projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
i40e: make error message more useful
[deliverable/linux.git] / drivers / net / ethernet / intel / i40evf / i40evf_main.c
CommitLineData
5eae00c5
GR		 1/*******************************************************************************
2 *
3 * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
5b8eb176 4 * Copyright(c) 2013 - 2015 Intel Corporation.
5eae00c5
GR		 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 *
b831607d
JB		 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 *
5eae00c5
GR		 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[] =
0af56f44 35 "Intel(R) XL710/X710 Virtual Function Network Driver";
5eae00c5 36
0e320516 37#define DRV_VERSION "1.3.33"
5eae00c5
GR		 38const char i40evf_driver_version[] = DRV_VERSION;
39static const char i40evf_copyright[] =
bf41846e 40 "Copyright (c) 2013 - 2015 Intel Corporation.";
5eae00c5
GR		 41
42/* i40evf_pci_tbl - PCI Device ID Table
43 *
44 * Wildcard entries (PCI_ANY_ID) should come last
45 * Last entry must be all 0s
46 *
47 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
48 * Class, Class Mask, private data (not used) }
49 */
9baa3c34 50static const struct pci_device_id i40evf_pci_tbl[] = {
ab60085e 51 {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
87e6c1d7 52 {PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF), 0},
5eae00c5
GR		 53 /* required last entry */
54 {0, }
55};
56
57MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
58
59MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
60MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
61MODULE_LICENSE("GPL");
62MODULE_VERSION(DRV_VERSION);
63
64/**
65 * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
66 * @hw: pointer to the HW structure
67 * @mem: ptr to mem struct to fill out
68 * @size: size of memory requested
69 * @alignment: what to align the allocation to
70 **/
71i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
72 struct i40e_dma_mem *mem,
73 u64 size, u32 alignment)
74{
75 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
76
77 if (!mem)
78 return I40E_ERR_PARAM;
79
80 mem->size = ALIGN(size, alignment);
81 mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
82 (dma_addr_t *)&mem->pa, GFP_KERNEL);
83 if (mem->va)
84 return 0;
85 else
86 return I40E_ERR_NO_MEMORY;
87}
88
89/**
90 * i40evf_free_dma_mem_d - OS specific memory free for shared code
91 * @hw: pointer to the HW structure
92 * @mem: ptr to mem struct to free
93 **/
94i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
95{
96 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
97
98 if (!mem || !mem->va)
99 return I40E_ERR_PARAM;
100 dma_free_coherent(&adapter->pdev->dev, mem->size,
101 mem->va, (dma_addr_t)mem->pa);
102 return 0;
103}
104
105/**
106 * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
107 * @hw: pointer to the HW structure
108 * @mem: ptr to mem struct to fill out
109 * @size: size of memory requested
110 **/
111i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
112 struct i40e_virt_mem *mem, u32 size)
113{
114 if (!mem)
115 return I40E_ERR_PARAM;
116
117 mem->size = size;
118 mem->va = kzalloc(size, GFP_KERNEL);
119
120 if (mem->va)
121 return 0;
122 else
123 return I40E_ERR_NO_MEMORY;
124}
125
126/**
127 * i40evf_free_virt_mem_d - OS specific memory free for shared code
128 * @hw: pointer to the HW structure
129 * @mem: ptr to mem struct to free
130 **/
131i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
132 struct i40e_virt_mem *mem)
133{
134 if (!mem)
135 return I40E_ERR_PARAM;
136
137 /* it's ok to kfree a NULL pointer */
138 kfree(mem->va);
139
140 return 0;
141}
142
143/**
144 * i40evf_debug_d - OS dependent version of debug printing
145 * @hw: pointer to the HW structure
146 * @mask: debug level mask
147 * @fmt_str: printf-type format description
148 **/
149void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
150{
151 char buf[512];
152 va_list argptr;
153
154 if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
155 return;
156
157 va_start(argptr, fmt_str);
158 vsnprintf(buf, sizeof(buf), fmt_str, argptr);
159 va_end(argptr);
160
161 /* the debug string is already formatted with a newline */
162 pr_info("%s", buf);
163}
164
165/**
166 * i40evf_tx_timeout - Respond to a Tx Hang
167 * @netdev: network interface device structure
168 **/
169static void i40evf_tx_timeout(struct net_device *netdev)
170{
171 struct i40evf_adapter *adapter = netdev_priv(netdev);
172
173 adapter->tx_timeout_count++;
67c818a1
MW		 174 if (!(adapter->flags & (I40EVF_FLAG_RESET_PENDING |
175 I40EVF_FLAG_RESET_NEEDED))) {
3526d800 176 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
625777e3
MW		 177 schedule_work(&adapter->reset_task);
178 }
5eae00c5
GR		 179}
180
181/**
182 * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
183 * @adapter: board private structure
184 **/
185static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
186{
187 struct i40e_hw *hw = &adapter->hw;
75a64435 188
5eae00c5
GR		 189 wr32(hw, I40E_VFINT_DYN_CTL01, 0);
190
191 /* read flush */
192 rd32(hw, I40E_VFGEN_RSTAT);
193
194 synchronize_irq(adapter->msix_entries[0].vector);
195}
196
197/**
198 * i40evf_misc_irq_enable - Enable default interrupt generation settings
199 * @adapter: board private structure
200 **/
201static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
202{
203 struct i40e_hw *hw = &adapter->hw;
75a64435 204
5eae00c5
GR		 205 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
206 I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
b1f3366b 207 wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA1_ADMINQ_MASK);
5eae00c5
GR		 208
209 /* read flush */
210 rd32(hw, I40E_VFGEN_RSTAT);
211}
212
213/**
214 * i40evf_irq_disable - Mask off interrupt generation on the NIC
215 * @adapter: board private structure
216 **/
217static void i40evf_irq_disable(struct i40evf_adapter *adapter)
218{
219 int i;
220 struct i40e_hw *hw = &adapter->hw;
221
dbb01c8a
MW		 222 if (!adapter->msix_entries)
223 return;
224
5eae00c5
GR		 225 for (i = 1; i < adapter->num_msix_vectors; i++) {
226 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
227 synchronize_irq(adapter->msix_entries[i].vector);
228 }
229 /* read flush */
230 rd32(hw, I40E_VFGEN_RSTAT);
5eae00c5
GR		 231}
232
233/**
234 * i40evf_irq_enable_queues - Enable interrupt for specified queues
235 * @adapter: board private structure
236 * @mask: bitmap of queues to enable
237 **/
238void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
239{
240 struct i40e_hw *hw = &adapter->hw;
241 int i;
242
243 for (i = 1; i < adapter->num_msix_vectors; i++) {
41a1d04b 244 if (mask & BIT(i - 1)) {
5eae00c5
GR		 245 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
246 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
97bf75f1 247 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
b1f3366b 248 I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK);
5eae00c5
GR		 249 }
250 }
251}
252
253/**
254 * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
255 * @adapter: board private structure
256 * @mask: bitmap of vectors to trigger
257 **/
75a64435 258static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
5eae00c5
GR		 259{
260 struct i40e_hw *hw = &adapter->hw;
261 int i;
262 uint32_t dyn_ctl;
263
164ec1bf
MW		 264 if (mask & 1) {
265 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
b1f3366b 266 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
97bf75f1 267 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
b1f3366b 268 I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
164ec1bf
MW		 269 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
270 }
5eae00c5 271 for (i = 1; i < adapter->num_msix_vectors; i++) {
41a1d04b 272 if (mask & BIT(i)) {
5eae00c5 273 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
b1f3366b 274 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
97bf75f1 275 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
b1f3366b 276 I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
5eae00c5
GR		 277 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
278 }
279 }
280}
281
282/**
283 * i40evf_irq_enable - Enable default interrupt generation settings
284 * @adapter: board private structure
69c1d70a 285 * @flush: boolean value whether to run rd32()
5eae00c5
GR		 286 **/
287void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
288{
289 struct i40e_hw *hw = &adapter->hw;
290
164ec1bf 291 i40evf_misc_irq_enable(adapter);
5eae00c5
GR		 292 i40evf_irq_enable_queues(adapter, ~0);
293
294 if (flush)
295 rd32(hw, I40E_VFGEN_RSTAT);
296}
297
298/**
299 * i40evf_msix_aq - Interrupt handler for vector 0
300 * @irq: interrupt number
301 * @data: pointer to netdev
302 **/
303static irqreturn_t i40evf_msix_aq(int irq, void *data)
304{
305 struct net_device *netdev = data;
306 struct i40evf_adapter *adapter = netdev_priv(netdev);
307 struct i40e_hw *hw = &adapter->hw;
308 u32 val;
5eae00c5 309
cfbe4dba
JB		 310 /* handle non-queue interrupts, these reads clear the registers */
311 val = rd32(hw, I40E_VFINT_ICR01);
312 val = rd32(hw, I40E_VFINT_ICR0_ENA1);
5eae00c5 313
ed17f7e5
JS		 314 val = rd32(hw, I40E_VFINT_DYN_CTL01) |
315 I40E_VFINT_DYN_CTL01_CLEARPBA_MASK;
5eae00c5
GR		 316 wr32(hw, I40E_VFINT_DYN_CTL01, val);
317
5eae00c5
GR		 318 /* schedule work on the private workqueue */
319 schedule_work(&adapter->adminq_task);
320
321 return IRQ_HANDLED;
322}
323
324/**
325 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
326 * @irq: interrupt number
327 * @data: pointer to a q_vector
328 **/
329static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
330{
331 struct i40e_q_vector *q_vector = data;
332
333 if (!q_vector->tx.ring && !q_vector->rx.ring)
334 return IRQ_HANDLED;
335
5d3465a1 336 napi_schedule_irqoff(&q_vector->napi);
5eae00c5
GR		 337
338 return IRQ_HANDLED;
339}
340
341/**
342 * i40evf_map_vector_to_rxq - associate irqs with rx queues
343 * @adapter: board private structure
344 * @v_idx: interrupt number
345 * @r_idx: queue number
346 **/
347static void
348i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
349{
350 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
351 struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
352
353 rx_ring->q_vector = q_vector;
354 rx_ring->next = q_vector->rx.ring;
355 rx_ring->vsi = &adapter->vsi;
356 q_vector->rx.ring = rx_ring;
357 q_vector->rx.count++;
358 q_vector->rx.latency_range = I40E_LOW_LATENCY;
ee2319cf 359 q_vector->itr_countdown = ITR_COUNTDOWN_START;
5eae00c5
GR		 360}
361
362/**
363 * i40evf_map_vector_to_txq - associate irqs with tx queues
364 * @adapter: board private structure
365 * @v_idx: interrupt number
366 * @t_idx: queue number
367 **/
368static void
369i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
370{
371 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
372 struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
373
374 tx_ring->q_vector = q_vector;
375 tx_ring->next = q_vector->tx.ring;
376 tx_ring->vsi = &adapter->vsi;
377 q_vector->tx.ring = tx_ring;
378 q_vector->tx.count++;
379 q_vector->tx.latency_range = I40E_LOW_LATENCY;
ee2319cf 380 q_vector->itr_countdown = ITR_COUNTDOWN_START;
5eae00c5 381 q_vector->num_ringpairs++;
41a1d04b 382 q_vector->ring_mask |= BIT(t_idx);
5eae00c5
GR		 383}
384
385/**
386 * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
387 * @adapter: board private structure to initialize
388 *
389 * This function maps descriptor rings to the queue-specific vectors
390 * we were allotted through the MSI-X enabling code. Ideally, we'd have
391 * one vector per ring/queue, but on a constrained vector budget, we
392 * group the rings as "efficiently" as possible. You would add new
393 * mapping configurations in here.
394 **/
395static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
396{
397 int q_vectors;
398 int v_start = 0;
399 int rxr_idx = 0, txr_idx = 0;
cc052927
MW		 400 int rxr_remaining = adapter->num_active_queues;
401 int txr_remaining = adapter->num_active_queues;
5eae00c5
GR		 402 int i, j;
403 int rqpv, tqpv;
404 int err = 0;
405
406 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
407
408 /* The ideal configuration...
409 * We have enough vectors to map one per queue.
410 */
973371da 411 if (q_vectors >= (rxr_remaining * 2)) {
5eae00c5
GR		 412 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
413 i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
414
415 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
416 i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
417 goto out;
418 }
419
420 /* If we don't have enough vectors for a 1-to-1
421 * mapping, we'll have to group them so there are
422 * multiple queues per vector.
423 * Re-adjusting *qpv takes care of the remainder.
424 */
425 for (i = v_start; i < q_vectors; i++) {
426 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
427 for (j = 0; j < rqpv; j++) {
428 i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
429 rxr_idx++;
430 rxr_remaining--;
431 }
432 }
433 for (i = v_start; i < q_vectors; i++) {
434 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
435 for (j = 0; j < tqpv; j++) {
436 i40evf_map_vector_to_txq(adapter, i, txr_idx);
437 txr_idx++;
438 txr_remaining--;
439 }
440 }
441
442out:
443 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
444
445 return err;
446}
447
7709b4c1
AD		 448#ifdef CONFIG_NET_POLL_CONTROLLER
449/**
450 * i40evf_netpoll - A Polling 'interrupt' handler
451 * @netdev: network interface device structure
452 *
453 * This is used by netconsole to send skbs without having to re-enable
454 * interrupts. It's not called while the normal interrupt routine is executing.
455 **/
456static void i40evf_netpoll(struct net_device *netdev)
457{
458 struct i40evf_adapter *adapter = netdev_priv(netdev);
459 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
460 int i;
461
462 /* if interface is down do nothing */
463 if (test_bit(__I40E_DOWN, &adapter->vsi.state))
464 return;
465
466 for (i = 0; i < q_vectors; i++)
467 i40evf_msix_clean_rings(0, adapter->q_vector[i]);
468}
469
470#endif
5eae00c5
GR		 471/**
472 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
473 * @adapter: board private structure
474 *
475 * Allocates MSI-X vectors for tx and rx handling, and requests
476 * interrupts from the kernel.
477 **/
478static int
479i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
480{
481 int vector, err, q_vectors;
482 int rx_int_idx = 0, tx_int_idx = 0;
483
484 i40evf_irq_disable(adapter);
485 /* Decrement for Other and TCP Timer vectors */
486 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
487
488 for (vector = 0; vector < q_vectors; vector++) {
489 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
490
491 if (q_vector->tx.ring && q_vector->rx.ring) {
492 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
493 "i40evf-%s-%s-%d", basename,
494 "TxRx", rx_int_idx++);
495 tx_int_idx++;
496 } else if (q_vector->rx.ring) {
497 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
498 "i40evf-%s-%s-%d", basename,
499 "rx", rx_int_idx++);
500 } else if (q_vector->tx.ring) {
501 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
502 "i40evf-%s-%s-%d", basename,
503 "tx", tx_int_idx++);
504 } else {
505 /* skip this unused q_vector */
506 continue;
507 }
508 err = request_irq(
509 adapter->msix_entries[vector + NONQ_VECS].vector,
510 i40evf_msix_clean_rings,
511 0,
512 q_vector->name,
513 q_vector);
514 if (err) {
515 dev_info(&adapter->pdev->dev,
fb43201f 516 "Request_irq failed, error: %d\n", err);
5eae00c5
GR		 517 goto free_queue_irqs;
518 }
519 /* assign the mask for this irq */
520 irq_set_affinity_hint(
521 adapter->msix_entries[vector + NONQ_VECS].vector,
522 q_vector->affinity_mask);
523 }
524
525 return 0;
526
527free_queue_irqs:
528 while (vector) {
529 vector--;
530 irq_set_affinity_hint(
531 adapter->msix_entries[vector + NONQ_VECS].vector,
532 NULL);
533 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
534 adapter->q_vector[vector]);
535 }
536 return err;
537}
538
539/**
540 * i40evf_request_misc_irq - Initialize MSI-X interrupts
541 * @adapter: board private structure
542 *
543 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
544 * vector is only for the admin queue, and stays active even when the netdev
545 * is closed.
546 **/
547static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
548{
549 struct net_device *netdev = adapter->netdev;
550 int err;
551
b39c1e2c 552 snprintf(adapter->misc_vector_name,
9a21a007
CW		 553 sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
554 dev_name(&adapter->pdev->dev));
5eae00c5 555 err = request_irq(adapter->msix_entries[0].vector,
e1dfee8e
MW		 556 &i40evf_msix_aq, 0,
557 adapter->misc_vector_name, netdev);
5eae00c5
GR		 558 if (err) {
559 dev_err(&adapter->pdev->dev,
77fa28be
CS		 560 "request_irq for %s failed: %d\n",
561 adapter->misc_vector_name, err);
5eae00c5
GR		 562 free_irq(adapter->msix_entries[0].vector, netdev);
563 }
564 return err;
565}
566
567/**
568 * i40evf_free_traffic_irqs - Free MSI-X interrupts
569 * @adapter: board private structure
570 *
571 * Frees all MSI-X vectors other than 0.
572 **/
573static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
574{
575 int i;
576 int q_vectors;
75a64435 577
5eae00c5
GR		 578 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
579
580 for (i = 0; i < q_vectors; i++) {
581 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
582 NULL);
583 free_irq(adapter->msix_entries[i+1].vector,
584 adapter->q_vector[i]);
585 }
586}
587
588/**
589 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
590 * @adapter: board private structure
591 *
592 * Frees MSI-X vector 0.
593 **/
594static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
595{
596 struct net_device *netdev = adapter->netdev;
597
598 free_irq(adapter->msix_entries[0].vector, netdev);
599}
600
601/**
602 * i40evf_configure_tx - Configure Transmit Unit after Reset
603 * @adapter: board private structure
604 *
605 * Configure the Tx unit of the MAC after a reset.
606 **/
607static void i40evf_configure_tx(struct i40evf_adapter *adapter)
608{
609 struct i40e_hw *hw = &adapter->hw;
610 int i;
75a64435 611
cc052927 612 for (i = 0; i < adapter->num_active_queues; i++)
5eae00c5
GR		 613 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
614}
615
616/**
617 * i40evf_configure_rx - Configure Receive Unit after Reset
618 * @adapter: board private structure
619 *
620 * Configure the Rx unit of the MAC after a reset.
621 **/
622static void i40evf_configure_rx(struct i40evf_adapter *adapter)
623{
624 struct i40e_hw *hw = &adapter->hw;
625 struct net_device *netdev = adapter->netdev;
626 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
627 int i;
628 int rx_buf_len;
629
630
631 adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
632 adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
633
634 /* Decide whether to use packet split mode or not */
635 if (netdev->mtu > ETH_DATA_LEN) {
636 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
637 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
638 else
639 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
640 } else {
641 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
642 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
643 else
644 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
645 }
646
647 /* Set the RX buffer length according to the mode */
648 if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
649 rx_buf_len = I40E_RX_HDR_SIZE;
650 } else {
651 if (netdev->mtu <= ETH_DATA_LEN)
652 rx_buf_len = I40EVF_RXBUFFER_2048;
653 else
654 rx_buf_len = ALIGN(max_frame, 1024);
655 }
656
cc052927 657 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5
GR		 658 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
659 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
660 }
661}
662
663/**
664 * i40evf_find_vlan - Search filter list for specific vlan filter
665 * @adapter: board private structure
666 * @vlan: vlan tag
667 *
668 * Returns ptr to the filter object or NULL
669 **/
670static struct
671i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
672{
673 struct i40evf_vlan_filter *f;
674
675 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
676 if (vlan == f->vlan)
677 return f;
678 }
679 return NULL;
680}
681
682/**
683 * i40evf_add_vlan - Add a vlan filter to the list
684 * @adapter: board private structure
685 * @vlan: VLAN tag
686 *
687 * Returns ptr to the filter object or NULL when no memory available.
688 **/
689static struct
690i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
691{
13acb546
MW		 692 struct i40evf_vlan_filter *f = NULL;
693 int count = 50;
694
695 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
696 &adapter->crit_section)) {
697 udelay(1);
698 if (--count == 0)
699 goto out;
700 }
5eae00c5
GR		 701
702 f = i40evf_find_vlan(adapter, vlan);
348d4994 703 if (!f) {
5eae00c5 704 f = kzalloc(sizeof(*f), GFP_ATOMIC);
348d4994 705 if (!f)
13acb546 706 goto clearout;
249c8b8d 707
5eae00c5
GR		 708 f->vlan = vlan;
709
710 INIT_LIST_HEAD(&f->list);
711 list_add(&f->list, &adapter->vlan_filter_list);
712 f->add = true;
713 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
714 }
715
13acb546
MW		 716clearout:
717 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
718out:
5eae00c5
GR		 719 return f;
720}
721
722/**
723 * i40evf_del_vlan - Remove a vlan filter from the list
724 * @adapter: board private structure
725 * @vlan: VLAN tag
726 **/
727static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
728{
729 struct i40evf_vlan_filter *f;
13acb546
MW		 730 int count = 50;
731
732 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
733 &adapter->crit_section)) {
734 udelay(1);
735 if (--count == 0)
736 return;
737 }
5eae00c5
GR		 738
739 f = i40evf_find_vlan(adapter, vlan);
740 if (f) {
741 f->remove = true;
742 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
743 }
13acb546 744 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
5eae00c5
GR		 745}
746
747/**
748 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
749 * @netdev: network device struct
750 * @vid: VLAN tag
751 **/
752static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
75a64435 753 __always_unused __be16 proto, u16 vid)
5eae00c5
GR		 754{
755 struct i40evf_adapter *adapter = netdev_priv(netdev);
756
8ed995ff
MW		 757 if (!VLAN_ALLOWED(adapter))
758 return -EIO;
5eae00c5
GR		 759 if (i40evf_add_vlan(adapter, vid) == NULL)
760 return -ENOMEM;
761 return 0;
762}
763
764/**
765 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
766 * @netdev: network device struct
767 * @vid: VLAN tag
768 **/
769static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
75a64435 770 __always_unused __be16 proto, u16 vid)
5eae00c5
GR		 771{
772 struct i40evf_adapter *adapter = netdev_priv(netdev);
773
8ed995ff
MW		 774 if (VLAN_ALLOWED(adapter)) {
775 i40evf_del_vlan(adapter, vid);
776 return 0;
777 }
778 return -EIO;
5eae00c5
GR		 779}
780
781/**
782 * i40evf_find_filter - Search filter list for specific mac filter
783 * @adapter: board private structure
784 * @macaddr: the MAC address
785 *
786 * Returns ptr to the filter object or NULL
787 **/
788static struct
789i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
790 u8 *macaddr)
791{
792 struct i40evf_mac_filter *f;
793
794 if (!macaddr)
795 return NULL;
796
797 list_for_each_entry(f, &adapter->mac_filter_list, list) {
798 if (ether_addr_equal(macaddr, f->macaddr))
799 return f;
800 }
801 return NULL;
802}
803
804/**
805 * i40e_add_filter - Add a mac filter to the filter list
806 * @adapter: board private structure
807 * @macaddr: the MAC address
808 *
809 * Returns ptr to the filter object or NULL when no memory available.
810 **/
811static struct
812i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
813 u8 *macaddr)
814{
815 struct i40evf_mac_filter *f;
54e16f64 816 int count = 50;
5eae00c5
GR		 817
818 if (!macaddr)
819 return NULL;
820
821 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
54e16f64 822 &adapter->crit_section)) {
b65476cd 823 udelay(1);
54e16f64
MW		 824 if (--count == 0)
825 return NULL;
826 }
5eae00c5
GR		 827
828 f = i40evf_find_filter(adapter, macaddr);
348d4994 829 if (!f) {
5eae00c5 830 f = kzalloc(sizeof(*f), GFP_ATOMIC);
348d4994 831 if (!f) {
5eae00c5
GR		 832 clear_bit(__I40EVF_IN_CRITICAL_TASK,
833 &adapter->crit_section);
834 return NULL;
835 }
836
9a173901 837 ether_addr_copy(f->macaddr, macaddr);
5eae00c5
GR		 838
839 list_add(&f->list, &adapter->mac_filter_list);
840 f->add = true;
841 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
842 }
843
844 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
845 return f;
846}
847
848/**
849 * i40evf_set_mac - NDO callback to set port mac address
850 * @netdev: network interface device structure
851 * @p: pointer to an address structure
852 *
853 * Returns 0 on success, negative on failure
854 **/
855static int i40evf_set_mac(struct net_device *netdev, void *p)
856{
857 struct i40evf_adapter *adapter = netdev_priv(netdev);
858 struct i40e_hw *hw = &adapter->hw;
859 struct i40evf_mac_filter *f;
860 struct sockaddr *addr = p;
861
862 if (!is_valid_ether_addr(addr->sa_data))
863 return -EADDRNOTAVAIL;
864
865 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
866 return 0;
867
14e52ee2
MW		 868 if (adapter->flags & I40EVF_FLAG_ADDR_SET_BY_PF)
869 return -EPERM;
870
871 f = i40evf_find_filter(adapter, hw->mac.addr);
872 if (f) {
873 f->remove = true;
874 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
875 }
876
5eae00c5
GR		 877 f = i40evf_add_filter(adapter, addr->sa_data);
878 if (f) {
9a173901
GR		 879 ether_addr_copy(hw->mac.addr, addr->sa_data);
880 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
5eae00c5
GR		 881 }
882
883 return (f == NULL) ? -ENOMEM : 0;
884}
885
886/**
887 * i40evf_set_rx_mode - NDO callback to set the netdev filters
888 * @netdev: network interface device structure
889 **/
890static void i40evf_set_rx_mode(struct net_device *netdev)
891{
892 struct i40evf_adapter *adapter = netdev_priv(netdev);
893 struct i40evf_mac_filter *f, *ftmp;
894 struct netdev_hw_addr *uca;
895 struct netdev_hw_addr *mca;
2f41f335 896 struct netdev_hw_addr *ha;
54e16f64 897 int count = 50;
5eae00c5
GR		 898
899 /* add addr if not already in the filter list */
900 netdev_for_each_uc_addr(uca, netdev) {
901 i40evf_add_filter(adapter, uca->addr);
902 }
903 netdev_for_each_mc_addr(mca, netdev) {
904 i40evf_add_filter(adapter, mca->addr);
905 }
906
907 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
54e16f64 908 &adapter->crit_section)) {
b65476cd 909 udelay(1);
54e16f64
MW		 910 if (--count == 0) {
911 dev_err(&adapter->pdev->dev,
912 "Failed to get lock in %s\n", __func__);
913 return;
914 }
915 }
5eae00c5
GR		 916 /* remove filter if not in netdev list */
917 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2f41f335
SN		 918 netdev_for_each_mc_addr(mca, netdev)
919 if (ether_addr_equal(mca->addr, f->macaddr))
920 goto bottom_of_search_loop;
921
922 netdev_for_each_uc_addr(uca, netdev)
923 if (ether_addr_equal(uca->addr, f->macaddr))
924 goto bottom_of_search_loop;
925
926 for_each_dev_addr(netdev, ha)
927 if (ether_addr_equal(ha->addr, f->macaddr))
928 goto bottom_of_search_loop;
929
930 if (ether_addr_equal(f->macaddr, adapter->hw.mac.addr))
931 goto bottom_of_search_loop;
932
933 /* f->macaddr wasn't found in uc, mc, or ha list so delete it */
934 f->remove = true;
935 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
936
937bottom_of_search_loop:
938 continue;
5eae00c5
GR		 939 }
940 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
941}
942
943/**
944 * i40evf_napi_enable_all - enable NAPI on all queue vectors
945 * @adapter: board private structure
946 **/
947static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
948{
949 int q_idx;
950 struct i40e_q_vector *q_vector;
951 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
952
953 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
954 struct napi_struct *napi;
75a64435 955
5eae00c5
GR		 956 q_vector = adapter->q_vector[q_idx];
957 napi = &q_vector->napi;
958 napi_enable(napi);
959 }
960}
961
962/**
963 * i40evf_napi_disable_all - disable NAPI on all queue vectors
964 * @adapter: board private structure
965 **/
966static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
967{
968 int q_idx;
969 struct i40e_q_vector *q_vector;
970 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
971
972 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
973 q_vector = adapter->q_vector[q_idx];
974 napi_disable(&q_vector->napi);
975 }
976}
977
978/**
979 * i40evf_configure - set up transmit and receive data structures
980 * @adapter: board private structure
981 **/
982static void i40evf_configure(struct i40evf_adapter *adapter)
983{
984 struct net_device *netdev = adapter->netdev;
985 int i;
986
987 i40evf_set_rx_mode(netdev);
988
989 i40evf_configure_tx(adapter);
990 i40evf_configure_rx(adapter);
991 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
992
cc052927 993 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5 994 struct i40e_ring *ring = adapter->rx_rings[i];
75a64435 995
a132af24 996 i40evf_alloc_rx_buffers_1buf(ring, ring->count);
5eae00c5
GR		 997 ring->next_to_use = ring->count - 1;
998 writel(ring->next_to_use, ring->tail);
999 }
1000}
1001
1002/**
1003 * i40evf_up_complete - Finish the last steps of bringing up a connection
1004 * @adapter: board private structure
1005 **/
1006static int i40evf_up_complete(struct i40evf_adapter *adapter)
1007{
1008 adapter->state = __I40EVF_RUNNING;
1009 clear_bit(__I40E_DOWN, &adapter->vsi.state);
1010
1011 i40evf_napi_enable_all(adapter);
1012
1013 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
1014 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
1015 return 0;
1016}
1017
5eae00c5
GR		 1018/**
1019 * i40e_down - Shutdown the connection processing
1020 * @adapter: board private structure
1021 **/
1022void i40evf_down(struct i40evf_adapter *adapter)
1023{
1024 struct net_device *netdev = adapter->netdev;
1025 struct i40evf_mac_filter *f;
1026
ddf0b3a6
MW		 1027 if (adapter->state == __I40EVF_DOWN)
1028 return;
1029
53d0b3ae
MW		 1030 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1031 &adapter->crit_section))
1032 usleep_range(500, 1000);
1033
63e18c25
MW		 1034 netif_carrier_off(netdev);
1035 netif_tx_disable(netdev);
748c434b 1036 i40evf_napi_disable_all(adapter);
63e18c25 1037 i40evf_irq_disable(adapter);
53d0b3ae 1038
ef8693eb 1039 /* remove all MAC filters */
5eae00c5
GR		 1040 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1041 f->remove = true;
1042 }
ed1f5b58
MW		 1043 /* remove all VLAN filters */
1044 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1045 f->remove = true;
1046 }
ef8693eb
MW		 1047 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1048 adapter->state != __I40EVF_RESETTING) {
53d0b3ae
MW		 1049 /* cancel any current operation */
1050 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
53d0b3ae
MW		 1051 /* Schedule operations to close down the HW. Don't wait
1052 * here for this to complete. The watchdog is still running
1053 * and it will take care of this.
1054 */
1055 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
ed1f5b58 1056 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
ef8693eb 1057 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
ef8693eb 1058 }
5eae00c5 1059
53d0b3ae 1060 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
5eae00c5
GR		 1061}
1062
1063/**
1064 * i40evf_acquire_msix_vectors - Setup the MSIX capability
1065 * @adapter: board private structure
1066 * @vectors: number of vectors to request
1067 *
1068 * Work with the OS to set up the MSIX vectors needed.
1069 *
1070 * Returns 0 on success, negative on failure
1071 **/
1072static int
1073i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1074{
1075 int err, vector_threshold;
1076
1077 /* We'll want at least 3 (vector_threshold):
1078 * 0) Other (Admin Queue and link, mostly)
1079 * 1) TxQ[0] Cleanup
1080 * 2) RxQ[0] Cleanup
1081 */
1082 vector_threshold = MIN_MSIX_COUNT;
1083
1084 /* The more we get, the more we will assign to Tx/Rx Cleanup
1085 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1086 * Right now, we simply care about how many we'll get; we'll
1087 * set them up later while requesting irq's.
1088 */
fc2f2f5d
AG		 1089 err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1090 vector_threshold, vectors);
1091 if (err < 0) {
80e72893 1092 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
5eae00c5
GR		 1093 kfree(adapter->msix_entries);
1094 adapter->msix_entries = NULL;
fc2f2f5d 1095 return err;
5eae00c5 1096 }
fc2f2f5d
AG		 1097
1098 /* Adjust for only the vectors we'll use, which is minimum
1099 * of max_msix_q_vectors + NONQ_VECS, or the number of
1100 * vectors we were allocated.
1101 */
1102 adapter->num_msix_vectors = err;
1103 return 0;
5eae00c5
GR		 1104}
1105
1106/**
1107 * i40evf_free_queues - Free memory for all rings
1108 * @adapter: board private structure to initialize
1109 *
1110 * Free all of the memory associated with queue pairs.
1111 **/
1112static void i40evf_free_queues(struct i40evf_adapter *adapter)
1113{
1114 int i;
1115
1116 if (!adapter->vsi_res)
1117 return;
cc052927 1118 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5
GR		 1119 if (adapter->tx_rings[i])
1120 kfree_rcu(adapter->tx_rings[i], rcu);
1121 adapter->tx_rings[i] = NULL;
1122 adapter->rx_rings[i] = NULL;
1123 }
1124}
1125
1126/**
1127 * i40evf_alloc_queues - Allocate memory for all rings
1128 * @adapter: board private structure to initialize
1129 *
1130 * We allocate one ring per queue at run-time since we don't know the
1131 * number of queues at compile-time. The polling_netdev array is
1132 * intended for Multiqueue, but should work fine with a single queue.
1133 **/
1134static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1135{
1136 int i;
1137
cc052927 1138 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5
GR		 1139 struct i40e_ring *tx_ring;
1140 struct i40e_ring *rx_ring;
1141
75a64435 1142 tx_ring = kzalloc(sizeof(*tx_ring) * 2, GFP_KERNEL);
5eae00c5
GR		 1143 if (!tx_ring)
1144 goto err_out;
1145
1146 tx_ring->queue_index = i;
1147 tx_ring->netdev = adapter->netdev;
1148 tx_ring->dev = &adapter->pdev->dev;
d732a184 1149 tx_ring->count = adapter->tx_desc_count;
1f012279
ASJ		 1150 if (adapter->flags & I40E_FLAG_WB_ON_ITR_CAPABLE)
1151 tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR;
5eae00c5
GR		 1152 adapter->tx_rings[i] = tx_ring;
1153
1154 rx_ring = &tx_ring[1];
1155 rx_ring->queue_index = i;
1156 rx_ring->netdev = adapter->netdev;
1157 rx_ring->dev = &adapter->pdev->dev;
d732a184 1158 rx_ring->count = adapter->rx_desc_count;
5eae00c5
GR		 1159 adapter->rx_rings[i] = rx_ring;
1160 }
1161
1162 return 0;
1163
1164err_out:
1165 i40evf_free_queues(adapter);
1166 return -ENOMEM;
1167}
1168
1169/**
1170 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1171 * @adapter: board private structure to initialize
1172 *
1173 * Attempt to configure the interrupts using the best available
1174 * capabilities of the hardware and the kernel.
1175 **/
1176static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1177{
1178 int vector, v_budget;
1179 int pairs = 0;
1180 int err = 0;
1181
1182 if (!adapter->vsi_res) {
1183 err = -EIO;
1184 goto out;
1185 }
cc052927 1186 pairs = adapter->num_active_queues;
5eae00c5
GR		 1187
1188 /* It's easy to be greedy for MSI-X vectors, but it really
1189 * doesn't do us much good if we have a lot more vectors
1190 * than CPU's. So let's be conservative and only ask for
1191 * (roughly) twice the number of vectors as there are CPU's.
1192 */
30a500e2
MW		 1193 v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1194 v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
5eae00c5 1195
5eae00c5
GR		 1196 adapter->msix_entries = kcalloc(v_budget,
1197 sizeof(struct msix_entry), GFP_KERNEL);
1198 if (!adapter->msix_entries) {
1199 err = -ENOMEM;
1200 goto out;
1201 }
1202
1203 for (vector = 0; vector < v_budget; vector++)
1204 adapter->msix_entries[vector].entry = vector;
1205
313ed2d5 1206 err = i40evf_acquire_msix_vectors(adapter, v_budget);
5eae00c5
GR		 1207
1208out:
1209 adapter->netdev->real_num_tx_queues = pairs;
1210 return err;
1211}
1212
e25d00b8 1213/**
2c86ac3c 1214 * i40e_config_rss_aq - Prepare for RSS using AQ commands
e25d00b8
ASJ		 1215 * @vsi: vsi structure
1216 * @seed: RSS hash seed
2c86ac3c
HZ		 1217 * @lut: Lookup table
1218 * @lut_size: Lookup table size
1219 *
1220 * Return 0 on success, negative on failure
e25d00b8 1221 **/
2c86ac3c
HZ		 1222static int i40evf_config_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
1223 u8 *lut, u16 lut_size)
e25d00b8 1224{
e25d00b8
ASJ		 1225 struct i40evf_adapter *adapter = vsi->back;
1226 struct i40e_hw *hw = &adapter->hw;
2c86ac3c 1227 int ret = 0;
e25d00b8
ASJ		 1228
1229 if (!vsi->id)
2c86ac3c 1230 return -EINVAL;
e25d00b8
ASJ		 1231
1232 if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
1233 /* bail because we already have a command pending */
1234 dev_err(&adapter->pdev->dev, "Cannot confiure RSS, command %d pending\n",
1235 adapter->current_op);
2c86ac3c 1236 return -EBUSY;
e25d00b8
ASJ		 1237 }
1238
2c86ac3c
HZ		 1239 if (seed) {
1240 struct i40e_aqc_get_set_rss_key_data *rss_key =
1241 (struct i40e_aqc_get_set_rss_key_data *)seed;
1242 ret = i40evf_aq_set_rss_key(hw, vsi->id, rss_key);
1243 if (ret) {
1244 dev_err(&adapter->pdev->dev, "Cannot set RSS key, err %s aq_err %s\n",
1245 i40evf_stat_str(hw, ret),
1246 i40evf_aq_str(hw, hw->aq.asq_last_status));
1247 return ret;
1248 }
1249 }
e25d00b8 1250
2c86ac3c
HZ		 1251 if (lut) {
1252 ret = i40evf_aq_set_rss_lut(hw, vsi->id, false, lut, lut_size);
1253 if (ret) {
1254 dev_err(&adapter->pdev->dev,
1255 "Cannot set RSS lut, err %s aq_err %s\n",
1256 i40evf_stat_str(hw, ret),
1257 i40evf_aq_str(hw, hw->aq.asq_last_status));
1258 return ret;
1259 }
e25d00b8
ASJ		 1260 }
1261
2c86ac3c 1262 return ret;
e25d00b8
ASJ		 1263}
1264
1265/**
2c86ac3c
HZ		 1266 * i40evf_config_rss_reg - Configure RSS keys and lut by writing registers
1267 * @vsi: Pointer to vsi structure
e25d00b8 1268 * @seed: RSS hash seed
2c86ac3c
HZ		 1269 * @lut: Lookup table
1270 * @lut_size: Lookup table size
1271 *
1272 * Returns 0 on success, negative on failure
e25d00b8 1273 **/
2c86ac3c
HZ		 1274static int i40evf_config_rss_reg(struct i40e_vsi *vsi, const u8 *seed,
1275 const u8 *lut, u16 lut_size)
e25d00b8 1276{
2c86ac3c 1277 struct i40evf_adapter *adapter = vsi->back;
e25d00b8 1278 struct i40e_hw *hw = &adapter->hw;
2c86ac3c 1279 u16 i;
e25d00b8 1280
2c86ac3c
HZ		 1281 if (seed) {
1282 u32 *seed_dw = (u32 *)seed;
1283
1284 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1285 wr32(hw, I40E_VFQF_HKEY(i), seed_dw[i]);
1286 }
1287
1288 if (lut) {
1289 u32 *lut_dw = (u32 *)lut;
1290
1291 if (lut_size != I40EVF_HLUT_ARRAY_SIZE)
1292 return -EINVAL;
1293
1294 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++)
1295 wr32(hw, I40E_VFQF_HLUT(i), lut_dw[i]);
e25d00b8
ASJ		 1296 }
1297 i40e_flush(hw);
2c86ac3c
HZ		 1298
1299 return 0;
1300}
1301
90b02b43
HZ		 1302/**
1303 * * i40evf_get_rss_aq - Get RSS keys and lut by using AQ commands
1304 * @vsi: Pointer to vsi structure
1305 * @seed: RSS hash seed
1306 * @lut: Lookup table
1307 * @lut_size: Lookup table size
1308 *
1309 * Return 0 on success, negative on failure
1310 **/
1311static int i40evf_get_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
1312 u8 *lut, u16 lut_size)
1313{
1314 struct i40evf_adapter *adapter = vsi->back;
1315 struct i40e_hw *hw = &adapter->hw;
1316 int ret = 0;
1317
1318 if (seed) {
1319 ret = i40evf_aq_get_rss_key(hw, vsi->id,
1320 (struct i40e_aqc_get_set_rss_key_data *)seed);
1321 if (ret) {
1322 dev_err(&adapter->pdev->dev,
1323 "Cannot get RSS key, err %s aq_err %s\n",
1324 i40evf_stat_str(hw, ret),
1325 i40evf_aq_str(hw, hw->aq.asq_last_status));
1326 return ret;
1327 }
1328 }
1329
1330 if (lut) {
1331 ret = i40evf_aq_get_rss_lut(hw, vsi->id, seed, lut, lut_size);
1332 if (ret) {
1333 dev_err(&adapter->pdev->dev,
1334 "Cannot get RSS lut, err %s aq_err %s\n",
1335 i40evf_stat_str(hw, ret),
1336 i40evf_aq_str(hw, hw->aq.asq_last_status));
1337 return ret;
1338 }
1339 }
1340
1341 return ret;
1342}
1343
1344/**
1345 * * i40evf_get_rss_reg - Get RSS keys and lut by reading registers
1346 * @vsi: Pointer to vsi structure
1347 * @seed: RSS hash seed
1348 * @lut: Lookup table
1349 * @lut_size: Lookup table size
1350 *
1351 * Returns 0 on success, negative on failure
1352 **/
1353static int i40evf_get_rss_reg(struct i40e_vsi *vsi, const u8 *seed,
1354 const u8 *lut, u16 lut_size)
1355{
1356 struct i40evf_adapter *adapter = vsi->back;
1357 struct i40e_hw *hw = &adapter->hw;
1358 u16 i;
1359
1360 if (seed) {
1361 u32 *seed_dw = (u32 *)seed;
1362
1363 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1364 seed_dw[i] = rd32(hw, I40E_VFQF_HKEY(i));
1365 }
1366
1367 if (lut) {
1368 u32 *lut_dw = (u32 *)lut;
1369
1370 if (lut_size != I40EVF_HLUT_ARRAY_SIZE)
1371 return -EINVAL;
1372
1373 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++)
1374 lut_dw[i] = rd32(hw, I40E_VFQF_HLUT(i));
1375 }
1376
1377 return 0;
1378}
1379
2c86ac3c
HZ		 1380/**
1381 * i40evf_config_rss - Configure RSS keys and lut
1382 * @vsi: Pointer to vsi structure
1383 * @seed: RSS hash seed
1384 * @lut: Lookup table
1385 * @lut_size: Lookup table size
1386 *
1387 * Returns 0 on success, negative on failure
1388 **/
1389int i40evf_config_rss(struct i40e_vsi *vsi, const u8 *seed,
1390 u8 *lut, u16 lut_size)
1391{
1392 struct i40evf_adapter *adapter = vsi->back;
1393
1394 if (RSS_AQ(adapter))
1395 return i40evf_config_rss_aq(vsi, seed, lut, lut_size);
1396 else
1397 return i40evf_config_rss_reg(vsi, seed, lut, lut_size);
1398}
1399
90b02b43
HZ		 1400/**
1401 * i40evf_get_rss - Get RSS keys and lut
1402 * @vsi: Pointer to vsi structure
1403 * @seed: RSS hash seed
1404 * @lut: Lookup table
1405 * @lut_size: Lookup table size
1406 *
1407 * Returns 0 on success, negative on failure
1408 **/
1409int i40evf_get_rss(struct i40e_vsi *vsi, const u8 *seed, u8 *lut, u16 lut_size)
1410{
1411 struct i40evf_adapter *adapter = vsi->back;
1412
1413 if (RSS_AQ(adapter))
1414 return i40evf_get_rss_aq(vsi, seed, lut, lut_size);
1415 else
1416 return i40evf_get_rss_reg(vsi, seed, lut, lut_size);
1417}
1418
2c86ac3c
HZ		 1419/**
1420 * i40evf_fill_rss_lut - Fill the lut with default values
1421 * @lut: Lookup table to be filled with
1422 * @rss_table_size: Lookup table size
1423 * @rss_size: Range of queue number for hashing
1424 **/
1425static void i40evf_fill_rss_lut(u8 *lut, u16 rss_table_size, u16 rss_size)
1426{
1427 u16 i;
1428
1429 for (i = 0; i < rss_table_size; i++)
1430 lut[i] = i % rss_size;
e25d00b8
ASJ		 1431}
1432
1433/**
96a81986 1434 * i40evf_init_rss - Prepare for RSS
e25d00b8 1435 * @adapter: board private structure
2c86ac3c
HZ		 1436 *
1437 * Return 0 on success, negative on failure
e25d00b8 1438 **/
2c86ac3c 1439static int i40evf_init_rss(struct i40evf_adapter *adapter)
e25d00b8 1440{
2c86ac3c 1441 struct i40e_vsi *vsi = &adapter->vsi;
e25d00b8
ASJ		 1442 struct i40e_hw *hw = &adapter->hw;
1443 u8 seed[I40EVF_HKEY_ARRAY_SIZE];
1444 u64 hena;
2c86ac3c
HZ		 1445 u8 *lut;
1446 int ret;
e25d00b8
ASJ		 1447
1448 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1449 hena = I40E_DEFAULT_RSS_HENA;
1450 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1451 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1452
2c86ac3c
HZ		 1453 lut = kzalloc(I40EVF_HLUT_ARRAY_SIZE, GFP_KERNEL);
1454 if (!lut)
1455 return -ENOMEM;
66f9af85
HZ		 1456
1457 /* Use user configured lut if there is one, otherwise use default */
1458 if (vsi->rss_lut_user)
1459 memcpy(lut, vsi->rss_lut_user, I40EVF_HLUT_ARRAY_SIZE);
1460 else
1461 i40evf_fill_rss_lut(lut, I40EVF_HLUT_ARRAY_SIZE,
1462 adapter->num_active_queues);
1463
1464 /* Use user configured hash key if there is one, otherwise
1465 * user default.
1466 */
1467 if (vsi->rss_hkey_user)
1468 memcpy(seed, vsi->rss_hkey_user, I40EVF_HKEY_ARRAY_SIZE);
1469 else
1470 netdev_rss_key_fill((void *)seed, I40EVF_HKEY_ARRAY_SIZE);
2c86ac3c
HZ		 1471 ret = i40evf_config_rss(vsi, seed, lut, I40EVF_HLUT_ARRAY_SIZE);
1472 kfree(lut);
1473
1474 return ret;
e25d00b8
ASJ		 1475}
1476
5eae00c5
GR		 1477/**
1478 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1479 * @adapter: board private structure to initialize
1480 *
1481 * We allocate one q_vector per queue interrupt. If allocation fails we
1482 * return -ENOMEM.
1483 **/
1484static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1485{
1486 int q_idx, num_q_vectors;
1487 struct i40e_q_vector *q_vector;
1488
1489 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1490
1491 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
75a64435 1492 q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL);
5eae00c5
GR		 1493 if (!q_vector)
1494 goto err_out;
1495 q_vector->adapter = adapter;
1496 q_vector->vsi = &adapter->vsi;
1497 q_vector->v_idx = q_idx;
1498 netif_napi_add(adapter->netdev, &q_vector->napi,
75a64435 1499 i40evf_napi_poll, NAPI_POLL_WEIGHT);
5eae00c5
GR		 1500 adapter->q_vector[q_idx] = q_vector;
1501 }
1502
1503 return 0;
1504
1505err_out:
1506 while (q_idx) {
1507 q_idx--;
1508 q_vector = adapter->q_vector[q_idx];
1509 netif_napi_del(&q_vector->napi);
1510 kfree(q_vector);
1511 adapter->q_vector[q_idx] = NULL;
1512 }
1513 return -ENOMEM;
1514}
1515
1516/**
1517 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1518 * @adapter: board private structure to initialize
1519 *
1520 * This function frees the memory allocated to the q_vectors. In addition if
1521 * NAPI is enabled it will delete any references to the NAPI struct prior
1522 * to freeing the q_vector.
1523 **/
1524static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1525{
1526 int q_idx, num_q_vectors;
1527 int napi_vectors;
1528
1529 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
cc052927 1530 napi_vectors = adapter->num_active_queues;
5eae00c5
GR		 1531
1532 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1533 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1534
1535 adapter->q_vector[q_idx] = NULL;
1536 if (q_idx < napi_vectors)
1537 netif_napi_del(&q_vector->napi);
1538 kfree(q_vector);
1539 }
1540}
1541
1542/**
1543 * i40evf_reset_interrupt_capability - Reset MSIX setup
1544 * @adapter: board private structure
1545 *
1546 **/
1547void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1548{
1549 pci_disable_msix(adapter->pdev);
1550 kfree(adapter->msix_entries);
1551 adapter->msix_entries = NULL;
5eae00c5
GR		 1552}
1553
1554/**
1555 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1556 * @adapter: board private structure to initialize
1557 *
1558 **/
1559int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1560{
1561 int err;
1562
1563 err = i40evf_set_interrupt_capability(adapter);
1564 if (err) {
1565 dev_err(&adapter->pdev->dev,
1566 "Unable to setup interrupt capabilities\n");
1567 goto err_set_interrupt;
1568 }
1569
1570 err = i40evf_alloc_q_vectors(adapter);
1571 if (err) {
1572 dev_err(&adapter->pdev->dev,
1573 "Unable to allocate memory for queue vectors\n");
1574 goto err_alloc_q_vectors;
1575 }
1576
1577 err = i40evf_alloc_queues(adapter);
1578 if (err) {
1579 dev_err(&adapter->pdev->dev,
1580 "Unable to allocate memory for queues\n");
1581 goto err_alloc_queues;
1582 }
1583
1584 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
75a64435
MW		 1585 (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1586 adapter->num_active_queues);
5eae00c5
GR		 1587
1588 return 0;
1589err_alloc_queues:
1590 i40evf_free_q_vectors(adapter);
1591err_alloc_q_vectors:
1592 i40evf_reset_interrupt_capability(adapter);
1593err_set_interrupt:
1594 return err;
1595}
1596
66f9af85
HZ		 1597/**
1598 * i40evf_clear_rss_config_user - Clear user configurations of RSS
1599 * @vsi: Pointer to VSI structure
1600 **/
1601static void i40evf_clear_rss_config_user(struct i40e_vsi *vsi)
1602{
1603 if (!vsi)
1604 return;
1605
1606 kfree(vsi->rss_hkey_user);
1607 vsi->rss_hkey_user = NULL;
1608
1609 kfree(vsi->rss_lut_user);
1610 vsi->rss_lut_user = NULL;
1611}
1612
5eae00c5
GR		 1613/**
1614 * i40evf_watchdog_timer - Periodic call-back timer
1615 * @data: pointer to adapter disguised as unsigned long
1616 **/
1617static void i40evf_watchdog_timer(unsigned long data)
1618{
1619 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
75a64435 1620
5eae00c5
GR		 1621 schedule_work(&adapter->watchdog_task);
1622 /* timer will be rescheduled in watchdog task */
1623}
1624
1625/**
1626 * i40evf_watchdog_task - Periodic call-back task
1627 * @work: pointer to work_struct
1628 **/
1629static void i40evf_watchdog_task(struct work_struct *work)
1630{
1631 struct i40evf_adapter *adapter = container_of(work,
75a64435
MW		 1632 struct i40evf_adapter,
1633 watchdog_task);
5eae00c5 1634 struct i40e_hw *hw = &adapter->hw;
ee5c1e92 1635 u32 reg_val;
5eae00c5 1636
ef8693eb
MW		 1637 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1638 goto restart_watchdog;
1639
1640 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
ee5c1e92
MW		 1641 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1642 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1643 if ((reg_val == I40E_VFR_VFACTIVE) ||
1644 (reg_val == I40E_VFR_COMPLETED)) {
ef8693eb
MW		 1645 /* A chance for redemption! */
1646 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1647 adapter->state = __I40EVF_STARTUP;
1648 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1649 schedule_delayed_work(&adapter->init_task, 10);
1650 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1651 &adapter->crit_section);
1652 /* Don't reschedule the watchdog, since we've restarted
1653 * the init task. When init_task contacts the PF and
1654 * gets everything set up again, it'll restart the
1655 * watchdog for us. Down, boy. Sit. Stay. Woof.
1656 */
1657 return;
1658 }
ef8693eb
MW		 1659 adapter->aq_required = 0;
1660 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5 1661 goto watchdog_done;
ef8693eb 1662 }
5eae00c5 1663
ef8693eb
MW		 1664 if ((adapter->state < __I40EVF_DOWN) ||
1665 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
5eae00c5
GR		 1666 goto watchdog_done;
1667
ef8693eb 1668 /* check for reset */
ee5c1e92
MW		 1669 reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
1670 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
5eae00c5 1671 adapter->state = __I40EVF_RESETTING;
ef8693eb 1672 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
249c8b8d 1673 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
5eae00c5 1674 schedule_work(&adapter->reset_task);
ef8693eb
MW		 1675 adapter->aq_required = 0;
1676 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 1677 goto watchdog_done;
1678 }
1679
1680 /* Process admin queue tasks. After init, everything gets done
1681 * here so we don't race on the admin queue.
1682 */
ed636960 1683 if (adapter->current_op) {
0758e7cb
MW		 1684 if (!i40evf_asq_done(hw)) {
1685 dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1686 i40evf_send_api_ver(adapter);
1687 }
5eae00c5 1688 goto watchdog_done;
0758e7cb 1689 }
e6d038de
MW		 1690 if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
1691 i40evf_send_vf_config_msg(adapter);
1692 goto watchdog_done;
1693 }
5eae00c5 1694
e284fc88
MW		 1695 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1696 i40evf_disable_queues(adapter);
1697 goto watchdog_done;
1698 }
1699
5eae00c5
GR		 1700 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1701 i40evf_map_queues(adapter);
1702 goto watchdog_done;
1703 }
1704
1705 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1706 i40evf_add_ether_addrs(adapter);
1707 goto watchdog_done;
1708 }
1709
1710 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1711 i40evf_add_vlans(adapter);
1712 goto watchdog_done;
1713 }
1714
1715 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1716 i40evf_del_ether_addrs(adapter);
1717 goto watchdog_done;
1718 }
1719
1720 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1721 i40evf_del_vlans(adapter);
1722 goto watchdog_done;
1723 }
1724
5eae00c5
GR		 1725 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1726 i40evf_configure_queues(adapter);
1727 goto watchdog_done;
1728 }
1729
1730 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1731 i40evf_enable_queues(adapter);
1732 goto watchdog_done;
1733 }
1734
e25d00b8
ASJ		 1735 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
1736 /* This message goes straight to the firmware, not the
1737 * PF, so we don't have to set current_op as we will
1738 * not get a response through the ARQ.
1739 */
96a81986 1740 i40evf_init_rss(adapter);
e25d00b8
ASJ		 1741 adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
1742 goto watchdog_done;
1743 }
1744
5eae00c5
GR		 1745 if (adapter->state == __I40EVF_RUNNING)
1746 i40evf_request_stats(adapter);
5eae00c5 1747watchdog_done:
4870e176
MW		 1748 if (adapter->state == __I40EVF_RUNNING) {
1749 i40evf_irq_enable_queues(adapter, ~0);
1750 i40evf_fire_sw_int(adapter, 0xFF);
1751 } else {
1752 i40evf_fire_sw_int(adapter, 0x1);
1753 }
1754
ef8693eb
MW		 1755 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1756restart_watchdog:
d3e2edb7
AS		 1757 if (adapter->state == __I40EVF_REMOVE)
1758 return;
5eae00c5
GR		 1759 if (adapter->aq_required)
1760 mod_timer(&adapter->watchdog_timer,
1761 jiffies + msecs_to_jiffies(20));
1762 else
1763 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
5eae00c5
GR		 1764 schedule_work(&adapter->adminq_task);
1765}
1766
67c818a1
MW		 1767#define I40EVF_RESET_WAIT_MS 10
1768#define I40EVF_RESET_WAIT_COUNT 500
5eae00c5
GR		 1769/**
1770 * i40evf_reset_task - Call-back task to handle hardware reset
1771 * @work: pointer to work_struct
1772 *
1773 * During reset we need to shut down and reinitialize the admin queue
1774 * before we can use it to communicate with the PF again. We also clear
1775 * and reinit the rings because that context is lost as well.
1776 **/
1777static void i40evf_reset_task(struct work_struct *work)
1778{
ef8693eb
MW		 1779 struct i40evf_adapter *adapter = container_of(work,
1780 struct i40evf_adapter,
1781 reset_task);
ac833bbf 1782 struct net_device *netdev = adapter->netdev;
5eae00c5 1783 struct i40e_hw *hw = &adapter->hw;
40d01366 1784 struct i40evf_vlan_filter *vlf;
ac833bbf 1785 struct i40evf_mac_filter *f;
ee5c1e92 1786 u32 reg_val;
ac833bbf 1787 int i = 0, err;
5eae00c5
GR		 1788
1789 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1790 &adapter->crit_section))
f98a2006 1791 usleep_range(500, 1000);
3526d800 1792
67c818a1 1793 i40evf_misc_irq_disable(adapter);
3526d800 1794 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
67c818a1
MW		 1795 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1796 /* Restart the AQ here. If we have been reset but didn't
1797 * detect it, or if the PF had to reinit, our AQ will be hosed.
1798 */
1799 i40evf_shutdown_adminq(hw);
1800 i40evf_init_adminq(hw);
3526d800
MW		 1801 i40evf_request_reset(adapter);
1802 }
67c818a1 1803 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
3526d800 1804
ef8693eb
MW		 1805 /* poll until we see the reset actually happen */
1806 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
ee5c1e92
MW		 1807 reg_val = rd32(hw, I40E_VF_ARQLEN1) &
1808 I40E_VF_ARQLEN1_ARQENABLE_MASK;
1809 if (!reg_val)
ef8693eb 1810 break;
ee5c1e92 1811 usleep_range(5000, 10000);
ef8693eb
MW		 1812 }
1813 if (i == I40EVF_RESET_WAIT_COUNT) {
67c818a1 1814 dev_info(&adapter->pdev->dev, "Never saw reset\n");
ef8693eb
MW		 1815 goto continue_reset; /* act like the reset happened */
1816 }
5eae00c5 1817
ef8693eb
MW		 1818 /* wait until the reset is complete and the PF is responding to us */
1819 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
ee5c1e92
MW		 1820 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1821 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1822 if (reg_val == I40E_VFR_VFACTIVE)
5eae00c5 1823 break;
c88e38cc 1824 msleep(I40EVF_RESET_WAIT_MS);
5eae00c5 1825 }
67c818a1
MW		 1826 /* extra wait to make sure minimum wait is met */
1827 msleep(I40EVF_RESET_WAIT_MS);
ef8693eb 1828 if (i == I40EVF_RESET_WAIT_COUNT) {
874d1a10 1829 struct i40evf_mac_filter *ftmp;
6ba36a24
MW		 1830 struct i40evf_vlan_filter *fv, *fvtmp;
1831
5eae00c5 1832 /* reset never finished */
80e72893 1833 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
ee5c1e92 1834 reg_val);
ef8693eb
MW		 1835 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1836
169f4076
MW		 1837 if (netif_running(adapter->netdev)) {
1838 set_bit(__I40E_DOWN, &adapter->vsi.state);
ac833bbf 1839 netif_carrier_off(netdev);
67c818a1
MW		 1840 netif_tx_disable(netdev);
1841 i40evf_napi_disable_all(adapter);
1842 i40evf_irq_disable(adapter);
169f4076
MW		 1843 i40evf_free_traffic_irqs(adapter);
1844 i40evf_free_all_tx_resources(adapter);
1845 i40evf_free_all_rx_resources(adapter);
1846 }
6ba36a24
MW		 1847
1848 /* Delete all of the filters, both MAC and VLAN. */
1849 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1850 list) {
1851 list_del(&f->list);
1852 kfree(f);
1853 }
67c818a1 1854
6ba36a24
MW		 1855 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1856 list) {
1857 list_del(&fv->list);
1858 kfree(fv);
1859 }
1860
ef8693eb
MW		 1861 i40evf_free_misc_irq(adapter);
1862 i40evf_reset_interrupt_capability(adapter);
1863 i40evf_free_queues(adapter);
d31944d6 1864 i40evf_free_q_vectors(adapter);
ef8693eb
MW		 1865 kfree(adapter->vf_res);
1866 i40evf_shutdown_adminq(hw);
1867 adapter->netdev->flags &= ~IFF_UP;
1868 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
67c818a1
MW		 1869 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1870 dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
ef8693eb 1871 return; /* Do not attempt to reinit. It's dead, Jim. */
5eae00c5 1872 }
ef8693eb
MW		 1873
1874continue_reset:
3c8e0b98 1875 if (netif_running(adapter->netdev)) {
3c8e0b98 1876 netif_carrier_off(netdev);
67c818a1
MW		 1877 netif_tx_stop_all_queues(netdev);
1878 i40evf_napi_disable_all(adapter);
3c8e0b98 1879 }
67c818a1 1880 i40evf_irq_disable(adapter);
ac833bbf 1881
5eae00c5 1882 adapter->state = __I40EVF_RESETTING;
67c818a1
MW		 1883 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1884
1885 /* free the Tx/Rx rings and descriptors, might be better to just
1886 * re-use them sometime in the future
1887 */
1888 i40evf_free_all_rx_resources(adapter);
1889 i40evf_free_all_tx_resources(adapter);
5eae00c5
GR		 1890
1891 /* kill and reinit the admin queue */
1892 if (i40evf_shutdown_adminq(hw))
ac833bbf
MW		 1893 dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
1894 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 1895 err = i40evf_init_adminq(hw);
1896 if (err)
ac833bbf
MW		 1897 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1898 err);
5eae00c5 1899
e6d038de
MW		 1900 adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG;
1901 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
ac833bbf
MW		 1902
1903 /* re-add all MAC filters */
1904 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1905 f->add = true;
1906 }
1907 /* re-add all VLAN filters */
40d01366
MW		 1908 list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
1909 vlf->add = true;
ac833bbf 1910 }
e6d038de 1911 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
ac833bbf 1912 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
5eae00c5 1913 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
67c818a1 1914 i40evf_misc_irq_enable(adapter);
5eae00c5
GR		 1915
1916 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1917
1918 if (netif_running(adapter->netdev)) {
1919 /* allocate transmit descriptors */
1920 err = i40evf_setup_all_tx_resources(adapter);
1921 if (err)
1922 goto reset_err;
1923
1924 /* allocate receive descriptors */
1925 err = i40evf_setup_all_rx_resources(adapter);
1926 if (err)
1927 goto reset_err;
1928
1929 i40evf_configure(adapter);
1930
1931 err = i40evf_up_complete(adapter);
1932 if (err)
1933 goto reset_err;
1934
1935 i40evf_irq_enable(adapter, true);
67c818a1
MW		 1936 } else {
1937 adapter->state = __I40EVF_DOWN;
5eae00c5 1938 }
67c818a1 1939
5eae00c5
GR		 1940 return;
1941reset_err:
80e72893 1942 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
5eae00c5
GR		 1943 i40evf_close(adapter->netdev);
1944}
1945
1946/**
1947 * i40evf_adminq_task - worker thread to clean the admin queue
1948 * @work: pointer to work_struct containing our data
1949 **/
1950static void i40evf_adminq_task(struct work_struct *work)
1951{
1952 struct i40evf_adapter *adapter =
1953 container_of(work, struct i40evf_adapter, adminq_task);
1954 struct i40e_hw *hw = &adapter->hw;
1955 struct i40e_arq_event_info event;
1956 struct i40e_virtchnl_msg *v_msg;
1957 i40e_status ret;
912257e5 1958 u32 val, oldval;
5eae00c5
GR		 1959 u16 pending;
1960
ef8693eb 1961 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
7235448c 1962 goto out;
ef8693eb 1963
1001dc37
MW		 1964 event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1965 event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
249c8b8d 1966 if (!event.msg_buf)
7235448c 1967 goto out;
249c8b8d 1968
5eae00c5
GR		 1969 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1970 do {
1971 ret = i40evf_clean_arq_element(hw, &event, &pending);
8b011ebb 1972 if (ret || !v_msg->v_opcode)
5eae00c5
GR		 1973 break; /* No event to process or error cleaning ARQ */
1974
1975 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1976 v_msg->v_retval, event.msg_buf,
1001dc37 1977 event.msg_len);
75a64435 1978 if (pending != 0)
5eae00c5 1979 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
5eae00c5
GR		 1980 } while (pending);
1981
67c818a1
MW		 1982 if ((adapter->flags &
1983 (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
1984 adapter->state == __I40EVF_RESETTING)
1985 goto freedom;
1986
912257e5
MW		 1987 /* check for error indications */
1988 val = rd32(hw, hw->aq.arq.len);
1989 oldval = val;
b1f3366b 1990 if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
912257e5 1991 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
b1f3366b 1992 val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
912257e5 1993 }
b1f3366b 1994 if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
912257e5 1995 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
b1f3366b 1996 val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
912257e5 1997 }
b1f3366b 1998 if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
912257e5 1999 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
b1f3366b 2000 val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
912257e5
MW		 2001 }
2002 if (oldval != val)
2003 wr32(hw, hw->aq.arq.len, val);
2004
2005 val = rd32(hw, hw->aq.asq.len);
2006 oldval = val;
b1f3366b 2007 if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
912257e5 2008 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
b1f3366b 2009 val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
912257e5 2010 }
b1f3366b 2011 if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
912257e5 2012 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
b1f3366b 2013 val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
912257e5 2014 }
b1f3366b 2015 if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
912257e5 2016 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
b1f3366b 2017 val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
912257e5
MW		 2018 }
2019 if (oldval != val)
2020 wr32(hw, hw->aq.asq.len, val);
2021
67c818a1 2022freedom:
7235448c
MW		 2023 kfree(event.msg_buf);
2024out:
5eae00c5
GR		 2025 /* re-enable Admin queue interrupt cause */
2026 i40evf_misc_irq_enable(adapter);
5eae00c5
GR		 2027}
2028
2029/**
2030 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
2031 * @adapter: board private structure
2032 *
2033 * Free all transmit software resources
2034 **/
e284fc88 2035void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
5eae00c5
GR		 2036{
2037 int i;
2038
cc052927 2039 for (i = 0; i < adapter->num_active_queues; i++)
5eae00c5
GR		 2040 if (adapter->tx_rings[i]->desc)
2041 i40evf_free_tx_resources(adapter->tx_rings[i]);
5eae00c5
GR		 2042}
2043
2044/**
2045 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
2046 * @adapter: board private structure
2047 *
2048 * If this function returns with an error, then it's possible one or
2049 * more of the rings is populated (while the rest are not). It is the
2050 * callers duty to clean those orphaned rings.
2051 *
2052 * Return 0 on success, negative on failure
2053 **/
2054static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
2055{
2056 int i, err = 0;
2057
cc052927 2058 for (i = 0; i < adapter->num_active_queues; i++) {
d732a184 2059 adapter->tx_rings[i]->count = adapter->tx_desc_count;
5eae00c5
GR		 2060 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
2061 if (!err)
2062 continue;
2063 dev_err(&adapter->pdev->dev,
fb43201f 2064 "Allocation for Tx Queue %u failed\n", i);
5eae00c5
GR		 2065 break;
2066 }
2067
2068 return err;
2069}
2070
2071/**
2072 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
2073 * @adapter: board private structure
2074 *
2075 * If this function returns with an error, then it's possible one or
2076 * more of the rings is populated (while the rest are not). It is the
2077 * callers duty to clean those orphaned rings.
2078 *
2079 * Return 0 on success, negative on failure
2080 **/
2081static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
2082{
2083 int i, err = 0;
2084
cc052927 2085 for (i = 0; i < adapter->num_active_queues; i++) {
d732a184 2086 adapter->rx_rings[i]->count = adapter->rx_desc_count;
5eae00c5
GR		 2087 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
2088 if (!err)
2089 continue;
2090 dev_err(&adapter->pdev->dev,
fb43201f 2091 "Allocation for Rx Queue %u failed\n", i);
5eae00c5
GR		 2092 break;
2093 }
2094 return err;
2095}
2096
2097/**
2098 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
2099 * @adapter: board private structure
2100 *
2101 * Free all receive software resources
2102 **/
e284fc88 2103void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
5eae00c5
GR		 2104{
2105 int i;
2106
cc052927 2107 for (i = 0; i < adapter->num_active_queues; i++)
5eae00c5
GR		 2108 if (adapter->rx_rings[i]->desc)
2109 i40evf_free_rx_resources(adapter->rx_rings[i]);
2110}
2111
2112/**
2113 * i40evf_open - Called when a network interface is made active
2114 * @netdev: network interface device structure
2115 *
2116 * Returns 0 on success, negative value on failure
2117 *
2118 * The open entry point is called when a network interface is made
2119 * active by the system (IFF_UP). At this point all resources needed
2120 * for transmit and receive operations are allocated, the interrupt
2121 * handler is registered with the OS, the watchdog timer is started,
2122 * and the stack is notified that the interface is ready.
2123 **/
2124static int i40evf_open(struct net_device *netdev)
2125{
2126 struct i40evf_adapter *adapter = netdev_priv(netdev);
2127 int err;
2128
ef8693eb
MW		 2129 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
2130 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
2131 return -EIO;
2132 }
e284fc88 2133 if (adapter->state != __I40EVF_DOWN || adapter->aq_required)
5eae00c5
GR		 2134 return -EBUSY;
2135
2136 /* allocate transmit descriptors */
2137 err = i40evf_setup_all_tx_resources(adapter);
2138 if (err)
2139 goto err_setup_tx;
2140
2141 /* allocate receive descriptors */
2142 err = i40evf_setup_all_rx_resources(adapter);
2143 if (err)
2144 goto err_setup_rx;
2145
2146 /* clear any pending interrupts, may auto mask */
2147 err = i40evf_request_traffic_irqs(adapter, netdev->name);
2148 if (err)
2149 goto err_req_irq;
2150
44151cd3 2151 i40evf_add_filter(adapter, adapter->hw.mac.addr);
5eae00c5
GR		 2152 i40evf_configure(adapter);
2153
2154 err = i40evf_up_complete(adapter);
2155 if (err)
2156 goto err_req_irq;
2157
2158 i40evf_irq_enable(adapter, true);
2159
2160 return 0;
2161
2162err_req_irq:
2163 i40evf_down(adapter);
2164 i40evf_free_traffic_irqs(adapter);
2165err_setup_rx:
2166 i40evf_free_all_rx_resources(adapter);
2167err_setup_tx:
2168 i40evf_free_all_tx_resources(adapter);
2169
2170 return err;
2171}
2172
2173/**
2174 * i40evf_close - Disables a network interface
2175 * @netdev: network interface device structure
2176 *
2177 * Returns 0, this is not allowed to fail
2178 *
2179 * The close entry point is called when an interface is de-activated
2180 * by the OS. The hardware is still under the drivers control, but
2181 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
2182 * are freed, along with all transmit and receive resources.
2183 **/
2184static int i40evf_close(struct net_device *netdev)
2185{
2186 struct i40evf_adapter *adapter = netdev_priv(netdev);
2187
ef8693eb
MW		 2188 if (adapter->state <= __I40EVF_DOWN)
2189 return 0;
2190
ef8693eb 2191
5eae00c5
GR		 2192 set_bit(__I40E_DOWN, &adapter->vsi.state);
2193
2194 i40evf_down(adapter);
ddf0b3a6 2195 adapter->state = __I40EVF_DOWN;
5eae00c5
GR		 2196 i40evf_free_traffic_irqs(adapter);
2197
5eae00c5
GR		 2198 return 0;
2199}
2200
2201/**
2202 * i40evf_get_stats - Get System Network Statistics
2203 * @netdev: network interface device structure
2204 *
2205 * Returns the address of the device statistics structure.
2206 * The statistics are actually updated from the timer callback.
2207 **/
2208static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
2209{
2210 struct i40evf_adapter *adapter = netdev_priv(netdev);
2211
2212 /* only return the current stats */
2213 return &adapter->net_stats;
2214}
2215
5eae00c5
GR		 2216/**
2217 * i40evf_change_mtu - Change the Maximum Transfer Unit
2218 * @netdev: network interface device structure
2219 * @new_mtu: new value for maximum frame size
2220 *
2221 * Returns 0 on success, negative on failure
2222 **/
2223static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
2224{
2225 struct i40evf_adapter *adapter = netdev_priv(netdev);
2226 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2227
2228 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
2229 return -EINVAL;
2230
5eae00c5 2231 netdev->mtu = new_mtu;
67c818a1
MW		 2232 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
2233 schedule_work(&adapter->reset_task);
2234
5eae00c5
GR		 2235 return 0;
2236}
2237
2238static const struct net_device_ops i40evf_netdev_ops = {
2239 .ndo_open = i40evf_open,
2240 .ndo_stop = i40evf_close,
2241 .ndo_start_xmit = i40evf_xmit_frame,
2242 .ndo_get_stats = i40evf_get_stats,
2243 .ndo_set_rx_mode = i40evf_set_rx_mode,
2244 .ndo_validate_addr = eth_validate_addr,
2245 .ndo_set_mac_address = i40evf_set_mac,
2246 .ndo_change_mtu = i40evf_change_mtu,
2247 .ndo_tx_timeout = i40evf_tx_timeout,
2248 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
2249 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
7709b4c1
AD		 2250#ifdef CONFIG_NET_POLL_CONTROLLER
2251 .ndo_poll_controller = i40evf_netpoll,
2252#endif
5eae00c5
GR		 2253};
2254
2255/**
2256 * i40evf_check_reset_complete - check that VF reset is complete
2257 * @hw: pointer to hw struct
2258 *
2259 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
2260 **/
2261static int i40evf_check_reset_complete(struct i40e_hw *hw)
2262{
2263 u32 rstat;
2264 int i;
2265
2266 for (i = 0; i < 100; i++) {
fd35886a
AS		 2267 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
2268 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
2269 if ((rstat == I40E_VFR_VFACTIVE) ||
2270 (rstat == I40E_VFR_COMPLETED))
5eae00c5 2271 return 0;
f98a2006 2272 usleep_range(10, 20);
5eae00c5
GR		 2273 }
2274 return -EBUSY;
2275}
2276
e6d038de
MW		 2277/**
2278 * i40evf_process_config - Process the config information we got from the PF
2279 * @adapter: board private structure
2280 *
2281 * Verify that we have a valid config struct, and set up our netdev features
2282 * and our VSI struct.
2283 **/
2284int i40evf_process_config(struct i40evf_adapter *adapter)
2285{
2286 struct net_device *netdev = adapter->netdev;
2287 int i;
2288
2289 /* got VF config message back from PF, now we can parse it */
2290 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2291 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2292 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2293 }
2294 if (!adapter->vsi_res) {
2295 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
2296 return -ENODEV;
2297 }
2298
2299 if (adapter->vf_res->vf_offload_flags
2300 & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
cc7e406c
MW		 2301 netdev->vlan_features = netdev->features &
2302 ~(NETIF_F_HW_VLAN_CTAG_TX |
2303 NETIF_F_HW_VLAN_CTAG_RX |
2304 NETIF_F_HW_VLAN_CTAG_FILTER);
e6d038de
MW		 2305 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2306 NETIF_F_HW_VLAN_CTAG_RX |
2307 NETIF_F_HW_VLAN_CTAG_FILTER;
2308 }
2309 netdev->features |= NETIF_F_HIGHDMA |
2310 NETIF_F_SG |
2311 NETIF_F_IP_CSUM |
2312 NETIF_F_SCTP_CSUM |
2313 NETIF_F_IPV6_CSUM |
2314 NETIF_F_TSO |
2315 NETIF_F_TSO6 |
2316 NETIF_F_RXCSUM |
2317 NETIF_F_GRO;
2318
2319 /* copy netdev features into list of user selectable features */
2320 netdev->hw_features |= netdev->features;
2321 netdev->hw_features &= ~NETIF_F_RXCSUM;
2322
2323 adapter->vsi.id = adapter->vsi_res->vsi_id;
2324
2325 adapter->vsi.back = adapter;
2326 adapter->vsi.base_vector = 1;
2327 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2328 adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2329 ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2330 adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2331 ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2332 adapter->vsi.netdev = adapter->netdev;
f578f5f4 2333 adapter->vsi.qs_handle = adapter->vsi_res->qset_handle;
e6d038de
MW		 2334 return 0;
2335}
2336
5eae00c5
GR		 2337/**
2338 * i40evf_init_task - worker thread to perform delayed initialization
2339 * @work: pointer to work_struct containing our data
2340 *
2341 * This task completes the work that was begun in probe. Due to the nature
2342 * of VF-PF communications, we may need to wait tens of milliseconds to get
dbedd44e 2343 * responses back from the PF. Rather than busy-wait in probe and bog down the
5eae00c5
GR		 2344 * whole system, we'll do it in a task so we can sleep.
2345 * This task only runs during driver init. Once we've established
2346 * communications with the PF driver and set up our netdev, the watchdog
2347 * takes over.
2348 **/
2349static void i40evf_init_task(struct work_struct *work)
2350{
2351 struct i40evf_adapter *adapter = container_of(work,
2352 struct i40evf_adapter,
2353 init_task.work);
2354 struct net_device *netdev = adapter->netdev;
5eae00c5
GR		 2355 struct i40e_hw *hw = &adapter->hw;
2356 struct pci_dev *pdev = adapter->pdev;
e6d038de 2357 int err, bufsz;
5eae00c5
GR		 2358
2359 switch (adapter->state) {
2360 case __I40EVF_STARTUP:
2361 /* driver loaded, probe complete */
ef8693eb
MW		 2362 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2363 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
5eae00c5
GR		 2364 err = i40e_set_mac_type(hw);
2365 if (err) {
c2a137cb
MW		 2366 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2367 err);
2619ef47 2368 goto err;
5eae00c5
GR		 2369 }
2370 err = i40evf_check_reset_complete(hw);
2371 if (err) {
0d9c7ea8 2372 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
75a64435 2373 err);
5eae00c5
GR		 2374 goto err;
2375 }
2376 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2377 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2378 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2379 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2380
2381 err = i40evf_init_adminq(hw);
2382 if (err) {
c2a137cb
MW		 2383 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2384 err);
5eae00c5
GR		 2385 goto err;
2386 }
2387 err = i40evf_send_api_ver(adapter);
2388 if (err) {
10bdd67b 2389 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
5eae00c5
GR		 2390 i40evf_shutdown_adminq(hw);
2391 goto err;
2392 }
2393 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2394 goto restart;
5eae00c5 2395 case __I40EVF_INIT_VERSION_CHECK:
10bdd67b 2396 if (!i40evf_asq_done(hw)) {
80e72893 2397 dev_err(&pdev->dev, "Admin queue command never completed\n");
906a6937
MW		 2398 i40evf_shutdown_adminq(hw);
2399 adapter->state = __I40EVF_STARTUP;
5eae00c5 2400 goto err;
10bdd67b 2401 }
5eae00c5
GR		 2402
2403 /* aq msg sent, awaiting reply */
2404 err = i40evf_verify_api_ver(adapter);
2405 if (err) {
d4f82fd3 2406 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
56f9920a 2407 err = i40evf_send_api_ver(adapter);
ee1693e5
MW		 2408 else
2409 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
2410 adapter->pf_version.major,
2411 adapter->pf_version.minor,
2412 I40E_VIRTCHNL_VERSION_MAJOR,
2413 I40E_VIRTCHNL_VERSION_MINOR);
5eae00c5
GR		 2414 goto err;
2415 }
2416 err = i40evf_send_vf_config_msg(adapter);
2417 if (err) {
3f2ab172 2418 dev_err(&pdev->dev, "Unable to send config request (%d)\n",
5eae00c5
GR		 2419 err);
2420 goto err;
2421 }
2422 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2423 goto restart;
5eae00c5
GR		 2424 case __I40EVF_INIT_GET_RESOURCES:
2425 /* aq msg sent, awaiting reply */
2426 if (!adapter->vf_res) {
2427 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2428 (I40E_MAX_VF_VSI *
2429 sizeof(struct i40e_virtchnl_vsi_resource));
2430 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
c2a137cb 2431 if (!adapter->vf_res)
5eae00c5 2432 goto err;
5eae00c5
GR		 2433 }
2434 err = i40evf_get_vf_config(adapter);
906a6937 2435 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
906a6937
MW		 2436 err = i40evf_send_vf_config_msg(adapter);
2437 goto err;
2438 }
5eae00c5 2439 if (err) {
c2a137cb
MW		 2440 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2441 err);
5eae00c5
GR		 2442 goto err_alloc;
2443 }
2444 adapter->state = __I40EVF_INIT_SW;
2445 break;
2446 default:
2447 goto err_alloc;
2448 }
e6d038de 2449 if (i40evf_process_config(adapter))
5eae00c5 2450 goto err_alloc;
e6d038de 2451 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 2452
2453 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2454
5eae00c5
GR		 2455 netdev->netdev_ops = &i40evf_netdev_ops;
2456 i40evf_set_ethtool_ops(netdev);
2457 netdev->watchdog_timeo = 5 * HZ;
3415e8ce 2458
5eae00c5 2459 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
b34f90e7 2460 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
c2a137cb 2461 adapter->hw.mac.addr);
14e52ee2
MW		 2462 eth_hw_addr_random(netdev);
2463 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
2464 } else {
2465 adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF;
2466 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2467 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
5eae00c5 2468 }
5eae00c5 2469
5eae00c5
GR		 2470 init_timer(&adapter->watchdog_timer);
2471 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2472 adapter->watchdog_timer.data = (unsigned long)adapter;
2473 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2474
cc052927
MW		 2475 adapter->num_active_queues = min_t(int,
2476 adapter->vsi_res->num_queue_pairs,
2477 (int)(num_online_cpus()));
d732a184
MW		 2478 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2479 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
5eae00c5
GR		 2480 err = i40evf_init_interrupt_scheme(adapter);
2481 if (err)
2482 goto err_sw_init;
2483 i40evf_map_rings_to_vectors(adapter);
1f012279
ASJ		 2484 if (adapter->vf_res->vf_offload_flags &
2485 I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
2486 adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
e25d00b8 2487 if (!RSS_AQ(adapter))
96a81986 2488 i40evf_init_rss(adapter);
5eae00c5
GR		 2489 err = i40evf_request_misc_irq(adapter);
2490 if (err)
2491 goto err_sw_init;
2492
2493 netif_carrier_off(netdev);
2494
ef8693eb
MW		 2495 if (!adapter->netdev_registered) {
2496 err = register_netdev(netdev);
2497 if (err)
2498 goto err_register;
2499 }
5eae00c5
GR		 2500
2501 adapter->netdev_registered = true;
2502
2503 netif_tx_stop_all_queues(netdev);
2504
b34f90e7 2505 dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
5eae00c5
GR		 2506 if (netdev->features & NETIF_F_GRO)
2507 dev_info(&pdev->dev, "GRO is enabled\n");
2508
2509 dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2510 adapter->state = __I40EVF_DOWN;
2511 set_bit(__I40E_DOWN, &adapter->vsi.state);
2512 i40evf_misc_irq_enable(adapter);
e25d00b8
ASJ		 2513
2514 if (RSS_AQ(adapter)) {
2515 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
2516 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
2517 } else {
96a81986 2518 i40evf_init_rss(adapter);
e25d00b8 2519 }
5eae00c5
GR		 2520 return;
2521restart:
3f7e5c33 2522 schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
5eae00c5
GR		 2523 return;
2524
2525err_register:
2526 i40evf_free_misc_irq(adapter);
2527err_sw_init:
2528 i40evf_reset_interrupt_capability(adapter);
5eae00c5
GR		 2529err_alloc:
2530 kfree(adapter->vf_res);
2531 adapter->vf_res = NULL;
2532err:
2533 /* Things went into the weeds, so try again later */
2534 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
b9029e94 2535 dev_err(&pdev->dev, "Failed to communicate with PF; waiting before retry\n");
ef8693eb 2536 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
b9029e94
MW		 2537 i40evf_shutdown_adminq(hw);
2538 adapter->state = __I40EVF_STARTUP;
2539 schedule_delayed_work(&adapter->init_task, HZ * 5);
2540 return;
5eae00c5 2541 }
3f7e5c33 2542 schedule_delayed_work(&adapter->init_task, HZ);
5eae00c5
GR		 2543}
2544
2545/**
2546 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2547 * @pdev: pci device structure
2548 **/
2549static void i40evf_shutdown(struct pci_dev *pdev)
2550{
2551 struct net_device *netdev = pci_get_drvdata(pdev);
00293fdc 2552 struct i40evf_adapter *adapter = netdev_priv(netdev);
5eae00c5
GR		 2553
2554 netif_device_detach(netdev);
2555
2556 if (netif_running(netdev))
2557 i40evf_close(netdev);
2558
00293fdc
MW		 2559 /* Prevent the watchdog from running. */
2560 adapter->state = __I40EVF_REMOVE;
2561 adapter->aq_required = 0;
00293fdc 2562
5eae00c5
GR		 2563#ifdef CONFIG_PM
2564 pci_save_state(pdev);
2565
2566#endif
2567 pci_disable_device(pdev);
2568}
2569
2570/**
2571 * i40evf_probe - Device Initialization Routine
2572 * @pdev: PCI device information struct
2573 * @ent: entry in i40evf_pci_tbl
2574 *
2575 * Returns 0 on success, negative on failure
2576 *
2577 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2578 * The OS initialization, configuring of the adapter private structure,
2579 * and a hardware reset occur.
2580 **/
2581static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2582{
2583 struct net_device *netdev;
2584 struct i40evf_adapter *adapter = NULL;
2585 struct i40e_hw *hw = NULL;
dbbd8111 2586 int err;
5eae00c5
GR		 2587
2588 err = pci_enable_device(pdev);
2589 if (err)
2590 return err;
2591
6494294f 2592 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
6494294f 2593 if (err) {
e3e3bfdd
JS		 2594 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2595 if (err) {
2596 dev_err(&pdev->dev,
2597 "DMA configuration failed: 0x%x\n", err);
2598 goto err_dma;
2599 }
5eae00c5
GR		 2600 }
2601
2602 err = pci_request_regions(pdev, i40evf_driver_name);
2603 if (err) {
2604 dev_err(&pdev->dev,
2605 "pci_request_regions failed 0x%x\n", err);
2606 goto err_pci_reg;
2607 }
2608
2609 pci_enable_pcie_error_reporting(pdev);
2610
2611 pci_set_master(pdev);
2612
2613 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2614 MAX_TX_QUEUES);
2615 if (!netdev) {
2616 err = -ENOMEM;
2617 goto err_alloc_etherdev;
2618 }
2619
2620 SET_NETDEV_DEV(netdev, &pdev->dev);
2621
2622 pci_set_drvdata(pdev, netdev);
2623 adapter = netdev_priv(netdev);
5eae00c5
GR		 2624
2625 adapter->netdev = netdev;
2626 adapter->pdev = pdev;
2627
2628 hw = &adapter->hw;
2629 hw->back = adapter;
2630
41a1d04b 2631 adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
5eae00c5
GR		 2632 adapter->state = __I40EVF_STARTUP;
2633
2634 /* Call save state here because it relies on the adapter struct. */
2635 pci_save_state(pdev);
2636
2637 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2638 pci_resource_len(pdev, 0));
2639 if (!hw->hw_addr) {
2640 err = -EIO;
2641 goto err_ioremap;
2642 }
2643 hw->vendor_id = pdev->vendor;
2644 hw->device_id = pdev->device;
2645 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2646 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2647 hw->subsystem_device_id = pdev->subsystem_device;
2648 hw->bus.device = PCI_SLOT(pdev->devfn);
2649 hw->bus.func = PCI_FUNC(pdev->devfn);
2650
8bb1a540
SK		 2651 INIT_LIST_HEAD(&adapter->mac_filter_list);
2652 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2653
5eae00c5
GR		 2654 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2655 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2656 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2657 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
9b32b0b5
MW		 2658 schedule_delayed_work(&adapter->init_task,
2659 msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
5eae00c5
GR		 2660
2661 return 0;
2662
2663err_ioremap:
2664 free_netdev(netdev);
2665err_alloc_etherdev:
2666 pci_release_regions(pdev);
2667err_pci_reg:
2668err_dma:
2669 pci_disable_device(pdev);
2670 return err;
2671}
2672
2673#ifdef CONFIG_PM
2674/**
2675 * i40evf_suspend - Power management suspend routine
2676 * @pdev: PCI device information struct
2677 * @state: unused
2678 *
2679 * Called when the system (VM) is entering sleep/suspend.
2680 **/
2681static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2682{
2683 struct net_device *netdev = pci_get_drvdata(pdev);
2684 struct i40evf_adapter *adapter = netdev_priv(netdev);
2685 int retval = 0;
2686
2687 netif_device_detach(netdev);
2688
2689 if (netif_running(netdev)) {
2690 rtnl_lock();
2691 i40evf_down(adapter);
2692 rtnl_unlock();
2693 }
2694 i40evf_free_misc_irq(adapter);
2695 i40evf_reset_interrupt_capability(adapter);
2696
2697 retval = pci_save_state(pdev);
2698 if (retval)
2699 return retval;
2700
2701 pci_disable_device(pdev);
2702
2703 return 0;
2704}
2705
2706/**
dbedd44e 2707 * i40evf_resume - Power management resume routine
5eae00c5
GR		 2708 * @pdev: PCI device information struct
2709 *
2710 * Called when the system (VM) is resumed from sleep/suspend.
2711 **/
2712static int i40evf_resume(struct pci_dev *pdev)
2713{
2714 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2715 struct net_device *netdev = adapter->netdev;
2716 u32 err;
2717
2718 pci_set_power_state(pdev, PCI_D0);
2719 pci_restore_state(pdev);
2720 /* pci_restore_state clears dev->state_saved so call
2721 * pci_save_state to restore it.
2722 */
2723 pci_save_state(pdev);
2724
2725 err = pci_enable_device_mem(pdev);
2726 if (err) {
2727 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2728 return err;
2729 }
2730 pci_set_master(pdev);
2731
2732 rtnl_lock();
2733 err = i40evf_set_interrupt_capability(adapter);
2734 if (err) {
f2a1c368 2735 rtnl_unlock();
5eae00c5
GR		 2736 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2737 return err;
2738 }
2739 err = i40evf_request_misc_irq(adapter);
2740 rtnl_unlock();
2741 if (err) {
2742 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2743 return err;
2744 }
2745
2746 schedule_work(&adapter->reset_task);
2747
2748 netif_device_attach(netdev);
2749
2750 return err;
2751}
2752
2753#endif /* CONFIG_PM */
2754/**
2755 * i40evf_remove - Device Removal Routine
2756 * @pdev: PCI device information struct
2757 *
2758 * i40evf_remove is called by the PCI subsystem to alert the driver
2759 * that it should release a PCI device. The could be caused by a
2760 * Hot-Plug event, or because the driver is going to be removed from
2761 * memory.
2762 **/
2763static void i40evf_remove(struct pci_dev *pdev)
2764{
2765 struct net_device *netdev = pci_get_drvdata(pdev);
2766 struct i40evf_adapter *adapter = netdev_priv(netdev);
6ba36a24 2767 struct i40evf_mac_filter *f, *ftmp;
5eae00c5
GR		 2768 struct i40e_hw *hw = &adapter->hw;
2769
2770 cancel_delayed_work_sync(&adapter->init_task);
ef8693eb 2771 cancel_work_sync(&adapter->reset_task);
5eae00c5
GR		 2772
2773 if (adapter->netdev_registered) {
2774 unregister_netdev(netdev);
2775 adapter->netdev_registered = false;
2776 }
53d0b3ae 2777
f4a71881 2778 /* Shut down all the garbage mashers on the detention level */
5eae00c5 2779 adapter->state = __I40EVF_REMOVE;
f4a71881 2780 adapter->aq_required = 0;
f4a71881
MW		 2781 i40evf_request_reset(adapter);
2782 msleep(20);
2783 /* If the FW isn't responding, kick it once, but only once. */
2784 if (!i40evf_asq_done(hw)) {
2785 i40evf_request_reset(adapter);
2786 msleep(20);
2787 }
5eae00c5 2788
dbb01c8a 2789 if (adapter->msix_entries) {
5eae00c5 2790 i40evf_misc_irq_disable(adapter);
5eae00c5 2791 i40evf_free_misc_irq(adapter);
5eae00c5 2792 i40evf_reset_interrupt_capability(adapter);
d31944d6 2793 i40evf_free_q_vectors(adapter);
5eae00c5
GR		 2794 }
2795
e5d17c3e
MW		 2796 if (adapter->watchdog_timer.function)
2797 del_timer_sync(&adapter->watchdog_timer);
2798
dbb01c8a
MW		 2799 flush_scheduled_work();
2800
66f9af85
HZ		 2801 /* Clear user configurations for RSS */
2802 i40evf_clear_rss_config_user(&adapter->vsi);
2803
5eae00c5
GR		 2804 if (hw->aq.asq.count)
2805 i40evf_shutdown_adminq(hw);
2806
2807 iounmap(hw->hw_addr);
2808 pci_release_regions(pdev);
2809
e284fc88
MW		 2810 i40evf_free_all_tx_resources(adapter);
2811 i40evf_free_all_rx_resources(adapter);
5eae00c5
GR		 2812 i40evf_free_queues(adapter);
2813 kfree(adapter->vf_res);
6ba36a24
MW		 2814 /* If we got removed before an up/down sequence, we've got a filter
2815 * hanging out there that we need to get rid of.
2816 */
2817 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2818 list_del(&f->list);
2819 kfree(f);
2820 }
37dfdf37
MW		 2821 list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2822 list_del(&f->list);
2823 kfree(f);
2824 }
5eae00c5
GR		 2825
2826 free_netdev(netdev);
2827
2828 pci_disable_pcie_error_reporting(pdev);
2829
2830 pci_disable_device(pdev);
2831}
2832
2833static struct pci_driver i40evf_driver = {
2834 .name = i40evf_driver_name,
2835 .id_table = i40evf_pci_tbl,
2836 .probe = i40evf_probe,
2837 .remove = i40evf_remove,
2838#ifdef CONFIG_PM
2839 .suspend = i40evf_suspend,
2840 .resume = i40evf_resume,
2841#endif
2842 .shutdown = i40evf_shutdown,
2843};
2844
2845/**
2846 * i40e_init_module - Driver Registration Routine
2847 *
2848 * i40e_init_module is the first routine called when the driver is
2849 * loaded. All it does is register with the PCI subsystem.
2850 **/
2851static int __init i40evf_init_module(void)
2852{
2853 int ret;
75a64435 2854
5eae00c5 2855 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
75a64435 2856 i40evf_driver_version);
5eae00c5
GR		 2857
2858 pr_info("%s\n", i40evf_copyright);
2859
2860 ret = pci_register_driver(&i40evf_driver);
2861 return ret;
2862}
2863
2864module_init(i40evf_init_module);
2865
2866/**
2867 * i40e_exit_module - Driver Exit Cleanup Routine
2868 *
2869 * i40e_exit_module is called just before the driver is removed
2870 * from memory.
2871 **/
2872static void __exit i40evf_exit_module(void)
2873{
2874 pci_unregister_driver(&i40evf_driver);
2875}
2876
2877module_exit(i40evf_exit_module);
2878
2879/* i40evf_main.c */
Linux kernel - Deliverables
This page took 0.392157 seconds and 5 git commands to generate.