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i40e/i40evf: Bump build versions
[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
b98d1df2 34#define DRV_VERSION "0.9.21"
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)) {
3526d800 172 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
625777e3
MW		 173 schedule_work(&adapter->reset_task);
174 }
5eae00c5
GR		 175}
176
177/**
178 * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
179 * @adapter: board private structure
180 **/
181static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
182{
183 struct i40e_hw *hw = &adapter->hw;
184 wr32(hw, I40E_VFINT_DYN_CTL01, 0);
185
186 /* read flush */
187 rd32(hw, I40E_VFGEN_RSTAT);
188
189 synchronize_irq(adapter->msix_entries[0].vector);
190}
191
192/**
193 * i40evf_misc_irq_enable - Enable default interrupt generation settings
194 * @adapter: board private structure
195 **/
196static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
197{
198 struct i40e_hw *hw = &adapter->hw;
199 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
200 I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
201 wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA_ADMINQ_MASK);
202
203 /* read flush */
204 rd32(hw, I40E_VFGEN_RSTAT);
205}
206
207/**
208 * i40evf_irq_disable - Mask off interrupt generation on the NIC
209 * @adapter: board private structure
210 **/
211static void i40evf_irq_disable(struct i40evf_adapter *adapter)
212{
213 int i;
214 struct i40e_hw *hw = &adapter->hw;
215
dbb01c8a
MW		 216 if (!adapter->msix_entries)
217 return;
218
5eae00c5
GR		 219 for (i = 1; i < adapter->num_msix_vectors; i++) {
220 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
221 synchronize_irq(adapter->msix_entries[i].vector);
222 }
223 /* read flush */
224 rd32(hw, I40E_VFGEN_RSTAT);
225
226}
227
228/**
229 * i40evf_irq_enable_queues - Enable interrupt for specified queues
230 * @adapter: board private structure
231 * @mask: bitmap of queues to enable
232 **/
233void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
234{
235 struct i40e_hw *hw = &adapter->hw;
236 int i;
237
238 for (i = 1; i < adapter->num_msix_vectors; i++) {
239 if (mask & (1 << (i - 1))) {
240 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
241 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
242 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
243 }
244 }
245}
246
247/**
248 * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
249 * @adapter: board private structure
250 * @mask: bitmap of vectors to trigger
251 **/
252static void i40evf_fire_sw_int(struct i40evf_adapter *adapter,
253 u32 mask)
254{
255 struct i40e_hw *hw = &adapter->hw;
256 int i;
257 uint32_t dyn_ctl;
258
259 for (i = 1; i < adapter->num_msix_vectors; i++) {
260 if (mask & (1 << i)) {
261 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
262 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
263 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
264 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
265 }
266 }
267}
268
269/**
270 * i40evf_irq_enable - Enable default interrupt generation settings
271 * @adapter: board private structure
272 **/
273void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
274{
275 struct i40e_hw *hw = &adapter->hw;
276
277 i40evf_irq_enable_queues(adapter, ~0);
278
279 if (flush)
280 rd32(hw, I40E_VFGEN_RSTAT);
281}
282
283/**
284 * i40evf_msix_aq - Interrupt handler for vector 0
285 * @irq: interrupt number
286 * @data: pointer to netdev
287 **/
288static irqreturn_t i40evf_msix_aq(int irq, void *data)
289{
290 struct net_device *netdev = data;
291 struct i40evf_adapter *adapter = netdev_priv(netdev);
292 struct i40e_hw *hw = &adapter->hw;
293 u32 val;
294 u32 ena_mask;
295
296 /* handle non-queue interrupts */
297 val = rd32(hw, I40E_VFINT_ICR01);
298 ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
299
300
301 val = rd32(hw, I40E_VFINT_DYN_CTL01);
302 val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
303 wr32(hw, I40E_VFINT_DYN_CTL01, val);
304
305 /* re-enable interrupt causes */
306 wr32(hw, I40E_VFINT_ICR0_ENA1, ena_mask);
307 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK);
308
309 /* schedule work on the private workqueue */
310 schedule_work(&adapter->adminq_task);
311
312 return IRQ_HANDLED;
313}
314
315/**
316 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
317 * @irq: interrupt number
318 * @data: pointer to a q_vector
319 **/
320static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
321{
322 struct i40e_q_vector *q_vector = data;
323
324 if (!q_vector->tx.ring && !q_vector->rx.ring)
325 return IRQ_HANDLED;
326
327 napi_schedule(&q_vector->napi);
328
329 return IRQ_HANDLED;
330}
331
332/**
333 * i40evf_map_vector_to_rxq - associate irqs with rx queues
334 * @adapter: board private structure
335 * @v_idx: interrupt number
336 * @r_idx: queue number
337 **/
338static void
339i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
340{
341 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
342 struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
343
344 rx_ring->q_vector = q_vector;
345 rx_ring->next = q_vector->rx.ring;
346 rx_ring->vsi = &adapter->vsi;
347 q_vector->rx.ring = rx_ring;
348 q_vector->rx.count++;
349 q_vector->rx.latency_range = I40E_LOW_LATENCY;
350}
351
352/**
353 * i40evf_map_vector_to_txq - associate irqs with tx queues
354 * @adapter: board private structure
355 * @v_idx: interrupt number
356 * @t_idx: queue number
357 **/
358static void
359i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
360{
361 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
362 struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
363
364 tx_ring->q_vector = q_vector;
365 tx_ring->next = q_vector->tx.ring;
366 tx_ring->vsi = &adapter->vsi;
367 q_vector->tx.ring = tx_ring;
368 q_vector->tx.count++;
369 q_vector->tx.latency_range = I40E_LOW_LATENCY;
370 q_vector->num_ringpairs++;
371 q_vector->ring_mask |= (1 << t_idx);
372}
373
374/**
375 * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
376 * @adapter: board private structure to initialize
377 *
378 * This function maps descriptor rings to the queue-specific vectors
379 * we were allotted through the MSI-X enabling code. Ideally, we'd have
380 * one vector per ring/queue, but on a constrained vector budget, we
381 * group the rings as "efficiently" as possible. You would add new
382 * mapping configurations in here.
383 **/
384static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
385{
386 int q_vectors;
387 int v_start = 0;
388 int rxr_idx = 0, txr_idx = 0;
389 int rxr_remaining = adapter->vsi_res->num_queue_pairs;
390 int txr_remaining = adapter->vsi_res->num_queue_pairs;
391 int i, j;
392 int rqpv, tqpv;
393 int err = 0;
394
395 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
396
397 /* The ideal configuration...
398 * We have enough vectors to map one per queue.
399 */
400 if (q_vectors == (rxr_remaining * 2)) {
401 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
402 i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
403
404 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
405 i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
406 goto out;
407 }
408
409 /* If we don't have enough vectors for a 1-to-1
410 * mapping, we'll have to group them so there are
411 * multiple queues per vector.
412 * Re-adjusting *qpv takes care of the remainder.
413 */
414 for (i = v_start; i < q_vectors; i++) {
415 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
416 for (j = 0; j < rqpv; j++) {
417 i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
418 rxr_idx++;
419 rxr_remaining--;
420 }
421 }
422 for (i = v_start; i < q_vectors; i++) {
423 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
424 for (j = 0; j < tqpv; j++) {
425 i40evf_map_vector_to_txq(adapter, i, txr_idx);
426 txr_idx++;
427 txr_remaining--;
428 }
429 }
430
431out:
432 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
433
434 return err;
435}
436
437/**
438 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
439 * @adapter: board private structure
440 *
441 * Allocates MSI-X vectors for tx and rx handling, and requests
442 * interrupts from the kernel.
443 **/
444static int
445i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
446{
447 int vector, err, q_vectors;
448 int rx_int_idx = 0, tx_int_idx = 0;
449
450 i40evf_irq_disable(adapter);
451 /* Decrement for Other and TCP Timer vectors */
452 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
453
454 for (vector = 0; vector < q_vectors; vector++) {
455 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
456
457 if (q_vector->tx.ring && q_vector->rx.ring) {
458 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
459 "i40evf-%s-%s-%d", basename,
460 "TxRx", rx_int_idx++);
461 tx_int_idx++;
462 } else if (q_vector->rx.ring) {
463 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
464 "i40evf-%s-%s-%d", basename,
465 "rx", rx_int_idx++);
466 } else if (q_vector->tx.ring) {
467 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
468 "i40evf-%s-%s-%d", basename,
469 "tx", tx_int_idx++);
470 } else {
471 /* skip this unused q_vector */
472 continue;
473 }
474 err = request_irq(
475 adapter->msix_entries[vector + NONQ_VECS].vector,
476 i40evf_msix_clean_rings,
477 0,
478 q_vector->name,
479 q_vector);
480 if (err) {
481 dev_info(&adapter->pdev->dev,
482 "%s: request_irq failed, error: %d\n",
483 __func__, err);
484 goto free_queue_irqs;
485 }
486 /* assign the mask for this irq */
487 irq_set_affinity_hint(
488 adapter->msix_entries[vector + NONQ_VECS].vector,
489 q_vector->affinity_mask);
490 }
491
492 return 0;
493
494free_queue_irqs:
495 while (vector) {
496 vector--;
497 irq_set_affinity_hint(
498 adapter->msix_entries[vector + NONQ_VECS].vector,
499 NULL);
500 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
501 adapter->q_vector[vector]);
502 }
503 return err;
504}
505
506/**
507 * i40evf_request_misc_irq - Initialize MSI-X interrupts
508 * @adapter: board private structure
509 *
510 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
511 * vector is only for the admin queue, and stays active even when the netdev
512 * is closed.
513 **/
514static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
515{
516 struct net_device *netdev = adapter->netdev;
517 int err;
518
e1dfee8e 519 sprintf(adapter->misc_vector_name, "i40evf:mbx");
5eae00c5 520 err = request_irq(adapter->msix_entries[0].vector,
e1dfee8e
MW		 521 &i40evf_msix_aq, 0,
522 adapter->misc_vector_name, netdev);
5eae00c5
GR		 523 if (err) {
524 dev_err(&adapter->pdev->dev,
77fa28be
CS		 525 "request_irq for %s failed: %d\n",
526 adapter->misc_vector_name, err);
5eae00c5
GR		 527 free_irq(adapter->msix_entries[0].vector, netdev);
528 }
529 return err;
530}
531
532/**
533 * i40evf_free_traffic_irqs - Free MSI-X interrupts
534 * @adapter: board private structure
535 *
536 * Frees all MSI-X vectors other than 0.
537 **/
538static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
539{
540 int i;
541 int q_vectors;
542 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
543
544 for (i = 0; i < q_vectors; i++) {
545 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
546 NULL);
547 free_irq(adapter->msix_entries[i+1].vector,
548 adapter->q_vector[i]);
549 }
550}
551
552/**
553 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
554 * @adapter: board private structure
555 *
556 * Frees MSI-X vector 0.
557 **/
558static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
559{
560 struct net_device *netdev = adapter->netdev;
561
562 free_irq(adapter->msix_entries[0].vector, netdev);
563}
564
565/**
566 * i40evf_configure_tx - Configure Transmit Unit after Reset
567 * @adapter: board private structure
568 *
569 * Configure the Tx unit of the MAC after a reset.
570 **/
571static void i40evf_configure_tx(struct i40evf_adapter *adapter)
572{
573 struct i40e_hw *hw = &adapter->hw;
574 int i;
575 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
576 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
577}
578
579/**
580 * i40evf_configure_rx - Configure Receive Unit after Reset
581 * @adapter: board private structure
582 *
583 * Configure the Rx unit of the MAC after a reset.
584 **/
585static void i40evf_configure_rx(struct i40evf_adapter *adapter)
586{
587 struct i40e_hw *hw = &adapter->hw;
588 struct net_device *netdev = adapter->netdev;
589 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
590 int i;
591 int rx_buf_len;
592
593
594 adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
595 adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
596
597 /* Decide whether to use packet split mode or not */
598 if (netdev->mtu > ETH_DATA_LEN) {
599 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
600 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
601 else
602 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
603 } else {
604 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
605 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
606 else
607 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
608 }
609
610 /* Set the RX buffer length according to the mode */
611 if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
612 rx_buf_len = I40E_RX_HDR_SIZE;
613 } else {
614 if (netdev->mtu <= ETH_DATA_LEN)
615 rx_buf_len = I40EVF_RXBUFFER_2048;
616 else
617 rx_buf_len = ALIGN(max_frame, 1024);
618 }
619
620 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
621 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
622 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
623 }
624}
625
626/**
627 * i40evf_find_vlan - Search filter list for specific vlan filter
628 * @adapter: board private structure
629 * @vlan: vlan tag
630 *
631 * Returns ptr to the filter object or NULL
632 **/
633static struct
634i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
635{
636 struct i40evf_vlan_filter *f;
637
638 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
639 if (vlan == f->vlan)
640 return f;
641 }
642 return NULL;
643}
644
645/**
646 * i40evf_add_vlan - Add a vlan filter to the list
647 * @adapter: board private structure
648 * @vlan: VLAN tag
649 *
650 * Returns ptr to the filter object or NULL when no memory available.
651 **/
652static struct
653i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
654{
655 struct i40evf_vlan_filter *f;
656
657 f = i40evf_find_vlan(adapter, vlan);
658 if (NULL == f) {
659 f = kzalloc(sizeof(*f), GFP_ATOMIC);
660 if (NULL == f) {
661 dev_info(&adapter->pdev->dev,
662 "%s: no memory for new VLAN filter\n",
663 __func__);
664 return NULL;
665 }
666 f->vlan = vlan;
667
668 INIT_LIST_HEAD(&f->list);
669 list_add(&f->list, &adapter->vlan_filter_list);
670 f->add = true;
671 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
672 }
673
674 return f;
675}
676
677/**
678 * i40evf_del_vlan - Remove a vlan filter from the list
679 * @adapter: board private structure
680 * @vlan: VLAN tag
681 **/
682static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
683{
684 struct i40evf_vlan_filter *f;
685
686 f = i40evf_find_vlan(adapter, vlan);
687 if (f) {
688 f->remove = true;
689 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
690 }
691 return;
692}
693
694/**
695 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
696 * @netdev: network device struct
697 * @vid: VLAN tag
698 **/
699static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
700 __always_unused __be16 proto, u16 vid)
701{
702 struct i40evf_adapter *adapter = netdev_priv(netdev);
703
704 if (i40evf_add_vlan(adapter, vid) == NULL)
705 return -ENOMEM;
706 return 0;
707}
708
709/**
710 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
711 * @netdev: network device struct
712 * @vid: VLAN tag
713 **/
714static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
715 __always_unused __be16 proto, u16 vid)
716{
717 struct i40evf_adapter *adapter = netdev_priv(netdev);
718
719 i40evf_del_vlan(adapter, vid);
720 return 0;
721}
722
723/**
724 * i40evf_find_filter - Search filter list for specific mac filter
725 * @adapter: board private structure
726 * @macaddr: the MAC address
727 *
728 * Returns ptr to the filter object or NULL
729 **/
730static struct
731i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
732 u8 *macaddr)
733{
734 struct i40evf_mac_filter *f;
735
736 if (!macaddr)
737 return NULL;
738
739 list_for_each_entry(f, &adapter->mac_filter_list, list) {
740 if (ether_addr_equal(macaddr, f->macaddr))
741 return f;
742 }
743 return NULL;
744}
745
746/**
747 * i40e_add_filter - Add a mac filter to the filter list
748 * @adapter: board private structure
749 * @macaddr: the MAC address
750 *
751 * Returns ptr to the filter object or NULL when no memory available.
752 **/
753static struct
754i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
755 u8 *macaddr)
756{
757 struct i40evf_mac_filter *f;
758
759 if (!macaddr)
760 return NULL;
761
762 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
763 &adapter->crit_section))
764 mdelay(1);
765
766 f = i40evf_find_filter(adapter, macaddr);
767 if (NULL == f) {
768 f = kzalloc(sizeof(*f), GFP_ATOMIC);
769 if (NULL == f) {
770 dev_info(&adapter->pdev->dev,
771 "%s: no memory for new filter\n", __func__);
772 clear_bit(__I40EVF_IN_CRITICAL_TASK,
773 &adapter->crit_section);
774 return NULL;
775 }
776
777 memcpy(f->macaddr, macaddr, ETH_ALEN);
778
779 list_add(&f->list, &adapter->mac_filter_list);
780 f->add = true;
781 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
782 }
783
784 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
785 return f;
786}
787
788/**
789 * i40evf_set_mac - NDO callback to set port mac address
790 * @netdev: network interface device structure
791 * @p: pointer to an address structure
792 *
793 * Returns 0 on success, negative on failure
794 **/
795static int i40evf_set_mac(struct net_device *netdev, void *p)
796{
797 struct i40evf_adapter *adapter = netdev_priv(netdev);
798 struct i40e_hw *hw = &adapter->hw;
799 struct i40evf_mac_filter *f;
800 struct sockaddr *addr = p;
801
802 if (!is_valid_ether_addr(addr->sa_data))
803 return -EADDRNOTAVAIL;
804
805 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
806 return 0;
807
808 f = i40evf_add_filter(adapter, addr->sa_data);
809 if (f) {
810 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
811 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
812 netdev->addr_len);
813 }
814
815 return (f == NULL) ? -ENOMEM : 0;
816}
817
818/**
819 * i40evf_set_rx_mode - NDO callback to set the netdev filters
820 * @netdev: network interface device structure
821 **/
822static void i40evf_set_rx_mode(struct net_device *netdev)
823{
824 struct i40evf_adapter *adapter = netdev_priv(netdev);
825 struct i40evf_mac_filter *f, *ftmp;
826 struct netdev_hw_addr *uca;
827 struct netdev_hw_addr *mca;
828
829 /* add addr if not already in the filter list */
830 netdev_for_each_uc_addr(uca, netdev) {
831 i40evf_add_filter(adapter, uca->addr);
832 }
833 netdev_for_each_mc_addr(mca, netdev) {
834 i40evf_add_filter(adapter, mca->addr);
835 }
836
837 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
838 &adapter->crit_section))
839 mdelay(1);
840 /* remove filter if not in netdev list */
841 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
842 bool found = false;
843
844 if (f->macaddr[0] & 0x01) {
845 netdev_for_each_mc_addr(mca, netdev) {
846 if (ether_addr_equal(mca->addr, f->macaddr)) {
847 found = true;
848 break;
849 }
850 }
851 } else {
852 netdev_for_each_uc_addr(uca, netdev) {
853 if (ether_addr_equal(uca->addr, f->macaddr)) {
854 found = true;
855 break;
856 }
857 }
858 }
859 if (found) {
860 f->remove = true;
861 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
862 }
863 }
864 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
865}
866
867/**
868 * i40evf_napi_enable_all - enable NAPI on all queue vectors
869 * @adapter: board private structure
870 **/
871static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
872{
873 int q_idx;
874 struct i40e_q_vector *q_vector;
875 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
876
877 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
878 struct napi_struct *napi;
879 q_vector = adapter->q_vector[q_idx];
880 napi = &q_vector->napi;
881 napi_enable(napi);
882 }
883}
884
885/**
886 * i40evf_napi_disable_all - disable NAPI on all queue vectors
887 * @adapter: board private structure
888 **/
889static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
890{
891 int q_idx;
892 struct i40e_q_vector *q_vector;
893 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
894
895 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
896 q_vector = adapter->q_vector[q_idx];
897 napi_disable(&q_vector->napi);
898 }
899}
900
901/**
902 * i40evf_configure - set up transmit and receive data structures
903 * @adapter: board private structure
904 **/
905static void i40evf_configure(struct i40evf_adapter *adapter)
906{
907 struct net_device *netdev = adapter->netdev;
908 int i;
909
910 i40evf_set_rx_mode(netdev);
911
912 i40evf_configure_tx(adapter);
913 i40evf_configure_rx(adapter);
914 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
915
916 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
917 struct i40e_ring *ring = adapter->rx_rings[i];
918 i40evf_alloc_rx_buffers(ring, ring->count);
919 ring->next_to_use = ring->count - 1;
920 writel(ring->next_to_use, ring->tail);
921 }
922}
923
924/**
925 * i40evf_up_complete - Finish the last steps of bringing up a connection
926 * @adapter: board private structure
927 **/
928static int i40evf_up_complete(struct i40evf_adapter *adapter)
929{
930 adapter->state = __I40EVF_RUNNING;
931 clear_bit(__I40E_DOWN, &adapter->vsi.state);
932
933 i40evf_napi_enable_all(adapter);
934
935 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
936 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
937 return 0;
938}
939
940/**
941 * i40evf_clean_all_rx_rings - Free Rx Buffers for all queues
942 * @adapter: board private structure
943 **/
944static void i40evf_clean_all_rx_rings(struct i40evf_adapter *adapter)
945{
946 int i;
947
948 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
949 i40evf_clean_rx_ring(adapter->rx_rings[i]);
950}
951
952/**
953 * i40evf_clean_all_tx_rings - Free Tx Buffers for all queues
954 * @adapter: board private structure
955 **/
956static void i40evf_clean_all_tx_rings(struct i40evf_adapter *adapter)
957{
958 int i;
959
960 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
961 i40evf_clean_tx_ring(adapter->tx_rings[i]);
962}
963
964/**
965 * i40e_down - Shutdown the connection processing
966 * @adapter: board private structure
967 **/
968void i40evf_down(struct i40evf_adapter *adapter)
969{
970 struct net_device *netdev = adapter->netdev;
971 struct i40evf_mac_filter *f;
972
ef8693eb 973 /* remove all MAC filters */
5eae00c5
GR		 974 list_for_each_entry(f, &adapter->mac_filter_list, list) {
975 f->remove = true;
976 }
ed1f5b58
MW		 977 /* remove all VLAN filters */
978 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
979 f->remove = true;
980 }
ef8693eb
MW		 981 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
982 adapter->state != __I40EVF_RESETTING) {
983 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
ed1f5b58 984 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
ef8693eb
MW		 985 /* disable receives */
986 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
987 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
988 msleep(20);
989 }
5eae00c5
GR		 990 netif_tx_disable(netdev);
991
992 netif_tx_stop_all_queues(netdev);
993
994 i40evf_irq_disable(adapter);
995
996 i40evf_napi_disable_all(adapter);
997
998 netif_carrier_off(netdev);
999
1000 i40evf_clean_all_tx_rings(adapter);
1001 i40evf_clean_all_rx_rings(adapter);
1002}
1003
1004/**
1005 * i40evf_acquire_msix_vectors - Setup the MSIX capability
1006 * @adapter: board private structure
1007 * @vectors: number of vectors to request
1008 *
1009 * Work with the OS to set up the MSIX vectors needed.
1010 *
1011 * Returns 0 on success, negative on failure
1012 **/
1013static int
1014i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1015{
1016 int err, vector_threshold;
1017
1018 /* We'll want at least 3 (vector_threshold):
1019 * 0) Other (Admin Queue and link, mostly)
1020 * 1) TxQ[0] Cleanup
1021 * 2) RxQ[0] Cleanup
1022 */
1023 vector_threshold = MIN_MSIX_COUNT;
1024
1025 /* The more we get, the more we will assign to Tx/Rx Cleanup
1026 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1027 * Right now, we simply care about how many we'll get; we'll
1028 * set them up later while requesting irq's.
1029 */
1030 while (vectors >= vector_threshold) {
1031 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
1032 vectors);
1033 if (!err) /* Success in acquiring all requested vectors. */
1034 break;
1035 else if (err < 0)
1036 vectors = 0; /* Nasty failure, quit now */
1037 else /* err == number of vectors we should try again with */
1038 vectors = err;
1039 }
1040
1041 if (vectors < vector_threshold) {
1042 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts.\n");
1043 kfree(adapter->msix_entries);
1044 adapter->msix_entries = NULL;
1045 err = -EIO;
1046 } else {
1047 /* Adjust for only the vectors we'll use, which is minimum
1048 * of max_msix_q_vectors + NONQ_VECS, or the number of
1049 * vectors we were allocated.
1050 */
1051 adapter->num_msix_vectors = vectors;
1052 }
1053 return err;
1054}
1055
1056/**
1057 * i40evf_free_queues - Free memory for all rings
1058 * @adapter: board private structure to initialize
1059 *
1060 * Free all of the memory associated with queue pairs.
1061 **/
1062static void i40evf_free_queues(struct i40evf_adapter *adapter)
1063{
1064 int i;
1065
1066 if (!adapter->vsi_res)
1067 return;
1068 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1069 if (adapter->tx_rings[i])
1070 kfree_rcu(adapter->tx_rings[i], rcu);
1071 adapter->tx_rings[i] = NULL;
1072 adapter->rx_rings[i] = NULL;
1073 }
1074}
1075
1076/**
1077 * i40evf_alloc_queues - Allocate memory for all rings
1078 * @adapter: board private structure to initialize
1079 *
1080 * We allocate one ring per queue at run-time since we don't know the
1081 * number of queues at compile-time. The polling_netdev array is
1082 * intended for Multiqueue, but should work fine with a single queue.
1083 **/
1084static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1085{
1086 int i;
1087
1088 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1089 struct i40e_ring *tx_ring;
1090 struct i40e_ring *rx_ring;
1091
1092 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
1093 if (!tx_ring)
1094 goto err_out;
1095
1096 tx_ring->queue_index = i;
1097 tx_ring->netdev = adapter->netdev;
1098 tx_ring->dev = &adapter->pdev->dev;
1099 tx_ring->count = I40EVF_DEFAULT_TXD;
1100 adapter->tx_rings[i] = tx_ring;
1101
1102 rx_ring = &tx_ring[1];
1103 rx_ring->queue_index = i;
1104 rx_ring->netdev = adapter->netdev;
1105 rx_ring->dev = &adapter->pdev->dev;
1106 rx_ring->count = I40EVF_DEFAULT_RXD;
1107 adapter->rx_rings[i] = rx_ring;
1108 }
1109
1110 return 0;
1111
1112err_out:
1113 i40evf_free_queues(adapter);
1114 return -ENOMEM;
1115}
1116
1117/**
1118 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1119 * @adapter: board private structure to initialize
1120 *
1121 * Attempt to configure the interrupts using the best available
1122 * capabilities of the hardware and the kernel.
1123 **/
1124static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1125{
1126 int vector, v_budget;
1127 int pairs = 0;
1128 int err = 0;
1129
1130 if (!adapter->vsi_res) {
1131 err = -EIO;
1132 goto out;
1133 }
1134 pairs = adapter->vsi_res->num_queue_pairs;
1135
1136 /* It's easy to be greedy for MSI-X vectors, but it really
1137 * doesn't do us much good if we have a lot more vectors
1138 * than CPU's. So let's be conservative and only ask for
1139 * (roughly) twice the number of vectors as there are CPU's.
1140 */
30a500e2
MW		 1141 v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1142 v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
5eae00c5
GR		 1143
1144 /* A failure in MSI-X entry allocation isn't fatal, but it does
1145 * mean we disable MSI-X capabilities of the adapter.
1146 */
1147 adapter->msix_entries = kcalloc(v_budget,
1148 sizeof(struct msix_entry), GFP_KERNEL);
1149 if (!adapter->msix_entries) {
1150 err = -ENOMEM;
1151 goto out;
1152 }
1153
1154 for (vector = 0; vector < v_budget; vector++)
1155 adapter->msix_entries[vector].entry = vector;
1156
1157 i40evf_acquire_msix_vectors(adapter, v_budget);
1158
1159out:
1160 adapter->netdev->real_num_tx_queues = pairs;
1161 return err;
1162}
1163
1164/**
1165 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1166 * @adapter: board private structure to initialize
1167 *
1168 * We allocate one q_vector per queue interrupt. If allocation fails we
1169 * return -ENOMEM.
1170 **/
1171static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1172{
1173 int q_idx, num_q_vectors;
1174 struct i40e_q_vector *q_vector;
1175
1176 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1177
1178 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1179 q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
1180 if (!q_vector)
1181 goto err_out;
1182 q_vector->adapter = adapter;
1183 q_vector->vsi = &adapter->vsi;
1184 q_vector->v_idx = q_idx;
1185 netif_napi_add(adapter->netdev, &q_vector->napi,
1186 i40evf_napi_poll, 64);
1187 adapter->q_vector[q_idx] = q_vector;
1188 }
1189
1190 return 0;
1191
1192err_out:
1193 while (q_idx) {
1194 q_idx--;
1195 q_vector = adapter->q_vector[q_idx];
1196 netif_napi_del(&q_vector->napi);
1197 kfree(q_vector);
1198 adapter->q_vector[q_idx] = NULL;
1199 }
1200 return -ENOMEM;
1201}
1202
1203/**
1204 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1205 * @adapter: board private structure to initialize
1206 *
1207 * This function frees the memory allocated to the q_vectors. In addition if
1208 * NAPI is enabled it will delete any references to the NAPI struct prior
1209 * to freeing the q_vector.
1210 **/
1211static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1212{
1213 int q_idx, num_q_vectors;
1214 int napi_vectors;
1215
1216 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1217 napi_vectors = adapter->vsi_res->num_queue_pairs;
1218
1219 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1220 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1221
1222 adapter->q_vector[q_idx] = NULL;
1223 if (q_idx < napi_vectors)
1224 netif_napi_del(&q_vector->napi);
1225 kfree(q_vector);
1226 }
1227}
1228
1229/**
1230 * i40evf_reset_interrupt_capability - Reset MSIX setup
1231 * @adapter: board private structure
1232 *
1233 **/
1234void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1235{
1236 pci_disable_msix(adapter->pdev);
1237 kfree(adapter->msix_entries);
1238 adapter->msix_entries = NULL;
1239
1240 return;
1241}
1242
1243/**
1244 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1245 * @adapter: board private structure to initialize
1246 *
1247 **/
1248int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1249{
1250 int err;
1251
1252 err = i40evf_set_interrupt_capability(adapter);
1253 if (err) {
1254 dev_err(&adapter->pdev->dev,
1255 "Unable to setup interrupt capabilities\n");
1256 goto err_set_interrupt;
1257 }
1258
1259 err = i40evf_alloc_q_vectors(adapter);
1260 if (err) {
1261 dev_err(&adapter->pdev->dev,
1262 "Unable to allocate memory for queue vectors\n");
1263 goto err_alloc_q_vectors;
1264 }
1265
1266 err = i40evf_alloc_queues(adapter);
1267 if (err) {
1268 dev_err(&adapter->pdev->dev,
1269 "Unable to allocate memory for queues\n");
1270 goto err_alloc_queues;
1271 }
1272
1273 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1274 (adapter->vsi_res->num_queue_pairs > 1) ? "Enabled" :
1275 "Disabled", adapter->vsi_res->num_queue_pairs);
1276
1277 return 0;
1278err_alloc_queues:
1279 i40evf_free_q_vectors(adapter);
1280err_alloc_q_vectors:
1281 i40evf_reset_interrupt_capability(adapter);
1282err_set_interrupt:
1283 return err;
1284}
1285
1286/**
1287 * i40evf_watchdog_timer - Periodic call-back timer
1288 * @data: pointer to adapter disguised as unsigned long
1289 **/
1290static void i40evf_watchdog_timer(unsigned long data)
1291{
1292 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1293 schedule_work(&adapter->watchdog_task);
1294 /* timer will be rescheduled in watchdog task */
1295}
1296
1297/**
1298 * i40evf_watchdog_task - Periodic call-back task
1299 * @work: pointer to work_struct
1300 **/
1301static void i40evf_watchdog_task(struct work_struct *work)
1302{
1303 struct i40evf_adapter *adapter = container_of(work,
1304 struct i40evf_adapter,
1305 watchdog_task);
1306 struct i40e_hw *hw = &adapter->hw;
1307
ef8693eb
MW		 1308 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1309 goto restart_watchdog;
1310
1311 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1312 dev_info(&adapter->pdev->dev, "Checking for redemption\n");
1313 if ((rd32(hw, I40E_VFGEN_RSTAT) & 0x3) == I40E_VFR_VFACTIVE) {
1314 /* A chance for redemption! */
1315 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1316 adapter->state = __I40EVF_STARTUP;
1317 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1318 schedule_delayed_work(&adapter->init_task, 10);
1319 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1320 &adapter->crit_section);
1321 /* Don't reschedule the watchdog, since we've restarted
1322 * the init task. When init_task contacts the PF and
1323 * gets everything set up again, it'll restart the
1324 * watchdog for us. Down, boy. Sit. Stay. Woof.
1325 */
1326 return;
1327 }
1328 adapter->aq_pending = 0;
1329 adapter->aq_required = 0;
1330 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5 1331 goto watchdog_done;
ef8693eb 1332 }
5eae00c5 1333
ef8693eb
MW		 1334 if ((adapter->state < __I40EVF_DOWN) ||
1335 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
5eae00c5
GR		 1336 goto watchdog_done;
1337
ef8693eb
MW		 1338 /* check for reset */
1339 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
5eae00c5
GR		 1340 (rd32(hw, I40E_VFGEN_RSTAT) & 0x3) != I40E_VFR_VFACTIVE) {
1341 adapter->state = __I40EVF_RESETTING;
ef8693eb
MW		 1342 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1343 dev_err(&adapter->pdev->dev, "Hardware reset detected.\n");
1344 dev_info(&adapter->pdev->dev, "Scheduling reset task\n");
5eae00c5 1345 schedule_work(&adapter->reset_task);
ef8693eb
MW		 1346 adapter->aq_pending = 0;
1347 adapter->aq_required = 0;
1348 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 1349 goto watchdog_done;
1350 }
1351
1352 /* Process admin queue tasks. After init, everything gets done
1353 * here so we don't race on the admin queue.
1354 */
1355 if (adapter->aq_pending)
1356 goto watchdog_done;
1357
1358 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1359 i40evf_map_queues(adapter);
1360 goto watchdog_done;
1361 }
1362
1363 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1364 i40evf_add_ether_addrs(adapter);
1365 goto watchdog_done;
1366 }
1367
1368 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1369 i40evf_add_vlans(adapter);
1370 goto watchdog_done;
1371 }
1372
1373 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1374 i40evf_del_ether_addrs(adapter);
1375 goto watchdog_done;
1376 }
1377
1378 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1379 i40evf_del_vlans(adapter);
1380 goto watchdog_done;
1381 }
1382
1383 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1384 i40evf_disable_queues(adapter);
1385 goto watchdog_done;
1386 }
1387
1388 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1389 i40evf_configure_queues(adapter);
1390 goto watchdog_done;
1391 }
1392
1393 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1394 i40evf_enable_queues(adapter);
1395 goto watchdog_done;
1396 }
1397
1398 if (adapter->state == __I40EVF_RUNNING)
1399 i40evf_request_stats(adapter);
1400
1401 i40evf_irq_enable(adapter, true);
1402 i40evf_fire_sw_int(adapter, 0xFF);
ef8693eb 1403
5eae00c5 1404watchdog_done:
ef8693eb
MW		 1405 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1406restart_watchdog:
5eae00c5
GR		 1407 if (adapter->aq_required)
1408 mod_timer(&adapter->watchdog_timer,
1409 jiffies + msecs_to_jiffies(20));
1410 else
1411 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
5eae00c5
GR		 1412 schedule_work(&adapter->adminq_task);
1413}
1414
5b7af02c
MW		 1415/**
1416 * i40evf_configure_rss - increment to next available tx queue
1417 * @adapter: board private structure
1418 * @j: queue counter
1419 *
1420 * Helper function for RSS programming to increment through available
1421 * queus. Returns the next queue value.
1422 **/
96d47704
MW		 1423static int next_queue(struct i40evf_adapter *adapter, int j)
1424{
1425 j += 1;
1426
1427 return j >= adapter->vsi_res->num_queue_pairs ? 0 : j;
1428}
1429
5eae00c5
GR		 1430/**
1431 * i40evf_configure_rss - Prepare for RSS if used
1432 * @adapter: board private structure
1433 **/
1434static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1435{
1436 struct i40e_hw *hw = &adapter->hw;
1437 u32 lut = 0;
1438 int i, j;
1439 u64 hena;
1440
1441 /* Set of random keys generated using kernel random number generator */
1442 static const u32 seed[I40E_VFQF_HKEY_MAX_INDEX + 1] = {
1443 0x794221b4, 0xbca0c5ab, 0x6cd5ebd9, 0x1ada6127,
1444 0x983b3aa1, 0x1c4e71eb, 0x7f6328b2, 0xfcdc0da0,
1445 0xc135cafa, 0x7a6f7e2d, 0xe7102d28, 0x163cd12e,
1446 0x4954b126 };
1447
1448 /* Hash type is configured by the PF - we just supply the key */
1449
1450 /* Fill out hash function seed */
1451 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1452 wr32(hw, I40E_VFQF_HKEY(i), seed[i]);
1453
1454 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1455 hena = I40E_DEFAULT_RSS_HENA;
1456 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1457 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1458
1459 /* Populate the LUT with max no. of queues in round robin fashion */
96d47704
MW		 1460 j = adapter->vsi_res->num_queue_pairs;
1461 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
5b7af02c
MW		 1462 j = next_queue(adapter, j);
1463 lut = j;
1464 j = next_queue(adapter, j);
1465 lut |= j << 8;
1466 j = next_queue(adapter, j);
1467 lut |= j << 16;
1468 j = next_queue(adapter, j);
1469 lut |= j << 24;
96d47704 1470 wr32(hw, I40E_VFQF_HLUT(i), lut);
5eae00c5
GR		 1471 }
1472 i40e_flush(hw);
1473}
1474
ef8693eb
MW		 1475#define I40EVF_RESET_WAIT_MS 100
1476#define I40EVF_RESET_WAIT_COUNT 200
5eae00c5
GR		 1477/**
1478 * i40evf_reset_task - Call-back task to handle hardware reset
1479 * @work: pointer to work_struct
1480 *
1481 * During reset we need to shut down and reinitialize the admin queue
1482 * before we can use it to communicate with the PF again. We also clear
1483 * and reinit the rings because that context is lost as well.
1484 **/
1485static void i40evf_reset_task(struct work_struct *work)
1486{
ef8693eb
MW		 1487 struct i40evf_adapter *adapter = container_of(work,
1488 struct i40evf_adapter,
1489 reset_task);
5eae00c5
GR		 1490 struct i40e_hw *hw = &adapter->hw;
1491 int i = 0, err;
1492 uint32_t rstat_val;
1493
1494 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1495 &adapter->crit_section))
1496 udelay(500);
3526d800
MW		 1497
1498 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1499 dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
1500 i40evf_request_reset(adapter);
1501 }
1502
ef8693eb
MW		 1503 /* poll until we see the reset actually happen */
1504 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1505 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1506 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1507 if (rstat_val != I40E_VFR_VFACTIVE) {
1508 dev_info(&adapter->pdev->dev, "Reset now occurring\n");
1509 break;
1510 } else {
1511 msleep(I40EVF_RESET_WAIT_MS);
1512 }
1513 }
1514 if (i == I40EVF_RESET_WAIT_COUNT) {
1515 dev_err(&adapter->pdev->dev, "Reset was not detected\n");
1516 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1517 goto continue_reset; /* act like the reset happened */
1518 }
5eae00c5 1519
ef8693eb
MW		 1520 /* wait until the reset is complete and the PF is responding to us */
1521 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
5eae00c5
GR		 1522 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1523 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
ef8693eb
MW		 1524 if (rstat_val == I40E_VFR_VFACTIVE) {
1525 dev_info(&adapter->pdev->dev, "Reset is complete. Reinitializing.\n");
5eae00c5 1526 break;
ef8693eb
MW		 1527 } else {
1528 msleep(I40EVF_RESET_WAIT_MS);
1529 }
5eae00c5 1530 }
ef8693eb 1531 if (i == I40EVF_RESET_WAIT_COUNT) {
5eae00c5 1532 /* reset never finished */
ef8693eb
MW		 1533 dev_err(&adapter->pdev->dev, "Reset never finished (%x). PF driver is dead, and so am I.\n",
1534 rstat_val);
1535 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1536
1537 if (netif_running(adapter->netdev))
1538 i40evf_close(adapter->netdev);
1539
1540 i40evf_free_misc_irq(adapter);
1541 i40evf_reset_interrupt_capability(adapter);
1542 i40evf_free_queues(adapter);
1543 kfree(adapter->vf_res);
1544 i40evf_shutdown_adminq(hw);
1545 adapter->netdev->flags &= ~IFF_UP;
1546 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1547 return; /* Do not attempt to reinit. It's dead, Jim. */
5eae00c5 1548 }
ef8693eb
MW		 1549
1550continue_reset:
1551 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1552
5eae00c5
GR		 1553 i40evf_down(adapter);
1554 adapter->state = __I40EVF_RESETTING;
1555
1556 /* kill and reinit the admin queue */
1557 if (i40evf_shutdown_adminq(hw))
1558 dev_warn(&adapter->pdev->dev,
1559 "%s: Failed to destroy the Admin Queue resources\n",
1560 __func__);
1561 err = i40evf_init_adminq(hw);
1562 if (err)
1563 dev_info(&adapter->pdev->dev, "%s: init_adminq failed: %d\n",
1564 __func__, err);
1565
1566 adapter->aq_pending = 0;
1567 adapter->aq_required = 0;
1568 i40evf_map_queues(adapter);
1569 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1570
1571 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1572
1573 if (netif_running(adapter->netdev)) {
1574 /* allocate transmit descriptors */
1575 err = i40evf_setup_all_tx_resources(adapter);
1576 if (err)
1577 goto reset_err;
1578
1579 /* allocate receive descriptors */
1580 err = i40evf_setup_all_rx_resources(adapter);
1581 if (err)
1582 goto reset_err;
1583
1584 i40evf_configure(adapter);
1585
1586 err = i40evf_up_complete(adapter);
1587 if (err)
1588 goto reset_err;
1589
1590 i40evf_irq_enable(adapter, true);
1591 }
1592 return;
1593reset_err:
1594 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit.\n");
1595 i40evf_close(adapter->netdev);
1596}
1597
1598/**
1599 * i40evf_adminq_task - worker thread to clean the admin queue
1600 * @work: pointer to work_struct containing our data
1601 **/
1602static void i40evf_adminq_task(struct work_struct *work)
1603{
1604 struct i40evf_adapter *adapter =
1605 container_of(work, struct i40evf_adapter, adminq_task);
1606 struct i40e_hw *hw = &adapter->hw;
1607 struct i40e_arq_event_info event;
1608 struct i40e_virtchnl_msg *v_msg;
1609 i40e_status ret;
1610 u16 pending;
1611
ef8693eb
MW		 1612 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1613 return;
1614
5eae00c5
GR		 1615 event.msg_size = I40EVF_MAX_AQ_BUF_SIZE;
1616 event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
1617 if (!event.msg_buf) {
1618 dev_info(&adapter->pdev->dev, "%s: no memory for ARQ clean\n",
1619 __func__);
1620 return;
1621 }
1622 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1623 do {
1624 ret = i40evf_clean_arq_element(hw, &event, &pending);
1625 if (ret)
1626 break; /* No event to process or error cleaning ARQ */
1627
1628 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1629 v_msg->v_retval, event.msg_buf,
1630 event.msg_size);
1631 if (pending != 0) {
1632 dev_info(&adapter->pdev->dev,
1633 "%s: ARQ: Pending events %d\n",
1634 __func__, pending);
1635 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1636 }
1637 } while (pending);
1638
1639 /* re-enable Admin queue interrupt cause */
1640 i40evf_misc_irq_enable(adapter);
1641
1642 kfree(event.msg_buf);
1643}
1644
1645/**
1646 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1647 * @adapter: board private structure
1648 *
1649 * Free all transmit software resources
1650 **/
1651static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1652{
1653 int i;
1654
1655 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1656 if (adapter->tx_rings[i]->desc)
1657 i40evf_free_tx_resources(adapter->tx_rings[i]);
1658
1659}
1660
1661/**
1662 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1663 * @adapter: board private structure
1664 *
1665 * If this function returns with an error, then it's possible one or
1666 * more of the rings is populated (while the rest are not). It is the
1667 * callers duty to clean those orphaned rings.
1668 *
1669 * Return 0 on success, negative on failure
1670 **/
1671static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1672{
1673 int i, err = 0;
1674
1675 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1676 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1677 if (!err)
1678 continue;
1679 dev_err(&adapter->pdev->dev,
1680 "%s: Allocation for Tx Queue %u failed\n",
1681 __func__, i);
1682 break;
1683 }
1684
1685 return err;
1686}
1687
1688/**
1689 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1690 * @adapter: board private structure
1691 *
1692 * If this function returns with an error, then it's possible one or
1693 * more of the rings is populated (while the rest are not). It is the
1694 * callers duty to clean those orphaned rings.
1695 *
1696 * Return 0 on success, negative on failure
1697 **/
1698static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1699{
1700 int i, err = 0;
1701
1702 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1703 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1704 if (!err)
1705 continue;
1706 dev_err(&adapter->pdev->dev,
1707 "%s: Allocation for Rx Queue %u failed\n",
1708 __func__, i);
1709 break;
1710 }
1711 return err;
1712}
1713
1714/**
1715 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1716 * @adapter: board private structure
1717 *
1718 * Free all receive software resources
1719 **/
1720static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1721{
1722 int i;
1723
1724 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1725 if (adapter->rx_rings[i]->desc)
1726 i40evf_free_rx_resources(adapter->rx_rings[i]);
1727}
1728
1729/**
1730 * i40evf_open - Called when a network interface is made active
1731 * @netdev: network interface device structure
1732 *
1733 * Returns 0 on success, negative value on failure
1734 *
1735 * The open entry point is called when a network interface is made
1736 * active by the system (IFF_UP). At this point all resources needed
1737 * for transmit and receive operations are allocated, the interrupt
1738 * handler is registered with the OS, the watchdog timer is started,
1739 * and the stack is notified that the interface is ready.
1740 **/
1741static int i40evf_open(struct net_device *netdev)
1742{
1743 struct i40evf_adapter *adapter = netdev_priv(netdev);
1744 int err;
1745
ef8693eb
MW		 1746 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1747 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1748 return -EIO;
1749 }
5eae00c5
GR		 1750 if (adapter->state != __I40EVF_DOWN)
1751 return -EBUSY;
1752
1753 /* allocate transmit descriptors */
1754 err = i40evf_setup_all_tx_resources(adapter);
1755 if (err)
1756 goto err_setup_tx;
1757
1758 /* allocate receive descriptors */
1759 err = i40evf_setup_all_rx_resources(adapter);
1760 if (err)
1761 goto err_setup_rx;
1762
1763 /* clear any pending interrupts, may auto mask */
1764 err = i40evf_request_traffic_irqs(adapter, netdev->name);
1765 if (err)
1766 goto err_req_irq;
1767
1768 i40evf_configure(adapter);
1769
1770 err = i40evf_up_complete(adapter);
1771 if (err)
1772 goto err_req_irq;
1773
1774 i40evf_irq_enable(adapter, true);
1775
1776 return 0;
1777
1778err_req_irq:
1779 i40evf_down(adapter);
1780 i40evf_free_traffic_irqs(adapter);
1781err_setup_rx:
1782 i40evf_free_all_rx_resources(adapter);
1783err_setup_tx:
1784 i40evf_free_all_tx_resources(adapter);
1785
1786 return err;
1787}
1788
1789/**
1790 * i40evf_close - Disables a network interface
1791 * @netdev: network interface device structure
1792 *
1793 * Returns 0, this is not allowed to fail
1794 *
1795 * The close entry point is called when an interface is de-activated
1796 * by the OS. The hardware is still under the drivers control, but
1797 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1798 * are freed, along with all transmit and receive resources.
1799 **/
1800static int i40evf_close(struct net_device *netdev)
1801{
1802 struct i40evf_adapter *adapter = netdev_priv(netdev);
1803
ef8693eb
MW		 1804 if (adapter->state <= __I40EVF_DOWN)
1805 return 0;
1806
5eae00c5
GR		 1807 /* signal that we are down to the interrupt handler */
1808 adapter->state = __I40EVF_DOWN;
ef8693eb 1809
5eae00c5
GR		 1810 set_bit(__I40E_DOWN, &adapter->vsi.state);
1811
1812 i40evf_down(adapter);
1813 i40evf_free_traffic_irqs(adapter);
1814
1815 i40evf_free_all_tx_resources(adapter);
1816 i40evf_free_all_rx_resources(adapter);
1817
1818 return 0;
1819}
1820
1821/**
1822 * i40evf_get_stats - Get System Network Statistics
1823 * @netdev: network interface device structure
1824 *
1825 * Returns the address of the device statistics structure.
1826 * The statistics are actually updated from the timer callback.
1827 **/
1828static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1829{
1830 struct i40evf_adapter *adapter = netdev_priv(netdev);
1831
1832 /* only return the current stats */
1833 return &adapter->net_stats;
1834}
1835
1836/**
1837 * i40evf_reinit_locked - Software reinit
1838 * @adapter: board private structure
1839 *
1840 * Reinititalizes the ring structures in response to a software configuration
1841 * change. Roughly the same as close followed by open, but skips releasing
1842 * and reallocating the interrupts.
1843 **/
1844void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1845{
1846 struct net_device *netdev = adapter->netdev;
1847 int err;
1848
1849 WARN_ON(in_interrupt());
1850
1851 adapter->state = __I40EVF_RESETTING;
1852
1853 i40evf_down(adapter);
1854
1855 /* allocate transmit descriptors */
1856 err = i40evf_setup_all_tx_resources(adapter);
1857 if (err)
1858 goto err_reinit;
1859
1860 /* allocate receive descriptors */
1861 err = i40evf_setup_all_rx_resources(adapter);
1862 if (err)
1863 goto err_reinit;
1864
1865 i40evf_configure(adapter);
1866
1867 err = i40evf_up_complete(adapter);
1868 if (err)
1869 goto err_reinit;
1870
1871 i40evf_irq_enable(adapter, true);
1872 return;
1873
1874err_reinit:
1875 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit.\n");
1876 i40evf_close(netdev);
1877}
1878
1879/**
1880 * i40evf_change_mtu - Change the Maximum Transfer Unit
1881 * @netdev: network interface device structure
1882 * @new_mtu: new value for maximum frame size
1883 *
1884 * Returns 0 on success, negative on failure
1885 **/
1886static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1887{
1888 struct i40evf_adapter *adapter = netdev_priv(netdev);
1889 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1890
1891 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1892 return -EINVAL;
1893
1894 /* must set new MTU before calling down or up */
1895 netdev->mtu = new_mtu;
1896 i40evf_reinit_locked(adapter);
1897 return 0;
1898}
1899
1900static const struct net_device_ops i40evf_netdev_ops = {
1901 .ndo_open = i40evf_open,
1902 .ndo_stop = i40evf_close,
1903 .ndo_start_xmit = i40evf_xmit_frame,
1904 .ndo_get_stats = i40evf_get_stats,
1905 .ndo_set_rx_mode = i40evf_set_rx_mode,
1906 .ndo_validate_addr = eth_validate_addr,
1907 .ndo_set_mac_address = i40evf_set_mac,
1908 .ndo_change_mtu = i40evf_change_mtu,
1909 .ndo_tx_timeout = i40evf_tx_timeout,
1910 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
1911 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
1912};
1913
1914/**
1915 * i40evf_check_reset_complete - check that VF reset is complete
1916 * @hw: pointer to hw struct
1917 *
1918 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1919 **/
1920static int i40evf_check_reset_complete(struct i40e_hw *hw)
1921{
1922 u32 rstat;
1923 int i;
1924
1925 for (i = 0; i < 100; i++) {
1926 rstat = rd32(hw, I40E_VFGEN_RSTAT);
1927 if (rstat == I40E_VFR_VFACTIVE)
1928 return 0;
1929 udelay(10);
1930 }
1931 return -EBUSY;
1932}
1933
1934/**
1935 * i40evf_init_task - worker thread to perform delayed initialization
1936 * @work: pointer to work_struct containing our data
1937 *
1938 * This task completes the work that was begun in probe. Due to the nature
1939 * of VF-PF communications, we may need to wait tens of milliseconds to get
1940 * reponses back from the PF. Rather than busy-wait in probe and bog down the
1941 * whole system, we'll do it in a task so we can sleep.
1942 * This task only runs during driver init. Once we've established
1943 * communications with the PF driver and set up our netdev, the watchdog
1944 * takes over.
1945 **/
1946static void i40evf_init_task(struct work_struct *work)
1947{
1948 struct i40evf_adapter *adapter = container_of(work,
1949 struct i40evf_adapter,
1950 init_task.work);
1951 struct net_device *netdev = adapter->netdev;
1952 struct i40evf_mac_filter *f;
1953 struct i40e_hw *hw = &adapter->hw;
1954 struct pci_dev *pdev = adapter->pdev;
1955 int i, err, bufsz;
1956
1957 switch (adapter->state) {
1958 case __I40EVF_STARTUP:
1959 /* driver loaded, probe complete */
ef8693eb
MW		 1960 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1961 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
5eae00c5
GR		 1962 err = i40e_set_mac_type(hw);
1963 if (err) {
c2a137cb
MW		 1964 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
1965 err);
5eae00c5
GR		 1966 goto err;
1967 }
1968 err = i40evf_check_reset_complete(hw);
1969 if (err) {
c2a137cb
MW		 1970 dev_err(&pdev->dev, "Device is still in reset (%d)\n",
1971 err);
5eae00c5
GR		 1972 goto err;
1973 }
1974 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
1975 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
1976 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1977 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1978
1979 err = i40evf_init_adminq(hw);
1980 if (err) {
c2a137cb
MW		 1981 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
1982 err);
5eae00c5
GR		 1983 goto err;
1984 }
1985 err = i40evf_send_api_ver(adapter);
1986 if (err) {
10bdd67b 1987 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
5eae00c5
GR		 1988 i40evf_shutdown_adminq(hw);
1989 goto err;
1990 }
1991 adapter->state = __I40EVF_INIT_VERSION_CHECK;
1992 goto restart;
1993 break;
1994 case __I40EVF_INIT_VERSION_CHECK:
10bdd67b
MW		 1995 if (!i40evf_asq_done(hw)) {
1996 dev_err(&pdev->dev, "Admin queue command never completed.\n");
5eae00c5 1997 goto err;
10bdd67b 1998 }
5eae00c5
GR		 1999
2000 /* aq msg sent, awaiting reply */
2001 err = i40evf_verify_api_ver(adapter);
2002 if (err) {
c2a137cb 2003 dev_err(&pdev->dev, "Unable to verify API version (%d)\n",
5eae00c5
GR		 2004 err);
2005 goto err;
2006 }
2007 err = i40evf_send_vf_config_msg(adapter);
2008 if (err) {
c2a137cb 2009 dev_err(&pdev->dev, "Unable send config request (%d)\n",
5eae00c5
GR		 2010 err);
2011 goto err;
2012 }
2013 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2014 goto restart;
2015 break;
2016 case __I40EVF_INIT_GET_RESOURCES:
2017 /* aq msg sent, awaiting reply */
2018 if (!adapter->vf_res) {
2019 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2020 (I40E_MAX_VF_VSI *
2021 sizeof(struct i40e_virtchnl_vsi_resource));
2022 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
c2a137cb 2023 if (!adapter->vf_res)
5eae00c5 2024 goto err;
5eae00c5
GR		 2025 }
2026 err = i40evf_get_vf_config(adapter);
2027 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2028 goto restart;
2029 if (err) {
c2a137cb
MW		 2030 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2031 err);
5eae00c5
GR		 2032 goto err_alloc;
2033 }
2034 adapter->state = __I40EVF_INIT_SW;
2035 break;
2036 default:
2037 goto err_alloc;
2038 }
2039 /* got VF config message back from PF, now we can parse it */
2040 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2041 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2042 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2043 }
2044 if (!adapter->vsi_res) {
c2a137cb 2045 dev_err(&pdev->dev, "No LAN VSI found\n");
5eae00c5
GR		 2046 goto err_alloc;
2047 }
2048
2049 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2050
5eae00c5
GR		 2051 netdev->netdev_ops = &i40evf_netdev_ops;
2052 i40evf_set_ethtool_ops(netdev);
2053 netdev->watchdog_timeo = 5 * HZ;
dbbd8111
MW		 2054 netdev->features |= NETIF_F_HIGHDMA |
2055 NETIF_F_SG |
5eae00c5
GR		 2056 NETIF_F_IP_CSUM |
2057 NETIF_F_SCTP_CSUM |
2058 NETIF_F_IPV6_CSUM |
2059 NETIF_F_TSO |
2060 NETIF_F_TSO6 |
3415e8ce 2061 NETIF_F_RXCSUM |
5eae00c5
GR		 2062 NETIF_F_GRO;
2063
2064 if (adapter->vf_res->vf_offload_flags
2065 & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2066 netdev->vlan_features = netdev->features;
2067 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2068 NETIF_F_HW_VLAN_CTAG_RX |
2069 NETIF_F_HW_VLAN_CTAG_FILTER;
2070 }
2071
3415e8ce
GR		 2072 /* copy netdev features into list of user selectable features */
2073 netdev->hw_features |= netdev->features;
2074 netdev->hw_features &= ~NETIF_F_RXCSUM;
2075
5eae00c5 2076 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
c2a137cb
MW		 2077 dev_info(&pdev->dev, "Invalid MAC address %pMAC, using random\n",
2078 adapter->hw.mac.addr);
5eae00c5
GR		 2079 random_ether_addr(adapter->hw.mac.addr);
2080 }
2081 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
2082 memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
2083
2084 INIT_LIST_HEAD(&adapter->mac_filter_list);
2085 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2086 f = kzalloc(sizeof(*f), GFP_ATOMIC);
2087 if (NULL == f)
2088 goto err_sw_init;
2089
2090 memcpy(f->macaddr, adapter->hw.mac.addr, ETH_ALEN);
2091 f->add = true;
2092 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2093
2094 list_add(&f->list, &adapter->mac_filter_list);
2095
2096 init_timer(&adapter->watchdog_timer);
2097 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2098 adapter->watchdog_timer.data = (unsigned long)adapter;
2099 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2100
2101 err = i40evf_init_interrupt_scheme(adapter);
2102 if (err)
2103 goto err_sw_init;
2104 i40evf_map_rings_to_vectors(adapter);
2105 i40evf_configure_rss(adapter);
2106 err = i40evf_request_misc_irq(adapter);
2107 if (err)
2108 goto err_sw_init;
2109
2110 netif_carrier_off(netdev);
2111
5eae00c5
GR		 2112 adapter->vsi.id = adapter->vsi_res->vsi_id;
2113 adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2114 adapter->vsi.back = adapter;
2115 adapter->vsi.base_vector = 1;
2116 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2117 adapter->vsi.rx_itr_setting = I40E_ITR_DYNAMIC;
2118 adapter->vsi.tx_itr_setting = I40E_ITR_DYNAMIC;
2119 adapter->vsi.netdev = adapter->netdev;
2120
ef8693eb
MW		 2121 if (!adapter->netdev_registered) {
2122 err = register_netdev(netdev);
2123 if (err)
2124 goto err_register;
2125 }
5eae00c5
GR		 2126
2127 adapter->netdev_registered = true;
2128
2129 netif_tx_stop_all_queues(netdev);
2130
2131 dev_info(&pdev->dev, "MAC address: %pMAC\n", adapter->hw.mac.addr);
2132 if (netdev->features & NETIF_F_GRO)
2133 dev_info(&pdev->dev, "GRO is enabled\n");
2134
2135 dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2136 adapter->state = __I40EVF_DOWN;
2137 set_bit(__I40E_DOWN, &adapter->vsi.state);
2138 i40evf_misc_irq_enable(adapter);
2139 return;
2140restart:
2141 schedule_delayed_work(&adapter->init_task,
2142 msecs_to_jiffies(50));
2143 return;
2144
2145err_register:
2146 i40evf_free_misc_irq(adapter);
2147err_sw_init:
2148 i40evf_reset_interrupt_capability(adapter);
5eae00c5
GR		 2149err_alloc:
2150 kfree(adapter->vf_res);
2151 adapter->vf_res = NULL;
2152err:
2153 /* Things went into the weeds, so try again later */
2154 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2155 dev_err(&pdev->dev, "Failed to communicate with PF; giving up.\n");
ef8693eb 2156 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
5eae00c5
GR		 2157 return; /* do not reschedule */
2158 }
2159 schedule_delayed_work(&adapter->init_task, HZ * 3);
2160 return;
2161}
2162
2163/**
2164 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2165 * @pdev: pci device structure
2166 **/
2167static void i40evf_shutdown(struct pci_dev *pdev)
2168{
2169 struct net_device *netdev = pci_get_drvdata(pdev);
2170
2171 netif_device_detach(netdev);
2172
2173 if (netif_running(netdev))
2174 i40evf_close(netdev);
2175
2176#ifdef CONFIG_PM
2177 pci_save_state(pdev);
2178
2179#endif
2180 pci_disable_device(pdev);
2181}
2182
2183/**
2184 * i40evf_probe - Device Initialization Routine
2185 * @pdev: PCI device information struct
2186 * @ent: entry in i40evf_pci_tbl
2187 *
2188 * Returns 0 on success, negative on failure
2189 *
2190 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2191 * The OS initialization, configuring of the adapter private structure,
2192 * and a hardware reset occur.
2193 **/
2194static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2195{
2196 struct net_device *netdev;
2197 struct i40evf_adapter *adapter = NULL;
2198 struct i40e_hw *hw = NULL;
dbbd8111 2199 int err;
5eae00c5
GR		 2200
2201 err = pci_enable_device(pdev);
2202 if (err)
2203 return err;
2204
6494294f 2205 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
6494294f 2206 if (err) {
e3e3bfdd
JS		 2207 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2208 if (err) {
2209 dev_err(&pdev->dev,
2210 "DMA configuration failed: 0x%x\n", err);
2211 goto err_dma;
2212 }
5eae00c5
GR		 2213 }
2214
2215 err = pci_request_regions(pdev, i40evf_driver_name);
2216 if (err) {
2217 dev_err(&pdev->dev,
2218 "pci_request_regions failed 0x%x\n", err);
2219 goto err_pci_reg;
2220 }
2221
2222 pci_enable_pcie_error_reporting(pdev);
2223
2224 pci_set_master(pdev);
2225
2226 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2227 MAX_TX_QUEUES);
2228 if (!netdev) {
2229 err = -ENOMEM;
2230 goto err_alloc_etherdev;
2231 }
2232
2233 SET_NETDEV_DEV(netdev, &pdev->dev);
2234
2235 pci_set_drvdata(pdev, netdev);
2236 adapter = netdev_priv(netdev);
5eae00c5
GR		 2237
2238 adapter->netdev = netdev;
2239 adapter->pdev = pdev;
2240
2241 hw = &adapter->hw;
2242 hw->back = adapter;
2243
2244 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2245 adapter->state = __I40EVF_STARTUP;
2246
2247 /* Call save state here because it relies on the adapter struct. */
2248 pci_save_state(pdev);
2249
2250 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2251 pci_resource_len(pdev, 0));
2252 if (!hw->hw_addr) {
2253 err = -EIO;
2254 goto err_ioremap;
2255 }
2256 hw->vendor_id = pdev->vendor;
2257 hw->device_id = pdev->device;
2258 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2259 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2260 hw->subsystem_device_id = pdev->subsystem_device;
2261 hw->bus.device = PCI_SLOT(pdev->devfn);
2262 hw->bus.func = PCI_FUNC(pdev->devfn);
2263
2264 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2265 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2266 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2267 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2268 schedule_delayed_work(&adapter->init_task, 10);
2269
2270 return 0;
2271
2272err_ioremap:
2273 free_netdev(netdev);
2274err_alloc_etherdev:
2275 pci_release_regions(pdev);
2276err_pci_reg:
2277err_dma:
2278 pci_disable_device(pdev);
2279 return err;
2280}
2281
2282#ifdef CONFIG_PM
2283/**
2284 * i40evf_suspend - Power management suspend routine
2285 * @pdev: PCI device information struct
2286 * @state: unused
2287 *
2288 * Called when the system (VM) is entering sleep/suspend.
2289 **/
2290static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2291{
2292 struct net_device *netdev = pci_get_drvdata(pdev);
2293 struct i40evf_adapter *adapter = netdev_priv(netdev);
2294 int retval = 0;
2295
2296 netif_device_detach(netdev);
2297
2298 if (netif_running(netdev)) {
2299 rtnl_lock();
2300 i40evf_down(adapter);
2301 rtnl_unlock();
2302 }
2303 i40evf_free_misc_irq(adapter);
2304 i40evf_reset_interrupt_capability(adapter);
2305
2306 retval = pci_save_state(pdev);
2307 if (retval)
2308 return retval;
2309
2310 pci_disable_device(pdev);
2311
2312 return 0;
2313}
2314
2315/**
2316 * i40evf_resume - Power managment resume routine
2317 * @pdev: PCI device information struct
2318 *
2319 * Called when the system (VM) is resumed from sleep/suspend.
2320 **/
2321static int i40evf_resume(struct pci_dev *pdev)
2322{
2323 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2324 struct net_device *netdev = adapter->netdev;
2325 u32 err;
2326
2327 pci_set_power_state(pdev, PCI_D0);
2328 pci_restore_state(pdev);
2329 /* pci_restore_state clears dev->state_saved so call
2330 * pci_save_state to restore it.
2331 */
2332 pci_save_state(pdev);
2333
2334 err = pci_enable_device_mem(pdev);
2335 if (err) {
2336 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2337 return err;
2338 }
2339 pci_set_master(pdev);
2340
2341 rtnl_lock();
2342 err = i40evf_set_interrupt_capability(adapter);
2343 if (err) {
2344 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2345 return err;
2346 }
2347 err = i40evf_request_misc_irq(adapter);
2348 rtnl_unlock();
2349 if (err) {
2350 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2351 return err;
2352 }
2353
2354 schedule_work(&adapter->reset_task);
2355
2356 netif_device_attach(netdev);
2357
2358 return err;
2359}
2360
2361#endif /* CONFIG_PM */
2362/**
2363 * i40evf_remove - Device Removal Routine
2364 * @pdev: PCI device information struct
2365 *
2366 * i40evf_remove is called by the PCI subsystem to alert the driver
2367 * that it should release a PCI device. The could be caused by a
2368 * Hot-Plug event, or because the driver is going to be removed from
2369 * memory.
2370 **/
2371static void i40evf_remove(struct pci_dev *pdev)
2372{
2373 struct net_device *netdev = pci_get_drvdata(pdev);
2374 struct i40evf_adapter *adapter = netdev_priv(netdev);
2375 struct i40e_hw *hw = &adapter->hw;
2376
2377 cancel_delayed_work_sync(&adapter->init_task);
ef8693eb 2378 cancel_work_sync(&adapter->reset_task);
5eae00c5
GR		 2379
2380 if (adapter->netdev_registered) {
2381 unregister_netdev(netdev);
2382 adapter->netdev_registered = false;
2383 }
2384 adapter->state = __I40EVF_REMOVE;
2385
dbb01c8a 2386 if (adapter->msix_entries) {
5eae00c5 2387 i40evf_misc_irq_disable(adapter);
5eae00c5 2388 i40evf_free_misc_irq(adapter);
5eae00c5
GR		 2389 i40evf_reset_interrupt_capability(adapter);
2390 }
2391
dbb01c8a
MW		 2392 del_timer_sync(&adapter->watchdog_timer);
2393 flush_scheduled_work();
2394
5eae00c5
GR		 2395 if (hw->aq.asq.count)
2396 i40evf_shutdown_adminq(hw);
2397
2398 iounmap(hw->hw_addr);
2399 pci_release_regions(pdev);
2400
2401 i40evf_free_queues(adapter);
2402 kfree(adapter->vf_res);
2403
2404 free_netdev(netdev);
2405
2406 pci_disable_pcie_error_reporting(pdev);
2407
2408 pci_disable_device(pdev);
2409}
2410
2411static struct pci_driver i40evf_driver = {
2412 .name = i40evf_driver_name,
2413 .id_table = i40evf_pci_tbl,
2414 .probe = i40evf_probe,
2415 .remove = i40evf_remove,
2416#ifdef CONFIG_PM
2417 .suspend = i40evf_suspend,
2418 .resume = i40evf_resume,
2419#endif
2420 .shutdown = i40evf_shutdown,
2421};
2422
2423/**
2424 * i40e_init_module - Driver Registration Routine
2425 *
2426 * i40e_init_module is the first routine called when the driver is
2427 * loaded. All it does is register with the PCI subsystem.
2428 **/
2429static int __init i40evf_init_module(void)
2430{
2431 int ret;
2432 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2433 i40evf_driver_version);
2434
2435 pr_info("%s\n", i40evf_copyright);
2436
2437 ret = pci_register_driver(&i40evf_driver);
2438 return ret;
2439}
2440
2441module_init(i40evf_init_module);
2442
2443/**
2444 * i40e_exit_module - Driver Exit Cleanup Routine
2445 *
2446 * i40e_exit_module is called just before the driver is removed
2447 * from memory.
2448 **/
2449static void __exit i40evf_exit_module(void)
2450{
2451 pci_unregister_driver(&i40evf_driver);
2452}
2453
2454module_exit(i40evf_exit_module);
2455
2456/* i40evf_main.c */
Linux kernel - Deliverables
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