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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / net / ethernet / amazon / ena / ena_com.c
blobbf2de5298005d0ea63ce0d9690d1786722881937
1 /*
2 * Copyright 2015 Amazon.com, Inc. or its affiliates.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33 #include "ena_com.h"
34
35 /*****************************************************************************/
36 /*****************************************************************************/
37
38 /* Timeout in micro-sec */
39 #define ADMIN_CMD_TIMEOUT_US (3000000)
40
41 #define ENA_ASYNC_QUEUE_DEPTH 16
42 #define ENA_ADMIN_QUEUE_DEPTH 32
43
44 #define MIN_ENA_VER (((ENA_COMMON_SPEC_VERSION_MAJOR) << \
45 ENA_REGS_VERSION_MAJOR_VERSION_SHIFT) \
46 | (ENA_COMMON_SPEC_VERSION_MINOR))
47
48 #define ENA_CTRL_MAJOR 0
49 #define ENA_CTRL_MINOR 0
50 #define ENA_CTRL_SUB_MINOR 1
51
52 #define MIN_ENA_CTRL_VER \
53 (((ENA_CTRL_MAJOR) << \
54 (ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_SHIFT)) | \
55 ((ENA_CTRL_MINOR) << \
56 (ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_SHIFT)) | \
57 (ENA_CTRL_SUB_MINOR))
58
59 #define ENA_DMA_ADDR_TO_UINT32_LOW(x) ((u32)((u64)(x)))
60 #define ENA_DMA_ADDR_TO_UINT32_HIGH(x) ((u32)(((u64)(x)) >> 32))
61
62 #define ENA_MMIO_READ_TIMEOUT 0xFFFFFFFF
63
64 #define ENA_REGS_ADMIN_INTR_MASK 1
65
66 #define ENA_POLL_MS 5
67
68 /*****************************************************************************/
69 /*****************************************************************************/
70 /*****************************************************************************/
71
72 enum ena_cmd_status {
73 ENA_CMD_SUBMITTED,
74 ENA_CMD_COMPLETED,
75 /* Abort - canceled by the driver */
76 ENA_CMD_ABORTED,
77 };
78
79 struct ena_comp_ctx {
80 struct completion wait_event;
81 struct ena_admin_acq_entry *user_cqe;
82 u32 comp_size;
83 enum ena_cmd_status status;
84 /* status from the device */
85 u8 comp_status;
86 u8 cmd_opcode;
87 bool occupied;
88 };
89
90 struct ena_com_stats_ctx {
91 struct ena_admin_aq_get_stats_cmd get_cmd;
92 struct ena_admin_acq_get_stats_resp get_resp;
93 };
94
95 static inline int ena_com_mem_addr_set(struct ena_com_dev *ena_dev,
96 struct ena_common_mem_addr *ena_addr,
97 dma_addr_t addr)
98 {
99 if ((addr & GENMASK_ULL(ena_dev->dma_addr_bits - 1, 0)) != addr) {
100 pr_err("dma address has more bits that the device supports\n");
101 return -EINVAL;
102 }
103
104 ena_addr->mem_addr_low = lower_32_bits(addr);
105 ena_addr->mem_addr_high = (u16)upper_32_bits(addr);
106
107 return 0;
108 }
109
110 static int ena_com_admin_init_sq(struct ena_com_admin_queue *queue)
111 {
112 struct ena_com_admin_sq *sq = &queue->sq;
113 u16 size = ADMIN_SQ_SIZE(queue->q_depth);
114
115 sq->entries = dma_zalloc_coherent(queue->q_dmadev, size, &sq->dma_addr,
116 GFP_KERNEL);
117
118 if (!sq->entries) {
119 pr_err("memory allocation failed");
120 return -ENOMEM;
121 }
122
123 sq->head = 0;
124 sq->tail = 0;
125 sq->phase = 1;
126
127 sq->db_addr = NULL;
128
129 return 0;
130 }
131
132 static int ena_com_admin_init_cq(struct ena_com_admin_queue *queue)
133 {
134 struct ena_com_admin_cq *cq = &queue->cq;
135 u16 size = ADMIN_CQ_SIZE(queue->q_depth);
136
137 cq->entries = dma_zalloc_coherent(queue->q_dmadev, size, &cq->dma_addr,
138 GFP_KERNEL);
139
140 if (!cq->entries) {
141 pr_err("memory allocation failed");
142 return -ENOMEM;
143 }
144
145 cq->head = 0;
146 cq->phase = 1;
147
148 return 0;
149 }
150
151 static int ena_com_admin_init_aenq(struct ena_com_dev *dev,
152 struct ena_aenq_handlers *aenq_handlers)
153 {
154 struct ena_com_aenq *aenq = &dev->aenq;
155 u32 addr_low, addr_high, aenq_caps;
156 u16 size;
157
158 dev->aenq.q_depth = ENA_ASYNC_QUEUE_DEPTH;
159 size = ADMIN_AENQ_SIZE(ENA_ASYNC_QUEUE_DEPTH);
160 aenq->entries = dma_zalloc_coherent(dev->dmadev, size, &aenq->dma_addr,
161 GFP_KERNEL);
162
163 if (!aenq->entries) {
164 pr_err("memory allocation failed");
165 return -ENOMEM;
166 }
167
168 aenq->head = aenq->q_depth;
169 aenq->phase = 1;
170
171 addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(aenq->dma_addr);
172 addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(aenq->dma_addr);
173
174 writel(addr_low, dev->reg_bar + ENA_REGS_AENQ_BASE_LO_OFF);
175 writel(addr_high, dev->reg_bar + ENA_REGS_AENQ_BASE_HI_OFF);
176
177 aenq_caps = 0;
178 aenq_caps |= dev->aenq.q_depth & ENA_REGS_AENQ_CAPS_AENQ_DEPTH_MASK;
179 aenq_caps |= (sizeof(struct ena_admin_aenq_entry)
180 << ENA_REGS_AENQ_CAPS_AENQ_ENTRY_SIZE_SHIFT) &
181 ENA_REGS_AENQ_CAPS_AENQ_ENTRY_SIZE_MASK;
182 writel(aenq_caps, dev->reg_bar + ENA_REGS_AENQ_CAPS_OFF);
183
184 if (unlikely(!aenq_handlers)) {
185 pr_err("aenq handlers pointer is NULL\n");
186 return -EINVAL;
187 }
188
189 aenq->aenq_handlers = aenq_handlers;
190
191 return 0;
192 }
193
194 static inline void comp_ctxt_release(struct ena_com_admin_queue *queue,
195 struct ena_comp_ctx *comp_ctx)
196 {
197 comp_ctx->occupied = false;
198 atomic_dec(&queue->outstanding_cmds);
199 }
200
201 static struct ena_comp_ctx *get_comp_ctxt(struct ena_com_admin_queue *queue,
202 u16 command_id, bool capture)
203 {
204 if (unlikely(command_id >= queue->q_depth)) {
205 pr_err("command id is larger than the queue size. cmd_id: %u queue size %d\n",
206 command_id, queue->q_depth);
207 return NULL;
208 }
209
210 if (unlikely(queue->comp_ctx[command_id].occupied && capture)) {
211 pr_err("Completion context is occupied\n");
212 return NULL;
213 }
214
215 if (capture) {
216 atomic_inc(&queue->outstanding_cmds);
217 queue->comp_ctx[command_id].occupied = true;
218 }
219
220 return &queue->comp_ctx[command_id];
221 }
222
223 static struct ena_comp_ctx *__ena_com_submit_admin_cmd(struct ena_com_admin_queue *admin_queue,
224 struct ena_admin_aq_entry *cmd,
225 size_t cmd_size_in_bytes,
226 struct ena_admin_acq_entry *comp,
227 size_t comp_size_in_bytes)
228 {
229 struct ena_comp_ctx *comp_ctx;
230 u16 tail_masked, cmd_id;
231 u16 queue_size_mask;
232 u16 cnt;
233
234 queue_size_mask = admin_queue->q_depth - 1;
235
236 tail_masked = admin_queue->sq.tail & queue_size_mask;
237
238 /* In case of queue FULL */
239 cnt = atomic_read(&admin_queue->outstanding_cmds);
240 if (cnt >= admin_queue->q_depth) {
241 pr_debug("admin queue is full.\n");
242 admin_queue->stats.out_of_space++;
243 return ERR_PTR(-ENOSPC);
244 }
245
246 cmd_id = admin_queue->curr_cmd_id;
247
248 cmd->aq_common_descriptor.flags |= admin_queue->sq.phase &
249 ENA_ADMIN_AQ_COMMON_DESC_PHASE_MASK;
250
251 cmd->aq_common_descriptor.command_id |= cmd_id &
252 ENA_ADMIN_AQ_COMMON_DESC_COMMAND_ID_MASK;
253
254 comp_ctx = get_comp_ctxt(admin_queue, cmd_id, true);
255 if (unlikely(!comp_ctx))
256 return ERR_PTR(-EINVAL);
257
258 comp_ctx->status = ENA_CMD_SUBMITTED;
259 comp_ctx->comp_size = (u32)comp_size_in_bytes;
260 comp_ctx->user_cqe = comp;
261 comp_ctx->cmd_opcode = cmd->aq_common_descriptor.opcode;
262
263 reinit_completion(&comp_ctx->wait_event);
264
265 memcpy(&admin_queue->sq.entries[tail_masked], cmd, cmd_size_in_bytes);
266
267 admin_queue->curr_cmd_id = (admin_queue->curr_cmd_id + 1) &
268 queue_size_mask;
269
270 admin_queue->sq.tail++;
271 admin_queue->stats.submitted_cmd++;
272
273 if (unlikely((admin_queue->sq.tail & queue_size_mask) == 0))
274 admin_queue->sq.phase = !admin_queue->sq.phase;
275
276 writel(admin_queue->sq.tail, admin_queue->sq.db_addr);
277
278 return comp_ctx;
279 }
280
281 static inline int ena_com_init_comp_ctxt(struct ena_com_admin_queue *queue)
282 {
283 size_t size = queue->q_depth * sizeof(struct ena_comp_ctx);
284 struct ena_comp_ctx *comp_ctx;
285 u16 i;
286
287 queue->comp_ctx = devm_kzalloc(queue->q_dmadev, size, GFP_KERNEL);
288 if (unlikely(!queue->comp_ctx)) {
289 pr_err("memory allocation failed");
290 return -ENOMEM;
291 }
292
293 for (i = 0; i < queue->q_depth; i++) {
294 comp_ctx = get_comp_ctxt(queue, i, false);
295 if (comp_ctx)
296 init_completion(&comp_ctx->wait_event);
297 }
298
299 return 0;
300 }
301
302 static struct ena_comp_ctx *ena_com_submit_admin_cmd(struct ena_com_admin_queue *admin_queue,
303 struct ena_admin_aq_entry *cmd,
304 size_t cmd_size_in_bytes,
305 struct ena_admin_acq_entry *comp,
306 size_t comp_size_in_bytes)
307 {
308 unsigned long flags;
309 struct ena_comp_ctx *comp_ctx;
310
311 spin_lock_irqsave(&admin_queue->q_lock, flags);
312 if (unlikely(!admin_queue->running_state)) {
313 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
314 return ERR_PTR(-ENODEV);
315 }
316 comp_ctx = __ena_com_submit_admin_cmd(admin_queue, cmd,
317 cmd_size_in_bytes,
318 comp,
319 comp_size_in_bytes);
320 if (IS_ERR(comp_ctx))
321 admin_queue->running_state = false;
322 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
323
324 return comp_ctx;
325 }
326
327 static int ena_com_init_io_sq(struct ena_com_dev *ena_dev,
328 struct ena_com_create_io_ctx *ctx,
329 struct ena_com_io_sq *io_sq)
330 {
331 size_t size;
332 int dev_node = 0;
333
334 memset(&io_sq->desc_addr, 0x0, sizeof(io_sq->desc_addr));
335
336 io_sq->desc_entry_size =
337 (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX) ?
338 sizeof(struct ena_eth_io_tx_desc) :
339 sizeof(struct ena_eth_io_rx_desc);
340
341 size = io_sq->desc_entry_size * io_sq->q_depth;
342
343 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST) {
344 dev_node = dev_to_node(ena_dev->dmadev);
345 set_dev_node(ena_dev->dmadev, ctx->numa_node);
346 io_sq->desc_addr.virt_addr =
347 dma_zalloc_coherent(ena_dev->dmadev, size,
348 &io_sq->desc_addr.phys_addr,
349 GFP_KERNEL);
350 set_dev_node(ena_dev->dmadev, dev_node);
351 if (!io_sq->desc_addr.virt_addr) {
352 io_sq->desc_addr.virt_addr =
353 dma_zalloc_coherent(ena_dev->dmadev, size,
354 &io_sq->desc_addr.phys_addr,
355 GFP_KERNEL);
356 }
357 } else {
358 dev_node = dev_to_node(ena_dev->dmadev);
359 set_dev_node(ena_dev->dmadev, ctx->numa_node);
360 io_sq->desc_addr.virt_addr =
361 devm_kzalloc(ena_dev->dmadev, size, GFP_KERNEL);
362 set_dev_node(ena_dev->dmadev, dev_node);
363 if (!io_sq->desc_addr.virt_addr) {
364 io_sq->desc_addr.virt_addr =
365 devm_kzalloc(ena_dev->dmadev, size, GFP_KERNEL);
366 }
367 }
368
369 if (!io_sq->desc_addr.virt_addr) {
370 pr_err("memory allocation failed");
371 return -ENOMEM;
372 }
373
374 io_sq->tail = 0;
375 io_sq->next_to_comp = 0;
376 io_sq->phase = 1;
377
378 return 0;
379 }
380
381 static int ena_com_init_io_cq(struct ena_com_dev *ena_dev,
382 struct ena_com_create_io_ctx *ctx,
383 struct ena_com_io_cq *io_cq)
384 {
385 size_t size;
386 int prev_node = 0;
387
388 memset(&io_cq->cdesc_addr, 0x0, sizeof(io_cq->cdesc_addr));
389
390 /* Use the basic completion descriptor for Rx */
391 io_cq->cdesc_entry_size_in_bytes =
392 (io_cq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX) ?
393 sizeof(struct ena_eth_io_tx_cdesc) :
394 sizeof(struct ena_eth_io_rx_cdesc_base);
395
396 size = io_cq->cdesc_entry_size_in_bytes * io_cq->q_depth;
397
398 prev_node = dev_to_node(ena_dev->dmadev);
399 set_dev_node(ena_dev->dmadev, ctx->numa_node);
400 io_cq->cdesc_addr.virt_addr =
401 dma_zalloc_coherent(ena_dev->dmadev, size,
402 &io_cq->cdesc_addr.phys_addr, GFP_KERNEL);
403 set_dev_node(ena_dev->dmadev, prev_node);
404 if (!io_cq->cdesc_addr.virt_addr) {
405 io_cq->cdesc_addr.virt_addr =
406 dma_zalloc_coherent(ena_dev->dmadev, size,
407 &io_cq->cdesc_addr.phys_addr,
408 GFP_KERNEL);
409 }
410
411 if (!io_cq->cdesc_addr.virt_addr) {
412 pr_err("memory allocation failed");
413 return -ENOMEM;
414 }
415
416 io_cq->phase = 1;
417 io_cq->head = 0;
418
419 return 0;
420 }
421
422 static void ena_com_handle_single_admin_completion(struct ena_com_admin_queue *admin_queue,
423 struct ena_admin_acq_entry *cqe)
424 {
425 struct ena_comp_ctx *comp_ctx;
426 u16 cmd_id;
427
428 cmd_id = cqe->acq_common_descriptor.command &
429 ENA_ADMIN_ACQ_COMMON_DESC_COMMAND_ID_MASK;
430
431 comp_ctx = get_comp_ctxt(admin_queue, cmd_id, false);
432 if (unlikely(!comp_ctx)) {
433 pr_err("comp_ctx is NULL. Changing the admin queue running state\n");
434 admin_queue->running_state = false;
435 return;
436 }
437
438 comp_ctx->status = ENA_CMD_COMPLETED;
439 comp_ctx->comp_status = cqe->acq_common_descriptor.status;
440
441 if (comp_ctx->user_cqe)
442 memcpy(comp_ctx->user_cqe, (void *)cqe, comp_ctx->comp_size);
443
444 if (!admin_queue->polling)
445 complete(&comp_ctx->wait_event);
446 }
447
448 static void ena_com_handle_admin_completion(struct ena_com_admin_queue *admin_queue)
449 {
450 struct ena_admin_acq_entry *cqe = NULL;
451 u16 comp_num = 0;
452 u16 head_masked;
453 u8 phase;
454
455 head_masked = admin_queue->cq.head & (admin_queue->q_depth - 1);
456 phase = admin_queue->cq.phase;
457
458 cqe = &admin_queue->cq.entries[head_masked];
459
460 /* Go over all the completions */
461 while ((cqe->acq_common_descriptor.flags &
462 ENA_ADMIN_ACQ_COMMON_DESC_PHASE_MASK) == phase) {
463 /* Do not read the rest of the completion entry before the
464 * phase bit was validated
465 */
466 rmb();
467 ena_com_handle_single_admin_completion(admin_queue, cqe);
468
469 head_masked++;
470 comp_num++;
471 if (unlikely(head_masked == admin_queue->q_depth)) {
472 head_masked = 0;
473 phase = !phase;
474 }
475
476 cqe = &admin_queue->cq.entries[head_masked];
477 }
478
479 admin_queue->cq.head += comp_num;
480 admin_queue->cq.phase = phase;
481 admin_queue->sq.head += comp_num;
482 admin_queue->stats.completed_cmd += comp_num;
483 }
484
485 static int ena_com_comp_status_to_errno(u8 comp_status)
486 {
487 if (unlikely(comp_status != 0))
488 pr_err("admin command failed[%u]\n", comp_status);
489
490 if (unlikely(comp_status > ENA_ADMIN_UNKNOWN_ERROR))
491 return -EINVAL;
492
493 switch (comp_status) {
494 case ENA_ADMIN_SUCCESS:
495 return 0;
496 case ENA_ADMIN_RESOURCE_ALLOCATION_FAILURE:
497 return -ENOMEM;
498 case ENA_ADMIN_UNSUPPORTED_OPCODE:
499 return -EOPNOTSUPP;
500 case ENA_ADMIN_BAD_OPCODE:
501 case ENA_ADMIN_MALFORMED_REQUEST:
502 case ENA_ADMIN_ILLEGAL_PARAMETER:
503 case ENA_ADMIN_UNKNOWN_ERROR:
504 return -EINVAL;
505 }
506
507 return 0;
508 }
509
510 static int ena_com_wait_and_process_admin_cq_polling(struct ena_comp_ctx *comp_ctx,
511 struct ena_com_admin_queue *admin_queue)
512 {
513 unsigned long flags, timeout;
514 int ret;
515
516 timeout = jiffies + usecs_to_jiffies(admin_queue->completion_timeout);
517
518 while (1) {
519 spin_lock_irqsave(&admin_queue->q_lock, flags);
520 ena_com_handle_admin_completion(admin_queue);
521 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
522
523 if (comp_ctx->status != ENA_CMD_SUBMITTED)
524 break;
525
526 if (time_is_before_jiffies(timeout)) {
527 pr_err("Wait for completion (polling) timeout\n");
528 /* ENA didn't have any completion */
529 spin_lock_irqsave(&admin_queue->q_lock, flags);
530 admin_queue->stats.no_completion++;
531 admin_queue->running_state = false;
532 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
533
534 ret = -ETIME;
535 goto err;
536 }
537
538 msleep(ENA_POLL_MS);
539 }
540
541 if (unlikely(comp_ctx->status == ENA_CMD_ABORTED)) {
542 pr_err("Command was aborted\n");
543 spin_lock_irqsave(&admin_queue->q_lock, flags);
544 admin_queue->stats.aborted_cmd++;
545 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
546 ret = -ENODEV;
547 goto err;
548 }
549
550 WARN(comp_ctx->status != ENA_CMD_COMPLETED, "Invalid comp status %d\n",
551 comp_ctx->status);
552
553 ret = ena_com_comp_status_to_errno(comp_ctx->comp_status);
554 err:
555 comp_ctxt_release(admin_queue, comp_ctx);
556 return ret;
557 }
558
559 static int ena_com_wait_and_process_admin_cq_interrupts(struct ena_comp_ctx *comp_ctx,
560 struct ena_com_admin_queue *admin_queue)
561 {
562 unsigned long flags;
563 int ret;
564
565 wait_for_completion_timeout(&comp_ctx->wait_event,
566 usecs_to_jiffies(
567 admin_queue->completion_timeout));
568
569 /* In case the command wasn't completed find out the root cause.
570 * There might be 2 kinds of errors
571 * 1) No completion (timeout reached)
572 * 2) There is completion but the device didn't get any msi-x interrupt.
573 */
574 if (unlikely(comp_ctx->status == ENA_CMD_SUBMITTED)) {
575 spin_lock_irqsave(&admin_queue->q_lock, flags);
576 ena_com_handle_admin_completion(admin_queue);
577 admin_queue->stats.no_completion++;
578 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
579
580 if (comp_ctx->status == ENA_CMD_COMPLETED)
581 pr_err("The ena device have completion but the driver didn't receive any MSI-X interrupt (cmd %d)\n",
582 comp_ctx->cmd_opcode);
583 else
584 pr_err("The ena device doesn't send any completion for the admin cmd %d status %d\n",
585 comp_ctx->cmd_opcode, comp_ctx->status);
586
587 admin_queue->running_state = false;
588 ret = -ETIME;
589 goto err;
590 }
591
592 ret = ena_com_comp_status_to_errno(comp_ctx->comp_status);
593 err:
594 comp_ctxt_release(admin_queue, comp_ctx);
595 return ret;
596 }
597
598 /* This method read the hardware device register through posting writes
599 * and waiting for response
600 * On timeout the function will return ENA_MMIO_READ_TIMEOUT
601 */
602 static u32 ena_com_reg_bar_read32(struct ena_com_dev *ena_dev, u16 offset)
603 {
604 struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
605 volatile struct ena_admin_ena_mmio_req_read_less_resp *read_resp =
606 mmio_read->read_resp;
607 u32 mmio_read_reg, ret, i;
608 unsigned long flags;
609 u32 timeout = mmio_read->reg_read_to;
610
611 might_sleep();
612
613 if (timeout == 0)
614 timeout = ENA_REG_READ_TIMEOUT;
615
616 /* If readless is disabled, perform regular read */
617 if (!mmio_read->readless_supported)
618 return readl(ena_dev->reg_bar + offset);
619
620 spin_lock_irqsave(&mmio_read->lock, flags);
621 mmio_read->seq_num++;
622
623 read_resp->req_id = mmio_read->seq_num + 0xDEAD;
624 mmio_read_reg = (offset << ENA_REGS_MMIO_REG_READ_REG_OFF_SHIFT) &
625 ENA_REGS_MMIO_REG_READ_REG_OFF_MASK;
626 mmio_read_reg |= mmio_read->seq_num &
627 ENA_REGS_MMIO_REG_READ_REQ_ID_MASK;
628
629 /* make sure read_resp->req_id get updated before the hw can write
630 * there
631 */
632 wmb();
633
634 writel(mmio_read_reg, ena_dev->reg_bar + ENA_REGS_MMIO_REG_READ_OFF);
635
636 for (i = 0; i < timeout; i++) {
637 if (read_resp->req_id == mmio_read->seq_num)
638 break;
639
640 udelay(1);
641 }
642
643 if (unlikely(i == timeout)) {
644 pr_err("reading reg failed for timeout. expected: req id[%hu] offset[%hu] actual: req id[%hu] offset[%hu]\n",
645 mmio_read->seq_num, offset, read_resp->req_id,
646 read_resp->reg_off);
647 ret = ENA_MMIO_READ_TIMEOUT;
648 goto err;
649 }
650
651 if (read_resp->reg_off != offset) {
652 pr_err("Read failure: wrong offset provided");
653 ret = ENA_MMIO_READ_TIMEOUT;
654 } else {
655 ret = read_resp->reg_val;
656 }
657 err:
658 spin_unlock_irqrestore(&mmio_read->lock, flags);
659
660 return ret;
661 }
662
663 /* There are two types to wait for completion.
664 * Polling mode - wait until the completion is available.
665 * Async mode - wait on wait queue until the completion is ready
666 * (or the timeout expired).
667 * It is expected that the IRQ called ena_com_handle_admin_completion
668 * to mark the completions.
669 */
670 static int ena_com_wait_and_process_admin_cq(struct ena_comp_ctx *comp_ctx,
671 struct ena_com_admin_queue *admin_queue)
672 {
673 if (admin_queue->polling)
674 return ena_com_wait_and_process_admin_cq_polling(comp_ctx,
675 admin_queue);
676
677 return ena_com_wait_and_process_admin_cq_interrupts(comp_ctx,
678 admin_queue);
679 }
680
681 static int ena_com_destroy_io_sq(struct ena_com_dev *ena_dev,
682 struct ena_com_io_sq *io_sq)
683 {
684 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
685 struct ena_admin_aq_destroy_sq_cmd destroy_cmd;
686 struct ena_admin_acq_destroy_sq_resp_desc destroy_resp;
687 u8 direction;
688 int ret;
689
690 memset(&destroy_cmd, 0x0, sizeof(destroy_cmd));
691
692 if (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
693 direction = ENA_ADMIN_SQ_DIRECTION_TX;
694 else
695 direction = ENA_ADMIN_SQ_DIRECTION_RX;
696
697 destroy_cmd.sq.sq_identity |= (direction <<
698 ENA_ADMIN_SQ_SQ_DIRECTION_SHIFT) &
699 ENA_ADMIN_SQ_SQ_DIRECTION_MASK;
700
701 destroy_cmd.sq.sq_idx = io_sq->idx;
702 destroy_cmd.aq_common_descriptor.opcode = ENA_ADMIN_DESTROY_SQ;
703
704 ret = ena_com_execute_admin_command(admin_queue,
705 (struct ena_admin_aq_entry *)&destroy_cmd,
706 sizeof(destroy_cmd),
707 (struct ena_admin_acq_entry *)&destroy_resp,
708 sizeof(destroy_resp));
709
710 if (unlikely(ret && (ret != -ENODEV)))
711 pr_err("failed to destroy io sq error: %d\n", ret);
712
713 return ret;
714 }
715
716 static void ena_com_io_queue_free(struct ena_com_dev *ena_dev,
717 struct ena_com_io_sq *io_sq,
718 struct ena_com_io_cq *io_cq)
719 {
720 size_t size;
721
722 if (io_cq->cdesc_addr.virt_addr) {
723 size = io_cq->cdesc_entry_size_in_bytes * io_cq->q_depth;
724
725 dma_free_coherent(ena_dev->dmadev, size,
726 io_cq->cdesc_addr.virt_addr,
727 io_cq->cdesc_addr.phys_addr);
728
729 io_cq->cdesc_addr.virt_addr = NULL;
730 }
731
732 if (io_sq->desc_addr.virt_addr) {
733 size = io_sq->desc_entry_size * io_sq->q_depth;
734
735 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)
736 dma_free_coherent(ena_dev->dmadev, size,
737 io_sq->desc_addr.virt_addr,
738 io_sq->desc_addr.phys_addr);
739 else
740 devm_kfree(ena_dev->dmadev, io_sq->desc_addr.virt_addr);
741
742 io_sq->desc_addr.virt_addr = NULL;
743 }
744 }
745
746 static int wait_for_reset_state(struct ena_com_dev *ena_dev, u32 timeout,
747 u16 exp_state)
748 {
749 u32 val, i;
750
751 /* Convert timeout from resolution of 100ms to ENA_POLL_MS */
752 timeout = (timeout * 100) / ENA_POLL_MS;
753
754 for (i = 0; i < timeout; i++) {
755 val = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
756
757 if (unlikely(val == ENA_MMIO_READ_TIMEOUT)) {
758 pr_err("Reg read timeout occurred\n");
759 return -ETIME;
760 }
761
762 if ((val & ENA_REGS_DEV_STS_RESET_IN_PROGRESS_MASK) ==
763 exp_state)
764 return 0;
765
766 msleep(ENA_POLL_MS);
767 }
768
769 return -ETIME;
770 }
771
772 static bool ena_com_check_supported_feature_id(struct ena_com_dev *ena_dev,
773 enum ena_admin_aq_feature_id feature_id)
774 {
775 u32 feature_mask = 1 << feature_id;
776
777 /* Device attributes is always supported */
778 if ((feature_id != ENA_ADMIN_DEVICE_ATTRIBUTES) &&
779 !(ena_dev->supported_features & feature_mask))
780 return false;
781
782 return true;
783 }
784
785 static int ena_com_get_feature_ex(struct ena_com_dev *ena_dev,
786 struct ena_admin_get_feat_resp *get_resp,
787 enum ena_admin_aq_feature_id feature_id,
788 dma_addr_t control_buf_dma_addr,
789 u32 control_buff_size)
790 {
791 struct ena_com_admin_queue *admin_queue;
792 struct ena_admin_get_feat_cmd get_cmd;
793 int ret;
794
795 if (!ena_com_check_supported_feature_id(ena_dev, feature_id)) {
796 pr_debug("Feature %d isn't supported\n", feature_id);
797 return -EOPNOTSUPP;
798 }
799
800 memset(&get_cmd, 0x0, sizeof(get_cmd));
801 admin_queue = &ena_dev->admin_queue;
802
803 get_cmd.aq_common_descriptor.opcode = ENA_ADMIN_GET_FEATURE;
804
805 if (control_buff_size)
806 get_cmd.aq_common_descriptor.flags =
807 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
808 else
809 get_cmd.aq_common_descriptor.flags = 0;
810
811 ret = ena_com_mem_addr_set(ena_dev,
812 &get_cmd.control_buffer.address,
813 control_buf_dma_addr);
814 if (unlikely(ret)) {
815 pr_err("memory address set failed\n");
816 return ret;
817 }
818
819 get_cmd.control_buffer.length = control_buff_size;
820
821 get_cmd.feat_common.feature_id = feature_id;
822
823 ret = ena_com_execute_admin_command(admin_queue,
824 (struct ena_admin_aq_entry *)
825 &get_cmd,
826 sizeof(get_cmd),
827 (struct ena_admin_acq_entry *)
828 get_resp,
829 sizeof(*get_resp));
830
831 if (unlikely(ret))
832 pr_err("Failed to submit get_feature command %d error: %d\n",
833 feature_id, ret);
834
835 return ret;
836 }
837
838 static int ena_com_get_feature(struct ena_com_dev *ena_dev,
839 struct ena_admin_get_feat_resp *get_resp,
840 enum ena_admin_aq_feature_id feature_id)
841 {
842 return ena_com_get_feature_ex(ena_dev,
843 get_resp,
844 feature_id,
845 0,
846 0);
847 }
848
849 static int ena_com_hash_key_allocate(struct ena_com_dev *ena_dev)
850 {
851 struct ena_rss *rss = &ena_dev->rss;
852
853 rss->hash_key =
854 dma_zalloc_coherent(ena_dev->dmadev, sizeof(*rss->hash_key),
855 &rss->hash_key_dma_addr, GFP_KERNEL);
856
857 if (unlikely(!rss->hash_key))
858 return -ENOMEM;
859
860 return 0;
861 }
862
863 static void ena_com_hash_key_destroy(struct ena_com_dev *ena_dev)
864 {
865 struct ena_rss *rss = &ena_dev->rss;
866
867 if (rss->hash_key)
868 dma_free_coherent(ena_dev->dmadev, sizeof(*rss->hash_key),
869 rss->hash_key, rss->hash_key_dma_addr);
870 rss->hash_key = NULL;
871 }
872
873 static int ena_com_hash_ctrl_init(struct ena_com_dev *ena_dev)
874 {
875 struct ena_rss *rss = &ena_dev->rss;
876
877 rss->hash_ctrl =
878 dma_zalloc_coherent(ena_dev->dmadev, sizeof(*rss->hash_ctrl),
879 &rss->hash_ctrl_dma_addr, GFP_KERNEL);
880
881 if (unlikely(!rss->hash_ctrl))
882 return -ENOMEM;
883
884 return 0;
885 }
886
887 static void ena_com_hash_ctrl_destroy(struct ena_com_dev *ena_dev)
888 {
889 struct ena_rss *rss = &ena_dev->rss;
890
891 if (rss->hash_ctrl)
892 dma_free_coherent(ena_dev->dmadev, sizeof(*rss->hash_ctrl),
893 rss->hash_ctrl, rss->hash_ctrl_dma_addr);
894 rss->hash_ctrl = NULL;
895 }
896
897 static int ena_com_indirect_table_allocate(struct ena_com_dev *ena_dev,
898 u16 log_size)
899 {
900 struct ena_rss *rss = &ena_dev->rss;
901 struct ena_admin_get_feat_resp get_resp;
902 size_t tbl_size;
903 int ret;
904
905 ret = ena_com_get_feature(ena_dev, &get_resp,
906 ENA_ADMIN_RSS_REDIRECTION_TABLE_CONFIG);
907 if (unlikely(ret))
908 return ret;
909
910 if ((get_resp.u.ind_table.min_size > log_size) ||
911 (get_resp.u.ind_table.max_size < log_size)) {
912 pr_err("indirect table size doesn't fit. requested size: %d while min is:%d and max %d\n",
913 1 << log_size, 1 << get_resp.u.ind_table.min_size,
914 1 << get_resp.u.ind_table.max_size);
915 return -EINVAL;
916 }
917
918 tbl_size = (1ULL << log_size) *
919 sizeof(struct ena_admin_rss_ind_table_entry);
920
921 rss->rss_ind_tbl =
922 dma_zalloc_coherent(ena_dev->dmadev, tbl_size,
923 &rss->rss_ind_tbl_dma_addr, GFP_KERNEL);
924 if (unlikely(!rss->rss_ind_tbl))
925 goto mem_err1;
926
927 tbl_size = (1ULL << log_size) * sizeof(u16);
928 rss->host_rss_ind_tbl =
929 devm_kzalloc(ena_dev->dmadev, tbl_size, GFP_KERNEL);
930 if (unlikely(!rss->host_rss_ind_tbl))
931 goto mem_err2;
932
933 rss->tbl_log_size = log_size;
934
935 return 0;
936
937 mem_err2:
938 tbl_size = (1ULL << log_size) *
939 sizeof(struct ena_admin_rss_ind_table_entry);
940
941 dma_free_coherent(ena_dev->dmadev, tbl_size, rss->rss_ind_tbl,
942 rss->rss_ind_tbl_dma_addr);
943 rss->rss_ind_tbl = NULL;
944 mem_err1:
945 rss->tbl_log_size = 0;
946 return -ENOMEM;
947 }
948
949 static void ena_com_indirect_table_destroy(struct ena_com_dev *ena_dev)
950 {
951 struct ena_rss *rss = &ena_dev->rss;
952 size_t tbl_size = (1ULL << rss->tbl_log_size) *
953 sizeof(struct ena_admin_rss_ind_table_entry);
954
955 if (rss->rss_ind_tbl)
956 dma_free_coherent(ena_dev->dmadev, tbl_size, rss->rss_ind_tbl,
957 rss->rss_ind_tbl_dma_addr);
958 rss->rss_ind_tbl = NULL;
959
960 if (rss->host_rss_ind_tbl)
961 devm_kfree(ena_dev->dmadev, rss->host_rss_ind_tbl);
962 rss->host_rss_ind_tbl = NULL;
963 }
964
965 static int ena_com_create_io_sq(struct ena_com_dev *ena_dev,
966 struct ena_com_io_sq *io_sq, u16 cq_idx)
967 {
968 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
969 struct ena_admin_aq_create_sq_cmd create_cmd;
970 struct ena_admin_acq_create_sq_resp_desc cmd_completion;
971 u8 direction;
972 int ret;
973
974 memset(&create_cmd, 0x0, sizeof(create_cmd));
975
976 create_cmd.aq_common_descriptor.opcode = ENA_ADMIN_CREATE_SQ;
977
978 if (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
979 direction = ENA_ADMIN_SQ_DIRECTION_TX;
980 else
981 direction = ENA_ADMIN_SQ_DIRECTION_RX;
982
983 create_cmd.sq_identity |= (direction <<
984 ENA_ADMIN_AQ_CREATE_SQ_CMD_SQ_DIRECTION_SHIFT) &
985 ENA_ADMIN_AQ_CREATE_SQ_CMD_SQ_DIRECTION_MASK;
986
987 create_cmd.sq_caps_2 |= io_sq->mem_queue_type &
988 ENA_ADMIN_AQ_CREATE_SQ_CMD_PLACEMENT_POLICY_MASK;
989
990 create_cmd.sq_caps_2 |= (ENA_ADMIN_COMPLETION_POLICY_DESC <<
991 ENA_ADMIN_AQ_CREATE_SQ_CMD_COMPLETION_POLICY_SHIFT) &
992 ENA_ADMIN_AQ_CREATE_SQ_CMD_COMPLETION_POLICY_MASK;
993
994 create_cmd.sq_caps_3 |=
995 ENA_ADMIN_AQ_CREATE_SQ_CMD_IS_PHYSICALLY_CONTIGUOUS_MASK;
996
997 create_cmd.cq_idx = cq_idx;
998 create_cmd.sq_depth = io_sq->q_depth;
999
1000 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST) {
1001 ret = ena_com_mem_addr_set(ena_dev,
1002 &create_cmd.sq_ba,
1003 io_sq->desc_addr.phys_addr);
1004 if (unlikely(ret)) {
1005 pr_err("memory address set failed\n");
1006 return ret;
1007 }
1008 }
1009
1010 ret = ena_com_execute_admin_command(admin_queue,
1011 (struct ena_admin_aq_entry *)&create_cmd,
1012 sizeof(create_cmd),
1013 (struct ena_admin_acq_entry *)&cmd_completion,
1014 sizeof(cmd_completion));
1015 if (unlikely(ret)) {
1016 pr_err("Failed to create IO SQ. error: %d\n", ret);
1017 return ret;
1018 }
1019
1020 io_sq->idx = cmd_completion.sq_idx;
1021
1022 io_sq->db_addr = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1023 (uintptr_t)cmd_completion.sq_doorbell_offset);
1024
1025 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
1026 io_sq->header_addr = (u8 __iomem *)((uintptr_t)ena_dev->mem_bar
1027 + cmd_completion.llq_headers_offset);
1028
1029 io_sq->desc_addr.pbuf_dev_addr =
1030 (u8 __iomem *)((uintptr_t)ena_dev->mem_bar +
1031 cmd_completion.llq_descriptors_offset);
1032 }
1033
1034 pr_debug("created sq[%u], depth[%u]\n", io_sq->idx, io_sq->q_depth);
1035
1036 return ret;
1037 }
1038
1039 static int ena_com_ind_tbl_convert_to_device(struct ena_com_dev *ena_dev)
1040 {
1041 struct ena_rss *rss = &ena_dev->rss;
1042 struct ena_com_io_sq *io_sq;
1043 u16 qid;
1044 int i;
1045
1046 for (i = 0; i < 1 << rss->tbl_log_size; i++) {
1047 qid = rss->host_rss_ind_tbl[i];
1048 if (qid >= ENA_TOTAL_NUM_QUEUES)
1049 return -EINVAL;
1050
1051 io_sq = &ena_dev->io_sq_queues[qid];
1052
1053 if (io_sq->direction != ENA_COM_IO_QUEUE_DIRECTION_RX)
1054 return -EINVAL;
1055
1056 rss->rss_ind_tbl[i].cq_idx = io_sq->idx;
1057 }
1058
1059 return 0;
1060 }
1061
1062 static int ena_com_ind_tbl_convert_from_device(struct ena_com_dev *ena_dev)
1063 {
1064 u16 dev_idx_to_host_tbl[ENA_TOTAL_NUM_QUEUES] = { (u16)-1 };
1065 struct ena_rss *rss = &ena_dev->rss;
1066 u8 idx;
1067 u16 i;
1068
1069 for (i = 0; i < ENA_TOTAL_NUM_QUEUES; i++)
1070 dev_idx_to_host_tbl[ena_dev->io_sq_queues[i].idx] = i;
1071
1072 for (i = 0; i < 1 << rss->tbl_log_size; i++) {
1073 if (rss->rss_ind_tbl[i].cq_idx > ENA_TOTAL_NUM_QUEUES)
1074 return -EINVAL;
1075 idx = (u8)rss->rss_ind_tbl[i].cq_idx;
1076
1077 if (dev_idx_to_host_tbl[idx] > ENA_TOTAL_NUM_QUEUES)
1078 return -EINVAL;
1079
1080 rss->host_rss_ind_tbl[i] = dev_idx_to_host_tbl[idx];
1081 }
1082
1083 return 0;
1084 }
1085
1086 static int ena_com_init_interrupt_moderation_table(struct ena_com_dev *ena_dev)
1087 {
1088 size_t size;
1089
1090 size = sizeof(struct ena_intr_moder_entry) * ENA_INTR_MAX_NUM_OF_LEVELS;
1091
1092 ena_dev->intr_moder_tbl =
1093 devm_kzalloc(ena_dev->dmadev, size, GFP_KERNEL);
1094 if (!ena_dev->intr_moder_tbl)
1095 return -ENOMEM;
1096
1097 ena_com_config_default_interrupt_moderation_table(ena_dev);
1098
1099 return 0;
1100 }
1101
1102 static void ena_com_update_intr_delay_resolution(struct ena_com_dev *ena_dev,
1103 u16 intr_delay_resolution)
1104 {
1105 struct ena_intr_moder_entry *intr_moder_tbl = ena_dev->intr_moder_tbl;
1106 unsigned int i;
1107
1108 if (!intr_delay_resolution) {
1109 pr_err("Illegal intr_delay_resolution provided. Going to use default 1 usec resolution\n");
1110 intr_delay_resolution = 1;
1111 }
1112 ena_dev->intr_delay_resolution = intr_delay_resolution;
1113
1114 /* update Rx */
1115 for (i = 0; i < ENA_INTR_MAX_NUM_OF_LEVELS; i++)
1116 intr_moder_tbl[i].intr_moder_interval /= intr_delay_resolution;
1117
1118 /* update Tx */
1119 ena_dev->intr_moder_tx_interval /= intr_delay_resolution;
1120 }
1121
1122 /*****************************************************************************/
1123 /******************************* API ******************************/
1124 /*****************************************************************************/
1125
1126 int ena_com_execute_admin_command(struct ena_com_admin_queue *admin_queue,
1127 struct ena_admin_aq_entry *cmd,
1128 size_t cmd_size,
1129 struct ena_admin_acq_entry *comp,
1130 size_t comp_size)
1131 {
1132 struct ena_comp_ctx *comp_ctx;
1133 int ret;
1134
1135 comp_ctx = ena_com_submit_admin_cmd(admin_queue, cmd, cmd_size,
1136 comp, comp_size);
1137 if (IS_ERR(comp_ctx)) {
1138 if (comp_ctx == ERR_PTR(-ENODEV))
1139 pr_debug("Failed to submit command [%ld]\n",
1140 PTR_ERR(comp_ctx));
1141 else
1142 pr_err("Failed to submit command [%ld]\n",
1143 PTR_ERR(comp_ctx));
1144
1145 return PTR_ERR(comp_ctx);
1146 }
1147
1148 ret = ena_com_wait_and_process_admin_cq(comp_ctx, admin_queue);
1149 if (unlikely(ret)) {
1150 if (admin_queue->running_state)
1151 pr_err("Failed to process command. ret = %d\n", ret);
1152 else
1153 pr_debug("Failed to process command. ret = %d\n", ret);
1154 }
1155 return ret;
1156 }
1157
1158 int ena_com_create_io_cq(struct ena_com_dev *ena_dev,
1159 struct ena_com_io_cq *io_cq)
1160 {
1161 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1162 struct ena_admin_aq_create_cq_cmd create_cmd;
1163 struct ena_admin_acq_create_cq_resp_desc cmd_completion;
1164 int ret;
1165
1166 memset(&create_cmd, 0x0, sizeof(create_cmd));
1167
1168 create_cmd.aq_common_descriptor.opcode = ENA_ADMIN_CREATE_CQ;
1169
1170 create_cmd.cq_caps_2 |= (io_cq->cdesc_entry_size_in_bytes / 4) &
1171 ENA_ADMIN_AQ_CREATE_CQ_CMD_CQ_ENTRY_SIZE_WORDS_MASK;
1172 create_cmd.cq_caps_1 |=
1173 ENA_ADMIN_AQ_CREATE_CQ_CMD_INTERRUPT_MODE_ENABLED_MASK;
1174
1175 create_cmd.msix_vector = io_cq->msix_vector;
1176 create_cmd.cq_depth = io_cq->q_depth;
1177
1178 ret = ena_com_mem_addr_set(ena_dev,
1179 &create_cmd.cq_ba,
1180 io_cq->cdesc_addr.phys_addr);
1181 if (unlikely(ret)) {
1182 pr_err("memory address set failed\n");
1183 return ret;
1184 }
1185
1186 ret = ena_com_execute_admin_command(admin_queue,
1187 (struct ena_admin_aq_entry *)&create_cmd,
1188 sizeof(create_cmd),
1189 (struct ena_admin_acq_entry *)&cmd_completion,
1190 sizeof(cmd_completion));
1191 if (unlikely(ret)) {
1192 pr_err("Failed to create IO CQ. error: %d\n", ret);
1193 return ret;
1194 }
1195
1196 io_cq->idx = cmd_completion.cq_idx;
1197
1198 io_cq->unmask_reg = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1199 cmd_completion.cq_interrupt_unmask_register_offset);
1200
1201 if (cmd_completion.cq_head_db_register_offset)
1202 io_cq->cq_head_db_reg =
1203 (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1204 cmd_completion.cq_head_db_register_offset);
1205
1206 if (cmd_completion.numa_node_register_offset)
1207 io_cq->numa_node_cfg_reg =
1208 (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1209 cmd_completion.numa_node_register_offset);
1210
1211 pr_debug("created cq[%u], depth[%u]\n", io_cq->idx, io_cq->q_depth);
1212
1213 return ret;
1214 }
1215
1216 int ena_com_get_io_handlers(struct ena_com_dev *ena_dev, u16 qid,
1217 struct ena_com_io_sq **io_sq,
1218 struct ena_com_io_cq **io_cq)
1219 {
1220 if (qid >= ENA_TOTAL_NUM_QUEUES) {
1221 pr_err("Invalid queue number %d but the max is %d\n", qid,
1222 ENA_TOTAL_NUM_QUEUES);
1223 return -EINVAL;
1224 }
1225
1226 *io_sq = &ena_dev->io_sq_queues[qid];
1227 *io_cq = &ena_dev->io_cq_queues[qid];
1228
1229 return 0;
1230 }
1231
1232 void ena_com_abort_admin_commands(struct ena_com_dev *ena_dev)
1233 {
1234 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1235 struct ena_comp_ctx *comp_ctx;
1236 u16 i;
1237
1238 if (!admin_queue->comp_ctx)
1239 return;
1240
1241 for (i = 0; i < admin_queue->q_depth; i++) {
1242 comp_ctx = get_comp_ctxt(admin_queue, i, false);
1243 if (unlikely(!comp_ctx))
1244 break;
1245
1246 comp_ctx->status = ENA_CMD_ABORTED;
1247
1248 complete(&comp_ctx->wait_event);
1249 }
1250 }
1251
1252 void ena_com_wait_for_abort_completion(struct ena_com_dev *ena_dev)
1253 {
1254 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1255 unsigned long flags;
1256
1257 spin_lock_irqsave(&admin_queue->q_lock, flags);
1258 while (atomic_read(&admin_queue->outstanding_cmds) != 0) {
1259 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
1260 msleep(ENA_POLL_MS);
1261 spin_lock_irqsave(&admin_queue->q_lock, flags);
1262 }
1263 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
1264 }
1265
1266 int ena_com_destroy_io_cq(struct ena_com_dev *ena_dev,
1267 struct ena_com_io_cq *io_cq)
1268 {
1269 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1270 struct ena_admin_aq_destroy_cq_cmd destroy_cmd;
1271 struct ena_admin_acq_destroy_cq_resp_desc destroy_resp;
1272 int ret;
1273
1274 memset(&destroy_cmd, 0x0, sizeof(destroy_cmd));
1275
1276 destroy_cmd.cq_idx = io_cq->idx;
1277 destroy_cmd.aq_common_descriptor.opcode = ENA_ADMIN_DESTROY_CQ;
1278
1279 ret = ena_com_execute_admin_command(admin_queue,
1280 (struct ena_admin_aq_entry *)&destroy_cmd,
1281 sizeof(destroy_cmd),
1282 (struct ena_admin_acq_entry *)&destroy_resp,
1283 sizeof(destroy_resp));
1284
1285 if (unlikely(ret && (ret != -ENODEV)))
1286 pr_err("Failed to destroy IO CQ. error: %d\n", ret);
1287
1288 return ret;
1289 }
1290
1291 bool ena_com_get_admin_running_state(struct ena_com_dev *ena_dev)
1292 {
1293 return ena_dev->admin_queue.running_state;
1294 }
1295
1296 void ena_com_set_admin_running_state(struct ena_com_dev *ena_dev, bool state)
1297 {
1298 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1299 unsigned long flags;
1300
1301 spin_lock_irqsave(&admin_queue->q_lock, flags);
1302 ena_dev->admin_queue.running_state = state;
1303 spin_unlock_irqrestore(&admin_queue->q_lock, flags);
1304 }
1305
1306 void ena_com_admin_aenq_enable(struct ena_com_dev *ena_dev)
1307 {
1308 u16 depth = ena_dev->aenq.q_depth;
1309
1310 WARN(ena_dev->aenq.head != depth, "Invalid AENQ state\n");
1311
1312 /* Init head_db to mark that all entries in the queue
1313 * are initially available
1314 */
1315 writel(depth, ena_dev->reg_bar + ENA_REGS_AENQ_HEAD_DB_OFF);
1316 }
1317
1318 int ena_com_set_aenq_config(struct ena_com_dev *ena_dev, u32 groups_flag)
1319 {
1320 struct ena_com_admin_queue *admin_queue;
1321 struct ena_admin_set_feat_cmd cmd;
1322 struct ena_admin_set_feat_resp resp;
1323 struct ena_admin_get_feat_resp get_resp;
1324 int ret;
1325
1326 ret = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_AENQ_CONFIG);
1327 if (ret) {
1328 pr_info("Can't get aenq configuration\n");
1329 return ret;
1330 }
1331
1332 if ((get_resp.u.aenq.supported_groups & groups_flag) != groups_flag) {
1333 pr_warn("Trying to set unsupported aenq events. supported flag: %x asked flag: %x\n",
1334 get_resp.u.aenq.supported_groups, groups_flag);
1335 return -EOPNOTSUPP;
1336 }
1337
1338 memset(&cmd, 0x0, sizeof(cmd));
1339 admin_queue = &ena_dev->admin_queue;
1340
1341 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
1342 cmd.aq_common_descriptor.flags = 0;
1343 cmd.feat_common.feature_id = ENA_ADMIN_AENQ_CONFIG;
1344 cmd.u.aenq.enabled_groups = groups_flag;
1345
1346 ret = ena_com_execute_admin_command(admin_queue,
1347 (struct ena_admin_aq_entry *)&cmd,
1348 sizeof(cmd),
1349 (struct ena_admin_acq_entry *)&resp,
1350 sizeof(resp));
1351
1352 if (unlikely(ret))
1353 pr_err("Failed to config AENQ ret: %d\n", ret);
1354
1355 return ret;
1356 }
1357
1358 int ena_com_get_dma_width(struct ena_com_dev *ena_dev)
1359 {
1360 u32 caps = ena_com_reg_bar_read32(ena_dev, ENA_REGS_CAPS_OFF);
1361 int width;
1362
1363 if (unlikely(caps == ENA_MMIO_READ_TIMEOUT)) {
1364 pr_err("Reg read timeout occurred\n");
1365 return -ETIME;
1366 }
1367
1368 width = (caps & ENA_REGS_CAPS_DMA_ADDR_WIDTH_MASK) >>
1369 ENA_REGS_CAPS_DMA_ADDR_WIDTH_SHIFT;
1370
1371 pr_debug("ENA dma width: %d\n", width);
1372
1373 if ((width < 32) || width > ENA_MAX_PHYS_ADDR_SIZE_BITS) {
1374 pr_err("DMA width illegal value: %d\n", width);
1375 return -EINVAL;
1376 }
1377
1378 ena_dev->dma_addr_bits = width;
1379
1380 return width;
1381 }
1382
1383 int ena_com_validate_version(struct ena_com_dev *ena_dev)
1384 {
1385 u32 ver;
1386 u32 ctrl_ver;
1387 u32 ctrl_ver_masked;
1388
1389 /* Make sure the ENA version and the controller version are at least
1390 * as the driver expects
1391 */
1392 ver = ena_com_reg_bar_read32(ena_dev, ENA_REGS_VERSION_OFF);
1393 ctrl_ver = ena_com_reg_bar_read32(ena_dev,
1394 ENA_REGS_CONTROLLER_VERSION_OFF);
1395
1396 if (unlikely((ver == ENA_MMIO_READ_TIMEOUT) ||
1397 (ctrl_ver == ENA_MMIO_READ_TIMEOUT))) {
1398 pr_err("Reg read timeout occurred\n");
1399 return -ETIME;
1400 }
1401
1402 pr_info("ena device version: %d.%d\n",
1403 (ver & ENA_REGS_VERSION_MAJOR_VERSION_MASK) >>
1404 ENA_REGS_VERSION_MAJOR_VERSION_SHIFT,
1405 ver & ENA_REGS_VERSION_MINOR_VERSION_MASK);
1406
1407 if (ver < MIN_ENA_VER) {
1408 pr_err("ENA version is lower than the minimal version the driver supports\n");
1409 return -1;
1410 }
1411
1412 pr_info("ena controller version: %d.%d.%d implementation version %d\n",
1413 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_MASK) >>
1414 ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_SHIFT,
1415 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_MASK) >>
1416 ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_SHIFT,
1417 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_SUBMINOR_VERSION_MASK),
1418 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_IMPL_ID_MASK) >>
1419 ENA_REGS_CONTROLLER_VERSION_IMPL_ID_SHIFT);
1420
1421 ctrl_ver_masked =
1422 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_MASK) |
1423 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_MASK) |
1424 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_SUBMINOR_VERSION_MASK);
1425
1426 /* Validate the ctrl version without the implementation ID */
1427 if (ctrl_ver_masked < MIN_ENA_CTRL_VER) {
1428 pr_err("ENA ctrl version is lower than the minimal ctrl version the driver supports\n");
1429 return -1;
1430 }
1431
1432 return 0;
1433 }
1434
1435 void ena_com_admin_destroy(struct ena_com_dev *ena_dev)
1436 {
1437 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1438 struct ena_com_admin_cq *cq = &admin_queue->cq;
1439 struct ena_com_admin_sq *sq = &admin_queue->sq;
1440 struct ena_com_aenq *aenq = &ena_dev->aenq;
1441 u16 size;
1442
1443 if (admin_queue->comp_ctx)
1444 devm_kfree(ena_dev->dmadev, admin_queue->comp_ctx);
1445 admin_queue->comp_ctx = NULL;
1446 size = ADMIN_SQ_SIZE(admin_queue->q_depth);
1447 if (sq->entries)
1448 dma_free_coherent(ena_dev->dmadev, size, sq->entries,
1449 sq->dma_addr);
1450 sq->entries = NULL;
1451
1452 size = ADMIN_CQ_SIZE(admin_queue->q_depth);
1453 if (cq->entries)
1454 dma_free_coherent(ena_dev->dmadev, size, cq->entries,
1455 cq->dma_addr);
1456 cq->entries = NULL;
1457
1458 size = ADMIN_AENQ_SIZE(aenq->q_depth);
1459 if (ena_dev->aenq.entries)
1460 dma_free_coherent(ena_dev->dmadev, size, aenq->entries,
1461 aenq->dma_addr);
1462 aenq->entries = NULL;
1463 }
1464
1465 void ena_com_set_admin_polling_mode(struct ena_com_dev *ena_dev, bool polling)
1466 {
1467 u32 mask_value = 0;
1468
1469 if (polling)
1470 mask_value = ENA_REGS_ADMIN_INTR_MASK;
1471
1472 writel(mask_value, ena_dev->reg_bar + ENA_REGS_INTR_MASK_OFF);
1473 ena_dev->admin_queue.polling = polling;
1474 }
1475
1476 int ena_com_mmio_reg_read_request_init(struct ena_com_dev *ena_dev)
1477 {
1478 struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1479
1480 spin_lock_init(&mmio_read->lock);
1481 mmio_read->read_resp =
1482 dma_zalloc_coherent(ena_dev->dmadev,
1483 sizeof(*mmio_read->read_resp),
1484 &mmio_read->read_resp_dma_addr, GFP_KERNEL);
1485 if (unlikely(!mmio_read->read_resp))
1486 return -ENOMEM;
1487
1488 ena_com_mmio_reg_read_request_write_dev_addr(ena_dev);
1489
1490 mmio_read->read_resp->req_id = 0x0;
1491 mmio_read->seq_num = 0x0;
1492 mmio_read->readless_supported = true;
1493
1494 return 0;
1495 }
1496
1497 void ena_com_set_mmio_read_mode(struct ena_com_dev *ena_dev, bool readless_supported)
1498 {
1499 struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1500
1501 mmio_read->readless_supported = readless_supported;
1502 }
1503
1504 void ena_com_mmio_reg_read_request_destroy(struct ena_com_dev *ena_dev)
1505 {
1506 struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1507
1508 writel(0x0, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_LO_OFF);
1509 writel(0x0, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_HI_OFF);
1510
1511 dma_free_coherent(ena_dev->dmadev, sizeof(*mmio_read->read_resp),
1512 mmio_read->read_resp, mmio_read->read_resp_dma_addr);
1513
1514 mmio_read->read_resp = NULL;
1515 }
1516
1517 void ena_com_mmio_reg_read_request_write_dev_addr(struct ena_com_dev *ena_dev)
1518 {
1519 struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1520 u32 addr_low, addr_high;
1521
1522 addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(mmio_read->read_resp_dma_addr);
1523 addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(mmio_read->read_resp_dma_addr);
1524
1525 writel(addr_low, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_LO_OFF);
1526 writel(addr_high, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_HI_OFF);
1527 }
1528
1529 int ena_com_admin_init(struct ena_com_dev *ena_dev,
1530 struct ena_aenq_handlers *aenq_handlers,
1531 bool init_spinlock)
1532 {
1533 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1534 u32 aq_caps, acq_caps, dev_sts, addr_low, addr_high;
1535 int ret;
1536
1537 dev_sts = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
1538
1539 if (unlikely(dev_sts == ENA_MMIO_READ_TIMEOUT)) {
1540 pr_err("Reg read timeout occurred\n");
1541 return -ETIME;
1542 }
1543
1544 if (!(dev_sts & ENA_REGS_DEV_STS_READY_MASK)) {
1545 pr_err("Device isn't ready, abort com init\n");
1546 return -ENODEV;
1547 }
1548
1549 admin_queue->q_depth = ENA_ADMIN_QUEUE_DEPTH;
1550
1551 admin_queue->q_dmadev = ena_dev->dmadev;
1552 admin_queue->polling = false;
1553 admin_queue->curr_cmd_id = 0;
1554
1555 atomic_set(&admin_queue->outstanding_cmds, 0);
1556
1557 if (init_spinlock)
1558 spin_lock_init(&admin_queue->q_lock);
1559
1560 ret = ena_com_init_comp_ctxt(admin_queue);
1561 if (ret)
1562 goto error;
1563
1564 ret = ena_com_admin_init_sq(admin_queue);
1565 if (ret)
1566 goto error;
1567
1568 ret = ena_com_admin_init_cq(admin_queue);
1569 if (ret)
1570 goto error;
1571
1572 admin_queue->sq.db_addr = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1573 ENA_REGS_AQ_DB_OFF);
1574
1575 addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(admin_queue->sq.dma_addr);
1576 addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(admin_queue->sq.dma_addr);
1577
1578 writel(addr_low, ena_dev->reg_bar + ENA_REGS_AQ_BASE_LO_OFF);
1579 writel(addr_high, ena_dev->reg_bar + ENA_REGS_AQ_BASE_HI_OFF);
1580
1581 addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(admin_queue->cq.dma_addr);
1582 addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(admin_queue->cq.dma_addr);
1583
1584 writel(addr_low, ena_dev->reg_bar + ENA_REGS_ACQ_BASE_LO_OFF);
1585 writel(addr_high, ena_dev->reg_bar + ENA_REGS_ACQ_BASE_HI_OFF);
1586
1587 aq_caps = 0;
1588 aq_caps |= admin_queue->q_depth & ENA_REGS_AQ_CAPS_AQ_DEPTH_MASK;
1589 aq_caps |= (sizeof(struct ena_admin_aq_entry) <<
1590 ENA_REGS_AQ_CAPS_AQ_ENTRY_SIZE_SHIFT) &
1591 ENA_REGS_AQ_CAPS_AQ_ENTRY_SIZE_MASK;
1592
1593 acq_caps = 0;
1594 acq_caps |= admin_queue->q_depth & ENA_REGS_ACQ_CAPS_ACQ_DEPTH_MASK;
1595 acq_caps |= (sizeof(struct ena_admin_acq_entry) <<
1596 ENA_REGS_ACQ_CAPS_ACQ_ENTRY_SIZE_SHIFT) &
1597 ENA_REGS_ACQ_CAPS_ACQ_ENTRY_SIZE_MASK;
1598
1599 writel(aq_caps, ena_dev->reg_bar + ENA_REGS_AQ_CAPS_OFF);
1600 writel(acq_caps, ena_dev->reg_bar + ENA_REGS_ACQ_CAPS_OFF);
1601 ret = ena_com_admin_init_aenq(ena_dev, aenq_handlers);
1602 if (ret)
1603 goto error;
1604
1605 admin_queue->running_state = true;
1606
1607 return 0;
1608 error:
1609 ena_com_admin_destroy(ena_dev);
1610
1611 return ret;
1612 }
1613
1614 int ena_com_create_io_queue(struct ena_com_dev *ena_dev,
1615 struct ena_com_create_io_ctx *ctx)
1616 {
1617 struct ena_com_io_sq *io_sq;
1618 struct ena_com_io_cq *io_cq;
1619 int ret;
1620
1621 if (ctx->qid >= ENA_TOTAL_NUM_QUEUES) {
1622 pr_err("Qid (%d) is bigger than max num of queues (%d)\n",
1623 ctx->qid, ENA_TOTAL_NUM_QUEUES);
1624 return -EINVAL;
1625 }
1626
1627 io_sq = &ena_dev->io_sq_queues[ctx->qid];
1628 io_cq = &ena_dev->io_cq_queues[ctx->qid];
1629
1630 memset(io_sq, 0x0, sizeof(*io_sq));
1631 memset(io_cq, 0x0, sizeof(*io_cq));
1632
1633 /* Init CQ */
1634 io_cq->q_depth = ctx->queue_size;
1635 io_cq->direction = ctx->direction;
1636 io_cq->qid = ctx->qid;
1637
1638 io_cq->msix_vector = ctx->msix_vector;
1639
1640 io_sq->q_depth = ctx->queue_size;
1641 io_sq->direction = ctx->direction;
1642 io_sq->qid = ctx->qid;
1643
1644 io_sq->mem_queue_type = ctx->mem_queue_type;
1645
1646 if (ctx->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
1647 /* header length is limited to 8 bits */
1648 io_sq->tx_max_header_size =
1649 min_t(u32, ena_dev->tx_max_header_size, SZ_256);
1650
1651 ret = ena_com_init_io_sq(ena_dev, ctx, io_sq);
1652 if (ret)
1653 goto error;
1654 ret = ena_com_init_io_cq(ena_dev, ctx, io_cq);
1655 if (ret)
1656 goto error;
1657
1658 ret = ena_com_create_io_cq(ena_dev, io_cq);
1659 if (ret)
1660 goto error;
1661
1662 ret = ena_com_create_io_sq(ena_dev, io_sq, io_cq->idx);
1663 if (ret)
1664 goto destroy_io_cq;
1665
1666 return 0;
1667
1668 destroy_io_cq:
1669 ena_com_destroy_io_cq(ena_dev, io_cq);
1670 error:
1671 ena_com_io_queue_free(ena_dev, io_sq, io_cq);
1672 return ret;
1673 }
1674
1675 void ena_com_destroy_io_queue(struct ena_com_dev *ena_dev, u16 qid)
1676 {
1677 struct ena_com_io_sq *io_sq;
1678 struct ena_com_io_cq *io_cq;
1679
1680 if (qid >= ENA_TOTAL_NUM_QUEUES) {
1681 pr_err("Qid (%d) is bigger than max num of queues (%d)\n", qid,
1682 ENA_TOTAL_NUM_QUEUES);
1683 return;
1684 }
1685
1686 io_sq = &ena_dev->io_sq_queues[qid];
1687 io_cq = &ena_dev->io_cq_queues[qid];
1688
1689 ena_com_destroy_io_sq(ena_dev, io_sq);
1690 ena_com_destroy_io_cq(ena_dev, io_cq);
1691
1692 ena_com_io_queue_free(ena_dev, io_sq, io_cq);
1693 }
1694
1695 int ena_com_get_link_params(struct ena_com_dev *ena_dev,
1696 struct ena_admin_get_feat_resp *resp)
1697 {
1698 return ena_com_get_feature(ena_dev, resp, ENA_ADMIN_LINK_CONFIG);
1699 }
1700
1701 int ena_com_get_dev_attr_feat(struct ena_com_dev *ena_dev,
1702 struct ena_com_dev_get_features_ctx *get_feat_ctx)
1703 {
1704 struct ena_admin_get_feat_resp get_resp;
1705 int rc;
1706
1707 rc = ena_com_get_feature(ena_dev, &get_resp,
1708 ENA_ADMIN_DEVICE_ATTRIBUTES);
1709 if (rc)
1710 return rc;
1711
1712 memcpy(&get_feat_ctx->dev_attr, &get_resp.u.dev_attr,
1713 sizeof(get_resp.u.dev_attr));
1714 ena_dev->supported_features = get_resp.u.dev_attr.supported_features;
1715
1716 rc = ena_com_get_feature(ena_dev, &get_resp,
1717 ENA_ADMIN_MAX_QUEUES_NUM);
1718 if (rc)
1719 return rc;
1720
1721 memcpy(&get_feat_ctx->max_queues, &get_resp.u.max_queue,
1722 sizeof(get_resp.u.max_queue));
1723 ena_dev->tx_max_header_size = get_resp.u.max_queue.max_header_size;
1724
1725 rc = ena_com_get_feature(ena_dev, &get_resp,
1726 ENA_ADMIN_AENQ_CONFIG);
1727 if (rc)
1728 return rc;
1729
1730 memcpy(&get_feat_ctx->aenq, &get_resp.u.aenq,
1731 sizeof(get_resp.u.aenq));
1732
1733 rc = ena_com_get_feature(ena_dev, &get_resp,
1734 ENA_ADMIN_STATELESS_OFFLOAD_CONFIG);
1735 if (rc)
1736 return rc;
1737
1738 memcpy(&get_feat_ctx->offload, &get_resp.u.offload,
1739 sizeof(get_resp.u.offload));
1740
1741 /* Driver hints isn't mandatory admin command. So in case the
1742 * command isn't supported set driver hints to 0
1743 */
1744 rc = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_HW_HINTS);
1745
1746 if (!rc)
1747 memcpy(&get_feat_ctx->hw_hints, &get_resp.u.hw_hints,
1748 sizeof(get_resp.u.hw_hints));
1749 else if (rc == -EOPNOTSUPP)
1750 memset(&get_feat_ctx->hw_hints, 0x0,
1751 sizeof(get_feat_ctx->hw_hints));
1752 else
1753 return rc;
1754
1755 return 0;
1756 }
1757
1758 void ena_com_admin_q_comp_intr_handler(struct ena_com_dev *ena_dev)
1759 {
1760 ena_com_handle_admin_completion(&ena_dev->admin_queue);
1761 }
1762
1763 /* ena_handle_specific_aenq_event:
1764 * return the handler that is relevant to the specific event group
1765 */
1766 static ena_aenq_handler ena_com_get_specific_aenq_cb(struct ena_com_dev *dev,
1767 u16 group)
1768 {
1769 struct ena_aenq_handlers *aenq_handlers = dev->aenq.aenq_handlers;
1770
1771 if ((group < ENA_MAX_HANDLERS) && aenq_handlers->handlers[group])
1772 return aenq_handlers->handlers[group];
1773
1774 return aenq_handlers->unimplemented_handler;
1775 }
1776
1777 /* ena_aenq_intr_handler:
1778 * handles the aenq incoming events.
1779 * pop events from the queue and apply the specific handler
1780 */
1781 void ena_com_aenq_intr_handler(struct ena_com_dev *dev, void *data)
1782 {
1783 struct ena_admin_aenq_entry *aenq_e;
1784 struct ena_admin_aenq_common_desc *aenq_common;
1785 struct ena_com_aenq *aenq = &dev->aenq;
1786 ena_aenq_handler handler_cb;
1787 u16 masked_head, processed = 0;
1788 u8 phase;
1789
1790 masked_head = aenq->head & (aenq->q_depth - 1);
1791 phase = aenq->phase;
1792 aenq_e = &aenq->entries[masked_head]; /* Get first entry */
1793 aenq_common = &aenq_e->aenq_common_desc;
1794
1795 /* Go over all the events */
1796 while ((aenq_common->flags & ENA_ADMIN_AENQ_COMMON_DESC_PHASE_MASK) ==
1797 phase) {
1798 pr_debug("AENQ! Group[%x] Syndrom[%x] timestamp: [%llus]\n",
1799 aenq_common->group, aenq_common->syndrom,
1800 (u64)aenq_common->timestamp_low +
1801 ((u64)aenq_common->timestamp_high << 32));
1802
1803 /* Handle specific event*/
1804 handler_cb = ena_com_get_specific_aenq_cb(dev,
1805 aenq_common->group);
1806 handler_cb(data, aenq_e); /* call the actual event handler*/
1807
1808 /* Get next event entry */
1809 masked_head++;
1810 processed++;
1811
1812 if (unlikely(masked_head == aenq->q_depth)) {
1813 masked_head = 0;
1814 phase = !phase;
1815 }
1816 aenq_e = &aenq->entries[masked_head];
1817 aenq_common = &aenq_e->aenq_common_desc;
1818 }
1819
1820 aenq->head += processed;
1821 aenq->phase = phase;
1822
1823 /* Don't update aenq doorbell if there weren't any processed events */
1824 if (!processed)
1825 return;
1826
1827 /* write the aenq doorbell after all AENQ descriptors were read */
1828 mb();
1829 writel((u32)aenq->head, dev->reg_bar + ENA_REGS_AENQ_HEAD_DB_OFF);
1830 }
1831
1832 int ena_com_dev_reset(struct ena_com_dev *ena_dev,
1833 enum ena_regs_reset_reason_types reset_reason)
1834 {
1835 u32 stat, timeout, cap, reset_val;
1836 int rc;
1837
1838 stat = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
1839 cap = ena_com_reg_bar_read32(ena_dev, ENA_REGS_CAPS_OFF);
1840
1841 if (unlikely((stat == ENA_MMIO_READ_TIMEOUT) ||
1842 (cap == ENA_MMIO_READ_TIMEOUT))) {
1843 pr_err("Reg read32 timeout occurred\n");
1844 return -ETIME;
1845 }
1846
1847 if ((stat & ENA_REGS_DEV_STS_READY_MASK) == 0) {
1848 pr_err("Device isn't ready, can't reset device\n");
1849 return -EINVAL;
1850 }
1851
1852 timeout = (cap & ENA_REGS_CAPS_RESET_TIMEOUT_MASK) >>
1853 ENA_REGS_CAPS_RESET_TIMEOUT_SHIFT;
1854 if (timeout == 0) {
1855 pr_err("Invalid timeout value\n");
1856 return -EINVAL;
1857 }
1858
1859 /* start reset */
1860 reset_val = ENA_REGS_DEV_CTL_DEV_RESET_MASK;
1861 reset_val |= (reset_reason << ENA_REGS_DEV_CTL_RESET_REASON_SHIFT) &
1862 ENA_REGS_DEV_CTL_RESET_REASON_MASK;
1863 writel(reset_val, ena_dev->reg_bar + ENA_REGS_DEV_CTL_OFF);
1864
1865 /* Write again the MMIO read request address */
1866 ena_com_mmio_reg_read_request_write_dev_addr(ena_dev);
1867
1868 rc = wait_for_reset_state(ena_dev, timeout,
1869 ENA_REGS_DEV_STS_RESET_IN_PROGRESS_MASK);
1870 if (rc != 0) {
1871 pr_err("Reset indication didn't turn on\n");
1872 return rc;
1873 }
1874
1875 /* reset done */
1876 writel(0, ena_dev->reg_bar + ENA_REGS_DEV_CTL_OFF);
1877 rc = wait_for_reset_state(ena_dev, timeout, 0);
1878 if (rc != 0) {
1879 pr_err("Reset indication didn't turn off\n");
1880 return rc;
1881 }
1882
1883 timeout = (cap & ENA_REGS_CAPS_ADMIN_CMD_TO_MASK) >>
1884 ENA_REGS_CAPS_ADMIN_CMD_TO_SHIFT;
1885 if (timeout)
1886 /* the resolution of timeout reg is 100ms */
1887 ena_dev->admin_queue.completion_timeout = timeout * 100000;
1888 else
1889 ena_dev->admin_queue.completion_timeout = ADMIN_CMD_TIMEOUT_US;
1890
1891 return 0;
1892 }
1893
1894 static int ena_get_dev_stats(struct ena_com_dev *ena_dev,
1895 struct ena_com_stats_ctx *ctx,
1896 enum ena_admin_get_stats_type type)
1897 {
1898 struct ena_admin_aq_get_stats_cmd *get_cmd = &ctx->get_cmd;
1899 struct ena_admin_acq_get_stats_resp *get_resp = &ctx->get_resp;
1900 struct ena_com_admin_queue *admin_queue;
1901 int ret;
1902
1903 admin_queue = &ena_dev->admin_queue;
1904
1905 get_cmd->aq_common_descriptor.opcode = ENA_ADMIN_GET_STATS;
1906 get_cmd->aq_common_descriptor.flags = 0;
1907 get_cmd->type = type;
1908
1909 ret = ena_com_execute_admin_command(admin_queue,
1910 (struct ena_admin_aq_entry *)get_cmd,
1911 sizeof(*get_cmd),
1912 (struct ena_admin_acq_entry *)get_resp,
1913 sizeof(*get_resp));
1914
1915 if (unlikely(ret))
1916 pr_err("Failed to get stats. error: %d\n", ret);
1917
1918 return ret;
1919 }
1920
1921 int ena_com_get_dev_basic_stats(struct ena_com_dev *ena_dev,
1922 struct ena_admin_basic_stats *stats)
1923 {
1924 struct ena_com_stats_ctx ctx;
1925 int ret;
1926
1927 memset(&ctx, 0x0, sizeof(ctx));
1928 ret = ena_get_dev_stats(ena_dev, &ctx, ENA_ADMIN_GET_STATS_TYPE_BASIC);
1929 if (likely(ret == 0))
1930 memcpy(stats, &ctx.get_resp.basic_stats,
1931 sizeof(ctx.get_resp.basic_stats));
1932
1933 return ret;
1934 }
1935
1936 int ena_com_set_dev_mtu(struct ena_com_dev *ena_dev, int mtu)
1937 {
1938 struct ena_com_admin_queue *admin_queue;
1939 struct ena_admin_set_feat_cmd cmd;
1940 struct ena_admin_set_feat_resp resp;
1941 int ret;
1942
1943 if (!ena_com_check_supported_feature_id(ena_dev, ENA_ADMIN_MTU)) {
1944 pr_debug("Feature %d isn't supported\n", ENA_ADMIN_MTU);
1945 return -EOPNOTSUPP;
1946 }
1947
1948 memset(&cmd, 0x0, sizeof(cmd));
1949 admin_queue = &ena_dev->admin_queue;
1950
1951 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
1952 cmd.aq_common_descriptor.flags = 0;
1953 cmd.feat_common.feature_id = ENA_ADMIN_MTU;
1954 cmd.u.mtu.mtu = mtu;
1955
1956 ret = ena_com_execute_admin_command(admin_queue,
1957 (struct ena_admin_aq_entry *)&cmd,
1958 sizeof(cmd),
1959 (struct ena_admin_acq_entry *)&resp,
1960 sizeof(resp));
1961
1962 if (unlikely(ret))
1963 pr_err("Failed to set mtu %d. error: %d\n", mtu, ret);
1964
1965 return ret;
1966 }
1967
1968 int ena_com_get_offload_settings(struct ena_com_dev *ena_dev,
1969 struct ena_admin_feature_offload_desc *offload)
1970 {
1971 int ret;
1972 struct ena_admin_get_feat_resp resp;
1973
1974 ret = ena_com_get_feature(ena_dev, &resp,
1975 ENA_ADMIN_STATELESS_OFFLOAD_CONFIG);
1976 if (unlikely(ret)) {
1977 pr_err("Failed to get offload capabilities %d\n", ret);
1978 return ret;
1979 }
1980
1981 memcpy(offload, &resp.u.offload, sizeof(resp.u.offload));
1982
1983 return 0;
1984 }
1985
1986 int ena_com_set_hash_function(struct ena_com_dev *ena_dev)
1987 {
1988 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1989 struct ena_rss *rss = &ena_dev->rss;
1990 struct ena_admin_set_feat_cmd cmd;
1991 struct ena_admin_set_feat_resp resp;
1992 struct ena_admin_get_feat_resp get_resp;
1993 int ret;
1994
1995 if (!ena_com_check_supported_feature_id(ena_dev,
1996 ENA_ADMIN_RSS_HASH_FUNCTION)) {
1997 pr_debug("Feature %d isn't supported\n",
1998 ENA_ADMIN_RSS_HASH_FUNCTION);
1999 return -EOPNOTSUPP;
2000 }
2001
2002 /* Validate hash function is supported */
2003 ret = ena_com_get_feature(ena_dev, &get_resp,
2004 ENA_ADMIN_RSS_HASH_FUNCTION);
2005 if (unlikely(ret))
2006 return ret;
2007
2008 if (get_resp.u.flow_hash_func.supported_func & (1 << rss->hash_func)) {
2009 pr_err("Func hash %d isn't supported by device, abort\n",
2010 rss->hash_func);
2011 return -EOPNOTSUPP;
2012 }
2013
2014 memset(&cmd, 0x0, sizeof(cmd));
2015
2016 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2017 cmd.aq_common_descriptor.flags =
2018 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
2019 cmd.feat_common.feature_id = ENA_ADMIN_RSS_HASH_FUNCTION;
2020 cmd.u.flow_hash_func.init_val = rss->hash_init_val;
2021 cmd.u.flow_hash_func.selected_func = 1 << rss->hash_func;
2022
2023 ret = ena_com_mem_addr_set(ena_dev,
2024 &cmd.control_buffer.address,
2025 rss->hash_key_dma_addr);
2026 if (unlikely(ret)) {
2027 pr_err("memory address set failed\n");
2028 return ret;
2029 }
2030
2031 cmd.control_buffer.length = sizeof(*rss->hash_key);
2032
2033 ret = ena_com_execute_admin_command(admin_queue,
2034 (struct ena_admin_aq_entry *)&cmd,
2035 sizeof(cmd),
2036 (struct ena_admin_acq_entry *)&resp,
2037 sizeof(resp));
2038 if (unlikely(ret)) {
2039 pr_err("Failed to set hash function %d. error: %d\n",
2040 rss->hash_func, ret);
2041 return -EINVAL;
2042 }
2043
2044 return 0;
2045 }
2046
2047 int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
2048 enum ena_admin_hash_functions func,
2049 const u8 *key, u16 key_len, u32 init_val)
2050 {
2051 struct ena_rss *rss = &ena_dev->rss;
2052 struct ena_admin_get_feat_resp get_resp;
2053 struct ena_admin_feature_rss_flow_hash_control *hash_key =
2054 rss->hash_key;
2055 int rc;
2056
2057 /* Make sure size is a mult of DWs */
2058 if (unlikely(key_len & 0x3))
2059 return -EINVAL;
2060
2061 rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2062 ENA_ADMIN_RSS_HASH_FUNCTION,
2063 rss->hash_key_dma_addr,
2064 sizeof(*rss->hash_key));
2065 if (unlikely(rc))
2066 return rc;
2067
2068 if (!((1 << func) & get_resp.u.flow_hash_func.supported_func)) {
2069 pr_err("Flow hash function %d isn't supported\n", func);
2070 return -EOPNOTSUPP;
2071 }
2072
2073 switch (func) {
2074 case ENA_ADMIN_TOEPLITZ:
2075 if (key_len > sizeof(hash_key->key)) {
2076 pr_err("key len (%hu) is bigger than the max supported (%zu)\n",
2077 key_len, sizeof(hash_key->key));
2078 return -EINVAL;
2079 }
2080
2081 memcpy(hash_key->key, key, key_len);
2082 rss->hash_init_val = init_val;
2083 hash_key->keys_num = key_len >> 2;
2084 break;
2085 case ENA_ADMIN_CRC32:
2086 rss->hash_init_val = init_val;
2087 break;
2088 default:
2089 pr_err("Invalid hash function (%d)\n", func);
2090 return -EINVAL;
2091 }
2092
2093 rc = ena_com_set_hash_function(ena_dev);
2094
2095 /* Restore the old function */
2096 if (unlikely(rc))
2097 ena_com_get_hash_function(ena_dev, NULL, NULL);
2098
2099 return rc;
2100 }
2101
2102 int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
2103 enum ena_admin_hash_functions *func,
2104 u8 *key)
2105 {
2106 struct ena_rss *rss = &ena_dev->rss;
2107 struct ena_admin_get_feat_resp get_resp;
2108 struct ena_admin_feature_rss_flow_hash_control *hash_key =
2109 rss->hash_key;
2110 int rc;
2111
2112 rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2113 ENA_ADMIN_RSS_HASH_FUNCTION,
2114 rss->hash_key_dma_addr,
2115 sizeof(*rss->hash_key));
2116 if (unlikely(rc))
2117 return rc;
2118
2119 rss->hash_func = get_resp.u.flow_hash_func.selected_func;
2120 if (func)
2121 *func = rss->hash_func;
2122
2123 if (key)
2124 memcpy(key, hash_key->key, (size_t)(hash_key->keys_num) << 2);
2125
2126 return 0;
2127 }
2128
2129 int ena_com_get_hash_ctrl(struct ena_com_dev *ena_dev,
2130 enum ena_admin_flow_hash_proto proto,
2131 u16 *fields)
2132 {
2133 struct ena_rss *rss = &ena_dev->rss;
2134 struct ena_admin_get_feat_resp get_resp;
2135 int rc;
2136
2137 rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2138 ENA_ADMIN_RSS_HASH_INPUT,
2139 rss->hash_ctrl_dma_addr,
2140 sizeof(*rss->hash_ctrl));
2141 if (unlikely(rc))
2142 return rc;
2143
2144 if (fields)
2145 *fields = rss->hash_ctrl->selected_fields[proto].fields;
2146
2147 return 0;
2148 }
2149
2150 int ena_com_set_hash_ctrl(struct ena_com_dev *ena_dev)
2151 {
2152 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
2153 struct ena_rss *rss = &ena_dev->rss;
2154 struct ena_admin_feature_rss_hash_control *hash_ctrl = rss->hash_ctrl;
2155 struct ena_admin_set_feat_cmd cmd;
2156 struct ena_admin_set_feat_resp resp;
2157 int ret;
2158
2159 if (!ena_com_check_supported_feature_id(ena_dev,
2160 ENA_ADMIN_RSS_HASH_INPUT)) {
2161 pr_debug("Feature %d isn't supported\n",
2162 ENA_ADMIN_RSS_HASH_INPUT);
2163 return -EOPNOTSUPP;
2164 }
2165
2166 memset(&cmd, 0x0, sizeof(cmd));
2167
2168 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2169 cmd.aq_common_descriptor.flags =
2170 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
2171 cmd.feat_common.feature_id = ENA_ADMIN_RSS_HASH_INPUT;
2172 cmd.u.flow_hash_input.enabled_input_sort =
2173 ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L3_SORT_MASK |
2174 ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L4_SORT_MASK;
2175
2176 ret = ena_com_mem_addr_set(ena_dev,
2177 &cmd.control_buffer.address,
2178 rss->hash_ctrl_dma_addr);
2179 if (unlikely(ret)) {
2180 pr_err("memory address set failed\n");
2181 return ret;
2182 }
2183 cmd.control_buffer.length = sizeof(*hash_ctrl);
2184
2185 ret = ena_com_execute_admin_command(admin_queue,
2186 (struct ena_admin_aq_entry *)&cmd,
2187 sizeof(cmd),
2188 (struct ena_admin_acq_entry *)&resp,
2189 sizeof(resp));
2190 if (unlikely(ret))
2191 pr_err("Failed to set hash input. error: %d\n", ret);
2192
2193 return ret;
2194 }
2195
2196 int ena_com_set_default_hash_ctrl(struct ena_com_dev *ena_dev)
2197 {
2198 struct ena_rss *rss = &ena_dev->rss;
2199 struct ena_admin_feature_rss_hash_control *hash_ctrl =
2200 rss->hash_ctrl;
2201 u16 available_fields = 0;
2202 int rc, i;
2203
2204 /* Get the supported hash input */
2205 rc = ena_com_get_hash_ctrl(ena_dev, 0, NULL);
2206 if (unlikely(rc))
2207 return rc;
2208
2209 hash_ctrl->selected_fields[ENA_ADMIN_RSS_TCP4].fields =
2210 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2211 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2212
2213 hash_ctrl->selected_fields[ENA_ADMIN_RSS_UDP4].fields =
2214 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2215 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2216
2217 hash_ctrl->selected_fields[ENA_ADMIN_RSS_TCP6].fields =
2218 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2219 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2220
2221 hash_ctrl->selected_fields[ENA_ADMIN_RSS_UDP6].fields =
2222 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2223 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2224
2225 hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP4].fields =
2226 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
2227
2228 hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP6].fields =
2229 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
2230
2231 hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP4_FRAG].fields =
2232 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
2233
2234 hash_ctrl->selected_fields[ENA_ADMIN_RSS_NOT_IP].fields =
2235 ENA_ADMIN_RSS_L2_DA | ENA_ADMIN_RSS_L2_SA;
2236
2237 for (i = 0; i < ENA_ADMIN_RSS_PROTO_NUM; i++) {
2238 available_fields = hash_ctrl->selected_fields[i].fields &
2239 hash_ctrl->supported_fields[i].fields;
2240 if (available_fields != hash_ctrl->selected_fields[i].fields) {
2241 pr_err("hash control doesn't support all the desire configuration. proto %x supported %x selected %x\n",
2242 i, hash_ctrl->supported_fields[i].fields,
2243 hash_ctrl->selected_fields[i].fields);
2244 return -EOPNOTSUPP;
2245 }
2246 }
2247
2248 rc = ena_com_set_hash_ctrl(ena_dev);
2249
2250 /* In case of failure, restore the old hash ctrl */
2251 if (unlikely(rc))
2252 ena_com_get_hash_ctrl(ena_dev, 0, NULL);
2253
2254 return rc;
2255 }
2256
2257 int ena_com_fill_hash_ctrl(struct ena_com_dev *ena_dev,
2258 enum ena_admin_flow_hash_proto proto,
2259 u16 hash_fields)
2260 {
2261 struct ena_rss *rss = &ena_dev->rss;
2262 struct ena_admin_feature_rss_hash_control *hash_ctrl = rss->hash_ctrl;
2263 u16 supported_fields;
2264 int rc;
2265
2266 if (proto >= ENA_ADMIN_RSS_PROTO_NUM) {
2267 pr_err("Invalid proto num (%u)\n", proto);
2268 return -EINVAL;
2269 }
2270
2271 /* Get the ctrl table */
2272 rc = ena_com_get_hash_ctrl(ena_dev, proto, NULL);
2273 if (unlikely(rc))
2274 return rc;
2275
2276 /* Make sure all the fields are supported */
2277 supported_fields = hash_ctrl->supported_fields[proto].fields;
2278 if ((hash_fields & supported_fields) != hash_fields) {
2279 pr_err("proto %d doesn't support the required fields %x. supports only: %x\n",
2280 proto, hash_fields, supported_fields);
2281 }
2282
2283 hash_ctrl->selected_fields[proto].fields = hash_fields;
2284
2285 rc = ena_com_set_hash_ctrl(ena_dev);
2286
2287 /* In case of failure, restore the old hash ctrl */
2288 if (unlikely(rc))
2289 ena_com_get_hash_ctrl(ena_dev, 0, NULL);
2290
2291 return 0;
2292 }
2293
2294 int ena_com_indirect_table_fill_entry(struct ena_com_dev *ena_dev,
2295 u16 entry_idx, u16 entry_value)
2296 {
2297 struct ena_rss *rss = &ena_dev->rss;
2298
2299 if (unlikely(entry_idx >= (1 << rss->tbl_log_size)))
2300 return -EINVAL;
2301
2302 if (unlikely((entry_value > ENA_TOTAL_NUM_QUEUES)))
2303 return -EINVAL;
2304
2305 rss->host_rss_ind_tbl[entry_idx] = entry_value;
2306
2307 return 0;
2308 }
2309
2310 int ena_com_indirect_table_set(struct ena_com_dev *ena_dev)
2311 {
2312 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
2313 struct ena_rss *rss = &ena_dev->rss;
2314 struct ena_admin_set_feat_cmd cmd;
2315 struct ena_admin_set_feat_resp resp;
2316 int ret;
2317
2318 if (!ena_com_check_supported_feature_id(
2319 ena_dev, ENA_ADMIN_RSS_REDIRECTION_TABLE_CONFIG)) {
2320 pr_debug("Feature %d isn't supported\n",
2321 ENA_ADMIN_RSS_REDIRECTION_TABLE_CONFIG);
2322 return -EOPNOTSUPP;
2323 }
2324
2325 ret = ena_com_ind_tbl_convert_to_device(ena_dev);
2326 if (ret) {
2327 pr_err("Failed to convert host indirection table to device table\n");
2328 return ret;
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_REDIRECTION_TABLE_CONFIG;
2337 cmd.u.ind_table.size = rss->tbl_log_size;
2338 cmd.u.ind_table.inline_index = 0xFFFFFFFF;
2339
2340 ret = ena_com_mem_addr_set(ena_dev,
2341 &cmd.control_buffer.address,
2342 rss->rss_ind_tbl_dma_addr);
2343 if (unlikely(ret)) {
2344 pr_err("memory address set failed\n");
2345 return ret;
2346 }
2347
2348 cmd.control_buffer.length = (1ULL << rss->tbl_log_size) *
2349 sizeof(struct ena_admin_rss_ind_table_entry);
2350
2351 ret = ena_com_execute_admin_command(admin_queue,
2352 (struct ena_admin_aq_entry *)&cmd,
2353 sizeof(cmd),
2354 (struct ena_admin_acq_entry *)&resp,
2355 sizeof(resp));
2356
2357 if (unlikely(ret))
2358 pr_err("Failed to set indirect table. error: %d\n", ret);
2359
2360 return ret;
2361 }
2362
2363 int ena_com_indirect_table_get(struct ena_com_dev *ena_dev, u32 *ind_tbl)
2364 {
2365 struct ena_rss *rss = &ena_dev->rss;
2366 struct ena_admin_get_feat_resp get_resp;
2367 u32 tbl_size;
2368 int i, rc;
2369
2370 tbl_size = (1ULL << rss->tbl_log_size) *
2371 sizeof(struct ena_admin_rss_ind_table_entry);
2372
2373 rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2374 ENA_ADMIN_RSS_REDIRECTION_TABLE_CONFIG,
2375 rss->rss_ind_tbl_dma_addr,
2376 tbl_size);
2377 if (unlikely(rc))
2378 return rc;
2379
2380 if (!ind_tbl)
2381 return 0;
2382
2383 rc = ena_com_ind_tbl_convert_from_device(ena_dev);
2384 if (unlikely(rc))
2385 return rc;
2386
2387 for (i = 0; i < (1 << rss->tbl_log_size); i++)
2388 ind_tbl[i] = rss->host_rss_ind_tbl[i];
2389
2390 return 0;
2391 }
2392
2393 int ena_com_rss_init(struct ena_com_dev *ena_dev, u16 indr_tbl_log_size)
2394 {
2395 int rc;
2396
2397 memset(&ena_dev->rss, 0x0, sizeof(ena_dev->rss));
2398
2399 rc = ena_com_indirect_table_allocate(ena_dev, indr_tbl_log_size);
2400 if (unlikely(rc))
2401 goto err_indr_tbl;
2402
2403 rc = ena_com_hash_key_allocate(ena_dev);
2404 if (unlikely(rc))
2405 goto err_hash_key;
2406
2407 rc = ena_com_hash_ctrl_init(ena_dev);
2408 if (unlikely(rc))
2409 goto err_hash_ctrl;
2410
2411 return 0;
2412
2413 err_hash_ctrl:
2414 ena_com_hash_key_destroy(ena_dev);
2415 err_hash_key:
2416 ena_com_indirect_table_destroy(ena_dev);
2417 err_indr_tbl:
2418
2419 return rc;
2420 }
2421
2422 void ena_com_rss_destroy(struct ena_com_dev *ena_dev)
2423 {
2424 ena_com_indirect_table_destroy(ena_dev);
2425 ena_com_hash_key_destroy(ena_dev);
2426 ena_com_hash_ctrl_destroy(ena_dev);
2427
2428 memset(&ena_dev->rss, 0x0, sizeof(ena_dev->rss));
2429 }
2430
2431 int ena_com_allocate_host_info(struct ena_com_dev *ena_dev)
2432 {
2433 struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2434
2435 host_attr->host_info =
2436 dma_zalloc_coherent(ena_dev->dmadev, SZ_4K,
2437 &host_attr->host_info_dma_addr, GFP_KERNEL);
2438 if (unlikely(!host_attr->host_info))
2439 return -ENOMEM;
2440
2441 return 0;
2442 }
2443
2444 int ena_com_allocate_debug_area(struct ena_com_dev *ena_dev,
2445 u32 debug_area_size)
2446 {
2447 struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2448
2449 host_attr->debug_area_virt_addr =
2450 dma_zalloc_coherent(ena_dev->dmadev, debug_area_size,
2451 &host_attr->debug_area_dma_addr, GFP_KERNEL);
2452 if (unlikely(!host_attr->debug_area_virt_addr)) {
2453 host_attr->debug_area_size = 0;
2454 return -ENOMEM;
2455 }
2456
2457 host_attr->debug_area_size = debug_area_size;
2458
2459 return 0;
2460 }
2461
2462 void ena_com_delete_host_info(struct ena_com_dev *ena_dev)
2463 {
2464 struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2465
2466 if (host_attr->host_info) {
2467 dma_free_coherent(ena_dev->dmadev, SZ_4K, host_attr->host_info,
2468 host_attr->host_info_dma_addr);
2469 host_attr->host_info = NULL;
2470 }
2471 }
2472
2473 void ena_com_delete_debug_area(struct ena_com_dev *ena_dev)
2474 {
2475 struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2476
2477 if (host_attr->debug_area_virt_addr) {
2478 dma_free_coherent(ena_dev->dmadev, host_attr->debug_area_size,
2479 host_attr->debug_area_virt_addr,
2480 host_attr->debug_area_dma_addr);
2481 host_attr->debug_area_virt_addr = NULL;
2482 }
2483 }
2484
2485 int ena_com_set_host_attributes(struct ena_com_dev *ena_dev)
2486 {
2487 struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2488 struct ena_com_admin_queue *admin_queue;
2489 struct ena_admin_set_feat_cmd cmd;
2490 struct ena_admin_set_feat_resp resp;
2491
2492 int ret;
2493
2494 /* Host attribute config is called before ena_com_get_dev_attr_feat
2495 * so ena_com can't check if the feature is supported.
2496 */
2497
2498 memset(&cmd, 0x0, sizeof(cmd));
2499 admin_queue = &ena_dev->admin_queue;
2500
2501 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2502 cmd.feat_common.feature_id = ENA_ADMIN_HOST_ATTR_CONFIG;
2503
2504 ret = ena_com_mem_addr_set(ena_dev,
2505 &cmd.u.host_attr.debug_ba,
2506 host_attr->debug_area_dma_addr);
2507 if (unlikely(ret)) {
2508 pr_err("memory address set failed\n");
2509 return ret;
2510 }
2511
2512 ret = ena_com_mem_addr_set(ena_dev,
2513 &cmd.u.host_attr.os_info_ba,
2514 host_attr->host_info_dma_addr);
2515 if (unlikely(ret)) {
2516 pr_err("memory address set failed\n");
2517 return ret;
2518 }
2519
2520 cmd.u.host_attr.debug_area_size = host_attr->debug_area_size;
2521
2522 ret = ena_com_execute_admin_command(admin_queue,
2523 (struct ena_admin_aq_entry *)&cmd,
2524 sizeof(cmd),
2525 (struct ena_admin_acq_entry *)&resp,
2526 sizeof(resp));
2527
2528 if (unlikely(ret))
2529 pr_err("Failed to set host attributes: %d\n", ret);
2530
2531 return ret;
2532 }
2533
2534 /* Interrupt moderation */
2535 bool ena_com_interrupt_moderation_supported(struct ena_com_dev *ena_dev)
2536 {
2537 return ena_com_check_supported_feature_id(ena_dev,
2538 ENA_ADMIN_INTERRUPT_MODERATION);
2539 }
2540
2541 int ena_com_update_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev,
2542 u32 tx_coalesce_usecs)
2543 {
2544 if (!ena_dev->intr_delay_resolution) {
2545 pr_err("Illegal interrupt delay granularity value\n");
2546 return -EFAULT;
2547 }
2548
2549 ena_dev->intr_moder_tx_interval = tx_coalesce_usecs /
2550 ena_dev->intr_delay_resolution;
2551
2552 return 0;
2553 }
2554
2555 int ena_com_update_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev,
2556 u32 rx_coalesce_usecs)
2557 {
2558 if (!ena_dev->intr_delay_resolution) {
2559 pr_err("Illegal interrupt delay granularity value\n");
2560 return -EFAULT;
2561 }
2562
2563 /* We use LOWEST entry of moderation table for storing
2564 * nonadaptive interrupt coalescing values
2565 */
2566 ena_dev->intr_moder_tbl[ENA_INTR_MODER_LOWEST].intr_moder_interval =
2567 rx_coalesce_usecs / ena_dev->intr_delay_resolution;
2568
2569 return 0;
2570 }
2571
2572 void ena_com_destroy_interrupt_moderation(struct ena_com_dev *ena_dev)
2573 {
2574 if (ena_dev->intr_moder_tbl)
2575 devm_kfree(ena_dev->dmadev, ena_dev->intr_moder_tbl);
2576 ena_dev->intr_moder_tbl = NULL;
2577 }
2578
2579 int ena_com_init_interrupt_moderation(struct ena_com_dev *ena_dev)
2580 {
2581 struct ena_admin_get_feat_resp get_resp;
2582 u16 delay_resolution;
2583 int rc;
2584
2585 rc = ena_com_get_feature(ena_dev, &get_resp,
2586 ENA_ADMIN_INTERRUPT_MODERATION);
2587
2588 if (rc) {
2589 if (rc == -EOPNOTSUPP) {
2590 pr_debug("Feature %d isn't supported\n",
2591 ENA_ADMIN_INTERRUPT_MODERATION);
2592 rc = 0;
2593 } else {
2594 pr_err("Failed to get interrupt moderation admin cmd. rc: %d\n",
2595 rc);
2596 }
2597
2598 /* no moderation supported, disable adaptive support */
2599 ena_com_disable_adaptive_moderation(ena_dev);
2600 return rc;
2601 }
2602
2603 rc = ena_com_init_interrupt_moderation_table(ena_dev);
2604 if (rc)
2605 goto err;
2606
2607 /* if moderation is supported by device we set adaptive moderation */
2608 delay_resolution = get_resp.u.intr_moderation.intr_delay_resolution;
2609 ena_com_update_intr_delay_resolution(ena_dev, delay_resolution);
2610 ena_com_enable_adaptive_moderation(ena_dev);
2611
2612 return 0;
2613 err:
2614 ena_com_destroy_interrupt_moderation(ena_dev);
2615 return rc;
2616 }
2617
2618 void ena_com_config_default_interrupt_moderation_table(struct ena_com_dev *ena_dev)
2619 {
2620 struct ena_intr_moder_entry *intr_moder_tbl = ena_dev->intr_moder_tbl;
2621
2622 if (!intr_moder_tbl)
2623 return;
2624
2625 intr_moder_tbl[ENA_INTR_MODER_LOWEST].intr_moder_interval =
2626 ENA_INTR_LOWEST_USECS;
2627 intr_moder_tbl[ENA_INTR_MODER_LOWEST].pkts_per_interval =
2628 ENA_INTR_LOWEST_PKTS;
2629 intr_moder_tbl[ENA_INTR_MODER_LOWEST].bytes_per_interval =
2630 ENA_INTR_LOWEST_BYTES;
2631
2632 intr_moder_tbl[ENA_INTR_MODER_LOW].intr_moder_interval =
2633 ENA_INTR_LOW_USECS;
2634 intr_moder_tbl[ENA_INTR_MODER_LOW].pkts_per_interval =
2635 ENA_INTR_LOW_PKTS;
2636 intr_moder_tbl[ENA_INTR_MODER_LOW].bytes_per_interval =
2637 ENA_INTR_LOW_BYTES;
2638
2639 intr_moder_tbl[ENA_INTR_MODER_MID].intr_moder_interval =
2640 ENA_INTR_MID_USECS;
2641 intr_moder_tbl[ENA_INTR_MODER_MID].pkts_per_interval =
2642 ENA_INTR_MID_PKTS;
2643 intr_moder_tbl[ENA_INTR_MODER_MID].bytes_per_interval =
2644 ENA_INTR_MID_BYTES;
2645
2646 intr_moder_tbl[ENA_INTR_MODER_HIGH].intr_moder_interval =
2647 ENA_INTR_HIGH_USECS;
2648 intr_moder_tbl[ENA_INTR_MODER_HIGH].pkts_per_interval =
2649 ENA_INTR_HIGH_PKTS;
2650 intr_moder_tbl[ENA_INTR_MODER_HIGH].bytes_per_interval =
2651 ENA_INTR_HIGH_BYTES;
2652
2653 intr_moder_tbl[ENA_INTR_MODER_HIGHEST].intr_moder_interval =
2654 ENA_INTR_HIGHEST_USECS;
2655 intr_moder_tbl[ENA_INTR_MODER_HIGHEST].pkts_per_interval =
2656 ENA_INTR_HIGHEST_PKTS;
2657 intr_moder_tbl[ENA_INTR_MODER_HIGHEST].bytes_per_interval =
2658 ENA_INTR_HIGHEST_BYTES;
2659 }
2660
2661 unsigned int ena_com_get_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev)
2662 {
2663 return ena_dev->intr_moder_tx_interval;
2664 }
2665
2666 unsigned int ena_com_get_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev)
2667 {
2668 struct ena_intr_moder_entry *intr_moder_tbl = ena_dev->intr_moder_tbl;
2669
2670 if (intr_moder_tbl)
2671 return intr_moder_tbl[ENA_INTR_MODER_LOWEST].intr_moder_interval;
2672
2673 return 0;
2674 }
2675
2676 void ena_com_init_intr_moderation_entry(struct ena_com_dev *ena_dev,
2677 enum ena_intr_moder_level level,
2678 struct ena_intr_moder_entry *entry)
2679 {
2680 struct ena_intr_moder_entry *intr_moder_tbl = ena_dev->intr_moder_tbl;
2681
2682 if (level >= ENA_INTR_MAX_NUM_OF_LEVELS)
2683 return;
2684
2685 intr_moder_tbl[level].intr_moder_interval = entry->intr_moder_interval;
2686 if (ena_dev->intr_delay_resolution)
2687 intr_moder_tbl[level].intr_moder_interval /=
2688 ena_dev->intr_delay_resolution;
2689 intr_moder_tbl[level].pkts_per_interval = entry->pkts_per_interval;
2690
2691 /* use hardcoded value until ethtool supports bytecount parameter */
2692 if (entry->bytes_per_interval != ENA_INTR_BYTE_COUNT_NOT_SUPPORTED)
2693 intr_moder_tbl[level].bytes_per_interval = entry->bytes_per_interval;
2694 }
2695
2696 void ena_com_get_intr_moderation_entry(struct ena_com_dev *ena_dev,
2697 enum ena_intr_moder_level level,
2698 struct ena_intr_moder_entry *entry)
2699 {
2700 struct ena_intr_moder_entry *intr_moder_tbl = ena_dev->intr_moder_tbl;
2701
2702 if (level >= ENA_INTR_MAX_NUM_OF_LEVELS)
2703 return;
2704
2705 entry->intr_moder_interval = intr_moder_tbl[level].intr_moder_interval;
2706 if (ena_dev->intr_delay_resolution)
2707 entry->intr_moder_interval *= ena_dev->intr_delay_resolution;
2708 entry->pkts_per_interval =
2709 intr_moder_tbl[level].pkts_per_interval;
2710 entry->bytes_per_interval = intr_moder_tbl[level].bytes_per_interval;
2711 }
CRIS linux kernel tree