1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2 /*
3 * Copyright 2015-2020 Amazon.com, Inc. or its affiliates. All rights reserved.
4 */
5
6 #include "ena_com.h"
7
8 /*****************************************************************************/
9 /*****************************************************************************/
10
11 /* Timeout in micro-sec */
12 #define ADMIN_CMD_TIMEOUT_US (3000000)
13
14 #define ENA_ASYNC_QUEUE_DEPTH 16
15 #define ENA_ADMIN_QUEUE_DEPTH 32
16
17
18 #define ENA_CTRL_MAJOR 0
19 #define ENA_CTRL_MINOR 0
20 #define ENA_CTRL_SUB_MINOR 1
21
22 #define MIN_ENA_CTRL_VER \
23 (((ENA_CTRL_MAJOR) << \
24 (ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_SHIFT)) | \
25 ((ENA_CTRL_MINOR) << \
26 (ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_SHIFT)) | \
27 (ENA_CTRL_SUB_MINOR))
28
29 #define ENA_DMA_ADDR_TO_UINT32_LOW(x) ((u32)((u64)(x)))
30 #define ENA_DMA_ADDR_TO_UINT32_HIGH(x) ((u32)(((u64)(x)) >> 32))
31
32 #define ENA_MMIO_READ_TIMEOUT 0xFFFFFFFF
33
34 #define ENA_COM_BOUNCE_BUFFER_CNTRL_CNT 4
35
36 #define ENA_REGS_ADMIN_INTR_MASK 1
37
38 #define ENA_MIN_ADMIN_POLL_US 100
39
40 #define ENA_MAX_ADMIN_POLL_US 5000
41
42 /*****************************************************************************/
43 /*****************************************************************************/
44 /*****************************************************************************/
45
46 enum ena_cmd_status {
47 ENA_CMD_SUBMITTED,
48 ENA_CMD_COMPLETED,
49 /* Abort - canceled by the driver */
50 ENA_CMD_ABORTED,
51 };
52
53 struct ena_comp_ctx {
54 struct completion wait_event;
55 struct ena_admin_acq_entry *user_cqe;
56 u32 comp_size;
57 enum ena_cmd_status status;
58 /* status from the device */
59 u8 comp_status;
60 u8 cmd_opcode;
61 bool occupied;
62 };
63
64 struct ena_com_stats_ctx {
65 struct ena_admin_aq_get_stats_cmd get_cmd;
66 struct ena_admin_acq_get_stats_resp get_resp;
67 };
68
ena_com_mem_addr_set(struct ena_com_dev * ena_dev,struct ena_common_mem_addr * ena_addr,dma_addr_t addr)69 static int ena_com_mem_addr_set(struct ena_com_dev *ena_dev,
70 struct ena_common_mem_addr *ena_addr,
71 dma_addr_t addr)
72 {
73 if ((addr & GENMASK_ULL(ena_dev->dma_addr_bits - 1, 0)) != addr) {
74 netdev_err(ena_dev->net_device,
75 "DMA address has more bits that the device supports\n");
76 return -EINVAL;
77 }
78
79 ena_addr->mem_addr_low = lower_32_bits(addr);
80 ena_addr->mem_addr_high = (u16)upper_32_bits(addr);
81
82 return 0;
83 }
84
ena_com_admin_init_sq(struct ena_com_admin_queue * admin_queue)85 static int ena_com_admin_init_sq(struct ena_com_admin_queue *admin_queue)
86 {
87 struct ena_com_dev *ena_dev = admin_queue->ena_dev;
88 struct ena_com_admin_sq *sq = &admin_queue->sq;
89 u16 size = ADMIN_SQ_SIZE(admin_queue->q_depth);
90
91 sq->entries = dma_alloc_coherent(admin_queue->q_dmadev, size,
92 &sq->dma_addr, GFP_KERNEL);
93
94 if (!sq->entries) {
95 netdev_err(ena_dev->net_device, "Memory allocation failed\n");
96 return -ENOMEM;
97 }
98
99 sq->head = 0;
100 sq->tail = 0;
101 sq->phase = 1;
102
103 sq->db_addr = NULL;
104
105 return 0;
106 }
107
ena_com_admin_init_cq(struct ena_com_admin_queue * admin_queue)108 static int ena_com_admin_init_cq(struct ena_com_admin_queue *admin_queue)
109 {
110 struct ena_com_dev *ena_dev = admin_queue->ena_dev;
111 struct ena_com_admin_cq *cq = &admin_queue->cq;
112 u16 size = ADMIN_CQ_SIZE(admin_queue->q_depth);
113
114 cq->entries = dma_alloc_coherent(admin_queue->q_dmadev, size,
115 &cq->dma_addr, GFP_KERNEL);
116
117 if (!cq->entries) {
118 netdev_err(ena_dev->net_device, "Memory allocation failed\n");
119 return -ENOMEM;
120 }
121
122 cq->head = 0;
123 cq->phase = 1;
124
125 return 0;
126 }
127
ena_com_admin_init_aenq(struct ena_com_dev * ena_dev,struct ena_aenq_handlers * aenq_handlers)128 static int ena_com_admin_init_aenq(struct ena_com_dev *ena_dev,
129 struct ena_aenq_handlers *aenq_handlers)
130 {
131 struct ena_com_aenq *aenq = &ena_dev->aenq;
132 u32 addr_low, addr_high, aenq_caps;
133 u16 size;
134
135 ena_dev->aenq.q_depth = ENA_ASYNC_QUEUE_DEPTH;
136 size = ADMIN_AENQ_SIZE(ENA_ASYNC_QUEUE_DEPTH);
137 aenq->entries = dma_alloc_coherent(ena_dev->dmadev, size,
138 &aenq->dma_addr, GFP_KERNEL);
139
140 if (!aenq->entries) {
141 netdev_err(ena_dev->net_device, "Memory allocation failed\n");
142 return -ENOMEM;
143 }
144
145 aenq->head = aenq->q_depth;
146 aenq->phase = 1;
147
148 addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(aenq->dma_addr);
149 addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(aenq->dma_addr);
150
151 writel(addr_low, ena_dev->reg_bar + ENA_REGS_AENQ_BASE_LO_OFF);
152 writel(addr_high, ena_dev->reg_bar + ENA_REGS_AENQ_BASE_HI_OFF);
153
154 aenq_caps = 0;
155 aenq_caps |= ena_dev->aenq.q_depth & ENA_REGS_AENQ_CAPS_AENQ_DEPTH_MASK;
156 aenq_caps |= (sizeof(struct ena_admin_aenq_entry)
157 << ENA_REGS_AENQ_CAPS_AENQ_ENTRY_SIZE_SHIFT) &
158 ENA_REGS_AENQ_CAPS_AENQ_ENTRY_SIZE_MASK;
159 writel(aenq_caps, ena_dev->reg_bar + ENA_REGS_AENQ_CAPS_OFF);
160
161 if (unlikely(!aenq_handlers)) {
162 netdev_err(ena_dev->net_device,
163 "AENQ handlers pointer is NULL\n");
164 return -EINVAL;
165 }
166
167 aenq->aenq_handlers = aenq_handlers;
168
169 return 0;
170 }
171
comp_ctxt_release(struct ena_com_admin_queue * queue,struct ena_comp_ctx * comp_ctx)172 static void comp_ctxt_release(struct ena_com_admin_queue *queue,
173 struct ena_comp_ctx *comp_ctx)
174 {
175 comp_ctx->occupied = false;
176 atomic_dec(&queue->outstanding_cmds);
177 }
178
get_comp_ctxt(struct ena_com_admin_queue * admin_queue,u16 command_id,bool capture)179 static struct ena_comp_ctx *get_comp_ctxt(struct ena_com_admin_queue *admin_queue,
180 u16 command_id, bool capture)
181 {
182 if (unlikely(command_id >= admin_queue->q_depth)) {
183 netdev_err(admin_queue->ena_dev->net_device,
184 "Command id is larger than the queue size. cmd_id: %u queue size %d\n",
185 command_id, admin_queue->q_depth);
186 return NULL;
187 }
188
189 if (unlikely(!admin_queue->comp_ctx)) {
190 netdev_err(admin_queue->ena_dev->net_device,
191 "Completion context is NULL\n");
192 return NULL;
193 }
194
195 if (unlikely(admin_queue->comp_ctx[command_id].occupied && capture)) {
196 netdev_err(admin_queue->ena_dev->net_device,
197 "Completion context is occupied\n");
198 return NULL;
199 }
200
201 if (capture) {
202 atomic_inc(&admin_queue->outstanding_cmds);
203 admin_queue->comp_ctx[command_id].occupied = true;
204 }
205
206 return &admin_queue->comp_ctx[command_id];
207 }
208
__ena_com_submit_admin_cmd(struct ena_com_admin_queue * admin_queue,struct ena_admin_aq_entry * cmd,size_t cmd_size_in_bytes,struct ena_admin_acq_entry * comp,size_t comp_size_in_bytes)209 static struct ena_comp_ctx *__ena_com_submit_admin_cmd(struct ena_com_admin_queue *admin_queue,
210 struct ena_admin_aq_entry *cmd,
211 size_t cmd_size_in_bytes,
212 struct ena_admin_acq_entry *comp,
213 size_t comp_size_in_bytes)
214 {
215 struct ena_comp_ctx *comp_ctx;
216 u16 tail_masked, cmd_id;
217 u16 queue_size_mask;
218 u16 cnt;
219
220 queue_size_mask = admin_queue->q_depth - 1;
221
222 tail_masked = admin_queue->sq.tail & queue_size_mask;
223
224 /* In case of queue FULL */
225 cnt = (u16)atomic_read(&admin_queue->outstanding_cmds);
226 if (cnt >= admin_queue->q_depth) {
227 netdev_dbg(admin_queue->ena_dev->net_device,
228 "Admin queue is full.\n");
229 admin_queue->stats.out_of_space++;
230 return ERR_PTR(-ENOSPC);
231 }
232
233 cmd_id = admin_queue->curr_cmd_id;
234
235 cmd->aq_common_descriptor.flags |= admin_queue->sq.phase &
236 ENA_ADMIN_AQ_COMMON_DESC_PHASE_MASK;
237
238 cmd->aq_common_descriptor.command_id |= cmd_id &
239 ENA_ADMIN_AQ_COMMON_DESC_COMMAND_ID_MASK;
240
241 comp_ctx = get_comp_ctxt(admin_queue, cmd_id, true);
242 if (unlikely(!comp_ctx))
243 return ERR_PTR(-EINVAL);
244
245 comp_ctx->status = ENA_CMD_SUBMITTED;
246 comp_ctx->comp_size = (u32)comp_size_in_bytes;
247 comp_ctx->user_cqe = comp;
248 comp_ctx->cmd_opcode = cmd->aq_common_descriptor.opcode;
249
250 reinit_completion(&comp_ctx->wait_event);
251
252 memcpy(&admin_queue->sq.entries[tail_masked], cmd, cmd_size_in_bytes);
253
254 admin_queue->curr_cmd_id = (admin_queue->curr_cmd_id + 1) &
255 queue_size_mask;
256
257 admin_queue->sq.tail++;
258 admin_queue->stats.submitted_cmd++;
259
260 if (unlikely((admin_queue->sq.tail & queue_size_mask) == 0))
261 admin_queue->sq.phase = !admin_queue->sq.phase;
262
263 writel(admin_queue->sq.tail, admin_queue->sq.db_addr);
264
265 return comp_ctx;
266 }
267
ena_com_init_comp_ctxt(struct ena_com_admin_queue * admin_queue)268 static int ena_com_init_comp_ctxt(struct ena_com_admin_queue *admin_queue)
269 {
270 struct ena_com_dev *ena_dev = admin_queue->ena_dev;
271 size_t size = admin_queue->q_depth * sizeof(struct ena_comp_ctx);
272 struct ena_comp_ctx *comp_ctx;
273 u16 i;
274
275 admin_queue->comp_ctx =
276 devm_kzalloc(admin_queue->q_dmadev, size, GFP_KERNEL);
277 if (unlikely(!admin_queue->comp_ctx)) {
278 netdev_err(ena_dev->net_device, "Memory allocation failed\n");
279 return -ENOMEM;
280 }
281
282 for (i = 0; i < admin_queue->q_depth; i++) {
283 comp_ctx = get_comp_ctxt(admin_queue, i, false);
284 if (comp_ctx)
285 init_completion(&comp_ctx->wait_event);
286 }
287
288 return 0;
289 }
290
ena_com_submit_admin_cmd(struct ena_com_admin_queue * admin_queue,struct ena_admin_aq_entry * cmd,size_t cmd_size_in_bytes,struct ena_admin_acq_entry * comp,size_t comp_size_in_bytes)291 static struct ena_comp_ctx *ena_com_submit_admin_cmd(struct ena_com_admin_queue *admin_queue,
292 struct ena_admin_aq_entry *cmd,
293 size_t cmd_size_in_bytes,
294 struct ena_admin_acq_entry *comp,
295 size_t comp_size_in_bytes)
296 {
297 unsigned long flags = 0;
298 struct ena_comp_ctx *comp_ctx;
299
300 spin_lock_irqsave(&admin_queue->q_lock, flags);
301 if (unlikely(!admin_queue->running_state)) {
302 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
303 return ERR_PTR(-ENODEV);
304 }
305 comp_ctx = __ena_com_submit_admin_cmd(admin_queue, cmd,
306 cmd_size_in_bytes,
307 comp,
308 comp_size_in_bytes);
309 if (IS_ERR(comp_ctx))
310 admin_queue->running_state = false;
311 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
312
313 return comp_ctx;
314 }
315
ena_com_init_io_sq(struct ena_com_dev * ena_dev,struct ena_com_create_io_ctx * ctx,struct ena_com_io_sq * io_sq)316 static int ena_com_init_io_sq(struct ena_com_dev *ena_dev,
317 struct ena_com_create_io_ctx *ctx,
318 struct ena_com_io_sq *io_sq)
319 {
320 size_t size;
321 int dev_node = 0;
322
323 memset(&io_sq->desc_addr, 0x0, sizeof(io_sq->desc_addr));
324
325 io_sq->dma_addr_bits = (u8)ena_dev->dma_addr_bits;
326 io_sq->desc_entry_size =
327 (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX) ?
328 sizeof(struct ena_eth_io_tx_desc) :
329 sizeof(struct ena_eth_io_rx_desc);
330
331 size = io_sq->desc_entry_size * io_sq->q_depth;
332
333 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST) {
334 dev_node = dev_to_node(ena_dev->dmadev);
335 set_dev_node(ena_dev->dmadev, ctx->numa_node);
336 io_sq->desc_addr.virt_addr =
337 dma_alloc_coherent(ena_dev->dmadev, size,
338 &io_sq->desc_addr.phys_addr,
339 GFP_KERNEL);
340 set_dev_node(ena_dev->dmadev, dev_node);
341 if (!io_sq->desc_addr.virt_addr) {
342 io_sq->desc_addr.virt_addr =
343 dma_alloc_coherent(ena_dev->dmadev, size,
344 &io_sq->desc_addr.phys_addr,
345 GFP_KERNEL);
346 }
347
348 if (!io_sq->desc_addr.virt_addr) {
349 netdev_err(ena_dev->net_device,
350 "Memory allocation failed\n");
351 return -ENOMEM;
352 }
353 }
354
355 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
356 /* Allocate bounce buffers */
357 io_sq->bounce_buf_ctrl.buffer_size =
358 ena_dev->llq_info.desc_list_entry_size;
359 io_sq->bounce_buf_ctrl.buffers_num =
360 ENA_COM_BOUNCE_BUFFER_CNTRL_CNT;
361 io_sq->bounce_buf_ctrl.next_to_use = 0;
362
363 size = io_sq->bounce_buf_ctrl.buffer_size *
364 io_sq->bounce_buf_ctrl.buffers_num;
365
366 dev_node = dev_to_node(ena_dev->dmadev);
367 set_dev_node(ena_dev->dmadev, ctx->numa_node);
368 io_sq->bounce_buf_ctrl.base_buffer =
369 devm_kzalloc(ena_dev->dmadev, size, GFP_KERNEL);
370 set_dev_node(ena_dev->dmadev, dev_node);
371 if (!io_sq->bounce_buf_ctrl.base_buffer)
372 io_sq->bounce_buf_ctrl.base_buffer =
373 devm_kzalloc(ena_dev->dmadev, size, GFP_KERNEL);
374
375 if (!io_sq->bounce_buf_ctrl.base_buffer) {
376 netdev_err(ena_dev->net_device,
377 "Bounce buffer memory allocation failed\n");
378 return -ENOMEM;
379 }
380
381 memcpy(&io_sq->llq_info, &ena_dev->llq_info,
382 sizeof(io_sq->llq_info));
383
384 /* Initiate the first bounce buffer */
385 io_sq->llq_buf_ctrl.curr_bounce_buf =
386 ena_com_get_next_bounce_buffer(&io_sq->bounce_buf_ctrl);
387 memset(io_sq->llq_buf_ctrl.curr_bounce_buf,
388 0x0, io_sq->llq_info.desc_list_entry_size);
389 io_sq->llq_buf_ctrl.descs_left_in_line =
390 io_sq->llq_info.descs_num_before_header;
391 io_sq->disable_meta_caching =
392 io_sq->llq_info.disable_meta_caching;
393
394 if (io_sq->llq_info.max_entries_in_tx_burst > 0)
395 io_sq->entries_in_tx_burst_left =
396 io_sq->llq_info.max_entries_in_tx_burst;
397 }
398
399 io_sq->tail = 0;
400 io_sq->next_to_comp = 0;
401 io_sq->phase = 1;
402
403 return 0;
404 }
405
ena_com_init_io_cq(struct ena_com_dev * ena_dev,struct ena_com_create_io_ctx * ctx,struct ena_com_io_cq * io_cq)406 static int ena_com_init_io_cq(struct ena_com_dev *ena_dev,
407 struct ena_com_create_io_ctx *ctx,
408 struct ena_com_io_cq *io_cq)
409 {
410 size_t size;
411 int prev_node = 0;
412
413 memset(&io_cq->cdesc_addr, 0x0, sizeof(io_cq->cdesc_addr));
414
415 /* Use the basic completion descriptor for Rx */
416 io_cq->cdesc_entry_size_in_bytes =
417 (io_cq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX) ?
418 sizeof(struct ena_eth_io_tx_cdesc) :
419 sizeof(struct ena_eth_io_rx_cdesc_base);
420
421 size = io_cq->cdesc_entry_size_in_bytes * io_cq->q_depth;
422
423 prev_node = dev_to_node(ena_dev->dmadev);
424 set_dev_node(ena_dev->dmadev, ctx->numa_node);
425 io_cq->cdesc_addr.virt_addr =
426 dma_alloc_coherent(ena_dev->dmadev, size,
427 &io_cq->cdesc_addr.phys_addr, GFP_KERNEL);
428 set_dev_node(ena_dev->dmadev, prev_node);
429 if (!io_cq->cdesc_addr.virt_addr) {
430 io_cq->cdesc_addr.virt_addr =
431 dma_alloc_coherent(ena_dev->dmadev, size,
432 &io_cq->cdesc_addr.phys_addr,
433 GFP_KERNEL);
434 }
435
436 if (!io_cq->cdesc_addr.virt_addr) {
437 netdev_err(ena_dev->net_device, "Memory allocation failed\n");
438 return -ENOMEM;
439 }
440
441 io_cq->phase = 1;
442 io_cq->head = 0;
443
444 return 0;
445 }
446
ena_com_handle_single_admin_completion(struct ena_com_admin_queue * admin_queue,struct ena_admin_acq_entry * cqe)447 static void ena_com_handle_single_admin_completion(struct ena_com_admin_queue *admin_queue,
448 struct ena_admin_acq_entry *cqe)
449 {
450 struct ena_comp_ctx *comp_ctx;
451 u16 cmd_id;
452
453 cmd_id = cqe->acq_common_descriptor.command &
454 ENA_ADMIN_ACQ_COMMON_DESC_COMMAND_ID_MASK;
455
456 comp_ctx = get_comp_ctxt(admin_queue, cmd_id, false);
457 if (unlikely(!comp_ctx)) {
458 netdev_err(admin_queue->ena_dev->net_device,
459 "comp_ctx is NULL. Changing the admin queue running state\n");
460 admin_queue->running_state = false;
461 return;
462 }
463
464 comp_ctx->status = ENA_CMD_COMPLETED;
465 comp_ctx->comp_status = cqe->acq_common_descriptor.status;
466
467 if (comp_ctx->user_cqe)
468 memcpy(comp_ctx->user_cqe, (void *)cqe, comp_ctx->comp_size);
469
470 if (!admin_queue->polling)
471 complete(&comp_ctx->wait_event);
472 }
473
ena_com_handle_admin_completion(struct ena_com_admin_queue * admin_queue)474 static void ena_com_handle_admin_completion(struct ena_com_admin_queue *admin_queue)
475 {
476 struct ena_admin_acq_entry *cqe = NULL;
477 u16 comp_num = 0;
478 u16 head_masked;
479 u8 phase;
480
481 head_masked = admin_queue->cq.head & (admin_queue->q_depth - 1);
482 phase = admin_queue->cq.phase;
483
484 cqe = &admin_queue->cq.entries[head_masked];
485
486 /* Go over all the completions */
487 while ((READ_ONCE(cqe->acq_common_descriptor.flags) &
488 ENA_ADMIN_ACQ_COMMON_DESC_PHASE_MASK) == phase) {
489 /* Do not read the rest of the completion entry before the
490 * phase bit was validated
491 */
492 dma_rmb();
493 ena_com_handle_single_admin_completion(admin_queue, cqe);
494
495 head_masked++;
496 comp_num++;
497 if (unlikely(head_masked == admin_queue->q_depth)) {
498 head_masked = 0;
499 phase = !phase;
500 }
501
502 cqe = &admin_queue->cq.entries[head_masked];
503 }
504
505 admin_queue->cq.head += comp_num;
506 admin_queue->cq.phase = phase;
507 admin_queue->sq.head += comp_num;
508 admin_queue->stats.completed_cmd += comp_num;
509 }
510
ena_com_comp_status_to_errno(struct ena_com_admin_queue * admin_queue,u8 comp_status)511 static int ena_com_comp_status_to_errno(struct ena_com_admin_queue *admin_queue,
512 u8 comp_status)
513 {
514 if (unlikely(comp_status != 0))
515 netdev_err(admin_queue->ena_dev->net_device,
516 "Admin command failed[%u]\n", comp_status);
517
518 switch (comp_status) {
519 case ENA_ADMIN_SUCCESS:
520 return 0;
521 case ENA_ADMIN_RESOURCE_ALLOCATION_FAILURE:
522 return -ENOMEM;
523 case ENA_ADMIN_UNSUPPORTED_OPCODE:
524 return -EOPNOTSUPP;
525 case ENA_ADMIN_BAD_OPCODE:
526 case ENA_ADMIN_MALFORMED_REQUEST:
527 case ENA_ADMIN_ILLEGAL_PARAMETER:
528 case ENA_ADMIN_UNKNOWN_ERROR:
529 return -EINVAL;
530 case ENA_ADMIN_RESOURCE_BUSY:
531 return -EAGAIN;
532 }
533
534 return -EINVAL;
535 }
536
ena_delay_exponential_backoff_us(u32 exp,u32 delay_us)537 static void ena_delay_exponential_backoff_us(u32 exp, u32 delay_us)
538 {
539 delay_us = max_t(u32, ENA_MIN_ADMIN_POLL_US, delay_us);
540 delay_us = min_t(u32, delay_us * (1U << exp), ENA_MAX_ADMIN_POLL_US);
541 usleep_range(delay_us, 2 * delay_us);
542 }
543
ena_com_wait_and_process_admin_cq_polling(struct ena_comp_ctx * comp_ctx,struct ena_com_admin_queue * admin_queue)544 static int ena_com_wait_and_process_admin_cq_polling(struct ena_comp_ctx *comp_ctx,
545 struct ena_com_admin_queue *admin_queue)
546 {
547 unsigned long flags = 0;
548 unsigned long timeout;
549 int ret;
550 u32 exp = 0;
551
552 timeout = jiffies + usecs_to_jiffies(admin_queue->completion_timeout);
553
554 while (1) {
555 spin_lock_irqsave(&admin_queue->q_lock, flags);
556 ena_com_handle_admin_completion(admin_queue);
557 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
558
559 if (comp_ctx->status != ENA_CMD_SUBMITTED)
560 break;
561
562 if (time_is_before_jiffies(timeout)) {
563 netdev_err(admin_queue->ena_dev->net_device,
564 "Wait for completion (polling) timeout\n");
565 /* ENA didn't have any completion */
566 spin_lock_irqsave(&admin_queue->q_lock, flags);
567 admin_queue->stats.no_completion++;
568 admin_queue->running_state = false;
569 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
570
571 ret = -ETIME;
572 goto err;
573 }
574
575 ena_delay_exponential_backoff_us(exp++,
576 admin_queue->ena_dev->ena_min_poll_delay_us);
577 }
578
579 if (unlikely(comp_ctx->status == ENA_CMD_ABORTED)) {
580 netdev_err(admin_queue->ena_dev->net_device,
581 "Command was aborted\n");
582 spin_lock_irqsave(&admin_queue->q_lock, flags);
583 admin_queue->stats.aborted_cmd++;
584 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
585 ret = -ENODEV;
586 goto err;
587 }
588
589 WARN(comp_ctx->status != ENA_CMD_COMPLETED, "Invalid comp status %d\n",
590 comp_ctx->status);
591
592 ret = ena_com_comp_status_to_errno(admin_queue, comp_ctx->comp_status);
593 err:
594 comp_ctxt_release(admin_queue, comp_ctx);
595 return ret;
596 }
597
598 /*
599 * Set the LLQ configurations of the firmware
600 *
601 * The driver provides only the enabled feature values to the device,
602 * which in turn, checks if they are supported.
603 */
ena_com_set_llq(struct ena_com_dev * ena_dev)604 static int ena_com_set_llq(struct ena_com_dev *ena_dev)
605 {
606 struct ena_com_admin_queue *admin_queue;
607 struct ena_admin_set_feat_cmd cmd;
608 struct ena_admin_set_feat_resp resp;
609 struct ena_com_llq_info *llq_info = &ena_dev->llq_info;
610 int ret;
611
612 memset(&cmd, 0x0, sizeof(cmd));
613 admin_queue = &ena_dev->admin_queue;
614
615 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
616 cmd.feat_common.feature_id = ENA_ADMIN_LLQ;
617
618 cmd.u.llq.header_location_ctrl_enabled = llq_info->header_location_ctrl;
619 cmd.u.llq.entry_size_ctrl_enabled = llq_info->desc_list_entry_size_ctrl;
620 cmd.u.llq.desc_num_before_header_enabled = llq_info->descs_num_before_header;
621 cmd.u.llq.descriptors_stride_ctrl_enabled = llq_info->desc_stride_ctrl;
622
623 cmd.u.llq.accel_mode.u.set.enabled_flags =
624 BIT(ENA_ADMIN_DISABLE_META_CACHING) |
625 BIT(ENA_ADMIN_LIMIT_TX_BURST);
626
627 ret = ena_com_execute_admin_command(admin_queue,
628 (struct ena_admin_aq_entry *)&cmd,
629 sizeof(cmd),
630 (struct ena_admin_acq_entry *)&resp,
631 sizeof(resp));
632
633 if (unlikely(ret))
634 netdev_err(ena_dev->net_device,
635 "Failed to set LLQ configurations: %d\n", ret);
636
637 return ret;
638 }
639
ena_com_config_llq_info(struct ena_com_dev * ena_dev,struct ena_admin_feature_llq_desc * llq_features,struct ena_llq_configurations * llq_default_cfg)640 static int ena_com_config_llq_info(struct ena_com_dev *ena_dev,
641 struct ena_admin_feature_llq_desc *llq_features,
642 struct ena_llq_configurations *llq_default_cfg)
643 {
644 struct ena_com_llq_info *llq_info = &ena_dev->llq_info;
645 struct ena_admin_accel_mode_get llq_accel_mode_get;
646 u16 supported_feat;
647 int rc;
648
649 memset(llq_info, 0, sizeof(*llq_info));
650
651 supported_feat = llq_features->header_location_ctrl_supported;
652
653 if (likely(supported_feat & llq_default_cfg->llq_header_location)) {
654 llq_info->header_location_ctrl =
655 llq_default_cfg->llq_header_location;
656 } else {
657 netdev_err(ena_dev->net_device,
658 "Invalid header location control, supported: 0x%x\n",
659 supported_feat);
660 return -EINVAL;
661 }
662
663 if (likely(llq_info->header_location_ctrl == ENA_ADMIN_INLINE_HEADER)) {
664 supported_feat = llq_features->descriptors_stride_ctrl_supported;
665 if (likely(supported_feat & llq_default_cfg->llq_stride_ctrl)) {
666 llq_info->desc_stride_ctrl = llq_default_cfg->llq_stride_ctrl;
667 } else {
668 if (supported_feat & ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY) {
669 llq_info->desc_stride_ctrl = ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY;
670 } else if (supported_feat & ENA_ADMIN_SINGLE_DESC_PER_ENTRY) {
671 llq_info->desc_stride_ctrl = ENA_ADMIN_SINGLE_DESC_PER_ENTRY;
672 } else {
673 netdev_err(ena_dev->net_device,
674 "Invalid desc_stride_ctrl, supported: 0x%x\n",
675 supported_feat);
676 return -EINVAL;
677 }
678
679 netdev_err(ena_dev->net_device,
680 "Default llq stride ctrl is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n",
681 llq_default_cfg->llq_stride_ctrl,
682 supported_feat, llq_info->desc_stride_ctrl);
683 }
684 } else {
685 llq_info->desc_stride_ctrl = 0;
686 }
687
688 supported_feat = llq_features->entry_size_ctrl_supported;
689 if (likely(supported_feat & llq_default_cfg->llq_ring_entry_size)) {
690 llq_info->desc_list_entry_size_ctrl = llq_default_cfg->llq_ring_entry_size;
691 llq_info->desc_list_entry_size = llq_default_cfg->llq_ring_entry_size_value;
692 } else {
693 if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_128B) {
694 llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_128B;
695 llq_info->desc_list_entry_size = 128;
696 } else if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_192B) {
697 llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_192B;
698 llq_info->desc_list_entry_size = 192;
699 } else if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_256B) {
700 llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_256B;
701 llq_info->desc_list_entry_size = 256;
702 } else {
703 netdev_err(ena_dev->net_device,
704 "Invalid entry_size_ctrl, supported: 0x%x\n",
705 supported_feat);
706 return -EINVAL;
707 }
708
709 netdev_err(ena_dev->net_device,
710 "Default llq ring entry size is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n",
711 llq_default_cfg->llq_ring_entry_size, supported_feat,
712 llq_info->desc_list_entry_size);
713 }
714 if (unlikely(llq_info->desc_list_entry_size & 0x7)) {
715 /* The desc list entry size should be whole multiply of 8
716 * This requirement comes from __iowrite64_copy()
717 */
718 netdev_err(ena_dev->net_device, "Illegal entry size %d\n",
719 llq_info->desc_list_entry_size);
720 return -EINVAL;
721 }
722
723 if (llq_info->desc_stride_ctrl == ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY)
724 llq_info->descs_per_entry = llq_info->desc_list_entry_size /
725 sizeof(struct ena_eth_io_tx_desc);
726 else
727 llq_info->descs_per_entry = 1;
728
729 supported_feat = llq_features->desc_num_before_header_supported;
730 if (likely(supported_feat & llq_default_cfg->llq_num_decs_before_header)) {
731 llq_info->descs_num_before_header = llq_default_cfg->llq_num_decs_before_header;
732 } else {
733 if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2) {
734 llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2;
735 } else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_1) {
736 llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_1;
737 } else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_4) {
738 llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_4;
739 } else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_8) {
740 llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_8;
741 } else {
742 netdev_err(ena_dev->net_device,
743 "Invalid descs_num_before_header, supported: 0x%x\n",
744 supported_feat);
745 return -EINVAL;
746 }
747
748 netdev_err(ena_dev->net_device,
749 "Default llq num descs before header is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n",
750 llq_default_cfg->llq_num_decs_before_header,
751 supported_feat, llq_info->descs_num_before_header);
752 }
753 /* Check for accelerated queue supported */
754 llq_accel_mode_get = llq_features->accel_mode.u.get;
755
756 llq_info->disable_meta_caching =
757 !!(llq_accel_mode_get.supported_flags &
758 BIT(ENA_ADMIN_DISABLE_META_CACHING));
759
760 if (llq_accel_mode_get.supported_flags & BIT(ENA_ADMIN_LIMIT_TX_BURST))
761 llq_info->max_entries_in_tx_burst =
762 llq_accel_mode_get.max_tx_burst_size /
763 llq_default_cfg->llq_ring_entry_size_value;
764
765 rc = ena_com_set_llq(ena_dev);
766 if (rc)
767 netdev_err(ena_dev->net_device,
768 "Cannot set LLQ configuration: %d\n", rc);
769
770 return rc;
771 }
772
ena_com_wait_and_process_admin_cq_interrupts(struct ena_comp_ctx * comp_ctx,struct ena_com_admin_queue * admin_queue)773 static int ena_com_wait_and_process_admin_cq_interrupts(struct ena_comp_ctx *comp_ctx,
774 struct ena_com_admin_queue *admin_queue)
775 {
776 unsigned long flags = 0;
777 int ret;
778
779 wait_for_completion_timeout(&comp_ctx->wait_event,
780 usecs_to_jiffies(
781 admin_queue->completion_timeout));
782
783 /* In case the command wasn't completed find out the root cause.
784 * There might be 2 kinds of errors
785 * 1) No completion (timeout reached)
786 * 2) There is completion but the device didn't get any msi-x interrupt.
787 */
788 if (unlikely(comp_ctx->status == ENA_CMD_SUBMITTED)) {
789 spin_lock_irqsave(&admin_queue->q_lock, flags);
790 ena_com_handle_admin_completion(admin_queue);
791 admin_queue->stats.no_completion++;
792 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
793
794 if (comp_ctx->status == ENA_CMD_COMPLETED) {
795 netdev_err(admin_queue->ena_dev->net_device,
796 "The ena device sent a completion but the driver didn't receive a MSI-X interrupt (cmd %d), autopolling mode is %s\n",
797 comp_ctx->cmd_opcode,
798 admin_queue->auto_polling ? "ON" : "OFF");
799 /* Check if fallback to polling is enabled */
800 if (admin_queue->auto_polling)
801 admin_queue->polling = true;
802 } else {
803 netdev_err(admin_queue->ena_dev->net_device,
804 "The ena device didn't send a completion for the admin cmd %d status %d\n",
805 comp_ctx->cmd_opcode, comp_ctx->status);
806 }
807 /* Check if shifted to polling mode.
808 * This will happen if there is a completion without an interrupt
809 * and autopolling mode is enabled. Continuing normal execution in such case
810 */
811 if (!admin_queue->polling) {
812 admin_queue->running_state = false;
813 ret = -ETIME;
814 goto err;
815 }
816 }
817
818 ret = ena_com_comp_status_to_errno(admin_queue, comp_ctx->comp_status);
819 err:
820 comp_ctxt_release(admin_queue, comp_ctx);
821 return ret;
822 }
823
824 /* This method read the hardware device register through posting writes
825 * and waiting for response
826 * On timeout the function will return ENA_MMIO_READ_TIMEOUT
827 */
ena_com_reg_bar_read32(struct ena_com_dev * ena_dev,u16 offset)828 static u32 ena_com_reg_bar_read32(struct ena_com_dev *ena_dev, u16 offset)
829 {
830 struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
831 volatile struct ena_admin_ena_mmio_req_read_less_resp *read_resp =
832 mmio_read->read_resp;
833 u32 mmio_read_reg, ret, i;
834 unsigned long flags = 0;
835 u32 timeout = mmio_read->reg_read_to;
836
837 might_sleep();
838
839 if (timeout == 0)
840 timeout = ENA_REG_READ_TIMEOUT;
841
842 /* If readless is disabled, perform regular read */
843 if (!mmio_read->readless_supported)
844 return readl(ena_dev->reg_bar + offset);
845
846 spin_lock_irqsave(&mmio_read->lock, flags);
847 mmio_read->seq_num++;
848
849 read_resp->req_id = mmio_read->seq_num + 0xDEAD;
850 mmio_read_reg = (offset << ENA_REGS_MMIO_REG_READ_REG_OFF_SHIFT) &
851 ENA_REGS_MMIO_REG_READ_REG_OFF_MASK;
852 mmio_read_reg |= mmio_read->seq_num &
853 ENA_REGS_MMIO_REG_READ_REQ_ID_MASK;
854
855 writel(mmio_read_reg, ena_dev->reg_bar + ENA_REGS_MMIO_REG_READ_OFF);
856
857 for (i = 0; i < timeout; i++) {
858 if (READ_ONCE(read_resp->req_id) == mmio_read->seq_num)
859 break;
860
861 udelay(1);
862 }
863
864 if (unlikely(i == timeout)) {
865 netdev_err(ena_dev->net_device,
866 "Reading reg failed for timeout. expected: req id[%u] offset[%u] actual: req id[%u] offset[%u]\n",
867 mmio_read->seq_num, offset, read_resp->req_id,
868 read_resp->reg_off);
869 ret = ENA_MMIO_READ_TIMEOUT;
870 goto err;
871 }
872
873 if (read_resp->reg_off != offset) {
874 netdev_err(ena_dev->net_device,
875 "Read failure: wrong offset provided\n");
876 ret = ENA_MMIO_READ_TIMEOUT;
877 } else {
878 ret = read_resp->reg_val;
879 }
880 err:
881 spin_unlock_irqrestore(&mmio_read->lock, flags);
882
883 return ret;
884 }
885
886 /* There are two types to wait for completion.
887 * Polling mode - wait until the completion is available.
888 * Async mode - wait on wait queue until the completion is ready
889 * (or the timeout expired).
890 * It is expected that the IRQ called ena_com_handle_admin_completion
891 * to mark the completions.
892 */
ena_com_wait_and_process_admin_cq(struct ena_comp_ctx * comp_ctx,struct ena_com_admin_queue * admin_queue)893 static int ena_com_wait_and_process_admin_cq(struct ena_comp_ctx *comp_ctx,
894 struct ena_com_admin_queue *admin_queue)
895 {
896 if (admin_queue->polling)
897 return ena_com_wait_and_process_admin_cq_polling(comp_ctx,
898 admin_queue);
899
900 return ena_com_wait_and_process_admin_cq_interrupts(comp_ctx,
901 admin_queue);
902 }
903
ena_com_destroy_io_sq(struct ena_com_dev * ena_dev,struct ena_com_io_sq * io_sq)904 static int ena_com_destroy_io_sq(struct ena_com_dev *ena_dev,
905 struct ena_com_io_sq *io_sq)
906 {
907 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
908 struct ena_admin_aq_destroy_sq_cmd destroy_cmd;
909 struct ena_admin_acq_destroy_sq_resp_desc destroy_resp;
910 u8 direction;
911 int ret;
912
913 memset(&destroy_cmd, 0x0, sizeof(destroy_cmd));
914
915 if (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
916 direction = ENA_ADMIN_SQ_DIRECTION_TX;
917 else
918 direction = ENA_ADMIN_SQ_DIRECTION_RX;
919
920 destroy_cmd.sq.sq_identity |= (direction <<
921 ENA_ADMIN_SQ_SQ_DIRECTION_SHIFT) &
922 ENA_ADMIN_SQ_SQ_DIRECTION_MASK;
923
924 destroy_cmd.sq.sq_idx = io_sq->idx;
925 destroy_cmd.aq_common_descriptor.opcode = ENA_ADMIN_DESTROY_SQ;
926
927 ret = ena_com_execute_admin_command(admin_queue,
928 (struct ena_admin_aq_entry *)&destroy_cmd,
929 sizeof(destroy_cmd),
930 (struct ena_admin_acq_entry *)&destroy_resp,
931 sizeof(destroy_resp));
932
933 if (unlikely(ret && (ret != -ENODEV)))
934 netdev_err(ena_dev->net_device,
935 "Failed to destroy io sq error: %d\n", ret);
936
937 return ret;
938 }
939
ena_com_io_queue_free(struct ena_com_dev * ena_dev,struct ena_com_io_sq * io_sq,struct ena_com_io_cq * io_cq)940 static void ena_com_io_queue_free(struct ena_com_dev *ena_dev,
941 struct ena_com_io_sq *io_sq,
942 struct ena_com_io_cq *io_cq)
943 {
944 size_t size;
945
946 if (io_cq->cdesc_addr.virt_addr) {
947 size = io_cq->cdesc_entry_size_in_bytes * io_cq->q_depth;
948
949 dma_free_coherent(ena_dev->dmadev, size,
950 io_cq->cdesc_addr.virt_addr,
951 io_cq->cdesc_addr.phys_addr);
952
953 io_cq->cdesc_addr.virt_addr = NULL;
954 }
955
956 if (io_sq->desc_addr.virt_addr) {
957 size = io_sq->desc_entry_size * io_sq->q_depth;
958
959 dma_free_coherent(ena_dev->dmadev, size,
960 io_sq->desc_addr.virt_addr,
961 io_sq->desc_addr.phys_addr);
962
963 io_sq->desc_addr.virt_addr = NULL;
964 }
965
966 if (io_sq->bounce_buf_ctrl.base_buffer) {
967 devm_kfree(ena_dev->dmadev, io_sq->bounce_buf_ctrl.base_buffer);
968 io_sq->bounce_buf_ctrl.base_buffer = NULL;
969 }
970 }
971
wait_for_reset_state(struct ena_com_dev * ena_dev,u32 timeout,u16 exp_state)972 static int wait_for_reset_state(struct ena_com_dev *ena_dev, u32 timeout,
973 u16 exp_state)
974 {
975 u32 val, exp = 0;
976 unsigned long timeout_stamp;
977
978 /* Convert timeout from resolution of 100ms to us resolution. */
979 timeout_stamp = jiffies + usecs_to_jiffies(100 * 1000 * timeout);
980
981 while (1) {
982 val = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
983
984 if (unlikely(val == ENA_MMIO_READ_TIMEOUT)) {
985 netdev_err(ena_dev->net_device,
986 "Reg read timeout occurred\n");
987 return -ETIME;
988 }
989
990 if ((val & ENA_REGS_DEV_STS_RESET_IN_PROGRESS_MASK) ==
991 exp_state)
992 return 0;
993
994 if (time_is_before_jiffies(timeout_stamp))
995 return -ETIME;
996
997 ena_delay_exponential_backoff_us(exp++, ena_dev->ena_min_poll_delay_us);
998 }
999 }
1000
ena_com_check_supported_feature_id(struct ena_com_dev * ena_dev,enum ena_admin_aq_feature_id feature_id)1001 static bool ena_com_check_supported_feature_id(struct ena_com_dev *ena_dev,
1002 enum ena_admin_aq_feature_id feature_id)
1003 {
1004 u32 feature_mask = 1 << feature_id;
1005
1006 /* Device attributes is always supported */
1007 if ((feature_id != ENA_ADMIN_DEVICE_ATTRIBUTES) &&
1008 !(ena_dev->supported_features & feature_mask))
1009 return false;
1010
1011 return true;
1012 }
1013
ena_com_get_feature_ex(struct ena_com_dev * ena_dev,struct ena_admin_get_feat_resp * get_resp,enum ena_admin_aq_feature_id feature_id,dma_addr_t control_buf_dma_addr,u32 control_buff_size,u8 feature_ver)1014 static int ena_com_get_feature_ex(struct ena_com_dev *ena_dev,
1015 struct ena_admin_get_feat_resp *get_resp,
1016 enum ena_admin_aq_feature_id feature_id,
1017 dma_addr_t control_buf_dma_addr,
1018 u32 control_buff_size,
1019 u8 feature_ver)
1020 {
1021 struct ena_com_admin_queue *admin_queue;
1022 struct ena_admin_get_feat_cmd get_cmd;
1023 int ret;
1024
1025 if (!ena_com_check_supported_feature_id(ena_dev, feature_id)) {
1026 netdev_dbg(ena_dev->net_device, "Feature %d isn't supported\n",
1027 feature_id);
1028 return -EOPNOTSUPP;
1029 }
1030
1031 memset(&get_cmd, 0x0, sizeof(get_cmd));
1032 admin_queue = &ena_dev->admin_queue;
1033
1034 get_cmd.aq_common_descriptor.opcode = ENA_ADMIN_GET_FEATURE;
1035
1036 if (control_buff_size)
1037 get_cmd.aq_common_descriptor.flags =
1038 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
1039 else
1040 get_cmd.aq_common_descriptor.flags = 0;
1041
1042 ret = ena_com_mem_addr_set(ena_dev,
1043 &get_cmd.control_buffer.address,
1044 control_buf_dma_addr);
1045 if (unlikely(ret)) {
1046 netdev_err(ena_dev->net_device, "Memory address set failed\n");
1047 return ret;
1048 }
1049
1050 get_cmd.control_buffer.length = control_buff_size;
1051 get_cmd.feat_common.feature_version = feature_ver;
1052 get_cmd.feat_common.feature_id = feature_id;
1053
1054 ret = ena_com_execute_admin_command(admin_queue,
1055 (struct ena_admin_aq_entry *)
1056 &get_cmd,
1057 sizeof(get_cmd),
1058 (struct ena_admin_acq_entry *)
1059 get_resp,
1060 sizeof(*get_resp));
1061
1062 if (unlikely(ret))
1063 netdev_err(ena_dev->net_device,
1064 "Failed to submit get_feature command %d error: %d\n",
1065 feature_id, ret);
1066
1067 return ret;
1068 }
1069
ena_com_get_feature(struct ena_com_dev * ena_dev,struct ena_admin_get_feat_resp * get_resp,enum ena_admin_aq_feature_id feature_id,u8 feature_ver)1070 static int ena_com_get_feature(struct ena_com_dev *ena_dev,
1071 struct ena_admin_get_feat_resp *get_resp,
1072 enum ena_admin_aq_feature_id feature_id,
1073 u8 feature_ver)
1074 {
1075 return ena_com_get_feature_ex(ena_dev,
1076 get_resp,
1077 feature_id,
1078 0,
1079 0,
1080 feature_ver);
1081 }
1082
ena_com_get_current_hash_function(struct ena_com_dev * ena_dev)1083 int ena_com_get_current_hash_function(struct ena_com_dev *ena_dev)
1084 {
1085 return ena_dev->rss.hash_func;
1086 }
1087
ena_com_hash_key_fill_default_key(struct ena_com_dev * ena_dev)1088 static void ena_com_hash_key_fill_default_key(struct ena_com_dev *ena_dev)
1089 {
1090 struct ena_admin_feature_rss_flow_hash_control *hash_key =
1091 (ena_dev->rss).hash_key;
1092
1093 netdev_rss_key_fill(&hash_key->key, sizeof(hash_key->key));
1094 /* The key buffer is stored in the device in an array of
1095 * uint32 elements.
1096 */
1097 hash_key->key_parts = ENA_ADMIN_RSS_KEY_PARTS;
1098 }
1099
ena_com_hash_key_allocate(struct ena_com_dev * ena_dev)1100 static int ena_com_hash_key_allocate(struct ena_com_dev *ena_dev)
1101 {
1102 struct ena_rss *rss = &ena_dev->rss;
1103
1104 if (!ena_com_check_supported_feature_id(ena_dev,
1105 ENA_ADMIN_RSS_HASH_FUNCTION))
1106 return -EOPNOTSUPP;
1107
1108 rss->hash_key =
1109 dma_alloc_coherent(ena_dev->dmadev, sizeof(*rss->hash_key),
1110 &rss->hash_key_dma_addr, GFP_KERNEL);
1111
1112 if (unlikely(!rss->hash_key))
1113 return -ENOMEM;
1114
1115 return 0;
1116 }
1117
ena_com_hash_key_destroy(struct ena_com_dev * ena_dev)1118 static void ena_com_hash_key_destroy(struct ena_com_dev *ena_dev)
1119 {
1120 struct ena_rss *rss = &ena_dev->rss;
1121
1122 if (rss->hash_key)
1123 dma_free_coherent(ena_dev->dmadev, sizeof(*rss->hash_key),
1124 rss->hash_key, rss->hash_key_dma_addr);
1125 rss->hash_key = NULL;
1126 }
1127
ena_com_hash_ctrl_init(struct ena_com_dev * ena_dev)1128 static int ena_com_hash_ctrl_init(struct ena_com_dev *ena_dev)
1129 {
1130 struct ena_rss *rss = &ena_dev->rss;
1131
1132 rss->hash_ctrl =
1133 dma_alloc_coherent(ena_dev->dmadev, sizeof(*rss->hash_ctrl),
1134 &rss->hash_ctrl_dma_addr, GFP_KERNEL);
1135
1136 if (unlikely(!rss->hash_ctrl))
1137 return -ENOMEM;
1138
1139 return 0;
1140 }
1141
ena_com_hash_ctrl_destroy(struct ena_com_dev * ena_dev)1142 static void ena_com_hash_ctrl_destroy(struct ena_com_dev *ena_dev)
1143 {
1144 struct ena_rss *rss = &ena_dev->rss;
1145
1146 if (rss->hash_ctrl)
1147 dma_free_coherent(ena_dev->dmadev, sizeof(*rss->hash_ctrl),
1148 rss->hash_ctrl, rss->hash_ctrl_dma_addr);
1149 rss->hash_ctrl = NULL;
1150 }
1151
ena_com_indirect_table_allocate(struct ena_com_dev * ena_dev,u16 log_size)1152 static int ena_com_indirect_table_allocate(struct ena_com_dev *ena_dev,
1153 u16 log_size)
1154 {
1155 struct ena_rss *rss = &ena_dev->rss;
1156 struct ena_admin_get_feat_resp get_resp;
1157 size_t tbl_size;
1158 int ret;
1159
1160 ret = ena_com_get_feature(ena_dev, &get_resp,
1161 ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG, 0);
1162 if (unlikely(ret))
1163 return ret;
1164
1165 if ((get_resp.u.ind_table.min_size > log_size) ||
1166 (get_resp.u.ind_table.max_size < log_size)) {
1167 netdev_err(ena_dev->net_device,
1168 "Indirect table size doesn't fit. requested size: %d while min is:%d and max %d\n",
1169 1 << log_size, 1 << get_resp.u.ind_table.min_size,
1170 1 << get_resp.u.ind_table.max_size);
1171 return -EINVAL;
1172 }
1173
1174 tbl_size = (1ULL << log_size) *
1175 sizeof(struct ena_admin_rss_ind_table_entry);
1176
1177 rss->rss_ind_tbl =
1178 dma_alloc_coherent(ena_dev->dmadev, tbl_size,
1179 &rss->rss_ind_tbl_dma_addr, GFP_KERNEL);
1180 if (unlikely(!rss->rss_ind_tbl))
1181 goto mem_err1;
1182
1183 tbl_size = (1ULL << log_size) * sizeof(u16);
1184 rss->host_rss_ind_tbl =
1185 devm_kzalloc(ena_dev->dmadev, tbl_size, GFP_KERNEL);
1186 if (unlikely(!rss->host_rss_ind_tbl))
1187 goto mem_err2;
1188
1189 rss->tbl_log_size = log_size;
1190
1191 return 0;
1192
1193 mem_err2:
1194 tbl_size = (1ULL << log_size) *
1195 sizeof(struct ena_admin_rss_ind_table_entry);
1196
1197 dma_free_coherent(ena_dev->dmadev, tbl_size, rss->rss_ind_tbl,
1198 rss->rss_ind_tbl_dma_addr);
1199 rss->rss_ind_tbl = NULL;
1200 mem_err1:
1201 rss->tbl_log_size = 0;
1202 return -ENOMEM;
1203 }
1204
ena_com_indirect_table_destroy(struct ena_com_dev * ena_dev)1205 static void ena_com_indirect_table_destroy(struct ena_com_dev *ena_dev)
1206 {
1207 struct ena_rss *rss = &ena_dev->rss;
1208 size_t tbl_size = (1ULL << rss->tbl_log_size) *
1209 sizeof(struct ena_admin_rss_ind_table_entry);
1210
1211 if (rss->rss_ind_tbl)
1212 dma_free_coherent(ena_dev->dmadev, tbl_size, rss->rss_ind_tbl,
1213 rss->rss_ind_tbl_dma_addr);
1214 rss->rss_ind_tbl = NULL;
1215
1216 if (rss->host_rss_ind_tbl)
1217 devm_kfree(ena_dev->dmadev, rss->host_rss_ind_tbl);
1218 rss->host_rss_ind_tbl = NULL;
1219 }
1220
ena_com_create_io_sq(struct ena_com_dev * ena_dev,struct ena_com_io_sq * io_sq,u16 cq_idx)1221 static int ena_com_create_io_sq(struct ena_com_dev *ena_dev,
1222 struct ena_com_io_sq *io_sq, u16 cq_idx)
1223 {
1224 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1225 struct ena_admin_aq_create_sq_cmd create_cmd;
1226 struct ena_admin_acq_create_sq_resp_desc cmd_completion;
1227 u8 direction;
1228 int ret;
1229
1230 memset(&create_cmd, 0x0, sizeof(create_cmd));
1231
1232 create_cmd.aq_common_descriptor.opcode = ENA_ADMIN_CREATE_SQ;
1233
1234 if (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
1235 direction = ENA_ADMIN_SQ_DIRECTION_TX;
1236 else
1237 direction = ENA_ADMIN_SQ_DIRECTION_RX;
1238
1239 create_cmd.sq_identity |= (direction <<
1240 ENA_ADMIN_AQ_CREATE_SQ_CMD_SQ_DIRECTION_SHIFT) &
1241 ENA_ADMIN_AQ_CREATE_SQ_CMD_SQ_DIRECTION_MASK;
1242
1243 create_cmd.sq_caps_2 |= io_sq->mem_queue_type &
1244 ENA_ADMIN_AQ_CREATE_SQ_CMD_PLACEMENT_POLICY_MASK;
1245
1246 create_cmd.sq_caps_2 |= (ENA_ADMIN_COMPLETION_POLICY_DESC <<
1247 ENA_ADMIN_AQ_CREATE_SQ_CMD_COMPLETION_POLICY_SHIFT) &
1248 ENA_ADMIN_AQ_CREATE_SQ_CMD_COMPLETION_POLICY_MASK;
1249
1250 create_cmd.sq_caps_3 |=
1251 ENA_ADMIN_AQ_CREATE_SQ_CMD_IS_PHYSICALLY_CONTIGUOUS_MASK;
1252
1253 create_cmd.cq_idx = cq_idx;
1254 create_cmd.sq_depth = io_sq->q_depth;
1255
1256 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST) {
1257 ret = ena_com_mem_addr_set(ena_dev,
1258 &create_cmd.sq_ba,
1259 io_sq->desc_addr.phys_addr);
1260 if (unlikely(ret)) {
1261 netdev_err(ena_dev->net_device,
1262 "Memory address set failed\n");
1263 return ret;
1264 }
1265 }
1266
1267 ret = ena_com_execute_admin_command(admin_queue,
1268 (struct ena_admin_aq_entry *)&create_cmd,
1269 sizeof(create_cmd),
1270 (struct ena_admin_acq_entry *)&cmd_completion,
1271 sizeof(cmd_completion));
1272 if (unlikely(ret)) {
1273 netdev_err(ena_dev->net_device,
1274 "Failed to create IO SQ. error: %d\n", ret);
1275 return ret;
1276 }
1277
1278 io_sq->idx = cmd_completion.sq_idx;
1279
1280 io_sq->db_addr = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1281 (uintptr_t)cmd_completion.sq_doorbell_offset);
1282
1283 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
1284 io_sq->header_addr = (u8 __iomem *)((uintptr_t)ena_dev->mem_bar
1285 + cmd_completion.llq_headers_offset);
1286
1287 io_sq->desc_addr.pbuf_dev_addr =
1288 (u8 __iomem *)((uintptr_t)ena_dev->mem_bar +
1289 cmd_completion.llq_descriptors_offset);
1290 }
1291
1292 netdev_dbg(ena_dev->net_device, "Created sq[%u], depth[%u]\n",
1293 io_sq->idx, io_sq->q_depth);
1294
1295 return ret;
1296 }
1297
ena_com_ind_tbl_convert_to_device(struct ena_com_dev * ena_dev)1298 static int ena_com_ind_tbl_convert_to_device(struct ena_com_dev *ena_dev)
1299 {
1300 struct ena_rss *rss = &ena_dev->rss;
1301 struct ena_com_io_sq *io_sq;
1302 u16 qid;
1303 int i;
1304
1305 for (i = 0; i < 1 << rss->tbl_log_size; i++) {
1306 qid = rss->host_rss_ind_tbl[i];
1307 if (qid >= ENA_TOTAL_NUM_QUEUES)
1308 return -EINVAL;
1309
1310 io_sq = &ena_dev->io_sq_queues[qid];
1311
1312 if (io_sq->direction != ENA_COM_IO_QUEUE_DIRECTION_RX)
1313 return -EINVAL;
1314
1315 rss->rss_ind_tbl[i].cq_idx = io_sq->idx;
1316 }
1317
1318 return 0;
1319 }
1320
ena_com_update_intr_delay_resolution(struct ena_com_dev * ena_dev,u16 intr_delay_resolution)1321 static void ena_com_update_intr_delay_resolution(struct ena_com_dev *ena_dev,
1322 u16 intr_delay_resolution)
1323 {
1324 u16 prev_intr_delay_resolution = ena_dev->intr_delay_resolution;
1325
1326 if (unlikely(!intr_delay_resolution)) {
1327 netdev_err(ena_dev->net_device,
1328 "Illegal intr_delay_resolution provided. Going to use default 1 usec resolution\n");
1329 intr_delay_resolution = ENA_DEFAULT_INTR_DELAY_RESOLUTION;
1330 }
1331
1332 /* update Rx */
1333 ena_dev->intr_moder_rx_interval =
1334 ena_dev->intr_moder_rx_interval *
1335 prev_intr_delay_resolution /
1336 intr_delay_resolution;
1337
1338 /* update Tx */
1339 ena_dev->intr_moder_tx_interval =
1340 ena_dev->intr_moder_tx_interval *
1341 prev_intr_delay_resolution /
1342 intr_delay_resolution;
1343
1344 ena_dev->intr_delay_resolution = intr_delay_resolution;
1345 }
1346
1347 /*****************************************************************************/
1348 /******************************* API ******************************/
1349 /*****************************************************************************/
1350
ena_com_execute_admin_command(struct ena_com_admin_queue * admin_queue,struct ena_admin_aq_entry * cmd,size_t cmd_size,struct ena_admin_acq_entry * comp,size_t comp_size)1351 int ena_com_execute_admin_command(struct ena_com_admin_queue *admin_queue,
1352 struct ena_admin_aq_entry *cmd,
1353 size_t cmd_size,
1354 struct ena_admin_acq_entry *comp,
1355 size_t comp_size)
1356 {
1357 struct ena_comp_ctx *comp_ctx;
1358 int ret;
1359
1360 comp_ctx = ena_com_submit_admin_cmd(admin_queue, cmd, cmd_size,
1361 comp, comp_size);
1362 if (IS_ERR(comp_ctx)) {
1363 ret = PTR_ERR(comp_ctx);
1364 if (ret == -ENODEV)
1365 netdev_dbg(admin_queue->ena_dev->net_device,
1366 "Failed to submit command [%d]\n", ret);
1367 else
1368 netdev_err(admin_queue->ena_dev->net_device,
1369 "Failed to submit command [%d]\n", ret);
1370
1371 return ret;
1372 }
1373
1374 ret = ena_com_wait_and_process_admin_cq(comp_ctx, admin_queue);
1375 if (unlikely(ret)) {
1376 if (admin_queue->running_state)
1377 netdev_err(admin_queue->ena_dev->net_device,
1378 "Failed to process command. ret = %d\n", ret);
1379 else
1380 netdev_dbg(admin_queue->ena_dev->net_device,
1381 "Failed to process command. ret = %d\n", ret);
1382 }
1383 return ret;
1384 }
1385
ena_com_create_io_cq(struct ena_com_dev * ena_dev,struct ena_com_io_cq * io_cq)1386 int ena_com_create_io_cq(struct ena_com_dev *ena_dev,
1387 struct ena_com_io_cq *io_cq)
1388 {
1389 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1390 struct ena_admin_aq_create_cq_cmd create_cmd;
1391 struct ena_admin_acq_create_cq_resp_desc cmd_completion;
1392 int ret;
1393
1394 memset(&create_cmd, 0x0, sizeof(create_cmd));
1395
1396 create_cmd.aq_common_descriptor.opcode = ENA_ADMIN_CREATE_CQ;
1397
1398 create_cmd.cq_caps_2 |= (io_cq->cdesc_entry_size_in_bytes / 4) &
1399 ENA_ADMIN_AQ_CREATE_CQ_CMD_CQ_ENTRY_SIZE_WORDS_MASK;
1400 create_cmd.cq_caps_1 |=
1401 ENA_ADMIN_AQ_CREATE_CQ_CMD_INTERRUPT_MODE_ENABLED_MASK;
1402
1403 create_cmd.msix_vector = io_cq->msix_vector;
1404 create_cmd.cq_depth = io_cq->q_depth;
1405
1406 ret = ena_com_mem_addr_set(ena_dev,
1407 &create_cmd.cq_ba,
1408 io_cq->cdesc_addr.phys_addr);
1409 if (unlikely(ret)) {
1410 netdev_err(ena_dev->net_device, "Memory address set failed\n");
1411 return ret;
1412 }
1413
1414 ret = ena_com_execute_admin_command(admin_queue,
1415 (struct ena_admin_aq_entry *)&create_cmd,
1416 sizeof(create_cmd),
1417 (struct ena_admin_acq_entry *)&cmd_completion,
1418 sizeof(cmd_completion));
1419 if (unlikely(ret)) {
1420 netdev_err(ena_dev->net_device,
1421 "Failed to create IO CQ. error: %d\n", ret);
1422 return ret;
1423 }
1424
1425 io_cq->idx = cmd_completion.cq_idx;
1426
1427 io_cq->unmask_reg = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1428 cmd_completion.cq_interrupt_unmask_register_offset);
1429
1430 if (cmd_completion.cq_head_db_register_offset)
1431 io_cq->cq_head_db_reg =
1432 (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1433 cmd_completion.cq_head_db_register_offset);
1434
1435 if (cmd_completion.numa_node_register_offset)
1436 io_cq->numa_node_cfg_reg =
1437 (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1438 cmd_completion.numa_node_register_offset);
1439
1440 netdev_dbg(ena_dev->net_device, "Created cq[%u], depth[%u]\n",
1441 io_cq->idx, io_cq->q_depth);
1442
1443 return ret;
1444 }
1445
ena_com_get_io_handlers(struct ena_com_dev * ena_dev,u16 qid,struct ena_com_io_sq ** io_sq,struct ena_com_io_cq ** io_cq)1446 int ena_com_get_io_handlers(struct ena_com_dev *ena_dev, u16 qid,
1447 struct ena_com_io_sq **io_sq,
1448 struct ena_com_io_cq **io_cq)
1449 {
1450 if (qid >= ENA_TOTAL_NUM_QUEUES) {
1451 netdev_err(ena_dev->net_device,
1452 "Invalid queue number %d but the max is %d\n", qid,
1453 ENA_TOTAL_NUM_QUEUES);
1454 return -EINVAL;
1455 }
1456
1457 *io_sq = &ena_dev->io_sq_queues[qid];
1458 *io_cq = &ena_dev->io_cq_queues[qid];
1459
1460 return 0;
1461 }
1462
ena_com_abort_admin_commands(struct ena_com_dev * ena_dev)1463 void ena_com_abort_admin_commands(struct ena_com_dev *ena_dev)
1464 {
1465 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1466 struct ena_comp_ctx *comp_ctx;
1467 u16 i;
1468
1469 if (!admin_queue->comp_ctx)
1470 return;
1471
1472 for (i = 0; i < admin_queue->q_depth; i++) {
1473 comp_ctx = get_comp_ctxt(admin_queue, i, false);
1474 if (unlikely(!comp_ctx))
1475 break;
1476
1477 comp_ctx->status = ENA_CMD_ABORTED;
1478
1479 complete(&comp_ctx->wait_event);
1480 }
1481 }
1482
ena_com_wait_for_abort_completion(struct ena_com_dev * ena_dev)1483 void ena_com_wait_for_abort_completion(struct ena_com_dev *ena_dev)
1484 {
1485 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1486 unsigned long flags = 0;
1487 u32 exp = 0;
1488
1489 spin_lock_irqsave(&admin_queue->q_lock, flags);
1490 while (atomic_read(&admin_queue->outstanding_cmds) != 0) {
1491 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
1492 ena_delay_exponential_backoff_us(exp++,
1493 ena_dev->ena_min_poll_delay_us);
1494 spin_lock_irqsave(&admin_queue->q_lock, flags);
1495 }
1496 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
1497 }
1498
ena_com_destroy_io_cq(struct ena_com_dev * ena_dev,struct ena_com_io_cq * io_cq)1499 int ena_com_destroy_io_cq(struct ena_com_dev *ena_dev,
1500 struct ena_com_io_cq *io_cq)
1501 {
1502 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1503 struct ena_admin_aq_destroy_cq_cmd destroy_cmd;
1504 struct ena_admin_acq_destroy_cq_resp_desc destroy_resp;
1505 int ret;
1506
1507 memset(&destroy_cmd, 0x0, sizeof(destroy_cmd));
1508
1509 destroy_cmd.cq_idx = io_cq->idx;
1510 destroy_cmd.aq_common_descriptor.opcode = ENA_ADMIN_DESTROY_CQ;
1511
1512 ret = ena_com_execute_admin_command(admin_queue,
1513 (struct ena_admin_aq_entry *)&destroy_cmd,
1514 sizeof(destroy_cmd),
1515 (struct ena_admin_acq_entry *)&destroy_resp,
1516 sizeof(destroy_resp));
1517
1518 if (unlikely(ret && (ret != -ENODEV)))
1519 netdev_err(ena_dev->net_device,
1520 "Failed to destroy IO CQ. error: %d\n", ret);
1521
1522 return ret;
1523 }
1524
ena_com_get_admin_running_state(struct ena_com_dev * ena_dev)1525 bool ena_com_get_admin_running_state(struct ena_com_dev *ena_dev)
1526 {
1527 return ena_dev->admin_queue.running_state;
1528 }
1529
ena_com_set_admin_running_state(struct ena_com_dev * ena_dev,bool state)1530 void ena_com_set_admin_running_state(struct ena_com_dev *ena_dev, bool state)
1531 {
1532 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1533 unsigned long flags = 0;
1534
1535 spin_lock_irqsave(&admin_queue->q_lock, flags);
1536 ena_dev->admin_queue.running_state = state;
1537 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
1538 }
1539
ena_com_admin_aenq_enable(struct ena_com_dev * ena_dev)1540 void ena_com_admin_aenq_enable(struct ena_com_dev *ena_dev)
1541 {
1542 u16 depth = ena_dev->aenq.q_depth;
1543
1544 WARN(ena_dev->aenq.head != depth, "Invalid AENQ state\n");
1545
1546 /* Init head_db to mark that all entries in the queue
1547 * are initially available
1548 */
1549 writel(depth, ena_dev->reg_bar + ENA_REGS_AENQ_HEAD_DB_OFF);
1550 }
1551
ena_com_set_aenq_config(struct ena_com_dev * ena_dev,u32 groups_flag)1552 int ena_com_set_aenq_config(struct ena_com_dev *ena_dev, u32 groups_flag)
1553 {
1554 struct ena_com_admin_queue *admin_queue;
1555 struct ena_admin_set_feat_cmd cmd;
1556 struct ena_admin_set_feat_resp resp;
1557 struct ena_admin_get_feat_resp get_resp;
1558 int ret;
1559
1560 ret = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_AENQ_CONFIG, 0);
1561 if (ret) {
1562 dev_info(ena_dev->dmadev, "Can't get aenq configuration\n");
1563 return ret;
1564 }
1565
1566 if ((get_resp.u.aenq.supported_groups & groups_flag) != groups_flag) {
1567 netdev_warn(ena_dev->net_device,
1568 "Trying to set unsupported aenq events. supported flag: 0x%x asked flag: 0x%x\n",
1569 get_resp.u.aenq.supported_groups, groups_flag);
1570 return -EOPNOTSUPP;
1571 }
1572
1573 memset(&cmd, 0x0, sizeof(cmd));
1574 admin_queue = &ena_dev->admin_queue;
1575
1576 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
1577 cmd.aq_common_descriptor.flags = 0;
1578 cmd.feat_common.feature_id = ENA_ADMIN_AENQ_CONFIG;
1579 cmd.u.aenq.enabled_groups = groups_flag;
1580
1581 ret = ena_com_execute_admin_command(admin_queue,
1582 (struct ena_admin_aq_entry *)&cmd,
1583 sizeof(cmd),
1584 (struct ena_admin_acq_entry *)&resp,
1585 sizeof(resp));
1586
1587 if (unlikely(ret))
1588 netdev_err(ena_dev->net_device,
1589 "Failed to config AENQ ret: %d\n", ret);
1590
1591 return ret;
1592 }
1593
ena_com_get_dma_width(struct ena_com_dev * ena_dev)1594 int ena_com_get_dma_width(struct ena_com_dev *ena_dev)
1595 {
1596 u32 caps = ena_com_reg_bar_read32(ena_dev, ENA_REGS_CAPS_OFF);
1597 u32 width;
1598
1599 if (unlikely(caps == ENA_MMIO_READ_TIMEOUT)) {
1600 netdev_err(ena_dev->net_device, "Reg read timeout occurred\n");
1601 return -ETIME;
1602 }
1603
1604 width = (caps & ENA_REGS_CAPS_DMA_ADDR_WIDTH_MASK) >>
1605 ENA_REGS_CAPS_DMA_ADDR_WIDTH_SHIFT;
1606
1607 netdev_dbg(ena_dev->net_device, "ENA dma width: %d\n", width);
1608
1609 if ((width < 32) || width > ENA_MAX_PHYS_ADDR_SIZE_BITS) {
1610 netdev_err(ena_dev->net_device, "DMA width illegal value: %d\n",
1611 width);
1612 return -EINVAL;
1613 }
1614
1615 ena_dev->dma_addr_bits = width;
1616
1617 return width;
1618 }
1619
ena_com_validate_version(struct ena_com_dev * ena_dev)1620 int ena_com_validate_version(struct ena_com_dev *ena_dev)
1621 {
1622 u32 ver;
1623 u32 ctrl_ver;
1624 u32 ctrl_ver_masked;
1625
1626 /* Make sure the ENA version and the controller version are at least
1627 * as the driver expects
1628 */
1629 ver = ena_com_reg_bar_read32(ena_dev, ENA_REGS_VERSION_OFF);
1630 ctrl_ver = ena_com_reg_bar_read32(ena_dev,
1631 ENA_REGS_CONTROLLER_VERSION_OFF);
1632
1633 if (unlikely((ver == ENA_MMIO_READ_TIMEOUT) ||
1634 (ctrl_ver == ENA_MMIO_READ_TIMEOUT))) {
1635 netdev_err(ena_dev->net_device, "Reg read timeout occurred\n");
1636 return -ETIME;
1637 }
1638
1639 dev_info(ena_dev->dmadev, "ENA device version: %d.%d\n",
1640 (ver & ENA_REGS_VERSION_MAJOR_VERSION_MASK) >>
1641 ENA_REGS_VERSION_MAJOR_VERSION_SHIFT,
1642 ver & ENA_REGS_VERSION_MINOR_VERSION_MASK);
1643
1644 dev_info(ena_dev->dmadev,
1645 "ENA controller version: %d.%d.%d implementation version %d\n",
1646 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_MASK) >>
1647 ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_SHIFT,
1648 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_MASK) >>
1649 ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_SHIFT,
1650 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_SUBMINOR_VERSION_MASK),
1651 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_IMPL_ID_MASK) >>
1652 ENA_REGS_CONTROLLER_VERSION_IMPL_ID_SHIFT);
1653
1654 ctrl_ver_masked =
1655 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_MASK) |
1656 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_MASK) |
1657 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_SUBMINOR_VERSION_MASK);
1658
1659 /* Validate the ctrl version without the implementation ID */
1660 if (ctrl_ver_masked < MIN_ENA_CTRL_VER) {
1661 netdev_err(ena_dev->net_device,
1662 "ENA ctrl version is lower than the minimal ctrl version the driver supports\n");
1663 return -1;
1664 }
1665
1666 return 0;
1667 }
1668
1669 static void
ena_com_free_ena_admin_queue_comp_ctx(struct ena_com_dev * ena_dev,struct ena_com_admin_queue * admin_queue)1670 ena_com_free_ena_admin_queue_comp_ctx(struct ena_com_dev *ena_dev,
1671 struct ena_com_admin_queue *admin_queue)
1672
1673 {
1674 if (!admin_queue->comp_ctx)
1675 return;
1676
1677 devm_kfree(ena_dev->dmadev, admin_queue->comp_ctx);
1678
1679 admin_queue->comp_ctx = NULL;
1680 }
1681
ena_com_admin_destroy(struct ena_com_dev * ena_dev)1682 void ena_com_admin_destroy(struct ena_com_dev *ena_dev)
1683 {
1684 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1685 struct ena_com_admin_cq *cq = &admin_queue->cq;
1686 struct ena_com_admin_sq *sq = &admin_queue->sq;
1687 struct ena_com_aenq *aenq = &ena_dev->aenq;
1688 u16 size;
1689
1690 ena_com_free_ena_admin_queue_comp_ctx(ena_dev, admin_queue);
1691
1692 size = ADMIN_SQ_SIZE(admin_queue->q_depth);
1693 if (sq->entries)
1694 dma_free_coherent(ena_dev->dmadev, size, sq->entries,
1695 sq->dma_addr);
1696 sq->entries = NULL;
1697
1698 size = ADMIN_CQ_SIZE(admin_queue->q_depth);
1699 if (cq->entries)
1700 dma_free_coherent(ena_dev->dmadev, size, cq->entries,
1701 cq->dma_addr);
1702 cq->entries = NULL;
1703
1704 size = ADMIN_AENQ_SIZE(aenq->q_depth);
1705 if (ena_dev->aenq.entries)
1706 dma_free_coherent(ena_dev->dmadev, size, aenq->entries,
1707 aenq->dma_addr);
1708 aenq->entries = NULL;
1709 }
1710
ena_com_set_admin_polling_mode(struct ena_com_dev * ena_dev,bool polling)1711 void ena_com_set_admin_polling_mode(struct ena_com_dev *ena_dev, bool polling)
1712 {
1713 u32 mask_value = 0;
1714
1715 if (polling)
1716 mask_value = ENA_REGS_ADMIN_INTR_MASK;
1717
1718 writel(mask_value, ena_dev->reg_bar + ENA_REGS_INTR_MASK_OFF);
1719 ena_dev->admin_queue.polling = polling;
1720 }
1721
ena_com_set_admin_auto_polling_mode(struct ena_com_dev * ena_dev,bool polling)1722 void ena_com_set_admin_auto_polling_mode(struct ena_com_dev *ena_dev,
1723 bool polling)
1724 {
1725 ena_dev->admin_queue.auto_polling = polling;
1726 }
1727
ena_com_mmio_reg_read_request_init(struct ena_com_dev * ena_dev)1728 int ena_com_mmio_reg_read_request_init(struct ena_com_dev *ena_dev)
1729 {
1730 struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1731
1732 spin_lock_init(&mmio_read->lock);
1733 mmio_read->read_resp =
1734 dma_alloc_coherent(ena_dev->dmadev,
1735 sizeof(*mmio_read->read_resp),
1736 &mmio_read->read_resp_dma_addr, GFP_KERNEL);
1737 if (unlikely(!mmio_read->read_resp))
1738 goto err;
1739
1740 ena_com_mmio_reg_read_request_write_dev_addr(ena_dev);
1741
1742 mmio_read->read_resp->req_id = 0x0;
1743 mmio_read->seq_num = 0x0;
1744 mmio_read->readless_supported = true;
1745
1746 return 0;
1747
1748 err:
1749
1750 return -ENOMEM;
1751 }
1752
ena_com_set_mmio_read_mode(struct ena_com_dev * ena_dev,bool readless_supported)1753 void ena_com_set_mmio_read_mode(struct ena_com_dev *ena_dev, bool readless_supported)
1754 {
1755 struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1756
1757 mmio_read->readless_supported = readless_supported;
1758 }
1759
ena_com_mmio_reg_read_request_destroy(struct ena_com_dev * ena_dev)1760 void ena_com_mmio_reg_read_request_destroy(struct ena_com_dev *ena_dev)
1761 {
1762 struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1763
1764 writel(0x0, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_LO_OFF);
1765 writel(0x0, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_HI_OFF);
1766
1767 dma_free_coherent(ena_dev->dmadev, sizeof(*mmio_read->read_resp),
1768 mmio_read->read_resp, mmio_read->read_resp_dma_addr);
1769
1770 mmio_read->read_resp = NULL;
1771 }
1772
ena_com_mmio_reg_read_request_write_dev_addr(struct ena_com_dev * ena_dev)1773 void ena_com_mmio_reg_read_request_write_dev_addr(struct ena_com_dev *ena_dev)
1774 {
1775 struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1776 u32 addr_low, addr_high;
1777
1778 addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(mmio_read->read_resp_dma_addr);
1779 addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(mmio_read->read_resp_dma_addr);
1780
1781 writel(addr_low, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_LO_OFF);
1782 writel(addr_high, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_HI_OFF);
1783 }
1784
ena_com_admin_init(struct ena_com_dev * ena_dev,struct ena_aenq_handlers * aenq_handlers)1785 int ena_com_admin_init(struct ena_com_dev *ena_dev,
1786 struct ena_aenq_handlers *aenq_handlers)
1787 {
1788 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1789 u32 aq_caps, acq_caps, dev_sts, addr_low, addr_high;
1790 int ret;
1791
1792 dev_sts = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
1793
1794 if (unlikely(dev_sts == ENA_MMIO_READ_TIMEOUT)) {
1795 netdev_err(ena_dev->net_device, "Reg read timeout occurred\n");
1796 return -ETIME;
1797 }
1798
1799 if (!(dev_sts & ENA_REGS_DEV_STS_READY_MASK)) {
1800 netdev_err(ena_dev->net_device,
1801 "Device isn't ready, abort com init\n");
1802 return -ENODEV;
1803 }
1804
1805 admin_queue->q_depth = ENA_ADMIN_QUEUE_DEPTH;
1806
1807 admin_queue->q_dmadev = ena_dev->dmadev;
1808 admin_queue->polling = false;
1809 admin_queue->curr_cmd_id = 0;
1810
1811 atomic_set(&admin_queue->outstanding_cmds, 0);
1812
1813 spin_lock_init(&admin_queue->q_lock);
1814
1815 ret = ena_com_init_comp_ctxt(admin_queue);
1816 if (ret)
1817 goto error;
1818
1819 ret = ena_com_admin_init_sq(admin_queue);
1820 if (ret)
1821 goto error;
1822
1823 ret = ena_com_admin_init_cq(admin_queue);
1824 if (ret)
1825 goto error;
1826
1827 admin_queue->sq.db_addr = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1828 ENA_REGS_AQ_DB_OFF);
1829
1830 addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(admin_queue->sq.dma_addr);
1831 addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(admin_queue->sq.dma_addr);
1832
1833 writel(addr_low, ena_dev->reg_bar + ENA_REGS_AQ_BASE_LO_OFF);
1834 writel(addr_high, ena_dev->reg_bar + ENA_REGS_AQ_BASE_HI_OFF);
1835
1836 addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(admin_queue->cq.dma_addr);
1837 addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(admin_queue->cq.dma_addr);
1838
1839 writel(addr_low, ena_dev->reg_bar + ENA_REGS_ACQ_BASE_LO_OFF);
1840 writel(addr_high, ena_dev->reg_bar + ENA_REGS_ACQ_BASE_HI_OFF);
1841
1842 aq_caps = 0;
1843 aq_caps |= admin_queue->q_depth & ENA_REGS_AQ_CAPS_AQ_DEPTH_MASK;
1844 aq_caps |= (sizeof(struct ena_admin_aq_entry) <<
1845 ENA_REGS_AQ_CAPS_AQ_ENTRY_SIZE_SHIFT) &
1846 ENA_REGS_AQ_CAPS_AQ_ENTRY_SIZE_MASK;
1847
1848 acq_caps = 0;
1849 acq_caps |= admin_queue->q_depth & ENA_REGS_ACQ_CAPS_ACQ_DEPTH_MASK;
1850 acq_caps |= (sizeof(struct ena_admin_acq_entry) <<
1851 ENA_REGS_ACQ_CAPS_ACQ_ENTRY_SIZE_SHIFT) &
1852 ENA_REGS_ACQ_CAPS_ACQ_ENTRY_SIZE_MASK;
1853
1854 writel(aq_caps, ena_dev->reg_bar + ENA_REGS_AQ_CAPS_OFF);
1855 writel(acq_caps, ena_dev->reg_bar + ENA_REGS_ACQ_CAPS_OFF);
1856 ret = ena_com_admin_init_aenq(ena_dev, aenq_handlers);
1857 if (ret)
1858 goto error;
1859
1860 admin_queue->ena_dev = ena_dev;
1861 admin_queue->running_state = true;
1862
1863 return 0;
1864 error:
1865 ena_com_admin_destroy(ena_dev);
1866
1867 return ret;
1868 }
1869
ena_com_create_io_queue(struct ena_com_dev * ena_dev,struct ena_com_create_io_ctx * ctx)1870 int ena_com_create_io_queue(struct ena_com_dev *ena_dev,
1871 struct ena_com_create_io_ctx *ctx)
1872 {
1873 struct ena_com_io_sq *io_sq;
1874 struct ena_com_io_cq *io_cq;
1875 int ret;
1876
1877 if (ctx->qid >= ENA_TOTAL_NUM_QUEUES) {
1878 netdev_err(ena_dev->net_device,
1879 "Qid (%d) is bigger than max num of queues (%d)\n",
1880 ctx->qid, ENA_TOTAL_NUM_QUEUES);
1881 return -EINVAL;
1882 }
1883
1884 io_sq = &ena_dev->io_sq_queues[ctx->qid];
1885 io_cq = &ena_dev->io_cq_queues[ctx->qid];
1886
1887 memset(io_sq, 0x0, sizeof(*io_sq));
1888 memset(io_cq, 0x0, sizeof(*io_cq));
1889
1890 /* Init CQ */
1891 io_cq->q_depth = ctx->queue_size;
1892 io_cq->direction = ctx->direction;
1893 io_cq->qid = ctx->qid;
1894
1895 io_cq->msix_vector = ctx->msix_vector;
1896
1897 io_sq->q_depth = ctx->queue_size;
1898 io_sq->direction = ctx->direction;
1899 io_sq->qid = ctx->qid;
1900
1901 io_sq->mem_queue_type = ctx->mem_queue_type;
1902
1903 if (ctx->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
1904 /* header length is limited to 8 bits */
1905 io_sq->tx_max_header_size =
1906 min_t(u32, ena_dev->tx_max_header_size, SZ_256);
1907
1908 ret = ena_com_init_io_sq(ena_dev, ctx, io_sq);
1909 if (ret)
1910 goto error;
1911 ret = ena_com_init_io_cq(ena_dev, ctx, io_cq);
1912 if (ret)
1913 goto error;
1914
1915 ret = ena_com_create_io_cq(ena_dev, io_cq);
1916 if (ret)
1917 goto error;
1918
1919 ret = ena_com_create_io_sq(ena_dev, io_sq, io_cq->idx);
1920 if (ret)
1921 goto destroy_io_cq;
1922
1923 return 0;
1924
1925 destroy_io_cq:
1926 ena_com_destroy_io_cq(ena_dev, io_cq);
1927 error:
1928 ena_com_io_queue_free(ena_dev, io_sq, io_cq);
1929 return ret;
1930 }
1931
ena_com_destroy_io_queue(struct ena_com_dev * ena_dev,u16 qid)1932 void ena_com_destroy_io_queue(struct ena_com_dev *ena_dev, u16 qid)
1933 {
1934 struct ena_com_io_sq *io_sq;
1935 struct ena_com_io_cq *io_cq;
1936
1937 if (qid >= ENA_TOTAL_NUM_QUEUES) {
1938 netdev_err(ena_dev->net_device,
1939 "Qid (%d) is bigger than max num of queues (%d)\n",
1940 qid, ENA_TOTAL_NUM_QUEUES);
1941 return;
1942 }
1943
1944 io_sq = &ena_dev->io_sq_queues[qid];
1945 io_cq = &ena_dev->io_cq_queues[qid];
1946
1947 ena_com_destroy_io_sq(ena_dev, io_sq);
1948 ena_com_destroy_io_cq(ena_dev, io_cq);
1949
1950 ena_com_io_queue_free(ena_dev, io_sq, io_cq);
1951 }
1952
ena_com_get_link_params(struct ena_com_dev * ena_dev,struct ena_admin_get_feat_resp * resp)1953 int ena_com_get_link_params(struct ena_com_dev *ena_dev,
1954 struct ena_admin_get_feat_resp *resp)
1955 {
1956 return ena_com_get_feature(ena_dev, resp, ENA_ADMIN_LINK_CONFIG, 0);
1957 }
1958
ena_com_get_dev_attr_feat(struct ena_com_dev * ena_dev,struct ena_com_dev_get_features_ctx * get_feat_ctx)1959 int ena_com_get_dev_attr_feat(struct ena_com_dev *ena_dev,
1960 struct ena_com_dev_get_features_ctx *get_feat_ctx)
1961 {
1962 struct ena_admin_get_feat_resp get_resp;
1963 int rc;
1964
1965 rc = ena_com_get_feature(ena_dev, &get_resp,
1966 ENA_ADMIN_DEVICE_ATTRIBUTES, 0);
1967 if (rc)
1968 return rc;
1969
1970 memcpy(&get_feat_ctx->dev_attr, &get_resp.u.dev_attr,
1971 sizeof(get_resp.u.dev_attr));
1972
1973 ena_dev->supported_features = get_resp.u.dev_attr.supported_features;
1974 ena_dev->capabilities = get_resp.u.dev_attr.capabilities;
1975
1976 if (ena_dev->supported_features & BIT(ENA_ADMIN_MAX_QUEUES_EXT)) {
1977 rc = ena_com_get_feature(ena_dev, &get_resp,
1978 ENA_ADMIN_MAX_QUEUES_EXT,
1979 ENA_FEATURE_MAX_QUEUE_EXT_VER);
1980 if (rc)
1981 return rc;
1982
1983 if (get_resp.u.max_queue_ext.version !=
1984 ENA_FEATURE_MAX_QUEUE_EXT_VER)
1985 return -EINVAL;
1986
1987 memcpy(&get_feat_ctx->max_queue_ext, &get_resp.u.max_queue_ext,
1988 sizeof(get_resp.u.max_queue_ext));
1989 ena_dev->tx_max_header_size =
1990 get_resp.u.max_queue_ext.max_queue_ext.max_tx_header_size;
1991 } else {
1992 rc = ena_com_get_feature(ena_dev, &get_resp,
1993 ENA_ADMIN_MAX_QUEUES_NUM, 0);
1994 memcpy(&get_feat_ctx->max_queues, &get_resp.u.max_queue,
1995 sizeof(get_resp.u.max_queue));
1996 ena_dev->tx_max_header_size =
1997 get_resp.u.max_queue.max_header_size;
1998
1999 if (rc)
2000 return rc;
2001 }
2002
2003 rc = ena_com_get_feature(ena_dev, &get_resp,
2004 ENA_ADMIN_AENQ_CONFIG, 0);
2005 if (rc)
2006 return rc;
2007
2008 memcpy(&get_feat_ctx->aenq, &get_resp.u.aenq,
2009 sizeof(get_resp.u.aenq));
2010
2011 rc = ena_com_get_feature(ena_dev, &get_resp,
2012 ENA_ADMIN_STATELESS_OFFLOAD_CONFIG, 0);
2013 if (rc)
2014 return rc;
2015
2016 memcpy(&get_feat_ctx->offload, &get_resp.u.offload,
2017 sizeof(get_resp.u.offload));
2018
2019 /* Driver hints isn't mandatory admin command. So in case the
2020 * command isn't supported set driver hints to 0
2021 */
2022 rc = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_HW_HINTS, 0);
2023
2024 if (!rc)
2025 memcpy(&get_feat_ctx->hw_hints, &get_resp.u.hw_hints,
2026 sizeof(get_resp.u.hw_hints));
2027 else if (rc == -EOPNOTSUPP)
2028 memset(&get_feat_ctx->hw_hints, 0x0,
2029 sizeof(get_feat_ctx->hw_hints));
2030 else
2031 return rc;
2032
2033 rc = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_LLQ, 0);
2034 if (!rc)
2035 memcpy(&get_feat_ctx->llq, &get_resp.u.llq,
2036 sizeof(get_resp.u.llq));
2037 else if (rc == -EOPNOTSUPP)
2038 memset(&get_feat_ctx->llq, 0x0, sizeof(get_feat_ctx->llq));
2039 else
2040 return rc;
2041
2042 return 0;
2043 }
2044
ena_com_admin_q_comp_intr_handler(struct ena_com_dev * ena_dev)2045 void ena_com_admin_q_comp_intr_handler(struct ena_com_dev *ena_dev)
2046 {
2047 ena_com_handle_admin_completion(&ena_dev->admin_queue);
2048 }
2049
2050 /* ena_handle_specific_aenq_event:
2051 * return the handler that is relevant to the specific event group
2052 */
ena_com_get_specific_aenq_cb(struct ena_com_dev * ena_dev,u16 group)2053 static ena_aenq_handler ena_com_get_specific_aenq_cb(struct ena_com_dev *ena_dev,
2054 u16 group)
2055 {
2056 struct ena_aenq_handlers *aenq_handlers = ena_dev->aenq.aenq_handlers;
2057
2058 if ((group < ENA_MAX_HANDLERS) && aenq_handlers->handlers[group])
2059 return aenq_handlers->handlers[group];
2060
2061 return aenq_handlers->unimplemented_handler;
2062 }
2063
2064 /* ena_aenq_intr_handler:
2065 * handles the aenq incoming events.
2066 * pop events from the queue and apply the specific handler
2067 */
ena_com_aenq_intr_handler(struct ena_com_dev * ena_dev,void * data)2068 void ena_com_aenq_intr_handler(struct ena_com_dev *ena_dev, void *data)
2069 {
2070 struct ena_admin_aenq_entry *aenq_e;
2071 struct ena_admin_aenq_common_desc *aenq_common;
2072 struct ena_com_aenq *aenq = &ena_dev->aenq;
2073 u64 timestamp;
2074 ena_aenq_handler handler_cb;
2075 u16 masked_head, processed = 0;
2076 u8 phase;
2077
2078 masked_head = aenq->head & (aenq->q_depth - 1);
2079 phase = aenq->phase;
2080 aenq_e = &aenq->entries[masked_head]; /* Get first entry */
2081 aenq_common = &aenq_e->aenq_common_desc;
2082
2083 /* Go over all the events */
2084 while ((READ_ONCE(aenq_common->flags) &
2085 ENA_ADMIN_AENQ_COMMON_DESC_PHASE_MASK) == phase) {
2086 /* Make sure the phase bit (ownership) is as expected before
2087 * reading the rest of the descriptor.
2088 */
2089 dma_rmb();
2090
2091 timestamp = (u64)aenq_common->timestamp_low |
2092 ((u64)aenq_common->timestamp_high << 32);
2093
2094 netdev_dbg(ena_dev->net_device,
2095 "AENQ! Group[%x] Syndrome[%x] timestamp: [%llus]\n",
2096 aenq_common->group, aenq_common->syndrome, timestamp);
2097
2098 /* Handle specific event*/
2099 handler_cb = ena_com_get_specific_aenq_cb(ena_dev,
2100 aenq_common->group);
2101 handler_cb(data, aenq_e); /* call the actual event handler*/
2102
2103 /* Get next event entry */
2104 masked_head++;
2105 processed++;
2106
2107 if (unlikely(masked_head == aenq->q_depth)) {
2108 masked_head = 0;
2109 phase = !phase;
2110 }
2111 aenq_e = &aenq->entries[masked_head];
2112 aenq_common = &aenq_e->aenq_common_desc;
2113 }
2114
2115 aenq->head += processed;
2116 aenq->phase = phase;
2117
2118 /* Don't update aenq doorbell if there weren't any processed events */
2119 if (!processed)
2120 return;
2121
2122 /* write the aenq doorbell after all AENQ descriptors were read */
2123 mb();
2124 writel_relaxed((u32)aenq->head,
2125 ena_dev->reg_bar + ENA_REGS_AENQ_HEAD_DB_OFF);
2126 }
2127
ena_com_dev_reset(struct ena_com_dev * ena_dev,enum ena_regs_reset_reason_types reset_reason)2128 int ena_com_dev_reset(struct ena_com_dev *ena_dev,
2129 enum ena_regs_reset_reason_types reset_reason)
2130 {
2131 u32 stat, timeout, cap, reset_val;
2132 int rc;
2133
2134 stat = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
2135 cap = ena_com_reg_bar_read32(ena_dev, ENA_REGS_CAPS_OFF);
2136
2137 if (unlikely((stat == ENA_MMIO_READ_TIMEOUT) ||
2138 (cap == ENA_MMIO_READ_TIMEOUT))) {
2139 netdev_err(ena_dev->net_device, "Reg read32 timeout occurred\n");
2140 return -ETIME;
2141 }
2142
2143 if ((stat & ENA_REGS_DEV_STS_READY_MASK) == 0) {
2144 netdev_err(ena_dev->net_device,
2145 "Device isn't ready, can't reset device\n");
2146 return -EINVAL;
2147 }
2148
2149 timeout = (cap & ENA_REGS_CAPS_RESET_TIMEOUT_MASK) >>
2150 ENA_REGS_CAPS_RESET_TIMEOUT_SHIFT;
2151 if (timeout == 0) {
2152 netdev_err(ena_dev->net_device, "Invalid timeout value\n");
2153 return -EINVAL;
2154 }
2155
2156 /* start reset */
2157 reset_val = ENA_REGS_DEV_CTL_DEV_RESET_MASK;
2158 reset_val |= (reset_reason << ENA_REGS_DEV_CTL_RESET_REASON_SHIFT) &
2159 ENA_REGS_DEV_CTL_RESET_REASON_MASK;
2160 writel(reset_val, ena_dev->reg_bar + ENA_REGS_DEV_CTL_OFF);
2161
2162 /* Write again the MMIO read request address */
2163 ena_com_mmio_reg_read_request_write_dev_addr(ena_dev);
2164
2165 rc = wait_for_reset_state(ena_dev, timeout,
2166 ENA_REGS_DEV_STS_RESET_IN_PROGRESS_MASK);
2167 if (rc != 0) {
2168 netdev_err(ena_dev->net_device,
2169 "Reset indication didn't turn on\n");
2170 return rc;
2171 }
2172
2173 /* reset done */
2174 writel(0, ena_dev->reg_bar + ENA_REGS_DEV_CTL_OFF);
2175 rc = wait_for_reset_state(ena_dev, timeout, 0);
2176 if (rc != 0) {
2177 netdev_err(ena_dev->net_device,
2178 "Reset indication didn't turn off\n");
2179 return rc;
2180 }
2181
2182 timeout = (cap & ENA_REGS_CAPS_ADMIN_CMD_TO_MASK) >>
2183 ENA_REGS_CAPS_ADMIN_CMD_TO_SHIFT;
2184 if (timeout)
2185 /* the resolution of timeout reg is 100ms */
2186 ena_dev->admin_queue.completion_timeout = timeout * 100000;
2187 else
2188 ena_dev->admin_queue.completion_timeout = ADMIN_CMD_TIMEOUT_US;
2189
2190 return 0;
2191 }
2192
ena_get_dev_stats(struct ena_com_dev * ena_dev,struct ena_com_stats_ctx * ctx,enum ena_admin_get_stats_type type)2193 static int ena_get_dev_stats(struct ena_com_dev *ena_dev,
2194 struct ena_com_stats_ctx *ctx,
2195 enum ena_admin_get_stats_type type)
2196 {
2197 struct ena_admin_aq_get_stats_cmd *get_cmd = &ctx->get_cmd;
2198 struct ena_admin_acq_get_stats_resp *get_resp = &ctx->get_resp;
2199 struct ena_com_admin_queue *admin_queue;
2200 int ret;
2201
2202 admin_queue = &ena_dev->admin_queue;
2203
2204 get_cmd->aq_common_descriptor.opcode = ENA_ADMIN_GET_STATS;
2205 get_cmd->aq_common_descriptor.flags = 0;
2206 get_cmd->type = type;
2207
2208 ret = ena_com_execute_admin_command(admin_queue,
2209 (struct ena_admin_aq_entry *)get_cmd,
2210 sizeof(*get_cmd),
2211 (struct ena_admin_acq_entry *)get_resp,
2212 sizeof(*get_resp));
2213
2214 if (unlikely(ret))
2215 netdev_err(ena_dev->net_device,
2216 "Failed to get stats. error: %d\n", ret);
2217
2218 return ret;
2219 }
2220
ena_com_get_eni_stats(struct ena_com_dev * ena_dev,struct ena_admin_eni_stats * stats)2221 int ena_com_get_eni_stats(struct ena_com_dev *ena_dev,
2222 struct ena_admin_eni_stats *stats)
2223 {
2224 struct ena_com_stats_ctx ctx;
2225 int ret;
2226
2227 if (!ena_com_get_cap(ena_dev, ENA_ADMIN_ENI_STATS)) {
2228 netdev_err(ena_dev->net_device,
2229 "Capability %d isn't supported\n",
2230 ENA_ADMIN_ENI_STATS);
2231 return -EOPNOTSUPP;
2232 }
2233
2234 memset(&ctx, 0x0, sizeof(ctx));
2235 ret = ena_get_dev_stats(ena_dev, &ctx, ENA_ADMIN_GET_STATS_TYPE_ENI);
2236 if (likely(ret == 0))
2237 memcpy(stats, &ctx.get_resp.u.eni_stats,
2238 sizeof(ctx.get_resp.u.eni_stats));
2239
2240 return ret;
2241 }
2242
ena_com_get_dev_basic_stats(struct ena_com_dev * ena_dev,struct ena_admin_basic_stats * stats)2243 int ena_com_get_dev_basic_stats(struct ena_com_dev *ena_dev,
2244 struct ena_admin_basic_stats *stats)
2245 {
2246 struct ena_com_stats_ctx ctx;
2247 int ret;
2248
2249 memset(&ctx, 0x0, sizeof(ctx));
2250 ret = ena_get_dev_stats(ena_dev, &ctx, ENA_ADMIN_GET_STATS_TYPE_BASIC);
2251 if (likely(ret == 0))
2252 memcpy(stats, &ctx.get_resp.u.basic_stats,
2253 sizeof(ctx.get_resp.u.basic_stats));
2254
2255 return ret;
2256 }
2257
ena_com_set_dev_mtu(struct ena_com_dev * ena_dev,u32 mtu)2258 int ena_com_set_dev_mtu(struct ena_com_dev *ena_dev, u32 mtu)
2259 {
2260 struct ena_com_admin_queue *admin_queue;
2261 struct ena_admin_set_feat_cmd cmd;
2262 struct ena_admin_set_feat_resp resp;
2263 int ret;
2264
2265 if (!ena_com_check_supported_feature_id(ena_dev, ENA_ADMIN_MTU)) {
2266 netdev_dbg(ena_dev->net_device, "Feature %d isn't supported\n",
2267 ENA_ADMIN_MTU);
2268 return -EOPNOTSUPP;
2269 }
2270
2271 memset(&cmd, 0x0, sizeof(cmd));
2272 admin_queue = &ena_dev->admin_queue;
2273
2274 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2275 cmd.aq_common_descriptor.flags = 0;
2276 cmd.feat_common.feature_id = ENA_ADMIN_MTU;
2277 cmd.u.mtu.mtu = mtu;
2278
2279 ret = ena_com_execute_admin_command(admin_queue,
2280 (struct ena_admin_aq_entry *)&cmd,
2281 sizeof(cmd),
2282 (struct ena_admin_acq_entry *)&resp,
2283 sizeof(resp));
2284
2285 if (unlikely(ret))
2286 netdev_err(ena_dev->net_device,
2287 "Failed to set mtu %d. error: %d\n", mtu, ret);
2288
2289 return ret;
2290 }
2291
ena_com_get_offload_settings(struct ena_com_dev * ena_dev,struct ena_admin_feature_offload_desc * offload)2292 int ena_com_get_offload_settings(struct ena_com_dev *ena_dev,
2293 struct ena_admin_feature_offload_desc *offload)
2294 {
2295 int ret;
2296 struct ena_admin_get_feat_resp resp;
2297
2298 ret = ena_com_get_feature(ena_dev, &resp,
2299 ENA_ADMIN_STATELESS_OFFLOAD_CONFIG, 0);
2300 if (unlikely(ret)) {
2301 netdev_err(ena_dev->net_device,
2302 "Failed to get offload capabilities %d\n", ret);
2303 return ret;
2304 }
2305
2306 memcpy(offload, &resp.u.offload, sizeof(resp.u.offload));
2307
2308 return 0;
2309 }
2310
ena_com_set_hash_function(struct ena_com_dev * ena_dev)2311 int ena_com_set_hash_function(struct ena_com_dev *ena_dev)
2312 {
2313 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
2314 struct ena_rss *rss = &ena_dev->rss;
2315 struct ena_admin_set_feat_cmd cmd;
2316 struct ena_admin_set_feat_resp resp;
2317 struct ena_admin_get_feat_resp get_resp;
2318 int ret;
2319
2320 if (!ena_com_check_supported_feature_id(ena_dev,
2321 ENA_ADMIN_RSS_HASH_FUNCTION)) {
2322 netdev_dbg(ena_dev->net_device, "Feature %d isn't supported\n",
2323 ENA_ADMIN_RSS_HASH_FUNCTION);
2324 return -EOPNOTSUPP;
2325 }
2326
2327 /* Validate hash function is supported */
2328 ret = ena_com_get_feature(ena_dev, &get_resp,
2329 ENA_ADMIN_RSS_HASH_FUNCTION, 0);
2330 if (unlikely(ret))
2331 return ret;
2332
2333 if (!(get_resp.u.flow_hash_func.supported_func & BIT(rss->hash_func))) {
2334 netdev_err(ena_dev->net_device,
2335 "Func hash %d isn't supported by device, abort\n",
2336 rss->hash_func);
2337 return -EOPNOTSUPP;
2338 }
2339
2340 memset(&cmd, 0x0, sizeof(cmd));
2341
2342 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2343 cmd.aq_common_descriptor.flags =
2344 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
2345 cmd.feat_common.feature_id = ENA_ADMIN_RSS_HASH_FUNCTION;
2346 cmd.u.flow_hash_func.init_val = rss->hash_init_val;
2347 cmd.u.flow_hash_func.selected_func = 1 << rss->hash_func;
2348
2349 ret = ena_com_mem_addr_set(ena_dev,
2350 &cmd.control_buffer.address,
2351 rss->hash_key_dma_addr);
2352 if (unlikely(ret)) {
2353 netdev_err(ena_dev->net_device, "Memory address set failed\n");
2354 return ret;
2355 }
2356
2357 cmd.control_buffer.length = sizeof(*rss->hash_key);
2358
2359 ret = ena_com_execute_admin_command(admin_queue,
2360 (struct ena_admin_aq_entry *)&cmd,
2361 sizeof(cmd),
2362 (struct ena_admin_acq_entry *)&resp,
2363 sizeof(resp));
2364 if (unlikely(ret)) {
2365 netdev_err(ena_dev->net_device,
2366 "Failed to set hash function %d. error: %d\n",
2367 rss->hash_func, ret);
2368 return -EINVAL;
2369 }
2370
2371 return 0;
2372 }
2373
ena_com_fill_hash_function(struct ena_com_dev * ena_dev,enum ena_admin_hash_functions func,const u8 * key,u16 key_len,u32 init_val)2374 int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
2375 enum ena_admin_hash_functions func,
2376 const u8 *key, u16 key_len, u32 init_val)
2377 {
2378 struct ena_admin_feature_rss_flow_hash_control *hash_key;
2379 struct ena_admin_get_feat_resp get_resp;
2380 enum ena_admin_hash_functions old_func;
2381 struct ena_rss *rss = &ena_dev->rss;
2382 int rc;
2383
2384 hash_key = rss->hash_key;
2385
2386 /* Make sure size is a mult of DWs */
2387 if (unlikely(key_len & 0x3))
2388 return -EINVAL;
2389
2390 rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2391 ENA_ADMIN_RSS_HASH_FUNCTION,
2392 rss->hash_key_dma_addr,
2393 sizeof(*rss->hash_key), 0);
2394 if (unlikely(rc))
2395 return rc;
2396
2397 if (!(BIT(func) & get_resp.u.flow_hash_func.supported_func)) {
2398 netdev_err(ena_dev->net_device,
2399 "Flow hash function %d isn't supported\n", func);
2400 return -EOPNOTSUPP;
2401 }
2402
2403 if ((func == ENA_ADMIN_TOEPLITZ) && key) {
2404 if (key_len != sizeof(hash_key->key)) {
2405 netdev_err(ena_dev->net_device,
2406 "key len (%u) doesn't equal the supported size (%zu)\n",
2407 key_len, sizeof(hash_key->key));
2408 return -EINVAL;
2409 }
2410 memcpy(hash_key->key, key, key_len);
2411 hash_key->key_parts = key_len / sizeof(hash_key->key[0]);
2412 }
2413
2414 rss->hash_init_val = init_val;
2415 old_func = rss->hash_func;
2416 rss->hash_func = func;
2417 rc = ena_com_set_hash_function(ena_dev);
2418
2419 /* Restore the old function */
2420 if (unlikely(rc))
2421 rss->hash_func = old_func;
2422
2423 return rc;
2424 }
2425
ena_com_get_hash_function(struct ena_com_dev * ena_dev,enum ena_admin_hash_functions * func)2426 int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
2427 enum ena_admin_hash_functions *func)
2428 {
2429 struct ena_rss *rss = &ena_dev->rss;
2430 struct ena_admin_get_feat_resp get_resp;
2431 int rc;
2432
2433 if (unlikely(!func))
2434 return -EINVAL;
2435
2436 rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2437 ENA_ADMIN_RSS_HASH_FUNCTION,
2438 rss->hash_key_dma_addr,
2439 sizeof(*rss->hash_key), 0);
2440 if (unlikely(rc))
2441 return rc;
2442
2443 /* ffs() returns 1 in case the lsb is set */
2444 rss->hash_func = ffs(get_resp.u.flow_hash_func.selected_func);
2445 if (rss->hash_func)
2446 rss->hash_func--;
2447
2448 *func = rss->hash_func;
2449
2450 return 0;
2451 }
2452
ena_com_get_hash_key(struct ena_com_dev * ena_dev,u8 * key)2453 int ena_com_get_hash_key(struct ena_com_dev *ena_dev, u8 *key)
2454 {
2455 struct ena_admin_feature_rss_flow_hash_control *hash_key =
2456 ena_dev->rss.hash_key;
2457
2458 if (key)
2459 memcpy(key, hash_key->key,
2460 (size_t)(hash_key->key_parts) * sizeof(hash_key->key[0]));
2461
2462 return 0;
2463 }
2464
ena_com_get_hash_ctrl(struct ena_com_dev * ena_dev,enum ena_admin_flow_hash_proto proto,u16 * fields)2465 int ena_com_get_hash_ctrl(struct ena_com_dev *ena_dev,
2466 enum ena_admin_flow_hash_proto proto,
2467 u16 *fields)
2468 {
2469 struct ena_rss *rss = &ena_dev->rss;
2470 struct ena_admin_get_feat_resp get_resp;
2471 int rc;
2472
2473 rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2474 ENA_ADMIN_RSS_HASH_INPUT,
2475 rss->hash_ctrl_dma_addr,
2476 sizeof(*rss->hash_ctrl), 0);
2477 if (unlikely(rc))
2478 return rc;
2479
2480 if (fields)
2481 *fields = rss->hash_ctrl->selected_fields[proto].fields;
2482
2483 return 0;
2484 }
2485
ena_com_set_hash_ctrl(struct ena_com_dev * ena_dev)2486 int ena_com_set_hash_ctrl(struct ena_com_dev *ena_dev)
2487 {
2488 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
2489 struct ena_rss *rss = &ena_dev->rss;
2490 struct ena_admin_feature_rss_hash_control *hash_ctrl = rss->hash_ctrl;
2491 struct ena_admin_set_feat_cmd cmd;
2492 struct ena_admin_set_feat_resp resp;
2493 int ret;
2494
2495 if (!ena_com_check_supported_feature_id(ena_dev,
2496 ENA_ADMIN_RSS_HASH_INPUT)) {
2497 netdev_dbg(ena_dev->net_device, "Feature %d isn't supported\n",
2498 ENA_ADMIN_RSS_HASH_INPUT);
2499 return -EOPNOTSUPP;
2500 }
2501
2502 memset(&cmd, 0x0, sizeof(cmd));
2503
2504 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2505 cmd.aq_common_descriptor.flags =
2506 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
2507 cmd.feat_common.feature_id = ENA_ADMIN_RSS_HASH_INPUT;
2508 cmd.u.flow_hash_input.enabled_input_sort =
2509 ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L3_SORT_MASK |
2510 ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L4_SORT_MASK;
2511
2512 ret = ena_com_mem_addr_set(ena_dev,
2513 &cmd.control_buffer.address,
2514 rss->hash_ctrl_dma_addr);
2515 if (unlikely(ret)) {
2516 netdev_err(ena_dev->net_device, "Memory address set failed\n");
2517 return ret;
2518 }
2519 cmd.control_buffer.length = sizeof(*hash_ctrl);
2520
2521 ret = ena_com_execute_admin_command(admin_queue,
2522 (struct ena_admin_aq_entry *)&cmd,
2523 sizeof(cmd),
2524 (struct ena_admin_acq_entry *)&resp,
2525 sizeof(resp));
2526 if (unlikely(ret))
2527 netdev_err(ena_dev->net_device,
2528 "Failed to set hash input. error: %d\n", ret);
2529
2530 return ret;
2531 }
2532
ena_com_set_default_hash_ctrl(struct ena_com_dev * ena_dev)2533 int ena_com_set_default_hash_ctrl(struct ena_com_dev *ena_dev)
2534 {
2535 struct ena_rss *rss = &ena_dev->rss;
2536 struct ena_admin_feature_rss_hash_control *hash_ctrl =
2537 rss->hash_ctrl;
2538 u16 available_fields = 0;
2539 int rc, i;
2540
2541 /* Get the supported hash input */
2542 rc = ena_com_get_hash_ctrl(ena_dev, 0, NULL);
2543 if (unlikely(rc))
2544 return rc;
2545
2546 hash_ctrl->selected_fields[ENA_ADMIN_RSS_TCP4].fields =
2547 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2548 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2549
2550 hash_ctrl->selected_fields[ENA_ADMIN_RSS_UDP4].fields =
2551 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2552 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2553
2554 hash_ctrl->selected_fields[ENA_ADMIN_RSS_TCP6].fields =
2555 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2556 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2557
2558 hash_ctrl->selected_fields[ENA_ADMIN_RSS_UDP6].fields =
2559 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2560 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2561
2562 hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP4].fields =
2563 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
2564
2565 hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP6].fields =
2566 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
2567
2568 hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP4_FRAG].fields =
2569 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
2570
2571 hash_ctrl->selected_fields[ENA_ADMIN_RSS_NOT_IP].fields =
2572 ENA_ADMIN_RSS_L2_DA | ENA_ADMIN_RSS_L2_SA;
2573
2574 for (i = 0; i < ENA_ADMIN_RSS_PROTO_NUM; i++) {
2575 available_fields = hash_ctrl->selected_fields[i].fields &
2576 hash_ctrl->supported_fields[i].fields;
2577 if (available_fields != hash_ctrl->selected_fields[i].fields) {
2578 netdev_err(ena_dev->net_device,
2579 "Hash control doesn't support all the desire configuration. proto %x supported %x selected %x\n",
2580 i, hash_ctrl->supported_fields[i].fields,
2581 hash_ctrl->selected_fields[i].fields);
2582 return -EOPNOTSUPP;
2583 }
2584 }
2585
2586 rc = ena_com_set_hash_ctrl(ena_dev);
2587
2588 /* In case of failure, restore the old hash ctrl */
2589 if (unlikely(rc))
2590 ena_com_get_hash_ctrl(ena_dev, 0, NULL);
2591
2592 return rc;
2593 }
2594
ena_com_fill_hash_ctrl(struct ena_com_dev * ena_dev,enum ena_admin_flow_hash_proto proto,u16 hash_fields)2595 int ena_com_fill_hash_ctrl(struct ena_com_dev *ena_dev,
2596 enum ena_admin_flow_hash_proto proto,
2597 u16 hash_fields)
2598 {
2599 struct ena_rss *rss = &ena_dev->rss;
2600 struct ena_admin_feature_rss_hash_control *hash_ctrl = rss->hash_ctrl;
2601 u16 supported_fields;
2602 int rc;
2603
2604 if (proto >= ENA_ADMIN_RSS_PROTO_NUM) {
2605 netdev_err(ena_dev->net_device, "Invalid proto num (%u)\n",
2606 proto);
2607 return -EINVAL;
2608 }
2609
2610 /* Get the ctrl table */
2611 rc = ena_com_get_hash_ctrl(ena_dev, proto, NULL);
2612 if (unlikely(rc))
2613 return rc;
2614
2615 /* Make sure all the fields are supported */
2616 supported_fields = hash_ctrl->supported_fields[proto].fields;
2617 if ((hash_fields & supported_fields) != hash_fields) {
2618 netdev_err(ena_dev->net_device,
2619 "Proto %d doesn't support the required fields %x. supports only: %x\n",
2620 proto, hash_fields, supported_fields);
2621 }
2622
2623 hash_ctrl->selected_fields[proto].fields = hash_fields;
2624
2625 rc = ena_com_set_hash_ctrl(ena_dev);
2626
2627 /* In case of failure, restore the old hash ctrl */
2628 if (unlikely(rc))
2629 ena_com_get_hash_ctrl(ena_dev, 0, NULL);
2630
2631 return 0;
2632 }
2633
ena_com_indirect_table_fill_entry(struct ena_com_dev * ena_dev,u16 entry_idx,u16 entry_value)2634 int ena_com_indirect_table_fill_entry(struct ena_com_dev *ena_dev,
2635 u16 entry_idx, u16 entry_value)
2636 {
2637 struct ena_rss *rss = &ena_dev->rss;
2638
2639 if (unlikely(entry_idx >= (1 << rss->tbl_log_size)))
2640 return -EINVAL;
2641
2642 if (unlikely((entry_value > ENA_TOTAL_NUM_QUEUES)))
2643 return -EINVAL;
2644
2645 rss->host_rss_ind_tbl[entry_idx] = entry_value;
2646
2647 return 0;
2648 }
2649
ena_com_indirect_table_set(struct ena_com_dev * ena_dev)2650 int ena_com_indirect_table_set(struct ena_com_dev *ena_dev)
2651 {
2652 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
2653 struct ena_rss *rss = &ena_dev->rss;
2654 struct ena_admin_set_feat_cmd cmd;
2655 struct ena_admin_set_feat_resp resp;
2656 int ret;
2657
2658 if (!ena_com_check_supported_feature_id(
2659 ena_dev, ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG)) {
2660 netdev_dbg(ena_dev->net_device, "Feature %d isn't supported\n",
2661 ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG);
2662 return -EOPNOTSUPP;
2663 }
2664
2665 ret = ena_com_ind_tbl_convert_to_device(ena_dev);
2666 if (ret) {
2667 netdev_err(ena_dev->net_device,
2668 "Failed to convert host indirection table to device table\n");
2669 return ret;
2670 }
2671
2672 memset(&cmd, 0x0, sizeof(cmd));
2673
2674 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2675 cmd.aq_common_descriptor.flags =
2676 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
2677 cmd.feat_common.feature_id = ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG;
2678 cmd.u.ind_table.size = rss->tbl_log_size;
2679 cmd.u.ind_table.inline_index = 0xFFFFFFFF;
2680
2681 ret = ena_com_mem_addr_set(ena_dev,
2682 &cmd.control_buffer.address,
2683 rss->rss_ind_tbl_dma_addr);
2684 if (unlikely(ret)) {
2685 netdev_err(ena_dev->net_device, "Memory address set failed\n");
2686 return ret;
2687 }
2688
2689 cmd.control_buffer.length = (1ULL << rss->tbl_log_size) *
2690 sizeof(struct ena_admin_rss_ind_table_entry);
2691
2692 ret = ena_com_execute_admin_command(admin_queue,
2693 (struct ena_admin_aq_entry *)&cmd,
2694 sizeof(cmd),
2695 (struct ena_admin_acq_entry *)&resp,
2696 sizeof(resp));
2697
2698 if (unlikely(ret))
2699 netdev_err(ena_dev->net_device,
2700 "Failed to set indirect table. error: %d\n", ret);
2701
2702 return ret;
2703 }
2704
ena_com_indirect_table_get(struct ena_com_dev * ena_dev,u32 * ind_tbl)2705 int ena_com_indirect_table_get(struct ena_com_dev *ena_dev, u32 *ind_tbl)
2706 {
2707 struct ena_rss *rss = &ena_dev->rss;
2708 struct ena_admin_get_feat_resp get_resp;
2709 u32 tbl_size;
2710 int i, rc;
2711
2712 tbl_size = (1ULL << rss->tbl_log_size) *
2713 sizeof(struct ena_admin_rss_ind_table_entry);
2714
2715 rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2716 ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG,
2717 rss->rss_ind_tbl_dma_addr,
2718 tbl_size, 0);
2719 if (unlikely(rc))
2720 return rc;
2721
2722 if (!ind_tbl)
2723 return 0;
2724
2725 for (i = 0; i < (1 << rss->tbl_log_size); i++)
2726 ind_tbl[i] = rss->host_rss_ind_tbl[i];
2727
2728 return 0;
2729 }
2730
ena_com_rss_init(struct ena_com_dev * ena_dev,u16 indr_tbl_log_size)2731 int ena_com_rss_init(struct ena_com_dev *ena_dev, u16 indr_tbl_log_size)
2732 {
2733 int rc;
2734
2735 memset(&ena_dev->rss, 0x0, sizeof(ena_dev->rss));
2736
2737 rc = ena_com_indirect_table_allocate(ena_dev, indr_tbl_log_size);
2738 if (unlikely(rc))
2739 goto err_indr_tbl;
2740
2741 /* The following function might return unsupported in case the
2742 * device doesn't support setting the key / hash function. We can safely
2743 * ignore this error and have indirection table support only.
2744 */
2745 rc = ena_com_hash_key_allocate(ena_dev);
2746 if (likely(!rc))
2747 ena_com_hash_key_fill_default_key(ena_dev);
2748 else if (rc != -EOPNOTSUPP)
2749 goto err_hash_key;
2750
2751 rc = ena_com_hash_ctrl_init(ena_dev);
2752 if (unlikely(rc))
2753 goto err_hash_ctrl;
2754
2755 return 0;
2756
2757 err_hash_ctrl:
2758 ena_com_hash_key_destroy(ena_dev);
2759 err_hash_key:
2760 ena_com_indirect_table_destroy(ena_dev);
2761 err_indr_tbl:
2762
2763 return rc;
2764 }
2765
ena_com_rss_destroy(struct ena_com_dev * ena_dev)2766 void ena_com_rss_destroy(struct ena_com_dev *ena_dev)
2767 {
2768 ena_com_indirect_table_destroy(ena_dev);
2769 ena_com_hash_key_destroy(ena_dev);
2770 ena_com_hash_ctrl_destroy(ena_dev);
2771
2772 memset(&ena_dev->rss, 0x0, sizeof(ena_dev->rss));
2773 }
2774
ena_com_allocate_host_info(struct ena_com_dev * ena_dev)2775 int ena_com_allocate_host_info(struct ena_com_dev *ena_dev)
2776 {
2777 struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2778
2779 host_attr->host_info =
2780 dma_alloc_coherent(ena_dev->dmadev, SZ_4K,
2781 &host_attr->host_info_dma_addr, GFP_KERNEL);
2782 if (unlikely(!host_attr->host_info))
2783 return -ENOMEM;
2784
2785 host_attr->host_info->ena_spec_version = ((ENA_COMMON_SPEC_VERSION_MAJOR <<
2786 ENA_REGS_VERSION_MAJOR_VERSION_SHIFT) |
2787 (ENA_COMMON_SPEC_VERSION_MINOR));
2788
2789 return 0;
2790 }
2791
ena_com_allocate_debug_area(struct ena_com_dev * ena_dev,u32 debug_area_size)2792 int ena_com_allocate_debug_area(struct ena_com_dev *ena_dev,
2793 u32 debug_area_size)
2794 {
2795 struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2796
2797 host_attr->debug_area_virt_addr =
2798 dma_alloc_coherent(ena_dev->dmadev, debug_area_size,
2799 &host_attr->debug_area_dma_addr, GFP_KERNEL);
2800 if (unlikely(!host_attr->debug_area_virt_addr)) {
2801 host_attr->debug_area_size = 0;
2802 return -ENOMEM;
2803 }
2804
2805 host_attr->debug_area_size = debug_area_size;
2806
2807 return 0;
2808 }
2809
ena_com_delete_host_info(struct ena_com_dev * ena_dev)2810 void ena_com_delete_host_info(struct ena_com_dev *ena_dev)
2811 {
2812 struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2813
2814 if (host_attr->host_info) {
2815 dma_free_coherent(ena_dev->dmadev, SZ_4K, host_attr->host_info,
2816 host_attr->host_info_dma_addr);
2817 host_attr->host_info = NULL;
2818 }
2819 }
2820
ena_com_delete_debug_area(struct ena_com_dev * ena_dev)2821 void ena_com_delete_debug_area(struct ena_com_dev *ena_dev)
2822 {
2823 struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2824
2825 if (host_attr->debug_area_virt_addr) {
2826 dma_free_coherent(ena_dev->dmadev, host_attr->debug_area_size,
2827 host_attr->debug_area_virt_addr,
2828 host_attr->debug_area_dma_addr);
2829 host_attr->debug_area_virt_addr = NULL;
2830 }
2831 }
2832
ena_com_set_host_attributes(struct ena_com_dev * ena_dev)2833 int ena_com_set_host_attributes(struct ena_com_dev *ena_dev)
2834 {
2835 struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2836 struct ena_com_admin_queue *admin_queue;
2837 struct ena_admin_set_feat_cmd cmd;
2838 struct ena_admin_set_feat_resp resp;
2839
2840 int ret;
2841
2842 /* Host attribute config is called before ena_com_get_dev_attr_feat
2843 * so ena_com can't check if the feature is supported.
2844 */
2845
2846 memset(&cmd, 0x0, sizeof(cmd));
2847 admin_queue = &ena_dev->admin_queue;
2848
2849 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2850 cmd.feat_common.feature_id = ENA_ADMIN_HOST_ATTR_CONFIG;
2851
2852 ret = ena_com_mem_addr_set(ena_dev,
2853 &cmd.u.host_attr.debug_ba,
2854 host_attr->debug_area_dma_addr);
2855 if (unlikely(ret)) {
2856 netdev_err(ena_dev->net_device, "Memory address set failed\n");
2857 return ret;
2858 }
2859
2860 ret = ena_com_mem_addr_set(ena_dev,
2861 &cmd.u.host_attr.os_info_ba,
2862 host_attr->host_info_dma_addr);
2863 if (unlikely(ret)) {
2864 netdev_err(ena_dev->net_device, "Memory address set failed\n");
2865 return ret;
2866 }
2867
2868 cmd.u.host_attr.debug_area_size = host_attr->debug_area_size;
2869
2870 ret = ena_com_execute_admin_command(admin_queue,
2871 (struct ena_admin_aq_entry *)&cmd,
2872 sizeof(cmd),
2873 (struct ena_admin_acq_entry *)&resp,
2874 sizeof(resp));
2875
2876 if (unlikely(ret))
2877 netdev_err(ena_dev->net_device,
2878 "Failed to set host attributes: %d\n", ret);
2879
2880 return ret;
2881 }
2882
2883 /* Interrupt moderation */
ena_com_interrupt_moderation_supported(struct ena_com_dev * ena_dev)2884 bool ena_com_interrupt_moderation_supported(struct ena_com_dev *ena_dev)
2885 {
2886 return ena_com_check_supported_feature_id(ena_dev,
2887 ENA_ADMIN_INTERRUPT_MODERATION);
2888 }
2889
ena_com_update_nonadaptive_moderation_interval(struct ena_com_dev * ena_dev,u32 coalesce_usecs,u32 intr_delay_resolution,u32 * intr_moder_interval)2890 static int ena_com_update_nonadaptive_moderation_interval(struct ena_com_dev *ena_dev,
2891 u32 coalesce_usecs,
2892 u32 intr_delay_resolution,
2893 u32 *intr_moder_interval)
2894 {
2895 if (!intr_delay_resolution) {
2896 netdev_err(ena_dev->net_device,
2897 "Illegal interrupt delay granularity value\n");
2898 return -EFAULT;
2899 }
2900
2901 *intr_moder_interval = coalesce_usecs / intr_delay_resolution;
2902
2903 return 0;
2904 }
2905
ena_com_update_nonadaptive_moderation_interval_tx(struct ena_com_dev * ena_dev,u32 tx_coalesce_usecs)2906 int ena_com_update_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev,
2907 u32 tx_coalesce_usecs)
2908 {
2909 return ena_com_update_nonadaptive_moderation_interval(ena_dev,
2910 tx_coalesce_usecs,
2911 ena_dev->intr_delay_resolution,
2912 &ena_dev->intr_moder_tx_interval);
2913 }
2914
ena_com_update_nonadaptive_moderation_interval_rx(struct ena_com_dev * ena_dev,u32 rx_coalesce_usecs)2915 int ena_com_update_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev,
2916 u32 rx_coalesce_usecs)
2917 {
2918 return ena_com_update_nonadaptive_moderation_interval(ena_dev,
2919 rx_coalesce_usecs,
2920 ena_dev->intr_delay_resolution,
2921 &ena_dev->intr_moder_rx_interval);
2922 }
2923
ena_com_init_interrupt_moderation(struct ena_com_dev * ena_dev)2924 int ena_com_init_interrupt_moderation(struct ena_com_dev *ena_dev)
2925 {
2926 struct ena_admin_get_feat_resp get_resp;
2927 u16 delay_resolution;
2928 int rc;
2929
2930 rc = ena_com_get_feature(ena_dev, &get_resp,
2931 ENA_ADMIN_INTERRUPT_MODERATION, 0);
2932
2933 if (rc) {
2934 if (rc == -EOPNOTSUPP) {
2935 netdev_dbg(ena_dev->net_device,
2936 "Feature %d isn't supported\n",
2937 ENA_ADMIN_INTERRUPT_MODERATION);
2938 rc = 0;
2939 } else {
2940 netdev_err(ena_dev->net_device,
2941 "Failed to get interrupt moderation admin cmd. rc: %d\n",
2942 rc);
2943 }
2944
2945 /* no moderation supported, disable adaptive support */
2946 ena_com_disable_adaptive_moderation(ena_dev);
2947 return rc;
2948 }
2949
2950 /* if moderation is supported by device we set adaptive moderation */
2951 delay_resolution = get_resp.u.intr_moderation.intr_delay_resolution;
2952 ena_com_update_intr_delay_resolution(ena_dev, delay_resolution);
2953
2954 /* Disable adaptive moderation by default - can be enabled later */
2955 ena_com_disable_adaptive_moderation(ena_dev);
2956
2957 return 0;
2958 }
2959
ena_com_get_nonadaptive_moderation_interval_tx(struct ena_com_dev * ena_dev)2960 unsigned int ena_com_get_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev)
2961 {
2962 return ena_dev->intr_moder_tx_interval;
2963 }
2964
ena_com_get_nonadaptive_moderation_interval_rx(struct ena_com_dev * ena_dev)2965 unsigned int ena_com_get_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev)
2966 {
2967 return ena_dev->intr_moder_rx_interval;
2968 }
2969
ena_com_config_dev_mode(struct ena_com_dev * ena_dev,struct ena_admin_feature_llq_desc * llq_features,struct ena_llq_configurations * llq_default_cfg)2970 int ena_com_config_dev_mode(struct ena_com_dev *ena_dev,
2971 struct ena_admin_feature_llq_desc *llq_features,
2972 struct ena_llq_configurations *llq_default_cfg)
2973 {
2974 struct ena_com_llq_info *llq_info = &ena_dev->llq_info;
2975 int rc;
2976
2977 if (!llq_features->max_llq_num) {
2978 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
2979 return 0;
2980 }
2981
2982 rc = ena_com_config_llq_info(ena_dev, llq_features, llq_default_cfg);
2983 if (rc)
2984 return rc;
2985
2986 ena_dev->tx_max_header_size = llq_info->desc_list_entry_size -
2987 (llq_info->descs_num_before_header * sizeof(struct ena_eth_io_tx_desc));
2988
2989 if (unlikely(ena_dev->tx_max_header_size == 0)) {
2990 netdev_err(ena_dev->net_device,
2991 "The size of the LLQ entry is smaller than needed\n");
2992 return -EINVAL;
2993 }
2994
2995 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_DEV;
2996
2997 return 0;
2998 }
2999