1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2013 - 2018 Intel Corporation. */
3
4 #include <linux/net/intel/libie/rx.h>
5 #include <net/netdev_lock.h>
6
7 #include "iavf.h"
8 #include "iavf_ptp.h"
9 #include "iavf_prototype.h"
10 /* All iavf tracepoints are defined by the include below, which must
11 * be included exactly once across the whole kernel with
12 * CREATE_TRACE_POINTS defined
13 */
14 #define CREATE_TRACE_POINTS
15 #include "iavf_trace.h"
16
17 static int iavf_setup_all_tx_resources(struct iavf_adapter *adapter);
18 static int iavf_setup_all_rx_resources(struct iavf_adapter *adapter);
19 static int iavf_close(struct net_device *netdev);
20 static void iavf_init_get_resources(struct iavf_adapter *adapter);
21 static int iavf_check_reset_complete(struct iavf_hw *hw);
22
23 char iavf_driver_name[] = "iavf";
24 static const char iavf_driver_string[] =
25 "Intel(R) Ethernet Adaptive Virtual Function Network Driver";
26
27 static const char iavf_copyright[] =
28 "Copyright (c) 2013 - 2018 Intel Corporation.";
29
30 /* iavf_pci_tbl - PCI Device ID Table
31 *
32 * Wildcard entries (PCI_ANY_ID) should come last
33 * Last entry must be all 0s
34 *
35 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
36 * Class, Class Mask, private data (not used) }
37 */
38 static const struct pci_device_id iavf_pci_tbl[] = {
39 {PCI_VDEVICE(INTEL, IAVF_DEV_ID_VF), 0},
40 {PCI_VDEVICE(INTEL, IAVF_DEV_ID_VF_HV), 0},
41 {PCI_VDEVICE(INTEL, IAVF_DEV_ID_X722_VF), 0},
42 {PCI_VDEVICE(INTEL, IAVF_DEV_ID_ADAPTIVE_VF), 0},
43 /* required last entry */
44 {0, }
45 };
46
47 MODULE_DEVICE_TABLE(pci, iavf_pci_tbl);
48
49 MODULE_ALIAS("i40evf");
50 MODULE_DESCRIPTION("Intel(R) Ethernet Adaptive Virtual Function Network Driver");
51 MODULE_IMPORT_NS("LIBETH");
52 MODULE_IMPORT_NS("LIBIE");
53 MODULE_IMPORT_NS("LIBIE_ADMINQ");
54 MODULE_LICENSE("GPL v2");
55
56 static const struct net_device_ops iavf_netdev_ops;
57
iavf_status_to_errno(enum iavf_status status)58 int iavf_status_to_errno(enum iavf_status status)
59 {
60 switch (status) {
61 case IAVF_SUCCESS:
62 return 0;
63 case IAVF_ERR_PARAM:
64 case IAVF_ERR_MAC_TYPE:
65 case IAVF_ERR_INVALID_MAC_ADDR:
66 case IAVF_ERR_INVALID_LINK_SETTINGS:
67 case IAVF_ERR_INVALID_PD_ID:
68 case IAVF_ERR_INVALID_QP_ID:
69 case IAVF_ERR_INVALID_CQ_ID:
70 case IAVF_ERR_INVALID_CEQ_ID:
71 case IAVF_ERR_INVALID_AEQ_ID:
72 case IAVF_ERR_INVALID_SIZE:
73 case IAVF_ERR_INVALID_ARP_INDEX:
74 case IAVF_ERR_INVALID_FPM_FUNC_ID:
75 case IAVF_ERR_QP_INVALID_MSG_SIZE:
76 case IAVF_ERR_INVALID_FRAG_COUNT:
77 case IAVF_ERR_INVALID_ALIGNMENT:
78 case IAVF_ERR_INVALID_PUSH_PAGE_INDEX:
79 case IAVF_ERR_INVALID_IMM_DATA_SIZE:
80 case IAVF_ERR_INVALID_VF_ID:
81 case IAVF_ERR_INVALID_HMCFN_ID:
82 case IAVF_ERR_INVALID_PBLE_INDEX:
83 case IAVF_ERR_INVALID_SD_INDEX:
84 case IAVF_ERR_INVALID_PAGE_DESC_INDEX:
85 case IAVF_ERR_INVALID_SD_TYPE:
86 case IAVF_ERR_INVALID_HMC_OBJ_INDEX:
87 case IAVF_ERR_INVALID_HMC_OBJ_COUNT:
88 case IAVF_ERR_INVALID_SRQ_ARM_LIMIT:
89 return -EINVAL;
90 case IAVF_ERR_NVM:
91 case IAVF_ERR_NVM_CHECKSUM:
92 case IAVF_ERR_PHY:
93 case IAVF_ERR_CONFIG:
94 case IAVF_ERR_UNKNOWN_PHY:
95 case IAVF_ERR_LINK_SETUP:
96 case IAVF_ERR_ADAPTER_STOPPED:
97 case IAVF_ERR_PRIMARY_REQUESTS_PENDING:
98 case IAVF_ERR_AUTONEG_NOT_COMPLETE:
99 case IAVF_ERR_RESET_FAILED:
100 case IAVF_ERR_BAD_PTR:
101 case IAVF_ERR_SWFW_SYNC:
102 case IAVF_ERR_QP_TOOMANY_WRS_POSTED:
103 case IAVF_ERR_QUEUE_EMPTY:
104 case IAVF_ERR_FLUSHED_QUEUE:
105 case IAVF_ERR_OPCODE_MISMATCH:
106 case IAVF_ERR_CQP_COMPL_ERROR:
107 case IAVF_ERR_BACKING_PAGE_ERROR:
108 case IAVF_ERR_NO_PBLCHUNKS_AVAILABLE:
109 case IAVF_ERR_MEMCPY_FAILED:
110 case IAVF_ERR_SRQ_ENABLED:
111 case IAVF_ERR_ADMIN_QUEUE_ERROR:
112 case IAVF_ERR_ADMIN_QUEUE_FULL:
113 case IAVF_ERR_BAD_RDMA_CQE:
114 case IAVF_ERR_NVM_BLANK_MODE:
115 case IAVF_ERR_PE_DOORBELL_NOT_ENABLED:
116 case IAVF_ERR_DIAG_TEST_FAILED:
117 case IAVF_ERR_FIRMWARE_API_VERSION:
118 case IAVF_ERR_ADMIN_QUEUE_CRITICAL_ERROR:
119 return -EIO;
120 case IAVF_ERR_DEVICE_NOT_SUPPORTED:
121 return -ENODEV;
122 case IAVF_ERR_NO_AVAILABLE_VSI:
123 case IAVF_ERR_RING_FULL:
124 return -ENOSPC;
125 case IAVF_ERR_NO_MEMORY:
126 return -ENOMEM;
127 case IAVF_ERR_TIMEOUT:
128 case IAVF_ERR_ADMIN_QUEUE_TIMEOUT:
129 return -ETIMEDOUT;
130 case IAVF_ERR_NOT_IMPLEMENTED:
131 case IAVF_NOT_SUPPORTED:
132 return -EOPNOTSUPP;
133 case IAVF_ERR_ADMIN_QUEUE_NO_WORK:
134 return -EALREADY;
135 case IAVF_ERR_NOT_READY:
136 return -EBUSY;
137 case IAVF_ERR_BUF_TOO_SHORT:
138 return -EMSGSIZE;
139 }
140
141 return -EIO;
142 }
143
virtchnl_status_to_errno(enum virtchnl_status_code v_status)144 int virtchnl_status_to_errno(enum virtchnl_status_code v_status)
145 {
146 switch (v_status) {
147 case VIRTCHNL_STATUS_SUCCESS:
148 return 0;
149 case VIRTCHNL_STATUS_ERR_PARAM:
150 case VIRTCHNL_STATUS_ERR_INVALID_VF_ID:
151 return -EINVAL;
152 case VIRTCHNL_STATUS_ERR_NO_MEMORY:
153 return -ENOMEM;
154 case VIRTCHNL_STATUS_ERR_OPCODE_MISMATCH:
155 case VIRTCHNL_STATUS_ERR_CQP_COMPL_ERROR:
156 case VIRTCHNL_STATUS_ERR_ADMIN_QUEUE_ERROR:
157 return -EIO;
158 case VIRTCHNL_STATUS_ERR_NOT_SUPPORTED:
159 return -EOPNOTSUPP;
160 }
161
162 return -EIO;
163 }
164
165 /**
166 * iavf_pdev_to_adapter - go from pci_dev to adapter
167 * @pdev: pci_dev pointer
168 */
iavf_pdev_to_adapter(struct pci_dev * pdev)169 static struct iavf_adapter *iavf_pdev_to_adapter(struct pci_dev *pdev)
170 {
171 return netdev_priv(pci_get_drvdata(pdev));
172 }
173
174 /**
175 * iavf_is_reset_in_progress - Check if a reset is in progress
176 * @adapter: board private structure
177 */
iavf_is_reset_in_progress(struct iavf_adapter * adapter)178 static bool iavf_is_reset_in_progress(struct iavf_adapter *adapter)
179 {
180 if (adapter->state == __IAVF_RESETTING ||
181 adapter->flags & (IAVF_FLAG_RESET_PENDING |
182 IAVF_FLAG_RESET_NEEDED))
183 return true;
184
185 return false;
186 }
187
188 /**
189 * iavf_allocate_dma_mem_d - OS specific memory alloc for shared code
190 * @hw: pointer to the HW structure
191 * @mem: ptr to mem struct to fill out
192 * @size: size of memory requested
193 * @alignment: what to align the allocation to
194 **/
iavf_allocate_dma_mem_d(struct iavf_hw * hw,struct iavf_dma_mem * mem,u64 size,u32 alignment)195 enum iavf_status iavf_allocate_dma_mem_d(struct iavf_hw *hw,
196 struct iavf_dma_mem *mem,
197 u64 size, u32 alignment)
198 {
199 struct iavf_adapter *adapter = (struct iavf_adapter *)hw->back;
200
201 if (!mem)
202 return IAVF_ERR_PARAM;
203
204 mem->size = ALIGN(size, alignment);
205 mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
206 (dma_addr_t *)&mem->pa, GFP_KERNEL);
207 if (mem->va)
208 return 0;
209 else
210 return IAVF_ERR_NO_MEMORY;
211 }
212
213 /**
214 * iavf_free_dma_mem - wrapper for DMA memory freeing
215 * @hw: pointer to the HW structure
216 * @mem: ptr to mem struct to free
217 **/
iavf_free_dma_mem(struct iavf_hw * hw,struct iavf_dma_mem * mem)218 enum iavf_status iavf_free_dma_mem(struct iavf_hw *hw, struct iavf_dma_mem *mem)
219 {
220 struct iavf_adapter *adapter = (struct iavf_adapter *)hw->back;
221
222 if (!mem || !mem->va)
223 return IAVF_ERR_PARAM;
224 dma_free_coherent(&adapter->pdev->dev, mem->size,
225 mem->va, (dma_addr_t)mem->pa);
226 return 0;
227 }
228
229 /**
230 * iavf_allocate_virt_mem - virt memory alloc wrapper
231 * @hw: pointer to the HW structure
232 * @mem: ptr to mem struct to fill out
233 * @size: size of memory requested
234 **/
iavf_allocate_virt_mem(struct iavf_hw * hw,struct iavf_virt_mem * mem,u32 size)235 enum iavf_status iavf_allocate_virt_mem(struct iavf_hw *hw,
236 struct iavf_virt_mem *mem, u32 size)
237 {
238 if (!mem)
239 return IAVF_ERR_PARAM;
240
241 mem->size = size;
242 mem->va = kzalloc(size, GFP_KERNEL);
243
244 if (mem->va)
245 return 0;
246 else
247 return IAVF_ERR_NO_MEMORY;
248 }
249
250 /**
251 * iavf_free_virt_mem - virt memory free wrapper
252 * @hw: pointer to the HW structure
253 * @mem: ptr to mem struct to free
254 **/
iavf_free_virt_mem(struct iavf_hw * hw,struct iavf_virt_mem * mem)255 void iavf_free_virt_mem(struct iavf_hw *hw, struct iavf_virt_mem *mem)
256 {
257 kfree(mem->va);
258 }
259
260 /**
261 * iavf_schedule_reset - Set the flags and schedule a reset event
262 * @adapter: board private structure
263 * @flags: IAVF_FLAG_RESET_PENDING or IAVF_FLAG_RESET_NEEDED
264 **/
iavf_schedule_reset(struct iavf_adapter * adapter,u64 flags)265 void iavf_schedule_reset(struct iavf_adapter *adapter, u64 flags)
266 {
267 if (!test_bit(__IAVF_IN_REMOVE_TASK, &adapter->crit_section) &&
268 !(adapter->flags &
269 (IAVF_FLAG_RESET_PENDING | IAVF_FLAG_RESET_NEEDED))) {
270 adapter->flags |= flags;
271 queue_work(adapter->wq, &adapter->reset_task);
272 }
273 }
274
275 /**
276 * iavf_schedule_aq_request - Set the flags and schedule aq request
277 * @adapter: board private structure
278 * @flags: requested aq flags
279 **/
iavf_schedule_aq_request(struct iavf_adapter * adapter,u64 flags)280 void iavf_schedule_aq_request(struct iavf_adapter *adapter, u64 flags)
281 {
282 adapter->aq_required |= flags;
283 mod_delayed_work(adapter->wq, &adapter->watchdog_task, 0);
284 }
285
286 /**
287 * iavf_tx_timeout - Respond to a Tx Hang
288 * @netdev: network interface device structure
289 * @txqueue: queue number that is timing out
290 **/
iavf_tx_timeout(struct net_device * netdev,unsigned int txqueue)291 static void iavf_tx_timeout(struct net_device *netdev, unsigned int txqueue)
292 {
293 struct iavf_adapter *adapter = netdev_priv(netdev);
294
295 adapter->tx_timeout_count++;
296 iavf_schedule_reset(adapter, IAVF_FLAG_RESET_NEEDED);
297 }
298
299 /**
300 * iavf_misc_irq_disable - Mask off interrupt generation on the NIC
301 * @adapter: board private structure
302 **/
iavf_misc_irq_disable(struct iavf_adapter * adapter)303 static void iavf_misc_irq_disable(struct iavf_adapter *adapter)
304 {
305 struct iavf_hw *hw = &adapter->hw;
306
307 if (!adapter->msix_entries)
308 return;
309
310 wr32(hw, IAVF_VFINT_DYN_CTL01, 0);
311
312 iavf_flush(hw);
313
314 synchronize_irq(adapter->msix_entries[0].vector);
315 }
316
317 /**
318 * iavf_misc_irq_enable - Enable default interrupt generation settings
319 * @adapter: board private structure
320 **/
iavf_misc_irq_enable(struct iavf_adapter * adapter)321 static void iavf_misc_irq_enable(struct iavf_adapter *adapter)
322 {
323 struct iavf_hw *hw = &adapter->hw;
324
325 wr32(hw, IAVF_VFINT_DYN_CTL01, IAVF_VFINT_DYN_CTL01_INTENA_MASK |
326 IAVF_VFINT_DYN_CTL01_ITR_INDX_MASK);
327 wr32(hw, IAVF_VFINT_ICR0_ENA1, IAVF_VFINT_ICR0_ENA1_ADMINQ_MASK);
328
329 iavf_flush(hw);
330 }
331
332 /**
333 * iavf_irq_disable - Mask off interrupt generation on the NIC
334 * @adapter: board private structure
335 **/
iavf_irq_disable(struct iavf_adapter * adapter)336 static void iavf_irq_disable(struct iavf_adapter *adapter)
337 {
338 int i;
339 struct iavf_hw *hw = &adapter->hw;
340
341 if (!adapter->msix_entries)
342 return;
343
344 for (i = 1; i < adapter->num_msix_vectors; i++) {
345 wr32(hw, IAVF_VFINT_DYN_CTLN1(i - 1), 0);
346 synchronize_irq(adapter->msix_entries[i].vector);
347 }
348 iavf_flush(hw);
349 }
350
351 /**
352 * iavf_irq_enable_queues - Enable interrupt for all queues
353 * @adapter: board private structure
354 **/
iavf_irq_enable_queues(struct iavf_adapter * adapter)355 static void iavf_irq_enable_queues(struct iavf_adapter *adapter)
356 {
357 struct iavf_hw *hw = &adapter->hw;
358 int i;
359
360 for (i = 1; i < adapter->num_msix_vectors; i++) {
361 wr32(hw, IAVF_VFINT_DYN_CTLN1(i - 1),
362 IAVF_VFINT_DYN_CTLN1_INTENA_MASK |
363 IAVF_VFINT_DYN_CTLN1_ITR_INDX_MASK);
364 }
365 }
366
367 /**
368 * iavf_irq_enable - Enable default interrupt generation settings
369 * @adapter: board private structure
370 * @flush: boolean value whether to run rd32()
371 **/
iavf_irq_enable(struct iavf_adapter * adapter,bool flush)372 void iavf_irq_enable(struct iavf_adapter *adapter, bool flush)
373 {
374 struct iavf_hw *hw = &adapter->hw;
375
376 iavf_misc_irq_enable(adapter);
377 iavf_irq_enable_queues(adapter);
378
379 if (flush)
380 iavf_flush(hw);
381 }
382
383 /**
384 * iavf_msix_aq - Interrupt handler for vector 0
385 * @irq: interrupt number
386 * @data: pointer to netdev
387 **/
iavf_msix_aq(int irq,void * data)388 static irqreturn_t iavf_msix_aq(int irq, void *data)
389 {
390 struct net_device *netdev = data;
391 struct iavf_adapter *adapter = netdev_priv(netdev);
392 struct iavf_hw *hw = &adapter->hw;
393
394 /* handle non-queue interrupts, these reads clear the registers */
395 rd32(hw, IAVF_VFINT_ICR01);
396 rd32(hw, IAVF_VFINT_ICR0_ENA1);
397
398 if (adapter->state != __IAVF_REMOVE)
399 /* schedule work on the private workqueue */
400 queue_work(adapter->wq, &adapter->adminq_task);
401
402 return IRQ_HANDLED;
403 }
404
405 /**
406 * iavf_msix_clean_rings - MSIX mode Interrupt Handler
407 * @irq: interrupt number
408 * @data: pointer to a q_vector
409 **/
iavf_msix_clean_rings(int irq,void * data)410 static irqreturn_t iavf_msix_clean_rings(int irq, void *data)
411 {
412 struct iavf_q_vector *q_vector = data;
413
414 if (!q_vector->tx.ring && !q_vector->rx.ring)
415 return IRQ_HANDLED;
416
417 napi_schedule_irqoff(&q_vector->napi);
418
419 return IRQ_HANDLED;
420 }
421
422 /**
423 * iavf_map_vector_to_rxq - associate irqs with rx queues
424 * @adapter: board private structure
425 * @v_idx: interrupt number
426 * @r_idx: queue number
427 **/
428 static void
iavf_map_vector_to_rxq(struct iavf_adapter * adapter,int v_idx,int r_idx)429 iavf_map_vector_to_rxq(struct iavf_adapter *adapter, int v_idx, int r_idx)
430 {
431 struct iavf_q_vector *q_vector = &adapter->q_vectors[v_idx];
432 struct iavf_ring *rx_ring = &adapter->rx_rings[r_idx];
433 struct iavf_hw *hw = &adapter->hw;
434
435 rx_ring->q_vector = q_vector;
436 rx_ring->next = q_vector->rx.ring;
437 rx_ring->vsi = &adapter->vsi;
438 q_vector->rx.ring = rx_ring;
439 q_vector->rx.count++;
440 q_vector->rx.next_update = jiffies + 1;
441 q_vector->rx.target_itr = ITR_TO_REG(rx_ring->itr_setting);
442 q_vector->ring_mask |= BIT(r_idx);
443 wr32(hw, IAVF_VFINT_ITRN1(IAVF_RX_ITR, q_vector->reg_idx),
444 q_vector->rx.current_itr >> 1);
445 q_vector->rx.current_itr = q_vector->rx.target_itr;
446 }
447
448 /**
449 * iavf_map_vector_to_txq - associate irqs with tx queues
450 * @adapter: board private structure
451 * @v_idx: interrupt number
452 * @t_idx: queue number
453 **/
454 static void
iavf_map_vector_to_txq(struct iavf_adapter * adapter,int v_idx,int t_idx)455 iavf_map_vector_to_txq(struct iavf_adapter *adapter, int v_idx, int t_idx)
456 {
457 struct iavf_q_vector *q_vector = &adapter->q_vectors[v_idx];
458 struct iavf_ring *tx_ring = &adapter->tx_rings[t_idx];
459 struct iavf_hw *hw = &adapter->hw;
460
461 tx_ring->q_vector = q_vector;
462 tx_ring->next = q_vector->tx.ring;
463 tx_ring->vsi = &adapter->vsi;
464 q_vector->tx.ring = tx_ring;
465 q_vector->tx.count++;
466 q_vector->tx.next_update = jiffies + 1;
467 q_vector->tx.target_itr = ITR_TO_REG(tx_ring->itr_setting);
468 q_vector->num_ringpairs++;
469 wr32(hw, IAVF_VFINT_ITRN1(IAVF_TX_ITR, q_vector->reg_idx),
470 q_vector->tx.target_itr >> 1);
471 q_vector->tx.current_itr = q_vector->tx.target_itr;
472 }
473
474 /**
475 * iavf_map_rings_to_vectors - Maps descriptor rings to vectors
476 * @adapter: board private structure to initialize
477 *
478 * This function maps descriptor rings to the queue-specific vectors
479 * we were allotted through the MSI-X enabling code. Ideally, we'd have
480 * one vector per ring/queue, but on a constrained vector budget, we
481 * group the rings as "efficiently" as possible. You would add new
482 * mapping configurations in here.
483 **/
iavf_map_rings_to_vectors(struct iavf_adapter * adapter)484 static void iavf_map_rings_to_vectors(struct iavf_adapter *adapter)
485 {
486 int rings_remaining = adapter->num_active_queues;
487 int ridx = 0, vidx = 0;
488 int q_vectors;
489
490 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
491
492 for (; ridx < rings_remaining; ridx++) {
493 iavf_map_vector_to_rxq(adapter, vidx, ridx);
494 iavf_map_vector_to_txq(adapter, vidx, ridx);
495
496 /* In the case where we have more queues than vectors, continue
497 * round-robin on vectors until all queues are mapped.
498 */
499 if (++vidx >= q_vectors)
500 vidx = 0;
501 }
502
503 adapter->aq_required |= IAVF_FLAG_AQ_MAP_VECTORS;
504 }
505
506 /**
507 * iavf_request_traffic_irqs - Initialize MSI-X interrupts
508 * @adapter: board private structure
509 * @basename: device basename
510 *
511 * Allocates MSI-X vectors for tx and rx handling, and requests
512 * interrupts from the kernel.
513 **/
514 static int
iavf_request_traffic_irqs(struct iavf_adapter * adapter,char * basename)515 iavf_request_traffic_irqs(struct iavf_adapter *adapter, char *basename)
516 {
517 unsigned int vector, q_vectors;
518 unsigned int rx_int_idx = 0, tx_int_idx = 0;
519 int irq_num, err;
520
521 iavf_irq_disable(adapter);
522 /* Decrement for Other and TCP Timer vectors */
523 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
524
525 for (vector = 0; vector < q_vectors; vector++) {
526 struct iavf_q_vector *q_vector = &adapter->q_vectors[vector];
527
528 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
529
530 if (q_vector->tx.ring && q_vector->rx.ring) {
531 snprintf(q_vector->name, sizeof(q_vector->name),
532 "iavf-%s-TxRx-%u", basename, rx_int_idx++);
533 tx_int_idx++;
534 } else if (q_vector->rx.ring) {
535 snprintf(q_vector->name, sizeof(q_vector->name),
536 "iavf-%s-rx-%u", basename, rx_int_idx++);
537 } else if (q_vector->tx.ring) {
538 snprintf(q_vector->name, sizeof(q_vector->name),
539 "iavf-%s-tx-%u", basename, tx_int_idx++);
540 } else {
541 /* skip this unused q_vector */
542 continue;
543 }
544 err = request_irq(irq_num,
545 iavf_msix_clean_rings,
546 0,
547 q_vector->name,
548 q_vector);
549 if (err) {
550 dev_info(&adapter->pdev->dev,
551 "Request_irq failed, error: %d\n", err);
552 goto free_queue_irqs;
553 }
554 }
555
556 return 0;
557
558 free_queue_irqs:
559 while (vector) {
560 vector--;
561 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
562 free_irq(irq_num, &adapter->q_vectors[vector]);
563 }
564 return err;
565 }
566
567 /**
568 * iavf_request_misc_irq - Initialize MSI-X interrupts
569 * @adapter: board private structure
570 *
571 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
572 * vector is only for the admin queue, and stays active even when the netdev
573 * is closed.
574 **/
iavf_request_misc_irq(struct iavf_adapter * adapter)575 static int iavf_request_misc_irq(struct iavf_adapter *adapter)
576 {
577 struct net_device *netdev = adapter->netdev;
578 int err;
579
580 snprintf(adapter->misc_vector_name,
581 sizeof(adapter->misc_vector_name) - 1, "iavf-%s:mbx",
582 dev_name(&adapter->pdev->dev));
583 err = request_irq(adapter->msix_entries[0].vector,
584 &iavf_msix_aq, 0,
585 adapter->misc_vector_name, netdev);
586 if (err) {
587 dev_err(&adapter->pdev->dev,
588 "request_irq for %s failed: %d\n",
589 adapter->misc_vector_name, err);
590 free_irq(adapter->msix_entries[0].vector, netdev);
591 }
592 return err;
593 }
594
595 /**
596 * iavf_free_traffic_irqs - Free MSI-X interrupts
597 * @adapter: board private structure
598 *
599 * Frees all MSI-X vectors other than 0.
600 **/
iavf_free_traffic_irqs(struct iavf_adapter * adapter)601 static void iavf_free_traffic_irqs(struct iavf_adapter *adapter)
602 {
603 struct iavf_q_vector *q_vector;
604 int vector, irq_num, q_vectors;
605
606 if (!adapter->msix_entries)
607 return;
608
609 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
610
611 for (vector = 0; vector < q_vectors; vector++) {
612 q_vector = &adapter->q_vectors[vector];
613 netif_napi_set_irq_locked(&q_vector->napi, -1);
614 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
615 free_irq(irq_num, q_vector);
616 }
617 }
618
619 /**
620 * iavf_free_misc_irq - Free MSI-X miscellaneous vector
621 * @adapter: board private structure
622 *
623 * Frees MSI-X vector 0.
624 **/
iavf_free_misc_irq(struct iavf_adapter * adapter)625 static void iavf_free_misc_irq(struct iavf_adapter *adapter)
626 {
627 struct net_device *netdev = adapter->netdev;
628
629 if (!adapter->msix_entries)
630 return;
631
632 free_irq(adapter->msix_entries[0].vector, netdev);
633 }
634
635 /**
636 * iavf_configure_tx - Configure Transmit Unit after Reset
637 * @adapter: board private structure
638 *
639 * Configure the Tx unit of the MAC after a reset.
640 **/
iavf_configure_tx(struct iavf_adapter * adapter)641 static void iavf_configure_tx(struct iavf_adapter *adapter)
642 {
643 struct iavf_hw *hw = &adapter->hw;
644 int i;
645
646 for (i = 0; i < adapter->num_active_queues; i++)
647 adapter->tx_rings[i].tail = hw->hw_addr + IAVF_QTX_TAIL1(i);
648 }
649
650 /**
651 * iavf_select_rx_desc_format - Select Rx descriptor format
652 * @adapter: adapter private structure
653 *
654 * Select what Rx descriptor format based on availability and enabled
655 * features.
656 *
657 * Return: the desired RXDID to select for a given Rx queue, as defined by
658 * enum virtchnl_rxdid_format.
659 */
iavf_select_rx_desc_format(const struct iavf_adapter * adapter)660 static u8 iavf_select_rx_desc_format(const struct iavf_adapter *adapter)
661 {
662 u64 rxdids = adapter->supp_rxdids;
663
664 /* If we did not negotiate VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC, we must
665 * stick with the default value of the legacy 32 byte format.
666 */
667 if (!IAVF_RXDID_ALLOWED(adapter))
668 return VIRTCHNL_RXDID_1_32B_BASE;
669
670 /* Rx timestamping requires the use of flexible NIC descriptors */
671 if (iavf_ptp_cap_supported(adapter, VIRTCHNL_1588_PTP_CAP_RX_TSTAMP)) {
672 if (rxdids & BIT(VIRTCHNL_RXDID_2_FLEX_SQ_NIC))
673 return VIRTCHNL_RXDID_2_FLEX_SQ_NIC;
674
675 pci_warn(adapter->pdev,
676 "Unable to negotiate flexible descriptor format\n");
677 }
678
679 /* Warn if the PF does not list support for the default legacy
680 * descriptor format. This shouldn't happen, as this is the format
681 * used if VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC is not supported. It is
682 * likely caused by a bug in the PF implementation failing to indicate
683 * support for the format.
684 */
685 if (!(rxdids & VIRTCHNL_RXDID_1_32B_BASE_M))
686 netdev_warn(adapter->netdev, "PF does not list support for default Rx descriptor format\n");
687
688 return VIRTCHNL_RXDID_1_32B_BASE;
689 }
690
691 /**
692 * iavf_configure_rx - Configure Receive Unit after Reset
693 * @adapter: board private structure
694 *
695 * Configure the Rx unit of the MAC after a reset.
696 **/
iavf_configure_rx(struct iavf_adapter * adapter)697 static void iavf_configure_rx(struct iavf_adapter *adapter)
698 {
699 struct iavf_hw *hw = &adapter->hw;
700
701 adapter->rxdid = iavf_select_rx_desc_format(adapter);
702
703 for (u32 i = 0; i < adapter->num_active_queues; i++) {
704 adapter->rx_rings[i].tail = hw->hw_addr + IAVF_QRX_TAIL1(i);
705 adapter->rx_rings[i].rxdid = adapter->rxdid;
706 }
707 }
708
709 /**
710 * iavf_find_vlan - Search filter list for specific vlan filter
711 * @adapter: board private structure
712 * @vlan: vlan tag
713 *
714 * Returns ptr to the filter object or NULL. Must be called while holding the
715 * mac_vlan_list_lock.
716 **/
717 static struct
iavf_find_vlan(struct iavf_adapter * adapter,struct iavf_vlan vlan)718 iavf_vlan_filter *iavf_find_vlan(struct iavf_adapter *adapter,
719 struct iavf_vlan vlan)
720 {
721 struct iavf_vlan_filter *f;
722
723 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
724 if (f->vlan.vid == vlan.vid &&
725 f->vlan.tpid == vlan.tpid)
726 return f;
727 }
728
729 return NULL;
730 }
731
732 /**
733 * iavf_add_vlan - Add a vlan filter to the list
734 * @adapter: board private structure
735 * @vlan: VLAN tag
736 *
737 * Returns ptr to the filter object or NULL when no memory available.
738 **/
739 static struct
iavf_add_vlan(struct iavf_adapter * adapter,struct iavf_vlan vlan)740 iavf_vlan_filter *iavf_add_vlan(struct iavf_adapter *adapter,
741 struct iavf_vlan vlan)
742 {
743 struct iavf_vlan_filter *f = NULL;
744
745 spin_lock_bh(&adapter->mac_vlan_list_lock);
746
747 f = iavf_find_vlan(adapter, vlan);
748 if (!f) {
749 f = kzalloc_obj(*f, GFP_ATOMIC);
750 if (!f)
751 goto clearout;
752
753 f->vlan = vlan;
754
755 list_add_tail(&f->list, &adapter->vlan_filter_list);
756 f->state = IAVF_VLAN_ADD;
757 adapter->num_vlan_filters++;
758 iavf_schedule_aq_request(adapter, IAVF_FLAG_AQ_ADD_VLAN_FILTER);
759 } else if (f->state == IAVF_VLAN_REMOVE) {
760 /* DEL not yet sent to PF, cancel it */
761 f->state = IAVF_VLAN_ACTIVE;
762 } else if (f->state == IAVF_VLAN_REMOVING) {
763 /* DEL already sent to PF, re-add after completion */
764 f->state = IAVF_VLAN_ADD;
765 iavf_schedule_aq_request(adapter,
766 IAVF_FLAG_AQ_ADD_VLAN_FILTER);
767 }
768
769 clearout:
770 spin_unlock_bh(&adapter->mac_vlan_list_lock);
771 return f;
772 }
773
774 /**
775 * iavf_del_vlan - Remove a vlan filter from the list
776 * @adapter: board private structure
777 * @vlan: VLAN tag
778 **/
iavf_del_vlan(struct iavf_adapter * adapter,struct iavf_vlan vlan)779 static void iavf_del_vlan(struct iavf_adapter *adapter, struct iavf_vlan vlan)
780 {
781 struct iavf_vlan_filter *f;
782
783 spin_lock_bh(&adapter->mac_vlan_list_lock);
784
785 f = iavf_find_vlan(adapter, vlan);
786 if (f) {
787 /* IAVF_ADD_VLAN means that VLAN wasn't even added yet.
788 * Remove it from the list.
789 */
790 if (f->state == IAVF_VLAN_ADD) {
791 list_del(&f->list);
792 kfree(f);
793 adapter->num_vlan_filters--;
794 } else if (f->state != IAVF_VLAN_REMOVING) {
795 f->state = IAVF_VLAN_REMOVE;
796 iavf_schedule_aq_request(adapter,
797 IAVF_FLAG_AQ_DEL_VLAN_FILTER);
798 }
799 /* If REMOVING, DEL is already sent to PF; completion
800 * handler will free the filter when PF confirms.
801 */
802 }
803
804 spin_unlock_bh(&adapter->mac_vlan_list_lock);
805 }
806
807
808 /**
809 * iavf_get_num_vlans_added - get number of VLANs added
810 * @adapter: board private structure
811 */
iavf_get_num_vlans_added(struct iavf_adapter * adapter)812 u16 iavf_get_num_vlans_added(struct iavf_adapter *adapter)
813 {
814 return adapter->num_vlan_filters;
815 }
816
817 /**
818 * iavf_get_max_vlans_allowed - get maximum VLANs allowed for this VF
819 * @adapter: board private structure
820 *
821 * This depends on the negotiated VLAN capability. For VIRTCHNL_VF_OFFLOAD_VLAN,
822 * do not impose a limit as that maintains current behavior and for
823 * VIRTCHNL_VF_OFFLOAD_VLAN_V2, use the maximum allowed sent from the PF.
824 **/
iavf_get_max_vlans_allowed(struct iavf_adapter * adapter)825 static u16 iavf_get_max_vlans_allowed(struct iavf_adapter *adapter)
826 {
827 /* don't impose any limit for VIRTCHNL_VF_OFFLOAD_VLAN since there has
828 * never been a limit on the VF driver side
829 */
830 if (VLAN_ALLOWED(adapter))
831 return VLAN_N_VID;
832 else if (VLAN_V2_ALLOWED(adapter))
833 return adapter->vlan_v2_caps.filtering.max_filters;
834
835 return 0;
836 }
837
838 /**
839 * iavf_max_vlans_added - check if maximum VLANs allowed already exist
840 * @adapter: board private structure
841 **/
iavf_max_vlans_added(struct iavf_adapter * adapter)842 static bool iavf_max_vlans_added(struct iavf_adapter *adapter)
843 {
844 if (iavf_get_num_vlans_added(adapter) <
845 iavf_get_max_vlans_allowed(adapter))
846 return false;
847
848 return true;
849 }
850
851 /**
852 * iavf_vlan_rx_add_vid - Add a VLAN filter to a device
853 * @netdev: network device struct
854 * @proto: unused protocol data
855 * @vid: VLAN tag
856 **/
iavf_vlan_rx_add_vid(struct net_device * netdev,__always_unused __be16 proto,u16 vid)857 static int iavf_vlan_rx_add_vid(struct net_device *netdev,
858 __always_unused __be16 proto, u16 vid)
859 {
860 struct iavf_adapter *adapter = netdev_priv(netdev);
861
862 /* Do not track VLAN 0 filter, always added by the PF on VF init */
863 if (!vid)
864 return 0;
865
866 if (!VLAN_FILTERING_ALLOWED(adapter))
867 return -EIO;
868
869 if (iavf_max_vlans_added(adapter)) {
870 netdev_err(netdev, "Max allowed VLAN filters %u. Remove existing VLANs or disable filtering via Ethtool if supported.\n",
871 iavf_get_max_vlans_allowed(adapter));
872 return -EIO;
873 }
874
875 if (!iavf_add_vlan(adapter, IAVF_VLAN(vid, be16_to_cpu(proto))))
876 return -ENOMEM;
877
878 return 0;
879 }
880
881 /**
882 * iavf_vlan_rx_kill_vid - Remove a VLAN filter from a device
883 * @netdev: network device struct
884 * @proto: unused protocol data
885 * @vid: VLAN tag
886 **/
iavf_vlan_rx_kill_vid(struct net_device * netdev,__always_unused __be16 proto,u16 vid)887 static int iavf_vlan_rx_kill_vid(struct net_device *netdev,
888 __always_unused __be16 proto, u16 vid)
889 {
890 struct iavf_adapter *adapter = netdev_priv(netdev);
891
892 /* We do not track VLAN 0 filter */
893 if (!vid)
894 return 0;
895
896 iavf_del_vlan(adapter, IAVF_VLAN(vid, be16_to_cpu(proto)));
897 return 0;
898 }
899
900 /**
901 * iavf_find_filter - Search filter list for specific mac filter
902 * @adapter: board private structure
903 * @macaddr: the MAC address
904 *
905 * Returns ptr to the filter object or NULL. Must be called while holding the
906 * mac_vlan_list_lock.
907 **/
908 static struct
iavf_find_filter(struct iavf_adapter * adapter,const u8 * macaddr)909 iavf_mac_filter *iavf_find_filter(struct iavf_adapter *adapter,
910 const u8 *macaddr)
911 {
912 struct iavf_mac_filter *f;
913
914 if (!macaddr)
915 return NULL;
916
917 list_for_each_entry(f, &adapter->mac_filter_list, list) {
918 if (ether_addr_equal(macaddr, f->macaddr))
919 return f;
920 }
921 return NULL;
922 }
923
924 /**
925 * iavf_add_filter - Add a mac filter to the filter list
926 * @adapter: board private structure
927 * @macaddr: the MAC address
928 *
929 * Returns ptr to the filter object or NULL when no memory available.
930 **/
iavf_add_filter(struct iavf_adapter * adapter,const u8 * macaddr)931 struct iavf_mac_filter *iavf_add_filter(struct iavf_adapter *adapter,
932 const u8 *macaddr)
933 {
934 struct iavf_mac_filter *f;
935
936 if (!macaddr)
937 return NULL;
938
939 f = iavf_find_filter(adapter, macaddr);
940 if (!f) {
941 f = kzalloc_obj(*f, GFP_ATOMIC);
942 if (!f)
943 return f;
944
945 ether_addr_copy(f->macaddr, macaddr);
946
947 list_add_tail(&f->list, &adapter->mac_filter_list);
948 f->add = true;
949 f->add_handled = false;
950 f->is_new_mac = true;
951 f->is_primary = ether_addr_equal(macaddr, adapter->hw.mac.addr);
952 adapter->aq_required |= IAVF_FLAG_AQ_ADD_MAC_FILTER;
953 } else {
954 f->remove = false;
955 }
956
957 return f;
958 }
959
960 /**
961 * iavf_replace_primary_mac - Replace current primary address
962 * @adapter: board private structure
963 * @new_mac: new MAC address to be applied
964 *
965 * Replace current dev_addr and send request to PF for removal of previous
966 * primary MAC address filter and addition of new primary MAC filter.
967 * Return 0 for success, -ENOMEM for failure.
968 *
969 * Do not call this with mac_vlan_list_lock!
970 **/
iavf_replace_primary_mac(struct iavf_adapter * adapter,const u8 * new_mac)971 static int iavf_replace_primary_mac(struct iavf_adapter *adapter,
972 const u8 *new_mac)
973 {
974 struct iavf_hw *hw = &adapter->hw;
975 struct iavf_mac_filter *new_f;
976 struct iavf_mac_filter *old_f;
977
978 spin_lock_bh(&adapter->mac_vlan_list_lock);
979
980 new_f = iavf_add_filter(adapter, new_mac);
981 if (!new_f) {
982 spin_unlock_bh(&adapter->mac_vlan_list_lock);
983 return -ENOMEM;
984 }
985
986 old_f = iavf_find_filter(adapter, hw->mac.addr);
987 if (old_f) {
988 old_f->is_primary = false;
989 old_f->remove = true;
990 adapter->aq_required |= IAVF_FLAG_AQ_DEL_MAC_FILTER;
991 }
992 /* Always send the request to add if changing primary MAC,
993 * even if filter is already present on the list
994 */
995 new_f->is_primary = true;
996 new_f->add = true;
997 ether_addr_copy(hw->mac.addr, new_mac);
998
999 spin_unlock_bh(&adapter->mac_vlan_list_lock);
1000
1001 /* schedule the watchdog task to immediately process the request */
1002 iavf_schedule_aq_request(adapter, IAVF_FLAG_AQ_ADD_MAC_FILTER);
1003 return 0;
1004 }
1005
1006 /**
1007 * iavf_is_mac_set_handled - wait for a response to set MAC from PF
1008 * @netdev: network interface device structure
1009 * @macaddr: MAC address to set
1010 *
1011 * Returns true on success, false on failure
1012 */
iavf_is_mac_set_handled(struct net_device * netdev,const u8 * macaddr)1013 static bool iavf_is_mac_set_handled(struct net_device *netdev,
1014 const u8 *macaddr)
1015 {
1016 struct iavf_adapter *adapter = netdev_priv(netdev);
1017 struct iavf_mac_filter *f;
1018 bool ret = false;
1019
1020 spin_lock_bh(&adapter->mac_vlan_list_lock);
1021
1022 f = iavf_find_filter(adapter, macaddr);
1023
1024 if (!f || (!f->add && f->add_handled))
1025 ret = true;
1026
1027 spin_unlock_bh(&adapter->mac_vlan_list_lock);
1028
1029 return ret;
1030 }
1031
1032 /**
1033 * iavf_set_mac - NDO callback to set port MAC address
1034 * @netdev: network interface device structure
1035 * @p: pointer to an address structure
1036 *
1037 * Returns 0 on success, negative on failure
1038 */
iavf_set_mac(struct net_device * netdev,void * p)1039 static int iavf_set_mac(struct net_device *netdev, void *p)
1040 {
1041 struct iavf_adapter *adapter = netdev_priv(netdev);
1042 struct sockaddr *addr = p;
1043 int ret;
1044
1045 if (!is_valid_ether_addr(addr->sa_data))
1046 return -EADDRNOTAVAIL;
1047
1048 ret = iavf_replace_primary_mac(adapter, addr->sa_data);
1049
1050 if (ret)
1051 return ret;
1052
1053 ret = wait_event_interruptible_timeout(adapter->vc_waitqueue,
1054 iavf_is_mac_set_handled(netdev, addr->sa_data),
1055 msecs_to_jiffies(2500));
1056
1057 /* If ret < 0 then it means wait was interrupted.
1058 * If ret == 0 then it means we got a timeout.
1059 * else it means we got response for set MAC from PF,
1060 * check if netdev MAC was updated to requested MAC,
1061 * if yes then set MAC succeeded otherwise it failed return -EACCES
1062 */
1063 if (ret < 0)
1064 return ret;
1065
1066 if (!ret)
1067 return -EAGAIN;
1068
1069 if (!ether_addr_equal(netdev->dev_addr, addr->sa_data))
1070 return -EACCES;
1071
1072 return 0;
1073 }
1074
1075 /**
1076 * iavf_addr_sync - Callback for dev_(mc|uc)_sync to add address
1077 * @netdev: the netdevice
1078 * @addr: address to add
1079 *
1080 * Called by __dev_(mc|uc)_sync when an address needs to be added. We call
1081 * __dev_(uc|mc)_sync from .set_rx_mode and guarantee to hold the hash lock.
1082 */
iavf_addr_sync(struct net_device * netdev,const u8 * addr)1083 static int iavf_addr_sync(struct net_device *netdev, const u8 *addr)
1084 {
1085 struct iavf_adapter *adapter = netdev_priv(netdev);
1086
1087 if (iavf_add_filter(adapter, addr))
1088 return 0;
1089 else
1090 return -ENOMEM;
1091 }
1092
1093 /**
1094 * iavf_addr_unsync - Callback for dev_(mc|uc)_sync to remove address
1095 * @netdev: the netdevice
1096 * @addr: address to add
1097 *
1098 * Called by __dev_(mc|uc)_sync when an address needs to be removed. We call
1099 * __dev_(uc|mc)_sync from .set_rx_mode and guarantee to hold the hash lock.
1100 */
iavf_addr_unsync(struct net_device * netdev,const u8 * addr)1101 static int iavf_addr_unsync(struct net_device *netdev, const u8 *addr)
1102 {
1103 struct iavf_adapter *adapter = netdev_priv(netdev);
1104 struct iavf_mac_filter *f;
1105
1106 /* Under some circumstances, we might receive a request to delete
1107 * our own device address from our uc list. Because we store the
1108 * device address in the VSI's MAC/VLAN filter list, we need to ignore
1109 * such requests and not delete our device address from this list.
1110 */
1111 if (ether_addr_equal(addr, netdev->dev_addr))
1112 return 0;
1113
1114 f = iavf_find_filter(adapter, addr);
1115 if (f) {
1116 f->remove = true;
1117 adapter->aq_required |= IAVF_FLAG_AQ_DEL_MAC_FILTER;
1118 }
1119 return 0;
1120 }
1121
1122 /**
1123 * iavf_promiscuous_mode_changed - check if promiscuous mode bits changed
1124 * @adapter: device specific adapter
1125 */
iavf_promiscuous_mode_changed(struct iavf_adapter * adapter)1126 bool iavf_promiscuous_mode_changed(struct iavf_adapter *adapter)
1127 {
1128 return (adapter->current_netdev_promisc_flags ^ adapter->netdev->flags) &
1129 (IFF_PROMISC | IFF_ALLMULTI);
1130 }
1131
1132 /**
1133 * iavf_set_rx_mode - NDO callback to set the netdev filters
1134 * @netdev: network interface device structure
1135 * @uc: snapshot of uc address list
1136 * @mc: snapshot of mc address list
1137 **/
iavf_set_rx_mode(struct net_device * netdev,struct netdev_hw_addr_list * uc,struct netdev_hw_addr_list * mc)1138 static void iavf_set_rx_mode(struct net_device *netdev,
1139 struct netdev_hw_addr_list *uc,
1140 struct netdev_hw_addr_list *mc)
1141 {
1142 struct iavf_adapter *adapter = netdev_priv(netdev);
1143
1144 spin_lock_bh(&adapter->mac_vlan_list_lock);
1145 __hw_addr_sync_dev(uc, netdev, iavf_addr_sync, iavf_addr_unsync);
1146 __hw_addr_sync_dev(mc, netdev, iavf_addr_sync, iavf_addr_unsync);
1147 spin_unlock_bh(&adapter->mac_vlan_list_lock);
1148
1149 spin_lock_bh(&adapter->current_netdev_promisc_flags_lock);
1150 if (iavf_promiscuous_mode_changed(adapter))
1151 adapter->aq_required |= IAVF_FLAG_AQ_CONFIGURE_PROMISC_MODE;
1152 spin_unlock_bh(&adapter->current_netdev_promisc_flags_lock);
1153 }
1154
1155 /**
1156 * iavf_napi_enable_all - enable NAPI on all queue vectors
1157 * @adapter: board private structure
1158 **/
iavf_napi_enable_all(struct iavf_adapter * adapter)1159 static void iavf_napi_enable_all(struct iavf_adapter *adapter)
1160 {
1161 int q_idx;
1162 struct iavf_q_vector *q_vector;
1163 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1164
1165 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1166 struct napi_struct *napi;
1167
1168 q_vector = &adapter->q_vectors[q_idx];
1169 napi = &q_vector->napi;
1170 napi_enable_locked(napi);
1171 }
1172 }
1173
1174 /**
1175 * iavf_napi_disable_all - disable NAPI on all queue vectors
1176 * @adapter: board private structure
1177 **/
iavf_napi_disable_all(struct iavf_adapter * adapter)1178 static void iavf_napi_disable_all(struct iavf_adapter *adapter)
1179 {
1180 int q_idx;
1181 struct iavf_q_vector *q_vector;
1182 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1183
1184 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1185 q_vector = &adapter->q_vectors[q_idx];
1186 napi_disable_locked(&q_vector->napi);
1187 }
1188 }
1189
1190 /**
1191 * iavf_configure - set up transmit and receive data structures
1192 * @adapter: board private structure
1193 **/
iavf_configure(struct iavf_adapter * adapter)1194 static void iavf_configure(struct iavf_adapter *adapter)
1195 {
1196 struct net_device *netdev = adapter->netdev;
1197 int i;
1198
1199 netif_addr_lock_bh(netdev);
1200 iavf_set_rx_mode(netdev, &netdev->uc, &netdev->mc);
1201 netif_addr_unlock_bh(netdev);
1202
1203 iavf_configure_tx(adapter);
1204 iavf_configure_rx(adapter);
1205 adapter->aq_required |= IAVF_FLAG_AQ_CONFIGURE_QUEUES;
1206
1207 for (i = 0; i < adapter->num_active_queues; i++) {
1208 struct iavf_ring *ring = &adapter->rx_rings[i];
1209
1210 iavf_alloc_rx_buffers(ring, IAVF_DESC_UNUSED(ring));
1211 }
1212 }
1213
1214 /**
1215 * iavf_up_complete - Finish the last steps of bringing up a connection
1216 * @adapter: board private structure
1217 */
iavf_up_complete(struct iavf_adapter * adapter)1218 static void iavf_up_complete(struct iavf_adapter *adapter)
1219 {
1220 netdev_assert_locked(adapter->netdev);
1221
1222 iavf_change_state(adapter, __IAVF_RUNNING);
1223 clear_bit(__IAVF_VSI_DOWN, adapter->vsi.state);
1224
1225 iavf_napi_enable_all(adapter);
1226
1227 iavf_schedule_aq_request(adapter, IAVF_FLAG_AQ_ENABLE_QUEUES);
1228 }
1229
1230 /**
1231 * iavf_clear_mac_filters - Remove MAC filters not sent to PF yet and mark
1232 * others to be removed.
1233 * @adapter: board private structure
1234 **/
iavf_clear_mac_filters(struct iavf_adapter * adapter)1235 static void iavf_clear_mac_filters(struct iavf_adapter *adapter)
1236 {
1237 struct iavf_mac_filter *f, *ftmp;
1238
1239 spin_lock_bh(&adapter->mac_vlan_list_lock);
1240 /* clear the sync flag on all filters */
1241 __dev_uc_unsync(adapter->netdev, NULL);
1242 __dev_mc_unsync(adapter->netdev, NULL);
1243
1244 /* remove all MAC filters */
1245 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1246 list) {
1247 if (f->add) {
1248 list_del(&f->list);
1249 kfree(f);
1250 } else {
1251 f->remove = true;
1252 }
1253 }
1254
1255 spin_unlock_bh(&adapter->mac_vlan_list_lock);
1256 }
1257
1258 /**
1259 * iavf_clear_cloud_filters - Remove cloud filters not sent to PF yet and
1260 * mark other to be removed.
1261 * @adapter: board private structure
1262 **/
iavf_clear_cloud_filters(struct iavf_adapter * adapter)1263 static void iavf_clear_cloud_filters(struct iavf_adapter *adapter)
1264 {
1265 struct iavf_cloud_filter *cf, *cftmp;
1266
1267 /* remove all cloud filters */
1268 spin_lock_bh(&adapter->cloud_filter_list_lock);
1269 list_for_each_entry_safe(cf, cftmp, &adapter->cloud_filter_list,
1270 list) {
1271 if (cf->add) {
1272 list_del(&cf->list);
1273 kfree(cf);
1274 adapter->num_cloud_filters--;
1275 } else {
1276 cf->del = true;
1277 }
1278 }
1279 spin_unlock_bh(&adapter->cloud_filter_list_lock);
1280 }
1281
1282 /**
1283 * iavf_clear_fdir_filters - Remove fdir filters not sent to PF yet and mark
1284 * other to be removed.
1285 * @adapter: board private structure
1286 **/
iavf_clear_fdir_filters(struct iavf_adapter * adapter)1287 static void iavf_clear_fdir_filters(struct iavf_adapter *adapter)
1288 {
1289 struct iavf_fdir_fltr *fdir;
1290
1291 /* remove all Flow Director filters */
1292 spin_lock_bh(&adapter->fdir_fltr_lock);
1293 list_for_each_entry(fdir, &adapter->fdir_list_head, list) {
1294 if (fdir->state == IAVF_FDIR_FLTR_ADD_REQUEST) {
1295 /* Cancel a request, keep filter as inactive */
1296 fdir->state = IAVF_FDIR_FLTR_INACTIVE;
1297 } else if (fdir->state == IAVF_FDIR_FLTR_ADD_PENDING ||
1298 fdir->state == IAVF_FDIR_FLTR_ACTIVE) {
1299 /* Disable filters which are active or have a pending
1300 * request to PF to be added
1301 */
1302 fdir->state = IAVF_FDIR_FLTR_DIS_REQUEST;
1303 }
1304 }
1305 spin_unlock_bh(&adapter->fdir_fltr_lock);
1306 }
1307
1308 /**
1309 * iavf_clear_adv_rss_conf - Remove adv rss conf not sent to PF yet and mark
1310 * other to be removed.
1311 * @adapter: board private structure
1312 **/
iavf_clear_adv_rss_conf(struct iavf_adapter * adapter)1313 static void iavf_clear_adv_rss_conf(struct iavf_adapter *adapter)
1314 {
1315 struct iavf_adv_rss *rss, *rsstmp;
1316
1317 /* remove all advance RSS configuration */
1318 spin_lock_bh(&adapter->adv_rss_lock);
1319 list_for_each_entry_safe(rss, rsstmp, &adapter->adv_rss_list_head,
1320 list) {
1321 if (rss->state == IAVF_ADV_RSS_ADD_REQUEST) {
1322 list_del(&rss->list);
1323 kfree(rss);
1324 } else {
1325 rss->state = IAVF_ADV_RSS_DEL_REQUEST;
1326 }
1327 }
1328 spin_unlock_bh(&adapter->adv_rss_lock);
1329 }
1330
1331 /**
1332 * iavf_down - Shutdown the connection processing
1333 * @adapter: board private structure
1334 */
iavf_down(struct iavf_adapter * adapter)1335 void iavf_down(struct iavf_adapter *adapter)
1336 {
1337 struct net_device *netdev = adapter->netdev;
1338
1339 netdev_assert_locked(netdev);
1340
1341 if (adapter->state <= __IAVF_DOWN_PENDING)
1342 return;
1343
1344 netif_carrier_off(netdev);
1345 netif_tx_disable(netdev);
1346 adapter->link_up = false;
1347 iavf_napi_disable_all(adapter);
1348 iavf_irq_disable(adapter);
1349
1350 iavf_clear_mac_filters(adapter);
1351 iavf_clear_cloud_filters(adapter);
1352 iavf_clear_fdir_filters(adapter);
1353 iavf_clear_adv_rss_conf(adapter);
1354
1355 if (adapter->flags & IAVF_FLAG_PF_COMMS_FAILED)
1356 return;
1357
1358 if (!test_bit(__IAVF_IN_REMOVE_TASK, &adapter->crit_section)) {
1359 /* cancel any current operation */
1360 adapter->current_op = VIRTCHNL_OP_UNKNOWN;
1361 /* Schedule operations to close down the HW. Don't wait
1362 * here for this to complete. The watchdog is still running
1363 * and it will take care of this.
1364 */
1365 if (!list_empty(&adapter->mac_filter_list))
1366 adapter->aq_required |= IAVF_FLAG_AQ_DEL_MAC_FILTER;
1367 if (!list_empty(&adapter->cloud_filter_list))
1368 adapter->aq_required |= IAVF_FLAG_AQ_DEL_CLOUD_FILTER;
1369 if (!list_empty(&adapter->fdir_list_head))
1370 adapter->aq_required |= IAVF_FLAG_AQ_DEL_FDIR_FILTER;
1371 if (!list_empty(&adapter->adv_rss_list_head))
1372 adapter->aq_required |= IAVF_FLAG_AQ_DEL_ADV_RSS_CFG;
1373 }
1374
1375 iavf_schedule_aq_request(adapter, IAVF_FLAG_AQ_DISABLE_QUEUES);
1376 }
1377
1378 /**
1379 * iavf_acquire_msix_vectors - Setup the MSIX capability
1380 * @adapter: board private structure
1381 * @vectors: number of vectors to request
1382 *
1383 * Work with the OS to set up the MSIX vectors needed.
1384 *
1385 * Returns 0 on success, negative on failure
1386 **/
1387 static int
iavf_acquire_msix_vectors(struct iavf_adapter * adapter,int vectors)1388 iavf_acquire_msix_vectors(struct iavf_adapter *adapter, int vectors)
1389 {
1390 int err, vector_threshold;
1391
1392 /* We'll want at least 3 (vector_threshold):
1393 * 0) Other (Admin Queue and link, mostly)
1394 * 1) TxQ[0] Cleanup
1395 * 2) RxQ[0] Cleanup
1396 */
1397 vector_threshold = MIN_MSIX_COUNT;
1398
1399 /* The more we get, the more we will assign to Tx/Rx Cleanup
1400 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1401 * Right now, we simply care about how many we'll get; we'll
1402 * set them up later while requesting irq's.
1403 */
1404 err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1405 vector_threshold, vectors);
1406 if (err < 0) {
1407 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1408 kfree(adapter->msix_entries);
1409 adapter->msix_entries = NULL;
1410 return err;
1411 }
1412
1413 /* Adjust for only the vectors we'll use, which is minimum
1414 * of max_msix_q_vectors + NONQ_VECS, or the number of
1415 * vectors we were allocated.
1416 */
1417 adapter->num_msix_vectors = err;
1418 return 0;
1419 }
1420
1421 /**
1422 * iavf_free_queues - Free memory for all rings
1423 * @adapter: board private structure to initialize
1424 *
1425 * Free all of the memory associated with queue pairs.
1426 **/
iavf_free_queues(struct iavf_adapter * adapter)1427 static void iavf_free_queues(struct iavf_adapter *adapter)
1428 {
1429 if (!adapter->vsi_res)
1430 return;
1431 adapter->num_active_queues = 0;
1432 kfree(adapter->tx_rings);
1433 adapter->tx_rings = NULL;
1434 kfree(adapter->rx_rings);
1435 adapter->rx_rings = NULL;
1436 }
1437
1438 /**
1439 * iavf_set_queue_vlan_tag_loc - set location for VLAN tag offload
1440 * @adapter: board private structure
1441 *
1442 * Based on negotiated capabilities, the VLAN tag needs to be inserted and/or
1443 * stripped in certain descriptor fields. Instead of checking the offload
1444 * capability bits in the hot path, cache the location the ring specific
1445 * flags.
1446 */
iavf_set_queue_vlan_tag_loc(struct iavf_adapter * adapter)1447 void iavf_set_queue_vlan_tag_loc(struct iavf_adapter *adapter)
1448 {
1449 int i;
1450
1451 for (i = 0; i < adapter->num_active_queues; i++) {
1452 struct iavf_ring *tx_ring = &adapter->tx_rings[i];
1453 struct iavf_ring *rx_ring = &adapter->rx_rings[i];
1454
1455 /* prevent multiple L2TAG bits being set after VFR */
1456 tx_ring->flags &=
1457 ~(IAVF_TXRX_FLAGS_VLAN_TAG_LOC_L2TAG1 |
1458 IAVF_TXR_FLAGS_VLAN_TAG_LOC_L2TAG2);
1459 rx_ring->flags &=
1460 ~(IAVF_TXRX_FLAGS_VLAN_TAG_LOC_L2TAG1 |
1461 IAVF_RXR_FLAGS_VLAN_TAG_LOC_L2TAG2_2);
1462
1463 if (VLAN_ALLOWED(adapter)) {
1464 tx_ring->flags |= IAVF_TXRX_FLAGS_VLAN_TAG_LOC_L2TAG1;
1465 rx_ring->flags |= IAVF_TXRX_FLAGS_VLAN_TAG_LOC_L2TAG1;
1466 } else if (VLAN_V2_ALLOWED(adapter)) {
1467 struct virtchnl_vlan_supported_caps *stripping_support;
1468 struct virtchnl_vlan_supported_caps *insertion_support;
1469
1470 stripping_support =
1471 &adapter->vlan_v2_caps.offloads.stripping_support;
1472 insertion_support =
1473 &adapter->vlan_v2_caps.offloads.insertion_support;
1474
1475 if (stripping_support->outer) {
1476 if (stripping_support->outer &
1477 VIRTCHNL_VLAN_TAG_LOCATION_L2TAG1)
1478 rx_ring->flags |=
1479 IAVF_TXRX_FLAGS_VLAN_TAG_LOC_L2TAG1;
1480 else if (stripping_support->outer &
1481 VIRTCHNL_VLAN_TAG_LOCATION_L2TAG2_2)
1482 rx_ring->flags |=
1483 IAVF_RXR_FLAGS_VLAN_TAG_LOC_L2TAG2_2;
1484 } else if (stripping_support->inner) {
1485 if (stripping_support->inner &
1486 VIRTCHNL_VLAN_TAG_LOCATION_L2TAG1)
1487 rx_ring->flags |=
1488 IAVF_TXRX_FLAGS_VLAN_TAG_LOC_L2TAG1;
1489 else if (stripping_support->inner &
1490 VIRTCHNL_VLAN_TAG_LOCATION_L2TAG2_2)
1491 rx_ring->flags |=
1492 IAVF_RXR_FLAGS_VLAN_TAG_LOC_L2TAG2_2;
1493 }
1494
1495 if (insertion_support->outer) {
1496 if (insertion_support->outer &
1497 VIRTCHNL_VLAN_TAG_LOCATION_L2TAG1)
1498 tx_ring->flags |=
1499 IAVF_TXRX_FLAGS_VLAN_TAG_LOC_L2TAG1;
1500 else if (insertion_support->outer &
1501 VIRTCHNL_VLAN_TAG_LOCATION_L2TAG2)
1502 tx_ring->flags |=
1503 IAVF_TXR_FLAGS_VLAN_TAG_LOC_L2TAG2;
1504 } else if (insertion_support->inner) {
1505 if (insertion_support->inner &
1506 VIRTCHNL_VLAN_TAG_LOCATION_L2TAG1)
1507 tx_ring->flags |=
1508 IAVF_TXRX_FLAGS_VLAN_TAG_LOC_L2TAG1;
1509 else if (insertion_support->inner &
1510 VIRTCHNL_VLAN_TAG_LOCATION_L2TAG2)
1511 tx_ring->flags |=
1512 IAVF_TXR_FLAGS_VLAN_TAG_LOC_L2TAG2;
1513 }
1514 }
1515 }
1516 }
1517
1518 /**
1519 * iavf_alloc_queues - Allocate memory for all rings
1520 * @adapter: board private structure to initialize
1521 *
1522 * We allocate one ring per queue at run-time since we don't know the
1523 * number of queues at compile-time. The polling_netdev array is
1524 * intended for Multiqueue, but should work fine with a single queue.
1525 **/
iavf_alloc_queues(struct iavf_adapter * adapter)1526 static int iavf_alloc_queues(struct iavf_adapter *adapter)
1527 {
1528 int i, num_active_queues;
1529
1530 /* If we're in reset reallocating queues we don't actually know yet for
1531 * certain the PF gave us the number of queues we asked for but we'll
1532 * assume it did. Once basic reset is finished we'll confirm once we
1533 * start negotiating config with PF.
1534 */
1535 if (adapter->num_req_queues)
1536 num_active_queues = adapter->num_req_queues;
1537 else if ((adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) &&
1538 adapter->num_tc)
1539 num_active_queues = adapter->ch_config.total_qps;
1540 else
1541 num_active_queues = min_t(int,
1542 adapter->vsi_res->num_queue_pairs,
1543 (int)(num_online_cpus()));
1544
1545
1546 adapter->tx_rings = kzalloc_objs(struct iavf_ring, num_active_queues);
1547 if (!adapter->tx_rings)
1548 goto err_out;
1549 adapter->rx_rings = kzalloc_objs(struct iavf_ring, num_active_queues);
1550 if (!adapter->rx_rings)
1551 goto err_out;
1552
1553 for (i = 0; i < num_active_queues; i++) {
1554 struct iavf_ring *tx_ring;
1555 struct iavf_ring *rx_ring;
1556
1557 tx_ring = &adapter->tx_rings[i];
1558
1559 tx_ring->queue_index = i;
1560 tx_ring->netdev = adapter->netdev;
1561 tx_ring->dev = &adapter->pdev->dev;
1562 tx_ring->count = adapter->tx_desc_count;
1563 tx_ring->itr_setting = IAVF_ITR_TX_DEF;
1564 if (adapter->flags & IAVF_FLAG_WB_ON_ITR_CAPABLE)
1565 tx_ring->flags |= IAVF_TXR_FLAGS_WB_ON_ITR;
1566
1567 rx_ring = &adapter->rx_rings[i];
1568 rx_ring->queue_index = i;
1569 rx_ring->netdev = adapter->netdev;
1570 rx_ring->count = adapter->rx_desc_count;
1571 rx_ring->itr_setting = IAVF_ITR_RX_DEF;
1572 }
1573
1574 adapter->num_active_queues = num_active_queues;
1575
1576 iavf_set_queue_vlan_tag_loc(adapter);
1577
1578 return 0;
1579
1580 err_out:
1581 iavf_free_queues(adapter);
1582 return -ENOMEM;
1583 }
1584
1585 /**
1586 * iavf_set_interrupt_capability - set MSI-X or FAIL if not supported
1587 * @adapter: board private structure to initialize
1588 *
1589 * Attempt to configure the interrupts using the best available
1590 * capabilities of the hardware and the kernel.
1591 **/
iavf_set_interrupt_capability(struct iavf_adapter * adapter)1592 static int iavf_set_interrupt_capability(struct iavf_adapter *adapter)
1593 {
1594 int vector, v_budget;
1595 int pairs = 0;
1596 int err = 0;
1597
1598 if (!adapter->vsi_res) {
1599 err = -EIO;
1600 goto out;
1601 }
1602 pairs = adapter->num_active_queues;
1603
1604 /* It's easy to be greedy for MSI-X vectors, but it really doesn't do
1605 * us much good if we have more vectors than CPUs. However, we already
1606 * limit the total number of queues by the number of CPUs so we do not
1607 * need any further limiting here.
1608 */
1609 v_budget = min_t(int, pairs + NONQ_VECS,
1610 (int)adapter->vf_res->max_vectors);
1611
1612 adapter->msix_entries = kzalloc_objs(struct msix_entry, v_budget);
1613 if (!adapter->msix_entries) {
1614 err = -ENOMEM;
1615 goto out;
1616 }
1617
1618 for (vector = 0; vector < v_budget; vector++)
1619 adapter->msix_entries[vector].entry = vector;
1620
1621 err = iavf_acquire_msix_vectors(adapter, v_budget);
1622 if (!err)
1623 iavf_schedule_finish_config(adapter);
1624
1625 out:
1626 return err;
1627 }
1628
1629 /**
1630 * iavf_config_rss_aq - Configure RSS keys and lut by using AQ commands
1631 * @adapter: board private structure
1632 *
1633 * Return 0 on success, negative on failure
1634 **/
iavf_config_rss_aq(struct iavf_adapter * adapter)1635 static int iavf_config_rss_aq(struct iavf_adapter *adapter)
1636 {
1637 struct iavf_aqc_get_set_rss_key_data *rss_key =
1638 (struct iavf_aqc_get_set_rss_key_data *)adapter->rss_key;
1639 struct iavf_hw *hw = &adapter->hw;
1640 enum iavf_status status;
1641
1642 if (adapter->current_op != VIRTCHNL_OP_UNKNOWN) {
1643 /* bail because we already have a command pending */
1644 dev_err(&adapter->pdev->dev, "Cannot configure RSS, command %d pending\n",
1645 adapter->current_op);
1646 return -EBUSY;
1647 }
1648
1649 status = iavf_aq_set_rss_key(hw, adapter->vsi.id, rss_key);
1650 if (status) {
1651 dev_err(&adapter->pdev->dev, "Cannot set RSS key, err %s aq_err %s\n",
1652 iavf_stat_str(hw, status),
1653 libie_aq_str(hw->aq.asq_last_status));
1654 return iavf_status_to_errno(status);
1655
1656 }
1657
1658 status = iavf_aq_set_rss_lut(hw, adapter->vsi.id, false,
1659 adapter->rss_lut, adapter->rss_lut_size);
1660 if (status) {
1661 dev_err(&adapter->pdev->dev, "Cannot set RSS lut, err %s aq_err %s\n",
1662 iavf_stat_str(hw, status),
1663 libie_aq_str(hw->aq.asq_last_status));
1664 return iavf_status_to_errno(status);
1665 }
1666
1667 return 0;
1668
1669 }
1670
1671 /**
1672 * iavf_config_rss_reg - Configure RSS keys and lut by writing registers
1673 * @adapter: board private structure
1674 *
1675 * Returns 0 on success, negative on failure
1676 **/
iavf_config_rss_reg(struct iavf_adapter * adapter)1677 static int iavf_config_rss_reg(struct iavf_adapter *adapter)
1678 {
1679 struct iavf_hw *hw = &adapter->hw;
1680 u32 *dw;
1681 u16 i;
1682
1683 dw = (u32 *)adapter->rss_key;
1684 for (i = 0; i < adapter->rss_key_size / 4; i++)
1685 wr32(hw, IAVF_VFQF_HKEY(i), dw[i]);
1686
1687 dw = (u32 *)adapter->rss_lut;
1688 for (i = 0; i < adapter->rss_lut_size / 4; i++)
1689 wr32(hw, IAVF_VFQF_HLUT(i), dw[i]);
1690
1691 iavf_flush(hw);
1692
1693 return 0;
1694 }
1695
1696 /**
1697 * iavf_config_rss - Configure RSS keys and lut
1698 * @adapter: board private structure
1699 *
1700 * Returns 0 on success, negative on failure
1701 **/
iavf_config_rss(struct iavf_adapter * adapter)1702 int iavf_config_rss(struct iavf_adapter *adapter)
1703 {
1704
1705 if (RSS_PF(adapter)) {
1706 adapter->aq_required |= IAVF_FLAG_AQ_SET_RSS_LUT |
1707 IAVF_FLAG_AQ_SET_RSS_KEY;
1708 return 0;
1709 } else if (RSS_AQ(adapter)) {
1710 return iavf_config_rss_aq(adapter);
1711 } else {
1712 return iavf_config_rss_reg(adapter);
1713 }
1714 }
1715
1716 /**
1717 * iavf_fill_rss_lut - Fill the lut with default values
1718 * @adapter: board private structure
1719 **/
iavf_fill_rss_lut(struct iavf_adapter * adapter)1720 static void iavf_fill_rss_lut(struct iavf_adapter *adapter)
1721 {
1722 u16 i;
1723
1724 for (i = 0; i < adapter->rss_lut_size; i++)
1725 adapter->rss_lut[i] = i % adapter->num_active_queues;
1726 }
1727
1728 /**
1729 * iavf_init_rss - Prepare for RSS
1730 * @adapter: board private structure
1731 *
1732 * Return 0 on success, negative on failure
1733 **/
iavf_init_rss(struct iavf_adapter * adapter)1734 static int iavf_init_rss(struct iavf_adapter *adapter)
1735 {
1736 struct iavf_hw *hw = &adapter->hw;
1737
1738 if (!RSS_PF(adapter)) {
1739 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1740 if (adapter->vf_res->vf_cap_flags &
1741 VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2)
1742 adapter->rss_hashcfg =
1743 IAVF_DEFAULT_RSS_HASHCFG_EXPANDED;
1744 else
1745 adapter->rss_hashcfg = IAVF_DEFAULT_RSS_HASHCFG;
1746
1747 wr32(hw, IAVF_VFQF_HENA(0), (u32)adapter->rss_hashcfg);
1748 wr32(hw, IAVF_VFQF_HENA(1), (u32)(adapter->rss_hashcfg >> 32));
1749 }
1750
1751 iavf_fill_rss_lut(adapter);
1752 netdev_rss_key_fill((void *)adapter->rss_key, adapter->rss_key_size);
1753
1754 return iavf_config_rss(adapter);
1755 }
1756
1757 /**
1758 * iavf_alloc_q_vectors - Allocate memory for interrupt vectors
1759 * @adapter: board private structure to initialize
1760 *
1761 * We allocate one q_vector per queue interrupt. If allocation fails we
1762 * return -ENOMEM.
1763 **/
iavf_alloc_q_vectors(struct iavf_adapter * adapter)1764 static int iavf_alloc_q_vectors(struct iavf_adapter *adapter)
1765 {
1766 int q_idx = 0, num_q_vectors, irq_num;
1767 struct iavf_q_vector *q_vector;
1768
1769 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1770 adapter->q_vectors = kzalloc_objs(*q_vector, num_q_vectors);
1771 if (!adapter->q_vectors)
1772 return -ENOMEM;
1773
1774 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1775 irq_num = adapter->msix_entries[q_idx + NONQ_VECS].vector;
1776 q_vector = &adapter->q_vectors[q_idx];
1777 q_vector->adapter = adapter;
1778 q_vector->vsi = &adapter->vsi;
1779 q_vector->v_idx = q_idx;
1780 q_vector->reg_idx = q_idx;
1781 netif_napi_add_config_locked(adapter->netdev, &q_vector->napi,
1782 iavf_napi_poll, q_idx);
1783 netif_napi_set_irq_locked(&q_vector->napi, irq_num);
1784 }
1785
1786 return 0;
1787 }
1788
1789 /**
1790 * iavf_free_q_vectors - Free memory allocated for interrupt vectors
1791 * @adapter: board private structure to initialize
1792 *
1793 * This function frees the memory allocated to the q_vectors. In addition if
1794 * NAPI is enabled it will delete any references to the NAPI struct prior
1795 * to freeing the q_vector.
1796 **/
iavf_free_q_vectors(struct iavf_adapter * adapter)1797 static void iavf_free_q_vectors(struct iavf_adapter *adapter)
1798 {
1799 int q_idx, num_q_vectors;
1800
1801 if (!adapter->q_vectors)
1802 return;
1803
1804 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1805
1806 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1807 struct iavf_q_vector *q_vector = &adapter->q_vectors[q_idx];
1808
1809 netif_napi_del_locked(&q_vector->napi);
1810 }
1811 kfree(adapter->q_vectors);
1812 adapter->q_vectors = NULL;
1813 }
1814
1815 /**
1816 * iavf_reset_interrupt_capability - Reset MSIX setup
1817 * @adapter: board private structure
1818 *
1819 **/
iavf_reset_interrupt_capability(struct iavf_adapter * adapter)1820 static void iavf_reset_interrupt_capability(struct iavf_adapter *adapter)
1821 {
1822 if (!adapter->msix_entries)
1823 return;
1824
1825 pci_disable_msix(adapter->pdev);
1826 kfree(adapter->msix_entries);
1827 adapter->msix_entries = NULL;
1828 }
1829
1830 /**
1831 * iavf_init_interrupt_scheme - Determine if MSIX is supported and init
1832 * @adapter: board private structure to initialize
1833 *
1834 **/
iavf_init_interrupt_scheme(struct iavf_adapter * adapter)1835 static int iavf_init_interrupt_scheme(struct iavf_adapter *adapter)
1836 {
1837 int err;
1838
1839 err = iavf_alloc_queues(adapter);
1840 if (err) {
1841 dev_err(&adapter->pdev->dev,
1842 "Unable to allocate memory for queues\n");
1843 goto err_alloc_queues;
1844 }
1845
1846 err = iavf_set_interrupt_capability(adapter);
1847 if (err) {
1848 dev_err(&adapter->pdev->dev,
1849 "Unable to setup interrupt capabilities\n");
1850 goto err_set_interrupt;
1851 }
1852
1853 err = iavf_alloc_q_vectors(adapter);
1854 if (err) {
1855 dev_err(&adapter->pdev->dev,
1856 "Unable to allocate memory for queue vectors\n");
1857 goto err_alloc_q_vectors;
1858 }
1859
1860 /* If we've made it so far while ADq flag being ON, then we haven't
1861 * bailed out anywhere in middle. And ADq isn't just enabled but actual
1862 * resources have been allocated in the reset path.
1863 * Now we can truly claim that ADq is enabled.
1864 */
1865 if ((adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) &&
1866 adapter->num_tc)
1867 dev_info(&adapter->pdev->dev, "ADq Enabled, %u TCs created",
1868 adapter->num_tc);
1869
1870 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1871 (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1872 adapter->num_active_queues);
1873
1874 return 0;
1875 err_alloc_q_vectors:
1876 iavf_reset_interrupt_capability(adapter);
1877 err_set_interrupt:
1878 iavf_free_queues(adapter);
1879 err_alloc_queues:
1880 return err;
1881 }
1882
1883 /**
1884 * iavf_free_interrupt_scheme - Undo what iavf_init_interrupt_scheme does
1885 * @adapter: board private structure
1886 **/
iavf_free_interrupt_scheme(struct iavf_adapter * adapter)1887 static void iavf_free_interrupt_scheme(struct iavf_adapter *adapter)
1888 {
1889 iavf_free_q_vectors(adapter);
1890 iavf_reset_interrupt_capability(adapter);
1891 iavf_free_queues(adapter);
1892 }
1893
1894 /**
1895 * iavf_free_rss - Free memory used by RSS structs
1896 * @adapter: board private structure
1897 **/
iavf_free_rss(struct iavf_adapter * adapter)1898 static void iavf_free_rss(struct iavf_adapter *adapter)
1899 {
1900 kfree(adapter->rss_key);
1901 adapter->rss_key = NULL;
1902
1903 kfree(adapter->rss_lut);
1904 adapter->rss_lut = NULL;
1905 }
1906
1907 /**
1908 * iavf_reinit_interrupt_scheme - Reallocate queues and vectors
1909 * @adapter: board private structure
1910 * @running: true if adapter->state == __IAVF_RUNNING
1911 *
1912 * Returns 0 on success, negative on failure
1913 **/
iavf_reinit_interrupt_scheme(struct iavf_adapter * adapter,bool running)1914 static int iavf_reinit_interrupt_scheme(struct iavf_adapter *adapter, bool running)
1915 {
1916 struct net_device *netdev = adapter->netdev;
1917 int err;
1918
1919 if (running)
1920 iavf_free_traffic_irqs(adapter);
1921 iavf_free_misc_irq(adapter);
1922 iavf_free_interrupt_scheme(adapter);
1923
1924 err = iavf_init_interrupt_scheme(adapter);
1925 if (err)
1926 goto err;
1927
1928 netif_tx_stop_all_queues(netdev);
1929
1930 err = iavf_request_misc_irq(adapter);
1931 if (err)
1932 goto err;
1933
1934 set_bit(__IAVF_VSI_DOWN, adapter->vsi.state);
1935
1936 iavf_map_rings_to_vectors(adapter);
1937 err:
1938 return err;
1939 }
1940
1941 /**
1942 * iavf_finish_config - do all netdev work that needs RTNL
1943 * @work: our work_struct
1944 *
1945 * Do work that needs RTNL.
1946 */
iavf_finish_config(struct work_struct * work)1947 static void iavf_finish_config(struct work_struct *work)
1948 {
1949 struct iavf_adapter *adapter;
1950 bool netdev_released = false;
1951 int pairs, err;
1952
1953 adapter = container_of(work, struct iavf_adapter, finish_config);
1954
1955 /* Always take RTNL first to prevent circular lock dependency;
1956 * the dev->lock (== netdev lock) is needed to update the queue number.
1957 */
1958 rtnl_lock();
1959 netdev_lock(adapter->netdev);
1960
1961 if ((adapter->flags & IAVF_FLAG_SETUP_NETDEV_FEATURES) &&
1962 adapter->netdev->reg_state == NETREG_REGISTERED &&
1963 !test_bit(__IAVF_IN_REMOVE_TASK, &adapter->crit_section)) {
1964 netdev_update_features(adapter->netdev);
1965 adapter->flags &= ~IAVF_FLAG_SETUP_NETDEV_FEATURES;
1966 }
1967
1968 switch (adapter->state) {
1969 case __IAVF_DOWN:
1970 /* Set the real number of queues when reset occurs while
1971 * state == __IAVF_DOWN
1972 */
1973 pairs = adapter->num_active_queues;
1974 netif_set_real_num_rx_queues(adapter->netdev, pairs);
1975 netif_set_real_num_tx_queues(adapter->netdev, pairs);
1976
1977 if (adapter->netdev->reg_state != NETREG_REGISTERED) {
1978 netdev_unlock(adapter->netdev);
1979 netdev_released = true;
1980 err = register_netdevice(adapter->netdev);
1981 if (err) {
1982 dev_err(&adapter->pdev->dev, "Unable to register netdev (%d)\n",
1983 err);
1984
1985 /* go back and try again.*/
1986 netdev_lock(adapter->netdev);
1987 iavf_free_rss(adapter);
1988 iavf_free_misc_irq(adapter);
1989 iavf_reset_interrupt_capability(adapter);
1990 iavf_change_state(adapter,
1991 __IAVF_INIT_CONFIG_ADAPTER);
1992 netdev_unlock(adapter->netdev);
1993 goto out;
1994 }
1995 }
1996 break;
1997 case __IAVF_RUNNING:
1998 pairs = adapter->num_active_queues;
1999 netif_set_real_num_rx_queues(adapter->netdev, pairs);
2000 netif_set_real_num_tx_queues(adapter->netdev, pairs);
2001 break;
2002
2003 default:
2004 break;
2005 }
2006
2007 out:
2008 if (!netdev_released)
2009 netdev_unlock(adapter->netdev);
2010 rtnl_unlock();
2011 }
2012
2013 /**
2014 * iavf_schedule_finish_config - Set the flags and schedule a reset event
2015 * @adapter: board private structure
2016 **/
iavf_schedule_finish_config(struct iavf_adapter * adapter)2017 void iavf_schedule_finish_config(struct iavf_adapter *adapter)
2018 {
2019 if (!test_bit(__IAVF_IN_REMOVE_TASK, &adapter->crit_section))
2020 queue_work(adapter->wq, &adapter->finish_config);
2021 }
2022
2023 /**
2024 * iavf_process_aq_command - process aq_required flags
2025 * and sends aq command
2026 * @adapter: pointer to iavf adapter structure
2027 *
2028 * Returns 0 on success
2029 * Returns error code if no command was sent
2030 * or error code if the command failed.
2031 **/
iavf_process_aq_command(struct iavf_adapter * adapter)2032 static int iavf_process_aq_command(struct iavf_adapter *adapter)
2033 {
2034 if (adapter->aq_required & IAVF_FLAG_AQ_GET_CONFIG)
2035 return iavf_send_vf_config_msg(adapter);
2036 if (adapter->aq_required & IAVF_FLAG_AQ_GET_OFFLOAD_VLAN_V2_CAPS)
2037 return iavf_send_vf_offload_vlan_v2_msg(adapter);
2038 if (adapter->aq_required & IAVF_FLAG_AQ_GET_SUPPORTED_RXDIDS)
2039 return iavf_send_vf_supported_rxdids_msg(adapter);
2040 if (adapter->aq_required & IAVF_FLAG_AQ_GET_PTP_CAPS)
2041 return iavf_send_vf_ptp_caps_msg(adapter);
2042 if (adapter->aq_required & IAVF_FLAG_AQ_DISABLE_QUEUES) {
2043 iavf_disable_queues(adapter);
2044 return 0;
2045 }
2046
2047 if (adapter->aq_required & IAVF_FLAG_AQ_MAP_VECTORS) {
2048 iavf_map_queues(adapter);
2049 return 0;
2050 }
2051
2052 if (adapter->aq_required & IAVF_FLAG_AQ_ADD_MAC_FILTER) {
2053 iavf_add_ether_addrs(adapter);
2054 return 0;
2055 }
2056
2057 if (adapter->aq_required & IAVF_FLAG_AQ_ADD_VLAN_FILTER) {
2058 iavf_add_vlans(adapter);
2059 return 0;
2060 }
2061
2062 if (adapter->aq_required & IAVF_FLAG_AQ_DEL_MAC_FILTER) {
2063 iavf_del_ether_addrs(adapter);
2064 return 0;
2065 }
2066
2067 if (adapter->aq_required & IAVF_FLAG_AQ_DEL_VLAN_FILTER) {
2068 iavf_del_vlans(adapter);
2069 return 0;
2070 }
2071
2072 if (adapter->aq_required & IAVF_FLAG_AQ_ENABLE_VLAN_STRIPPING) {
2073 iavf_enable_vlan_stripping(adapter);
2074 return 0;
2075 }
2076
2077 if (adapter->aq_required & IAVF_FLAG_AQ_DISABLE_VLAN_STRIPPING) {
2078 iavf_disable_vlan_stripping(adapter);
2079 return 0;
2080 }
2081
2082 if (adapter->aq_required & IAVF_FLAG_AQ_CONFIGURE_QUEUES_BW) {
2083 iavf_cfg_queues_bw(adapter);
2084 return 0;
2085 }
2086
2087 if (adapter->aq_required & IAVF_FLAG_AQ_GET_QOS_CAPS) {
2088 iavf_get_qos_caps(adapter);
2089 return 0;
2090 }
2091
2092 if (adapter->aq_required & IAVF_FLAG_AQ_CFG_QUEUES_QUANTA_SIZE) {
2093 iavf_cfg_queues_quanta_size(adapter);
2094 return 0;
2095 }
2096
2097 if (adapter->aq_required & IAVF_FLAG_AQ_CONFIGURE_QUEUES) {
2098 iavf_configure_queues(adapter);
2099 return 0;
2100 }
2101
2102 if (adapter->aq_required & IAVF_FLAG_AQ_ENABLE_QUEUES) {
2103 iavf_enable_queues(adapter);
2104 return 0;
2105 }
2106
2107 if (adapter->aq_required & IAVF_FLAG_AQ_CONFIGURE_RSS) {
2108 /* This message goes straight to the firmware, not the
2109 * PF, so we don't have to set current_op as we will
2110 * not get a response through the ARQ.
2111 */
2112 adapter->aq_required &= ~IAVF_FLAG_AQ_CONFIGURE_RSS;
2113 return 0;
2114 }
2115 if (adapter->aq_required & IAVF_FLAG_AQ_GET_RSS_HASHCFG) {
2116 iavf_get_rss_hashcfg(adapter);
2117 return 0;
2118 }
2119 if (adapter->aq_required & IAVF_FLAG_AQ_SET_RSS_HASHCFG) {
2120 iavf_set_rss_hashcfg(adapter);
2121 return 0;
2122 }
2123 if (adapter->aq_required & IAVF_FLAG_AQ_SET_RSS_KEY) {
2124 iavf_set_rss_key(adapter);
2125 return 0;
2126 }
2127 if (adapter->aq_required & IAVF_FLAG_AQ_SET_RSS_LUT) {
2128 iavf_set_rss_lut(adapter);
2129 return 0;
2130 }
2131 if (adapter->aq_required & IAVF_FLAG_AQ_SET_RSS_HFUNC) {
2132 iavf_set_rss_hfunc(adapter);
2133 return 0;
2134 }
2135
2136 if (adapter->aq_required & IAVF_FLAG_AQ_CONFIGURE_PROMISC_MODE) {
2137 iavf_set_promiscuous(adapter);
2138 return 0;
2139 }
2140
2141 if (adapter->aq_required & IAVF_FLAG_AQ_ENABLE_CHANNELS) {
2142 iavf_enable_channels(adapter);
2143 return 0;
2144 }
2145
2146 if (adapter->aq_required & IAVF_FLAG_AQ_DISABLE_CHANNELS) {
2147 iavf_disable_channels(adapter);
2148 return 0;
2149 }
2150 if (adapter->aq_required & IAVF_FLAG_AQ_ADD_CLOUD_FILTER) {
2151 iavf_add_cloud_filter(adapter);
2152 return 0;
2153 }
2154 if (adapter->aq_required & IAVF_FLAG_AQ_DEL_CLOUD_FILTER) {
2155 iavf_del_cloud_filter(adapter);
2156 return 0;
2157 }
2158 if (adapter->aq_required & IAVF_FLAG_AQ_ADD_FDIR_FILTER) {
2159 iavf_add_fdir_filter(adapter);
2160 return IAVF_SUCCESS;
2161 }
2162 if (adapter->aq_required & IAVF_FLAG_AQ_DEL_FDIR_FILTER) {
2163 iavf_del_fdir_filter(adapter);
2164 return IAVF_SUCCESS;
2165 }
2166 if (adapter->aq_required & IAVF_FLAG_AQ_ADD_ADV_RSS_CFG) {
2167 iavf_add_adv_rss_cfg(adapter);
2168 return 0;
2169 }
2170 if (adapter->aq_required & IAVF_FLAG_AQ_DEL_ADV_RSS_CFG) {
2171 iavf_del_adv_rss_cfg(adapter);
2172 return 0;
2173 }
2174 if (adapter->aq_required & IAVF_FLAG_AQ_DISABLE_CTAG_VLAN_STRIPPING) {
2175 iavf_disable_vlan_stripping_v2(adapter, ETH_P_8021Q);
2176 return 0;
2177 }
2178 if (adapter->aq_required & IAVF_FLAG_AQ_DISABLE_STAG_VLAN_STRIPPING) {
2179 iavf_disable_vlan_stripping_v2(adapter, ETH_P_8021AD);
2180 return 0;
2181 }
2182 if (adapter->aq_required & IAVF_FLAG_AQ_ENABLE_CTAG_VLAN_STRIPPING) {
2183 iavf_enable_vlan_stripping_v2(adapter, ETH_P_8021Q);
2184 return 0;
2185 }
2186 if (adapter->aq_required & IAVF_FLAG_AQ_ENABLE_STAG_VLAN_STRIPPING) {
2187 iavf_enable_vlan_stripping_v2(adapter, ETH_P_8021AD);
2188 return 0;
2189 }
2190 if (adapter->aq_required & IAVF_FLAG_AQ_DISABLE_CTAG_VLAN_INSERTION) {
2191 iavf_disable_vlan_insertion_v2(adapter, ETH_P_8021Q);
2192 return 0;
2193 }
2194 if (adapter->aq_required & IAVF_FLAG_AQ_DISABLE_STAG_VLAN_INSERTION) {
2195 iavf_disable_vlan_insertion_v2(adapter, ETH_P_8021AD);
2196 return 0;
2197 }
2198 if (adapter->aq_required & IAVF_FLAG_AQ_ENABLE_CTAG_VLAN_INSERTION) {
2199 iavf_enable_vlan_insertion_v2(adapter, ETH_P_8021Q);
2200 return 0;
2201 }
2202 if (adapter->aq_required & IAVF_FLAG_AQ_ENABLE_STAG_VLAN_INSERTION) {
2203 iavf_enable_vlan_insertion_v2(adapter, ETH_P_8021AD);
2204 return 0;
2205 }
2206 if (adapter->aq_required & IAVF_FLAG_AQ_SEND_PTP_CMD) {
2207 iavf_virtchnl_send_ptp_cmd(adapter);
2208 return IAVF_SUCCESS;
2209 }
2210 if (adapter->aq_required & IAVF_FLAG_AQ_REQUEST_STATS) {
2211 iavf_request_stats(adapter);
2212 return 0;
2213 }
2214
2215 return -EAGAIN;
2216 }
2217
2218 /**
2219 * iavf_set_vlan_offload_features - set VLAN offload configuration
2220 * @adapter: board private structure
2221 * @prev_features: previous features used for comparison
2222 * @features: updated features used for configuration
2223 *
2224 * Set the aq_required bit(s) based on the requested features passed in to
2225 * configure VLAN stripping and/or VLAN insertion if supported. Also, schedule
2226 * the watchdog if any changes are requested to expedite the request via
2227 * virtchnl.
2228 **/
2229 static void
iavf_set_vlan_offload_features(struct iavf_adapter * adapter,netdev_features_t prev_features,netdev_features_t features)2230 iavf_set_vlan_offload_features(struct iavf_adapter *adapter,
2231 netdev_features_t prev_features,
2232 netdev_features_t features)
2233 {
2234 bool enable_stripping = true, enable_insertion = true;
2235 u16 vlan_ethertype = 0;
2236 u64 aq_required = 0;
2237
2238 /* keep cases separate because one ethertype for offloads can be
2239 * disabled at the same time as another is disabled, so check for an
2240 * enabled ethertype first, then check for disabled. Default to
2241 * ETH_P_8021Q so an ethertype is specified if disabling insertion and
2242 * stripping.
2243 */
2244 if (features & (NETIF_F_HW_VLAN_STAG_RX | NETIF_F_HW_VLAN_STAG_TX))
2245 vlan_ethertype = ETH_P_8021AD;
2246 else if (features & (NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_TX))
2247 vlan_ethertype = ETH_P_8021Q;
2248 else if (prev_features & (NETIF_F_HW_VLAN_STAG_RX | NETIF_F_HW_VLAN_STAG_TX))
2249 vlan_ethertype = ETH_P_8021AD;
2250 else if (prev_features & (NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_TX))
2251 vlan_ethertype = ETH_P_8021Q;
2252 else
2253 vlan_ethertype = ETH_P_8021Q;
2254
2255 if (!(features & (NETIF_F_HW_VLAN_STAG_RX | NETIF_F_HW_VLAN_CTAG_RX)))
2256 enable_stripping = false;
2257 if (!(features & (NETIF_F_HW_VLAN_STAG_TX | NETIF_F_HW_VLAN_CTAG_TX)))
2258 enable_insertion = false;
2259
2260 if (VLAN_ALLOWED(adapter)) {
2261 /* VIRTCHNL_VF_OFFLOAD_VLAN only has support for toggling VLAN
2262 * stripping via virtchnl. VLAN insertion can be toggled on the
2263 * netdev, but it doesn't require a virtchnl message
2264 */
2265 if (enable_stripping)
2266 aq_required |= IAVF_FLAG_AQ_ENABLE_VLAN_STRIPPING;
2267 else
2268 aq_required |= IAVF_FLAG_AQ_DISABLE_VLAN_STRIPPING;
2269
2270 } else if (VLAN_V2_ALLOWED(adapter)) {
2271 switch (vlan_ethertype) {
2272 case ETH_P_8021Q:
2273 if (enable_stripping)
2274 aq_required |= IAVF_FLAG_AQ_ENABLE_CTAG_VLAN_STRIPPING;
2275 else
2276 aq_required |= IAVF_FLAG_AQ_DISABLE_CTAG_VLAN_STRIPPING;
2277
2278 if (enable_insertion)
2279 aq_required |= IAVF_FLAG_AQ_ENABLE_CTAG_VLAN_INSERTION;
2280 else
2281 aq_required |= IAVF_FLAG_AQ_DISABLE_CTAG_VLAN_INSERTION;
2282 break;
2283 case ETH_P_8021AD:
2284 if (enable_stripping)
2285 aq_required |= IAVF_FLAG_AQ_ENABLE_STAG_VLAN_STRIPPING;
2286 else
2287 aq_required |= IAVF_FLAG_AQ_DISABLE_STAG_VLAN_STRIPPING;
2288
2289 if (enable_insertion)
2290 aq_required |= IAVF_FLAG_AQ_ENABLE_STAG_VLAN_INSERTION;
2291 else
2292 aq_required |= IAVF_FLAG_AQ_DISABLE_STAG_VLAN_INSERTION;
2293 break;
2294 }
2295 }
2296
2297 if (aq_required)
2298 iavf_schedule_aq_request(adapter, aq_required);
2299 }
2300
2301 /**
2302 * iavf_startup - first step of driver startup
2303 * @adapter: board private structure
2304 *
2305 * Function process __IAVF_STARTUP driver state.
2306 * When success the state is changed to __IAVF_INIT_VERSION_CHECK
2307 * when fails the state is changed to __IAVF_INIT_FAILED
2308 **/
iavf_startup(struct iavf_adapter * adapter)2309 static void iavf_startup(struct iavf_adapter *adapter)
2310 {
2311 struct pci_dev *pdev = adapter->pdev;
2312 struct iavf_hw *hw = &adapter->hw;
2313 enum iavf_status status;
2314 int ret;
2315
2316 WARN_ON(adapter->state != __IAVF_STARTUP);
2317
2318 /* driver loaded, probe complete */
2319 adapter->flags &= ~IAVF_FLAG_PF_COMMS_FAILED;
2320 adapter->flags &= ~IAVF_FLAG_RESET_PENDING;
2321
2322 ret = iavf_check_reset_complete(hw);
2323 if (ret) {
2324 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2325 ret);
2326 goto err;
2327 }
2328 hw->aq.num_arq_entries = IAVF_AQ_LEN;
2329 hw->aq.num_asq_entries = IAVF_AQ_LEN;
2330 hw->aq.arq_buf_size = IAVF_MAX_AQ_BUF_SIZE;
2331 hw->aq.asq_buf_size = IAVF_MAX_AQ_BUF_SIZE;
2332
2333 status = iavf_init_adminq(hw);
2334 if (status) {
2335 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2336 status);
2337 goto err;
2338 }
2339 ret = iavf_send_api_ver(adapter);
2340 if (ret) {
2341 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", ret);
2342 iavf_shutdown_adminq(hw);
2343 goto err;
2344 }
2345 iavf_change_state(adapter, __IAVF_INIT_VERSION_CHECK);
2346 return;
2347 err:
2348 iavf_change_state(adapter, __IAVF_INIT_FAILED);
2349 }
2350
2351 /**
2352 * iavf_init_version_check - second step of driver startup
2353 * @adapter: board private structure
2354 *
2355 * Function process __IAVF_INIT_VERSION_CHECK driver state.
2356 * When success the state is changed to __IAVF_INIT_GET_RESOURCES
2357 * when fails the state is changed to __IAVF_INIT_FAILED
2358 **/
iavf_init_version_check(struct iavf_adapter * adapter)2359 static void iavf_init_version_check(struct iavf_adapter *adapter)
2360 {
2361 struct pci_dev *pdev = adapter->pdev;
2362 struct iavf_hw *hw = &adapter->hw;
2363 int err = -EAGAIN;
2364
2365 WARN_ON(adapter->state != __IAVF_INIT_VERSION_CHECK);
2366
2367 if (!iavf_asq_done(hw)) {
2368 dev_err(&pdev->dev, "Admin queue command never completed\n");
2369 iavf_shutdown_adminq(hw);
2370 iavf_change_state(adapter, __IAVF_STARTUP);
2371 goto err;
2372 }
2373
2374 /* aq msg sent, awaiting reply */
2375 err = iavf_verify_api_ver(adapter);
2376 if (err) {
2377 if (err == -EALREADY)
2378 err = iavf_send_api_ver(adapter);
2379 else
2380 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
2381 adapter->pf_version.major,
2382 adapter->pf_version.minor,
2383 VIRTCHNL_VERSION_MAJOR,
2384 VIRTCHNL_VERSION_MINOR);
2385 goto err;
2386 }
2387 err = iavf_send_vf_config_msg(adapter);
2388 if (err) {
2389 dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2390 err);
2391 goto err;
2392 }
2393 iavf_change_state(adapter, __IAVF_INIT_GET_RESOURCES);
2394 return;
2395 err:
2396 iavf_change_state(adapter, __IAVF_INIT_FAILED);
2397 }
2398
2399 /**
2400 * iavf_parse_vf_resource_msg - parse response from VIRTCHNL_OP_GET_VF_RESOURCES
2401 * @adapter: board private structure
2402 */
iavf_parse_vf_resource_msg(struct iavf_adapter * adapter)2403 int iavf_parse_vf_resource_msg(struct iavf_adapter *adapter)
2404 {
2405 int i, num_req_queues = adapter->num_req_queues;
2406 struct iavf_vsi *vsi = &adapter->vsi;
2407
2408 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2409 if (adapter->vf_res->vsi_res[i].vsi_type == VIRTCHNL_VSI_SRIOV)
2410 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2411 }
2412 if (!adapter->vsi_res) {
2413 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
2414 return -ENODEV;
2415 }
2416
2417 if (num_req_queues &&
2418 num_req_queues > adapter->vsi_res->num_queue_pairs) {
2419 /* Problem. The PF gave us fewer queues than what we had
2420 * negotiated in our request. Need a reset to see if we can't
2421 * get back to a working state.
2422 */
2423 dev_err(&adapter->pdev->dev,
2424 "Requested %d queues, but PF only gave us %d.\n",
2425 num_req_queues,
2426 adapter->vsi_res->num_queue_pairs);
2427 adapter->flags |= IAVF_FLAG_REINIT_MSIX_NEEDED;
2428 adapter->num_req_queues = adapter->vsi_res->num_queue_pairs;
2429 iavf_schedule_reset(adapter, IAVF_FLAG_RESET_NEEDED);
2430
2431 return -EAGAIN;
2432 }
2433 adapter->num_req_queues = 0;
2434 adapter->vsi.id = adapter->vsi_res->vsi_id;
2435
2436 adapter->vsi.back = adapter;
2437 adapter->vsi.base_vector = 1;
2438 vsi->netdev = adapter->netdev;
2439 vsi->qs_handle = adapter->vsi_res->qset_handle;
2440 if (adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_RSS_PF) {
2441 adapter->rss_key_size = adapter->vf_res->rss_key_size;
2442 adapter->rss_lut_size = adapter->vf_res->rss_lut_size;
2443 } else {
2444 adapter->rss_key_size = IAVF_HKEY_ARRAY_SIZE;
2445 adapter->rss_lut_size = IAVF_HLUT_ARRAY_SIZE;
2446 }
2447
2448 return 0;
2449 }
2450
2451 /**
2452 * iavf_init_get_resources - third step of driver startup
2453 * @adapter: board private structure
2454 *
2455 * Function process __IAVF_INIT_GET_RESOURCES driver state and
2456 * finishes driver initialization procedure.
2457 * When success the state is changed to __IAVF_DOWN
2458 * when fails the state is changed to __IAVF_INIT_FAILED
2459 **/
iavf_init_get_resources(struct iavf_adapter * adapter)2460 static void iavf_init_get_resources(struct iavf_adapter *adapter)
2461 {
2462 struct pci_dev *pdev = adapter->pdev;
2463 struct iavf_hw *hw = &adapter->hw;
2464 int err;
2465
2466 WARN_ON(adapter->state != __IAVF_INIT_GET_RESOURCES);
2467 /* aq msg sent, awaiting reply */
2468 if (!adapter->vf_res) {
2469 adapter->vf_res = kzalloc(IAVF_VIRTCHNL_VF_RESOURCE_SIZE,
2470 GFP_KERNEL);
2471 if (!adapter->vf_res) {
2472 err = -ENOMEM;
2473 goto err;
2474 }
2475 }
2476 err = iavf_get_vf_config(adapter);
2477 if (err == -EALREADY) {
2478 err = iavf_send_vf_config_msg(adapter);
2479 goto err;
2480 } else if (err == -EINVAL) {
2481 /* We only get -EINVAL if the device is in a very bad
2482 * state or if we've been disabled for previous bad
2483 * behavior. Either way, we're done now.
2484 */
2485 iavf_shutdown_adminq(hw);
2486 dev_err(&pdev->dev, "Unable to get VF config due to PF error condition, not retrying\n");
2487 return;
2488 }
2489 if (err) {
2490 dev_err(&pdev->dev, "Unable to get VF config (%d)\n", err);
2491 goto err_alloc;
2492 }
2493
2494 err = iavf_parse_vf_resource_msg(adapter);
2495 if (err) {
2496 dev_err(&pdev->dev, "Failed to parse VF resource message from PF (%d)\n",
2497 err);
2498 goto err_alloc;
2499 }
2500 /* Some features require additional messages to negotiate extended
2501 * capabilities. These are processed in sequence by the
2502 * __IAVF_INIT_EXTENDED_CAPS driver state.
2503 */
2504 adapter->extended_caps = IAVF_EXTENDED_CAPS;
2505
2506 iavf_change_state(adapter, __IAVF_INIT_EXTENDED_CAPS);
2507 return;
2508
2509 err_alloc:
2510 kfree(adapter->vf_res);
2511 adapter->vf_res = NULL;
2512 err:
2513 iavf_change_state(adapter, __IAVF_INIT_FAILED);
2514 }
2515
2516 /**
2517 * iavf_init_send_offload_vlan_v2_caps - part of initializing VLAN V2 caps
2518 * @adapter: board private structure
2519 *
2520 * Function processes send of the extended VLAN V2 capability message to the
2521 * PF. Must clear IAVF_EXTENDED_CAP_RECV_VLAN_V2 if the message is not sent,
2522 * e.g. due to PF not negotiating VIRTCHNL_VF_OFFLOAD_VLAN_V2.
2523 */
iavf_init_send_offload_vlan_v2_caps(struct iavf_adapter * adapter)2524 static void iavf_init_send_offload_vlan_v2_caps(struct iavf_adapter *adapter)
2525 {
2526 int ret;
2527
2528 WARN_ON(!(adapter->extended_caps & IAVF_EXTENDED_CAP_SEND_VLAN_V2));
2529
2530 ret = iavf_send_vf_offload_vlan_v2_msg(adapter);
2531 if (ret && ret == -EOPNOTSUPP) {
2532 /* PF does not support VIRTCHNL_VF_OFFLOAD_V2. In this case,
2533 * we did not send the capability exchange message and do not
2534 * expect a response.
2535 */
2536 adapter->extended_caps &= ~IAVF_EXTENDED_CAP_RECV_VLAN_V2;
2537 }
2538
2539 /* We sent the message, so move on to the next step */
2540 adapter->extended_caps &= ~IAVF_EXTENDED_CAP_SEND_VLAN_V2;
2541 }
2542
2543 /**
2544 * iavf_init_recv_offload_vlan_v2_caps - part of initializing VLAN V2 caps
2545 * @adapter: board private structure
2546 *
2547 * Function processes receipt of the extended VLAN V2 capability message from
2548 * the PF.
2549 **/
iavf_init_recv_offload_vlan_v2_caps(struct iavf_adapter * adapter)2550 static void iavf_init_recv_offload_vlan_v2_caps(struct iavf_adapter *adapter)
2551 {
2552 int ret;
2553
2554 WARN_ON(!(adapter->extended_caps & IAVF_EXTENDED_CAP_RECV_VLAN_V2));
2555
2556 memset(&adapter->vlan_v2_caps, 0, sizeof(adapter->vlan_v2_caps));
2557
2558 ret = iavf_get_vf_vlan_v2_caps(adapter);
2559 if (ret)
2560 goto err;
2561
2562 /* We've processed receipt of the VLAN V2 caps message */
2563 adapter->extended_caps &= ~IAVF_EXTENDED_CAP_RECV_VLAN_V2;
2564 return;
2565 err:
2566 /* We didn't receive a reply. Make sure we try sending again when
2567 * __IAVF_INIT_FAILED attempts to recover.
2568 */
2569 adapter->extended_caps |= IAVF_EXTENDED_CAP_SEND_VLAN_V2;
2570 iavf_change_state(adapter, __IAVF_INIT_FAILED);
2571 }
2572
2573 /**
2574 * iavf_init_send_supported_rxdids - part of querying for supported RXDID
2575 * formats
2576 * @adapter: board private structure
2577 *
2578 * Function processes send of the request for supported RXDIDs to the PF.
2579 * Must clear IAVF_EXTENDED_CAP_RECV_RXDID if the message is not sent, e.g.
2580 * due to the PF not negotiating VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC.
2581 */
iavf_init_send_supported_rxdids(struct iavf_adapter * adapter)2582 static void iavf_init_send_supported_rxdids(struct iavf_adapter *adapter)
2583 {
2584 int ret;
2585
2586 ret = iavf_send_vf_supported_rxdids_msg(adapter);
2587 if (ret == -EOPNOTSUPP) {
2588 /* PF does not support VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC. In this
2589 * case, we did not send the capability exchange message and
2590 * do not expect a response.
2591 */
2592 adapter->extended_caps &= ~IAVF_EXTENDED_CAP_RECV_RXDID;
2593 }
2594
2595 /* We sent the message, so move on to the next step */
2596 adapter->extended_caps &= ~IAVF_EXTENDED_CAP_SEND_RXDID;
2597 }
2598
2599 /**
2600 * iavf_init_recv_supported_rxdids - part of querying for supported RXDID
2601 * formats
2602 * @adapter: board private structure
2603 *
2604 * Function processes receipt of the supported RXDIDs message from the PF.
2605 **/
iavf_init_recv_supported_rxdids(struct iavf_adapter * adapter)2606 static void iavf_init_recv_supported_rxdids(struct iavf_adapter *adapter)
2607 {
2608 int ret;
2609
2610 memset(&adapter->supp_rxdids, 0, sizeof(adapter->supp_rxdids));
2611
2612 ret = iavf_get_vf_supported_rxdids(adapter);
2613 if (ret)
2614 goto err;
2615
2616 /* We've processed the PF response to the
2617 * VIRTCHNL_OP_GET_SUPPORTED_RXDIDS message we sent previously.
2618 */
2619 adapter->extended_caps &= ~IAVF_EXTENDED_CAP_RECV_RXDID;
2620 return;
2621
2622 err:
2623 /* We didn't receive a reply. Make sure we try sending again when
2624 * __IAVF_INIT_FAILED attempts to recover.
2625 */
2626 adapter->extended_caps |= IAVF_EXTENDED_CAP_SEND_RXDID;
2627 iavf_change_state(adapter, __IAVF_INIT_FAILED);
2628 }
2629
2630 /**
2631 * iavf_init_send_ptp_caps - part of querying for extended PTP capabilities
2632 * @adapter: board private structure
2633 *
2634 * Function processes send of the request for 1588 PTP capabilities to the PF.
2635 * Must clear IAVF_EXTENDED_CAP_SEND_PTP if the message is not sent, e.g.
2636 * due to the PF not negotiating VIRTCHNL_VF_PTP_CAP
2637 */
iavf_init_send_ptp_caps(struct iavf_adapter * adapter)2638 static void iavf_init_send_ptp_caps(struct iavf_adapter *adapter)
2639 {
2640 if (iavf_send_vf_ptp_caps_msg(adapter) == -EOPNOTSUPP) {
2641 /* PF does not support VIRTCHNL_VF_PTP_CAP. In this case, we
2642 * did not send the capability exchange message and do not
2643 * expect a response.
2644 */
2645 adapter->extended_caps &= ~IAVF_EXTENDED_CAP_RECV_PTP;
2646 }
2647
2648 /* We sent the message, so move on to the next step */
2649 adapter->extended_caps &= ~IAVF_EXTENDED_CAP_SEND_PTP;
2650 }
2651
2652 /**
2653 * iavf_init_recv_ptp_caps - part of querying for supported PTP capabilities
2654 * @adapter: board private structure
2655 *
2656 * Function processes receipt of the PTP capabilities supported on this VF.
2657 **/
iavf_init_recv_ptp_caps(struct iavf_adapter * adapter)2658 static void iavf_init_recv_ptp_caps(struct iavf_adapter *adapter)
2659 {
2660 memset(&adapter->ptp.hw_caps, 0, sizeof(adapter->ptp.hw_caps));
2661
2662 if (iavf_get_vf_ptp_caps(adapter))
2663 goto err;
2664
2665 /* We've processed the PF response to the VIRTCHNL_OP_1588_PTP_GET_CAPS
2666 * message we sent previously.
2667 */
2668 adapter->extended_caps &= ~IAVF_EXTENDED_CAP_RECV_PTP;
2669 return;
2670
2671 err:
2672 /* We didn't receive a reply. Make sure we try sending again when
2673 * __IAVF_INIT_FAILED attempts to recover.
2674 */
2675 adapter->extended_caps |= IAVF_EXTENDED_CAP_SEND_PTP;
2676 iavf_change_state(adapter, __IAVF_INIT_FAILED);
2677 }
2678
2679 /**
2680 * iavf_init_process_extended_caps - Part of driver startup
2681 * @adapter: board private structure
2682 *
2683 * Function processes __IAVF_INIT_EXTENDED_CAPS driver state. This state
2684 * handles negotiating capabilities for features which require an additional
2685 * message.
2686 *
2687 * Once all extended capabilities exchanges are finished, the driver will
2688 * transition into __IAVF_INIT_CONFIG_ADAPTER.
2689 */
iavf_init_process_extended_caps(struct iavf_adapter * adapter)2690 static void iavf_init_process_extended_caps(struct iavf_adapter *adapter)
2691 {
2692 WARN_ON(adapter->state != __IAVF_INIT_EXTENDED_CAPS);
2693
2694 /* Process capability exchange for VLAN V2 */
2695 if (adapter->extended_caps & IAVF_EXTENDED_CAP_SEND_VLAN_V2) {
2696 iavf_init_send_offload_vlan_v2_caps(adapter);
2697 return;
2698 } else if (adapter->extended_caps & IAVF_EXTENDED_CAP_RECV_VLAN_V2) {
2699 iavf_init_recv_offload_vlan_v2_caps(adapter);
2700 return;
2701 }
2702
2703 /* Process capability exchange for RXDID formats */
2704 if (adapter->extended_caps & IAVF_EXTENDED_CAP_SEND_RXDID) {
2705 iavf_init_send_supported_rxdids(adapter);
2706 return;
2707 } else if (adapter->extended_caps & IAVF_EXTENDED_CAP_RECV_RXDID) {
2708 iavf_init_recv_supported_rxdids(adapter);
2709 return;
2710 }
2711
2712 /* Process capability exchange for PTP features */
2713 if (adapter->extended_caps & IAVF_EXTENDED_CAP_SEND_PTP) {
2714 iavf_init_send_ptp_caps(adapter);
2715 return;
2716 } else if (adapter->extended_caps & IAVF_EXTENDED_CAP_RECV_PTP) {
2717 iavf_init_recv_ptp_caps(adapter);
2718 return;
2719 }
2720
2721 /* When we reach here, no further extended capabilities exchanges are
2722 * necessary, so we finally transition into __IAVF_INIT_CONFIG_ADAPTER
2723 */
2724 iavf_change_state(adapter, __IAVF_INIT_CONFIG_ADAPTER);
2725 }
2726
2727 /**
2728 * iavf_init_config_adapter - last part of driver startup
2729 * @adapter: board private structure
2730 *
2731 * After all the supported capabilities are negotiated, then the
2732 * __IAVF_INIT_CONFIG_ADAPTER state will finish driver initialization.
2733 */
iavf_init_config_adapter(struct iavf_adapter * adapter)2734 static void iavf_init_config_adapter(struct iavf_adapter *adapter)
2735 {
2736 struct net_device *netdev = adapter->netdev;
2737 struct pci_dev *pdev = adapter->pdev;
2738 int err;
2739
2740 WARN_ON(adapter->state != __IAVF_INIT_CONFIG_ADAPTER);
2741
2742 if (iavf_process_config(adapter))
2743 goto err;
2744
2745 adapter->current_op = VIRTCHNL_OP_UNKNOWN;
2746
2747 adapter->flags |= IAVF_FLAG_RX_CSUM_ENABLED;
2748
2749 netdev->netdev_ops = &iavf_netdev_ops;
2750 iavf_set_ethtool_ops(netdev);
2751 netdev->watchdog_timeo = 5 * HZ;
2752
2753 netdev->min_mtu = ETH_MIN_MTU;
2754
2755 /* PF/VF API: vf_res->max_mtu is max frame size (not MTU).
2756 * Convert to MTU.
2757 */
2758 if (!adapter->vf_res->max_mtu) {
2759 netdev->max_mtu = LIBIE_MAX_MTU;
2760 } else if (adapter->vf_res->max_mtu < LIBETH_RX_LL_LEN + ETH_MIN_MTU ||
2761 adapter->vf_res->max_mtu >
2762 LIBETH_RX_LL_LEN + LIBIE_MAX_MTU) {
2763 netdev_warn_once(adapter->netdev,
2764 "invalid max frame size %d from PF, using default MTU %d",
2765 adapter->vf_res->max_mtu, LIBIE_MAX_MTU);
2766 netdev->max_mtu = LIBIE_MAX_MTU;
2767 } else {
2768 netdev->max_mtu = adapter->vf_res->max_mtu - LIBETH_RX_LL_LEN;
2769 }
2770
2771 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2772 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2773 adapter->hw.mac.addr);
2774 eth_hw_addr_random(netdev);
2775 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
2776 } else {
2777 eth_hw_addr_set(netdev, adapter->hw.mac.addr);
2778 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2779 }
2780
2781 adapter->tx_desc_count = IAVF_DEFAULT_TXD;
2782 adapter->rx_desc_count = IAVF_DEFAULT_RXD;
2783 err = iavf_init_interrupt_scheme(adapter);
2784 if (err)
2785 goto err_sw_init;
2786 iavf_map_rings_to_vectors(adapter);
2787 if (adapter->vf_res->vf_cap_flags &
2788 VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
2789 adapter->flags |= IAVF_FLAG_WB_ON_ITR_CAPABLE;
2790
2791 err = iavf_request_misc_irq(adapter);
2792 if (err)
2793 goto err_sw_init;
2794
2795 netif_carrier_off(netdev);
2796 adapter->link_up = false;
2797 netif_tx_stop_all_queues(netdev);
2798
2799 dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2800 if (netdev->features & NETIF_F_GRO)
2801 dev_info(&pdev->dev, "GRO is enabled\n");
2802
2803 iavf_change_state(adapter, __IAVF_DOWN);
2804 set_bit(__IAVF_VSI_DOWN, adapter->vsi.state);
2805
2806 iavf_misc_irq_enable(adapter);
2807 wake_up(&adapter->down_waitqueue);
2808
2809 adapter->rss_key = kzalloc(adapter->rss_key_size, GFP_KERNEL);
2810 adapter->rss_lut = kzalloc(adapter->rss_lut_size, GFP_KERNEL);
2811 if (!adapter->rss_key || !adapter->rss_lut) {
2812 err = -ENOMEM;
2813 goto err_mem;
2814 }
2815 if (RSS_AQ(adapter))
2816 adapter->aq_required |= IAVF_FLAG_AQ_CONFIGURE_RSS;
2817 else
2818 iavf_init_rss(adapter);
2819
2820 if (VLAN_V2_ALLOWED(adapter))
2821 /* request initial VLAN offload settings */
2822 iavf_set_vlan_offload_features(adapter, 0, netdev->features);
2823
2824 if (QOS_ALLOWED(adapter))
2825 adapter->aq_required |= IAVF_FLAG_AQ_GET_QOS_CAPS;
2826
2827 /* Setup initial PTP configuration */
2828 iavf_ptp_init(adapter);
2829
2830 iavf_schedule_finish_config(adapter);
2831 return;
2832
2833 err_mem:
2834 iavf_free_rss(adapter);
2835 iavf_free_misc_irq(adapter);
2836 err_sw_init:
2837 iavf_reset_interrupt_capability(adapter);
2838 err:
2839 iavf_change_state(adapter, __IAVF_INIT_FAILED);
2840 }
2841
2842 static const int IAVF_NO_RESCHED = -1;
2843
2844 /* return: msec delay for requeueing itself */
iavf_watchdog_step(struct iavf_adapter * adapter)2845 static int iavf_watchdog_step(struct iavf_adapter *adapter)
2846 {
2847 struct iavf_hw *hw = &adapter->hw;
2848 u32 reg_val;
2849
2850 netdev_assert_locked(adapter->netdev);
2851
2852 if (adapter->flags & IAVF_FLAG_PF_COMMS_FAILED)
2853 iavf_change_state(adapter, __IAVF_COMM_FAILED);
2854
2855 switch (adapter->state) {
2856 case __IAVF_STARTUP:
2857 iavf_startup(adapter);
2858 return 30;
2859 case __IAVF_INIT_VERSION_CHECK:
2860 iavf_init_version_check(adapter);
2861 return 30;
2862 case __IAVF_INIT_GET_RESOURCES:
2863 iavf_init_get_resources(adapter);
2864 return 1;
2865 case __IAVF_INIT_EXTENDED_CAPS:
2866 iavf_init_process_extended_caps(adapter);
2867 return 1;
2868 case __IAVF_INIT_CONFIG_ADAPTER:
2869 iavf_init_config_adapter(adapter);
2870 return 1;
2871 case __IAVF_INIT_FAILED:
2872 if (test_bit(__IAVF_IN_REMOVE_TASK,
2873 &adapter->crit_section)) {
2874 /* Do not update the state and do not reschedule
2875 * watchdog task, iavf_remove should handle this state
2876 * as it can loop forever
2877 */
2878 return IAVF_NO_RESCHED;
2879 }
2880 if (++adapter->aq_wait_count > IAVF_AQ_MAX_ERR) {
2881 dev_err(&adapter->pdev->dev,
2882 "Failed to communicate with PF; waiting before retry\n");
2883 adapter->flags |= IAVF_FLAG_PF_COMMS_FAILED;
2884 iavf_shutdown_adminq(hw);
2885 return 5000;
2886 }
2887 /* Try again from failed step*/
2888 iavf_change_state(adapter, adapter->last_state);
2889 return 1000;
2890 case __IAVF_COMM_FAILED:
2891 if (test_bit(__IAVF_IN_REMOVE_TASK,
2892 &adapter->crit_section)) {
2893 /* Set state to __IAVF_INIT_FAILED and perform remove
2894 * steps. Remove IAVF_FLAG_PF_COMMS_FAILED so the task
2895 * doesn't bring the state back to __IAVF_COMM_FAILED.
2896 */
2897 iavf_change_state(adapter, __IAVF_INIT_FAILED);
2898 adapter->flags &= ~IAVF_FLAG_PF_COMMS_FAILED;
2899 return IAVF_NO_RESCHED;
2900 }
2901 reg_val = rd32(hw, IAVF_VFGEN_RSTAT) &
2902 IAVF_VFGEN_RSTAT_VFR_STATE_MASK;
2903 if (reg_val == VIRTCHNL_VFR_VFACTIVE ||
2904 reg_val == VIRTCHNL_VFR_COMPLETED) {
2905 /* A chance for redemption! */
2906 dev_err(&adapter->pdev->dev,
2907 "Hardware came out of reset. Attempting reinit.\n");
2908 /* When init task contacts the PF and
2909 * gets everything set up again, it'll restart the
2910 * watchdog for us. Down, boy. Sit. Stay. Woof.
2911 */
2912 iavf_change_state(adapter, __IAVF_STARTUP);
2913 adapter->flags &= ~IAVF_FLAG_PF_COMMS_FAILED;
2914 }
2915 adapter->aq_required = 0;
2916 adapter->current_op = VIRTCHNL_OP_UNKNOWN;
2917 return 10;
2918 case __IAVF_RESETTING:
2919 return 2000;
2920 case __IAVF_DOWN:
2921 case __IAVF_DOWN_PENDING:
2922 case __IAVF_TESTING:
2923 case __IAVF_RUNNING:
2924 if (adapter->current_op) {
2925 if (!iavf_asq_done(hw)) {
2926 dev_dbg(&adapter->pdev->dev,
2927 "Admin queue timeout\n");
2928 iavf_send_api_ver(adapter);
2929 }
2930 } else {
2931 int ret = iavf_process_aq_command(adapter);
2932
2933 /* An error will be returned if no commands were
2934 * processed; use this opportunity to update stats
2935 * if the error isn't -ENOTSUPP
2936 */
2937 if (ret && ret != -EOPNOTSUPP &&
2938 adapter->state == __IAVF_RUNNING)
2939 iavf_request_stats(adapter);
2940 }
2941 if (adapter->state == __IAVF_RUNNING)
2942 iavf_detect_recover_hung(&adapter->vsi);
2943 break;
2944 case __IAVF_REMOVE:
2945 default:
2946 return IAVF_NO_RESCHED;
2947 }
2948
2949 /* check for hw reset */
2950 reg_val = rd32(hw, IAVF_VF_ARQLEN1) & IAVF_VF_ARQLEN1_ARQENABLE_MASK;
2951 if (!reg_val) {
2952 adapter->aq_required = 0;
2953 adapter->current_op = VIRTCHNL_OP_UNKNOWN;
2954 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
2955 iavf_schedule_reset(adapter, IAVF_FLAG_RESET_PENDING);
2956 }
2957
2958 return adapter->aq_required ? 20 : 2000;
2959 }
2960
iavf_watchdog_task(struct work_struct * work)2961 static void iavf_watchdog_task(struct work_struct *work)
2962 {
2963 struct iavf_adapter *adapter = container_of(work,
2964 struct iavf_adapter,
2965 watchdog_task.work);
2966 struct net_device *netdev = adapter->netdev;
2967 int msec_delay;
2968
2969 netdev_lock(netdev);
2970 msec_delay = iavf_watchdog_step(adapter);
2971 /* note that we schedule a different task */
2972 if (adapter->state >= __IAVF_DOWN)
2973 queue_work(adapter->wq, &adapter->adminq_task);
2974
2975 if (msec_delay != IAVF_NO_RESCHED)
2976 queue_delayed_work(adapter->wq, &adapter->watchdog_task,
2977 msecs_to_jiffies(msec_delay));
2978 netdev_unlock(netdev);
2979 }
2980
2981 /**
2982 * iavf_disable_vf - disable VF
2983 * @adapter: board private structure
2984 *
2985 * Set communication failed flag and free all resources.
2986 */
iavf_disable_vf(struct iavf_adapter * adapter)2987 static void iavf_disable_vf(struct iavf_adapter *adapter)
2988 {
2989 struct iavf_mac_filter *f, *ftmp;
2990 struct iavf_vlan_filter *fv, *fvtmp;
2991 struct iavf_cloud_filter *cf, *cftmp;
2992
2993 netdev_assert_locked(adapter->netdev);
2994
2995 adapter->flags |= IAVF_FLAG_PF_COMMS_FAILED;
2996
2997 iavf_ptp_release(adapter);
2998
2999 /* We don't use netif_running() because it may be true prior to
3000 * ndo_open() returning, so we can't assume it means all our open
3001 * tasks have finished, since we're not holding the rtnl_lock here.
3002 */
3003 if (adapter->state == __IAVF_RUNNING) {
3004 set_bit(__IAVF_VSI_DOWN, adapter->vsi.state);
3005 netif_carrier_off(adapter->netdev);
3006 netif_tx_disable(adapter->netdev);
3007 adapter->link_up = false;
3008 iavf_napi_disable_all(adapter);
3009 iavf_irq_disable(adapter);
3010 iavf_free_traffic_irqs(adapter);
3011 iavf_free_all_tx_resources(adapter);
3012 iavf_free_all_rx_resources(adapter);
3013 }
3014
3015 spin_lock_bh(&adapter->mac_vlan_list_lock);
3016
3017 /* Delete all of the filters */
3018 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
3019 list_del(&f->list);
3020 kfree(f);
3021 }
3022
3023 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list, list) {
3024 list_del(&fv->list);
3025 kfree(fv);
3026 }
3027 adapter->num_vlan_filters = 0;
3028
3029 spin_unlock_bh(&adapter->mac_vlan_list_lock);
3030
3031 spin_lock_bh(&adapter->cloud_filter_list_lock);
3032 list_for_each_entry_safe(cf, cftmp, &adapter->cloud_filter_list, list) {
3033 list_del(&cf->list);
3034 kfree(cf);
3035 adapter->num_cloud_filters--;
3036 }
3037 spin_unlock_bh(&adapter->cloud_filter_list_lock);
3038
3039 iavf_free_misc_irq(adapter);
3040 iavf_free_interrupt_scheme(adapter);
3041 memset(adapter->vf_res, 0, IAVF_VIRTCHNL_VF_RESOURCE_SIZE);
3042 iavf_shutdown_adminq(&adapter->hw);
3043 adapter->flags &= ~IAVF_FLAG_RESET_PENDING;
3044 iavf_change_state(adapter, __IAVF_DOWN);
3045 wake_up(&adapter->down_waitqueue);
3046 dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
3047 }
3048
3049 /**
3050 * iavf_reconfig_qs_bw - Call-back task to handle hardware reset
3051 * @adapter: board private structure
3052 *
3053 * After a reset, the shaper parameters of queues need to be replayed again.
3054 * Since the net_shaper object inside TX rings persists across reset,
3055 * set the update flag for all queues so that the virtchnl message is triggered
3056 * for all queues.
3057 **/
iavf_reconfig_qs_bw(struct iavf_adapter * adapter)3058 static void iavf_reconfig_qs_bw(struct iavf_adapter *adapter)
3059 {
3060 int i, num = 0;
3061
3062 for (i = 0; i < adapter->num_active_queues; i++)
3063 if (adapter->tx_rings[i].q_shaper.bw_min ||
3064 adapter->tx_rings[i].q_shaper.bw_max) {
3065 adapter->tx_rings[i].q_shaper_update = true;
3066 num++;
3067 }
3068
3069 if (num)
3070 adapter->aq_required |= IAVF_FLAG_AQ_CONFIGURE_QUEUES_BW;
3071 }
3072
3073 /**
3074 * iavf_reset_step - Perform the VF reset sequence
3075 * @adapter: board private structure
3076 *
3077 * Requests a reset from PF, polls for completion, and reconfigures
3078 * the driver. Caller must hold the netdev instance lock.
3079 *
3080 * This can sleep for several seconds while polling HW registers.
3081 */
iavf_reset_step(struct iavf_adapter * adapter)3082 void iavf_reset_step(struct iavf_adapter *adapter)
3083 {
3084 struct virtchnl_vf_resource *vfres = adapter->vf_res;
3085 struct net_device *netdev = adapter->netdev;
3086 struct iavf_hw *hw = &adapter->hw;
3087 struct iavf_mac_filter *f, *ftmp;
3088 struct iavf_cloud_filter *cf;
3089 enum iavf_status status;
3090 u32 reg_val;
3091 int i = 0, err;
3092 bool running;
3093
3094 netdev_assert_locked(netdev);
3095
3096 iavf_misc_irq_disable(adapter);
3097 if (adapter->flags & IAVF_FLAG_RESET_NEEDED) {
3098 adapter->flags &= ~IAVF_FLAG_RESET_NEEDED;
3099 /* Restart the AQ here. If we have been reset but didn't
3100 * detect it, or if the PF had to reinit, our AQ will be hosed.
3101 */
3102 iavf_shutdown_adminq(hw);
3103 iavf_init_adminq(hw);
3104 iavf_request_reset(adapter);
3105 }
3106 adapter->flags |= IAVF_FLAG_RESET_PENDING;
3107
3108 /* poll until we see the reset actually happen */
3109 for (i = 0; i < IAVF_RESET_WAIT_DETECTED_COUNT; i++) {
3110 reg_val = rd32(hw, IAVF_VF_ARQLEN1) &
3111 IAVF_VF_ARQLEN1_ARQENABLE_MASK;
3112 if (!reg_val)
3113 break;
3114 usleep_range(5000, 10000);
3115 }
3116 if (i == IAVF_RESET_WAIT_DETECTED_COUNT) {
3117 dev_info(&adapter->pdev->dev, "Never saw reset\n");
3118 goto continue_reset; /* act like the reset happened */
3119 }
3120
3121 /* wait until the reset is complete and the PF is responding to us */
3122 for (i = 0; i < IAVF_RESET_WAIT_COMPLETE_COUNT; i++) {
3123 /* sleep first to make sure a minimum wait time is met */
3124 msleep(IAVF_RESET_WAIT_MS);
3125
3126 reg_val = rd32(hw, IAVF_VFGEN_RSTAT) &
3127 IAVF_VFGEN_RSTAT_VFR_STATE_MASK;
3128 if (reg_val == VIRTCHNL_VFR_VFACTIVE)
3129 break;
3130 }
3131
3132 pci_set_master(adapter->pdev);
3133 pci_restore_msi_state(adapter->pdev);
3134
3135 if (i == IAVF_RESET_WAIT_COMPLETE_COUNT) {
3136 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
3137 reg_val);
3138 iavf_disable_vf(adapter);
3139 return; /* Do not attempt to reinit. It's dead, Jim. */
3140 }
3141
3142 continue_reset:
3143 /* If we are still early in the state machine, just restart. */
3144 if (adapter->state <= __IAVF_INIT_FAILED) {
3145 iavf_shutdown_adminq(hw);
3146 iavf_change_state(adapter, __IAVF_STARTUP);
3147 iavf_startup(adapter);
3148 queue_delayed_work(adapter->wq, &adapter->watchdog_task,
3149 msecs_to_jiffies(30));
3150 return;
3151 }
3152
3153 /* We don't use netif_running() because it may be true prior to
3154 * ndo_open() returning, so we can't assume it means all our open
3155 * tasks have finished, since we're not holding the rtnl_lock here.
3156 */
3157 running = adapter->state == __IAVF_RUNNING;
3158
3159 if (running) {
3160 netif_carrier_off(netdev);
3161 netif_tx_stop_all_queues(netdev);
3162 adapter->link_up = false;
3163 iavf_napi_disable_all(adapter);
3164 }
3165 iavf_irq_disable(adapter);
3166
3167 iavf_change_state(adapter, __IAVF_RESETTING);
3168 adapter->flags &= ~IAVF_FLAG_RESET_PENDING;
3169
3170 iavf_ptp_release(adapter);
3171
3172 /* free the Tx/Rx rings and descriptors, might be better to just
3173 * re-use them sometime in the future
3174 */
3175 iavf_free_all_rx_resources(adapter);
3176 iavf_free_all_tx_resources(adapter);
3177
3178 adapter->flags |= IAVF_FLAG_QUEUES_DISABLED;
3179 /* kill and reinit the admin queue */
3180 iavf_shutdown_adminq(hw);
3181 adapter->current_op = VIRTCHNL_OP_UNKNOWN;
3182 status = iavf_init_adminq(hw);
3183 if (status) {
3184 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
3185 status);
3186 goto reset_err;
3187 }
3188 adapter->aq_required = 0;
3189
3190 if ((adapter->flags & IAVF_FLAG_REINIT_MSIX_NEEDED) ||
3191 (adapter->flags & IAVF_FLAG_REINIT_ITR_NEEDED)) {
3192 err = iavf_reinit_interrupt_scheme(adapter, running);
3193 if (err)
3194 goto reset_err;
3195 }
3196
3197 if (RSS_AQ(adapter)) {
3198 adapter->aq_required |= IAVF_FLAG_AQ_CONFIGURE_RSS;
3199 } else {
3200 err = iavf_init_rss(adapter);
3201 if (err)
3202 goto reset_err;
3203 }
3204
3205 adapter->aq_required |= IAVF_FLAG_AQ_GET_CONFIG;
3206 adapter->aq_required |= IAVF_FLAG_AQ_MAP_VECTORS;
3207
3208 /* Certain capabilities require an extended negotiation process using
3209 * extra messages that must be processed after getting the VF
3210 * configuration. The related checks such as VLAN_V2_ALLOWED() are not
3211 * reliable here, since the configuration has not yet been negotiated.
3212 *
3213 * Always set these flags, since them related VIRTCHNL messages won't
3214 * be sent until after VIRTCHNL_OP_GET_VF_RESOURCES.
3215 */
3216 adapter->aq_required |= IAVF_FLAG_AQ_EXTENDED_CAPS;
3217
3218 spin_lock_bh(&adapter->mac_vlan_list_lock);
3219
3220 /* Delete filter for the current MAC address, it could have
3221 * been changed by the PF via administratively set MAC.
3222 * Will be re-added via VIRTCHNL_OP_GET_VF_RESOURCES.
3223 */
3224 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
3225 if (ether_addr_equal(f->macaddr, adapter->hw.mac.addr)) {
3226 list_del(&f->list);
3227 kfree(f);
3228 }
3229 }
3230 /* re-add all MAC filters */
3231 list_for_each_entry(f, &adapter->mac_filter_list, list) {
3232 f->add = true;
3233 }
3234 spin_unlock_bh(&adapter->mac_vlan_list_lock);
3235
3236 /* check if TCs are running and re-add all cloud filters */
3237 spin_lock_bh(&adapter->cloud_filter_list_lock);
3238 if ((vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) &&
3239 adapter->num_tc) {
3240 list_for_each_entry(cf, &adapter->cloud_filter_list, list) {
3241 cf->add = true;
3242 }
3243 }
3244 spin_unlock_bh(&adapter->cloud_filter_list_lock);
3245
3246 adapter->aq_required |= IAVF_FLAG_AQ_ADD_MAC_FILTER;
3247 adapter->aq_required |= IAVF_FLAG_AQ_ADD_CLOUD_FILTER;
3248 iavf_misc_irq_enable(adapter);
3249
3250 mod_delayed_work(adapter->wq, &adapter->watchdog_task, 2);
3251
3252 /* We were running when the reset started, so we need to restore some
3253 * state here.
3254 */
3255 if (running) {
3256 /* allocate transmit descriptors */
3257 err = iavf_setup_all_tx_resources(adapter);
3258 if (err)
3259 goto reset_err;
3260
3261 /* allocate receive descriptors */
3262 err = iavf_setup_all_rx_resources(adapter);
3263 if (err)
3264 goto reset_err;
3265
3266 if ((adapter->flags & IAVF_FLAG_REINIT_MSIX_NEEDED) ||
3267 (adapter->flags & IAVF_FLAG_REINIT_ITR_NEEDED)) {
3268 err = iavf_request_traffic_irqs(adapter, netdev->name);
3269 if (err)
3270 goto reset_err;
3271
3272 adapter->flags &= ~IAVF_FLAG_REINIT_MSIX_NEEDED;
3273 }
3274
3275 iavf_configure(adapter);
3276
3277 /* iavf_up_complete() will switch device back
3278 * to __IAVF_RUNNING
3279 */
3280 iavf_up_complete(adapter);
3281
3282 iavf_irq_enable(adapter, true);
3283
3284 iavf_reconfig_qs_bw(adapter);
3285 } else {
3286 iavf_change_state(adapter, __IAVF_DOWN);
3287 wake_up(&adapter->down_waitqueue);
3288 }
3289
3290 adapter->flags &= ~IAVF_FLAG_REINIT_ITR_NEEDED;
3291
3292 return;
3293 reset_err:
3294 if (running) {
3295 set_bit(__IAVF_VSI_DOWN, adapter->vsi.state);
3296 iavf_free_traffic_irqs(adapter);
3297 }
3298 iavf_disable_vf(adapter);
3299
3300 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
3301 }
3302
iavf_reset_task(struct work_struct * work)3303 static void iavf_reset_task(struct work_struct *work)
3304 {
3305 struct iavf_adapter *adapter = container_of(work,
3306 struct iavf_adapter,
3307 reset_task);
3308 struct net_device *netdev = adapter->netdev;
3309
3310 netdev_lock(netdev);
3311 iavf_reset_step(adapter);
3312 netdev_unlock(netdev);
3313 }
3314
3315 /**
3316 * iavf_adminq_task - worker thread to clean the admin queue
3317 * @work: pointer to work_struct containing our data
3318 **/
iavf_adminq_task(struct work_struct * work)3319 static void iavf_adminq_task(struct work_struct *work)
3320 {
3321 struct iavf_adapter *adapter =
3322 container_of(work, struct iavf_adapter, adminq_task);
3323 struct net_device *netdev = adapter->netdev;
3324 struct iavf_hw *hw = &adapter->hw;
3325 struct iavf_arq_event_info event;
3326 enum virtchnl_ops v_op;
3327 enum iavf_status ret, v_ret;
3328 u32 val, oldval;
3329 u16 pending;
3330
3331 netdev_lock(netdev);
3332
3333 if (adapter->flags & IAVF_FLAG_PF_COMMS_FAILED)
3334 goto unlock;
3335
3336 event.buf_len = IAVF_MAX_AQ_BUF_SIZE;
3337 event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
3338 if (!event.msg_buf)
3339 goto unlock;
3340
3341 do {
3342 ret = iavf_clean_arq_element(hw, &event, &pending);
3343 v_op = (enum virtchnl_ops)le32_to_cpu(event.desc.cookie_high);
3344 v_ret = (enum iavf_status)le32_to_cpu(event.desc.cookie_low);
3345
3346 if (ret || !v_op)
3347 break; /* No event to process or error cleaning ARQ */
3348
3349 iavf_virtchnl_completion(adapter, v_op, v_ret, event.msg_buf,
3350 event.msg_len);
3351 if (pending != 0)
3352 memset(event.msg_buf, 0, IAVF_MAX_AQ_BUF_SIZE);
3353 } while (pending);
3354
3355 if (iavf_is_reset_in_progress(adapter))
3356 goto freedom;
3357
3358 /* check for error indications */
3359 val = rd32(hw, IAVF_VF_ARQLEN1);
3360 if (val == 0xdeadbeef || val == 0xffffffff) /* device in reset */
3361 goto freedom;
3362 oldval = val;
3363 if (val & IAVF_VF_ARQLEN1_ARQVFE_MASK) {
3364 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
3365 val &= ~IAVF_VF_ARQLEN1_ARQVFE_MASK;
3366 }
3367 if (val & IAVF_VF_ARQLEN1_ARQOVFL_MASK) {
3368 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
3369 val &= ~IAVF_VF_ARQLEN1_ARQOVFL_MASK;
3370 }
3371 if (val & IAVF_VF_ARQLEN1_ARQCRIT_MASK) {
3372 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
3373 val &= ~IAVF_VF_ARQLEN1_ARQCRIT_MASK;
3374 }
3375 if (oldval != val)
3376 wr32(hw, IAVF_VF_ARQLEN1, val);
3377
3378 val = rd32(hw, IAVF_VF_ATQLEN1);
3379 oldval = val;
3380 if (val & IAVF_VF_ATQLEN1_ATQVFE_MASK) {
3381 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
3382 val &= ~IAVF_VF_ATQLEN1_ATQVFE_MASK;
3383 }
3384 if (val & IAVF_VF_ATQLEN1_ATQOVFL_MASK) {
3385 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
3386 val &= ~IAVF_VF_ATQLEN1_ATQOVFL_MASK;
3387 }
3388 if (val & IAVF_VF_ATQLEN1_ATQCRIT_MASK) {
3389 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
3390 val &= ~IAVF_VF_ATQLEN1_ATQCRIT_MASK;
3391 }
3392 if (oldval != val)
3393 wr32(hw, IAVF_VF_ATQLEN1, val);
3394
3395 freedom:
3396 kfree(event.msg_buf);
3397 unlock:
3398 netdev_unlock(netdev);
3399 /* re-enable Admin queue interrupt cause */
3400 iavf_misc_irq_enable(adapter);
3401 }
3402
3403 /**
3404 * iavf_free_all_tx_resources - Free Tx Resources for All Queues
3405 * @adapter: board private structure
3406 *
3407 * Free all transmit software resources
3408 **/
iavf_free_all_tx_resources(struct iavf_adapter * adapter)3409 void iavf_free_all_tx_resources(struct iavf_adapter *adapter)
3410 {
3411 int i;
3412
3413 if (!adapter->tx_rings)
3414 return;
3415
3416 for (i = 0; i < adapter->num_active_queues; i++)
3417 if (adapter->tx_rings[i].desc)
3418 iavf_free_tx_resources(&adapter->tx_rings[i]);
3419 }
3420
3421 /**
3422 * iavf_setup_all_tx_resources - allocate all queues Tx resources
3423 * @adapter: board private structure
3424 *
3425 * If this function returns with an error, then it's possible one or
3426 * more of the rings is populated (while the rest are not). It is the
3427 * callers duty to clean those orphaned rings.
3428 *
3429 * Return 0 on success, negative on failure
3430 **/
iavf_setup_all_tx_resources(struct iavf_adapter * adapter)3431 static int iavf_setup_all_tx_resources(struct iavf_adapter *adapter)
3432 {
3433 int i, err = 0;
3434
3435 for (i = 0; i < adapter->num_active_queues; i++) {
3436 adapter->tx_rings[i].count = adapter->tx_desc_count;
3437 err = iavf_setup_tx_descriptors(&adapter->tx_rings[i]);
3438 if (!err)
3439 continue;
3440 dev_err(&adapter->pdev->dev,
3441 "Allocation for Tx Queue %u failed\n", i);
3442 break;
3443 }
3444
3445 return err;
3446 }
3447
3448 /**
3449 * iavf_setup_all_rx_resources - allocate all queues Rx resources
3450 * @adapter: board private structure
3451 *
3452 * If this function returns with an error, then it's possible one or
3453 * more of the rings is populated (while the rest are not). It is the
3454 * callers duty to clean those orphaned rings.
3455 *
3456 * Return 0 on success, negative on failure
3457 **/
iavf_setup_all_rx_resources(struct iavf_adapter * adapter)3458 static int iavf_setup_all_rx_resources(struct iavf_adapter *adapter)
3459 {
3460 int i, err = 0;
3461
3462 for (i = 0; i < adapter->num_active_queues; i++) {
3463 adapter->rx_rings[i].count = adapter->rx_desc_count;
3464 err = iavf_setup_rx_descriptors(&adapter->rx_rings[i]);
3465 if (!err)
3466 continue;
3467 dev_err(&adapter->pdev->dev,
3468 "Allocation for Rx Queue %u failed\n", i);
3469 break;
3470 }
3471 return err;
3472 }
3473
3474 /**
3475 * iavf_free_all_rx_resources - Free Rx Resources for All Queues
3476 * @adapter: board private structure
3477 *
3478 * Free all receive software resources
3479 **/
iavf_free_all_rx_resources(struct iavf_adapter * adapter)3480 void iavf_free_all_rx_resources(struct iavf_adapter *adapter)
3481 {
3482 int i;
3483
3484 if (!adapter->rx_rings)
3485 return;
3486
3487 for (i = 0; i < adapter->num_active_queues; i++)
3488 if (adapter->rx_rings[i].desc)
3489 iavf_free_rx_resources(&adapter->rx_rings[i]);
3490 }
3491
3492 /**
3493 * iavf_validate_tx_bandwidth - validate the max Tx bandwidth
3494 * @adapter: board private structure
3495 * @max_tx_rate: max Tx bw for a tc
3496 **/
iavf_validate_tx_bandwidth(struct iavf_adapter * adapter,u64 max_tx_rate)3497 static int iavf_validate_tx_bandwidth(struct iavf_adapter *adapter,
3498 u64 max_tx_rate)
3499 {
3500 int speed = 0, ret = 0;
3501
3502 if (ADV_LINK_SUPPORT(adapter)) {
3503 if (adapter->link_speed_mbps < U32_MAX) {
3504 speed = adapter->link_speed_mbps;
3505 goto validate_bw;
3506 } else {
3507 dev_err(&adapter->pdev->dev, "Unknown link speed\n");
3508 return -EINVAL;
3509 }
3510 }
3511
3512 switch (adapter->link_speed) {
3513 case VIRTCHNL_LINK_SPEED_40GB:
3514 speed = SPEED_40000;
3515 break;
3516 case VIRTCHNL_LINK_SPEED_25GB:
3517 speed = SPEED_25000;
3518 break;
3519 case VIRTCHNL_LINK_SPEED_20GB:
3520 speed = SPEED_20000;
3521 break;
3522 case VIRTCHNL_LINK_SPEED_10GB:
3523 speed = SPEED_10000;
3524 break;
3525 case VIRTCHNL_LINK_SPEED_5GB:
3526 speed = SPEED_5000;
3527 break;
3528 case VIRTCHNL_LINK_SPEED_2_5GB:
3529 speed = SPEED_2500;
3530 break;
3531 case VIRTCHNL_LINK_SPEED_1GB:
3532 speed = SPEED_1000;
3533 break;
3534 case VIRTCHNL_LINK_SPEED_100MB:
3535 speed = SPEED_100;
3536 break;
3537 default:
3538 break;
3539 }
3540
3541 validate_bw:
3542 if (max_tx_rate > speed) {
3543 dev_err(&adapter->pdev->dev,
3544 "Invalid tx rate specified\n");
3545 ret = -EINVAL;
3546 }
3547
3548 return ret;
3549 }
3550
3551 /**
3552 * iavf_validate_ch_config - validate queue mapping info
3553 * @adapter: board private structure
3554 * @mqprio_qopt: queue parameters
3555 *
3556 * This function validates if the config provided by the user to
3557 * configure queue channels is valid or not. Returns 0 on a valid
3558 * config.
3559 **/
iavf_validate_ch_config(struct iavf_adapter * adapter,struct tc_mqprio_qopt_offload * mqprio_qopt)3560 static int iavf_validate_ch_config(struct iavf_adapter *adapter,
3561 struct tc_mqprio_qopt_offload *mqprio_qopt)
3562 {
3563 u64 total_max_rate = 0;
3564 u32 tx_rate_rem = 0;
3565 int i, num_qps = 0;
3566 u64 tx_rate = 0;
3567 int ret = 0;
3568
3569 if (mqprio_qopt->qopt.num_tc > IAVF_MAX_TRAFFIC_CLASS ||
3570 mqprio_qopt->qopt.num_tc < 1)
3571 return -EINVAL;
3572
3573 for (i = 0; i <= mqprio_qopt->qopt.num_tc - 1; i++) {
3574 if (!mqprio_qopt->qopt.count[i] ||
3575 mqprio_qopt->qopt.offset[i] != num_qps)
3576 return -EINVAL;
3577 if (mqprio_qopt->min_rate[i]) {
3578 dev_err(&adapter->pdev->dev,
3579 "Invalid min tx rate (greater than 0) specified for TC%d\n",
3580 i);
3581 return -EINVAL;
3582 }
3583
3584 /* convert to Mbps */
3585 tx_rate = div_u64(mqprio_qopt->max_rate[i],
3586 IAVF_MBPS_DIVISOR);
3587
3588 if (mqprio_qopt->max_rate[i] &&
3589 tx_rate < IAVF_MBPS_QUANTA) {
3590 dev_err(&adapter->pdev->dev,
3591 "Invalid max tx rate for TC%d, minimum %dMbps\n",
3592 i, IAVF_MBPS_QUANTA);
3593 return -EINVAL;
3594 }
3595
3596 (void)div_u64_rem(tx_rate, IAVF_MBPS_QUANTA, &tx_rate_rem);
3597
3598 if (tx_rate_rem != 0) {
3599 dev_err(&adapter->pdev->dev,
3600 "Invalid max tx rate for TC%d, not divisible by %d\n",
3601 i, IAVF_MBPS_QUANTA);
3602 return -EINVAL;
3603 }
3604
3605 total_max_rate += tx_rate;
3606 num_qps += mqprio_qopt->qopt.count[i];
3607 }
3608 if (num_qps > adapter->num_active_queues) {
3609 dev_err(&adapter->pdev->dev,
3610 "Cannot support requested number of queues\n");
3611 return -EINVAL;
3612 }
3613
3614 ret = iavf_validate_tx_bandwidth(adapter, total_max_rate);
3615 return ret;
3616 }
3617
3618 /**
3619 * iavf_del_all_cloud_filters - delete all cloud filters on the traffic classes
3620 * @adapter: board private structure
3621 **/
iavf_del_all_cloud_filters(struct iavf_adapter * adapter)3622 static void iavf_del_all_cloud_filters(struct iavf_adapter *adapter)
3623 {
3624 struct iavf_cloud_filter *cf, *cftmp;
3625
3626 spin_lock_bh(&adapter->cloud_filter_list_lock);
3627 list_for_each_entry_safe(cf, cftmp, &adapter->cloud_filter_list,
3628 list) {
3629 list_del(&cf->list);
3630 kfree(cf);
3631 adapter->num_cloud_filters--;
3632 }
3633 spin_unlock_bh(&adapter->cloud_filter_list_lock);
3634 }
3635
3636 /**
3637 * iavf_is_tc_config_same - Compare the mqprio TC config with the
3638 * TC config already configured on this adapter.
3639 * @adapter: board private structure
3640 * @mqprio_qopt: TC config received from kernel.
3641 *
3642 * This function compares the TC config received from the kernel
3643 * with the config already configured on the adapter.
3644 *
3645 * Return: True if configuration is same, false otherwise.
3646 **/
iavf_is_tc_config_same(struct iavf_adapter * adapter,struct tc_mqprio_qopt * mqprio_qopt)3647 static bool iavf_is_tc_config_same(struct iavf_adapter *adapter,
3648 struct tc_mqprio_qopt *mqprio_qopt)
3649 {
3650 struct virtchnl_channel_info *ch = &adapter->ch_config.ch_info[0];
3651 int i;
3652
3653 if (adapter->num_tc != mqprio_qopt->num_tc)
3654 return false;
3655
3656 for (i = 0; i < adapter->num_tc; i++) {
3657 if (ch[i].count != mqprio_qopt->count[i] ||
3658 ch[i].offset != mqprio_qopt->offset[i])
3659 return false;
3660 }
3661 return true;
3662 }
3663
3664 /**
3665 * __iavf_setup_tc - configure multiple traffic classes
3666 * @netdev: network interface device structure
3667 * @type_data: tc offload data
3668 *
3669 * This function processes the config information provided by the
3670 * user to configure traffic classes/queue channels and packages the
3671 * information to request the PF to setup traffic classes.
3672 *
3673 * Returns 0 on success.
3674 **/
__iavf_setup_tc(struct net_device * netdev,void * type_data)3675 static int __iavf_setup_tc(struct net_device *netdev, void *type_data)
3676 {
3677 struct tc_mqprio_qopt_offload *mqprio_qopt = type_data;
3678 struct iavf_adapter *adapter = netdev_priv(netdev);
3679 struct virtchnl_vf_resource *vfres = adapter->vf_res;
3680 u8 num_tc = 0, total_qps = 0;
3681 int ret = 0, netdev_tc = 0;
3682 u64 max_tx_rate;
3683 u16 mode;
3684 int i;
3685
3686 num_tc = mqprio_qopt->qopt.num_tc;
3687 mode = mqprio_qopt->mode;
3688
3689 /* delete queue_channel */
3690 if (!mqprio_qopt->qopt.hw) {
3691 if (adapter->ch_config.state == __IAVF_TC_RUNNING) {
3692 /* reset the tc configuration */
3693 netdev_reset_tc(netdev);
3694 adapter->num_tc = 0;
3695 netif_tx_stop_all_queues(netdev);
3696 netif_tx_disable(netdev);
3697 iavf_del_all_cloud_filters(adapter);
3698 adapter->aq_required = IAVF_FLAG_AQ_DISABLE_CHANNELS;
3699 total_qps = adapter->orig_num_active_queues;
3700 goto exit;
3701 } else {
3702 return -EINVAL;
3703 }
3704 }
3705
3706 /* add queue channel */
3707 if (mode == TC_MQPRIO_MODE_CHANNEL) {
3708 if (!(vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ)) {
3709 dev_err(&adapter->pdev->dev, "ADq not supported\n");
3710 return -EOPNOTSUPP;
3711 }
3712 if (adapter->ch_config.state != __IAVF_TC_INVALID) {
3713 dev_err(&adapter->pdev->dev, "TC configuration already exists\n");
3714 return -EINVAL;
3715 }
3716
3717 ret = iavf_validate_ch_config(adapter, mqprio_qopt);
3718 if (ret)
3719 return ret;
3720 /* Return if same TC config is requested */
3721 if (iavf_is_tc_config_same(adapter, &mqprio_qopt->qopt))
3722 return 0;
3723 adapter->num_tc = num_tc;
3724
3725 for (i = 0; i < IAVF_MAX_TRAFFIC_CLASS; i++) {
3726 if (i < num_tc) {
3727 adapter->ch_config.ch_info[i].count =
3728 mqprio_qopt->qopt.count[i];
3729 adapter->ch_config.ch_info[i].offset =
3730 mqprio_qopt->qopt.offset[i];
3731 total_qps += mqprio_qopt->qopt.count[i];
3732 max_tx_rate = mqprio_qopt->max_rate[i];
3733 /* convert to Mbps */
3734 max_tx_rate = div_u64(max_tx_rate,
3735 IAVF_MBPS_DIVISOR);
3736 adapter->ch_config.ch_info[i].max_tx_rate =
3737 max_tx_rate;
3738 } else {
3739 adapter->ch_config.ch_info[i].count = 1;
3740 adapter->ch_config.ch_info[i].offset = 0;
3741 }
3742 }
3743
3744 /* Take snapshot of original config such as "num_active_queues"
3745 * It is used later when delete ADQ flow is exercised, so that
3746 * once delete ADQ flow completes, VF shall go back to its
3747 * original queue configuration
3748 */
3749
3750 adapter->orig_num_active_queues = adapter->num_active_queues;
3751
3752 /* Store queue info based on TC so that VF gets configured
3753 * with correct number of queues when VF completes ADQ config
3754 * flow
3755 */
3756 adapter->ch_config.total_qps = total_qps;
3757
3758 netif_tx_stop_all_queues(netdev);
3759 netif_tx_disable(netdev);
3760 adapter->aq_required |= IAVF_FLAG_AQ_ENABLE_CHANNELS;
3761 netdev_reset_tc(netdev);
3762 /* Report the tc mapping up the stack */
3763 netdev_set_num_tc(adapter->netdev, num_tc);
3764 for (i = 0; i < IAVF_MAX_TRAFFIC_CLASS; i++) {
3765 u16 qcount = mqprio_qopt->qopt.count[i];
3766 u16 qoffset = mqprio_qopt->qopt.offset[i];
3767
3768 if (i < num_tc)
3769 netdev_set_tc_queue(netdev, netdev_tc++, qcount,
3770 qoffset);
3771 }
3772 }
3773 exit:
3774 if (test_bit(__IAVF_IN_REMOVE_TASK, &adapter->crit_section))
3775 return 0;
3776
3777 netif_set_real_num_rx_queues(netdev, total_qps);
3778 netif_set_real_num_tx_queues(netdev, total_qps);
3779
3780 return ret;
3781 }
3782
3783 /**
3784 * iavf_parse_cls_flower - Parse tc flower filters provided by kernel
3785 * @adapter: board private structure
3786 * @f: pointer to struct flow_cls_offload
3787 * @filter: pointer to cloud filter structure
3788 */
iavf_parse_cls_flower(struct iavf_adapter * adapter,struct flow_cls_offload * f,struct iavf_cloud_filter * filter)3789 static int iavf_parse_cls_flower(struct iavf_adapter *adapter,
3790 struct flow_cls_offload *f,
3791 struct iavf_cloud_filter *filter)
3792 {
3793 struct flow_rule *rule = flow_cls_offload_flow_rule(f);
3794 struct flow_dissector *dissector = rule->match.dissector;
3795 u16 n_proto_mask = 0;
3796 u16 n_proto_key = 0;
3797 u8 field_flags = 0;
3798 u16 addr_type = 0;
3799 u16 n_proto = 0;
3800 int i = 0;
3801 struct virtchnl_filter *vf = &filter->f;
3802
3803 if (dissector->used_keys &
3804 ~(BIT_ULL(FLOW_DISSECTOR_KEY_CONTROL) |
3805 BIT_ULL(FLOW_DISSECTOR_KEY_BASIC) |
3806 BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
3807 BIT_ULL(FLOW_DISSECTOR_KEY_VLAN) |
3808 BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
3809 BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
3810 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS) |
3811 BIT_ULL(FLOW_DISSECTOR_KEY_ENC_KEYID))) {
3812 dev_err(&adapter->pdev->dev, "Unsupported key used: 0x%llx\n",
3813 dissector->used_keys);
3814 return -EOPNOTSUPP;
3815 }
3816
3817 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_KEYID)) {
3818 struct flow_match_enc_keyid match;
3819
3820 flow_rule_match_enc_keyid(rule, &match);
3821 if (match.mask->keyid != 0)
3822 field_flags |= IAVF_CLOUD_FIELD_TEN_ID;
3823 }
3824
3825 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
3826 struct flow_match_basic match;
3827
3828 flow_rule_match_basic(rule, &match);
3829 n_proto_key = ntohs(match.key->n_proto);
3830 n_proto_mask = ntohs(match.mask->n_proto);
3831
3832 if (n_proto_key == ETH_P_ALL) {
3833 n_proto_key = 0;
3834 n_proto_mask = 0;
3835 }
3836 n_proto = n_proto_key & n_proto_mask;
3837 if (n_proto != ETH_P_IP && n_proto != ETH_P_IPV6)
3838 return -EINVAL;
3839 if (n_proto == ETH_P_IPV6) {
3840 /* specify flow type as TCP IPv6 */
3841 vf->flow_type = VIRTCHNL_TCP_V6_FLOW;
3842 }
3843
3844 if (match.key->ip_proto != IPPROTO_TCP) {
3845 dev_info(&adapter->pdev->dev, "Only TCP transport is supported\n");
3846 return -EINVAL;
3847 }
3848 }
3849
3850 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
3851 struct flow_match_eth_addrs match;
3852
3853 flow_rule_match_eth_addrs(rule, &match);
3854
3855 /* use is_broadcast and is_zero to check for all 0xf or 0 */
3856 if (!is_zero_ether_addr(match.mask->dst)) {
3857 if (is_broadcast_ether_addr(match.mask->dst)) {
3858 field_flags |= IAVF_CLOUD_FIELD_OMAC;
3859 } else {
3860 dev_err(&adapter->pdev->dev, "Bad ether dest mask %pM\n",
3861 match.mask->dst);
3862 return -EINVAL;
3863 }
3864 }
3865
3866 if (!is_zero_ether_addr(match.mask->src)) {
3867 if (is_broadcast_ether_addr(match.mask->src)) {
3868 field_flags |= IAVF_CLOUD_FIELD_IMAC;
3869 } else {
3870 dev_err(&adapter->pdev->dev, "Bad ether src mask %pM\n",
3871 match.mask->src);
3872 return -EINVAL;
3873 }
3874 }
3875
3876 if (!is_zero_ether_addr(match.key->dst))
3877 if (is_valid_ether_addr(match.key->dst) ||
3878 is_multicast_ether_addr(match.key->dst)) {
3879 /* set the mask if a valid dst_mac address */
3880 for (i = 0; i < ETH_ALEN; i++)
3881 vf->mask.tcp_spec.dst_mac[i] |= 0xff;
3882 ether_addr_copy(vf->data.tcp_spec.dst_mac,
3883 match.key->dst);
3884 }
3885
3886 if (!is_zero_ether_addr(match.key->src))
3887 if (is_valid_ether_addr(match.key->src) ||
3888 is_multicast_ether_addr(match.key->src)) {
3889 /* set the mask if a valid dst_mac address */
3890 for (i = 0; i < ETH_ALEN; i++)
3891 vf->mask.tcp_spec.src_mac[i] |= 0xff;
3892 ether_addr_copy(vf->data.tcp_spec.src_mac,
3893 match.key->src);
3894 }
3895 }
3896
3897 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) {
3898 struct flow_match_vlan match;
3899
3900 flow_rule_match_vlan(rule, &match);
3901 if (match.mask->vlan_id) {
3902 if (match.mask->vlan_id == VLAN_VID_MASK) {
3903 field_flags |= IAVF_CLOUD_FIELD_IVLAN;
3904 } else {
3905 dev_err(&adapter->pdev->dev, "Bad vlan mask %u\n",
3906 match.mask->vlan_id);
3907 return -EINVAL;
3908 }
3909 }
3910 vf->mask.tcp_spec.vlan_id |= cpu_to_be16(0xffff);
3911 vf->data.tcp_spec.vlan_id = cpu_to_be16(match.key->vlan_id);
3912 }
3913
3914 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) {
3915 struct flow_match_control match;
3916
3917 flow_rule_match_control(rule, &match);
3918 addr_type = match.key->addr_type;
3919
3920 if (flow_rule_has_control_flags(match.mask->flags,
3921 f->common.extack))
3922 return -EOPNOTSUPP;
3923 }
3924
3925 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
3926 struct flow_match_ipv4_addrs match;
3927
3928 flow_rule_match_ipv4_addrs(rule, &match);
3929 if (match.mask->dst) {
3930 if (match.mask->dst == cpu_to_be32(0xffffffff)) {
3931 field_flags |= IAVF_CLOUD_FIELD_IIP;
3932 } else {
3933 dev_err(&adapter->pdev->dev, "Bad ip dst mask 0x%08x\n",
3934 be32_to_cpu(match.mask->dst));
3935 return -EINVAL;
3936 }
3937 }
3938
3939 if (match.mask->src) {
3940 if (match.mask->src == cpu_to_be32(0xffffffff)) {
3941 field_flags |= IAVF_CLOUD_FIELD_IIP;
3942 } else {
3943 dev_err(&adapter->pdev->dev, "Bad ip src mask 0x%08x\n",
3944 be32_to_cpu(match.mask->src));
3945 return -EINVAL;
3946 }
3947 }
3948
3949 if (field_flags & IAVF_CLOUD_FIELD_TEN_ID) {
3950 dev_info(&adapter->pdev->dev, "Tenant id not allowed for ip filter\n");
3951 return -EINVAL;
3952 }
3953 if (match.key->dst) {
3954 vf->mask.tcp_spec.dst_ip[0] |= cpu_to_be32(0xffffffff);
3955 vf->data.tcp_spec.dst_ip[0] = match.key->dst;
3956 }
3957 if (match.key->src) {
3958 vf->mask.tcp_spec.src_ip[0] |= cpu_to_be32(0xffffffff);
3959 vf->data.tcp_spec.src_ip[0] = match.key->src;
3960 }
3961 }
3962
3963 if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
3964 struct flow_match_ipv6_addrs match;
3965
3966 flow_rule_match_ipv6_addrs(rule, &match);
3967
3968 /* validate mask, make sure it is not IPV6_ADDR_ANY */
3969 if (ipv6_addr_any(&match.mask->dst)) {
3970 dev_err(&adapter->pdev->dev, "Bad ipv6 dst mask 0x%02x\n",
3971 IPV6_ADDR_ANY);
3972 return -EINVAL;
3973 }
3974
3975 /* src and dest IPv6 address should not be LOOPBACK
3976 * (0:0:0:0:0:0:0:1) which can be represented as ::1
3977 */
3978 if (ipv6_addr_loopback(&match.key->dst) ||
3979 ipv6_addr_loopback(&match.key->src)) {
3980 dev_err(&adapter->pdev->dev,
3981 "ipv6 addr should not be loopback\n");
3982 return -EINVAL;
3983 }
3984 if (!ipv6_addr_any(&match.mask->dst) ||
3985 !ipv6_addr_any(&match.mask->src))
3986 field_flags |= IAVF_CLOUD_FIELD_IIP;
3987
3988 for (i = 0; i < 4; i++)
3989 vf->mask.tcp_spec.dst_ip[i] |= cpu_to_be32(0xffffffff);
3990 memcpy(&vf->data.tcp_spec.dst_ip, &match.key->dst.s6_addr32,
3991 sizeof(vf->data.tcp_spec.dst_ip));
3992 for (i = 0; i < 4; i++)
3993 vf->mask.tcp_spec.src_ip[i] |= cpu_to_be32(0xffffffff);
3994 memcpy(&vf->data.tcp_spec.src_ip, &match.key->src.s6_addr32,
3995 sizeof(vf->data.tcp_spec.src_ip));
3996 }
3997 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) {
3998 struct flow_match_ports match;
3999
4000 flow_rule_match_ports(rule, &match);
4001 if (match.mask->src) {
4002 if (match.mask->src == cpu_to_be16(0xffff)) {
4003 field_flags |= IAVF_CLOUD_FIELD_IIP;
4004 } else {
4005 dev_err(&adapter->pdev->dev, "Bad src port mask %u\n",
4006 be16_to_cpu(match.mask->src));
4007 return -EINVAL;
4008 }
4009 }
4010
4011 if (match.mask->dst) {
4012 if (match.mask->dst == cpu_to_be16(0xffff)) {
4013 field_flags |= IAVF_CLOUD_FIELD_IIP;
4014 } else {
4015 dev_err(&adapter->pdev->dev, "Bad dst port mask %u\n",
4016 be16_to_cpu(match.mask->dst));
4017 return -EINVAL;
4018 }
4019 }
4020 if (match.key->dst) {
4021 vf->mask.tcp_spec.dst_port |= cpu_to_be16(0xffff);
4022 vf->data.tcp_spec.dst_port = match.key->dst;
4023 }
4024
4025 if (match.key->src) {
4026 vf->mask.tcp_spec.src_port |= cpu_to_be16(0xffff);
4027 vf->data.tcp_spec.src_port = match.key->src;
4028 }
4029 }
4030 vf->field_flags = field_flags;
4031
4032 return 0;
4033 }
4034
4035 /**
4036 * iavf_handle_tclass - Forward to a traffic class on the device
4037 * @adapter: board private structure
4038 * @tc: traffic class index on the device
4039 * @filter: pointer to cloud filter structure
4040 */
iavf_handle_tclass(struct iavf_adapter * adapter,u32 tc,struct iavf_cloud_filter * filter)4041 static int iavf_handle_tclass(struct iavf_adapter *adapter, u32 tc,
4042 struct iavf_cloud_filter *filter)
4043 {
4044 if (tc == 0)
4045 return 0;
4046 if (tc < adapter->num_tc) {
4047 if (!filter->f.data.tcp_spec.dst_port) {
4048 dev_err(&adapter->pdev->dev,
4049 "Specify destination port to redirect to traffic class other than TC0\n");
4050 return -EINVAL;
4051 }
4052 }
4053 /* redirect to a traffic class on the same device */
4054 filter->f.action = VIRTCHNL_ACTION_TC_REDIRECT;
4055 filter->f.action_meta = tc;
4056 return 0;
4057 }
4058
4059 /**
4060 * iavf_find_cf - Find the cloud filter in the list
4061 * @adapter: Board private structure
4062 * @cookie: filter specific cookie
4063 *
4064 * Returns ptr to the filter object or NULL. Must be called while holding the
4065 * cloud_filter_list_lock.
4066 */
iavf_find_cf(struct iavf_adapter * adapter,unsigned long * cookie)4067 static struct iavf_cloud_filter *iavf_find_cf(struct iavf_adapter *adapter,
4068 unsigned long *cookie)
4069 {
4070 struct iavf_cloud_filter *filter = NULL;
4071
4072 if (!cookie)
4073 return NULL;
4074
4075 list_for_each_entry(filter, &adapter->cloud_filter_list, list) {
4076 if (!memcmp(cookie, &filter->cookie, sizeof(filter->cookie)))
4077 return filter;
4078 }
4079 return NULL;
4080 }
4081
4082 /**
4083 * iavf_configure_clsflower - Add tc flower filters
4084 * @adapter: board private structure
4085 * @cls_flower: Pointer to struct flow_cls_offload
4086 */
iavf_configure_clsflower(struct iavf_adapter * adapter,struct flow_cls_offload * cls_flower)4087 static int iavf_configure_clsflower(struct iavf_adapter *adapter,
4088 struct flow_cls_offload *cls_flower)
4089 {
4090 int tc = tc_classid_to_hwtc(adapter->netdev, cls_flower->classid);
4091 struct iavf_cloud_filter *filter;
4092 int err;
4093
4094 if (tc < 0) {
4095 dev_err(&adapter->pdev->dev, "Invalid traffic class\n");
4096 return -EINVAL;
4097 }
4098
4099 filter = kzalloc_obj(*filter);
4100 if (!filter)
4101 return -ENOMEM;
4102 filter->cookie = cls_flower->cookie;
4103
4104 netdev_lock(adapter->netdev);
4105
4106 /* bail out here if filter already exists */
4107 spin_lock_bh(&adapter->cloud_filter_list_lock);
4108 if (iavf_find_cf(adapter, &cls_flower->cookie)) {
4109 dev_err(&adapter->pdev->dev, "Failed to add TC Flower filter, it already exists\n");
4110 err = -EEXIST;
4111 goto spin_unlock;
4112 }
4113 spin_unlock_bh(&adapter->cloud_filter_list_lock);
4114
4115 /* set the mask to all zeroes to begin with */
4116 memset(&filter->f.mask.tcp_spec, 0, sizeof(struct virtchnl_l4_spec));
4117 /* start out with flow type and eth type IPv4 to begin with */
4118 filter->f.flow_type = VIRTCHNL_TCP_V4_FLOW;
4119 err = iavf_parse_cls_flower(adapter, cls_flower, filter);
4120 if (err)
4121 goto err;
4122
4123 err = iavf_handle_tclass(adapter, tc, filter);
4124 if (err)
4125 goto err;
4126
4127 /* add filter to the list */
4128 spin_lock_bh(&adapter->cloud_filter_list_lock);
4129 list_add_tail(&filter->list, &adapter->cloud_filter_list);
4130 adapter->num_cloud_filters++;
4131 filter->add = true;
4132 adapter->aq_required |= IAVF_FLAG_AQ_ADD_CLOUD_FILTER;
4133 spin_unlock:
4134 spin_unlock_bh(&adapter->cloud_filter_list_lock);
4135 err:
4136 if (err)
4137 kfree(filter);
4138
4139 netdev_unlock(adapter->netdev);
4140 return err;
4141 }
4142
4143 /**
4144 * iavf_delete_clsflower - Remove tc flower filters
4145 * @adapter: board private structure
4146 * @cls_flower: Pointer to struct flow_cls_offload
4147 */
iavf_delete_clsflower(struct iavf_adapter * adapter,struct flow_cls_offload * cls_flower)4148 static int iavf_delete_clsflower(struct iavf_adapter *adapter,
4149 struct flow_cls_offload *cls_flower)
4150 {
4151 struct iavf_cloud_filter *filter = NULL;
4152 int err = 0;
4153
4154 spin_lock_bh(&adapter->cloud_filter_list_lock);
4155 filter = iavf_find_cf(adapter, &cls_flower->cookie);
4156 if (filter) {
4157 filter->del = true;
4158 adapter->aq_required |= IAVF_FLAG_AQ_DEL_CLOUD_FILTER;
4159 } else {
4160 err = -EINVAL;
4161 }
4162 spin_unlock_bh(&adapter->cloud_filter_list_lock);
4163
4164 return err;
4165 }
4166
4167 /**
4168 * iavf_setup_tc_cls_flower - flower classifier offloads
4169 * @adapter: pointer to iavf adapter structure
4170 * @cls_flower: pointer to flow_cls_offload struct with flow info
4171 */
iavf_setup_tc_cls_flower(struct iavf_adapter * adapter,struct flow_cls_offload * cls_flower)4172 static int iavf_setup_tc_cls_flower(struct iavf_adapter *adapter,
4173 struct flow_cls_offload *cls_flower)
4174 {
4175 switch (cls_flower->command) {
4176 case FLOW_CLS_REPLACE:
4177 return iavf_configure_clsflower(adapter, cls_flower);
4178 case FLOW_CLS_DESTROY:
4179 return iavf_delete_clsflower(adapter, cls_flower);
4180 case FLOW_CLS_STATS:
4181 return -EOPNOTSUPP;
4182 default:
4183 return -EOPNOTSUPP;
4184 }
4185 }
4186
4187 /**
4188 * iavf_add_cls_u32 - Add U32 classifier offloads
4189 * @adapter: pointer to iavf adapter structure
4190 * @cls_u32: pointer to tc_cls_u32_offload struct with flow info
4191 *
4192 * Return: 0 on success or negative errno on failure.
4193 */
iavf_add_cls_u32(struct iavf_adapter * adapter,struct tc_cls_u32_offload * cls_u32)4194 static int iavf_add_cls_u32(struct iavf_adapter *adapter,
4195 struct tc_cls_u32_offload *cls_u32)
4196 {
4197 struct netlink_ext_ack *extack = cls_u32->common.extack;
4198 struct virtchnl_fdir_rule *rule_cfg;
4199 struct virtchnl_filter_action *vact;
4200 struct virtchnl_proto_hdrs *hdrs;
4201 struct ethhdr *spec_h, *mask_h;
4202 const struct tc_action *act;
4203 struct iavf_fdir_fltr *fltr;
4204 struct tcf_exts *exts;
4205 unsigned int q_index;
4206 int i, status = 0;
4207 int off_base = 0;
4208
4209 if (cls_u32->knode.link_handle) {
4210 NL_SET_ERR_MSG_MOD(extack, "Linking not supported");
4211 return -EOPNOTSUPP;
4212 }
4213
4214 fltr = kzalloc_obj(*fltr);
4215 if (!fltr)
4216 return -ENOMEM;
4217
4218 rule_cfg = &fltr->vc_add_msg.rule_cfg;
4219 hdrs = &rule_cfg->proto_hdrs;
4220 hdrs->count = 0;
4221
4222 /* The parser lib at the PF expects the packet starting with MAC hdr */
4223 switch (ntohs(cls_u32->common.protocol)) {
4224 case ETH_P_802_3:
4225 break;
4226 case ETH_P_IP:
4227 spec_h = (struct ethhdr *)hdrs->raw.spec;
4228 mask_h = (struct ethhdr *)hdrs->raw.mask;
4229 spec_h->h_proto = htons(ETH_P_IP);
4230 mask_h->h_proto = htons(0xFFFF);
4231 off_base += ETH_HLEN;
4232 break;
4233 default:
4234 NL_SET_ERR_MSG_MOD(extack, "Only 802_3 and ip filter protocols are supported");
4235 status = -EOPNOTSUPP;
4236 goto free_alloc;
4237 }
4238
4239 for (i = 0; i < cls_u32->knode.sel->nkeys; i++) {
4240 __be32 val, mask;
4241 int off;
4242
4243 off = off_base + cls_u32->knode.sel->keys[i].off;
4244 val = cls_u32->knode.sel->keys[i].val;
4245 mask = cls_u32->knode.sel->keys[i].mask;
4246
4247 if (off >= sizeof(hdrs->raw.spec)) {
4248 NL_SET_ERR_MSG_MOD(extack, "Input exceeds maximum allowed.");
4249 status = -EINVAL;
4250 goto free_alloc;
4251 }
4252
4253 memcpy(&hdrs->raw.spec[off], &val, sizeof(val));
4254 memcpy(&hdrs->raw.mask[off], &mask, sizeof(mask));
4255 hdrs->raw.pkt_len = off + sizeof(val);
4256 }
4257
4258 /* Only one action is allowed */
4259 rule_cfg->action_set.count = 1;
4260 vact = &rule_cfg->action_set.actions[0];
4261 exts = cls_u32->knode.exts;
4262
4263 tcf_exts_for_each_action(i, act, exts) {
4264 /* FDIR queue */
4265 if (is_tcf_skbedit_rx_queue_mapping(act)) {
4266 q_index = tcf_skbedit_rx_queue_mapping(act);
4267 if (q_index >= adapter->num_active_queues) {
4268 status = -EINVAL;
4269 goto free_alloc;
4270 }
4271
4272 vact->type = VIRTCHNL_ACTION_QUEUE;
4273 vact->act_conf.queue.index = q_index;
4274 break;
4275 }
4276
4277 /* Drop */
4278 if (is_tcf_gact_shot(act)) {
4279 vact->type = VIRTCHNL_ACTION_DROP;
4280 break;
4281 }
4282
4283 /* Unsupported action */
4284 NL_SET_ERR_MSG_MOD(extack, "Unsupported action.");
4285 status = -EOPNOTSUPP;
4286 goto free_alloc;
4287 }
4288
4289 fltr->vc_add_msg.vsi_id = adapter->vsi.id;
4290 fltr->cls_u32_handle = cls_u32->knode.handle;
4291 return iavf_fdir_add_fltr(adapter, fltr);
4292
4293 free_alloc:
4294 kfree(fltr);
4295 return status;
4296 }
4297
4298 /**
4299 * iavf_del_cls_u32 - Delete U32 classifier offloads
4300 * @adapter: pointer to iavf adapter structure
4301 * @cls_u32: pointer to tc_cls_u32_offload struct with flow info
4302 *
4303 * Return: 0 on success or negative errno on failure.
4304 */
iavf_del_cls_u32(struct iavf_adapter * adapter,struct tc_cls_u32_offload * cls_u32)4305 static int iavf_del_cls_u32(struct iavf_adapter *adapter,
4306 struct tc_cls_u32_offload *cls_u32)
4307 {
4308 return iavf_fdir_del_fltr(adapter, true, cls_u32->knode.handle);
4309 }
4310
4311 /**
4312 * iavf_setup_tc_cls_u32 - U32 filter offloads
4313 * @adapter: pointer to iavf adapter structure
4314 * @cls_u32: pointer to tc_cls_u32_offload struct with flow info
4315 *
4316 * Return: 0 on success or negative errno on failure.
4317 */
iavf_setup_tc_cls_u32(struct iavf_adapter * adapter,struct tc_cls_u32_offload * cls_u32)4318 static int iavf_setup_tc_cls_u32(struct iavf_adapter *adapter,
4319 struct tc_cls_u32_offload *cls_u32)
4320 {
4321 if (!TC_U32_SUPPORT(adapter) || !FDIR_FLTR_SUPPORT(adapter))
4322 return -EOPNOTSUPP;
4323
4324 switch (cls_u32->command) {
4325 case TC_CLSU32_NEW_KNODE:
4326 case TC_CLSU32_REPLACE_KNODE:
4327 return iavf_add_cls_u32(adapter, cls_u32);
4328 case TC_CLSU32_DELETE_KNODE:
4329 return iavf_del_cls_u32(adapter, cls_u32);
4330 default:
4331 return -EOPNOTSUPP;
4332 }
4333 }
4334
4335 /**
4336 * iavf_setup_tc_block_cb - block callback for tc
4337 * @type: type of offload
4338 * @type_data: offload data
4339 * @cb_priv:
4340 *
4341 * This function is the block callback for traffic classes
4342 **/
iavf_setup_tc_block_cb(enum tc_setup_type type,void * type_data,void * cb_priv)4343 static int iavf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
4344 void *cb_priv)
4345 {
4346 struct iavf_adapter *adapter = cb_priv;
4347
4348 if (!tc_cls_can_offload_and_chain0(adapter->netdev, type_data))
4349 return -EOPNOTSUPP;
4350
4351 switch (type) {
4352 case TC_SETUP_CLSFLOWER:
4353 return iavf_setup_tc_cls_flower(cb_priv, type_data);
4354 case TC_SETUP_CLSU32:
4355 return iavf_setup_tc_cls_u32(cb_priv, type_data);
4356 default:
4357 return -EOPNOTSUPP;
4358 }
4359 }
4360
4361 static LIST_HEAD(iavf_block_cb_list);
4362
4363 /**
4364 * iavf_setup_tc - configure multiple traffic classes
4365 * @netdev: network interface device structure
4366 * @type: type of offload
4367 * @type_data: tc offload data
4368 *
4369 * This function is the callback to ndo_setup_tc in the
4370 * netdev_ops.
4371 *
4372 * Returns 0 on success
4373 **/
iavf_setup_tc(struct net_device * netdev,enum tc_setup_type type,void * type_data)4374 static int iavf_setup_tc(struct net_device *netdev, enum tc_setup_type type,
4375 void *type_data)
4376 {
4377 struct iavf_adapter *adapter = netdev_priv(netdev);
4378
4379 switch (type) {
4380 case TC_SETUP_QDISC_MQPRIO:
4381 return __iavf_setup_tc(netdev, type_data);
4382 case TC_SETUP_BLOCK:
4383 return flow_block_cb_setup_simple(type_data,
4384 &iavf_block_cb_list,
4385 iavf_setup_tc_block_cb,
4386 adapter, adapter, true);
4387 default:
4388 return -EOPNOTSUPP;
4389 }
4390 }
4391
4392 /**
4393 * iavf_restore_fdir_filters
4394 * @adapter: board private structure
4395 *
4396 * Restore existing FDIR filters when VF netdev comes back up.
4397 **/
iavf_restore_fdir_filters(struct iavf_adapter * adapter)4398 static void iavf_restore_fdir_filters(struct iavf_adapter *adapter)
4399 {
4400 struct iavf_fdir_fltr *f;
4401
4402 spin_lock_bh(&adapter->fdir_fltr_lock);
4403 list_for_each_entry(f, &adapter->fdir_list_head, list) {
4404 if (f->state == IAVF_FDIR_FLTR_DIS_REQUEST) {
4405 /* Cancel a request, keep filter as active */
4406 f->state = IAVF_FDIR_FLTR_ACTIVE;
4407 } else if (f->state == IAVF_FDIR_FLTR_DIS_PENDING ||
4408 f->state == IAVF_FDIR_FLTR_INACTIVE) {
4409 /* Add filters which are inactive or have a pending
4410 * request to PF to be deleted
4411 */
4412 f->state = IAVF_FDIR_FLTR_ADD_REQUEST;
4413 adapter->aq_required |= IAVF_FLAG_AQ_ADD_FDIR_FILTER;
4414 }
4415 }
4416 spin_unlock_bh(&adapter->fdir_fltr_lock);
4417 }
4418
4419 /**
4420 * iavf_open - Called when a network interface is made active
4421 * @netdev: network interface device structure
4422 *
4423 * Returns 0 on success, negative value on failure
4424 *
4425 * The open entry point is called when a network interface is made
4426 * active by the system (IFF_UP). At this point all resources needed
4427 * for transmit and receive operations are allocated, the interrupt
4428 * handler is registered with the OS, the watchdog is started,
4429 * and the stack is notified that the interface is ready.
4430 **/
iavf_open(struct net_device * netdev)4431 static int iavf_open(struct net_device *netdev)
4432 {
4433 struct iavf_adapter *adapter = netdev_priv(netdev);
4434 int err;
4435
4436 netdev_assert_locked(netdev);
4437
4438 if (adapter->flags & IAVF_FLAG_PF_COMMS_FAILED) {
4439 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
4440 return -EIO;
4441 }
4442
4443 if (adapter->state != __IAVF_DOWN)
4444 return -EBUSY;
4445
4446 if (adapter->state == __IAVF_RUNNING &&
4447 !test_bit(__IAVF_VSI_DOWN, adapter->vsi.state)) {
4448 dev_dbg(&adapter->pdev->dev, "VF is already open.\n");
4449 return 0;
4450 }
4451
4452 /* allocate transmit descriptors */
4453 err = iavf_setup_all_tx_resources(adapter);
4454 if (err)
4455 goto err_setup_tx;
4456
4457 /* allocate receive descriptors */
4458 err = iavf_setup_all_rx_resources(adapter);
4459 if (err)
4460 goto err_setup_rx;
4461
4462 /* clear any pending interrupts, may auto mask */
4463 err = iavf_request_traffic_irqs(adapter, netdev->name);
4464 if (err)
4465 goto err_req_irq;
4466
4467 spin_lock_bh(&adapter->mac_vlan_list_lock);
4468 iavf_add_filter(adapter, adapter->hw.mac.addr);
4469 spin_unlock_bh(&adapter->mac_vlan_list_lock);
4470
4471 iavf_restore_fdir_filters(adapter);
4472
4473 iavf_configure(adapter);
4474
4475 iavf_up_complete(adapter);
4476
4477 iavf_irq_enable(adapter, true);
4478
4479 return 0;
4480
4481 err_req_irq:
4482 iavf_down(adapter);
4483 iavf_free_traffic_irqs(adapter);
4484 err_setup_rx:
4485 iavf_free_all_rx_resources(adapter);
4486 err_setup_tx:
4487 iavf_free_all_tx_resources(adapter);
4488
4489 return err;
4490 }
4491
4492 /**
4493 * iavf_close - Disables a network interface
4494 * @netdev: network interface device structure
4495 *
4496 * Returns 0, this is not allowed to fail
4497 *
4498 * The close entry point is called when an interface is de-activated
4499 * by the OS. The hardware is still under the drivers control, but
4500 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
4501 * are freed, along with all transmit and receive resources.
4502 **/
iavf_close(struct net_device * netdev)4503 static int iavf_close(struct net_device *netdev)
4504 {
4505 struct iavf_adapter *adapter = netdev_priv(netdev);
4506 u64 aq_to_restore;
4507 int status;
4508
4509 netdev_assert_locked(netdev);
4510
4511 if (adapter->state <= __IAVF_DOWN_PENDING)
4512 return 0;
4513
4514 set_bit(__IAVF_VSI_DOWN, adapter->vsi.state);
4515 /* We cannot send IAVF_FLAG_AQ_GET_OFFLOAD_VLAN_V2_CAPS before
4516 * IAVF_FLAG_AQ_DISABLE_QUEUES because in such case there is rtnl
4517 * deadlock with adminq_task() until iavf_close timeouts. We must send
4518 * IAVF_FLAG_AQ_GET_CONFIG before IAVF_FLAG_AQ_DISABLE_QUEUES to make
4519 * disable queues possible for vf. Give only necessary flags to
4520 * iavf_down and save other to set them right before iavf_close()
4521 * returns, when IAVF_FLAG_AQ_DISABLE_QUEUES will be already sent and
4522 * iavf will be in DOWN state.
4523 */
4524 aq_to_restore = adapter->aq_required;
4525 adapter->aq_required &= IAVF_FLAG_AQ_GET_CONFIG;
4526
4527 /* Remove flags which we do not want to send after close or we want to
4528 * send before disable queues.
4529 */
4530 aq_to_restore &= ~(IAVF_FLAG_AQ_GET_CONFIG |
4531 IAVF_FLAG_AQ_ENABLE_QUEUES |
4532 IAVF_FLAG_AQ_CONFIGURE_QUEUES |
4533 IAVF_FLAG_AQ_ADD_VLAN_FILTER |
4534 IAVF_FLAG_AQ_ADD_MAC_FILTER |
4535 IAVF_FLAG_AQ_ADD_CLOUD_FILTER |
4536 IAVF_FLAG_AQ_ADD_FDIR_FILTER |
4537 IAVF_FLAG_AQ_ADD_ADV_RSS_CFG);
4538
4539 iavf_down(adapter);
4540 iavf_change_state(adapter, __IAVF_DOWN_PENDING);
4541 iavf_free_traffic_irqs(adapter);
4542
4543 netdev_unlock(netdev);
4544
4545 /* We explicitly don't free resources here because the hardware is
4546 * still active and can DMA into memory. Resources are cleared in
4547 * iavf_virtchnl_completion() after we get confirmation from the PF
4548 * driver that the rings have been stopped.
4549 *
4550 * Also, we wait for state to transition to __IAVF_DOWN before
4551 * returning. State change occurs in iavf_virtchnl_completion() after
4552 * VF resources are released (which occurs after PF driver processes and
4553 * responds to admin queue commands).
4554 */
4555
4556 status = wait_event_timeout(adapter->down_waitqueue,
4557 adapter->state == __IAVF_DOWN,
4558 msecs_to_jiffies(500));
4559 if (!status)
4560 netdev_warn(netdev, "Device resources not yet released\n");
4561 netdev_lock(netdev);
4562
4563 adapter->aq_required |= aq_to_restore;
4564
4565 return 0;
4566 }
4567
4568 /**
4569 * iavf_change_mtu - Change the Maximum Transfer Unit
4570 * @netdev: network interface device structure
4571 * @new_mtu: new value for maximum frame size
4572 *
4573 * Returns 0 on success, negative on failure
4574 **/
iavf_change_mtu(struct net_device * netdev,int new_mtu)4575 static int iavf_change_mtu(struct net_device *netdev, int new_mtu)
4576 {
4577 struct iavf_adapter *adapter = netdev_priv(netdev);
4578
4579 netdev_dbg(netdev, "changing MTU from %d to %d\n",
4580 netdev->mtu, new_mtu);
4581 WRITE_ONCE(netdev->mtu, new_mtu);
4582
4583 if (netif_running(netdev)) {
4584 adapter->flags |= IAVF_FLAG_RESET_NEEDED;
4585 iavf_reset_step(adapter);
4586 }
4587
4588 return 0;
4589 }
4590
4591 /**
4592 * iavf_disable_fdir - disable Flow Director and clear existing filters
4593 * @adapter: board private structure
4594 **/
iavf_disable_fdir(struct iavf_adapter * adapter)4595 static void iavf_disable_fdir(struct iavf_adapter *adapter)
4596 {
4597 struct iavf_fdir_fltr *fdir, *fdirtmp;
4598 bool del_filters = false;
4599
4600 adapter->flags &= ~IAVF_FLAG_FDIR_ENABLED;
4601
4602 /* remove all Flow Director filters */
4603 spin_lock_bh(&adapter->fdir_fltr_lock);
4604 list_for_each_entry_safe(fdir, fdirtmp, &adapter->fdir_list_head,
4605 list) {
4606 if (fdir->state == IAVF_FDIR_FLTR_ADD_REQUEST ||
4607 fdir->state == IAVF_FDIR_FLTR_INACTIVE) {
4608 /* Delete filters not registered in PF */
4609 list_del(&fdir->list);
4610 iavf_dec_fdir_active_fltr(adapter, fdir);
4611 kfree(fdir);
4612 } else if (fdir->state == IAVF_FDIR_FLTR_ADD_PENDING ||
4613 fdir->state == IAVF_FDIR_FLTR_DIS_REQUEST ||
4614 fdir->state == IAVF_FDIR_FLTR_ACTIVE) {
4615 /* Filters registered in PF, schedule their deletion */
4616 fdir->state = IAVF_FDIR_FLTR_DEL_REQUEST;
4617 del_filters = true;
4618 } else if (fdir->state == IAVF_FDIR_FLTR_DIS_PENDING) {
4619 /* Request to delete filter already sent to PF, change
4620 * state to DEL_PENDING to delete filter after PF's
4621 * response, not set as INACTIVE
4622 */
4623 fdir->state = IAVF_FDIR_FLTR_DEL_PENDING;
4624 }
4625 }
4626 spin_unlock_bh(&adapter->fdir_fltr_lock);
4627
4628 if (del_filters) {
4629 adapter->aq_required |= IAVF_FLAG_AQ_DEL_FDIR_FILTER;
4630 mod_delayed_work(adapter->wq, &adapter->watchdog_task, 0);
4631 }
4632 }
4633
4634 #define NETIF_VLAN_OFFLOAD_FEATURES (NETIF_F_HW_VLAN_CTAG_RX | \
4635 NETIF_F_HW_VLAN_CTAG_TX | \
4636 NETIF_F_HW_VLAN_STAG_RX | \
4637 NETIF_F_HW_VLAN_STAG_TX)
4638
4639 /**
4640 * iavf_set_features - set the netdev feature flags
4641 * @netdev: ptr to the netdev being adjusted
4642 * @features: the feature set that the stack is suggesting
4643 * Note: expects to be called while under rtnl_lock()
4644 **/
iavf_set_features(struct net_device * netdev,netdev_features_t features)4645 static int iavf_set_features(struct net_device *netdev,
4646 netdev_features_t features)
4647 {
4648 struct iavf_adapter *adapter = netdev_priv(netdev);
4649
4650 /* trigger update on any VLAN feature change */
4651 if ((netdev->features & NETIF_VLAN_OFFLOAD_FEATURES) ^
4652 (features & NETIF_VLAN_OFFLOAD_FEATURES))
4653 iavf_set_vlan_offload_features(adapter, netdev->features,
4654 features);
4655 if (CRC_OFFLOAD_ALLOWED(adapter) &&
4656 ((netdev->features & NETIF_F_RXFCS) ^ (features & NETIF_F_RXFCS)))
4657 iavf_schedule_reset(adapter, IAVF_FLAG_RESET_NEEDED);
4658
4659 if ((netdev->features & NETIF_F_NTUPLE) ^ (features & NETIF_F_NTUPLE)) {
4660 if (features & NETIF_F_NTUPLE)
4661 adapter->flags |= IAVF_FLAG_FDIR_ENABLED;
4662 else
4663 iavf_disable_fdir(adapter);
4664 }
4665
4666 return 0;
4667 }
4668
4669 /**
4670 * iavf_features_check - Validate encapsulated packet conforms to limits
4671 * @skb: skb buff
4672 * @dev: This physical port's netdev
4673 * @features: Offload features that the stack believes apply
4674 **/
iavf_features_check(struct sk_buff * skb,struct net_device * dev,netdev_features_t features)4675 static netdev_features_t iavf_features_check(struct sk_buff *skb,
4676 struct net_device *dev,
4677 netdev_features_t features)
4678 {
4679 size_t len;
4680
4681 /* No point in doing any of this if neither checksum nor GSO are
4682 * being requested for this frame. We can rule out both by just
4683 * checking for CHECKSUM_PARTIAL
4684 */
4685 if (skb->ip_summed != CHECKSUM_PARTIAL)
4686 return features;
4687
4688 /* We cannot support GSO if the MSS is going to be less than
4689 * 64 bytes. If it is then we need to drop support for GSO.
4690 */
4691 if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_size < 64))
4692 features &= ~NETIF_F_GSO_MASK;
4693
4694 /* MACLEN can support at most 63 words */
4695 len = skb_network_offset(skb);
4696 if (len & ~(63 * 2))
4697 goto out_err;
4698
4699 /* IPLEN and EIPLEN can support at most 127 dwords */
4700 len = skb_network_header_len(skb);
4701 if (len & ~(127 * 4))
4702 goto out_err;
4703
4704 if (skb->encapsulation) {
4705 /* L4TUNLEN can support 127 words */
4706 len = skb_inner_network_header(skb) - skb_transport_header(skb);
4707 if (len & ~(127 * 2))
4708 goto out_err;
4709
4710 /* IPLEN can support at most 127 dwords */
4711 len = skb_inner_transport_header(skb) -
4712 skb_inner_network_header(skb);
4713 if (len & ~(127 * 4))
4714 goto out_err;
4715 }
4716
4717 /* No need to validate L4LEN as TCP is the only protocol with a
4718 * flexible value and we support all possible values supported
4719 * by TCP, which is at most 15 dwords
4720 */
4721
4722 return features;
4723 out_err:
4724 return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
4725 }
4726
4727 /**
4728 * iavf_get_netdev_vlan_hw_features - get NETDEV VLAN features that can toggle on/off
4729 * @adapter: board private structure
4730 *
4731 * Depending on whether VIRTHCNL_VF_OFFLOAD_VLAN or VIRTCHNL_VF_OFFLOAD_VLAN_V2
4732 * were negotiated determine the VLAN features that can be toggled on and off.
4733 **/
4734 static netdev_features_t
iavf_get_netdev_vlan_hw_features(struct iavf_adapter * adapter)4735 iavf_get_netdev_vlan_hw_features(struct iavf_adapter *adapter)
4736 {
4737 netdev_features_t hw_features = 0;
4738
4739 if (!adapter->vf_res || !adapter->vf_res->vf_cap_flags)
4740 return hw_features;
4741
4742 /* Enable VLAN features if supported */
4743 if (VLAN_ALLOWED(adapter)) {
4744 hw_features |= (NETIF_F_HW_VLAN_CTAG_TX |
4745 NETIF_F_HW_VLAN_CTAG_RX);
4746 } else if (VLAN_V2_ALLOWED(adapter)) {
4747 struct virtchnl_vlan_caps *vlan_v2_caps =
4748 &adapter->vlan_v2_caps;
4749 struct virtchnl_vlan_supported_caps *stripping_support =
4750 &vlan_v2_caps->offloads.stripping_support;
4751 struct virtchnl_vlan_supported_caps *insertion_support =
4752 &vlan_v2_caps->offloads.insertion_support;
4753
4754 if (stripping_support->outer != VIRTCHNL_VLAN_UNSUPPORTED &&
4755 stripping_support->outer & VIRTCHNL_VLAN_TOGGLE) {
4756 if (stripping_support->outer &
4757 VIRTCHNL_VLAN_ETHERTYPE_8100)
4758 hw_features |= NETIF_F_HW_VLAN_CTAG_RX;
4759 if (stripping_support->outer &
4760 VIRTCHNL_VLAN_ETHERTYPE_88A8)
4761 hw_features |= NETIF_F_HW_VLAN_STAG_RX;
4762 } else if (stripping_support->inner !=
4763 VIRTCHNL_VLAN_UNSUPPORTED &&
4764 stripping_support->inner & VIRTCHNL_VLAN_TOGGLE) {
4765 if (stripping_support->inner &
4766 VIRTCHNL_VLAN_ETHERTYPE_8100)
4767 hw_features |= NETIF_F_HW_VLAN_CTAG_RX;
4768 }
4769
4770 if (insertion_support->outer != VIRTCHNL_VLAN_UNSUPPORTED &&
4771 insertion_support->outer & VIRTCHNL_VLAN_TOGGLE) {
4772 if (insertion_support->outer &
4773 VIRTCHNL_VLAN_ETHERTYPE_8100)
4774 hw_features |= NETIF_F_HW_VLAN_CTAG_TX;
4775 if (insertion_support->outer &
4776 VIRTCHNL_VLAN_ETHERTYPE_88A8)
4777 hw_features |= NETIF_F_HW_VLAN_STAG_TX;
4778 } else if (insertion_support->inner &&
4779 insertion_support->inner & VIRTCHNL_VLAN_TOGGLE) {
4780 if (insertion_support->inner &
4781 VIRTCHNL_VLAN_ETHERTYPE_8100)
4782 hw_features |= NETIF_F_HW_VLAN_CTAG_TX;
4783 }
4784 }
4785
4786 if (CRC_OFFLOAD_ALLOWED(adapter))
4787 hw_features |= NETIF_F_RXFCS;
4788
4789 return hw_features;
4790 }
4791
4792 /**
4793 * iavf_get_netdev_vlan_features - get the enabled NETDEV VLAN fetures
4794 * @adapter: board private structure
4795 *
4796 * Depending on whether VIRTHCNL_VF_OFFLOAD_VLAN or VIRTCHNL_VF_OFFLOAD_VLAN_V2
4797 * were negotiated determine the VLAN features that are enabled by default.
4798 **/
4799 static netdev_features_t
iavf_get_netdev_vlan_features(struct iavf_adapter * adapter)4800 iavf_get_netdev_vlan_features(struct iavf_adapter *adapter)
4801 {
4802 netdev_features_t features = 0;
4803
4804 if (!adapter->vf_res || !adapter->vf_res->vf_cap_flags)
4805 return features;
4806
4807 if (VLAN_ALLOWED(adapter)) {
4808 features |= NETIF_F_HW_VLAN_CTAG_FILTER |
4809 NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_TX;
4810 } else if (VLAN_V2_ALLOWED(adapter)) {
4811 struct virtchnl_vlan_caps *vlan_v2_caps =
4812 &adapter->vlan_v2_caps;
4813 struct virtchnl_vlan_supported_caps *filtering_support =
4814 &vlan_v2_caps->filtering.filtering_support;
4815 struct virtchnl_vlan_supported_caps *stripping_support =
4816 &vlan_v2_caps->offloads.stripping_support;
4817 struct virtchnl_vlan_supported_caps *insertion_support =
4818 &vlan_v2_caps->offloads.insertion_support;
4819 u32 ethertype_init;
4820
4821 /* give priority to outer stripping and don't support both outer
4822 * and inner stripping
4823 */
4824 ethertype_init = vlan_v2_caps->offloads.ethertype_init;
4825 if (stripping_support->outer != VIRTCHNL_VLAN_UNSUPPORTED) {
4826 if (stripping_support->outer &
4827 VIRTCHNL_VLAN_ETHERTYPE_8100 &&
4828 ethertype_init & VIRTCHNL_VLAN_ETHERTYPE_8100)
4829 features |= NETIF_F_HW_VLAN_CTAG_RX;
4830 else if (stripping_support->outer &
4831 VIRTCHNL_VLAN_ETHERTYPE_88A8 &&
4832 ethertype_init & VIRTCHNL_VLAN_ETHERTYPE_88A8)
4833 features |= NETIF_F_HW_VLAN_STAG_RX;
4834 } else if (stripping_support->inner !=
4835 VIRTCHNL_VLAN_UNSUPPORTED) {
4836 if (stripping_support->inner &
4837 VIRTCHNL_VLAN_ETHERTYPE_8100 &&
4838 ethertype_init & VIRTCHNL_VLAN_ETHERTYPE_8100)
4839 features |= NETIF_F_HW_VLAN_CTAG_RX;
4840 }
4841
4842 /* give priority to outer insertion and don't support both outer
4843 * and inner insertion
4844 */
4845 if (insertion_support->outer != VIRTCHNL_VLAN_UNSUPPORTED) {
4846 if (insertion_support->outer &
4847 VIRTCHNL_VLAN_ETHERTYPE_8100 &&
4848 ethertype_init & VIRTCHNL_VLAN_ETHERTYPE_8100)
4849 features |= NETIF_F_HW_VLAN_CTAG_TX;
4850 else if (insertion_support->outer &
4851 VIRTCHNL_VLAN_ETHERTYPE_88A8 &&
4852 ethertype_init & VIRTCHNL_VLAN_ETHERTYPE_88A8)
4853 features |= NETIF_F_HW_VLAN_STAG_TX;
4854 } else if (insertion_support->inner !=
4855 VIRTCHNL_VLAN_UNSUPPORTED) {
4856 if (insertion_support->inner &
4857 VIRTCHNL_VLAN_ETHERTYPE_8100 &&
4858 ethertype_init & VIRTCHNL_VLAN_ETHERTYPE_8100)
4859 features |= NETIF_F_HW_VLAN_CTAG_TX;
4860 }
4861
4862 /* give priority to outer filtering and don't bother if both
4863 * outer and inner filtering are enabled
4864 */
4865 ethertype_init = vlan_v2_caps->filtering.ethertype_init;
4866 if (filtering_support->outer != VIRTCHNL_VLAN_UNSUPPORTED) {
4867 if (filtering_support->outer &
4868 VIRTCHNL_VLAN_ETHERTYPE_8100 &&
4869 ethertype_init & VIRTCHNL_VLAN_ETHERTYPE_8100)
4870 features |= NETIF_F_HW_VLAN_CTAG_FILTER;
4871 if (filtering_support->outer &
4872 VIRTCHNL_VLAN_ETHERTYPE_88A8 &&
4873 ethertype_init & VIRTCHNL_VLAN_ETHERTYPE_88A8)
4874 features |= NETIF_F_HW_VLAN_STAG_FILTER;
4875 } else if (filtering_support->inner !=
4876 VIRTCHNL_VLAN_UNSUPPORTED) {
4877 if (filtering_support->inner &
4878 VIRTCHNL_VLAN_ETHERTYPE_8100 &&
4879 ethertype_init & VIRTCHNL_VLAN_ETHERTYPE_8100)
4880 features |= NETIF_F_HW_VLAN_CTAG_FILTER;
4881 if (filtering_support->inner &
4882 VIRTCHNL_VLAN_ETHERTYPE_88A8 &&
4883 ethertype_init & VIRTCHNL_VLAN_ETHERTYPE_88A8)
4884 features |= NETIF_F_HW_VLAN_STAG_FILTER;
4885 }
4886 }
4887
4888 return features;
4889 }
4890
4891 #define IAVF_NETDEV_VLAN_FEATURE_ALLOWED(requested, allowed, feature_bit) \
4892 (!(((requested) & (feature_bit)) && \
4893 !((allowed) & (feature_bit))))
4894
4895 /**
4896 * iavf_fix_netdev_vlan_features - fix NETDEV VLAN features based on support
4897 * @adapter: board private structure
4898 * @requested_features: stack requested NETDEV features
4899 **/
4900 static netdev_features_t
iavf_fix_netdev_vlan_features(struct iavf_adapter * adapter,netdev_features_t requested_features)4901 iavf_fix_netdev_vlan_features(struct iavf_adapter *adapter,
4902 netdev_features_t requested_features)
4903 {
4904 netdev_features_t allowed_features;
4905
4906 allowed_features = iavf_get_netdev_vlan_hw_features(adapter) |
4907 iavf_get_netdev_vlan_features(adapter);
4908
4909 if (!IAVF_NETDEV_VLAN_FEATURE_ALLOWED(requested_features,
4910 allowed_features,
4911 NETIF_F_HW_VLAN_CTAG_TX))
4912 requested_features &= ~NETIF_F_HW_VLAN_CTAG_TX;
4913
4914 if (!IAVF_NETDEV_VLAN_FEATURE_ALLOWED(requested_features,
4915 allowed_features,
4916 NETIF_F_HW_VLAN_CTAG_RX))
4917 requested_features &= ~NETIF_F_HW_VLAN_CTAG_RX;
4918
4919 if (!IAVF_NETDEV_VLAN_FEATURE_ALLOWED(requested_features,
4920 allowed_features,
4921 NETIF_F_HW_VLAN_STAG_TX))
4922 requested_features &= ~NETIF_F_HW_VLAN_STAG_TX;
4923 if (!IAVF_NETDEV_VLAN_FEATURE_ALLOWED(requested_features,
4924 allowed_features,
4925 NETIF_F_HW_VLAN_STAG_RX))
4926 requested_features &= ~NETIF_F_HW_VLAN_STAG_RX;
4927
4928 if (!IAVF_NETDEV_VLAN_FEATURE_ALLOWED(requested_features,
4929 allowed_features,
4930 NETIF_F_HW_VLAN_CTAG_FILTER))
4931 requested_features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
4932
4933 if (!IAVF_NETDEV_VLAN_FEATURE_ALLOWED(requested_features,
4934 allowed_features,
4935 NETIF_F_HW_VLAN_STAG_FILTER))
4936 requested_features &= ~NETIF_F_HW_VLAN_STAG_FILTER;
4937
4938 if ((requested_features &
4939 (NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_TX)) &&
4940 (requested_features &
4941 (NETIF_F_HW_VLAN_STAG_RX | NETIF_F_HW_VLAN_STAG_TX)) &&
4942 adapter->vlan_v2_caps.offloads.ethertype_match ==
4943 VIRTCHNL_ETHERTYPE_STRIPPING_MATCHES_INSERTION) {
4944 netdev_warn(adapter->netdev, "cannot support CTAG and STAG VLAN stripping and/or insertion simultaneously since CTAG and STAG offloads are mutually exclusive, clearing STAG offload settings\n");
4945 requested_features &= ~(NETIF_F_HW_VLAN_STAG_RX |
4946 NETIF_F_HW_VLAN_STAG_TX);
4947 }
4948
4949 return requested_features;
4950 }
4951
4952 /**
4953 * iavf_fix_strip_features - fix NETDEV CRC and VLAN strip features
4954 * @adapter: board private structure
4955 * @requested_features: stack requested NETDEV features
4956 *
4957 * Returns fixed-up features bits
4958 **/
4959 static netdev_features_t
iavf_fix_strip_features(struct iavf_adapter * adapter,netdev_features_t requested_features)4960 iavf_fix_strip_features(struct iavf_adapter *adapter,
4961 netdev_features_t requested_features)
4962 {
4963 struct net_device *netdev = adapter->netdev;
4964 bool crc_offload_req, is_vlan_strip;
4965 netdev_features_t vlan_strip;
4966 int num_non_zero_vlan;
4967
4968 crc_offload_req = CRC_OFFLOAD_ALLOWED(adapter) &&
4969 (requested_features & NETIF_F_RXFCS);
4970 num_non_zero_vlan = iavf_get_num_vlans_added(adapter);
4971 vlan_strip = (NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_STAG_RX);
4972 is_vlan_strip = requested_features & vlan_strip;
4973
4974 if (!crc_offload_req)
4975 return requested_features;
4976
4977 if (!num_non_zero_vlan && (netdev->features & vlan_strip) &&
4978 !(netdev->features & NETIF_F_RXFCS) && is_vlan_strip) {
4979 requested_features &= ~vlan_strip;
4980 netdev_info(netdev, "Disabling VLAN stripping as FCS/CRC stripping is also disabled and there is no VLAN configured\n");
4981 return requested_features;
4982 }
4983
4984 if ((netdev->features & NETIF_F_RXFCS) && is_vlan_strip) {
4985 requested_features &= ~vlan_strip;
4986 if (!(netdev->features & vlan_strip))
4987 netdev_info(netdev, "To enable VLAN stripping, first need to enable FCS/CRC stripping");
4988
4989 return requested_features;
4990 }
4991
4992 if (num_non_zero_vlan && is_vlan_strip &&
4993 !(netdev->features & NETIF_F_RXFCS)) {
4994 requested_features &= ~NETIF_F_RXFCS;
4995 netdev_info(netdev, "To disable FCS/CRC stripping, first need to disable VLAN stripping");
4996 }
4997
4998 return requested_features;
4999 }
5000
5001 /**
5002 * iavf_fix_features - fix up the netdev feature bits
5003 * @netdev: our net device
5004 * @features: desired feature bits
5005 *
5006 * Returns fixed-up features bits
5007 **/
iavf_fix_features(struct net_device * netdev,netdev_features_t features)5008 static netdev_features_t iavf_fix_features(struct net_device *netdev,
5009 netdev_features_t features)
5010 {
5011 struct iavf_adapter *adapter = netdev_priv(netdev);
5012
5013 features = iavf_fix_netdev_vlan_features(adapter, features);
5014
5015 if (!FDIR_FLTR_SUPPORT(adapter))
5016 features &= ~NETIF_F_NTUPLE;
5017
5018 return iavf_fix_strip_features(adapter, features);
5019 }
5020
iavf_hwstamp_get(struct net_device * netdev,struct kernel_hwtstamp_config * config)5021 static int iavf_hwstamp_get(struct net_device *netdev,
5022 struct kernel_hwtstamp_config *config)
5023 {
5024 struct iavf_adapter *adapter = netdev_priv(netdev);
5025
5026 *config = adapter->ptp.hwtstamp_config;
5027
5028 return 0;
5029 }
5030
iavf_hwstamp_set(struct net_device * netdev,struct kernel_hwtstamp_config * config,struct netlink_ext_ack * extack)5031 static int iavf_hwstamp_set(struct net_device *netdev,
5032 struct kernel_hwtstamp_config *config,
5033 struct netlink_ext_ack *extack)
5034 {
5035 struct iavf_adapter *adapter = netdev_priv(netdev);
5036
5037 return iavf_ptp_set_ts_config(adapter, config, extack);
5038 }
5039
5040 static int
iavf_verify_shaper(struct net_shaper_binding * binding,const struct net_shaper * shaper,struct netlink_ext_ack * extack)5041 iavf_verify_shaper(struct net_shaper_binding *binding,
5042 const struct net_shaper *shaper,
5043 struct netlink_ext_ack *extack)
5044 {
5045 struct iavf_adapter *adapter = netdev_priv(binding->netdev);
5046 u64 vf_max;
5047
5048 if (shaper->handle.scope == NET_SHAPER_SCOPE_QUEUE) {
5049 vf_max = adapter->qos_caps->cap[0].shaper.peak;
5050 if (vf_max && shaper->bw_max > vf_max) {
5051 NL_SET_ERR_MSG_FMT(extack, "Max rate (%llu) of queue %d can't exceed max TX rate of VF (%llu kbps)",
5052 shaper->bw_max, shaper->handle.id,
5053 vf_max);
5054 return -EINVAL;
5055 }
5056 }
5057 return 0;
5058 }
5059
5060 static int
iavf_shaper_set(struct net_shaper_binding * binding,const struct net_shaper * shaper,struct netlink_ext_ack * extack)5061 iavf_shaper_set(struct net_shaper_binding *binding,
5062 const struct net_shaper *shaper,
5063 struct netlink_ext_ack *extack)
5064 {
5065 struct iavf_adapter *adapter = netdev_priv(binding->netdev);
5066 const struct net_shaper_handle *handle = &shaper->handle;
5067 struct iavf_ring *tx_ring;
5068 int ret;
5069
5070 netdev_assert_locked(adapter->netdev);
5071
5072 if (handle->id >= adapter->num_active_queues)
5073 return 0;
5074
5075 ret = iavf_verify_shaper(binding, shaper, extack);
5076 if (ret)
5077 return ret;
5078
5079 tx_ring = &adapter->tx_rings[handle->id];
5080
5081 tx_ring->q_shaper.bw_min = div_u64(shaper->bw_min, 1000);
5082 tx_ring->q_shaper.bw_max = div_u64(shaper->bw_max, 1000);
5083 tx_ring->q_shaper_update = true;
5084
5085 adapter->aq_required |= IAVF_FLAG_AQ_CONFIGURE_QUEUES_BW;
5086
5087 return 0;
5088 }
5089
iavf_shaper_del(struct net_shaper_binding * binding,const struct net_shaper_handle * handle,struct netlink_ext_ack * extack)5090 static int iavf_shaper_del(struct net_shaper_binding *binding,
5091 const struct net_shaper_handle *handle,
5092 struct netlink_ext_ack *extack)
5093 {
5094 struct iavf_adapter *adapter = netdev_priv(binding->netdev);
5095 struct iavf_ring *tx_ring;
5096
5097 netdev_assert_locked(adapter->netdev);
5098
5099 if (handle->id >= adapter->num_active_queues)
5100 return 0;
5101
5102 tx_ring = &adapter->tx_rings[handle->id];
5103 tx_ring->q_shaper.bw_min = 0;
5104 tx_ring->q_shaper.bw_max = 0;
5105 tx_ring->q_shaper_update = true;
5106
5107 adapter->aq_required |= IAVF_FLAG_AQ_CONFIGURE_QUEUES_BW;
5108
5109 return 0;
5110 }
5111
iavf_shaper_cap(struct net_shaper_binding * binding,enum net_shaper_scope scope,unsigned long * flags)5112 static void iavf_shaper_cap(struct net_shaper_binding *binding,
5113 enum net_shaper_scope scope,
5114 unsigned long *flags)
5115 {
5116 if (scope != NET_SHAPER_SCOPE_QUEUE)
5117 return;
5118
5119 *flags = BIT(NET_SHAPER_A_CAPS_SUPPORT_BW_MIN) |
5120 BIT(NET_SHAPER_A_CAPS_SUPPORT_BW_MAX) |
5121 BIT(NET_SHAPER_A_CAPS_SUPPORT_METRIC_BPS);
5122 }
5123
5124 static const struct net_shaper_ops iavf_shaper_ops = {
5125 .set = iavf_shaper_set,
5126 .delete = iavf_shaper_del,
5127 .capabilities = iavf_shaper_cap,
5128 };
5129
5130 static const struct net_device_ops iavf_netdev_ops = {
5131 .ndo_open = iavf_open,
5132 .ndo_stop = iavf_close,
5133 .ndo_start_xmit = iavf_xmit_frame,
5134 .ndo_set_rx_mode_async = iavf_set_rx_mode,
5135 .ndo_validate_addr = eth_validate_addr,
5136 .ndo_set_mac_address = iavf_set_mac,
5137 .ndo_change_mtu = iavf_change_mtu,
5138 .ndo_tx_timeout = iavf_tx_timeout,
5139 .ndo_vlan_rx_add_vid = iavf_vlan_rx_add_vid,
5140 .ndo_vlan_rx_kill_vid = iavf_vlan_rx_kill_vid,
5141 .ndo_features_check = iavf_features_check,
5142 .ndo_fix_features = iavf_fix_features,
5143 .ndo_set_features = iavf_set_features,
5144 .ndo_setup_tc = iavf_setup_tc,
5145 .net_shaper_ops = &iavf_shaper_ops,
5146 .ndo_hwtstamp_get = iavf_hwstamp_get,
5147 .ndo_hwtstamp_set = iavf_hwstamp_set,
5148 };
5149
5150 /**
5151 * iavf_check_reset_complete - check that VF reset is complete
5152 * @hw: pointer to hw struct
5153 *
5154 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
5155 **/
iavf_check_reset_complete(struct iavf_hw * hw)5156 static int iavf_check_reset_complete(struct iavf_hw *hw)
5157 {
5158 u32 rstat;
5159 int i;
5160
5161 for (i = 0; i < IAVF_RESET_WAIT_COMPLETE_COUNT; i++) {
5162 rstat = rd32(hw, IAVF_VFGEN_RSTAT) &
5163 IAVF_VFGEN_RSTAT_VFR_STATE_MASK;
5164 if ((rstat == VIRTCHNL_VFR_VFACTIVE) ||
5165 (rstat == VIRTCHNL_VFR_COMPLETED))
5166 return 0;
5167 msleep(IAVF_RESET_WAIT_MS);
5168 }
5169 return -EBUSY;
5170 }
5171
5172 /**
5173 * iavf_process_config - Process the config information we got from the PF
5174 * @adapter: board private structure
5175 *
5176 * Verify that we have a valid config struct, and set up our netdev features
5177 * and our VSI struct.
5178 **/
iavf_process_config(struct iavf_adapter * adapter)5179 int iavf_process_config(struct iavf_adapter *adapter)
5180 {
5181 struct virtchnl_vf_resource *vfres = adapter->vf_res;
5182 netdev_features_t hw_vlan_features, vlan_features;
5183 struct net_device *netdev = adapter->netdev;
5184 netdev_features_t hw_enc_features;
5185 netdev_features_t hw_features;
5186
5187 hw_enc_features = NETIF_F_SG |
5188 NETIF_F_IP_CSUM |
5189 NETIF_F_IPV6_CSUM |
5190 NETIF_F_HIGHDMA |
5191 NETIF_F_SOFT_FEATURES |
5192 NETIF_F_TSO |
5193 NETIF_F_TSO_ECN |
5194 NETIF_F_TSO6 |
5195 NETIF_F_SCTP_CRC |
5196 NETIF_F_RXHASH |
5197 NETIF_F_RXCSUM |
5198 0;
5199
5200 /* advertise to stack only if offloads for encapsulated packets is
5201 * supported
5202 */
5203 if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ENCAP) {
5204 hw_enc_features |= NETIF_F_GSO_UDP_TUNNEL |
5205 NETIF_F_GSO_GRE |
5206 NETIF_F_GSO_GRE_CSUM |
5207 NETIF_F_GSO_IPXIP4 |
5208 NETIF_F_GSO_IPXIP6 |
5209 NETIF_F_GSO_UDP_TUNNEL_CSUM |
5210 NETIF_F_GSO_PARTIAL |
5211 0;
5212
5213 if (!(vfres->vf_cap_flags &
5214 VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM))
5215 netdev->gso_partial_features |=
5216 NETIF_F_GSO_UDP_TUNNEL_CSUM;
5217
5218 netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
5219 netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
5220 netdev->hw_enc_features |= hw_enc_features;
5221 }
5222 /* record features VLANs can make use of */
5223 netdev->vlan_features |= hw_enc_features | NETIF_F_TSO_MANGLEID;
5224
5225 /* Write features and hw_features separately to avoid polluting
5226 * with, or dropping, features that are set when we registered.
5227 */
5228 hw_features = hw_enc_features;
5229
5230 /* get HW VLAN features that can be toggled */
5231 hw_vlan_features = iavf_get_netdev_vlan_hw_features(adapter);
5232
5233 /* Enable HW TC offload if ADQ or tc U32 is supported */
5234 if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ ||
5235 TC_U32_SUPPORT(adapter))
5236 hw_features |= NETIF_F_HW_TC;
5237
5238 if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_USO)
5239 hw_features |= NETIF_F_GSO_UDP_L4;
5240
5241 netdev->hw_features |= hw_features | hw_vlan_features;
5242 vlan_features = iavf_get_netdev_vlan_features(adapter);
5243
5244 netdev->features |= hw_features | vlan_features;
5245
5246 if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_VLAN)
5247 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
5248
5249 if (FDIR_FLTR_SUPPORT(adapter)) {
5250 netdev->hw_features |= NETIF_F_NTUPLE;
5251 netdev->features |= NETIF_F_NTUPLE;
5252 adapter->flags |= IAVF_FLAG_FDIR_ENABLED;
5253 }
5254
5255 netdev->priv_flags |= IFF_UNICAST_FLT;
5256
5257 /* Do not turn on offloads when they are requested to be turned off.
5258 * TSO needs minimum 576 bytes to work correctly.
5259 */
5260 if (netdev->wanted_features) {
5261 if (!(netdev->wanted_features & NETIF_F_TSO) ||
5262 netdev->mtu < 576)
5263 netdev->features &= ~NETIF_F_TSO;
5264 if (!(netdev->wanted_features & NETIF_F_TSO6) ||
5265 netdev->mtu < 576)
5266 netdev->features &= ~NETIF_F_TSO6;
5267 if (!(netdev->wanted_features & NETIF_F_TSO_ECN))
5268 netdev->features &= ~NETIF_F_TSO_ECN;
5269 if (!(netdev->wanted_features & NETIF_F_GRO))
5270 netdev->features &= ~NETIF_F_GRO;
5271 if (!(netdev->wanted_features & NETIF_F_GSO))
5272 netdev->features &= ~NETIF_F_GSO;
5273 }
5274
5275 return 0;
5276 }
5277
5278 /**
5279 * iavf_probe - Device Initialization Routine
5280 * @pdev: PCI device information struct
5281 * @ent: entry in iavf_pci_tbl
5282 *
5283 * Returns 0 on success, negative on failure
5284 *
5285 * iavf_probe initializes an adapter identified by a pci_dev structure.
5286 * The OS initialization, configuring of the adapter private structure,
5287 * and a hardware reset occur.
5288 **/
iavf_probe(struct pci_dev * pdev,const struct pci_device_id * ent)5289 static int iavf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
5290 {
5291 struct net_device *netdev;
5292 struct iavf_adapter *adapter = NULL;
5293 struct iavf_hw *hw = NULL;
5294 int err, len;
5295
5296 err = pci_enable_device(pdev);
5297 if (err)
5298 return err;
5299
5300 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
5301 if (err) {
5302 dev_err(&pdev->dev,
5303 "DMA configuration failed: 0x%x\n", err);
5304 goto err_dma;
5305 }
5306
5307 err = pci_request_regions(pdev, iavf_driver_name);
5308 if (err) {
5309 dev_err(&pdev->dev,
5310 "pci_request_regions failed 0x%x\n", err);
5311 goto err_pci_reg;
5312 }
5313
5314 pci_set_master(pdev);
5315
5316 netdev = alloc_etherdev_mq(sizeof(struct iavf_adapter),
5317 IAVF_MAX_REQ_QUEUES);
5318 if (!netdev) {
5319 err = -ENOMEM;
5320 goto err_alloc_etherdev;
5321 }
5322
5323 netif_set_affinity_auto(netdev);
5324 SET_NETDEV_DEV(netdev, &pdev->dev);
5325
5326 pci_set_drvdata(pdev, netdev);
5327 adapter = netdev_priv(netdev);
5328
5329 adapter->netdev = netdev;
5330 adapter->pdev = pdev;
5331
5332 hw = &adapter->hw;
5333 hw->back = adapter;
5334
5335 adapter->wq = alloc_ordered_workqueue("%s", WQ_MEM_RECLAIM,
5336 iavf_driver_name);
5337 if (!adapter->wq) {
5338 err = -ENOMEM;
5339 goto err_alloc_wq;
5340 }
5341
5342 adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
5343 iavf_change_state(adapter, __IAVF_STARTUP);
5344
5345 /* Call save state here because it relies on the adapter struct. */
5346 pci_save_state(pdev);
5347
5348 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
5349 pci_resource_len(pdev, 0));
5350 if (!hw->hw_addr) {
5351 err = -EIO;
5352 goto err_ioremap;
5353 }
5354 hw->vendor_id = pdev->vendor;
5355 hw->device_id = pdev->device;
5356 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
5357 hw->subsystem_vendor_id = pdev->subsystem_vendor;
5358 hw->subsystem_device_id = pdev->subsystem_device;
5359 hw->bus.device = PCI_SLOT(pdev->devfn);
5360 hw->bus.func = PCI_FUNC(pdev->devfn);
5361 hw->bus.bus_id = pdev->bus->number;
5362
5363 len = struct_size(adapter->qos_caps, cap, IAVF_MAX_QOS_TC_NUM);
5364 adapter->qos_caps = kzalloc(len, GFP_KERNEL);
5365 if (!adapter->qos_caps) {
5366 err = -ENOMEM;
5367 goto err_alloc_qos_cap;
5368 }
5369
5370 mutex_init(&hw->aq.asq_mutex);
5371 mutex_init(&hw->aq.arq_mutex);
5372
5373 spin_lock_init(&adapter->mac_vlan_list_lock);
5374 spin_lock_init(&adapter->cloud_filter_list_lock);
5375 spin_lock_init(&adapter->fdir_fltr_lock);
5376 spin_lock_init(&adapter->adv_rss_lock);
5377 spin_lock_init(&adapter->current_netdev_promisc_flags_lock);
5378
5379 INIT_LIST_HEAD(&adapter->mac_filter_list);
5380 INIT_LIST_HEAD(&adapter->vlan_filter_list);
5381 INIT_LIST_HEAD(&adapter->cloud_filter_list);
5382 INIT_LIST_HEAD(&adapter->fdir_list_head);
5383 INIT_LIST_HEAD(&adapter->adv_rss_list_head);
5384
5385 INIT_WORK(&adapter->reset_task, iavf_reset_task);
5386 INIT_WORK(&adapter->adminq_task, iavf_adminq_task);
5387 INIT_WORK(&adapter->finish_config, iavf_finish_config);
5388 INIT_DELAYED_WORK(&adapter->watchdog_task, iavf_watchdog_task);
5389
5390 /* Setup the wait queue for indicating transition to down status */
5391 init_waitqueue_head(&adapter->down_waitqueue);
5392
5393 /* Setup the wait queue for indicating virtchannel events */
5394 init_waitqueue_head(&adapter->vc_waitqueue);
5395
5396 INIT_LIST_HEAD(&adapter->ptp.aq_cmds);
5397 init_waitqueue_head(&adapter->ptp.phc_time_waitqueue);
5398 mutex_init(&adapter->ptp.aq_cmd_lock);
5399
5400 queue_delayed_work(adapter->wq, &adapter->watchdog_task,
5401 msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
5402 /* Initialization goes on in the work. Do not add more of it below. */
5403 return 0;
5404
5405 err_alloc_qos_cap:
5406 iounmap(hw->hw_addr);
5407 err_ioremap:
5408 destroy_workqueue(adapter->wq);
5409 err_alloc_wq:
5410 free_netdev(netdev);
5411 err_alloc_etherdev:
5412 pci_release_regions(pdev);
5413 err_pci_reg:
5414 err_dma:
5415 pci_disable_device(pdev);
5416 return err;
5417 }
5418
5419 /**
5420 * iavf_suspend - Power management suspend routine
5421 * @dev_d: device info pointer
5422 *
5423 * Called when the system (VM) is entering sleep/suspend.
5424 **/
iavf_suspend(struct device * dev_d)5425 static int iavf_suspend(struct device *dev_d)
5426 {
5427 struct net_device *netdev = dev_get_drvdata(dev_d);
5428 struct iavf_adapter *adapter = netdev_priv(netdev);
5429 bool running;
5430
5431 netif_device_detach(netdev);
5432
5433 running = netif_running(netdev);
5434 if (running)
5435 rtnl_lock();
5436 netdev_lock(netdev);
5437
5438 if (running)
5439 iavf_down(adapter);
5440
5441 iavf_free_misc_irq(adapter);
5442 iavf_reset_interrupt_capability(adapter);
5443
5444 netdev_unlock(netdev);
5445 if (running)
5446 rtnl_unlock();
5447
5448 return 0;
5449 }
5450
5451 /**
5452 * iavf_resume - Power management resume routine
5453 * @dev_d: device info pointer
5454 *
5455 * Called when the system (VM) is resumed from sleep/suspend.
5456 **/
iavf_resume(struct device * dev_d)5457 static int iavf_resume(struct device *dev_d)
5458 {
5459 struct pci_dev *pdev = to_pci_dev(dev_d);
5460 struct iavf_adapter *adapter;
5461 int err;
5462
5463 adapter = iavf_pdev_to_adapter(pdev);
5464
5465 pci_set_master(pdev);
5466
5467 rtnl_lock();
5468 err = iavf_set_interrupt_capability(adapter);
5469 if (err) {
5470 rtnl_unlock();
5471 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
5472 return err;
5473 }
5474 err = iavf_request_misc_irq(adapter);
5475 rtnl_unlock();
5476 if (err) {
5477 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
5478 return err;
5479 }
5480
5481 queue_work(adapter->wq, &adapter->reset_task);
5482
5483 netif_device_attach(adapter->netdev);
5484
5485 return err;
5486 }
5487
5488 /**
5489 * iavf_remove - Device Removal Routine
5490 * @pdev: PCI device information struct
5491 *
5492 * iavf_remove is called by the PCI subsystem to alert the driver
5493 * that it should release a PCI device. The could be caused by a
5494 * Hot-Plug event, or because the driver is going to be removed from
5495 * memory.
5496 **/
iavf_remove(struct pci_dev * pdev)5497 static void iavf_remove(struct pci_dev *pdev)
5498 {
5499 struct iavf_fdir_fltr *fdir, *fdirtmp;
5500 struct iavf_vlan_filter *vlf, *vlftmp;
5501 struct iavf_cloud_filter *cf, *cftmp;
5502 struct iavf_adv_rss *rss, *rsstmp;
5503 struct iavf_mac_filter *f, *ftmp;
5504 struct iavf_adapter *adapter;
5505 struct net_device *netdev;
5506 struct iavf_hw *hw;
5507
5508 /* Don't proceed with remove if netdev is already freed */
5509 netdev = pci_get_drvdata(pdev);
5510 if (!netdev)
5511 return;
5512
5513 adapter = iavf_pdev_to_adapter(pdev);
5514 hw = &adapter->hw;
5515
5516 if (test_and_set_bit(__IAVF_IN_REMOVE_TASK, &adapter->crit_section))
5517 return;
5518
5519 /* Wait until port initialization is complete.
5520 * There are flows where register/unregister netdev may race.
5521 */
5522 while (1) {
5523 netdev_lock(netdev);
5524 if (adapter->state == __IAVF_RUNNING ||
5525 adapter->state == __IAVF_DOWN ||
5526 adapter->state == __IAVF_INIT_FAILED) {
5527 netdev_unlock(netdev);
5528 break;
5529 }
5530 /* Simply return if we already went through iavf_shutdown */
5531 if (adapter->state == __IAVF_REMOVE) {
5532 netdev_unlock(netdev);
5533 return;
5534 }
5535
5536 netdev_unlock(netdev);
5537 usleep_range(500, 1000);
5538 }
5539 cancel_delayed_work_sync(&adapter->watchdog_task);
5540 cancel_work_sync(&adapter->finish_config);
5541
5542 if (netdev->reg_state == NETREG_REGISTERED)
5543 unregister_netdev(netdev);
5544
5545 netdev_lock(netdev);
5546 dev_info(&adapter->pdev->dev, "Removing device\n");
5547 iavf_change_state(adapter, __IAVF_REMOVE);
5548
5549 iavf_request_reset(adapter);
5550 msleep(50);
5551 /* If the FW isn't responding, kick it once, but only once. */
5552 if (!iavf_asq_done(hw)) {
5553 iavf_request_reset(adapter);
5554 msleep(50);
5555 }
5556
5557 iavf_ptp_release(adapter);
5558
5559 iavf_misc_irq_disable(adapter);
5560 /* Shut down all the garbage mashers on the detention level */
5561 netdev_unlock(netdev);
5562 cancel_work_sync(&adapter->reset_task);
5563 cancel_delayed_work_sync(&adapter->watchdog_task);
5564 cancel_work_sync(&adapter->adminq_task);
5565 netdev_lock(netdev);
5566
5567 adapter->aq_required = 0;
5568 adapter->flags &= ~IAVF_FLAG_REINIT_ITR_NEEDED;
5569
5570 iavf_free_all_tx_resources(adapter);
5571 iavf_free_all_rx_resources(adapter);
5572 iavf_free_misc_irq(adapter);
5573 iavf_free_interrupt_scheme(adapter);
5574
5575 iavf_free_rss(adapter);
5576
5577 if (hw->aq.asq.count)
5578 iavf_shutdown_adminq(hw);
5579
5580 /* destroy the locks only once, here */
5581 mutex_destroy(&hw->aq.arq_mutex);
5582 mutex_destroy(&hw->aq.asq_mutex);
5583 netdev_unlock(netdev);
5584
5585 iounmap(hw->hw_addr);
5586 pci_release_regions(pdev);
5587 kfree(adapter->vf_res);
5588 spin_lock_bh(&adapter->mac_vlan_list_lock);
5589 /* If we got removed before an up/down sequence, we've got a filter
5590 * hanging out there that we need to get rid of.
5591 */
5592 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
5593 list_del(&f->list);
5594 kfree(f);
5595 }
5596 list_for_each_entry_safe(vlf, vlftmp, &adapter->vlan_filter_list,
5597 list) {
5598 list_del(&vlf->list);
5599 kfree(vlf);
5600 }
5601
5602 spin_unlock_bh(&adapter->mac_vlan_list_lock);
5603
5604 spin_lock_bh(&adapter->cloud_filter_list_lock);
5605 list_for_each_entry_safe(cf, cftmp, &adapter->cloud_filter_list, list) {
5606 list_del(&cf->list);
5607 kfree(cf);
5608 }
5609 spin_unlock_bh(&adapter->cloud_filter_list_lock);
5610
5611 spin_lock_bh(&adapter->fdir_fltr_lock);
5612 list_for_each_entry_safe(fdir, fdirtmp, &adapter->fdir_list_head, list) {
5613 list_del(&fdir->list);
5614 kfree(fdir);
5615 }
5616 spin_unlock_bh(&adapter->fdir_fltr_lock);
5617
5618 spin_lock_bh(&adapter->adv_rss_lock);
5619 list_for_each_entry_safe(rss, rsstmp, &adapter->adv_rss_list_head,
5620 list) {
5621 list_del(&rss->list);
5622 kfree(rss);
5623 }
5624 spin_unlock_bh(&adapter->adv_rss_lock);
5625
5626 destroy_workqueue(adapter->wq);
5627
5628 pci_set_drvdata(pdev, NULL);
5629
5630 free_netdev(netdev);
5631
5632 pci_disable_device(pdev);
5633 }
5634
5635 /**
5636 * iavf_shutdown - Shutdown the device in preparation for a reboot
5637 * @pdev: pci device structure
5638 **/
iavf_shutdown(struct pci_dev * pdev)5639 static void iavf_shutdown(struct pci_dev *pdev)
5640 {
5641 iavf_remove(pdev);
5642
5643 if (system_state == SYSTEM_POWER_OFF)
5644 pci_set_power_state(pdev, PCI_D3hot);
5645 }
5646
5647 static DEFINE_SIMPLE_DEV_PM_OPS(iavf_pm_ops, iavf_suspend, iavf_resume);
5648
5649 static struct pci_driver iavf_driver = {
5650 .name = iavf_driver_name,
5651 .id_table = iavf_pci_tbl,
5652 .probe = iavf_probe,
5653 .remove = iavf_remove,
5654 .driver.pm = pm_sleep_ptr(&iavf_pm_ops),
5655 .shutdown = iavf_shutdown,
5656 };
5657
5658 /**
5659 * iavf_init_module - Driver Registration Routine
5660 *
5661 * iavf_init_module is the first routine called when the driver is
5662 * loaded. All it does is register with the PCI subsystem.
5663 **/
iavf_init_module(void)5664 static int __init iavf_init_module(void)
5665 {
5666 pr_info("iavf: %s\n", iavf_driver_string);
5667
5668 pr_info("%s\n", iavf_copyright);
5669
5670 return pci_register_driver(&iavf_driver);
5671 }
5672
5673 module_init(iavf_init_module);
5674
5675 /**
5676 * iavf_exit_module - Driver Exit Cleanup Routine
5677 *
5678 * iavf_exit_module is called just before the driver is removed
5679 * from memory.
5680 **/
iavf_exit_module(void)5681 static void __exit iavf_exit_module(void)
5682 {
5683 pci_unregister_driver(&iavf_driver);
5684 }
5685
5686 module_exit(iavf_exit_module);
5687
5688 /* iavf_main.c */
5689