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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[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 - 2016 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) 40-10 Gigabit Virtual Function Network Driver";
36
37 #define DRV_KERN "-k"
38
39 #define DRV_VERSION_MAJOR 1
40 #define DRV_VERSION_MINOR 5
41 #define DRV_VERSION_BUILD 5
42 #define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
43 __stringify(DRV_VERSION_MINOR) "." \
44 __stringify(DRV_VERSION_BUILD) \
45 DRV_KERN
46 const char i40evf_driver_version[] = DRV_VERSION;
47 static const char i40evf_copyright[] =
48 "Copyright (c) 2013 - 2015 Intel Corporation.";
49
50 /* i40evf_pci_tbl - PCI Device ID Table
51 *
52 * Wildcard entries (PCI_ANY_ID) should come last
53 * Last entry must be all 0s
54 *
55 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
56 * Class, Class Mask, private data (not used) }
57 */
58 static const struct pci_device_id i40evf_pci_tbl[] = {
59 {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
60 {PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF), 0},
61 /* required last entry */
62 {0, }
63 };
64
65 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
66
67 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
68 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
69 MODULE_LICENSE("GPL");
70 MODULE_VERSION(DRV_VERSION);
71
72 static struct workqueue_struct *i40evf_wq;
73
74 /**
75 * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
76 * @hw: pointer to the HW structure
77 * @mem: ptr to mem struct to fill out
78 * @size: size of memory requested
79 * @alignment: what to align the allocation to
80 **/
81 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
82 struct i40e_dma_mem *mem,
83 u64 size, u32 alignment)
84 {
85 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
86
87 if (!mem)
88 return I40E_ERR_PARAM;
89
90 mem->size = ALIGN(size, alignment);
91 mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
92 (dma_addr_t *)&mem->pa, GFP_KERNEL);
93 if (mem->va)
94 return 0;
95 else
96 return I40E_ERR_NO_MEMORY;
97 }
98
99 /**
100 * i40evf_free_dma_mem_d - OS specific memory free for shared code
101 * @hw: pointer to the HW structure
102 * @mem: ptr to mem struct to free
103 **/
104 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
105 {
106 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
107
108 if (!mem || !mem->va)
109 return I40E_ERR_PARAM;
110 dma_free_coherent(&adapter->pdev->dev, mem->size,
111 mem->va, (dma_addr_t)mem->pa);
112 return 0;
113 }
114
115 /**
116 * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
117 * @hw: pointer to the HW structure
118 * @mem: ptr to mem struct to fill out
119 * @size: size of memory requested
120 **/
121 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
122 struct i40e_virt_mem *mem, u32 size)
123 {
124 if (!mem)
125 return I40E_ERR_PARAM;
126
127 mem->size = size;
128 mem->va = kzalloc(size, GFP_KERNEL);
129
130 if (mem->va)
131 return 0;
132 else
133 return I40E_ERR_NO_MEMORY;
134 }
135
136 /**
137 * i40evf_free_virt_mem_d - OS specific memory free for shared code
138 * @hw: pointer to the HW structure
139 * @mem: ptr to mem struct to free
140 **/
141 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
142 struct i40e_virt_mem *mem)
143 {
144 if (!mem)
145 return I40E_ERR_PARAM;
146
147 /* it's ok to kfree a NULL pointer */
148 kfree(mem->va);
149
150 return 0;
151 }
152
153 /**
154 * i40evf_debug_d - OS dependent version of debug printing
155 * @hw: pointer to the HW structure
156 * @mask: debug level mask
157 * @fmt_str: printf-type format description
158 **/
159 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
160 {
161 char buf[512];
162 va_list argptr;
163
164 if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
165 return;
166
167 va_start(argptr, fmt_str);
168 vsnprintf(buf, sizeof(buf), fmt_str, argptr);
169 va_end(argptr);
170
171 /* the debug string is already formatted with a newline */
172 pr_info("%s", buf);
173 }
174
175 /**
176 * i40evf_schedule_reset - Set the flags and schedule a reset event
177 * @adapter: board private structure
178 **/
179 void i40evf_schedule_reset(struct i40evf_adapter *adapter)
180 {
181 if (!(adapter->flags &
182 (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED))) {
183 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
184 schedule_work(&adapter->reset_task);
185 }
186 }
187
188 /**
189 * i40evf_tx_timeout - Respond to a Tx Hang
190 * @netdev: network interface device structure
191 **/
192 static void i40evf_tx_timeout(struct net_device *netdev)
193 {
194 struct i40evf_adapter *adapter = netdev_priv(netdev);
195
196 adapter->tx_timeout_count++;
197 i40evf_schedule_reset(adapter);
198 }
199
200 /**
201 * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
202 * @adapter: board private structure
203 **/
204 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
205 {
206 struct i40e_hw *hw = &adapter->hw;
207
208 wr32(hw, I40E_VFINT_DYN_CTL01, 0);
209
210 /* read flush */
211 rd32(hw, I40E_VFGEN_RSTAT);
212
213 synchronize_irq(adapter->msix_entries[0].vector);
214 }
215
216 /**
217 * i40evf_misc_irq_enable - Enable default interrupt generation settings
218 * @adapter: board private structure
219 **/
220 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
221 {
222 struct i40e_hw *hw = &adapter->hw;
223
224 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
225 I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
226 wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA1_ADMINQ_MASK);
227
228 /* read flush */
229 rd32(hw, I40E_VFGEN_RSTAT);
230 }
231
232 /**
233 * i40evf_irq_disable - Mask off interrupt generation on the NIC
234 * @adapter: board private structure
235 **/
236 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
237 {
238 int i;
239 struct i40e_hw *hw = &adapter->hw;
240
241 if (!adapter->msix_entries)
242 return;
243
244 for (i = 1; i < adapter->num_msix_vectors; i++) {
245 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
246 synchronize_irq(adapter->msix_entries[i].vector);
247 }
248 /* read flush */
249 rd32(hw, I40E_VFGEN_RSTAT);
250 }
251
252 /**
253 * i40evf_irq_enable_queues - Enable interrupt for specified queues
254 * @adapter: board private structure
255 * @mask: bitmap of queues to enable
256 **/
257 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
258 {
259 struct i40e_hw *hw = &adapter->hw;
260 int i;
261
262 for (i = 1; i < adapter->num_msix_vectors; i++) {
263 if (mask & BIT(i - 1)) {
264 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
265 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
266 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
267 I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK);
268 }
269 }
270 }
271
272 /**
273 * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
274 * @adapter: board private structure
275 * @mask: bitmap of vectors to trigger
276 **/
277 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
278 {
279 struct i40e_hw *hw = &adapter->hw;
280 int i;
281 u32 dyn_ctl;
282
283 if (mask & 1) {
284 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
285 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
286 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
287 I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
288 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
289 }
290 for (i = 1; i < adapter->num_msix_vectors; i++) {
291 if (mask & BIT(i)) {
292 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
293 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
294 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
295 I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
296 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
297 }
298 }
299 }
300
301 /**
302 * i40evf_irq_enable - Enable default interrupt generation settings
303 * @adapter: board private structure
304 * @flush: boolean value whether to run rd32()
305 **/
306 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
307 {
308 struct i40e_hw *hw = &adapter->hw;
309
310 i40evf_misc_irq_enable(adapter);
311 i40evf_irq_enable_queues(adapter, ~0);
312
313 if (flush)
314 rd32(hw, I40E_VFGEN_RSTAT);
315 }
316
317 /**
318 * i40evf_msix_aq - Interrupt handler for vector 0
319 * @irq: interrupt number
320 * @data: pointer to netdev
321 **/
322 static irqreturn_t i40evf_msix_aq(int irq, void *data)
323 {
324 struct net_device *netdev = data;
325 struct i40evf_adapter *adapter = netdev_priv(netdev);
326 struct i40e_hw *hw = &adapter->hw;
327 u32 val;
328
329 /* handle non-queue interrupts, these reads clear the registers */
330 val = rd32(hw, I40E_VFINT_ICR01);
331 val = rd32(hw, I40E_VFINT_ICR0_ENA1);
332
333 val = rd32(hw, I40E_VFINT_DYN_CTL01) |
334 I40E_VFINT_DYN_CTL01_CLEARPBA_MASK;
335 wr32(hw, I40E_VFINT_DYN_CTL01, val);
336
337 /* schedule work on the private workqueue */
338 schedule_work(&adapter->adminq_task);
339
340 return IRQ_HANDLED;
341 }
342
343 /**
344 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
345 * @irq: interrupt number
346 * @data: pointer to a q_vector
347 **/
348 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
349 {
350 struct i40e_q_vector *q_vector = data;
351
352 if (!q_vector->tx.ring && !q_vector->rx.ring)
353 return IRQ_HANDLED;
354
355 napi_schedule_irqoff(&q_vector->napi);
356
357 return IRQ_HANDLED;
358 }
359
360 /**
361 * i40evf_map_vector_to_rxq - associate irqs with rx queues
362 * @adapter: board private structure
363 * @v_idx: interrupt number
364 * @r_idx: queue number
365 **/
366 static void
367 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
368 {
369 struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
370 struct i40e_ring *rx_ring = &adapter->rx_rings[r_idx];
371
372 rx_ring->q_vector = q_vector;
373 rx_ring->next = q_vector->rx.ring;
374 rx_ring->vsi = &adapter->vsi;
375 q_vector->rx.ring = rx_ring;
376 q_vector->rx.count++;
377 q_vector->rx.latency_range = I40E_LOW_LATENCY;
378 q_vector->itr_countdown = ITR_COUNTDOWN_START;
379 }
380
381 /**
382 * i40evf_map_vector_to_txq - associate irqs with tx queues
383 * @adapter: board private structure
384 * @v_idx: interrupt number
385 * @t_idx: queue number
386 **/
387 static void
388 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
389 {
390 struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
391 struct i40e_ring *tx_ring = &adapter->tx_rings[t_idx];
392
393 tx_ring->q_vector = q_vector;
394 tx_ring->next = q_vector->tx.ring;
395 tx_ring->vsi = &adapter->vsi;
396 q_vector->tx.ring = tx_ring;
397 q_vector->tx.count++;
398 q_vector->tx.latency_range = I40E_LOW_LATENCY;
399 q_vector->itr_countdown = ITR_COUNTDOWN_START;
400 q_vector->num_ringpairs++;
401 q_vector->ring_mask |= BIT(t_idx);
402 }
403
404 /**
405 * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
406 * @adapter: board private structure to initialize
407 *
408 * This function maps descriptor rings to the queue-specific vectors
409 * we were allotted through the MSI-X enabling code. Ideally, we'd have
410 * one vector per ring/queue, but on a constrained vector budget, we
411 * group the rings as "efficiently" as possible. You would add new
412 * mapping configurations in here.
413 **/
414 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
415 {
416 int q_vectors;
417 int v_start = 0;
418 int rxr_idx = 0, txr_idx = 0;
419 int rxr_remaining = adapter->num_active_queues;
420 int txr_remaining = adapter->num_active_queues;
421 int i, j;
422 int rqpv, tqpv;
423 int err = 0;
424
425 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
426
427 /* The ideal configuration...
428 * We have enough vectors to map one per queue.
429 */
430 if (q_vectors >= (rxr_remaining * 2)) {
431 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
432 i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
433
434 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
435 i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
436 goto out;
437 }
438
439 /* If we don't have enough vectors for a 1-to-1
440 * mapping, we'll have to group them so there are
441 * multiple queues per vector.
442 * Re-adjusting *qpv takes care of the remainder.
443 */
444 for (i = v_start; i < q_vectors; i++) {
445 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
446 for (j = 0; j < rqpv; j++) {
447 i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
448 rxr_idx++;
449 rxr_remaining--;
450 }
451 }
452 for (i = v_start; i < q_vectors; i++) {
453 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
454 for (j = 0; j < tqpv; j++) {
455 i40evf_map_vector_to_txq(adapter, i, txr_idx);
456 txr_idx++;
457 txr_remaining--;
458 }
459 }
460
461 out:
462 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
463
464 return err;
465 }
466
467 #ifdef CONFIG_NET_POLL_CONTROLLER
468 /**
469 * i40evf_netpoll - A Polling 'interrupt' handler
470 * @netdev: network interface device structure
471 *
472 * This is used by netconsole to send skbs without having to re-enable
473 * interrupts. It's not called while the normal interrupt routine is executing.
474 **/
475 static void i40evf_netpoll(struct net_device *netdev)
476 {
477 struct i40evf_adapter *adapter = netdev_priv(netdev);
478 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
479 int i;
480
481 /* if interface is down do nothing */
482 if (test_bit(__I40E_DOWN, &adapter->vsi.state))
483 return;
484
485 for (i = 0; i < q_vectors; i++)
486 i40evf_msix_clean_rings(0, &adapter->q_vectors[i]);
487 }
488
489 #endif
490 /**
491 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
492 * @adapter: board private structure
493 *
494 * Allocates MSI-X vectors for tx and rx handling, and requests
495 * interrupts from the kernel.
496 **/
497 static int
498 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
499 {
500 int vector, err, q_vectors;
501 int rx_int_idx = 0, tx_int_idx = 0;
502
503 i40evf_irq_disable(adapter);
504 /* Decrement for Other and TCP Timer vectors */
505 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
506
507 for (vector = 0; vector < q_vectors; vector++) {
508 struct i40e_q_vector *q_vector = &adapter->q_vectors[vector];
509
510 if (q_vector->tx.ring && q_vector->rx.ring) {
511 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
512 "i40evf-%s-%s-%d", basename,
513 "TxRx", rx_int_idx++);
514 tx_int_idx++;
515 } else if (q_vector->rx.ring) {
516 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
517 "i40evf-%s-%s-%d", basename,
518 "rx", rx_int_idx++);
519 } else if (q_vector->tx.ring) {
520 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
521 "i40evf-%s-%s-%d", basename,
522 "tx", tx_int_idx++);
523 } else {
524 /* skip this unused q_vector */
525 continue;
526 }
527 err = request_irq(
528 adapter->msix_entries[vector + NONQ_VECS].vector,
529 i40evf_msix_clean_rings,
530 0,
531 q_vector->name,
532 q_vector);
533 if (err) {
534 dev_info(&adapter->pdev->dev,
535 "Request_irq failed, error: %d\n", err);
536 goto free_queue_irqs;
537 }
538 /* assign the mask for this irq */
539 irq_set_affinity_hint(
540 adapter->msix_entries[vector + NONQ_VECS].vector,
541 q_vector->affinity_mask);
542 }
543
544 return 0;
545
546 free_queue_irqs:
547 while (vector) {
548 vector--;
549 irq_set_affinity_hint(
550 adapter->msix_entries[vector + NONQ_VECS].vector,
551 NULL);
552 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
553 &adapter->q_vectors[vector]);
554 }
555 return err;
556 }
557
558 /**
559 * i40evf_request_misc_irq - Initialize MSI-X interrupts
560 * @adapter: board private structure
561 *
562 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
563 * vector is only for the admin queue, and stays active even when the netdev
564 * is closed.
565 **/
566 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
567 {
568 struct net_device *netdev = adapter->netdev;
569 int err;
570
571 snprintf(adapter->misc_vector_name,
572 sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
573 dev_name(&adapter->pdev->dev));
574 err = request_irq(adapter->msix_entries[0].vector,
575 &i40evf_msix_aq, 0,
576 adapter->misc_vector_name, netdev);
577 if (err) {
578 dev_err(&adapter->pdev->dev,
579 "request_irq for %s failed: %d\n",
580 adapter->misc_vector_name, err);
581 free_irq(adapter->msix_entries[0].vector, netdev);
582 }
583 return err;
584 }
585
586 /**
587 * i40evf_free_traffic_irqs - Free MSI-X interrupts
588 * @adapter: board private structure
589 *
590 * Frees all MSI-X vectors other than 0.
591 **/
592 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
593 {
594 int i;
595 int q_vectors;
596
597 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
598
599 for (i = 0; i < q_vectors; i++) {
600 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
601 NULL);
602 free_irq(adapter->msix_entries[i+1].vector,
603 &adapter->q_vectors[i]);
604 }
605 }
606
607 /**
608 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
609 * @adapter: board private structure
610 *
611 * Frees MSI-X vector 0.
612 **/
613 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
614 {
615 struct net_device *netdev = adapter->netdev;
616
617 free_irq(adapter->msix_entries[0].vector, netdev);
618 }
619
620 /**
621 * i40evf_configure_tx - Configure Transmit Unit after Reset
622 * @adapter: board private structure
623 *
624 * Configure the Tx unit of the MAC after a reset.
625 **/
626 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
627 {
628 struct i40e_hw *hw = &adapter->hw;
629 int i;
630
631 for (i = 0; i < adapter->num_active_queues; i++)
632 adapter->tx_rings[i].tail = hw->hw_addr + I40E_QTX_TAIL1(i);
633 }
634
635 /**
636 * i40evf_configure_rx - Configure Receive Unit after Reset
637 * @adapter: board private structure
638 *
639 * Configure the Rx unit of the MAC after a reset.
640 **/
641 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
642 {
643 struct i40e_hw *hw = &adapter->hw;
644 struct net_device *netdev = adapter->netdev;
645 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
646 int i;
647 int rx_buf_len;
648
649
650 /* Set the RX buffer length according to the mode */
651 if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED ||
652 netdev->mtu <= ETH_DATA_LEN)
653 rx_buf_len = I40EVF_RXBUFFER_2048;
654 else
655 rx_buf_len = ALIGN(max_frame, 1024);
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 if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
661 set_ring_ps_enabled(&adapter->rx_rings[i]);
662 adapter->rx_rings[i].rx_hdr_len = I40E_RX_HDR_SIZE;
663 } else {
664 clear_ring_ps_enabled(&adapter->rx_rings[i]);
665 }
666 }
667 }
668
669 /**
670 * i40evf_find_vlan - Search filter list for specific vlan filter
671 * @adapter: board private structure
672 * @vlan: vlan tag
673 *
674 * Returns ptr to the filter object or NULL
675 **/
676 static struct
677 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
678 {
679 struct i40evf_vlan_filter *f;
680
681 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
682 if (vlan == f->vlan)
683 return f;
684 }
685 return NULL;
686 }
687
688 /**
689 * i40evf_add_vlan - Add a vlan filter to the list
690 * @adapter: board private structure
691 * @vlan: VLAN tag
692 *
693 * Returns ptr to the filter object or NULL when no memory available.
694 **/
695 static struct
696 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
697 {
698 struct i40evf_vlan_filter *f = NULL;
699 int count = 50;
700
701 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
702 &adapter->crit_section)) {
703 udelay(1);
704 if (--count == 0)
705 goto out;
706 }
707
708 f = i40evf_find_vlan(adapter, vlan);
709 if (!f) {
710 f = kzalloc(sizeof(*f), GFP_ATOMIC);
711 if (!f)
712 goto clearout;
713
714 f->vlan = vlan;
715
716 INIT_LIST_HEAD(&f->list);
717 list_add(&f->list, &adapter->vlan_filter_list);
718 f->add = true;
719 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
720 }
721
722 clearout:
723 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
724 out:
725 return f;
726 }
727
728 /**
729 * i40evf_del_vlan - Remove a vlan filter from the list
730 * @adapter: board private structure
731 * @vlan: VLAN tag
732 **/
733 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
734 {
735 struct i40evf_vlan_filter *f;
736 int count = 50;
737
738 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
739 &adapter->crit_section)) {
740 udelay(1);
741 if (--count == 0)
742 return;
743 }
744
745 f = i40evf_find_vlan(adapter, vlan);
746 if (f) {
747 f->remove = true;
748 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
749 }
750 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
751 }
752
753 /**
754 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
755 * @netdev: network device struct
756 * @vid: VLAN tag
757 **/
758 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
759 __always_unused __be16 proto, u16 vid)
760 {
761 struct i40evf_adapter *adapter = netdev_priv(netdev);
762
763 if (!VLAN_ALLOWED(adapter))
764 return -EIO;
765 if (i40evf_add_vlan(adapter, vid) == NULL)
766 return -ENOMEM;
767 return 0;
768 }
769
770 /**
771 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
772 * @netdev: network device struct
773 * @vid: VLAN tag
774 **/
775 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
776 __always_unused __be16 proto, u16 vid)
777 {
778 struct i40evf_adapter *adapter = netdev_priv(netdev);
779
780 if (VLAN_ALLOWED(adapter)) {
781 i40evf_del_vlan(adapter, vid);
782 return 0;
783 }
784 return -EIO;
785 }
786
787 /**
788 * i40evf_find_filter - Search filter list for specific mac filter
789 * @adapter: board private structure
790 * @macaddr: the MAC address
791 *
792 * Returns ptr to the filter object or NULL
793 **/
794 static struct
795 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
796 u8 *macaddr)
797 {
798 struct i40evf_mac_filter *f;
799
800 if (!macaddr)
801 return NULL;
802
803 list_for_each_entry(f, &adapter->mac_filter_list, list) {
804 if (ether_addr_equal(macaddr, f->macaddr))
805 return f;
806 }
807 return NULL;
808 }
809
810 /**
811 * i40e_add_filter - Add a mac filter to the filter list
812 * @adapter: board private structure
813 * @macaddr: the MAC address
814 *
815 * Returns ptr to the filter object or NULL when no memory available.
816 **/
817 static struct
818 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
819 u8 *macaddr)
820 {
821 struct i40evf_mac_filter *f;
822 int count = 50;
823
824 if (!macaddr)
825 return NULL;
826
827 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
828 &adapter->crit_section)) {
829 udelay(1);
830 if (--count == 0)
831 return NULL;
832 }
833
834 f = i40evf_find_filter(adapter, macaddr);
835 if (!f) {
836 f = kzalloc(sizeof(*f), GFP_ATOMIC);
837 if (!f) {
838 clear_bit(__I40EVF_IN_CRITICAL_TASK,
839 &adapter->crit_section);
840 return NULL;
841 }
842
843 ether_addr_copy(f->macaddr, macaddr);
844
845 list_add(&f->list, &adapter->mac_filter_list);
846 f->add = true;
847 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
848 }
849
850 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
851 return f;
852 }
853
854 /**
855 * i40evf_set_mac - NDO callback to set port mac address
856 * @netdev: network interface device structure
857 * @p: pointer to an address structure
858 *
859 * Returns 0 on success, negative on failure
860 **/
861 static int i40evf_set_mac(struct net_device *netdev, void *p)
862 {
863 struct i40evf_adapter *adapter = netdev_priv(netdev);
864 struct i40e_hw *hw = &adapter->hw;
865 struct i40evf_mac_filter *f;
866 struct sockaddr *addr = p;
867
868 if (!is_valid_ether_addr(addr->sa_data))
869 return -EADDRNOTAVAIL;
870
871 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
872 return 0;
873
874 if (adapter->flags & I40EVF_FLAG_ADDR_SET_BY_PF)
875 return -EPERM;
876
877 f = i40evf_find_filter(adapter, hw->mac.addr);
878 if (f) {
879 f->remove = true;
880 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
881 }
882
883 f = i40evf_add_filter(adapter, addr->sa_data);
884 if (f) {
885 ether_addr_copy(hw->mac.addr, addr->sa_data);
886 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
887 }
888
889 return (f == NULL) ? -ENOMEM : 0;
890 }
891
892 /**
893 * i40evf_set_rx_mode - NDO callback to set the netdev filters
894 * @netdev: network interface device structure
895 **/
896 static void i40evf_set_rx_mode(struct net_device *netdev)
897 {
898 struct i40evf_adapter *adapter = netdev_priv(netdev);
899 struct i40evf_mac_filter *f, *ftmp;
900 struct netdev_hw_addr *uca;
901 struct netdev_hw_addr *mca;
902 struct netdev_hw_addr *ha;
903 int count = 50;
904
905 /* add addr if not already in the filter list */
906 netdev_for_each_uc_addr(uca, netdev) {
907 i40evf_add_filter(adapter, uca->addr);
908 }
909 netdev_for_each_mc_addr(mca, netdev) {
910 i40evf_add_filter(adapter, mca->addr);
911 }
912
913 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
914 &adapter->crit_section)) {
915 udelay(1);
916 if (--count == 0) {
917 dev_err(&adapter->pdev->dev,
918 "Failed to get lock in %s\n", __func__);
919 return;
920 }
921 }
922 /* remove filter if not in netdev list */
923 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
924 netdev_for_each_mc_addr(mca, netdev)
925 if (ether_addr_equal(mca->addr, f->macaddr))
926 goto bottom_of_search_loop;
927
928 netdev_for_each_uc_addr(uca, netdev)
929 if (ether_addr_equal(uca->addr, f->macaddr))
930 goto bottom_of_search_loop;
931
932 for_each_dev_addr(netdev, ha)
933 if (ether_addr_equal(ha->addr, f->macaddr))
934 goto bottom_of_search_loop;
935
936 if (ether_addr_equal(f->macaddr, adapter->hw.mac.addr))
937 goto bottom_of_search_loop;
938
939 /* f->macaddr wasn't found in uc, mc, or ha list so delete it */
940 f->remove = true;
941 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
942
943 bottom_of_search_loop:
944 continue;
945 }
946 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
947 }
948
949 /**
950 * i40evf_napi_enable_all - enable NAPI on all queue vectors
951 * @adapter: board private structure
952 **/
953 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
954 {
955 int q_idx;
956 struct i40e_q_vector *q_vector;
957 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
958
959 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
960 struct napi_struct *napi;
961
962 q_vector = &adapter->q_vectors[q_idx];
963 napi = &q_vector->napi;
964 napi_enable(napi);
965 }
966 }
967
968 /**
969 * i40evf_napi_disable_all - disable NAPI on all queue vectors
970 * @adapter: board private structure
971 **/
972 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
973 {
974 int q_idx;
975 struct i40e_q_vector *q_vector;
976 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
977
978 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
979 q_vector = &adapter->q_vectors[q_idx];
980 napi_disable(&q_vector->napi);
981 }
982 }
983
984 /**
985 * i40evf_configure - set up transmit and receive data structures
986 * @adapter: board private structure
987 **/
988 static void i40evf_configure(struct i40evf_adapter *adapter)
989 {
990 struct net_device *netdev = adapter->netdev;
991 int i;
992
993 i40evf_set_rx_mode(netdev);
994
995 i40evf_configure_tx(adapter);
996 i40evf_configure_rx(adapter);
997 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
998
999 for (i = 0; i < adapter->num_active_queues; i++) {
1000 struct i40e_ring *ring = &adapter->rx_rings[i];
1001
1002 if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
1003 i40evf_alloc_rx_headers(ring);
1004 i40evf_alloc_rx_buffers_ps(ring, ring->count);
1005 } else {
1006 i40evf_alloc_rx_buffers_1buf(ring, ring->count);
1007 }
1008 ring->next_to_use = ring->count - 1;
1009 writel(ring->next_to_use, ring->tail);
1010 }
1011 }
1012
1013 /**
1014 * i40evf_up_complete - Finish the last steps of bringing up a connection
1015 * @adapter: board private structure
1016 **/
1017 static int i40evf_up_complete(struct i40evf_adapter *adapter)
1018 {
1019 adapter->state = __I40EVF_RUNNING;
1020 clear_bit(__I40E_DOWN, &adapter->vsi.state);
1021
1022 i40evf_napi_enable_all(adapter);
1023
1024 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
1025 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
1026 return 0;
1027 }
1028
1029 /**
1030 * i40e_down - Shutdown the connection processing
1031 * @adapter: board private structure
1032 **/
1033 void i40evf_down(struct i40evf_adapter *adapter)
1034 {
1035 struct net_device *netdev = adapter->netdev;
1036 struct i40evf_mac_filter *f;
1037
1038 if (adapter->state <= __I40EVF_DOWN_PENDING)
1039 return;
1040
1041 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1042 &adapter->crit_section))
1043 usleep_range(500, 1000);
1044
1045 netif_carrier_off(netdev);
1046 netif_tx_disable(netdev);
1047 i40evf_napi_disable_all(adapter);
1048 i40evf_irq_disable(adapter);
1049
1050 /* remove all MAC filters */
1051 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1052 f->remove = true;
1053 }
1054 /* remove all VLAN filters */
1055 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1056 f->remove = true;
1057 }
1058 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1059 adapter->state != __I40EVF_RESETTING) {
1060 /* cancel any current operation */
1061 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1062 /* Schedule operations to close down the HW. Don't wait
1063 * here for this to complete. The watchdog is still running
1064 * and it will take care of this.
1065 */
1066 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
1067 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
1068 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
1069 }
1070
1071 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1072 }
1073
1074 /**
1075 * i40evf_acquire_msix_vectors - Setup the MSIX capability
1076 * @adapter: board private structure
1077 * @vectors: number of vectors to request
1078 *
1079 * Work with the OS to set up the MSIX vectors needed.
1080 *
1081 * Returns 0 on success, negative on failure
1082 **/
1083 static int
1084 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1085 {
1086 int err, vector_threshold;
1087
1088 /* We'll want at least 3 (vector_threshold):
1089 * 0) Other (Admin Queue and link, mostly)
1090 * 1) TxQ[0] Cleanup
1091 * 2) RxQ[0] Cleanup
1092 */
1093 vector_threshold = MIN_MSIX_COUNT;
1094
1095 /* The more we get, the more we will assign to Tx/Rx Cleanup
1096 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1097 * Right now, we simply care about how many we'll get; we'll
1098 * set them up later while requesting irq's.
1099 */
1100 err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1101 vector_threshold, vectors);
1102 if (err < 0) {
1103 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1104 kfree(adapter->msix_entries);
1105 adapter->msix_entries = NULL;
1106 return err;
1107 }
1108
1109 /* Adjust for only the vectors we'll use, which is minimum
1110 * of max_msix_q_vectors + NONQ_VECS, or the number of
1111 * vectors we were allocated.
1112 */
1113 adapter->num_msix_vectors = err;
1114 return 0;
1115 }
1116
1117 /**
1118 * i40evf_free_queues - Free memory for all rings
1119 * @adapter: board private structure to initialize
1120 *
1121 * Free all of the memory associated with queue pairs.
1122 **/
1123 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1124 {
1125 if (!adapter->vsi_res)
1126 return;
1127 kfree(adapter->tx_rings);
1128 adapter->tx_rings = NULL;
1129 kfree(adapter->rx_rings);
1130 adapter->rx_rings = NULL;
1131 }
1132
1133 /**
1134 * i40evf_alloc_queues - Allocate memory for all rings
1135 * @adapter: board private structure to initialize
1136 *
1137 * We allocate one ring per queue at run-time since we don't know the
1138 * number of queues at compile-time. The polling_netdev array is
1139 * intended for Multiqueue, but should work fine with a single queue.
1140 **/
1141 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1142 {
1143 int i;
1144
1145 adapter->tx_rings = kcalloc(adapter->num_active_queues,
1146 sizeof(struct i40e_ring), GFP_KERNEL);
1147 if (!adapter->tx_rings)
1148 goto err_out;
1149 adapter->rx_rings = kcalloc(adapter->num_active_queues,
1150 sizeof(struct i40e_ring), GFP_KERNEL);
1151 if (!adapter->rx_rings)
1152 goto err_out;
1153
1154 for (i = 0; i < adapter->num_active_queues; i++) {
1155 struct i40e_ring *tx_ring;
1156 struct i40e_ring *rx_ring;
1157
1158 tx_ring = &adapter->tx_rings[i];
1159
1160 tx_ring->queue_index = i;
1161 tx_ring->netdev = adapter->netdev;
1162 tx_ring->dev = &adapter->pdev->dev;
1163 tx_ring->count = adapter->tx_desc_count;
1164 if (adapter->flags & I40E_FLAG_WB_ON_ITR_CAPABLE)
1165 tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR;
1166
1167 rx_ring = &adapter->rx_rings[i];
1168 rx_ring->queue_index = i;
1169 rx_ring->netdev = adapter->netdev;
1170 rx_ring->dev = &adapter->pdev->dev;
1171 rx_ring->count = adapter->rx_desc_count;
1172 }
1173
1174 return 0;
1175
1176 err_out:
1177 i40evf_free_queues(adapter);
1178 return -ENOMEM;
1179 }
1180
1181 /**
1182 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1183 * @adapter: board private structure to initialize
1184 *
1185 * Attempt to configure the interrupts using the best available
1186 * capabilities of the hardware and the kernel.
1187 **/
1188 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1189 {
1190 int vector, v_budget;
1191 int pairs = 0;
1192 int err = 0;
1193
1194 if (!adapter->vsi_res) {
1195 err = -EIO;
1196 goto out;
1197 }
1198 pairs = adapter->num_active_queues;
1199
1200 /* It's easy to be greedy for MSI-X vectors, but it really
1201 * doesn't do us much good if we have a lot more vectors
1202 * than CPU's. So let's be conservative and only ask for
1203 * (roughly) twice the number of vectors as there are CPU's.
1204 */
1205 v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1206 v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1207
1208 adapter->msix_entries = kcalloc(v_budget,
1209 sizeof(struct msix_entry), GFP_KERNEL);
1210 if (!adapter->msix_entries) {
1211 err = -ENOMEM;
1212 goto out;
1213 }
1214
1215 for (vector = 0; vector < v_budget; vector++)
1216 adapter->msix_entries[vector].entry = vector;
1217
1218 err = i40evf_acquire_msix_vectors(adapter, v_budget);
1219
1220 out:
1221 netif_set_real_num_rx_queues(adapter->netdev, pairs);
1222 netif_set_real_num_tx_queues(adapter->netdev, pairs);
1223 return err;
1224 }
1225
1226 /**
1227 * i40e_config_rss_aq - Prepare for RSS using AQ commands
1228 * @vsi: vsi structure
1229 * @seed: RSS hash seed
1230 * @lut: Lookup table
1231 * @lut_size: Lookup table size
1232 *
1233 * Return 0 on success, negative on failure
1234 **/
1235 static int i40evf_config_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
1236 u8 *lut, u16 lut_size)
1237 {
1238 struct i40evf_adapter *adapter = vsi->back;
1239 struct i40e_hw *hw = &adapter->hw;
1240 int ret = 0;
1241
1242 if (!vsi->id)
1243 return -EINVAL;
1244
1245 if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
1246 /* bail because we already have a command pending */
1247 dev_err(&adapter->pdev->dev, "Cannot configure RSS, command %d pending\n",
1248 adapter->current_op);
1249 return -EBUSY;
1250 }
1251
1252 if (seed) {
1253 struct i40e_aqc_get_set_rss_key_data *rss_key =
1254 (struct i40e_aqc_get_set_rss_key_data *)seed;
1255 ret = i40evf_aq_set_rss_key(hw, vsi->id, rss_key);
1256 if (ret) {
1257 dev_err(&adapter->pdev->dev, "Cannot set RSS key, err %s aq_err %s\n",
1258 i40evf_stat_str(hw, ret),
1259 i40evf_aq_str(hw, hw->aq.asq_last_status));
1260 return ret;
1261 }
1262 }
1263
1264 if (lut) {
1265 ret = i40evf_aq_set_rss_lut(hw, vsi->id, false, lut, lut_size);
1266 if (ret) {
1267 dev_err(&adapter->pdev->dev,
1268 "Cannot set RSS lut, err %s aq_err %s\n",
1269 i40evf_stat_str(hw, ret),
1270 i40evf_aq_str(hw, hw->aq.asq_last_status));
1271 return ret;
1272 }
1273 }
1274
1275 return ret;
1276 }
1277
1278 /**
1279 * i40evf_config_rss_reg - Configure RSS keys and lut by writing registers
1280 * @vsi: Pointer to vsi structure
1281 * @seed: RSS hash seed
1282 * @lut: Lookup table
1283 * @lut_size: Lookup table size
1284 *
1285 * Returns 0 on success, negative on failure
1286 **/
1287 static int i40evf_config_rss_reg(struct i40e_vsi *vsi, const u8 *seed,
1288 const u8 *lut, u16 lut_size)
1289 {
1290 struct i40evf_adapter *adapter = vsi->back;
1291 struct i40e_hw *hw = &adapter->hw;
1292 u16 i;
1293
1294 if (seed) {
1295 u32 *seed_dw = (u32 *)seed;
1296
1297 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1298 wr32(hw, I40E_VFQF_HKEY(i), seed_dw[i]);
1299 }
1300
1301 if (lut) {
1302 u32 *lut_dw = (u32 *)lut;
1303
1304 if (lut_size != I40EVF_HLUT_ARRAY_SIZE)
1305 return -EINVAL;
1306
1307 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++)
1308 wr32(hw, I40E_VFQF_HLUT(i), lut_dw[i]);
1309 }
1310 i40e_flush(hw);
1311
1312 return 0;
1313 }
1314
1315 /**
1316 * * i40evf_get_rss_aq - Get RSS keys and lut by using AQ commands
1317 * @vsi: Pointer to vsi structure
1318 * @seed: RSS hash seed
1319 * @lut: Lookup table
1320 * @lut_size: Lookup table size
1321 *
1322 * Return 0 on success, negative on failure
1323 **/
1324 static int i40evf_get_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
1325 u8 *lut, u16 lut_size)
1326 {
1327 struct i40evf_adapter *adapter = vsi->back;
1328 struct i40e_hw *hw = &adapter->hw;
1329 int ret = 0;
1330
1331 if (seed) {
1332 ret = i40evf_aq_get_rss_key(hw, vsi->id,
1333 (struct i40e_aqc_get_set_rss_key_data *)seed);
1334 if (ret) {
1335 dev_err(&adapter->pdev->dev,
1336 "Cannot get RSS key, err %s aq_err %s\n",
1337 i40evf_stat_str(hw, ret),
1338 i40evf_aq_str(hw, hw->aq.asq_last_status));
1339 return ret;
1340 }
1341 }
1342
1343 if (lut) {
1344 ret = i40evf_aq_get_rss_lut(hw, vsi->id, false, lut, lut_size);
1345 if (ret) {
1346 dev_err(&adapter->pdev->dev,
1347 "Cannot get RSS lut, err %s aq_err %s\n",
1348 i40evf_stat_str(hw, ret),
1349 i40evf_aq_str(hw, hw->aq.asq_last_status));
1350 return ret;
1351 }
1352 }
1353
1354 return ret;
1355 }
1356
1357 /**
1358 * * i40evf_get_rss_reg - Get RSS keys and lut by reading registers
1359 * @vsi: Pointer to vsi structure
1360 * @seed: RSS hash seed
1361 * @lut: Lookup table
1362 * @lut_size: Lookup table size
1363 *
1364 * Returns 0 on success, negative on failure
1365 **/
1366 static int i40evf_get_rss_reg(struct i40e_vsi *vsi, const u8 *seed,
1367 const u8 *lut, u16 lut_size)
1368 {
1369 struct i40evf_adapter *adapter = vsi->back;
1370 struct i40e_hw *hw = &adapter->hw;
1371 u16 i;
1372
1373 if (seed) {
1374 u32 *seed_dw = (u32 *)seed;
1375
1376 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1377 seed_dw[i] = rd32(hw, I40E_VFQF_HKEY(i));
1378 }
1379
1380 if (lut) {
1381 u32 *lut_dw = (u32 *)lut;
1382
1383 if (lut_size != I40EVF_HLUT_ARRAY_SIZE)
1384 return -EINVAL;
1385
1386 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++)
1387 lut_dw[i] = rd32(hw, I40E_VFQF_HLUT(i));
1388 }
1389
1390 return 0;
1391 }
1392
1393 /**
1394 * i40evf_config_rss - Configure RSS keys and lut
1395 * @vsi: Pointer to vsi structure
1396 * @seed: RSS hash seed
1397 * @lut: Lookup table
1398 * @lut_size: Lookup table size
1399 *
1400 * Returns 0 on success, negative on failure
1401 **/
1402 int i40evf_config_rss(struct i40e_vsi *vsi, const u8 *seed,
1403 u8 *lut, u16 lut_size)
1404 {
1405 struct i40evf_adapter *adapter = vsi->back;
1406
1407 if (RSS_AQ(adapter))
1408 return i40evf_config_rss_aq(vsi, seed, lut, lut_size);
1409 else
1410 return i40evf_config_rss_reg(vsi, seed, lut, lut_size);
1411 }
1412
1413 /**
1414 * i40evf_get_rss - Get RSS keys and lut
1415 * @vsi: Pointer to vsi structure
1416 * @seed: RSS hash seed
1417 * @lut: Lookup table
1418 * @lut_size: Lookup table size
1419 *
1420 * Returns 0 on success, negative on failure
1421 **/
1422 int i40evf_get_rss(struct i40e_vsi *vsi, const u8 *seed, u8 *lut, u16 lut_size)
1423 {
1424 struct i40evf_adapter *adapter = vsi->back;
1425
1426 if (RSS_AQ(adapter))
1427 return i40evf_get_rss_aq(vsi, seed, lut, lut_size);
1428 else
1429 return i40evf_get_rss_reg(vsi, seed, lut, lut_size);
1430 }
1431
1432 /**
1433 * i40evf_fill_rss_lut - Fill the lut with default values
1434 * @lut: Lookup table to be filled with
1435 * @rss_table_size: Lookup table size
1436 * @rss_size: Range of queue number for hashing
1437 **/
1438 static void i40evf_fill_rss_lut(u8 *lut, u16 rss_table_size, u16 rss_size)
1439 {
1440 u16 i;
1441
1442 for (i = 0; i < rss_table_size; i++)
1443 lut[i] = i % rss_size;
1444 }
1445
1446 /**
1447 * i40evf_init_rss - Prepare for RSS
1448 * @adapter: board private structure
1449 *
1450 * Return 0 on success, negative on failure
1451 **/
1452 static int i40evf_init_rss(struct i40evf_adapter *adapter)
1453 {
1454 struct i40e_vsi *vsi = &adapter->vsi;
1455 struct i40e_hw *hw = &adapter->hw;
1456 u8 seed[I40EVF_HKEY_ARRAY_SIZE];
1457 u64 hena;
1458 u8 *lut;
1459 int ret;
1460
1461 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1462 if (adapter->vf_res->vf_offload_flags &
1463 I40E_VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2)
1464 hena = I40E_DEFAULT_RSS_HENA_EXPANDED;
1465 else
1466 hena = I40E_DEFAULT_RSS_HENA;
1467 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1468 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1469
1470 lut = kzalloc(I40EVF_HLUT_ARRAY_SIZE, GFP_KERNEL);
1471 if (!lut)
1472 return -ENOMEM;
1473
1474 /* Use user configured lut if there is one, otherwise use default */
1475 if (vsi->rss_lut_user)
1476 memcpy(lut, vsi->rss_lut_user, I40EVF_HLUT_ARRAY_SIZE);
1477 else
1478 i40evf_fill_rss_lut(lut, I40EVF_HLUT_ARRAY_SIZE,
1479 adapter->num_active_queues);
1480
1481 /* Use user configured hash key if there is one, otherwise
1482 * user default.
1483 */
1484 if (vsi->rss_hkey_user)
1485 memcpy(seed, vsi->rss_hkey_user, I40EVF_HKEY_ARRAY_SIZE);
1486 else
1487 netdev_rss_key_fill((void *)seed, I40EVF_HKEY_ARRAY_SIZE);
1488 ret = i40evf_config_rss(vsi, seed, lut, I40EVF_HLUT_ARRAY_SIZE);
1489 kfree(lut);
1490
1491 return ret;
1492 }
1493
1494 /**
1495 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1496 * @adapter: board private structure to initialize
1497 *
1498 * We allocate one q_vector per queue interrupt. If allocation fails we
1499 * return -ENOMEM.
1500 **/
1501 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1502 {
1503 int q_idx = 0, num_q_vectors;
1504 struct i40e_q_vector *q_vector;
1505
1506 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1507 adapter->q_vectors = kcalloc(num_q_vectors, sizeof(*q_vector),
1508 GFP_KERNEL);
1509 if (!adapter->q_vectors)
1510 return -ENOMEM;
1511
1512 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1513 q_vector = &adapter->q_vectors[q_idx];
1514 q_vector->adapter = adapter;
1515 q_vector->vsi = &adapter->vsi;
1516 q_vector->v_idx = q_idx;
1517 netif_napi_add(adapter->netdev, &q_vector->napi,
1518 i40evf_napi_poll, NAPI_POLL_WEIGHT);
1519 }
1520
1521 return 0;
1522 }
1523
1524 /**
1525 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1526 * @adapter: board private structure to initialize
1527 *
1528 * This function frees the memory allocated to the q_vectors. In addition if
1529 * NAPI is enabled it will delete any references to the NAPI struct prior
1530 * to freeing the q_vector.
1531 **/
1532 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1533 {
1534 int q_idx, num_q_vectors;
1535 int napi_vectors;
1536
1537 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1538 napi_vectors = adapter->num_active_queues;
1539
1540 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1541 struct i40e_q_vector *q_vector = &adapter->q_vectors[q_idx];
1542 if (q_idx < napi_vectors)
1543 netif_napi_del(&q_vector->napi);
1544 }
1545 kfree(adapter->q_vectors);
1546 }
1547
1548 /**
1549 * i40evf_reset_interrupt_capability - Reset MSIX setup
1550 * @adapter: board private structure
1551 *
1552 **/
1553 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1554 {
1555 pci_disable_msix(adapter->pdev);
1556 kfree(adapter->msix_entries);
1557 adapter->msix_entries = NULL;
1558 }
1559
1560 /**
1561 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1562 * @adapter: board private structure to initialize
1563 *
1564 **/
1565 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1566 {
1567 int err;
1568
1569 err = i40evf_set_interrupt_capability(adapter);
1570 if (err) {
1571 dev_err(&adapter->pdev->dev,
1572 "Unable to setup interrupt capabilities\n");
1573 goto err_set_interrupt;
1574 }
1575
1576 err = i40evf_alloc_q_vectors(adapter);
1577 if (err) {
1578 dev_err(&adapter->pdev->dev,
1579 "Unable to allocate memory for queue vectors\n");
1580 goto err_alloc_q_vectors;
1581 }
1582
1583 err = i40evf_alloc_queues(adapter);
1584 if (err) {
1585 dev_err(&adapter->pdev->dev,
1586 "Unable to allocate memory for queues\n");
1587 goto err_alloc_queues;
1588 }
1589
1590 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1591 (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1592 adapter->num_active_queues);
1593
1594 return 0;
1595 err_alloc_queues:
1596 i40evf_free_q_vectors(adapter);
1597 err_alloc_q_vectors:
1598 i40evf_reset_interrupt_capability(adapter);
1599 err_set_interrupt:
1600 return err;
1601 }
1602
1603 /**
1604 * i40evf_clear_rss_config_user - Clear user configurations of RSS
1605 * @vsi: Pointer to VSI structure
1606 **/
1607 static void i40evf_clear_rss_config_user(struct i40e_vsi *vsi)
1608 {
1609 if (!vsi)
1610 return;
1611
1612 kfree(vsi->rss_hkey_user);
1613 vsi->rss_hkey_user = NULL;
1614
1615 kfree(vsi->rss_lut_user);
1616 vsi->rss_lut_user = NULL;
1617 }
1618
1619 /**
1620 * i40evf_watchdog_timer - Periodic call-back timer
1621 * @data: pointer to adapter disguised as unsigned long
1622 **/
1623 static void i40evf_watchdog_timer(unsigned long data)
1624 {
1625 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1626
1627 schedule_work(&adapter->watchdog_task);
1628 /* timer will be rescheduled in watchdog task */
1629 }
1630
1631 /**
1632 * i40evf_watchdog_task - Periodic call-back task
1633 * @work: pointer to work_struct
1634 **/
1635 static void i40evf_watchdog_task(struct work_struct *work)
1636 {
1637 struct i40evf_adapter *adapter = container_of(work,
1638 struct i40evf_adapter,
1639 watchdog_task);
1640 struct i40e_hw *hw = &adapter->hw;
1641 u32 reg_val;
1642
1643 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1644 goto restart_watchdog;
1645
1646 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1647 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1648 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1649 if ((reg_val == I40E_VFR_VFACTIVE) ||
1650 (reg_val == I40E_VFR_COMPLETED)) {
1651 /* A chance for redemption! */
1652 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1653 adapter->state = __I40EVF_STARTUP;
1654 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1655 schedule_delayed_work(&adapter->init_task, 10);
1656 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1657 &adapter->crit_section);
1658 /* Don't reschedule the watchdog, since we've restarted
1659 * the init task. When init_task contacts the PF and
1660 * gets everything set up again, it'll restart the
1661 * watchdog for us. Down, boy. Sit. Stay. Woof.
1662 */
1663 return;
1664 }
1665 adapter->aq_required = 0;
1666 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1667 goto watchdog_done;
1668 }
1669
1670 if ((adapter->state < __I40EVF_DOWN) ||
1671 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1672 goto watchdog_done;
1673
1674 /* check for reset */
1675 reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
1676 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
1677 adapter->state = __I40EVF_RESETTING;
1678 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1679 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1680 schedule_work(&adapter->reset_task);
1681 adapter->aq_required = 0;
1682 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1683 goto watchdog_done;
1684 }
1685
1686 /* Process admin queue tasks. After init, everything gets done
1687 * here so we don't race on the admin queue.
1688 */
1689 if (adapter->current_op) {
1690 if (!i40evf_asq_done(hw)) {
1691 dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1692 i40evf_send_api_ver(adapter);
1693 }
1694 goto watchdog_done;
1695 }
1696 if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
1697 i40evf_send_vf_config_msg(adapter);
1698 goto watchdog_done;
1699 }
1700
1701 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1702 i40evf_disable_queues(adapter);
1703 goto watchdog_done;
1704 }
1705
1706 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1707 i40evf_map_queues(adapter);
1708 goto watchdog_done;
1709 }
1710
1711 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1712 i40evf_add_ether_addrs(adapter);
1713 goto watchdog_done;
1714 }
1715
1716 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1717 i40evf_add_vlans(adapter);
1718 goto watchdog_done;
1719 }
1720
1721 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1722 i40evf_del_ether_addrs(adapter);
1723 goto watchdog_done;
1724 }
1725
1726 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1727 i40evf_del_vlans(adapter);
1728 goto watchdog_done;
1729 }
1730
1731 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1732 i40evf_configure_queues(adapter);
1733 goto watchdog_done;
1734 }
1735
1736 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1737 i40evf_enable_queues(adapter);
1738 goto watchdog_done;
1739 }
1740
1741 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
1742 /* This message goes straight to the firmware, not the
1743 * PF, so we don't have to set current_op as we will
1744 * not get a response through the ARQ.
1745 */
1746 i40evf_init_rss(adapter);
1747 adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
1748 goto watchdog_done;
1749 }
1750
1751 if (adapter->state == __I40EVF_RUNNING)
1752 i40evf_request_stats(adapter);
1753 watchdog_done:
1754 if (adapter->state == __I40EVF_RUNNING) {
1755 i40evf_irq_enable_queues(adapter, ~0);
1756 i40evf_fire_sw_int(adapter, 0xFF);
1757 } else {
1758 i40evf_fire_sw_int(adapter, 0x1);
1759 }
1760
1761 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1762 restart_watchdog:
1763 if (adapter->state == __I40EVF_REMOVE)
1764 return;
1765 if (adapter->aq_required)
1766 mod_timer(&adapter->watchdog_timer,
1767 jiffies + msecs_to_jiffies(20));
1768 else
1769 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1770 schedule_work(&adapter->adminq_task);
1771 }
1772
1773 #define I40EVF_RESET_WAIT_MS 10
1774 #define I40EVF_RESET_WAIT_COUNT 500
1775 /**
1776 * i40evf_reset_task - Call-back task to handle hardware reset
1777 * @work: pointer to work_struct
1778 *
1779 * During reset we need to shut down and reinitialize the admin queue
1780 * before we can use it to communicate with the PF again. We also clear
1781 * and reinit the rings because that context is lost as well.
1782 **/
1783 static void i40evf_reset_task(struct work_struct *work)
1784 {
1785 struct i40evf_adapter *adapter = container_of(work,
1786 struct i40evf_adapter,
1787 reset_task);
1788 struct net_device *netdev = adapter->netdev;
1789 struct i40e_hw *hw = &adapter->hw;
1790 struct i40evf_vlan_filter *vlf;
1791 struct i40evf_mac_filter *f;
1792 u32 reg_val;
1793 int i = 0, err;
1794
1795 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1796 &adapter->crit_section))
1797 usleep_range(500, 1000);
1798
1799 i40evf_misc_irq_disable(adapter);
1800 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1801 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1802 /* Restart the AQ here. If we have been reset but didn't
1803 * detect it, or if the PF had to reinit, our AQ will be hosed.
1804 */
1805 i40evf_shutdown_adminq(hw);
1806 i40evf_init_adminq(hw);
1807 i40evf_request_reset(adapter);
1808 }
1809 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1810
1811 /* poll until we see the reset actually happen */
1812 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1813 reg_val = rd32(hw, I40E_VF_ARQLEN1) &
1814 I40E_VF_ARQLEN1_ARQENABLE_MASK;
1815 if (!reg_val)
1816 break;
1817 usleep_range(5000, 10000);
1818 }
1819 if (i == I40EVF_RESET_WAIT_COUNT) {
1820 dev_info(&adapter->pdev->dev, "Never saw reset\n");
1821 goto continue_reset; /* act like the reset happened */
1822 }
1823
1824 /* wait until the reset is complete and the PF is responding to us */
1825 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1826 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1827 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1828 if (reg_val == I40E_VFR_VFACTIVE)
1829 break;
1830 msleep(I40EVF_RESET_WAIT_MS);
1831 }
1832 pci_set_master(adapter->pdev);
1833 /* extra wait to make sure minimum wait is met */
1834 msleep(I40EVF_RESET_WAIT_MS);
1835 if (i == I40EVF_RESET_WAIT_COUNT) {
1836 struct i40evf_mac_filter *ftmp;
1837 struct i40evf_vlan_filter *fv, *fvtmp;
1838
1839 /* reset never finished */
1840 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1841 reg_val);
1842 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1843
1844 if (netif_running(adapter->netdev)) {
1845 set_bit(__I40E_DOWN, &adapter->vsi.state);
1846 netif_carrier_off(netdev);
1847 netif_tx_disable(netdev);
1848 i40evf_napi_disable_all(adapter);
1849 i40evf_irq_disable(adapter);
1850 i40evf_free_traffic_irqs(adapter);
1851 i40evf_free_all_tx_resources(adapter);
1852 i40evf_free_all_rx_resources(adapter);
1853 }
1854
1855 /* Delete all of the filters, both MAC and VLAN. */
1856 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1857 list) {
1858 list_del(&f->list);
1859 kfree(f);
1860 }
1861
1862 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1863 list) {
1864 list_del(&fv->list);
1865 kfree(fv);
1866 }
1867
1868 i40evf_free_misc_irq(adapter);
1869 i40evf_reset_interrupt_capability(adapter);
1870 i40evf_free_queues(adapter);
1871 i40evf_free_q_vectors(adapter);
1872 kfree(adapter->vf_res);
1873 i40evf_shutdown_adminq(hw);
1874 adapter->netdev->flags &= ~IFF_UP;
1875 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1876 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1877 adapter->state = __I40EVF_DOWN;
1878 dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
1879 return; /* Do not attempt to reinit. It's dead, Jim. */
1880 }
1881
1882 continue_reset:
1883 if (netif_running(adapter->netdev)) {
1884 netif_carrier_off(netdev);
1885 netif_tx_stop_all_queues(netdev);
1886 i40evf_napi_disable_all(adapter);
1887 }
1888 i40evf_irq_disable(adapter);
1889
1890 adapter->state = __I40EVF_RESETTING;
1891 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1892
1893 /* free the Tx/Rx rings and descriptors, might be better to just
1894 * re-use them sometime in the future
1895 */
1896 i40evf_free_all_rx_resources(adapter);
1897 i40evf_free_all_tx_resources(adapter);
1898
1899 /* kill and reinit the admin queue */
1900 if (i40evf_shutdown_adminq(hw))
1901 dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
1902 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1903 err = i40evf_init_adminq(hw);
1904 if (err)
1905 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1906 err);
1907
1908 adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG;
1909 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
1910
1911 /* re-add all MAC filters */
1912 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1913 f->add = true;
1914 }
1915 /* re-add all VLAN filters */
1916 list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
1917 vlf->add = true;
1918 }
1919 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1920 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1921 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1922 i40evf_misc_irq_enable(adapter);
1923
1924 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1925
1926 if (netif_running(adapter->netdev)) {
1927 /* allocate transmit descriptors */
1928 err = i40evf_setup_all_tx_resources(adapter);
1929 if (err)
1930 goto reset_err;
1931
1932 /* allocate receive descriptors */
1933 err = i40evf_setup_all_rx_resources(adapter);
1934 if (err)
1935 goto reset_err;
1936
1937 i40evf_configure(adapter);
1938
1939 err = i40evf_up_complete(adapter);
1940 if (err)
1941 goto reset_err;
1942
1943 i40evf_irq_enable(adapter, true);
1944 } else {
1945 adapter->state = __I40EVF_DOWN;
1946 }
1947
1948 return;
1949 reset_err:
1950 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1951 i40evf_close(adapter->netdev);
1952 }
1953
1954 /**
1955 * i40evf_adminq_task - worker thread to clean the admin queue
1956 * @work: pointer to work_struct containing our data
1957 **/
1958 static void i40evf_adminq_task(struct work_struct *work)
1959 {
1960 struct i40evf_adapter *adapter =
1961 container_of(work, struct i40evf_adapter, adminq_task);
1962 struct i40e_hw *hw = &adapter->hw;
1963 struct i40e_arq_event_info event;
1964 struct i40e_virtchnl_msg *v_msg;
1965 i40e_status ret;
1966 u32 val, oldval;
1967 u16 pending;
1968
1969 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1970 goto out;
1971
1972 event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1973 event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1974 if (!event.msg_buf)
1975 goto out;
1976
1977 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1978 do {
1979 ret = i40evf_clean_arq_element(hw, &event, &pending);
1980 if (ret || !v_msg->v_opcode)
1981 break; /* No event to process or error cleaning ARQ */
1982
1983 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1984 v_msg->v_retval, event.msg_buf,
1985 event.msg_len);
1986 if (pending != 0)
1987 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1988 } while (pending);
1989
1990 if ((adapter->flags &
1991 (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
1992 adapter->state == __I40EVF_RESETTING)
1993 goto freedom;
1994
1995 /* check for error indications */
1996 val = rd32(hw, hw->aq.arq.len);
1997 if (val == 0xdeadbeef) /* indicates device in reset */
1998 goto freedom;
1999 oldval = val;
2000 if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
2001 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
2002 val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
2003 }
2004 if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
2005 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
2006 val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
2007 }
2008 if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
2009 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
2010 val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
2011 }
2012 if (oldval != val)
2013 wr32(hw, hw->aq.arq.len, val);
2014
2015 val = rd32(hw, hw->aq.asq.len);
2016 oldval = val;
2017 if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
2018 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
2019 val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
2020 }
2021 if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
2022 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
2023 val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
2024 }
2025 if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
2026 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
2027 val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
2028 }
2029 if (oldval != val)
2030 wr32(hw, hw->aq.asq.len, val);
2031
2032 freedom:
2033 kfree(event.msg_buf);
2034 out:
2035 /* re-enable Admin queue interrupt cause */
2036 i40evf_misc_irq_enable(adapter);
2037 }
2038
2039 /**
2040 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
2041 * @adapter: board private structure
2042 *
2043 * Free all transmit software resources
2044 **/
2045 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
2046 {
2047 int i;
2048
2049 if (!adapter->tx_rings)
2050 return;
2051
2052 for (i = 0; i < adapter->num_active_queues; i++)
2053 if (adapter->tx_rings[i].desc)
2054 i40evf_free_tx_resources(&adapter->tx_rings[i]);
2055 }
2056
2057 /**
2058 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
2059 * @adapter: board private structure
2060 *
2061 * If this function returns with an error, then it's possible one or
2062 * more of the rings is populated (while the rest are not). It is the
2063 * callers duty to clean those orphaned rings.
2064 *
2065 * Return 0 on success, negative on failure
2066 **/
2067 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
2068 {
2069 int i, err = 0;
2070
2071 for (i = 0; i < adapter->num_active_queues; i++) {
2072 adapter->tx_rings[i].count = adapter->tx_desc_count;
2073 err = i40evf_setup_tx_descriptors(&adapter->tx_rings[i]);
2074 if (!err)
2075 continue;
2076 dev_err(&adapter->pdev->dev,
2077 "Allocation for Tx Queue %u failed\n", i);
2078 break;
2079 }
2080
2081 return err;
2082 }
2083
2084 /**
2085 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
2086 * @adapter: board private structure
2087 *
2088 * If this function returns with an error, then it's possible one or
2089 * more of the rings is populated (while the rest are not). It is the
2090 * callers duty to clean those orphaned rings.
2091 *
2092 * Return 0 on success, negative on failure
2093 **/
2094 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
2095 {
2096 int i, err = 0;
2097
2098 for (i = 0; i < adapter->num_active_queues; i++) {
2099 adapter->rx_rings[i].count = adapter->rx_desc_count;
2100 err = i40evf_setup_rx_descriptors(&adapter->rx_rings[i]);
2101 if (!err)
2102 continue;
2103 dev_err(&adapter->pdev->dev,
2104 "Allocation for Rx Queue %u failed\n", i);
2105 break;
2106 }
2107 return err;
2108 }
2109
2110 /**
2111 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
2112 * @adapter: board private structure
2113 *
2114 * Free all receive software resources
2115 **/
2116 void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
2117 {
2118 int i;
2119
2120 if (!adapter->rx_rings)
2121 return;
2122
2123 for (i = 0; i < adapter->num_active_queues; i++)
2124 if (adapter->rx_rings[i].desc)
2125 i40evf_free_rx_resources(&adapter->rx_rings[i]);
2126 }
2127
2128 /**
2129 * i40evf_open - Called when a network interface is made active
2130 * @netdev: network interface device structure
2131 *
2132 * Returns 0 on success, negative value on failure
2133 *
2134 * The open entry point is called when a network interface is made
2135 * active by the system (IFF_UP). At this point all resources needed
2136 * for transmit and receive operations are allocated, the interrupt
2137 * handler is registered with the OS, the watchdog timer is started,
2138 * and the stack is notified that the interface is ready.
2139 **/
2140 static int i40evf_open(struct net_device *netdev)
2141 {
2142 struct i40evf_adapter *adapter = netdev_priv(netdev);
2143 int err;
2144
2145 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
2146 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
2147 return -EIO;
2148 }
2149
2150 if (adapter->state != __I40EVF_DOWN)
2151 return -EBUSY;
2152
2153 /* allocate transmit descriptors */
2154 err = i40evf_setup_all_tx_resources(adapter);
2155 if (err)
2156 goto err_setup_tx;
2157
2158 /* allocate receive descriptors */
2159 err = i40evf_setup_all_rx_resources(adapter);
2160 if (err)
2161 goto err_setup_rx;
2162
2163 /* clear any pending interrupts, may auto mask */
2164 err = i40evf_request_traffic_irqs(adapter, netdev->name);
2165 if (err)
2166 goto err_req_irq;
2167
2168 i40evf_add_filter(adapter, adapter->hw.mac.addr);
2169 i40evf_configure(adapter);
2170
2171 err = i40evf_up_complete(adapter);
2172 if (err)
2173 goto err_req_irq;
2174
2175 i40evf_irq_enable(adapter, true);
2176
2177 return 0;
2178
2179 err_req_irq:
2180 i40evf_down(adapter);
2181 i40evf_free_traffic_irqs(adapter);
2182 err_setup_rx:
2183 i40evf_free_all_rx_resources(adapter);
2184 err_setup_tx:
2185 i40evf_free_all_tx_resources(adapter);
2186
2187 return err;
2188 }
2189
2190 /**
2191 * i40evf_close - Disables a network interface
2192 * @netdev: network interface device structure
2193 *
2194 * Returns 0, this is not allowed to fail
2195 *
2196 * The close entry point is called when an interface is de-activated
2197 * by the OS. The hardware is still under the drivers control, but
2198 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
2199 * are freed, along with all transmit and receive resources.
2200 **/
2201 static int i40evf_close(struct net_device *netdev)
2202 {
2203 struct i40evf_adapter *adapter = netdev_priv(netdev);
2204
2205 if (adapter->state <= __I40EVF_DOWN_PENDING)
2206 return 0;
2207
2208
2209 set_bit(__I40E_DOWN, &adapter->vsi.state);
2210
2211 i40evf_down(adapter);
2212 adapter->state = __I40EVF_DOWN_PENDING;
2213 i40evf_free_traffic_irqs(adapter);
2214
2215 return 0;
2216 }
2217
2218 /**
2219 * i40evf_get_stats - Get System Network Statistics
2220 * @netdev: network interface device structure
2221 *
2222 * Returns the address of the device statistics structure.
2223 * The statistics are actually updated from the timer callback.
2224 **/
2225 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
2226 {
2227 struct i40evf_adapter *adapter = netdev_priv(netdev);
2228
2229 /* only return the current stats */
2230 return &adapter->net_stats;
2231 }
2232
2233 /**
2234 * i40evf_change_mtu - Change the Maximum Transfer Unit
2235 * @netdev: network interface device structure
2236 * @new_mtu: new value for maximum frame size
2237 *
2238 * Returns 0 on success, negative on failure
2239 **/
2240 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
2241 {
2242 struct i40evf_adapter *adapter = netdev_priv(netdev);
2243 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2244
2245 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
2246 return -EINVAL;
2247
2248 netdev->mtu = new_mtu;
2249 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
2250 schedule_work(&adapter->reset_task);
2251
2252 return 0;
2253 }
2254
2255 #define I40EVF_VLAN_FEATURES (NETIF_F_HW_VLAN_CTAG_TX |\
2256 NETIF_F_HW_VLAN_CTAG_RX |\
2257 NETIF_F_HW_VLAN_CTAG_FILTER)
2258
2259 /**
2260 * i40evf_fix_features - fix up the netdev feature bits
2261 * @netdev: our net device
2262 * @features: desired feature bits
2263 *
2264 * Returns fixed-up features bits
2265 **/
2266 static netdev_features_t i40evf_fix_features(struct net_device *netdev,
2267 netdev_features_t features)
2268 {
2269 struct i40evf_adapter *adapter = netdev_priv(netdev);
2270
2271 features &= ~I40EVF_VLAN_FEATURES;
2272 if (adapter->vf_res->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_VLAN)
2273 features |= I40EVF_VLAN_FEATURES;
2274 return features;
2275 }
2276
2277 static const struct net_device_ops i40evf_netdev_ops = {
2278 .ndo_open = i40evf_open,
2279 .ndo_stop = i40evf_close,
2280 .ndo_start_xmit = i40evf_xmit_frame,
2281 .ndo_get_stats = i40evf_get_stats,
2282 .ndo_set_rx_mode = i40evf_set_rx_mode,
2283 .ndo_validate_addr = eth_validate_addr,
2284 .ndo_set_mac_address = i40evf_set_mac,
2285 .ndo_change_mtu = i40evf_change_mtu,
2286 .ndo_tx_timeout = i40evf_tx_timeout,
2287 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
2288 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
2289 .ndo_fix_features = i40evf_fix_features,
2290 #ifdef CONFIG_NET_POLL_CONTROLLER
2291 .ndo_poll_controller = i40evf_netpoll,
2292 #endif
2293 };
2294
2295 /**
2296 * i40evf_check_reset_complete - check that VF reset is complete
2297 * @hw: pointer to hw struct
2298 *
2299 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
2300 **/
2301 static int i40evf_check_reset_complete(struct i40e_hw *hw)
2302 {
2303 u32 rstat;
2304 int i;
2305
2306 for (i = 0; i < 100; i++) {
2307 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
2308 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
2309 if ((rstat == I40E_VFR_VFACTIVE) ||
2310 (rstat == I40E_VFR_COMPLETED))
2311 return 0;
2312 usleep_range(10, 20);
2313 }
2314 return -EBUSY;
2315 }
2316
2317 /**
2318 * i40evf_process_config - Process the config information we got from the PF
2319 * @adapter: board private structure
2320 *
2321 * Verify that we have a valid config struct, and set up our netdev features
2322 * and our VSI struct.
2323 **/
2324 int i40evf_process_config(struct i40evf_adapter *adapter)
2325 {
2326 struct i40e_virtchnl_vf_resource *vfres = adapter->vf_res;
2327 struct net_device *netdev = adapter->netdev;
2328 int i;
2329
2330 /* got VF config message back from PF, now we can parse it */
2331 for (i = 0; i < vfres->num_vsis; i++) {
2332 if (vfres->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2333 adapter->vsi_res = &vfres->vsi_res[i];
2334 }
2335 if (!adapter->vsi_res) {
2336 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
2337 return -ENODEV;
2338 }
2339
2340 netdev->features |= NETIF_F_HIGHDMA |
2341 NETIF_F_SG |
2342 NETIF_F_IP_CSUM |
2343 NETIF_F_SCTP_CRC |
2344 NETIF_F_IPV6_CSUM |
2345 NETIF_F_TSO |
2346 NETIF_F_TSO6 |
2347 NETIF_F_TSO_ECN |
2348 NETIF_F_GSO_GRE |
2349 NETIF_F_GSO_UDP_TUNNEL |
2350 NETIF_F_RXCSUM |
2351 NETIF_F_GRO;
2352
2353 netdev->hw_enc_features |= NETIF_F_IP_CSUM |
2354 NETIF_F_IPV6_CSUM |
2355 NETIF_F_TSO |
2356 NETIF_F_TSO6 |
2357 NETIF_F_TSO_ECN |
2358 NETIF_F_GSO_GRE |
2359 NETIF_F_GSO_UDP_TUNNEL |
2360 NETIF_F_GSO_UDP_TUNNEL_CSUM;
2361
2362 if (adapter->flags & I40EVF_FLAG_OUTER_UDP_CSUM_CAPABLE)
2363 netdev->features |= NETIF_F_GSO_UDP_TUNNEL_CSUM;
2364
2365 /* always clear VLAN features because they can change at every reset */
2366 netdev->features &= ~(I40EVF_VLAN_FEATURES);
2367 /* copy netdev features into list of user selectable features */
2368 netdev->hw_features |= netdev->features;
2369
2370 if (vfres->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2371 netdev->vlan_features = netdev->features;
2372 netdev->features |= I40EVF_VLAN_FEATURES;
2373 }
2374
2375 adapter->vsi.id = adapter->vsi_res->vsi_id;
2376
2377 adapter->vsi.back = adapter;
2378 adapter->vsi.base_vector = 1;
2379 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2380 adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2381 ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2382 adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2383 ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2384 adapter->vsi.netdev = adapter->netdev;
2385 adapter->vsi.qs_handle = adapter->vsi_res->qset_handle;
2386 return 0;
2387 }
2388
2389 /**
2390 * i40evf_init_task - worker thread to perform delayed initialization
2391 * @work: pointer to work_struct containing our data
2392 *
2393 * This task completes the work that was begun in probe. Due to the nature
2394 * of VF-PF communications, we may need to wait tens of milliseconds to get
2395 * responses back from the PF. Rather than busy-wait in probe and bog down the
2396 * whole system, we'll do it in a task so we can sleep.
2397 * This task only runs during driver init. Once we've established
2398 * communications with the PF driver and set up our netdev, the watchdog
2399 * takes over.
2400 **/
2401 static void i40evf_init_task(struct work_struct *work)
2402 {
2403 struct i40evf_adapter *adapter = container_of(work,
2404 struct i40evf_adapter,
2405 init_task.work);
2406 struct net_device *netdev = adapter->netdev;
2407 struct i40e_hw *hw = &adapter->hw;
2408 struct pci_dev *pdev = adapter->pdev;
2409 int err, bufsz;
2410
2411 switch (adapter->state) {
2412 case __I40EVF_STARTUP:
2413 /* driver loaded, probe complete */
2414 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2415 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2416 err = i40e_set_mac_type(hw);
2417 if (err) {
2418 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2419 err);
2420 goto err;
2421 }
2422 err = i40evf_check_reset_complete(hw);
2423 if (err) {
2424 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2425 err);
2426 goto err;
2427 }
2428 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2429 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2430 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2431 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2432
2433 err = i40evf_init_adminq(hw);
2434 if (err) {
2435 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2436 err);
2437 goto err;
2438 }
2439 err = i40evf_send_api_ver(adapter);
2440 if (err) {
2441 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2442 i40evf_shutdown_adminq(hw);
2443 goto err;
2444 }
2445 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2446 goto restart;
2447 case __I40EVF_INIT_VERSION_CHECK:
2448 if (!i40evf_asq_done(hw)) {
2449 dev_err(&pdev->dev, "Admin queue command never completed\n");
2450 i40evf_shutdown_adminq(hw);
2451 adapter->state = __I40EVF_STARTUP;
2452 goto err;
2453 }
2454
2455 /* aq msg sent, awaiting reply */
2456 err = i40evf_verify_api_ver(adapter);
2457 if (err) {
2458 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2459 err = i40evf_send_api_ver(adapter);
2460 else
2461 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
2462 adapter->pf_version.major,
2463 adapter->pf_version.minor,
2464 I40E_VIRTCHNL_VERSION_MAJOR,
2465 I40E_VIRTCHNL_VERSION_MINOR);
2466 goto err;
2467 }
2468 err = i40evf_send_vf_config_msg(adapter);
2469 if (err) {
2470 dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2471 err);
2472 goto err;
2473 }
2474 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2475 goto restart;
2476 case __I40EVF_INIT_GET_RESOURCES:
2477 /* aq msg sent, awaiting reply */
2478 if (!adapter->vf_res) {
2479 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2480 (I40E_MAX_VF_VSI *
2481 sizeof(struct i40e_virtchnl_vsi_resource));
2482 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2483 if (!adapter->vf_res)
2484 goto err;
2485 }
2486 err = i40evf_get_vf_config(adapter);
2487 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2488 err = i40evf_send_vf_config_msg(adapter);
2489 goto err;
2490 } else if (err == I40E_ERR_PARAM) {
2491 /* We only get ERR_PARAM if the device is in a very bad
2492 * state or if we've been disabled for previous bad
2493 * behavior. Either way, we're done now.
2494 */
2495 i40evf_shutdown_adminq(hw);
2496 dev_err(&pdev->dev, "Unable to get VF config due to PF error condition, not retrying\n");
2497 return;
2498 }
2499 if (err) {
2500 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2501 err);
2502 goto err_alloc;
2503 }
2504 adapter->state = __I40EVF_INIT_SW;
2505 break;
2506 default:
2507 goto err_alloc;
2508 }
2509
2510 if (hw->mac.type == I40E_MAC_X722_VF)
2511 adapter->flags |= I40EVF_FLAG_OUTER_UDP_CSUM_CAPABLE;
2512
2513 if (i40evf_process_config(adapter))
2514 goto err_alloc;
2515 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
2516
2517 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2518 adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
2519 adapter->flags |= I40EVF_FLAG_RX_PS_CAPABLE;
2520
2521 /* Default to single buffer rx, can be changed through ethtool. */
2522 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
2523
2524 netdev->netdev_ops = &i40evf_netdev_ops;
2525 i40evf_set_ethtool_ops(netdev);
2526 netdev->watchdog_timeo = 5 * HZ;
2527
2528 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2529 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2530 adapter->hw.mac.addr);
2531 eth_hw_addr_random(netdev);
2532 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
2533 } else {
2534 adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF;
2535 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2536 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2537 }
2538
2539 init_timer(&adapter->watchdog_timer);
2540 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2541 adapter->watchdog_timer.data = (unsigned long)adapter;
2542 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2543
2544 adapter->num_active_queues = min_t(int,
2545 adapter->vsi_res->num_queue_pairs,
2546 (int)(num_online_cpus()));
2547 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2548 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2549 err = i40evf_init_interrupt_scheme(adapter);
2550 if (err)
2551 goto err_sw_init;
2552 i40evf_map_rings_to_vectors(adapter);
2553 if (adapter->vf_res->vf_offload_flags &
2554 I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
2555 adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
2556
2557 err = i40evf_request_misc_irq(adapter);
2558 if (err)
2559 goto err_sw_init;
2560
2561 netif_carrier_off(netdev);
2562
2563 if (!adapter->netdev_registered) {
2564 err = register_netdev(netdev);
2565 if (err)
2566 goto err_register;
2567 }
2568
2569 adapter->netdev_registered = true;
2570
2571 netif_tx_stop_all_queues(netdev);
2572
2573 dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2574 if (netdev->features & NETIF_F_GRO)
2575 dev_info(&pdev->dev, "GRO is enabled\n");
2576
2577 adapter->state = __I40EVF_DOWN;
2578 set_bit(__I40E_DOWN, &adapter->vsi.state);
2579 i40evf_misc_irq_enable(adapter);
2580
2581 if (RSS_AQ(adapter)) {
2582 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
2583 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
2584 } else {
2585 i40evf_init_rss(adapter);
2586 }
2587 return;
2588 restart:
2589 schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
2590 return;
2591
2592 err_register:
2593 i40evf_free_misc_irq(adapter);
2594 err_sw_init:
2595 i40evf_reset_interrupt_capability(adapter);
2596 err_alloc:
2597 kfree(adapter->vf_res);
2598 adapter->vf_res = NULL;
2599 err:
2600 /* Things went into the weeds, so try again later */
2601 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2602 dev_err(&pdev->dev, "Failed to communicate with PF; waiting before retry\n");
2603 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2604 i40evf_shutdown_adminq(hw);
2605 adapter->state = __I40EVF_STARTUP;
2606 schedule_delayed_work(&adapter->init_task, HZ * 5);
2607 return;
2608 }
2609 schedule_delayed_work(&adapter->init_task, HZ);
2610 }
2611
2612 /**
2613 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2614 * @pdev: pci device structure
2615 **/
2616 static void i40evf_shutdown(struct pci_dev *pdev)
2617 {
2618 struct net_device *netdev = pci_get_drvdata(pdev);
2619 struct i40evf_adapter *adapter = netdev_priv(netdev);
2620
2621 netif_device_detach(netdev);
2622
2623 if (netif_running(netdev))
2624 i40evf_close(netdev);
2625
2626 /* Prevent the watchdog from running. */
2627 adapter->state = __I40EVF_REMOVE;
2628 adapter->aq_required = 0;
2629
2630 #ifdef CONFIG_PM
2631 pci_save_state(pdev);
2632
2633 #endif
2634 pci_disable_device(pdev);
2635 }
2636
2637 /**
2638 * i40evf_probe - Device Initialization Routine
2639 * @pdev: PCI device information struct
2640 * @ent: entry in i40evf_pci_tbl
2641 *
2642 * Returns 0 on success, negative on failure
2643 *
2644 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2645 * The OS initialization, configuring of the adapter private structure,
2646 * and a hardware reset occur.
2647 **/
2648 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2649 {
2650 struct net_device *netdev;
2651 struct i40evf_adapter *adapter = NULL;
2652 struct i40e_hw *hw = NULL;
2653 int err;
2654
2655 err = pci_enable_device(pdev);
2656 if (err)
2657 return err;
2658
2659 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2660 if (err) {
2661 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2662 if (err) {
2663 dev_err(&pdev->dev,
2664 "DMA configuration failed: 0x%x\n", err);
2665 goto err_dma;
2666 }
2667 }
2668
2669 err = pci_request_regions(pdev, i40evf_driver_name);
2670 if (err) {
2671 dev_err(&pdev->dev,
2672 "pci_request_regions failed 0x%x\n", err);
2673 goto err_pci_reg;
2674 }
2675
2676 pci_enable_pcie_error_reporting(pdev);
2677
2678 pci_set_master(pdev);
2679
2680 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter), MAX_QUEUES);
2681 if (!netdev) {
2682 err = -ENOMEM;
2683 goto err_alloc_etherdev;
2684 }
2685
2686 SET_NETDEV_DEV(netdev, &pdev->dev);
2687
2688 pci_set_drvdata(pdev, netdev);
2689 adapter = netdev_priv(netdev);
2690
2691 adapter->netdev = netdev;
2692 adapter->pdev = pdev;
2693
2694 hw = &adapter->hw;
2695 hw->back = adapter;
2696
2697 adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2698 adapter->state = __I40EVF_STARTUP;
2699
2700 /* Call save state here because it relies on the adapter struct. */
2701 pci_save_state(pdev);
2702
2703 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2704 pci_resource_len(pdev, 0));
2705 if (!hw->hw_addr) {
2706 err = -EIO;
2707 goto err_ioremap;
2708 }
2709 hw->vendor_id = pdev->vendor;
2710 hw->device_id = pdev->device;
2711 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2712 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2713 hw->subsystem_device_id = pdev->subsystem_device;
2714 hw->bus.device = PCI_SLOT(pdev->devfn);
2715 hw->bus.func = PCI_FUNC(pdev->devfn);
2716
2717 /* set up the locks for the AQ, do this only once in probe
2718 * and destroy them only once in remove
2719 */
2720 mutex_init(&hw->aq.asq_mutex);
2721 mutex_init(&hw->aq.arq_mutex);
2722
2723 INIT_LIST_HEAD(&adapter->mac_filter_list);
2724 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2725
2726 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2727 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2728 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2729 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2730 schedule_delayed_work(&adapter->init_task,
2731 msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
2732
2733 return 0;
2734
2735 err_ioremap:
2736 free_netdev(netdev);
2737 err_alloc_etherdev:
2738 pci_release_regions(pdev);
2739 err_pci_reg:
2740 err_dma:
2741 pci_disable_device(pdev);
2742 return err;
2743 }
2744
2745 #ifdef CONFIG_PM
2746 /**
2747 * i40evf_suspend - Power management suspend routine
2748 * @pdev: PCI device information struct
2749 * @state: unused
2750 *
2751 * Called when the system (VM) is entering sleep/suspend.
2752 **/
2753 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2754 {
2755 struct net_device *netdev = pci_get_drvdata(pdev);
2756 struct i40evf_adapter *adapter = netdev_priv(netdev);
2757 int retval = 0;
2758
2759 netif_device_detach(netdev);
2760
2761 if (netif_running(netdev)) {
2762 rtnl_lock();
2763 i40evf_down(adapter);
2764 rtnl_unlock();
2765 }
2766 i40evf_free_misc_irq(adapter);
2767 i40evf_reset_interrupt_capability(adapter);
2768
2769 retval = pci_save_state(pdev);
2770 if (retval)
2771 return retval;
2772
2773 pci_disable_device(pdev);
2774
2775 return 0;
2776 }
2777
2778 /**
2779 * i40evf_resume - Power management resume routine
2780 * @pdev: PCI device information struct
2781 *
2782 * Called when the system (VM) is resumed from sleep/suspend.
2783 **/
2784 static int i40evf_resume(struct pci_dev *pdev)
2785 {
2786 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2787 struct net_device *netdev = adapter->netdev;
2788 u32 err;
2789
2790 pci_set_power_state(pdev, PCI_D0);
2791 pci_restore_state(pdev);
2792 /* pci_restore_state clears dev->state_saved so call
2793 * pci_save_state to restore it.
2794 */
2795 pci_save_state(pdev);
2796
2797 err = pci_enable_device_mem(pdev);
2798 if (err) {
2799 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2800 return err;
2801 }
2802 pci_set_master(pdev);
2803
2804 rtnl_lock();
2805 err = i40evf_set_interrupt_capability(adapter);
2806 if (err) {
2807 rtnl_unlock();
2808 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2809 return err;
2810 }
2811 err = i40evf_request_misc_irq(adapter);
2812 rtnl_unlock();
2813 if (err) {
2814 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2815 return err;
2816 }
2817
2818 schedule_work(&adapter->reset_task);
2819
2820 netif_device_attach(netdev);
2821
2822 return err;
2823 }
2824
2825 #endif /* CONFIG_PM */
2826 /**
2827 * i40evf_remove - Device Removal Routine
2828 * @pdev: PCI device information struct
2829 *
2830 * i40evf_remove is called by the PCI subsystem to alert the driver
2831 * that it should release a PCI device. The could be caused by a
2832 * Hot-Plug event, or because the driver is going to be removed from
2833 * memory.
2834 **/
2835 static void i40evf_remove(struct pci_dev *pdev)
2836 {
2837 struct net_device *netdev = pci_get_drvdata(pdev);
2838 struct i40evf_adapter *adapter = netdev_priv(netdev);
2839 struct i40evf_mac_filter *f, *ftmp;
2840 struct i40e_hw *hw = &adapter->hw;
2841
2842 cancel_delayed_work_sync(&adapter->init_task);
2843 cancel_work_sync(&adapter->reset_task);
2844
2845 if (adapter->netdev_registered) {
2846 unregister_netdev(netdev);
2847 adapter->netdev_registered = false;
2848 }
2849
2850 /* Shut down all the garbage mashers on the detention level */
2851 adapter->state = __I40EVF_REMOVE;
2852 adapter->aq_required = 0;
2853 i40evf_request_reset(adapter);
2854 msleep(50);
2855 /* If the FW isn't responding, kick it once, but only once. */
2856 if (!i40evf_asq_done(hw)) {
2857 i40evf_request_reset(adapter);
2858 msleep(50);
2859 }
2860
2861 if (adapter->msix_entries) {
2862 i40evf_misc_irq_disable(adapter);
2863 i40evf_free_misc_irq(adapter);
2864 i40evf_reset_interrupt_capability(adapter);
2865 i40evf_free_q_vectors(adapter);
2866 }
2867
2868 if (adapter->watchdog_timer.function)
2869 del_timer_sync(&adapter->watchdog_timer);
2870
2871 flush_scheduled_work();
2872
2873 /* Clear user configurations for RSS */
2874 i40evf_clear_rss_config_user(&adapter->vsi);
2875
2876 if (hw->aq.asq.count)
2877 i40evf_shutdown_adminq(hw);
2878
2879 /* destroy the locks only once, here */
2880 mutex_destroy(&hw->aq.arq_mutex);
2881 mutex_destroy(&hw->aq.asq_mutex);
2882
2883 iounmap(hw->hw_addr);
2884 pci_release_regions(pdev);
2885
2886 i40evf_free_all_tx_resources(adapter);
2887 i40evf_free_all_rx_resources(adapter);
2888 i40evf_free_queues(adapter);
2889 kfree(adapter->vf_res);
2890 /* If we got removed before an up/down sequence, we've got a filter
2891 * hanging out there that we need to get rid of.
2892 */
2893 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2894 list_del(&f->list);
2895 kfree(f);
2896 }
2897 list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2898 list_del(&f->list);
2899 kfree(f);
2900 }
2901
2902 free_netdev(netdev);
2903
2904 pci_disable_pcie_error_reporting(pdev);
2905
2906 pci_disable_device(pdev);
2907 }
2908
2909 static struct pci_driver i40evf_driver = {
2910 .name = i40evf_driver_name,
2911 .id_table = i40evf_pci_tbl,
2912 .probe = i40evf_probe,
2913 .remove = i40evf_remove,
2914 #ifdef CONFIG_PM
2915 .suspend = i40evf_suspend,
2916 .resume = i40evf_resume,
2917 #endif
2918 .shutdown = i40evf_shutdown,
2919 };
2920
2921 /**
2922 * i40e_init_module - Driver Registration Routine
2923 *
2924 * i40e_init_module is the first routine called when the driver is
2925 * loaded. All it does is register with the PCI subsystem.
2926 **/
2927 static int __init i40evf_init_module(void)
2928 {
2929 int ret;
2930
2931 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2932 i40evf_driver_version);
2933
2934 pr_info("%s\n", i40evf_copyright);
2935
2936 i40evf_wq = create_singlethread_workqueue(i40evf_driver_name);
2937 if (!i40evf_wq) {
2938 pr_err("%s: Failed to create workqueue\n", i40evf_driver_name);
2939 return -ENOMEM;
2940 }
2941 ret = pci_register_driver(&i40evf_driver);
2942 return ret;
2943 }
2944
2945 module_init(i40evf_init_module);
2946
2947 /**
2948 * i40e_exit_module - Driver Exit Cleanup Routine
2949 *
2950 * i40e_exit_module is called just before the driver is removed
2951 * from memory.
2952 **/
2953 static void __exit i40evf_exit_module(void)
2954 {
2955 pci_unregister_driver(&i40evf_driver);
2956 destroy_workqueue(i40evf_wq);
2957 }
2958
2959 module_exit(i40evf_exit_module);
2960
2961 /* i40evf_main.c */
Linux kernel - Deliverables
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