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Merge branch 'drm-fixes-3.18' of git://people.freedesktop.org/~agd5f/linux into drm...
[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 * 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 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter);
32 static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter);
33 static int i40evf_close(struct net_device *netdev);
34
35 char i40evf_driver_name[] = "i40evf";
36 static const char i40evf_driver_string[] =
37 "Intel(R) XL710/X710 Virtual Function Network Driver";
38
39 #define DRV_VERSION "1.0.5"
40 const char i40evf_driver_version[] = DRV_VERSION;
41 static const char i40evf_copyright[] =
42 "Copyright (c) 2013 - 2014 Intel Corporation.";
43
44 /* i40evf_pci_tbl - PCI Device ID Table
45 *
46 * Wildcard entries (PCI_ANY_ID) should come last
47 * Last entry must be all 0s
48 *
49 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
50 * Class, Class Mask, private data (not used) }
51 */
52 static const struct pci_device_id i40evf_pci_tbl[] = {
53 {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
54 /* required last entry */
55 {0, }
56 };
57
58 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
59
60 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
61 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
62 MODULE_LICENSE("GPL");
63 MODULE_VERSION(DRV_VERSION);
64
65 /**
66 * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
67 * @hw: pointer to the HW structure
68 * @mem: ptr to mem struct to fill out
69 * @size: size of memory requested
70 * @alignment: what to align the allocation to
71 **/
72 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
73 struct i40e_dma_mem *mem,
74 u64 size, u32 alignment)
75 {
76 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
77
78 if (!mem)
79 return I40E_ERR_PARAM;
80
81 mem->size = ALIGN(size, alignment);
82 mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
83 (dma_addr_t *)&mem->pa, GFP_KERNEL);
84 if (mem->va)
85 return 0;
86 else
87 return I40E_ERR_NO_MEMORY;
88 }
89
90 /**
91 * i40evf_free_dma_mem_d - OS specific memory free for shared code
92 * @hw: pointer to the HW structure
93 * @mem: ptr to mem struct to free
94 **/
95 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
96 {
97 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
98
99 if (!mem || !mem->va)
100 return I40E_ERR_PARAM;
101 dma_free_coherent(&adapter->pdev->dev, mem->size,
102 mem->va, (dma_addr_t)mem->pa);
103 return 0;
104 }
105
106 /**
107 * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
108 * @hw: pointer to the HW structure
109 * @mem: ptr to mem struct to fill out
110 * @size: size of memory requested
111 **/
112 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
113 struct i40e_virt_mem *mem, u32 size)
114 {
115 if (!mem)
116 return I40E_ERR_PARAM;
117
118 mem->size = size;
119 mem->va = kzalloc(size, GFP_KERNEL);
120
121 if (mem->va)
122 return 0;
123 else
124 return I40E_ERR_NO_MEMORY;
125 }
126
127 /**
128 * i40evf_free_virt_mem_d - OS specific memory free for shared code
129 * @hw: pointer to the HW structure
130 * @mem: ptr to mem struct to free
131 **/
132 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
133 struct i40e_virt_mem *mem)
134 {
135 if (!mem)
136 return I40E_ERR_PARAM;
137
138 /* it's ok to kfree a NULL pointer */
139 kfree(mem->va);
140
141 return 0;
142 }
143
144 /**
145 * i40evf_debug_d - OS dependent version of debug printing
146 * @hw: pointer to the HW structure
147 * @mask: debug level mask
148 * @fmt_str: printf-type format description
149 **/
150 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
151 {
152 char buf[512];
153 va_list argptr;
154
155 if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
156 return;
157
158 va_start(argptr, fmt_str);
159 vsnprintf(buf, sizeof(buf), fmt_str, argptr);
160 va_end(argptr);
161
162 /* the debug string is already formatted with a newline */
163 pr_info("%s", buf);
164 }
165
166 /**
167 * i40evf_tx_timeout - Respond to a Tx Hang
168 * @netdev: network interface device structure
169 **/
170 static void i40evf_tx_timeout(struct net_device *netdev)
171 {
172 struct i40evf_adapter *adapter = netdev_priv(netdev);
173
174 adapter->tx_timeout_count++;
175 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) {
176 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
177 schedule_work(&adapter->reset_task);
178 }
179 }
180
181 /**
182 * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
183 * @adapter: board private structure
184 **/
185 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
186 {
187 struct i40e_hw *hw = &adapter->hw;
188 wr32(hw, I40E_VFINT_DYN_CTL01, 0);
189
190 /* read flush */
191 rd32(hw, I40E_VFGEN_RSTAT);
192
193 synchronize_irq(adapter->msix_entries[0].vector);
194 }
195
196 /**
197 * i40evf_misc_irq_enable - Enable default interrupt generation settings
198 * @adapter: board private structure
199 **/
200 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
201 {
202 struct i40e_hw *hw = &adapter->hw;
203 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
204 I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
205 wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA_ADMINQ_MASK);
206
207 /* read flush */
208 rd32(hw, I40E_VFGEN_RSTAT);
209 }
210
211 /**
212 * i40evf_irq_disable - Mask off interrupt generation on the NIC
213 * @adapter: board private structure
214 **/
215 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
216 {
217 int i;
218 struct i40e_hw *hw = &adapter->hw;
219
220 if (!adapter->msix_entries)
221 return;
222
223 for (i = 1; i < adapter->num_msix_vectors; i++) {
224 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
225 synchronize_irq(adapter->msix_entries[i].vector);
226 }
227 /* read flush */
228 rd32(hw, I40E_VFGEN_RSTAT);
229
230 }
231
232 /**
233 * i40evf_irq_enable_queues - Enable interrupt for specified queues
234 * @adapter: board private structure
235 * @mask: bitmap of queues to enable
236 **/
237 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
238 {
239 struct i40e_hw *hw = &adapter->hw;
240 int i;
241
242 for (i = 1; i < adapter->num_msix_vectors; i++) {
243 if (mask & (1 << (i - 1))) {
244 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
245 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
246 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
247 }
248 }
249 }
250
251 /**
252 * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
253 * @adapter: board private structure
254 * @mask: bitmap of vectors to trigger
255 **/
256 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter,
257 u32 mask)
258 {
259 struct i40e_hw *hw = &adapter->hw;
260 int i;
261 uint32_t dyn_ctl;
262
263 if (mask & 1) {
264 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
265 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
266 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
267 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
268 }
269 for (i = 1; i < adapter->num_msix_vectors; i++) {
270 if (mask & (1 << i)) {
271 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
272 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
273 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
274 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
275 }
276 }
277 }
278
279 /**
280 * i40evf_irq_enable - Enable default interrupt generation settings
281 * @adapter: board private structure
282 **/
283 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
284 {
285 struct i40e_hw *hw = &adapter->hw;
286
287 i40evf_misc_irq_enable(adapter);
288 i40evf_irq_enable_queues(adapter, ~0);
289
290 if (flush)
291 rd32(hw, I40E_VFGEN_RSTAT);
292 }
293
294 /**
295 * i40evf_msix_aq - Interrupt handler for vector 0
296 * @irq: interrupt number
297 * @data: pointer to netdev
298 **/
299 static irqreturn_t i40evf_msix_aq(int irq, void *data)
300 {
301 struct net_device *netdev = data;
302 struct i40evf_adapter *adapter = netdev_priv(netdev);
303 struct i40e_hw *hw = &adapter->hw;
304 u32 val;
305 u32 ena_mask;
306
307 /* handle non-queue interrupts */
308 val = rd32(hw, I40E_VFINT_ICR01);
309 ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
310
311
312 val = rd32(hw, I40E_VFINT_DYN_CTL01);
313 val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
314 wr32(hw, I40E_VFINT_DYN_CTL01, val);
315
316 /* re-enable interrupt causes */
317 wr32(hw, I40E_VFINT_ICR0_ENA1, ena_mask);
318 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK);
319
320 /* schedule work on the private workqueue */
321 schedule_work(&adapter->adminq_task);
322
323 return IRQ_HANDLED;
324 }
325
326 /**
327 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
328 * @irq: interrupt number
329 * @data: pointer to a q_vector
330 **/
331 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
332 {
333 struct i40e_q_vector *q_vector = data;
334
335 if (!q_vector->tx.ring && !q_vector->rx.ring)
336 return IRQ_HANDLED;
337
338 napi_schedule(&q_vector->napi);
339
340 return IRQ_HANDLED;
341 }
342
343 /**
344 * i40evf_map_vector_to_rxq - associate irqs with rx queues
345 * @adapter: board private structure
346 * @v_idx: interrupt number
347 * @r_idx: queue number
348 **/
349 static void
350 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
351 {
352 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
353 struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
354
355 rx_ring->q_vector = q_vector;
356 rx_ring->next = q_vector->rx.ring;
357 rx_ring->vsi = &adapter->vsi;
358 q_vector->rx.ring = rx_ring;
359 q_vector->rx.count++;
360 q_vector->rx.latency_range = I40E_LOW_LATENCY;
361 }
362
363 /**
364 * i40evf_map_vector_to_txq - associate irqs with tx queues
365 * @adapter: board private structure
366 * @v_idx: interrupt number
367 * @t_idx: queue number
368 **/
369 static void
370 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
371 {
372 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
373 struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
374
375 tx_ring->q_vector = q_vector;
376 tx_ring->next = q_vector->tx.ring;
377 tx_ring->vsi = &adapter->vsi;
378 q_vector->tx.ring = tx_ring;
379 q_vector->tx.count++;
380 q_vector->tx.latency_range = I40E_LOW_LATENCY;
381 q_vector->num_ringpairs++;
382 q_vector->ring_mask |= (1 << t_idx);
383 }
384
385 /**
386 * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
387 * @adapter: board private structure to initialize
388 *
389 * This function maps descriptor rings to the queue-specific vectors
390 * we were allotted through the MSI-X enabling code. Ideally, we'd have
391 * one vector per ring/queue, but on a constrained vector budget, we
392 * group the rings as "efficiently" as possible. You would add new
393 * mapping configurations in here.
394 **/
395 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
396 {
397 int q_vectors;
398 int v_start = 0;
399 int rxr_idx = 0, txr_idx = 0;
400 int rxr_remaining = adapter->vsi_res->num_queue_pairs;
401 int txr_remaining = adapter->vsi_res->num_queue_pairs;
402 int i, j;
403 int rqpv, tqpv;
404 int err = 0;
405
406 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
407
408 /* The ideal configuration...
409 * We have enough vectors to map one per queue.
410 */
411 if (q_vectors == (rxr_remaining * 2)) {
412 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
413 i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
414
415 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
416 i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
417 goto out;
418 }
419
420 /* If we don't have enough vectors for a 1-to-1
421 * mapping, we'll have to group them so there are
422 * multiple queues per vector.
423 * Re-adjusting *qpv takes care of the remainder.
424 */
425 for (i = v_start; i < q_vectors; i++) {
426 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
427 for (j = 0; j < rqpv; j++) {
428 i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
429 rxr_idx++;
430 rxr_remaining--;
431 }
432 }
433 for (i = v_start; i < q_vectors; i++) {
434 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
435 for (j = 0; j < tqpv; j++) {
436 i40evf_map_vector_to_txq(adapter, i, txr_idx);
437 txr_idx++;
438 txr_remaining--;
439 }
440 }
441
442 out:
443 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
444
445 return err;
446 }
447
448 /**
449 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
450 * @adapter: board private structure
451 *
452 * Allocates MSI-X vectors for tx and rx handling, and requests
453 * interrupts from the kernel.
454 **/
455 static int
456 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
457 {
458 int vector, err, q_vectors;
459 int rx_int_idx = 0, tx_int_idx = 0;
460
461 i40evf_irq_disable(adapter);
462 /* Decrement for Other and TCP Timer vectors */
463 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
464
465 for (vector = 0; vector < q_vectors; vector++) {
466 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
467
468 if (q_vector->tx.ring && q_vector->rx.ring) {
469 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
470 "i40evf-%s-%s-%d", basename,
471 "TxRx", rx_int_idx++);
472 tx_int_idx++;
473 } else if (q_vector->rx.ring) {
474 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
475 "i40evf-%s-%s-%d", basename,
476 "rx", rx_int_idx++);
477 } else if (q_vector->tx.ring) {
478 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
479 "i40evf-%s-%s-%d", basename,
480 "tx", tx_int_idx++);
481 } else {
482 /* skip this unused q_vector */
483 continue;
484 }
485 err = request_irq(
486 adapter->msix_entries[vector + NONQ_VECS].vector,
487 i40evf_msix_clean_rings,
488 0,
489 q_vector->name,
490 q_vector);
491 if (err) {
492 dev_info(&adapter->pdev->dev,
493 "%s: request_irq failed, error: %d\n",
494 __func__, err);
495 goto free_queue_irqs;
496 }
497 /* assign the mask for this irq */
498 irq_set_affinity_hint(
499 adapter->msix_entries[vector + NONQ_VECS].vector,
500 q_vector->affinity_mask);
501 }
502
503 return 0;
504
505 free_queue_irqs:
506 while (vector) {
507 vector--;
508 irq_set_affinity_hint(
509 adapter->msix_entries[vector + NONQ_VECS].vector,
510 NULL);
511 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
512 adapter->q_vector[vector]);
513 }
514 return err;
515 }
516
517 /**
518 * i40evf_request_misc_irq - Initialize MSI-X interrupts
519 * @adapter: board private structure
520 *
521 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
522 * vector is only for the admin queue, and stays active even when the netdev
523 * is closed.
524 **/
525 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
526 {
527 struct net_device *netdev = adapter->netdev;
528 int err;
529
530 snprintf(adapter->misc_vector_name,
531 sizeof(adapter->misc_vector_name) - 1, "i40evf:mbx");
532 err = request_irq(adapter->msix_entries[0].vector,
533 &i40evf_msix_aq, 0,
534 adapter->misc_vector_name, netdev);
535 if (err) {
536 dev_err(&adapter->pdev->dev,
537 "request_irq for %s failed: %d\n",
538 adapter->misc_vector_name, err);
539 free_irq(adapter->msix_entries[0].vector, netdev);
540 }
541 return err;
542 }
543
544 /**
545 * i40evf_free_traffic_irqs - Free MSI-X interrupts
546 * @adapter: board private structure
547 *
548 * Frees all MSI-X vectors other than 0.
549 **/
550 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
551 {
552 int i;
553 int q_vectors;
554 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
555
556 for (i = 0; i < q_vectors; i++) {
557 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
558 NULL);
559 free_irq(adapter->msix_entries[i+1].vector,
560 adapter->q_vector[i]);
561 }
562 }
563
564 /**
565 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
566 * @adapter: board private structure
567 *
568 * Frees MSI-X vector 0.
569 **/
570 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
571 {
572 struct net_device *netdev = adapter->netdev;
573
574 free_irq(adapter->msix_entries[0].vector, netdev);
575 }
576
577 /**
578 * i40evf_configure_tx - Configure Transmit Unit after Reset
579 * @adapter: board private structure
580 *
581 * Configure the Tx unit of the MAC after a reset.
582 **/
583 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
584 {
585 struct i40e_hw *hw = &adapter->hw;
586 int i;
587 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
588 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
589 }
590
591 /**
592 * i40evf_configure_rx - Configure Receive Unit after Reset
593 * @adapter: board private structure
594 *
595 * Configure the Rx unit of the MAC after a reset.
596 **/
597 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
598 {
599 struct i40e_hw *hw = &adapter->hw;
600 struct net_device *netdev = adapter->netdev;
601 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
602 int i;
603 int rx_buf_len;
604
605
606 adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
607 adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
608
609 /* Decide whether to use packet split mode or not */
610 if (netdev->mtu > ETH_DATA_LEN) {
611 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
612 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
613 else
614 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
615 } else {
616 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
617 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
618 else
619 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
620 }
621
622 /* Set the RX buffer length according to the mode */
623 if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
624 rx_buf_len = I40E_RX_HDR_SIZE;
625 } else {
626 if (netdev->mtu <= ETH_DATA_LEN)
627 rx_buf_len = I40EVF_RXBUFFER_2048;
628 else
629 rx_buf_len = ALIGN(max_frame, 1024);
630 }
631
632 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
633 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
634 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
635 }
636 }
637
638 /**
639 * i40evf_find_vlan - Search filter list for specific vlan filter
640 * @adapter: board private structure
641 * @vlan: vlan tag
642 *
643 * Returns ptr to the filter object or NULL
644 **/
645 static struct
646 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
647 {
648 struct i40evf_vlan_filter *f;
649
650 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
651 if (vlan == f->vlan)
652 return f;
653 }
654 return NULL;
655 }
656
657 /**
658 * i40evf_add_vlan - Add a vlan filter to the list
659 * @adapter: board private structure
660 * @vlan: VLAN tag
661 *
662 * Returns ptr to the filter object or NULL when no memory available.
663 **/
664 static struct
665 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
666 {
667 struct i40evf_vlan_filter *f;
668
669 f = i40evf_find_vlan(adapter, vlan);
670 if (NULL == f) {
671 f = kzalloc(sizeof(*f), GFP_ATOMIC);
672 if (NULL == f)
673 return NULL;
674
675 f->vlan = vlan;
676
677 INIT_LIST_HEAD(&f->list);
678 list_add(&f->list, &adapter->vlan_filter_list);
679 f->add = true;
680 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
681 }
682
683 return f;
684 }
685
686 /**
687 * i40evf_del_vlan - Remove a vlan filter from the list
688 * @adapter: board private structure
689 * @vlan: VLAN tag
690 **/
691 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
692 {
693 struct i40evf_vlan_filter *f;
694
695 f = i40evf_find_vlan(adapter, vlan);
696 if (f) {
697 f->remove = true;
698 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
699 }
700 }
701
702 /**
703 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
704 * @netdev: network device struct
705 * @vid: VLAN tag
706 **/
707 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
708 __always_unused __be16 proto, u16 vid)
709 {
710 struct i40evf_adapter *adapter = netdev_priv(netdev);
711
712 if (i40evf_add_vlan(adapter, vid) == NULL)
713 return -ENOMEM;
714 return 0;
715 }
716
717 /**
718 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
719 * @netdev: network device struct
720 * @vid: VLAN tag
721 **/
722 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
723 __always_unused __be16 proto, u16 vid)
724 {
725 struct i40evf_adapter *adapter = netdev_priv(netdev);
726
727 i40evf_del_vlan(adapter, vid);
728 return 0;
729 }
730
731 /**
732 * i40evf_find_filter - Search filter list for specific mac filter
733 * @adapter: board private structure
734 * @macaddr: the MAC address
735 *
736 * Returns ptr to the filter object or NULL
737 **/
738 static struct
739 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
740 u8 *macaddr)
741 {
742 struct i40evf_mac_filter *f;
743
744 if (!macaddr)
745 return NULL;
746
747 list_for_each_entry(f, &adapter->mac_filter_list, list) {
748 if (ether_addr_equal(macaddr, f->macaddr))
749 return f;
750 }
751 return NULL;
752 }
753
754 /**
755 * i40e_add_filter - Add a mac filter to the filter list
756 * @adapter: board private structure
757 * @macaddr: the MAC address
758 *
759 * Returns ptr to the filter object or NULL when no memory available.
760 **/
761 static struct
762 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
763 u8 *macaddr)
764 {
765 struct i40evf_mac_filter *f;
766
767 if (!macaddr)
768 return NULL;
769
770 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
771 &adapter->crit_section))
772 udelay(1);
773
774 f = i40evf_find_filter(adapter, macaddr);
775 if (NULL == f) {
776 f = kzalloc(sizeof(*f), GFP_ATOMIC);
777 if (NULL == f) {
778 clear_bit(__I40EVF_IN_CRITICAL_TASK,
779 &adapter->crit_section);
780 return NULL;
781 }
782
783 ether_addr_copy(f->macaddr, macaddr);
784
785 list_add(&f->list, &adapter->mac_filter_list);
786 f->add = true;
787 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
788 }
789
790 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
791 return f;
792 }
793
794 /**
795 * i40evf_set_mac - NDO callback to set port mac address
796 * @netdev: network interface device structure
797 * @p: pointer to an address structure
798 *
799 * Returns 0 on success, negative on failure
800 **/
801 static int i40evf_set_mac(struct net_device *netdev, void *p)
802 {
803 struct i40evf_adapter *adapter = netdev_priv(netdev);
804 struct i40e_hw *hw = &adapter->hw;
805 struct i40evf_mac_filter *f;
806 struct sockaddr *addr = p;
807
808 if (!is_valid_ether_addr(addr->sa_data))
809 return -EADDRNOTAVAIL;
810
811 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
812 return 0;
813
814 f = i40evf_add_filter(adapter, addr->sa_data);
815 if (f) {
816 ether_addr_copy(hw->mac.addr, addr->sa_data);
817 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
818 }
819
820 return (f == NULL) ? -ENOMEM : 0;
821 }
822
823 /**
824 * i40evf_set_rx_mode - NDO callback to set the netdev filters
825 * @netdev: network interface device structure
826 **/
827 static void i40evf_set_rx_mode(struct net_device *netdev)
828 {
829 struct i40evf_adapter *adapter = netdev_priv(netdev);
830 struct i40evf_mac_filter *f, *ftmp;
831 struct netdev_hw_addr *uca;
832 struct netdev_hw_addr *mca;
833
834 /* add addr if not already in the filter list */
835 netdev_for_each_uc_addr(uca, netdev) {
836 i40evf_add_filter(adapter, uca->addr);
837 }
838 netdev_for_each_mc_addr(mca, netdev) {
839 i40evf_add_filter(adapter, mca->addr);
840 }
841
842 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
843 &adapter->crit_section))
844 udelay(1);
845 /* remove filter if not in netdev list */
846 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
847 bool found = false;
848
849 if (is_multicast_ether_addr(f->macaddr)) {
850 netdev_for_each_mc_addr(mca, netdev) {
851 if (ether_addr_equal(mca->addr, f->macaddr)) {
852 found = true;
853 break;
854 }
855 }
856 } else {
857 netdev_for_each_uc_addr(uca, netdev) {
858 if (ether_addr_equal(uca->addr, f->macaddr)) {
859 found = true;
860 break;
861 }
862 }
863 }
864 if (found) {
865 f->remove = true;
866 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
867 }
868 }
869 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
870 }
871
872 /**
873 * i40evf_napi_enable_all - enable NAPI on all queue vectors
874 * @adapter: board private structure
875 **/
876 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
877 {
878 int q_idx;
879 struct i40e_q_vector *q_vector;
880 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
881
882 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
883 struct napi_struct *napi;
884 q_vector = adapter->q_vector[q_idx];
885 napi = &q_vector->napi;
886 napi_enable(napi);
887 }
888 }
889
890 /**
891 * i40evf_napi_disable_all - disable NAPI on all queue vectors
892 * @adapter: board private structure
893 **/
894 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
895 {
896 int q_idx;
897 struct i40e_q_vector *q_vector;
898 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
899
900 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
901 q_vector = adapter->q_vector[q_idx];
902 napi_disable(&q_vector->napi);
903 }
904 }
905
906 /**
907 * i40evf_configure - set up transmit and receive data structures
908 * @adapter: board private structure
909 **/
910 static void i40evf_configure(struct i40evf_adapter *adapter)
911 {
912 struct net_device *netdev = adapter->netdev;
913 int i;
914
915 i40evf_set_rx_mode(netdev);
916
917 i40evf_configure_tx(adapter);
918 i40evf_configure_rx(adapter);
919 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
920
921 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
922 struct i40e_ring *ring = adapter->rx_rings[i];
923 i40evf_alloc_rx_buffers(ring, ring->count);
924 ring->next_to_use = ring->count - 1;
925 writel(ring->next_to_use, ring->tail);
926 }
927 }
928
929 /**
930 * i40evf_up_complete - Finish the last steps of bringing up a connection
931 * @adapter: board private structure
932 **/
933 static int i40evf_up_complete(struct i40evf_adapter *adapter)
934 {
935 adapter->state = __I40EVF_RUNNING;
936 clear_bit(__I40E_DOWN, &adapter->vsi.state);
937
938 i40evf_napi_enable_all(adapter);
939
940 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
941 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
942 return 0;
943 }
944
945 /**
946 * i40evf_clean_all_rx_rings - Free Rx Buffers for all queues
947 * @adapter: board private structure
948 **/
949 static void i40evf_clean_all_rx_rings(struct i40evf_adapter *adapter)
950 {
951 int i;
952
953 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
954 i40evf_clean_rx_ring(adapter->rx_rings[i]);
955 }
956
957 /**
958 * i40evf_clean_all_tx_rings - Free Tx Buffers for all queues
959 * @adapter: board private structure
960 **/
961 static void i40evf_clean_all_tx_rings(struct i40evf_adapter *adapter)
962 {
963 int i;
964
965 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
966 i40evf_clean_tx_ring(adapter->tx_rings[i]);
967 }
968
969 /**
970 * i40e_down - Shutdown the connection processing
971 * @adapter: board private structure
972 **/
973 void i40evf_down(struct i40evf_adapter *adapter)
974 {
975 struct net_device *netdev = adapter->netdev;
976 struct i40evf_mac_filter *f;
977
978 if (adapter->state == __I40EVF_DOWN)
979 return;
980
981 /* remove all MAC filters */
982 list_for_each_entry(f, &adapter->mac_filter_list, list) {
983 f->remove = true;
984 }
985 /* remove all VLAN filters */
986 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
987 f->remove = true;
988 }
989 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
990 adapter->state != __I40EVF_RESETTING) {
991 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
992 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
993 /* disable receives */
994 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
995 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
996 msleep(20);
997 }
998 netif_tx_disable(netdev);
999
1000 netif_tx_stop_all_queues(netdev);
1001
1002 i40evf_irq_disable(adapter);
1003
1004 i40evf_napi_disable_all(adapter);
1005
1006 netif_carrier_off(netdev);
1007
1008 i40evf_clean_all_tx_rings(adapter);
1009 i40evf_clean_all_rx_rings(adapter);
1010 }
1011
1012 /**
1013 * i40evf_acquire_msix_vectors - Setup the MSIX capability
1014 * @adapter: board private structure
1015 * @vectors: number of vectors to request
1016 *
1017 * Work with the OS to set up the MSIX vectors needed.
1018 *
1019 * Returns 0 on success, negative on failure
1020 **/
1021 static int
1022 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1023 {
1024 int err, vector_threshold;
1025
1026 /* We'll want at least 3 (vector_threshold):
1027 * 0) Other (Admin Queue and link, mostly)
1028 * 1) TxQ[0] Cleanup
1029 * 2) RxQ[0] Cleanup
1030 */
1031 vector_threshold = MIN_MSIX_COUNT;
1032
1033 /* The more we get, the more we will assign to Tx/Rx Cleanup
1034 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1035 * Right now, we simply care about how many we'll get; we'll
1036 * set them up later while requesting irq's.
1037 */
1038 err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1039 vector_threshold, vectors);
1040 if (err < 0) {
1041 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1042 kfree(adapter->msix_entries);
1043 adapter->msix_entries = NULL;
1044 return err;
1045 }
1046
1047 /* Adjust for only the vectors we'll use, which is minimum
1048 * of max_msix_q_vectors + NONQ_VECS, or the number of
1049 * vectors we were allocated.
1050 */
1051 adapter->num_msix_vectors = err;
1052 return 0;
1053 }
1054
1055 /**
1056 * i40evf_free_queues - Free memory for all rings
1057 * @adapter: board private structure to initialize
1058 *
1059 * Free all of the memory associated with queue pairs.
1060 **/
1061 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1062 {
1063 int i;
1064
1065 if (!adapter->vsi_res)
1066 return;
1067 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1068 if (adapter->tx_rings[i])
1069 kfree_rcu(adapter->tx_rings[i], rcu);
1070 adapter->tx_rings[i] = NULL;
1071 adapter->rx_rings[i] = NULL;
1072 }
1073 }
1074
1075 /**
1076 * i40evf_alloc_queues - Allocate memory for all rings
1077 * @adapter: board private structure to initialize
1078 *
1079 * We allocate one ring per queue at run-time since we don't know the
1080 * number of queues at compile-time. The polling_netdev array is
1081 * intended for Multiqueue, but should work fine with a single queue.
1082 **/
1083 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1084 {
1085 int i;
1086
1087 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1088 struct i40e_ring *tx_ring;
1089 struct i40e_ring *rx_ring;
1090
1091 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
1092 if (!tx_ring)
1093 goto err_out;
1094
1095 tx_ring->queue_index = i;
1096 tx_ring->netdev = adapter->netdev;
1097 tx_ring->dev = &adapter->pdev->dev;
1098 tx_ring->count = adapter->tx_desc_count;
1099 adapter->tx_rings[i] = tx_ring;
1100
1101 rx_ring = &tx_ring[1];
1102 rx_ring->queue_index = i;
1103 rx_ring->netdev = adapter->netdev;
1104 rx_ring->dev = &adapter->pdev->dev;
1105 rx_ring->count = adapter->rx_desc_count;
1106 adapter->rx_rings[i] = rx_ring;
1107 }
1108
1109 return 0;
1110
1111 err_out:
1112 i40evf_free_queues(adapter);
1113 return -ENOMEM;
1114 }
1115
1116 /**
1117 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1118 * @adapter: board private structure to initialize
1119 *
1120 * Attempt to configure the interrupts using the best available
1121 * capabilities of the hardware and the kernel.
1122 **/
1123 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1124 {
1125 int vector, v_budget;
1126 int pairs = 0;
1127 int err = 0;
1128
1129 if (!adapter->vsi_res) {
1130 err = -EIO;
1131 goto out;
1132 }
1133 pairs = adapter->vsi_res->num_queue_pairs;
1134
1135 /* It's easy to be greedy for MSI-X vectors, but it really
1136 * doesn't do us much good if we have a lot more vectors
1137 * than CPU's. So let's be conservative and only ask for
1138 * (roughly) twice the number of vectors as there are CPU's.
1139 */
1140 v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1141 v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1142
1143 adapter->msix_entries = kcalloc(v_budget,
1144 sizeof(struct msix_entry), GFP_KERNEL);
1145 if (!adapter->msix_entries) {
1146 err = -ENOMEM;
1147 goto out;
1148 }
1149
1150 for (vector = 0; vector < v_budget; vector++)
1151 adapter->msix_entries[vector].entry = vector;
1152
1153 i40evf_acquire_msix_vectors(adapter, v_budget);
1154
1155 out:
1156 adapter->netdev->real_num_tx_queues = pairs;
1157 return err;
1158 }
1159
1160 /**
1161 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1162 * @adapter: board private structure to initialize
1163 *
1164 * We allocate one q_vector per queue interrupt. If allocation fails we
1165 * return -ENOMEM.
1166 **/
1167 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1168 {
1169 int q_idx, num_q_vectors;
1170 struct i40e_q_vector *q_vector;
1171
1172 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1173
1174 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1175 q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
1176 if (!q_vector)
1177 goto err_out;
1178 q_vector->adapter = adapter;
1179 q_vector->vsi = &adapter->vsi;
1180 q_vector->v_idx = q_idx;
1181 netif_napi_add(adapter->netdev, &q_vector->napi,
1182 i40evf_napi_poll, NAPI_POLL_WEIGHT);
1183 adapter->q_vector[q_idx] = q_vector;
1184 }
1185
1186 return 0;
1187
1188 err_out:
1189 while (q_idx) {
1190 q_idx--;
1191 q_vector = adapter->q_vector[q_idx];
1192 netif_napi_del(&q_vector->napi);
1193 kfree(q_vector);
1194 adapter->q_vector[q_idx] = NULL;
1195 }
1196 return -ENOMEM;
1197 }
1198
1199 /**
1200 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1201 * @adapter: board private structure to initialize
1202 *
1203 * This function frees the memory allocated to the q_vectors. In addition if
1204 * NAPI is enabled it will delete any references to the NAPI struct prior
1205 * to freeing the q_vector.
1206 **/
1207 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1208 {
1209 int q_idx, num_q_vectors;
1210 int napi_vectors;
1211
1212 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1213 napi_vectors = adapter->vsi_res->num_queue_pairs;
1214
1215 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1216 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1217
1218 adapter->q_vector[q_idx] = NULL;
1219 if (q_idx < napi_vectors)
1220 netif_napi_del(&q_vector->napi);
1221 kfree(q_vector);
1222 }
1223 }
1224
1225 /**
1226 * i40evf_reset_interrupt_capability - Reset MSIX setup
1227 * @adapter: board private structure
1228 *
1229 **/
1230 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1231 {
1232 pci_disable_msix(adapter->pdev);
1233 kfree(adapter->msix_entries);
1234 adapter->msix_entries = NULL;
1235 }
1236
1237 /**
1238 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1239 * @adapter: board private structure to initialize
1240 *
1241 **/
1242 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1243 {
1244 int err;
1245
1246 err = i40evf_set_interrupt_capability(adapter);
1247 if (err) {
1248 dev_err(&adapter->pdev->dev,
1249 "Unable to setup interrupt capabilities\n");
1250 goto err_set_interrupt;
1251 }
1252
1253 err = i40evf_alloc_q_vectors(adapter);
1254 if (err) {
1255 dev_err(&adapter->pdev->dev,
1256 "Unable to allocate memory for queue vectors\n");
1257 goto err_alloc_q_vectors;
1258 }
1259
1260 err = i40evf_alloc_queues(adapter);
1261 if (err) {
1262 dev_err(&adapter->pdev->dev,
1263 "Unable to allocate memory for queues\n");
1264 goto err_alloc_queues;
1265 }
1266
1267 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1268 (adapter->vsi_res->num_queue_pairs > 1) ? "Enabled" :
1269 "Disabled", adapter->vsi_res->num_queue_pairs);
1270
1271 return 0;
1272 err_alloc_queues:
1273 i40evf_free_q_vectors(adapter);
1274 err_alloc_q_vectors:
1275 i40evf_reset_interrupt_capability(adapter);
1276 err_set_interrupt:
1277 return err;
1278 }
1279
1280 /**
1281 * i40evf_watchdog_timer - Periodic call-back timer
1282 * @data: pointer to adapter disguised as unsigned long
1283 **/
1284 static void i40evf_watchdog_timer(unsigned long data)
1285 {
1286 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1287 schedule_work(&adapter->watchdog_task);
1288 /* timer will be rescheduled in watchdog task */
1289 }
1290
1291 /**
1292 * i40evf_watchdog_task - Periodic call-back task
1293 * @work: pointer to work_struct
1294 **/
1295 static void i40evf_watchdog_task(struct work_struct *work)
1296 {
1297 struct i40evf_adapter *adapter = container_of(work,
1298 struct i40evf_adapter,
1299 watchdog_task);
1300 struct i40e_hw *hw = &adapter->hw;
1301 uint32_t rstat_val;
1302
1303 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1304 goto restart_watchdog;
1305
1306 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1307 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1308 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1309 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1310 (rstat_val == I40E_VFR_COMPLETED)) {
1311 /* A chance for redemption! */
1312 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1313 adapter->state = __I40EVF_STARTUP;
1314 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1315 schedule_delayed_work(&adapter->init_task, 10);
1316 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1317 &adapter->crit_section);
1318 /* Don't reschedule the watchdog, since we've restarted
1319 * the init task. When init_task contacts the PF and
1320 * gets everything set up again, it'll restart the
1321 * watchdog for us. Down, boy. Sit. Stay. Woof.
1322 */
1323 return;
1324 }
1325 adapter->aq_pending = 0;
1326 adapter->aq_required = 0;
1327 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1328 goto watchdog_done;
1329 }
1330
1331 if ((adapter->state < __I40EVF_DOWN) ||
1332 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1333 goto watchdog_done;
1334
1335 /* check for reset */
1336 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1337 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1338 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
1339 (rstat_val != I40E_VFR_VFACTIVE) &&
1340 (rstat_val != I40E_VFR_COMPLETED)) {
1341 adapter->state = __I40EVF_RESETTING;
1342 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1343 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1344 schedule_work(&adapter->reset_task);
1345 adapter->aq_pending = 0;
1346 adapter->aq_required = 0;
1347 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1348 goto watchdog_done;
1349 }
1350
1351 /* Process admin queue tasks. After init, everything gets done
1352 * here so we don't race on the admin queue.
1353 */
1354 if (adapter->aq_pending)
1355 goto watchdog_done;
1356
1357 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1358 i40evf_map_queues(adapter);
1359 goto watchdog_done;
1360 }
1361
1362 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1363 i40evf_add_ether_addrs(adapter);
1364 goto watchdog_done;
1365 }
1366
1367 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1368 i40evf_add_vlans(adapter);
1369 goto watchdog_done;
1370 }
1371
1372 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1373 i40evf_del_ether_addrs(adapter);
1374 goto watchdog_done;
1375 }
1376
1377 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1378 i40evf_del_vlans(adapter);
1379 goto watchdog_done;
1380 }
1381
1382 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1383 i40evf_disable_queues(adapter);
1384 goto watchdog_done;
1385 }
1386
1387 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1388 i40evf_configure_queues(adapter);
1389 goto watchdog_done;
1390 }
1391
1392 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1393 i40evf_enable_queues(adapter);
1394 goto watchdog_done;
1395 }
1396
1397 if (adapter->state == __I40EVF_RUNNING)
1398 i40evf_request_stats(adapter);
1399
1400 i40evf_irq_enable(adapter, true);
1401 i40evf_fire_sw_int(adapter, 0xFF);
1402
1403 watchdog_done:
1404 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1405 restart_watchdog:
1406 if (adapter->state == __I40EVF_REMOVE)
1407 return;
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 * next_queue - increment to next available tx queue
1418 * @adapter: board private structure
1419 * @j: queue counter
1420 *
1421 * Helper function for RSS programming to increment through available
1422 * queus. Returns the next queue value.
1423 **/
1424 static int next_queue(struct i40evf_adapter *adapter, int j)
1425 {
1426 j += 1;
1427
1428 return j >= adapter->vsi_res->num_queue_pairs ? 0 : j;
1429 }
1430
1431 /**
1432 * i40evf_configure_rss - Prepare for RSS if used
1433 * @adapter: board private structure
1434 **/
1435 static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1436 {
1437 struct i40e_hw *hw = &adapter->hw;
1438 u32 lut = 0;
1439 int i, j;
1440 u64 hena;
1441
1442 /* Set of random keys generated using kernel random number generator */
1443 static const u32 seed[I40E_VFQF_HKEY_MAX_INDEX + 1] = {
1444 0x794221b4, 0xbca0c5ab, 0x6cd5ebd9, 0x1ada6127,
1445 0x983b3aa1, 0x1c4e71eb, 0x7f6328b2, 0xfcdc0da0,
1446 0xc135cafa, 0x7a6f7e2d, 0xe7102d28, 0x163cd12e,
1447 0x4954b126 };
1448
1449 /* Hash type is configured by the PF - we just supply the key */
1450
1451 /* Fill out hash function seed */
1452 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1453 wr32(hw, I40E_VFQF_HKEY(i), seed[i]);
1454
1455 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1456 hena = I40E_DEFAULT_RSS_HENA;
1457 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1458 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1459
1460 /* Populate the LUT with max no. of queues in round robin fashion */
1461 j = adapter->vsi_res->num_queue_pairs;
1462 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
1463 j = next_queue(adapter, j);
1464 lut = j;
1465 j = next_queue(adapter, j);
1466 lut |= j << 8;
1467 j = next_queue(adapter, j);
1468 lut |= j << 16;
1469 j = next_queue(adapter, j);
1470 lut |= j << 24;
1471 wr32(hw, I40E_VFQF_HLUT(i), lut);
1472 }
1473 i40e_flush(hw);
1474 }
1475
1476 #define I40EVF_RESET_WAIT_MS 100
1477 #define I40EVF_RESET_WAIT_COUNT 200
1478 /**
1479 * i40evf_reset_task - Call-back task to handle hardware reset
1480 * @work: pointer to work_struct
1481 *
1482 * During reset we need to shut down and reinitialize the admin queue
1483 * before we can use it to communicate with the PF again. We also clear
1484 * and reinit the rings because that context is lost as well.
1485 **/
1486 static void i40evf_reset_task(struct work_struct *work)
1487 {
1488 struct i40evf_adapter *adapter = container_of(work,
1489 struct i40evf_adapter,
1490 reset_task);
1491 struct i40e_hw *hw = &adapter->hw;
1492 int i = 0, err;
1493 uint32_t rstat_val;
1494
1495 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1496 &adapter->crit_section))
1497 udelay(500);
1498
1499 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1500 dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
1501 i40evf_request_reset(adapter);
1502 }
1503
1504 /* poll until we see the reset actually happen */
1505 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1506 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1507 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1508 if ((rstat_val != I40E_VFR_VFACTIVE) &&
1509 (rstat_val != I40E_VFR_COMPLETED))
1510 break;
1511 else
1512 msleep(I40EVF_RESET_WAIT_MS);
1513 }
1514 if (i == I40EVF_RESET_WAIT_COUNT) {
1515 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1516 goto continue_reset; /* act like the reset happened */
1517 }
1518
1519 /* wait until the reset is complete and the PF is responding to us */
1520 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1521 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1522 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1523 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1524 (rstat_val == I40E_VFR_COMPLETED))
1525 break;
1526 else
1527 msleep(I40EVF_RESET_WAIT_MS);
1528 }
1529 if (i == I40EVF_RESET_WAIT_COUNT) {
1530 struct i40evf_mac_filter *f, *ftmp;
1531 struct i40evf_vlan_filter *fv, *fvtmp;
1532
1533 /* reset never finished */
1534 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1535 rstat_val);
1536 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1537
1538 if (netif_running(adapter->netdev)) {
1539 set_bit(__I40E_DOWN, &adapter->vsi.state);
1540 i40evf_down(adapter);
1541 i40evf_free_traffic_irqs(adapter);
1542 i40evf_free_all_tx_resources(adapter);
1543 i40evf_free_all_rx_resources(adapter);
1544 }
1545
1546 /* Delete all of the filters, both MAC and VLAN. */
1547 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1548 list) {
1549 list_del(&f->list);
1550 kfree(f);
1551 }
1552 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1553 list) {
1554 list_del(&fv->list);
1555 kfree(fv);
1556 }
1557
1558 i40evf_free_misc_irq(adapter);
1559 i40evf_reset_interrupt_capability(adapter);
1560 i40evf_free_queues(adapter);
1561 i40evf_free_q_vectors(adapter);
1562 kfree(adapter->vf_res);
1563 i40evf_shutdown_adminq(hw);
1564 adapter->netdev->flags &= ~IFF_UP;
1565 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1566 return; /* Do not attempt to reinit. It's dead, Jim. */
1567 }
1568
1569 continue_reset:
1570 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1571
1572 i40evf_down(adapter);
1573 adapter->state = __I40EVF_RESETTING;
1574
1575 /* kill and reinit the admin queue */
1576 if (i40evf_shutdown_adminq(hw))
1577 dev_warn(&adapter->pdev->dev,
1578 "%s: Failed to destroy the Admin Queue resources\n",
1579 __func__);
1580 err = i40evf_init_adminq(hw);
1581 if (err)
1582 dev_info(&adapter->pdev->dev, "%s: init_adminq failed: %d\n",
1583 __func__, err);
1584
1585 adapter->aq_pending = 0;
1586 adapter->aq_required = 0;
1587 i40evf_map_queues(adapter);
1588 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1589
1590 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1591
1592 if (netif_running(adapter->netdev)) {
1593 /* allocate transmit descriptors */
1594 err = i40evf_setup_all_tx_resources(adapter);
1595 if (err)
1596 goto reset_err;
1597
1598 /* allocate receive descriptors */
1599 err = i40evf_setup_all_rx_resources(adapter);
1600 if (err)
1601 goto reset_err;
1602
1603 i40evf_configure(adapter);
1604
1605 err = i40evf_up_complete(adapter);
1606 if (err)
1607 goto reset_err;
1608
1609 i40evf_irq_enable(adapter, true);
1610 }
1611 return;
1612 reset_err:
1613 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1614 i40evf_close(adapter->netdev);
1615 }
1616
1617 /**
1618 * i40evf_adminq_task - worker thread to clean the admin queue
1619 * @work: pointer to work_struct containing our data
1620 **/
1621 static void i40evf_adminq_task(struct work_struct *work)
1622 {
1623 struct i40evf_adapter *adapter =
1624 container_of(work, struct i40evf_adapter, adminq_task);
1625 struct i40e_hw *hw = &adapter->hw;
1626 struct i40e_arq_event_info event;
1627 struct i40e_virtchnl_msg *v_msg;
1628 i40e_status ret;
1629 u32 val, oldval;
1630 u16 pending;
1631
1632 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1633 return;
1634
1635 event.msg_size = I40EVF_MAX_AQ_BUF_SIZE;
1636 event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
1637 if (!event.msg_buf)
1638 return;
1639
1640 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1641 do {
1642 ret = i40evf_clean_arq_element(hw, &event, &pending);
1643 if (ret)
1644 break; /* No event to process or error cleaning ARQ */
1645
1646 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1647 v_msg->v_retval, event.msg_buf,
1648 event.msg_size);
1649 if (pending != 0) {
1650 dev_info(&adapter->pdev->dev,
1651 "%s: ARQ: Pending events %d\n",
1652 __func__, pending);
1653 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1654 }
1655 } while (pending);
1656
1657 /* check for error indications */
1658 val = rd32(hw, hw->aq.arq.len);
1659 oldval = val;
1660 if (val & I40E_VF_ARQLEN_ARQVFE_MASK) {
1661 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1662 val &= ~I40E_VF_ARQLEN_ARQVFE_MASK;
1663 }
1664 if (val & I40E_VF_ARQLEN_ARQOVFL_MASK) {
1665 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1666 val &= ~I40E_VF_ARQLEN_ARQOVFL_MASK;
1667 }
1668 if (val & I40E_VF_ARQLEN_ARQCRIT_MASK) {
1669 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1670 val &= ~I40E_VF_ARQLEN_ARQCRIT_MASK;
1671 }
1672 if (oldval != val)
1673 wr32(hw, hw->aq.arq.len, val);
1674
1675 val = rd32(hw, hw->aq.asq.len);
1676 oldval = val;
1677 if (val & I40E_VF_ATQLEN_ATQVFE_MASK) {
1678 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1679 val &= ~I40E_VF_ATQLEN_ATQVFE_MASK;
1680 }
1681 if (val & I40E_VF_ATQLEN_ATQOVFL_MASK) {
1682 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1683 val &= ~I40E_VF_ATQLEN_ATQOVFL_MASK;
1684 }
1685 if (val & I40E_VF_ATQLEN_ATQCRIT_MASK) {
1686 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1687 val &= ~I40E_VF_ATQLEN_ATQCRIT_MASK;
1688 }
1689 if (oldval != val)
1690 wr32(hw, hw->aq.asq.len, val);
1691
1692 /* re-enable Admin queue interrupt cause */
1693 i40evf_misc_irq_enable(adapter);
1694
1695 kfree(event.msg_buf);
1696 }
1697
1698 /**
1699 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1700 * @adapter: board private structure
1701 *
1702 * Free all transmit software resources
1703 **/
1704 static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1705 {
1706 int i;
1707
1708 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1709 if (adapter->tx_rings[i]->desc)
1710 i40evf_free_tx_resources(adapter->tx_rings[i]);
1711
1712 }
1713
1714 /**
1715 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1716 * @adapter: board private structure
1717 *
1718 * If this function returns with an error, then it's possible one or
1719 * more of the rings is populated (while the rest are not). It is the
1720 * callers duty to clean those orphaned rings.
1721 *
1722 * Return 0 on success, negative on failure
1723 **/
1724 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1725 {
1726 int i, err = 0;
1727
1728 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1729 adapter->tx_rings[i]->count = adapter->tx_desc_count;
1730 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1731 if (!err)
1732 continue;
1733 dev_err(&adapter->pdev->dev,
1734 "%s: Allocation for Tx Queue %u failed\n",
1735 __func__, i);
1736 break;
1737 }
1738
1739 return err;
1740 }
1741
1742 /**
1743 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1744 * @adapter: board private structure
1745 *
1746 * If this function returns with an error, then it's possible one or
1747 * more of the rings is populated (while the rest are not). It is the
1748 * callers duty to clean those orphaned rings.
1749 *
1750 * Return 0 on success, negative on failure
1751 **/
1752 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1753 {
1754 int i, err = 0;
1755
1756 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1757 adapter->rx_rings[i]->count = adapter->rx_desc_count;
1758 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1759 if (!err)
1760 continue;
1761 dev_err(&adapter->pdev->dev,
1762 "%s: Allocation for Rx Queue %u failed\n",
1763 __func__, i);
1764 break;
1765 }
1766 return err;
1767 }
1768
1769 /**
1770 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1771 * @adapter: board private structure
1772 *
1773 * Free all receive software resources
1774 **/
1775 static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1776 {
1777 int i;
1778
1779 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1780 if (adapter->rx_rings[i]->desc)
1781 i40evf_free_rx_resources(adapter->rx_rings[i]);
1782 }
1783
1784 /**
1785 * i40evf_open - Called when a network interface is made active
1786 * @netdev: network interface device structure
1787 *
1788 * Returns 0 on success, negative value on failure
1789 *
1790 * The open entry point is called when a network interface is made
1791 * active by the system (IFF_UP). At this point all resources needed
1792 * for transmit and receive operations are allocated, the interrupt
1793 * handler is registered with the OS, the watchdog timer is started,
1794 * and the stack is notified that the interface is ready.
1795 **/
1796 static int i40evf_open(struct net_device *netdev)
1797 {
1798 struct i40evf_adapter *adapter = netdev_priv(netdev);
1799 int err;
1800
1801 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1802 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1803 return -EIO;
1804 }
1805 if (adapter->state != __I40EVF_DOWN)
1806 return -EBUSY;
1807
1808 /* allocate transmit descriptors */
1809 err = i40evf_setup_all_tx_resources(adapter);
1810 if (err)
1811 goto err_setup_tx;
1812
1813 /* allocate receive descriptors */
1814 err = i40evf_setup_all_rx_resources(adapter);
1815 if (err)
1816 goto err_setup_rx;
1817
1818 /* clear any pending interrupts, may auto mask */
1819 err = i40evf_request_traffic_irqs(adapter, netdev->name);
1820 if (err)
1821 goto err_req_irq;
1822
1823 i40evf_configure(adapter);
1824
1825 err = i40evf_up_complete(adapter);
1826 if (err)
1827 goto err_req_irq;
1828
1829 i40evf_irq_enable(adapter, true);
1830
1831 return 0;
1832
1833 err_req_irq:
1834 i40evf_down(adapter);
1835 i40evf_free_traffic_irqs(adapter);
1836 err_setup_rx:
1837 i40evf_free_all_rx_resources(adapter);
1838 err_setup_tx:
1839 i40evf_free_all_tx_resources(adapter);
1840
1841 return err;
1842 }
1843
1844 /**
1845 * i40evf_close - Disables a network interface
1846 * @netdev: network interface device structure
1847 *
1848 * Returns 0, this is not allowed to fail
1849 *
1850 * The close entry point is called when an interface is de-activated
1851 * by the OS. The hardware is still under the drivers control, but
1852 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1853 * are freed, along with all transmit and receive resources.
1854 **/
1855 static int i40evf_close(struct net_device *netdev)
1856 {
1857 struct i40evf_adapter *adapter = netdev_priv(netdev);
1858
1859 if (adapter->state <= __I40EVF_DOWN)
1860 return 0;
1861
1862
1863 set_bit(__I40E_DOWN, &adapter->vsi.state);
1864
1865 i40evf_down(adapter);
1866 adapter->state = __I40EVF_DOWN;
1867 i40evf_free_traffic_irqs(adapter);
1868
1869 i40evf_free_all_tx_resources(adapter);
1870 i40evf_free_all_rx_resources(adapter);
1871
1872 return 0;
1873 }
1874
1875 /**
1876 * i40evf_get_stats - Get System Network Statistics
1877 * @netdev: network interface device structure
1878 *
1879 * Returns the address of the device statistics structure.
1880 * The statistics are actually updated from the timer callback.
1881 **/
1882 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1883 {
1884 struct i40evf_adapter *adapter = netdev_priv(netdev);
1885
1886 /* only return the current stats */
1887 return &adapter->net_stats;
1888 }
1889
1890 /**
1891 * i40evf_reinit_locked - Software reinit
1892 * @adapter: board private structure
1893 *
1894 * Reinititalizes the ring structures in response to a software configuration
1895 * change. Roughly the same as close followed by open, but skips releasing
1896 * and reallocating the interrupts.
1897 **/
1898 void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1899 {
1900 struct net_device *netdev = adapter->netdev;
1901 int err;
1902
1903 WARN_ON(in_interrupt());
1904
1905 i40evf_down(adapter);
1906
1907 /* allocate transmit descriptors */
1908 err = i40evf_setup_all_tx_resources(adapter);
1909 if (err)
1910 goto err_reinit;
1911
1912 /* allocate receive descriptors */
1913 err = i40evf_setup_all_rx_resources(adapter);
1914 if (err)
1915 goto err_reinit;
1916
1917 i40evf_configure(adapter);
1918
1919 err = i40evf_up_complete(adapter);
1920 if (err)
1921 goto err_reinit;
1922
1923 i40evf_irq_enable(adapter, true);
1924 return;
1925
1926 err_reinit:
1927 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1928 i40evf_close(netdev);
1929 }
1930
1931 /**
1932 * i40evf_change_mtu - Change the Maximum Transfer Unit
1933 * @netdev: network interface device structure
1934 * @new_mtu: new value for maximum frame size
1935 *
1936 * Returns 0 on success, negative on failure
1937 **/
1938 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1939 {
1940 struct i40evf_adapter *adapter = netdev_priv(netdev);
1941 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1942
1943 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1944 return -EINVAL;
1945
1946 /* must set new MTU before calling down or up */
1947 netdev->mtu = new_mtu;
1948 i40evf_reinit_locked(adapter);
1949 return 0;
1950 }
1951
1952 static const struct net_device_ops i40evf_netdev_ops = {
1953 .ndo_open = i40evf_open,
1954 .ndo_stop = i40evf_close,
1955 .ndo_start_xmit = i40evf_xmit_frame,
1956 .ndo_get_stats = i40evf_get_stats,
1957 .ndo_set_rx_mode = i40evf_set_rx_mode,
1958 .ndo_validate_addr = eth_validate_addr,
1959 .ndo_set_mac_address = i40evf_set_mac,
1960 .ndo_change_mtu = i40evf_change_mtu,
1961 .ndo_tx_timeout = i40evf_tx_timeout,
1962 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
1963 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
1964 };
1965
1966 /**
1967 * i40evf_check_reset_complete - check that VF reset is complete
1968 * @hw: pointer to hw struct
1969 *
1970 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1971 **/
1972 static int i40evf_check_reset_complete(struct i40e_hw *hw)
1973 {
1974 u32 rstat;
1975 int i;
1976
1977 for (i = 0; i < 100; i++) {
1978 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
1979 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1980 if ((rstat == I40E_VFR_VFACTIVE) ||
1981 (rstat == I40E_VFR_COMPLETED))
1982 return 0;
1983 udelay(10);
1984 }
1985 return -EBUSY;
1986 }
1987
1988 /**
1989 * i40evf_init_task - worker thread to perform delayed initialization
1990 * @work: pointer to work_struct containing our data
1991 *
1992 * This task completes the work that was begun in probe. Due to the nature
1993 * of VF-PF communications, we may need to wait tens of milliseconds to get
1994 * reponses back from the PF. Rather than busy-wait in probe and bog down the
1995 * whole system, we'll do it in a task so we can sleep.
1996 * This task only runs during driver init. Once we've established
1997 * communications with the PF driver and set up our netdev, the watchdog
1998 * takes over.
1999 **/
2000 static void i40evf_init_task(struct work_struct *work)
2001 {
2002 struct i40evf_adapter *adapter = container_of(work,
2003 struct i40evf_adapter,
2004 init_task.work);
2005 struct net_device *netdev = adapter->netdev;
2006 struct i40evf_mac_filter *f;
2007 struct i40e_hw *hw = &adapter->hw;
2008 struct pci_dev *pdev = adapter->pdev;
2009 int i, err, bufsz;
2010
2011 switch (adapter->state) {
2012 case __I40EVF_STARTUP:
2013 /* driver loaded, probe complete */
2014 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2015 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2016 err = i40e_set_mac_type(hw);
2017 if (err) {
2018 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2019 err);
2020 goto err;
2021 }
2022 err = i40evf_check_reset_complete(hw);
2023 if (err) {
2024 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2025 err);
2026 goto err;
2027 }
2028 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2029 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2030 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2031 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2032
2033 err = i40evf_init_adminq(hw);
2034 if (err) {
2035 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2036 err);
2037 goto err;
2038 }
2039 err = i40evf_send_api_ver(adapter);
2040 if (err) {
2041 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2042 i40evf_shutdown_adminq(hw);
2043 goto err;
2044 }
2045 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2046 goto restart;
2047 case __I40EVF_INIT_VERSION_CHECK:
2048 if (!i40evf_asq_done(hw)) {
2049 dev_err(&pdev->dev, "Admin queue command never completed\n");
2050 goto err;
2051 }
2052
2053 /* aq msg sent, awaiting reply */
2054 err = i40evf_verify_api_ver(adapter);
2055 if (err) {
2056 dev_info(&pdev->dev, "Unable to verify API version (%d), retrying\n",
2057 err);
2058 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2059 dev_info(&pdev->dev, "Resending request\n");
2060 err = i40evf_send_api_ver(adapter);
2061 }
2062 goto err;
2063 }
2064 err = i40evf_send_vf_config_msg(adapter);
2065 if (err) {
2066 dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2067 err);
2068 goto err;
2069 }
2070 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2071 goto restart;
2072 case __I40EVF_INIT_GET_RESOURCES:
2073 /* aq msg sent, awaiting reply */
2074 if (!adapter->vf_res) {
2075 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2076 (I40E_MAX_VF_VSI *
2077 sizeof(struct i40e_virtchnl_vsi_resource));
2078 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2079 if (!adapter->vf_res)
2080 goto err;
2081 }
2082 err = i40evf_get_vf_config(adapter);
2083 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2084 goto restart;
2085 if (err) {
2086 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2087 err);
2088 goto err_alloc;
2089 }
2090 adapter->state = __I40EVF_INIT_SW;
2091 break;
2092 default:
2093 goto err_alloc;
2094 }
2095 /* got VF config message back from PF, now we can parse it */
2096 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2097 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2098 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2099 }
2100 if (!adapter->vsi_res) {
2101 dev_err(&pdev->dev, "No LAN VSI found\n");
2102 goto err_alloc;
2103 }
2104
2105 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2106
2107 netdev->netdev_ops = &i40evf_netdev_ops;
2108 i40evf_set_ethtool_ops(netdev);
2109 netdev->watchdog_timeo = 5 * HZ;
2110 netdev->features |= NETIF_F_HIGHDMA |
2111 NETIF_F_SG |
2112 NETIF_F_IP_CSUM |
2113 NETIF_F_SCTP_CSUM |
2114 NETIF_F_IPV6_CSUM |
2115 NETIF_F_TSO |
2116 NETIF_F_TSO6 |
2117 NETIF_F_RXCSUM |
2118 NETIF_F_GRO;
2119
2120 if (adapter->vf_res->vf_offload_flags
2121 & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2122 netdev->vlan_features = netdev->features;
2123 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2124 NETIF_F_HW_VLAN_CTAG_RX |
2125 NETIF_F_HW_VLAN_CTAG_FILTER;
2126 }
2127
2128 /* copy netdev features into list of user selectable features */
2129 netdev->hw_features |= netdev->features;
2130 netdev->hw_features &= ~NETIF_F_RXCSUM;
2131
2132 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2133 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2134 adapter->hw.mac.addr);
2135 random_ether_addr(adapter->hw.mac.addr);
2136 }
2137 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2138 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2139
2140 f = kzalloc(sizeof(*f), GFP_ATOMIC);
2141 if (NULL == f)
2142 goto err_sw_init;
2143
2144 ether_addr_copy(f->macaddr, adapter->hw.mac.addr);
2145 f->add = true;
2146 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2147
2148 list_add(&f->list, &adapter->mac_filter_list);
2149
2150 init_timer(&adapter->watchdog_timer);
2151 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2152 adapter->watchdog_timer.data = (unsigned long)adapter;
2153 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2154
2155 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2156 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2157 err = i40evf_init_interrupt_scheme(adapter);
2158 if (err)
2159 goto err_sw_init;
2160 i40evf_map_rings_to_vectors(adapter);
2161 i40evf_configure_rss(adapter);
2162 err = i40evf_request_misc_irq(adapter);
2163 if (err)
2164 goto err_sw_init;
2165
2166 netif_carrier_off(netdev);
2167
2168 adapter->vsi.id = adapter->vsi_res->vsi_id;
2169 adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2170 adapter->vsi.back = adapter;
2171 adapter->vsi.base_vector = 1;
2172 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2173 adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2174 ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2175 adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2176 ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2177 adapter->vsi.netdev = adapter->netdev;
2178
2179 if (!adapter->netdev_registered) {
2180 err = register_netdev(netdev);
2181 if (err)
2182 goto err_register;
2183 }
2184
2185 adapter->netdev_registered = true;
2186
2187 netif_tx_stop_all_queues(netdev);
2188
2189 dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2190 if (netdev->features & NETIF_F_GRO)
2191 dev_info(&pdev->dev, "GRO is enabled\n");
2192
2193 dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2194 adapter->state = __I40EVF_DOWN;
2195 set_bit(__I40E_DOWN, &adapter->vsi.state);
2196 i40evf_misc_irq_enable(adapter);
2197 return;
2198 restart:
2199 schedule_delayed_work(&adapter->init_task,
2200 msecs_to_jiffies(50));
2201 return;
2202
2203 err_register:
2204 i40evf_free_misc_irq(adapter);
2205 err_sw_init:
2206 i40evf_reset_interrupt_capability(adapter);
2207 err_alloc:
2208 kfree(adapter->vf_res);
2209 adapter->vf_res = NULL;
2210 err:
2211 /* Things went into the weeds, so try again later */
2212 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2213 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
2214 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2215 return; /* do not reschedule */
2216 }
2217 schedule_delayed_work(&adapter->init_task, HZ * 3);
2218 }
2219
2220 /**
2221 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2222 * @pdev: pci device structure
2223 **/
2224 static void i40evf_shutdown(struct pci_dev *pdev)
2225 {
2226 struct net_device *netdev = pci_get_drvdata(pdev);
2227
2228 netif_device_detach(netdev);
2229
2230 if (netif_running(netdev))
2231 i40evf_close(netdev);
2232
2233 #ifdef CONFIG_PM
2234 pci_save_state(pdev);
2235
2236 #endif
2237 pci_disable_device(pdev);
2238 }
2239
2240 /**
2241 * i40evf_probe - Device Initialization Routine
2242 * @pdev: PCI device information struct
2243 * @ent: entry in i40evf_pci_tbl
2244 *
2245 * Returns 0 on success, negative on failure
2246 *
2247 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2248 * The OS initialization, configuring of the adapter private structure,
2249 * and a hardware reset occur.
2250 **/
2251 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2252 {
2253 struct net_device *netdev;
2254 struct i40evf_adapter *adapter = NULL;
2255 struct i40e_hw *hw = NULL;
2256 int err;
2257
2258 err = pci_enable_device(pdev);
2259 if (err)
2260 return err;
2261
2262 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2263 if (err) {
2264 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2265 if (err) {
2266 dev_err(&pdev->dev,
2267 "DMA configuration failed: 0x%x\n", err);
2268 goto err_dma;
2269 }
2270 }
2271
2272 err = pci_request_regions(pdev, i40evf_driver_name);
2273 if (err) {
2274 dev_err(&pdev->dev,
2275 "pci_request_regions failed 0x%x\n", err);
2276 goto err_pci_reg;
2277 }
2278
2279 pci_enable_pcie_error_reporting(pdev);
2280
2281 pci_set_master(pdev);
2282
2283 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2284 MAX_TX_QUEUES);
2285 if (!netdev) {
2286 err = -ENOMEM;
2287 goto err_alloc_etherdev;
2288 }
2289
2290 SET_NETDEV_DEV(netdev, &pdev->dev);
2291
2292 pci_set_drvdata(pdev, netdev);
2293 adapter = netdev_priv(netdev);
2294
2295 adapter->netdev = netdev;
2296 adapter->pdev = pdev;
2297
2298 hw = &adapter->hw;
2299 hw->back = adapter;
2300
2301 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2302 adapter->state = __I40EVF_STARTUP;
2303
2304 /* Call save state here because it relies on the adapter struct. */
2305 pci_save_state(pdev);
2306
2307 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2308 pci_resource_len(pdev, 0));
2309 if (!hw->hw_addr) {
2310 err = -EIO;
2311 goto err_ioremap;
2312 }
2313 hw->vendor_id = pdev->vendor;
2314 hw->device_id = pdev->device;
2315 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2316 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2317 hw->subsystem_device_id = pdev->subsystem_device;
2318 hw->bus.device = PCI_SLOT(pdev->devfn);
2319 hw->bus.func = PCI_FUNC(pdev->devfn);
2320
2321 INIT_LIST_HEAD(&adapter->mac_filter_list);
2322 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2323
2324 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2325 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2326 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2327 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2328 schedule_delayed_work(&adapter->init_task, 10);
2329
2330 return 0;
2331
2332 err_ioremap:
2333 free_netdev(netdev);
2334 err_alloc_etherdev:
2335 pci_release_regions(pdev);
2336 err_pci_reg:
2337 err_dma:
2338 pci_disable_device(pdev);
2339 return err;
2340 }
2341
2342 #ifdef CONFIG_PM
2343 /**
2344 * i40evf_suspend - Power management suspend routine
2345 * @pdev: PCI device information struct
2346 * @state: unused
2347 *
2348 * Called when the system (VM) is entering sleep/suspend.
2349 **/
2350 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2351 {
2352 struct net_device *netdev = pci_get_drvdata(pdev);
2353 struct i40evf_adapter *adapter = netdev_priv(netdev);
2354 int retval = 0;
2355
2356 netif_device_detach(netdev);
2357
2358 if (netif_running(netdev)) {
2359 rtnl_lock();
2360 i40evf_down(adapter);
2361 rtnl_unlock();
2362 }
2363 i40evf_free_misc_irq(adapter);
2364 i40evf_reset_interrupt_capability(adapter);
2365
2366 retval = pci_save_state(pdev);
2367 if (retval)
2368 return retval;
2369
2370 pci_disable_device(pdev);
2371
2372 return 0;
2373 }
2374
2375 /**
2376 * i40evf_resume - Power managment resume routine
2377 * @pdev: PCI device information struct
2378 *
2379 * Called when the system (VM) is resumed from sleep/suspend.
2380 **/
2381 static int i40evf_resume(struct pci_dev *pdev)
2382 {
2383 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2384 struct net_device *netdev = adapter->netdev;
2385 u32 err;
2386
2387 pci_set_power_state(pdev, PCI_D0);
2388 pci_restore_state(pdev);
2389 /* pci_restore_state clears dev->state_saved so call
2390 * pci_save_state to restore it.
2391 */
2392 pci_save_state(pdev);
2393
2394 err = pci_enable_device_mem(pdev);
2395 if (err) {
2396 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2397 return err;
2398 }
2399 pci_set_master(pdev);
2400
2401 rtnl_lock();
2402 err = i40evf_set_interrupt_capability(adapter);
2403 if (err) {
2404 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2405 return err;
2406 }
2407 err = i40evf_request_misc_irq(adapter);
2408 rtnl_unlock();
2409 if (err) {
2410 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2411 return err;
2412 }
2413
2414 schedule_work(&adapter->reset_task);
2415
2416 netif_device_attach(netdev);
2417
2418 return err;
2419 }
2420
2421 #endif /* CONFIG_PM */
2422 /**
2423 * i40evf_remove - Device Removal Routine
2424 * @pdev: PCI device information struct
2425 *
2426 * i40evf_remove is called by the PCI subsystem to alert the driver
2427 * that it should release a PCI device. The could be caused by a
2428 * Hot-Plug event, or because the driver is going to be removed from
2429 * memory.
2430 **/
2431 static void i40evf_remove(struct pci_dev *pdev)
2432 {
2433 struct net_device *netdev = pci_get_drvdata(pdev);
2434 struct i40evf_adapter *adapter = netdev_priv(netdev);
2435 struct i40evf_mac_filter *f, *ftmp;
2436 struct i40e_hw *hw = &adapter->hw;
2437
2438 cancel_delayed_work_sync(&adapter->init_task);
2439 cancel_work_sync(&adapter->reset_task);
2440
2441 if (adapter->netdev_registered) {
2442 unregister_netdev(netdev);
2443 adapter->netdev_registered = false;
2444 }
2445 adapter->state = __I40EVF_REMOVE;
2446
2447 if (adapter->msix_entries) {
2448 i40evf_misc_irq_disable(adapter);
2449 i40evf_free_misc_irq(adapter);
2450 i40evf_reset_interrupt_capability(adapter);
2451 i40evf_free_q_vectors(adapter);
2452 }
2453
2454 if (adapter->watchdog_timer.function)
2455 del_timer_sync(&adapter->watchdog_timer);
2456
2457 flush_scheduled_work();
2458
2459 if (hw->aq.asq.count)
2460 i40evf_shutdown_adminq(hw);
2461
2462 iounmap(hw->hw_addr);
2463 pci_release_regions(pdev);
2464
2465 i40evf_free_queues(adapter);
2466 kfree(adapter->vf_res);
2467 /* If we got removed before an up/down sequence, we've got a filter
2468 * hanging out there that we need to get rid of.
2469 */
2470 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2471 list_del(&f->list);
2472 kfree(f);
2473 }
2474
2475 free_netdev(netdev);
2476
2477 pci_disable_pcie_error_reporting(pdev);
2478
2479 pci_disable_device(pdev);
2480 }
2481
2482 static struct pci_driver i40evf_driver = {
2483 .name = i40evf_driver_name,
2484 .id_table = i40evf_pci_tbl,
2485 .probe = i40evf_probe,
2486 .remove = i40evf_remove,
2487 #ifdef CONFIG_PM
2488 .suspend = i40evf_suspend,
2489 .resume = i40evf_resume,
2490 #endif
2491 .shutdown = i40evf_shutdown,
2492 };
2493
2494 /**
2495 * i40e_init_module - Driver Registration Routine
2496 *
2497 * i40e_init_module is the first routine called when the driver is
2498 * loaded. All it does is register with the PCI subsystem.
2499 **/
2500 static int __init i40evf_init_module(void)
2501 {
2502 int ret;
2503 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2504 i40evf_driver_version);
2505
2506 pr_info("%s\n", i40evf_copyright);
2507
2508 ret = pci_register_driver(&i40evf_driver);
2509 return ret;
2510 }
2511
2512 module_init(i40evf_init_module);
2513
2514 /**
2515 * i40e_exit_module - Driver Exit Cleanup Routine
2516 *
2517 * i40e_exit_module is called just before the driver is removed
2518 * from memory.
2519 **/
2520 static void __exit i40evf_exit_module(void)
2521 {
2522 pci_unregister_driver(&i40evf_driver);
2523 }
2524
2525 module_exit(i40evf_exit_module);
2526
2527 /* i40evf_main.c */
Linux kernel - Deliverables
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