXT);
3418
3419 /* set HW VLAN bit if VLAN is present */
3420 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3421 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE);
3422
3423 /* set segmentation enable bits for TSO/FSO */
3424 if (tx_flags & IXGBE_TX_FLAGS_TSO)
3425 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE);
3426
3427 return cmd_type;
3428}
3429
3430static void ixgbevf_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
3431 u32 tx_flags, unsigned int paylen)
3432{
3433 __le32 olinfo_status = cpu_to_le32(paylen << IXGBE_ADVTXD_PAYLEN_SHIFT);
3434
3435 /* enable L4 checksum for TSO and TX checksum offload */
3436 if (tx_flags & IXGBE_TX_FLAGS_CSUM)
3437 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM);
3438
3439 /* enble IPv4 checksum for TSO */
3440 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
3441 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IXSM);
3442
3443 /* use index 1 context for TSO/FSO/FCOE */
3444 if (tx_flags & IXGBE_TX_FLAGS_TSO)
3445 olinfo_status |= cpu_to_le32(1 << IXGBE_ADVTXD_IDX_SHIFT);
3446
3447 /* Check Context must be set if Tx switch is enabled, which it
3448 * always is for case where virtual functions are running
3449 */
3450 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_CC);
3451
3452 tx_desc->read.olinfo_status = olinfo_status;
3453}
3454
3455static void ixgbevf_tx_map(struct ixgbevf_ring *tx_ring,
3456 struct ixgbevf_tx_buffer *first,
3457 const u8 hdr_len)
3458{
3459 dma_addr_t dma;
3460 struct sk_buff *skb = first->skb;
3461 struct ixgbevf_tx_buffer *tx_buffer;
3462 union ixgbe_adv_tx_desc *tx_desc;
3463 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
3464 unsigned int data_len = skb->data_len;
3465 unsigned int size = skb_headlen(skb);
3466 unsigned int paylen = skb->len - hdr_len;
3467 u32 tx_flags = first->tx_flags;
3468 __le32 cmd_type;
3469 u16 i = tx_ring->next_to_use;
3470
3471 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
3472
3473 ixgbevf_tx_olinfo_status(tx_desc, tx_flags, paylen);
3474 cmd_type = ixgbevf_tx_cmd_type(tx_flags);
3475
3476 dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);
3477 if (dma_mapping_error(tx_ring->dev, dma))
3478 goto dma_error;
3479
3480 /* record length, and DMA address */
3481 dma_unmap_len_set(first, len, size);
3482 dma_unmap_addr_set(first, dma, dma);
3483
3484 tx_desc->read.buffer_addr = cpu_to_le64(dma);
3485
3486 for (;;) {
3487 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {
3488 tx_desc->read.cmd_type_len =
3489 cmd_type | cpu_to_le32(IXGBE_MAX_DATA_PER_TXD);
3490
3491 i++;
3492 tx_desc++;
3493 if (i == tx_ring->count) {
3494 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
3495 i = 0;
3496 }
3497
3498 dma += IXGBE_MAX_DATA_PER_TXD;
3499 size -= IXGBE_MAX_DATA_PER_TXD;
3500
3501 tx_desc->read.buffer_addr = cpu_to_le64(dma);
3502 tx_desc->read.olinfo_status = 0;
3503 }
3504
3505 if (likely(!data_len))
3506 break;
3507
3508 tx_desc->read.cmd_type_len = cmd_type | cpu_to_le32(size);
3509
3510 i++;
3511 tx_desc++;
3512 if (i == tx_ring->count) {
3513 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
3514 i = 0;
3515 }
3516
3517 size = skb_frag_size(frag);
3518 data_len -= size;
3519
3520 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,
3521 DMA_TO_DEVICE);
3522 if (dma_mapping_error(tx_ring->dev, dma))
3523 goto dma_error;
3524
3525 tx_buffer = &tx_ring->tx_buffer_info[i];
3526 dma_unmap_len_set(tx_buffer, len, size);
3527 dma_unmap_addr_set(tx_buffer, dma, dma);
3528
3529 tx_desc->read.buffer_addr = cpu_to_le64(dma);
3530 tx_desc->read.olinfo_status = 0;
3531
3532 frag++;
3533 }
3534
3535 /* write last descriptor with RS and EOP bits */
3536 cmd_type |= cpu_to_le32(size) | cpu_to_le32(IXGBE_TXD_CMD);
3537 tx_desc->read.cmd_type_len = cmd_type;
3538
3539 /* set the timestamp */
3540 first->time_stamp = jiffies;
3541
3542 /* Force memory writes to complete before letting h/w know there
3543 * are new descriptors to fetch. (Only applicable for weak-ordered
3544 * memory model archs, such as IA-64).
3545 *
3546 * We also need this memory barrier (wmb) to make certain all of the
3547 * status bits have been updated before next_to_watch is written.
3548 */
3549 wmb();
3550
3551 /* set next_to_watch value indicating a packet is present */
3552 first->next_to_watch = tx_desc;
3553
3554 i++;
3555 if (i == tx_ring->count)
3556 i = 0;
3557
3558 tx_ring->next_to_use = i;
3559
3560 /* notify HW of packet */
3561 ixgbevf_write_tail(tx_ring, i);
3562
3563 return;
3564dma_error:
3565 dev_err(tx_ring->dev, "TX DMA map failed\n");
3566
3567 /* clear dma mappings for failed tx_buffer_info map */
3568 for (;;) {
3569 tx_buffer = &tx_ring->tx_buffer_info[i];
3570 ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer);
3571 if (tx_buffer == first)
3572 break;
3573 if (i == 0)
3574 i = tx_ring->count;
3575 i--;
3576 }
3577
3578 tx_ring->next_to_use = i;
3579}
3580
3581static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
3582{
3583 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
3584 /* Herbert's original patch had:
3585 * smp_mb__after_netif_stop_queue();
3586 * but since that doesn't exist yet, just open code it.
3587 */
3588 smp_mb();
3589
3590 /* We need to check again in a case another CPU has just
3591 * made room available.
3592 */
3593 if (likely(ixgbevf_desc_unused(tx_ring) < size))
3594 return -EBUSY;
3595
3596 /* A reprieve! - use start_queue because it doesn't call schedule */
3597 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
3598 ++tx_ring->tx_stats.restart_queue;
3599
3600 return 0;
3601}
3602
3603static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
3604{
3605 if (likely(ixgbevf_desc_unused(tx_ring) >= size))
3606 return 0;
3607 return __ixgbevf_maybe_stop_tx(tx_ring, size);
3608}
3609
3610static int ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3611{
3612 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3613 struct ixgbevf_tx_buffer *first;
3614 struct ixgbevf_ring *tx_ring;
3615 int tso;
3616 u32 tx_flags = 0;
3617 u16 count = TXD_USE_COUNT(skb_headlen(skb));
3618#if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3619 unsigned short f;
3620#endif
3621 u8 hdr_len = 0;
3622 u8 *dst_mac = skb_header_pointer(skb, 0, 0, NULL);
3623
3624 if (!dst_mac || is_link_local_ether_addr(dst_mac)) {
3625 dev_kfree_skb_any(skb);
3626 return NETDEV_TX_OK;
3627 }
3628
3629 tx_ring = adapter->tx_ring[skb->queue_mapping];
3630
3631 /* need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
3632 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
3633 * + 2 desc gap to keep tail from touching head,
3634 * + 1 desc for context descriptor,
3635 * otherwise try next time
3636 */
3637#if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3638 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
3639 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
3640#else
3641 count += skb_shinfo(skb)->nr_frags;
3642#endif
3643 if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) {
3644 tx_ring->tx_stats.tx_busy++;
3645 return NETDEV_TX_BUSY;
3646 }
3647
3648 /* record the location of the first descriptor for this packet */
3649 first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
3650 first->skb = skb;
3651 first->bytecount = skb->len;
3652 first->gso_segs = 1;
3653
3654 if (skb_vlan_tag_present(skb)) {
3655 tx_flags |= skb_vlan_tag_get(skb);
3656 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
3657 tx_flags |= IXGBE_TX_FLAGS_VLAN;
3658 }
3659
3660 /* record initial flags and protocol */
3661 first->tx_flags = tx_flags;
3662 first->protocol = vlan_get_protocol(skb);
3663
3664 tso = ixgbevf_tso(tx_ring, first, &hdr_len);
3665 if (tso < 0)
3666 goto out_drop;
3667 else if (!tso)
3668 ixgbevf_tx_csum(tx_ring, first);
3669
3670 ixgbevf_tx_map(tx_ring, first, hdr_len);
3671
3672 ixgbevf_maybe_stop_tx(tx_ring, DESC_NEEDED);
3673
3674 return NETDEV_TX_OK;
3675
3676out_drop:
3677 dev_kfree_skb_any(first->skb);
3678 first->skb = NULL;
3679
3680 return NETDEV_TX_OK;
3681}
3682
3683/**
3684 * ixgbevf_set_mac - Change the Ethernet Address of the NIC
3685 * @netdev: network interface device structure
3686 * @p: pointer to an address structure
3687 *
3688 * Returns 0 on success, negative on failure
3689 **/
3690static int ixgbevf_set_mac(struct net_device *netdev, void *p)
3691{
3692 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3693 struct ixgbe_hw *hw = &adapter->hw;
3694 struct sockaddr *addr = p;
3695 int err;
3696
3697 if (!is_valid_ether_addr(addr->sa_data))
3698 return -EADDRNOTAVAIL;
3699
3700 spin_lock_bh(&adapter->mbx_lock);
3701
3702 err = hw->mac.ops.set_rar(hw, 0, addr->sa_data, 0);
3703
3704 spin_unlock_bh(&adapter->mbx_lock);
3705
3706 if (err)
3707 return -EPERM;
3708
3709 ether_addr_copy(hw->mac.addr, addr->sa_data);
3710 ether_addr_copy(netdev->dev_addr, addr->sa_data);
3711
3712 return 0;
3713}
3714
3715/**
3716 * ixgbevf_change_mtu - Change the Maximum Transfer Unit
3717 * @netdev: network interface device structure
3718 * @new_mtu: new value for maximum frame size
3719 *
3720 * Returns 0 on success, negative on failure
3721 **/
3722static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
3723{
3724 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3725 struct ixgbe_hw *hw = &adapter->hw;
3726 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
3727 int max_possible_frame = MAXIMUM_ETHERNET_VLAN_SIZE;
3728
3729 switch (adapter->hw.api_version) {
3730 case ixgbe_mbox_api_11:
3731 case ixgbe_mbox_api_12:
3732 max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE;
3733 break;
3734 default:
3735 if (adapter->hw.mac.type != ixgbe_mac_82599_vf)
3736 max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE;
3737 break;
3738 }
3739
3740 /* MTU < 68 is an error and causes problems on some kernels */
3741 if ((new_mtu < 68) || (max_frame > max_possible_frame))
3742 return -EINVAL;
3743
3744 hw_dbg(hw, "changing MTU from %d to %d\n",
3745 netdev->mtu, new_mtu);
3746 /* must set new MTU before calling down or up */
3747 netdev->mtu = new_mtu;
3748
3749 /* notify the PF of our intent to use this size of frame */
3750 ixgbevf_rlpml_set_vf(hw, max_frame);
3751
3752 return 0;
3753}
3754
3755#ifdef CONFIG_NET_POLL_CONTROLLER
3756/* Polling 'interrupt' - used by things like netconsole to send skbs
3757 * without having to re-enable interrupts. It's not called while
3758 * the interrupt routine is executing.
3759 */
3760static void ixgbevf_netpoll(struct net_device *netdev)
3761{
3762 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3763 int i;
3764
3765 /* if interface is down do nothing */
3766 if (test_bit(__IXGBEVF_DOWN, &adapter->state))
3767 return;
3768 for (i = 0; i < adapter->num_rx_queues; i++)
3769 ixgbevf_msix_clean_rings(0, adapter->q_vector[i]);
3770}
3771#endif /* CONFIG_NET_POLL_CONTROLLER */
3772
3773static int ixgbevf_suspend(struct pci_dev *pdev, pm_message_t state)
3774{
3775 struct net_device *netdev = pci_get_drvdata(pdev);
3776 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3777#ifdef CONFIG_PM
3778 int retval = 0;
3779#endif
3780
3781 netif_device_detach(netdev);
3782
3783 if (netif_running(netdev)) {
3784 rtnl_lock();
3785 ixgbevf_down(adapter);
3786 ixgbevf_free_irq(adapter);
3787 ixgbevf_free_all_tx_resources(adapter);
3788 ixgbevf_free_all_rx_resources(adapter);
3789 rtnl_unlock();
3790 }
3791
3792 ixgbevf_clear_interrupt_scheme(adapter);
3793
3794#ifdef CONFIG_PM
3795 retval = pci_save_state(pdev);
3796 if (retval)
3797 return retval;
3798
3799#endif
3800 if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state))
3801 pci_disable_device(pdev);
3802
3803 return 0;
3804}
3805
3806#ifdef CONFIG_PM
3807static int ixgbevf_resume(struct pci_dev *pdev)
3808{
3809 struct net_device *netdev = pci_get_drvdata(pdev);
3810 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3811 u32 err;
3812
3813 pci_restore_state(pdev);
3814 /* pci_restore_state clears dev->state_saved so call
3815 * pci_save_state to restore it.
3816 */
3817 pci_save_state(pdev);
3818
3819 err = pci_enable_device_mem(pdev);
3820 if (err) {
3821 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
3822 return err;
3823 }
3824 smp_mb__before_atomic();
3825 clear_bit(__IXGBEVF_DISABLED, &adapter->state);
3826 pci_set_master(pdev);
3827
3828 ixgbevf_reset(adapter);
3829
3830 rtnl_lock();
3831 err = ixgbevf_init_interrupt_scheme(adapter);
3832 rtnl_unlock();
3833 if (err) {
3834 dev_err(&pdev->dev, "Cannot initialize interrupts\n");
3835 return err;
3836 }
3837
3838 if (netif_running(netdev)) {
3839 err = ixgbevf_open(netdev);
3840 if (err)
3841 return err;
3842 }
3843
3844 netif_device_attach(netdev);
3845
3846 return err;
3847}
3848
3849#endif /* CONFIG_PM */
3850static void ixgbevf_shutdown(struct pci_dev *pdev)
3851{
3852 ixgbevf_suspend(pdev, PMSG_SUSPEND);
3853}
3854
3855static struct rtnl_link_stats64 *ixgbevf_get_stats(struct net_device *netdev,
3856 struct rtnl_link_stats64 *stats)
3857{
3858 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3859 unsigned int start;
3860 u64 bytes, packets;
3861 const struct ixgbevf_ring *ring;
3862 int i;
3863
3864 ixgbevf_update_stats(adapter);
3865
3866 stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc;
3867
3868 for (i = 0; i < adapter->num_rx_queues; i++) {
3869 ring = adapter->rx_ring[i];
3870 do {
3871 start = u64_stats_fetch_begin_irq(&ring->syncp);
3872 bytes = ring->stats.bytes;
3873 packets = ring->stats.packets;
3874 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
3875 stats->rx_bytes += bytes;
3876 stats->rx_packets += packets;
3877 }
3878
3879 for (i = 0; i < adapter->num_tx_queues; i++) {
3880 ring = adapter->tx_ring[i];
3881 do {
3882 start = u64_stats_fetch_begin_irq(&ring->syncp);
3883 bytes = ring->stats.bytes;
3884 packets = ring->stats.packets;
3885 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
3886 stats->tx_bytes += bytes;
3887 stats->tx_packets += packets;
3888 }
3889
3890 return stats;
3891}
3892
3893static const struct net_device_ops ixgbevf_netdev_ops = {
3894 .ndo_open = ixgbevf_open,
3895 .ndo_stop = ixgbevf_close,
3896 .ndo_start_xmit = ixgbevf_xmit_frame,
3897 .ndo_set_rx_mode = ixgbevf_set_rx_mode,
3898 .ndo_get_stats64 = ixgbevf_get_stats,
3899 .ndo_validate_addr = eth_validate_addr,
3900 .ndo_set_mac_address = ixgbevf_set_mac,
3901 .ndo_change_mtu = ixgbevf_change_mtu,
3902 .ndo_tx_timeout = ixgbevf_tx_timeout,
3903 .ndo_vlan_rx_add_vid = ixgbevf_vlan_rx_add_vid,
3904 .ndo_vlan_rx_kill_vid = ixgbevf_vlan_rx_kill_vid,
3905#ifdef CONFIG_NET_RX_BUSY_POLL
3906 .ndo_busy_poll = ixgbevf_busy_poll_recv,
3907#endif
3908#ifdef CONFIG_NET_POLL_CONTROLLER
3909 .ndo_poll_controller = ixgbevf_netpoll,
3910#endif
3911 .ndo_features_check = passthru_features_check,
3912};
3913
3914static void ixgbevf_assign_netdev_ops(struct net_device *dev)
3915{
3916 dev->netdev_ops = &ixgbevf_netdev_ops;
3917 ixgbevf_set_ethtool_ops(dev);
3918 dev->watchdog_timeo = 5 * HZ;
3919}
3920
3921/**
3922 * ixgbevf_probe - Device Initialization Routine
3923 * @pdev: PCI device information struct
3924 * @ent: entry in ixgbevf_pci_tbl
3925 *
3926 * Returns 0 on success, negative on failure
3927 *
3928 * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
3929 * The OS initialization, configuring of the adapter private structure,
3930 * and a hardware reset occur.
3931 **/
3932static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3933{
3934 struct net_device *netdev;
3935 struct ixgbevf_adapter *adapter = NULL;
3936 struct ixgbe_hw *hw = NULL;
3937 const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
3938 int err, pci_using_dac;
3939 bool disable_dev = false;
3940
3941 err = pci_enable_device(pdev);
3942 if (err)
3943 return err;
3944
3945 if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
3946 pci_using_dac = 1;
3947 } else {
3948 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
3949 if (err) {
3950 dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
3951 goto err_dma;
3952 }
3953 pci_using_dac = 0;
3954 }
3955
3956 err = pci_request_regions(pdev, ixgbevf_driver_name);
3957 if (err) {
3958 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
3959 goto err_pci_reg;
3960 }
3961
3962 pci_set_master(pdev);
3963
3964 netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),
3965 MAX_TX_QUEUES);
3966 if (!netdev) {
3967 err = -ENOMEM;
3968 goto err_alloc_etherdev;
3969 }
3970
3971 SET_NETDEV_DEV(netdev, &pdev->dev);
3972
3973 adapter = netdev_priv(netdev);
3974
3975 adapter->netdev = netdev;
3976 adapter->pdev = pdev;
3977 hw = &adapter->hw;
3978 hw->back = adapter;
3979 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
3980
3981 /* call save state here in standalone driver because it relies on
3982 * adapter struct to exist, and needs to call netdev_priv
3983 */
3984 pci_save_state(pdev);
3985
3986 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
3987 pci_resource_len(pdev, 0));
3988 adapter->io_addr = hw->hw_addr;
3989 if (!hw->hw_addr) {
3990 err = -EIO;
3991 goto err_ioremap;
3992 }
3993
3994 ixgbevf_assign_netdev_ops(netdev);
3995
3996 /* Setup HW API */
3997 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
3998 hw->mac.type = ii->mac;
3999
4000 memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
4001 sizeof(struct ixgbe_mbx_operations));
4002
4003 /* setup the private structure */
4004 err = ixgbevf_sw_init(adapter);
4005 if (err)
4006 goto err_sw_init;
4007
4008 /* The HW MAC address was set and/or determined in sw_init */
4009 if (!is_valid_ether_addr(netdev->dev_addr)) {
4010 pr_err("invalid MAC address\n");
4011 err = -EIO;
4012 goto err_sw_init;
4013 }
4014
4015 netdev->hw_features = NETIF_F_SG |
4016 NETIF_F_IP_CSUM |
4017 NETIF_F_IPV6_CSUM |
4018 NETIF_F_TSO |
4019 NETIF_F_TSO6 |
4020 NETIF_F_RXCSUM;
4021
4022 netdev->features = netdev->hw_features |
4023 NETIF_F_HW_VLAN_CTAG_TX |
4024 NETIF_F_HW_VLAN_CTAG_RX |
4025 NETIF_F_HW_VLAN_CTAG_FILTER;
4026
4027 netdev->vlan_features |= NETIF_F_TSO |
4028 NETIF_F_TSO6 |
4029 NETIF_F_IP_CSUM |
4030 NETIF_F_IPV6_CSUM |
4031 NETIF_F_SG;
4032
4033 if (pci_using_dac)
4034 netdev->features |= NETIF_F_HIGHDMA;
4035
4036 netdev->priv_flags |= IFF_UNICAST_FLT;
4037
4038 if (IXGBE_REMOVED(hw->hw_addr)) {
4039 err = -EIO;
4040 goto err_sw_init;
4041 }
4042
4043 setup_timer(&adapter->service_timer, &ixgbevf_service_timer,
4044 (unsigned long)adapter);
4045
4046 INIT_WORK(&adapter->service_task, ixgbevf_service_task);
4047 set_bit(__IXGBEVF_SERVICE_INITED, &adapter->state);
4048 clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state);
4049
4050 err = ixgbevf_init_interrupt_scheme(adapter);
4051 if (err)
4052 goto err_sw_init;
4053
4054 strcpy(netdev->name, "eth%d");
4055
4056 err = register_netdev(netdev);
4057 if (err)
4058 goto err_register;
4059
4060 pci_set_drvdata(pdev, netdev);
4061 netif_carrier_off(netdev);
4062
4063 ixgbevf_init_last_counter_stats(adapter);
4064
4065 /* print the VF info */
4066 dev_info(&pdev->dev, "%pM\n", netdev->dev_addr);
4067 dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type);
4068
4069 switch (hw->mac.type) {
4070 case ixgbe_mac_X550_vf:
4071 dev_info(&pdev->dev, "Intel(R) X550 Virtual Function\n");
4072 break;
4073 case ixgbe_mac_X540_vf:
4074 dev_info(&pdev->dev, "Intel(R) X540 Virtual Function\n");
4075 break;
4076 case ixgbe_mac_82599_vf:
4077 default:
4078 dev_info(&pdev->dev, "Intel(R) 82599 Virtual Function\n");
4079 break;
4080 }
4081
4082 return 0;
4083
4084err_register:
4085 ixgbevf_clear_interrupt_scheme(adapter);
4086err_sw_init:
4087 ixgbevf_reset_interrupt_capability(adapter);
4088 iounmap(adapter->io_addr);
4089err_ioremap:
4090 disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state);
4091 free_netdev(netdev);
4092err_alloc_etherdev:
4093 pci_release_regions(pdev);
4094err_pci_reg:
4095err_dma:
4096 if (!adapter || disable_dev)
4097 pci_disable_device(pdev);
4098 return err;
4099}
4100
4101/**
4102 * ixgbevf_remove - Device Removal Routine
4103 * @pdev: PCI device information struct
4104 *
4105 * ixgbevf_remove is called by the PCI subsystem to alert the driver
4106 * that it should release a PCI device. The could be caused by a
4107 * Hot-Plug event, or because the driver is going to be removed from
4108 * memory.
4109 **/
4110static void ixgbevf_remove(struct pci_dev *pdev)
4111{
4112 struct net_device *netdev = pci_get_drvdata(pdev);
4113 struct ixgbevf_adapter *adapter;
4114 bool disable_dev;
4115
4116 if (!netdev)
4117 return;
4118
4119 adapter = netdev_priv(netdev);
4120
4121 set_bit(__IXGBEVF_REMOVING, &adapter->state);
4122 cancel_work_sync(&adapter->service_task);
4123
4124 if (netdev->reg_state == NETREG_REGISTERED)
4125 unregister_netdev(netdev);
4126
4127 ixgbevf_clear_interrupt_scheme(adapter);
4128 ixgbevf_reset_interrupt_capability(adapter);
4129
4130 iounmap(adapter->io_addr);
4131 pci_release_regions(pdev);
4132
4133 hw_dbg(&adapter->hw, "Remove complete\n");
4134
4135 disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state);
4136 free_netdev(netdev);
4137
4138 if (disable_dev)
4139 pci_disable_device(pdev);
4140}
4141
4142/**
4143 * ixgbevf_io_error_detected - called when PCI error is detected
4144 * @pdev: Pointer to PCI device
4145 * @state: The current pci connection state
4146 *
4147 * This function is called after a PCI bus error affecting
4148 * this device has been detected.
4149 **/
4150static pci_ers_result_t ixgbevf_io_error_detected(struct pci_dev *pdev,
4151 pci_channel_state_t state)
4152{
4153 struct net_device *netdev = pci_get_drvdata(pdev);
4154 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4155
4156 if (!test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state))
4157 return PCI_ERS_RESULT_DISCONNECT;
4158
4159 rtnl_lock();
4160 netif_device_detach(netdev);
4161
4162 if (state == pci_channel_io_perm_failure) {
4163 rtnl_unlock();
4164 return PCI_ERS_RESULT_DISCONNECT;
4165 }
4166
4167 if (netif_running(netdev))
4168 ixgbevf_down(adapter);
4169
4170 if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state))
4171 pci_disable_device(pdev);
4172 rtnl_unlock();
4173
4174 /* Request a slot slot reset. */
4175 return PCI_ERS_RESULT_NEED_RESET;
4176}
4177
4178/**
4179 * ixgbevf_io_slot_reset - called after the pci bus has been reset.
4180 * @pdev: Pointer to PCI device
4181 *
4182 * Restart the card from scratch, as if from a cold-boot. Implementation
4183 * resembles the first-half of the ixgbevf_resume routine.
4184 **/
4185static pci_ers_result_t ixgbevf_io_slot_reset(struct pci_dev *pdev)
4186{
4187 struct net_device *netdev = pci_get_drvdata(pdev);
4188 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4189
4190 if (pci_enable_device_mem(pdev)) {
4191 dev_err(&pdev->dev,
4192 "Cannot re-enable PCI device after reset.\n");
4193 return PCI_ERS_RESULT_DISCONNECT;
4194 }
4195
4196 smp_mb__before_atomic();
4197 clear_bit(__IXGBEVF_DISABLED, &adapter->state);
4198 pci_set_master(pdev);
4199
4200 ixgbevf_reset(adapter);
4201
4202 return PCI_ERS_RESULT_RECOVERED;
4203}
4204
4205/**
4206 * ixgbevf_io_resume - called when traffic can start flowing again.
4207 * @pdev: Pointer to PCI device
4208 *
4209 * This callback is called when the error recovery driver tells us that
4210 * its OK to resume normal operation. Implementation resembles the
4211 * second-half of the ixgbevf_resume routine.
4212 **/
4213static void ixgbevf_io_resume(struct pci_dev *pdev)
4214{
4215 struct net_device *netdev = pci_get_drvdata(pdev);
4216 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4217
4218 if (netif_running(netdev))
4219 ixgbevf_up(adapter);
4220
4221 netif_device_attach(netdev);
4222}
4223
4224/* PCI Error Recovery (ERS) */
4225static const struct pci_error_handlers ixgbevf_err_handler = {
4226 .error_detected = ixgbevf_io_error_detected,
4227 .slot_reset = ixgbevf_io_slot_reset,
4228 .resume = ixgbevf_io_resume,
4229};
4230
4231static struct pci_driver ixgbevf_driver = {
4232 .name = ixgbevf_driver_name,
4233 .id_table = ixgbevf_pci_tbl,
4234 .probe = ixgbevf_probe,
4235 .remove = ixgbevf_remove,
4236#ifdef CONFIG_PM
4237 /* Power Management Hooks */
4238 .suspend = ixgbevf_suspend,
4239 .resume = ixgbevf_resume,
4240#endif
4241 .shutdown = ixgbevf_shutdown,
4242 .err_handler = &ixgbevf_err_handler
4243};
4244
4245/**
4246 * ixgbevf_init_module - Driver Registration Routine
4247 *
4248 * ixgbevf_init_module is the first routine called when the driver is
4249 * loaded. All it does is register with the PCI subsystem.
4250 **/
4251static int __init ixgbevf_init_module(void)
4252{
4253 pr_info("%s - version %s\n", ixgbevf_driver_string,
4254 ixgbevf_driver_version);
4255
4256 pr_info("%s\n", ixgbevf_copyright);
4257 ixgbevf_wq = create_singlethread_workqueue(ixgbevf_driver_name);
4258 if (!ixgbevf_wq) {
4259 pr_err("%s: Failed to create workqueue\n", ixgbevf_driver_name);
4260 return -ENOMEM;
4261 }
4262
4263 return pci_register_driver(&ixgbevf_driver);
4264}
4265
4266module_init(ixgbevf_init_module);
4267
4268/**
4269 * ixgbevf_exit_module - Driver Exit Cleanup Routine
4270 *
4271 * ixgbevf_exit_module is called just before the driver is removed
4272 * from memory.
4273 **/
4274static void __exit ixgbevf_exit_module(void)
4275{
4276 pci_unregister_driver(&ixgbevf_driver);
4277 if (ixgbevf_wq) {
4278 destroy_workqueue(ixgbevf_wq);
4279 ixgbevf_wq = NULL;
4280 }
4281}
4282
4283#ifdef DEBUG
4284/**
4285 * ixgbevf_get_hw_dev_name - return device name string
4286 * used by hardware layer to print debugging information
4287 **/
4288char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw)
4289{
4290 struct ixgbevf_adapter *adapter = hw->back;
4291
4292 return adapter->netdev->name;
4293}
4294
4295#endif
4296module_exit(ixgbevf_exit_module);
4297
4298/* ixgbevf_main.c */