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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net...
[deliverable/linux.git] / drivers / net / ethernet / intel / i40evf / i40evf_main.c
1 /*******************************************************************************
2 *
3 * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
4 * Copyright(c) 2013 - 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 usleep_range(500, 1000);
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 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1651 event.msg_size = I40EVF_MAX_AQ_BUF_SIZE;
1652 }
1653 } while (pending);
1654
1655 /* check for error indications */
1656 val = rd32(hw, hw->aq.arq.len);
1657 oldval = val;
1658 if (val & I40E_VF_ARQLEN_ARQVFE_MASK) {
1659 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1660 val &= ~I40E_VF_ARQLEN_ARQVFE_MASK;
1661 }
1662 if (val & I40E_VF_ARQLEN_ARQOVFL_MASK) {
1663 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1664 val &= ~I40E_VF_ARQLEN_ARQOVFL_MASK;
1665 }
1666 if (val & I40E_VF_ARQLEN_ARQCRIT_MASK) {
1667 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1668 val &= ~I40E_VF_ARQLEN_ARQCRIT_MASK;
1669 }
1670 if (oldval != val)
1671 wr32(hw, hw->aq.arq.len, val);
1672
1673 val = rd32(hw, hw->aq.asq.len);
1674 oldval = val;
1675 if (val & I40E_VF_ATQLEN_ATQVFE_MASK) {
1676 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1677 val &= ~I40E_VF_ATQLEN_ATQVFE_MASK;
1678 }
1679 if (val & I40E_VF_ATQLEN_ATQOVFL_MASK) {
1680 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1681 val &= ~I40E_VF_ATQLEN_ATQOVFL_MASK;
1682 }
1683 if (val & I40E_VF_ATQLEN_ATQCRIT_MASK) {
1684 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1685 val &= ~I40E_VF_ATQLEN_ATQCRIT_MASK;
1686 }
1687 if (oldval != val)
1688 wr32(hw, hw->aq.asq.len, val);
1689
1690 /* re-enable Admin queue interrupt cause */
1691 i40evf_misc_irq_enable(adapter);
1692
1693 kfree(event.msg_buf);
1694 }
1695
1696 /**
1697 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1698 * @adapter: board private structure
1699 *
1700 * Free all transmit software resources
1701 **/
1702 static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1703 {
1704 int i;
1705
1706 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1707 if (adapter->tx_rings[i]->desc)
1708 i40evf_free_tx_resources(adapter->tx_rings[i]);
1709
1710 }
1711
1712 /**
1713 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1714 * @adapter: board private structure
1715 *
1716 * If this function returns with an error, then it's possible one or
1717 * more of the rings is populated (while the rest are not). It is the
1718 * callers duty to clean those orphaned rings.
1719 *
1720 * Return 0 on success, negative on failure
1721 **/
1722 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1723 {
1724 int i, err = 0;
1725
1726 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1727 adapter->tx_rings[i]->count = adapter->tx_desc_count;
1728 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1729 if (!err)
1730 continue;
1731 dev_err(&adapter->pdev->dev,
1732 "%s: Allocation for Tx Queue %u failed\n",
1733 __func__, i);
1734 break;
1735 }
1736
1737 return err;
1738 }
1739
1740 /**
1741 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1742 * @adapter: board private structure
1743 *
1744 * If this function returns with an error, then it's possible one or
1745 * more of the rings is populated (while the rest are not). It is the
1746 * callers duty to clean those orphaned rings.
1747 *
1748 * Return 0 on success, negative on failure
1749 **/
1750 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1751 {
1752 int i, err = 0;
1753
1754 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1755 adapter->rx_rings[i]->count = adapter->rx_desc_count;
1756 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1757 if (!err)
1758 continue;
1759 dev_err(&adapter->pdev->dev,
1760 "%s: Allocation for Rx Queue %u failed\n",
1761 __func__, i);
1762 break;
1763 }
1764 return err;
1765 }
1766
1767 /**
1768 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1769 * @adapter: board private structure
1770 *
1771 * Free all receive software resources
1772 **/
1773 static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1774 {
1775 int i;
1776
1777 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1778 if (adapter->rx_rings[i]->desc)
1779 i40evf_free_rx_resources(adapter->rx_rings[i]);
1780 }
1781
1782 /**
1783 * i40evf_open - Called when a network interface is made active
1784 * @netdev: network interface device structure
1785 *
1786 * Returns 0 on success, negative value on failure
1787 *
1788 * The open entry point is called when a network interface is made
1789 * active by the system (IFF_UP). At this point all resources needed
1790 * for transmit and receive operations are allocated, the interrupt
1791 * handler is registered with the OS, the watchdog timer is started,
1792 * and the stack is notified that the interface is ready.
1793 **/
1794 static int i40evf_open(struct net_device *netdev)
1795 {
1796 struct i40evf_adapter *adapter = netdev_priv(netdev);
1797 int err;
1798
1799 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1800 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1801 return -EIO;
1802 }
1803 if (adapter->state != __I40EVF_DOWN)
1804 return -EBUSY;
1805
1806 /* allocate transmit descriptors */
1807 err = i40evf_setup_all_tx_resources(adapter);
1808 if (err)
1809 goto err_setup_tx;
1810
1811 /* allocate receive descriptors */
1812 err = i40evf_setup_all_rx_resources(adapter);
1813 if (err)
1814 goto err_setup_rx;
1815
1816 /* clear any pending interrupts, may auto mask */
1817 err = i40evf_request_traffic_irqs(adapter, netdev->name);
1818 if (err)
1819 goto err_req_irq;
1820
1821 i40evf_configure(adapter);
1822
1823 err = i40evf_up_complete(adapter);
1824 if (err)
1825 goto err_req_irq;
1826
1827 i40evf_irq_enable(adapter, true);
1828
1829 return 0;
1830
1831 err_req_irq:
1832 i40evf_down(adapter);
1833 i40evf_free_traffic_irqs(adapter);
1834 err_setup_rx:
1835 i40evf_free_all_rx_resources(adapter);
1836 err_setup_tx:
1837 i40evf_free_all_tx_resources(adapter);
1838
1839 return err;
1840 }
1841
1842 /**
1843 * i40evf_close - Disables a network interface
1844 * @netdev: network interface device structure
1845 *
1846 * Returns 0, this is not allowed to fail
1847 *
1848 * The close entry point is called when an interface is de-activated
1849 * by the OS. The hardware is still under the drivers control, but
1850 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1851 * are freed, along with all transmit and receive resources.
1852 **/
1853 static int i40evf_close(struct net_device *netdev)
1854 {
1855 struct i40evf_adapter *adapter = netdev_priv(netdev);
1856
1857 if (adapter->state <= __I40EVF_DOWN)
1858 return 0;
1859
1860
1861 set_bit(__I40E_DOWN, &adapter->vsi.state);
1862
1863 i40evf_down(adapter);
1864 adapter->state = __I40EVF_DOWN;
1865 i40evf_free_traffic_irqs(adapter);
1866
1867 i40evf_free_all_tx_resources(adapter);
1868 i40evf_free_all_rx_resources(adapter);
1869
1870 return 0;
1871 }
1872
1873 /**
1874 * i40evf_get_stats - Get System Network Statistics
1875 * @netdev: network interface device structure
1876 *
1877 * Returns the address of the device statistics structure.
1878 * The statistics are actually updated from the timer callback.
1879 **/
1880 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1881 {
1882 struct i40evf_adapter *adapter = netdev_priv(netdev);
1883
1884 /* only return the current stats */
1885 return &adapter->net_stats;
1886 }
1887
1888 /**
1889 * i40evf_reinit_locked - Software reinit
1890 * @adapter: board private structure
1891 *
1892 * Reinititalizes the ring structures in response to a software configuration
1893 * change. Roughly the same as close followed by open, but skips releasing
1894 * and reallocating the interrupts.
1895 **/
1896 void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1897 {
1898 struct net_device *netdev = adapter->netdev;
1899 int err;
1900
1901 WARN_ON(in_interrupt());
1902
1903 i40evf_down(adapter);
1904
1905 /* allocate transmit descriptors */
1906 err = i40evf_setup_all_tx_resources(adapter);
1907 if (err)
1908 goto err_reinit;
1909
1910 /* allocate receive descriptors */
1911 err = i40evf_setup_all_rx_resources(adapter);
1912 if (err)
1913 goto err_reinit;
1914
1915 i40evf_configure(adapter);
1916
1917 err = i40evf_up_complete(adapter);
1918 if (err)
1919 goto err_reinit;
1920
1921 i40evf_irq_enable(adapter, true);
1922 return;
1923
1924 err_reinit:
1925 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1926 i40evf_close(netdev);
1927 }
1928
1929 /**
1930 * i40evf_change_mtu - Change the Maximum Transfer Unit
1931 * @netdev: network interface device structure
1932 * @new_mtu: new value for maximum frame size
1933 *
1934 * Returns 0 on success, negative on failure
1935 **/
1936 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1937 {
1938 struct i40evf_adapter *adapter = netdev_priv(netdev);
1939 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1940
1941 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1942 return -EINVAL;
1943
1944 /* must set new MTU before calling down or up */
1945 netdev->mtu = new_mtu;
1946 i40evf_reinit_locked(adapter);
1947 return 0;
1948 }
1949
1950 static const struct net_device_ops i40evf_netdev_ops = {
1951 .ndo_open = i40evf_open,
1952 .ndo_stop = i40evf_close,
1953 .ndo_start_xmit = i40evf_xmit_frame,
1954 .ndo_get_stats = i40evf_get_stats,
1955 .ndo_set_rx_mode = i40evf_set_rx_mode,
1956 .ndo_validate_addr = eth_validate_addr,
1957 .ndo_set_mac_address = i40evf_set_mac,
1958 .ndo_change_mtu = i40evf_change_mtu,
1959 .ndo_tx_timeout = i40evf_tx_timeout,
1960 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
1961 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
1962 };
1963
1964 /**
1965 * i40evf_check_reset_complete - check that VF reset is complete
1966 * @hw: pointer to hw struct
1967 *
1968 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1969 **/
1970 static int i40evf_check_reset_complete(struct i40e_hw *hw)
1971 {
1972 u32 rstat;
1973 int i;
1974
1975 for (i = 0; i < 100; i++) {
1976 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
1977 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1978 if ((rstat == I40E_VFR_VFACTIVE) ||
1979 (rstat == I40E_VFR_COMPLETED))
1980 return 0;
1981 usleep_range(10, 20);
1982 }
1983 return -EBUSY;
1984 }
1985
1986 /**
1987 * i40evf_init_task - worker thread to perform delayed initialization
1988 * @work: pointer to work_struct containing our data
1989 *
1990 * This task completes the work that was begun in probe. Due to the nature
1991 * of VF-PF communications, we may need to wait tens of milliseconds to get
1992 * reponses back from the PF. Rather than busy-wait in probe and bog down the
1993 * whole system, we'll do it in a task so we can sleep.
1994 * This task only runs during driver init. Once we've established
1995 * communications with the PF driver and set up our netdev, the watchdog
1996 * takes over.
1997 **/
1998 static void i40evf_init_task(struct work_struct *work)
1999 {
2000 struct i40evf_adapter *adapter = container_of(work,
2001 struct i40evf_adapter,
2002 init_task.work);
2003 struct net_device *netdev = adapter->netdev;
2004 struct i40evf_mac_filter *f;
2005 struct i40e_hw *hw = &adapter->hw;
2006 struct pci_dev *pdev = adapter->pdev;
2007 int i, err, bufsz;
2008
2009 switch (adapter->state) {
2010 case __I40EVF_STARTUP:
2011 /* driver loaded, probe complete */
2012 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2013 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2014 err = i40e_set_mac_type(hw);
2015 if (err) {
2016 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2017 err);
2018 goto err;
2019 }
2020 err = i40evf_check_reset_complete(hw);
2021 if (err) {
2022 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2023 err);
2024 goto err;
2025 }
2026 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2027 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2028 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2029 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2030
2031 err = i40evf_init_adminq(hw);
2032 if (err) {
2033 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2034 err);
2035 goto err;
2036 }
2037 err = i40evf_send_api_ver(adapter);
2038 if (err) {
2039 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2040 i40evf_shutdown_adminq(hw);
2041 goto err;
2042 }
2043 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2044 goto restart;
2045 case __I40EVF_INIT_VERSION_CHECK:
2046 if (!i40evf_asq_done(hw)) {
2047 dev_err(&pdev->dev, "Admin queue command never completed\n");
2048 goto err;
2049 }
2050
2051 /* aq msg sent, awaiting reply */
2052 err = i40evf_verify_api_ver(adapter);
2053 if (err) {
2054 dev_info(&pdev->dev, "Unable to verify API version (%d), retrying\n",
2055 err);
2056 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2057 dev_info(&pdev->dev, "Resending request\n");
2058 err = i40evf_send_api_ver(adapter);
2059 }
2060 goto err;
2061 }
2062 err = i40evf_send_vf_config_msg(adapter);
2063 if (err) {
2064 dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2065 err);
2066 goto err;
2067 }
2068 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2069 goto restart;
2070 case __I40EVF_INIT_GET_RESOURCES:
2071 /* aq msg sent, awaiting reply */
2072 if (!adapter->vf_res) {
2073 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2074 (I40E_MAX_VF_VSI *
2075 sizeof(struct i40e_virtchnl_vsi_resource));
2076 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2077 if (!adapter->vf_res)
2078 goto err;
2079 }
2080 err = i40evf_get_vf_config(adapter);
2081 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2082 goto restart;
2083 if (err) {
2084 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2085 err);
2086 goto err_alloc;
2087 }
2088 adapter->state = __I40EVF_INIT_SW;
2089 break;
2090 default:
2091 goto err_alloc;
2092 }
2093 /* got VF config message back from PF, now we can parse it */
2094 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2095 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2096 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2097 }
2098 if (!adapter->vsi_res) {
2099 dev_err(&pdev->dev, "No LAN VSI found\n");
2100 goto err_alloc;
2101 }
2102
2103 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2104
2105 netdev->netdev_ops = &i40evf_netdev_ops;
2106 i40evf_set_ethtool_ops(netdev);
2107 netdev->watchdog_timeo = 5 * HZ;
2108 netdev->features |= NETIF_F_HIGHDMA |
2109 NETIF_F_SG |
2110 NETIF_F_IP_CSUM |
2111 NETIF_F_SCTP_CSUM |
2112 NETIF_F_IPV6_CSUM |
2113 NETIF_F_TSO |
2114 NETIF_F_TSO6 |
2115 NETIF_F_RXCSUM |
2116 NETIF_F_GRO;
2117
2118 if (adapter->vf_res->vf_offload_flags
2119 & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2120 netdev->vlan_features = netdev->features;
2121 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2122 NETIF_F_HW_VLAN_CTAG_RX |
2123 NETIF_F_HW_VLAN_CTAG_FILTER;
2124 }
2125
2126 /* copy netdev features into list of user selectable features */
2127 netdev->hw_features |= netdev->features;
2128 netdev->hw_features &= ~NETIF_F_RXCSUM;
2129
2130 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2131 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2132 adapter->hw.mac.addr);
2133 random_ether_addr(adapter->hw.mac.addr);
2134 }
2135 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2136 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2137
2138 f = kzalloc(sizeof(*f), GFP_ATOMIC);
2139 if (NULL == f)
2140 goto err_sw_init;
2141
2142 ether_addr_copy(f->macaddr, adapter->hw.mac.addr);
2143 f->add = true;
2144 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2145
2146 list_add(&f->list, &adapter->mac_filter_list);
2147
2148 init_timer(&adapter->watchdog_timer);
2149 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2150 adapter->watchdog_timer.data = (unsigned long)adapter;
2151 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2152
2153 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2154 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2155 err = i40evf_init_interrupt_scheme(adapter);
2156 if (err)
2157 goto err_sw_init;
2158 i40evf_map_rings_to_vectors(adapter);
2159 i40evf_configure_rss(adapter);
2160 err = i40evf_request_misc_irq(adapter);
2161 if (err)
2162 goto err_sw_init;
2163
2164 netif_carrier_off(netdev);
2165
2166 adapter->vsi.id = adapter->vsi_res->vsi_id;
2167 adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2168 adapter->vsi.back = adapter;
2169 adapter->vsi.base_vector = 1;
2170 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2171 adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2172 ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2173 adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2174 ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2175 adapter->vsi.netdev = adapter->netdev;
2176
2177 if (!adapter->netdev_registered) {
2178 err = register_netdev(netdev);
2179 if (err)
2180 goto err_register;
2181 }
2182
2183 adapter->netdev_registered = true;
2184
2185 netif_tx_stop_all_queues(netdev);
2186
2187 dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2188 if (netdev->features & NETIF_F_GRO)
2189 dev_info(&pdev->dev, "GRO is enabled\n");
2190
2191 dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2192 adapter->state = __I40EVF_DOWN;
2193 set_bit(__I40E_DOWN, &adapter->vsi.state);
2194 i40evf_misc_irq_enable(adapter);
2195 return;
2196 restart:
2197 schedule_delayed_work(&adapter->init_task,
2198 msecs_to_jiffies(50));
2199 return;
2200
2201 err_register:
2202 i40evf_free_misc_irq(adapter);
2203 err_sw_init:
2204 i40evf_reset_interrupt_capability(adapter);
2205 err_alloc:
2206 kfree(adapter->vf_res);
2207 adapter->vf_res = NULL;
2208 err:
2209 /* Things went into the weeds, so try again later */
2210 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2211 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
2212 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2213 return; /* do not reschedule */
2214 }
2215 schedule_delayed_work(&adapter->init_task, HZ * 3);
2216 }
2217
2218 /**
2219 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2220 * @pdev: pci device structure
2221 **/
2222 static void i40evf_shutdown(struct pci_dev *pdev)
2223 {
2224 struct net_device *netdev = pci_get_drvdata(pdev);
2225
2226 netif_device_detach(netdev);
2227
2228 if (netif_running(netdev))
2229 i40evf_close(netdev);
2230
2231 #ifdef CONFIG_PM
2232 pci_save_state(pdev);
2233
2234 #endif
2235 pci_disable_device(pdev);
2236 }
2237
2238 /**
2239 * i40evf_probe - Device Initialization Routine
2240 * @pdev: PCI device information struct
2241 * @ent: entry in i40evf_pci_tbl
2242 *
2243 * Returns 0 on success, negative on failure
2244 *
2245 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2246 * The OS initialization, configuring of the adapter private structure,
2247 * and a hardware reset occur.
2248 **/
2249 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2250 {
2251 struct net_device *netdev;
2252 struct i40evf_adapter *adapter = NULL;
2253 struct i40e_hw *hw = NULL;
2254 int err;
2255
2256 err = pci_enable_device(pdev);
2257 if (err)
2258 return err;
2259
2260 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2261 if (err) {
2262 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2263 if (err) {
2264 dev_err(&pdev->dev,
2265 "DMA configuration failed: 0x%x\n", err);
2266 goto err_dma;
2267 }
2268 }
2269
2270 err = pci_request_regions(pdev, i40evf_driver_name);
2271 if (err) {
2272 dev_err(&pdev->dev,
2273 "pci_request_regions failed 0x%x\n", err);
2274 goto err_pci_reg;
2275 }
2276
2277 pci_enable_pcie_error_reporting(pdev);
2278
2279 pci_set_master(pdev);
2280
2281 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2282 MAX_TX_QUEUES);
2283 if (!netdev) {
2284 err = -ENOMEM;
2285 goto err_alloc_etherdev;
2286 }
2287
2288 SET_NETDEV_DEV(netdev, &pdev->dev);
2289
2290 pci_set_drvdata(pdev, netdev);
2291 adapter = netdev_priv(netdev);
2292
2293 adapter->netdev = netdev;
2294 adapter->pdev = pdev;
2295
2296 hw = &adapter->hw;
2297 hw->back = adapter;
2298
2299 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2300 adapter->state = __I40EVF_STARTUP;
2301
2302 /* Call save state here because it relies on the adapter struct. */
2303 pci_save_state(pdev);
2304
2305 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2306 pci_resource_len(pdev, 0));
2307 if (!hw->hw_addr) {
2308 err = -EIO;
2309 goto err_ioremap;
2310 }
2311 hw->vendor_id = pdev->vendor;
2312 hw->device_id = pdev->device;
2313 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2314 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2315 hw->subsystem_device_id = pdev->subsystem_device;
2316 hw->bus.device = PCI_SLOT(pdev->devfn);
2317 hw->bus.func = PCI_FUNC(pdev->devfn);
2318
2319 INIT_LIST_HEAD(&adapter->mac_filter_list);
2320 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2321
2322 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2323 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2324 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2325 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2326 schedule_delayed_work(&adapter->init_task, 10);
2327
2328 return 0;
2329
2330 err_ioremap:
2331 free_netdev(netdev);
2332 err_alloc_etherdev:
2333 pci_release_regions(pdev);
2334 err_pci_reg:
2335 err_dma:
2336 pci_disable_device(pdev);
2337 return err;
2338 }
2339
2340 #ifdef CONFIG_PM
2341 /**
2342 * i40evf_suspend - Power management suspend routine
2343 * @pdev: PCI device information struct
2344 * @state: unused
2345 *
2346 * Called when the system (VM) is entering sleep/suspend.
2347 **/
2348 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2349 {
2350 struct net_device *netdev = pci_get_drvdata(pdev);
2351 struct i40evf_adapter *adapter = netdev_priv(netdev);
2352 int retval = 0;
2353
2354 netif_device_detach(netdev);
2355
2356 if (netif_running(netdev)) {
2357 rtnl_lock();
2358 i40evf_down(adapter);
2359 rtnl_unlock();
2360 }
2361 i40evf_free_misc_irq(adapter);
2362 i40evf_reset_interrupt_capability(adapter);
2363
2364 retval = pci_save_state(pdev);
2365 if (retval)
2366 return retval;
2367
2368 pci_disable_device(pdev);
2369
2370 return 0;
2371 }
2372
2373 /**
2374 * i40evf_resume - Power managment resume routine
2375 * @pdev: PCI device information struct
2376 *
2377 * Called when the system (VM) is resumed from sleep/suspend.
2378 **/
2379 static int i40evf_resume(struct pci_dev *pdev)
2380 {
2381 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2382 struct net_device *netdev = adapter->netdev;
2383 u32 err;
2384
2385 pci_set_power_state(pdev, PCI_D0);
2386 pci_restore_state(pdev);
2387 /* pci_restore_state clears dev->state_saved so call
2388 * pci_save_state to restore it.
2389 */
2390 pci_save_state(pdev);
2391
2392 err = pci_enable_device_mem(pdev);
2393 if (err) {
2394 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2395 return err;
2396 }
2397 pci_set_master(pdev);
2398
2399 rtnl_lock();
2400 err = i40evf_set_interrupt_capability(adapter);
2401 if (err) {
2402 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2403 return err;
2404 }
2405 err = i40evf_request_misc_irq(adapter);
2406 rtnl_unlock();
2407 if (err) {
2408 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2409 return err;
2410 }
2411
2412 schedule_work(&adapter->reset_task);
2413
2414 netif_device_attach(netdev);
2415
2416 return err;
2417 }
2418
2419 #endif /* CONFIG_PM */
2420 /**
2421 * i40evf_remove - Device Removal Routine
2422 * @pdev: PCI device information struct
2423 *
2424 * i40evf_remove is called by the PCI subsystem to alert the driver
2425 * that it should release a PCI device. The could be caused by a
2426 * Hot-Plug event, or because the driver is going to be removed from
2427 * memory.
2428 **/
2429 static void i40evf_remove(struct pci_dev *pdev)
2430 {
2431 struct net_device *netdev = pci_get_drvdata(pdev);
2432 struct i40evf_adapter *adapter = netdev_priv(netdev);
2433 struct i40evf_mac_filter *f, *ftmp;
2434 struct i40e_hw *hw = &adapter->hw;
2435
2436 cancel_delayed_work_sync(&adapter->init_task);
2437 cancel_work_sync(&adapter->reset_task);
2438
2439 if (adapter->netdev_registered) {
2440 unregister_netdev(netdev);
2441 adapter->netdev_registered = false;
2442 }
2443 adapter->state = __I40EVF_REMOVE;
2444
2445 if (adapter->msix_entries) {
2446 i40evf_misc_irq_disable(adapter);
2447 i40evf_free_misc_irq(adapter);
2448 i40evf_reset_interrupt_capability(adapter);
2449 i40evf_free_q_vectors(adapter);
2450 }
2451
2452 if (adapter->watchdog_timer.function)
2453 del_timer_sync(&adapter->watchdog_timer);
2454
2455 flush_scheduled_work();
2456
2457 if (hw->aq.asq.count)
2458 i40evf_shutdown_adminq(hw);
2459
2460 iounmap(hw->hw_addr);
2461 pci_release_regions(pdev);
2462
2463 i40evf_free_queues(adapter);
2464 kfree(adapter->vf_res);
2465 /* If we got removed before an up/down sequence, we've got a filter
2466 * hanging out there that we need to get rid of.
2467 */
2468 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2469 list_del(&f->list);
2470 kfree(f);
2471 }
2472
2473 free_netdev(netdev);
2474
2475 pci_disable_pcie_error_reporting(pdev);
2476
2477 pci_disable_device(pdev);
2478 }
2479
2480 static struct pci_driver i40evf_driver = {
2481 .name = i40evf_driver_name,
2482 .id_table = i40evf_pci_tbl,
2483 .probe = i40evf_probe,
2484 .remove = i40evf_remove,
2485 #ifdef CONFIG_PM
2486 .suspend = i40evf_suspend,
2487 .resume = i40evf_resume,
2488 #endif
2489 .shutdown = i40evf_shutdown,
2490 };
2491
2492 /**
2493 * i40e_init_module - Driver Registration Routine
2494 *
2495 * i40e_init_module is the first routine called when the driver is
2496 * loaded. All it does is register with the PCI subsystem.
2497 **/
2498 static int __init i40evf_init_module(void)
2499 {
2500 int ret;
2501 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2502 i40evf_driver_version);
2503
2504 pr_info("%s\n", i40evf_copyright);
2505
2506 ret = pci_register_driver(&i40evf_driver);
2507 return ret;
2508 }
2509
2510 module_init(i40evf_init_module);
2511
2512 /**
2513 * i40e_exit_module - Driver Exit Cleanup Routine
2514 *
2515 * i40e_exit_module is called just before the driver is removed
2516 * from memory.
2517 **/
2518 static void __exit i40evf_exit_module(void)
2519 {
2520 pci_unregister_driver(&i40evf_driver);
2521 }
2522
2523 module_exit(i40evf_exit_module);
2524
2525 /* i40evf_main.c */
Linux kernel - Deliverables
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