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i40e/i40evf: Bump build version
[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 *
b831607d
JB		 15 * You should have received a copy of the GNU General Public License along
16 * with this program. If not, see <http://www.gnu.org/licenses/>.
17 *
5eae00c5
GR		 18 * The full GNU General Public License is included in this distribution in
19 * the file called "COPYING".
20 *
21 * Contact Information:
22 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24 *
25 ******************************************************************************/
26
27#include "i40evf.h"
28#include "i40e_prototype.h"
29static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter);
30static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter);
169f4076
MW		 31static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter);
32static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter);
5eae00c5
GR		 33static int i40evf_close(struct net_device *netdev);
34
35char i40evf_driver_name[] = "i40evf";
36static const char i40evf_driver_string[] =
37 "Intel(R) XL710 X710 Virtual Function Network Driver";
38
e454d6bf 39#define DRV_VERSION "0.9.27"
5eae00c5
GR		 40const char i40evf_driver_version[] = DRV_VERSION;
41static const char i40evf_copyright[] =
673f2ebf 42 "Copyright (c) 2013 - 2014 Intel Corporation.";
5eae00c5
GR		 43
44/* i40evf_pci_tbl - PCI Device ID Table
45 *
46 * Wildcard entries (PCI_ANY_ID) should come last
47 * Last entry must be all 0s
48 *
49 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
50 * Class, Class Mask, private data (not used) }
51 */
52static DEFINE_PCI_DEVICE_TABLE(i40evf_pci_tbl) = {
ab60085e 53 {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
5eae00c5
GR		 54 /* required last entry */
55 {0, }
56};
57
58MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
59
60MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
61MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
62MODULE_LICENSE("GPL");
63MODULE_VERSION(DRV_VERSION);
64
65/**
66 * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
67 * @hw: pointer to the HW structure
68 * @mem: ptr to mem struct to fill out
69 * @size: size of memory requested
70 * @alignment: what to align the allocation to
71 **/
72i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
73 struct i40e_dma_mem *mem,
74 u64 size, u32 alignment)
75{
76 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
77
78 if (!mem)
79 return I40E_ERR_PARAM;
80
81 mem->size = ALIGN(size, alignment);
82 mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
83 (dma_addr_t *)&mem->pa, GFP_KERNEL);
84 if (mem->va)
85 return 0;
86 else
87 return I40E_ERR_NO_MEMORY;
88}
89
90/**
91 * i40evf_free_dma_mem_d - OS specific memory free for shared code
92 * @hw: pointer to the HW structure
93 * @mem: ptr to mem struct to free
94 **/
95i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
96{
97 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
98
99 if (!mem || !mem->va)
100 return I40E_ERR_PARAM;
101 dma_free_coherent(&adapter->pdev->dev, mem->size,
102 mem->va, (dma_addr_t)mem->pa);
103 return 0;
104}
105
106/**
107 * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
108 * @hw: pointer to the HW structure
109 * @mem: ptr to mem struct to fill out
110 * @size: size of memory requested
111 **/
112i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
113 struct i40e_virt_mem *mem, u32 size)
114{
115 if (!mem)
116 return I40E_ERR_PARAM;
117
118 mem->size = size;
119 mem->va = kzalloc(size, GFP_KERNEL);
120
121 if (mem->va)
122 return 0;
123 else
124 return I40E_ERR_NO_MEMORY;
125}
126
127/**
128 * i40evf_free_virt_mem_d - OS specific memory free for shared code
129 * @hw: pointer to the HW structure
130 * @mem: ptr to mem struct to free
131 **/
132i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
133 struct i40e_virt_mem *mem)
134{
135 if (!mem)
136 return I40E_ERR_PARAM;
137
138 /* it's ok to kfree a NULL pointer */
139 kfree(mem->va);
140
141 return 0;
142}
143
144/**
145 * i40evf_debug_d - OS dependent version of debug printing
146 * @hw: pointer to the HW structure
147 * @mask: debug level mask
148 * @fmt_str: printf-type format description
149 **/
150void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
151{
152 char buf[512];
153 va_list argptr;
154
155 if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
156 return;
157
158 va_start(argptr, fmt_str);
159 vsnprintf(buf, sizeof(buf), fmt_str, argptr);
160 va_end(argptr);
161
162 /* the debug string is already formatted with a newline */
163 pr_info("%s", buf);
164}
165
166/**
167 * i40evf_tx_timeout - Respond to a Tx Hang
168 * @netdev: network interface device structure
169 **/
170static void i40evf_tx_timeout(struct net_device *netdev)
171{
172 struct i40evf_adapter *adapter = netdev_priv(netdev);
173
174 adapter->tx_timeout_count++;
625777e3
MW		 175 dev_info(&adapter->pdev->dev, "TX timeout detected.\n");
176 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) {
3526d800 177 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
625777e3
MW		 178 schedule_work(&adapter->reset_task);
179 }
5eae00c5
GR		 180}
181
182/**
183 * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
184 * @adapter: board private structure
185 **/
186static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
187{
188 struct i40e_hw *hw = &adapter->hw;
189 wr32(hw, I40E_VFINT_DYN_CTL01, 0);
190
191 /* read flush */
192 rd32(hw, I40E_VFGEN_RSTAT);
193
194 synchronize_irq(adapter->msix_entries[0].vector);
195}
196
197/**
198 * i40evf_misc_irq_enable - Enable default interrupt generation settings
199 * @adapter: board private structure
200 **/
201static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
202{
203 struct i40e_hw *hw = &adapter->hw;
204 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
205 I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
206 wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA_ADMINQ_MASK);
207
208 /* read flush */
209 rd32(hw, I40E_VFGEN_RSTAT);
210}
211
212/**
213 * i40evf_irq_disable - Mask off interrupt generation on the NIC
214 * @adapter: board private structure
215 **/
216static void i40evf_irq_disable(struct i40evf_adapter *adapter)
217{
218 int i;
219 struct i40e_hw *hw = &adapter->hw;
220
dbb01c8a
MW		 221 if (!adapter->msix_entries)
222 return;
223
5eae00c5
GR		 224 for (i = 1; i < adapter->num_msix_vectors; i++) {
225 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
226 synchronize_irq(adapter->msix_entries[i].vector);
227 }
228 /* read flush */
229 rd32(hw, I40E_VFGEN_RSTAT);
230
231}
232
233/**
234 * i40evf_irq_enable_queues - Enable interrupt for specified queues
235 * @adapter: board private structure
236 * @mask: bitmap of queues to enable
237 **/
238void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
239{
240 struct i40e_hw *hw = &adapter->hw;
241 int i;
242
243 for (i = 1; i < adapter->num_msix_vectors; i++) {
244 if (mask & (1 << (i - 1))) {
245 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
246 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
247 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
248 }
249 }
250}
251
252/**
253 * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
254 * @adapter: board private structure
255 * @mask: bitmap of vectors to trigger
256 **/
257static void i40evf_fire_sw_int(struct i40evf_adapter *adapter,
258 u32 mask)
259{
260 struct i40e_hw *hw = &adapter->hw;
261 int i;
262 uint32_t dyn_ctl;
263
264 for (i = 1; i < adapter->num_msix_vectors; i++) {
265 if (mask & (1 << i)) {
266 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
267 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
268 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
269 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
270 }
271 }
272}
273
274/**
275 * i40evf_irq_enable - Enable default interrupt generation settings
276 * @adapter: board private structure
277 **/
278void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
279{
280 struct i40e_hw *hw = &adapter->hw;
281
282 i40evf_irq_enable_queues(adapter, ~0);
283
284 if (flush)
285 rd32(hw, I40E_VFGEN_RSTAT);
286}
287
288/**
289 * i40evf_msix_aq - Interrupt handler for vector 0
290 * @irq: interrupt number
291 * @data: pointer to netdev
292 **/
293static irqreturn_t i40evf_msix_aq(int irq, void *data)
294{
295 struct net_device *netdev = data;
296 struct i40evf_adapter *adapter = netdev_priv(netdev);
297 struct i40e_hw *hw = &adapter->hw;
298 u32 val;
299 u32 ena_mask;
300
301 /* handle non-queue interrupts */
302 val = rd32(hw, I40E_VFINT_ICR01);
303 ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
304
305
306 val = rd32(hw, I40E_VFINT_DYN_CTL01);
307 val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
308 wr32(hw, I40E_VFINT_DYN_CTL01, val);
309
310 /* re-enable interrupt causes */
311 wr32(hw, I40E_VFINT_ICR0_ENA1, ena_mask);
312 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK);
313
314 /* schedule work on the private workqueue */
315 schedule_work(&adapter->adminq_task);
316
317 return IRQ_HANDLED;
318}
319
320/**
321 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
322 * @irq: interrupt number
323 * @data: pointer to a q_vector
324 **/
325static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
326{
327 struct i40e_q_vector *q_vector = data;
328
329 if (!q_vector->tx.ring && !q_vector->rx.ring)
330 return IRQ_HANDLED;
331
332 napi_schedule(&q_vector->napi);
333
334 return IRQ_HANDLED;
335}
336
337/**
338 * i40evf_map_vector_to_rxq - associate irqs with rx queues
339 * @adapter: board private structure
340 * @v_idx: interrupt number
341 * @r_idx: queue number
342 **/
343static void
344i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
345{
346 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
347 struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
348
349 rx_ring->q_vector = q_vector;
350 rx_ring->next = q_vector->rx.ring;
351 rx_ring->vsi = &adapter->vsi;
352 q_vector->rx.ring = rx_ring;
353 q_vector->rx.count++;
354 q_vector->rx.latency_range = I40E_LOW_LATENCY;
355}
356
357/**
358 * i40evf_map_vector_to_txq - associate irqs with tx queues
359 * @adapter: board private structure
360 * @v_idx: interrupt number
361 * @t_idx: queue number
362 **/
363static void
364i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
365{
366 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
367 struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
368
369 tx_ring->q_vector = q_vector;
370 tx_ring->next = q_vector->tx.ring;
371 tx_ring->vsi = &adapter->vsi;
372 q_vector->tx.ring = tx_ring;
373 q_vector->tx.count++;
374 q_vector->tx.latency_range = I40E_LOW_LATENCY;
375 q_vector->num_ringpairs++;
376 q_vector->ring_mask |= (1 << t_idx);
377}
378
379/**
380 * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
381 * @adapter: board private structure to initialize
382 *
383 * This function maps descriptor rings to the queue-specific vectors
384 * we were allotted through the MSI-X enabling code. Ideally, we'd have
385 * one vector per ring/queue, but on a constrained vector budget, we
386 * group the rings as "efficiently" as possible. You would add new
387 * mapping configurations in here.
388 **/
389static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
390{
391 int q_vectors;
392 int v_start = 0;
393 int rxr_idx = 0, txr_idx = 0;
394 int rxr_remaining = adapter->vsi_res->num_queue_pairs;
395 int txr_remaining = adapter->vsi_res->num_queue_pairs;
396 int i, j;
397 int rqpv, tqpv;
398 int err = 0;
399
400 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
401
402 /* The ideal configuration...
403 * We have enough vectors to map one per queue.
404 */
405 if (q_vectors == (rxr_remaining * 2)) {
406 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
407 i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
408
409 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
410 i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
411 goto out;
412 }
413
414 /* If we don't have enough vectors for a 1-to-1
415 * mapping, we'll have to group them so there are
416 * multiple queues per vector.
417 * Re-adjusting *qpv takes care of the remainder.
418 */
419 for (i = v_start; i < q_vectors; i++) {
420 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
421 for (j = 0; j < rqpv; j++) {
422 i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
423 rxr_idx++;
424 rxr_remaining--;
425 }
426 }
427 for (i = v_start; i < q_vectors; i++) {
428 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
429 for (j = 0; j < tqpv; j++) {
430 i40evf_map_vector_to_txq(adapter, i, txr_idx);
431 txr_idx++;
432 txr_remaining--;
433 }
434 }
435
436out:
437 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
438
439 return err;
440}
441
442/**
443 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
444 * @adapter: board private structure
445 *
446 * Allocates MSI-X vectors for tx and rx handling, and requests
447 * interrupts from the kernel.
448 **/
449static int
450i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
451{
452 int vector, err, q_vectors;
453 int rx_int_idx = 0, tx_int_idx = 0;
454
455 i40evf_irq_disable(adapter);
456 /* Decrement for Other and TCP Timer vectors */
457 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
458
459 for (vector = 0; vector < q_vectors; vector++) {
460 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
461
462 if (q_vector->tx.ring && q_vector->rx.ring) {
463 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
464 "i40evf-%s-%s-%d", basename,
465 "TxRx", rx_int_idx++);
466 tx_int_idx++;
467 } else if (q_vector->rx.ring) {
468 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
469 "i40evf-%s-%s-%d", basename,
470 "rx", rx_int_idx++);
471 } else if (q_vector->tx.ring) {
472 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
473 "i40evf-%s-%s-%d", basename,
474 "tx", tx_int_idx++);
475 } else {
476 /* skip this unused q_vector */
477 continue;
478 }
479 err = request_irq(
480 adapter->msix_entries[vector + NONQ_VECS].vector,
481 i40evf_msix_clean_rings,
482 0,
483 q_vector->name,
484 q_vector);
485 if (err) {
486 dev_info(&adapter->pdev->dev,
487 "%s: request_irq failed, error: %d\n",
488 __func__, err);
489 goto free_queue_irqs;
490 }
491 /* assign the mask for this irq */
492 irq_set_affinity_hint(
493 adapter->msix_entries[vector + NONQ_VECS].vector,
494 q_vector->affinity_mask);
495 }
496
497 return 0;
498
499free_queue_irqs:
500 while (vector) {
501 vector--;
502 irq_set_affinity_hint(
503 adapter->msix_entries[vector + NONQ_VECS].vector,
504 NULL);
505 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
506 adapter->q_vector[vector]);
507 }
508 return err;
509}
510
511/**
512 * i40evf_request_misc_irq - Initialize MSI-X interrupts
513 * @adapter: board private structure
514 *
515 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
516 * vector is only for the admin queue, and stays active even when the netdev
517 * is closed.
518 **/
519static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
520{
521 struct net_device *netdev = adapter->netdev;
522 int err;
523
e1dfee8e 524 sprintf(adapter->misc_vector_name, "i40evf:mbx");
5eae00c5 525 err = request_irq(adapter->msix_entries[0].vector,
e1dfee8e
MW		 526 &i40evf_msix_aq, 0,
527 adapter->misc_vector_name, netdev);
5eae00c5
GR		 528 if (err) {
529 dev_err(&adapter->pdev->dev,
77fa28be
CS		 530 "request_irq for %s failed: %d\n",
531 adapter->misc_vector_name, err);
5eae00c5
GR		 532 free_irq(adapter->msix_entries[0].vector, netdev);
533 }
534 return err;
535}
536
537/**
538 * i40evf_free_traffic_irqs - Free MSI-X interrupts
539 * @adapter: board private structure
540 *
541 * Frees all MSI-X vectors other than 0.
542 **/
543static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
544{
545 int i;
546 int q_vectors;
547 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
548
549 for (i = 0; i < q_vectors; i++) {
550 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
551 NULL);
552 free_irq(adapter->msix_entries[i+1].vector,
553 adapter->q_vector[i]);
554 }
555}
556
557/**
558 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
559 * @adapter: board private structure
560 *
561 * Frees MSI-X vector 0.
562 **/
563static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
564{
565 struct net_device *netdev = adapter->netdev;
566
567 free_irq(adapter->msix_entries[0].vector, netdev);
568}
569
570/**
571 * i40evf_configure_tx - Configure Transmit Unit after Reset
572 * @adapter: board private structure
573 *
574 * Configure the Tx unit of the MAC after a reset.
575 **/
576static void i40evf_configure_tx(struct i40evf_adapter *adapter)
577{
578 struct i40e_hw *hw = &adapter->hw;
579 int i;
580 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
581 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
582}
583
584/**
585 * i40evf_configure_rx - Configure Receive Unit after Reset
586 * @adapter: board private structure
587 *
588 * Configure the Rx unit of the MAC after a reset.
589 **/
590static void i40evf_configure_rx(struct i40evf_adapter *adapter)
591{
592 struct i40e_hw *hw = &adapter->hw;
593 struct net_device *netdev = adapter->netdev;
594 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
595 int i;
596 int rx_buf_len;
597
598
599 adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
600 adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
601
602 /* Decide whether to use packet split mode or not */
603 if (netdev->mtu > ETH_DATA_LEN) {
604 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
605 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
606 else
607 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
608 } else {
609 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
610 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
611 else
612 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
613 }
614
615 /* Set the RX buffer length according to the mode */
616 if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
617 rx_buf_len = I40E_RX_HDR_SIZE;
618 } else {
619 if (netdev->mtu <= ETH_DATA_LEN)
620 rx_buf_len = I40EVF_RXBUFFER_2048;
621 else
622 rx_buf_len = ALIGN(max_frame, 1024);
623 }
624
625 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
626 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
627 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
628 }
629}
630
631/**
632 * i40evf_find_vlan - Search filter list for specific vlan filter
633 * @adapter: board private structure
634 * @vlan: vlan tag
635 *
636 * Returns ptr to the filter object or NULL
637 **/
638static struct
639i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
640{
641 struct i40evf_vlan_filter *f;
642
643 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
644 if (vlan == f->vlan)
645 return f;
646 }
647 return NULL;
648}
649
650/**
651 * i40evf_add_vlan - Add a vlan filter to the list
652 * @adapter: board private structure
653 * @vlan: VLAN tag
654 *
655 * Returns ptr to the filter object or NULL when no memory available.
656 **/
657static struct
658i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
659{
660 struct i40evf_vlan_filter *f;
661
662 f = i40evf_find_vlan(adapter, vlan);
663 if (NULL == f) {
664 f = kzalloc(sizeof(*f), GFP_ATOMIC);
665 if (NULL == f) {
666 dev_info(&adapter->pdev->dev,
667 "%s: no memory for new VLAN filter\n",
668 __func__);
669 return NULL;
670 }
671 f->vlan = vlan;
672
673 INIT_LIST_HEAD(&f->list);
674 list_add(&f->list, &adapter->vlan_filter_list);
675 f->add = true;
676 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
677 }
678
679 return f;
680}
681
682/**
683 * i40evf_del_vlan - Remove a vlan filter from the list
684 * @adapter: board private structure
685 * @vlan: VLAN tag
686 **/
687static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
688{
689 struct i40evf_vlan_filter *f;
690
691 f = i40evf_find_vlan(adapter, vlan);
692 if (f) {
693 f->remove = true;
694 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
695 }
5eae00c5
GR		 696}
697
698/**
699 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
700 * @netdev: network device struct
701 * @vid: VLAN tag
702 **/
703static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
704 __always_unused __be16 proto, u16 vid)
705{
706 struct i40evf_adapter *adapter = netdev_priv(netdev);
707
708 if (i40evf_add_vlan(adapter, vid) == NULL)
709 return -ENOMEM;
710 return 0;
711}
712
713/**
714 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
715 * @netdev: network device struct
716 * @vid: VLAN tag
717 **/
718static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
719 __always_unused __be16 proto, u16 vid)
720{
721 struct i40evf_adapter *adapter = netdev_priv(netdev);
722
723 i40evf_del_vlan(adapter, vid);
724 return 0;
725}
726
727/**
728 * i40evf_find_filter - Search filter list for specific mac filter
729 * @adapter: board private structure
730 * @macaddr: the MAC address
731 *
732 * Returns ptr to the filter object or NULL
733 **/
734static struct
735i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
736 u8 *macaddr)
737{
738 struct i40evf_mac_filter *f;
739
740 if (!macaddr)
741 return NULL;
742
743 list_for_each_entry(f, &adapter->mac_filter_list, list) {
744 if (ether_addr_equal(macaddr, f->macaddr))
745 return f;
746 }
747 return NULL;
748}
749
750/**
751 * i40e_add_filter - Add a mac filter to the filter list
752 * @adapter: board private structure
753 * @macaddr: the MAC address
754 *
755 * Returns ptr to the filter object or NULL when no memory available.
756 **/
757static struct
758i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
759 u8 *macaddr)
760{
761 struct i40evf_mac_filter *f;
762
763 if (!macaddr)
764 return NULL;
765
766 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
767 &adapter->crit_section))
768 mdelay(1);
769
770 f = i40evf_find_filter(adapter, macaddr);
771 if (NULL == f) {
772 f = kzalloc(sizeof(*f), GFP_ATOMIC);
773 if (NULL == f) {
774 dev_info(&adapter->pdev->dev,
775 "%s: no memory for new filter\n", __func__);
776 clear_bit(__I40EVF_IN_CRITICAL_TASK,
777 &adapter->crit_section);
778 return NULL;
779 }
780
781 memcpy(f->macaddr, macaddr, ETH_ALEN);
782
783 list_add(&f->list, &adapter->mac_filter_list);
784 f->add = true;
785 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
786 }
787
788 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
789 return f;
790}
791
792/**
793 * i40evf_set_mac - NDO callback to set port mac address
794 * @netdev: network interface device structure
795 * @p: pointer to an address structure
796 *
797 * Returns 0 on success, negative on failure
798 **/
799static int i40evf_set_mac(struct net_device *netdev, void *p)
800{
801 struct i40evf_adapter *adapter = netdev_priv(netdev);
802 struct i40e_hw *hw = &adapter->hw;
803 struct i40evf_mac_filter *f;
804 struct sockaddr *addr = p;
805
806 if (!is_valid_ether_addr(addr->sa_data))
807 return -EADDRNOTAVAIL;
808
809 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
810 return 0;
811
812 f = i40evf_add_filter(adapter, addr->sa_data);
813 if (f) {
814 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
815 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
816 netdev->addr_len);
817 }
818
819 return (f == NULL) ? -ENOMEM : 0;
820}
821
822/**
823 * i40evf_set_rx_mode - NDO callback to set the netdev filters
824 * @netdev: network interface device structure
825 **/
826static void i40evf_set_rx_mode(struct net_device *netdev)
827{
828 struct i40evf_adapter *adapter = netdev_priv(netdev);
829 struct i40evf_mac_filter *f, *ftmp;
830 struct netdev_hw_addr *uca;
831 struct netdev_hw_addr *mca;
832
833 /* add addr if not already in the filter list */
834 netdev_for_each_uc_addr(uca, netdev) {
835 i40evf_add_filter(adapter, uca->addr);
836 }
837 netdev_for_each_mc_addr(mca, netdev) {
838 i40evf_add_filter(adapter, mca->addr);
839 }
840
841 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
842 &adapter->crit_section))
843 mdelay(1);
844 /* remove filter if not in netdev list */
845 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
846 bool found = false;
847
dc5f2de6 848 if (is_multicast_ether_addr(f->macaddr)) {
5eae00c5
GR		 849 netdev_for_each_mc_addr(mca, netdev) {
850 if (ether_addr_equal(mca->addr, f->macaddr)) {
851 found = true;
852 break;
853 }
854 }
855 } else {
856 netdev_for_each_uc_addr(uca, netdev) {
857 if (ether_addr_equal(uca->addr, f->macaddr)) {
858 found = true;
859 break;
860 }
861 }
862 }
863 if (found) {
864 f->remove = true;
865 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
866 }
867 }
868 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
869}
870
871/**
872 * i40evf_napi_enable_all - enable NAPI on all queue vectors
873 * @adapter: board private structure
874 **/
875static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
876{
877 int q_idx;
878 struct i40e_q_vector *q_vector;
879 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
880
881 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
882 struct napi_struct *napi;
883 q_vector = adapter->q_vector[q_idx];
884 napi = &q_vector->napi;
885 napi_enable(napi);
886 }
887}
888
889/**
890 * i40evf_napi_disable_all - disable NAPI on all queue vectors
891 * @adapter: board private structure
892 **/
893static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
894{
895 int q_idx;
896 struct i40e_q_vector *q_vector;
897 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
898
899 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
900 q_vector = adapter->q_vector[q_idx];
901 napi_disable(&q_vector->napi);
902 }
903}
904
905/**
906 * i40evf_configure - set up transmit and receive data structures
907 * @adapter: board private structure
908 **/
909static void i40evf_configure(struct i40evf_adapter *adapter)
910{
911 struct net_device *netdev = adapter->netdev;
912 int i;
913
914 i40evf_set_rx_mode(netdev);
915
916 i40evf_configure_tx(adapter);
917 i40evf_configure_rx(adapter);
918 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
919
920 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
921 struct i40e_ring *ring = adapter->rx_rings[i];
922 i40evf_alloc_rx_buffers(ring, ring->count);
923 ring->next_to_use = ring->count - 1;
924 writel(ring->next_to_use, ring->tail);
925 }
926}
927
928/**
929 * i40evf_up_complete - Finish the last steps of bringing up a connection
930 * @adapter: board private structure
931 **/
932static int i40evf_up_complete(struct i40evf_adapter *adapter)
933{
934 adapter->state = __I40EVF_RUNNING;
935 clear_bit(__I40E_DOWN, &adapter->vsi.state);
936
937 i40evf_napi_enable_all(adapter);
938
939 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
940 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
941 return 0;
942}
943
944/**
945 * i40evf_clean_all_rx_rings - Free Rx Buffers for all queues
946 * @adapter: board private structure
947 **/
948static void i40evf_clean_all_rx_rings(struct i40evf_adapter *adapter)
949{
950 int i;
951
952 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
953 i40evf_clean_rx_ring(adapter->rx_rings[i]);
954}
955
956/**
957 * i40evf_clean_all_tx_rings - Free Tx Buffers for all queues
958 * @adapter: board private structure
959 **/
960static void i40evf_clean_all_tx_rings(struct i40evf_adapter *adapter)
961{
962 int i;
963
964 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
965 i40evf_clean_tx_ring(adapter->tx_rings[i]);
966}
967
968/**
969 * i40e_down - Shutdown the connection processing
970 * @adapter: board private structure
971 **/
972void i40evf_down(struct i40evf_adapter *adapter)
973{
974 struct net_device *netdev = adapter->netdev;
975 struct i40evf_mac_filter *f;
976
ef8693eb 977 /* remove all MAC filters */
5eae00c5
GR		 978 list_for_each_entry(f, &adapter->mac_filter_list, list) {
979 f->remove = true;
980 }
ed1f5b58
MW		 981 /* remove all VLAN filters */
982 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
983 f->remove = true;
984 }
ef8693eb
MW		 985 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
986 adapter->state != __I40EVF_RESETTING) {
987 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
ed1f5b58 988 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
ef8693eb
MW		 989 /* disable receives */
990 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
991 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
992 msleep(20);
993 }
5eae00c5
GR		 994 netif_tx_disable(netdev);
995
996 netif_tx_stop_all_queues(netdev);
997
998 i40evf_irq_disable(adapter);
999
1000 i40evf_napi_disable_all(adapter);
1001
1002 netif_carrier_off(netdev);
1003
1004 i40evf_clean_all_tx_rings(adapter);
1005 i40evf_clean_all_rx_rings(adapter);
1006}
1007
1008/**
1009 * i40evf_acquire_msix_vectors - Setup the MSIX capability
1010 * @adapter: board private structure
1011 * @vectors: number of vectors to request
1012 *
1013 * Work with the OS to set up the MSIX vectors needed.
1014 *
1015 * Returns 0 on success, negative on failure
1016 **/
1017static int
1018i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1019{
1020 int err, vector_threshold;
1021
1022 /* We'll want at least 3 (vector_threshold):
1023 * 0) Other (Admin Queue and link, mostly)
1024 * 1) TxQ[0] Cleanup
1025 * 2) RxQ[0] Cleanup
1026 */
1027 vector_threshold = MIN_MSIX_COUNT;
1028
1029 /* The more we get, the more we will assign to Tx/Rx Cleanup
1030 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1031 * Right now, we simply care about how many we'll get; we'll
1032 * set them up later while requesting irq's.
1033 */
fc2f2f5d
AG		 1034 err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1035 vector_threshold, vectors);
1036 if (err < 0) {
5eae00c5
GR		 1037 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts.\n");
1038 kfree(adapter->msix_entries);
1039 adapter->msix_entries = NULL;
fc2f2f5d 1040 return err;
5eae00c5 1041 }
fc2f2f5d
AG		 1042
1043 /* Adjust for only the vectors we'll use, which is minimum
1044 * of max_msix_q_vectors + NONQ_VECS, or the number of
1045 * vectors we were allocated.
1046 */
1047 adapter->num_msix_vectors = err;
1048 return 0;
5eae00c5
GR		 1049}
1050
1051/**
1052 * i40evf_free_queues - Free memory for all rings
1053 * @adapter: board private structure to initialize
1054 *
1055 * Free all of the memory associated with queue pairs.
1056 **/
1057static void i40evf_free_queues(struct i40evf_adapter *adapter)
1058{
1059 int i;
1060
1061 if (!adapter->vsi_res)
1062 return;
1063 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1064 if (adapter->tx_rings[i])
1065 kfree_rcu(adapter->tx_rings[i], rcu);
1066 adapter->tx_rings[i] = NULL;
1067 adapter->rx_rings[i] = NULL;
1068 }
1069}
1070
1071/**
1072 * i40evf_alloc_queues - Allocate memory for all rings
1073 * @adapter: board private structure to initialize
1074 *
1075 * We allocate one ring per queue at run-time since we don't know the
1076 * number of queues at compile-time. The polling_netdev array is
1077 * intended for Multiqueue, but should work fine with a single queue.
1078 **/
1079static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1080{
1081 int i;
1082
1083 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1084 struct i40e_ring *tx_ring;
1085 struct i40e_ring *rx_ring;
1086
1087 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
1088 if (!tx_ring)
1089 goto err_out;
1090
1091 tx_ring->queue_index = i;
1092 tx_ring->netdev = adapter->netdev;
1093 tx_ring->dev = &adapter->pdev->dev;
d732a184 1094 tx_ring->count = adapter->tx_desc_count;
5eae00c5
GR		 1095 adapter->tx_rings[i] = tx_ring;
1096
1097 rx_ring = &tx_ring[1];
1098 rx_ring->queue_index = i;
1099 rx_ring->netdev = adapter->netdev;
1100 rx_ring->dev = &adapter->pdev->dev;
d732a184 1101 rx_ring->count = adapter->rx_desc_count;
5eae00c5
GR		 1102 adapter->rx_rings[i] = rx_ring;
1103 }
1104
1105 return 0;
1106
1107err_out:
1108 i40evf_free_queues(adapter);
1109 return -ENOMEM;
1110}
1111
1112/**
1113 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1114 * @adapter: board private structure to initialize
1115 *
1116 * Attempt to configure the interrupts using the best available
1117 * capabilities of the hardware and the kernel.
1118 **/
1119static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1120{
1121 int vector, v_budget;
1122 int pairs = 0;
1123 int err = 0;
1124
1125 if (!adapter->vsi_res) {
1126 err = -EIO;
1127 goto out;
1128 }
1129 pairs = adapter->vsi_res->num_queue_pairs;
1130
1131 /* It's easy to be greedy for MSI-X vectors, but it really
1132 * doesn't do us much good if we have a lot more vectors
1133 * than CPU's. So let's be conservative and only ask for
1134 * (roughly) twice the number of vectors as there are CPU's.
1135 */
30a500e2
MW		 1136 v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1137 v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
5eae00c5
GR		 1138
1139 /* A failure in MSI-X entry allocation isn't fatal, but it does
1140 * mean we disable MSI-X capabilities of the adapter.
1141 */
1142 adapter->msix_entries = kcalloc(v_budget,
1143 sizeof(struct msix_entry), GFP_KERNEL);
1144 if (!adapter->msix_entries) {
1145 err = -ENOMEM;
1146 goto out;
1147 }
1148
1149 for (vector = 0; vector < v_budget; vector++)
1150 adapter->msix_entries[vector].entry = vector;
1151
1152 i40evf_acquire_msix_vectors(adapter, v_budget);
1153
1154out:
1155 adapter->netdev->real_num_tx_queues = pairs;
1156 return err;
1157}
1158
1159/**
1160 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1161 * @adapter: board private structure to initialize
1162 *
1163 * We allocate one q_vector per queue interrupt. If allocation fails we
1164 * return -ENOMEM.
1165 **/
1166static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1167{
1168 int q_idx, num_q_vectors;
1169 struct i40e_q_vector *q_vector;
1170
1171 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1172
1173 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1174 q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
1175 if (!q_vector)
1176 goto err_out;
1177 q_vector->adapter = adapter;
1178 q_vector->vsi = &adapter->vsi;
1179 q_vector->v_idx = q_idx;
1180 netif_napi_add(adapter->netdev, &q_vector->napi,
1181 i40evf_napi_poll, 64);
1182 adapter->q_vector[q_idx] = q_vector;
1183 }
1184
1185 return 0;
1186
1187err_out:
1188 while (q_idx) {
1189 q_idx--;
1190 q_vector = adapter->q_vector[q_idx];
1191 netif_napi_del(&q_vector->napi);
1192 kfree(q_vector);
1193 adapter->q_vector[q_idx] = NULL;
1194 }
1195 return -ENOMEM;
1196}
1197
1198/**
1199 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1200 * @adapter: board private structure to initialize
1201 *
1202 * This function frees the memory allocated to the q_vectors. In addition if
1203 * NAPI is enabled it will delete any references to the NAPI struct prior
1204 * to freeing the q_vector.
1205 **/
1206static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1207{
1208 int q_idx, num_q_vectors;
1209 int napi_vectors;
1210
1211 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1212 napi_vectors = adapter->vsi_res->num_queue_pairs;
1213
1214 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1215 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1216
1217 adapter->q_vector[q_idx] = NULL;
1218 if (q_idx < napi_vectors)
1219 netif_napi_del(&q_vector->napi);
1220 kfree(q_vector);
1221 }
1222}
1223
1224/**
1225 * i40evf_reset_interrupt_capability - Reset MSIX setup
1226 * @adapter: board private structure
1227 *
1228 **/
1229void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1230{
1231 pci_disable_msix(adapter->pdev);
1232 kfree(adapter->msix_entries);
1233 adapter->msix_entries = NULL;
5eae00c5
GR		 1234}
1235
1236/**
1237 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1238 * @adapter: board private structure to initialize
1239 *
1240 **/
1241int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1242{
1243 int err;
1244
1245 err = i40evf_set_interrupt_capability(adapter);
1246 if (err) {
1247 dev_err(&adapter->pdev->dev,
1248 "Unable to setup interrupt capabilities\n");
1249 goto err_set_interrupt;
1250 }
1251
1252 err = i40evf_alloc_q_vectors(adapter);
1253 if (err) {
1254 dev_err(&adapter->pdev->dev,
1255 "Unable to allocate memory for queue vectors\n");
1256 goto err_alloc_q_vectors;
1257 }
1258
1259 err = i40evf_alloc_queues(adapter);
1260 if (err) {
1261 dev_err(&adapter->pdev->dev,
1262 "Unable to allocate memory for queues\n");
1263 goto err_alloc_queues;
1264 }
1265
1266 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1267 (adapter->vsi_res->num_queue_pairs > 1) ? "Enabled" :
1268 "Disabled", adapter->vsi_res->num_queue_pairs);
1269
1270 return 0;
1271err_alloc_queues:
1272 i40evf_free_q_vectors(adapter);
1273err_alloc_q_vectors:
1274 i40evf_reset_interrupt_capability(adapter);
1275err_set_interrupt:
1276 return err;
1277}
1278
1279/**
1280 * i40evf_watchdog_timer - Periodic call-back timer
1281 * @data: pointer to adapter disguised as unsigned long
1282 **/
1283static void i40evf_watchdog_timer(unsigned long data)
1284{
1285 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1286 schedule_work(&adapter->watchdog_task);
1287 /* timer will be rescheduled in watchdog task */
1288}
1289
1290/**
1291 * i40evf_watchdog_task - Periodic call-back task
1292 * @work: pointer to work_struct
1293 **/
1294static void i40evf_watchdog_task(struct work_struct *work)
1295{
1296 struct i40evf_adapter *adapter = container_of(work,
1297 struct i40evf_adapter,
1298 watchdog_task);
1299 struct i40e_hw *hw = &adapter->hw;
1300
ef8693eb
MW		 1301 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1302 goto restart_watchdog;
1303
1304 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
ef8693eb
MW		 1305 if ((rd32(hw, I40E_VFGEN_RSTAT) & 0x3) == I40E_VFR_VFACTIVE) {
1306 /* A chance for redemption! */
1307 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1308 adapter->state = __I40EVF_STARTUP;
1309 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1310 schedule_delayed_work(&adapter->init_task, 10);
1311 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1312 &adapter->crit_section);
1313 /* Don't reschedule the watchdog, since we've restarted
1314 * the init task. When init_task contacts the PF and
1315 * gets everything set up again, it'll restart the
1316 * watchdog for us. Down, boy. Sit. Stay. Woof.
1317 */
1318 return;
1319 }
1320 adapter->aq_pending = 0;
1321 adapter->aq_required = 0;
1322 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5 1323 goto watchdog_done;
ef8693eb 1324 }
5eae00c5 1325
ef8693eb
MW		 1326 if ((adapter->state < __I40EVF_DOWN) ||
1327 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
5eae00c5
GR		 1328 goto watchdog_done;
1329
ef8693eb
MW		 1330 /* check for reset */
1331 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
5eae00c5
GR		 1332 (rd32(hw, I40E_VFGEN_RSTAT) & 0x3) != I40E_VFR_VFACTIVE) {
1333 adapter->state = __I40EVF_RESETTING;
ef8693eb
MW		 1334 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1335 dev_err(&adapter->pdev->dev, "Hardware reset detected.\n");
1336 dev_info(&adapter->pdev->dev, "Scheduling reset task\n");
5eae00c5 1337 schedule_work(&adapter->reset_task);
ef8693eb
MW		 1338 adapter->aq_pending = 0;
1339 adapter->aq_required = 0;
1340 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 1341 goto watchdog_done;
1342 }
1343
1344 /* Process admin queue tasks. After init, everything gets done
1345 * here so we don't race on the admin queue.
1346 */
1347 if (adapter->aq_pending)
1348 goto watchdog_done;
1349
1350 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1351 i40evf_map_queues(adapter);
1352 goto watchdog_done;
1353 }
1354
1355 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1356 i40evf_add_ether_addrs(adapter);
1357 goto watchdog_done;
1358 }
1359
1360 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1361 i40evf_add_vlans(adapter);
1362 goto watchdog_done;
1363 }
1364
1365 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1366 i40evf_del_ether_addrs(adapter);
1367 goto watchdog_done;
1368 }
1369
1370 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1371 i40evf_del_vlans(adapter);
1372 goto watchdog_done;
1373 }
1374
1375 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1376 i40evf_disable_queues(adapter);
1377 goto watchdog_done;
1378 }
1379
1380 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1381 i40evf_configure_queues(adapter);
1382 goto watchdog_done;
1383 }
1384
1385 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1386 i40evf_enable_queues(adapter);
1387 goto watchdog_done;
1388 }
1389
1390 if (adapter->state == __I40EVF_RUNNING)
1391 i40evf_request_stats(adapter);
1392
1393 i40evf_irq_enable(adapter, true);
1394 i40evf_fire_sw_int(adapter, 0xFF);
ef8693eb 1395
5eae00c5 1396watchdog_done:
ef8693eb
MW		 1397 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1398restart_watchdog:
5eae00c5
GR		 1399 if (adapter->aq_required)
1400 mod_timer(&adapter->watchdog_timer,
1401 jiffies + msecs_to_jiffies(20));
1402 else
1403 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
5eae00c5
GR		 1404 schedule_work(&adapter->adminq_task);
1405}
1406
5b7af02c
MW		 1407/**
1408 * i40evf_configure_rss - increment to next available tx queue
1409 * @adapter: board private structure
1410 * @j: queue counter
1411 *
1412 * Helper function for RSS programming to increment through available
1413 * queus. Returns the next queue value.
1414 **/
96d47704
MW		 1415static int next_queue(struct i40evf_adapter *adapter, int j)
1416{
1417 j += 1;
1418
1419 return j >= adapter->vsi_res->num_queue_pairs ? 0 : j;
1420}
1421
5eae00c5
GR		 1422/**
1423 * i40evf_configure_rss - Prepare for RSS if used
1424 * @adapter: board private structure
1425 **/
1426static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1427{
1428 struct i40e_hw *hw = &adapter->hw;
1429 u32 lut = 0;
1430 int i, j;
1431 u64 hena;
1432
1433 /* Set of random keys generated using kernel random number generator */
1434 static const u32 seed[I40E_VFQF_HKEY_MAX_INDEX + 1] = {
1435 0x794221b4, 0xbca0c5ab, 0x6cd5ebd9, 0x1ada6127,
1436 0x983b3aa1, 0x1c4e71eb, 0x7f6328b2, 0xfcdc0da0,
1437 0xc135cafa, 0x7a6f7e2d, 0xe7102d28, 0x163cd12e,
1438 0x4954b126 };
1439
1440 /* Hash type is configured by the PF - we just supply the key */
1441
1442 /* Fill out hash function seed */
1443 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1444 wr32(hw, I40E_VFQF_HKEY(i), seed[i]);
1445
1446 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1447 hena = I40E_DEFAULT_RSS_HENA;
1448 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1449 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1450
1451 /* Populate the LUT with max no. of queues in round robin fashion */
96d47704
MW		 1452 j = adapter->vsi_res->num_queue_pairs;
1453 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
5b7af02c
MW		 1454 j = next_queue(adapter, j);
1455 lut = j;
1456 j = next_queue(adapter, j);
1457 lut |= j << 8;
1458 j = next_queue(adapter, j);
1459 lut |= j << 16;
1460 j = next_queue(adapter, j);
1461 lut |= j << 24;
96d47704 1462 wr32(hw, I40E_VFQF_HLUT(i), lut);
5eae00c5
GR		 1463 }
1464 i40e_flush(hw);
1465}
1466
ef8693eb
MW		 1467#define I40EVF_RESET_WAIT_MS 100
1468#define I40EVF_RESET_WAIT_COUNT 200
5eae00c5
GR		 1469/**
1470 * i40evf_reset_task - Call-back task to handle hardware reset
1471 * @work: pointer to work_struct
1472 *
1473 * During reset we need to shut down and reinitialize the admin queue
1474 * before we can use it to communicate with the PF again. We also clear
1475 * and reinit the rings because that context is lost as well.
1476 **/
1477static void i40evf_reset_task(struct work_struct *work)
1478{
ef8693eb
MW		 1479 struct i40evf_adapter *adapter = container_of(work,
1480 struct i40evf_adapter,
1481 reset_task);
5eae00c5
GR		 1482 struct i40e_hw *hw = &adapter->hw;
1483 int i = 0, err;
1484 uint32_t rstat_val;
1485
1486 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1487 &adapter->crit_section))
1488 udelay(500);
3526d800
MW		 1489
1490 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1491 dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
1492 i40evf_request_reset(adapter);
1493 }
1494
ef8693eb
MW		 1495 /* poll until we see the reset actually happen */
1496 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1497 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1498 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1499 if (rstat_val != I40E_VFR_VFACTIVE) {
1500 dev_info(&adapter->pdev->dev, "Reset now occurring\n");
1501 break;
1502 } else {
1503 msleep(I40EVF_RESET_WAIT_MS);
1504 }
1505 }
1506 if (i == I40EVF_RESET_WAIT_COUNT) {
1507 dev_err(&adapter->pdev->dev, "Reset was not detected\n");
1508 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1509 goto continue_reset; /* act like the reset happened */
1510 }
5eae00c5 1511
ef8693eb
MW		 1512 /* wait until the reset is complete and the PF is responding to us */
1513 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
5eae00c5
GR		 1514 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1515 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
ef8693eb
MW		 1516 if (rstat_val == I40E_VFR_VFACTIVE) {
1517 dev_info(&adapter->pdev->dev, "Reset is complete. Reinitializing.\n");
5eae00c5 1518 break;
ef8693eb
MW		 1519 } else {
1520 msleep(I40EVF_RESET_WAIT_MS);
1521 }
5eae00c5 1522 }
ef8693eb 1523 if (i == I40EVF_RESET_WAIT_COUNT) {
5eae00c5 1524 /* reset never finished */
ef8693eb
MW		 1525 dev_err(&adapter->pdev->dev, "Reset never finished (%x). PF driver is dead, and so am I.\n",
1526 rstat_val);
1527 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1528
169f4076
MW		 1529 if (netif_running(adapter->netdev)) {
1530 set_bit(__I40E_DOWN, &adapter->vsi.state);
1531 i40evf_down(adapter);
1532 i40evf_free_traffic_irqs(adapter);
1533 i40evf_free_all_tx_resources(adapter);
1534 i40evf_free_all_rx_resources(adapter);
1535 }
ef8693eb
MW		 1536 i40evf_free_misc_irq(adapter);
1537 i40evf_reset_interrupt_capability(adapter);
1538 i40evf_free_queues(adapter);
1539 kfree(adapter->vf_res);
1540 i40evf_shutdown_adminq(hw);
1541 adapter->netdev->flags &= ~IFF_UP;
1542 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1543 return; /* Do not attempt to reinit. It's dead, Jim. */
5eae00c5 1544 }
ef8693eb
MW		 1545
1546continue_reset:
1547 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1548
5eae00c5
GR		 1549 i40evf_down(adapter);
1550 adapter->state = __I40EVF_RESETTING;
1551
1552 /* kill and reinit the admin queue */
1553 if (i40evf_shutdown_adminq(hw))
1554 dev_warn(&adapter->pdev->dev,
1555 "%s: Failed to destroy the Admin Queue resources\n",
1556 __func__);
1557 err = i40evf_init_adminq(hw);
1558 if (err)
1559 dev_info(&adapter->pdev->dev, "%s: init_adminq failed: %d\n",
1560 __func__, err);
1561
1562 adapter->aq_pending = 0;
1563 adapter->aq_required = 0;
1564 i40evf_map_queues(adapter);
1565 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1566
1567 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1568
1569 if (netif_running(adapter->netdev)) {
1570 /* allocate transmit descriptors */
1571 err = i40evf_setup_all_tx_resources(adapter);
1572 if (err)
1573 goto reset_err;
1574
1575 /* allocate receive descriptors */
1576 err = i40evf_setup_all_rx_resources(adapter);
1577 if (err)
1578 goto reset_err;
1579
1580 i40evf_configure(adapter);
1581
1582 err = i40evf_up_complete(adapter);
1583 if (err)
1584 goto reset_err;
1585
1586 i40evf_irq_enable(adapter, true);
1587 }
1588 return;
1589reset_err:
1590 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit.\n");
1591 i40evf_close(adapter->netdev);
1592}
1593
1594/**
1595 * i40evf_adminq_task - worker thread to clean the admin queue
1596 * @work: pointer to work_struct containing our data
1597 **/
1598static void i40evf_adminq_task(struct work_struct *work)
1599{
1600 struct i40evf_adapter *adapter =
1601 container_of(work, struct i40evf_adapter, adminq_task);
1602 struct i40e_hw *hw = &adapter->hw;
1603 struct i40e_arq_event_info event;
1604 struct i40e_virtchnl_msg *v_msg;
1605 i40e_status ret;
1606 u16 pending;
1607
ef8693eb
MW		 1608 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1609 return;
1610
5eae00c5
GR		 1611 event.msg_size = I40EVF_MAX_AQ_BUF_SIZE;
1612 event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
1613 if (!event.msg_buf) {
1614 dev_info(&adapter->pdev->dev, "%s: no memory for ARQ clean\n",
1615 __func__);
1616 return;
1617 }
1618 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1619 do {
1620 ret = i40evf_clean_arq_element(hw, &event, &pending);
1621 if (ret)
1622 break; /* No event to process or error cleaning ARQ */
1623
1624 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1625 v_msg->v_retval, event.msg_buf,
1626 event.msg_size);
1627 if (pending != 0) {
1628 dev_info(&adapter->pdev->dev,
1629 "%s: ARQ: Pending events %d\n",
1630 __func__, pending);
1631 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1632 }
1633 } while (pending);
1634
1635 /* re-enable Admin queue interrupt cause */
1636 i40evf_misc_irq_enable(adapter);
1637
1638 kfree(event.msg_buf);
1639}
1640
1641/**
1642 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1643 * @adapter: board private structure
1644 *
1645 * Free all transmit software resources
1646 **/
1647static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1648{
1649 int i;
1650
1651 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1652 if (adapter->tx_rings[i]->desc)
1653 i40evf_free_tx_resources(adapter->tx_rings[i]);
1654
1655}
1656
1657/**
1658 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1659 * @adapter: board private structure
1660 *
1661 * If this function returns with an error, then it's possible one or
1662 * more of the rings is populated (while the rest are not). It is the
1663 * callers duty to clean those orphaned rings.
1664 *
1665 * Return 0 on success, negative on failure
1666 **/
1667static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1668{
1669 int i, err = 0;
1670
1671 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
d732a184 1672 adapter->tx_rings[i]->count = adapter->tx_desc_count;
5eae00c5
GR		 1673 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1674 if (!err)
1675 continue;
1676 dev_err(&adapter->pdev->dev,
1677 "%s: Allocation for Tx Queue %u failed\n",
1678 __func__, i);
1679 break;
1680 }
1681
1682 return err;
1683}
1684
1685/**
1686 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1687 * @adapter: board private structure
1688 *
1689 * If this function returns with an error, then it's possible one or
1690 * more of the rings is populated (while the rest are not). It is the
1691 * callers duty to clean those orphaned rings.
1692 *
1693 * Return 0 on success, negative on failure
1694 **/
1695static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1696{
1697 int i, err = 0;
1698
1699 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
d732a184 1700 adapter->rx_rings[i]->count = adapter->rx_desc_count;
5eae00c5
GR		 1701 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1702 if (!err)
1703 continue;
1704 dev_err(&adapter->pdev->dev,
1705 "%s: Allocation for Rx Queue %u failed\n",
1706 __func__, i);
1707 break;
1708 }
1709 return err;
1710}
1711
1712/**
1713 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1714 * @adapter: board private structure
1715 *
1716 * Free all receive software resources
1717 **/
1718static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1719{
1720 int i;
1721
1722 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1723 if (adapter->rx_rings[i]->desc)
1724 i40evf_free_rx_resources(adapter->rx_rings[i]);
1725}
1726
1727/**
1728 * i40evf_open - Called when a network interface is made active
1729 * @netdev: network interface device structure
1730 *
1731 * Returns 0 on success, negative value on failure
1732 *
1733 * The open entry point is called when a network interface is made
1734 * active by the system (IFF_UP). At this point all resources needed
1735 * for transmit and receive operations are allocated, the interrupt
1736 * handler is registered with the OS, the watchdog timer is started,
1737 * and the stack is notified that the interface is ready.
1738 **/
1739static int i40evf_open(struct net_device *netdev)
1740{
1741 struct i40evf_adapter *adapter = netdev_priv(netdev);
1742 int err;
1743
ef8693eb
MW		 1744 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1745 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1746 return -EIO;
1747 }
5eae00c5
GR		 1748 if (adapter->state != __I40EVF_DOWN)
1749 return -EBUSY;
1750
1751 /* allocate transmit descriptors */
1752 err = i40evf_setup_all_tx_resources(adapter);
1753 if (err)
1754 goto err_setup_tx;
1755
1756 /* allocate receive descriptors */
1757 err = i40evf_setup_all_rx_resources(adapter);
1758 if (err)
1759 goto err_setup_rx;
1760
1761 /* clear any pending interrupts, may auto mask */
1762 err = i40evf_request_traffic_irqs(adapter, netdev->name);
1763 if (err)
1764 goto err_req_irq;
1765
1766 i40evf_configure(adapter);
1767
1768 err = i40evf_up_complete(adapter);
1769 if (err)
1770 goto err_req_irq;
1771
1772 i40evf_irq_enable(adapter, true);
1773
1774 return 0;
1775
1776err_req_irq:
1777 i40evf_down(adapter);
1778 i40evf_free_traffic_irqs(adapter);
1779err_setup_rx:
1780 i40evf_free_all_rx_resources(adapter);
1781err_setup_tx:
1782 i40evf_free_all_tx_resources(adapter);
1783
1784 return err;
1785}
1786
1787/**
1788 * i40evf_close - Disables a network interface
1789 * @netdev: network interface device structure
1790 *
1791 * Returns 0, this is not allowed to fail
1792 *
1793 * The close entry point is called when an interface is de-activated
1794 * by the OS. The hardware is still under the drivers control, but
1795 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1796 * are freed, along with all transmit and receive resources.
1797 **/
1798static int i40evf_close(struct net_device *netdev)
1799{
1800 struct i40evf_adapter *adapter = netdev_priv(netdev);
1801
ef8693eb
MW		 1802 if (adapter->state <= __I40EVF_DOWN)
1803 return 0;
1804
5eae00c5
GR		 1805 /* signal that we are down to the interrupt handler */
1806 adapter->state = __I40EVF_DOWN;
ef8693eb 1807
5eae00c5
GR		 1808 set_bit(__I40E_DOWN, &adapter->vsi.state);
1809
1810 i40evf_down(adapter);
1811 i40evf_free_traffic_irqs(adapter);
1812
1813 i40evf_free_all_tx_resources(adapter);
1814 i40evf_free_all_rx_resources(adapter);
1815
1816 return 0;
1817}
1818
1819/**
1820 * i40evf_get_stats - Get System Network Statistics
1821 * @netdev: network interface device structure
1822 *
1823 * Returns the address of the device statistics structure.
1824 * The statistics are actually updated from the timer callback.
1825 **/
1826static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1827{
1828 struct i40evf_adapter *adapter = netdev_priv(netdev);
1829
1830 /* only return the current stats */
1831 return &adapter->net_stats;
1832}
1833
1834/**
1835 * i40evf_reinit_locked - Software reinit
1836 * @adapter: board private structure
1837 *
1838 * Reinititalizes the ring structures in response to a software configuration
1839 * change. Roughly the same as close followed by open, but skips releasing
1840 * and reallocating the interrupts.
1841 **/
1842void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1843{
1844 struct net_device *netdev = adapter->netdev;
1845 int err;
1846
1847 WARN_ON(in_interrupt());
1848
5eae00c5
GR		 1849 i40evf_down(adapter);
1850
1851 /* allocate transmit descriptors */
1852 err = i40evf_setup_all_tx_resources(adapter);
1853 if (err)
1854 goto err_reinit;
1855
1856 /* allocate receive descriptors */
1857 err = i40evf_setup_all_rx_resources(adapter);
1858 if (err)
1859 goto err_reinit;
1860
1861 i40evf_configure(adapter);
1862
1863 err = i40evf_up_complete(adapter);
1864 if (err)
1865 goto err_reinit;
1866
1867 i40evf_irq_enable(adapter, true);
1868 return;
1869
1870err_reinit:
1871 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit.\n");
1872 i40evf_close(netdev);
1873}
1874
1875/**
1876 * i40evf_change_mtu - Change the Maximum Transfer Unit
1877 * @netdev: network interface device structure
1878 * @new_mtu: new value for maximum frame size
1879 *
1880 * Returns 0 on success, negative on failure
1881 **/
1882static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1883{
1884 struct i40evf_adapter *adapter = netdev_priv(netdev);
1885 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1886
1887 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1888 return -EINVAL;
1889
1890 /* must set new MTU before calling down or up */
1891 netdev->mtu = new_mtu;
1892 i40evf_reinit_locked(adapter);
1893 return 0;
1894}
1895
1896static const struct net_device_ops i40evf_netdev_ops = {
1897 .ndo_open = i40evf_open,
1898 .ndo_stop = i40evf_close,
1899 .ndo_start_xmit = i40evf_xmit_frame,
1900 .ndo_get_stats = i40evf_get_stats,
1901 .ndo_set_rx_mode = i40evf_set_rx_mode,
1902 .ndo_validate_addr = eth_validate_addr,
1903 .ndo_set_mac_address = i40evf_set_mac,
1904 .ndo_change_mtu = i40evf_change_mtu,
1905 .ndo_tx_timeout = i40evf_tx_timeout,
1906 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
1907 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
1908};
1909
1910/**
1911 * i40evf_check_reset_complete - check that VF reset is complete
1912 * @hw: pointer to hw struct
1913 *
1914 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1915 **/
1916static int i40evf_check_reset_complete(struct i40e_hw *hw)
1917{
1918 u32 rstat;
1919 int i;
1920
1921 for (i = 0; i < 100; i++) {
1922 rstat = rd32(hw, I40E_VFGEN_RSTAT);
1923 if (rstat == I40E_VFR_VFACTIVE)
1924 return 0;
1925 udelay(10);
1926 }
1927 return -EBUSY;
1928}
1929
1930/**
1931 * i40evf_init_task - worker thread to perform delayed initialization
1932 * @work: pointer to work_struct containing our data
1933 *
1934 * This task completes the work that was begun in probe. Due to the nature
1935 * of VF-PF communications, we may need to wait tens of milliseconds to get
1936 * reponses back from the PF. Rather than busy-wait in probe and bog down the
1937 * whole system, we'll do it in a task so we can sleep.
1938 * This task only runs during driver init. Once we've established
1939 * communications with the PF driver and set up our netdev, the watchdog
1940 * takes over.
1941 **/
1942static void i40evf_init_task(struct work_struct *work)
1943{
1944 struct i40evf_adapter *adapter = container_of(work,
1945 struct i40evf_adapter,
1946 init_task.work);
1947 struct net_device *netdev = adapter->netdev;
1948 struct i40evf_mac_filter *f;
1949 struct i40e_hw *hw = &adapter->hw;
1950 struct pci_dev *pdev = adapter->pdev;
1951 int i, err, bufsz;
1952
1953 switch (adapter->state) {
1954 case __I40EVF_STARTUP:
1955 /* driver loaded, probe complete */
ef8693eb
MW		 1956 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1957 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
5eae00c5
GR		 1958 err = i40e_set_mac_type(hw);
1959 if (err) {
c2a137cb
MW		 1960 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
1961 err);
5eae00c5
GR		 1962 goto err;
1963 }
1964 err = i40evf_check_reset_complete(hw);
1965 if (err) {
0d9c7ea8 1966 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
c2a137cb 1967 err);
5eae00c5
GR		 1968 goto err;
1969 }
1970 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
1971 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
1972 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1973 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1974
1975 err = i40evf_init_adminq(hw);
1976 if (err) {
c2a137cb
MW		 1977 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
1978 err);
5eae00c5
GR		 1979 goto err;
1980 }
1981 err = i40evf_send_api_ver(adapter);
1982 if (err) {
10bdd67b 1983 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
5eae00c5
GR		 1984 i40evf_shutdown_adminq(hw);
1985 goto err;
1986 }
1987 adapter->state = __I40EVF_INIT_VERSION_CHECK;
1988 goto restart;
1989 break;
1990 case __I40EVF_INIT_VERSION_CHECK:
10bdd67b
MW		 1991 if (!i40evf_asq_done(hw)) {
1992 dev_err(&pdev->dev, "Admin queue command never completed.\n");
5eae00c5 1993 goto err;
10bdd67b 1994 }
5eae00c5
GR		 1995
1996 /* aq msg sent, awaiting reply */
1997 err = i40evf_verify_api_ver(adapter);
1998 if (err) {
0d9c7ea8 1999 dev_info(&pdev->dev, "Unable to verify API version (%d), retrying\n",
5eae00c5
GR		 2000 err);
2001 goto err;
2002 }
2003 err = i40evf_send_vf_config_msg(adapter);
2004 if (err) {
c2a137cb 2005 dev_err(&pdev->dev, "Unable send config request (%d)\n",
5eae00c5
GR		 2006 err);
2007 goto err;
2008 }
2009 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2010 goto restart;
2011 break;
2012 case __I40EVF_INIT_GET_RESOURCES:
2013 /* aq msg sent, awaiting reply */
2014 if (!adapter->vf_res) {
2015 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2016 (I40E_MAX_VF_VSI *
2017 sizeof(struct i40e_virtchnl_vsi_resource));
2018 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
c2a137cb 2019 if (!adapter->vf_res)
5eae00c5 2020 goto err;
5eae00c5
GR		 2021 }
2022 err = i40evf_get_vf_config(adapter);
2023 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2024 goto restart;
2025 if (err) {
c2a137cb
MW		 2026 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2027 err);
5eae00c5
GR		 2028 goto err_alloc;
2029 }
2030 adapter->state = __I40EVF_INIT_SW;
2031 break;
2032 default:
2033 goto err_alloc;
2034 }
2035 /* got VF config message back from PF, now we can parse it */
2036 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2037 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2038 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2039 }
2040 if (!adapter->vsi_res) {
c2a137cb 2041 dev_err(&pdev->dev, "No LAN VSI found\n");
5eae00c5
GR		 2042 goto err_alloc;
2043 }
2044
2045 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2046
5eae00c5
GR		 2047 netdev->netdev_ops = &i40evf_netdev_ops;
2048 i40evf_set_ethtool_ops(netdev);
2049 netdev->watchdog_timeo = 5 * HZ;
dbbd8111
MW		 2050 netdev->features |= NETIF_F_HIGHDMA |
2051 NETIF_F_SG |
5eae00c5
GR		 2052 NETIF_F_IP_CSUM |
2053 NETIF_F_SCTP_CSUM |
2054 NETIF_F_IPV6_CSUM |
2055 NETIF_F_TSO |
2056 NETIF_F_TSO6 |
3415e8ce 2057 NETIF_F_RXCSUM |
5eae00c5
GR		 2058 NETIF_F_GRO;
2059
2060 if (adapter->vf_res->vf_offload_flags
2061 & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2062 netdev->vlan_features = netdev->features;
2063 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2064 NETIF_F_HW_VLAN_CTAG_RX |
2065 NETIF_F_HW_VLAN_CTAG_FILTER;
2066 }
2067
3415e8ce
GR		 2068 /* copy netdev features into list of user selectable features */
2069 netdev->hw_features |= netdev->features;
2070 netdev->hw_features &= ~NETIF_F_RXCSUM;
2071
5eae00c5 2072 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
c2a137cb
MW		 2073 dev_info(&pdev->dev, "Invalid MAC address %pMAC, using random\n",
2074 adapter->hw.mac.addr);
5eae00c5
GR		 2075 random_ether_addr(adapter->hw.mac.addr);
2076 }
2077 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
2078 memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
2079
2080 INIT_LIST_HEAD(&adapter->mac_filter_list);
2081 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2082 f = kzalloc(sizeof(*f), GFP_ATOMIC);
2083 if (NULL == f)
2084 goto err_sw_init;
2085
2086 memcpy(f->macaddr, adapter->hw.mac.addr, ETH_ALEN);
2087 f->add = true;
2088 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2089
2090 list_add(&f->list, &adapter->mac_filter_list);
2091
2092 init_timer(&adapter->watchdog_timer);
2093 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2094 adapter->watchdog_timer.data = (unsigned long)adapter;
2095 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2096
d732a184
MW		 2097 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2098 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
5eae00c5
GR		 2099 err = i40evf_init_interrupt_scheme(adapter);
2100 if (err)
2101 goto err_sw_init;
2102 i40evf_map_rings_to_vectors(adapter);
2103 i40evf_configure_rss(adapter);
2104 err = i40evf_request_misc_irq(adapter);
2105 if (err)
2106 goto err_sw_init;
2107
2108 netif_carrier_off(netdev);
2109
5eae00c5
GR		 2110 adapter->vsi.id = adapter->vsi_res->vsi_id;
2111 adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2112 adapter->vsi.back = adapter;
2113 adapter->vsi.base_vector = 1;
2114 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
ca99eb99
MW		 2115 adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2116 ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2117 adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2118 ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
5eae00c5
GR		 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);
5eae00c5
GR		 2160}
2161
2162/**
2163 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2164 * @pdev: pci device structure
2165 **/
2166static void i40evf_shutdown(struct pci_dev *pdev)
2167{
2168 struct net_device *netdev = pci_get_drvdata(pdev);
2169
2170 netif_device_detach(netdev);
2171
2172 if (netif_running(netdev))
2173 i40evf_close(netdev);
2174
2175#ifdef CONFIG_PM
2176 pci_save_state(pdev);
2177
2178#endif
2179 pci_disable_device(pdev);
2180}
2181
2182/**
2183 * i40evf_probe - Device Initialization Routine
2184 * @pdev: PCI device information struct
2185 * @ent: entry in i40evf_pci_tbl
2186 *
2187 * Returns 0 on success, negative on failure
2188 *
2189 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2190 * The OS initialization, configuring of the adapter private structure,
2191 * and a hardware reset occur.
2192 **/
2193static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2194{
2195 struct net_device *netdev;
2196 struct i40evf_adapter *adapter = NULL;
2197 struct i40e_hw *hw = NULL;
dbbd8111 2198 int err;
5eae00c5
GR		 2199
2200 err = pci_enable_device(pdev);
2201 if (err)
2202 return err;
2203
6494294f 2204 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
6494294f 2205 if (err) {
e3e3bfdd
JS		 2206 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2207 if (err) {
2208 dev_err(&pdev->dev,
2209 "DMA configuration failed: 0x%x\n", err);
2210 goto err_dma;
2211 }
5eae00c5
GR		 2212 }
2213
2214 err = pci_request_regions(pdev, i40evf_driver_name);
2215 if (err) {
2216 dev_err(&pdev->dev,
2217 "pci_request_regions failed 0x%x\n", err);
2218 goto err_pci_reg;
2219 }
2220
2221 pci_enable_pcie_error_reporting(pdev);
2222
2223 pci_set_master(pdev);
2224
2225 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2226 MAX_TX_QUEUES);
2227 if (!netdev) {
2228 err = -ENOMEM;
2229 goto err_alloc_etherdev;
2230 }
2231
2232 SET_NETDEV_DEV(netdev, &pdev->dev);
2233
2234 pci_set_drvdata(pdev, netdev);
2235 adapter = netdev_priv(netdev);
5eae00c5
GR		 2236
2237 adapter->netdev = netdev;
2238 adapter->pdev = pdev;
2239
2240 hw = &adapter->hw;
2241 hw->back = adapter;
2242
2243 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2244 adapter->state = __I40EVF_STARTUP;
2245
2246 /* Call save state here because it relies on the adapter struct. */
2247 pci_save_state(pdev);
2248
2249 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2250 pci_resource_len(pdev, 0));
2251 if (!hw->hw_addr) {
2252 err = -EIO;
2253 goto err_ioremap;
2254 }
2255 hw->vendor_id = pdev->vendor;
2256 hw->device_id = pdev->device;
2257 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2258 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2259 hw->subsystem_device_id = pdev->subsystem_device;
2260 hw->bus.device = PCI_SLOT(pdev->devfn);
2261 hw->bus.func = PCI_FUNC(pdev->devfn);
2262
2263 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2264 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2265 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2266 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2267 schedule_delayed_work(&adapter->init_task, 10);
2268
2269 return 0;
2270
2271err_ioremap:
2272 free_netdev(netdev);
2273err_alloc_etherdev:
2274 pci_release_regions(pdev);
2275err_pci_reg:
2276err_dma:
2277 pci_disable_device(pdev);
2278 return err;
2279}
2280
2281#ifdef CONFIG_PM
2282/**
2283 * i40evf_suspend - Power management suspend routine
2284 * @pdev: PCI device information struct
2285 * @state: unused
2286 *
2287 * Called when the system (VM) is entering sleep/suspend.
2288 **/
2289static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2290{
2291 struct net_device *netdev = pci_get_drvdata(pdev);
2292 struct i40evf_adapter *adapter = netdev_priv(netdev);
2293 int retval = 0;
2294
2295 netif_device_detach(netdev);
2296
2297 if (netif_running(netdev)) {
2298 rtnl_lock();
2299 i40evf_down(adapter);
2300 rtnl_unlock();
2301 }
2302 i40evf_free_misc_irq(adapter);
2303 i40evf_reset_interrupt_capability(adapter);
2304
2305 retval = pci_save_state(pdev);
2306 if (retval)
2307 return retval;
2308
2309 pci_disable_device(pdev);
2310
2311 return 0;
2312}
2313
2314/**
2315 * i40evf_resume - Power managment resume routine
2316 * @pdev: PCI device information struct
2317 *
2318 * Called when the system (VM) is resumed from sleep/suspend.
2319 **/
2320static int i40evf_resume(struct pci_dev *pdev)
2321{
2322 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2323 struct net_device *netdev = adapter->netdev;
2324 u32 err;
2325
2326 pci_set_power_state(pdev, PCI_D0);
2327 pci_restore_state(pdev);
2328 /* pci_restore_state clears dev->state_saved so call
2329 * pci_save_state to restore it.
2330 */
2331 pci_save_state(pdev);
2332
2333 err = pci_enable_device_mem(pdev);
2334 if (err) {
2335 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2336 return err;
2337 }
2338 pci_set_master(pdev);
2339
2340 rtnl_lock();
2341 err = i40evf_set_interrupt_capability(adapter);
2342 if (err) {
2343 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2344 return err;
2345 }
2346 err = i40evf_request_misc_irq(adapter);
2347 rtnl_unlock();
2348 if (err) {
2349 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2350 return err;
2351 }
2352
2353 schedule_work(&adapter->reset_task);
2354
2355 netif_device_attach(netdev);
2356
2357 return err;
2358}
2359
2360#endif /* CONFIG_PM */
2361/**
2362 * i40evf_remove - Device Removal Routine
2363 * @pdev: PCI device information struct
2364 *
2365 * i40evf_remove is called by the PCI subsystem to alert the driver
2366 * that it should release a PCI device. The could be caused by a
2367 * Hot-Plug event, or because the driver is going to be removed from
2368 * memory.
2369 **/
2370static void i40evf_remove(struct pci_dev *pdev)
2371{
2372 struct net_device *netdev = pci_get_drvdata(pdev);
2373 struct i40evf_adapter *adapter = netdev_priv(netdev);
2374 struct i40e_hw *hw = &adapter->hw;
2375
2376 cancel_delayed_work_sync(&adapter->init_task);
ef8693eb 2377 cancel_work_sync(&adapter->reset_task);
5eae00c5
GR		 2378
2379 if (adapter->netdev_registered) {
2380 unregister_netdev(netdev);
2381 adapter->netdev_registered = false;
2382 }
2383 adapter->state = __I40EVF_REMOVE;
2384
dbb01c8a 2385 if (adapter->msix_entries) {
5eae00c5 2386 i40evf_misc_irq_disable(adapter);
5eae00c5 2387 i40evf_free_misc_irq(adapter);
5eae00c5
GR		 2388 i40evf_reset_interrupt_capability(adapter);
2389 }
2390
dbb01c8a
MW		 2391 del_timer_sync(&adapter->watchdog_timer);
2392 flush_scheduled_work();
2393
5eae00c5
GR		 2394 if (hw->aq.asq.count)
2395 i40evf_shutdown_adminq(hw);
2396
2397 iounmap(hw->hw_addr);
2398 pci_release_regions(pdev);
2399
2400 i40evf_free_queues(adapter);
2401 kfree(adapter->vf_res);
2402
2403 free_netdev(netdev);
2404
2405 pci_disable_pcie_error_reporting(pdev);
2406
2407 pci_disable_device(pdev);
2408}
2409
2410static struct pci_driver i40evf_driver = {
2411 .name = i40evf_driver_name,
2412 .id_table = i40evf_pci_tbl,
2413 .probe = i40evf_probe,
2414 .remove = i40evf_remove,
2415#ifdef CONFIG_PM
2416 .suspend = i40evf_suspend,
2417 .resume = i40evf_resume,
2418#endif
2419 .shutdown = i40evf_shutdown,
2420};
2421
2422/**
2423 * i40e_init_module - Driver Registration Routine
2424 *
2425 * i40e_init_module is the first routine called when the driver is
2426 * loaded. All it does is register with the PCI subsystem.
2427 **/
2428static int __init i40evf_init_module(void)
2429{
2430 int ret;
2431 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2432 i40evf_driver_version);
2433
2434 pr_info("%s\n", i40evf_copyright);
2435
2436 ret = pci_register_driver(&i40evf_driver);
2437 return ret;
2438}
2439
2440module_init(i40evf_init_module);
2441
2442/**
2443 * i40e_exit_module - Driver Exit Cleanup Routine
2444 *
2445 * i40e_exit_module is called just before the driver is removed
2446 * from memory.
2447 **/
2448static void __exit i40evf_exit_module(void)
2449{
2450 pci_unregister_driver(&i40evf_driver);
2451}
2452
2453module_exit(i40evf_exit_module);
2454
2455/* i40evf_main.c */
Linux kernel - Deliverables
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