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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_DESCRIPTION("Intel(R) 10 Gigabit Virtual Function Network Driver");
80MODULE_LICENSE("GPL v2");
81
82#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
83static int debug = -1;
84module_param(debug, int, 0);
85MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
86
87static struct workqueue_struct *ixgbevf_wq;
88
89static void ixgbevf_service_event_schedule(struct ixgbevf_adapter *adapter)
90{
91 if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&
92 !test_bit(__IXGBEVF_REMOVING, &adapter->state) &&
93 !test_and_set_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state))
94 queue_work(ixgbevf_wq, &adapter->service_task);
95}
96
97static void ixgbevf_service_event_complete(struct ixgbevf_adapter *adapter)
98{
99 BUG_ON(!test_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state));
100
101 /* flush memory to make sure state is correct before next watchdog */
102 smp_mb__before_atomic();
103 clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state);
104}
105
106/* forward decls */
107static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter);
108static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector);
109static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter);
110static bool ixgbevf_can_reuse_rx_page(struct ixgbevf_rx_buffer *rx_buffer);
111static void ixgbevf_reuse_rx_page(struct ixgbevf_ring *rx_ring,
112 struct ixgbevf_rx_buffer *old_buff);
113
114static void ixgbevf_remove_adapter(struct ixgbe_hw *hw)
115{
116 struct ixgbevf_adapter *adapter = hw->back;
117
118 if (!hw->hw_addr)
119 return;
120 hw->hw_addr = NULL;
121 dev_err(&adapter->pdev->dev, "Adapter removed\n");
122 if (test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state))
123 ixgbevf_service_event_schedule(adapter);
124}
125
126static void ixgbevf_check_remove(struct ixgbe_hw *hw, u32 reg)
127{
128 u32 value;
129
130 /* The following check not only optimizes a bit by not
131 * performing a read on the status register when the
132 * register just read was a status register read that
133 * returned IXGBE_FAILED_READ_REG. It also blocks any
134 * potential recursion.
135 */
136 if (reg == IXGBE_VFSTATUS) {
137 ixgbevf_remove_adapter(hw);
138 return;
139 }
140 value = ixgbevf_read_reg(hw, IXGBE_VFSTATUS);
141 if (value == IXGBE_FAILED_READ_REG)
142 ixgbevf_remove_adapter(hw);
143}
144
145u32 ixgbevf_read_reg(struct ixgbe_hw *hw, u32 reg)
146{
147 u8 __iomem *reg_addr = READ_ONCE(hw->hw_addr);
148 u32 value;
149
150 if (IXGBE_REMOVED(reg_addr))
151 return IXGBE_FAILED_READ_REG;
152 value = readl(reg_addr + reg);
153 if (unlikely(value == IXGBE_FAILED_READ_REG))
154 ixgbevf_check_remove(hw, reg);
155 return value;
156}
157
158/**
159 * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors
160 * @adapter: pointer to adapter struct
161 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
162 * @queue: queue to map the corresponding interrupt to
163 * @msix_vector: the vector to map to the corresponding queue
164 **/
165static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction,
166 u8 queue, u8 msix_vector)
167{
168 u32 ivar, index;
169 struct ixgbe_hw *hw = &adapter->hw;
170
171 if (direction == -1) {
172 /* other causes */
173 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
174 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC);
175 ivar &= ~0xFF;
176 ivar |= msix_vector;
177 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar);
178 } else {
179 /* Tx or Rx causes */
180 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
181 index = ((16 * (queue & 1)) + (8 * direction));
182 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1));
183 ivar &= ~(0xFF << index);
184 ivar |= (msix_vector << index);
185 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar);
186 }
187}
188
189static u64 ixgbevf_get_tx_completed(struct ixgbevf_ring *ring)
190{
191 return ring->stats.packets;
192}
193
194static u32 ixgbevf_get_tx_pending(struct ixgbevf_ring *ring)
195{
196 struct ixgbevf_adapter *adapter = netdev_priv(ring->netdev);
197 struct ixgbe_hw *hw = &adapter->hw;
198
199 u32 head = IXGBE_READ_REG(hw, IXGBE_VFTDH(ring->reg_idx));
200 u32 tail = IXGBE_READ_REG(hw, IXGBE_VFTDT(ring->reg_idx));
201
202 if (head != tail)
203 return (head < tail) ?
204 tail - head : (tail + ring->count - head);
205
206 return 0;
207}
208
209static inline bool ixgbevf_check_tx_hang(struct ixgbevf_ring *tx_ring)
210{
211 u32 tx_done = ixgbevf_get_tx_completed(tx_ring);
212 u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
213 u32 tx_pending = ixgbevf_get_tx_pending(tx_ring);
214
215 clear_check_for_tx_hang(tx_ring);
216
217 /* Check for a hung queue, but be thorough. This verifies
218 * that a transmit has been completed since the previous
219 * check AND there is at least one packet pending. The
220 * ARMED bit is set to indicate a potential hang.
221 */
222 if ((tx_done_old == tx_done) && tx_pending) {
223 /* make sure it is true for two checks in a row */
224 return test_and_set_bit(__IXGBEVF_HANG_CHECK_ARMED,
225 &tx_ring->state);
226 }
227 /* reset the countdown */
228 clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &tx_ring->state);
229
230 /* update completed stats and continue */
231 tx_ring->tx_stats.tx_done_old = tx_done;
232
233 return false;
234}
235
236static void ixgbevf_tx_timeout_reset(struct ixgbevf_adapter *adapter)
237{
238 /* Do the reset outside of interrupt context */
239 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) {
240 set_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state);
241 ixgbevf_service_event_schedule(adapter);
242 }
243}
244
245/**
246 * ixgbevf_tx_timeout - Respond to a Tx Hang
247 * @netdev: network interface device structure
248 * @txqueue: transmit queue hanging (unused)
249 **/
250static void ixgbevf_tx_timeout(struct net_device *netdev, unsigned int __always_unused txqueue)
251{
252 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
253
254 ixgbevf_tx_timeout_reset(adapter);
255}
256
257/**
258 * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes
259 * @q_vector: board private structure
260 * @tx_ring: tx ring to clean
261 * @napi_budget: Used to determine if we are in netpoll
262 **/
263static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector,
264 struct ixgbevf_ring *tx_ring, int napi_budget)
265{
266 struct ixgbevf_adapter *adapter = q_vector->adapter;
267 struct ixgbevf_tx_buffer *tx_buffer;
268 union ixgbe_adv_tx_desc *tx_desc;
269 unsigned int total_bytes = 0, total_packets = 0, total_ipsec = 0;
270 unsigned int budget = tx_ring->count / 2;
271 unsigned int i = tx_ring->next_to_clean;
272
273 if (test_bit(__IXGBEVF_DOWN, &adapter->state))
274 return true;
275
276 tx_buffer = &tx_ring->tx_buffer_info[i];
277 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
278 i -= tx_ring->count;
279
280 do {
281 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
282
283 /* if next_to_watch is not set then there is no work pending */
284 if (!eop_desc)
285 break;
286
287 /* prevent any other reads prior to eop_desc */
288 smp_rmb();
289
290 /* if DD is not set pending work has not been completed */
291 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
292 break;
293
294 /* clear next_to_watch to prevent false hangs */
295 tx_buffer->next_to_watch = NULL;
296
297 /* update the statistics for this packet */
298 total_bytes += tx_buffer->bytecount;
299 total_packets += tx_buffer->gso_segs;
300 if (tx_buffer->tx_flags & IXGBE_TX_FLAGS_IPSEC)
301 total_ipsec++;
302
303 /* free the skb */
304 if (ring_is_xdp(tx_ring))
305 page_frag_free(tx_buffer->data);
306 else
307 napi_consume_skb(tx_buffer->skb, napi_budget);
308
309 /* unmap skb header data */
310 dma_unmap_single(tx_ring->dev,
311 dma_unmap_addr(tx_buffer, dma),
312 dma_unmap_len(tx_buffer, len),
313 DMA_TO_DEVICE);
314
315 /* clear tx_buffer data */
316 dma_unmap_len_set(tx_buffer, len, 0);
317
318 /* unmap remaining buffers */
319 while (tx_desc != eop_desc) {
320 tx_buffer++;
321 tx_desc++;
322 i++;
323 if (unlikely(!i)) {
324 i -= tx_ring->count;
325 tx_buffer = tx_ring->tx_buffer_info;
326 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
327 }
328
329 /* unmap any remaining paged data */
330 if (dma_unmap_len(tx_buffer, len)) {
331 dma_unmap_page(tx_ring->dev,
332 dma_unmap_addr(tx_buffer, dma),
333 dma_unmap_len(tx_buffer, len),
334 DMA_TO_DEVICE);
335 dma_unmap_len_set(tx_buffer, len, 0);
336 }
337 }
338
339 /* move us one more past the eop_desc for start of next pkt */
340 tx_buffer++;
341 tx_desc++;
342 i++;
343 if (unlikely(!i)) {
344 i -= tx_ring->count;
345 tx_buffer = tx_ring->tx_buffer_info;
346 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
347 }
348
349 /* issue prefetch for next Tx descriptor */
350 prefetch(tx_desc);
351
352 /* update budget accounting */
353 budget--;
354 } while (likely(budget));
355
356 i += tx_ring->count;
357 tx_ring->next_to_clean = i;
358 u64_stats_update_begin(&tx_ring->syncp);
359 tx_ring->stats.bytes += total_bytes;
360 tx_ring->stats.packets += total_packets;
361 u64_stats_update_end(&tx_ring->syncp);
362 q_vector->tx.total_bytes += total_bytes;
363 q_vector->tx.total_packets += total_packets;
364 adapter->tx_ipsec += total_ipsec;
365
366 if (check_for_tx_hang(tx_ring) && ixgbevf_check_tx_hang(tx_ring)) {
367 struct ixgbe_hw *hw = &adapter->hw;
368 union ixgbe_adv_tx_desc *eop_desc;
369
370 eop_desc = tx_ring->tx_buffer_info[i].next_to_watch;
371
372 pr_err("Detected Tx Unit Hang%s\n"
373 " Tx Queue <%d>\n"
374 " TDH, TDT <%x>, <%x>\n"
375 " next_to_use <%x>\n"
376 " next_to_clean <%x>\n"
377 "tx_buffer_info[next_to_clean]\n"
378 " next_to_watch <%p>\n"
379 " eop_desc->wb.status <%x>\n"
380 " time_stamp <%lx>\n"
381 " jiffies <%lx>\n",
382 ring_is_xdp(tx_ring) ? " XDP" : "",
383 tx_ring->queue_index,
384 IXGBE_READ_REG(hw, IXGBE_VFTDH(tx_ring->reg_idx)),
385 IXGBE_READ_REG(hw, IXGBE_VFTDT(tx_ring->reg_idx)),
386 tx_ring->next_to_use, i,
387 eop_desc, (eop_desc ? eop_desc->wb.status : 0),
388 tx_ring->tx_buffer_info[i].time_stamp, jiffies);
389
390 if (!ring_is_xdp(tx_ring))
391 netif_stop_subqueue(tx_ring->netdev,
392 tx_ring->queue_index);
393
394 /* schedule immediate reset if we believe we hung */
395 ixgbevf_tx_timeout_reset(adapter);
396
397 return true;
398 }
399
400 if (ring_is_xdp(tx_ring))
401 return !!budget;
402
403#define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
404 if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
405 (ixgbevf_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
406 /* Make sure that anybody stopping the queue after this
407 * sees the new next_to_clean.
408 */
409 smp_mb();
410
411 if (__netif_subqueue_stopped(tx_ring->netdev,
412 tx_ring->queue_index) &&
413 !test_bit(__IXGBEVF_DOWN, &adapter->state)) {
414 netif_wake_subqueue(tx_ring->netdev,
415 tx_ring->queue_index);
416 ++tx_ring->tx_stats.restart_queue;
417 }
418 }
419
420 return !!budget;
421}
422
423/**
424 * ixgbevf_rx_skb - Helper function to determine proper Rx method
425 * @q_vector: structure containing interrupt and ring information
426 * @skb: packet to send up
427 **/
428static void ixgbevf_rx_skb(struct ixgbevf_q_vector *q_vector,
429 struct sk_buff *skb)
430{
431 napi_gro_receive(&q_vector->napi, skb);
432}
433
434#define IXGBE_RSS_L4_TYPES_MASK \
435 ((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \
436 (1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \
437 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \
438 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP))
439
440static inline void ixgbevf_rx_hash(struct ixgbevf_ring *ring,
441 union ixgbe_adv_rx_desc *rx_desc,
442 struct sk_buff *skb)
443{
444 u16 rss_type;
445
446 if (!(ring->netdev->features & NETIF_F_RXHASH))
447 return;
448
449 rss_type = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.pkt_info) &
450 IXGBE_RXDADV_RSSTYPE_MASK;
451
452 if (!rss_type)
453 return;
454
455 skb_set_hash(skb, le32_to_cpu(rx_desc->wb.lower.hi_dword.rss),
456 (IXGBE_RSS_L4_TYPES_MASK & (1ul << rss_type)) ?
457 PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
458}
459
460/**
461 * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
462 * @ring: structure containig ring specific data
463 * @rx_desc: current Rx descriptor being processed
464 * @skb: skb currently being received and modified
465 **/
466static inline void ixgbevf_rx_checksum(struct ixgbevf_ring *ring,
467 union ixgbe_adv_rx_desc *rx_desc,
468 struct sk_buff *skb)
469{
470 skb_checksum_none_assert(skb);
471
472 /* Rx csum disabled */
473 if (!(ring->netdev->features & NETIF_F_RXCSUM))
474 return;
475
476 /* if IP and error */
477 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) &&
478 ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) {
479 ring->rx_stats.csum_err++;
480 return;
481 }
482
483 if (!ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS))
484 return;
485
486 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) {
487 ring->rx_stats.csum_err++;
488 return;
489 }
490
491 /* It must be a TCP or UDP packet with a valid checksum */
492 skb->ip_summed = CHECKSUM_UNNECESSARY;
493}
494
495/**
496 * ixgbevf_process_skb_fields - Populate skb header fields from Rx descriptor
497 * @rx_ring: rx descriptor ring packet is being transacted on
498 * @rx_desc: pointer to the EOP Rx descriptor
499 * @skb: pointer to current skb being populated
500 *
501 * This function checks the ring, descriptor, and packet information in
502 * order to populate the checksum, VLAN, protocol, and other fields within
503 * the skb.
504 **/
505static void ixgbevf_process_skb_fields(struct ixgbevf_ring *rx_ring,
506 union ixgbe_adv_rx_desc *rx_desc,
507 struct sk_buff *skb)
508{
509 ixgbevf_rx_hash(rx_ring, rx_desc, skb);
510 ixgbevf_rx_checksum(rx_ring, rx_desc, skb);
511
512 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) {
513 u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan);
514 unsigned long *active_vlans = netdev_priv(rx_ring->netdev);
515
516 if (test_bit(vid & VLAN_VID_MASK, active_vlans))
517 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
518 }
519
520 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_STAT_SECP))
521 ixgbevf_ipsec_rx(rx_ring, rx_desc, skb);
522
523 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
524}
525
526static
527struct ixgbevf_rx_buffer *ixgbevf_get_rx_buffer(struct ixgbevf_ring *rx_ring,
528 const unsigned int size)
529{
530 struct ixgbevf_rx_buffer *rx_buffer;
531
532 rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
533 prefetchw(rx_buffer->page);
534
535 /* we are reusing so sync this buffer for CPU use */
536 dma_sync_single_range_for_cpu(rx_ring->dev,
537 rx_buffer->dma,
538 rx_buffer->page_offset,
539 size,
540 DMA_FROM_DEVICE);
541
542 rx_buffer->pagecnt_bias--;
543
544 return rx_buffer;
545}
546
547static void ixgbevf_put_rx_buffer(struct ixgbevf_ring *rx_ring,
548 struct ixgbevf_rx_buffer *rx_buffer,
549 struct sk_buff *skb)
550{
551 if (ixgbevf_can_reuse_rx_page(rx_buffer)) {
552 /* hand second half of page back to the ring */
553 ixgbevf_reuse_rx_page(rx_ring, rx_buffer);
554 } else {
555 if (IS_ERR(skb))
556 /* We are not reusing the buffer so unmap it and free
557 * any references we are holding to it
558 */
559 dma_unmap_page_attrs(rx_ring->dev, rx_buffer->dma,
560 ixgbevf_rx_pg_size(rx_ring),
561 DMA_FROM_DEVICE,
562 IXGBEVF_RX_DMA_ATTR);
563 __page_frag_cache_drain(rx_buffer->page,
564 rx_buffer->pagecnt_bias);
565 }
566
567 /* clear contents of rx_buffer */
568 rx_buffer->page = NULL;
569}
570
571/**
572 * ixgbevf_is_non_eop - process handling of non-EOP buffers
573 * @rx_ring: Rx ring being processed
574 * @rx_desc: Rx descriptor for current buffer
575 *
576 * This function updates next to clean. If the buffer is an EOP buffer
577 * this function exits returning false, otherwise it will place the
578 * sk_buff in the next buffer to be chained and return true indicating
579 * that this is in fact a non-EOP buffer.
580 **/
581static bool ixgbevf_is_non_eop(struct ixgbevf_ring *rx_ring,
582 union ixgbe_adv_rx_desc *rx_desc)
583{
584 u32 ntc = rx_ring->next_to_clean + 1;
585
586 /* fetch, update, and store next to clean */
587 ntc = (ntc < rx_ring->count) ? ntc : 0;
588 rx_ring->next_to_clean = ntc;
589
590 prefetch(IXGBEVF_RX_DESC(rx_ring, ntc));
591
592 if (likely(ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
593 return false;
594
595 return true;
596}
597
598static inline unsigned int ixgbevf_rx_offset(struct ixgbevf_ring *rx_ring)
599{
600 return ring_uses_build_skb(rx_ring) ? IXGBEVF_SKB_PAD : 0;
601}
602
603static bool ixgbevf_alloc_mapped_page(struct ixgbevf_ring *rx_ring,
604 struct ixgbevf_rx_buffer *bi)
605{
606 struct page *page = bi->page;
607 dma_addr_t dma;
608
609 /* since we are recycling buffers we should seldom need to alloc */
610 if (likely(page))
611 return true;
612
613 /* alloc new page for storage */
614 page = dev_alloc_pages(ixgbevf_rx_pg_order(rx_ring));
615 if (unlikely(!page)) {
616 rx_ring->rx_stats.alloc_rx_page_failed++;
617 return false;
618 }
619
620 /* map page for use */
621 dma = dma_map_page_attrs(rx_ring->dev, page, 0,
622 ixgbevf_rx_pg_size(rx_ring),
623 DMA_FROM_DEVICE, IXGBEVF_RX_DMA_ATTR);
624
625 /* if mapping failed free memory back to system since
626 * there isn't much point in holding memory we can't use
627 */
628 if (dma_mapping_error(rx_ring->dev, dma)) {
629 __free_pages(page, ixgbevf_rx_pg_order(rx_ring));
630
631 rx_ring->rx_stats.alloc_rx_page_failed++;
632 return false;
633 }
634
635 bi->dma = dma;
636 bi->page = page;
637 bi->page_offset = ixgbevf_rx_offset(rx_ring);
638 bi->pagecnt_bias = 1;
639 rx_ring->rx_stats.alloc_rx_page++;
640
641 return true;
642}
643
644/**
645 * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
646 * @rx_ring: rx descriptor ring (for a specific queue) to setup buffers on
647 * @cleaned_count: number of buffers to replace
648 **/
649static void ixgbevf_alloc_rx_buffers(struct ixgbevf_ring *rx_ring,
650 u16 cleaned_count)
651{
652 union ixgbe_adv_rx_desc *rx_desc;
653 struct ixgbevf_rx_buffer *bi;
654 unsigned int i = rx_ring->next_to_use;
655
656 /* nothing to do or no valid netdev defined */
657 if (!cleaned_count || !rx_ring->netdev)
658 return;
659
660 rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
661 bi = &rx_ring->rx_buffer_info[i];
662 i -= rx_ring->count;
663
664 do {
665 if (!ixgbevf_alloc_mapped_page(rx_ring, bi))
666 break;
667
668 /* sync the buffer for use by the device */
669 dma_sync_single_range_for_device(rx_ring->dev, bi->dma,
670 bi->page_offset,
671 ixgbevf_rx_bufsz(rx_ring),
672 DMA_FROM_DEVICE);
673
674 /* Refresh the desc even if pkt_addr didn't change
675 * because each write-back erases this info.
676 */
677 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);
678
679 rx_desc++;
680 bi++;
681 i++;
682 if (unlikely(!i)) {
683 rx_desc = IXGBEVF_RX_DESC(rx_ring, 0);
684 bi = rx_ring->rx_buffer_info;
685 i -= rx_ring->count;
686 }
687
688 /* clear the length for the next_to_use descriptor */
689 rx_desc->wb.upper.length = 0;
690
691 cleaned_count--;
692 } while (cleaned_count);
693
694 i += rx_ring->count;
695
696 if (rx_ring->next_to_use != i) {
697 /* record the next descriptor to use */
698 rx_ring->next_to_use = i;
699
700 /* update next to alloc since we have filled the ring */
701 rx_ring->next_to_alloc = i;
702
703 /* Force memory writes to complete before letting h/w
704 * know there are new descriptors to fetch. (Only
705 * applicable for weak-ordered memory model archs,
706 * such as IA-64).
707 */
708 wmb();
709 ixgbevf_write_tail(rx_ring, i);
710 }
711}
712
713/**
714 * ixgbevf_cleanup_headers - Correct corrupted or empty headers
715 * @rx_ring: rx descriptor ring packet is being transacted on
716 * @rx_desc: pointer to the EOP Rx descriptor
717 * @skb: pointer to current skb being fixed
718 *
719 * Check for corrupted packet headers caused by senders on the local L2
720 * embedded NIC switch not setting up their Tx Descriptors right. These
721 * should be very rare.
722 *
723 * Also address the case where we are pulling data in on pages only
724 * and as such no data is present in the skb header.
725 *
726 * In addition if skb is not at least 60 bytes we need to pad it so that
727 * it is large enough to qualify as a valid Ethernet frame.
728 *
729 * Returns true if an error was encountered and skb was freed.
730 **/
731static bool ixgbevf_cleanup_headers(struct ixgbevf_ring *rx_ring,
732 union ixgbe_adv_rx_desc *rx_desc,
733 struct sk_buff *skb)
734{
735 /* XDP packets use error pointer so abort at this point */
736 if (IS_ERR(skb))
737 return true;
738
739 /* verify that the packet does not have any known errors */
740 if (unlikely(ixgbevf_test_staterr(rx_desc,
741 IXGBE_RXDADV_ERR_FRAME_ERR_MASK))) {
742 struct net_device *netdev = rx_ring->netdev;
743
744 if (!(netdev->features & NETIF_F_RXALL)) {
745 dev_kfree_skb_any(skb);
746 return true;
747 }
748 }
749
750 /* if eth_skb_pad returns an error the skb was freed */
751 if (eth_skb_pad(skb))
752 return true;
753
754 return false;
755}
756
757/**
758 * ixgbevf_reuse_rx_page - page flip buffer and store it back on the ring
759 * @rx_ring: rx descriptor ring to store buffers on
760 * @old_buff: donor buffer to have page reused
761 *
762 * Synchronizes page for reuse by the adapter
763 **/
764static void ixgbevf_reuse_rx_page(struct ixgbevf_ring *rx_ring,
765 struct ixgbevf_rx_buffer *old_buff)
766{
767 struct ixgbevf_rx_buffer *new_buff;
768 u16 nta = rx_ring->next_to_alloc;
769
770 new_buff = &rx_ring->rx_buffer_info[nta];
771
772 /* update, and store next to alloc */
773 nta++;
774 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
775
776 /* transfer page from old buffer to new buffer */
777 new_buff->page = old_buff->page;
778 new_buff->dma = old_buff->dma;
779 new_buff->page_offset = old_buff->page_offset;
780 new_buff->pagecnt_bias = old_buff->pagecnt_bias;
781}
782
783static bool ixgbevf_can_reuse_rx_page(struct ixgbevf_rx_buffer *rx_buffer)
784{
785 unsigned int pagecnt_bias = rx_buffer->pagecnt_bias;
786 struct page *page = rx_buffer->page;
787
788 /* avoid re-using remote and pfmemalloc pages */
789 if (!dev_page_is_reusable(page))
790 return false;
791
792#if (PAGE_SIZE < 8192)
793 /* if we are only owner of page we can reuse it */
794 if (unlikely((page_ref_count(page) - pagecnt_bias) > 1))
795 return false;
796#else
797#define IXGBEVF_LAST_OFFSET \
798 (SKB_WITH_OVERHEAD(PAGE_SIZE) - IXGBEVF_RXBUFFER_2048)
799
800 if (rx_buffer->page_offset > IXGBEVF_LAST_OFFSET)
801 return false;
802
803#endif
804
805 /* If we have drained the page fragment pool we need to update
806 * the pagecnt_bias and page count so that we fully restock the
807 * number of references the driver holds.
808 */
809 if (unlikely(!pagecnt_bias)) {
810 page_ref_add(page, USHRT_MAX);
811 rx_buffer->pagecnt_bias = USHRT_MAX;
812 }
813
814 return true;
815}
816
817/**
818 * ixgbevf_add_rx_frag - Add contents of Rx buffer to sk_buff
819 * @rx_ring: rx descriptor ring to transact packets on
820 * @rx_buffer: buffer containing page to add
821 * @skb: sk_buff to place the data into
822 * @size: size of buffer to be added
823 *
824 * This function will add the data contained in rx_buffer->page to the skb.
825 **/
826static void ixgbevf_add_rx_frag(struct ixgbevf_ring *rx_ring,
827 struct ixgbevf_rx_buffer *rx_buffer,
828 struct sk_buff *skb,
829 unsigned int size)
830{
831#if (PAGE_SIZE < 8192)
832 unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
833#else
834 unsigned int truesize = ring_uses_build_skb(rx_ring) ?
835 SKB_DATA_ALIGN(IXGBEVF_SKB_PAD + size) :
836 SKB_DATA_ALIGN(size);
837#endif
838 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_buffer->page,
839 rx_buffer->page_offset, size, truesize);
840#if (PAGE_SIZE < 8192)
841 rx_buffer->page_offset ^= truesize;
842#else
843 rx_buffer->page_offset += truesize;
844#endif
845}
846
847static
848struct sk_buff *ixgbevf_construct_skb(struct ixgbevf_ring *rx_ring,
849 struct ixgbevf_rx_buffer *rx_buffer,
850 struct xdp_buff *xdp,
851 union ixgbe_adv_rx_desc *rx_desc)
852{
853 unsigned int size = xdp->data_end - xdp->data;
854#if (PAGE_SIZE < 8192)
855 unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
856#else
857 unsigned int truesize = SKB_DATA_ALIGN(xdp->data_end -
858 xdp->data_hard_start);
859#endif
860 unsigned int headlen;
861 struct sk_buff *skb;
862
863 /* prefetch first cache line of first page */
864 net_prefetch(xdp->data);
865
866 /* Note, we get here by enabling legacy-rx via:
867 *
868 * ethtool --set-priv-flags <dev> legacy-rx on
869 *
870 * In this mode, we currently get 0 extra XDP headroom as
871 * opposed to having legacy-rx off, where we process XDP
872 * packets going to stack via ixgbevf_build_skb().
873 *
874 * For ixgbevf_construct_skb() mode it means that the
875 * xdp->data_meta will always point to xdp->data, since
876 * the helper cannot expand the head. Should this ever
877 * changed in future for legacy-rx mode on, then lets also
878 * add xdp->data_meta handling here.
879 */
880
881 /* allocate a skb to store the frags */
882 skb = napi_alloc_skb(&rx_ring->q_vector->napi, IXGBEVF_RX_HDR_SIZE);
883 if (unlikely(!skb))
884 return NULL;
885
886 /* Determine available headroom for copy */
887 headlen = size;
888 if (headlen > IXGBEVF_RX_HDR_SIZE)
889 headlen = eth_get_headlen(skb->dev, xdp->data,
890 IXGBEVF_RX_HDR_SIZE);
891
892 /* align pull length to size of long to optimize memcpy performance */
893 memcpy(__skb_put(skb, headlen), xdp->data,
894 ALIGN(headlen, sizeof(long)));
895
896 /* update all of the pointers */
897 size -= headlen;
898 if (size) {
899 skb_add_rx_frag(skb, 0, rx_buffer->page,
900 (xdp->data + headlen) -
901 page_address(rx_buffer->page),
902 size, truesize);
903#if (PAGE_SIZE < 8192)
904 rx_buffer->page_offset ^= truesize;
905#else
906 rx_buffer->page_offset += truesize;
907#endif
908 } else {
909 rx_buffer->pagecnt_bias++;
910 }
911
912 return skb;
913}
914
915static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter,
916 u32 qmask)
917{
918 struct ixgbe_hw *hw = &adapter->hw;
919
920 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, qmask);
921}
922
923static struct sk_buff *ixgbevf_build_skb(struct ixgbevf_ring *rx_ring,
924 struct ixgbevf_rx_buffer *rx_buffer,
925 struct xdp_buff *xdp,
926 union ixgbe_adv_rx_desc *rx_desc)
927{
928 unsigned int metasize = xdp->data - xdp->data_meta;
929#if (PAGE_SIZE < 8192)
930 unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
931#else
932 unsigned int truesize = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) +
933 SKB_DATA_ALIGN(xdp->data_end -
934 xdp->data_hard_start);
935#endif
936 struct sk_buff *skb;
937
938 /* Prefetch first cache line of first page. If xdp->data_meta
939 * is unused, this points to xdp->data, otherwise, we likely
940 * have a consumer accessing first few bytes of meta data,
941 * and then actual data.
942 */
943 net_prefetch(xdp->data_meta);
944
945 /* build an skb around the page buffer */
946 skb = napi_build_skb(xdp->data_hard_start, truesize);
947 if (unlikely(!skb))
948 return NULL;
949
950 /* update pointers within the skb to store the data */
951 skb_reserve(skb, xdp->data - xdp->data_hard_start);
952 __skb_put(skb, xdp->data_end - xdp->data);
953 if (metasize)
954 skb_metadata_set(skb, metasize);
955
956 /* update buffer offset */
957#if (PAGE_SIZE < 8192)
958 rx_buffer->page_offset ^= truesize;
959#else
960 rx_buffer->page_offset += truesize;
961#endif
962
963 return skb;
964}
965
966#define IXGBEVF_XDP_PASS 0
967#define IXGBEVF_XDP_CONSUMED 1
968#define IXGBEVF_XDP_TX 2
969
970static int ixgbevf_xmit_xdp_ring(struct ixgbevf_ring *ring,
971 struct xdp_buff *xdp)
972{
973 struct ixgbevf_tx_buffer *tx_buffer;
974 union ixgbe_adv_tx_desc *tx_desc;
975 u32 len, cmd_type;
976 dma_addr_t dma;
977 u16 i;
978
979 len = xdp->data_end - xdp->data;
980
981 if (unlikely(!ixgbevf_desc_unused(ring)))
982 return IXGBEVF_XDP_CONSUMED;
983
984 dma = dma_map_single(ring->dev, xdp->data, len, DMA_TO_DEVICE);
985 if (dma_mapping_error(ring->dev, dma))
986 return IXGBEVF_XDP_CONSUMED;
987
988 /* record the location of the first descriptor for this packet */
989 i = ring->next_to_use;
990 tx_buffer = &ring->tx_buffer_info[i];
991
992 dma_unmap_len_set(tx_buffer, len, len);
993 dma_unmap_addr_set(tx_buffer, dma, dma);
994 tx_buffer->data = xdp->data;
995 tx_buffer->bytecount = len;
996 tx_buffer->gso_segs = 1;
997 tx_buffer->protocol = 0;
998
999 /* Populate minimal context descriptor that will provide for the
1000 * fact that we are expected to process Ethernet frames.
1001 */
1002 if (!test_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state)) {
1003 struct ixgbe_adv_tx_context_desc *context_desc;
1004
1005 set_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state);
1006
1007 context_desc = IXGBEVF_TX_CTXTDESC(ring, 0);
1008 context_desc->vlan_macip_lens =
1009 cpu_to_le32(ETH_HLEN << IXGBE_ADVTXD_MACLEN_SHIFT);
1010 context_desc->fceof_saidx = 0;
1011 context_desc->type_tucmd_mlhl =
1012 cpu_to_le32(IXGBE_TXD_CMD_DEXT |
1013 IXGBE_ADVTXD_DTYP_CTXT);
1014 context_desc->mss_l4len_idx = 0;
1015
1016 i = 1;
1017 }
1018
1019 /* put descriptor type bits */
1020 cmd_type = IXGBE_ADVTXD_DTYP_DATA |
1021 IXGBE_ADVTXD_DCMD_DEXT |
1022 IXGBE_ADVTXD_DCMD_IFCS;
1023 cmd_type |= len | IXGBE_TXD_CMD;
1024
1025 tx_desc = IXGBEVF_TX_DESC(ring, i);
1026 tx_desc->read.buffer_addr = cpu_to_le64(dma);
1027
1028 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
1029 tx_desc->read.olinfo_status =
1030 cpu_to_le32((len << IXGBE_ADVTXD_PAYLEN_SHIFT) |
1031 IXGBE_ADVTXD_CC);
1032
1033 /* Avoid any potential race with cleanup */
1034 smp_wmb();
1035
1036 /* set next_to_watch value indicating a packet is present */
1037 i++;
1038 if (i == ring->count)
1039 i = 0;
1040
1041 tx_buffer->next_to_watch = tx_desc;
1042 ring->next_to_use = i;
1043
1044 return IXGBEVF_XDP_TX;
1045}
1046
1047static struct sk_buff *ixgbevf_run_xdp(struct ixgbevf_adapter *adapter,
1048 struct ixgbevf_ring *rx_ring,
1049 struct xdp_buff *xdp)
1050{
1051 int result = IXGBEVF_XDP_PASS;
1052 struct ixgbevf_ring *xdp_ring;
1053 struct bpf_prog *xdp_prog;
1054 u32 act;
1055
1056 xdp_prog = READ_ONCE(rx_ring->xdp_prog);
1057
1058 if (!xdp_prog)
1059 goto xdp_out;
1060
1061 act = bpf_prog_run_xdp(xdp_prog, xdp);
1062 switch (act) {
1063 case XDP_PASS:
1064 break;
1065 case XDP_TX:
1066 xdp_ring = adapter->xdp_ring[rx_ring->queue_index];
1067 result = ixgbevf_xmit_xdp_ring(xdp_ring, xdp);
1068 if (result == IXGBEVF_XDP_CONSUMED)
1069 goto out_failure;
1070 break;
1071 default:
1072 bpf_warn_invalid_xdp_action(rx_ring->netdev, xdp_prog, act);
1073 fallthrough;
1074 case XDP_ABORTED:
1075out_failure:
1076 trace_xdp_exception(rx_ring->netdev, xdp_prog, act);
1077 fallthrough; /* handle aborts by dropping packet */
1078 case XDP_DROP:
1079 result = IXGBEVF_XDP_CONSUMED;
1080 break;
1081 }
1082xdp_out:
1083 return ERR_PTR(-result);
1084}
1085
1086static unsigned int ixgbevf_rx_frame_truesize(struct ixgbevf_ring *rx_ring,
1087 unsigned int size)
1088{
1089 unsigned int truesize;
1090
1091#if (PAGE_SIZE < 8192)
1092 truesize = ixgbevf_rx_pg_size(rx_ring) / 2; /* Must be power-of-2 */
1093#else
1094 truesize = ring_uses_build_skb(rx_ring) ?
1095 SKB_DATA_ALIGN(IXGBEVF_SKB_PAD + size) +
1096 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) :
1097 SKB_DATA_ALIGN(size);
1098#endif
1099 return truesize;
1100}
1101
1102static void ixgbevf_rx_buffer_flip(struct ixgbevf_ring *rx_ring,
1103 struct ixgbevf_rx_buffer *rx_buffer,
1104 unsigned int size)
1105{
1106 unsigned int truesize = ixgbevf_rx_frame_truesize(rx_ring, size);
1107
1108#if (PAGE_SIZE < 8192)
1109 rx_buffer->page_offset ^= truesize;
1110#else
1111 rx_buffer->page_offset += truesize;
1112#endif
1113}
1114
1115static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
1116 struct ixgbevf_ring *rx_ring,
1117 int budget)
1118{
1119 unsigned int total_rx_bytes = 0, total_rx_packets = 0, frame_sz = 0;
1120 struct ixgbevf_adapter *adapter = q_vector->adapter;
1121 u16 cleaned_count = ixgbevf_desc_unused(rx_ring);
1122 struct sk_buff *skb = rx_ring->skb;
1123 bool xdp_xmit = false;
1124 struct xdp_buff xdp;
1125
1126 /* Frame size depend on rx_ring setup when PAGE_SIZE=4K */
1127#if (PAGE_SIZE < 8192)
1128 frame_sz = ixgbevf_rx_frame_truesize(rx_ring, 0);
1129#endif
1130 xdp_init_buff(&xdp, frame_sz, &rx_ring->xdp_rxq);
1131
1132 while (likely(total_rx_packets < budget)) {
1133 struct ixgbevf_rx_buffer *rx_buffer;
1134 union ixgbe_adv_rx_desc *rx_desc;
1135 unsigned int size;
1136
1137 /* return some buffers to hardware, one at a time is too slow */
1138 if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) {
1139 ixgbevf_alloc_rx_buffers(rx_ring, cleaned_count);
1140 cleaned_count = 0;
1141 }
1142
1143 rx_desc = IXGBEVF_RX_DESC(rx_ring, rx_ring->next_to_clean);
1144 size = le16_to_cpu(rx_desc->wb.upper.length);
1145 if (!size)
1146 break;
1147
1148 /* This memory barrier is needed to keep us from reading
1149 * any other fields out of the rx_desc until we know the
1150 * RXD_STAT_DD bit is set
1151 */
1152 rmb();
1153
1154 rx_buffer = ixgbevf_get_rx_buffer(rx_ring, size);
1155
1156 /* retrieve a buffer from the ring */
1157 if (!skb) {
1158 unsigned int offset = ixgbevf_rx_offset(rx_ring);
1159 unsigned char *hard_start;
1160
1161 hard_start = page_address(rx_buffer->page) +
1162 rx_buffer->page_offset - offset;
1163 xdp_prepare_buff(&xdp, hard_start, offset, size, true);
1164#if (PAGE_SIZE > 4096)
1165 /* At larger PAGE_SIZE, frame_sz depend on len size */
1166 xdp.frame_sz = ixgbevf_rx_frame_truesize(rx_ring, size);
1167#endif
1168 skb = ixgbevf_run_xdp(adapter, rx_ring, &xdp);
1169 }
1170
1171 if (IS_ERR(skb)) {
1172 if (PTR_ERR(skb) == -IXGBEVF_XDP_TX) {
1173 xdp_xmit = true;
1174 ixgbevf_rx_buffer_flip(rx_ring, rx_buffer,
1175 size);
1176 } else {
1177 rx_buffer->pagecnt_bias++;
1178 }
1179 total_rx_packets++;
1180 total_rx_bytes += size;
1181 } else if (skb) {
1182 ixgbevf_add_rx_frag(rx_ring, rx_buffer, skb, size);
1183 } else if (ring_uses_build_skb(rx_ring)) {
1184 skb = ixgbevf_build_skb(rx_ring, rx_buffer,
1185 &xdp, rx_desc);
1186 } else {
1187 skb = ixgbevf_construct_skb(rx_ring, rx_buffer,
1188 &xdp, rx_desc);
1189 }
1190
1191 /* exit if we failed to retrieve a buffer */
1192 if (!skb) {
1193 rx_ring->rx_stats.alloc_rx_buff_failed++;
1194 rx_buffer->pagecnt_bias++;
1195 break;
1196 }
1197
1198 ixgbevf_put_rx_buffer(rx_ring, rx_buffer, skb);
1199 cleaned_count++;
1200
1201 /* fetch next buffer in frame if non-eop */
1202 if (ixgbevf_is_non_eop(rx_ring, rx_desc))
1203 continue;
1204
1205 /* verify the packet layout is correct */
1206 if (ixgbevf_cleanup_headers(rx_ring, rx_desc, skb)) {
1207 skb = NULL;
1208 continue;
1209 }
1210
1211 /* probably a little skewed due to removing CRC */
1212 total_rx_bytes += skb->len;
1213
1214 /* Workaround hardware that can't do proper VEPA multicast
1215 * source pruning.
1216 */
1217 if ((skb->pkt_type == PACKET_BROADCAST ||
1218 skb->pkt_type == PACKET_MULTICAST) &&
1219 ether_addr_equal(rx_ring->netdev->dev_addr,
1220 eth_hdr(skb)->h_source)) {
1221 dev_kfree_skb_irq(skb);
1222 continue;
1223 }
1224
1225 /* populate checksum, VLAN, and protocol */
1226 ixgbevf_process_skb_fields(rx_ring, rx_desc, skb);
1227
1228 ixgbevf_rx_skb(q_vector, skb);
1229
1230 /* reset skb pointer */
1231 skb = NULL;
1232
1233 /* update budget accounting */
1234 total_rx_packets++;
1235 }
1236
1237 /* place incomplete frames back on ring for completion */
1238 rx_ring->skb = skb;
1239
1240 if (xdp_xmit) {
1241 struct ixgbevf_ring *xdp_ring =
1242 adapter->xdp_ring[rx_ring->queue_index];
1243
1244 /* Force memory writes to complete before letting h/w
1245 * know there are new descriptors to fetch.
1246 */
1247 wmb();
1248 ixgbevf_write_tail(xdp_ring, xdp_ring->next_to_use);
1249 }
1250
1251 u64_stats_update_begin(&rx_ring->syncp);
1252 rx_ring->stats.packets += total_rx_packets;
1253 rx_ring->stats.bytes += total_rx_bytes;
1254 u64_stats_update_end(&rx_ring->syncp);
1255 q_vector->rx.total_packets += total_rx_packets;
1256 q_vector->rx.total_bytes += total_rx_bytes;
1257
1258 return total_rx_packets;
1259}
1260
1261/**
1262 * ixgbevf_poll - NAPI polling calback
1263 * @napi: napi struct with our devices info in it
1264 * @budget: amount of work driver is allowed to do this pass, in packets
1265 *
1266 * This function will clean more than one or more rings associated with a
1267 * q_vector.
1268 **/
1269static int ixgbevf_poll(struct napi_struct *napi, int budget)
1270{
1271 struct ixgbevf_q_vector *q_vector =
1272 container_of(napi, struct ixgbevf_q_vector, napi);
1273 struct ixgbevf_adapter *adapter = q_vector->adapter;
1274 struct ixgbevf_ring *ring;
1275 int per_ring_budget, work_done = 0;
1276 bool clean_complete = true;
1277
1278 ixgbevf_for_each_ring(ring, q_vector->tx) {
1279 if (!ixgbevf_clean_tx_irq(q_vector, ring, budget))
1280 clean_complete = false;
1281 }
1282
1283 if (budget <= 0)
1284 return budget;
1285
1286 /* attempt to distribute budget to each queue fairly, but don't allow
1287 * the budget to go below 1 because we'll exit polling
1288 */
1289 if (q_vector->rx.count > 1)
1290 per_ring_budget = max(budget/q_vector->rx.count, 1);
1291 else
1292 per_ring_budget = budget;
1293
1294 ixgbevf_for_each_ring(ring, q_vector->rx) {
1295 int cleaned = ixgbevf_clean_rx_irq(q_vector, ring,
1296 per_ring_budget);
1297 work_done += cleaned;
1298 if (cleaned >= per_ring_budget)
1299 clean_complete = false;
1300 }
1301
1302 /* If all work not completed, return budget and keep polling */
1303 if (!clean_complete)
1304 return budget;
1305
1306 /* Exit the polling mode, but don't re-enable interrupts if stack might
1307 * poll us due to busy-polling
1308 */
1309 if (likely(napi_complete_done(napi, work_done))) {
1310 if (adapter->rx_itr_setting == 1)
1311 ixgbevf_set_itr(q_vector);
1312 if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&
1313 !test_bit(__IXGBEVF_REMOVING, &adapter->state))
1314 ixgbevf_irq_enable_queues(adapter,
1315 BIT(q_vector->v_idx));
1316 }
1317
1318 return min(work_done, budget - 1);
1319}
1320
1321/**
1322 * ixgbevf_write_eitr - write VTEITR register in hardware specific way
1323 * @q_vector: structure containing interrupt and ring information
1324 **/
1325void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector)
1326{
1327 struct ixgbevf_adapter *adapter = q_vector->adapter;
1328 struct ixgbe_hw *hw = &adapter->hw;
1329 int v_idx = q_vector->v_idx;
1330 u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
1331
1332 /* set the WDIS bit to not clear the timer bits and cause an
1333 * immediate assertion of the interrupt
1334 */
1335 itr_reg |= IXGBE_EITR_CNT_WDIS;
1336
1337 IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg);
1338}
1339
1340/**
1341 * ixgbevf_configure_msix - Configure MSI-X hardware
1342 * @adapter: board private structure
1343 *
1344 * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
1345 * interrupts.
1346 **/
1347static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter)
1348{
1349 struct ixgbevf_q_vector *q_vector;
1350 int q_vectors, v_idx;
1351
1352 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1353 adapter->eims_enable_mask = 0;
1354
1355 /* Populate the IVAR table and set the ITR values to the
1356 * corresponding register.
1357 */
1358 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1359 struct ixgbevf_ring *ring;
1360
1361 q_vector = adapter->q_vector[v_idx];
1362
1363 ixgbevf_for_each_ring(ring, q_vector->rx)
1364 ixgbevf_set_ivar(adapter, 0, ring->reg_idx, v_idx);
1365
1366 ixgbevf_for_each_ring(ring, q_vector->tx)
1367 ixgbevf_set_ivar(adapter, 1, ring->reg_idx, v_idx);
1368
1369 if (q_vector->tx.ring && !q_vector->rx.ring) {
1370 /* Tx only vector */
1371 if (adapter->tx_itr_setting == 1)
1372 q_vector->itr = IXGBE_12K_ITR;
1373 else
1374 q_vector->itr = adapter->tx_itr_setting;
1375 } else {
1376 /* Rx or Rx/Tx vector */
1377 if (adapter->rx_itr_setting == 1)
1378 q_vector->itr = IXGBE_20K_ITR;
1379 else
1380 q_vector->itr = adapter->rx_itr_setting;
1381 }
1382
1383 /* add q_vector eims value to global eims_enable_mask */
1384 adapter->eims_enable_mask |= BIT(v_idx);
1385
1386 ixgbevf_write_eitr(q_vector);
1387 }
1388
1389 ixgbevf_set_ivar(adapter, -1, 1, v_idx);
1390 /* setup eims_other and add value to global eims_enable_mask */
1391 adapter->eims_other = BIT(v_idx);
1392 adapter->eims_enable_mask |= adapter->eims_other;
1393}
1394
1395enum latency_range {
1396 lowest_latency = 0,
1397 low_latency = 1,
1398 bulk_latency = 2,
1399 latency_invalid = 255
1400};
1401
1402/**
1403 * ixgbevf_update_itr - update the dynamic ITR value based on statistics
1404 * @q_vector: structure containing interrupt and ring information
1405 * @ring_container: structure containing ring performance data
1406 *
1407 * Stores a new ITR value based on packets and byte
1408 * counts during the last interrupt. The advantage of per interrupt
1409 * computation is faster updates and more accurate ITR for the current
1410 * traffic pattern. Constants in this function were computed
1411 * based on theoretical maximum wire speed and thresholds were set based
1412 * on testing data as well as attempting to minimize response time
1413 * while increasing bulk throughput.
1414 **/
1415static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector,
1416 struct ixgbevf_ring_container *ring_container)
1417{
1418 int bytes = ring_container->total_bytes;
1419 int packets = ring_container->total_packets;
1420 u32 timepassed_us;
1421 u64 bytes_perint;
1422 u8 itr_setting = ring_container->itr;
1423
1424 if (packets == 0)
1425 return;
1426
1427 /* simple throttle rate management
1428 * 0-20MB/s lowest (100000 ints/s)
1429 * 20-100MB/s low (20000 ints/s)
1430 * 100-1249MB/s bulk (12000 ints/s)
1431 */
1432 /* what was last interrupt timeslice? */
1433 timepassed_us = q_vector->itr >> 2;
1434 if (timepassed_us == 0)
1435 return;
1436
1437 bytes_perint = bytes / timepassed_us; /* bytes/usec */
1438
1439 switch (itr_setting) {
1440 case lowest_latency:
1441 if (bytes_perint > 10)
1442 itr_setting = low_latency;
1443 break;
1444 case low_latency:
1445 if (bytes_perint > 20)
1446 itr_setting = bulk_latency;
1447 else if (bytes_perint <= 10)
1448 itr_setting = lowest_latency;
1449 break;
1450 case bulk_latency:
1451 if (bytes_perint <= 20)
1452 itr_setting = low_latency;
1453 break;
1454 }
1455
1456 /* clear work counters since we have the values we need */
1457 ring_container->total_bytes = 0;
1458 ring_container->total_packets = 0;
1459
1460 /* write updated itr to ring container */
1461 ring_container->itr = itr_setting;
1462}
1463
1464static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector)
1465{
1466 u32 new_itr = q_vector->itr;
1467 u8 current_itr;
1468
1469 ixgbevf_update_itr(q_vector, &q_vector->tx);
1470 ixgbevf_update_itr(q_vector, &q_vector->rx);
1471
1472 current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
1473
1474 switch (current_itr) {
1475 /* counts and packets in update_itr are dependent on these numbers */
1476 case lowest_latency:
1477 new_itr = IXGBE_100K_ITR;
1478 break;
1479 case low_latency:
1480 new_itr = IXGBE_20K_ITR;
1481 break;
1482 case bulk_latency:
1483 new_itr = IXGBE_12K_ITR;
1484 break;
1485 default:
1486 break;
1487 }
1488
1489 if (new_itr != q_vector->itr) {
1490 /* do an exponential smoothing */
1491 new_itr = (10 * new_itr * q_vector->itr) /
1492 ((9 * new_itr) + q_vector->itr);
1493
1494 /* save the algorithm value here */
1495 q_vector->itr = new_itr;
1496
1497 ixgbevf_write_eitr(q_vector);
1498 }
1499}
1500
1501static irqreturn_t ixgbevf_msix_other(int irq, void *data)
1502{
1503 struct ixgbevf_adapter *adapter = data;
1504 struct ixgbe_hw *hw = &adapter->hw;
1505
1506 hw->mac.get_link_status = 1;
1507
1508 ixgbevf_service_event_schedule(adapter);
1509
1510 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_other);
1511
1512 return IRQ_HANDLED;
1513}
1514
1515/**
1516 * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues)
1517 * @irq: unused
1518 * @data: pointer to our q_vector struct for this interrupt vector
1519 **/
1520static irqreturn_t ixgbevf_msix_clean_rings(int irq, void *data)
1521{
1522 struct ixgbevf_q_vector *q_vector = data;
1523
1524 /* EIAM disabled interrupts (on this vector) for us */
1525 if (q_vector->rx.ring || q_vector->tx.ring)
1526 napi_schedule_irqoff(&q_vector->napi);
1527
1528 return IRQ_HANDLED;
1529}
1530
1531/**
1532 * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
1533 * @adapter: board private structure
1534 *
1535 * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
1536 * interrupts from the kernel.
1537 **/
1538static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)
1539{
1540 struct net_device *netdev = adapter->netdev;
1541 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1542 unsigned int ri = 0, ti = 0;
1543 int vector, err;
1544
1545 for (vector = 0; vector < q_vectors; vector++) {
1546 struct ixgbevf_q_vector *q_vector = adapter->q_vector[vector];
1547 struct msix_entry *entry = &adapter->msix_entries[vector];
1548
1549 if (q_vector->tx.ring && q_vector->rx.ring) {
1550 snprintf(q_vector->name, sizeof(q_vector->name),
1551 "%s-TxRx-%u", netdev->name, ri++);
1552 ti++;
1553 } else if (q_vector->rx.ring) {
1554 snprintf(q_vector->name, sizeof(q_vector->name),
1555 "%s-rx-%u", netdev->name, ri++);
1556 } else if (q_vector->tx.ring) {
1557 snprintf(q_vector->name, sizeof(q_vector->name),
1558 "%s-tx-%u", netdev->name, ti++);
1559 } else {
1560 /* skip this unused q_vector */
1561 continue;
1562 }
1563 err = request_irq(entry->vector, &ixgbevf_msix_clean_rings, 0,
1564 q_vector->name, q_vector);
1565 if (err) {
1566 hw_dbg(&adapter->hw,
1567 "request_irq failed for MSIX interrupt Error: %d\n",
1568 err);
1569 goto free_queue_irqs;
1570 }
1571 }
1572
1573 err = request_irq(adapter->msix_entries[vector].vector,
1574 &ixgbevf_msix_other, 0, netdev->name, adapter);
1575 if (err) {
1576 hw_dbg(&adapter->hw, "request_irq for msix_other failed: %d\n",
1577 err);
1578 goto free_queue_irqs;
1579 }
1580
1581 return 0;
1582
1583free_queue_irqs:
1584 while (vector) {
1585 vector--;
1586 free_irq(adapter->msix_entries[vector].vector,
1587 adapter->q_vector[vector]);
1588 }
1589 /* This failure is non-recoverable - it indicates the system is
1590 * out of MSIX vector resources and the VF driver cannot run
1591 * without them. Set the number of msix vectors to zero
1592 * indicating that not enough can be allocated. The error
1593 * will be returned to the user indicating device open failed.
1594 * Any further attempts to force the driver to open will also
1595 * fail. The only way to recover is to unload the driver and
1596 * reload it again. If the system has recovered some MSIX
1597 * vectors then it may succeed.
1598 */
1599 adapter->num_msix_vectors = 0;
1600 return err;
1601}
1602
1603/**
1604 * ixgbevf_request_irq - initialize interrupts
1605 * @adapter: board private structure
1606 *
1607 * Attempts to configure interrupts using the best available
1608 * capabilities of the hardware and kernel.
1609 **/
1610static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter)
1611{
1612 int err = ixgbevf_request_msix_irqs(adapter);
1613
1614 if (err)
1615 hw_dbg(&adapter->hw, "request_irq failed, Error %d\n", err);
1616
1617 return err;
1618}
1619
1620static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)
1621{
1622 int i, q_vectors;
1623
1624 if (!adapter->msix_entries)
1625 return;
1626
1627 q_vectors = adapter->num_msix_vectors;
1628 i = q_vectors - 1;
1629
1630 free_irq(adapter->msix_entries[i].vector, adapter);
1631 i--;
1632
1633 for (; i >= 0; i--) {
1634 /* free only the irqs that were actually requested */
1635 if (!adapter->q_vector[i]->rx.ring &&
1636 !adapter->q_vector[i]->tx.ring)
1637 continue;
1638
1639 free_irq(adapter->msix_entries[i].vector,
1640 adapter->q_vector[i]);
1641 }
1642}
1643
1644/**
1645 * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
1646 * @adapter: board private structure
1647 **/
1648static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter)
1649{
1650 struct ixgbe_hw *hw = &adapter->hw;
1651 int i;
1652
1653 IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, 0);
1654 IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0);
1655 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, 0);
1656
1657 IXGBE_WRITE_FLUSH(hw);
1658
1659 for (i = 0; i < adapter->num_msix_vectors; i++)
1660 synchronize_irq(adapter->msix_entries[i].vector);
1661}
1662
1663/**
1664 * ixgbevf_irq_enable - Enable default interrupt generation settings
1665 * @adapter: board private structure
1666 **/
1667static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter)
1668{
1669 struct ixgbe_hw *hw = &adapter->hw;
1670
1671 IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, adapter->eims_enable_mask);
1672 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, adapter->eims_enable_mask);
1673 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_enable_mask);
1674}
1675
1676/**
1677 * ixgbevf_configure_tx_ring - Configure 82599 VF Tx ring after Reset
1678 * @adapter: board private structure
1679 * @ring: structure containing ring specific data
1680 *
1681 * Configure the Tx descriptor ring after a reset.
1682 **/
1683static void ixgbevf_configure_tx_ring(struct ixgbevf_adapter *adapter,
1684 struct ixgbevf_ring *ring)
1685{
1686 struct ixgbe_hw *hw = &adapter->hw;
1687 u64 tdba = ring->dma;
1688 int wait_loop = 10;
1689 u32 txdctl = IXGBE_TXDCTL_ENABLE;
1690 u8 reg_idx = ring->reg_idx;
1691
1692 /* disable queue to avoid issues while updating state */
1693 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
1694 IXGBE_WRITE_FLUSH(hw);
1695
1696 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(reg_idx), tdba & DMA_BIT_MASK(32));
1697 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(reg_idx), tdba >> 32);
1698 IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(reg_idx),
1699 ring->count * sizeof(union ixgbe_adv_tx_desc));
1700
1701 /* disable head writeback */
1702 IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAH(reg_idx), 0);
1703 IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAL(reg_idx), 0);
1704
1705 /* enable relaxed ordering */
1706 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(reg_idx),
1707 (IXGBE_DCA_TXCTRL_DESC_RRO_EN |
1708 IXGBE_DCA_TXCTRL_DATA_RRO_EN));
1709
1710 /* reset head and tail pointers */
1711 IXGBE_WRITE_REG(hw, IXGBE_VFTDH(reg_idx), 0);
1712 IXGBE_WRITE_REG(hw, IXGBE_VFTDT(reg_idx), 0);
1713 ring->tail = adapter->io_addr + IXGBE_VFTDT(reg_idx);
1714
1715 /* reset ntu and ntc to place SW in sync with hardwdare */
1716 ring->next_to_clean = 0;
1717 ring->next_to_use = 0;
1718
1719 /* In order to avoid issues WTHRESH + PTHRESH should always be equal
1720 * to or less than the number of on chip descriptors, which is
1721 * currently 40.
1722 */
1723 txdctl |= (8 << 16); /* WTHRESH = 8 */
1724
1725 /* Setting PTHRESH to 32 both improves performance */
1726 txdctl |= (1u << 8) | /* HTHRESH = 1 */
1727 32; /* PTHRESH = 32 */
1728
1729 /* reinitialize tx_buffer_info */
1730 memset(ring->tx_buffer_info, 0,
1731 sizeof(struct ixgbevf_tx_buffer) * ring->count);
1732
1733 clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &ring->state);
1734 clear_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state);
1735
1736 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), txdctl);
1737
1738 /* poll to verify queue is enabled */
1739 do {
1740 usleep_range(1000, 2000);
1741 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(reg_idx));
1742 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
1743 if (!wait_loop)
1744 hw_dbg(hw, "Could not enable Tx Queue %d\n", reg_idx);
1745}
1746
1747/**
1748 * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1749 * @adapter: board private structure
1750 *
1751 * Configure the Tx unit of the MAC after a reset.
1752 **/
1753static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter)
1754{
1755 u32 i;
1756
1757 /* Setup the HW Tx Head and Tail descriptor pointers */
1758 for (i = 0; i < adapter->num_tx_queues; i++)
1759 ixgbevf_configure_tx_ring(adapter, adapter->tx_ring[i]);
1760 for (i = 0; i < adapter->num_xdp_queues; i++)
1761 ixgbevf_configure_tx_ring(adapter, adapter->xdp_ring[i]);
1762}
1763
1764#define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1765
1766static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter,
1767 struct ixgbevf_ring *ring, int index)
1768{
1769 struct ixgbe_hw *hw = &adapter->hw;
1770 u32 srrctl;
1771
1772 srrctl = IXGBE_SRRCTL_DROP_EN;
1773
1774 srrctl |= IXGBEVF_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT;
1775 if (ring_uses_large_buffer(ring))
1776 srrctl |= IXGBEVF_RXBUFFER_3072 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1777 else
1778 srrctl |= IXGBEVF_RXBUFFER_2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1779 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1780
1781 IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl);
1782}
1783
1784static void ixgbevf_setup_psrtype(struct ixgbevf_adapter *adapter)
1785{
1786 struct ixgbe_hw *hw = &adapter->hw;
1787
1788 /* PSRTYPE must be initialized in 82599 */
1789 u32 psrtype = IXGBE_PSRTYPE_TCPHDR | IXGBE_PSRTYPE_UDPHDR |
1790 IXGBE_PSRTYPE_IPV4HDR | IXGBE_PSRTYPE_IPV6HDR |
1791 IXGBE_PSRTYPE_L2HDR;
1792
1793 if (adapter->num_rx_queues > 1)
1794 psrtype |= BIT(29);
1795
1796 IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype);
1797}
1798
1799#define IXGBEVF_MAX_RX_DESC_POLL 10
1800static void ixgbevf_disable_rx_queue(struct ixgbevf_adapter *adapter,
1801 struct ixgbevf_ring *ring)
1802{
1803 struct ixgbe_hw *hw = &adapter->hw;
1804 int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1805 u32 rxdctl;
1806 u8 reg_idx = ring->reg_idx;
1807
1808 if (IXGBE_REMOVED(hw->hw_addr))
1809 return;
1810 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1811 rxdctl &= ~IXGBE_RXDCTL_ENABLE;
1812
1813 /* write value back with RXDCTL.ENABLE bit cleared */
1814 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1815
1816 /* the hardware may take up to 100us to really disable the Rx queue */
1817 do {
1818 udelay(10);
1819 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1820 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
1821
1822 if (!wait_loop)
1823 pr_err("RXDCTL.ENABLE queue %d not cleared while polling\n",
1824 reg_idx);
1825}
1826
1827static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter,
1828 struct ixgbevf_ring *ring)
1829{
1830 struct ixgbe_hw *hw = &adapter->hw;
1831 int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1832 u32 rxdctl;
1833 u8 reg_idx = ring->reg_idx;
1834
1835 if (IXGBE_REMOVED(hw->hw_addr))
1836 return;
1837 do {
1838 usleep_range(1000, 2000);
1839 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1840 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
1841
1842 if (!wait_loop)
1843 pr_err("RXDCTL.ENABLE queue %d not set while polling\n",
1844 reg_idx);
1845}
1846
1847/**
1848 * ixgbevf_init_rss_key - Initialize adapter RSS key
1849 * @adapter: device handle
1850 *
1851 * Allocates and initializes the RSS key if it is not allocated.
1852 **/
1853static inline int ixgbevf_init_rss_key(struct ixgbevf_adapter *adapter)
1854{
1855 u32 *rss_key;
1856
1857 if (!adapter->rss_key) {
1858 rss_key = kzalloc(IXGBEVF_RSS_HASH_KEY_SIZE, GFP_KERNEL);
1859 if (unlikely(!rss_key))
1860 return -ENOMEM;
1861
1862 netdev_rss_key_fill(rss_key, IXGBEVF_RSS_HASH_KEY_SIZE);
1863 adapter->rss_key = rss_key;
1864 }
1865
1866 return 0;
1867}
1868
1869static void ixgbevf_setup_vfmrqc(struct ixgbevf_adapter *adapter)
1870{
1871 struct ixgbe_hw *hw = &adapter->hw;
1872 u32 vfmrqc = 0, vfreta = 0;
1873 u16 rss_i = adapter->num_rx_queues;
1874 u8 i, j;
1875
1876 /* Fill out hash function seeds */
1877 for (i = 0; i < IXGBEVF_VFRSSRK_REGS; i++)
1878 IXGBE_WRITE_REG(hw, IXGBE_VFRSSRK(i), *(adapter->rss_key + i));
1879
1880 for (i = 0, j = 0; i < IXGBEVF_X550_VFRETA_SIZE; i++, j++) {
1881 if (j == rss_i)
1882 j = 0;
1883
1884 adapter->rss_indir_tbl[i] = j;
1885
1886 vfreta |= j << (i & 0x3) * 8;
1887 if ((i & 3) == 3) {
1888 IXGBE_WRITE_REG(hw, IXGBE_VFRETA(i >> 2), vfreta);
1889 vfreta = 0;
1890 }
1891 }
1892
1893 /* Perform hash on these packet types */
1894 vfmrqc |= IXGBE_VFMRQC_RSS_FIELD_IPV4 |
1895 IXGBE_VFMRQC_RSS_FIELD_IPV4_TCP |
1896 IXGBE_VFMRQC_RSS_FIELD_IPV6 |
1897 IXGBE_VFMRQC_RSS_FIELD_IPV6_TCP;
1898
1899 vfmrqc |= IXGBE_VFMRQC_RSSEN;
1900
1901 IXGBE_WRITE_REG(hw, IXGBE_VFMRQC, vfmrqc);
1902}
1903
1904static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter *adapter,
1905 struct ixgbevf_ring *ring)
1906{
1907 struct ixgbe_hw *hw = &adapter->hw;
1908 union ixgbe_adv_rx_desc *rx_desc;
1909 u64 rdba = ring->dma;
1910 u32 rxdctl;
1911 u8 reg_idx = ring->reg_idx;
1912
1913 /* disable queue to avoid issues while updating state */
1914 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1915 ixgbevf_disable_rx_queue(adapter, ring);
1916
1917 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(reg_idx), rdba & DMA_BIT_MASK(32));
1918 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(reg_idx), rdba >> 32);
1919 IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(reg_idx),
1920 ring->count * sizeof(union ixgbe_adv_rx_desc));
1921
1922#ifndef CONFIG_SPARC
1923 /* enable relaxed ordering */
1924 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),
1925 IXGBE_DCA_RXCTRL_DESC_RRO_EN);
1926#else
1927 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),
1928 IXGBE_DCA_RXCTRL_DESC_RRO_EN |
1929 IXGBE_DCA_RXCTRL_DATA_WRO_EN);
1930#endif
1931
1932 /* reset head and tail pointers */
1933 IXGBE_WRITE_REG(hw, IXGBE_VFRDH(reg_idx), 0);
1934 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(reg_idx), 0);
1935 ring->tail = adapter->io_addr + IXGBE_VFRDT(reg_idx);
1936
1937 /* initialize rx_buffer_info */
1938 memset(ring->rx_buffer_info, 0,
1939 sizeof(struct ixgbevf_rx_buffer) * ring->count);
1940
1941 /* initialize Rx descriptor 0 */
1942 rx_desc = IXGBEVF_RX_DESC(ring, 0);
1943 rx_desc->wb.upper.length = 0;
1944
1945 /* reset ntu and ntc to place SW in sync with hardwdare */
1946 ring->next_to_clean = 0;
1947 ring->next_to_use = 0;
1948 ring->next_to_alloc = 0;
1949
1950 ixgbevf_configure_srrctl(adapter, ring, reg_idx);
1951
1952 /* RXDCTL.RLPML does not work on 82599 */
1953 if (adapter->hw.mac.type != ixgbe_mac_82599_vf) {
1954 rxdctl &= ~(IXGBE_RXDCTL_RLPMLMASK |
1955 IXGBE_RXDCTL_RLPML_EN);
1956
1957#if (PAGE_SIZE < 8192)
1958 /* Limit the maximum frame size so we don't overrun the skb */
1959 if (ring_uses_build_skb(ring) &&
1960 !ring_uses_large_buffer(ring))
1961 rxdctl |= IXGBEVF_MAX_FRAME_BUILD_SKB |
1962 IXGBE_RXDCTL_RLPML_EN;
1963#endif
1964 }
1965
1966 rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME;
1967 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1968
1969 ixgbevf_rx_desc_queue_enable(adapter, ring);
1970 ixgbevf_alloc_rx_buffers(ring, ixgbevf_desc_unused(ring));
1971}
1972
1973static void ixgbevf_set_rx_buffer_len(struct ixgbevf_adapter *adapter,
1974 struct ixgbevf_ring *rx_ring)
1975{
1976 struct net_device *netdev = adapter->netdev;
1977 unsigned int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1978
1979 /* set build_skb and buffer size flags */
1980 clear_ring_build_skb_enabled(rx_ring);
1981 clear_ring_uses_large_buffer(rx_ring);
1982
1983 if (adapter->flags & IXGBEVF_FLAGS_LEGACY_RX)
1984 return;
1985
1986 if (PAGE_SIZE < 8192)
1987 if (max_frame > IXGBEVF_MAX_FRAME_BUILD_SKB)
1988 set_ring_uses_large_buffer(rx_ring);
1989
1990 /* 82599 can't rely on RXDCTL.RLPML to restrict the size of the frame */
1991 if (adapter->hw.mac.type == ixgbe_mac_82599_vf && !ring_uses_large_buffer(rx_ring))
1992 return;
1993
1994 set_ring_build_skb_enabled(rx_ring);
1995}
1996
1997/**
1998 * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
1999 * @adapter: board private structure
2000 *
2001 * Configure the Rx unit of the MAC after a reset.
2002 **/
2003static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)
2004{
2005 struct ixgbe_hw *hw = &adapter->hw;
2006 struct net_device *netdev = adapter->netdev;
2007 int i, ret;
2008
2009 ixgbevf_setup_psrtype(adapter);
2010 if (hw->mac.type >= ixgbe_mac_X550_vf)
2011 ixgbevf_setup_vfmrqc(adapter);
2012
2013 spin_lock_bh(&adapter->mbx_lock);
2014 /* notify the PF of our intent to use this size of frame */
2015 ret = hw->mac.ops.set_rlpml(hw, netdev->mtu + ETH_HLEN + ETH_FCS_LEN);
2016 spin_unlock_bh(&adapter->mbx_lock);
2017 if (ret)
2018 dev_err(&adapter->pdev->dev,
2019 "Failed to set MTU at %d\n", netdev->mtu);
2020
2021 /* Setup the HW Rx Head and Tail Descriptor Pointers and
2022 * the Base and Length of the Rx Descriptor Ring
2023 */
2024 for (i = 0; i < adapter->num_rx_queues; i++) {
2025 struct ixgbevf_ring *rx_ring = adapter->rx_ring[i];
2026
2027 ixgbevf_set_rx_buffer_len(adapter, rx_ring);
2028 ixgbevf_configure_rx_ring(adapter, rx_ring);
2029 }
2030}
2031
2032static int ixgbevf_vlan_rx_add_vid(struct net_device *netdev,
2033 __be16 proto, u16 vid)
2034{
2035 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2036 struct ixgbe_hw *hw = &adapter->hw;
2037 int err;
2038
2039 spin_lock_bh(&adapter->mbx_lock);
2040
2041 /* add VID to filter table */
2042 err = hw->mac.ops.set_vfta(hw, vid, 0, true);
2043
2044 spin_unlock_bh(&adapter->mbx_lock);
2045
2046 if (err) {
2047 netdev_err(netdev, "VF could not set VLAN %d\n", vid);
2048
2049 /* translate error return types so error makes sense */
2050 if (err == IXGBE_ERR_MBX)
2051 return -EIO;
2052
2053 if (err == IXGBE_ERR_INVALID_ARGUMENT)
2054 return -EACCES;
2055 }
2056
2057 set_bit(vid, adapter->active_vlans);
2058
2059 return err;
2060}
2061
2062static int ixgbevf_vlan_rx_kill_vid(struct net_device *netdev,
2063 __be16 proto, u16 vid)
2064{
2065 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2066 struct ixgbe_hw *hw = &adapter->hw;
2067 int err;
2068
2069 spin_lock_bh(&adapter->mbx_lock);
2070
2071 /* remove VID from filter table */
2072 err = hw->mac.ops.set_vfta(hw, vid, 0, false);
2073
2074 spin_unlock_bh(&adapter->mbx_lock);
2075
2076 if (err)
2077 netdev_err(netdev, "Could not remove VLAN %d\n", vid);
2078
2079 clear_bit(vid, adapter->active_vlans);
2080
2081 return err;
2082}
2083
2084static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter)
2085{
2086 u16 vid;
2087
2088 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
2089 ixgbevf_vlan_rx_add_vid(adapter->netdev,
2090 htons(ETH_P_8021Q), vid);
2091}
2092
2093static int ixgbevf_write_uc_addr_list(struct net_device *netdev)
2094{
2095 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2096 struct ixgbe_hw *hw = &adapter->hw;
2097 int count = 0;
2098
2099 if (!netdev_uc_empty(netdev)) {
2100 struct netdev_hw_addr *ha;
2101
2102 netdev_for_each_uc_addr(ha, netdev) {
2103 hw->mac.ops.set_uc_addr(hw, ++count, ha->addr);
2104 udelay(200);
2105 }
2106 } else {
2107 /* If the list is empty then send message to PF driver to
2108 * clear all MAC VLANs on this VF.
2109 */
2110 hw->mac.ops.set_uc_addr(hw, 0, NULL);
2111 }
2112
2113 return count;
2114}
2115
2116/**
2117 * ixgbevf_set_rx_mode - Multicast and unicast set
2118 * @netdev: network interface device structure
2119 *
2120 * The set_rx_method entry point is called whenever the multicast address
2121 * list, unicast address list or the network interface flags are updated.
2122 * This routine is responsible for configuring the hardware for proper
2123 * multicast mode and configuring requested unicast filters.
2124 **/
2125static void ixgbevf_set_rx_mode(struct net_device *netdev)
2126{
2127 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2128 struct ixgbe_hw *hw = &adapter->hw;
2129 unsigned int flags = netdev->flags;
2130 int xcast_mode;
2131
2132 /* request the most inclusive mode we need */
2133 if (flags & IFF_PROMISC)
2134 xcast_mode = IXGBEVF_XCAST_MODE_PROMISC;
2135 else if (flags & IFF_ALLMULTI)
2136 xcast_mode = IXGBEVF_XCAST_MODE_ALLMULTI;
2137 else if (flags & (IFF_BROADCAST | IFF_MULTICAST))
2138 xcast_mode = IXGBEVF_XCAST_MODE_MULTI;
2139 else
2140 xcast_mode = IXGBEVF_XCAST_MODE_NONE;
2141
2142 spin_lock_bh(&adapter->mbx_lock);
2143
2144 hw->mac.ops.update_xcast_mode(hw, xcast_mode);
2145
2146 /* reprogram multicast list */
2147 hw->mac.ops.update_mc_addr_list(hw, netdev);
2148
2149 ixgbevf_write_uc_addr_list(netdev);
2150
2151 spin_unlock_bh(&adapter->mbx_lock);
2152}
2153
2154static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter)
2155{
2156 int q_idx;
2157 struct ixgbevf_q_vector *q_vector;
2158 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2159
2160 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2161 q_vector = adapter->q_vector[q_idx];
2162 napi_enable(&q_vector->napi);
2163 }
2164}
2165
2166static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter)
2167{
2168 int q_idx;
2169 struct ixgbevf_q_vector *q_vector;
2170 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2171
2172 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2173 q_vector = adapter->q_vector[q_idx];
2174 napi_disable(&q_vector->napi);
2175 }
2176}
2177
2178static int ixgbevf_configure_dcb(struct ixgbevf_adapter *adapter)
2179{
2180 struct ixgbe_hw *hw = &adapter->hw;
2181 unsigned int def_q = 0;
2182 unsigned int num_tcs = 0;
2183 unsigned int num_rx_queues = adapter->num_rx_queues;
2184 unsigned int num_tx_queues = adapter->num_tx_queues;
2185 int err;
2186
2187 spin_lock_bh(&adapter->mbx_lock);
2188
2189 /* fetch queue configuration from the PF */
2190 err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
2191
2192 spin_unlock_bh(&adapter->mbx_lock);
2193
2194 if (err)
2195 return err;
2196
2197 if (num_tcs > 1) {
2198 /* we need only one Tx queue */
2199 num_tx_queues = 1;
2200
2201 /* update default Tx ring register index */
2202 adapter->tx_ring[0]->reg_idx = def_q;
2203
2204 /* we need as many queues as traffic classes */
2205 num_rx_queues = num_tcs;
2206 }
2207
2208 /* if we have a bad config abort request queue reset */
2209 if ((adapter->num_rx_queues != num_rx_queues) ||
2210 (adapter->num_tx_queues != num_tx_queues)) {
2211 /* force mailbox timeout to prevent further messages */
2212 hw->mbx.timeout = 0;
2213
2214 /* wait for watchdog to come around and bail us out */
2215 set_bit(__IXGBEVF_QUEUE_RESET_REQUESTED, &adapter->state);
2216 }
2217
2218 return 0;
2219}
2220
2221static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
2222{
2223 ixgbevf_configure_dcb(adapter);
2224
2225 ixgbevf_set_rx_mode(adapter->netdev);
2226
2227 ixgbevf_restore_vlan(adapter);
2228 ixgbevf_ipsec_restore(adapter);
2229
2230 ixgbevf_configure_tx(adapter);
2231 ixgbevf_configure_rx(adapter);
2232}
2233
2234static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter)
2235{
2236 /* Only save pre-reset stats if there are some */
2237 if (adapter->stats.vfgprc || adapter->stats.vfgptc) {
2238 adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc -
2239 adapter->stats.base_vfgprc;
2240 adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc -
2241 adapter->stats.base_vfgptc;
2242 adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc -
2243 adapter->stats.base_vfgorc;
2244 adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc -
2245 adapter->stats.base_vfgotc;
2246 adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc -
2247 adapter->stats.base_vfmprc;
2248 }
2249}
2250
2251static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
2252{
2253 struct ixgbe_hw *hw = &adapter->hw;
2254
2255 adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC);
2256 adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB);
2257 adapter->stats.last_vfgorc |=
2258 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32);
2259 adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC);
2260 adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB);
2261 adapter->stats.last_vfgotc |=
2262 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32);
2263 adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC);
2264
2265 adapter->stats.base_vfgprc = adapter->stats.last_vfgprc;
2266 adapter->stats.base_vfgorc = adapter->stats.last_vfgorc;
2267 adapter->stats.base_vfgptc = adapter->stats.last_vfgptc;
2268 adapter->stats.base_vfgotc = adapter->stats.last_vfgotc;
2269 adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;
2270}
2271
2272static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
2273{
2274 struct ixgbe_hw *hw = &adapter->hw;
2275 static const int api[] = {
2276 ixgbe_mbox_api_15,
2277 ixgbe_mbox_api_14,
2278 ixgbe_mbox_api_13,
2279 ixgbe_mbox_api_12,
2280 ixgbe_mbox_api_11,
2281 ixgbe_mbox_api_10,
2282 ixgbe_mbox_api_unknown
2283 };
2284 int err, idx = 0;
2285
2286 spin_lock_bh(&adapter->mbx_lock);
2287
2288 while (api[idx] != ixgbe_mbox_api_unknown) {
2289 err = hw->mac.ops.negotiate_api_version(hw, api[idx]);
2290 if (!err)
2291 break;
2292 idx++;
2293 }
2294
2295 if (hw->api_version >= ixgbe_mbox_api_15) {
2296 hw->mbx.ops.init_params(hw);
2297 memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
2298 sizeof(struct ixgbe_mbx_operations));
2299 }
2300
2301 spin_unlock_bh(&adapter->mbx_lock);
2302}
2303
2304static void ixgbevf_up_complete(struct ixgbevf_adapter *adapter)
2305{
2306 struct net_device *netdev = adapter->netdev;
2307 struct pci_dev *pdev = adapter->pdev;
2308 struct ixgbe_hw *hw = &adapter->hw;
2309 bool state;
2310
2311 ixgbevf_configure_msix(adapter);
2312
2313 spin_lock_bh(&adapter->mbx_lock);
2314
2315 if (is_valid_ether_addr(hw->mac.addr))
2316 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
2317 else
2318 hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0);
2319
2320 spin_unlock_bh(&adapter->mbx_lock);
2321
2322 state = adapter->link_state;
2323 hw->mac.ops.get_link_state(hw, &adapter->link_state);
2324 if (state && state != adapter->link_state)
2325 dev_info(&pdev->dev, "VF is administratively disabled\n");
2326
2327 smp_mb__before_atomic();
2328 clear_bit(__IXGBEVF_DOWN, &adapter->state);
2329 ixgbevf_napi_enable_all(adapter);
2330
2331 /* clear any pending interrupts, may auto mask */
2332 IXGBE_READ_REG(hw, IXGBE_VTEICR);
2333 ixgbevf_irq_enable(adapter);
2334
2335 /* enable transmits */
2336 netif_tx_start_all_queues(netdev);
2337
2338 ixgbevf_save_reset_stats(adapter);
2339 ixgbevf_init_last_counter_stats(adapter);
2340
2341 hw->mac.get_link_status = 1;
2342 mod_timer(&adapter->service_timer, jiffies);
2343}
2344
2345void ixgbevf_up(struct ixgbevf_adapter *adapter)
2346{
2347 ixgbevf_configure(adapter);
2348
2349 ixgbevf_up_complete(adapter);
2350}
2351
2352/**
2353 * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
2354 * @rx_ring: ring to free buffers from
2355 **/
2356static void ixgbevf_clean_rx_ring(struct ixgbevf_ring *rx_ring)
2357{
2358 u16 i = rx_ring->next_to_clean;
2359
2360 /* Free Rx ring sk_buff */
2361 if (rx_ring->skb) {
2362 dev_kfree_skb(rx_ring->skb);
2363 rx_ring->skb = NULL;
2364 }
2365
2366 /* Free all the Rx ring pages */
2367 while (i != rx_ring->next_to_alloc) {
2368 struct ixgbevf_rx_buffer *rx_buffer;
2369
2370 rx_buffer = &rx_ring->rx_buffer_info[i];
2371
2372 /* Invalidate cache lines that may have been written to by
2373 * device so that we avoid corrupting memory.
2374 */
2375 dma_sync_single_range_for_cpu(rx_ring->dev,
2376 rx_buffer->dma,
2377 rx_buffer->page_offset,
2378 ixgbevf_rx_bufsz(rx_ring),
2379 DMA_FROM_DEVICE);
2380
2381 /* free resources associated with mapping */
2382 dma_unmap_page_attrs(rx_ring->dev,
2383 rx_buffer->dma,
2384 ixgbevf_rx_pg_size(rx_ring),
2385 DMA_FROM_DEVICE,
2386 IXGBEVF_RX_DMA_ATTR);
2387
2388 __page_frag_cache_drain(rx_buffer->page,
2389 rx_buffer->pagecnt_bias);
2390
2391 i++;
2392 if (i == rx_ring->count)
2393 i = 0;
2394 }
2395
2396 rx_ring->next_to_alloc = 0;
2397 rx_ring->next_to_clean = 0;
2398 rx_ring->next_to_use = 0;
2399}
2400
2401/**
2402 * ixgbevf_clean_tx_ring - Free Tx Buffers
2403 * @tx_ring: ring to be cleaned
2404 **/
2405static void ixgbevf_clean_tx_ring(struct ixgbevf_ring *tx_ring)
2406{
2407 u16 i = tx_ring->next_to_clean;
2408 struct ixgbevf_tx_buffer *tx_buffer = &tx_ring->tx_buffer_info[i];
2409
2410 while (i != tx_ring->next_to_use) {
2411 union ixgbe_adv_tx_desc *eop_desc, *tx_desc;
2412
2413 /* Free all the Tx ring sk_buffs */
2414 if (ring_is_xdp(tx_ring))
2415 page_frag_free(tx_buffer->data);
2416 else
2417 dev_kfree_skb_any(tx_buffer->skb);
2418
2419 /* unmap skb header data */
2420 dma_unmap_single(tx_ring->dev,
2421 dma_unmap_addr(tx_buffer, dma),
2422 dma_unmap_len(tx_buffer, len),
2423 DMA_TO_DEVICE);
2424
2425 /* check for eop_desc to determine the end of the packet */
2426 eop_desc = tx_buffer->next_to_watch;
2427 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
2428
2429 /* unmap remaining buffers */
2430 while (tx_desc != eop_desc) {
2431 tx_buffer++;
2432 tx_desc++;
2433 i++;
2434 if (unlikely(i == tx_ring->count)) {
2435 i = 0;
2436 tx_buffer = tx_ring->tx_buffer_info;
2437 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
2438 }
2439
2440 /* unmap any remaining paged data */
2441 if (dma_unmap_len(tx_buffer, len))
2442 dma_unmap_page(tx_ring->dev,
2443 dma_unmap_addr(tx_buffer, dma),
2444 dma_unmap_len(tx_buffer, len),
2445 DMA_TO_DEVICE);
2446 }
2447
2448 /* move us one more past the eop_desc for start of next pkt */
2449 tx_buffer++;
2450 i++;
2451 if (unlikely(i == tx_ring->count)) {
2452 i = 0;
2453 tx_buffer = tx_ring->tx_buffer_info;
2454 }
2455 }
2456
2457 /* reset next_to_use and next_to_clean */
2458 tx_ring->next_to_use = 0;
2459 tx_ring->next_to_clean = 0;
2460
2461}
2462
2463/**
2464 * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
2465 * @adapter: board private structure
2466 **/
2467static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter)
2468{
2469 int i;
2470
2471 for (i = 0; i < adapter->num_rx_queues; i++)
2472 ixgbevf_clean_rx_ring(adapter->rx_ring[i]);
2473}
2474
2475/**
2476 * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
2477 * @adapter: board private structure
2478 **/
2479static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter)
2480{
2481 int i;
2482
2483 for (i = 0; i < adapter->num_tx_queues; i++)
2484 ixgbevf_clean_tx_ring(adapter->tx_ring[i]);
2485 for (i = 0; i < adapter->num_xdp_queues; i++)
2486 ixgbevf_clean_tx_ring(adapter->xdp_ring[i]);
2487}
2488
2489void ixgbevf_down(struct ixgbevf_adapter *adapter)
2490{
2491 struct net_device *netdev = adapter->netdev;
2492 struct ixgbe_hw *hw = &adapter->hw;
2493 int i;
2494
2495 /* signal that we are down to the interrupt handler */
2496 if (test_and_set_bit(__IXGBEVF_DOWN, &adapter->state))
2497 return; /* do nothing if already down */
2498
2499 /* disable all enabled Rx queues */
2500 for (i = 0; i < adapter->num_rx_queues; i++)
2501 ixgbevf_disable_rx_queue(adapter, adapter->rx_ring[i]);
2502
2503 usleep_range(10000, 20000);
2504
2505 netif_tx_stop_all_queues(netdev);
2506
2507 /* call carrier off first to avoid false dev_watchdog timeouts */
2508 netif_carrier_off(netdev);
2509 netif_tx_disable(netdev);
2510
2511 ixgbevf_irq_disable(adapter);
2512
2513 ixgbevf_napi_disable_all(adapter);
2514
2515 del_timer_sync(&adapter->service_timer);
2516
2517 /* disable transmits in the hardware now that interrupts are off */
2518 for (i = 0; i < adapter->num_tx_queues; i++) {
2519 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
2520
2521 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx),
2522 IXGBE_TXDCTL_SWFLSH);
2523 }
2524
2525 for (i = 0; i < adapter->num_xdp_queues; i++) {
2526 u8 reg_idx = adapter->xdp_ring[i]->reg_idx;
2527
2528 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx),
2529 IXGBE_TXDCTL_SWFLSH);
2530 }
2531
2532 if (!pci_channel_offline(adapter->pdev))
2533 ixgbevf_reset(adapter);
2534
2535 ixgbevf_clean_all_tx_rings(adapter);
2536 ixgbevf_clean_all_rx_rings(adapter);
2537}
2538
2539void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)
2540{
2541 while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
2542 msleep(1);
2543
2544 ixgbevf_down(adapter);
2545 pci_set_master(adapter->pdev);
2546 ixgbevf_up(adapter);
2547
2548 clear_bit(__IXGBEVF_RESETTING, &adapter->state);
2549}
2550
2551void ixgbevf_reset(struct ixgbevf_adapter *adapter)
2552{
2553 struct ixgbe_hw *hw = &adapter->hw;
2554 struct net_device *netdev = adapter->netdev;
2555
2556 if (hw->mac.ops.reset_hw(hw)) {
2557 hw_dbg(hw, "PF still resetting\n");
2558 } else {
2559 hw->mac.ops.init_hw(hw);
2560 ixgbevf_negotiate_api(adapter);
2561 }
2562
2563 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
2564 eth_hw_addr_set(netdev, adapter->hw.mac.addr);
2565 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2566 }
2567
2568 adapter->last_reset = jiffies;
2569}
2570
2571static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter,
2572 int vectors)
2573{
2574 int vector_threshold;
2575
2576 /* We'll want at least 2 (vector_threshold):
2577 * 1) TxQ[0] + RxQ[0] handler
2578 * 2) Other (Link Status Change, etc.)
2579 */
2580 vector_threshold = MIN_MSIX_COUNT;
2581
2582 /* The more we get, the more we will assign to Tx/Rx Cleanup
2583 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
2584 * Right now, we simply care about how many we'll get; we'll
2585 * set them up later while requesting irq's.
2586 */
2587 vectors = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
2588 vector_threshold, vectors);
2589
2590 if (vectors < 0) {
2591 dev_err(&adapter->pdev->dev,
2592 "Unable to allocate MSI-X interrupts\n");
2593 kfree(adapter->msix_entries);
2594 adapter->msix_entries = NULL;
2595 return vectors;
2596 }
2597
2598 /* Adjust for only the vectors we'll use, which is minimum
2599 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
2600 * vectors we were allocated.
2601 */
2602 adapter->num_msix_vectors = vectors;
2603
2604 return 0;
2605}
2606
2607/**
2608 * ixgbevf_set_num_queues - Allocate queues for device, feature dependent
2609 * @adapter: board private structure to initialize
2610 *
2611 * This is the top level queue allocation routine. The order here is very
2612 * important, starting with the "most" number of features turned on at once,
2613 * and ending with the smallest set of features. This way large combinations
2614 * can be allocated if they're turned on, and smaller combinations are the
2615 * fall through conditions.
2616 *
2617 **/
2618static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
2619{
2620 struct ixgbe_hw *hw = &adapter->hw;
2621 unsigned int def_q = 0;
2622 unsigned int num_tcs = 0;
2623 int err;
2624
2625 /* Start with base case */
2626 adapter->num_rx_queues = 1;
2627 adapter->num_tx_queues = 1;
2628 adapter->num_xdp_queues = 0;
2629
2630 spin_lock_bh(&adapter->mbx_lock);
2631
2632 /* fetch queue configuration from the PF */
2633 err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
2634
2635 spin_unlock_bh(&adapter->mbx_lock);
2636
2637 if (err)
2638 return;
2639
2640 /* we need as many queues as traffic classes */
2641 if (num_tcs > 1) {
2642 adapter->num_rx_queues = num_tcs;
2643 } else {
2644 u16 rss = min_t(u16, num_online_cpus(), IXGBEVF_MAX_RSS_QUEUES);
2645
2646 switch (hw->api_version) {
2647 case ixgbe_mbox_api_11:
2648 case ixgbe_mbox_api_12:
2649 case ixgbe_mbox_api_13:
2650 case ixgbe_mbox_api_14:
2651 case ixgbe_mbox_api_15:
2652 if (adapter->xdp_prog &&
2653 hw->mac.max_tx_queues == rss)
2654 rss = rss > 3 ? 2 : 1;
2655
2656 adapter->num_rx_queues = rss;
2657 adapter->num_tx_queues = rss;
2658 adapter->num_xdp_queues = adapter->xdp_prog ? rss : 0;
2659 break;
2660 default:
2661 break;
2662 }
2663 }
2664}
2665
2666/**
2667 * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
2668 * @adapter: board private structure to initialize
2669 *
2670 * Attempt to configure the interrupts using the best available
2671 * capabilities of the hardware and the kernel.
2672 **/
2673static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter)
2674{
2675 int vector, v_budget;
2676
2677 /* It's easy to be greedy for MSI-X vectors, but it really
2678 * doesn't do us much good if we have a lot more vectors
2679 * than CPU's. So let's be conservative and only ask for
2680 * (roughly) the same number of vectors as there are CPU's.
2681 * The default is to use pairs of vectors.
2682 */
2683 v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);
2684 v_budget = min_t(int, v_budget, num_online_cpus());
2685 v_budget += NON_Q_VECTORS;
2686
2687 adapter->msix_entries = kcalloc(v_budget,
2688 sizeof(struct msix_entry), GFP_KERNEL);
2689 if (!adapter->msix_entries)
2690 return -ENOMEM;
2691
2692 for (vector = 0; vector < v_budget; vector++)
2693 adapter->msix_entries[vector].entry = vector;
2694
2695 /* A failure in MSI-X entry allocation isn't fatal, but the VF driver
2696 * does not support any other modes, so we will simply fail here. Note
2697 * that we clean up the msix_entries pointer else-where.
2698 */
2699 return ixgbevf_acquire_msix_vectors(adapter, v_budget);
2700}
2701
2702static void ixgbevf_add_ring(struct ixgbevf_ring *ring,
2703 struct ixgbevf_ring_container *head)
2704{
2705 ring->next = head->ring;
2706 head->ring = ring;
2707 head->count++;
2708}
2709
2710/**
2711 * ixgbevf_alloc_q_vector - Allocate memory for a single interrupt vector
2712 * @adapter: board private structure to initialize
2713 * @v_idx: index of vector in adapter struct
2714 * @txr_count: number of Tx rings for q vector
2715 * @txr_idx: index of first Tx ring to assign
2716 * @xdp_count: total number of XDP rings to allocate
2717 * @xdp_idx: index of first XDP ring to allocate
2718 * @rxr_count: number of Rx rings for q vector
2719 * @rxr_idx: index of first Rx ring to assign
2720 *
2721 * We allocate one q_vector. If allocation fails we return -ENOMEM.
2722 **/
2723static int ixgbevf_alloc_q_vector(struct ixgbevf_adapter *adapter, int v_idx,
2724 int txr_count, int txr_idx,
2725 int xdp_count, int xdp_idx,
2726 int rxr_count, int rxr_idx)
2727{
2728 struct ixgbevf_q_vector *q_vector;
2729 int reg_idx = txr_idx + xdp_idx;
2730 struct ixgbevf_ring *ring;
2731 int ring_count, size;
2732
2733 ring_count = txr_count + xdp_count + rxr_count;
2734 size = sizeof(*q_vector) + (sizeof(*ring) * ring_count);
2735
2736 /* allocate q_vector and rings */
2737 q_vector = kzalloc(size, GFP_KERNEL);
2738 if (!q_vector)
2739 return -ENOMEM;
2740
2741 /* initialize NAPI */
2742 netif_napi_add(adapter->netdev, &q_vector->napi, ixgbevf_poll);
2743
2744 /* tie q_vector and adapter together */
2745 adapter->q_vector[v_idx] = q_vector;
2746 q_vector->adapter = adapter;
2747 q_vector->v_idx = v_idx;
2748
2749 /* initialize pointer to rings */
2750 ring = q_vector->ring;
2751
2752 while (txr_count) {
2753 /* assign generic ring traits */
2754 ring->dev = &adapter->pdev->dev;
2755 ring->netdev = adapter->netdev;
2756
2757 /* configure backlink on ring */
2758 ring->q_vector = q_vector;
2759
2760 /* update q_vector Tx values */
2761 ixgbevf_add_ring(ring, &q_vector->tx);
2762
2763 /* apply Tx specific ring traits */
2764 ring->count = adapter->tx_ring_count;
2765 ring->queue_index = txr_idx;
2766 ring->reg_idx = reg_idx;
2767
2768 /* assign ring to adapter */
2769 adapter->tx_ring[txr_idx] = ring;
2770
2771 /* update count and index */
2772 txr_count--;
2773 txr_idx++;
2774 reg_idx++;
2775
2776 /* push pointer to next ring */
2777 ring++;
2778 }
2779
2780 while (xdp_count) {
2781 /* assign generic ring traits */
2782 ring->dev = &adapter->pdev->dev;
2783 ring->netdev = adapter->netdev;
2784
2785 /* configure backlink on ring */
2786 ring->q_vector = q_vector;
2787
2788 /* update q_vector Tx values */
2789 ixgbevf_add_ring(ring, &q_vector->tx);
2790
2791 /* apply Tx specific ring traits */
2792 ring->count = adapter->tx_ring_count;
2793 ring->queue_index = xdp_idx;
2794 ring->reg_idx = reg_idx;
2795 set_ring_xdp(ring);
2796
2797 /* assign ring to adapter */
2798 adapter->xdp_ring[xdp_idx] = ring;
2799
2800 /* update count and index */
2801 xdp_count--;
2802 xdp_idx++;
2803 reg_idx++;
2804
2805 /* push pointer to next ring */
2806 ring++;
2807 }
2808
2809 while (rxr_count) {
2810 /* assign generic ring traits */
2811 ring->dev = &adapter->pdev->dev;
2812 ring->netdev = adapter->netdev;
2813
2814 /* configure backlink on ring */
2815 ring->q_vector = q_vector;
2816
2817 /* update q_vector Rx values */
2818 ixgbevf_add_ring(ring, &q_vector->rx);
2819
2820 /* apply Rx specific ring traits */
2821 ring->count = adapter->rx_ring_count;
2822 ring->queue_index = rxr_idx;
2823 ring->reg_idx = rxr_idx;
2824
2825 /* assign ring to adapter */
2826 adapter->rx_ring[rxr_idx] = ring;
2827
2828 /* update count and index */
2829 rxr_count--;
2830 rxr_idx++;
2831
2832 /* push pointer to next ring */
2833 ring++;
2834 }
2835
2836 return 0;
2837}
2838
2839/**
2840 * ixgbevf_free_q_vector - Free memory allocated for specific interrupt vector
2841 * @adapter: board private structure to initialize
2842 * @v_idx: index of vector in adapter struct
2843 *
2844 * This function frees the memory allocated to the q_vector. In addition if
2845 * NAPI is enabled it will delete any references to the NAPI struct prior
2846 * to freeing the q_vector.
2847 **/
2848static void ixgbevf_free_q_vector(struct ixgbevf_adapter *adapter, int v_idx)
2849{
2850 struct ixgbevf_q_vector *q_vector = adapter->q_vector[v_idx];
2851 struct ixgbevf_ring *ring;
2852
2853 ixgbevf_for_each_ring(ring, q_vector->tx) {
2854 if (ring_is_xdp(ring))
2855 adapter->xdp_ring[ring->queue_index] = NULL;
2856 else
2857 adapter->tx_ring[ring->queue_index] = NULL;
2858 }
2859
2860 ixgbevf_for_each_ring(ring, q_vector->rx)
2861 adapter->rx_ring[ring->queue_index] = NULL;
2862
2863 adapter->q_vector[v_idx] = NULL;
2864 netif_napi_del(&q_vector->napi);
2865
2866 /* ixgbevf_get_stats() might access the rings on this vector,
2867 * we must wait a grace period before freeing it.
2868 */
2869 kfree_rcu(q_vector, rcu);
2870}
2871
2872/**
2873 * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
2874 * @adapter: board private structure to initialize
2875 *
2876 * We allocate one q_vector per queue interrupt. If allocation fails we
2877 * return -ENOMEM.
2878 **/
2879static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)
2880{
2881 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2882 int rxr_remaining = adapter->num_rx_queues;
2883 int txr_remaining = adapter->num_tx_queues;
2884 int xdp_remaining = adapter->num_xdp_queues;
2885 int rxr_idx = 0, txr_idx = 0, xdp_idx = 0, v_idx = 0;
2886 int err;
2887
2888 if (q_vectors >= (rxr_remaining + txr_remaining + xdp_remaining)) {
2889 for (; rxr_remaining; v_idx++, q_vectors--) {
2890 int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors);
2891
2892 err = ixgbevf_alloc_q_vector(adapter, v_idx,
2893 0, 0, 0, 0, rqpv, rxr_idx);
2894 if (err)
2895 goto err_out;
2896
2897 /* update counts and index */
2898 rxr_remaining -= rqpv;
2899 rxr_idx += rqpv;
2900 }
2901 }
2902
2903 for (; q_vectors; v_idx++, q_vectors--) {
2904 int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors);
2905 int tqpv = DIV_ROUND_UP(txr_remaining, q_vectors);
2906 int xqpv = DIV_ROUND_UP(xdp_remaining, q_vectors);
2907
2908 err = ixgbevf_alloc_q_vector(adapter, v_idx,
2909 tqpv, txr_idx,
2910 xqpv, xdp_idx,
2911 rqpv, rxr_idx);
2912
2913 if (err)
2914 goto err_out;
2915
2916 /* update counts and index */
2917 rxr_remaining -= rqpv;
2918 rxr_idx += rqpv;
2919 txr_remaining -= tqpv;
2920 txr_idx += tqpv;
2921 xdp_remaining -= xqpv;
2922 xdp_idx += xqpv;
2923 }
2924
2925 return 0;
2926
2927err_out:
2928 while (v_idx) {
2929 v_idx--;
2930 ixgbevf_free_q_vector(adapter, v_idx);
2931 }
2932
2933 return -ENOMEM;
2934}
2935
2936/**
2937 * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
2938 * @adapter: board private structure to initialize
2939 *
2940 * This function frees the memory allocated to the q_vectors. In addition if
2941 * NAPI is enabled it will delete any references to the NAPI struct prior
2942 * to freeing the q_vector.
2943 **/
2944static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter)
2945{
2946 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2947
2948 while (q_vectors) {
2949 q_vectors--;
2950 ixgbevf_free_q_vector(adapter, q_vectors);
2951 }
2952}
2953
2954/**
2955 * ixgbevf_reset_interrupt_capability - Reset MSIX setup
2956 * @adapter: board private structure
2957 *
2958 **/
2959static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter)
2960{
2961 if (!adapter->msix_entries)
2962 return;
2963
2964 pci_disable_msix(adapter->pdev);
2965 kfree(adapter->msix_entries);
2966 adapter->msix_entries = NULL;
2967}
2968
2969/**
2970 * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
2971 * @adapter: board private structure to initialize
2972 *
2973 **/
2974static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter)
2975{
2976 int err;
2977
2978 /* Number of supported queues */
2979 ixgbevf_set_num_queues(adapter);
2980
2981 err = ixgbevf_set_interrupt_capability(adapter);
2982 if (err) {
2983 hw_dbg(&adapter->hw,
2984 "Unable to setup interrupt capabilities\n");
2985 goto err_set_interrupt;
2986 }
2987
2988 err = ixgbevf_alloc_q_vectors(adapter);
2989 if (err) {
2990 hw_dbg(&adapter->hw, "Unable to allocate memory for queue vectors\n");
2991 goto err_alloc_q_vectors;
2992 }
2993
2994 hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u XDP Queue count %u\n",
2995 (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled",
2996 adapter->num_rx_queues, adapter->num_tx_queues,
2997 adapter->num_xdp_queues);
2998
2999 set_bit(__IXGBEVF_DOWN, &adapter->state);
3000
3001 return 0;
3002err_alloc_q_vectors:
3003 ixgbevf_reset_interrupt_capability(adapter);
3004err_set_interrupt:
3005 return err;
3006}
3007
3008/**
3009 * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings
3010 * @adapter: board private structure to clear interrupt scheme on
3011 *
3012 * We go through and clear interrupt specific resources and reset the structure
3013 * to pre-load conditions
3014 **/
3015static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter)
3016{
3017 adapter->num_tx_queues = 0;
3018 adapter->num_xdp_queues = 0;
3019 adapter->num_rx_queues = 0;
3020
3021 ixgbevf_free_q_vectors(adapter);
3022 ixgbevf_reset_interrupt_capability(adapter);
3023}
3024
3025/**
3026 * ixgbevf_sw_init - Initialize general software structures
3027 * @adapter: board private structure to initialize
3028 *
3029 * ixgbevf_sw_init initializes the Adapter private data structure.
3030 * Fields are initialized based on PCI device information and
3031 * OS network device settings (MTU size).
3032 **/
3033static int ixgbevf_sw_init(struct ixgbevf_adapter *adapter)
3034{
3035 struct ixgbe_hw *hw = &adapter->hw;
3036 struct pci_dev *pdev = adapter->pdev;
3037 struct net_device *netdev = adapter->netdev;
3038 int err;
3039
3040 /* PCI config space info */
3041 hw->vendor_id = pdev->vendor;
3042 hw->device_id = pdev->device;
3043 hw->revision_id = pdev->revision;
3044 hw->subsystem_vendor_id = pdev->subsystem_vendor;
3045 hw->subsystem_device_id = pdev->subsystem_device;
3046
3047 hw->mbx.ops.init_params(hw);
3048
3049 if (hw->mac.type >= ixgbe_mac_X550_vf) {
3050 err = ixgbevf_init_rss_key(adapter);
3051 if (err)
3052 goto out;
3053 }
3054
3055 /* assume legacy case in which PF would only give VF 2 queues */
3056 hw->mac.max_tx_queues = 2;
3057 hw->mac.max_rx_queues = 2;
3058
3059 /* lock to protect mailbox accesses */
3060 spin_lock_init(&adapter->mbx_lock);
3061
3062 err = hw->mac.ops.reset_hw(hw);
3063 if (err) {
3064 dev_info(&pdev->dev,
3065 "PF still in reset state. Is the PF interface up?\n");
3066 } else {
3067 err = hw->mac.ops.init_hw(hw);
3068 if (err) {
3069 pr_err("init_shared_code failed: %d\n", err);
3070 goto out;
3071 }
3072 ixgbevf_negotiate_api(adapter);
3073 err = hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
3074 if (err)
3075 dev_info(&pdev->dev, "Error reading MAC address\n");
3076 else if (is_zero_ether_addr(adapter->hw.mac.addr))
3077 dev_info(&pdev->dev,
3078 "MAC address not assigned by administrator.\n");
3079 eth_hw_addr_set(netdev, hw->mac.addr);
3080 }
3081
3082 if (!is_valid_ether_addr(netdev->dev_addr)) {
3083 dev_info(&pdev->dev, "Assigning random MAC address\n");
3084 eth_hw_addr_random(netdev);
3085 ether_addr_copy(hw->mac.addr, netdev->dev_addr);
3086 ether_addr_copy(hw->mac.perm_addr, netdev->dev_addr);
3087 }
3088
3089 /* Enable dynamic interrupt throttling rates */
3090 adapter->rx_itr_setting = 1;
3091 adapter->tx_itr_setting = 1;
3092
3093 /* set default ring sizes */
3094 adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD;
3095 adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD;
3096
3097 adapter->link_state = true;
3098
3099 set_bit(__IXGBEVF_DOWN, &adapter->state);
3100 return 0;
3101
3102out:
3103 return err;
3104}
3105
3106#define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter) \
3107 { \
3108 u32 current_counter = IXGBE_READ_REG(hw, reg); \
3109 if (current_counter < last_counter) \
3110 counter += 0x100000000LL; \
3111 last_counter = current_counter; \
3112 counter &= 0xFFFFFFFF00000000LL; \
3113 counter |= current_counter; \
3114 }
3115
3116#define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
3117 { \
3118 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb); \
3119 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb); \
3120 u64 current_counter = (current_counter_msb << 32) | \
3121 current_counter_lsb; \
3122 if (current_counter < last_counter) \
3123 counter += 0x1000000000LL; \
3124 last_counter = current_counter; \
3125 counter &= 0xFFFFFFF000000000LL; \
3126 counter |= current_counter; \
3127 }
3128/**
3129 * ixgbevf_update_stats - Update the board statistics counters.
3130 * @adapter: board private structure
3131 **/
3132void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
3133{
3134 struct ixgbe_hw *hw = &adapter->hw;
3135 u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
3136 u64 alloc_rx_page = 0, hw_csum_rx_error = 0;
3137 int i;
3138
3139 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3140 test_bit(__IXGBEVF_RESETTING, &adapter->state))
3141 return;
3142
3143 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc,
3144 adapter->stats.vfgprc);
3145 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc,
3146 adapter->stats.vfgptc);
3147 UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB,
3148 adapter->stats.last_vfgorc,
3149 adapter->stats.vfgorc);
3150 UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB,
3151 adapter->stats.last_vfgotc,
3152 adapter->stats.vfgotc);
3153 UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
3154 adapter->stats.vfmprc);
3155
3156 for (i = 0; i < adapter->num_rx_queues; i++) {
3157 struct ixgbevf_ring *rx_ring = adapter->rx_ring[i];
3158
3159 hw_csum_rx_error += rx_ring->rx_stats.csum_err;
3160 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
3161 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
3162 alloc_rx_page += rx_ring->rx_stats.alloc_rx_page;
3163 }
3164
3165 adapter->hw_csum_rx_error = hw_csum_rx_error;
3166 adapter->alloc_rx_page_failed = alloc_rx_page_failed;
3167 adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
3168 adapter->alloc_rx_page = alloc_rx_page;
3169}
3170
3171/**
3172 * ixgbevf_service_timer - Timer Call-back
3173 * @t: pointer to timer_list struct
3174 **/
3175static void ixgbevf_service_timer(struct timer_list *t)
3176{
3177 struct ixgbevf_adapter *adapter = from_timer(adapter, t,
3178 service_timer);
3179
3180 /* Reset the timer */
3181 mod_timer(&adapter->service_timer, (HZ * 2) + jiffies);
3182
3183 ixgbevf_service_event_schedule(adapter);
3184}
3185
3186static void ixgbevf_reset_subtask(struct ixgbevf_adapter *adapter)
3187{
3188 if (!test_and_clear_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state))
3189 return;
3190
3191 rtnl_lock();
3192 /* If we're already down or resetting, just bail */
3193 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3194 test_bit(__IXGBEVF_REMOVING, &adapter->state) ||
3195 test_bit(__IXGBEVF_RESETTING, &adapter->state)) {
3196 rtnl_unlock();
3197 return;
3198 }
3199
3200 adapter->tx_timeout_count++;
3201
3202 ixgbevf_reinit_locked(adapter);
3203 rtnl_unlock();
3204}
3205
3206/**
3207 * ixgbevf_check_hang_subtask - check for hung queues and dropped interrupts
3208 * @adapter: pointer to the device adapter structure
3209 *
3210 * This function serves two purposes. First it strobes the interrupt lines
3211 * in order to make certain interrupts are occurring. Secondly it sets the
3212 * bits needed to check for TX hangs. As a result we should immediately
3213 * determine if a hang has occurred.
3214 **/
3215static void ixgbevf_check_hang_subtask(struct ixgbevf_adapter *adapter)
3216{
3217 struct ixgbe_hw *hw = &adapter->hw;
3218 u32 eics = 0;
3219 int i;
3220
3221 /* If we're down or resetting, just bail */
3222 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3223 test_bit(__IXGBEVF_RESETTING, &adapter->state))
3224 return;
3225
3226 /* Force detection of hung controller */
3227 if (netif_carrier_ok(adapter->netdev)) {
3228 for (i = 0; i < adapter->num_tx_queues; i++)
3229 set_check_for_tx_hang(adapter->tx_ring[i]);
3230 for (i = 0; i < adapter->num_xdp_queues; i++)
3231 set_check_for_tx_hang(adapter->xdp_ring[i]);
3232 }
3233
3234 /* get one bit for every active Tx/Rx interrupt vector */
3235 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
3236 struct ixgbevf_q_vector *qv = adapter->q_vector[i];
3237
3238 if (qv->rx.ring || qv->tx.ring)
3239 eics |= BIT(i);
3240 }
3241
3242 /* Cause software interrupt to ensure rings are cleaned */
3243 IXGBE_WRITE_REG(hw, IXGBE_VTEICS, eics);
3244}
3245
3246/**
3247 * ixgbevf_watchdog_update_link - update the link status
3248 * @adapter: pointer to the device adapter structure
3249 **/
3250static void ixgbevf_watchdog_update_link(struct ixgbevf_adapter *adapter)
3251{
3252 struct ixgbe_hw *hw = &adapter->hw;
3253 u32 link_speed = adapter->link_speed;
3254 bool link_up = adapter->link_up;
3255 s32 err;
3256
3257 spin_lock_bh(&adapter->mbx_lock);
3258
3259 err = hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
3260
3261 spin_unlock_bh(&adapter->mbx_lock);
3262
3263 /* if check for link returns error we will need to reset */
3264 if (err && time_after(jiffies, adapter->last_reset + (10 * HZ))) {
3265 set_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state);
3266 link_up = false;
3267 }
3268
3269 adapter->link_up = link_up;
3270 adapter->link_speed = link_speed;
3271}
3272
3273/**
3274 * ixgbevf_watchdog_link_is_up - update netif_carrier status and
3275 * print link up message
3276 * @adapter: pointer to the device adapter structure
3277 **/
3278static void ixgbevf_watchdog_link_is_up(struct ixgbevf_adapter *adapter)
3279{
3280 struct net_device *netdev = adapter->netdev;
3281
3282 /* only continue if link was previously down */
3283 if (netif_carrier_ok(netdev))
3284 return;
3285
3286 dev_info(&adapter->pdev->dev, "NIC Link is Up %s\n",
3287 (adapter->link_speed == IXGBE_LINK_SPEED_10GB_FULL) ?
3288 "10 Gbps" :
3289 (adapter->link_speed == IXGBE_LINK_SPEED_1GB_FULL) ?
3290 "1 Gbps" :
3291 (adapter->link_speed == IXGBE_LINK_SPEED_100_FULL) ?
3292 "100 Mbps" :
3293 "unknown speed");
3294
3295 netif_carrier_on(netdev);
3296}
3297
3298/**
3299 * ixgbevf_watchdog_link_is_down - update netif_carrier status and
3300 * print link down message
3301 * @adapter: pointer to the adapter structure
3302 **/
3303static void ixgbevf_watchdog_link_is_down(struct ixgbevf_adapter *adapter)
3304{
3305 struct net_device *netdev = adapter->netdev;
3306
3307 adapter->link_speed = 0;
3308
3309 /* only continue if link was up previously */
3310 if (!netif_carrier_ok(netdev))
3311 return;
3312
3313 dev_info(&adapter->pdev->dev, "NIC Link is Down\n");
3314
3315 netif_carrier_off(netdev);
3316}
3317
3318/**
3319 * ixgbevf_watchdog_subtask - worker thread to bring link up
3320 * @adapter: board private structure
3321 **/
3322static void ixgbevf_watchdog_subtask(struct ixgbevf_adapter *adapter)
3323{
3324 /* if interface is down do nothing */
3325 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3326 test_bit(__IXGBEVF_RESETTING, &adapter->state))
3327 return;
3328
3329 ixgbevf_watchdog_update_link(adapter);
3330
3331 if (adapter->link_up && adapter->link_state)
3332 ixgbevf_watchdog_link_is_up(adapter);
3333 else
3334 ixgbevf_watchdog_link_is_down(adapter);
3335
3336 ixgbevf_update_stats(adapter);
3337}
3338
3339/**
3340 * ixgbevf_service_task - manages and runs subtasks
3341 * @work: pointer to work_struct containing our data
3342 **/
3343static void ixgbevf_service_task(struct work_struct *work)
3344{
3345 struct ixgbevf_adapter *adapter = container_of(work,
3346 struct ixgbevf_adapter,
3347 service_task);
3348 struct ixgbe_hw *hw = &adapter->hw;
3349
3350 if (IXGBE_REMOVED(hw->hw_addr)) {
3351 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) {
3352 rtnl_lock();
3353 ixgbevf_down(adapter);
3354 rtnl_unlock();
3355 }
3356 return;
3357 }
3358
3359 ixgbevf_queue_reset_subtask(adapter);
3360 ixgbevf_reset_subtask(adapter);
3361 ixgbevf_watchdog_subtask(adapter);
3362 ixgbevf_check_hang_subtask(adapter);
3363
3364 ixgbevf_service_event_complete(adapter);
3365}
3366
3367/**
3368 * ixgbevf_free_tx_resources - Free Tx Resources per Queue
3369 * @tx_ring: Tx descriptor ring for a specific queue
3370 *
3371 * Free all transmit software resources
3372 **/
3373void ixgbevf_free_tx_resources(struct ixgbevf_ring *tx_ring)
3374{
3375 ixgbevf_clean_tx_ring(tx_ring);
3376
3377 vfree(tx_ring->tx_buffer_info);
3378 tx_ring->tx_buffer_info = NULL;
3379
3380 /* if not set, then don't free */
3381 if (!tx_ring->desc)
3382 return;
3383
3384 dma_free_coherent(tx_ring->dev, tx_ring->size, tx_ring->desc,
3385 tx_ring->dma);
3386
3387 tx_ring->desc = NULL;
3388}
3389
3390/**
3391 * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
3392 * @adapter: board private structure
3393 *
3394 * Free all transmit software resources
3395 **/
3396static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter)
3397{
3398 int i;
3399
3400 for (i = 0; i < adapter->num_tx_queues; i++)
3401 if (adapter->tx_ring[i]->desc)
3402 ixgbevf_free_tx_resources(adapter->tx_ring[i]);
3403 for (i = 0; i < adapter->num_xdp_queues; i++)
3404 if (adapter->xdp_ring[i]->desc)
3405 ixgbevf_free_tx_resources(adapter->xdp_ring[i]);
3406}
3407
3408/**
3409 * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
3410 * @tx_ring: Tx descriptor ring (for a specific queue) to setup
3411 *
3412 * Return 0 on success, negative on failure
3413 **/
3414int ixgbevf_setup_tx_resources(struct ixgbevf_ring *tx_ring)
3415{
3416 struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev);
3417 int size;
3418
3419 size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
3420 tx_ring->tx_buffer_info = vmalloc(size);
3421 if (!tx_ring->tx_buffer_info)
3422 goto err;
3423
3424 u64_stats_init(&tx_ring->syncp);
3425
3426 /* round up to nearest 4K */
3427 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
3428 tx_ring->size = ALIGN(tx_ring->size, 4096);
3429
3430 tx_ring->desc = dma_alloc_coherent(tx_ring->dev, tx_ring->size,
3431 &tx_ring->dma, GFP_KERNEL);
3432 if (!tx_ring->desc)
3433 goto err;
3434
3435 return 0;
3436
3437err:
3438 vfree(tx_ring->tx_buffer_info);
3439 tx_ring->tx_buffer_info = NULL;
3440 hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit descriptor ring\n");
3441 return -ENOMEM;
3442}
3443
3444/**
3445 * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
3446 * @adapter: board private structure
3447 *
3448 * If this function returns with an error, then it's possible one or
3449 * more of the rings is populated (while the rest are not). It is the
3450 * callers duty to clean those orphaned rings.
3451 *
3452 * Return 0 on success, negative on failure
3453 **/
3454static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)
3455{
3456 int i, j = 0, err = 0;
3457
3458 for (i = 0; i < adapter->num_tx_queues; i++) {
3459 err = ixgbevf_setup_tx_resources(adapter->tx_ring[i]);
3460 if (!err)
3461 continue;
3462 hw_dbg(&adapter->hw, "Allocation for Tx Queue %u failed\n", i);
3463 goto err_setup_tx;
3464 }
3465
3466 for (j = 0; j < adapter->num_xdp_queues; j++) {
3467 err = ixgbevf_setup_tx_resources(adapter->xdp_ring[j]);
3468 if (!err)
3469 continue;
3470 hw_dbg(&adapter->hw, "Allocation for XDP Queue %u failed\n", j);
3471 goto err_setup_tx;
3472 }
3473
3474 return 0;
3475err_setup_tx:
3476 /* rewind the index freeing the rings as we go */
3477 while (j--)
3478 ixgbevf_free_tx_resources(adapter->xdp_ring[j]);
3479 while (i--)
3480 ixgbevf_free_tx_resources(adapter->tx_ring[i]);
3481
3482 return err;
3483}
3484
3485/**
3486 * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
3487 * @adapter: board private structure
3488 * @rx_ring: Rx descriptor ring (for a specific queue) to setup
3489 *
3490 * Returns 0 on success, negative on failure
3491 **/
3492int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter,
3493 struct ixgbevf_ring *rx_ring)
3494{
3495 int size;
3496
3497 size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
3498 rx_ring->rx_buffer_info = vmalloc(size);
3499 if (!rx_ring->rx_buffer_info)
3500 goto err;
3501
3502 u64_stats_init(&rx_ring->syncp);
3503
3504 /* Round up to nearest 4K */
3505 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
3506 rx_ring->size = ALIGN(rx_ring->size, 4096);
3507
3508 rx_ring->desc = dma_alloc_coherent(rx_ring->dev, rx_ring->size,
3509 &rx_ring->dma, GFP_KERNEL);
3510
3511 if (!rx_ring->desc)
3512 goto err;
3513
3514 /* XDP RX-queue info */
3515 if (xdp_rxq_info_reg(&rx_ring->xdp_rxq, adapter->netdev,
3516 rx_ring->queue_index, 0) < 0)
3517 goto err;
3518
3519 rx_ring->xdp_prog = adapter->xdp_prog;
3520
3521 return 0;
3522err:
3523 vfree(rx_ring->rx_buffer_info);
3524 rx_ring->rx_buffer_info = NULL;
3525 dev_err(rx_ring->dev, "Unable to allocate memory for the Rx descriptor ring\n");
3526 return -ENOMEM;
3527}
3528
3529/**
3530 * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
3531 * @adapter: board private structure
3532 *
3533 * If this function returns with an error, then it's possible one or
3534 * more of the rings is populated (while the rest are not). It is the
3535 * callers duty to clean those orphaned rings.
3536 *
3537 * Return 0 on success, negative on failure
3538 **/
3539static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter)
3540{
3541 int i, err = 0;
3542
3543 for (i = 0; i < adapter->num_rx_queues; i++) {
3544 err = ixgbevf_setup_rx_resources(adapter, adapter->rx_ring[i]);
3545 if (!err)
3546 continue;
3547 hw_dbg(&adapter->hw, "Allocation for Rx Queue %u failed\n", i);
3548 goto err_setup_rx;
3549 }
3550
3551 return 0;
3552err_setup_rx:
3553 /* rewind the index freeing the rings as we go */
3554 while (i--)
3555 ixgbevf_free_rx_resources(adapter->rx_ring[i]);
3556 return err;
3557}
3558
3559/**
3560 * ixgbevf_free_rx_resources - Free Rx Resources
3561 * @rx_ring: ring to clean the resources from
3562 *
3563 * Free all receive software resources
3564 **/
3565void ixgbevf_free_rx_resources(struct ixgbevf_ring *rx_ring)
3566{
3567 ixgbevf_clean_rx_ring(rx_ring);
3568
3569 rx_ring->xdp_prog = NULL;
3570 xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
3571 vfree(rx_ring->rx_buffer_info);
3572 rx_ring->rx_buffer_info = NULL;
3573
3574 dma_free_coherent(rx_ring->dev, rx_ring->size, rx_ring->desc,
3575 rx_ring->dma);
3576
3577 rx_ring->desc = NULL;
3578}
3579
3580/**
3581 * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
3582 * @adapter: board private structure
3583 *
3584 * Free all receive software resources
3585 **/
3586static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter)
3587{
3588 int i;
3589
3590 for (i = 0; i < adapter->num_rx_queues; i++)
3591 if (adapter->rx_ring[i]->desc)
3592 ixgbevf_free_rx_resources(adapter->rx_ring[i]);
3593}
3594
3595/**
3596 * ixgbevf_open - Called when a network interface is made active
3597 * @netdev: network interface device structure
3598 *
3599 * Returns 0 on success, negative value on failure
3600 *
3601 * The open entry point is called when a network interface is made
3602 * active by the system (IFF_UP). At this point all resources needed
3603 * for transmit and receive operations are allocated, the interrupt
3604 * handler is registered with the OS, the watchdog timer is started,
3605 * and the stack is notified that the interface is ready.
3606 **/
3607int ixgbevf_open(struct net_device *netdev)
3608{
3609 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3610 struct ixgbe_hw *hw = &adapter->hw;
3611 int err;
3612
3613 /* A previous failure to open the device because of a lack of
3614 * available MSIX vector resources may have reset the number
3615 * of msix vectors variable to zero. The only way to recover
3616 * is to unload/reload the driver and hope that the system has
3617 * been able to recover some MSIX vector resources.
3618 */
3619 if (!adapter->num_msix_vectors)
3620 return -ENOMEM;
3621
3622 if (hw->adapter_stopped) {
3623 ixgbevf_reset(adapter);
3624 /* if adapter is still stopped then PF isn't up and
3625 * the VF can't start.
3626 */
3627 if (hw->adapter_stopped) {
3628 err = IXGBE_ERR_MBX;
3629 pr_err("Unable to start - perhaps the PF Driver isn't up yet\n");
3630 goto err_setup_reset;
3631 }
3632 }
3633
3634 /* disallow open during test */
3635 if (test_bit(__IXGBEVF_TESTING, &adapter->state))
3636 return -EBUSY;
3637
3638 netif_carrier_off(netdev);
3639
3640 /* allocate transmit descriptors */
3641 err = ixgbevf_setup_all_tx_resources(adapter);
3642 if (err)
3643 goto err_setup_tx;
3644
3645 /* allocate receive descriptors */
3646 err = ixgbevf_setup_all_rx_resources(adapter);
3647 if (err)
3648 goto err_setup_rx;
3649
3650 ixgbevf_configure(adapter);
3651
3652 err = ixgbevf_request_irq(adapter);
3653 if (err)
3654 goto err_req_irq;
3655
3656 /* Notify the stack of the actual queue counts. */
3657 err = netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues);
3658 if (err)
3659 goto err_set_queues;
3660
3661 err = netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues);
3662 if (err)
3663 goto err_set_queues;
3664
3665 ixgbevf_up_complete(adapter);
3666
3667 return 0;
3668
3669err_set_queues:
3670 ixgbevf_free_irq(adapter);
3671err_req_irq:
3672 ixgbevf_free_all_rx_resources(adapter);
3673err_setup_rx:
3674 ixgbevf_free_all_tx_resources(adapter);
3675err_setup_tx:
3676 ixgbevf_reset(adapter);
3677err_setup_reset:
3678
3679 return err;
3680}
3681
3682/**
3683 * ixgbevf_close_suspend - actions necessary to both suspend and close flows
3684 * @adapter: the private adapter struct
3685 *
3686 * This function should contain the necessary work common to both suspending
3687 * and closing of the device.
3688 */
3689static void ixgbevf_close_suspend(struct ixgbevf_adapter *adapter)
3690{
3691 ixgbevf_down(adapter);
3692 ixgbevf_free_irq(adapter);
3693 ixgbevf_free_all_tx_resources(adapter);
3694 ixgbevf_free_all_rx_resources(adapter);
3695}
3696
3697/**
3698 * ixgbevf_close - Disables a network interface
3699 * @netdev: network interface device structure
3700 *
3701 * Returns 0, this is not allowed to fail
3702 *
3703 * The close entry point is called when an interface is de-activated
3704 * by the OS. The hardware is still under the drivers control, but
3705 * needs to be disabled. A global MAC reset is issued to stop the
3706 * hardware, and all transmit and receive resources are freed.
3707 **/
3708int ixgbevf_close(struct net_device *netdev)
3709{
3710 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3711
3712 if (netif_device_present(netdev))
3713 ixgbevf_close_suspend(adapter);
3714
3715 return 0;
3716}
3717
3718static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter)
3719{
3720 struct net_device *dev = adapter->netdev;
3721
3722 if (!test_and_clear_bit(__IXGBEVF_QUEUE_RESET_REQUESTED,
3723 &adapter->state))
3724 return;
3725
3726 /* if interface is down do nothing */
3727 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3728 test_bit(__IXGBEVF_RESETTING, &adapter->state))
3729 return;
3730
3731 /* Hardware has to reinitialize queues and interrupts to
3732 * match packet buffer alignment. Unfortunately, the
3733 * hardware is not flexible enough to do this dynamically.
3734 */
3735 rtnl_lock();
3736
3737 if (netif_running(dev))
3738 ixgbevf_close(dev);
3739
3740 ixgbevf_clear_interrupt_scheme(adapter);
3741 ixgbevf_init_interrupt_scheme(adapter);
3742
3743 if (netif_running(dev))
3744 ixgbevf_open(dev);
3745
3746 rtnl_unlock();
3747}
3748
3749static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring *tx_ring,
3750 u32 vlan_macip_lens, u32 fceof_saidx,
3751 u32 type_tucmd, u32 mss_l4len_idx)
3752{
3753 struct ixgbe_adv_tx_context_desc *context_desc;
3754 u16 i = tx_ring->next_to_use;
3755
3756 context_desc = IXGBEVF_TX_CTXTDESC(tx_ring, i);
3757
3758 i++;
3759 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
3760
3761 /* set bits to identify this as an advanced context descriptor */
3762 type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT;
3763
3764 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
3765 context_desc->fceof_saidx = cpu_to_le32(fceof_saidx);
3766 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd);
3767 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
3768}
3769
3770static int ixgbevf_tso(struct ixgbevf_ring *tx_ring,
3771 struct ixgbevf_tx_buffer *first,
3772 u8 *hdr_len,
3773 struct ixgbevf_ipsec_tx_data *itd)
3774{
3775 u32 vlan_macip_lens, type_tucmd, mss_l4len_idx;
3776 struct sk_buff *skb = first->skb;
3777 union {
3778 struct iphdr *v4;
3779 struct ipv6hdr *v6;
3780 unsigned char *hdr;
3781 } ip;
3782 union {
3783 struct tcphdr *tcp;
3784 unsigned char *hdr;
3785 } l4;
3786 u32 paylen, l4_offset;
3787 u32 fceof_saidx = 0;
3788 int err;
3789
3790 if (skb->ip_summed != CHECKSUM_PARTIAL)
3791 return 0;
3792
3793 if (!skb_is_gso(skb))
3794 return 0;
3795
3796 err = skb_cow_head(skb, 0);
3797 if (err < 0)
3798 return err;
3799
3800 if (eth_p_mpls(first->protocol))
3801 ip.hdr = skb_inner_network_header(skb);
3802 else
3803 ip.hdr = skb_network_header(skb);
3804 l4.hdr = skb_checksum_start(skb);
3805
3806 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
3807 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
3808
3809 /* initialize outer IP header fields */
3810 if (ip.v4->version == 4) {
3811 unsigned char *csum_start = skb_checksum_start(skb);
3812 unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4);
3813 int len = csum_start - trans_start;
3814
3815 /* IP header will have to cancel out any data that
3816 * is not a part of the outer IP header, so set to
3817 * a reverse csum if needed, else init check to 0.
3818 */
3819 ip.v4->check = (skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) ?
3820 csum_fold(csum_partial(trans_start,
3821 len, 0)) : 0;
3822 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
3823
3824 ip.v4->tot_len = 0;
3825 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
3826 IXGBE_TX_FLAGS_CSUM |
3827 IXGBE_TX_FLAGS_IPV4;
3828 } else {
3829 ip.v6->payload_len = 0;
3830 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
3831 IXGBE_TX_FLAGS_CSUM;
3832 }
3833
3834 /* determine offset of inner transport header */
3835 l4_offset = l4.hdr - skb->data;
3836
3837 /* compute length of segmentation header */
3838 *hdr_len = (l4.tcp->doff * 4) + l4_offset;
3839
3840 /* remove payload length from inner checksum */
3841 paylen = skb->len - l4_offset;
3842 csum_replace_by_diff(&l4.tcp->check, (__force __wsum)htonl(paylen));
3843
3844 /* update gso size and bytecount with header size */
3845 first->gso_segs = skb_shinfo(skb)->gso_segs;
3846 first->bytecount += (first->gso_segs - 1) * *hdr_len;
3847
3848 /* mss_l4len_id: use 1 as index for TSO */
3849 mss_l4len_idx = (*hdr_len - l4_offset) << IXGBE_ADVTXD_L4LEN_SHIFT;
3850 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
3851 mss_l4len_idx |= (1u << IXGBE_ADVTXD_IDX_SHIFT);
3852
3853 fceof_saidx |= itd->pfsa;
3854 type_tucmd |= itd->flags | itd->trailer_len;
3855
3856 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
3857 vlan_macip_lens = l4.hdr - ip.hdr;
3858 vlan_macip_lens |= (ip.hdr - skb->data) << IXGBE_ADVTXD_MACLEN_SHIFT;
3859 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
3860
3861 ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens, fceof_saidx, type_tucmd,
3862 mss_l4len_idx);
3863
3864 return 1;
3865}
3866
3867static void ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring,
3868 struct ixgbevf_tx_buffer *first,
3869 struct ixgbevf_ipsec_tx_data *itd)
3870{
3871 struct sk_buff *skb = first->skb;
3872 u32 vlan_macip_lens = 0;
3873 u32 fceof_saidx = 0;
3874 u32 type_tucmd = 0;
3875
3876 if (skb->ip_summed != CHECKSUM_PARTIAL)
3877 goto no_csum;
3878
3879 switch (skb->csum_offset) {
3880 case offsetof(struct tcphdr, check):
3881 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
3882 fallthrough;
3883 case offsetof(struct udphdr, check):
3884 break;
3885 case offsetof(struct sctphdr, checksum):
3886 /* validate that this is actually an SCTP request */
3887 if (skb_csum_is_sctp(skb)) {
3888 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_SCTP;
3889 break;
3890 }
3891 fallthrough;
3892 default:
3893 skb_checksum_help(skb);
3894 goto no_csum;
3895 }
3896
3897 if (first->protocol == htons(ETH_P_IP))
3898 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
3899
3900 /* update TX checksum flag */
3901 first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
3902 vlan_macip_lens = skb_checksum_start_offset(skb) -
3903 skb_network_offset(skb);
3904no_csum:
3905 /* vlan_macip_lens: MACLEN, VLAN tag */
3906 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
3907 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
3908
3909 fceof_saidx |= itd->pfsa;
3910 type_tucmd |= itd->flags | itd->trailer_len;
3911
3912 ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
3913 fceof_saidx, type_tucmd, 0);
3914}
3915
3916static __le32 ixgbevf_tx_cmd_type(u32 tx_flags)
3917{
3918 /* set type for advanced descriptor with frame checksum insertion */
3919 __le32 cmd_type = cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA |
3920 IXGBE_ADVTXD_DCMD_IFCS |
3921 IXGBE_ADVTXD_DCMD_DEXT);
3922
3923 /* set HW VLAN bit if VLAN is present */
3924 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3925 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE);
3926
3927 /* set segmentation enable bits for TSO/FSO */
3928 if (tx_flags & IXGBE_TX_FLAGS_TSO)
3929 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE);
3930
3931 return cmd_type;
3932}
3933
3934static void ixgbevf_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
3935 u32 tx_flags, unsigned int paylen)
3936{
3937 __le32 olinfo_status = cpu_to_le32(paylen << IXGBE_ADVTXD_PAYLEN_SHIFT);
3938
3939 /* enable L4 checksum for TSO and TX checksum offload */
3940 if (tx_flags & IXGBE_TX_FLAGS_CSUM)
3941 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM);
3942
3943 /* enble IPv4 checksum for TSO */
3944 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
3945 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IXSM);
3946
3947 /* enable IPsec */
3948 if (tx_flags & IXGBE_TX_FLAGS_IPSEC)
3949 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IPSEC);
3950
3951 /* use index 1 context for TSO/FSO/FCOE/IPSEC */
3952 if (tx_flags & (IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_IPSEC))
3953 olinfo_status |= cpu_to_le32(1u << IXGBE_ADVTXD_IDX_SHIFT);
3954
3955 /* Check Context must be set if Tx switch is enabled, which it
3956 * always is for case where virtual functions are running
3957 */
3958 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_CC);
3959
3960 tx_desc->read.olinfo_status = olinfo_status;
3961}
3962
3963static void ixgbevf_tx_map(struct ixgbevf_ring *tx_ring,
3964 struct ixgbevf_tx_buffer *first,
3965 const u8 hdr_len)
3966{
3967 struct sk_buff *skb = first->skb;
3968 struct ixgbevf_tx_buffer *tx_buffer;
3969 union ixgbe_adv_tx_desc *tx_desc;
3970 skb_frag_t *frag;
3971 dma_addr_t dma;
3972 unsigned int data_len, size;
3973 u32 tx_flags = first->tx_flags;
3974 __le32 cmd_type = ixgbevf_tx_cmd_type(tx_flags);
3975 u16 i = tx_ring->next_to_use;
3976
3977 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
3978
3979 ixgbevf_tx_olinfo_status(tx_desc, tx_flags, skb->len - hdr_len);
3980
3981 size = skb_headlen(skb);
3982 data_len = skb->data_len;
3983
3984 dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);
3985
3986 tx_buffer = first;
3987
3988 for (frag = &skb_shinfo(skb)->frags[0];; frag++) {
3989 if (dma_mapping_error(tx_ring->dev, dma))
3990 goto dma_error;
3991
3992 /* record length, and DMA address */
3993 dma_unmap_len_set(tx_buffer, len, size);
3994 dma_unmap_addr_set(tx_buffer, dma, dma);
3995
3996 tx_desc->read.buffer_addr = cpu_to_le64(dma);
3997
3998 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {
3999 tx_desc->read.cmd_type_len =
4000 cmd_type | cpu_to_le32(IXGBE_MAX_DATA_PER_TXD);
4001
4002 i++;
4003 tx_desc++;
4004 if (i == tx_ring->count) {
4005 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
4006 i = 0;
4007 }
4008 tx_desc->read.olinfo_status = 0;
4009
4010 dma += IXGBE_MAX_DATA_PER_TXD;
4011 size -= IXGBE_MAX_DATA_PER_TXD;
4012
4013 tx_desc->read.buffer_addr = cpu_to_le64(dma);
4014 }
4015
4016 if (likely(!data_len))
4017 break;
4018
4019 tx_desc->read.cmd_type_len = cmd_type | cpu_to_le32(size);
4020
4021 i++;
4022 tx_desc++;
4023 if (i == tx_ring->count) {
4024 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
4025 i = 0;
4026 }
4027 tx_desc->read.olinfo_status = 0;
4028
4029 size = skb_frag_size(frag);
4030 data_len -= size;
4031
4032 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,
4033 DMA_TO_DEVICE);
4034
4035 tx_buffer = &tx_ring->tx_buffer_info[i];
4036 }
4037
4038 /* write last descriptor with RS and EOP bits */
4039 cmd_type |= cpu_to_le32(size) | cpu_to_le32(IXGBE_TXD_CMD);
4040 tx_desc->read.cmd_type_len = cmd_type;
4041
4042 /* set the timestamp */
4043 first->time_stamp = jiffies;
4044
4045 skb_tx_timestamp(skb);
4046
4047 /* Force memory writes to complete before letting h/w know there
4048 * are new descriptors to fetch. (Only applicable for weak-ordered
4049 * memory model archs, such as IA-64).
4050 *
4051 * We also need this memory barrier (wmb) to make certain all of the
4052 * status bits have been updated before next_to_watch is written.
4053 */
4054 wmb();
4055
4056 /* set next_to_watch value indicating a packet is present */
4057 first->next_to_watch = tx_desc;
4058
4059 i++;
4060 if (i == tx_ring->count)
4061 i = 0;
4062
4063 tx_ring->next_to_use = i;
4064
4065 /* notify HW of packet */
4066 ixgbevf_write_tail(tx_ring, i);
4067
4068 return;
4069dma_error:
4070 dev_err(tx_ring->dev, "TX DMA map failed\n");
4071 tx_buffer = &tx_ring->tx_buffer_info[i];
4072
4073 /* clear dma mappings for failed tx_buffer_info map */
4074 while (tx_buffer != first) {
4075 if (dma_unmap_len(tx_buffer, len))
4076 dma_unmap_page(tx_ring->dev,
4077 dma_unmap_addr(tx_buffer, dma),
4078 dma_unmap_len(tx_buffer, len),
4079 DMA_TO_DEVICE);
4080 dma_unmap_len_set(tx_buffer, len, 0);
4081
4082 if (i-- == 0)
4083 i += tx_ring->count;
4084 tx_buffer = &tx_ring->tx_buffer_info[i];
4085 }
4086
4087 if (dma_unmap_len(tx_buffer, len))
4088 dma_unmap_single(tx_ring->dev,
4089 dma_unmap_addr(tx_buffer, dma),
4090 dma_unmap_len(tx_buffer, len),
4091 DMA_TO_DEVICE);
4092 dma_unmap_len_set(tx_buffer, len, 0);
4093
4094 dev_kfree_skb_any(tx_buffer->skb);
4095 tx_buffer->skb = NULL;
4096
4097 tx_ring->next_to_use = i;
4098}
4099
4100static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
4101{
4102 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
4103 /* Herbert's original patch had:
4104 * smp_mb__after_netif_stop_queue();
4105 * but since that doesn't exist yet, just open code it.
4106 */
4107 smp_mb();
4108
4109 /* We need to check again in a case another CPU has just
4110 * made room available.
4111 */
4112 if (likely(ixgbevf_desc_unused(tx_ring) < size))
4113 return -EBUSY;
4114
4115 /* A reprieve! - use start_queue because it doesn't call schedule */
4116 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
4117 ++tx_ring->tx_stats.restart_queue;
4118
4119 return 0;
4120}
4121
4122static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
4123{
4124 if (likely(ixgbevf_desc_unused(tx_ring) >= size))
4125 return 0;
4126 return __ixgbevf_maybe_stop_tx(tx_ring, size);
4127}
4128
4129static int ixgbevf_xmit_frame_ring(struct sk_buff *skb,
4130 struct ixgbevf_ring *tx_ring)
4131{
4132 struct ixgbevf_tx_buffer *first;
4133 int tso;
4134 u32 tx_flags = 0;
4135 u16 count = TXD_USE_COUNT(skb_headlen(skb));
4136 struct ixgbevf_ipsec_tx_data ipsec_tx = { 0 };
4137#if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
4138 unsigned short f;
4139#endif
4140 u8 hdr_len = 0;
4141 u8 *dst_mac = skb_header_pointer(skb, 0, 0, NULL);
4142
4143 if (!dst_mac || is_link_local_ether_addr(dst_mac)) {
4144 dev_kfree_skb_any(skb);
4145 return NETDEV_TX_OK;
4146 }
4147
4148 /* need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
4149 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
4150 * + 2 desc gap to keep tail from touching head,
4151 * + 1 desc for context descriptor,
4152 * otherwise try next time
4153 */
4154#if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
4155 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
4156 skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
4157
4158 count += TXD_USE_COUNT(skb_frag_size(frag));
4159 }
4160#else
4161 count += skb_shinfo(skb)->nr_frags;
4162#endif
4163 if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) {
4164 tx_ring->tx_stats.tx_busy++;
4165 return NETDEV_TX_BUSY;
4166 }
4167
4168 /* record the location of the first descriptor for this packet */
4169 first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
4170 first->skb = skb;
4171 first->bytecount = skb->len;
4172 first->gso_segs = 1;
4173
4174 if (skb_vlan_tag_present(skb)) {
4175 tx_flags |= skb_vlan_tag_get(skb);
4176 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
4177 tx_flags |= IXGBE_TX_FLAGS_VLAN;
4178 }
4179
4180 /* record initial flags and protocol */
4181 first->tx_flags = tx_flags;
4182 first->protocol = vlan_get_protocol(skb);
4183
4184#ifdef CONFIG_IXGBEVF_IPSEC
4185 if (xfrm_offload(skb) && !ixgbevf_ipsec_tx(tx_ring, first, &ipsec_tx))
4186 goto out_drop;
4187#endif
4188 tso = ixgbevf_tso(tx_ring, first, &hdr_len, &ipsec_tx);
4189 if (tso < 0)
4190 goto out_drop;
4191 else if (!tso)
4192 ixgbevf_tx_csum(tx_ring, first, &ipsec_tx);
4193
4194 ixgbevf_tx_map(tx_ring, first, hdr_len);
4195
4196 ixgbevf_maybe_stop_tx(tx_ring, DESC_NEEDED);
4197
4198 return NETDEV_TX_OK;
4199
4200out_drop:
4201 dev_kfree_skb_any(first->skb);
4202 first->skb = NULL;
4203
4204 return NETDEV_TX_OK;
4205}
4206
4207static netdev_tx_t ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
4208{
4209 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4210 struct ixgbevf_ring *tx_ring;
4211
4212 if (skb->len <= 0) {
4213 dev_kfree_skb_any(skb);
4214 return NETDEV_TX_OK;
4215 }
4216
4217 /* The minimum packet size for olinfo paylen is 17 so pad the skb
4218 * in order to meet this minimum size requirement.
4219 */
4220 if (skb->len < 17) {
4221 if (skb_padto(skb, 17))
4222 return NETDEV_TX_OK;
4223 skb->len = 17;
4224 }
4225
4226 tx_ring = adapter->tx_ring[skb->queue_mapping];
4227 return ixgbevf_xmit_frame_ring(skb, tx_ring);
4228}
4229
4230/**
4231 * ixgbevf_set_mac - Change the Ethernet Address of the NIC
4232 * @netdev: network interface device structure
4233 * @p: pointer to an address structure
4234 *
4235 * Returns 0 on success, negative on failure
4236 **/
4237static int ixgbevf_set_mac(struct net_device *netdev, void *p)
4238{
4239 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4240 struct ixgbe_hw *hw = &adapter->hw;
4241 struct sockaddr *addr = p;
4242 int err;
4243
4244 if (!is_valid_ether_addr(addr->sa_data))
4245 return -EADDRNOTAVAIL;
4246
4247 spin_lock_bh(&adapter->mbx_lock);
4248
4249 err = hw->mac.ops.set_rar(hw, 0, addr->sa_data, 0);
4250
4251 spin_unlock_bh(&adapter->mbx_lock);
4252
4253 if (err)
4254 return -EPERM;
4255
4256 ether_addr_copy(hw->mac.addr, addr->sa_data);
4257 ether_addr_copy(hw->mac.perm_addr, addr->sa_data);
4258 eth_hw_addr_set(netdev, addr->sa_data);
4259
4260 return 0;
4261}
4262
4263/**
4264 * ixgbevf_change_mtu - Change the Maximum Transfer Unit
4265 * @netdev: network interface device structure
4266 * @new_mtu: new value for maximum frame size
4267 *
4268 * Returns 0 on success, negative on failure
4269 **/
4270static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
4271{
4272 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4273 struct ixgbe_hw *hw = &adapter->hw;
4274 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4275 int ret;
4276
4277 /* prevent MTU being changed to a size unsupported by XDP */
4278 if (adapter->xdp_prog) {
4279 dev_warn(&adapter->pdev->dev, "MTU cannot be changed while XDP program is loaded\n");
4280 return -EPERM;
4281 }
4282
4283 spin_lock_bh(&adapter->mbx_lock);
4284 /* notify the PF of our intent to use this size of frame */
4285 ret = hw->mac.ops.set_rlpml(hw, max_frame);
4286 spin_unlock_bh(&adapter->mbx_lock);
4287 if (ret)
4288 return -EINVAL;
4289
4290 hw_dbg(hw, "changing MTU from %d to %d\n",
4291 netdev->mtu, new_mtu);
4292
4293 /* must set new MTU before calling down or up */
4294 WRITE_ONCE(netdev->mtu, new_mtu);
4295
4296 if (netif_running(netdev))
4297 ixgbevf_reinit_locked(adapter);
4298
4299 return 0;
4300}
4301
4302static int ixgbevf_suspend(struct device *dev_d)
4303{
4304 struct net_device *netdev = dev_get_drvdata(dev_d);
4305 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4306
4307 rtnl_lock();
4308 netif_device_detach(netdev);
4309
4310 if (netif_running(netdev))
4311 ixgbevf_close_suspend(adapter);
4312
4313 ixgbevf_clear_interrupt_scheme(adapter);
4314 rtnl_unlock();
4315
4316 return 0;
4317}
4318
4319static int ixgbevf_resume(struct device *dev_d)
4320{
4321 struct pci_dev *pdev = to_pci_dev(dev_d);
4322 struct net_device *netdev = pci_get_drvdata(pdev);
4323 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4324 u32 err;
4325
4326 adapter->hw.hw_addr = adapter->io_addr;
4327 smp_mb__before_atomic();
4328 clear_bit(__IXGBEVF_DISABLED, &adapter->state);
4329 pci_set_master(pdev);
4330
4331 ixgbevf_reset(adapter);
4332
4333 rtnl_lock();
4334 err = ixgbevf_init_interrupt_scheme(adapter);
4335 if (!err && netif_running(netdev))
4336 err = ixgbevf_open(netdev);
4337 rtnl_unlock();
4338 if (err)
4339 return err;
4340
4341 netif_device_attach(netdev);
4342
4343 return err;
4344}
4345
4346static void ixgbevf_shutdown(struct pci_dev *pdev)
4347{
4348 ixgbevf_suspend(&pdev->dev);
4349}
4350
4351static void ixgbevf_get_tx_ring_stats(struct rtnl_link_stats64 *stats,
4352 const struct ixgbevf_ring *ring)
4353{
4354 u64 bytes, packets;
4355 unsigned int start;
4356
4357 if (ring) {
4358 do {
4359 start = u64_stats_fetch_begin(&ring->syncp);
4360 bytes = ring->stats.bytes;
4361 packets = ring->stats.packets;
4362 } while (u64_stats_fetch_retry(&ring->syncp, start));
4363 stats->tx_bytes += bytes;
4364 stats->tx_packets += packets;
4365 }
4366}
4367
4368static void ixgbevf_get_stats(struct net_device *netdev,
4369 struct rtnl_link_stats64 *stats)
4370{
4371 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4372 unsigned int start;
4373 u64 bytes, packets;
4374 const struct ixgbevf_ring *ring;
4375 int i;
4376
4377 ixgbevf_update_stats(adapter);
4378
4379 stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc;
4380
4381 rcu_read_lock();
4382 for (i = 0; i < adapter->num_rx_queues; i++) {
4383 ring = adapter->rx_ring[i];
4384 do {
4385 start = u64_stats_fetch_begin(&ring->syncp);
4386 bytes = ring->stats.bytes;
4387 packets = ring->stats.packets;
4388 } while (u64_stats_fetch_retry(&ring->syncp, start));
4389 stats->rx_bytes += bytes;
4390 stats->rx_packets += packets;
4391 }
4392
4393 for (i = 0; i < adapter->num_tx_queues; i++) {
4394 ring = adapter->tx_ring[i];
4395 ixgbevf_get_tx_ring_stats(stats, ring);
4396 }
4397
4398 for (i = 0; i < adapter->num_xdp_queues; i++) {
4399 ring = adapter->xdp_ring[i];
4400 ixgbevf_get_tx_ring_stats(stats, ring);
4401 }
4402 rcu_read_unlock();
4403}
4404
4405#define IXGBEVF_MAX_MAC_HDR_LEN 127
4406#define IXGBEVF_MAX_NETWORK_HDR_LEN 511
4407
4408static netdev_features_t
4409ixgbevf_features_check(struct sk_buff *skb, struct net_device *dev,
4410 netdev_features_t features)
4411{
4412 unsigned int network_hdr_len, mac_hdr_len;
4413
4414 /* Make certain the headers can be described by a context descriptor */
4415 mac_hdr_len = skb_network_offset(skb);
4416 if (unlikely(mac_hdr_len > IXGBEVF_MAX_MAC_HDR_LEN))
4417 return features & ~(NETIF_F_HW_CSUM |
4418 NETIF_F_SCTP_CRC |
4419 NETIF_F_HW_VLAN_CTAG_TX |
4420 NETIF_F_TSO |
4421 NETIF_F_TSO6);
4422
4423 network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb);
4424 if (unlikely(network_hdr_len > IXGBEVF_MAX_NETWORK_HDR_LEN))
4425 return features & ~(NETIF_F_HW_CSUM |
4426 NETIF_F_SCTP_CRC |
4427 NETIF_F_TSO |
4428 NETIF_F_TSO6);
4429
4430 /* We can only support IPV4 TSO in tunnels if we can mangle the
4431 * inner IP ID field, so strip TSO if MANGLEID is not supported.
4432 */
4433 if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID))
4434 features &= ~NETIF_F_TSO;
4435
4436 return features;
4437}
4438
4439static int ixgbevf_xdp_setup(struct net_device *dev, struct bpf_prog *prog)
4440{
4441 int i, frame_size = dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
4442 struct ixgbevf_adapter *adapter = netdev_priv(dev);
4443 struct bpf_prog *old_prog;
4444
4445 /* verify ixgbevf ring attributes are sufficient for XDP */
4446 for (i = 0; i < adapter->num_rx_queues; i++) {
4447 struct ixgbevf_ring *ring = adapter->rx_ring[i];
4448
4449 if (frame_size > ixgbevf_rx_bufsz(ring))
4450 return -EINVAL;
4451 }
4452
4453 old_prog = xchg(&adapter->xdp_prog, prog);
4454
4455 /* If transitioning XDP modes reconfigure rings */
4456 if (!!prog != !!old_prog) {
4457 /* Hardware has to reinitialize queues and interrupts to
4458 * match packet buffer alignment. Unfortunately, the
4459 * hardware is not flexible enough to do this dynamically.
4460 */
4461 if (netif_running(dev))
4462 ixgbevf_close(dev);
4463
4464 ixgbevf_clear_interrupt_scheme(adapter);
4465 ixgbevf_init_interrupt_scheme(adapter);
4466
4467 if (netif_running(dev))
4468 ixgbevf_open(dev);
4469 } else {
4470 for (i = 0; i < adapter->num_rx_queues; i++)
4471 xchg(&adapter->rx_ring[i]->xdp_prog, adapter->xdp_prog);
4472 }
4473
4474 if (old_prog)
4475 bpf_prog_put(old_prog);
4476
4477 return 0;
4478}
4479
4480static int ixgbevf_xdp(struct net_device *dev, struct netdev_bpf *xdp)
4481{
4482 switch (xdp->command) {
4483 case XDP_SETUP_PROG:
4484 return ixgbevf_xdp_setup(dev, xdp->prog);
4485 default:
4486 return -EINVAL;
4487 }
4488}
4489
4490static const struct net_device_ops ixgbevf_netdev_ops = {
4491 .ndo_open = ixgbevf_open,
4492 .ndo_stop = ixgbevf_close,
4493 .ndo_start_xmit = ixgbevf_xmit_frame,
4494 .ndo_set_rx_mode = ixgbevf_set_rx_mode,
4495 .ndo_get_stats64 = ixgbevf_get_stats,
4496 .ndo_validate_addr = eth_validate_addr,
4497 .ndo_set_mac_address = ixgbevf_set_mac,
4498 .ndo_change_mtu = ixgbevf_change_mtu,
4499 .ndo_tx_timeout = ixgbevf_tx_timeout,
4500 .ndo_vlan_rx_add_vid = ixgbevf_vlan_rx_add_vid,
4501 .ndo_vlan_rx_kill_vid = ixgbevf_vlan_rx_kill_vid,
4502 .ndo_features_check = ixgbevf_features_check,
4503 .ndo_bpf = ixgbevf_xdp,
4504};
4505
4506static void ixgbevf_assign_netdev_ops(struct net_device *dev)
4507{
4508 dev->netdev_ops = &ixgbevf_netdev_ops;
4509 ixgbevf_set_ethtool_ops(dev);
4510 dev->watchdog_timeo = 5 * HZ;
4511}
4512
4513/**
4514 * ixgbevf_probe - Device Initialization Routine
4515 * @pdev: PCI device information struct
4516 * @ent: entry in ixgbevf_pci_tbl
4517 *
4518 * Returns 0 on success, negative on failure
4519 *
4520 * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
4521 * The OS initialization, configuring of the adapter private structure,
4522 * and a hardware reset occur.
4523 **/
4524static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
4525{
4526 struct net_device *netdev;
4527 struct ixgbevf_adapter *adapter = NULL;
4528 struct ixgbe_hw *hw = NULL;
4529 const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
4530 bool disable_dev = false;
4531 int err;
4532
4533 err = pci_enable_device(pdev);
4534 if (err)
4535 return err;
4536
4537 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
4538 if (err) {
4539 dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
4540 goto err_dma;
4541 }
4542
4543 err = pci_request_regions(pdev, ixgbevf_driver_name);
4544 if (err) {
4545 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
4546 goto err_pci_reg;
4547 }
4548
4549 pci_set_master(pdev);
4550
4551 netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),
4552 MAX_TX_QUEUES);
4553 if (!netdev) {
4554 err = -ENOMEM;
4555 goto err_alloc_etherdev;
4556 }
4557
4558 SET_NETDEV_DEV(netdev, &pdev->dev);
4559
4560 adapter = netdev_priv(netdev);
4561
4562 adapter->netdev = netdev;
4563 adapter->pdev = pdev;
4564 hw = &adapter->hw;
4565 hw->back = adapter;
4566 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
4567
4568 /* call save state here in standalone driver because it relies on
4569 * adapter struct to exist, and needs to call netdev_priv
4570 */
4571 pci_save_state(pdev);
4572
4573 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
4574 pci_resource_len(pdev, 0));
4575 adapter->io_addr = hw->hw_addr;
4576 if (!hw->hw_addr) {
4577 err = -EIO;
4578 goto err_ioremap;
4579 }
4580
4581 ixgbevf_assign_netdev_ops(netdev);
4582
4583 /* Setup HW API */
4584 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
4585 hw->mac.type = ii->mac;
4586
4587 memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops_legacy,
4588 sizeof(struct ixgbe_mbx_operations));
4589
4590 /* setup the private structure */
4591 err = ixgbevf_sw_init(adapter);
4592 if (err)
4593 goto err_sw_init;
4594
4595 /* The HW MAC address was set and/or determined in sw_init */
4596 if (!is_valid_ether_addr(netdev->dev_addr)) {
4597 pr_err("invalid MAC address\n");
4598 err = -EIO;
4599 goto err_sw_init;
4600 }
4601
4602 netdev->hw_features = NETIF_F_SG |
4603 NETIF_F_TSO |
4604 NETIF_F_TSO6 |
4605 NETIF_F_RXCSUM |
4606 NETIF_F_HW_CSUM |
4607 NETIF_F_SCTP_CRC;
4608
4609#define IXGBEVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
4610 NETIF_F_GSO_GRE_CSUM | \
4611 NETIF_F_GSO_IPXIP4 | \
4612 NETIF_F_GSO_IPXIP6 | \
4613 NETIF_F_GSO_UDP_TUNNEL | \
4614 NETIF_F_GSO_UDP_TUNNEL_CSUM)
4615
4616 netdev->gso_partial_features = IXGBEVF_GSO_PARTIAL_FEATURES;
4617 netdev->hw_features |= NETIF_F_GSO_PARTIAL |
4618 IXGBEVF_GSO_PARTIAL_FEATURES;
4619
4620 netdev->features = netdev->hw_features | NETIF_F_HIGHDMA;
4621
4622 netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
4623 netdev->mpls_features |= NETIF_F_SG |
4624 NETIF_F_TSO |
4625 NETIF_F_TSO6 |
4626 NETIF_F_HW_CSUM;
4627 netdev->mpls_features |= IXGBEVF_GSO_PARTIAL_FEATURES;
4628 netdev->hw_enc_features |= netdev->vlan_features;
4629
4630 /* set this bit last since it cannot be part of vlan_features */
4631 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
4632 NETIF_F_HW_VLAN_CTAG_RX |
4633 NETIF_F_HW_VLAN_CTAG_TX;
4634
4635 netdev->priv_flags |= IFF_UNICAST_FLT;
4636 netdev->xdp_features = NETDEV_XDP_ACT_BASIC;
4637
4638 /* MTU range: 68 - 1504 or 9710 */
4639 netdev->min_mtu = ETH_MIN_MTU;
4640 switch (adapter->hw.api_version) {
4641 case ixgbe_mbox_api_11:
4642 case ixgbe_mbox_api_12:
4643 case ixgbe_mbox_api_13:
4644 case ixgbe_mbox_api_14:
4645 case ixgbe_mbox_api_15:
4646 netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE -
4647 (ETH_HLEN + ETH_FCS_LEN);
4648 break;
4649 default:
4650 if (adapter->hw.mac.type != ixgbe_mac_82599_vf)
4651 netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE -
4652 (ETH_HLEN + ETH_FCS_LEN);
4653 else
4654 netdev->max_mtu = ETH_DATA_LEN + ETH_FCS_LEN;
4655 break;
4656 }
4657
4658 if (IXGBE_REMOVED(hw->hw_addr)) {
4659 err = -EIO;
4660 goto err_sw_init;
4661 }
4662
4663 timer_setup(&adapter->service_timer, ixgbevf_service_timer, 0);
4664
4665 INIT_WORK(&adapter->service_task, ixgbevf_service_task);
4666 set_bit(__IXGBEVF_SERVICE_INITED, &adapter->state);
4667 clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state);
4668
4669 err = ixgbevf_init_interrupt_scheme(adapter);
4670 if (err)
4671 goto err_sw_init;
4672
4673 strcpy(netdev->name, "eth%d");
4674
4675 err = register_netdev(netdev);
4676 if (err)
4677 goto err_register;
4678
4679 pci_set_drvdata(pdev, netdev);
4680 netif_carrier_off(netdev);
4681 ixgbevf_init_ipsec_offload(adapter);
4682
4683 ixgbevf_init_last_counter_stats(adapter);
4684
4685 /* print the VF info */
4686 dev_info(&pdev->dev, "%pM\n", netdev->dev_addr);
4687 dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type);
4688
4689 switch (hw->mac.type) {
4690 case ixgbe_mac_X550_vf:
4691 dev_info(&pdev->dev, "Intel(R) X550 Virtual Function\n");
4692 break;
4693 case ixgbe_mac_X540_vf:
4694 dev_info(&pdev->dev, "Intel(R) X540 Virtual Function\n");
4695 break;
4696 case ixgbe_mac_82599_vf:
4697 default:
4698 dev_info(&pdev->dev, "Intel(R) 82599 Virtual Function\n");
4699 break;
4700 }
4701
4702 return 0;
4703
4704err_register:
4705 ixgbevf_clear_interrupt_scheme(adapter);
4706err_sw_init:
4707 ixgbevf_reset_interrupt_capability(adapter);
4708 iounmap(adapter->io_addr);
4709 kfree(adapter->rss_key);
4710err_ioremap:
4711 disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state);
4712 free_netdev(netdev);
4713err_alloc_etherdev:
4714 pci_release_regions(pdev);
4715err_pci_reg:
4716err_dma:
4717 if (!adapter || disable_dev)
4718 pci_disable_device(pdev);
4719 return err;
4720}
4721
4722/**
4723 * ixgbevf_remove - Device Removal Routine
4724 * @pdev: PCI device information struct
4725 *
4726 * ixgbevf_remove is called by the PCI subsystem to alert the driver
4727 * that it should release a PCI device. The could be caused by a
4728 * Hot-Plug event, or because the driver is going to be removed from
4729 * memory.
4730 **/
4731static void ixgbevf_remove(struct pci_dev *pdev)
4732{
4733 struct net_device *netdev = pci_get_drvdata(pdev);
4734 struct ixgbevf_adapter *adapter;
4735 bool disable_dev;
4736
4737 if (!netdev)
4738 return;
4739
4740 adapter = netdev_priv(netdev);
4741
4742 set_bit(__IXGBEVF_REMOVING, &adapter->state);
4743 cancel_work_sync(&adapter->service_task);
4744
4745 if (netdev->reg_state == NETREG_REGISTERED)
4746 unregister_netdev(netdev);
4747
4748 ixgbevf_stop_ipsec_offload(adapter);
4749 ixgbevf_clear_interrupt_scheme(adapter);
4750 ixgbevf_reset_interrupt_capability(adapter);
4751
4752 iounmap(adapter->io_addr);
4753 pci_release_regions(pdev);
4754
4755 hw_dbg(&adapter->hw, "Remove complete\n");
4756
4757 kfree(adapter->rss_key);
4758 disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state);
4759 free_netdev(netdev);
4760
4761 if (disable_dev)
4762 pci_disable_device(pdev);
4763}
4764
4765/**
4766 * ixgbevf_io_error_detected - called when PCI error is detected
4767 * @pdev: Pointer to PCI device
4768 * @state: The current pci connection state
4769 *
4770 * This function is called after a PCI bus error affecting
4771 * this device has been detected.
4772 **/
4773static pci_ers_result_t ixgbevf_io_error_detected(struct pci_dev *pdev,
4774 pci_channel_state_t state)
4775{
4776 struct net_device *netdev = pci_get_drvdata(pdev);
4777 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4778
4779 if (!test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state))
4780 return PCI_ERS_RESULT_DISCONNECT;
4781
4782 rtnl_lock();
4783 netif_device_detach(netdev);
4784
4785 if (netif_running(netdev))
4786 ixgbevf_close_suspend(adapter);
4787
4788 if (state == pci_channel_io_perm_failure) {
4789 rtnl_unlock();
4790 return PCI_ERS_RESULT_DISCONNECT;
4791 }
4792
4793 if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state))
4794 pci_disable_device(pdev);
4795 rtnl_unlock();
4796
4797 /* Request a slot reset. */
4798 return PCI_ERS_RESULT_NEED_RESET;
4799}
4800
4801/**
4802 * ixgbevf_io_slot_reset - called after the pci bus has been reset.
4803 * @pdev: Pointer to PCI device
4804 *
4805 * Restart the card from scratch, as if from a cold-boot. Implementation
4806 * resembles the first-half of the ixgbevf_resume routine.
4807 **/
4808static pci_ers_result_t ixgbevf_io_slot_reset(struct pci_dev *pdev)
4809{
4810 struct net_device *netdev = pci_get_drvdata(pdev);
4811 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4812
4813 if (pci_enable_device_mem(pdev)) {
4814 dev_err(&pdev->dev,
4815 "Cannot re-enable PCI device after reset.\n");
4816 return PCI_ERS_RESULT_DISCONNECT;
4817 }
4818
4819 adapter->hw.hw_addr = adapter->io_addr;
4820 smp_mb__before_atomic();
4821 clear_bit(__IXGBEVF_DISABLED, &adapter->state);
4822 pci_set_master(pdev);
4823
4824 ixgbevf_reset(adapter);
4825
4826 return PCI_ERS_RESULT_RECOVERED;
4827}
4828
4829/**
4830 * ixgbevf_io_resume - called when traffic can start flowing again.
4831 * @pdev: Pointer to PCI device
4832 *
4833 * This callback is called when the error recovery driver tells us that
4834 * its OK to resume normal operation. Implementation resembles the
4835 * second-half of the ixgbevf_resume routine.
4836 **/
4837static void ixgbevf_io_resume(struct pci_dev *pdev)
4838{
4839 struct net_device *netdev = pci_get_drvdata(pdev);
4840
4841 rtnl_lock();
4842 if (netif_running(netdev))
4843 ixgbevf_open(netdev);
4844
4845 netif_device_attach(netdev);
4846 rtnl_unlock();
4847}
4848
4849/* PCI Error Recovery (ERS) */
4850static const struct pci_error_handlers ixgbevf_err_handler = {
4851 .error_detected = ixgbevf_io_error_detected,
4852 .slot_reset = ixgbevf_io_slot_reset,
4853 .resume = ixgbevf_io_resume,
4854};
4855
4856static DEFINE_SIMPLE_DEV_PM_OPS(ixgbevf_pm_ops, ixgbevf_suspend, ixgbevf_resume);
4857
4858static struct pci_driver ixgbevf_driver = {
4859 .name = ixgbevf_driver_name,
4860 .id_table = ixgbevf_pci_tbl,
4861 .probe = ixgbevf_probe,
4862 .remove = ixgbevf_remove,
4863
4864 /* Power Management Hooks */
4865 .driver.pm = pm_sleep_ptr(&ixgbevf_pm_ops),
4866
4867 .shutdown = ixgbevf_shutdown,
4868 .err_handler = &ixgbevf_err_handler
4869};
4870
4871/**
4872 * ixgbevf_init_module - Driver Registration Routine
4873 *
4874 * ixgbevf_init_module is the first routine called when the driver is
4875 * loaded. All it does is register with the PCI subsystem.
4876 **/
4877static int __init ixgbevf_init_module(void)
4878{
4879 int err;
4880
4881 pr_info("%s\n", ixgbevf_driver_string);
4882 pr_info("%s\n", ixgbevf_copyright);
4883 ixgbevf_wq = create_singlethread_workqueue(ixgbevf_driver_name);
4884 if (!ixgbevf_wq) {
4885 pr_err("%s: Failed to create workqueue\n", ixgbevf_driver_name);
4886 return -ENOMEM;
4887 }
4888
4889 err = pci_register_driver(&ixgbevf_driver);
4890 if (err) {
4891 destroy_workqueue(ixgbevf_wq);
4892 return err;
4893 }
4894
4895 return 0;
4896}
4897
4898module_init(ixgbevf_init_module);
4899
4900/**
4901 * ixgbevf_exit_module - Driver Exit Cleanup Routine
4902 *
4903 * ixgbevf_exit_module is called just before the driver is removed
4904 * from memory.
4905 **/
4906static void __exit ixgbevf_exit_module(void)
4907{
4908 pci_unregister_driver(&ixgbevf_driver);
4909 if (ixgbevf_wq) {
4910 destroy_workqueue(ixgbevf_wq);
4911 ixgbevf_wq = NULL;
4912 }
4913}
4914
4915#ifdef DEBUG
4916/**
4917 * ixgbevf_get_hw_dev_name - return device name string
4918 * used by hardware layer to print debugging information
4919 * @hw: pointer to private hardware struct
4920 **/
4921char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw)
4922{
4923 struct ixgbevf_adapter *adapter = hw->back;
4924
4925 return adapter->netdev->name;
4926}
4927
4928#endif
4929module_exit(ixgbevf_exit_module);
4930
4931/* ixgbevf_main.c */
1/*******************************************************************************
2
3 Intel 82599 Virtual Function driver
4 Copyright(c) 1999 - 2014 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, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26*******************************************************************************/
27
28
29/******************************************************************************
30 Copyright (c)2006 - 2007 Myricom, Inc. for some LRO specific code
31******************************************************************************/
32
33#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
34
35#include <linux/types.h>
36#include <linux/bitops.h>
37#include <linux/module.h>
38#include <linux/pci.h>
39#include <linux/netdevice.h>
40#include <linux/vmalloc.h>
41#include <linux/string.h>
42#include <linux/in.h>
43#include <linux/ip.h>
44#include <linux/tcp.h>
45#include <linux/sctp.h>
46#include <linux/ipv6.h>
47#include <linux/slab.h>
48#include <net/checksum.h>
49#include <net/ip6_checksum.h>
50#include <linux/ethtool.h>
51#include <linux/if.h>
52#include <linux/if_vlan.h>
53#include <linux/prefetch.h>
54
55#include "ixgbevf.h"
56
57const char ixgbevf_driver_name[] = "ixgbevf";
58static const char ixgbevf_driver_string[] =
59 "Intel(R) 10 Gigabit PCI Express Virtual Function Network Driver";
60
61#define DRV_VERSION "2.12.1-k"
62const char ixgbevf_driver_version[] = DRV_VERSION;
63static char ixgbevf_copyright[] =
64 "Copyright (c) 2009 - 2012 Intel Corporation.";
65
66static const struct ixgbevf_info *ixgbevf_info_tbl[] = {
67 [board_82599_vf] = &ixgbevf_82599_vf_info,
68 [board_X540_vf] = &ixgbevf_X540_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 DEFINE_PCI_DEVICE_TABLE(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 /* required last entry */
83 {0, }
84};
85MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl);
86
87MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
88MODULE_DESCRIPTION("Intel(R) 82599 Virtual Function Driver");
89MODULE_LICENSE("GPL");
90MODULE_VERSION(DRV_VERSION);
91
92#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
93static int debug = -1;
94module_param(debug, int, 0);
95MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
96
97/* forward decls */
98static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter);
99static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector);
100static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter);
101
102static void ixgbevf_remove_adapter(struct ixgbe_hw *hw)
103{
104 struct ixgbevf_adapter *adapter = hw->back;
105
106 if (!hw->hw_addr)
107 return;
108 hw->hw_addr = NULL;
109 dev_err(&adapter->pdev->dev, "Adapter removed\n");
110 if (test_bit(__IXGBEVF_WORK_INIT, &adapter->state))
111 schedule_work(&adapter->watchdog_task);
112}
113
114static void ixgbevf_check_remove(struct ixgbe_hw *hw, u32 reg)
115{
116 u32 value;
117
118 /* The following check not only optimizes a bit by not
119 * performing a read on the status register when the
120 * register just read was a status register read that
121 * returned IXGBE_FAILED_READ_REG. It also blocks any
122 * potential recursion.
123 */
124 if (reg == IXGBE_VFSTATUS) {
125 ixgbevf_remove_adapter(hw);
126 return;
127 }
128 value = ixgbevf_read_reg(hw, IXGBE_VFSTATUS);
129 if (value == IXGBE_FAILED_READ_REG)
130 ixgbevf_remove_adapter(hw);
131}
132
133u32 ixgbevf_read_reg(struct ixgbe_hw *hw, u32 reg)
134{
135 u8 __iomem *reg_addr = ACCESS_ONCE(hw->hw_addr);
136 u32 value;
137
138 if (IXGBE_REMOVED(reg_addr))
139 return IXGBE_FAILED_READ_REG;
140 value = readl(reg_addr + reg);
141 if (unlikely(value == IXGBE_FAILED_READ_REG))
142 ixgbevf_check_remove(hw, reg);
143 return value;
144}
145
146static inline void ixgbevf_release_rx_desc(struct ixgbevf_ring *rx_ring,
147 u32 val)
148{
149 rx_ring->next_to_use = val;
150
151 /*
152 * Force memory writes to complete before letting h/w
153 * know there are new descriptors to fetch. (Only
154 * applicable for weak-ordered memory model archs,
155 * such as IA-64).
156 */
157 wmb();
158 ixgbevf_write_tail(rx_ring, val);
159}
160
161/**
162 * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors
163 * @adapter: pointer to adapter struct
164 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
165 * @queue: queue to map the corresponding interrupt to
166 * @msix_vector: the vector to map to the corresponding queue
167 */
168static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction,
169 u8 queue, u8 msix_vector)
170{
171 u32 ivar, index;
172 struct ixgbe_hw *hw = &adapter->hw;
173 if (direction == -1) {
174 /* other causes */
175 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
176 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC);
177 ivar &= ~0xFF;
178 ivar |= msix_vector;
179 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar);
180 } else {
181 /* tx or rx causes */
182 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
183 index = ((16 * (queue & 1)) + (8 * direction));
184 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1));
185 ivar &= ~(0xFF << index);
186 ivar |= (msix_vector << index);
187 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar);
188 }
189}
190
191static void ixgbevf_unmap_and_free_tx_resource(struct ixgbevf_ring *tx_ring,
192 struct ixgbevf_tx_buffer *tx_buffer)
193{
194 if (tx_buffer->skb) {
195 dev_kfree_skb_any(tx_buffer->skb);
196 if (dma_unmap_len(tx_buffer, len))
197 dma_unmap_single(tx_ring->dev,
198 dma_unmap_addr(tx_buffer, dma),
199 dma_unmap_len(tx_buffer, len),
200 DMA_TO_DEVICE);
201 } else if (dma_unmap_len(tx_buffer, len)) {
202 dma_unmap_page(tx_ring->dev,
203 dma_unmap_addr(tx_buffer, dma),
204 dma_unmap_len(tx_buffer, len),
205 DMA_TO_DEVICE);
206 }
207 tx_buffer->next_to_watch = NULL;
208 tx_buffer->skb = NULL;
209 dma_unmap_len_set(tx_buffer, len, 0);
210 /* tx_buffer must be completely set up in the transmit path */
211}
212
213#define IXGBE_MAX_TXD_PWR 14
214#define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR)
215
216/* Tx Descriptors needed, worst case */
217#define TXD_USE_COUNT(S) DIV_ROUND_UP((S), IXGBE_MAX_DATA_PER_TXD)
218#define DESC_NEEDED (MAX_SKB_FRAGS + 4)
219
220static void ixgbevf_tx_timeout(struct net_device *netdev);
221
222/**
223 * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes
224 * @q_vector: board private structure
225 * @tx_ring: tx ring to clean
226 **/
227static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector,
228 struct ixgbevf_ring *tx_ring)
229{
230 struct ixgbevf_adapter *adapter = q_vector->adapter;
231 struct ixgbevf_tx_buffer *tx_buffer;
232 union ixgbe_adv_tx_desc *tx_desc;
233 unsigned int total_bytes = 0, total_packets = 0;
234 unsigned int budget = tx_ring->count / 2;
235 unsigned int i = tx_ring->next_to_clean;
236
237 if (test_bit(__IXGBEVF_DOWN, &adapter->state))
238 return true;
239
240 tx_buffer = &tx_ring->tx_buffer_info[i];
241 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
242 i -= tx_ring->count;
243
244 do {
245 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
246
247 /* if next_to_watch is not set then there is no work pending */
248 if (!eop_desc)
249 break;
250
251 /* prevent any other reads prior to eop_desc */
252 read_barrier_depends();
253
254 /* if DD is not set pending work has not been completed */
255 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
256 break;
257
258 /* clear next_to_watch to prevent false hangs */
259 tx_buffer->next_to_watch = NULL;
260
261 /* update the statistics for this packet */
262 total_bytes += tx_buffer->bytecount;
263 total_packets += tx_buffer->gso_segs;
264
265 /* free the skb */
266 dev_kfree_skb_any(tx_buffer->skb);
267
268 /* unmap skb header data */
269 dma_unmap_single(tx_ring->dev,
270 dma_unmap_addr(tx_buffer, dma),
271 dma_unmap_len(tx_buffer, len),
272 DMA_TO_DEVICE);
273
274 /* clear tx_buffer data */
275 tx_buffer->skb = NULL;
276 dma_unmap_len_set(tx_buffer, len, 0);
277
278 /* unmap remaining buffers */
279 while (tx_desc != eop_desc) {
280 tx_buffer++;
281 tx_desc++;
282 i++;
283 if (unlikely(!i)) {
284 i -= tx_ring->count;
285 tx_buffer = tx_ring->tx_buffer_info;
286 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
287 }
288
289 /* unmap any remaining paged data */
290 if (dma_unmap_len(tx_buffer, len)) {
291 dma_unmap_page(tx_ring->dev,
292 dma_unmap_addr(tx_buffer, dma),
293 dma_unmap_len(tx_buffer, len),
294 DMA_TO_DEVICE);
295 dma_unmap_len_set(tx_buffer, len, 0);
296 }
297 }
298
299 /* move us one more past the eop_desc for start of next pkt */
300 tx_buffer++;
301 tx_desc++;
302 i++;
303 if (unlikely(!i)) {
304 i -= tx_ring->count;
305 tx_buffer = tx_ring->tx_buffer_info;
306 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
307 }
308
309 /* issue prefetch for next Tx descriptor */
310 prefetch(tx_desc);
311
312 /* update budget accounting */
313 budget--;
314 } while (likely(budget));
315
316 i += tx_ring->count;
317 tx_ring->next_to_clean = i;
318 u64_stats_update_begin(&tx_ring->syncp);
319 tx_ring->stats.bytes += total_bytes;
320 tx_ring->stats.packets += total_packets;
321 u64_stats_update_end(&tx_ring->syncp);
322 q_vector->tx.total_bytes += total_bytes;
323 q_vector->tx.total_packets += total_packets;
324
325#define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
326 if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
327 (ixgbevf_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
328 /* Make sure that anybody stopping the queue after this
329 * sees the new next_to_clean.
330 */
331 smp_mb();
332
333 if (__netif_subqueue_stopped(tx_ring->netdev,
334 tx_ring->queue_index) &&
335 !test_bit(__IXGBEVF_DOWN, &adapter->state)) {
336 netif_wake_subqueue(tx_ring->netdev,
337 tx_ring->queue_index);
338 ++tx_ring->tx_stats.restart_queue;
339 }
340 }
341
342 return !!budget;
343}
344
345/**
346 * ixgbevf_receive_skb - Send a completed packet up the stack
347 * @q_vector: structure containing interrupt and ring information
348 * @skb: packet to send up
349 * @status: hardware indication of status of receive
350 * @rx_desc: rx descriptor
351 **/
352static void ixgbevf_receive_skb(struct ixgbevf_q_vector *q_vector,
353 struct sk_buff *skb, u8 status,
354 union ixgbe_adv_rx_desc *rx_desc)
355{
356 struct ixgbevf_adapter *adapter = q_vector->adapter;
357 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
358 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
359
360 if (is_vlan && test_bit(tag & VLAN_VID_MASK, adapter->active_vlans))
361 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
362
363 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
364 napi_gro_receive(&q_vector->napi, skb);
365 else
366 netif_rx(skb);
367}
368
369/**
370 * ixgbevf_rx_skb - Helper function to determine proper Rx method
371 * @q_vector: structure containing interrupt and ring information
372 * @skb: packet to send up
373 * @status: hardware indication of status of receive
374 * @rx_desc: rx descriptor
375 **/
376static void ixgbevf_rx_skb(struct ixgbevf_q_vector *q_vector,
377 struct sk_buff *skb, u8 status,
378 union ixgbe_adv_rx_desc *rx_desc)
379{
380#ifdef CONFIG_NET_RX_BUSY_POLL
381 skb_mark_napi_id(skb, &q_vector->napi);
382
383 if (ixgbevf_qv_busy_polling(q_vector)) {
384 netif_receive_skb(skb);
385 /* exit early if we busy polled */
386 return;
387 }
388#endif /* CONFIG_NET_RX_BUSY_POLL */
389
390 ixgbevf_receive_skb(q_vector, skb, status, rx_desc);
391}
392
393/**
394 * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
395 * @ring: pointer to Rx descriptor ring structure
396 * @status_err: hardware indication of status of receive
397 * @skb: skb currently being received and modified
398 **/
399static inline void ixgbevf_rx_checksum(struct ixgbevf_ring *ring,
400 u32 status_err, struct sk_buff *skb)
401{
402 skb_checksum_none_assert(skb);
403
404 /* Rx csum disabled */
405 if (!(ring->netdev->features & NETIF_F_RXCSUM))
406 return;
407
408 /* if IP and error */
409 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
410 (status_err & IXGBE_RXDADV_ERR_IPE)) {
411 ring->rx_stats.csum_err++;
412 return;
413 }
414
415 if (!(status_err & IXGBE_RXD_STAT_L4CS))
416 return;
417
418 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
419 ring->rx_stats.csum_err++;
420 return;
421 }
422
423 /* It must be a TCP or UDP packet with a valid checksum */
424 skb->ip_summed = CHECKSUM_UNNECESSARY;
425}
426
427/**
428 * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
429 * @rx_ring: rx descriptor ring (for a specific queue) to setup buffers on
430 **/
431static void ixgbevf_alloc_rx_buffers(struct ixgbevf_ring *rx_ring,
432 int cleaned_count)
433{
434 union ixgbe_adv_rx_desc *rx_desc;
435 struct ixgbevf_rx_buffer *bi;
436 unsigned int i = rx_ring->next_to_use;
437
438 while (cleaned_count--) {
439 rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
440 bi = &rx_ring->rx_buffer_info[i];
441
442 if (!bi->skb) {
443 struct sk_buff *skb;
444
445 skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
446 rx_ring->rx_buf_len);
447 if (!skb)
448 goto no_buffers;
449
450 bi->skb = skb;
451
452 bi->dma = dma_map_single(rx_ring->dev, skb->data,
453 rx_ring->rx_buf_len,
454 DMA_FROM_DEVICE);
455 if (dma_mapping_error(rx_ring->dev, bi->dma)) {
456 dev_kfree_skb(skb);
457 bi->skb = NULL;
458 dev_err(rx_ring->dev, "Rx DMA map failed\n");
459 break;
460 }
461 }
462 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
463
464 i++;
465 if (i == rx_ring->count)
466 i = 0;
467 }
468
469no_buffers:
470 rx_ring->rx_stats.alloc_rx_buff_failed++;
471 if (rx_ring->next_to_use != i)
472 ixgbevf_release_rx_desc(rx_ring, i);
473}
474
475static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter,
476 u32 qmask)
477{
478 struct ixgbe_hw *hw = &adapter->hw;
479
480 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, qmask);
481}
482
483static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
484 struct ixgbevf_ring *rx_ring,
485 int budget)
486{
487 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
488 struct ixgbevf_rx_buffer *rx_buffer_info, *next_buffer;
489 struct sk_buff *skb;
490 unsigned int i;
491 u32 len, staterr;
492 int cleaned_count = 0;
493 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
494
495 i = rx_ring->next_to_clean;
496 rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
497 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
498 rx_buffer_info = &rx_ring->rx_buffer_info[i];
499
500 while (staterr & IXGBE_RXD_STAT_DD) {
501 if (!budget)
502 break;
503 budget--;
504
505 rmb(); /* read descriptor and rx_buffer_info after status DD */
506 len = le16_to_cpu(rx_desc->wb.upper.length);
507 skb = rx_buffer_info->skb;
508 prefetch(skb->data - NET_IP_ALIGN);
509 rx_buffer_info->skb = NULL;
510
511 if (rx_buffer_info->dma) {
512 dma_unmap_single(rx_ring->dev, rx_buffer_info->dma,
513 rx_ring->rx_buf_len,
514 DMA_FROM_DEVICE);
515 rx_buffer_info->dma = 0;
516 skb_put(skb, len);
517 }
518
519 i++;
520 if (i == rx_ring->count)
521 i = 0;
522
523 next_rxd = IXGBEVF_RX_DESC(rx_ring, i);
524 prefetch(next_rxd);
525 cleaned_count++;
526
527 next_buffer = &rx_ring->rx_buffer_info[i];
528
529 if (!(staterr & IXGBE_RXD_STAT_EOP)) {
530 skb->next = next_buffer->skb;
531 IXGBE_CB(skb->next)->prev = skb;
532 rx_ring->rx_stats.non_eop_descs++;
533 goto next_desc;
534 }
535
536 /* we should not be chaining buffers, if we did drop the skb */
537 if (IXGBE_CB(skb)->prev) {
538 do {
539 struct sk_buff *this = skb;
540 skb = IXGBE_CB(skb)->prev;
541 dev_kfree_skb(this);
542 } while (skb);
543 goto next_desc;
544 }
545
546 /* ERR_MASK will only have valid bits if EOP set */
547 if (unlikely(staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK)) {
548 dev_kfree_skb_irq(skb);
549 goto next_desc;
550 }
551
552 ixgbevf_rx_checksum(rx_ring, staterr, skb);
553
554 /* probably a little skewed due to removing CRC */
555 total_rx_bytes += skb->len;
556 total_rx_packets++;
557
558 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
559
560 /* Workaround hardware that can't do proper VEPA multicast
561 * source pruning.
562 */
563 if ((skb->pkt_type == PACKET_BROADCAST ||
564 skb->pkt_type == PACKET_MULTICAST) &&
565 ether_addr_equal(rx_ring->netdev->dev_addr,
566 eth_hdr(skb)->h_source)) {
567 dev_kfree_skb_irq(skb);
568 goto next_desc;
569 }
570
571 ixgbevf_rx_skb(q_vector, skb, staterr, rx_desc);
572
573next_desc:
574 rx_desc->wb.upper.status_error = 0;
575
576 /* return some buffers to hardware, one at a time is too slow */
577 if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) {
578 ixgbevf_alloc_rx_buffers(rx_ring, cleaned_count);
579 cleaned_count = 0;
580 }
581
582 /* use prefetched values */
583 rx_desc = next_rxd;
584 rx_buffer_info = &rx_ring->rx_buffer_info[i];
585
586 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
587 }
588
589 rx_ring->next_to_clean = i;
590 cleaned_count = ixgbevf_desc_unused(rx_ring);
591
592 if (cleaned_count)
593 ixgbevf_alloc_rx_buffers(rx_ring, cleaned_count);
594
595 u64_stats_update_begin(&rx_ring->syncp);
596 rx_ring->stats.packets += total_rx_packets;
597 rx_ring->stats.bytes += total_rx_bytes;
598 u64_stats_update_end(&rx_ring->syncp);
599 q_vector->rx.total_packets += total_rx_packets;
600 q_vector->rx.total_bytes += total_rx_bytes;
601
602 return total_rx_packets;
603}
604
605/**
606 * ixgbevf_poll - NAPI polling calback
607 * @napi: napi struct with our devices info in it
608 * @budget: amount of work driver is allowed to do this pass, in packets
609 *
610 * This function will clean more than one or more rings associated with a
611 * q_vector.
612 **/
613static int ixgbevf_poll(struct napi_struct *napi, int budget)
614{
615 struct ixgbevf_q_vector *q_vector =
616 container_of(napi, struct ixgbevf_q_vector, napi);
617 struct ixgbevf_adapter *adapter = q_vector->adapter;
618 struct ixgbevf_ring *ring;
619 int per_ring_budget;
620 bool clean_complete = true;
621
622 ixgbevf_for_each_ring(ring, q_vector->tx)
623 clean_complete &= ixgbevf_clean_tx_irq(q_vector, ring);
624
625#ifdef CONFIG_NET_RX_BUSY_POLL
626 if (!ixgbevf_qv_lock_napi(q_vector))
627 return budget;
628#endif
629
630 /* attempt to distribute budget to each queue fairly, but don't allow
631 * the budget to go below 1 because we'll exit polling */
632 if (q_vector->rx.count > 1)
633 per_ring_budget = max(budget/q_vector->rx.count, 1);
634 else
635 per_ring_budget = budget;
636
637 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
638 ixgbevf_for_each_ring(ring, q_vector->rx)
639 clean_complete &= (ixgbevf_clean_rx_irq(q_vector, ring,
640 per_ring_budget)
641 < per_ring_budget);
642 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
643
644#ifdef CONFIG_NET_RX_BUSY_POLL
645 ixgbevf_qv_unlock_napi(q_vector);
646#endif
647
648 /* If all work not completed, return budget and keep polling */
649 if (!clean_complete)
650 return budget;
651 /* all work done, exit the polling mode */
652 napi_complete(napi);
653 if (adapter->rx_itr_setting & 1)
654 ixgbevf_set_itr(q_vector);
655 if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&
656 !test_bit(__IXGBEVF_REMOVING, &adapter->state))
657 ixgbevf_irq_enable_queues(adapter,
658 1 << q_vector->v_idx);
659
660 return 0;
661}
662
663/**
664 * ixgbevf_write_eitr - write VTEITR register in hardware specific way
665 * @q_vector: structure containing interrupt and ring information
666 */
667void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector)
668{
669 struct ixgbevf_adapter *adapter = q_vector->adapter;
670 struct ixgbe_hw *hw = &adapter->hw;
671 int v_idx = q_vector->v_idx;
672 u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
673
674 /*
675 * set the WDIS bit to not clear the timer bits and cause an
676 * immediate assertion of the interrupt
677 */
678 itr_reg |= IXGBE_EITR_CNT_WDIS;
679
680 IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg);
681}
682
683#ifdef CONFIG_NET_RX_BUSY_POLL
684/* must be called with local_bh_disable()d */
685static int ixgbevf_busy_poll_recv(struct napi_struct *napi)
686{
687 struct ixgbevf_q_vector *q_vector =
688 container_of(napi, struct ixgbevf_q_vector, napi);
689 struct ixgbevf_adapter *adapter = q_vector->adapter;
690 struct ixgbevf_ring *ring;
691 int found = 0;
692
693 if (test_bit(__IXGBEVF_DOWN, &adapter->state))
694 return LL_FLUSH_FAILED;
695
696 if (!ixgbevf_qv_lock_poll(q_vector))
697 return LL_FLUSH_BUSY;
698
699 ixgbevf_for_each_ring(ring, q_vector->rx) {
700 found = ixgbevf_clean_rx_irq(q_vector, ring, 4);
701#ifdef BP_EXTENDED_STATS
702 if (found)
703 ring->stats.cleaned += found;
704 else
705 ring->stats.misses++;
706#endif
707 if (found)
708 break;
709 }
710
711 ixgbevf_qv_unlock_poll(q_vector);
712
713 return found;
714}
715#endif /* CONFIG_NET_RX_BUSY_POLL */
716
717/**
718 * ixgbevf_configure_msix - Configure MSI-X hardware
719 * @adapter: board private structure
720 *
721 * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
722 * interrupts.
723 **/
724static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter)
725{
726 struct ixgbevf_q_vector *q_vector;
727 int q_vectors, v_idx;
728
729 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
730 adapter->eims_enable_mask = 0;
731
732 /*
733 * Populate the IVAR table and set the ITR values to the
734 * corresponding register.
735 */
736 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
737 struct ixgbevf_ring *ring;
738 q_vector = adapter->q_vector[v_idx];
739
740 ixgbevf_for_each_ring(ring, q_vector->rx)
741 ixgbevf_set_ivar(adapter, 0, ring->reg_idx, v_idx);
742
743 ixgbevf_for_each_ring(ring, q_vector->tx)
744 ixgbevf_set_ivar(adapter, 1, ring->reg_idx, v_idx);
745
746 if (q_vector->tx.ring && !q_vector->rx.ring) {
747 /* tx only vector */
748 if (adapter->tx_itr_setting == 1)
749 q_vector->itr = IXGBE_10K_ITR;
750 else
751 q_vector->itr = adapter->tx_itr_setting;
752 } else {
753 /* rx or rx/tx vector */
754 if (adapter->rx_itr_setting == 1)
755 q_vector->itr = IXGBE_20K_ITR;
756 else
757 q_vector->itr = adapter->rx_itr_setting;
758 }
759
760 /* add q_vector eims value to global eims_enable_mask */
761 adapter->eims_enable_mask |= 1 << v_idx;
762
763 ixgbevf_write_eitr(q_vector);
764 }
765
766 ixgbevf_set_ivar(adapter, -1, 1, v_idx);
767 /* setup eims_other and add value to global eims_enable_mask */
768 adapter->eims_other = 1 << v_idx;
769 adapter->eims_enable_mask |= adapter->eims_other;
770}
771
772enum latency_range {
773 lowest_latency = 0,
774 low_latency = 1,
775 bulk_latency = 2,
776 latency_invalid = 255
777};
778
779/**
780 * ixgbevf_update_itr - update the dynamic ITR value based on statistics
781 * @q_vector: structure containing interrupt and ring information
782 * @ring_container: structure containing ring performance data
783 *
784 * Stores a new ITR value based on packets and byte
785 * counts during the last interrupt. The advantage of per interrupt
786 * computation is faster updates and more accurate ITR for the current
787 * traffic pattern. Constants in this function were computed
788 * based on theoretical maximum wire speed and thresholds were set based
789 * on testing data as well as attempting to minimize response time
790 * while increasing bulk throughput.
791 **/
792static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector,
793 struct ixgbevf_ring_container *ring_container)
794{
795 int bytes = ring_container->total_bytes;
796 int packets = ring_container->total_packets;
797 u32 timepassed_us;
798 u64 bytes_perint;
799 u8 itr_setting = ring_container->itr;
800
801 if (packets == 0)
802 return;
803
804 /* simple throttlerate management
805 * 0-20MB/s lowest (100000 ints/s)
806 * 20-100MB/s low (20000 ints/s)
807 * 100-1249MB/s bulk (8000 ints/s)
808 */
809 /* what was last interrupt timeslice? */
810 timepassed_us = q_vector->itr >> 2;
811 bytes_perint = bytes / timepassed_us; /* bytes/usec */
812
813 switch (itr_setting) {
814 case lowest_latency:
815 if (bytes_perint > 10)
816 itr_setting = low_latency;
817 break;
818 case low_latency:
819 if (bytes_perint > 20)
820 itr_setting = bulk_latency;
821 else if (bytes_perint <= 10)
822 itr_setting = lowest_latency;
823 break;
824 case bulk_latency:
825 if (bytes_perint <= 20)
826 itr_setting = low_latency;
827 break;
828 }
829
830 /* clear work counters since we have the values we need */
831 ring_container->total_bytes = 0;
832 ring_container->total_packets = 0;
833
834 /* write updated itr to ring container */
835 ring_container->itr = itr_setting;
836}
837
838static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector)
839{
840 u32 new_itr = q_vector->itr;
841 u8 current_itr;
842
843 ixgbevf_update_itr(q_vector, &q_vector->tx);
844 ixgbevf_update_itr(q_vector, &q_vector->rx);
845
846 current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
847
848 switch (current_itr) {
849 /* counts and packets in update_itr are dependent on these numbers */
850 case lowest_latency:
851 new_itr = IXGBE_100K_ITR;
852 break;
853 case low_latency:
854 new_itr = IXGBE_20K_ITR;
855 break;
856 case bulk_latency:
857 default:
858 new_itr = IXGBE_8K_ITR;
859 break;
860 }
861
862 if (new_itr != q_vector->itr) {
863 /* do an exponential smoothing */
864 new_itr = (10 * new_itr * q_vector->itr) /
865 ((9 * new_itr) + q_vector->itr);
866
867 /* save the algorithm value here */
868 q_vector->itr = new_itr;
869
870 ixgbevf_write_eitr(q_vector);
871 }
872}
873
874static irqreturn_t ixgbevf_msix_other(int irq, void *data)
875{
876 struct ixgbevf_adapter *adapter = data;
877 struct ixgbe_hw *hw = &adapter->hw;
878
879 hw->mac.get_link_status = 1;
880
881 if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&
882 !test_bit(__IXGBEVF_REMOVING, &adapter->state))
883 mod_timer(&adapter->watchdog_timer, jiffies);
884
885 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_other);
886
887 return IRQ_HANDLED;
888}
889
890/**
891 * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues)
892 * @irq: unused
893 * @data: pointer to our q_vector struct for this interrupt vector
894 **/
895static irqreturn_t ixgbevf_msix_clean_rings(int irq, void *data)
896{
897 struct ixgbevf_q_vector *q_vector = data;
898
899 /* EIAM disabled interrupts (on this vector) for us */
900 if (q_vector->rx.ring || q_vector->tx.ring)
901 napi_schedule(&q_vector->napi);
902
903 return IRQ_HANDLED;
904}
905
906static inline void map_vector_to_rxq(struct ixgbevf_adapter *a, int v_idx,
907 int r_idx)
908{
909 struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
910
911 a->rx_ring[r_idx]->next = q_vector->rx.ring;
912 q_vector->rx.ring = a->rx_ring[r_idx];
913 q_vector->rx.count++;
914}
915
916static inline void map_vector_to_txq(struct ixgbevf_adapter *a, int v_idx,
917 int t_idx)
918{
919 struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
920
921 a->tx_ring[t_idx]->next = q_vector->tx.ring;
922 q_vector->tx.ring = a->tx_ring[t_idx];
923 q_vector->tx.count++;
924}
925
926/**
927 * ixgbevf_map_rings_to_vectors - Maps descriptor rings to vectors
928 * @adapter: board private structure to initialize
929 *
930 * This function maps descriptor rings to the queue-specific vectors
931 * we were allotted through the MSI-X enabling code. Ideally, we'd have
932 * one vector per ring/queue, but on a constrained vector budget, we
933 * group the rings as "efficiently" as possible. You would add new
934 * mapping configurations in here.
935 **/
936static int ixgbevf_map_rings_to_vectors(struct ixgbevf_adapter *adapter)
937{
938 int q_vectors;
939 int v_start = 0;
940 int rxr_idx = 0, txr_idx = 0;
941 int rxr_remaining = adapter->num_rx_queues;
942 int txr_remaining = adapter->num_tx_queues;
943 int i, j;
944 int rqpv, tqpv;
945 int err = 0;
946
947 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
948
949 /*
950 * The ideal configuration...
951 * We have enough vectors to map one per queue.
952 */
953 if (q_vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
954 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
955 map_vector_to_rxq(adapter, v_start, rxr_idx);
956
957 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
958 map_vector_to_txq(adapter, v_start, txr_idx);
959 goto out;
960 }
961
962 /*
963 * If we don't have enough vectors for a 1-to-1
964 * mapping, we'll have to group them so there are
965 * multiple queues per vector.
966 */
967 /* Re-adjusting *qpv takes care of the remainder. */
968 for (i = v_start; i < q_vectors; i++) {
969 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
970 for (j = 0; j < rqpv; j++) {
971 map_vector_to_rxq(adapter, i, rxr_idx);
972 rxr_idx++;
973 rxr_remaining--;
974 }
975 }
976 for (i = v_start; i < q_vectors; i++) {
977 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
978 for (j = 0; j < tqpv; j++) {
979 map_vector_to_txq(adapter, i, txr_idx);
980 txr_idx++;
981 txr_remaining--;
982 }
983 }
984
985out:
986 return err;
987}
988
989/**
990 * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
991 * @adapter: board private structure
992 *
993 * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
994 * interrupts from the kernel.
995 **/
996static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)
997{
998 struct net_device *netdev = adapter->netdev;
999 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1000 int vector, err;
1001 int ri = 0, ti = 0;
1002
1003 for (vector = 0; vector < q_vectors; vector++) {
1004 struct ixgbevf_q_vector *q_vector = adapter->q_vector[vector];
1005 struct msix_entry *entry = &adapter->msix_entries[vector];
1006
1007 if (q_vector->tx.ring && q_vector->rx.ring) {
1008 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1009 "%s-%s-%d", netdev->name, "TxRx", ri++);
1010 ti++;
1011 } else if (q_vector->rx.ring) {
1012 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1013 "%s-%s-%d", netdev->name, "rx", ri++);
1014 } else if (q_vector->tx.ring) {
1015 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1016 "%s-%s-%d", netdev->name, "tx", ti++);
1017 } else {
1018 /* skip this unused q_vector */
1019 continue;
1020 }
1021 err = request_irq(entry->vector, &ixgbevf_msix_clean_rings, 0,
1022 q_vector->name, q_vector);
1023 if (err) {
1024 hw_dbg(&adapter->hw,
1025 "request_irq failed for MSIX interrupt "
1026 "Error: %d\n", err);
1027 goto free_queue_irqs;
1028 }
1029 }
1030
1031 err = request_irq(adapter->msix_entries[vector].vector,
1032 &ixgbevf_msix_other, 0, netdev->name, adapter);
1033 if (err) {
1034 hw_dbg(&adapter->hw,
1035 "request_irq for msix_other failed: %d\n", err);
1036 goto free_queue_irqs;
1037 }
1038
1039 return 0;
1040
1041free_queue_irqs:
1042 while (vector) {
1043 vector--;
1044 free_irq(adapter->msix_entries[vector].vector,
1045 adapter->q_vector[vector]);
1046 }
1047 /* This failure is non-recoverable - it indicates the system is
1048 * out of MSIX vector resources and the VF driver cannot run
1049 * without them. Set the number of msix vectors to zero
1050 * indicating that not enough can be allocated. The error
1051 * will be returned to the user indicating device open failed.
1052 * Any further attempts to force the driver to open will also
1053 * fail. The only way to recover is to unload the driver and
1054 * reload it again. If the system has recovered some MSIX
1055 * vectors then it may succeed.
1056 */
1057 adapter->num_msix_vectors = 0;
1058 return err;
1059}
1060
1061static inline void ixgbevf_reset_q_vectors(struct ixgbevf_adapter *adapter)
1062{
1063 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1064
1065 for (i = 0; i < q_vectors; i++) {
1066 struct ixgbevf_q_vector *q_vector = adapter->q_vector[i];
1067 q_vector->rx.ring = NULL;
1068 q_vector->tx.ring = NULL;
1069 q_vector->rx.count = 0;
1070 q_vector->tx.count = 0;
1071 }
1072}
1073
1074/**
1075 * ixgbevf_request_irq - initialize interrupts
1076 * @adapter: board private structure
1077 *
1078 * Attempts to configure interrupts using the best available
1079 * capabilities of the hardware and kernel.
1080 **/
1081static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter)
1082{
1083 int err = 0;
1084
1085 err = ixgbevf_request_msix_irqs(adapter);
1086
1087 if (err)
1088 hw_dbg(&adapter->hw,
1089 "request_irq failed, Error %d\n", err);
1090
1091 return err;
1092}
1093
1094static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)
1095{
1096 int i, q_vectors;
1097
1098 q_vectors = adapter->num_msix_vectors;
1099 i = q_vectors - 1;
1100
1101 free_irq(adapter->msix_entries[i].vector, adapter);
1102 i--;
1103
1104 for (; i >= 0; i--) {
1105 /* free only the irqs that were actually requested */
1106 if (!adapter->q_vector[i]->rx.ring &&
1107 !adapter->q_vector[i]->tx.ring)
1108 continue;
1109
1110 free_irq(adapter->msix_entries[i].vector,
1111 adapter->q_vector[i]);
1112 }
1113
1114 ixgbevf_reset_q_vectors(adapter);
1115}
1116
1117/**
1118 * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
1119 * @adapter: board private structure
1120 **/
1121static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter)
1122{
1123 struct ixgbe_hw *hw = &adapter->hw;
1124 int i;
1125
1126 IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, 0);
1127 IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0);
1128 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, 0);
1129
1130 IXGBE_WRITE_FLUSH(hw);
1131
1132 for (i = 0; i < adapter->num_msix_vectors; i++)
1133 synchronize_irq(adapter->msix_entries[i].vector);
1134}
1135
1136/**
1137 * ixgbevf_irq_enable - Enable default interrupt generation settings
1138 * @adapter: board private structure
1139 **/
1140static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter)
1141{
1142 struct ixgbe_hw *hw = &adapter->hw;
1143
1144 IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, adapter->eims_enable_mask);
1145 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, adapter->eims_enable_mask);
1146 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_enable_mask);
1147}
1148
1149/**
1150 * ixgbevf_configure_tx_ring - Configure 82599 VF Tx ring after Reset
1151 * @adapter: board private structure
1152 * @ring: structure containing ring specific data
1153 *
1154 * Configure the Tx descriptor ring after a reset.
1155 **/
1156static void ixgbevf_configure_tx_ring(struct ixgbevf_adapter *adapter,
1157 struct ixgbevf_ring *ring)
1158{
1159 struct ixgbe_hw *hw = &adapter->hw;
1160 u64 tdba = ring->dma;
1161 int wait_loop = 10;
1162 u32 txdctl = IXGBE_TXDCTL_ENABLE;
1163 u8 reg_idx = ring->reg_idx;
1164
1165 /* disable queue to avoid issues while updating state */
1166 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
1167 IXGBE_WRITE_FLUSH(hw);
1168
1169 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(reg_idx), tdba & DMA_BIT_MASK(32));
1170 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(reg_idx), tdba >> 32);
1171 IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(reg_idx),
1172 ring->count * sizeof(union ixgbe_adv_tx_desc));
1173
1174 /* disable head writeback */
1175 IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAH(reg_idx), 0);
1176 IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAL(reg_idx), 0);
1177
1178 /* enable relaxed ordering */
1179 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(reg_idx),
1180 (IXGBE_DCA_TXCTRL_DESC_RRO_EN |
1181 IXGBE_DCA_TXCTRL_DATA_RRO_EN));
1182
1183 /* reset head and tail pointers */
1184 IXGBE_WRITE_REG(hw, IXGBE_VFTDH(reg_idx), 0);
1185 IXGBE_WRITE_REG(hw, IXGBE_VFTDT(reg_idx), 0);
1186 ring->tail = adapter->io_addr + IXGBE_VFTDT(reg_idx);
1187
1188 /* reset ntu and ntc to place SW in sync with hardwdare */
1189 ring->next_to_clean = 0;
1190 ring->next_to_use = 0;
1191
1192 /* In order to avoid issues WTHRESH + PTHRESH should always be equal
1193 * to or less than the number of on chip descriptors, which is
1194 * currently 40.
1195 */
1196 txdctl |= (8 << 16); /* WTHRESH = 8 */
1197
1198 /* Setting PTHRESH to 32 both improves performance */
1199 txdctl |= (1 << 8) | /* HTHRESH = 1 */
1200 32; /* PTHRESH = 32 */
1201
1202 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), txdctl);
1203
1204 /* poll to verify queue is enabled */
1205 do {
1206 usleep_range(1000, 2000);
1207 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(reg_idx));
1208 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
1209 if (!wait_loop)
1210 pr_err("Could not enable Tx Queue %d\n", reg_idx);
1211}
1212
1213/**
1214 * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1215 * @adapter: board private structure
1216 *
1217 * Configure the Tx unit of the MAC after a reset.
1218 **/
1219static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter)
1220{
1221 u32 i;
1222
1223 /* Setup the HW Tx Head and Tail descriptor pointers */
1224 for (i = 0; i < adapter->num_tx_queues; i++)
1225 ixgbevf_configure_tx_ring(adapter, adapter->tx_ring[i]);
1226}
1227
1228#define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1229
1230static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter, int index)
1231{
1232 struct ixgbevf_ring *rx_ring;
1233 struct ixgbe_hw *hw = &adapter->hw;
1234 u32 srrctl;
1235
1236 rx_ring = adapter->rx_ring[index];
1237
1238 srrctl = IXGBE_SRRCTL_DROP_EN;
1239
1240 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1241
1242 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
1243 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1244
1245 IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl);
1246}
1247
1248static void ixgbevf_setup_psrtype(struct ixgbevf_adapter *adapter)
1249{
1250 struct ixgbe_hw *hw = &adapter->hw;
1251
1252 /* PSRTYPE must be initialized in 82599 */
1253 u32 psrtype = IXGBE_PSRTYPE_TCPHDR | IXGBE_PSRTYPE_UDPHDR |
1254 IXGBE_PSRTYPE_IPV4HDR | IXGBE_PSRTYPE_IPV6HDR |
1255 IXGBE_PSRTYPE_L2HDR;
1256
1257 if (adapter->num_rx_queues > 1)
1258 psrtype |= 1 << 29;
1259
1260 IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype);
1261}
1262
1263static void ixgbevf_set_rx_buffer_len(struct ixgbevf_adapter *adapter)
1264{
1265 struct ixgbe_hw *hw = &adapter->hw;
1266 struct net_device *netdev = adapter->netdev;
1267 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1268 int i;
1269 u16 rx_buf_len;
1270
1271 /* notify the PF of our intent to use this size of frame */
1272 ixgbevf_rlpml_set_vf(hw, max_frame);
1273
1274 /* PF will allow an extra 4 bytes past for vlan tagged frames */
1275 max_frame += VLAN_HLEN;
1276
1277 /*
1278 * Allocate buffer sizes that fit well into 32K and
1279 * take into account max frame size of 9.5K
1280 */
1281 if ((hw->mac.type == ixgbe_mac_X540_vf) &&
1282 (max_frame <= MAXIMUM_ETHERNET_VLAN_SIZE))
1283 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1284 else if (max_frame <= IXGBEVF_RXBUFFER_2K)
1285 rx_buf_len = IXGBEVF_RXBUFFER_2K;
1286 else if (max_frame <= IXGBEVF_RXBUFFER_4K)
1287 rx_buf_len = IXGBEVF_RXBUFFER_4K;
1288 else if (max_frame <= IXGBEVF_RXBUFFER_8K)
1289 rx_buf_len = IXGBEVF_RXBUFFER_8K;
1290 else
1291 rx_buf_len = IXGBEVF_RXBUFFER_10K;
1292
1293 for (i = 0; i < adapter->num_rx_queues; i++)
1294 adapter->rx_ring[i]->rx_buf_len = rx_buf_len;
1295}
1296
1297#define IXGBEVF_MAX_RX_DESC_POLL 10
1298static void ixgbevf_disable_rx_queue(struct ixgbevf_adapter *adapter,
1299 struct ixgbevf_ring *ring)
1300{
1301 struct ixgbe_hw *hw = &adapter->hw;
1302 int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1303 u32 rxdctl;
1304 u8 reg_idx = ring->reg_idx;
1305
1306 if (IXGBE_REMOVED(hw->hw_addr))
1307 return;
1308 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1309 rxdctl &= ~IXGBE_RXDCTL_ENABLE;
1310
1311 /* write value back with RXDCTL.ENABLE bit cleared */
1312 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1313
1314 /* the hardware may take up to 100us to really disable the rx queue */
1315 do {
1316 udelay(10);
1317 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1318 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
1319
1320 if (!wait_loop)
1321 pr_err("RXDCTL.ENABLE queue %d not cleared while polling\n",
1322 reg_idx);
1323}
1324
1325static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter,
1326 struct ixgbevf_ring *ring)
1327{
1328 struct ixgbe_hw *hw = &adapter->hw;
1329 int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1330 u32 rxdctl;
1331 u8 reg_idx = ring->reg_idx;
1332
1333 if (IXGBE_REMOVED(hw->hw_addr))
1334 return;
1335 do {
1336 usleep_range(1000, 2000);
1337 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1338 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
1339
1340 if (!wait_loop)
1341 pr_err("RXDCTL.ENABLE queue %d not set while polling\n",
1342 reg_idx);
1343}
1344
1345static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter *adapter,
1346 struct ixgbevf_ring *ring)
1347{
1348 struct ixgbe_hw *hw = &adapter->hw;
1349 u64 rdba = ring->dma;
1350 u32 rxdctl;
1351 u8 reg_idx = ring->reg_idx;
1352
1353 /* disable queue to avoid issues while updating state */
1354 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1355 ixgbevf_disable_rx_queue(adapter, ring);
1356
1357 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(reg_idx), rdba & DMA_BIT_MASK(32));
1358 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(reg_idx), rdba >> 32);
1359 IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(reg_idx),
1360 ring->count * sizeof(union ixgbe_adv_rx_desc));
1361
1362 /* enable relaxed ordering */
1363 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),
1364 IXGBE_DCA_RXCTRL_DESC_RRO_EN);
1365
1366 /* reset head and tail pointers */
1367 IXGBE_WRITE_REG(hw, IXGBE_VFRDH(reg_idx), 0);
1368 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(reg_idx), 0);
1369 ring->tail = adapter->io_addr + IXGBE_VFRDT(reg_idx);
1370
1371 /* reset ntu and ntc to place SW in sync with hardwdare */
1372 ring->next_to_clean = 0;
1373 ring->next_to_use = 0;
1374
1375 ixgbevf_configure_srrctl(adapter, reg_idx);
1376
1377 /* prevent DMA from exceeding buffer space available */
1378 rxdctl &= ~IXGBE_RXDCTL_RLPMLMASK;
1379 rxdctl |= ring->rx_buf_len | IXGBE_RXDCTL_RLPML_EN;
1380 rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME;
1381 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1382
1383 ixgbevf_rx_desc_queue_enable(adapter, ring);
1384 ixgbevf_alloc_rx_buffers(ring, ixgbevf_desc_unused(ring));
1385}
1386
1387/**
1388 * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
1389 * @adapter: board private structure
1390 *
1391 * Configure the Rx unit of the MAC after a reset.
1392 **/
1393static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)
1394{
1395 int i;
1396
1397 ixgbevf_setup_psrtype(adapter);
1398
1399 /* set_rx_buffer_len must be called before ring initialization */
1400 ixgbevf_set_rx_buffer_len(adapter);
1401
1402 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1403 * the Base and Length of the Rx Descriptor Ring */
1404 for (i = 0; i < adapter->num_rx_queues; i++)
1405 ixgbevf_configure_rx_ring(adapter, adapter->rx_ring[i]);
1406}
1407
1408static int ixgbevf_vlan_rx_add_vid(struct net_device *netdev,
1409 __be16 proto, u16 vid)
1410{
1411 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1412 struct ixgbe_hw *hw = &adapter->hw;
1413 int err;
1414
1415 spin_lock_bh(&adapter->mbx_lock);
1416
1417 /* add VID to filter table */
1418 err = hw->mac.ops.set_vfta(hw, vid, 0, true);
1419
1420 spin_unlock_bh(&adapter->mbx_lock);
1421
1422 /* translate error return types so error makes sense */
1423 if (err == IXGBE_ERR_MBX)
1424 return -EIO;
1425
1426 if (err == IXGBE_ERR_INVALID_ARGUMENT)
1427 return -EACCES;
1428
1429 set_bit(vid, adapter->active_vlans);
1430
1431 return err;
1432}
1433
1434static int ixgbevf_vlan_rx_kill_vid(struct net_device *netdev,
1435 __be16 proto, u16 vid)
1436{
1437 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1438 struct ixgbe_hw *hw = &adapter->hw;
1439 int err = -EOPNOTSUPP;
1440
1441 spin_lock_bh(&adapter->mbx_lock);
1442
1443 /* remove VID from filter table */
1444 err = hw->mac.ops.set_vfta(hw, vid, 0, false);
1445
1446 spin_unlock_bh(&adapter->mbx_lock);
1447
1448 clear_bit(vid, adapter->active_vlans);
1449
1450 return err;
1451}
1452
1453static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter)
1454{
1455 u16 vid;
1456
1457 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1458 ixgbevf_vlan_rx_add_vid(adapter->netdev,
1459 htons(ETH_P_8021Q), vid);
1460}
1461
1462static int ixgbevf_write_uc_addr_list(struct net_device *netdev)
1463{
1464 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1465 struct ixgbe_hw *hw = &adapter->hw;
1466 int count = 0;
1467
1468 if ((netdev_uc_count(netdev)) > 10) {
1469 pr_err("Too many unicast filters - No Space\n");
1470 return -ENOSPC;
1471 }
1472
1473 if (!netdev_uc_empty(netdev)) {
1474 struct netdev_hw_addr *ha;
1475 netdev_for_each_uc_addr(ha, netdev) {
1476 hw->mac.ops.set_uc_addr(hw, ++count, ha->addr);
1477 udelay(200);
1478 }
1479 } else {
1480 /*
1481 * If the list is empty then send message to PF driver to
1482 * clear all macvlans on this VF.
1483 */
1484 hw->mac.ops.set_uc_addr(hw, 0, NULL);
1485 }
1486
1487 return count;
1488}
1489
1490/**
1491 * ixgbevf_set_rx_mode - Multicast and unicast set
1492 * @netdev: network interface device structure
1493 *
1494 * The set_rx_method entry point is called whenever the multicast address
1495 * list, unicast address list or the network interface flags are updated.
1496 * This routine is responsible for configuring the hardware for proper
1497 * multicast mode and configuring requested unicast filters.
1498 **/
1499static void ixgbevf_set_rx_mode(struct net_device *netdev)
1500{
1501 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1502 struct ixgbe_hw *hw = &adapter->hw;
1503
1504 spin_lock_bh(&adapter->mbx_lock);
1505
1506 /* reprogram multicast list */
1507 hw->mac.ops.update_mc_addr_list(hw, netdev);
1508
1509 ixgbevf_write_uc_addr_list(netdev);
1510
1511 spin_unlock_bh(&adapter->mbx_lock);
1512}
1513
1514static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter)
1515{
1516 int q_idx;
1517 struct ixgbevf_q_vector *q_vector;
1518 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1519
1520 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1521 q_vector = adapter->q_vector[q_idx];
1522#ifdef CONFIG_NET_RX_BUSY_POLL
1523 ixgbevf_qv_init_lock(adapter->q_vector[q_idx]);
1524#endif
1525 napi_enable(&q_vector->napi);
1526 }
1527}
1528
1529static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter)
1530{
1531 int q_idx;
1532 struct ixgbevf_q_vector *q_vector;
1533 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1534
1535 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1536 q_vector = adapter->q_vector[q_idx];
1537 napi_disable(&q_vector->napi);
1538#ifdef CONFIG_NET_RX_BUSY_POLL
1539 while (!ixgbevf_qv_disable(adapter->q_vector[q_idx])) {
1540 pr_info("QV %d locked\n", q_idx);
1541 usleep_range(1000, 20000);
1542 }
1543#endif /* CONFIG_NET_RX_BUSY_POLL */
1544 }
1545}
1546
1547static int ixgbevf_configure_dcb(struct ixgbevf_adapter *adapter)
1548{
1549 struct ixgbe_hw *hw = &adapter->hw;
1550 unsigned int def_q = 0;
1551 unsigned int num_tcs = 0;
1552 unsigned int num_rx_queues = 1;
1553 int err;
1554
1555 spin_lock_bh(&adapter->mbx_lock);
1556
1557 /* fetch queue configuration from the PF */
1558 err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
1559
1560 spin_unlock_bh(&adapter->mbx_lock);
1561
1562 if (err)
1563 return err;
1564
1565 if (num_tcs > 1) {
1566 /* update default Tx ring register index */
1567 adapter->tx_ring[0]->reg_idx = def_q;
1568
1569 /* we need as many queues as traffic classes */
1570 num_rx_queues = num_tcs;
1571 }
1572
1573 /* if we have a bad config abort request queue reset */
1574 if (adapter->num_rx_queues != num_rx_queues) {
1575 /* force mailbox timeout to prevent further messages */
1576 hw->mbx.timeout = 0;
1577
1578 /* wait for watchdog to come around and bail us out */
1579 adapter->flags |= IXGBEVF_FLAG_QUEUE_RESET_REQUESTED;
1580 }
1581
1582 return 0;
1583}
1584
1585static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
1586{
1587 ixgbevf_configure_dcb(adapter);
1588
1589 ixgbevf_set_rx_mode(adapter->netdev);
1590
1591 ixgbevf_restore_vlan(adapter);
1592
1593 ixgbevf_configure_tx(adapter);
1594 ixgbevf_configure_rx(adapter);
1595}
1596
1597static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter)
1598{
1599 /* Only save pre-reset stats if there are some */
1600 if (adapter->stats.vfgprc || adapter->stats.vfgptc) {
1601 adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc -
1602 adapter->stats.base_vfgprc;
1603 adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc -
1604 adapter->stats.base_vfgptc;
1605 adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc -
1606 adapter->stats.base_vfgorc;
1607 adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc -
1608 adapter->stats.base_vfgotc;
1609 adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc -
1610 adapter->stats.base_vfmprc;
1611 }
1612}
1613
1614static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
1615{
1616 struct ixgbe_hw *hw = &adapter->hw;
1617
1618 adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC);
1619 adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB);
1620 adapter->stats.last_vfgorc |=
1621 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32);
1622 adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC);
1623 adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB);
1624 adapter->stats.last_vfgotc |=
1625 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32);
1626 adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC);
1627
1628 adapter->stats.base_vfgprc = adapter->stats.last_vfgprc;
1629 adapter->stats.base_vfgorc = adapter->stats.last_vfgorc;
1630 adapter->stats.base_vfgptc = adapter->stats.last_vfgptc;
1631 adapter->stats.base_vfgotc = adapter->stats.last_vfgotc;
1632 adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;
1633}
1634
1635static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
1636{
1637 struct ixgbe_hw *hw = &adapter->hw;
1638 int api[] = { ixgbe_mbox_api_11,
1639 ixgbe_mbox_api_10,
1640 ixgbe_mbox_api_unknown };
1641 int err = 0, idx = 0;
1642
1643 spin_lock_bh(&adapter->mbx_lock);
1644
1645 while (api[idx] != ixgbe_mbox_api_unknown) {
1646 err = ixgbevf_negotiate_api_version(hw, api[idx]);
1647 if (!err)
1648 break;
1649 idx++;
1650 }
1651
1652 spin_unlock_bh(&adapter->mbx_lock);
1653}
1654
1655static void ixgbevf_up_complete(struct ixgbevf_adapter *adapter)
1656{
1657 struct net_device *netdev = adapter->netdev;
1658 struct ixgbe_hw *hw = &adapter->hw;
1659
1660 ixgbevf_configure_msix(adapter);
1661
1662 spin_lock_bh(&adapter->mbx_lock);
1663
1664 if (is_valid_ether_addr(hw->mac.addr))
1665 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
1666 else
1667 hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0);
1668
1669 spin_unlock_bh(&adapter->mbx_lock);
1670
1671 smp_mb__before_clear_bit();
1672 clear_bit(__IXGBEVF_DOWN, &adapter->state);
1673 ixgbevf_napi_enable_all(adapter);
1674
1675 /* enable transmits */
1676 netif_tx_start_all_queues(netdev);
1677
1678 ixgbevf_save_reset_stats(adapter);
1679 ixgbevf_init_last_counter_stats(adapter);
1680
1681 hw->mac.get_link_status = 1;
1682 mod_timer(&adapter->watchdog_timer, jiffies);
1683}
1684
1685void ixgbevf_up(struct ixgbevf_adapter *adapter)
1686{
1687 struct ixgbe_hw *hw = &adapter->hw;
1688
1689 ixgbevf_configure(adapter);
1690
1691 ixgbevf_up_complete(adapter);
1692
1693 /* clear any pending interrupts, may auto mask */
1694 IXGBE_READ_REG(hw, IXGBE_VTEICR);
1695
1696 ixgbevf_irq_enable(adapter);
1697}
1698
1699/**
1700 * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
1701 * @rx_ring: ring to free buffers from
1702 **/
1703static void ixgbevf_clean_rx_ring(struct ixgbevf_ring *rx_ring)
1704{
1705 unsigned long size;
1706 unsigned int i;
1707
1708 if (!rx_ring->rx_buffer_info)
1709 return;
1710
1711 /* Free all the Rx ring sk_buffs */
1712 for (i = 0; i < rx_ring->count; i++) {
1713 struct ixgbevf_rx_buffer *rx_buffer_info;
1714
1715 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1716 if (rx_buffer_info->dma) {
1717 dma_unmap_single(rx_ring->dev, rx_buffer_info->dma,
1718 rx_ring->rx_buf_len,
1719 DMA_FROM_DEVICE);
1720 rx_buffer_info->dma = 0;
1721 }
1722 if (rx_buffer_info->skb) {
1723 struct sk_buff *skb = rx_buffer_info->skb;
1724 rx_buffer_info->skb = NULL;
1725 do {
1726 struct sk_buff *this = skb;
1727 skb = IXGBE_CB(skb)->prev;
1728 dev_kfree_skb(this);
1729 } while (skb);
1730 }
1731 }
1732
1733 size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
1734 memset(rx_ring->rx_buffer_info, 0, size);
1735
1736 /* Zero out the descriptor ring */
1737 memset(rx_ring->desc, 0, rx_ring->size);
1738}
1739
1740/**
1741 * ixgbevf_clean_tx_ring - Free Tx Buffers
1742 * @tx_ring: ring to be cleaned
1743 **/
1744static void ixgbevf_clean_tx_ring(struct ixgbevf_ring *tx_ring)
1745{
1746 struct ixgbevf_tx_buffer *tx_buffer_info;
1747 unsigned long size;
1748 unsigned int i;
1749
1750 if (!tx_ring->tx_buffer_info)
1751 return;
1752
1753 /* Free all the Tx ring sk_buffs */
1754 for (i = 0; i < tx_ring->count; i++) {
1755 tx_buffer_info = &tx_ring->tx_buffer_info[i];
1756 ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
1757 }
1758
1759 size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
1760 memset(tx_ring->tx_buffer_info, 0, size);
1761
1762 memset(tx_ring->desc, 0, tx_ring->size);
1763}
1764
1765/**
1766 * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
1767 * @adapter: board private structure
1768 **/
1769static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter)
1770{
1771 int i;
1772
1773 for (i = 0; i < adapter->num_rx_queues; i++)
1774 ixgbevf_clean_rx_ring(adapter->rx_ring[i]);
1775}
1776
1777/**
1778 * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
1779 * @adapter: board private structure
1780 **/
1781static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter)
1782{
1783 int i;
1784
1785 for (i = 0; i < adapter->num_tx_queues; i++)
1786 ixgbevf_clean_tx_ring(adapter->tx_ring[i]);
1787}
1788
1789void ixgbevf_down(struct ixgbevf_adapter *adapter)
1790{
1791 struct net_device *netdev = adapter->netdev;
1792 struct ixgbe_hw *hw = &adapter->hw;
1793 int i;
1794
1795 /* signal that we are down to the interrupt handler */
1796 if (test_and_set_bit(__IXGBEVF_DOWN, &adapter->state))
1797 return; /* do nothing if already down */
1798
1799 /* disable all enabled rx queues */
1800 for (i = 0; i < adapter->num_rx_queues; i++)
1801 ixgbevf_disable_rx_queue(adapter, adapter->rx_ring[i]);
1802
1803 netif_tx_disable(netdev);
1804
1805 msleep(10);
1806
1807 netif_tx_stop_all_queues(netdev);
1808
1809 ixgbevf_irq_disable(adapter);
1810
1811 ixgbevf_napi_disable_all(adapter);
1812
1813 del_timer_sync(&adapter->watchdog_timer);
1814 /* can't call flush scheduled work here because it can deadlock
1815 * if linkwatch_event tries to acquire the rtnl_lock which we are
1816 * holding */
1817 while (adapter->flags & IXGBE_FLAG_IN_WATCHDOG_TASK)
1818 msleep(1);
1819
1820 /* disable transmits in the hardware now that interrupts are off */
1821 for (i = 0; i < adapter->num_tx_queues; i++) {
1822 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
1823
1824 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx),
1825 IXGBE_TXDCTL_SWFLSH);
1826 }
1827
1828 netif_carrier_off(netdev);
1829
1830 if (!pci_channel_offline(adapter->pdev))
1831 ixgbevf_reset(adapter);
1832
1833 ixgbevf_clean_all_tx_rings(adapter);
1834 ixgbevf_clean_all_rx_rings(adapter);
1835}
1836
1837void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)
1838{
1839 WARN_ON(in_interrupt());
1840
1841 while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
1842 msleep(1);
1843
1844 ixgbevf_down(adapter);
1845 ixgbevf_up(adapter);
1846
1847 clear_bit(__IXGBEVF_RESETTING, &adapter->state);
1848}
1849
1850void ixgbevf_reset(struct ixgbevf_adapter *adapter)
1851{
1852 struct ixgbe_hw *hw = &adapter->hw;
1853 struct net_device *netdev = adapter->netdev;
1854
1855 if (hw->mac.ops.reset_hw(hw)) {
1856 hw_dbg(hw, "PF still resetting\n");
1857 } else {
1858 hw->mac.ops.init_hw(hw);
1859 ixgbevf_negotiate_api(adapter);
1860 }
1861
1862 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1863 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1864 netdev->addr_len);
1865 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1866 netdev->addr_len);
1867 }
1868}
1869
1870static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter,
1871 int vectors)
1872{
1873 int vector_threshold;
1874
1875 /* We'll want at least 2 (vector_threshold):
1876 * 1) TxQ[0] + RxQ[0] handler
1877 * 2) Other (Link Status Change, etc.)
1878 */
1879 vector_threshold = MIN_MSIX_COUNT;
1880
1881 /* The more we get, the more we will assign to Tx/Rx Cleanup
1882 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1883 * Right now, we simply care about how many we'll get; we'll
1884 * set them up later while requesting irq's.
1885 */
1886 vectors = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1887 vector_threshold, vectors);
1888
1889 if (vectors < 0) {
1890 dev_err(&adapter->pdev->dev,
1891 "Unable to allocate MSI-X interrupts\n");
1892 kfree(adapter->msix_entries);
1893 adapter->msix_entries = NULL;
1894 return vectors;
1895 }
1896
1897 /* Adjust for only the vectors we'll use, which is minimum
1898 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
1899 * vectors we were allocated.
1900 */
1901 adapter->num_msix_vectors = vectors;
1902
1903 return 0;
1904}
1905
1906/**
1907 * ixgbevf_set_num_queues - Allocate queues for device, feature dependent
1908 * @adapter: board private structure to initialize
1909 *
1910 * This is the top level queue allocation routine. The order here is very
1911 * important, starting with the "most" number of features turned on at once,
1912 * and ending with the smallest set of features. This way large combinations
1913 * can be allocated if they're turned on, and smaller combinations are the
1914 * fallthrough conditions.
1915 *
1916 **/
1917static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
1918{
1919 struct ixgbe_hw *hw = &adapter->hw;
1920 unsigned int def_q = 0;
1921 unsigned int num_tcs = 0;
1922 int err;
1923
1924 /* Start with base case */
1925 adapter->num_rx_queues = 1;
1926 adapter->num_tx_queues = 1;
1927
1928 spin_lock_bh(&adapter->mbx_lock);
1929
1930 /* fetch queue configuration from the PF */
1931 err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
1932
1933 spin_unlock_bh(&adapter->mbx_lock);
1934
1935 if (err)
1936 return;
1937
1938 /* we need as many queues as traffic classes */
1939 if (num_tcs > 1)
1940 adapter->num_rx_queues = num_tcs;
1941}
1942
1943/**
1944 * ixgbevf_alloc_queues - Allocate memory for all rings
1945 * @adapter: board private structure to initialize
1946 *
1947 * We allocate one ring per queue at run-time since we don't know the
1948 * number of queues at compile-time. The polling_netdev array is
1949 * intended for Multiqueue, but should work fine with a single queue.
1950 **/
1951static int ixgbevf_alloc_queues(struct ixgbevf_adapter *adapter)
1952{
1953 struct ixgbevf_ring *ring;
1954 int rx = 0, tx = 0;
1955
1956 for (; tx < adapter->num_tx_queues; tx++) {
1957 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
1958 if (!ring)
1959 goto err_allocation;
1960
1961 ring->dev = &adapter->pdev->dev;
1962 ring->netdev = adapter->netdev;
1963 ring->count = adapter->tx_ring_count;
1964 ring->queue_index = tx;
1965 ring->reg_idx = tx;
1966
1967 adapter->tx_ring[tx] = ring;
1968 }
1969
1970 for (; rx < adapter->num_rx_queues; rx++) {
1971 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
1972 if (!ring)
1973 goto err_allocation;
1974
1975 ring->dev = &adapter->pdev->dev;
1976 ring->netdev = adapter->netdev;
1977
1978 ring->count = adapter->rx_ring_count;
1979 ring->queue_index = rx;
1980 ring->reg_idx = rx;
1981
1982 adapter->rx_ring[rx] = ring;
1983 }
1984
1985 return 0;
1986
1987err_allocation:
1988 while (tx) {
1989 kfree(adapter->tx_ring[--tx]);
1990 adapter->tx_ring[tx] = NULL;
1991 }
1992
1993 while (rx) {
1994 kfree(adapter->rx_ring[--rx]);
1995 adapter->rx_ring[rx] = NULL;
1996 }
1997 return -ENOMEM;
1998}
1999
2000/**
2001 * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
2002 * @adapter: board private structure to initialize
2003 *
2004 * Attempt to configure the interrupts using the best available
2005 * capabilities of the hardware and the kernel.
2006 **/
2007static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter)
2008{
2009 struct net_device *netdev = adapter->netdev;
2010 int err = 0;
2011 int vector, v_budget;
2012
2013 /*
2014 * It's easy to be greedy for MSI-X vectors, but it really
2015 * doesn't do us much good if we have a lot more vectors
2016 * than CPU's. So let's be conservative and only ask for
2017 * (roughly) the same number of vectors as there are CPU's.
2018 * The default is to use pairs of vectors.
2019 */
2020 v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);
2021 v_budget = min_t(int, v_budget, num_online_cpus());
2022 v_budget += NON_Q_VECTORS;
2023
2024 /* A failure in MSI-X entry allocation isn't fatal, but it does
2025 * mean we disable MSI-X capabilities of the adapter. */
2026 adapter->msix_entries = kcalloc(v_budget,
2027 sizeof(struct msix_entry), GFP_KERNEL);
2028 if (!adapter->msix_entries) {
2029 err = -ENOMEM;
2030 goto out;
2031 }
2032
2033 for (vector = 0; vector < v_budget; vector++)
2034 adapter->msix_entries[vector].entry = vector;
2035
2036 err = ixgbevf_acquire_msix_vectors(adapter, v_budget);
2037 if (err)
2038 goto out;
2039
2040 err = netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues);
2041 if (err)
2042 goto out;
2043
2044 err = netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues);
2045
2046out:
2047 return err;
2048}
2049
2050/**
2051 * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
2052 * @adapter: board private structure to initialize
2053 *
2054 * We allocate one q_vector per queue interrupt. If allocation fails we
2055 * return -ENOMEM.
2056 **/
2057static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)
2058{
2059 int q_idx, num_q_vectors;
2060 struct ixgbevf_q_vector *q_vector;
2061
2062 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2063
2064 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
2065 q_vector = kzalloc(sizeof(struct ixgbevf_q_vector), GFP_KERNEL);
2066 if (!q_vector)
2067 goto err_out;
2068 q_vector->adapter = adapter;
2069 q_vector->v_idx = q_idx;
2070 netif_napi_add(adapter->netdev, &q_vector->napi,
2071 ixgbevf_poll, 64);
2072#ifdef CONFIG_NET_RX_BUSY_POLL
2073 napi_hash_add(&q_vector->napi);
2074#endif
2075 adapter->q_vector[q_idx] = q_vector;
2076 }
2077
2078 return 0;
2079
2080err_out:
2081 while (q_idx) {
2082 q_idx--;
2083 q_vector = adapter->q_vector[q_idx];
2084#ifdef CONFIG_NET_RX_BUSY_POLL
2085 napi_hash_del(&q_vector->napi);
2086#endif
2087 netif_napi_del(&q_vector->napi);
2088 kfree(q_vector);
2089 adapter->q_vector[q_idx] = NULL;
2090 }
2091 return -ENOMEM;
2092}
2093
2094/**
2095 * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
2096 * @adapter: board private structure to initialize
2097 *
2098 * This function frees the memory allocated to the q_vectors. In addition if
2099 * NAPI is enabled it will delete any references to the NAPI struct prior
2100 * to freeing the q_vector.
2101 **/
2102static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter)
2103{
2104 int q_idx, num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2105
2106 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
2107 struct ixgbevf_q_vector *q_vector = adapter->q_vector[q_idx];
2108
2109 adapter->q_vector[q_idx] = NULL;
2110#ifdef CONFIG_NET_RX_BUSY_POLL
2111 napi_hash_del(&q_vector->napi);
2112#endif
2113 netif_napi_del(&q_vector->napi);
2114 kfree(q_vector);
2115 }
2116}
2117
2118/**
2119 * ixgbevf_reset_interrupt_capability - Reset MSIX setup
2120 * @adapter: board private structure
2121 *
2122 **/
2123static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter)
2124{
2125 pci_disable_msix(adapter->pdev);
2126 kfree(adapter->msix_entries);
2127 adapter->msix_entries = NULL;
2128}
2129
2130/**
2131 * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
2132 * @adapter: board private structure to initialize
2133 *
2134 **/
2135static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter)
2136{
2137 int err;
2138
2139 /* Number of supported queues */
2140 ixgbevf_set_num_queues(adapter);
2141
2142 err = ixgbevf_set_interrupt_capability(adapter);
2143 if (err) {
2144 hw_dbg(&adapter->hw,
2145 "Unable to setup interrupt capabilities\n");
2146 goto err_set_interrupt;
2147 }
2148
2149 err = ixgbevf_alloc_q_vectors(adapter);
2150 if (err) {
2151 hw_dbg(&adapter->hw, "Unable to allocate memory for queue "
2152 "vectors\n");
2153 goto err_alloc_q_vectors;
2154 }
2155
2156 err = ixgbevf_alloc_queues(adapter);
2157 if (err) {
2158 pr_err("Unable to allocate memory for queues\n");
2159 goto err_alloc_queues;
2160 }
2161
2162 hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, "
2163 "Tx Queue count = %u\n",
2164 (adapter->num_rx_queues > 1) ? "Enabled" :
2165 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
2166
2167 set_bit(__IXGBEVF_DOWN, &adapter->state);
2168
2169 return 0;
2170err_alloc_queues:
2171 ixgbevf_free_q_vectors(adapter);
2172err_alloc_q_vectors:
2173 ixgbevf_reset_interrupt_capability(adapter);
2174err_set_interrupt:
2175 return err;
2176}
2177
2178/**
2179 * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings
2180 * @adapter: board private structure to clear interrupt scheme on
2181 *
2182 * We go through and clear interrupt specific resources and reset the structure
2183 * to pre-load conditions
2184 **/
2185static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter)
2186{
2187 int i;
2188
2189 for (i = 0; i < adapter->num_tx_queues; i++) {
2190 kfree(adapter->tx_ring[i]);
2191 adapter->tx_ring[i] = NULL;
2192 }
2193 for (i = 0; i < adapter->num_rx_queues; i++) {
2194 kfree(adapter->rx_ring[i]);
2195 adapter->rx_ring[i] = NULL;
2196 }
2197
2198 adapter->num_tx_queues = 0;
2199 adapter->num_rx_queues = 0;
2200
2201 ixgbevf_free_q_vectors(adapter);
2202 ixgbevf_reset_interrupt_capability(adapter);
2203}
2204
2205/**
2206 * ixgbevf_sw_init - Initialize general software structures
2207 * (struct ixgbevf_adapter)
2208 * @adapter: board private structure to initialize
2209 *
2210 * ixgbevf_sw_init initializes the Adapter private data structure.
2211 * Fields are initialized based on PCI device information and
2212 * OS network device settings (MTU size).
2213 **/
2214static int ixgbevf_sw_init(struct ixgbevf_adapter *adapter)
2215{
2216 struct ixgbe_hw *hw = &adapter->hw;
2217 struct pci_dev *pdev = adapter->pdev;
2218 struct net_device *netdev = adapter->netdev;
2219 int err;
2220
2221 /* PCI config space info */
2222
2223 hw->vendor_id = pdev->vendor;
2224 hw->device_id = pdev->device;
2225 hw->revision_id = pdev->revision;
2226 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2227 hw->subsystem_device_id = pdev->subsystem_device;
2228
2229 hw->mbx.ops.init_params(hw);
2230
2231 /* assume legacy case in which PF would only give VF 2 queues */
2232 hw->mac.max_tx_queues = 2;
2233 hw->mac.max_rx_queues = 2;
2234
2235 /* lock to protect mailbox accesses */
2236 spin_lock_init(&adapter->mbx_lock);
2237
2238 err = hw->mac.ops.reset_hw(hw);
2239 if (err) {
2240 dev_info(&pdev->dev,
2241 "PF still in reset state. Is the PF interface up?\n");
2242 } else {
2243 err = hw->mac.ops.init_hw(hw);
2244 if (err) {
2245 pr_err("init_shared_code failed: %d\n", err);
2246 goto out;
2247 }
2248 ixgbevf_negotiate_api(adapter);
2249 err = hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
2250 if (err)
2251 dev_info(&pdev->dev, "Error reading MAC address\n");
2252 else if (is_zero_ether_addr(adapter->hw.mac.addr))
2253 dev_info(&pdev->dev,
2254 "MAC address not assigned by administrator.\n");
2255 memcpy(netdev->dev_addr, hw->mac.addr, netdev->addr_len);
2256 }
2257
2258 if (!is_valid_ether_addr(netdev->dev_addr)) {
2259 dev_info(&pdev->dev, "Assigning random MAC address\n");
2260 eth_hw_addr_random(netdev);
2261 memcpy(hw->mac.addr, netdev->dev_addr, netdev->addr_len);
2262 }
2263
2264 /* Enable dynamic interrupt throttling rates */
2265 adapter->rx_itr_setting = 1;
2266 adapter->tx_itr_setting = 1;
2267
2268 /* set default ring sizes */
2269 adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD;
2270 adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD;
2271
2272 set_bit(__IXGBEVF_DOWN, &adapter->state);
2273 return 0;
2274
2275out:
2276 return err;
2277}
2278
2279#define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter) \
2280 { \
2281 u32 current_counter = IXGBE_READ_REG(hw, reg); \
2282 if (current_counter < last_counter) \
2283 counter += 0x100000000LL; \
2284 last_counter = current_counter; \
2285 counter &= 0xFFFFFFFF00000000LL; \
2286 counter |= current_counter; \
2287 }
2288
2289#define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
2290 { \
2291 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb); \
2292 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb); \
2293 u64 current_counter = (current_counter_msb << 32) | \
2294 current_counter_lsb; \
2295 if (current_counter < last_counter) \
2296 counter += 0x1000000000LL; \
2297 last_counter = current_counter; \
2298 counter &= 0xFFFFFFF000000000LL; \
2299 counter |= current_counter; \
2300 }
2301/**
2302 * ixgbevf_update_stats - Update the board statistics counters.
2303 * @adapter: board private structure
2304 **/
2305void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
2306{
2307 struct ixgbe_hw *hw = &adapter->hw;
2308 int i;
2309
2310 if (!adapter->link_up)
2311 return;
2312
2313 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc,
2314 adapter->stats.vfgprc);
2315 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc,
2316 adapter->stats.vfgptc);
2317 UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB,
2318 adapter->stats.last_vfgorc,
2319 adapter->stats.vfgorc);
2320 UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB,
2321 adapter->stats.last_vfgotc,
2322 adapter->stats.vfgotc);
2323 UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
2324 adapter->stats.vfmprc);
2325
2326 for (i = 0; i < adapter->num_rx_queues; i++) {
2327 adapter->hw_csum_rx_error +=
2328 adapter->rx_ring[i]->hw_csum_rx_error;
2329 adapter->rx_ring[i]->hw_csum_rx_error = 0;
2330 }
2331}
2332
2333/**
2334 * ixgbevf_watchdog - Timer Call-back
2335 * @data: pointer to adapter cast into an unsigned long
2336 **/
2337static void ixgbevf_watchdog(unsigned long data)
2338{
2339 struct ixgbevf_adapter *adapter = (struct ixgbevf_adapter *)data;
2340 struct ixgbe_hw *hw = &adapter->hw;
2341 u32 eics = 0;
2342 int i;
2343
2344 /*
2345 * Do the watchdog outside of interrupt context due to the lovely
2346 * delays that some of the newer hardware requires
2347 */
2348
2349 if (test_bit(__IXGBEVF_DOWN, &adapter->state))
2350 goto watchdog_short_circuit;
2351
2352 /* get one bit for every active tx/rx interrupt vector */
2353 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
2354 struct ixgbevf_q_vector *qv = adapter->q_vector[i];
2355 if (qv->rx.ring || qv->tx.ring)
2356 eics |= 1 << i;
2357 }
2358
2359 IXGBE_WRITE_REG(hw, IXGBE_VTEICS, eics);
2360
2361watchdog_short_circuit:
2362 schedule_work(&adapter->watchdog_task);
2363}
2364
2365/**
2366 * ixgbevf_tx_timeout - Respond to a Tx Hang
2367 * @netdev: network interface device structure
2368 **/
2369static void ixgbevf_tx_timeout(struct net_device *netdev)
2370{
2371 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2372
2373 /* Do the reset outside of interrupt context */
2374 schedule_work(&adapter->reset_task);
2375}
2376
2377static void ixgbevf_reset_task(struct work_struct *work)
2378{
2379 struct ixgbevf_adapter *adapter;
2380 adapter = container_of(work, struct ixgbevf_adapter, reset_task);
2381
2382 /* If we're already down or resetting, just bail */
2383 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
2384 test_bit(__IXGBEVF_REMOVING, &adapter->state) ||
2385 test_bit(__IXGBEVF_RESETTING, &adapter->state))
2386 return;
2387
2388 adapter->tx_timeout_count++;
2389
2390 ixgbevf_reinit_locked(adapter);
2391}
2392
2393/**
2394 * ixgbevf_watchdog_task - worker thread to bring link up
2395 * @work: pointer to work_struct containing our data
2396 **/
2397static void ixgbevf_watchdog_task(struct work_struct *work)
2398{
2399 struct ixgbevf_adapter *adapter = container_of(work,
2400 struct ixgbevf_adapter,
2401 watchdog_task);
2402 struct net_device *netdev = adapter->netdev;
2403 struct ixgbe_hw *hw = &adapter->hw;
2404 u32 link_speed = adapter->link_speed;
2405 bool link_up = adapter->link_up;
2406 s32 need_reset;
2407
2408 if (IXGBE_REMOVED(hw->hw_addr)) {
2409 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) {
2410 rtnl_lock();
2411 ixgbevf_down(adapter);
2412 rtnl_unlock();
2413 }
2414 return;
2415 }
2416 ixgbevf_queue_reset_subtask(adapter);
2417
2418 adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
2419
2420 /*
2421 * Always check the link on the watchdog because we have
2422 * no LSC interrupt
2423 */
2424 spin_lock_bh(&adapter->mbx_lock);
2425
2426 need_reset = hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
2427
2428 spin_unlock_bh(&adapter->mbx_lock);
2429
2430 if (need_reset) {
2431 adapter->link_up = link_up;
2432 adapter->link_speed = link_speed;
2433 netif_carrier_off(netdev);
2434 netif_tx_stop_all_queues(netdev);
2435 schedule_work(&adapter->reset_task);
2436 goto pf_has_reset;
2437 }
2438 adapter->link_up = link_up;
2439 adapter->link_speed = link_speed;
2440
2441 if (link_up) {
2442 if (!netif_carrier_ok(netdev)) {
2443 char *link_speed_string;
2444 switch (link_speed) {
2445 case IXGBE_LINK_SPEED_10GB_FULL:
2446 link_speed_string = "10 Gbps";
2447 break;
2448 case IXGBE_LINK_SPEED_1GB_FULL:
2449 link_speed_string = "1 Gbps";
2450 break;
2451 case IXGBE_LINK_SPEED_100_FULL:
2452 link_speed_string = "100 Mbps";
2453 break;
2454 default:
2455 link_speed_string = "unknown speed";
2456 break;
2457 }
2458 dev_info(&adapter->pdev->dev,
2459 "NIC Link is Up, %s\n", link_speed_string);
2460 netif_carrier_on(netdev);
2461 netif_tx_wake_all_queues(netdev);
2462 }
2463 } else {
2464 adapter->link_up = false;
2465 adapter->link_speed = 0;
2466 if (netif_carrier_ok(netdev)) {
2467 dev_info(&adapter->pdev->dev, "NIC Link is Down\n");
2468 netif_carrier_off(netdev);
2469 netif_tx_stop_all_queues(netdev);
2470 }
2471 }
2472
2473 ixgbevf_update_stats(adapter);
2474
2475pf_has_reset:
2476 /* Reset the timer */
2477 if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&
2478 !test_bit(__IXGBEVF_REMOVING, &adapter->state))
2479 mod_timer(&adapter->watchdog_timer,
2480 round_jiffies(jiffies + (2 * HZ)));
2481
2482 adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
2483}
2484
2485/**
2486 * ixgbevf_free_tx_resources - Free Tx Resources per Queue
2487 * @tx_ring: Tx descriptor ring for a specific queue
2488 *
2489 * Free all transmit software resources
2490 **/
2491void ixgbevf_free_tx_resources(struct ixgbevf_ring *tx_ring)
2492{
2493 ixgbevf_clean_tx_ring(tx_ring);
2494
2495 vfree(tx_ring->tx_buffer_info);
2496 tx_ring->tx_buffer_info = NULL;
2497
2498 /* if not set, then don't free */
2499 if (!tx_ring->desc)
2500 return;
2501
2502 dma_free_coherent(tx_ring->dev, tx_ring->size, tx_ring->desc,
2503 tx_ring->dma);
2504
2505 tx_ring->desc = NULL;
2506}
2507
2508/**
2509 * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
2510 * @adapter: board private structure
2511 *
2512 * Free all transmit software resources
2513 **/
2514static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter)
2515{
2516 int i;
2517
2518 for (i = 0; i < adapter->num_tx_queues; i++)
2519 if (adapter->tx_ring[i]->desc)
2520 ixgbevf_free_tx_resources(adapter->tx_ring[i]);
2521}
2522
2523/**
2524 * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
2525 * @tx_ring: tx descriptor ring (for a specific queue) to setup
2526 *
2527 * Return 0 on success, negative on failure
2528 **/
2529int ixgbevf_setup_tx_resources(struct ixgbevf_ring *tx_ring)
2530{
2531 int size;
2532
2533 size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
2534 tx_ring->tx_buffer_info = vzalloc(size);
2535 if (!tx_ring->tx_buffer_info)
2536 goto err;
2537
2538 /* round up to nearest 4K */
2539 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
2540 tx_ring->size = ALIGN(tx_ring->size, 4096);
2541
2542 tx_ring->desc = dma_alloc_coherent(tx_ring->dev, tx_ring->size,
2543 &tx_ring->dma, GFP_KERNEL);
2544 if (!tx_ring->desc)
2545 goto err;
2546
2547 return 0;
2548
2549err:
2550 vfree(tx_ring->tx_buffer_info);
2551 tx_ring->tx_buffer_info = NULL;
2552 hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit "
2553 "descriptor ring\n");
2554 return -ENOMEM;
2555}
2556
2557/**
2558 * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
2559 * @adapter: board private structure
2560 *
2561 * If this function returns with an error, then it's possible one or
2562 * more of the rings is populated (while the rest are not). It is the
2563 * callers duty to clean those orphaned rings.
2564 *
2565 * Return 0 on success, negative on failure
2566 **/
2567static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)
2568{
2569 int i, err = 0;
2570
2571 for (i = 0; i < adapter->num_tx_queues; i++) {
2572 err = ixgbevf_setup_tx_resources(adapter->tx_ring[i]);
2573 if (!err)
2574 continue;
2575 hw_dbg(&adapter->hw,
2576 "Allocation for Tx Queue %u failed\n", i);
2577 break;
2578 }
2579
2580 return err;
2581}
2582
2583/**
2584 * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
2585 * @rx_ring: rx descriptor ring (for a specific queue) to setup
2586 *
2587 * Returns 0 on success, negative on failure
2588 **/
2589int ixgbevf_setup_rx_resources(struct ixgbevf_ring *rx_ring)
2590{
2591 int size;
2592
2593 size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
2594 rx_ring->rx_buffer_info = vzalloc(size);
2595 if (!rx_ring->rx_buffer_info)
2596 goto err;
2597
2598 /* Round up to nearest 4K */
2599 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
2600 rx_ring->size = ALIGN(rx_ring->size, 4096);
2601
2602 rx_ring->desc = dma_alloc_coherent(rx_ring->dev, rx_ring->size,
2603 &rx_ring->dma, GFP_KERNEL);
2604
2605 if (!rx_ring->desc)
2606 goto err;
2607
2608 return 0;
2609err:
2610 vfree(rx_ring->rx_buffer_info);
2611 rx_ring->rx_buffer_info = NULL;
2612 dev_err(rx_ring->dev, "Unable to allocate memory for the Rx descriptor ring\n");
2613 return -ENOMEM;
2614}
2615
2616/**
2617 * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
2618 * @adapter: board private structure
2619 *
2620 * If this function returns with an error, then it's possible one or
2621 * more of the rings is populated (while the rest are not). It is the
2622 * callers duty to clean those orphaned rings.
2623 *
2624 * Return 0 on success, negative on failure
2625 **/
2626static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter)
2627{
2628 int i, err = 0;
2629
2630 for (i = 0; i < adapter->num_rx_queues; i++) {
2631 err = ixgbevf_setup_rx_resources(adapter->rx_ring[i]);
2632 if (!err)
2633 continue;
2634 hw_dbg(&adapter->hw,
2635 "Allocation for Rx Queue %u failed\n", i);
2636 break;
2637 }
2638 return err;
2639}
2640
2641/**
2642 * ixgbevf_free_rx_resources - Free Rx Resources
2643 * @rx_ring: ring to clean the resources from
2644 *
2645 * Free all receive software resources
2646 **/
2647void ixgbevf_free_rx_resources(struct ixgbevf_ring *rx_ring)
2648{
2649 ixgbevf_clean_rx_ring(rx_ring);
2650
2651 vfree(rx_ring->rx_buffer_info);
2652 rx_ring->rx_buffer_info = NULL;
2653
2654 dma_free_coherent(rx_ring->dev, rx_ring->size, rx_ring->desc,
2655 rx_ring->dma);
2656
2657 rx_ring->desc = NULL;
2658}
2659
2660/**
2661 * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
2662 * @adapter: board private structure
2663 *
2664 * Free all receive software resources
2665 **/
2666static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter)
2667{
2668 int i;
2669
2670 for (i = 0; i < adapter->num_rx_queues; i++)
2671 if (adapter->rx_ring[i]->desc)
2672 ixgbevf_free_rx_resources(adapter->rx_ring[i]);
2673}
2674
2675/**
2676 * ixgbevf_open - Called when a network interface is made active
2677 * @netdev: network interface device structure
2678 *
2679 * Returns 0 on success, negative value on failure
2680 *
2681 * The open entry point is called when a network interface is made
2682 * active by the system (IFF_UP). At this point all resources needed
2683 * for transmit and receive operations are allocated, the interrupt
2684 * handler is registered with the OS, the watchdog timer is started,
2685 * and the stack is notified that the interface is ready.
2686 **/
2687static int ixgbevf_open(struct net_device *netdev)
2688{
2689 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2690 struct ixgbe_hw *hw = &adapter->hw;
2691 int err;
2692
2693 /* A previous failure to open the device because of a lack of
2694 * available MSIX vector resources may have reset the number
2695 * of msix vectors variable to zero. The only way to recover
2696 * is to unload/reload the driver and hope that the system has
2697 * been able to recover some MSIX vector resources.
2698 */
2699 if (!adapter->num_msix_vectors)
2700 return -ENOMEM;
2701
2702 /* disallow open during test */
2703 if (test_bit(__IXGBEVF_TESTING, &adapter->state))
2704 return -EBUSY;
2705
2706 if (hw->adapter_stopped) {
2707 ixgbevf_reset(adapter);
2708 /* if adapter is still stopped then PF isn't up and
2709 * the vf can't start. */
2710 if (hw->adapter_stopped) {
2711 err = IXGBE_ERR_MBX;
2712 pr_err("Unable to start - perhaps the PF Driver isn't "
2713 "up yet\n");
2714 goto err_setup_reset;
2715 }
2716 }
2717
2718 /* allocate transmit descriptors */
2719 err = ixgbevf_setup_all_tx_resources(adapter);
2720 if (err)
2721 goto err_setup_tx;
2722
2723 /* allocate receive descriptors */
2724 err = ixgbevf_setup_all_rx_resources(adapter);
2725 if (err)
2726 goto err_setup_rx;
2727
2728 ixgbevf_configure(adapter);
2729
2730 /*
2731 * Map the Tx/Rx rings to the vectors we were allotted.
2732 * if request_irq will be called in this function map_rings
2733 * must be called *before* up_complete
2734 */
2735 ixgbevf_map_rings_to_vectors(adapter);
2736
2737 ixgbevf_up_complete(adapter);
2738
2739 /* clear any pending interrupts, may auto mask */
2740 IXGBE_READ_REG(hw, IXGBE_VTEICR);
2741 err = ixgbevf_request_irq(adapter);
2742 if (err)
2743 goto err_req_irq;
2744
2745 ixgbevf_irq_enable(adapter);
2746
2747 return 0;
2748
2749err_req_irq:
2750 ixgbevf_down(adapter);
2751err_setup_rx:
2752 ixgbevf_free_all_rx_resources(adapter);
2753err_setup_tx:
2754 ixgbevf_free_all_tx_resources(adapter);
2755 ixgbevf_reset(adapter);
2756
2757err_setup_reset:
2758
2759 return err;
2760}
2761
2762/**
2763 * ixgbevf_close - Disables a network interface
2764 * @netdev: network interface device structure
2765 *
2766 * Returns 0, this is not allowed to fail
2767 *
2768 * The close entry point is called when an interface is de-activated
2769 * by the OS. The hardware is still under the drivers control, but
2770 * needs to be disabled. A global MAC reset is issued to stop the
2771 * hardware, and all transmit and receive resources are freed.
2772 **/
2773static int ixgbevf_close(struct net_device *netdev)
2774{
2775 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2776
2777 ixgbevf_down(adapter);
2778 ixgbevf_free_irq(adapter);
2779
2780 ixgbevf_free_all_tx_resources(adapter);
2781 ixgbevf_free_all_rx_resources(adapter);
2782
2783 return 0;
2784}
2785
2786static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter)
2787{
2788 struct net_device *dev = adapter->netdev;
2789
2790 if (!(adapter->flags & IXGBEVF_FLAG_QUEUE_RESET_REQUESTED))
2791 return;
2792
2793 adapter->flags &= ~IXGBEVF_FLAG_QUEUE_RESET_REQUESTED;
2794
2795 /* if interface is down do nothing */
2796 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
2797 test_bit(__IXGBEVF_RESETTING, &adapter->state))
2798 return;
2799
2800 /* Hardware has to reinitialize queues and interrupts to
2801 * match packet buffer alignment. Unfortunately, the
2802 * hardware is not flexible enough to do this dynamically.
2803 */
2804 if (netif_running(dev))
2805 ixgbevf_close(dev);
2806
2807 ixgbevf_clear_interrupt_scheme(adapter);
2808 ixgbevf_init_interrupt_scheme(adapter);
2809
2810 if (netif_running(dev))
2811 ixgbevf_open(dev);
2812}
2813
2814static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring *tx_ring,
2815 u32 vlan_macip_lens, u32 type_tucmd,
2816 u32 mss_l4len_idx)
2817{
2818 struct ixgbe_adv_tx_context_desc *context_desc;
2819 u16 i = tx_ring->next_to_use;
2820
2821 context_desc = IXGBEVF_TX_CTXTDESC(tx_ring, i);
2822
2823 i++;
2824 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
2825
2826 /* set bits to identify this as an advanced context descriptor */
2827 type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT;
2828
2829 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
2830 context_desc->seqnum_seed = 0;
2831 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd);
2832 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
2833}
2834
2835static int ixgbevf_tso(struct ixgbevf_ring *tx_ring,
2836 struct ixgbevf_tx_buffer *first,
2837 u8 *hdr_len)
2838{
2839 struct sk_buff *skb = first->skb;
2840 u32 vlan_macip_lens, type_tucmd;
2841 u32 mss_l4len_idx, l4len;
2842 int err;
2843
2844 if (skb->ip_summed != CHECKSUM_PARTIAL)
2845 return 0;
2846
2847 if (!skb_is_gso(skb))
2848 return 0;
2849
2850 err = skb_cow_head(skb, 0);
2851 if (err < 0)
2852 return err;
2853
2854 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2855 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
2856
2857 if (skb->protocol == htons(ETH_P_IP)) {
2858 struct iphdr *iph = ip_hdr(skb);
2859 iph->tot_len = 0;
2860 iph->check = 0;
2861 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2862 iph->daddr, 0,
2863 IPPROTO_TCP,
2864 0);
2865 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
2866 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
2867 IXGBE_TX_FLAGS_CSUM |
2868 IXGBE_TX_FLAGS_IPV4;
2869 } else if (skb_is_gso_v6(skb)) {
2870 ipv6_hdr(skb)->payload_len = 0;
2871 tcp_hdr(skb)->check =
2872 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2873 &ipv6_hdr(skb)->daddr,
2874 0, IPPROTO_TCP, 0);
2875 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
2876 IXGBE_TX_FLAGS_CSUM;
2877 }
2878
2879 /* compute header lengths */
2880 l4len = tcp_hdrlen(skb);
2881 *hdr_len += l4len;
2882 *hdr_len = skb_transport_offset(skb) + l4len;
2883
2884 /* update gso size and bytecount with header size */
2885 first->gso_segs = skb_shinfo(skb)->gso_segs;
2886 first->bytecount += (first->gso_segs - 1) * *hdr_len;
2887
2888 /* mss_l4len_id: use 1 as index for TSO */
2889 mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT;
2890 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
2891 mss_l4len_idx |= 1 << IXGBE_ADVTXD_IDX_SHIFT;
2892
2893 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
2894 vlan_macip_lens = skb_network_header_len(skb);
2895 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
2896 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
2897
2898 ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
2899 type_tucmd, mss_l4len_idx);
2900
2901 return 1;
2902}
2903
2904static void ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring,
2905 struct ixgbevf_tx_buffer *first)
2906{
2907 struct sk_buff *skb = first->skb;
2908 u32 vlan_macip_lens = 0;
2909 u32 mss_l4len_idx = 0;
2910 u32 type_tucmd = 0;
2911
2912 if (skb->ip_summed == CHECKSUM_PARTIAL) {
2913 u8 l4_hdr = 0;
2914 switch (skb->protocol) {
2915 case htons(ETH_P_IP):
2916 vlan_macip_lens |= skb_network_header_len(skb);
2917 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
2918 l4_hdr = ip_hdr(skb)->protocol;
2919 break;
2920 case htons(ETH_P_IPV6):
2921 vlan_macip_lens |= skb_network_header_len(skb);
2922 l4_hdr = ipv6_hdr(skb)->nexthdr;
2923 break;
2924 default:
2925 if (unlikely(net_ratelimit())) {
2926 dev_warn(tx_ring->dev,
2927 "partial checksum but proto=%x!\n",
2928 first->protocol);
2929 }
2930 break;
2931 }
2932
2933 switch (l4_hdr) {
2934 case IPPROTO_TCP:
2935 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
2936 mss_l4len_idx = tcp_hdrlen(skb) <<
2937 IXGBE_ADVTXD_L4LEN_SHIFT;
2938 break;
2939 case IPPROTO_SCTP:
2940 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
2941 mss_l4len_idx = sizeof(struct sctphdr) <<
2942 IXGBE_ADVTXD_L4LEN_SHIFT;
2943 break;
2944 case IPPROTO_UDP:
2945 mss_l4len_idx = sizeof(struct udphdr) <<
2946 IXGBE_ADVTXD_L4LEN_SHIFT;
2947 break;
2948 default:
2949 if (unlikely(net_ratelimit())) {
2950 dev_warn(tx_ring->dev,
2951 "partial checksum but l4 proto=%x!\n",
2952 l4_hdr);
2953 }
2954 break;
2955 }
2956
2957 /* update TX checksum flag */
2958 first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
2959 }
2960
2961 /* vlan_macip_lens: MACLEN, VLAN tag */
2962 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
2963 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
2964
2965 ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
2966 type_tucmd, mss_l4len_idx);
2967}
2968
2969static __le32 ixgbevf_tx_cmd_type(u32 tx_flags)
2970{
2971 /* set type for advanced descriptor with frame checksum insertion */
2972 __le32 cmd_type = cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA |
2973 IXGBE_ADVTXD_DCMD_IFCS |
2974 IXGBE_ADVTXD_DCMD_DEXT);
2975
2976 /* set HW vlan bit if vlan is present */
2977 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2978 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE);
2979
2980 /* set segmentation enable bits for TSO/FSO */
2981 if (tx_flags & IXGBE_TX_FLAGS_TSO)
2982 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE);
2983
2984 return cmd_type;
2985}
2986
2987static void ixgbevf_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
2988 u32 tx_flags, unsigned int paylen)
2989{
2990 __le32 olinfo_status = cpu_to_le32(paylen << IXGBE_ADVTXD_PAYLEN_SHIFT);
2991
2992 /* enable L4 checksum for TSO and TX checksum offload */
2993 if (tx_flags & IXGBE_TX_FLAGS_CSUM)
2994 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM);
2995
2996 /* enble IPv4 checksum for TSO */
2997 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
2998 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IXSM);
2999
3000 /* use index 1 context for TSO/FSO/FCOE */
3001 if (tx_flags & IXGBE_TX_FLAGS_TSO)
3002 olinfo_status |= cpu_to_le32(1 << IXGBE_ADVTXD_IDX_SHIFT);
3003
3004 /* Check Context must be set if Tx switch is enabled, which it
3005 * always is for case where virtual functions are running
3006 */
3007 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_CC);
3008
3009 tx_desc->read.olinfo_status = olinfo_status;
3010}
3011
3012static void ixgbevf_tx_map(struct ixgbevf_ring *tx_ring,
3013 struct ixgbevf_tx_buffer *first,
3014 const u8 hdr_len)
3015{
3016 dma_addr_t dma;
3017 struct sk_buff *skb = first->skb;
3018 struct ixgbevf_tx_buffer *tx_buffer;
3019 union ixgbe_adv_tx_desc *tx_desc;
3020 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
3021 unsigned int data_len = skb->data_len;
3022 unsigned int size = skb_headlen(skb);
3023 unsigned int paylen = skb->len - hdr_len;
3024 u32 tx_flags = first->tx_flags;
3025 __le32 cmd_type;
3026 u16 i = tx_ring->next_to_use;
3027
3028 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
3029
3030 ixgbevf_tx_olinfo_status(tx_desc, tx_flags, paylen);
3031 cmd_type = ixgbevf_tx_cmd_type(tx_flags);
3032
3033 dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);
3034 if (dma_mapping_error(tx_ring->dev, dma))
3035 goto dma_error;
3036
3037 /* record length, and DMA address */
3038 dma_unmap_len_set(first, len, size);
3039 dma_unmap_addr_set(first, dma, dma);
3040
3041 tx_desc->read.buffer_addr = cpu_to_le64(dma);
3042
3043 for (;;) {
3044 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {
3045 tx_desc->read.cmd_type_len =
3046 cmd_type | cpu_to_le32(IXGBE_MAX_DATA_PER_TXD);
3047
3048 i++;
3049 tx_desc++;
3050 if (i == tx_ring->count) {
3051 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
3052 i = 0;
3053 }
3054
3055 dma += IXGBE_MAX_DATA_PER_TXD;
3056 size -= IXGBE_MAX_DATA_PER_TXD;
3057
3058 tx_desc->read.buffer_addr = cpu_to_le64(dma);
3059 tx_desc->read.olinfo_status = 0;
3060 }
3061
3062 if (likely(!data_len))
3063 break;
3064
3065 tx_desc->read.cmd_type_len = cmd_type | cpu_to_le32(size);
3066
3067 i++;
3068 tx_desc++;
3069 if (i == tx_ring->count) {
3070 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
3071 i = 0;
3072 }
3073
3074 size = skb_frag_size(frag);
3075 data_len -= size;
3076
3077 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,
3078 DMA_TO_DEVICE);
3079 if (dma_mapping_error(tx_ring->dev, dma))
3080 goto dma_error;
3081
3082 tx_buffer = &tx_ring->tx_buffer_info[i];
3083 dma_unmap_len_set(tx_buffer, len, size);
3084 dma_unmap_addr_set(tx_buffer, dma, dma);
3085
3086 tx_desc->read.buffer_addr = cpu_to_le64(dma);
3087 tx_desc->read.olinfo_status = 0;
3088
3089 frag++;
3090 }
3091
3092 /* write last descriptor with RS and EOP bits */
3093 cmd_type |= cpu_to_le32(size) | cpu_to_le32(IXGBE_TXD_CMD);
3094 tx_desc->read.cmd_type_len = cmd_type;
3095
3096 /* set the timestamp */
3097 first->time_stamp = jiffies;
3098
3099 /* Force memory writes to complete before letting h/w know there
3100 * are new descriptors to fetch. (Only applicable for weak-ordered
3101 * memory model archs, such as IA-64).
3102 *
3103 * We also need this memory barrier (wmb) to make certain all of the
3104 * status bits have been updated before next_to_watch is written.
3105 */
3106 wmb();
3107
3108 /* set next_to_watch value indicating a packet is present */
3109 first->next_to_watch = tx_desc;
3110
3111 i++;
3112 if (i == tx_ring->count)
3113 i = 0;
3114
3115 tx_ring->next_to_use = i;
3116
3117 /* notify HW of packet */
3118 ixgbevf_write_tail(tx_ring, i);
3119
3120 return;
3121dma_error:
3122 dev_err(tx_ring->dev, "TX DMA map failed\n");
3123
3124 /* clear dma mappings for failed tx_buffer_info map */
3125 for (;;) {
3126 tx_buffer = &tx_ring->tx_buffer_info[i];
3127 ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer);
3128 if (tx_buffer == first)
3129 break;
3130 if (i == 0)
3131 i = tx_ring->count;
3132 i--;
3133 }
3134
3135 tx_ring->next_to_use = i;
3136}
3137
3138static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
3139{
3140 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
3141 /* Herbert's original patch had:
3142 * smp_mb__after_netif_stop_queue();
3143 * but since that doesn't exist yet, just open code it. */
3144 smp_mb();
3145
3146 /* We need to check again in a case another CPU has just
3147 * made room available. */
3148 if (likely(ixgbevf_desc_unused(tx_ring) < size))
3149 return -EBUSY;
3150
3151 /* A reprieve! - use start_queue because it doesn't call schedule */
3152 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
3153 ++tx_ring->tx_stats.restart_queue;
3154
3155 return 0;
3156}
3157
3158static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
3159{
3160 if (likely(ixgbevf_desc_unused(tx_ring) >= size))
3161 return 0;
3162 return __ixgbevf_maybe_stop_tx(tx_ring, size);
3163}
3164
3165static int ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3166{
3167 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3168 struct ixgbevf_tx_buffer *first;
3169 struct ixgbevf_ring *tx_ring;
3170 int tso;
3171 u32 tx_flags = 0;
3172 u16 count = TXD_USE_COUNT(skb_headlen(skb));
3173#if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3174 unsigned short f;
3175#endif
3176 u8 hdr_len = 0;
3177 u8 *dst_mac = skb_header_pointer(skb, 0, 0, NULL);
3178
3179 if (!dst_mac || is_link_local_ether_addr(dst_mac)) {
3180 dev_kfree_skb(skb);
3181 return NETDEV_TX_OK;
3182 }
3183
3184 tx_ring = adapter->tx_ring[skb->queue_mapping];
3185
3186 /*
3187 * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
3188 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
3189 * + 2 desc gap to keep tail from touching head,
3190 * + 1 desc for context descriptor,
3191 * otherwise try next time
3192 */
3193#if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3194 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
3195 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
3196#else
3197 count += skb_shinfo(skb)->nr_frags;
3198#endif
3199 if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) {
3200 tx_ring->tx_stats.tx_busy++;
3201 return NETDEV_TX_BUSY;
3202 }
3203
3204 /* record the location of the first descriptor for this packet */
3205 first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
3206 first->skb = skb;
3207 first->bytecount = skb->len;
3208 first->gso_segs = 1;
3209
3210 if (vlan_tx_tag_present(skb)) {
3211 tx_flags |= vlan_tx_tag_get(skb);
3212 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
3213 tx_flags |= IXGBE_TX_FLAGS_VLAN;
3214 }
3215
3216 /* record initial flags and protocol */
3217 first->tx_flags = tx_flags;
3218 first->protocol = vlan_get_protocol(skb);
3219
3220 tso = ixgbevf_tso(tx_ring, first, &hdr_len);
3221 if (tso < 0)
3222 goto out_drop;
3223 else if (!tso)
3224 ixgbevf_tx_csum(tx_ring, first);
3225
3226 ixgbevf_tx_map(tx_ring, first, hdr_len);
3227
3228 ixgbevf_maybe_stop_tx(tx_ring, DESC_NEEDED);
3229
3230 return NETDEV_TX_OK;
3231
3232out_drop:
3233 dev_kfree_skb_any(first->skb);
3234 first->skb = NULL;
3235
3236 return NETDEV_TX_OK;
3237}
3238
3239/**
3240 * ixgbevf_set_mac - Change the Ethernet Address of the NIC
3241 * @netdev: network interface device structure
3242 * @p: pointer to an address structure
3243 *
3244 * Returns 0 on success, negative on failure
3245 **/
3246static int ixgbevf_set_mac(struct net_device *netdev, void *p)
3247{
3248 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3249 struct ixgbe_hw *hw = &adapter->hw;
3250 struct sockaddr *addr = p;
3251
3252 if (!is_valid_ether_addr(addr->sa_data))
3253 return -EADDRNOTAVAIL;
3254
3255 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
3256 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
3257
3258 spin_lock_bh(&adapter->mbx_lock);
3259
3260 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
3261
3262 spin_unlock_bh(&adapter->mbx_lock);
3263
3264 return 0;
3265}
3266
3267/**
3268 * ixgbevf_change_mtu - Change the Maximum Transfer Unit
3269 * @netdev: network interface device structure
3270 * @new_mtu: new value for maximum frame size
3271 *
3272 * Returns 0 on success, negative on failure
3273 **/
3274static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
3275{
3276 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3277 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
3278 int max_possible_frame = MAXIMUM_ETHERNET_VLAN_SIZE;
3279
3280 switch (adapter->hw.api_version) {
3281 case ixgbe_mbox_api_11:
3282 max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE;
3283 break;
3284 default:
3285 if (adapter->hw.mac.type == ixgbe_mac_X540_vf)
3286 max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE;
3287 break;
3288 }
3289
3290 /* MTU < 68 is an error and causes problems on some kernels */
3291 if ((new_mtu < 68) || (max_frame > max_possible_frame))
3292 return -EINVAL;
3293
3294 hw_dbg(&adapter->hw, "changing MTU from %d to %d\n",
3295 netdev->mtu, new_mtu);
3296 /* must set new MTU before calling down or up */
3297 netdev->mtu = new_mtu;
3298
3299 if (netif_running(netdev))
3300 ixgbevf_reinit_locked(adapter);
3301
3302 return 0;
3303}
3304
3305static int ixgbevf_suspend(struct pci_dev *pdev, pm_message_t state)
3306{
3307 struct net_device *netdev = pci_get_drvdata(pdev);
3308 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3309#ifdef CONFIG_PM
3310 int retval = 0;
3311#endif
3312
3313 netif_device_detach(netdev);
3314
3315 if (netif_running(netdev)) {
3316 rtnl_lock();
3317 ixgbevf_down(adapter);
3318 ixgbevf_free_irq(adapter);
3319 ixgbevf_free_all_tx_resources(adapter);
3320 ixgbevf_free_all_rx_resources(adapter);
3321 rtnl_unlock();
3322 }
3323
3324 ixgbevf_clear_interrupt_scheme(adapter);
3325
3326#ifdef CONFIG_PM
3327 retval = pci_save_state(pdev);
3328 if (retval)
3329 return retval;
3330
3331#endif
3332 if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state))
3333 pci_disable_device(pdev);
3334
3335 return 0;
3336}
3337
3338#ifdef CONFIG_PM
3339static int ixgbevf_resume(struct pci_dev *pdev)
3340{
3341 struct net_device *netdev = pci_get_drvdata(pdev);
3342 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3343 u32 err;
3344
3345 pci_restore_state(pdev);
3346 /*
3347 * pci_restore_state clears dev->state_saved so call
3348 * pci_save_state to restore it.
3349 */
3350 pci_save_state(pdev);
3351
3352 err = pci_enable_device_mem(pdev);
3353 if (err) {
3354 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
3355 return err;
3356 }
3357 smp_mb__before_clear_bit();
3358 clear_bit(__IXGBEVF_DISABLED, &adapter->state);
3359 pci_set_master(pdev);
3360
3361 ixgbevf_reset(adapter);
3362
3363 rtnl_lock();
3364 err = ixgbevf_init_interrupt_scheme(adapter);
3365 rtnl_unlock();
3366 if (err) {
3367 dev_err(&pdev->dev, "Cannot initialize interrupts\n");
3368 return err;
3369 }
3370
3371 if (netif_running(netdev)) {
3372 err = ixgbevf_open(netdev);
3373 if (err)
3374 return err;
3375 }
3376
3377 netif_device_attach(netdev);
3378
3379 return err;
3380}
3381
3382#endif /* CONFIG_PM */
3383static void ixgbevf_shutdown(struct pci_dev *pdev)
3384{
3385 ixgbevf_suspend(pdev, PMSG_SUSPEND);
3386}
3387
3388static struct rtnl_link_stats64 *ixgbevf_get_stats(struct net_device *netdev,
3389 struct rtnl_link_stats64 *stats)
3390{
3391 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3392 unsigned int start;
3393 u64 bytes, packets;
3394 const struct ixgbevf_ring *ring;
3395 int i;
3396
3397 ixgbevf_update_stats(adapter);
3398
3399 stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc;
3400
3401 for (i = 0; i < adapter->num_rx_queues; i++) {
3402 ring = adapter->rx_ring[i];
3403 do {
3404 start = u64_stats_fetch_begin_irq(&ring->syncp);
3405 bytes = ring->stats.bytes;
3406 packets = ring->stats.packets;
3407 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
3408 stats->rx_bytes += bytes;
3409 stats->rx_packets += packets;
3410 }
3411
3412 for (i = 0; i < adapter->num_tx_queues; i++) {
3413 ring = adapter->tx_ring[i];
3414 do {
3415 start = u64_stats_fetch_begin_irq(&ring->syncp);
3416 bytes = ring->stats.bytes;
3417 packets = ring->stats.packets;
3418 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
3419 stats->tx_bytes += bytes;
3420 stats->tx_packets += packets;
3421 }
3422
3423 return stats;
3424}
3425
3426static const struct net_device_ops ixgbevf_netdev_ops = {
3427 .ndo_open = ixgbevf_open,
3428 .ndo_stop = ixgbevf_close,
3429 .ndo_start_xmit = ixgbevf_xmit_frame,
3430 .ndo_set_rx_mode = ixgbevf_set_rx_mode,
3431 .ndo_get_stats64 = ixgbevf_get_stats,
3432 .ndo_validate_addr = eth_validate_addr,
3433 .ndo_set_mac_address = ixgbevf_set_mac,
3434 .ndo_change_mtu = ixgbevf_change_mtu,
3435 .ndo_tx_timeout = ixgbevf_tx_timeout,
3436 .ndo_vlan_rx_add_vid = ixgbevf_vlan_rx_add_vid,
3437 .ndo_vlan_rx_kill_vid = ixgbevf_vlan_rx_kill_vid,
3438#ifdef CONFIG_NET_RX_BUSY_POLL
3439 .ndo_busy_poll = ixgbevf_busy_poll_recv,
3440#endif
3441};
3442
3443static void ixgbevf_assign_netdev_ops(struct net_device *dev)
3444{
3445 dev->netdev_ops = &ixgbevf_netdev_ops;
3446 ixgbevf_set_ethtool_ops(dev);
3447 dev->watchdog_timeo = 5 * HZ;
3448}
3449
3450/**
3451 * ixgbevf_probe - Device Initialization Routine
3452 * @pdev: PCI device information struct
3453 * @ent: entry in ixgbevf_pci_tbl
3454 *
3455 * Returns 0 on success, negative on failure
3456 *
3457 * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
3458 * The OS initialization, configuring of the adapter private structure,
3459 * and a hardware reset occur.
3460 **/
3461static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3462{
3463 struct net_device *netdev;
3464 struct ixgbevf_adapter *adapter = NULL;
3465 struct ixgbe_hw *hw = NULL;
3466 const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
3467 static int cards_found;
3468 int err, pci_using_dac;
3469
3470 err = pci_enable_device(pdev);
3471 if (err)
3472 return err;
3473
3474 if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
3475 pci_using_dac = 1;
3476 } else {
3477 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
3478 if (err) {
3479 dev_err(&pdev->dev, "No usable DMA "
3480 "configuration, aborting\n");
3481 goto err_dma;
3482 }
3483 pci_using_dac = 0;
3484 }
3485
3486 err = pci_request_regions(pdev, ixgbevf_driver_name);
3487 if (err) {
3488 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
3489 goto err_pci_reg;
3490 }
3491
3492 pci_set_master(pdev);
3493
3494 netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),
3495 MAX_TX_QUEUES);
3496 if (!netdev) {
3497 err = -ENOMEM;
3498 goto err_alloc_etherdev;
3499 }
3500
3501 SET_NETDEV_DEV(netdev, &pdev->dev);
3502
3503 pci_set_drvdata(pdev, netdev);
3504 adapter = netdev_priv(netdev);
3505
3506 adapter->netdev = netdev;
3507 adapter->pdev = pdev;
3508 hw = &adapter->hw;
3509 hw->back = adapter;
3510 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
3511
3512 /*
3513 * call save state here in standalone driver because it relies on
3514 * adapter struct to exist, and needs to call netdev_priv
3515 */
3516 pci_save_state(pdev);
3517
3518 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
3519 pci_resource_len(pdev, 0));
3520 adapter->io_addr = hw->hw_addr;
3521 if (!hw->hw_addr) {
3522 err = -EIO;
3523 goto err_ioremap;
3524 }
3525
3526 ixgbevf_assign_netdev_ops(netdev);
3527
3528 adapter->bd_number = cards_found;
3529
3530 /* Setup hw api */
3531 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
3532 hw->mac.type = ii->mac;
3533
3534 memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
3535 sizeof(struct ixgbe_mbx_operations));
3536
3537 /* setup the private structure */
3538 err = ixgbevf_sw_init(adapter);
3539 if (err)
3540 goto err_sw_init;
3541
3542 /* The HW MAC address was set and/or determined in sw_init */
3543 if (!is_valid_ether_addr(netdev->dev_addr)) {
3544 pr_err("invalid MAC address\n");
3545 err = -EIO;
3546 goto err_sw_init;
3547 }
3548
3549 netdev->hw_features = NETIF_F_SG |
3550 NETIF_F_IP_CSUM |
3551 NETIF_F_IPV6_CSUM |
3552 NETIF_F_TSO |
3553 NETIF_F_TSO6 |
3554 NETIF_F_RXCSUM;
3555
3556 netdev->features = netdev->hw_features |
3557 NETIF_F_HW_VLAN_CTAG_TX |
3558 NETIF_F_HW_VLAN_CTAG_RX |
3559 NETIF_F_HW_VLAN_CTAG_FILTER;
3560
3561 netdev->vlan_features |= NETIF_F_TSO;
3562 netdev->vlan_features |= NETIF_F_TSO6;
3563 netdev->vlan_features |= NETIF_F_IP_CSUM;
3564 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
3565 netdev->vlan_features |= NETIF_F_SG;
3566
3567 if (pci_using_dac)
3568 netdev->features |= NETIF_F_HIGHDMA;
3569
3570 netdev->priv_flags |= IFF_UNICAST_FLT;
3571
3572 init_timer(&adapter->watchdog_timer);
3573 adapter->watchdog_timer.function = ixgbevf_watchdog;
3574 adapter->watchdog_timer.data = (unsigned long)adapter;
3575
3576 if (IXGBE_REMOVED(hw->hw_addr)) {
3577 err = -EIO;
3578 goto err_sw_init;
3579 }
3580 INIT_WORK(&adapter->reset_task, ixgbevf_reset_task);
3581 INIT_WORK(&adapter->watchdog_task, ixgbevf_watchdog_task);
3582 set_bit(__IXGBEVF_WORK_INIT, &adapter->state);
3583
3584 err = ixgbevf_init_interrupt_scheme(adapter);
3585 if (err)
3586 goto err_sw_init;
3587
3588 strcpy(netdev->name, "eth%d");
3589
3590 err = register_netdev(netdev);
3591 if (err)
3592 goto err_register;
3593
3594 netif_carrier_off(netdev);
3595
3596 ixgbevf_init_last_counter_stats(adapter);
3597
3598 /* print the MAC address */
3599 hw_dbg(hw, "%pM\n", netdev->dev_addr);
3600
3601 hw_dbg(hw, "MAC: %d\n", hw->mac.type);
3602
3603 hw_dbg(hw, "Intel(R) 82599 Virtual Function\n");
3604 cards_found++;
3605 return 0;
3606
3607err_register:
3608 ixgbevf_clear_interrupt_scheme(adapter);
3609err_sw_init:
3610 ixgbevf_reset_interrupt_capability(adapter);
3611 iounmap(adapter->io_addr);
3612err_ioremap:
3613 free_netdev(netdev);
3614err_alloc_etherdev:
3615 pci_release_regions(pdev);
3616err_pci_reg:
3617err_dma:
3618 if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state))
3619 pci_disable_device(pdev);
3620 return err;
3621}
3622
3623/**
3624 * ixgbevf_remove - Device Removal Routine
3625 * @pdev: PCI device information struct
3626 *
3627 * ixgbevf_remove is called by the PCI subsystem to alert the driver
3628 * that it should release a PCI device. The could be caused by a
3629 * Hot-Plug event, or because the driver is going to be removed from
3630 * memory.
3631 **/
3632static void ixgbevf_remove(struct pci_dev *pdev)
3633{
3634 struct net_device *netdev = pci_get_drvdata(pdev);
3635 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3636
3637 set_bit(__IXGBEVF_REMOVING, &adapter->state);
3638
3639 del_timer_sync(&adapter->watchdog_timer);
3640
3641 cancel_work_sync(&adapter->reset_task);
3642 cancel_work_sync(&adapter->watchdog_task);
3643
3644 if (netdev->reg_state == NETREG_REGISTERED)
3645 unregister_netdev(netdev);
3646
3647 ixgbevf_clear_interrupt_scheme(adapter);
3648 ixgbevf_reset_interrupt_capability(adapter);
3649
3650 iounmap(adapter->io_addr);
3651 pci_release_regions(pdev);
3652
3653 hw_dbg(&adapter->hw, "Remove complete\n");
3654
3655 free_netdev(netdev);
3656
3657 if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state))
3658 pci_disable_device(pdev);
3659}
3660
3661/**
3662 * ixgbevf_io_error_detected - called when PCI error is detected
3663 * @pdev: Pointer to PCI device
3664 * @state: The current pci connection state
3665 *
3666 * This function is called after a PCI bus error affecting
3667 * this device has been detected.
3668 */
3669static pci_ers_result_t ixgbevf_io_error_detected(struct pci_dev *pdev,
3670 pci_channel_state_t state)
3671{
3672 struct net_device *netdev = pci_get_drvdata(pdev);
3673 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3674
3675 if (!test_bit(__IXGBEVF_WORK_INIT, &adapter->state))
3676 return PCI_ERS_RESULT_DISCONNECT;
3677
3678 rtnl_lock();
3679 netif_device_detach(netdev);
3680
3681 if (state == pci_channel_io_perm_failure) {
3682 rtnl_unlock();
3683 return PCI_ERS_RESULT_DISCONNECT;
3684 }
3685
3686 if (netif_running(netdev))
3687 ixgbevf_down(adapter);
3688
3689 if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state))
3690 pci_disable_device(pdev);
3691 rtnl_unlock();
3692
3693 /* Request a slot slot reset. */
3694 return PCI_ERS_RESULT_NEED_RESET;
3695}
3696
3697/**
3698 * ixgbevf_io_slot_reset - called after the pci bus has been reset.
3699 * @pdev: Pointer to PCI device
3700 *
3701 * Restart the card from scratch, as if from a cold-boot. Implementation
3702 * resembles the first-half of the ixgbevf_resume routine.
3703 */
3704static pci_ers_result_t ixgbevf_io_slot_reset(struct pci_dev *pdev)
3705{
3706 struct net_device *netdev = pci_get_drvdata(pdev);
3707 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3708
3709 if (pci_enable_device_mem(pdev)) {
3710 dev_err(&pdev->dev,
3711 "Cannot re-enable PCI device after reset.\n");
3712 return PCI_ERS_RESULT_DISCONNECT;
3713 }
3714
3715 smp_mb__before_clear_bit();
3716 clear_bit(__IXGBEVF_DISABLED, &adapter->state);
3717 pci_set_master(pdev);
3718
3719 ixgbevf_reset(adapter);
3720
3721 return PCI_ERS_RESULT_RECOVERED;
3722}
3723
3724/**
3725 * ixgbevf_io_resume - called when traffic can start flowing again.
3726 * @pdev: Pointer to PCI device
3727 *
3728 * This callback is called when the error recovery driver tells us that
3729 * its OK to resume normal operation. Implementation resembles the
3730 * second-half of the ixgbevf_resume routine.
3731 */
3732static void ixgbevf_io_resume(struct pci_dev *pdev)
3733{
3734 struct net_device *netdev = pci_get_drvdata(pdev);
3735 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3736
3737 if (netif_running(netdev))
3738 ixgbevf_up(adapter);
3739
3740 netif_device_attach(netdev);
3741}
3742
3743/* PCI Error Recovery (ERS) */
3744static const struct pci_error_handlers ixgbevf_err_handler = {
3745 .error_detected = ixgbevf_io_error_detected,
3746 .slot_reset = ixgbevf_io_slot_reset,
3747 .resume = ixgbevf_io_resume,
3748};
3749
3750static struct pci_driver ixgbevf_driver = {
3751 .name = ixgbevf_driver_name,
3752 .id_table = ixgbevf_pci_tbl,
3753 .probe = ixgbevf_probe,
3754 .remove = ixgbevf_remove,
3755#ifdef CONFIG_PM
3756 /* Power Management Hooks */
3757 .suspend = ixgbevf_suspend,
3758 .resume = ixgbevf_resume,
3759#endif
3760 .shutdown = ixgbevf_shutdown,
3761 .err_handler = &ixgbevf_err_handler
3762};
3763
3764/**
3765 * ixgbevf_init_module - Driver Registration Routine
3766 *
3767 * ixgbevf_init_module is the first routine called when the driver is
3768 * loaded. All it does is register with the PCI subsystem.
3769 **/
3770static int __init ixgbevf_init_module(void)
3771{
3772 int ret;
3773 pr_info("%s - version %s\n", ixgbevf_driver_string,
3774 ixgbevf_driver_version);
3775
3776 pr_info("%s\n", ixgbevf_copyright);
3777
3778 ret = pci_register_driver(&ixgbevf_driver);
3779 return ret;
3780}
3781
3782module_init(ixgbevf_init_module);
3783
3784/**
3785 * ixgbevf_exit_module - Driver Exit Cleanup Routine
3786 *
3787 * ixgbevf_exit_module is called just before the driver is removed
3788 * from memory.
3789 **/
3790static void __exit ixgbevf_exit_module(void)
3791{
3792 pci_unregister_driver(&ixgbevf_driver);
3793}
3794
3795#ifdef DEBUG
3796/**
3797 * ixgbevf_get_hw_dev_name - return device name string
3798 * used by hardware layer to print debugging information
3799 **/
3800char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw)
3801{
3802 struct ixgbevf_adapter *adapter = hw->back;
3803 return adapter->netdev->name;
3804}
3805
3806#endif
3807module_exit(ixgbevf_exit_module);
3808
3809/* ixgbevf_main.c */