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i40e: support VF link state ndo
[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
2062862a 34#define DRV_VERSION "0.9.14"
5eae00c5
GR		 35const char i40evf_driver_version[] = DRV_VERSION;
36static const char i40evf_copyright[] =
673f2ebf 37 "Copyright (c) 2013 - 2014 Intel Corporation.";
5eae00c5
GR		 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++;
625777e3
MW		 170 dev_info(&adapter->pdev->dev, "TX timeout detected.\n");
171 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) {
172 dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
173 i40evf_request_reset(adapter);
174 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
175 schedule_work(&adapter->reset_task);
176 }
5eae00c5
GR		 177}
178
179/**
180 * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
181 * @adapter: board private structure
182 **/
183static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
184{
185 struct i40e_hw *hw = &adapter->hw;
186 wr32(hw, I40E_VFINT_DYN_CTL01, 0);
187
188 /* read flush */
189 rd32(hw, I40E_VFGEN_RSTAT);
190
191 synchronize_irq(adapter->msix_entries[0].vector);
192}
193
194/**
195 * i40evf_misc_irq_enable - Enable default interrupt generation settings
196 * @adapter: board private structure
197 **/
198static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
199{
200 struct i40e_hw *hw = &adapter->hw;
201 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
202 I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
203 wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA_ADMINQ_MASK);
204
205 /* read flush */
206 rd32(hw, I40E_VFGEN_RSTAT);
207}
208
209/**
210 * i40evf_irq_disable - Mask off interrupt generation on the NIC
211 * @adapter: board private structure
212 **/
213static void i40evf_irq_disable(struct i40evf_adapter *adapter)
214{
215 int i;
216 struct i40e_hw *hw = &adapter->hw;
217
dbb01c8a
MW		 218 if (!adapter->msix_entries)
219 return;
220
5eae00c5
GR		 221 for (i = 1; i < adapter->num_msix_vectors; i++) {
222 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
223 synchronize_irq(adapter->msix_entries[i].vector);
224 }
225 /* read flush */
226 rd32(hw, I40E_VFGEN_RSTAT);
227
228}
229
230/**
231 * i40evf_irq_enable_queues - Enable interrupt for specified queues
232 * @adapter: board private structure
233 * @mask: bitmap of queues to enable
234 **/
235void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
236{
237 struct i40e_hw *hw = &adapter->hw;
238 int i;
239
240 for (i = 1; i < adapter->num_msix_vectors; i++) {
241 if (mask & (1 << (i - 1))) {
242 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
243 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
244 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
245 }
246 }
247}
248
249/**
250 * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
251 * @adapter: board private structure
252 * @mask: bitmap of vectors to trigger
253 **/
254static void i40evf_fire_sw_int(struct i40evf_adapter *adapter,
255 u32 mask)
256{
257 struct i40e_hw *hw = &adapter->hw;
258 int i;
259 uint32_t dyn_ctl;
260
261 for (i = 1; i < adapter->num_msix_vectors; i++) {
262 if (mask & (1 << i)) {
263 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
264 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
265 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
266 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
267 }
268 }
269}
270
271/**
272 * i40evf_irq_enable - Enable default interrupt generation settings
273 * @adapter: board private structure
274 **/
275void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
276{
277 struct i40e_hw *hw = &adapter->hw;
278
279 i40evf_irq_enable_queues(adapter, ~0);
280
281 if (flush)
282 rd32(hw, I40E_VFGEN_RSTAT);
283}
284
285/**
286 * i40evf_msix_aq - Interrupt handler for vector 0
287 * @irq: interrupt number
288 * @data: pointer to netdev
289 **/
290static irqreturn_t i40evf_msix_aq(int irq, void *data)
291{
292 struct net_device *netdev = data;
293 struct i40evf_adapter *adapter = netdev_priv(netdev);
294 struct i40e_hw *hw = &adapter->hw;
295 u32 val;
296 u32 ena_mask;
297
298 /* handle non-queue interrupts */
299 val = rd32(hw, I40E_VFINT_ICR01);
300 ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
301
302
303 val = rd32(hw, I40E_VFINT_DYN_CTL01);
304 val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
305 wr32(hw, I40E_VFINT_DYN_CTL01, val);
306
307 /* re-enable interrupt causes */
308 wr32(hw, I40E_VFINT_ICR0_ENA1, ena_mask);
309 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK);
310
311 /* schedule work on the private workqueue */
312 schedule_work(&adapter->adminq_task);
313
314 return IRQ_HANDLED;
315}
316
317/**
318 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
319 * @irq: interrupt number
320 * @data: pointer to a q_vector
321 **/
322static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
323{
324 struct i40e_q_vector *q_vector = data;
325
326 if (!q_vector->tx.ring && !q_vector->rx.ring)
327 return IRQ_HANDLED;
328
329 napi_schedule(&q_vector->napi);
330
331 return IRQ_HANDLED;
332}
333
334/**
335 * i40evf_map_vector_to_rxq - associate irqs with rx queues
336 * @adapter: board private structure
337 * @v_idx: interrupt number
338 * @r_idx: queue number
339 **/
340static void
341i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
342{
343 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
344 struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
345
346 rx_ring->q_vector = q_vector;
347 rx_ring->next = q_vector->rx.ring;
348 rx_ring->vsi = &adapter->vsi;
349 q_vector->rx.ring = rx_ring;
350 q_vector->rx.count++;
351 q_vector->rx.latency_range = I40E_LOW_LATENCY;
352}
353
354/**
355 * i40evf_map_vector_to_txq - associate irqs with tx queues
356 * @adapter: board private structure
357 * @v_idx: interrupt number
358 * @t_idx: queue number
359 **/
360static void
361i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
362{
363 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
364 struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
365
366 tx_ring->q_vector = q_vector;
367 tx_ring->next = q_vector->tx.ring;
368 tx_ring->vsi = &adapter->vsi;
369 q_vector->tx.ring = tx_ring;
370 q_vector->tx.count++;
371 q_vector->tx.latency_range = I40E_LOW_LATENCY;
372 q_vector->num_ringpairs++;
373 q_vector->ring_mask |= (1 << t_idx);
374}
375
376/**
377 * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
378 * @adapter: board private structure to initialize
379 *
380 * This function maps descriptor rings to the queue-specific vectors
381 * we were allotted through the MSI-X enabling code. Ideally, we'd have
382 * one vector per ring/queue, but on a constrained vector budget, we
383 * group the rings as "efficiently" as possible. You would add new
384 * mapping configurations in here.
385 **/
386static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
387{
388 int q_vectors;
389 int v_start = 0;
390 int rxr_idx = 0, txr_idx = 0;
391 int rxr_remaining = adapter->vsi_res->num_queue_pairs;
392 int txr_remaining = adapter->vsi_res->num_queue_pairs;
393 int i, j;
394 int rqpv, tqpv;
395 int err = 0;
396
397 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
398
399 /* The ideal configuration...
400 * We have enough vectors to map one per queue.
401 */
402 if (q_vectors == (rxr_remaining * 2)) {
403 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
404 i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
405
406 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
407 i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
408 goto out;
409 }
410
411 /* If we don't have enough vectors for a 1-to-1
412 * mapping, we'll have to group them so there are
413 * multiple queues per vector.
414 * Re-adjusting *qpv takes care of the remainder.
415 */
416 for (i = v_start; i < q_vectors; i++) {
417 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
418 for (j = 0; j < rqpv; j++) {
419 i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
420 rxr_idx++;
421 rxr_remaining--;
422 }
423 }
424 for (i = v_start; i < q_vectors; i++) {
425 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
426 for (j = 0; j < tqpv; j++) {
427 i40evf_map_vector_to_txq(adapter, i, txr_idx);
428 txr_idx++;
429 txr_remaining--;
430 }
431 }
432
433out:
434 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
435
436 return err;
437}
438
439/**
440 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
441 * @adapter: board private structure
442 *
443 * Allocates MSI-X vectors for tx and rx handling, and requests
444 * interrupts from the kernel.
445 **/
446static int
447i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
448{
449 int vector, err, q_vectors;
450 int rx_int_idx = 0, tx_int_idx = 0;
451
452 i40evf_irq_disable(adapter);
453 /* Decrement for Other and TCP Timer vectors */
454 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
455
456 for (vector = 0; vector < q_vectors; vector++) {
457 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
458
459 if (q_vector->tx.ring && q_vector->rx.ring) {
460 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
461 "i40evf-%s-%s-%d", basename,
462 "TxRx", rx_int_idx++);
463 tx_int_idx++;
464 } else if (q_vector->rx.ring) {
465 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
466 "i40evf-%s-%s-%d", basename,
467 "rx", rx_int_idx++);
468 } else if (q_vector->tx.ring) {
469 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
470 "i40evf-%s-%s-%d", basename,
471 "tx", tx_int_idx++);
472 } else {
473 /* skip this unused q_vector */
474 continue;
475 }
476 err = request_irq(
477 adapter->msix_entries[vector + NONQ_VECS].vector,
478 i40evf_msix_clean_rings,
479 0,
480 q_vector->name,
481 q_vector);
482 if (err) {
483 dev_info(&adapter->pdev->dev,
484 "%s: request_irq failed, error: %d\n",
485 __func__, err);
486 goto free_queue_irqs;
487 }
488 /* assign the mask for this irq */
489 irq_set_affinity_hint(
490 adapter->msix_entries[vector + NONQ_VECS].vector,
491 q_vector->affinity_mask);
492 }
493
494 return 0;
495
496free_queue_irqs:
497 while (vector) {
498 vector--;
499 irq_set_affinity_hint(
500 adapter->msix_entries[vector + NONQ_VECS].vector,
501 NULL);
502 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
503 adapter->q_vector[vector]);
504 }
505 return err;
506}
507
508/**
509 * i40evf_request_misc_irq - Initialize MSI-X interrupts
510 * @adapter: board private structure
511 *
512 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
513 * vector is only for the admin queue, and stays active even when the netdev
514 * is closed.
515 **/
516static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
517{
518 struct net_device *netdev = adapter->netdev;
519 int err;
520
e1dfee8e 521 sprintf(adapter->misc_vector_name, "i40evf:mbx");
5eae00c5 522 err = request_irq(adapter->msix_entries[0].vector,
e1dfee8e
MW		 523 &i40evf_msix_aq, 0,
524 adapter->misc_vector_name, netdev);
5eae00c5
GR		 525 if (err) {
526 dev_err(&adapter->pdev->dev,
77fa28be
CS		 527 "request_irq for %s failed: %d\n",
528 adapter->misc_vector_name, err);
5eae00c5
GR		 529 free_irq(adapter->msix_entries[0].vector, netdev);
530 }
531 return err;
532}
533
534/**
535 * i40evf_free_traffic_irqs - Free MSI-X interrupts
536 * @adapter: board private structure
537 *
538 * Frees all MSI-X vectors other than 0.
539 **/
540static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
541{
542 int i;
543 int q_vectors;
544 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
545
546 for (i = 0; i < q_vectors; i++) {
547 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
548 NULL);
549 free_irq(adapter->msix_entries[i+1].vector,
550 adapter->q_vector[i]);
551 }
552}
553
554/**
555 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
556 * @adapter: board private structure
557 *
558 * Frees MSI-X vector 0.
559 **/
560static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
561{
562 struct net_device *netdev = adapter->netdev;
563
564 free_irq(adapter->msix_entries[0].vector, netdev);
565}
566
567/**
568 * i40evf_configure_tx - Configure Transmit Unit after Reset
569 * @adapter: board private structure
570 *
571 * Configure the Tx unit of the MAC after a reset.
572 **/
573static void i40evf_configure_tx(struct i40evf_adapter *adapter)
574{
575 struct i40e_hw *hw = &adapter->hw;
576 int i;
577 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
578 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
579}
580
581/**
582 * i40evf_configure_rx - Configure Receive Unit after Reset
583 * @adapter: board private structure
584 *
585 * Configure the Rx unit of the MAC after a reset.
586 **/
587static void i40evf_configure_rx(struct i40evf_adapter *adapter)
588{
589 struct i40e_hw *hw = &adapter->hw;
590 struct net_device *netdev = adapter->netdev;
591 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
592 int i;
593 int rx_buf_len;
594
595
596 adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
597 adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
598
599 /* Decide whether to use packet split mode or not */
600 if (netdev->mtu > ETH_DATA_LEN) {
601 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
602 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
603 else
604 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
605 } else {
606 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
607 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
608 else
609 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
610 }
611
612 /* Set the RX buffer length according to the mode */
613 if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
614 rx_buf_len = I40E_RX_HDR_SIZE;
615 } else {
616 if (netdev->mtu <= ETH_DATA_LEN)
617 rx_buf_len = I40EVF_RXBUFFER_2048;
618 else
619 rx_buf_len = ALIGN(max_frame, 1024);
620 }
621
622 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
623 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
624 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
625 }
626}
627
628/**
629 * i40evf_find_vlan - Search filter list for specific vlan filter
630 * @adapter: board private structure
631 * @vlan: vlan tag
632 *
633 * Returns ptr to the filter object or NULL
634 **/
635static struct
636i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
637{
638 struct i40evf_vlan_filter *f;
639
640 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
641 if (vlan == f->vlan)
642 return f;
643 }
644 return NULL;
645}
646
647/**
648 * i40evf_add_vlan - Add a vlan filter to the list
649 * @adapter: board private structure
650 * @vlan: VLAN tag
651 *
652 * Returns ptr to the filter object or NULL when no memory available.
653 **/
654static struct
655i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
656{
657 struct i40evf_vlan_filter *f;
658
659 f = i40evf_find_vlan(adapter, vlan);
660 if (NULL == f) {
661 f = kzalloc(sizeof(*f), GFP_ATOMIC);
662 if (NULL == f) {
663 dev_info(&adapter->pdev->dev,
664 "%s: no memory for new VLAN filter\n",
665 __func__);
666 return NULL;
667 }
668 f->vlan = vlan;
669
670 INIT_LIST_HEAD(&f->list);
671 list_add(&f->list, &adapter->vlan_filter_list);
672 f->add = true;
673 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
674 }
675
676 return f;
677}
678
679/**
680 * i40evf_del_vlan - Remove a vlan filter from the list
681 * @adapter: board private structure
682 * @vlan: VLAN tag
683 **/
684static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
685{
686 struct i40evf_vlan_filter *f;
687
688 f = i40evf_find_vlan(adapter, vlan);
689 if (f) {
690 f->remove = true;
691 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
692 }
693 return;
694}
695
696/**
697 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
698 * @netdev: network device struct
699 * @vid: VLAN tag
700 **/
701static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
702 __always_unused __be16 proto, u16 vid)
703{
704 struct i40evf_adapter *adapter = netdev_priv(netdev);
705
706 if (i40evf_add_vlan(adapter, vid) == NULL)
707 return -ENOMEM;
708 return 0;
709}
710
711/**
712 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
713 * @netdev: network device struct
714 * @vid: VLAN tag
715 **/
716static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
717 __always_unused __be16 proto, u16 vid)
718{
719 struct i40evf_adapter *adapter = netdev_priv(netdev);
720
721 i40evf_del_vlan(adapter, vid);
722 return 0;
723}
724
725/**
726 * i40evf_find_filter - Search filter list for specific mac filter
727 * @adapter: board private structure
728 * @macaddr: the MAC address
729 *
730 * Returns ptr to the filter object or NULL
731 **/
732static struct
733i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
734 u8 *macaddr)
735{
736 struct i40evf_mac_filter *f;
737
738 if (!macaddr)
739 return NULL;
740
741 list_for_each_entry(f, &adapter->mac_filter_list, list) {
742 if (ether_addr_equal(macaddr, f->macaddr))
743 return f;
744 }
745 return NULL;
746}
747
748/**
749 * i40e_add_filter - Add a mac filter to the filter list
750 * @adapter: board private structure
751 * @macaddr: the MAC address
752 *
753 * Returns ptr to the filter object or NULL when no memory available.
754 **/
755static struct
756i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
757 u8 *macaddr)
758{
759 struct i40evf_mac_filter *f;
760
761 if (!macaddr)
762 return NULL;
763
764 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
765 &adapter->crit_section))
766 mdelay(1);
767
768 f = i40evf_find_filter(adapter, macaddr);
769 if (NULL == f) {
770 f = kzalloc(sizeof(*f), GFP_ATOMIC);
771 if (NULL == f) {
772 dev_info(&adapter->pdev->dev,
773 "%s: no memory for new filter\n", __func__);
774 clear_bit(__I40EVF_IN_CRITICAL_TASK,
775 &adapter->crit_section);
776 return NULL;
777 }
778
779 memcpy(f->macaddr, macaddr, ETH_ALEN);
780
781 list_add(&f->list, &adapter->mac_filter_list);
782 f->add = true;
783 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
784 }
785
786 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
787 return f;
788}
789
790/**
791 * i40evf_set_mac - NDO callback to set port mac address
792 * @netdev: network interface device structure
793 * @p: pointer to an address structure
794 *
795 * Returns 0 on success, negative on failure
796 **/
797static int i40evf_set_mac(struct net_device *netdev, void *p)
798{
799 struct i40evf_adapter *adapter = netdev_priv(netdev);
800 struct i40e_hw *hw = &adapter->hw;
801 struct i40evf_mac_filter *f;
802 struct sockaddr *addr = p;
803
804 if (!is_valid_ether_addr(addr->sa_data))
805 return -EADDRNOTAVAIL;
806
807 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
808 return 0;
809
810 f = i40evf_add_filter(adapter, addr->sa_data);
811 if (f) {
812 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
813 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
814 netdev->addr_len);
815 }
816
817 return (f == NULL) ? -ENOMEM : 0;
818}
819
820/**
821 * i40evf_set_rx_mode - NDO callback to set the netdev filters
822 * @netdev: network interface device structure
823 **/
824static void i40evf_set_rx_mode(struct net_device *netdev)
825{
826 struct i40evf_adapter *adapter = netdev_priv(netdev);
827 struct i40evf_mac_filter *f, *ftmp;
828 struct netdev_hw_addr *uca;
829 struct netdev_hw_addr *mca;
830
831 /* add addr if not already in the filter list */
832 netdev_for_each_uc_addr(uca, netdev) {
833 i40evf_add_filter(adapter, uca->addr);
834 }
835 netdev_for_each_mc_addr(mca, netdev) {
836 i40evf_add_filter(adapter, mca->addr);
837 }
838
839 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
840 &adapter->crit_section))
841 mdelay(1);
842 /* remove filter if not in netdev list */
843 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
844 bool found = false;
845
846 if (f->macaddr[0] & 0x01) {
847 netdev_for_each_mc_addr(mca, netdev) {
848 if (ether_addr_equal(mca->addr, f->macaddr)) {
849 found = true;
850 break;
851 }
852 }
853 } else {
854 netdev_for_each_uc_addr(uca, netdev) {
855 if (ether_addr_equal(uca->addr, f->macaddr)) {
856 found = true;
857 break;
858 }
859 }
860 }
861 if (found) {
862 f->remove = true;
863 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
864 }
865 }
866 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
867}
868
869/**
870 * i40evf_napi_enable_all - enable NAPI on all queue vectors
871 * @adapter: board private structure
872 **/
873static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
874{
875 int q_idx;
876 struct i40e_q_vector *q_vector;
877 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
878
879 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
880 struct napi_struct *napi;
881 q_vector = adapter->q_vector[q_idx];
882 napi = &q_vector->napi;
883 napi_enable(napi);
884 }
885}
886
887/**
888 * i40evf_napi_disable_all - disable NAPI on all queue vectors
889 * @adapter: board private structure
890 **/
891static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
892{
893 int q_idx;
894 struct i40e_q_vector *q_vector;
895 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
896
897 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
898 q_vector = adapter->q_vector[q_idx];
899 napi_disable(&q_vector->napi);
900 }
901}
902
903/**
904 * i40evf_configure - set up transmit and receive data structures
905 * @adapter: board private structure
906 **/
907static void i40evf_configure(struct i40evf_adapter *adapter)
908{
909 struct net_device *netdev = adapter->netdev;
910 int i;
911
912 i40evf_set_rx_mode(netdev);
913
914 i40evf_configure_tx(adapter);
915 i40evf_configure_rx(adapter);
916 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
917
918 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
919 struct i40e_ring *ring = adapter->rx_rings[i];
920 i40evf_alloc_rx_buffers(ring, ring->count);
921 ring->next_to_use = ring->count - 1;
922 writel(ring->next_to_use, ring->tail);
923 }
924}
925
926/**
927 * i40evf_up_complete - Finish the last steps of bringing up a connection
928 * @adapter: board private structure
929 **/
930static int i40evf_up_complete(struct i40evf_adapter *adapter)
931{
932 adapter->state = __I40EVF_RUNNING;
933 clear_bit(__I40E_DOWN, &adapter->vsi.state);
934
935 i40evf_napi_enable_all(adapter);
936
937 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
938 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
939 return 0;
940}
941
942/**
943 * i40evf_clean_all_rx_rings - Free Rx Buffers for all queues
944 * @adapter: board private structure
945 **/
946static void i40evf_clean_all_rx_rings(struct i40evf_adapter *adapter)
947{
948 int i;
949
950 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
951 i40evf_clean_rx_ring(adapter->rx_rings[i]);
952}
953
954/**
955 * i40evf_clean_all_tx_rings - Free Tx Buffers for all queues
956 * @adapter: board private structure
957 **/
958static void i40evf_clean_all_tx_rings(struct i40evf_adapter *adapter)
959{
960 int i;
961
962 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
963 i40evf_clean_tx_ring(adapter->tx_rings[i]);
964}
965
966/**
967 * i40e_down - Shutdown the connection processing
968 * @adapter: board private structure
969 **/
970void i40evf_down(struct i40evf_adapter *adapter)
971{
972 struct net_device *netdev = adapter->netdev;
973 struct i40evf_mac_filter *f;
974
ef8693eb 975 /* remove all MAC filters */
5eae00c5
GR		 976 list_for_each_entry(f, &adapter->mac_filter_list, list) {
977 f->remove = true;
978 }
ed1f5b58
MW		 979 /* remove all VLAN filters */
980 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
981 f->remove = true;
982 }
ef8693eb
MW		 983 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
984 adapter->state != __I40EVF_RESETTING) {
985 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
ed1f5b58 986 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
ef8693eb
MW		 987 /* disable receives */
988 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
989 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
990 msleep(20);
991 }
5eae00c5
GR		 992 netif_tx_disable(netdev);
993
994 netif_tx_stop_all_queues(netdev);
995
996 i40evf_irq_disable(adapter);
997
998 i40evf_napi_disable_all(adapter);
999
1000 netif_carrier_off(netdev);
1001
1002 i40evf_clean_all_tx_rings(adapter);
1003 i40evf_clean_all_rx_rings(adapter);
1004}
1005
1006/**
1007 * i40evf_acquire_msix_vectors - Setup the MSIX capability
1008 * @adapter: board private structure
1009 * @vectors: number of vectors to request
1010 *
1011 * Work with the OS to set up the MSIX vectors needed.
1012 *
1013 * Returns 0 on success, negative on failure
1014 **/
1015static int
1016i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1017{
1018 int err, vector_threshold;
1019
1020 /* We'll want at least 3 (vector_threshold):
1021 * 0) Other (Admin Queue and link, mostly)
1022 * 1) TxQ[0] Cleanup
1023 * 2) RxQ[0] Cleanup
1024 */
1025 vector_threshold = MIN_MSIX_COUNT;
1026
1027 /* The more we get, the more we will assign to Tx/Rx Cleanup
1028 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1029 * Right now, we simply care about how many we'll get; we'll
1030 * set them up later while requesting irq's.
1031 */
1032 while (vectors >= vector_threshold) {
1033 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
1034 vectors);
1035 if (!err) /* Success in acquiring all requested vectors. */
1036 break;
1037 else if (err < 0)
1038 vectors = 0; /* Nasty failure, quit now */
1039 else /* err == number of vectors we should try again with */
1040 vectors = err;
1041 }
1042
1043 if (vectors < vector_threshold) {
1044 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts.\n");
1045 kfree(adapter->msix_entries);
1046 adapter->msix_entries = NULL;
1047 err = -EIO;
1048 } else {
1049 /* Adjust for only the vectors we'll use, which is minimum
1050 * of max_msix_q_vectors + NONQ_VECS, or the number of
1051 * vectors we were allocated.
1052 */
1053 adapter->num_msix_vectors = vectors;
1054 }
1055 return err;
1056}
1057
1058/**
1059 * i40evf_free_queues - Free memory for all rings
1060 * @adapter: board private structure to initialize
1061 *
1062 * Free all of the memory associated with queue pairs.
1063 **/
1064static void i40evf_free_queues(struct i40evf_adapter *adapter)
1065{
1066 int i;
1067
1068 if (!adapter->vsi_res)
1069 return;
1070 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1071 if (adapter->tx_rings[i])
1072 kfree_rcu(adapter->tx_rings[i], rcu);
1073 adapter->tx_rings[i] = NULL;
1074 adapter->rx_rings[i] = NULL;
1075 }
1076}
1077
1078/**
1079 * i40evf_alloc_queues - Allocate memory for all rings
1080 * @adapter: board private structure to initialize
1081 *
1082 * We allocate one ring per queue at run-time since we don't know the
1083 * number of queues at compile-time. The polling_netdev array is
1084 * intended for Multiqueue, but should work fine with a single queue.
1085 **/
1086static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1087{
1088 int i;
1089
1090 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1091 struct i40e_ring *tx_ring;
1092 struct i40e_ring *rx_ring;
1093
1094 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
1095 if (!tx_ring)
1096 goto err_out;
1097
1098 tx_ring->queue_index = i;
1099 tx_ring->netdev = adapter->netdev;
1100 tx_ring->dev = &adapter->pdev->dev;
1101 tx_ring->count = I40EVF_DEFAULT_TXD;
1102 adapter->tx_rings[i] = tx_ring;
1103
1104 rx_ring = &tx_ring[1];
1105 rx_ring->queue_index = i;
1106 rx_ring->netdev = adapter->netdev;
1107 rx_ring->dev = &adapter->pdev->dev;
1108 rx_ring->count = I40EVF_DEFAULT_RXD;
1109 adapter->rx_rings[i] = rx_ring;
1110 }
1111
1112 return 0;
1113
1114err_out:
1115 i40evf_free_queues(adapter);
1116 return -ENOMEM;
1117}
1118
1119/**
1120 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1121 * @adapter: board private structure to initialize
1122 *
1123 * Attempt to configure the interrupts using the best available
1124 * capabilities of the hardware and the kernel.
1125 **/
1126static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1127{
1128 int vector, v_budget;
1129 int pairs = 0;
1130 int err = 0;
1131
1132 if (!adapter->vsi_res) {
1133 err = -EIO;
1134 goto out;
1135 }
1136 pairs = adapter->vsi_res->num_queue_pairs;
1137
1138 /* It's easy to be greedy for MSI-X vectors, but it really
1139 * doesn't do us much good if we have a lot more vectors
1140 * than CPU's. So let's be conservative and only ask for
1141 * (roughly) twice the number of vectors as there are CPU's.
1142 */
1143 v_budget = min(pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
9347eb77 1144 v_budget = min(v_budget, (int)adapter->vf_res->max_vectors);
5eae00c5
GR		 1145
1146 /* A failure in MSI-X entry allocation isn't fatal, but it does
1147 * mean we disable MSI-X capabilities of the adapter.
1148 */
1149 adapter->msix_entries = kcalloc(v_budget,
1150 sizeof(struct msix_entry), GFP_KERNEL);
1151 if (!adapter->msix_entries) {
1152 err = -ENOMEM;
1153 goto out;
1154 }
1155
1156 for (vector = 0; vector < v_budget; vector++)
1157 adapter->msix_entries[vector].entry = vector;
1158
1159 i40evf_acquire_msix_vectors(adapter, v_budget);
1160
1161out:
1162 adapter->netdev->real_num_tx_queues = pairs;
1163 return err;
1164}
1165
1166/**
1167 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1168 * @adapter: board private structure to initialize
1169 *
1170 * We allocate one q_vector per queue interrupt. If allocation fails we
1171 * return -ENOMEM.
1172 **/
1173static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1174{
1175 int q_idx, num_q_vectors;
1176 struct i40e_q_vector *q_vector;
1177
1178 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1179
1180 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1181 q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
1182 if (!q_vector)
1183 goto err_out;
1184 q_vector->adapter = adapter;
1185 q_vector->vsi = &adapter->vsi;
1186 q_vector->v_idx = q_idx;
1187 netif_napi_add(adapter->netdev, &q_vector->napi,
1188 i40evf_napi_poll, 64);
1189 adapter->q_vector[q_idx] = q_vector;
1190 }
1191
1192 return 0;
1193
1194err_out:
1195 while (q_idx) {
1196 q_idx--;
1197 q_vector = adapter->q_vector[q_idx];
1198 netif_napi_del(&q_vector->napi);
1199 kfree(q_vector);
1200 adapter->q_vector[q_idx] = NULL;
1201 }
1202 return -ENOMEM;
1203}
1204
1205/**
1206 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1207 * @adapter: board private structure to initialize
1208 *
1209 * This function frees the memory allocated to the q_vectors. In addition if
1210 * NAPI is enabled it will delete any references to the NAPI struct prior
1211 * to freeing the q_vector.
1212 **/
1213static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1214{
1215 int q_idx, num_q_vectors;
1216 int napi_vectors;
1217
1218 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1219 napi_vectors = adapter->vsi_res->num_queue_pairs;
1220
1221 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1222 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1223
1224 adapter->q_vector[q_idx] = NULL;
1225 if (q_idx < napi_vectors)
1226 netif_napi_del(&q_vector->napi);
1227 kfree(q_vector);
1228 }
1229}
1230
1231/**
1232 * i40evf_reset_interrupt_capability - Reset MSIX setup
1233 * @adapter: board private structure
1234 *
1235 **/
1236void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1237{
1238 pci_disable_msix(adapter->pdev);
1239 kfree(adapter->msix_entries);
1240 adapter->msix_entries = NULL;
1241
1242 return;
1243}
1244
1245/**
1246 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1247 * @adapter: board private structure to initialize
1248 *
1249 **/
1250int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1251{
1252 int err;
1253
1254 err = i40evf_set_interrupt_capability(adapter);
1255 if (err) {
1256 dev_err(&adapter->pdev->dev,
1257 "Unable to setup interrupt capabilities\n");
1258 goto err_set_interrupt;
1259 }
1260
1261 err = i40evf_alloc_q_vectors(adapter);
1262 if (err) {
1263 dev_err(&adapter->pdev->dev,
1264 "Unable to allocate memory for queue vectors\n");
1265 goto err_alloc_q_vectors;
1266 }
1267
1268 err = i40evf_alloc_queues(adapter);
1269 if (err) {
1270 dev_err(&adapter->pdev->dev,
1271 "Unable to allocate memory for queues\n");
1272 goto err_alloc_queues;
1273 }
1274
1275 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1276 (adapter->vsi_res->num_queue_pairs > 1) ? "Enabled" :
1277 "Disabled", adapter->vsi_res->num_queue_pairs);
1278
1279 return 0;
1280err_alloc_queues:
1281 i40evf_free_q_vectors(adapter);
1282err_alloc_q_vectors:
1283 i40evf_reset_interrupt_capability(adapter);
1284err_set_interrupt:
1285 return err;
1286}
1287
1288/**
1289 * i40evf_watchdog_timer - Periodic call-back timer
1290 * @data: pointer to adapter disguised as unsigned long
1291 **/
1292static void i40evf_watchdog_timer(unsigned long data)
1293{
1294 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1295 schedule_work(&adapter->watchdog_task);
1296 /* timer will be rescheduled in watchdog task */
1297}
1298
1299/**
1300 * i40evf_watchdog_task - Periodic call-back task
1301 * @work: pointer to work_struct
1302 **/
1303static void i40evf_watchdog_task(struct work_struct *work)
1304{
1305 struct i40evf_adapter *adapter = container_of(work,
1306 struct i40evf_adapter,
1307 watchdog_task);
1308 struct i40e_hw *hw = &adapter->hw;
1309
ef8693eb
MW		 1310 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1311 goto restart_watchdog;
1312
1313 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1314 dev_info(&adapter->pdev->dev, "Checking for redemption\n");
1315 if ((rd32(hw, I40E_VFGEN_RSTAT) & 0x3) == I40E_VFR_VFACTIVE) {
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;
5eae00c5 1333 goto watchdog_done;
ef8693eb 1334 }
5eae00c5 1335
ef8693eb
MW		 1336 if ((adapter->state < __I40EVF_DOWN) ||
1337 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
5eae00c5
GR		 1338 goto watchdog_done;
1339
ef8693eb
MW		 1340 /* check for reset */
1341 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
5eae00c5
GR		 1342 (rd32(hw, I40E_VFGEN_RSTAT) & 0x3) != I40E_VFR_VFACTIVE) {
1343 adapter->state = __I40EVF_RESETTING;
ef8693eb
MW		 1344 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1345 dev_err(&adapter->pdev->dev, "Hardware reset detected.\n");
1346 dev_info(&adapter->pdev->dev, "Scheduling reset task\n");
5eae00c5 1347 schedule_work(&adapter->reset_task);
ef8693eb
MW		 1348 adapter->aq_pending = 0;
1349 adapter->aq_required = 0;
1350 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 1351 goto watchdog_done;
1352 }
1353
1354 /* Process admin queue tasks. After init, everything gets done
1355 * here so we don't race on the admin queue.
1356 */
1357 if (adapter->aq_pending)
1358 goto watchdog_done;
1359
1360 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1361 i40evf_map_queues(adapter);
1362 goto watchdog_done;
1363 }
1364
1365 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1366 i40evf_add_ether_addrs(adapter);
1367 goto watchdog_done;
1368 }
1369
1370 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1371 i40evf_add_vlans(adapter);
1372 goto watchdog_done;
1373 }
1374
1375 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1376 i40evf_del_ether_addrs(adapter);
1377 goto watchdog_done;
1378 }
1379
1380 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1381 i40evf_del_vlans(adapter);
1382 goto watchdog_done;
1383 }
1384
1385 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1386 i40evf_disable_queues(adapter);
1387 goto watchdog_done;
1388 }
1389
1390 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1391 i40evf_configure_queues(adapter);
1392 goto watchdog_done;
1393 }
1394
1395 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1396 i40evf_enable_queues(adapter);
1397 goto watchdog_done;
1398 }
1399
1400 if (adapter->state == __I40EVF_RUNNING)
1401 i40evf_request_stats(adapter);
1402
1403 i40evf_irq_enable(adapter, true);
1404 i40evf_fire_sw_int(adapter, 0xFF);
ef8693eb 1405
5eae00c5 1406watchdog_done:
ef8693eb
MW		 1407 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1408restart_watchdog:
5eae00c5
GR		 1409 if (adapter->aq_required)
1410 mod_timer(&adapter->watchdog_timer,
1411 jiffies + msecs_to_jiffies(20));
1412 else
1413 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
5eae00c5
GR		 1414 schedule_work(&adapter->adminq_task);
1415}
1416
1417/**
1418 * i40evf_configure_rss - Prepare for RSS if used
1419 * @adapter: board private structure
1420 **/
1421static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1422{
1423 struct i40e_hw *hw = &adapter->hw;
1424 u32 lut = 0;
1425 int i, j;
1426 u64 hena;
1427
1428 /* Set of random keys generated using kernel random number generator */
1429 static const u32 seed[I40E_VFQF_HKEY_MAX_INDEX + 1] = {
1430 0x794221b4, 0xbca0c5ab, 0x6cd5ebd9, 0x1ada6127,
1431 0x983b3aa1, 0x1c4e71eb, 0x7f6328b2, 0xfcdc0da0,
1432 0xc135cafa, 0x7a6f7e2d, 0xe7102d28, 0x163cd12e,
1433 0x4954b126 };
1434
1435 /* Hash type is configured by the PF - we just supply the key */
1436
1437 /* Fill out hash function seed */
1438 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1439 wr32(hw, I40E_VFQF_HKEY(i), seed[i]);
1440
1441 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1442 hena = I40E_DEFAULT_RSS_HENA;
1443 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1444 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1445
1446 /* Populate the LUT with max no. of queues in round robin fashion */
1447 for (i = 0, j = 0; i < I40E_VFQF_HLUT_MAX_INDEX; i++, j++) {
1448 if (j == adapter->vsi_res->num_queue_pairs)
1449 j = 0;
1450 /* lut = 4-byte sliding window of 4 lut entries */
1451 lut = (lut << 8) | (j &
1452 ((0x1 << 8) - 1));
1453 /* On i = 3, we have 4 entries in lut; write to the register */
1454 if ((i & 3) == 3)
1455 wr32(hw, I40E_VFQF_HLUT(i >> 2), lut);
1456 }
1457 i40e_flush(hw);
1458}
1459
ef8693eb
MW		 1460#define I40EVF_RESET_WAIT_MS 100
1461#define I40EVF_RESET_WAIT_COUNT 200
5eae00c5
GR		 1462/**
1463 * i40evf_reset_task - Call-back task to handle hardware reset
1464 * @work: pointer to work_struct
1465 *
1466 * During reset we need to shut down and reinitialize the admin queue
1467 * before we can use it to communicate with the PF again. We also clear
1468 * and reinit the rings because that context is lost as well.
1469 **/
1470static void i40evf_reset_task(struct work_struct *work)
1471{
ef8693eb
MW		 1472 struct i40evf_adapter *adapter = container_of(work,
1473 struct i40evf_adapter,
1474 reset_task);
5eae00c5
GR		 1475 struct i40e_hw *hw = &adapter->hw;
1476 int i = 0, err;
1477 uint32_t rstat_val;
1478
1479 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1480 &adapter->crit_section))
1481 udelay(500);
ef8693eb
MW		 1482 /* poll until we see the reset actually happen */
1483 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1484 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1485 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1486 if (rstat_val != I40E_VFR_VFACTIVE) {
1487 dev_info(&adapter->pdev->dev, "Reset now occurring\n");
1488 break;
1489 } else {
1490 msleep(I40EVF_RESET_WAIT_MS);
1491 }
1492 }
1493 if (i == I40EVF_RESET_WAIT_COUNT) {
1494 dev_err(&adapter->pdev->dev, "Reset was not detected\n");
1495 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1496 goto continue_reset; /* act like the reset happened */
1497 }
5eae00c5 1498
ef8693eb
MW		 1499 /* wait until the reset is complete and the PF is responding to us */
1500 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
5eae00c5
GR		 1501 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1502 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
ef8693eb
MW		 1503 if (rstat_val == I40E_VFR_VFACTIVE) {
1504 dev_info(&adapter->pdev->dev, "Reset is complete. Reinitializing.\n");
5eae00c5 1505 break;
ef8693eb
MW		 1506 } else {
1507 msleep(I40EVF_RESET_WAIT_MS);
1508 }
5eae00c5 1509 }
ef8693eb 1510 if (i == I40EVF_RESET_WAIT_COUNT) {
5eae00c5 1511 /* reset never finished */
ef8693eb
MW		 1512 dev_err(&adapter->pdev->dev, "Reset never finished (%x). PF driver is dead, and so am I.\n",
1513 rstat_val);
1514 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1515
1516 if (netif_running(adapter->netdev))
1517 i40evf_close(adapter->netdev);
1518
1519 i40evf_free_misc_irq(adapter);
1520 i40evf_reset_interrupt_capability(adapter);
1521 i40evf_free_queues(adapter);
1522 kfree(adapter->vf_res);
1523 i40evf_shutdown_adminq(hw);
1524 adapter->netdev->flags &= ~IFF_UP;
1525 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1526 return; /* Do not attempt to reinit. It's dead, Jim. */
5eae00c5 1527 }
ef8693eb
MW		 1528
1529continue_reset:
1530 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1531
5eae00c5
GR		 1532 i40evf_down(adapter);
1533 adapter->state = __I40EVF_RESETTING;
1534
1535 /* kill and reinit the admin queue */
1536 if (i40evf_shutdown_adminq(hw))
1537 dev_warn(&adapter->pdev->dev,
1538 "%s: Failed to destroy the Admin Queue resources\n",
1539 __func__);
1540 err = i40evf_init_adminq(hw);
1541 if (err)
1542 dev_info(&adapter->pdev->dev, "%s: init_adminq failed: %d\n",
1543 __func__, err);
1544
1545 adapter->aq_pending = 0;
1546 adapter->aq_required = 0;
1547 i40evf_map_queues(adapter);
1548 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1549
1550 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1551
1552 if (netif_running(adapter->netdev)) {
1553 /* allocate transmit descriptors */
1554 err = i40evf_setup_all_tx_resources(adapter);
1555 if (err)
1556 goto reset_err;
1557
1558 /* allocate receive descriptors */
1559 err = i40evf_setup_all_rx_resources(adapter);
1560 if (err)
1561 goto reset_err;
1562
1563 i40evf_configure(adapter);
1564
1565 err = i40evf_up_complete(adapter);
1566 if (err)
1567 goto reset_err;
1568
1569 i40evf_irq_enable(adapter, true);
1570 }
1571 return;
1572reset_err:
1573 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit.\n");
1574 i40evf_close(adapter->netdev);
1575}
1576
1577/**
1578 * i40evf_adminq_task - worker thread to clean the admin queue
1579 * @work: pointer to work_struct containing our data
1580 **/
1581static void i40evf_adminq_task(struct work_struct *work)
1582{
1583 struct i40evf_adapter *adapter =
1584 container_of(work, struct i40evf_adapter, adminq_task);
1585 struct i40e_hw *hw = &adapter->hw;
1586 struct i40e_arq_event_info event;
1587 struct i40e_virtchnl_msg *v_msg;
1588 i40e_status ret;
1589 u16 pending;
1590
ef8693eb
MW		 1591 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1592 return;
1593
5eae00c5
GR		 1594 event.msg_size = I40EVF_MAX_AQ_BUF_SIZE;
1595 event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
1596 if (!event.msg_buf) {
1597 dev_info(&adapter->pdev->dev, "%s: no memory for ARQ clean\n",
1598 __func__);
1599 return;
1600 }
1601 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1602 do {
1603 ret = i40evf_clean_arq_element(hw, &event, &pending);
1604 if (ret)
1605 break; /* No event to process or error cleaning ARQ */
1606
1607 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1608 v_msg->v_retval, event.msg_buf,
1609 event.msg_size);
1610 if (pending != 0) {
1611 dev_info(&adapter->pdev->dev,
1612 "%s: ARQ: Pending events %d\n",
1613 __func__, pending);
1614 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1615 }
1616 } while (pending);
1617
1618 /* re-enable Admin queue interrupt cause */
1619 i40evf_misc_irq_enable(adapter);
1620
1621 kfree(event.msg_buf);
1622}
1623
1624/**
1625 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1626 * @adapter: board private structure
1627 *
1628 * Free all transmit software resources
1629 **/
1630static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1631{
1632 int i;
1633
1634 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1635 if (adapter->tx_rings[i]->desc)
1636 i40evf_free_tx_resources(adapter->tx_rings[i]);
1637
1638}
1639
1640/**
1641 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1642 * @adapter: board private structure
1643 *
1644 * If this function returns with an error, then it's possible one or
1645 * more of the rings is populated (while the rest are not). It is the
1646 * callers duty to clean those orphaned rings.
1647 *
1648 * Return 0 on success, negative on failure
1649 **/
1650static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1651{
1652 int i, err = 0;
1653
1654 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1655 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1656 if (!err)
1657 continue;
1658 dev_err(&adapter->pdev->dev,
1659 "%s: Allocation for Tx Queue %u failed\n",
1660 __func__, i);
1661 break;
1662 }
1663
1664 return err;
1665}
1666
1667/**
1668 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1669 * @adapter: board private structure
1670 *
1671 * If this function returns with an error, then it's possible one or
1672 * more of the rings is populated (while the rest are not). It is the
1673 * callers duty to clean those orphaned rings.
1674 *
1675 * Return 0 on success, negative on failure
1676 **/
1677static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1678{
1679 int i, err = 0;
1680
1681 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1682 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1683 if (!err)
1684 continue;
1685 dev_err(&adapter->pdev->dev,
1686 "%s: Allocation for Rx Queue %u failed\n",
1687 __func__, i);
1688 break;
1689 }
1690 return err;
1691}
1692
1693/**
1694 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1695 * @adapter: board private structure
1696 *
1697 * Free all receive software resources
1698 **/
1699static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1700{
1701 int i;
1702
1703 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1704 if (adapter->rx_rings[i]->desc)
1705 i40evf_free_rx_resources(adapter->rx_rings[i]);
1706}
1707
1708/**
1709 * i40evf_open - Called when a network interface is made active
1710 * @netdev: network interface device structure
1711 *
1712 * Returns 0 on success, negative value on failure
1713 *
1714 * The open entry point is called when a network interface is made
1715 * active by the system (IFF_UP). At this point all resources needed
1716 * for transmit and receive operations are allocated, the interrupt
1717 * handler is registered with the OS, the watchdog timer is started,
1718 * and the stack is notified that the interface is ready.
1719 **/
1720static int i40evf_open(struct net_device *netdev)
1721{
1722 struct i40evf_adapter *adapter = netdev_priv(netdev);
1723 int err;
1724
ef8693eb
MW		 1725 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1726 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1727 return -EIO;
1728 }
5eae00c5
GR		 1729 if (adapter->state != __I40EVF_DOWN)
1730 return -EBUSY;
1731
1732 /* allocate transmit descriptors */
1733 err = i40evf_setup_all_tx_resources(adapter);
1734 if (err)
1735 goto err_setup_tx;
1736
1737 /* allocate receive descriptors */
1738 err = i40evf_setup_all_rx_resources(adapter);
1739 if (err)
1740 goto err_setup_rx;
1741
1742 /* clear any pending interrupts, may auto mask */
1743 err = i40evf_request_traffic_irqs(adapter, netdev->name);
1744 if (err)
1745 goto err_req_irq;
1746
1747 i40evf_configure(adapter);
1748
1749 err = i40evf_up_complete(adapter);
1750 if (err)
1751 goto err_req_irq;
1752
1753 i40evf_irq_enable(adapter, true);
1754
1755 return 0;
1756
1757err_req_irq:
1758 i40evf_down(adapter);
1759 i40evf_free_traffic_irqs(adapter);
1760err_setup_rx:
1761 i40evf_free_all_rx_resources(adapter);
1762err_setup_tx:
1763 i40evf_free_all_tx_resources(adapter);
1764
1765 return err;
1766}
1767
1768/**
1769 * i40evf_close - Disables a network interface
1770 * @netdev: network interface device structure
1771 *
1772 * Returns 0, this is not allowed to fail
1773 *
1774 * The close entry point is called when an interface is de-activated
1775 * by the OS. The hardware is still under the drivers control, but
1776 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1777 * are freed, along with all transmit and receive resources.
1778 **/
1779static int i40evf_close(struct net_device *netdev)
1780{
1781 struct i40evf_adapter *adapter = netdev_priv(netdev);
1782
ef8693eb
MW		 1783 if (adapter->state <= __I40EVF_DOWN)
1784 return 0;
1785
5eae00c5
GR		 1786 /* signal that we are down to the interrupt handler */
1787 adapter->state = __I40EVF_DOWN;
ef8693eb 1788
5eae00c5
GR		 1789 set_bit(__I40E_DOWN, &adapter->vsi.state);
1790
1791 i40evf_down(adapter);
1792 i40evf_free_traffic_irqs(adapter);
1793
1794 i40evf_free_all_tx_resources(adapter);
1795 i40evf_free_all_rx_resources(adapter);
1796
1797 return 0;
1798}
1799
1800/**
1801 * i40evf_get_stats - Get System Network Statistics
1802 * @netdev: network interface device structure
1803 *
1804 * Returns the address of the device statistics structure.
1805 * The statistics are actually updated from the timer callback.
1806 **/
1807static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1808{
1809 struct i40evf_adapter *adapter = netdev_priv(netdev);
1810
1811 /* only return the current stats */
1812 return &adapter->net_stats;
1813}
1814
1815/**
1816 * i40evf_reinit_locked - Software reinit
1817 * @adapter: board private structure
1818 *
1819 * Reinititalizes the ring structures in response to a software configuration
1820 * change. Roughly the same as close followed by open, but skips releasing
1821 * and reallocating the interrupts.
1822 **/
1823void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1824{
1825 struct net_device *netdev = adapter->netdev;
1826 int err;
1827
1828 WARN_ON(in_interrupt());
1829
1830 adapter->state = __I40EVF_RESETTING;
1831
1832 i40evf_down(adapter);
1833
1834 /* allocate transmit descriptors */
1835 err = i40evf_setup_all_tx_resources(adapter);
1836 if (err)
1837 goto err_reinit;
1838
1839 /* allocate receive descriptors */
1840 err = i40evf_setup_all_rx_resources(adapter);
1841 if (err)
1842 goto err_reinit;
1843
1844 i40evf_configure(adapter);
1845
1846 err = i40evf_up_complete(adapter);
1847 if (err)
1848 goto err_reinit;
1849
1850 i40evf_irq_enable(adapter, true);
1851 return;
1852
1853err_reinit:
1854 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit.\n");
1855 i40evf_close(netdev);
1856}
1857
1858/**
1859 * i40evf_change_mtu - Change the Maximum Transfer Unit
1860 * @netdev: network interface device structure
1861 * @new_mtu: new value for maximum frame size
1862 *
1863 * Returns 0 on success, negative on failure
1864 **/
1865static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1866{
1867 struct i40evf_adapter *adapter = netdev_priv(netdev);
1868 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1869
1870 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1871 return -EINVAL;
1872
1873 /* must set new MTU before calling down or up */
1874 netdev->mtu = new_mtu;
1875 i40evf_reinit_locked(adapter);
1876 return 0;
1877}
1878
1879static const struct net_device_ops i40evf_netdev_ops = {
1880 .ndo_open = i40evf_open,
1881 .ndo_stop = i40evf_close,
1882 .ndo_start_xmit = i40evf_xmit_frame,
1883 .ndo_get_stats = i40evf_get_stats,
1884 .ndo_set_rx_mode = i40evf_set_rx_mode,
1885 .ndo_validate_addr = eth_validate_addr,
1886 .ndo_set_mac_address = i40evf_set_mac,
1887 .ndo_change_mtu = i40evf_change_mtu,
1888 .ndo_tx_timeout = i40evf_tx_timeout,
1889 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
1890 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
1891};
1892
1893/**
1894 * i40evf_check_reset_complete - check that VF reset is complete
1895 * @hw: pointer to hw struct
1896 *
1897 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1898 **/
1899static int i40evf_check_reset_complete(struct i40e_hw *hw)
1900{
1901 u32 rstat;
1902 int i;
1903
1904 for (i = 0; i < 100; i++) {
1905 rstat = rd32(hw, I40E_VFGEN_RSTAT);
1906 if (rstat == I40E_VFR_VFACTIVE)
1907 return 0;
1908 udelay(10);
1909 }
1910 return -EBUSY;
1911}
1912
1913/**
1914 * i40evf_init_task - worker thread to perform delayed initialization
1915 * @work: pointer to work_struct containing our data
1916 *
1917 * This task completes the work that was begun in probe. Due to the nature
1918 * of VF-PF communications, we may need to wait tens of milliseconds to get
1919 * reponses back from the PF. Rather than busy-wait in probe and bog down the
1920 * whole system, we'll do it in a task so we can sleep.
1921 * This task only runs during driver init. Once we've established
1922 * communications with the PF driver and set up our netdev, the watchdog
1923 * takes over.
1924 **/
1925static void i40evf_init_task(struct work_struct *work)
1926{
1927 struct i40evf_adapter *adapter = container_of(work,
1928 struct i40evf_adapter,
1929 init_task.work);
1930 struct net_device *netdev = adapter->netdev;
1931 struct i40evf_mac_filter *f;
1932 struct i40e_hw *hw = &adapter->hw;
1933 struct pci_dev *pdev = adapter->pdev;
1934 int i, err, bufsz;
1935
1936 switch (adapter->state) {
1937 case __I40EVF_STARTUP:
1938 /* driver loaded, probe complete */
ef8693eb
MW		 1939 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1940 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
5eae00c5
GR		 1941 err = i40e_set_mac_type(hw);
1942 if (err) {
c2a137cb
MW		 1943 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
1944 err);
5eae00c5
GR		 1945 goto err;
1946 }
1947 err = i40evf_check_reset_complete(hw);
1948 if (err) {
c2a137cb
MW		 1949 dev_err(&pdev->dev, "Device is still in reset (%d)\n",
1950 err);
5eae00c5
GR		 1951 goto err;
1952 }
1953 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
1954 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
1955 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1956 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1957
1958 err = i40evf_init_adminq(hw);
1959 if (err) {
c2a137cb
MW		 1960 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
1961 err);
5eae00c5
GR		 1962 goto err;
1963 }
1964 err = i40evf_send_api_ver(adapter);
1965 if (err) {
c2a137cb
MW		 1966 dev_err(&pdev->dev, "Unable to send to PF (%d)\n",
1967 err);
5eae00c5
GR		 1968 i40evf_shutdown_adminq(hw);
1969 goto err;
1970 }
1971 adapter->state = __I40EVF_INIT_VERSION_CHECK;
1972 goto restart;
1973 break;
1974 case __I40EVF_INIT_VERSION_CHECK:
1975 if (!i40evf_asq_done(hw))
1976 goto err;
1977
1978 /* aq msg sent, awaiting reply */
1979 err = i40evf_verify_api_ver(adapter);
1980 if (err) {
c2a137cb 1981 dev_err(&pdev->dev, "Unable to verify API version (%d)\n",
5eae00c5
GR		 1982 err);
1983 goto err;
1984 }
1985 err = i40evf_send_vf_config_msg(adapter);
1986 if (err) {
c2a137cb 1987 dev_err(&pdev->dev, "Unable send config request (%d)\n",
5eae00c5
GR		 1988 err);
1989 goto err;
1990 }
1991 adapter->state = __I40EVF_INIT_GET_RESOURCES;
1992 goto restart;
1993 break;
1994 case __I40EVF_INIT_GET_RESOURCES:
1995 /* aq msg sent, awaiting reply */
1996 if (!adapter->vf_res) {
1997 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
1998 (I40E_MAX_VF_VSI *
1999 sizeof(struct i40e_virtchnl_vsi_resource));
2000 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
c2a137cb 2001 if (!adapter->vf_res)
5eae00c5 2002 goto err;
5eae00c5
GR		 2003 }
2004 err = i40evf_get_vf_config(adapter);
2005 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2006 goto restart;
2007 if (err) {
c2a137cb
MW		 2008 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2009 err);
5eae00c5
GR		 2010 goto err_alloc;
2011 }
2012 adapter->state = __I40EVF_INIT_SW;
2013 break;
2014 default:
2015 goto err_alloc;
2016 }
2017 /* got VF config message back from PF, now we can parse it */
2018 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2019 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2020 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2021 }
2022 if (!adapter->vsi_res) {
c2a137cb 2023 dev_err(&pdev->dev, "No LAN VSI found\n");
5eae00c5
GR		 2024 goto err_alloc;
2025 }
2026
2027 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2028
5eae00c5
GR		 2029 netdev->netdev_ops = &i40evf_netdev_ops;
2030 i40evf_set_ethtool_ops(netdev);
2031 netdev->watchdog_timeo = 5 * HZ;
dbbd8111
MW		 2032 netdev->features |= NETIF_F_HIGHDMA |
2033 NETIF_F_SG |
5eae00c5
GR		 2034 NETIF_F_IP_CSUM |
2035 NETIF_F_SCTP_CSUM |
2036 NETIF_F_IPV6_CSUM |
2037 NETIF_F_TSO |
2038 NETIF_F_TSO6 |
3415e8ce 2039 NETIF_F_RXCSUM |
5eae00c5
GR		 2040 NETIF_F_GRO;
2041
2042 if (adapter->vf_res->vf_offload_flags
2043 & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2044 netdev->vlan_features = netdev->features;
2045 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2046 NETIF_F_HW_VLAN_CTAG_RX |
2047 NETIF_F_HW_VLAN_CTAG_FILTER;
2048 }
2049
3415e8ce
GR		 2050 /* copy netdev features into list of user selectable features */
2051 netdev->hw_features |= netdev->features;
2052 netdev->hw_features &= ~NETIF_F_RXCSUM;
2053
5eae00c5 2054 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
c2a137cb
MW		 2055 dev_info(&pdev->dev, "Invalid MAC address %pMAC, using random\n",
2056 adapter->hw.mac.addr);
5eae00c5
GR		 2057 random_ether_addr(adapter->hw.mac.addr);
2058 }
2059 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
2060 memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
2061
2062 INIT_LIST_HEAD(&adapter->mac_filter_list);
2063 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2064 f = kzalloc(sizeof(*f), GFP_ATOMIC);
2065 if (NULL == f)
2066 goto err_sw_init;
2067
2068 memcpy(f->macaddr, adapter->hw.mac.addr, ETH_ALEN);
2069 f->add = true;
2070 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2071
2072 list_add(&f->list, &adapter->mac_filter_list);
2073
2074 init_timer(&adapter->watchdog_timer);
2075 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2076 adapter->watchdog_timer.data = (unsigned long)adapter;
2077 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2078
2079 err = i40evf_init_interrupt_scheme(adapter);
2080 if (err)
2081 goto err_sw_init;
2082 i40evf_map_rings_to_vectors(adapter);
2083 i40evf_configure_rss(adapter);
2084 err = i40evf_request_misc_irq(adapter);
2085 if (err)
2086 goto err_sw_init;
2087
2088 netif_carrier_off(netdev);
2089
5eae00c5
GR		 2090 adapter->vsi.id = adapter->vsi_res->vsi_id;
2091 adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2092 adapter->vsi.back = adapter;
2093 adapter->vsi.base_vector = 1;
2094 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2095 adapter->vsi.rx_itr_setting = I40E_ITR_DYNAMIC;
2096 adapter->vsi.tx_itr_setting = I40E_ITR_DYNAMIC;
2097 adapter->vsi.netdev = adapter->netdev;
2098
ef8693eb
MW		 2099 if (!adapter->netdev_registered) {
2100 err = register_netdev(netdev);
2101 if (err)
2102 goto err_register;
2103 }
5eae00c5
GR		 2104
2105 adapter->netdev_registered = true;
2106
2107 netif_tx_stop_all_queues(netdev);
2108
2109 dev_info(&pdev->dev, "MAC address: %pMAC\n", adapter->hw.mac.addr);
2110 if (netdev->features & NETIF_F_GRO)
2111 dev_info(&pdev->dev, "GRO is enabled\n");
2112
2113 dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2114 adapter->state = __I40EVF_DOWN;
2115 set_bit(__I40E_DOWN, &adapter->vsi.state);
2116 i40evf_misc_irq_enable(adapter);
2117 return;
2118restart:
2119 schedule_delayed_work(&adapter->init_task,
2120 msecs_to_jiffies(50));
2121 return;
2122
2123err_register:
2124 i40evf_free_misc_irq(adapter);
2125err_sw_init:
2126 i40evf_reset_interrupt_capability(adapter);
5eae00c5
GR		 2127err_alloc:
2128 kfree(adapter->vf_res);
2129 adapter->vf_res = NULL;
2130err:
ef8693eb
MW		 2131 if (hw->aq.asq.count)
2132 i40evf_shutdown_adminq(hw); /* ignore error */
5eae00c5
GR		 2133 /* Things went into the weeds, so try again later */
2134 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2135 dev_err(&pdev->dev, "Failed to communicate with PF; giving up.\n");
ef8693eb 2136 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
5eae00c5
GR		 2137 return; /* do not reschedule */
2138 }
2139 schedule_delayed_work(&adapter->init_task, HZ * 3);
2140 return;
2141}
2142
2143/**
2144 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2145 * @pdev: pci device structure
2146 **/
2147static void i40evf_shutdown(struct pci_dev *pdev)
2148{
2149 struct net_device *netdev = pci_get_drvdata(pdev);
2150
2151 netif_device_detach(netdev);
2152
2153 if (netif_running(netdev))
2154 i40evf_close(netdev);
2155
2156#ifdef CONFIG_PM
2157 pci_save_state(pdev);
2158
2159#endif
2160 pci_disable_device(pdev);
2161}
2162
2163/**
2164 * i40evf_probe - Device Initialization Routine
2165 * @pdev: PCI device information struct
2166 * @ent: entry in i40evf_pci_tbl
2167 *
2168 * Returns 0 on success, negative on failure
2169 *
2170 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2171 * The OS initialization, configuring of the adapter private structure,
2172 * and a hardware reset occur.
2173 **/
2174static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2175{
2176 struct net_device *netdev;
2177 struct i40evf_adapter *adapter = NULL;
2178 struct i40e_hw *hw = NULL;
dbbd8111 2179 int err;
5eae00c5
GR		 2180
2181 err = pci_enable_device(pdev);
2182 if (err)
2183 return err;
2184
6494294f
MW		 2185 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2186 if (err)
2187 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2188 if (err) {
2189 dev_err(&pdev->dev,
2190 "DMA configuration failed: 0x%x\n", err);
5eae00c5
GR		 2191 goto err_dma;
2192 }
2193
2194 err = pci_request_regions(pdev, i40evf_driver_name);
2195 if (err) {
2196 dev_err(&pdev->dev,
2197 "pci_request_regions failed 0x%x\n", err);
2198 goto err_pci_reg;
2199 }
2200
2201 pci_enable_pcie_error_reporting(pdev);
2202
2203 pci_set_master(pdev);
2204
2205 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2206 MAX_TX_QUEUES);
2207 if (!netdev) {
2208 err = -ENOMEM;
2209 goto err_alloc_etherdev;
2210 }
2211
2212 SET_NETDEV_DEV(netdev, &pdev->dev);
2213
2214 pci_set_drvdata(pdev, netdev);
2215 adapter = netdev_priv(netdev);
5eae00c5
GR		 2216
2217 adapter->netdev = netdev;
2218 adapter->pdev = pdev;
2219
2220 hw = &adapter->hw;
2221 hw->back = adapter;
2222
2223 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2224 adapter->state = __I40EVF_STARTUP;
2225
2226 /* Call save state here because it relies on the adapter struct. */
2227 pci_save_state(pdev);
2228
2229 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2230 pci_resource_len(pdev, 0));
2231 if (!hw->hw_addr) {
2232 err = -EIO;
2233 goto err_ioremap;
2234 }
2235 hw->vendor_id = pdev->vendor;
2236 hw->device_id = pdev->device;
2237 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2238 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2239 hw->subsystem_device_id = pdev->subsystem_device;
2240 hw->bus.device = PCI_SLOT(pdev->devfn);
2241 hw->bus.func = PCI_FUNC(pdev->devfn);
2242
2243 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2244 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2245 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2246 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2247 schedule_delayed_work(&adapter->init_task, 10);
2248
2249 return 0;
2250
2251err_ioremap:
2252 free_netdev(netdev);
2253err_alloc_etherdev:
2254 pci_release_regions(pdev);
2255err_pci_reg:
2256err_dma:
2257 pci_disable_device(pdev);
2258 return err;
2259}
2260
2261#ifdef CONFIG_PM
2262/**
2263 * i40evf_suspend - Power management suspend routine
2264 * @pdev: PCI device information struct
2265 * @state: unused
2266 *
2267 * Called when the system (VM) is entering sleep/suspend.
2268 **/
2269static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2270{
2271 struct net_device *netdev = pci_get_drvdata(pdev);
2272 struct i40evf_adapter *adapter = netdev_priv(netdev);
2273 int retval = 0;
2274
2275 netif_device_detach(netdev);
2276
2277 if (netif_running(netdev)) {
2278 rtnl_lock();
2279 i40evf_down(adapter);
2280 rtnl_unlock();
2281 }
2282 i40evf_free_misc_irq(adapter);
2283 i40evf_reset_interrupt_capability(adapter);
2284
2285 retval = pci_save_state(pdev);
2286 if (retval)
2287 return retval;
2288
2289 pci_disable_device(pdev);
2290
2291 return 0;
2292}
2293
2294/**
2295 * i40evf_resume - Power managment resume routine
2296 * @pdev: PCI device information struct
2297 *
2298 * Called when the system (VM) is resumed from sleep/suspend.
2299 **/
2300static int i40evf_resume(struct pci_dev *pdev)
2301{
2302 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2303 struct net_device *netdev = adapter->netdev;
2304 u32 err;
2305
2306 pci_set_power_state(pdev, PCI_D0);
2307 pci_restore_state(pdev);
2308 /* pci_restore_state clears dev->state_saved so call
2309 * pci_save_state to restore it.
2310 */
2311 pci_save_state(pdev);
2312
2313 err = pci_enable_device_mem(pdev);
2314 if (err) {
2315 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2316 return err;
2317 }
2318 pci_set_master(pdev);
2319
2320 rtnl_lock();
2321 err = i40evf_set_interrupt_capability(adapter);
2322 if (err) {
2323 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2324 return err;
2325 }
2326 err = i40evf_request_misc_irq(adapter);
2327 rtnl_unlock();
2328 if (err) {
2329 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2330 return err;
2331 }
2332
2333 schedule_work(&adapter->reset_task);
2334
2335 netif_device_attach(netdev);
2336
2337 return err;
2338}
2339
2340#endif /* CONFIG_PM */
2341/**
2342 * i40evf_remove - Device Removal Routine
2343 * @pdev: PCI device information struct
2344 *
2345 * i40evf_remove is called by the PCI subsystem to alert the driver
2346 * that it should release a PCI device. The could be caused by a
2347 * Hot-Plug event, or because the driver is going to be removed from
2348 * memory.
2349 **/
2350static void i40evf_remove(struct pci_dev *pdev)
2351{
2352 struct net_device *netdev = pci_get_drvdata(pdev);
2353 struct i40evf_adapter *adapter = netdev_priv(netdev);
2354 struct i40e_hw *hw = &adapter->hw;
2355
2356 cancel_delayed_work_sync(&adapter->init_task);
ef8693eb 2357 cancel_work_sync(&adapter->reset_task);
5eae00c5
GR		 2358
2359 if (adapter->netdev_registered) {
2360 unregister_netdev(netdev);
2361 adapter->netdev_registered = false;
2362 }
2363 adapter->state = __I40EVF_REMOVE;
2364
dbb01c8a 2365 if (adapter->msix_entries) {
5eae00c5 2366 i40evf_misc_irq_disable(adapter);
5eae00c5 2367 i40evf_free_misc_irq(adapter);
5eae00c5
GR		 2368 i40evf_reset_interrupt_capability(adapter);
2369 }
2370
dbb01c8a
MW		 2371 del_timer_sync(&adapter->watchdog_timer);
2372 flush_scheduled_work();
2373
5eae00c5
GR		 2374 if (hw->aq.asq.count)
2375 i40evf_shutdown_adminq(hw);
2376
2377 iounmap(hw->hw_addr);
2378 pci_release_regions(pdev);
2379
2380 i40evf_free_queues(adapter);
2381 kfree(adapter->vf_res);
2382
2383 free_netdev(netdev);
2384
2385 pci_disable_pcie_error_reporting(pdev);
2386
2387 pci_disable_device(pdev);
2388}
2389
2390static struct pci_driver i40evf_driver = {
2391 .name = i40evf_driver_name,
2392 .id_table = i40evf_pci_tbl,
2393 .probe = i40evf_probe,
2394 .remove = i40evf_remove,
2395#ifdef CONFIG_PM
2396 .suspend = i40evf_suspend,
2397 .resume = i40evf_resume,
2398#endif
2399 .shutdown = i40evf_shutdown,
2400};
2401
2402/**
2403 * i40e_init_module - Driver Registration Routine
2404 *
2405 * i40e_init_module is the first routine called when the driver is
2406 * loaded. All it does is register with the PCI subsystem.
2407 **/
2408static int __init i40evf_init_module(void)
2409{
2410 int ret;
2411 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2412 i40evf_driver_version);
2413
2414 pr_info("%s\n", i40evf_copyright);
2415
2416 ret = pci_register_driver(&i40evf_driver);
2417 return ret;
2418}
2419
2420module_init(i40evf_init_module);
2421
2422/**
2423 * i40e_exit_module - Driver Exit Cleanup Routine
2424 *
2425 * i40e_exit_module is called just before the driver is removed
2426 * from memory.
2427 **/
2428static void __exit i40evf_exit_module(void)
2429{
2430 pci_unregister_driver(&i40evf_driver);
2431}
2432
2433module_exit(i40evf_exit_module);
2434
2435/* i40evf_main.c */
Linux kernel - Deliverables
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