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 
69 static int ena_com_mem_addr_set(struct ena_com_dev *ena_dev,
70 				       struct ena_common_mem_addr *ena_addr,
71 				       dma_addr_t addr)
72 {
73 	if ((addr & GENMASK_ULL(ena_dev->dma_addr_bits - 1, 0)) != addr) {
74 		netdev_err(ena_dev->net_device,
75 			   "DMA address has more bits that the device supports\n");
76 		return -EINVAL;
77 	}
78 
79 	ena_addr->mem_addr_low = lower_32_bits(addr);
80 	ena_addr->mem_addr_high = (u16)upper_32_bits(addr);
81 
82 	return 0;
83 }
84 
85 static int ena_com_admin_init_sq(struct ena_com_admin_queue *admin_queue)
86 {
87 	struct ena_com_dev *ena_dev = admin_queue->ena_dev;
88 	struct ena_com_admin_sq *sq = &admin_queue->sq;
89 	u16 size = ADMIN_SQ_SIZE(admin_queue->q_depth);
90 
91 	sq->entries = dma_alloc_coherent(admin_queue->q_dmadev, size,
92 					 &sq->dma_addr, GFP_KERNEL);
93 
94 	if (!sq->entries) {
95 		netdev_err(ena_dev->net_device, "Memory allocation failed\n");
96 		return -ENOMEM;
97 	}
98 
99 	sq->head = 0;
100 	sq->tail = 0;
101 	sq->phase = 1;
102 
103 	sq->db_addr = NULL;
104 
105 	return 0;
106 }
107 
108 static int ena_com_admin_init_cq(struct ena_com_admin_queue *admin_queue)
109 {
110 	struct ena_com_dev *ena_dev = admin_queue->ena_dev;
111 	struct ena_com_admin_cq *cq = &admin_queue->cq;
112 	u16 size = ADMIN_CQ_SIZE(admin_queue->q_depth);
113 
114 	cq->entries = dma_alloc_coherent(admin_queue->q_dmadev, size,
115 					 &cq->dma_addr, GFP_KERNEL);
116 
117 	if (!cq->entries) {
118 		netdev_err(ena_dev->net_device, "Memory allocation failed\n");
119 		return -ENOMEM;
120 	}
121 
122 	cq->head = 0;
123 	cq->phase = 1;
124 
125 	return 0;
126 }
127 
128 static int ena_com_admin_init_aenq(struct ena_com_dev *ena_dev,
129 				   struct ena_aenq_handlers *aenq_handlers)
130 {
131 	struct ena_com_aenq *aenq = &ena_dev->aenq;
132 	u32 addr_low, addr_high, aenq_caps;
133 	u16 size;
134 
135 	ena_dev->aenq.q_depth = ENA_ASYNC_QUEUE_DEPTH;
136 	size = ADMIN_AENQ_SIZE(ENA_ASYNC_QUEUE_DEPTH);
137 	aenq->entries = dma_alloc_coherent(ena_dev->dmadev, size,
138 					   &aenq->dma_addr, GFP_KERNEL);
139 
140 	if (!aenq->entries) {
141 		netdev_err(ena_dev->net_device, "Memory allocation failed\n");
142 		return -ENOMEM;
143 	}
144 
145 	aenq->head = aenq->q_depth;
146 	aenq->phase = 1;
147 
148 	addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(aenq->dma_addr);
149 	addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(aenq->dma_addr);
150 
151 	writel(addr_low, ena_dev->reg_bar + ENA_REGS_AENQ_BASE_LO_OFF);
152 	writel(addr_high, ena_dev->reg_bar + ENA_REGS_AENQ_BASE_HI_OFF);
153 
154 	aenq_caps = 0;
155 	aenq_caps |= ena_dev->aenq.q_depth & ENA_REGS_AENQ_CAPS_AENQ_DEPTH_MASK;
156 	aenq_caps |= (sizeof(struct ena_admin_aenq_entry)
157 		      << ENA_REGS_AENQ_CAPS_AENQ_ENTRY_SIZE_SHIFT) &
158 		     ENA_REGS_AENQ_CAPS_AENQ_ENTRY_SIZE_MASK;
159 	writel(aenq_caps, ena_dev->reg_bar + ENA_REGS_AENQ_CAPS_OFF);
160 
161 	if (unlikely(!aenq_handlers)) {
162 		netdev_err(ena_dev->net_device,
163 			   "AENQ handlers pointer is NULL\n");
164 		return -EINVAL;
165 	}
166 
167 	aenq->aenq_handlers = aenq_handlers;
168 
169 	return 0;
170 }
171 
172 static void comp_ctxt_release(struct ena_com_admin_queue *queue,
173 				     struct ena_comp_ctx *comp_ctx)
174 {
175 	comp_ctx->occupied = false;
176 	atomic_dec(&queue->outstanding_cmds);
177 }
178 
179 static struct ena_comp_ctx *get_comp_ctxt(struct ena_com_admin_queue *admin_queue,
180 					  u16 command_id, bool capture)
181 {
182 	if (unlikely(command_id >= admin_queue->q_depth)) {
183 		netdev_err(admin_queue->ena_dev->net_device,
184 			   "Command id is larger than the queue size. cmd_id: %u queue size %d\n",
185 			   command_id, admin_queue->q_depth);
186 		return NULL;
187 	}
188 
189 	if (unlikely(!admin_queue->comp_ctx)) {
190 		netdev_err(admin_queue->ena_dev->net_device,
191 			   "Completion context is NULL\n");
192 		return NULL;
193 	}
194 
195 	if (unlikely(admin_queue->comp_ctx[command_id].occupied && capture)) {
196 		netdev_err(admin_queue->ena_dev->net_device,
197 			   "Completion context is occupied\n");
198 		return NULL;
199 	}
200 
201 	if (capture) {
202 		atomic_inc(&admin_queue->outstanding_cmds);
203 		admin_queue->comp_ctx[command_id].occupied = true;
204 	}
205 
206 	return &admin_queue->comp_ctx[command_id];
207 }
208 
209 static struct ena_comp_ctx *__ena_com_submit_admin_cmd(struct ena_com_admin_queue *admin_queue,
210 						       struct ena_admin_aq_entry *cmd,
211 						       size_t cmd_size_in_bytes,
212 						       struct ena_admin_acq_entry *comp,
213 						       size_t comp_size_in_bytes)
214 {
215 	struct ena_comp_ctx *comp_ctx;
216 	u16 tail_masked, cmd_id;
217 	u16 queue_size_mask;
218 	u16 cnt;
219 
220 	queue_size_mask = admin_queue->q_depth - 1;
221 
222 	tail_masked = admin_queue->sq.tail & queue_size_mask;
223 
224 	/* In case of queue FULL */
225 	cnt = (u16)atomic_read(&admin_queue->outstanding_cmds);
226 	if (cnt >= admin_queue->q_depth) {
227 		netdev_dbg(admin_queue->ena_dev->net_device,
228 			   "Admin queue is full.\n");
229 		admin_queue->stats.out_of_space++;
230 		return ERR_PTR(-ENOSPC);
231 	}
232 
233 	cmd_id = admin_queue->curr_cmd_id;
234 
235 	cmd->aq_common_descriptor.flags |= admin_queue->sq.phase &
236 		ENA_ADMIN_AQ_COMMON_DESC_PHASE_MASK;
237 
238 	cmd->aq_common_descriptor.command_id |= cmd_id &
239 		ENA_ADMIN_AQ_COMMON_DESC_COMMAND_ID_MASK;
240 
241 	comp_ctx = get_comp_ctxt(admin_queue, cmd_id, true);
242 	if (unlikely(!comp_ctx))
243 		return ERR_PTR(-EINVAL);
244 
245 	comp_ctx->status = ENA_CMD_SUBMITTED;
246 	comp_ctx->comp_size = (u32)comp_size_in_bytes;
247 	comp_ctx->user_cqe = comp;
248 	comp_ctx->cmd_opcode = cmd->aq_common_descriptor.opcode;
249 
250 	reinit_completion(&comp_ctx->wait_event);
251 
252 	memcpy(&admin_queue->sq.entries[tail_masked], cmd, cmd_size_in_bytes);
253 
254 	admin_queue->curr_cmd_id = (admin_queue->curr_cmd_id + 1) &
255 		queue_size_mask;
256 
257 	admin_queue->sq.tail++;
258 	admin_queue->stats.submitted_cmd++;
259 
260 	if (unlikely((admin_queue->sq.tail & queue_size_mask) == 0))
261 		admin_queue->sq.phase = !admin_queue->sq.phase;
262 
263 	writel(admin_queue->sq.tail, admin_queue->sq.db_addr);
264 
265 	return comp_ctx;
266 }
267 
268 static int ena_com_init_comp_ctxt(struct ena_com_admin_queue *admin_queue)
269 {
270 	struct ena_com_dev *ena_dev = admin_queue->ena_dev;
271 	size_t size = admin_queue->q_depth * sizeof(struct ena_comp_ctx);
272 	struct ena_comp_ctx *comp_ctx;
273 	u16 i;
274 
275 	admin_queue->comp_ctx =
276 		devm_kzalloc(admin_queue->q_dmadev, size, GFP_KERNEL);
277 	if (unlikely(!admin_queue->comp_ctx)) {
278 		netdev_err(ena_dev->net_device, "Memory allocation failed\n");
279 		return -ENOMEM;
280 	}
281 
282 	for (i = 0; i < admin_queue->q_depth; i++) {
283 		comp_ctx = get_comp_ctxt(admin_queue, i, false);
284 		if (comp_ctx)
285 			init_completion(&comp_ctx->wait_event);
286 	}
287 
288 	return 0;
289 }
290 
291 static struct ena_comp_ctx *ena_com_submit_admin_cmd(struct ena_com_admin_queue *admin_queue,
292 						     struct ena_admin_aq_entry *cmd,
293 						     size_t cmd_size_in_bytes,
294 						     struct ena_admin_acq_entry *comp,
295 						     size_t comp_size_in_bytes)
296 {
297 	unsigned long flags = 0;
298 	struct ena_comp_ctx *comp_ctx;
299 
300 	spin_lock_irqsave(&admin_queue->q_lock, flags);
301 	if (unlikely(!admin_queue->running_state)) {
302 		spin_unlock_irqrestore(&admin_queue->q_lock, flags);
303 		return ERR_PTR(-ENODEV);
304 	}
305 	comp_ctx = __ena_com_submit_admin_cmd(admin_queue, cmd,
306 					      cmd_size_in_bytes,
307 					      comp,
308 					      comp_size_in_bytes);
309 	if (IS_ERR(comp_ctx))
310 		admin_queue->running_state = false;
311 	spin_unlock_irqrestore(&admin_queue->q_lock, flags);
312 
313 	return comp_ctx;
314 }
315 
316 static int ena_com_init_io_sq(struct ena_com_dev *ena_dev,
317 			      struct ena_com_create_io_ctx *ctx,
318 			      struct ena_com_io_sq *io_sq)
319 {
320 	size_t size;
321 	int dev_node = 0;
322 
323 	memset(&io_sq->desc_addr, 0x0, sizeof(io_sq->desc_addr));
324 
325 	io_sq->dma_addr_bits = (u8)ena_dev->dma_addr_bits;
326 	io_sq->desc_entry_size =
327 		(io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX) ?
328 		sizeof(struct ena_eth_io_tx_desc) :
329 		sizeof(struct ena_eth_io_rx_desc);
330 
331 	size = io_sq->desc_entry_size * io_sq->q_depth;
332 
333 	if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST) {
334 		dev_node = dev_to_node(ena_dev->dmadev);
335 		set_dev_node(ena_dev->dmadev, ctx->numa_node);
336 		io_sq->desc_addr.virt_addr =
337 			dma_alloc_coherent(ena_dev->dmadev, size,
338 					   &io_sq->desc_addr.phys_addr,
339 					   GFP_KERNEL);
340 		set_dev_node(ena_dev->dmadev, dev_node);
341 		if (!io_sq->desc_addr.virt_addr) {
342 			io_sq->desc_addr.virt_addr =
343 				dma_alloc_coherent(ena_dev->dmadev, size,
344 						   &io_sq->desc_addr.phys_addr,
345 						   GFP_KERNEL);
346 		}
347 
348 		if (!io_sq->desc_addr.virt_addr) {
349 			netdev_err(ena_dev->net_device,
350 				   "Memory allocation failed\n");
351 			return -ENOMEM;
352 		}
353 	}
354 
355 	if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
356 		/* Allocate bounce buffers */
357 		io_sq->bounce_buf_ctrl.buffer_size =
358 			ena_dev->llq_info.desc_list_entry_size;
359 		io_sq->bounce_buf_ctrl.buffers_num =
360 			ENA_COM_BOUNCE_BUFFER_CNTRL_CNT;
361 		io_sq->bounce_buf_ctrl.next_to_use = 0;
362 
363 		size = io_sq->bounce_buf_ctrl.buffer_size *
364 			io_sq->bounce_buf_ctrl.buffers_num;
365 
366 		dev_node = dev_to_node(ena_dev->dmadev);
367 		set_dev_node(ena_dev->dmadev, ctx->numa_node);
368 		io_sq->bounce_buf_ctrl.base_buffer =
369 			devm_kzalloc(ena_dev->dmadev, size, GFP_KERNEL);
370 		set_dev_node(ena_dev->dmadev, dev_node);
371 		if (!io_sq->bounce_buf_ctrl.base_buffer)
372 			io_sq->bounce_buf_ctrl.base_buffer =
373 				devm_kzalloc(ena_dev->dmadev, size, GFP_KERNEL);
374 
375 		if (!io_sq->bounce_buf_ctrl.base_buffer) {
376 			netdev_err(ena_dev->net_device,
377 				   "Bounce buffer memory allocation failed\n");
378 			return -ENOMEM;
379 		}
380 
381 		memcpy(&io_sq->llq_info, &ena_dev->llq_info,
382 		       sizeof(io_sq->llq_info));
383 
384 		/* Initiate the first bounce buffer */
385 		io_sq->llq_buf_ctrl.curr_bounce_buf =
386 			ena_com_get_next_bounce_buffer(&io_sq->bounce_buf_ctrl);
387 		memset(io_sq->llq_buf_ctrl.curr_bounce_buf,
388 		       0x0, io_sq->llq_info.desc_list_entry_size);
389 		io_sq->llq_buf_ctrl.descs_left_in_line =
390 			io_sq->llq_info.descs_num_before_header;
391 		io_sq->disable_meta_caching =
392 			io_sq->llq_info.disable_meta_caching;
393 
394 		if (io_sq->llq_info.max_entries_in_tx_burst > 0)
395 			io_sq->entries_in_tx_burst_left =
396 				io_sq->llq_info.max_entries_in_tx_burst;
397 	}
398 
399 	io_sq->tail = 0;
400 	io_sq->next_to_comp = 0;
401 	io_sq->phase = 1;
402 
403 	return 0;
404 }
405 
406 static int ena_com_init_io_cq(struct ena_com_dev *ena_dev,
407 			      struct ena_com_create_io_ctx *ctx,
408 			      struct ena_com_io_cq *io_cq)
409 {
410 	size_t size;
411 	int prev_node = 0;
412 
413 	memset(&io_cq->cdesc_addr, 0x0, sizeof(io_cq->cdesc_addr));
414 
415 	/* Use the basic completion descriptor for Rx */
416 	io_cq->cdesc_entry_size_in_bytes =
417 		(io_cq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX) ?
418 		sizeof(struct ena_eth_io_tx_cdesc) :
419 		sizeof(struct ena_eth_io_rx_cdesc_base);
420 
421 	size = io_cq->cdesc_entry_size_in_bytes * io_cq->q_depth;
422 
423 	prev_node = dev_to_node(ena_dev->dmadev);
424 	set_dev_node(ena_dev->dmadev, ctx->numa_node);
425 	io_cq->cdesc_addr.virt_addr =
426 		dma_alloc_coherent(ena_dev->dmadev, size,
427 				   &io_cq->cdesc_addr.phys_addr, GFP_KERNEL);
428 	set_dev_node(ena_dev->dmadev, prev_node);
429 	if (!io_cq->cdesc_addr.virt_addr) {
430 		io_cq->cdesc_addr.virt_addr =
431 			dma_alloc_coherent(ena_dev->dmadev, size,
432 					   &io_cq->cdesc_addr.phys_addr,
433 					   GFP_KERNEL);
434 	}
435 
436 	if (!io_cq->cdesc_addr.virt_addr) {
437 		netdev_err(ena_dev->net_device, "Memory allocation failed\n");
438 		return -ENOMEM;
439 	}
440 
441 	io_cq->phase = 1;
442 	io_cq->head = 0;
443 
444 	return 0;
445 }
446 
447 static void ena_com_handle_single_admin_completion(struct ena_com_admin_queue *admin_queue,
448 						   struct ena_admin_acq_entry *cqe)
449 {
450 	struct ena_comp_ctx *comp_ctx;
451 	u16 cmd_id;
452 
453 	cmd_id = cqe->acq_common_descriptor.command &
454 		ENA_ADMIN_ACQ_COMMON_DESC_COMMAND_ID_MASK;
455 
456 	comp_ctx = get_comp_ctxt(admin_queue, cmd_id, false);
457 	if (unlikely(!comp_ctx)) {
458 		netdev_err(admin_queue->ena_dev->net_device,
459 			   "comp_ctx is NULL. Changing the admin queue running state\n");
460 		admin_queue->running_state = false;
461 		return;
462 	}
463 
464 	comp_ctx->status = ENA_CMD_COMPLETED;
465 	comp_ctx->comp_status = cqe->acq_common_descriptor.status;
466 
467 	if (comp_ctx->user_cqe)
468 		memcpy(comp_ctx->user_cqe, (void *)cqe, comp_ctx->comp_size);
469 
470 	if (!admin_queue->polling)
471 		complete(&comp_ctx->wait_event);
472 }
473 
474 static void ena_com_handle_admin_completion(struct ena_com_admin_queue *admin_queue)
475 {
476 	struct ena_admin_acq_entry *cqe = NULL;
477 	u16 comp_num = 0;
478 	u16 head_masked;
479 	u8 phase;
480 
481 	head_masked = admin_queue->cq.head & (admin_queue->q_depth - 1);
482 	phase = admin_queue->cq.phase;
483 
484 	cqe = &admin_queue->cq.entries[head_masked];
485 
486 	/* Go over all the completions */
487 	while ((READ_ONCE(cqe->acq_common_descriptor.flags) &
488 		ENA_ADMIN_ACQ_COMMON_DESC_PHASE_MASK) == phase) {
489 		/* Do not read the rest of the completion entry before the
490 		 * phase bit was validated
491 		 */
492 		dma_rmb();
493 		ena_com_handle_single_admin_completion(admin_queue, cqe);
494 
495 		head_masked++;
496 		comp_num++;
497 		if (unlikely(head_masked == admin_queue->q_depth)) {
498 			head_masked = 0;
499 			phase = !phase;
500 		}
501 
502 		cqe = &admin_queue->cq.entries[head_masked];
503 	}
504 
505 	admin_queue->cq.head += comp_num;
506 	admin_queue->cq.phase = phase;
507 	admin_queue->sq.head += comp_num;
508 	admin_queue->stats.completed_cmd += comp_num;
509 }
510 
511 static int ena_com_comp_status_to_errno(struct ena_com_admin_queue *admin_queue,
512 					u8 comp_status)
513 {
514 	if (unlikely(comp_status != 0))
515 		netdev_err(admin_queue->ena_dev->net_device,
516 			   "Admin command failed[%u]\n", comp_status);
517 
518 	switch (comp_status) {
519 	case ENA_ADMIN_SUCCESS:
520 		return 0;
521 	case ENA_ADMIN_RESOURCE_ALLOCATION_FAILURE:
522 		return -ENOMEM;
523 	case ENA_ADMIN_UNSUPPORTED_OPCODE:
524 		return -EOPNOTSUPP;
525 	case ENA_ADMIN_BAD_OPCODE:
526 	case ENA_ADMIN_MALFORMED_REQUEST:
527 	case ENA_ADMIN_ILLEGAL_PARAMETER:
528 	case ENA_ADMIN_UNKNOWN_ERROR:
529 		return -EINVAL;
530 	case ENA_ADMIN_RESOURCE_BUSY:
531 		return -EAGAIN;
532 	}
533 
534 	return -EINVAL;
535 }
536 
537 static void ena_delay_exponential_backoff_us(u32 exp, u32 delay_us)
538 {
539 	delay_us = max_t(u32, ENA_MIN_ADMIN_POLL_US, delay_us);
540 	delay_us = min_t(u32, delay_us * (1U << exp), ENA_MAX_ADMIN_POLL_US);
541 	usleep_range(delay_us, 2 * delay_us);
542 }
543 
544 static int ena_com_wait_and_process_admin_cq_polling(struct ena_comp_ctx *comp_ctx,
545 						     struct ena_com_admin_queue *admin_queue)
546 {
547 	unsigned long flags = 0;
548 	unsigned long timeout;
549 	int ret;
550 	u32 exp = 0;
551 
552 	timeout = jiffies + usecs_to_jiffies(admin_queue->completion_timeout);
553 
554 	while (1) {
555 		spin_lock_irqsave(&admin_queue->q_lock, flags);
556 		ena_com_handle_admin_completion(admin_queue);
557 		spin_unlock_irqrestore(&admin_queue->q_lock, flags);
558 
559 		if (comp_ctx->status != ENA_CMD_SUBMITTED)
560 			break;
561 
562 		if (time_is_before_jiffies(timeout)) {
563 			netdev_err(admin_queue->ena_dev->net_device,
564 				   "Wait for completion (polling) timeout\n");
565 			/* ENA didn't have any completion */
566 			spin_lock_irqsave(&admin_queue->q_lock, flags);
567 			admin_queue->stats.no_completion++;
568 			admin_queue->running_state = false;
569 			spin_unlock_irqrestore(&admin_queue->q_lock, flags);
570 
571 			ret = -ETIME;
572 			goto err;
573 		}
574 
575 		ena_delay_exponential_backoff_us(exp++,
576 						 admin_queue->ena_dev->ena_min_poll_delay_us);
577 	}
578 
579 	if (unlikely(comp_ctx->status == ENA_CMD_ABORTED)) {
580 		netdev_err(admin_queue->ena_dev->net_device,
581 			   "Command was aborted\n");
582 		spin_lock_irqsave(&admin_queue->q_lock, flags);
583 		admin_queue->stats.aborted_cmd++;
584 		spin_unlock_irqrestore(&admin_queue->q_lock, flags);
585 		ret = -ENODEV;
586 		goto err;
587 	}
588 
589 	WARN(comp_ctx->status != ENA_CMD_COMPLETED, "Invalid comp status %d\n",
590 	     comp_ctx->status);
591 
592 	ret = ena_com_comp_status_to_errno(admin_queue, comp_ctx->comp_status);
593 err:
594 	comp_ctxt_release(admin_queue, comp_ctx);
595 	return ret;
596 }
597 
598 /*
599  * Set the LLQ configurations of the firmware
600  *
601  * The driver provides only the enabled feature values to the device,
602  * which in turn, checks if they are supported.
603  */
604 static int ena_com_set_llq(struct ena_com_dev *ena_dev)
605 {
606 	struct ena_com_admin_queue *admin_queue;
607 	struct ena_admin_set_feat_cmd cmd;
608 	struct ena_admin_set_feat_resp resp;
609 	struct ena_com_llq_info *llq_info = &ena_dev->llq_info;
610 	int ret;
611 
612 	memset(&cmd, 0x0, sizeof(cmd));
613 	admin_queue = &ena_dev->admin_queue;
614 
615 	cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
616 	cmd.feat_common.feature_id = ENA_ADMIN_LLQ;
617 
618 	cmd.u.llq.header_location_ctrl_enabled = llq_info->header_location_ctrl;
619 	cmd.u.llq.entry_size_ctrl_enabled = llq_info->desc_list_entry_size_ctrl;
620 	cmd.u.llq.desc_num_before_header_enabled = llq_info->descs_num_before_header;
621 	cmd.u.llq.descriptors_stride_ctrl_enabled = llq_info->desc_stride_ctrl;
622 
623 	cmd.u.llq.accel_mode.u.set.enabled_flags =
624 		BIT(ENA_ADMIN_DISABLE_META_CACHING) |
625 		BIT(ENA_ADMIN_LIMIT_TX_BURST);
626 
627 	ret = ena_com_execute_admin_command(admin_queue,
628 					    (struct ena_admin_aq_entry *)&cmd,
629 					    sizeof(cmd),
630 					    (struct ena_admin_acq_entry *)&resp,
631 					    sizeof(resp));
632 
633 	if (unlikely(ret))
634 		netdev_err(ena_dev->net_device,
635 			   "Failed to set LLQ configurations: %d\n", ret);
636 
637 	return ret;
638 }
639 
640 static int ena_com_config_llq_info(struct ena_com_dev *ena_dev,
641 				   struct ena_admin_feature_llq_desc *llq_features,
642 				   struct ena_llq_configurations *llq_default_cfg)
643 {
644 	struct ena_com_llq_info *llq_info = &ena_dev->llq_info;
645 	struct ena_admin_accel_mode_get llq_accel_mode_get;
646 	u16 supported_feat;
647 	int rc;
648 
649 	memset(llq_info, 0, sizeof(*llq_info));
650 
651 	supported_feat = llq_features->header_location_ctrl_supported;
652 
653 	if (likely(supported_feat & llq_default_cfg->llq_header_location)) {
654 		llq_info->header_location_ctrl =
655 			llq_default_cfg->llq_header_location;
656 	} else {
657 		netdev_err(ena_dev->net_device,
658 			   "Invalid header location control, supported: 0x%x\n",
659 			   supported_feat);
660 		return -EINVAL;
661 	}
662 
663 	if (likely(llq_info->header_location_ctrl == ENA_ADMIN_INLINE_HEADER)) {
664 		supported_feat = llq_features->descriptors_stride_ctrl_supported;
665 		if (likely(supported_feat & llq_default_cfg->llq_stride_ctrl)) {
666 			llq_info->desc_stride_ctrl = llq_default_cfg->llq_stride_ctrl;
667 		} else	{
668 			if (supported_feat & ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY) {
669 				llq_info->desc_stride_ctrl = ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY;
670 			} else if (supported_feat & ENA_ADMIN_SINGLE_DESC_PER_ENTRY) {
671 				llq_info->desc_stride_ctrl = ENA_ADMIN_SINGLE_DESC_PER_ENTRY;
672 			} else {
673 				netdev_err(ena_dev->net_device,
674 					   "Invalid desc_stride_ctrl, supported: 0x%x\n",
675 					   supported_feat);
676 				return -EINVAL;
677 			}
678 
679 			netdev_err(ena_dev->net_device,
680 				   "Default llq stride ctrl is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n",
681 				   llq_default_cfg->llq_stride_ctrl,
682 				   supported_feat, llq_info->desc_stride_ctrl);
683 		}
684 	} else {
685 		llq_info->desc_stride_ctrl = 0;
686 	}
687 
688 	supported_feat = llq_features->entry_size_ctrl_supported;
689 	if (likely(supported_feat & llq_default_cfg->llq_ring_entry_size)) {
690 		llq_info->desc_list_entry_size_ctrl = llq_default_cfg->llq_ring_entry_size;
691 		llq_info->desc_list_entry_size = llq_default_cfg->llq_ring_entry_size_value;
692 	} else {
693 		if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_128B) {
694 			llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_128B;
695 			llq_info->desc_list_entry_size = 128;
696 		} else if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_192B) {
697 			llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_192B;
698 			llq_info->desc_list_entry_size = 192;
699 		} else if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_256B) {
700 			llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_256B;
701 			llq_info->desc_list_entry_size = 256;
702 		} else {
703 			netdev_err(ena_dev->net_device,
704 				   "Invalid entry_size_ctrl, supported: 0x%x\n",
705 				   supported_feat);
706 			return -EINVAL;
707 		}
708 
709 		netdev_err(ena_dev->net_device,
710 			   "Default llq ring entry size is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n",
711 			   llq_default_cfg->llq_ring_entry_size, supported_feat,
712 			   llq_info->desc_list_entry_size);
713 	}
714 	if (unlikely(llq_info->desc_list_entry_size & 0x7)) {
715 		/* The desc list entry size should be whole multiply of 8
716 		 * This requirement comes from __iowrite64_copy()
717 		 */
718 		netdev_err(ena_dev->net_device, "Illegal entry size %d\n",
719 			   llq_info->desc_list_entry_size);
720 		return -EINVAL;
721 	}
722 
723 	if (llq_info->desc_stride_ctrl == ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY)
724 		llq_info->descs_per_entry = llq_info->desc_list_entry_size /
725 			sizeof(struct ena_eth_io_tx_desc);
726 	else
727 		llq_info->descs_per_entry = 1;
728 
729 	supported_feat = llq_features->desc_num_before_header_supported;
730 	if (likely(supported_feat & llq_default_cfg->llq_num_decs_before_header)) {
731 		llq_info->descs_num_before_header = llq_default_cfg->llq_num_decs_before_header;
732 	} else {
733 		if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2) {
734 			llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2;
735 		} else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_1) {
736 			llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_1;
737 		} else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_4) {
738 			llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_4;
739 		} else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_8) {
740 			llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_8;
741 		} else {
742 			netdev_err(ena_dev->net_device,
743 				   "Invalid descs_num_before_header, supported: 0x%x\n",
744 				   supported_feat);
745 			return -EINVAL;
746 		}
747 
748 		netdev_err(ena_dev->net_device,
749 			   "Default llq num descs before header is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n",
750 			   llq_default_cfg->llq_num_decs_before_header,
751 			   supported_feat, llq_info->descs_num_before_header);
752 	}
753 	/* Check for accelerated queue supported */
754 	llq_accel_mode_get = llq_features->accel_mode.u.get;
755 
756 	llq_info->disable_meta_caching =
757 		!!(llq_accel_mode_get.supported_flags &
758 		   BIT(ENA_ADMIN_DISABLE_META_CACHING));
759 
760 	if (llq_accel_mode_get.supported_flags & BIT(ENA_ADMIN_LIMIT_TX_BURST))
761 		llq_info->max_entries_in_tx_burst =
762 			llq_accel_mode_get.max_tx_burst_size /
763 			llq_default_cfg->llq_ring_entry_size_value;
764 
765 	rc = ena_com_set_llq(ena_dev);
766 	if (rc)
767 		netdev_err(ena_dev->net_device,
768 			   "Cannot set LLQ configuration: %d\n", rc);
769 
770 	return rc;
771 }
772 
773 static int ena_com_wait_and_process_admin_cq_interrupts(struct ena_comp_ctx *comp_ctx,
774 							struct ena_com_admin_queue *admin_queue)
775 {
776 	unsigned long flags = 0;
777 	int ret;
778 
779 	wait_for_completion_timeout(&comp_ctx->wait_event,
780 				    usecs_to_jiffies(
781 					    admin_queue->completion_timeout));
782 
783 	/* In case the command wasn't completed find out the root cause.
784 	 * There might be 2 kinds of errors
785 	 * 1) No completion (timeout reached)
786 	 * 2) There is completion but the device didn't get any msi-x interrupt.
787 	 */
788 	if (unlikely(comp_ctx->status == ENA_CMD_SUBMITTED)) {
789 		spin_lock_irqsave(&admin_queue->q_lock, flags);
790 		ena_com_handle_admin_completion(admin_queue);
791 		admin_queue->stats.no_completion++;
792 		spin_unlock_irqrestore(&admin_queue->q_lock, flags);
793 
794 		if (comp_ctx->status == ENA_CMD_COMPLETED) {
795 			netdev_err(admin_queue->ena_dev->net_device,
796 				   "The ena device sent a completion but the driver didn't receive a MSI-X interrupt (cmd %d), autopolling mode is %s\n",
797 				   comp_ctx->cmd_opcode,
798 				   admin_queue->auto_polling ? "ON" : "OFF");
799 			/* Check if fallback to polling is enabled */
800 			if (admin_queue->auto_polling)
801 				admin_queue->polling = true;
802 		} else {
803 			netdev_err(admin_queue->ena_dev->net_device,
804 				   "The ena device didn't send a completion for the admin cmd %d status %d\n",
805 				   comp_ctx->cmd_opcode, comp_ctx->status);
806 		}
807 		/* Check if shifted to polling mode.
808 		 * This will happen if there is a completion without an interrupt
809 		 * and autopolling mode is enabled. Continuing normal execution in such case
810 		 */
811 		if (!admin_queue->polling) {
812 			admin_queue->running_state = false;
813 			ret = -ETIME;
814 			goto err;
815 		}
816 	}
817 
818 	ret = ena_com_comp_status_to_errno(admin_queue, comp_ctx->comp_status);
819 err:
820 	comp_ctxt_release(admin_queue, comp_ctx);
821 	return ret;
822 }
823 
824 /* This method read the hardware device register through posting writes
825  * and waiting for response
826  * On timeout the function will return ENA_MMIO_READ_TIMEOUT
827  */
828 static u32 ena_com_reg_bar_read32(struct ena_com_dev *ena_dev, u16 offset)
829 {
830 	struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
831 	volatile struct ena_admin_ena_mmio_req_read_less_resp *read_resp =
832 		mmio_read->read_resp;
833 	u32 mmio_read_reg, ret, i;
834 	unsigned long flags = 0;
835 	u32 timeout = mmio_read->reg_read_to;
836 
837 	might_sleep();
838 
839 	if (timeout == 0)
840 		timeout = ENA_REG_READ_TIMEOUT;
841 
842 	/* If readless is disabled, perform regular read */
843 	if (!mmio_read->readless_supported)
844 		return readl(ena_dev->reg_bar + offset);
845 
846 	spin_lock_irqsave(&mmio_read->lock, flags);
847 	mmio_read->seq_num++;
848 
849 	read_resp->req_id = mmio_read->seq_num + 0xDEAD;
850 	mmio_read_reg = (offset << ENA_REGS_MMIO_REG_READ_REG_OFF_SHIFT) &
851 			ENA_REGS_MMIO_REG_READ_REG_OFF_MASK;
852 	mmio_read_reg |= mmio_read->seq_num &
853 			ENA_REGS_MMIO_REG_READ_REQ_ID_MASK;
854 
855 	writel(mmio_read_reg, ena_dev->reg_bar + ENA_REGS_MMIO_REG_READ_OFF);
856 
857 	for (i = 0; i < timeout; i++) {
858 		if (READ_ONCE(read_resp->req_id) == mmio_read->seq_num)
859 			break;
860 
861 		udelay(1);
862 	}
863 
864 	if (unlikely(i == timeout)) {
865 		netdev_err(ena_dev->net_device,
866 			   "Reading reg failed for timeout. expected: req id[%hu] offset[%hu] actual: req id[%hu] offset[%hu]\n",
867 			   mmio_read->seq_num, offset, read_resp->req_id,
868 			   read_resp->reg_off);
869 		ret = ENA_MMIO_READ_TIMEOUT;
870 		goto err;
871 	}
872 
873 	if (read_resp->reg_off != offset) {
874 		netdev_err(ena_dev->net_device,
875 			   "Read failure: wrong offset provided\n");
876 		ret = ENA_MMIO_READ_TIMEOUT;
877 	} else {
878 		ret = read_resp->reg_val;
879 	}
880 err:
881 	spin_unlock_irqrestore(&mmio_read->lock, flags);
882 
883 	return ret;
884 }
885 
886 /* There are two types to wait for completion.
887  * Polling mode - wait until the completion is available.
888  * Async mode - wait on wait queue until the completion is ready
889  * (or the timeout expired).
890  * It is expected that the IRQ called ena_com_handle_admin_completion
891  * to mark the completions.
892  */
893 static int ena_com_wait_and_process_admin_cq(struct ena_comp_ctx *comp_ctx,
894 					     struct ena_com_admin_queue *admin_queue)
895 {
896 	if (admin_queue->polling)
897 		return ena_com_wait_and_process_admin_cq_polling(comp_ctx,
898 								 admin_queue);
899 
900 	return ena_com_wait_and_process_admin_cq_interrupts(comp_ctx,
901 							    admin_queue);
902 }
903 
904 static int ena_com_destroy_io_sq(struct ena_com_dev *ena_dev,
905 				 struct ena_com_io_sq *io_sq)
906 {
907 	struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
908 	struct ena_admin_aq_destroy_sq_cmd destroy_cmd;
909 	struct ena_admin_acq_destroy_sq_resp_desc destroy_resp;
910 	u8 direction;
911 	int ret;
912 
913 	memset(&destroy_cmd, 0x0, sizeof(destroy_cmd));
914 
915 	if (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
916 		direction = ENA_ADMIN_SQ_DIRECTION_TX;
917 	else
918 		direction = ENA_ADMIN_SQ_DIRECTION_RX;
919 
920 	destroy_cmd.sq.sq_identity |= (direction <<
921 		ENA_ADMIN_SQ_SQ_DIRECTION_SHIFT) &
922 		ENA_ADMIN_SQ_SQ_DIRECTION_MASK;
923 
924 	destroy_cmd.sq.sq_idx = io_sq->idx;
925 	destroy_cmd.aq_common_descriptor.opcode = ENA_ADMIN_DESTROY_SQ;
926 
927 	ret = ena_com_execute_admin_command(admin_queue,
928 					    (struct ena_admin_aq_entry *)&destroy_cmd,
929 					    sizeof(destroy_cmd),
930 					    (struct ena_admin_acq_entry *)&destroy_resp,
931 					    sizeof(destroy_resp));
932 
933 	if (unlikely(ret && (ret != -ENODEV)))
934 		netdev_err(ena_dev->net_device,
935 			   "Failed to destroy io sq error: %d\n", ret);
936 
937 	return ret;
938 }
939 
940 static void ena_com_io_queue_free(struct ena_com_dev *ena_dev,
941 				  struct ena_com_io_sq *io_sq,
942 				  struct ena_com_io_cq *io_cq)
943 {
944 	size_t size;
945 
946 	if (io_cq->cdesc_addr.virt_addr) {
947 		size = io_cq->cdesc_entry_size_in_bytes * io_cq->q_depth;
948 
949 		dma_free_coherent(ena_dev->dmadev, size,
950 				  io_cq->cdesc_addr.virt_addr,
951 				  io_cq->cdesc_addr.phys_addr);
952 
953 		io_cq->cdesc_addr.virt_addr = NULL;
954 	}
955 
956 	if (io_sq->desc_addr.virt_addr) {
957 		size = io_sq->desc_entry_size * io_sq->q_depth;
958 
959 		dma_free_coherent(ena_dev->dmadev, size,
960 				  io_sq->desc_addr.virt_addr,
961 				  io_sq->desc_addr.phys_addr);
962 
963 		io_sq->desc_addr.virt_addr = NULL;
964 	}
965 
966 	if (io_sq->bounce_buf_ctrl.base_buffer) {
967 		devm_kfree(ena_dev->dmadev, io_sq->bounce_buf_ctrl.base_buffer);
968 		io_sq->bounce_buf_ctrl.base_buffer = NULL;
969 	}
970 }
971 
972 static int wait_for_reset_state(struct ena_com_dev *ena_dev, u32 timeout,
973 				u16 exp_state)
974 {
975 	u32 val, exp = 0;
976 	unsigned long timeout_stamp;
977 
978 	/* Convert timeout from resolution of 100ms to us resolution. */
979 	timeout_stamp = jiffies + usecs_to_jiffies(100 * 1000 * timeout);
980 
981 	while (1) {
982 		val = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
983 
984 		if (unlikely(val == ENA_MMIO_READ_TIMEOUT)) {
985 			netdev_err(ena_dev->net_device,
986 				   "Reg read timeout occurred\n");
987 			return -ETIME;
988 		}
989 
990 		if ((val & ENA_REGS_DEV_STS_RESET_IN_PROGRESS_MASK) ==
991 			exp_state)
992 			return 0;
993 
994 		if (time_is_before_jiffies(timeout_stamp))
995 			return -ETIME;
996 
997 		ena_delay_exponential_backoff_us(exp++, ena_dev->ena_min_poll_delay_us);
998 	}
999 }
1000 
1001 static bool ena_com_check_supported_feature_id(struct ena_com_dev *ena_dev,
1002 					       enum ena_admin_aq_feature_id feature_id)
1003 {
1004 	u32 feature_mask = 1 << feature_id;
1005 
1006 	/* Device attributes is always supported */
1007 	if ((feature_id != ENA_ADMIN_DEVICE_ATTRIBUTES) &&
1008 	    !(ena_dev->supported_features & feature_mask))
1009 		return false;
1010 
1011 	return true;
1012 }
1013 
1014 static int ena_com_get_feature_ex(struct ena_com_dev *ena_dev,
1015 				  struct ena_admin_get_feat_resp *get_resp,
1016 				  enum ena_admin_aq_feature_id feature_id,
1017 				  dma_addr_t control_buf_dma_addr,
1018 				  u32 control_buff_size,
1019 				  u8 feature_ver)
1020 {
1021 	struct ena_com_admin_queue *admin_queue;
1022 	struct ena_admin_get_feat_cmd get_cmd;
1023 	int ret;
1024 
1025 	if (!ena_com_check_supported_feature_id(ena_dev, feature_id)) {
1026 		netdev_dbg(ena_dev->net_device, "Feature %d isn't supported\n",
1027 			   feature_id);
1028 		return -EOPNOTSUPP;
1029 	}
1030 
1031 	memset(&get_cmd, 0x0, sizeof(get_cmd));
1032 	admin_queue = &ena_dev->admin_queue;
1033 
1034 	get_cmd.aq_common_descriptor.opcode = ENA_ADMIN_GET_FEATURE;
1035 
1036 	if (control_buff_size)
1037 		get_cmd.aq_common_descriptor.flags =
1038 			ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
1039 	else
1040 		get_cmd.aq_common_descriptor.flags = 0;
1041 
1042 	ret = ena_com_mem_addr_set(ena_dev,
1043 				   &get_cmd.control_buffer.address,
1044 				   control_buf_dma_addr);
1045 	if (unlikely(ret)) {
1046 		netdev_err(ena_dev->net_device, "Memory address set failed\n");
1047 		return ret;
1048 	}
1049 
1050 	get_cmd.control_buffer.length = control_buff_size;
1051 	get_cmd.feat_common.feature_version = feature_ver;
1052 	get_cmd.feat_common.feature_id = feature_id;
1053 
1054 	ret = ena_com_execute_admin_command(admin_queue,
1055 					    (struct ena_admin_aq_entry *)
1056 					    &get_cmd,
1057 					    sizeof(get_cmd),
1058 					    (struct ena_admin_acq_entry *)
1059 					    get_resp,
1060 					    sizeof(*get_resp));
1061 
1062 	if (unlikely(ret))
1063 		netdev_err(ena_dev->net_device,
1064 			   "Failed to submit get_feature command %d error: %d\n",
1065 			   feature_id, ret);
1066 
1067 	return ret;
1068 }
1069 
1070 static int ena_com_get_feature(struct ena_com_dev *ena_dev,
1071 			       struct ena_admin_get_feat_resp *get_resp,
1072 			       enum ena_admin_aq_feature_id feature_id,
1073 			       u8 feature_ver)
1074 {
1075 	return ena_com_get_feature_ex(ena_dev,
1076 				      get_resp,
1077 				      feature_id,
1078 				      0,
1079 				      0,
1080 				      feature_ver);
1081 }
1082 
1083 int ena_com_get_current_hash_function(struct ena_com_dev *ena_dev)
1084 {
1085 	return ena_dev->rss.hash_func;
1086 }
1087 
1088 static void ena_com_hash_key_fill_default_key(struct ena_com_dev *ena_dev)
1089 {
1090 	struct ena_admin_feature_rss_flow_hash_control *hash_key =
1091 		(ena_dev->rss).hash_key;
1092 
1093 	netdev_rss_key_fill(&hash_key->key, sizeof(hash_key->key));
1094 	/* The key buffer is stored in the device in an array of
1095 	 * uint32 elements.
1096 	 */
1097 	hash_key->key_parts = ENA_ADMIN_RSS_KEY_PARTS;
1098 }
1099 
1100 static int ena_com_hash_key_allocate(struct ena_com_dev *ena_dev)
1101 {
1102 	struct ena_rss *rss = &ena_dev->rss;
1103 
1104 	if (!ena_com_check_supported_feature_id(ena_dev,
1105 						ENA_ADMIN_RSS_HASH_FUNCTION))
1106 		return -EOPNOTSUPP;
1107 
1108 	rss->hash_key =
1109 		dma_alloc_coherent(ena_dev->dmadev, sizeof(*rss->hash_key),
1110 				   &rss->hash_key_dma_addr, GFP_KERNEL);
1111 
1112 	if (unlikely(!rss->hash_key))
1113 		return -ENOMEM;
1114 
1115 	return 0;
1116 }
1117 
1118 static void ena_com_hash_key_destroy(struct ena_com_dev *ena_dev)
1119 {
1120 	struct ena_rss *rss = &ena_dev->rss;
1121 
1122 	if (rss->hash_key)
1123 		dma_free_coherent(ena_dev->dmadev, sizeof(*rss->hash_key),
1124 				  rss->hash_key, rss->hash_key_dma_addr);
1125 	rss->hash_key = NULL;
1126 }
1127 
1128 static int ena_com_hash_ctrl_init(struct ena_com_dev *ena_dev)
1129 {
1130 	struct ena_rss *rss = &ena_dev->rss;
1131 
1132 	rss->hash_ctrl =
1133 		dma_alloc_coherent(ena_dev->dmadev, sizeof(*rss->hash_ctrl),
1134 				   &rss->hash_ctrl_dma_addr, GFP_KERNEL);
1135 
1136 	if (unlikely(!rss->hash_ctrl))
1137 		return -ENOMEM;
1138 
1139 	return 0;
1140 }
1141 
1142 static void ena_com_hash_ctrl_destroy(struct ena_com_dev *ena_dev)
1143 {
1144 	struct ena_rss *rss = &ena_dev->rss;
1145 
1146 	if (rss->hash_ctrl)
1147 		dma_free_coherent(ena_dev->dmadev, sizeof(*rss->hash_ctrl),
1148 				  rss->hash_ctrl, rss->hash_ctrl_dma_addr);
1149 	rss->hash_ctrl = NULL;
1150 }
1151 
1152 static int ena_com_indirect_table_allocate(struct ena_com_dev *ena_dev,
1153 					   u16 log_size)
1154 {
1155 	struct ena_rss *rss = &ena_dev->rss;
1156 	struct ena_admin_get_feat_resp get_resp;
1157 	size_t tbl_size;
1158 	int ret;
1159 
1160 	ret = ena_com_get_feature(ena_dev, &get_resp,
1161 				  ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG, 0);
1162 	if (unlikely(ret))
1163 		return ret;
1164 
1165 	if ((get_resp.u.ind_table.min_size > log_size) ||
1166 	    (get_resp.u.ind_table.max_size < log_size)) {
1167 		netdev_err(ena_dev->net_device,
1168 			   "Indirect table size doesn't fit. requested size: %d while min is:%d and max %d\n",
1169 			   1 << log_size, 1 << get_resp.u.ind_table.min_size,
1170 			   1 << get_resp.u.ind_table.max_size);
1171 		return -EINVAL;
1172 	}
1173 
1174 	tbl_size = (1ULL << log_size) *
1175 		sizeof(struct ena_admin_rss_ind_table_entry);
1176 
1177 	rss->rss_ind_tbl =
1178 		dma_alloc_coherent(ena_dev->dmadev, tbl_size,
1179 				   &rss->rss_ind_tbl_dma_addr, GFP_KERNEL);
1180 	if (unlikely(!rss->rss_ind_tbl))
1181 		goto mem_err1;
1182 
1183 	tbl_size = (1ULL << log_size) * sizeof(u16);
1184 	rss->host_rss_ind_tbl =
1185 		devm_kzalloc(ena_dev->dmadev, tbl_size, GFP_KERNEL);
1186 	if (unlikely(!rss->host_rss_ind_tbl))
1187 		goto mem_err2;
1188 
1189 	rss->tbl_log_size = log_size;
1190 
1191 	return 0;
1192 
1193 mem_err2:
1194 	tbl_size = (1ULL << log_size) *
1195 		sizeof(struct ena_admin_rss_ind_table_entry);
1196 
1197 	dma_free_coherent(ena_dev->dmadev, tbl_size, rss->rss_ind_tbl,
1198 			  rss->rss_ind_tbl_dma_addr);
1199 	rss->rss_ind_tbl = NULL;
1200 mem_err1:
1201 	rss->tbl_log_size = 0;
1202 	return -ENOMEM;
1203 }
1204 
1205 static void ena_com_indirect_table_destroy(struct ena_com_dev *ena_dev)
1206 {
1207 	struct ena_rss *rss = &ena_dev->rss;
1208 	size_t tbl_size = (1ULL << rss->tbl_log_size) *
1209 		sizeof(struct ena_admin_rss_ind_table_entry);
1210 
1211 	if (rss->rss_ind_tbl)
1212 		dma_free_coherent(ena_dev->dmadev, tbl_size, rss->rss_ind_tbl,
1213 				  rss->rss_ind_tbl_dma_addr);
1214 	rss->rss_ind_tbl = NULL;
1215 
1216 	if (rss->host_rss_ind_tbl)
1217 		devm_kfree(ena_dev->dmadev, rss->host_rss_ind_tbl);
1218 	rss->host_rss_ind_tbl = NULL;
1219 }
1220 
1221 static int ena_com_create_io_sq(struct ena_com_dev *ena_dev,
1222 				struct ena_com_io_sq *io_sq, u16 cq_idx)
1223 {
1224 	struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1225 	struct ena_admin_aq_create_sq_cmd create_cmd;
1226 	struct ena_admin_acq_create_sq_resp_desc cmd_completion;
1227 	u8 direction;
1228 	int ret;
1229 
1230 	memset(&create_cmd, 0x0, sizeof(create_cmd));
1231 
1232 	create_cmd.aq_common_descriptor.opcode = ENA_ADMIN_CREATE_SQ;
1233 
1234 	if (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
1235 		direction = ENA_ADMIN_SQ_DIRECTION_TX;
1236 	else
1237 		direction = ENA_ADMIN_SQ_DIRECTION_RX;
1238 
1239 	create_cmd.sq_identity |= (direction <<
1240 		ENA_ADMIN_AQ_CREATE_SQ_CMD_SQ_DIRECTION_SHIFT) &
1241 		ENA_ADMIN_AQ_CREATE_SQ_CMD_SQ_DIRECTION_MASK;
1242 
1243 	create_cmd.sq_caps_2 |= io_sq->mem_queue_type &
1244 		ENA_ADMIN_AQ_CREATE_SQ_CMD_PLACEMENT_POLICY_MASK;
1245 
1246 	create_cmd.sq_caps_2 |= (ENA_ADMIN_COMPLETION_POLICY_DESC <<
1247 		ENA_ADMIN_AQ_CREATE_SQ_CMD_COMPLETION_POLICY_SHIFT) &
1248 		ENA_ADMIN_AQ_CREATE_SQ_CMD_COMPLETION_POLICY_MASK;
1249 
1250 	create_cmd.sq_caps_3 |=
1251 		ENA_ADMIN_AQ_CREATE_SQ_CMD_IS_PHYSICALLY_CONTIGUOUS_MASK;
1252 
1253 	create_cmd.cq_idx = cq_idx;
1254 	create_cmd.sq_depth = io_sq->q_depth;
1255 
1256 	if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST) {
1257 		ret = ena_com_mem_addr_set(ena_dev,
1258 					   &create_cmd.sq_ba,
1259 					   io_sq->desc_addr.phys_addr);
1260 		if (unlikely(ret)) {
1261 			netdev_err(ena_dev->net_device,
1262 				   "Memory address set failed\n");
1263 			return ret;
1264 		}
1265 	}
1266 
1267 	ret = ena_com_execute_admin_command(admin_queue,
1268 					    (struct ena_admin_aq_entry *)&create_cmd,
1269 					    sizeof(create_cmd),
1270 					    (struct ena_admin_acq_entry *)&cmd_completion,
1271 					    sizeof(cmd_completion));
1272 	if (unlikely(ret)) {
1273 		netdev_err(ena_dev->net_device,
1274 			   "Failed to create IO SQ. error: %d\n", ret);
1275 		return ret;
1276 	}
1277 
1278 	io_sq->idx = cmd_completion.sq_idx;
1279 
1280 	io_sq->db_addr = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1281 		(uintptr_t)cmd_completion.sq_doorbell_offset);
1282 
1283 	if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
1284 		io_sq->header_addr = (u8 __iomem *)((uintptr_t)ena_dev->mem_bar
1285 				+ cmd_completion.llq_headers_offset);
1286 
1287 		io_sq->desc_addr.pbuf_dev_addr =
1288 			(u8 __iomem *)((uintptr_t)ena_dev->mem_bar +
1289 			cmd_completion.llq_descriptors_offset);
1290 	}
1291 
1292 	netdev_dbg(ena_dev->net_device, "Created sq[%u], depth[%u]\n",
1293 		   io_sq->idx, io_sq->q_depth);
1294 
1295 	return ret;
1296 }
1297 
1298 static int ena_com_ind_tbl_convert_to_device(struct ena_com_dev *ena_dev)
1299 {
1300 	struct ena_rss *rss = &ena_dev->rss;
1301 	struct ena_com_io_sq *io_sq;
1302 	u16 qid;
1303 	int i;
1304 
1305 	for (i = 0; i < 1 << rss->tbl_log_size; i++) {
1306 		qid = rss->host_rss_ind_tbl[i];
1307 		if (qid >= ENA_TOTAL_NUM_QUEUES)
1308 			return -EINVAL;
1309 
1310 		io_sq = &ena_dev->io_sq_queues[qid];
1311 
1312 		if (io_sq->direction != ENA_COM_IO_QUEUE_DIRECTION_RX)
1313 			return -EINVAL;
1314 
1315 		rss->rss_ind_tbl[i].cq_idx = io_sq->idx;
1316 	}
1317 
1318 	return 0;
1319 }
1320 
1321 static void ena_com_update_intr_delay_resolution(struct ena_com_dev *ena_dev,
1322 						 u16 intr_delay_resolution)
1323 {
1324 	u16 prev_intr_delay_resolution = ena_dev->intr_delay_resolution;
1325 
1326 	if (unlikely(!intr_delay_resolution)) {
1327 		netdev_err(ena_dev->net_device,
1328 			   "Illegal intr_delay_resolution provided. Going to use default 1 usec resolution\n");
1329 		intr_delay_resolution = ENA_DEFAULT_INTR_DELAY_RESOLUTION;
1330 	}
1331 
1332 	/* update Rx */
1333 	ena_dev->intr_moder_rx_interval =
1334 		ena_dev->intr_moder_rx_interval *
1335 		prev_intr_delay_resolution /
1336 		intr_delay_resolution;
1337 
1338 	/* update Tx */
1339 	ena_dev->intr_moder_tx_interval =
1340 		ena_dev->intr_moder_tx_interval *
1341 		prev_intr_delay_resolution /
1342 		intr_delay_resolution;
1343 
1344 	ena_dev->intr_delay_resolution = intr_delay_resolution;
1345 }
1346 
1347 /*****************************************************************************/
1348 /*******************************      API       ******************************/
1349 /*****************************************************************************/
1350 
1351 int ena_com_execute_admin_command(struct ena_com_admin_queue *admin_queue,
1352 				  struct ena_admin_aq_entry *cmd,
1353 				  size_t cmd_size,
1354 				  struct ena_admin_acq_entry *comp,
1355 				  size_t comp_size)
1356 {
1357 	struct ena_comp_ctx *comp_ctx;
1358 	int ret;
1359 
1360 	comp_ctx = ena_com_submit_admin_cmd(admin_queue, cmd, cmd_size,
1361 					    comp, comp_size);
1362 	if (IS_ERR(comp_ctx)) {
1363 		ret = PTR_ERR(comp_ctx);
1364 		if (ret == -ENODEV)
1365 			netdev_dbg(admin_queue->ena_dev->net_device,
1366 				   "Failed to submit command [%d]\n", ret);
1367 		else
1368 			netdev_err(admin_queue->ena_dev->net_device,
1369 				   "Failed to submit command [%d]\n", ret);
1370 
1371 		return ret;
1372 	}
1373 
1374 	ret = ena_com_wait_and_process_admin_cq(comp_ctx, admin_queue);
1375 	if (unlikely(ret)) {
1376 		if (admin_queue->running_state)
1377 			netdev_err(admin_queue->ena_dev->net_device,
1378 				   "Failed to process command. ret = %d\n", ret);
1379 		else
1380 			netdev_dbg(admin_queue->ena_dev->net_device,
1381 				   "Failed to process command. ret = %d\n", ret);
1382 	}
1383 	return ret;
1384 }
1385 
1386 int ena_com_create_io_cq(struct ena_com_dev *ena_dev,
1387 			 struct ena_com_io_cq *io_cq)
1388 {
1389 	struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1390 	struct ena_admin_aq_create_cq_cmd create_cmd;
1391 	struct ena_admin_acq_create_cq_resp_desc cmd_completion;
1392 	int ret;
1393 
1394 	memset(&create_cmd, 0x0, sizeof(create_cmd));
1395 
1396 	create_cmd.aq_common_descriptor.opcode = ENA_ADMIN_CREATE_CQ;
1397 
1398 	create_cmd.cq_caps_2 |= (io_cq->cdesc_entry_size_in_bytes / 4) &
1399 		ENA_ADMIN_AQ_CREATE_CQ_CMD_CQ_ENTRY_SIZE_WORDS_MASK;
1400 	create_cmd.cq_caps_1 |=
1401 		ENA_ADMIN_AQ_CREATE_CQ_CMD_INTERRUPT_MODE_ENABLED_MASK;
1402 
1403 	create_cmd.msix_vector = io_cq->msix_vector;
1404 	create_cmd.cq_depth = io_cq->q_depth;
1405 
1406 	ret = ena_com_mem_addr_set(ena_dev,
1407 				   &create_cmd.cq_ba,
1408 				   io_cq->cdesc_addr.phys_addr);
1409 	if (unlikely(ret)) {
1410 		netdev_err(ena_dev->net_device, "Memory address set failed\n");
1411 		return ret;
1412 	}
1413 
1414 	ret = ena_com_execute_admin_command(admin_queue,
1415 					    (struct ena_admin_aq_entry *)&create_cmd,
1416 					    sizeof(create_cmd),
1417 					    (struct ena_admin_acq_entry *)&cmd_completion,
1418 					    sizeof(cmd_completion));
1419 	if (unlikely(ret)) {
1420 		netdev_err(ena_dev->net_device,
1421 			   "Failed to create IO CQ. error: %d\n", ret);
1422 		return ret;
1423 	}
1424 
1425 	io_cq->idx = cmd_completion.cq_idx;
1426 
1427 	io_cq->unmask_reg = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1428 		cmd_completion.cq_interrupt_unmask_register_offset);
1429 
1430 	if (cmd_completion.cq_head_db_register_offset)
1431 		io_cq->cq_head_db_reg =
1432 			(u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1433 			cmd_completion.cq_head_db_register_offset);
1434 
1435 	if (cmd_completion.numa_node_register_offset)
1436 		io_cq->numa_node_cfg_reg =
1437 			(u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1438 			cmd_completion.numa_node_register_offset);
1439 
1440 	netdev_dbg(ena_dev->net_device, "Created cq[%u], depth[%u]\n",
1441 		   io_cq->idx, io_cq->q_depth);
1442 
1443 	return ret;
1444 }
1445 
1446 int ena_com_get_io_handlers(struct ena_com_dev *ena_dev, u16 qid,
1447 			    struct ena_com_io_sq **io_sq,
1448 			    struct ena_com_io_cq **io_cq)
1449 {
1450 	if (qid >= ENA_TOTAL_NUM_QUEUES) {
1451 		netdev_err(ena_dev->net_device,
1452 			   "Invalid queue number %d but the max is %d\n", qid,
1453 			   ENA_TOTAL_NUM_QUEUES);
1454 		return -EINVAL;
1455 	}
1456 
1457 	*io_sq = &ena_dev->io_sq_queues[qid];
1458 	*io_cq = &ena_dev->io_cq_queues[qid];
1459 
1460 	return 0;
1461 }
1462 
1463 void ena_com_abort_admin_commands(struct ena_com_dev *ena_dev)
1464 {
1465 	struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1466 	struct ena_comp_ctx *comp_ctx;
1467 	u16 i;
1468 
1469 	if (!admin_queue->comp_ctx)
1470 		return;
1471 
1472 	for (i = 0; i < admin_queue->q_depth; i++) {
1473 		comp_ctx = get_comp_ctxt(admin_queue, i, false);
1474 		if (unlikely(!comp_ctx))
1475 			break;
1476 
1477 		comp_ctx->status = ENA_CMD_ABORTED;
1478 
1479 		complete(&comp_ctx->wait_event);
1480 	}
1481 }
1482 
1483 void ena_com_wait_for_abort_completion(struct ena_com_dev *ena_dev)
1484 {
1485 	struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1486 	unsigned long flags = 0;
1487 	u32 exp = 0;
1488 
1489 	spin_lock_irqsave(&admin_queue->q_lock, flags);
1490 	while (atomic_read(&admin_queue->outstanding_cmds) != 0) {
1491 		spin_unlock_irqrestore(&admin_queue->q_lock, flags);
1492 		ena_delay_exponential_backoff_us(exp++,
1493 						 ena_dev->ena_min_poll_delay_us);
1494 		spin_lock_irqsave(&admin_queue->q_lock, flags);
1495 	}
1496 	spin_unlock_irqrestore(&admin_queue->q_lock, flags);
1497 }
1498 
1499 int ena_com_destroy_io_cq(struct ena_com_dev *ena_dev,
1500 			  struct ena_com_io_cq *io_cq)
1501 {
1502 	struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1503 	struct ena_admin_aq_destroy_cq_cmd destroy_cmd;
1504 	struct ena_admin_acq_destroy_cq_resp_desc destroy_resp;
1505 	int ret;
1506 
1507 	memset(&destroy_cmd, 0x0, sizeof(destroy_cmd));
1508 
1509 	destroy_cmd.cq_idx = io_cq->idx;
1510 	destroy_cmd.aq_common_descriptor.opcode = ENA_ADMIN_DESTROY_CQ;
1511 
1512 	ret = ena_com_execute_admin_command(admin_queue,
1513 					    (struct ena_admin_aq_entry *)&destroy_cmd,
1514 					    sizeof(destroy_cmd),
1515 					    (struct ena_admin_acq_entry *)&destroy_resp,
1516 					    sizeof(destroy_resp));
1517 
1518 	if (unlikely(ret && (ret != -ENODEV)))
1519 		netdev_err(ena_dev->net_device,
1520 			   "Failed to destroy IO CQ. error: %d\n", ret);
1521 
1522 	return ret;
1523 }
1524 
1525 bool ena_com_get_admin_running_state(struct ena_com_dev *ena_dev)
1526 {
1527 	return ena_dev->admin_queue.running_state;
1528 }
1529 
1530 void ena_com_set_admin_running_state(struct ena_com_dev *ena_dev, bool state)
1531 {
1532 	struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1533 	unsigned long flags = 0;
1534 
1535 	spin_lock_irqsave(&admin_queue->q_lock, flags);
1536 	ena_dev->admin_queue.running_state = state;
1537 	spin_unlock_irqrestore(&admin_queue->q_lock, flags);
1538 }
1539 
1540 void ena_com_admin_aenq_enable(struct ena_com_dev *ena_dev)
1541 {
1542 	u16 depth = ena_dev->aenq.q_depth;
1543 
1544 	WARN(ena_dev->aenq.head != depth, "Invalid AENQ state\n");
1545 
1546 	/* Init head_db to mark that all entries in the queue
1547 	 * are initially available
1548 	 */
1549 	writel(depth, ena_dev->reg_bar + ENA_REGS_AENQ_HEAD_DB_OFF);
1550 }
1551 
1552 int ena_com_set_aenq_config(struct ena_com_dev *ena_dev, u32 groups_flag)
1553 {
1554 	struct ena_com_admin_queue *admin_queue;
1555 	struct ena_admin_set_feat_cmd cmd;
1556 	struct ena_admin_set_feat_resp resp;
1557 	struct ena_admin_get_feat_resp get_resp;
1558 	int ret;
1559 
1560 	ret = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_AENQ_CONFIG, 0);
1561 	if (ret) {
1562 		dev_info(ena_dev->dmadev, "Can't get aenq configuration\n");
1563 		return ret;
1564 	}
1565 
1566 	if ((get_resp.u.aenq.supported_groups & groups_flag) != groups_flag) {
1567 		netdev_warn(ena_dev->net_device,
1568 			    "Trying to set unsupported aenq events. supported flag: 0x%x asked flag: 0x%x\n",
1569 			    get_resp.u.aenq.supported_groups, groups_flag);
1570 		return -EOPNOTSUPP;
1571 	}
1572 
1573 	memset(&cmd, 0x0, sizeof(cmd));
1574 	admin_queue = &ena_dev->admin_queue;
1575 
1576 	cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
1577 	cmd.aq_common_descriptor.flags = 0;
1578 	cmd.feat_common.feature_id = ENA_ADMIN_AENQ_CONFIG;
1579 	cmd.u.aenq.enabled_groups = groups_flag;
1580 
1581 	ret = ena_com_execute_admin_command(admin_queue,
1582 					    (struct ena_admin_aq_entry *)&cmd,
1583 					    sizeof(cmd),
1584 					    (struct ena_admin_acq_entry *)&resp,
1585 					    sizeof(resp));
1586 
1587 	if (unlikely(ret))
1588 		netdev_err(ena_dev->net_device,
1589 			   "Failed to config AENQ ret: %d\n", ret);
1590 
1591 	return ret;
1592 }
1593 
1594 int ena_com_get_dma_width(struct ena_com_dev *ena_dev)
1595 {
1596 	u32 caps = ena_com_reg_bar_read32(ena_dev, ENA_REGS_CAPS_OFF);
1597 	u32 width;
1598 
1599 	if (unlikely(caps == ENA_MMIO_READ_TIMEOUT)) {
1600 		netdev_err(ena_dev->net_device, "Reg read timeout occurred\n");
1601 		return -ETIME;
1602 	}
1603 
1604 	width = (caps & ENA_REGS_CAPS_DMA_ADDR_WIDTH_MASK) >>
1605 		ENA_REGS_CAPS_DMA_ADDR_WIDTH_SHIFT;
1606 
1607 	netdev_dbg(ena_dev->net_device, "ENA dma width: %d\n", width);
1608 
1609 	if ((width < 32) || width > ENA_MAX_PHYS_ADDR_SIZE_BITS) {
1610 		netdev_err(ena_dev->net_device, "DMA width illegal value: %d\n",
1611 			   width);
1612 		return -EINVAL;
1613 	}
1614 
1615 	ena_dev->dma_addr_bits = width;
1616 
1617 	return width;
1618 }
1619 
1620 int ena_com_validate_version(struct ena_com_dev *ena_dev)
1621 {
1622 	u32 ver;
1623 	u32 ctrl_ver;
1624 	u32 ctrl_ver_masked;
1625 
1626 	/* Make sure the ENA version and the controller version are at least
1627 	 * as the driver expects
1628 	 */
1629 	ver = ena_com_reg_bar_read32(ena_dev, ENA_REGS_VERSION_OFF);
1630 	ctrl_ver = ena_com_reg_bar_read32(ena_dev,
1631 					  ENA_REGS_CONTROLLER_VERSION_OFF);
1632 
1633 	if (unlikely((ver == ENA_MMIO_READ_TIMEOUT) ||
1634 		     (ctrl_ver == ENA_MMIO_READ_TIMEOUT))) {
1635 		netdev_err(ena_dev->net_device, "Reg read timeout occurred\n");
1636 		return -ETIME;
1637 	}
1638 
1639 	dev_info(ena_dev->dmadev, "ENA device version: %d.%d\n",
1640 		 (ver & ENA_REGS_VERSION_MAJOR_VERSION_MASK) >>
1641 			 ENA_REGS_VERSION_MAJOR_VERSION_SHIFT,
1642 		 ver & ENA_REGS_VERSION_MINOR_VERSION_MASK);
1643 
1644 	dev_info(ena_dev->dmadev,
1645 		 "ENA controller version: %d.%d.%d implementation version %d\n",
1646 		 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_MASK) >>
1647 			 ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_SHIFT,
1648 		 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_MASK) >>
1649 			 ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_SHIFT,
1650 		 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_SUBMINOR_VERSION_MASK),
1651 		 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_IMPL_ID_MASK) >>
1652 			 ENA_REGS_CONTROLLER_VERSION_IMPL_ID_SHIFT);
1653 
1654 	ctrl_ver_masked =
1655 		(ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_MASK) |
1656 		(ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_MASK) |
1657 		(ctrl_ver & ENA_REGS_CONTROLLER_VERSION_SUBMINOR_VERSION_MASK);
1658 
1659 	/* Validate the ctrl version without the implementation ID */
1660 	if (ctrl_ver_masked < MIN_ENA_CTRL_VER) {
1661 		netdev_err(ena_dev->net_device,
1662 			   "ENA ctrl version is lower than the minimal ctrl version the driver supports\n");
1663 		return -1;
1664 	}
1665 
1666 	return 0;
1667 }
1668 
1669 static void
1670 ena_com_free_ena_admin_queue_comp_ctx(struct ena_com_dev *ena_dev,
1671 				      struct ena_com_admin_queue *admin_queue)
1672 
1673 {
1674 	if (!admin_queue->comp_ctx)
1675 		return;
1676 
1677 	devm_kfree(ena_dev->dmadev, admin_queue->comp_ctx);
1678 
1679 	admin_queue->comp_ctx = NULL;
1680 }
1681 
1682 void ena_com_admin_destroy(struct ena_com_dev *ena_dev)
1683 {
1684 	struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1685 	struct ena_com_admin_cq *cq = &admin_queue->cq;
1686 	struct ena_com_admin_sq *sq = &admin_queue->sq;
1687 	struct ena_com_aenq *aenq = &ena_dev->aenq;
1688 	u16 size;
1689 
1690 	ena_com_free_ena_admin_queue_comp_ctx(ena_dev, admin_queue);
1691 
1692 	size = ADMIN_SQ_SIZE(admin_queue->q_depth);
1693 	if (sq->entries)
1694 		dma_free_coherent(ena_dev->dmadev, size, sq->entries,
1695 				  sq->dma_addr);
1696 	sq->entries = NULL;
1697 
1698 	size = ADMIN_CQ_SIZE(admin_queue->q_depth);
1699 	if (cq->entries)
1700 		dma_free_coherent(ena_dev->dmadev, size, cq->entries,
1701 				  cq->dma_addr);
1702 	cq->entries = NULL;
1703 
1704 	size = ADMIN_AENQ_SIZE(aenq->q_depth);
1705 	if (ena_dev->aenq.entries)
1706 		dma_free_coherent(ena_dev->dmadev, size, aenq->entries,
1707 				  aenq->dma_addr);
1708 	aenq->entries = NULL;
1709 }
1710 
1711 void ena_com_set_admin_polling_mode(struct ena_com_dev *ena_dev, bool polling)
1712 {
1713 	u32 mask_value = 0;
1714 
1715 	if (polling)
1716 		mask_value = ENA_REGS_ADMIN_INTR_MASK;
1717 
1718 	writel(mask_value, ena_dev->reg_bar + ENA_REGS_INTR_MASK_OFF);
1719 	ena_dev->admin_queue.polling = polling;
1720 }
1721 
1722 void ena_com_set_admin_auto_polling_mode(struct ena_com_dev *ena_dev,
1723 					 bool polling)
1724 {
1725 	ena_dev->admin_queue.auto_polling = polling;
1726 }
1727 
1728 int ena_com_mmio_reg_read_request_init(struct ena_com_dev *ena_dev)
1729 {
1730 	struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1731 
1732 	spin_lock_init(&mmio_read->lock);
1733 	mmio_read->read_resp =
1734 		dma_alloc_coherent(ena_dev->dmadev,
1735 				   sizeof(*mmio_read->read_resp),
1736 				   &mmio_read->read_resp_dma_addr, GFP_KERNEL);
1737 	if (unlikely(!mmio_read->read_resp))
1738 		goto err;
1739 
1740 	ena_com_mmio_reg_read_request_write_dev_addr(ena_dev);
1741 
1742 	mmio_read->read_resp->req_id = 0x0;
1743 	mmio_read->seq_num = 0x0;
1744 	mmio_read->readless_supported = true;
1745 
1746 	return 0;
1747 
1748 err:
1749 
1750 	return -ENOMEM;
1751 }
1752 
1753 void ena_com_set_mmio_read_mode(struct ena_com_dev *ena_dev, bool readless_supported)
1754 {
1755 	struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1756 
1757 	mmio_read->readless_supported = readless_supported;
1758 }
1759 
1760 void ena_com_mmio_reg_read_request_destroy(struct ena_com_dev *ena_dev)
1761 {
1762 	struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1763 
1764 	writel(0x0, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_LO_OFF);
1765 	writel(0x0, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_HI_OFF);
1766 
1767 	dma_free_coherent(ena_dev->dmadev, sizeof(*mmio_read->read_resp),
1768 			  mmio_read->read_resp, mmio_read->read_resp_dma_addr);
1769 
1770 	mmio_read->read_resp = NULL;
1771 }
1772 
1773 void ena_com_mmio_reg_read_request_write_dev_addr(struct ena_com_dev *ena_dev)
1774 {
1775 	struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1776 	u32 addr_low, addr_high;
1777 
1778 	addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(mmio_read->read_resp_dma_addr);
1779 	addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(mmio_read->read_resp_dma_addr);
1780 
1781 	writel(addr_low, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_LO_OFF);
1782 	writel(addr_high, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_HI_OFF);
1783 }
1784 
1785 int ena_com_admin_init(struct ena_com_dev *ena_dev,
1786 		       struct ena_aenq_handlers *aenq_handlers)
1787 {
1788 	struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1789 	u32 aq_caps, acq_caps, dev_sts, addr_low, addr_high;
1790 	int ret;
1791 
1792 	dev_sts = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
1793 
1794 	if (unlikely(dev_sts == ENA_MMIO_READ_TIMEOUT)) {
1795 		netdev_err(ena_dev->net_device, "Reg read timeout occurred\n");
1796 		return -ETIME;
1797 	}
1798 
1799 	if (!(dev_sts & ENA_REGS_DEV_STS_READY_MASK)) {
1800 		netdev_err(ena_dev->net_device,
1801 			   "Device isn't ready, abort com init\n");
1802 		return -ENODEV;
1803 	}
1804 
1805 	admin_queue->q_depth = ENA_ADMIN_QUEUE_DEPTH;
1806 
1807 	admin_queue->q_dmadev = ena_dev->dmadev;
1808 	admin_queue->polling = false;
1809 	admin_queue->curr_cmd_id = 0;
1810 
1811 	atomic_set(&admin_queue->outstanding_cmds, 0);
1812 
1813 	spin_lock_init(&admin_queue->q_lock);
1814 
1815 	ret = ena_com_init_comp_ctxt(admin_queue);
1816 	if (ret)
1817 		goto error;
1818 
1819 	ret = ena_com_admin_init_sq(admin_queue);
1820 	if (ret)
1821 		goto error;
1822 
1823 	ret = ena_com_admin_init_cq(admin_queue);
1824 	if (ret)
1825 		goto error;
1826 
1827 	admin_queue->sq.db_addr = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1828 		ENA_REGS_AQ_DB_OFF);
1829 
1830 	addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(admin_queue->sq.dma_addr);
1831 	addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(admin_queue->sq.dma_addr);
1832 
1833 	writel(addr_low, ena_dev->reg_bar + ENA_REGS_AQ_BASE_LO_OFF);
1834 	writel(addr_high, ena_dev->reg_bar + ENA_REGS_AQ_BASE_HI_OFF);
1835 
1836 	addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(admin_queue->cq.dma_addr);
1837 	addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(admin_queue->cq.dma_addr);
1838 
1839 	writel(addr_low, ena_dev->reg_bar + ENA_REGS_ACQ_BASE_LO_OFF);
1840 	writel(addr_high, ena_dev->reg_bar + ENA_REGS_ACQ_BASE_HI_OFF);
1841 
1842 	aq_caps = 0;
1843 	aq_caps |= admin_queue->q_depth & ENA_REGS_AQ_CAPS_AQ_DEPTH_MASK;
1844 	aq_caps |= (sizeof(struct ena_admin_aq_entry) <<
1845 			ENA_REGS_AQ_CAPS_AQ_ENTRY_SIZE_SHIFT) &
1846 			ENA_REGS_AQ_CAPS_AQ_ENTRY_SIZE_MASK;
1847 
1848 	acq_caps = 0;
1849 	acq_caps |= admin_queue->q_depth & ENA_REGS_ACQ_CAPS_ACQ_DEPTH_MASK;
1850 	acq_caps |= (sizeof(struct ena_admin_acq_entry) <<
1851 		ENA_REGS_ACQ_CAPS_ACQ_ENTRY_SIZE_SHIFT) &
1852 		ENA_REGS_ACQ_CAPS_ACQ_ENTRY_SIZE_MASK;
1853 
1854 	writel(aq_caps, ena_dev->reg_bar + ENA_REGS_AQ_CAPS_OFF);
1855 	writel(acq_caps, ena_dev->reg_bar + ENA_REGS_ACQ_CAPS_OFF);
1856 	ret = ena_com_admin_init_aenq(ena_dev, aenq_handlers);
1857 	if (ret)
1858 		goto error;
1859 
1860 	admin_queue->ena_dev = ena_dev;
1861 	admin_queue->running_state = true;
1862 
1863 	return 0;
1864 error:
1865 	ena_com_admin_destroy(ena_dev);
1866 
1867 	return ret;
1868 }
1869 
1870 int ena_com_create_io_queue(struct ena_com_dev *ena_dev,
1871 			    struct ena_com_create_io_ctx *ctx)
1872 {
1873 	struct ena_com_io_sq *io_sq;
1874 	struct ena_com_io_cq *io_cq;
1875 	int ret;
1876 
1877 	if (ctx->qid >= ENA_TOTAL_NUM_QUEUES) {
1878 		netdev_err(ena_dev->net_device,
1879 			   "Qid (%d) is bigger than max num of queues (%d)\n",
1880 			   ctx->qid, ENA_TOTAL_NUM_QUEUES);
1881 		return -EINVAL;
1882 	}
1883 
1884 	io_sq = &ena_dev->io_sq_queues[ctx->qid];
1885 	io_cq = &ena_dev->io_cq_queues[ctx->qid];
1886 
1887 	memset(io_sq, 0x0, sizeof(*io_sq));
1888 	memset(io_cq, 0x0, sizeof(*io_cq));
1889 
1890 	/* Init CQ */
1891 	io_cq->q_depth = ctx->queue_size;
1892 	io_cq->direction = ctx->direction;
1893 	io_cq->qid = ctx->qid;
1894 
1895 	io_cq->msix_vector = ctx->msix_vector;
1896 
1897 	io_sq->q_depth = ctx->queue_size;
1898 	io_sq->direction = ctx->direction;
1899 	io_sq->qid = ctx->qid;
1900 
1901 	io_sq->mem_queue_type = ctx->mem_queue_type;
1902 
1903 	if (ctx->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
1904 		/* header length is limited to 8 bits */
1905 		io_sq->tx_max_header_size =
1906 			min_t(u32, ena_dev->tx_max_header_size, SZ_256);
1907 
1908 	ret = ena_com_init_io_sq(ena_dev, ctx, io_sq);
1909 	if (ret)
1910 		goto error;
1911 	ret = ena_com_init_io_cq(ena_dev, ctx, io_cq);
1912 	if (ret)
1913 		goto error;
1914 
1915 	ret = ena_com_create_io_cq(ena_dev, io_cq);
1916 	if (ret)
1917 		goto error;
1918 
1919 	ret = ena_com_create_io_sq(ena_dev, io_sq, io_cq->idx);
1920 	if (ret)
1921 		goto destroy_io_cq;
1922 
1923 	return 0;
1924 
1925 destroy_io_cq:
1926 	ena_com_destroy_io_cq(ena_dev, io_cq);
1927 error:
1928 	ena_com_io_queue_free(ena_dev, io_sq, io_cq);
1929 	return ret;
1930 }
1931 
1932 void ena_com_destroy_io_queue(struct ena_com_dev *ena_dev, u16 qid)
1933 {
1934 	struct ena_com_io_sq *io_sq;
1935 	struct ena_com_io_cq *io_cq;
1936 
1937 	if (qid >= ENA_TOTAL_NUM_QUEUES) {
1938 		netdev_err(ena_dev->net_device,
1939 			   "Qid (%d) is bigger than max num of queues (%d)\n",
1940 			   qid, ENA_TOTAL_NUM_QUEUES);
1941 		return;
1942 	}
1943 
1944 	io_sq = &ena_dev->io_sq_queues[qid];
1945 	io_cq = &ena_dev->io_cq_queues[qid];
1946 
1947 	ena_com_destroy_io_sq(ena_dev, io_sq);
1948 	ena_com_destroy_io_cq(ena_dev, io_cq);
1949 
1950 	ena_com_io_queue_free(ena_dev, io_sq, io_cq);
1951 }
1952 
1953 int ena_com_get_link_params(struct ena_com_dev *ena_dev,
1954 			    struct ena_admin_get_feat_resp *resp)
1955 {
1956 	return ena_com_get_feature(ena_dev, resp, ENA_ADMIN_LINK_CONFIG, 0);
1957 }
1958 
1959 int ena_com_get_dev_attr_feat(struct ena_com_dev *ena_dev,
1960 			      struct ena_com_dev_get_features_ctx *get_feat_ctx)
1961 {
1962 	struct ena_admin_get_feat_resp get_resp;
1963 	int rc;
1964 
1965 	rc = ena_com_get_feature(ena_dev, &get_resp,
1966 				 ENA_ADMIN_DEVICE_ATTRIBUTES, 0);
1967 	if (rc)
1968 		return rc;
1969 
1970 	memcpy(&get_feat_ctx->dev_attr, &get_resp.u.dev_attr,
1971 	       sizeof(get_resp.u.dev_attr));
1972 
1973 	ena_dev->supported_features = get_resp.u.dev_attr.supported_features;
1974 
1975 	if (ena_dev->supported_features & BIT(ENA_ADMIN_MAX_QUEUES_EXT)) {
1976 		rc = ena_com_get_feature(ena_dev, &get_resp,
1977 					 ENA_ADMIN_MAX_QUEUES_EXT,
1978 					 ENA_FEATURE_MAX_QUEUE_EXT_VER);
1979 		if (rc)
1980 			return rc;
1981 
1982 		if (get_resp.u.max_queue_ext.version != ENA_FEATURE_MAX_QUEUE_EXT_VER)
1983 			return -EINVAL;
1984 
1985 		memcpy(&get_feat_ctx->max_queue_ext, &get_resp.u.max_queue_ext,
1986 		       sizeof(get_resp.u.max_queue_ext));
1987 		ena_dev->tx_max_header_size =
1988 			get_resp.u.max_queue_ext.max_queue_ext.max_tx_header_size;
1989 	} else {
1990 		rc = ena_com_get_feature(ena_dev, &get_resp,
1991 					 ENA_ADMIN_MAX_QUEUES_NUM, 0);
1992 		memcpy(&get_feat_ctx->max_queues, &get_resp.u.max_queue,
1993 		       sizeof(get_resp.u.max_queue));
1994 		ena_dev->tx_max_header_size =
1995 			get_resp.u.max_queue.max_header_size;
1996 
1997 		if (rc)
1998 			return rc;
1999 	}
2000 
2001 	rc = ena_com_get_feature(ena_dev, &get_resp,
2002 				 ENA_ADMIN_AENQ_CONFIG, 0);
2003 	if (rc)
2004 		return rc;
2005 
2006 	memcpy(&get_feat_ctx->aenq, &get_resp.u.aenq,
2007 	       sizeof(get_resp.u.aenq));
2008 
2009 	rc = ena_com_get_feature(ena_dev, &get_resp,
2010 				 ENA_ADMIN_STATELESS_OFFLOAD_CONFIG, 0);
2011 	if (rc)
2012 		return rc;
2013 
2014 	memcpy(&get_feat_ctx->offload, &get_resp.u.offload,
2015 	       sizeof(get_resp.u.offload));
2016 
2017 	/* Driver hints isn't mandatory admin command. So in case the
2018 	 * command isn't supported set driver hints to 0
2019 	 */
2020 	rc = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_HW_HINTS, 0);
2021 
2022 	if (!rc)
2023 		memcpy(&get_feat_ctx->hw_hints, &get_resp.u.hw_hints,
2024 		       sizeof(get_resp.u.hw_hints));
2025 	else if (rc == -EOPNOTSUPP)
2026 		memset(&get_feat_ctx->hw_hints, 0x0,
2027 		       sizeof(get_feat_ctx->hw_hints));
2028 	else
2029 		return rc;
2030 
2031 	rc = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_LLQ, 0);
2032 	if (!rc)
2033 		memcpy(&get_feat_ctx->llq, &get_resp.u.llq,
2034 		       sizeof(get_resp.u.llq));
2035 	else if (rc == -EOPNOTSUPP)
2036 		memset(&get_feat_ctx->llq, 0x0, sizeof(get_feat_ctx->llq));
2037 	else
2038 		return rc;
2039 
2040 	return 0;
2041 }
2042 
2043 void ena_com_admin_q_comp_intr_handler(struct ena_com_dev *ena_dev)
2044 {
2045 	ena_com_handle_admin_completion(&ena_dev->admin_queue);
2046 }
2047 
2048 /* ena_handle_specific_aenq_event:
2049  * return the handler that is relevant to the specific event group
2050  */
2051 static ena_aenq_handler ena_com_get_specific_aenq_cb(struct ena_com_dev *ena_dev,
2052 						     u16 group)
2053 {
2054 	struct ena_aenq_handlers *aenq_handlers = ena_dev->aenq.aenq_handlers;
2055 
2056 	if ((group < ENA_MAX_HANDLERS) && aenq_handlers->handlers[group])
2057 		return aenq_handlers->handlers[group];
2058 
2059 	return aenq_handlers->unimplemented_handler;
2060 }
2061 
2062 /* ena_aenq_intr_handler:
2063  * handles the aenq incoming events.
2064  * pop events from the queue and apply the specific handler
2065  */
2066 void ena_com_aenq_intr_handler(struct ena_com_dev *ena_dev, void *data)
2067 {
2068 	struct ena_admin_aenq_entry *aenq_e;
2069 	struct ena_admin_aenq_common_desc *aenq_common;
2070 	struct ena_com_aenq *aenq  = &ena_dev->aenq;
2071 	u64 timestamp;
2072 	ena_aenq_handler handler_cb;
2073 	u16 masked_head, processed = 0;
2074 	u8 phase;
2075 
2076 	masked_head = aenq->head & (aenq->q_depth - 1);
2077 	phase = aenq->phase;
2078 	aenq_e = &aenq->entries[masked_head]; /* Get first entry */
2079 	aenq_common = &aenq_e->aenq_common_desc;
2080 
2081 	/* Go over all the events */
2082 	while ((READ_ONCE(aenq_common->flags) &
2083 		ENA_ADMIN_AENQ_COMMON_DESC_PHASE_MASK) == phase) {
2084 		/* Make sure the phase bit (ownership) is as expected before
2085 		 * reading the rest of the descriptor.
2086 		 */
2087 		dma_rmb();
2088 
2089 		timestamp = (u64)aenq_common->timestamp_low |
2090 			((u64)aenq_common->timestamp_high << 32);
2091 
2092 		netdev_dbg(ena_dev->net_device,
2093 			   "AENQ! Group[%x] Syndrome[%x] timestamp: [%llus]\n",
2094 			   aenq_common->group, aenq_common->syndrome, timestamp);
2095 
2096 		/* Handle specific event*/
2097 		handler_cb = ena_com_get_specific_aenq_cb(ena_dev,
2098 							  aenq_common->group);
2099 		handler_cb(data, aenq_e); /* call the actual event handler*/
2100 
2101 		/* Get next event entry */
2102 		masked_head++;
2103 		processed++;
2104 
2105 		if (unlikely(masked_head == aenq->q_depth)) {
2106 			masked_head = 0;
2107 			phase = !phase;
2108 		}
2109 		aenq_e = &aenq->entries[masked_head];
2110 		aenq_common = &aenq_e->aenq_common_desc;
2111 	}
2112 
2113 	aenq->head += processed;
2114 	aenq->phase = phase;
2115 
2116 	/* Don't update aenq doorbell if there weren't any processed events */
2117 	if (!processed)
2118 		return;
2119 
2120 	/* write the aenq doorbell after all AENQ descriptors were read */
2121 	mb();
2122 	writel_relaxed((u32)aenq->head,
2123 		       ena_dev->reg_bar + ENA_REGS_AENQ_HEAD_DB_OFF);
2124 }
2125 
2126 int ena_com_dev_reset(struct ena_com_dev *ena_dev,
2127 		      enum ena_regs_reset_reason_types reset_reason)
2128 {
2129 	u32 stat, timeout, cap, reset_val;
2130 	int rc;
2131 
2132 	stat = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
2133 	cap = ena_com_reg_bar_read32(ena_dev, ENA_REGS_CAPS_OFF);
2134 
2135 	if (unlikely((stat == ENA_MMIO_READ_TIMEOUT) ||
2136 		     (cap == ENA_MMIO_READ_TIMEOUT))) {
2137 		netdev_err(ena_dev->net_device, "Reg read32 timeout occurred\n");
2138 		return -ETIME;
2139 	}
2140 
2141 	if ((stat & ENA_REGS_DEV_STS_READY_MASK) == 0) {
2142 		netdev_err(ena_dev->net_device,
2143 			   "Device isn't ready, can't reset device\n");
2144 		return -EINVAL;
2145 	}
2146 
2147 	timeout = (cap & ENA_REGS_CAPS_RESET_TIMEOUT_MASK) >>
2148 			ENA_REGS_CAPS_RESET_TIMEOUT_SHIFT;
2149 	if (timeout == 0) {
2150 		netdev_err(ena_dev->net_device, "Invalid timeout value\n");
2151 		return -EINVAL;
2152 	}
2153 
2154 	/* start reset */
2155 	reset_val = ENA_REGS_DEV_CTL_DEV_RESET_MASK;
2156 	reset_val |= (reset_reason << ENA_REGS_DEV_CTL_RESET_REASON_SHIFT) &
2157 		     ENA_REGS_DEV_CTL_RESET_REASON_MASK;
2158 	writel(reset_val, ena_dev->reg_bar + ENA_REGS_DEV_CTL_OFF);
2159 
2160 	/* Write again the MMIO read request address */
2161 	ena_com_mmio_reg_read_request_write_dev_addr(ena_dev);
2162 
2163 	rc = wait_for_reset_state(ena_dev, timeout,
2164 				  ENA_REGS_DEV_STS_RESET_IN_PROGRESS_MASK);
2165 	if (rc != 0) {
2166 		netdev_err(ena_dev->net_device,
2167 			   "Reset indication didn't turn on\n");
2168 		return rc;
2169 	}
2170 
2171 	/* reset done */
2172 	writel(0, ena_dev->reg_bar + ENA_REGS_DEV_CTL_OFF);
2173 	rc = wait_for_reset_state(ena_dev, timeout, 0);
2174 	if (rc != 0) {
2175 		netdev_err(ena_dev->net_device,
2176 			   "Reset indication didn't turn off\n");
2177 		return rc;
2178 	}
2179 
2180 	timeout = (cap & ENA_REGS_CAPS_ADMIN_CMD_TO_MASK) >>
2181 		ENA_REGS_CAPS_ADMIN_CMD_TO_SHIFT;
2182 	if (timeout)
2183 		/* the resolution of timeout reg is 100ms */
2184 		ena_dev->admin_queue.completion_timeout = timeout * 100000;
2185 	else
2186 		ena_dev->admin_queue.completion_timeout = ADMIN_CMD_TIMEOUT_US;
2187 
2188 	return 0;
2189 }
2190 
2191 static int ena_get_dev_stats(struct ena_com_dev *ena_dev,
2192 			     struct ena_com_stats_ctx *ctx,
2193 			     enum ena_admin_get_stats_type type)
2194 {
2195 	struct ena_admin_aq_get_stats_cmd *get_cmd = &ctx->get_cmd;
2196 	struct ena_admin_acq_get_stats_resp *get_resp = &ctx->get_resp;
2197 	struct ena_com_admin_queue *admin_queue;
2198 	int ret;
2199 
2200 	admin_queue = &ena_dev->admin_queue;
2201 
2202 	get_cmd->aq_common_descriptor.opcode = ENA_ADMIN_GET_STATS;
2203 	get_cmd->aq_common_descriptor.flags = 0;
2204 	get_cmd->type = type;
2205 
2206 	ret =  ena_com_execute_admin_command(admin_queue,
2207 					     (struct ena_admin_aq_entry *)get_cmd,
2208 					     sizeof(*get_cmd),
2209 					     (struct ena_admin_acq_entry *)get_resp,
2210 					     sizeof(*get_resp));
2211 
2212 	if (unlikely(ret))
2213 		netdev_err(ena_dev->net_device,
2214 			   "Failed to get stats. error: %d\n", ret);
2215 
2216 	return ret;
2217 }
2218 
2219 int ena_com_get_eni_stats(struct ena_com_dev *ena_dev,
2220 			  struct ena_admin_eni_stats *stats)
2221 {
2222 	struct ena_com_stats_ctx ctx;
2223 	int ret;
2224 
2225 	memset(&ctx, 0x0, sizeof(ctx));
2226 	ret = ena_get_dev_stats(ena_dev, &ctx, ENA_ADMIN_GET_STATS_TYPE_ENI);
2227 	if (likely(ret == 0))
2228 		memcpy(stats, &ctx.get_resp.u.eni_stats,
2229 		       sizeof(ctx.get_resp.u.eni_stats));
2230 
2231 	return ret;
2232 }
2233 
2234 int ena_com_get_dev_basic_stats(struct ena_com_dev *ena_dev,
2235 				struct ena_admin_basic_stats *stats)
2236 {
2237 	struct ena_com_stats_ctx ctx;
2238 	int ret;
2239 
2240 	memset(&ctx, 0x0, sizeof(ctx));
2241 	ret = ena_get_dev_stats(ena_dev, &ctx, ENA_ADMIN_GET_STATS_TYPE_BASIC);
2242 	if (likely(ret == 0))
2243 		memcpy(stats, &ctx.get_resp.u.basic_stats,
2244 		       sizeof(ctx.get_resp.u.basic_stats));
2245 
2246 	return ret;
2247 }
2248 
2249 int ena_com_set_dev_mtu(struct ena_com_dev *ena_dev, u32 mtu)
2250 {
2251 	struct ena_com_admin_queue *admin_queue;
2252 	struct ena_admin_set_feat_cmd cmd;
2253 	struct ena_admin_set_feat_resp resp;
2254 	int ret;
2255 
2256 	if (!ena_com_check_supported_feature_id(ena_dev, ENA_ADMIN_MTU)) {
2257 		netdev_dbg(ena_dev->net_device, "Feature %d isn't supported\n",
2258 			   ENA_ADMIN_MTU);
2259 		return -EOPNOTSUPP;
2260 	}
2261 
2262 	memset(&cmd, 0x0, sizeof(cmd));
2263 	admin_queue = &ena_dev->admin_queue;
2264 
2265 	cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2266 	cmd.aq_common_descriptor.flags = 0;
2267 	cmd.feat_common.feature_id = ENA_ADMIN_MTU;
2268 	cmd.u.mtu.mtu = mtu;
2269 
2270 	ret = ena_com_execute_admin_command(admin_queue,
2271 					    (struct ena_admin_aq_entry *)&cmd,
2272 					    sizeof(cmd),
2273 					    (struct ena_admin_acq_entry *)&resp,
2274 					    sizeof(resp));
2275 
2276 	if (unlikely(ret))
2277 		netdev_err(ena_dev->net_device,
2278 			   "Failed to set mtu %d. error: %d\n", mtu, ret);
2279 
2280 	return ret;
2281 }
2282 
2283 int ena_com_get_offload_settings(struct ena_com_dev *ena_dev,
2284 				 struct ena_admin_feature_offload_desc *offload)
2285 {
2286 	int ret;
2287 	struct ena_admin_get_feat_resp resp;
2288 
2289 	ret = ena_com_get_feature(ena_dev, &resp,
2290 				  ENA_ADMIN_STATELESS_OFFLOAD_CONFIG, 0);
2291 	if (unlikely(ret)) {
2292 		netdev_err(ena_dev->net_device,
2293 			   "Failed to get offload capabilities %d\n", ret);
2294 		return ret;
2295 	}
2296 
2297 	memcpy(offload, &resp.u.offload, sizeof(resp.u.offload));
2298 
2299 	return 0;
2300 }
2301 
2302 int ena_com_set_hash_function(struct ena_com_dev *ena_dev)
2303 {
2304 	struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
2305 	struct ena_rss *rss = &ena_dev->rss;
2306 	struct ena_admin_set_feat_cmd cmd;
2307 	struct ena_admin_set_feat_resp resp;
2308 	struct ena_admin_get_feat_resp get_resp;
2309 	int ret;
2310 
2311 	if (!ena_com_check_supported_feature_id(ena_dev,
2312 						ENA_ADMIN_RSS_HASH_FUNCTION)) {
2313 		netdev_dbg(ena_dev->net_device, "Feature %d isn't supported\n",
2314 			   ENA_ADMIN_RSS_HASH_FUNCTION);
2315 		return -EOPNOTSUPP;
2316 	}
2317 
2318 	/* Validate hash function is supported */
2319 	ret = ena_com_get_feature(ena_dev, &get_resp,
2320 				  ENA_ADMIN_RSS_HASH_FUNCTION, 0);
2321 	if (unlikely(ret))
2322 		return ret;
2323 
2324 	if (!(get_resp.u.flow_hash_func.supported_func & BIT(rss->hash_func))) {
2325 		netdev_err(ena_dev->net_device,
2326 			   "Func hash %d isn't supported by device, abort\n",
2327 			   rss->hash_func);
2328 		return -EOPNOTSUPP;
2329 	}
2330 
2331 	memset(&cmd, 0x0, sizeof(cmd));
2332 
2333 	cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2334 	cmd.aq_common_descriptor.flags =
2335 		ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
2336 	cmd.feat_common.feature_id = ENA_ADMIN_RSS_HASH_FUNCTION;
2337 	cmd.u.flow_hash_func.init_val = rss->hash_init_val;
2338 	cmd.u.flow_hash_func.selected_func = 1 << rss->hash_func;
2339 
2340 	ret = ena_com_mem_addr_set(ena_dev,
2341 				   &cmd.control_buffer.address,
2342 				   rss->hash_key_dma_addr);
2343 	if (unlikely(ret)) {
2344 		netdev_err(ena_dev->net_device, "Memory address set failed\n");
2345 		return ret;
2346 	}
2347 
2348 	cmd.control_buffer.length = sizeof(*rss->hash_key);
2349 
2350 	ret = ena_com_execute_admin_command(admin_queue,
2351 					    (struct ena_admin_aq_entry *)&cmd,
2352 					    sizeof(cmd),
2353 					    (struct ena_admin_acq_entry *)&resp,
2354 					    sizeof(resp));
2355 	if (unlikely(ret)) {
2356 		netdev_err(ena_dev->net_device,
2357 			   "Failed to set hash function %d. error: %d\n",
2358 			   rss->hash_func, ret);
2359 		return -EINVAL;
2360 	}
2361 
2362 	return 0;
2363 }
2364 
2365 int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
2366 			       enum ena_admin_hash_functions func,
2367 			       const u8 *key, u16 key_len, u32 init_val)
2368 {
2369 	struct ena_admin_feature_rss_flow_hash_control *hash_key;
2370 	struct ena_admin_get_feat_resp get_resp;
2371 	enum ena_admin_hash_functions old_func;
2372 	struct ena_rss *rss = &ena_dev->rss;
2373 	int rc;
2374 
2375 	hash_key = rss->hash_key;
2376 
2377 	/* Make sure size is a mult of DWs */
2378 	if (unlikely(key_len & 0x3))
2379 		return -EINVAL;
2380 
2381 	rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2382 				    ENA_ADMIN_RSS_HASH_FUNCTION,
2383 				    rss->hash_key_dma_addr,
2384 				    sizeof(*rss->hash_key), 0);
2385 	if (unlikely(rc))
2386 		return rc;
2387 
2388 	if (!(BIT(func) & get_resp.u.flow_hash_func.supported_func)) {
2389 		netdev_err(ena_dev->net_device,
2390 			   "Flow hash function %d isn't supported\n", func);
2391 		return -EOPNOTSUPP;
2392 	}
2393 
2394 	switch (func) {
2395 	case ENA_ADMIN_TOEPLITZ:
2396 		if (key) {
2397 			if (key_len != sizeof(hash_key->key)) {
2398 				netdev_err(ena_dev->net_device,
2399 					   "key len (%hu) doesn't equal the supported size (%zu)\n",
2400 					   key_len, sizeof(hash_key->key));
2401 				return -EINVAL;
2402 			}
2403 			memcpy(hash_key->key, key, key_len);
2404 			rss->hash_init_val = init_val;
2405 			hash_key->key_parts = key_len / sizeof(hash_key->key[0]);
2406 		}
2407 		break;
2408 	case ENA_ADMIN_CRC32:
2409 		rss->hash_init_val = init_val;
2410 		break;
2411 	default:
2412 		netdev_err(ena_dev->net_device, "Invalid hash function (%d)\n",
2413 			   func);
2414 		return -EINVAL;
2415 	}
2416 
2417 	old_func = rss->hash_func;
2418 	rss->hash_func = func;
2419 	rc = ena_com_set_hash_function(ena_dev);
2420 
2421 	/* Restore the old function */
2422 	if (unlikely(rc))
2423 		rss->hash_func = old_func;
2424 
2425 	return rc;
2426 }
2427 
2428 int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
2429 			      enum ena_admin_hash_functions *func)
2430 {
2431 	struct ena_rss *rss = &ena_dev->rss;
2432 	struct ena_admin_get_feat_resp get_resp;
2433 	int rc;
2434 
2435 	if (unlikely(!func))
2436 		return -EINVAL;
2437 
2438 	rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2439 				    ENA_ADMIN_RSS_HASH_FUNCTION,
2440 				    rss->hash_key_dma_addr,
2441 				    sizeof(*rss->hash_key), 0);
2442 	if (unlikely(rc))
2443 		return rc;
2444 
2445 	/* ffs() returns 1 in case the lsb is set */
2446 	rss->hash_func = ffs(get_resp.u.flow_hash_func.selected_func);
2447 	if (rss->hash_func)
2448 		rss->hash_func--;
2449 
2450 	*func = rss->hash_func;
2451 
2452 	return 0;
2453 }
2454 
2455 int ena_com_get_hash_key(struct ena_com_dev *ena_dev, u8 *key)
2456 {
2457 	struct ena_admin_feature_rss_flow_hash_control *hash_key =
2458 		ena_dev->rss.hash_key;
2459 
2460 	if (key)
2461 		memcpy(key, hash_key->key,
2462 		       (size_t)(hash_key->key_parts) * sizeof(hash_key->key[0]));
2463 
2464 	return 0;
2465 }
2466 
2467 int ena_com_get_hash_ctrl(struct ena_com_dev *ena_dev,
2468 			  enum ena_admin_flow_hash_proto proto,
2469 			  u16 *fields)
2470 {
2471 	struct ena_rss *rss = &ena_dev->rss;
2472 	struct ena_admin_get_feat_resp get_resp;
2473 	int rc;
2474 
2475 	rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2476 				    ENA_ADMIN_RSS_HASH_INPUT,
2477 				    rss->hash_ctrl_dma_addr,
2478 				    sizeof(*rss->hash_ctrl), 0);
2479 	if (unlikely(rc))
2480 		return rc;
2481 
2482 	if (fields)
2483 		*fields = rss->hash_ctrl->selected_fields[proto].fields;
2484 
2485 	return 0;
2486 }
2487 
2488 int ena_com_set_hash_ctrl(struct ena_com_dev *ena_dev)
2489 {
2490 	struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
2491 	struct ena_rss *rss = &ena_dev->rss;
2492 	struct ena_admin_feature_rss_hash_control *hash_ctrl = rss->hash_ctrl;
2493 	struct ena_admin_set_feat_cmd cmd;
2494 	struct ena_admin_set_feat_resp resp;
2495 	int ret;
2496 
2497 	if (!ena_com_check_supported_feature_id(ena_dev,
2498 						ENA_ADMIN_RSS_HASH_INPUT)) {
2499 		netdev_dbg(ena_dev->net_device, "Feature %d isn't supported\n",
2500 			   ENA_ADMIN_RSS_HASH_INPUT);
2501 		return -EOPNOTSUPP;
2502 	}
2503 
2504 	memset(&cmd, 0x0, sizeof(cmd));
2505 
2506 	cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2507 	cmd.aq_common_descriptor.flags =
2508 		ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
2509 	cmd.feat_common.feature_id = ENA_ADMIN_RSS_HASH_INPUT;
2510 	cmd.u.flow_hash_input.enabled_input_sort =
2511 		ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L3_SORT_MASK |
2512 		ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L4_SORT_MASK;
2513 
2514 	ret = ena_com_mem_addr_set(ena_dev,
2515 				   &cmd.control_buffer.address,
2516 				   rss->hash_ctrl_dma_addr);
2517 	if (unlikely(ret)) {
2518 		netdev_err(ena_dev->net_device, "Memory address set failed\n");
2519 		return ret;
2520 	}
2521 	cmd.control_buffer.length = sizeof(*hash_ctrl);
2522 
2523 	ret = ena_com_execute_admin_command(admin_queue,
2524 					    (struct ena_admin_aq_entry *)&cmd,
2525 					    sizeof(cmd),
2526 					    (struct ena_admin_acq_entry *)&resp,
2527 					    sizeof(resp));
2528 	if (unlikely(ret))
2529 		netdev_err(ena_dev->net_device,
2530 			   "Failed to set hash input. error: %d\n", ret);
2531 
2532 	return ret;
2533 }
2534 
2535 int ena_com_set_default_hash_ctrl(struct ena_com_dev *ena_dev)
2536 {
2537 	struct ena_rss *rss = &ena_dev->rss;
2538 	struct ena_admin_feature_rss_hash_control *hash_ctrl =
2539 		rss->hash_ctrl;
2540 	u16 available_fields = 0;
2541 	int rc, i;
2542 
2543 	/* Get the supported hash input */
2544 	rc = ena_com_get_hash_ctrl(ena_dev, 0, NULL);
2545 	if (unlikely(rc))
2546 		return rc;
2547 
2548 	hash_ctrl->selected_fields[ENA_ADMIN_RSS_TCP4].fields =
2549 		ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2550 		ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2551 
2552 	hash_ctrl->selected_fields[ENA_ADMIN_RSS_UDP4].fields =
2553 		ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2554 		ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2555 
2556 	hash_ctrl->selected_fields[ENA_ADMIN_RSS_TCP6].fields =
2557 		ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2558 		ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2559 
2560 	hash_ctrl->selected_fields[ENA_ADMIN_RSS_UDP6].fields =
2561 		ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2562 		ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2563 
2564 	hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP4].fields =
2565 		ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
2566 
2567 	hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP6].fields =
2568 		ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
2569 
2570 	hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP4_FRAG].fields =
2571 		ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
2572 
2573 	hash_ctrl->selected_fields[ENA_ADMIN_RSS_NOT_IP].fields =
2574 		ENA_ADMIN_RSS_L2_DA | ENA_ADMIN_RSS_L2_SA;
2575 
2576 	for (i = 0; i < ENA_ADMIN_RSS_PROTO_NUM; i++) {
2577 		available_fields = hash_ctrl->selected_fields[i].fields &
2578 				hash_ctrl->supported_fields[i].fields;
2579 		if (available_fields != hash_ctrl->selected_fields[i].fields) {
2580 			netdev_err(ena_dev->net_device,
2581 				   "Hash control doesn't support all the desire configuration. proto %x supported %x selected %x\n",
2582 				   i, hash_ctrl->supported_fields[i].fields,
2583 				   hash_ctrl->selected_fields[i].fields);
2584 			return -EOPNOTSUPP;
2585 		}
2586 	}
2587 
2588 	rc = ena_com_set_hash_ctrl(ena_dev);
2589 
2590 	/* In case of failure, restore the old hash ctrl */
2591 	if (unlikely(rc))
2592 		ena_com_get_hash_ctrl(ena_dev, 0, NULL);
2593 
2594 	return rc;
2595 }
2596 
2597 int ena_com_fill_hash_ctrl(struct ena_com_dev *ena_dev,
2598 			   enum ena_admin_flow_hash_proto proto,
2599 			   u16 hash_fields)
2600 {
2601 	struct ena_rss *rss = &ena_dev->rss;
2602 	struct ena_admin_feature_rss_hash_control *hash_ctrl = rss->hash_ctrl;
2603 	u16 supported_fields;
2604 	int rc;
2605 
2606 	if (proto >= ENA_ADMIN_RSS_PROTO_NUM) {
2607 		netdev_err(ena_dev->net_device, "Invalid proto num (%u)\n",
2608 			   proto);
2609 		return -EINVAL;
2610 	}
2611 
2612 	/* Get the ctrl table */
2613 	rc = ena_com_get_hash_ctrl(ena_dev, proto, NULL);
2614 	if (unlikely(rc))
2615 		return rc;
2616 
2617 	/* Make sure all the fields are supported */
2618 	supported_fields = hash_ctrl->supported_fields[proto].fields;
2619 	if ((hash_fields & supported_fields) != hash_fields) {
2620 		netdev_err(ena_dev->net_device,
2621 			   "Proto %d doesn't support the required fields %x. supports only: %x\n",
2622 			   proto, hash_fields, supported_fields);
2623 	}
2624 
2625 	hash_ctrl->selected_fields[proto].fields = hash_fields;
2626 
2627 	rc = ena_com_set_hash_ctrl(ena_dev);
2628 
2629 	/* In case of failure, restore the old hash ctrl */
2630 	if (unlikely(rc))
2631 		ena_com_get_hash_ctrl(ena_dev, 0, NULL);
2632 
2633 	return 0;
2634 }
2635 
2636 int ena_com_indirect_table_fill_entry(struct ena_com_dev *ena_dev,
2637 				      u16 entry_idx, u16 entry_value)
2638 {
2639 	struct ena_rss *rss = &ena_dev->rss;
2640 
2641 	if (unlikely(entry_idx >= (1 << rss->tbl_log_size)))
2642 		return -EINVAL;
2643 
2644 	if (unlikely((entry_value > ENA_TOTAL_NUM_QUEUES)))
2645 		return -EINVAL;
2646 
2647 	rss->host_rss_ind_tbl[entry_idx] = entry_value;
2648 
2649 	return 0;
2650 }
2651 
2652 int ena_com_indirect_table_set(struct ena_com_dev *ena_dev)
2653 {
2654 	struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
2655 	struct ena_rss *rss = &ena_dev->rss;
2656 	struct ena_admin_set_feat_cmd cmd;
2657 	struct ena_admin_set_feat_resp resp;
2658 	int ret;
2659 
2660 	if (!ena_com_check_supported_feature_id(
2661 		    ena_dev, ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG)) {
2662 		netdev_dbg(ena_dev->net_device, "Feature %d isn't supported\n",
2663 			   ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG);
2664 		return -EOPNOTSUPP;
2665 	}
2666 
2667 	ret = ena_com_ind_tbl_convert_to_device(ena_dev);
2668 	if (ret) {
2669 		netdev_err(ena_dev->net_device,
2670 			   "Failed to convert host indirection table to device table\n");
2671 		return ret;
2672 	}
2673 
2674 	memset(&cmd, 0x0, sizeof(cmd));
2675 
2676 	cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2677 	cmd.aq_common_descriptor.flags =
2678 		ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
2679 	cmd.feat_common.feature_id = ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG;
2680 	cmd.u.ind_table.size = rss->tbl_log_size;
2681 	cmd.u.ind_table.inline_index = 0xFFFFFFFF;
2682 
2683 	ret = ena_com_mem_addr_set(ena_dev,
2684 				   &cmd.control_buffer.address,
2685 				   rss->rss_ind_tbl_dma_addr);
2686 	if (unlikely(ret)) {
2687 		netdev_err(ena_dev->net_device, "Memory address set failed\n");
2688 		return ret;
2689 	}
2690 
2691 	cmd.control_buffer.length = (1ULL << rss->tbl_log_size) *
2692 		sizeof(struct ena_admin_rss_ind_table_entry);
2693 
2694 	ret = ena_com_execute_admin_command(admin_queue,
2695 					    (struct ena_admin_aq_entry *)&cmd,
2696 					    sizeof(cmd),
2697 					    (struct ena_admin_acq_entry *)&resp,
2698 					    sizeof(resp));
2699 
2700 	if (unlikely(ret))
2701 		netdev_err(ena_dev->net_device,
2702 			   "Failed to set indirect table. error: %d\n", ret);
2703 
2704 	return ret;
2705 }
2706 
2707 int ena_com_indirect_table_get(struct ena_com_dev *ena_dev, u32 *ind_tbl)
2708 {
2709 	struct ena_rss *rss = &ena_dev->rss;
2710 	struct ena_admin_get_feat_resp get_resp;
2711 	u32 tbl_size;
2712 	int i, rc;
2713 
2714 	tbl_size = (1ULL << rss->tbl_log_size) *
2715 		sizeof(struct ena_admin_rss_ind_table_entry);
2716 
2717 	rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2718 				    ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG,
2719 				    rss->rss_ind_tbl_dma_addr,
2720 				    tbl_size, 0);
2721 	if (unlikely(rc))
2722 		return rc;
2723 
2724 	if (!ind_tbl)
2725 		return 0;
2726 
2727 	for (i = 0; i < (1 << rss->tbl_log_size); i++)
2728 		ind_tbl[i] = rss->host_rss_ind_tbl[i];
2729 
2730 	return 0;
2731 }
2732 
2733 int ena_com_rss_init(struct ena_com_dev *ena_dev, u16 indr_tbl_log_size)
2734 {
2735 	int rc;
2736 
2737 	memset(&ena_dev->rss, 0x0, sizeof(ena_dev->rss));
2738 
2739 	rc = ena_com_indirect_table_allocate(ena_dev, indr_tbl_log_size);
2740 	if (unlikely(rc))
2741 		goto err_indr_tbl;
2742 
2743 	/* The following function might return unsupported in case the
2744 	 * device doesn't support setting the key / hash function. We can safely
2745 	 * ignore this error and have indirection table support only.
2746 	 */
2747 	rc = ena_com_hash_key_allocate(ena_dev);
2748 	if (likely(!rc))
2749 		ena_com_hash_key_fill_default_key(ena_dev);
2750 	else if (rc != -EOPNOTSUPP)
2751 		goto err_hash_key;
2752 
2753 	rc = ena_com_hash_ctrl_init(ena_dev);
2754 	if (unlikely(rc))
2755 		goto err_hash_ctrl;
2756 
2757 	return 0;
2758 
2759 err_hash_ctrl:
2760 	ena_com_hash_key_destroy(ena_dev);
2761 err_hash_key:
2762 	ena_com_indirect_table_destroy(ena_dev);
2763 err_indr_tbl:
2764 
2765 	return rc;
2766 }
2767 
2768 void ena_com_rss_destroy(struct ena_com_dev *ena_dev)
2769 {
2770 	ena_com_indirect_table_destroy(ena_dev);
2771 	ena_com_hash_key_destroy(ena_dev);
2772 	ena_com_hash_ctrl_destroy(ena_dev);
2773 
2774 	memset(&ena_dev->rss, 0x0, sizeof(ena_dev->rss));
2775 }
2776 
2777 int ena_com_allocate_host_info(struct ena_com_dev *ena_dev)
2778 {
2779 	struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2780 
2781 	host_attr->host_info =
2782 		dma_alloc_coherent(ena_dev->dmadev, SZ_4K,
2783 				   &host_attr->host_info_dma_addr, GFP_KERNEL);
2784 	if (unlikely(!host_attr->host_info))
2785 		return -ENOMEM;
2786 
2787 	host_attr->host_info->ena_spec_version = ((ENA_COMMON_SPEC_VERSION_MAJOR <<
2788 		ENA_REGS_VERSION_MAJOR_VERSION_SHIFT) |
2789 		(ENA_COMMON_SPEC_VERSION_MINOR));
2790 
2791 	return 0;
2792 }
2793 
2794 int ena_com_allocate_debug_area(struct ena_com_dev *ena_dev,
2795 				u32 debug_area_size)
2796 {
2797 	struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2798 
2799 	host_attr->debug_area_virt_addr =
2800 		dma_alloc_coherent(ena_dev->dmadev, debug_area_size,
2801 				   &host_attr->debug_area_dma_addr, GFP_KERNEL);
2802 	if (unlikely(!host_attr->debug_area_virt_addr)) {
2803 		host_attr->debug_area_size = 0;
2804 		return -ENOMEM;
2805 	}
2806 
2807 	host_attr->debug_area_size = debug_area_size;
2808 
2809 	return 0;
2810 }
2811 
2812 void ena_com_delete_host_info(struct ena_com_dev *ena_dev)
2813 {
2814 	struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2815 
2816 	if (host_attr->host_info) {
2817 		dma_free_coherent(ena_dev->dmadev, SZ_4K, host_attr->host_info,
2818 				  host_attr->host_info_dma_addr);
2819 		host_attr->host_info = NULL;
2820 	}
2821 }
2822 
2823 void ena_com_delete_debug_area(struct ena_com_dev *ena_dev)
2824 {
2825 	struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2826 
2827 	if (host_attr->debug_area_virt_addr) {
2828 		dma_free_coherent(ena_dev->dmadev, host_attr->debug_area_size,
2829 				  host_attr->debug_area_virt_addr,
2830 				  host_attr->debug_area_dma_addr);
2831 		host_attr->debug_area_virt_addr = NULL;
2832 	}
2833 }
2834 
2835 int ena_com_set_host_attributes(struct ena_com_dev *ena_dev)
2836 {
2837 	struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2838 	struct ena_com_admin_queue *admin_queue;
2839 	struct ena_admin_set_feat_cmd cmd;
2840 	struct ena_admin_set_feat_resp resp;
2841 
2842 	int ret;
2843 
2844 	/* Host attribute config is called before ena_com_get_dev_attr_feat
2845 	 * so ena_com can't check if the feature is supported.
2846 	 */
2847 
2848 	memset(&cmd, 0x0, sizeof(cmd));
2849 	admin_queue = &ena_dev->admin_queue;
2850 
2851 	cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2852 	cmd.feat_common.feature_id = ENA_ADMIN_HOST_ATTR_CONFIG;
2853 
2854 	ret = ena_com_mem_addr_set(ena_dev,
2855 				   &cmd.u.host_attr.debug_ba,
2856 				   host_attr->debug_area_dma_addr);
2857 	if (unlikely(ret)) {
2858 		netdev_err(ena_dev->net_device, "Memory address set failed\n");
2859 		return ret;
2860 	}
2861 
2862 	ret = ena_com_mem_addr_set(ena_dev,
2863 				   &cmd.u.host_attr.os_info_ba,
2864 				   host_attr->host_info_dma_addr);
2865 	if (unlikely(ret)) {
2866 		netdev_err(ena_dev->net_device, "Memory address set failed\n");
2867 		return ret;
2868 	}
2869 
2870 	cmd.u.host_attr.debug_area_size = host_attr->debug_area_size;
2871 
2872 	ret = ena_com_execute_admin_command(admin_queue,
2873 					    (struct ena_admin_aq_entry *)&cmd,
2874 					    sizeof(cmd),
2875 					    (struct ena_admin_acq_entry *)&resp,
2876 					    sizeof(resp));
2877 
2878 	if (unlikely(ret))
2879 		netdev_err(ena_dev->net_device,
2880 			   "Failed to set host attributes: %d\n", ret);
2881 
2882 	return ret;
2883 }
2884 
2885 /* Interrupt moderation */
2886 bool ena_com_interrupt_moderation_supported(struct ena_com_dev *ena_dev)
2887 {
2888 	return ena_com_check_supported_feature_id(ena_dev,
2889 						  ENA_ADMIN_INTERRUPT_MODERATION);
2890 }
2891 
2892 static int ena_com_update_nonadaptive_moderation_interval(struct ena_com_dev *ena_dev,
2893 							  u32 coalesce_usecs,
2894 							  u32 intr_delay_resolution,
2895 							  u32 *intr_moder_interval)
2896 {
2897 	if (!intr_delay_resolution) {
2898 		netdev_err(ena_dev->net_device,
2899 			   "Illegal interrupt delay granularity value\n");
2900 		return -EFAULT;
2901 	}
2902 
2903 	*intr_moder_interval = coalesce_usecs / intr_delay_resolution;
2904 
2905 	return 0;
2906 }
2907 
2908 int ena_com_update_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev,
2909 						      u32 tx_coalesce_usecs)
2910 {
2911 	return ena_com_update_nonadaptive_moderation_interval(ena_dev,
2912 							      tx_coalesce_usecs,
2913 							      ena_dev->intr_delay_resolution,
2914 							      &ena_dev->intr_moder_tx_interval);
2915 }
2916 
2917 int ena_com_update_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev,
2918 						      u32 rx_coalesce_usecs)
2919 {
2920 	return ena_com_update_nonadaptive_moderation_interval(ena_dev,
2921 							      rx_coalesce_usecs,
2922 							      ena_dev->intr_delay_resolution,
2923 							      &ena_dev->intr_moder_rx_interval);
2924 }
2925 
2926 int ena_com_init_interrupt_moderation(struct ena_com_dev *ena_dev)
2927 {
2928 	struct ena_admin_get_feat_resp get_resp;
2929 	u16 delay_resolution;
2930 	int rc;
2931 
2932 	rc = ena_com_get_feature(ena_dev, &get_resp,
2933 				 ENA_ADMIN_INTERRUPT_MODERATION, 0);
2934 
2935 	if (rc) {
2936 		if (rc == -EOPNOTSUPP) {
2937 			netdev_dbg(ena_dev->net_device,
2938 				   "Feature %d isn't supported\n",
2939 				   ENA_ADMIN_INTERRUPT_MODERATION);
2940 			rc = 0;
2941 		} else {
2942 			netdev_err(ena_dev->net_device,
2943 				   "Failed to get interrupt moderation admin cmd. rc: %d\n",
2944 				   rc);
2945 		}
2946 
2947 		/* no moderation supported, disable adaptive support */
2948 		ena_com_disable_adaptive_moderation(ena_dev);
2949 		return rc;
2950 	}
2951 
2952 	/* if moderation is supported by device we set adaptive moderation */
2953 	delay_resolution = get_resp.u.intr_moderation.intr_delay_resolution;
2954 	ena_com_update_intr_delay_resolution(ena_dev, delay_resolution);
2955 
2956 	/* Disable adaptive moderation by default - can be enabled later */
2957 	ena_com_disable_adaptive_moderation(ena_dev);
2958 
2959 	return 0;
2960 }
2961 
2962 unsigned int ena_com_get_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev)
2963 {
2964 	return ena_dev->intr_moder_tx_interval;
2965 }
2966 
2967 unsigned int ena_com_get_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev)
2968 {
2969 	return ena_dev->intr_moder_rx_interval;
2970 }
2971 
2972 int ena_com_config_dev_mode(struct ena_com_dev *ena_dev,
2973 			    struct ena_admin_feature_llq_desc *llq_features,
2974 			    struct ena_llq_configurations *llq_default_cfg)
2975 {
2976 	struct ena_com_llq_info *llq_info = &ena_dev->llq_info;
2977 	int rc;
2978 
2979 	if (!llq_features->max_llq_num) {
2980 		ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
2981 		return 0;
2982 	}
2983 
2984 	rc = ena_com_config_llq_info(ena_dev, llq_features, llq_default_cfg);
2985 	if (rc)
2986 		return rc;
2987 
2988 	ena_dev->tx_max_header_size = llq_info->desc_list_entry_size -
2989 		(llq_info->descs_num_before_header * sizeof(struct ena_eth_io_tx_desc));
2990 
2991 	if (unlikely(ena_dev->tx_max_header_size == 0)) {
2992 		netdev_err(ena_dev->net_device,
2993 			   "The size of the LLQ entry is smaller than needed\n");
2994 		return -EINVAL;
2995 	}
2996 
2997 	ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_DEV;
2998 
2999 	return 0;
3000 }
3001