drivers/net/ena/base/ena_com.c

   1 /*-
   2 * BSD LICENSE
   3 *
   4 * Copyright (c) 2015-2016 Amazon.com, Inc. or its affiliates.
   5 * All rights reserved.
   6 *
   7 * Redistribution and use in source and binary forms, with or without
   8 * modification, are permitted provided that the following conditions
   9 * are met:
  10 *
  11 * * Redistributions of source code must retain the above copyright
  12 * notice, this list of conditions and the following disclaimer.
  13 * * Redistributions in binary form must reproduce the above copyright
  14 * notice, this list of conditions and the following disclaimer in
  15 * the documentation and/or other materials provided with the
  16 * distribution.
  17 * * Neither the name of copyright holder nor the names of its
  18 * contributors may be used to endorse or promote products derived
  19 * from this software without specific prior written permission.
  20 *
  21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32 */
  33
  34 #include "ena_com.h"
  35
  36 /*****************************************************************************/
  37 /*****************************************************************************/
  38
  39 /* Timeout in micro-sec */
  40 #define ADMIN_CMD_TIMEOUT_US (1000000)
  41
  42 #define ENA_ASYNC_QUEUE_DEPTH 4
  43 #define ENA_ADMIN_QUEUE_DEPTH 32
  44
  45 #define MIN_ENA_VER (((ENA_COMMON_SPEC_VERSION_MAJOR) << \
  46                 ENA_REGS_VERSION_MAJOR_VERSION_SHIFT) \
  47                 | (ENA_COMMON_SPEC_VERSION_MINOR))
  48
  49 #define ENA_CTRL_MAJOR          0
  50 #define ENA_CTRL_MINOR          0
  51 #define ENA_CTRL_SUB_MINOR      1
  52
  53 #define MIN_ENA_CTRL_VER \
  54         (((ENA_CTRL_MAJOR) << \
  55         (ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_SHIFT)) | \
  56         ((ENA_CTRL_MINOR) << \
  57         (ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_SHIFT)) | \
  58         (ENA_CTRL_SUB_MINOR))
  59
  60 #define ENA_DMA_ADDR_TO_UINT32_LOW(x)   ((u32)((u64)(x)))
  61 #define ENA_DMA_ADDR_TO_UINT32_HIGH(x)  ((u32)(((u64)(x)) >> 32))
  62
  63 #define ENA_MMIO_READ_TIMEOUT 0xFFFFFFFF
  64
  65 static int ena_alloc_cnt;
  66
  67 /*****************************************************************************/
  68 /*****************************************************************************/
  69 /*****************************************************************************/
  70
  71 enum ena_cmd_status {
  72         ENA_CMD_SUBMITTED,
  73         ENA_CMD_COMPLETED,
  74         /* Abort - canceled by the driver */
  75         ENA_CMD_ABORTED,
  76 };
  77
  78 struct ena_comp_ctx {
  79         ena_wait_event_t wait_event;
  80         struct ena_admin_acq_entry *user_cqe;
  81         u32 comp_size;
  82         enum ena_cmd_status status;
  83         /* status from the device */
  84         u8 comp_status;
  85         u8 cmd_opcode;
  86         bool occupied;
  87 };
  88
  89 static inline int ena_com_mem_addr_set(struct ena_com_dev *ena_dev,
  90                                        struct ena_common_mem_addr *ena_addr,
  91                                        dma_addr_t addr)
  92 {
  93         if ((addr & GENMASK_ULL(ena_dev->dma_addr_bits - 1, 0)) != addr) {
  94                 ena_trc_err("dma address has more bits that the device supports\n");
  95                 return ENA_COM_INVAL;
  96         }
  97
  98         ena_addr->mem_addr_low = (u32)addr;
  99         ena_addr->mem_addr_high =
 100                 ((addr & GENMASK_ULL(ena_dev->dma_addr_bits - 1, 32)) >> 32);
 101
 102         return 0;
 103 }
 104
 105 static int ena_com_admin_init_sq(struct ena_com_admin_queue *queue)
 106 {
 107         ENA_MEM_ALLOC_COHERENT(queue->q_dmadev,
 108                                ADMIN_SQ_SIZE(queue->q_depth),
 109                                queue->sq.entries,
 110                                queue->sq.dma_addr,
 111                                queue->sq.mem_handle);
 112
 113         if (!queue->sq.entries) {
 114                 ena_trc_err("memory allocation failed");
 115                 return ENA_COM_NO_MEM;
 116         }
 117
 118         queue->sq.head = 0;
 119         queue->sq.tail = 0;
 120         queue->sq.phase = 1;
 121
 122         queue->sq.db_addr = NULL;
 123
 124         return 0;
 125 }
 126
 127 static int ena_com_admin_init_cq(struct ena_com_admin_queue *queue)
 128 {
 129         ENA_MEM_ALLOC_COHERENT(queue->q_dmadev,
 130                                ADMIN_CQ_SIZE(queue->q_depth),
 131                                queue->cq.entries,
 132                                queue->cq.dma_addr,
 133                                queue->cq.mem_handle);
 134
 135         if (!queue->cq.entries)  {
 136                 ena_trc_err("memory allocation failed");
 137                 return ENA_COM_NO_MEM;
 138         }
 139
 140         queue->cq.head = 0;
 141         queue->cq.phase = 1;
 142
 143         return 0;
 144 }
 145
 146 static int ena_com_admin_init_aenq(struct ena_com_dev *dev,
 147                                    struct ena_aenq_handlers *aenq_handlers)
 148 {
 149         u32 addr_low, addr_high, aenq_caps;
 150
 151         dev->aenq.q_depth = ENA_ASYNC_QUEUE_DEPTH;
 152         ENA_MEM_ALLOC_COHERENT(dev->dmadev,
 153                                ADMIN_AENQ_SIZE(dev->aenq.q_depth),
 154                                dev->aenq.entries,
 155                                dev->aenq.dma_addr,
 156                                dev->aenq.mem_handle);
 157
 158         if (!dev->aenq.entries) {
 159                 ena_trc_err("memory allocation failed");
 160                 return ENA_COM_NO_MEM;
 161         }
 162
 163         dev->aenq.head = dev->aenq.q_depth;
 164         dev->aenq.phase = 1;
 165
 166         addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(dev->aenq.dma_addr);
 167         addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(dev->aenq.dma_addr);
 168
 169         ENA_REG_WRITE32(addr_low, (unsigned char *)dev->reg_bar
 170                         + ENA_REGS_AENQ_BASE_LO_OFF);
 171         ENA_REG_WRITE32(addr_high, (unsigned char *)dev->reg_bar
 172                         + ENA_REGS_AENQ_BASE_HI_OFF);
 173
 174         aenq_caps = 0;
 175         aenq_caps |= dev->aenq.q_depth & ENA_REGS_AENQ_CAPS_AENQ_DEPTH_MASK;
 176         aenq_caps |= (sizeof(struct ena_admin_aenq_entry) <<
 177                 ENA_REGS_AENQ_CAPS_AENQ_ENTRY_SIZE_SHIFT) &
 178                 ENA_REGS_AENQ_CAPS_AENQ_ENTRY_SIZE_MASK;
 179
 180         ENA_REG_WRITE32(aenq_caps, (unsigned char *)dev->reg_bar
 181                         + ENA_REGS_AENQ_CAPS_OFF);
 182
 183         if (unlikely(!aenq_handlers))
 184                 ena_trc_err("aenq handlers pointer is NULL\n");
 185
 186         dev->aenq.aenq_handlers = aenq_handlers;
 187
 188         return 0;
 189 }
 190
 191 static inline void comp_ctxt_release(struct ena_com_admin_queue *queue,
 192                                      struct ena_comp_ctx *comp_ctx)
 193 {
 194         comp_ctx->occupied = false;
 195         ATOMIC32_DEC(&queue->outstanding_cmds);
 196 }
 197
 198 static struct ena_comp_ctx *get_comp_ctxt(struct ena_com_admin_queue *queue,
 199                                           u16 command_id, bool capture)
 200 {
 201         if (unlikely(command_id >= queue->q_depth)) {
 202                 ena_trc_err("command id is larger than the queue size. cmd_id: %u queue size %d\n",
 203                             command_id, queue->q_depth);
 204                 return NULL;
 205         }
 206
 207         if (unlikely(queue->comp_ctx[command_id].occupied && capture)) {
 208                 ena_trc_err("Completion context is occupied\n");
 209                 return NULL;
 210         }
 211
 212         if (capture) {
 213                 ATOMIC32_INC(&queue->outstanding_cmds);
 214                 queue->comp_ctx[command_id].occupied = true;
 215         }
 216
 217         return &queue->comp_ctx[command_id];
 218 }
 219
 220 static struct ena_comp_ctx *
 221 __ena_com_submit_admin_cmd(struct ena_com_admin_queue *admin_queue,
 222                            struct ena_admin_aq_entry *cmd,
 223                            size_t cmd_size_in_bytes,
 224                            struct ena_admin_acq_entry *comp,
 225                            size_t comp_size_in_bytes)
 226 {
 227         struct ena_comp_ctx *comp_ctx;
 228         u16 tail_masked, cmd_id;
 229         u16 queue_size_mask;
 230         u16 cnt;
 231
 232         queue_size_mask = admin_queue->q_depth - 1;
 233
 234         tail_masked = admin_queue->sq.tail & queue_size_mask;
 235
 236         /* In case of queue FULL */
 237         cnt = admin_queue->sq.tail - admin_queue->sq.head;
 238         if (cnt >= admin_queue->q_depth) {
 239                 ena_trc_dbg("admin queue is FULL (tail %d head %d depth: %d)\n",
 240                             admin_queue->sq.tail,
 241                             admin_queue->sq.head,
 242                             admin_queue->q_depth);
 243                 admin_queue->stats.out_of_space++;
 244                 return ERR_PTR(ENA_COM_NO_SPACE);
 245         }
 246
 247         cmd_id = admin_queue->curr_cmd_id;
 248
 249         cmd->aq_common_descriptor.flags |= admin_queue->sq.phase &
 250                 ENA_ADMIN_AQ_COMMON_DESC_PHASE_MASK;
 251
 252         cmd->aq_common_descriptor.command_id |= cmd_id &
 253                 ENA_ADMIN_AQ_COMMON_DESC_COMMAND_ID_MASK;
 254
 255         comp_ctx = get_comp_ctxt(admin_queue, cmd_id, true);
 256
 257         comp_ctx->status = ENA_CMD_SUBMITTED;
 258         comp_ctx->comp_size = (u32)comp_size_in_bytes;
 259         comp_ctx->user_cqe = comp;
 260         comp_ctx->cmd_opcode = cmd->aq_common_descriptor.opcode;
 261
 262         ENA_WAIT_EVENT_CLEAR(comp_ctx->wait_event);
 263
 264         memcpy(&admin_queue->sq.entries[tail_masked], cmd, cmd_size_in_bytes);
 265
 266         admin_queue->curr_cmd_id = (admin_queue->curr_cmd_id + 1) &
 267                 queue_size_mask;
 268
 269         admin_queue->sq.tail++;
 270         admin_queue->stats.submitted_cmd++;
 271
 272         if (unlikely((admin_queue->sq.tail & queue_size_mask) == 0))
 273                 admin_queue->sq.phase = !admin_queue->sq.phase;
 274
 275         ENA_REG_WRITE32(admin_queue->sq.tail, admin_queue->sq.db_addr);
 276
 277         return comp_ctx;
 278 }
 279
 280 static inline int ena_com_init_comp_ctxt(struct ena_com_admin_queue *queue)
 281 {
 282         size_t size = queue->q_depth * sizeof(struct ena_comp_ctx);
 283         struct ena_comp_ctx *comp_ctx;
 284         u16 i;
 285
 286         queue->comp_ctx = ENA_MEM_ALLOC(queue->q_dmadev, size);
 287         if (unlikely(!queue->comp_ctx)) {
 288                 ena_trc_err("memory allocation failed");
 289                 return ENA_COM_NO_MEM;
 290         }
 291
 292         for (i = 0; i < queue->q_depth; i++) {
 293                 comp_ctx = get_comp_ctxt(queue, i, false);
 294                 if (comp_ctx)
 295                         ENA_WAIT_EVENT_INIT(comp_ctx->wait_event);
 296         }
 297
 298         return 0;
 299 }
 300
 301 static struct ena_comp_ctx *
 302 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 = 0;
 309         struct ena_comp_ctx *comp_ctx;
 310
 311         ENA_SPINLOCK_LOCK(admin_queue->q_lock, flags);
 312         if (unlikely(!admin_queue->running_state)) {
 313                 ENA_SPINLOCK_UNLOCK(admin_queue->q_lock, flags);
 314                 return ERR_PTR(ENA_COM_NO_DEVICE);
 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 (unlikely(IS_ERR(comp_ctx)))
 321                 admin_queue->running_state = false;
 322         ENA_SPINLOCK_UNLOCK(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         ENA_TOUCH(ctx);
 335
 336         memset(&io_sq->desc_addr, 0x0, sizeof(struct ena_com_io_desc_addr));
 337
 338         io_sq->desc_entry_size =
 339                 (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX) ?
 340                 sizeof(struct ena_eth_io_tx_desc) :
 341                 sizeof(struct ena_eth_io_rx_desc);
 342
 343         size = io_sq->desc_entry_size * io_sq->q_depth;
 344
 345         if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST) {
 346                 ENA_MEM_ALLOC_COHERENT_NODE(ena_dev->dmadev,
 347                                             size,
 348                                             io_sq->desc_addr.virt_addr,
 349                                             io_sq->desc_addr.phys_addr,
 350                                             ctx->numa_node,
 351                                             dev_node);
 352                 if (!io_sq->desc_addr.virt_addr)
 353                         ENA_MEM_ALLOC_COHERENT(ena_dev->dmadev,
 354                                                size,
 355                                                io_sq->desc_addr.virt_addr,
 356                                                io_sq->desc_addr.phys_addr,
 357                                                io_sq->desc_addr.mem_handle);
 358         } else {
 359                 ENA_MEM_ALLOC_NODE(ena_dev->dmadev,
 360                                    size,
 361                                    io_sq->desc_addr.virt_addr,
 362                                    ctx->numa_node,
 363                                    dev_node);
 364                 if (!io_sq->desc_addr.virt_addr)
 365                         io_sq->desc_addr.virt_addr =
 366                                 ENA_MEM_ALLOC(ena_dev->dmadev, size);
 367         }
 368
 369         if (!io_sq->desc_addr.virt_addr) {
 370                 ena_trc_err("memory allocation failed");
 371                 return ENA_COM_NO_MEM;
 372         }
 373
 374         io_sq->tail = 0;
 375         io_sq->next_to_comp = 0;
 376         io_sq->phase = 1;
 377
 378         return 0;
 379 }
 380
 381 static int ena_com_init_io_cq(struct ena_com_dev *ena_dev,
 382                               struct ena_com_create_io_ctx *ctx,
 383                               struct ena_com_io_cq *io_cq)
 384 {
 385         size_t size;
 386         int prev_node = 0;
 387
 388         ENA_TOUCH(ctx);
 389         memset(&io_cq->cdesc_addr, 0x0, sizeof(struct ena_com_io_desc_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         ENA_MEM_ALLOC_COHERENT_NODE(ena_dev->dmadev,
 400                                     size,
 401                                     io_cq->cdesc_addr.virt_addr,
 402                                     io_cq->cdesc_addr.phys_addr,
 403                                     ctx->numa_node,
 404                                     prev_node);
 405         if (!io_cq->cdesc_addr.virt_addr)
 406                 ENA_MEM_ALLOC_COHERENT(ena_dev->dmadev,
 407                                        size,
 408                                        io_cq->cdesc_addr.virt_addr,
 409                                        io_cq->cdesc_addr.phys_addr,
 410                                        io_cq->cdesc_addr.mem_handle);
 411
 412         if (!io_cq->cdesc_addr.virt_addr) {
 413                 ena_trc_err("memory allocation failed");
 414                 return ENA_COM_NO_MEM;
 415         }
 416
 417         io_cq->phase = 1;
 418         io_cq->head = 0;
 419
 420         return 0;
 421 }
 422
 423 static void
 424 ena_com_handle_single_admin_completion(struct ena_com_admin_queue *admin_queue,
 425                                        struct ena_admin_acq_entry *cqe)
 426 {
 427         struct ena_comp_ctx *comp_ctx;
 428         u16 cmd_id;
 429
 430         cmd_id = cqe->acq_common_descriptor.command &
 431                 ENA_ADMIN_ACQ_COMMON_DESC_COMMAND_ID_MASK;
 432
 433         comp_ctx = get_comp_ctxt(admin_queue, cmd_id, false);
 434         if (unlikely(!comp_ctx)) {
 435                 ena_trc_err("comp_ctx is NULL. Changing the admin queue running state\n");
 436                 admin_queue->running_state = false;
 437                 return;
 438         }
 439
 440         comp_ctx->status = ENA_CMD_COMPLETED;
 441         comp_ctx->comp_status = cqe->acq_common_descriptor.status;
 442
 443         if (comp_ctx->user_cqe)
 444                 memcpy(comp_ctx->user_cqe, (void *)cqe, comp_ctx->comp_size);
 445
 446         if (!admin_queue->polling)
 447                 ENA_WAIT_EVENT_SIGNAL(comp_ctx->wait_event);
 448 }
 449
 450 static void
 451 ena_com_handle_admin_completion(struct ena_com_admin_queue *admin_queue)
 452 {
 453         struct ena_admin_acq_entry *cqe = NULL;
 454         u16 comp_num = 0;
 455         u16 head_masked;
 456         u8 phase;
 457
 458         head_masked = admin_queue->cq.head & (admin_queue->q_depth - 1);
 459         phase = admin_queue->cq.phase;
 460
 461         cqe = &admin_queue->cq.entries[head_masked];
 462
 463         /* Go over all the completions */
 464         while ((cqe->acq_common_descriptor.flags &
 465                         ENA_ADMIN_ACQ_COMMON_DESC_PHASE_MASK) == phase) {
 466                 /* Do not read the rest of the completion entry before the
 467                  * phase bit was validated
 468                  */
 469                 rmb();
 470                 ena_com_handle_single_admin_completion(admin_queue, cqe);
 471
 472                 head_masked++;
 473                 comp_num++;
 474                 if (unlikely(head_masked == admin_queue->q_depth)) {
 475                         head_masked = 0;
 476                         phase = !phase;
 477                 }
 478
 479                 cqe = &admin_queue->cq.entries[head_masked];
 480         }
 481
 482         admin_queue->cq.head += comp_num;
 483         admin_queue->cq.phase = phase;
 484         admin_queue->sq.head += comp_num;
 485         admin_queue->stats.completed_cmd += comp_num;
 486 }
 487
 488 static int ena_com_comp_status_to_errno(u8 comp_status)
 489 {
 490         if (unlikely(comp_status != 0))
 491                 ena_trc_err("admin command failed[%u]\n", comp_status);
 492
 493         if (unlikely(comp_status > ENA_ADMIN_UNKNOWN_ERROR))
 494                 return ENA_COM_INVAL;
 495
 496         switch (comp_status) {
 497         case ENA_ADMIN_SUCCESS:
 498                 return 0;
 499         case ENA_ADMIN_RESOURCE_ALLOCATION_FAILURE:
 500                 return ENA_COM_NO_MEM;
 501         case ENA_ADMIN_UNSUPPORTED_OPCODE:
 502                 return ENA_COM_PERMISSION;
 503         case ENA_ADMIN_BAD_OPCODE:
 504         case ENA_ADMIN_MALFORMED_REQUEST:
 505         case ENA_ADMIN_ILLEGAL_PARAMETER:
 506         case ENA_ADMIN_UNKNOWN_ERROR:
 507                 return ENA_COM_INVAL;
 508         }
 509
 510         return 0;
 511 }
 512
 513 static int
 514 ena_com_wait_and_process_admin_cq_polling(
 515                 struct ena_comp_ctx *comp_ctx,
 516                 struct ena_com_admin_queue *admin_queue)
 517 {
 518         unsigned long flags = 0;
 519         u64 start_time;
 520         int ret;
 521
 522         start_time = ENA_GET_SYSTEM_USECS();
 523
 524         while (comp_ctx->status == ENA_CMD_SUBMITTED) {
 525                 if ((ENA_GET_SYSTEM_USECS() - start_time) >
 526                     ADMIN_CMD_TIMEOUT_US) {
 527                         ena_trc_err("Wait for completion (polling) timeout\n");
 528                         /* ENA didn't have any completion */
 529                         ENA_SPINLOCK_LOCK(admin_queue->q_lock, flags);
 530                         admin_queue->stats.no_completion++;
 531                         admin_queue->running_state = false;
 532                         ENA_SPINLOCK_UNLOCK(admin_queue->q_lock, flags);
 533
 534                         ret = ENA_COM_TIMER_EXPIRED;
 535                         goto err;
 536                 }
 537
 538                 ENA_SPINLOCK_LOCK(admin_queue->q_lock, flags);
 539                 ena_com_handle_admin_completion(admin_queue);
 540                 ENA_SPINLOCK_UNLOCK(admin_queue->q_lock, flags);
 541         }
 542
 543         if (unlikely(comp_ctx->status == ENA_CMD_ABORTED)) {
 544                 ena_trc_err("Command was aborted\n");
 545                 ENA_SPINLOCK_LOCK(admin_queue->q_lock, flags);
 546                 admin_queue->stats.aborted_cmd++;
 547                 ENA_SPINLOCK_UNLOCK(admin_queue->q_lock, flags);
 548                 ret = ENA_COM_NO_DEVICE;
 549                 goto err;
 550         }
 551
 552         ENA_ASSERT(comp_ctx->status == ENA_CMD_COMPLETED,
 553                    "Invalid comp status %d\n", comp_ctx->status);
 554
 555         ret = ena_com_comp_status_to_errno(comp_ctx->comp_status);
 556 err:
 557         comp_ctxt_release(admin_queue, comp_ctx);
 558         return ret;
 559 }
 560
 561 static int
 562 ena_com_wait_and_process_admin_cq_interrupts(
 563                 struct ena_comp_ctx *comp_ctx,
 564                 struct ena_com_admin_queue *admin_queue)
 565 {
 566         unsigned long flags = 0;
 567         int ret = 0;
 568
 569         ENA_WAIT_EVENT_WAIT(comp_ctx->wait_event,
 570                             ADMIN_CMD_TIMEOUT_US);
 571
 572         /* In case the command wasn't completed find out the root cause.
 573          * There might be 2 kinds of errors
 574          * 1) No completion (timeout reached)
 575          * 2) There is completion but the device didn't get any msi-x interrupt.
 576          */
 577         if (unlikely(comp_ctx->status == ENA_CMD_SUBMITTED)) {
 578                 ENA_SPINLOCK_LOCK(admin_queue->q_lock, flags);
 579                 ena_com_handle_admin_completion(admin_queue);
 580                 admin_queue->stats.no_completion++;
 581                 ENA_SPINLOCK_UNLOCK(admin_queue->q_lock, flags);
 582
 583                 if (comp_ctx->status == ENA_CMD_COMPLETED)
 584                         ena_trc_err("The ena device have completion but the driver didn't receive any MSI-X interrupt (cmd %d)\n",
 585                                     comp_ctx->cmd_opcode);
 586                 else
 587                         ena_trc_err("The ena device doesn't send any completion for the admin cmd %d status %d\n",
 588                                     comp_ctx->cmd_opcode, comp_ctx->status);
 589
 590                 admin_queue->running_state = false;
 591                 ret = ENA_COM_TIMER_EXPIRED;
 592                 goto err;
 593         }
 594
 595         ret = ena_com_comp_status_to_errno(comp_ctx->comp_status);
 596 err:
 597         comp_ctxt_release(admin_queue, comp_ctx);
 598         return ret;
 599 }
 600
 601 /* This method read the hardware device register through posting writes
 602  * and waiting for response
 603  * On timeout the function will return ENA_MMIO_READ_TIMEOUT
 604  */
 605 static u32 ena_com_reg_bar_read32(struct ena_com_dev *ena_dev, u16 offset)
 606 {
 607         struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
 608         volatile struct ena_admin_ena_mmio_req_read_less_resp *read_resp =
 609                 mmio_read->read_resp;
 610         u32 mmio_read_reg, ret;
 611         unsigned long flags = 0;
 612         int i;
 613
 614         ENA_MIGHT_SLEEP();
 615
 616         /* If readless is disabled, perform regular read */
 617         if (!mmio_read->readless_supported)
 618                 return ENA_REG_READ32((unsigned char *)ena_dev->reg_bar +
 619                                       offset);
 620
 621         ENA_SPINLOCK_LOCK(mmio_read->lock, flags);
 622         mmio_read->seq_num++;
 623
 624         read_resp->req_id = mmio_read->seq_num + 0xDEAD;
 625         mmio_read_reg = (offset << ENA_REGS_MMIO_REG_READ_REG_OFF_SHIFT) &
 626                         ENA_REGS_MMIO_REG_READ_REG_OFF_MASK;
 627         mmio_read_reg |= mmio_read->seq_num &
 628                         ENA_REGS_MMIO_REG_READ_REQ_ID_MASK;
 629
 630         /* make sure read_resp->req_id get updated before the hw can write
 631          * there
 632          */
 633         wmb();
 634
 635         ENA_REG_WRITE32(mmio_read_reg, (unsigned char *)ena_dev->reg_bar
 636                         + ENA_REGS_MMIO_REG_READ_OFF);
 637
 638         for (i = 0; i < ENA_REG_READ_TIMEOUT; i++) {
 639                 if (read_resp->req_id == mmio_read->seq_num)
 640                         break;
 641
 642                 ENA_UDELAY(1);
 643         }
 644
 645         if (unlikely(i == ENA_REG_READ_TIMEOUT)) {
 646                 ena_trc_err("reading reg failed for timeout. expected: req id[%hu] offset[%hu] actual: req id[%hu] offset[%hu]\n",
 647                             mmio_read->seq_num,
 648                             offset,
 649                             read_resp->req_id,
 650                             read_resp->reg_off);
 651                 ret = ENA_MMIO_READ_TIMEOUT;
 652                 goto err;
 653         }
 654
 655         if (read_resp->reg_off != offset) {
 656                 ena_trc_err("reading failed for wrong offset value");
 657                 ret = ENA_MMIO_READ_TIMEOUT;
 658         } else {
 659                 ret = read_resp->reg_val;
 660         }
 661 err:
 662         ENA_SPINLOCK_UNLOCK(mmio_read->lock, flags);
 663
 664         return ret;
 665 }
 666
 667 /* There are two types to wait for completion.
 668  * Polling mode - wait until the completion is available.
 669  * Async mode - wait on wait queue until the completion is ready
 670  * (or the timeout expired).
 671  * It is expected that the IRQ called ena_com_handle_admin_completion
 672  * to mark the completions.
 673  */
 674 static int
 675 ena_com_wait_and_process_admin_cq(struct ena_comp_ctx *comp_ctx,
 676                                   struct ena_com_admin_queue *admin_queue)
 677 {
 678         if (admin_queue->polling)
 679                 return ena_com_wait_and_process_admin_cq_polling(comp_ctx,
 680                                                                  admin_queue);
 681
 682         return ena_com_wait_and_process_admin_cq_interrupts(comp_ctx,
 683                                                             admin_queue);
 684 }
 685
 686 static int ena_com_destroy_io_sq(struct ena_com_dev *ena_dev,
 687                                  struct ena_com_io_sq *io_sq)
 688 {
 689         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
 690         struct ena_admin_aq_destroy_sq_cmd destroy_cmd;
 691         struct ena_admin_acq_destroy_sq_resp_desc destroy_resp;
 692         u8 direction;
 693         int ret;
 694
 695         memset(&destroy_cmd, 0x0, sizeof(struct ena_admin_aq_destroy_sq_cmd));
 696
 697         if (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
 698                 direction = ENA_ADMIN_SQ_DIRECTION_TX;
 699         else
 700                 direction = ENA_ADMIN_SQ_DIRECTION_RX;
 701
 702         destroy_cmd.sq.sq_identity |= (direction <<
 703                 ENA_ADMIN_SQ_SQ_DIRECTION_SHIFT) &
 704                 ENA_ADMIN_SQ_SQ_DIRECTION_MASK;
 705
 706         destroy_cmd.sq.sq_idx = io_sq->idx;
 707         destroy_cmd.aq_common_descriptor.opcode = ENA_ADMIN_DESTROY_SQ;
 708
 709         ret = ena_com_execute_admin_command(
 710                         admin_queue,
 711                         (struct ena_admin_aq_entry *)&destroy_cmd,
 712                         sizeof(destroy_cmd),
 713                         (struct ena_admin_acq_entry *)&destroy_resp,
 714                         sizeof(destroy_resp));
 715
 716         if (unlikely(ret && (ret != ENA_COM_NO_DEVICE)))
 717                 ena_trc_err("failed to destroy io sq error: %d\n", ret);
 718
 719         return ret;
 720 }
 721
 722 static void ena_com_io_queue_free(struct ena_com_dev *ena_dev,
 723                                   struct ena_com_io_sq *io_sq,
 724                                   struct ena_com_io_cq *io_cq)
 725 {
 726         size_t size;
 727
 728         if (io_cq->cdesc_addr.virt_addr) {
 729                 size = io_cq->cdesc_entry_size_in_bytes * io_cq->q_depth;
 730
 731                 ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
 732                                       size,
 733                                       io_cq->cdesc_addr.virt_addr,
 734                                       io_cq->cdesc_addr.phys_addr,
 735                                       io_cq->cdesc_addr.mem_handle);
 736
 737                 io_cq->cdesc_addr.virt_addr = NULL;
 738         }
 739
 740         if (io_sq->desc_addr.virt_addr) {
 741                 size = io_sq->desc_entry_size * io_sq->q_depth;
 742
 743                 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)
 744                         ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
 745                                               size,
 746                                               io_sq->desc_addr.virt_addr,
 747                                               io_sq->desc_addr.phys_addr,
 748                                               io_sq->desc_addr.mem_handle);
 749                 else
 750                         ENA_MEM_FREE(ena_dev->dmadev,
 751                                      io_sq->desc_addr.virt_addr);
 752
 753                 io_sq->desc_addr.virt_addr = NULL;
 754         }
 755 }
 756
 757 static int wait_for_reset_state(struct ena_com_dev *ena_dev,
 758                                 u32 timeout, u16 exp_state)
 759 {
 760         u32 val, i;
 761
 762         for (i = 0; i < timeout; i++) {
 763                 val = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
 764
 765                 if (unlikely(val == ENA_MMIO_READ_TIMEOUT)) {
 766                         ena_trc_err("Reg read timeout occurred\n");
 767                         return ENA_COM_TIMER_EXPIRED;
 768                 }
 769
 770                 if ((val & ENA_REGS_DEV_STS_RESET_IN_PROGRESS_MASK) ==
 771                         exp_state)
 772                         return 0;
 773
 774                 /* The resolution of the timeout is 100ms */
 775                 ENA_MSLEEP(100);
 776         }
 777
 778         return ENA_COM_TIMER_EXPIRED;
 779 }
 780
 781 static bool
 782 ena_com_check_supported_feature_id(struct ena_com_dev *ena_dev,
 783                                    enum ena_admin_aq_feature_id feature_id)
 784 {
 785         u32 feature_mask = 1 << feature_id;
 786
 787         /* Device attributes is always supported */
 788         if ((feature_id != ENA_ADMIN_DEVICE_ATTRIBUTES) &&
 789             !(ena_dev->supported_features & feature_mask))
 790                 return false;
 791
 792         return true;
 793 }
 794
 795 static int ena_com_get_feature_ex(struct ena_com_dev *ena_dev,
 796                                   struct ena_admin_get_feat_resp *get_resp,
 797                                   enum ena_admin_aq_feature_id feature_id,
 798                                   dma_addr_t control_buf_dma_addr,
 799                                   u32 control_buff_size)
 800 {
 801         struct ena_com_admin_queue *admin_queue;
 802         struct ena_admin_get_feat_cmd get_cmd;
 803         int ret;
 804
 805         if (!ena_dev) {
 806                 ena_trc_err("%s : ena_dev is NULL\n", __func__);
 807                 return ENA_COM_NO_DEVICE;
 808         }
 809
 810         if (!ena_com_check_supported_feature_id(ena_dev, feature_id)) {
 811                 ena_trc_info("Feature %d isn't supported\n", feature_id);
 812                 return ENA_COM_PERMISSION;
 813         }
 814
 815         memset(&get_cmd, 0x0, sizeof(get_cmd));
 816         admin_queue = &ena_dev->admin_queue;
 817
 818         get_cmd.aq_common_descriptor.opcode = ENA_ADMIN_GET_FEATURE;
 819
 820         if (control_buff_size)
 821                 get_cmd.aq_common_descriptor.flags =
 822                         ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
 823         else
 824                 get_cmd.aq_common_descriptor.flags = 0;
 825
 826         ret = ena_com_mem_addr_set(ena_dev,
 827                                    &get_cmd.control_buffer.address,
 828                                    control_buf_dma_addr);
 829         if (unlikely(ret)) {
 830                 ena_trc_err("memory address set failed\n");
 831                 return ret;
 832         }
 833
 834         get_cmd.control_buffer.length = control_buff_size;
 835
 836         get_cmd.feat_common.feature_id = feature_id;
 837
 838         ret = ena_com_execute_admin_command(admin_queue,
 839                                             (struct ena_admin_aq_entry *)
 840                                             &get_cmd,
 841                                             sizeof(get_cmd),
 842                                             (struct ena_admin_acq_entry *)
 843                                             get_resp,
 844                                             sizeof(*get_resp));
 845
 846         if (unlikely(ret))
 847                 ena_trc_err("Failed to submit get_feature command %d error: %d\n",
 848                             feature_id, ret);
 849
 850         return ret;
 851 }
 852
 853 static int ena_com_get_feature(struct ena_com_dev *ena_dev,
 854                                struct ena_admin_get_feat_resp *get_resp,
 855                                enum ena_admin_aq_feature_id feature_id)
 856 {
 857         return ena_com_get_feature_ex(ena_dev,
 858                                       get_resp,
 859                                       feature_id,
 860                                       0,
 861                                       0);
 862 }
 863
 864 static int ena_com_hash_key_allocate(struct ena_com_dev *ena_dev)
 865 {
 866         struct ena_rss *rss = &ena_dev->rss;
 867
 868         ENA_MEM_ALLOC_COHERENT(ena_dev->dmadev,
 869                                sizeof(*rss->hash_key),
 870                                rss->hash_key,
 871                                rss->hash_key_dma_addr,
 872                                rss->hash_key_mem_handle);
 873
 874         if (unlikely(!rss->hash_key))
 875                 return ENA_COM_NO_MEM;
 876
 877         return 0;
 878 }
 879
 880 static void ena_com_hash_key_destroy(struct ena_com_dev *ena_dev)
 881 {
 882         struct ena_rss *rss = &ena_dev->rss;
 883
 884         if (rss->hash_key)
 885                 ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
 886                                       sizeof(*rss->hash_key),
 887                                       rss->hash_key,
 888                                       rss->hash_key_dma_addr,
 889                                       rss->hash_key_mem_handle);
 890         rss->hash_key = NULL;
 891 }
 892
 893 static int ena_com_hash_ctrl_init(struct ena_com_dev *ena_dev)
 894 {
 895         struct ena_rss *rss = &ena_dev->rss;
 896
 897         ENA_MEM_ALLOC_COHERENT(ena_dev->dmadev,
 898                                sizeof(*rss->hash_ctrl),
 899                                rss->hash_ctrl,
 900                                rss->hash_ctrl_dma_addr,
 901                                rss->hash_ctrl_mem_handle);
 902
 903         if (unlikely(!rss->hash_ctrl))
 904                 return ENA_COM_NO_MEM;
 905
 906         return 0;
 907 }
 908
 909 static void ena_com_hash_ctrl_destroy(struct ena_com_dev *ena_dev)
 910 {
 911         struct ena_rss *rss = &ena_dev->rss;
 912
 913         if (rss->hash_ctrl)
 914                 ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
 915                                       sizeof(*rss->hash_ctrl),
 916                                       rss->hash_ctrl,
 917                                       rss->hash_ctrl_dma_addr,
 918                                       rss->hash_ctrl_mem_handle);
 919         rss->hash_ctrl = NULL;
 920 }
 921
 922 static int ena_com_indirect_table_allocate(struct ena_com_dev *ena_dev,
 923                                            u16 log_size)
 924 {
 925         struct ena_rss *rss = &ena_dev->rss;
 926         struct ena_admin_get_feat_resp get_resp;
 927         size_t tbl_size;
 928         int ret;
 929
 930         ret = ena_com_get_feature(ena_dev, &get_resp,
 931                                   ENA_ADMIN_RSS_REDIRECTION_TABLE_CONFIG);
 932         if (unlikely(ret))
 933                 return ret;
 934
 935         if ((get_resp.u.ind_table.min_size > log_size) ||
 936             (get_resp.u.ind_table.max_size < log_size)) {
 937                 ena_trc_err("indirect table size doesn't fit. requested size: %d while min is:%d and max %d\n",
 938                             1 << log_size,
 939                             1 << get_resp.u.ind_table.min_size,
 940                             1 << get_resp.u.ind_table.max_size);
 941                 return ENA_COM_INVAL;
 942         }
 943
 944         tbl_size = (1ULL << log_size) *
 945                 sizeof(struct ena_admin_rss_ind_table_entry);
 946
 947         ENA_MEM_ALLOC_COHERENT(ena_dev->dmadev,
 948                                tbl_size,
 949                                rss->rss_ind_tbl,
 950                                rss->rss_ind_tbl_dma_addr,
 951                                rss->rss_ind_tbl_mem_handle);
 952         if (unlikely(!rss->rss_ind_tbl))
 953                 goto mem_err1;
 954
 955         tbl_size = (1ULL << log_size) * sizeof(u16);
 956         rss->host_rss_ind_tbl =
 957                 ENA_MEM_ALLOC(ena_dev->dmadev, tbl_size);
 958         if (unlikely(!rss->host_rss_ind_tbl))
 959                 goto mem_err2;
 960
 961         rss->tbl_log_size = log_size;
 962
 963         return 0;
 964
 965 mem_err2:
 966         tbl_size = (1ULL << log_size) *
 967                 sizeof(struct ena_admin_rss_ind_table_entry);
 968
 969         ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
 970                               tbl_size,
 971                               rss->rss_ind_tbl,
 972                               rss->rss_ind_tbl_dma_addr,
 973                               rss->rss_ind_tbl_mem_handle);
 974         rss->rss_ind_tbl = NULL;
 975 mem_err1:
 976         rss->tbl_log_size = 0;
 977         return ENA_COM_NO_MEM;
 978 }
 979
 980 static void ena_com_indirect_table_destroy(struct ena_com_dev *ena_dev)
 981 {
 982         struct ena_rss *rss = &ena_dev->rss;
 983         size_t tbl_size = (1ULL << rss->tbl_log_size) *
 984                 sizeof(struct ena_admin_rss_ind_table_entry);
 985
 986         if (rss->rss_ind_tbl)
 987                 ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
 988                                       tbl_size,
 989                                       rss->rss_ind_tbl,
 990                                       rss->rss_ind_tbl_dma_addr,
 991                                       rss->rss_ind_tbl_mem_handle);
 992         rss->rss_ind_tbl = NULL;
 993
 994         if (rss->host_rss_ind_tbl)
 995                 ENA_MEM_FREE(ena_dev->dmadev, rss->host_rss_ind_tbl);
 996         rss->host_rss_ind_tbl = NULL;
 997 }
 998
 999 static int ena_com_create_io_sq(struct ena_com_dev *ena_dev,
1000                                 struct ena_com_io_sq *io_sq, u16 cq_idx)
1001 {
1002         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1003         struct ena_admin_aq_create_sq_cmd create_cmd;
1004         struct ena_admin_acq_create_sq_resp_desc cmd_completion;
1005         u8 direction;
1006         int ret;
1007
1008         memset(&create_cmd, 0x0, sizeof(struct ena_admin_aq_create_sq_cmd));
1009
1010         create_cmd.aq_common_descriptor.opcode = ENA_ADMIN_CREATE_SQ;
1011
1012         if (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
1013                 direction = ENA_ADMIN_SQ_DIRECTION_TX;
1014         else
1015                 direction = ENA_ADMIN_SQ_DIRECTION_RX;
1016
1017         create_cmd.sq_identity |= (direction <<
1018                 ENA_ADMIN_AQ_CREATE_SQ_CMD_SQ_DIRECTION_SHIFT) &
1019                 ENA_ADMIN_AQ_CREATE_SQ_CMD_SQ_DIRECTION_MASK;
1020
1021         create_cmd.sq_caps_2 |= io_sq->mem_queue_type &
1022                 ENA_ADMIN_AQ_CREATE_SQ_CMD_PLACEMENT_POLICY_MASK;
1023
1024         create_cmd.sq_caps_2 |= (ENA_ADMIN_COMPLETION_POLICY_DESC <<
1025                 ENA_ADMIN_AQ_CREATE_SQ_CMD_COMPLETION_POLICY_SHIFT) &
1026                 ENA_ADMIN_AQ_CREATE_SQ_CMD_COMPLETION_POLICY_MASK;
1027
1028         create_cmd.sq_caps_3 |=
1029                 ENA_ADMIN_AQ_CREATE_SQ_CMD_IS_PHYSICALLY_CONTIGUOUS_MASK;
1030
1031         create_cmd.cq_idx = cq_idx;
1032         create_cmd.sq_depth = io_sq->q_depth;
1033
1034         if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST) {
1035                 ret = ena_com_mem_addr_set(ena_dev,
1036                                            &create_cmd.sq_ba,
1037                                            io_sq->desc_addr.phys_addr);
1038                 if (unlikely(ret)) {
1039                         ena_trc_err("memory address set failed\n");
1040                         return ret;
1041                 }
1042         }
1043
1044         ret = ena_com_execute_admin_command(
1045                         admin_queue,
1046                         (struct ena_admin_aq_entry *)&create_cmd,
1047                         sizeof(create_cmd),
1048                         (struct ena_admin_acq_entry *)&cmd_completion,
1049                         sizeof(cmd_completion));
1050         if (unlikely(ret)) {
1051                 ena_trc_err("Failed to create IO SQ. error: %d\n", ret);
1052                 return ret;
1053         }
1054
1055         io_sq->idx = cmd_completion.sq_idx;
1056
1057         io_sq->db_addr = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1058                 (uintptr_t)cmd_completion.sq_doorbell_offset);
1059
1060         if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
1061                 io_sq->header_addr = (u8 __iomem *)((uintptr_t)ena_dev->mem_bar
1062                                 + cmd_completion.llq_headers_offset);
1063
1064                 io_sq->desc_addr.pbuf_dev_addr =
1065                         (u8 __iomem *)((uintptr_t)ena_dev->mem_bar +
1066                         cmd_completion.llq_descriptors_offset);
1067         }
1068
1069         ena_trc_dbg("created sq[%u], depth[%u]\n", io_sq->idx, io_sq->q_depth);
1070
1071         return ret;
1072 }
1073
1074 static int ena_com_ind_tbl_convert_to_device(struct ena_com_dev *ena_dev)
1075 {
1076         struct ena_rss *rss = &ena_dev->rss;
1077         struct ena_com_io_sq *io_sq;
1078         u16 qid;
1079         int i;
1080
1081         for (i = 0; i < 1 << rss->tbl_log_size; i++) {
1082                 qid = rss->host_rss_ind_tbl[i];
1083                 if (qid >= ENA_TOTAL_NUM_QUEUES)
1084                         return ENA_COM_INVAL;
1085
1086                 io_sq = &ena_dev->io_sq_queues[qid];
1087
1088                 if (io_sq->direction != ENA_COM_IO_QUEUE_DIRECTION_RX)
1089                         return ENA_COM_INVAL;
1090
1091                 rss->rss_ind_tbl[i].cq_idx = io_sq->idx;
1092         }
1093
1094         return 0;
1095 }
1096
1097 static int ena_com_ind_tbl_convert_from_device(struct ena_com_dev *ena_dev)
1098 {
1099         u16 dev_idx_to_host_tbl[ENA_TOTAL_NUM_QUEUES] = { (u16)-1 };
1100         struct ena_rss *rss = &ena_dev->rss;
1101         u8 idx;
1102         u16 i;
1103
1104         for (i = 0; i < ENA_TOTAL_NUM_QUEUES; i++)
1105                 dev_idx_to_host_tbl[ena_dev->io_sq_queues[i].idx] = i;
1106
1107         for (i = 0; i < 1 << rss->tbl_log_size; i++) {
1108                 if (rss->rss_ind_tbl[i].cq_idx > ENA_TOTAL_NUM_QUEUES)
1109                         return ENA_COM_INVAL;
1110                 idx = (u8)rss->rss_ind_tbl[i].cq_idx;
1111
1112                 if (dev_idx_to_host_tbl[idx] > ENA_TOTAL_NUM_QUEUES)
1113                         return ENA_COM_INVAL;
1114
1115                 rss->host_rss_ind_tbl[i] = dev_idx_to_host_tbl[idx];
1116         }
1117
1118         return 0;
1119 }
1120
1121 static int ena_com_init_interrupt_moderation_table(struct ena_com_dev *ena_dev)
1122 {
1123         size_t size;
1124
1125         size = sizeof(struct ena_intr_moder_entry) * ENA_INTR_MAX_NUM_OF_LEVELS;
1126
1127         ena_dev->intr_moder_tbl = ENA_MEM_ALLOC(ena_dev->dmadev, size);
1128         if (!ena_dev->intr_moder_tbl)
1129                 return ENA_COM_NO_MEM;
1130
1131         ena_com_config_default_interrupt_moderation_table(ena_dev);
1132
1133         return 0;
1134 }
1135
1136 static void
1137 ena_com_update_intr_delay_resolution(struct ena_com_dev *ena_dev,
1138                                      u16 intr_delay_resolution)
1139 {
1140         struct ena_intr_moder_entry *intr_moder_tbl = ena_dev->intr_moder_tbl;
1141         unsigned int i;
1142
1143         if (!intr_delay_resolution) {
1144                 ena_trc_err("Illegal intr_delay_resolution provided. Going to use default 1 usec resolution\n");
1145                 intr_delay_resolution = 1;
1146         }
1147         ena_dev->intr_delay_resolution = intr_delay_resolution;
1148
1149         /* update Rx */
1150         for (i = 0; i < ENA_INTR_MAX_NUM_OF_LEVELS; i++)
1151                 intr_moder_tbl[i].intr_moder_interval /= intr_delay_resolution;
1152
1153         /* update Tx */
1154         ena_dev->intr_moder_tx_interval /= intr_delay_resolution;
1155 }
1156
1157 /*****************************************************************************/
1158 /*******************************      API       ******************************/
1159 /*****************************************************************************/
1160
1161 int ena_com_execute_admin_command(struct ena_com_admin_queue *admin_queue,
1162                                   struct ena_admin_aq_entry *cmd,
1163                                   size_t cmd_size,
1164                                   struct ena_admin_acq_entry *comp,
1165                                   size_t comp_size)
1166 {
1167         struct ena_comp_ctx *comp_ctx;
1168         int ret = 0;
1169
1170         comp_ctx = ena_com_submit_admin_cmd(admin_queue, cmd, cmd_size,
1171                                             comp, comp_size);
1172         if (unlikely(IS_ERR(comp_ctx))) {
1173                 ena_trc_err("Failed to submit command [%ld]\n",
1174                             PTR_ERR(comp_ctx));
1175                 return PTR_ERR(comp_ctx);
1176         }
1177
1178         ret = ena_com_wait_and_process_admin_cq(comp_ctx, admin_queue);
1179         if (unlikely(ret)) {
1180                 if (admin_queue->running_state)
1181                         ena_trc_err("Failed to process command. ret = %d\n",
1182                                     ret);
1183                 else
1184                         ena_trc_dbg("Failed to process command. ret = %d\n",
1185                                     ret);
1186         }
1187         return ret;
1188 }
1189
1190 int ena_com_create_io_cq(struct ena_com_dev *ena_dev,
1191                          struct ena_com_io_cq *io_cq)
1192 {
1193         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1194         struct ena_admin_aq_create_cq_cmd create_cmd;
1195         struct ena_admin_acq_create_cq_resp_desc cmd_completion;
1196         int ret;
1197
1198         memset(&create_cmd, 0x0, sizeof(struct ena_admin_aq_create_cq_cmd));
1199
1200         create_cmd.aq_common_descriptor.opcode = ENA_ADMIN_CREATE_CQ;
1201
1202         create_cmd.cq_caps_2 |= (io_cq->cdesc_entry_size_in_bytes / 4) &
1203                 ENA_ADMIN_AQ_CREATE_CQ_CMD_CQ_ENTRY_SIZE_WORDS_MASK;
1204         create_cmd.cq_caps_1 |=
1205                 ENA_ADMIN_AQ_CREATE_CQ_CMD_INTERRUPT_MODE_ENABLED_MASK;
1206
1207         create_cmd.msix_vector = io_cq->msix_vector;
1208         create_cmd.cq_depth = io_cq->q_depth;
1209
1210         ret = ena_com_mem_addr_set(ena_dev,
1211                                    &create_cmd.cq_ba,
1212                                    io_cq->cdesc_addr.phys_addr);
1213         if (unlikely(ret)) {
1214                 ena_trc_err("memory address set failed\n");
1215                 return ret;
1216         }
1217
1218         ret = ena_com_execute_admin_command(
1219                         admin_queue,
1220                         (struct ena_admin_aq_entry *)&create_cmd,
1221                         sizeof(create_cmd),
1222                         (struct ena_admin_acq_entry *)&cmd_completion,
1223                         sizeof(cmd_completion));
1224         if (unlikely(ret)) {
1225                 ena_trc_err("Failed to create IO CQ. error: %d\n", ret);
1226                 return ret;
1227         }
1228
1229         io_cq->idx = cmd_completion.cq_idx;
1230
1231         io_cq->unmask_reg = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1232                 cmd_completion.cq_interrupt_unmask_register_offset);
1233
1234         if (cmd_completion.cq_head_db_register_offset)
1235                 io_cq->cq_head_db_reg =
1236                         (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1237                         cmd_completion.cq_head_db_register_offset);
1238
1239         if (cmd_completion.numa_node_register_offset)
1240                 io_cq->numa_node_cfg_reg =
1241                         (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1242                         cmd_completion.numa_node_register_offset);
1243
1244         ena_trc_dbg("created cq[%u], depth[%u]\n", io_cq->idx, io_cq->q_depth);
1245
1246         return ret;
1247 }
1248
1249 int ena_com_get_io_handlers(struct ena_com_dev *ena_dev, u16 qid,
1250                             struct ena_com_io_sq **io_sq,
1251                             struct ena_com_io_cq **io_cq)
1252 {
1253         if (qid >= ENA_TOTAL_NUM_QUEUES) {
1254                 ena_trc_err("Invalid queue number %d but the max is %d\n",
1255                             qid, ENA_TOTAL_NUM_QUEUES);
1256                 return ENA_COM_INVAL;
1257         }
1258
1259         *io_sq = &ena_dev->io_sq_queues[qid];
1260         *io_cq = &ena_dev->io_cq_queues[qid];
1261
1262         return 0;
1263 }
1264
1265 void ena_com_abort_admin_commands(struct ena_com_dev *ena_dev)
1266 {
1267         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1268         struct ena_comp_ctx *comp_ctx;
1269         u16 i;
1270
1271         if (!admin_queue->comp_ctx)
1272                 return;
1273
1274         for (i = 0; i < admin_queue->q_depth; i++) {
1275                 comp_ctx = get_comp_ctxt(admin_queue, i, false);
1276                 if (unlikely(!comp_ctx))
1277                         break;
1278
1279                 comp_ctx->status = ENA_CMD_ABORTED;
1280
1281                 ENA_WAIT_EVENT_SIGNAL(comp_ctx->wait_event);
1282         }
1283 }
1284
1285 void ena_com_wait_for_abort_completion(struct ena_com_dev *ena_dev)
1286 {
1287         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1288         unsigned long flags = 0;
1289
1290         ENA_SPINLOCK_LOCK(admin_queue->q_lock, flags);
1291         while (ATOMIC32_READ(&admin_queue->outstanding_cmds) != 0) {
1292                 ENA_SPINLOCK_UNLOCK(admin_queue->q_lock, flags);
1293                 ENA_MSLEEP(20);
1294                 ENA_SPINLOCK_LOCK(admin_queue->q_lock, flags);
1295         }
1296         ENA_SPINLOCK_UNLOCK(admin_queue->q_lock, flags);
1297 }
1298
1299 int ena_com_destroy_io_cq(struct ena_com_dev *ena_dev,
1300                           struct ena_com_io_cq *io_cq)
1301 {
1302         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1303         struct ena_admin_aq_destroy_cq_cmd destroy_cmd;
1304         struct ena_admin_acq_destroy_cq_resp_desc destroy_resp;
1305         int ret;
1306
1307         memset(&destroy_cmd, 0x0, sizeof(struct ena_admin_aq_destroy_sq_cmd));
1308
1309         destroy_cmd.cq_idx = io_cq->idx;
1310         destroy_cmd.aq_common_descriptor.opcode = ENA_ADMIN_DESTROY_CQ;
1311
1312         ret = ena_com_execute_admin_command(
1313                         admin_queue,
1314                         (struct ena_admin_aq_entry *)&destroy_cmd,
1315                         sizeof(destroy_cmd),
1316                         (struct ena_admin_acq_entry *)&destroy_resp,
1317                         sizeof(destroy_resp));
1318
1319         if (unlikely(ret && (ret != ENA_COM_NO_DEVICE)))
1320                 ena_trc_err("Failed to destroy IO CQ. error: %d\n", ret);
1321
1322         return ret;
1323 }
1324
1325 bool ena_com_get_admin_running_state(struct ena_com_dev *ena_dev)
1326 {
1327         return ena_dev->admin_queue.running_state;
1328 }
1329
1330 void ena_com_set_admin_running_state(struct ena_com_dev *ena_dev, bool state)
1331 {
1332         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1333         unsigned long flags = 0;
1334
1335         ENA_SPINLOCK_LOCK(admin_queue->q_lock, flags);
1336         ena_dev->admin_queue.running_state = state;
1337         ENA_SPINLOCK_UNLOCK(admin_queue->q_lock, flags);
1338 }
1339
1340 void ena_com_admin_aenq_enable(struct ena_com_dev *ena_dev)
1341 {
1342         u16 depth = ena_dev->aenq.q_depth;
1343
1344         ENA_ASSERT(ena_dev->aenq.head == depth, "Invalid AENQ state\n");
1345
1346         /* Init head_db to mark that all entries in the queue
1347          * are initially available
1348          */
1349         ENA_REG_WRITE32(depth, (unsigned char *)ena_dev->reg_bar
1350                         + ENA_REGS_AENQ_HEAD_DB_OFF);
1351 }
1352
1353 int ena_com_set_aenq_config(struct ena_com_dev *ena_dev, u32 groups_flag)
1354 {
1355         struct ena_com_admin_queue *admin_queue;
1356         struct ena_admin_set_feat_cmd cmd;
1357         struct ena_admin_set_feat_resp resp;
1358         struct ena_admin_get_feat_resp get_resp;
1359         int ret = 0;
1360
1361         if (unlikely(!ena_dev)) {
1362                 ena_trc_err("%s : ena_dev is NULL\n", __func__);
1363                 return ENA_COM_NO_DEVICE;
1364         }
1365
1366         ret = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_AENQ_CONFIG);
1367         if (ret) {
1368                 ena_trc_info("Can't get aenq configuration\n");
1369                 return ret;
1370         }
1371
1372         if ((get_resp.u.aenq.supported_groups & groups_flag) != groups_flag) {
1373                 ena_trc_warn("Trying to set unsupported aenq events. supported flag: %x asked flag: %x\n",
1374                              get_resp.u.aenq.supported_groups,
1375                              groups_flag);
1376                 return ENA_COM_PERMISSION;
1377         }
1378
1379         memset(&cmd, 0x0, sizeof(cmd));
1380         admin_queue = &ena_dev->admin_queue;
1381
1382         cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
1383         cmd.aq_common_descriptor.flags = 0;
1384         cmd.feat_common.feature_id = ENA_ADMIN_AENQ_CONFIG;
1385         cmd.u.aenq.enabled_groups = groups_flag;
1386
1387         ret = ena_com_execute_admin_command(admin_queue,
1388                                             (struct ena_admin_aq_entry *)&cmd,
1389                                             sizeof(cmd),
1390                                             (struct ena_admin_acq_entry *)&resp,
1391                                             sizeof(resp));
1392
1393         if (unlikely(ret))
1394                 ena_trc_err("Failed to config AENQ ret: %d\n", ret);
1395
1396         return ret;
1397 }
1398
1399 int ena_com_get_dma_width(struct ena_com_dev *ena_dev)
1400 {
1401         u32 caps = ena_com_reg_bar_read32(ena_dev, ENA_REGS_CAPS_OFF);
1402         int width;
1403
1404         if (unlikely(caps == ENA_MMIO_READ_TIMEOUT)) {
1405                 ena_trc_err("Reg read timeout occurred\n");
1406                 return ENA_COM_TIMER_EXPIRED;
1407         }
1408
1409         width = (caps & ENA_REGS_CAPS_DMA_ADDR_WIDTH_MASK) >>
1410                 ENA_REGS_CAPS_DMA_ADDR_WIDTH_SHIFT;
1411
1412         ena_trc_dbg("ENA dma width: %d\n", width);
1413
1414         if ((width < 32) || width > ENA_MAX_PHYS_ADDR_SIZE_BITS) {
1415                 ena_trc_err("DMA width illegal value: %d\n", width);
1416                 return ENA_COM_INVAL;
1417         }
1418
1419         ena_dev->dma_addr_bits = width;
1420
1421         return width;
1422 }
1423
1424 int ena_com_validate_version(struct ena_com_dev *ena_dev)
1425 {
1426         u32 ver;
1427         u32 ctrl_ver;
1428         u32 ctrl_ver_masked;
1429
1430         /* Make sure the ENA version and the controller version are at least
1431          * as the driver expects
1432          */
1433         ver = ena_com_reg_bar_read32(ena_dev, ENA_REGS_VERSION_OFF);
1434         ctrl_ver = ena_com_reg_bar_read32(ena_dev,
1435                                           ENA_REGS_CONTROLLER_VERSION_OFF);
1436
1437         if (unlikely((ver == ENA_MMIO_READ_TIMEOUT) ||
1438                      (ctrl_ver == ENA_MMIO_READ_TIMEOUT))) {
1439                 ena_trc_err("Reg read timeout occurred\n");
1440                 return ENA_COM_TIMER_EXPIRED;
1441         }
1442
1443         ena_trc_info("ena device version: %d.%d\n",
1444                      (ver & ENA_REGS_VERSION_MAJOR_VERSION_MASK) >>
1445                      ENA_REGS_VERSION_MAJOR_VERSION_SHIFT,
1446                      ver & ENA_REGS_VERSION_MINOR_VERSION_MASK);
1447
1448         if (ver < MIN_ENA_VER) {
1449                 ena_trc_err("ENA version is lower than the minimal version the driver supports\n");
1450                 return -1;
1451         }
1452
1453         ena_trc_info("ena controller version: %d.%d.%d implementation version %d\n",
1454                      (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_MASK)
1455                      >> ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_SHIFT,
1456                      (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_MASK)
1457                      >> ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_SHIFT,
1458                      (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_SUBMINOR_VERSION_MASK),
1459                      (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_IMPL_ID_MASK) >>
1460                      ENA_REGS_CONTROLLER_VERSION_IMPL_ID_SHIFT);
1461
1462         ctrl_ver_masked =
1463                 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_MASK) |
1464                 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_MASK) |
1465                 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_SUBMINOR_VERSION_MASK);
1466
1467         /* Validate the ctrl version without the implementation ID */
1468         if (ctrl_ver_masked < MIN_ENA_CTRL_VER) {
1469                 ena_trc_err("ENA ctrl version is lower than the minimal ctrl version the driver supports\n");
1470                 return -1;
1471         }
1472
1473         return 0;
1474 }
1475
1476 void ena_com_admin_destroy(struct ena_com_dev *ena_dev)
1477 {
1478         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1479
1480         if (!admin_queue)
1481                 return;
1482
1483         if (admin_queue->comp_ctx)
1484                 ENA_MEM_FREE(ena_dev->dmadev, admin_queue->comp_ctx);
1485         admin_queue->comp_ctx = NULL;
1486
1487         if (admin_queue->sq.entries)
1488                 ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
1489                                       ADMIN_SQ_SIZE(admin_queue->q_depth),
1490                                       admin_queue->sq.entries,
1491                                       admin_queue->sq.dma_addr,
1492                                       admin_queue->sq.mem_handle);
1493         admin_queue->sq.entries = NULL;
1494
1495         if (admin_queue->cq.entries)
1496                 ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
1497                                       ADMIN_CQ_SIZE(admin_queue->q_depth),
1498                                       admin_queue->cq.entries,
1499                                       admin_queue->cq.dma_addr,
1500                                       admin_queue->cq.mem_handle);
1501         admin_queue->cq.entries = NULL;
1502
1503         if (ena_dev->aenq.entries)
1504                 ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
1505                                       ADMIN_AENQ_SIZE(ena_dev->aenq.q_depth),
1506                                       ena_dev->aenq.entries,
1507                                       ena_dev->aenq.dma_addr,
1508                                       ena_dev->aenq.mem_handle);
1509         ena_dev->aenq.entries = NULL;
1510 }
1511
1512 void ena_com_set_admin_polling_mode(struct ena_com_dev *ena_dev, bool polling)
1513 {
1514         ena_dev->admin_queue.polling = polling;
1515 }
1516
1517 int ena_com_mmio_reg_read_request_init(struct ena_com_dev *ena_dev)
1518 {
1519         struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1520
1521         ENA_SPINLOCK_INIT(mmio_read->lock);
1522         ENA_MEM_ALLOC_COHERENT(ena_dev->dmadev,
1523                                sizeof(*mmio_read->read_resp),
1524                                mmio_read->read_resp,
1525                                mmio_read->read_resp_dma_addr,
1526                                mmio_read->read_resp_mem_handle);
1527         if (unlikely(!mmio_read->read_resp))
1528                 return ENA_COM_NO_MEM;
1529
1530         ena_com_mmio_reg_read_request_write_dev_addr(ena_dev);
1531
1532         mmio_read->read_resp->req_id = 0x0;
1533         mmio_read->seq_num = 0x0;
1534         mmio_read->readless_supported = true;
1535
1536         return 0;
1537 }
1538
1539 void
1540 ena_com_set_mmio_read_mode(struct ena_com_dev *ena_dev, bool readless_supported)
1541 {
1542         struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1543
1544         mmio_read->readless_supported = readless_supported;
1545 }
1546
1547 void ena_com_mmio_reg_read_request_destroy(struct ena_com_dev *ena_dev)
1548 {
1549         struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1550
1551         ENA_REG_WRITE32(0x0, (unsigned char *)ena_dev->reg_bar
1552                         + ENA_REGS_MMIO_RESP_LO_OFF);
1553         ENA_REG_WRITE32(0x0, (unsigned char *)ena_dev->reg_bar
1554                         + ENA_REGS_MMIO_RESP_HI_OFF);
1555
1556         ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
1557                               sizeof(*mmio_read->read_resp),
1558                               mmio_read->read_resp,
1559                               mmio_read->read_resp_dma_addr,
1560                               mmio_read->read_resp_mem_handle);
1561
1562         mmio_read->read_resp = NULL;
1563 }
1564
1565 void ena_com_mmio_reg_read_request_write_dev_addr(struct ena_com_dev *ena_dev)
1566 {
1567         struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1568         u32 addr_low, addr_high;
1569
1570         addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(mmio_read->read_resp_dma_addr);
1571         addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(mmio_read->read_resp_dma_addr);
1572
1573         ENA_REG_WRITE32(addr_low, (unsigned char *)ena_dev->reg_bar
1574                         + ENA_REGS_MMIO_RESP_LO_OFF);
1575         ENA_REG_WRITE32(addr_high, (unsigned char *)ena_dev->reg_bar
1576                         + ENA_REGS_MMIO_RESP_HI_OFF);
1577 }
1578
1579 int ena_com_admin_init(struct ena_com_dev *ena_dev,
1580                        struct ena_aenq_handlers *aenq_handlers,
1581                        bool init_spinlock)
1582 {
1583         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1584         u32 aq_caps, acq_caps, dev_sts, addr_low, addr_high;
1585         int ret;
1586
1587         dev_sts = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
1588
1589         if (unlikely(dev_sts == ENA_MMIO_READ_TIMEOUT)) {
1590                 ena_trc_err("Reg read timeout occurred\n");
1591                 return ENA_COM_TIMER_EXPIRED;
1592         }
1593
1594         if (!(dev_sts & ENA_REGS_DEV_STS_READY_MASK)) {
1595                 ena_trc_err("Device isn't ready, abort com init\n");
1596                 return ENA_COM_NO_DEVICE;
1597         }
1598
1599         admin_queue->q_depth = ENA_ADMIN_QUEUE_DEPTH;
1600
1601         admin_queue->q_dmadev = ena_dev->dmadev;
1602         admin_queue->polling = false;
1603         admin_queue->curr_cmd_id = 0;
1604
1605         ATOMIC32_SET(&admin_queue->outstanding_cmds, 0);
1606
1607         if (init_spinlock)
1608                 ENA_SPINLOCK_INIT(admin_queue->q_lock);
1609
1610         ret = ena_com_init_comp_ctxt(admin_queue);
1611         if (ret)
1612                 goto error;
1613
1614         ret = ena_com_admin_init_sq(admin_queue);
1615         if (ret)
1616                 goto error;
1617
1618         ret = ena_com_admin_init_cq(admin_queue);
1619         if (ret)
1620                 goto error;
1621
1622         admin_queue->sq.db_addr = (u32 __iomem *)
1623                 ((unsigned char *)ena_dev->reg_bar + ENA_REGS_AQ_DB_OFF);
1624
1625         addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(admin_queue->sq.dma_addr);
1626         addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(admin_queue->sq.dma_addr);
1627
1628         ENA_REG_WRITE32(addr_low, (unsigned char *)ena_dev->reg_bar
1629                         + ENA_REGS_AQ_BASE_LO_OFF);
1630         ENA_REG_WRITE32(addr_high, (unsigned char *)ena_dev->reg_bar
1631                         + ENA_REGS_AQ_BASE_HI_OFF);
1632
1633         addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(admin_queue->cq.dma_addr);
1634         addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(admin_queue->cq.dma_addr);
1635
1636         ENA_REG_WRITE32(addr_low, (unsigned char *)ena_dev->reg_bar
1637                         + ENA_REGS_ACQ_BASE_LO_OFF);
1638         ENA_REG_WRITE32(addr_high, (unsigned char *)ena_dev->reg_bar
1639                         + ENA_REGS_ACQ_BASE_HI_OFF);
1640
1641         aq_caps = 0;
1642         aq_caps |= admin_queue->q_depth & ENA_REGS_AQ_CAPS_AQ_DEPTH_MASK;
1643         aq_caps |= (sizeof(struct ena_admin_aq_entry) <<
1644                         ENA_REGS_AQ_CAPS_AQ_ENTRY_SIZE_SHIFT) &
1645                         ENA_REGS_AQ_CAPS_AQ_ENTRY_SIZE_MASK;
1646
1647         acq_caps = 0;
1648         acq_caps |= admin_queue->q_depth & ENA_REGS_ACQ_CAPS_ACQ_DEPTH_MASK;
1649         acq_caps |= (sizeof(struct ena_admin_acq_entry) <<
1650                 ENA_REGS_ACQ_CAPS_ACQ_ENTRY_SIZE_SHIFT) &
1651                 ENA_REGS_ACQ_CAPS_ACQ_ENTRY_SIZE_MASK;
1652
1653         ENA_REG_WRITE32(aq_caps, (unsigned char *)ena_dev->reg_bar
1654                         + ENA_REGS_AQ_CAPS_OFF);
1655         ENA_REG_WRITE32(acq_caps, (unsigned char *)ena_dev->reg_bar
1656                         + ENA_REGS_ACQ_CAPS_OFF);
1657         ret = ena_com_admin_init_aenq(ena_dev, aenq_handlers);
1658         if (ret)
1659                 goto error;
1660
1661         admin_queue->running_state = true;
1662
1663         return 0;
1664 error:
1665         ena_com_admin_destroy(ena_dev);
1666
1667         return ret;
1668 }
1669
1670 int ena_com_create_io_queue(struct ena_com_dev *ena_dev,
1671                             struct ena_com_create_io_ctx *ctx)
1672 {
1673         struct ena_com_io_sq *io_sq;
1674         struct ena_com_io_cq *io_cq;
1675         int ret = 0;
1676
1677         if (ctx->qid >= ENA_TOTAL_NUM_QUEUES) {
1678                 ena_trc_err("Qid (%d) is bigger than max num of queues (%d)\n",
1679                             ctx->qid, ENA_TOTAL_NUM_QUEUES);
1680                 return ENA_COM_INVAL;
1681         }
1682
1683         io_sq = &ena_dev->io_sq_queues[ctx->qid];
1684         io_cq = &ena_dev->io_cq_queues[ctx->qid];
1685
1686         memset(io_sq, 0x0, sizeof(struct ena_com_io_sq));
1687         memset(io_cq, 0x0, sizeof(struct ena_com_io_cq));
1688
1689         /* Init CQ */
1690         io_cq->q_depth = ctx->queue_size;
1691         io_cq->direction = ctx->direction;
1692         io_cq->qid = ctx->qid;
1693
1694         io_cq->msix_vector = ctx->msix_vector;
1695
1696         io_sq->q_depth = ctx->queue_size;
1697         io_sq->direction = ctx->direction;
1698         io_sq->qid = ctx->qid;
1699
1700         io_sq->mem_queue_type = ctx->mem_queue_type;
1701
1702         if (ctx->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
1703                 /* header length is limited to 8 bits */
1704                 io_sq->tx_max_header_size =
1705                         ENA_MIN32(ena_dev->tx_max_header_size, SZ_256);
1706
1707         ret = ena_com_init_io_sq(ena_dev, ctx, io_sq);
1708         if (ret)
1709                 goto error;
1710         ret = ena_com_init_io_cq(ena_dev, ctx, io_cq);
1711         if (ret)
1712                 goto error;
1713
1714         ret = ena_com_create_io_cq(ena_dev, io_cq);
1715         if (ret)
1716                 goto error;
1717
1718         ret = ena_com_create_io_sq(ena_dev, io_sq, io_cq->idx);
1719         if (ret)
1720                 goto destroy_io_cq;
1721
1722         return 0;
1723
1724 destroy_io_cq:
1725         ena_com_destroy_io_cq(ena_dev, io_cq);
1726 error:
1727         ena_com_io_queue_free(ena_dev, io_sq, io_cq);
1728         return ret;
1729 }
1730
1731 void ena_com_destroy_io_queue(struct ena_com_dev *ena_dev, u16 qid)
1732 {
1733         struct ena_com_io_sq *io_sq;
1734         struct ena_com_io_cq *io_cq;
1735
1736         if (qid >= ENA_TOTAL_NUM_QUEUES) {
1737                 ena_trc_err("Qid (%d) is bigger than max num of queues (%d)\n",
1738                             qid, ENA_TOTAL_NUM_QUEUES);
1739                 return;
1740         }
1741
1742         io_sq = &ena_dev->io_sq_queues[qid];
1743         io_cq = &ena_dev->io_cq_queues[qid];
1744
1745         ena_com_destroy_io_sq(ena_dev, io_sq);
1746         ena_com_destroy_io_cq(ena_dev, io_cq);
1747
1748         ena_com_io_queue_free(ena_dev, io_sq, io_cq);
1749 }
1750
1751 int ena_com_get_link_params(struct ena_com_dev *ena_dev,
1752                             struct ena_admin_get_feat_resp *resp)
1753 {
1754         return ena_com_get_feature(ena_dev, resp, ENA_ADMIN_LINK_CONFIG);
1755 }
1756
1757 int ena_com_get_dev_attr_feat(struct ena_com_dev *ena_dev,
1758                               struct ena_com_dev_get_features_ctx *get_feat_ctx)
1759 {
1760         struct ena_admin_get_feat_resp get_resp;
1761         int rc;
1762
1763         rc = ena_com_get_feature(ena_dev, &get_resp,
1764                                  ENA_ADMIN_DEVICE_ATTRIBUTES);
1765         if (rc)
1766                 return rc;
1767
1768         memcpy(&get_feat_ctx->dev_attr, &get_resp.u.dev_attr,
1769                sizeof(get_resp.u.dev_attr));
1770         ena_dev->supported_features = get_resp.u.dev_attr.supported_features;
1771
1772         rc = ena_com_get_feature(ena_dev, &get_resp,
1773                                  ENA_ADMIN_MAX_QUEUES_NUM);
1774         if (rc)
1775                 return rc;
1776
1777         memcpy(&get_feat_ctx->max_queues, &get_resp.u.max_queue,
1778                sizeof(get_resp.u.max_queue));
1779         ena_dev->tx_max_header_size = get_resp.u.max_queue.max_header_size;
1780
1781         rc = ena_com_get_feature(ena_dev, &get_resp,
1782                                  ENA_ADMIN_AENQ_CONFIG);
1783         if (rc)
1784                 return rc;
1785
1786         memcpy(&get_feat_ctx->aenq, &get_resp.u.aenq,
1787                sizeof(get_resp.u.aenq));
1788
1789         rc = ena_com_get_feature(ena_dev, &get_resp,
1790                                  ENA_ADMIN_STATELESS_OFFLOAD_CONFIG);
1791         if (rc)
1792                 return rc;
1793
1794         memcpy(&get_feat_ctx->offload, &get_resp.u.offload,
1795                sizeof(get_resp.u.offload));
1796
1797         return 0;
1798 }
1799
1800 void ena_com_admin_q_comp_intr_handler(struct ena_com_dev *ena_dev)
1801 {
1802         ena_com_handle_admin_completion(&ena_dev->admin_queue);
1803 }
1804
1805 /* ena_handle_specific_aenq_event:
1806  * return the handler that is relevant to the specific event group
1807  */
1808 static ena_aenq_handler ena_com_get_specific_aenq_cb(struct ena_com_dev *dev,
1809                                                      u16 group)
1810 {
1811         struct ena_aenq_handlers *aenq_handlers = dev->aenq.aenq_handlers;
1812
1813         if ((group < ENA_MAX_HANDLERS) && aenq_handlers->handlers[group])
1814                 return aenq_handlers->handlers[group];
1815
1816         return aenq_handlers->unimplemented_handler;
1817 }
1818
1819 /* ena_aenq_intr_handler:
1820  * handles the aenq incoming events.
1821  * pop events from the queue and apply the specific handler
1822  */
1823 void ena_com_aenq_intr_handler(struct ena_com_dev *dev, void *data)
1824 {
1825         struct ena_admin_aenq_entry *aenq_e;
1826         struct ena_admin_aenq_common_desc *aenq_common;
1827         struct ena_com_aenq *aenq  = &dev->aenq;
1828         ena_aenq_handler handler_cb;
1829         u16 masked_head, processed = 0;
1830         u8 phase;
1831
1832         masked_head = aenq->head & (aenq->q_depth - 1);
1833         phase = aenq->phase;
1834         aenq_e = &aenq->entries[masked_head]; /* Get first entry */
1835         aenq_common = &aenq_e->aenq_common_desc;
1836
1837         /* Go over all the events */
1838         while ((aenq_common->flags & ENA_ADMIN_AENQ_COMMON_DESC_PHASE_MASK) ==
1839                 phase) {
1840                 ena_trc_dbg("AENQ! Group[%x] Syndrom[%x] timestamp: [%llus]\n",
1841                             aenq_common->group,
1842                             aenq_common->syndrom,
1843                             (unsigned long long)aenq_common->timestamp_low +
1844                             ((u64)aenq_common->timestamp_high << 32));
1845
1846                 /* Handle specific event*/
1847                 handler_cb = ena_com_get_specific_aenq_cb(dev,
1848                                                           aenq_common->group);
1849                 handler_cb(data, aenq_e); /* call the actual event handler*/
1850
1851                 /* Get next event entry */
1852                 masked_head++;
1853                 processed++;
1854
1855                 if (unlikely(masked_head == aenq->q_depth)) {
1856                         masked_head = 0;
1857                         phase = !phase;
1858                 }
1859                 aenq_e = &aenq->entries[masked_head];
1860                 aenq_common = &aenq_e->aenq_common_desc;
1861         }
1862
1863         aenq->head += processed;
1864         aenq->phase = phase;
1865
1866         /* Don't update aenq doorbell if there weren't any processed events */
1867         if (!processed)
1868                 return;
1869
1870         /* write the aenq doorbell after all AENQ descriptors were read */
1871         mb();
1872         ENA_REG_WRITE32((u32)aenq->head, (unsigned char *)dev->reg_bar
1873                         + ENA_REGS_AENQ_HEAD_DB_OFF);
1874 }
1875
1876 int ena_com_dev_reset(struct ena_com_dev *ena_dev)
1877 {
1878         u32 stat, timeout, cap, reset_val;
1879         int rc;
1880
1881         stat = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
1882         cap = ena_com_reg_bar_read32(ena_dev, ENA_REGS_CAPS_OFF);
1883
1884         if (unlikely((stat == ENA_MMIO_READ_TIMEOUT) ||
1885                      (cap == ENA_MMIO_READ_TIMEOUT))) {
1886                 ena_trc_err("Reg read32 timeout occurred\n");
1887                 return ENA_COM_TIMER_EXPIRED;
1888         }
1889
1890         if ((stat & ENA_REGS_DEV_STS_READY_MASK) == 0) {
1891                 ena_trc_err("Device isn't ready, can't reset device\n");
1892                 return ENA_COM_INVAL;
1893         }
1894
1895         timeout = (cap & ENA_REGS_CAPS_RESET_TIMEOUT_MASK) >>
1896                         ENA_REGS_CAPS_RESET_TIMEOUT_SHIFT;
1897         if (timeout == 0) {
1898                 ena_trc_err("Invalid timeout value\n");
1899                 return ENA_COM_INVAL;
1900         }
1901
1902         /* start reset */
1903         reset_val = ENA_REGS_DEV_CTL_DEV_RESET_MASK;
1904         ENA_REG_WRITE32(reset_val, (unsigned char *)ena_dev->reg_bar
1905                         + ENA_REGS_DEV_CTL_OFF);
1906
1907         /* Write again the MMIO read request address */
1908         ena_com_mmio_reg_read_request_write_dev_addr(ena_dev);
1909
1910         rc = wait_for_reset_state(ena_dev, timeout,
1911                                   ENA_REGS_DEV_STS_RESET_IN_PROGRESS_MASK);
1912         if (rc != 0) {
1913                 ena_trc_err("Reset indication didn't turn on\n");
1914                 return rc;
1915         }
1916
1917         /* reset done */
1918         ENA_REG_WRITE32(0, (unsigned char *)ena_dev->reg_bar
1919                         + ENA_REGS_DEV_CTL_OFF);
1920         rc = wait_for_reset_state(ena_dev, timeout, 0);
1921         if (rc != 0) {
1922                 ena_trc_err("Reset indication didn't turn off\n");
1923                 return rc;
1924         }
1925
1926         return 0;
1927 }
1928
1929 static int ena_get_dev_stats(struct ena_com_dev *ena_dev,
1930                              struct ena_admin_aq_get_stats_cmd *get_cmd,
1931                              struct ena_admin_acq_get_stats_resp *get_resp,
1932                              enum ena_admin_get_stats_type type)
1933 {
1934         struct ena_com_admin_queue *admin_queue;
1935         int ret = 0;
1936
1937         if (!ena_dev) {
1938                 ena_trc_err("%s : ena_dev is NULL\n", __func__);
1939                 return ENA_COM_NO_DEVICE;
1940         }
1941
1942         admin_queue = &ena_dev->admin_queue;
1943
1944         get_cmd->aq_common_descriptor.opcode = ENA_ADMIN_GET_STATS;
1945         get_cmd->aq_common_descriptor.flags = 0;
1946         get_cmd->type = type;
1947
1948         ret =  ena_com_execute_admin_command(
1949                         admin_queue,
1950                         (struct ena_admin_aq_entry *)get_cmd,
1951                         sizeof(*get_cmd),
1952                         (struct ena_admin_acq_entry *)get_resp,
1953                         sizeof(*get_resp));
1954
1955         if (unlikely(ret))
1956                 ena_trc_err("Failed to get stats. error: %d\n", ret);
1957
1958         return ret;
1959 }
1960
1961 int ena_com_get_dev_basic_stats(struct ena_com_dev *ena_dev,
1962                                 struct ena_admin_basic_stats *stats)
1963 {
1964         int ret = 0;
1965         struct ena_admin_aq_get_stats_cmd get_cmd;
1966         struct ena_admin_acq_get_stats_resp get_resp;
1967
1968         memset(&get_cmd, 0x0, sizeof(get_cmd));
1969         ret = ena_get_dev_stats(ena_dev, &get_cmd, &get_resp,
1970                                 ENA_ADMIN_GET_STATS_TYPE_BASIC);
1971         if (likely(ret == 0))
1972                 memcpy(stats, &get_resp.basic_stats,
1973                        sizeof(get_resp.basic_stats));
1974
1975         return ret;
1976 }
1977
1978 int ena_com_get_dev_extended_stats(struct ena_com_dev *ena_dev, char *buff,
1979                                    u32 len)
1980 {
1981         int ret = 0;
1982         struct ena_admin_aq_get_stats_cmd get_cmd;
1983         struct ena_admin_acq_get_stats_resp get_resp;
1984         ena_mem_handle_t mem_handle = 0;
1985         void *virt_addr;
1986         dma_addr_t phys_addr;
1987
1988         ENA_MEM_ALLOC_COHERENT(ena_dev->dmadev, len,
1989                                virt_addr, phys_addr, mem_handle);
1990         if (!virt_addr) {
1991                 ret = ENA_COM_NO_MEM;
1992                 goto done;
1993         }
1994         memset(&get_cmd, 0x0, sizeof(get_cmd));
1995         ret = ena_com_mem_addr_set(ena_dev,
1996                                    &get_cmd.u.control_buffer.address,
1997                                    phys_addr);
1998         if (unlikely(ret)) {
1999                 ena_trc_err("memory address set failed\n");
2000                 return ret;
2001         }
2002         get_cmd.u.control_buffer.length = len;
2003
2004         get_cmd.device_id = ena_dev->stats_func;
2005         get_cmd.queue_idx = ena_dev->stats_queue;
2006
2007         ret = ena_get_dev_stats(ena_dev, &get_cmd, &get_resp,
2008                                 ENA_ADMIN_GET_STATS_TYPE_EXTENDED);
2009         if (ret < 0)
2010                 goto free_ext_stats_mem;
2011
2012         ret = snprintf(buff, len, "%s", (char *)virt_addr);
2013
2014 free_ext_stats_mem:
2015         ENA_MEM_FREE_COHERENT(ena_dev->dmadev, len, virt_addr, phys_addr,
2016                               mem_handle);
2017 done:
2018         return ret;
2019 }
2020
2021 int ena_com_set_dev_mtu(struct ena_com_dev *ena_dev, int mtu)
2022 {
2023         struct ena_com_admin_queue *admin_queue;
2024         struct ena_admin_set_feat_cmd cmd;
2025         struct ena_admin_set_feat_resp resp;
2026         int ret = 0;
2027
2028         if (unlikely(!ena_dev)) {
2029                 ena_trc_err("%s : ena_dev is NULL\n", __func__);
2030                 return ENA_COM_NO_DEVICE;
2031         }
2032
2033         if (!ena_com_check_supported_feature_id(ena_dev, ENA_ADMIN_MTU)) {
2034                 ena_trc_info("Feature %d isn't supported\n", ENA_ADMIN_MTU);
2035                 return ENA_COM_PERMISSION;
2036         }
2037
2038         memset(&cmd, 0x0, sizeof(cmd));
2039         admin_queue = &ena_dev->admin_queue;
2040
2041         cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2042         cmd.aq_common_descriptor.flags = 0;
2043         cmd.feat_common.feature_id = ENA_ADMIN_MTU;
2044         cmd.u.mtu.mtu = mtu;
2045
2046         ret = ena_com_execute_admin_command(admin_queue,
2047                                             (struct ena_admin_aq_entry *)&cmd,
2048                                             sizeof(cmd),
2049                                             (struct ena_admin_acq_entry *)&resp,
2050                                             sizeof(resp));
2051
2052         if (unlikely(ret)) {
2053                 ena_trc_err("Failed to set mtu %d. error: %d\n", mtu, ret);
2054                 return ENA_COM_INVAL;
2055         }
2056         return 0;
2057 }
2058
2059 int ena_com_get_offload_settings(struct ena_com_dev *ena_dev,
2060                                  struct ena_admin_feature_offload_desc *offload)
2061 {
2062         int ret;
2063         struct ena_admin_get_feat_resp resp;
2064
2065         ret = ena_com_get_feature(ena_dev, &resp,
2066                                   ENA_ADMIN_STATELESS_OFFLOAD_CONFIG);
2067         if (unlikely(ret)) {
2068                 ena_trc_err("Failed to get offload capabilities %d\n", ret);
2069                 return ENA_COM_INVAL;
2070         }
2071
2072         memcpy(offload, &resp.u.offload, sizeof(resp.u.offload));
2073
2074         return 0;
2075 }
2076
2077 int ena_com_set_hash_function(struct ena_com_dev *ena_dev)
2078 {
2079         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
2080         struct ena_rss *rss = &ena_dev->rss;
2081         struct ena_admin_set_feat_cmd cmd;
2082         struct ena_admin_set_feat_resp resp;
2083         struct ena_admin_get_feat_resp get_resp;
2084         int ret;
2085
2086         if (!ena_com_check_supported_feature_id(ena_dev,
2087                                                 ENA_ADMIN_RSS_HASH_FUNCTION)) {
2088                 ena_trc_info("Feature %d isn't supported\n",
2089                              ENA_ADMIN_RSS_HASH_FUNCTION);
2090                 return ENA_COM_PERMISSION;
2091         }
2092
2093         /* Validate hash function is supported */
2094         ret = ena_com_get_feature(ena_dev, &get_resp,
2095                                   ENA_ADMIN_RSS_HASH_FUNCTION);
2096         if (unlikely(ret))
2097                 return ret;
2098
2099         if (get_resp.u.flow_hash_func.supported_func & (1 << rss->hash_func)) {
2100                 ena_trc_err("Func hash %d isn't supported by device, abort\n",
2101                             rss->hash_func);
2102                 return ENA_COM_PERMISSION;
2103         }
2104
2105         memset(&cmd, 0x0, sizeof(cmd));
2106
2107         cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2108         cmd.aq_common_descriptor.flags =
2109                 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
2110         cmd.feat_common.feature_id = ENA_ADMIN_RSS_HASH_FUNCTION;
2111         cmd.u.flow_hash_func.init_val = rss->hash_init_val;
2112         cmd.u.flow_hash_func.selected_func = 1 << rss->hash_func;
2113
2114         ret = ena_com_mem_addr_set(ena_dev,
2115                                    &cmd.control_buffer.address,
2116                                    rss->hash_key_dma_addr);
2117         if (unlikely(ret)) {
2118                 ena_trc_err("memory address set failed\n");
2119                 return ret;
2120         }
2121
2122         cmd.control_buffer.length = sizeof(*rss->hash_key);
2123
2124         ret = ena_com_execute_admin_command(admin_queue,
2125                                             (struct ena_admin_aq_entry *)&cmd,
2126                                             sizeof(cmd),
2127                                             (struct ena_admin_acq_entry *)&resp,
2128                                             sizeof(resp));
2129         if (unlikely(ret)) {
2130                 ena_trc_err("Failed to set hash function %d. error: %d\n",
2131                             rss->hash_func, ret);
2132                 return ENA_COM_INVAL;
2133         }
2134
2135         return 0;
2136 }
2137
2138 int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
2139                                enum ena_admin_hash_functions func,
2140                                const u8 *key, u16 key_len, u32 init_val)
2141 {
2142         struct ena_rss *rss = &ena_dev->rss;
2143         struct ena_admin_get_feat_resp get_resp;
2144         struct ena_admin_feature_rss_flow_hash_control *hash_key =
2145                 rss->hash_key;
2146         int rc;
2147
2148         /* Make sure size is a mult of DWs */
2149         if (unlikely(key_len & 0x3))
2150                 return ENA_COM_INVAL;
2151
2152         rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2153                                     ENA_ADMIN_RSS_HASH_FUNCTION,
2154                                     rss->hash_key_dma_addr,
2155                                     sizeof(*rss->hash_key));
2156         if (unlikely(rc))
2157                 return rc;
2158
2159         if (!((1 << func) & get_resp.u.flow_hash_func.supported_func)) {
2160                 ena_trc_err("Flow hash function %d isn't supported\n", func);
2161                 return ENA_COM_PERMISSION;
2162         }
2163
2164         switch (func) {
2165         case ENA_ADMIN_TOEPLITZ:
2166                 if (key_len > sizeof(hash_key->key)) {
2167                         ena_trc_err("key len (%hu) is bigger than the max supported (%zu)\n",
2168                                     key_len, sizeof(hash_key->key));
2169                         return ENA_COM_INVAL;
2170                 }
2171
2172                 memcpy(hash_key->key, key, key_len);
2173                 rss->hash_init_val = init_val;
2174                 hash_key->keys_num = key_len >> 2;
2175                 break;
2176         case ENA_ADMIN_CRC32:
2177                 rss->hash_init_val = init_val;
2178                 break;
2179         default:
2180                 ena_trc_err("Invalid hash function (%d)\n", func);
2181                 return ENA_COM_INVAL;
2182         }
2183
2184         rc = ena_com_set_hash_function(ena_dev);
2185
2186         /* Restore the old function */
2187         if (unlikely(rc))
2188                 ena_com_get_hash_function(ena_dev, NULL, NULL);
2189
2190         return rc;
2191 }
2192
2193 int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
2194                               enum ena_admin_hash_functions *func,
2195                               u8 *key)
2196 {
2197         struct ena_rss *rss = &ena_dev->rss;
2198         struct ena_admin_get_feat_resp get_resp;
2199         struct ena_admin_feature_rss_flow_hash_control *hash_key =
2200                 rss->hash_key;
2201         int rc;
2202
2203         rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2204                                     ENA_ADMIN_RSS_HASH_FUNCTION,
2205                                     rss->hash_key_dma_addr,
2206                                     sizeof(*rss->hash_key));
2207         if (unlikely(rc))
2208                 return rc;
2209
2210         rss->hash_func = (enum ena_admin_hash_functions)get_resp.u.flow_hash_func.selected_func;
2211         if (func)
2212                 *func = rss->hash_func;
2213
2214         if (key)
2215                 memcpy(key, hash_key->key, (size_t)(hash_key->keys_num) << 2);
2216
2217         return 0;
2218 }
2219
2220 int ena_com_get_hash_ctrl(struct ena_com_dev *ena_dev,
2221                           enum ena_admin_flow_hash_proto proto,
2222                           u16 *fields)
2223 {
2224         struct ena_rss *rss = &ena_dev->rss;
2225         struct ena_admin_get_feat_resp get_resp;
2226         int rc;
2227
2228         rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2229                                     ENA_ADMIN_RSS_HASH_INPUT,
2230                                     rss->hash_ctrl_dma_addr,
2231                                     sizeof(*rss->hash_ctrl));
2232         if (unlikely(rc))
2233                 return rc;
2234
2235         if (fields)
2236                 *fields = rss->hash_ctrl->selected_fields[proto].fields;
2237
2238         return 0;
2239 }
2240
2241 int ena_com_set_hash_ctrl(struct ena_com_dev *ena_dev)
2242 {
2243         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
2244         struct ena_rss *rss = &ena_dev->rss;
2245         struct ena_admin_set_feat_cmd cmd;
2246         struct ena_admin_set_feat_resp resp;
2247         int ret;
2248
2249         if (!ena_com_check_supported_feature_id(ena_dev,
2250                                                 ENA_ADMIN_RSS_HASH_INPUT)) {
2251                 ena_trc_info("Feature %d isn't supported\n",
2252                              ENA_ADMIN_RSS_HASH_INPUT);
2253                 return ENA_COM_PERMISSION;
2254         }
2255
2256         cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2257         cmd.aq_common_descriptor.flags =
2258                 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
2259         cmd.feat_common.feature_id = ENA_ADMIN_RSS_HASH_INPUT;
2260         cmd.u.flow_hash_input.enabled_input_sort =
2261                 ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L3_SORT_MASK |
2262                 ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L4_SORT_MASK;
2263
2264         ret = ena_com_mem_addr_set(ena_dev,
2265                                    &cmd.control_buffer.address,
2266                                    rss->hash_ctrl_dma_addr);
2267         if (unlikely(ret)) {
2268                 ena_trc_err("memory address set failed\n");
2269                 return ret;
2270         }
2271         cmd.control_buffer.length =
2272                 sizeof(struct ena_admin_feature_rss_hash_control);
2273
2274         ret = ena_com_execute_admin_command(admin_queue,
2275                                             (struct ena_admin_aq_entry *)&cmd,
2276                                             sizeof(cmd),
2277                                             (struct ena_admin_acq_entry *)&resp,
2278                                             sizeof(resp));
2279         if (unlikely(ret)) {
2280                 ena_trc_err("Failed to set hash input. error: %d\n", ret);
2281                 return ENA_COM_INVAL;
2282         }
2283
2284         return 0;
2285 }
2286
2287 int ena_com_set_default_hash_ctrl(struct ena_com_dev *ena_dev)
2288 {
2289         struct ena_rss *rss = &ena_dev->rss;
2290         struct ena_admin_feature_rss_hash_control *hash_ctrl =
2291                 rss->hash_ctrl;
2292         u16 available_fields = 0;
2293         int rc, i;
2294
2295         /* Get the supported hash input */
2296         rc = ena_com_get_hash_ctrl(ena_dev, (enum ena_admin_flow_hash_proto)0, NULL);
2297         if (unlikely(rc))
2298                 return rc;
2299
2300         hash_ctrl->selected_fields[ENA_ADMIN_RSS_TCP4].fields =
2301                 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2302                 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2303
2304         hash_ctrl->selected_fields[ENA_ADMIN_RSS_UDP4].fields =
2305                 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2306                 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2307
2308         hash_ctrl->selected_fields[ENA_ADMIN_RSS_TCP6].fields =
2309                 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2310                 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2311
2312         hash_ctrl->selected_fields[ENA_ADMIN_RSS_UDP6].fields =
2313                 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2314                 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2315
2316         hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP4].fields =
2317                 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
2318
2319         hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP6].fields =
2320                 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
2321
2322         hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP4_FRAG].fields =
2323                 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
2324
2325         hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP4_FRAG].fields =
2326                 ENA_ADMIN_RSS_L2_DA | ENA_ADMIN_RSS_L2_SA;
2327
2328         for (i = 0; i < ENA_ADMIN_RSS_PROTO_NUM; i++) {
2329                 available_fields = hash_ctrl->selected_fields[i].fields &
2330                                 hash_ctrl->supported_fields[i].fields;
2331                 if (available_fields != hash_ctrl->selected_fields[i].fields) {
2332                         ena_trc_err("hash control doesn't support all the desire configuration. proto %x supported %x selected %x\n",
2333                                     i, hash_ctrl->supported_fields[i].fields,
2334                                     hash_ctrl->selected_fields[i].fields);
2335                         return ENA_COM_PERMISSION;
2336                 }
2337         }
2338
2339         rc = ena_com_set_hash_ctrl(ena_dev);
2340
2341         /* In case of failure, restore the old hash ctrl */
2342         if (unlikely(rc))
2343                 ena_com_get_hash_ctrl(ena_dev, (enum ena_admin_flow_hash_proto)0, NULL);
2344
2345         return rc;
2346 }
2347
2348 int ena_com_fill_hash_ctrl(struct ena_com_dev *ena_dev,
2349                            enum ena_admin_flow_hash_proto proto,
2350                            u16 hash_fields)
2351 {
2352         struct ena_rss *rss = &ena_dev->rss;
2353         struct ena_admin_feature_rss_hash_control *hash_ctrl = rss->hash_ctrl;
2354         u16 supported_fields;
2355         int rc;
2356
2357         if (proto >= ENA_ADMIN_RSS_PROTO_NUM) {
2358                 ena_trc_err("Invalid proto num (%u)\n", proto);
2359                 return ENA_COM_INVAL;
2360         }
2361
2362         /* Get the ctrl table */
2363         rc = ena_com_get_hash_ctrl(ena_dev, proto, NULL);
2364         if (unlikely(rc))
2365                 return rc;
2366
2367         /* Make sure all the fields are supported */
2368         supported_fields = hash_ctrl->supported_fields[proto].fields;
2369         if ((hash_fields & supported_fields) != hash_fields) {
2370                 ena_trc_err("proto %d doesn't support the required fields %x. supports only: %x\n",
2371                             proto, hash_fields, supported_fields);
2372         }
2373
2374         hash_ctrl->selected_fields[proto].fields = hash_fields;
2375
2376         rc = ena_com_set_hash_ctrl(ena_dev);
2377
2378         /* In case of failure, restore the old hash ctrl */
2379         if (unlikely(rc))
2380                 ena_com_get_hash_ctrl(ena_dev, (enum ena_admin_flow_hash_proto)0, NULL);
2381
2382         return 0;
2383 }
2384
2385 int ena_com_indirect_table_fill_entry(struct ena_com_dev *ena_dev,
2386                                       u16 entry_idx, u16 entry_value)
2387 {
2388         struct ena_rss *rss = &ena_dev->rss;
2389
2390         if (unlikely(entry_idx >= (1 << rss->tbl_log_size)))
2391                 return ENA_COM_INVAL;
2392
2393         if (unlikely((entry_value > ENA_TOTAL_NUM_QUEUES)))
2394                 return ENA_COM_INVAL;
2395
2396         rss->host_rss_ind_tbl[entry_idx] = entry_value;
2397
2398         return 0;
2399 }
2400
2401 int ena_com_indirect_table_set(struct ena_com_dev *ena_dev)
2402 {
2403         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
2404         struct ena_rss *rss = &ena_dev->rss;
2405         struct ena_admin_set_feat_cmd cmd;
2406         struct ena_admin_set_feat_resp resp;
2407         int ret = 0;
2408
2409         if (!ena_com_check_supported_feature_id(
2410                                 ena_dev,
2411                                 ENA_ADMIN_RSS_REDIRECTION_TABLE_CONFIG)) {
2412                 ena_trc_info("Feature %d isn't supported\n",
2413                              ENA_ADMIN_RSS_REDIRECTION_TABLE_CONFIG);
2414                 return ENA_COM_PERMISSION;
2415         }
2416
2417         ret = ena_com_ind_tbl_convert_to_device(ena_dev);
2418         if (ret) {
2419                 ena_trc_err("Failed to convert host indirection table to device table\n");
2420                 return ret;
2421         }
2422
2423         memset(&cmd, 0x0, sizeof(cmd));
2424
2425         cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2426         cmd.aq_common_descriptor.flags =
2427                 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
2428         cmd.feat_common.feature_id = ENA_ADMIN_RSS_REDIRECTION_TABLE_CONFIG;
2429         cmd.u.ind_table.size = rss->tbl_log_size;
2430         cmd.u.ind_table.inline_index = 0xFFFFFFFF;
2431
2432         ret = ena_com_mem_addr_set(ena_dev,
2433                                    &cmd.control_buffer.address,
2434                                    rss->rss_ind_tbl_dma_addr);
2435         if (unlikely(ret)) {
2436                 ena_trc_err("memory address set failed\n");
2437                 return ret;
2438         }
2439
2440         cmd.control_buffer.length = (1ULL << rss->tbl_log_size) *
2441                 sizeof(struct ena_admin_rss_ind_table_entry);
2442
2443         ret = ena_com_execute_admin_command(admin_queue,
2444                                             (struct ena_admin_aq_entry *)&cmd,
2445                                             sizeof(cmd),
2446                                             (struct ena_admin_acq_entry *)&resp,
2447                                             sizeof(resp));
2448
2449         if (unlikely(ret)) {
2450                 ena_trc_err("Failed to set indirect table. error: %d\n", ret);
2451                 return ENA_COM_INVAL;
2452         }
2453
2454         return 0;
2455 }
2456
2457 int ena_com_indirect_table_get(struct ena_com_dev *ena_dev, u32 *ind_tbl)
2458 {
2459         struct ena_rss *rss = &ena_dev->rss;
2460         struct ena_admin_get_feat_resp get_resp;
2461         u32 tbl_size;
2462         int i, rc;
2463
2464         tbl_size = (1ULL << rss->tbl_log_size) *
2465                 sizeof(struct ena_admin_rss_ind_table_entry);
2466
2467         rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2468                                     ENA_ADMIN_RSS_REDIRECTION_TABLE_CONFIG,
2469                                     rss->rss_ind_tbl_dma_addr,
2470                                     tbl_size);
2471         if (unlikely(rc))
2472                 return rc;
2473
2474         if (!ind_tbl)
2475                 return 0;
2476
2477         rc = ena_com_ind_tbl_convert_from_device(ena_dev);
2478         if (unlikely(rc))
2479                 return rc;
2480
2481         for (i = 0; i < (1 << rss->tbl_log_size); i++)
2482                 ind_tbl[i] = rss->host_rss_ind_tbl[i];
2483
2484         return 0;
2485 }
2486
2487 int ena_com_rss_init(struct ena_com_dev *ena_dev, u16 indr_tbl_log_size)
2488 {
2489         int rc;
2490
2491         memset(&ena_dev->rss, 0x0, sizeof(ena_dev->rss));
2492
2493         rc = ena_com_indirect_table_allocate(ena_dev, indr_tbl_log_size);
2494         if (unlikely(rc))
2495                 goto err_indr_tbl;
2496
2497         rc = ena_com_hash_key_allocate(ena_dev);
2498         if (unlikely(rc))
2499                 goto err_hash_key;
2500
2501         rc = ena_com_hash_ctrl_init(ena_dev);
2502         if (unlikely(rc))
2503                 goto err_hash_ctrl;
2504
2505         return 0;
2506
2507 err_hash_ctrl:
2508         ena_com_hash_key_destroy(ena_dev);
2509 err_hash_key:
2510         ena_com_indirect_table_destroy(ena_dev);
2511 err_indr_tbl:
2512
2513         return rc;
2514 }
2515
2516 void ena_com_rss_destroy(struct ena_com_dev *ena_dev)
2517 {
2518         ena_com_indirect_table_destroy(ena_dev);
2519         ena_com_hash_key_destroy(ena_dev);
2520         ena_com_hash_ctrl_destroy(ena_dev);
2521
2522         memset(&ena_dev->rss, 0x0, sizeof(ena_dev->rss));
2523 }
2524
2525 int ena_com_allocate_host_info(struct ena_com_dev *ena_dev)
2526 {
2527         struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2528
2529         ENA_MEM_ALLOC_COHERENT(ena_dev->dmadev,
2530                                SZ_4K,
2531                                host_attr->host_info,
2532                                host_attr->host_info_dma_addr,
2533                                host_attr->host_info_dma_handle);
2534         if (unlikely(!host_attr->host_info))
2535                 return ENA_COM_NO_MEM;
2536
2537         return 0;
2538 }
2539
2540 int ena_com_allocate_debug_area(struct ena_com_dev *ena_dev,
2541                                 u32 debug_area_size) {
2542         struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2543
2544                 ENA_MEM_ALLOC_COHERENT(ena_dev->dmadev,
2545                                        debug_area_size,
2546                                        host_attr->debug_area_virt_addr,
2547                                        host_attr->debug_area_dma_addr,
2548                                        host_attr->debug_area_dma_handle);
2549                 if (unlikely(!host_attr->debug_area_virt_addr)) {
2550                         host_attr->debug_area_size = 0;
2551                         return ENA_COM_NO_MEM;
2552         }
2553
2554         host_attr->debug_area_size = debug_area_size;
2555
2556         return 0;
2557 }
2558
2559 void ena_com_delete_host_info(struct ena_com_dev *ena_dev)
2560 {
2561         struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2562
2563         if (host_attr->host_info) {
2564                 ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
2565                                       SZ_4K,
2566                                       host_attr->host_info,
2567                                       host_attr->host_info_dma_addr,
2568                                       host_attr->host_info_dma_handle);
2569                 host_attr->host_info = NULL;
2570         }
2571 }
2572
2573 void ena_com_delete_debug_area(struct ena_com_dev *ena_dev)
2574 {
2575         struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2576
2577         if (host_attr->debug_area_virt_addr) {
2578                 ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
2579                                       host_attr->debug_area_size,
2580                                       host_attr->debug_area_virt_addr,
2581                                       host_attr->debug_area_dma_addr,
2582                                       host_attr->debug_area_dma_handle);
2583                 host_attr->debug_area_virt_addr = NULL;
2584         }
2585 }
2586
2587 int ena_com_set_host_attributes(struct ena_com_dev *ena_dev)
2588 {
2589         struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2590         struct ena_com_admin_queue *admin_queue;
2591         struct ena_admin_set_feat_cmd cmd;
2592         struct ena_admin_set_feat_resp resp;
2593         int ret;
2594
2595         /* Host attribute config is called before ena_com_get_dev_attr_feat
2596          * so ena_com can't check if the feature is supported.
2597          */
2598
2599         memset(&cmd, 0x0, sizeof(cmd));
2600         admin_queue = &ena_dev->admin_queue;
2601
2602         cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2603         cmd.feat_common.feature_id = ENA_ADMIN_HOST_ATTR_CONFIG;
2604
2605         ret = ena_com_mem_addr_set(ena_dev,
2606                                    &cmd.u.host_attr.debug_ba,
2607                                    host_attr->debug_area_dma_addr);
2608         if (unlikely(ret)) {
2609                 ena_trc_err("memory address set failed\n");
2610                 return ret;
2611         }
2612
2613         ret = ena_com_mem_addr_set(ena_dev,
2614                                    &cmd.u.host_attr.os_info_ba,
2615                                    host_attr->host_info_dma_addr);
2616         if (unlikely(ret)) {
2617                 ena_trc_err("memory address set failed\n");
2618                 return ret;
2619         }
2620
2621         cmd.u.host_attr.debug_area_size = host_attr->debug_area_size;
2622
2623         ret = ena_com_execute_admin_command(admin_queue,
2624                                             (struct ena_admin_aq_entry *)&cmd,
2625                                             sizeof(cmd),
2626                                             (struct ena_admin_acq_entry *)&resp,
2627                                             sizeof(resp));
2628
2629         if (unlikely(ret))
2630                 ena_trc_err("Failed to set host attributes: %d\n", ret);
2631
2632         return ret;
2633 }
2634
2635 /* Interrupt moderation */
2636 bool ena_com_interrupt_moderation_supported(struct ena_com_dev *ena_dev)
2637 {
2638         return ena_com_check_supported_feature_id(
2639                         ena_dev,
2640                         ENA_ADMIN_INTERRUPT_MODERATION);
2641 }
2642
2643 int
2644 ena_com_update_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev,
2645                                                   u32 tx_coalesce_usecs)
2646 {
2647         if (!ena_dev->intr_delay_resolution) {
2648                 ena_trc_err("Illegal interrupt delay granularity value\n");
2649                 return ENA_COM_FAULT;
2650         }
2651
2652         ena_dev->intr_moder_tx_interval = tx_coalesce_usecs /
2653                 ena_dev->intr_delay_resolution;
2654
2655         return 0;
2656 }
2657
2658 int
2659 ena_com_update_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev,
2660                                                   u32 rx_coalesce_usecs)
2661 {
2662         if (!ena_dev->intr_delay_resolution) {
2663                 ena_trc_err("Illegal interrupt delay granularity value\n");
2664                 return ENA_COM_FAULT;
2665         }
2666
2667         /* We use LOWEST entry of moderation table for storing
2668          * nonadaptive interrupt coalescing values
2669          */
2670         ena_dev->intr_moder_tbl[ENA_INTR_MODER_LOWEST].intr_moder_interval =
2671                 rx_coalesce_usecs / ena_dev->intr_delay_resolution;
2672
2673         return 0;
2674 }
2675
2676 void ena_com_destroy_interrupt_moderation(struct ena_com_dev *ena_dev)
2677 {
2678         if (ena_dev->intr_moder_tbl)
2679                 ENA_MEM_FREE(ena_dev->dmadev, ena_dev->intr_moder_tbl);
2680         ena_dev->intr_moder_tbl = NULL;
2681 }
2682
2683 int ena_com_init_interrupt_moderation(struct ena_com_dev *ena_dev)
2684 {
2685         struct ena_admin_get_feat_resp get_resp;
2686         u16 delay_resolution;
2687         int rc;
2688
2689         rc = ena_com_get_feature(ena_dev, &get_resp,
2690                                  ENA_ADMIN_INTERRUPT_MODERATION);
2691
2692         if (rc) {
2693                 if (rc == ENA_COM_PERMISSION) {
2694                         ena_trc_info("Feature %d isn't supported\n",
2695                                      ENA_ADMIN_INTERRUPT_MODERATION);
2696                         rc = 0;
2697                 } else {
2698                         ena_trc_err("Failed to get interrupt moderation admin cmd. rc: %d\n",
2699                                     rc);
2700                 }
2701
2702                 /* no moderation supported, disable adaptive support */
2703                 ena_com_disable_adaptive_moderation(ena_dev);
2704                 return rc;
2705         }
2706
2707         rc = ena_com_init_interrupt_moderation_table(ena_dev);
2708         if (rc)
2709                 goto err;
2710
2711         /* if moderation is supported by device we set adaptive moderation */
2712         delay_resolution = get_resp.u.intr_moderation.intr_delay_resolution;
2713         ena_com_update_intr_delay_resolution(ena_dev, delay_resolution);
2714         ena_com_enable_adaptive_moderation(ena_dev);
2715
2716         return 0;
2717 err:
2718         ena_com_destroy_interrupt_moderation(ena_dev);
2719         return rc;
2720 }
2721
2722 void
2723 ena_com_config_default_interrupt_moderation_table(struct ena_com_dev *ena_dev)
2724 {
2725         struct ena_intr_moder_entry *intr_moder_tbl = ena_dev->intr_moder_tbl;
2726
2727         if (!intr_moder_tbl)
2728                 return;
2729
2730         intr_moder_tbl[ENA_INTR_MODER_LOWEST].intr_moder_interval =
2731                 ENA_INTR_LOWEST_USECS;
2732         intr_moder_tbl[ENA_INTR_MODER_LOWEST].pkts_per_interval =
2733                 ENA_INTR_LOWEST_PKTS;
2734         intr_moder_tbl[ENA_INTR_MODER_LOWEST].bytes_per_interval =
2735                 ENA_INTR_LOWEST_BYTES;
2736
2737         intr_moder_tbl[ENA_INTR_MODER_LOW].intr_moder_interval =
2738                 ENA_INTR_LOW_USECS;
2739         intr_moder_tbl[ENA_INTR_MODER_LOW].pkts_per_interval =
2740                 ENA_INTR_LOW_PKTS;
2741         intr_moder_tbl[ENA_INTR_MODER_LOW].bytes_per_interval =
2742                 ENA_INTR_LOW_BYTES;
2743
2744         intr_moder_tbl[ENA_INTR_MODER_MID].intr_moder_interval =
2745                 ENA_INTR_MID_USECS;
2746         intr_moder_tbl[ENA_INTR_MODER_MID].pkts_per_interval =
2747                 ENA_INTR_MID_PKTS;
2748         intr_moder_tbl[ENA_INTR_MODER_MID].bytes_per_interval =
2749                 ENA_INTR_MID_BYTES;
2750
2751         intr_moder_tbl[ENA_INTR_MODER_HIGH].intr_moder_interval =
2752                 ENA_INTR_HIGH_USECS;
2753         intr_moder_tbl[ENA_INTR_MODER_HIGH].pkts_per_interval =
2754                 ENA_INTR_HIGH_PKTS;
2755         intr_moder_tbl[ENA_INTR_MODER_HIGH].bytes_per_interval =
2756                 ENA_INTR_HIGH_BYTES;
2757
2758         intr_moder_tbl[ENA_INTR_MODER_HIGHEST].intr_moder_interval =
2759                 ENA_INTR_HIGHEST_USECS;
2760         intr_moder_tbl[ENA_INTR_MODER_HIGHEST].pkts_per_interval =
2761                 ENA_INTR_HIGHEST_PKTS;
2762         intr_moder_tbl[ENA_INTR_MODER_HIGHEST].bytes_per_interval =
2763                 ENA_INTR_HIGHEST_BYTES;
2764 }
2765
2766 unsigned int
2767 ena_com_get_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev)
2768 {
2769         return ena_dev->intr_moder_tx_interval;
2770 }
2771
2772 unsigned int
2773 ena_com_get_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev)
2774 {
2775         struct ena_intr_moder_entry *intr_moder_tbl = ena_dev->intr_moder_tbl;
2776
2777         if (intr_moder_tbl)
2778                 return intr_moder_tbl[ENA_INTR_MODER_LOWEST].intr_moder_interval;
2779
2780         return 0;
2781 }
2782
2783 void ena_com_init_intr_moderation_entry(struct ena_com_dev *ena_dev,
2784                                         enum ena_intr_moder_level level,
2785                                         struct ena_intr_moder_entry *entry)
2786 {
2787         struct ena_intr_moder_entry *intr_moder_tbl = ena_dev->intr_moder_tbl;
2788
2789         if (level >= ENA_INTR_MAX_NUM_OF_LEVELS)
2790                 return;
2791
2792         intr_moder_tbl[level].intr_moder_interval = entry->intr_moder_interval;
2793         if (ena_dev->intr_delay_resolution)
2794                 intr_moder_tbl[level].intr_moder_interval /=
2795                         ena_dev->intr_delay_resolution;
2796         intr_moder_tbl[level].pkts_per_interval = entry->pkts_per_interval;
2797         intr_moder_tbl[level].bytes_per_interval = entry->bytes_per_interval;
2798 }
2799
2800 void ena_com_get_intr_moderation_entry(struct ena_com_dev *ena_dev,
2801                                        enum ena_intr_moder_level level,
2802                                        struct ena_intr_moder_entry *entry)
2803 {
2804         struct ena_intr_moder_entry *intr_moder_tbl = ena_dev->intr_moder_tbl;
2805
2806         if (level >= ENA_INTR_MAX_NUM_OF_LEVELS)
2807                 return;
2808
2809         entry->intr_moder_interval = intr_moder_tbl[level].intr_moder_interval;
2810         if (ena_dev->intr_delay_resolution)
2811                 entry->intr_moder_interval *= ena_dev->intr_delay_resolution;
2812         entry->pkts_per_interval =
2813         intr_moder_tbl[level].pkts_per_interval;
2814         entry->bytes_per_interval = intr_moder_tbl[level].bytes_per_interval;
2815 }