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i40e: correct spelling error
[deliverable/linux.git] / drivers / net / ethernet / intel / i40evf / i40evf_main.c
CommitLineData
5eae00c5
GR		 1/*******************************************************************************
2 *
3 * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
5b8eb176 4 * Copyright(c) 2013 - 2015 Intel Corporation.
5eae00c5
GR		 5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
b831607d
JB		 15 * You should have received a copy of the GNU General Public License along
16 * with this program. If not, see <http://www.gnu.org/licenses/>.
17 *
5eae00c5
GR		 18 * The full GNU General Public License is included in this distribution in
19 * the file called "COPYING".
20 *
21 * Contact Information:
22 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24 *
25 ******************************************************************************/
26
27#include "i40evf.h"
28#include "i40e_prototype.h"
29static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter);
30static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter);
31static int i40evf_close(struct net_device *netdev);
32
33char i40evf_driver_name[] = "i40evf";
34static const char i40evf_driver_string[] =
0af56f44 35 "Intel(R) XL710/X710 Virtual Function Network Driver";
5eae00c5 36
76945bf9 37#define DRV_VERSION "1.3.2"
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},
87e6c1d7 52 {PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF), 0},
5eae00c5
GR		 53 /* required last entry */
54 {0, }
55};
56
57MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
58
59MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
60MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
61MODULE_LICENSE("GPL");
62MODULE_VERSION(DRV_VERSION);
63
64/**
65 * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
66 * @hw: pointer to the HW structure
67 * @mem: ptr to mem struct to fill out
68 * @size: size of memory requested
69 * @alignment: what to align the allocation to
70 **/
71i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
72 struct i40e_dma_mem *mem,
73 u64 size, u32 alignment)
74{
75 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
76
77 if (!mem)
78 return I40E_ERR_PARAM;
79
80 mem->size = ALIGN(size, alignment);
81 mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
82 (dma_addr_t *)&mem->pa, GFP_KERNEL);
83 if (mem->va)
84 return 0;
85 else
86 return I40E_ERR_NO_MEMORY;
87}
88
89/**
90 * i40evf_free_dma_mem_d - OS specific memory free for shared code
91 * @hw: pointer to the HW structure
92 * @mem: ptr to mem struct to free
93 **/
94i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
95{
96 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
97
98 if (!mem || !mem->va)
99 return I40E_ERR_PARAM;
100 dma_free_coherent(&adapter->pdev->dev, mem->size,
101 mem->va, (dma_addr_t)mem->pa);
102 return 0;
103}
104
105/**
106 * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
107 * @hw: pointer to the HW structure
108 * @mem: ptr to mem struct to fill out
109 * @size: size of memory requested
110 **/
111i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
112 struct i40e_virt_mem *mem, u32 size)
113{
114 if (!mem)
115 return I40E_ERR_PARAM;
116
117 mem->size = size;
118 mem->va = kzalloc(size, GFP_KERNEL);
119
120 if (mem->va)
121 return 0;
122 else
123 return I40E_ERR_NO_MEMORY;
124}
125
126/**
127 * i40evf_free_virt_mem_d - OS specific memory free for shared code
128 * @hw: pointer to the HW structure
129 * @mem: ptr to mem struct to free
130 **/
131i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
132 struct i40e_virt_mem *mem)
133{
134 if (!mem)
135 return I40E_ERR_PARAM;
136
137 /* it's ok to kfree a NULL pointer */
138 kfree(mem->va);
139
140 return 0;
141}
142
143/**
144 * i40evf_debug_d - OS dependent version of debug printing
145 * @hw: pointer to the HW structure
146 * @mask: debug level mask
147 * @fmt_str: printf-type format description
148 **/
149void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
150{
151 char buf[512];
152 va_list argptr;
153
154 if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
155 return;
156
157 va_start(argptr, fmt_str);
158 vsnprintf(buf, sizeof(buf), fmt_str, argptr);
159 va_end(argptr);
160
161 /* the debug string is already formatted with a newline */
162 pr_info("%s", buf);
163}
164
165/**
166 * i40evf_tx_timeout - Respond to a Tx Hang
167 * @netdev: network interface device structure
168 **/
169static void i40evf_tx_timeout(struct net_device *netdev)
170{
171 struct i40evf_adapter *adapter = netdev_priv(netdev);
172
173 adapter->tx_timeout_count++;
67c818a1
MW		 174 if (!(adapter->flags & (I40EVF_FLAG_RESET_PENDING |
175 I40EVF_FLAG_RESET_NEEDED))) {
3526d800 176 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
625777e3
MW		 177 schedule_work(&adapter->reset_task);
178 }
5eae00c5
GR		 179}
180
181/**
182 * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
183 * @adapter: board private structure
184 **/
185static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
186{
187 struct i40e_hw *hw = &adapter->hw;
75a64435 188
5eae00c5
GR		 189 wr32(hw, I40E_VFINT_DYN_CTL01, 0);
190
191 /* read flush */
192 rd32(hw, I40E_VFGEN_RSTAT);
193
194 synchronize_irq(adapter->msix_entries[0].vector);
195}
196
197/**
198 * i40evf_misc_irq_enable - Enable default interrupt generation settings
199 * @adapter: board private structure
200 **/
201static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
202{
203 struct i40e_hw *hw = &adapter->hw;
75a64435 204
5eae00c5
GR		 205 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
206 I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
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++) {
41a1d04b 244 if (mask & BIT(i - 1)) {
5eae00c5
GR		 245 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
246 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
97bf75f1 247 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
5eae00c5
GR		 248 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
249 }
250 }
251}
252
253/**
254 * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
255 * @adapter: board private structure
256 * @mask: bitmap of vectors to trigger
257 **/
75a64435 258static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
5eae00c5
GR		 259{
260 struct i40e_hw *hw = &adapter->hw;
261 int i;
262 uint32_t dyn_ctl;
263
164ec1bf
MW		 264 if (mask & 1) {
265 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
266 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
97bf75f1 267 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
164ec1bf
MW		 268 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
269 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
270 }
5eae00c5 271 for (i = 1; i < adapter->num_msix_vectors; i++) {
41a1d04b 272 if (mask & BIT(i)) {
5eae00c5
GR		 273 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
274 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
97bf75f1 275 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
5eae00c5
GR		 276 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
277 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
278 }
279 }
280}
281
282/**
283 * i40evf_irq_enable - Enable default interrupt generation settings
284 * @adapter: board private structure
285 **/
286void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
287{
288 struct i40e_hw *hw = &adapter->hw;
289
164ec1bf 290 i40evf_misc_irq_enable(adapter);
5eae00c5
GR		 291 i40evf_irq_enable_queues(adapter, ~0);
292
293 if (flush)
294 rd32(hw, I40E_VFGEN_RSTAT);
295}
296
297/**
298 * i40evf_msix_aq - Interrupt handler for vector 0
299 * @irq: interrupt number
300 * @data: pointer to netdev
301 **/
302static irqreturn_t i40evf_msix_aq(int irq, void *data)
303{
304 struct net_device *netdev = data;
305 struct i40evf_adapter *adapter = netdev_priv(netdev);
306 struct i40e_hw *hw = &adapter->hw;
307 u32 val;
308 u32 ena_mask;
309
310 /* handle non-queue interrupts */
311 val = rd32(hw, I40E_VFINT_ICR01);
312 ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
313
314
315 val = rd32(hw, I40E_VFINT_DYN_CTL01);
316 val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
317 wr32(hw, I40E_VFINT_DYN_CTL01, val);
318
5eae00c5
GR		 319 /* schedule work on the private workqueue */
320 schedule_work(&adapter->adminq_task);
321
322 return IRQ_HANDLED;
323}
324
325/**
326 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
327 * @irq: interrupt number
328 * @data: pointer to a q_vector
329 **/
330static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
331{
332 struct i40e_q_vector *q_vector = data;
333
334 if (!q_vector->tx.ring && !q_vector->rx.ring)
335 return IRQ_HANDLED;
336
337 napi_schedule(&q_vector->napi);
338
339 return IRQ_HANDLED;
340}
341
342/**
343 * i40evf_map_vector_to_rxq - associate irqs with rx queues
344 * @adapter: board private structure
345 * @v_idx: interrupt number
346 * @r_idx: queue number
347 **/
348static void
349i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
350{
351 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
352 struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
353
354 rx_ring->q_vector = q_vector;
355 rx_ring->next = q_vector->rx.ring;
356 rx_ring->vsi = &adapter->vsi;
357 q_vector->rx.ring = rx_ring;
358 q_vector->rx.count++;
359 q_vector->rx.latency_range = I40E_LOW_LATENCY;
360}
361
362/**
363 * i40evf_map_vector_to_txq - associate irqs with tx queues
364 * @adapter: board private structure
365 * @v_idx: interrupt number
366 * @t_idx: queue number
367 **/
368static void
369i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
370{
371 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
372 struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
373
374 tx_ring->q_vector = q_vector;
375 tx_ring->next = q_vector->tx.ring;
376 tx_ring->vsi = &adapter->vsi;
377 q_vector->tx.ring = tx_ring;
378 q_vector->tx.count++;
379 q_vector->tx.latency_range = I40E_LOW_LATENCY;
380 q_vector->num_ringpairs++;
41a1d04b 381 q_vector->ring_mask |= BIT(t_idx);
5eae00c5
GR		 382}
383
384/**
385 * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
386 * @adapter: board private structure to initialize
387 *
388 * This function maps descriptor rings to the queue-specific vectors
389 * we were allotted through the MSI-X enabling code. Ideally, we'd have
390 * one vector per ring/queue, but on a constrained vector budget, we
391 * group the rings as "efficiently" as possible. You would add new
392 * mapping configurations in here.
393 **/
394static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
395{
396 int q_vectors;
397 int v_start = 0;
398 int rxr_idx = 0, txr_idx = 0;
cc052927
MW		 399 int rxr_remaining = adapter->num_active_queues;
400 int txr_remaining = adapter->num_active_queues;
5eae00c5
GR		 401 int i, j;
402 int rqpv, tqpv;
403 int err = 0;
404
405 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
406
407 /* The ideal configuration...
408 * We have enough vectors to map one per queue.
409 */
973371da 410 if (q_vectors >= (rxr_remaining * 2)) {
5eae00c5
GR		 411 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
412 i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
413
414 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
415 i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
416 goto out;
417 }
418
419 /* If we don't have enough vectors for a 1-to-1
420 * mapping, we'll have to group them so there are
421 * multiple queues per vector.
422 * Re-adjusting *qpv takes care of the remainder.
423 */
424 for (i = v_start; i < q_vectors; i++) {
425 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
426 for (j = 0; j < rqpv; j++) {
427 i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
428 rxr_idx++;
429 rxr_remaining--;
430 }
431 }
432 for (i = v_start; i < q_vectors; i++) {
433 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
434 for (j = 0; j < tqpv; j++) {
435 i40evf_map_vector_to_txq(adapter, i, txr_idx);
436 txr_idx++;
437 txr_remaining--;
438 }
439 }
440
441out:
442 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
443
444 return err;
445}
446
447/**
448 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
449 * @adapter: board private structure
450 *
451 * Allocates MSI-X vectors for tx and rx handling, and requests
452 * interrupts from the kernel.
453 **/
454static int
455i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
456{
457 int vector, err, q_vectors;
458 int rx_int_idx = 0, tx_int_idx = 0;
459
460 i40evf_irq_disable(adapter);
461 /* Decrement for Other and TCP Timer vectors */
462 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
463
464 for (vector = 0; vector < q_vectors; vector++) {
465 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
466
467 if (q_vector->tx.ring && q_vector->rx.ring) {
468 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
469 "i40evf-%s-%s-%d", basename,
470 "TxRx", rx_int_idx++);
471 tx_int_idx++;
472 } else if (q_vector->rx.ring) {
473 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
474 "i40evf-%s-%s-%d", basename,
475 "rx", rx_int_idx++);
476 } else if (q_vector->tx.ring) {
477 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
478 "i40evf-%s-%s-%d", basename,
479 "tx", tx_int_idx++);
480 } else {
481 /* skip this unused q_vector */
482 continue;
483 }
484 err = request_irq(
485 adapter->msix_entries[vector + NONQ_VECS].vector,
486 i40evf_msix_clean_rings,
487 0,
488 q_vector->name,
489 q_vector);
490 if (err) {
491 dev_info(&adapter->pdev->dev,
492 "%s: request_irq failed, error: %d\n",
493 __func__, err);
494 goto free_queue_irqs;
495 }
496 /* assign the mask for this irq */
497 irq_set_affinity_hint(
498 adapter->msix_entries[vector + NONQ_VECS].vector,
499 q_vector->affinity_mask);
500 }
501
502 return 0;
503
504free_queue_irqs:
505 while (vector) {
506 vector--;
507 irq_set_affinity_hint(
508 adapter->msix_entries[vector + NONQ_VECS].vector,
509 NULL);
510 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
511 adapter->q_vector[vector]);
512 }
513 return err;
514}
515
516/**
517 * i40evf_request_misc_irq - Initialize MSI-X interrupts
518 * @adapter: board private structure
519 *
520 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
521 * vector is only for the admin queue, and stays active even when the netdev
522 * is closed.
523 **/
524static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
525{
526 struct net_device *netdev = adapter->netdev;
527 int err;
528
b39c1e2c 529 snprintf(adapter->misc_vector_name,
9a21a007
CW		 530 sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
531 dev_name(&adapter->pdev->dev));
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{
13acb546
MW		 669 struct i40evf_vlan_filter *f = NULL;
670 int count = 50;
671
672 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
673 &adapter->crit_section)) {
674 udelay(1);
675 if (--count == 0)
676 goto out;
677 }
5eae00c5
GR		 678
679 f = i40evf_find_vlan(adapter, vlan);
348d4994 680 if (!f) {
5eae00c5 681 f = kzalloc(sizeof(*f), GFP_ATOMIC);
348d4994 682 if (!f)
13acb546 683 goto clearout;
249c8b8d 684
5eae00c5
GR		 685 f->vlan = vlan;
686
687 INIT_LIST_HEAD(&f->list);
688 list_add(&f->list, &adapter->vlan_filter_list);
689 f->add = true;
690 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
691 }
692
13acb546
MW		 693clearout:
694 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
695out:
5eae00c5
GR		 696 return f;
697}
698
699/**
700 * i40evf_del_vlan - Remove a vlan filter from the list
701 * @adapter: board private structure
702 * @vlan: VLAN tag
703 **/
704static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
705{
706 struct i40evf_vlan_filter *f;
13acb546
MW		 707 int count = 50;
708
709 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
710 &adapter->crit_section)) {
711 udelay(1);
712 if (--count == 0)
713 return;
714 }
5eae00c5
GR		 715
716 f = i40evf_find_vlan(adapter, vlan);
717 if (f) {
718 f->remove = true;
719 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
720 }
13acb546 721 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
5eae00c5
GR		 722}
723
724/**
725 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
726 * @netdev: network device struct
727 * @vid: VLAN tag
728 **/
729static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
75a64435 730 __always_unused __be16 proto, u16 vid)
5eae00c5
GR		 731{
732 struct i40evf_adapter *adapter = netdev_priv(netdev);
733
734 if (i40evf_add_vlan(adapter, vid) == NULL)
735 return -ENOMEM;
736 return 0;
737}
738
739/**
740 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
741 * @netdev: network device struct
742 * @vid: VLAN tag
743 **/
744static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
75a64435 745 __always_unused __be16 proto, u16 vid)
5eae00c5
GR		 746{
747 struct i40evf_adapter *adapter = netdev_priv(netdev);
748
749 i40evf_del_vlan(adapter, vid);
750 return 0;
751}
752
753/**
754 * i40evf_find_filter - Search filter list for specific mac filter
755 * @adapter: board private structure
756 * @macaddr: the MAC address
757 *
758 * Returns ptr to the filter object or NULL
759 **/
760static struct
761i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
762 u8 *macaddr)
763{
764 struct i40evf_mac_filter *f;
765
766 if (!macaddr)
767 return NULL;
768
769 list_for_each_entry(f, &adapter->mac_filter_list, list) {
770 if (ether_addr_equal(macaddr, f->macaddr))
771 return f;
772 }
773 return NULL;
774}
775
776/**
777 * i40e_add_filter - Add a mac filter to the filter list
778 * @adapter: board private structure
779 * @macaddr: the MAC address
780 *
781 * Returns ptr to the filter object or NULL when no memory available.
782 **/
783static struct
784i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
785 u8 *macaddr)
786{
787 struct i40evf_mac_filter *f;
54e16f64 788 int count = 50;
5eae00c5
GR		 789
790 if (!macaddr)
791 return NULL;
792
793 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
54e16f64 794 &adapter->crit_section)) {
b65476cd 795 udelay(1);
54e16f64
MW		 796 if (--count == 0)
797 return NULL;
798 }
5eae00c5
GR		 799
800 f = i40evf_find_filter(adapter, macaddr);
348d4994 801 if (!f) {
5eae00c5 802 f = kzalloc(sizeof(*f), GFP_ATOMIC);
348d4994 803 if (!f) {
5eae00c5
GR		 804 clear_bit(__I40EVF_IN_CRITICAL_TASK,
805 &adapter->crit_section);
806 return NULL;
807 }
808
9a173901 809 ether_addr_copy(f->macaddr, macaddr);
5eae00c5
GR		 810
811 list_add(&f->list, &adapter->mac_filter_list);
812 f->add = true;
813 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
814 }
815
816 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
817 return f;
818}
819
820/**
821 * i40evf_set_mac - NDO callback to set port mac address
822 * @netdev: network interface device structure
823 * @p: pointer to an address structure
824 *
825 * Returns 0 on success, negative on failure
826 **/
827static int i40evf_set_mac(struct net_device *netdev, void *p)
828{
829 struct i40evf_adapter *adapter = netdev_priv(netdev);
830 struct i40e_hw *hw = &adapter->hw;
831 struct i40evf_mac_filter *f;
832 struct sockaddr *addr = p;
833
834 if (!is_valid_ether_addr(addr->sa_data))
835 return -EADDRNOTAVAIL;
836
837 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
838 return 0;
839
840 f = i40evf_add_filter(adapter, addr->sa_data);
841 if (f) {
9a173901
GR		 842 ether_addr_copy(hw->mac.addr, addr->sa_data);
843 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
5eae00c5
GR		 844 }
845
846 return (f == NULL) ? -ENOMEM : 0;
847}
848
849/**
850 * i40evf_set_rx_mode - NDO callback to set the netdev filters
851 * @netdev: network interface device structure
852 **/
853static void i40evf_set_rx_mode(struct net_device *netdev)
854{
855 struct i40evf_adapter *adapter = netdev_priv(netdev);
856 struct i40evf_mac_filter *f, *ftmp;
857 struct netdev_hw_addr *uca;
858 struct netdev_hw_addr *mca;
54e16f64 859 int count = 50;
5eae00c5
GR		 860
861 /* add addr if not already in the filter list */
862 netdev_for_each_uc_addr(uca, netdev) {
863 i40evf_add_filter(adapter, uca->addr);
864 }
865 netdev_for_each_mc_addr(mca, netdev) {
866 i40evf_add_filter(adapter, mca->addr);
867 }
868
869 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
54e16f64 870 &adapter->crit_section)) {
b65476cd 871 udelay(1);
54e16f64
MW		 872 if (--count == 0) {
873 dev_err(&adapter->pdev->dev,
874 "Failed to get lock in %s\n", __func__);
875 return;
876 }
877 }
5eae00c5
GR		 878 /* remove filter if not in netdev list */
879 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
880 bool found = false;
881
dc5f2de6 882 if (is_multicast_ether_addr(f->macaddr)) {
5eae00c5
GR		 883 netdev_for_each_mc_addr(mca, netdev) {
884 if (ether_addr_equal(mca->addr, f->macaddr)) {
885 found = true;
886 break;
887 }
888 }
889 } else {
890 netdev_for_each_uc_addr(uca, netdev) {
891 if (ether_addr_equal(uca->addr, f->macaddr)) {
892 found = true;
893 break;
894 }
895 }
68ef1692
MW		 896 if (ether_addr_equal(f->macaddr, adapter->hw.mac.addr))
897 found = true;
5eae00c5 898 }
68ef1692 899 if (!found) {
5eae00c5
GR		 900 f->remove = true;
901 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
902 }
903 }
904 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
905}
906
907/**
908 * i40evf_napi_enable_all - enable NAPI on all queue vectors
909 * @adapter: board private structure
910 **/
911static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
912{
913 int q_idx;
914 struct i40e_q_vector *q_vector;
915 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
916
917 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
918 struct napi_struct *napi;
75a64435 919
5eae00c5
GR		 920 q_vector = adapter->q_vector[q_idx];
921 napi = &q_vector->napi;
922 napi_enable(napi);
923 }
924}
925
926/**
927 * i40evf_napi_disable_all - disable NAPI on all queue vectors
928 * @adapter: board private structure
929 **/
930static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
931{
932 int q_idx;
933 struct i40e_q_vector *q_vector;
934 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
935
936 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
937 q_vector = adapter->q_vector[q_idx];
938 napi_disable(&q_vector->napi);
939 }
940}
941
942/**
943 * i40evf_configure - set up transmit and receive data structures
944 * @adapter: board private structure
945 **/
946static void i40evf_configure(struct i40evf_adapter *adapter)
947{
948 struct net_device *netdev = adapter->netdev;
949 int i;
950
951 i40evf_set_rx_mode(netdev);
952
953 i40evf_configure_tx(adapter);
954 i40evf_configure_rx(adapter);
955 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
956
cc052927 957 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5 958 struct i40e_ring *ring = adapter->rx_rings[i];
75a64435 959
a132af24 960 i40evf_alloc_rx_buffers_1buf(ring, ring->count);
5eae00c5
GR		 961 ring->next_to_use = ring->count - 1;
962 writel(ring->next_to_use, ring->tail);
963 }
964}
965
966/**
967 * i40evf_up_complete - Finish the last steps of bringing up a connection
968 * @adapter: board private structure
969 **/
970static int i40evf_up_complete(struct i40evf_adapter *adapter)
971{
972 adapter->state = __I40EVF_RUNNING;
973 clear_bit(__I40E_DOWN, &adapter->vsi.state);
974
975 i40evf_napi_enable_all(adapter);
976
977 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
978 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
979 return 0;
980}
981
5eae00c5
GR		 982/**
983 * i40e_down - Shutdown the connection processing
984 * @adapter: board private structure
985 **/
986void i40evf_down(struct i40evf_adapter *adapter)
987{
988 struct net_device *netdev = adapter->netdev;
989 struct i40evf_mac_filter *f;
990
ddf0b3a6
MW		 991 if (adapter->state == __I40EVF_DOWN)
992 return;
993
53d0b3ae
MW		 994 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
995 &adapter->crit_section))
996 usleep_range(500, 1000);
997
63e18c25
MW		 998 netif_carrier_off(netdev);
999 netif_tx_disable(netdev);
748c434b 1000 i40evf_napi_disable_all(adapter);
63e18c25 1001 i40evf_irq_disable(adapter);
53d0b3ae 1002
ef8693eb 1003 /* remove all MAC filters */
5eae00c5
GR		 1004 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1005 f->remove = true;
1006 }
ed1f5b58
MW		 1007 /* remove all VLAN filters */
1008 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1009 f->remove = true;
1010 }
ef8693eb
MW		 1011 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1012 adapter->state != __I40EVF_RESETTING) {
53d0b3ae
MW		 1013 /* cancel any current operation */
1014 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
53d0b3ae
MW		 1015 /* Schedule operations to close down the HW. Don't wait
1016 * here for this to complete. The watchdog is still running
1017 * and it will take care of this.
1018 */
1019 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
ed1f5b58 1020 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
ef8693eb 1021 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
ef8693eb 1022 }
5eae00c5 1023
53d0b3ae 1024 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
5eae00c5
GR		 1025}
1026
1027/**
1028 * i40evf_acquire_msix_vectors - Setup the MSIX capability
1029 * @adapter: board private structure
1030 * @vectors: number of vectors to request
1031 *
1032 * Work with the OS to set up the MSIX vectors needed.
1033 *
1034 * Returns 0 on success, negative on failure
1035 **/
1036static int
1037i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1038{
1039 int err, vector_threshold;
1040
1041 /* We'll want at least 3 (vector_threshold):
1042 * 0) Other (Admin Queue and link, mostly)
1043 * 1) TxQ[0] Cleanup
1044 * 2) RxQ[0] Cleanup
1045 */
1046 vector_threshold = MIN_MSIX_COUNT;
1047
1048 /* The more we get, the more we will assign to Tx/Rx Cleanup
1049 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1050 * Right now, we simply care about how many we'll get; we'll
1051 * set them up later while requesting irq's.
1052 */
fc2f2f5d
AG		 1053 err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1054 vector_threshold, vectors);
1055 if (err < 0) {
80e72893 1056 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
5eae00c5
GR		 1057 kfree(adapter->msix_entries);
1058 adapter->msix_entries = NULL;
fc2f2f5d 1059 return err;
5eae00c5 1060 }
fc2f2f5d
AG		 1061
1062 /* Adjust for only the vectors we'll use, which is minimum
1063 * of max_msix_q_vectors + NONQ_VECS, or the number of
1064 * vectors we were allocated.
1065 */
1066 adapter->num_msix_vectors = err;
1067 return 0;
5eae00c5
GR		 1068}
1069
1070/**
1071 * i40evf_free_queues - Free memory for all rings
1072 * @adapter: board private structure to initialize
1073 *
1074 * Free all of the memory associated with queue pairs.
1075 **/
1076static void i40evf_free_queues(struct i40evf_adapter *adapter)
1077{
1078 int i;
1079
1080 if (!adapter->vsi_res)
1081 return;
cc052927 1082 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5
GR		 1083 if (adapter->tx_rings[i])
1084 kfree_rcu(adapter->tx_rings[i], rcu);
1085 adapter->tx_rings[i] = NULL;
1086 adapter->rx_rings[i] = NULL;
1087 }
1088}
1089
1090/**
1091 * i40evf_alloc_queues - Allocate memory for all rings
1092 * @adapter: board private structure to initialize
1093 *
1094 * We allocate one ring per queue at run-time since we don't know the
1095 * number of queues at compile-time. The polling_netdev array is
1096 * intended for Multiqueue, but should work fine with a single queue.
1097 **/
1098static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1099{
1100 int i;
1101
cc052927 1102 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5
GR		 1103 struct i40e_ring *tx_ring;
1104 struct i40e_ring *rx_ring;
1105
75a64435 1106 tx_ring = kzalloc(sizeof(*tx_ring) * 2, GFP_KERNEL);
5eae00c5
GR		 1107 if (!tx_ring)
1108 goto err_out;
1109
1110 tx_ring->queue_index = i;
1111 tx_ring->netdev = adapter->netdev;
1112 tx_ring->dev = &adapter->pdev->dev;
d732a184 1113 tx_ring->count = adapter->tx_desc_count;
5eae00c5
GR		 1114 adapter->tx_rings[i] = tx_ring;
1115
1116 rx_ring = &tx_ring[1];
1117 rx_ring->queue_index = i;
1118 rx_ring->netdev = adapter->netdev;
1119 rx_ring->dev = &adapter->pdev->dev;
d732a184 1120 rx_ring->count = adapter->rx_desc_count;
5eae00c5
GR		 1121 adapter->rx_rings[i] = rx_ring;
1122 }
1123
1124 return 0;
1125
1126err_out:
1127 i40evf_free_queues(adapter);
1128 return -ENOMEM;
1129}
1130
1131/**
1132 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1133 * @adapter: board private structure to initialize
1134 *
1135 * Attempt to configure the interrupts using the best available
1136 * capabilities of the hardware and the kernel.
1137 **/
1138static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1139{
1140 int vector, v_budget;
1141 int pairs = 0;
1142 int err = 0;
1143
1144 if (!adapter->vsi_res) {
1145 err = -EIO;
1146 goto out;
1147 }
cc052927 1148 pairs = adapter->num_active_queues;
5eae00c5
GR		 1149
1150 /* It's easy to be greedy for MSI-X vectors, but it really
1151 * doesn't do us much good if we have a lot more vectors
1152 * than CPU's. So let's be conservative and only ask for
1153 * (roughly) twice the number of vectors as there are CPU's.
1154 */
30a500e2
MW		 1155 v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1156 v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
5eae00c5 1157
5eae00c5
GR		 1158 adapter->msix_entries = kcalloc(v_budget,
1159 sizeof(struct msix_entry), GFP_KERNEL);
1160 if (!adapter->msix_entries) {
1161 err = -ENOMEM;
1162 goto out;
1163 }
1164
1165 for (vector = 0; vector < v_budget; vector++)
1166 adapter->msix_entries[vector].entry = vector;
1167
1168 i40evf_acquire_msix_vectors(adapter, v_budget);
1169
1170out:
1171 adapter->netdev->real_num_tx_queues = pairs;
1172 return err;
1173}
1174
e25d00b8
ASJ		 1175/**
1176 * i40e_configure_rss_aq - Prepare for RSS using AQ commands
1177 * @vsi: vsi structure
1178 * @seed: RSS hash seed
1179 **/
1180static void i40evf_configure_rss_aq(struct i40e_vsi *vsi, const u8 *seed)
1181{
1182 struct i40e_aqc_get_set_rss_key_data rss_key;
1183 struct i40evf_adapter *adapter = vsi->back;
1184 struct i40e_hw *hw = &adapter->hw;
1185 int ret = 0, i;
1186 u8 *rss_lut;
1187
1188 if (!vsi->id)
1189 return;
1190
1191 if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
1192 /* bail because we already have a command pending */
1193 dev_err(&adapter->pdev->dev, "Cannot confiure RSS, command %d pending\n",
1194 adapter->current_op);
1195 return;
1196 }
1197
1198 memset(&rss_key, 0, sizeof(rss_key));
1199 memcpy(&rss_key, seed, sizeof(rss_key));
1200
1201 rss_lut = kzalloc(((I40E_VFQF_HLUT_MAX_INDEX + 1) * 4), GFP_KERNEL);
1202 if (!rss_lut)
1203 return;
1204
1205 /* Populate the LUT with max no. PF queues in round robin fashion */
1206 for (i = 0; i <= (I40E_VFQF_HLUT_MAX_INDEX * 4); i++)
1207 rss_lut[i] = i % adapter->num_active_queues;
1208
1209 ret = i40evf_aq_set_rss_key(hw, vsi->id, &rss_key);
1210 if (ret) {
1211 dev_err(&adapter->pdev->dev,
1212 "Cannot set RSS key, err %s aq_err %s\n",
1213 i40evf_stat_str(hw, ret),
1214 i40evf_aq_str(hw, hw->aq.asq_last_status));
1215 return;
1216 }
1217
1218 ret = i40evf_aq_set_rss_lut(hw, vsi->id, false, rss_lut,
1219 (I40E_VFQF_HLUT_MAX_INDEX + 1) * 4);
1220 if (ret)
1221 dev_err(&adapter->pdev->dev,
1222 "Cannot set RSS lut, err %s aq_err %s\n",
1223 i40evf_stat_str(hw, ret),
1224 i40evf_aq_str(hw, hw->aq.asq_last_status));
1225}
1226
1227/**
1228 * i40e_configure_rss_reg - Prepare for RSS if used
1229 * @adapter: board private structure
1230 * @seed: RSS hash seed
1231 **/
1232static void i40evf_configure_rss_reg(struct i40evf_adapter *adapter,
1233 const u8 *seed)
1234{
1235 struct i40e_hw *hw = &adapter->hw;
1236 u32 *seed_dw = (u32 *)seed;
1237 u32 cqueue = 0;
1238 u32 lut = 0;
1239 int i, j;
1240
1241 /* Fill out hash function seed */
1242 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1243 wr32(hw, I40E_VFQF_HKEY(i), seed_dw[i]);
1244
1245 /* Populate the LUT with max no. PF queues in round robin fashion */
1246 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
1247 lut = 0;
1248 for (j = 0; j < 4; j++) {
1249 if (cqueue == adapter->num_active_queues)
1250 cqueue = 0;
1251 lut |= ((cqueue) << (8 * j));
1252 cqueue++;
1253 }
1254 wr32(hw, I40E_VFQF_HLUT(i), lut);
1255 }
1256 i40e_flush(hw);
1257}
1258
1259/**
1260 * i40evf_configure_rss - Prepare for RSS
1261 * @adapter: board private structure
1262 **/
1263static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1264{
1265 struct i40e_hw *hw = &adapter->hw;
1266 u8 seed[I40EVF_HKEY_ARRAY_SIZE];
1267 u64 hena;
1268
1269 netdev_rss_key_fill((void *)seed, I40EVF_HKEY_ARRAY_SIZE);
1270
1271 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1272 hena = I40E_DEFAULT_RSS_HENA;
1273 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1274 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1275
1276 if (RSS_AQ(adapter))
1277 i40evf_configure_rss_aq(&adapter->vsi, seed);
1278 else
1279 i40evf_configure_rss_reg(adapter, seed);
1280}
1281
5eae00c5
GR		 1282/**
1283 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1284 * @adapter: board private structure to initialize
1285 *
1286 * We allocate one q_vector per queue interrupt. If allocation fails we
1287 * return -ENOMEM.
1288 **/
1289static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1290{
1291 int q_idx, num_q_vectors;
1292 struct i40e_q_vector *q_vector;
1293
1294 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1295
1296 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
75a64435 1297 q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL);
5eae00c5
GR		 1298 if (!q_vector)
1299 goto err_out;
1300 q_vector->adapter = adapter;
1301 q_vector->vsi = &adapter->vsi;
1302 q_vector->v_idx = q_idx;
1303 netif_napi_add(adapter->netdev, &q_vector->napi,
75a64435 1304 i40evf_napi_poll, NAPI_POLL_WEIGHT);
5eae00c5
GR		 1305 adapter->q_vector[q_idx] = q_vector;
1306 }
1307
1308 return 0;
1309
1310err_out:
1311 while (q_idx) {
1312 q_idx--;
1313 q_vector = adapter->q_vector[q_idx];
1314 netif_napi_del(&q_vector->napi);
1315 kfree(q_vector);
1316 adapter->q_vector[q_idx] = NULL;
1317 }
1318 return -ENOMEM;
1319}
1320
1321/**
1322 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1323 * @adapter: board private structure to initialize
1324 *
1325 * This function frees the memory allocated to the q_vectors. In addition if
1326 * NAPI is enabled it will delete any references to the NAPI struct prior
1327 * to freeing the q_vector.
1328 **/
1329static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1330{
1331 int q_idx, num_q_vectors;
1332 int napi_vectors;
1333
1334 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
cc052927 1335 napi_vectors = adapter->num_active_queues;
5eae00c5
GR		 1336
1337 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1338 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1339
1340 adapter->q_vector[q_idx] = NULL;
1341 if (q_idx < napi_vectors)
1342 netif_napi_del(&q_vector->napi);
1343 kfree(q_vector);
1344 }
1345}
1346
1347/**
1348 * i40evf_reset_interrupt_capability - Reset MSIX setup
1349 * @adapter: board private structure
1350 *
1351 **/
1352void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1353{
1354 pci_disable_msix(adapter->pdev);
1355 kfree(adapter->msix_entries);
1356 adapter->msix_entries = NULL;
5eae00c5
GR		 1357}
1358
1359/**
1360 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1361 * @adapter: board private structure to initialize
1362 *
1363 **/
1364int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1365{
1366 int err;
1367
1368 err = i40evf_set_interrupt_capability(adapter);
1369 if (err) {
1370 dev_err(&adapter->pdev->dev,
1371 "Unable to setup interrupt capabilities\n");
1372 goto err_set_interrupt;
1373 }
1374
1375 err = i40evf_alloc_q_vectors(adapter);
1376 if (err) {
1377 dev_err(&adapter->pdev->dev,
1378 "Unable to allocate memory for queue vectors\n");
1379 goto err_alloc_q_vectors;
1380 }
1381
1382 err = i40evf_alloc_queues(adapter);
1383 if (err) {
1384 dev_err(&adapter->pdev->dev,
1385 "Unable to allocate memory for queues\n");
1386 goto err_alloc_queues;
1387 }
1388
1389 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
75a64435
MW		 1390 (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1391 adapter->num_active_queues);
5eae00c5
GR		 1392
1393 return 0;
1394err_alloc_queues:
1395 i40evf_free_q_vectors(adapter);
1396err_alloc_q_vectors:
1397 i40evf_reset_interrupt_capability(adapter);
1398err_set_interrupt:
1399 return err;
1400}
1401
1402/**
1403 * i40evf_watchdog_timer - Periodic call-back timer
1404 * @data: pointer to adapter disguised as unsigned long
1405 **/
1406static void i40evf_watchdog_timer(unsigned long data)
1407{
1408 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
75a64435 1409
5eae00c5
GR		 1410 schedule_work(&adapter->watchdog_task);
1411 /* timer will be rescheduled in watchdog task */
1412}
1413
1414/**
1415 * i40evf_watchdog_task - Periodic call-back task
1416 * @work: pointer to work_struct
1417 **/
1418static void i40evf_watchdog_task(struct work_struct *work)
1419{
1420 struct i40evf_adapter *adapter = container_of(work,
75a64435
MW		 1421 struct i40evf_adapter,
1422 watchdog_task);
5eae00c5 1423 struct i40e_hw *hw = &adapter->hw;
fd35886a 1424 uint32_t rstat_val;
5eae00c5 1425
ef8693eb
MW		 1426 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1427 goto restart_watchdog;
1428
1429 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
fd35886a
AS		 1430 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1431 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1432 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1433 (rstat_val == I40E_VFR_COMPLETED)) {
ef8693eb
MW		 1434 /* A chance for redemption! */
1435 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1436 adapter->state = __I40EVF_STARTUP;
1437 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1438 schedule_delayed_work(&adapter->init_task, 10);
1439 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1440 &adapter->crit_section);
1441 /* Don't reschedule the watchdog, since we've restarted
1442 * the init task. When init_task contacts the PF and
1443 * gets everything set up again, it'll restart the
1444 * watchdog for us. Down, boy. Sit. Stay. Woof.
1445 */
1446 return;
1447 }
ef8693eb
MW		 1448 adapter->aq_required = 0;
1449 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5 1450 goto watchdog_done;
ef8693eb 1451 }
5eae00c5 1452
ef8693eb
MW		 1453 if ((adapter->state < __I40EVF_DOWN) ||
1454 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
5eae00c5
GR		 1455 goto watchdog_done;
1456
ef8693eb 1457 /* check for reset */
fd35886a 1458 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
75a64435 1459 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
ef8693eb 1460 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
fd35886a
AS		 1461 (rstat_val != I40E_VFR_VFACTIVE) &&
1462 (rstat_val != I40E_VFR_COMPLETED)) {
5eae00c5 1463 adapter->state = __I40EVF_RESETTING;
ef8693eb 1464 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
249c8b8d 1465 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
5eae00c5 1466 schedule_work(&adapter->reset_task);
ef8693eb
MW		 1467 adapter->aq_required = 0;
1468 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 1469 goto watchdog_done;
1470 }
1471
1472 /* Process admin queue tasks. After init, everything gets done
1473 * here so we don't race on the admin queue.
1474 */
ed636960 1475 if (adapter->current_op) {
0758e7cb
MW		 1476 if (!i40evf_asq_done(hw)) {
1477 dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1478 i40evf_send_api_ver(adapter);
1479 }
5eae00c5 1480 goto watchdog_done;
0758e7cb 1481 }
e6d038de
MW		 1482 if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
1483 i40evf_send_vf_config_msg(adapter);
1484 goto watchdog_done;
1485 }
5eae00c5 1486
e284fc88
MW		 1487 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1488 i40evf_disable_queues(adapter);
1489 goto watchdog_done;
1490 }
1491
5eae00c5
GR		 1492 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1493 i40evf_map_queues(adapter);
1494 goto watchdog_done;
1495 }
1496
1497 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1498 i40evf_add_ether_addrs(adapter);
1499 goto watchdog_done;
1500 }
1501
1502 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1503 i40evf_add_vlans(adapter);
1504 goto watchdog_done;
1505 }
1506
1507 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1508 i40evf_del_ether_addrs(adapter);
1509 goto watchdog_done;
1510 }
1511
1512 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1513 i40evf_del_vlans(adapter);
1514 goto watchdog_done;
1515 }
1516
5eae00c5
GR		 1517 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1518 i40evf_configure_queues(adapter);
1519 goto watchdog_done;
1520 }
1521
1522 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1523 i40evf_enable_queues(adapter);
1524 goto watchdog_done;
1525 }
1526
e25d00b8
ASJ		 1527 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
1528 /* This message goes straight to the firmware, not the
1529 * PF, so we don't have to set current_op as we will
1530 * not get a response through the ARQ.
1531 */
1532 i40evf_configure_rss(adapter);
1533 adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
1534 goto watchdog_done;
1535 }
1536
5eae00c5
GR		 1537 if (adapter->state == __I40EVF_RUNNING)
1538 i40evf_request_stats(adapter);
5eae00c5 1539watchdog_done:
4870e176
MW		 1540 if (adapter->state == __I40EVF_RUNNING) {
1541 i40evf_irq_enable_queues(adapter, ~0);
1542 i40evf_fire_sw_int(adapter, 0xFF);
1543 } else {
1544 i40evf_fire_sw_int(adapter, 0x1);
1545 }
1546
ef8693eb
MW		 1547 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1548restart_watchdog:
d3e2edb7
AS		 1549 if (adapter->state == __I40EVF_REMOVE)
1550 return;
5eae00c5
GR		 1551 if (adapter->aq_required)
1552 mod_timer(&adapter->watchdog_timer,
1553 jiffies + msecs_to_jiffies(20));
1554 else
1555 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
5eae00c5
GR		 1556 schedule_work(&adapter->adminq_task);
1557}
1558
67c818a1
MW		 1559#define I40EVF_RESET_WAIT_MS 10
1560#define I40EVF_RESET_WAIT_COUNT 500
5eae00c5
GR		 1561/**
1562 * i40evf_reset_task - Call-back task to handle hardware reset
1563 * @work: pointer to work_struct
1564 *
1565 * During reset we need to shut down and reinitialize the admin queue
1566 * before we can use it to communicate with the PF again. We also clear
1567 * and reinit the rings because that context is lost as well.
1568 **/
1569static void i40evf_reset_task(struct work_struct *work)
1570{
ef8693eb
MW		 1571 struct i40evf_adapter *adapter = container_of(work,
1572 struct i40evf_adapter,
1573 reset_task);
ac833bbf 1574 struct net_device *netdev = adapter->netdev;
5eae00c5 1575 struct i40e_hw *hw = &adapter->hw;
ac833bbf 1576 struct i40evf_mac_filter *f;
5eae00c5 1577 uint32_t rstat_val;
ac833bbf 1578 int i = 0, err;
5eae00c5
GR		 1579
1580 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1581 &adapter->crit_section))
f98a2006 1582 usleep_range(500, 1000);
3526d800 1583
67c818a1 1584 i40evf_misc_irq_disable(adapter);
3526d800 1585 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
67c818a1
MW		 1586 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1587 /* Restart the AQ here. If we have been reset but didn't
1588 * detect it, or if the PF had to reinit, our AQ will be hosed.
1589 */
1590 i40evf_shutdown_adminq(hw);
1591 i40evf_init_adminq(hw);
3526d800
MW		 1592 i40evf_request_reset(adapter);
1593 }
67c818a1 1594 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
3526d800 1595
ef8693eb
MW		 1596 /* poll until we see the reset actually happen */
1597 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1598 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1599 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
fd35886a
AS		 1600 if ((rstat_val != I40E_VFR_VFACTIVE) &&
1601 (rstat_val != I40E_VFR_COMPLETED))
ef8693eb 1602 break;
67c818a1 1603 usleep_range(500, 1000);
ef8693eb
MW		 1604 }
1605 if (i == I40EVF_RESET_WAIT_COUNT) {
67c818a1 1606 dev_info(&adapter->pdev->dev, "Never saw reset\n");
ef8693eb
MW		 1607 goto continue_reset; /* act like the reset happened */
1608 }
5eae00c5 1609
ef8693eb
MW		 1610 /* wait until the reset is complete and the PF is responding to us */
1611 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
5eae00c5
GR		 1612 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1613 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
67c818a1 1614 if (rstat_val == I40E_VFR_VFACTIVE)
5eae00c5 1615 break;
c88e38cc 1616 msleep(I40EVF_RESET_WAIT_MS);
5eae00c5 1617 }
67c818a1
MW		 1618 /* extra wait to make sure minimum wait is met */
1619 msleep(I40EVF_RESET_WAIT_MS);
ef8693eb 1620 if (i == I40EVF_RESET_WAIT_COUNT) {
6ba36a24
MW		 1621 struct i40evf_mac_filter *f, *ftmp;
1622 struct i40evf_vlan_filter *fv, *fvtmp;
1623
5eae00c5 1624 /* reset never finished */
80e72893 1625 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
ef8693eb
MW		 1626 rstat_val);
1627 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1628
169f4076
MW		 1629 if (netif_running(adapter->netdev)) {
1630 set_bit(__I40E_DOWN, &adapter->vsi.state);
ac833bbf 1631 netif_carrier_off(netdev);
67c818a1
MW		 1632 netif_tx_disable(netdev);
1633 i40evf_napi_disable_all(adapter);
1634 i40evf_irq_disable(adapter);
169f4076
MW		 1635 i40evf_free_traffic_irqs(adapter);
1636 i40evf_free_all_tx_resources(adapter);
1637 i40evf_free_all_rx_resources(adapter);
1638 }
6ba36a24
MW		 1639
1640 /* Delete all of the filters, both MAC and VLAN. */
1641 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1642 list) {
1643 list_del(&f->list);
1644 kfree(f);
1645 }
67c818a1 1646
6ba36a24
MW		 1647 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1648 list) {
1649 list_del(&fv->list);
1650 kfree(fv);
1651 }
1652
ef8693eb
MW		 1653 i40evf_free_misc_irq(adapter);
1654 i40evf_reset_interrupt_capability(adapter);
1655 i40evf_free_queues(adapter);
d31944d6 1656 i40evf_free_q_vectors(adapter);
ef8693eb
MW		 1657 kfree(adapter->vf_res);
1658 i40evf_shutdown_adminq(hw);
1659 adapter->netdev->flags &= ~IFF_UP;
1660 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
67c818a1
MW		 1661 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1662 dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
ef8693eb 1663 return; /* Do not attempt to reinit. It's dead, Jim. */
5eae00c5 1664 }
ef8693eb
MW		 1665
1666continue_reset:
3c8e0b98 1667 if (netif_running(adapter->netdev)) {
3c8e0b98 1668 netif_carrier_off(netdev);
67c818a1
MW		 1669 netif_tx_stop_all_queues(netdev);
1670 i40evf_napi_disable_all(adapter);
3c8e0b98 1671 }
67c818a1 1672 i40evf_irq_disable(adapter);
ac833bbf 1673
5eae00c5 1674 adapter->state = __I40EVF_RESETTING;
67c818a1
MW		 1675 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1676
1677 /* free the Tx/Rx rings and descriptors, might be better to just
1678 * re-use them sometime in the future
1679 */
1680 i40evf_free_all_rx_resources(adapter);
1681 i40evf_free_all_tx_resources(adapter);
5eae00c5
GR		 1682
1683 /* kill and reinit the admin queue */
1684 if (i40evf_shutdown_adminq(hw))
ac833bbf
MW		 1685 dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
1686 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 1687 err = i40evf_init_adminq(hw);
1688 if (err)
ac833bbf
MW		 1689 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1690 err);
5eae00c5 1691
e6d038de
MW		 1692 adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG;
1693 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
ac833bbf
MW		 1694
1695 /* re-add all MAC filters */
1696 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1697 f->add = true;
1698 }
1699 /* re-add all VLAN filters */
1700 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1701 f->add = true;
1702 }
e6d038de 1703 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
ac833bbf 1704 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
5eae00c5 1705 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
67c818a1 1706 i40evf_misc_irq_enable(adapter);
5eae00c5
GR		 1707
1708 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1709
1710 if (netif_running(adapter->netdev)) {
1711 /* allocate transmit descriptors */
1712 err = i40evf_setup_all_tx_resources(adapter);
1713 if (err)
1714 goto reset_err;
1715
1716 /* allocate receive descriptors */
1717 err = i40evf_setup_all_rx_resources(adapter);
1718 if (err)
1719 goto reset_err;
1720
1721 i40evf_configure(adapter);
1722
1723 err = i40evf_up_complete(adapter);
1724 if (err)
1725 goto reset_err;
1726
1727 i40evf_irq_enable(adapter, true);
67c818a1
MW		 1728 } else {
1729 adapter->state = __I40EVF_DOWN;
5eae00c5 1730 }
67c818a1 1731
5eae00c5
GR		 1732 return;
1733reset_err:
80e72893 1734 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
5eae00c5
GR		 1735 i40evf_close(adapter->netdev);
1736}
1737
1738/**
1739 * i40evf_adminq_task - worker thread to clean the admin queue
1740 * @work: pointer to work_struct containing our data
1741 **/
1742static void i40evf_adminq_task(struct work_struct *work)
1743{
1744 struct i40evf_adapter *adapter =
1745 container_of(work, struct i40evf_adapter, adminq_task);
1746 struct i40e_hw *hw = &adapter->hw;
1747 struct i40e_arq_event_info event;
1748 struct i40e_virtchnl_msg *v_msg;
1749 i40e_status ret;
912257e5 1750 u32 val, oldval;
5eae00c5
GR		 1751 u16 pending;
1752
ef8693eb 1753 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
7235448c 1754 goto out;
ef8693eb 1755
1001dc37
MW		 1756 event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1757 event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
249c8b8d 1758 if (!event.msg_buf)
7235448c 1759 goto out;
249c8b8d 1760
5eae00c5
GR		 1761 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1762 do {
1763 ret = i40evf_clean_arq_element(hw, &event, &pending);
8b011ebb 1764 if (ret || !v_msg->v_opcode)
5eae00c5
GR		 1765 break; /* No event to process or error cleaning ARQ */
1766
1767 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1768 v_msg->v_retval, event.msg_buf,
1001dc37 1769 event.msg_len);
75a64435 1770 if (pending != 0)
5eae00c5 1771 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
5eae00c5
GR		 1772 } while (pending);
1773
67c818a1
MW		 1774 if ((adapter->flags &
1775 (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
1776 adapter->state == __I40EVF_RESETTING)
1777 goto freedom;
1778
912257e5
MW		 1779 /* check for error indications */
1780 val = rd32(hw, hw->aq.arq.len);
1781 oldval = val;
1782 if (val & I40E_VF_ARQLEN_ARQVFE_MASK) {
1783 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1784 val &= ~I40E_VF_ARQLEN_ARQVFE_MASK;
1785 }
1786 if (val & I40E_VF_ARQLEN_ARQOVFL_MASK) {
1787 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1788 val &= ~I40E_VF_ARQLEN_ARQOVFL_MASK;
1789 }
1790 if (val & I40E_VF_ARQLEN_ARQCRIT_MASK) {
1791 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1792 val &= ~I40E_VF_ARQLEN_ARQCRIT_MASK;
1793 }
1794 if (oldval != val)
1795 wr32(hw, hw->aq.arq.len, val);
1796
1797 val = rd32(hw, hw->aq.asq.len);
1798 oldval = val;
1799 if (val & I40E_VF_ATQLEN_ATQVFE_MASK) {
1800 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1801 val &= ~I40E_VF_ATQLEN_ATQVFE_MASK;
1802 }
1803 if (val & I40E_VF_ATQLEN_ATQOVFL_MASK) {
1804 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1805 val &= ~I40E_VF_ATQLEN_ATQOVFL_MASK;
1806 }
1807 if (val & I40E_VF_ATQLEN_ATQCRIT_MASK) {
1808 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1809 val &= ~I40E_VF_ATQLEN_ATQCRIT_MASK;
1810 }
1811 if (oldval != val)
1812 wr32(hw, hw->aq.asq.len, val);
1813
67c818a1 1814freedom:
7235448c
MW		 1815 kfree(event.msg_buf);
1816out:
5eae00c5
GR		 1817 /* re-enable Admin queue interrupt cause */
1818 i40evf_misc_irq_enable(adapter);
5eae00c5
GR		 1819}
1820
1821/**
1822 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1823 * @adapter: board private structure
1824 *
1825 * Free all transmit software resources
1826 **/
e284fc88 1827void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
5eae00c5
GR		 1828{
1829 int i;
1830
cc052927 1831 for (i = 0; i < adapter->num_active_queues; i++)
5eae00c5
GR		 1832 if (adapter->tx_rings[i]->desc)
1833 i40evf_free_tx_resources(adapter->tx_rings[i]);
5eae00c5
GR		 1834}
1835
1836/**
1837 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1838 * @adapter: board private structure
1839 *
1840 * If this function returns with an error, then it's possible one or
1841 * more of the rings is populated (while the rest are not). It is the
1842 * callers duty to clean those orphaned rings.
1843 *
1844 * Return 0 on success, negative on failure
1845 **/
1846static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1847{
1848 int i, err = 0;
1849
cc052927 1850 for (i = 0; i < adapter->num_active_queues; i++) {
d732a184 1851 adapter->tx_rings[i]->count = adapter->tx_desc_count;
5eae00c5
GR		 1852 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1853 if (!err)
1854 continue;
1855 dev_err(&adapter->pdev->dev,
1856 "%s: Allocation for Tx Queue %u failed\n",
1857 __func__, i);
1858 break;
1859 }
1860
1861 return err;
1862}
1863
1864/**
1865 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1866 * @adapter: board private structure
1867 *
1868 * If this function returns with an error, then it's possible one or
1869 * more of the rings is populated (while the rest are not). It is the
1870 * callers duty to clean those orphaned rings.
1871 *
1872 * Return 0 on success, negative on failure
1873 **/
1874static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1875{
1876 int i, err = 0;
1877
cc052927 1878 for (i = 0; i < adapter->num_active_queues; i++) {
d732a184 1879 adapter->rx_rings[i]->count = adapter->rx_desc_count;
5eae00c5
GR		 1880 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1881 if (!err)
1882 continue;
1883 dev_err(&adapter->pdev->dev,
1884 "%s: Allocation for Rx Queue %u failed\n",
1885 __func__, i);
1886 break;
1887 }
1888 return err;
1889}
1890
1891/**
1892 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1893 * @adapter: board private structure
1894 *
1895 * Free all receive software resources
1896 **/
e284fc88 1897void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
5eae00c5
GR		 1898{
1899 int i;
1900
cc052927 1901 for (i = 0; i < adapter->num_active_queues; i++)
5eae00c5
GR		 1902 if (adapter->rx_rings[i]->desc)
1903 i40evf_free_rx_resources(adapter->rx_rings[i]);
1904}
1905
1906/**
1907 * i40evf_open - Called when a network interface is made active
1908 * @netdev: network interface device structure
1909 *
1910 * Returns 0 on success, negative value on failure
1911 *
1912 * The open entry point is called when a network interface is made
1913 * active by the system (IFF_UP). At this point all resources needed
1914 * for transmit and receive operations are allocated, the interrupt
1915 * handler is registered with the OS, the watchdog timer is started,
1916 * and the stack is notified that the interface is ready.
1917 **/
1918static int i40evf_open(struct net_device *netdev)
1919{
1920 struct i40evf_adapter *adapter = netdev_priv(netdev);
1921 int err;
1922
ef8693eb
MW		 1923 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1924 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1925 return -EIO;
1926 }
e284fc88 1927 if (adapter->state != __I40EVF_DOWN || adapter->aq_required)
5eae00c5
GR		 1928 return -EBUSY;
1929
1930 /* allocate transmit descriptors */
1931 err = i40evf_setup_all_tx_resources(adapter);
1932 if (err)
1933 goto err_setup_tx;
1934
1935 /* allocate receive descriptors */
1936 err = i40evf_setup_all_rx_resources(adapter);
1937 if (err)
1938 goto err_setup_rx;
1939
1940 /* clear any pending interrupts, may auto mask */
1941 err = i40evf_request_traffic_irqs(adapter, netdev->name);
1942 if (err)
1943 goto err_req_irq;
1944
44151cd3 1945 i40evf_add_filter(adapter, adapter->hw.mac.addr);
5eae00c5
GR		 1946 i40evf_configure(adapter);
1947
1948 err = i40evf_up_complete(adapter);
1949 if (err)
1950 goto err_req_irq;
1951
1952 i40evf_irq_enable(adapter, true);
1953
1954 return 0;
1955
1956err_req_irq:
1957 i40evf_down(adapter);
1958 i40evf_free_traffic_irqs(adapter);
1959err_setup_rx:
1960 i40evf_free_all_rx_resources(adapter);
1961err_setup_tx:
1962 i40evf_free_all_tx_resources(adapter);
1963
1964 return err;
1965}
1966
1967/**
1968 * i40evf_close - Disables a network interface
1969 * @netdev: network interface device structure
1970 *
1971 * Returns 0, this is not allowed to fail
1972 *
1973 * The close entry point is called when an interface is de-activated
1974 * by the OS. The hardware is still under the drivers control, but
1975 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1976 * are freed, along with all transmit and receive resources.
1977 **/
1978static int i40evf_close(struct net_device *netdev)
1979{
1980 struct i40evf_adapter *adapter = netdev_priv(netdev);
1981
ef8693eb
MW		 1982 if (adapter->state <= __I40EVF_DOWN)
1983 return 0;
1984
ef8693eb 1985
5eae00c5
GR		 1986 set_bit(__I40E_DOWN, &adapter->vsi.state);
1987
1988 i40evf_down(adapter);
ddf0b3a6 1989 adapter->state = __I40EVF_DOWN;
5eae00c5
GR		 1990 i40evf_free_traffic_irqs(adapter);
1991
5eae00c5
GR		 1992 return 0;
1993}
1994
1995/**
1996 * i40evf_get_stats - Get System Network Statistics
1997 * @netdev: network interface device structure
1998 *
1999 * Returns the address of the device statistics structure.
2000 * The statistics are actually updated from the timer callback.
2001 **/
2002static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
2003{
2004 struct i40evf_adapter *adapter = netdev_priv(netdev);
2005
2006 /* only return the current stats */
2007 return &adapter->net_stats;
2008}
2009
5eae00c5
GR		 2010/**
2011 * i40evf_change_mtu - Change the Maximum Transfer Unit
2012 * @netdev: network interface device structure
2013 * @new_mtu: new value for maximum frame size
2014 *
2015 * Returns 0 on success, negative on failure
2016 **/
2017static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
2018{
2019 struct i40evf_adapter *adapter = netdev_priv(netdev);
2020 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2021
2022 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
2023 return -EINVAL;
2024
5eae00c5 2025 netdev->mtu = new_mtu;
67c818a1
MW		 2026 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
2027 schedule_work(&adapter->reset_task);
2028
5eae00c5
GR		 2029 return 0;
2030}
2031
2032static const struct net_device_ops i40evf_netdev_ops = {
2033 .ndo_open = i40evf_open,
2034 .ndo_stop = i40evf_close,
2035 .ndo_start_xmit = i40evf_xmit_frame,
2036 .ndo_get_stats = i40evf_get_stats,
2037 .ndo_set_rx_mode = i40evf_set_rx_mode,
2038 .ndo_validate_addr = eth_validate_addr,
2039 .ndo_set_mac_address = i40evf_set_mac,
2040 .ndo_change_mtu = i40evf_change_mtu,
2041 .ndo_tx_timeout = i40evf_tx_timeout,
2042 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
2043 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
2044};
2045
2046/**
2047 * i40evf_check_reset_complete - check that VF reset is complete
2048 * @hw: pointer to hw struct
2049 *
2050 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
2051 **/
2052static int i40evf_check_reset_complete(struct i40e_hw *hw)
2053{
2054 u32 rstat;
2055 int i;
2056
2057 for (i = 0; i < 100; i++) {
fd35886a
AS		 2058 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
2059 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
2060 if ((rstat == I40E_VFR_VFACTIVE) ||
2061 (rstat == I40E_VFR_COMPLETED))
5eae00c5 2062 return 0;
f98a2006 2063 usleep_range(10, 20);
5eae00c5
GR		 2064 }
2065 return -EBUSY;
2066}
2067
e6d038de
MW		 2068/**
2069 * i40evf_process_config - Process the config information we got from the PF
2070 * @adapter: board private structure
2071 *
2072 * Verify that we have a valid config struct, and set up our netdev features
2073 * and our VSI struct.
2074 **/
2075int i40evf_process_config(struct i40evf_adapter *adapter)
2076{
2077 struct net_device *netdev = adapter->netdev;
2078 int i;
2079
2080 /* got VF config message back from PF, now we can parse it */
2081 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2082 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2083 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2084 }
2085 if (!adapter->vsi_res) {
2086 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
2087 return -ENODEV;
2088 }
2089
2090 if (adapter->vf_res->vf_offload_flags
2091 & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2092 netdev->vlan_features = netdev->features;
2093 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2094 NETIF_F_HW_VLAN_CTAG_RX |
2095 NETIF_F_HW_VLAN_CTAG_FILTER;
2096 }
2097 netdev->features |= NETIF_F_HIGHDMA |
2098 NETIF_F_SG |
2099 NETIF_F_IP_CSUM |
2100 NETIF_F_SCTP_CSUM |
2101 NETIF_F_IPV6_CSUM |
2102 NETIF_F_TSO |
2103 NETIF_F_TSO6 |
2104 NETIF_F_RXCSUM |
2105 NETIF_F_GRO;
2106
2107 /* copy netdev features into list of user selectable features */
2108 netdev->hw_features |= netdev->features;
2109 netdev->hw_features &= ~NETIF_F_RXCSUM;
2110
2111 adapter->vsi.id = adapter->vsi_res->vsi_id;
2112
2113 adapter->vsi.back = adapter;
2114 adapter->vsi.base_vector = 1;
2115 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2116 adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2117 ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2118 adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2119 ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2120 adapter->vsi.netdev = adapter->netdev;
2121 return 0;
2122}
2123
5eae00c5
GR		 2124/**
2125 * i40evf_init_task - worker thread to perform delayed initialization
2126 * @work: pointer to work_struct containing our data
2127 *
2128 * This task completes the work that was begun in probe. Due to the nature
2129 * of VF-PF communications, we may need to wait tens of milliseconds to get
dbedd44e 2130 * responses back from the PF. Rather than busy-wait in probe and bog down the
5eae00c5
GR		 2131 * whole system, we'll do it in a task so we can sleep.
2132 * This task only runs during driver init. Once we've established
2133 * communications with the PF driver and set up our netdev, the watchdog
2134 * takes over.
2135 **/
2136static void i40evf_init_task(struct work_struct *work)
2137{
2138 struct i40evf_adapter *adapter = container_of(work,
2139 struct i40evf_adapter,
2140 init_task.work);
2141 struct net_device *netdev = adapter->netdev;
5eae00c5
GR		 2142 struct i40e_hw *hw = &adapter->hw;
2143 struct pci_dev *pdev = adapter->pdev;
e6d038de 2144 int err, bufsz;
5eae00c5
GR		 2145
2146 switch (adapter->state) {
2147 case __I40EVF_STARTUP:
2148 /* driver loaded, probe complete */
ef8693eb
MW		 2149 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2150 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
5eae00c5
GR		 2151 err = i40e_set_mac_type(hw);
2152 if (err) {
c2a137cb
MW		 2153 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2154 err);
2619ef47 2155 goto err;
5eae00c5
GR		 2156 }
2157 err = i40evf_check_reset_complete(hw);
2158 if (err) {
0d9c7ea8 2159 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
75a64435 2160 err);
5eae00c5
GR		 2161 goto err;
2162 }
2163 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2164 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2165 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2166 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2167
2168 err = i40evf_init_adminq(hw);
2169 if (err) {
c2a137cb
MW		 2170 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2171 err);
5eae00c5
GR		 2172 goto err;
2173 }
2174 err = i40evf_send_api_ver(adapter);
2175 if (err) {
10bdd67b 2176 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
5eae00c5
GR		 2177 i40evf_shutdown_adminq(hw);
2178 goto err;
2179 }
2180 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2181 goto restart;
5eae00c5 2182 case __I40EVF_INIT_VERSION_CHECK:
10bdd67b 2183 if (!i40evf_asq_done(hw)) {
80e72893 2184 dev_err(&pdev->dev, "Admin queue command never completed\n");
906a6937
MW		 2185 i40evf_shutdown_adminq(hw);
2186 adapter->state = __I40EVF_STARTUP;
5eae00c5 2187 goto err;
10bdd67b 2188 }
5eae00c5
GR		 2189
2190 /* aq msg sent, awaiting reply */
2191 err = i40evf_verify_api_ver(adapter);
2192 if (err) {
d4f82fd3 2193 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
56f9920a 2194 err = i40evf_send_api_ver(adapter);
ee1693e5
MW		 2195 else
2196 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
2197 adapter->pf_version.major,
2198 adapter->pf_version.minor,
2199 I40E_VIRTCHNL_VERSION_MAJOR,
2200 I40E_VIRTCHNL_VERSION_MINOR);
5eae00c5
GR		 2201 goto err;
2202 }
2203 err = i40evf_send_vf_config_msg(adapter);
2204 if (err) {
3f2ab172 2205 dev_err(&pdev->dev, "Unable to send config request (%d)\n",
5eae00c5
GR		 2206 err);
2207 goto err;
2208 }
2209 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2210 goto restart;
5eae00c5
GR		 2211 case __I40EVF_INIT_GET_RESOURCES:
2212 /* aq msg sent, awaiting reply */
2213 if (!adapter->vf_res) {
2214 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2215 (I40E_MAX_VF_VSI *
2216 sizeof(struct i40e_virtchnl_vsi_resource));
2217 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
c2a137cb 2218 if (!adapter->vf_res)
5eae00c5 2219 goto err;
5eae00c5
GR		 2220 }
2221 err = i40evf_get_vf_config(adapter);
906a6937 2222 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
906a6937
MW		 2223 err = i40evf_send_vf_config_msg(adapter);
2224 goto err;
2225 }
5eae00c5 2226 if (err) {
c2a137cb
MW		 2227 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2228 err);
5eae00c5
GR		 2229 goto err_alloc;
2230 }
2231 adapter->state = __I40EVF_INIT_SW;
2232 break;
2233 default:
2234 goto err_alloc;
2235 }
e6d038de 2236 if (i40evf_process_config(adapter))
5eae00c5 2237 goto err_alloc;
e6d038de 2238 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 2239
2240 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2241
5eae00c5
GR		 2242 netdev->netdev_ops = &i40evf_netdev_ops;
2243 i40evf_set_ethtool_ops(netdev);
2244 netdev->watchdog_timeo = 5 * HZ;
3415e8ce 2245
5eae00c5 2246 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
b34f90e7 2247 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
c2a137cb 2248 adapter->hw.mac.addr);
5eae00c5
GR		 2249 random_ether_addr(adapter->hw.mac.addr);
2250 }
9a173901
GR		 2251 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2252 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
5eae00c5 2253
5eae00c5
GR		 2254 init_timer(&adapter->watchdog_timer);
2255 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2256 adapter->watchdog_timer.data = (unsigned long)adapter;
2257 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2258
cc052927
MW		 2259 adapter->num_active_queues = min_t(int,
2260 adapter->vsi_res->num_queue_pairs,
2261 (int)(num_online_cpus()));
d732a184
MW		 2262 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2263 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
5eae00c5
GR		 2264 err = i40evf_init_interrupt_scheme(adapter);
2265 if (err)
2266 goto err_sw_init;
2267 i40evf_map_rings_to_vectors(adapter);
e25d00b8
ASJ		 2268 if (!RSS_AQ(adapter))
2269 i40evf_configure_rss(adapter);
5eae00c5
GR		 2270 err = i40evf_request_misc_irq(adapter);
2271 if (err)
2272 goto err_sw_init;
2273
2274 netif_carrier_off(netdev);
2275
ef8693eb
MW		 2276 if (!adapter->netdev_registered) {
2277 err = register_netdev(netdev);
2278 if (err)
2279 goto err_register;
2280 }
5eae00c5
GR		 2281
2282 adapter->netdev_registered = true;
2283
2284 netif_tx_stop_all_queues(netdev);
2285
b34f90e7 2286 dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
5eae00c5
GR		 2287 if (netdev->features & NETIF_F_GRO)
2288 dev_info(&pdev->dev, "GRO is enabled\n");
2289
2290 dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2291 adapter->state = __I40EVF_DOWN;
2292 set_bit(__I40E_DOWN, &adapter->vsi.state);
2293 i40evf_misc_irq_enable(adapter);
e25d00b8
ASJ		 2294
2295 if (RSS_AQ(adapter)) {
2296 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
2297 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
2298 } else {
2299 i40evf_configure_rss(adapter);
2300 }
5eae00c5
GR		 2301 return;
2302restart:
2303 schedule_delayed_work(&adapter->init_task,
2304 msecs_to_jiffies(50));
2305 return;
2306
2307err_register:
2308 i40evf_free_misc_irq(adapter);
2309err_sw_init:
2310 i40evf_reset_interrupt_capability(adapter);
5eae00c5
GR		 2311err_alloc:
2312 kfree(adapter->vf_res);
2313 adapter->vf_res = NULL;
2314err:
2315 /* Things went into the weeds, so try again later */
2316 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
80e72893 2317 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
ef8693eb 2318 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
5eae00c5
GR		 2319 return; /* do not reschedule */
2320 }
2321 schedule_delayed_work(&adapter->init_task, HZ * 3);
5eae00c5
GR		 2322}
2323
2324/**
2325 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2326 * @pdev: pci device structure
2327 **/
2328static void i40evf_shutdown(struct pci_dev *pdev)
2329{
2330 struct net_device *netdev = pci_get_drvdata(pdev);
00293fdc 2331 struct i40evf_adapter *adapter = netdev_priv(netdev);
5eae00c5
GR		 2332
2333 netif_device_detach(netdev);
2334
2335 if (netif_running(netdev))
2336 i40evf_close(netdev);
2337
00293fdc
MW		 2338 /* Prevent the watchdog from running. */
2339 adapter->state = __I40EVF_REMOVE;
2340 adapter->aq_required = 0;
00293fdc 2341
5eae00c5
GR		 2342#ifdef CONFIG_PM
2343 pci_save_state(pdev);
2344
2345#endif
2346 pci_disable_device(pdev);
2347}
2348
2349/**
2350 * i40evf_probe - Device Initialization Routine
2351 * @pdev: PCI device information struct
2352 * @ent: entry in i40evf_pci_tbl
2353 *
2354 * Returns 0 on success, negative on failure
2355 *
2356 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2357 * The OS initialization, configuring of the adapter private structure,
2358 * and a hardware reset occur.
2359 **/
2360static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2361{
2362 struct net_device *netdev;
2363 struct i40evf_adapter *adapter = NULL;
2364 struct i40e_hw *hw = NULL;
dbbd8111 2365 int err;
5eae00c5
GR		 2366
2367 err = pci_enable_device(pdev);
2368 if (err)
2369 return err;
2370
6494294f 2371 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
6494294f 2372 if (err) {
e3e3bfdd
JS		 2373 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2374 if (err) {
2375 dev_err(&pdev->dev,
2376 "DMA configuration failed: 0x%x\n", err);
2377 goto err_dma;
2378 }
5eae00c5
GR		 2379 }
2380
2381 err = pci_request_regions(pdev, i40evf_driver_name);
2382 if (err) {
2383 dev_err(&pdev->dev,
2384 "pci_request_regions failed 0x%x\n", err);
2385 goto err_pci_reg;
2386 }
2387
2388 pci_enable_pcie_error_reporting(pdev);
2389
2390 pci_set_master(pdev);
2391
2392 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2393 MAX_TX_QUEUES);
2394 if (!netdev) {
2395 err = -ENOMEM;
2396 goto err_alloc_etherdev;
2397 }
2398
2399 SET_NETDEV_DEV(netdev, &pdev->dev);
2400
2401 pci_set_drvdata(pdev, netdev);
2402 adapter = netdev_priv(netdev);
5eae00c5
GR		 2403
2404 adapter->netdev = netdev;
2405 adapter->pdev = pdev;
2406
2407 hw = &adapter->hw;
2408 hw->back = adapter;
2409
41a1d04b 2410 adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
5eae00c5
GR		 2411 adapter->state = __I40EVF_STARTUP;
2412
2413 /* Call save state here because it relies on the adapter struct. */
2414 pci_save_state(pdev);
2415
2416 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2417 pci_resource_len(pdev, 0));
2418 if (!hw->hw_addr) {
2419 err = -EIO;
2420 goto err_ioremap;
2421 }
2422 hw->vendor_id = pdev->vendor;
2423 hw->device_id = pdev->device;
2424 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2425 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2426 hw->subsystem_device_id = pdev->subsystem_device;
2427 hw->bus.device = PCI_SLOT(pdev->devfn);
2428 hw->bus.func = PCI_FUNC(pdev->devfn);
2429
8bb1a540
SK		 2430 INIT_LIST_HEAD(&adapter->mac_filter_list);
2431 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2432
5eae00c5
GR		 2433 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2434 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2435 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2436 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2437 schedule_delayed_work(&adapter->init_task, 10);
2438
2439 return 0;
2440
2441err_ioremap:
2442 free_netdev(netdev);
2443err_alloc_etherdev:
2444 pci_release_regions(pdev);
2445err_pci_reg:
2446err_dma:
2447 pci_disable_device(pdev);
2448 return err;
2449}
2450
2451#ifdef CONFIG_PM
2452/**
2453 * i40evf_suspend - Power management suspend routine
2454 * @pdev: PCI device information struct
2455 * @state: unused
2456 *
2457 * Called when the system (VM) is entering sleep/suspend.
2458 **/
2459static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2460{
2461 struct net_device *netdev = pci_get_drvdata(pdev);
2462 struct i40evf_adapter *adapter = netdev_priv(netdev);
2463 int retval = 0;
2464
2465 netif_device_detach(netdev);
2466
2467 if (netif_running(netdev)) {
2468 rtnl_lock();
2469 i40evf_down(adapter);
2470 rtnl_unlock();
2471 }
2472 i40evf_free_misc_irq(adapter);
2473 i40evf_reset_interrupt_capability(adapter);
2474
2475 retval = pci_save_state(pdev);
2476 if (retval)
2477 return retval;
2478
2479 pci_disable_device(pdev);
2480
2481 return 0;
2482}
2483
2484/**
dbedd44e 2485 * i40evf_resume - Power management resume routine
5eae00c5
GR		 2486 * @pdev: PCI device information struct
2487 *
2488 * Called when the system (VM) is resumed from sleep/suspend.
2489 **/
2490static int i40evf_resume(struct pci_dev *pdev)
2491{
2492 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2493 struct net_device *netdev = adapter->netdev;
2494 u32 err;
2495
2496 pci_set_power_state(pdev, PCI_D0);
2497 pci_restore_state(pdev);
2498 /* pci_restore_state clears dev->state_saved so call
2499 * pci_save_state to restore it.
2500 */
2501 pci_save_state(pdev);
2502
2503 err = pci_enable_device_mem(pdev);
2504 if (err) {
2505 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2506 return err;
2507 }
2508 pci_set_master(pdev);
2509
2510 rtnl_lock();
2511 err = i40evf_set_interrupt_capability(adapter);
2512 if (err) {
2513 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2514 return err;
2515 }
2516 err = i40evf_request_misc_irq(adapter);
2517 rtnl_unlock();
2518 if (err) {
2519 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2520 return err;
2521 }
2522
2523 schedule_work(&adapter->reset_task);
2524
2525 netif_device_attach(netdev);
2526
2527 return err;
2528}
2529
2530#endif /* CONFIG_PM */
2531/**
2532 * i40evf_remove - Device Removal Routine
2533 * @pdev: PCI device information struct
2534 *
2535 * i40evf_remove is called by the PCI subsystem to alert the driver
2536 * that it should release a PCI device. The could be caused by a
2537 * Hot-Plug event, or because the driver is going to be removed from
2538 * memory.
2539 **/
2540static void i40evf_remove(struct pci_dev *pdev)
2541{
2542 struct net_device *netdev = pci_get_drvdata(pdev);
2543 struct i40evf_adapter *adapter = netdev_priv(netdev);
6ba36a24 2544 struct i40evf_mac_filter *f, *ftmp;
5eae00c5
GR		 2545 struct i40e_hw *hw = &adapter->hw;
2546
2547 cancel_delayed_work_sync(&adapter->init_task);
ef8693eb 2548 cancel_work_sync(&adapter->reset_task);
5eae00c5
GR		 2549
2550 if (adapter->netdev_registered) {
2551 unregister_netdev(netdev);
2552 adapter->netdev_registered = false;
2553 }
53d0b3ae 2554
f4a71881 2555 /* Shut down all the garbage mashers on the detention level */
5eae00c5 2556 adapter->state = __I40EVF_REMOVE;
f4a71881 2557 adapter->aq_required = 0;
f4a71881
MW		 2558 i40evf_request_reset(adapter);
2559 msleep(20);
2560 /* If the FW isn't responding, kick it once, but only once. */
2561 if (!i40evf_asq_done(hw)) {
2562 i40evf_request_reset(adapter);
2563 msleep(20);
2564 }
5eae00c5 2565
dbb01c8a 2566 if (adapter->msix_entries) {
5eae00c5 2567 i40evf_misc_irq_disable(adapter);
5eae00c5 2568 i40evf_free_misc_irq(adapter);
5eae00c5 2569 i40evf_reset_interrupt_capability(adapter);
d31944d6 2570 i40evf_free_q_vectors(adapter);
5eae00c5
GR		 2571 }
2572
e5d17c3e
MW		 2573 if (adapter->watchdog_timer.function)
2574 del_timer_sync(&adapter->watchdog_timer);
2575
dbb01c8a
MW		 2576 flush_scheduled_work();
2577
5eae00c5
GR		 2578 if (hw->aq.asq.count)
2579 i40evf_shutdown_adminq(hw);
2580
2581 iounmap(hw->hw_addr);
2582 pci_release_regions(pdev);
2583
e284fc88
MW		 2584 i40evf_free_all_tx_resources(adapter);
2585 i40evf_free_all_rx_resources(adapter);
5eae00c5
GR		 2586 i40evf_free_queues(adapter);
2587 kfree(adapter->vf_res);
6ba36a24
MW		 2588 /* If we got removed before an up/down sequence, we've got a filter
2589 * hanging out there that we need to get rid of.
2590 */
2591 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2592 list_del(&f->list);
2593 kfree(f);
2594 }
37dfdf37
MW		 2595 list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2596 list_del(&f->list);
2597 kfree(f);
2598 }
5eae00c5
GR		 2599
2600 free_netdev(netdev);
2601
2602 pci_disable_pcie_error_reporting(pdev);
2603
2604 pci_disable_device(pdev);
2605}
2606
2607static struct pci_driver i40evf_driver = {
2608 .name = i40evf_driver_name,
2609 .id_table = i40evf_pci_tbl,
2610 .probe = i40evf_probe,
2611 .remove = i40evf_remove,
2612#ifdef CONFIG_PM
2613 .suspend = i40evf_suspend,
2614 .resume = i40evf_resume,
2615#endif
2616 .shutdown = i40evf_shutdown,
2617};
2618
2619/**
2620 * i40e_init_module - Driver Registration Routine
2621 *
2622 * i40e_init_module is the first routine called when the driver is
2623 * loaded. All it does is register with the PCI subsystem.
2624 **/
2625static int __init i40evf_init_module(void)
2626{
2627 int ret;
75a64435 2628
5eae00c5 2629 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
75a64435 2630 i40evf_driver_version);
5eae00c5
GR		 2631
2632 pr_info("%s\n", i40evf_copyright);
2633
2634 ret = pci_register_driver(&i40evf_driver);
2635 return ret;
2636}
2637
2638module_init(i40evf_init_module);
2639
2640/**
2641 * i40e_exit_module - Driver Exit Cleanup Routine
2642 *
2643 * i40e_exit_module is called just before the driver is removed
2644 * from memory.
2645 **/
2646static void __exit i40evf_exit_module(void)
2647{
2648 pci_unregister_driver(&i40evf_driver);
2649}
2650
2651module_exit(i40evf_exit_module);
2652
2653/* i40evf_main.c */
Linux kernel - Deliverables
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