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i40evf: remove leftover VLAN filters
[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
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
a36fdd8e 39#define DRV_VERSION "1.0.6"
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 */
9baa3c34 52static const struct pci_device_id 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;
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);
207 wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA_ADMINQ_MASK);
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++) {
244 if (mask & (1 << (i - 1))) {
245 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
246 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
247 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
248 }
249 }
250}
251
252/**
253 * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
254 * @adapter: board private structure
255 * @mask: bitmap of vectors to trigger
256 **/
75a64435 257static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
5eae00c5
GR		 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;
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 */
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;
75a64435 554
5eae00c5
GR		 555 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
556
557 for (i = 0; i < q_vectors; i++) {
558 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
559 NULL);
560 free_irq(adapter->msix_entries[i+1].vector,
561 adapter->q_vector[i]);
562 }
563}
564
565/**
566 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
567 * @adapter: board private structure
568 *
569 * Frees MSI-X vector 0.
570 **/
571static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
572{
573 struct net_device *netdev = adapter->netdev;
574
575 free_irq(adapter->msix_entries[0].vector, netdev);
576}
577
578/**
579 * i40evf_configure_tx - Configure Transmit Unit after Reset
580 * @adapter: board private structure
581 *
582 * Configure the Tx unit of the MAC after a reset.
583 **/
584static void i40evf_configure_tx(struct i40evf_adapter *adapter)
585{
586 struct i40e_hw *hw = &adapter->hw;
587 int i;
75a64435 588
cc052927 589 for (i = 0; i < adapter->num_active_queues; i++)
5eae00c5
GR		 590 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
591}
592
593/**
594 * i40evf_configure_rx - Configure Receive Unit after Reset
595 * @adapter: board private structure
596 *
597 * Configure the Rx unit of the MAC after a reset.
598 **/
599static void i40evf_configure_rx(struct i40evf_adapter *adapter)
600{
601 struct i40e_hw *hw = &adapter->hw;
602 struct net_device *netdev = adapter->netdev;
603 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
604 int i;
605 int rx_buf_len;
606
607
608 adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
609 adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
610
611 /* Decide whether to use packet split mode or not */
612 if (netdev->mtu > ETH_DATA_LEN) {
613 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
614 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
615 else
616 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
617 } else {
618 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
619 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
620 else
621 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
622 }
623
624 /* Set the RX buffer length according to the mode */
625 if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
626 rx_buf_len = I40E_RX_HDR_SIZE;
627 } else {
628 if (netdev->mtu <= ETH_DATA_LEN)
629 rx_buf_len = I40EVF_RXBUFFER_2048;
630 else
631 rx_buf_len = ALIGN(max_frame, 1024);
632 }
633
cc052927 634 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5
GR		 635 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
636 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
637 }
638}
639
640/**
641 * i40evf_find_vlan - Search filter list for specific vlan filter
642 * @adapter: board private structure
643 * @vlan: vlan tag
644 *
645 * Returns ptr to the filter object or NULL
646 **/
647static struct
648i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
649{
650 struct i40evf_vlan_filter *f;
651
652 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
653 if (vlan == f->vlan)
654 return f;
655 }
656 return NULL;
657}
658
659/**
660 * i40evf_add_vlan - Add a vlan filter to the list
661 * @adapter: board private structure
662 * @vlan: VLAN tag
663 *
664 * Returns ptr to the filter object or NULL when no memory available.
665 **/
666static struct
667i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
668{
669 struct i40evf_vlan_filter *f;
670
671 f = i40evf_find_vlan(adapter, vlan);
348d4994 672 if (!f) {
5eae00c5 673 f = kzalloc(sizeof(*f), GFP_ATOMIC);
348d4994 674 if (!f)
5eae00c5 675 return NULL;
249c8b8d 676
5eae00c5
GR		 677 f->vlan = vlan;
678
679 INIT_LIST_HEAD(&f->list);
680 list_add(&f->list, &adapter->vlan_filter_list);
681 f->add = true;
682 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
683 }
684
685 return f;
686}
687
688/**
689 * i40evf_del_vlan - Remove a vlan filter from the list
690 * @adapter: board private structure
691 * @vlan: VLAN tag
692 **/
693static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
694{
695 struct i40evf_vlan_filter *f;
696
697 f = i40evf_find_vlan(adapter, vlan);
698 if (f) {
699 f->remove = true;
700 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
701 }
5eae00c5
GR		 702}
703
704/**
705 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
706 * @netdev: network device struct
707 * @vid: VLAN tag
708 **/
709static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
75a64435 710 __always_unused __be16 proto, u16 vid)
5eae00c5
GR		 711{
712 struct i40evf_adapter *adapter = netdev_priv(netdev);
713
714 if (i40evf_add_vlan(adapter, vid) == NULL)
715 return -ENOMEM;
716 return 0;
717}
718
719/**
720 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
721 * @netdev: network device struct
722 * @vid: VLAN tag
723 **/
724static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
75a64435 725 __always_unused __be16 proto, u16 vid)
5eae00c5
GR		 726{
727 struct i40evf_adapter *adapter = netdev_priv(netdev);
728
729 i40evf_del_vlan(adapter, vid);
730 return 0;
731}
732
733/**
734 * i40evf_find_filter - Search filter list for specific mac filter
735 * @adapter: board private structure
736 * @macaddr: the MAC address
737 *
738 * Returns ptr to the filter object or NULL
739 **/
740static struct
741i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
742 u8 *macaddr)
743{
744 struct i40evf_mac_filter *f;
745
746 if (!macaddr)
747 return NULL;
748
749 list_for_each_entry(f, &adapter->mac_filter_list, list) {
750 if (ether_addr_equal(macaddr, f->macaddr))
751 return f;
752 }
753 return NULL;
754}
755
756/**
757 * i40e_add_filter - Add a mac filter to the filter list
758 * @adapter: board private structure
759 * @macaddr: the MAC address
760 *
761 * Returns ptr to the filter object or NULL when no memory available.
762 **/
763static struct
764i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
765 u8 *macaddr)
766{
767 struct i40evf_mac_filter *f;
768
769 if (!macaddr)
770 return NULL;
771
772 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
773 &adapter->crit_section))
b65476cd 774 udelay(1);
5eae00c5
GR		 775
776 f = i40evf_find_filter(adapter, macaddr);
348d4994 777 if (!f) {
5eae00c5 778 f = kzalloc(sizeof(*f), GFP_ATOMIC);
348d4994 779 if (!f) {
5eae00c5
GR		 780 clear_bit(__I40EVF_IN_CRITICAL_TASK,
781 &adapter->crit_section);
782 return NULL;
783 }
784
9a173901 785 ether_addr_copy(f->macaddr, macaddr);
5eae00c5
GR		 786
787 list_add(&f->list, &adapter->mac_filter_list);
788 f->add = true;
789 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
790 }
791
792 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
793 return f;
794}
795
796/**
797 * i40evf_set_mac - NDO callback to set port mac address
798 * @netdev: network interface device structure
799 * @p: pointer to an address structure
800 *
801 * Returns 0 on success, negative on failure
802 **/
803static int i40evf_set_mac(struct net_device *netdev, void *p)
804{
805 struct i40evf_adapter *adapter = netdev_priv(netdev);
806 struct i40e_hw *hw = &adapter->hw;
807 struct i40evf_mac_filter *f;
808 struct sockaddr *addr = p;
809
810 if (!is_valid_ether_addr(addr->sa_data))
811 return -EADDRNOTAVAIL;
812
813 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
814 return 0;
815
816 f = i40evf_add_filter(adapter, addr->sa_data);
817 if (f) {
9a173901
GR		 818 ether_addr_copy(hw->mac.addr, addr->sa_data);
819 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
5eae00c5
GR		 820 }
821
822 return (f == NULL) ? -ENOMEM : 0;
823}
824
825/**
826 * i40evf_set_rx_mode - NDO callback to set the netdev filters
827 * @netdev: network interface device structure
828 **/
829static void i40evf_set_rx_mode(struct net_device *netdev)
830{
831 struct i40evf_adapter *adapter = netdev_priv(netdev);
832 struct i40evf_mac_filter *f, *ftmp;
833 struct netdev_hw_addr *uca;
834 struct netdev_hw_addr *mca;
835
836 /* add addr if not already in the filter list */
837 netdev_for_each_uc_addr(uca, netdev) {
838 i40evf_add_filter(adapter, uca->addr);
839 }
840 netdev_for_each_mc_addr(mca, netdev) {
841 i40evf_add_filter(adapter, mca->addr);
842 }
843
844 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
845 &adapter->crit_section))
b65476cd 846 udelay(1);
5eae00c5
GR		 847 /* remove filter if not in netdev list */
848 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
849 bool found = false;
850
dc5f2de6 851 if (is_multicast_ether_addr(f->macaddr)) {
5eae00c5
GR		 852 netdev_for_each_mc_addr(mca, netdev) {
853 if (ether_addr_equal(mca->addr, f->macaddr)) {
854 found = true;
855 break;
856 }
857 }
858 } else {
859 netdev_for_each_uc_addr(uca, netdev) {
860 if (ether_addr_equal(uca->addr, f->macaddr)) {
861 found = true;
862 break;
863 }
864 }
865 }
866 if (found) {
867 f->remove = true;
868 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
869 }
870 }
871 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
872}
873
874/**
875 * i40evf_napi_enable_all - enable NAPI on all queue vectors
876 * @adapter: board private structure
877 **/
878static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
879{
880 int q_idx;
881 struct i40e_q_vector *q_vector;
882 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
883
884 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
885 struct napi_struct *napi;
75a64435 886
5eae00c5
GR		 887 q_vector = adapter->q_vector[q_idx];
888 napi = &q_vector->napi;
889 napi_enable(napi);
890 }
891}
892
893/**
894 * i40evf_napi_disable_all - disable NAPI on all queue vectors
895 * @adapter: board private structure
896 **/
897static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
898{
899 int q_idx;
900 struct i40e_q_vector *q_vector;
901 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
902
903 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
904 q_vector = adapter->q_vector[q_idx];
905 napi_disable(&q_vector->napi);
906 }
907}
908
909/**
910 * i40evf_configure - set up transmit and receive data structures
911 * @adapter: board private structure
912 **/
913static void i40evf_configure(struct i40evf_adapter *adapter)
914{
915 struct net_device *netdev = adapter->netdev;
916 int i;
917
918 i40evf_set_rx_mode(netdev);
919
920 i40evf_configure_tx(adapter);
921 i40evf_configure_rx(adapter);
922 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
923
cc052927 924 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5 925 struct i40e_ring *ring = adapter->rx_rings[i];
75a64435 926
5eae00c5
GR		 927 i40evf_alloc_rx_buffers(ring, ring->count);
928 ring->next_to_use = ring->count - 1;
929 writel(ring->next_to_use, ring->tail);
930 }
931}
932
933/**
934 * i40evf_up_complete - Finish the last steps of bringing up a connection
935 * @adapter: board private structure
936 **/
937static int i40evf_up_complete(struct i40evf_adapter *adapter)
938{
939 adapter->state = __I40EVF_RUNNING;
940 clear_bit(__I40E_DOWN, &adapter->vsi.state);
941
942 i40evf_napi_enable_all(adapter);
943
944 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
945 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
946 return 0;
947}
948
5eae00c5
GR		 949/**
950 * i40e_down - Shutdown the connection processing
951 * @adapter: board private structure
952 **/
953void i40evf_down(struct i40evf_adapter *adapter)
954{
955 struct net_device *netdev = adapter->netdev;
956 struct i40evf_mac_filter *f;
957
ddf0b3a6
MW		 958 if (adapter->state == __I40EVF_DOWN)
959 return;
960
53d0b3ae
MW		 961 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
962 &adapter->crit_section))
963 usleep_range(500, 1000);
964
965 i40evf_irq_disable(adapter);
966
ef8693eb 967 /* remove all MAC filters */
5eae00c5
GR		 968 list_for_each_entry(f, &adapter->mac_filter_list, list) {
969 f->remove = true;
970 }
ed1f5b58
MW		 971 /* remove all VLAN filters */
972 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
973 f->remove = true;
974 }
ef8693eb
MW		 975 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
976 adapter->state != __I40EVF_RESETTING) {
53d0b3ae
MW		 977 /* cancel any current operation */
978 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
979 adapter->aq_pending = 0;
980 /* Schedule operations to close down the HW. Don't wait
981 * here for this to complete. The watchdog is still running
982 * and it will take care of this.
983 */
984 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
ed1f5b58 985 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
ef8693eb 986 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
ef8693eb 987 }
5eae00c5
GR		 988 netif_tx_disable(netdev);
989
990 netif_tx_stop_all_queues(netdev);
991
5eae00c5
GR		 992 i40evf_napi_disable_all(adapter);
993
53d0b3ae
MW		 994 msleep(20);
995
5eae00c5 996 netif_carrier_off(netdev);
53d0b3ae 997 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
5eae00c5
GR		 998}
999
1000/**
1001 * i40evf_acquire_msix_vectors - Setup the MSIX capability
1002 * @adapter: board private structure
1003 * @vectors: number of vectors to request
1004 *
1005 * Work with the OS to set up the MSIX vectors needed.
1006 *
1007 * Returns 0 on success, negative on failure
1008 **/
1009static int
1010i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1011{
1012 int err, vector_threshold;
1013
1014 /* We'll want at least 3 (vector_threshold):
1015 * 0) Other (Admin Queue and link, mostly)
1016 * 1) TxQ[0] Cleanup
1017 * 2) RxQ[0] Cleanup
1018 */
1019 vector_threshold = MIN_MSIX_COUNT;
1020
1021 /* The more we get, the more we will assign to Tx/Rx Cleanup
1022 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1023 * Right now, we simply care about how many we'll get; we'll
1024 * set them up later while requesting irq's.
1025 */
fc2f2f5d
AG		 1026 err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1027 vector_threshold, vectors);
1028 if (err < 0) {
80e72893 1029 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
5eae00c5
GR		 1030 kfree(adapter->msix_entries);
1031 adapter->msix_entries = NULL;
fc2f2f5d 1032 return err;
5eae00c5 1033 }
fc2f2f5d
AG		 1034
1035 /* Adjust for only the vectors we'll use, which is minimum
1036 * of max_msix_q_vectors + NONQ_VECS, or the number of
1037 * vectors we were allocated.
1038 */
1039 adapter->num_msix_vectors = err;
1040 return 0;
5eae00c5
GR		 1041}
1042
1043/**
1044 * i40evf_free_queues - Free memory for all rings
1045 * @adapter: board private structure to initialize
1046 *
1047 * Free all of the memory associated with queue pairs.
1048 **/
1049static void i40evf_free_queues(struct i40evf_adapter *adapter)
1050{
1051 int i;
1052
1053 if (!adapter->vsi_res)
1054 return;
cc052927 1055 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5
GR		 1056 if (adapter->tx_rings[i])
1057 kfree_rcu(adapter->tx_rings[i], rcu);
1058 adapter->tx_rings[i] = NULL;
1059 adapter->rx_rings[i] = NULL;
1060 }
1061}
1062
1063/**
1064 * i40evf_alloc_queues - Allocate memory for all rings
1065 * @adapter: board private structure to initialize
1066 *
1067 * We allocate one ring per queue at run-time since we don't know the
1068 * number of queues at compile-time. The polling_netdev array is
1069 * intended for Multiqueue, but should work fine with a single queue.
1070 **/
1071static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1072{
1073 int i;
1074
cc052927 1075 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5
GR		 1076 struct i40e_ring *tx_ring;
1077 struct i40e_ring *rx_ring;
1078
75a64435 1079 tx_ring = kzalloc(sizeof(*tx_ring) * 2, GFP_KERNEL);
5eae00c5
GR		 1080 if (!tx_ring)
1081 goto err_out;
1082
1083 tx_ring->queue_index = i;
1084 tx_ring->netdev = adapter->netdev;
1085 tx_ring->dev = &adapter->pdev->dev;
d732a184 1086 tx_ring->count = adapter->tx_desc_count;
5eae00c5
GR		 1087 adapter->tx_rings[i] = tx_ring;
1088
1089 rx_ring = &tx_ring[1];
1090 rx_ring->queue_index = i;
1091 rx_ring->netdev = adapter->netdev;
1092 rx_ring->dev = &adapter->pdev->dev;
d732a184 1093 rx_ring->count = adapter->rx_desc_count;
5eae00c5
GR		 1094 adapter->rx_rings[i] = rx_ring;
1095 }
1096
1097 return 0;
1098
1099err_out:
1100 i40evf_free_queues(adapter);
1101 return -ENOMEM;
1102}
1103
1104/**
1105 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1106 * @adapter: board private structure to initialize
1107 *
1108 * Attempt to configure the interrupts using the best available
1109 * capabilities of the hardware and the kernel.
1110 **/
1111static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1112{
1113 int vector, v_budget;
1114 int pairs = 0;
1115 int err = 0;
1116
1117 if (!adapter->vsi_res) {
1118 err = -EIO;
1119 goto out;
1120 }
cc052927 1121 pairs = adapter->num_active_queues;
5eae00c5
GR		 1122
1123 /* It's easy to be greedy for MSI-X vectors, but it really
1124 * doesn't do us much good if we have a lot more vectors
1125 * than CPU's. So let's be conservative and only ask for
1126 * (roughly) twice the number of vectors as there are CPU's.
1127 */
30a500e2
MW		 1128 v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1129 v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
5eae00c5 1130
5eae00c5
GR		 1131 adapter->msix_entries = kcalloc(v_budget,
1132 sizeof(struct msix_entry), GFP_KERNEL);
1133 if (!adapter->msix_entries) {
1134 err = -ENOMEM;
1135 goto out;
1136 }
1137
1138 for (vector = 0; vector < v_budget; vector++)
1139 adapter->msix_entries[vector].entry = vector;
1140
1141 i40evf_acquire_msix_vectors(adapter, v_budget);
1142
1143out:
1144 adapter->netdev->real_num_tx_queues = pairs;
1145 return err;
1146}
1147
1148/**
1149 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1150 * @adapter: board private structure to initialize
1151 *
1152 * We allocate one q_vector per queue interrupt. If allocation fails we
1153 * return -ENOMEM.
1154 **/
1155static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1156{
1157 int q_idx, num_q_vectors;
1158 struct i40e_q_vector *q_vector;
1159
1160 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1161
1162 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
75a64435 1163 q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL);
5eae00c5
GR		 1164 if (!q_vector)
1165 goto err_out;
1166 q_vector->adapter = adapter;
1167 q_vector->vsi = &adapter->vsi;
1168 q_vector->v_idx = q_idx;
1169 netif_napi_add(adapter->netdev, &q_vector->napi,
75a64435 1170 i40evf_napi_poll, NAPI_POLL_WEIGHT);
5eae00c5
GR		 1171 adapter->q_vector[q_idx] = q_vector;
1172 }
1173
1174 return 0;
1175
1176err_out:
1177 while (q_idx) {
1178 q_idx--;
1179 q_vector = adapter->q_vector[q_idx];
1180 netif_napi_del(&q_vector->napi);
1181 kfree(q_vector);
1182 adapter->q_vector[q_idx] = NULL;
1183 }
1184 return -ENOMEM;
1185}
1186
1187/**
1188 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1189 * @adapter: board private structure to initialize
1190 *
1191 * This function frees the memory allocated to the q_vectors. In addition if
1192 * NAPI is enabled it will delete any references to the NAPI struct prior
1193 * to freeing the q_vector.
1194 **/
1195static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1196{
1197 int q_idx, num_q_vectors;
1198 int napi_vectors;
1199
1200 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
cc052927 1201 napi_vectors = adapter->num_active_queues;
5eae00c5
GR		 1202
1203 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1204 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1205
1206 adapter->q_vector[q_idx] = NULL;
1207 if (q_idx < napi_vectors)
1208 netif_napi_del(&q_vector->napi);
1209 kfree(q_vector);
1210 }
1211}
1212
1213/**
1214 * i40evf_reset_interrupt_capability - Reset MSIX setup
1215 * @adapter: board private structure
1216 *
1217 **/
1218void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1219{
1220 pci_disable_msix(adapter->pdev);
1221 kfree(adapter->msix_entries);
1222 adapter->msix_entries = NULL;
5eae00c5
GR		 1223}
1224
1225/**
1226 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1227 * @adapter: board private structure to initialize
1228 *
1229 **/
1230int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1231{
1232 int err;
1233
1234 err = i40evf_set_interrupt_capability(adapter);
1235 if (err) {
1236 dev_err(&adapter->pdev->dev,
1237 "Unable to setup interrupt capabilities\n");
1238 goto err_set_interrupt;
1239 }
1240
1241 err = i40evf_alloc_q_vectors(adapter);
1242 if (err) {
1243 dev_err(&adapter->pdev->dev,
1244 "Unable to allocate memory for queue vectors\n");
1245 goto err_alloc_q_vectors;
1246 }
1247
1248 err = i40evf_alloc_queues(adapter);
1249 if (err) {
1250 dev_err(&adapter->pdev->dev,
1251 "Unable to allocate memory for queues\n");
1252 goto err_alloc_queues;
1253 }
1254
1255 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
75a64435
MW		 1256 (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1257 adapter->num_active_queues);
5eae00c5
GR		 1258
1259 return 0;
1260err_alloc_queues:
1261 i40evf_free_q_vectors(adapter);
1262err_alloc_q_vectors:
1263 i40evf_reset_interrupt_capability(adapter);
1264err_set_interrupt:
1265 return err;
1266}
1267
1268/**
1269 * i40evf_watchdog_timer - Periodic call-back timer
1270 * @data: pointer to adapter disguised as unsigned long
1271 **/
1272static void i40evf_watchdog_timer(unsigned long data)
1273{
1274 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
75a64435 1275
5eae00c5
GR		 1276 schedule_work(&adapter->watchdog_task);
1277 /* timer will be rescheduled in watchdog task */
1278}
1279
1280/**
1281 * i40evf_watchdog_task - Periodic call-back task
1282 * @work: pointer to work_struct
1283 **/
1284static void i40evf_watchdog_task(struct work_struct *work)
1285{
1286 struct i40evf_adapter *adapter = container_of(work,
75a64435
MW		 1287 struct i40evf_adapter,
1288 watchdog_task);
5eae00c5 1289 struct i40e_hw *hw = &adapter->hw;
fd35886a 1290 uint32_t rstat_val;
5eae00c5 1291
ef8693eb
MW		 1292 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1293 goto restart_watchdog;
1294
1295 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
fd35886a
AS		 1296 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1297 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1298 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1299 (rstat_val == I40E_VFR_COMPLETED)) {
ef8693eb
MW		 1300 /* A chance for redemption! */
1301 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1302 adapter->state = __I40EVF_STARTUP;
1303 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1304 schedule_delayed_work(&adapter->init_task, 10);
1305 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1306 &adapter->crit_section);
1307 /* Don't reschedule the watchdog, since we've restarted
1308 * the init task. When init_task contacts the PF and
1309 * gets everything set up again, it'll restart the
1310 * watchdog for us. Down, boy. Sit. Stay. Woof.
1311 */
1312 return;
1313 }
1314 adapter->aq_pending = 0;
1315 adapter->aq_required = 0;
1316 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5 1317 goto watchdog_done;
ef8693eb 1318 }
5eae00c5 1319
ef8693eb
MW		 1320 if ((adapter->state < __I40EVF_DOWN) ||
1321 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
5eae00c5
GR		 1322 goto watchdog_done;
1323
ef8693eb 1324 /* check for reset */
fd35886a 1325 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
75a64435 1326 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
ef8693eb 1327 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
fd35886a
AS		 1328 (rstat_val != I40E_VFR_VFACTIVE) &&
1329 (rstat_val != I40E_VFR_COMPLETED)) {
5eae00c5 1330 adapter->state = __I40EVF_RESETTING;
ef8693eb 1331 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
249c8b8d 1332 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
5eae00c5 1333 schedule_work(&adapter->reset_task);
ef8693eb
MW		 1334 adapter->aq_pending = 0;
1335 adapter->aq_required = 0;
1336 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 1337 goto watchdog_done;
1338 }
1339
1340 /* Process admin queue tasks. After init, everything gets done
1341 * here so we don't race on the admin queue.
1342 */
1343 if (adapter->aq_pending)
1344 goto watchdog_done;
1345
1346 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1347 i40evf_map_queues(adapter);
1348 goto watchdog_done;
1349 }
1350
1351 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1352 i40evf_add_ether_addrs(adapter);
1353 goto watchdog_done;
1354 }
1355
1356 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1357 i40evf_add_vlans(adapter);
1358 goto watchdog_done;
1359 }
1360
1361 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1362 i40evf_del_ether_addrs(adapter);
1363 goto watchdog_done;
1364 }
1365
1366 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1367 i40evf_del_vlans(adapter);
1368 goto watchdog_done;
1369 }
1370
1371 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1372 i40evf_disable_queues(adapter);
1373 goto watchdog_done;
1374 }
1375
1376 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1377 i40evf_configure_queues(adapter);
1378 goto watchdog_done;
1379 }
1380
1381 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1382 i40evf_enable_queues(adapter);
1383 goto watchdog_done;
1384 }
1385
1386 if (adapter->state == __I40EVF_RUNNING)
1387 i40evf_request_stats(adapter);
1388
1389 i40evf_irq_enable(adapter, true);
1390 i40evf_fire_sw_int(adapter, 0xFF);
ef8693eb 1391
5eae00c5 1392watchdog_done:
ef8693eb
MW		 1393 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1394restart_watchdog:
d3e2edb7
AS		 1395 if (adapter->state == __I40EVF_REMOVE)
1396 return;
5eae00c5
GR		 1397 if (adapter->aq_required)
1398 mod_timer(&adapter->watchdog_timer,
1399 jiffies + msecs_to_jiffies(20));
1400 else
1401 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
5eae00c5
GR		 1402 schedule_work(&adapter->adminq_task);
1403}
1404
5b7af02c 1405/**
3dd5550f 1406 * next_queue - increment to next available tx queue
5b7af02c
MW		 1407 * @adapter: board private structure
1408 * @j: queue counter
1409 *
1410 * Helper function for RSS programming to increment through available
1411 * queus. Returns the next queue value.
1412 **/
96d47704
MW		 1413static int next_queue(struct i40evf_adapter *adapter, int j)
1414{
1415 j += 1;
1416
cc052927 1417 return j >= adapter->num_active_queues ? 0 : j;
96d47704
MW		 1418}
1419
5eae00c5
GR		 1420/**
1421 * i40evf_configure_rss - Prepare for RSS if used
1422 * @adapter: board private structure
1423 **/
1424static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1425{
22f258a1 1426 u32 rss_key[I40E_VFQF_HKEY_MAX_INDEX + 1];
5eae00c5
GR		 1427 struct i40e_hw *hw = &adapter->hw;
1428 u32 lut = 0;
1429 int i, j;
1430 u64 hena;
1431
cc052927
MW		 1432 /* No RSS for single queue. */
1433 if (adapter->num_active_queues == 1) {
1434 wr32(hw, I40E_VFQF_HENA(0), 0);
1435 wr32(hw, I40E_VFQF_HENA(1), 0);
1436 return;
1437 }
5eae00c5 1438
cc052927 1439 /* Hash type is configured by the PF - we just supply the key */
22f258a1 1440 netdev_rss_key_fill(rss_key, sizeof(rss_key));
5eae00c5 1441 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
22f258a1 1442 wr32(hw, I40E_VFQF_HKEY(i), rss_key[i]);
5eae00c5
GR		 1443
1444 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1445 hena = I40E_DEFAULT_RSS_HENA;
1446 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1447 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1448
1449 /* Populate the LUT with max no. of queues in round robin fashion */
cc052927 1450 j = adapter->num_active_queues;
96d47704 1451 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
5b7af02c
MW		 1452 j = next_queue(adapter, j);
1453 lut = j;
1454 j = next_queue(adapter, j);
1455 lut |= j << 8;
1456 j = next_queue(adapter, j);
1457 lut |= j << 16;
1458 j = next_queue(adapter, j);
1459 lut |= j << 24;
96d47704 1460 wr32(hw, I40E_VFQF_HLUT(i), lut);
5eae00c5
GR		 1461 }
1462 i40e_flush(hw);
1463}
1464
ef8693eb
MW		 1465#define I40EVF_RESET_WAIT_MS 100
1466#define I40EVF_RESET_WAIT_COUNT 200
5eae00c5
GR		 1467/**
1468 * i40evf_reset_task - Call-back task to handle hardware reset
1469 * @work: pointer to work_struct
1470 *
1471 * During reset we need to shut down and reinitialize the admin queue
1472 * before we can use it to communicate with the PF again. We also clear
1473 * and reinit the rings because that context is lost as well.
1474 **/
1475static void i40evf_reset_task(struct work_struct *work)
1476{
ef8693eb
MW		 1477 struct i40evf_adapter *adapter = container_of(work,
1478 struct i40evf_adapter,
1479 reset_task);
5eae00c5
GR		 1480 struct i40e_hw *hw = &adapter->hw;
1481 int i = 0, err;
1482 uint32_t rstat_val;
1483
1484 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1485 &adapter->crit_section))
f98a2006 1486 usleep_range(500, 1000);
3526d800
MW		 1487
1488 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1489 dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
1490 i40evf_request_reset(adapter);
1491 }
1492
ef8693eb
MW		 1493 /* poll until we see the reset actually happen */
1494 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1495 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1496 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
fd35886a
AS		 1497 if ((rstat_val != I40E_VFR_VFACTIVE) &&
1498 (rstat_val != I40E_VFR_COMPLETED))
ef8693eb 1499 break;
c88e38cc 1500 msleep(I40EVF_RESET_WAIT_MS);
ef8693eb
MW		 1501 }
1502 if (i == I40EVF_RESET_WAIT_COUNT) {
ef8693eb
MW		 1503 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1504 goto continue_reset; /* act like the reset happened */
1505 }
5eae00c5 1506
ef8693eb
MW		 1507 /* wait until the reset is complete and the PF is responding to us */
1508 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
5eae00c5
GR		 1509 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1510 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
fd35886a
AS		 1511 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1512 (rstat_val == I40E_VFR_COMPLETED))
5eae00c5 1513 break;
c88e38cc 1514 msleep(I40EVF_RESET_WAIT_MS);
5eae00c5 1515 }
ef8693eb 1516 if (i == I40EVF_RESET_WAIT_COUNT) {
6ba36a24
MW		 1517 struct i40evf_mac_filter *f, *ftmp;
1518 struct i40evf_vlan_filter *fv, *fvtmp;
1519
5eae00c5 1520 /* reset never finished */
80e72893 1521 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
ef8693eb
MW		 1522 rstat_val);
1523 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1524
169f4076
MW		 1525 if (netif_running(adapter->netdev)) {
1526 set_bit(__I40E_DOWN, &adapter->vsi.state);
1527 i40evf_down(adapter);
1528 i40evf_free_traffic_irqs(adapter);
1529 i40evf_free_all_tx_resources(adapter);
1530 i40evf_free_all_rx_resources(adapter);
1531 }
6ba36a24
MW		 1532
1533 /* Delete all of the filters, both MAC and VLAN. */
1534 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1535 list) {
1536 list_del(&f->list);
1537 kfree(f);
1538 }
1539 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1540 list) {
1541 list_del(&fv->list);
1542 kfree(fv);
1543 }
1544
ef8693eb
MW		 1545 i40evf_free_misc_irq(adapter);
1546 i40evf_reset_interrupt_capability(adapter);
1547 i40evf_free_queues(adapter);
d31944d6 1548 i40evf_free_q_vectors(adapter);
ef8693eb
MW		 1549 kfree(adapter->vf_res);
1550 i40evf_shutdown_adminq(hw);
1551 adapter->netdev->flags &= ~IFF_UP;
1552 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1553 return; /* Do not attempt to reinit. It's dead, Jim. */
5eae00c5 1554 }
ef8693eb
MW		 1555
1556continue_reset:
1557 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1558
5eae00c5
GR		 1559 i40evf_down(adapter);
1560 adapter->state = __I40EVF_RESETTING;
1561
1562 /* kill and reinit the admin queue */
1563 if (i40evf_shutdown_adminq(hw))
1564 dev_warn(&adapter->pdev->dev,
75a64435
MW		 1565 "%s: Failed to destroy the Admin Queue resources\n",
1566 __func__);
5eae00c5
GR		 1567 err = i40evf_init_adminq(hw);
1568 if (err)
1569 dev_info(&adapter->pdev->dev, "%s: init_adminq failed: %d\n",
75a64435 1570 __func__, err);
5eae00c5
GR		 1571
1572 adapter->aq_pending = 0;
1573 adapter->aq_required = 0;
1574 i40evf_map_queues(adapter);
1575 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1576
1577 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1578
1579 if (netif_running(adapter->netdev)) {
1580 /* allocate transmit descriptors */
1581 err = i40evf_setup_all_tx_resources(adapter);
1582 if (err)
1583 goto reset_err;
1584
1585 /* allocate receive descriptors */
1586 err = i40evf_setup_all_rx_resources(adapter);
1587 if (err)
1588 goto reset_err;
1589
1590 i40evf_configure(adapter);
1591
1592 err = i40evf_up_complete(adapter);
1593 if (err)
1594 goto reset_err;
1595
1596 i40evf_irq_enable(adapter, true);
1597 }
1598 return;
1599reset_err:
80e72893 1600 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
5eae00c5
GR		 1601 i40evf_close(adapter->netdev);
1602}
1603
1604/**
1605 * i40evf_adminq_task - worker thread to clean the admin queue
1606 * @work: pointer to work_struct containing our data
1607 **/
1608static void i40evf_adminq_task(struct work_struct *work)
1609{
1610 struct i40evf_adapter *adapter =
1611 container_of(work, struct i40evf_adapter, adminq_task);
1612 struct i40e_hw *hw = &adapter->hw;
1613 struct i40e_arq_event_info event;
1614 struct i40e_virtchnl_msg *v_msg;
1615 i40e_status ret;
912257e5 1616 u32 val, oldval;
5eae00c5
GR		 1617 u16 pending;
1618
ef8693eb
MW		 1619 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1620 return;
1621
1001dc37
MW		 1622 event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1623 event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
249c8b8d 1624 if (!event.msg_buf)
5eae00c5 1625 return;
249c8b8d 1626
5eae00c5
GR		 1627 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1628 do {
1629 ret = i40evf_clean_arq_element(hw, &event, &pending);
1630 if (ret)
1631 break; /* No event to process or error cleaning ARQ */
1632
1633 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1634 v_msg->v_retval, event.msg_buf,
1001dc37 1635 event.msg_len);
75a64435 1636 if (pending != 0)
5eae00c5 1637 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
5eae00c5
GR		 1638 } while (pending);
1639
912257e5
MW		 1640 /* check for error indications */
1641 val = rd32(hw, hw->aq.arq.len);
1642 oldval = val;
1643 if (val & I40E_VF_ARQLEN_ARQVFE_MASK) {
1644 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1645 val &= ~I40E_VF_ARQLEN_ARQVFE_MASK;
1646 }
1647 if (val & I40E_VF_ARQLEN_ARQOVFL_MASK) {
1648 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1649 val &= ~I40E_VF_ARQLEN_ARQOVFL_MASK;
1650 }
1651 if (val & I40E_VF_ARQLEN_ARQCRIT_MASK) {
1652 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1653 val &= ~I40E_VF_ARQLEN_ARQCRIT_MASK;
1654 }
1655 if (oldval != val)
1656 wr32(hw, hw->aq.arq.len, val);
1657
1658 val = rd32(hw, hw->aq.asq.len);
1659 oldval = val;
1660 if (val & I40E_VF_ATQLEN_ATQVFE_MASK) {
1661 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1662 val &= ~I40E_VF_ATQLEN_ATQVFE_MASK;
1663 }
1664 if (val & I40E_VF_ATQLEN_ATQOVFL_MASK) {
1665 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1666 val &= ~I40E_VF_ATQLEN_ATQOVFL_MASK;
1667 }
1668 if (val & I40E_VF_ATQLEN_ATQCRIT_MASK) {
1669 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1670 val &= ~I40E_VF_ATQLEN_ATQCRIT_MASK;
1671 }
1672 if (oldval != val)
1673 wr32(hw, hw->aq.asq.len, val);
1674
5eae00c5
GR		 1675 /* re-enable Admin queue interrupt cause */
1676 i40evf_misc_irq_enable(adapter);
1677
1678 kfree(event.msg_buf);
1679}
1680
1681/**
1682 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1683 * @adapter: board private structure
1684 *
1685 * Free all transmit software resources
1686 **/
1687static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1688{
1689 int i;
1690
cc052927 1691 for (i = 0; i < adapter->num_active_queues; i++)
5eae00c5
GR		 1692 if (adapter->tx_rings[i]->desc)
1693 i40evf_free_tx_resources(adapter->tx_rings[i]);
5eae00c5
GR		 1694}
1695
1696/**
1697 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1698 * @adapter: board private structure
1699 *
1700 * If this function returns with an error, then it's possible one or
1701 * more of the rings is populated (while the rest are not). It is the
1702 * callers duty to clean those orphaned rings.
1703 *
1704 * Return 0 on success, negative on failure
1705 **/
1706static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1707{
1708 int i, err = 0;
1709
cc052927 1710 for (i = 0; i < adapter->num_active_queues; i++) {
d732a184 1711 adapter->tx_rings[i]->count = adapter->tx_desc_count;
5eae00c5
GR		 1712 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1713 if (!err)
1714 continue;
1715 dev_err(&adapter->pdev->dev,
1716 "%s: Allocation for Tx Queue %u failed\n",
1717 __func__, i);
1718 break;
1719 }
1720
1721 return err;
1722}
1723
1724/**
1725 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1726 * @adapter: board private structure
1727 *
1728 * If this function returns with an error, then it's possible one or
1729 * more of the rings is populated (while the rest are not). It is the
1730 * callers duty to clean those orphaned rings.
1731 *
1732 * Return 0 on success, negative on failure
1733 **/
1734static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1735{
1736 int i, err = 0;
1737
cc052927 1738 for (i = 0; i < adapter->num_active_queues; i++) {
d732a184 1739 adapter->rx_rings[i]->count = adapter->rx_desc_count;
5eae00c5
GR		 1740 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1741 if (!err)
1742 continue;
1743 dev_err(&adapter->pdev->dev,
1744 "%s: Allocation for Rx Queue %u failed\n",
1745 __func__, i);
1746 break;
1747 }
1748 return err;
1749}
1750
1751/**
1752 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1753 * @adapter: board private structure
1754 *
1755 * Free all receive software resources
1756 **/
1757static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1758{
1759 int i;
1760
cc052927 1761 for (i = 0; i < adapter->num_active_queues; i++)
5eae00c5
GR		 1762 if (adapter->rx_rings[i]->desc)
1763 i40evf_free_rx_resources(adapter->rx_rings[i]);
1764}
1765
1766/**
1767 * i40evf_open - Called when a network interface is made active
1768 * @netdev: network interface device structure
1769 *
1770 * Returns 0 on success, negative value on failure
1771 *
1772 * The open entry point is called when a network interface is made
1773 * active by the system (IFF_UP). At this point all resources needed
1774 * for transmit and receive operations are allocated, the interrupt
1775 * handler is registered with the OS, the watchdog timer is started,
1776 * and the stack is notified that the interface is ready.
1777 **/
1778static int i40evf_open(struct net_device *netdev)
1779{
1780 struct i40evf_adapter *adapter = netdev_priv(netdev);
1781 int err;
1782
ef8693eb
MW		 1783 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1784 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1785 return -EIO;
1786 }
5eae00c5
GR		 1787 if (adapter->state != __I40EVF_DOWN)
1788 return -EBUSY;
1789
1790 /* allocate transmit descriptors */
1791 err = i40evf_setup_all_tx_resources(adapter);
1792 if (err)
1793 goto err_setup_tx;
1794
1795 /* allocate receive descriptors */
1796 err = i40evf_setup_all_rx_resources(adapter);
1797 if (err)
1798 goto err_setup_rx;
1799
1800 /* clear any pending interrupts, may auto mask */
1801 err = i40evf_request_traffic_irqs(adapter, netdev->name);
1802 if (err)
1803 goto err_req_irq;
1804
1805 i40evf_configure(adapter);
1806
1807 err = i40evf_up_complete(adapter);
1808 if (err)
1809 goto err_req_irq;
1810
1811 i40evf_irq_enable(adapter, true);
1812
1813 return 0;
1814
1815err_req_irq:
1816 i40evf_down(adapter);
1817 i40evf_free_traffic_irqs(adapter);
1818err_setup_rx:
1819 i40evf_free_all_rx_resources(adapter);
1820err_setup_tx:
1821 i40evf_free_all_tx_resources(adapter);
1822
1823 return err;
1824}
1825
1826/**
1827 * i40evf_close - Disables a network interface
1828 * @netdev: network interface device structure
1829 *
1830 * Returns 0, this is not allowed to fail
1831 *
1832 * The close entry point is called when an interface is de-activated
1833 * by the OS. The hardware is still under the drivers control, but
1834 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1835 * are freed, along with all transmit and receive resources.
1836 **/
1837static int i40evf_close(struct net_device *netdev)
1838{
1839 struct i40evf_adapter *adapter = netdev_priv(netdev);
1840
ef8693eb
MW		 1841 if (adapter->state <= __I40EVF_DOWN)
1842 return 0;
1843
ef8693eb 1844
5eae00c5
GR		 1845 set_bit(__I40E_DOWN, &adapter->vsi.state);
1846
1847 i40evf_down(adapter);
ddf0b3a6 1848 adapter->state = __I40EVF_DOWN;
5eae00c5
GR		 1849 i40evf_free_traffic_irqs(adapter);
1850
1851 i40evf_free_all_tx_resources(adapter);
1852 i40evf_free_all_rx_resources(adapter);
1853
1854 return 0;
1855}
1856
1857/**
1858 * i40evf_get_stats - Get System Network Statistics
1859 * @netdev: network interface device structure
1860 *
1861 * Returns the address of the device statistics structure.
1862 * The statistics are actually updated from the timer callback.
1863 **/
1864static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1865{
1866 struct i40evf_adapter *adapter = netdev_priv(netdev);
1867
1868 /* only return the current stats */
1869 return &adapter->net_stats;
1870}
1871
1872/**
1873 * i40evf_reinit_locked - Software reinit
1874 * @adapter: board private structure
1875 *
1876 * Reinititalizes the ring structures in response to a software configuration
1877 * change. Roughly the same as close followed by open, but skips releasing
1878 * and reallocating the interrupts.
1879 **/
1880void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1881{
1882 struct net_device *netdev = adapter->netdev;
1883 int err;
1884
1885 WARN_ON(in_interrupt());
1886
5eae00c5
GR		 1887 i40evf_down(adapter);
1888
1889 /* allocate transmit descriptors */
1890 err = i40evf_setup_all_tx_resources(adapter);
1891 if (err)
1892 goto err_reinit;
1893
1894 /* allocate receive descriptors */
1895 err = i40evf_setup_all_rx_resources(adapter);
1896 if (err)
1897 goto err_reinit;
1898
1899 i40evf_configure(adapter);
1900
1901 err = i40evf_up_complete(adapter);
1902 if (err)
1903 goto err_reinit;
1904
1905 i40evf_irq_enable(adapter, true);
1906 return;
1907
1908err_reinit:
80e72893 1909 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
5eae00c5
GR		 1910 i40evf_close(netdev);
1911}
1912
1913/**
1914 * i40evf_change_mtu - Change the Maximum Transfer Unit
1915 * @netdev: network interface device structure
1916 * @new_mtu: new value for maximum frame size
1917 *
1918 * Returns 0 on success, negative on failure
1919 **/
1920static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1921{
1922 struct i40evf_adapter *adapter = netdev_priv(netdev);
1923 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1924
1925 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1926 return -EINVAL;
1927
1928 /* must set new MTU before calling down or up */
1929 netdev->mtu = new_mtu;
1930 i40evf_reinit_locked(adapter);
1931 return 0;
1932}
1933
1934static const struct net_device_ops i40evf_netdev_ops = {
1935 .ndo_open = i40evf_open,
1936 .ndo_stop = i40evf_close,
1937 .ndo_start_xmit = i40evf_xmit_frame,
1938 .ndo_get_stats = i40evf_get_stats,
1939 .ndo_set_rx_mode = i40evf_set_rx_mode,
1940 .ndo_validate_addr = eth_validate_addr,
1941 .ndo_set_mac_address = i40evf_set_mac,
1942 .ndo_change_mtu = i40evf_change_mtu,
1943 .ndo_tx_timeout = i40evf_tx_timeout,
1944 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
1945 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
1946};
1947
1948/**
1949 * i40evf_check_reset_complete - check that VF reset is complete
1950 * @hw: pointer to hw struct
1951 *
1952 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1953 **/
1954static int i40evf_check_reset_complete(struct i40e_hw *hw)
1955{
1956 u32 rstat;
1957 int i;
1958
1959 for (i = 0; i < 100; i++) {
fd35886a
AS		 1960 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
1961 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1962 if ((rstat == I40E_VFR_VFACTIVE) ||
1963 (rstat == I40E_VFR_COMPLETED))
5eae00c5 1964 return 0;
f98a2006 1965 usleep_range(10, 20);
5eae00c5
GR		 1966 }
1967 return -EBUSY;
1968}
1969
1970/**
1971 * i40evf_init_task - worker thread to perform delayed initialization
1972 * @work: pointer to work_struct containing our data
1973 *
1974 * This task completes the work that was begun in probe. Due to the nature
1975 * of VF-PF communications, we may need to wait tens of milliseconds to get
1976 * reponses back from the PF. Rather than busy-wait in probe and bog down the
1977 * whole system, we'll do it in a task so we can sleep.
1978 * This task only runs during driver init. Once we've established
1979 * communications with the PF driver and set up our netdev, the watchdog
1980 * takes over.
1981 **/
1982static void i40evf_init_task(struct work_struct *work)
1983{
1984 struct i40evf_adapter *adapter = container_of(work,
1985 struct i40evf_adapter,
1986 init_task.work);
1987 struct net_device *netdev = adapter->netdev;
1988 struct i40evf_mac_filter *f;
1989 struct i40e_hw *hw = &adapter->hw;
1990 struct pci_dev *pdev = adapter->pdev;
1991 int i, err, bufsz;
1992
1993 switch (adapter->state) {
1994 case __I40EVF_STARTUP:
1995 /* driver loaded, probe complete */
ef8693eb
MW		 1996 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1997 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
5eae00c5
GR		 1998 err = i40e_set_mac_type(hw);
1999 if (err) {
c2a137cb
MW		 2000 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2001 err);
5eae00c5
GR		 2002 goto err;
2003 }
2004 err = i40evf_check_reset_complete(hw);
2005 if (err) {
0d9c7ea8 2006 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
75a64435 2007 err);
5eae00c5
GR		 2008 goto err;
2009 }
2010 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2011 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2012 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2013 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2014
2015 err = i40evf_init_adminq(hw);
2016 if (err) {
c2a137cb
MW		 2017 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2018 err);
5eae00c5
GR		 2019 goto err;
2020 }
2021 err = i40evf_send_api_ver(adapter);
2022 if (err) {
10bdd67b 2023 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
5eae00c5
GR		 2024 i40evf_shutdown_adminq(hw);
2025 goto err;
2026 }
2027 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2028 goto restart;
5eae00c5 2029 case __I40EVF_INIT_VERSION_CHECK:
10bdd67b 2030 if (!i40evf_asq_done(hw)) {
80e72893 2031 dev_err(&pdev->dev, "Admin queue command never completed\n");
906a6937
MW		 2032 i40evf_shutdown_adminq(hw);
2033 adapter->state = __I40EVF_STARTUP;
5eae00c5 2034 goto err;
10bdd67b 2035 }
5eae00c5
GR		 2036
2037 /* aq msg sent, awaiting reply */
2038 err = i40evf_verify_api_ver(adapter);
2039 if (err) {
d4f82fd3 2040 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
56f9920a 2041 err = i40evf_send_api_ver(adapter);
5eae00c5
GR		 2042 goto err;
2043 }
2044 err = i40evf_send_vf_config_msg(adapter);
2045 if (err) {
3f2ab172 2046 dev_err(&pdev->dev, "Unable to send config request (%d)\n",
5eae00c5
GR		 2047 err);
2048 goto err;
2049 }
2050 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2051 goto restart;
5eae00c5
GR		 2052 case __I40EVF_INIT_GET_RESOURCES:
2053 /* aq msg sent, awaiting reply */
2054 if (!adapter->vf_res) {
2055 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2056 (I40E_MAX_VF_VSI *
2057 sizeof(struct i40e_virtchnl_vsi_resource));
2058 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
c2a137cb 2059 if (!adapter->vf_res)
5eae00c5 2060 goto err;
5eae00c5
GR		 2061 }
2062 err = i40evf_get_vf_config(adapter);
906a6937 2063 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
906a6937
MW		 2064 err = i40evf_send_vf_config_msg(adapter);
2065 goto err;
2066 }
5eae00c5 2067 if (err) {
c2a137cb
MW		 2068 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2069 err);
5eae00c5
GR		 2070 goto err_alloc;
2071 }
2072 adapter->state = __I40EVF_INIT_SW;
2073 break;
2074 default:
2075 goto err_alloc;
2076 }
2077 /* got VF config message back from PF, now we can parse it */
2078 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2079 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2080 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2081 }
2082 if (!adapter->vsi_res) {
c2a137cb 2083 dev_err(&pdev->dev, "No LAN VSI found\n");
5eae00c5
GR		 2084 goto err_alloc;
2085 }
2086
2087 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2088
5eae00c5
GR		 2089 netdev->netdev_ops = &i40evf_netdev_ops;
2090 i40evf_set_ethtool_ops(netdev);
2091 netdev->watchdog_timeo = 5 * HZ;
dbbd8111
MW		 2092 netdev->features |= NETIF_F_HIGHDMA |
2093 NETIF_F_SG |
5eae00c5
GR		 2094 NETIF_F_IP_CSUM |
2095 NETIF_F_SCTP_CSUM |
2096 NETIF_F_IPV6_CSUM |
2097 NETIF_F_TSO |
2098 NETIF_F_TSO6 |
3415e8ce 2099 NETIF_F_RXCSUM |
5eae00c5
GR		 2100 NETIF_F_GRO;
2101
2102 if (adapter->vf_res->vf_offload_flags
2103 & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2104 netdev->vlan_features = netdev->features;
2105 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2106 NETIF_F_HW_VLAN_CTAG_RX |
2107 NETIF_F_HW_VLAN_CTAG_FILTER;
2108 }
2109
3415e8ce
GR		 2110 /* copy netdev features into list of user selectable features */
2111 netdev->hw_features |= netdev->features;
2112 netdev->hw_features &= ~NETIF_F_RXCSUM;
2113
5eae00c5 2114 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
b34f90e7 2115 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
c2a137cb 2116 adapter->hw.mac.addr);
5eae00c5
GR		 2117 random_ether_addr(adapter->hw.mac.addr);
2118 }
9a173901
GR		 2119 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2120 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
5eae00c5 2121
5eae00c5 2122 f = kzalloc(sizeof(*f), GFP_ATOMIC);
348d4994 2123 if (!f)
5eae00c5
GR		 2124 goto err_sw_init;
2125
9a173901 2126 ether_addr_copy(f->macaddr, adapter->hw.mac.addr);
5eae00c5
GR		 2127 f->add = true;
2128 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2129
2130 list_add(&f->list, &adapter->mac_filter_list);
2131
2132 init_timer(&adapter->watchdog_timer);
2133 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2134 adapter->watchdog_timer.data = (unsigned long)adapter;
2135 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2136
cc052927
MW		 2137 adapter->num_active_queues = min_t(int,
2138 adapter->vsi_res->num_queue_pairs,
2139 (int)(num_online_cpus()));
d732a184
MW		 2140 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2141 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
5eae00c5
GR		 2142 err = i40evf_init_interrupt_scheme(adapter);
2143 if (err)
2144 goto err_sw_init;
2145 i40evf_map_rings_to_vectors(adapter);
2146 i40evf_configure_rss(adapter);
2147 err = i40evf_request_misc_irq(adapter);
2148 if (err)
2149 goto err_sw_init;
2150
2151 netif_carrier_off(netdev);
2152
5eae00c5
GR		 2153 adapter->vsi.id = adapter->vsi_res->vsi_id;
2154 adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2155 adapter->vsi.back = adapter;
2156 adapter->vsi.base_vector = 1;
2157 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
ca99eb99
MW		 2158 adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2159 ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2160 adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2161 ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
5eae00c5
GR		 2162 adapter->vsi.netdev = adapter->netdev;
2163
ef8693eb
MW		 2164 if (!adapter->netdev_registered) {
2165 err = register_netdev(netdev);
2166 if (err)
2167 goto err_register;
2168 }
5eae00c5
GR		 2169
2170 adapter->netdev_registered = true;
2171
2172 netif_tx_stop_all_queues(netdev);
2173
b34f90e7 2174 dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
5eae00c5
GR		 2175 if (netdev->features & NETIF_F_GRO)
2176 dev_info(&pdev->dev, "GRO is enabled\n");
2177
2178 dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2179 adapter->state = __I40EVF_DOWN;
2180 set_bit(__I40E_DOWN, &adapter->vsi.state);
2181 i40evf_misc_irq_enable(adapter);
2182 return;
2183restart:
2184 schedule_delayed_work(&adapter->init_task,
2185 msecs_to_jiffies(50));
2186 return;
2187
2188err_register:
2189 i40evf_free_misc_irq(adapter);
2190err_sw_init:
2191 i40evf_reset_interrupt_capability(adapter);
5eae00c5
GR		 2192err_alloc:
2193 kfree(adapter->vf_res);
2194 adapter->vf_res = NULL;
2195err:
2196 /* Things went into the weeds, so try again later */
2197 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
80e72893 2198 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
ef8693eb 2199 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
5eae00c5
GR		 2200 return; /* do not reschedule */
2201 }
2202 schedule_delayed_work(&adapter->init_task, HZ * 3);
5eae00c5
GR		 2203}
2204
2205/**
2206 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2207 * @pdev: pci device structure
2208 **/
2209static void i40evf_shutdown(struct pci_dev *pdev)
2210{
2211 struct net_device *netdev = pci_get_drvdata(pdev);
2212
2213 netif_device_detach(netdev);
2214
2215 if (netif_running(netdev))
2216 i40evf_close(netdev);
2217
2218#ifdef CONFIG_PM
2219 pci_save_state(pdev);
2220
2221#endif
2222 pci_disable_device(pdev);
2223}
2224
2225/**
2226 * i40evf_probe - Device Initialization Routine
2227 * @pdev: PCI device information struct
2228 * @ent: entry in i40evf_pci_tbl
2229 *
2230 * Returns 0 on success, negative on failure
2231 *
2232 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2233 * The OS initialization, configuring of the adapter private structure,
2234 * and a hardware reset occur.
2235 **/
2236static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2237{
2238 struct net_device *netdev;
2239 struct i40evf_adapter *adapter = NULL;
2240 struct i40e_hw *hw = NULL;
dbbd8111 2241 int err;
5eae00c5
GR		 2242
2243 err = pci_enable_device(pdev);
2244 if (err)
2245 return err;
2246
6494294f 2247 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
6494294f 2248 if (err) {
e3e3bfdd
JS		 2249 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2250 if (err) {
2251 dev_err(&pdev->dev,
2252 "DMA configuration failed: 0x%x\n", err);
2253 goto err_dma;
2254 }
5eae00c5
GR		 2255 }
2256
2257 err = pci_request_regions(pdev, i40evf_driver_name);
2258 if (err) {
2259 dev_err(&pdev->dev,
2260 "pci_request_regions failed 0x%x\n", err);
2261 goto err_pci_reg;
2262 }
2263
2264 pci_enable_pcie_error_reporting(pdev);
2265
2266 pci_set_master(pdev);
2267
2268 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2269 MAX_TX_QUEUES);
2270 if (!netdev) {
2271 err = -ENOMEM;
2272 goto err_alloc_etherdev;
2273 }
2274
2275 SET_NETDEV_DEV(netdev, &pdev->dev);
2276
2277 pci_set_drvdata(pdev, netdev);
2278 adapter = netdev_priv(netdev);
5eae00c5
GR		 2279
2280 adapter->netdev = netdev;
2281 adapter->pdev = pdev;
2282
2283 hw = &adapter->hw;
2284 hw->back = adapter;
2285
2286 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2287 adapter->state = __I40EVF_STARTUP;
2288
2289 /* Call save state here because it relies on the adapter struct. */
2290 pci_save_state(pdev);
2291
2292 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2293 pci_resource_len(pdev, 0));
2294 if (!hw->hw_addr) {
2295 err = -EIO;
2296 goto err_ioremap;
2297 }
2298 hw->vendor_id = pdev->vendor;
2299 hw->device_id = pdev->device;
2300 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2301 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2302 hw->subsystem_device_id = pdev->subsystem_device;
2303 hw->bus.device = PCI_SLOT(pdev->devfn);
2304 hw->bus.func = PCI_FUNC(pdev->devfn);
2305
8bb1a540
SK		 2306 INIT_LIST_HEAD(&adapter->mac_filter_list);
2307 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2308
5eae00c5
GR		 2309 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2310 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2311 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2312 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2313 schedule_delayed_work(&adapter->init_task, 10);
2314
2315 return 0;
2316
2317err_ioremap:
2318 free_netdev(netdev);
2319err_alloc_etherdev:
2320 pci_release_regions(pdev);
2321err_pci_reg:
2322err_dma:
2323 pci_disable_device(pdev);
2324 return err;
2325}
2326
2327#ifdef CONFIG_PM
2328/**
2329 * i40evf_suspend - Power management suspend routine
2330 * @pdev: PCI device information struct
2331 * @state: unused
2332 *
2333 * Called when the system (VM) is entering sleep/suspend.
2334 **/
2335static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2336{
2337 struct net_device *netdev = pci_get_drvdata(pdev);
2338 struct i40evf_adapter *adapter = netdev_priv(netdev);
2339 int retval = 0;
2340
2341 netif_device_detach(netdev);
2342
2343 if (netif_running(netdev)) {
2344 rtnl_lock();
2345 i40evf_down(adapter);
2346 rtnl_unlock();
2347 }
2348 i40evf_free_misc_irq(adapter);
2349 i40evf_reset_interrupt_capability(adapter);
2350
2351 retval = pci_save_state(pdev);
2352 if (retval)
2353 return retval;
2354
2355 pci_disable_device(pdev);
2356
2357 return 0;
2358}
2359
2360/**
2361 * i40evf_resume - Power managment resume routine
2362 * @pdev: PCI device information struct
2363 *
2364 * Called when the system (VM) is resumed from sleep/suspend.
2365 **/
2366static int i40evf_resume(struct pci_dev *pdev)
2367{
2368 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2369 struct net_device *netdev = adapter->netdev;
2370 u32 err;
2371
2372 pci_set_power_state(pdev, PCI_D0);
2373 pci_restore_state(pdev);
2374 /* pci_restore_state clears dev->state_saved so call
2375 * pci_save_state to restore it.
2376 */
2377 pci_save_state(pdev);
2378
2379 err = pci_enable_device_mem(pdev);
2380 if (err) {
2381 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2382 return err;
2383 }
2384 pci_set_master(pdev);
2385
2386 rtnl_lock();
2387 err = i40evf_set_interrupt_capability(adapter);
2388 if (err) {
2389 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2390 return err;
2391 }
2392 err = i40evf_request_misc_irq(adapter);
2393 rtnl_unlock();
2394 if (err) {
2395 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2396 return err;
2397 }
2398
2399 schedule_work(&adapter->reset_task);
2400
2401 netif_device_attach(netdev);
2402
2403 return err;
2404}
2405
2406#endif /* CONFIG_PM */
2407/**
2408 * i40evf_remove - Device Removal Routine
2409 * @pdev: PCI device information struct
2410 *
2411 * i40evf_remove is called by the PCI subsystem to alert the driver
2412 * that it should release a PCI device. The could be caused by a
2413 * Hot-Plug event, or because the driver is going to be removed from
2414 * memory.
2415 **/
2416static void i40evf_remove(struct pci_dev *pdev)
2417{
2418 struct net_device *netdev = pci_get_drvdata(pdev);
2419 struct i40evf_adapter *adapter = netdev_priv(netdev);
6ba36a24 2420 struct i40evf_mac_filter *f, *ftmp;
5eae00c5 2421 struct i40e_hw *hw = &adapter->hw;
53d0b3ae 2422 int count = 50;
5eae00c5
GR		 2423
2424 cancel_delayed_work_sync(&adapter->init_task);
ef8693eb 2425 cancel_work_sync(&adapter->reset_task);
5eae00c5
GR		 2426
2427 if (adapter->netdev_registered) {
2428 unregister_netdev(netdev);
2429 adapter->netdev_registered = false;
2430 }
53d0b3ae
MW		 2431 while (count-- && adapter->aq_required)
2432 msleep(50);
2433
2434 if (count < 0)
2435 dev_err(&pdev->dev, "Timed out waiting for PF driver.\n");
5eae00c5
GR		 2436 adapter->state = __I40EVF_REMOVE;
2437
dbb01c8a 2438 if (adapter->msix_entries) {
5eae00c5 2439 i40evf_misc_irq_disable(adapter);
5eae00c5 2440 i40evf_free_misc_irq(adapter);
5eae00c5 2441 i40evf_reset_interrupt_capability(adapter);
d31944d6 2442 i40evf_free_q_vectors(adapter);
5eae00c5
GR		 2443 }
2444
e5d17c3e
MW		 2445 if (adapter->watchdog_timer.function)
2446 del_timer_sync(&adapter->watchdog_timer);
2447
dbb01c8a
MW		 2448 flush_scheduled_work();
2449
5eae00c5
GR		 2450 if (hw->aq.asq.count)
2451 i40evf_shutdown_adminq(hw);
2452
2453 iounmap(hw->hw_addr);
2454 pci_release_regions(pdev);
2455
2456 i40evf_free_queues(adapter);
2457 kfree(adapter->vf_res);
6ba36a24
MW		 2458 /* If we got removed before an up/down sequence, we've got a filter
2459 * hanging out there that we need to get rid of.
2460 */
2461 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2462 list_del(&f->list);
2463 kfree(f);
2464 }
37dfdf37
MW		 2465 list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2466 list_del(&f->list);
2467 kfree(f);
2468 }
5eae00c5
GR		 2469
2470 free_netdev(netdev);
2471
2472 pci_disable_pcie_error_reporting(pdev);
2473
2474 pci_disable_device(pdev);
2475}
2476
2477static struct pci_driver i40evf_driver = {
2478 .name = i40evf_driver_name,
2479 .id_table = i40evf_pci_tbl,
2480 .probe = i40evf_probe,
2481 .remove = i40evf_remove,
2482#ifdef CONFIG_PM
2483 .suspend = i40evf_suspend,
2484 .resume = i40evf_resume,
2485#endif
2486 .shutdown = i40evf_shutdown,
2487};
2488
2489/**
2490 * i40e_init_module - Driver Registration Routine
2491 *
2492 * i40e_init_module is the first routine called when the driver is
2493 * loaded. All it does is register with the PCI subsystem.
2494 **/
2495static int __init i40evf_init_module(void)
2496{
2497 int ret;
75a64435 2498
5eae00c5 2499 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
75a64435 2500 i40evf_driver_version);
5eae00c5
GR		 2501
2502 pr_info("%s\n", i40evf_copyright);
2503
2504 ret = pci_register_driver(&i40evf_driver);
2505 return ret;
2506}
2507
2508module_init(i40evf_init_module);
2509
2510/**
2511 * i40e_exit_module - Driver Exit Cleanup Routine
2512 *
2513 * i40e_exit_module is called just before the driver is removed
2514 * from memory.
2515 **/
2516static void __exit i40evf_exit_module(void)
2517{
2518 pci_unregister_driver(&i40evf_driver);
2519}
2520
2521module_exit(i40evf_exit_module);
2522
2523/* i40evf_main.c */
Linux kernel - Deliverables
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