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i40evf: remove aq_pending
[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
5b8eb176 4 * Copyright(c) 2013 - 2015 Intel Corporation.
5eae00c5
GR		 5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
b831607d
JB		 15 * You should have received a copy of the GNU General Public License along
16 * with this program. If not, see <http://www.gnu.org/licenses/>.
17 *
5eae00c5
GR		 18 * The full GNU General Public License is included in this distribution in
19 * the file called "COPYING".
20 *
21 * Contact Information:
22 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24 *
25 ******************************************************************************/
26
27#include "i40evf.h"
28#include "i40e_prototype.h"
29static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter);
30static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter);
31static int i40evf_close(struct net_device *netdev);
32
33char i40evf_driver_name[] = "i40evf";
34static const char i40evf_driver_string[] =
0af56f44 35 "Intel(R) XL710/X710 Virtual Function Network Driver";
5eae00c5 36
ec7a06fd 37#define DRV_VERSION "1.2.25"
5eae00c5
GR		 38const char i40evf_driver_version[] = DRV_VERSION;
39static const char i40evf_copyright[] =
673f2ebf 40 "Copyright (c) 2013 - 2014 Intel Corporation.";
5eae00c5
GR		 41
42/* i40evf_pci_tbl - PCI Device ID Table
43 *
44 * Wildcard entries (PCI_ANY_ID) should come last
45 * Last entry must be all 0s
46 *
47 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
48 * Class, Class Mask, private data (not used) }
49 */
9baa3c34 50static const struct pci_device_id i40evf_pci_tbl[] = {
ab60085e 51 {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
5eae00c5
GR		 52 /* required last entry */
53 {0, }
54};
55
56MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
57
58MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
59MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
60MODULE_LICENSE("GPL");
61MODULE_VERSION(DRV_VERSION);
62
63/**
64 * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
65 * @hw: pointer to the HW structure
66 * @mem: ptr to mem struct to fill out
67 * @size: size of memory requested
68 * @alignment: what to align the allocation to
69 **/
70i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
71 struct i40e_dma_mem *mem,
72 u64 size, u32 alignment)
73{
74 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
75
76 if (!mem)
77 return I40E_ERR_PARAM;
78
79 mem->size = ALIGN(size, alignment);
80 mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
81 (dma_addr_t *)&mem->pa, GFP_KERNEL);
82 if (mem->va)
83 return 0;
84 else
85 return I40E_ERR_NO_MEMORY;
86}
87
88/**
89 * i40evf_free_dma_mem_d - OS specific memory free for shared code
90 * @hw: pointer to the HW structure
91 * @mem: ptr to mem struct to free
92 **/
93i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
94{
95 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
96
97 if (!mem || !mem->va)
98 return I40E_ERR_PARAM;
99 dma_free_coherent(&adapter->pdev->dev, mem->size,
100 mem->va, (dma_addr_t)mem->pa);
101 return 0;
102}
103
104/**
105 * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
106 * @hw: pointer to the HW structure
107 * @mem: ptr to mem struct to fill out
108 * @size: size of memory requested
109 **/
110i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
111 struct i40e_virt_mem *mem, u32 size)
112{
113 if (!mem)
114 return I40E_ERR_PARAM;
115
116 mem->size = size;
117 mem->va = kzalloc(size, GFP_KERNEL);
118
119 if (mem->va)
120 return 0;
121 else
122 return I40E_ERR_NO_MEMORY;
123}
124
125/**
126 * i40evf_free_virt_mem_d - OS specific memory free for shared code
127 * @hw: pointer to the HW structure
128 * @mem: ptr to mem struct to free
129 **/
130i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
131 struct i40e_virt_mem *mem)
132{
133 if (!mem)
134 return I40E_ERR_PARAM;
135
136 /* it's ok to kfree a NULL pointer */
137 kfree(mem->va);
138
139 return 0;
140}
141
142/**
143 * i40evf_debug_d - OS dependent version of debug printing
144 * @hw: pointer to the HW structure
145 * @mask: debug level mask
146 * @fmt_str: printf-type format description
147 **/
148void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
149{
150 char buf[512];
151 va_list argptr;
152
153 if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
154 return;
155
156 va_start(argptr, fmt_str);
157 vsnprintf(buf, sizeof(buf), fmt_str, argptr);
158 va_end(argptr);
159
160 /* the debug string is already formatted with a newline */
161 pr_info("%s", buf);
162}
163
164/**
165 * i40evf_tx_timeout - Respond to a Tx Hang
166 * @netdev: network interface device structure
167 **/
168static void i40evf_tx_timeout(struct net_device *netdev)
169{
170 struct i40evf_adapter *adapter = netdev_priv(netdev);
171
172 adapter->tx_timeout_count++;
625777e3 173 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) {
3526d800 174 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
625777e3
MW		 175 schedule_work(&adapter->reset_task);
176 }
5eae00c5
GR		 177}
178
179/**
180 * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
181 * @adapter: board private structure
182 **/
183static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
184{
185 struct i40e_hw *hw = &adapter->hw;
75a64435 186
5eae00c5
GR		 187 wr32(hw, I40E_VFINT_DYN_CTL01, 0);
188
189 /* read flush */
190 rd32(hw, I40E_VFGEN_RSTAT);
191
192 synchronize_irq(adapter->msix_entries[0].vector);
193}
194
195/**
196 * i40evf_misc_irq_enable - Enable default interrupt generation settings
197 * @adapter: board private structure
198 **/
199static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
200{
201 struct i40e_hw *hw = &adapter->hw;
75a64435 202
5eae00c5
GR		 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);
5eae00c5
GR		 229}
230
231/**
232 * i40evf_irq_enable_queues - Enable interrupt for specified queues
233 * @adapter: board private structure
234 * @mask: bitmap of queues to enable
235 **/
236void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
237{
238 struct i40e_hw *hw = &adapter->hw;
239 int i;
240
241 for (i = 1; i < adapter->num_msix_vectors; i++) {
242 if (mask & (1 << (i - 1))) {
243 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
244 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
97bf75f1 245 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
5eae00c5
GR		 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 **/
75a64435 256static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
5eae00c5
GR		 257{
258 struct i40e_hw *hw = &adapter->hw;
259 int i;
260 uint32_t dyn_ctl;
261
164ec1bf
MW		 262 if (mask & 1) {
263 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
264 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
97bf75f1 265 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
164ec1bf
MW		 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 |
97bf75f1 273 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
5eae00c5
GR		 274 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
275 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
276 }
277 }
278}
279
280/**
281 * i40evf_irq_enable - Enable default interrupt generation settings
282 * @adapter: board private structure
283 **/
284void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
285{
286 struct i40e_hw *hw = &adapter->hw;
287
164ec1bf 288 i40evf_misc_irq_enable(adapter);
5eae00c5
GR		 289 i40evf_irq_enable_queues(adapter, ~0);
290
291 if (flush)
292 rd32(hw, I40E_VFGEN_RSTAT);
293}
294
295/**
296 * i40evf_msix_aq - Interrupt handler for vector 0
297 * @irq: interrupt number
298 * @data: pointer to netdev
299 **/
300static irqreturn_t i40evf_msix_aq(int irq, void *data)
301{
302 struct net_device *netdev = data;
303 struct i40evf_adapter *adapter = netdev_priv(netdev);
304 struct i40e_hw *hw = &adapter->hw;
305 u32 val;
306 u32 ena_mask;
307
308 /* handle non-queue interrupts */
309 val = rd32(hw, I40E_VFINT_ICR01);
310 ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
311
312
313 val = rd32(hw, I40E_VFINT_DYN_CTL01);
314 val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
315 wr32(hw, I40E_VFINT_DYN_CTL01, val);
316
5eae00c5
GR		 317 /* schedule work on the private workqueue */
318 schedule_work(&adapter->adminq_task);
319
320 return IRQ_HANDLED;
321}
322
323/**
324 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
325 * @irq: interrupt number
326 * @data: pointer to a q_vector
327 **/
328static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
329{
330 struct i40e_q_vector *q_vector = data;
331
332 if (!q_vector->tx.ring && !q_vector->rx.ring)
333 return IRQ_HANDLED;
334
335 napi_schedule(&q_vector->napi);
336
337 return IRQ_HANDLED;
338}
339
340/**
341 * i40evf_map_vector_to_rxq - associate irqs with rx queues
342 * @adapter: board private structure
343 * @v_idx: interrupt number
344 * @r_idx: queue number
345 **/
346static void
347i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
348{
349 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
350 struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
351
352 rx_ring->q_vector = q_vector;
353 rx_ring->next = q_vector->rx.ring;
354 rx_ring->vsi = &adapter->vsi;
355 q_vector->rx.ring = rx_ring;
356 q_vector->rx.count++;
357 q_vector->rx.latency_range = I40E_LOW_LATENCY;
358}
359
360/**
361 * i40evf_map_vector_to_txq - associate irqs with tx queues
362 * @adapter: board private structure
363 * @v_idx: interrupt number
364 * @t_idx: queue number
365 **/
366static void
367i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
368{
369 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
370 struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
371
372 tx_ring->q_vector = q_vector;
373 tx_ring->next = q_vector->tx.ring;
374 tx_ring->vsi = &adapter->vsi;
375 q_vector->tx.ring = tx_ring;
376 q_vector->tx.count++;
377 q_vector->tx.latency_range = I40E_LOW_LATENCY;
378 q_vector->num_ringpairs++;
379 q_vector->ring_mask |= (1 << t_idx);
380}
381
382/**
383 * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
384 * @adapter: board private structure to initialize
385 *
386 * This function maps descriptor rings to the queue-specific vectors
387 * we were allotted through the MSI-X enabling code. Ideally, we'd have
388 * one vector per ring/queue, but on a constrained vector budget, we
389 * group the rings as "efficiently" as possible. You would add new
390 * mapping configurations in here.
391 **/
392static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
393{
394 int q_vectors;
395 int v_start = 0;
396 int rxr_idx = 0, txr_idx = 0;
cc052927
MW		 397 int rxr_remaining = adapter->num_active_queues;
398 int txr_remaining = adapter->num_active_queues;
5eae00c5
GR		 399 int i, j;
400 int rqpv, tqpv;
401 int err = 0;
402
403 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
404
405 /* The ideal configuration...
406 * We have enough vectors to map one per queue.
407 */
408 if (q_vectors == (rxr_remaining * 2)) {
409 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
410 i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
411
412 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
413 i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
414 goto out;
415 }
416
417 /* If we don't have enough vectors for a 1-to-1
418 * mapping, we'll have to group them so there are
419 * multiple queues per vector.
420 * Re-adjusting *qpv takes care of the remainder.
421 */
422 for (i = v_start; i < q_vectors; i++) {
423 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
424 for (j = 0; j < rqpv; j++) {
425 i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
426 rxr_idx++;
427 rxr_remaining--;
428 }
429 }
430 for (i = v_start; i < q_vectors; i++) {
431 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
432 for (j = 0; j < tqpv; j++) {
433 i40evf_map_vector_to_txq(adapter, i, txr_idx);
434 txr_idx++;
435 txr_remaining--;
436 }
437 }
438
439out:
440 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
441
442 return err;
443}
444
445/**
446 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
447 * @adapter: board private structure
448 *
449 * Allocates MSI-X vectors for tx and rx handling, and requests
450 * interrupts from the kernel.
451 **/
452static int
453i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
454{
455 int vector, err, q_vectors;
456 int rx_int_idx = 0, tx_int_idx = 0;
457
458 i40evf_irq_disable(adapter);
459 /* Decrement for Other and TCP Timer vectors */
460 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
461
462 for (vector = 0; vector < q_vectors; vector++) {
463 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
464
465 if (q_vector->tx.ring && q_vector->rx.ring) {
466 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
467 "i40evf-%s-%s-%d", basename,
468 "TxRx", rx_int_idx++);
469 tx_int_idx++;
470 } else if (q_vector->rx.ring) {
471 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
472 "i40evf-%s-%s-%d", basename,
473 "rx", rx_int_idx++);
474 } else if (q_vector->tx.ring) {
475 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
476 "i40evf-%s-%s-%d", basename,
477 "tx", tx_int_idx++);
478 } else {
479 /* skip this unused q_vector */
480 continue;
481 }
482 err = request_irq(
483 adapter->msix_entries[vector + NONQ_VECS].vector,
484 i40evf_msix_clean_rings,
485 0,
486 q_vector->name,
487 q_vector);
488 if (err) {
489 dev_info(&adapter->pdev->dev,
490 "%s: request_irq failed, error: %d\n",
491 __func__, err);
492 goto free_queue_irqs;
493 }
494 /* assign the mask for this irq */
495 irq_set_affinity_hint(
496 adapter->msix_entries[vector + NONQ_VECS].vector,
497 q_vector->affinity_mask);
498 }
499
500 return 0;
501
502free_queue_irqs:
503 while (vector) {
504 vector--;
505 irq_set_affinity_hint(
506 adapter->msix_entries[vector + NONQ_VECS].vector,
507 NULL);
508 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
509 adapter->q_vector[vector]);
510 }
511 return err;
512}
513
514/**
515 * i40evf_request_misc_irq - Initialize MSI-X interrupts
516 * @adapter: board private structure
517 *
518 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
519 * vector is only for the admin queue, and stays active even when the netdev
520 * is closed.
521 **/
522static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
523{
524 struct net_device *netdev = adapter->netdev;
525 int err;
526
b39c1e2c 527 snprintf(adapter->misc_vector_name,
9a21a007
CW		 528 sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
529 dev_name(&adapter->pdev->dev));
5eae00c5 530 err = request_irq(adapter->msix_entries[0].vector,
e1dfee8e
MW		 531 &i40evf_msix_aq, 0,
532 adapter->misc_vector_name, netdev);
5eae00c5
GR		 533 if (err) {
534 dev_err(&adapter->pdev->dev,
77fa28be
CS		 535 "request_irq for %s failed: %d\n",
536 adapter->misc_vector_name, err);
5eae00c5
GR		 537 free_irq(adapter->msix_entries[0].vector, netdev);
538 }
539 return err;
540}
541
542/**
543 * i40evf_free_traffic_irqs - Free MSI-X interrupts
544 * @adapter: board private structure
545 *
546 * Frees all MSI-X vectors other than 0.
547 **/
548static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
549{
550 int i;
551 int q_vectors;
75a64435 552
5eae00c5
GR		 553 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
554
555 for (i = 0; i < q_vectors; i++) {
556 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
557 NULL);
558 free_irq(adapter->msix_entries[i+1].vector,
559 adapter->q_vector[i]);
560 }
561}
562
563/**
564 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
565 * @adapter: board private structure
566 *
567 * Frees MSI-X vector 0.
568 **/
569static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
570{
571 struct net_device *netdev = adapter->netdev;
572
573 free_irq(adapter->msix_entries[0].vector, netdev);
574}
575
576/**
577 * i40evf_configure_tx - Configure Transmit Unit after Reset
578 * @adapter: board private structure
579 *
580 * Configure the Tx unit of the MAC after a reset.
581 **/
582static void i40evf_configure_tx(struct i40evf_adapter *adapter)
583{
584 struct i40e_hw *hw = &adapter->hw;
585 int i;
75a64435 586
cc052927 587 for (i = 0; i < adapter->num_active_queues; i++)
5eae00c5
GR		 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
cc052927 632 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5
GR		 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{
13acb546
MW		 667 struct i40evf_vlan_filter *f = NULL;
668 int count = 50;
669
670 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
671 &adapter->crit_section)) {
672 udelay(1);
673 if (--count == 0)
674 goto out;
675 }
5eae00c5
GR		 676
677 f = i40evf_find_vlan(adapter, vlan);
348d4994 678 if (!f) {
5eae00c5 679 f = kzalloc(sizeof(*f), GFP_ATOMIC);
348d4994 680 if (!f)
13acb546 681 goto clearout;
249c8b8d 682
5eae00c5
GR		 683 f->vlan = vlan;
684
685 INIT_LIST_HEAD(&f->list);
686 list_add(&f->list, &adapter->vlan_filter_list);
687 f->add = true;
688 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
689 }
690
13acb546
MW		 691clearout:
692 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
693out:
5eae00c5
GR		 694 return f;
695}
696
697/**
698 * i40evf_del_vlan - Remove a vlan filter from the list
699 * @adapter: board private structure
700 * @vlan: VLAN tag
701 **/
702static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
703{
704 struct i40evf_vlan_filter *f;
13acb546
MW		 705 int count = 50;
706
707 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
708 &adapter->crit_section)) {
709 udelay(1);
710 if (--count == 0)
711 return;
712 }
5eae00c5
GR		 713
714 f = i40evf_find_vlan(adapter, vlan);
715 if (f) {
716 f->remove = true;
717 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
718 }
13acb546 719 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
5eae00c5
GR		 720}
721
722/**
723 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
724 * @netdev: network device struct
725 * @vid: VLAN tag
726 **/
727static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
75a64435 728 __always_unused __be16 proto, u16 vid)
5eae00c5
GR		 729{
730 struct i40evf_adapter *adapter = netdev_priv(netdev);
731
732 if (i40evf_add_vlan(adapter, vid) == NULL)
733 return -ENOMEM;
734 return 0;
735}
736
737/**
738 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
739 * @netdev: network device struct
740 * @vid: VLAN tag
741 **/
742static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
75a64435 743 __always_unused __be16 proto, u16 vid)
5eae00c5
GR		 744{
745 struct i40evf_adapter *adapter = netdev_priv(netdev);
746
747 i40evf_del_vlan(adapter, vid);
748 return 0;
749}
750
751/**
752 * i40evf_find_filter - Search filter list for specific mac filter
753 * @adapter: board private structure
754 * @macaddr: the MAC address
755 *
756 * Returns ptr to the filter object or NULL
757 **/
758static struct
759i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
760 u8 *macaddr)
761{
762 struct i40evf_mac_filter *f;
763
764 if (!macaddr)
765 return NULL;
766
767 list_for_each_entry(f, &adapter->mac_filter_list, list) {
768 if (ether_addr_equal(macaddr, f->macaddr))
769 return f;
770 }
771 return NULL;
772}
773
774/**
775 * i40e_add_filter - Add a mac filter to the filter list
776 * @adapter: board private structure
777 * @macaddr: the MAC address
778 *
779 * Returns ptr to the filter object or NULL when no memory available.
780 **/
781static struct
782i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
783 u8 *macaddr)
784{
785 struct i40evf_mac_filter *f;
54e16f64 786 int count = 50;
5eae00c5
GR		 787
788 if (!macaddr)
789 return NULL;
790
791 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
54e16f64 792 &adapter->crit_section)) {
b65476cd 793 udelay(1);
54e16f64
MW		 794 if (--count == 0)
795 return NULL;
796 }
5eae00c5
GR		 797
798 f = i40evf_find_filter(adapter, macaddr);
348d4994 799 if (!f) {
5eae00c5 800 f = kzalloc(sizeof(*f), GFP_ATOMIC);
348d4994 801 if (!f) {
5eae00c5
GR		 802 clear_bit(__I40EVF_IN_CRITICAL_TASK,
803 &adapter->crit_section);
804 return NULL;
805 }
806
9a173901 807 ether_addr_copy(f->macaddr, macaddr);
5eae00c5
GR		 808
809 list_add(&f->list, &adapter->mac_filter_list);
810 f->add = true;
811 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
812 }
813
814 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
815 return f;
816}
817
818/**
819 * i40evf_set_mac - NDO callback to set port mac address
820 * @netdev: network interface device structure
821 * @p: pointer to an address structure
822 *
823 * Returns 0 on success, negative on failure
824 **/
825static int i40evf_set_mac(struct net_device *netdev, void *p)
826{
827 struct i40evf_adapter *adapter = netdev_priv(netdev);
828 struct i40e_hw *hw = &adapter->hw;
829 struct i40evf_mac_filter *f;
830 struct sockaddr *addr = p;
831
832 if (!is_valid_ether_addr(addr->sa_data))
833 return -EADDRNOTAVAIL;
834
835 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
836 return 0;
837
838 f = i40evf_add_filter(adapter, addr->sa_data);
839 if (f) {
9a173901
GR		 840 ether_addr_copy(hw->mac.addr, addr->sa_data);
841 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
5eae00c5
GR		 842 }
843
844 return (f == NULL) ? -ENOMEM : 0;
845}
846
847/**
848 * i40evf_set_rx_mode - NDO callback to set the netdev filters
849 * @netdev: network interface device structure
850 **/
851static void i40evf_set_rx_mode(struct net_device *netdev)
852{
853 struct i40evf_adapter *adapter = netdev_priv(netdev);
854 struct i40evf_mac_filter *f, *ftmp;
855 struct netdev_hw_addr *uca;
856 struct netdev_hw_addr *mca;
54e16f64 857 int count = 50;
5eae00c5
GR		 858
859 /* add addr if not already in the filter list */
860 netdev_for_each_uc_addr(uca, netdev) {
861 i40evf_add_filter(adapter, uca->addr);
862 }
863 netdev_for_each_mc_addr(mca, netdev) {
864 i40evf_add_filter(adapter, mca->addr);
865 }
866
867 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
54e16f64 868 &adapter->crit_section)) {
b65476cd 869 udelay(1);
54e16f64
MW		 870 if (--count == 0) {
871 dev_err(&adapter->pdev->dev,
872 "Failed to get lock in %s\n", __func__);
873 return;
874 }
875 }
5eae00c5
GR		 876 /* remove filter if not in netdev list */
877 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
878 bool found = false;
879
dc5f2de6 880 if (is_multicast_ether_addr(f->macaddr)) {
5eae00c5
GR		 881 netdev_for_each_mc_addr(mca, netdev) {
882 if (ether_addr_equal(mca->addr, f->macaddr)) {
883 found = true;
884 break;
885 }
886 }
887 } else {
888 netdev_for_each_uc_addr(uca, netdev) {
889 if (ether_addr_equal(uca->addr, f->macaddr)) {
890 found = true;
891 break;
892 }
893 }
894 }
895 if (found) {
896 f->remove = true;
897 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
898 }
899 }
900 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
901}
902
903/**
904 * i40evf_napi_enable_all - enable NAPI on all queue vectors
905 * @adapter: board private structure
906 **/
907static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
908{
909 int q_idx;
910 struct i40e_q_vector *q_vector;
911 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
912
913 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
914 struct napi_struct *napi;
75a64435 915
5eae00c5
GR		 916 q_vector = adapter->q_vector[q_idx];
917 napi = &q_vector->napi;
918 napi_enable(napi);
919 }
920}
921
922/**
923 * i40evf_napi_disable_all - disable NAPI on all queue vectors
924 * @adapter: board private structure
925 **/
926static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
927{
928 int q_idx;
929 struct i40e_q_vector *q_vector;
930 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
931
932 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
933 q_vector = adapter->q_vector[q_idx];
934 napi_disable(&q_vector->napi);
935 }
936}
937
938/**
939 * i40evf_configure - set up transmit and receive data structures
940 * @adapter: board private structure
941 **/
942static void i40evf_configure(struct i40evf_adapter *adapter)
943{
944 struct net_device *netdev = adapter->netdev;
945 int i;
946
947 i40evf_set_rx_mode(netdev);
948
949 i40evf_configure_tx(adapter);
950 i40evf_configure_rx(adapter);
951 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
952
cc052927 953 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5 954 struct i40e_ring *ring = adapter->rx_rings[i];
75a64435 955
a132af24 956 i40evf_alloc_rx_buffers_1buf(ring, ring->count);
5eae00c5
GR		 957 ring->next_to_use = ring->count - 1;
958 writel(ring->next_to_use, ring->tail);
959 }
960}
961
962/**
963 * i40evf_up_complete - Finish the last steps of bringing up a connection
964 * @adapter: board private structure
965 **/
966static int i40evf_up_complete(struct i40evf_adapter *adapter)
967{
968 adapter->state = __I40EVF_RUNNING;
969 clear_bit(__I40E_DOWN, &adapter->vsi.state);
970
971 i40evf_napi_enable_all(adapter);
972
973 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
974 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
975 return 0;
976}
977
5eae00c5
GR		 978/**
979 * i40e_down - Shutdown the connection processing
980 * @adapter: board private structure
981 **/
982void i40evf_down(struct i40evf_adapter *adapter)
983{
984 struct net_device *netdev = adapter->netdev;
985 struct i40evf_mac_filter *f;
986
ddf0b3a6
MW		 987 if (adapter->state == __I40EVF_DOWN)
988 return;
989
53d0b3ae
MW		 990 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
991 &adapter->crit_section))
992 usleep_range(500, 1000);
993
63e18c25
MW		 994 netif_carrier_off(netdev);
995 netif_tx_disable(netdev);
748c434b 996 i40evf_napi_disable_all(adapter);
63e18c25 997 i40evf_irq_disable(adapter);
53d0b3ae 998
ef8693eb 999 /* remove all MAC filters */
5eae00c5
GR		 1000 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1001 f->remove = true;
1002 }
ed1f5b58
MW		 1003 /* remove all VLAN filters */
1004 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1005 f->remove = true;
1006 }
ef8693eb
MW		 1007 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1008 adapter->state != __I40EVF_RESETTING) {
53d0b3ae
MW		 1009 /* cancel any current operation */
1010 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
53d0b3ae
MW		 1011 /* Schedule operations to close down the HW. Don't wait
1012 * here for this to complete. The watchdog is still running
1013 * and it will take care of this.
1014 */
1015 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
ed1f5b58 1016 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
ef8693eb 1017 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
ef8693eb 1018 }
5eae00c5 1019
53d0b3ae 1020 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
5eae00c5
GR		 1021}
1022
1023/**
1024 * i40evf_acquire_msix_vectors - Setup the MSIX capability
1025 * @adapter: board private structure
1026 * @vectors: number of vectors to request
1027 *
1028 * Work with the OS to set up the MSIX vectors needed.
1029 *
1030 * Returns 0 on success, negative on failure
1031 **/
1032static int
1033i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1034{
1035 int err, vector_threshold;
1036
1037 /* We'll want at least 3 (vector_threshold):
1038 * 0) Other (Admin Queue and link, mostly)
1039 * 1) TxQ[0] Cleanup
1040 * 2) RxQ[0] Cleanup
1041 */
1042 vector_threshold = MIN_MSIX_COUNT;
1043
1044 /* The more we get, the more we will assign to Tx/Rx Cleanup
1045 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1046 * Right now, we simply care about how many we'll get; we'll
1047 * set them up later while requesting irq's.
1048 */
fc2f2f5d
AG		 1049 err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1050 vector_threshold, vectors);
1051 if (err < 0) {
80e72893 1052 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
5eae00c5
GR		 1053 kfree(adapter->msix_entries);
1054 adapter->msix_entries = NULL;
fc2f2f5d 1055 return err;
5eae00c5 1056 }
fc2f2f5d
AG		 1057
1058 /* Adjust for only the vectors we'll use, which is minimum
1059 * of max_msix_q_vectors + NONQ_VECS, or the number of
1060 * vectors we were allocated.
1061 */
1062 adapter->num_msix_vectors = err;
1063 return 0;
5eae00c5
GR		 1064}
1065
1066/**
1067 * i40evf_free_queues - Free memory for all rings
1068 * @adapter: board private structure to initialize
1069 *
1070 * Free all of the memory associated with queue pairs.
1071 **/
1072static void i40evf_free_queues(struct i40evf_adapter *adapter)
1073{
1074 int i;
1075
1076 if (!adapter->vsi_res)
1077 return;
cc052927 1078 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5
GR		 1079 if (adapter->tx_rings[i])
1080 kfree_rcu(adapter->tx_rings[i], rcu);
1081 adapter->tx_rings[i] = NULL;
1082 adapter->rx_rings[i] = NULL;
1083 }
1084}
1085
1086/**
1087 * i40evf_alloc_queues - Allocate memory for all rings
1088 * @adapter: board private structure to initialize
1089 *
1090 * We allocate one ring per queue at run-time since we don't know the
1091 * number of queues at compile-time. The polling_netdev array is
1092 * intended for Multiqueue, but should work fine with a single queue.
1093 **/
1094static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1095{
1096 int i;
1097
cc052927 1098 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5
GR		 1099 struct i40e_ring *tx_ring;
1100 struct i40e_ring *rx_ring;
1101
75a64435 1102 tx_ring = kzalloc(sizeof(*tx_ring) * 2, GFP_KERNEL);
5eae00c5
GR		 1103 if (!tx_ring)
1104 goto err_out;
1105
1106 tx_ring->queue_index = i;
1107 tx_ring->netdev = adapter->netdev;
1108 tx_ring->dev = &adapter->pdev->dev;
d732a184 1109 tx_ring->count = adapter->tx_desc_count;
5eae00c5
GR		 1110 adapter->tx_rings[i] = tx_ring;
1111
1112 rx_ring = &tx_ring[1];
1113 rx_ring->queue_index = i;
1114 rx_ring->netdev = adapter->netdev;
1115 rx_ring->dev = &adapter->pdev->dev;
d732a184 1116 rx_ring->count = adapter->rx_desc_count;
5eae00c5
GR		 1117 adapter->rx_rings[i] = rx_ring;
1118 }
1119
1120 return 0;
1121
1122err_out:
1123 i40evf_free_queues(adapter);
1124 return -ENOMEM;
1125}
1126
1127/**
1128 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1129 * @adapter: board private structure to initialize
1130 *
1131 * Attempt to configure the interrupts using the best available
1132 * capabilities of the hardware and the kernel.
1133 **/
1134static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1135{
1136 int vector, v_budget;
1137 int pairs = 0;
1138 int err = 0;
1139
1140 if (!adapter->vsi_res) {
1141 err = -EIO;
1142 goto out;
1143 }
cc052927 1144 pairs = adapter->num_active_queues;
5eae00c5
GR		 1145
1146 /* It's easy to be greedy for MSI-X vectors, but it really
1147 * doesn't do us much good if we have a lot more vectors
1148 * than CPU's. So let's be conservative and only ask for
1149 * (roughly) twice the number of vectors as there are CPU's.
1150 */
30a500e2
MW		 1151 v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1152 v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
5eae00c5 1153
5eae00c5
GR		 1154 adapter->msix_entries = kcalloc(v_budget,
1155 sizeof(struct msix_entry), GFP_KERNEL);
1156 if (!adapter->msix_entries) {
1157 err = -ENOMEM;
1158 goto out;
1159 }
1160
1161 for (vector = 0; vector < v_budget; vector++)
1162 adapter->msix_entries[vector].entry = vector;
1163
1164 i40evf_acquire_msix_vectors(adapter, v_budget);
1165
1166out:
1167 adapter->netdev->real_num_tx_queues = pairs;
1168 return err;
1169}
1170
1171/**
1172 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1173 * @adapter: board private structure to initialize
1174 *
1175 * We allocate one q_vector per queue interrupt. If allocation fails we
1176 * return -ENOMEM.
1177 **/
1178static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1179{
1180 int q_idx, num_q_vectors;
1181 struct i40e_q_vector *q_vector;
1182
1183 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1184
1185 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
75a64435 1186 q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL);
5eae00c5
GR		 1187 if (!q_vector)
1188 goto err_out;
1189 q_vector->adapter = adapter;
1190 q_vector->vsi = &adapter->vsi;
1191 q_vector->v_idx = q_idx;
1192 netif_napi_add(adapter->netdev, &q_vector->napi,
75a64435 1193 i40evf_napi_poll, NAPI_POLL_WEIGHT);
5eae00c5
GR		 1194 adapter->q_vector[q_idx] = q_vector;
1195 }
1196
1197 return 0;
1198
1199err_out:
1200 while (q_idx) {
1201 q_idx--;
1202 q_vector = adapter->q_vector[q_idx];
1203 netif_napi_del(&q_vector->napi);
1204 kfree(q_vector);
1205 adapter->q_vector[q_idx] = NULL;
1206 }
1207 return -ENOMEM;
1208}
1209
1210/**
1211 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1212 * @adapter: board private structure to initialize
1213 *
1214 * This function frees the memory allocated to the q_vectors. In addition if
1215 * NAPI is enabled it will delete any references to the NAPI struct prior
1216 * to freeing the q_vector.
1217 **/
1218static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1219{
1220 int q_idx, num_q_vectors;
1221 int napi_vectors;
1222
1223 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
cc052927 1224 napi_vectors = adapter->num_active_queues;
5eae00c5
GR		 1225
1226 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1227 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1228
1229 adapter->q_vector[q_idx] = NULL;
1230 if (q_idx < napi_vectors)
1231 netif_napi_del(&q_vector->napi);
1232 kfree(q_vector);
1233 }
1234}
1235
1236/**
1237 * i40evf_reset_interrupt_capability - Reset MSIX setup
1238 * @adapter: board private structure
1239 *
1240 **/
1241void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1242{
1243 pci_disable_msix(adapter->pdev);
1244 kfree(adapter->msix_entries);
1245 adapter->msix_entries = NULL;
5eae00c5
GR		 1246}
1247
1248/**
1249 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1250 * @adapter: board private structure to initialize
1251 *
1252 **/
1253int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1254{
1255 int err;
1256
1257 err = i40evf_set_interrupt_capability(adapter);
1258 if (err) {
1259 dev_err(&adapter->pdev->dev,
1260 "Unable to setup interrupt capabilities\n");
1261 goto err_set_interrupt;
1262 }
1263
1264 err = i40evf_alloc_q_vectors(adapter);
1265 if (err) {
1266 dev_err(&adapter->pdev->dev,
1267 "Unable to allocate memory for queue vectors\n");
1268 goto err_alloc_q_vectors;
1269 }
1270
1271 err = i40evf_alloc_queues(adapter);
1272 if (err) {
1273 dev_err(&adapter->pdev->dev,
1274 "Unable to allocate memory for queues\n");
1275 goto err_alloc_queues;
1276 }
1277
1278 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
75a64435
MW		 1279 (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1280 adapter->num_active_queues);
5eae00c5
GR		 1281
1282 return 0;
1283err_alloc_queues:
1284 i40evf_free_q_vectors(adapter);
1285err_alloc_q_vectors:
1286 i40evf_reset_interrupt_capability(adapter);
1287err_set_interrupt:
1288 return err;
1289}
1290
1291/**
1292 * i40evf_watchdog_timer - Periodic call-back timer
1293 * @data: pointer to adapter disguised as unsigned long
1294 **/
1295static void i40evf_watchdog_timer(unsigned long data)
1296{
1297 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
75a64435 1298
5eae00c5
GR		 1299 schedule_work(&adapter->watchdog_task);
1300 /* timer will be rescheduled in watchdog task */
1301}
1302
1303/**
1304 * i40evf_watchdog_task - Periodic call-back task
1305 * @work: pointer to work_struct
1306 **/
1307static void i40evf_watchdog_task(struct work_struct *work)
1308{
1309 struct i40evf_adapter *adapter = container_of(work,
75a64435
MW		 1310 struct i40evf_adapter,
1311 watchdog_task);
5eae00c5 1312 struct i40e_hw *hw = &adapter->hw;
fd35886a 1313 uint32_t rstat_val;
5eae00c5 1314
ef8693eb
MW		 1315 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1316 goto restart_watchdog;
1317
1318 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
fd35886a
AS		 1319 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1320 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1321 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1322 (rstat_val == I40E_VFR_COMPLETED)) {
ef8693eb
MW		 1323 /* A chance for redemption! */
1324 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1325 adapter->state = __I40EVF_STARTUP;
1326 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1327 schedule_delayed_work(&adapter->init_task, 10);
1328 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1329 &adapter->crit_section);
1330 /* Don't reschedule the watchdog, since we've restarted
1331 * the init task. When init_task contacts the PF and
1332 * gets everything set up again, it'll restart the
1333 * watchdog for us. Down, boy. Sit. Stay. Woof.
1334 */
1335 return;
1336 }
ef8693eb
MW		 1337 adapter->aq_required = 0;
1338 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5 1339 goto watchdog_done;
ef8693eb 1340 }
5eae00c5 1341
ef8693eb
MW		 1342 if ((adapter->state < __I40EVF_DOWN) ||
1343 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
5eae00c5
GR		 1344 goto watchdog_done;
1345
ef8693eb 1346 /* check for reset */
fd35886a 1347 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
75a64435 1348 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
ef8693eb 1349 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
fd35886a
AS		 1350 (rstat_val != I40E_VFR_VFACTIVE) &&
1351 (rstat_val != I40E_VFR_COMPLETED)) {
5eae00c5 1352 adapter->state = __I40EVF_RESETTING;
ef8693eb 1353 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
249c8b8d 1354 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
5eae00c5 1355 schedule_work(&adapter->reset_task);
ef8693eb
MW		 1356 adapter->aq_required = 0;
1357 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 1358 goto watchdog_done;
1359 }
1360
1361 /* Process admin queue tasks. After init, everything gets done
1362 * here so we don't race on the admin queue.
1363 */
ed636960 1364 if (adapter->current_op) {
0758e7cb
MW		 1365 if (!i40evf_asq_done(hw)) {
1366 dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1367 i40evf_send_api_ver(adapter);
1368 }
5eae00c5 1369 goto watchdog_done;
0758e7cb 1370 }
5eae00c5 1371
e284fc88
MW		 1372 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1373 i40evf_disable_queues(adapter);
1374 goto watchdog_done;
1375 }
1376
5eae00c5
GR		 1377 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1378 i40evf_map_queues(adapter);
1379 goto watchdog_done;
1380 }
1381
1382 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1383 i40evf_add_ether_addrs(adapter);
1384 goto watchdog_done;
1385 }
1386
1387 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1388 i40evf_add_vlans(adapter);
1389 goto watchdog_done;
1390 }
1391
1392 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1393 i40evf_del_ether_addrs(adapter);
1394 goto watchdog_done;
1395 }
1396
1397 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1398 i40evf_del_vlans(adapter);
1399 goto watchdog_done;
1400 }
1401
5eae00c5
GR		 1402 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1403 i40evf_configure_queues(adapter);
1404 goto watchdog_done;
1405 }
1406
1407 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1408 i40evf_enable_queues(adapter);
1409 goto watchdog_done;
1410 }
1411
1412 if (adapter->state == __I40EVF_RUNNING)
1413 i40evf_request_stats(adapter);
5eae00c5 1414watchdog_done:
4870e176
MW		 1415 if (adapter->state == __I40EVF_RUNNING) {
1416 i40evf_irq_enable_queues(adapter, ~0);
1417 i40evf_fire_sw_int(adapter, 0xFF);
1418 } else {
1419 i40evf_fire_sw_int(adapter, 0x1);
1420 }
1421
ef8693eb
MW		 1422 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1423restart_watchdog:
d3e2edb7
AS		 1424 if (adapter->state == __I40EVF_REMOVE)
1425 return;
5eae00c5
GR		 1426 if (adapter->aq_required)
1427 mod_timer(&adapter->watchdog_timer,
1428 jiffies + msecs_to_jiffies(20));
1429 else
1430 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
5eae00c5
GR		 1431 schedule_work(&adapter->adminq_task);
1432}
1433
5b7af02c 1434/**
9a9c8ae1 1435 * i40evf_configure_rss - Prepare for RSS
5eae00c5
GR		 1436 * @adapter: board private structure
1437 **/
1438static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1439{
22f258a1 1440 u32 rss_key[I40E_VFQF_HKEY_MAX_INDEX + 1];
5eae00c5 1441 struct i40e_hw *hw = &adapter->hw;
9a9c8ae1 1442 u32 cqueue = 0;
5eae00c5
GR		 1443 u32 lut = 0;
1444 int i, j;
1445 u64 hena;
1446
cc052927 1447 /* Hash type is configured by the PF - we just supply the key */
22f258a1 1448 netdev_rss_key_fill(rss_key, sizeof(rss_key));
9a9c8ae1
ASJ		 1449
1450 /* Fill out hash function seed */
5eae00c5 1451 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
22f258a1 1452 wr32(hw, I40E_VFQF_HKEY(i), rss_key[i]);
5eae00c5
GR		 1453
1454 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1455 hena = I40E_DEFAULT_RSS_HENA;
1456 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1457 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1458
1459 /* Populate the LUT with max no. of queues in round robin fashion */
96d47704 1460 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
9a9c8ae1
ASJ		 1461 lut = 0;
1462 for (j = 0; j < 4; j++) {
1463 if (cqueue == adapter->vsi_res->num_queue_pairs)
1464 cqueue = 0;
1465 lut |= ((cqueue) << (8 * j));
1466 cqueue++;
1467 }
96d47704 1468 wr32(hw, I40E_VFQF_HLUT(i), lut);
5eae00c5
GR		 1469 }
1470 i40e_flush(hw);
1471}
1472
ef8693eb
MW		 1473#define I40EVF_RESET_WAIT_MS 100
1474#define I40EVF_RESET_WAIT_COUNT 200
5eae00c5
GR		 1475/**
1476 * i40evf_reset_task - Call-back task to handle hardware reset
1477 * @work: pointer to work_struct
1478 *
1479 * During reset we need to shut down and reinitialize the admin queue
1480 * before we can use it to communicate with the PF again. We also clear
1481 * and reinit the rings because that context is lost as well.
1482 **/
1483static void i40evf_reset_task(struct work_struct *work)
1484{
ef8693eb
MW		 1485 struct i40evf_adapter *adapter = container_of(work,
1486 struct i40evf_adapter,
1487 reset_task);
ac833bbf 1488 struct net_device *netdev = adapter->netdev;
5eae00c5 1489 struct i40e_hw *hw = &adapter->hw;
ac833bbf 1490 struct i40evf_mac_filter *f;
5eae00c5 1491 uint32_t rstat_val;
ac833bbf 1492 int i = 0, err;
5eae00c5
GR		 1493
1494 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1495 &adapter->crit_section))
f98a2006 1496 usleep_range(500, 1000);
3526d800
MW		 1497
1498 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1499 dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
1500 i40evf_request_reset(adapter);
1501 }
1502
ef8693eb
MW		 1503 /* poll until we see the reset actually happen */
1504 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1505 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1506 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
fd35886a
AS		 1507 if ((rstat_val != I40E_VFR_VFACTIVE) &&
1508 (rstat_val != I40E_VFR_COMPLETED))
ef8693eb 1509 break;
c88e38cc 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;
c88e38cc 1524 msleep(I40EVF_RESET_WAIT_MS);
5eae00c5 1525 }
ef8693eb 1526 if (i == I40EVF_RESET_WAIT_COUNT) {
6ba36a24
MW		 1527 struct i40evf_mac_filter *f, *ftmp;
1528 struct i40evf_vlan_filter *fv, *fvtmp;
1529
5eae00c5 1530 /* reset never finished */
80e72893 1531 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
ef8693eb
MW		 1532 rstat_val);
1533 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1534
169f4076
MW		 1535 if (netif_running(adapter->netdev)) {
1536 set_bit(__I40E_DOWN, &adapter->vsi.state);
ac833bbf
MW		 1537 i40evf_irq_disable(adapter);
1538 i40evf_napi_disable_all(adapter);
1539 netif_tx_disable(netdev);
1540 netif_tx_stop_all_queues(netdev);
1541 netif_carrier_off(netdev);
169f4076
MW		 1542 i40evf_free_traffic_irqs(adapter);
1543 i40evf_free_all_tx_resources(adapter);
1544 i40evf_free_all_rx_resources(adapter);
1545 }
6ba36a24
MW		 1546
1547 /* Delete all of the filters, both MAC and VLAN. */
1548 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1549 list) {
1550 list_del(&f->list);
1551 kfree(f);
1552 }
1553 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1554 list) {
1555 list_del(&fv->list);
1556 kfree(fv);
1557 }
1558
ef8693eb
MW		 1559 i40evf_free_misc_irq(adapter);
1560 i40evf_reset_interrupt_capability(adapter);
1561 i40evf_free_queues(adapter);
d31944d6 1562 i40evf_free_q_vectors(adapter);
ef8693eb
MW		 1563 kfree(adapter->vf_res);
1564 i40evf_shutdown_adminq(hw);
1565 adapter->netdev->flags &= ~IFF_UP;
1566 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1567 return; /* Do not attempt to reinit. It's dead, Jim. */
5eae00c5 1568 }
ef8693eb
MW		 1569
1570continue_reset:
1571 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1572
ac833bbf 1573 i40evf_irq_disable(adapter);
ac833bbf 1574
3c8e0b98
MW		 1575 if (netif_running(adapter->netdev)) {
1576 i40evf_napi_disable_all(adapter);
1577 netif_tx_disable(netdev);
1578 netif_tx_stop_all_queues(netdev);
1579 netif_carrier_off(netdev);
1580 }
ac833bbf 1581
5eae00c5
GR		 1582 adapter->state = __I40EVF_RESETTING;
1583
1584 /* kill and reinit the admin queue */
1585 if (i40evf_shutdown_adminq(hw))
ac833bbf
MW		 1586 dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
1587 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 1588 err = i40evf_init_adminq(hw);
1589 if (err)
ac833bbf
MW		 1590 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1591 err);
5eae00c5 1592
5eae00c5 1593 i40evf_map_queues(adapter);
ac833bbf
MW		 1594
1595 /* re-add all MAC filters */
1596 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1597 f->add = true;
1598 }
1599 /* re-add all VLAN filters */
1600 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1601 f->add = true;
1602 }
1603 adapter->aq_required = I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1604 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
5eae00c5
GR		 1605 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1606
1607 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1608
1609 if (netif_running(adapter->netdev)) {
1610 /* allocate transmit descriptors */
1611 err = i40evf_setup_all_tx_resources(adapter);
1612 if (err)
1613 goto reset_err;
1614
1615 /* allocate receive descriptors */
1616 err = i40evf_setup_all_rx_resources(adapter);
1617 if (err)
1618 goto reset_err;
1619
1620 i40evf_configure(adapter);
1621
1622 err = i40evf_up_complete(adapter);
1623 if (err)
1624 goto reset_err;
1625
1626 i40evf_irq_enable(adapter, true);
1627 }
1628 return;
1629reset_err:
80e72893 1630 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
5eae00c5
GR		 1631 i40evf_close(adapter->netdev);
1632}
1633
1634/**
1635 * i40evf_adminq_task - worker thread to clean the admin queue
1636 * @work: pointer to work_struct containing our data
1637 **/
1638static void i40evf_adminq_task(struct work_struct *work)
1639{
1640 struct i40evf_adapter *adapter =
1641 container_of(work, struct i40evf_adapter, adminq_task);
1642 struct i40e_hw *hw = &adapter->hw;
1643 struct i40e_arq_event_info event;
1644 struct i40e_virtchnl_msg *v_msg;
1645 i40e_status ret;
912257e5 1646 u32 val, oldval;
5eae00c5
GR		 1647 u16 pending;
1648
ef8693eb 1649 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
7235448c 1650 goto out;
ef8693eb 1651
1001dc37
MW		 1652 event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1653 event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
249c8b8d 1654 if (!event.msg_buf)
7235448c 1655 goto out;
249c8b8d 1656
5eae00c5
GR		 1657 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1658 do {
1659 ret = i40evf_clean_arq_element(hw, &event, &pending);
8b011ebb 1660 if (ret || !v_msg->v_opcode)
5eae00c5
GR		 1661 break; /* No event to process or error cleaning ARQ */
1662
1663 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1664 v_msg->v_retval, event.msg_buf,
1001dc37 1665 event.msg_len);
75a64435 1666 if (pending != 0)
5eae00c5 1667 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
5eae00c5
GR		 1668 } while (pending);
1669
912257e5
MW		 1670 /* check for error indications */
1671 val = rd32(hw, hw->aq.arq.len);
1672 oldval = val;
1673 if (val & I40E_VF_ARQLEN_ARQVFE_MASK) {
1674 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1675 val &= ~I40E_VF_ARQLEN_ARQVFE_MASK;
1676 }
1677 if (val & I40E_VF_ARQLEN_ARQOVFL_MASK) {
1678 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1679 val &= ~I40E_VF_ARQLEN_ARQOVFL_MASK;
1680 }
1681 if (val & I40E_VF_ARQLEN_ARQCRIT_MASK) {
1682 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1683 val &= ~I40E_VF_ARQLEN_ARQCRIT_MASK;
1684 }
1685 if (oldval != val)
1686 wr32(hw, hw->aq.arq.len, val);
1687
1688 val = rd32(hw, hw->aq.asq.len);
1689 oldval = val;
1690 if (val & I40E_VF_ATQLEN_ATQVFE_MASK) {
1691 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1692 val &= ~I40E_VF_ATQLEN_ATQVFE_MASK;
1693 }
1694 if (val & I40E_VF_ATQLEN_ATQOVFL_MASK) {
1695 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1696 val &= ~I40E_VF_ATQLEN_ATQOVFL_MASK;
1697 }
1698 if (val & I40E_VF_ATQLEN_ATQCRIT_MASK) {
1699 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1700 val &= ~I40E_VF_ATQLEN_ATQCRIT_MASK;
1701 }
1702 if (oldval != val)
1703 wr32(hw, hw->aq.asq.len, val);
1704
7235448c
MW		 1705 kfree(event.msg_buf);
1706out:
5eae00c5
GR		 1707 /* re-enable Admin queue interrupt cause */
1708 i40evf_misc_irq_enable(adapter);
5eae00c5
GR		 1709}
1710
1711/**
1712 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1713 * @adapter: board private structure
1714 *
1715 * Free all transmit software resources
1716 **/
e284fc88 1717void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
5eae00c5
GR		 1718{
1719 int i;
1720
cc052927 1721 for (i = 0; i < adapter->num_active_queues; i++)
5eae00c5
GR		 1722 if (adapter->tx_rings[i]->desc)
1723 i40evf_free_tx_resources(adapter->tx_rings[i]);
5eae00c5
GR		 1724}
1725
1726/**
1727 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1728 * @adapter: board private structure
1729 *
1730 * If this function returns with an error, then it's possible one or
1731 * more of the rings is populated (while the rest are not). It is the
1732 * callers duty to clean those orphaned rings.
1733 *
1734 * Return 0 on success, negative on failure
1735 **/
1736static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1737{
1738 int i, err = 0;
1739
cc052927 1740 for (i = 0; i < adapter->num_active_queues; i++) {
d732a184 1741 adapter->tx_rings[i]->count = adapter->tx_desc_count;
5eae00c5
GR		 1742 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1743 if (!err)
1744 continue;
1745 dev_err(&adapter->pdev->dev,
1746 "%s: Allocation for Tx Queue %u failed\n",
1747 __func__, i);
1748 break;
1749 }
1750
1751 return err;
1752}
1753
1754/**
1755 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1756 * @adapter: board private structure
1757 *
1758 * If this function returns with an error, then it's possible one or
1759 * more of the rings is populated (while the rest are not). It is the
1760 * callers duty to clean those orphaned rings.
1761 *
1762 * Return 0 on success, negative on failure
1763 **/
1764static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1765{
1766 int i, err = 0;
1767
cc052927 1768 for (i = 0; i < adapter->num_active_queues; i++) {
d732a184 1769 adapter->rx_rings[i]->count = adapter->rx_desc_count;
5eae00c5
GR		 1770 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1771 if (!err)
1772 continue;
1773 dev_err(&adapter->pdev->dev,
1774 "%s: Allocation for Rx Queue %u failed\n",
1775 __func__, i);
1776 break;
1777 }
1778 return err;
1779}
1780
1781/**
1782 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1783 * @adapter: board private structure
1784 *
1785 * Free all receive software resources
1786 **/
e284fc88 1787void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
5eae00c5
GR		 1788{
1789 int i;
1790
cc052927 1791 for (i = 0; i < adapter->num_active_queues; i++)
5eae00c5
GR		 1792 if (adapter->rx_rings[i]->desc)
1793 i40evf_free_rx_resources(adapter->rx_rings[i]);
1794}
1795
1796/**
1797 * i40evf_open - Called when a network interface is made active
1798 * @netdev: network interface device structure
1799 *
1800 * Returns 0 on success, negative value on failure
1801 *
1802 * The open entry point is called when a network interface is made
1803 * active by the system (IFF_UP). At this point all resources needed
1804 * for transmit and receive operations are allocated, the interrupt
1805 * handler is registered with the OS, the watchdog timer is started,
1806 * and the stack is notified that the interface is ready.
1807 **/
1808static int i40evf_open(struct net_device *netdev)
1809{
1810 struct i40evf_adapter *adapter = netdev_priv(netdev);
1811 int err;
1812
ef8693eb
MW		 1813 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1814 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1815 return -EIO;
1816 }
e284fc88 1817 if (adapter->state != __I40EVF_DOWN || adapter->aq_required)
5eae00c5
GR		 1818 return -EBUSY;
1819
1820 /* allocate transmit descriptors */
1821 err = i40evf_setup_all_tx_resources(adapter);
1822 if (err)
1823 goto err_setup_tx;
1824
1825 /* allocate receive descriptors */
1826 err = i40evf_setup_all_rx_resources(adapter);
1827 if (err)
1828 goto err_setup_rx;
1829
1830 /* clear any pending interrupts, may auto mask */
1831 err = i40evf_request_traffic_irqs(adapter, netdev->name);
1832 if (err)
1833 goto err_req_irq;
1834
1835 i40evf_configure(adapter);
1836
1837 err = i40evf_up_complete(adapter);
1838 if (err)
1839 goto err_req_irq;
1840
1841 i40evf_irq_enable(adapter, true);
1842
1843 return 0;
1844
1845err_req_irq:
1846 i40evf_down(adapter);
1847 i40evf_free_traffic_irqs(adapter);
1848err_setup_rx:
1849 i40evf_free_all_rx_resources(adapter);
1850err_setup_tx:
1851 i40evf_free_all_tx_resources(adapter);
1852
1853 return err;
1854}
1855
1856/**
1857 * i40evf_close - Disables a network interface
1858 * @netdev: network interface device structure
1859 *
1860 * Returns 0, this is not allowed to fail
1861 *
1862 * The close entry point is called when an interface is de-activated
1863 * by the OS. The hardware is still under the drivers control, but
1864 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1865 * are freed, along with all transmit and receive resources.
1866 **/
1867static int i40evf_close(struct net_device *netdev)
1868{
1869 struct i40evf_adapter *adapter = netdev_priv(netdev);
1870
ef8693eb
MW		 1871 if (adapter->state <= __I40EVF_DOWN)
1872 return 0;
1873
ef8693eb 1874
5eae00c5
GR		 1875 set_bit(__I40E_DOWN, &adapter->vsi.state);
1876
1877 i40evf_down(adapter);
ddf0b3a6 1878 adapter->state = __I40EVF_DOWN;
5eae00c5
GR		 1879 i40evf_free_traffic_irqs(adapter);
1880
5eae00c5
GR		 1881 return 0;
1882}
1883
1884/**
1885 * i40evf_get_stats - Get System Network Statistics
1886 * @netdev: network interface device structure
1887 *
1888 * Returns the address of the device statistics structure.
1889 * The statistics are actually updated from the timer callback.
1890 **/
1891static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1892{
1893 struct i40evf_adapter *adapter = netdev_priv(netdev);
1894
1895 /* only return the current stats */
1896 return &adapter->net_stats;
1897}
1898
1899/**
1900 * i40evf_reinit_locked - Software reinit
1901 * @adapter: board private structure
1902 *
1903 * Reinititalizes the ring structures in response to a software configuration
1904 * change. Roughly the same as close followed by open, but skips releasing
1905 * and reallocating the interrupts.
1906 **/
1907void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1908{
1909 struct net_device *netdev = adapter->netdev;
1910 int err;
1911
1912 WARN_ON(in_interrupt());
1913
5eae00c5
GR		 1914 i40evf_down(adapter);
1915
1916 /* allocate transmit descriptors */
1917 err = i40evf_setup_all_tx_resources(adapter);
1918 if (err)
1919 goto err_reinit;
1920
1921 /* allocate receive descriptors */
1922 err = i40evf_setup_all_rx_resources(adapter);
1923 if (err)
1924 goto err_reinit;
1925
1926 i40evf_configure(adapter);
1927
1928 err = i40evf_up_complete(adapter);
1929 if (err)
1930 goto err_reinit;
1931
1932 i40evf_irq_enable(adapter, true);
1933 return;
1934
1935err_reinit:
80e72893 1936 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
5eae00c5
GR		 1937 i40evf_close(netdev);
1938}
1939
1940/**
1941 * i40evf_change_mtu - Change the Maximum Transfer Unit
1942 * @netdev: network interface device structure
1943 * @new_mtu: new value for maximum frame size
1944 *
1945 * Returns 0 on success, negative on failure
1946 **/
1947static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1948{
1949 struct i40evf_adapter *adapter = netdev_priv(netdev);
1950 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1951
1952 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1953 return -EINVAL;
1954
1955 /* must set new MTU before calling down or up */
1956 netdev->mtu = new_mtu;
1957 i40evf_reinit_locked(adapter);
1958 return 0;
1959}
1960
1961static const struct net_device_ops i40evf_netdev_ops = {
1962 .ndo_open = i40evf_open,
1963 .ndo_stop = i40evf_close,
1964 .ndo_start_xmit = i40evf_xmit_frame,
1965 .ndo_get_stats = i40evf_get_stats,
1966 .ndo_set_rx_mode = i40evf_set_rx_mode,
1967 .ndo_validate_addr = eth_validate_addr,
1968 .ndo_set_mac_address = i40evf_set_mac,
1969 .ndo_change_mtu = i40evf_change_mtu,
1970 .ndo_tx_timeout = i40evf_tx_timeout,
1971 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
1972 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
1973};
1974
1975/**
1976 * i40evf_check_reset_complete - check that VF reset is complete
1977 * @hw: pointer to hw struct
1978 *
1979 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1980 **/
1981static int i40evf_check_reset_complete(struct i40e_hw *hw)
1982{
1983 u32 rstat;
1984 int i;
1985
1986 for (i = 0; i < 100; i++) {
fd35886a
AS		 1987 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
1988 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1989 if ((rstat == I40E_VFR_VFACTIVE) ||
1990 (rstat == I40E_VFR_COMPLETED))
5eae00c5 1991 return 0;
f98a2006 1992 usleep_range(10, 20);
5eae00c5
GR		 1993 }
1994 return -EBUSY;
1995}
1996
1997/**
1998 * i40evf_init_task - worker thread to perform delayed initialization
1999 * @work: pointer to work_struct containing our data
2000 *
2001 * This task completes the work that was begun in probe. Due to the nature
2002 * of VF-PF communications, we may need to wait tens of milliseconds to get
dbedd44e 2003 * responses back from the PF. Rather than busy-wait in probe and bog down the
5eae00c5
GR		 2004 * whole system, we'll do it in a task so we can sleep.
2005 * This task only runs during driver init. Once we've established
2006 * communications with the PF driver and set up our netdev, the watchdog
2007 * takes over.
2008 **/
2009static void i40evf_init_task(struct work_struct *work)
2010{
2011 struct i40evf_adapter *adapter = container_of(work,
2012 struct i40evf_adapter,
2013 init_task.work);
2014 struct net_device *netdev = adapter->netdev;
2015 struct i40evf_mac_filter *f;
2016 struct i40e_hw *hw = &adapter->hw;
2017 struct pci_dev *pdev = adapter->pdev;
2018 int i, err, bufsz;
2019
2020 switch (adapter->state) {
2021 case __I40EVF_STARTUP:
2022 /* driver loaded, probe complete */
ef8693eb
MW		 2023 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2024 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
5eae00c5
GR		 2025 err = i40e_set_mac_type(hw);
2026 if (err) {
c2a137cb
MW		 2027 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2028 err);
2619ef47 2029 goto err;
5eae00c5
GR		 2030 }
2031 err = i40evf_check_reset_complete(hw);
2032 if (err) {
0d9c7ea8 2033 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
75a64435 2034 err);
5eae00c5
GR		 2035 goto err;
2036 }
2037 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2038 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2039 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2040 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2041
2042 err = i40evf_init_adminq(hw);
2043 if (err) {
c2a137cb
MW		 2044 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2045 err);
5eae00c5
GR		 2046 goto err;
2047 }
2048 err = i40evf_send_api_ver(adapter);
2049 if (err) {
10bdd67b 2050 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
5eae00c5
GR		 2051 i40evf_shutdown_adminq(hw);
2052 goto err;
2053 }
2054 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2055 goto restart;
5eae00c5 2056 case __I40EVF_INIT_VERSION_CHECK:
10bdd67b 2057 if (!i40evf_asq_done(hw)) {
80e72893 2058 dev_err(&pdev->dev, "Admin queue command never completed\n");
906a6937
MW		 2059 i40evf_shutdown_adminq(hw);
2060 adapter->state = __I40EVF_STARTUP;
5eae00c5 2061 goto err;
10bdd67b 2062 }
5eae00c5
GR		 2063
2064 /* aq msg sent, awaiting reply */
2065 err = i40evf_verify_api_ver(adapter);
2066 if (err) {
d4f82fd3 2067 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
56f9920a 2068 err = i40evf_send_api_ver(adapter);
5eae00c5
GR		 2069 goto err;
2070 }
2071 err = i40evf_send_vf_config_msg(adapter);
2072 if (err) {
3f2ab172 2073 dev_err(&pdev->dev, "Unable to send config request (%d)\n",
5eae00c5
GR		 2074 err);
2075 goto err;
2076 }
2077 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2078 goto restart;
5eae00c5
GR		 2079 case __I40EVF_INIT_GET_RESOURCES:
2080 /* aq msg sent, awaiting reply */
2081 if (!adapter->vf_res) {
2082 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2083 (I40E_MAX_VF_VSI *
2084 sizeof(struct i40e_virtchnl_vsi_resource));
2085 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
c2a137cb 2086 if (!adapter->vf_res)
5eae00c5 2087 goto err;
5eae00c5
GR		 2088 }
2089 err = i40evf_get_vf_config(adapter);
906a6937 2090 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
906a6937
MW		 2091 err = i40evf_send_vf_config_msg(adapter);
2092 goto err;
2093 }
5eae00c5 2094 if (err) {
c2a137cb
MW		 2095 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2096 err);
5eae00c5
GR		 2097 goto err_alloc;
2098 }
2099 adapter->state = __I40EVF_INIT_SW;
2100 break;
2101 default:
2102 goto err_alloc;
2103 }
2104 /* got VF config message back from PF, now we can parse it */
2105 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2106 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2107 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2108 }
2109 if (!adapter->vsi_res) {
c2a137cb 2110 dev_err(&pdev->dev, "No LAN VSI found\n");
5eae00c5
GR		 2111 goto err_alloc;
2112 }
2113
2114 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2115
5eae00c5
GR		 2116 netdev->netdev_ops = &i40evf_netdev_ops;
2117 i40evf_set_ethtool_ops(netdev);
2118 netdev->watchdog_timeo = 5 * HZ;
dbbd8111
MW		 2119 netdev->features |= NETIF_F_HIGHDMA |
2120 NETIF_F_SG |
5eae00c5
GR		 2121 NETIF_F_IP_CSUM |
2122 NETIF_F_SCTP_CSUM |
2123 NETIF_F_IPV6_CSUM |
2124 NETIF_F_TSO |
2125 NETIF_F_TSO6 |
3415e8ce 2126 NETIF_F_RXCSUM |
5eae00c5
GR		 2127 NETIF_F_GRO;
2128
2129 if (adapter->vf_res->vf_offload_flags
2130 & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2131 netdev->vlan_features = netdev->features;
2132 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2133 NETIF_F_HW_VLAN_CTAG_RX |
2134 NETIF_F_HW_VLAN_CTAG_FILTER;
2135 }
2136
3415e8ce
GR		 2137 /* copy netdev features into list of user selectable features */
2138 netdev->hw_features |= netdev->features;
2139 netdev->hw_features &= ~NETIF_F_RXCSUM;
2140
5eae00c5 2141 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
b34f90e7 2142 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
c2a137cb 2143 adapter->hw.mac.addr);
5eae00c5
GR		 2144 random_ether_addr(adapter->hw.mac.addr);
2145 }
9a173901
GR		 2146 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2147 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
5eae00c5 2148
5eae00c5 2149 f = kzalloc(sizeof(*f), GFP_ATOMIC);
348d4994 2150 if (!f)
5eae00c5
GR		 2151 goto err_sw_init;
2152
9a173901 2153 ether_addr_copy(f->macaddr, adapter->hw.mac.addr);
5eae00c5
GR		 2154 f->add = true;
2155 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2156
2157 list_add(&f->list, &adapter->mac_filter_list);
2158
2159 init_timer(&adapter->watchdog_timer);
2160 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2161 adapter->watchdog_timer.data = (unsigned long)adapter;
2162 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2163
cc052927
MW		 2164 adapter->num_active_queues = min_t(int,
2165 adapter->vsi_res->num_queue_pairs,
2166 (int)(num_online_cpus()));
d732a184
MW		 2167 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2168 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
5eae00c5
GR		 2169 err = i40evf_init_interrupt_scheme(adapter);
2170 if (err)
2171 goto err_sw_init;
2172 i40evf_map_rings_to_vectors(adapter);
2173 i40evf_configure_rss(adapter);
2174 err = i40evf_request_misc_irq(adapter);
2175 if (err)
2176 goto err_sw_init;
2177
2178 netif_carrier_off(netdev);
2179
5eae00c5
GR		 2180 adapter->vsi.id = adapter->vsi_res->vsi_id;
2181 adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2182 adapter->vsi.back = adapter;
2183 adapter->vsi.base_vector = 1;
2184 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
ca99eb99
MW		 2185 adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2186 ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2187 adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2188 ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
5eae00c5
GR		 2189 adapter->vsi.netdev = adapter->netdev;
2190
ef8693eb
MW		 2191 if (!adapter->netdev_registered) {
2192 err = register_netdev(netdev);
2193 if (err)
2194 goto err_register;
2195 }
5eae00c5
GR		 2196
2197 adapter->netdev_registered = true;
2198
2199 netif_tx_stop_all_queues(netdev);
2200
b34f90e7 2201 dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
5eae00c5
GR		 2202 if (netdev->features & NETIF_F_GRO)
2203 dev_info(&pdev->dev, "GRO is enabled\n");
2204
2205 dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2206 adapter->state = __I40EVF_DOWN;
2207 set_bit(__I40E_DOWN, &adapter->vsi.state);
2208 i40evf_misc_irq_enable(adapter);
2209 return;
2210restart:
2211 schedule_delayed_work(&adapter->init_task,
2212 msecs_to_jiffies(50));
2213 return;
2214
2215err_register:
2216 i40evf_free_misc_irq(adapter);
2217err_sw_init:
2218 i40evf_reset_interrupt_capability(adapter);
5eae00c5
GR		 2219err_alloc:
2220 kfree(adapter->vf_res);
2221 adapter->vf_res = NULL;
2222err:
2223 /* Things went into the weeds, so try again later */
2224 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
80e72893 2225 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
ef8693eb 2226 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
5eae00c5
GR		 2227 return; /* do not reschedule */
2228 }
2229 schedule_delayed_work(&adapter->init_task, HZ * 3);
5eae00c5
GR		 2230}
2231
2232/**
2233 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2234 * @pdev: pci device structure
2235 **/
2236static void i40evf_shutdown(struct pci_dev *pdev)
2237{
2238 struct net_device *netdev = pci_get_drvdata(pdev);
00293fdc 2239 struct i40evf_adapter *adapter = netdev_priv(netdev);
5eae00c5
GR		 2240
2241 netif_device_detach(netdev);
2242
2243 if (netif_running(netdev))
2244 i40evf_close(netdev);
2245
00293fdc
MW		 2246 /* Prevent the watchdog from running. */
2247 adapter->state = __I40EVF_REMOVE;
2248 adapter->aq_required = 0;
00293fdc 2249
5eae00c5
GR		 2250#ifdef CONFIG_PM
2251 pci_save_state(pdev);
2252
2253#endif
2254 pci_disable_device(pdev);
2255}
2256
2257/**
2258 * i40evf_probe - Device Initialization Routine
2259 * @pdev: PCI device information struct
2260 * @ent: entry in i40evf_pci_tbl
2261 *
2262 * Returns 0 on success, negative on failure
2263 *
2264 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2265 * The OS initialization, configuring of the adapter private structure,
2266 * and a hardware reset occur.
2267 **/
2268static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2269{
2270 struct net_device *netdev;
2271 struct i40evf_adapter *adapter = NULL;
2272 struct i40e_hw *hw = NULL;
dbbd8111 2273 int err;
5eae00c5
GR		 2274
2275 err = pci_enable_device(pdev);
2276 if (err)
2277 return err;
2278
6494294f 2279 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
6494294f 2280 if (err) {
e3e3bfdd
JS		 2281 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2282 if (err) {
2283 dev_err(&pdev->dev,
2284 "DMA configuration failed: 0x%x\n", err);
2285 goto err_dma;
2286 }
5eae00c5
GR		 2287 }
2288
2289 err = pci_request_regions(pdev, i40evf_driver_name);
2290 if (err) {
2291 dev_err(&pdev->dev,
2292 "pci_request_regions failed 0x%x\n", err);
2293 goto err_pci_reg;
2294 }
2295
2296 pci_enable_pcie_error_reporting(pdev);
2297
2298 pci_set_master(pdev);
2299
2300 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2301 MAX_TX_QUEUES);
2302 if (!netdev) {
2303 err = -ENOMEM;
2304 goto err_alloc_etherdev;
2305 }
2306
2307 SET_NETDEV_DEV(netdev, &pdev->dev);
2308
2309 pci_set_drvdata(pdev, netdev);
2310 adapter = netdev_priv(netdev);
5eae00c5
GR		 2311
2312 adapter->netdev = netdev;
2313 adapter->pdev = pdev;
2314
2315 hw = &adapter->hw;
2316 hw->back = adapter;
2317
2318 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2319 adapter->state = __I40EVF_STARTUP;
2320
2321 /* Call save state here because it relies on the adapter struct. */
2322 pci_save_state(pdev);
2323
2324 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2325 pci_resource_len(pdev, 0));
2326 if (!hw->hw_addr) {
2327 err = -EIO;
2328 goto err_ioremap;
2329 }
2330 hw->vendor_id = pdev->vendor;
2331 hw->device_id = pdev->device;
2332 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2333 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2334 hw->subsystem_device_id = pdev->subsystem_device;
2335 hw->bus.device = PCI_SLOT(pdev->devfn);
2336 hw->bus.func = PCI_FUNC(pdev->devfn);
2337
8bb1a540
SK		 2338 INIT_LIST_HEAD(&adapter->mac_filter_list);
2339 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2340
5eae00c5
GR		 2341 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2342 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2343 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2344 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2345 schedule_delayed_work(&adapter->init_task, 10);
2346
2347 return 0;
2348
2349err_ioremap:
2350 free_netdev(netdev);
2351err_alloc_etherdev:
2352 pci_release_regions(pdev);
2353err_pci_reg:
2354err_dma:
2355 pci_disable_device(pdev);
2356 return err;
2357}
2358
2359#ifdef CONFIG_PM
2360/**
2361 * i40evf_suspend - Power management suspend routine
2362 * @pdev: PCI device information struct
2363 * @state: unused
2364 *
2365 * Called when the system (VM) is entering sleep/suspend.
2366 **/
2367static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2368{
2369 struct net_device *netdev = pci_get_drvdata(pdev);
2370 struct i40evf_adapter *adapter = netdev_priv(netdev);
2371 int retval = 0;
2372
2373 netif_device_detach(netdev);
2374
2375 if (netif_running(netdev)) {
2376 rtnl_lock();
2377 i40evf_down(adapter);
2378 rtnl_unlock();
2379 }
2380 i40evf_free_misc_irq(adapter);
2381 i40evf_reset_interrupt_capability(adapter);
2382
2383 retval = pci_save_state(pdev);
2384 if (retval)
2385 return retval;
2386
2387 pci_disable_device(pdev);
2388
2389 return 0;
2390}
2391
2392/**
dbedd44e 2393 * i40evf_resume - Power management resume routine
5eae00c5
GR		 2394 * @pdev: PCI device information struct
2395 *
2396 * Called when the system (VM) is resumed from sleep/suspend.
2397 **/
2398static int i40evf_resume(struct pci_dev *pdev)
2399{
2400 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2401 struct net_device *netdev = adapter->netdev;
2402 u32 err;
2403
2404 pci_set_power_state(pdev, PCI_D0);
2405 pci_restore_state(pdev);
2406 /* pci_restore_state clears dev->state_saved so call
2407 * pci_save_state to restore it.
2408 */
2409 pci_save_state(pdev);
2410
2411 err = pci_enable_device_mem(pdev);
2412 if (err) {
2413 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2414 return err;
2415 }
2416 pci_set_master(pdev);
2417
2418 rtnl_lock();
2419 err = i40evf_set_interrupt_capability(adapter);
2420 if (err) {
2421 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2422 return err;
2423 }
2424 err = i40evf_request_misc_irq(adapter);
2425 rtnl_unlock();
2426 if (err) {
2427 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2428 return err;
2429 }
2430
2431 schedule_work(&adapter->reset_task);
2432
2433 netif_device_attach(netdev);
2434
2435 return err;
2436}
2437
2438#endif /* CONFIG_PM */
2439/**
2440 * i40evf_remove - Device Removal Routine
2441 * @pdev: PCI device information struct
2442 *
2443 * i40evf_remove is called by the PCI subsystem to alert the driver
2444 * that it should release a PCI device. The could be caused by a
2445 * Hot-Plug event, or because the driver is going to be removed from
2446 * memory.
2447 **/
2448static void i40evf_remove(struct pci_dev *pdev)
2449{
2450 struct net_device *netdev = pci_get_drvdata(pdev);
2451 struct i40evf_adapter *adapter = netdev_priv(netdev);
6ba36a24 2452 struct i40evf_mac_filter *f, *ftmp;
5eae00c5
GR		 2453 struct i40e_hw *hw = &adapter->hw;
2454
2455 cancel_delayed_work_sync(&adapter->init_task);
ef8693eb 2456 cancel_work_sync(&adapter->reset_task);
5eae00c5
GR		 2457
2458 if (adapter->netdev_registered) {
2459 unregister_netdev(netdev);
2460 adapter->netdev_registered = false;
2461 }
53d0b3ae 2462
f4a71881 2463 /* Shut down all the garbage mashers on the detention level */
5eae00c5 2464 adapter->state = __I40EVF_REMOVE;
f4a71881 2465 adapter->aq_required = 0;
f4a71881
MW		 2466 i40evf_request_reset(adapter);
2467 msleep(20);
2468 /* If the FW isn't responding, kick it once, but only once. */
2469 if (!i40evf_asq_done(hw)) {
2470 i40evf_request_reset(adapter);
2471 msleep(20);
2472 }
5eae00c5 2473
dbb01c8a 2474 if (adapter->msix_entries) {
5eae00c5 2475 i40evf_misc_irq_disable(adapter);
5eae00c5 2476 i40evf_free_misc_irq(adapter);
5eae00c5 2477 i40evf_reset_interrupt_capability(adapter);
d31944d6 2478 i40evf_free_q_vectors(adapter);
5eae00c5
GR		 2479 }
2480
e5d17c3e
MW		 2481 if (adapter->watchdog_timer.function)
2482 del_timer_sync(&adapter->watchdog_timer);
2483
dbb01c8a
MW		 2484 flush_scheduled_work();
2485
5eae00c5
GR		 2486 if (hw->aq.asq.count)
2487 i40evf_shutdown_adminq(hw);
2488
2489 iounmap(hw->hw_addr);
2490 pci_release_regions(pdev);
2491
e284fc88
MW		 2492 i40evf_free_all_tx_resources(adapter);
2493 i40evf_free_all_rx_resources(adapter);
5eae00c5
GR		 2494 i40evf_free_queues(adapter);
2495 kfree(adapter->vf_res);
6ba36a24
MW		 2496 /* If we got removed before an up/down sequence, we've got a filter
2497 * hanging out there that we need to get rid of.
2498 */
2499 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2500 list_del(&f->list);
2501 kfree(f);
2502 }
37dfdf37
MW		 2503 list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2504 list_del(&f->list);
2505 kfree(f);
2506 }
5eae00c5
GR		 2507
2508 free_netdev(netdev);
2509
2510 pci_disable_pcie_error_reporting(pdev);
2511
2512 pci_disable_device(pdev);
2513}
2514
2515static struct pci_driver i40evf_driver = {
2516 .name = i40evf_driver_name,
2517 .id_table = i40evf_pci_tbl,
2518 .probe = i40evf_probe,
2519 .remove = i40evf_remove,
2520#ifdef CONFIG_PM
2521 .suspend = i40evf_suspend,
2522 .resume = i40evf_resume,
2523#endif
2524 .shutdown = i40evf_shutdown,
2525};
2526
2527/**
2528 * i40e_init_module - Driver Registration Routine
2529 *
2530 * i40e_init_module is the first routine called when the driver is
2531 * loaded. All it does is register with the PCI subsystem.
2532 **/
2533static int __init i40evf_init_module(void)
2534{
2535 int ret;
75a64435 2536
5eae00c5 2537 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
75a64435 2538 i40evf_driver_version);
5eae00c5
GR		 2539
2540 pr_info("%s\n", i40evf_copyright);
2541
2542 ret = pci_register_driver(&i40evf_driver);
2543 return ret;
2544}
2545
2546module_init(i40evf_init_module);
2547
2548/**
2549 * i40e_exit_module - Driver Exit Cleanup Routine
2550 *
2551 * i40e_exit_module is called just before the driver is removed
2552 * from memory.
2553 **/
2554static void __exit i40evf_exit_module(void)
2555{
2556 pci_unregister_driver(&i40evf_driver);
2557}
2558
2559module_exit(i40evf_exit_module);
2560
2561/* i40evf_main.c */
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