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[deliverable/linux.git] / drivers / net / ethernet / intel / i40evf / i40evf_main.c
1 /*******************************************************************************
2 *
3 * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
4 * Copyright(c) 2013 - 2015 Intel Corporation.
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 *
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 *
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"
29 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter);
30 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter);
31 static int i40evf_close(struct net_device *netdev);
32
33 char i40evf_driver_name[] = "i40evf";
34 static const char i40evf_driver_string[] =
35 "Intel(R) XL710/X710 Virtual Function Network Driver";
36
37 #define DRV_VERSION "1.3.33"
38 const char i40evf_driver_version[] = DRV_VERSION;
39 static const char i40evf_copyright[] =
40 "Copyright (c) 2013 - 2015 Intel Corporation.";
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 */
50 static const struct pci_device_id i40evf_pci_tbl[] = {
51 {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
52 {PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF), 0},
53 /* required last entry */
54 {0, }
55 };
56
57 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
58
59 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
60 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
61 MODULE_LICENSE("GPL");
62 MODULE_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 **/
71 i40e_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 **/
94 i40e_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 **/
111 i40e_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 **/
131 i40e_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 **/
149 void 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 **/
169 static void i40evf_tx_timeout(struct net_device *netdev)
170 {
171 struct i40evf_adapter *adapter = netdev_priv(netdev);
172
173 adapter->tx_timeout_count++;
174 if (!(adapter->flags & (I40EVF_FLAG_RESET_PENDING |
175 I40EVF_FLAG_RESET_NEEDED))) {
176 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
177 schedule_work(&adapter->reset_task);
178 }
179 }
180
181 /**
182 * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
183 * @adapter: board private structure
184 **/
185 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
186 {
187 struct i40e_hw *hw = &adapter->hw;
188
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 **/
201 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
202 {
203 struct i40e_hw *hw = &adapter->hw;
204
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_ENA1_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 **/
217 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
218 {
219 int i;
220 struct i40e_hw *hw = &adapter->hw;
221
222 if (!adapter->msix_entries)
223 return;
224
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);
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 **/
238 void 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 & BIT(i - 1)) {
245 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
246 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
247 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
248 I40E_VFINT_DYN_CTLN1_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 **/
258 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
259 {
260 struct i40e_hw *hw = &adapter->hw;
261 int i;
262 uint32_t dyn_ctl;
263
264 if (mask & 1) {
265 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
266 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
267 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
268 I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
269 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
270 }
271 for (i = 1; i < adapter->num_msix_vectors; i++) {
272 if (mask & BIT(i)) {
273 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
274 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
275 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
276 I40E_VFINT_DYN_CTLN1_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 * @flush: boolean value whether to run rd32()
286 **/
287 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
288 {
289 struct i40e_hw *hw = &adapter->hw;
290
291 i40evf_misc_irq_enable(adapter);
292 i40evf_irq_enable_queues(adapter, ~0);
293
294 if (flush)
295 rd32(hw, I40E_VFGEN_RSTAT);
296 }
297
298 /**
299 * i40evf_msix_aq - Interrupt handler for vector 0
300 * @irq: interrupt number
301 * @data: pointer to netdev
302 **/
303 static irqreturn_t i40evf_msix_aq(int irq, void *data)
304 {
305 struct net_device *netdev = data;
306 struct i40evf_adapter *adapter = netdev_priv(netdev);
307 struct i40e_hw *hw = &adapter->hw;
308 u32 val;
309
310 /* handle non-queue interrupts, these reads clear the registers */
311 val = rd32(hw, I40E_VFINT_ICR01);
312 val = rd32(hw, I40E_VFINT_ICR0_ENA1);
313
314 val = rd32(hw, I40E_VFINT_DYN_CTL01) |
315 I40E_VFINT_DYN_CTL01_CLEARPBA_MASK;
316 wr32(hw, I40E_VFINT_DYN_CTL01, val);
317
318 /* schedule work on the private workqueue */
319 schedule_work(&adapter->adminq_task);
320
321 return IRQ_HANDLED;
322 }
323
324 /**
325 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
326 * @irq: interrupt number
327 * @data: pointer to a q_vector
328 **/
329 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
330 {
331 struct i40e_q_vector *q_vector = data;
332
333 if (!q_vector->tx.ring && !q_vector->rx.ring)
334 return IRQ_HANDLED;
335
336 napi_schedule_irqoff(&q_vector->napi);
337
338 return IRQ_HANDLED;
339 }
340
341 /**
342 * i40evf_map_vector_to_rxq - associate irqs with rx queues
343 * @adapter: board private structure
344 * @v_idx: interrupt number
345 * @r_idx: queue number
346 **/
347 static void
348 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
349 {
350 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
351 struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
352
353 rx_ring->q_vector = q_vector;
354 rx_ring->next = q_vector->rx.ring;
355 rx_ring->vsi = &adapter->vsi;
356 q_vector->rx.ring = rx_ring;
357 q_vector->rx.count++;
358 q_vector->rx.latency_range = I40E_LOW_LATENCY;
359 q_vector->itr_countdown = ITR_COUNTDOWN_START;
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 **/
368 static void
369 i40evf_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->itr_countdown = ITR_COUNTDOWN_START;
381 q_vector->num_ringpairs++;
382 q_vector->ring_mask |= BIT(t_idx);
383 }
384
385 /**
386 * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
387 * @adapter: board private structure to initialize
388 *
389 * This function maps descriptor rings to the queue-specific vectors
390 * we were allotted through the MSI-X enabling code. Ideally, we'd have
391 * one vector per ring/queue, but on a constrained vector budget, we
392 * group the rings as "efficiently" as possible. You would add new
393 * mapping configurations in here.
394 **/
395 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
396 {
397 int q_vectors;
398 int v_start = 0;
399 int rxr_idx = 0, txr_idx = 0;
400 int rxr_remaining = adapter->num_active_queues;
401 int txr_remaining = adapter->num_active_queues;
402 int i, j;
403 int rqpv, tqpv;
404 int err = 0;
405
406 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
407
408 /* The ideal configuration...
409 * We have enough vectors to map one per queue.
410 */
411 if (q_vectors >= (rxr_remaining * 2)) {
412 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
413 i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
414
415 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
416 i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
417 goto out;
418 }
419
420 /* If we don't have enough vectors for a 1-to-1
421 * mapping, we'll have to group them so there are
422 * multiple queues per vector.
423 * Re-adjusting *qpv takes care of the remainder.
424 */
425 for (i = v_start; i < q_vectors; i++) {
426 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
427 for (j = 0; j < rqpv; j++) {
428 i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
429 rxr_idx++;
430 rxr_remaining--;
431 }
432 }
433 for (i = v_start; i < q_vectors; i++) {
434 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
435 for (j = 0; j < tqpv; j++) {
436 i40evf_map_vector_to_txq(adapter, i, txr_idx);
437 txr_idx++;
438 txr_remaining--;
439 }
440 }
441
442 out:
443 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
444
445 return err;
446 }
447
448 #ifdef CONFIG_NET_POLL_CONTROLLER
449 /**
450 * i40evf_netpoll - A Polling 'interrupt' handler
451 * @netdev: network interface device structure
452 *
453 * This is used by netconsole to send skbs without having to re-enable
454 * interrupts. It's not called while the normal interrupt routine is executing.
455 **/
456 static void i40evf_netpoll(struct net_device *netdev)
457 {
458 struct i40evf_adapter *adapter = netdev_priv(netdev);
459 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
460 int i;
461
462 /* if interface is down do nothing */
463 if (test_bit(__I40E_DOWN, &adapter->vsi.state))
464 return;
465
466 for (i = 0; i < q_vectors; i++)
467 i40evf_msix_clean_rings(0, adapter->q_vector[i]);
468 }
469
470 #endif
471 /**
472 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
473 * @adapter: board private structure
474 *
475 * Allocates MSI-X vectors for tx and rx handling, and requests
476 * interrupts from the kernel.
477 **/
478 static int
479 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
480 {
481 int vector, err, q_vectors;
482 int rx_int_idx = 0, tx_int_idx = 0;
483
484 i40evf_irq_disable(adapter);
485 /* Decrement for Other and TCP Timer vectors */
486 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
487
488 for (vector = 0; vector < q_vectors; vector++) {
489 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
490
491 if (q_vector->tx.ring && q_vector->rx.ring) {
492 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
493 "i40evf-%s-%s-%d", basename,
494 "TxRx", rx_int_idx++);
495 tx_int_idx++;
496 } else if (q_vector->rx.ring) {
497 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
498 "i40evf-%s-%s-%d", basename,
499 "rx", rx_int_idx++);
500 } else if (q_vector->tx.ring) {
501 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
502 "i40evf-%s-%s-%d", basename,
503 "tx", tx_int_idx++);
504 } else {
505 /* skip this unused q_vector */
506 continue;
507 }
508 err = request_irq(
509 adapter->msix_entries[vector + NONQ_VECS].vector,
510 i40evf_msix_clean_rings,
511 0,
512 q_vector->name,
513 q_vector);
514 if (err) {
515 dev_info(&adapter->pdev->dev,
516 "Request_irq failed, error: %d\n", err);
517 goto free_queue_irqs;
518 }
519 /* assign the mask for this irq */
520 irq_set_affinity_hint(
521 adapter->msix_entries[vector + NONQ_VECS].vector,
522 q_vector->affinity_mask);
523 }
524
525 return 0;
526
527 free_queue_irqs:
528 while (vector) {
529 vector--;
530 irq_set_affinity_hint(
531 adapter->msix_entries[vector + NONQ_VECS].vector,
532 NULL);
533 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
534 adapter->q_vector[vector]);
535 }
536 return err;
537 }
538
539 /**
540 * i40evf_request_misc_irq - Initialize MSI-X interrupts
541 * @adapter: board private structure
542 *
543 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
544 * vector is only for the admin queue, and stays active even when the netdev
545 * is closed.
546 **/
547 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
548 {
549 struct net_device *netdev = adapter->netdev;
550 int err;
551
552 snprintf(adapter->misc_vector_name,
553 sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
554 dev_name(&adapter->pdev->dev));
555 err = request_irq(adapter->msix_entries[0].vector,
556 &i40evf_msix_aq, 0,
557 adapter->misc_vector_name, netdev);
558 if (err) {
559 dev_err(&adapter->pdev->dev,
560 "request_irq for %s failed: %d\n",
561 adapter->misc_vector_name, err);
562 free_irq(adapter->msix_entries[0].vector, netdev);
563 }
564 return err;
565 }
566
567 /**
568 * i40evf_free_traffic_irqs - Free MSI-X interrupts
569 * @adapter: board private structure
570 *
571 * Frees all MSI-X vectors other than 0.
572 **/
573 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
574 {
575 int i;
576 int q_vectors;
577
578 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
579
580 for (i = 0; i < q_vectors; i++) {
581 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
582 NULL);
583 free_irq(adapter->msix_entries[i+1].vector,
584 adapter->q_vector[i]);
585 }
586 }
587
588 /**
589 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
590 * @adapter: board private structure
591 *
592 * Frees MSI-X vector 0.
593 **/
594 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
595 {
596 struct net_device *netdev = adapter->netdev;
597
598 free_irq(adapter->msix_entries[0].vector, netdev);
599 }
600
601 /**
602 * i40evf_configure_tx - Configure Transmit Unit after Reset
603 * @adapter: board private structure
604 *
605 * Configure the Tx unit of the MAC after a reset.
606 **/
607 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
608 {
609 struct i40e_hw *hw = &adapter->hw;
610 int i;
611
612 for (i = 0; i < adapter->num_active_queues; i++)
613 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
614 }
615
616 /**
617 * i40evf_configure_rx - Configure Receive Unit after Reset
618 * @adapter: board private structure
619 *
620 * Configure the Rx unit of the MAC after a reset.
621 **/
622 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
623 {
624 struct i40e_hw *hw = &adapter->hw;
625 struct net_device *netdev = adapter->netdev;
626 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
627 int i;
628 int rx_buf_len;
629
630
631 adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
632 adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
633
634 /* Decide whether to use packet split mode or not */
635 if (netdev->mtu > ETH_DATA_LEN) {
636 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
637 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
638 else
639 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
640 } else {
641 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
642 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
643 else
644 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
645 }
646
647 /* Set the RX buffer length according to the mode */
648 if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
649 rx_buf_len = I40E_RX_HDR_SIZE;
650 } else {
651 if (netdev->mtu <= ETH_DATA_LEN)
652 rx_buf_len = I40EVF_RXBUFFER_2048;
653 else
654 rx_buf_len = ALIGN(max_frame, 1024);
655 }
656
657 for (i = 0; i < adapter->num_active_queues; i++) {
658 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
659 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
660 }
661 }
662
663 /**
664 * i40evf_find_vlan - Search filter list for specific vlan filter
665 * @adapter: board private structure
666 * @vlan: vlan tag
667 *
668 * Returns ptr to the filter object or NULL
669 **/
670 static struct
671 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
672 {
673 struct i40evf_vlan_filter *f;
674
675 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
676 if (vlan == f->vlan)
677 return f;
678 }
679 return NULL;
680 }
681
682 /**
683 * i40evf_add_vlan - Add a vlan filter to the list
684 * @adapter: board private structure
685 * @vlan: VLAN tag
686 *
687 * Returns ptr to the filter object or NULL when no memory available.
688 **/
689 static struct
690 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
691 {
692 struct i40evf_vlan_filter *f = NULL;
693 int count = 50;
694
695 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
696 &adapter->crit_section)) {
697 udelay(1);
698 if (--count == 0)
699 goto out;
700 }
701
702 f = i40evf_find_vlan(adapter, vlan);
703 if (!f) {
704 f = kzalloc(sizeof(*f), GFP_ATOMIC);
705 if (!f)
706 goto clearout;
707
708 f->vlan = vlan;
709
710 INIT_LIST_HEAD(&f->list);
711 list_add(&f->list, &adapter->vlan_filter_list);
712 f->add = true;
713 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
714 }
715
716 clearout:
717 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
718 out:
719 return f;
720 }
721
722 /**
723 * i40evf_del_vlan - Remove a vlan filter from the list
724 * @adapter: board private structure
725 * @vlan: VLAN tag
726 **/
727 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
728 {
729 struct i40evf_vlan_filter *f;
730 int count = 50;
731
732 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
733 &adapter->crit_section)) {
734 udelay(1);
735 if (--count == 0)
736 return;
737 }
738
739 f = i40evf_find_vlan(adapter, vlan);
740 if (f) {
741 f->remove = true;
742 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
743 }
744 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
745 }
746
747 /**
748 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
749 * @netdev: network device struct
750 * @vid: VLAN tag
751 **/
752 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
753 __always_unused __be16 proto, u16 vid)
754 {
755 struct i40evf_adapter *adapter = netdev_priv(netdev);
756
757 if (!VLAN_ALLOWED(adapter))
758 return -EIO;
759 if (i40evf_add_vlan(adapter, vid) == NULL)
760 return -ENOMEM;
761 return 0;
762 }
763
764 /**
765 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
766 * @netdev: network device struct
767 * @vid: VLAN tag
768 **/
769 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
770 __always_unused __be16 proto, u16 vid)
771 {
772 struct i40evf_adapter *adapter = netdev_priv(netdev);
773
774 if (VLAN_ALLOWED(adapter)) {
775 i40evf_del_vlan(adapter, vid);
776 return 0;
777 }
778 return -EIO;
779 }
780
781 /**
782 * i40evf_find_filter - Search filter list for specific mac filter
783 * @adapter: board private structure
784 * @macaddr: the MAC address
785 *
786 * Returns ptr to the filter object or NULL
787 **/
788 static struct
789 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
790 u8 *macaddr)
791 {
792 struct i40evf_mac_filter *f;
793
794 if (!macaddr)
795 return NULL;
796
797 list_for_each_entry(f, &adapter->mac_filter_list, list) {
798 if (ether_addr_equal(macaddr, f->macaddr))
799 return f;
800 }
801 return NULL;
802 }
803
804 /**
805 * i40e_add_filter - Add a mac filter to the filter list
806 * @adapter: board private structure
807 * @macaddr: the MAC address
808 *
809 * Returns ptr to the filter object or NULL when no memory available.
810 **/
811 static struct
812 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
813 u8 *macaddr)
814 {
815 struct i40evf_mac_filter *f;
816 int count = 50;
817
818 if (!macaddr)
819 return NULL;
820
821 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
822 &adapter->crit_section)) {
823 udelay(1);
824 if (--count == 0)
825 return NULL;
826 }
827
828 f = i40evf_find_filter(adapter, macaddr);
829 if (!f) {
830 f = kzalloc(sizeof(*f), GFP_ATOMIC);
831 if (!f) {
832 clear_bit(__I40EVF_IN_CRITICAL_TASK,
833 &adapter->crit_section);
834 return NULL;
835 }
836
837 ether_addr_copy(f->macaddr, macaddr);
838
839 list_add(&f->list, &adapter->mac_filter_list);
840 f->add = true;
841 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
842 }
843
844 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
845 return f;
846 }
847
848 /**
849 * i40evf_set_mac - NDO callback to set port mac address
850 * @netdev: network interface device structure
851 * @p: pointer to an address structure
852 *
853 * Returns 0 on success, negative on failure
854 **/
855 static int i40evf_set_mac(struct net_device *netdev, void *p)
856 {
857 struct i40evf_adapter *adapter = netdev_priv(netdev);
858 struct i40e_hw *hw = &adapter->hw;
859 struct i40evf_mac_filter *f;
860 struct sockaddr *addr = p;
861
862 if (!is_valid_ether_addr(addr->sa_data))
863 return -EADDRNOTAVAIL;
864
865 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
866 return 0;
867
868 if (adapter->flags & I40EVF_FLAG_ADDR_SET_BY_PF)
869 return -EPERM;
870
871 f = i40evf_find_filter(adapter, hw->mac.addr);
872 if (f) {
873 f->remove = true;
874 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
875 }
876
877 f = i40evf_add_filter(adapter, addr->sa_data);
878 if (f) {
879 ether_addr_copy(hw->mac.addr, addr->sa_data);
880 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
881 }
882
883 return (f == NULL) ? -ENOMEM : 0;
884 }
885
886 /**
887 * i40evf_set_rx_mode - NDO callback to set the netdev filters
888 * @netdev: network interface device structure
889 **/
890 static void i40evf_set_rx_mode(struct net_device *netdev)
891 {
892 struct i40evf_adapter *adapter = netdev_priv(netdev);
893 struct i40evf_mac_filter *f, *ftmp;
894 struct netdev_hw_addr *uca;
895 struct netdev_hw_addr *mca;
896 struct netdev_hw_addr *ha;
897 int count = 50;
898
899 /* add addr if not already in the filter list */
900 netdev_for_each_uc_addr(uca, netdev) {
901 i40evf_add_filter(adapter, uca->addr);
902 }
903 netdev_for_each_mc_addr(mca, netdev) {
904 i40evf_add_filter(adapter, mca->addr);
905 }
906
907 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
908 &adapter->crit_section)) {
909 udelay(1);
910 if (--count == 0) {
911 dev_err(&adapter->pdev->dev,
912 "Failed to get lock in %s\n", __func__);
913 return;
914 }
915 }
916 /* remove filter if not in netdev list */
917 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
918 netdev_for_each_mc_addr(mca, netdev)
919 if (ether_addr_equal(mca->addr, f->macaddr))
920 goto bottom_of_search_loop;
921
922 netdev_for_each_uc_addr(uca, netdev)
923 if (ether_addr_equal(uca->addr, f->macaddr))
924 goto bottom_of_search_loop;
925
926 for_each_dev_addr(netdev, ha)
927 if (ether_addr_equal(ha->addr, f->macaddr))
928 goto bottom_of_search_loop;
929
930 if (ether_addr_equal(f->macaddr, adapter->hw.mac.addr))
931 goto bottom_of_search_loop;
932
933 /* f->macaddr wasn't found in uc, mc, or ha list so delete it */
934 f->remove = true;
935 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
936
937 bottom_of_search_loop:
938 continue;
939 }
940 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
941 }
942
943 /**
944 * i40evf_napi_enable_all - enable NAPI on all queue vectors
945 * @adapter: board private structure
946 **/
947 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
948 {
949 int q_idx;
950 struct i40e_q_vector *q_vector;
951 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
952
953 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
954 struct napi_struct *napi;
955
956 q_vector = adapter->q_vector[q_idx];
957 napi = &q_vector->napi;
958 napi_enable(napi);
959 }
960 }
961
962 /**
963 * i40evf_napi_disable_all - disable NAPI on all queue vectors
964 * @adapter: board private structure
965 **/
966 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
967 {
968 int q_idx;
969 struct i40e_q_vector *q_vector;
970 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
971
972 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
973 q_vector = adapter->q_vector[q_idx];
974 napi_disable(&q_vector->napi);
975 }
976 }
977
978 /**
979 * i40evf_configure - set up transmit and receive data structures
980 * @adapter: board private structure
981 **/
982 static void i40evf_configure(struct i40evf_adapter *adapter)
983 {
984 struct net_device *netdev = adapter->netdev;
985 int i;
986
987 i40evf_set_rx_mode(netdev);
988
989 i40evf_configure_tx(adapter);
990 i40evf_configure_rx(adapter);
991 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
992
993 for (i = 0; i < adapter->num_active_queues; i++) {
994 struct i40e_ring *ring = adapter->rx_rings[i];
995
996 i40evf_alloc_rx_buffers_1buf(ring, ring->count);
997 ring->next_to_use = ring->count - 1;
998 writel(ring->next_to_use, ring->tail);
999 }
1000 }
1001
1002 /**
1003 * i40evf_up_complete - Finish the last steps of bringing up a connection
1004 * @adapter: board private structure
1005 **/
1006 static int i40evf_up_complete(struct i40evf_adapter *adapter)
1007 {
1008 adapter->state = __I40EVF_RUNNING;
1009 clear_bit(__I40E_DOWN, &adapter->vsi.state);
1010
1011 i40evf_napi_enable_all(adapter);
1012
1013 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
1014 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
1015 return 0;
1016 }
1017
1018 /**
1019 * i40e_down - Shutdown the connection processing
1020 * @adapter: board private structure
1021 **/
1022 void i40evf_down(struct i40evf_adapter *adapter)
1023 {
1024 struct net_device *netdev = adapter->netdev;
1025 struct i40evf_mac_filter *f;
1026
1027 if (adapter->state == __I40EVF_DOWN)
1028 return;
1029
1030 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1031 &adapter->crit_section))
1032 usleep_range(500, 1000);
1033
1034 netif_carrier_off(netdev);
1035 netif_tx_disable(netdev);
1036 i40evf_napi_disable_all(adapter);
1037 i40evf_irq_disable(adapter);
1038
1039 /* remove all MAC filters */
1040 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1041 f->remove = true;
1042 }
1043 /* remove all VLAN filters */
1044 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1045 f->remove = true;
1046 }
1047 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1048 adapter->state != __I40EVF_RESETTING) {
1049 /* cancel any current operation */
1050 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1051 /* Schedule operations to close down the HW. Don't wait
1052 * here for this to complete. The watchdog is still running
1053 * and it will take care of this.
1054 */
1055 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
1056 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
1057 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
1058 }
1059
1060 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1061 }
1062
1063 /**
1064 * i40evf_acquire_msix_vectors - Setup the MSIX capability
1065 * @adapter: board private structure
1066 * @vectors: number of vectors to request
1067 *
1068 * Work with the OS to set up the MSIX vectors needed.
1069 *
1070 * Returns 0 on success, negative on failure
1071 **/
1072 static int
1073 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1074 {
1075 int err, vector_threshold;
1076
1077 /* We'll want at least 3 (vector_threshold):
1078 * 0) Other (Admin Queue and link, mostly)
1079 * 1) TxQ[0] Cleanup
1080 * 2) RxQ[0] Cleanup
1081 */
1082 vector_threshold = MIN_MSIX_COUNT;
1083
1084 /* The more we get, the more we will assign to Tx/Rx Cleanup
1085 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1086 * Right now, we simply care about how many we'll get; we'll
1087 * set them up later while requesting irq's.
1088 */
1089 err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1090 vector_threshold, vectors);
1091 if (err < 0) {
1092 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1093 kfree(adapter->msix_entries);
1094 adapter->msix_entries = NULL;
1095 return err;
1096 }
1097
1098 /* Adjust for only the vectors we'll use, which is minimum
1099 * of max_msix_q_vectors + NONQ_VECS, or the number of
1100 * vectors we were allocated.
1101 */
1102 adapter->num_msix_vectors = err;
1103 return 0;
1104 }
1105
1106 /**
1107 * i40evf_free_queues - Free memory for all rings
1108 * @adapter: board private structure to initialize
1109 *
1110 * Free all of the memory associated with queue pairs.
1111 **/
1112 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1113 {
1114 int i;
1115
1116 if (!adapter->vsi_res)
1117 return;
1118 for (i = 0; i < adapter->num_active_queues; i++) {
1119 if (adapter->tx_rings[i])
1120 kfree_rcu(adapter->tx_rings[i], rcu);
1121 adapter->tx_rings[i] = NULL;
1122 adapter->rx_rings[i] = NULL;
1123 }
1124 }
1125
1126 /**
1127 * i40evf_alloc_queues - Allocate memory for all rings
1128 * @adapter: board private structure to initialize
1129 *
1130 * We allocate one ring per queue at run-time since we don't know the
1131 * number of queues at compile-time. The polling_netdev array is
1132 * intended for Multiqueue, but should work fine with a single queue.
1133 **/
1134 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1135 {
1136 int i;
1137
1138 for (i = 0; i < adapter->num_active_queues; i++) {
1139 struct i40e_ring *tx_ring;
1140 struct i40e_ring *rx_ring;
1141
1142 tx_ring = kzalloc(sizeof(*tx_ring) * 2, GFP_KERNEL);
1143 if (!tx_ring)
1144 goto err_out;
1145
1146 tx_ring->queue_index = i;
1147 tx_ring->netdev = adapter->netdev;
1148 tx_ring->dev = &adapter->pdev->dev;
1149 tx_ring->count = adapter->tx_desc_count;
1150 if (adapter->flags & I40E_FLAG_WB_ON_ITR_CAPABLE)
1151 tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR;
1152 adapter->tx_rings[i] = tx_ring;
1153
1154 rx_ring = &tx_ring[1];
1155 rx_ring->queue_index = i;
1156 rx_ring->netdev = adapter->netdev;
1157 rx_ring->dev = &adapter->pdev->dev;
1158 rx_ring->count = adapter->rx_desc_count;
1159 adapter->rx_rings[i] = rx_ring;
1160 }
1161
1162 return 0;
1163
1164 err_out:
1165 i40evf_free_queues(adapter);
1166 return -ENOMEM;
1167 }
1168
1169 /**
1170 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1171 * @adapter: board private structure to initialize
1172 *
1173 * Attempt to configure the interrupts using the best available
1174 * capabilities of the hardware and the kernel.
1175 **/
1176 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1177 {
1178 int vector, v_budget;
1179 int pairs = 0;
1180 int err = 0;
1181
1182 if (!adapter->vsi_res) {
1183 err = -EIO;
1184 goto out;
1185 }
1186 pairs = adapter->num_active_queues;
1187
1188 /* It's easy to be greedy for MSI-X vectors, but it really
1189 * doesn't do us much good if we have a lot more vectors
1190 * than CPU's. So let's be conservative and only ask for
1191 * (roughly) twice the number of vectors as there are CPU's.
1192 */
1193 v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1194 v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1195
1196 adapter->msix_entries = kcalloc(v_budget,
1197 sizeof(struct msix_entry), GFP_KERNEL);
1198 if (!adapter->msix_entries) {
1199 err = -ENOMEM;
1200 goto out;
1201 }
1202
1203 for (vector = 0; vector < v_budget; vector++)
1204 adapter->msix_entries[vector].entry = vector;
1205
1206 err = i40evf_acquire_msix_vectors(adapter, v_budget);
1207
1208 out:
1209 adapter->netdev->real_num_tx_queues = pairs;
1210 return err;
1211 }
1212
1213 /**
1214 * i40e_config_rss_aq - Prepare for RSS using AQ commands
1215 * @vsi: vsi structure
1216 * @seed: RSS hash seed
1217 * @lut: Lookup table
1218 * @lut_size: Lookup table size
1219 *
1220 * Return 0 on success, negative on failure
1221 **/
1222 static int i40evf_config_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
1223 u8 *lut, u16 lut_size)
1224 {
1225 struct i40evf_adapter *adapter = vsi->back;
1226 struct i40e_hw *hw = &adapter->hw;
1227 int ret = 0;
1228
1229 if (!vsi->id)
1230 return -EINVAL;
1231
1232 if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
1233 /* bail because we already have a command pending */
1234 dev_err(&adapter->pdev->dev, "Cannot confiure RSS, command %d pending\n",
1235 adapter->current_op);
1236 return -EBUSY;
1237 }
1238
1239 if (seed) {
1240 struct i40e_aqc_get_set_rss_key_data *rss_key =
1241 (struct i40e_aqc_get_set_rss_key_data *)seed;
1242 ret = i40evf_aq_set_rss_key(hw, vsi->id, rss_key);
1243 if (ret) {
1244 dev_err(&adapter->pdev->dev, "Cannot set RSS key, err %s aq_err %s\n",
1245 i40evf_stat_str(hw, ret),
1246 i40evf_aq_str(hw, hw->aq.asq_last_status));
1247 return ret;
1248 }
1249 }
1250
1251 if (lut) {
1252 ret = i40evf_aq_set_rss_lut(hw, vsi->id, false, lut, lut_size);
1253 if (ret) {
1254 dev_err(&adapter->pdev->dev,
1255 "Cannot set RSS lut, err %s aq_err %s\n",
1256 i40evf_stat_str(hw, ret),
1257 i40evf_aq_str(hw, hw->aq.asq_last_status));
1258 return ret;
1259 }
1260 }
1261
1262 return ret;
1263 }
1264
1265 /**
1266 * i40evf_config_rss_reg - Configure RSS keys and lut by writing registers
1267 * @vsi: Pointer to vsi structure
1268 * @seed: RSS hash seed
1269 * @lut: Lookup table
1270 * @lut_size: Lookup table size
1271 *
1272 * Returns 0 on success, negative on failure
1273 **/
1274 static int i40evf_config_rss_reg(struct i40e_vsi *vsi, const u8 *seed,
1275 const u8 *lut, u16 lut_size)
1276 {
1277 struct i40evf_adapter *adapter = vsi->back;
1278 struct i40e_hw *hw = &adapter->hw;
1279 u16 i;
1280
1281 if (seed) {
1282 u32 *seed_dw = (u32 *)seed;
1283
1284 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1285 wr32(hw, I40E_VFQF_HKEY(i), seed_dw[i]);
1286 }
1287
1288 if (lut) {
1289 u32 *lut_dw = (u32 *)lut;
1290
1291 if (lut_size != I40EVF_HLUT_ARRAY_SIZE)
1292 return -EINVAL;
1293
1294 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++)
1295 wr32(hw, I40E_VFQF_HLUT(i), lut_dw[i]);
1296 }
1297 i40e_flush(hw);
1298
1299 return 0;
1300 }
1301
1302 /**
1303 * i40evf_config_rss - Configure RSS keys and lut
1304 * @vsi: Pointer to vsi structure
1305 * @seed: RSS hash seed
1306 * @lut: Lookup table
1307 * @lut_size: Lookup table size
1308 *
1309 * Returns 0 on success, negative on failure
1310 **/
1311 int i40evf_config_rss(struct i40e_vsi *vsi, const u8 *seed,
1312 u8 *lut, u16 lut_size)
1313 {
1314 struct i40evf_adapter *adapter = vsi->back;
1315
1316 if (RSS_AQ(adapter))
1317 return i40evf_config_rss_aq(vsi, seed, lut, lut_size);
1318 else
1319 return i40evf_config_rss_reg(vsi, seed, lut, lut_size);
1320 }
1321
1322 /**
1323 * i40evf_fill_rss_lut - Fill the lut with default values
1324 * @lut: Lookup table to be filled with
1325 * @rss_table_size: Lookup table size
1326 * @rss_size: Range of queue number for hashing
1327 **/
1328 static void i40evf_fill_rss_lut(u8 *lut, u16 rss_table_size, u16 rss_size)
1329 {
1330 u16 i;
1331
1332 for (i = 0; i < rss_table_size; i++)
1333 lut[i] = i % rss_size;
1334 }
1335
1336 /**
1337 * i40evf_init_rss - Prepare for RSS
1338 * @adapter: board private structure
1339 *
1340 * Return 0 on success, negative on failure
1341 **/
1342 static int i40evf_init_rss(struct i40evf_adapter *adapter)
1343 {
1344 struct i40e_vsi *vsi = &adapter->vsi;
1345 struct i40e_hw *hw = &adapter->hw;
1346 u8 seed[I40EVF_HKEY_ARRAY_SIZE];
1347 u64 hena;
1348 u8 *lut;
1349 int ret;
1350
1351 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1352 hena = I40E_DEFAULT_RSS_HENA;
1353 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1354 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1355
1356 lut = kzalloc(I40EVF_HLUT_ARRAY_SIZE, GFP_KERNEL);
1357 if (!lut)
1358 return -ENOMEM;
1359 i40evf_fill_rss_lut(lut, I40EVF_HLUT_ARRAY_SIZE,
1360 adapter->num_active_queues);
1361 netdev_rss_key_fill((void *)seed, I40EVF_HKEY_ARRAY_SIZE);
1362 ret = i40evf_config_rss(vsi, seed, lut, I40EVF_HLUT_ARRAY_SIZE);
1363 kfree(lut);
1364
1365 return ret;
1366 }
1367
1368 /**
1369 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1370 * @adapter: board private structure to initialize
1371 *
1372 * We allocate one q_vector per queue interrupt. If allocation fails we
1373 * return -ENOMEM.
1374 **/
1375 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1376 {
1377 int q_idx, num_q_vectors;
1378 struct i40e_q_vector *q_vector;
1379
1380 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1381
1382 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1383 q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL);
1384 if (!q_vector)
1385 goto err_out;
1386 q_vector->adapter = adapter;
1387 q_vector->vsi = &adapter->vsi;
1388 q_vector->v_idx = q_idx;
1389 netif_napi_add(adapter->netdev, &q_vector->napi,
1390 i40evf_napi_poll, NAPI_POLL_WEIGHT);
1391 adapter->q_vector[q_idx] = q_vector;
1392 }
1393
1394 return 0;
1395
1396 err_out:
1397 while (q_idx) {
1398 q_idx--;
1399 q_vector = adapter->q_vector[q_idx];
1400 netif_napi_del(&q_vector->napi);
1401 kfree(q_vector);
1402 adapter->q_vector[q_idx] = NULL;
1403 }
1404 return -ENOMEM;
1405 }
1406
1407 /**
1408 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1409 * @adapter: board private structure to initialize
1410 *
1411 * This function frees the memory allocated to the q_vectors. In addition if
1412 * NAPI is enabled it will delete any references to the NAPI struct prior
1413 * to freeing the q_vector.
1414 **/
1415 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1416 {
1417 int q_idx, num_q_vectors;
1418 int napi_vectors;
1419
1420 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1421 napi_vectors = adapter->num_active_queues;
1422
1423 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1424 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1425
1426 adapter->q_vector[q_idx] = NULL;
1427 if (q_idx < napi_vectors)
1428 netif_napi_del(&q_vector->napi);
1429 kfree(q_vector);
1430 }
1431 }
1432
1433 /**
1434 * i40evf_reset_interrupt_capability - Reset MSIX setup
1435 * @adapter: board private structure
1436 *
1437 **/
1438 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1439 {
1440 pci_disable_msix(adapter->pdev);
1441 kfree(adapter->msix_entries);
1442 adapter->msix_entries = NULL;
1443 }
1444
1445 /**
1446 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1447 * @adapter: board private structure to initialize
1448 *
1449 **/
1450 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1451 {
1452 int err;
1453
1454 err = i40evf_set_interrupt_capability(adapter);
1455 if (err) {
1456 dev_err(&adapter->pdev->dev,
1457 "Unable to setup interrupt capabilities\n");
1458 goto err_set_interrupt;
1459 }
1460
1461 err = i40evf_alloc_q_vectors(adapter);
1462 if (err) {
1463 dev_err(&adapter->pdev->dev,
1464 "Unable to allocate memory for queue vectors\n");
1465 goto err_alloc_q_vectors;
1466 }
1467
1468 err = i40evf_alloc_queues(adapter);
1469 if (err) {
1470 dev_err(&adapter->pdev->dev,
1471 "Unable to allocate memory for queues\n");
1472 goto err_alloc_queues;
1473 }
1474
1475 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1476 (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1477 adapter->num_active_queues);
1478
1479 return 0;
1480 err_alloc_queues:
1481 i40evf_free_q_vectors(adapter);
1482 err_alloc_q_vectors:
1483 i40evf_reset_interrupt_capability(adapter);
1484 err_set_interrupt:
1485 return err;
1486 }
1487
1488 /**
1489 * i40evf_watchdog_timer - Periodic call-back timer
1490 * @data: pointer to adapter disguised as unsigned long
1491 **/
1492 static void i40evf_watchdog_timer(unsigned long data)
1493 {
1494 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1495
1496 schedule_work(&adapter->watchdog_task);
1497 /* timer will be rescheduled in watchdog task */
1498 }
1499
1500 /**
1501 * i40evf_watchdog_task - Periodic call-back task
1502 * @work: pointer to work_struct
1503 **/
1504 static void i40evf_watchdog_task(struct work_struct *work)
1505 {
1506 struct i40evf_adapter *adapter = container_of(work,
1507 struct i40evf_adapter,
1508 watchdog_task);
1509 struct i40e_hw *hw = &adapter->hw;
1510 u32 reg_val;
1511
1512 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1513 goto restart_watchdog;
1514
1515 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1516 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1517 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1518 if ((reg_val == I40E_VFR_VFACTIVE) ||
1519 (reg_val == I40E_VFR_COMPLETED)) {
1520 /* A chance for redemption! */
1521 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1522 adapter->state = __I40EVF_STARTUP;
1523 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1524 schedule_delayed_work(&adapter->init_task, 10);
1525 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1526 &adapter->crit_section);
1527 /* Don't reschedule the watchdog, since we've restarted
1528 * the init task. When init_task contacts the PF and
1529 * gets everything set up again, it'll restart the
1530 * watchdog for us. Down, boy. Sit. Stay. Woof.
1531 */
1532 return;
1533 }
1534 adapter->aq_required = 0;
1535 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1536 goto watchdog_done;
1537 }
1538
1539 if ((adapter->state < __I40EVF_DOWN) ||
1540 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1541 goto watchdog_done;
1542
1543 /* check for reset */
1544 reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
1545 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
1546 adapter->state = __I40EVF_RESETTING;
1547 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1548 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1549 schedule_work(&adapter->reset_task);
1550 adapter->aq_required = 0;
1551 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1552 goto watchdog_done;
1553 }
1554
1555 /* Process admin queue tasks. After init, everything gets done
1556 * here so we don't race on the admin queue.
1557 */
1558 if (adapter->current_op) {
1559 if (!i40evf_asq_done(hw)) {
1560 dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1561 i40evf_send_api_ver(adapter);
1562 }
1563 goto watchdog_done;
1564 }
1565 if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
1566 i40evf_send_vf_config_msg(adapter);
1567 goto watchdog_done;
1568 }
1569
1570 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1571 i40evf_disable_queues(adapter);
1572 goto watchdog_done;
1573 }
1574
1575 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1576 i40evf_map_queues(adapter);
1577 goto watchdog_done;
1578 }
1579
1580 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1581 i40evf_add_ether_addrs(adapter);
1582 goto watchdog_done;
1583 }
1584
1585 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1586 i40evf_add_vlans(adapter);
1587 goto watchdog_done;
1588 }
1589
1590 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1591 i40evf_del_ether_addrs(adapter);
1592 goto watchdog_done;
1593 }
1594
1595 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1596 i40evf_del_vlans(adapter);
1597 goto watchdog_done;
1598 }
1599
1600 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1601 i40evf_configure_queues(adapter);
1602 goto watchdog_done;
1603 }
1604
1605 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1606 i40evf_enable_queues(adapter);
1607 goto watchdog_done;
1608 }
1609
1610 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
1611 /* This message goes straight to the firmware, not the
1612 * PF, so we don't have to set current_op as we will
1613 * not get a response through the ARQ.
1614 */
1615 i40evf_init_rss(adapter);
1616 adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
1617 goto watchdog_done;
1618 }
1619
1620 if (adapter->state == __I40EVF_RUNNING)
1621 i40evf_request_stats(adapter);
1622 watchdog_done:
1623 if (adapter->state == __I40EVF_RUNNING) {
1624 i40evf_irq_enable_queues(adapter, ~0);
1625 i40evf_fire_sw_int(adapter, 0xFF);
1626 } else {
1627 i40evf_fire_sw_int(adapter, 0x1);
1628 }
1629
1630 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1631 restart_watchdog:
1632 if (adapter->state == __I40EVF_REMOVE)
1633 return;
1634 if (adapter->aq_required)
1635 mod_timer(&adapter->watchdog_timer,
1636 jiffies + msecs_to_jiffies(20));
1637 else
1638 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1639 schedule_work(&adapter->adminq_task);
1640 }
1641
1642 #define I40EVF_RESET_WAIT_MS 10
1643 #define I40EVF_RESET_WAIT_COUNT 500
1644 /**
1645 * i40evf_reset_task - Call-back task to handle hardware reset
1646 * @work: pointer to work_struct
1647 *
1648 * During reset we need to shut down and reinitialize the admin queue
1649 * before we can use it to communicate with the PF again. We also clear
1650 * and reinit the rings because that context is lost as well.
1651 **/
1652 static void i40evf_reset_task(struct work_struct *work)
1653 {
1654 struct i40evf_adapter *adapter = container_of(work,
1655 struct i40evf_adapter,
1656 reset_task);
1657 struct net_device *netdev = adapter->netdev;
1658 struct i40e_hw *hw = &adapter->hw;
1659 struct i40evf_vlan_filter *vlf;
1660 struct i40evf_mac_filter *f;
1661 u32 reg_val;
1662 int i = 0, err;
1663
1664 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1665 &adapter->crit_section))
1666 usleep_range(500, 1000);
1667
1668 i40evf_misc_irq_disable(adapter);
1669 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1670 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1671 /* Restart the AQ here. If we have been reset but didn't
1672 * detect it, or if the PF had to reinit, our AQ will be hosed.
1673 */
1674 i40evf_shutdown_adminq(hw);
1675 i40evf_init_adminq(hw);
1676 i40evf_request_reset(adapter);
1677 }
1678 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1679
1680 /* poll until we see the reset actually happen */
1681 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1682 reg_val = rd32(hw, I40E_VF_ARQLEN1) &
1683 I40E_VF_ARQLEN1_ARQENABLE_MASK;
1684 if (!reg_val)
1685 break;
1686 usleep_range(5000, 10000);
1687 }
1688 if (i == I40EVF_RESET_WAIT_COUNT) {
1689 dev_info(&adapter->pdev->dev, "Never saw reset\n");
1690 goto continue_reset; /* act like the reset happened */
1691 }
1692
1693 /* wait until the reset is complete and the PF is responding to us */
1694 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1695 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1696 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1697 if (reg_val == I40E_VFR_VFACTIVE)
1698 break;
1699 msleep(I40EVF_RESET_WAIT_MS);
1700 }
1701 /* extra wait to make sure minimum wait is met */
1702 msleep(I40EVF_RESET_WAIT_MS);
1703 if (i == I40EVF_RESET_WAIT_COUNT) {
1704 struct i40evf_mac_filter *ftmp;
1705 struct i40evf_vlan_filter *fv, *fvtmp;
1706
1707 /* reset never finished */
1708 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1709 reg_val);
1710 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1711
1712 if (netif_running(adapter->netdev)) {
1713 set_bit(__I40E_DOWN, &adapter->vsi.state);
1714 netif_carrier_off(netdev);
1715 netif_tx_disable(netdev);
1716 i40evf_napi_disable_all(adapter);
1717 i40evf_irq_disable(adapter);
1718 i40evf_free_traffic_irqs(adapter);
1719 i40evf_free_all_tx_resources(adapter);
1720 i40evf_free_all_rx_resources(adapter);
1721 }
1722
1723 /* Delete all of the filters, both MAC and VLAN. */
1724 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1725 list) {
1726 list_del(&f->list);
1727 kfree(f);
1728 }
1729
1730 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1731 list) {
1732 list_del(&fv->list);
1733 kfree(fv);
1734 }
1735
1736 i40evf_free_misc_irq(adapter);
1737 i40evf_reset_interrupt_capability(adapter);
1738 i40evf_free_queues(adapter);
1739 i40evf_free_q_vectors(adapter);
1740 kfree(adapter->vf_res);
1741 i40evf_shutdown_adminq(hw);
1742 adapter->netdev->flags &= ~IFF_UP;
1743 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1744 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1745 dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
1746 return; /* Do not attempt to reinit. It's dead, Jim. */
1747 }
1748
1749 continue_reset:
1750 if (netif_running(adapter->netdev)) {
1751 netif_carrier_off(netdev);
1752 netif_tx_stop_all_queues(netdev);
1753 i40evf_napi_disable_all(adapter);
1754 }
1755 i40evf_irq_disable(adapter);
1756
1757 adapter->state = __I40EVF_RESETTING;
1758 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1759
1760 /* free the Tx/Rx rings and descriptors, might be better to just
1761 * re-use them sometime in the future
1762 */
1763 i40evf_free_all_rx_resources(adapter);
1764 i40evf_free_all_tx_resources(adapter);
1765
1766 /* kill and reinit the admin queue */
1767 if (i40evf_shutdown_adminq(hw))
1768 dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
1769 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1770 err = i40evf_init_adminq(hw);
1771 if (err)
1772 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1773 err);
1774
1775 adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG;
1776 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
1777
1778 /* re-add all MAC filters */
1779 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1780 f->add = true;
1781 }
1782 /* re-add all VLAN filters */
1783 list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
1784 vlf->add = true;
1785 }
1786 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1787 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1788 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1789 i40evf_misc_irq_enable(adapter);
1790
1791 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1792
1793 if (netif_running(adapter->netdev)) {
1794 /* allocate transmit descriptors */
1795 err = i40evf_setup_all_tx_resources(adapter);
1796 if (err)
1797 goto reset_err;
1798
1799 /* allocate receive descriptors */
1800 err = i40evf_setup_all_rx_resources(adapter);
1801 if (err)
1802 goto reset_err;
1803
1804 i40evf_configure(adapter);
1805
1806 err = i40evf_up_complete(adapter);
1807 if (err)
1808 goto reset_err;
1809
1810 i40evf_irq_enable(adapter, true);
1811 } else {
1812 adapter->state = __I40EVF_DOWN;
1813 }
1814
1815 return;
1816 reset_err:
1817 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1818 i40evf_close(adapter->netdev);
1819 }
1820
1821 /**
1822 * i40evf_adminq_task - worker thread to clean the admin queue
1823 * @work: pointer to work_struct containing our data
1824 **/
1825 static void i40evf_adminq_task(struct work_struct *work)
1826 {
1827 struct i40evf_adapter *adapter =
1828 container_of(work, struct i40evf_adapter, adminq_task);
1829 struct i40e_hw *hw = &adapter->hw;
1830 struct i40e_arq_event_info event;
1831 struct i40e_virtchnl_msg *v_msg;
1832 i40e_status ret;
1833 u32 val, oldval;
1834 u16 pending;
1835
1836 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1837 goto out;
1838
1839 event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1840 event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1841 if (!event.msg_buf)
1842 goto out;
1843
1844 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1845 do {
1846 ret = i40evf_clean_arq_element(hw, &event, &pending);
1847 if (ret || !v_msg->v_opcode)
1848 break; /* No event to process or error cleaning ARQ */
1849
1850 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1851 v_msg->v_retval, event.msg_buf,
1852 event.msg_len);
1853 if (pending != 0)
1854 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1855 } while (pending);
1856
1857 if ((adapter->flags &
1858 (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
1859 adapter->state == __I40EVF_RESETTING)
1860 goto freedom;
1861
1862 /* check for error indications */
1863 val = rd32(hw, hw->aq.arq.len);
1864 oldval = val;
1865 if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
1866 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1867 val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
1868 }
1869 if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
1870 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1871 val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
1872 }
1873 if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
1874 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1875 val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
1876 }
1877 if (oldval != val)
1878 wr32(hw, hw->aq.arq.len, val);
1879
1880 val = rd32(hw, hw->aq.asq.len);
1881 oldval = val;
1882 if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
1883 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1884 val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
1885 }
1886 if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
1887 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1888 val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
1889 }
1890 if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
1891 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1892 val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
1893 }
1894 if (oldval != val)
1895 wr32(hw, hw->aq.asq.len, val);
1896
1897 freedom:
1898 kfree(event.msg_buf);
1899 out:
1900 /* re-enable Admin queue interrupt cause */
1901 i40evf_misc_irq_enable(adapter);
1902 }
1903
1904 /**
1905 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1906 * @adapter: board private structure
1907 *
1908 * Free all transmit software resources
1909 **/
1910 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1911 {
1912 int i;
1913
1914 for (i = 0; i < adapter->num_active_queues; i++)
1915 if (adapter->tx_rings[i]->desc)
1916 i40evf_free_tx_resources(adapter->tx_rings[i]);
1917 }
1918
1919 /**
1920 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1921 * @adapter: board private structure
1922 *
1923 * If this function returns with an error, then it's possible one or
1924 * more of the rings is populated (while the rest are not). It is the
1925 * callers duty to clean those orphaned rings.
1926 *
1927 * Return 0 on success, negative on failure
1928 **/
1929 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1930 {
1931 int i, err = 0;
1932
1933 for (i = 0; i < adapter->num_active_queues; i++) {
1934 adapter->tx_rings[i]->count = adapter->tx_desc_count;
1935 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1936 if (!err)
1937 continue;
1938 dev_err(&adapter->pdev->dev,
1939 "Allocation for Tx Queue %u failed\n", i);
1940 break;
1941 }
1942
1943 return err;
1944 }
1945
1946 /**
1947 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1948 * @adapter: board private structure
1949 *
1950 * If this function returns with an error, then it's possible one or
1951 * more of the rings is populated (while the rest are not). It is the
1952 * callers duty to clean those orphaned rings.
1953 *
1954 * Return 0 on success, negative on failure
1955 **/
1956 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1957 {
1958 int i, err = 0;
1959
1960 for (i = 0; i < adapter->num_active_queues; i++) {
1961 adapter->rx_rings[i]->count = adapter->rx_desc_count;
1962 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1963 if (!err)
1964 continue;
1965 dev_err(&adapter->pdev->dev,
1966 "Allocation for Rx Queue %u failed\n", i);
1967 break;
1968 }
1969 return err;
1970 }
1971
1972 /**
1973 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1974 * @adapter: board private structure
1975 *
1976 * Free all receive software resources
1977 **/
1978 void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1979 {
1980 int i;
1981
1982 for (i = 0; i < adapter->num_active_queues; i++)
1983 if (adapter->rx_rings[i]->desc)
1984 i40evf_free_rx_resources(adapter->rx_rings[i]);
1985 }
1986
1987 /**
1988 * i40evf_open - Called when a network interface is made active
1989 * @netdev: network interface device structure
1990 *
1991 * Returns 0 on success, negative value on failure
1992 *
1993 * The open entry point is called when a network interface is made
1994 * active by the system (IFF_UP). At this point all resources needed
1995 * for transmit and receive operations are allocated, the interrupt
1996 * handler is registered with the OS, the watchdog timer is started,
1997 * and the stack is notified that the interface is ready.
1998 **/
1999 static int i40evf_open(struct net_device *netdev)
2000 {
2001 struct i40evf_adapter *adapter = netdev_priv(netdev);
2002 int err;
2003
2004 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
2005 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
2006 return -EIO;
2007 }
2008 if (adapter->state != __I40EVF_DOWN || adapter->aq_required)
2009 return -EBUSY;
2010
2011 /* allocate transmit descriptors */
2012 err = i40evf_setup_all_tx_resources(adapter);
2013 if (err)
2014 goto err_setup_tx;
2015
2016 /* allocate receive descriptors */
2017 err = i40evf_setup_all_rx_resources(adapter);
2018 if (err)
2019 goto err_setup_rx;
2020
2021 /* clear any pending interrupts, may auto mask */
2022 err = i40evf_request_traffic_irqs(adapter, netdev->name);
2023 if (err)
2024 goto err_req_irq;
2025
2026 i40evf_add_filter(adapter, adapter->hw.mac.addr);
2027 i40evf_configure(adapter);
2028
2029 err = i40evf_up_complete(adapter);
2030 if (err)
2031 goto err_req_irq;
2032
2033 i40evf_irq_enable(adapter, true);
2034
2035 return 0;
2036
2037 err_req_irq:
2038 i40evf_down(adapter);
2039 i40evf_free_traffic_irqs(adapter);
2040 err_setup_rx:
2041 i40evf_free_all_rx_resources(adapter);
2042 err_setup_tx:
2043 i40evf_free_all_tx_resources(adapter);
2044
2045 return err;
2046 }
2047
2048 /**
2049 * i40evf_close - Disables a network interface
2050 * @netdev: network interface device structure
2051 *
2052 * Returns 0, this is not allowed to fail
2053 *
2054 * The close entry point is called when an interface is de-activated
2055 * by the OS. The hardware is still under the drivers control, but
2056 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
2057 * are freed, along with all transmit and receive resources.
2058 **/
2059 static int i40evf_close(struct net_device *netdev)
2060 {
2061 struct i40evf_adapter *adapter = netdev_priv(netdev);
2062
2063 if (adapter->state <= __I40EVF_DOWN)
2064 return 0;
2065
2066
2067 set_bit(__I40E_DOWN, &adapter->vsi.state);
2068
2069 i40evf_down(adapter);
2070 adapter->state = __I40EVF_DOWN;
2071 i40evf_free_traffic_irqs(adapter);
2072
2073 return 0;
2074 }
2075
2076 /**
2077 * i40evf_get_stats - Get System Network Statistics
2078 * @netdev: network interface device structure
2079 *
2080 * Returns the address of the device statistics structure.
2081 * The statistics are actually updated from the timer callback.
2082 **/
2083 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
2084 {
2085 struct i40evf_adapter *adapter = netdev_priv(netdev);
2086
2087 /* only return the current stats */
2088 return &adapter->net_stats;
2089 }
2090
2091 /**
2092 * i40evf_change_mtu - Change the Maximum Transfer Unit
2093 * @netdev: network interface device structure
2094 * @new_mtu: new value for maximum frame size
2095 *
2096 * Returns 0 on success, negative on failure
2097 **/
2098 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
2099 {
2100 struct i40evf_adapter *adapter = netdev_priv(netdev);
2101 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2102
2103 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
2104 return -EINVAL;
2105
2106 netdev->mtu = new_mtu;
2107 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
2108 schedule_work(&adapter->reset_task);
2109
2110 return 0;
2111 }
2112
2113 static const struct net_device_ops i40evf_netdev_ops = {
2114 .ndo_open = i40evf_open,
2115 .ndo_stop = i40evf_close,
2116 .ndo_start_xmit = i40evf_xmit_frame,
2117 .ndo_get_stats = i40evf_get_stats,
2118 .ndo_set_rx_mode = i40evf_set_rx_mode,
2119 .ndo_validate_addr = eth_validate_addr,
2120 .ndo_set_mac_address = i40evf_set_mac,
2121 .ndo_change_mtu = i40evf_change_mtu,
2122 .ndo_tx_timeout = i40evf_tx_timeout,
2123 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
2124 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
2125 #ifdef CONFIG_NET_POLL_CONTROLLER
2126 .ndo_poll_controller = i40evf_netpoll,
2127 #endif
2128 };
2129
2130 /**
2131 * i40evf_check_reset_complete - check that VF reset is complete
2132 * @hw: pointer to hw struct
2133 *
2134 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
2135 **/
2136 static int i40evf_check_reset_complete(struct i40e_hw *hw)
2137 {
2138 u32 rstat;
2139 int i;
2140
2141 for (i = 0; i < 100; i++) {
2142 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
2143 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
2144 if ((rstat == I40E_VFR_VFACTIVE) ||
2145 (rstat == I40E_VFR_COMPLETED))
2146 return 0;
2147 usleep_range(10, 20);
2148 }
2149 return -EBUSY;
2150 }
2151
2152 /**
2153 * i40evf_process_config - Process the config information we got from the PF
2154 * @adapter: board private structure
2155 *
2156 * Verify that we have a valid config struct, and set up our netdev features
2157 * and our VSI struct.
2158 **/
2159 int i40evf_process_config(struct i40evf_adapter *adapter)
2160 {
2161 struct net_device *netdev = adapter->netdev;
2162 int i;
2163
2164 /* got VF config message back from PF, now we can parse it */
2165 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2166 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2167 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2168 }
2169 if (!adapter->vsi_res) {
2170 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
2171 return -ENODEV;
2172 }
2173
2174 if (adapter->vf_res->vf_offload_flags
2175 & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2176 netdev->vlan_features = netdev->features &
2177 ~(NETIF_F_HW_VLAN_CTAG_TX |
2178 NETIF_F_HW_VLAN_CTAG_RX |
2179 NETIF_F_HW_VLAN_CTAG_FILTER);
2180 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2181 NETIF_F_HW_VLAN_CTAG_RX |
2182 NETIF_F_HW_VLAN_CTAG_FILTER;
2183 }
2184 netdev->features |= NETIF_F_HIGHDMA |
2185 NETIF_F_SG |
2186 NETIF_F_IP_CSUM |
2187 NETIF_F_SCTP_CSUM |
2188 NETIF_F_IPV6_CSUM |
2189 NETIF_F_TSO |
2190 NETIF_F_TSO6 |
2191 NETIF_F_RXCSUM |
2192 NETIF_F_GRO;
2193
2194 /* copy netdev features into list of user selectable features */
2195 netdev->hw_features |= netdev->features;
2196 netdev->hw_features &= ~NETIF_F_RXCSUM;
2197
2198 adapter->vsi.id = adapter->vsi_res->vsi_id;
2199
2200 adapter->vsi.back = adapter;
2201 adapter->vsi.base_vector = 1;
2202 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2203 adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2204 ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2205 adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2206 ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2207 adapter->vsi.netdev = adapter->netdev;
2208 adapter->vsi.qs_handle = adapter->vsi_res->qset_handle;
2209 return 0;
2210 }
2211
2212 /**
2213 * i40evf_init_task - worker thread to perform delayed initialization
2214 * @work: pointer to work_struct containing our data
2215 *
2216 * This task completes the work that was begun in probe. Due to the nature
2217 * of VF-PF communications, we may need to wait tens of milliseconds to get
2218 * responses back from the PF. Rather than busy-wait in probe and bog down the
2219 * whole system, we'll do it in a task so we can sleep.
2220 * This task only runs during driver init. Once we've established
2221 * communications with the PF driver and set up our netdev, the watchdog
2222 * takes over.
2223 **/
2224 static void i40evf_init_task(struct work_struct *work)
2225 {
2226 struct i40evf_adapter *adapter = container_of(work,
2227 struct i40evf_adapter,
2228 init_task.work);
2229 struct net_device *netdev = adapter->netdev;
2230 struct i40e_hw *hw = &adapter->hw;
2231 struct pci_dev *pdev = adapter->pdev;
2232 int err, bufsz;
2233
2234 switch (adapter->state) {
2235 case __I40EVF_STARTUP:
2236 /* driver loaded, probe complete */
2237 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2238 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2239 err = i40e_set_mac_type(hw);
2240 if (err) {
2241 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2242 err);
2243 goto err;
2244 }
2245 err = i40evf_check_reset_complete(hw);
2246 if (err) {
2247 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2248 err);
2249 goto err;
2250 }
2251 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2252 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2253 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2254 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2255
2256 err = i40evf_init_adminq(hw);
2257 if (err) {
2258 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2259 err);
2260 goto err;
2261 }
2262 err = i40evf_send_api_ver(adapter);
2263 if (err) {
2264 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2265 i40evf_shutdown_adminq(hw);
2266 goto err;
2267 }
2268 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2269 goto restart;
2270 case __I40EVF_INIT_VERSION_CHECK:
2271 if (!i40evf_asq_done(hw)) {
2272 dev_err(&pdev->dev, "Admin queue command never completed\n");
2273 i40evf_shutdown_adminq(hw);
2274 adapter->state = __I40EVF_STARTUP;
2275 goto err;
2276 }
2277
2278 /* aq msg sent, awaiting reply */
2279 err = i40evf_verify_api_ver(adapter);
2280 if (err) {
2281 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2282 err = i40evf_send_api_ver(adapter);
2283 else
2284 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
2285 adapter->pf_version.major,
2286 adapter->pf_version.minor,
2287 I40E_VIRTCHNL_VERSION_MAJOR,
2288 I40E_VIRTCHNL_VERSION_MINOR);
2289 goto err;
2290 }
2291 err = i40evf_send_vf_config_msg(adapter);
2292 if (err) {
2293 dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2294 err);
2295 goto err;
2296 }
2297 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2298 goto restart;
2299 case __I40EVF_INIT_GET_RESOURCES:
2300 /* aq msg sent, awaiting reply */
2301 if (!adapter->vf_res) {
2302 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2303 (I40E_MAX_VF_VSI *
2304 sizeof(struct i40e_virtchnl_vsi_resource));
2305 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2306 if (!adapter->vf_res)
2307 goto err;
2308 }
2309 err = i40evf_get_vf_config(adapter);
2310 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2311 err = i40evf_send_vf_config_msg(adapter);
2312 goto err;
2313 }
2314 if (err) {
2315 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2316 err);
2317 goto err_alloc;
2318 }
2319 adapter->state = __I40EVF_INIT_SW;
2320 break;
2321 default:
2322 goto err_alloc;
2323 }
2324 if (i40evf_process_config(adapter))
2325 goto err_alloc;
2326 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
2327
2328 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2329
2330 netdev->netdev_ops = &i40evf_netdev_ops;
2331 i40evf_set_ethtool_ops(netdev);
2332 netdev->watchdog_timeo = 5 * HZ;
2333
2334 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2335 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2336 adapter->hw.mac.addr);
2337 eth_hw_addr_random(netdev);
2338 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
2339 } else {
2340 adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF;
2341 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2342 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2343 }
2344
2345 init_timer(&adapter->watchdog_timer);
2346 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2347 adapter->watchdog_timer.data = (unsigned long)adapter;
2348 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2349
2350 adapter->num_active_queues = min_t(int,
2351 adapter->vsi_res->num_queue_pairs,
2352 (int)(num_online_cpus()));
2353 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2354 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2355 err = i40evf_init_interrupt_scheme(adapter);
2356 if (err)
2357 goto err_sw_init;
2358 i40evf_map_rings_to_vectors(adapter);
2359 if (adapter->vf_res->vf_offload_flags &
2360 I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
2361 adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
2362 if (!RSS_AQ(adapter))
2363 i40evf_init_rss(adapter);
2364 err = i40evf_request_misc_irq(adapter);
2365 if (err)
2366 goto err_sw_init;
2367
2368 netif_carrier_off(netdev);
2369
2370 if (!adapter->netdev_registered) {
2371 err = register_netdev(netdev);
2372 if (err)
2373 goto err_register;
2374 }
2375
2376 adapter->netdev_registered = true;
2377
2378 netif_tx_stop_all_queues(netdev);
2379
2380 dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2381 if (netdev->features & NETIF_F_GRO)
2382 dev_info(&pdev->dev, "GRO is enabled\n");
2383
2384 dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2385 adapter->state = __I40EVF_DOWN;
2386 set_bit(__I40E_DOWN, &adapter->vsi.state);
2387 i40evf_misc_irq_enable(adapter);
2388
2389 if (RSS_AQ(adapter)) {
2390 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
2391 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
2392 } else {
2393 i40evf_init_rss(adapter);
2394 }
2395 return;
2396 restart:
2397 schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
2398 return;
2399
2400 err_register:
2401 i40evf_free_misc_irq(adapter);
2402 err_sw_init:
2403 i40evf_reset_interrupt_capability(adapter);
2404 err_alloc:
2405 kfree(adapter->vf_res);
2406 adapter->vf_res = NULL;
2407 err:
2408 /* Things went into the weeds, so try again later */
2409 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2410 dev_err(&pdev->dev, "Failed to communicate with PF; waiting before retry\n");
2411 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2412 i40evf_shutdown_adminq(hw);
2413 adapter->state = __I40EVF_STARTUP;
2414 schedule_delayed_work(&adapter->init_task, HZ * 5);
2415 return;
2416 }
2417 schedule_delayed_work(&adapter->init_task, HZ);
2418 }
2419
2420 /**
2421 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2422 * @pdev: pci device structure
2423 **/
2424 static void i40evf_shutdown(struct pci_dev *pdev)
2425 {
2426 struct net_device *netdev = pci_get_drvdata(pdev);
2427 struct i40evf_adapter *adapter = netdev_priv(netdev);
2428
2429 netif_device_detach(netdev);
2430
2431 if (netif_running(netdev))
2432 i40evf_close(netdev);
2433
2434 /* Prevent the watchdog from running. */
2435 adapter->state = __I40EVF_REMOVE;
2436 adapter->aq_required = 0;
2437
2438 #ifdef CONFIG_PM
2439 pci_save_state(pdev);
2440
2441 #endif
2442 pci_disable_device(pdev);
2443 }
2444
2445 /**
2446 * i40evf_probe - Device Initialization Routine
2447 * @pdev: PCI device information struct
2448 * @ent: entry in i40evf_pci_tbl
2449 *
2450 * Returns 0 on success, negative on failure
2451 *
2452 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2453 * The OS initialization, configuring of the adapter private structure,
2454 * and a hardware reset occur.
2455 **/
2456 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2457 {
2458 struct net_device *netdev;
2459 struct i40evf_adapter *adapter = NULL;
2460 struct i40e_hw *hw = NULL;
2461 int err;
2462
2463 err = pci_enable_device(pdev);
2464 if (err)
2465 return err;
2466
2467 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2468 if (err) {
2469 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2470 if (err) {
2471 dev_err(&pdev->dev,
2472 "DMA configuration failed: 0x%x\n", err);
2473 goto err_dma;
2474 }
2475 }
2476
2477 err = pci_request_regions(pdev, i40evf_driver_name);
2478 if (err) {
2479 dev_err(&pdev->dev,
2480 "pci_request_regions failed 0x%x\n", err);
2481 goto err_pci_reg;
2482 }
2483
2484 pci_enable_pcie_error_reporting(pdev);
2485
2486 pci_set_master(pdev);
2487
2488 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2489 MAX_TX_QUEUES);
2490 if (!netdev) {
2491 err = -ENOMEM;
2492 goto err_alloc_etherdev;
2493 }
2494
2495 SET_NETDEV_DEV(netdev, &pdev->dev);
2496
2497 pci_set_drvdata(pdev, netdev);
2498 adapter = netdev_priv(netdev);
2499
2500 adapter->netdev = netdev;
2501 adapter->pdev = pdev;
2502
2503 hw = &adapter->hw;
2504 hw->back = adapter;
2505
2506 adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2507 adapter->state = __I40EVF_STARTUP;
2508
2509 /* Call save state here because it relies on the adapter struct. */
2510 pci_save_state(pdev);
2511
2512 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2513 pci_resource_len(pdev, 0));
2514 if (!hw->hw_addr) {
2515 err = -EIO;
2516 goto err_ioremap;
2517 }
2518 hw->vendor_id = pdev->vendor;
2519 hw->device_id = pdev->device;
2520 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2521 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2522 hw->subsystem_device_id = pdev->subsystem_device;
2523 hw->bus.device = PCI_SLOT(pdev->devfn);
2524 hw->bus.func = PCI_FUNC(pdev->devfn);
2525
2526 INIT_LIST_HEAD(&adapter->mac_filter_list);
2527 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2528
2529 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2530 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2531 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2532 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2533 schedule_delayed_work(&adapter->init_task,
2534 msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
2535
2536 return 0;
2537
2538 err_ioremap:
2539 free_netdev(netdev);
2540 err_alloc_etherdev:
2541 pci_release_regions(pdev);
2542 err_pci_reg:
2543 err_dma:
2544 pci_disable_device(pdev);
2545 return err;
2546 }
2547
2548 #ifdef CONFIG_PM
2549 /**
2550 * i40evf_suspend - Power management suspend routine
2551 * @pdev: PCI device information struct
2552 * @state: unused
2553 *
2554 * Called when the system (VM) is entering sleep/suspend.
2555 **/
2556 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2557 {
2558 struct net_device *netdev = pci_get_drvdata(pdev);
2559 struct i40evf_adapter *adapter = netdev_priv(netdev);
2560 int retval = 0;
2561
2562 netif_device_detach(netdev);
2563
2564 if (netif_running(netdev)) {
2565 rtnl_lock();
2566 i40evf_down(adapter);
2567 rtnl_unlock();
2568 }
2569 i40evf_free_misc_irq(adapter);
2570 i40evf_reset_interrupt_capability(adapter);
2571
2572 retval = pci_save_state(pdev);
2573 if (retval)
2574 return retval;
2575
2576 pci_disable_device(pdev);
2577
2578 return 0;
2579 }
2580
2581 /**
2582 * i40evf_resume - Power management resume routine
2583 * @pdev: PCI device information struct
2584 *
2585 * Called when the system (VM) is resumed from sleep/suspend.
2586 **/
2587 static int i40evf_resume(struct pci_dev *pdev)
2588 {
2589 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2590 struct net_device *netdev = adapter->netdev;
2591 u32 err;
2592
2593 pci_set_power_state(pdev, PCI_D0);
2594 pci_restore_state(pdev);
2595 /* pci_restore_state clears dev->state_saved so call
2596 * pci_save_state to restore it.
2597 */
2598 pci_save_state(pdev);
2599
2600 err = pci_enable_device_mem(pdev);
2601 if (err) {
2602 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2603 return err;
2604 }
2605 pci_set_master(pdev);
2606
2607 rtnl_lock();
2608 err = i40evf_set_interrupt_capability(adapter);
2609 if (err) {
2610 rtnl_unlock();
2611 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2612 return err;
2613 }
2614 err = i40evf_request_misc_irq(adapter);
2615 rtnl_unlock();
2616 if (err) {
2617 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2618 return err;
2619 }
2620
2621 schedule_work(&adapter->reset_task);
2622
2623 netif_device_attach(netdev);
2624
2625 return err;
2626 }
2627
2628 #endif /* CONFIG_PM */
2629 /**
2630 * i40evf_remove - Device Removal Routine
2631 * @pdev: PCI device information struct
2632 *
2633 * i40evf_remove is called by the PCI subsystem to alert the driver
2634 * that it should release a PCI device. The could be caused by a
2635 * Hot-Plug event, or because the driver is going to be removed from
2636 * memory.
2637 **/
2638 static void i40evf_remove(struct pci_dev *pdev)
2639 {
2640 struct net_device *netdev = pci_get_drvdata(pdev);
2641 struct i40evf_adapter *adapter = netdev_priv(netdev);
2642 struct i40evf_mac_filter *f, *ftmp;
2643 struct i40e_hw *hw = &adapter->hw;
2644
2645 cancel_delayed_work_sync(&adapter->init_task);
2646 cancel_work_sync(&adapter->reset_task);
2647
2648 if (adapter->netdev_registered) {
2649 unregister_netdev(netdev);
2650 adapter->netdev_registered = false;
2651 }
2652
2653 /* Shut down all the garbage mashers on the detention level */
2654 adapter->state = __I40EVF_REMOVE;
2655 adapter->aq_required = 0;
2656 i40evf_request_reset(adapter);
2657 msleep(20);
2658 /* If the FW isn't responding, kick it once, but only once. */
2659 if (!i40evf_asq_done(hw)) {
2660 i40evf_request_reset(adapter);
2661 msleep(20);
2662 }
2663
2664 if (adapter->msix_entries) {
2665 i40evf_misc_irq_disable(adapter);
2666 i40evf_free_misc_irq(adapter);
2667 i40evf_reset_interrupt_capability(adapter);
2668 i40evf_free_q_vectors(adapter);
2669 }
2670
2671 if (adapter->watchdog_timer.function)
2672 del_timer_sync(&adapter->watchdog_timer);
2673
2674 flush_scheduled_work();
2675
2676 if (hw->aq.asq.count)
2677 i40evf_shutdown_adminq(hw);
2678
2679 iounmap(hw->hw_addr);
2680 pci_release_regions(pdev);
2681
2682 i40evf_free_all_tx_resources(adapter);
2683 i40evf_free_all_rx_resources(adapter);
2684 i40evf_free_queues(adapter);
2685 kfree(adapter->vf_res);
2686 /* If we got removed before an up/down sequence, we've got a filter
2687 * hanging out there that we need to get rid of.
2688 */
2689 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2690 list_del(&f->list);
2691 kfree(f);
2692 }
2693 list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2694 list_del(&f->list);
2695 kfree(f);
2696 }
2697
2698 free_netdev(netdev);
2699
2700 pci_disable_pcie_error_reporting(pdev);
2701
2702 pci_disable_device(pdev);
2703 }
2704
2705 static struct pci_driver i40evf_driver = {
2706 .name = i40evf_driver_name,
2707 .id_table = i40evf_pci_tbl,
2708 .probe = i40evf_probe,
2709 .remove = i40evf_remove,
2710 #ifdef CONFIG_PM
2711 .suspend = i40evf_suspend,
2712 .resume = i40evf_resume,
2713 #endif
2714 .shutdown = i40evf_shutdown,
2715 };
2716
2717 /**
2718 * i40e_init_module - Driver Registration Routine
2719 *
2720 * i40e_init_module is the first routine called when the driver is
2721 * loaded. All it does is register with the PCI subsystem.
2722 **/
2723 static int __init i40evf_init_module(void)
2724 {
2725 int ret;
2726
2727 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2728 i40evf_driver_version);
2729
2730 pr_info("%s\n", i40evf_copyright);
2731
2732 ret = pci_register_driver(&i40evf_driver);
2733 return ret;
2734 }
2735
2736 module_init(i40evf_init_module);
2737
2738 /**
2739 * i40e_exit_module - Driver Exit Cleanup Routine
2740 *
2741 * i40e_exit_module is called just before the driver is removed
2742 * from memory.
2743 **/
2744 static void __exit i40evf_exit_module(void)
2745 {
2746 pci_unregister_driver(&i40evf_driver);
2747 }
2748
2749 module_exit(i40evf_exit_module);
2750
2751 /* i40evf_main.c */
Linux kernel - Deliverables
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