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i40evf: make comparisons consistent
[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
189 wr32(hw, I40E_VFINT_DYN_CTL01, 0);
190
191 /* read flush */
192 rd32(hw, I40E_VFGEN_RSTAT);
193
194 synchronize_irq(adapter->msix_entries[0].vector);
195 }
196
197 /**
198 * i40evf_misc_irq_enable - Enable default interrupt generation settings
199 * @adapter: board private structure
200 **/
201 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
202 {
203 struct i40e_hw *hw = &adapter->hw;
204
205 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
206 I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
207 wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA_ADMINQ_MASK);
208
209 /* read flush */
210 rd32(hw, I40E_VFGEN_RSTAT);
211 }
212
213 /**
214 * i40evf_irq_disable - Mask off interrupt generation on the NIC
215 * @adapter: board private structure
216 **/
217 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
218 {
219 int i;
220 struct i40e_hw *hw = &adapter->hw;
221
222 if (!adapter->msix_entries)
223 return;
224
225 for (i = 1; i < adapter->num_msix_vectors; i++) {
226 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
227 synchronize_irq(adapter->msix_entries[i].vector);
228 }
229 /* read flush */
230 rd32(hw, I40E_VFGEN_RSTAT);
231 }
232
233 /**
234 * i40evf_irq_enable_queues - Enable interrupt for specified queues
235 * @adapter: board private structure
236 * @mask: bitmap of queues to enable
237 **/
238 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
239 {
240 struct i40e_hw *hw = &adapter->hw;
241 int i;
242
243 for (i = 1; i < adapter->num_msix_vectors; i++) {
244 if (mask & (1 << (i - 1))) {
245 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
246 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
247 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
248 }
249 }
250 }
251
252 /**
253 * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
254 * @adapter: board private structure
255 * @mask: bitmap of vectors to trigger
256 **/
257 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, 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->num_active_queues;
401 int txr_remaining = adapter->num_active_queues;
402 int i, j;
403 int rqpv, tqpv;
404 int err = 0;
405
406 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
407
408 /* The ideal configuration...
409 * We have enough vectors to map one per queue.
410 */
411 if (q_vectors == (rxr_remaining * 2)) {
412 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
413 i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
414
415 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
416 i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
417 goto out;
418 }
419
420 /* If we don't have enough vectors for a 1-to-1
421 * mapping, we'll have to group them so there are
422 * multiple queues per vector.
423 * Re-adjusting *qpv takes care of the remainder.
424 */
425 for (i = v_start; i < q_vectors; i++) {
426 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
427 for (j = 0; j < rqpv; j++) {
428 i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
429 rxr_idx++;
430 rxr_remaining--;
431 }
432 }
433 for (i = v_start; i < q_vectors; i++) {
434 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
435 for (j = 0; j < tqpv; j++) {
436 i40evf_map_vector_to_txq(adapter, i, txr_idx);
437 txr_idx++;
438 txr_remaining--;
439 }
440 }
441
442 out:
443 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
444
445 return err;
446 }
447
448 /**
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
555 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
556
557 for (i = 0; i < q_vectors; i++) {
558 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
559 NULL);
560 free_irq(adapter->msix_entries[i+1].vector,
561 adapter->q_vector[i]);
562 }
563 }
564
565 /**
566 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
567 * @adapter: board private structure
568 *
569 * Frees MSI-X vector 0.
570 **/
571 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
572 {
573 struct net_device *netdev = adapter->netdev;
574
575 free_irq(adapter->msix_entries[0].vector, netdev);
576 }
577
578 /**
579 * i40evf_configure_tx - Configure Transmit Unit after Reset
580 * @adapter: board private structure
581 *
582 * Configure the Tx unit of the MAC after a reset.
583 **/
584 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
585 {
586 struct i40e_hw *hw = &adapter->hw;
587 int i;
588
589 for (i = 0; i < adapter->num_active_queues; i++)
590 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
591 }
592
593 /**
594 * i40evf_configure_rx - Configure Receive Unit after Reset
595 * @adapter: board private structure
596 *
597 * Configure the Rx unit of the MAC after a reset.
598 **/
599 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
600 {
601 struct i40e_hw *hw = &adapter->hw;
602 struct net_device *netdev = adapter->netdev;
603 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
604 int i;
605 int rx_buf_len;
606
607
608 adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
609 adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
610
611 /* Decide whether to use packet split mode or not */
612 if (netdev->mtu > ETH_DATA_LEN) {
613 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
614 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
615 else
616 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
617 } else {
618 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
619 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
620 else
621 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
622 }
623
624 /* Set the RX buffer length according to the mode */
625 if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
626 rx_buf_len = I40E_RX_HDR_SIZE;
627 } else {
628 if (netdev->mtu <= ETH_DATA_LEN)
629 rx_buf_len = I40EVF_RXBUFFER_2048;
630 else
631 rx_buf_len = ALIGN(max_frame, 1024);
632 }
633
634 for (i = 0; i < adapter->num_active_queues; i++) {
635 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
636 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
637 }
638 }
639
640 /**
641 * i40evf_find_vlan - Search filter list for specific vlan filter
642 * @adapter: board private structure
643 * @vlan: vlan tag
644 *
645 * Returns ptr to the filter object or NULL
646 **/
647 static struct
648 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
649 {
650 struct i40evf_vlan_filter *f;
651
652 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
653 if (vlan == f->vlan)
654 return f;
655 }
656 return NULL;
657 }
658
659 /**
660 * i40evf_add_vlan - Add a vlan filter to the list
661 * @adapter: board private structure
662 * @vlan: VLAN tag
663 *
664 * Returns ptr to the filter object or NULL when no memory available.
665 **/
666 static struct
667 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
668 {
669 struct i40evf_vlan_filter *f;
670
671 f = i40evf_find_vlan(adapter, vlan);
672 if (!f) {
673 f = kzalloc(sizeof(*f), GFP_ATOMIC);
674 if (!f)
675 return NULL;
676
677 f->vlan = vlan;
678
679 INIT_LIST_HEAD(&f->list);
680 list_add(&f->list, &adapter->vlan_filter_list);
681 f->add = true;
682 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
683 }
684
685 return f;
686 }
687
688 /**
689 * i40evf_del_vlan - Remove a vlan filter from the list
690 * @adapter: board private structure
691 * @vlan: VLAN tag
692 **/
693 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
694 {
695 struct i40evf_vlan_filter *f;
696
697 f = i40evf_find_vlan(adapter, vlan);
698 if (f) {
699 f->remove = true;
700 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
701 }
702 }
703
704 /**
705 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
706 * @netdev: network device struct
707 * @vid: VLAN tag
708 **/
709 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
710 __always_unused __be16 proto, u16 vid)
711 {
712 struct i40evf_adapter *adapter = netdev_priv(netdev);
713
714 if (i40evf_add_vlan(adapter, vid) == NULL)
715 return -ENOMEM;
716 return 0;
717 }
718
719 /**
720 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
721 * @netdev: network device struct
722 * @vid: VLAN tag
723 **/
724 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
725 __always_unused __be16 proto, u16 vid)
726 {
727 struct i40evf_adapter *adapter = netdev_priv(netdev);
728
729 i40evf_del_vlan(adapter, vid);
730 return 0;
731 }
732
733 /**
734 * i40evf_find_filter - Search filter list for specific mac filter
735 * @adapter: board private structure
736 * @macaddr: the MAC address
737 *
738 * Returns ptr to the filter object or NULL
739 **/
740 static struct
741 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
742 u8 *macaddr)
743 {
744 struct i40evf_mac_filter *f;
745
746 if (!macaddr)
747 return NULL;
748
749 list_for_each_entry(f, &adapter->mac_filter_list, list) {
750 if (ether_addr_equal(macaddr, f->macaddr))
751 return f;
752 }
753 return NULL;
754 }
755
756 /**
757 * i40e_add_filter - Add a mac filter to the filter list
758 * @adapter: board private structure
759 * @macaddr: the MAC address
760 *
761 * Returns ptr to the filter object or NULL when no memory available.
762 **/
763 static struct
764 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
765 u8 *macaddr)
766 {
767 struct i40evf_mac_filter *f;
768
769 if (!macaddr)
770 return NULL;
771
772 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
773 &adapter->crit_section))
774 udelay(1);
775
776 f = i40evf_find_filter(adapter, macaddr);
777 if (!f) {
778 f = kzalloc(sizeof(*f), GFP_ATOMIC);
779 if (!f) {
780 clear_bit(__I40EVF_IN_CRITICAL_TASK,
781 &adapter->crit_section);
782 return NULL;
783 }
784
785 ether_addr_copy(f->macaddr, macaddr);
786
787 list_add(&f->list, &adapter->mac_filter_list);
788 f->add = true;
789 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
790 }
791
792 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
793 return f;
794 }
795
796 /**
797 * i40evf_set_mac - NDO callback to set port mac address
798 * @netdev: network interface device structure
799 * @p: pointer to an address structure
800 *
801 * Returns 0 on success, negative on failure
802 **/
803 static int i40evf_set_mac(struct net_device *netdev, void *p)
804 {
805 struct i40evf_adapter *adapter = netdev_priv(netdev);
806 struct i40e_hw *hw = &adapter->hw;
807 struct i40evf_mac_filter *f;
808 struct sockaddr *addr = p;
809
810 if (!is_valid_ether_addr(addr->sa_data))
811 return -EADDRNOTAVAIL;
812
813 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
814 return 0;
815
816 f = i40evf_add_filter(adapter, addr->sa_data);
817 if (f) {
818 ether_addr_copy(hw->mac.addr, addr->sa_data);
819 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
820 }
821
822 return (f == NULL) ? -ENOMEM : 0;
823 }
824
825 /**
826 * i40evf_set_rx_mode - NDO callback to set the netdev filters
827 * @netdev: network interface device structure
828 **/
829 static void i40evf_set_rx_mode(struct net_device *netdev)
830 {
831 struct i40evf_adapter *adapter = netdev_priv(netdev);
832 struct i40evf_mac_filter *f, *ftmp;
833 struct netdev_hw_addr *uca;
834 struct netdev_hw_addr *mca;
835
836 /* add addr if not already in the filter list */
837 netdev_for_each_uc_addr(uca, netdev) {
838 i40evf_add_filter(adapter, uca->addr);
839 }
840 netdev_for_each_mc_addr(mca, netdev) {
841 i40evf_add_filter(adapter, mca->addr);
842 }
843
844 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
845 &adapter->crit_section))
846 udelay(1);
847 /* remove filter if not in netdev list */
848 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
849 bool found = false;
850
851 if (is_multicast_ether_addr(f->macaddr)) {
852 netdev_for_each_mc_addr(mca, netdev) {
853 if (ether_addr_equal(mca->addr, f->macaddr)) {
854 found = true;
855 break;
856 }
857 }
858 } else {
859 netdev_for_each_uc_addr(uca, netdev) {
860 if (ether_addr_equal(uca->addr, f->macaddr)) {
861 found = true;
862 break;
863 }
864 }
865 }
866 if (found) {
867 f->remove = true;
868 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
869 }
870 }
871 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
872 }
873
874 /**
875 * i40evf_napi_enable_all - enable NAPI on all queue vectors
876 * @adapter: board private structure
877 **/
878 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
879 {
880 int q_idx;
881 struct i40e_q_vector *q_vector;
882 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
883
884 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
885 struct napi_struct *napi;
886
887 q_vector = adapter->q_vector[q_idx];
888 napi = &q_vector->napi;
889 napi_enable(napi);
890 }
891 }
892
893 /**
894 * i40evf_napi_disable_all - disable NAPI on all queue vectors
895 * @adapter: board private structure
896 **/
897 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
898 {
899 int q_idx;
900 struct i40e_q_vector *q_vector;
901 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
902
903 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
904 q_vector = adapter->q_vector[q_idx];
905 napi_disable(&q_vector->napi);
906 }
907 }
908
909 /**
910 * i40evf_configure - set up transmit and receive data structures
911 * @adapter: board private structure
912 **/
913 static void i40evf_configure(struct i40evf_adapter *adapter)
914 {
915 struct net_device *netdev = adapter->netdev;
916 int i;
917
918 i40evf_set_rx_mode(netdev);
919
920 i40evf_configure_tx(adapter);
921 i40evf_configure_rx(adapter);
922 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
923
924 for (i = 0; i < adapter->num_active_queues; i++) {
925 struct i40e_ring *ring = adapter->rx_rings[i];
926
927 i40evf_alloc_rx_buffers(ring, ring->count);
928 ring->next_to_use = ring->count - 1;
929 writel(ring->next_to_use, ring->tail);
930 }
931 }
932
933 /**
934 * i40evf_up_complete - Finish the last steps of bringing up a connection
935 * @adapter: board private structure
936 **/
937 static int i40evf_up_complete(struct i40evf_adapter *adapter)
938 {
939 adapter->state = __I40EVF_RUNNING;
940 clear_bit(__I40E_DOWN, &adapter->vsi.state);
941
942 i40evf_napi_enable_all(adapter);
943
944 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
945 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
946 return 0;
947 }
948
949 /**
950 * i40evf_clean_all_rx_rings - Free Rx Buffers for all queues
951 * @adapter: board private structure
952 **/
953 static void i40evf_clean_all_rx_rings(struct i40evf_adapter *adapter)
954 {
955 int i;
956
957 for (i = 0; i < adapter->num_active_queues; i++)
958 i40evf_clean_rx_ring(adapter->rx_rings[i]);
959 }
960
961 /**
962 * i40evf_clean_all_tx_rings - Free Tx Buffers for all queues
963 * @adapter: board private structure
964 **/
965 static void i40evf_clean_all_tx_rings(struct i40evf_adapter *adapter)
966 {
967 int i;
968
969 for (i = 0; i < adapter->num_active_queues; i++)
970 i40evf_clean_tx_ring(adapter->tx_rings[i]);
971 }
972
973 /**
974 * i40e_down - Shutdown the connection processing
975 * @adapter: board private structure
976 **/
977 void i40evf_down(struct i40evf_adapter *adapter)
978 {
979 struct net_device *netdev = adapter->netdev;
980 struct i40evf_mac_filter *f;
981
982 if (adapter->state == __I40EVF_DOWN)
983 return;
984
985 /* remove all MAC filters */
986 list_for_each_entry(f, &adapter->mac_filter_list, list) {
987 f->remove = true;
988 }
989 /* remove all VLAN filters */
990 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
991 f->remove = true;
992 }
993 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
994 adapter->state != __I40EVF_RESETTING) {
995 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
996 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
997 /* disable receives */
998 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
999 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
1000 msleep(20);
1001 }
1002 netif_tx_disable(netdev);
1003
1004 netif_tx_stop_all_queues(netdev);
1005
1006 i40evf_irq_disable(adapter);
1007
1008 i40evf_napi_disable_all(adapter);
1009
1010 netif_carrier_off(netdev);
1011
1012 i40evf_clean_all_tx_rings(adapter);
1013 i40evf_clean_all_rx_rings(adapter);
1014 }
1015
1016 /**
1017 * i40evf_acquire_msix_vectors - Setup the MSIX capability
1018 * @adapter: board private structure
1019 * @vectors: number of vectors to request
1020 *
1021 * Work with the OS to set up the MSIX vectors needed.
1022 *
1023 * Returns 0 on success, negative on failure
1024 **/
1025 static int
1026 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1027 {
1028 int err, vector_threshold;
1029
1030 /* We'll want at least 3 (vector_threshold):
1031 * 0) Other (Admin Queue and link, mostly)
1032 * 1) TxQ[0] Cleanup
1033 * 2) RxQ[0] Cleanup
1034 */
1035 vector_threshold = MIN_MSIX_COUNT;
1036
1037 /* The more we get, the more we will assign to Tx/Rx Cleanup
1038 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1039 * Right now, we simply care about how many we'll get; we'll
1040 * set them up later while requesting irq's.
1041 */
1042 err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1043 vector_threshold, vectors);
1044 if (err < 0) {
1045 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1046 kfree(adapter->msix_entries);
1047 adapter->msix_entries = NULL;
1048 return err;
1049 }
1050
1051 /* Adjust for only the vectors we'll use, which is minimum
1052 * of max_msix_q_vectors + NONQ_VECS, or the number of
1053 * vectors we were allocated.
1054 */
1055 adapter->num_msix_vectors = err;
1056 return 0;
1057 }
1058
1059 /**
1060 * i40evf_free_queues - Free memory for all rings
1061 * @adapter: board private structure to initialize
1062 *
1063 * Free all of the memory associated with queue pairs.
1064 **/
1065 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1066 {
1067 int i;
1068
1069 if (!adapter->vsi_res)
1070 return;
1071 for (i = 0; i < adapter->num_active_queues; i++) {
1072 if (adapter->tx_rings[i])
1073 kfree_rcu(adapter->tx_rings[i], rcu);
1074 adapter->tx_rings[i] = NULL;
1075 adapter->rx_rings[i] = NULL;
1076 }
1077 }
1078
1079 /**
1080 * i40evf_alloc_queues - Allocate memory for all rings
1081 * @adapter: board private structure to initialize
1082 *
1083 * We allocate one ring per queue at run-time since we don't know the
1084 * number of queues at compile-time. The polling_netdev array is
1085 * intended for Multiqueue, but should work fine with a single queue.
1086 **/
1087 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1088 {
1089 int i;
1090
1091 for (i = 0; i < adapter->num_active_queues; i++) {
1092 struct i40e_ring *tx_ring;
1093 struct i40e_ring *rx_ring;
1094
1095 tx_ring = kzalloc(sizeof(*tx_ring) * 2, GFP_KERNEL);
1096 if (!tx_ring)
1097 goto err_out;
1098
1099 tx_ring->queue_index = i;
1100 tx_ring->netdev = adapter->netdev;
1101 tx_ring->dev = &adapter->pdev->dev;
1102 tx_ring->count = adapter->tx_desc_count;
1103 adapter->tx_rings[i] = tx_ring;
1104
1105 rx_ring = &tx_ring[1];
1106 rx_ring->queue_index = i;
1107 rx_ring->netdev = adapter->netdev;
1108 rx_ring->dev = &adapter->pdev->dev;
1109 rx_ring->count = adapter->rx_desc_count;
1110 adapter->rx_rings[i] = rx_ring;
1111 }
1112
1113 return 0;
1114
1115 err_out:
1116 i40evf_free_queues(adapter);
1117 return -ENOMEM;
1118 }
1119
1120 /**
1121 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1122 * @adapter: board private structure to initialize
1123 *
1124 * Attempt to configure the interrupts using the best available
1125 * capabilities of the hardware and the kernel.
1126 **/
1127 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1128 {
1129 int vector, v_budget;
1130 int pairs = 0;
1131 int err = 0;
1132
1133 if (!adapter->vsi_res) {
1134 err = -EIO;
1135 goto out;
1136 }
1137 pairs = adapter->num_active_queues;
1138
1139 /* It's easy to be greedy for MSI-X vectors, but it really
1140 * doesn't do us much good if we have a lot more vectors
1141 * than CPU's. So let's be conservative and only ask for
1142 * (roughly) twice the number of vectors as there are CPU's.
1143 */
1144 v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1145 v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1146
1147 adapter->msix_entries = kcalloc(v_budget,
1148 sizeof(struct msix_entry), GFP_KERNEL);
1149 if (!adapter->msix_entries) {
1150 err = -ENOMEM;
1151 goto out;
1152 }
1153
1154 for (vector = 0; vector < v_budget; vector++)
1155 adapter->msix_entries[vector].entry = vector;
1156
1157 i40evf_acquire_msix_vectors(adapter, v_budget);
1158
1159 out:
1160 adapter->netdev->real_num_tx_queues = pairs;
1161 return err;
1162 }
1163
1164 /**
1165 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1166 * @adapter: board private structure to initialize
1167 *
1168 * We allocate one q_vector per queue interrupt. If allocation fails we
1169 * return -ENOMEM.
1170 **/
1171 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1172 {
1173 int q_idx, num_q_vectors;
1174 struct i40e_q_vector *q_vector;
1175
1176 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1177
1178 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1179 q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL);
1180 if (!q_vector)
1181 goto err_out;
1182 q_vector->adapter = adapter;
1183 q_vector->vsi = &adapter->vsi;
1184 q_vector->v_idx = q_idx;
1185 netif_napi_add(adapter->netdev, &q_vector->napi,
1186 i40evf_napi_poll, NAPI_POLL_WEIGHT);
1187 adapter->q_vector[q_idx] = q_vector;
1188 }
1189
1190 return 0;
1191
1192 err_out:
1193 while (q_idx) {
1194 q_idx--;
1195 q_vector = adapter->q_vector[q_idx];
1196 netif_napi_del(&q_vector->napi);
1197 kfree(q_vector);
1198 adapter->q_vector[q_idx] = NULL;
1199 }
1200 return -ENOMEM;
1201 }
1202
1203 /**
1204 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1205 * @adapter: board private structure to initialize
1206 *
1207 * This function frees the memory allocated to the q_vectors. In addition if
1208 * NAPI is enabled it will delete any references to the NAPI struct prior
1209 * to freeing the q_vector.
1210 **/
1211 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1212 {
1213 int q_idx, num_q_vectors;
1214 int napi_vectors;
1215
1216 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1217 napi_vectors = adapter->num_active_queues;
1218
1219 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1220 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1221
1222 adapter->q_vector[q_idx] = NULL;
1223 if (q_idx < napi_vectors)
1224 netif_napi_del(&q_vector->napi);
1225 kfree(q_vector);
1226 }
1227 }
1228
1229 /**
1230 * i40evf_reset_interrupt_capability - Reset MSIX setup
1231 * @adapter: board private structure
1232 *
1233 **/
1234 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1235 {
1236 pci_disable_msix(adapter->pdev);
1237 kfree(adapter->msix_entries);
1238 adapter->msix_entries = NULL;
1239 }
1240
1241 /**
1242 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1243 * @adapter: board private structure to initialize
1244 *
1245 **/
1246 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1247 {
1248 int err;
1249
1250 err = i40evf_set_interrupt_capability(adapter);
1251 if (err) {
1252 dev_err(&adapter->pdev->dev,
1253 "Unable to setup interrupt capabilities\n");
1254 goto err_set_interrupt;
1255 }
1256
1257 err = i40evf_alloc_q_vectors(adapter);
1258 if (err) {
1259 dev_err(&adapter->pdev->dev,
1260 "Unable to allocate memory for queue vectors\n");
1261 goto err_alloc_q_vectors;
1262 }
1263
1264 err = i40evf_alloc_queues(adapter);
1265 if (err) {
1266 dev_err(&adapter->pdev->dev,
1267 "Unable to allocate memory for queues\n");
1268 goto err_alloc_queues;
1269 }
1270
1271 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1272 (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1273 adapter->num_active_queues);
1274
1275 return 0;
1276 err_alloc_queues:
1277 i40evf_free_q_vectors(adapter);
1278 err_alloc_q_vectors:
1279 i40evf_reset_interrupt_capability(adapter);
1280 err_set_interrupt:
1281 return err;
1282 }
1283
1284 /**
1285 * i40evf_watchdog_timer - Periodic call-back timer
1286 * @data: pointer to adapter disguised as unsigned long
1287 **/
1288 static void i40evf_watchdog_timer(unsigned long data)
1289 {
1290 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1291
1292 schedule_work(&adapter->watchdog_task);
1293 /* timer will be rescheduled in watchdog task */
1294 }
1295
1296 /**
1297 * i40evf_watchdog_task - Periodic call-back task
1298 * @work: pointer to work_struct
1299 **/
1300 static void i40evf_watchdog_task(struct work_struct *work)
1301 {
1302 struct i40evf_adapter *adapter = container_of(work,
1303 struct i40evf_adapter,
1304 watchdog_task);
1305 struct i40e_hw *hw = &adapter->hw;
1306 uint32_t rstat_val;
1307
1308 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1309 goto restart_watchdog;
1310
1311 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1312 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1313 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1314 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1315 (rstat_val == I40E_VFR_COMPLETED)) {
1316 /* A chance for redemption! */
1317 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1318 adapter->state = __I40EVF_STARTUP;
1319 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1320 schedule_delayed_work(&adapter->init_task, 10);
1321 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1322 &adapter->crit_section);
1323 /* Don't reschedule the watchdog, since we've restarted
1324 * the init task. When init_task contacts the PF and
1325 * gets everything set up again, it'll restart the
1326 * watchdog for us. Down, boy. Sit. Stay. Woof.
1327 */
1328 return;
1329 }
1330 adapter->aq_pending = 0;
1331 adapter->aq_required = 0;
1332 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1333 goto watchdog_done;
1334 }
1335
1336 if ((adapter->state < __I40EVF_DOWN) ||
1337 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1338 goto watchdog_done;
1339
1340 /* check for reset */
1341 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1342 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1343 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
1344 (rstat_val != I40E_VFR_VFACTIVE) &&
1345 (rstat_val != I40E_VFR_COMPLETED)) {
1346 adapter->state = __I40EVF_RESETTING;
1347 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1348 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1349 schedule_work(&adapter->reset_task);
1350 adapter->aq_pending = 0;
1351 adapter->aq_required = 0;
1352 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1353 goto watchdog_done;
1354 }
1355
1356 /* Process admin queue tasks. After init, everything gets done
1357 * here so we don't race on the admin queue.
1358 */
1359 if (adapter->aq_pending)
1360 goto watchdog_done;
1361
1362 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1363 i40evf_map_queues(adapter);
1364 goto watchdog_done;
1365 }
1366
1367 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1368 i40evf_add_ether_addrs(adapter);
1369 goto watchdog_done;
1370 }
1371
1372 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1373 i40evf_add_vlans(adapter);
1374 goto watchdog_done;
1375 }
1376
1377 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1378 i40evf_del_ether_addrs(adapter);
1379 goto watchdog_done;
1380 }
1381
1382 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1383 i40evf_del_vlans(adapter);
1384 goto watchdog_done;
1385 }
1386
1387 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1388 i40evf_disable_queues(adapter);
1389 goto watchdog_done;
1390 }
1391
1392 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1393 i40evf_configure_queues(adapter);
1394 goto watchdog_done;
1395 }
1396
1397 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1398 i40evf_enable_queues(adapter);
1399 goto watchdog_done;
1400 }
1401
1402 if (adapter->state == __I40EVF_RUNNING)
1403 i40evf_request_stats(adapter);
1404
1405 i40evf_irq_enable(adapter, true);
1406 i40evf_fire_sw_int(adapter, 0xFF);
1407
1408 watchdog_done:
1409 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1410 restart_watchdog:
1411 if (adapter->state == __I40EVF_REMOVE)
1412 return;
1413 if (adapter->aq_required)
1414 mod_timer(&adapter->watchdog_timer,
1415 jiffies + msecs_to_jiffies(20));
1416 else
1417 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1418 schedule_work(&adapter->adminq_task);
1419 }
1420
1421 /**
1422 * next_queue - increment to next available tx queue
1423 * @adapter: board private structure
1424 * @j: queue counter
1425 *
1426 * Helper function for RSS programming to increment through available
1427 * queus. Returns the next queue value.
1428 **/
1429 static int next_queue(struct i40evf_adapter *adapter, int j)
1430 {
1431 j += 1;
1432
1433 return j >= adapter->num_active_queues ? 0 : j;
1434 }
1435
1436 /**
1437 * i40evf_configure_rss - Prepare for RSS if used
1438 * @adapter: board private structure
1439 **/
1440 static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1441 {
1442 u32 rss_key[I40E_VFQF_HKEY_MAX_INDEX + 1];
1443 struct i40e_hw *hw = &adapter->hw;
1444 u32 lut = 0;
1445 int i, j;
1446 u64 hena;
1447
1448 /* No RSS for single queue. */
1449 if (adapter->num_active_queues == 1) {
1450 wr32(hw, I40E_VFQF_HENA(0), 0);
1451 wr32(hw, I40E_VFQF_HENA(1), 0);
1452 return;
1453 }
1454
1455 /* Hash type is configured by the PF - we just supply the key */
1456 netdev_rss_key_fill(rss_key, sizeof(rss_key));
1457 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1458 wr32(hw, I40E_VFQF_HKEY(i), rss_key[i]);
1459
1460 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1461 hena = I40E_DEFAULT_RSS_HENA;
1462 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1463 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1464
1465 /* Populate the LUT with max no. of queues in round robin fashion */
1466 j = adapter->num_active_queues;
1467 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
1468 j = next_queue(adapter, j);
1469 lut = j;
1470 j = next_queue(adapter, j);
1471 lut |= j << 8;
1472 j = next_queue(adapter, j);
1473 lut |= j << 16;
1474 j = next_queue(adapter, j);
1475 lut |= j << 24;
1476 wr32(hw, I40E_VFQF_HLUT(i), lut);
1477 }
1478 i40e_flush(hw);
1479 }
1480
1481 #define I40EVF_RESET_WAIT_MS 100
1482 #define I40EVF_RESET_WAIT_COUNT 200
1483 /**
1484 * i40evf_reset_task - Call-back task to handle hardware reset
1485 * @work: pointer to work_struct
1486 *
1487 * During reset we need to shut down and reinitialize the admin queue
1488 * before we can use it to communicate with the PF again. We also clear
1489 * and reinit the rings because that context is lost as well.
1490 **/
1491 static void i40evf_reset_task(struct work_struct *work)
1492 {
1493 struct i40evf_adapter *adapter = container_of(work,
1494 struct i40evf_adapter,
1495 reset_task);
1496 struct i40e_hw *hw = &adapter->hw;
1497 int i = 0, err;
1498 uint32_t rstat_val;
1499
1500 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1501 &adapter->crit_section))
1502 usleep_range(500, 1000);
1503
1504 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1505 dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
1506 i40evf_request_reset(adapter);
1507 }
1508
1509 /* poll until we see the reset actually happen */
1510 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1511 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1512 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1513 if ((rstat_val != I40E_VFR_VFACTIVE) &&
1514 (rstat_val != I40E_VFR_COMPLETED))
1515 break;
1516 else
1517 msleep(I40EVF_RESET_WAIT_MS);
1518 }
1519 if (i == I40EVF_RESET_WAIT_COUNT) {
1520 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1521 goto continue_reset; /* act like the reset happened */
1522 }
1523
1524 /* wait until the reset is complete and the PF is responding to us */
1525 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1526 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1527 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1528 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1529 (rstat_val == I40E_VFR_COMPLETED))
1530 break;
1531 else
1532 msleep(I40EVF_RESET_WAIT_MS);
1533 }
1534 if (i == I40EVF_RESET_WAIT_COUNT) {
1535 struct i40evf_mac_filter *f, *ftmp;
1536 struct i40evf_vlan_filter *fv, *fvtmp;
1537
1538 /* reset never finished */
1539 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1540 rstat_val);
1541 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1542
1543 if (netif_running(adapter->netdev)) {
1544 set_bit(__I40E_DOWN, &adapter->vsi.state);
1545 i40evf_down(adapter);
1546 i40evf_free_traffic_irqs(adapter);
1547 i40evf_free_all_tx_resources(adapter);
1548 i40evf_free_all_rx_resources(adapter);
1549 }
1550
1551 /* Delete all of the filters, both MAC and VLAN. */
1552 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1553 list) {
1554 list_del(&f->list);
1555 kfree(f);
1556 }
1557 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1558 list) {
1559 list_del(&fv->list);
1560 kfree(fv);
1561 }
1562
1563 i40evf_free_misc_irq(adapter);
1564 i40evf_reset_interrupt_capability(adapter);
1565 i40evf_free_queues(adapter);
1566 i40evf_free_q_vectors(adapter);
1567 kfree(adapter->vf_res);
1568 i40evf_shutdown_adminq(hw);
1569 adapter->netdev->flags &= ~IFF_UP;
1570 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1571 return; /* Do not attempt to reinit. It's dead, Jim. */
1572 }
1573
1574 continue_reset:
1575 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1576
1577 i40evf_down(adapter);
1578 adapter->state = __I40EVF_RESETTING;
1579
1580 /* kill and reinit the admin queue */
1581 if (i40evf_shutdown_adminq(hw))
1582 dev_warn(&adapter->pdev->dev,
1583 "%s: Failed to destroy the Admin Queue resources\n",
1584 __func__);
1585 err = i40evf_init_adminq(hw);
1586 if (err)
1587 dev_info(&adapter->pdev->dev, "%s: init_adminq failed: %d\n",
1588 __func__, err);
1589
1590 adapter->aq_pending = 0;
1591 adapter->aq_required = 0;
1592 i40evf_map_queues(adapter);
1593 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1594
1595 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1596
1597 if (netif_running(adapter->netdev)) {
1598 /* allocate transmit descriptors */
1599 err = i40evf_setup_all_tx_resources(adapter);
1600 if (err)
1601 goto reset_err;
1602
1603 /* allocate receive descriptors */
1604 err = i40evf_setup_all_rx_resources(adapter);
1605 if (err)
1606 goto reset_err;
1607
1608 i40evf_configure(adapter);
1609
1610 err = i40evf_up_complete(adapter);
1611 if (err)
1612 goto reset_err;
1613
1614 i40evf_irq_enable(adapter, true);
1615 }
1616 return;
1617 reset_err:
1618 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1619 i40evf_close(adapter->netdev);
1620 }
1621
1622 /**
1623 * i40evf_adminq_task - worker thread to clean the admin queue
1624 * @work: pointer to work_struct containing our data
1625 **/
1626 static void i40evf_adminq_task(struct work_struct *work)
1627 {
1628 struct i40evf_adapter *adapter =
1629 container_of(work, struct i40evf_adapter, adminq_task);
1630 struct i40e_hw *hw = &adapter->hw;
1631 struct i40e_arq_event_info event;
1632 struct i40e_virtchnl_msg *v_msg;
1633 i40e_status ret;
1634 u32 val, oldval;
1635 u16 pending;
1636
1637 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1638 return;
1639
1640 event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1641 event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1642 if (!event.msg_buf)
1643 return;
1644
1645 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1646 do {
1647 ret = i40evf_clean_arq_element(hw, &event, &pending);
1648 if (ret)
1649 break; /* No event to process or error cleaning ARQ */
1650
1651 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1652 v_msg->v_retval, event.msg_buf,
1653 event.msg_len);
1654 if (pending != 0)
1655 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1656 } while (pending);
1657
1658 /* check for error indications */
1659 val = rd32(hw, hw->aq.arq.len);
1660 oldval = val;
1661 if (val & I40E_VF_ARQLEN_ARQVFE_MASK) {
1662 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1663 val &= ~I40E_VF_ARQLEN_ARQVFE_MASK;
1664 }
1665 if (val & I40E_VF_ARQLEN_ARQOVFL_MASK) {
1666 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1667 val &= ~I40E_VF_ARQLEN_ARQOVFL_MASK;
1668 }
1669 if (val & I40E_VF_ARQLEN_ARQCRIT_MASK) {
1670 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1671 val &= ~I40E_VF_ARQLEN_ARQCRIT_MASK;
1672 }
1673 if (oldval != val)
1674 wr32(hw, hw->aq.arq.len, val);
1675
1676 val = rd32(hw, hw->aq.asq.len);
1677 oldval = val;
1678 if (val & I40E_VF_ATQLEN_ATQVFE_MASK) {
1679 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1680 val &= ~I40E_VF_ATQLEN_ATQVFE_MASK;
1681 }
1682 if (val & I40E_VF_ATQLEN_ATQOVFL_MASK) {
1683 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1684 val &= ~I40E_VF_ATQLEN_ATQOVFL_MASK;
1685 }
1686 if (val & I40E_VF_ATQLEN_ATQCRIT_MASK) {
1687 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1688 val &= ~I40E_VF_ATQLEN_ATQCRIT_MASK;
1689 }
1690 if (oldval != val)
1691 wr32(hw, hw->aq.asq.len, val);
1692
1693 /* re-enable Admin queue interrupt cause */
1694 i40evf_misc_irq_enable(adapter);
1695
1696 kfree(event.msg_buf);
1697 }
1698
1699 /**
1700 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1701 * @adapter: board private structure
1702 *
1703 * Free all transmit software resources
1704 **/
1705 static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1706 {
1707 int i;
1708
1709 for (i = 0; i < adapter->num_active_queues; i++)
1710 if (adapter->tx_rings[i]->desc)
1711 i40evf_free_tx_resources(adapter->tx_rings[i]);
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->num_active_queues; 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->num_active_queues; 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->num_active_queues; 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 usleep_range(10, 20);
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 (!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->num_active_queues = min_t(int,
2156 adapter->vsi_res->num_queue_pairs,
2157 (int)(num_online_cpus()));
2158 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2159 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2160 err = i40evf_init_interrupt_scheme(adapter);
2161 if (err)
2162 goto err_sw_init;
2163 i40evf_map_rings_to_vectors(adapter);
2164 i40evf_configure_rss(adapter);
2165 err = i40evf_request_misc_irq(adapter);
2166 if (err)
2167 goto err_sw_init;
2168
2169 netif_carrier_off(netdev);
2170
2171 adapter->vsi.id = adapter->vsi_res->vsi_id;
2172 adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2173 adapter->vsi.back = adapter;
2174 adapter->vsi.base_vector = 1;
2175 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2176 adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2177 ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2178 adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2179 ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2180 adapter->vsi.netdev = adapter->netdev;
2181
2182 if (!adapter->netdev_registered) {
2183 err = register_netdev(netdev);
2184 if (err)
2185 goto err_register;
2186 }
2187
2188 adapter->netdev_registered = true;
2189
2190 netif_tx_stop_all_queues(netdev);
2191
2192 dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2193 if (netdev->features & NETIF_F_GRO)
2194 dev_info(&pdev->dev, "GRO is enabled\n");
2195
2196 dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2197 adapter->state = __I40EVF_DOWN;
2198 set_bit(__I40E_DOWN, &adapter->vsi.state);
2199 i40evf_misc_irq_enable(adapter);
2200 return;
2201 restart:
2202 schedule_delayed_work(&adapter->init_task,
2203 msecs_to_jiffies(50));
2204 return;
2205
2206 err_register:
2207 i40evf_free_misc_irq(adapter);
2208 err_sw_init:
2209 i40evf_reset_interrupt_capability(adapter);
2210 err_alloc:
2211 kfree(adapter->vf_res);
2212 adapter->vf_res = NULL;
2213 err:
2214 /* Things went into the weeds, so try again later */
2215 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2216 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
2217 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2218 return; /* do not reschedule */
2219 }
2220 schedule_delayed_work(&adapter->init_task, HZ * 3);
2221 }
2222
2223 /**
2224 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2225 * @pdev: pci device structure
2226 **/
2227 static void i40evf_shutdown(struct pci_dev *pdev)
2228 {
2229 struct net_device *netdev = pci_get_drvdata(pdev);
2230
2231 netif_device_detach(netdev);
2232
2233 if (netif_running(netdev))
2234 i40evf_close(netdev);
2235
2236 #ifdef CONFIG_PM
2237 pci_save_state(pdev);
2238
2239 #endif
2240 pci_disable_device(pdev);
2241 }
2242
2243 /**
2244 * i40evf_probe - Device Initialization Routine
2245 * @pdev: PCI device information struct
2246 * @ent: entry in i40evf_pci_tbl
2247 *
2248 * Returns 0 on success, negative on failure
2249 *
2250 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2251 * The OS initialization, configuring of the adapter private structure,
2252 * and a hardware reset occur.
2253 **/
2254 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2255 {
2256 struct net_device *netdev;
2257 struct i40evf_adapter *adapter = NULL;
2258 struct i40e_hw *hw = NULL;
2259 int err;
2260
2261 err = pci_enable_device(pdev);
2262 if (err)
2263 return err;
2264
2265 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2266 if (err) {
2267 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2268 if (err) {
2269 dev_err(&pdev->dev,
2270 "DMA configuration failed: 0x%x\n", err);
2271 goto err_dma;
2272 }
2273 }
2274
2275 err = pci_request_regions(pdev, i40evf_driver_name);
2276 if (err) {
2277 dev_err(&pdev->dev,
2278 "pci_request_regions failed 0x%x\n", err);
2279 goto err_pci_reg;
2280 }
2281
2282 pci_enable_pcie_error_reporting(pdev);
2283
2284 pci_set_master(pdev);
2285
2286 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2287 MAX_TX_QUEUES);
2288 if (!netdev) {
2289 err = -ENOMEM;
2290 goto err_alloc_etherdev;
2291 }
2292
2293 SET_NETDEV_DEV(netdev, &pdev->dev);
2294
2295 pci_set_drvdata(pdev, netdev);
2296 adapter = netdev_priv(netdev);
2297
2298 adapter->netdev = netdev;
2299 adapter->pdev = pdev;
2300
2301 hw = &adapter->hw;
2302 hw->back = adapter;
2303
2304 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2305 adapter->state = __I40EVF_STARTUP;
2306
2307 /* Call save state here because it relies on the adapter struct. */
2308 pci_save_state(pdev);
2309
2310 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2311 pci_resource_len(pdev, 0));
2312 if (!hw->hw_addr) {
2313 err = -EIO;
2314 goto err_ioremap;
2315 }
2316 hw->vendor_id = pdev->vendor;
2317 hw->device_id = pdev->device;
2318 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2319 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2320 hw->subsystem_device_id = pdev->subsystem_device;
2321 hw->bus.device = PCI_SLOT(pdev->devfn);
2322 hw->bus.func = PCI_FUNC(pdev->devfn);
2323
2324 INIT_LIST_HEAD(&adapter->mac_filter_list);
2325 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2326
2327 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2328 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2329 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2330 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2331 schedule_delayed_work(&adapter->init_task, 10);
2332
2333 return 0;
2334
2335 err_ioremap:
2336 free_netdev(netdev);
2337 err_alloc_etherdev:
2338 pci_release_regions(pdev);
2339 err_pci_reg:
2340 err_dma:
2341 pci_disable_device(pdev);
2342 return err;
2343 }
2344
2345 #ifdef CONFIG_PM
2346 /**
2347 * i40evf_suspend - Power management suspend routine
2348 * @pdev: PCI device information struct
2349 * @state: unused
2350 *
2351 * Called when the system (VM) is entering sleep/suspend.
2352 **/
2353 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2354 {
2355 struct net_device *netdev = pci_get_drvdata(pdev);
2356 struct i40evf_adapter *adapter = netdev_priv(netdev);
2357 int retval = 0;
2358
2359 netif_device_detach(netdev);
2360
2361 if (netif_running(netdev)) {
2362 rtnl_lock();
2363 i40evf_down(adapter);
2364 rtnl_unlock();
2365 }
2366 i40evf_free_misc_irq(adapter);
2367 i40evf_reset_interrupt_capability(adapter);
2368
2369 retval = pci_save_state(pdev);
2370 if (retval)
2371 return retval;
2372
2373 pci_disable_device(pdev);
2374
2375 return 0;
2376 }
2377
2378 /**
2379 * i40evf_resume - Power managment resume routine
2380 * @pdev: PCI device information struct
2381 *
2382 * Called when the system (VM) is resumed from sleep/suspend.
2383 **/
2384 static int i40evf_resume(struct pci_dev *pdev)
2385 {
2386 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2387 struct net_device *netdev = adapter->netdev;
2388 u32 err;
2389
2390 pci_set_power_state(pdev, PCI_D0);
2391 pci_restore_state(pdev);
2392 /* pci_restore_state clears dev->state_saved so call
2393 * pci_save_state to restore it.
2394 */
2395 pci_save_state(pdev);
2396
2397 err = pci_enable_device_mem(pdev);
2398 if (err) {
2399 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2400 return err;
2401 }
2402 pci_set_master(pdev);
2403
2404 rtnl_lock();
2405 err = i40evf_set_interrupt_capability(adapter);
2406 if (err) {
2407 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2408 return err;
2409 }
2410 err = i40evf_request_misc_irq(adapter);
2411 rtnl_unlock();
2412 if (err) {
2413 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2414 return err;
2415 }
2416
2417 schedule_work(&adapter->reset_task);
2418
2419 netif_device_attach(netdev);
2420
2421 return err;
2422 }
2423
2424 #endif /* CONFIG_PM */
2425 /**
2426 * i40evf_remove - Device Removal Routine
2427 * @pdev: PCI device information struct
2428 *
2429 * i40evf_remove is called by the PCI subsystem to alert the driver
2430 * that it should release a PCI device. The could be caused by a
2431 * Hot-Plug event, or because the driver is going to be removed from
2432 * memory.
2433 **/
2434 static void i40evf_remove(struct pci_dev *pdev)
2435 {
2436 struct net_device *netdev = pci_get_drvdata(pdev);
2437 struct i40evf_adapter *adapter = netdev_priv(netdev);
2438 struct i40evf_mac_filter *f, *ftmp;
2439 struct i40e_hw *hw = &adapter->hw;
2440
2441 cancel_delayed_work_sync(&adapter->init_task);
2442 cancel_work_sync(&adapter->reset_task);
2443
2444 if (adapter->netdev_registered) {
2445 unregister_netdev(netdev);
2446 adapter->netdev_registered = false;
2447 }
2448 adapter->state = __I40EVF_REMOVE;
2449
2450 if (adapter->msix_entries) {
2451 i40evf_misc_irq_disable(adapter);
2452 i40evf_free_misc_irq(adapter);
2453 i40evf_reset_interrupt_capability(adapter);
2454 i40evf_free_q_vectors(adapter);
2455 }
2456
2457 if (adapter->watchdog_timer.function)
2458 del_timer_sync(&adapter->watchdog_timer);
2459
2460 flush_scheduled_work();
2461
2462 if (hw->aq.asq.count)
2463 i40evf_shutdown_adminq(hw);
2464
2465 iounmap(hw->hw_addr);
2466 pci_release_regions(pdev);
2467
2468 i40evf_free_queues(adapter);
2469 kfree(adapter->vf_res);
2470 /* If we got removed before an up/down sequence, we've got a filter
2471 * hanging out there that we need to get rid of.
2472 */
2473 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2474 list_del(&f->list);
2475 kfree(f);
2476 }
2477
2478 free_netdev(netdev);
2479
2480 pci_disable_pcie_error_reporting(pdev);
2481
2482 pci_disable_device(pdev);
2483 }
2484
2485 static struct pci_driver i40evf_driver = {
2486 .name = i40evf_driver_name,
2487 .id_table = i40evf_pci_tbl,
2488 .probe = i40evf_probe,
2489 .remove = i40evf_remove,
2490 #ifdef CONFIG_PM
2491 .suspend = i40evf_suspend,
2492 .resume = i40evf_resume,
2493 #endif
2494 .shutdown = i40evf_shutdown,
2495 };
2496
2497 /**
2498 * i40e_init_module - Driver Registration Routine
2499 *
2500 * i40e_init_module is the first routine called when the driver is
2501 * loaded. All it does is register with the PCI subsystem.
2502 **/
2503 static int __init i40evf_init_module(void)
2504 {
2505 int ret;
2506
2507 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2508 i40evf_driver_version);
2509
2510 pr_info("%s\n", i40evf_copyright);
2511
2512 ret = pci_register_driver(&i40evf_driver);
2513 return ret;
2514 }
2515
2516 module_init(i40evf_init_module);
2517
2518 /**
2519 * i40e_exit_module - Driver Exit Cleanup Routine
2520 *
2521 * i40e_exit_module is called just before the driver is removed
2522 * from memory.
2523 **/
2524 static void __exit i40evf_exit_module(void)
2525 {
2526 pci_unregister_driver(&i40evf_driver);
2527 }
2528
2529 module_exit(i40evf_exit_module);
2530
2531 /* i40evf_main.c */
Linux kernel - Deliverables
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