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i40evf: future-proof vfr_stat state check
[mirror_ubuntu-artful-kernel.git] / drivers / net / ethernet / intel / i40evf / i40evf_main.c
CommitLineData
5eae00c5
GR		 1/*******************************************************************************
2 *
3 * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
e1dfee8e 4 * Copyright(c) 2013 - 2014 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);
169f4076
MW		 31static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter);
32static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter);
5eae00c5
GR		 33static int i40evf_close(struct net_device *netdev);
34
35char i40evf_driver_name[] = "i40evf";
36static const char i40evf_driver_string[] =
0af56f44 37 "Intel(R) XL710/X710 Virtual Function Network Driver";
5eae00c5 38
4e776381 39#define DRV_VERSION "0.9.40"
5eae00c5
GR		 40const char i40evf_driver_version[] = DRV_VERSION;
41static const char i40evf_copyright[] =
673f2ebf 42 "Copyright (c) 2013 - 2014 Intel Corporation.";
5eae00c5
GR		 43
44/* i40evf_pci_tbl - PCI Device ID Table
45 *
46 * Wildcard entries (PCI_ANY_ID) should come last
47 * Last entry must be all 0s
48 *
49 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
50 * Class, Class Mask, private data (not used) }
51 */
52static DEFINE_PCI_DEVICE_TABLE(i40evf_pci_tbl) = {
ab60085e 53 {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
5eae00c5
GR		 54 /* required last entry */
55 {0, }
56};
57
58MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
59
60MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
61MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
62MODULE_LICENSE("GPL");
63MODULE_VERSION(DRV_VERSION);
64
65/**
66 * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
67 * @hw: pointer to the HW structure
68 * @mem: ptr to mem struct to fill out
69 * @size: size of memory requested
70 * @alignment: what to align the allocation to
71 **/
72i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
73 struct i40e_dma_mem *mem,
74 u64 size, u32 alignment)
75{
76 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
77
78 if (!mem)
79 return I40E_ERR_PARAM;
80
81 mem->size = ALIGN(size, alignment);
82 mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
83 (dma_addr_t *)&mem->pa, GFP_KERNEL);
84 if (mem->va)
85 return 0;
86 else
87 return I40E_ERR_NO_MEMORY;
88}
89
90/**
91 * i40evf_free_dma_mem_d - OS specific memory free for shared code
92 * @hw: pointer to the HW structure
93 * @mem: ptr to mem struct to free
94 **/
95i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
96{
97 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
98
99 if (!mem || !mem->va)
100 return I40E_ERR_PARAM;
101 dma_free_coherent(&adapter->pdev->dev, mem->size,
102 mem->va, (dma_addr_t)mem->pa);
103 return 0;
104}
105
106/**
107 * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
108 * @hw: pointer to the HW structure
109 * @mem: ptr to mem struct to fill out
110 * @size: size of memory requested
111 **/
112i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
113 struct i40e_virt_mem *mem, u32 size)
114{
115 if (!mem)
116 return I40E_ERR_PARAM;
117
118 mem->size = size;
119 mem->va = kzalloc(size, GFP_KERNEL);
120
121 if (mem->va)
122 return 0;
123 else
124 return I40E_ERR_NO_MEMORY;
125}
126
127/**
128 * i40evf_free_virt_mem_d - OS specific memory free for shared code
129 * @hw: pointer to the HW structure
130 * @mem: ptr to mem struct to free
131 **/
132i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
133 struct i40e_virt_mem *mem)
134{
135 if (!mem)
136 return I40E_ERR_PARAM;
137
138 /* it's ok to kfree a NULL pointer */
139 kfree(mem->va);
140
141 return 0;
142}
143
144/**
145 * i40evf_debug_d - OS dependent version of debug printing
146 * @hw: pointer to the HW structure
147 * @mask: debug level mask
148 * @fmt_str: printf-type format description
149 **/
150void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
151{
152 char buf[512];
153 va_list argptr;
154
155 if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
156 return;
157
158 va_start(argptr, fmt_str);
159 vsnprintf(buf, sizeof(buf), fmt_str, argptr);
160 va_end(argptr);
161
162 /* the debug string is already formatted with a newline */
163 pr_info("%s", buf);
164}
165
166/**
167 * i40evf_tx_timeout - Respond to a Tx Hang
168 * @netdev: network interface device structure
169 **/
170static void i40evf_tx_timeout(struct net_device *netdev)
171{
172 struct i40evf_adapter *adapter = netdev_priv(netdev);
173
174 adapter->tx_timeout_count++;
625777e3 175 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) {
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;
188 wr32(hw, I40E_VFINT_DYN_CTL01, 0);
189
190 /* read flush */
191 rd32(hw, I40E_VFGEN_RSTAT);
192
193 synchronize_irq(adapter->msix_entries[0].vector);
194}
195
196/**
197 * i40evf_misc_irq_enable - Enable default interrupt generation settings
198 * @adapter: board private structure
199 **/
200static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
201{
202 struct i40e_hw *hw = &adapter->hw;
203 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
204 I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
205 wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA_ADMINQ_MASK);
206
207 /* read flush */
208 rd32(hw, I40E_VFGEN_RSTAT);
209}
210
211/**
212 * i40evf_irq_disable - Mask off interrupt generation on the NIC
213 * @adapter: board private structure
214 **/
215static void i40evf_irq_disable(struct i40evf_adapter *adapter)
216{
217 int i;
218 struct i40e_hw *hw = &adapter->hw;
219
dbb01c8a
MW		 220 if (!adapter->msix_entries)
221 return;
222
5eae00c5
GR		 223 for (i = 1; i < adapter->num_msix_vectors; i++) {
224 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
225 synchronize_irq(adapter->msix_entries[i].vector);
226 }
227 /* read flush */
228 rd32(hw, I40E_VFGEN_RSTAT);
229
230}
231
232/**
233 * i40evf_irq_enable_queues - Enable interrupt for specified queues
234 * @adapter: board private structure
235 * @mask: bitmap of queues to enable
236 **/
237void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
238{
239 struct i40e_hw *hw = &adapter->hw;
240 int i;
241
242 for (i = 1; i < adapter->num_msix_vectors; i++) {
243 if (mask & (1 << (i - 1))) {
244 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
245 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
246 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
247 }
248 }
249}
250
251/**
252 * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
253 * @adapter: board private structure
254 * @mask: bitmap of vectors to trigger
255 **/
256static void i40evf_fire_sw_int(struct i40evf_adapter *adapter,
257 u32 mask)
258{
259 struct i40e_hw *hw = &adapter->hw;
260 int i;
261 uint32_t dyn_ctl;
262
164ec1bf
MW		 263 if (mask & 1) {
264 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
265 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
266 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
267 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
268 }
5eae00c5
GR		 269 for (i = 1; i < adapter->num_msix_vectors; i++) {
270 if (mask & (1 << i)) {
271 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
272 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
273 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
274 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
275 }
276 }
277}
278
279/**
280 * i40evf_irq_enable - Enable default interrupt generation settings
281 * @adapter: board private structure
282 **/
283void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
284{
285 struct i40e_hw *hw = &adapter->hw;
286
164ec1bf 287 i40evf_misc_irq_enable(adapter);
5eae00c5
GR		 288 i40evf_irq_enable_queues(adapter, ~0);
289
290 if (flush)
291 rd32(hw, I40E_VFGEN_RSTAT);
292}
293
294/**
295 * i40evf_msix_aq - Interrupt handler for vector 0
296 * @irq: interrupt number
297 * @data: pointer to netdev
298 **/
299static irqreturn_t i40evf_msix_aq(int irq, void *data)
300{
301 struct net_device *netdev = data;
302 struct i40evf_adapter *adapter = netdev_priv(netdev);
303 struct i40e_hw *hw = &adapter->hw;
304 u32 val;
305 u32 ena_mask;
306
307 /* handle non-queue interrupts */
308 val = rd32(hw, I40E_VFINT_ICR01);
309 ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
310
311
312 val = rd32(hw, I40E_VFINT_DYN_CTL01);
313 val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
314 wr32(hw, I40E_VFINT_DYN_CTL01, val);
315
316 /* re-enable interrupt causes */
317 wr32(hw, I40E_VFINT_ICR0_ENA1, ena_mask);
318 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK);
319
320 /* schedule work on the private workqueue */
321 schedule_work(&adapter->adminq_task);
322
323 return IRQ_HANDLED;
324}
325
326/**
327 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
328 * @irq: interrupt number
329 * @data: pointer to a q_vector
330 **/
331static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
332{
333 struct i40e_q_vector *q_vector = data;
334
335 if (!q_vector->tx.ring && !q_vector->rx.ring)
336 return IRQ_HANDLED;
337
338 napi_schedule(&q_vector->napi);
339
340 return IRQ_HANDLED;
341}
342
343/**
344 * i40evf_map_vector_to_rxq - associate irqs with rx queues
345 * @adapter: board private structure
346 * @v_idx: interrupt number
347 * @r_idx: queue number
348 **/
349static void
350i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
351{
352 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
353 struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
354
355 rx_ring->q_vector = q_vector;
356 rx_ring->next = q_vector->rx.ring;
357 rx_ring->vsi = &adapter->vsi;
358 q_vector->rx.ring = rx_ring;
359 q_vector->rx.count++;
360 q_vector->rx.latency_range = I40E_LOW_LATENCY;
361}
362
363/**
364 * i40evf_map_vector_to_txq - associate irqs with tx queues
365 * @adapter: board private structure
366 * @v_idx: interrupt number
367 * @t_idx: queue number
368 **/
369static void
370i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
371{
372 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
373 struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
374
375 tx_ring->q_vector = q_vector;
376 tx_ring->next = q_vector->tx.ring;
377 tx_ring->vsi = &adapter->vsi;
378 q_vector->tx.ring = tx_ring;
379 q_vector->tx.count++;
380 q_vector->tx.latency_range = I40E_LOW_LATENCY;
381 q_vector->num_ringpairs++;
382 q_vector->ring_mask |= (1 << t_idx);
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;
400 int rxr_remaining = adapter->vsi_res->num_queue_pairs;
401 int txr_remaining = adapter->vsi_res->num_queue_pairs;
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 */
411 if (q_vectors == (rxr_remaining * 2)) {
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
448/**
449 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
450 * @adapter: board private structure
451 *
452 * Allocates MSI-X vectors for tx and rx handling, and requests
453 * interrupts from the kernel.
454 **/
455static int
456i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
457{
458 int vector, err, q_vectors;
459 int rx_int_idx = 0, tx_int_idx = 0;
460
461 i40evf_irq_disable(adapter);
462 /* Decrement for Other and TCP Timer vectors */
463 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
464
465 for (vector = 0; vector < q_vectors; vector++) {
466 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
467
468 if (q_vector->tx.ring && q_vector->rx.ring) {
469 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
470 "i40evf-%s-%s-%d", basename,
471 "TxRx", rx_int_idx++);
472 tx_int_idx++;
473 } else if (q_vector->rx.ring) {
474 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
475 "i40evf-%s-%s-%d", basename,
476 "rx", rx_int_idx++);
477 } else if (q_vector->tx.ring) {
478 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
479 "i40evf-%s-%s-%d", basename,
480 "tx", tx_int_idx++);
481 } else {
482 /* skip this unused q_vector */
483 continue;
484 }
485 err = request_irq(
486 adapter->msix_entries[vector + NONQ_VECS].vector,
487 i40evf_msix_clean_rings,
488 0,
489 q_vector->name,
490 q_vector);
491 if (err) {
492 dev_info(&adapter->pdev->dev,
493 "%s: request_irq failed, error: %d\n",
494 __func__, err);
495 goto free_queue_irqs;
496 }
497 /* assign the mask for this irq */
498 irq_set_affinity_hint(
499 adapter->msix_entries[vector + NONQ_VECS].vector,
500 q_vector->affinity_mask);
501 }
502
503 return 0;
504
505free_queue_irqs:
506 while (vector) {
507 vector--;
508 irq_set_affinity_hint(
509 adapter->msix_entries[vector + NONQ_VECS].vector,
510 NULL);
511 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
512 adapter->q_vector[vector]);
513 }
514 return err;
515}
516
517/**
518 * i40evf_request_misc_irq - Initialize MSI-X interrupts
519 * @adapter: board private structure
520 *
521 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
522 * vector is only for the admin queue, and stays active even when the netdev
523 * is closed.
524 **/
525static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
526{
527 struct net_device *netdev = adapter->netdev;
528 int err;
529
b39c1e2c
JB		 530 snprintf(adapter->misc_vector_name,
531 sizeof(adapter->misc_vector_name) - 1, "i40evf:mbx");
5eae00c5 532 err = request_irq(adapter->msix_entries[0].vector,
e1dfee8e
MW		 533 &i40evf_msix_aq, 0,
534 adapter->misc_vector_name, netdev);
5eae00c5
GR		 535 if (err) {
536 dev_err(&adapter->pdev->dev,
77fa28be
CS		 537 "request_irq for %s failed: %d\n",
538 adapter->misc_vector_name, err);
5eae00c5
GR		 539 free_irq(adapter->msix_entries[0].vector, netdev);
540 }
541 return err;
542}
543
544/**
545 * i40evf_free_traffic_irqs - Free MSI-X interrupts
546 * @adapter: board private structure
547 *
548 * Frees all MSI-X vectors other than 0.
549 **/
550static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
551{
552 int i;
553 int q_vectors;
554 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
555
556 for (i = 0; i < q_vectors; i++) {
557 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
558 NULL);
559 free_irq(adapter->msix_entries[i+1].vector,
560 adapter->q_vector[i]);
561 }
562}
563
564/**
565 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
566 * @adapter: board private structure
567 *
568 * Frees MSI-X vector 0.
569 **/
570static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
571{
572 struct net_device *netdev = adapter->netdev;
573
574 free_irq(adapter->msix_entries[0].vector, netdev);
575}
576
577/**
578 * i40evf_configure_tx - Configure Transmit Unit after Reset
579 * @adapter: board private structure
580 *
581 * Configure the Tx unit of the MAC after a reset.
582 **/
583static void i40evf_configure_tx(struct i40evf_adapter *adapter)
584{
585 struct i40e_hw *hw = &adapter->hw;
586 int i;
587 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
588 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
589}
590
591/**
592 * i40evf_configure_rx - Configure Receive Unit after Reset
593 * @adapter: board private structure
594 *
595 * Configure the Rx unit of the MAC after a reset.
596 **/
597static void i40evf_configure_rx(struct i40evf_adapter *adapter)
598{
599 struct i40e_hw *hw = &adapter->hw;
600 struct net_device *netdev = adapter->netdev;
601 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
602 int i;
603 int rx_buf_len;
604
605
606 adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
607 adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
608
609 /* Decide whether to use packet split mode or not */
610 if (netdev->mtu > ETH_DATA_LEN) {
611 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
612 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
613 else
614 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
615 } else {
616 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
617 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
618 else
619 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
620 }
621
622 /* Set the RX buffer length according to the mode */
623 if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
624 rx_buf_len = I40E_RX_HDR_SIZE;
625 } else {
626 if (netdev->mtu <= ETH_DATA_LEN)
627 rx_buf_len = I40EVF_RXBUFFER_2048;
628 else
629 rx_buf_len = ALIGN(max_frame, 1024);
630 }
631
632 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
633 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
634 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
635 }
636}
637
638/**
639 * i40evf_find_vlan - Search filter list for specific vlan filter
640 * @adapter: board private structure
641 * @vlan: vlan tag
642 *
643 * Returns ptr to the filter object or NULL
644 **/
645static struct
646i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
647{
648 struct i40evf_vlan_filter *f;
649
650 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
651 if (vlan == f->vlan)
652 return f;
653 }
654 return NULL;
655}
656
657/**
658 * i40evf_add_vlan - Add a vlan filter to the list
659 * @adapter: board private structure
660 * @vlan: VLAN tag
661 *
662 * Returns ptr to the filter object or NULL when no memory available.
663 **/
664static struct
665i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
666{
667 struct i40evf_vlan_filter *f;
668
669 f = i40evf_find_vlan(adapter, vlan);
670 if (NULL == f) {
671 f = kzalloc(sizeof(*f), GFP_ATOMIC);
249c8b8d 672 if (NULL == f)
5eae00c5 673 return NULL;
249c8b8d 674
5eae00c5
GR		 675 f->vlan = vlan;
676
677 INIT_LIST_HEAD(&f->list);
678 list_add(&f->list, &adapter->vlan_filter_list);
679 f->add = true;
680 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
681 }
682
683 return f;
684}
685
686/**
687 * i40evf_del_vlan - Remove a vlan filter from the list
688 * @adapter: board private structure
689 * @vlan: VLAN tag
690 **/
691static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
692{
693 struct i40evf_vlan_filter *f;
694
695 f = i40evf_find_vlan(adapter, vlan);
696 if (f) {
697 f->remove = true;
698 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
699 }
5eae00c5
GR		 700}
701
702/**
703 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
704 * @netdev: network device struct
705 * @vid: VLAN tag
706 **/
707static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
708 __always_unused __be16 proto, u16 vid)
709{
710 struct i40evf_adapter *adapter = netdev_priv(netdev);
711
712 if (i40evf_add_vlan(adapter, vid) == NULL)
713 return -ENOMEM;
714 return 0;
715}
716
717/**
718 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
719 * @netdev: network device struct
720 * @vid: VLAN tag
721 **/
722static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
723 __always_unused __be16 proto, u16 vid)
724{
725 struct i40evf_adapter *adapter = netdev_priv(netdev);
726
727 i40evf_del_vlan(adapter, vid);
728 return 0;
729}
730
731/**
732 * i40evf_find_filter - Search filter list for specific mac filter
733 * @adapter: board private structure
734 * @macaddr: the MAC address
735 *
736 * Returns ptr to the filter object or NULL
737 **/
738static struct
739i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
740 u8 *macaddr)
741{
742 struct i40evf_mac_filter *f;
743
744 if (!macaddr)
745 return NULL;
746
747 list_for_each_entry(f, &adapter->mac_filter_list, list) {
748 if (ether_addr_equal(macaddr, f->macaddr))
749 return f;
750 }
751 return NULL;
752}
753
754/**
755 * i40e_add_filter - Add a mac filter to the filter list
756 * @adapter: board private structure
757 * @macaddr: the MAC address
758 *
759 * Returns ptr to the filter object or NULL when no memory available.
760 **/
761static struct
762i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
763 u8 *macaddr)
764{
765 struct i40evf_mac_filter *f;
766
767 if (!macaddr)
768 return NULL;
769
770 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
771 &adapter->crit_section))
b65476cd 772 udelay(1);
5eae00c5
GR		 773
774 f = i40evf_find_filter(adapter, macaddr);
775 if (NULL == f) {
776 f = kzalloc(sizeof(*f), GFP_ATOMIC);
777 if (NULL == f) {
5eae00c5
GR		 778 clear_bit(__I40EVF_IN_CRITICAL_TASK,
779 &adapter->crit_section);
780 return NULL;
781 }
782
9a173901 783 ether_addr_copy(f->macaddr, macaddr);
5eae00c5
GR		 784
785 list_add(&f->list, &adapter->mac_filter_list);
786 f->add = true;
787 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
788 }
789
790 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
791 return f;
792}
793
794/**
795 * i40evf_set_mac - NDO callback to set port mac address
796 * @netdev: network interface device structure
797 * @p: pointer to an address structure
798 *
799 * Returns 0 on success, negative on failure
800 **/
801static int i40evf_set_mac(struct net_device *netdev, void *p)
802{
803 struct i40evf_adapter *adapter = netdev_priv(netdev);
804 struct i40e_hw *hw = &adapter->hw;
805 struct i40evf_mac_filter *f;
806 struct sockaddr *addr = p;
807
808 if (!is_valid_ether_addr(addr->sa_data))
809 return -EADDRNOTAVAIL;
810
811 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
812 return 0;
813
814 f = i40evf_add_filter(adapter, addr->sa_data);
815 if (f) {
9a173901
GR		 816 ether_addr_copy(hw->mac.addr, addr->sa_data);
817 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
5eae00c5
GR		 818 }
819
820 return (f == NULL) ? -ENOMEM : 0;
821}
822
823/**
824 * i40evf_set_rx_mode - NDO callback to set the netdev filters
825 * @netdev: network interface device structure
826 **/
827static void i40evf_set_rx_mode(struct net_device *netdev)
828{
829 struct i40evf_adapter *adapter = netdev_priv(netdev);
830 struct i40evf_mac_filter *f, *ftmp;
831 struct netdev_hw_addr *uca;
832 struct netdev_hw_addr *mca;
833
834 /* add addr if not already in the filter list */
835 netdev_for_each_uc_addr(uca, netdev) {
836 i40evf_add_filter(adapter, uca->addr);
837 }
838 netdev_for_each_mc_addr(mca, netdev) {
839 i40evf_add_filter(adapter, mca->addr);
840 }
841
842 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
843 &adapter->crit_section))
b65476cd 844 udelay(1);
5eae00c5
GR		 845 /* remove filter if not in netdev list */
846 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
847 bool found = false;
848
dc5f2de6 849 if (is_multicast_ether_addr(f->macaddr)) {
5eae00c5
GR		 850 netdev_for_each_mc_addr(mca, netdev) {
851 if (ether_addr_equal(mca->addr, f->macaddr)) {
852 found = true;
853 break;
854 }
855 }
856 } else {
857 netdev_for_each_uc_addr(uca, netdev) {
858 if (ether_addr_equal(uca->addr, f->macaddr)) {
859 found = true;
860 break;
861 }
862 }
863 }
864 if (found) {
865 f->remove = true;
866 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
867 }
868 }
869 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
870}
871
872/**
873 * i40evf_napi_enable_all - enable NAPI on all queue vectors
874 * @adapter: board private structure
875 **/
876static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
877{
878 int q_idx;
879 struct i40e_q_vector *q_vector;
880 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
881
882 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
883 struct napi_struct *napi;
884 q_vector = adapter->q_vector[q_idx];
885 napi = &q_vector->napi;
886 napi_enable(napi);
887 }
888}
889
890/**
891 * i40evf_napi_disable_all - disable NAPI on all queue vectors
892 * @adapter: board private structure
893 **/
894static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
895{
896 int q_idx;
897 struct i40e_q_vector *q_vector;
898 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
899
900 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
901 q_vector = adapter->q_vector[q_idx];
902 napi_disable(&q_vector->napi);
903 }
904}
905
906/**
907 * i40evf_configure - set up transmit and receive data structures
908 * @adapter: board private structure
909 **/
910static void i40evf_configure(struct i40evf_adapter *adapter)
911{
912 struct net_device *netdev = adapter->netdev;
913 int i;
914
915 i40evf_set_rx_mode(netdev);
916
917 i40evf_configure_tx(adapter);
918 i40evf_configure_rx(adapter);
919 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
920
921 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
922 struct i40e_ring *ring = adapter->rx_rings[i];
923 i40evf_alloc_rx_buffers(ring, ring->count);
924 ring->next_to_use = ring->count - 1;
925 writel(ring->next_to_use, ring->tail);
926 }
927}
928
929/**
930 * i40evf_up_complete - Finish the last steps of bringing up a connection
931 * @adapter: board private structure
932 **/
933static int i40evf_up_complete(struct i40evf_adapter *adapter)
934{
935 adapter->state = __I40EVF_RUNNING;
936 clear_bit(__I40E_DOWN, &adapter->vsi.state);
937
938 i40evf_napi_enable_all(adapter);
939
940 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
941 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
942 return 0;
943}
944
945/**
946 * i40evf_clean_all_rx_rings - Free Rx Buffers for all queues
947 * @adapter: board private structure
948 **/
949static void i40evf_clean_all_rx_rings(struct i40evf_adapter *adapter)
950{
951 int i;
952
953 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
954 i40evf_clean_rx_ring(adapter->rx_rings[i]);
955}
956
957/**
958 * i40evf_clean_all_tx_rings - Free Tx Buffers for all queues
959 * @adapter: board private structure
960 **/
961static void i40evf_clean_all_tx_rings(struct i40evf_adapter *adapter)
962{
963 int i;
964
965 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
966 i40evf_clean_tx_ring(adapter->tx_rings[i]);
967}
968
969/**
970 * i40e_down - Shutdown the connection processing
971 * @adapter: board private structure
972 **/
973void i40evf_down(struct i40evf_adapter *adapter)
974{
975 struct net_device *netdev = adapter->netdev;
976 struct i40evf_mac_filter *f;
977
ddf0b3a6
MW		 978 if (adapter->state == __I40EVF_DOWN)
979 return;
980
ef8693eb 981 /* remove all MAC filters */
5eae00c5
GR		 982 list_for_each_entry(f, &adapter->mac_filter_list, list) {
983 f->remove = true;
984 }
ed1f5b58
MW		 985 /* remove all VLAN filters */
986 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
987 f->remove = true;
988 }
ef8693eb
MW		 989 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
990 adapter->state != __I40EVF_RESETTING) {
991 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
ed1f5b58 992 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
ef8693eb
MW		 993 /* disable receives */
994 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
995 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
996 msleep(20);
997 }
5eae00c5
GR		 998 netif_tx_disable(netdev);
999
1000 netif_tx_stop_all_queues(netdev);
1001
1002 i40evf_irq_disable(adapter);
1003
1004 i40evf_napi_disable_all(adapter);
1005
1006 netif_carrier_off(netdev);
1007
1008 i40evf_clean_all_tx_rings(adapter);
1009 i40evf_clean_all_rx_rings(adapter);
1010}
1011
1012/**
1013 * i40evf_acquire_msix_vectors - Setup the MSIX capability
1014 * @adapter: board private structure
1015 * @vectors: number of vectors to request
1016 *
1017 * Work with the OS to set up the MSIX vectors needed.
1018 *
1019 * Returns 0 on success, negative on failure
1020 **/
1021static int
1022i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1023{
1024 int err, vector_threshold;
1025
1026 /* We'll want at least 3 (vector_threshold):
1027 * 0) Other (Admin Queue and link, mostly)
1028 * 1) TxQ[0] Cleanup
1029 * 2) RxQ[0] Cleanup
1030 */
1031 vector_threshold = MIN_MSIX_COUNT;
1032
1033 /* The more we get, the more we will assign to Tx/Rx Cleanup
1034 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1035 * Right now, we simply care about how many we'll get; we'll
1036 * set them up later while requesting irq's.
1037 */
fc2f2f5d
AG		 1038 err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1039 vector_threshold, vectors);
1040 if (err < 0) {
80e72893 1041 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
5eae00c5
GR		 1042 kfree(adapter->msix_entries);
1043 adapter->msix_entries = NULL;
fc2f2f5d 1044 return err;
5eae00c5 1045 }
fc2f2f5d
AG		 1046
1047 /* Adjust for only the vectors we'll use, which is minimum
1048 * of max_msix_q_vectors + NONQ_VECS, or the number of
1049 * vectors we were allocated.
1050 */
1051 adapter->num_msix_vectors = err;
1052 return 0;
5eae00c5
GR		 1053}
1054
1055/**
1056 * i40evf_free_queues - Free memory for all rings
1057 * @adapter: board private structure to initialize
1058 *
1059 * Free all of the memory associated with queue pairs.
1060 **/
1061static void i40evf_free_queues(struct i40evf_adapter *adapter)
1062{
1063 int i;
1064
1065 if (!adapter->vsi_res)
1066 return;
1067 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1068 if (adapter->tx_rings[i])
1069 kfree_rcu(adapter->tx_rings[i], rcu);
1070 adapter->tx_rings[i] = NULL;
1071 adapter->rx_rings[i] = NULL;
1072 }
1073}
1074
1075/**
1076 * i40evf_alloc_queues - Allocate memory for all rings
1077 * @adapter: board private structure to initialize
1078 *
1079 * We allocate one ring per queue at run-time since we don't know the
1080 * number of queues at compile-time. The polling_netdev array is
1081 * intended for Multiqueue, but should work fine with a single queue.
1082 **/
1083static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1084{
1085 int i;
1086
1087 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1088 struct i40e_ring *tx_ring;
1089 struct i40e_ring *rx_ring;
1090
1091 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
1092 if (!tx_ring)
1093 goto err_out;
1094
1095 tx_ring->queue_index = i;
1096 tx_ring->netdev = adapter->netdev;
1097 tx_ring->dev = &adapter->pdev->dev;
d732a184 1098 tx_ring->count = adapter->tx_desc_count;
5eae00c5
GR		 1099 adapter->tx_rings[i] = tx_ring;
1100
1101 rx_ring = &tx_ring[1];
1102 rx_ring->queue_index = i;
1103 rx_ring->netdev = adapter->netdev;
1104 rx_ring->dev = &adapter->pdev->dev;
d732a184 1105 rx_ring->count = adapter->rx_desc_count;
5eae00c5
GR		 1106 adapter->rx_rings[i] = rx_ring;
1107 }
1108
1109 return 0;
1110
1111err_out:
1112 i40evf_free_queues(adapter);
1113 return -ENOMEM;
1114}
1115
1116/**
1117 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1118 * @adapter: board private structure to initialize
1119 *
1120 * Attempt to configure the interrupts using the best available
1121 * capabilities of the hardware and the kernel.
1122 **/
1123static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1124{
1125 int vector, v_budget;
1126 int pairs = 0;
1127 int err = 0;
1128
1129 if (!adapter->vsi_res) {
1130 err = -EIO;
1131 goto out;
1132 }
1133 pairs = adapter->vsi_res->num_queue_pairs;
1134
1135 /* It's easy to be greedy for MSI-X vectors, but it really
1136 * doesn't do us much good if we have a lot more vectors
1137 * than CPU's. So let's be conservative and only ask for
1138 * (roughly) twice the number of vectors as there are CPU's.
1139 */
30a500e2
MW		 1140 v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1141 v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
5eae00c5 1142
5eae00c5
GR		 1143 adapter->msix_entries = kcalloc(v_budget,
1144 sizeof(struct msix_entry), GFP_KERNEL);
1145 if (!adapter->msix_entries) {
1146 err = -ENOMEM;
1147 goto out;
1148 }
1149
1150 for (vector = 0; vector < v_budget; vector++)
1151 adapter->msix_entries[vector].entry = vector;
1152
1153 i40evf_acquire_msix_vectors(adapter, v_budget);
1154
1155out:
1156 adapter->netdev->real_num_tx_queues = pairs;
1157 return err;
1158}
1159
1160/**
1161 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1162 * @adapter: board private structure to initialize
1163 *
1164 * We allocate one q_vector per queue interrupt. If allocation fails we
1165 * return -ENOMEM.
1166 **/
1167static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1168{
1169 int q_idx, num_q_vectors;
1170 struct i40e_q_vector *q_vector;
1171
1172 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1173
1174 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1175 q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
1176 if (!q_vector)
1177 goto err_out;
1178 q_vector->adapter = adapter;
1179 q_vector->vsi = &adapter->vsi;
1180 q_vector->v_idx = q_idx;
1181 netif_napi_add(adapter->netdev, &q_vector->napi,
eefeacee 1182 i40evf_napi_poll, NAPI_POLL_WEIGHT);
5eae00c5
GR		 1183 adapter->q_vector[q_idx] = q_vector;
1184 }
1185
1186 return 0;
1187
1188err_out:
1189 while (q_idx) {
1190 q_idx--;
1191 q_vector = adapter->q_vector[q_idx];
1192 netif_napi_del(&q_vector->napi);
1193 kfree(q_vector);
1194 adapter->q_vector[q_idx] = NULL;
1195 }
1196 return -ENOMEM;
1197}
1198
1199/**
1200 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1201 * @adapter: board private structure to initialize
1202 *
1203 * This function frees the memory allocated to the q_vectors. In addition if
1204 * NAPI is enabled it will delete any references to the NAPI struct prior
1205 * to freeing the q_vector.
1206 **/
1207static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1208{
1209 int q_idx, num_q_vectors;
1210 int napi_vectors;
1211
1212 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1213 napi_vectors = adapter->vsi_res->num_queue_pairs;
1214
1215 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1216 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1217
1218 adapter->q_vector[q_idx] = NULL;
1219 if (q_idx < napi_vectors)
1220 netif_napi_del(&q_vector->napi);
1221 kfree(q_vector);
1222 }
1223}
1224
1225/**
1226 * i40evf_reset_interrupt_capability - Reset MSIX setup
1227 * @adapter: board private structure
1228 *
1229 **/
1230void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1231{
1232 pci_disable_msix(adapter->pdev);
1233 kfree(adapter->msix_entries);
1234 adapter->msix_entries = NULL;
5eae00c5
GR		 1235}
1236
1237/**
1238 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1239 * @adapter: board private structure to initialize
1240 *
1241 **/
1242int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1243{
1244 int err;
1245
1246 err = i40evf_set_interrupt_capability(adapter);
1247 if (err) {
1248 dev_err(&adapter->pdev->dev,
1249 "Unable to setup interrupt capabilities\n");
1250 goto err_set_interrupt;
1251 }
1252
1253 err = i40evf_alloc_q_vectors(adapter);
1254 if (err) {
1255 dev_err(&adapter->pdev->dev,
1256 "Unable to allocate memory for queue vectors\n");
1257 goto err_alloc_q_vectors;
1258 }
1259
1260 err = i40evf_alloc_queues(adapter);
1261 if (err) {
1262 dev_err(&adapter->pdev->dev,
1263 "Unable to allocate memory for queues\n");
1264 goto err_alloc_queues;
1265 }
1266
1267 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1268 (adapter->vsi_res->num_queue_pairs > 1) ? "Enabled" :
1269 "Disabled", adapter->vsi_res->num_queue_pairs);
1270
1271 return 0;
1272err_alloc_queues:
1273 i40evf_free_q_vectors(adapter);
1274err_alloc_q_vectors:
1275 i40evf_reset_interrupt_capability(adapter);
1276err_set_interrupt:
1277 return err;
1278}
1279
1280/**
1281 * i40evf_watchdog_timer - Periodic call-back timer
1282 * @data: pointer to adapter disguised as unsigned long
1283 **/
1284static void i40evf_watchdog_timer(unsigned long data)
1285{
1286 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1287 schedule_work(&adapter->watchdog_task);
1288 /* timer will be rescheduled in watchdog task */
1289}
1290
1291/**
1292 * i40evf_watchdog_task - Periodic call-back task
1293 * @work: pointer to work_struct
1294 **/
1295static void i40evf_watchdog_task(struct work_struct *work)
1296{
1297 struct i40evf_adapter *adapter = container_of(work,
1298 struct i40evf_adapter,
1299 watchdog_task);
1300 struct i40e_hw *hw = &adapter->hw;
fd35886a 1301 uint32_t rstat_val;
5eae00c5 1302
ef8693eb
MW		 1303 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1304 goto restart_watchdog;
1305
1306 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
fd35886a
AS		 1307 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1308 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1309 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1310 (rstat_val == I40E_VFR_COMPLETED)) {
ef8693eb
MW		 1311 /* A chance for redemption! */
1312 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1313 adapter->state = __I40EVF_STARTUP;
1314 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1315 schedule_delayed_work(&adapter->init_task, 10);
1316 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1317 &adapter->crit_section);
1318 /* Don't reschedule the watchdog, since we've restarted
1319 * the init task. When init_task contacts the PF and
1320 * gets everything set up again, it'll restart the
1321 * watchdog for us. Down, boy. Sit. Stay. Woof.
1322 */
1323 return;
1324 }
1325 adapter->aq_pending = 0;
1326 adapter->aq_required = 0;
1327 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5 1328 goto watchdog_done;
ef8693eb 1329 }
5eae00c5 1330
ef8693eb
MW		 1331 if ((adapter->state < __I40EVF_DOWN) ||
1332 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
5eae00c5
GR		 1333 goto watchdog_done;
1334
ef8693eb 1335 /* check for reset */
fd35886a
AS		 1336 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1337 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
ef8693eb 1338 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
fd35886a
AS		 1339 (rstat_val != I40E_VFR_VFACTIVE) &&
1340 (rstat_val != I40E_VFR_COMPLETED)) {
5eae00c5 1341 adapter->state = __I40EVF_RESETTING;
ef8693eb 1342 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
249c8b8d 1343 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
5eae00c5 1344 schedule_work(&adapter->reset_task);
ef8693eb
MW		 1345 adapter->aq_pending = 0;
1346 adapter->aq_required = 0;
1347 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 1348 goto watchdog_done;
1349 }
1350
1351 /* Process admin queue tasks. After init, everything gets done
1352 * here so we don't race on the admin queue.
1353 */
1354 if (adapter->aq_pending)
1355 goto watchdog_done;
1356
1357 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1358 i40evf_map_queues(adapter);
1359 goto watchdog_done;
1360 }
1361
1362 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1363 i40evf_add_ether_addrs(adapter);
1364 goto watchdog_done;
1365 }
1366
1367 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1368 i40evf_add_vlans(adapter);
1369 goto watchdog_done;
1370 }
1371
1372 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1373 i40evf_del_ether_addrs(adapter);
1374 goto watchdog_done;
1375 }
1376
1377 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1378 i40evf_del_vlans(adapter);
1379 goto watchdog_done;
1380 }
1381
1382 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1383 i40evf_disable_queues(adapter);
1384 goto watchdog_done;
1385 }
1386
1387 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1388 i40evf_configure_queues(adapter);
1389 goto watchdog_done;
1390 }
1391
1392 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1393 i40evf_enable_queues(adapter);
1394 goto watchdog_done;
1395 }
1396
1397 if (adapter->state == __I40EVF_RUNNING)
1398 i40evf_request_stats(adapter);
1399
1400 i40evf_irq_enable(adapter, true);
1401 i40evf_fire_sw_int(adapter, 0xFF);
ef8693eb 1402
5eae00c5 1403watchdog_done:
ef8693eb
MW		 1404 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1405restart_watchdog:
5eae00c5
GR		 1406 if (adapter->aq_required)
1407 mod_timer(&adapter->watchdog_timer,
1408 jiffies + msecs_to_jiffies(20));
1409 else
1410 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
5eae00c5
GR		 1411 schedule_work(&adapter->adminq_task);
1412}
1413
5b7af02c 1414/**
3dd5550f 1415 * next_queue - increment to next available tx queue
5b7af02c
MW		 1416 * @adapter: board private structure
1417 * @j: queue counter
1418 *
1419 * Helper function for RSS programming to increment through available
1420 * queus. Returns the next queue value.
1421 **/
96d47704
MW		 1422static int next_queue(struct i40evf_adapter *adapter, int j)
1423{
1424 j += 1;
1425
1426 return j >= adapter->vsi_res->num_queue_pairs ? 0 : j;
1427}
1428
5eae00c5
GR		 1429/**
1430 * i40evf_configure_rss - Prepare for RSS if used
1431 * @adapter: board private structure
1432 **/
1433static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1434{
1435 struct i40e_hw *hw = &adapter->hw;
1436 u32 lut = 0;
1437 int i, j;
1438 u64 hena;
1439
1440 /* Set of random keys generated using kernel random number generator */
1441 static const u32 seed[I40E_VFQF_HKEY_MAX_INDEX + 1] = {
1442 0x794221b4, 0xbca0c5ab, 0x6cd5ebd9, 0x1ada6127,
1443 0x983b3aa1, 0x1c4e71eb, 0x7f6328b2, 0xfcdc0da0,
1444 0xc135cafa, 0x7a6f7e2d, 0xe7102d28, 0x163cd12e,
1445 0x4954b126 };
1446
1447 /* Hash type is configured by the PF - we just supply the key */
1448
1449 /* Fill out hash function seed */
1450 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1451 wr32(hw, I40E_VFQF_HKEY(i), seed[i]);
1452
1453 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1454 hena = I40E_DEFAULT_RSS_HENA;
1455 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1456 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1457
1458 /* Populate the LUT with max no. of queues in round robin fashion */
96d47704
MW		 1459 j = adapter->vsi_res->num_queue_pairs;
1460 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
5b7af02c
MW		 1461 j = next_queue(adapter, j);
1462 lut = j;
1463 j = next_queue(adapter, j);
1464 lut |= j << 8;
1465 j = next_queue(adapter, j);
1466 lut |= j << 16;
1467 j = next_queue(adapter, j);
1468 lut |= j << 24;
96d47704 1469 wr32(hw, I40E_VFQF_HLUT(i), lut);
5eae00c5
GR		 1470 }
1471 i40e_flush(hw);
1472}
1473
ef8693eb
MW		 1474#define I40EVF_RESET_WAIT_MS 100
1475#define I40EVF_RESET_WAIT_COUNT 200
5eae00c5
GR		 1476/**
1477 * i40evf_reset_task - Call-back task to handle hardware reset
1478 * @work: pointer to work_struct
1479 *
1480 * During reset we need to shut down and reinitialize the admin queue
1481 * before we can use it to communicate with the PF again. We also clear
1482 * and reinit the rings because that context is lost as well.
1483 **/
1484static void i40evf_reset_task(struct work_struct *work)
1485{
ef8693eb
MW		 1486 struct i40evf_adapter *adapter = container_of(work,
1487 struct i40evf_adapter,
1488 reset_task);
5eae00c5
GR		 1489 struct i40e_hw *hw = &adapter->hw;
1490 int i = 0, err;
1491 uint32_t rstat_val;
1492
1493 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1494 &adapter->crit_section))
1495 udelay(500);
3526d800
MW		 1496
1497 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1498 dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
1499 i40evf_request_reset(adapter);
1500 }
1501
ef8693eb
MW		 1502 /* poll until we see the reset actually happen */
1503 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1504 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1505 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
fd35886a
AS		 1506 if ((rstat_val != I40E_VFR_VFACTIVE) &&
1507 (rstat_val != I40E_VFR_COMPLETED))
ef8693eb 1508 break;
63158f91 1509 else
ef8693eb 1510 msleep(I40EVF_RESET_WAIT_MS);
ef8693eb
MW		 1511 }
1512 if (i == I40EVF_RESET_WAIT_COUNT) {
ef8693eb
MW		 1513 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1514 goto continue_reset; /* act like the reset happened */
1515 }
5eae00c5 1516
ef8693eb
MW		 1517 /* wait until the reset is complete and the PF is responding to us */
1518 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
5eae00c5
GR		 1519 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1520 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
fd35886a
AS		 1521 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1522 (rstat_val == I40E_VFR_COMPLETED))
5eae00c5 1523 break;
63158f91 1524 else
ef8693eb 1525 msleep(I40EVF_RESET_WAIT_MS);
5eae00c5 1526 }
ef8693eb 1527 if (i == I40EVF_RESET_WAIT_COUNT) {
5eae00c5 1528 /* reset never finished */
80e72893 1529 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
ef8693eb
MW		 1530 rstat_val);
1531 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1532
169f4076
MW		 1533 if (netif_running(adapter->netdev)) {
1534 set_bit(__I40E_DOWN, &adapter->vsi.state);
1535 i40evf_down(adapter);
1536 i40evf_free_traffic_irqs(adapter);
1537 i40evf_free_all_tx_resources(adapter);
1538 i40evf_free_all_rx_resources(adapter);
1539 }
ef8693eb
MW		 1540 i40evf_free_misc_irq(adapter);
1541 i40evf_reset_interrupt_capability(adapter);
1542 i40evf_free_queues(adapter);
1543 kfree(adapter->vf_res);
1544 i40evf_shutdown_adminq(hw);
1545 adapter->netdev->flags &= ~IFF_UP;
1546 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1547 return; /* Do not attempt to reinit. It's dead, Jim. */
5eae00c5 1548 }
ef8693eb
MW		 1549
1550continue_reset:
1551 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1552
5eae00c5
GR		 1553 i40evf_down(adapter);
1554 adapter->state = __I40EVF_RESETTING;
1555
1556 /* kill and reinit the admin queue */
1557 if (i40evf_shutdown_adminq(hw))
1558 dev_warn(&adapter->pdev->dev,
1559 "%s: Failed to destroy the Admin Queue resources\n",
1560 __func__);
1561 err = i40evf_init_adminq(hw);
1562 if (err)
1563 dev_info(&adapter->pdev->dev, "%s: init_adminq failed: %d\n",
1564 __func__, err);
1565
1566 adapter->aq_pending = 0;
1567 adapter->aq_required = 0;
1568 i40evf_map_queues(adapter);
1569 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1570
1571 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1572
1573 if (netif_running(adapter->netdev)) {
1574 /* allocate transmit descriptors */
1575 err = i40evf_setup_all_tx_resources(adapter);
1576 if (err)
1577 goto reset_err;
1578
1579 /* allocate receive descriptors */
1580 err = i40evf_setup_all_rx_resources(adapter);
1581 if (err)
1582 goto reset_err;
1583
1584 i40evf_configure(adapter);
1585
1586 err = i40evf_up_complete(adapter);
1587 if (err)
1588 goto reset_err;
1589
1590 i40evf_irq_enable(adapter, true);
1591 }
1592 return;
1593reset_err:
80e72893 1594 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
5eae00c5
GR		 1595 i40evf_close(adapter->netdev);
1596}
1597
1598/**
1599 * i40evf_adminq_task - worker thread to clean the admin queue
1600 * @work: pointer to work_struct containing our data
1601 **/
1602static void i40evf_adminq_task(struct work_struct *work)
1603{
1604 struct i40evf_adapter *adapter =
1605 container_of(work, struct i40evf_adapter, adminq_task);
1606 struct i40e_hw *hw = &adapter->hw;
1607 struct i40e_arq_event_info event;
1608 struct i40e_virtchnl_msg *v_msg;
1609 i40e_status ret;
912257e5 1610 u32 val, oldval;
5eae00c5
GR		 1611 u16 pending;
1612
ef8693eb
MW		 1613 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1614 return;
1615
5eae00c5
GR		 1616 event.msg_size = I40EVF_MAX_AQ_BUF_SIZE;
1617 event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
249c8b8d 1618 if (!event.msg_buf)
5eae00c5 1619 return;
249c8b8d 1620
5eae00c5
GR		 1621 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1622 do {
1623 ret = i40evf_clean_arq_element(hw, &event, &pending);
1624 if (ret)
1625 break; /* No event to process or error cleaning ARQ */
1626
1627 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1628 v_msg->v_retval, event.msg_buf,
1629 event.msg_size);
1630 if (pending != 0) {
1631 dev_info(&adapter->pdev->dev,
1632 "%s: ARQ: Pending events %d\n",
1633 __func__, pending);
1634 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1635 }
1636 } while (pending);
1637
912257e5
MW		 1638 /* check for error indications */
1639 val = rd32(hw, hw->aq.arq.len);
1640 oldval = val;
1641 if (val & I40E_VF_ARQLEN_ARQVFE_MASK) {
1642 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1643 val &= ~I40E_VF_ARQLEN_ARQVFE_MASK;
1644 }
1645 if (val & I40E_VF_ARQLEN_ARQOVFL_MASK) {
1646 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1647 val &= ~I40E_VF_ARQLEN_ARQOVFL_MASK;
1648 }
1649 if (val & I40E_VF_ARQLEN_ARQCRIT_MASK) {
1650 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1651 val &= ~I40E_VF_ARQLEN_ARQCRIT_MASK;
1652 }
1653 if (oldval != val)
1654 wr32(hw, hw->aq.arq.len, val);
1655
1656 val = rd32(hw, hw->aq.asq.len);
1657 oldval = val;
1658 if (val & I40E_VF_ATQLEN_ATQVFE_MASK) {
1659 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1660 val &= ~I40E_VF_ATQLEN_ATQVFE_MASK;
1661 }
1662 if (val & I40E_VF_ATQLEN_ATQOVFL_MASK) {
1663 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1664 val &= ~I40E_VF_ATQLEN_ATQOVFL_MASK;
1665 }
1666 if (val & I40E_VF_ATQLEN_ATQCRIT_MASK) {
1667 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1668 val &= ~I40E_VF_ATQLEN_ATQCRIT_MASK;
1669 }
1670 if (oldval != val)
1671 wr32(hw, hw->aq.asq.len, val);
1672
5eae00c5
GR		 1673 /* re-enable Admin queue interrupt cause */
1674 i40evf_misc_irq_enable(adapter);
1675
1676 kfree(event.msg_buf);
1677}
1678
1679/**
1680 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1681 * @adapter: board private structure
1682 *
1683 * Free all transmit software resources
1684 **/
1685static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1686{
1687 int i;
1688
1689 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1690 if (adapter->tx_rings[i]->desc)
1691 i40evf_free_tx_resources(adapter->tx_rings[i]);
1692
1693}
1694
1695/**
1696 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1697 * @adapter: board private structure
1698 *
1699 * If this function returns with an error, then it's possible one or
1700 * more of the rings is populated (while the rest are not). It is the
1701 * callers duty to clean those orphaned rings.
1702 *
1703 * Return 0 on success, negative on failure
1704 **/
1705static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1706{
1707 int i, err = 0;
1708
1709 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
d732a184 1710 adapter->tx_rings[i]->count = adapter->tx_desc_count;
5eae00c5
GR		 1711 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1712 if (!err)
1713 continue;
1714 dev_err(&adapter->pdev->dev,
1715 "%s: Allocation for Tx Queue %u failed\n",
1716 __func__, i);
1717 break;
1718 }
1719
1720 return err;
1721}
1722
1723/**
1724 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1725 * @adapter: board private structure
1726 *
1727 * If this function returns with an error, then it's possible one or
1728 * more of the rings is populated (while the rest are not). It is the
1729 * callers duty to clean those orphaned rings.
1730 *
1731 * Return 0 on success, negative on failure
1732 **/
1733static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1734{
1735 int i, err = 0;
1736
1737 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
d732a184 1738 adapter->rx_rings[i]->count = adapter->rx_desc_count;
5eae00c5
GR		 1739 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1740 if (!err)
1741 continue;
1742 dev_err(&adapter->pdev->dev,
1743 "%s: Allocation for Rx Queue %u failed\n",
1744 __func__, i);
1745 break;
1746 }
1747 return err;
1748}
1749
1750/**
1751 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1752 * @adapter: board private structure
1753 *
1754 * Free all receive software resources
1755 **/
1756static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1757{
1758 int i;
1759
1760 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1761 if (adapter->rx_rings[i]->desc)
1762 i40evf_free_rx_resources(adapter->rx_rings[i]);
1763}
1764
1765/**
1766 * i40evf_open - Called when a network interface is made active
1767 * @netdev: network interface device structure
1768 *
1769 * Returns 0 on success, negative value on failure
1770 *
1771 * The open entry point is called when a network interface is made
1772 * active by the system (IFF_UP). At this point all resources needed
1773 * for transmit and receive operations are allocated, the interrupt
1774 * handler is registered with the OS, the watchdog timer is started,
1775 * and the stack is notified that the interface is ready.
1776 **/
1777static int i40evf_open(struct net_device *netdev)
1778{
1779 struct i40evf_adapter *adapter = netdev_priv(netdev);
1780 int err;
1781
ef8693eb
MW		 1782 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1783 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1784 return -EIO;
1785 }
5eae00c5
GR		 1786 if (adapter->state != __I40EVF_DOWN)
1787 return -EBUSY;
1788
1789 /* allocate transmit descriptors */
1790 err = i40evf_setup_all_tx_resources(adapter);
1791 if (err)
1792 goto err_setup_tx;
1793
1794 /* allocate receive descriptors */
1795 err = i40evf_setup_all_rx_resources(adapter);
1796 if (err)
1797 goto err_setup_rx;
1798
1799 /* clear any pending interrupts, may auto mask */
1800 err = i40evf_request_traffic_irqs(adapter, netdev->name);
1801 if (err)
1802 goto err_req_irq;
1803
1804 i40evf_configure(adapter);
1805
1806 err = i40evf_up_complete(adapter);
1807 if (err)
1808 goto err_req_irq;
1809
1810 i40evf_irq_enable(adapter, true);
1811
1812 return 0;
1813
1814err_req_irq:
1815 i40evf_down(adapter);
1816 i40evf_free_traffic_irqs(adapter);
1817err_setup_rx:
1818 i40evf_free_all_rx_resources(adapter);
1819err_setup_tx:
1820 i40evf_free_all_tx_resources(adapter);
1821
1822 return err;
1823}
1824
1825/**
1826 * i40evf_close - Disables a network interface
1827 * @netdev: network interface device structure
1828 *
1829 * Returns 0, this is not allowed to fail
1830 *
1831 * The close entry point is called when an interface is de-activated
1832 * by the OS. The hardware is still under the drivers control, but
1833 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1834 * are freed, along with all transmit and receive resources.
1835 **/
1836static int i40evf_close(struct net_device *netdev)
1837{
1838 struct i40evf_adapter *adapter = netdev_priv(netdev);
1839
ef8693eb
MW		 1840 if (adapter->state <= __I40EVF_DOWN)
1841 return 0;
1842
ef8693eb 1843
5eae00c5
GR		 1844 set_bit(__I40E_DOWN, &adapter->vsi.state);
1845
1846 i40evf_down(adapter);
ddf0b3a6 1847 adapter->state = __I40EVF_DOWN;
5eae00c5
GR		 1848 i40evf_free_traffic_irqs(adapter);
1849
1850 i40evf_free_all_tx_resources(adapter);
1851 i40evf_free_all_rx_resources(adapter);
1852
1853 return 0;
1854}
1855
1856/**
1857 * i40evf_get_stats - Get System Network Statistics
1858 * @netdev: network interface device structure
1859 *
1860 * Returns the address of the device statistics structure.
1861 * The statistics are actually updated from the timer callback.
1862 **/
1863static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1864{
1865 struct i40evf_adapter *adapter = netdev_priv(netdev);
1866
1867 /* only return the current stats */
1868 return &adapter->net_stats;
1869}
1870
1871/**
1872 * i40evf_reinit_locked - Software reinit
1873 * @adapter: board private structure
1874 *
1875 * Reinititalizes the ring structures in response to a software configuration
1876 * change. Roughly the same as close followed by open, but skips releasing
1877 * and reallocating the interrupts.
1878 **/
1879void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1880{
1881 struct net_device *netdev = adapter->netdev;
1882 int err;
1883
1884 WARN_ON(in_interrupt());
1885
5eae00c5
GR		 1886 i40evf_down(adapter);
1887
1888 /* allocate transmit descriptors */
1889 err = i40evf_setup_all_tx_resources(adapter);
1890 if (err)
1891 goto err_reinit;
1892
1893 /* allocate receive descriptors */
1894 err = i40evf_setup_all_rx_resources(adapter);
1895 if (err)
1896 goto err_reinit;
1897
1898 i40evf_configure(adapter);
1899
1900 err = i40evf_up_complete(adapter);
1901 if (err)
1902 goto err_reinit;
1903
1904 i40evf_irq_enable(adapter, true);
1905 return;
1906
1907err_reinit:
80e72893 1908 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
5eae00c5
GR		 1909 i40evf_close(netdev);
1910}
1911
1912/**
1913 * i40evf_change_mtu - Change the Maximum Transfer Unit
1914 * @netdev: network interface device structure
1915 * @new_mtu: new value for maximum frame size
1916 *
1917 * Returns 0 on success, negative on failure
1918 **/
1919static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1920{
1921 struct i40evf_adapter *adapter = netdev_priv(netdev);
1922 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1923
1924 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1925 return -EINVAL;
1926
1927 /* must set new MTU before calling down or up */
1928 netdev->mtu = new_mtu;
1929 i40evf_reinit_locked(adapter);
1930 return 0;
1931}
1932
1933static const struct net_device_ops i40evf_netdev_ops = {
1934 .ndo_open = i40evf_open,
1935 .ndo_stop = i40evf_close,
1936 .ndo_start_xmit = i40evf_xmit_frame,
1937 .ndo_get_stats = i40evf_get_stats,
1938 .ndo_set_rx_mode = i40evf_set_rx_mode,
1939 .ndo_validate_addr = eth_validate_addr,
1940 .ndo_set_mac_address = i40evf_set_mac,
1941 .ndo_change_mtu = i40evf_change_mtu,
1942 .ndo_tx_timeout = i40evf_tx_timeout,
1943 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
1944 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
1945};
1946
1947/**
1948 * i40evf_check_reset_complete - check that VF reset is complete
1949 * @hw: pointer to hw struct
1950 *
1951 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1952 **/
1953static int i40evf_check_reset_complete(struct i40e_hw *hw)
1954{
1955 u32 rstat;
1956 int i;
1957
1958 for (i = 0; i < 100; i++) {
fd35886a
AS		 1959 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
1960 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1961 if ((rstat == I40E_VFR_VFACTIVE) ||
1962 (rstat == I40E_VFR_COMPLETED))
5eae00c5
GR		 1963 return 0;
1964 udelay(10);
1965 }
1966 return -EBUSY;
1967}
1968
1969/**
1970 * i40evf_init_task - worker thread to perform delayed initialization
1971 * @work: pointer to work_struct containing our data
1972 *
1973 * This task completes the work that was begun in probe. Due to the nature
1974 * of VF-PF communications, we may need to wait tens of milliseconds to get
1975 * reponses back from the PF. Rather than busy-wait in probe and bog down the
1976 * whole system, we'll do it in a task so we can sleep.
1977 * This task only runs during driver init. Once we've established
1978 * communications with the PF driver and set up our netdev, the watchdog
1979 * takes over.
1980 **/
1981static void i40evf_init_task(struct work_struct *work)
1982{
1983 struct i40evf_adapter *adapter = container_of(work,
1984 struct i40evf_adapter,
1985 init_task.work);
1986 struct net_device *netdev = adapter->netdev;
1987 struct i40evf_mac_filter *f;
1988 struct i40e_hw *hw = &adapter->hw;
1989 struct pci_dev *pdev = adapter->pdev;
1990 int i, err, bufsz;
1991
1992 switch (adapter->state) {
1993 case __I40EVF_STARTUP:
1994 /* driver loaded, probe complete */
ef8693eb
MW		 1995 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1996 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
5eae00c5
GR		 1997 err = i40e_set_mac_type(hw);
1998 if (err) {
c2a137cb
MW		 1999 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2000 err);
5eae00c5
GR		 2001 goto err;
2002 }
2003 err = i40evf_check_reset_complete(hw);
2004 if (err) {
0d9c7ea8 2005 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
c2a137cb 2006 err);
5eae00c5
GR		 2007 goto err;
2008 }
2009 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2010 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2011 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2012 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2013
2014 err = i40evf_init_adminq(hw);
2015 if (err) {
c2a137cb
MW		 2016 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2017 err);
5eae00c5
GR		 2018 goto err;
2019 }
2020 err = i40evf_send_api_ver(adapter);
2021 if (err) {
10bdd67b 2022 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
5eae00c5
GR		 2023 i40evf_shutdown_adminq(hw);
2024 goto err;
2025 }
2026 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2027 goto restart;
5eae00c5 2028 case __I40EVF_INIT_VERSION_CHECK:
10bdd67b 2029 if (!i40evf_asq_done(hw)) {
80e72893 2030 dev_err(&pdev->dev, "Admin queue command never completed\n");
5eae00c5 2031 goto err;
10bdd67b 2032 }
5eae00c5
GR		 2033
2034 /* aq msg sent, awaiting reply */
2035 err = i40evf_verify_api_ver(adapter);
2036 if (err) {
0d9c7ea8 2037 dev_info(&pdev->dev, "Unable to verify API version (%d), retrying\n",
5eae00c5 2038 err);
56f9920a
MW		 2039 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2040 dev_info(&pdev->dev, "Resending request\n");
2041 err = i40evf_send_api_ver(adapter);
2042 }
5eae00c5
GR		 2043 goto err;
2044 }
2045 err = i40evf_send_vf_config_msg(adapter);
2046 if (err) {
3f2ab172 2047 dev_err(&pdev->dev, "Unable to send config request (%d)\n",
5eae00c5
GR		 2048 err);
2049 goto err;
2050 }
2051 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2052 goto restart;
5eae00c5
GR		 2053 case __I40EVF_INIT_GET_RESOURCES:
2054 /* aq msg sent, awaiting reply */
2055 if (!adapter->vf_res) {
2056 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2057 (I40E_MAX_VF_VSI *
2058 sizeof(struct i40e_virtchnl_vsi_resource));
2059 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
c2a137cb 2060 if (!adapter->vf_res)
5eae00c5 2061 goto err;
5eae00c5
GR		 2062 }
2063 err = i40evf_get_vf_config(adapter);
2064 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2065 goto restart;
2066 if (err) {
c2a137cb
MW		 2067 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2068 err);
5eae00c5
GR		 2069 goto err_alloc;
2070 }
2071 adapter->state = __I40EVF_INIT_SW;
2072 break;
2073 default:
2074 goto err_alloc;
2075 }
2076 /* got VF config message back from PF, now we can parse it */
2077 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2078 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2079 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2080 }
2081 if (!adapter->vsi_res) {
c2a137cb 2082 dev_err(&pdev->dev, "No LAN VSI found\n");
5eae00c5
GR		 2083 goto err_alloc;
2084 }
2085
2086 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2087
5eae00c5
GR		 2088 netdev->netdev_ops = &i40evf_netdev_ops;
2089 i40evf_set_ethtool_ops(netdev);
2090 netdev->watchdog_timeo = 5 * HZ;
dbbd8111
MW		 2091 netdev->features |= NETIF_F_HIGHDMA |
2092 NETIF_F_SG |
5eae00c5
GR		 2093 NETIF_F_IP_CSUM |
2094 NETIF_F_SCTP_CSUM |
2095 NETIF_F_IPV6_CSUM |
2096 NETIF_F_TSO |
2097 NETIF_F_TSO6 |
3415e8ce 2098 NETIF_F_RXCSUM |
5eae00c5
GR		 2099 NETIF_F_GRO;
2100
2101 if (adapter->vf_res->vf_offload_flags
2102 & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2103 netdev->vlan_features = netdev->features;
2104 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2105 NETIF_F_HW_VLAN_CTAG_RX |
2106 NETIF_F_HW_VLAN_CTAG_FILTER;
2107 }
2108
3415e8ce
GR		 2109 /* copy netdev features into list of user selectable features */
2110 netdev->hw_features |= netdev->features;
2111 netdev->hw_features &= ~NETIF_F_RXCSUM;
2112
5eae00c5 2113 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
b34f90e7 2114 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
c2a137cb 2115 adapter->hw.mac.addr);
5eae00c5
GR		 2116 random_ether_addr(adapter->hw.mac.addr);
2117 }
9a173901
GR		 2118 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2119 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
5eae00c5
GR		 2120
2121 INIT_LIST_HEAD(&adapter->mac_filter_list);
2122 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2123 f = kzalloc(sizeof(*f), GFP_ATOMIC);
2124 if (NULL == f)
2125 goto err_sw_init;
2126
9a173901 2127 ether_addr_copy(f->macaddr, adapter->hw.mac.addr);
5eae00c5
GR		 2128 f->add = true;
2129 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2130
2131 list_add(&f->list, &adapter->mac_filter_list);
2132
2133 init_timer(&adapter->watchdog_timer);
2134 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2135 adapter->watchdog_timer.data = (unsigned long)adapter;
2136 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2137
d732a184
MW		 2138 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2139 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
5eae00c5
GR		 2140 err = i40evf_init_interrupt_scheme(adapter);
2141 if (err)
2142 goto err_sw_init;
2143 i40evf_map_rings_to_vectors(adapter);
2144 i40evf_configure_rss(adapter);
2145 err = i40evf_request_misc_irq(adapter);
2146 if (err)
2147 goto err_sw_init;
2148
2149 netif_carrier_off(netdev);
2150
5eae00c5
GR		 2151 adapter->vsi.id = adapter->vsi_res->vsi_id;
2152 adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2153 adapter->vsi.back = adapter;
2154 adapter->vsi.base_vector = 1;
2155 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
ca99eb99
MW		 2156 adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2157 ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2158 adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2159 ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
5eae00c5
GR		 2160 adapter->vsi.netdev = adapter->netdev;
2161
ef8693eb
MW		 2162 if (!adapter->netdev_registered) {
2163 err = register_netdev(netdev);
2164 if (err)
2165 goto err_register;
2166 }
5eae00c5
GR		 2167
2168 adapter->netdev_registered = true;
2169
2170 netif_tx_stop_all_queues(netdev);
2171
b34f90e7 2172 dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
5eae00c5
GR		 2173 if (netdev->features & NETIF_F_GRO)
2174 dev_info(&pdev->dev, "GRO is enabled\n");
2175
2176 dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2177 adapter->state = __I40EVF_DOWN;
2178 set_bit(__I40E_DOWN, &adapter->vsi.state);
2179 i40evf_misc_irq_enable(adapter);
2180 return;
2181restart:
2182 schedule_delayed_work(&adapter->init_task,
2183 msecs_to_jiffies(50));
2184 return;
2185
2186err_register:
2187 i40evf_free_misc_irq(adapter);
2188err_sw_init:
2189 i40evf_reset_interrupt_capability(adapter);
5eae00c5
GR		 2190err_alloc:
2191 kfree(adapter->vf_res);
2192 adapter->vf_res = NULL;
2193err:
2194 /* Things went into the weeds, so try again later */
2195 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
80e72893 2196 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
ef8693eb 2197 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
5eae00c5
GR		 2198 return; /* do not reschedule */
2199 }
2200 schedule_delayed_work(&adapter->init_task, HZ * 3);
5eae00c5
GR		 2201}
2202
2203/**
2204 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2205 * @pdev: pci device structure
2206 **/
2207static void i40evf_shutdown(struct pci_dev *pdev)
2208{
2209 struct net_device *netdev = pci_get_drvdata(pdev);
2210
2211 netif_device_detach(netdev);
2212
2213 if (netif_running(netdev))
2214 i40evf_close(netdev);
2215
2216#ifdef CONFIG_PM
2217 pci_save_state(pdev);
2218
2219#endif
2220 pci_disable_device(pdev);
2221}
2222
2223/**
2224 * i40evf_probe - Device Initialization Routine
2225 * @pdev: PCI device information struct
2226 * @ent: entry in i40evf_pci_tbl
2227 *
2228 * Returns 0 on success, negative on failure
2229 *
2230 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2231 * The OS initialization, configuring of the adapter private structure,
2232 * and a hardware reset occur.
2233 **/
2234static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2235{
2236 struct net_device *netdev;
2237 struct i40evf_adapter *adapter = NULL;
2238 struct i40e_hw *hw = NULL;
dbbd8111 2239 int err;
5eae00c5
GR		 2240
2241 err = pci_enable_device(pdev);
2242 if (err)
2243 return err;
2244
6494294f 2245 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
6494294f 2246 if (err) {
e3e3bfdd
JS		 2247 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2248 if (err) {
2249 dev_err(&pdev->dev,
2250 "DMA configuration failed: 0x%x\n", err);
2251 goto err_dma;
2252 }
5eae00c5
GR		 2253 }
2254
2255 err = pci_request_regions(pdev, i40evf_driver_name);
2256 if (err) {
2257 dev_err(&pdev->dev,
2258 "pci_request_regions failed 0x%x\n", err);
2259 goto err_pci_reg;
2260 }
2261
2262 pci_enable_pcie_error_reporting(pdev);
2263
2264 pci_set_master(pdev);
2265
2266 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2267 MAX_TX_QUEUES);
2268 if (!netdev) {
2269 err = -ENOMEM;
2270 goto err_alloc_etherdev;
2271 }
2272
2273 SET_NETDEV_DEV(netdev, &pdev->dev);
2274
2275 pci_set_drvdata(pdev, netdev);
2276 adapter = netdev_priv(netdev);
5eae00c5
GR		 2277
2278 adapter->netdev = netdev;
2279 adapter->pdev = pdev;
2280
2281 hw = &adapter->hw;
2282 hw->back = adapter;
2283
2284 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2285 adapter->state = __I40EVF_STARTUP;
2286
2287 /* Call save state here because it relies on the adapter struct. */
2288 pci_save_state(pdev);
2289
2290 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2291 pci_resource_len(pdev, 0));
2292 if (!hw->hw_addr) {
2293 err = -EIO;
2294 goto err_ioremap;
2295 }
2296 hw->vendor_id = pdev->vendor;
2297 hw->device_id = pdev->device;
2298 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2299 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2300 hw->subsystem_device_id = pdev->subsystem_device;
2301 hw->bus.device = PCI_SLOT(pdev->devfn);
2302 hw->bus.func = PCI_FUNC(pdev->devfn);
2303
2304 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2305 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2306 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2307 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2308 schedule_delayed_work(&adapter->init_task, 10);
2309
2310 return 0;
2311
2312err_ioremap:
2313 free_netdev(netdev);
2314err_alloc_etherdev:
2315 pci_release_regions(pdev);
2316err_pci_reg:
2317err_dma:
2318 pci_disable_device(pdev);
2319 return err;
2320}
2321
2322#ifdef CONFIG_PM
2323/**
2324 * i40evf_suspend - Power management suspend routine
2325 * @pdev: PCI device information struct
2326 * @state: unused
2327 *
2328 * Called when the system (VM) is entering sleep/suspend.
2329 **/
2330static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2331{
2332 struct net_device *netdev = pci_get_drvdata(pdev);
2333 struct i40evf_adapter *adapter = netdev_priv(netdev);
2334 int retval = 0;
2335
2336 netif_device_detach(netdev);
2337
2338 if (netif_running(netdev)) {
2339 rtnl_lock();
2340 i40evf_down(adapter);
2341 rtnl_unlock();
2342 }
2343 i40evf_free_misc_irq(adapter);
2344 i40evf_reset_interrupt_capability(adapter);
2345
2346 retval = pci_save_state(pdev);
2347 if (retval)
2348 return retval;
2349
2350 pci_disable_device(pdev);
2351
2352 return 0;
2353}
2354
2355/**
2356 * i40evf_resume - Power managment resume routine
2357 * @pdev: PCI device information struct
2358 *
2359 * Called when the system (VM) is resumed from sleep/suspend.
2360 **/
2361static int i40evf_resume(struct pci_dev *pdev)
2362{
2363 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2364 struct net_device *netdev = adapter->netdev;
2365 u32 err;
2366
2367 pci_set_power_state(pdev, PCI_D0);
2368 pci_restore_state(pdev);
2369 /* pci_restore_state clears dev->state_saved so call
2370 * pci_save_state to restore it.
2371 */
2372 pci_save_state(pdev);
2373
2374 err = pci_enable_device_mem(pdev);
2375 if (err) {
2376 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2377 return err;
2378 }
2379 pci_set_master(pdev);
2380
2381 rtnl_lock();
2382 err = i40evf_set_interrupt_capability(adapter);
2383 if (err) {
2384 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2385 return err;
2386 }
2387 err = i40evf_request_misc_irq(adapter);
2388 rtnl_unlock();
2389 if (err) {
2390 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2391 return err;
2392 }
2393
2394 schedule_work(&adapter->reset_task);
2395
2396 netif_device_attach(netdev);
2397
2398 return err;
2399}
2400
2401#endif /* CONFIG_PM */
2402/**
2403 * i40evf_remove - Device Removal Routine
2404 * @pdev: PCI device information struct
2405 *
2406 * i40evf_remove is called by the PCI subsystem to alert the driver
2407 * that it should release a PCI device. The could be caused by a
2408 * Hot-Plug event, or because the driver is going to be removed from
2409 * memory.
2410 **/
2411static void i40evf_remove(struct pci_dev *pdev)
2412{
2413 struct net_device *netdev = pci_get_drvdata(pdev);
2414 struct i40evf_adapter *adapter = netdev_priv(netdev);
2415 struct i40e_hw *hw = &adapter->hw;
2416
2417 cancel_delayed_work_sync(&adapter->init_task);
ef8693eb 2418 cancel_work_sync(&adapter->reset_task);
5eae00c5
GR		 2419
2420 if (adapter->netdev_registered) {
2421 unregister_netdev(netdev);
2422 adapter->netdev_registered = false;
2423 }
2424 adapter->state = __I40EVF_REMOVE;
2425
dbb01c8a 2426 if (adapter->msix_entries) {
5eae00c5 2427 i40evf_misc_irq_disable(adapter);
5eae00c5 2428 i40evf_free_misc_irq(adapter);
5eae00c5
GR		 2429 i40evf_reset_interrupt_capability(adapter);
2430 }
2431
e5d17c3e
MW		 2432 if (adapter->watchdog_timer.function)
2433 del_timer_sync(&adapter->watchdog_timer);
2434
dbb01c8a
MW		 2435 flush_scheduled_work();
2436
5eae00c5
GR		 2437 if (hw->aq.asq.count)
2438 i40evf_shutdown_adminq(hw);
2439
2440 iounmap(hw->hw_addr);
2441 pci_release_regions(pdev);
2442
2443 i40evf_free_queues(adapter);
2444 kfree(adapter->vf_res);
2445
2446 free_netdev(netdev);
2447
2448 pci_disable_pcie_error_reporting(pdev);
2449
2450 pci_disable_device(pdev);
2451}
2452
2453static struct pci_driver i40evf_driver = {
2454 .name = i40evf_driver_name,
2455 .id_table = i40evf_pci_tbl,
2456 .probe = i40evf_probe,
2457 .remove = i40evf_remove,
2458#ifdef CONFIG_PM
2459 .suspend = i40evf_suspend,
2460 .resume = i40evf_resume,
2461#endif
2462 .shutdown = i40evf_shutdown,
2463};
2464
2465/**
2466 * i40e_init_module - Driver Registration Routine
2467 *
2468 * i40e_init_module is the first routine called when the driver is
2469 * loaded. All it does is register with the PCI subsystem.
2470 **/
2471static int __init i40evf_init_module(void)
2472{
2473 int ret;
2474 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2475 i40evf_driver_version);
2476
2477 pr_info("%s\n", i40evf_copyright);
2478
2479 ret = pci_register_driver(&i40evf_driver);
2480 return ret;
2481}
2482
2483module_init(i40evf_init_module);
2484
2485/**
2486 * i40e_exit_module - Driver Exit Cleanup Routine
2487 *
2488 * i40e_exit_module is called just before the driver is removed
2489 * from memory.
2490 **/
2491static void __exit i40evf_exit_module(void)
2492{
2493 pci_unregister_driver(&i40evf_driver);
2494}
2495
2496module_exit(i40evf_exit_module);
2497
2498/* i40evf_main.c */
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