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1/*******************************************************************************
2 *
3 * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
4 * Copyright(c) 2013 - 2016 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
16 * with this program. If not, see <http://www.gnu.org/licenses/>.
17 *
18 * The full GNU General Public License is included in this distribution in
19 * the file called "COPYING".
20 *
21 * Contact Information:
22 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24 *
25 ******************************************************************************/
26
27#include "i40evf.h"
28#include "i40e_prototype.h"
29static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter);
30static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter);
31static int i40evf_close(struct net_device *netdev);
32
33char i40evf_driver_name[] = "i40evf";
34static const char i40evf_driver_string[] =
35 "Intel(R) 40-10 Gigabit Virtual Function Network Driver";
36
37#define DRV_KERN "-k"
38
39#define DRV_VERSION_MAJOR 1
40#define DRV_VERSION_MINOR 6
41#define DRV_VERSION_BUILD 25
42#define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
43 __stringify(DRV_VERSION_MINOR) "." \
44 __stringify(DRV_VERSION_BUILD) \
45 DRV_KERN
46const char i40evf_driver_version[] = DRV_VERSION;
47static const char i40evf_copyright[] =
48 "Copyright (c) 2013 - 2015 Intel Corporation.";
49
50/* i40evf_pci_tbl - PCI Device ID Table
51 *
52 * Wildcard entries (PCI_ANY_ID) should come last
53 * Last entry must be all 0s
54 *
55 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
56 * Class, Class Mask, private data (not used) }
57 */
58static const struct pci_device_id i40evf_pci_tbl[] = {
59 {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
60 {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF_HV), 0},
61 {PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF), 0},
62 {PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF_HV), 0},
63 /* required last entry */
64 {0, }
65};
66
67MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
68
69MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
70MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
71MODULE_LICENSE("GPL");
72MODULE_VERSION(DRV_VERSION);
73
74static struct workqueue_struct *i40evf_wq;
75
76/**
77 * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
78 * @hw: pointer to the HW structure
79 * @mem: ptr to mem struct to fill out
80 * @size: size of memory requested
81 * @alignment: what to align the allocation to
82 **/
83i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
84 struct i40e_dma_mem *mem,
85 u64 size, u32 alignment)
86{
87 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
88
89 if (!mem)
90 return I40E_ERR_PARAM;
91
92 mem->size = ALIGN(size, alignment);
93 mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
94 (dma_addr_t *)&mem->pa, GFP_KERNEL);
95 if (mem->va)
96 return 0;
97 else
98 return I40E_ERR_NO_MEMORY;
99}
100
101/**
102 * i40evf_free_dma_mem_d - OS specific memory free for shared code
103 * @hw: pointer to the HW structure
104 * @mem: ptr to mem struct to free
105 **/
106i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
107{
108 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
109
110 if (!mem || !mem->va)
111 return I40E_ERR_PARAM;
112 dma_free_coherent(&adapter->pdev->dev, mem->size,
113 mem->va, (dma_addr_t)mem->pa);
114 return 0;
115}
116
117/**
118 * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
119 * @hw: pointer to the HW structure
120 * @mem: ptr to mem struct to fill out
121 * @size: size of memory requested
122 **/
123i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
124 struct i40e_virt_mem *mem, u32 size)
125{
126 if (!mem)
127 return I40E_ERR_PARAM;
128
129 mem->size = size;
130 mem->va = kzalloc(size, GFP_KERNEL);
131
132 if (mem->va)
133 return 0;
134 else
135 return I40E_ERR_NO_MEMORY;
136}
137
138/**
139 * i40evf_free_virt_mem_d - OS specific memory free for shared code
140 * @hw: pointer to the HW structure
141 * @mem: ptr to mem struct to free
142 **/
143i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
144 struct i40e_virt_mem *mem)
145{
146 if (!mem)
147 return I40E_ERR_PARAM;
148
149 /* it's ok to kfree a NULL pointer */
150 kfree(mem->va);
151
152 return 0;
153}
154
155/**
156 * i40evf_debug_d - OS dependent version of debug printing
157 * @hw: pointer to the HW structure
158 * @mask: debug level mask
159 * @fmt_str: printf-type format description
160 **/
161void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
162{
163 char buf[512];
164 va_list argptr;
165
166 if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
167 return;
168
169 va_start(argptr, fmt_str);
170 vsnprintf(buf, sizeof(buf), fmt_str, argptr);
171 va_end(argptr);
172
173 /* the debug string is already formatted with a newline */
174 pr_info("%s", buf);
175}
176
177/**
178 * i40evf_schedule_reset - Set the flags and schedule a reset event
179 * @adapter: board private structure
180 **/
181void i40evf_schedule_reset(struct i40evf_adapter *adapter)
182{
183 if (!(adapter->flags &
184 (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED))) {
185 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
186 schedule_work(&adapter->reset_task);
187 }
188}
189
190/**
191 * i40evf_tx_timeout - Respond to a Tx Hang
192 * @netdev: network interface device structure
193 **/
194static void i40evf_tx_timeout(struct net_device *netdev)
195{
196 struct i40evf_adapter *adapter = netdev_priv(netdev);
197
198 adapter->tx_timeout_count++;
199 i40evf_schedule_reset(adapter);
200}
201
202/**
203 * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
204 * @adapter: board private structure
205 **/
206static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
207{
208 struct i40e_hw *hw = &adapter->hw;
209
210 if (!adapter->msix_entries)
211 return;
212
213 wr32(hw, I40E_VFINT_DYN_CTL01, 0);
214
215 /* read flush */
216 rd32(hw, I40E_VFGEN_RSTAT);
217
218 synchronize_irq(adapter->msix_entries[0].vector);
219}
220
221/**
222 * i40evf_misc_irq_enable - Enable default interrupt generation settings
223 * @adapter: board private structure
224 **/
225static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
226{
227 struct i40e_hw *hw = &adapter->hw;
228
229 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
230 I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
231 wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA1_ADMINQ_MASK);
232
233 /* read flush */
234 rd32(hw, I40E_VFGEN_RSTAT);
235}
236
237/**
238 * i40evf_irq_disable - Mask off interrupt generation on the NIC
239 * @adapter: board private structure
240 **/
241static void i40evf_irq_disable(struct i40evf_adapter *adapter)
242{
243 int i;
244 struct i40e_hw *hw = &adapter->hw;
245
246 if (!adapter->msix_entries)
247 return;
248
249 for (i = 1; i < adapter->num_msix_vectors; i++) {
250 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
251 synchronize_irq(adapter->msix_entries[i].vector);
252 }
253 /* read flush */
254 rd32(hw, I40E_VFGEN_RSTAT);
255}
256
257/**
258 * i40evf_irq_enable_queues - Enable interrupt for specified queues
259 * @adapter: board private structure
260 * @mask: bitmap of queues to enable
261 **/
262void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
263{
264 struct i40e_hw *hw = &adapter->hw;
265 int i;
266
267 for (i = 1; i < adapter->num_msix_vectors; i++) {
268 if (mask & BIT(i - 1)) {
269 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
270 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
271 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
272 I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK);
273 }
274 }
275}
276
277/**
278 * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
279 * @adapter: board private structure
280 * @mask: bitmap of vectors to trigger
281 **/
282static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
283{
284 struct i40e_hw *hw = &adapter->hw;
285 int i;
286 u32 dyn_ctl;
287
288 if (mask & 1) {
289 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
290 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
291 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
292 I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
293 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
294 }
295 for (i = 1; i < adapter->num_msix_vectors; i++) {
296 if (mask & BIT(i)) {
297 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
298 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
299 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
300 I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
301 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
302 }
303 }
304}
305
306/**
307 * i40evf_irq_enable - Enable default interrupt generation settings
308 * @adapter: board private structure
309 * @flush: boolean value whether to run rd32()
310 **/
311void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
312{
313 struct i40e_hw *hw = &adapter->hw;
314
315 i40evf_misc_irq_enable(adapter);
316 i40evf_irq_enable_queues(adapter, ~0);
317
318 if (flush)
319 rd32(hw, I40E_VFGEN_RSTAT);
320}
321
322/**
323 * i40evf_msix_aq - Interrupt handler for vector 0
324 * @irq: interrupt number
325 * @data: pointer to netdev
326 **/
327static irqreturn_t i40evf_msix_aq(int irq, void *data)
328{
329 struct net_device *netdev = data;
330 struct i40evf_adapter *adapter = netdev_priv(netdev);
331 struct i40e_hw *hw = &adapter->hw;
332 u32 val;
333
334 /* handle non-queue interrupts, these reads clear the registers */
335 val = rd32(hw, I40E_VFINT_ICR01);
336 val = rd32(hw, I40E_VFINT_ICR0_ENA1);
337
338 val = rd32(hw, I40E_VFINT_DYN_CTL01) |
339 I40E_VFINT_DYN_CTL01_CLEARPBA_MASK;
340 wr32(hw, I40E_VFINT_DYN_CTL01, val);
341
342 /* schedule work on the private workqueue */
343 schedule_work(&adapter->adminq_task);
344
345 return IRQ_HANDLED;
346}
347
348/**
349 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
350 * @irq: interrupt number
351 * @data: pointer to a q_vector
352 **/
353static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
354{
355 struct i40e_q_vector *q_vector = data;
356
357 if (!q_vector->tx.ring && !q_vector->rx.ring)
358 return IRQ_HANDLED;
359
360 napi_schedule_irqoff(&q_vector->napi);
361
362 return IRQ_HANDLED;
363}
364
365/**
366 * i40evf_map_vector_to_rxq - associate irqs with rx queues
367 * @adapter: board private structure
368 * @v_idx: interrupt number
369 * @r_idx: queue number
370 **/
371static void
372i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
373{
374 struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
375 struct i40e_ring *rx_ring = &adapter->rx_rings[r_idx];
376 struct i40e_hw *hw = &adapter->hw;
377
378 rx_ring->q_vector = q_vector;
379 rx_ring->next = q_vector->rx.ring;
380 rx_ring->vsi = &adapter->vsi;
381 q_vector->rx.ring = rx_ring;
382 q_vector->rx.count++;
383 q_vector->rx.latency_range = I40E_LOW_LATENCY;
384 q_vector->rx.itr = ITR_TO_REG(rx_ring->rx_itr_setting);
385 q_vector->ring_mask |= BIT(r_idx);
386 q_vector->itr_countdown = ITR_COUNTDOWN_START;
387 wr32(hw, I40E_VFINT_ITRN1(I40E_RX_ITR, v_idx - 1), q_vector->rx.itr);
388}
389
390/**
391 * i40evf_map_vector_to_txq - associate irqs with tx queues
392 * @adapter: board private structure
393 * @v_idx: interrupt number
394 * @t_idx: queue number
395 **/
396static void
397i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
398{
399 struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
400 struct i40e_ring *tx_ring = &adapter->tx_rings[t_idx];
401 struct i40e_hw *hw = &adapter->hw;
402
403 tx_ring->q_vector = q_vector;
404 tx_ring->next = q_vector->tx.ring;
405 tx_ring->vsi = &adapter->vsi;
406 q_vector->tx.ring = tx_ring;
407 q_vector->tx.count++;
408 q_vector->tx.latency_range = I40E_LOW_LATENCY;
409 q_vector->tx.itr = ITR_TO_REG(tx_ring->tx_itr_setting);
410 q_vector->itr_countdown = ITR_COUNTDOWN_START;
411 q_vector->num_ringpairs++;
412 wr32(hw, I40E_VFINT_ITRN1(I40E_TX_ITR, v_idx - 1), q_vector->tx.itr);
413}
414
415/**
416 * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
417 * @adapter: board private structure to initialize
418 *
419 * This function maps descriptor rings to the queue-specific vectors
420 * we were allotted through the MSI-X enabling code. Ideally, we'd have
421 * one vector per ring/queue, but on a constrained vector budget, we
422 * group the rings as "efficiently" as possible. You would add new
423 * mapping configurations in here.
424 **/
425static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
426{
427 int q_vectors;
428 int v_start = 0;
429 int rxr_idx = 0, txr_idx = 0;
430 int rxr_remaining = adapter->num_active_queues;
431 int txr_remaining = adapter->num_active_queues;
432 int i, j;
433 int rqpv, tqpv;
434 int err = 0;
435
436 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
437
438 /* The ideal configuration...
439 * We have enough vectors to map one per queue.
440 */
441 if (q_vectors >= (rxr_remaining * 2)) {
442 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
443 i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
444
445 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
446 i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
447 goto out;
448 }
449
450 /* If we don't have enough vectors for a 1-to-1
451 * mapping, we'll have to group them so there are
452 * multiple queues per vector.
453 * Re-adjusting *qpv takes care of the remainder.
454 */
455 for (i = v_start; i < q_vectors; i++) {
456 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
457 for (j = 0; j < rqpv; j++) {
458 i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
459 rxr_idx++;
460 rxr_remaining--;
461 }
462 }
463 for (i = v_start; i < q_vectors; i++) {
464 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
465 for (j = 0; j < tqpv; j++) {
466 i40evf_map_vector_to_txq(adapter, i, txr_idx);
467 txr_idx++;
468 txr_remaining--;
469 }
470 }
471
472out:
473 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
474
475 return err;
476}
477
478#ifdef CONFIG_NET_POLL_CONTROLLER
479/**
480 * i40evf_netpoll - A Polling 'interrupt' handler
481 * @netdev: network interface device structure
482 *
483 * This is used by netconsole to send skbs without having to re-enable
484 * interrupts. It's not called while the normal interrupt routine is executing.
485 **/
486static void i40evf_netpoll(struct net_device *netdev)
487{
488 struct i40evf_adapter *adapter = netdev_priv(netdev);
489 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
490 int i;
491
492 /* if interface is down do nothing */
493 if (test_bit(__I40E_DOWN, &adapter->vsi.state))
494 return;
495
496 for (i = 0; i < q_vectors; i++)
497 i40evf_msix_clean_rings(0, &adapter->q_vectors[i]);
498}
499
500#endif
501/**
502 * i40evf_irq_affinity_notify - Callback for affinity changes
503 * @notify: context as to what irq was changed
504 * @mask: the new affinity mask
505 *
506 * This is a callback function used by the irq_set_affinity_notifier function
507 * so that we may register to receive changes to the irq affinity masks.
508 **/
509static void i40evf_irq_affinity_notify(struct irq_affinity_notify *notify,
510 const cpumask_t *mask)
511{
512 struct i40e_q_vector *q_vector =
513 container_of(notify, struct i40e_q_vector, affinity_notify);
514
515 q_vector->affinity_mask = *mask;
516}
517
518/**
519 * i40evf_irq_affinity_release - Callback for affinity notifier release
520 * @ref: internal core kernel usage
521 *
522 * This is a callback function used by the irq_set_affinity_notifier function
523 * to inform the current notification subscriber that they will no longer
524 * receive notifications.
525 **/
526static void i40evf_irq_affinity_release(struct kref *ref) {}
527
528/**
529 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
530 * @adapter: board private structure
531 *
532 * Allocates MSI-X vectors for tx and rx handling, and requests
533 * interrupts from the kernel.
534 **/
535static int
536i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
537{
538 int vector, err, q_vectors;
539 int rx_int_idx = 0, tx_int_idx = 0;
540 int irq_num;
541
542 i40evf_irq_disable(adapter);
543 /* Decrement for Other and TCP Timer vectors */
544 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
545
546 for (vector = 0; vector < q_vectors; vector++) {
547 struct i40e_q_vector *q_vector = &adapter->q_vectors[vector];
548 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
549
550 if (q_vector->tx.ring && q_vector->rx.ring) {
551 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
552 "i40evf-%s-%s-%d", basename,
553 "TxRx", rx_int_idx++);
554 tx_int_idx++;
555 } else if (q_vector->rx.ring) {
556 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
557 "i40evf-%s-%s-%d", basename,
558 "rx", rx_int_idx++);
559 } else if (q_vector->tx.ring) {
560 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
561 "i40evf-%s-%s-%d", basename,
562 "tx", tx_int_idx++);
563 } else {
564 /* skip this unused q_vector */
565 continue;
566 }
567 err = request_irq(irq_num,
568 i40evf_msix_clean_rings,
569 0,
570 q_vector->name,
571 q_vector);
572 if (err) {
573 dev_info(&adapter->pdev->dev,
574 "Request_irq failed, error: %d\n", err);
575 goto free_queue_irqs;
576 }
577 /* register for affinity change notifications */
578 q_vector->affinity_notify.notify = i40evf_irq_affinity_notify;
579 q_vector->affinity_notify.release =
580 i40evf_irq_affinity_release;
581 irq_set_affinity_notifier(irq_num, &q_vector->affinity_notify);
582 /* assign the mask for this irq */
583 irq_set_affinity_hint(irq_num, &q_vector->affinity_mask);
584 }
585
586 return 0;
587
588free_queue_irqs:
589 while (vector) {
590 vector--;
591 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
592 irq_set_affinity_notifier(irq_num, NULL);
593 irq_set_affinity_hint(irq_num, NULL);
594 free_irq(irq_num, &adapter->q_vectors[vector]);
595 }
596 return err;
597}
598
599/**
600 * i40evf_request_misc_irq - Initialize MSI-X interrupts
601 * @adapter: board private structure
602 *
603 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
604 * vector is only for the admin queue, and stays active even when the netdev
605 * is closed.
606 **/
607static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
608{
609 struct net_device *netdev = adapter->netdev;
610 int err;
611
612 snprintf(adapter->misc_vector_name,
613 sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
614 dev_name(&adapter->pdev->dev));
615 err = request_irq(adapter->msix_entries[0].vector,
616 &i40evf_msix_aq, 0,
617 adapter->misc_vector_name, netdev);
618 if (err) {
619 dev_err(&adapter->pdev->dev,
620 "request_irq for %s failed: %d\n",
621 adapter->misc_vector_name, err);
622 free_irq(adapter->msix_entries[0].vector, netdev);
623 }
624 return err;
625}
626
627/**
628 * i40evf_free_traffic_irqs - Free MSI-X interrupts
629 * @adapter: board private structure
630 *
631 * Frees all MSI-X vectors other than 0.
632 **/
633static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
634{
635 int vector, irq_num, q_vectors;
636
637 if (!adapter->msix_entries)
638 return;
639
640 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
641
642 for (vector = 0; vector < q_vectors; vector++) {
643 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
644 irq_set_affinity_notifier(irq_num, NULL);
645 irq_set_affinity_hint(irq_num, NULL);
646 free_irq(irq_num, &adapter->q_vectors[vector]);
647 }
648}
649
650/**
651 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
652 * @adapter: board private structure
653 *
654 * Frees MSI-X vector 0.
655 **/
656static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
657{
658 struct net_device *netdev = adapter->netdev;
659
660 if (!adapter->msix_entries)
661 return;
662
663 free_irq(adapter->msix_entries[0].vector, netdev);
664}
665
666/**
667 * i40evf_configure_tx - Configure Transmit Unit after Reset
668 * @adapter: board private structure
669 *
670 * Configure the Tx unit of the MAC after a reset.
671 **/
672static void i40evf_configure_tx(struct i40evf_adapter *adapter)
673{
674 struct i40e_hw *hw = &adapter->hw;
675 int i;
676
677 for (i = 0; i < adapter->num_active_queues; i++)
678 adapter->tx_rings[i].tail = hw->hw_addr + I40E_QTX_TAIL1(i);
679}
680
681/**
682 * i40evf_configure_rx - Configure Receive Unit after Reset
683 * @adapter: board private structure
684 *
685 * Configure the Rx unit of the MAC after a reset.
686 **/
687static void i40evf_configure_rx(struct i40evf_adapter *adapter)
688{
689 struct i40e_hw *hw = &adapter->hw;
690 int i;
691
692 for (i = 0; i < adapter->num_active_queues; i++) {
693 adapter->rx_rings[i].tail = hw->hw_addr + I40E_QRX_TAIL1(i);
694 adapter->rx_rings[i].rx_buf_len = I40EVF_RXBUFFER_2048;
695 }
696}
697
698/**
699 * i40evf_find_vlan - Search filter list for specific vlan filter
700 * @adapter: board private structure
701 * @vlan: vlan tag
702 *
703 * Returns ptr to the filter object or NULL
704 **/
705static struct
706i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
707{
708 struct i40evf_vlan_filter *f;
709
710 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
711 if (vlan == f->vlan)
712 return f;
713 }
714 return NULL;
715}
716
717/**
718 * i40evf_add_vlan - Add a vlan filter to the list
719 * @adapter: board private structure
720 * @vlan: VLAN tag
721 *
722 * Returns ptr to the filter object or NULL when no memory available.
723 **/
724static struct
725i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
726{
727 struct i40evf_vlan_filter *f = NULL;
728 int count = 50;
729
730 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
731 &adapter->crit_section)) {
732 udelay(1);
733 if (--count == 0)
734 goto out;
735 }
736
737 f = i40evf_find_vlan(adapter, vlan);
738 if (!f) {
739 f = kzalloc(sizeof(*f), GFP_ATOMIC);
740 if (!f)
741 goto clearout;
742
743 f->vlan = vlan;
744
745 INIT_LIST_HEAD(&f->list);
746 list_add(&f->list, &adapter->vlan_filter_list);
747 f->add = true;
748 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
749 }
750
751clearout:
752 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
753out:
754 return f;
755}
756
757/**
758 * i40evf_del_vlan - Remove a vlan filter from the list
759 * @adapter: board private structure
760 * @vlan: VLAN tag
761 **/
762static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
763{
764 struct i40evf_vlan_filter *f;
765 int count = 50;
766
767 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
768 &adapter->crit_section)) {
769 udelay(1);
770 if (--count == 0)
771 return;
772 }
773
774 f = i40evf_find_vlan(adapter, vlan);
775 if (f) {
776 f->remove = true;
777 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
778 }
779 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
780}
781
782/**
783 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
784 * @netdev: network device struct
785 * @vid: VLAN tag
786 **/
787static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
788 __always_unused __be16 proto, u16 vid)
789{
790 struct i40evf_adapter *adapter = netdev_priv(netdev);
791
792 if (!VLAN_ALLOWED(adapter))
793 return -EIO;
794 if (i40evf_add_vlan(adapter, vid) == NULL)
795 return -ENOMEM;
796 return 0;
797}
798
799/**
800 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
801 * @netdev: network device struct
802 * @vid: VLAN tag
803 **/
804static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
805 __always_unused __be16 proto, u16 vid)
806{
807 struct i40evf_adapter *adapter = netdev_priv(netdev);
808
809 if (VLAN_ALLOWED(adapter)) {
810 i40evf_del_vlan(adapter, vid);
811 return 0;
812 }
813 return -EIO;
814}
815
816/**
817 * i40evf_find_filter - Search filter list for specific mac filter
818 * @adapter: board private structure
819 * @macaddr: the MAC address
820 *
821 * Returns ptr to the filter object or NULL
822 **/
823static struct
824i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
825 u8 *macaddr)
826{
827 struct i40evf_mac_filter *f;
828
829 if (!macaddr)
830 return NULL;
831
832 list_for_each_entry(f, &adapter->mac_filter_list, list) {
833 if (ether_addr_equal(macaddr, f->macaddr))
834 return f;
835 }
836 return NULL;
837}
838
839/**
840 * i40e_add_filter - Add a mac filter to the filter list
841 * @adapter: board private structure
842 * @macaddr: the MAC address
843 *
844 * Returns ptr to the filter object or NULL when no memory available.
845 **/
846static struct
847i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
848 u8 *macaddr)
849{
850 struct i40evf_mac_filter *f;
851 int count = 50;
852
853 if (!macaddr)
854 return NULL;
855
856 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
857 &adapter->crit_section)) {
858 udelay(1);
859 if (--count == 0)
860 return NULL;
861 }
862
863 f = i40evf_find_filter(adapter, macaddr);
864 if (!f) {
865 f = kzalloc(sizeof(*f), GFP_ATOMIC);
866 if (!f) {
867 clear_bit(__I40EVF_IN_CRITICAL_TASK,
868 &adapter->crit_section);
869 return NULL;
870 }
871
872 ether_addr_copy(f->macaddr, macaddr);
873
874 list_add_tail(&f->list, &adapter->mac_filter_list);
875 f->add = true;
876 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
877 }
878
879 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
880 return f;
881}
882
883/**
884 * i40evf_set_mac - NDO callback to set port mac address
885 * @netdev: network interface device structure
886 * @p: pointer to an address structure
887 *
888 * Returns 0 on success, negative on failure
889 **/
890static int i40evf_set_mac(struct net_device *netdev, void *p)
891{
892 struct i40evf_adapter *adapter = netdev_priv(netdev);
893 struct i40e_hw *hw = &adapter->hw;
894 struct i40evf_mac_filter *f;
895 struct sockaddr *addr = p;
896
897 if (!is_valid_ether_addr(addr->sa_data))
898 return -EADDRNOTAVAIL;
899
900 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
901 return 0;
902
903 if (adapter->flags & I40EVF_FLAG_ADDR_SET_BY_PF)
904 return -EPERM;
905
906 f = i40evf_find_filter(adapter, hw->mac.addr);
907 if (f) {
908 f->remove = true;
909 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
910 }
911
912 f = i40evf_add_filter(adapter, addr->sa_data);
913 if (f) {
914 ether_addr_copy(hw->mac.addr, addr->sa_data);
915 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
916 }
917
918 return (f == NULL) ? -ENOMEM : 0;
919}
920
921/**
922 * i40evf_set_rx_mode - NDO callback to set the netdev filters
923 * @netdev: network interface device structure
924 **/
925static void i40evf_set_rx_mode(struct net_device *netdev)
926{
927 struct i40evf_adapter *adapter = netdev_priv(netdev);
928 struct i40evf_mac_filter *f, *ftmp;
929 struct netdev_hw_addr *uca;
930 struct netdev_hw_addr *mca;
931 struct netdev_hw_addr *ha;
932 int count = 50;
933
934 /* add addr if not already in the filter list */
935 netdev_for_each_uc_addr(uca, netdev) {
936 i40evf_add_filter(adapter, uca->addr);
937 }
938 netdev_for_each_mc_addr(mca, netdev) {
939 i40evf_add_filter(adapter, mca->addr);
940 }
941
942 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
943 &adapter->crit_section)) {
944 udelay(1);
945 if (--count == 0) {
946 dev_err(&adapter->pdev->dev,
947 "Failed to get lock in %s\n", __func__);
948 return;
949 }
950 }
951 /* remove filter if not in netdev list */
952 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
953 netdev_for_each_mc_addr(mca, netdev)
954 if (ether_addr_equal(mca->addr, f->macaddr))
955 goto bottom_of_search_loop;
956
957 netdev_for_each_uc_addr(uca, netdev)
958 if (ether_addr_equal(uca->addr, f->macaddr))
959 goto bottom_of_search_loop;
960
961 for_each_dev_addr(netdev, ha)
962 if (ether_addr_equal(ha->addr, f->macaddr))
963 goto bottom_of_search_loop;
964
965 if (ether_addr_equal(f->macaddr, adapter->hw.mac.addr))
966 goto bottom_of_search_loop;
967
968 /* f->macaddr wasn't found in uc, mc, or ha list so delete it */
969 f->remove = true;
970 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
971
972bottom_of_search_loop:
973 continue;
974 }
975
976 if (netdev->flags & IFF_PROMISC &&
977 !(adapter->flags & I40EVF_FLAG_PROMISC_ON))
978 adapter->aq_required |= I40EVF_FLAG_AQ_REQUEST_PROMISC;
979 else if (!(netdev->flags & IFF_PROMISC) &&
980 adapter->flags & I40EVF_FLAG_PROMISC_ON)
981 adapter->aq_required |= I40EVF_FLAG_AQ_RELEASE_PROMISC;
982
983 if (netdev->flags & IFF_ALLMULTI &&
984 !(adapter->flags & I40EVF_FLAG_ALLMULTI_ON))
985 adapter->aq_required |= I40EVF_FLAG_AQ_REQUEST_ALLMULTI;
986 else if (!(netdev->flags & IFF_ALLMULTI) &&
987 adapter->flags & I40EVF_FLAG_ALLMULTI_ON)
988 adapter->aq_required |= I40EVF_FLAG_AQ_RELEASE_ALLMULTI;
989
990 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
991}
992
993/**
994 * i40evf_napi_enable_all - enable NAPI on all queue vectors
995 * @adapter: board private structure
996 **/
997static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
998{
999 int q_idx;
1000 struct i40e_q_vector *q_vector;
1001 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1002
1003 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1004 struct napi_struct *napi;
1005
1006 q_vector = &adapter->q_vectors[q_idx];
1007 napi = &q_vector->napi;
1008 napi_enable(napi);
1009 }
1010}
1011
1012/**
1013 * i40evf_napi_disable_all - disable NAPI on all queue vectors
1014 * @adapter: board private structure
1015 **/
1016static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
1017{
1018 int q_idx;
1019 struct i40e_q_vector *q_vector;
1020 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1021
1022 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1023 q_vector = &adapter->q_vectors[q_idx];
1024 napi_disable(&q_vector->napi);
1025 }
1026}
1027
1028/**
1029 * i40evf_configure - set up transmit and receive data structures
1030 * @adapter: board private structure
1031 **/
1032static void i40evf_configure(struct i40evf_adapter *adapter)
1033{
1034 struct net_device *netdev = adapter->netdev;
1035 int i;
1036
1037 i40evf_set_rx_mode(netdev);
1038
1039 i40evf_configure_tx(adapter);
1040 i40evf_configure_rx(adapter);
1041 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
1042
1043 for (i = 0; i < adapter->num_active_queues; i++) {
1044 struct i40e_ring *ring = &adapter->rx_rings[i];
1045
1046 i40evf_alloc_rx_buffers(ring, I40E_DESC_UNUSED(ring));
1047 }
1048}
1049
1050/**
1051 * i40evf_up_complete - Finish the last steps of bringing up a connection
1052 * @adapter: board private structure
1053 **/
1054static void i40evf_up_complete(struct i40evf_adapter *adapter)
1055{
1056 adapter->state = __I40EVF_RUNNING;
1057 clear_bit(__I40E_DOWN, &adapter->vsi.state);
1058
1059 i40evf_napi_enable_all(adapter);
1060
1061 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
1062 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
1063}
1064
1065/**
1066 * i40e_down - Shutdown the connection processing
1067 * @adapter: board private structure
1068 **/
1069void i40evf_down(struct i40evf_adapter *adapter)
1070{
1071 struct net_device *netdev = adapter->netdev;
1072 struct i40evf_mac_filter *f;
1073
1074 if (adapter->state <= __I40EVF_DOWN_PENDING)
1075 return;
1076
1077 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1078 &adapter->crit_section))
1079 usleep_range(500, 1000);
1080
1081 netif_carrier_off(netdev);
1082 netif_tx_disable(netdev);
1083 adapter->link_up = false;
1084 i40evf_napi_disable_all(adapter);
1085 i40evf_irq_disable(adapter);
1086
1087 /* remove all MAC filters */
1088 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1089 f->remove = true;
1090 }
1091 /* remove all VLAN filters */
1092 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1093 f->remove = true;
1094 }
1095 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1096 adapter->state != __I40EVF_RESETTING) {
1097 /* cancel any current operation */
1098 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1099 /* Schedule operations to close down the HW. Don't wait
1100 * here for this to complete. The watchdog is still running
1101 * and it will take care of this.
1102 */
1103 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
1104 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
1105 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
1106 }
1107
1108 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1109}
1110
1111/**
1112 * i40evf_acquire_msix_vectors - Setup the MSIX capability
1113 * @adapter: board private structure
1114 * @vectors: number of vectors to request
1115 *
1116 * Work with the OS to set up the MSIX vectors needed.
1117 *
1118 * Returns 0 on success, negative on failure
1119 **/
1120static int
1121i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1122{
1123 int err, vector_threshold;
1124
1125 /* We'll want at least 3 (vector_threshold):
1126 * 0) Other (Admin Queue and link, mostly)
1127 * 1) TxQ[0] Cleanup
1128 * 2) RxQ[0] Cleanup
1129 */
1130 vector_threshold = MIN_MSIX_COUNT;
1131
1132 /* The more we get, the more we will assign to Tx/Rx Cleanup
1133 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1134 * Right now, we simply care about how many we'll get; we'll
1135 * set them up later while requesting irq's.
1136 */
1137 err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1138 vector_threshold, vectors);
1139 if (err < 0) {
1140 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1141 kfree(adapter->msix_entries);
1142 adapter->msix_entries = NULL;
1143 return err;
1144 }
1145
1146 /* Adjust for only the vectors we'll use, which is minimum
1147 * of max_msix_q_vectors + NONQ_VECS, or the number of
1148 * vectors we were allocated.
1149 */
1150 adapter->num_msix_vectors = err;
1151 return 0;
1152}
1153
1154/**
1155 * i40evf_free_queues - Free memory for all rings
1156 * @adapter: board private structure to initialize
1157 *
1158 * Free all of the memory associated with queue pairs.
1159 **/
1160static void i40evf_free_queues(struct i40evf_adapter *adapter)
1161{
1162 if (!adapter->vsi_res)
1163 return;
1164 kfree(adapter->tx_rings);
1165 adapter->tx_rings = NULL;
1166 kfree(adapter->rx_rings);
1167 adapter->rx_rings = NULL;
1168}
1169
1170/**
1171 * i40evf_alloc_queues - Allocate memory for all rings
1172 * @adapter: board private structure to initialize
1173 *
1174 * We allocate one ring per queue at run-time since we don't know the
1175 * number of queues at compile-time. The polling_netdev array is
1176 * intended for Multiqueue, but should work fine with a single queue.
1177 **/
1178static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1179{
1180 int i;
1181
1182 adapter->tx_rings = kcalloc(adapter->num_active_queues,
1183 sizeof(struct i40e_ring), GFP_KERNEL);
1184 if (!adapter->tx_rings)
1185 goto err_out;
1186 adapter->rx_rings = kcalloc(adapter->num_active_queues,
1187 sizeof(struct i40e_ring), GFP_KERNEL);
1188 if (!adapter->rx_rings)
1189 goto err_out;
1190
1191 for (i = 0; i < adapter->num_active_queues; i++) {
1192 struct i40e_ring *tx_ring;
1193 struct i40e_ring *rx_ring;
1194
1195 tx_ring = &adapter->tx_rings[i];
1196
1197 tx_ring->queue_index = i;
1198 tx_ring->netdev = adapter->netdev;
1199 tx_ring->dev = &adapter->pdev->dev;
1200 tx_ring->count = adapter->tx_desc_count;
1201 tx_ring->tx_itr_setting = (I40E_ITR_DYNAMIC | I40E_ITR_TX_DEF);
1202 if (adapter->flags & I40E_FLAG_WB_ON_ITR_CAPABLE)
1203 tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR;
1204
1205 rx_ring = &adapter->rx_rings[i];
1206 rx_ring->queue_index = i;
1207 rx_ring->netdev = adapter->netdev;
1208 rx_ring->dev = &adapter->pdev->dev;
1209 rx_ring->count = adapter->rx_desc_count;
1210 rx_ring->rx_itr_setting = (I40E_ITR_DYNAMIC | I40E_ITR_RX_DEF);
1211 }
1212
1213 return 0;
1214
1215err_out:
1216 i40evf_free_queues(adapter);
1217 return -ENOMEM;
1218}
1219
1220/**
1221 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1222 * @adapter: board private structure to initialize
1223 *
1224 * Attempt to configure the interrupts using the best available
1225 * capabilities of the hardware and the kernel.
1226 **/
1227static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1228{
1229 int vector, v_budget;
1230 int pairs = 0;
1231 int err = 0;
1232
1233 if (!adapter->vsi_res) {
1234 err = -EIO;
1235 goto out;
1236 }
1237 pairs = adapter->num_active_queues;
1238
1239 /* It's easy to be greedy for MSI-X vectors, but it really
1240 * doesn't do us much good if we have a lot more vectors
1241 * than CPU's. So let's be conservative and only ask for
1242 * (roughly) twice the number of vectors as there are CPU's.
1243 */
1244 v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1245 v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1246
1247 adapter->msix_entries = kcalloc(v_budget,
1248 sizeof(struct msix_entry), GFP_KERNEL);
1249 if (!adapter->msix_entries) {
1250 err = -ENOMEM;
1251 goto out;
1252 }
1253
1254 for (vector = 0; vector < v_budget; vector++)
1255 adapter->msix_entries[vector].entry = vector;
1256
1257 err = i40evf_acquire_msix_vectors(adapter, v_budget);
1258
1259out:
1260 netif_set_real_num_rx_queues(adapter->netdev, pairs);
1261 netif_set_real_num_tx_queues(adapter->netdev, pairs);
1262 return err;
1263}
1264
1265/**
1266 * i40e_config_rss_aq - Configure RSS keys and lut by using AQ commands
1267 * @adapter: board private structure
1268 *
1269 * Return 0 on success, negative on failure
1270 **/
1271static int i40evf_config_rss_aq(struct i40evf_adapter *adapter)
1272{
1273 struct i40e_aqc_get_set_rss_key_data *rss_key =
1274 (struct i40e_aqc_get_set_rss_key_data *)adapter->rss_key;
1275 struct i40e_hw *hw = &adapter->hw;
1276 int ret = 0;
1277
1278 if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
1279 /* bail because we already have a command pending */
1280 dev_err(&adapter->pdev->dev, "Cannot configure RSS, command %d pending\n",
1281 adapter->current_op);
1282 return -EBUSY;
1283 }
1284
1285 ret = i40evf_aq_set_rss_key(hw, adapter->vsi.id, rss_key);
1286 if (ret) {
1287 dev_err(&adapter->pdev->dev, "Cannot set RSS key, err %s aq_err %s\n",
1288 i40evf_stat_str(hw, ret),
1289 i40evf_aq_str(hw, hw->aq.asq_last_status));
1290 return ret;
1291
1292 }
1293
1294 ret = i40evf_aq_set_rss_lut(hw, adapter->vsi.id, false,
1295 adapter->rss_lut, adapter->rss_lut_size);
1296 if (ret) {
1297 dev_err(&adapter->pdev->dev, "Cannot set RSS lut, err %s aq_err %s\n",
1298 i40evf_stat_str(hw, ret),
1299 i40evf_aq_str(hw, hw->aq.asq_last_status));
1300 }
1301
1302 return ret;
1303
1304}
1305
1306/**
1307 * i40evf_config_rss_reg - Configure RSS keys and lut by writing registers
1308 * @adapter: board private structure
1309 *
1310 * Returns 0 on success, negative on failure
1311 **/
1312static int i40evf_config_rss_reg(struct i40evf_adapter *adapter)
1313{
1314 struct i40e_hw *hw = &adapter->hw;
1315 u32 *dw;
1316 u16 i;
1317
1318 dw = (u32 *)adapter->rss_key;
1319 for (i = 0; i <= adapter->rss_key_size / 4; i++)
1320 wr32(hw, I40E_VFQF_HKEY(i), dw[i]);
1321
1322 dw = (u32 *)adapter->rss_lut;
1323 for (i = 0; i <= adapter->rss_lut_size / 4; i++)
1324 wr32(hw, I40E_VFQF_HLUT(i), dw[i]);
1325
1326 i40e_flush(hw);
1327
1328 return 0;
1329}
1330
1331/**
1332 * i40evf_config_rss - Configure RSS keys and lut
1333 * @adapter: board private structure
1334 *
1335 * Returns 0 on success, negative on failure
1336 **/
1337int i40evf_config_rss(struct i40evf_adapter *adapter)
1338{
1339
1340 if (RSS_PF(adapter)) {
1341 adapter->aq_required |= I40EVF_FLAG_AQ_SET_RSS_LUT |
1342 I40EVF_FLAG_AQ_SET_RSS_KEY;
1343 return 0;
1344 } else if (RSS_AQ(adapter)) {
1345 return i40evf_config_rss_aq(adapter);
1346 } else {
1347 return i40evf_config_rss_reg(adapter);
1348 }
1349}
1350
1351/**
1352 * i40evf_fill_rss_lut - Fill the lut with default values
1353 * @adapter: board private structure
1354 **/
1355static void i40evf_fill_rss_lut(struct i40evf_adapter *adapter)
1356{
1357 u16 i;
1358
1359 for (i = 0; i < adapter->rss_lut_size; i++)
1360 adapter->rss_lut[i] = i % adapter->num_active_queues;
1361}
1362
1363/**
1364 * i40evf_init_rss - Prepare for RSS
1365 * @adapter: board private structure
1366 *
1367 * Return 0 on success, negative on failure
1368 **/
1369static int i40evf_init_rss(struct i40evf_adapter *adapter)
1370{
1371 struct i40e_hw *hw = &adapter->hw;
1372 int ret;
1373
1374 if (!RSS_PF(adapter)) {
1375 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1376 if (adapter->vf_res->vf_offload_flags &
1377 I40E_VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2)
1378 adapter->hena = I40E_DEFAULT_RSS_HENA_EXPANDED;
1379 else
1380 adapter->hena = I40E_DEFAULT_RSS_HENA;
1381
1382 wr32(hw, I40E_VFQF_HENA(0), (u32)adapter->hena);
1383 wr32(hw, I40E_VFQF_HENA(1), (u32)(adapter->hena >> 32));
1384 }
1385
1386 i40evf_fill_rss_lut(adapter);
1387
1388 netdev_rss_key_fill((void *)adapter->rss_key, adapter->rss_key_size);
1389 ret = i40evf_config_rss(adapter);
1390
1391 return ret;
1392}
1393
1394/**
1395 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1396 * @adapter: board private structure to initialize
1397 *
1398 * We allocate one q_vector per queue interrupt. If allocation fails we
1399 * return -ENOMEM.
1400 **/
1401static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1402{
1403 int q_idx = 0, num_q_vectors;
1404 struct i40e_q_vector *q_vector;
1405
1406 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1407 adapter->q_vectors = kcalloc(num_q_vectors, sizeof(*q_vector),
1408 GFP_KERNEL);
1409 if (!adapter->q_vectors)
1410 return -ENOMEM;
1411
1412 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1413 q_vector = &adapter->q_vectors[q_idx];
1414 q_vector->adapter = adapter;
1415 q_vector->vsi = &adapter->vsi;
1416 q_vector->v_idx = q_idx;
1417 netif_napi_add(adapter->netdev, &q_vector->napi,
1418 i40evf_napi_poll, NAPI_POLL_WEIGHT);
1419 }
1420
1421 return 0;
1422}
1423
1424/**
1425 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1426 * @adapter: board private structure to initialize
1427 *
1428 * This function frees the memory allocated to the q_vectors. In addition if
1429 * NAPI is enabled it will delete any references to the NAPI struct prior
1430 * to freeing the q_vector.
1431 **/
1432static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1433{
1434 int q_idx, num_q_vectors;
1435 int napi_vectors;
1436
1437 if (!adapter->q_vectors)
1438 return;
1439
1440 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1441 napi_vectors = adapter->num_active_queues;
1442
1443 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1444 struct i40e_q_vector *q_vector = &adapter->q_vectors[q_idx];
1445 if (q_idx < napi_vectors)
1446 netif_napi_del(&q_vector->napi);
1447 }
1448 kfree(adapter->q_vectors);
1449 adapter->q_vectors = NULL;
1450}
1451
1452/**
1453 * i40evf_reset_interrupt_capability - Reset MSIX setup
1454 * @adapter: board private structure
1455 *
1456 **/
1457void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1458{
1459 if (!adapter->msix_entries)
1460 return;
1461
1462 pci_disable_msix(adapter->pdev);
1463 kfree(adapter->msix_entries);
1464 adapter->msix_entries = NULL;
1465}
1466
1467/**
1468 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1469 * @adapter: board private structure to initialize
1470 *
1471 **/
1472int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1473{
1474 int err;
1475
1476 rtnl_lock();
1477 err = i40evf_set_interrupt_capability(adapter);
1478 rtnl_unlock();
1479 if (err) {
1480 dev_err(&adapter->pdev->dev,
1481 "Unable to setup interrupt capabilities\n");
1482 goto err_set_interrupt;
1483 }
1484
1485 err = i40evf_alloc_q_vectors(adapter);
1486 if (err) {
1487 dev_err(&adapter->pdev->dev,
1488 "Unable to allocate memory for queue vectors\n");
1489 goto err_alloc_q_vectors;
1490 }
1491
1492 err = i40evf_alloc_queues(adapter);
1493 if (err) {
1494 dev_err(&adapter->pdev->dev,
1495 "Unable to allocate memory for queues\n");
1496 goto err_alloc_queues;
1497 }
1498
1499 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1500 (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1501 adapter->num_active_queues);
1502
1503 return 0;
1504err_alloc_queues:
1505 i40evf_free_q_vectors(adapter);
1506err_alloc_q_vectors:
1507 i40evf_reset_interrupt_capability(adapter);
1508err_set_interrupt:
1509 return err;
1510}
1511
1512/**
1513 * i40evf_free_rss - Free memory used by RSS structs
1514 * @adapter: board private structure
1515 **/
1516static void i40evf_free_rss(struct i40evf_adapter *adapter)
1517{
1518 kfree(adapter->rss_key);
1519 adapter->rss_key = NULL;
1520
1521 kfree(adapter->rss_lut);
1522 adapter->rss_lut = NULL;
1523}
1524
1525/**
1526 * i40evf_watchdog_timer - Periodic call-back timer
1527 * @data: pointer to adapter disguised as unsigned long
1528 **/
1529static void i40evf_watchdog_timer(unsigned long data)
1530{
1531 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1532
1533 schedule_work(&adapter->watchdog_task);
1534 /* timer will be rescheduled in watchdog task */
1535}
1536
1537/**
1538 * i40evf_watchdog_task - Periodic call-back task
1539 * @work: pointer to work_struct
1540 **/
1541static void i40evf_watchdog_task(struct work_struct *work)
1542{
1543 struct i40evf_adapter *adapter = container_of(work,
1544 struct i40evf_adapter,
1545 watchdog_task);
1546 struct i40e_hw *hw = &adapter->hw;
1547 u32 reg_val;
1548
1549 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1550 goto restart_watchdog;
1551
1552 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1553 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1554 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1555 if ((reg_val == I40E_VFR_VFACTIVE) ||
1556 (reg_val == I40E_VFR_COMPLETED)) {
1557 /* A chance for redemption! */
1558 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1559 adapter->state = __I40EVF_STARTUP;
1560 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1561 schedule_delayed_work(&adapter->init_task, 10);
1562 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1563 &adapter->crit_section);
1564 /* Don't reschedule the watchdog, since we've restarted
1565 * the init task. When init_task contacts the PF and
1566 * gets everything set up again, it'll restart the
1567 * watchdog for us. Down, boy. Sit. Stay. Woof.
1568 */
1569 return;
1570 }
1571 adapter->aq_required = 0;
1572 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1573 goto watchdog_done;
1574 }
1575
1576 if ((adapter->state < __I40EVF_DOWN) ||
1577 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1578 goto watchdog_done;
1579
1580 /* check for reset */
1581 reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
1582 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
1583 adapter->state = __I40EVF_RESETTING;
1584 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1585 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1586 schedule_work(&adapter->reset_task);
1587 adapter->aq_required = 0;
1588 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1589 goto watchdog_done;
1590 }
1591
1592 /* Process admin queue tasks. After init, everything gets done
1593 * here so we don't race on the admin queue.
1594 */
1595 if (adapter->current_op) {
1596 if (!i40evf_asq_done(hw)) {
1597 dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1598 i40evf_send_api_ver(adapter);
1599 }
1600 goto watchdog_done;
1601 }
1602 if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
1603 i40evf_send_vf_config_msg(adapter);
1604 goto watchdog_done;
1605 }
1606
1607 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1608 i40evf_disable_queues(adapter);
1609 goto watchdog_done;
1610 }
1611
1612 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1613 i40evf_map_queues(adapter);
1614 goto watchdog_done;
1615 }
1616
1617 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1618 i40evf_add_ether_addrs(adapter);
1619 goto watchdog_done;
1620 }
1621
1622 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1623 i40evf_add_vlans(adapter);
1624 goto watchdog_done;
1625 }
1626
1627 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1628 i40evf_del_ether_addrs(adapter);
1629 goto watchdog_done;
1630 }
1631
1632 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1633 i40evf_del_vlans(adapter);
1634 goto watchdog_done;
1635 }
1636
1637 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1638 i40evf_configure_queues(adapter);
1639 goto watchdog_done;
1640 }
1641
1642 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1643 i40evf_enable_queues(adapter);
1644 goto watchdog_done;
1645 }
1646
1647 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
1648 /* This message goes straight to the firmware, not the
1649 * PF, so we don't have to set current_op as we will
1650 * not get a response through the ARQ.
1651 */
1652 i40evf_init_rss(adapter);
1653 adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
1654 goto watchdog_done;
1655 }
1656 if (adapter->aq_required & I40EVF_FLAG_AQ_GET_HENA) {
1657 i40evf_get_hena(adapter);
1658 goto watchdog_done;
1659 }
1660 if (adapter->aq_required & I40EVF_FLAG_AQ_SET_HENA) {
1661 i40evf_set_hena(adapter);
1662 goto watchdog_done;
1663 }
1664 if (adapter->aq_required & I40EVF_FLAG_AQ_SET_RSS_KEY) {
1665 i40evf_set_rss_key(adapter);
1666 goto watchdog_done;
1667 }
1668 if (adapter->aq_required & I40EVF_FLAG_AQ_SET_RSS_LUT) {
1669 i40evf_set_rss_lut(adapter);
1670 goto watchdog_done;
1671 }
1672
1673 if (adapter->aq_required & I40EVF_FLAG_AQ_REQUEST_PROMISC) {
1674 i40evf_set_promiscuous(adapter, I40E_FLAG_VF_UNICAST_PROMISC |
1675 I40E_FLAG_VF_MULTICAST_PROMISC);
1676 goto watchdog_done;
1677 }
1678
1679 if (adapter->aq_required & I40EVF_FLAG_AQ_REQUEST_ALLMULTI) {
1680 i40evf_set_promiscuous(adapter, I40E_FLAG_VF_MULTICAST_PROMISC);
1681 goto watchdog_done;
1682 }
1683
1684 if ((adapter->aq_required & I40EVF_FLAG_AQ_RELEASE_PROMISC) &&
1685 (adapter->aq_required & I40EVF_FLAG_AQ_RELEASE_ALLMULTI)) {
1686 i40evf_set_promiscuous(adapter, 0);
1687 goto watchdog_done;
1688 }
1689
1690 if (adapter->state == __I40EVF_RUNNING)
1691 i40evf_request_stats(adapter);
1692watchdog_done:
1693 if (adapter->state == __I40EVF_RUNNING) {
1694 i40evf_irq_enable_queues(adapter, ~0);
1695 i40evf_fire_sw_int(adapter, 0xFF);
1696 } else {
1697 i40evf_fire_sw_int(adapter, 0x1);
1698 }
1699
1700 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1701restart_watchdog:
1702 if (adapter->state == __I40EVF_REMOVE)
1703 return;
1704 if (adapter->aq_required)
1705 mod_timer(&adapter->watchdog_timer,
1706 jiffies + msecs_to_jiffies(20));
1707 else
1708 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1709 schedule_work(&adapter->adminq_task);
1710}
1711
1712static void i40evf_disable_vf(struct i40evf_adapter *adapter)
1713{
1714 struct i40evf_mac_filter *f, *ftmp;
1715 struct i40evf_vlan_filter *fv, *fvtmp;
1716
1717 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1718
1719 if (netif_running(adapter->netdev)) {
1720 set_bit(__I40E_DOWN, &adapter->vsi.state);
1721 netif_carrier_off(adapter->netdev);
1722 netif_tx_disable(adapter->netdev);
1723 adapter->link_up = false;
1724 i40evf_napi_disable_all(adapter);
1725 i40evf_irq_disable(adapter);
1726 i40evf_free_traffic_irqs(adapter);
1727 i40evf_free_all_tx_resources(adapter);
1728 i40evf_free_all_rx_resources(adapter);
1729 }
1730
1731 /* Delete all of the filters, both MAC and VLAN. */
1732 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
1733 list_del(&f->list);
1734 kfree(f);
1735 }
1736
1737 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list, list) {
1738 list_del(&fv->list);
1739 kfree(fv);
1740 }
1741
1742 i40evf_free_misc_irq(adapter);
1743 i40evf_reset_interrupt_capability(adapter);
1744 i40evf_free_queues(adapter);
1745 i40evf_free_q_vectors(adapter);
1746 kfree(adapter->vf_res);
1747 i40evf_shutdown_adminq(&adapter->hw);
1748 adapter->netdev->flags &= ~IFF_UP;
1749 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1750 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1751 adapter->state = __I40EVF_DOWN;
1752 dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
1753}
1754
1755#define I40EVF_RESET_WAIT_MS 10
1756#define I40EVF_RESET_WAIT_COUNT 500
1757/**
1758 * i40evf_reset_task - Call-back task to handle hardware reset
1759 * @work: pointer to work_struct
1760 *
1761 * During reset we need to shut down and reinitialize the admin queue
1762 * before we can use it to communicate with the PF again. We also clear
1763 * and reinit the rings because that context is lost as well.
1764 **/
1765static void i40evf_reset_task(struct work_struct *work)
1766{
1767 struct i40evf_adapter *adapter = container_of(work,
1768 struct i40evf_adapter,
1769 reset_task);
1770 struct net_device *netdev = adapter->netdev;
1771 struct i40e_hw *hw = &adapter->hw;
1772 struct i40evf_vlan_filter *vlf;
1773 struct i40evf_mac_filter *f;
1774 u32 reg_val;
1775 int i = 0, err;
1776
1777 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1778 &adapter->crit_section))
1779 usleep_range(500, 1000);
1780
1781 i40evf_misc_irq_disable(adapter);
1782 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1783 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1784 /* Restart the AQ here. If we have been reset but didn't
1785 * detect it, or if the PF had to reinit, our AQ will be hosed.
1786 */
1787 i40evf_shutdown_adminq(hw);
1788 i40evf_init_adminq(hw);
1789 i40evf_request_reset(adapter);
1790 }
1791 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1792
1793 /* poll until we see the reset actually happen */
1794 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1795 reg_val = rd32(hw, I40E_VF_ARQLEN1) &
1796 I40E_VF_ARQLEN1_ARQENABLE_MASK;
1797 if (!reg_val)
1798 break;
1799 usleep_range(5000, 10000);
1800 }
1801 if (i == I40EVF_RESET_WAIT_COUNT) {
1802 dev_info(&adapter->pdev->dev, "Never saw reset\n");
1803 goto continue_reset; /* act like the reset happened */
1804 }
1805
1806 /* wait until the reset is complete and the PF is responding to us */
1807 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1808 /* sleep first to make sure a minimum wait time is met */
1809 msleep(I40EVF_RESET_WAIT_MS);
1810
1811 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1812 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1813 if (reg_val == I40E_VFR_VFACTIVE)
1814 break;
1815 }
1816
1817 pci_set_master(adapter->pdev);
1818
1819 if (i == I40EVF_RESET_WAIT_COUNT) {
1820 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1821 reg_val);
1822 i40evf_disable_vf(adapter);
1823 return; /* Do not attempt to reinit. It's dead, Jim. */
1824 }
1825
1826continue_reset:
1827 if (netif_running(adapter->netdev)) {
1828 netif_carrier_off(netdev);
1829 netif_tx_stop_all_queues(netdev);
1830 adapter->link_up = false;
1831 i40evf_napi_disable_all(adapter);
1832 }
1833 i40evf_irq_disable(adapter);
1834
1835 adapter->state = __I40EVF_RESETTING;
1836 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1837
1838 /* free the Tx/Rx rings and descriptors, might be better to just
1839 * re-use them sometime in the future
1840 */
1841 i40evf_free_all_rx_resources(adapter);
1842 i40evf_free_all_tx_resources(adapter);
1843
1844 /* kill and reinit the admin queue */
1845 i40evf_shutdown_adminq(hw);
1846 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1847 err = i40evf_init_adminq(hw);
1848 if (err)
1849 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1850 err);
1851
1852 adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG;
1853 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
1854
1855 /* re-add all MAC filters */
1856 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1857 f->add = true;
1858 }
1859 /* re-add all VLAN filters */
1860 list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
1861 vlf->add = true;
1862 }
1863 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1864 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1865 /* Open RDMA Client again */
1866 adapter->aq_required |= I40EVF_FLAG_SERVICE_CLIENT_REQUESTED;
1867 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1868 i40evf_misc_irq_enable(adapter);
1869
1870 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1871
1872 if (netif_running(adapter->netdev)) {
1873 /* allocate transmit descriptors */
1874 err = i40evf_setup_all_tx_resources(adapter);
1875 if (err)
1876 goto reset_err;
1877
1878 /* allocate receive descriptors */
1879 err = i40evf_setup_all_rx_resources(adapter);
1880 if (err)
1881 goto reset_err;
1882
1883 i40evf_configure(adapter);
1884
1885 i40evf_up_complete(adapter);
1886
1887 i40evf_irq_enable(adapter, true);
1888 } else {
1889 adapter->state = __I40EVF_DOWN;
1890 }
1891
1892 return;
1893reset_err:
1894 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1895 i40evf_close(adapter->netdev);
1896}
1897
1898/**
1899 * i40evf_adminq_task - worker thread to clean the admin queue
1900 * @work: pointer to work_struct containing our data
1901 **/
1902static void i40evf_adminq_task(struct work_struct *work)
1903{
1904 struct i40evf_adapter *adapter =
1905 container_of(work, struct i40evf_adapter, adminq_task);
1906 struct i40e_hw *hw = &adapter->hw;
1907 struct i40e_arq_event_info event;
1908 struct i40e_virtchnl_msg *v_msg;
1909 i40e_status ret;
1910 u32 val, oldval;
1911 u16 pending;
1912
1913 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1914 goto out;
1915
1916 event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1917 event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1918 if (!event.msg_buf)
1919 goto out;
1920
1921 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1922 do {
1923 ret = i40evf_clean_arq_element(hw, &event, &pending);
1924 if (ret || !v_msg->v_opcode)
1925 break; /* No event to process or error cleaning ARQ */
1926
1927 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1928 v_msg->v_retval, event.msg_buf,
1929 event.msg_len);
1930 if (pending != 0)
1931 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1932 } while (pending);
1933
1934 if ((adapter->flags &
1935 (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
1936 adapter->state == __I40EVF_RESETTING)
1937 goto freedom;
1938
1939 /* check for error indications */
1940 val = rd32(hw, hw->aq.arq.len);
1941 if (val == 0xdeadbeef) /* indicates device in reset */
1942 goto freedom;
1943 oldval = val;
1944 if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
1945 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1946 val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
1947 }
1948 if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
1949 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1950 val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
1951 }
1952 if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
1953 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1954 val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
1955 }
1956 if (oldval != val)
1957 wr32(hw, hw->aq.arq.len, val);
1958
1959 val = rd32(hw, hw->aq.asq.len);
1960 oldval = val;
1961 if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
1962 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1963 val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
1964 }
1965 if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
1966 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1967 val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
1968 }
1969 if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
1970 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1971 val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
1972 }
1973 if (oldval != val)
1974 wr32(hw, hw->aq.asq.len, val);
1975
1976freedom:
1977 kfree(event.msg_buf);
1978out:
1979 /* re-enable Admin queue interrupt cause */
1980 i40evf_misc_irq_enable(adapter);
1981}
1982
1983/**
1984 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1985 * @adapter: board private structure
1986 *
1987 * Free all transmit software resources
1988 **/
1989void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1990{
1991 int i;
1992
1993 if (!adapter->tx_rings)
1994 return;
1995
1996 for (i = 0; i < adapter->num_active_queues; i++)
1997 if (adapter->tx_rings[i].desc)
1998 i40evf_free_tx_resources(&adapter->tx_rings[i]);
1999}
2000
2001/**
2002 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
2003 * @adapter: board private structure
2004 *
2005 * If this function returns with an error, then it's possible one or
2006 * more of the rings is populated (while the rest are not). It is the
2007 * callers duty to clean those orphaned rings.
2008 *
2009 * Return 0 on success, negative on failure
2010 **/
2011static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
2012{
2013 int i, err = 0;
2014
2015 for (i = 0; i < adapter->num_active_queues; i++) {
2016 adapter->tx_rings[i].count = adapter->tx_desc_count;
2017 err = i40evf_setup_tx_descriptors(&adapter->tx_rings[i]);
2018 if (!err)
2019 continue;
2020 dev_err(&adapter->pdev->dev,
2021 "Allocation for Tx Queue %u failed\n", i);
2022 break;
2023 }
2024
2025 return err;
2026}
2027
2028/**
2029 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
2030 * @adapter: board private structure
2031 *
2032 * If this function returns with an error, then it's possible one or
2033 * more of the rings is populated (while the rest are not). It is the
2034 * callers duty to clean those orphaned rings.
2035 *
2036 * Return 0 on success, negative on failure
2037 **/
2038static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
2039{
2040 int i, err = 0;
2041
2042 for (i = 0; i < adapter->num_active_queues; i++) {
2043 adapter->rx_rings[i].count = adapter->rx_desc_count;
2044 err = i40evf_setup_rx_descriptors(&adapter->rx_rings[i]);
2045 if (!err)
2046 continue;
2047 dev_err(&adapter->pdev->dev,
2048 "Allocation for Rx Queue %u failed\n", i);
2049 break;
2050 }
2051 return err;
2052}
2053
2054/**
2055 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
2056 * @adapter: board private structure
2057 *
2058 * Free all receive software resources
2059 **/
2060void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
2061{
2062 int i;
2063
2064 if (!adapter->rx_rings)
2065 return;
2066
2067 for (i = 0; i < adapter->num_active_queues; i++)
2068 if (adapter->rx_rings[i].desc)
2069 i40evf_free_rx_resources(&adapter->rx_rings[i]);
2070}
2071
2072/**
2073 * i40evf_open - Called when a network interface is made active
2074 * @netdev: network interface device structure
2075 *
2076 * Returns 0 on success, negative value on failure
2077 *
2078 * The open entry point is called when a network interface is made
2079 * active by the system (IFF_UP). At this point all resources needed
2080 * for transmit and receive operations are allocated, the interrupt
2081 * handler is registered with the OS, the watchdog timer is started,
2082 * and the stack is notified that the interface is ready.
2083 **/
2084static int i40evf_open(struct net_device *netdev)
2085{
2086 struct i40evf_adapter *adapter = netdev_priv(netdev);
2087 int err;
2088
2089 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
2090 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
2091 return -EIO;
2092 }
2093
2094 if (adapter->state != __I40EVF_DOWN)
2095 return -EBUSY;
2096
2097 /* allocate transmit descriptors */
2098 err = i40evf_setup_all_tx_resources(adapter);
2099 if (err)
2100 goto err_setup_tx;
2101
2102 /* allocate receive descriptors */
2103 err = i40evf_setup_all_rx_resources(adapter);
2104 if (err)
2105 goto err_setup_rx;
2106
2107 /* clear any pending interrupts, may auto mask */
2108 err = i40evf_request_traffic_irqs(adapter, netdev->name);
2109 if (err)
2110 goto err_req_irq;
2111
2112 i40evf_add_filter(adapter, adapter->hw.mac.addr);
2113 i40evf_configure(adapter);
2114
2115 i40evf_up_complete(adapter);
2116
2117 i40evf_irq_enable(adapter, true);
2118
2119 return 0;
2120
2121err_req_irq:
2122 i40evf_down(adapter);
2123 i40evf_free_traffic_irqs(adapter);
2124err_setup_rx:
2125 i40evf_free_all_rx_resources(adapter);
2126err_setup_tx:
2127 i40evf_free_all_tx_resources(adapter);
2128
2129 return err;
2130}
2131
2132/**
2133 * i40evf_close - Disables a network interface
2134 * @netdev: network interface device structure
2135 *
2136 * Returns 0, this is not allowed to fail
2137 *
2138 * The close entry point is called when an interface is de-activated
2139 * by the OS. The hardware is still under the drivers control, but
2140 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
2141 * are freed, along with all transmit and receive resources.
2142 **/
2143static int i40evf_close(struct net_device *netdev)
2144{
2145 struct i40evf_adapter *adapter = netdev_priv(netdev);
2146
2147 if (adapter->state <= __I40EVF_DOWN_PENDING)
2148 return 0;
2149
2150
2151 set_bit(__I40E_DOWN, &adapter->vsi.state);
2152
2153 i40evf_down(adapter);
2154 adapter->state = __I40EVF_DOWN_PENDING;
2155 i40evf_free_traffic_irqs(adapter);
2156
2157 return 0;
2158}
2159
2160/**
2161 * i40evf_get_stats - Get System Network Statistics
2162 * @netdev: network interface device structure
2163 *
2164 * Returns the address of the device statistics structure.
2165 * The statistics are actually updated from the timer callback.
2166 **/
2167static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
2168{
2169 struct i40evf_adapter *adapter = netdev_priv(netdev);
2170
2171 /* only return the current stats */
2172 return &adapter->net_stats;
2173}
2174
2175/**
2176 * i40evf_change_mtu - Change the Maximum Transfer Unit
2177 * @netdev: network interface device structure
2178 * @new_mtu: new value for maximum frame size
2179 *
2180 * Returns 0 on success, negative on failure
2181 **/
2182static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
2183{
2184 struct i40evf_adapter *adapter = netdev_priv(netdev);
2185
2186 netdev->mtu = new_mtu;
2187 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
2188 schedule_work(&adapter->reset_task);
2189
2190 return 0;
2191}
2192
2193/**
2194 * i40evf_features_check - Validate encapsulated packet conforms to limits
2195 * @skb: skb buff
2196 * @netdev: This physical port's netdev
2197 * @features: Offload features that the stack believes apply
2198 **/
2199static netdev_features_t i40evf_features_check(struct sk_buff *skb,
2200 struct net_device *dev,
2201 netdev_features_t features)
2202{
2203 size_t len;
2204
2205 /* No point in doing any of this if neither checksum nor GSO are
2206 * being requested for this frame. We can rule out both by just
2207 * checking for CHECKSUM_PARTIAL
2208 */
2209 if (skb->ip_summed != CHECKSUM_PARTIAL)
2210 return features;
2211
2212 /* We cannot support GSO if the MSS is going to be less than
2213 * 64 bytes. If it is then we need to drop support for GSO.
2214 */
2215 if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_size < 64))
2216 features &= ~NETIF_F_GSO_MASK;
2217
2218 /* MACLEN can support at most 63 words */
2219 len = skb_network_header(skb) - skb->data;
2220 if (len & ~(63 * 2))
2221 goto out_err;
2222
2223 /* IPLEN and EIPLEN can support at most 127 dwords */
2224 len = skb_transport_header(skb) - skb_network_header(skb);
2225 if (len & ~(127 * 4))
2226 goto out_err;
2227
2228 if (skb->encapsulation) {
2229 /* L4TUNLEN can support 127 words */
2230 len = skb_inner_network_header(skb) - skb_transport_header(skb);
2231 if (len & ~(127 * 2))
2232 goto out_err;
2233
2234 /* IPLEN can support at most 127 dwords */
2235 len = skb_inner_transport_header(skb) -
2236 skb_inner_network_header(skb);
2237 if (len & ~(127 * 4))
2238 goto out_err;
2239 }
2240
2241 /* No need to validate L4LEN as TCP is the only protocol with a
2242 * a flexible value and we support all possible values supported
2243 * by TCP, which is at most 15 dwords
2244 */
2245
2246 return features;
2247out_err:
2248 return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
2249}
2250
2251#define I40EVF_VLAN_FEATURES (NETIF_F_HW_VLAN_CTAG_TX |\
2252 NETIF_F_HW_VLAN_CTAG_RX |\
2253 NETIF_F_HW_VLAN_CTAG_FILTER)
2254
2255/**
2256 * i40evf_fix_features - fix up the netdev feature bits
2257 * @netdev: our net device
2258 * @features: desired feature bits
2259 *
2260 * Returns fixed-up features bits
2261 **/
2262static netdev_features_t i40evf_fix_features(struct net_device *netdev,
2263 netdev_features_t features)
2264{
2265 struct i40evf_adapter *adapter = netdev_priv(netdev);
2266
2267 features &= ~I40EVF_VLAN_FEATURES;
2268 if (adapter->vf_res->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_VLAN)
2269 features |= I40EVF_VLAN_FEATURES;
2270 return features;
2271}
2272
2273static const struct net_device_ops i40evf_netdev_ops = {
2274 .ndo_open = i40evf_open,
2275 .ndo_stop = i40evf_close,
2276 .ndo_start_xmit = i40evf_xmit_frame,
2277 .ndo_get_stats = i40evf_get_stats,
2278 .ndo_set_rx_mode = i40evf_set_rx_mode,
2279 .ndo_validate_addr = eth_validate_addr,
2280 .ndo_set_mac_address = i40evf_set_mac,
2281 .ndo_change_mtu = i40evf_change_mtu,
2282 .ndo_tx_timeout = i40evf_tx_timeout,
2283 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
2284 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
2285 .ndo_features_check = i40evf_features_check,
2286 .ndo_fix_features = i40evf_fix_features,
2287#ifdef CONFIG_NET_POLL_CONTROLLER
2288 .ndo_poll_controller = i40evf_netpoll,
2289#endif
2290};
2291
2292/**
2293 * i40evf_check_reset_complete - check that VF reset is complete
2294 * @hw: pointer to hw struct
2295 *
2296 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
2297 **/
2298static int i40evf_check_reset_complete(struct i40e_hw *hw)
2299{
2300 u32 rstat;
2301 int i;
2302
2303 for (i = 0; i < 100; i++) {
2304 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
2305 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
2306 if ((rstat == I40E_VFR_VFACTIVE) ||
2307 (rstat == I40E_VFR_COMPLETED))
2308 return 0;
2309 usleep_range(10, 20);
2310 }
2311 return -EBUSY;
2312}
2313
2314/**
2315 * i40evf_process_config - Process the config information we got from the PF
2316 * @adapter: board private structure
2317 *
2318 * Verify that we have a valid config struct, and set up our netdev features
2319 * and our VSI struct.
2320 **/
2321int i40evf_process_config(struct i40evf_adapter *adapter)
2322{
2323 struct i40e_virtchnl_vf_resource *vfres = adapter->vf_res;
2324 struct net_device *netdev = adapter->netdev;
2325 struct i40e_vsi *vsi = &adapter->vsi;
2326 int i;
2327
2328 /* got VF config message back from PF, now we can parse it */
2329 for (i = 0; i < vfres->num_vsis; i++) {
2330 if (vfres->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2331 adapter->vsi_res = &vfres->vsi_res[i];
2332 }
2333 if (!adapter->vsi_res) {
2334 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
2335 return -ENODEV;
2336 }
2337
2338 netdev->hw_enc_features |= NETIF_F_SG |
2339 NETIF_F_IP_CSUM |
2340 NETIF_F_IPV6_CSUM |
2341 NETIF_F_HIGHDMA |
2342 NETIF_F_SOFT_FEATURES |
2343 NETIF_F_TSO |
2344 NETIF_F_TSO_ECN |
2345 NETIF_F_TSO6 |
2346 NETIF_F_GSO_GRE |
2347 NETIF_F_GSO_GRE_CSUM |
2348 NETIF_F_GSO_IPXIP4 |
2349 NETIF_F_GSO_IPXIP6 |
2350 NETIF_F_GSO_UDP_TUNNEL |
2351 NETIF_F_GSO_UDP_TUNNEL_CSUM |
2352 NETIF_F_GSO_PARTIAL |
2353 NETIF_F_SCTP_CRC |
2354 NETIF_F_RXHASH |
2355 NETIF_F_RXCSUM |
2356 0;
2357
2358 if (!(adapter->flags & I40EVF_FLAG_OUTER_UDP_CSUM_CAPABLE))
2359 netdev->gso_partial_features |= NETIF_F_GSO_UDP_TUNNEL_CSUM;
2360
2361 netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
2362
2363 /* record features VLANs can make use of */
2364 netdev->vlan_features |= netdev->hw_enc_features |
2365 NETIF_F_TSO_MANGLEID;
2366
2367 /* Write features and hw_features separately to avoid polluting
2368 * with, or dropping, features that are set when we registgered.
2369 */
2370 netdev->hw_features |= netdev->hw_enc_features;
2371
2372 netdev->features |= netdev->hw_enc_features | I40EVF_VLAN_FEATURES;
2373 netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
2374
2375 /* disable VLAN features if not supported */
2376 if (!(vfres->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_VLAN))
2377 netdev->features ^= I40EVF_VLAN_FEATURES;
2378
2379 adapter->vsi.id = adapter->vsi_res->vsi_id;
2380
2381 adapter->vsi.back = adapter;
2382 adapter->vsi.base_vector = 1;
2383 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2384 vsi->netdev = adapter->netdev;
2385 vsi->qs_handle = adapter->vsi_res->qset_handle;
2386 if (vfres->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_RSS_PF) {
2387 adapter->rss_key_size = vfres->rss_key_size;
2388 adapter->rss_lut_size = vfres->rss_lut_size;
2389 } else {
2390 adapter->rss_key_size = I40EVF_HKEY_ARRAY_SIZE;
2391 adapter->rss_lut_size = I40EVF_HLUT_ARRAY_SIZE;
2392 }
2393
2394 return 0;
2395}
2396
2397/**
2398 * i40evf_init_task - worker thread to perform delayed initialization
2399 * @work: pointer to work_struct containing our data
2400 *
2401 * This task completes the work that was begun in probe. Due to the nature
2402 * of VF-PF communications, we may need to wait tens of milliseconds to get
2403 * responses back from the PF. Rather than busy-wait in probe and bog down the
2404 * whole system, we'll do it in a task so we can sleep.
2405 * This task only runs during driver init. Once we've established
2406 * communications with the PF driver and set up our netdev, the watchdog
2407 * takes over.
2408 **/
2409static void i40evf_init_task(struct work_struct *work)
2410{
2411 struct i40evf_adapter *adapter = container_of(work,
2412 struct i40evf_adapter,
2413 init_task.work);
2414 struct net_device *netdev = adapter->netdev;
2415 struct i40e_hw *hw = &adapter->hw;
2416 struct pci_dev *pdev = adapter->pdev;
2417 int err, bufsz;
2418
2419 switch (adapter->state) {
2420 case __I40EVF_STARTUP:
2421 /* driver loaded, probe complete */
2422 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2423 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2424 err = i40e_set_mac_type(hw);
2425 if (err) {
2426 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2427 err);
2428 goto err;
2429 }
2430 err = i40evf_check_reset_complete(hw);
2431 if (err) {
2432 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2433 err);
2434 goto err;
2435 }
2436 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2437 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2438 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2439 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2440
2441 err = i40evf_init_adminq(hw);
2442 if (err) {
2443 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2444 err);
2445 goto err;
2446 }
2447 err = i40evf_send_api_ver(adapter);
2448 if (err) {
2449 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2450 i40evf_shutdown_adminq(hw);
2451 goto err;
2452 }
2453 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2454 goto restart;
2455 case __I40EVF_INIT_VERSION_CHECK:
2456 if (!i40evf_asq_done(hw)) {
2457 dev_err(&pdev->dev, "Admin queue command never completed\n");
2458 i40evf_shutdown_adminq(hw);
2459 adapter->state = __I40EVF_STARTUP;
2460 goto err;
2461 }
2462
2463 /* aq msg sent, awaiting reply */
2464 err = i40evf_verify_api_ver(adapter);
2465 if (err) {
2466 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2467 err = i40evf_send_api_ver(adapter);
2468 else
2469 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
2470 adapter->pf_version.major,
2471 adapter->pf_version.minor,
2472 I40E_VIRTCHNL_VERSION_MAJOR,
2473 I40E_VIRTCHNL_VERSION_MINOR);
2474 goto err;
2475 }
2476 err = i40evf_send_vf_config_msg(adapter);
2477 if (err) {
2478 dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2479 err);
2480 goto err;
2481 }
2482 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2483 goto restart;
2484 case __I40EVF_INIT_GET_RESOURCES:
2485 /* aq msg sent, awaiting reply */
2486 if (!adapter->vf_res) {
2487 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2488 (I40E_MAX_VF_VSI *
2489 sizeof(struct i40e_virtchnl_vsi_resource));
2490 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2491 if (!adapter->vf_res)
2492 goto err;
2493 }
2494 err = i40evf_get_vf_config(adapter);
2495 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2496 err = i40evf_send_vf_config_msg(adapter);
2497 goto err;
2498 } else if (err == I40E_ERR_PARAM) {
2499 /* We only get ERR_PARAM if the device is in a very bad
2500 * state or if we've been disabled for previous bad
2501 * behavior. Either way, we're done now.
2502 */
2503 i40evf_shutdown_adminq(hw);
2504 dev_err(&pdev->dev, "Unable to get VF config due to PF error condition, not retrying\n");
2505 return;
2506 }
2507 if (err) {
2508 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2509 err);
2510 goto err_alloc;
2511 }
2512 adapter->state = __I40EVF_INIT_SW;
2513 break;
2514 default:
2515 goto err_alloc;
2516 }
2517
2518 if (hw->mac.type == I40E_MAC_X722_VF)
2519 adapter->flags |= I40EVF_FLAG_OUTER_UDP_CSUM_CAPABLE;
2520
2521 if (i40evf_process_config(adapter))
2522 goto err_alloc;
2523 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
2524
2525 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2526
2527 netdev->netdev_ops = &i40evf_netdev_ops;
2528 i40evf_set_ethtool_ops(netdev);
2529 netdev->watchdog_timeo = 5 * HZ;
2530
2531 /* MTU range: 68 - 9710 */
2532 netdev->min_mtu = ETH_MIN_MTU;
2533 netdev->max_mtu = I40E_MAX_RXBUFFER - (ETH_HLEN + ETH_FCS_LEN);
2534
2535 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2536 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2537 adapter->hw.mac.addr);
2538 eth_hw_addr_random(netdev);
2539 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
2540 } else {
2541 adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF;
2542 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2543 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2544 }
2545
2546 init_timer(&adapter->watchdog_timer);
2547 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2548 adapter->watchdog_timer.data = (unsigned long)adapter;
2549 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2550
2551 adapter->num_active_queues = min_t(int,
2552 adapter->vsi_res->num_queue_pairs,
2553 (int)(num_online_cpus()));
2554 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2555 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2556 err = i40evf_init_interrupt_scheme(adapter);
2557 if (err)
2558 goto err_sw_init;
2559 i40evf_map_rings_to_vectors(adapter);
2560 if (adapter->vf_res->vf_offload_flags &
2561 I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
2562 adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
2563
2564 err = i40evf_request_misc_irq(adapter);
2565 if (err)
2566 goto err_sw_init;
2567
2568 netif_carrier_off(netdev);
2569 adapter->link_up = false;
2570
2571 if (!adapter->netdev_registered) {
2572 err = register_netdev(netdev);
2573 if (err)
2574 goto err_register;
2575 }
2576
2577 adapter->netdev_registered = true;
2578
2579 netif_tx_stop_all_queues(netdev);
2580
2581 dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2582 if (netdev->features & NETIF_F_GRO)
2583 dev_info(&pdev->dev, "GRO is enabled\n");
2584
2585 adapter->state = __I40EVF_DOWN;
2586 set_bit(__I40E_DOWN, &adapter->vsi.state);
2587 i40evf_misc_irq_enable(adapter);
2588
2589 adapter->rss_key = kzalloc(adapter->rss_key_size, GFP_KERNEL);
2590 adapter->rss_lut = kzalloc(adapter->rss_lut_size, GFP_KERNEL);
2591 if (!adapter->rss_key || !adapter->rss_lut)
2592 goto err_mem;
2593
2594 if (RSS_AQ(adapter)) {
2595 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
2596 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
2597 } else {
2598 i40evf_init_rss(adapter);
2599 }
2600 return;
2601restart:
2602 schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
2603 return;
2604err_mem:
2605 i40evf_free_rss(adapter);
2606err_register:
2607 i40evf_free_misc_irq(adapter);
2608err_sw_init:
2609 i40evf_reset_interrupt_capability(adapter);
2610err_alloc:
2611 kfree(adapter->vf_res);
2612 adapter->vf_res = NULL;
2613err:
2614 /* Things went into the weeds, so try again later */
2615 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2616 dev_err(&pdev->dev, "Failed to communicate with PF; waiting before retry\n");
2617 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2618 i40evf_shutdown_adminq(hw);
2619 adapter->state = __I40EVF_STARTUP;
2620 schedule_delayed_work(&adapter->init_task, HZ * 5);
2621 return;
2622 }
2623 schedule_delayed_work(&adapter->init_task, HZ);
2624}
2625
2626/**
2627 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2628 * @pdev: pci device structure
2629 **/
2630static void i40evf_shutdown(struct pci_dev *pdev)
2631{
2632 struct net_device *netdev = pci_get_drvdata(pdev);
2633 struct i40evf_adapter *adapter = netdev_priv(netdev);
2634
2635 netif_device_detach(netdev);
2636
2637 if (netif_running(netdev))
2638 i40evf_close(netdev);
2639
2640 /* Prevent the watchdog from running. */
2641 adapter->state = __I40EVF_REMOVE;
2642 adapter->aq_required = 0;
2643
2644#ifdef CONFIG_PM
2645 pci_save_state(pdev);
2646
2647#endif
2648 pci_disable_device(pdev);
2649}
2650
2651/**
2652 * i40evf_probe - Device Initialization Routine
2653 * @pdev: PCI device information struct
2654 * @ent: entry in i40evf_pci_tbl
2655 *
2656 * Returns 0 on success, negative on failure
2657 *
2658 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2659 * The OS initialization, configuring of the adapter private structure,
2660 * and a hardware reset occur.
2661 **/
2662static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2663{
2664 struct net_device *netdev;
2665 struct i40evf_adapter *adapter = NULL;
2666 struct i40e_hw *hw = NULL;
2667 int err;
2668
2669 err = pci_enable_device(pdev);
2670 if (err)
2671 return err;
2672
2673 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2674 if (err) {
2675 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2676 if (err) {
2677 dev_err(&pdev->dev,
2678 "DMA configuration failed: 0x%x\n", err);
2679 goto err_dma;
2680 }
2681 }
2682
2683 err = pci_request_regions(pdev, i40evf_driver_name);
2684 if (err) {
2685 dev_err(&pdev->dev,
2686 "pci_request_regions failed 0x%x\n", err);
2687 goto err_pci_reg;
2688 }
2689
2690 pci_enable_pcie_error_reporting(pdev);
2691
2692 pci_set_master(pdev);
2693
2694 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter), MAX_QUEUES);
2695 if (!netdev) {
2696 err = -ENOMEM;
2697 goto err_alloc_etherdev;
2698 }
2699
2700 SET_NETDEV_DEV(netdev, &pdev->dev);
2701
2702 pci_set_drvdata(pdev, netdev);
2703 adapter = netdev_priv(netdev);
2704
2705 adapter->netdev = netdev;
2706 adapter->pdev = pdev;
2707
2708 hw = &adapter->hw;
2709 hw->back = adapter;
2710
2711 adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2712 adapter->state = __I40EVF_STARTUP;
2713
2714 /* Call save state here because it relies on the adapter struct. */
2715 pci_save_state(pdev);
2716
2717 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2718 pci_resource_len(pdev, 0));
2719 if (!hw->hw_addr) {
2720 err = -EIO;
2721 goto err_ioremap;
2722 }
2723 hw->vendor_id = pdev->vendor;
2724 hw->device_id = pdev->device;
2725 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2726 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2727 hw->subsystem_device_id = pdev->subsystem_device;
2728 hw->bus.device = PCI_SLOT(pdev->devfn);
2729 hw->bus.func = PCI_FUNC(pdev->devfn);
2730
2731 /* set up the locks for the AQ, do this only once in probe
2732 * and destroy them only once in remove
2733 */
2734 mutex_init(&hw->aq.asq_mutex);
2735 mutex_init(&hw->aq.arq_mutex);
2736
2737 INIT_LIST_HEAD(&adapter->mac_filter_list);
2738 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2739
2740 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2741 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2742 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2743 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2744 schedule_delayed_work(&adapter->init_task,
2745 msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
2746
2747 return 0;
2748
2749err_ioremap:
2750 free_netdev(netdev);
2751err_alloc_etherdev:
2752 pci_release_regions(pdev);
2753err_pci_reg:
2754err_dma:
2755 pci_disable_device(pdev);
2756 return err;
2757}
2758
2759#ifdef CONFIG_PM
2760/**
2761 * i40evf_suspend - Power management suspend routine
2762 * @pdev: PCI device information struct
2763 * @state: unused
2764 *
2765 * Called when the system (VM) is entering sleep/suspend.
2766 **/
2767static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2768{
2769 struct net_device *netdev = pci_get_drvdata(pdev);
2770 struct i40evf_adapter *adapter = netdev_priv(netdev);
2771 int retval = 0;
2772
2773 netif_device_detach(netdev);
2774
2775 if (netif_running(netdev)) {
2776 rtnl_lock();
2777 i40evf_down(adapter);
2778 rtnl_unlock();
2779 }
2780 i40evf_free_misc_irq(adapter);
2781 i40evf_reset_interrupt_capability(adapter);
2782
2783 retval = pci_save_state(pdev);
2784 if (retval)
2785 return retval;
2786
2787 pci_disable_device(pdev);
2788
2789 return 0;
2790}
2791
2792/**
2793 * i40evf_resume - Power management resume routine
2794 * @pdev: PCI device information struct
2795 *
2796 * Called when the system (VM) is resumed from sleep/suspend.
2797 **/
2798static int i40evf_resume(struct pci_dev *pdev)
2799{
2800 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2801 struct net_device *netdev = adapter->netdev;
2802 u32 err;
2803
2804 pci_set_power_state(pdev, PCI_D0);
2805 pci_restore_state(pdev);
2806 /* pci_restore_state clears dev->state_saved so call
2807 * pci_save_state to restore it.
2808 */
2809 pci_save_state(pdev);
2810
2811 err = pci_enable_device_mem(pdev);
2812 if (err) {
2813 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2814 return err;
2815 }
2816 pci_set_master(pdev);
2817
2818 rtnl_lock();
2819 err = i40evf_set_interrupt_capability(adapter);
2820 if (err) {
2821 rtnl_unlock();
2822 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2823 return err;
2824 }
2825 err = i40evf_request_misc_irq(adapter);
2826 rtnl_unlock();
2827 if (err) {
2828 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2829 return err;
2830 }
2831
2832 schedule_work(&adapter->reset_task);
2833
2834 netif_device_attach(netdev);
2835
2836 return err;
2837}
2838
2839#endif /* CONFIG_PM */
2840/**
2841 * i40evf_remove - Device Removal Routine
2842 * @pdev: PCI device information struct
2843 *
2844 * i40evf_remove is called by the PCI subsystem to alert the driver
2845 * that it should release a PCI device. The could be caused by a
2846 * Hot-Plug event, or because the driver is going to be removed from
2847 * memory.
2848 **/
2849static void i40evf_remove(struct pci_dev *pdev)
2850{
2851 struct net_device *netdev = pci_get_drvdata(pdev);
2852 struct i40evf_adapter *adapter = netdev_priv(netdev);
2853 struct i40evf_mac_filter *f, *ftmp;
2854 struct i40e_hw *hw = &adapter->hw;
2855
2856 cancel_delayed_work_sync(&adapter->init_task);
2857 cancel_work_sync(&adapter->reset_task);
2858
2859 if (adapter->netdev_registered) {
2860 unregister_netdev(netdev);
2861 adapter->netdev_registered = false;
2862 }
2863
2864 /* Shut down all the garbage mashers on the detention level */
2865 adapter->state = __I40EVF_REMOVE;
2866 adapter->aq_required = 0;
2867 i40evf_request_reset(adapter);
2868 msleep(50);
2869 /* If the FW isn't responding, kick it once, but only once. */
2870 if (!i40evf_asq_done(hw)) {
2871 i40evf_request_reset(adapter);
2872 msleep(50);
2873 }
2874
2875 i40evf_misc_irq_disable(adapter);
2876 i40evf_free_misc_irq(adapter);
2877 i40evf_reset_interrupt_capability(adapter);
2878 i40evf_free_q_vectors(adapter);
2879
2880 if (adapter->watchdog_timer.function)
2881 del_timer_sync(&adapter->watchdog_timer);
2882
2883 flush_scheduled_work();
2884
2885 i40evf_free_rss(adapter);
2886
2887 if (hw->aq.asq.count)
2888 i40evf_shutdown_adminq(hw);
2889
2890 /* destroy the locks only once, here */
2891 mutex_destroy(&hw->aq.arq_mutex);
2892 mutex_destroy(&hw->aq.asq_mutex);
2893
2894 iounmap(hw->hw_addr);
2895 pci_release_regions(pdev);
2896 i40evf_free_all_tx_resources(adapter);
2897 i40evf_free_all_rx_resources(adapter);
2898 i40evf_free_queues(adapter);
2899 kfree(adapter->vf_res);
2900 /* If we got removed before an up/down sequence, we've got a filter
2901 * hanging out there that we need to get rid of.
2902 */
2903 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2904 list_del(&f->list);
2905 kfree(f);
2906 }
2907 list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2908 list_del(&f->list);
2909 kfree(f);
2910 }
2911
2912 free_netdev(netdev);
2913
2914 pci_disable_pcie_error_reporting(pdev);
2915
2916 pci_disable_device(pdev);
2917}
2918
2919static struct pci_driver i40evf_driver = {
2920 .name = i40evf_driver_name,
2921 .id_table = i40evf_pci_tbl,
2922 .probe = i40evf_probe,
2923 .remove = i40evf_remove,
2924#ifdef CONFIG_PM
2925 .suspend = i40evf_suspend,
2926 .resume = i40evf_resume,
2927#endif
2928 .shutdown = i40evf_shutdown,
2929};
2930
2931/**
2932 * i40e_init_module - Driver Registration Routine
2933 *
2934 * i40e_init_module is the first routine called when the driver is
2935 * loaded. All it does is register with the PCI subsystem.
2936 **/
2937static int __init i40evf_init_module(void)
2938{
2939 int ret;
2940
2941 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2942 i40evf_driver_version);
2943
2944 pr_info("%s\n", i40evf_copyright);
2945
2946 i40evf_wq = alloc_workqueue("%s", WQ_UNBOUND | WQ_MEM_RECLAIM, 1,
2947 i40evf_driver_name);
2948 if (!i40evf_wq) {
2949 pr_err("%s: Failed to create workqueue\n", i40evf_driver_name);
2950 return -ENOMEM;
2951 }
2952 ret = pci_register_driver(&i40evf_driver);
2953 return ret;
2954}
2955
2956module_init(i40evf_init_module);
2957
2958/**
2959 * i40e_exit_module - Driver Exit Cleanup Routine
2960 *
2961 * i40e_exit_module is called just before the driver is removed
2962 * from memory.
2963 **/
2964static void __exit i40evf_exit_module(void)
2965{
2966 pci_unregister_driver(&i40evf_driver);
2967 destroy_workqueue(i40evf_wq);
2968}
2969
2970module_exit(i40evf_exit_module);
2971
2972/* i40evf_main.c */