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i40evf: ignore bogus messages from FW
[deliverable/linux.git] / drivers / net / ethernet / intel / i40evf / i40evf_main.c
CommitLineData
5eae00c5
GR		 1/*******************************************************************************
2 *
3 * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
e1dfee8e 4 * Copyright(c) 2013 - 2014 Intel Corporation.
5eae00c5
GR		 5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
b831607d
JB		 15 * You should have received a copy of the GNU General Public License along
16 * with this program. If not, see <http://www.gnu.org/licenses/>.
17 *
5eae00c5
GR		 18 * The full GNU General Public License is included in this distribution in
19 * the file called "COPYING".
20 *
21 * Contact Information:
22 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24 *
25 ******************************************************************************/
26
27#include "i40evf.h"
28#include "i40e_prototype.h"
29static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter);
30static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter);
169f4076
MW		 31static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter);
32static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter);
5eae00c5
GR		 33static int i40evf_close(struct net_device *netdev);
34
35char i40evf_driver_name[] = "i40evf";
36static const char i40evf_driver_string[] =
0af56f44 37 "Intel(R) XL710/X710 Virtual Function Network Driver";
5eae00c5 38
300c34c1 39#define DRV_VERSION "1.2.0"
5eae00c5
GR		 40const char i40evf_driver_version[] = DRV_VERSION;
41static const char i40evf_copyright[] =
673f2ebf 42 "Copyright (c) 2013 - 2014 Intel Corporation.";
5eae00c5
GR		 43
44/* i40evf_pci_tbl - PCI Device ID Table
45 *
46 * Wildcard entries (PCI_ANY_ID) should come last
47 * Last entry must be all 0s
48 *
49 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
50 * Class, Class Mask, private data (not used) }
51 */
9baa3c34 52static const struct pci_device_id i40evf_pci_tbl[] = {
ab60085e 53 {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
5eae00c5
GR		 54 /* required last entry */
55 {0, }
56};
57
58MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
59
60MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
61MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
62MODULE_LICENSE("GPL");
63MODULE_VERSION(DRV_VERSION);
64
65/**
66 * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
67 * @hw: pointer to the HW structure
68 * @mem: ptr to mem struct to fill out
69 * @size: size of memory requested
70 * @alignment: what to align the allocation to
71 **/
72i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
73 struct i40e_dma_mem *mem,
74 u64 size, u32 alignment)
75{
76 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
77
78 if (!mem)
79 return I40E_ERR_PARAM;
80
81 mem->size = ALIGN(size, alignment);
82 mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
83 (dma_addr_t *)&mem->pa, GFP_KERNEL);
84 if (mem->va)
85 return 0;
86 else
87 return I40E_ERR_NO_MEMORY;
88}
89
90/**
91 * i40evf_free_dma_mem_d - OS specific memory free for shared code
92 * @hw: pointer to the HW structure
93 * @mem: ptr to mem struct to free
94 **/
95i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
96{
97 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
98
99 if (!mem || !mem->va)
100 return I40E_ERR_PARAM;
101 dma_free_coherent(&adapter->pdev->dev, mem->size,
102 mem->va, (dma_addr_t)mem->pa);
103 return 0;
104}
105
106/**
107 * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
108 * @hw: pointer to the HW structure
109 * @mem: ptr to mem struct to fill out
110 * @size: size of memory requested
111 **/
112i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
113 struct i40e_virt_mem *mem, u32 size)
114{
115 if (!mem)
116 return I40E_ERR_PARAM;
117
118 mem->size = size;
119 mem->va = kzalloc(size, GFP_KERNEL);
120
121 if (mem->va)
122 return 0;
123 else
124 return I40E_ERR_NO_MEMORY;
125}
126
127/**
128 * i40evf_free_virt_mem_d - OS specific memory free for shared code
129 * @hw: pointer to the HW structure
130 * @mem: ptr to mem struct to free
131 **/
132i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
133 struct i40e_virt_mem *mem)
134{
135 if (!mem)
136 return I40E_ERR_PARAM;
137
138 /* it's ok to kfree a NULL pointer */
139 kfree(mem->va);
140
141 return 0;
142}
143
144/**
145 * i40evf_debug_d - OS dependent version of debug printing
146 * @hw: pointer to the HW structure
147 * @mask: debug level mask
148 * @fmt_str: printf-type format description
149 **/
150void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
151{
152 char buf[512];
153 va_list argptr;
154
155 if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
156 return;
157
158 va_start(argptr, fmt_str);
159 vsnprintf(buf, sizeof(buf), fmt_str, argptr);
160 va_end(argptr);
161
162 /* the debug string is already formatted with a newline */
163 pr_info("%s", buf);
164}
165
166/**
167 * i40evf_tx_timeout - Respond to a Tx Hang
168 * @netdev: network interface device structure
169 **/
170static void i40evf_tx_timeout(struct net_device *netdev)
171{
172 struct i40evf_adapter *adapter = netdev_priv(netdev);
173
174 adapter->tx_timeout_count++;
625777e3 175 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) {
3526d800 176 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
625777e3
MW		 177 schedule_work(&adapter->reset_task);
178 }
5eae00c5
GR		 179}
180
181/**
182 * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
183 * @adapter: board private structure
184 **/
185static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
186{
187 struct i40e_hw *hw = &adapter->hw;
75a64435 188
5eae00c5
GR		 189 wr32(hw, I40E_VFINT_DYN_CTL01, 0);
190
191 /* read flush */
192 rd32(hw, I40E_VFGEN_RSTAT);
193
194 synchronize_irq(adapter->msix_entries[0].vector);
195}
196
197/**
198 * i40evf_misc_irq_enable - Enable default interrupt generation settings
199 * @adapter: board private structure
200 **/
201static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
202{
203 struct i40e_hw *hw = &adapter->hw;
75a64435 204
5eae00c5
GR		 205 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
206 I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
207 wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA_ADMINQ_MASK);
208
209 /* read flush */
210 rd32(hw, I40E_VFGEN_RSTAT);
211}
212
213/**
214 * i40evf_irq_disable - Mask off interrupt generation on the NIC
215 * @adapter: board private structure
216 **/
217static void i40evf_irq_disable(struct i40evf_adapter *adapter)
218{
219 int i;
220 struct i40e_hw *hw = &adapter->hw;
221
dbb01c8a
MW		 222 if (!adapter->msix_entries)
223 return;
224
5eae00c5
GR		 225 for (i = 1; i < adapter->num_msix_vectors; i++) {
226 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
227 synchronize_irq(adapter->msix_entries[i].vector);
228 }
229 /* read flush */
230 rd32(hw, I40E_VFGEN_RSTAT);
5eae00c5
GR		 231}
232
233/**
234 * i40evf_irq_enable_queues - Enable interrupt for specified queues
235 * @adapter: board private structure
236 * @mask: bitmap of queues to enable
237 **/
238void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
239{
240 struct i40e_hw *hw = &adapter->hw;
241 int i;
242
243 for (i = 1; i < adapter->num_msix_vectors; i++) {
244 if (mask & (1 << (i - 1))) {
245 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
246 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
247 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
248 }
249 }
250}
251
252/**
253 * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
254 * @adapter: board private structure
255 * @mask: bitmap of vectors to trigger
256 **/
75a64435 257static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
5eae00c5
GR		 258{
259 struct i40e_hw *hw = &adapter->hw;
260 int i;
261 uint32_t dyn_ctl;
262
164ec1bf
MW		 263 if (mask & 1) {
264 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
265 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
266 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
267 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
268 }
5eae00c5
GR		 269 for (i = 1; i < adapter->num_msix_vectors; i++) {
270 if (mask & (1 << i)) {
271 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
272 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
273 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
274 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
275 }
276 }
277}
278
279/**
280 * i40evf_irq_enable - Enable default interrupt generation settings
281 * @adapter: board private structure
282 **/
283void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
284{
285 struct i40e_hw *hw = &adapter->hw;
286
164ec1bf 287 i40evf_misc_irq_enable(adapter);
5eae00c5
GR		 288 i40evf_irq_enable_queues(adapter, ~0);
289
290 if (flush)
291 rd32(hw, I40E_VFGEN_RSTAT);
292}
293
294/**
295 * i40evf_msix_aq - Interrupt handler for vector 0
296 * @irq: interrupt number
297 * @data: pointer to netdev
298 **/
299static irqreturn_t i40evf_msix_aq(int irq, void *data)
300{
301 struct net_device *netdev = data;
302 struct i40evf_adapter *adapter = netdev_priv(netdev);
303 struct i40e_hw *hw = &adapter->hw;
304 u32 val;
305 u32 ena_mask;
306
307 /* handle non-queue interrupts */
308 val = rd32(hw, I40E_VFINT_ICR01);
309 ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
310
311
312 val = rd32(hw, I40E_VFINT_DYN_CTL01);
313 val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
314 wr32(hw, I40E_VFINT_DYN_CTL01, val);
315
5eae00c5
GR		 316 /* schedule work on the private workqueue */
317 schedule_work(&adapter->adminq_task);
318
319 return IRQ_HANDLED;
320}
321
322/**
323 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
324 * @irq: interrupt number
325 * @data: pointer to a q_vector
326 **/
327static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
328{
329 struct i40e_q_vector *q_vector = data;
330
331 if (!q_vector->tx.ring && !q_vector->rx.ring)
332 return IRQ_HANDLED;
333
334 napi_schedule(&q_vector->napi);
335
336 return IRQ_HANDLED;
337}
338
339/**
340 * i40evf_map_vector_to_rxq - associate irqs with rx queues
341 * @adapter: board private structure
342 * @v_idx: interrupt number
343 * @r_idx: queue number
344 **/
345static void
346i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
347{
348 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
349 struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
350
351 rx_ring->q_vector = q_vector;
352 rx_ring->next = q_vector->rx.ring;
353 rx_ring->vsi = &adapter->vsi;
354 q_vector->rx.ring = rx_ring;
355 q_vector->rx.count++;
356 q_vector->rx.latency_range = I40E_LOW_LATENCY;
357}
358
359/**
360 * i40evf_map_vector_to_txq - associate irqs with tx queues
361 * @adapter: board private structure
362 * @v_idx: interrupt number
363 * @t_idx: queue number
364 **/
365static void
366i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
367{
368 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
369 struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
370
371 tx_ring->q_vector = q_vector;
372 tx_ring->next = q_vector->tx.ring;
373 tx_ring->vsi = &adapter->vsi;
374 q_vector->tx.ring = tx_ring;
375 q_vector->tx.count++;
376 q_vector->tx.latency_range = I40E_LOW_LATENCY;
377 q_vector->num_ringpairs++;
378 q_vector->ring_mask |= (1 << t_idx);
379}
380
381/**
382 * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
383 * @adapter: board private structure to initialize
384 *
385 * This function maps descriptor rings to the queue-specific vectors
386 * we were allotted through the MSI-X enabling code. Ideally, we'd have
387 * one vector per ring/queue, but on a constrained vector budget, we
388 * group the rings as "efficiently" as possible. You would add new
389 * mapping configurations in here.
390 **/
391static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
392{
393 int q_vectors;
394 int v_start = 0;
395 int rxr_idx = 0, txr_idx = 0;
cc052927
MW		 396 int rxr_remaining = adapter->num_active_queues;
397 int txr_remaining = adapter->num_active_queues;
5eae00c5
GR		 398 int i, j;
399 int rqpv, tqpv;
400 int err = 0;
401
402 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
403
404 /* The ideal configuration...
405 * We have enough vectors to map one per queue.
406 */
407 if (q_vectors == (rxr_remaining * 2)) {
408 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
409 i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
410
411 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
412 i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
413 goto out;
414 }
415
416 /* If we don't have enough vectors for a 1-to-1
417 * mapping, we'll have to group them so there are
418 * multiple queues per vector.
419 * Re-adjusting *qpv takes care of the remainder.
420 */
421 for (i = v_start; i < q_vectors; i++) {
422 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
423 for (j = 0; j < rqpv; j++) {
424 i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
425 rxr_idx++;
426 rxr_remaining--;
427 }
428 }
429 for (i = v_start; i < q_vectors; i++) {
430 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
431 for (j = 0; j < tqpv; j++) {
432 i40evf_map_vector_to_txq(adapter, i, txr_idx);
433 txr_idx++;
434 txr_remaining--;
435 }
436 }
437
438out:
439 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
440
441 return err;
442}
443
444/**
445 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
446 * @adapter: board private structure
447 *
448 * Allocates MSI-X vectors for tx and rx handling, and requests
449 * interrupts from the kernel.
450 **/
451static int
452i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
453{
454 int vector, err, q_vectors;
455 int rx_int_idx = 0, tx_int_idx = 0;
456
457 i40evf_irq_disable(adapter);
458 /* Decrement for Other and TCP Timer vectors */
459 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
460
461 for (vector = 0; vector < q_vectors; vector++) {
462 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
463
464 if (q_vector->tx.ring && q_vector->rx.ring) {
465 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
466 "i40evf-%s-%s-%d", basename,
467 "TxRx", rx_int_idx++);
468 tx_int_idx++;
469 } else if (q_vector->rx.ring) {
470 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
471 "i40evf-%s-%s-%d", basename,
472 "rx", rx_int_idx++);
473 } else if (q_vector->tx.ring) {
474 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
475 "i40evf-%s-%s-%d", basename,
476 "tx", tx_int_idx++);
477 } else {
478 /* skip this unused q_vector */
479 continue;
480 }
481 err = request_irq(
482 adapter->msix_entries[vector + NONQ_VECS].vector,
483 i40evf_msix_clean_rings,
484 0,
485 q_vector->name,
486 q_vector);
487 if (err) {
488 dev_info(&adapter->pdev->dev,
489 "%s: request_irq failed, error: %d\n",
490 __func__, err);
491 goto free_queue_irqs;
492 }
493 /* assign the mask for this irq */
494 irq_set_affinity_hint(
495 adapter->msix_entries[vector + NONQ_VECS].vector,
496 q_vector->affinity_mask);
497 }
498
499 return 0;
500
501free_queue_irqs:
502 while (vector) {
503 vector--;
504 irq_set_affinity_hint(
505 adapter->msix_entries[vector + NONQ_VECS].vector,
506 NULL);
507 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
508 adapter->q_vector[vector]);
509 }
510 return err;
511}
512
513/**
514 * i40evf_request_misc_irq - Initialize MSI-X interrupts
515 * @adapter: board private structure
516 *
517 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
518 * vector is only for the admin queue, and stays active even when the netdev
519 * is closed.
520 **/
521static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
522{
523 struct net_device *netdev = adapter->netdev;
524 int err;
525
b39c1e2c
JB		 526 snprintf(adapter->misc_vector_name,
527 sizeof(adapter->misc_vector_name) - 1, "i40evf:mbx");
5eae00c5 528 err = request_irq(adapter->msix_entries[0].vector,
e1dfee8e
MW		 529 &i40evf_msix_aq, 0,
530 adapter->misc_vector_name, netdev);
5eae00c5
GR		 531 if (err) {
532 dev_err(&adapter->pdev->dev,
77fa28be
CS		 533 "request_irq for %s failed: %d\n",
534 adapter->misc_vector_name, err);
5eae00c5
GR		 535 free_irq(adapter->msix_entries[0].vector, netdev);
536 }
537 return err;
538}
539
540/**
541 * i40evf_free_traffic_irqs - Free MSI-X interrupts
542 * @adapter: board private structure
543 *
544 * Frees all MSI-X vectors other than 0.
545 **/
546static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
547{
548 int i;
549 int q_vectors;
75a64435 550
5eae00c5
GR		 551 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
552
553 for (i = 0; i < q_vectors; i++) {
554 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
555 NULL);
556 free_irq(adapter->msix_entries[i+1].vector,
557 adapter->q_vector[i]);
558 }
559}
560
561/**
562 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
563 * @adapter: board private structure
564 *
565 * Frees MSI-X vector 0.
566 **/
567static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
568{
569 struct net_device *netdev = adapter->netdev;
570
571 free_irq(adapter->msix_entries[0].vector, netdev);
572}
573
574/**
575 * i40evf_configure_tx - Configure Transmit Unit after Reset
576 * @adapter: board private structure
577 *
578 * Configure the Tx unit of the MAC after a reset.
579 **/
580static void i40evf_configure_tx(struct i40evf_adapter *adapter)
581{
582 struct i40e_hw *hw = &adapter->hw;
583 int i;
75a64435 584
cc052927 585 for (i = 0; i < adapter->num_active_queues; i++)
5eae00c5
GR		 586 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
587}
588
589/**
590 * i40evf_configure_rx - Configure Receive Unit after Reset
591 * @adapter: board private structure
592 *
593 * Configure the Rx unit of the MAC after a reset.
594 **/
595static void i40evf_configure_rx(struct i40evf_adapter *adapter)
596{
597 struct i40e_hw *hw = &adapter->hw;
598 struct net_device *netdev = adapter->netdev;
599 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
600 int i;
601 int rx_buf_len;
602
603
604 adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
605 adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
606
607 /* Decide whether to use packet split mode or not */
608 if (netdev->mtu > ETH_DATA_LEN) {
609 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
610 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
611 else
612 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
613 } else {
614 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
615 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
616 else
617 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
618 }
619
620 /* Set the RX buffer length according to the mode */
621 if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
622 rx_buf_len = I40E_RX_HDR_SIZE;
623 } else {
624 if (netdev->mtu <= ETH_DATA_LEN)
625 rx_buf_len = I40EVF_RXBUFFER_2048;
626 else
627 rx_buf_len = ALIGN(max_frame, 1024);
628 }
629
cc052927 630 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5
GR		 631 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
632 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
633 }
634}
635
636/**
637 * i40evf_find_vlan - Search filter list for specific vlan filter
638 * @adapter: board private structure
639 * @vlan: vlan tag
640 *
641 * Returns ptr to the filter object or NULL
642 **/
643static struct
644i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
645{
646 struct i40evf_vlan_filter *f;
647
648 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
649 if (vlan == f->vlan)
650 return f;
651 }
652 return NULL;
653}
654
655/**
656 * i40evf_add_vlan - Add a vlan filter to the list
657 * @adapter: board private structure
658 * @vlan: VLAN tag
659 *
660 * Returns ptr to the filter object or NULL when no memory available.
661 **/
662static struct
663i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
664{
665 struct i40evf_vlan_filter *f;
666
667 f = i40evf_find_vlan(adapter, vlan);
348d4994 668 if (!f) {
5eae00c5 669 f = kzalloc(sizeof(*f), GFP_ATOMIC);
348d4994 670 if (!f)
5eae00c5 671 return NULL;
249c8b8d 672
5eae00c5
GR		 673 f->vlan = vlan;
674
675 INIT_LIST_HEAD(&f->list);
676 list_add(&f->list, &adapter->vlan_filter_list);
677 f->add = true;
678 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
679 }
680
681 return f;
682}
683
684/**
685 * i40evf_del_vlan - Remove a vlan filter from the list
686 * @adapter: board private structure
687 * @vlan: VLAN tag
688 **/
689static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
690{
691 struct i40evf_vlan_filter *f;
692
693 f = i40evf_find_vlan(adapter, vlan);
694 if (f) {
695 f->remove = true;
696 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
697 }
5eae00c5
GR		 698}
699
700/**
701 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
702 * @netdev: network device struct
703 * @vid: VLAN tag
704 **/
705static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
75a64435 706 __always_unused __be16 proto, u16 vid)
5eae00c5
GR		 707{
708 struct i40evf_adapter *adapter = netdev_priv(netdev);
709
710 if (i40evf_add_vlan(adapter, vid) == NULL)
711 return -ENOMEM;
712 return 0;
713}
714
715/**
716 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
717 * @netdev: network device struct
718 * @vid: VLAN tag
719 **/
720static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
75a64435 721 __always_unused __be16 proto, u16 vid)
5eae00c5
GR		 722{
723 struct i40evf_adapter *adapter = netdev_priv(netdev);
724
725 i40evf_del_vlan(adapter, vid);
726 return 0;
727}
728
729/**
730 * i40evf_find_filter - Search filter list for specific mac filter
731 * @adapter: board private structure
732 * @macaddr: the MAC address
733 *
734 * Returns ptr to the filter object or NULL
735 **/
736static struct
737i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
738 u8 *macaddr)
739{
740 struct i40evf_mac_filter *f;
741
742 if (!macaddr)
743 return NULL;
744
745 list_for_each_entry(f, &adapter->mac_filter_list, list) {
746 if (ether_addr_equal(macaddr, f->macaddr))
747 return f;
748 }
749 return NULL;
750}
751
752/**
753 * i40e_add_filter - Add a mac filter to the filter list
754 * @adapter: board private structure
755 * @macaddr: the MAC address
756 *
757 * Returns ptr to the filter object or NULL when no memory available.
758 **/
759static struct
760i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
761 u8 *macaddr)
762{
763 struct i40evf_mac_filter *f;
764
765 if (!macaddr)
766 return NULL;
767
768 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
769 &adapter->crit_section))
b65476cd 770 udelay(1);
5eae00c5
GR		 771
772 f = i40evf_find_filter(adapter, macaddr);
348d4994 773 if (!f) {
5eae00c5 774 f = kzalloc(sizeof(*f), GFP_ATOMIC);
348d4994 775 if (!f) {
5eae00c5
GR		 776 clear_bit(__I40EVF_IN_CRITICAL_TASK,
777 &adapter->crit_section);
778 return NULL;
779 }
780
9a173901 781 ether_addr_copy(f->macaddr, macaddr);
5eae00c5
GR		 782
783 list_add(&f->list, &adapter->mac_filter_list);
784 f->add = true;
785 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
786 }
787
788 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
789 return f;
790}
791
792/**
793 * i40evf_set_mac - NDO callback to set port mac address
794 * @netdev: network interface device structure
795 * @p: pointer to an address structure
796 *
797 * Returns 0 on success, negative on failure
798 **/
799static int i40evf_set_mac(struct net_device *netdev, void *p)
800{
801 struct i40evf_adapter *adapter = netdev_priv(netdev);
802 struct i40e_hw *hw = &adapter->hw;
803 struct i40evf_mac_filter *f;
804 struct sockaddr *addr = p;
805
806 if (!is_valid_ether_addr(addr->sa_data))
807 return -EADDRNOTAVAIL;
808
809 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
810 return 0;
811
812 f = i40evf_add_filter(adapter, addr->sa_data);
813 if (f) {
9a173901
GR		 814 ether_addr_copy(hw->mac.addr, addr->sa_data);
815 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
5eae00c5
GR		 816 }
817
818 return (f == NULL) ? -ENOMEM : 0;
819}
820
821/**
822 * i40evf_set_rx_mode - NDO callback to set the netdev filters
823 * @netdev: network interface device structure
824 **/
825static void i40evf_set_rx_mode(struct net_device *netdev)
826{
827 struct i40evf_adapter *adapter = netdev_priv(netdev);
828 struct i40evf_mac_filter *f, *ftmp;
829 struct netdev_hw_addr *uca;
830 struct netdev_hw_addr *mca;
831
832 /* add addr if not already in the filter list */
833 netdev_for_each_uc_addr(uca, netdev) {
834 i40evf_add_filter(adapter, uca->addr);
835 }
836 netdev_for_each_mc_addr(mca, netdev) {
837 i40evf_add_filter(adapter, mca->addr);
838 }
839
840 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
841 &adapter->crit_section))
b65476cd 842 udelay(1);
5eae00c5
GR		 843 /* remove filter if not in netdev list */
844 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
845 bool found = false;
846
dc5f2de6 847 if (is_multicast_ether_addr(f->macaddr)) {
5eae00c5
GR		 848 netdev_for_each_mc_addr(mca, netdev) {
849 if (ether_addr_equal(mca->addr, f->macaddr)) {
850 found = true;
851 break;
852 }
853 }
854 } else {
855 netdev_for_each_uc_addr(uca, netdev) {
856 if (ether_addr_equal(uca->addr, f->macaddr)) {
857 found = true;
858 break;
859 }
860 }
861 }
862 if (found) {
863 f->remove = true;
864 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
865 }
866 }
867 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
868}
869
870/**
871 * i40evf_napi_enable_all - enable NAPI on all queue vectors
872 * @adapter: board private structure
873 **/
874static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
875{
876 int q_idx;
877 struct i40e_q_vector *q_vector;
878 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
879
880 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
881 struct napi_struct *napi;
75a64435 882
5eae00c5
GR		 883 q_vector = adapter->q_vector[q_idx];
884 napi = &q_vector->napi;
885 napi_enable(napi);
886 }
887}
888
889/**
890 * i40evf_napi_disable_all - disable NAPI on all queue vectors
891 * @adapter: board private structure
892 **/
893static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
894{
895 int q_idx;
896 struct i40e_q_vector *q_vector;
897 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
898
899 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
900 q_vector = adapter->q_vector[q_idx];
901 napi_disable(&q_vector->napi);
902 }
903}
904
905/**
906 * i40evf_configure - set up transmit and receive data structures
907 * @adapter: board private structure
908 **/
909static void i40evf_configure(struct i40evf_adapter *adapter)
910{
911 struct net_device *netdev = adapter->netdev;
912 int i;
913
914 i40evf_set_rx_mode(netdev);
915
916 i40evf_configure_tx(adapter);
917 i40evf_configure_rx(adapter);
918 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
919
cc052927 920 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5 921 struct i40e_ring *ring = adapter->rx_rings[i];
75a64435 922
5eae00c5
GR		 923 i40evf_alloc_rx_buffers(ring, ring->count);
924 ring->next_to_use = ring->count - 1;
925 writel(ring->next_to_use, ring->tail);
926 }
927}
928
929/**
930 * i40evf_up_complete - Finish the last steps of bringing up a connection
931 * @adapter: board private structure
932 **/
933static int i40evf_up_complete(struct i40evf_adapter *adapter)
934{
935 adapter->state = __I40EVF_RUNNING;
936 clear_bit(__I40E_DOWN, &adapter->vsi.state);
937
938 i40evf_napi_enable_all(adapter);
939
940 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
941 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
942 return 0;
943}
944
5eae00c5
GR		 945/**
946 * i40e_down - Shutdown the connection processing
947 * @adapter: board private structure
948 **/
949void i40evf_down(struct i40evf_adapter *adapter)
950{
951 struct net_device *netdev = adapter->netdev;
952 struct i40evf_mac_filter *f;
953
ddf0b3a6
MW		 954 if (adapter->state == __I40EVF_DOWN)
955 return;
956
53d0b3ae
MW		 957 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
958 &adapter->crit_section))
959 usleep_range(500, 1000);
960
961 i40evf_irq_disable(adapter);
962
ef8693eb 963 /* remove all MAC filters */
5eae00c5
GR		 964 list_for_each_entry(f, &adapter->mac_filter_list, list) {
965 f->remove = true;
966 }
ed1f5b58
MW		 967 /* remove all VLAN filters */
968 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
969 f->remove = true;
970 }
ef8693eb
MW		 971 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
972 adapter->state != __I40EVF_RESETTING) {
53d0b3ae
MW		 973 /* cancel any current operation */
974 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
975 adapter->aq_pending = 0;
976 /* Schedule operations to close down the HW. Don't wait
977 * here for this to complete. The watchdog is still running
978 * and it will take care of this.
979 */
980 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
ed1f5b58 981 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
ef8693eb 982 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
ef8693eb 983 }
5eae00c5
GR		 984 netif_tx_disable(netdev);
985
986 netif_tx_stop_all_queues(netdev);
987
5eae00c5
GR		 988 i40evf_napi_disable_all(adapter);
989
53d0b3ae
MW		 990 msleep(20);
991
5eae00c5 992 netif_carrier_off(netdev);
53d0b3ae 993 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
5eae00c5
GR		 994}
995
996/**
997 * i40evf_acquire_msix_vectors - Setup the MSIX capability
998 * @adapter: board private structure
999 * @vectors: number of vectors to request
1000 *
1001 * Work with the OS to set up the MSIX vectors needed.
1002 *
1003 * Returns 0 on success, negative on failure
1004 **/
1005static int
1006i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1007{
1008 int err, vector_threshold;
1009
1010 /* We'll want at least 3 (vector_threshold):
1011 * 0) Other (Admin Queue and link, mostly)
1012 * 1) TxQ[0] Cleanup
1013 * 2) RxQ[0] Cleanup
1014 */
1015 vector_threshold = MIN_MSIX_COUNT;
1016
1017 /* The more we get, the more we will assign to Tx/Rx Cleanup
1018 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1019 * Right now, we simply care about how many we'll get; we'll
1020 * set them up later while requesting irq's.
1021 */
fc2f2f5d
AG		 1022 err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1023 vector_threshold, vectors);
1024 if (err < 0) {
80e72893 1025 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
5eae00c5
GR		 1026 kfree(adapter->msix_entries);
1027 adapter->msix_entries = NULL;
fc2f2f5d 1028 return err;
5eae00c5 1029 }
fc2f2f5d
AG		 1030
1031 /* Adjust for only the vectors we'll use, which is minimum
1032 * of max_msix_q_vectors + NONQ_VECS, or the number of
1033 * vectors we were allocated.
1034 */
1035 adapter->num_msix_vectors = err;
1036 return 0;
5eae00c5
GR		 1037}
1038
1039/**
1040 * i40evf_free_queues - Free memory for all rings
1041 * @adapter: board private structure to initialize
1042 *
1043 * Free all of the memory associated with queue pairs.
1044 **/
1045static void i40evf_free_queues(struct i40evf_adapter *adapter)
1046{
1047 int i;
1048
1049 if (!adapter->vsi_res)
1050 return;
cc052927 1051 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5
GR		 1052 if (adapter->tx_rings[i])
1053 kfree_rcu(adapter->tx_rings[i], rcu);
1054 adapter->tx_rings[i] = NULL;
1055 adapter->rx_rings[i] = NULL;
1056 }
1057}
1058
1059/**
1060 * i40evf_alloc_queues - Allocate memory for all rings
1061 * @adapter: board private structure to initialize
1062 *
1063 * We allocate one ring per queue at run-time since we don't know the
1064 * number of queues at compile-time. The polling_netdev array is
1065 * intended for Multiqueue, but should work fine with a single queue.
1066 **/
1067static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1068{
1069 int i;
1070
cc052927 1071 for (i = 0; i < adapter->num_active_queues; i++) {
5eae00c5
GR		 1072 struct i40e_ring *tx_ring;
1073 struct i40e_ring *rx_ring;
1074
75a64435 1075 tx_ring = kzalloc(sizeof(*tx_ring) * 2, GFP_KERNEL);
5eae00c5
GR		 1076 if (!tx_ring)
1077 goto err_out;
1078
1079 tx_ring->queue_index = i;
1080 tx_ring->netdev = adapter->netdev;
1081 tx_ring->dev = &adapter->pdev->dev;
d732a184 1082 tx_ring->count = adapter->tx_desc_count;
5eae00c5
GR		 1083 adapter->tx_rings[i] = tx_ring;
1084
1085 rx_ring = &tx_ring[1];
1086 rx_ring->queue_index = i;
1087 rx_ring->netdev = adapter->netdev;
1088 rx_ring->dev = &adapter->pdev->dev;
d732a184 1089 rx_ring->count = adapter->rx_desc_count;
5eae00c5
GR		 1090 adapter->rx_rings[i] = rx_ring;
1091 }
1092
1093 return 0;
1094
1095err_out:
1096 i40evf_free_queues(adapter);
1097 return -ENOMEM;
1098}
1099
1100/**
1101 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1102 * @adapter: board private structure to initialize
1103 *
1104 * Attempt to configure the interrupts using the best available
1105 * capabilities of the hardware and the kernel.
1106 **/
1107static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1108{
1109 int vector, v_budget;
1110 int pairs = 0;
1111 int err = 0;
1112
1113 if (!adapter->vsi_res) {
1114 err = -EIO;
1115 goto out;
1116 }
cc052927 1117 pairs = adapter->num_active_queues;
5eae00c5
GR		 1118
1119 /* It's easy to be greedy for MSI-X vectors, but it really
1120 * doesn't do us much good if we have a lot more vectors
1121 * than CPU's. So let's be conservative and only ask for
1122 * (roughly) twice the number of vectors as there are CPU's.
1123 */
30a500e2
MW		 1124 v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1125 v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
5eae00c5 1126
5eae00c5
GR		 1127 adapter->msix_entries = kcalloc(v_budget,
1128 sizeof(struct msix_entry), GFP_KERNEL);
1129 if (!adapter->msix_entries) {
1130 err = -ENOMEM;
1131 goto out;
1132 }
1133
1134 for (vector = 0; vector < v_budget; vector++)
1135 adapter->msix_entries[vector].entry = vector;
1136
1137 i40evf_acquire_msix_vectors(adapter, v_budget);
1138
1139out:
1140 adapter->netdev->real_num_tx_queues = pairs;
1141 return err;
1142}
1143
1144/**
1145 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1146 * @adapter: board private structure to initialize
1147 *
1148 * We allocate one q_vector per queue interrupt. If allocation fails we
1149 * return -ENOMEM.
1150 **/
1151static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1152{
1153 int q_idx, num_q_vectors;
1154 struct i40e_q_vector *q_vector;
1155
1156 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1157
1158 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
75a64435 1159 q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL);
5eae00c5
GR		 1160 if (!q_vector)
1161 goto err_out;
1162 q_vector->adapter = adapter;
1163 q_vector->vsi = &adapter->vsi;
1164 q_vector->v_idx = q_idx;
1165 netif_napi_add(adapter->netdev, &q_vector->napi,
75a64435 1166 i40evf_napi_poll, NAPI_POLL_WEIGHT);
5eae00c5
GR		 1167 adapter->q_vector[q_idx] = q_vector;
1168 }
1169
1170 return 0;
1171
1172err_out:
1173 while (q_idx) {
1174 q_idx--;
1175 q_vector = adapter->q_vector[q_idx];
1176 netif_napi_del(&q_vector->napi);
1177 kfree(q_vector);
1178 adapter->q_vector[q_idx] = NULL;
1179 }
1180 return -ENOMEM;
1181}
1182
1183/**
1184 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1185 * @adapter: board private structure to initialize
1186 *
1187 * This function frees the memory allocated to the q_vectors. In addition if
1188 * NAPI is enabled it will delete any references to the NAPI struct prior
1189 * to freeing the q_vector.
1190 **/
1191static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1192{
1193 int q_idx, num_q_vectors;
1194 int napi_vectors;
1195
1196 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
cc052927 1197 napi_vectors = adapter->num_active_queues;
5eae00c5
GR		 1198
1199 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1200 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1201
1202 adapter->q_vector[q_idx] = NULL;
1203 if (q_idx < napi_vectors)
1204 netif_napi_del(&q_vector->napi);
1205 kfree(q_vector);
1206 }
1207}
1208
1209/**
1210 * i40evf_reset_interrupt_capability - Reset MSIX setup
1211 * @adapter: board private structure
1212 *
1213 **/
1214void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1215{
1216 pci_disable_msix(adapter->pdev);
1217 kfree(adapter->msix_entries);
1218 adapter->msix_entries = NULL;
5eae00c5
GR		 1219}
1220
1221/**
1222 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1223 * @adapter: board private structure to initialize
1224 *
1225 **/
1226int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1227{
1228 int err;
1229
1230 err = i40evf_set_interrupt_capability(adapter);
1231 if (err) {
1232 dev_err(&adapter->pdev->dev,
1233 "Unable to setup interrupt capabilities\n");
1234 goto err_set_interrupt;
1235 }
1236
1237 err = i40evf_alloc_q_vectors(adapter);
1238 if (err) {
1239 dev_err(&adapter->pdev->dev,
1240 "Unable to allocate memory for queue vectors\n");
1241 goto err_alloc_q_vectors;
1242 }
1243
1244 err = i40evf_alloc_queues(adapter);
1245 if (err) {
1246 dev_err(&adapter->pdev->dev,
1247 "Unable to allocate memory for queues\n");
1248 goto err_alloc_queues;
1249 }
1250
1251 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
75a64435
MW		 1252 (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1253 adapter->num_active_queues);
5eae00c5
GR		 1254
1255 return 0;
1256err_alloc_queues:
1257 i40evf_free_q_vectors(adapter);
1258err_alloc_q_vectors:
1259 i40evf_reset_interrupt_capability(adapter);
1260err_set_interrupt:
1261 return err;
1262}
1263
1264/**
1265 * i40evf_watchdog_timer - Periodic call-back timer
1266 * @data: pointer to adapter disguised as unsigned long
1267 **/
1268static void i40evf_watchdog_timer(unsigned long data)
1269{
1270 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
75a64435 1271
5eae00c5
GR		 1272 schedule_work(&adapter->watchdog_task);
1273 /* timer will be rescheduled in watchdog task */
1274}
1275
1276/**
1277 * i40evf_watchdog_task - Periodic call-back task
1278 * @work: pointer to work_struct
1279 **/
1280static void i40evf_watchdog_task(struct work_struct *work)
1281{
1282 struct i40evf_adapter *adapter = container_of(work,
75a64435
MW		 1283 struct i40evf_adapter,
1284 watchdog_task);
5eae00c5 1285 struct i40e_hw *hw = &adapter->hw;
fd35886a 1286 uint32_t rstat_val;
5eae00c5 1287
ef8693eb
MW		 1288 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1289 goto restart_watchdog;
1290
1291 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
fd35886a
AS		 1292 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1293 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1294 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1295 (rstat_val == I40E_VFR_COMPLETED)) {
ef8693eb
MW		 1296 /* A chance for redemption! */
1297 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1298 adapter->state = __I40EVF_STARTUP;
1299 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1300 schedule_delayed_work(&adapter->init_task, 10);
1301 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1302 &adapter->crit_section);
1303 /* Don't reschedule the watchdog, since we've restarted
1304 * the init task. When init_task contacts the PF and
1305 * gets everything set up again, it'll restart the
1306 * watchdog for us. Down, boy. Sit. Stay. Woof.
1307 */
1308 return;
1309 }
1310 adapter->aq_pending = 0;
1311 adapter->aq_required = 0;
1312 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5 1313 goto watchdog_done;
ef8693eb 1314 }
5eae00c5 1315
ef8693eb
MW		 1316 if ((adapter->state < __I40EVF_DOWN) ||
1317 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
5eae00c5
GR		 1318 goto watchdog_done;
1319
ef8693eb 1320 /* check for reset */
fd35886a 1321 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
75a64435 1322 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
ef8693eb 1323 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
fd35886a
AS		 1324 (rstat_val != I40E_VFR_VFACTIVE) &&
1325 (rstat_val != I40E_VFR_COMPLETED)) {
5eae00c5 1326 adapter->state = __I40EVF_RESETTING;
ef8693eb 1327 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
249c8b8d 1328 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
5eae00c5 1329 schedule_work(&adapter->reset_task);
ef8693eb
MW		 1330 adapter->aq_pending = 0;
1331 adapter->aq_required = 0;
1332 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 1333 goto watchdog_done;
1334 }
1335
1336 /* Process admin queue tasks. After init, everything gets done
1337 * here so we don't race on the admin queue.
1338 */
0758e7cb
MW		 1339 if (adapter->aq_pending) {
1340 if (!i40evf_asq_done(hw)) {
1341 dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1342 i40evf_send_api_ver(adapter);
1343 }
5eae00c5 1344 goto watchdog_done;
0758e7cb 1345 }
5eae00c5
GR		 1346
1347 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1348 i40evf_map_queues(adapter);
1349 goto watchdog_done;
1350 }
1351
1352 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1353 i40evf_add_ether_addrs(adapter);
1354 goto watchdog_done;
1355 }
1356
1357 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1358 i40evf_add_vlans(adapter);
1359 goto watchdog_done;
1360 }
1361
1362 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1363 i40evf_del_ether_addrs(adapter);
1364 goto watchdog_done;
1365 }
1366
1367 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1368 i40evf_del_vlans(adapter);
1369 goto watchdog_done;
1370 }
1371
1372 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1373 i40evf_disable_queues(adapter);
1374 goto watchdog_done;
1375 }
1376
1377 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1378 i40evf_configure_queues(adapter);
1379 goto watchdog_done;
1380 }
1381
1382 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1383 i40evf_enable_queues(adapter);
1384 goto watchdog_done;
1385 }
1386
1387 if (adapter->state == __I40EVF_RUNNING)
1388 i40evf_request_stats(adapter);
5eae00c5 1389watchdog_done:
4870e176
MW		 1390 if (adapter->state == __I40EVF_RUNNING) {
1391 i40evf_irq_enable_queues(adapter, ~0);
1392 i40evf_fire_sw_int(adapter, 0xFF);
1393 } else {
1394 i40evf_fire_sw_int(adapter, 0x1);
1395 }
1396
ef8693eb
MW		 1397 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1398restart_watchdog:
d3e2edb7
AS		 1399 if (adapter->state == __I40EVF_REMOVE)
1400 return;
5eae00c5
GR		 1401 if (adapter->aq_required)
1402 mod_timer(&adapter->watchdog_timer,
1403 jiffies + msecs_to_jiffies(20));
1404 else
1405 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
5eae00c5
GR		 1406 schedule_work(&adapter->adminq_task);
1407}
1408
5b7af02c 1409/**
3dd5550f 1410 * next_queue - increment to next available tx queue
5b7af02c
MW		 1411 * @adapter: board private structure
1412 * @j: queue counter
1413 *
1414 * Helper function for RSS programming to increment through available
1415 * queus. Returns the next queue value.
1416 **/
96d47704
MW		 1417static int next_queue(struct i40evf_adapter *adapter, int j)
1418{
1419 j += 1;
1420
cc052927 1421 return j >= adapter->num_active_queues ? 0 : j;
96d47704
MW		 1422}
1423
5eae00c5
GR		 1424/**
1425 * i40evf_configure_rss - Prepare for RSS if used
1426 * @adapter: board private structure
1427 **/
1428static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1429{
22f258a1 1430 u32 rss_key[I40E_VFQF_HKEY_MAX_INDEX + 1];
5eae00c5
GR		 1431 struct i40e_hw *hw = &adapter->hw;
1432 u32 lut = 0;
1433 int i, j;
1434 u64 hena;
1435
cc052927
MW		 1436 /* No RSS for single queue. */
1437 if (adapter->num_active_queues == 1) {
1438 wr32(hw, I40E_VFQF_HENA(0), 0);
1439 wr32(hw, I40E_VFQF_HENA(1), 0);
1440 return;
1441 }
5eae00c5 1442
cc052927 1443 /* Hash type is configured by the PF - we just supply the key */
22f258a1 1444 netdev_rss_key_fill(rss_key, sizeof(rss_key));
5eae00c5 1445 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
22f258a1 1446 wr32(hw, I40E_VFQF_HKEY(i), rss_key[i]);
5eae00c5
GR		 1447
1448 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1449 hena = I40E_DEFAULT_RSS_HENA;
1450 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1451 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1452
1453 /* Populate the LUT with max no. of queues in round robin fashion */
cc052927 1454 j = adapter->num_active_queues;
96d47704 1455 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
5b7af02c
MW		 1456 j = next_queue(adapter, j);
1457 lut = j;
1458 j = next_queue(adapter, j);
1459 lut |= j << 8;
1460 j = next_queue(adapter, j);
1461 lut |= j << 16;
1462 j = next_queue(adapter, j);
1463 lut |= j << 24;
96d47704 1464 wr32(hw, I40E_VFQF_HLUT(i), lut);
5eae00c5
GR		 1465 }
1466 i40e_flush(hw);
1467}
1468
ef8693eb
MW		 1469#define I40EVF_RESET_WAIT_MS 100
1470#define I40EVF_RESET_WAIT_COUNT 200
5eae00c5
GR		 1471/**
1472 * i40evf_reset_task - Call-back task to handle hardware reset
1473 * @work: pointer to work_struct
1474 *
1475 * During reset we need to shut down and reinitialize the admin queue
1476 * before we can use it to communicate with the PF again. We also clear
1477 * and reinit the rings because that context is lost as well.
1478 **/
1479static void i40evf_reset_task(struct work_struct *work)
1480{
ef8693eb
MW		 1481 struct i40evf_adapter *adapter = container_of(work,
1482 struct i40evf_adapter,
1483 reset_task);
5eae00c5
GR		 1484 struct i40e_hw *hw = &adapter->hw;
1485 int i = 0, err;
1486 uint32_t rstat_val;
1487
1488 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1489 &adapter->crit_section))
f98a2006 1490 usleep_range(500, 1000);
3526d800
MW		 1491
1492 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1493 dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
1494 i40evf_request_reset(adapter);
1495 }
1496
ef8693eb
MW		 1497 /* poll until we see the reset actually happen */
1498 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1499 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1500 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
fd35886a
AS		 1501 if ((rstat_val != I40E_VFR_VFACTIVE) &&
1502 (rstat_val != I40E_VFR_COMPLETED))
ef8693eb 1503 break;
c88e38cc 1504 msleep(I40EVF_RESET_WAIT_MS);
ef8693eb
MW		 1505 }
1506 if (i == I40EVF_RESET_WAIT_COUNT) {
ef8693eb
MW		 1507 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1508 goto continue_reset; /* act like the reset happened */
1509 }
5eae00c5 1510
ef8693eb
MW		 1511 /* wait until the reset is complete and the PF is responding to us */
1512 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
5eae00c5
GR		 1513 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1514 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
fd35886a
AS		 1515 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1516 (rstat_val == I40E_VFR_COMPLETED))
5eae00c5 1517 break;
c88e38cc 1518 msleep(I40EVF_RESET_WAIT_MS);
5eae00c5 1519 }
ef8693eb 1520 if (i == I40EVF_RESET_WAIT_COUNT) {
6ba36a24
MW		 1521 struct i40evf_mac_filter *f, *ftmp;
1522 struct i40evf_vlan_filter *fv, *fvtmp;
1523
5eae00c5 1524 /* reset never finished */
80e72893 1525 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
ef8693eb
MW		 1526 rstat_val);
1527 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1528
169f4076
MW		 1529 if (netif_running(adapter->netdev)) {
1530 set_bit(__I40E_DOWN, &adapter->vsi.state);
1531 i40evf_down(adapter);
1532 i40evf_free_traffic_irqs(adapter);
1533 i40evf_free_all_tx_resources(adapter);
1534 i40evf_free_all_rx_resources(adapter);
1535 }
6ba36a24
MW		 1536
1537 /* Delete all of the filters, both MAC and VLAN. */
1538 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1539 list) {
1540 list_del(&f->list);
1541 kfree(f);
1542 }
1543 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1544 list) {
1545 list_del(&fv->list);
1546 kfree(fv);
1547 }
1548
ef8693eb
MW		 1549 i40evf_free_misc_irq(adapter);
1550 i40evf_reset_interrupt_capability(adapter);
1551 i40evf_free_queues(adapter);
d31944d6 1552 i40evf_free_q_vectors(adapter);
ef8693eb
MW		 1553 kfree(adapter->vf_res);
1554 i40evf_shutdown_adminq(hw);
1555 adapter->netdev->flags &= ~IFF_UP;
1556 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1557 return; /* Do not attempt to reinit. It's dead, Jim. */
5eae00c5 1558 }
ef8693eb
MW		 1559
1560continue_reset:
1561 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1562
5eae00c5
GR		 1563 i40evf_down(adapter);
1564 adapter->state = __I40EVF_RESETTING;
1565
1566 /* kill and reinit the admin queue */
1567 if (i40evf_shutdown_adminq(hw))
1568 dev_warn(&adapter->pdev->dev,
75a64435
MW		 1569 "%s: Failed to destroy the Admin Queue resources\n",
1570 __func__);
5eae00c5
GR		 1571 err = i40evf_init_adminq(hw);
1572 if (err)
1573 dev_info(&adapter->pdev->dev, "%s: init_adminq failed: %d\n",
75a64435 1574 __func__, err);
5eae00c5
GR		 1575
1576 adapter->aq_pending = 0;
1577 adapter->aq_required = 0;
1578 i40evf_map_queues(adapter);
1579 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1580
1581 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1582
1583 if (netif_running(adapter->netdev)) {
1584 /* allocate transmit descriptors */
1585 err = i40evf_setup_all_tx_resources(adapter);
1586 if (err)
1587 goto reset_err;
1588
1589 /* allocate receive descriptors */
1590 err = i40evf_setup_all_rx_resources(adapter);
1591 if (err)
1592 goto reset_err;
1593
1594 i40evf_configure(adapter);
1595
1596 err = i40evf_up_complete(adapter);
1597 if (err)
1598 goto reset_err;
1599
1600 i40evf_irq_enable(adapter, true);
1601 }
1602 return;
1603reset_err:
80e72893 1604 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
5eae00c5
GR		 1605 i40evf_close(adapter->netdev);
1606}
1607
1608/**
1609 * i40evf_adminq_task - worker thread to clean the admin queue
1610 * @work: pointer to work_struct containing our data
1611 **/
1612static void i40evf_adminq_task(struct work_struct *work)
1613{
1614 struct i40evf_adapter *adapter =
1615 container_of(work, struct i40evf_adapter, adminq_task);
1616 struct i40e_hw *hw = &adapter->hw;
1617 struct i40e_arq_event_info event;
1618 struct i40e_virtchnl_msg *v_msg;
1619 i40e_status ret;
912257e5 1620 u32 val, oldval;
5eae00c5
GR		 1621 u16 pending;
1622
ef8693eb 1623 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
7235448c 1624 goto out;
ef8693eb 1625
1001dc37
MW		 1626 event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1627 event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
249c8b8d 1628 if (!event.msg_buf)
7235448c 1629 goto out;
249c8b8d 1630
5eae00c5
GR		 1631 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1632 do {
1633 ret = i40evf_clean_arq_element(hw, &event, &pending);
8b011ebb 1634 if (ret || !v_msg->v_opcode)
5eae00c5
GR		 1635 break; /* No event to process or error cleaning ARQ */
1636
1637 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1638 v_msg->v_retval, event.msg_buf,
1001dc37 1639 event.msg_len);
75a64435 1640 if (pending != 0)
5eae00c5 1641 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
5eae00c5
GR		 1642 } while (pending);
1643
912257e5
MW		 1644 /* check for error indications */
1645 val = rd32(hw, hw->aq.arq.len);
1646 oldval = val;
1647 if (val & I40E_VF_ARQLEN_ARQVFE_MASK) {
1648 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1649 val &= ~I40E_VF_ARQLEN_ARQVFE_MASK;
1650 }
1651 if (val & I40E_VF_ARQLEN_ARQOVFL_MASK) {
1652 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1653 val &= ~I40E_VF_ARQLEN_ARQOVFL_MASK;
1654 }
1655 if (val & I40E_VF_ARQLEN_ARQCRIT_MASK) {
1656 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1657 val &= ~I40E_VF_ARQLEN_ARQCRIT_MASK;
1658 }
1659 if (oldval != val)
1660 wr32(hw, hw->aq.arq.len, val);
1661
1662 val = rd32(hw, hw->aq.asq.len);
1663 oldval = val;
1664 if (val & I40E_VF_ATQLEN_ATQVFE_MASK) {
1665 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1666 val &= ~I40E_VF_ATQLEN_ATQVFE_MASK;
1667 }
1668 if (val & I40E_VF_ATQLEN_ATQOVFL_MASK) {
1669 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1670 val &= ~I40E_VF_ATQLEN_ATQOVFL_MASK;
1671 }
1672 if (val & I40E_VF_ATQLEN_ATQCRIT_MASK) {
1673 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1674 val &= ~I40E_VF_ATQLEN_ATQCRIT_MASK;
1675 }
1676 if (oldval != val)
1677 wr32(hw, hw->aq.asq.len, val);
1678
7235448c
MW		 1679 kfree(event.msg_buf);
1680out:
5eae00c5
GR		 1681 /* re-enable Admin queue interrupt cause */
1682 i40evf_misc_irq_enable(adapter);
5eae00c5
GR		 1683}
1684
1685/**
1686 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1687 * @adapter: board private structure
1688 *
1689 * Free all transmit software resources
1690 **/
1691static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1692{
1693 int i;
1694
cc052927 1695 for (i = 0; i < adapter->num_active_queues; i++)
5eae00c5
GR		 1696 if (adapter->tx_rings[i]->desc)
1697 i40evf_free_tx_resources(adapter->tx_rings[i]);
5eae00c5
GR		 1698}
1699
1700/**
1701 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1702 * @adapter: board private structure
1703 *
1704 * If this function returns with an error, then it's possible one or
1705 * more of the rings is populated (while the rest are not). It is the
1706 * callers duty to clean those orphaned rings.
1707 *
1708 * Return 0 on success, negative on failure
1709 **/
1710static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1711{
1712 int i, err = 0;
1713
cc052927 1714 for (i = 0; i < adapter->num_active_queues; i++) {
d732a184 1715 adapter->tx_rings[i]->count = adapter->tx_desc_count;
5eae00c5
GR		 1716 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1717 if (!err)
1718 continue;
1719 dev_err(&adapter->pdev->dev,
1720 "%s: Allocation for Tx Queue %u failed\n",
1721 __func__, i);
1722 break;
1723 }
1724
1725 return err;
1726}
1727
1728/**
1729 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1730 * @adapter: board private structure
1731 *
1732 * If this function returns with an error, then it's possible one or
1733 * more of the rings is populated (while the rest are not). It is the
1734 * callers duty to clean those orphaned rings.
1735 *
1736 * Return 0 on success, negative on failure
1737 **/
1738static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1739{
1740 int i, err = 0;
1741
cc052927 1742 for (i = 0; i < adapter->num_active_queues; i++) {
d732a184 1743 adapter->rx_rings[i]->count = adapter->rx_desc_count;
5eae00c5
GR		 1744 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1745 if (!err)
1746 continue;
1747 dev_err(&adapter->pdev->dev,
1748 "%s: Allocation for Rx Queue %u failed\n",
1749 __func__, i);
1750 break;
1751 }
1752 return err;
1753}
1754
1755/**
1756 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1757 * @adapter: board private structure
1758 *
1759 * Free all receive software resources
1760 **/
1761static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1762{
1763 int i;
1764
cc052927 1765 for (i = 0; i < adapter->num_active_queues; i++)
5eae00c5
GR		 1766 if (adapter->rx_rings[i]->desc)
1767 i40evf_free_rx_resources(adapter->rx_rings[i]);
1768}
1769
1770/**
1771 * i40evf_open - Called when a network interface is made active
1772 * @netdev: network interface device structure
1773 *
1774 * Returns 0 on success, negative value on failure
1775 *
1776 * The open entry point is called when a network interface is made
1777 * active by the system (IFF_UP). At this point all resources needed
1778 * for transmit and receive operations are allocated, the interrupt
1779 * handler is registered with the OS, the watchdog timer is started,
1780 * and the stack is notified that the interface is ready.
1781 **/
1782static int i40evf_open(struct net_device *netdev)
1783{
1784 struct i40evf_adapter *adapter = netdev_priv(netdev);
1785 int err;
1786
ef8693eb
MW		 1787 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1788 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1789 return -EIO;
1790 }
5eae00c5
GR		 1791 if (adapter->state != __I40EVF_DOWN)
1792 return -EBUSY;
1793
1794 /* allocate transmit descriptors */
1795 err = i40evf_setup_all_tx_resources(adapter);
1796 if (err)
1797 goto err_setup_tx;
1798
1799 /* allocate receive descriptors */
1800 err = i40evf_setup_all_rx_resources(adapter);
1801 if (err)
1802 goto err_setup_rx;
1803
1804 /* clear any pending interrupts, may auto mask */
1805 err = i40evf_request_traffic_irqs(adapter, netdev->name);
1806 if (err)
1807 goto err_req_irq;
1808
1809 i40evf_configure(adapter);
1810
1811 err = i40evf_up_complete(adapter);
1812 if (err)
1813 goto err_req_irq;
1814
1815 i40evf_irq_enable(adapter, true);
1816
1817 return 0;
1818
1819err_req_irq:
1820 i40evf_down(adapter);
1821 i40evf_free_traffic_irqs(adapter);
1822err_setup_rx:
1823 i40evf_free_all_rx_resources(adapter);
1824err_setup_tx:
1825 i40evf_free_all_tx_resources(adapter);
1826
1827 return err;
1828}
1829
1830/**
1831 * i40evf_close - Disables a network interface
1832 * @netdev: network interface device structure
1833 *
1834 * Returns 0, this is not allowed to fail
1835 *
1836 * The close entry point is called when an interface is de-activated
1837 * by the OS. The hardware is still under the drivers control, but
1838 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1839 * are freed, along with all transmit and receive resources.
1840 **/
1841static int i40evf_close(struct net_device *netdev)
1842{
1843 struct i40evf_adapter *adapter = netdev_priv(netdev);
1844
ef8693eb
MW		 1845 if (adapter->state <= __I40EVF_DOWN)
1846 return 0;
1847
ef8693eb 1848
5eae00c5
GR		 1849 set_bit(__I40E_DOWN, &adapter->vsi.state);
1850
1851 i40evf_down(adapter);
ddf0b3a6 1852 adapter->state = __I40EVF_DOWN;
5eae00c5
GR		 1853 i40evf_free_traffic_irqs(adapter);
1854
1855 i40evf_free_all_tx_resources(adapter);
1856 i40evf_free_all_rx_resources(adapter);
1857
1858 return 0;
1859}
1860
1861/**
1862 * i40evf_get_stats - Get System Network Statistics
1863 * @netdev: network interface device structure
1864 *
1865 * Returns the address of the device statistics structure.
1866 * The statistics are actually updated from the timer callback.
1867 **/
1868static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1869{
1870 struct i40evf_adapter *adapter = netdev_priv(netdev);
1871
1872 /* only return the current stats */
1873 return &adapter->net_stats;
1874}
1875
1876/**
1877 * i40evf_reinit_locked - Software reinit
1878 * @adapter: board private structure
1879 *
1880 * Reinititalizes the ring structures in response to a software configuration
1881 * change. Roughly the same as close followed by open, but skips releasing
1882 * and reallocating the interrupts.
1883 **/
1884void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1885{
1886 struct net_device *netdev = adapter->netdev;
1887 int err;
1888
1889 WARN_ON(in_interrupt());
1890
5eae00c5
GR		 1891 i40evf_down(adapter);
1892
1893 /* allocate transmit descriptors */
1894 err = i40evf_setup_all_tx_resources(adapter);
1895 if (err)
1896 goto err_reinit;
1897
1898 /* allocate receive descriptors */
1899 err = i40evf_setup_all_rx_resources(adapter);
1900 if (err)
1901 goto err_reinit;
1902
1903 i40evf_configure(adapter);
1904
1905 err = i40evf_up_complete(adapter);
1906 if (err)
1907 goto err_reinit;
1908
1909 i40evf_irq_enable(adapter, true);
1910 return;
1911
1912err_reinit:
80e72893 1913 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
5eae00c5
GR		 1914 i40evf_close(netdev);
1915}
1916
1917/**
1918 * i40evf_change_mtu - Change the Maximum Transfer Unit
1919 * @netdev: network interface device structure
1920 * @new_mtu: new value for maximum frame size
1921 *
1922 * Returns 0 on success, negative on failure
1923 **/
1924static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1925{
1926 struct i40evf_adapter *adapter = netdev_priv(netdev);
1927 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1928
1929 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1930 return -EINVAL;
1931
1932 /* must set new MTU before calling down or up */
1933 netdev->mtu = new_mtu;
1934 i40evf_reinit_locked(adapter);
1935 return 0;
1936}
1937
1938static const struct net_device_ops i40evf_netdev_ops = {
1939 .ndo_open = i40evf_open,
1940 .ndo_stop = i40evf_close,
1941 .ndo_start_xmit = i40evf_xmit_frame,
1942 .ndo_get_stats = i40evf_get_stats,
1943 .ndo_set_rx_mode = i40evf_set_rx_mode,
1944 .ndo_validate_addr = eth_validate_addr,
1945 .ndo_set_mac_address = i40evf_set_mac,
1946 .ndo_change_mtu = i40evf_change_mtu,
1947 .ndo_tx_timeout = i40evf_tx_timeout,
1948 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
1949 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
1950};
1951
1952/**
1953 * i40evf_check_reset_complete - check that VF reset is complete
1954 * @hw: pointer to hw struct
1955 *
1956 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1957 **/
1958static int i40evf_check_reset_complete(struct i40e_hw *hw)
1959{
1960 u32 rstat;
1961 int i;
1962
1963 for (i = 0; i < 100; i++) {
fd35886a
AS		 1964 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
1965 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1966 if ((rstat == I40E_VFR_VFACTIVE) ||
1967 (rstat == I40E_VFR_COMPLETED))
5eae00c5 1968 return 0;
f98a2006 1969 usleep_range(10, 20);
5eae00c5
GR		 1970 }
1971 return -EBUSY;
1972}
1973
1974/**
1975 * i40evf_init_task - worker thread to perform delayed initialization
1976 * @work: pointer to work_struct containing our data
1977 *
1978 * This task completes the work that was begun in probe. Due to the nature
1979 * of VF-PF communications, we may need to wait tens of milliseconds to get
1980 * reponses back from the PF. Rather than busy-wait in probe and bog down the
1981 * whole system, we'll do it in a task so we can sleep.
1982 * This task only runs during driver init. Once we've established
1983 * communications with the PF driver and set up our netdev, the watchdog
1984 * takes over.
1985 **/
1986static void i40evf_init_task(struct work_struct *work)
1987{
1988 struct i40evf_adapter *adapter = container_of(work,
1989 struct i40evf_adapter,
1990 init_task.work);
1991 struct net_device *netdev = adapter->netdev;
1992 struct i40evf_mac_filter *f;
1993 struct i40e_hw *hw = &adapter->hw;
1994 struct pci_dev *pdev = adapter->pdev;
1995 int i, err, bufsz;
1996
1997 switch (adapter->state) {
1998 case __I40EVF_STARTUP:
1999 /* driver loaded, probe complete */
ef8693eb
MW		 2000 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2001 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
5eae00c5
GR		 2002 err = i40e_set_mac_type(hw);
2003 if (err) {
c2a137cb
MW		 2004 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2005 err);
5eae00c5
GR		 2006 goto err;
2007 }
2008 err = i40evf_check_reset_complete(hw);
2009 if (err) {
0d9c7ea8 2010 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
75a64435 2011 err);
5eae00c5
GR		 2012 goto err;
2013 }
2014 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2015 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2016 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2017 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2018
2019 err = i40evf_init_adminq(hw);
2020 if (err) {
c2a137cb
MW		 2021 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2022 err);
5eae00c5
GR		 2023 goto err;
2024 }
2025 err = i40evf_send_api_ver(adapter);
2026 if (err) {
10bdd67b 2027 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
5eae00c5
GR		 2028 i40evf_shutdown_adminq(hw);
2029 goto err;
2030 }
2031 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2032 goto restart;
5eae00c5 2033 case __I40EVF_INIT_VERSION_CHECK:
10bdd67b 2034 if (!i40evf_asq_done(hw)) {
80e72893 2035 dev_err(&pdev->dev, "Admin queue command never completed\n");
906a6937
MW		 2036 i40evf_shutdown_adminq(hw);
2037 adapter->state = __I40EVF_STARTUP;
5eae00c5 2038 goto err;
10bdd67b 2039 }
5eae00c5
GR		 2040
2041 /* aq msg sent, awaiting reply */
2042 err = i40evf_verify_api_ver(adapter);
2043 if (err) {
d4f82fd3 2044 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
56f9920a 2045 err = i40evf_send_api_ver(adapter);
5eae00c5
GR		 2046 goto err;
2047 }
2048 err = i40evf_send_vf_config_msg(adapter);
2049 if (err) {
3f2ab172 2050 dev_err(&pdev->dev, "Unable to send config request (%d)\n",
5eae00c5
GR		 2051 err);
2052 goto err;
2053 }
2054 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2055 goto restart;
5eae00c5
GR		 2056 case __I40EVF_INIT_GET_RESOURCES:
2057 /* aq msg sent, awaiting reply */
2058 if (!adapter->vf_res) {
2059 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2060 (I40E_MAX_VF_VSI *
2061 sizeof(struct i40e_virtchnl_vsi_resource));
2062 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
c2a137cb 2063 if (!adapter->vf_res)
5eae00c5 2064 goto err;
5eae00c5
GR		 2065 }
2066 err = i40evf_get_vf_config(adapter);
906a6937 2067 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
906a6937
MW		 2068 err = i40evf_send_vf_config_msg(adapter);
2069 goto err;
2070 }
5eae00c5 2071 if (err) {
c2a137cb
MW		 2072 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2073 err);
5eae00c5
GR		 2074 goto err_alloc;
2075 }
2076 adapter->state = __I40EVF_INIT_SW;
2077 break;
2078 default:
2079 goto err_alloc;
2080 }
2081 /* got VF config message back from PF, now we can parse it */
2082 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2083 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2084 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2085 }
2086 if (!adapter->vsi_res) {
c2a137cb 2087 dev_err(&pdev->dev, "No LAN VSI found\n");
5eae00c5
GR		 2088 goto err_alloc;
2089 }
2090
2091 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2092
5eae00c5
GR		 2093 netdev->netdev_ops = &i40evf_netdev_ops;
2094 i40evf_set_ethtool_ops(netdev);
2095 netdev->watchdog_timeo = 5 * HZ;
dbbd8111
MW		 2096 netdev->features |= NETIF_F_HIGHDMA |
2097 NETIF_F_SG |
5eae00c5
GR		 2098 NETIF_F_IP_CSUM |
2099 NETIF_F_SCTP_CSUM |
2100 NETIF_F_IPV6_CSUM |
2101 NETIF_F_TSO |
2102 NETIF_F_TSO6 |
3415e8ce 2103 NETIF_F_RXCSUM |
5eae00c5
GR		 2104 NETIF_F_GRO;
2105
2106 if (adapter->vf_res->vf_offload_flags
2107 & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2108 netdev->vlan_features = netdev->features;
2109 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2110 NETIF_F_HW_VLAN_CTAG_RX |
2111 NETIF_F_HW_VLAN_CTAG_FILTER;
2112 }
2113
3415e8ce
GR		 2114 /* copy netdev features into list of user selectable features */
2115 netdev->hw_features |= netdev->features;
2116 netdev->hw_features &= ~NETIF_F_RXCSUM;
2117
5eae00c5 2118 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
b34f90e7 2119 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
c2a137cb 2120 adapter->hw.mac.addr);
5eae00c5
GR		 2121 random_ether_addr(adapter->hw.mac.addr);
2122 }
9a173901
GR		 2123 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2124 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
5eae00c5 2125
5eae00c5 2126 f = kzalloc(sizeof(*f), GFP_ATOMIC);
348d4994 2127 if (!f)
5eae00c5
GR		 2128 goto err_sw_init;
2129
9a173901 2130 ether_addr_copy(f->macaddr, adapter->hw.mac.addr);
5eae00c5
GR		 2131 f->add = true;
2132 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2133
2134 list_add(&f->list, &adapter->mac_filter_list);
2135
2136 init_timer(&adapter->watchdog_timer);
2137 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2138 adapter->watchdog_timer.data = (unsigned long)adapter;
2139 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2140
cc052927
MW		 2141 adapter->num_active_queues = min_t(int,
2142 adapter->vsi_res->num_queue_pairs,
2143 (int)(num_online_cpus()));
d732a184
MW		 2144 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2145 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
5eae00c5
GR		 2146 err = i40evf_init_interrupt_scheme(adapter);
2147 if (err)
2148 goto err_sw_init;
2149 i40evf_map_rings_to_vectors(adapter);
2150 i40evf_configure_rss(adapter);
2151 err = i40evf_request_misc_irq(adapter);
2152 if (err)
2153 goto err_sw_init;
2154
2155 netif_carrier_off(netdev);
2156
5eae00c5
GR		 2157 adapter->vsi.id = adapter->vsi_res->vsi_id;
2158 adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2159 adapter->vsi.back = adapter;
2160 adapter->vsi.base_vector = 1;
2161 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
ca99eb99
MW		 2162 adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2163 ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2164 adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2165 ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
5eae00c5
GR		 2166 adapter->vsi.netdev = adapter->netdev;
2167
ef8693eb
MW		 2168 if (!adapter->netdev_registered) {
2169 err = register_netdev(netdev);
2170 if (err)
2171 goto err_register;
2172 }
5eae00c5
GR		 2173
2174 adapter->netdev_registered = true;
2175
2176 netif_tx_stop_all_queues(netdev);
2177
b34f90e7 2178 dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
5eae00c5
GR		 2179 if (netdev->features & NETIF_F_GRO)
2180 dev_info(&pdev->dev, "GRO is enabled\n");
2181
2182 dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2183 adapter->state = __I40EVF_DOWN;
2184 set_bit(__I40E_DOWN, &adapter->vsi.state);
2185 i40evf_misc_irq_enable(adapter);
2186 return;
2187restart:
2188 schedule_delayed_work(&adapter->init_task,
2189 msecs_to_jiffies(50));
2190 return;
2191
2192err_register:
2193 i40evf_free_misc_irq(adapter);
2194err_sw_init:
2195 i40evf_reset_interrupt_capability(adapter);
5eae00c5
GR		 2196err_alloc:
2197 kfree(adapter->vf_res);
2198 adapter->vf_res = NULL;
2199err:
2200 /* Things went into the weeds, so try again later */
2201 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
80e72893 2202 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
ef8693eb 2203 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
5eae00c5
GR		 2204 return; /* do not reschedule */
2205 }
2206 schedule_delayed_work(&adapter->init_task, HZ * 3);
5eae00c5
GR		 2207}
2208
2209/**
2210 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2211 * @pdev: pci device structure
2212 **/
2213static void i40evf_shutdown(struct pci_dev *pdev)
2214{
2215 struct net_device *netdev = pci_get_drvdata(pdev);
2216
2217 netif_device_detach(netdev);
2218
2219 if (netif_running(netdev))
2220 i40evf_close(netdev);
2221
2222#ifdef CONFIG_PM
2223 pci_save_state(pdev);
2224
2225#endif
2226 pci_disable_device(pdev);
2227}
2228
2229/**
2230 * i40evf_probe - Device Initialization Routine
2231 * @pdev: PCI device information struct
2232 * @ent: entry in i40evf_pci_tbl
2233 *
2234 * Returns 0 on success, negative on failure
2235 *
2236 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2237 * The OS initialization, configuring of the adapter private structure,
2238 * and a hardware reset occur.
2239 **/
2240static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2241{
2242 struct net_device *netdev;
2243 struct i40evf_adapter *adapter = NULL;
2244 struct i40e_hw *hw = NULL;
dbbd8111 2245 int err;
5eae00c5
GR		 2246
2247 err = pci_enable_device(pdev);
2248 if (err)
2249 return err;
2250
6494294f 2251 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
6494294f 2252 if (err) {
e3e3bfdd
JS		 2253 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2254 if (err) {
2255 dev_err(&pdev->dev,
2256 "DMA configuration failed: 0x%x\n", err);
2257 goto err_dma;
2258 }
5eae00c5
GR		 2259 }
2260
2261 err = pci_request_regions(pdev, i40evf_driver_name);
2262 if (err) {
2263 dev_err(&pdev->dev,
2264 "pci_request_regions failed 0x%x\n", err);
2265 goto err_pci_reg;
2266 }
2267
2268 pci_enable_pcie_error_reporting(pdev);
2269
2270 pci_set_master(pdev);
2271
2272 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2273 MAX_TX_QUEUES);
2274 if (!netdev) {
2275 err = -ENOMEM;
2276 goto err_alloc_etherdev;
2277 }
2278
2279 SET_NETDEV_DEV(netdev, &pdev->dev);
2280
2281 pci_set_drvdata(pdev, netdev);
2282 adapter = netdev_priv(netdev);
5eae00c5
GR		 2283
2284 adapter->netdev = netdev;
2285 adapter->pdev = pdev;
2286
2287 hw = &adapter->hw;
2288 hw->back = adapter;
2289
2290 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2291 adapter->state = __I40EVF_STARTUP;
2292
2293 /* Call save state here because it relies on the adapter struct. */
2294 pci_save_state(pdev);
2295
2296 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2297 pci_resource_len(pdev, 0));
2298 if (!hw->hw_addr) {
2299 err = -EIO;
2300 goto err_ioremap;
2301 }
2302 hw->vendor_id = pdev->vendor;
2303 hw->device_id = pdev->device;
2304 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2305 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2306 hw->subsystem_device_id = pdev->subsystem_device;
2307 hw->bus.device = PCI_SLOT(pdev->devfn);
2308 hw->bus.func = PCI_FUNC(pdev->devfn);
2309
8bb1a540
SK		 2310 INIT_LIST_HEAD(&adapter->mac_filter_list);
2311 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2312
5eae00c5
GR		 2313 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2314 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2315 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2316 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2317 schedule_delayed_work(&adapter->init_task, 10);
2318
2319 return 0;
2320
2321err_ioremap:
2322 free_netdev(netdev);
2323err_alloc_etherdev:
2324 pci_release_regions(pdev);
2325err_pci_reg:
2326err_dma:
2327 pci_disable_device(pdev);
2328 return err;
2329}
2330
2331#ifdef CONFIG_PM
2332/**
2333 * i40evf_suspend - Power management suspend routine
2334 * @pdev: PCI device information struct
2335 * @state: unused
2336 *
2337 * Called when the system (VM) is entering sleep/suspend.
2338 **/
2339static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2340{
2341 struct net_device *netdev = pci_get_drvdata(pdev);
2342 struct i40evf_adapter *adapter = netdev_priv(netdev);
2343 int retval = 0;
2344
2345 netif_device_detach(netdev);
2346
2347 if (netif_running(netdev)) {
2348 rtnl_lock();
2349 i40evf_down(adapter);
2350 rtnl_unlock();
2351 }
2352 i40evf_free_misc_irq(adapter);
2353 i40evf_reset_interrupt_capability(adapter);
2354
2355 retval = pci_save_state(pdev);
2356 if (retval)
2357 return retval;
2358
2359 pci_disable_device(pdev);
2360
2361 return 0;
2362}
2363
2364/**
2365 * i40evf_resume - Power managment resume routine
2366 * @pdev: PCI device information struct
2367 *
2368 * Called when the system (VM) is resumed from sleep/suspend.
2369 **/
2370static int i40evf_resume(struct pci_dev *pdev)
2371{
2372 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2373 struct net_device *netdev = adapter->netdev;
2374 u32 err;
2375
2376 pci_set_power_state(pdev, PCI_D0);
2377 pci_restore_state(pdev);
2378 /* pci_restore_state clears dev->state_saved so call
2379 * pci_save_state to restore it.
2380 */
2381 pci_save_state(pdev);
2382
2383 err = pci_enable_device_mem(pdev);
2384 if (err) {
2385 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2386 return err;
2387 }
2388 pci_set_master(pdev);
2389
2390 rtnl_lock();
2391 err = i40evf_set_interrupt_capability(adapter);
2392 if (err) {
2393 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2394 return err;
2395 }
2396 err = i40evf_request_misc_irq(adapter);
2397 rtnl_unlock();
2398 if (err) {
2399 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2400 return err;
2401 }
2402
2403 schedule_work(&adapter->reset_task);
2404
2405 netif_device_attach(netdev);
2406
2407 return err;
2408}
2409
2410#endif /* CONFIG_PM */
2411/**
2412 * i40evf_remove - Device Removal Routine
2413 * @pdev: PCI device information struct
2414 *
2415 * i40evf_remove is called by the PCI subsystem to alert the driver
2416 * that it should release a PCI device. The could be caused by a
2417 * Hot-Plug event, or because the driver is going to be removed from
2418 * memory.
2419 **/
2420static void i40evf_remove(struct pci_dev *pdev)
2421{
2422 struct net_device *netdev = pci_get_drvdata(pdev);
2423 struct i40evf_adapter *adapter = netdev_priv(netdev);
6ba36a24 2424 struct i40evf_mac_filter *f, *ftmp;
5eae00c5
GR		 2425 struct i40e_hw *hw = &adapter->hw;
2426
2427 cancel_delayed_work_sync(&adapter->init_task);
ef8693eb 2428 cancel_work_sync(&adapter->reset_task);
5eae00c5
GR		 2429
2430 if (adapter->netdev_registered) {
2431 unregister_netdev(netdev);
2432 adapter->netdev_registered = false;
2433 }
53d0b3ae 2434
f4a71881 2435 /* Shut down all the garbage mashers on the detention level */
5eae00c5 2436 adapter->state = __I40EVF_REMOVE;
f4a71881
MW		 2437 adapter->aq_required = 0;
2438 adapter->aq_pending = 0;
2439 i40evf_request_reset(adapter);
2440 msleep(20);
2441 /* If the FW isn't responding, kick it once, but only once. */
2442 if (!i40evf_asq_done(hw)) {
2443 i40evf_request_reset(adapter);
2444 msleep(20);
2445 }
5eae00c5 2446
dbb01c8a 2447 if (adapter->msix_entries) {
5eae00c5 2448 i40evf_misc_irq_disable(adapter);
5eae00c5 2449 i40evf_free_misc_irq(adapter);
5eae00c5 2450 i40evf_reset_interrupt_capability(adapter);
d31944d6 2451 i40evf_free_q_vectors(adapter);
5eae00c5
GR		 2452 }
2453
e5d17c3e
MW		 2454 if (adapter->watchdog_timer.function)
2455 del_timer_sync(&adapter->watchdog_timer);
2456
dbb01c8a
MW		 2457 flush_scheduled_work();
2458
5eae00c5
GR		 2459 if (hw->aq.asq.count)
2460 i40evf_shutdown_adminq(hw);
2461
2462 iounmap(hw->hw_addr);
2463 pci_release_regions(pdev);
2464
2465 i40evf_free_queues(adapter);
2466 kfree(adapter->vf_res);
6ba36a24
MW		 2467 /* If we got removed before an up/down sequence, we've got a filter
2468 * hanging out there that we need to get rid of.
2469 */
2470 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2471 list_del(&f->list);
2472 kfree(f);
2473 }
37dfdf37
MW		 2474 list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2475 list_del(&f->list);
2476 kfree(f);
2477 }
5eae00c5
GR		 2478
2479 free_netdev(netdev);
2480
2481 pci_disable_pcie_error_reporting(pdev);
2482
2483 pci_disable_device(pdev);
2484}
2485
2486static struct pci_driver i40evf_driver = {
2487 .name = i40evf_driver_name,
2488 .id_table = i40evf_pci_tbl,
2489 .probe = i40evf_probe,
2490 .remove = i40evf_remove,
2491#ifdef CONFIG_PM
2492 .suspend = i40evf_suspend,
2493 .resume = i40evf_resume,
2494#endif
2495 .shutdown = i40evf_shutdown,
2496};
2497
2498/**
2499 * i40e_init_module - Driver Registration Routine
2500 *
2501 * i40e_init_module is the first routine called when the driver is
2502 * loaded. All it does is register with the PCI subsystem.
2503 **/
2504static int __init i40evf_init_module(void)
2505{
2506 int ret;
75a64435 2507
5eae00c5 2508 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
75a64435 2509 i40evf_driver_version);
5eae00c5
GR		 2510
2511 pr_info("%s\n", i40evf_copyright);
2512
2513 ret = pci_register_driver(&i40evf_driver);
2514 return ret;
2515}
2516
2517module_init(i40evf_init_module);
2518
2519/**
2520 * i40e_exit_module - Driver Exit Cleanup Routine
2521 *
2522 * i40e_exit_module is called just before the driver is removed
2523 * from memory.
2524 **/
2525static void __exit i40evf_exit_module(void)
2526{
2527 pci_unregister_driver(&i40evf_driver);
2528}
2529
2530module_exit(i40evf_exit_module);
2531
2532/* i40evf_main.c */
Linux kernel - Deliverables
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