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