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 pr_err("DMA address has more bits that the device supports\n");
75 return -EINVAL;
76 }
77
78 ena_addr->mem_addr_low = lower_32_bits(addr);
79 ena_addr->mem_addr_high = (u16)upper_32_bits(addr);
80
81 return 0;
82 }
83
ena_com_admin_init_sq(struct ena_com_admin_queue * admin_queue)84 static int ena_com_admin_init_sq(struct ena_com_admin_queue *admin_queue)
85 {
86 struct ena_com_admin_sq *sq = &admin_queue->sq;
87 u16 size = ADMIN_SQ_SIZE(admin_queue->q_depth);
88
89 sq->entries = dma_alloc_coherent(admin_queue->q_dmadev, size,
90 &sq->dma_addr, GFP_KERNEL);
91
92 if (!sq->entries) {
93 pr_err("Memory allocation failed\n");
94 return -ENOMEM;
95 }
96
97 sq->head = 0;
98 sq->tail = 0;
99 sq->phase = 1;
100
101 sq->db_addr = NULL;
102
103 return 0;
104 }
105
ena_com_admin_init_cq(struct ena_com_admin_queue * admin_queue)106 static int ena_com_admin_init_cq(struct ena_com_admin_queue *admin_queue)
107 {
108 struct ena_com_admin_cq *cq = &admin_queue->cq;
109 u16 size = ADMIN_CQ_SIZE(admin_queue->q_depth);
110
111 cq->entries = dma_alloc_coherent(admin_queue->q_dmadev, size,
112 &cq->dma_addr, GFP_KERNEL);
113
114 if (!cq->entries) {
115 pr_err("Memory allocation failed\n");
116 return -ENOMEM;
117 }
118
119 cq->head = 0;
120 cq->phase = 1;
121
122 return 0;
123 }
124
ena_com_admin_init_aenq(struct ena_com_dev * ena_dev,struct ena_aenq_handlers * aenq_handlers)125 static int ena_com_admin_init_aenq(struct ena_com_dev *ena_dev,
126 struct ena_aenq_handlers *aenq_handlers)
127 {
128 struct ena_com_aenq *aenq = &ena_dev->aenq;
129 u32 addr_low, addr_high, aenq_caps;
130 u16 size;
131
132 ena_dev->aenq.q_depth = ENA_ASYNC_QUEUE_DEPTH;
133 size = ADMIN_AENQ_SIZE(ENA_ASYNC_QUEUE_DEPTH);
134 aenq->entries = dma_alloc_coherent(ena_dev->dmadev, size,
135 &aenq->dma_addr, GFP_KERNEL);
136
137 if (!aenq->entries) {
138 pr_err("Memory allocation failed\n");
139 return -ENOMEM;
140 }
141
142 aenq->head = aenq->q_depth;
143 aenq->phase = 1;
144
145 addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(aenq->dma_addr);
146 addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(aenq->dma_addr);
147
148 writel(addr_low, ena_dev->reg_bar + ENA_REGS_AENQ_BASE_LO_OFF);
149 writel(addr_high, ena_dev->reg_bar + ENA_REGS_AENQ_BASE_HI_OFF);
150
151 aenq_caps = 0;
152 aenq_caps |= ena_dev->aenq.q_depth & ENA_REGS_AENQ_CAPS_AENQ_DEPTH_MASK;
153 aenq_caps |= (sizeof(struct ena_admin_aenq_entry)
154 << ENA_REGS_AENQ_CAPS_AENQ_ENTRY_SIZE_SHIFT) &
155 ENA_REGS_AENQ_CAPS_AENQ_ENTRY_SIZE_MASK;
156 writel(aenq_caps, ena_dev->reg_bar + ENA_REGS_AENQ_CAPS_OFF);
157
158 if (unlikely(!aenq_handlers)) {
159 pr_err("AENQ handlers pointer is NULL\n");
160 return -EINVAL;
161 }
162
163 aenq->aenq_handlers = aenq_handlers;
164
165 return 0;
166 }
167
comp_ctxt_release(struct ena_com_admin_queue * queue,struct ena_comp_ctx * comp_ctx)168 static void comp_ctxt_release(struct ena_com_admin_queue *queue,
169 struct ena_comp_ctx *comp_ctx)
170 {
171 comp_ctx->occupied = false;
172 atomic_dec(&queue->outstanding_cmds);
173 }
174
get_comp_ctxt(struct ena_com_admin_queue * admin_queue,u16 command_id,bool capture)175 static struct ena_comp_ctx *get_comp_ctxt(struct ena_com_admin_queue *admin_queue,
176 u16 command_id, bool capture)
177 {
178 if (unlikely(command_id >= admin_queue->q_depth)) {
179 pr_err("Command id is larger than the queue size. cmd_id: %u queue size %d\n",
180 command_id, admin_queue->q_depth);
181 return NULL;
182 }
183
184 if (unlikely(!admin_queue->comp_ctx)) {
185 pr_err("Completion context is NULL\n");
186 return NULL;
187 }
188
189 if (unlikely(admin_queue->comp_ctx[command_id].occupied && capture)) {
190 pr_err("Completion context is occupied\n");
191 return NULL;
192 }
193
194 if (capture) {
195 atomic_inc(&admin_queue->outstanding_cmds);
196 admin_queue->comp_ctx[command_id].occupied = true;
197 }
198
199 return &admin_queue->comp_ctx[command_id];
200 }
201
__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)202 static struct ena_comp_ctx *__ena_com_submit_admin_cmd(struct ena_com_admin_queue *admin_queue,
203 struct ena_admin_aq_entry *cmd,
204 size_t cmd_size_in_bytes,
205 struct ena_admin_acq_entry *comp,
206 size_t comp_size_in_bytes)
207 {
208 struct ena_comp_ctx *comp_ctx;
209 u16 tail_masked, cmd_id;
210 u16 queue_size_mask;
211 u16 cnt;
212
213 queue_size_mask = admin_queue->q_depth - 1;
214
215 tail_masked = admin_queue->sq.tail & queue_size_mask;
216
217 /* In case of queue FULL */
218 cnt = (u16)atomic_read(&admin_queue->outstanding_cmds);
219 if (cnt >= admin_queue->q_depth) {
220 pr_debug("Admin queue is full.\n");
221 admin_queue->stats.out_of_space++;
222 return ERR_PTR(-ENOSPC);
223 }
224
225 cmd_id = admin_queue->curr_cmd_id;
226
227 cmd->aq_common_descriptor.flags |= admin_queue->sq.phase &
228 ENA_ADMIN_AQ_COMMON_DESC_PHASE_MASK;
229
230 cmd->aq_common_descriptor.command_id |= cmd_id &
231 ENA_ADMIN_AQ_COMMON_DESC_COMMAND_ID_MASK;
232
233 comp_ctx = get_comp_ctxt(admin_queue, cmd_id, true);
234 if (unlikely(!comp_ctx))
235 return ERR_PTR(-EINVAL);
236
237 comp_ctx->status = ENA_CMD_SUBMITTED;
238 comp_ctx->comp_size = (u32)comp_size_in_bytes;
239 comp_ctx->user_cqe = comp;
240 comp_ctx->cmd_opcode = cmd->aq_common_descriptor.opcode;
241
242 reinit_completion(&comp_ctx->wait_event);
243
244 memcpy(&admin_queue->sq.entries[tail_masked], cmd, cmd_size_in_bytes);
245
246 admin_queue->curr_cmd_id = (admin_queue->curr_cmd_id + 1) &
247 queue_size_mask;
248
249 admin_queue->sq.tail++;
250 admin_queue->stats.submitted_cmd++;
251
252 if (unlikely((admin_queue->sq.tail & queue_size_mask) == 0))
253 admin_queue->sq.phase = !admin_queue->sq.phase;
254
255 writel(admin_queue->sq.tail, admin_queue->sq.db_addr);
256
257 return comp_ctx;
258 }
259
ena_com_init_comp_ctxt(struct ena_com_admin_queue * admin_queue)260 static int ena_com_init_comp_ctxt(struct ena_com_admin_queue *admin_queue)
261 {
262 size_t size = admin_queue->q_depth * sizeof(struct ena_comp_ctx);
263 struct ena_comp_ctx *comp_ctx;
264 u16 i;
265
266 admin_queue->comp_ctx =
267 devm_kzalloc(admin_queue->q_dmadev, size, GFP_KERNEL);
268 if (unlikely(!admin_queue->comp_ctx)) {
269 pr_err("Memory allocation failed\n");
270 return -ENOMEM;
271 }
272
273 for (i = 0; i < admin_queue->q_depth; i++) {
274 comp_ctx = get_comp_ctxt(admin_queue, i, false);
275 if (comp_ctx)
276 init_completion(&comp_ctx->wait_event);
277 }
278
279 return 0;
280 }
281
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)282 static struct ena_comp_ctx *ena_com_submit_admin_cmd(struct ena_com_admin_queue *admin_queue,
283 struct ena_admin_aq_entry *cmd,
284 size_t cmd_size_in_bytes,
285 struct ena_admin_acq_entry *comp,
286 size_t comp_size_in_bytes)
287 {
288 unsigned long flags = 0;
289 struct ena_comp_ctx *comp_ctx;
290
291 spin_lock_irqsave(&admin_queue->q_lock, flags);
292 if (unlikely(!admin_queue->running_state)) {
293 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
294 return ERR_PTR(-ENODEV);
295 }
296 comp_ctx = __ena_com_submit_admin_cmd(admin_queue, cmd,
297 cmd_size_in_bytes,
298 comp,
299 comp_size_in_bytes);
300 if (IS_ERR(comp_ctx))
301 admin_queue->running_state = false;
302 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
303
304 return comp_ctx;
305 }
306
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)307 static int ena_com_init_io_sq(struct ena_com_dev *ena_dev,
308 struct ena_com_create_io_ctx *ctx,
309 struct ena_com_io_sq *io_sq)
310 {
311 size_t size;
312 int dev_node = 0;
313
314 memset(&io_sq->desc_addr, 0x0, sizeof(io_sq->desc_addr));
315
316 io_sq->dma_addr_bits = (u8)ena_dev->dma_addr_bits;
317 io_sq->desc_entry_size =
318 (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX) ?
319 sizeof(struct ena_eth_io_tx_desc) :
320 sizeof(struct ena_eth_io_rx_desc);
321
322 size = io_sq->desc_entry_size * io_sq->q_depth;
323
324 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST) {
325 dev_node = dev_to_node(ena_dev->dmadev);
326 set_dev_node(ena_dev->dmadev, ctx->numa_node);
327 io_sq->desc_addr.virt_addr =
328 dma_alloc_coherent(ena_dev->dmadev, size,
329 &io_sq->desc_addr.phys_addr,
330 GFP_KERNEL);
331 set_dev_node(ena_dev->dmadev, dev_node);
332 if (!io_sq->desc_addr.virt_addr) {
333 io_sq->desc_addr.virt_addr =
334 dma_alloc_coherent(ena_dev->dmadev, size,
335 &io_sq->desc_addr.phys_addr,
336 GFP_KERNEL);
337 }
338
339 if (!io_sq->desc_addr.virt_addr) {
340 pr_err("Memory allocation failed\n");
341 return -ENOMEM;
342 }
343 }
344
345 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
346 /* Allocate bounce buffers */
347 io_sq->bounce_buf_ctrl.buffer_size =
348 ena_dev->llq_info.desc_list_entry_size;
349 io_sq->bounce_buf_ctrl.buffers_num =
350 ENA_COM_BOUNCE_BUFFER_CNTRL_CNT;
351 io_sq->bounce_buf_ctrl.next_to_use = 0;
352
353 size = io_sq->bounce_buf_ctrl.buffer_size *
354 io_sq->bounce_buf_ctrl.buffers_num;
355
356 dev_node = dev_to_node(ena_dev->dmadev);
357 set_dev_node(ena_dev->dmadev, ctx->numa_node);
358 io_sq->bounce_buf_ctrl.base_buffer =
359 devm_kzalloc(ena_dev->dmadev, size, GFP_KERNEL);
360 set_dev_node(ena_dev->dmadev, dev_node);
361 if (!io_sq->bounce_buf_ctrl.base_buffer)
362 io_sq->bounce_buf_ctrl.base_buffer =
363 devm_kzalloc(ena_dev->dmadev, size, GFP_KERNEL);
364
365 if (!io_sq->bounce_buf_ctrl.base_buffer) {
366 pr_err("Bounce buffer memory allocation failed\n");
367 return -ENOMEM;
368 }
369
370 memcpy(&io_sq->llq_info, &ena_dev->llq_info,
371 sizeof(io_sq->llq_info));
372
373 /* Initiate the first bounce buffer */
374 io_sq->llq_buf_ctrl.curr_bounce_buf =
375 ena_com_get_next_bounce_buffer(&io_sq->bounce_buf_ctrl);
376 memset(io_sq->llq_buf_ctrl.curr_bounce_buf,
377 0x0, io_sq->llq_info.desc_list_entry_size);
378 io_sq->llq_buf_ctrl.descs_left_in_line =
379 io_sq->llq_info.descs_num_before_header;
380 io_sq->disable_meta_caching =
381 io_sq->llq_info.disable_meta_caching;
382
383 if (io_sq->llq_info.max_entries_in_tx_burst > 0)
384 io_sq->entries_in_tx_burst_left =
385 io_sq->llq_info.max_entries_in_tx_burst;
386 }
387
388 io_sq->tail = 0;
389 io_sq->next_to_comp = 0;
390 io_sq->phase = 1;
391
392 return 0;
393 }
394
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)395 static int ena_com_init_io_cq(struct ena_com_dev *ena_dev,
396 struct ena_com_create_io_ctx *ctx,
397 struct ena_com_io_cq *io_cq)
398 {
399 size_t size;
400 int prev_node = 0;
401
402 memset(&io_cq->cdesc_addr, 0x0, sizeof(io_cq->cdesc_addr));
403
404 /* Use the basic completion descriptor for Rx */
405 io_cq->cdesc_entry_size_in_bytes =
406 (io_cq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX) ?
407 sizeof(struct ena_eth_io_tx_cdesc) :
408 sizeof(struct ena_eth_io_rx_cdesc_base);
409
410 size = io_cq->cdesc_entry_size_in_bytes * io_cq->q_depth;
411
412 prev_node = dev_to_node(ena_dev->dmadev);
413 set_dev_node(ena_dev->dmadev, ctx->numa_node);
414 io_cq->cdesc_addr.virt_addr =
415 dma_alloc_coherent(ena_dev->dmadev, size,
416 &io_cq->cdesc_addr.phys_addr, GFP_KERNEL);
417 set_dev_node(ena_dev->dmadev, prev_node);
418 if (!io_cq->cdesc_addr.virt_addr) {
419 io_cq->cdesc_addr.virt_addr =
420 dma_alloc_coherent(ena_dev->dmadev, size,
421 &io_cq->cdesc_addr.phys_addr,
422 GFP_KERNEL);
423 }
424
425 if (!io_cq->cdesc_addr.virt_addr) {
426 pr_err("Memory allocation failed\n");
427 return -ENOMEM;
428 }
429
430 io_cq->phase = 1;
431 io_cq->head = 0;
432
433 return 0;
434 }
435
ena_com_handle_single_admin_completion(struct ena_com_admin_queue * admin_queue,struct ena_admin_acq_entry * cqe)436 static void ena_com_handle_single_admin_completion(struct ena_com_admin_queue *admin_queue,
437 struct ena_admin_acq_entry *cqe)
438 {
439 struct ena_comp_ctx *comp_ctx;
440 u16 cmd_id;
441
442 cmd_id = cqe->acq_common_descriptor.command &
443 ENA_ADMIN_ACQ_COMMON_DESC_COMMAND_ID_MASK;
444
445 comp_ctx = get_comp_ctxt(admin_queue, cmd_id, false);
446 if (unlikely(!comp_ctx)) {
447 pr_err("comp_ctx is NULL. Changing the admin queue running state\n");
448 admin_queue->running_state = false;
449 return;
450 }
451
452 comp_ctx->status = ENA_CMD_COMPLETED;
453 comp_ctx->comp_status = cqe->acq_common_descriptor.status;
454
455 if (comp_ctx->user_cqe)
456 memcpy(comp_ctx->user_cqe, (void *)cqe, comp_ctx->comp_size);
457
458 if (!admin_queue->polling)
459 complete(&comp_ctx->wait_event);
460 }
461
ena_com_handle_admin_completion(struct ena_com_admin_queue * admin_queue)462 static void ena_com_handle_admin_completion(struct ena_com_admin_queue *admin_queue)
463 {
464 struct ena_admin_acq_entry *cqe = NULL;
465 u16 comp_num = 0;
466 u16 head_masked;
467 u8 phase;
468
469 head_masked = admin_queue->cq.head & (admin_queue->q_depth - 1);
470 phase = admin_queue->cq.phase;
471
472 cqe = &admin_queue->cq.entries[head_masked];
473
474 /* Go over all the completions */
475 while ((READ_ONCE(cqe->acq_common_descriptor.flags) &
476 ENA_ADMIN_ACQ_COMMON_DESC_PHASE_MASK) == phase) {
477 /* Do not read the rest of the completion entry before the
478 * phase bit was validated
479 */
480 dma_rmb();
481 ena_com_handle_single_admin_completion(admin_queue, cqe);
482
483 head_masked++;
484 comp_num++;
485 if (unlikely(head_masked == admin_queue->q_depth)) {
486 head_masked = 0;
487 phase = !phase;
488 }
489
490 cqe = &admin_queue->cq.entries[head_masked];
491 }
492
493 admin_queue->cq.head += comp_num;
494 admin_queue->cq.phase = phase;
495 admin_queue->sq.head += comp_num;
496 admin_queue->stats.completed_cmd += comp_num;
497 }
498
ena_com_comp_status_to_errno(u8 comp_status)499 static int ena_com_comp_status_to_errno(u8 comp_status)
500 {
501 if (unlikely(comp_status != 0))
502 pr_err("Admin command failed[%u]\n", comp_status);
503
504 switch (comp_status) {
505 case ENA_ADMIN_SUCCESS:
506 return 0;
507 case ENA_ADMIN_RESOURCE_ALLOCATION_FAILURE:
508 return -ENOMEM;
509 case ENA_ADMIN_UNSUPPORTED_OPCODE:
510 return -EOPNOTSUPP;
511 case ENA_ADMIN_BAD_OPCODE:
512 case ENA_ADMIN_MALFORMED_REQUEST:
513 case ENA_ADMIN_ILLEGAL_PARAMETER:
514 case ENA_ADMIN_UNKNOWN_ERROR:
515 return -EINVAL;
516 case ENA_ADMIN_RESOURCE_BUSY:
517 return -EAGAIN;
518 }
519
520 return -EINVAL;
521 }
522
ena_delay_exponential_backoff_us(u32 exp,u32 delay_us)523 static void ena_delay_exponential_backoff_us(u32 exp, u32 delay_us)
524 {
525 delay_us = max_t(u32, ENA_MIN_ADMIN_POLL_US, delay_us);
526 delay_us = min_t(u32, delay_us * (1U << exp), ENA_MAX_ADMIN_POLL_US);
527 usleep_range(delay_us, 2 * delay_us);
528 }
529
ena_com_wait_and_process_admin_cq_polling(struct ena_comp_ctx * comp_ctx,struct ena_com_admin_queue * admin_queue)530 static int ena_com_wait_and_process_admin_cq_polling(struct ena_comp_ctx *comp_ctx,
531 struct ena_com_admin_queue *admin_queue)
532 {
533 unsigned long flags = 0;
534 unsigned long timeout;
535 int ret;
536 u32 exp = 0;
537
538 timeout = jiffies + usecs_to_jiffies(admin_queue->completion_timeout);
539
540 while (1) {
541 spin_lock_irqsave(&admin_queue->q_lock, flags);
542 ena_com_handle_admin_completion(admin_queue);
543 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
544
545 if (comp_ctx->status != ENA_CMD_SUBMITTED)
546 break;
547
548 if (time_is_before_jiffies(timeout)) {
549 pr_err("Wait for completion (polling) timeout\n");
550 /* ENA didn't have any completion */
551 spin_lock_irqsave(&admin_queue->q_lock, flags);
552 admin_queue->stats.no_completion++;
553 admin_queue->running_state = false;
554 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
555
556 ret = -ETIME;
557 goto err;
558 }
559
560 ena_delay_exponential_backoff_us(exp++,
561 admin_queue->ena_dev->ena_min_poll_delay_us);
562 }
563
564 if (unlikely(comp_ctx->status == ENA_CMD_ABORTED)) {
565 pr_err("Command was aborted\n");
566 spin_lock_irqsave(&admin_queue->q_lock, flags);
567 admin_queue->stats.aborted_cmd++;
568 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
569 ret = -ENODEV;
570 goto err;
571 }
572
573 WARN(comp_ctx->status != ENA_CMD_COMPLETED, "Invalid comp status %d\n",
574 comp_ctx->status);
575
576 ret = ena_com_comp_status_to_errno(comp_ctx->comp_status);
577 err:
578 comp_ctxt_release(admin_queue, comp_ctx);
579 return ret;
580 }
581
582 /*
583 * Set the LLQ configurations of the firmware
584 *
585 * The driver provides only the enabled feature values to the device,
586 * which in turn, checks if they are supported.
587 */
ena_com_set_llq(struct ena_com_dev * ena_dev)588 static int ena_com_set_llq(struct ena_com_dev *ena_dev)
589 {
590 struct ena_com_admin_queue *admin_queue;
591 struct ena_admin_set_feat_cmd cmd;
592 struct ena_admin_set_feat_resp resp;
593 struct ena_com_llq_info *llq_info = &ena_dev->llq_info;
594 int ret;
595
596 memset(&cmd, 0x0, sizeof(cmd));
597 admin_queue = &ena_dev->admin_queue;
598
599 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
600 cmd.feat_common.feature_id = ENA_ADMIN_LLQ;
601
602 cmd.u.llq.header_location_ctrl_enabled = llq_info->header_location_ctrl;
603 cmd.u.llq.entry_size_ctrl_enabled = llq_info->desc_list_entry_size_ctrl;
604 cmd.u.llq.desc_num_before_header_enabled = llq_info->descs_num_before_header;
605 cmd.u.llq.descriptors_stride_ctrl_enabled = llq_info->desc_stride_ctrl;
606
607 cmd.u.llq.accel_mode.u.set.enabled_flags =
608 BIT(ENA_ADMIN_DISABLE_META_CACHING) |
609 BIT(ENA_ADMIN_LIMIT_TX_BURST);
610
611 ret = ena_com_execute_admin_command(admin_queue,
612 (struct ena_admin_aq_entry *)&cmd,
613 sizeof(cmd),
614 (struct ena_admin_acq_entry *)&resp,
615 sizeof(resp));
616
617 if (unlikely(ret))
618 pr_err("Failed to set LLQ configurations: %d\n", ret);
619
620 return ret;
621 }
622
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)623 static int ena_com_config_llq_info(struct ena_com_dev *ena_dev,
624 struct ena_admin_feature_llq_desc *llq_features,
625 struct ena_llq_configurations *llq_default_cfg)
626 {
627 struct ena_com_llq_info *llq_info = &ena_dev->llq_info;
628 struct ena_admin_accel_mode_get llq_accel_mode_get;
629 u16 supported_feat;
630 int rc;
631
632 memset(llq_info, 0, sizeof(*llq_info));
633
634 supported_feat = llq_features->header_location_ctrl_supported;
635
636 if (likely(supported_feat & llq_default_cfg->llq_header_location)) {
637 llq_info->header_location_ctrl =
638 llq_default_cfg->llq_header_location;
639 } else {
640 pr_err("Invalid header location control, supported: 0x%x\n",
641 supported_feat);
642 return -EINVAL;
643 }
644
645 if (likely(llq_info->header_location_ctrl == ENA_ADMIN_INLINE_HEADER)) {
646 supported_feat = llq_features->descriptors_stride_ctrl_supported;
647 if (likely(supported_feat & llq_default_cfg->llq_stride_ctrl)) {
648 llq_info->desc_stride_ctrl = llq_default_cfg->llq_stride_ctrl;
649 } else {
650 if (supported_feat & ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY) {
651 llq_info->desc_stride_ctrl = ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY;
652 } else if (supported_feat & ENA_ADMIN_SINGLE_DESC_PER_ENTRY) {
653 llq_info->desc_stride_ctrl = ENA_ADMIN_SINGLE_DESC_PER_ENTRY;
654 } else {
655 pr_err("Invalid desc_stride_ctrl, supported: 0x%x\n",
656 supported_feat);
657 return -EINVAL;
658 }
659
660 pr_err("Default llq stride ctrl is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n",
661 llq_default_cfg->llq_stride_ctrl, supported_feat,
662 llq_info->desc_stride_ctrl);
663 }
664 } else {
665 llq_info->desc_stride_ctrl = 0;
666 }
667
668 supported_feat = llq_features->entry_size_ctrl_supported;
669 if (likely(supported_feat & llq_default_cfg->llq_ring_entry_size)) {
670 llq_info->desc_list_entry_size_ctrl = llq_default_cfg->llq_ring_entry_size;
671 llq_info->desc_list_entry_size = llq_default_cfg->llq_ring_entry_size_value;
672 } else {
673 if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_128B) {
674 llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_128B;
675 llq_info->desc_list_entry_size = 128;
676 } else if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_192B) {
677 llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_192B;
678 llq_info->desc_list_entry_size = 192;
679 } else if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_256B) {
680 llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_256B;
681 llq_info->desc_list_entry_size = 256;
682 } else {
683 pr_err("Invalid entry_size_ctrl, supported: 0x%x\n",
684 supported_feat);
685 return -EINVAL;
686 }
687
688 pr_err("Default llq ring entry size is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n",
689 llq_default_cfg->llq_ring_entry_size, supported_feat,
690 llq_info->desc_list_entry_size);
691 }
692 if (unlikely(llq_info->desc_list_entry_size & 0x7)) {
693 /* The desc list entry size should be whole multiply of 8
694 * This requirement comes from __iowrite64_copy()
695 */
696 pr_err("Illegal entry size %d\n", llq_info->desc_list_entry_size);
697 return -EINVAL;
698 }
699
700 if (llq_info->desc_stride_ctrl == ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY)
701 llq_info->descs_per_entry = llq_info->desc_list_entry_size /
702 sizeof(struct ena_eth_io_tx_desc);
703 else
704 llq_info->descs_per_entry = 1;
705
706 supported_feat = llq_features->desc_num_before_header_supported;
707 if (likely(supported_feat & llq_default_cfg->llq_num_decs_before_header)) {
708 llq_info->descs_num_before_header = llq_default_cfg->llq_num_decs_before_header;
709 } else {
710 if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2) {
711 llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2;
712 } else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_1) {
713 llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_1;
714 } else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_4) {
715 llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_4;
716 } else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_8) {
717 llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_8;
718 } else {
719 pr_err("Invalid descs_num_before_header, supported: 0x%x\n",
720 supported_feat);
721 return -EINVAL;
722 }
723
724 pr_err("Default llq num descs before header is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n",
725 llq_default_cfg->llq_num_decs_before_header,
726 supported_feat, llq_info->descs_num_before_header);
727 }
728 /* Check for accelerated queue supported */
729 llq_accel_mode_get = llq_features->accel_mode.u.get;
730
731 llq_info->disable_meta_caching =
732 !!(llq_accel_mode_get.supported_flags &
733 BIT(ENA_ADMIN_DISABLE_META_CACHING));
734
735 if (llq_accel_mode_get.supported_flags & BIT(ENA_ADMIN_LIMIT_TX_BURST))
736 llq_info->max_entries_in_tx_burst =
737 llq_accel_mode_get.max_tx_burst_size /
738 llq_default_cfg->llq_ring_entry_size_value;
739
740 rc = ena_com_set_llq(ena_dev);
741 if (rc)
742 pr_err("Cannot set LLQ configuration: %d\n", rc);
743
744 return rc;
745 }
746
ena_com_wait_and_process_admin_cq_interrupts(struct ena_comp_ctx * comp_ctx,struct ena_com_admin_queue * admin_queue)747 static int ena_com_wait_and_process_admin_cq_interrupts(struct ena_comp_ctx *comp_ctx,
748 struct ena_com_admin_queue *admin_queue)
749 {
750 unsigned long flags = 0;
751 int ret;
752
753 wait_for_completion_timeout(&comp_ctx->wait_event,
754 usecs_to_jiffies(
755 admin_queue->completion_timeout));
756
757 /* In case the command wasn't completed find out the root cause.
758 * There might be 2 kinds of errors
759 * 1) No completion (timeout reached)
760 * 2) There is completion but the device didn't get any msi-x interrupt.
761 */
762 if (unlikely(comp_ctx->status == ENA_CMD_SUBMITTED)) {
763 spin_lock_irqsave(&admin_queue->q_lock, flags);
764 ena_com_handle_admin_completion(admin_queue);
765 admin_queue->stats.no_completion++;
766 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
767
768 if (comp_ctx->status == ENA_CMD_COMPLETED) {
769 pr_err("The ena device sent a completion but the driver didn't receive a MSI-X interrupt (cmd %d), autopolling mode is %s\n",
770 comp_ctx->cmd_opcode,
771 admin_queue->auto_polling ? "ON" : "OFF");
772 /* Check if fallback to polling is enabled */
773 if (admin_queue->auto_polling)
774 admin_queue->polling = true;
775 } else {
776 pr_err("The ena device didn't send a completion for the admin cmd %d status %d\n",
777 comp_ctx->cmd_opcode, comp_ctx->status);
778 }
779 /* Check if shifted to polling mode.
780 * This will happen if there is a completion without an interrupt
781 * and autopolling mode is enabled. Continuing normal execution in such case
782 */
783 if (!admin_queue->polling) {
784 admin_queue->running_state = false;
785 ret = -ETIME;
786 goto err;
787 }
788 }
789
790 ret = ena_com_comp_status_to_errno(comp_ctx->comp_status);
791 err:
792 comp_ctxt_release(admin_queue, comp_ctx);
793 return ret;
794 }
795
796 /* This method read the hardware device register through posting writes
797 * and waiting for response
798 * On timeout the function will return ENA_MMIO_READ_TIMEOUT
799 */
ena_com_reg_bar_read32(struct ena_com_dev * ena_dev,u16 offset)800 static u32 ena_com_reg_bar_read32(struct ena_com_dev *ena_dev, u16 offset)
801 {
802 struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
803 volatile struct ena_admin_ena_mmio_req_read_less_resp *read_resp =
804 mmio_read->read_resp;
805 u32 mmio_read_reg, ret, i;
806 unsigned long flags = 0;
807 u32 timeout = mmio_read->reg_read_to;
808
809 might_sleep();
810
811 if (timeout == 0)
812 timeout = ENA_REG_READ_TIMEOUT;
813
814 /* If readless is disabled, perform regular read */
815 if (!mmio_read->readless_supported)
816 return readl(ena_dev->reg_bar + offset);
817
818 spin_lock_irqsave(&mmio_read->lock, flags);
819 mmio_read->seq_num++;
820
821 read_resp->req_id = mmio_read->seq_num + 0xDEAD;
822 mmio_read_reg = (offset << ENA_REGS_MMIO_REG_READ_REG_OFF_SHIFT) &
823 ENA_REGS_MMIO_REG_READ_REG_OFF_MASK;
824 mmio_read_reg |= mmio_read->seq_num &
825 ENA_REGS_MMIO_REG_READ_REQ_ID_MASK;
826
827 writel(mmio_read_reg, ena_dev->reg_bar + ENA_REGS_MMIO_REG_READ_OFF);
828
829 for (i = 0; i < timeout; i++) {
830 if (READ_ONCE(read_resp->req_id) == mmio_read->seq_num)
831 break;
832
833 udelay(1);
834 }
835
836 if (unlikely(i == timeout)) {
837 pr_err("Reading reg failed for timeout. expected: req id[%hu] offset[%hu] actual: req id[%hu] offset[%hu]\n",
838 mmio_read->seq_num, offset, read_resp->req_id,
839 read_resp->reg_off);
840 ret = ENA_MMIO_READ_TIMEOUT;
841 goto err;
842 }
843
844 if (read_resp->reg_off != offset) {
845 pr_err("Read failure: wrong offset provided\n");
846 ret = ENA_MMIO_READ_TIMEOUT;
847 } else {
848 ret = read_resp->reg_val;
849 }
850 err:
851 spin_unlock_irqrestore(&mmio_read->lock, flags);
852
853 return ret;
854 }
855
856 /* There are two types to wait for completion.
857 * Polling mode - wait until the completion is available.
858 * Async mode - wait on wait queue until the completion is ready
859 * (or the timeout expired).
860 * It is expected that the IRQ called ena_com_handle_admin_completion
861 * to mark the completions.
862 */
ena_com_wait_and_process_admin_cq(struct ena_comp_ctx * comp_ctx,struct ena_com_admin_queue * admin_queue)863 static int ena_com_wait_and_process_admin_cq(struct ena_comp_ctx *comp_ctx,
864 struct ena_com_admin_queue *admin_queue)
865 {
866 if (admin_queue->polling)
867 return ena_com_wait_and_process_admin_cq_polling(comp_ctx,
868 admin_queue);
869
870 return ena_com_wait_and_process_admin_cq_interrupts(comp_ctx,
871 admin_queue);
872 }
873
ena_com_destroy_io_sq(struct ena_com_dev * ena_dev,struct ena_com_io_sq * io_sq)874 static int ena_com_destroy_io_sq(struct ena_com_dev *ena_dev,
875 struct ena_com_io_sq *io_sq)
876 {
877 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
878 struct ena_admin_aq_destroy_sq_cmd destroy_cmd;
879 struct ena_admin_acq_destroy_sq_resp_desc destroy_resp;
880 u8 direction;
881 int ret;
882
883 memset(&destroy_cmd, 0x0, sizeof(destroy_cmd));
884
885 if (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
886 direction = ENA_ADMIN_SQ_DIRECTION_TX;
887 else
888 direction = ENA_ADMIN_SQ_DIRECTION_RX;
889
890 destroy_cmd.sq.sq_identity |= (direction <<
891 ENA_ADMIN_SQ_SQ_DIRECTION_SHIFT) &
892 ENA_ADMIN_SQ_SQ_DIRECTION_MASK;
893
894 destroy_cmd.sq.sq_idx = io_sq->idx;
895 destroy_cmd.aq_common_descriptor.opcode = ENA_ADMIN_DESTROY_SQ;
896
897 ret = ena_com_execute_admin_command(admin_queue,
898 (struct ena_admin_aq_entry *)&destroy_cmd,
899 sizeof(destroy_cmd),
900 (struct ena_admin_acq_entry *)&destroy_resp,
901 sizeof(destroy_resp));
902
903 if (unlikely(ret && (ret != -ENODEV)))
904 pr_err("Failed to destroy io sq error: %d\n", ret);
905
906 return ret;
907 }
908
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)909 static void ena_com_io_queue_free(struct ena_com_dev *ena_dev,
910 struct ena_com_io_sq *io_sq,
911 struct ena_com_io_cq *io_cq)
912 {
913 size_t size;
914
915 if (io_cq->cdesc_addr.virt_addr) {
916 size = io_cq->cdesc_entry_size_in_bytes * io_cq->q_depth;
917
918 dma_free_coherent(ena_dev->dmadev, size,
919 io_cq->cdesc_addr.virt_addr,
920 io_cq->cdesc_addr.phys_addr);
921
922 io_cq->cdesc_addr.virt_addr = NULL;
923 }
924
925 if (io_sq->desc_addr.virt_addr) {
926 size = io_sq->desc_entry_size * io_sq->q_depth;
927
928 dma_free_coherent(ena_dev->dmadev, size,
929 io_sq->desc_addr.virt_addr,
930 io_sq->desc_addr.phys_addr);
931
932 io_sq->desc_addr.virt_addr = NULL;
933 }
934
935 if (io_sq->bounce_buf_ctrl.base_buffer) {
936 devm_kfree(ena_dev->dmadev, io_sq->bounce_buf_ctrl.base_buffer);
937 io_sq->bounce_buf_ctrl.base_buffer = NULL;
938 }
939 }
940
wait_for_reset_state(struct ena_com_dev * ena_dev,u32 timeout,u16 exp_state)941 static int wait_for_reset_state(struct ena_com_dev *ena_dev, u32 timeout,
942 u16 exp_state)
943 {
944 u32 val, exp = 0;
945 unsigned long timeout_stamp;
946
947 /* Convert timeout from resolution of 100ms to us resolution. */
948 timeout_stamp = jiffies + usecs_to_jiffies(100 * 1000 * timeout);
949
950 while (1) {
951 val = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
952
953 if (unlikely(val == ENA_MMIO_READ_TIMEOUT)) {
954 pr_err("Reg read timeout occurred\n");
955 return -ETIME;
956 }
957
958 if ((val & ENA_REGS_DEV_STS_RESET_IN_PROGRESS_MASK) ==
959 exp_state)
960 return 0;
961
962 if (time_is_before_jiffies(timeout_stamp))
963 return -ETIME;
964
965 ena_delay_exponential_backoff_us(exp++, ena_dev->ena_min_poll_delay_us);
966 }
967 }
968
ena_com_check_supported_feature_id(struct ena_com_dev * ena_dev,enum ena_admin_aq_feature_id feature_id)969 static bool ena_com_check_supported_feature_id(struct ena_com_dev *ena_dev,
970 enum ena_admin_aq_feature_id feature_id)
971 {
972 u32 feature_mask = 1 << feature_id;
973
974 /* Device attributes is always supported */
975 if ((feature_id != ENA_ADMIN_DEVICE_ATTRIBUTES) &&
976 !(ena_dev->supported_features & feature_mask))
977 return false;
978
979 return true;
980 }
981
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)982 static int ena_com_get_feature_ex(struct ena_com_dev *ena_dev,
983 struct ena_admin_get_feat_resp *get_resp,
984 enum ena_admin_aq_feature_id feature_id,
985 dma_addr_t control_buf_dma_addr,
986 u32 control_buff_size,
987 u8 feature_ver)
988 {
989 struct ena_com_admin_queue *admin_queue;
990 struct ena_admin_get_feat_cmd get_cmd;
991 int ret;
992
993 if (!ena_com_check_supported_feature_id(ena_dev, feature_id)) {
994 pr_debug("Feature %d isn't supported\n", feature_id);
995 return -EOPNOTSUPP;
996 }
997
998 memset(&get_cmd, 0x0, sizeof(get_cmd));
999 admin_queue = &ena_dev->admin_queue;
1000
1001 get_cmd.aq_common_descriptor.opcode = ENA_ADMIN_GET_FEATURE;
1002
1003 if (control_buff_size)
1004 get_cmd.aq_common_descriptor.flags =
1005 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
1006 else
1007 get_cmd.aq_common_descriptor.flags = 0;
1008
1009 ret = ena_com_mem_addr_set(ena_dev,
1010 &get_cmd.control_buffer.address,
1011 control_buf_dma_addr);
1012 if (unlikely(ret)) {
1013 pr_err("Memory address set failed\n");
1014 return ret;
1015 }
1016
1017 get_cmd.control_buffer.length = control_buff_size;
1018 get_cmd.feat_common.feature_version = feature_ver;
1019 get_cmd.feat_common.feature_id = feature_id;
1020
1021 ret = ena_com_execute_admin_command(admin_queue,
1022 (struct ena_admin_aq_entry *)
1023 &get_cmd,
1024 sizeof(get_cmd),
1025 (struct ena_admin_acq_entry *)
1026 get_resp,
1027 sizeof(*get_resp));
1028
1029 if (unlikely(ret))
1030 pr_err("Failed to submit get_feature command %d error: %d\n",
1031 feature_id, ret);
1032
1033 return ret;
1034 }
1035
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)1036 static int ena_com_get_feature(struct ena_com_dev *ena_dev,
1037 struct ena_admin_get_feat_resp *get_resp,
1038 enum ena_admin_aq_feature_id feature_id,
1039 u8 feature_ver)
1040 {
1041 return ena_com_get_feature_ex(ena_dev,
1042 get_resp,
1043 feature_id,
1044 0,
1045 0,
1046 feature_ver);
1047 }
1048
ena_com_get_current_hash_function(struct ena_com_dev * ena_dev)1049 int ena_com_get_current_hash_function(struct ena_com_dev *ena_dev)
1050 {
1051 return ena_dev->rss.hash_func;
1052 }
1053
ena_com_hash_key_fill_default_key(struct ena_com_dev * ena_dev)1054 static void ena_com_hash_key_fill_default_key(struct ena_com_dev *ena_dev)
1055 {
1056 struct ena_admin_feature_rss_flow_hash_control *hash_key =
1057 (ena_dev->rss).hash_key;
1058
1059 netdev_rss_key_fill(&hash_key->key, sizeof(hash_key->key));
1060 /* The key buffer is stored in the device in an array of
1061 * uint32 elements.
1062 */
1063 hash_key->key_parts = ENA_ADMIN_RSS_KEY_PARTS;
1064 }
1065
ena_com_hash_key_allocate(struct ena_com_dev * ena_dev)1066 static int ena_com_hash_key_allocate(struct ena_com_dev *ena_dev)
1067 {
1068 struct ena_rss *rss = &ena_dev->rss;
1069
1070 if (!ena_com_check_supported_feature_id(ena_dev,
1071 ENA_ADMIN_RSS_HASH_FUNCTION))
1072 return -EOPNOTSUPP;
1073
1074 rss->hash_key =
1075 dma_alloc_coherent(ena_dev->dmadev, sizeof(*rss->hash_key),
1076 &rss->hash_key_dma_addr, GFP_KERNEL);
1077
1078 if (unlikely(!rss->hash_key))
1079 return -ENOMEM;
1080
1081 return 0;
1082 }
1083
ena_com_hash_key_destroy(struct ena_com_dev * ena_dev)1084 static void ena_com_hash_key_destroy(struct ena_com_dev *ena_dev)
1085 {
1086 struct ena_rss *rss = &ena_dev->rss;
1087
1088 if (rss->hash_key)
1089 dma_free_coherent(ena_dev->dmadev, sizeof(*rss->hash_key),
1090 rss->hash_key, rss->hash_key_dma_addr);
1091 rss->hash_key = NULL;
1092 }
1093
ena_com_hash_ctrl_init(struct ena_com_dev * ena_dev)1094 static int ena_com_hash_ctrl_init(struct ena_com_dev *ena_dev)
1095 {
1096 struct ena_rss *rss = &ena_dev->rss;
1097
1098 rss->hash_ctrl =
1099 dma_alloc_coherent(ena_dev->dmadev, sizeof(*rss->hash_ctrl),
1100 &rss->hash_ctrl_dma_addr, GFP_KERNEL);
1101
1102 if (unlikely(!rss->hash_ctrl))
1103 return -ENOMEM;
1104
1105 return 0;
1106 }
1107
ena_com_hash_ctrl_destroy(struct ena_com_dev * ena_dev)1108 static void ena_com_hash_ctrl_destroy(struct ena_com_dev *ena_dev)
1109 {
1110 struct ena_rss *rss = &ena_dev->rss;
1111
1112 if (rss->hash_ctrl)
1113 dma_free_coherent(ena_dev->dmadev, sizeof(*rss->hash_ctrl),
1114 rss->hash_ctrl, rss->hash_ctrl_dma_addr);
1115 rss->hash_ctrl = NULL;
1116 }
1117
ena_com_indirect_table_allocate(struct ena_com_dev * ena_dev,u16 log_size)1118 static int ena_com_indirect_table_allocate(struct ena_com_dev *ena_dev,
1119 u16 log_size)
1120 {
1121 struct ena_rss *rss = &ena_dev->rss;
1122 struct ena_admin_get_feat_resp get_resp;
1123 size_t tbl_size;
1124 int ret;
1125
1126 ret = ena_com_get_feature(ena_dev, &get_resp,
1127 ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG, 0);
1128 if (unlikely(ret))
1129 return ret;
1130
1131 if ((get_resp.u.ind_table.min_size > log_size) ||
1132 (get_resp.u.ind_table.max_size < log_size)) {
1133 pr_err("Indirect table size doesn't fit. requested size: %d while min is:%d and max %d\n",
1134 1 << log_size, 1 << get_resp.u.ind_table.min_size,
1135 1 << get_resp.u.ind_table.max_size);
1136 return -EINVAL;
1137 }
1138
1139 tbl_size = (1ULL << log_size) *
1140 sizeof(struct ena_admin_rss_ind_table_entry);
1141
1142 rss->rss_ind_tbl =
1143 dma_alloc_coherent(ena_dev->dmadev, tbl_size,
1144 &rss->rss_ind_tbl_dma_addr, GFP_KERNEL);
1145 if (unlikely(!rss->rss_ind_tbl))
1146 goto mem_err1;
1147
1148 tbl_size = (1ULL << log_size) * sizeof(u16);
1149 rss->host_rss_ind_tbl =
1150 devm_kzalloc(ena_dev->dmadev, tbl_size, GFP_KERNEL);
1151 if (unlikely(!rss->host_rss_ind_tbl))
1152 goto mem_err2;
1153
1154 rss->tbl_log_size = log_size;
1155
1156 return 0;
1157
1158 mem_err2:
1159 tbl_size = (1ULL << log_size) *
1160 sizeof(struct ena_admin_rss_ind_table_entry);
1161
1162 dma_free_coherent(ena_dev->dmadev, tbl_size, rss->rss_ind_tbl,
1163 rss->rss_ind_tbl_dma_addr);
1164 rss->rss_ind_tbl = NULL;
1165 mem_err1:
1166 rss->tbl_log_size = 0;
1167 return -ENOMEM;
1168 }
1169
ena_com_indirect_table_destroy(struct ena_com_dev * ena_dev)1170 static void ena_com_indirect_table_destroy(struct ena_com_dev *ena_dev)
1171 {
1172 struct ena_rss *rss = &ena_dev->rss;
1173 size_t tbl_size = (1ULL << rss->tbl_log_size) *
1174 sizeof(struct ena_admin_rss_ind_table_entry);
1175
1176 if (rss->rss_ind_tbl)
1177 dma_free_coherent(ena_dev->dmadev, tbl_size, rss->rss_ind_tbl,
1178 rss->rss_ind_tbl_dma_addr);
1179 rss->rss_ind_tbl = NULL;
1180
1181 if (rss->host_rss_ind_tbl)
1182 devm_kfree(ena_dev->dmadev, rss->host_rss_ind_tbl);
1183 rss->host_rss_ind_tbl = NULL;
1184 }
1185
ena_com_create_io_sq(struct ena_com_dev * ena_dev,struct ena_com_io_sq * io_sq,u16 cq_idx)1186 static int ena_com_create_io_sq(struct ena_com_dev *ena_dev,
1187 struct ena_com_io_sq *io_sq, u16 cq_idx)
1188 {
1189 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1190 struct ena_admin_aq_create_sq_cmd create_cmd;
1191 struct ena_admin_acq_create_sq_resp_desc cmd_completion;
1192 u8 direction;
1193 int ret;
1194
1195 memset(&create_cmd, 0x0, sizeof(create_cmd));
1196
1197 create_cmd.aq_common_descriptor.opcode = ENA_ADMIN_CREATE_SQ;
1198
1199 if (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
1200 direction = ENA_ADMIN_SQ_DIRECTION_TX;
1201 else
1202 direction = ENA_ADMIN_SQ_DIRECTION_RX;
1203
1204 create_cmd.sq_identity |= (direction <<
1205 ENA_ADMIN_AQ_CREATE_SQ_CMD_SQ_DIRECTION_SHIFT) &
1206 ENA_ADMIN_AQ_CREATE_SQ_CMD_SQ_DIRECTION_MASK;
1207
1208 create_cmd.sq_caps_2 |= io_sq->mem_queue_type &
1209 ENA_ADMIN_AQ_CREATE_SQ_CMD_PLACEMENT_POLICY_MASK;
1210
1211 create_cmd.sq_caps_2 |= (ENA_ADMIN_COMPLETION_POLICY_DESC <<
1212 ENA_ADMIN_AQ_CREATE_SQ_CMD_COMPLETION_POLICY_SHIFT) &
1213 ENA_ADMIN_AQ_CREATE_SQ_CMD_COMPLETION_POLICY_MASK;
1214
1215 create_cmd.sq_caps_3 |=
1216 ENA_ADMIN_AQ_CREATE_SQ_CMD_IS_PHYSICALLY_CONTIGUOUS_MASK;
1217
1218 create_cmd.cq_idx = cq_idx;
1219 create_cmd.sq_depth = io_sq->q_depth;
1220
1221 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST) {
1222 ret = ena_com_mem_addr_set(ena_dev,
1223 &create_cmd.sq_ba,
1224 io_sq->desc_addr.phys_addr);
1225 if (unlikely(ret)) {
1226 pr_err("Memory address set failed\n");
1227 return ret;
1228 }
1229 }
1230
1231 ret = ena_com_execute_admin_command(admin_queue,
1232 (struct ena_admin_aq_entry *)&create_cmd,
1233 sizeof(create_cmd),
1234 (struct ena_admin_acq_entry *)&cmd_completion,
1235 sizeof(cmd_completion));
1236 if (unlikely(ret)) {
1237 pr_err("Failed to create IO SQ. error: %d\n", ret);
1238 return ret;
1239 }
1240
1241 io_sq->idx = cmd_completion.sq_idx;
1242
1243 io_sq->db_addr = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1244 (uintptr_t)cmd_completion.sq_doorbell_offset);
1245
1246 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
1247 io_sq->header_addr = (u8 __iomem *)((uintptr_t)ena_dev->mem_bar
1248 + cmd_completion.llq_headers_offset);
1249
1250 io_sq->desc_addr.pbuf_dev_addr =
1251 (u8 __iomem *)((uintptr_t)ena_dev->mem_bar +
1252 cmd_completion.llq_descriptors_offset);
1253 }
1254
1255 pr_debug("Created sq[%u], depth[%u]\n", io_sq->idx, io_sq->q_depth);
1256
1257 return ret;
1258 }
1259
ena_com_ind_tbl_convert_to_device(struct ena_com_dev * ena_dev)1260 static int ena_com_ind_tbl_convert_to_device(struct ena_com_dev *ena_dev)
1261 {
1262 struct ena_rss *rss = &ena_dev->rss;
1263 struct ena_com_io_sq *io_sq;
1264 u16 qid;
1265 int i;
1266
1267 for (i = 0; i < 1 << rss->tbl_log_size; i++) {
1268 qid = rss->host_rss_ind_tbl[i];
1269 if (qid >= ENA_TOTAL_NUM_QUEUES)
1270 return -EINVAL;
1271
1272 io_sq = &ena_dev->io_sq_queues[qid];
1273
1274 if (io_sq->direction != ENA_COM_IO_QUEUE_DIRECTION_RX)
1275 return -EINVAL;
1276
1277 rss->rss_ind_tbl[i].cq_idx = io_sq->idx;
1278 }
1279
1280 return 0;
1281 }
1282
ena_com_update_intr_delay_resolution(struct ena_com_dev * ena_dev,u16 intr_delay_resolution)1283 static void ena_com_update_intr_delay_resolution(struct ena_com_dev *ena_dev,
1284 u16 intr_delay_resolution)
1285 {
1286 u16 prev_intr_delay_resolution = ena_dev->intr_delay_resolution;
1287
1288 if (unlikely(!intr_delay_resolution)) {
1289 pr_err("Illegal intr_delay_resolution provided. Going to use default 1 usec resolution\n");
1290 intr_delay_resolution = ENA_DEFAULT_INTR_DELAY_RESOLUTION;
1291 }
1292
1293 /* update Rx */
1294 ena_dev->intr_moder_rx_interval =
1295 ena_dev->intr_moder_rx_interval *
1296 prev_intr_delay_resolution /
1297 intr_delay_resolution;
1298
1299 /* update Tx */
1300 ena_dev->intr_moder_tx_interval =
1301 ena_dev->intr_moder_tx_interval *
1302 prev_intr_delay_resolution /
1303 intr_delay_resolution;
1304
1305 ena_dev->intr_delay_resolution = intr_delay_resolution;
1306 }
1307
1308 /*****************************************************************************/
1309 /******************************* API ******************************/
1310 /*****************************************************************************/
1311
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)1312 int ena_com_execute_admin_command(struct ena_com_admin_queue *admin_queue,
1313 struct ena_admin_aq_entry *cmd,
1314 size_t cmd_size,
1315 struct ena_admin_acq_entry *comp,
1316 size_t comp_size)
1317 {
1318 struct ena_comp_ctx *comp_ctx;
1319 int ret;
1320
1321 comp_ctx = ena_com_submit_admin_cmd(admin_queue, cmd, cmd_size,
1322 comp, comp_size);
1323 if (IS_ERR(comp_ctx)) {
1324 if (comp_ctx == ERR_PTR(-ENODEV))
1325 pr_debug("Failed to submit command [%ld]\n",
1326 PTR_ERR(comp_ctx));
1327 else
1328 pr_err("Failed to submit command [%ld]\n",
1329 PTR_ERR(comp_ctx));
1330
1331 return PTR_ERR(comp_ctx);
1332 }
1333
1334 ret = ena_com_wait_and_process_admin_cq(comp_ctx, admin_queue);
1335 if (unlikely(ret)) {
1336 if (admin_queue->running_state)
1337 pr_err("Failed to process command. ret = %d\n", ret);
1338 else
1339 pr_debug("Failed to process command. ret = %d\n", ret);
1340 }
1341 return ret;
1342 }
1343
ena_com_create_io_cq(struct ena_com_dev * ena_dev,struct ena_com_io_cq * io_cq)1344 int ena_com_create_io_cq(struct ena_com_dev *ena_dev,
1345 struct ena_com_io_cq *io_cq)
1346 {
1347 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1348 struct ena_admin_aq_create_cq_cmd create_cmd;
1349 struct ena_admin_acq_create_cq_resp_desc cmd_completion;
1350 int ret;
1351
1352 memset(&create_cmd, 0x0, sizeof(create_cmd));
1353
1354 create_cmd.aq_common_descriptor.opcode = ENA_ADMIN_CREATE_CQ;
1355
1356 create_cmd.cq_caps_2 |= (io_cq->cdesc_entry_size_in_bytes / 4) &
1357 ENA_ADMIN_AQ_CREATE_CQ_CMD_CQ_ENTRY_SIZE_WORDS_MASK;
1358 create_cmd.cq_caps_1 |=
1359 ENA_ADMIN_AQ_CREATE_CQ_CMD_INTERRUPT_MODE_ENABLED_MASK;
1360
1361 create_cmd.msix_vector = io_cq->msix_vector;
1362 create_cmd.cq_depth = io_cq->q_depth;
1363
1364 ret = ena_com_mem_addr_set(ena_dev,
1365 &create_cmd.cq_ba,
1366 io_cq->cdesc_addr.phys_addr);
1367 if (unlikely(ret)) {
1368 pr_err("Memory address set failed\n");
1369 return ret;
1370 }
1371
1372 ret = ena_com_execute_admin_command(admin_queue,
1373 (struct ena_admin_aq_entry *)&create_cmd,
1374 sizeof(create_cmd),
1375 (struct ena_admin_acq_entry *)&cmd_completion,
1376 sizeof(cmd_completion));
1377 if (unlikely(ret)) {
1378 pr_err("Failed to create IO CQ. error: %d\n", ret);
1379 return ret;
1380 }
1381
1382 io_cq->idx = cmd_completion.cq_idx;
1383
1384 io_cq->unmask_reg = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1385 cmd_completion.cq_interrupt_unmask_register_offset);
1386
1387 if (cmd_completion.cq_head_db_register_offset)
1388 io_cq->cq_head_db_reg =
1389 (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1390 cmd_completion.cq_head_db_register_offset);
1391
1392 if (cmd_completion.numa_node_register_offset)
1393 io_cq->numa_node_cfg_reg =
1394 (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1395 cmd_completion.numa_node_register_offset);
1396
1397 pr_debug("Created cq[%u], depth[%u]\n", io_cq->idx, io_cq->q_depth);
1398
1399 return ret;
1400 }
1401
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)1402 int ena_com_get_io_handlers(struct ena_com_dev *ena_dev, u16 qid,
1403 struct ena_com_io_sq **io_sq,
1404 struct ena_com_io_cq **io_cq)
1405 {
1406 if (qid >= ENA_TOTAL_NUM_QUEUES) {
1407 pr_err("Invalid queue number %d but the max is %d\n", qid,
1408 ENA_TOTAL_NUM_QUEUES);
1409 return -EINVAL;
1410 }
1411
1412 *io_sq = &ena_dev->io_sq_queues[qid];
1413 *io_cq = &ena_dev->io_cq_queues[qid];
1414
1415 return 0;
1416 }
1417
ena_com_abort_admin_commands(struct ena_com_dev * ena_dev)1418 void ena_com_abort_admin_commands(struct ena_com_dev *ena_dev)
1419 {
1420 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1421 struct ena_comp_ctx *comp_ctx;
1422 u16 i;
1423
1424 if (!admin_queue->comp_ctx)
1425 return;
1426
1427 for (i = 0; i < admin_queue->q_depth; i++) {
1428 comp_ctx = get_comp_ctxt(admin_queue, i, false);
1429 if (unlikely(!comp_ctx))
1430 break;
1431
1432 comp_ctx->status = ENA_CMD_ABORTED;
1433
1434 complete(&comp_ctx->wait_event);
1435 }
1436 }
1437
ena_com_wait_for_abort_completion(struct ena_com_dev * ena_dev)1438 void ena_com_wait_for_abort_completion(struct ena_com_dev *ena_dev)
1439 {
1440 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1441 unsigned long flags = 0;
1442 u32 exp = 0;
1443
1444 spin_lock_irqsave(&admin_queue->q_lock, flags);
1445 while (atomic_read(&admin_queue->outstanding_cmds) != 0) {
1446 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
1447 ena_delay_exponential_backoff_us(exp++,
1448 ena_dev->ena_min_poll_delay_us);
1449 spin_lock_irqsave(&admin_queue->q_lock, flags);
1450 }
1451 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
1452 }
1453
ena_com_destroy_io_cq(struct ena_com_dev * ena_dev,struct ena_com_io_cq * io_cq)1454 int ena_com_destroy_io_cq(struct ena_com_dev *ena_dev,
1455 struct ena_com_io_cq *io_cq)
1456 {
1457 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1458 struct ena_admin_aq_destroy_cq_cmd destroy_cmd;
1459 struct ena_admin_acq_destroy_cq_resp_desc destroy_resp;
1460 int ret;
1461
1462 memset(&destroy_cmd, 0x0, sizeof(destroy_cmd));
1463
1464 destroy_cmd.cq_idx = io_cq->idx;
1465 destroy_cmd.aq_common_descriptor.opcode = ENA_ADMIN_DESTROY_CQ;
1466
1467 ret = ena_com_execute_admin_command(admin_queue,
1468 (struct ena_admin_aq_entry *)&destroy_cmd,
1469 sizeof(destroy_cmd),
1470 (struct ena_admin_acq_entry *)&destroy_resp,
1471 sizeof(destroy_resp));
1472
1473 if (unlikely(ret && (ret != -ENODEV)))
1474 pr_err("Failed to destroy IO CQ. error: %d\n", ret);
1475
1476 return ret;
1477 }
1478
ena_com_get_admin_running_state(struct ena_com_dev * ena_dev)1479 bool ena_com_get_admin_running_state(struct ena_com_dev *ena_dev)
1480 {
1481 return ena_dev->admin_queue.running_state;
1482 }
1483
ena_com_set_admin_running_state(struct ena_com_dev * ena_dev,bool state)1484 void ena_com_set_admin_running_state(struct ena_com_dev *ena_dev, bool state)
1485 {
1486 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1487 unsigned long flags = 0;
1488
1489 spin_lock_irqsave(&admin_queue->q_lock, flags);
1490 ena_dev->admin_queue.running_state = state;
1491 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
1492 }
1493
ena_com_admin_aenq_enable(struct ena_com_dev * ena_dev)1494 void ena_com_admin_aenq_enable(struct ena_com_dev *ena_dev)
1495 {
1496 u16 depth = ena_dev->aenq.q_depth;
1497
1498 WARN(ena_dev->aenq.head != depth, "Invalid AENQ state\n");
1499
1500 /* Init head_db to mark that all entries in the queue
1501 * are initially available
1502 */
1503 writel(depth, ena_dev->reg_bar + ENA_REGS_AENQ_HEAD_DB_OFF);
1504 }
1505
ena_com_set_aenq_config(struct ena_com_dev * ena_dev,u32 groups_flag)1506 int ena_com_set_aenq_config(struct ena_com_dev *ena_dev, u32 groups_flag)
1507 {
1508 struct ena_com_admin_queue *admin_queue;
1509 struct ena_admin_set_feat_cmd cmd;
1510 struct ena_admin_set_feat_resp resp;
1511 struct ena_admin_get_feat_resp get_resp;
1512 int ret;
1513
1514 ret = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_AENQ_CONFIG, 0);
1515 if (ret) {
1516 pr_info("Can't get aenq configuration\n");
1517 return ret;
1518 }
1519
1520 if ((get_resp.u.aenq.supported_groups & groups_flag) != groups_flag) {
1521 pr_warn("Trying to set unsupported aenq events. supported flag: 0x%x asked flag: 0x%x\n",
1522 get_resp.u.aenq.supported_groups, groups_flag);
1523 return -EOPNOTSUPP;
1524 }
1525
1526 memset(&cmd, 0x0, sizeof(cmd));
1527 admin_queue = &ena_dev->admin_queue;
1528
1529 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
1530 cmd.aq_common_descriptor.flags = 0;
1531 cmd.feat_common.feature_id = ENA_ADMIN_AENQ_CONFIG;
1532 cmd.u.aenq.enabled_groups = groups_flag;
1533
1534 ret = ena_com_execute_admin_command(admin_queue,
1535 (struct ena_admin_aq_entry *)&cmd,
1536 sizeof(cmd),
1537 (struct ena_admin_acq_entry *)&resp,
1538 sizeof(resp));
1539
1540 if (unlikely(ret))
1541 pr_err("Failed to config AENQ ret: %d\n", ret);
1542
1543 return ret;
1544 }
1545
ena_com_get_dma_width(struct ena_com_dev * ena_dev)1546 int ena_com_get_dma_width(struct ena_com_dev *ena_dev)
1547 {
1548 u32 caps = ena_com_reg_bar_read32(ena_dev, ENA_REGS_CAPS_OFF);
1549 int width;
1550
1551 if (unlikely(caps == ENA_MMIO_READ_TIMEOUT)) {
1552 pr_err("Reg read timeout occurred\n");
1553 return -ETIME;
1554 }
1555
1556 width = (caps & ENA_REGS_CAPS_DMA_ADDR_WIDTH_MASK) >>
1557 ENA_REGS_CAPS_DMA_ADDR_WIDTH_SHIFT;
1558
1559 pr_debug("ENA dma width: %d\n", width);
1560
1561 if ((width < 32) || width > ENA_MAX_PHYS_ADDR_SIZE_BITS) {
1562 pr_err("DMA width illegal value: %d\n", width);
1563 return -EINVAL;
1564 }
1565
1566 ena_dev->dma_addr_bits = width;
1567
1568 return width;
1569 }
1570
ena_com_validate_version(struct ena_com_dev * ena_dev)1571 int ena_com_validate_version(struct ena_com_dev *ena_dev)
1572 {
1573 u32 ver;
1574 u32 ctrl_ver;
1575 u32 ctrl_ver_masked;
1576
1577 /* Make sure the ENA version and the controller version are at least
1578 * as the driver expects
1579 */
1580 ver = ena_com_reg_bar_read32(ena_dev, ENA_REGS_VERSION_OFF);
1581 ctrl_ver = ena_com_reg_bar_read32(ena_dev,
1582 ENA_REGS_CONTROLLER_VERSION_OFF);
1583
1584 if (unlikely((ver == ENA_MMIO_READ_TIMEOUT) ||
1585 (ctrl_ver == ENA_MMIO_READ_TIMEOUT))) {
1586 pr_err("Reg read timeout occurred\n");
1587 return -ETIME;
1588 }
1589
1590 pr_info("ENA device version: %d.%d\n",
1591 (ver & ENA_REGS_VERSION_MAJOR_VERSION_MASK) >>
1592 ENA_REGS_VERSION_MAJOR_VERSION_SHIFT,
1593 ver & ENA_REGS_VERSION_MINOR_VERSION_MASK);
1594
1595 pr_info("ENA controller version: %d.%d.%d implementation version %d\n",
1596 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_MASK) >>
1597 ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_SHIFT,
1598 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_MASK) >>
1599 ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_SHIFT,
1600 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_SUBMINOR_VERSION_MASK),
1601 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_IMPL_ID_MASK) >>
1602 ENA_REGS_CONTROLLER_VERSION_IMPL_ID_SHIFT);
1603
1604 ctrl_ver_masked =
1605 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_MASK) |
1606 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_MASK) |
1607 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_SUBMINOR_VERSION_MASK);
1608
1609 /* Validate the ctrl version without the implementation ID */
1610 if (ctrl_ver_masked < MIN_ENA_CTRL_VER) {
1611 pr_err("ENA ctrl version is lower than the minimal ctrl version the driver supports\n");
1612 return -1;
1613 }
1614
1615 return 0;
1616 }
1617
1618 static void
ena_com_free_ena_admin_queue_comp_ctx(struct ena_com_dev * ena_dev,struct ena_com_admin_queue * admin_queue)1619 ena_com_free_ena_admin_queue_comp_ctx(struct ena_com_dev *ena_dev,
1620 struct ena_com_admin_queue *admin_queue)
1621
1622 {
1623 if (!admin_queue->comp_ctx)
1624 return;
1625
1626 devm_kfree(ena_dev->dmadev, admin_queue->comp_ctx);
1627
1628 admin_queue->comp_ctx = NULL;
1629 }
1630
ena_com_admin_destroy(struct ena_com_dev * ena_dev)1631 void ena_com_admin_destroy(struct ena_com_dev *ena_dev)
1632 {
1633 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1634 struct ena_com_admin_cq *cq = &admin_queue->cq;
1635 struct ena_com_admin_sq *sq = &admin_queue->sq;
1636 struct ena_com_aenq *aenq = &ena_dev->aenq;
1637 u16 size;
1638
1639 ena_com_free_ena_admin_queue_comp_ctx(ena_dev, admin_queue);
1640
1641 size = ADMIN_SQ_SIZE(admin_queue->q_depth);
1642 if (sq->entries)
1643 dma_free_coherent(ena_dev->dmadev, size, sq->entries,
1644 sq->dma_addr);
1645 sq->entries = NULL;
1646
1647 size = ADMIN_CQ_SIZE(admin_queue->q_depth);
1648 if (cq->entries)
1649 dma_free_coherent(ena_dev->dmadev, size, cq->entries,
1650 cq->dma_addr);
1651 cq->entries = NULL;
1652
1653 size = ADMIN_AENQ_SIZE(aenq->q_depth);
1654 if (ena_dev->aenq.entries)
1655 dma_free_coherent(ena_dev->dmadev, size, aenq->entries,
1656 aenq->dma_addr);
1657 aenq->entries = NULL;
1658 }
1659
ena_com_set_admin_polling_mode(struct ena_com_dev * ena_dev,bool polling)1660 void ena_com_set_admin_polling_mode(struct ena_com_dev *ena_dev, bool polling)
1661 {
1662 u32 mask_value = 0;
1663
1664 if (polling)
1665 mask_value = ENA_REGS_ADMIN_INTR_MASK;
1666
1667 writel(mask_value, ena_dev->reg_bar + ENA_REGS_INTR_MASK_OFF);
1668 ena_dev->admin_queue.polling = polling;
1669 }
1670
ena_com_set_admin_auto_polling_mode(struct ena_com_dev * ena_dev,bool polling)1671 void ena_com_set_admin_auto_polling_mode(struct ena_com_dev *ena_dev,
1672 bool polling)
1673 {
1674 ena_dev->admin_queue.auto_polling = polling;
1675 }
1676
ena_com_mmio_reg_read_request_init(struct ena_com_dev * ena_dev)1677 int ena_com_mmio_reg_read_request_init(struct ena_com_dev *ena_dev)
1678 {
1679 struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1680
1681 spin_lock_init(&mmio_read->lock);
1682 mmio_read->read_resp =
1683 dma_alloc_coherent(ena_dev->dmadev,
1684 sizeof(*mmio_read->read_resp),
1685 &mmio_read->read_resp_dma_addr, GFP_KERNEL);
1686 if (unlikely(!mmio_read->read_resp))
1687 goto err;
1688
1689 ena_com_mmio_reg_read_request_write_dev_addr(ena_dev);
1690
1691 mmio_read->read_resp->req_id = 0x0;
1692 mmio_read->seq_num = 0x0;
1693 mmio_read->readless_supported = true;
1694
1695 return 0;
1696
1697 err:
1698
1699 return -ENOMEM;
1700 }
1701
ena_com_set_mmio_read_mode(struct ena_com_dev * ena_dev,bool readless_supported)1702 void ena_com_set_mmio_read_mode(struct ena_com_dev *ena_dev, bool readless_supported)
1703 {
1704 struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1705
1706 mmio_read->readless_supported = readless_supported;
1707 }
1708
ena_com_mmio_reg_read_request_destroy(struct ena_com_dev * ena_dev)1709 void ena_com_mmio_reg_read_request_destroy(struct ena_com_dev *ena_dev)
1710 {
1711 struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1712
1713 writel(0x0, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_LO_OFF);
1714 writel(0x0, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_HI_OFF);
1715
1716 dma_free_coherent(ena_dev->dmadev, sizeof(*mmio_read->read_resp),
1717 mmio_read->read_resp, mmio_read->read_resp_dma_addr);
1718
1719 mmio_read->read_resp = NULL;
1720 }
1721
ena_com_mmio_reg_read_request_write_dev_addr(struct ena_com_dev * ena_dev)1722 void ena_com_mmio_reg_read_request_write_dev_addr(struct ena_com_dev *ena_dev)
1723 {
1724 struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1725 u32 addr_low, addr_high;
1726
1727 addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(mmio_read->read_resp_dma_addr);
1728 addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(mmio_read->read_resp_dma_addr);
1729
1730 writel(addr_low, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_LO_OFF);
1731 writel(addr_high, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_HI_OFF);
1732 }
1733
ena_com_admin_init(struct ena_com_dev * ena_dev,struct ena_aenq_handlers * aenq_handlers)1734 int ena_com_admin_init(struct ena_com_dev *ena_dev,
1735 struct ena_aenq_handlers *aenq_handlers)
1736 {
1737 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1738 u32 aq_caps, acq_caps, dev_sts, addr_low, addr_high;
1739 int ret;
1740
1741 dev_sts = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
1742
1743 if (unlikely(dev_sts == ENA_MMIO_READ_TIMEOUT)) {
1744 pr_err("Reg read timeout occurred\n");
1745 return -ETIME;
1746 }
1747
1748 if (!(dev_sts & ENA_REGS_DEV_STS_READY_MASK)) {
1749 pr_err("Device isn't ready, abort com init\n");
1750 return -ENODEV;
1751 }
1752
1753 admin_queue->q_depth = ENA_ADMIN_QUEUE_DEPTH;
1754
1755 admin_queue->q_dmadev = ena_dev->dmadev;
1756 admin_queue->polling = false;
1757 admin_queue->curr_cmd_id = 0;
1758
1759 atomic_set(&admin_queue->outstanding_cmds, 0);
1760
1761 spin_lock_init(&admin_queue->q_lock);
1762
1763 ret = ena_com_init_comp_ctxt(admin_queue);
1764 if (ret)
1765 goto error;
1766
1767 ret = ena_com_admin_init_sq(admin_queue);
1768 if (ret)
1769 goto error;
1770
1771 ret = ena_com_admin_init_cq(admin_queue);
1772 if (ret)
1773 goto error;
1774
1775 admin_queue->sq.db_addr = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1776 ENA_REGS_AQ_DB_OFF);
1777
1778 addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(admin_queue->sq.dma_addr);
1779 addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(admin_queue->sq.dma_addr);
1780
1781 writel(addr_low, ena_dev->reg_bar + ENA_REGS_AQ_BASE_LO_OFF);
1782 writel(addr_high, ena_dev->reg_bar + ENA_REGS_AQ_BASE_HI_OFF);
1783
1784 addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(admin_queue->cq.dma_addr);
1785 addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(admin_queue->cq.dma_addr);
1786
1787 writel(addr_low, ena_dev->reg_bar + ENA_REGS_ACQ_BASE_LO_OFF);
1788 writel(addr_high, ena_dev->reg_bar + ENA_REGS_ACQ_BASE_HI_OFF);
1789
1790 aq_caps = 0;
1791 aq_caps |= admin_queue->q_depth & ENA_REGS_AQ_CAPS_AQ_DEPTH_MASK;
1792 aq_caps |= (sizeof(struct ena_admin_aq_entry) <<
1793 ENA_REGS_AQ_CAPS_AQ_ENTRY_SIZE_SHIFT) &
1794 ENA_REGS_AQ_CAPS_AQ_ENTRY_SIZE_MASK;
1795
1796 acq_caps = 0;
1797 acq_caps |= admin_queue->q_depth & ENA_REGS_ACQ_CAPS_ACQ_DEPTH_MASK;
1798 acq_caps |= (sizeof(struct ena_admin_acq_entry) <<
1799 ENA_REGS_ACQ_CAPS_ACQ_ENTRY_SIZE_SHIFT) &
1800 ENA_REGS_ACQ_CAPS_ACQ_ENTRY_SIZE_MASK;
1801
1802 writel(aq_caps, ena_dev->reg_bar + ENA_REGS_AQ_CAPS_OFF);
1803 writel(acq_caps, ena_dev->reg_bar + ENA_REGS_ACQ_CAPS_OFF);
1804 ret = ena_com_admin_init_aenq(ena_dev, aenq_handlers);
1805 if (ret)
1806 goto error;
1807
1808 admin_queue->ena_dev = ena_dev;
1809 admin_queue->running_state = true;
1810
1811 return 0;
1812 error:
1813 ena_com_admin_destroy(ena_dev);
1814
1815 return ret;
1816 }
1817
ena_com_create_io_queue(struct ena_com_dev * ena_dev,struct ena_com_create_io_ctx * ctx)1818 int ena_com_create_io_queue(struct ena_com_dev *ena_dev,
1819 struct ena_com_create_io_ctx *ctx)
1820 {
1821 struct ena_com_io_sq *io_sq;
1822 struct ena_com_io_cq *io_cq;
1823 int ret;
1824
1825 if (ctx->qid >= ENA_TOTAL_NUM_QUEUES) {
1826 pr_err("Qid (%d) is bigger than max num of queues (%d)\n",
1827 ctx->qid, ENA_TOTAL_NUM_QUEUES);
1828 return -EINVAL;
1829 }
1830
1831 io_sq = &ena_dev->io_sq_queues[ctx->qid];
1832 io_cq = &ena_dev->io_cq_queues[ctx->qid];
1833
1834 memset(io_sq, 0x0, sizeof(*io_sq));
1835 memset(io_cq, 0x0, sizeof(*io_cq));
1836
1837 /* Init CQ */
1838 io_cq->q_depth = ctx->queue_size;
1839 io_cq->direction = ctx->direction;
1840 io_cq->qid = ctx->qid;
1841
1842 io_cq->msix_vector = ctx->msix_vector;
1843
1844 io_sq->q_depth = ctx->queue_size;
1845 io_sq->direction = ctx->direction;
1846 io_sq->qid = ctx->qid;
1847
1848 io_sq->mem_queue_type = ctx->mem_queue_type;
1849
1850 if (ctx->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
1851 /* header length is limited to 8 bits */
1852 io_sq->tx_max_header_size =
1853 min_t(u32, ena_dev->tx_max_header_size, SZ_256);
1854
1855 ret = ena_com_init_io_sq(ena_dev, ctx, io_sq);
1856 if (ret)
1857 goto error;
1858 ret = ena_com_init_io_cq(ena_dev, ctx, io_cq);
1859 if (ret)
1860 goto error;
1861
1862 ret = ena_com_create_io_cq(ena_dev, io_cq);
1863 if (ret)
1864 goto error;
1865
1866 ret = ena_com_create_io_sq(ena_dev, io_sq, io_cq->idx);
1867 if (ret)
1868 goto destroy_io_cq;
1869
1870 return 0;
1871
1872 destroy_io_cq:
1873 ena_com_destroy_io_cq(ena_dev, io_cq);
1874 error:
1875 ena_com_io_queue_free(ena_dev, io_sq, io_cq);
1876 return ret;
1877 }
1878
ena_com_destroy_io_queue(struct ena_com_dev * ena_dev,u16 qid)1879 void ena_com_destroy_io_queue(struct ena_com_dev *ena_dev, u16 qid)
1880 {
1881 struct ena_com_io_sq *io_sq;
1882 struct ena_com_io_cq *io_cq;
1883
1884 if (qid >= ENA_TOTAL_NUM_QUEUES) {
1885 pr_err("Qid (%d) is bigger than max num of queues (%d)\n", qid,
1886 ENA_TOTAL_NUM_QUEUES);
1887 return;
1888 }
1889
1890 io_sq = &ena_dev->io_sq_queues[qid];
1891 io_cq = &ena_dev->io_cq_queues[qid];
1892
1893 ena_com_destroy_io_sq(ena_dev, io_sq);
1894 ena_com_destroy_io_cq(ena_dev, io_cq);
1895
1896 ena_com_io_queue_free(ena_dev, io_sq, io_cq);
1897 }
1898
ena_com_get_link_params(struct ena_com_dev * ena_dev,struct ena_admin_get_feat_resp * resp)1899 int ena_com_get_link_params(struct ena_com_dev *ena_dev,
1900 struct ena_admin_get_feat_resp *resp)
1901 {
1902 return ena_com_get_feature(ena_dev, resp, ENA_ADMIN_LINK_CONFIG, 0);
1903 }
1904
ena_com_get_dev_attr_feat(struct ena_com_dev * ena_dev,struct ena_com_dev_get_features_ctx * get_feat_ctx)1905 int ena_com_get_dev_attr_feat(struct ena_com_dev *ena_dev,
1906 struct ena_com_dev_get_features_ctx *get_feat_ctx)
1907 {
1908 struct ena_admin_get_feat_resp get_resp;
1909 int rc;
1910
1911 rc = ena_com_get_feature(ena_dev, &get_resp,
1912 ENA_ADMIN_DEVICE_ATTRIBUTES, 0);
1913 if (rc)
1914 return rc;
1915
1916 memcpy(&get_feat_ctx->dev_attr, &get_resp.u.dev_attr,
1917 sizeof(get_resp.u.dev_attr));
1918
1919 ena_dev->supported_features = get_resp.u.dev_attr.supported_features;
1920
1921 if (ena_dev->supported_features & BIT(ENA_ADMIN_MAX_QUEUES_EXT)) {
1922 rc = ena_com_get_feature(ena_dev, &get_resp,
1923 ENA_ADMIN_MAX_QUEUES_EXT,
1924 ENA_FEATURE_MAX_QUEUE_EXT_VER);
1925 if (rc)
1926 return rc;
1927
1928 if (get_resp.u.max_queue_ext.version != ENA_FEATURE_MAX_QUEUE_EXT_VER)
1929 return -EINVAL;
1930
1931 memcpy(&get_feat_ctx->max_queue_ext, &get_resp.u.max_queue_ext,
1932 sizeof(get_resp.u.max_queue_ext));
1933 ena_dev->tx_max_header_size =
1934 get_resp.u.max_queue_ext.max_queue_ext.max_tx_header_size;
1935 } else {
1936 rc = ena_com_get_feature(ena_dev, &get_resp,
1937 ENA_ADMIN_MAX_QUEUES_NUM, 0);
1938 memcpy(&get_feat_ctx->max_queues, &get_resp.u.max_queue,
1939 sizeof(get_resp.u.max_queue));
1940 ena_dev->tx_max_header_size =
1941 get_resp.u.max_queue.max_header_size;
1942
1943 if (rc)
1944 return rc;
1945 }
1946
1947 rc = ena_com_get_feature(ena_dev, &get_resp,
1948 ENA_ADMIN_AENQ_CONFIG, 0);
1949 if (rc)
1950 return rc;
1951
1952 memcpy(&get_feat_ctx->aenq, &get_resp.u.aenq,
1953 sizeof(get_resp.u.aenq));
1954
1955 rc = ena_com_get_feature(ena_dev, &get_resp,
1956 ENA_ADMIN_STATELESS_OFFLOAD_CONFIG, 0);
1957 if (rc)
1958 return rc;
1959
1960 memcpy(&get_feat_ctx->offload, &get_resp.u.offload,
1961 sizeof(get_resp.u.offload));
1962
1963 /* Driver hints isn't mandatory admin command. So in case the
1964 * command isn't supported set driver hints to 0
1965 */
1966 rc = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_HW_HINTS, 0);
1967
1968 if (!rc)
1969 memcpy(&get_feat_ctx->hw_hints, &get_resp.u.hw_hints,
1970 sizeof(get_resp.u.hw_hints));
1971 else if (rc == -EOPNOTSUPP)
1972 memset(&get_feat_ctx->hw_hints, 0x0,
1973 sizeof(get_feat_ctx->hw_hints));
1974 else
1975 return rc;
1976
1977 rc = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_LLQ, 0);
1978 if (!rc)
1979 memcpy(&get_feat_ctx->llq, &get_resp.u.llq,
1980 sizeof(get_resp.u.llq));
1981 else if (rc == -EOPNOTSUPP)
1982 memset(&get_feat_ctx->llq, 0x0, sizeof(get_feat_ctx->llq));
1983 else
1984 return rc;
1985
1986 return 0;
1987 }
1988
ena_com_admin_q_comp_intr_handler(struct ena_com_dev * ena_dev)1989 void ena_com_admin_q_comp_intr_handler(struct ena_com_dev *ena_dev)
1990 {
1991 ena_com_handle_admin_completion(&ena_dev->admin_queue);
1992 }
1993
1994 /* ena_handle_specific_aenq_event:
1995 * return the handler that is relevant to the specific event group
1996 */
ena_com_get_specific_aenq_cb(struct ena_com_dev * ena_dev,u16 group)1997 static ena_aenq_handler ena_com_get_specific_aenq_cb(struct ena_com_dev *ena_dev,
1998 u16 group)
1999 {
2000 struct ena_aenq_handlers *aenq_handlers = ena_dev->aenq.aenq_handlers;
2001
2002 if ((group < ENA_MAX_HANDLERS) && aenq_handlers->handlers[group])
2003 return aenq_handlers->handlers[group];
2004
2005 return aenq_handlers->unimplemented_handler;
2006 }
2007
2008 /* ena_aenq_intr_handler:
2009 * handles the aenq incoming events.
2010 * pop events from the queue and apply the specific handler
2011 */
ena_com_aenq_intr_handler(struct ena_com_dev * ena_dev,void * data)2012 void ena_com_aenq_intr_handler(struct ena_com_dev *ena_dev, void *data)
2013 {
2014 struct ena_admin_aenq_entry *aenq_e;
2015 struct ena_admin_aenq_common_desc *aenq_common;
2016 struct ena_com_aenq *aenq = &ena_dev->aenq;
2017 u64 timestamp;
2018 ena_aenq_handler handler_cb;
2019 u16 masked_head, processed = 0;
2020 u8 phase;
2021
2022 masked_head = aenq->head & (aenq->q_depth - 1);
2023 phase = aenq->phase;
2024 aenq_e = &aenq->entries[masked_head]; /* Get first entry */
2025 aenq_common = &aenq_e->aenq_common_desc;
2026
2027 /* Go over all the events */
2028 while ((READ_ONCE(aenq_common->flags) &
2029 ENA_ADMIN_AENQ_COMMON_DESC_PHASE_MASK) == phase) {
2030 /* Make sure the phase bit (ownership) is as expected before
2031 * reading the rest of the descriptor.
2032 */
2033 dma_rmb();
2034
2035 timestamp = (u64)aenq_common->timestamp_low |
2036 ((u64)aenq_common->timestamp_high << 32);
2037
2038 pr_debug("AENQ! Group[%x] Syndrome[%x] timestamp: [%llus]\n",
2039 aenq_common->group, aenq_common->syndrome, timestamp);
2040
2041 /* Handle specific event*/
2042 handler_cb = ena_com_get_specific_aenq_cb(ena_dev,
2043 aenq_common->group);
2044 handler_cb(data, aenq_e); /* call the actual event handler*/
2045
2046 /* Get next event entry */
2047 masked_head++;
2048 processed++;
2049
2050 if (unlikely(masked_head == aenq->q_depth)) {
2051 masked_head = 0;
2052 phase = !phase;
2053 }
2054 aenq_e = &aenq->entries[masked_head];
2055 aenq_common = &aenq_e->aenq_common_desc;
2056 }
2057
2058 aenq->head += processed;
2059 aenq->phase = phase;
2060
2061 /* Don't update aenq doorbell if there weren't any processed events */
2062 if (!processed)
2063 return;
2064
2065 /* write the aenq doorbell after all AENQ descriptors were read */
2066 mb();
2067 writel_relaxed((u32)aenq->head,
2068 ena_dev->reg_bar + ENA_REGS_AENQ_HEAD_DB_OFF);
2069 }
2070
ena_com_dev_reset(struct ena_com_dev * ena_dev,enum ena_regs_reset_reason_types reset_reason)2071 int ena_com_dev_reset(struct ena_com_dev *ena_dev,
2072 enum ena_regs_reset_reason_types reset_reason)
2073 {
2074 u32 stat, timeout, cap, reset_val;
2075 int rc;
2076
2077 stat = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
2078 cap = ena_com_reg_bar_read32(ena_dev, ENA_REGS_CAPS_OFF);
2079
2080 if (unlikely((stat == ENA_MMIO_READ_TIMEOUT) ||
2081 (cap == ENA_MMIO_READ_TIMEOUT))) {
2082 pr_err("Reg read32 timeout occurred\n");
2083 return -ETIME;
2084 }
2085
2086 if ((stat & ENA_REGS_DEV_STS_READY_MASK) == 0) {
2087 pr_err("Device isn't ready, can't reset device\n");
2088 return -EINVAL;
2089 }
2090
2091 timeout = (cap & ENA_REGS_CAPS_RESET_TIMEOUT_MASK) >>
2092 ENA_REGS_CAPS_RESET_TIMEOUT_SHIFT;
2093 if (timeout == 0) {
2094 pr_err("Invalid timeout value\n");
2095 return -EINVAL;
2096 }
2097
2098 /* start reset */
2099 reset_val = ENA_REGS_DEV_CTL_DEV_RESET_MASK;
2100 reset_val |= (reset_reason << ENA_REGS_DEV_CTL_RESET_REASON_SHIFT) &
2101 ENA_REGS_DEV_CTL_RESET_REASON_MASK;
2102 writel(reset_val, ena_dev->reg_bar + ENA_REGS_DEV_CTL_OFF);
2103
2104 /* Write again the MMIO read request address */
2105 ena_com_mmio_reg_read_request_write_dev_addr(ena_dev);
2106
2107 rc = wait_for_reset_state(ena_dev, timeout,
2108 ENA_REGS_DEV_STS_RESET_IN_PROGRESS_MASK);
2109 if (rc != 0) {
2110 pr_err("Reset indication didn't turn on\n");
2111 return rc;
2112 }
2113
2114 /* reset done */
2115 writel(0, ena_dev->reg_bar + ENA_REGS_DEV_CTL_OFF);
2116 rc = wait_for_reset_state(ena_dev, timeout, 0);
2117 if (rc != 0) {
2118 pr_err("Reset indication didn't turn off\n");
2119 return rc;
2120 }
2121
2122 timeout = (cap & ENA_REGS_CAPS_ADMIN_CMD_TO_MASK) >>
2123 ENA_REGS_CAPS_ADMIN_CMD_TO_SHIFT;
2124 if (timeout)
2125 /* the resolution of timeout reg is 100ms */
2126 ena_dev->admin_queue.completion_timeout = timeout * 100000;
2127 else
2128 ena_dev->admin_queue.completion_timeout = ADMIN_CMD_TIMEOUT_US;
2129
2130 return 0;
2131 }
2132
ena_get_dev_stats(struct ena_com_dev * ena_dev,struct ena_com_stats_ctx * ctx,enum ena_admin_get_stats_type type)2133 static int ena_get_dev_stats(struct ena_com_dev *ena_dev,
2134 struct ena_com_stats_ctx *ctx,
2135 enum ena_admin_get_stats_type type)
2136 {
2137 struct ena_admin_aq_get_stats_cmd *get_cmd = &ctx->get_cmd;
2138 struct ena_admin_acq_get_stats_resp *get_resp = &ctx->get_resp;
2139 struct ena_com_admin_queue *admin_queue;
2140 int ret;
2141
2142 admin_queue = &ena_dev->admin_queue;
2143
2144 get_cmd->aq_common_descriptor.opcode = ENA_ADMIN_GET_STATS;
2145 get_cmd->aq_common_descriptor.flags = 0;
2146 get_cmd->type = type;
2147
2148 ret = ena_com_execute_admin_command(admin_queue,
2149 (struct ena_admin_aq_entry *)get_cmd,
2150 sizeof(*get_cmd),
2151 (struct ena_admin_acq_entry *)get_resp,
2152 sizeof(*get_resp));
2153
2154 if (unlikely(ret))
2155 pr_err("Failed to get stats. error: %d\n", ret);
2156
2157 return ret;
2158 }
2159
ena_com_get_eni_stats(struct ena_com_dev * ena_dev,struct ena_admin_eni_stats * stats)2160 int ena_com_get_eni_stats(struct ena_com_dev *ena_dev,
2161 struct ena_admin_eni_stats *stats)
2162 {
2163 struct ena_com_stats_ctx ctx;
2164 int ret;
2165
2166 memset(&ctx, 0x0, sizeof(ctx));
2167 ret = ena_get_dev_stats(ena_dev, &ctx, ENA_ADMIN_GET_STATS_TYPE_ENI);
2168 if (likely(ret == 0))
2169 memcpy(stats, &ctx.get_resp.u.eni_stats,
2170 sizeof(ctx.get_resp.u.eni_stats));
2171
2172 return ret;
2173 }
2174
ena_com_get_dev_basic_stats(struct ena_com_dev * ena_dev,struct ena_admin_basic_stats * stats)2175 int ena_com_get_dev_basic_stats(struct ena_com_dev *ena_dev,
2176 struct ena_admin_basic_stats *stats)
2177 {
2178 struct ena_com_stats_ctx ctx;
2179 int ret;
2180
2181 memset(&ctx, 0x0, sizeof(ctx));
2182 ret = ena_get_dev_stats(ena_dev, &ctx, ENA_ADMIN_GET_STATS_TYPE_BASIC);
2183 if (likely(ret == 0))
2184 memcpy(stats, &ctx.get_resp.u.basic_stats,
2185 sizeof(ctx.get_resp.u.basic_stats));
2186
2187 return ret;
2188 }
2189
ena_com_set_dev_mtu(struct ena_com_dev * ena_dev,int mtu)2190 int ena_com_set_dev_mtu(struct ena_com_dev *ena_dev, int mtu)
2191 {
2192 struct ena_com_admin_queue *admin_queue;
2193 struct ena_admin_set_feat_cmd cmd;
2194 struct ena_admin_set_feat_resp resp;
2195 int ret;
2196
2197 if (!ena_com_check_supported_feature_id(ena_dev, ENA_ADMIN_MTU)) {
2198 pr_debug("Feature %d isn't supported\n", ENA_ADMIN_MTU);
2199 return -EOPNOTSUPP;
2200 }
2201
2202 memset(&cmd, 0x0, sizeof(cmd));
2203 admin_queue = &ena_dev->admin_queue;
2204
2205 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2206 cmd.aq_common_descriptor.flags = 0;
2207 cmd.feat_common.feature_id = ENA_ADMIN_MTU;
2208 cmd.u.mtu.mtu = mtu;
2209
2210 ret = ena_com_execute_admin_command(admin_queue,
2211 (struct ena_admin_aq_entry *)&cmd,
2212 sizeof(cmd),
2213 (struct ena_admin_acq_entry *)&resp,
2214 sizeof(resp));
2215
2216 if (unlikely(ret))
2217 pr_err("Failed to set mtu %d. error: %d\n", mtu, ret);
2218
2219 return ret;
2220 }
2221
ena_com_get_offload_settings(struct ena_com_dev * ena_dev,struct ena_admin_feature_offload_desc * offload)2222 int ena_com_get_offload_settings(struct ena_com_dev *ena_dev,
2223 struct ena_admin_feature_offload_desc *offload)
2224 {
2225 int ret;
2226 struct ena_admin_get_feat_resp resp;
2227
2228 ret = ena_com_get_feature(ena_dev, &resp,
2229 ENA_ADMIN_STATELESS_OFFLOAD_CONFIG, 0);
2230 if (unlikely(ret)) {
2231 pr_err("Failed to get offload capabilities %d\n", ret);
2232 return ret;
2233 }
2234
2235 memcpy(offload, &resp.u.offload, sizeof(resp.u.offload));
2236
2237 return 0;
2238 }
2239
ena_com_set_hash_function(struct ena_com_dev * ena_dev)2240 int ena_com_set_hash_function(struct ena_com_dev *ena_dev)
2241 {
2242 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
2243 struct ena_rss *rss = &ena_dev->rss;
2244 struct ena_admin_set_feat_cmd cmd;
2245 struct ena_admin_set_feat_resp resp;
2246 struct ena_admin_get_feat_resp get_resp;
2247 int ret;
2248
2249 if (!ena_com_check_supported_feature_id(ena_dev,
2250 ENA_ADMIN_RSS_HASH_FUNCTION)) {
2251 pr_debug("Feature %d isn't supported\n",
2252 ENA_ADMIN_RSS_HASH_FUNCTION);
2253 return -EOPNOTSUPP;
2254 }
2255
2256 /* Validate hash function is supported */
2257 ret = ena_com_get_feature(ena_dev, &get_resp,
2258 ENA_ADMIN_RSS_HASH_FUNCTION, 0);
2259 if (unlikely(ret))
2260 return ret;
2261
2262 if (!(get_resp.u.flow_hash_func.supported_func & BIT(rss->hash_func))) {
2263 pr_err("Func hash %d isn't supported by device, abort\n",
2264 rss->hash_func);
2265 return -EOPNOTSUPP;
2266 }
2267
2268 memset(&cmd, 0x0, sizeof(cmd));
2269
2270 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2271 cmd.aq_common_descriptor.flags =
2272 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
2273 cmd.feat_common.feature_id = ENA_ADMIN_RSS_HASH_FUNCTION;
2274 cmd.u.flow_hash_func.init_val = rss->hash_init_val;
2275 cmd.u.flow_hash_func.selected_func = 1 << rss->hash_func;
2276
2277 ret = ena_com_mem_addr_set(ena_dev,
2278 &cmd.control_buffer.address,
2279 rss->hash_key_dma_addr);
2280 if (unlikely(ret)) {
2281 pr_err("Memory address set failed\n");
2282 return ret;
2283 }
2284
2285 cmd.control_buffer.length = sizeof(*rss->hash_key);
2286
2287 ret = ena_com_execute_admin_command(admin_queue,
2288 (struct ena_admin_aq_entry *)&cmd,
2289 sizeof(cmd),
2290 (struct ena_admin_acq_entry *)&resp,
2291 sizeof(resp));
2292 if (unlikely(ret)) {
2293 pr_err("Failed to set hash function %d. error: %d\n",
2294 rss->hash_func, ret);
2295 return -EINVAL;
2296 }
2297
2298 return 0;
2299 }
2300
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)2301 int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
2302 enum ena_admin_hash_functions func,
2303 const u8 *key, u16 key_len, u32 init_val)
2304 {
2305 struct ena_admin_feature_rss_flow_hash_control *hash_key;
2306 struct ena_admin_get_feat_resp get_resp;
2307 enum ena_admin_hash_functions old_func;
2308 struct ena_rss *rss = &ena_dev->rss;
2309 int rc;
2310
2311 hash_key = rss->hash_key;
2312
2313 /* Make sure size is a mult of DWs */
2314 if (unlikely(key_len & 0x3))
2315 return -EINVAL;
2316
2317 rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2318 ENA_ADMIN_RSS_HASH_FUNCTION,
2319 rss->hash_key_dma_addr,
2320 sizeof(*rss->hash_key), 0);
2321 if (unlikely(rc))
2322 return rc;
2323
2324 if (!(BIT(func) & get_resp.u.flow_hash_func.supported_func)) {
2325 pr_err("Flow hash function %d isn't supported\n", func);
2326 return -EOPNOTSUPP;
2327 }
2328
2329 switch (func) {
2330 case ENA_ADMIN_TOEPLITZ:
2331 if (key) {
2332 if (key_len != sizeof(hash_key->key)) {
2333 pr_err("key len (%hu) doesn't equal the supported size (%zu)\n",
2334 key_len, sizeof(hash_key->key));
2335 return -EINVAL;
2336 }
2337 memcpy(hash_key->key, key, key_len);
2338 rss->hash_init_val = init_val;
2339 hash_key->key_parts = key_len / sizeof(hash_key->key[0]);
2340 }
2341 break;
2342 case ENA_ADMIN_CRC32:
2343 rss->hash_init_val = init_val;
2344 break;
2345 default:
2346 pr_err("Invalid hash function (%d)\n", func);
2347 return -EINVAL;
2348 }
2349
2350 old_func = rss->hash_func;
2351 rss->hash_func = func;
2352 rc = ena_com_set_hash_function(ena_dev);
2353
2354 /* Restore the old function */
2355 if (unlikely(rc))
2356 rss->hash_func = old_func;
2357
2358 return rc;
2359 }
2360
ena_com_get_hash_function(struct ena_com_dev * ena_dev,enum ena_admin_hash_functions * func)2361 int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
2362 enum ena_admin_hash_functions *func)
2363 {
2364 struct ena_rss *rss = &ena_dev->rss;
2365 struct ena_admin_get_feat_resp get_resp;
2366 int rc;
2367
2368 if (unlikely(!func))
2369 return -EINVAL;
2370
2371 rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2372 ENA_ADMIN_RSS_HASH_FUNCTION,
2373 rss->hash_key_dma_addr,
2374 sizeof(*rss->hash_key), 0);
2375 if (unlikely(rc))
2376 return rc;
2377
2378 /* ffs() returns 1 in case the lsb is set */
2379 rss->hash_func = ffs(get_resp.u.flow_hash_func.selected_func);
2380 if (rss->hash_func)
2381 rss->hash_func--;
2382
2383 *func = rss->hash_func;
2384
2385 return 0;
2386 }
2387
ena_com_get_hash_key(struct ena_com_dev * ena_dev,u8 * key)2388 int ena_com_get_hash_key(struct ena_com_dev *ena_dev, u8 *key)
2389 {
2390 struct ena_admin_feature_rss_flow_hash_control *hash_key =
2391 ena_dev->rss.hash_key;
2392
2393 if (key)
2394 memcpy(key, hash_key->key,
2395 (size_t)(hash_key->key_parts) * sizeof(hash_key->key[0]));
2396
2397 return 0;
2398 }
2399
ena_com_get_hash_ctrl(struct ena_com_dev * ena_dev,enum ena_admin_flow_hash_proto proto,u16 * fields)2400 int ena_com_get_hash_ctrl(struct ena_com_dev *ena_dev,
2401 enum ena_admin_flow_hash_proto proto,
2402 u16 *fields)
2403 {
2404 struct ena_rss *rss = &ena_dev->rss;
2405 struct ena_admin_get_feat_resp get_resp;
2406 int rc;
2407
2408 rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2409 ENA_ADMIN_RSS_HASH_INPUT,
2410 rss->hash_ctrl_dma_addr,
2411 sizeof(*rss->hash_ctrl), 0);
2412 if (unlikely(rc))
2413 return rc;
2414
2415 if (fields)
2416 *fields = rss->hash_ctrl->selected_fields[proto].fields;
2417
2418 return 0;
2419 }
2420
ena_com_set_hash_ctrl(struct ena_com_dev * ena_dev)2421 int ena_com_set_hash_ctrl(struct ena_com_dev *ena_dev)
2422 {
2423 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
2424 struct ena_rss *rss = &ena_dev->rss;
2425 struct ena_admin_feature_rss_hash_control *hash_ctrl = rss->hash_ctrl;
2426 struct ena_admin_set_feat_cmd cmd;
2427 struct ena_admin_set_feat_resp resp;
2428 int ret;
2429
2430 if (!ena_com_check_supported_feature_id(ena_dev,
2431 ENA_ADMIN_RSS_HASH_INPUT)) {
2432 pr_debug("Feature %d isn't supported\n",
2433 ENA_ADMIN_RSS_HASH_INPUT);
2434 return -EOPNOTSUPP;
2435 }
2436
2437 memset(&cmd, 0x0, sizeof(cmd));
2438
2439 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2440 cmd.aq_common_descriptor.flags =
2441 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
2442 cmd.feat_common.feature_id = ENA_ADMIN_RSS_HASH_INPUT;
2443 cmd.u.flow_hash_input.enabled_input_sort =
2444 ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L3_SORT_MASK |
2445 ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L4_SORT_MASK;
2446
2447 ret = ena_com_mem_addr_set(ena_dev,
2448 &cmd.control_buffer.address,
2449 rss->hash_ctrl_dma_addr);
2450 if (unlikely(ret)) {
2451 pr_err("Memory address set failed\n");
2452 return ret;
2453 }
2454 cmd.control_buffer.length = sizeof(*hash_ctrl);
2455
2456 ret = ena_com_execute_admin_command(admin_queue,
2457 (struct ena_admin_aq_entry *)&cmd,
2458 sizeof(cmd),
2459 (struct ena_admin_acq_entry *)&resp,
2460 sizeof(resp));
2461 if (unlikely(ret))
2462 pr_err("Failed to set hash input. error: %d\n", ret);
2463
2464 return ret;
2465 }
2466
ena_com_set_default_hash_ctrl(struct ena_com_dev * ena_dev)2467 int ena_com_set_default_hash_ctrl(struct ena_com_dev *ena_dev)
2468 {
2469 struct ena_rss *rss = &ena_dev->rss;
2470 struct ena_admin_feature_rss_hash_control *hash_ctrl =
2471 rss->hash_ctrl;
2472 u16 available_fields = 0;
2473 int rc, i;
2474
2475 /* Get the supported hash input */
2476 rc = ena_com_get_hash_ctrl(ena_dev, 0, NULL);
2477 if (unlikely(rc))
2478 return rc;
2479
2480 hash_ctrl->selected_fields[ENA_ADMIN_RSS_TCP4].fields =
2481 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2482 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2483
2484 hash_ctrl->selected_fields[ENA_ADMIN_RSS_UDP4].fields =
2485 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2486 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2487
2488 hash_ctrl->selected_fields[ENA_ADMIN_RSS_TCP6].fields =
2489 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2490 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2491
2492 hash_ctrl->selected_fields[ENA_ADMIN_RSS_UDP6].fields =
2493 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2494 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2495
2496 hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP4].fields =
2497 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
2498
2499 hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP6].fields =
2500 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
2501
2502 hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP4_FRAG].fields =
2503 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
2504
2505 hash_ctrl->selected_fields[ENA_ADMIN_RSS_NOT_IP].fields =
2506 ENA_ADMIN_RSS_L2_DA | ENA_ADMIN_RSS_L2_SA;
2507
2508 for (i = 0; i < ENA_ADMIN_RSS_PROTO_NUM; i++) {
2509 available_fields = hash_ctrl->selected_fields[i].fields &
2510 hash_ctrl->supported_fields[i].fields;
2511 if (available_fields != hash_ctrl->selected_fields[i].fields) {
2512 pr_err("Hash control doesn't support all the desire configuration. proto %x supported %x selected %x\n",
2513 i, hash_ctrl->supported_fields[i].fields,
2514 hash_ctrl->selected_fields[i].fields);
2515 return -EOPNOTSUPP;
2516 }
2517 }
2518
2519 rc = ena_com_set_hash_ctrl(ena_dev);
2520
2521 /* In case of failure, restore the old hash ctrl */
2522 if (unlikely(rc))
2523 ena_com_get_hash_ctrl(ena_dev, 0, NULL);
2524
2525 return rc;
2526 }
2527
ena_com_fill_hash_ctrl(struct ena_com_dev * ena_dev,enum ena_admin_flow_hash_proto proto,u16 hash_fields)2528 int ena_com_fill_hash_ctrl(struct ena_com_dev *ena_dev,
2529 enum ena_admin_flow_hash_proto proto,
2530 u16 hash_fields)
2531 {
2532 struct ena_rss *rss = &ena_dev->rss;
2533 struct ena_admin_feature_rss_hash_control *hash_ctrl = rss->hash_ctrl;
2534 u16 supported_fields;
2535 int rc;
2536
2537 if (proto >= ENA_ADMIN_RSS_PROTO_NUM) {
2538 pr_err("Invalid proto num (%u)\n", proto);
2539 return -EINVAL;
2540 }
2541
2542 /* Get the ctrl table */
2543 rc = ena_com_get_hash_ctrl(ena_dev, proto, NULL);
2544 if (unlikely(rc))
2545 return rc;
2546
2547 /* Make sure all the fields are supported */
2548 supported_fields = hash_ctrl->supported_fields[proto].fields;
2549 if ((hash_fields & supported_fields) != hash_fields) {
2550 pr_err("Proto %d doesn't support the required fields %x. supports only: %x\n",
2551 proto, hash_fields, supported_fields);
2552 }
2553
2554 hash_ctrl->selected_fields[proto].fields = hash_fields;
2555
2556 rc = ena_com_set_hash_ctrl(ena_dev);
2557
2558 /* In case of failure, restore the old hash ctrl */
2559 if (unlikely(rc))
2560 ena_com_get_hash_ctrl(ena_dev, 0, NULL);
2561
2562 return 0;
2563 }
2564
ena_com_indirect_table_fill_entry(struct ena_com_dev * ena_dev,u16 entry_idx,u16 entry_value)2565 int ena_com_indirect_table_fill_entry(struct ena_com_dev *ena_dev,
2566 u16 entry_idx, u16 entry_value)
2567 {
2568 struct ena_rss *rss = &ena_dev->rss;
2569
2570 if (unlikely(entry_idx >= (1 << rss->tbl_log_size)))
2571 return -EINVAL;
2572
2573 if (unlikely((entry_value > ENA_TOTAL_NUM_QUEUES)))
2574 return -EINVAL;
2575
2576 rss->host_rss_ind_tbl[entry_idx] = entry_value;
2577
2578 return 0;
2579 }
2580
ena_com_indirect_table_set(struct ena_com_dev * ena_dev)2581 int ena_com_indirect_table_set(struct ena_com_dev *ena_dev)
2582 {
2583 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
2584 struct ena_rss *rss = &ena_dev->rss;
2585 struct ena_admin_set_feat_cmd cmd;
2586 struct ena_admin_set_feat_resp resp;
2587 int ret;
2588
2589 if (!ena_com_check_supported_feature_id(
2590 ena_dev, ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG)) {
2591 pr_debug("Feature %d isn't supported\n",
2592 ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG);
2593 return -EOPNOTSUPP;
2594 }
2595
2596 ret = ena_com_ind_tbl_convert_to_device(ena_dev);
2597 if (ret) {
2598 pr_err("Failed to convert host indirection table to device table\n");
2599 return ret;
2600 }
2601
2602 memset(&cmd, 0x0, sizeof(cmd));
2603
2604 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2605 cmd.aq_common_descriptor.flags =
2606 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
2607 cmd.feat_common.feature_id = ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG;
2608 cmd.u.ind_table.size = rss->tbl_log_size;
2609 cmd.u.ind_table.inline_index = 0xFFFFFFFF;
2610
2611 ret = ena_com_mem_addr_set(ena_dev,
2612 &cmd.control_buffer.address,
2613 rss->rss_ind_tbl_dma_addr);
2614 if (unlikely(ret)) {
2615 pr_err("Memory address set failed\n");
2616 return ret;
2617 }
2618
2619 cmd.control_buffer.length = (1ULL << rss->tbl_log_size) *
2620 sizeof(struct ena_admin_rss_ind_table_entry);
2621
2622 ret = ena_com_execute_admin_command(admin_queue,
2623 (struct ena_admin_aq_entry *)&cmd,
2624 sizeof(cmd),
2625 (struct ena_admin_acq_entry *)&resp,
2626 sizeof(resp));
2627
2628 if (unlikely(ret))
2629 pr_err("Failed to set indirect table. error: %d\n", ret);
2630
2631 return ret;
2632 }
2633
ena_com_indirect_table_get(struct ena_com_dev * ena_dev,u32 * ind_tbl)2634 int ena_com_indirect_table_get(struct ena_com_dev *ena_dev, u32 *ind_tbl)
2635 {
2636 struct ena_rss *rss = &ena_dev->rss;
2637 struct ena_admin_get_feat_resp get_resp;
2638 u32 tbl_size;
2639 int i, rc;
2640
2641 tbl_size = (1ULL << rss->tbl_log_size) *
2642 sizeof(struct ena_admin_rss_ind_table_entry);
2643
2644 rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2645 ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG,
2646 rss->rss_ind_tbl_dma_addr,
2647 tbl_size, 0);
2648 if (unlikely(rc))
2649 return rc;
2650
2651 if (!ind_tbl)
2652 return 0;
2653
2654 for (i = 0; i < (1 << rss->tbl_log_size); i++)
2655 ind_tbl[i] = rss->host_rss_ind_tbl[i];
2656
2657 return 0;
2658 }
2659
ena_com_rss_init(struct ena_com_dev * ena_dev,u16 indr_tbl_log_size)2660 int ena_com_rss_init(struct ena_com_dev *ena_dev, u16 indr_tbl_log_size)
2661 {
2662 int rc;
2663
2664 memset(&ena_dev->rss, 0x0, sizeof(ena_dev->rss));
2665
2666 rc = ena_com_indirect_table_allocate(ena_dev, indr_tbl_log_size);
2667 if (unlikely(rc))
2668 goto err_indr_tbl;
2669
2670 /* The following function might return unsupported in case the
2671 * device doesn't support setting the key / hash function. We can safely
2672 * ignore this error and have indirection table support only.
2673 */
2674 rc = ena_com_hash_key_allocate(ena_dev);
2675 if (likely(!rc))
2676 ena_com_hash_key_fill_default_key(ena_dev);
2677 else if (rc != -EOPNOTSUPP)
2678 goto err_hash_key;
2679
2680 rc = ena_com_hash_ctrl_init(ena_dev);
2681 if (unlikely(rc))
2682 goto err_hash_ctrl;
2683
2684 return 0;
2685
2686 err_hash_ctrl:
2687 ena_com_hash_key_destroy(ena_dev);
2688 err_hash_key:
2689 ena_com_indirect_table_destroy(ena_dev);
2690 err_indr_tbl:
2691
2692 return rc;
2693 }
2694
ena_com_rss_destroy(struct ena_com_dev * ena_dev)2695 void ena_com_rss_destroy(struct ena_com_dev *ena_dev)
2696 {
2697 ena_com_indirect_table_destroy(ena_dev);
2698 ena_com_hash_key_destroy(ena_dev);
2699 ena_com_hash_ctrl_destroy(ena_dev);
2700
2701 memset(&ena_dev->rss, 0x0, sizeof(ena_dev->rss));
2702 }
2703
ena_com_allocate_host_info(struct ena_com_dev * ena_dev)2704 int ena_com_allocate_host_info(struct ena_com_dev *ena_dev)
2705 {
2706 struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2707
2708 host_attr->host_info =
2709 dma_alloc_coherent(ena_dev->dmadev, SZ_4K,
2710 &host_attr->host_info_dma_addr, GFP_KERNEL);
2711 if (unlikely(!host_attr->host_info))
2712 return -ENOMEM;
2713
2714 host_attr->host_info->ena_spec_version = ((ENA_COMMON_SPEC_VERSION_MAJOR <<
2715 ENA_REGS_VERSION_MAJOR_VERSION_SHIFT) |
2716 (ENA_COMMON_SPEC_VERSION_MINOR));
2717
2718 return 0;
2719 }
2720
ena_com_allocate_debug_area(struct ena_com_dev * ena_dev,u32 debug_area_size)2721 int ena_com_allocate_debug_area(struct ena_com_dev *ena_dev,
2722 u32 debug_area_size)
2723 {
2724 struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2725
2726 host_attr->debug_area_virt_addr =
2727 dma_alloc_coherent(ena_dev->dmadev, debug_area_size,
2728 &host_attr->debug_area_dma_addr, GFP_KERNEL);
2729 if (unlikely(!host_attr->debug_area_virt_addr)) {
2730 host_attr->debug_area_size = 0;
2731 return -ENOMEM;
2732 }
2733
2734 host_attr->debug_area_size = debug_area_size;
2735
2736 return 0;
2737 }
2738
ena_com_delete_host_info(struct ena_com_dev * ena_dev)2739 void ena_com_delete_host_info(struct ena_com_dev *ena_dev)
2740 {
2741 struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2742
2743 if (host_attr->host_info) {
2744 dma_free_coherent(ena_dev->dmadev, SZ_4K, host_attr->host_info,
2745 host_attr->host_info_dma_addr);
2746 host_attr->host_info = NULL;
2747 }
2748 }
2749
ena_com_delete_debug_area(struct ena_com_dev * ena_dev)2750 void ena_com_delete_debug_area(struct ena_com_dev *ena_dev)
2751 {
2752 struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2753
2754 if (host_attr->debug_area_virt_addr) {
2755 dma_free_coherent(ena_dev->dmadev, host_attr->debug_area_size,
2756 host_attr->debug_area_virt_addr,
2757 host_attr->debug_area_dma_addr);
2758 host_attr->debug_area_virt_addr = NULL;
2759 }
2760 }
2761
ena_com_set_host_attributes(struct ena_com_dev * ena_dev)2762 int ena_com_set_host_attributes(struct ena_com_dev *ena_dev)
2763 {
2764 struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2765 struct ena_com_admin_queue *admin_queue;
2766 struct ena_admin_set_feat_cmd cmd;
2767 struct ena_admin_set_feat_resp resp;
2768
2769 int ret;
2770
2771 /* Host attribute config is called before ena_com_get_dev_attr_feat
2772 * so ena_com can't check if the feature is supported.
2773 */
2774
2775 memset(&cmd, 0x0, sizeof(cmd));
2776 admin_queue = &ena_dev->admin_queue;
2777
2778 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2779 cmd.feat_common.feature_id = ENA_ADMIN_HOST_ATTR_CONFIG;
2780
2781 ret = ena_com_mem_addr_set(ena_dev,
2782 &cmd.u.host_attr.debug_ba,
2783 host_attr->debug_area_dma_addr);
2784 if (unlikely(ret)) {
2785 pr_err("Memory address set failed\n");
2786 return ret;
2787 }
2788
2789 ret = ena_com_mem_addr_set(ena_dev,
2790 &cmd.u.host_attr.os_info_ba,
2791 host_attr->host_info_dma_addr);
2792 if (unlikely(ret)) {
2793 pr_err("Memory address set failed\n");
2794 return ret;
2795 }
2796
2797 cmd.u.host_attr.debug_area_size = host_attr->debug_area_size;
2798
2799 ret = ena_com_execute_admin_command(admin_queue,
2800 (struct ena_admin_aq_entry *)&cmd,
2801 sizeof(cmd),
2802 (struct ena_admin_acq_entry *)&resp,
2803 sizeof(resp));
2804
2805 if (unlikely(ret))
2806 pr_err("Failed to set host attributes: %d\n", ret);
2807
2808 return ret;
2809 }
2810
2811 /* Interrupt moderation */
ena_com_interrupt_moderation_supported(struct ena_com_dev * ena_dev)2812 bool ena_com_interrupt_moderation_supported(struct ena_com_dev *ena_dev)
2813 {
2814 return ena_com_check_supported_feature_id(ena_dev,
2815 ENA_ADMIN_INTERRUPT_MODERATION);
2816 }
2817
ena_com_update_nonadaptive_moderation_interval(u32 coalesce_usecs,u32 intr_delay_resolution,u32 * intr_moder_interval)2818 static int ena_com_update_nonadaptive_moderation_interval(u32 coalesce_usecs,
2819 u32 intr_delay_resolution,
2820 u32 *intr_moder_interval)
2821 {
2822 if (!intr_delay_resolution) {
2823 pr_err("Illegal interrupt delay granularity value\n");
2824 return -EFAULT;
2825 }
2826
2827 *intr_moder_interval = coalesce_usecs / intr_delay_resolution;
2828
2829 return 0;
2830 }
2831
ena_com_update_nonadaptive_moderation_interval_tx(struct ena_com_dev * ena_dev,u32 tx_coalesce_usecs)2832 int ena_com_update_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev,
2833 u32 tx_coalesce_usecs)
2834 {
2835 return ena_com_update_nonadaptive_moderation_interval(tx_coalesce_usecs,
2836 ena_dev->intr_delay_resolution,
2837 &ena_dev->intr_moder_tx_interval);
2838 }
2839
ena_com_update_nonadaptive_moderation_interval_rx(struct ena_com_dev * ena_dev,u32 rx_coalesce_usecs)2840 int ena_com_update_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev,
2841 u32 rx_coalesce_usecs)
2842 {
2843 return ena_com_update_nonadaptive_moderation_interval(rx_coalesce_usecs,
2844 ena_dev->intr_delay_resolution,
2845 &ena_dev->intr_moder_rx_interval);
2846 }
2847
ena_com_init_interrupt_moderation(struct ena_com_dev * ena_dev)2848 int ena_com_init_interrupt_moderation(struct ena_com_dev *ena_dev)
2849 {
2850 struct ena_admin_get_feat_resp get_resp;
2851 u16 delay_resolution;
2852 int rc;
2853
2854 rc = ena_com_get_feature(ena_dev, &get_resp,
2855 ENA_ADMIN_INTERRUPT_MODERATION, 0);
2856
2857 if (rc) {
2858 if (rc == -EOPNOTSUPP) {
2859 pr_debug("Feature %d isn't supported\n",
2860 ENA_ADMIN_INTERRUPT_MODERATION);
2861 rc = 0;
2862 } else {
2863 pr_err("Failed to get interrupt moderation admin cmd. rc: %d\n",
2864 rc);
2865 }
2866
2867 /* no moderation supported, disable adaptive support */
2868 ena_com_disable_adaptive_moderation(ena_dev);
2869 return rc;
2870 }
2871
2872 /* if moderation is supported by device we set adaptive moderation */
2873 delay_resolution = get_resp.u.intr_moderation.intr_delay_resolution;
2874 ena_com_update_intr_delay_resolution(ena_dev, delay_resolution);
2875
2876 /* Disable adaptive moderation by default - can be enabled later */
2877 ena_com_disable_adaptive_moderation(ena_dev);
2878
2879 return 0;
2880 }
2881
ena_com_get_nonadaptive_moderation_interval_tx(struct ena_com_dev * ena_dev)2882 unsigned int ena_com_get_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev)
2883 {
2884 return ena_dev->intr_moder_tx_interval;
2885 }
2886
ena_com_get_nonadaptive_moderation_interval_rx(struct ena_com_dev * ena_dev)2887 unsigned int ena_com_get_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev)
2888 {
2889 return ena_dev->intr_moder_rx_interval;
2890 }
2891
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)2892 int ena_com_config_dev_mode(struct ena_com_dev *ena_dev,
2893 struct ena_admin_feature_llq_desc *llq_features,
2894 struct ena_llq_configurations *llq_default_cfg)
2895 {
2896 struct ena_com_llq_info *llq_info = &ena_dev->llq_info;
2897 int rc;
2898
2899 if (!llq_features->max_llq_num) {
2900 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
2901 return 0;
2902 }
2903
2904 rc = ena_com_config_llq_info(ena_dev, llq_features, llq_default_cfg);
2905 if (rc)
2906 return rc;
2907
2908 ena_dev->tx_max_header_size = llq_info->desc_list_entry_size -
2909 (llq_info->descs_num_before_header * sizeof(struct ena_eth_io_tx_desc));
2910
2911 if (unlikely(ena_dev->tx_max_header_size == 0)) {
2912 pr_err("The size of the LLQ entry is smaller than needed\n");
2913 return -EINVAL;
2914 }
2915
2916 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_DEV;
2917
2918 return 0;
2919 }
2920