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x86/mm/pat: Don't report PAT on CPUs that don't support it
[linux/fpc-iii.git] / drivers / net / ethernet / intel / i40evf / i40evf_main.c
blobf35dcaac5bb7bd9bf86412c1bb40f8e971d086c7
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"
29 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter);
30 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter);
31 static int i40evf_close(struct net_device *netdev);
32
33 char i40evf_driver_name[] = "i40evf";
34 static 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 27
42 #define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
43 __stringify(DRV_VERSION_MINOR) "." \
44 __stringify(DRV_VERSION_BUILD) \
45 DRV_KERN
46 const char i40evf_driver_version[] = DRV_VERSION;
47 static 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 */
58 static 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 /* required last entry */
63 {0, }
64 };
65
66 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
67
68 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
69 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
70 MODULE_LICENSE("GPL");
71 MODULE_VERSION(DRV_VERSION);
72
73 static struct workqueue_struct *i40evf_wq;
74
75 /**
76 * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
77 * @hw: pointer to the HW structure
78 * @mem: ptr to mem struct to fill out
79 * @size: size of memory requested
80 * @alignment: what to align the allocation to
81 **/
82 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
83 struct i40e_dma_mem *mem,
84 u64 size, u32 alignment)
85 {
86 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
87
88 if (!mem)
89 return I40E_ERR_PARAM;
90
91 mem->size = ALIGN(size, alignment);
92 mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
93 (dma_addr_t *)&mem->pa, GFP_KERNEL);
94 if (mem->va)
95 return 0;
96 else
97 return I40E_ERR_NO_MEMORY;
98 }
99
100 /**
101 * i40evf_free_dma_mem_d - OS specific memory free for shared code
102 * @hw: pointer to the HW structure
103 * @mem: ptr to mem struct to free
104 **/
105 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
106 {
107 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
108
109 if (!mem || !mem->va)
110 return I40E_ERR_PARAM;
111 dma_free_coherent(&adapter->pdev->dev, mem->size,
112 mem->va, (dma_addr_t)mem->pa);
113 return 0;
114 }
115
116 /**
117 * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
118 * @hw: pointer to the HW structure
119 * @mem: ptr to mem struct to fill out
120 * @size: size of memory requested
121 **/
122 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
123 struct i40e_virt_mem *mem, u32 size)
124 {
125 if (!mem)
126 return I40E_ERR_PARAM;
127
128 mem->size = size;
129 mem->va = kzalloc(size, GFP_KERNEL);
130
131 if (mem->va)
132 return 0;
133 else
134 return I40E_ERR_NO_MEMORY;
135 }
136
137 /**
138 * i40evf_free_virt_mem_d - OS specific memory free for shared code
139 * @hw: pointer to the HW structure
140 * @mem: ptr to mem struct to free
141 **/
142 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
143 struct i40e_virt_mem *mem)
144 {
145 if (!mem)
146 return I40E_ERR_PARAM;
147
148 /* it's ok to kfree a NULL pointer */
149 kfree(mem->va);
150
151 return 0;
152 }
153
154 /**
155 * i40evf_debug_d - OS dependent version of debug printing
156 * @hw: pointer to the HW structure
157 * @mask: debug level mask
158 * @fmt_str: printf-type format description
159 **/
160 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
161 {
162 char buf[512];
163 va_list argptr;
164
165 if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
166 return;
167
168 va_start(argptr, fmt_str);
169 vsnprintf(buf, sizeof(buf), fmt_str, argptr);
170 va_end(argptr);
171
172 /* the debug string is already formatted with a newline */
173 pr_info("%s", buf);
174 }
175
176 /**
177 * i40evf_schedule_reset - Set the flags and schedule a reset event
178 * @adapter: board private structure
179 **/
180 void i40evf_schedule_reset(struct i40evf_adapter *adapter)
181 {
182 if (!(adapter->flags &
183 (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED))) {
184 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
185 schedule_work(&adapter->reset_task);
186 }
187 }
188
189 /**
190 * i40evf_tx_timeout - Respond to a Tx Hang
191 * @netdev: network interface device structure
192 **/
193 static void i40evf_tx_timeout(struct net_device *netdev)
194 {
195 struct i40evf_adapter *adapter = netdev_priv(netdev);
196
197 adapter->tx_timeout_count++;
198 i40evf_schedule_reset(adapter);
199 }
200
201 /**
202 * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
203 * @adapter: board private structure
204 **/
205 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
206 {
207 struct i40e_hw *hw = &adapter->hw;
208
209 if (!adapter->msix_entries)
210 return;
211
212 wr32(hw, I40E_VFINT_DYN_CTL01, 0);
213
214 /* read flush */
215 rd32(hw, I40E_VFGEN_RSTAT);
216
217 synchronize_irq(adapter->msix_entries[0].vector);
218 }
219
220 /**
221 * i40evf_misc_irq_enable - Enable default interrupt generation settings
222 * @adapter: board private structure
223 **/
224 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
225 {
226 struct i40e_hw *hw = &adapter->hw;
227
228 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
229 I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
230 wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA1_ADMINQ_MASK);
231
232 /* read flush */
233 rd32(hw, I40E_VFGEN_RSTAT);
234 }
235
236 /**
237 * i40evf_irq_disable - Mask off interrupt generation on the NIC
238 * @adapter: board private structure
239 **/
240 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
241 {
242 int i;
243 struct i40e_hw *hw = &adapter->hw;
244
245 if (!adapter->msix_entries)
246 return;
247
248 for (i = 1; i < adapter->num_msix_vectors; i++) {
249 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
250 synchronize_irq(adapter->msix_entries[i].vector);
251 }
252 /* read flush */
253 rd32(hw, I40E_VFGEN_RSTAT);
254 }
255
256 /**
257 * i40evf_irq_enable_queues - Enable interrupt for specified queues
258 * @adapter: board private structure
259 * @mask: bitmap of queues to enable
260 **/
261 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
262 {
263 struct i40e_hw *hw = &adapter->hw;
264 int i;
265
266 for (i = 1; i < adapter->num_msix_vectors; i++) {
267 if (mask & BIT(i - 1)) {
268 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
269 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
270 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
271 I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK);
272 }
273 }
274 }
275
276 /**
277 * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
278 * @adapter: board private structure
279 * @mask: bitmap of vectors to trigger
280 **/
281 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
282 {
283 struct i40e_hw *hw = &adapter->hw;
284 int i;
285 u32 dyn_ctl;
286
287 if (mask & 1) {
288 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
289 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
290 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
291 I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
292 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
293 }
294 for (i = 1; i < adapter->num_msix_vectors; i++) {
295 if (mask & BIT(i)) {
296 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
297 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
298 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
299 I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
300 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
301 }
302 }
303 }
304
305 /**
306 * i40evf_irq_enable - Enable default interrupt generation settings
307 * @adapter: board private structure
308 * @flush: boolean value whether to run rd32()
309 **/
310 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
311 {
312 struct i40e_hw *hw = &adapter->hw;
313
314 i40evf_misc_irq_enable(adapter);
315 i40evf_irq_enable_queues(adapter, ~0);
316
317 if (flush)
318 rd32(hw, I40E_VFGEN_RSTAT);
319 }
320
321 /**
322 * i40evf_msix_aq - Interrupt handler for vector 0
323 * @irq: interrupt number
324 * @data: pointer to netdev
325 **/
326 static irqreturn_t i40evf_msix_aq(int irq, void *data)
327 {
328 struct net_device *netdev = data;
329 struct i40evf_adapter *adapter = netdev_priv(netdev);
330 struct i40e_hw *hw = &adapter->hw;
331 u32 val;
332
333 /* handle non-queue interrupts, these reads clear the registers */
334 val = rd32(hw, I40E_VFINT_ICR01);
335 val = rd32(hw, I40E_VFINT_ICR0_ENA1);
336
337 val = rd32(hw, I40E_VFINT_DYN_CTL01) |
338 I40E_VFINT_DYN_CTL01_CLEARPBA_MASK;
339 wr32(hw, I40E_VFINT_DYN_CTL01, val);
340
341 /* schedule work on the private workqueue */
342 schedule_work(&adapter->adminq_task);
343
344 return IRQ_HANDLED;
345 }
346
347 /**
348 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
349 * @irq: interrupt number
350 * @data: pointer to a q_vector
351 **/
352 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
353 {
354 struct i40e_q_vector *q_vector = data;
355
356 if (!q_vector->tx.ring && !q_vector->rx.ring)
357 return IRQ_HANDLED;
358
359 napi_schedule_irqoff(&q_vector->napi);
360
361 return IRQ_HANDLED;
362 }
363
364 /**
365 * i40evf_map_vector_to_rxq - associate irqs with rx queues
366 * @adapter: board private structure
367 * @v_idx: interrupt number
368 * @r_idx: queue number
369 **/
370 static void
371 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
372 {
373 struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
374 struct i40e_ring *rx_ring = &adapter->rx_rings[r_idx];
375 struct i40e_hw *hw = &adapter->hw;
376
377 rx_ring->q_vector = q_vector;
378 rx_ring->next = q_vector->rx.ring;
379 rx_ring->vsi = &adapter->vsi;
380 q_vector->rx.ring = rx_ring;
381 q_vector->rx.count++;
382 q_vector->rx.latency_range = I40E_LOW_LATENCY;
383 q_vector->rx.itr = ITR_TO_REG(rx_ring->rx_itr_setting);
384 q_vector->ring_mask |= BIT(r_idx);
385 q_vector->itr_countdown = ITR_COUNTDOWN_START;
386 wr32(hw, I40E_VFINT_ITRN1(I40E_RX_ITR, v_idx - 1), q_vector->rx.itr);
387 }
388
389 /**
390 * i40evf_map_vector_to_txq - associate irqs with tx queues
391 * @adapter: board private structure
392 * @v_idx: interrupt number
393 * @t_idx: queue number
394 **/
395 static void
396 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
397 {
398 struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
399 struct i40e_ring *tx_ring = &adapter->tx_rings[t_idx];
400 struct i40e_hw *hw = &adapter->hw;
401
402 tx_ring->q_vector = q_vector;
403 tx_ring->next = q_vector->tx.ring;
404 tx_ring->vsi = &adapter->vsi;
405 q_vector->tx.ring = tx_ring;
406 q_vector->tx.count++;
407 q_vector->tx.latency_range = I40E_LOW_LATENCY;
408 q_vector->tx.itr = ITR_TO_REG(tx_ring->tx_itr_setting);
409 q_vector->itr_countdown = ITR_COUNTDOWN_START;
410 q_vector->num_ringpairs++;
411 wr32(hw, I40E_VFINT_ITRN1(I40E_TX_ITR, v_idx - 1), q_vector->tx.itr);
412 }
413
414 /**
415 * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
416 * @adapter: board private structure to initialize
417 *
418 * This function maps descriptor rings to the queue-specific vectors
419 * we were allotted through the MSI-X enabling code. Ideally, we'd have
420 * one vector per ring/queue, but on a constrained vector budget, we
421 * group the rings as "efficiently" as possible. You would add new
422 * mapping configurations in here.
423 **/
424 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
425 {
426 int q_vectors;
427 int v_start = 0;
428 int rxr_idx = 0, txr_idx = 0;
429 int rxr_remaining = adapter->num_active_queues;
430 int txr_remaining = adapter->num_active_queues;
431 int i, j;
432 int rqpv, tqpv;
433 int err = 0;
434
435 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
436
437 /* The ideal configuration...
438 * We have enough vectors to map one per queue.
439 */
440 if (q_vectors >= (rxr_remaining * 2)) {
441 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
442 i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
443
444 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
445 i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
446 goto out;
447 }
448
449 /* If we don't have enough vectors for a 1-to-1
450 * mapping, we'll have to group them so there are
451 * multiple queues per vector.
452 * Re-adjusting *qpv takes care of the remainder.
453 */
454 for (i = v_start; i < q_vectors; i++) {
455 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
456 for (j = 0; j < rqpv; j++) {
457 i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
458 rxr_idx++;
459 rxr_remaining--;
460 }
461 }
462 for (i = v_start; i < q_vectors; i++) {
463 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
464 for (j = 0; j < tqpv; j++) {
465 i40evf_map_vector_to_txq(adapter, i, txr_idx);
466 txr_idx++;
467 txr_remaining--;
468 }
469 }
470
471 out:
472 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
473
474 return err;
475 }
476
477 #ifdef CONFIG_NET_POLL_CONTROLLER
478 /**
479 * i40evf_netpoll - A Polling 'interrupt' handler
480 * @netdev: network interface device structure
481 *
482 * This is used by netconsole to send skbs without having to re-enable
483 * interrupts. It's not called while the normal interrupt routine is executing.
484 **/
485 static void i40evf_netpoll(struct net_device *netdev)
486 {
487 struct i40evf_adapter *adapter = netdev_priv(netdev);
488 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
489 int i;
490
491 /* if interface is down do nothing */
492 if (test_bit(__I40E_DOWN, &adapter->vsi.state))
493 return;
494
495 for (i = 0; i < q_vectors; i++)
496 i40evf_msix_clean_rings(0, &adapter->q_vectors[i]);
497 }
498
499 #endif
500 /**
501 * i40evf_irq_affinity_notify - Callback for affinity changes
502 * @notify: context as to what irq was changed
503 * @mask: the new affinity mask
504 *
505 * This is a callback function used by the irq_set_affinity_notifier function
506 * so that we may register to receive changes to the irq affinity masks.
507 **/
508 static void i40evf_irq_affinity_notify(struct irq_affinity_notify *notify,
509 const cpumask_t *mask)
510 {
511 struct i40e_q_vector *q_vector =
512 container_of(notify, struct i40e_q_vector, affinity_notify);
513
514 q_vector->affinity_mask = *mask;
515 }
516
517 /**
518 * i40evf_irq_affinity_release - Callback for affinity notifier release
519 * @ref: internal core kernel usage
520 *
521 * This is a callback function used by the irq_set_affinity_notifier function
522 * to inform the current notification subscriber that they will no longer
523 * receive notifications.
524 **/
525 static void i40evf_irq_affinity_release(struct kref *ref) {}
526
527 /**
528 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
529 * @adapter: board private structure
530 *
531 * Allocates MSI-X vectors for tx and rx handling, and requests
532 * interrupts from the kernel.
533 **/
534 static int
535 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
536 {
537 int vector, err, q_vectors;
538 int rx_int_idx = 0, tx_int_idx = 0;
539 int irq_num;
540
541 i40evf_irq_disable(adapter);
542 /* Decrement for Other and TCP Timer vectors */
543 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
544
545 for (vector = 0; vector < q_vectors; vector++) {
546 struct i40e_q_vector *q_vector = &adapter->q_vectors[vector];
547 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
548
549 if (q_vector->tx.ring && q_vector->rx.ring) {
550 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
551 "i40evf-%s-%s-%d", basename,
552 "TxRx", rx_int_idx++);
553 tx_int_idx++;
554 } else if (q_vector->rx.ring) {
555 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
556 "i40evf-%s-%s-%d", basename,
557 "rx", rx_int_idx++);
558 } else if (q_vector->tx.ring) {
559 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
560 "i40evf-%s-%s-%d", basename,
561 "tx", tx_int_idx++);
562 } else {
563 /* skip this unused q_vector */
564 continue;
565 }
566 err = request_irq(irq_num,
567 i40evf_msix_clean_rings,
568 0,
569 q_vector->name,
570 q_vector);
571 if (err) {
572 dev_info(&adapter->pdev->dev,
573 "Request_irq failed, error: %d\n", err);
574 goto free_queue_irqs;
575 }
576 /* register for affinity change notifications */
577 q_vector->affinity_notify.notify = i40evf_irq_affinity_notify;
578 q_vector->affinity_notify.release =
579 i40evf_irq_affinity_release;
580 irq_set_affinity_notifier(irq_num, &q_vector->affinity_notify);
581 /* assign the mask for this irq */
582 irq_set_affinity_hint(irq_num, &q_vector->affinity_mask);
583 }
584
585 return 0;
586
587 free_queue_irqs:
588 while (vector) {
589 vector--;
590 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
591 irq_set_affinity_notifier(irq_num, NULL);
592 irq_set_affinity_hint(irq_num, NULL);
593 free_irq(irq_num, &adapter->q_vectors[vector]);
594 }
595 return err;
596 }
597
598 /**
599 * i40evf_request_misc_irq - Initialize MSI-X interrupts
600 * @adapter: board private structure
601 *
602 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
603 * vector is only for the admin queue, and stays active even when the netdev
604 * is closed.
605 **/
606 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
607 {
608 struct net_device *netdev = adapter->netdev;
609 int err;
610
611 snprintf(adapter->misc_vector_name,
612 sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
613 dev_name(&adapter->pdev->dev));
614 err = request_irq(adapter->msix_entries[0].vector,
615 &i40evf_msix_aq, 0,
616 adapter->misc_vector_name, netdev);
617 if (err) {
618 dev_err(&adapter->pdev->dev,
619 "request_irq for %s failed: %d\n",
620 adapter->misc_vector_name, err);
621 free_irq(adapter->msix_entries[0].vector, netdev);
622 }
623 return err;
624 }
625
626 /**
627 * i40evf_free_traffic_irqs - Free MSI-X interrupts
628 * @adapter: board private structure
629 *
630 * Frees all MSI-X vectors other than 0.
631 **/
632 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
633 {
634 int vector, irq_num, q_vectors;
635
636 if (!adapter->msix_entries)
637 return;
638
639 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
640
641 for (vector = 0; vector < q_vectors; vector++) {
642 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
643 irq_set_affinity_notifier(irq_num, NULL);
644 irq_set_affinity_hint(irq_num, NULL);
645 free_irq(irq_num, &adapter->q_vectors[vector]);
646 }
647 }
648
649 /**
650 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
651 * @adapter: board private structure
652 *
653 * Frees MSI-X vector 0.
654 **/
655 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
656 {
657 struct net_device *netdev = adapter->netdev;
658
659 if (!adapter->msix_entries)
660 return;
661
662 free_irq(adapter->msix_entries[0].vector, netdev);
663 }
664
665 /**
666 * i40evf_configure_tx - Configure Transmit Unit after Reset
667 * @adapter: board private structure
668 *
669 * Configure the Tx unit of the MAC after a reset.
670 **/
671 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
672 {
673 struct i40e_hw *hw = &adapter->hw;
674 int i;
675
676 for (i = 0; i < adapter->num_active_queues; i++)
677 adapter->tx_rings[i].tail = hw->hw_addr + I40E_QTX_TAIL1(i);
678 }
679
680 /**
681 * i40evf_configure_rx - Configure Receive Unit after Reset
682 * @adapter: board private structure
683 *
684 * Configure the Rx unit of the MAC after a reset.
685 **/
686 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
687 {
688 struct i40e_hw *hw = &adapter->hw;
689 int i;
690
691 for (i = 0; i < adapter->num_active_queues; i++) {
692 adapter->rx_rings[i].tail = hw->hw_addr + I40E_QRX_TAIL1(i);
693 adapter->rx_rings[i].rx_buf_len = I40EVF_RXBUFFER_2048;
694 }
695 }
696
697 /**
698 * i40evf_find_vlan - Search filter list for specific vlan filter
699 * @adapter: board private structure
700 * @vlan: vlan tag
701 *
702 * Returns ptr to the filter object or NULL
703 **/
704 static struct
705 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
706 {
707 struct i40evf_vlan_filter *f;
708
709 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
710 if (vlan == f->vlan)
711 return f;
712 }
713 return NULL;
714 }
715
716 /**
717 * i40evf_add_vlan - Add a vlan filter to the list
718 * @adapter: board private structure
719 * @vlan: VLAN tag
720 *
721 * Returns ptr to the filter object or NULL when no memory available.
722 **/
723 static struct
724 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
725 {
726 struct i40evf_vlan_filter *f = NULL;
727 int count = 50;
728
729 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
730 &adapter->crit_section)) {
731 udelay(1);
732 if (--count == 0)
733 goto out;
734 }
735
736 f = i40evf_find_vlan(adapter, vlan);
737 if (!f) {
738 f = kzalloc(sizeof(*f), GFP_ATOMIC);
739 if (!f)
740 goto clearout;
741
742 f->vlan = vlan;
743
744 INIT_LIST_HEAD(&f->list);
745 list_add(&f->list, &adapter->vlan_filter_list);
746 f->add = true;
747 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
748 }
749
750 clearout:
751 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
752 out:
753 return f;
754 }
755
756 /**
757 * i40evf_del_vlan - Remove a vlan filter from the list
758 * @adapter: board private structure
759 * @vlan: VLAN tag
760 **/
761 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
762 {
763 struct i40evf_vlan_filter *f;
764 int count = 50;
765
766 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
767 &adapter->crit_section)) {
768 udelay(1);
769 if (--count == 0)
770 return;
771 }
772
773 f = i40evf_find_vlan(adapter, vlan);
774 if (f) {
775 f->remove = true;
776 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
777 }
778 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
779 }
780
781 /**
782 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
783 * @netdev: network device struct
784 * @vid: VLAN tag
785 **/
786 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
787 __always_unused __be16 proto, u16 vid)
788 {
789 struct i40evf_adapter *adapter = netdev_priv(netdev);
790
791 if (!VLAN_ALLOWED(adapter))
792 return -EIO;
793 if (i40evf_add_vlan(adapter, vid) == NULL)
794 return -ENOMEM;
795 return 0;
796 }
797
798 /**
799 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
800 * @netdev: network device struct
801 * @vid: VLAN tag
802 **/
803 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
804 __always_unused __be16 proto, u16 vid)
805 {
806 struct i40evf_adapter *adapter = netdev_priv(netdev);
807
808 if (VLAN_ALLOWED(adapter)) {
809 i40evf_del_vlan(adapter, vid);
810 return 0;
811 }
812 return -EIO;
813 }
814
815 /**
816 * i40evf_find_filter - Search filter list for specific mac filter
817 * @adapter: board private structure
818 * @macaddr: the MAC address
819 *
820 * Returns ptr to the filter object or NULL
821 **/
822 static struct
823 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
824 u8 *macaddr)
825 {
826 struct i40evf_mac_filter *f;
827
828 if (!macaddr)
829 return NULL;
830
831 list_for_each_entry(f, &adapter->mac_filter_list, list) {
832 if (ether_addr_equal(macaddr, f->macaddr))
833 return f;
834 }
835 return NULL;
836 }
837
838 /**
839 * i40e_add_filter - Add a mac filter to the filter list
840 * @adapter: board private structure
841 * @macaddr: the MAC address
842 *
843 * Returns ptr to the filter object or NULL when no memory available.
844 **/
845 static struct
846 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
847 u8 *macaddr)
848 {
849 struct i40evf_mac_filter *f;
850 int count = 50;
851
852 if (!macaddr)
853 return NULL;
854
855 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
856 &adapter->crit_section)) {
857 udelay(1);
858 if (--count == 0)
859 return NULL;
860 }
861
862 f = i40evf_find_filter(adapter, macaddr);
863 if (!f) {
864 f = kzalloc(sizeof(*f), GFP_ATOMIC);
865 if (!f) {
866 clear_bit(__I40EVF_IN_CRITICAL_TASK,
867 &adapter->crit_section);
868 return NULL;
869 }
870
871 ether_addr_copy(f->macaddr, macaddr);
872
873 list_add_tail(&f->list, &adapter->mac_filter_list);
874 f->add = true;
875 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
876 }
877
878 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
879 return f;
880 }
881
882 /**
883 * i40evf_set_mac - NDO callback to set port mac address
884 * @netdev: network interface device structure
885 * @p: pointer to an address structure
886 *
887 * Returns 0 on success, negative on failure
888 **/
889 static int i40evf_set_mac(struct net_device *netdev, void *p)
890 {
891 struct i40evf_adapter *adapter = netdev_priv(netdev);
892 struct i40e_hw *hw = &adapter->hw;
893 struct i40evf_mac_filter *f;
894 struct sockaddr *addr = p;
895
896 if (!is_valid_ether_addr(addr->sa_data))
897 return -EADDRNOTAVAIL;
898
899 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
900 return 0;
901
902 if (adapter->flags & I40EVF_FLAG_ADDR_SET_BY_PF)
903 return -EPERM;
904
905 f = i40evf_find_filter(adapter, hw->mac.addr);
906 if (f) {
907 f->remove = true;
908 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
909 }
910
911 f = i40evf_add_filter(adapter, addr->sa_data);
912 if (f) {
913 ether_addr_copy(hw->mac.addr, addr->sa_data);
914 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
915 }
916
917 return (f == NULL) ? -ENOMEM : 0;
918 }
919
920 /**
921 * i40evf_set_rx_mode - NDO callback to set the netdev filters
922 * @netdev: network interface device structure
923 **/
924 static void i40evf_set_rx_mode(struct net_device *netdev)
925 {
926 struct i40evf_adapter *adapter = netdev_priv(netdev);
927 struct i40evf_mac_filter *f, *ftmp;
928 struct netdev_hw_addr *uca;
929 struct netdev_hw_addr *mca;
930 struct netdev_hw_addr *ha;
931 int count = 50;
932
933 /* add addr if not already in the filter list */
934 netdev_for_each_uc_addr(uca, netdev) {
935 i40evf_add_filter(adapter, uca->addr);
936 }
937 netdev_for_each_mc_addr(mca, netdev) {
938 i40evf_add_filter(adapter, mca->addr);
939 }
940
941 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
942 &adapter->crit_section)) {
943 udelay(1);
944 if (--count == 0) {
945 dev_err(&adapter->pdev->dev,
946 "Failed to get lock in %s\n", __func__);
947 return;
948 }
949 }
950 /* remove filter if not in netdev list */
951 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
952 netdev_for_each_mc_addr(mca, netdev)
953 if (ether_addr_equal(mca->addr, f->macaddr))
954 goto bottom_of_search_loop;
955
956 netdev_for_each_uc_addr(uca, netdev)
957 if (ether_addr_equal(uca->addr, f->macaddr))
958 goto bottom_of_search_loop;
959
960 for_each_dev_addr(netdev, ha)
961 if (ether_addr_equal(ha->addr, f->macaddr))
962 goto bottom_of_search_loop;
963
964 if (ether_addr_equal(f->macaddr, adapter->hw.mac.addr))
965 goto bottom_of_search_loop;
966
967 /* f->macaddr wasn't found in uc, mc, or ha list so delete it */
968 f->remove = true;
969 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
970
971 bottom_of_search_loop:
972 continue;
973 }
974
975 if (netdev->flags & IFF_PROMISC &&
976 !(adapter->flags & I40EVF_FLAG_PROMISC_ON))
977 adapter->aq_required |= I40EVF_FLAG_AQ_REQUEST_PROMISC;
978 else if (!(netdev->flags & IFF_PROMISC) &&
979 adapter->flags & I40EVF_FLAG_PROMISC_ON)
980 adapter->aq_required |= I40EVF_FLAG_AQ_RELEASE_PROMISC;
981
982 if (netdev->flags & IFF_ALLMULTI &&
983 !(adapter->flags & I40EVF_FLAG_ALLMULTI_ON))
984 adapter->aq_required |= I40EVF_FLAG_AQ_REQUEST_ALLMULTI;
985 else if (!(netdev->flags & IFF_ALLMULTI) &&
986 adapter->flags & I40EVF_FLAG_ALLMULTI_ON)
987 adapter->aq_required |= I40EVF_FLAG_AQ_RELEASE_ALLMULTI;
988
989 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
990 }
991
992 /**
993 * i40evf_napi_enable_all - enable NAPI on all queue vectors
994 * @adapter: board private structure
995 **/
996 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
997 {
998 int q_idx;
999 struct i40e_q_vector *q_vector;
1000 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1001
1002 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1003 struct napi_struct *napi;
1004
1005 q_vector = &adapter->q_vectors[q_idx];
1006 napi = &q_vector->napi;
1007 napi_enable(napi);
1008 }
1009 }
1010
1011 /**
1012 * i40evf_napi_disable_all - disable NAPI on all queue vectors
1013 * @adapter: board private structure
1014 **/
1015 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
1016 {
1017 int q_idx;
1018 struct i40e_q_vector *q_vector;
1019 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1020
1021 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1022 q_vector = &adapter->q_vectors[q_idx];
1023 napi_disable(&q_vector->napi);
1024 }
1025 }
1026
1027 /**
1028 * i40evf_configure - set up transmit and receive data structures
1029 * @adapter: board private structure
1030 **/
1031 static void i40evf_configure(struct i40evf_adapter *adapter)
1032 {
1033 struct net_device *netdev = adapter->netdev;
1034 int i;
1035
1036 i40evf_set_rx_mode(netdev);
1037
1038 i40evf_configure_tx(adapter);
1039 i40evf_configure_rx(adapter);
1040 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
1041
1042 for (i = 0; i < adapter->num_active_queues; i++) {
1043 struct i40e_ring *ring = &adapter->rx_rings[i];
1044
1045 i40evf_alloc_rx_buffers(ring, I40E_DESC_UNUSED(ring));
1046 }
1047 }
1048
1049 /**
1050 * i40evf_up_complete - Finish the last steps of bringing up a connection
1051 * @adapter: board private structure
1052 **/
1053 static void i40evf_up_complete(struct i40evf_adapter *adapter)
1054 {
1055 adapter->state = __I40EVF_RUNNING;
1056 clear_bit(__I40E_DOWN, &adapter->vsi.state);
1057
1058 i40evf_napi_enable_all(adapter);
1059
1060 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
1061 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
1062 }
1063
1064 /**
1065 * i40e_down - Shutdown the connection processing
1066 * @adapter: board private structure
1067 **/
1068 void i40evf_down(struct i40evf_adapter *adapter)
1069 {
1070 struct net_device *netdev = adapter->netdev;
1071 struct i40evf_mac_filter *f;
1072
1073 if (adapter->state <= __I40EVF_DOWN_PENDING)
1074 return;
1075
1076 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1077 &adapter->crit_section))
1078 usleep_range(500, 1000);
1079
1080 netif_carrier_off(netdev);
1081 netif_tx_disable(netdev);
1082 adapter->link_up = false;
1083 i40evf_napi_disable_all(adapter);
1084 i40evf_irq_disable(adapter);
1085
1086 /* remove all MAC filters */
1087 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1088 f->remove = true;
1089 }
1090 /* remove all VLAN filters */
1091 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1092 f->remove = true;
1093 }
1094 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1095 adapter->state != __I40EVF_RESETTING) {
1096 /* cancel any current operation */
1097 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1098 /* Schedule operations to close down the HW. Don't wait
1099 * here for this to complete. The watchdog is still running
1100 * and it will take care of this.
1101 */
1102 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
1103 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
1104 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
1105 }
1106
1107 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1108 }
1109
1110 /**
1111 * i40evf_acquire_msix_vectors - Setup the MSIX capability
1112 * @adapter: board private structure
1113 * @vectors: number of vectors to request
1114 *
1115 * Work with the OS to set up the MSIX vectors needed.
1116 *
1117 * Returns 0 on success, negative on failure
1118 **/
1119 static int
1120 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1121 {
1122 int err, vector_threshold;
1123
1124 /* We'll want at least 3 (vector_threshold):
1125 * 0) Other (Admin Queue and link, mostly)
1126 * 1) TxQ[0] Cleanup
1127 * 2) RxQ[0] Cleanup
1128 */
1129 vector_threshold = MIN_MSIX_COUNT;
1130
1131 /* The more we get, the more we will assign to Tx/Rx Cleanup
1132 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1133 * Right now, we simply care about how many we'll get; we'll
1134 * set them up later while requesting irq's.
1135 */
1136 err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1137 vector_threshold, vectors);
1138 if (err < 0) {
1139 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1140 kfree(adapter->msix_entries);
1141 adapter->msix_entries = NULL;
1142 return err;
1143 }
1144
1145 /* Adjust for only the vectors we'll use, which is minimum
1146 * of max_msix_q_vectors + NONQ_VECS, or the number of
1147 * vectors we were allocated.
1148 */
1149 adapter->num_msix_vectors = err;
1150 return 0;
1151 }
1152
1153 /**
1154 * i40evf_free_queues - Free memory for all rings
1155 * @adapter: board private structure to initialize
1156 *
1157 * Free all of the memory associated with queue pairs.
1158 **/
1159 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1160 {
1161 if (!adapter->vsi_res)
1162 return;
1163 kfree(adapter->tx_rings);
1164 adapter->tx_rings = NULL;
1165 kfree(adapter->rx_rings);
1166 adapter->rx_rings = NULL;
1167 }
1168
1169 /**
1170 * i40evf_alloc_queues - Allocate memory for all rings
1171 * @adapter: board private structure to initialize
1172 *
1173 * We allocate one ring per queue at run-time since we don't know the
1174 * number of queues at compile-time. The polling_netdev array is
1175 * intended for Multiqueue, but should work fine with a single queue.
1176 **/
1177 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1178 {
1179 int i;
1180
1181 adapter->tx_rings = kcalloc(adapter->num_active_queues,
1182 sizeof(struct i40e_ring), GFP_KERNEL);
1183 if (!adapter->tx_rings)
1184 goto err_out;
1185 adapter->rx_rings = kcalloc(adapter->num_active_queues,
1186 sizeof(struct i40e_ring), GFP_KERNEL);
1187 if (!adapter->rx_rings)
1188 goto err_out;
1189
1190 for (i = 0; i < adapter->num_active_queues; i++) {
1191 struct i40e_ring *tx_ring;
1192 struct i40e_ring *rx_ring;
1193
1194 tx_ring = &adapter->tx_rings[i];
1195
1196 tx_ring->queue_index = i;
1197 tx_ring->netdev = adapter->netdev;
1198 tx_ring->dev = &adapter->pdev->dev;
1199 tx_ring->count = adapter->tx_desc_count;
1200 tx_ring->tx_itr_setting = (I40E_ITR_DYNAMIC | I40E_ITR_TX_DEF);
1201 if (adapter->flags & I40E_FLAG_WB_ON_ITR_CAPABLE)
1202 tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR;
1203
1204 rx_ring = &adapter->rx_rings[i];
1205 rx_ring->queue_index = i;
1206 rx_ring->netdev = adapter->netdev;
1207 rx_ring->dev = &adapter->pdev->dev;
1208 rx_ring->count = adapter->rx_desc_count;
1209 rx_ring->rx_itr_setting = (I40E_ITR_DYNAMIC | I40E_ITR_RX_DEF);
1210 }
1211
1212 return 0;
1213
1214 err_out:
1215 i40evf_free_queues(adapter);
1216 return -ENOMEM;
1217 }
1218
1219 /**
1220 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1221 * @adapter: board private structure to initialize
1222 *
1223 * Attempt to configure the interrupts using the best available
1224 * capabilities of the hardware and the kernel.
1225 **/
1226 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1227 {
1228 int vector, v_budget;
1229 int pairs = 0;
1230 int err = 0;
1231
1232 if (!adapter->vsi_res) {
1233 err = -EIO;
1234 goto out;
1235 }
1236 pairs = adapter->num_active_queues;
1237
1238 /* It's easy to be greedy for MSI-X vectors, but it really
1239 * doesn't do us much good if we have a lot more vectors
1240 * than CPU's. So let's be conservative and only ask for
1241 * (roughly) twice the number of vectors as there are CPU's.
1242 */
1243 v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1244 v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1245
1246 adapter->msix_entries = kcalloc(v_budget,
1247 sizeof(struct msix_entry), GFP_KERNEL);
1248 if (!adapter->msix_entries) {
1249 err = -ENOMEM;
1250 goto out;
1251 }
1252
1253 for (vector = 0; vector < v_budget; vector++)
1254 adapter->msix_entries[vector].entry = vector;
1255
1256 err = i40evf_acquire_msix_vectors(adapter, v_budget);
1257
1258 out:
1259 netif_set_real_num_rx_queues(adapter->netdev, pairs);
1260 netif_set_real_num_tx_queues(adapter->netdev, pairs);
1261 return err;
1262 }
1263
1264 /**
1265 * i40e_config_rss_aq - Configure RSS keys and lut by using AQ commands
1266 * @adapter: board private structure
1267 *
1268 * Return 0 on success, negative on failure
1269 **/
1270 static int i40evf_config_rss_aq(struct i40evf_adapter *adapter)
1271 {
1272 struct i40e_aqc_get_set_rss_key_data *rss_key =
1273 (struct i40e_aqc_get_set_rss_key_data *)adapter->rss_key;
1274 struct i40e_hw *hw = &adapter->hw;
1275 int ret = 0;
1276
1277 if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
1278 /* bail because we already have a command pending */
1279 dev_err(&adapter->pdev->dev, "Cannot configure RSS, command %d pending\n",
1280 adapter->current_op);
1281 return -EBUSY;
1282 }
1283
1284 ret = i40evf_aq_set_rss_key(hw, adapter->vsi.id, rss_key);
1285 if (ret) {
1286 dev_err(&adapter->pdev->dev, "Cannot set RSS key, err %s aq_err %s\n",
1287 i40evf_stat_str(hw, ret),
1288 i40evf_aq_str(hw, hw->aq.asq_last_status));
1289 return ret;
1290
1291 }
1292
1293 ret = i40evf_aq_set_rss_lut(hw, adapter->vsi.id, false,
1294 adapter->rss_lut, adapter->rss_lut_size);
1295 if (ret) {
1296 dev_err(&adapter->pdev->dev, "Cannot set RSS lut, err %s aq_err %s\n",
1297 i40evf_stat_str(hw, ret),
1298 i40evf_aq_str(hw, hw->aq.asq_last_status));
1299 }
1300
1301 return ret;
1302
1303 }
1304
1305 /**
1306 * i40evf_config_rss_reg - Configure RSS keys and lut by writing registers
1307 * @adapter: board private structure
1308 *
1309 * Returns 0 on success, negative on failure
1310 **/
1311 static int i40evf_config_rss_reg(struct i40evf_adapter *adapter)
1312 {
1313 struct i40e_hw *hw = &adapter->hw;
1314 u32 *dw;
1315 u16 i;
1316
1317 dw = (u32 *)adapter->rss_key;
1318 for (i = 0; i <= adapter->rss_key_size / 4; i++)
1319 wr32(hw, I40E_VFQF_HKEY(i), dw[i]);
1320
1321 dw = (u32 *)adapter->rss_lut;
1322 for (i = 0; i <= adapter->rss_lut_size / 4; i++)
1323 wr32(hw, I40E_VFQF_HLUT(i), dw[i]);
1324
1325 i40e_flush(hw);
1326
1327 return 0;
1328 }
1329
1330 /**
1331 * i40evf_config_rss - Configure RSS keys and lut
1332 * @adapter: board private structure
1333 *
1334 * Returns 0 on success, negative on failure
1335 **/
1336 int i40evf_config_rss(struct i40evf_adapter *adapter)
1337 {
1338
1339 if (RSS_PF(adapter)) {
1340 adapter->aq_required |= I40EVF_FLAG_AQ_SET_RSS_LUT |
1341 I40EVF_FLAG_AQ_SET_RSS_KEY;
1342 return 0;
1343 } else if (RSS_AQ(adapter)) {
1344 return i40evf_config_rss_aq(adapter);
1345 } else {
1346 return i40evf_config_rss_reg(adapter);
1347 }
1348 }
1349
1350 /**
1351 * i40evf_fill_rss_lut - Fill the lut with default values
1352 * @adapter: board private structure
1353 **/
1354 static void i40evf_fill_rss_lut(struct i40evf_adapter *adapter)
1355 {
1356 u16 i;
1357
1358 for (i = 0; i < adapter->rss_lut_size; i++)
1359 adapter->rss_lut[i] = i % adapter->num_active_queues;
1360 }
1361
1362 /**
1363 * i40evf_init_rss - Prepare for RSS
1364 * @adapter: board private structure
1365 *
1366 * Return 0 on success, negative on failure
1367 **/
1368 static int i40evf_init_rss(struct i40evf_adapter *adapter)
1369 {
1370 struct i40e_hw *hw = &adapter->hw;
1371 int ret;
1372
1373 if (!RSS_PF(adapter)) {
1374 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1375 if (adapter->vf_res->vf_offload_flags &
1376 I40E_VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2)
1377 adapter->hena = I40E_DEFAULT_RSS_HENA_EXPANDED;
1378 else
1379 adapter->hena = I40E_DEFAULT_RSS_HENA;
1380
1381 wr32(hw, I40E_VFQF_HENA(0), (u32)adapter->hena);
1382 wr32(hw, I40E_VFQF_HENA(1), (u32)(adapter->hena >> 32));
1383 }
1384
1385 i40evf_fill_rss_lut(adapter);
1386
1387 netdev_rss_key_fill((void *)adapter->rss_key, adapter->rss_key_size);
1388 ret = i40evf_config_rss(adapter);
1389
1390 return ret;
1391 }
1392
1393 /**
1394 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1395 * @adapter: board private structure to initialize
1396 *
1397 * We allocate one q_vector per queue interrupt. If allocation fails we
1398 * return -ENOMEM.
1399 **/
1400 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1401 {
1402 int q_idx = 0, num_q_vectors;
1403 struct i40e_q_vector *q_vector;
1404
1405 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1406 adapter->q_vectors = kcalloc(num_q_vectors, sizeof(*q_vector),
1407 GFP_KERNEL);
1408 if (!adapter->q_vectors)
1409 return -ENOMEM;
1410
1411 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1412 q_vector = &adapter->q_vectors[q_idx];
1413 q_vector->adapter = adapter;
1414 q_vector->vsi = &adapter->vsi;
1415 q_vector->v_idx = q_idx;
1416 netif_napi_add(adapter->netdev, &q_vector->napi,
1417 i40evf_napi_poll, NAPI_POLL_WEIGHT);
1418 }
1419
1420 return 0;
1421 }
1422
1423 /**
1424 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1425 * @adapter: board private structure to initialize
1426 *
1427 * This function frees the memory allocated to the q_vectors. In addition if
1428 * NAPI is enabled it will delete any references to the NAPI struct prior
1429 * to freeing the q_vector.
1430 **/
1431 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1432 {
1433 int q_idx, num_q_vectors;
1434 int napi_vectors;
1435
1436 if (!adapter->q_vectors)
1437 return;
1438
1439 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1440 napi_vectors = adapter->num_active_queues;
1441
1442 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1443 struct i40e_q_vector *q_vector = &adapter->q_vectors[q_idx];
1444 if (q_idx < napi_vectors)
1445 netif_napi_del(&q_vector->napi);
1446 }
1447 kfree(adapter->q_vectors);
1448 adapter->q_vectors = NULL;
1449 }
1450
1451 /**
1452 * i40evf_reset_interrupt_capability - Reset MSIX setup
1453 * @adapter: board private structure
1454 *
1455 **/
1456 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1457 {
1458 if (!adapter->msix_entries)
1459 return;
1460
1461 pci_disable_msix(adapter->pdev);
1462 kfree(adapter->msix_entries);
1463 adapter->msix_entries = NULL;
1464 }
1465
1466 /**
1467 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1468 * @adapter: board private structure to initialize
1469 *
1470 **/
1471 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1472 {
1473 int err;
1474
1475 rtnl_lock();
1476 err = i40evf_set_interrupt_capability(adapter);
1477 rtnl_unlock();
1478 if (err) {
1479 dev_err(&adapter->pdev->dev,
1480 "Unable to setup interrupt capabilities\n");
1481 goto err_set_interrupt;
1482 }
1483
1484 err = i40evf_alloc_q_vectors(adapter);
1485 if (err) {
1486 dev_err(&adapter->pdev->dev,
1487 "Unable to allocate memory for queue vectors\n");
1488 goto err_alloc_q_vectors;
1489 }
1490
1491 err = i40evf_alloc_queues(adapter);
1492 if (err) {
1493 dev_err(&adapter->pdev->dev,
1494 "Unable to allocate memory for queues\n");
1495 goto err_alloc_queues;
1496 }
1497
1498 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1499 (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1500 adapter->num_active_queues);
1501
1502 return 0;
1503 err_alloc_queues:
1504 i40evf_free_q_vectors(adapter);
1505 err_alloc_q_vectors:
1506 i40evf_reset_interrupt_capability(adapter);
1507 err_set_interrupt:
1508 return err;
1509 }
1510
1511 /**
1512 * i40evf_free_rss - Free memory used by RSS structs
1513 * @adapter: board private structure
1514 **/
1515 static void i40evf_free_rss(struct i40evf_adapter *adapter)
1516 {
1517 kfree(adapter->rss_key);
1518 adapter->rss_key = NULL;
1519
1520 kfree(adapter->rss_lut);
1521 adapter->rss_lut = NULL;
1522 }
1523
1524 /**
1525 * i40evf_watchdog_timer - Periodic call-back timer
1526 * @data: pointer to adapter disguised as unsigned long
1527 **/
1528 static void i40evf_watchdog_timer(unsigned long data)
1529 {
1530 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1531
1532 schedule_work(&adapter->watchdog_task);
1533 /* timer will be rescheduled in watchdog task */
1534 }
1535
1536 /**
1537 * i40evf_watchdog_task - Periodic call-back task
1538 * @work: pointer to work_struct
1539 **/
1540 static void i40evf_watchdog_task(struct work_struct *work)
1541 {
1542 struct i40evf_adapter *adapter = container_of(work,
1543 struct i40evf_adapter,
1544 watchdog_task);
1545 struct i40e_hw *hw = &adapter->hw;
1546 u32 reg_val;
1547
1548 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1549 goto restart_watchdog;
1550
1551 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1552 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1553 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1554 if ((reg_val == I40E_VFR_VFACTIVE) ||
1555 (reg_val == I40E_VFR_COMPLETED)) {
1556 /* A chance for redemption! */
1557 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1558 adapter->state = __I40EVF_STARTUP;
1559 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1560 schedule_delayed_work(&adapter->init_task, 10);
1561 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1562 &adapter->crit_section);
1563 /* Don't reschedule the watchdog, since we've restarted
1564 * the init task. When init_task contacts the PF and
1565 * gets everything set up again, it'll restart the
1566 * watchdog for us. Down, boy. Sit. Stay. Woof.
1567 */
1568 return;
1569 }
1570 adapter->aq_required = 0;
1571 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1572 goto watchdog_done;
1573 }
1574
1575 if ((adapter->state < __I40EVF_DOWN) ||
1576 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1577 goto watchdog_done;
1578
1579 /* check for reset */
1580 reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
1581 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
1582 adapter->state = __I40EVF_RESETTING;
1583 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1584 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1585 schedule_work(&adapter->reset_task);
1586 adapter->aq_required = 0;
1587 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1588 goto watchdog_done;
1589 }
1590
1591 /* Process admin queue tasks. After init, everything gets done
1592 * here so we don't race on the admin queue.
1593 */
1594 if (adapter->current_op) {
1595 if (!i40evf_asq_done(hw)) {
1596 dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1597 i40evf_send_api_ver(adapter);
1598 }
1599 goto watchdog_done;
1600 }
1601 if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
1602 i40evf_send_vf_config_msg(adapter);
1603 goto watchdog_done;
1604 }
1605
1606 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1607 i40evf_disable_queues(adapter);
1608 goto watchdog_done;
1609 }
1610
1611 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1612 i40evf_map_queues(adapter);
1613 goto watchdog_done;
1614 }
1615
1616 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1617 i40evf_add_ether_addrs(adapter);
1618 goto watchdog_done;
1619 }
1620
1621 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1622 i40evf_add_vlans(adapter);
1623 goto watchdog_done;
1624 }
1625
1626 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1627 i40evf_del_ether_addrs(adapter);
1628 goto watchdog_done;
1629 }
1630
1631 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1632 i40evf_del_vlans(adapter);
1633 goto watchdog_done;
1634 }
1635
1636 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1637 i40evf_configure_queues(adapter);
1638 goto watchdog_done;
1639 }
1640
1641 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1642 i40evf_enable_queues(adapter);
1643 goto watchdog_done;
1644 }
1645
1646 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
1647 /* This message goes straight to the firmware, not the
1648 * PF, so we don't have to set current_op as we will
1649 * not get a response through the ARQ.
1650 */
1651 i40evf_init_rss(adapter);
1652 adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
1653 goto watchdog_done;
1654 }
1655 if (adapter->aq_required & I40EVF_FLAG_AQ_GET_HENA) {
1656 i40evf_get_hena(adapter);
1657 goto watchdog_done;
1658 }
1659 if (adapter->aq_required & I40EVF_FLAG_AQ_SET_HENA) {
1660 i40evf_set_hena(adapter);
1661 goto watchdog_done;
1662 }
1663 if (adapter->aq_required & I40EVF_FLAG_AQ_SET_RSS_KEY) {
1664 i40evf_set_rss_key(adapter);
1665 goto watchdog_done;
1666 }
1667 if (adapter->aq_required & I40EVF_FLAG_AQ_SET_RSS_LUT) {
1668 i40evf_set_rss_lut(adapter);
1669 goto watchdog_done;
1670 }
1671
1672 if (adapter->aq_required & I40EVF_FLAG_AQ_REQUEST_PROMISC) {
1673 i40evf_set_promiscuous(adapter, I40E_FLAG_VF_UNICAST_PROMISC |
1674 I40E_FLAG_VF_MULTICAST_PROMISC);
1675 goto watchdog_done;
1676 }
1677
1678 if (adapter->aq_required & I40EVF_FLAG_AQ_REQUEST_ALLMULTI) {
1679 i40evf_set_promiscuous(adapter, I40E_FLAG_VF_MULTICAST_PROMISC);
1680 goto watchdog_done;
1681 }
1682
1683 if ((adapter->aq_required & I40EVF_FLAG_AQ_RELEASE_PROMISC) &&
1684 (adapter->aq_required & I40EVF_FLAG_AQ_RELEASE_ALLMULTI)) {
1685 i40evf_set_promiscuous(adapter, 0);
1686 goto watchdog_done;
1687 }
1688
1689 if (adapter->state == __I40EVF_RUNNING)
1690 i40evf_request_stats(adapter);
1691 watchdog_done:
1692 if (adapter->state == __I40EVF_RUNNING) {
1693 i40evf_irq_enable_queues(adapter, ~0);
1694 i40evf_fire_sw_int(adapter, 0xFF);
1695 } else {
1696 i40evf_fire_sw_int(adapter, 0x1);
1697 }
1698
1699 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1700 restart_watchdog:
1701 if (adapter->state == __I40EVF_REMOVE)
1702 return;
1703 if (adapter->aq_required)
1704 mod_timer(&adapter->watchdog_timer,
1705 jiffies + msecs_to_jiffies(20));
1706 else
1707 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1708 schedule_work(&adapter->adminq_task);
1709 }
1710
1711 static void i40evf_disable_vf(struct i40evf_adapter *adapter)
1712 {
1713 struct i40evf_mac_filter *f, *ftmp;
1714 struct i40evf_vlan_filter *fv, *fvtmp;
1715
1716 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1717
1718 if (netif_running(adapter->netdev)) {
1719 set_bit(__I40E_DOWN, &adapter->vsi.state);
1720 netif_carrier_off(adapter->netdev);
1721 netif_tx_disable(adapter->netdev);
1722 adapter->link_up = false;
1723 i40evf_napi_disable_all(adapter);
1724 i40evf_irq_disable(adapter);
1725 i40evf_free_traffic_irqs(adapter);
1726 i40evf_free_all_tx_resources(adapter);
1727 i40evf_free_all_rx_resources(adapter);
1728 }
1729
1730 /* Delete all of the filters, both MAC and VLAN. */
1731 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
1732 list_del(&f->list);
1733 kfree(f);
1734 }
1735
1736 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list, list) {
1737 list_del(&fv->list);
1738 kfree(fv);
1739 }
1740
1741 i40evf_free_misc_irq(adapter);
1742 i40evf_reset_interrupt_capability(adapter);
1743 i40evf_free_queues(adapter);
1744 i40evf_free_q_vectors(adapter);
1745 kfree(adapter->vf_res);
1746 i40evf_shutdown_adminq(&adapter->hw);
1747 adapter->netdev->flags &= ~IFF_UP;
1748 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1749 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1750 adapter->state = __I40EVF_DOWN;
1751 dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
1752 }
1753
1754 #define I40EVF_RESET_WAIT_MS 10
1755 #define I40EVF_RESET_WAIT_COUNT 500
1756 /**
1757 * i40evf_reset_task - Call-back task to handle hardware reset
1758 * @work: pointer to work_struct
1759 *
1760 * During reset we need to shut down and reinitialize the admin queue
1761 * before we can use it to communicate with the PF again. We also clear
1762 * and reinit the rings because that context is lost as well.
1763 **/
1764 static void i40evf_reset_task(struct work_struct *work)
1765 {
1766 struct i40evf_adapter *adapter = container_of(work,
1767 struct i40evf_adapter,
1768 reset_task);
1769 struct net_device *netdev = adapter->netdev;
1770 struct i40e_hw *hw = &adapter->hw;
1771 struct i40evf_vlan_filter *vlf;
1772 struct i40evf_mac_filter *f;
1773 u32 reg_val;
1774 int i = 0, err;
1775
1776 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1777 &adapter->crit_section))
1778 usleep_range(500, 1000);
1779
1780 i40evf_misc_irq_disable(adapter);
1781 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1782 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1783 /* Restart the AQ here. If we have been reset but didn't
1784 * detect it, or if the PF had to reinit, our AQ will be hosed.
1785 */
1786 i40evf_shutdown_adminq(hw);
1787 i40evf_init_adminq(hw);
1788 i40evf_request_reset(adapter);
1789 }
1790 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1791
1792 /* poll until we see the reset actually happen */
1793 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1794 reg_val = rd32(hw, I40E_VF_ARQLEN1) &
1795 I40E_VF_ARQLEN1_ARQENABLE_MASK;
1796 if (!reg_val)
1797 break;
1798 usleep_range(5000, 10000);
1799 }
1800 if (i == I40EVF_RESET_WAIT_COUNT) {
1801 dev_info(&adapter->pdev->dev, "Never saw reset\n");
1802 goto continue_reset; /* act like the reset happened */
1803 }
1804
1805 /* wait until the reset is complete and the PF is responding to us */
1806 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1807 /* sleep first to make sure a minimum wait time is met */
1808 msleep(I40EVF_RESET_WAIT_MS);
1809
1810 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1811 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1812 if (reg_val == I40E_VFR_VFACTIVE)
1813 break;
1814 }
1815
1816 pci_set_master(adapter->pdev);
1817
1818 if (i == I40EVF_RESET_WAIT_COUNT) {
1819 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1820 reg_val);
1821 i40evf_disable_vf(adapter);
1822 return; /* Do not attempt to reinit. It's dead, Jim. */
1823 }
1824
1825 continue_reset:
1826 if (netif_running(adapter->netdev)) {
1827 netif_carrier_off(netdev);
1828 netif_tx_stop_all_queues(netdev);
1829 adapter->link_up = false;
1830 i40evf_napi_disable_all(adapter);
1831 }
1832 i40evf_irq_disable(adapter);
1833
1834 adapter->state = __I40EVF_RESETTING;
1835 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1836
1837 /* free the Tx/Rx rings and descriptors, might be better to just
1838 * re-use them sometime in the future
1839 */
1840 i40evf_free_all_rx_resources(adapter);
1841 i40evf_free_all_tx_resources(adapter);
1842
1843 /* kill and reinit the admin queue */
1844 i40evf_shutdown_adminq(hw);
1845 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1846 err = i40evf_init_adminq(hw);
1847 if (err)
1848 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1849 err);
1850
1851 adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG;
1852 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
1853
1854 /* re-add all MAC filters */
1855 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1856 f->add = true;
1857 }
1858 /* re-add all VLAN filters */
1859 list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
1860 vlf->add = true;
1861 }
1862 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1863 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1864 /* Open RDMA Client again */
1865 adapter->aq_required |= I40EVF_FLAG_SERVICE_CLIENT_REQUESTED;
1866 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1867 i40evf_misc_irq_enable(adapter);
1868
1869 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1870
1871 if (netif_running(adapter->netdev)) {
1872 /* allocate transmit descriptors */
1873 err = i40evf_setup_all_tx_resources(adapter);
1874 if (err)
1875 goto reset_err;
1876
1877 /* allocate receive descriptors */
1878 err = i40evf_setup_all_rx_resources(adapter);
1879 if (err)
1880 goto reset_err;
1881
1882 i40evf_configure(adapter);
1883
1884 i40evf_up_complete(adapter);
1885
1886 i40evf_irq_enable(adapter, true);
1887 } else {
1888 adapter->state = __I40EVF_DOWN;
1889 }
1890
1891 return;
1892 reset_err:
1893 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1894 i40evf_close(adapter->netdev);
1895 }
1896
1897 /**
1898 * i40evf_adminq_task - worker thread to clean the admin queue
1899 * @work: pointer to work_struct containing our data
1900 **/
1901 static void i40evf_adminq_task(struct work_struct *work)
1902 {
1903 struct i40evf_adapter *adapter =
1904 container_of(work, struct i40evf_adapter, adminq_task);
1905 struct i40e_hw *hw = &adapter->hw;
1906 struct i40e_arq_event_info event;
1907 struct i40e_virtchnl_msg *v_msg;
1908 i40e_status ret;
1909 u32 val, oldval;
1910 u16 pending;
1911
1912 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1913 goto out;
1914
1915 event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1916 event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1917 if (!event.msg_buf)
1918 goto out;
1919
1920 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1921 do {
1922 ret = i40evf_clean_arq_element(hw, &event, &pending);
1923 if (ret || !v_msg->v_opcode)
1924 break; /* No event to process or error cleaning ARQ */
1925
1926 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1927 v_msg->v_retval, event.msg_buf,
1928 event.msg_len);
1929 if (pending != 0)
1930 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1931 } while (pending);
1932
1933 if ((adapter->flags &
1934 (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
1935 adapter->state == __I40EVF_RESETTING)
1936 goto freedom;
1937
1938 /* check for error indications */
1939 val = rd32(hw, hw->aq.arq.len);
1940 if (val == 0xdeadbeef) /* indicates device in reset */
1941 goto freedom;
1942 oldval = val;
1943 if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
1944 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1945 val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
1946 }
1947 if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
1948 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1949 val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
1950 }
1951 if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
1952 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1953 val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
1954 }
1955 if (oldval != val)
1956 wr32(hw, hw->aq.arq.len, val);
1957
1958 val = rd32(hw, hw->aq.asq.len);
1959 oldval = val;
1960 if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
1961 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1962 val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
1963 }
1964 if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
1965 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1966 val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
1967 }
1968 if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
1969 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1970 val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
1971 }
1972 if (oldval != val)
1973 wr32(hw, hw->aq.asq.len, val);
1974
1975 freedom:
1976 kfree(event.msg_buf);
1977 out:
1978 /* re-enable Admin queue interrupt cause */
1979 i40evf_misc_irq_enable(adapter);
1980 }
1981
1982 /**
1983 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1984 * @adapter: board private structure
1985 *
1986 * Free all transmit software resources
1987 **/
1988 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1989 {
1990 int i;
1991
1992 if (!adapter->tx_rings)
1993 return;
1994
1995 for (i = 0; i < adapter->num_active_queues; i++)
1996 if (adapter->tx_rings[i].desc)
1997 i40evf_free_tx_resources(&adapter->tx_rings[i]);
1998 }
1999
2000 /**
2001 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
2002 * @adapter: board private structure
2003 *
2004 * If this function returns with an error, then it's possible one or
2005 * more of the rings is populated (while the rest are not). It is the
2006 * callers duty to clean those orphaned rings.
2007 *
2008 * Return 0 on success, negative on failure
2009 **/
2010 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
2011 {
2012 int i, err = 0;
2013
2014 for (i = 0; i < adapter->num_active_queues; i++) {
2015 adapter->tx_rings[i].count = adapter->tx_desc_count;
2016 err = i40evf_setup_tx_descriptors(&adapter->tx_rings[i]);
2017 if (!err)
2018 continue;
2019 dev_err(&adapter->pdev->dev,
2020 "Allocation for Tx Queue %u failed\n", i);
2021 break;
2022 }
2023
2024 return err;
2025 }
2026
2027 /**
2028 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
2029 * @adapter: board private structure
2030 *
2031 * If this function returns with an error, then it's possible one or
2032 * more of the rings is populated (while the rest are not). It is the
2033 * callers duty to clean those orphaned rings.
2034 *
2035 * Return 0 on success, negative on failure
2036 **/
2037 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
2038 {
2039 int i, err = 0;
2040
2041 for (i = 0; i < adapter->num_active_queues; i++) {
2042 adapter->rx_rings[i].count = adapter->rx_desc_count;
2043 err = i40evf_setup_rx_descriptors(&adapter->rx_rings[i]);
2044 if (!err)
2045 continue;
2046 dev_err(&adapter->pdev->dev,
2047 "Allocation for Rx Queue %u failed\n", i);
2048 break;
2049 }
2050 return err;
2051 }
2052
2053 /**
2054 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
2055 * @adapter: board private structure
2056 *
2057 * Free all receive software resources
2058 **/
2059 void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
2060 {
2061 int i;
2062
2063 if (!adapter->rx_rings)
2064 return;
2065
2066 for (i = 0; i < adapter->num_active_queues; i++)
2067 if (adapter->rx_rings[i].desc)
2068 i40evf_free_rx_resources(&adapter->rx_rings[i]);
2069 }
2070
2071 /**
2072 * i40evf_open - Called when a network interface is made active
2073 * @netdev: network interface device structure
2074 *
2075 * Returns 0 on success, negative value on failure
2076 *
2077 * The open entry point is called when a network interface is made
2078 * active by the system (IFF_UP). At this point all resources needed
2079 * for transmit and receive operations are allocated, the interrupt
2080 * handler is registered with the OS, the watchdog timer is started,
2081 * and the stack is notified that the interface is ready.
2082 **/
2083 static int i40evf_open(struct net_device *netdev)
2084 {
2085 struct i40evf_adapter *adapter = netdev_priv(netdev);
2086 int err;
2087
2088 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
2089 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
2090 return -EIO;
2091 }
2092
2093 if (adapter->state != __I40EVF_DOWN)
2094 return -EBUSY;
2095
2096 /* allocate transmit descriptors */
2097 err = i40evf_setup_all_tx_resources(adapter);
2098 if (err)
2099 goto err_setup_tx;
2100
2101 /* allocate receive descriptors */
2102 err = i40evf_setup_all_rx_resources(adapter);
2103 if (err)
2104 goto err_setup_rx;
2105
2106 /* clear any pending interrupts, may auto mask */
2107 err = i40evf_request_traffic_irqs(adapter, netdev->name);
2108 if (err)
2109 goto err_req_irq;
2110
2111 i40evf_add_filter(adapter, adapter->hw.mac.addr);
2112 i40evf_configure(adapter);
2113
2114 i40evf_up_complete(adapter);
2115
2116 i40evf_irq_enable(adapter, true);
2117
2118 return 0;
2119
2120 err_req_irq:
2121 i40evf_down(adapter);
2122 i40evf_free_traffic_irqs(adapter);
2123 err_setup_rx:
2124 i40evf_free_all_rx_resources(adapter);
2125 err_setup_tx:
2126 i40evf_free_all_tx_resources(adapter);
2127
2128 return err;
2129 }
2130
2131 /**
2132 * i40evf_close - Disables a network interface
2133 * @netdev: network interface device structure
2134 *
2135 * Returns 0, this is not allowed to fail
2136 *
2137 * The close entry point is called when an interface is de-activated
2138 * by the OS. The hardware is still under the drivers control, but
2139 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
2140 * are freed, along with all transmit and receive resources.
2141 **/
2142 static int i40evf_close(struct net_device *netdev)
2143 {
2144 struct i40evf_adapter *adapter = netdev_priv(netdev);
2145
2146 if (adapter->state <= __I40EVF_DOWN_PENDING)
2147 return 0;
2148
2149
2150 set_bit(__I40E_DOWN, &adapter->vsi.state);
2151
2152 i40evf_down(adapter);
2153 adapter->state = __I40EVF_DOWN_PENDING;
2154 i40evf_free_traffic_irqs(adapter);
2155
2156 /* We explicitly don't free resources here because the hardware is
2157 * still active and can DMA into memory. Resources are cleared in
2158 * i40evf_virtchnl_completion() after we get confirmation from the PF
2159 * driver that the rings have been stopped.
2160 */
2161 return 0;
2162 }
2163
2164 /**
2165 * i40evf_get_stats - Get System Network Statistics
2166 * @netdev: network interface device structure
2167 *
2168 * Returns the address of the device statistics structure.
2169 * The statistics are actually updated from the timer callback.
2170 **/
2171 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
2172 {
2173 struct i40evf_adapter *adapter = netdev_priv(netdev);
2174
2175 /* only return the current stats */
2176 return &adapter->net_stats;
2177 }
2178
2179 /**
2180 * i40evf_change_mtu - Change the Maximum Transfer Unit
2181 * @netdev: network interface device structure
2182 * @new_mtu: new value for maximum frame size
2183 *
2184 * Returns 0 on success, negative on failure
2185 **/
2186 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
2187 {
2188 struct i40evf_adapter *adapter = netdev_priv(netdev);
2189
2190 netdev->mtu = new_mtu;
2191 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
2192 schedule_work(&adapter->reset_task);
2193
2194 return 0;
2195 }
2196
2197 /**
2198 * i40evf_features_check - Validate encapsulated packet conforms to limits
2199 * @skb: skb buff
2200 * @netdev: This physical port's netdev
2201 * @features: Offload features that the stack believes apply
2202 **/
2203 static netdev_features_t i40evf_features_check(struct sk_buff *skb,
2204 struct net_device *dev,
2205 netdev_features_t features)
2206 {
2207 size_t len;
2208
2209 /* No point in doing any of this if neither checksum nor GSO are
2210 * being requested for this frame. We can rule out both by just
2211 * checking for CHECKSUM_PARTIAL
2212 */
2213 if (skb->ip_summed != CHECKSUM_PARTIAL)
2214 return features;
2215
2216 /* We cannot support GSO if the MSS is going to be less than
2217 * 64 bytes. If it is then we need to drop support for GSO.
2218 */
2219 if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_size < 64))
2220 features &= ~NETIF_F_GSO_MASK;
2221
2222 /* MACLEN can support at most 63 words */
2223 len = skb_network_header(skb) - skb->data;
2224 if (len & ~(63 * 2))
2225 goto out_err;
2226
2227 /* IPLEN and EIPLEN can support at most 127 dwords */
2228 len = skb_transport_header(skb) - skb_network_header(skb);
2229 if (len & ~(127 * 4))
2230 goto out_err;
2231
2232 if (skb->encapsulation) {
2233 /* L4TUNLEN can support 127 words */
2234 len = skb_inner_network_header(skb) - skb_transport_header(skb);
2235 if (len & ~(127 * 2))
2236 goto out_err;
2237
2238 /* IPLEN can support at most 127 dwords */
2239 len = skb_inner_transport_header(skb) -
2240 skb_inner_network_header(skb);
2241 if (len & ~(127 * 4))
2242 goto out_err;
2243 }
2244
2245 /* No need to validate L4LEN as TCP is the only protocol with a
2246 * a flexible value and we support all possible values supported
2247 * by TCP, which is at most 15 dwords
2248 */
2249
2250 return features;
2251 out_err:
2252 return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
2253 }
2254
2255 #define I40EVF_VLAN_FEATURES (NETIF_F_HW_VLAN_CTAG_TX |\
2256 NETIF_F_HW_VLAN_CTAG_RX |\
2257 NETIF_F_HW_VLAN_CTAG_FILTER)
2258
2259 /**
2260 * i40evf_fix_features - fix up the netdev feature bits
2261 * @netdev: our net device
2262 * @features: desired feature bits
2263 *
2264 * Returns fixed-up features bits
2265 **/
2266 static netdev_features_t i40evf_fix_features(struct net_device *netdev,
2267 netdev_features_t features)
2268 {
2269 struct i40evf_adapter *adapter = netdev_priv(netdev);
2270
2271 features &= ~I40EVF_VLAN_FEATURES;
2272 if (adapter->vf_res->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_VLAN)
2273 features |= I40EVF_VLAN_FEATURES;
2274 return features;
2275 }
2276
2277 static const struct net_device_ops i40evf_netdev_ops = {
2278 .ndo_open = i40evf_open,
2279 .ndo_stop = i40evf_close,
2280 .ndo_start_xmit = i40evf_xmit_frame,
2281 .ndo_get_stats = i40evf_get_stats,
2282 .ndo_set_rx_mode = i40evf_set_rx_mode,
2283 .ndo_validate_addr = eth_validate_addr,
2284 .ndo_set_mac_address = i40evf_set_mac,
2285 .ndo_change_mtu = i40evf_change_mtu,
2286 .ndo_tx_timeout = i40evf_tx_timeout,
2287 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
2288 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
2289 .ndo_features_check = i40evf_features_check,
2290 .ndo_fix_features = i40evf_fix_features,
2291 #ifdef CONFIG_NET_POLL_CONTROLLER
2292 .ndo_poll_controller = i40evf_netpoll,
2293 #endif
2294 };
2295
2296 /**
2297 * i40evf_check_reset_complete - check that VF reset is complete
2298 * @hw: pointer to hw struct
2299 *
2300 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
2301 **/
2302 static int i40evf_check_reset_complete(struct i40e_hw *hw)
2303 {
2304 u32 rstat;
2305 int i;
2306
2307 for (i = 0; i < 100; i++) {
2308 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
2309 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
2310 if ((rstat == I40E_VFR_VFACTIVE) ||
2311 (rstat == I40E_VFR_COMPLETED))
2312 return 0;
2313 usleep_range(10, 20);
2314 }
2315 return -EBUSY;
2316 }
2317
2318 /**
2319 * i40evf_process_config - Process the config information we got from the PF
2320 * @adapter: board private structure
2321 *
2322 * Verify that we have a valid config struct, and set up our netdev features
2323 * and our VSI struct.
2324 **/
2325 int i40evf_process_config(struct i40evf_adapter *adapter)
2326 {
2327 struct i40e_virtchnl_vf_resource *vfres = adapter->vf_res;
2328 struct net_device *netdev = adapter->netdev;
2329 struct i40e_vsi *vsi = &adapter->vsi;
2330 int i;
2331
2332 /* got VF config message back from PF, now we can parse it */
2333 for (i = 0; i < vfres->num_vsis; i++) {
2334 if (vfres->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2335 adapter->vsi_res = &vfres->vsi_res[i];
2336 }
2337 if (!adapter->vsi_res) {
2338 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
2339 return -ENODEV;
2340 }
2341
2342 netdev->hw_enc_features |= NETIF_F_SG |
2343 NETIF_F_IP_CSUM |
2344 NETIF_F_IPV6_CSUM |
2345 NETIF_F_HIGHDMA |
2346 NETIF_F_SOFT_FEATURES |
2347 NETIF_F_TSO |
2348 NETIF_F_TSO_ECN |
2349 NETIF_F_TSO6 |
2350 NETIF_F_GSO_GRE |
2351 NETIF_F_GSO_GRE_CSUM |
2352 NETIF_F_GSO_IPXIP4 |
2353 NETIF_F_GSO_IPXIP6 |
2354 NETIF_F_GSO_UDP_TUNNEL |
2355 NETIF_F_GSO_UDP_TUNNEL_CSUM |
2356 NETIF_F_GSO_PARTIAL |
2357 NETIF_F_SCTP_CRC |
2358 NETIF_F_RXHASH |
2359 NETIF_F_RXCSUM |
2360 0;
2361
2362 if (!(adapter->flags & I40EVF_FLAG_OUTER_UDP_CSUM_CAPABLE))
2363 netdev->gso_partial_features |= NETIF_F_GSO_UDP_TUNNEL_CSUM;
2364
2365 netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
2366
2367 /* record features VLANs can make use of */
2368 netdev->vlan_features |= netdev->hw_enc_features |
2369 NETIF_F_TSO_MANGLEID;
2370
2371 /* Write features and hw_features separately to avoid polluting
2372 * with, or dropping, features that are set when we registgered.
2373 */
2374 netdev->hw_features |= netdev->hw_enc_features;
2375
2376 netdev->features |= netdev->hw_enc_features | I40EVF_VLAN_FEATURES;
2377 netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
2378
2379 /* disable VLAN features if not supported */
2380 if (!(vfres->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_VLAN))
2381 netdev->features ^= I40EVF_VLAN_FEATURES;
2382
2383 adapter->vsi.id = adapter->vsi_res->vsi_id;
2384
2385 adapter->vsi.back = adapter;
2386 adapter->vsi.base_vector = 1;
2387 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2388 vsi->netdev = adapter->netdev;
2389 vsi->qs_handle = adapter->vsi_res->qset_handle;
2390 if (vfres->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_RSS_PF) {
2391 adapter->rss_key_size = vfres->rss_key_size;
2392 adapter->rss_lut_size = vfres->rss_lut_size;
2393 } else {
2394 adapter->rss_key_size = I40EVF_HKEY_ARRAY_SIZE;
2395 adapter->rss_lut_size = I40EVF_HLUT_ARRAY_SIZE;
2396 }
2397
2398 return 0;
2399 }
2400
2401 /**
2402 * i40evf_init_task - worker thread to perform delayed initialization
2403 * @work: pointer to work_struct containing our data
2404 *
2405 * This task completes the work that was begun in probe. Due to the nature
2406 * of VF-PF communications, we may need to wait tens of milliseconds to get
2407 * responses back from the PF. Rather than busy-wait in probe and bog down the
2408 * whole system, we'll do it in a task so we can sleep.
2409 * This task only runs during driver init. Once we've established
2410 * communications with the PF driver and set up our netdev, the watchdog
2411 * takes over.
2412 **/
2413 static void i40evf_init_task(struct work_struct *work)
2414 {
2415 struct i40evf_adapter *adapter = container_of(work,
2416 struct i40evf_adapter,
2417 init_task.work);
2418 struct net_device *netdev = adapter->netdev;
2419 struct i40e_hw *hw = &adapter->hw;
2420 struct pci_dev *pdev = adapter->pdev;
2421 int err, bufsz;
2422
2423 switch (adapter->state) {
2424 case __I40EVF_STARTUP:
2425 /* driver loaded, probe complete */
2426 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2427 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2428 err = i40e_set_mac_type(hw);
2429 if (err) {
2430 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2431 err);
2432 goto err;
2433 }
2434 err = i40evf_check_reset_complete(hw);
2435 if (err) {
2436 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2437 err);
2438 goto err;
2439 }
2440 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2441 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2442 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2443 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2444
2445 err = i40evf_init_adminq(hw);
2446 if (err) {
2447 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2448 err);
2449 goto err;
2450 }
2451 err = i40evf_send_api_ver(adapter);
2452 if (err) {
2453 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2454 i40evf_shutdown_adminq(hw);
2455 goto err;
2456 }
2457 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2458 goto restart;
2459 case __I40EVF_INIT_VERSION_CHECK:
2460 if (!i40evf_asq_done(hw)) {
2461 dev_err(&pdev->dev, "Admin queue command never completed\n");
2462 i40evf_shutdown_adminq(hw);
2463 adapter->state = __I40EVF_STARTUP;
2464 goto err;
2465 }
2466
2467 /* aq msg sent, awaiting reply */
2468 err = i40evf_verify_api_ver(adapter);
2469 if (err) {
2470 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2471 err = i40evf_send_api_ver(adapter);
2472 else
2473 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
2474 adapter->pf_version.major,
2475 adapter->pf_version.minor,
2476 I40E_VIRTCHNL_VERSION_MAJOR,
2477 I40E_VIRTCHNL_VERSION_MINOR);
2478 goto err;
2479 }
2480 err = i40evf_send_vf_config_msg(adapter);
2481 if (err) {
2482 dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2483 err);
2484 goto err;
2485 }
2486 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2487 goto restart;
2488 case __I40EVF_INIT_GET_RESOURCES:
2489 /* aq msg sent, awaiting reply */
2490 if (!adapter->vf_res) {
2491 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2492 (I40E_MAX_VF_VSI *
2493 sizeof(struct i40e_virtchnl_vsi_resource));
2494 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2495 if (!adapter->vf_res)
2496 goto err;
2497 }
2498 err = i40evf_get_vf_config(adapter);
2499 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2500 err = i40evf_send_vf_config_msg(adapter);
2501 goto err;
2502 } else if (err == I40E_ERR_PARAM) {
2503 /* We only get ERR_PARAM if the device is in a very bad
2504 * state or if we've been disabled for previous bad
2505 * behavior. Either way, we're done now.
2506 */
2507 i40evf_shutdown_adminq(hw);
2508 dev_err(&pdev->dev, "Unable to get VF config due to PF error condition, not retrying\n");
2509 return;
2510 }
2511 if (err) {
2512 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2513 err);
2514 goto err_alloc;
2515 }
2516 adapter->state = __I40EVF_INIT_SW;
2517 break;
2518 default:
2519 goto err_alloc;
2520 }
2521
2522 if (hw->mac.type == I40E_MAC_X722_VF)
2523 adapter->flags |= I40EVF_FLAG_OUTER_UDP_CSUM_CAPABLE;
2524
2525 if (i40evf_process_config(adapter))
2526 goto err_alloc;
2527 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
2528
2529 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2530
2531 netdev->netdev_ops = &i40evf_netdev_ops;
2532 i40evf_set_ethtool_ops(netdev);
2533 netdev->watchdog_timeo = 5 * HZ;
2534
2535 /* MTU range: 68 - 9710 */
2536 netdev->min_mtu = ETH_MIN_MTU;
2537 netdev->max_mtu = I40E_MAX_RXBUFFER - (ETH_HLEN + ETH_FCS_LEN);
2538
2539 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2540 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2541 adapter->hw.mac.addr);
2542 eth_hw_addr_random(netdev);
2543 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
2544 } else {
2545 adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF;
2546 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2547 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2548 }
2549
2550 init_timer(&adapter->watchdog_timer);
2551 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2552 adapter->watchdog_timer.data = (unsigned long)adapter;
2553 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2554
2555 adapter->num_active_queues = min_t(int,
2556 adapter->vsi_res->num_queue_pairs,
2557 (int)(num_online_cpus()));
2558 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2559 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2560 err = i40evf_init_interrupt_scheme(adapter);
2561 if (err)
2562 goto err_sw_init;
2563 i40evf_map_rings_to_vectors(adapter);
2564 if (adapter->vf_res->vf_offload_flags &
2565 I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
2566 adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
2567
2568 err = i40evf_request_misc_irq(adapter);
2569 if (err)
2570 goto err_sw_init;
2571
2572 netif_carrier_off(netdev);
2573 adapter->link_up = false;
2574
2575 if (!adapter->netdev_registered) {
2576 err = register_netdev(netdev);
2577 if (err)
2578 goto err_register;
2579 }
2580
2581 adapter->netdev_registered = true;
2582
2583 netif_tx_stop_all_queues(netdev);
2584
2585 dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2586 if (netdev->features & NETIF_F_GRO)
2587 dev_info(&pdev->dev, "GRO is enabled\n");
2588
2589 adapter->state = __I40EVF_DOWN;
2590 set_bit(__I40E_DOWN, &adapter->vsi.state);
2591 i40evf_misc_irq_enable(adapter);
2592
2593 adapter->rss_key = kzalloc(adapter->rss_key_size, GFP_KERNEL);
2594 adapter->rss_lut = kzalloc(adapter->rss_lut_size, GFP_KERNEL);
2595 if (!adapter->rss_key || !adapter->rss_lut)
2596 goto err_mem;
2597
2598 if (RSS_AQ(adapter)) {
2599 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
2600 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
2601 } else {
2602 i40evf_init_rss(adapter);
2603 }
2604 return;
2605 restart:
2606 schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
2607 return;
2608 err_mem:
2609 i40evf_free_rss(adapter);
2610 err_register:
2611 i40evf_free_misc_irq(adapter);
2612 err_sw_init:
2613 i40evf_reset_interrupt_capability(adapter);
2614 err_alloc:
2615 kfree(adapter->vf_res);
2616 adapter->vf_res = NULL;
2617 err:
2618 /* Things went into the weeds, so try again later */
2619 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2620 dev_err(&pdev->dev, "Failed to communicate with PF; waiting before retry\n");
2621 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2622 i40evf_shutdown_adminq(hw);
2623 adapter->state = __I40EVF_STARTUP;
2624 schedule_delayed_work(&adapter->init_task, HZ * 5);
2625 return;
2626 }
2627 schedule_delayed_work(&adapter->init_task, HZ);
2628 }
2629
2630 /**
2631 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2632 * @pdev: pci device structure
2633 **/
2634 static void i40evf_shutdown(struct pci_dev *pdev)
2635 {
2636 struct net_device *netdev = pci_get_drvdata(pdev);
2637 struct i40evf_adapter *adapter = netdev_priv(netdev);
2638
2639 netif_device_detach(netdev);
2640
2641 if (netif_running(netdev))
2642 i40evf_close(netdev);
2643
2644 /* Prevent the watchdog from running. */
2645 adapter->state = __I40EVF_REMOVE;
2646 adapter->aq_required = 0;
2647
2648 #ifdef CONFIG_PM
2649 pci_save_state(pdev);
2650
2651 #endif
2652 pci_disable_device(pdev);
2653 }
2654
2655 /**
2656 * i40evf_probe - Device Initialization Routine
2657 * @pdev: PCI device information struct
2658 * @ent: entry in i40evf_pci_tbl
2659 *
2660 * Returns 0 on success, negative on failure
2661 *
2662 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2663 * The OS initialization, configuring of the adapter private structure,
2664 * and a hardware reset occur.
2665 **/
2666 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2667 {
2668 struct net_device *netdev;
2669 struct i40evf_adapter *adapter = NULL;
2670 struct i40e_hw *hw = NULL;
2671 int err;
2672
2673 err = pci_enable_device(pdev);
2674 if (err)
2675 return err;
2676
2677 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2678 if (err) {
2679 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2680 if (err) {
2681 dev_err(&pdev->dev,
2682 "DMA configuration failed: 0x%x\n", err);
2683 goto err_dma;
2684 }
2685 }
2686
2687 err = pci_request_regions(pdev, i40evf_driver_name);
2688 if (err) {
2689 dev_err(&pdev->dev,
2690 "pci_request_regions failed 0x%x\n", err);
2691 goto err_pci_reg;
2692 }
2693
2694 pci_enable_pcie_error_reporting(pdev);
2695
2696 pci_set_master(pdev);
2697
2698 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter), MAX_QUEUES);
2699 if (!netdev) {
2700 err = -ENOMEM;
2701 goto err_alloc_etherdev;
2702 }
2703
2704 SET_NETDEV_DEV(netdev, &pdev->dev);
2705
2706 pci_set_drvdata(pdev, netdev);
2707 adapter = netdev_priv(netdev);
2708
2709 adapter->netdev = netdev;
2710 adapter->pdev = pdev;
2711
2712 hw = &adapter->hw;
2713 hw->back = adapter;
2714
2715 adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2716 adapter->state = __I40EVF_STARTUP;
2717
2718 /* Call save state here because it relies on the adapter struct. */
2719 pci_save_state(pdev);
2720
2721 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2722 pci_resource_len(pdev, 0));
2723 if (!hw->hw_addr) {
2724 err = -EIO;
2725 goto err_ioremap;
2726 }
2727 hw->vendor_id = pdev->vendor;
2728 hw->device_id = pdev->device;
2729 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2730 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2731 hw->subsystem_device_id = pdev->subsystem_device;
2732 hw->bus.device = PCI_SLOT(pdev->devfn);
2733 hw->bus.func = PCI_FUNC(pdev->devfn);
2734 hw->bus.bus_id = pdev->bus->number;
2735
2736 /* set up the locks for the AQ, do this only once in probe
2737 * and destroy them only once in remove
2738 */
2739 mutex_init(&hw->aq.asq_mutex);
2740 mutex_init(&hw->aq.arq_mutex);
2741
2742 INIT_LIST_HEAD(&adapter->mac_filter_list);
2743 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2744
2745 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2746 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2747 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2748 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2749 schedule_delayed_work(&adapter->init_task,
2750 msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
2751
2752 return 0;
2753
2754 err_ioremap:
2755 free_netdev(netdev);
2756 err_alloc_etherdev:
2757 pci_release_regions(pdev);
2758 err_pci_reg:
2759 err_dma:
2760 pci_disable_device(pdev);
2761 return err;
2762 }
2763
2764 #ifdef CONFIG_PM
2765 /**
2766 * i40evf_suspend - Power management suspend routine
2767 * @pdev: PCI device information struct
2768 * @state: unused
2769 *
2770 * Called when the system (VM) is entering sleep/suspend.
2771 **/
2772 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2773 {
2774 struct net_device *netdev = pci_get_drvdata(pdev);
2775 struct i40evf_adapter *adapter = netdev_priv(netdev);
2776 int retval = 0;
2777
2778 netif_device_detach(netdev);
2779
2780 if (netif_running(netdev)) {
2781 rtnl_lock();
2782 i40evf_down(adapter);
2783 rtnl_unlock();
2784 }
2785 i40evf_free_misc_irq(adapter);
2786 i40evf_reset_interrupt_capability(adapter);
2787
2788 retval = pci_save_state(pdev);
2789 if (retval)
2790 return retval;
2791
2792 pci_disable_device(pdev);
2793
2794 return 0;
2795 }
2796
2797 /**
2798 * i40evf_resume - Power management resume routine
2799 * @pdev: PCI device information struct
2800 *
2801 * Called when the system (VM) is resumed from sleep/suspend.
2802 **/
2803 static int i40evf_resume(struct pci_dev *pdev)
2804 {
2805 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2806 struct net_device *netdev = adapter->netdev;
2807 u32 err;
2808
2809 pci_set_power_state(pdev, PCI_D0);
2810 pci_restore_state(pdev);
2811 /* pci_restore_state clears dev->state_saved so call
2812 * pci_save_state to restore it.
2813 */
2814 pci_save_state(pdev);
2815
2816 err = pci_enable_device_mem(pdev);
2817 if (err) {
2818 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2819 return err;
2820 }
2821 pci_set_master(pdev);
2822
2823 rtnl_lock();
2824 err = i40evf_set_interrupt_capability(adapter);
2825 if (err) {
2826 rtnl_unlock();
2827 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2828 return err;
2829 }
2830 err = i40evf_request_misc_irq(adapter);
2831 rtnl_unlock();
2832 if (err) {
2833 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2834 return err;
2835 }
2836
2837 schedule_work(&adapter->reset_task);
2838
2839 netif_device_attach(netdev);
2840
2841 return err;
2842 }
2843
2844 #endif /* CONFIG_PM */
2845 /**
2846 * i40evf_remove - Device Removal Routine
2847 * @pdev: PCI device information struct
2848 *
2849 * i40evf_remove is called by the PCI subsystem to alert the driver
2850 * that it should release a PCI device. The could be caused by a
2851 * Hot-Plug event, or because the driver is going to be removed from
2852 * memory.
2853 **/
2854 static void i40evf_remove(struct pci_dev *pdev)
2855 {
2856 struct net_device *netdev = pci_get_drvdata(pdev);
2857 struct i40evf_adapter *adapter = netdev_priv(netdev);
2858 struct i40evf_mac_filter *f, *ftmp;
2859 struct i40e_hw *hw = &adapter->hw;
2860
2861 cancel_delayed_work_sync(&adapter->init_task);
2862 cancel_work_sync(&adapter->reset_task);
2863
2864 if (adapter->netdev_registered) {
2865 unregister_netdev(netdev);
2866 adapter->netdev_registered = false;
2867 }
2868
2869 /* Shut down all the garbage mashers on the detention level */
2870 adapter->state = __I40EVF_REMOVE;
2871 adapter->aq_required = 0;
2872 i40evf_request_reset(adapter);
2873 msleep(50);
2874 /* If the FW isn't responding, kick it once, but only once. */
2875 if (!i40evf_asq_done(hw)) {
2876 i40evf_request_reset(adapter);
2877 msleep(50);
2878 }
2879 i40evf_free_all_tx_resources(adapter);
2880 i40evf_free_all_rx_resources(adapter);
2881 i40evf_misc_irq_disable(adapter);
2882 i40evf_free_misc_irq(adapter);
2883 i40evf_reset_interrupt_capability(adapter);
2884 i40evf_free_q_vectors(adapter);
2885
2886 if (adapter->watchdog_timer.function)
2887 del_timer_sync(&adapter->watchdog_timer);
2888
2889 flush_scheduled_work();
2890
2891 i40evf_free_rss(adapter);
2892
2893 if (hw->aq.asq.count)
2894 i40evf_shutdown_adminq(hw);
2895
2896 /* destroy the locks only once, here */
2897 mutex_destroy(&hw->aq.arq_mutex);
2898 mutex_destroy(&hw->aq.asq_mutex);
2899
2900 iounmap(hw->hw_addr);
2901 pci_release_regions(pdev);
2902 i40evf_free_all_tx_resources(adapter);
2903 i40evf_free_all_rx_resources(adapter);
2904 i40evf_free_queues(adapter);
2905 kfree(adapter->vf_res);
2906 /* If we got removed before an up/down sequence, we've got a filter
2907 * hanging out there that we need to get rid of.
2908 */
2909 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2910 list_del(&f->list);
2911 kfree(f);
2912 }
2913 list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2914 list_del(&f->list);
2915 kfree(f);
2916 }
2917
2918 free_netdev(netdev);
2919
2920 pci_disable_pcie_error_reporting(pdev);
2921
2922 pci_disable_device(pdev);
2923 }
2924
2925 static struct pci_driver i40evf_driver = {
2926 .name = i40evf_driver_name,
2927 .id_table = i40evf_pci_tbl,
2928 .probe = i40evf_probe,
2929 .remove = i40evf_remove,
2930 #ifdef CONFIG_PM
2931 .suspend = i40evf_suspend,
2932 .resume = i40evf_resume,
2933 #endif
2934 .shutdown = i40evf_shutdown,
2935 };
2936
2937 /**
2938 * i40e_init_module - Driver Registration Routine
2939 *
2940 * i40e_init_module is the first routine called when the driver is
2941 * loaded. All it does is register with the PCI subsystem.
2942 **/
2943 static int __init i40evf_init_module(void)
2944 {
2945 int ret;
2946
2947 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2948 i40evf_driver_version);
2949
2950 pr_info("%s\n", i40evf_copyright);
2951
2952 i40evf_wq = alloc_workqueue("%s", WQ_UNBOUND | WQ_MEM_RECLAIM, 1,
2953 i40evf_driver_name);
2954 if (!i40evf_wq) {
2955 pr_err("%s: Failed to create workqueue\n", i40evf_driver_name);
2956 return -ENOMEM;
2957 }
2958 ret = pci_register_driver(&i40evf_driver);
2959 return ret;
2960 }
2961
2962 module_init(i40evf_init_module);
2963
2964 /**
2965 * i40e_exit_module - Driver Exit Cleanup Routine
2966 *
2967 * i40e_exit_module is called just before the driver is removed
2968 * from memory.
2969 **/
2970 static void __exit i40evf_exit_module(void)
2971 {
2972 pci_unregister_driver(&i40evf_driver);
2973 destroy_workqueue(i40evf_wq);
2974 }
2975
2976 module_exit(i40evf_exit_module);
2977
2978 /* i40evf_main.c */
Linux with added FPC-III support