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i40e/i40evf: prefetch skb data on transmit
[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
ASJ		 1213/**
1214 * i40e_configure_rss_aq - Prepare for RSS using AQ commands
1215 * @vsi: vsi structure
1216 * @seed: RSS hash seed
1217 **/
1218static void i40evf_configure_rss_aq(struct i40e_vsi *vsi, const u8 *seed)
1219{
1220 struct i40e_aqc_get_set_rss_key_data rss_key;
1221 struct i40evf_adapter *adapter = vsi->back;
1222 struct i40e_hw *hw = &adapter->hw;
1223 int ret = 0, i;
1224 u8 *rss_lut;
1225
1226 if (!vsi->id)
1227 return;
1228
1229 if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
1230 /* bail because we already have a command pending */
1231 dev_err(&adapter->pdev->dev, "Cannot confiure RSS, command %d pending\n",
1232 adapter->current_op);
1233 return;
1234 }
1235
1236 memset(&rss_key, 0, sizeof(rss_key));
1237 memcpy(&rss_key, seed, sizeof(rss_key));
1238
1239 rss_lut = kzalloc(((I40E_VFQF_HLUT_MAX_INDEX + 1) * 4), GFP_KERNEL);
1240 if (!rss_lut)
1241 return;
1242
1243 /* Populate the LUT with max no. PF queues in round robin fashion */
1244 for (i = 0; i <= (I40E_VFQF_HLUT_MAX_INDEX * 4); i++)
1245 rss_lut[i] = i % adapter->num_active_queues;
1246
1247 ret = i40evf_aq_set_rss_key(hw, vsi->id, &rss_key);
1248 if (ret) {
1249 dev_err(&adapter->pdev->dev,
1250 "Cannot set RSS key, err %s aq_err %s\n",
1251 i40evf_stat_str(hw, ret),
1252 i40evf_aq_str(hw, hw->aq.asq_last_status));
1253 return;
1254 }
1255
1256 ret = i40evf_aq_set_rss_lut(hw, vsi->id, false, rss_lut,
1257 (I40E_VFQF_HLUT_MAX_INDEX + 1) * 4);
1258 if (ret)
1259 dev_err(&adapter->pdev->dev,
1260 "Cannot set RSS lut, err %s aq_err %s\n",
1261 i40evf_stat_str(hw, ret),
1262 i40evf_aq_str(hw, hw->aq.asq_last_status));
1263}
1264
1265/**
1266 * i40e_configure_rss_reg - Prepare for RSS if used
1267 * @adapter: board private structure
1268 * @seed: RSS hash seed
1269 **/
1270static void i40evf_configure_rss_reg(struct i40evf_adapter *adapter,
1271 const u8 *seed)
1272{
1273 struct i40e_hw *hw = &adapter->hw;
1274 u32 *seed_dw = (u32 *)seed;
1275 u32 cqueue = 0;
1276 u32 lut = 0;
1277 int i, j;
1278
1279 /* Fill out hash function seed */
1280 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1281 wr32(hw, I40E_VFQF_HKEY(i), seed_dw[i]);
1282
1283 /* Populate the LUT with max no. PF queues in round robin fashion */
1284 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
1285 lut = 0;
1286 for (j = 0; j < 4; j++) {
1287 if (cqueue == adapter->num_active_queues)
1288 cqueue = 0;
1289 lut |= ((cqueue) << (8 * j));
1290 cqueue++;
1291 }
1292 wr32(hw, I40E_VFQF_HLUT(i), lut);
1293 }
1294 i40e_flush(hw);
1295}
1296
1297/**
1298 * i40evf_configure_rss - Prepare for RSS
1299 * @adapter: board private structure
1300 **/
1301static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1302{
1303 struct i40e_hw *hw = &adapter->hw;
1304 u8 seed[I40EVF_HKEY_ARRAY_SIZE];
1305 u64 hena;
1306
1307 netdev_rss_key_fill((void *)seed, I40EVF_HKEY_ARRAY_SIZE);
1308
1309 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1310 hena = I40E_DEFAULT_RSS_HENA;
1311 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1312 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1313
1314 if (RSS_AQ(adapter))
1315 i40evf_configure_rss_aq(&adapter->vsi, seed);
1316 else
1317 i40evf_configure_rss_reg(adapter, seed);
1318}
1319
5eae00c5
GR		 1320/**
1321 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1322 * @adapter: board private structure to initialize
1323 *
1324 * We allocate one q_vector per queue interrupt. If allocation fails we
1325 * return -ENOMEM.
1326 **/
1327static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1328{
1329 int q_idx, num_q_vectors;
1330 struct i40e_q_vector *q_vector;
1331
1332 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1333
1334 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
75a64435 1335 q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL);
5eae00c5
GR		 1336 if (!q_vector)
1337 goto err_out;
1338 q_vector->adapter = adapter;
1339 q_vector->vsi = &adapter->vsi;
1340 q_vector->v_idx = q_idx;
1341 netif_napi_add(adapter->netdev, &q_vector->napi,
75a64435 1342 i40evf_napi_poll, NAPI_POLL_WEIGHT);
5eae00c5
GR		 1343 adapter->q_vector[q_idx] = q_vector;
1344 }
1345
1346 return 0;
1347
1348err_out:
1349 while (q_idx) {
1350 q_idx--;
1351 q_vector = adapter->q_vector[q_idx];
1352 netif_napi_del(&q_vector->napi);
1353 kfree(q_vector);
1354 adapter->q_vector[q_idx] = NULL;
1355 }
1356 return -ENOMEM;
1357}
1358
1359/**
1360 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1361 * @adapter: board private structure to initialize
1362 *
1363 * This function frees the memory allocated to the q_vectors. In addition if
1364 * NAPI is enabled it will delete any references to the NAPI struct prior
1365 * to freeing the q_vector.
1366 **/
1367static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1368{
1369 int q_idx, num_q_vectors;
1370 int napi_vectors;
1371
1372 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
cc052927 1373 napi_vectors = adapter->num_active_queues;
5eae00c5
GR		 1374
1375 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1376 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1377
1378 adapter->q_vector[q_idx] = NULL;
1379 if (q_idx < napi_vectors)
1380 netif_napi_del(&q_vector->napi);
1381 kfree(q_vector);
1382 }
1383}
1384
1385/**
1386 * i40evf_reset_interrupt_capability - Reset MSIX setup
1387 * @adapter: board private structure
1388 *
1389 **/
1390void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1391{
1392 pci_disable_msix(adapter->pdev);
1393 kfree(adapter->msix_entries);
1394 adapter->msix_entries = NULL;
5eae00c5
GR		 1395}
1396
1397/**
1398 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1399 * @adapter: board private structure to initialize
1400 *
1401 **/
1402int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1403{
1404 int err;
1405
1406 err = i40evf_set_interrupt_capability(adapter);
1407 if (err) {
1408 dev_err(&adapter->pdev->dev,
1409 "Unable to setup interrupt capabilities\n");
1410 goto err_set_interrupt;
1411 }
1412
1413 err = i40evf_alloc_q_vectors(adapter);
1414 if (err) {
1415 dev_err(&adapter->pdev->dev,
1416 "Unable to allocate memory for queue vectors\n");
1417 goto err_alloc_q_vectors;
1418 }
1419
1420 err = i40evf_alloc_queues(adapter);
1421 if (err) {
1422 dev_err(&adapter->pdev->dev,
1423 "Unable to allocate memory for queues\n");
1424 goto err_alloc_queues;
1425 }
1426
1427 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
75a64435
MW		 1428 (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1429 adapter->num_active_queues);
5eae00c5
GR		 1430
1431 return 0;
1432err_alloc_queues:
1433 i40evf_free_q_vectors(adapter);
1434err_alloc_q_vectors:
1435 i40evf_reset_interrupt_capability(adapter);
1436err_set_interrupt:
1437 return err;
1438}
1439
1440/**
1441 * i40evf_watchdog_timer - Periodic call-back timer
1442 * @data: pointer to adapter disguised as unsigned long
1443 **/
1444static void i40evf_watchdog_timer(unsigned long data)
1445{
1446 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
75a64435 1447
5eae00c5
GR		 1448 schedule_work(&adapter->watchdog_task);
1449 /* timer will be rescheduled in watchdog task */
1450}
1451
1452/**
1453 * i40evf_watchdog_task - Periodic call-back task
1454 * @work: pointer to work_struct
1455 **/
1456static void i40evf_watchdog_task(struct work_struct *work)
1457{
1458 struct i40evf_adapter *adapter = container_of(work,
75a64435
MW		 1459 struct i40evf_adapter,
1460 watchdog_task);
5eae00c5 1461 struct i40e_hw *hw = &adapter->hw;
ee5c1e92 1462 u32 reg_val;
5eae00c5 1463
ef8693eb
MW		 1464 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1465 goto restart_watchdog;
1466
1467 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
ee5c1e92
MW		 1468 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1469 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1470 if ((reg_val == I40E_VFR_VFACTIVE) ||
1471 (reg_val == I40E_VFR_COMPLETED)) {
ef8693eb
MW		 1472 /* A chance for redemption! */
1473 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1474 adapter->state = __I40EVF_STARTUP;
1475 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1476 schedule_delayed_work(&adapter->init_task, 10);
1477 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1478 &adapter->crit_section);
1479 /* Don't reschedule the watchdog, since we've restarted
1480 * the init task. When init_task contacts the PF and
1481 * gets everything set up again, it'll restart the
1482 * watchdog for us. Down, boy. Sit. Stay. Woof.
1483 */
1484 return;
1485 }
ef8693eb
MW		 1486 adapter->aq_required = 0;
1487 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5 1488 goto watchdog_done;
ef8693eb 1489 }
5eae00c5 1490
ef8693eb
MW		 1491 if ((adapter->state < __I40EVF_DOWN) ||
1492 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
5eae00c5
GR		 1493 goto watchdog_done;
1494
ef8693eb 1495 /* check for reset */
ee5c1e92
MW		 1496 reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
1497 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
5eae00c5 1498 adapter->state = __I40EVF_RESETTING;
ef8693eb 1499 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
249c8b8d 1500 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
5eae00c5 1501 schedule_work(&adapter->reset_task);
ef8693eb
MW		 1502 adapter->aq_required = 0;
1503 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 1504 goto watchdog_done;
1505 }
1506
1507 /* Process admin queue tasks. After init, everything gets done
1508 * here so we don't race on the admin queue.
1509 */
ed636960 1510 if (adapter->current_op) {
0758e7cb
MW		 1511 if (!i40evf_asq_done(hw)) {
1512 dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1513 i40evf_send_api_ver(adapter);
1514 }
5eae00c5 1515 goto watchdog_done;
0758e7cb 1516 }
e6d038de
MW		 1517 if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
1518 i40evf_send_vf_config_msg(adapter);
1519 goto watchdog_done;
1520 }
5eae00c5 1521
e284fc88
MW		 1522 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1523 i40evf_disable_queues(adapter);
1524 goto watchdog_done;
1525 }
1526
5eae00c5
GR		 1527 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1528 i40evf_map_queues(adapter);
1529 goto watchdog_done;
1530 }
1531
1532 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1533 i40evf_add_ether_addrs(adapter);
1534 goto watchdog_done;
1535 }
1536
1537 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1538 i40evf_add_vlans(adapter);
1539 goto watchdog_done;
1540 }
1541
1542 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1543 i40evf_del_ether_addrs(adapter);
1544 goto watchdog_done;
1545 }
1546
1547 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1548 i40evf_del_vlans(adapter);
1549 goto watchdog_done;
1550 }
1551
5eae00c5
GR		 1552 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1553 i40evf_configure_queues(adapter);
1554 goto watchdog_done;
1555 }
1556
1557 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1558 i40evf_enable_queues(adapter);
1559 goto watchdog_done;
1560 }
1561
e25d00b8
ASJ		 1562 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
1563 /* This message goes straight to the firmware, not the
1564 * PF, so we don't have to set current_op as we will
1565 * not get a response through the ARQ.
1566 */
1567 i40evf_configure_rss(adapter);
1568 adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
1569 goto watchdog_done;
1570 }
1571
5eae00c5
GR		 1572 if (adapter->state == __I40EVF_RUNNING)
1573 i40evf_request_stats(adapter);
5eae00c5 1574watchdog_done:
4870e176
MW		 1575 if (adapter->state == __I40EVF_RUNNING) {
1576 i40evf_irq_enable_queues(adapter, ~0);
1577 i40evf_fire_sw_int(adapter, 0xFF);
1578 } else {
1579 i40evf_fire_sw_int(adapter, 0x1);
1580 }
1581
ef8693eb
MW		 1582 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1583restart_watchdog:
d3e2edb7
AS		 1584 if (adapter->state == __I40EVF_REMOVE)
1585 return;
5eae00c5
GR		 1586 if (adapter->aq_required)
1587 mod_timer(&adapter->watchdog_timer,
1588 jiffies + msecs_to_jiffies(20));
1589 else
1590 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
5eae00c5
GR		 1591 schedule_work(&adapter->adminq_task);
1592}
1593
67c818a1
MW		 1594#define I40EVF_RESET_WAIT_MS 10
1595#define I40EVF_RESET_WAIT_COUNT 500
5eae00c5
GR		 1596/**
1597 * i40evf_reset_task - Call-back task to handle hardware reset
1598 * @work: pointer to work_struct
1599 *
1600 * During reset we need to shut down and reinitialize the admin queue
1601 * before we can use it to communicate with the PF again. We also clear
1602 * and reinit the rings because that context is lost as well.
1603 **/
1604static void i40evf_reset_task(struct work_struct *work)
1605{
ef8693eb
MW		 1606 struct i40evf_adapter *adapter = container_of(work,
1607 struct i40evf_adapter,
1608 reset_task);
ac833bbf 1609 struct net_device *netdev = adapter->netdev;
5eae00c5 1610 struct i40e_hw *hw = &adapter->hw;
40d01366 1611 struct i40evf_vlan_filter *vlf;
ac833bbf 1612 struct i40evf_mac_filter *f;
ee5c1e92 1613 u32 reg_val;
ac833bbf 1614 int i = 0, err;
5eae00c5
GR		 1615
1616 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1617 &adapter->crit_section))
f98a2006 1618 usleep_range(500, 1000);
3526d800 1619
67c818a1 1620 i40evf_misc_irq_disable(adapter);
3526d800 1621 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
67c818a1
MW		 1622 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1623 /* Restart the AQ here. If we have been reset but didn't
1624 * detect it, or if the PF had to reinit, our AQ will be hosed.
1625 */
1626 i40evf_shutdown_adminq(hw);
1627 i40evf_init_adminq(hw);
3526d800
MW		 1628 i40evf_request_reset(adapter);
1629 }
67c818a1 1630 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
3526d800 1631
ef8693eb
MW		 1632 /* poll until we see the reset actually happen */
1633 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
ee5c1e92
MW		 1634 reg_val = rd32(hw, I40E_VF_ARQLEN1) &
1635 I40E_VF_ARQLEN1_ARQENABLE_MASK;
1636 if (!reg_val)
ef8693eb 1637 break;
ee5c1e92 1638 usleep_range(5000, 10000);
ef8693eb
MW		 1639 }
1640 if (i == I40EVF_RESET_WAIT_COUNT) {
67c818a1 1641 dev_info(&adapter->pdev->dev, "Never saw reset\n");
ef8693eb
MW		 1642 goto continue_reset; /* act like the reset happened */
1643 }
5eae00c5 1644
ef8693eb
MW		 1645 /* wait until the reset is complete and the PF is responding to us */
1646 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
ee5c1e92
MW		 1647 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1648 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1649 if (reg_val == I40E_VFR_VFACTIVE)
5eae00c5 1650 break;
c88e38cc 1651 msleep(I40EVF_RESET_WAIT_MS);
5eae00c5 1652 }
67c818a1
MW		 1653 /* extra wait to make sure minimum wait is met */
1654 msleep(I40EVF_RESET_WAIT_MS);
ef8693eb 1655 if (i == I40EVF_RESET_WAIT_COUNT) {
874d1a10 1656 struct i40evf_mac_filter *ftmp;
6ba36a24
MW		 1657 struct i40evf_vlan_filter *fv, *fvtmp;
1658
5eae00c5 1659 /* reset never finished */
80e72893 1660 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
ee5c1e92 1661 reg_val);
ef8693eb
MW		 1662 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1663
169f4076
MW		 1664 if (netif_running(adapter->netdev)) {
1665 set_bit(__I40E_DOWN, &adapter->vsi.state);
ac833bbf 1666 netif_carrier_off(netdev);
67c818a1
MW		 1667 netif_tx_disable(netdev);
1668 i40evf_napi_disable_all(adapter);
1669 i40evf_irq_disable(adapter);
169f4076
MW		 1670 i40evf_free_traffic_irqs(adapter);
1671 i40evf_free_all_tx_resources(adapter);
1672 i40evf_free_all_rx_resources(adapter);
1673 }
6ba36a24
MW		 1674
1675 /* Delete all of the filters, both MAC and VLAN. */
1676 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1677 list) {
1678 list_del(&f->list);
1679 kfree(f);
1680 }
67c818a1 1681
6ba36a24
MW		 1682 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1683 list) {
1684 list_del(&fv->list);
1685 kfree(fv);
1686 }
1687
ef8693eb
MW		 1688 i40evf_free_misc_irq(adapter);
1689 i40evf_reset_interrupt_capability(adapter);
1690 i40evf_free_queues(adapter);
d31944d6 1691 i40evf_free_q_vectors(adapter);
ef8693eb
MW		 1692 kfree(adapter->vf_res);
1693 i40evf_shutdown_adminq(hw);
1694 adapter->netdev->flags &= ~IFF_UP;
1695 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
67c818a1
MW		 1696 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1697 dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
ef8693eb 1698 return; /* Do not attempt to reinit. It's dead, Jim. */
5eae00c5 1699 }
ef8693eb
MW		 1700
1701continue_reset:
3c8e0b98 1702 if (netif_running(adapter->netdev)) {
3c8e0b98 1703 netif_carrier_off(netdev);
67c818a1
MW		 1704 netif_tx_stop_all_queues(netdev);
1705 i40evf_napi_disable_all(adapter);
3c8e0b98 1706 }
67c818a1 1707 i40evf_irq_disable(adapter);
ac833bbf 1708
5eae00c5 1709 adapter->state = __I40EVF_RESETTING;
67c818a1
MW		 1710 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1711
1712 /* free the Tx/Rx rings and descriptors, might be better to just
1713 * re-use them sometime in the future
1714 */
1715 i40evf_free_all_rx_resources(adapter);
1716 i40evf_free_all_tx_resources(adapter);
5eae00c5
GR		 1717
1718 /* kill and reinit the admin queue */
1719 if (i40evf_shutdown_adminq(hw))
ac833bbf
MW		 1720 dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
1721 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 1722 err = i40evf_init_adminq(hw);
1723 if (err)
ac833bbf
MW		 1724 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1725 err);
5eae00c5 1726
e6d038de
MW		 1727 adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG;
1728 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
ac833bbf
MW		 1729
1730 /* re-add all MAC filters */
1731 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1732 f->add = true;
1733 }
1734 /* re-add all VLAN filters */
40d01366
MW		 1735 list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
1736 vlf->add = true;
ac833bbf 1737 }
e6d038de 1738 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
ac833bbf 1739 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
5eae00c5 1740 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
67c818a1 1741 i40evf_misc_irq_enable(adapter);
5eae00c5
GR		 1742
1743 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1744
1745 if (netif_running(adapter->netdev)) {
1746 /* allocate transmit descriptors */
1747 err = i40evf_setup_all_tx_resources(adapter);
1748 if (err)
1749 goto reset_err;
1750
1751 /* allocate receive descriptors */
1752 err = i40evf_setup_all_rx_resources(adapter);
1753 if (err)
1754 goto reset_err;
1755
1756 i40evf_configure(adapter);
1757
1758 err = i40evf_up_complete(adapter);
1759 if (err)
1760 goto reset_err;
1761
1762 i40evf_irq_enable(adapter, true);
67c818a1
MW		 1763 } else {
1764 adapter->state = __I40EVF_DOWN;
5eae00c5 1765 }
67c818a1 1766
5eae00c5
GR		 1767 return;
1768reset_err:
80e72893 1769 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
5eae00c5
GR		 1770 i40evf_close(adapter->netdev);
1771}
1772
1773/**
1774 * i40evf_adminq_task - worker thread to clean the admin queue
1775 * @work: pointer to work_struct containing our data
1776 **/
1777static void i40evf_adminq_task(struct work_struct *work)
1778{
1779 struct i40evf_adapter *adapter =
1780 container_of(work, struct i40evf_adapter, adminq_task);
1781 struct i40e_hw *hw = &adapter->hw;
1782 struct i40e_arq_event_info event;
1783 struct i40e_virtchnl_msg *v_msg;
1784 i40e_status ret;
912257e5 1785 u32 val, oldval;
5eae00c5
GR		 1786 u16 pending;
1787
ef8693eb 1788 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
7235448c 1789 goto out;
ef8693eb 1790
1001dc37
MW		 1791 event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1792 event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
249c8b8d 1793 if (!event.msg_buf)
7235448c 1794 goto out;
249c8b8d 1795
5eae00c5
GR		 1796 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1797 do {
1798 ret = i40evf_clean_arq_element(hw, &event, &pending);
8b011ebb 1799 if (ret || !v_msg->v_opcode)
5eae00c5
GR		 1800 break; /* No event to process or error cleaning ARQ */
1801
1802 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1803 v_msg->v_retval, event.msg_buf,
1001dc37 1804 event.msg_len);
75a64435 1805 if (pending != 0)
5eae00c5 1806 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
5eae00c5
GR		 1807 } while (pending);
1808
67c818a1
MW		 1809 if ((adapter->flags &
1810 (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
1811 adapter->state == __I40EVF_RESETTING)
1812 goto freedom;
1813
912257e5
MW		 1814 /* check for error indications */
1815 val = rd32(hw, hw->aq.arq.len);
1816 oldval = val;
b1f3366b 1817 if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
912257e5 1818 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
b1f3366b 1819 val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
912257e5 1820 }
b1f3366b 1821 if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
912257e5 1822 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
b1f3366b 1823 val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
912257e5 1824 }
b1f3366b 1825 if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
912257e5 1826 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
b1f3366b 1827 val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
912257e5
MW		 1828 }
1829 if (oldval != val)
1830 wr32(hw, hw->aq.arq.len, val);
1831
1832 val = rd32(hw, hw->aq.asq.len);
1833 oldval = val;
b1f3366b 1834 if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
912257e5 1835 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
b1f3366b 1836 val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
912257e5 1837 }
b1f3366b 1838 if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
912257e5 1839 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
b1f3366b 1840 val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
912257e5 1841 }
b1f3366b 1842 if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
912257e5 1843 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
b1f3366b 1844 val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
912257e5
MW		 1845 }
1846 if (oldval != val)
1847 wr32(hw, hw->aq.asq.len, val);
1848
67c818a1 1849freedom:
7235448c
MW		 1850 kfree(event.msg_buf);
1851out:
5eae00c5
GR		 1852 /* re-enable Admin queue interrupt cause */
1853 i40evf_misc_irq_enable(adapter);
5eae00c5
GR		 1854}
1855
1856/**
1857 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1858 * @adapter: board private structure
1859 *
1860 * Free all transmit software resources
1861 **/
e284fc88 1862void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
5eae00c5
GR		 1863{
1864 int i;
1865
cc052927 1866 for (i = 0; i < adapter->num_active_queues; i++)
5eae00c5
GR		 1867 if (adapter->tx_rings[i]->desc)
1868 i40evf_free_tx_resources(adapter->tx_rings[i]);
5eae00c5
GR		 1869}
1870
1871/**
1872 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1873 * @adapter: board private structure
1874 *
1875 * If this function returns with an error, then it's possible one or
1876 * more of the rings is populated (while the rest are not). It is the
1877 * callers duty to clean those orphaned rings.
1878 *
1879 * Return 0 on success, negative on failure
1880 **/
1881static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1882{
1883 int i, err = 0;
1884
cc052927 1885 for (i = 0; i < adapter->num_active_queues; i++) {
d732a184 1886 adapter->tx_rings[i]->count = adapter->tx_desc_count;
5eae00c5
GR		 1887 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1888 if (!err)
1889 continue;
1890 dev_err(&adapter->pdev->dev,
fb43201f 1891 "Allocation for Tx Queue %u failed\n", i);
5eae00c5
GR		 1892 break;
1893 }
1894
1895 return err;
1896}
1897
1898/**
1899 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1900 * @adapter: board private structure
1901 *
1902 * If this function returns with an error, then it's possible one or
1903 * more of the rings is populated (while the rest are not). It is the
1904 * callers duty to clean those orphaned rings.
1905 *
1906 * Return 0 on success, negative on failure
1907 **/
1908static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1909{
1910 int i, err = 0;
1911
cc052927 1912 for (i = 0; i < adapter->num_active_queues; i++) {
d732a184 1913 adapter->rx_rings[i]->count = adapter->rx_desc_count;
5eae00c5
GR		 1914 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1915 if (!err)
1916 continue;
1917 dev_err(&adapter->pdev->dev,
fb43201f 1918 "Allocation for Rx Queue %u failed\n", i);
5eae00c5
GR		 1919 break;
1920 }
1921 return err;
1922}
1923
1924/**
1925 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1926 * @adapter: board private structure
1927 *
1928 * Free all receive software resources
1929 **/
e284fc88 1930void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
5eae00c5
GR		 1931{
1932 int i;
1933
cc052927 1934 for (i = 0; i < adapter->num_active_queues; i++)
5eae00c5
GR		 1935 if (adapter->rx_rings[i]->desc)
1936 i40evf_free_rx_resources(adapter->rx_rings[i]);
1937}
1938
1939/**
1940 * i40evf_open - Called when a network interface is made active
1941 * @netdev: network interface device structure
1942 *
1943 * Returns 0 on success, negative value on failure
1944 *
1945 * The open entry point is called when a network interface is made
1946 * active by the system (IFF_UP). At this point all resources needed
1947 * for transmit and receive operations are allocated, the interrupt
1948 * handler is registered with the OS, the watchdog timer is started,
1949 * and the stack is notified that the interface is ready.
1950 **/
1951static int i40evf_open(struct net_device *netdev)
1952{
1953 struct i40evf_adapter *adapter = netdev_priv(netdev);
1954 int err;
1955
ef8693eb
MW		 1956 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1957 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1958 return -EIO;
1959 }
e284fc88 1960 if (adapter->state != __I40EVF_DOWN || adapter->aq_required)
5eae00c5
GR		 1961 return -EBUSY;
1962
1963 /* allocate transmit descriptors */
1964 err = i40evf_setup_all_tx_resources(adapter);
1965 if (err)
1966 goto err_setup_tx;
1967
1968 /* allocate receive descriptors */
1969 err = i40evf_setup_all_rx_resources(adapter);
1970 if (err)
1971 goto err_setup_rx;
1972
1973 /* clear any pending interrupts, may auto mask */
1974 err = i40evf_request_traffic_irqs(adapter, netdev->name);
1975 if (err)
1976 goto err_req_irq;
1977
44151cd3 1978 i40evf_add_filter(adapter, adapter->hw.mac.addr);
5eae00c5
GR		 1979 i40evf_configure(adapter);
1980
1981 err = i40evf_up_complete(adapter);
1982 if (err)
1983 goto err_req_irq;
1984
1985 i40evf_irq_enable(adapter, true);
1986
1987 return 0;
1988
1989err_req_irq:
1990 i40evf_down(adapter);
1991 i40evf_free_traffic_irqs(adapter);
1992err_setup_rx:
1993 i40evf_free_all_rx_resources(adapter);
1994err_setup_tx:
1995 i40evf_free_all_tx_resources(adapter);
1996
1997 return err;
1998}
1999
2000/**
2001 * i40evf_close - Disables a network interface
2002 * @netdev: network interface device structure
2003 *
2004 * Returns 0, this is not allowed to fail
2005 *
2006 * The close entry point is called when an interface is de-activated
2007 * by the OS. The hardware is still under the drivers control, but
2008 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
2009 * are freed, along with all transmit and receive resources.
2010 **/
2011static int i40evf_close(struct net_device *netdev)
2012{
2013 struct i40evf_adapter *adapter = netdev_priv(netdev);
2014
ef8693eb
MW		 2015 if (adapter->state <= __I40EVF_DOWN)
2016 return 0;
2017
ef8693eb 2018
5eae00c5
GR		 2019 set_bit(__I40E_DOWN, &adapter->vsi.state);
2020
2021 i40evf_down(adapter);
ddf0b3a6 2022 adapter->state = __I40EVF_DOWN;
5eae00c5
GR		 2023 i40evf_free_traffic_irqs(adapter);
2024
5eae00c5
GR		 2025 return 0;
2026}
2027
2028/**
2029 * i40evf_get_stats - Get System Network Statistics
2030 * @netdev: network interface device structure
2031 *
2032 * Returns the address of the device statistics structure.
2033 * The statistics are actually updated from the timer callback.
2034 **/
2035static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
2036{
2037 struct i40evf_adapter *adapter = netdev_priv(netdev);
2038
2039 /* only return the current stats */
2040 return &adapter->net_stats;
2041}
2042
5eae00c5
GR		 2043/**
2044 * i40evf_change_mtu - Change the Maximum Transfer Unit
2045 * @netdev: network interface device structure
2046 * @new_mtu: new value for maximum frame size
2047 *
2048 * Returns 0 on success, negative on failure
2049 **/
2050static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
2051{
2052 struct i40evf_adapter *adapter = netdev_priv(netdev);
2053 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2054
2055 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
2056 return -EINVAL;
2057
5eae00c5 2058 netdev->mtu = new_mtu;
67c818a1
MW		 2059 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
2060 schedule_work(&adapter->reset_task);
2061
5eae00c5
GR		 2062 return 0;
2063}
2064
2065static const struct net_device_ops i40evf_netdev_ops = {
2066 .ndo_open = i40evf_open,
2067 .ndo_stop = i40evf_close,
2068 .ndo_start_xmit = i40evf_xmit_frame,
2069 .ndo_get_stats = i40evf_get_stats,
2070 .ndo_set_rx_mode = i40evf_set_rx_mode,
2071 .ndo_validate_addr = eth_validate_addr,
2072 .ndo_set_mac_address = i40evf_set_mac,
2073 .ndo_change_mtu = i40evf_change_mtu,
2074 .ndo_tx_timeout = i40evf_tx_timeout,
2075 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
2076 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
7709b4c1
AD		 2077#ifdef CONFIG_NET_POLL_CONTROLLER
2078 .ndo_poll_controller = i40evf_netpoll,
2079#endif
5eae00c5
GR		 2080};
2081
2082/**
2083 * i40evf_check_reset_complete - check that VF reset is complete
2084 * @hw: pointer to hw struct
2085 *
2086 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
2087 **/
2088static int i40evf_check_reset_complete(struct i40e_hw *hw)
2089{
2090 u32 rstat;
2091 int i;
2092
2093 for (i = 0; i < 100; i++) {
fd35886a
AS		 2094 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
2095 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
2096 if ((rstat == I40E_VFR_VFACTIVE) ||
2097 (rstat == I40E_VFR_COMPLETED))
5eae00c5 2098 return 0;
f98a2006 2099 usleep_range(10, 20);
5eae00c5
GR		 2100 }
2101 return -EBUSY;
2102}
2103
e6d038de
MW		 2104/**
2105 * i40evf_process_config - Process the config information we got from the PF
2106 * @adapter: board private structure
2107 *
2108 * Verify that we have a valid config struct, and set up our netdev features
2109 * and our VSI struct.
2110 **/
2111int i40evf_process_config(struct i40evf_adapter *adapter)
2112{
2113 struct net_device *netdev = adapter->netdev;
2114 int i;
2115
2116 /* got VF config message back from PF, now we can parse it */
2117 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2118 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2119 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2120 }
2121 if (!adapter->vsi_res) {
2122 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
2123 return -ENODEV;
2124 }
2125
2126 if (adapter->vf_res->vf_offload_flags
2127 & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
cc7e406c
MW		 2128 netdev->vlan_features = netdev->features &
2129 ~(NETIF_F_HW_VLAN_CTAG_TX |
2130 NETIF_F_HW_VLAN_CTAG_RX |
2131 NETIF_F_HW_VLAN_CTAG_FILTER);
e6d038de
MW		 2132 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2133 NETIF_F_HW_VLAN_CTAG_RX |
2134 NETIF_F_HW_VLAN_CTAG_FILTER;
2135 }
2136 netdev->features |= NETIF_F_HIGHDMA |
2137 NETIF_F_SG |
2138 NETIF_F_IP_CSUM |
2139 NETIF_F_SCTP_CSUM |
2140 NETIF_F_IPV6_CSUM |
2141 NETIF_F_TSO |
2142 NETIF_F_TSO6 |
2143 NETIF_F_RXCSUM |
2144 NETIF_F_GRO;
2145
2146 /* copy netdev features into list of user selectable features */
2147 netdev->hw_features |= netdev->features;
2148 netdev->hw_features &= ~NETIF_F_RXCSUM;
2149
2150 adapter->vsi.id = adapter->vsi_res->vsi_id;
2151
2152 adapter->vsi.back = adapter;
2153 adapter->vsi.base_vector = 1;
2154 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2155 adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2156 ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2157 adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2158 ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2159 adapter->vsi.netdev = adapter->netdev;
f578f5f4 2160 adapter->vsi.qs_handle = adapter->vsi_res->qset_handle;
e6d038de
MW		 2161 return 0;
2162}
2163
5eae00c5
GR		 2164/**
2165 * i40evf_init_task - worker thread to perform delayed initialization
2166 * @work: pointer to work_struct containing our data
2167 *
2168 * This task completes the work that was begun in probe. Due to the nature
2169 * of VF-PF communications, we may need to wait tens of milliseconds to get
dbedd44e 2170 * responses back from the PF. Rather than busy-wait in probe and bog down the
5eae00c5
GR		 2171 * whole system, we'll do it in a task so we can sleep.
2172 * This task only runs during driver init. Once we've established
2173 * communications with the PF driver and set up our netdev, the watchdog
2174 * takes over.
2175 **/
2176static void i40evf_init_task(struct work_struct *work)
2177{
2178 struct i40evf_adapter *adapter = container_of(work,
2179 struct i40evf_adapter,
2180 init_task.work);
2181 struct net_device *netdev = adapter->netdev;
5eae00c5
GR		 2182 struct i40e_hw *hw = &adapter->hw;
2183 struct pci_dev *pdev = adapter->pdev;
e6d038de 2184 int err, bufsz;
5eae00c5
GR		 2185
2186 switch (adapter->state) {
2187 case __I40EVF_STARTUP:
2188 /* driver loaded, probe complete */
ef8693eb
MW		 2189 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2190 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
5eae00c5
GR		 2191 err = i40e_set_mac_type(hw);
2192 if (err) {
c2a137cb
MW		 2193 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2194 err);
2619ef47 2195 goto err;
5eae00c5
GR		 2196 }
2197 err = i40evf_check_reset_complete(hw);
2198 if (err) {
0d9c7ea8 2199 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
75a64435 2200 err);
5eae00c5
GR		 2201 goto err;
2202 }
2203 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2204 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2205 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2206 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2207
2208 err = i40evf_init_adminq(hw);
2209 if (err) {
c2a137cb
MW		 2210 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2211 err);
5eae00c5
GR		 2212 goto err;
2213 }
2214 err = i40evf_send_api_ver(adapter);
2215 if (err) {
10bdd67b 2216 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
5eae00c5
GR		 2217 i40evf_shutdown_adminq(hw);
2218 goto err;
2219 }
2220 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2221 goto restart;
5eae00c5 2222 case __I40EVF_INIT_VERSION_CHECK:
10bdd67b 2223 if (!i40evf_asq_done(hw)) {
80e72893 2224 dev_err(&pdev->dev, "Admin queue command never completed\n");
906a6937
MW		 2225 i40evf_shutdown_adminq(hw);
2226 adapter->state = __I40EVF_STARTUP;
5eae00c5 2227 goto err;
10bdd67b 2228 }
5eae00c5
GR		 2229
2230 /* aq msg sent, awaiting reply */
2231 err = i40evf_verify_api_ver(adapter);
2232 if (err) {
d4f82fd3 2233 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
56f9920a 2234 err = i40evf_send_api_ver(adapter);
ee1693e5
MW		 2235 else
2236 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
2237 adapter->pf_version.major,
2238 adapter->pf_version.minor,
2239 I40E_VIRTCHNL_VERSION_MAJOR,
2240 I40E_VIRTCHNL_VERSION_MINOR);
5eae00c5
GR		 2241 goto err;
2242 }
2243 err = i40evf_send_vf_config_msg(adapter);
2244 if (err) {
3f2ab172 2245 dev_err(&pdev->dev, "Unable to send config request (%d)\n",
5eae00c5
GR		 2246 err);
2247 goto err;
2248 }
2249 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2250 goto restart;
5eae00c5
GR		 2251 case __I40EVF_INIT_GET_RESOURCES:
2252 /* aq msg sent, awaiting reply */
2253 if (!adapter->vf_res) {
2254 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2255 (I40E_MAX_VF_VSI *
2256 sizeof(struct i40e_virtchnl_vsi_resource));
2257 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
c2a137cb 2258 if (!adapter->vf_res)
5eae00c5 2259 goto err;
5eae00c5
GR		 2260 }
2261 err = i40evf_get_vf_config(adapter);
906a6937 2262 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
906a6937
MW		 2263 err = i40evf_send_vf_config_msg(adapter);
2264 goto err;
2265 }
5eae00c5 2266 if (err) {
c2a137cb
MW		 2267 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2268 err);
5eae00c5
GR		 2269 goto err_alloc;
2270 }
2271 adapter->state = __I40EVF_INIT_SW;
2272 break;
2273 default:
2274 goto err_alloc;
2275 }
e6d038de 2276 if (i40evf_process_config(adapter))
5eae00c5 2277 goto err_alloc;
e6d038de 2278 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 2279
2280 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2281
5eae00c5
GR		 2282 netdev->netdev_ops = &i40evf_netdev_ops;
2283 i40evf_set_ethtool_ops(netdev);
2284 netdev->watchdog_timeo = 5 * HZ;
3415e8ce 2285
5eae00c5 2286 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
b34f90e7 2287 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
c2a137cb 2288 adapter->hw.mac.addr);
14e52ee2
MW		 2289 eth_hw_addr_random(netdev);
2290 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
2291 } else {
2292 adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF;
2293 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2294 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
5eae00c5 2295 }
5eae00c5 2296
5eae00c5
GR		 2297 init_timer(&adapter->watchdog_timer);
2298 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2299 adapter->watchdog_timer.data = (unsigned long)adapter;
2300 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2301
cc052927
MW		 2302 adapter->num_active_queues = min_t(int,
2303 adapter->vsi_res->num_queue_pairs,
2304 (int)(num_online_cpus()));
d732a184
MW		 2305 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2306 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
5eae00c5
GR		 2307 err = i40evf_init_interrupt_scheme(adapter);
2308 if (err)
2309 goto err_sw_init;
2310 i40evf_map_rings_to_vectors(adapter);
1f012279
ASJ		 2311 if (adapter->vf_res->vf_offload_flags &
2312 I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
2313 adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
e25d00b8
ASJ		 2314 if (!RSS_AQ(adapter))
2315 i40evf_configure_rss(adapter);
5eae00c5
GR		 2316 err = i40evf_request_misc_irq(adapter);
2317 if (err)
2318 goto err_sw_init;
2319
2320 netif_carrier_off(netdev);
2321
ef8693eb
MW		 2322 if (!adapter->netdev_registered) {
2323 err = register_netdev(netdev);
2324 if (err)
2325 goto err_register;
2326 }
5eae00c5
GR		 2327
2328 adapter->netdev_registered = true;
2329
2330 netif_tx_stop_all_queues(netdev);
2331
b34f90e7 2332 dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
5eae00c5
GR		 2333 if (netdev->features & NETIF_F_GRO)
2334 dev_info(&pdev->dev, "GRO is enabled\n");
2335
2336 dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2337 adapter->state = __I40EVF_DOWN;
2338 set_bit(__I40E_DOWN, &adapter->vsi.state);
2339 i40evf_misc_irq_enable(adapter);
e25d00b8
ASJ		 2340
2341 if (RSS_AQ(adapter)) {
2342 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
2343 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
2344 } else {
2345 i40evf_configure_rss(adapter);
2346 }
5eae00c5
GR		 2347 return;
2348restart:
3f7e5c33 2349 schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
5eae00c5
GR		 2350 return;
2351
2352err_register:
2353 i40evf_free_misc_irq(adapter);
2354err_sw_init:
2355 i40evf_reset_interrupt_capability(adapter);
5eae00c5
GR		 2356err_alloc:
2357 kfree(adapter->vf_res);
2358 adapter->vf_res = NULL;
2359err:
2360 /* Things went into the weeds, so try again later */
2361 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
b9029e94 2362 dev_err(&pdev->dev, "Failed to communicate with PF; waiting before retry\n");
ef8693eb 2363 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
b9029e94
MW		 2364 i40evf_shutdown_adminq(hw);
2365 adapter->state = __I40EVF_STARTUP;
2366 schedule_delayed_work(&adapter->init_task, HZ * 5);
2367 return;
5eae00c5 2368 }
3f7e5c33 2369 schedule_delayed_work(&adapter->init_task, HZ);
5eae00c5
GR		 2370}
2371
2372/**
2373 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2374 * @pdev: pci device structure
2375 **/
2376static void i40evf_shutdown(struct pci_dev *pdev)
2377{
2378 struct net_device *netdev = pci_get_drvdata(pdev);
00293fdc 2379 struct i40evf_adapter *adapter = netdev_priv(netdev);
5eae00c5
GR		 2380
2381 netif_device_detach(netdev);
2382
2383 if (netif_running(netdev))
2384 i40evf_close(netdev);
2385
00293fdc
MW		 2386 /* Prevent the watchdog from running. */
2387 adapter->state = __I40EVF_REMOVE;
2388 adapter->aq_required = 0;
00293fdc 2389
5eae00c5
GR		 2390#ifdef CONFIG_PM
2391 pci_save_state(pdev);
2392
2393#endif
2394 pci_disable_device(pdev);
2395}
2396
2397/**
2398 * i40evf_probe - Device Initialization Routine
2399 * @pdev: PCI device information struct
2400 * @ent: entry in i40evf_pci_tbl
2401 *
2402 * Returns 0 on success, negative on failure
2403 *
2404 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2405 * The OS initialization, configuring of the adapter private structure,
2406 * and a hardware reset occur.
2407 **/
2408static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2409{
2410 struct net_device *netdev;
2411 struct i40evf_adapter *adapter = NULL;
2412 struct i40e_hw *hw = NULL;
dbbd8111 2413 int err;
5eae00c5
GR		 2414
2415 err = pci_enable_device(pdev);
2416 if (err)
2417 return err;
2418
6494294f 2419 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
6494294f 2420 if (err) {
e3e3bfdd
JS		 2421 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2422 if (err) {
2423 dev_err(&pdev->dev,
2424 "DMA configuration failed: 0x%x\n", err);
2425 goto err_dma;
2426 }
5eae00c5
GR		 2427 }
2428
2429 err = pci_request_regions(pdev, i40evf_driver_name);
2430 if (err) {
2431 dev_err(&pdev->dev,
2432 "pci_request_regions failed 0x%x\n", err);
2433 goto err_pci_reg;
2434 }
2435
2436 pci_enable_pcie_error_reporting(pdev);
2437
2438 pci_set_master(pdev);
2439
2440 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2441 MAX_TX_QUEUES);
2442 if (!netdev) {
2443 err = -ENOMEM;
2444 goto err_alloc_etherdev;
2445 }
2446
2447 SET_NETDEV_DEV(netdev, &pdev->dev);
2448
2449 pci_set_drvdata(pdev, netdev);
2450 adapter = netdev_priv(netdev);
5eae00c5
GR		 2451
2452 adapter->netdev = netdev;
2453 adapter->pdev = pdev;
2454
2455 hw = &adapter->hw;
2456 hw->back = adapter;
2457
41a1d04b 2458 adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
5eae00c5
GR		 2459 adapter->state = __I40EVF_STARTUP;
2460
2461 /* Call save state here because it relies on the adapter struct. */
2462 pci_save_state(pdev);
2463
2464 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2465 pci_resource_len(pdev, 0));
2466 if (!hw->hw_addr) {
2467 err = -EIO;
2468 goto err_ioremap;
2469 }
2470 hw->vendor_id = pdev->vendor;
2471 hw->device_id = pdev->device;
2472 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2473 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2474 hw->subsystem_device_id = pdev->subsystem_device;
2475 hw->bus.device = PCI_SLOT(pdev->devfn);
2476 hw->bus.func = PCI_FUNC(pdev->devfn);
2477
8bb1a540
SK		 2478 INIT_LIST_HEAD(&adapter->mac_filter_list);
2479 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2480
5eae00c5
GR		 2481 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2482 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2483 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2484 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
9b32b0b5
MW		 2485 schedule_delayed_work(&adapter->init_task,
2486 msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
5eae00c5
GR		 2487
2488 return 0;
2489
2490err_ioremap:
2491 free_netdev(netdev);
2492err_alloc_etherdev:
2493 pci_release_regions(pdev);
2494err_pci_reg:
2495err_dma:
2496 pci_disable_device(pdev);
2497 return err;
2498}
2499
2500#ifdef CONFIG_PM
2501/**
2502 * i40evf_suspend - Power management suspend routine
2503 * @pdev: PCI device information struct
2504 * @state: unused
2505 *
2506 * Called when the system (VM) is entering sleep/suspend.
2507 **/
2508static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2509{
2510 struct net_device *netdev = pci_get_drvdata(pdev);
2511 struct i40evf_adapter *adapter = netdev_priv(netdev);
2512 int retval = 0;
2513
2514 netif_device_detach(netdev);
2515
2516 if (netif_running(netdev)) {
2517 rtnl_lock();
2518 i40evf_down(adapter);
2519 rtnl_unlock();
2520 }
2521 i40evf_free_misc_irq(adapter);
2522 i40evf_reset_interrupt_capability(adapter);
2523
2524 retval = pci_save_state(pdev);
2525 if (retval)
2526 return retval;
2527
2528 pci_disable_device(pdev);
2529
2530 return 0;
2531}
2532
2533/**
dbedd44e 2534 * i40evf_resume - Power management resume routine
5eae00c5
GR		 2535 * @pdev: PCI device information struct
2536 *
2537 * Called when the system (VM) is resumed from sleep/suspend.
2538 **/
2539static int i40evf_resume(struct pci_dev *pdev)
2540{
2541 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2542 struct net_device *netdev = adapter->netdev;
2543 u32 err;
2544
2545 pci_set_power_state(pdev, PCI_D0);
2546 pci_restore_state(pdev);
2547 /* pci_restore_state clears dev->state_saved so call
2548 * pci_save_state to restore it.
2549 */
2550 pci_save_state(pdev);
2551
2552 err = pci_enable_device_mem(pdev);
2553 if (err) {
2554 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2555 return err;
2556 }
2557 pci_set_master(pdev);
2558
2559 rtnl_lock();
2560 err = i40evf_set_interrupt_capability(adapter);
2561 if (err) {
f2a1c368 2562 rtnl_unlock();
5eae00c5
GR		 2563 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2564 return err;
2565 }
2566 err = i40evf_request_misc_irq(adapter);
2567 rtnl_unlock();
2568 if (err) {
2569 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2570 return err;
2571 }
2572
2573 schedule_work(&adapter->reset_task);
2574
2575 netif_device_attach(netdev);
2576
2577 return err;
2578}
2579
2580#endif /* CONFIG_PM */
2581/**
2582 * i40evf_remove - Device Removal Routine
2583 * @pdev: PCI device information struct
2584 *
2585 * i40evf_remove is called by the PCI subsystem to alert the driver
2586 * that it should release a PCI device. The could be caused by a
2587 * Hot-Plug event, or because the driver is going to be removed from
2588 * memory.
2589 **/
2590static void i40evf_remove(struct pci_dev *pdev)
2591{
2592 struct net_device *netdev = pci_get_drvdata(pdev);
2593 struct i40evf_adapter *adapter = netdev_priv(netdev);
6ba36a24 2594 struct i40evf_mac_filter *f, *ftmp;
5eae00c5
GR		 2595 struct i40e_hw *hw = &adapter->hw;
2596
2597 cancel_delayed_work_sync(&adapter->init_task);
ef8693eb 2598 cancel_work_sync(&adapter->reset_task);
5eae00c5
GR		 2599
2600 if (adapter->netdev_registered) {
2601 unregister_netdev(netdev);
2602 adapter->netdev_registered = false;
2603 }
53d0b3ae 2604
f4a71881 2605 /* Shut down all the garbage mashers on the detention level */
5eae00c5 2606 adapter->state = __I40EVF_REMOVE;
f4a71881 2607 adapter->aq_required = 0;
f4a71881
MW		 2608 i40evf_request_reset(adapter);
2609 msleep(20);
2610 /* If the FW isn't responding, kick it once, but only once. */
2611 if (!i40evf_asq_done(hw)) {
2612 i40evf_request_reset(adapter);
2613 msleep(20);
2614 }
5eae00c5 2615
dbb01c8a 2616 if (adapter->msix_entries) {
5eae00c5 2617 i40evf_misc_irq_disable(adapter);
5eae00c5 2618 i40evf_free_misc_irq(adapter);
5eae00c5 2619 i40evf_reset_interrupt_capability(adapter);
d31944d6 2620 i40evf_free_q_vectors(adapter);
5eae00c5
GR		 2621 }
2622
e5d17c3e
MW		 2623 if (adapter->watchdog_timer.function)
2624 del_timer_sync(&adapter->watchdog_timer);
2625
dbb01c8a
MW		 2626 flush_scheduled_work();
2627
5eae00c5
GR		 2628 if (hw->aq.asq.count)
2629 i40evf_shutdown_adminq(hw);
2630
2631 iounmap(hw->hw_addr);
2632 pci_release_regions(pdev);
2633
e284fc88
MW		 2634 i40evf_free_all_tx_resources(adapter);
2635 i40evf_free_all_rx_resources(adapter);
5eae00c5
GR		 2636 i40evf_free_queues(adapter);
2637 kfree(adapter->vf_res);
6ba36a24
MW		 2638 /* If we got removed before an up/down sequence, we've got a filter
2639 * hanging out there that we need to get rid of.
2640 */
2641 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2642 list_del(&f->list);
2643 kfree(f);
2644 }
37dfdf37
MW		 2645 list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2646 list_del(&f->list);
2647 kfree(f);
2648 }
5eae00c5
GR		 2649
2650 free_netdev(netdev);
2651
2652 pci_disable_pcie_error_reporting(pdev);
2653
2654 pci_disable_device(pdev);
2655}
2656
2657static struct pci_driver i40evf_driver = {
2658 .name = i40evf_driver_name,
2659 .id_table = i40evf_pci_tbl,
2660 .probe = i40evf_probe,
2661 .remove = i40evf_remove,
2662#ifdef CONFIG_PM
2663 .suspend = i40evf_suspend,
2664 .resume = i40evf_resume,
2665#endif
2666 .shutdown = i40evf_shutdown,
2667};
2668
2669/**
2670 * i40e_init_module - Driver Registration Routine
2671 *
2672 * i40e_init_module is the first routine called when the driver is
2673 * loaded. All it does is register with the PCI subsystem.
2674 **/
2675static int __init i40evf_init_module(void)
2676{
2677 int ret;
75a64435 2678
5eae00c5 2679 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
75a64435 2680 i40evf_driver_version);
5eae00c5
GR		 2681
2682 pr_info("%s\n", i40evf_copyright);
2683
2684 ret = pci_register_driver(&i40evf_driver);
2685 return ret;
2686}
2687
2688module_init(i40evf_init_module);
2689
2690/**
2691 * i40e_exit_module - Driver Exit Cleanup Routine
2692 *
2693 * i40e_exit_module is called just before the driver is removed
2694 * from memory.
2695 **/
2696static void __exit i40evf_exit_module(void)
2697{
2698 pci_unregister_driver(&i40evf_driver);
2699}
2700
2701module_exit(i40evf_exit_module);
2702
2703/* i40evf_main.c */
Linux kernel - Deliverables
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