projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
i40e: reset the invalid msg counter in vf when a valid msg is received
[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
164f7393 37#define DRV_VERSION "1.3.19"
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
285 **/
286void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
287{
288 struct i40e_hw *hw = &adapter->hw;
289
164ec1bf 290 i40evf_misc_irq_enable(adapter);
5eae00c5
GR		 291 i40evf_irq_enable_queues(adapter, ~0);
292
293 if (flush)
294 rd32(hw, I40E_VFGEN_RSTAT);
295}
296
297/**
298 * i40evf_msix_aq - Interrupt handler for vector 0
299 * @irq: interrupt number
300 * @data: pointer to netdev
301 **/
302static irqreturn_t i40evf_msix_aq(int irq, void *data)
303{
304 struct net_device *netdev = data;
305 struct i40evf_adapter *adapter = netdev_priv(netdev);
306 struct i40e_hw *hw = &adapter->hw;
307 u32 val;
308 u32 ena_mask;
309
310 /* handle non-queue interrupts */
311 val = rd32(hw, I40E_VFINT_ICR01);
312 ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
313
314
315 val = rd32(hw, I40E_VFINT_DYN_CTL01);
b1f3366b 316 val = val | I40E_VFINT_DYN_CTL01_CLEARPBA_MASK;
5eae00c5
GR		 317 wr32(hw, I40E_VFINT_DYN_CTL01, val);
318
5eae00c5
GR		 319 /* schedule work on the private workqueue */
320 schedule_work(&adapter->adminq_task);
321
322 return IRQ_HANDLED;
323}
324
325/**
326 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
327 * @irq: interrupt number
328 * @data: pointer to a q_vector
329 **/
330static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
331{
332 struct i40e_q_vector *q_vector = data;
333
334 if (!q_vector->tx.ring && !q_vector->rx.ring)
335 return IRQ_HANDLED;
336
337 napi_schedule(&q_vector->napi);
338
339 return IRQ_HANDLED;
340}
341
342/**
343 * i40evf_map_vector_to_rxq - associate irqs with rx queues
344 * @adapter: board private structure
345 * @v_idx: interrupt number
346 * @r_idx: queue number
347 **/
348static void
349i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
350{
351 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
352 struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
353
354 rx_ring->q_vector = q_vector;
355 rx_ring->next = q_vector->rx.ring;
356 rx_ring->vsi = &adapter->vsi;
357 q_vector->rx.ring = rx_ring;
358 q_vector->rx.count++;
359 q_vector->rx.latency_range = I40E_LOW_LATENCY;
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;
380 q_vector->num_ringpairs++;
41a1d04b 381 q_vector->ring_mask |= BIT(t_idx);
5eae00c5
GR		 382}
383
384/**
385 * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
386 * @adapter: board private structure to initialize
387 *
388 * This function maps descriptor rings to the queue-specific vectors
389 * we were allotted through the MSI-X enabling code. Ideally, we'd have
390 * one vector per ring/queue, but on a constrained vector budget, we
391 * group the rings as "efficiently" as possible. You would add new
392 * mapping configurations in here.
393 **/
394static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
395{
396 int q_vectors;
397 int v_start = 0;
398 int rxr_idx = 0, txr_idx = 0;
cc052927
MW		 399 int rxr_remaining = adapter->num_active_queues;
400 int txr_remaining = adapter->num_active_queues;
5eae00c5
GR		 401 int i, j;
402 int rqpv, tqpv;
403 int err = 0;
404
405 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
406
407 /* The ideal configuration...
408 * We have enough vectors to map one per queue.
409 */
973371da 410 if (q_vectors >= (rxr_remaining * 2)) {
5eae00c5
GR		 411 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
412 i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
413
414 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
415 i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
416 goto out;
417 }
418
419 /* If we don't have enough vectors for a 1-to-1
420 * mapping, we'll have to group them so there are
421 * multiple queues per vector.
422 * Re-adjusting *qpv takes care of the remainder.
423 */
424 for (i = v_start; i < q_vectors; i++) {
425 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
426 for (j = 0; j < rqpv; j++) {
427 i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
428 rxr_idx++;
429 rxr_remaining--;
430 }
431 }
432 for (i = v_start; i < q_vectors; i++) {
433 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
434 for (j = 0; j < tqpv; j++) {
435 i40evf_map_vector_to_txq(adapter, i, txr_idx);
436 txr_idx++;
437 txr_remaining--;
438 }
439 }
440
441out:
442 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
443
444 return err;
445}
446
7709b4c1
AD		 447#ifdef CONFIG_NET_POLL_CONTROLLER
448/**
449 * i40evf_netpoll - A Polling 'interrupt' handler
450 * @netdev: network interface device structure
451 *
452 * This is used by netconsole to send skbs without having to re-enable
453 * interrupts. It's not called while the normal interrupt routine is executing.
454 **/
455static void i40evf_netpoll(struct net_device *netdev)
456{
457 struct i40evf_adapter *adapter = netdev_priv(netdev);
458 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
459 int i;
460
461 /* if interface is down do nothing */
462 if (test_bit(__I40E_DOWN, &adapter->vsi.state))
463 return;
464
465 for (i = 0; i < q_vectors; i++)
466 i40evf_msix_clean_rings(0, adapter->q_vector[i]);
467}
468
469#endif
5eae00c5
GR		 470/**
471 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
472 * @adapter: board private structure
473 *
474 * Allocates MSI-X vectors for tx and rx handling, and requests
475 * interrupts from the kernel.
476 **/
477static int
478i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
479{
480 int vector, err, q_vectors;
481 int rx_int_idx = 0, tx_int_idx = 0;
482
483 i40evf_irq_disable(adapter);
484 /* Decrement for Other and TCP Timer vectors */
485 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
486
487 for (vector = 0; vector < q_vectors; vector++) {
488 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
489
490 if (q_vector->tx.ring && q_vector->rx.ring) {
491 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
492 "i40evf-%s-%s-%d", basename,
493 "TxRx", rx_int_idx++);
494 tx_int_idx++;
495 } else if (q_vector->rx.ring) {
496 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
497 "i40evf-%s-%s-%d", basename,
498 "rx", rx_int_idx++);
499 } else if (q_vector->tx.ring) {
500 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
501 "i40evf-%s-%s-%d", basename,
502 "tx", tx_int_idx++);
503 } else {
504 /* skip this unused q_vector */
505 continue;
506 }
507 err = request_irq(
508 adapter->msix_entries[vector + NONQ_VECS].vector,
509 i40evf_msix_clean_rings,
510 0,
511 q_vector->name,
512 q_vector);
513 if (err) {
514 dev_info(&adapter->pdev->dev,
fb43201f 515 "Request_irq failed, error: %d\n", err);
5eae00c5
GR		 516 goto free_queue_irqs;
517 }
518 /* assign the mask for this irq */
519 irq_set_affinity_hint(
520 adapter->msix_entries[vector + NONQ_VECS].vector,
521 q_vector->affinity_mask);
522 }
523
524 return 0;
525
526free_queue_irqs:
527 while (vector) {
528 vector--;
529 irq_set_affinity_hint(
530 adapter->msix_entries[vector + NONQ_VECS].vector,
531 NULL);
532 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
533 adapter->q_vector[vector]);
534 }
535 return err;
536}
537
538/**
539 * i40evf_request_misc_irq - Initialize MSI-X interrupts
540 * @adapter: board private structure
541 *
542 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
543 * vector is only for the admin queue, and stays active even when the netdev
544 * is closed.
545 **/
546static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
547{
548 struct net_device *netdev = adapter->netdev;
549 int err;
550
b39c1e2c 551 snprintf(adapter->misc_vector_name,
9a21a007
CW		 552 sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
553 dev_name(&adapter->pdev->dev));
5eae00c5 554 err = request_irq(adapter->msix_entries[0].vector,
e1dfee8e
MW		 555 &i40evf_msix_aq, 0,
556 adapter->misc_vector_name, netdev);
5eae00c5
GR		 557 if (err) {
558 dev_err(&adapter->pdev->dev,
77fa28be
CS		 559 "request_irq for %s failed: %d\n",
560 adapter->misc_vector_name, err);
5eae00c5
GR		 561 free_irq(adapter->msix_entries[0].vector, netdev);
562 }
563 return err;
564}
565
566/**
567 * i40evf_free_traffic_irqs - Free MSI-X interrupts
568 * @adapter: board private structure
569 *
570 * Frees all MSI-X vectors other than 0.
571 **/
572static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
573{
574 int i;
575 int q_vectors;
75a64435 576
5eae00c5
GR		 577 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
578
579 for (i = 0; i < q_vectors; i++) {
580 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
581 NULL);
582 free_irq(adapter->msix_entries[i+1].vector,
583 adapter->q_vector[i]);
584 }
585}
586
587/**
588 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
589 * @adapter: board private structure
590 *
591 * Frees MSI-X vector 0.
592 **/
593static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
594{
595 struct net_device *netdev = adapter->netdev;
596
597 free_irq(adapter->msix_entries[0].vector, netdev);
598}
599
600/**
601 * i40evf_configure_tx - Configure Transmit Unit after Reset
602 * @adapter: board private structure
603 *
604 * Configure the Tx unit of the MAC after a reset.
605 **/
606static void i40evf_configure_tx(struct i40evf_adapter *adapter)
607{
608 struct i40e_hw *hw = &adapter->hw;
609 int i;
75a64435 610
cc052927 611 for (i = 0; i < adapter->num_active_queues; i++)
5eae00c5
GR		 612 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
613}
614
615/**
616 * i40evf_configure_rx - Configure Receive Unit after Reset
617 * @adapter: board private structure
618 *
619 * Configure the Rx unit of the MAC after a reset.
620 **/
621static void i40evf_configure_rx(struct i40evf_adapter *adapter)
622{
623 struct i40e_hw *hw = &adapter->hw;
624 struct net_device *netdev = adapter->netdev;
625 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
626 int i;
627 int rx_buf_len;
628
629
630 adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
631 adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
632
633 /* Decide whether to use packet split mode or not */
634 if (netdev->mtu > ETH_DATA_LEN) {
635 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
636 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
637 else
638 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
639 } else {
640 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
641 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
642 else
643 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
644 }
645
646 /* Set the RX buffer length according to the mode */
647 if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
648 rx_buf_len = I40E_RX_HDR_SIZE;
649 } else {
650 if (netdev->mtu <= ETH_DATA_LEN)
651 rx_buf_len = I40EVF_RXBUFFER_2048;
652 else
653 rx_buf_len = ALIGN(max_frame, 1024);
654 }
655
cc052927 656 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5
GR		 657 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
658 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
659 }
660}
661
662/**
663 * i40evf_find_vlan - Search filter list for specific vlan filter
664 * @adapter: board private structure
665 * @vlan: vlan tag
666 *
667 * Returns ptr to the filter object or NULL
668 **/
669static struct
670i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
671{
672 struct i40evf_vlan_filter *f;
673
674 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
675 if (vlan == f->vlan)
676 return f;
677 }
678 return NULL;
679}
680
681/**
682 * i40evf_add_vlan - Add a vlan filter to the list
683 * @adapter: board private structure
684 * @vlan: VLAN tag
685 *
686 * Returns ptr to the filter object or NULL when no memory available.
687 **/
688static struct
689i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
690{
13acb546
MW		 691 struct i40evf_vlan_filter *f = NULL;
692 int count = 50;
693
694 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
695 &adapter->crit_section)) {
696 udelay(1);
697 if (--count == 0)
698 goto out;
699 }
5eae00c5
GR		 700
701 f = i40evf_find_vlan(adapter, vlan);
348d4994 702 if (!f) {
5eae00c5 703 f = kzalloc(sizeof(*f), GFP_ATOMIC);
348d4994 704 if (!f)
13acb546 705 goto clearout;
249c8b8d 706
5eae00c5
GR		 707 f->vlan = vlan;
708
709 INIT_LIST_HEAD(&f->list);
710 list_add(&f->list, &adapter->vlan_filter_list);
711 f->add = true;
712 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
713 }
714
13acb546
MW		 715clearout:
716 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
717out:
5eae00c5
GR		 718 return f;
719}
720
721/**
722 * i40evf_del_vlan - Remove a vlan filter from the list
723 * @adapter: board private structure
724 * @vlan: VLAN tag
725 **/
726static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
727{
728 struct i40evf_vlan_filter *f;
13acb546
MW		 729 int count = 50;
730
731 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
732 &adapter->crit_section)) {
733 udelay(1);
734 if (--count == 0)
735 return;
736 }
5eae00c5
GR		 737
738 f = i40evf_find_vlan(adapter, vlan);
739 if (f) {
740 f->remove = true;
741 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
742 }
13acb546 743 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
5eae00c5
GR		 744}
745
746/**
747 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
748 * @netdev: network device struct
749 * @vid: VLAN tag
750 **/
751static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
75a64435 752 __always_unused __be16 proto, u16 vid)
5eae00c5
GR		 753{
754 struct i40evf_adapter *adapter = netdev_priv(netdev);
755
8ed995ff
MW		 756 if (!VLAN_ALLOWED(adapter))
757 return -EIO;
5eae00c5
GR		 758 if (i40evf_add_vlan(adapter, vid) == NULL)
759 return -ENOMEM;
760 return 0;
761}
762
763/**
764 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
765 * @netdev: network device struct
766 * @vid: VLAN tag
767 **/
768static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
75a64435 769 __always_unused __be16 proto, u16 vid)
5eae00c5
GR		 770{
771 struct i40evf_adapter *adapter = netdev_priv(netdev);
772
8ed995ff
MW		 773 if (VLAN_ALLOWED(adapter)) {
774 i40evf_del_vlan(adapter, vid);
775 return 0;
776 }
777 return -EIO;
5eae00c5
GR		 778}
779
780/**
781 * i40evf_find_filter - Search filter list for specific mac filter
782 * @adapter: board private structure
783 * @macaddr: the MAC address
784 *
785 * Returns ptr to the filter object or NULL
786 **/
787static struct
788i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
789 u8 *macaddr)
790{
791 struct i40evf_mac_filter *f;
792
793 if (!macaddr)
794 return NULL;
795
796 list_for_each_entry(f, &adapter->mac_filter_list, list) {
797 if (ether_addr_equal(macaddr, f->macaddr))
798 return f;
799 }
800 return NULL;
801}
802
803/**
804 * i40e_add_filter - Add a mac filter to the filter list
805 * @adapter: board private structure
806 * @macaddr: the MAC address
807 *
808 * Returns ptr to the filter object or NULL when no memory available.
809 **/
810static struct
811i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
812 u8 *macaddr)
813{
814 struct i40evf_mac_filter *f;
54e16f64 815 int count = 50;
5eae00c5
GR		 816
817 if (!macaddr)
818 return NULL;
819
820 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
54e16f64 821 &adapter->crit_section)) {
b65476cd 822 udelay(1);
54e16f64
MW		 823 if (--count == 0)
824 return NULL;
825 }
5eae00c5
GR		 826
827 f = i40evf_find_filter(adapter, macaddr);
348d4994 828 if (!f) {
5eae00c5 829 f = kzalloc(sizeof(*f), GFP_ATOMIC);
348d4994 830 if (!f) {
5eae00c5
GR		 831 clear_bit(__I40EVF_IN_CRITICAL_TASK,
832 &adapter->crit_section);
833 return NULL;
834 }
835
9a173901 836 ether_addr_copy(f->macaddr, macaddr);
5eae00c5
GR		 837
838 list_add(&f->list, &adapter->mac_filter_list);
839 f->add = true;
840 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
841 }
842
843 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
844 return f;
845}
846
847/**
848 * i40evf_set_mac - NDO callback to set port mac address
849 * @netdev: network interface device structure
850 * @p: pointer to an address structure
851 *
852 * Returns 0 on success, negative on failure
853 **/
854static int i40evf_set_mac(struct net_device *netdev, void *p)
855{
856 struct i40evf_adapter *adapter = netdev_priv(netdev);
857 struct i40e_hw *hw = &adapter->hw;
858 struct i40evf_mac_filter *f;
859 struct sockaddr *addr = p;
860
861 if (!is_valid_ether_addr(addr->sa_data))
862 return -EADDRNOTAVAIL;
863
864 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
865 return 0;
866
14e52ee2
MW		 867 if (adapter->flags & I40EVF_FLAG_ADDR_SET_BY_PF)
868 return -EPERM;
869
870 f = i40evf_find_filter(adapter, hw->mac.addr);
871 if (f) {
872 f->remove = true;
873 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
874 }
875
5eae00c5
GR		 876 f = i40evf_add_filter(adapter, addr->sa_data);
877 if (f) {
9a173901
GR		 878 ether_addr_copy(hw->mac.addr, addr->sa_data);
879 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
5eae00c5
GR		 880 }
881
882 return (f == NULL) ? -ENOMEM : 0;
883}
884
885/**
886 * i40evf_set_rx_mode - NDO callback to set the netdev filters
887 * @netdev: network interface device structure
888 **/
889static void i40evf_set_rx_mode(struct net_device *netdev)
890{
891 struct i40evf_adapter *adapter = netdev_priv(netdev);
892 struct i40evf_mac_filter *f, *ftmp;
893 struct netdev_hw_addr *uca;
894 struct netdev_hw_addr *mca;
2f41f335 895 struct netdev_hw_addr *ha;
54e16f64 896 int count = 50;
5eae00c5
GR		 897
898 /* add addr if not already in the filter list */
899 netdev_for_each_uc_addr(uca, netdev) {
900 i40evf_add_filter(adapter, uca->addr);
901 }
902 netdev_for_each_mc_addr(mca, netdev) {
903 i40evf_add_filter(adapter, mca->addr);
904 }
905
906 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
54e16f64 907 &adapter->crit_section)) {
b65476cd 908 udelay(1);
54e16f64
MW		 909 if (--count == 0) {
910 dev_err(&adapter->pdev->dev,
911 "Failed to get lock in %s\n", __func__);
912 return;
913 }
914 }
5eae00c5
GR		 915 /* remove filter if not in netdev list */
916 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2f41f335
SN		 917 netdev_for_each_mc_addr(mca, netdev)
918 if (ether_addr_equal(mca->addr, f->macaddr))
919 goto bottom_of_search_loop;
920
921 netdev_for_each_uc_addr(uca, netdev)
922 if (ether_addr_equal(uca->addr, f->macaddr))
923 goto bottom_of_search_loop;
924
925 for_each_dev_addr(netdev, ha)
926 if (ether_addr_equal(ha->addr, f->macaddr))
927 goto bottom_of_search_loop;
928
929 if (ether_addr_equal(f->macaddr, adapter->hw.mac.addr))
930 goto bottom_of_search_loop;
931
932 /* f->macaddr wasn't found in uc, mc, or ha list so delete it */
933 f->remove = true;
934 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
935
936bottom_of_search_loop:
937 continue;
5eae00c5
GR		 938 }
939 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
940}
941
942/**
943 * i40evf_napi_enable_all - enable NAPI on all queue vectors
944 * @adapter: board private structure
945 **/
946static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
947{
948 int q_idx;
949 struct i40e_q_vector *q_vector;
950 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
951
952 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
953 struct napi_struct *napi;
75a64435 954
5eae00c5
GR		 955 q_vector = adapter->q_vector[q_idx];
956 napi = &q_vector->napi;
957 napi_enable(napi);
958 }
959}
960
961/**
962 * i40evf_napi_disable_all - disable NAPI on all queue vectors
963 * @adapter: board private structure
964 **/
965static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
966{
967 int q_idx;
968 struct i40e_q_vector *q_vector;
969 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
970
971 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
972 q_vector = adapter->q_vector[q_idx];
973 napi_disable(&q_vector->napi);
974 }
975}
976
977/**
978 * i40evf_configure - set up transmit and receive data structures
979 * @adapter: board private structure
980 **/
981static void i40evf_configure(struct i40evf_adapter *adapter)
982{
983 struct net_device *netdev = adapter->netdev;
984 int i;
985
986 i40evf_set_rx_mode(netdev);
987
988 i40evf_configure_tx(adapter);
989 i40evf_configure_rx(adapter);
990 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
991
cc052927 992 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5 993 struct i40e_ring *ring = adapter->rx_rings[i];
75a64435 994
a132af24 995 i40evf_alloc_rx_buffers_1buf(ring, ring->count);
5eae00c5
GR		 996 ring->next_to_use = ring->count - 1;
997 writel(ring->next_to_use, ring->tail);
998 }
999}
1000
1001/**
1002 * i40evf_up_complete - Finish the last steps of bringing up a connection
1003 * @adapter: board private structure
1004 **/
1005static int i40evf_up_complete(struct i40evf_adapter *adapter)
1006{
1007 adapter->state = __I40EVF_RUNNING;
1008 clear_bit(__I40E_DOWN, &adapter->vsi.state);
1009
1010 i40evf_napi_enable_all(adapter);
1011
1012 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
1013 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
1014 return 0;
1015}
1016
5eae00c5
GR		 1017/**
1018 * i40e_down - Shutdown the connection processing
1019 * @adapter: board private structure
1020 **/
1021void i40evf_down(struct i40evf_adapter *adapter)
1022{
1023 struct net_device *netdev = adapter->netdev;
1024 struct i40evf_mac_filter *f;
1025
ddf0b3a6
MW		 1026 if (adapter->state == __I40EVF_DOWN)
1027 return;
1028
53d0b3ae
MW		 1029 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1030 &adapter->crit_section))
1031 usleep_range(500, 1000);
1032
63e18c25
MW		 1033 netif_carrier_off(netdev);
1034 netif_tx_disable(netdev);
748c434b 1035 i40evf_napi_disable_all(adapter);
63e18c25 1036 i40evf_irq_disable(adapter);
53d0b3ae 1037
ef8693eb 1038 /* remove all MAC filters */
5eae00c5
GR		 1039 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1040 f->remove = true;
1041 }
ed1f5b58
MW		 1042 /* remove all VLAN filters */
1043 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1044 f->remove = true;
1045 }
ef8693eb
MW		 1046 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1047 adapter->state != __I40EVF_RESETTING) {
53d0b3ae
MW		 1048 /* cancel any current operation */
1049 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
53d0b3ae
MW		 1050 /* Schedule operations to close down the HW. Don't wait
1051 * here for this to complete. The watchdog is still running
1052 * and it will take care of this.
1053 */
1054 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
ed1f5b58 1055 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
ef8693eb 1056 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
ef8693eb 1057 }
5eae00c5 1058
53d0b3ae 1059 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
5eae00c5
GR		 1060}
1061
1062/**
1063 * i40evf_acquire_msix_vectors - Setup the MSIX capability
1064 * @adapter: board private structure
1065 * @vectors: number of vectors to request
1066 *
1067 * Work with the OS to set up the MSIX vectors needed.
1068 *
1069 * Returns 0 on success, negative on failure
1070 **/
1071static int
1072i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1073{
1074 int err, vector_threshold;
1075
1076 /* We'll want at least 3 (vector_threshold):
1077 * 0) Other (Admin Queue and link, mostly)
1078 * 1) TxQ[0] Cleanup
1079 * 2) RxQ[0] Cleanup
1080 */
1081 vector_threshold = MIN_MSIX_COUNT;
1082
1083 /* The more we get, the more we will assign to Tx/Rx Cleanup
1084 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1085 * Right now, we simply care about how many we'll get; we'll
1086 * set them up later while requesting irq's.
1087 */
fc2f2f5d
AG		 1088 err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1089 vector_threshold, vectors);
1090 if (err < 0) {
80e72893 1091 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
5eae00c5
GR		 1092 kfree(adapter->msix_entries);
1093 adapter->msix_entries = NULL;
fc2f2f5d 1094 return err;
5eae00c5 1095 }
fc2f2f5d
AG		 1096
1097 /* Adjust for only the vectors we'll use, which is minimum
1098 * of max_msix_q_vectors + NONQ_VECS, or the number of
1099 * vectors we were allocated.
1100 */
1101 adapter->num_msix_vectors = err;
1102 return 0;
5eae00c5
GR		 1103}
1104
1105/**
1106 * i40evf_free_queues - Free memory for all rings
1107 * @adapter: board private structure to initialize
1108 *
1109 * Free all of the memory associated with queue pairs.
1110 **/
1111static void i40evf_free_queues(struct i40evf_adapter *adapter)
1112{
1113 int i;
1114
1115 if (!adapter->vsi_res)
1116 return;
cc052927 1117 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5
GR		 1118 if (adapter->tx_rings[i])
1119 kfree_rcu(adapter->tx_rings[i], rcu);
1120 adapter->tx_rings[i] = NULL;
1121 adapter->rx_rings[i] = NULL;
1122 }
1123}
1124
1125/**
1126 * i40evf_alloc_queues - Allocate memory for all rings
1127 * @adapter: board private structure to initialize
1128 *
1129 * We allocate one ring per queue at run-time since we don't know the
1130 * number of queues at compile-time. The polling_netdev array is
1131 * intended for Multiqueue, but should work fine with a single queue.
1132 **/
1133static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1134{
1135 int i;
1136
cc052927 1137 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5
GR		 1138 struct i40e_ring *tx_ring;
1139 struct i40e_ring *rx_ring;
1140
75a64435 1141 tx_ring = kzalloc(sizeof(*tx_ring) * 2, GFP_KERNEL);
5eae00c5
GR		 1142 if (!tx_ring)
1143 goto err_out;
1144
1145 tx_ring->queue_index = i;
1146 tx_ring->netdev = adapter->netdev;
1147 tx_ring->dev = &adapter->pdev->dev;
d732a184 1148 tx_ring->count = adapter->tx_desc_count;
1f012279
ASJ		 1149 if (adapter->flags & I40E_FLAG_WB_ON_ITR_CAPABLE)
1150 tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR;
5eae00c5
GR		 1151 adapter->tx_rings[i] = tx_ring;
1152
1153 rx_ring = &tx_ring[1];
1154 rx_ring->queue_index = i;
1155 rx_ring->netdev = adapter->netdev;
1156 rx_ring->dev = &adapter->pdev->dev;
d732a184 1157 rx_ring->count = adapter->rx_desc_count;
5eae00c5
GR		 1158 adapter->rx_rings[i] = rx_ring;
1159 }
1160
1161 return 0;
1162
1163err_out:
1164 i40evf_free_queues(adapter);
1165 return -ENOMEM;
1166}
1167
1168/**
1169 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1170 * @adapter: board private structure to initialize
1171 *
1172 * Attempt to configure the interrupts using the best available
1173 * capabilities of the hardware and the kernel.
1174 **/
1175static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1176{
1177 int vector, v_budget;
1178 int pairs = 0;
1179 int err = 0;
1180
1181 if (!adapter->vsi_res) {
1182 err = -EIO;
1183 goto out;
1184 }
cc052927 1185 pairs = adapter->num_active_queues;
5eae00c5
GR		 1186
1187 /* It's easy to be greedy for MSI-X vectors, but it really
1188 * doesn't do us much good if we have a lot more vectors
1189 * than CPU's. So let's be conservative and only ask for
1190 * (roughly) twice the number of vectors as there are CPU's.
1191 */
30a500e2
MW		 1192 v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1193 v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
5eae00c5 1194
5eae00c5
GR		 1195 adapter->msix_entries = kcalloc(v_budget,
1196 sizeof(struct msix_entry), GFP_KERNEL);
1197 if (!adapter->msix_entries) {
1198 err = -ENOMEM;
1199 goto out;
1200 }
1201
1202 for (vector = 0; vector < v_budget; vector++)
1203 adapter->msix_entries[vector].entry = vector;
1204
313ed2d5 1205 err = i40evf_acquire_msix_vectors(adapter, v_budget);
5eae00c5
GR		 1206
1207out:
1208 adapter->netdev->real_num_tx_queues = pairs;
1209 return err;
1210}
1211
e25d00b8
ASJ		 1212/**
1213 * i40e_configure_rss_aq - Prepare for RSS using AQ commands
1214 * @vsi: vsi structure
1215 * @seed: RSS hash seed
1216 **/
1217static void i40evf_configure_rss_aq(struct i40e_vsi *vsi, const u8 *seed)
1218{
1219 struct i40e_aqc_get_set_rss_key_data rss_key;
1220 struct i40evf_adapter *adapter = vsi->back;
1221 struct i40e_hw *hw = &adapter->hw;
1222 int ret = 0, i;
1223 u8 *rss_lut;
1224
1225 if (!vsi->id)
1226 return;
1227
1228 if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
1229 /* bail because we already have a command pending */
1230 dev_err(&adapter->pdev->dev, "Cannot confiure RSS, command %d pending\n",
1231 adapter->current_op);
1232 return;
1233 }
1234
1235 memset(&rss_key, 0, sizeof(rss_key));
1236 memcpy(&rss_key, seed, sizeof(rss_key));
1237
1238 rss_lut = kzalloc(((I40E_VFQF_HLUT_MAX_INDEX + 1) * 4), GFP_KERNEL);
1239 if (!rss_lut)
1240 return;
1241
1242 /* Populate the LUT with max no. PF queues in round robin fashion */
1243 for (i = 0; i <= (I40E_VFQF_HLUT_MAX_INDEX * 4); i++)
1244 rss_lut[i] = i % adapter->num_active_queues;
1245
1246 ret = i40evf_aq_set_rss_key(hw, vsi->id, &rss_key);
1247 if (ret) {
1248 dev_err(&adapter->pdev->dev,
1249 "Cannot set RSS key, err %s aq_err %s\n",
1250 i40evf_stat_str(hw, ret),
1251 i40evf_aq_str(hw, hw->aq.asq_last_status));
1252 return;
1253 }
1254
1255 ret = i40evf_aq_set_rss_lut(hw, vsi->id, false, rss_lut,
1256 (I40E_VFQF_HLUT_MAX_INDEX + 1) * 4);
1257 if (ret)
1258 dev_err(&adapter->pdev->dev,
1259 "Cannot set RSS lut, err %s aq_err %s\n",
1260 i40evf_stat_str(hw, ret),
1261 i40evf_aq_str(hw, hw->aq.asq_last_status));
1262}
1263
1264/**
1265 * i40e_configure_rss_reg - Prepare for RSS if used
1266 * @adapter: board private structure
1267 * @seed: RSS hash seed
1268 **/
1269static void i40evf_configure_rss_reg(struct i40evf_adapter *adapter,
1270 const u8 *seed)
1271{
1272 struct i40e_hw *hw = &adapter->hw;
1273 u32 *seed_dw = (u32 *)seed;
1274 u32 cqueue = 0;
1275 u32 lut = 0;
1276 int i, j;
1277
1278 /* Fill out hash function seed */
1279 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1280 wr32(hw, I40E_VFQF_HKEY(i), seed_dw[i]);
1281
1282 /* Populate the LUT with max no. PF queues in round robin fashion */
1283 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
1284 lut = 0;
1285 for (j = 0; j < 4; j++) {
1286 if (cqueue == adapter->num_active_queues)
1287 cqueue = 0;
1288 lut |= ((cqueue) << (8 * j));
1289 cqueue++;
1290 }
1291 wr32(hw, I40E_VFQF_HLUT(i), lut);
1292 }
1293 i40e_flush(hw);
1294}
1295
1296/**
1297 * i40evf_configure_rss - Prepare for RSS
1298 * @adapter: board private structure
1299 **/
1300static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1301{
1302 struct i40e_hw *hw = &adapter->hw;
1303 u8 seed[I40EVF_HKEY_ARRAY_SIZE];
1304 u64 hena;
1305
1306 netdev_rss_key_fill((void *)seed, I40EVF_HKEY_ARRAY_SIZE);
1307
1308 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1309 hena = I40E_DEFAULT_RSS_HENA;
1310 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1311 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1312
1313 if (RSS_AQ(adapter))
1314 i40evf_configure_rss_aq(&adapter->vsi, seed);
1315 else
1316 i40evf_configure_rss_reg(adapter, seed);
1317}
1318
5eae00c5
GR		 1319/**
1320 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1321 * @adapter: board private structure to initialize
1322 *
1323 * We allocate one q_vector per queue interrupt. If allocation fails we
1324 * return -ENOMEM.
1325 **/
1326static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1327{
1328 int q_idx, num_q_vectors;
1329 struct i40e_q_vector *q_vector;
1330
1331 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1332
1333 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
75a64435 1334 q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL);
5eae00c5
GR		 1335 if (!q_vector)
1336 goto err_out;
1337 q_vector->adapter = adapter;
1338 q_vector->vsi = &adapter->vsi;
1339 q_vector->v_idx = q_idx;
1340 netif_napi_add(adapter->netdev, &q_vector->napi,
75a64435 1341 i40evf_napi_poll, NAPI_POLL_WEIGHT);
5eae00c5
GR		 1342 adapter->q_vector[q_idx] = q_vector;
1343 }
1344
1345 return 0;
1346
1347err_out:
1348 while (q_idx) {
1349 q_idx--;
1350 q_vector = adapter->q_vector[q_idx];
1351 netif_napi_del(&q_vector->napi);
1352 kfree(q_vector);
1353 adapter->q_vector[q_idx] = NULL;
1354 }
1355 return -ENOMEM;
1356}
1357
1358/**
1359 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1360 * @adapter: board private structure to initialize
1361 *
1362 * This function frees the memory allocated to the q_vectors. In addition if
1363 * NAPI is enabled it will delete any references to the NAPI struct prior
1364 * to freeing the q_vector.
1365 **/
1366static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1367{
1368 int q_idx, num_q_vectors;
1369 int napi_vectors;
1370
1371 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
cc052927 1372 napi_vectors = adapter->num_active_queues;
5eae00c5
GR		 1373
1374 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1375 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1376
1377 adapter->q_vector[q_idx] = NULL;
1378 if (q_idx < napi_vectors)
1379 netif_napi_del(&q_vector->napi);
1380 kfree(q_vector);
1381 }
1382}
1383
1384/**
1385 * i40evf_reset_interrupt_capability - Reset MSIX setup
1386 * @adapter: board private structure
1387 *
1388 **/
1389void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1390{
1391 pci_disable_msix(adapter->pdev);
1392 kfree(adapter->msix_entries);
1393 adapter->msix_entries = NULL;
5eae00c5
GR		 1394}
1395
1396/**
1397 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1398 * @adapter: board private structure to initialize
1399 *
1400 **/
1401int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1402{
1403 int err;
1404
1405 err = i40evf_set_interrupt_capability(adapter);
1406 if (err) {
1407 dev_err(&adapter->pdev->dev,
1408 "Unable to setup interrupt capabilities\n");
1409 goto err_set_interrupt;
1410 }
1411
1412 err = i40evf_alloc_q_vectors(adapter);
1413 if (err) {
1414 dev_err(&adapter->pdev->dev,
1415 "Unable to allocate memory for queue vectors\n");
1416 goto err_alloc_q_vectors;
1417 }
1418
1419 err = i40evf_alloc_queues(adapter);
1420 if (err) {
1421 dev_err(&adapter->pdev->dev,
1422 "Unable to allocate memory for queues\n");
1423 goto err_alloc_queues;
1424 }
1425
1426 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
75a64435
MW		 1427 (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1428 adapter->num_active_queues);
5eae00c5
GR		 1429
1430 return 0;
1431err_alloc_queues:
1432 i40evf_free_q_vectors(adapter);
1433err_alloc_q_vectors:
1434 i40evf_reset_interrupt_capability(adapter);
1435err_set_interrupt:
1436 return err;
1437}
1438
1439/**
1440 * i40evf_watchdog_timer - Periodic call-back timer
1441 * @data: pointer to adapter disguised as unsigned long
1442 **/
1443static void i40evf_watchdog_timer(unsigned long data)
1444{
1445 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
75a64435 1446
5eae00c5
GR		 1447 schedule_work(&adapter->watchdog_task);
1448 /* timer will be rescheduled in watchdog task */
1449}
1450
1451/**
1452 * i40evf_watchdog_task - Periodic call-back task
1453 * @work: pointer to work_struct
1454 **/
1455static void i40evf_watchdog_task(struct work_struct *work)
1456{
1457 struct i40evf_adapter *adapter = container_of(work,
75a64435
MW		 1458 struct i40evf_adapter,
1459 watchdog_task);
5eae00c5 1460 struct i40e_hw *hw = &adapter->hw;
ee5c1e92 1461 u32 reg_val;
5eae00c5 1462
ef8693eb
MW		 1463 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1464 goto restart_watchdog;
1465
1466 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
ee5c1e92
MW		 1467 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1468 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1469 if ((reg_val == I40E_VFR_VFACTIVE) ||
1470 (reg_val == I40E_VFR_COMPLETED)) {
ef8693eb
MW		 1471 /* A chance for redemption! */
1472 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1473 adapter->state = __I40EVF_STARTUP;
1474 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1475 schedule_delayed_work(&adapter->init_task, 10);
1476 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1477 &adapter->crit_section);
1478 /* Don't reschedule the watchdog, since we've restarted
1479 * the init task. When init_task contacts the PF and
1480 * gets everything set up again, it'll restart the
1481 * watchdog for us. Down, boy. Sit. Stay. Woof.
1482 */
1483 return;
1484 }
ef8693eb
MW		 1485 adapter->aq_required = 0;
1486 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5 1487 goto watchdog_done;
ef8693eb 1488 }
5eae00c5 1489
ef8693eb
MW		 1490 if ((adapter->state < __I40EVF_DOWN) ||
1491 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
5eae00c5
GR		 1492 goto watchdog_done;
1493
ef8693eb 1494 /* check for reset */
ee5c1e92
MW		 1495 reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
1496 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
5eae00c5 1497 adapter->state = __I40EVF_RESETTING;
ef8693eb 1498 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
249c8b8d 1499 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
5eae00c5 1500 schedule_work(&adapter->reset_task);
ef8693eb
MW		 1501 adapter->aq_required = 0;
1502 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 1503 goto watchdog_done;
1504 }
1505
1506 /* Process admin queue tasks. After init, everything gets done
1507 * here so we don't race on the admin queue.
1508 */
ed636960 1509 if (adapter->current_op) {
0758e7cb
MW		 1510 if (!i40evf_asq_done(hw)) {
1511 dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1512 i40evf_send_api_ver(adapter);
1513 }
5eae00c5 1514 goto watchdog_done;
0758e7cb 1515 }
e6d038de
MW		 1516 if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
1517 i40evf_send_vf_config_msg(adapter);
1518 goto watchdog_done;
1519 }
5eae00c5 1520
e284fc88
MW		 1521 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1522 i40evf_disable_queues(adapter);
1523 goto watchdog_done;
1524 }
1525
5eae00c5
GR		 1526 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1527 i40evf_map_queues(adapter);
1528 goto watchdog_done;
1529 }
1530
1531 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1532 i40evf_add_ether_addrs(adapter);
1533 goto watchdog_done;
1534 }
1535
1536 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1537 i40evf_add_vlans(adapter);
1538 goto watchdog_done;
1539 }
1540
1541 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1542 i40evf_del_ether_addrs(adapter);
1543 goto watchdog_done;
1544 }
1545
1546 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1547 i40evf_del_vlans(adapter);
1548 goto watchdog_done;
1549 }
1550
5eae00c5
GR		 1551 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1552 i40evf_configure_queues(adapter);
1553 goto watchdog_done;
1554 }
1555
1556 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1557 i40evf_enable_queues(adapter);
1558 goto watchdog_done;
1559 }
1560
e25d00b8
ASJ		 1561 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
1562 /* This message goes straight to the firmware, not the
1563 * PF, so we don't have to set current_op as we will
1564 * not get a response through the ARQ.
1565 */
1566 i40evf_configure_rss(adapter);
1567 adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
1568 goto watchdog_done;
1569 }
1570
5eae00c5
GR		 1571 if (adapter->state == __I40EVF_RUNNING)
1572 i40evf_request_stats(adapter);
5eae00c5 1573watchdog_done:
4870e176
MW		 1574 if (adapter->state == __I40EVF_RUNNING) {
1575 i40evf_irq_enable_queues(adapter, ~0);
1576 i40evf_fire_sw_int(adapter, 0xFF);
1577 } else {
1578 i40evf_fire_sw_int(adapter, 0x1);
1579 }
1580
ef8693eb
MW		 1581 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1582restart_watchdog:
d3e2edb7
AS		 1583 if (adapter->state == __I40EVF_REMOVE)
1584 return;
5eae00c5
GR		 1585 if (adapter->aq_required)
1586 mod_timer(&adapter->watchdog_timer,
1587 jiffies + msecs_to_jiffies(20));
1588 else
1589 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
5eae00c5
GR		 1590 schedule_work(&adapter->adminq_task);
1591}
1592
67c818a1
MW		 1593#define I40EVF_RESET_WAIT_MS 10
1594#define I40EVF_RESET_WAIT_COUNT 500
5eae00c5
GR		 1595/**
1596 * i40evf_reset_task - Call-back task to handle hardware reset
1597 * @work: pointer to work_struct
1598 *
1599 * During reset we need to shut down and reinitialize the admin queue
1600 * before we can use it to communicate with the PF again. We also clear
1601 * and reinit the rings because that context is lost as well.
1602 **/
1603static void i40evf_reset_task(struct work_struct *work)
1604{
ef8693eb
MW		 1605 struct i40evf_adapter *adapter = container_of(work,
1606 struct i40evf_adapter,
1607 reset_task);
ac833bbf 1608 struct net_device *netdev = adapter->netdev;
5eae00c5 1609 struct i40e_hw *hw = &adapter->hw;
ac833bbf 1610 struct i40evf_mac_filter *f;
ee5c1e92 1611 u32 reg_val;
ac833bbf 1612 int i = 0, err;
5eae00c5
GR		 1613
1614 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1615 &adapter->crit_section))
f98a2006 1616 usleep_range(500, 1000);
3526d800 1617
67c818a1 1618 i40evf_misc_irq_disable(adapter);
3526d800 1619 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
67c818a1
MW		 1620 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1621 /* Restart the AQ here. If we have been reset but didn't
1622 * detect it, or if the PF had to reinit, our AQ will be hosed.
1623 */
1624 i40evf_shutdown_adminq(hw);
1625 i40evf_init_adminq(hw);
3526d800
MW		 1626 i40evf_request_reset(adapter);
1627 }
67c818a1 1628 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
3526d800 1629
ef8693eb
MW		 1630 /* poll until we see the reset actually happen */
1631 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
ee5c1e92
MW		 1632 reg_val = rd32(hw, I40E_VF_ARQLEN1) &
1633 I40E_VF_ARQLEN1_ARQENABLE_MASK;
1634 if (!reg_val)
ef8693eb 1635 break;
ee5c1e92 1636 usleep_range(5000, 10000);
ef8693eb
MW		 1637 }
1638 if (i == I40EVF_RESET_WAIT_COUNT) {
67c818a1 1639 dev_info(&adapter->pdev->dev, "Never saw reset\n");
ef8693eb
MW		 1640 goto continue_reset; /* act like the reset happened */
1641 }
5eae00c5 1642
ef8693eb
MW		 1643 /* wait until the reset is complete and the PF is responding to us */
1644 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
ee5c1e92
MW		 1645 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1646 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1647 if (reg_val == I40E_VFR_VFACTIVE)
5eae00c5 1648 break;
c88e38cc 1649 msleep(I40EVF_RESET_WAIT_MS);
5eae00c5 1650 }
67c818a1
MW		 1651 /* extra wait to make sure minimum wait is met */
1652 msleep(I40EVF_RESET_WAIT_MS);
ef8693eb 1653 if (i == I40EVF_RESET_WAIT_COUNT) {
874d1a10 1654 struct i40evf_mac_filter *ftmp;
6ba36a24
MW		 1655 struct i40evf_vlan_filter *fv, *fvtmp;
1656
5eae00c5 1657 /* reset never finished */
80e72893 1658 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
ee5c1e92 1659 reg_val);
ef8693eb
MW		 1660 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1661
169f4076
MW		 1662 if (netif_running(adapter->netdev)) {
1663 set_bit(__I40E_DOWN, &adapter->vsi.state);
ac833bbf 1664 netif_carrier_off(netdev);
67c818a1
MW		 1665 netif_tx_disable(netdev);
1666 i40evf_napi_disable_all(adapter);
1667 i40evf_irq_disable(adapter);
169f4076
MW		 1668 i40evf_free_traffic_irqs(adapter);
1669 i40evf_free_all_tx_resources(adapter);
1670 i40evf_free_all_rx_resources(adapter);
1671 }
6ba36a24
MW		 1672
1673 /* Delete all of the filters, both MAC and VLAN. */
1674 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1675 list) {
1676 list_del(&f->list);
1677 kfree(f);
1678 }
67c818a1 1679
6ba36a24
MW		 1680 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1681 list) {
1682 list_del(&fv->list);
1683 kfree(fv);
1684 }
1685
ef8693eb
MW		 1686 i40evf_free_misc_irq(adapter);
1687 i40evf_reset_interrupt_capability(adapter);
1688 i40evf_free_queues(adapter);
d31944d6 1689 i40evf_free_q_vectors(adapter);
ef8693eb
MW		 1690 kfree(adapter->vf_res);
1691 i40evf_shutdown_adminq(hw);
1692 adapter->netdev->flags &= ~IFF_UP;
1693 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
67c818a1
MW		 1694 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1695 dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
ef8693eb 1696 return; /* Do not attempt to reinit. It's dead, Jim. */
5eae00c5 1697 }
ef8693eb
MW		 1698
1699continue_reset:
3c8e0b98 1700 if (netif_running(adapter->netdev)) {
3c8e0b98 1701 netif_carrier_off(netdev);
67c818a1
MW		 1702 netif_tx_stop_all_queues(netdev);
1703 i40evf_napi_disable_all(adapter);
3c8e0b98 1704 }
67c818a1 1705 i40evf_irq_disable(adapter);
ac833bbf 1706
5eae00c5 1707 adapter->state = __I40EVF_RESETTING;
67c818a1
MW		 1708 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1709
1710 /* free the Tx/Rx rings and descriptors, might be better to just
1711 * re-use them sometime in the future
1712 */
1713 i40evf_free_all_rx_resources(adapter);
1714 i40evf_free_all_tx_resources(adapter);
5eae00c5
GR		 1715
1716 /* kill and reinit the admin queue */
1717 if (i40evf_shutdown_adminq(hw))
ac833bbf
MW		 1718 dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
1719 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 1720 err = i40evf_init_adminq(hw);
1721 if (err)
ac833bbf
MW		 1722 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1723 err);
5eae00c5 1724
e6d038de
MW		 1725 adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG;
1726 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
ac833bbf
MW		 1727
1728 /* re-add all MAC filters */
1729 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1730 f->add = true;
1731 }
1732 /* re-add all VLAN filters */
1733 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1734 f->add = true;
1735 }
e6d038de 1736 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
ac833bbf 1737 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
5eae00c5 1738 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
67c818a1 1739 i40evf_misc_irq_enable(adapter);
5eae00c5
GR		 1740
1741 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1742
1743 if (netif_running(adapter->netdev)) {
1744 /* allocate transmit descriptors */
1745 err = i40evf_setup_all_tx_resources(adapter);
1746 if (err)
1747 goto reset_err;
1748
1749 /* allocate receive descriptors */
1750 err = i40evf_setup_all_rx_resources(adapter);
1751 if (err)
1752 goto reset_err;
1753
1754 i40evf_configure(adapter);
1755
1756 err = i40evf_up_complete(adapter);
1757 if (err)
1758 goto reset_err;
1759
1760 i40evf_irq_enable(adapter, true);
67c818a1
MW		 1761 } else {
1762 adapter->state = __I40EVF_DOWN;
5eae00c5 1763 }
67c818a1 1764
5eae00c5
GR		 1765 return;
1766reset_err:
80e72893 1767 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
5eae00c5
GR		 1768 i40evf_close(adapter->netdev);
1769}
1770
1771/**
1772 * i40evf_adminq_task - worker thread to clean the admin queue
1773 * @work: pointer to work_struct containing our data
1774 **/
1775static void i40evf_adminq_task(struct work_struct *work)
1776{
1777 struct i40evf_adapter *adapter =
1778 container_of(work, struct i40evf_adapter, adminq_task);
1779 struct i40e_hw *hw = &adapter->hw;
1780 struct i40e_arq_event_info event;
1781 struct i40e_virtchnl_msg *v_msg;
1782 i40e_status ret;
912257e5 1783 u32 val, oldval;
5eae00c5
GR		 1784 u16 pending;
1785
ef8693eb 1786 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
7235448c 1787 goto out;
ef8693eb 1788
1001dc37
MW		 1789 event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1790 event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
249c8b8d 1791 if (!event.msg_buf)
7235448c 1792 goto out;
249c8b8d 1793
5eae00c5
GR		 1794 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1795 do {
1796 ret = i40evf_clean_arq_element(hw, &event, &pending);
8b011ebb 1797 if (ret || !v_msg->v_opcode)
5eae00c5
GR		 1798 break; /* No event to process or error cleaning ARQ */
1799
1800 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1801 v_msg->v_retval, event.msg_buf,
1001dc37 1802 event.msg_len);
75a64435 1803 if (pending != 0)
5eae00c5 1804 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
5eae00c5
GR		 1805 } while (pending);
1806
67c818a1
MW		 1807 if ((adapter->flags &
1808 (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
1809 adapter->state == __I40EVF_RESETTING)
1810 goto freedom;
1811
912257e5
MW		 1812 /* check for error indications */
1813 val = rd32(hw, hw->aq.arq.len);
1814 oldval = val;
b1f3366b 1815 if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
912257e5 1816 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
b1f3366b 1817 val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
912257e5 1818 }
b1f3366b 1819 if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
912257e5 1820 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
b1f3366b 1821 val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
912257e5 1822 }
b1f3366b 1823 if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
912257e5 1824 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
b1f3366b 1825 val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
912257e5
MW		 1826 }
1827 if (oldval != val)
1828 wr32(hw, hw->aq.arq.len, val);
1829
1830 val = rd32(hw, hw->aq.asq.len);
1831 oldval = val;
b1f3366b 1832 if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
912257e5 1833 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
b1f3366b 1834 val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
912257e5 1835 }
b1f3366b 1836 if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
912257e5 1837 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
b1f3366b 1838 val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
912257e5 1839 }
b1f3366b 1840 if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
912257e5 1841 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
b1f3366b 1842 val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
912257e5
MW		 1843 }
1844 if (oldval != val)
1845 wr32(hw, hw->aq.asq.len, val);
1846
67c818a1 1847freedom:
7235448c
MW		 1848 kfree(event.msg_buf);
1849out:
5eae00c5
GR		 1850 /* re-enable Admin queue interrupt cause */
1851 i40evf_misc_irq_enable(adapter);
5eae00c5
GR		 1852}
1853
1854/**
1855 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1856 * @adapter: board private structure
1857 *
1858 * Free all transmit software resources
1859 **/
e284fc88 1860void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
5eae00c5
GR		 1861{
1862 int i;
1863
cc052927 1864 for (i = 0; i < adapter->num_active_queues; i++)
5eae00c5
GR		 1865 if (adapter->tx_rings[i]->desc)
1866 i40evf_free_tx_resources(adapter->tx_rings[i]);
5eae00c5
GR		 1867}
1868
1869/**
1870 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1871 * @adapter: board private structure
1872 *
1873 * If this function returns with an error, then it's possible one or
1874 * more of the rings is populated (while the rest are not). It is the
1875 * callers duty to clean those orphaned rings.
1876 *
1877 * Return 0 on success, negative on failure
1878 **/
1879static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1880{
1881 int i, err = 0;
1882
cc052927 1883 for (i = 0; i < adapter->num_active_queues; i++) {
d732a184 1884 adapter->tx_rings[i]->count = adapter->tx_desc_count;
5eae00c5
GR		 1885 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1886 if (!err)
1887 continue;
1888 dev_err(&adapter->pdev->dev,
fb43201f 1889 "Allocation for Tx Queue %u failed\n", i);
5eae00c5
GR		 1890 break;
1891 }
1892
1893 return err;
1894}
1895
1896/**
1897 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1898 * @adapter: board private structure
1899 *
1900 * If this function returns with an error, then it's possible one or
1901 * more of the rings is populated (while the rest are not). It is the
1902 * callers duty to clean those orphaned rings.
1903 *
1904 * Return 0 on success, negative on failure
1905 **/
1906static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1907{
1908 int i, err = 0;
1909
cc052927 1910 for (i = 0; i < adapter->num_active_queues; i++) {
d732a184 1911 adapter->rx_rings[i]->count = adapter->rx_desc_count;
5eae00c5
GR		 1912 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1913 if (!err)
1914 continue;
1915 dev_err(&adapter->pdev->dev,
fb43201f 1916 "Allocation for Rx Queue %u failed\n", i);
5eae00c5
GR		 1917 break;
1918 }
1919 return err;
1920}
1921
1922/**
1923 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1924 * @adapter: board private structure
1925 *
1926 * Free all receive software resources
1927 **/
e284fc88 1928void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
5eae00c5
GR		 1929{
1930 int i;
1931
cc052927 1932 for (i = 0; i < adapter->num_active_queues; i++)
5eae00c5
GR		 1933 if (adapter->rx_rings[i]->desc)
1934 i40evf_free_rx_resources(adapter->rx_rings[i]);
1935}
1936
1937/**
1938 * i40evf_open - Called when a network interface is made active
1939 * @netdev: network interface device structure
1940 *
1941 * Returns 0 on success, negative value on failure
1942 *
1943 * The open entry point is called when a network interface is made
1944 * active by the system (IFF_UP). At this point all resources needed
1945 * for transmit and receive operations are allocated, the interrupt
1946 * handler is registered with the OS, the watchdog timer is started,
1947 * and the stack is notified that the interface is ready.
1948 **/
1949static int i40evf_open(struct net_device *netdev)
1950{
1951 struct i40evf_adapter *adapter = netdev_priv(netdev);
1952 int err;
1953
ef8693eb
MW		 1954 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1955 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1956 return -EIO;
1957 }
e284fc88 1958 if (adapter->state != __I40EVF_DOWN || adapter->aq_required)
5eae00c5
GR		 1959 return -EBUSY;
1960
1961 /* allocate transmit descriptors */
1962 err = i40evf_setup_all_tx_resources(adapter);
1963 if (err)
1964 goto err_setup_tx;
1965
1966 /* allocate receive descriptors */
1967 err = i40evf_setup_all_rx_resources(adapter);
1968 if (err)
1969 goto err_setup_rx;
1970
1971 /* clear any pending interrupts, may auto mask */
1972 err = i40evf_request_traffic_irqs(adapter, netdev->name);
1973 if (err)
1974 goto err_req_irq;
1975
44151cd3 1976 i40evf_add_filter(adapter, adapter->hw.mac.addr);
5eae00c5
GR		 1977 i40evf_configure(adapter);
1978
1979 err = i40evf_up_complete(adapter);
1980 if (err)
1981 goto err_req_irq;
1982
1983 i40evf_irq_enable(adapter, true);
1984
1985 return 0;
1986
1987err_req_irq:
1988 i40evf_down(adapter);
1989 i40evf_free_traffic_irqs(adapter);
1990err_setup_rx:
1991 i40evf_free_all_rx_resources(adapter);
1992err_setup_tx:
1993 i40evf_free_all_tx_resources(adapter);
1994
1995 return err;
1996}
1997
1998/**
1999 * i40evf_close - Disables a network interface
2000 * @netdev: network interface device structure
2001 *
2002 * Returns 0, this is not allowed to fail
2003 *
2004 * The close entry point is called when an interface is de-activated
2005 * by the OS. The hardware is still under the drivers control, but
2006 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
2007 * are freed, along with all transmit and receive resources.
2008 **/
2009static int i40evf_close(struct net_device *netdev)
2010{
2011 struct i40evf_adapter *adapter = netdev_priv(netdev);
2012
ef8693eb
MW		 2013 if (adapter->state <= __I40EVF_DOWN)
2014 return 0;
2015
ef8693eb 2016
5eae00c5
GR		 2017 set_bit(__I40E_DOWN, &adapter->vsi.state);
2018
2019 i40evf_down(adapter);
ddf0b3a6 2020 adapter->state = __I40EVF_DOWN;
5eae00c5
GR		 2021 i40evf_free_traffic_irqs(adapter);
2022
5eae00c5
GR		 2023 return 0;
2024}
2025
2026/**
2027 * i40evf_get_stats - Get System Network Statistics
2028 * @netdev: network interface device structure
2029 *
2030 * Returns the address of the device statistics structure.
2031 * The statistics are actually updated from the timer callback.
2032 **/
2033static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
2034{
2035 struct i40evf_adapter *adapter = netdev_priv(netdev);
2036
2037 /* only return the current stats */
2038 return &adapter->net_stats;
2039}
2040
5eae00c5
GR		 2041/**
2042 * i40evf_change_mtu - Change the Maximum Transfer Unit
2043 * @netdev: network interface device structure
2044 * @new_mtu: new value for maximum frame size
2045 *
2046 * Returns 0 on success, negative on failure
2047 **/
2048static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
2049{
2050 struct i40evf_adapter *adapter = netdev_priv(netdev);
2051 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2052
2053 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
2054 return -EINVAL;
2055
5eae00c5 2056 netdev->mtu = new_mtu;
67c818a1
MW		 2057 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
2058 schedule_work(&adapter->reset_task);
2059
5eae00c5
GR		 2060 return 0;
2061}
2062
2063static const struct net_device_ops i40evf_netdev_ops = {
2064 .ndo_open = i40evf_open,
2065 .ndo_stop = i40evf_close,
2066 .ndo_start_xmit = i40evf_xmit_frame,
2067 .ndo_get_stats = i40evf_get_stats,
2068 .ndo_set_rx_mode = i40evf_set_rx_mode,
2069 .ndo_validate_addr = eth_validate_addr,
2070 .ndo_set_mac_address = i40evf_set_mac,
2071 .ndo_change_mtu = i40evf_change_mtu,
2072 .ndo_tx_timeout = i40evf_tx_timeout,
2073 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
2074 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
7709b4c1
AD		 2075#ifdef CONFIG_NET_POLL_CONTROLLER
2076 .ndo_poll_controller = i40evf_netpoll,
2077#endif
5eae00c5
GR		 2078};
2079
2080/**
2081 * i40evf_check_reset_complete - check that VF reset is complete
2082 * @hw: pointer to hw struct
2083 *
2084 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
2085 **/
2086static int i40evf_check_reset_complete(struct i40e_hw *hw)
2087{
2088 u32 rstat;
2089 int i;
2090
2091 for (i = 0; i < 100; i++) {
fd35886a
AS		 2092 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
2093 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
2094 if ((rstat == I40E_VFR_VFACTIVE) ||
2095 (rstat == I40E_VFR_COMPLETED))
5eae00c5 2096 return 0;
f98a2006 2097 usleep_range(10, 20);
5eae00c5
GR		 2098 }
2099 return -EBUSY;
2100}
2101
e6d038de
MW		 2102/**
2103 * i40evf_process_config - Process the config information we got from the PF
2104 * @adapter: board private structure
2105 *
2106 * Verify that we have a valid config struct, and set up our netdev features
2107 * and our VSI struct.
2108 **/
2109int i40evf_process_config(struct i40evf_adapter *adapter)
2110{
2111 struct net_device *netdev = adapter->netdev;
2112 int i;
2113
2114 /* got VF config message back from PF, now we can parse it */
2115 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2116 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2117 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2118 }
2119 if (!adapter->vsi_res) {
2120 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
2121 return -ENODEV;
2122 }
2123
2124 if (adapter->vf_res->vf_offload_flags
2125 & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2126 netdev->vlan_features = netdev->features;
2127 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2128 NETIF_F_HW_VLAN_CTAG_RX |
2129 NETIF_F_HW_VLAN_CTAG_FILTER;
2130 }
2131 netdev->features |= NETIF_F_HIGHDMA |
2132 NETIF_F_SG |
2133 NETIF_F_IP_CSUM |
2134 NETIF_F_SCTP_CSUM |
2135 NETIF_F_IPV6_CSUM |
2136 NETIF_F_TSO |
2137 NETIF_F_TSO6 |
2138 NETIF_F_RXCSUM |
2139 NETIF_F_GRO;
2140
2141 /* copy netdev features into list of user selectable features */
2142 netdev->hw_features |= netdev->features;
2143 netdev->hw_features &= ~NETIF_F_RXCSUM;
2144
2145 adapter->vsi.id = adapter->vsi_res->vsi_id;
2146
2147 adapter->vsi.back = adapter;
2148 adapter->vsi.base_vector = 1;
2149 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2150 adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2151 ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2152 adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2153 ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2154 adapter->vsi.netdev = adapter->netdev;
f578f5f4 2155 adapter->vsi.qs_handle = adapter->vsi_res->qset_handle;
e6d038de
MW		 2156 return 0;
2157}
2158
5eae00c5
GR		 2159/**
2160 * i40evf_init_task - worker thread to perform delayed initialization
2161 * @work: pointer to work_struct containing our data
2162 *
2163 * This task completes the work that was begun in probe. Due to the nature
2164 * of VF-PF communications, we may need to wait tens of milliseconds to get
dbedd44e 2165 * responses back from the PF. Rather than busy-wait in probe and bog down the
5eae00c5
GR		 2166 * whole system, we'll do it in a task so we can sleep.
2167 * This task only runs during driver init. Once we've established
2168 * communications with the PF driver and set up our netdev, the watchdog
2169 * takes over.
2170 **/
2171static void i40evf_init_task(struct work_struct *work)
2172{
2173 struct i40evf_adapter *adapter = container_of(work,
2174 struct i40evf_adapter,
2175 init_task.work);
2176 struct net_device *netdev = adapter->netdev;
5eae00c5
GR		 2177 struct i40e_hw *hw = &adapter->hw;
2178 struct pci_dev *pdev = adapter->pdev;
e6d038de 2179 int err, bufsz;
5eae00c5
GR		 2180
2181 switch (adapter->state) {
2182 case __I40EVF_STARTUP:
2183 /* driver loaded, probe complete */
ef8693eb
MW		 2184 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2185 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
5eae00c5
GR		 2186 err = i40e_set_mac_type(hw);
2187 if (err) {
c2a137cb
MW		 2188 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2189 err);
2619ef47 2190 goto err;
5eae00c5
GR		 2191 }
2192 err = i40evf_check_reset_complete(hw);
2193 if (err) {
0d9c7ea8 2194 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
75a64435 2195 err);
5eae00c5
GR		 2196 goto err;
2197 }
2198 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2199 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2200 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2201 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2202
2203 err = i40evf_init_adminq(hw);
2204 if (err) {
c2a137cb
MW		 2205 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2206 err);
5eae00c5
GR		 2207 goto err;
2208 }
2209 err = i40evf_send_api_ver(adapter);
2210 if (err) {
10bdd67b 2211 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
5eae00c5
GR		 2212 i40evf_shutdown_adminq(hw);
2213 goto err;
2214 }
2215 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2216 goto restart;
5eae00c5 2217 case __I40EVF_INIT_VERSION_CHECK:
10bdd67b 2218 if (!i40evf_asq_done(hw)) {
80e72893 2219 dev_err(&pdev->dev, "Admin queue command never completed\n");
906a6937
MW		 2220 i40evf_shutdown_adminq(hw);
2221 adapter->state = __I40EVF_STARTUP;
5eae00c5 2222 goto err;
10bdd67b 2223 }
5eae00c5
GR		 2224
2225 /* aq msg sent, awaiting reply */
2226 err = i40evf_verify_api_ver(adapter);
2227 if (err) {
d4f82fd3 2228 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
56f9920a 2229 err = i40evf_send_api_ver(adapter);
ee1693e5
MW		 2230 else
2231 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
2232 adapter->pf_version.major,
2233 adapter->pf_version.minor,
2234 I40E_VIRTCHNL_VERSION_MAJOR,
2235 I40E_VIRTCHNL_VERSION_MINOR);
5eae00c5
GR		 2236 goto err;
2237 }
2238 err = i40evf_send_vf_config_msg(adapter);
2239 if (err) {
3f2ab172 2240 dev_err(&pdev->dev, "Unable to send config request (%d)\n",
5eae00c5
GR		 2241 err);
2242 goto err;
2243 }
2244 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2245 goto restart;
5eae00c5
GR		 2246 case __I40EVF_INIT_GET_RESOURCES:
2247 /* aq msg sent, awaiting reply */
2248 if (!adapter->vf_res) {
2249 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2250 (I40E_MAX_VF_VSI *
2251 sizeof(struct i40e_virtchnl_vsi_resource));
2252 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
c2a137cb 2253 if (!adapter->vf_res)
5eae00c5 2254 goto err;
5eae00c5
GR		 2255 }
2256 err = i40evf_get_vf_config(adapter);
906a6937 2257 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
906a6937
MW		 2258 err = i40evf_send_vf_config_msg(adapter);
2259 goto err;
2260 }
5eae00c5 2261 if (err) {
c2a137cb
MW		 2262 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2263 err);
5eae00c5
GR		 2264 goto err_alloc;
2265 }
2266 adapter->state = __I40EVF_INIT_SW;
2267 break;
2268 default:
2269 goto err_alloc;
2270 }
e6d038de 2271 if (i40evf_process_config(adapter))
5eae00c5 2272 goto err_alloc;
e6d038de 2273 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 2274
2275 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2276
5eae00c5
GR		 2277 netdev->netdev_ops = &i40evf_netdev_ops;
2278 i40evf_set_ethtool_ops(netdev);
2279 netdev->watchdog_timeo = 5 * HZ;
3415e8ce 2280
5eae00c5 2281 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
b34f90e7 2282 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
c2a137cb 2283 adapter->hw.mac.addr);
14e52ee2
MW		 2284 eth_hw_addr_random(netdev);
2285 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
2286 } else {
2287 adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF;
2288 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2289 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
5eae00c5 2290 }
5eae00c5 2291
5eae00c5
GR		 2292 init_timer(&adapter->watchdog_timer);
2293 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2294 adapter->watchdog_timer.data = (unsigned long)adapter;
2295 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2296
cc052927
MW		 2297 adapter->num_active_queues = min_t(int,
2298 adapter->vsi_res->num_queue_pairs,
2299 (int)(num_online_cpus()));
d732a184
MW		 2300 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2301 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
5eae00c5
GR		 2302 err = i40evf_init_interrupt_scheme(adapter);
2303 if (err)
2304 goto err_sw_init;
2305 i40evf_map_rings_to_vectors(adapter);
1f012279
ASJ		 2306 if (adapter->vf_res->vf_offload_flags &
2307 I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
2308 adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
e25d00b8
ASJ		 2309 if (!RSS_AQ(adapter))
2310 i40evf_configure_rss(adapter);
5eae00c5
GR		 2311 err = i40evf_request_misc_irq(adapter);
2312 if (err)
2313 goto err_sw_init;
2314
2315 netif_carrier_off(netdev);
2316
ef8693eb
MW		 2317 if (!adapter->netdev_registered) {
2318 err = register_netdev(netdev);
2319 if (err)
2320 goto err_register;
2321 }
5eae00c5
GR		 2322
2323 adapter->netdev_registered = true;
2324
2325 netif_tx_stop_all_queues(netdev);
2326
b34f90e7 2327 dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
5eae00c5
GR		 2328 if (netdev->features & NETIF_F_GRO)
2329 dev_info(&pdev->dev, "GRO is enabled\n");
2330
2331 dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2332 adapter->state = __I40EVF_DOWN;
2333 set_bit(__I40E_DOWN, &adapter->vsi.state);
2334 i40evf_misc_irq_enable(adapter);
e25d00b8
ASJ		 2335
2336 if (RSS_AQ(adapter)) {
2337 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
2338 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
2339 } else {
2340 i40evf_configure_rss(adapter);
2341 }
5eae00c5
GR		 2342 return;
2343restart:
5be8308b 2344 schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(20));
5eae00c5
GR		 2345 return;
2346
2347err_register:
2348 i40evf_free_misc_irq(adapter);
2349err_sw_init:
2350 i40evf_reset_interrupt_capability(adapter);
5eae00c5
GR		 2351err_alloc:
2352 kfree(adapter->vf_res);
2353 adapter->vf_res = NULL;
2354err:
2355 /* Things went into the weeds, so try again later */
2356 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
80e72893 2357 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
ef8693eb 2358 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
5eae00c5
GR		 2359 return; /* do not reschedule */
2360 }
5be8308b 2361 schedule_delayed_work(&adapter->init_task, HZ / 2);
5eae00c5
GR		 2362}
2363
2364/**
2365 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2366 * @pdev: pci device structure
2367 **/
2368static void i40evf_shutdown(struct pci_dev *pdev)
2369{
2370 struct net_device *netdev = pci_get_drvdata(pdev);
00293fdc 2371 struct i40evf_adapter *adapter = netdev_priv(netdev);
5eae00c5
GR		 2372
2373 netif_device_detach(netdev);
2374
2375 if (netif_running(netdev))
2376 i40evf_close(netdev);
2377
00293fdc
MW		 2378 /* Prevent the watchdog from running. */
2379 adapter->state = __I40EVF_REMOVE;
2380 adapter->aq_required = 0;
00293fdc 2381
5eae00c5
GR		 2382#ifdef CONFIG_PM
2383 pci_save_state(pdev);
2384
2385#endif
2386 pci_disable_device(pdev);
2387}
2388
2389/**
2390 * i40evf_probe - Device Initialization Routine
2391 * @pdev: PCI device information struct
2392 * @ent: entry in i40evf_pci_tbl
2393 *
2394 * Returns 0 on success, negative on failure
2395 *
2396 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2397 * The OS initialization, configuring of the adapter private structure,
2398 * and a hardware reset occur.
2399 **/
2400static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2401{
2402 struct net_device *netdev;
2403 struct i40evf_adapter *adapter = NULL;
2404 struct i40e_hw *hw = NULL;
dbbd8111 2405 int err;
5eae00c5
GR		 2406
2407 err = pci_enable_device(pdev);
2408 if (err)
2409 return err;
2410
6494294f 2411 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
6494294f 2412 if (err) {
e3e3bfdd
JS		 2413 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2414 if (err) {
2415 dev_err(&pdev->dev,
2416 "DMA configuration failed: 0x%x\n", err);
2417 goto err_dma;
2418 }
5eae00c5
GR		 2419 }
2420
2421 err = pci_request_regions(pdev, i40evf_driver_name);
2422 if (err) {
2423 dev_err(&pdev->dev,
2424 "pci_request_regions failed 0x%x\n", err);
2425 goto err_pci_reg;
2426 }
2427
2428 pci_enable_pcie_error_reporting(pdev);
2429
2430 pci_set_master(pdev);
2431
2432 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2433 MAX_TX_QUEUES);
2434 if (!netdev) {
2435 err = -ENOMEM;
2436 goto err_alloc_etherdev;
2437 }
2438
2439 SET_NETDEV_DEV(netdev, &pdev->dev);
2440
2441 pci_set_drvdata(pdev, netdev);
2442 adapter = netdev_priv(netdev);
5eae00c5
GR		 2443
2444 adapter->netdev = netdev;
2445 adapter->pdev = pdev;
2446
2447 hw = &adapter->hw;
2448 hw->back = adapter;
2449
41a1d04b 2450 adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
5eae00c5
GR		 2451 adapter->state = __I40EVF_STARTUP;
2452
2453 /* Call save state here because it relies on the adapter struct. */
2454 pci_save_state(pdev);
2455
2456 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2457 pci_resource_len(pdev, 0));
2458 if (!hw->hw_addr) {
2459 err = -EIO;
2460 goto err_ioremap;
2461 }
2462 hw->vendor_id = pdev->vendor;
2463 hw->device_id = pdev->device;
2464 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2465 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2466 hw->subsystem_device_id = pdev->subsystem_device;
2467 hw->bus.device = PCI_SLOT(pdev->devfn);
2468 hw->bus.func = PCI_FUNC(pdev->devfn);
2469
8bb1a540
SK		 2470 INIT_LIST_HEAD(&adapter->mac_filter_list);
2471 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2472
5eae00c5
GR		 2473 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2474 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2475 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2476 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
9b32b0b5
MW		 2477 schedule_delayed_work(&adapter->init_task,
2478 msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
5eae00c5
GR		 2479
2480 return 0;
2481
2482err_ioremap:
2483 free_netdev(netdev);
2484err_alloc_etherdev:
2485 pci_release_regions(pdev);
2486err_pci_reg:
2487err_dma:
2488 pci_disable_device(pdev);
2489 return err;
2490}
2491
2492#ifdef CONFIG_PM
2493/**
2494 * i40evf_suspend - Power management suspend routine
2495 * @pdev: PCI device information struct
2496 * @state: unused
2497 *
2498 * Called when the system (VM) is entering sleep/suspend.
2499 **/
2500static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2501{
2502 struct net_device *netdev = pci_get_drvdata(pdev);
2503 struct i40evf_adapter *adapter = netdev_priv(netdev);
2504 int retval = 0;
2505
2506 netif_device_detach(netdev);
2507
2508 if (netif_running(netdev)) {
2509 rtnl_lock();
2510 i40evf_down(adapter);
2511 rtnl_unlock();
2512 }
2513 i40evf_free_misc_irq(adapter);
2514 i40evf_reset_interrupt_capability(adapter);
2515
2516 retval = pci_save_state(pdev);
2517 if (retval)
2518 return retval;
2519
2520 pci_disable_device(pdev);
2521
2522 return 0;
2523}
2524
2525/**
dbedd44e 2526 * i40evf_resume - Power management resume routine
5eae00c5
GR		 2527 * @pdev: PCI device information struct
2528 *
2529 * Called when the system (VM) is resumed from sleep/suspend.
2530 **/
2531static int i40evf_resume(struct pci_dev *pdev)
2532{
2533 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2534 struct net_device *netdev = adapter->netdev;
2535 u32 err;
2536
2537 pci_set_power_state(pdev, PCI_D0);
2538 pci_restore_state(pdev);
2539 /* pci_restore_state clears dev->state_saved so call
2540 * pci_save_state to restore it.
2541 */
2542 pci_save_state(pdev);
2543
2544 err = pci_enable_device_mem(pdev);
2545 if (err) {
2546 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2547 return err;
2548 }
2549 pci_set_master(pdev);
2550
2551 rtnl_lock();
2552 err = i40evf_set_interrupt_capability(adapter);
2553 if (err) {
f2a1c368 2554 rtnl_unlock();
5eae00c5
GR		 2555 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2556 return err;
2557 }
2558 err = i40evf_request_misc_irq(adapter);
2559 rtnl_unlock();
2560 if (err) {
2561 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2562 return err;
2563 }
2564
2565 schedule_work(&adapter->reset_task);
2566
2567 netif_device_attach(netdev);
2568
2569 return err;
2570}
2571
2572#endif /* CONFIG_PM */
2573/**
2574 * i40evf_remove - Device Removal Routine
2575 * @pdev: PCI device information struct
2576 *
2577 * i40evf_remove is called by the PCI subsystem to alert the driver
2578 * that it should release a PCI device. The could be caused by a
2579 * Hot-Plug event, or because the driver is going to be removed from
2580 * memory.
2581 **/
2582static void i40evf_remove(struct pci_dev *pdev)
2583{
2584 struct net_device *netdev = pci_get_drvdata(pdev);
2585 struct i40evf_adapter *adapter = netdev_priv(netdev);
6ba36a24 2586 struct i40evf_mac_filter *f, *ftmp;
5eae00c5
GR		 2587 struct i40e_hw *hw = &adapter->hw;
2588
2589 cancel_delayed_work_sync(&adapter->init_task);
ef8693eb 2590 cancel_work_sync(&adapter->reset_task);
5eae00c5
GR		 2591
2592 if (adapter->netdev_registered) {
2593 unregister_netdev(netdev);
2594 adapter->netdev_registered = false;
2595 }
53d0b3ae 2596
f4a71881 2597 /* Shut down all the garbage mashers on the detention level */
5eae00c5 2598 adapter->state = __I40EVF_REMOVE;
f4a71881 2599 adapter->aq_required = 0;
f4a71881
MW		 2600 i40evf_request_reset(adapter);
2601 msleep(20);
2602 /* If the FW isn't responding, kick it once, but only once. */
2603 if (!i40evf_asq_done(hw)) {
2604 i40evf_request_reset(adapter);
2605 msleep(20);
2606 }
5eae00c5 2607
dbb01c8a 2608 if (adapter->msix_entries) {
5eae00c5 2609 i40evf_misc_irq_disable(adapter);
5eae00c5 2610 i40evf_free_misc_irq(adapter);
5eae00c5 2611 i40evf_reset_interrupt_capability(adapter);
d31944d6 2612 i40evf_free_q_vectors(adapter);
5eae00c5
GR		 2613 }
2614
e5d17c3e
MW		 2615 if (adapter->watchdog_timer.function)
2616 del_timer_sync(&adapter->watchdog_timer);
2617
dbb01c8a
MW		 2618 flush_scheduled_work();
2619
5eae00c5
GR		 2620 if (hw->aq.asq.count)
2621 i40evf_shutdown_adminq(hw);
2622
2623 iounmap(hw->hw_addr);
2624 pci_release_regions(pdev);
2625
e284fc88
MW		 2626 i40evf_free_all_tx_resources(adapter);
2627 i40evf_free_all_rx_resources(adapter);
5eae00c5
GR		 2628 i40evf_free_queues(adapter);
2629 kfree(adapter->vf_res);
6ba36a24
MW		 2630 /* If we got removed before an up/down sequence, we've got a filter
2631 * hanging out there that we need to get rid of.
2632 */
2633 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2634 list_del(&f->list);
2635 kfree(f);
2636 }
37dfdf37
MW		 2637 list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2638 list_del(&f->list);
2639 kfree(f);
2640 }
5eae00c5
GR		 2641
2642 free_netdev(netdev);
2643
2644 pci_disable_pcie_error_reporting(pdev);
2645
2646 pci_disable_device(pdev);
2647}
2648
2649static struct pci_driver i40evf_driver = {
2650 .name = i40evf_driver_name,
2651 .id_table = i40evf_pci_tbl,
2652 .probe = i40evf_probe,
2653 .remove = i40evf_remove,
2654#ifdef CONFIG_PM
2655 .suspend = i40evf_suspend,
2656 .resume = i40evf_resume,
2657#endif
2658 .shutdown = i40evf_shutdown,
2659};
2660
2661/**
2662 * i40e_init_module - Driver Registration Routine
2663 *
2664 * i40e_init_module is the first routine called when the driver is
2665 * loaded. All it does is register with the PCI subsystem.
2666 **/
2667static int __init i40evf_init_module(void)
2668{
2669 int ret;
75a64435 2670
5eae00c5 2671 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
75a64435 2672 i40evf_driver_version);
5eae00c5
GR		 2673
2674 pr_info("%s\n", i40evf_copyright);
2675
2676 ret = pci_register_driver(&i40evf_driver);
2677 return ret;
2678}
2679
2680module_init(i40evf_init_module);
2681
2682/**
2683 * i40e_exit_module - Driver Exit Cleanup Routine
2684 *
2685 * i40e_exit_module is called just before the driver is removed
2686 * from memory.
2687 **/
2688static void __exit i40evf_exit_module(void)
2689{
2690 pci_unregister_driver(&i40evf_driver);
2691}
2692
2693module_exit(i40evf_exit_module);
2694
2695/* i40evf_main.c */
Linux kernel - Deliverables
This page took 0.290584 seconds and 5 git commands to generate.