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[deliverable/linux.git] / drivers / net / ethernet / intel / i40evf / i40evf_main.c
1 /*******************************************************************************
2 *
3 * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
4 * Copyright(c) 2013 - 2014 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 * The full GNU General Public License is included in this distribution in
16 * the file called "COPYING".
17 *
18 * Contact Information:
19 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
20 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
21 *
22 ******************************************************************************/
23
24 #include "i40evf.h"
25 #include "i40e_prototype.h"
26 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter);
27 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter);
28 static int i40evf_close(struct net_device *netdev);
29
30 char i40evf_driver_name[] = "i40evf";
31 static const char i40evf_driver_string[] =
32 "Intel(R) XL710 X710 Virtual Function Network Driver";
33
34 #define DRV_VERSION "0.9.12"
35 const char i40evf_driver_version[] = DRV_VERSION;
36 static const char i40evf_copyright[] =
37 "Copyright (c) 2013 - 2014 Intel Corporation.";
38
39 /* i40evf_pci_tbl - PCI Device ID Table
40 *
41 * Wildcard entries (PCI_ANY_ID) should come last
42 * Last entry must be all 0s
43 *
44 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
45 * Class, Class Mask, private data (not used) }
46 */
47 static DEFINE_PCI_DEVICE_TABLE(i40evf_pci_tbl) = {
48 {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
49 /* required last entry */
50 {0, }
51 };
52
53 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
54
55 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
56 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
57 MODULE_LICENSE("GPL");
58 MODULE_VERSION(DRV_VERSION);
59
60 /**
61 * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
62 * @hw: pointer to the HW structure
63 * @mem: ptr to mem struct to fill out
64 * @size: size of memory requested
65 * @alignment: what to align the allocation to
66 **/
67 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
68 struct i40e_dma_mem *mem,
69 u64 size, u32 alignment)
70 {
71 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
72
73 if (!mem)
74 return I40E_ERR_PARAM;
75
76 mem->size = ALIGN(size, alignment);
77 mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
78 (dma_addr_t *)&mem->pa, GFP_KERNEL);
79 if (mem->va)
80 return 0;
81 else
82 return I40E_ERR_NO_MEMORY;
83 }
84
85 /**
86 * i40evf_free_dma_mem_d - OS specific memory free for shared code
87 * @hw: pointer to the HW structure
88 * @mem: ptr to mem struct to free
89 **/
90 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
91 {
92 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
93
94 if (!mem || !mem->va)
95 return I40E_ERR_PARAM;
96 dma_free_coherent(&adapter->pdev->dev, mem->size,
97 mem->va, (dma_addr_t)mem->pa);
98 return 0;
99 }
100
101 /**
102 * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
103 * @hw: pointer to the HW structure
104 * @mem: ptr to mem struct to fill out
105 * @size: size of memory requested
106 **/
107 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
108 struct i40e_virt_mem *mem, u32 size)
109 {
110 if (!mem)
111 return I40E_ERR_PARAM;
112
113 mem->size = size;
114 mem->va = kzalloc(size, GFP_KERNEL);
115
116 if (mem->va)
117 return 0;
118 else
119 return I40E_ERR_NO_MEMORY;
120 }
121
122 /**
123 * i40evf_free_virt_mem_d - OS specific memory free for shared code
124 * @hw: pointer to the HW structure
125 * @mem: ptr to mem struct to free
126 **/
127 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
128 struct i40e_virt_mem *mem)
129 {
130 if (!mem)
131 return I40E_ERR_PARAM;
132
133 /* it's ok to kfree a NULL pointer */
134 kfree(mem->va);
135
136 return 0;
137 }
138
139 /**
140 * i40evf_debug_d - OS dependent version of debug printing
141 * @hw: pointer to the HW structure
142 * @mask: debug level mask
143 * @fmt_str: printf-type format description
144 **/
145 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
146 {
147 char buf[512];
148 va_list argptr;
149
150 if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
151 return;
152
153 va_start(argptr, fmt_str);
154 vsnprintf(buf, sizeof(buf), fmt_str, argptr);
155 va_end(argptr);
156
157 /* the debug string is already formatted with a newline */
158 pr_info("%s", buf);
159 }
160
161 /**
162 * i40evf_tx_timeout - Respond to a Tx Hang
163 * @netdev: network interface device structure
164 **/
165 static void i40evf_tx_timeout(struct net_device *netdev)
166 {
167 struct i40evf_adapter *adapter = netdev_priv(netdev);
168
169 adapter->tx_timeout_count++;
170 dev_info(&adapter->pdev->dev, "TX timeout detected.\n");
171 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) {
172 dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
173 i40evf_request_reset(adapter);
174 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
175 schedule_work(&adapter->reset_task);
176 }
177 }
178
179 /**
180 * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
181 * @adapter: board private structure
182 **/
183 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
184 {
185 struct i40e_hw *hw = &adapter->hw;
186 wr32(hw, I40E_VFINT_DYN_CTL01, 0);
187
188 /* read flush */
189 rd32(hw, I40E_VFGEN_RSTAT);
190
191 synchronize_irq(adapter->msix_entries[0].vector);
192 }
193
194 /**
195 * i40evf_misc_irq_enable - Enable default interrupt generation settings
196 * @adapter: board private structure
197 **/
198 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
199 {
200 struct i40e_hw *hw = &adapter->hw;
201 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
202 I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
203 wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA_ADMINQ_MASK);
204
205 /* read flush */
206 rd32(hw, I40E_VFGEN_RSTAT);
207 }
208
209 /**
210 * i40evf_irq_disable - Mask off interrupt generation on the NIC
211 * @adapter: board private structure
212 **/
213 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
214 {
215 int i;
216 struct i40e_hw *hw = &adapter->hw;
217
218 if (!adapter->msix_entries)
219 return;
220
221 for (i = 1; i < adapter->num_msix_vectors; i++) {
222 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
223 synchronize_irq(adapter->msix_entries[i].vector);
224 }
225 /* read flush */
226 rd32(hw, I40E_VFGEN_RSTAT);
227
228 }
229
230 /**
231 * i40evf_irq_enable_queues - Enable interrupt for specified queues
232 * @adapter: board private structure
233 * @mask: bitmap of queues to enable
234 **/
235 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
236 {
237 struct i40e_hw *hw = &adapter->hw;
238 int i;
239
240 for (i = 1; i < adapter->num_msix_vectors; i++) {
241 if (mask & (1 << (i - 1))) {
242 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
243 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
244 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
245 }
246 }
247 }
248
249 /**
250 * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
251 * @adapter: board private structure
252 * @mask: bitmap of vectors to trigger
253 **/
254 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter,
255 u32 mask)
256 {
257 struct i40e_hw *hw = &adapter->hw;
258 int i;
259 uint32_t dyn_ctl;
260
261 for (i = 1; i < adapter->num_msix_vectors; i++) {
262 if (mask & (1 << i)) {
263 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
264 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
265 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
266 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
267 }
268 }
269 }
270
271 /**
272 * i40evf_irq_enable - Enable default interrupt generation settings
273 * @adapter: board private structure
274 **/
275 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
276 {
277 struct i40e_hw *hw = &adapter->hw;
278
279 i40evf_irq_enable_queues(adapter, ~0);
280
281 if (flush)
282 rd32(hw, I40E_VFGEN_RSTAT);
283 }
284
285 /**
286 * i40evf_msix_aq - Interrupt handler for vector 0
287 * @irq: interrupt number
288 * @data: pointer to netdev
289 **/
290 static irqreturn_t i40evf_msix_aq(int irq, void *data)
291 {
292 struct net_device *netdev = data;
293 struct i40evf_adapter *adapter = netdev_priv(netdev);
294 struct i40e_hw *hw = &adapter->hw;
295 u32 val;
296 u32 ena_mask;
297
298 /* handle non-queue interrupts */
299 val = rd32(hw, I40E_VFINT_ICR01);
300 ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
301
302
303 val = rd32(hw, I40E_VFINT_DYN_CTL01);
304 val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
305 wr32(hw, I40E_VFINT_DYN_CTL01, val);
306
307 /* re-enable interrupt causes */
308 wr32(hw, I40E_VFINT_ICR0_ENA1, ena_mask);
309 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK);
310
311 /* schedule work on the private workqueue */
312 schedule_work(&adapter->adminq_task);
313
314 return IRQ_HANDLED;
315 }
316
317 /**
318 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
319 * @irq: interrupt number
320 * @data: pointer to a q_vector
321 **/
322 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
323 {
324 struct i40e_q_vector *q_vector = data;
325
326 if (!q_vector->tx.ring && !q_vector->rx.ring)
327 return IRQ_HANDLED;
328
329 napi_schedule(&q_vector->napi);
330
331 return IRQ_HANDLED;
332 }
333
334 /**
335 * i40evf_map_vector_to_rxq - associate irqs with rx queues
336 * @adapter: board private structure
337 * @v_idx: interrupt number
338 * @r_idx: queue number
339 **/
340 static void
341 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
342 {
343 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
344 struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
345
346 rx_ring->q_vector = q_vector;
347 rx_ring->next = q_vector->rx.ring;
348 rx_ring->vsi = &adapter->vsi;
349 q_vector->rx.ring = rx_ring;
350 q_vector->rx.count++;
351 q_vector->rx.latency_range = I40E_LOW_LATENCY;
352 }
353
354 /**
355 * i40evf_map_vector_to_txq - associate irqs with tx queues
356 * @adapter: board private structure
357 * @v_idx: interrupt number
358 * @t_idx: queue number
359 **/
360 static void
361 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
362 {
363 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
364 struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
365
366 tx_ring->q_vector = q_vector;
367 tx_ring->next = q_vector->tx.ring;
368 tx_ring->vsi = &adapter->vsi;
369 q_vector->tx.ring = tx_ring;
370 q_vector->tx.count++;
371 q_vector->tx.latency_range = I40E_LOW_LATENCY;
372 q_vector->num_ringpairs++;
373 q_vector->ring_mask |= (1 << t_idx);
374 }
375
376 /**
377 * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
378 * @adapter: board private structure to initialize
379 *
380 * This function maps descriptor rings to the queue-specific vectors
381 * we were allotted through the MSI-X enabling code. Ideally, we'd have
382 * one vector per ring/queue, but on a constrained vector budget, we
383 * group the rings as "efficiently" as possible. You would add new
384 * mapping configurations in here.
385 **/
386 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
387 {
388 int q_vectors;
389 int v_start = 0;
390 int rxr_idx = 0, txr_idx = 0;
391 int rxr_remaining = adapter->vsi_res->num_queue_pairs;
392 int txr_remaining = adapter->vsi_res->num_queue_pairs;
393 int i, j;
394 int rqpv, tqpv;
395 int err = 0;
396
397 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
398
399 /* The ideal configuration...
400 * We have enough vectors to map one per queue.
401 */
402 if (q_vectors == (rxr_remaining * 2)) {
403 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
404 i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
405
406 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
407 i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
408 goto out;
409 }
410
411 /* If we don't have enough vectors for a 1-to-1
412 * mapping, we'll have to group them so there are
413 * multiple queues per vector.
414 * Re-adjusting *qpv takes care of the remainder.
415 */
416 for (i = v_start; i < q_vectors; i++) {
417 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
418 for (j = 0; j < rqpv; j++) {
419 i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
420 rxr_idx++;
421 rxr_remaining--;
422 }
423 }
424 for (i = v_start; i < q_vectors; i++) {
425 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
426 for (j = 0; j < tqpv; j++) {
427 i40evf_map_vector_to_txq(adapter, i, txr_idx);
428 txr_idx++;
429 txr_remaining--;
430 }
431 }
432
433 out:
434 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
435
436 return err;
437 }
438
439 /**
440 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
441 * @adapter: board private structure
442 *
443 * Allocates MSI-X vectors for tx and rx handling, and requests
444 * interrupts from the kernel.
445 **/
446 static int
447 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
448 {
449 int vector, err, q_vectors;
450 int rx_int_idx = 0, tx_int_idx = 0;
451
452 i40evf_irq_disable(adapter);
453 /* Decrement for Other and TCP Timer vectors */
454 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
455
456 for (vector = 0; vector < q_vectors; vector++) {
457 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
458
459 if (q_vector->tx.ring && q_vector->rx.ring) {
460 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
461 "i40evf-%s-%s-%d", basename,
462 "TxRx", rx_int_idx++);
463 tx_int_idx++;
464 } else if (q_vector->rx.ring) {
465 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
466 "i40evf-%s-%s-%d", basename,
467 "rx", rx_int_idx++);
468 } else if (q_vector->tx.ring) {
469 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
470 "i40evf-%s-%s-%d", basename,
471 "tx", tx_int_idx++);
472 } else {
473 /* skip this unused q_vector */
474 continue;
475 }
476 err = request_irq(
477 adapter->msix_entries[vector + NONQ_VECS].vector,
478 i40evf_msix_clean_rings,
479 0,
480 q_vector->name,
481 q_vector);
482 if (err) {
483 dev_info(&adapter->pdev->dev,
484 "%s: request_irq failed, error: %d\n",
485 __func__, err);
486 goto free_queue_irqs;
487 }
488 /* assign the mask for this irq */
489 irq_set_affinity_hint(
490 adapter->msix_entries[vector + NONQ_VECS].vector,
491 q_vector->affinity_mask);
492 }
493
494 return 0;
495
496 free_queue_irqs:
497 while (vector) {
498 vector--;
499 irq_set_affinity_hint(
500 adapter->msix_entries[vector + NONQ_VECS].vector,
501 NULL);
502 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
503 adapter->q_vector[vector]);
504 }
505 return err;
506 }
507
508 /**
509 * i40evf_request_misc_irq - Initialize MSI-X interrupts
510 * @adapter: board private structure
511 *
512 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
513 * vector is only for the admin queue, and stays active even when the netdev
514 * is closed.
515 **/
516 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
517 {
518 struct net_device *netdev = adapter->netdev;
519 int err;
520
521 sprintf(adapter->misc_vector_name, "i40evf:mbx");
522 err = request_irq(adapter->msix_entries[0].vector,
523 &i40evf_msix_aq, 0,
524 adapter->misc_vector_name, netdev);
525 if (err) {
526 dev_err(&adapter->pdev->dev,
527 "request_irq for msix_aq failed: %d\n", err);
528 free_irq(adapter->msix_entries[0].vector, netdev);
529 }
530 return err;
531 }
532
533 /**
534 * i40evf_free_traffic_irqs - Free MSI-X interrupts
535 * @adapter: board private structure
536 *
537 * Frees all MSI-X vectors other than 0.
538 **/
539 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
540 {
541 int i;
542 int q_vectors;
543 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
544
545 for (i = 0; i < q_vectors; i++) {
546 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
547 NULL);
548 free_irq(adapter->msix_entries[i+1].vector,
549 adapter->q_vector[i]);
550 }
551 }
552
553 /**
554 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
555 * @adapter: board private structure
556 *
557 * Frees MSI-X vector 0.
558 **/
559 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
560 {
561 struct net_device *netdev = adapter->netdev;
562
563 free_irq(adapter->msix_entries[0].vector, netdev);
564 }
565
566 /**
567 * i40evf_configure_tx - Configure Transmit Unit after Reset
568 * @adapter: board private structure
569 *
570 * Configure the Tx unit of the MAC after a reset.
571 **/
572 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
573 {
574 struct i40e_hw *hw = &adapter->hw;
575 int i;
576 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
577 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
578 }
579
580 /**
581 * i40evf_configure_rx - Configure Receive Unit after Reset
582 * @adapter: board private structure
583 *
584 * Configure the Rx unit of the MAC after a reset.
585 **/
586 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
587 {
588 struct i40e_hw *hw = &adapter->hw;
589 struct net_device *netdev = adapter->netdev;
590 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
591 int i;
592 int rx_buf_len;
593
594
595 adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
596 adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
597
598 /* Decide whether to use packet split mode or not */
599 if (netdev->mtu > ETH_DATA_LEN) {
600 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
601 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
602 else
603 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
604 } else {
605 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
606 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
607 else
608 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
609 }
610
611 /* Set the RX buffer length according to the mode */
612 if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
613 rx_buf_len = I40E_RX_HDR_SIZE;
614 } else {
615 if (netdev->mtu <= ETH_DATA_LEN)
616 rx_buf_len = I40EVF_RXBUFFER_2048;
617 else
618 rx_buf_len = ALIGN(max_frame, 1024);
619 }
620
621 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
622 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
623 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
624 }
625 }
626
627 /**
628 * i40evf_find_vlan - Search filter list for specific vlan filter
629 * @adapter: board private structure
630 * @vlan: vlan tag
631 *
632 * Returns ptr to the filter object or NULL
633 **/
634 static struct
635 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
636 {
637 struct i40evf_vlan_filter *f;
638
639 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
640 if (vlan == f->vlan)
641 return f;
642 }
643 return NULL;
644 }
645
646 /**
647 * i40evf_add_vlan - Add a vlan filter to the list
648 * @adapter: board private structure
649 * @vlan: VLAN tag
650 *
651 * Returns ptr to the filter object or NULL when no memory available.
652 **/
653 static struct
654 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
655 {
656 struct i40evf_vlan_filter *f;
657
658 f = i40evf_find_vlan(adapter, vlan);
659 if (NULL == f) {
660 f = kzalloc(sizeof(*f), GFP_ATOMIC);
661 if (NULL == f) {
662 dev_info(&adapter->pdev->dev,
663 "%s: no memory for new VLAN filter\n",
664 __func__);
665 return NULL;
666 }
667 f->vlan = vlan;
668
669 INIT_LIST_HEAD(&f->list);
670 list_add(&f->list, &adapter->vlan_filter_list);
671 f->add = true;
672 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
673 }
674
675 return f;
676 }
677
678 /**
679 * i40evf_del_vlan - Remove a vlan filter from the list
680 * @adapter: board private structure
681 * @vlan: VLAN tag
682 **/
683 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
684 {
685 struct i40evf_vlan_filter *f;
686
687 f = i40evf_find_vlan(adapter, vlan);
688 if (f) {
689 f->remove = true;
690 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
691 }
692 return;
693 }
694
695 /**
696 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
697 * @netdev: network device struct
698 * @vid: VLAN tag
699 **/
700 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
701 __always_unused __be16 proto, u16 vid)
702 {
703 struct i40evf_adapter *adapter = netdev_priv(netdev);
704
705 if (i40evf_add_vlan(adapter, vid) == NULL)
706 return -ENOMEM;
707 return 0;
708 }
709
710 /**
711 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
712 * @netdev: network device struct
713 * @vid: VLAN tag
714 **/
715 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
716 __always_unused __be16 proto, u16 vid)
717 {
718 struct i40evf_adapter *adapter = netdev_priv(netdev);
719
720 i40evf_del_vlan(adapter, vid);
721 return 0;
722 }
723
724 /**
725 * i40evf_find_filter - Search filter list for specific mac filter
726 * @adapter: board private structure
727 * @macaddr: the MAC address
728 *
729 * Returns ptr to the filter object or NULL
730 **/
731 static struct
732 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
733 u8 *macaddr)
734 {
735 struct i40evf_mac_filter *f;
736
737 if (!macaddr)
738 return NULL;
739
740 list_for_each_entry(f, &adapter->mac_filter_list, list) {
741 if (ether_addr_equal(macaddr, f->macaddr))
742 return f;
743 }
744 return NULL;
745 }
746
747 /**
748 * i40e_add_filter - Add a mac filter to the filter list
749 * @adapter: board private structure
750 * @macaddr: the MAC address
751 *
752 * Returns ptr to the filter object or NULL when no memory available.
753 **/
754 static struct
755 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
756 u8 *macaddr)
757 {
758 struct i40evf_mac_filter *f;
759
760 if (!macaddr)
761 return NULL;
762
763 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
764 &adapter->crit_section))
765 mdelay(1);
766
767 f = i40evf_find_filter(adapter, macaddr);
768 if (NULL == f) {
769 f = kzalloc(sizeof(*f), GFP_ATOMIC);
770 if (NULL == f) {
771 dev_info(&adapter->pdev->dev,
772 "%s: no memory for new filter\n", __func__);
773 clear_bit(__I40EVF_IN_CRITICAL_TASK,
774 &adapter->crit_section);
775 return NULL;
776 }
777
778 memcpy(f->macaddr, macaddr, ETH_ALEN);
779
780 list_add(&f->list, &adapter->mac_filter_list);
781 f->add = true;
782 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
783 }
784
785 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
786 return f;
787 }
788
789 /**
790 * i40evf_set_mac - NDO callback to set port mac address
791 * @netdev: network interface device structure
792 * @p: pointer to an address structure
793 *
794 * Returns 0 on success, negative on failure
795 **/
796 static int i40evf_set_mac(struct net_device *netdev, void *p)
797 {
798 struct i40evf_adapter *adapter = netdev_priv(netdev);
799 struct i40e_hw *hw = &adapter->hw;
800 struct i40evf_mac_filter *f;
801 struct sockaddr *addr = p;
802
803 if (!is_valid_ether_addr(addr->sa_data))
804 return -EADDRNOTAVAIL;
805
806 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
807 return 0;
808
809 f = i40evf_add_filter(adapter, addr->sa_data);
810 if (f) {
811 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
812 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
813 netdev->addr_len);
814 }
815
816 return (f == NULL) ? -ENOMEM : 0;
817 }
818
819 /**
820 * i40evf_set_rx_mode - NDO callback to set the netdev filters
821 * @netdev: network interface device structure
822 **/
823 static void i40evf_set_rx_mode(struct net_device *netdev)
824 {
825 struct i40evf_adapter *adapter = netdev_priv(netdev);
826 struct i40evf_mac_filter *f, *ftmp;
827 struct netdev_hw_addr *uca;
828 struct netdev_hw_addr *mca;
829
830 /* add addr if not already in the filter list */
831 netdev_for_each_uc_addr(uca, netdev) {
832 i40evf_add_filter(adapter, uca->addr);
833 }
834 netdev_for_each_mc_addr(mca, netdev) {
835 i40evf_add_filter(adapter, mca->addr);
836 }
837
838 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
839 &adapter->crit_section))
840 mdelay(1);
841 /* remove filter if not in netdev list */
842 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
843 bool found = false;
844
845 if (f->macaddr[0] & 0x01) {
846 netdev_for_each_mc_addr(mca, netdev) {
847 if (ether_addr_equal(mca->addr, f->macaddr)) {
848 found = true;
849 break;
850 }
851 }
852 } else {
853 netdev_for_each_uc_addr(uca, netdev) {
854 if (ether_addr_equal(uca->addr, f->macaddr)) {
855 found = true;
856 break;
857 }
858 }
859 }
860 if (found) {
861 f->remove = true;
862 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
863 }
864 }
865 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
866 }
867
868 /**
869 * i40evf_napi_enable_all - enable NAPI on all queue vectors
870 * @adapter: board private structure
871 **/
872 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
873 {
874 int q_idx;
875 struct i40e_q_vector *q_vector;
876 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
877
878 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
879 struct napi_struct *napi;
880 q_vector = adapter->q_vector[q_idx];
881 napi = &q_vector->napi;
882 napi_enable(napi);
883 }
884 }
885
886 /**
887 * i40evf_napi_disable_all - disable NAPI on all queue vectors
888 * @adapter: board private structure
889 **/
890 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
891 {
892 int q_idx;
893 struct i40e_q_vector *q_vector;
894 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
895
896 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
897 q_vector = adapter->q_vector[q_idx];
898 napi_disable(&q_vector->napi);
899 }
900 }
901
902 /**
903 * i40evf_configure - set up transmit and receive data structures
904 * @adapter: board private structure
905 **/
906 static void i40evf_configure(struct i40evf_adapter *adapter)
907 {
908 struct net_device *netdev = adapter->netdev;
909 int i;
910
911 i40evf_set_rx_mode(netdev);
912
913 i40evf_configure_tx(adapter);
914 i40evf_configure_rx(adapter);
915 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
916
917 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
918 struct i40e_ring *ring = adapter->rx_rings[i];
919 i40evf_alloc_rx_buffers(ring, ring->count);
920 ring->next_to_use = ring->count - 1;
921 writel(ring->next_to_use, ring->tail);
922 }
923 }
924
925 /**
926 * i40evf_up_complete - Finish the last steps of bringing up a connection
927 * @adapter: board private structure
928 **/
929 static int i40evf_up_complete(struct i40evf_adapter *adapter)
930 {
931 adapter->state = __I40EVF_RUNNING;
932 clear_bit(__I40E_DOWN, &adapter->vsi.state);
933
934 i40evf_napi_enable_all(adapter);
935
936 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
937 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
938 return 0;
939 }
940
941 /**
942 * i40evf_clean_all_rx_rings - Free Rx Buffers for all queues
943 * @adapter: board private structure
944 **/
945 static void i40evf_clean_all_rx_rings(struct i40evf_adapter *adapter)
946 {
947 int i;
948
949 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
950 i40evf_clean_rx_ring(adapter->rx_rings[i]);
951 }
952
953 /**
954 * i40evf_clean_all_tx_rings - Free Tx Buffers for all queues
955 * @adapter: board private structure
956 **/
957 static void i40evf_clean_all_tx_rings(struct i40evf_adapter *adapter)
958 {
959 int i;
960
961 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
962 i40evf_clean_tx_ring(adapter->tx_rings[i]);
963 }
964
965 /**
966 * i40e_down - Shutdown the connection processing
967 * @adapter: board private structure
968 **/
969 void i40evf_down(struct i40evf_adapter *adapter)
970 {
971 struct net_device *netdev = adapter->netdev;
972 struct i40evf_mac_filter *f;
973
974 /* remove all MAC filters */
975 list_for_each_entry(f, &adapter->mac_filter_list, list) {
976 f->remove = true;
977 }
978 /* remove all VLAN filters */
979 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
980 f->remove = true;
981 }
982 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
983 adapter->state != __I40EVF_RESETTING) {
984 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
985 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
986 /* disable receives */
987 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
988 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
989 msleep(20);
990 }
991 netif_tx_disable(netdev);
992
993 netif_tx_stop_all_queues(netdev);
994
995 i40evf_irq_disable(adapter);
996
997 i40evf_napi_disable_all(adapter);
998
999 netif_carrier_off(netdev);
1000
1001 i40evf_clean_all_tx_rings(adapter);
1002 i40evf_clean_all_rx_rings(adapter);
1003 }
1004
1005 /**
1006 * i40evf_acquire_msix_vectors - Setup the MSIX capability
1007 * @adapter: board private structure
1008 * @vectors: number of vectors to request
1009 *
1010 * Work with the OS to set up the MSIX vectors needed.
1011 *
1012 * Returns 0 on success, negative on failure
1013 **/
1014 static int
1015 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1016 {
1017 int err, vector_threshold;
1018
1019 /* We'll want at least 3 (vector_threshold):
1020 * 0) Other (Admin Queue and link, mostly)
1021 * 1) TxQ[0] Cleanup
1022 * 2) RxQ[0] Cleanup
1023 */
1024 vector_threshold = MIN_MSIX_COUNT;
1025
1026 /* The more we get, the more we will assign to Tx/Rx Cleanup
1027 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1028 * Right now, we simply care about how many we'll get; we'll
1029 * set them up later while requesting irq's.
1030 */
1031 while (vectors >= vector_threshold) {
1032 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
1033 vectors);
1034 if (!err) /* Success in acquiring all requested vectors. */
1035 break;
1036 else if (err < 0)
1037 vectors = 0; /* Nasty failure, quit now */
1038 else /* err == number of vectors we should try again with */
1039 vectors = err;
1040 }
1041
1042 if (vectors < vector_threshold) {
1043 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts.\n");
1044 kfree(adapter->msix_entries);
1045 adapter->msix_entries = NULL;
1046 err = -EIO;
1047 } else {
1048 /* Adjust for only the vectors we'll use, which is minimum
1049 * of max_msix_q_vectors + NONQ_VECS, or the number of
1050 * vectors we were allocated.
1051 */
1052 adapter->num_msix_vectors = vectors;
1053 }
1054 return err;
1055 }
1056
1057 /**
1058 * i40evf_free_queues - Free memory for all rings
1059 * @adapter: board private structure to initialize
1060 *
1061 * Free all of the memory associated with queue pairs.
1062 **/
1063 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1064 {
1065 int i;
1066
1067 if (!adapter->vsi_res)
1068 return;
1069 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1070 if (adapter->tx_rings[i])
1071 kfree_rcu(adapter->tx_rings[i], rcu);
1072 adapter->tx_rings[i] = NULL;
1073 adapter->rx_rings[i] = NULL;
1074 }
1075 }
1076
1077 /**
1078 * i40evf_alloc_queues - Allocate memory for all rings
1079 * @adapter: board private structure to initialize
1080 *
1081 * We allocate one ring per queue at run-time since we don't know the
1082 * number of queues at compile-time. The polling_netdev array is
1083 * intended for Multiqueue, but should work fine with a single queue.
1084 **/
1085 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1086 {
1087 int i;
1088
1089 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1090 struct i40e_ring *tx_ring;
1091 struct i40e_ring *rx_ring;
1092
1093 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
1094 if (!tx_ring)
1095 goto err_out;
1096
1097 tx_ring->queue_index = i;
1098 tx_ring->netdev = adapter->netdev;
1099 tx_ring->dev = &adapter->pdev->dev;
1100 tx_ring->count = I40EVF_DEFAULT_TXD;
1101 adapter->tx_rings[i] = tx_ring;
1102
1103 rx_ring = &tx_ring[1];
1104 rx_ring->queue_index = i;
1105 rx_ring->netdev = adapter->netdev;
1106 rx_ring->dev = &adapter->pdev->dev;
1107 rx_ring->count = I40EVF_DEFAULT_RXD;
1108 adapter->rx_rings[i] = rx_ring;
1109 }
1110
1111 return 0;
1112
1113 err_out:
1114 i40evf_free_queues(adapter);
1115 return -ENOMEM;
1116 }
1117
1118 /**
1119 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1120 * @adapter: board private structure to initialize
1121 *
1122 * Attempt to configure the interrupts using the best available
1123 * capabilities of the hardware and the kernel.
1124 **/
1125 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1126 {
1127 int vector, v_budget;
1128 int pairs = 0;
1129 int err = 0;
1130
1131 if (!adapter->vsi_res) {
1132 err = -EIO;
1133 goto out;
1134 }
1135 pairs = adapter->vsi_res->num_queue_pairs;
1136
1137 /* It's easy to be greedy for MSI-X vectors, but it really
1138 * doesn't do us much good if we have a lot more vectors
1139 * than CPU's. So let's be conservative and only ask for
1140 * (roughly) twice the number of vectors as there are CPU's.
1141 */
1142 v_budget = min(pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1143 v_budget = min(v_budget, (int)adapter->vf_res->max_vectors + 1);
1144
1145 /* A failure in MSI-X entry allocation isn't fatal, but it does
1146 * mean we disable MSI-X capabilities of the adapter.
1147 */
1148 adapter->msix_entries = kcalloc(v_budget,
1149 sizeof(struct msix_entry), GFP_KERNEL);
1150 if (!adapter->msix_entries) {
1151 err = -ENOMEM;
1152 goto out;
1153 }
1154
1155 for (vector = 0; vector < v_budget; vector++)
1156 adapter->msix_entries[vector].entry = vector;
1157
1158 i40evf_acquire_msix_vectors(adapter, v_budget);
1159
1160 out:
1161 adapter->netdev->real_num_tx_queues = pairs;
1162 return err;
1163 }
1164
1165 /**
1166 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1167 * @adapter: board private structure to initialize
1168 *
1169 * We allocate one q_vector per queue interrupt. If allocation fails we
1170 * return -ENOMEM.
1171 **/
1172 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1173 {
1174 int q_idx, num_q_vectors;
1175 struct i40e_q_vector *q_vector;
1176
1177 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1178
1179 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1180 q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
1181 if (!q_vector)
1182 goto err_out;
1183 q_vector->adapter = adapter;
1184 q_vector->vsi = &adapter->vsi;
1185 q_vector->v_idx = q_idx;
1186 netif_napi_add(adapter->netdev, &q_vector->napi,
1187 i40evf_napi_poll, 64);
1188 adapter->q_vector[q_idx] = q_vector;
1189 }
1190
1191 return 0;
1192
1193 err_out:
1194 while (q_idx) {
1195 q_idx--;
1196 q_vector = adapter->q_vector[q_idx];
1197 netif_napi_del(&q_vector->napi);
1198 kfree(q_vector);
1199 adapter->q_vector[q_idx] = NULL;
1200 }
1201 return -ENOMEM;
1202 }
1203
1204 /**
1205 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1206 * @adapter: board private structure to initialize
1207 *
1208 * This function frees the memory allocated to the q_vectors. In addition if
1209 * NAPI is enabled it will delete any references to the NAPI struct prior
1210 * to freeing the q_vector.
1211 **/
1212 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1213 {
1214 int q_idx, num_q_vectors;
1215 int napi_vectors;
1216
1217 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1218 napi_vectors = adapter->vsi_res->num_queue_pairs;
1219
1220 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1221 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1222
1223 adapter->q_vector[q_idx] = NULL;
1224 if (q_idx < napi_vectors)
1225 netif_napi_del(&q_vector->napi);
1226 kfree(q_vector);
1227 }
1228 }
1229
1230 /**
1231 * i40evf_reset_interrupt_capability - Reset MSIX setup
1232 * @adapter: board private structure
1233 *
1234 **/
1235 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1236 {
1237 pci_disable_msix(adapter->pdev);
1238 kfree(adapter->msix_entries);
1239 adapter->msix_entries = NULL;
1240
1241 return;
1242 }
1243
1244 /**
1245 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1246 * @adapter: board private structure to initialize
1247 *
1248 **/
1249 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1250 {
1251 int err;
1252
1253 err = i40evf_set_interrupt_capability(adapter);
1254 if (err) {
1255 dev_err(&adapter->pdev->dev,
1256 "Unable to setup interrupt capabilities\n");
1257 goto err_set_interrupt;
1258 }
1259
1260 err = i40evf_alloc_q_vectors(adapter);
1261 if (err) {
1262 dev_err(&adapter->pdev->dev,
1263 "Unable to allocate memory for queue vectors\n");
1264 goto err_alloc_q_vectors;
1265 }
1266
1267 err = i40evf_alloc_queues(adapter);
1268 if (err) {
1269 dev_err(&adapter->pdev->dev,
1270 "Unable to allocate memory for queues\n");
1271 goto err_alloc_queues;
1272 }
1273
1274 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1275 (adapter->vsi_res->num_queue_pairs > 1) ? "Enabled" :
1276 "Disabled", adapter->vsi_res->num_queue_pairs);
1277
1278 return 0;
1279 err_alloc_queues:
1280 i40evf_free_q_vectors(adapter);
1281 err_alloc_q_vectors:
1282 i40evf_reset_interrupt_capability(adapter);
1283 err_set_interrupt:
1284 return err;
1285 }
1286
1287 /**
1288 * i40evf_watchdog_timer - Periodic call-back timer
1289 * @data: pointer to adapter disguised as unsigned long
1290 **/
1291 static void i40evf_watchdog_timer(unsigned long data)
1292 {
1293 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1294 schedule_work(&adapter->watchdog_task);
1295 /* timer will be rescheduled in watchdog task */
1296 }
1297
1298 /**
1299 * i40evf_watchdog_task - Periodic call-back task
1300 * @work: pointer to work_struct
1301 **/
1302 static void i40evf_watchdog_task(struct work_struct *work)
1303 {
1304 struct i40evf_adapter *adapter = container_of(work,
1305 struct i40evf_adapter,
1306 watchdog_task);
1307 struct i40e_hw *hw = &adapter->hw;
1308
1309 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1310 goto restart_watchdog;
1311
1312 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1313 dev_info(&adapter->pdev->dev, "Checking for redemption\n");
1314 if ((rd32(hw, I40E_VFGEN_RSTAT) & 0x3) == I40E_VFR_VFACTIVE) {
1315 /* A chance for redemption! */
1316 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1317 adapter->state = __I40EVF_STARTUP;
1318 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1319 schedule_delayed_work(&adapter->init_task, 10);
1320 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1321 &adapter->crit_section);
1322 /* Don't reschedule the watchdog, since we've restarted
1323 * the init task. When init_task contacts the PF and
1324 * gets everything set up again, it'll restart the
1325 * watchdog for us. Down, boy. Sit. Stay. Woof.
1326 */
1327 return;
1328 }
1329 adapter->aq_pending = 0;
1330 adapter->aq_required = 0;
1331 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1332 goto watchdog_done;
1333 }
1334
1335 if ((adapter->state < __I40EVF_DOWN) ||
1336 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1337 goto watchdog_done;
1338
1339 /* check for reset */
1340 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
1341 (rd32(hw, I40E_VFGEN_RSTAT) & 0x3) != I40E_VFR_VFACTIVE) {
1342 adapter->state = __I40EVF_RESETTING;
1343 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1344 dev_err(&adapter->pdev->dev, "Hardware reset detected.\n");
1345 dev_info(&adapter->pdev->dev, "Scheduling reset task\n");
1346 schedule_work(&adapter->reset_task);
1347 adapter->aq_pending = 0;
1348 adapter->aq_required = 0;
1349 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1350 goto watchdog_done;
1351 }
1352
1353 /* Process admin queue tasks. After init, everything gets done
1354 * here so we don't race on the admin queue.
1355 */
1356 if (adapter->aq_pending)
1357 goto watchdog_done;
1358
1359 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1360 i40evf_map_queues(adapter);
1361 goto watchdog_done;
1362 }
1363
1364 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1365 i40evf_add_ether_addrs(adapter);
1366 goto watchdog_done;
1367 }
1368
1369 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1370 i40evf_add_vlans(adapter);
1371 goto watchdog_done;
1372 }
1373
1374 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1375 i40evf_del_ether_addrs(adapter);
1376 goto watchdog_done;
1377 }
1378
1379 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1380 i40evf_del_vlans(adapter);
1381 goto watchdog_done;
1382 }
1383
1384 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1385 i40evf_disable_queues(adapter);
1386 goto watchdog_done;
1387 }
1388
1389 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1390 i40evf_configure_queues(adapter);
1391 goto watchdog_done;
1392 }
1393
1394 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1395 i40evf_enable_queues(adapter);
1396 goto watchdog_done;
1397 }
1398
1399 if (adapter->state == __I40EVF_RUNNING)
1400 i40evf_request_stats(adapter);
1401
1402 i40evf_irq_enable(adapter, true);
1403 i40evf_fire_sw_int(adapter, 0xFF);
1404
1405 watchdog_done:
1406 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1407 restart_watchdog:
1408 if (adapter->aq_required)
1409 mod_timer(&adapter->watchdog_timer,
1410 jiffies + msecs_to_jiffies(20));
1411 else
1412 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1413 schedule_work(&adapter->adminq_task);
1414 }
1415
1416 /**
1417 * i40evf_configure_rss - Prepare for RSS if used
1418 * @adapter: board private structure
1419 **/
1420 static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1421 {
1422 struct i40e_hw *hw = &adapter->hw;
1423 u32 lut = 0;
1424 int i, j;
1425 u64 hena;
1426
1427 /* Set of random keys generated using kernel random number generator */
1428 static const u32 seed[I40E_VFQF_HKEY_MAX_INDEX + 1] = {
1429 0x794221b4, 0xbca0c5ab, 0x6cd5ebd9, 0x1ada6127,
1430 0x983b3aa1, 0x1c4e71eb, 0x7f6328b2, 0xfcdc0da0,
1431 0xc135cafa, 0x7a6f7e2d, 0xe7102d28, 0x163cd12e,
1432 0x4954b126 };
1433
1434 /* Hash type is configured by the PF - we just supply the key */
1435
1436 /* Fill out hash function seed */
1437 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1438 wr32(hw, I40E_VFQF_HKEY(i), seed[i]);
1439
1440 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1441 hena = I40E_DEFAULT_RSS_HENA;
1442 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1443 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1444
1445 /* Populate the LUT with max no. of queues in round robin fashion */
1446 for (i = 0, j = 0; i < I40E_VFQF_HLUT_MAX_INDEX; i++, j++) {
1447 if (j == adapter->vsi_res->num_queue_pairs)
1448 j = 0;
1449 /* lut = 4-byte sliding window of 4 lut entries */
1450 lut = (lut << 8) | (j &
1451 ((0x1 << 8) - 1));
1452 /* On i = 3, we have 4 entries in lut; write to the register */
1453 if ((i & 3) == 3)
1454 wr32(hw, I40E_VFQF_HLUT(i >> 2), lut);
1455 }
1456 i40e_flush(hw);
1457 }
1458
1459 #define I40EVF_RESET_WAIT_MS 100
1460 #define I40EVF_RESET_WAIT_COUNT 200
1461 /**
1462 * i40evf_reset_task - Call-back task to handle hardware reset
1463 * @work: pointer to work_struct
1464 *
1465 * During reset we need to shut down and reinitialize the admin queue
1466 * before we can use it to communicate with the PF again. We also clear
1467 * and reinit the rings because that context is lost as well.
1468 **/
1469 static void i40evf_reset_task(struct work_struct *work)
1470 {
1471 struct i40evf_adapter *adapter = container_of(work,
1472 struct i40evf_adapter,
1473 reset_task);
1474 struct i40e_hw *hw = &adapter->hw;
1475 int i = 0, err;
1476 uint32_t rstat_val;
1477
1478 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1479 &adapter->crit_section))
1480 udelay(500);
1481 /* poll until we see the reset actually happen */
1482 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1483 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1484 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1485 if (rstat_val != I40E_VFR_VFACTIVE) {
1486 dev_info(&adapter->pdev->dev, "Reset now occurring\n");
1487 break;
1488 } else {
1489 msleep(I40EVF_RESET_WAIT_MS);
1490 }
1491 }
1492 if (i == I40EVF_RESET_WAIT_COUNT) {
1493 dev_err(&adapter->pdev->dev, "Reset was not detected\n");
1494 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1495 goto continue_reset; /* act like the reset happened */
1496 }
1497
1498 /* wait until the reset is complete and the PF is responding to us */
1499 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1500 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1501 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1502 if (rstat_val == I40E_VFR_VFACTIVE) {
1503 dev_info(&adapter->pdev->dev, "Reset is complete. Reinitializing.\n");
1504 break;
1505 } else {
1506 msleep(I40EVF_RESET_WAIT_MS);
1507 }
1508 }
1509 if (i == I40EVF_RESET_WAIT_COUNT) {
1510 /* reset never finished */
1511 dev_err(&adapter->pdev->dev, "Reset never finished (%x). PF driver is dead, and so am I.\n",
1512 rstat_val);
1513 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1514
1515 if (netif_running(adapter->netdev))
1516 i40evf_close(adapter->netdev);
1517
1518 i40evf_free_misc_irq(adapter);
1519 i40evf_reset_interrupt_capability(adapter);
1520 i40evf_free_queues(adapter);
1521 kfree(adapter->vf_res);
1522 i40evf_shutdown_adminq(hw);
1523 adapter->netdev->flags &= ~IFF_UP;
1524 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1525 return; /* Do not attempt to reinit. It's dead, Jim. */
1526 }
1527
1528 continue_reset:
1529 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1530
1531 i40evf_down(adapter);
1532 adapter->state = __I40EVF_RESETTING;
1533
1534 /* kill and reinit the admin queue */
1535 if (i40evf_shutdown_adminq(hw))
1536 dev_warn(&adapter->pdev->dev,
1537 "%s: Failed to destroy the Admin Queue resources\n",
1538 __func__);
1539 err = i40evf_init_adminq(hw);
1540 if (err)
1541 dev_info(&adapter->pdev->dev, "%s: init_adminq failed: %d\n",
1542 __func__, err);
1543
1544 adapter->aq_pending = 0;
1545 adapter->aq_required = 0;
1546 i40evf_map_queues(adapter);
1547 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1548
1549 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1550
1551 if (netif_running(adapter->netdev)) {
1552 /* allocate transmit descriptors */
1553 err = i40evf_setup_all_tx_resources(adapter);
1554 if (err)
1555 goto reset_err;
1556
1557 /* allocate receive descriptors */
1558 err = i40evf_setup_all_rx_resources(adapter);
1559 if (err)
1560 goto reset_err;
1561
1562 i40evf_configure(adapter);
1563
1564 err = i40evf_up_complete(adapter);
1565 if (err)
1566 goto reset_err;
1567
1568 i40evf_irq_enable(adapter, true);
1569 }
1570 return;
1571 reset_err:
1572 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit.\n");
1573 i40evf_close(adapter->netdev);
1574 }
1575
1576 /**
1577 * i40evf_adminq_task - worker thread to clean the admin queue
1578 * @work: pointer to work_struct containing our data
1579 **/
1580 static void i40evf_adminq_task(struct work_struct *work)
1581 {
1582 struct i40evf_adapter *adapter =
1583 container_of(work, struct i40evf_adapter, adminq_task);
1584 struct i40e_hw *hw = &adapter->hw;
1585 struct i40e_arq_event_info event;
1586 struct i40e_virtchnl_msg *v_msg;
1587 i40e_status ret;
1588 u16 pending;
1589
1590 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1591 return;
1592
1593 event.msg_size = I40EVF_MAX_AQ_BUF_SIZE;
1594 event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
1595 if (!event.msg_buf) {
1596 dev_info(&adapter->pdev->dev, "%s: no memory for ARQ clean\n",
1597 __func__);
1598 return;
1599 }
1600 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1601 do {
1602 ret = i40evf_clean_arq_element(hw, &event, &pending);
1603 if (ret)
1604 break; /* No event to process or error cleaning ARQ */
1605
1606 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1607 v_msg->v_retval, event.msg_buf,
1608 event.msg_size);
1609 if (pending != 0) {
1610 dev_info(&adapter->pdev->dev,
1611 "%s: ARQ: Pending events %d\n",
1612 __func__, pending);
1613 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1614 }
1615 } while (pending);
1616
1617 /* re-enable Admin queue interrupt cause */
1618 i40evf_misc_irq_enable(adapter);
1619
1620 kfree(event.msg_buf);
1621 }
1622
1623 /**
1624 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1625 * @adapter: board private structure
1626 *
1627 * Free all transmit software resources
1628 **/
1629 static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1630 {
1631 int i;
1632
1633 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1634 if (adapter->tx_rings[i]->desc)
1635 i40evf_free_tx_resources(adapter->tx_rings[i]);
1636
1637 }
1638
1639 /**
1640 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1641 * @adapter: board private structure
1642 *
1643 * If this function returns with an error, then it's possible one or
1644 * more of the rings is populated (while the rest are not). It is the
1645 * callers duty to clean those orphaned rings.
1646 *
1647 * Return 0 on success, negative on failure
1648 **/
1649 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1650 {
1651 int i, err = 0;
1652
1653 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1654 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1655 if (!err)
1656 continue;
1657 dev_err(&adapter->pdev->dev,
1658 "%s: Allocation for Tx Queue %u failed\n",
1659 __func__, i);
1660 break;
1661 }
1662
1663 return err;
1664 }
1665
1666 /**
1667 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1668 * @adapter: board private structure
1669 *
1670 * If this function returns with an error, then it's possible one or
1671 * more of the rings is populated (while the rest are not). It is the
1672 * callers duty to clean those orphaned rings.
1673 *
1674 * Return 0 on success, negative on failure
1675 **/
1676 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1677 {
1678 int i, err = 0;
1679
1680 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1681 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1682 if (!err)
1683 continue;
1684 dev_err(&adapter->pdev->dev,
1685 "%s: Allocation for Rx Queue %u failed\n",
1686 __func__, i);
1687 break;
1688 }
1689 return err;
1690 }
1691
1692 /**
1693 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1694 * @adapter: board private structure
1695 *
1696 * Free all receive software resources
1697 **/
1698 static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1699 {
1700 int i;
1701
1702 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1703 if (adapter->rx_rings[i]->desc)
1704 i40evf_free_rx_resources(adapter->rx_rings[i]);
1705 }
1706
1707 /**
1708 * i40evf_open - Called when a network interface is made active
1709 * @netdev: network interface device structure
1710 *
1711 * Returns 0 on success, negative value on failure
1712 *
1713 * The open entry point is called when a network interface is made
1714 * active by the system (IFF_UP). At this point all resources needed
1715 * for transmit and receive operations are allocated, the interrupt
1716 * handler is registered with the OS, the watchdog timer is started,
1717 * and the stack is notified that the interface is ready.
1718 **/
1719 static int i40evf_open(struct net_device *netdev)
1720 {
1721 struct i40evf_adapter *adapter = netdev_priv(netdev);
1722 int err;
1723
1724 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1725 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1726 return -EIO;
1727 }
1728 if (adapter->state != __I40EVF_DOWN)
1729 return -EBUSY;
1730
1731 /* allocate transmit descriptors */
1732 err = i40evf_setup_all_tx_resources(adapter);
1733 if (err)
1734 goto err_setup_tx;
1735
1736 /* allocate receive descriptors */
1737 err = i40evf_setup_all_rx_resources(adapter);
1738 if (err)
1739 goto err_setup_rx;
1740
1741 /* clear any pending interrupts, may auto mask */
1742 err = i40evf_request_traffic_irqs(adapter, netdev->name);
1743 if (err)
1744 goto err_req_irq;
1745
1746 i40evf_configure(adapter);
1747
1748 err = i40evf_up_complete(adapter);
1749 if (err)
1750 goto err_req_irq;
1751
1752 i40evf_irq_enable(adapter, true);
1753
1754 return 0;
1755
1756 err_req_irq:
1757 i40evf_down(adapter);
1758 i40evf_free_traffic_irqs(adapter);
1759 err_setup_rx:
1760 i40evf_free_all_rx_resources(adapter);
1761 err_setup_tx:
1762 i40evf_free_all_tx_resources(adapter);
1763
1764 return err;
1765 }
1766
1767 /**
1768 * i40evf_close - Disables a network interface
1769 * @netdev: network interface device structure
1770 *
1771 * Returns 0, this is not allowed to fail
1772 *
1773 * The close entry point is called when an interface is de-activated
1774 * by the OS. The hardware is still under the drivers control, but
1775 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1776 * are freed, along with all transmit and receive resources.
1777 **/
1778 static int i40evf_close(struct net_device *netdev)
1779 {
1780 struct i40evf_adapter *adapter = netdev_priv(netdev);
1781
1782 if (adapter->state <= __I40EVF_DOWN)
1783 return 0;
1784
1785 /* signal that we are down to the interrupt handler */
1786 adapter->state = __I40EVF_DOWN;
1787
1788 set_bit(__I40E_DOWN, &adapter->vsi.state);
1789
1790 i40evf_down(adapter);
1791 i40evf_free_traffic_irqs(adapter);
1792
1793 i40evf_free_all_tx_resources(adapter);
1794 i40evf_free_all_rx_resources(adapter);
1795
1796 return 0;
1797 }
1798
1799 /**
1800 * i40evf_get_stats - Get System Network Statistics
1801 * @netdev: network interface device structure
1802 *
1803 * Returns the address of the device statistics structure.
1804 * The statistics are actually updated from the timer callback.
1805 **/
1806 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1807 {
1808 struct i40evf_adapter *adapter = netdev_priv(netdev);
1809
1810 /* only return the current stats */
1811 return &adapter->net_stats;
1812 }
1813
1814 /**
1815 * i40evf_reinit_locked - Software reinit
1816 * @adapter: board private structure
1817 *
1818 * Reinititalizes the ring structures in response to a software configuration
1819 * change. Roughly the same as close followed by open, but skips releasing
1820 * and reallocating the interrupts.
1821 **/
1822 void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1823 {
1824 struct net_device *netdev = adapter->netdev;
1825 int err;
1826
1827 WARN_ON(in_interrupt());
1828
1829 adapter->state = __I40EVF_RESETTING;
1830
1831 i40evf_down(adapter);
1832
1833 /* allocate transmit descriptors */
1834 err = i40evf_setup_all_tx_resources(adapter);
1835 if (err)
1836 goto err_reinit;
1837
1838 /* allocate receive descriptors */
1839 err = i40evf_setup_all_rx_resources(adapter);
1840 if (err)
1841 goto err_reinit;
1842
1843 i40evf_configure(adapter);
1844
1845 err = i40evf_up_complete(adapter);
1846 if (err)
1847 goto err_reinit;
1848
1849 i40evf_irq_enable(adapter, true);
1850 return;
1851
1852 err_reinit:
1853 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit.\n");
1854 i40evf_close(netdev);
1855 }
1856
1857 /**
1858 * i40evf_change_mtu - Change the Maximum Transfer Unit
1859 * @netdev: network interface device structure
1860 * @new_mtu: new value for maximum frame size
1861 *
1862 * Returns 0 on success, negative on failure
1863 **/
1864 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1865 {
1866 struct i40evf_adapter *adapter = netdev_priv(netdev);
1867 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1868
1869 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1870 return -EINVAL;
1871
1872 /* must set new MTU before calling down or up */
1873 netdev->mtu = new_mtu;
1874 i40evf_reinit_locked(adapter);
1875 return 0;
1876 }
1877
1878 static const struct net_device_ops i40evf_netdev_ops = {
1879 .ndo_open = i40evf_open,
1880 .ndo_stop = i40evf_close,
1881 .ndo_start_xmit = i40evf_xmit_frame,
1882 .ndo_get_stats = i40evf_get_stats,
1883 .ndo_set_rx_mode = i40evf_set_rx_mode,
1884 .ndo_validate_addr = eth_validate_addr,
1885 .ndo_set_mac_address = i40evf_set_mac,
1886 .ndo_change_mtu = i40evf_change_mtu,
1887 .ndo_tx_timeout = i40evf_tx_timeout,
1888 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
1889 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
1890 };
1891
1892 /**
1893 * i40evf_check_reset_complete - check that VF reset is complete
1894 * @hw: pointer to hw struct
1895 *
1896 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1897 **/
1898 static int i40evf_check_reset_complete(struct i40e_hw *hw)
1899 {
1900 u32 rstat;
1901 int i;
1902
1903 for (i = 0; i < 100; i++) {
1904 rstat = rd32(hw, I40E_VFGEN_RSTAT);
1905 if (rstat == I40E_VFR_VFACTIVE)
1906 return 0;
1907 udelay(10);
1908 }
1909 return -EBUSY;
1910 }
1911
1912 /**
1913 * i40evf_init_task - worker thread to perform delayed initialization
1914 * @work: pointer to work_struct containing our data
1915 *
1916 * This task completes the work that was begun in probe. Due to the nature
1917 * of VF-PF communications, we may need to wait tens of milliseconds to get
1918 * reponses back from the PF. Rather than busy-wait in probe and bog down the
1919 * whole system, we'll do it in a task so we can sleep.
1920 * This task only runs during driver init. Once we've established
1921 * communications with the PF driver and set up our netdev, the watchdog
1922 * takes over.
1923 **/
1924 static void i40evf_init_task(struct work_struct *work)
1925 {
1926 struct i40evf_adapter *adapter = container_of(work,
1927 struct i40evf_adapter,
1928 init_task.work);
1929 struct net_device *netdev = adapter->netdev;
1930 struct i40evf_mac_filter *f;
1931 struct i40e_hw *hw = &adapter->hw;
1932 struct pci_dev *pdev = adapter->pdev;
1933 int i, err, bufsz;
1934
1935 switch (adapter->state) {
1936 case __I40EVF_STARTUP:
1937 /* driver loaded, probe complete */
1938 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1939 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1940 err = i40e_set_mac_type(hw);
1941 if (err) {
1942 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
1943 err);
1944 goto err;
1945 }
1946 err = i40evf_check_reset_complete(hw);
1947 if (err) {
1948 dev_err(&pdev->dev, "Device is still in reset (%d)\n",
1949 err);
1950 goto err;
1951 }
1952 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
1953 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
1954 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1955 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1956
1957 err = i40evf_init_adminq(hw);
1958 if (err) {
1959 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
1960 err);
1961 goto err;
1962 }
1963 err = i40evf_send_api_ver(adapter);
1964 if (err) {
1965 dev_err(&pdev->dev, "Unable to send to PF (%d)\n",
1966 err);
1967 i40evf_shutdown_adminq(hw);
1968 goto err;
1969 }
1970 adapter->state = __I40EVF_INIT_VERSION_CHECK;
1971 goto restart;
1972 break;
1973 case __I40EVF_INIT_VERSION_CHECK:
1974 if (!i40evf_asq_done(hw))
1975 goto err;
1976
1977 /* aq msg sent, awaiting reply */
1978 err = i40evf_verify_api_ver(adapter);
1979 if (err) {
1980 dev_err(&pdev->dev, "Unable to verify API version (%d)\n",
1981 err);
1982 goto err;
1983 }
1984 err = i40evf_send_vf_config_msg(adapter);
1985 if (err) {
1986 dev_err(&pdev->dev, "Unable send config request (%d)\n",
1987 err);
1988 goto err;
1989 }
1990 adapter->state = __I40EVF_INIT_GET_RESOURCES;
1991 goto restart;
1992 break;
1993 case __I40EVF_INIT_GET_RESOURCES:
1994 /* aq msg sent, awaiting reply */
1995 if (!adapter->vf_res) {
1996 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
1997 (I40E_MAX_VF_VSI *
1998 sizeof(struct i40e_virtchnl_vsi_resource));
1999 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2000 if (!adapter->vf_res)
2001 goto err;
2002 }
2003 err = i40evf_get_vf_config(adapter);
2004 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2005 goto restart;
2006 if (err) {
2007 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2008 err);
2009 goto err_alloc;
2010 }
2011 adapter->state = __I40EVF_INIT_SW;
2012 break;
2013 default:
2014 goto err_alloc;
2015 }
2016 /* got VF config message back from PF, now we can parse it */
2017 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2018 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2019 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2020 }
2021 if (!adapter->vsi_res) {
2022 dev_err(&pdev->dev, "No LAN VSI found\n");
2023 goto err_alloc;
2024 }
2025
2026 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2027
2028 netdev->netdev_ops = &i40evf_netdev_ops;
2029 i40evf_set_ethtool_ops(netdev);
2030 netdev->watchdog_timeo = 5 * HZ;
2031 netdev->features |= NETIF_F_HIGHDMA |
2032 NETIF_F_SG |
2033 NETIF_F_IP_CSUM |
2034 NETIF_F_SCTP_CSUM |
2035 NETIF_F_IPV6_CSUM |
2036 NETIF_F_TSO |
2037 NETIF_F_TSO6 |
2038 NETIF_F_GRO;
2039
2040 if (adapter->vf_res->vf_offload_flags
2041 & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2042 netdev->vlan_features = netdev->features;
2043 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2044 NETIF_F_HW_VLAN_CTAG_RX |
2045 NETIF_F_HW_VLAN_CTAG_FILTER;
2046 }
2047
2048 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2049 dev_info(&pdev->dev, "Invalid MAC address %pMAC, using random\n",
2050 adapter->hw.mac.addr);
2051 random_ether_addr(adapter->hw.mac.addr);
2052 }
2053 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
2054 memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
2055
2056 INIT_LIST_HEAD(&adapter->mac_filter_list);
2057 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2058 f = kzalloc(sizeof(*f), GFP_ATOMIC);
2059 if (NULL == f)
2060 goto err_sw_init;
2061
2062 memcpy(f->macaddr, adapter->hw.mac.addr, ETH_ALEN);
2063 f->add = true;
2064 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2065
2066 list_add(&f->list, &adapter->mac_filter_list);
2067
2068 init_timer(&adapter->watchdog_timer);
2069 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2070 adapter->watchdog_timer.data = (unsigned long)adapter;
2071 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2072
2073 err = i40evf_init_interrupt_scheme(adapter);
2074 if (err)
2075 goto err_sw_init;
2076 i40evf_map_rings_to_vectors(adapter);
2077 i40evf_configure_rss(adapter);
2078 err = i40evf_request_misc_irq(adapter);
2079 if (err)
2080 goto err_sw_init;
2081
2082 netif_carrier_off(netdev);
2083
2084 adapter->vsi.id = adapter->vsi_res->vsi_id;
2085 adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2086 adapter->vsi.back = adapter;
2087 adapter->vsi.base_vector = 1;
2088 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2089 adapter->vsi.rx_itr_setting = I40E_ITR_DYNAMIC;
2090 adapter->vsi.tx_itr_setting = I40E_ITR_DYNAMIC;
2091 adapter->vsi.netdev = adapter->netdev;
2092
2093 if (!adapter->netdev_registered) {
2094 err = register_netdev(netdev);
2095 if (err)
2096 goto err_register;
2097 }
2098
2099 adapter->netdev_registered = true;
2100
2101 netif_tx_stop_all_queues(netdev);
2102
2103 dev_info(&pdev->dev, "MAC address: %pMAC\n", adapter->hw.mac.addr);
2104 if (netdev->features & NETIF_F_GRO)
2105 dev_info(&pdev->dev, "GRO is enabled\n");
2106
2107 dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2108 adapter->state = __I40EVF_DOWN;
2109 set_bit(__I40E_DOWN, &adapter->vsi.state);
2110 i40evf_misc_irq_enable(adapter);
2111 return;
2112 restart:
2113 schedule_delayed_work(&adapter->init_task,
2114 msecs_to_jiffies(50));
2115 return;
2116
2117 err_register:
2118 i40evf_free_misc_irq(adapter);
2119 err_sw_init:
2120 i40evf_reset_interrupt_capability(adapter);
2121 err_alloc:
2122 kfree(adapter->vf_res);
2123 adapter->vf_res = NULL;
2124 err:
2125 if (hw->aq.asq.count)
2126 i40evf_shutdown_adminq(hw); /* ignore error */
2127 /* Things went into the weeds, so try again later */
2128 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2129 dev_err(&pdev->dev, "Failed to communicate with PF; giving up.\n");
2130 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2131 return; /* do not reschedule */
2132 }
2133 schedule_delayed_work(&adapter->init_task, HZ * 3);
2134 return;
2135 }
2136
2137 /**
2138 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2139 * @pdev: pci device structure
2140 **/
2141 static void i40evf_shutdown(struct pci_dev *pdev)
2142 {
2143 struct net_device *netdev = pci_get_drvdata(pdev);
2144
2145 netif_device_detach(netdev);
2146
2147 if (netif_running(netdev))
2148 i40evf_close(netdev);
2149
2150 #ifdef CONFIG_PM
2151 pci_save_state(pdev);
2152
2153 #endif
2154 pci_disable_device(pdev);
2155 }
2156
2157 /**
2158 * i40evf_probe - Device Initialization Routine
2159 * @pdev: PCI device information struct
2160 * @ent: entry in i40evf_pci_tbl
2161 *
2162 * Returns 0 on success, negative on failure
2163 *
2164 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2165 * The OS initialization, configuring of the adapter private structure,
2166 * and a hardware reset occur.
2167 **/
2168 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2169 {
2170 struct net_device *netdev;
2171 struct i40evf_adapter *adapter = NULL;
2172 struct i40e_hw *hw = NULL;
2173 int err;
2174
2175 err = pci_enable_device(pdev);
2176 if (err)
2177 return err;
2178
2179 if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
2180 /* coherent mask for the same size will always succeed if
2181 * dma_set_mask does
2182 */
2183 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
2184 } else if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
2185 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
2186 } else {
2187 dev_err(&pdev->dev, "%s: DMA configuration failed: %d\n",
2188 __func__, err);
2189 err = -EIO;
2190 goto err_dma;
2191 }
2192
2193 err = pci_request_regions(pdev, i40evf_driver_name);
2194 if (err) {
2195 dev_err(&pdev->dev,
2196 "pci_request_regions failed 0x%x\n", err);
2197 goto err_pci_reg;
2198 }
2199
2200 pci_enable_pcie_error_reporting(pdev);
2201
2202 pci_set_master(pdev);
2203
2204 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2205 MAX_TX_QUEUES);
2206 if (!netdev) {
2207 err = -ENOMEM;
2208 goto err_alloc_etherdev;
2209 }
2210
2211 SET_NETDEV_DEV(netdev, &pdev->dev);
2212
2213 pci_set_drvdata(pdev, netdev);
2214 adapter = netdev_priv(netdev);
2215
2216 adapter->netdev = netdev;
2217 adapter->pdev = pdev;
2218
2219 hw = &adapter->hw;
2220 hw->back = adapter;
2221
2222 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2223 adapter->state = __I40EVF_STARTUP;
2224
2225 /* Call save state here because it relies on the adapter struct. */
2226 pci_save_state(pdev);
2227
2228 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2229 pci_resource_len(pdev, 0));
2230 if (!hw->hw_addr) {
2231 err = -EIO;
2232 goto err_ioremap;
2233 }
2234 hw->vendor_id = pdev->vendor;
2235 hw->device_id = pdev->device;
2236 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2237 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2238 hw->subsystem_device_id = pdev->subsystem_device;
2239 hw->bus.device = PCI_SLOT(pdev->devfn);
2240 hw->bus.func = PCI_FUNC(pdev->devfn);
2241
2242 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2243 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2244 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2245 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2246 schedule_delayed_work(&adapter->init_task, 10);
2247
2248 return 0;
2249
2250 err_ioremap:
2251 free_netdev(netdev);
2252 err_alloc_etherdev:
2253 pci_release_regions(pdev);
2254 err_pci_reg:
2255 err_dma:
2256 pci_disable_device(pdev);
2257 return err;
2258 }
2259
2260 #ifdef CONFIG_PM
2261 /**
2262 * i40evf_suspend - Power management suspend routine
2263 * @pdev: PCI device information struct
2264 * @state: unused
2265 *
2266 * Called when the system (VM) is entering sleep/suspend.
2267 **/
2268 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2269 {
2270 struct net_device *netdev = pci_get_drvdata(pdev);
2271 struct i40evf_adapter *adapter = netdev_priv(netdev);
2272 int retval = 0;
2273
2274 netif_device_detach(netdev);
2275
2276 if (netif_running(netdev)) {
2277 rtnl_lock();
2278 i40evf_down(adapter);
2279 rtnl_unlock();
2280 }
2281 i40evf_free_misc_irq(adapter);
2282 i40evf_reset_interrupt_capability(adapter);
2283
2284 retval = pci_save_state(pdev);
2285 if (retval)
2286 return retval;
2287
2288 pci_disable_device(pdev);
2289
2290 return 0;
2291 }
2292
2293 /**
2294 * i40evf_resume - Power managment resume routine
2295 * @pdev: PCI device information struct
2296 *
2297 * Called when the system (VM) is resumed from sleep/suspend.
2298 **/
2299 static int i40evf_resume(struct pci_dev *pdev)
2300 {
2301 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2302 struct net_device *netdev = adapter->netdev;
2303 u32 err;
2304
2305 pci_set_power_state(pdev, PCI_D0);
2306 pci_restore_state(pdev);
2307 /* pci_restore_state clears dev->state_saved so call
2308 * pci_save_state to restore it.
2309 */
2310 pci_save_state(pdev);
2311
2312 err = pci_enable_device_mem(pdev);
2313 if (err) {
2314 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2315 return err;
2316 }
2317 pci_set_master(pdev);
2318
2319 rtnl_lock();
2320 err = i40evf_set_interrupt_capability(adapter);
2321 if (err) {
2322 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2323 return err;
2324 }
2325 err = i40evf_request_misc_irq(adapter);
2326 rtnl_unlock();
2327 if (err) {
2328 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2329 return err;
2330 }
2331
2332 schedule_work(&adapter->reset_task);
2333
2334 netif_device_attach(netdev);
2335
2336 return err;
2337 }
2338
2339 #endif /* CONFIG_PM */
2340 /**
2341 * i40evf_remove - Device Removal Routine
2342 * @pdev: PCI device information struct
2343 *
2344 * i40evf_remove is called by the PCI subsystem to alert the driver
2345 * that it should release a PCI device. The could be caused by a
2346 * Hot-Plug event, or because the driver is going to be removed from
2347 * memory.
2348 **/
2349 static void i40evf_remove(struct pci_dev *pdev)
2350 {
2351 struct net_device *netdev = pci_get_drvdata(pdev);
2352 struct i40evf_adapter *adapter = netdev_priv(netdev);
2353 struct i40e_hw *hw = &adapter->hw;
2354
2355 cancel_delayed_work_sync(&adapter->init_task);
2356 cancel_work_sync(&adapter->reset_task);
2357
2358 if (adapter->netdev_registered) {
2359 unregister_netdev(netdev);
2360 adapter->netdev_registered = false;
2361 }
2362 adapter->state = __I40EVF_REMOVE;
2363
2364 if (adapter->msix_entries) {
2365 i40evf_misc_irq_disable(adapter);
2366 i40evf_free_misc_irq(adapter);
2367 i40evf_reset_interrupt_capability(adapter);
2368 }
2369
2370 del_timer_sync(&adapter->watchdog_timer);
2371 flush_scheduled_work();
2372
2373 if (hw->aq.asq.count)
2374 i40evf_shutdown_adminq(hw);
2375
2376 iounmap(hw->hw_addr);
2377 pci_release_regions(pdev);
2378
2379 i40evf_free_queues(adapter);
2380 kfree(adapter->vf_res);
2381
2382 free_netdev(netdev);
2383
2384 pci_disable_pcie_error_reporting(pdev);
2385
2386 pci_disable_device(pdev);
2387 }
2388
2389 static struct pci_driver i40evf_driver = {
2390 .name = i40evf_driver_name,
2391 .id_table = i40evf_pci_tbl,
2392 .probe = i40evf_probe,
2393 .remove = i40evf_remove,
2394 #ifdef CONFIG_PM
2395 .suspend = i40evf_suspend,
2396 .resume = i40evf_resume,
2397 #endif
2398 .shutdown = i40evf_shutdown,
2399 };
2400
2401 /**
2402 * i40e_init_module - Driver Registration Routine
2403 *
2404 * i40e_init_module is the first routine called when the driver is
2405 * loaded. All it does is register with the PCI subsystem.
2406 **/
2407 static int __init i40evf_init_module(void)
2408 {
2409 int ret;
2410 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2411 i40evf_driver_version);
2412
2413 pr_info("%s\n", i40evf_copyright);
2414
2415 ret = pci_register_driver(&i40evf_driver);
2416 return ret;
2417 }
2418
2419 module_init(i40evf_init_module);
2420
2421 /**
2422 * i40e_exit_module - Driver Exit Cleanup Routine
2423 *
2424 * i40e_exit_module is called just before the driver is removed
2425 * from memory.
2426 **/
2427 static void __exit i40evf_exit_module(void)
2428 {
2429 pci_unregister_driver(&i40evf_driver);
2430 }
2431
2432 module_exit(i40evf_exit_module);
2433
2434 /* i40evf_main.c */
Linux kernel - Deliverables
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