drivers/net/ethernet/amazon/ena/ena_com.c

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