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i40evf: clean up log message formatting
[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 175 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) {
3526d800 176 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
625777e3
MW		 177 schedule_work(&adapter->reset_task);
178 }
5eae00c5
GR		 179}
180
181/**
182 * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
183 * @adapter: board private structure
184 **/
185static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
186{
187 struct i40e_hw *hw = &adapter->hw;
188 wr32(hw, I40E_VFINT_DYN_CTL01, 0);
189
190 /* read flush */
191 rd32(hw, I40E_VFGEN_RSTAT);
192
193 synchronize_irq(adapter->msix_entries[0].vector);
194}
195
196/**
197 * i40evf_misc_irq_enable - Enable default interrupt generation settings
198 * @adapter: board private structure
199 **/
200static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
201{
202 struct i40e_hw *hw = &adapter->hw;
203 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
204 I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
205 wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA_ADMINQ_MASK);
206
207 /* read flush */
208 rd32(hw, I40E_VFGEN_RSTAT);
209}
210
211/**
212 * i40evf_irq_disable - Mask off interrupt generation on the NIC
213 * @adapter: board private structure
214 **/
215static void i40evf_irq_disable(struct i40evf_adapter *adapter)
216{
217 int i;
218 struct i40e_hw *hw = &adapter->hw;
219
dbb01c8a
MW		 220 if (!adapter->msix_entries)
221 return;
222
5eae00c5
GR		 223 for (i = 1; i < adapter->num_msix_vectors; i++) {
224 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
225 synchronize_irq(adapter->msix_entries[i].vector);
226 }
227 /* read flush */
228 rd32(hw, I40E_VFGEN_RSTAT);
229
230}
231
232/**
233 * i40evf_irq_enable_queues - Enable interrupt for specified queues
234 * @adapter: board private structure
235 * @mask: bitmap of queues to enable
236 **/
237void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
238{
239 struct i40e_hw *hw = &adapter->hw;
240 int i;
241
242 for (i = 1; i < adapter->num_msix_vectors; i++) {
243 if (mask & (1 << (i - 1))) {
244 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
245 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
246 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
247 }
248 }
249}
250
251/**
252 * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
253 * @adapter: board private structure
254 * @mask: bitmap of vectors to trigger
255 **/
256static void i40evf_fire_sw_int(struct i40evf_adapter *adapter,
257 u32 mask)
258{
259 struct i40e_hw *hw = &adapter->hw;
260 int i;
261 uint32_t dyn_ctl;
262
263 for (i = 1; i < adapter->num_msix_vectors; i++) {
264 if (mask & (1 << i)) {
265 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
266 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
267 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
268 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
269 }
270 }
271}
272
273/**
274 * i40evf_irq_enable - Enable default interrupt generation settings
275 * @adapter: board private structure
276 **/
277void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
278{
279 struct i40e_hw *hw = &adapter->hw;
280
281 i40evf_irq_enable_queues(adapter, ~0);
282
283 if (flush)
284 rd32(hw, I40E_VFGEN_RSTAT);
285}
286
287/**
288 * i40evf_msix_aq - Interrupt handler for vector 0
289 * @irq: interrupt number
290 * @data: pointer to netdev
291 **/
292static irqreturn_t i40evf_msix_aq(int irq, void *data)
293{
294 struct net_device *netdev = data;
295 struct i40evf_adapter *adapter = netdev_priv(netdev);
296 struct i40e_hw *hw = &adapter->hw;
297 u32 val;
298 u32 ena_mask;
299
300 /* handle non-queue interrupts */
301 val = rd32(hw, I40E_VFINT_ICR01);
302 ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
303
304
305 val = rd32(hw, I40E_VFINT_DYN_CTL01);
306 val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
307 wr32(hw, I40E_VFINT_DYN_CTL01, val);
308
309 /* re-enable interrupt causes */
310 wr32(hw, I40E_VFINT_ICR0_ENA1, ena_mask);
311 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK);
312
313 /* schedule work on the private workqueue */
314 schedule_work(&adapter->adminq_task);
315
316 return IRQ_HANDLED;
317}
318
319/**
320 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
321 * @irq: interrupt number
322 * @data: pointer to a q_vector
323 **/
324static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
325{
326 struct i40e_q_vector *q_vector = data;
327
328 if (!q_vector->tx.ring && !q_vector->rx.ring)
329 return IRQ_HANDLED;
330
331 napi_schedule(&q_vector->napi);
332
333 return IRQ_HANDLED;
334}
335
336/**
337 * i40evf_map_vector_to_rxq - associate irqs with rx queues
338 * @adapter: board private structure
339 * @v_idx: interrupt number
340 * @r_idx: queue number
341 **/
342static void
343i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
344{
345 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
346 struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
347
348 rx_ring->q_vector = q_vector;
349 rx_ring->next = q_vector->rx.ring;
350 rx_ring->vsi = &adapter->vsi;
351 q_vector->rx.ring = rx_ring;
352 q_vector->rx.count++;
353 q_vector->rx.latency_range = I40E_LOW_LATENCY;
354}
355
356/**
357 * i40evf_map_vector_to_txq - associate irqs with tx queues
358 * @adapter: board private structure
359 * @v_idx: interrupt number
360 * @t_idx: queue number
361 **/
362static void
363i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
364{
365 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
366 struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
367
368 tx_ring->q_vector = q_vector;
369 tx_ring->next = q_vector->tx.ring;
370 tx_ring->vsi = &adapter->vsi;
371 q_vector->tx.ring = tx_ring;
372 q_vector->tx.count++;
373 q_vector->tx.latency_range = I40E_LOW_LATENCY;
374 q_vector->num_ringpairs++;
375 q_vector->ring_mask |= (1 << t_idx);
376}
377
378/**
379 * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
380 * @adapter: board private structure to initialize
381 *
382 * This function maps descriptor rings to the queue-specific vectors
383 * we were allotted through the MSI-X enabling code. Ideally, we'd have
384 * one vector per ring/queue, but on a constrained vector budget, we
385 * group the rings as "efficiently" as possible. You would add new
386 * mapping configurations in here.
387 **/
388static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
389{
390 int q_vectors;
391 int v_start = 0;
392 int rxr_idx = 0, txr_idx = 0;
393 int rxr_remaining = adapter->vsi_res->num_queue_pairs;
394 int txr_remaining = adapter->vsi_res->num_queue_pairs;
395 int i, j;
396 int rqpv, tqpv;
397 int err = 0;
398
399 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
400
401 /* The ideal configuration...
402 * We have enough vectors to map one per queue.
403 */
404 if (q_vectors == (rxr_remaining * 2)) {
405 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
406 i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
407
408 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
409 i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
410 goto out;
411 }
412
413 /* If we don't have enough vectors for a 1-to-1
414 * mapping, we'll have to group them so there are
415 * multiple queues per vector.
416 * Re-adjusting *qpv takes care of the remainder.
417 */
418 for (i = v_start; i < q_vectors; i++) {
419 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
420 for (j = 0; j < rqpv; j++) {
421 i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
422 rxr_idx++;
423 rxr_remaining--;
424 }
425 }
426 for (i = v_start; i < q_vectors; i++) {
427 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
428 for (j = 0; j < tqpv; j++) {
429 i40evf_map_vector_to_txq(adapter, i, txr_idx);
430 txr_idx++;
431 txr_remaining--;
432 }
433 }
434
435out:
436 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
437
438 return err;
439}
440
441/**
442 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
443 * @adapter: board private structure
444 *
445 * Allocates MSI-X vectors for tx and rx handling, and requests
446 * interrupts from the kernel.
447 **/
448static int
449i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
450{
451 int vector, err, q_vectors;
452 int rx_int_idx = 0, tx_int_idx = 0;
453
454 i40evf_irq_disable(adapter);
455 /* Decrement for Other and TCP Timer vectors */
456 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
457
458 for (vector = 0; vector < q_vectors; vector++) {
459 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
460
461 if (q_vector->tx.ring && q_vector->rx.ring) {
462 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
463 "i40evf-%s-%s-%d", basename,
464 "TxRx", rx_int_idx++);
465 tx_int_idx++;
466 } else if (q_vector->rx.ring) {
467 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
468 "i40evf-%s-%s-%d", basename,
469 "rx", rx_int_idx++);
470 } else if (q_vector->tx.ring) {
471 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
472 "i40evf-%s-%s-%d", basename,
473 "tx", tx_int_idx++);
474 } else {
475 /* skip this unused q_vector */
476 continue;
477 }
478 err = request_irq(
479 adapter->msix_entries[vector + NONQ_VECS].vector,
480 i40evf_msix_clean_rings,
481 0,
482 q_vector->name,
483 q_vector);
484 if (err) {
485 dev_info(&adapter->pdev->dev,
486 "%s: request_irq failed, error: %d\n",
487 __func__, err);
488 goto free_queue_irqs;
489 }
490 /* assign the mask for this irq */
491 irq_set_affinity_hint(
492 adapter->msix_entries[vector + NONQ_VECS].vector,
493 q_vector->affinity_mask);
494 }
495
496 return 0;
497
498free_queue_irqs:
499 while (vector) {
500 vector--;
501 irq_set_affinity_hint(
502 adapter->msix_entries[vector + NONQ_VECS].vector,
503 NULL);
504 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
505 adapter->q_vector[vector]);
506 }
507 return err;
508}
509
510/**
511 * i40evf_request_misc_irq - Initialize MSI-X interrupts
512 * @adapter: board private structure
513 *
514 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
515 * vector is only for the admin queue, and stays active even when the netdev
516 * is closed.
517 **/
518static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
519{
520 struct net_device *netdev = adapter->netdev;
521 int err;
522
e1dfee8e 523 sprintf(adapter->misc_vector_name, "i40evf:mbx");
5eae00c5 524 err = request_irq(adapter->msix_entries[0].vector,
e1dfee8e
MW		 525 &i40evf_msix_aq, 0,
526 adapter->misc_vector_name, netdev);
5eae00c5
GR		 527 if (err) {
528 dev_err(&adapter->pdev->dev,
77fa28be
CS		 529 "request_irq for %s failed: %d\n",
530 adapter->misc_vector_name, err);
5eae00c5
GR		 531 free_irq(adapter->msix_entries[0].vector, netdev);
532 }
533 return err;
534}
535
536/**
537 * i40evf_free_traffic_irqs - Free MSI-X interrupts
538 * @adapter: board private structure
539 *
540 * Frees all MSI-X vectors other than 0.
541 **/
542static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
543{
544 int i;
545 int q_vectors;
546 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
547
548 for (i = 0; i < q_vectors; i++) {
549 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
550 NULL);
551 free_irq(adapter->msix_entries[i+1].vector,
552 adapter->q_vector[i]);
553 }
554}
555
556/**
557 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
558 * @adapter: board private structure
559 *
560 * Frees MSI-X vector 0.
561 **/
562static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
563{
564 struct net_device *netdev = adapter->netdev;
565
566 free_irq(adapter->msix_entries[0].vector, netdev);
567}
568
569/**
570 * i40evf_configure_tx - Configure Transmit Unit after Reset
571 * @adapter: board private structure
572 *
573 * Configure the Tx unit of the MAC after a reset.
574 **/
575static void i40evf_configure_tx(struct i40evf_adapter *adapter)
576{
577 struct i40e_hw *hw = &adapter->hw;
578 int i;
579 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
580 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
581}
582
583/**
584 * i40evf_configure_rx - Configure Receive Unit after Reset
585 * @adapter: board private structure
586 *
587 * Configure the Rx unit of the MAC after a reset.
588 **/
589static void i40evf_configure_rx(struct i40evf_adapter *adapter)
590{
591 struct i40e_hw *hw = &adapter->hw;
592 struct net_device *netdev = adapter->netdev;
593 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
594 int i;
595 int rx_buf_len;
596
597
598 adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
599 adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
600
601 /* Decide whether to use packet split mode or not */
602 if (netdev->mtu > ETH_DATA_LEN) {
603 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
604 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
605 else
606 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
607 } else {
608 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
609 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
610 else
611 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
612 }
613
614 /* Set the RX buffer length according to the mode */
615 if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
616 rx_buf_len = I40E_RX_HDR_SIZE;
617 } else {
618 if (netdev->mtu <= ETH_DATA_LEN)
619 rx_buf_len = I40EVF_RXBUFFER_2048;
620 else
621 rx_buf_len = ALIGN(max_frame, 1024);
622 }
623
624 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
625 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
626 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
627 }
628}
629
630/**
631 * i40evf_find_vlan - Search filter list for specific vlan filter
632 * @adapter: board private structure
633 * @vlan: vlan tag
634 *
635 * Returns ptr to the filter object or NULL
636 **/
637static struct
638i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
639{
640 struct i40evf_vlan_filter *f;
641
642 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
643 if (vlan == f->vlan)
644 return f;
645 }
646 return NULL;
647}
648
649/**
650 * i40evf_add_vlan - Add a vlan filter to the list
651 * @adapter: board private structure
652 * @vlan: VLAN tag
653 *
654 * Returns ptr to the filter object or NULL when no memory available.
655 **/
656static struct
657i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
658{
659 struct i40evf_vlan_filter *f;
660
661 f = i40evf_find_vlan(adapter, vlan);
662 if (NULL == f) {
663 f = kzalloc(sizeof(*f), GFP_ATOMIC);
249c8b8d 664 if (NULL == f)
5eae00c5 665 return NULL;
249c8b8d 666
5eae00c5
GR		 667 f->vlan = vlan;
668
669 INIT_LIST_HEAD(&f->list);
670 list_add(&f->list, &adapter->vlan_filter_list);
671 f->add = true;
672 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
673 }
674
675 return f;
676}
677
678/**
679 * i40evf_del_vlan - Remove a vlan filter from the list
680 * @adapter: board private structure
681 * @vlan: VLAN tag
682 **/
683static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
684{
685 struct i40evf_vlan_filter *f;
686
687 f = i40evf_find_vlan(adapter, vlan);
688 if (f) {
689 f->remove = true;
690 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
691 }
5eae00c5
GR		 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) {
5eae00c5
GR		 770 clear_bit(__I40EVF_IN_CRITICAL_TASK,
771 &adapter->crit_section);
772 return NULL;
773 }
774
775 memcpy(f->macaddr, macaddr, ETH_ALEN);
776
777 list_add(&f->list, &adapter->mac_filter_list);
778 f->add = true;
779 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
780 }
781
782 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
783 return f;
784}
785
786/**
787 * i40evf_set_mac - NDO callback to set port mac address
788 * @netdev: network interface device structure
789 * @p: pointer to an address structure
790 *
791 * Returns 0 on success, negative on failure
792 **/
793static int i40evf_set_mac(struct net_device *netdev, void *p)
794{
795 struct i40evf_adapter *adapter = netdev_priv(netdev);
796 struct i40e_hw *hw = &adapter->hw;
797 struct i40evf_mac_filter *f;
798 struct sockaddr *addr = p;
799
800 if (!is_valid_ether_addr(addr->sa_data))
801 return -EADDRNOTAVAIL;
802
803 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
804 return 0;
805
806 f = i40evf_add_filter(adapter, addr->sa_data);
807 if (f) {
808 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
809 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
810 netdev->addr_len);
811 }
812
813 return (f == NULL) ? -ENOMEM : 0;
814}
815
816/**
817 * i40evf_set_rx_mode - NDO callback to set the netdev filters
818 * @netdev: network interface device structure
819 **/
820static void i40evf_set_rx_mode(struct net_device *netdev)
821{
822 struct i40evf_adapter *adapter = netdev_priv(netdev);
823 struct i40evf_mac_filter *f, *ftmp;
824 struct netdev_hw_addr *uca;
825 struct netdev_hw_addr *mca;
826
827 /* add addr if not already in the filter list */
828 netdev_for_each_uc_addr(uca, netdev) {
829 i40evf_add_filter(adapter, uca->addr);
830 }
831 netdev_for_each_mc_addr(mca, netdev) {
832 i40evf_add_filter(adapter, mca->addr);
833 }
834
835 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
836 &adapter->crit_section))
837 mdelay(1);
838 /* remove filter if not in netdev list */
839 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
840 bool found = false;
841
dc5f2de6 842 if (is_multicast_ether_addr(f->macaddr)) {
5eae00c5
GR		 843 netdev_for_each_mc_addr(mca, netdev) {
844 if (ether_addr_equal(mca->addr, f->macaddr)) {
845 found = true;
846 break;
847 }
848 }
849 } else {
850 netdev_for_each_uc_addr(uca, netdev) {
851 if (ether_addr_equal(uca->addr, f->macaddr)) {
852 found = true;
853 break;
854 }
855 }
856 }
857 if (found) {
858 f->remove = true;
859 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
860 }
861 }
862 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
863}
864
865/**
866 * i40evf_napi_enable_all - enable NAPI on all queue vectors
867 * @adapter: board private structure
868 **/
869static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
870{
871 int q_idx;
872 struct i40e_q_vector *q_vector;
873 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
874
875 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
876 struct napi_struct *napi;
877 q_vector = adapter->q_vector[q_idx];
878 napi = &q_vector->napi;
879 napi_enable(napi);
880 }
881}
882
883/**
884 * i40evf_napi_disable_all - disable NAPI on all queue vectors
885 * @adapter: board private structure
886 **/
887static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
888{
889 int q_idx;
890 struct i40e_q_vector *q_vector;
891 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
892
893 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
894 q_vector = adapter->q_vector[q_idx];
895 napi_disable(&q_vector->napi);
896 }
897}
898
899/**
900 * i40evf_configure - set up transmit and receive data structures
901 * @adapter: board private structure
902 **/
903static void i40evf_configure(struct i40evf_adapter *adapter)
904{
905 struct net_device *netdev = adapter->netdev;
906 int i;
907
908 i40evf_set_rx_mode(netdev);
909
910 i40evf_configure_tx(adapter);
911 i40evf_configure_rx(adapter);
912 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
913
914 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
915 struct i40e_ring *ring = adapter->rx_rings[i];
916 i40evf_alloc_rx_buffers(ring, ring->count);
917 ring->next_to_use = ring->count - 1;
918 writel(ring->next_to_use, ring->tail);
919 }
920}
921
922/**
923 * i40evf_up_complete - Finish the last steps of bringing up a connection
924 * @adapter: board private structure
925 **/
926static int i40evf_up_complete(struct i40evf_adapter *adapter)
927{
928 adapter->state = __I40EVF_RUNNING;
929 clear_bit(__I40E_DOWN, &adapter->vsi.state);
930
931 i40evf_napi_enable_all(adapter);
932
933 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
934 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
935 return 0;
936}
937
938/**
939 * i40evf_clean_all_rx_rings - Free Rx Buffers for all queues
940 * @adapter: board private structure
941 **/
942static void i40evf_clean_all_rx_rings(struct i40evf_adapter *adapter)
943{
944 int i;
945
946 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
947 i40evf_clean_rx_ring(adapter->rx_rings[i]);
948}
949
950/**
951 * i40evf_clean_all_tx_rings - Free Tx Buffers for all queues
952 * @adapter: board private structure
953 **/
954static void i40evf_clean_all_tx_rings(struct i40evf_adapter *adapter)
955{
956 int i;
957
958 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
959 i40evf_clean_tx_ring(adapter->tx_rings[i]);
960}
961
962/**
963 * i40e_down - Shutdown the connection processing
964 * @adapter: board private structure
965 **/
966void i40evf_down(struct i40evf_adapter *adapter)
967{
968 struct net_device *netdev = adapter->netdev;
969 struct i40evf_mac_filter *f;
970
ef8693eb 971 /* remove all MAC filters */
5eae00c5
GR		 972 list_for_each_entry(f, &adapter->mac_filter_list, list) {
973 f->remove = true;
974 }
ed1f5b58
MW		 975 /* remove all VLAN filters */
976 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
977 f->remove = true;
978 }
ef8693eb
MW		 979 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
980 adapter->state != __I40EVF_RESETTING) {
981 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
ed1f5b58 982 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
ef8693eb
MW		 983 /* disable receives */
984 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
985 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
986 msleep(20);
987 }
5eae00c5
GR		 988 netif_tx_disable(netdev);
989
990 netif_tx_stop_all_queues(netdev);
991
992 i40evf_irq_disable(adapter);
993
994 i40evf_napi_disable_all(adapter);
995
996 netif_carrier_off(netdev);
997
998 i40evf_clean_all_tx_rings(adapter);
999 i40evf_clean_all_rx_rings(adapter);
1000}
1001
1002/**
1003 * i40evf_acquire_msix_vectors - Setup the MSIX capability
1004 * @adapter: board private structure
1005 * @vectors: number of vectors to request
1006 *
1007 * Work with the OS to set up the MSIX vectors needed.
1008 *
1009 * Returns 0 on success, negative on failure
1010 **/
1011static int
1012i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1013{
1014 int err, vector_threshold;
1015
1016 /* We'll want at least 3 (vector_threshold):
1017 * 0) Other (Admin Queue and link, mostly)
1018 * 1) TxQ[0] Cleanup
1019 * 2) RxQ[0] Cleanup
1020 */
1021 vector_threshold = MIN_MSIX_COUNT;
1022
1023 /* The more we get, the more we will assign to Tx/Rx Cleanup
1024 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1025 * Right now, we simply care about how many we'll get; we'll
1026 * set them up later while requesting irq's.
1027 */
fc2f2f5d
AG		 1028 err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1029 vector_threshold, vectors);
1030 if (err < 0) {
80e72893 1031 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
5eae00c5
GR		 1032 kfree(adapter->msix_entries);
1033 adapter->msix_entries = NULL;
fc2f2f5d 1034 return err;
5eae00c5 1035 }
fc2f2f5d
AG		 1036
1037 /* Adjust for only the vectors we'll use, which is minimum
1038 * of max_msix_q_vectors + NONQ_VECS, or the number of
1039 * vectors we were allocated.
1040 */
1041 adapter->num_msix_vectors = err;
1042 return 0;
5eae00c5
GR		 1043}
1044
1045/**
1046 * i40evf_free_queues - Free memory for all rings
1047 * @adapter: board private structure to initialize
1048 *
1049 * Free all of the memory associated with queue pairs.
1050 **/
1051static void i40evf_free_queues(struct i40evf_adapter *adapter)
1052{
1053 int i;
1054
1055 if (!adapter->vsi_res)
1056 return;
1057 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1058 if (adapter->tx_rings[i])
1059 kfree_rcu(adapter->tx_rings[i], rcu);
1060 adapter->tx_rings[i] = NULL;
1061 adapter->rx_rings[i] = NULL;
1062 }
1063}
1064
1065/**
1066 * i40evf_alloc_queues - Allocate memory for all rings
1067 * @adapter: board private structure to initialize
1068 *
1069 * We allocate one ring per queue at run-time since we don't know the
1070 * number of queues at compile-time. The polling_netdev array is
1071 * intended for Multiqueue, but should work fine with a single queue.
1072 **/
1073static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1074{
1075 int i;
1076
1077 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1078 struct i40e_ring *tx_ring;
1079 struct i40e_ring *rx_ring;
1080
1081 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
1082 if (!tx_ring)
1083 goto err_out;
1084
1085 tx_ring->queue_index = i;
1086 tx_ring->netdev = adapter->netdev;
1087 tx_ring->dev = &adapter->pdev->dev;
d732a184 1088 tx_ring->count = adapter->tx_desc_count;
5eae00c5
GR		 1089 adapter->tx_rings[i] = tx_ring;
1090
1091 rx_ring = &tx_ring[1];
1092 rx_ring->queue_index = i;
1093 rx_ring->netdev = adapter->netdev;
1094 rx_ring->dev = &adapter->pdev->dev;
d732a184 1095 rx_ring->count = adapter->rx_desc_count;
5eae00c5
GR		 1096 adapter->rx_rings[i] = rx_ring;
1097 }
1098
1099 return 0;
1100
1101err_out:
1102 i40evf_free_queues(adapter);
1103 return -ENOMEM;
1104}
1105
1106/**
1107 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1108 * @adapter: board private structure to initialize
1109 *
1110 * Attempt to configure the interrupts using the best available
1111 * capabilities of the hardware and the kernel.
1112 **/
1113static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1114{
1115 int vector, v_budget;
1116 int pairs = 0;
1117 int err = 0;
1118
1119 if (!adapter->vsi_res) {
1120 err = -EIO;
1121 goto out;
1122 }
1123 pairs = adapter->vsi_res->num_queue_pairs;
1124
1125 /* It's easy to be greedy for MSI-X vectors, but it really
1126 * doesn't do us much good if we have a lot more vectors
1127 * than CPU's. So let's be conservative and only ask for
1128 * (roughly) twice the number of vectors as there are CPU's.
1129 */
30a500e2
MW		 1130 v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1131 v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
5eae00c5 1132
5eae00c5
GR		 1133 adapter->msix_entries = kcalloc(v_budget,
1134 sizeof(struct msix_entry), GFP_KERNEL);
1135 if (!adapter->msix_entries) {
1136 err = -ENOMEM;
1137 goto out;
1138 }
1139
1140 for (vector = 0; vector < v_budget; vector++)
1141 adapter->msix_entries[vector].entry = vector;
1142
1143 i40evf_acquire_msix_vectors(adapter, v_budget);
1144
1145out:
1146 adapter->netdev->real_num_tx_queues = pairs;
1147 return err;
1148}
1149
1150/**
1151 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1152 * @adapter: board private structure to initialize
1153 *
1154 * We allocate one q_vector per queue interrupt. If allocation fails we
1155 * return -ENOMEM.
1156 **/
1157static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1158{
1159 int q_idx, num_q_vectors;
1160 struct i40e_q_vector *q_vector;
1161
1162 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1163
1164 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1165 q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
1166 if (!q_vector)
1167 goto err_out;
1168 q_vector->adapter = adapter;
1169 q_vector->vsi = &adapter->vsi;
1170 q_vector->v_idx = q_idx;
1171 netif_napi_add(adapter->netdev, &q_vector->napi,
1172 i40evf_napi_poll, 64);
1173 adapter->q_vector[q_idx] = q_vector;
1174 }
1175
1176 return 0;
1177
1178err_out:
1179 while (q_idx) {
1180 q_idx--;
1181 q_vector = adapter->q_vector[q_idx];
1182 netif_napi_del(&q_vector->napi);
1183 kfree(q_vector);
1184 adapter->q_vector[q_idx] = NULL;
1185 }
1186 return -ENOMEM;
1187}
1188
1189/**
1190 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1191 * @adapter: board private structure to initialize
1192 *
1193 * This function frees the memory allocated to the q_vectors. In addition if
1194 * NAPI is enabled it will delete any references to the NAPI struct prior
1195 * to freeing the q_vector.
1196 **/
1197static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1198{
1199 int q_idx, num_q_vectors;
1200 int napi_vectors;
1201
1202 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1203 napi_vectors = adapter->vsi_res->num_queue_pairs;
1204
1205 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1206 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1207
1208 adapter->q_vector[q_idx] = NULL;
1209 if (q_idx < napi_vectors)
1210 netif_napi_del(&q_vector->napi);
1211 kfree(q_vector);
1212 }
1213}
1214
1215/**
1216 * i40evf_reset_interrupt_capability - Reset MSIX setup
1217 * @adapter: board private structure
1218 *
1219 **/
1220void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1221{
1222 pci_disable_msix(adapter->pdev);
1223 kfree(adapter->msix_entries);
1224 adapter->msix_entries = NULL;
5eae00c5
GR		 1225}
1226
1227/**
1228 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1229 * @adapter: board private structure to initialize
1230 *
1231 **/
1232int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1233{
1234 int err;
1235
1236 err = i40evf_set_interrupt_capability(adapter);
1237 if (err) {
1238 dev_err(&adapter->pdev->dev,
1239 "Unable to setup interrupt capabilities\n");
1240 goto err_set_interrupt;
1241 }
1242
1243 err = i40evf_alloc_q_vectors(adapter);
1244 if (err) {
1245 dev_err(&adapter->pdev->dev,
1246 "Unable to allocate memory for queue vectors\n");
1247 goto err_alloc_q_vectors;
1248 }
1249
1250 err = i40evf_alloc_queues(adapter);
1251 if (err) {
1252 dev_err(&adapter->pdev->dev,
1253 "Unable to allocate memory for queues\n");
1254 goto err_alloc_queues;
1255 }
1256
1257 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1258 (adapter->vsi_res->num_queue_pairs > 1) ? "Enabled" :
1259 "Disabled", adapter->vsi_res->num_queue_pairs);
1260
1261 return 0;
1262err_alloc_queues:
1263 i40evf_free_q_vectors(adapter);
1264err_alloc_q_vectors:
1265 i40evf_reset_interrupt_capability(adapter);
1266err_set_interrupt:
1267 return err;
1268}
1269
1270/**
1271 * i40evf_watchdog_timer - Periodic call-back timer
1272 * @data: pointer to adapter disguised as unsigned long
1273 **/
1274static void i40evf_watchdog_timer(unsigned long data)
1275{
1276 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1277 schedule_work(&adapter->watchdog_task);
1278 /* timer will be rescheduled in watchdog task */
1279}
1280
1281/**
1282 * i40evf_watchdog_task - Periodic call-back task
1283 * @work: pointer to work_struct
1284 **/
1285static void i40evf_watchdog_task(struct work_struct *work)
1286{
1287 struct i40evf_adapter *adapter = container_of(work,
1288 struct i40evf_adapter,
1289 watchdog_task);
1290 struct i40e_hw *hw = &adapter->hw;
1291
ef8693eb
MW		 1292 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1293 goto restart_watchdog;
1294
1295 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
ef8693eb
MW		 1296 if ((rd32(hw, I40E_VFGEN_RSTAT) & 0x3) == I40E_VFR_VFACTIVE) {
1297 /* A chance for redemption! */
1298 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1299 adapter->state = __I40EVF_STARTUP;
1300 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1301 schedule_delayed_work(&adapter->init_task, 10);
1302 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1303 &adapter->crit_section);
1304 /* Don't reschedule the watchdog, since we've restarted
1305 * the init task. When init_task contacts the PF and
1306 * gets everything set up again, it'll restart the
1307 * watchdog for us. Down, boy. Sit. Stay. Woof.
1308 */
1309 return;
1310 }
1311 adapter->aq_pending = 0;
1312 adapter->aq_required = 0;
1313 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5 1314 goto watchdog_done;
ef8693eb 1315 }
5eae00c5 1316
ef8693eb
MW		 1317 if ((adapter->state < __I40EVF_DOWN) ||
1318 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
5eae00c5
GR		 1319 goto watchdog_done;
1320
ef8693eb
MW		 1321 /* check for reset */
1322 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
5eae00c5
GR		 1323 (rd32(hw, I40E_VFGEN_RSTAT) & 0x3) != I40E_VFR_VFACTIVE) {
1324 adapter->state = __I40EVF_RESETTING;
ef8693eb 1325 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
249c8b8d 1326 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
5eae00c5 1327 schedule_work(&adapter->reset_task);
ef8693eb
MW		 1328 adapter->aq_pending = 0;
1329 adapter->aq_required = 0;
1330 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
5eae00c5
GR		 1331 goto watchdog_done;
1332 }
1333
1334 /* Process admin queue tasks. After init, everything gets done
1335 * here so we don't race on the admin queue.
1336 */
1337 if (adapter->aq_pending)
1338 goto watchdog_done;
1339
1340 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1341 i40evf_map_queues(adapter);
1342 goto watchdog_done;
1343 }
1344
1345 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1346 i40evf_add_ether_addrs(adapter);
1347 goto watchdog_done;
1348 }
1349
1350 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1351 i40evf_add_vlans(adapter);
1352 goto watchdog_done;
1353 }
1354
1355 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1356 i40evf_del_ether_addrs(adapter);
1357 goto watchdog_done;
1358 }
1359
1360 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1361 i40evf_del_vlans(adapter);
1362 goto watchdog_done;
1363 }
1364
1365 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1366 i40evf_disable_queues(adapter);
1367 goto watchdog_done;
1368 }
1369
1370 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1371 i40evf_configure_queues(adapter);
1372 goto watchdog_done;
1373 }
1374
1375 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1376 i40evf_enable_queues(adapter);
1377 goto watchdog_done;
1378 }
1379
1380 if (adapter->state == __I40EVF_RUNNING)
1381 i40evf_request_stats(adapter);
1382
1383 i40evf_irq_enable(adapter, true);
1384 i40evf_fire_sw_int(adapter, 0xFF);
ef8693eb 1385
5eae00c5 1386watchdog_done:
ef8693eb
MW		 1387 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1388restart_watchdog:
5eae00c5
GR		 1389 if (adapter->aq_required)
1390 mod_timer(&adapter->watchdog_timer,
1391 jiffies + msecs_to_jiffies(20));
1392 else
1393 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
5eae00c5
GR		 1394 schedule_work(&adapter->adminq_task);
1395}
1396
5b7af02c
MW		 1397/**
1398 * i40evf_configure_rss - increment to next available tx queue
1399 * @adapter: board private structure
1400 * @j: queue counter
1401 *
1402 * Helper function for RSS programming to increment through available
1403 * queus. Returns the next queue value.
1404 **/
96d47704
MW		 1405static int next_queue(struct i40evf_adapter *adapter, int j)
1406{
1407 j += 1;
1408
1409 return j >= adapter->vsi_res->num_queue_pairs ? 0 : j;
1410}
1411
5eae00c5
GR		 1412/**
1413 * i40evf_configure_rss - Prepare for RSS if used
1414 * @adapter: board private structure
1415 **/
1416static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1417{
1418 struct i40e_hw *hw = &adapter->hw;
1419 u32 lut = 0;
1420 int i, j;
1421 u64 hena;
1422
1423 /* Set of random keys generated using kernel random number generator */
1424 static const u32 seed[I40E_VFQF_HKEY_MAX_INDEX + 1] = {
1425 0x794221b4, 0xbca0c5ab, 0x6cd5ebd9, 0x1ada6127,
1426 0x983b3aa1, 0x1c4e71eb, 0x7f6328b2, 0xfcdc0da0,
1427 0xc135cafa, 0x7a6f7e2d, 0xe7102d28, 0x163cd12e,
1428 0x4954b126 };
1429
1430 /* Hash type is configured by the PF - we just supply the key */
1431
1432 /* Fill out hash function seed */
1433 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1434 wr32(hw, I40E_VFQF_HKEY(i), seed[i]);
1435
1436 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1437 hena = I40E_DEFAULT_RSS_HENA;
1438 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1439 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1440
1441 /* Populate the LUT with max no. of queues in round robin fashion */
96d47704
MW		 1442 j = adapter->vsi_res->num_queue_pairs;
1443 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
5b7af02c
MW		 1444 j = next_queue(adapter, j);
1445 lut = j;
1446 j = next_queue(adapter, j);
1447 lut |= j << 8;
1448 j = next_queue(adapter, j);
1449 lut |= j << 16;
1450 j = next_queue(adapter, j);
1451 lut |= j << 24;
96d47704 1452 wr32(hw, I40E_VFQF_HLUT(i), lut);
5eae00c5
GR		 1453 }
1454 i40e_flush(hw);
1455}
1456
ef8693eb
MW		 1457#define I40EVF_RESET_WAIT_MS 100
1458#define I40EVF_RESET_WAIT_COUNT 200
5eae00c5
GR		 1459/**
1460 * i40evf_reset_task - Call-back task to handle hardware reset
1461 * @work: pointer to work_struct
1462 *
1463 * During reset we need to shut down and reinitialize the admin queue
1464 * before we can use it to communicate with the PF again. We also clear
1465 * and reinit the rings because that context is lost as well.
1466 **/
1467static void i40evf_reset_task(struct work_struct *work)
1468{
ef8693eb
MW		 1469 struct i40evf_adapter *adapter = container_of(work,
1470 struct i40evf_adapter,
1471 reset_task);
5eae00c5
GR		 1472 struct i40e_hw *hw = &adapter->hw;
1473 int i = 0, err;
1474 uint32_t rstat_val;
1475
1476 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1477 &adapter->crit_section))
1478 udelay(500);
3526d800
MW		 1479
1480 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1481 dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
1482 i40evf_request_reset(adapter);
1483 }
1484
ef8693eb
MW		 1485 /* poll until we see the reset actually happen */
1486 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1487 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1488 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1489 if (rstat_val != I40E_VFR_VFACTIVE) {
1490 dev_info(&adapter->pdev->dev, "Reset now occurring\n");
1491 break;
1492 } else {
1493 msleep(I40EVF_RESET_WAIT_MS);
1494 }
1495 }
1496 if (i == I40EVF_RESET_WAIT_COUNT) {
1497 dev_err(&adapter->pdev->dev, "Reset was not detected\n");
1498 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1499 goto continue_reset; /* act like the reset happened */
1500 }
5eae00c5 1501
ef8693eb
MW		 1502 /* wait until the reset is complete and the PF is responding to us */
1503 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
5eae00c5
GR		 1504 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1505 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
ef8693eb 1506 if (rstat_val == I40E_VFR_VFACTIVE) {
80e72893 1507 dev_info(&adapter->pdev->dev, "Reset complete, reinitializing\n");
5eae00c5 1508 break;
ef8693eb
MW		 1509 } else {
1510 msleep(I40EVF_RESET_WAIT_MS);
1511 }
5eae00c5 1512 }
ef8693eb 1513 if (i == I40EVF_RESET_WAIT_COUNT) {
5eae00c5 1514 /* reset never finished */
80e72893 1515 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
ef8693eb
MW		 1516 rstat_val);
1517 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1518
169f4076
MW		 1519 if (netif_running(adapter->netdev)) {
1520 set_bit(__I40E_DOWN, &adapter->vsi.state);
1521 i40evf_down(adapter);
1522 i40evf_free_traffic_irqs(adapter);
1523 i40evf_free_all_tx_resources(adapter);
1524 i40evf_free_all_rx_resources(adapter);
1525 }
ef8693eb
MW		 1526 i40evf_free_misc_irq(adapter);
1527 i40evf_reset_interrupt_capability(adapter);
1528 i40evf_free_queues(adapter);
1529 kfree(adapter->vf_res);
1530 i40evf_shutdown_adminq(hw);
1531 adapter->netdev->flags &= ~IFF_UP;
1532 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1533 return; /* Do not attempt to reinit. It's dead, Jim. */
5eae00c5 1534 }
ef8693eb
MW		 1535
1536continue_reset:
1537 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1538
5eae00c5
GR		 1539 i40evf_down(adapter);
1540 adapter->state = __I40EVF_RESETTING;
1541
1542 /* kill and reinit the admin queue */
1543 if (i40evf_shutdown_adminq(hw))
1544 dev_warn(&adapter->pdev->dev,
1545 "%s: Failed to destroy the Admin Queue resources\n",
1546 __func__);
1547 err = i40evf_init_adminq(hw);
1548 if (err)
1549 dev_info(&adapter->pdev->dev, "%s: init_adminq failed: %d\n",
1550 __func__, err);
1551
1552 adapter->aq_pending = 0;
1553 adapter->aq_required = 0;
1554 i40evf_map_queues(adapter);
1555 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1556
1557 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1558
1559 if (netif_running(adapter->netdev)) {
1560 /* allocate transmit descriptors */
1561 err = i40evf_setup_all_tx_resources(adapter);
1562 if (err)
1563 goto reset_err;
1564
1565 /* allocate receive descriptors */
1566 err = i40evf_setup_all_rx_resources(adapter);
1567 if (err)
1568 goto reset_err;
1569
1570 i40evf_configure(adapter);
1571
1572 err = i40evf_up_complete(adapter);
1573 if (err)
1574 goto reset_err;
1575
1576 i40evf_irq_enable(adapter, true);
1577 }
1578 return;
1579reset_err:
80e72893 1580 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
5eae00c5
GR		 1581 i40evf_close(adapter->netdev);
1582}
1583
1584/**
1585 * i40evf_adminq_task - worker thread to clean the admin queue
1586 * @work: pointer to work_struct containing our data
1587 **/
1588static void i40evf_adminq_task(struct work_struct *work)
1589{
1590 struct i40evf_adapter *adapter =
1591 container_of(work, struct i40evf_adapter, adminq_task);
1592 struct i40e_hw *hw = &adapter->hw;
1593 struct i40e_arq_event_info event;
1594 struct i40e_virtchnl_msg *v_msg;
1595 i40e_status ret;
1596 u16 pending;
1597
ef8693eb
MW		 1598 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1599 return;
1600
5eae00c5
GR		 1601 event.msg_size = I40EVF_MAX_AQ_BUF_SIZE;
1602 event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
249c8b8d 1603 if (!event.msg_buf)
5eae00c5 1604 return;
249c8b8d 1605
5eae00c5
GR		 1606 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1607 do {
1608 ret = i40evf_clean_arq_element(hw, &event, &pending);
1609 if (ret)
1610 break; /* No event to process or error cleaning ARQ */
1611
1612 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1613 v_msg->v_retval, event.msg_buf,
1614 event.msg_size);
1615 if (pending != 0) {
1616 dev_info(&adapter->pdev->dev,
1617 "%s: ARQ: Pending events %d\n",
1618 __func__, pending);
1619 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1620 }
1621 } while (pending);
1622
1623 /* re-enable Admin queue interrupt cause */
1624 i40evf_misc_irq_enable(adapter);
1625
1626 kfree(event.msg_buf);
1627}
1628
1629/**
1630 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1631 * @adapter: board private structure
1632 *
1633 * Free all transmit software resources
1634 **/
1635static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1636{
1637 int i;
1638
1639 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1640 if (adapter->tx_rings[i]->desc)
1641 i40evf_free_tx_resources(adapter->tx_rings[i]);
1642
1643}
1644
1645/**
1646 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1647 * @adapter: board private structure
1648 *
1649 * If this function returns with an error, then it's possible one or
1650 * more of the rings is populated (while the rest are not). It is the
1651 * callers duty to clean those orphaned rings.
1652 *
1653 * Return 0 on success, negative on failure
1654 **/
1655static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1656{
1657 int i, err = 0;
1658
1659 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
d732a184 1660 adapter->tx_rings[i]->count = adapter->tx_desc_count;
5eae00c5
GR		 1661 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1662 if (!err)
1663 continue;
1664 dev_err(&adapter->pdev->dev,
1665 "%s: Allocation for Tx Queue %u failed\n",
1666 __func__, i);
1667 break;
1668 }
1669
1670 return err;
1671}
1672
1673/**
1674 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1675 * @adapter: board private structure
1676 *
1677 * If this function returns with an error, then it's possible one or
1678 * more of the rings is populated (while the rest are not). It is the
1679 * callers duty to clean those orphaned rings.
1680 *
1681 * Return 0 on success, negative on failure
1682 **/
1683static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1684{
1685 int i, err = 0;
1686
1687 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
d732a184 1688 adapter->rx_rings[i]->count = adapter->rx_desc_count;
5eae00c5
GR		 1689 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1690 if (!err)
1691 continue;
1692 dev_err(&adapter->pdev->dev,
1693 "%s: Allocation for Rx Queue %u failed\n",
1694 __func__, i);
1695 break;
1696 }
1697 return err;
1698}
1699
1700/**
1701 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1702 * @adapter: board private structure
1703 *
1704 * Free all receive software resources
1705 **/
1706static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1707{
1708 int i;
1709
1710 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1711 if (adapter->rx_rings[i]->desc)
1712 i40evf_free_rx_resources(adapter->rx_rings[i]);
1713}
1714
1715/**
1716 * i40evf_open - Called when a network interface is made active
1717 * @netdev: network interface device structure
1718 *
1719 * Returns 0 on success, negative value on failure
1720 *
1721 * The open entry point is called when a network interface is made
1722 * active by the system (IFF_UP). At this point all resources needed
1723 * for transmit and receive operations are allocated, the interrupt
1724 * handler is registered with the OS, the watchdog timer is started,
1725 * and the stack is notified that the interface is ready.
1726 **/
1727static int i40evf_open(struct net_device *netdev)
1728{
1729 struct i40evf_adapter *adapter = netdev_priv(netdev);
1730 int err;
1731
ef8693eb
MW		 1732 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1733 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1734 return -EIO;
1735 }
5eae00c5
GR		 1736 if (adapter->state != __I40EVF_DOWN)
1737 return -EBUSY;
1738
1739 /* allocate transmit descriptors */
1740 err = i40evf_setup_all_tx_resources(adapter);
1741 if (err)
1742 goto err_setup_tx;
1743
1744 /* allocate receive descriptors */
1745 err = i40evf_setup_all_rx_resources(adapter);
1746 if (err)
1747 goto err_setup_rx;
1748
1749 /* clear any pending interrupts, may auto mask */
1750 err = i40evf_request_traffic_irqs(adapter, netdev->name);
1751 if (err)
1752 goto err_req_irq;
1753
1754 i40evf_configure(adapter);
1755
1756 err = i40evf_up_complete(adapter);
1757 if (err)
1758 goto err_req_irq;
1759
1760 i40evf_irq_enable(adapter, true);
1761
1762 return 0;
1763
1764err_req_irq:
1765 i40evf_down(adapter);
1766 i40evf_free_traffic_irqs(adapter);
1767err_setup_rx:
1768 i40evf_free_all_rx_resources(adapter);
1769err_setup_tx:
1770 i40evf_free_all_tx_resources(adapter);
1771
1772 return err;
1773}
1774
1775/**
1776 * i40evf_close - Disables a network interface
1777 * @netdev: network interface device structure
1778 *
1779 * Returns 0, this is not allowed to fail
1780 *
1781 * The close entry point is called when an interface is de-activated
1782 * by the OS. The hardware is still under the drivers control, but
1783 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1784 * are freed, along with all transmit and receive resources.
1785 **/
1786static int i40evf_close(struct net_device *netdev)
1787{
1788 struct i40evf_adapter *adapter = netdev_priv(netdev);
1789
ef8693eb
MW		 1790 if (adapter->state <= __I40EVF_DOWN)
1791 return 0;
1792
5eae00c5
GR		 1793 /* signal that we are down to the interrupt handler */
1794 adapter->state = __I40EVF_DOWN;
ef8693eb 1795
5eae00c5
GR		 1796 set_bit(__I40E_DOWN, &adapter->vsi.state);
1797
1798 i40evf_down(adapter);
1799 i40evf_free_traffic_irqs(adapter);
1800
1801 i40evf_free_all_tx_resources(adapter);
1802 i40evf_free_all_rx_resources(adapter);
1803
1804 return 0;
1805}
1806
1807/**
1808 * i40evf_get_stats - Get System Network Statistics
1809 * @netdev: network interface device structure
1810 *
1811 * Returns the address of the device statistics structure.
1812 * The statistics are actually updated from the timer callback.
1813 **/
1814static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1815{
1816 struct i40evf_adapter *adapter = netdev_priv(netdev);
1817
1818 /* only return the current stats */
1819 return &adapter->net_stats;
1820}
1821
1822/**
1823 * i40evf_reinit_locked - Software reinit
1824 * @adapter: board private structure
1825 *
1826 * Reinititalizes the ring structures in response to a software configuration
1827 * change. Roughly the same as close followed by open, but skips releasing
1828 * and reallocating the interrupts.
1829 **/
1830void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1831{
1832 struct net_device *netdev = adapter->netdev;
1833 int err;
1834
1835 WARN_ON(in_interrupt());
1836
5eae00c5
GR		 1837 i40evf_down(adapter);
1838
1839 /* allocate transmit descriptors */
1840 err = i40evf_setup_all_tx_resources(adapter);
1841 if (err)
1842 goto err_reinit;
1843
1844 /* allocate receive descriptors */
1845 err = i40evf_setup_all_rx_resources(adapter);
1846 if (err)
1847 goto err_reinit;
1848
1849 i40evf_configure(adapter);
1850
1851 err = i40evf_up_complete(adapter);
1852 if (err)
1853 goto err_reinit;
1854
1855 i40evf_irq_enable(adapter, true);
1856 return;
1857
1858err_reinit:
80e72893 1859 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
5eae00c5
GR		 1860 i40evf_close(netdev);
1861}
1862
1863/**
1864 * i40evf_change_mtu - Change the Maximum Transfer Unit
1865 * @netdev: network interface device structure
1866 * @new_mtu: new value for maximum frame size
1867 *
1868 * Returns 0 on success, negative on failure
1869 **/
1870static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1871{
1872 struct i40evf_adapter *adapter = netdev_priv(netdev);
1873 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1874
1875 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1876 return -EINVAL;
1877
1878 /* must set new MTU before calling down or up */
1879 netdev->mtu = new_mtu;
1880 i40evf_reinit_locked(adapter);
1881 return 0;
1882}
1883
1884static const struct net_device_ops i40evf_netdev_ops = {
1885 .ndo_open = i40evf_open,
1886 .ndo_stop = i40evf_close,
1887 .ndo_start_xmit = i40evf_xmit_frame,
1888 .ndo_get_stats = i40evf_get_stats,
1889 .ndo_set_rx_mode = i40evf_set_rx_mode,
1890 .ndo_validate_addr = eth_validate_addr,
1891 .ndo_set_mac_address = i40evf_set_mac,
1892 .ndo_change_mtu = i40evf_change_mtu,
1893 .ndo_tx_timeout = i40evf_tx_timeout,
1894 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
1895 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
1896};
1897
1898/**
1899 * i40evf_check_reset_complete - check that VF reset is complete
1900 * @hw: pointer to hw struct
1901 *
1902 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1903 **/
1904static int i40evf_check_reset_complete(struct i40e_hw *hw)
1905{
1906 u32 rstat;
1907 int i;
1908
1909 for (i = 0; i < 100; i++) {
1910 rstat = rd32(hw, I40E_VFGEN_RSTAT);
1911 if (rstat == I40E_VFR_VFACTIVE)
1912 return 0;
1913 udelay(10);
1914 }
1915 return -EBUSY;
1916}
1917
1918/**
1919 * i40evf_init_task - worker thread to perform delayed initialization
1920 * @work: pointer to work_struct containing our data
1921 *
1922 * This task completes the work that was begun in probe. Due to the nature
1923 * of VF-PF communications, we may need to wait tens of milliseconds to get
1924 * reponses back from the PF. Rather than busy-wait in probe and bog down the
1925 * whole system, we'll do it in a task so we can sleep.
1926 * This task only runs during driver init. Once we've established
1927 * communications with the PF driver and set up our netdev, the watchdog
1928 * takes over.
1929 **/
1930static void i40evf_init_task(struct work_struct *work)
1931{
1932 struct i40evf_adapter *adapter = container_of(work,
1933 struct i40evf_adapter,
1934 init_task.work);
1935 struct net_device *netdev = adapter->netdev;
1936 struct i40evf_mac_filter *f;
1937 struct i40e_hw *hw = &adapter->hw;
1938 struct pci_dev *pdev = adapter->pdev;
1939 int i, err, bufsz;
1940
1941 switch (adapter->state) {
1942 case __I40EVF_STARTUP:
1943 /* driver loaded, probe complete */
ef8693eb
MW		 1944 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1945 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
5eae00c5
GR		 1946 err = i40e_set_mac_type(hw);
1947 if (err) {
c2a137cb
MW		 1948 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
1949 err);
5eae00c5
GR		 1950 goto err;
1951 }
1952 err = i40evf_check_reset_complete(hw);
1953 if (err) {
0d9c7ea8 1954 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
c2a137cb 1955 err);
5eae00c5
GR		 1956 goto err;
1957 }
1958 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
1959 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
1960 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1961 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1962
1963 err = i40evf_init_adminq(hw);
1964 if (err) {
c2a137cb
MW		 1965 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
1966 err);
5eae00c5
GR		 1967 goto err;
1968 }
1969 err = i40evf_send_api_ver(adapter);
1970 if (err) {
10bdd67b 1971 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
5eae00c5
GR		 1972 i40evf_shutdown_adminq(hw);
1973 goto err;
1974 }
1975 adapter->state = __I40EVF_INIT_VERSION_CHECK;
1976 goto restart;
1977 break;
1978 case __I40EVF_INIT_VERSION_CHECK:
10bdd67b 1979 if (!i40evf_asq_done(hw)) {
80e72893 1980 dev_err(&pdev->dev, "Admin queue command never completed\n");
5eae00c5 1981 goto err;
10bdd67b 1982 }
5eae00c5
GR		 1983
1984 /* aq msg sent, awaiting reply */
1985 err = i40evf_verify_api_ver(adapter);
1986 if (err) {
0d9c7ea8 1987 dev_info(&pdev->dev, "Unable to verify API version (%d), retrying\n",
5eae00c5
GR		 1988 err);
1989 goto err;
1990 }
1991 err = i40evf_send_vf_config_msg(adapter);
1992 if (err) {
c2a137cb 1993 dev_err(&pdev->dev, "Unable send config request (%d)\n",
5eae00c5
GR		 1994 err);
1995 goto err;
1996 }
1997 adapter->state = __I40EVF_INIT_GET_RESOURCES;
1998 goto restart;
1999 break;
2000 case __I40EVF_INIT_GET_RESOURCES:
2001 /* aq msg sent, awaiting reply */
2002 if (!adapter->vf_res) {
2003 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2004 (I40E_MAX_VF_VSI *
2005 sizeof(struct i40e_virtchnl_vsi_resource));
2006 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
c2a137cb 2007 if (!adapter->vf_res)
5eae00c5 2008 goto err;
5eae00c5
GR		 2009 }
2010 err = i40evf_get_vf_config(adapter);
2011 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2012 goto restart;
2013 if (err) {
c2a137cb
MW		 2014 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2015 err);
5eae00c5
GR		 2016 goto err_alloc;
2017 }
2018 adapter->state = __I40EVF_INIT_SW;
2019 break;
2020 default:
2021 goto err_alloc;
2022 }
2023 /* got VF config message back from PF, now we can parse it */
2024 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2025 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2026 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2027 }
2028 if (!adapter->vsi_res) {
c2a137cb 2029 dev_err(&pdev->dev, "No LAN VSI found\n");
5eae00c5
GR		 2030 goto err_alloc;
2031 }
2032
2033 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2034
5eae00c5
GR		 2035 netdev->netdev_ops = &i40evf_netdev_ops;
2036 i40evf_set_ethtool_ops(netdev);
2037 netdev->watchdog_timeo = 5 * HZ;
dbbd8111
MW		 2038 netdev->features |= NETIF_F_HIGHDMA |
2039 NETIF_F_SG |
5eae00c5
GR		 2040 NETIF_F_IP_CSUM |
2041 NETIF_F_SCTP_CSUM |
2042 NETIF_F_IPV6_CSUM |
2043 NETIF_F_TSO |
2044 NETIF_F_TSO6 |
3415e8ce 2045 NETIF_F_RXCSUM |
5eae00c5
GR		 2046 NETIF_F_GRO;
2047
2048 if (adapter->vf_res->vf_offload_flags
2049 & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2050 netdev->vlan_features = netdev->features;
2051 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2052 NETIF_F_HW_VLAN_CTAG_RX |
2053 NETIF_F_HW_VLAN_CTAG_FILTER;
2054 }
2055
3415e8ce
GR		 2056 /* copy netdev features into list of user selectable features */
2057 netdev->hw_features |= netdev->features;
2058 netdev->hw_features &= ~NETIF_F_RXCSUM;
2059
5eae00c5 2060 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
c2a137cb
MW		 2061 dev_info(&pdev->dev, "Invalid MAC address %pMAC, using random\n",
2062 adapter->hw.mac.addr);
5eae00c5
GR		 2063 random_ether_addr(adapter->hw.mac.addr);
2064 }
2065 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
2066 memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
2067
2068 INIT_LIST_HEAD(&adapter->mac_filter_list);
2069 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2070 f = kzalloc(sizeof(*f), GFP_ATOMIC);
2071 if (NULL == f)
2072 goto err_sw_init;
2073
2074 memcpy(f->macaddr, adapter->hw.mac.addr, ETH_ALEN);
2075 f->add = true;
2076 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2077
2078 list_add(&f->list, &adapter->mac_filter_list);
2079
2080 init_timer(&adapter->watchdog_timer);
2081 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2082 adapter->watchdog_timer.data = (unsigned long)adapter;
2083 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2084
d732a184
MW		 2085 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2086 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
5eae00c5
GR		 2087 err = i40evf_init_interrupt_scheme(adapter);
2088 if (err)
2089 goto err_sw_init;
2090 i40evf_map_rings_to_vectors(adapter);
2091 i40evf_configure_rss(adapter);
2092 err = i40evf_request_misc_irq(adapter);
2093 if (err)
2094 goto err_sw_init;
2095
2096 netif_carrier_off(netdev);
2097
5eae00c5
GR		 2098 adapter->vsi.id = adapter->vsi_res->vsi_id;
2099 adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2100 adapter->vsi.back = adapter;
2101 adapter->vsi.base_vector = 1;
2102 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
ca99eb99
MW		 2103 adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2104 ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2105 adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2106 ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
5eae00c5
GR		 2107 adapter->vsi.netdev = adapter->netdev;
2108
ef8693eb
MW		 2109 if (!adapter->netdev_registered) {
2110 err = register_netdev(netdev);
2111 if (err)
2112 goto err_register;
2113 }
5eae00c5
GR		 2114
2115 adapter->netdev_registered = true;
2116
2117 netif_tx_stop_all_queues(netdev);
2118
2119 dev_info(&pdev->dev, "MAC address: %pMAC\n", adapter->hw.mac.addr);
2120 if (netdev->features & NETIF_F_GRO)
2121 dev_info(&pdev->dev, "GRO is enabled\n");
2122
2123 dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2124 adapter->state = __I40EVF_DOWN;
2125 set_bit(__I40E_DOWN, &adapter->vsi.state);
2126 i40evf_misc_irq_enable(adapter);
2127 return;
2128restart:
2129 schedule_delayed_work(&adapter->init_task,
2130 msecs_to_jiffies(50));
2131 return;
2132
2133err_register:
2134 i40evf_free_misc_irq(adapter);
2135err_sw_init:
2136 i40evf_reset_interrupt_capability(adapter);
5eae00c5
GR		 2137err_alloc:
2138 kfree(adapter->vf_res);
2139 adapter->vf_res = NULL;
2140err:
2141 /* Things went into the weeds, so try again later */
2142 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
80e72893 2143 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
ef8693eb 2144 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
5eae00c5
GR		 2145 return; /* do not reschedule */
2146 }
2147 schedule_delayed_work(&adapter->init_task, HZ * 3);
5eae00c5
GR		 2148}
2149
2150/**
2151 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2152 * @pdev: pci device structure
2153 **/
2154static void i40evf_shutdown(struct pci_dev *pdev)
2155{
2156 struct net_device *netdev = pci_get_drvdata(pdev);
2157
2158 netif_device_detach(netdev);
2159
2160 if (netif_running(netdev))
2161 i40evf_close(netdev);
2162
2163#ifdef CONFIG_PM
2164 pci_save_state(pdev);
2165
2166#endif
2167 pci_disable_device(pdev);
2168}
2169
2170/**
2171 * i40evf_probe - Device Initialization Routine
2172 * @pdev: PCI device information struct
2173 * @ent: entry in i40evf_pci_tbl
2174 *
2175 * Returns 0 on success, negative on failure
2176 *
2177 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2178 * The OS initialization, configuring of the adapter private structure,
2179 * and a hardware reset occur.
2180 **/
2181static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2182{
2183 struct net_device *netdev;
2184 struct i40evf_adapter *adapter = NULL;
2185 struct i40e_hw *hw = NULL;
dbbd8111 2186 int err;
5eae00c5
GR		 2187
2188 err = pci_enable_device(pdev);
2189 if (err)
2190 return err;
2191
6494294f 2192 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
6494294f 2193 if (err) {
e3e3bfdd
JS		 2194 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2195 if (err) {
2196 dev_err(&pdev->dev,
2197 "DMA configuration failed: 0x%x\n", err);
2198 goto err_dma;
2199 }
5eae00c5
GR		 2200 }
2201
2202 err = pci_request_regions(pdev, i40evf_driver_name);
2203 if (err) {
2204 dev_err(&pdev->dev,
2205 "pci_request_regions failed 0x%x\n", err);
2206 goto err_pci_reg;
2207 }
2208
2209 pci_enable_pcie_error_reporting(pdev);
2210
2211 pci_set_master(pdev);
2212
2213 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2214 MAX_TX_QUEUES);
2215 if (!netdev) {
2216 err = -ENOMEM;
2217 goto err_alloc_etherdev;
2218 }
2219
2220 SET_NETDEV_DEV(netdev, &pdev->dev);
2221
2222 pci_set_drvdata(pdev, netdev);
2223 adapter = netdev_priv(netdev);
5eae00c5
GR		 2224
2225 adapter->netdev = netdev;
2226 adapter->pdev = pdev;
2227
2228 hw = &adapter->hw;
2229 hw->back = adapter;
2230
2231 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2232 adapter->state = __I40EVF_STARTUP;
2233
2234 /* Call save state here because it relies on the adapter struct. */
2235 pci_save_state(pdev);
2236
2237 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2238 pci_resource_len(pdev, 0));
2239 if (!hw->hw_addr) {
2240 err = -EIO;
2241 goto err_ioremap;
2242 }
2243 hw->vendor_id = pdev->vendor;
2244 hw->device_id = pdev->device;
2245 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2246 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2247 hw->subsystem_device_id = pdev->subsystem_device;
2248 hw->bus.device = PCI_SLOT(pdev->devfn);
2249 hw->bus.func = PCI_FUNC(pdev->devfn);
2250
2251 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2252 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2253 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2254 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2255 schedule_delayed_work(&adapter->init_task, 10);
2256
2257 return 0;
2258
2259err_ioremap:
2260 free_netdev(netdev);
2261err_alloc_etherdev:
2262 pci_release_regions(pdev);
2263err_pci_reg:
2264err_dma:
2265 pci_disable_device(pdev);
2266 return err;
2267}
2268
2269#ifdef CONFIG_PM
2270/**
2271 * i40evf_suspend - Power management suspend routine
2272 * @pdev: PCI device information struct
2273 * @state: unused
2274 *
2275 * Called when the system (VM) is entering sleep/suspend.
2276 **/
2277static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2278{
2279 struct net_device *netdev = pci_get_drvdata(pdev);
2280 struct i40evf_adapter *adapter = netdev_priv(netdev);
2281 int retval = 0;
2282
2283 netif_device_detach(netdev);
2284
2285 if (netif_running(netdev)) {
2286 rtnl_lock();
2287 i40evf_down(adapter);
2288 rtnl_unlock();
2289 }
2290 i40evf_free_misc_irq(adapter);
2291 i40evf_reset_interrupt_capability(adapter);
2292
2293 retval = pci_save_state(pdev);
2294 if (retval)
2295 return retval;
2296
2297 pci_disable_device(pdev);
2298
2299 return 0;
2300}
2301
2302/**
2303 * i40evf_resume - Power managment resume routine
2304 * @pdev: PCI device information struct
2305 *
2306 * Called when the system (VM) is resumed from sleep/suspend.
2307 **/
2308static int i40evf_resume(struct pci_dev *pdev)
2309{
2310 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2311 struct net_device *netdev = adapter->netdev;
2312 u32 err;
2313
2314 pci_set_power_state(pdev, PCI_D0);
2315 pci_restore_state(pdev);
2316 /* pci_restore_state clears dev->state_saved so call
2317 * pci_save_state to restore it.
2318 */
2319 pci_save_state(pdev);
2320
2321 err = pci_enable_device_mem(pdev);
2322 if (err) {
2323 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2324 return err;
2325 }
2326 pci_set_master(pdev);
2327
2328 rtnl_lock();
2329 err = i40evf_set_interrupt_capability(adapter);
2330 if (err) {
2331 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2332 return err;
2333 }
2334 err = i40evf_request_misc_irq(adapter);
2335 rtnl_unlock();
2336 if (err) {
2337 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2338 return err;
2339 }
2340
2341 schedule_work(&adapter->reset_task);
2342
2343 netif_device_attach(netdev);
2344
2345 return err;
2346}
2347
2348#endif /* CONFIG_PM */
2349/**
2350 * i40evf_remove - Device Removal Routine
2351 * @pdev: PCI device information struct
2352 *
2353 * i40evf_remove is called by the PCI subsystem to alert the driver
2354 * that it should release a PCI device. The could be caused by a
2355 * Hot-Plug event, or because the driver is going to be removed from
2356 * memory.
2357 **/
2358static void i40evf_remove(struct pci_dev *pdev)
2359{
2360 struct net_device *netdev = pci_get_drvdata(pdev);
2361 struct i40evf_adapter *adapter = netdev_priv(netdev);
2362 struct i40e_hw *hw = &adapter->hw;
2363
2364 cancel_delayed_work_sync(&adapter->init_task);
ef8693eb 2365 cancel_work_sync(&adapter->reset_task);
5eae00c5
GR		 2366
2367 if (adapter->netdev_registered) {
2368 unregister_netdev(netdev);
2369 adapter->netdev_registered = false;
2370 }
2371 adapter->state = __I40EVF_REMOVE;
2372
dbb01c8a 2373 if (adapter->msix_entries) {
5eae00c5 2374 i40evf_misc_irq_disable(adapter);
5eae00c5 2375 i40evf_free_misc_irq(adapter);
5eae00c5
GR		 2376 i40evf_reset_interrupt_capability(adapter);
2377 }
2378
dbb01c8a
MW		 2379 del_timer_sync(&adapter->watchdog_timer);
2380 flush_scheduled_work();
2381
5eae00c5
GR		 2382 if (hw->aq.asq.count)
2383 i40evf_shutdown_adminq(hw);
2384
2385 iounmap(hw->hw_addr);
2386 pci_release_regions(pdev);
2387
2388 i40evf_free_queues(adapter);
2389 kfree(adapter->vf_res);
2390
2391 free_netdev(netdev);
2392
2393 pci_disable_pcie_error_reporting(pdev);
2394
2395 pci_disable_device(pdev);
2396}
2397
2398static struct pci_driver i40evf_driver = {
2399 .name = i40evf_driver_name,
2400 .id_table = i40evf_pci_tbl,
2401 .probe = i40evf_probe,
2402 .remove = i40evf_remove,
2403#ifdef CONFIG_PM
2404 .suspend = i40evf_suspend,
2405 .resume = i40evf_resume,
2406#endif
2407 .shutdown = i40evf_shutdown,
2408};
2409
2410/**
2411 * i40e_init_module - Driver Registration Routine
2412 *
2413 * i40e_init_module is the first routine called when the driver is
2414 * loaded. All it does is register with the PCI subsystem.
2415 **/
2416static int __init i40evf_init_module(void)
2417{
2418 int ret;
2419 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2420 i40evf_driver_version);
2421
2422 pr_info("%s\n", i40evf_copyright);
2423
2424 ret = pci_register_driver(&i40evf_driver);
2425 return ret;
2426}
2427
2428module_init(i40evf_init_module);
2429
2430/**
2431 * i40e_exit_module - Driver Exit Cleanup Routine
2432 *
2433 * i40e_exit_module is called just before the driver is removed
2434 * from memory.
2435 **/
2436static void __exit i40evf_exit_module(void)
2437{
2438 pci_unregister_driver(&i40evf_driver);
2439}
2440
2441module_exit(i40evf_exit_module);
2442
2443/* i40evf_main.c */
Linux kernel - Deliverables
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