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i40evf: change type of flags variable
[deliverable/linux.git] / drivers / net / ethernet / intel / i40evf / i40evf_main.c
CommitLineData
5eae00c5
GR		 1/*******************************************************************************
2 *
3 * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
e1dfee8e 4 * Copyright(c) 2013 - 2014 Intel Corporation.
5eae00c5
GR		 5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * The full GNU General Public License is included in this distribution in
16 * the file called "COPYING".
17 *
18 * Contact Information:
19 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
20 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
21 *
22 ******************************************************************************/
23
24#include "i40evf.h"
25#include "i40e_prototype.h"
26static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter);
27static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter);
28static int i40evf_close(struct net_device *netdev);
29
30char i40evf_driver_name[] = "i40evf";
31static const char i40evf_driver_string[] =
32 "Intel(R) XL710 X710 Virtual Function Network Driver";
33
34#define DRV_VERSION "0.9.11"
35const char i40evf_driver_version[] = DRV_VERSION;
36static const char i40evf_copyright[] =
37 "Copyright (c) 2013 Intel Corporation.";
38
39/* i40evf_pci_tbl - PCI Device ID Table
40 *
41 * Wildcard entries (PCI_ANY_ID) should come last
42 * Last entry must be all 0s
43 *
44 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
45 * Class, Class Mask, private data (not used) }
46 */
47static DEFINE_PCI_DEVICE_TABLE(i40evf_pci_tbl) = {
ab60085e 48 {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
5eae00c5
GR		 49 /* required last entry */
50 {0, }
51};
52
53MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
54
55MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
56MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
57MODULE_LICENSE("GPL");
58MODULE_VERSION(DRV_VERSION);
59
60/**
61 * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
62 * @hw: pointer to the HW structure
63 * @mem: ptr to mem struct to fill out
64 * @size: size of memory requested
65 * @alignment: what to align the allocation to
66 **/
67i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
68 struct i40e_dma_mem *mem,
69 u64 size, u32 alignment)
70{
71 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
72
73 if (!mem)
74 return I40E_ERR_PARAM;
75
76 mem->size = ALIGN(size, alignment);
77 mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
78 (dma_addr_t *)&mem->pa, GFP_KERNEL);
79 if (mem->va)
80 return 0;
81 else
82 return I40E_ERR_NO_MEMORY;
83}
84
85/**
86 * i40evf_free_dma_mem_d - OS specific memory free for shared code
87 * @hw: pointer to the HW structure
88 * @mem: ptr to mem struct to free
89 **/
90i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
91{
92 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
93
94 if (!mem || !mem->va)
95 return I40E_ERR_PARAM;
96 dma_free_coherent(&adapter->pdev->dev, mem->size,
97 mem->va, (dma_addr_t)mem->pa);
98 return 0;
99}
100
101/**
102 * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
103 * @hw: pointer to the HW structure
104 * @mem: ptr to mem struct to fill out
105 * @size: size of memory requested
106 **/
107i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
108 struct i40e_virt_mem *mem, u32 size)
109{
110 if (!mem)
111 return I40E_ERR_PARAM;
112
113 mem->size = size;
114 mem->va = kzalloc(size, GFP_KERNEL);
115
116 if (mem->va)
117 return 0;
118 else
119 return I40E_ERR_NO_MEMORY;
120}
121
122/**
123 * i40evf_free_virt_mem_d - OS specific memory free for shared code
124 * @hw: pointer to the HW structure
125 * @mem: ptr to mem struct to free
126 **/
127i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
128 struct i40e_virt_mem *mem)
129{
130 if (!mem)
131 return I40E_ERR_PARAM;
132
133 /* it's ok to kfree a NULL pointer */
134 kfree(mem->va);
135
136 return 0;
137}
138
139/**
140 * i40evf_debug_d - OS dependent version of debug printing
141 * @hw: pointer to the HW structure
142 * @mask: debug level mask
143 * @fmt_str: printf-type format description
144 **/
145void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
146{
147 char buf[512];
148 va_list argptr;
149
150 if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
151 return;
152
153 va_start(argptr, fmt_str);
154 vsnprintf(buf, sizeof(buf), fmt_str, argptr);
155 va_end(argptr);
156
157 /* the debug string is already formatted with a newline */
158 pr_info("%s", buf);
159}
160
161/**
162 * i40evf_tx_timeout - Respond to a Tx Hang
163 * @netdev: network interface device structure
164 **/
165static void i40evf_tx_timeout(struct net_device *netdev)
166{
167 struct i40evf_adapter *adapter = netdev_priv(netdev);
168
169 adapter->tx_timeout_count++;
170
171 /* Do the reset outside of interrupt context */
172 schedule_work(&adapter->reset_task);
173}
174
175/**
176 * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
177 * @adapter: board private structure
178 **/
179static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
180{
181 struct i40e_hw *hw = &adapter->hw;
182 wr32(hw, I40E_VFINT_DYN_CTL01, 0);
183
184 /* read flush */
185 rd32(hw, I40E_VFGEN_RSTAT);
186
187 synchronize_irq(adapter->msix_entries[0].vector);
188}
189
190/**
191 * i40evf_misc_irq_enable - Enable default interrupt generation settings
192 * @adapter: board private structure
193 **/
194static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
195{
196 struct i40e_hw *hw = &adapter->hw;
197 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
198 I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
199 wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA_ADMINQ_MASK);
200
201 /* read flush */
202 rd32(hw, I40E_VFGEN_RSTAT);
203}
204
205/**
206 * i40evf_irq_disable - Mask off interrupt generation on the NIC
207 * @adapter: board private structure
208 **/
209static void i40evf_irq_disable(struct i40evf_adapter *adapter)
210{
211 int i;
212 struct i40e_hw *hw = &adapter->hw;
213
214 for (i = 1; i < adapter->num_msix_vectors; i++) {
215 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
216 synchronize_irq(adapter->msix_entries[i].vector);
217 }
218 /* read flush */
219 rd32(hw, I40E_VFGEN_RSTAT);
220
221}
222
223/**
224 * i40evf_irq_enable_queues - Enable interrupt for specified queues
225 * @adapter: board private structure
226 * @mask: bitmap of queues to enable
227 **/
228void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
229{
230 struct i40e_hw *hw = &adapter->hw;
231 int i;
232
233 for (i = 1; i < adapter->num_msix_vectors; i++) {
234 if (mask & (1 << (i - 1))) {
235 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
236 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
237 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
238 }
239 }
240}
241
242/**
243 * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
244 * @adapter: board private structure
245 * @mask: bitmap of vectors to trigger
246 **/
247static void i40evf_fire_sw_int(struct i40evf_adapter *adapter,
248 u32 mask)
249{
250 struct i40e_hw *hw = &adapter->hw;
251 int i;
252 uint32_t dyn_ctl;
253
254 for (i = 1; i < adapter->num_msix_vectors; i++) {
255 if (mask & (1 << i)) {
256 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
257 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
258 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
259 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
260 }
261 }
262}
263
264/**
265 * i40evf_irq_enable - Enable default interrupt generation settings
266 * @adapter: board private structure
267 **/
268void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
269{
270 struct i40e_hw *hw = &adapter->hw;
271
272 i40evf_irq_enable_queues(adapter, ~0);
273
274 if (flush)
275 rd32(hw, I40E_VFGEN_RSTAT);
276}
277
278/**
279 * i40evf_msix_aq - Interrupt handler for vector 0
280 * @irq: interrupt number
281 * @data: pointer to netdev
282 **/
283static irqreturn_t i40evf_msix_aq(int irq, void *data)
284{
285 struct net_device *netdev = data;
286 struct i40evf_adapter *adapter = netdev_priv(netdev);
287 struct i40e_hw *hw = &adapter->hw;
288 u32 val;
289 u32 ena_mask;
290
291 /* handle non-queue interrupts */
292 val = rd32(hw, I40E_VFINT_ICR01);
293 ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
294
295
296 val = rd32(hw, I40E_VFINT_DYN_CTL01);
297 val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
298 wr32(hw, I40E_VFINT_DYN_CTL01, val);
299
300 /* re-enable interrupt causes */
301 wr32(hw, I40E_VFINT_ICR0_ENA1, ena_mask);
302 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK);
303
304 /* schedule work on the private workqueue */
305 schedule_work(&adapter->adminq_task);
306
307 return IRQ_HANDLED;
308}
309
310/**
311 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
312 * @irq: interrupt number
313 * @data: pointer to a q_vector
314 **/
315static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
316{
317 struct i40e_q_vector *q_vector = data;
318
319 if (!q_vector->tx.ring && !q_vector->rx.ring)
320 return IRQ_HANDLED;
321
322 napi_schedule(&q_vector->napi);
323
324 return IRQ_HANDLED;
325}
326
327/**
328 * i40evf_map_vector_to_rxq - associate irqs with rx queues
329 * @adapter: board private structure
330 * @v_idx: interrupt number
331 * @r_idx: queue number
332 **/
333static void
334i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
335{
336 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
337 struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
338
339 rx_ring->q_vector = q_vector;
340 rx_ring->next = q_vector->rx.ring;
341 rx_ring->vsi = &adapter->vsi;
342 q_vector->rx.ring = rx_ring;
343 q_vector->rx.count++;
344 q_vector->rx.latency_range = I40E_LOW_LATENCY;
345}
346
347/**
348 * i40evf_map_vector_to_txq - associate irqs with tx queues
349 * @adapter: board private structure
350 * @v_idx: interrupt number
351 * @t_idx: queue number
352 **/
353static void
354i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
355{
356 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
357 struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
358
359 tx_ring->q_vector = q_vector;
360 tx_ring->next = q_vector->tx.ring;
361 tx_ring->vsi = &adapter->vsi;
362 q_vector->tx.ring = tx_ring;
363 q_vector->tx.count++;
364 q_vector->tx.latency_range = I40E_LOW_LATENCY;
365 q_vector->num_ringpairs++;
366 q_vector->ring_mask |= (1 << t_idx);
367}
368
369/**
370 * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
371 * @adapter: board private structure to initialize
372 *
373 * This function maps descriptor rings to the queue-specific vectors
374 * we were allotted through the MSI-X enabling code. Ideally, we'd have
375 * one vector per ring/queue, but on a constrained vector budget, we
376 * group the rings as "efficiently" as possible. You would add new
377 * mapping configurations in here.
378 **/
379static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
380{
381 int q_vectors;
382 int v_start = 0;
383 int rxr_idx = 0, txr_idx = 0;
384 int rxr_remaining = adapter->vsi_res->num_queue_pairs;
385 int txr_remaining = adapter->vsi_res->num_queue_pairs;
386 int i, j;
387 int rqpv, tqpv;
388 int err = 0;
389
390 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
391
392 /* The ideal configuration...
393 * We have enough vectors to map one per queue.
394 */
395 if (q_vectors == (rxr_remaining * 2)) {
396 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
397 i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
398
399 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
400 i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
401 goto out;
402 }
403
404 /* If we don't have enough vectors for a 1-to-1
405 * mapping, we'll have to group them so there are
406 * multiple queues per vector.
407 * Re-adjusting *qpv takes care of the remainder.
408 */
409 for (i = v_start; i < q_vectors; i++) {
410 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
411 for (j = 0; j < rqpv; j++) {
412 i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
413 rxr_idx++;
414 rxr_remaining--;
415 }
416 }
417 for (i = v_start; i < q_vectors; i++) {
418 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
419 for (j = 0; j < tqpv; j++) {
420 i40evf_map_vector_to_txq(adapter, i, txr_idx);
421 txr_idx++;
422 txr_remaining--;
423 }
424 }
425
426out:
427 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
428
429 return err;
430}
431
432/**
433 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
434 * @adapter: board private structure
435 *
436 * Allocates MSI-X vectors for tx and rx handling, and requests
437 * interrupts from the kernel.
438 **/
439static int
440i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
441{
442 int vector, err, q_vectors;
443 int rx_int_idx = 0, tx_int_idx = 0;
444
445 i40evf_irq_disable(adapter);
446 /* Decrement for Other and TCP Timer vectors */
447 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
448
449 for (vector = 0; vector < q_vectors; vector++) {
450 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
451
452 if (q_vector->tx.ring && q_vector->rx.ring) {
453 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
454 "i40evf-%s-%s-%d", basename,
455 "TxRx", rx_int_idx++);
456 tx_int_idx++;
457 } else if (q_vector->rx.ring) {
458 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
459 "i40evf-%s-%s-%d", basename,
460 "rx", rx_int_idx++);
461 } else if (q_vector->tx.ring) {
462 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
463 "i40evf-%s-%s-%d", basename,
464 "tx", tx_int_idx++);
465 } else {
466 /* skip this unused q_vector */
467 continue;
468 }
469 err = request_irq(
470 adapter->msix_entries[vector + NONQ_VECS].vector,
471 i40evf_msix_clean_rings,
472 0,
473 q_vector->name,
474 q_vector);
475 if (err) {
476 dev_info(&adapter->pdev->dev,
477 "%s: request_irq failed, error: %d\n",
478 __func__, err);
479 goto free_queue_irqs;
480 }
481 /* assign the mask for this irq */
482 irq_set_affinity_hint(
483 adapter->msix_entries[vector + NONQ_VECS].vector,
484 q_vector->affinity_mask);
485 }
486
487 return 0;
488
489free_queue_irqs:
490 while (vector) {
491 vector--;
492 irq_set_affinity_hint(
493 adapter->msix_entries[vector + NONQ_VECS].vector,
494 NULL);
495 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
496 adapter->q_vector[vector]);
497 }
498 return err;
499}
500
501/**
502 * i40evf_request_misc_irq - Initialize MSI-X interrupts
503 * @adapter: board private structure
504 *
505 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
506 * vector is only for the admin queue, and stays active even when the netdev
507 * is closed.
508 **/
509static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
510{
511 struct net_device *netdev = adapter->netdev;
512 int err;
513
e1dfee8e 514 sprintf(adapter->misc_vector_name, "i40evf:mbx");
5eae00c5 515 err = request_irq(adapter->msix_entries[0].vector,
e1dfee8e
MW		 516 &i40evf_msix_aq, 0,
517 adapter->misc_vector_name, netdev);
5eae00c5
GR		 518 if (err) {
519 dev_err(&adapter->pdev->dev,
520 "request_irq for msix_aq failed: %d\n", err);
521 free_irq(adapter->msix_entries[0].vector, netdev);
522 }
523 return err;
524}
525
526/**
527 * i40evf_free_traffic_irqs - Free MSI-X interrupts
528 * @adapter: board private structure
529 *
530 * Frees all MSI-X vectors other than 0.
531 **/
532static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
533{
534 int i;
535 int q_vectors;
536 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
537
538 for (i = 0; i < q_vectors; i++) {
539 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
540 NULL);
541 free_irq(adapter->msix_entries[i+1].vector,
542 adapter->q_vector[i]);
543 }
544}
545
546/**
547 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
548 * @adapter: board private structure
549 *
550 * Frees MSI-X vector 0.
551 **/
552static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
553{
554 struct net_device *netdev = adapter->netdev;
555
556 free_irq(adapter->msix_entries[0].vector, netdev);
557}
558
559/**
560 * i40evf_configure_tx - Configure Transmit Unit after Reset
561 * @adapter: board private structure
562 *
563 * Configure the Tx unit of the MAC after a reset.
564 **/
565static void i40evf_configure_tx(struct i40evf_adapter *adapter)
566{
567 struct i40e_hw *hw = &adapter->hw;
568 int i;
569 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
570 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
571}
572
573/**
574 * i40evf_configure_rx - Configure Receive Unit after Reset
575 * @adapter: board private structure
576 *
577 * Configure the Rx unit of the MAC after a reset.
578 **/
579static void i40evf_configure_rx(struct i40evf_adapter *adapter)
580{
581 struct i40e_hw *hw = &adapter->hw;
582 struct net_device *netdev = adapter->netdev;
583 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
584 int i;
585 int rx_buf_len;
586
587
588 adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
589 adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
590
591 /* Decide whether to use packet split mode or not */
592 if (netdev->mtu > ETH_DATA_LEN) {
593 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
594 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
595 else
596 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
597 } else {
598 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
599 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
600 else
601 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
602 }
603
604 /* Set the RX buffer length according to the mode */
605 if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
606 rx_buf_len = I40E_RX_HDR_SIZE;
607 } else {
608 if (netdev->mtu <= ETH_DATA_LEN)
609 rx_buf_len = I40EVF_RXBUFFER_2048;
610 else
611 rx_buf_len = ALIGN(max_frame, 1024);
612 }
613
614 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
615 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
616 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
617 }
618}
619
620/**
621 * i40evf_find_vlan - Search filter list for specific vlan filter
622 * @adapter: board private structure
623 * @vlan: vlan tag
624 *
625 * Returns ptr to the filter object or NULL
626 **/
627static struct
628i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
629{
630 struct i40evf_vlan_filter *f;
631
632 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
633 if (vlan == f->vlan)
634 return f;
635 }
636 return NULL;
637}
638
639/**
640 * i40evf_add_vlan - Add a vlan filter to the list
641 * @adapter: board private structure
642 * @vlan: VLAN tag
643 *
644 * Returns ptr to the filter object or NULL when no memory available.
645 **/
646static struct
647i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
648{
649 struct i40evf_vlan_filter *f;
650
651 f = i40evf_find_vlan(adapter, vlan);
652 if (NULL == f) {
653 f = kzalloc(sizeof(*f), GFP_ATOMIC);
654 if (NULL == f) {
655 dev_info(&adapter->pdev->dev,
656 "%s: no memory for new VLAN filter\n",
657 __func__);
658 return NULL;
659 }
660 f->vlan = vlan;
661
662 INIT_LIST_HEAD(&f->list);
663 list_add(&f->list, &adapter->vlan_filter_list);
664 f->add = true;
665 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
666 }
667
668 return f;
669}
670
671/**
672 * i40evf_del_vlan - Remove a vlan filter from the list
673 * @adapter: board private structure
674 * @vlan: VLAN tag
675 **/
676static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
677{
678 struct i40evf_vlan_filter *f;
679
680 f = i40evf_find_vlan(adapter, vlan);
681 if (f) {
682 f->remove = true;
683 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
684 }
685 return;
686}
687
688/**
689 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
690 * @netdev: network device struct
691 * @vid: VLAN tag
692 **/
693static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
694 __always_unused __be16 proto, u16 vid)
695{
696 struct i40evf_adapter *adapter = netdev_priv(netdev);
697
698 if (i40evf_add_vlan(adapter, vid) == NULL)
699 return -ENOMEM;
700 return 0;
701}
702
703/**
704 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
705 * @netdev: network device struct
706 * @vid: VLAN tag
707 **/
708static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
709 __always_unused __be16 proto, u16 vid)
710{
711 struct i40evf_adapter *adapter = netdev_priv(netdev);
712
713 i40evf_del_vlan(adapter, vid);
714 return 0;
715}
716
717/**
718 * i40evf_find_filter - Search filter list for specific mac filter
719 * @adapter: board private structure
720 * @macaddr: the MAC address
721 *
722 * Returns ptr to the filter object or NULL
723 **/
724static struct
725i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
726 u8 *macaddr)
727{
728 struct i40evf_mac_filter *f;
729
730 if (!macaddr)
731 return NULL;
732
733 list_for_each_entry(f, &adapter->mac_filter_list, list) {
734 if (ether_addr_equal(macaddr, f->macaddr))
735 return f;
736 }
737 return NULL;
738}
739
740/**
741 * i40e_add_filter - Add a mac filter to the filter list
742 * @adapter: board private structure
743 * @macaddr: the MAC address
744 *
745 * Returns ptr to the filter object or NULL when no memory available.
746 **/
747static struct
748i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
749 u8 *macaddr)
750{
751 struct i40evf_mac_filter *f;
752
753 if (!macaddr)
754 return NULL;
755
756 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
757 &adapter->crit_section))
758 mdelay(1);
759
760 f = i40evf_find_filter(adapter, macaddr);
761 if (NULL == f) {
762 f = kzalloc(sizeof(*f), GFP_ATOMIC);
763 if (NULL == f) {
764 dev_info(&adapter->pdev->dev,
765 "%s: no memory for new filter\n", __func__);
766 clear_bit(__I40EVF_IN_CRITICAL_TASK,
767 &adapter->crit_section);
768 return NULL;
769 }
770
771 memcpy(f->macaddr, macaddr, ETH_ALEN);
772
773 list_add(&f->list, &adapter->mac_filter_list);
774 f->add = true;
775 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
776 }
777
778 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
779 return f;
780}
781
782/**
783 * i40evf_set_mac - NDO callback to set port mac address
784 * @netdev: network interface device structure
785 * @p: pointer to an address structure
786 *
787 * Returns 0 on success, negative on failure
788 **/
789static int i40evf_set_mac(struct net_device *netdev, void *p)
790{
791 struct i40evf_adapter *adapter = netdev_priv(netdev);
792 struct i40e_hw *hw = &adapter->hw;
793 struct i40evf_mac_filter *f;
794 struct sockaddr *addr = p;
795
796 if (!is_valid_ether_addr(addr->sa_data))
797 return -EADDRNOTAVAIL;
798
799 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
800 return 0;
801
802 f = i40evf_add_filter(adapter, addr->sa_data);
803 if (f) {
804 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
805 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
806 netdev->addr_len);
807 }
808
809 return (f == NULL) ? -ENOMEM : 0;
810}
811
812/**
813 * i40evf_set_rx_mode - NDO callback to set the netdev filters
814 * @netdev: network interface device structure
815 **/
816static void i40evf_set_rx_mode(struct net_device *netdev)
817{
818 struct i40evf_adapter *adapter = netdev_priv(netdev);
819 struct i40evf_mac_filter *f, *ftmp;
820 struct netdev_hw_addr *uca;
821 struct netdev_hw_addr *mca;
822
823 /* add addr if not already in the filter list */
824 netdev_for_each_uc_addr(uca, netdev) {
825 i40evf_add_filter(adapter, uca->addr);
826 }
827 netdev_for_each_mc_addr(mca, netdev) {
828 i40evf_add_filter(adapter, mca->addr);
829 }
830
831 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
832 &adapter->crit_section))
833 mdelay(1);
834 /* remove filter if not in netdev list */
835 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
836 bool found = false;
837
838 if (f->macaddr[0] & 0x01) {
839 netdev_for_each_mc_addr(mca, netdev) {
840 if (ether_addr_equal(mca->addr, f->macaddr)) {
841 found = true;
842 break;
843 }
844 }
845 } else {
846 netdev_for_each_uc_addr(uca, netdev) {
847 if (ether_addr_equal(uca->addr, f->macaddr)) {
848 found = true;
849 break;
850 }
851 }
852 }
853 if (found) {
854 f->remove = true;
855 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
856 }
857 }
858 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
859}
860
861/**
862 * i40evf_napi_enable_all - enable NAPI on all queue vectors
863 * @adapter: board private structure
864 **/
865static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
866{
867 int q_idx;
868 struct i40e_q_vector *q_vector;
869 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
870
871 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
872 struct napi_struct *napi;
873 q_vector = adapter->q_vector[q_idx];
874 napi = &q_vector->napi;
875 napi_enable(napi);
876 }
877}
878
879/**
880 * i40evf_napi_disable_all - disable NAPI on all queue vectors
881 * @adapter: board private structure
882 **/
883static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
884{
885 int q_idx;
886 struct i40e_q_vector *q_vector;
887 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
888
889 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
890 q_vector = adapter->q_vector[q_idx];
891 napi_disable(&q_vector->napi);
892 }
893}
894
895/**
896 * i40evf_configure - set up transmit and receive data structures
897 * @adapter: board private structure
898 **/
899static void i40evf_configure(struct i40evf_adapter *adapter)
900{
901 struct net_device *netdev = adapter->netdev;
902 int i;
903
904 i40evf_set_rx_mode(netdev);
905
906 i40evf_configure_tx(adapter);
907 i40evf_configure_rx(adapter);
908 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
909
910 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
911 struct i40e_ring *ring = adapter->rx_rings[i];
912 i40evf_alloc_rx_buffers(ring, ring->count);
913 ring->next_to_use = ring->count - 1;
914 writel(ring->next_to_use, ring->tail);
915 }
916}
917
918/**
919 * i40evf_up_complete - Finish the last steps of bringing up a connection
920 * @adapter: board private structure
921 **/
922static int i40evf_up_complete(struct i40evf_adapter *adapter)
923{
924 adapter->state = __I40EVF_RUNNING;
925 clear_bit(__I40E_DOWN, &adapter->vsi.state);
926
927 i40evf_napi_enable_all(adapter);
928
929 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
930 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
931 return 0;
932}
933
934/**
935 * i40evf_clean_all_rx_rings - Free Rx Buffers for all queues
936 * @adapter: board private structure
937 **/
938static void i40evf_clean_all_rx_rings(struct i40evf_adapter *adapter)
939{
940 int i;
941
942 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
943 i40evf_clean_rx_ring(adapter->rx_rings[i]);
944}
945
946/**
947 * i40evf_clean_all_tx_rings - Free Tx Buffers for all queues
948 * @adapter: board private structure
949 **/
950static void i40evf_clean_all_tx_rings(struct i40evf_adapter *adapter)
951{
952 int i;
953
954 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
955 i40evf_clean_tx_ring(adapter->tx_rings[i]);
956}
957
958/**
959 * i40e_down - Shutdown the connection processing
960 * @adapter: board private structure
961 **/
962void i40evf_down(struct i40evf_adapter *adapter)
963{
964 struct net_device *netdev = adapter->netdev;
965 struct i40evf_mac_filter *f;
966
967 /* remove all MAC filters from the VSI */
968 list_for_each_entry(f, &adapter->mac_filter_list, list) {
969 f->remove = true;
970 }
971 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
972 /* disable receives */
973 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
974 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
975 msleep(20);
976
977 netif_tx_disable(netdev);
978
979 netif_tx_stop_all_queues(netdev);
980
981 i40evf_irq_disable(adapter);
982
983 i40evf_napi_disable_all(adapter);
984
985 netif_carrier_off(netdev);
986
987 i40evf_clean_all_tx_rings(adapter);
988 i40evf_clean_all_rx_rings(adapter);
989}
990
991/**
992 * i40evf_acquire_msix_vectors - Setup the MSIX capability
993 * @adapter: board private structure
994 * @vectors: number of vectors to request
995 *
996 * Work with the OS to set up the MSIX vectors needed.
997 *
998 * Returns 0 on success, negative on failure
999 **/
1000static int
1001i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1002{
1003 int err, vector_threshold;
1004
1005 /* We'll want at least 3 (vector_threshold):
1006 * 0) Other (Admin Queue and link, mostly)
1007 * 1) TxQ[0] Cleanup
1008 * 2) RxQ[0] Cleanup
1009 */
1010 vector_threshold = MIN_MSIX_COUNT;
1011
1012 /* The more we get, the more we will assign to Tx/Rx Cleanup
1013 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1014 * Right now, we simply care about how many we'll get; we'll
1015 * set them up later while requesting irq's.
1016 */
1017 while (vectors >= vector_threshold) {
1018 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
1019 vectors);
1020 if (!err) /* Success in acquiring all requested vectors. */
1021 break;
1022 else if (err < 0)
1023 vectors = 0; /* Nasty failure, quit now */
1024 else /* err == number of vectors we should try again with */
1025 vectors = err;
1026 }
1027
1028 if (vectors < vector_threshold) {
1029 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts.\n");
1030 kfree(adapter->msix_entries);
1031 adapter->msix_entries = NULL;
1032 err = -EIO;
1033 } else {
1034 /* Adjust for only the vectors we'll use, which is minimum
1035 * of max_msix_q_vectors + NONQ_VECS, or the number of
1036 * vectors we were allocated.
1037 */
1038 adapter->num_msix_vectors = vectors;
1039 }
1040 return err;
1041}
1042
1043/**
1044 * i40evf_free_queues - Free memory for all rings
1045 * @adapter: board private structure to initialize
1046 *
1047 * Free all of the memory associated with queue pairs.
1048 **/
1049static void i40evf_free_queues(struct i40evf_adapter *adapter)
1050{
1051 int i;
1052
1053 if (!adapter->vsi_res)
1054 return;
1055 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1056 if (adapter->tx_rings[i])
1057 kfree_rcu(adapter->tx_rings[i], rcu);
1058 adapter->tx_rings[i] = NULL;
1059 adapter->rx_rings[i] = NULL;
1060 }
1061}
1062
1063/**
1064 * i40evf_alloc_queues - Allocate memory for all rings
1065 * @adapter: board private structure to initialize
1066 *
1067 * We allocate one ring per queue at run-time since we don't know the
1068 * number of queues at compile-time. The polling_netdev array is
1069 * intended for Multiqueue, but should work fine with a single queue.
1070 **/
1071static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1072{
1073 int i;
1074
1075 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1076 struct i40e_ring *tx_ring;
1077 struct i40e_ring *rx_ring;
1078
1079 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
1080 if (!tx_ring)
1081 goto err_out;
1082
1083 tx_ring->queue_index = i;
1084 tx_ring->netdev = adapter->netdev;
1085 tx_ring->dev = &adapter->pdev->dev;
1086 tx_ring->count = I40EVF_DEFAULT_TXD;
1087 adapter->tx_rings[i] = tx_ring;
1088
1089 rx_ring = &tx_ring[1];
1090 rx_ring->queue_index = i;
1091 rx_ring->netdev = adapter->netdev;
1092 rx_ring->dev = &adapter->pdev->dev;
1093 rx_ring->count = I40EVF_DEFAULT_RXD;
1094 adapter->rx_rings[i] = rx_ring;
1095 }
1096
1097 return 0;
1098
1099err_out:
1100 i40evf_free_queues(adapter);
1101 return -ENOMEM;
1102}
1103
1104/**
1105 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1106 * @adapter: board private structure to initialize
1107 *
1108 * Attempt to configure the interrupts using the best available
1109 * capabilities of the hardware and the kernel.
1110 **/
1111static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1112{
1113 int vector, v_budget;
1114 int pairs = 0;
1115 int err = 0;
1116
1117 if (!adapter->vsi_res) {
1118 err = -EIO;
1119 goto out;
1120 }
1121 pairs = adapter->vsi_res->num_queue_pairs;
1122
1123 /* It's easy to be greedy for MSI-X vectors, but it really
1124 * doesn't do us much good if we have a lot more vectors
1125 * than CPU's. So let's be conservative and only ask for
1126 * (roughly) twice the number of vectors as there are CPU's.
1127 */
1128 v_budget = min(pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1129 v_budget = min(v_budget, (int)adapter->vf_res->max_vectors + 1);
1130
1131 /* A failure in MSI-X entry allocation isn't fatal, but it does
1132 * mean we disable MSI-X capabilities of the adapter.
1133 */
1134 adapter->msix_entries = kcalloc(v_budget,
1135 sizeof(struct msix_entry), GFP_KERNEL);
1136 if (!adapter->msix_entries) {
1137 err = -ENOMEM;
1138 goto out;
1139 }
1140
1141 for (vector = 0; vector < v_budget; vector++)
1142 adapter->msix_entries[vector].entry = vector;
1143
1144 i40evf_acquire_msix_vectors(adapter, v_budget);
1145
1146out:
1147 adapter->netdev->real_num_tx_queues = pairs;
1148 return err;
1149}
1150
1151/**
1152 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1153 * @adapter: board private structure to initialize
1154 *
1155 * We allocate one q_vector per queue interrupt. If allocation fails we
1156 * return -ENOMEM.
1157 **/
1158static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1159{
1160 int q_idx, num_q_vectors;
1161 struct i40e_q_vector *q_vector;
1162
1163 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1164
1165 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1166 q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
1167 if (!q_vector)
1168 goto err_out;
1169 q_vector->adapter = adapter;
1170 q_vector->vsi = &adapter->vsi;
1171 q_vector->v_idx = q_idx;
1172 netif_napi_add(adapter->netdev, &q_vector->napi,
1173 i40evf_napi_poll, 64);
1174 adapter->q_vector[q_idx] = q_vector;
1175 }
1176
1177 return 0;
1178
1179err_out:
1180 while (q_idx) {
1181 q_idx--;
1182 q_vector = adapter->q_vector[q_idx];
1183 netif_napi_del(&q_vector->napi);
1184 kfree(q_vector);
1185 adapter->q_vector[q_idx] = NULL;
1186 }
1187 return -ENOMEM;
1188}
1189
1190/**
1191 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1192 * @adapter: board private structure to initialize
1193 *
1194 * This function frees the memory allocated to the q_vectors. In addition if
1195 * NAPI is enabled it will delete any references to the NAPI struct prior
1196 * to freeing the q_vector.
1197 **/
1198static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1199{
1200 int q_idx, num_q_vectors;
1201 int napi_vectors;
1202
1203 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1204 napi_vectors = adapter->vsi_res->num_queue_pairs;
1205
1206 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1207 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1208
1209 adapter->q_vector[q_idx] = NULL;
1210 if (q_idx < napi_vectors)
1211 netif_napi_del(&q_vector->napi);
1212 kfree(q_vector);
1213 }
1214}
1215
1216/**
1217 * i40evf_reset_interrupt_capability - Reset MSIX setup
1218 * @adapter: board private structure
1219 *
1220 **/
1221void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1222{
1223 pci_disable_msix(adapter->pdev);
1224 kfree(adapter->msix_entries);
1225 adapter->msix_entries = NULL;
1226
1227 return;
1228}
1229
1230/**
1231 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1232 * @adapter: board private structure to initialize
1233 *
1234 **/
1235int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1236{
1237 int err;
1238
1239 err = i40evf_set_interrupt_capability(adapter);
1240 if (err) {
1241 dev_err(&adapter->pdev->dev,
1242 "Unable to setup interrupt capabilities\n");
1243 goto err_set_interrupt;
1244 }
1245
1246 err = i40evf_alloc_q_vectors(adapter);
1247 if (err) {
1248 dev_err(&adapter->pdev->dev,
1249 "Unable to allocate memory for queue vectors\n");
1250 goto err_alloc_q_vectors;
1251 }
1252
1253 err = i40evf_alloc_queues(adapter);
1254 if (err) {
1255 dev_err(&adapter->pdev->dev,
1256 "Unable to allocate memory for queues\n");
1257 goto err_alloc_queues;
1258 }
1259
1260 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1261 (adapter->vsi_res->num_queue_pairs > 1) ? "Enabled" :
1262 "Disabled", adapter->vsi_res->num_queue_pairs);
1263
1264 return 0;
1265err_alloc_queues:
1266 i40evf_free_q_vectors(adapter);
1267err_alloc_q_vectors:
1268 i40evf_reset_interrupt_capability(adapter);
1269err_set_interrupt:
1270 return err;
1271}
1272
1273/**
1274 * i40evf_watchdog_timer - Periodic call-back timer
1275 * @data: pointer to adapter disguised as unsigned long
1276 **/
1277static void i40evf_watchdog_timer(unsigned long data)
1278{
1279 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1280 schedule_work(&adapter->watchdog_task);
1281 /* timer will be rescheduled in watchdog task */
1282}
1283
1284/**
1285 * i40evf_watchdog_task - Periodic call-back task
1286 * @work: pointer to work_struct
1287 **/
1288static void i40evf_watchdog_task(struct work_struct *work)
1289{
1290 struct i40evf_adapter *adapter = container_of(work,
1291 struct i40evf_adapter,
1292 watchdog_task);
1293 struct i40e_hw *hw = &adapter->hw;
1294
1295 if (adapter->state < __I40EVF_DOWN)
1296 goto watchdog_done;
1297
1298 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1299 goto watchdog_done;
1300
1301 /* check for unannounced reset */
1302 if ((adapter->state != __I40EVF_RESETTING) &&
1303 (rd32(hw, I40E_VFGEN_RSTAT) & 0x3) != I40E_VFR_VFACTIVE) {
1304 adapter->state = __I40EVF_RESETTING;
1305 schedule_work(&adapter->reset_task);
1306 dev_info(&adapter->pdev->dev, "%s: hardware reset detected\n",
1307 __func__);
1308 goto watchdog_done;
1309 }
1310
1311 /* Process admin queue tasks. After init, everything gets done
1312 * here so we don't race on the admin queue.
1313 */
1314 if (adapter->aq_pending)
1315 goto watchdog_done;
1316
1317 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1318 i40evf_map_queues(adapter);
1319 goto watchdog_done;
1320 }
1321
1322 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1323 i40evf_add_ether_addrs(adapter);
1324 goto watchdog_done;
1325 }
1326
1327 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1328 i40evf_add_vlans(adapter);
1329 goto watchdog_done;
1330 }
1331
1332 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1333 i40evf_del_ether_addrs(adapter);
1334 goto watchdog_done;
1335 }
1336
1337 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1338 i40evf_del_vlans(adapter);
1339 goto watchdog_done;
1340 }
1341
1342 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1343 i40evf_disable_queues(adapter);
1344 goto watchdog_done;
1345 }
1346
1347 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1348 i40evf_configure_queues(adapter);
1349 goto watchdog_done;
1350 }
1351
1352 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1353 i40evf_enable_queues(adapter);
1354 goto watchdog_done;
1355 }
1356
1357 if (adapter->state == __I40EVF_RUNNING)
1358 i40evf_request_stats(adapter);
1359
1360 i40evf_irq_enable(adapter, true);
1361 i40evf_fire_sw_int(adapter, 0xFF);
1362watchdog_done:
1363 if (adapter->aq_required)
1364 mod_timer(&adapter->watchdog_timer,
1365 jiffies + msecs_to_jiffies(20));
1366 else
1367 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1368 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1369 schedule_work(&adapter->adminq_task);
1370}
1371
1372/**
1373 * i40evf_configure_rss - Prepare for RSS if used
1374 * @adapter: board private structure
1375 **/
1376static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1377{
1378 struct i40e_hw *hw = &adapter->hw;
1379 u32 lut = 0;
1380 int i, j;
1381 u64 hena;
1382
1383 /* Set of random keys generated using kernel random number generator */
1384 static const u32 seed[I40E_VFQF_HKEY_MAX_INDEX + 1] = {
1385 0x794221b4, 0xbca0c5ab, 0x6cd5ebd9, 0x1ada6127,
1386 0x983b3aa1, 0x1c4e71eb, 0x7f6328b2, 0xfcdc0da0,
1387 0xc135cafa, 0x7a6f7e2d, 0xe7102d28, 0x163cd12e,
1388 0x4954b126 };
1389
1390 /* Hash type is configured by the PF - we just supply the key */
1391
1392 /* Fill out hash function seed */
1393 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1394 wr32(hw, I40E_VFQF_HKEY(i), seed[i]);
1395
1396 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1397 hena = I40E_DEFAULT_RSS_HENA;
1398 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1399 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1400
1401 /* Populate the LUT with max no. of queues in round robin fashion */
1402 for (i = 0, j = 0; i < I40E_VFQF_HLUT_MAX_INDEX; i++, j++) {
1403 if (j == adapter->vsi_res->num_queue_pairs)
1404 j = 0;
1405 /* lut = 4-byte sliding window of 4 lut entries */
1406 lut = (lut << 8) | (j &
1407 ((0x1 << 8) - 1));
1408 /* On i = 3, we have 4 entries in lut; write to the register */
1409 if ((i & 3) == 3)
1410 wr32(hw, I40E_VFQF_HLUT(i >> 2), lut);
1411 }
1412 i40e_flush(hw);
1413}
1414
1415/**
1416 * i40evf_reset_task - Call-back task to handle hardware reset
1417 * @work: pointer to work_struct
1418 *
1419 * During reset we need to shut down and reinitialize the admin queue
1420 * before we can use it to communicate with the PF again. We also clear
1421 * and reinit the rings because that context is lost as well.
1422 **/
1423static void i40evf_reset_task(struct work_struct *work)
1424{
1425 struct i40evf_adapter *adapter =
1426 container_of(work, struct i40evf_adapter, reset_task);
1427 struct i40e_hw *hw = &adapter->hw;
1428 int i = 0, err;
1429 uint32_t rstat_val;
1430
1431 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1432 &adapter->crit_section))
1433 udelay(500);
1434
1435 /* wait until the reset is complete */
1436 for (i = 0; i < 20; i++) {
1437 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1438 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1439 if (rstat_val == I40E_VFR_COMPLETED)
1440 break;
1441 else
1442 mdelay(100);
1443 }
1444 if (i == 20) {
1445 /* reset never finished */
1446 dev_info(&adapter->pdev->dev, "%s: reset never finished: %x\n",
1447 __func__, rstat_val);
1448 /* carry on anyway */
1449 }
1450 i40evf_down(adapter);
1451 adapter->state = __I40EVF_RESETTING;
1452
1453 /* kill and reinit the admin queue */
1454 if (i40evf_shutdown_adminq(hw))
1455 dev_warn(&adapter->pdev->dev,
1456 "%s: Failed to destroy the Admin Queue resources\n",
1457 __func__);
1458 err = i40evf_init_adminq(hw);
1459 if (err)
1460 dev_info(&adapter->pdev->dev, "%s: init_adminq failed: %d\n",
1461 __func__, err);
1462
1463 adapter->aq_pending = 0;
1464 adapter->aq_required = 0;
1465 i40evf_map_queues(adapter);
1466 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1467
1468 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1469
1470 if (netif_running(adapter->netdev)) {
1471 /* allocate transmit descriptors */
1472 err = i40evf_setup_all_tx_resources(adapter);
1473 if (err)
1474 goto reset_err;
1475
1476 /* allocate receive descriptors */
1477 err = i40evf_setup_all_rx_resources(adapter);
1478 if (err)
1479 goto reset_err;
1480
1481 i40evf_configure(adapter);
1482
1483 err = i40evf_up_complete(adapter);
1484 if (err)
1485 goto reset_err;
1486
1487 i40evf_irq_enable(adapter, true);
1488 }
1489 return;
1490reset_err:
1491 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit.\n");
1492 i40evf_close(adapter->netdev);
1493}
1494
1495/**
1496 * i40evf_adminq_task - worker thread to clean the admin queue
1497 * @work: pointer to work_struct containing our data
1498 **/
1499static void i40evf_adminq_task(struct work_struct *work)
1500{
1501 struct i40evf_adapter *adapter =
1502 container_of(work, struct i40evf_adapter, adminq_task);
1503 struct i40e_hw *hw = &adapter->hw;
1504 struct i40e_arq_event_info event;
1505 struct i40e_virtchnl_msg *v_msg;
1506 i40e_status ret;
1507 u16 pending;
1508
1509 event.msg_size = I40EVF_MAX_AQ_BUF_SIZE;
1510 event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
1511 if (!event.msg_buf) {
1512 dev_info(&adapter->pdev->dev, "%s: no memory for ARQ clean\n",
1513 __func__);
1514 return;
1515 }
1516 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1517 do {
1518 ret = i40evf_clean_arq_element(hw, &event, &pending);
1519 if (ret)
1520 break; /* No event to process or error cleaning ARQ */
1521
1522 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1523 v_msg->v_retval, event.msg_buf,
1524 event.msg_size);
1525 if (pending != 0) {
1526 dev_info(&adapter->pdev->dev,
1527 "%s: ARQ: Pending events %d\n",
1528 __func__, pending);
1529 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1530 }
1531 } while (pending);
1532
1533 /* re-enable Admin queue interrupt cause */
1534 i40evf_misc_irq_enable(adapter);
1535
1536 kfree(event.msg_buf);
1537}
1538
1539/**
1540 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1541 * @adapter: board private structure
1542 *
1543 * Free all transmit software resources
1544 **/
1545static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1546{
1547 int i;
1548
1549 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1550 if (adapter->tx_rings[i]->desc)
1551 i40evf_free_tx_resources(adapter->tx_rings[i]);
1552
1553}
1554
1555/**
1556 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1557 * @adapter: board private structure
1558 *
1559 * If this function returns with an error, then it's possible one or
1560 * more of the rings is populated (while the rest are not). It is the
1561 * callers duty to clean those orphaned rings.
1562 *
1563 * Return 0 on success, negative on failure
1564 **/
1565static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1566{
1567 int i, err = 0;
1568
1569 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1570 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1571 if (!err)
1572 continue;
1573 dev_err(&adapter->pdev->dev,
1574 "%s: Allocation for Tx Queue %u failed\n",
1575 __func__, i);
1576 break;
1577 }
1578
1579 return err;
1580}
1581
1582/**
1583 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1584 * @adapter: board private structure
1585 *
1586 * If this function returns with an error, then it's possible one or
1587 * more of the rings is populated (while the rest are not). It is the
1588 * callers duty to clean those orphaned rings.
1589 *
1590 * Return 0 on success, negative on failure
1591 **/
1592static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1593{
1594 int i, err = 0;
1595
1596 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1597 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1598 if (!err)
1599 continue;
1600 dev_err(&adapter->pdev->dev,
1601 "%s: Allocation for Rx Queue %u failed\n",
1602 __func__, i);
1603 break;
1604 }
1605 return err;
1606}
1607
1608/**
1609 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1610 * @adapter: board private structure
1611 *
1612 * Free all receive software resources
1613 **/
1614static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1615{
1616 int i;
1617
1618 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1619 if (adapter->rx_rings[i]->desc)
1620 i40evf_free_rx_resources(adapter->rx_rings[i]);
1621}
1622
1623/**
1624 * i40evf_open - Called when a network interface is made active
1625 * @netdev: network interface device structure
1626 *
1627 * Returns 0 on success, negative value on failure
1628 *
1629 * The open entry point is called when a network interface is made
1630 * active by the system (IFF_UP). At this point all resources needed
1631 * for transmit and receive operations are allocated, the interrupt
1632 * handler is registered with the OS, the watchdog timer is started,
1633 * and the stack is notified that the interface is ready.
1634 **/
1635static int i40evf_open(struct net_device *netdev)
1636{
1637 struct i40evf_adapter *adapter = netdev_priv(netdev);
1638 int err;
1639
1640 if (adapter->state != __I40EVF_DOWN)
1641 return -EBUSY;
1642
1643 /* allocate transmit descriptors */
1644 err = i40evf_setup_all_tx_resources(adapter);
1645 if (err)
1646 goto err_setup_tx;
1647
1648 /* allocate receive descriptors */
1649 err = i40evf_setup_all_rx_resources(adapter);
1650 if (err)
1651 goto err_setup_rx;
1652
1653 /* clear any pending interrupts, may auto mask */
1654 err = i40evf_request_traffic_irqs(adapter, netdev->name);
1655 if (err)
1656 goto err_req_irq;
1657
1658 i40evf_configure(adapter);
1659
1660 err = i40evf_up_complete(adapter);
1661 if (err)
1662 goto err_req_irq;
1663
1664 i40evf_irq_enable(adapter, true);
1665
1666 return 0;
1667
1668err_req_irq:
1669 i40evf_down(adapter);
1670 i40evf_free_traffic_irqs(adapter);
1671err_setup_rx:
1672 i40evf_free_all_rx_resources(adapter);
1673err_setup_tx:
1674 i40evf_free_all_tx_resources(adapter);
1675
1676 return err;
1677}
1678
1679/**
1680 * i40evf_close - Disables a network interface
1681 * @netdev: network interface device structure
1682 *
1683 * Returns 0, this is not allowed to fail
1684 *
1685 * The close entry point is called when an interface is de-activated
1686 * by the OS. The hardware is still under the drivers control, but
1687 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1688 * are freed, along with all transmit and receive resources.
1689 **/
1690static int i40evf_close(struct net_device *netdev)
1691{
1692 struct i40evf_adapter *adapter = netdev_priv(netdev);
1693
1694 /* signal that we are down to the interrupt handler */
1695 adapter->state = __I40EVF_DOWN;
1696 set_bit(__I40E_DOWN, &adapter->vsi.state);
1697
1698 i40evf_down(adapter);
1699 i40evf_free_traffic_irqs(adapter);
1700
1701 i40evf_free_all_tx_resources(adapter);
1702 i40evf_free_all_rx_resources(adapter);
1703
1704 return 0;
1705}
1706
1707/**
1708 * i40evf_get_stats - Get System Network Statistics
1709 * @netdev: network interface device structure
1710 *
1711 * Returns the address of the device statistics structure.
1712 * The statistics are actually updated from the timer callback.
1713 **/
1714static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1715{
1716 struct i40evf_adapter *adapter = netdev_priv(netdev);
1717
1718 /* only return the current stats */
1719 return &adapter->net_stats;
1720}
1721
1722/**
1723 * i40evf_reinit_locked - Software reinit
1724 * @adapter: board private structure
1725 *
1726 * Reinititalizes the ring structures in response to a software configuration
1727 * change. Roughly the same as close followed by open, but skips releasing
1728 * and reallocating the interrupts.
1729 **/
1730void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1731{
1732 struct net_device *netdev = adapter->netdev;
1733 int err;
1734
1735 WARN_ON(in_interrupt());
1736
1737 adapter->state = __I40EVF_RESETTING;
1738
1739 i40evf_down(adapter);
1740
1741 /* allocate transmit descriptors */
1742 err = i40evf_setup_all_tx_resources(adapter);
1743 if (err)
1744 goto err_reinit;
1745
1746 /* allocate receive descriptors */
1747 err = i40evf_setup_all_rx_resources(adapter);
1748 if (err)
1749 goto err_reinit;
1750
1751 i40evf_configure(adapter);
1752
1753 err = i40evf_up_complete(adapter);
1754 if (err)
1755 goto err_reinit;
1756
1757 i40evf_irq_enable(adapter, true);
1758 return;
1759
1760err_reinit:
1761 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit.\n");
1762 i40evf_close(netdev);
1763}
1764
1765/**
1766 * i40evf_change_mtu - Change the Maximum Transfer Unit
1767 * @netdev: network interface device structure
1768 * @new_mtu: new value for maximum frame size
1769 *
1770 * Returns 0 on success, negative on failure
1771 **/
1772static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1773{
1774 struct i40evf_adapter *adapter = netdev_priv(netdev);
1775 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1776
1777 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1778 return -EINVAL;
1779
1780 /* must set new MTU before calling down or up */
1781 netdev->mtu = new_mtu;
1782 i40evf_reinit_locked(adapter);
1783 return 0;
1784}
1785
1786static const struct net_device_ops i40evf_netdev_ops = {
1787 .ndo_open = i40evf_open,
1788 .ndo_stop = i40evf_close,
1789 .ndo_start_xmit = i40evf_xmit_frame,
1790 .ndo_get_stats = i40evf_get_stats,
1791 .ndo_set_rx_mode = i40evf_set_rx_mode,
1792 .ndo_validate_addr = eth_validate_addr,
1793 .ndo_set_mac_address = i40evf_set_mac,
1794 .ndo_change_mtu = i40evf_change_mtu,
1795 .ndo_tx_timeout = i40evf_tx_timeout,
1796 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
1797 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
1798};
1799
1800/**
1801 * i40evf_check_reset_complete - check that VF reset is complete
1802 * @hw: pointer to hw struct
1803 *
1804 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1805 **/
1806static int i40evf_check_reset_complete(struct i40e_hw *hw)
1807{
1808 u32 rstat;
1809 int i;
1810
1811 for (i = 0; i < 100; i++) {
1812 rstat = rd32(hw, I40E_VFGEN_RSTAT);
1813 if (rstat == I40E_VFR_VFACTIVE)
1814 return 0;
1815 udelay(10);
1816 }
1817 return -EBUSY;
1818}
1819
1820/**
1821 * i40evf_init_task - worker thread to perform delayed initialization
1822 * @work: pointer to work_struct containing our data
1823 *
1824 * This task completes the work that was begun in probe. Due to the nature
1825 * of VF-PF communications, we may need to wait tens of milliseconds to get
1826 * reponses back from the PF. Rather than busy-wait in probe and bog down the
1827 * whole system, we'll do it in a task so we can sleep.
1828 * This task only runs during driver init. Once we've established
1829 * communications with the PF driver and set up our netdev, the watchdog
1830 * takes over.
1831 **/
1832static void i40evf_init_task(struct work_struct *work)
1833{
1834 struct i40evf_adapter *adapter = container_of(work,
1835 struct i40evf_adapter,
1836 init_task.work);
1837 struct net_device *netdev = adapter->netdev;
1838 struct i40evf_mac_filter *f;
1839 struct i40e_hw *hw = &adapter->hw;
1840 struct pci_dev *pdev = adapter->pdev;
1841 int i, err, bufsz;
1842
1843 switch (adapter->state) {
1844 case __I40EVF_STARTUP:
1845 /* driver loaded, probe complete */
1846 err = i40e_set_mac_type(hw);
1847 if (err) {
1848 dev_info(&pdev->dev, "%s: set_mac_type failed: %d\n",
1849 __func__, err);
1850 goto err;
1851 }
1852 err = i40evf_check_reset_complete(hw);
1853 if (err) {
1854 dev_info(&pdev->dev, "%s: device is still in reset (%d).\n",
1855 __func__, err);
1856 goto err;
1857 }
1858 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
1859 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
1860 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1861 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1862
1863 err = i40evf_init_adminq(hw);
1864 if (err) {
1865 dev_info(&pdev->dev, "%s: init_adminq failed: %d\n",
1866 __func__, err);
1867 goto err;
1868 }
1869 err = i40evf_send_api_ver(adapter);
1870 if (err) {
1871 dev_info(&pdev->dev, "%s: unable to send to PF (%d)\n",
1872 __func__, err);
1873 i40evf_shutdown_adminq(hw);
1874 goto err;
1875 }
1876 adapter->state = __I40EVF_INIT_VERSION_CHECK;
1877 goto restart;
1878 break;
1879 case __I40EVF_INIT_VERSION_CHECK:
1880 if (!i40evf_asq_done(hw))
1881 goto err;
1882
1883 /* aq msg sent, awaiting reply */
1884 err = i40evf_verify_api_ver(adapter);
1885 if (err) {
1886 dev_err(&pdev->dev, "Unable to verify API version, error %d\n",
1887 err);
1888 goto err;
1889 }
1890 err = i40evf_send_vf_config_msg(adapter);
1891 if (err) {
1892 dev_err(&pdev->dev, "Unable send config request, error %d\n",
1893 err);
1894 goto err;
1895 }
1896 adapter->state = __I40EVF_INIT_GET_RESOURCES;
1897 goto restart;
1898 break;
1899 case __I40EVF_INIT_GET_RESOURCES:
1900 /* aq msg sent, awaiting reply */
1901 if (!adapter->vf_res) {
1902 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
1903 (I40E_MAX_VF_VSI *
1904 sizeof(struct i40e_virtchnl_vsi_resource));
1905 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
1906 if (!adapter->vf_res) {
1907 dev_err(&pdev->dev, "%s: unable to allocate memory\n",
1908 __func__);
1909 goto err;
1910 }
1911 }
1912 err = i40evf_get_vf_config(adapter);
1913 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
1914 goto restart;
1915 if (err) {
1916 dev_info(&pdev->dev, "%s: unable to get VF config (%d)\n",
1917 __func__, err);
1918 goto err_alloc;
1919 }
1920 adapter->state = __I40EVF_INIT_SW;
1921 break;
1922 default:
1923 goto err_alloc;
1924 }
1925 /* got VF config message back from PF, now we can parse it */
1926 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
1927 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
1928 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
1929 }
1930 if (!adapter->vsi_res) {
1931 dev_info(&pdev->dev, "%s: no LAN VSI found\n", __func__);
1932 goto err_alloc;
1933 }
1934
1935 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
1936
1937 adapter->txd_count = I40EVF_DEFAULT_TXD;
1938 adapter->rxd_count = I40EVF_DEFAULT_RXD;
1939
1940 netdev->netdev_ops = &i40evf_netdev_ops;
1941 i40evf_set_ethtool_ops(netdev);
1942 netdev->watchdog_timeo = 5 * HZ;
1943
1944 netdev->features |= NETIF_F_SG |
1945 NETIF_F_IP_CSUM |
1946 NETIF_F_SCTP_CSUM |
1947 NETIF_F_IPV6_CSUM |
1948 NETIF_F_TSO |
1949 NETIF_F_TSO6 |
1950 NETIF_F_GRO;
1951
1952 if (adapter->vf_res->vf_offload_flags
1953 & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
1954 netdev->vlan_features = netdev->features;
1955 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
1956 NETIF_F_HW_VLAN_CTAG_RX |
1957 NETIF_F_HW_VLAN_CTAG_FILTER;
1958 }
1959
1960 /* The HW MAC address was set and/or determined in sw_init */
1961 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
1962 dev_info(&pdev->dev,
1963 "Invalid MAC address %pMAC, using random\n",
1964 adapter->hw.mac.addr);
1965 random_ether_addr(adapter->hw.mac.addr);
1966 }
1967 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
1968 memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
1969
1970 INIT_LIST_HEAD(&adapter->mac_filter_list);
1971 INIT_LIST_HEAD(&adapter->vlan_filter_list);
1972 f = kzalloc(sizeof(*f), GFP_ATOMIC);
1973 if (NULL == f)
1974 goto err_sw_init;
1975
1976 memcpy(f->macaddr, adapter->hw.mac.addr, ETH_ALEN);
1977 f->add = true;
1978 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1979
1980 list_add(&f->list, &adapter->mac_filter_list);
1981
1982 init_timer(&adapter->watchdog_timer);
1983 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
1984 adapter->watchdog_timer.data = (unsigned long)adapter;
1985 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1986
1987 err = i40evf_init_interrupt_scheme(adapter);
1988 if (err)
1989 goto err_sw_init;
1990 i40evf_map_rings_to_vectors(adapter);
1991 i40evf_configure_rss(adapter);
1992 err = i40evf_request_misc_irq(adapter);
1993 if (err)
1994 goto err_sw_init;
1995
1996 netif_carrier_off(netdev);
1997
1998 strcpy(netdev->name, "eth%d");
1999
2000 adapter->vsi.id = adapter->vsi_res->vsi_id;
2001 adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2002 adapter->vsi.back = adapter;
2003 adapter->vsi.base_vector = 1;
2004 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2005 adapter->vsi.rx_itr_setting = I40E_ITR_DYNAMIC;
2006 adapter->vsi.tx_itr_setting = I40E_ITR_DYNAMIC;
2007 adapter->vsi.netdev = adapter->netdev;
2008
2009 err = register_netdev(netdev);
2010 if (err)
2011 goto err_register;
2012
2013 adapter->netdev_registered = true;
2014
2015 netif_tx_stop_all_queues(netdev);
2016
2017 dev_info(&pdev->dev, "MAC address: %pMAC\n", adapter->hw.mac.addr);
2018 if (netdev->features & NETIF_F_GRO)
2019 dev_info(&pdev->dev, "GRO is enabled\n");
2020
2021 dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2022 adapter->state = __I40EVF_DOWN;
2023 set_bit(__I40E_DOWN, &adapter->vsi.state);
2024 i40evf_misc_irq_enable(adapter);
2025 return;
2026restart:
2027 schedule_delayed_work(&adapter->init_task,
2028 msecs_to_jiffies(50));
2029 return;
2030
2031err_register:
2032 i40evf_free_misc_irq(adapter);
2033err_sw_init:
2034 i40evf_reset_interrupt_capability(adapter);
2035 adapter->state = __I40EVF_FAILED;
2036err_alloc:
2037 kfree(adapter->vf_res);
2038 adapter->vf_res = NULL;
2039err:
2040 /* Things went into the weeds, so try again later */
2041 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2042 dev_err(&pdev->dev, "Failed to communicate with PF; giving up.\n");
2043 if (hw->aq.asq.count)
2044 i40evf_shutdown_adminq(hw); /* ignore error */
2045 adapter->state = __I40EVF_FAILED;
2046 return; /* do not reschedule */
2047 }
2048 schedule_delayed_work(&adapter->init_task, HZ * 3);
2049 return;
2050}
2051
2052/**
2053 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2054 * @pdev: pci device structure
2055 **/
2056static void i40evf_shutdown(struct pci_dev *pdev)
2057{
2058 struct net_device *netdev = pci_get_drvdata(pdev);
2059
2060 netif_device_detach(netdev);
2061
2062 if (netif_running(netdev))
2063 i40evf_close(netdev);
2064
2065#ifdef CONFIG_PM
2066 pci_save_state(pdev);
2067
2068#endif
2069 pci_disable_device(pdev);
2070}
2071
2072/**
2073 * i40evf_probe - Device Initialization Routine
2074 * @pdev: PCI device information struct
2075 * @ent: entry in i40evf_pci_tbl
2076 *
2077 * Returns 0 on success, negative on failure
2078 *
2079 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2080 * The OS initialization, configuring of the adapter private structure,
2081 * and a hardware reset occur.
2082 **/
2083static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2084{
2085 struct net_device *netdev;
2086 struct i40evf_adapter *adapter = NULL;
2087 struct i40e_hw *hw = NULL;
2088 int err, pci_using_dac;
2089
2090 err = pci_enable_device(pdev);
2091 if (err)
2092 return err;
2093
2094 if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
2095 pci_using_dac = true;
2096 /* coherent mask for the same size will always succeed if
2097 * dma_set_mask does
2098 */
2099 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
2100 } else if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
2101 pci_using_dac = false;
2102 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
2103 } else {
2104 dev_err(&pdev->dev, "%s: DMA configuration failed: %d\n",
2105 __func__, err);
2106 err = -EIO;
2107 goto err_dma;
2108 }
2109
2110 err = pci_request_regions(pdev, i40evf_driver_name);
2111 if (err) {
2112 dev_err(&pdev->dev,
2113 "pci_request_regions failed 0x%x\n", err);
2114 goto err_pci_reg;
2115 }
2116
2117 pci_enable_pcie_error_reporting(pdev);
2118
2119 pci_set_master(pdev);
2120
2121 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2122 MAX_TX_QUEUES);
2123 if (!netdev) {
2124 err = -ENOMEM;
2125 goto err_alloc_etherdev;
2126 }
2127
2128 SET_NETDEV_DEV(netdev, &pdev->dev);
2129
2130 pci_set_drvdata(pdev, netdev);
2131 adapter = netdev_priv(netdev);
2132 if (pci_using_dac)
2133 netdev->features |= NETIF_F_HIGHDMA;
2134
2135 adapter->netdev = netdev;
2136 adapter->pdev = pdev;
2137
2138 hw = &adapter->hw;
2139 hw->back = adapter;
2140
2141 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2142 adapter->state = __I40EVF_STARTUP;
2143
2144 /* Call save state here because it relies on the adapter struct. */
2145 pci_save_state(pdev);
2146
2147 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2148 pci_resource_len(pdev, 0));
2149 if (!hw->hw_addr) {
2150 err = -EIO;
2151 goto err_ioremap;
2152 }
2153 hw->vendor_id = pdev->vendor;
2154 hw->device_id = pdev->device;
2155 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2156 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2157 hw->subsystem_device_id = pdev->subsystem_device;
2158 hw->bus.device = PCI_SLOT(pdev->devfn);
2159 hw->bus.func = PCI_FUNC(pdev->devfn);
2160
2161 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2162 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2163 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2164 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2165 schedule_delayed_work(&adapter->init_task, 10);
2166
2167 return 0;
2168
2169err_ioremap:
2170 free_netdev(netdev);
2171err_alloc_etherdev:
2172 pci_release_regions(pdev);
2173err_pci_reg:
2174err_dma:
2175 pci_disable_device(pdev);
2176 return err;
2177}
2178
2179#ifdef CONFIG_PM
2180/**
2181 * i40evf_suspend - Power management suspend routine
2182 * @pdev: PCI device information struct
2183 * @state: unused
2184 *
2185 * Called when the system (VM) is entering sleep/suspend.
2186 **/
2187static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2188{
2189 struct net_device *netdev = pci_get_drvdata(pdev);
2190 struct i40evf_adapter *adapter = netdev_priv(netdev);
2191 int retval = 0;
2192
2193 netif_device_detach(netdev);
2194
2195 if (netif_running(netdev)) {
2196 rtnl_lock();
2197 i40evf_down(adapter);
2198 rtnl_unlock();
2199 }
2200 i40evf_free_misc_irq(adapter);
2201 i40evf_reset_interrupt_capability(adapter);
2202
2203 retval = pci_save_state(pdev);
2204 if (retval)
2205 return retval;
2206
2207 pci_disable_device(pdev);
2208
2209 return 0;
2210}
2211
2212/**
2213 * i40evf_resume - Power managment resume routine
2214 * @pdev: PCI device information struct
2215 *
2216 * Called when the system (VM) is resumed from sleep/suspend.
2217 **/
2218static int i40evf_resume(struct pci_dev *pdev)
2219{
2220 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2221 struct net_device *netdev = adapter->netdev;
2222 u32 err;
2223
2224 pci_set_power_state(pdev, PCI_D0);
2225 pci_restore_state(pdev);
2226 /* pci_restore_state clears dev->state_saved so call
2227 * pci_save_state to restore it.
2228 */
2229 pci_save_state(pdev);
2230
2231 err = pci_enable_device_mem(pdev);
2232 if (err) {
2233 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2234 return err;
2235 }
2236 pci_set_master(pdev);
2237
2238 rtnl_lock();
2239 err = i40evf_set_interrupt_capability(adapter);
2240 if (err) {
2241 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2242 return err;
2243 }
2244 err = i40evf_request_misc_irq(adapter);
2245 rtnl_unlock();
2246 if (err) {
2247 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2248 return err;
2249 }
2250
2251 schedule_work(&adapter->reset_task);
2252
2253 netif_device_attach(netdev);
2254
2255 return err;
2256}
2257
2258#endif /* CONFIG_PM */
2259/**
2260 * i40evf_remove - Device Removal Routine
2261 * @pdev: PCI device information struct
2262 *
2263 * i40evf_remove is called by the PCI subsystem to alert the driver
2264 * that it should release a PCI device. The could be caused by a
2265 * Hot-Plug event, or because the driver is going to be removed from
2266 * memory.
2267 **/
2268static void i40evf_remove(struct pci_dev *pdev)
2269{
2270 struct net_device *netdev = pci_get_drvdata(pdev);
2271 struct i40evf_adapter *adapter = netdev_priv(netdev);
2272 struct i40e_hw *hw = &adapter->hw;
2273
2274 cancel_delayed_work_sync(&adapter->init_task);
2275
2276 if (adapter->netdev_registered) {
2277 unregister_netdev(netdev);
2278 adapter->netdev_registered = false;
2279 }
2280 adapter->state = __I40EVF_REMOVE;
2281
2282 if (adapter->num_msix_vectors) {
2283 i40evf_misc_irq_disable(adapter);
2284 del_timer_sync(&adapter->watchdog_timer);
2285
2286 flush_scheduled_work();
2287
2288 i40evf_free_misc_irq(adapter);
2289
2290 i40evf_reset_interrupt_capability(adapter);
2291 }
2292
2293 if (hw->aq.asq.count)
2294 i40evf_shutdown_adminq(hw);
2295
2296 iounmap(hw->hw_addr);
2297 pci_release_regions(pdev);
2298
2299 i40evf_free_queues(adapter);
2300 kfree(adapter->vf_res);
2301
2302 free_netdev(netdev);
2303
2304 pci_disable_pcie_error_reporting(pdev);
2305
2306 pci_disable_device(pdev);
2307}
2308
2309static struct pci_driver i40evf_driver = {
2310 .name = i40evf_driver_name,
2311 .id_table = i40evf_pci_tbl,
2312 .probe = i40evf_probe,
2313 .remove = i40evf_remove,
2314#ifdef CONFIG_PM
2315 .suspend = i40evf_suspend,
2316 .resume = i40evf_resume,
2317#endif
2318 .shutdown = i40evf_shutdown,
2319};
2320
2321/**
2322 * i40e_init_module - Driver Registration Routine
2323 *
2324 * i40e_init_module is the first routine called when the driver is
2325 * loaded. All it does is register with the PCI subsystem.
2326 **/
2327static int __init i40evf_init_module(void)
2328{
2329 int ret;
2330 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2331 i40evf_driver_version);
2332
2333 pr_info("%s\n", i40evf_copyright);
2334
2335 ret = pci_register_driver(&i40evf_driver);
2336 return ret;
2337}
2338
2339module_init(i40evf_init_module);
2340
2341/**
2342 * i40e_exit_module - Driver Exit Cleanup Routine
2343 *
2344 * i40e_exit_module is called just before the driver is removed
2345 * from memory.
2346 **/
2347static void __exit i40evf_exit_module(void)
2348{
2349 pci_unregister_driver(&i40evf_driver);
2350}
2351
2352module_exit(i40evf_exit_module);
2353
2354/* i40evf_main.c */
Linux kernel - Deliverables
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