projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
i40evf: create a generic get RSS function
[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_get_rss_aq - Get RSS keys and lut by using AQ commands
1304 * @vsi: Pointer to vsi structure
1305 * @seed: RSS hash seed
1306 * @lut: Lookup table
1307 * @lut_size: Lookup table size
1308 *
1309 * Return 0 on success, negative on failure
1310 **/
1311 static int i40evf_get_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
1312 u8 *lut, u16 lut_size)
1313 {
1314 struct i40evf_adapter *adapter = vsi->back;
1315 struct i40e_hw *hw = &adapter->hw;
1316 int ret = 0;
1317
1318 if (seed) {
1319 ret = i40evf_aq_get_rss_key(hw, vsi->id,
1320 (struct i40e_aqc_get_set_rss_key_data *)seed);
1321 if (ret) {
1322 dev_err(&adapter->pdev->dev,
1323 "Cannot get RSS key, err %s aq_err %s\n",
1324 i40evf_stat_str(hw, ret),
1325 i40evf_aq_str(hw, hw->aq.asq_last_status));
1326 return ret;
1327 }
1328 }
1329
1330 if (lut) {
1331 ret = i40evf_aq_get_rss_lut(hw, vsi->id, seed, lut, lut_size);
1332 if (ret) {
1333 dev_err(&adapter->pdev->dev,
1334 "Cannot get RSS lut, err %s aq_err %s\n",
1335 i40evf_stat_str(hw, ret),
1336 i40evf_aq_str(hw, hw->aq.asq_last_status));
1337 return ret;
1338 }
1339 }
1340
1341 return ret;
1342 }
1343
1344 /**
1345 * * i40evf_get_rss_reg - Get RSS keys and lut by reading registers
1346 * @vsi: Pointer to vsi structure
1347 * @seed: RSS hash seed
1348 * @lut: Lookup table
1349 * @lut_size: Lookup table size
1350 *
1351 * Returns 0 on success, negative on failure
1352 **/
1353 static int i40evf_get_rss_reg(struct i40e_vsi *vsi, const u8 *seed,
1354 const u8 *lut, u16 lut_size)
1355 {
1356 struct i40evf_adapter *adapter = vsi->back;
1357 struct i40e_hw *hw = &adapter->hw;
1358 u16 i;
1359
1360 if (seed) {
1361 u32 *seed_dw = (u32 *)seed;
1362
1363 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1364 seed_dw[i] = rd32(hw, I40E_VFQF_HKEY(i));
1365 }
1366
1367 if (lut) {
1368 u32 *lut_dw = (u32 *)lut;
1369
1370 if (lut_size != I40EVF_HLUT_ARRAY_SIZE)
1371 return -EINVAL;
1372
1373 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++)
1374 lut_dw[i] = rd32(hw, I40E_VFQF_HLUT(i));
1375 }
1376
1377 return 0;
1378 }
1379
1380 /**
1381 * i40evf_config_rss - Configure RSS keys and lut
1382 * @vsi: Pointer to vsi structure
1383 * @seed: RSS hash seed
1384 * @lut: Lookup table
1385 * @lut_size: Lookup table size
1386 *
1387 * Returns 0 on success, negative on failure
1388 **/
1389 int i40evf_config_rss(struct i40e_vsi *vsi, const u8 *seed,
1390 u8 *lut, u16 lut_size)
1391 {
1392 struct i40evf_adapter *adapter = vsi->back;
1393
1394 if (RSS_AQ(adapter))
1395 return i40evf_config_rss_aq(vsi, seed, lut, lut_size);
1396 else
1397 return i40evf_config_rss_reg(vsi, seed, lut, lut_size);
1398 }
1399
1400 /**
1401 * i40evf_get_rss - Get RSS keys and lut
1402 * @vsi: Pointer to vsi structure
1403 * @seed: RSS hash seed
1404 * @lut: Lookup table
1405 * @lut_size: Lookup table size
1406 *
1407 * Returns 0 on success, negative on failure
1408 **/
1409 int i40evf_get_rss(struct i40e_vsi *vsi, const u8 *seed, u8 *lut, u16 lut_size)
1410 {
1411 struct i40evf_adapter *adapter = vsi->back;
1412
1413 if (RSS_AQ(adapter))
1414 return i40evf_get_rss_aq(vsi, seed, lut, lut_size);
1415 else
1416 return i40evf_get_rss_reg(vsi, seed, lut, lut_size);
1417 }
1418
1419 /**
1420 * i40evf_fill_rss_lut - Fill the lut with default values
1421 * @lut: Lookup table to be filled with
1422 * @rss_table_size: Lookup table size
1423 * @rss_size: Range of queue number for hashing
1424 **/
1425 static void i40evf_fill_rss_lut(u8 *lut, u16 rss_table_size, u16 rss_size)
1426 {
1427 u16 i;
1428
1429 for (i = 0; i < rss_table_size; i++)
1430 lut[i] = i % rss_size;
1431 }
1432
1433 /**
1434 * i40evf_init_rss - Prepare for RSS
1435 * @adapter: board private structure
1436 *
1437 * Return 0 on success, negative on failure
1438 **/
1439 static int i40evf_init_rss(struct i40evf_adapter *adapter)
1440 {
1441 struct i40e_vsi *vsi = &adapter->vsi;
1442 struct i40e_hw *hw = &adapter->hw;
1443 u8 seed[I40EVF_HKEY_ARRAY_SIZE];
1444 u64 hena;
1445 u8 *lut;
1446 int ret;
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 lut = kzalloc(I40EVF_HLUT_ARRAY_SIZE, GFP_KERNEL);
1454 if (!lut)
1455 return -ENOMEM;
1456 i40evf_fill_rss_lut(lut, I40EVF_HLUT_ARRAY_SIZE,
1457 adapter->num_active_queues);
1458 netdev_rss_key_fill((void *)seed, I40EVF_HKEY_ARRAY_SIZE);
1459 ret = i40evf_config_rss(vsi, seed, lut, I40EVF_HLUT_ARRAY_SIZE);
1460 kfree(lut);
1461
1462 return ret;
1463 }
1464
1465 /**
1466 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1467 * @adapter: board private structure to initialize
1468 *
1469 * We allocate one q_vector per queue interrupt. If allocation fails we
1470 * return -ENOMEM.
1471 **/
1472 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1473 {
1474 int q_idx, num_q_vectors;
1475 struct i40e_q_vector *q_vector;
1476
1477 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1478
1479 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1480 q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL);
1481 if (!q_vector)
1482 goto err_out;
1483 q_vector->adapter = adapter;
1484 q_vector->vsi = &adapter->vsi;
1485 q_vector->v_idx = q_idx;
1486 netif_napi_add(adapter->netdev, &q_vector->napi,
1487 i40evf_napi_poll, NAPI_POLL_WEIGHT);
1488 adapter->q_vector[q_idx] = q_vector;
1489 }
1490
1491 return 0;
1492
1493 err_out:
1494 while (q_idx) {
1495 q_idx--;
1496 q_vector = adapter->q_vector[q_idx];
1497 netif_napi_del(&q_vector->napi);
1498 kfree(q_vector);
1499 adapter->q_vector[q_idx] = NULL;
1500 }
1501 return -ENOMEM;
1502 }
1503
1504 /**
1505 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1506 * @adapter: board private structure to initialize
1507 *
1508 * This function frees the memory allocated to the q_vectors. In addition if
1509 * NAPI is enabled it will delete any references to the NAPI struct prior
1510 * to freeing the q_vector.
1511 **/
1512 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1513 {
1514 int q_idx, num_q_vectors;
1515 int napi_vectors;
1516
1517 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1518 napi_vectors = adapter->num_active_queues;
1519
1520 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1521 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1522
1523 adapter->q_vector[q_idx] = NULL;
1524 if (q_idx < napi_vectors)
1525 netif_napi_del(&q_vector->napi);
1526 kfree(q_vector);
1527 }
1528 }
1529
1530 /**
1531 * i40evf_reset_interrupt_capability - Reset MSIX setup
1532 * @adapter: board private structure
1533 *
1534 **/
1535 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1536 {
1537 pci_disable_msix(adapter->pdev);
1538 kfree(adapter->msix_entries);
1539 adapter->msix_entries = NULL;
1540 }
1541
1542 /**
1543 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1544 * @adapter: board private structure to initialize
1545 *
1546 **/
1547 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1548 {
1549 int err;
1550
1551 err = i40evf_set_interrupt_capability(adapter);
1552 if (err) {
1553 dev_err(&adapter->pdev->dev,
1554 "Unable to setup interrupt capabilities\n");
1555 goto err_set_interrupt;
1556 }
1557
1558 err = i40evf_alloc_q_vectors(adapter);
1559 if (err) {
1560 dev_err(&adapter->pdev->dev,
1561 "Unable to allocate memory for queue vectors\n");
1562 goto err_alloc_q_vectors;
1563 }
1564
1565 err = i40evf_alloc_queues(adapter);
1566 if (err) {
1567 dev_err(&adapter->pdev->dev,
1568 "Unable to allocate memory for queues\n");
1569 goto err_alloc_queues;
1570 }
1571
1572 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1573 (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1574 adapter->num_active_queues);
1575
1576 return 0;
1577 err_alloc_queues:
1578 i40evf_free_q_vectors(adapter);
1579 err_alloc_q_vectors:
1580 i40evf_reset_interrupt_capability(adapter);
1581 err_set_interrupt:
1582 return err;
1583 }
1584
1585 /**
1586 * i40evf_watchdog_timer - Periodic call-back timer
1587 * @data: pointer to adapter disguised as unsigned long
1588 **/
1589 static void i40evf_watchdog_timer(unsigned long data)
1590 {
1591 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1592
1593 schedule_work(&adapter->watchdog_task);
1594 /* timer will be rescheduled in watchdog task */
1595 }
1596
1597 /**
1598 * i40evf_watchdog_task - Periodic call-back task
1599 * @work: pointer to work_struct
1600 **/
1601 static void i40evf_watchdog_task(struct work_struct *work)
1602 {
1603 struct i40evf_adapter *adapter = container_of(work,
1604 struct i40evf_adapter,
1605 watchdog_task);
1606 struct i40e_hw *hw = &adapter->hw;
1607 u32 reg_val;
1608
1609 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1610 goto restart_watchdog;
1611
1612 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1613 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1614 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1615 if ((reg_val == I40E_VFR_VFACTIVE) ||
1616 (reg_val == I40E_VFR_COMPLETED)) {
1617 /* A chance for redemption! */
1618 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1619 adapter->state = __I40EVF_STARTUP;
1620 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1621 schedule_delayed_work(&adapter->init_task, 10);
1622 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1623 &adapter->crit_section);
1624 /* Don't reschedule the watchdog, since we've restarted
1625 * the init task. When init_task contacts the PF and
1626 * gets everything set up again, it'll restart the
1627 * watchdog for us. Down, boy. Sit. Stay. Woof.
1628 */
1629 return;
1630 }
1631 adapter->aq_required = 0;
1632 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1633 goto watchdog_done;
1634 }
1635
1636 if ((adapter->state < __I40EVF_DOWN) ||
1637 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1638 goto watchdog_done;
1639
1640 /* check for reset */
1641 reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
1642 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
1643 adapter->state = __I40EVF_RESETTING;
1644 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1645 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1646 schedule_work(&adapter->reset_task);
1647 adapter->aq_required = 0;
1648 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1649 goto watchdog_done;
1650 }
1651
1652 /* Process admin queue tasks. After init, everything gets done
1653 * here so we don't race on the admin queue.
1654 */
1655 if (adapter->current_op) {
1656 if (!i40evf_asq_done(hw)) {
1657 dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1658 i40evf_send_api_ver(adapter);
1659 }
1660 goto watchdog_done;
1661 }
1662 if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
1663 i40evf_send_vf_config_msg(adapter);
1664 goto watchdog_done;
1665 }
1666
1667 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1668 i40evf_disable_queues(adapter);
1669 goto watchdog_done;
1670 }
1671
1672 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1673 i40evf_map_queues(adapter);
1674 goto watchdog_done;
1675 }
1676
1677 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1678 i40evf_add_ether_addrs(adapter);
1679 goto watchdog_done;
1680 }
1681
1682 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1683 i40evf_add_vlans(adapter);
1684 goto watchdog_done;
1685 }
1686
1687 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1688 i40evf_del_ether_addrs(adapter);
1689 goto watchdog_done;
1690 }
1691
1692 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1693 i40evf_del_vlans(adapter);
1694 goto watchdog_done;
1695 }
1696
1697 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1698 i40evf_configure_queues(adapter);
1699 goto watchdog_done;
1700 }
1701
1702 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1703 i40evf_enable_queues(adapter);
1704 goto watchdog_done;
1705 }
1706
1707 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
1708 /* This message goes straight to the firmware, not the
1709 * PF, so we don't have to set current_op as we will
1710 * not get a response through the ARQ.
1711 */
1712 i40evf_init_rss(adapter);
1713 adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
1714 goto watchdog_done;
1715 }
1716
1717 if (adapter->state == __I40EVF_RUNNING)
1718 i40evf_request_stats(adapter);
1719 watchdog_done:
1720 if (adapter->state == __I40EVF_RUNNING) {
1721 i40evf_irq_enable_queues(adapter, ~0);
1722 i40evf_fire_sw_int(adapter, 0xFF);
1723 } else {
1724 i40evf_fire_sw_int(adapter, 0x1);
1725 }
1726
1727 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1728 restart_watchdog:
1729 if (adapter->state == __I40EVF_REMOVE)
1730 return;
1731 if (adapter->aq_required)
1732 mod_timer(&adapter->watchdog_timer,
1733 jiffies + msecs_to_jiffies(20));
1734 else
1735 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1736 schedule_work(&adapter->adminq_task);
1737 }
1738
1739 #define I40EVF_RESET_WAIT_MS 10
1740 #define I40EVF_RESET_WAIT_COUNT 500
1741 /**
1742 * i40evf_reset_task - Call-back task to handle hardware reset
1743 * @work: pointer to work_struct
1744 *
1745 * During reset we need to shut down and reinitialize the admin queue
1746 * before we can use it to communicate with the PF again. We also clear
1747 * and reinit the rings because that context is lost as well.
1748 **/
1749 static void i40evf_reset_task(struct work_struct *work)
1750 {
1751 struct i40evf_adapter *adapter = container_of(work,
1752 struct i40evf_adapter,
1753 reset_task);
1754 struct net_device *netdev = adapter->netdev;
1755 struct i40e_hw *hw = &adapter->hw;
1756 struct i40evf_vlan_filter *vlf;
1757 struct i40evf_mac_filter *f;
1758 u32 reg_val;
1759 int i = 0, err;
1760
1761 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1762 &adapter->crit_section))
1763 usleep_range(500, 1000);
1764
1765 i40evf_misc_irq_disable(adapter);
1766 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1767 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1768 /* Restart the AQ here. If we have been reset but didn't
1769 * detect it, or if the PF had to reinit, our AQ will be hosed.
1770 */
1771 i40evf_shutdown_adminq(hw);
1772 i40evf_init_adminq(hw);
1773 i40evf_request_reset(adapter);
1774 }
1775 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1776
1777 /* poll until we see the reset actually happen */
1778 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1779 reg_val = rd32(hw, I40E_VF_ARQLEN1) &
1780 I40E_VF_ARQLEN1_ARQENABLE_MASK;
1781 if (!reg_val)
1782 break;
1783 usleep_range(5000, 10000);
1784 }
1785 if (i == I40EVF_RESET_WAIT_COUNT) {
1786 dev_info(&adapter->pdev->dev, "Never saw reset\n");
1787 goto continue_reset; /* act like the reset happened */
1788 }
1789
1790 /* wait until the reset is complete and the PF is responding to us */
1791 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1792 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1793 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1794 if (reg_val == I40E_VFR_VFACTIVE)
1795 break;
1796 msleep(I40EVF_RESET_WAIT_MS);
1797 }
1798 /* extra wait to make sure minimum wait is met */
1799 msleep(I40EVF_RESET_WAIT_MS);
1800 if (i == I40EVF_RESET_WAIT_COUNT) {
1801 struct i40evf_mac_filter *ftmp;
1802 struct i40evf_vlan_filter *fv, *fvtmp;
1803
1804 /* reset never finished */
1805 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1806 reg_val);
1807 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1808
1809 if (netif_running(adapter->netdev)) {
1810 set_bit(__I40E_DOWN, &adapter->vsi.state);
1811 netif_carrier_off(netdev);
1812 netif_tx_disable(netdev);
1813 i40evf_napi_disable_all(adapter);
1814 i40evf_irq_disable(adapter);
1815 i40evf_free_traffic_irqs(adapter);
1816 i40evf_free_all_tx_resources(adapter);
1817 i40evf_free_all_rx_resources(adapter);
1818 }
1819
1820 /* Delete all of the filters, both MAC and VLAN. */
1821 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1822 list) {
1823 list_del(&f->list);
1824 kfree(f);
1825 }
1826
1827 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1828 list) {
1829 list_del(&fv->list);
1830 kfree(fv);
1831 }
1832
1833 i40evf_free_misc_irq(adapter);
1834 i40evf_reset_interrupt_capability(adapter);
1835 i40evf_free_queues(adapter);
1836 i40evf_free_q_vectors(adapter);
1837 kfree(adapter->vf_res);
1838 i40evf_shutdown_adminq(hw);
1839 adapter->netdev->flags &= ~IFF_UP;
1840 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1841 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1842 dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
1843 return; /* Do not attempt to reinit. It's dead, Jim. */
1844 }
1845
1846 continue_reset:
1847 if (netif_running(adapter->netdev)) {
1848 netif_carrier_off(netdev);
1849 netif_tx_stop_all_queues(netdev);
1850 i40evf_napi_disable_all(adapter);
1851 }
1852 i40evf_irq_disable(adapter);
1853
1854 adapter->state = __I40EVF_RESETTING;
1855 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1856
1857 /* free the Tx/Rx rings and descriptors, might be better to just
1858 * re-use them sometime in the future
1859 */
1860 i40evf_free_all_rx_resources(adapter);
1861 i40evf_free_all_tx_resources(adapter);
1862
1863 /* kill and reinit the admin queue */
1864 if (i40evf_shutdown_adminq(hw))
1865 dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
1866 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1867 err = i40evf_init_adminq(hw);
1868 if (err)
1869 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1870 err);
1871
1872 adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG;
1873 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
1874
1875 /* re-add all MAC filters */
1876 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1877 f->add = true;
1878 }
1879 /* re-add all VLAN filters */
1880 list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
1881 vlf->add = true;
1882 }
1883 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1884 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1885 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1886 i40evf_misc_irq_enable(adapter);
1887
1888 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1889
1890 if (netif_running(adapter->netdev)) {
1891 /* allocate transmit descriptors */
1892 err = i40evf_setup_all_tx_resources(adapter);
1893 if (err)
1894 goto reset_err;
1895
1896 /* allocate receive descriptors */
1897 err = i40evf_setup_all_rx_resources(adapter);
1898 if (err)
1899 goto reset_err;
1900
1901 i40evf_configure(adapter);
1902
1903 err = i40evf_up_complete(adapter);
1904 if (err)
1905 goto reset_err;
1906
1907 i40evf_irq_enable(adapter, true);
1908 } else {
1909 adapter->state = __I40EVF_DOWN;
1910 }
1911
1912 return;
1913 reset_err:
1914 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1915 i40evf_close(adapter->netdev);
1916 }
1917
1918 /**
1919 * i40evf_adminq_task - worker thread to clean the admin queue
1920 * @work: pointer to work_struct containing our data
1921 **/
1922 static void i40evf_adminq_task(struct work_struct *work)
1923 {
1924 struct i40evf_adapter *adapter =
1925 container_of(work, struct i40evf_adapter, adminq_task);
1926 struct i40e_hw *hw = &adapter->hw;
1927 struct i40e_arq_event_info event;
1928 struct i40e_virtchnl_msg *v_msg;
1929 i40e_status ret;
1930 u32 val, oldval;
1931 u16 pending;
1932
1933 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1934 goto out;
1935
1936 event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1937 event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1938 if (!event.msg_buf)
1939 goto out;
1940
1941 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1942 do {
1943 ret = i40evf_clean_arq_element(hw, &event, &pending);
1944 if (ret || !v_msg->v_opcode)
1945 break; /* No event to process or error cleaning ARQ */
1946
1947 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1948 v_msg->v_retval, event.msg_buf,
1949 event.msg_len);
1950 if (pending != 0)
1951 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1952 } while (pending);
1953
1954 if ((adapter->flags &
1955 (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
1956 adapter->state == __I40EVF_RESETTING)
1957 goto freedom;
1958
1959 /* check for error indications */
1960 val = rd32(hw, hw->aq.arq.len);
1961 oldval = val;
1962 if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
1963 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1964 val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
1965 }
1966 if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
1967 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1968 val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
1969 }
1970 if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
1971 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1972 val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
1973 }
1974 if (oldval != val)
1975 wr32(hw, hw->aq.arq.len, val);
1976
1977 val = rd32(hw, hw->aq.asq.len);
1978 oldval = val;
1979 if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
1980 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1981 val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
1982 }
1983 if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
1984 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1985 val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
1986 }
1987 if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
1988 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1989 val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
1990 }
1991 if (oldval != val)
1992 wr32(hw, hw->aq.asq.len, val);
1993
1994 freedom:
1995 kfree(event.msg_buf);
1996 out:
1997 /* re-enable Admin queue interrupt cause */
1998 i40evf_misc_irq_enable(adapter);
1999 }
2000
2001 /**
2002 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
2003 * @adapter: board private structure
2004 *
2005 * Free all transmit software resources
2006 **/
2007 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
2008 {
2009 int i;
2010
2011 for (i = 0; i < adapter->num_active_queues; i++)
2012 if (adapter->tx_rings[i]->desc)
2013 i40evf_free_tx_resources(adapter->tx_rings[i]);
2014 }
2015
2016 /**
2017 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
2018 * @adapter: board private structure
2019 *
2020 * If this function returns with an error, then it's possible one or
2021 * more of the rings is populated (while the rest are not). It is the
2022 * callers duty to clean those orphaned rings.
2023 *
2024 * Return 0 on success, negative on failure
2025 **/
2026 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
2027 {
2028 int i, err = 0;
2029
2030 for (i = 0; i < adapter->num_active_queues; i++) {
2031 adapter->tx_rings[i]->count = adapter->tx_desc_count;
2032 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
2033 if (!err)
2034 continue;
2035 dev_err(&adapter->pdev->dev,
2036 "Allocation for Tx Queue %u failed\n", i);
2037 break;
2038 }
2039
2040 return err;
2041 }
2042
2043 /**
2044 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
2045 * @adapter: board private structure
2046 *
2047 * If this function returns with an error, then it's possible one or
2048 * more of the rings is populated (while the rest are not). It is the
2049 * callers duty to clean those orphaned rings.
2050 *
2051 * Return 0 on success, negative on failure
2052 **/
2053 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
2054 {
2055 int i, err = 0;
2056
2057 for (i = 0; i < adapter->num_active_queues; i++) {
2058 adapter->rx_rings[i]->count = adapter->rx_desc_count;
2059 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
2060 if (!err)
2061 continue;
2062 dev_err(&adapter->pdev->dev,
2063 "Allocation for Rx Queue %u failed\n", i);
2064 break;
2065 }
2066 return err;
2067 }
2068
2069 /**
2070 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
2071 * @adapter: board private structure
2072 *
2073 * Free all receive software resources
2074 **/
2075 void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
2076 {
2077 int i;
2078
2079 for (i = 0; i < adapter->num_active_queues; i++)
2080 if (adapter->rx_rings[i]->desc)
2081 i40evf_free_rx_resources(adapter->rx_rings[i]);
2082 }
2083
2084 /**
2085 * i40evf_open - Called when a network interface is made active
2086 * @netdev: network interface device structure
2087 *
2088 * Returns 0 on success, negative value on failure
2089 *
2090 * The open entry point is called when a network interface is made
2091 * active by the system (IFF_UP). At this point all resources needed
2092 * for transmit and receive operations are allocated, the interrupt
2093 * handler is registered with the OS, the watchdog timer is started,
2094 * and the stack is notified that the interface is ready.
2095 **/
2096 static int i40evf_open(struct net_device *netdev)
2097 {
2098 struct i40evf_adapter *adapter = netdev_priv(netdev);
2099 int err;
2100
2101 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
2102 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
2103 return -EIO;
2104 }
2105 if (adapter->state != __I40EVF_DOWN || adapter->aq_required)
2106 return -EBUSY;
2107
2108 /* allocate transmit descriptors */
2109 err = i40evf_setup_all_tx_resources(adapter);
2110 if (err)
2111 goto err_setup_tx;
2112
2113 /* allocate receive descriptors */
2114 err = i40evf_setup_all_rx_resources(adapter);
2115 if (err)
2116 goto err_setup_rx;
2117
2118 /* clear any pending interrupts, may auto mask */
2119 err = i40evf_request_traffic_irqs(adapter, netdev->name);
2120 if (err)
2121 goto err_req_irq;
2122
2123 i40evf_add_filter(adapter, adapter->hw.mac.addr);
2124 i40evf_configure(adapter);
2125
2126 err = i40evf_up_complete(adapter);
2127 if (err)
2128 goto err_req_irq;
2129
2130 i40evf_irq_enable(adapter, true);
2131
2132 return 0;
2133
2134 err_req_irq:
2135 i40evf_down(adapter);
2136 i40evf_free_traffic_irqs(adapter);
2137 err_setup_rx:
2138 i40evf_free_all_rx_resources(adapter);
2139 err_setup_tx:
2140 i40evf_free_all_tx_resources(adapter);
2141
2142 return err;
2143 }
2144
2145 /**
2146 * i40evf_close - Disables a network interface
2147 * @netdev: network interface device structure
2148 *
2149 * Returns 0, this is not allowed to fail
2150 *
2151 * The close entry point is called when an interface is de-activated
2152 * by the OS. The hardware is still under the drivers control, but
2153 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
2154 * are freed, along with all transmit and receive resources.
2155 **/
2156 static int i40evf_close(struct net_device *netdev)
2157 {
2158 struct i40evf_adapter *adapter = netdev_priv(netdev);
2159
2160 if (adapter->state <= __I40EVF_DOWN)
2161 return 0;
2162
2163
2164 set_bit(__I40E_DOWN, &adapter->vsi.state);
2165
2166 i40evf_down(adapter);
2167 adapter->state = __I40EVF_DOWN;
2168 i40evf_free_traffic_irqs(adapter);
2169
2170 return 0;
2171 }
2172
2173 /**
2174 * i40evf_get_stats - Get System Network Statistics
2175 * @netdev: network interface device structure
2176 *
2177 * Returns the address of the device statistics structure.
2178 * The statistics are actually updated from the timer callback.
2179 **/
2180 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
2181 {
2182 struct i40evf_adapter *adapter = netdev_priv(netdev);
2183
2184 /* only return the current stats */
2185 return &adapter->net_stats;
2186 }
2187
2188 /**
2189 * i40evf_change_mtu - Change the Maximum Transfer Unit
2190 * @netdev: network interface device structure
2191 * @new_mtu: new value for maximum frame size
2192 *
2193 * Returns 0 on success, negative on failure
2194 **/
2195 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
2196 {
2197 struct i40evf_adapter *adapter = netdev_priv(netdev);
2198 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2199
2200 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
2201 return -EINVAL;
2202
2203 netdev->mtu = new_mtu;
2204 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
2205 schedule_work(&adapter->reset_task);
2206
2207 return 0;
2208 }
2209
2210 static const struct net_device_ops i40evf_netdev_ops = {
2211 .ndo_open = i40evf_open,
2212 .ndo_stop = i40evf_close,
2213 .ndo_start_xmit = i40evf_xmit_frame,
2214 .ndo_get_stats = i40evf_get_stats,
2215 .ndo_set_rx_mode = i40evf_set_rx_mode,
2216 .ndo_validate_addr = eth_validate_addr,
2217 .ndo_set_mac_address = i40evf_set_mac,
2218 .ndo_change_mtu = i40evf_change_mtu,
2219 .ndo_tx_timeout = i40evf_tx_timeout,
2220 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
2221 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
2222 #ifdef CONFIG_NET_POLL_CONTROLLER
2223 .ndo_poll_controller = i40evf_netpoll,
2224 #endif
2225 };
2226
2227 /**
2228 * i40evf_check_reset_complete - check that VF reset is complete
2229 * @hw: pointer to hw struct
2230 *
2231 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
2232 **/
2233 static int i40evf_check_reset_complete(struct i40e_hw *hw)
2234 {
2235 u32 rstat;
2236 int i;
2237
2238 for (i = 0; i < 100; i++) {
2239 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
2240 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
2241 if ((rstat == I40E_VFR_VFACTIVE) ||
2242 (rstat == I40E_VFR_COMPLETED))
2243 return 0;
2244 usleep_range(10, 20);
2245 }
2246 return -EBUSY;
2247 }
2248
2249 /**
2250 * i40evf_process_config - Process the config information we got from the PF
2251 * @adapter: board private structure
2252 *
2253 * Verify that we have a valid config struct, and set up our netdev features
2254 * and our VSI struct.
2255 **/
2256 int i40evf_process_config(struct i40evf_adapter *adapter)
2257 {
2258 struct net_device *netdev = adapter->netdev;
2259 int i;
2260
2261 /* got VF config message back from PF, now we can parse it */
2262 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2263 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2264 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2265 }
2266 if (!adapter->vsi_res) {
2267 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
2268 return -ENODEV;
2269 }
2270
2271 if (adapter->vf_res->vf_offload_flags
2272 & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2273 netdev->vlan_features = netdev->features &
2274 ~(NETIF_F_HW_VLAN_CTAG_TX |
2275 NETIF_F_HW_VLAN_CTAG_RX |
2276 NETIF_F_HW_VLAN_CTAG_FILTER);
2277 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2278 NETIF_F_HW_VLAN_CTAG_RX |
2279 NETIF_F_HW_VLAN_CTAG_FILTER;
2280 }
2281 netdev->features |= NETIF_F_HIGHDMA |
2282 NETIF_F_SG |
2283 NETIF_F_IP_CSUM |
2284 NETIF_F_SCTP_CSUM |
2285 NETIF_F_IPV6_CSUM |
2286 NETIF_F_TSO |
2287 NETIF_F_TSO6 |
2288 NETIF_F_RXCSUM |
2289 NETIF_F_GRO;
2290
2291 /* copy netdev features into list of user selectable features */
2292 netdev->hw_features |= netdev->features;
2293 netdev->hw_features &= ~NETIF_F_RXCSUM;
2294
2295 adapter->vsi.id = adapter->vsi_res->vsi_id;
2296
2297 adapter->vsi.back = adapter;
2298 adapter->vsi.base_vector = 1;
2299 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2300 adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2301 ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2302 adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2303 ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2304 adapter->vsi.netdev = adapter->netdev;
2305 adapter->vsi.qs_handle = adapter->vsi_res->qset_handle;
2306 return 0;
2307 }
2308
2309 /**
2310 * i40evf_init_task - worker thread to perform delayed initialization
2311 * @work: pointer to work_struct containing our data
2312 *
2313 * This task completes the work that was begun in probe. Due to the nature
2314 * of VF-PF communications, we may need to wait tens of milliseconds to get
2315 * responses back from the PF. Rather than busy-wait in probe and bog down the
2316 * whole system, we'll do it in a task so we can sleep.
2317 * This task only runs during driver init. Once we've established
2318 * communications with the PF driver and set up our netdev, the watchdog
2319 * takes over.
2320 **/
2321 static void i40evf_init_task(struct work_struct *work)
2322 {
2323 struct i40evf_adapter *adapter = container_of(work,
2324 struct i40evf_adapter,
2325 init_task.work);
2326 struct net_device *netdev = adapter->netdev;
2327 struct i40e_hw *hw = &adapter->hw;
2328 struct pci_dev *pdev = adapter->pdev;
2329 int err, bufsz;
2330
2331 switch (adapter->state) {
2332 case __I40EVF_STARTUP:
2333 /* driver loaded, probe complete */
2334 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2335 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2336 err = i40e_set_mac_type(hw);
2337 if (err) {
2338 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2339 err);
2340 goto err;
2341 }
2342 err = i40evf_check_reset_complete(hw);
2343 if (err) {
2344 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2345 err);
2346 goto err;
2347 }
2348 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2349 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2350 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2351 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2352
2353 err = i40evf_init_adminq(hw);
2354 if (err) {
2355 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2356 err);
2357 goto err;
2358 }
2359 err = i40evf_send_api_ver(adapter);
2360 if (err) {
2361 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2362 i40evf_shutdown_adminq(hw);
2363 goto err;
2364 }
2365 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2366 goto restart;
2367 case __I40EVF_INIT_VERSION_CHECK:
2368 if (!i40evf_asq_done(hw)) {
2369 dev_err(&pdev->dev, "Admin queue command never completed\n");
2370 i40evf_shutdown_adminq(hw);
2371 adapter->state = __I40EVF_STARTUP;
2372 goto err;
2373 }
2374
2375 /* aq msg sent, awaiting reply */
2376 err = i40evf_verify_api_ver(adapter);
2377 if (err) {
2378 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2379 err = i40evf_send_api_ver(adapter);
2380 else
2381 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
2382 adapter->pf_version.major,
2383 adapter->pf_version.minor,
2384 I40E_VIRTCHNL_VERSION_MAJOR,
2385 I40E_VIRTCHNL_VERSION_MINOR);
2386 goto err;
2387 }
2388 err = i40evf_send_vf_config_msg(adapter);
2389 if (err) {
2390 dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2391 err);
2392 goto err;
2393 }
2394 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2395 goto restart;
2396 case __I40EVF_INIT_GET_RESOURCES:
2397 /* aq msg sent, awaiting reply */
2398 if (!adapter->vf_res) {
2399 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2400 (I40E_MAX_VF_VSI *
2401 sizeof(struct i40e_virtchnl_vsi_resource));
2402 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2403 if (!adapter->vf_res)
2404 goto err;
2405 }
2406 err = i40evf_get_vf_config(adapter);
2407 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2408 err = i40evf_send_vf_config_msg(adapter);
2409 goto err;
2410 }
2411 if (err) {
2412 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2413 err);
2414 goto err_alloc;
2415 }
2416 adapter->state = __I40EVF_INIT_SW;
2417 break;
2418 default:
2419 goto err_alloc;
2420 }
2421 if (i40evf_process_config(adapter))
2422 goto err_alloc;
2423 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
2424
2425 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2426
2427 netdev->netdev_ops = &i40evf_netdev_ops;
2428 i40evf_set_ethtool_ops(netdev);
2429 netdev->watchdog_timeo = 5 * HZ;
2430
2431 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2432 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2433 adapter->hw.mac.addr);
2434 eth_hw_addr_random(netdev);
2435 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
2436 } else {
2437 adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF;
2438 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2439 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2440 }
2441
2442 init_timer(&adapter->watchdog_timer);
2443 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2444 adapter->watchdog_timer.data = (unsigned long)adapter;
2445 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2446
2447 adapter->num_active_queues = min_t(int,
2448 adapter->vsi_res->num_queue_pairs,
2449 (int)(num_online_cpus()));
2450 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2451 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2452 err = i40evf_init_interrupt_scheme(adapter);
2453 if (err)
2454 goto err_sw_init;
2455 i40evf_map_rings_to_vectors(adapter);
2456 if (adapter->vf_res->vf_offload_flags &
2457 I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
2458 adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
2459 if (!RSS_AQ(adapter))
2460 i40evf_init_rss(adapter);
2461 err = i40evf_request_misc_irq(adapter);
2462 if (err)
2463 goto err_sw_init;
2464
2465 netif_carrier_off(netdev);
2466
2467 if (!adapter->netdev_registered) {
2468 err = register_netdev(netdev);
2469 if (err)
2470 goto err_register;
2471 }
2472
2473 adapter->netdev_registered = true;
2474
2475 netif_tx_stop_all_queues(netdev);
2476
2477 dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2478 if (netdev->features & NETIF_F_GRO)
2479 dev_info(&pdev->dev, "GRO is enabled\n");
2480
2481 dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2482 adapter->state = __I40EVF_DOWN;
2483 set_bit(__I40E_DOWN, &adapter->vsi.state);
2484 i40evf_misc_irq_enable(adapter);
2485
2486 if (RSS_AQ(adapter)) {
2487 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
2488 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
2489 } else {
2490 i40evf_init_rss(adapter);
2491 }
2492 return;
2493 restart:
2494 schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
2495 return;
2496
2497 err_register:
2498 i40evf_free_misc_irq(adapter);
2499 err_sw_init:
2500 i40evf_reset_interrupt_capability(adapter);
2501 err_alloc:
2502 kfree(adapter->vf_res);
2503 adapter->vf_res = NULL;
2504 err:
2505 /* Things went into the weeds, so try again later */
2506 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2507 dev_err(&pdev->dev, "Failed to communicate with PF; waiting before retry\n");
2508 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2509 i40evf_shutdown_adminq(hw);
2510 adapter->state = __I40EVF_STARTUP;
2511 schedule_delayed_work(&adapter->init_task, HZ * 5);
2512 return;
2513 }
2514 schedule_delayed_work(&adapter->init_task, HZ);
2515 }
2516
2517 /**
2518 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2519 * @pdev: pci device structure
2520 **/
2521 static void i40evf_shutdown(struct pci_dev *pdev)
2522 {
2523 struct net_device *netdev = pci_get_drvdata(pdev);
2524 struct i40evf_adapter *adapter = netdev_priv(netdev);
2525
2526 netif_device_detach(netdev);
2527
2528 if (netif_running(netdev))
2529 i40evf_close(netdev);
2530
2531 /* Prevent the watchdog from running. */
2532 adapter->state = __I40EVF_REMOVE;
2533 adapter->aq_required = 0;
2534
2535 #ifdef CONFIG_PM
2536 pci_save_state(pdev);
2537
2538 #endif
2539 pci_disable_device(pdev);
2540 }
2541
2542 /**
2543 * i40evf_probe - Device Initialization Routine
2544 * @pdev: PCI device information struct
2545 * @ent: entry in i40evf_pci_tbl
2546 *
2547 * Returns 0 on success, negative on failure
2548 *
2549 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2550 * The OS initialization, configuring of the adapter private structure,
2551 * and a hardware reset occur.
2552 **/
2553 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2554 {
2555 struct net_device *netdev;
2556 struct i40evf_adapter *adapter = NULL;
2557 struct i40e_hw *hw = NULL;
2558 int err;
2559
2560 err = pci_enable_device(pdev);
2561 if (err)
2562 return err;
2563
2564 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2565 if (err) {
2566 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2567 if (err) {
2568 dev_err(&pdev->dev,
2569 "DMA configuration failed: 0x%x\n", err);
2570 goto err_dma;
2571 }
2572 }
2573
2574 err = pci_request_regions(pdev, i40evf_driver_name);
2575 if (err) {
2576 dev_err(&pdev->dev,
2577 "pci_request_regions failed 0x%x\n", err);
2578 goto err_pci_reg;
2579 }
2580
2581 pci_enable_pcie_error_reporting(pdev);
2582
2583 pci_set_master(pdev);
2584
2585 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2586 MAX_TX_QUEUES);
2587 if (!netdev) {
2588 err = -ENOMEM;
2589 goto err_alloc_etherdev;
2590 }
2591
2592 SET_NETDEV_DEV(netdev, &pdev->dev);
2593
2594 pci_set_drvdata(pdev, netdev);
2595 adapter = netdev_priv(netdev);
2596
2597 adapter->netdev = netdev;
2598 adapter->pdev = pdev;
2599
2600 hw = &adapter->hw;
2601 hw->back = adapter;
2602
2603 adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2604 adapter->state = __I40EVF_STARTUP;
2605
2606 /* Call save state here because it relies on the adapter struct. */
2607 pci_save_state(pdev);
2608
2609 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2610 pci_resource_len(pdev, 0));
2611 if (!hw->hw_addr) {
2612 err = -EIO;
2613 goto err_ioremap;
2614 }
2615 hw->vendor_id = pdev->vendor;
2616 hw->device_id = pdev->device;
2617 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2618 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2619 hw->subsystem_device_id = pdev->subsystem_device;
2620 hw->bus.device = PCI_SLOT(pdev->devfn);
2621 hw->bus.func = PCI_FUNC(pdev->devfn);
2622
2623 INIT_LIST_HEAD(&adapter->mac_filter_list);
2624 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2625
2626 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2627 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2628 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2629 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2630 schedule_delayed_work(&adapter->init_task,
2631 msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
2632
2633 return 0;
2634
2635 err_ioremap:
2636 free_netdev(netdev);
2637 err_alloc_etherdev:
2638 pci_release_regions(pdev);
2639 err_pci_reg:
2640 err_dma:
2641 pci_disable_device(pdev);
2642 return err;
2643 }
2644
2645 #ifdef CONFIG_PM
2646 /**
2647 * i40evf_suspend - Power management suspend routine
2648 * @pdev: PCI device information struct
2649 * @state: unused
2650 *
2651 * Called when the system (VM) is entering sleep/suspend.
2652 **/
2653 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2654 {
2655 struct net_device *netdev = pci_get_drvdata(pdev);
2656 struct i40evf_adapter *adapter = netdev_priv(netdev);
2657 int retval = 0;
2658
2659 netif_device_detach(netdev);
2660
2661 if (netif_running(netdev)) {
2662 rtnl_lock();
2663 i40evf_down(adapter);
2664 rtnl_unlock();
2665 }
2666 i40evf_free_misc_irq(adapter);
2667 i40evf_reset_interrupt_capability(adapter);
2668
2669 retval = pci_save_state(pdev);
2670 if (retval)
2671 return retval;
2672
2673 pci_disable_device(pdev);
2674
2675 return 0;
2676 }
2677
2678 /**
2679 * i40evf_resume - Power management resume routine
2680 * @pdev: PCI device information struct
2681 *
2682 * Called when the system (VM) is resumed from sleep/suspend.
2683 **/
2684 static int i40evf_resume(struct pci_dev *pdev)
2685 {
2686 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2687 struct net_device *netdev = adapter->netdev;
2688 u32 err;
2689
2690 pci_set_power_state(pdev, PCI_D0);
2691 pci_restore_state(pdev);
2692 /* pci_restore_state clears dev->state_saved so call
2693 * pci_save_state to restore it.
2694 */
2695 pci_save_state(pdev);
2696
2697 err = pci_enable_device_mem(pdev);
2698 if (err) {
2699 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2700 return err;
2701 }
2702 pci_set_master(pdev);
2703
2704 rtnl_lock();
2705 err = i40evf_set_interrupt_capability(adapter);
2706 if (err) {
2707 rtnl_unlock();
2708 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2709 return err;
2710 }
2711 err = i40evf_request_misc_irq(adapter);
2712 rtnl_unlock();
2713 if (err) {
2714 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2715 return err;
2716 }
2717
2718 schedule_work(&adapter->reset_task);
2719
2720 netif_device_attach(netdev);
2721
2722 return err;
2723 }
2724
2725 #endif /* CONFIG_PM */
2726 /**
2727 * i40evf_remove - Device Removal Routine
2728 * @pdev: PCI device information struct
2729 *
2730 * i40evf_remove is called by the PCI subsystem to alert the driver
2731 * that it should release a PCI device. The could be caused by a
2732 * Hot-Plug event, or because the driver is going to be removed from
2733 * memory.
2734 **/
2735 static void i40evf_remove(struct pci_dev *pdev)
2736 {
2737 struct net_device *netdev = pci_get_drvdata(pdev);
2738 struct i40evf_adapter *adapter = netdev_priv(netdev);
2739 struct i40evf_mac_filter *f, *ftmp;
2740 struct i40e_hw *hw = &adapter->hw;
2741
2742 cancel_delayed_work_sync(&adapter->init_task);
2743 cancel_work_sync(&adapter->reset_task);
2744
2745 if (adapter->netdev_registered) {
2746 unregister_netdev(netdev);
2747 adapter->netdev_registered = false;
2748 }
2749
2750 /* Shut down all the garbage mashers on the detention level */
2751 adapter->state = __I40EVF_REMOVE;
2752 adapter->aq_required = 0;
2753 i40evf_request_reset(adapter);
2754 msleep(20);
2755 /* If the FW isn't responding, kick it once, but only once. */
2756 if (!i40evf_asq_done(hw)) {
2757 i40evf_request_reset(adapter);
2758 msleep(20);
2759 }
2760
2761 if (adapter->msix_entries) {
2762 i40evf_misc_irq_disable(adapter);
2763 i40evf_free_misc_irq(adapter);
2764 i40evf_reset_interrupt_capability(adapter);
2765 i40evf_free_q_vectors(adapter);
2766 }
2767
2768 if (adapter->watchdog_timer.function)
2769 del_timer_sync(&adapter->watchdog_timer);
2770
2771 flush_scheduled_work();
2772
2773 if (hw->aq.asq.count)
2774 i40evf_shutdown_adminq(hw);
2775
2776 iounmap(hw->hw_addr);
2777 pci_release_regions(pdev);
2778
2779 i40evf_free_all_tx_resources(adapter);
2780 i40evf_free_all_rx_resources(adapter);
2781 i40evf_free_queues(adapter);
2782 kfree(adapter->vf_res);
2783 /* If we got removed before an up/down sequence, we've got a filter
2784 * hanging out there that we need to get rid of.
2785 */
2786 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2787 list_del(&f->list);
2788 kfree(f);
2789 }
2790 list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2791 list_del(&f->list);
2792 kfree(f);
2793 }
2794
2795 free_netdev(netdev);
2796
2797 pci_disable_pcie_error_reporting(pdev);
2798
2799 pci_disable_device(pdev);
2800 }
2801
2802 static struct pci_driver i40evf_driver = {
2803 .name = i40evf_driver_name,
2804 .id_table = i40evf_pci_tbl,
2805 .probe = i40evf_probe,
2806 .remove = i40evf_remove,
2807 #ifdef CONFIG_PM
2808 .suspend = i40evf_suspend,
2809 .resume = i40evf_resume,
2810 #endif
2811 .shutdown = i40evf_shutdown,
2812 };
2813
2814 /**
2815 * i40e_init_module - Driver Registration Routine
2816 *
2817 * i40e_init_module is the first routine called when the driver is
2818 * loaded. All it does is register with the PCI subsystem.
2819 **/
2820 static int __init i40evf_init_module(void)
2821 {
2822 int ret;
2823
2824 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2825 i40evf_driver_version);
2826
2827 pr_info("%s\n", i40evf_copyright);
2828
2829 ret = pci_register_driver(&i40evf_driver);
2830 return ret;
2831 }
2832
2833 module_init(i40evf_init_module);
2834
2835 /**
2836 * i40e_exit_module - Driver Exit Cleanup Routine
2837 *
2838 * i40e_exit_module is called just before the driver is removed
2839 * from memory.
2840 **/
2841 static void __exit i40evf_exit_module(void)
2842 {
2843 pci_unregister_driver(&i40evf_driver);
2844 }
2845
2846 module_exit(i40evf_exit_module);
2847
2848 /* i40evf_main.c */
Linux kernel - Deliverables
This page took 0.211618 seconds and 5 git commands to generate.