sys/contrib/ena-com/ena_com.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 2015-2020 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 (3000000)
  41
  42 #define ENA_ASYNC_QUEUE_DEPTH 16
  43 #define ENA_ADMIN_QUEUE_DEPTH 32
  44
  45 #ifdef ENA_EXTENDED_STATS
  46
  47 #define ENA_HISTOGRAM_ACTIVE_MASK_OFFSET 0xF08
  48 #define ENA_EXTENDED_STAT_GET_FUNCT(_funct_queue) (_funct_queue & 0xFFFF)
  49 #define ENA_EXTENDED_STAT_GET_QUEUE(_funct_queue) (_funct_queue >> 16)
  50
  51 #endif /* ENA_EXTENDED_STATS */
  52
  53 #define ENA_CTRL_MAJOR          0
  54 #define ENA_CTRL_MINOR          0
  55 #define ENA_CTRL_SUB_MINOR      1
  56
  57 #define MIN_ENA_CTRL_VER \
  58         (((ENA_CTRL_MAJOR) << \
  59         (ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_SHIFT)) | \
  60         ((ENA_CTRL_MINOR) << \
  61         (ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_SHIFT)) | \
  62         (ENA_CTRL_SUB_MINOR))
  63
  64 #define ENA_DMA_ADDR_TO_UINT32_LOW(x)   ((u32)((u64)(x)))
  65 #define ENA_DMA_ADDR_TO_UINT32_HIGH(x)  ((u32)(((u64)(x)) >> 32))
  66
  67 #define ENA_MMIO_READ_TIMEOUT 0xFFFFFFFF
  68
  69 #define ENA_COM_BOUNCE_BUFFER_CNTRL_CNT 4
  70
  71 #define ENA_REGS_ADMIN_INTR_MASK 1
  72
  73 #define ENA_MIN_ADMIN_POLL_US 100
  74
  75 #define ENA_MAX_ADMIN_POLL_US 5000
  76
  77 /*****************************************************************************/
  78 /*****************************************************************************/
  79 /*****************************************************************************/
  80
  81 enum ena_cmd_status {
  82         ENA_CMD_SUBMITTED,
  83         ENA_CMD_COMPLETED,
  84         /* Abort - canceled by the driver */
  85         ENA_CMD_ABORTED,
  86 };
  87
  88 struct ena_comp_ctx {
  89         ena_wait_event_t wait_event;
  90         struct ena_admin_acq_entry *user_cqe;
  91         u32 comp_size;
  92         enum ena_cmd_status status;
  93         /* status from the device */
  94         u8 comp_status;
  95         u8 cmd_opcode;
  96         bool occupied;
  97 };
  98
  99 struct ena_com_stats_ctx {
 100         struct ena_admin_aq_get_stats_cmd get_cmd;
 101         struct ena_admin_acq_get_stats_resp get_resp;
 102 };
 103
 104 static int ena_com_mem_addr_set(struct ena_com_dev *ena_dev,
 105                                        struct ena_common_mem_addr *ena_addr,
 106                                        dma_addr_t addr)
 107 {
 108         if ((addr & GENMASK_ULL(ena_dev->dma_addr_bits - 1, 0)) != addr) {
 109                 ena_trc_err(ena_dev, "DMA address has more bits that the device supports\n");
 110                 return ENA_COM_INVAL;
 111         }
 112
 113         ena_addr->mem_addr_low = lower_32_bits(addr);
 114         ena_addr->mem_addr_high = (u16)upper_32_bits(addr);
 115
 116         return 0;
 117 }
 118
 119 static int ena_com_admin_init_sq(struct ena_com_admin_queue *admin_queue)
 120 {
 121         struct ena_com_dev *ena_dev = admin_queue->ena_dev;
 122         struct ena_com_admin_sq *sq = &admin_queue->sq;
 123         u16 size = ADMIN_SQ_SIZE(admin_queue->q_depth);
 124
 125         ENA_MEM_ALLOC_COHERENT(admin_queue->q_dmadev, size, sq->entries, sq->dma_addr,
 126                                sq->mem_handle);
 127
 128         if (!sq->entries) {
 129                 ena_trc_err(ena_dev, "Memory allocation failed\n");
 130                 return ENA_COM_NO_MEM;
 131         }
 132
 133         sq->head = 0;
 134         sq->tail = 0;
 135         sq->phase = 1;
 136
 137         sq->db_addr = NULL;
 138
 139         return 0;
 140 }
 141
 142 static int ena_com_admin_init_cq(struct ena_com_admin_queue *admin_queue)
 143 {
 144         struct ena_com_dev *ena_dev = admin_queue->ena_dev;
 145         struct ena_com_admin_cq *cq = &admin_queue->cq;
 146         u16 size = ADMIN_CQ_SIZE(admin_queue->q_depth);
 147
 148         ENA_MEM_ALLOC_COHERENT(admin_queue->q_dmadev, size, cq->entries, cq->dma_addr,
 149                                cq->mem_handle);
 150
 151         if (!cq->entries)  {
 152                 ena_trc_err(ena_dev, "Memory allocation failed\n");
 153                 return ENA_COM_NO_MEM;
 154         }
 155
 156         cq->head = 0;
 157         cq->phase = 1;
 158
 159         return 0;
 160 }
 161
 162 static int ena_com_admin_init_aenq(struct ena_com_dev *ena_dev,
 163                                    struct ena_aenq_handlers *aenq_handlers)
 164 {
 165         struct ena_com_aenq *aenq = &ena_dev->aenq;
 166         u32 addr_low, addr_high, aenq_caps;
 167         u16 size;
 168
 169         ena_dev->aenq.q_depth = ENA_ASYNC_QUEUE_DEPTH;
 170         size = ADMIN_AENQ_SIZE(ENA_ASYNC_QUEUE_DEPTH);
 171         ENA_MEM_ALLOC_COHERENT(ena_dev->dmadev, size,
 172                         aenq->entries,
 173                         aenq->dma_addr,
 174                         aenq->mem_handle);
 175
 176         if (!aenq->entries) {
 177                 ena_trc_err(ena_dev, "Memory allocation failed\n");
 178                 return ENA_COM_NO_MEM;
 179         }
 180
 181         aenq->head = aenq->q_depth;
 182         aenq->phase = 1;
 183
 184         addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(aenq->dma_addr);
 185         addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(aenq->dma_addr);
 186
 187         ENA_REG_WRITE32(ena_dev->bus, addr_low, ena_dev->reg_bar + ENA_REGS_AENQ_BASE_LO_OFF);
 188         ENA_REG_WRITE32(ena_dev->bus, addr_high, ena_dev->reg_bar + ENA_REGS_AENQ_BASE_HI_OFF);
 189
 190         aenq_caps = 0;
 191         aenq_caps |= ena_dev->aenq.q_depth & ENA_REGS_AENQ_CAPS_AENQ_DEPTH_MASK;
 192         aenq_caps |= (sizeof(struct ena_admin_aenq_entry) <<
 193                 ENA_REGS_AENQ_CAPS_AENQ_ENTRY_SIZE_SHIFT) &
 194                 ENA_REGS_AENQ_CAPS_AENQ_ENTRY_SIZE_MASK;
 195         ENA_REG_WRITE32(ena_dev->bus, aenq_caps, ena_dev->reg_bar + ENA_REGS_AENQ_CAPS_OFF);
 196
 197         if (unlikely(!aenq_handlers)) {
 198                 ena_trc_err(ena_dev, "AENQ handlers pointer is NULL\n");
 199                 return ENA_COM_INVAL;
 200         }
 201
 202         aenq->aenq_handlers = aenq_handlers;
 203
 204         return 0;
 205 }
 206
 207 static void comp_ctxt_release(struct ena_com_admin_queue *queue,
 208                                      struct ena_comp_ctx *comp_ctx)
 209 {
 210         comp_ctx->occupied = false;
 211         ATOMIC32_DEC(&queue->outstanding_cmds);
 212 }
 213
 214 static struct ena_comp_ctx *get_comp_ctxt(struct ena_com_admin_queue *admin_queue,
 215                                           u16 command_id, bool capture)
 216 {
 217         if (unlikely(command_id >= admin_queue->q_depth)) {
 218                 ena_trc_err(admin_queue->ena_dev,
 219                             "Command id is larger than the queue size. cmd_id: %u queue size %d\n",
 220                             command_id, admin_queue->q_depth);
 221                 return NULL;
 222         }
 223
 224         if (unlikely(!admin_queue->comp_ctx)) {
 225                 ena_trc_err(admin_queue->ena_dev,
 226                             "Completion context is NULL\n");
 227                 return NULL;
 228         }
 229
 230         if (unlikely(admin_queue->comp_ctx[command_id].occupied && capture)) {
 231                 ena_trc_err(admin_queue->ena_dev,
 232                             "Completion context is occupied\n");
 233                 return NULL;
 234         }
 235
 236         if (capture) {
 237                 ATOMIC32_INC(&admin_queue->outstanding_cmds);
 238                 admin_queue->comp_ctx[command_id].occupied = true;
 239         }
 240
 241         return &admin_queue->comp_ctx[command_id];
 242 }
 243
 244 static struct ena_comp_ctx *__ena_com_submit_admin_cmd(struct ena_com_admin_queue *admin_queue,
 245                                                        struct ena_admin_aq_entry *cmd,
 246                                                        size_t cmd_size_in_bytes,
 247                                                        struct ena_admin_acq_entry *comp,
 248                                                        size_t comp_size_in_bytes)
 249 {
 250         struct ena_comp_ctx *comp_ctx;
 251         u16 tail_masked, cmd_id;
 252         u16 queue_size_mask;
 253         u16 cnt;
 254
 255         queue_size_mask = admin_queue->q_depth - 1;
 256
 257         tail_masked = admin_queue->sq.tail & queue_size_mask;
 258
 259         /* In case of queue FULL */
 260         cnt = (u16)ATOMIC32_READ(&admin_queue->outstanding_cmds);
 261         if (cnt >= admin_queue->q_depth) {
 262                 ena_trc_dbg(admin_queue->ena_dev, "Admin queue is full.\n");
 263                 admin_queue->stats.out_of_space++;
 264                 return ERR_PTR(ENA_COM_NO_SPACE);
 265         }
 266
 267         cmd_id = admin_queue->curr_cmd_id;
 268
 269         cmd->aq_common_descriptor.flags |= admin_queue->sq.phase &
 270                 ENA_ADMIN_AQ_COMMON_DESC_PHASE_MASK;
 271
 272         cmd->aq_common_descriptor.command_id |= cmd_id &
 273                 ENA_ADMIN_AQ_COMMON_DESC_COMMAND_ID_MASK;
 274
 275         comp_ctx = get_comp_ctxt(admin_queue, cmd_id, true);
 276         if (unlikely(!comp_ctx))
 277                 return ERR_PTR(ENA_COM_INVAL);
 278
 279         comp_ctx->status = ENA_CMD_SUBMITTED;
 280         comp_ctx->comp_size = (u32)comp_size_in_bytes;
 281         comp_ctx->user_cqe = comp;
 282         comp_ctx->cmd_opcode = cmd->aq_common_descriptor.opcode;
 283
 284         ENA_WAIT_EVENT_CLEAR(comp_ctx->wait_event);
 285
 286         memcpy(&admin_queue->sq.entries[tail_masked], cmd, cmd_size_in_bytes);
 287
 288         admin_queue->curr_cmd_id = (admin_queue->curr_cmd_id + 1) &
 289                 queue_size_mask;
 290
 291         admin_queue->sq.tail++;
 292         admin_queue->stats.submitted_cmd++;
 293
 294         if (unlikely((admin_queue->sq.tail & queue_size_mask) == 0))
 295                 admin_queue->sq.phase = !admin_queue->sq.phase;
 296
 297         ENA_DB_SYNC(&admin_queue->sq.mem_handle);
 298         ENA_REG_WRITE32(admin_queue->bus, admin_queue->sq.tail,
 299                         admin_queue->sq.db_addr);
 300
 301         return comp_ctx;
 302 }
 303
 304 static int ena_com_init_comp_ctxt(struct ena_com_admin_queue *admin_queue)
 305 {
 306         struct ena_com_dev *ena_dev = admin_queue->ena_dev;
 307         size_t size = admin_queue->q_depth * sizeof(struct ena_comp_ctx);
 308         struct ena_comp_ctx *comp_ctx;
 309         u16 i;
 310
 311         admin_queue->comp_ctx = ENA_MEM_ALLOC(admin_queue->q_dmadev, size);
 312         if (unlikely(!admin_queue->comp_ctx)) {
 313                 ena_trc_err(ena_dev, "Memory allocation failed\n");
 314                 return ENA_COM_NO_MEM;
 315         }
 316
 317         for (i = 0; i < admin_queue->q_depth; i++) {
 318                 comp_ctx = get_comp_ctxt(admin_queue, i, false);
 319                 if (comp_ctx)
 320                         ENA_WAIT_EVENT_INIT(comp_ctx->wait_event);
 321         }
 322
 323         return 0;
 324 }
 325
 326 static struct ena_comp_ctx *ena_com_submit_admin_cmd(struct ena_com_admin_queue *admin_queue,
 327                                                      struct ena_admin_aq_entry *cmd,
 328                                                      size_t cmd_size_in_bytes,
 329                                                      struct ena_admin_acq_entry *comp,
 330                                                      size_t comp_size_in_bytes)
 331 {
 332         unsigned long flags = 0;
 333         struct ena_comp_ctx *comp_ctx;
 334
 335         ENA_SPINLOCK_LOCK(admin_queue->q_lock, flags);
 336         if (unlikely(!admin_queue->running_state)) {
 337                 ENA_SPINLOCK_UNLOCK(admin_queue->q_lock, flags);
 338                 return ERR_PTR(ENA_COM_NO_DEVICE);
 339         }
 340         comp_ctx = __ena_com_submit_admin_cmd(admin_queue, cmd,
 341                                               cmd_size_in_bytes,
 342                                               comp,
 343                                               comp_size_in_bytes);
 344         if (IS_ERR(comp_ctx))
 345                 admin_queue->running_state = false;
 346         ENA_SPINLOCK_UNLOCK(admin_queue->q_lock, flags);
 347
 348         return comp_ctx;
 349 }
 350
 351 static int ena_com_init_io_sq(struct ena_com_dev *ena_dev,
 352                               struct ena_com_create_io_ctx *ctx,
 353                               struct ena_com_io_sq *io_sq)
 354 {
 355         size_t size;
 356         int dev_node = 0;
 357
 358         memset(&io_sq->desc_addr, 0x0, sizeof(io_sq->desc_addr));
 359
 360         io_sq->dma_addr_bits = (u8)ena_dev->dma_addr_bits;
 361         io_sq->desc_entry_size =
 362                 (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX) ?
 363                 sizeof(struct ena_eth_io_tx_desc) :
 364                 sizeof(struct ena_eth_io_rx_desc);
 365
 366         size = io_sq->desc_entry_size * io_sq->q_depth;
 367         io_sq->bus = ena_dev->bus;
 368
 369         if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST) {
 370                 ENA_MEM_ALLOC_COHERENT_NODE(ena_dev->dmadev,
 371                                             size,
 372                                             io_sq->desc_addr.virt_addr,
 373                                             io_sq->desc_addr.phys_addr,
 374                                             io_sq->desc_addr.mem_handle,
 375                                             ctx->numa_node,
 376                                             dev_node);
 377                 if (!io_sq->desc_addr.virt_addr) {
 378                         ENA_MEM_ALLOC_COHERENT(ena_dev->dmadev,
 379                                                size,
 380                                                io_sq->desc_addr.virt_addr,
 381                                                io_sq->desc_addr.phys_addr,
 382                                                io_sq->desc_addr.mem_handle);
 383                 }
 384
 385                 if (!io_sq->desc_addr.virt_addr) {
 386                         ena_trc_err(ena_dev, "Memory allocation failed\n");
 387                         return ENA_COM_NO_MEM;
 388                 }
 389         }
 390
 391         if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
 392                 /* Allocate bounce buffers */
 393                 io_sq->bounce_buf_ctrl.buffer_size =
 394                         ena_dev->llq_info.desc_list_entry_size;
 395                 io_sq->bounce_buf_ctrl.buffers_num =
 396                         ENA_COM_BOUNCE_BUFFER_CNTRL_CNT;
 397                 io_sq->bounce_buf_ctrl.next_to_use = 0;
 398
 399                 size = io_sq->bounce_buf_ctrl.buffer_size *
 400                         io_sq->bounce_buf_ctrl.buffers_num;
 401
 402                 ENA_MEM_ALLOC_NODE(ena_dev->dmadev,
 403                                    size,
 404                                    io_sq->bounce_buf_ctrl.base_buffer,
 405                                    ctx->numa_node,
 406                                    dev_node);
 407                 if (!io_sq->bounce_buf_ctrl.base_buffer)
 408                         io_sq->bounce_buf_ctrl.base_buffer = ENA_MEM_ALLOC(ena_dev->dmadev, size);
 409
 410                 if (!io_sq->bounce_buf_ctrl.base_buffer) {
 411                         ena_trc_err(ena_dev, "Bounce buffer memory allocation failed\n");
 412                         return ENA_COM_NO_MEM;
 413                 }
 414
 415                 memcpy(&io_sq->llq_info, &ena_dev->llq_info,
 416                        sizeof(io_sq->llq_info));
 417
 418                 /* Initiate the first bounce buffer */
 419                 io_sq->llq_buf_ctrl.curr_bounce_buf =
 420                         ena_com_get_next_bounce_buffer(&io_sq->bounce_buf_ctrl);
 421                 memset(io_sq->llq_buf_ctrl.curr_bounce_buf,
 422                        0x0, io_sq->llq_info.desc_list_entry_size);
 423                 io_sq->llq_buf_ctrl.descs_left_in_line =
 424                         io_sq->llq_info.descs_num_before_header;
 425                 io_sq->disable_meta_caching =
 426                         io_sq->llq_info.disable_meta_caching;
 427
 428                 if (io_sq->llq_info.max_entries_in_tx_burst > 0)
 429                         io_sq->entries_in_tx_burst_left =
 430                                 io_sq->llq_info.max_entries_in_tx_burst;
 431         }
 432
 433         io_sq->tail = 0;
 434         io_sq->next_to_comp = 0;
 435         io_sq->phase = 1;
 436
 437         return 0;
 438 }
 439
 440 static int ena_com_init_io_cq(struct ena_com_dev *ena_dev,
 441                               struct ena_com_create_io_ctx *ctx,
 442                               struct ena_com_io_cq *io_cq)
 443 {
 444         size_t size;
 445         int prev_node = 0;
 446
 447         memset(&io_cq->cdesc_addr, 0x0, sizeof(io_cq->cdesc_addr));
 448
 449         /* Use the basic completion descriptor for Rx */
 450         io_cq->cdesc_entry_size_in_bytes =
 451                 (io_cq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX) ?
 452                 sizeof(struct ena_eth_io_tx_cdesc) :
 453                 sizeof(struct ena_eth_io_rx_cdesc_base);
 454
 455         size = io_cq->cdesc_entry_size_in_bytes * io_cq->q_depth;
 456         io_cq->bus = ena_dev->bus;
 457
 458         ENA_MEM_ALLOC_COHERENT_NODE_ALIGNED(ena_dev->dmadev,
 459                                             size,
 460                                             io_cq->cdesc_addr.virt_addr,
 461                                             io_cq->cdesc_addr.phys_addr,
 462                                             io_cq->cdesc_addr.mem_handle,
 463                                             ctx->numa_node,
 464                                             prev_node,
 465                                             ENA_CDESC_RING_SIZE_ALIGNMENT);
 466         if (!io_cq->cdesc_addr.virt_addr) {
 467                 ENA_MEM_ALLOC_COHERENT_ALIGNED(ena_dev->dmadev,
 468                                                size,
 469                                                io_cq->cdesc_addr.virt_addr,
 470                                                io_cq->cdesc_addr.phys_addr,
 471                                                io_cq->cdesc_addr.mem_handle,
 472                                                ENA_CDESC_RING_SIZE_ALIGNMENT);
 473         }
 474
 475         if (!io_cq->cdesc_addr.virt_addr) {
 476                 ena_trc_err(ena_dev, "Memory allocation failed\n");
 477                 return ENA_COM_NO_MEM;
 478         }
 479
 480         io_cq->phase = 1;
 481         io_cq->head = 0;
 482
 483         return 0;
 484 }
 485
 486 static void ena_com_handle_single_admin_completion(struct ena_com_admin_queue *admin_queue,
 487                                                    struct ena_admin_acq_entry *cqe)
 488 {
 489         struct ena_comp_ctx *comp_ctx;
 490         u16 cmd_id;
 491
 492         cmd_id = cqe->acq_common_descriptor.command &
 493                 ENA_ADMIN_ACQ_COMMON_DESC_COMMAND_ID_MASK;
 494
 495         comp_ctx = get_comp_ctxt(admin_queue, cmd_id, false);
 496         if (unlikely(!comp_ctx)) {
 497                 ena_trc_err(admin_queue->ena_dev,
 498                             "comp_ctx is NULL. Changing the admin queue running state\n");
 499                 admin_queue->running_state = false;
 500                 return;
 501         }
 502
 503         comp_ctx->status = ENA_CMD_COMPLETED;
 504         comp_ctx->comp_status = cqe->acq_common_descriptor.status;
 505
 506         if (comp_ctx->user_cqe)
 507                 memcpy(comp_ctx->user_cqe, (void *)cqe, comp_ctx->comp_size);
 508
 509         if (!admin_queue->polling)
 510                 ENA_WAIT_EVENT_SIGNAL(comp_ctx->wait_event);
 511 }
 512
 513 static void ena_com_handle_admin_completion(struct ena_com_admin_queue *admin_queue)
 514 {
 515         struct ena_admin_acq_entry *cqe = NULL;
 516         u16 comp_num = 0;
 517         u16 head_masked;
 518         u8 phase;
 519
 520         head_masked = admin_queue->cq.head & (admin_queue->q_depth - 1);
 521         phase = admin_queue->cq.phase;
 522
 523         cqe = &admin_queue->cq.entries[head_masked];
 524
 525         /* Go over all the completions */
 526         while ((READ_ONCE8(cqe->acq_common_descriptor.flags) &
 527                         ENA_ADMIN_ACQ_COMMON_DESC_PHASE_MASK) == phase) {
 528                 /* Do not read the rest of the completion entry before the
 529                  * phase bit was validated
 530                  */
 531                 dma_rmb();
 532                 ena_com_handle_single_admin_completion(admin_queue, cqe);
 533
 534                 head_masked++;
 535                 comp_num++;
 536                 if (unlikely(head_masked == admin_queue->q_depth)) {
 537                         head_masked = 0;
 538                         phase = !phase;
 539                 }
 540
 541                 cqe = &admin_queue->cq.entries[head_masked];
 542         }
 543
 544         admin_queue->cq.head += comp_num;
 545         admin_queue->cq.phase = phase;
 546         admin_queue->sq.head += comp_num;
 547         admin_queue->stats.completed_cmd += comp_num;
 548 }
 549
 550 static int ena_com_comp_status_to_errno(struct ena_com_admin_queue *admin_queue,
 551                                         u8 comp_status)
 552 {
 553         if (unlikely(comp_status != 0))
 554                 ena_trc_err(admin_queue->ena_dev,
 555                             "Admin command failed[%u]\n", comp_status);
 556
 557         switch (comp_status) {
 558         case ENA_ADMIN_SUCCESS:
 559                 return ENA_COM_OK;
 560         case ENA_ADMIN_RESOURCE_ALLOCATION_FAILURE:
 561                 return ENA_COM_NO_MEM;
 562         case ENA_ADMIN_UNSUPPORTED_OPCODE:
 563                 return ENA_COM_UNSUPPORTED;
 564         case ENA_ADMIN_BAD_OPCODE:
 565         case ENA_ADMIN_MALFORMED_REQUEST:
 566         case ENA_ADMIN_ILLEGAL_PARAMETER:
 567         case ENA_ADMIN_UNKNOWN_ERROR:
 568                 return ENA_COM_INVAL;
 569         case ENA_ADMIN_RESOURCE_BUSY:
 570                 return ENA_COM_TRY_AGAIN;
 571         }
 572
 573         return ENA_COM_INVAL;
 574 }
 575
 576 static void ena_delay_exponential_backoff_us(u32 exp, u32 delay_us)
 577 {
 578         delay_us = ENA_MAX32(ENA_MIN_ADMIN_POLL_US, delay_us);
 579         delay_us = ENA_MIN32(delay_us * (1U << exp), ENA_MAX_ADMIN_POLL_US);
 580         ENA_USLEEP(delay_us);
 581 }
 582
 583 static int ena_com_wait_and_process_admin_cq_polling(struct ena_comp_ctx *comp_ctx,
 584                                                      struct ena_com_admin_queue *admin_queue)
 585 {
 586         unsigned long flags = 0;
 587         ena_time_t timeout;
 588         int ret;
 589         u32 exp = 0;
 590
 591         timeout = ENA_GET_SYSTEM_TIMEOUT(admin_queue->completion_timeout);
 592
 593         while (1) {
 594                 ENA_SPINLOCK_LOCK(admin_queue->q_lock, flags);
 595                 ena_com_handle_admin_completion(admin_queue);
 596                 ENA_SPINLOCK_UNLOCK(admin_queue->q_lock, flags);
 597
 598                 if (comp_ctx->status != ENA_CMD_SUBMITTED)
 599                         break;
 600
 601                 if (ENA_TIME_EXPIRE(timeout)) {
 602                         ena_trc_err(admin_queue->ena_dev,
 603                                     "Wait for completion (polling) timeout\n");
 604                         /* ENA didn't have any completion */
 605                         ENA_SPINLOCK_LOCK(admin_queue->q_lock, flags);
 606                         admin_queue->stats.no_completion++;
 607                         admin_queue->running_state = false;
 608                         ENA_SPINLOCK_UNLOCK(admin_queue->q_lock, flags);
 609
 610                         ret = ENA_COM_TIMER_EXPIRED;
 611                         goto err;
 612                 }
 613
 614                 ena_delay_exponential_backoff_us(exp++,
 615                                                  admin_queue->ena_dev->ena_min_poll_delay_us);
 616         }
 617
 618         if (unlikely(comp_ctx->status == ENA_CMD_ABORTED)) {
 619                 ena_trc_err(admin_queue->ena_dev, "Command was aborted\n");
 620                 ENA_SPINLOCK_LOCK(admin_queue->q_lock, flags);
 621                 admin_queue->stats.aborted_cmd++;
 622                 ENA_SPINLOCK_UNLOCK(admin_queue->q_lock, flags);
 623                 ret = ENA_COM_NO_DEVICE;
 624                 goto err;
 625         }
 626
 627         ENA_WARN(comp_ctx->status != ENA_CMD_COMPLETED,
 628                  admin_queue->ena_dev, "Invalid comp status %d\n",
 629                  comp_ctx->status);
 630
 631         ret = ena_com_comp_status_to_errno(admin_queue, comp_ctx->comp_status);
 632 err:
 633         comp_ctxt_release(admin_queue, comp_ctx);
 634         return ret;
 635 }
 636
 637 /*
 638  * Set the LLQ configurations of the firmware
 639  *
 640  * The driver provides only the enabled feature values to the device,
 641  * which in turn, checks if they are supported.
 642  */
 643 static int ena_com_set_llq(struct ena_com_dev *ena_dev)
 644 {
 645         struct ena_com_admin_queue *admin_queue;
 646         struct ena_admin_set_feat_cmd cmd;
 647         struct ena_admin_set_feat_resp resp;
 648         struct ena_com_llq_info *llq_info = &ena_dev->llq_info;
 649         int ret;
 650
 651         memset(&cmd, 0x0, sizeof(cmd));
 652         admin_queue = &ena_dev->admin_queue;
 653
 654         cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
 655         cmd.feat_common.feature_id = ENA_ADMIN_LLQ;
 656
 657         cmd.u.llq.header_location_ctrl_enabled = llq_info->header_location_ctrl;
 658         cmd.u.llq.entry_size_ctrl_enabled = llq_info->desc_list_entry_size_ctrl;
 659         cmd.u.llq.desc_num_before_header_enabled = llq_info->descs_num_before_header;
 660         cmd.u.llq.descriptors_stride_ctrl_enabled = llq_info->desc_stride_ctrl;
 661
 662         cmd.u.llq.accel_mode.u.set.enabled_flags =
 663                 BIT(ENA_ADMIN_DISABLE_META_CACHING) |
 664                 BIT(ENA_ADMIN_LIMIT_TX_BURST);
 665
 666         ret = ena_com_execute_admin_command(admin_queue,
 667                                             (struct ena_admin_aq_entry *)&cmd,
 668                                             sizeof(cmd),
 669                                             (struct ena_admin_acq_entry *)&resp,
 670                                             sizeof(resp));
 671
 672         if (unlikely(ret))
 673                 ena_trc_err(ena_dev, "Failed to set LLQ configurations: %d\n", ret);
 674
 675         return ret;
 676 }
 677
 678 static int ena_com_config_llq_info(struct ena_com_dev *ena_dev,
 679                                    struct ena_admin_feature_llq_desc *llq_features,
 680                                    struct ena_llq_configurations *llq_default_cfg)
 681 {
 682         struct ena_com_llq_info *llq_info = &ena_dev->llq_info;
 683         struct ena_admin_accel_mode_get llq_accel_mode_get;
 684         u16 supported_feat;
 685         int rc;
 686
 687         memset(llq_info, 0, sizeof(*llq_info));
 688
 689         supported_feat = llq_features->header_location_ctrl_supported;
 690
 691         if (likely(supported_feat & llq_default_cfg->llq_header_location)) {
 692                 llq_info->header_location_ctrl =
 693                         llq_default_cfg->llq_header_location;
 694         } else {
 695                 ena_trc_err(ena_dev, "Invalid header location control, supported: 0x%x\n",
 696                             supported_feat);
 697                 return -EINVAL;
 698         }
 699
 700         if (likely(llq_info->header_location_ctrl == ENA_ADMIN_INLINE_HEADER)) {
 701                 supported_feat = llq_features->descriptors_stride_ctrl_supported;
 702                 if (likely(supported_feat & llq_default_cfg->llq_stride_ctrl)) {
 703                         llq_info->desc_stride_ctrl = llq_default_cfg->llq_stride_ctrl;
 704                 } else  {
 705                         if (supported_feat & ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY) {
 706                                 llq_info->desc_stride_ctrl = ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY;
 707                         } else if (supported_feat & ENA_ADMIN_SINGLE_DESC_PER_ENTRY) {
 708                                 llq_info->desc_stride_ctrl = ENA_ADMIN_SINGLE_DESC_PER_ENTRY;
 709                         } else {
 710                                 ena_trc_err(ena_dev, "Invalid desc_stride_ctrl, supported: 0x%x\n",
 711                                             supported_feat);
 712                                 return -EINVAL;
 713                         }
 714
 715                         ena_trc_err(ena_dev, "Default llq stride ctrl is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n",
 716                                     llq_default_cfg->llq_stride_ctrl,
 717                                     supported_feat,
 718                                     llq_info->desc_stride_ctrl);
 719                 }
 720         } else {
 721                 llq_info->desc_stride_ctrl = 0;
 722         }
 723
 724         supported_feat = llq_features->entry_size_ctrl_supported;
 725         if (likely(supported_feat & llq_default_cfg->llq_ring_entry_size)) {
 726                 llq_info->desc_list_entry_size_ctrl = llq_default_cfg->llq_ring_entry_size;
 727                 llq_info->desc_list_entry_size = llq_default_cfg->llq_ring_entry_size_value;
 728         } else {
 729                 if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_128B) {
 730                         llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_128B;
 731                         llq_info->desc_list_entry_size = 128;
 732                 } else if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_192B) {
 733                         llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_192B;
 734                         llq_info->desc_list_entry_size = 192;
 735                 } else if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_256B) {
 736                         llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_256B;
 737                         llq_info->desc_list_entry_size = 256;
 738                 } else {
 739                         ena_trc_err(ena_dev, "Invalid entry_size_ctrl, supported: 0x%x\n",
 740                                     supported_feat);
 741                         return -EINVAL;
 742                 }
 743
 744                 ena_trc_err(ena_dev, "Default llq ring entry size is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n",
 745                             llq_default_cfg->llq_ring_entry_size,
 746                             supported_feat,
 747                             llq_info->desc_list_entry_size);
 748         }
 749         if (unlikely(llq_info->desc_list_entry_size & 0x7)) {
 750                 /* The desc list entry size should be whole multiply of 8
 751                  * This requirement comes from __iowrite64_copy()
 752                  */
 753                 ena_trc_err(ena_dev, "Illegal entry size %d\n",
 754                             llq_info->desc_list_entry_size);
 755                 return -EINVAL;
 756         }
 757
 758         if (llq_info->desc_stride_ctrl == ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY)
 759                 llq_info->descs_per_entry = llq_info->desc_list_entry_size /
 760                         sizeof(struct ena_eth_io_tx_desc);
 761         else
 762                 llq_info->descs_per_entry = 1;
 763
 764         supported_feat = llq_features->desc_num_before_header_supported;
 765         if (likely(supported_feat & llq_default_cfg->llq_num_decs_before_header)) {
 766                 llq_info->descs_num_before_header = llq_default_cfg->llq_num_decs_before_header;
 767         } else {
 768                 if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2) {
 769                         llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2;
 770                 } else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_1) {
 771                         llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_1;
 772                 } else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_4) {
 773                         llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_4;
 774                 } else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_8) {
 775                         llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_8;
 776                 } else {
 777                         ena_trc_err(ena_dev, "Invalid descs_num_before_header, supported: 0x%x\n",
 778                                     supported_feat);
 779                         return -EINVAL;
 780                 }
 781
 782                 ena_trc_err(ena_dev, "Default llq num descs before header is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n",
 783                             llq_default_cfg->llq_num_decs_before_header,
 784                             supported_feat,
 785                             llq_info->descs_num_before_header);
 786         }
 787         /* Check for accelerated queue supported */
 788         llq_accel_mode_get = llq_features->accel_mode.u.get;
 789
 790         llq_info->disable_meta_caching =
 791                 !!(llq_accel_mode_get.supported_flags &
 792                    BIT(ENA_ADMIN_DISABLE_META_CACHING));
 793
 794         if (llq_accel_mode_get.supported_flags & BIT(ENA_ADMIN_LIMIT_TX_BURST))
 795                 llq_info->max_entries_in_tx_burst =
 796                         llq_accel_mode_get.max_tx_burst_size /
 797                         llq_default_cfg->llq_ring_entry_size_value;
 798
 799         rc = ena_com_set_llq(ena_dev);
 800         if (rc)
 801                 ena_trc_err(ena_dev, "Cannot set LLQ configuration: %d\n", rc);
 802
 803         return rc;
 804 }
 805
 806 static int ena_com_wait_and_process_admin_cq_interrupts(struct ena_comp_ctx *comp_ctx,
 807                                                         struct ena_com_admin_queue *admin_queue)
 808 {
 809         unsigned long flags = 0;
 810         int ret;
 811
 812         ENA_WAIT_EVENT_WAIT(comp_ctx->wait_event,
 813                             admin_queue->completion_timeout);
 814
 815         /* In case the command wasn't completed find out the root cause.
 816          * There might be 2 kinds of errors
 817          * 1) No completion (timeout reached)
 818          * 2) There is completion but the device didn't get any msi-x interrupt.
 819          */
 820         if (unlikely(comp_ctx->status == ENA_CMD_SUBMITTED)) {
 821                 ENA_SPINLOCK_LOCK(admin_queue->q_lock, flags);
 822                 ena_com_handle_admin_completion(admin_queue);
 823                 admin_queue->stats.no_completion++;
 824                 ENA_SPINLOCK_UNLOCK(admin_queue->q_lock, flags);
 825
 826                 if (comp_ctx->status == ENA_CMD_COMPLETED) {
 827                         ena_trc_err(admin_queue->ena_dev,
 828                                     "The ena device sent a completion but the driver didn't receive a MSI-X interrupt (cmd %d), autopolling mode is %s\n",
 829                                     comp_ctx->cmd_opcode, admin_queue->auto_polling ? "ON" : "OFF");
 830                         /* Check if fallback to polling is enabled */
 831                         if (admin_queue->auto_polling)
 832                                 admin_queue->polling = true;
 833                 } else {
 834                         ena_trc_err(admin_queue->ena_dev,
 835                                     "The ena device didn't send a completion for the admin cmd %d status %d\n",
 836                                     comp_ctx->cmd_opcode, comp_ctx->status);
 837                 }
 838                 /* Check if shifted to polling mode.
 839                  * This will happen if there is a completion without an interrupt
 840                  * and autopolling mode is enabled. Continuing normal execution in such case
 841                  */
 842                 if (!admin_queue->polling) {
 843                         admin_queue->running_state = false;
 844                         ret = ENA_COM_TIMER_EXPIRED;
 845                         goto err;
 846                 }
 847         }
 848
 849         ret = ena_com_comp_status_to_errno(admin_queue, comp_ctx->comp_status);
 850 err:
 851         comp_ctxt_release(admin_queue, comp_ctx);
 852         return ret;
 853 }
 854
 855 /* This method read the hardware device register through posting writes
 856  * and waiting for response
 857  * On timeout the function will return ENA_MMIO_READ_TIMEOUT
 858  */
 859 static u32 ena_com_reg_bar_read32(struct ena_com_dev *ena_dev, u16 offset)
 860 {
 861         struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
 862         volatile struct ena_admin_ena_mmio_req_read_less_resp *read_resp =
 863                 mmio_read->read_resp;
 864         u32 mmio_read_reg, ret, i;
 865         unsigned long flags = 0;
 866         u32 timeout = mmio_read->reg_read_to;
 867
 868         ENA_MIGHT_SLEEP();
 869
 870         if (timeout == 0)
 871                 timeout = ENA_REG_READ_TIMEOUT;
 872
 873         /* If readless is disabled, perform regular read */
 874         if (!mmio_read->readless_supported)
 875                 return ENA_REG_READ32(ena_dev->bus, ena_dev->reg_bar + offset);
 876
 877         ENA_SPINLOCK_LOCK(mmio_read->lock, flags);
 878         mmio_read->seq_num++;
 879
 880         read_resp->req_id = mmio_read->seq_num + 0xDEAD;
 881         mmio_read_reg = (offset << ENA_REGS_MMIO_REG_READ_REG_OFF_SHIFT) &
 882                         ENA_REGS_MMIO_REG_READ_REG_OFF_MASK;
 883         mmio_read_reg |= mmio_read->seq_num &
 884                         ENA_REGS_MMIO_REG_READ_REQ_ID_MASK;
 885
 886         ENA_REG_WRITE32(ena_dev->bus, mmio_read_reg,
 887                         ena_dev->reg_bar + ENA_REGS_MMIO_REG_READ_OFF);
 888
 889         for (i = 0; i < timeout; i++) {
 890                 if (READ_ONCE16(read_resp->req_id) == mmio_read->seq_num)
 891                         break;
 892
 893                 ENA_UDELAY(1);
 894         }
 895
 896         if (unlikely(i == timeout)) {
 897                 ena_trc_err(ena_dev, "Reading reg failed for timeout. expected: req id[%hu] offset[%hu] actual: req id[%hu] offset[%hu]\n",
 898                             mmio_read->seq_num,
 899                             offset,
 900                             read_resp->req_id,
 901                             read_resp->reg_off);
 902                 ret = ENA_MMIO_READ_TIMEOUT;
 903                 goto err;
 904         }
 905
 906         if (read_resp->reg_off != offset) {
 907                 ena_trc_err(ena_dev, "Read failure: wrong offset provided\n");
 908                 ret = ENA_MMIO_READ_TIMEOUT;
 909         } else {
 910                 ret = read_resp->reg_val;
 911         }
 912 err:
 913         ENA_SPINLOCK_UNLOCK(mmio_read->lock, flags);
 914
 915         return ret;
 916 }
 917
 918 /* There are two types to wait for completion.
 919  * Polling mode - wait until the completion is available.
 920  * Async mode - wait on wait queue until the completion is ready
 921  * (or the timeout expired).
 922  * It is expected that the IRQ called ena_com_handle_admin_completion
 923  * to mark the completions.
 924  */
 925 static int ena_com_wait_and_process_admin_cq(struct ena_comp_ctx *comp_ctx,
 926                                              struct ena_com_admin_queue *admin_queue)
 927 {
 928         if (admin_queue->polling)
 929                 return ena_com_wait_and_process_admin_cq_polling(comp_ctx,
 930                                                                  admin_queue);
 931
 932         return ena_com_wait_and_process_admin_cq_interrupts(comp_ctx,
 933                                                             admin_queue);
 934 }
 935
 936 static int ena_com_destroy_io_sq(struct ena_com_dev *ena_dev,
 937                                  struct ena_com_io_sq *io_sq)
 938 {
 939         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
 940         struct ena_admin_aq_destroy_sq_cmd destroy_cmd;
 941         struct ena_admin_acq_destroy_sq_resp_desc destroy_resp;
 942         u8 direction;
 943         int ret;
 944
 945         memset(&destroy_cmd, 0x0, sizeof(destroy_cmd));
 946
 947         if (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
 948                 direction = ENA_ADMIN_SQ_DIRECTION_TX;
 949         else
 950                 direction = ENA_ADMIN_SQ_DIRECTION_RX;
 951
 952         destroy_cmd.sq.sq_identity |= (direction <<
 953                 ENA_ADMIN_SQ_SQ_DIRECTION_SHIFT) &
 954                 ENA_ADMIN_SQ_SQ_DIRECTION_MASK;
 955
 956         destroy_cmd.sq.sq_idx = io_sq->idx;
 957         destroy_cmd.aq_common_descriptor.opcode = ENA_ADMIN_DESTROY_SQ;
 958
 959         ret = ena_com_execute_admin_command(admin_queue,
 960                                             (struct ena_admin_aq_entry *)&destroy_cmd,
 961                                             sizeof(destroy_cmd),
 962                                             (struct ena_admin_acq_entry *)&destroy_resp,
 963                                             sizeof(destroy_resp));
 964
 965         if (unlikely(ret && (ret != ENA_COM_NO_DEVICE)))
 966                 ena_trc_err(ena_dev, "Failed to destroy io sq error: %d\n", ret);
 967
 968         return ret;
 969 }
 970
 971 static void ena_com_io_queue_free(struct ena_com_dev *ena_dev,
 972                                   struct ena_com_io_sq *io_sq,
 973                                   struct ena_com_io_cq *io_cq)
 974 {
 975         size_t size;
 976
 977         if (io_cq->cdesc_addr.virt_addr) {
 978                 size = io_cq->cdesc_entry_size_in_bytes * io_cq->q_depth;
 979
 980                 ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
 981                                       size,
 982                                       io_cq->cdesc_addr.virt_addr,
 983                                       io_cq->cdesc_addr.phys_addr,
 984                                       io_cq->cdesc_addr.mem_handle);
 985
 986                 io_cq->cdesc_addr.virt_addr = NULL;
 987         }
 988
 989         if (io_sq->desc_addr.virt_addr) {
 990                 size = io_sq->desc_entry_size * io_sq->q_depth;
 991
 992                 ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
 993                                       size,
 994                                       io_sq->desc_addr.virt_addr,
 995                                       io_sq->desc_addr.phys_addr,
 996                                       io_sq->desc_addr.mem_handle);
 997
 998                 io_sq->desc_addr.virt_addr = NULL;
 999         }
1000
1001         if (io_sq->bounce_buf_ctrl.base_buffer) {
1002                 ENA_MEM_FREE(ena_dev->dmadev,
1003                              io_sq->bounce_buf_ctrl.base_buffer,
1004                              (io_sq->llq_info.desc_list_entry_size * ENA_COM_BOUNCE_BUFFER_CNTRL_CNT));
1005                 io_sq->bounce_buf_ctrl.base_buffer = NULL;
1006         }
1007 }
1008
1009 static int wait_for_reset_state(struct ena_com_dev *ena_dev, u32 timeout,
1010                                 u16 exp_state)
1011 {
1012         u32 val, exp = 0;
1013         ena_time_t timeout_stamp;
1014
1015         /* Convert timeout from resolution of 100ms to us resolution. */
1016         timeout_stamp = ENA_GET_SYSTEM_TIMEOUT(100 * 1000 * timeout);
1017
1018         while (1) {
1019                 val = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
1020
1021                 if (unlikely(val == ENA_MMIO_READ_TIMEOUT)) {
1022                         ena_trc_err(ena_dev, "Reg read timeout occurred\n");
1023                         return ENA_COM_TIMER_EXPIRED;
1024                 }
1025
1026                 if ((val & ENA_REGS_DEV_STS_RESET_IN_PROGRESS_MASK) ==
1027                         exp_state)
1028                         return 0;
1029
1030                 if (ENA_TIME_EXPIRE(timeout_stamp))
1031                         return ENA_COM_TIMER_EXPIRED;
1032
1033                 ena_delay_exponential_backoff_us(exp++, ena_dev->ena_min_poll_delay_us);
1034         }
1035 }
1036
1037 static bool ena_com_check_supported_feature_id(struct ena_com_dev *ena_dev,
1038                                                enum ena_admin_aq_feature_id feature_id)
1039 {
1040         u32 feature_mask = 1 << feature_id;
1041
1042         /* Device attributes is always supported */
1043         if ((feature_id != ENA_ADMIN_DEVICE_ATTRIBUTES) &&
1044             !(ena_dev->supported_features & feature_mask))
1045                 return false;
1046
1047         return true;
1048 }
1049
1050 static int ena_com_get_feature_ex(struct ena_com_dev *ena_dev,
1051                                   struct ena_admin_get_feat_resp *get_resp,
1052                                   enum ena_admin_aq_feature_id feature_id,
1053                                   dma_addr_t control_buf_dma_addr,
1054                                   u32 control_buff_size,
1055                                   u8 feature_ver)
1056 {
1057         struct ena_com_admin_queue *admin_queue;
1058         struct ena_admin_get_feat_cmd get_cmd;
1059         int ret;
1060
1061         if (!ena_com_check_supported_feature_id(ena_dev, feature_id)) {
1062                 ena_trc_dbg(ena_dev, "Feature %d isn't supported\n", feature_id);
1063                 return ENA_COM_UNSUPPORTED;
1064         }
1065
1066         memset(&get_cmd, 0x0, sizeof(get_cmd));
1067         admin_queue = &ena_dev->admin_queue;
1068
1069         get_cmd.aq_common_descriptor.opcode = ENA_ADMIN_GET_FEATURE;
1070
1071         if (control_buff_size)
1072                 get_cmd.aq_common_descriptor.flags =
1073                         ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
1074         else
1075                 get_cmd.aq_common_descriptor.flags = 0;
1076
1077         ret = ena_com_mem_addr_set(ena_dev,
1078                                    &get_cmd.control_buffer.address,
1079                                    control_buf_dma_addr);
1080         if (unlikely(ret)) {
1081                 ena_trc_err(ena_dev, "Memory address set failed\n");
1082                 return ret;
1083         }
1084
1085         get_cmd.control_buffer.length = control_buff_size;
1086         get_cmd.feat_common.feature_version = feature_ver;
1087         get_cmd.feat_common.feature_id = feature_id;
1088
1089         ret = ena_com_execute_admin_command(admin_queue,
1090                                             (struct ena_admin_aq_entry *)
1091                                             &get_cmd,
1092                                             sizeof(get_cmd),
1093                                             (struct ena_admin_acq_entry *)
1094                                             get_resp,
1095                                             sizeof(*get_resp));
1096
1097         if (unlikely(ret))
1098                 ena_trc_err(ena_dev, "Failed to submit get_feature command %d error: %d\n",
1099                             feature_id, ret);
1100
1101         return ret;
1102 }
1103
1104 static int ena_com_get_feature(struct ena_com_dev *ena_dev,
1105                                struct ena_admin_get_feat_resp *get_resp,
1106                                enum ena_admin_aq_feature_id feature_id,
1107                                u8 feature_ver)
1108 {
1109         return ena_com_get_feature_ex(ena_dev,
1110                                       get_resp,
1111                                       feature_id,
1112                                       0,
1113                                       0,
1114                                       feature_ver);
1115 }
1116
1117 int ena_com_get_current_hash_function(struct ena_com_dev *ena_dev)
1118 {
1119         return ena_dev->rss.hash_func;
1120 }
1121
1122 static void ena_com_hash_key_fill_default_key(struct ena_com_dev *ena_dev)
1123 {
1124         struct ena_admin_feature_rss_flow_hash_control *hash_key =
1125                 (ena_dev->rss).hash_key;
1126
1127         ENA_RSS_FILL_KEY(&hash_key->key, sizeof(hash_key->key));
1128         /* The key buffer is stored in the device in an array of
1129          * uint32 elements.
1130          */
1131         hash_key->key_parts = ENA_ADMIN_RSS_KEY_PARTS;
1132 }
1133
1134 static int ena_com_hash_key_allocate(struct ena_com_dev *ena_dev)
1135 {
1136         struct ena_rss *rss = &ena_dev->rss;
1137
1138         if (!ena_com_check_supported_feature_id(ena_dev, ENA_ADMIN_RSS_HASH_FUNCTION))
1139                 return ENA_COM_UNSUPPORTED;
1140
1141         ENA_MEM_ALLOC_COHERENT(ena_dev->dmadev,
1142                                sizeof(*rss->hash_key),
1143                                rss->hash_key,
1144                                rss->hash_key_dma_addr,
1145                                rss->hash_key_mem_handle);
1146
1147         if (unlikely(!rss->hash_key))
1148                 return ENA_COM_NO_MEM;
1149
1150         return 0;
1151 }
1152
1153 static void ena_com_hash_key_destroy(struct ena_com_dev *ena_dev)
1154 {
1155         struct ena_rss *rss = &ena_dev->rss;
1156
1157         if (rss->hash_key)
1158                 ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
1159                                       sizeof(*rss->hash_key),
1160                                       rss->hash_key,
1161                                       rss->hash_key_dma_addr,
1162                                       rss->hash_key_mem_handle);
1163         rss->hash_key = NULL;
1164 }
1165
1166 static int ena_com_hash_ctrl_init(struct ena_com_dev *ena_dev)
1167 {
1168         struct ena_rss *rss = &ena_dev->rss;
1169
1170         ENA_MEM_ALLOC_COHERENT(ena_dev->dmadev,
1171                                sizeof(*rss->hash_ctrl),
1172                                rss->hash_ctrl,
1173                                rss->hash_ctrl_dma_addr,
1174                                rss->hash_ctrl_mem_handle);
1175
1176         if (unlikely(!rss->hash_ctrl))
1177                 return ENA_COM_NO_MEM;
1178
1179         return 0;
1180 }
1181
1182 static void ena_com_hash_ctrl_destroy(struct ena_com_dev *ena_dev)
1183 {
1184         struct ena_rss *rss = &ena_dev->rss;
1185
1186         if (rss->hash_ctrl)
1187                 ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
1188                                       sizeof(*rss->hash_ctrl),
1189                                       rss->hash_ctrl,
1190                                       rss->hash_ctrl_dma_addr,
1191                                       rss->hash_ctrl_mem_handle);
1192         rss->hash_ctrl = NULL;
1193 }
1194
1195 static int ena_com_indirect_table_allocate(struct ena_com_dev *ena_dev,
1196                                            u16 log_size)
1197 {
1198         struct ena_rss *rss = &ena_dev->rss;
1199         struct ena_admin_get_feat_resp get_resp;
1200         size_t tbl_size;
1201         int ret;
1202
1203         ret = ena_com_get_feature(ena_dev, &get_resp,
1204                                   ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG, 0);
1205         if (unlikely(ret))
1206                 return ret;
1207
1208         if ((get_resp.u.ind_table.min_size > log_size) ||
1209             (get_resp.u.ind_table.max_size < log_size)) {
1210                 ena_trc_err(ena_dev, "Indirect table size doesn't fit. requested size: %d while min is:%d and max %d\n",
1211                             1 << log_size,
1212                             1 << get_resp.u.ind_table.min_size,
1213                             1 << get_resp.u.ind_table.max_size);
1214                 return ENA_COM_INVAL;
1215         }
1216
1217         tbl_size = (1ULL << log_size) *
1218                 sizeof(struct ena_admin_rss_ind_table_entry);
1219
1220         ENA_MEM_ALLOC_COHERENT(ena_dev->dmadev,
1221                              tbl_size,
1222                              rss->rss_ind_tbl,
1223                              rss->rss_ind_tbl_dma_addr,
1224                              rss->rss_ind_tbl_mem_handle);
1225         if (unlikely(!rss->rss_ind_tbl))
1226                 goto mem_err1;
1227
1228         tbl_size = (1ULL << log_size) * sizeof(u16);
1229         rss->host_rss_ind_tbl =
1230                 ENA_MEM_ALLOC(ena_dev->dmadev, tbl_size);
1231         if (unlikely(!rss->host_rss_ind_tbl))
1232                 goto mem_err2;
1233
1234         rss->tbl_log_size = log_size;
1235
1236         return 0;
1237
1238 mem_err2:
1239         tbl_size = (1ULL << log_size) *
1240                 sizeof(struct ena_admin_rss_ind_table_entry);
1241
1242         ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
1243                               tbl_size,
1244                               rss->rss_ind_tbl,
1245                               rss->rss_ind_tbl_dma_addr,
1246                               rss->rss_ind_tbl_mem_handle);
1247         rss->rss_ind_tbl = NULL;
1248 mem_err1:
1249         rss->tbl_log_size = 0;
1250         return ENA_COM_NO_MEM;
1251 }
1252
1253 static void ena_com_indirect_table_destroy(struct ena_com_dev *ena_dev)
1254 {
1255         struct ena_rss *rss = &ena_dev->rss;
1256         size_t tbl_size = (1ULL << rss->tbl_log_size) *
1257                 sizeof(struct ena_admin_rss_ind_table_entry);
1258
1259         if (rss->rss_ind_tbl)
1260                 ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
1261                                       tbl_size,
1262                                       rss->rss_ind_tbl,
1263                                       rss->rss_ind_tbl_dma_addr,
1264                                       rss->rss_ind_tbl_mem_handle);
1265         rss->rss_ind_tbl = NULL;
1266
1267         if (rss->host_rss_ind_tbl)
1268                 ENA_MEM_FREE(ena_dev->dmadev,
1269                              rss->host_rss_ind_tbl,
1270                              ((1ULL << rss->tbl_log_size) * sizeof(u16)));
1271         rss->host_rss_ind_tbl = NULL;
1272 }
1273
1274 static int ena_com_create_io_sq(struct ena_com_dev *ena_dev,
1275                                 struct ena_com_io_sq *io_sq, u16 cq_idx)
1276 {
1277         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1278         struct ena_admin_aq_create_sq_cmd create_cmd;
1279         struct ena_admin_acq_create_sq_resp_desc cmd_completion;
1280         u8 direction;
1281         int ret;
1282
1283         memset(&create_cmd, 0x0, sizeof(create_cmd));
1284
1285         create_cmd.aq_common_descriptor.opcode = ENA_ADMIN_CREATE_SQ;
1286
1287         if (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
1288                 direction = ENA_ADMIN_SQ_DIRECTION_TX;
1289         else
1290                 direction = ENA_ADMIN_SQ_DIRECTION_RX;
1291
1292         create_cmd.sq_identity |= (direction <<
1293                 ENA_ADMIN_AQ_CREATE_SQ_CMD_SQ_DIRECTION_SHIFT) &
1294                 ENA_ADMIN_AQ_CREATE_SQ_CMD_SQ_DIRECTION_MASK;
1295
1296         create_cmd.sq_caps_2 |= io_sq->mem_queue_type &
1297                 ENA_ADMIN_AQ_CREATE_SQ_CMD_PLACEMENT_POLICY_MASK;
1298
1299         create_cmd.sq_caps_2 |= (ENA_ADMIN_COMPLETION_POLICY_DESC <<
1300                 ENA_ADMIN_AQ_CREATE_SQ_CMD_COMPLETION_POLICY_SHIFT) &
1301                 ENA_ADMIN_AQ_CREATE_SQ_CMD_COMPLETION_POLICY_MASK;
1302
1303         create_cmd.sq_caps_3 |=
1304                 ENA_ADMIN_AQ_CREATE_SQ_CMD_IS_PHYSICALLY_CONTIGUOUS_MASK;
1305
1306         create_cmd.cq_idx = cq_idx;
1307         create_cmd.sq_depth = io_sq->q_depth;
1308
1309         if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST) {
1310                 ret = ena_com_mem_addr_set(ena_dev,
1311                                            &create_cmd.sq_ba,
1312                                            io_sq->desc_addr.phys_addr);
1313                 if (unlikely(ret)) {
1314                         ena_trc_err(ena_dev, "Memory address set failed\n");
1315                         return ret;
1316                 }
1317         }
1318
1319         ret = ena_com_execute_admin_command(admin_queue,
1320                                             (struct ena_admin_aq_entry *)&create_cmd,
1321                                             sizeof(create_cmd),
1322                                             (struct ena_admin_acq_entry *)&cmd_completion,
1323                                             sizeof(cmd_completion));
1324         if (unlikely(ret)) {
1325                 ena_trc_err(ena_dev, "Failed to create IO SQ. error: %d\n", ret);
1326                 return ret;
1327         }
1328
1329         io_sq->idx = cmd_completion.sq_idx;
1330
1331         io_sq->db_addr = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1332                 (uintptr_t)cmd_completion.sq_doorbell_offset);
1333
1334         if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
1335                 io_sq->header_addr = (u8 __iomem *)((uintptr_t)ena_dev->mem_bar
1336                                 + cmd_completion.llq_headers_offset);
1337
1338                 io_sq->desc_addr.pbuf_dev_addr =
1339                         (u8 __iomem *)((uintptr_t)ena_dev->mem_bar +
1340                         cmd_completion.llq_descriptors_offset);
1341         }
1342
1343         ena_trc_dbg(ena_dev, "Created sq[%u], depth[%u]\n", io_sq->idx, io_sq->q_depth);
1344
1345         return ret;
1346 }
1347
1348 static int ena_com_ind_tbl_convert_to_device(struct ena_com_dev *ena_dev)
1349 {
1350         struct ena_rss *rss = &ena_dev->rss;
1351         struct ena_com_io_sq *io_sq;
1352         u16 qid;
1353         int i;
1354
1355         for (i = 0; i < 1 << rss->tbl_log_size; i++) {
1356                 qid = rss->host_rss_ind_tbl[i];
1357                 if (qid >= ENA_TOTAL_NUM_QUEUES)
1358                         return ENA_COM_INVAL;
1359
1360                 io_sq = &ena_dev->io_sq_queues[qid];
1361
1362                 if (io_sq->direction != ENA_COM_IO_QUEUE_DIRECTION_RX)
1363                         return ENA_COM_INVAL;
1364
1365                 rss->rss_ind_tbl[i].cq_idx = io_sq->idx;
1366         }
1367
1368         return 0;
1369 }
1370
1371 static void ena_com_update_intr_delay_resolution(struct ena_com_dev *ena_dev,
1372                                                  u16 intr_delay_resolution)
1373 {
1374         u16 prev_intr_delay_resolution = ena_dev->intr_delay_resolution;
1375
1376         if (unlikely(!intr_delay_resolution)) {
1377                 ena_trc_err(ena_dev, "Illegal intr_delay_resolution provided. Going to use default 1 usec resolution\n");
1378                 intr_delay_resolution = ENA_DEFAULT_INTR_DELAY_RESOLUTION;
1379         }
1380
1381         /* update Rx */
1382         ena_dev->intr_moder_rx_interval =
1383                 ena_dev->intr_moder_rx_interval *
1384                 prev_intr_delay_resolution /
1385                 intr_delay_resolution;
1386
1387         /* update Tx */
1388         ena_dev->intr_moder_tx_interval =
1389                 ena_dev->intr_moder_tx_interval *
1390                 prev_intr_delay_resolution /
1391                 intr_delay_resolution;
1392
1393         ena_dev->intr_delay_resolution = intr_delay_resolution;
1394 }
1395
1396 /*****************************************************************************/
1397 /*******************************      API       ******************************/
1398 /*****************************************************************************/
1399
1400 int ena_com_execute_admin_command(struct ena_com_admin_queue *admin_queue,
1401                                   struct ena_admin_aq_entry *cmd,
1402                                   size_t cmd_size,
1403                                   struct ena_admin_acq_entry *comp,
1404                                   size_t comp_size)
1405 {
1406         struct ena_comp_ctx *comp_ctx;
1407         int ret;
1408
1409         comp_ctx = ena_com_submit_admin_cmd(admin_queue, cmd, cmd_size,
1410                                             comp, comp_size);
1411         if (IS_ERR(comp_ctx)) {
1412                 if (comp_ctx == ERR_PTR(ENA_COM_NO_DEVICE))
1413                         ena_trc_dbg(admin_queue->ena_dev,
1414                                     "Failed to submit command [%ld]\n",
1415                                     PTR_ERR(comp_ctx));
1416                 else
1417                         ena_trc_err(admin_queue->ena_dev,
1418                                     "Failed to submit command [%ld]\n",
1419                                     PTR_ERR(comp_ctx));
1420
1421                 return (int)PTR_ERR(comp_ctx);
1422         }
1423
1424         ret = ena_com_wait_and_process_admin_cq(comp_ctx, admin_queue);
1425         if (unlikely(ret)) {
1426                 if (admin_queue->running_state)
1427                         ena_trc_err(admin_queue->ena_dev,
1428                                     "Failed to process command. ret = %d\n", ret);
1429                 else
1430                         ena_trc_dbg(admin_queue->ena_dev,
1431                                     "Failed to process command. ret = %d\n", ret);
1432         }
1433         return ret;
1434 }
1435
1436 int ena_com_create_io_cq(struct ena_com_dev *ena_dev,
1437                          struct ena_com_io_cq *io_cq)
1438 {
1439         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1440         struct ena_admin_aq_create_cq_cmd create_cmd;
1441         struct ena_admin_acq_create_cq_resp_desc cmd_completion;
1442         int ret;
1443
1444         memset(&create_cmd, 0x0, sizeof(create_cmd));
1445
1446         create_cmd.aq_common_descriptor.opcode = ENA_ADMIN_CREATE_CQ;
1447
1448         create_cmd.cq_caps_2 |= (io_cq->cdesc_entry_size_in_bytes / 4) &
1449                 ENA_ADMIN_AQ_CREATE_CQ_CMD_CQ_ENTRY_SIZE_WORDS_MASK;
1450         create_cmd.cq_caps_1 |=
1451                 ENA_ADMIN_AQ_CREATE_CQ_CMD_INTERRUPT_MODE_ENABLED_MASK;
1452
1453         create_cmd.msix_vector = io_cq->msix_vector;
1454         create_cmd.cq_depth = io_cq->q_depth;
1455
1456         ret = ena_com_mem_addr_set(ena_dev,
1457                                    &create_cmd.cq_ba,
1458                                    io_cq->cdesc_addr.phys_addr);
1459         if (unlikely(ret)) {
1460                 ena_trc_err(ena_dev, "Memory address set failed\n");
1461                 return ret;
1462         }
1463
1464         ret = ena_com_execute_admin_command(admin_queue,
1465                                             (struct ena_admin_aq_entry *)&create_cmd,
1466                                             sizeof(create_cmd),
1467                                             (struct ena_admin_acq_entry *)&cmd_completion,
1468                                             sizeof(cmd_completion));
1469         if (unlikely(ret)) {
1470                 ena_trc_err(ena_dev, "Failed to create IO CQ. error: %d\n", ret);
1471                 return ret;
1472         }
1473
1474         io_cq->idx = cmd_completion.cq_idx;
1475
1476         io_cq->unmask_reg = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1477                 cmd_completion.cq_interrupt_unmask_register_offset);
1478
1479         if (cmd_completion.cq_head_db_register_offset)
1480                 io_cq->cq_head_db_reg =
1481                         (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1482                         cmd_completion.cq_head_db_register_offset);
1483
1484         if (cmd_completion.numa_node_register_offset)
1485                 io_cq->numa_node_cfg_reg =
1486                         (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1487                         cmd_completion.numa_node_register_offset);
1488
1489         ena_trc_dbg(ena_dev, "Created cq[%u], depth[%u]\n", io_cq->idx, io_cq->q_depth);
1490
1491         return ret;
1492 }
1493
1494 int ena_com_get_io_handlers(struct ena_com_dev *ena_dev, u16 qid,
1495                             struct ena_com_io_sq **io_sq,
1496                             struct ena_com_io_cq **io_cq)
1497 {
1498         if (qid >= ENA_TOTAL_NUM_QUEUES) {
1499                 ena_trc_err(ena_dev, "Invalid queue number %d but the max is %d\n",
1500                             qid, ENA_TOTAL_NUM_QUEUES);
1501                 return ENA_COM_INVAL;
1502         }
1503
1504         *io_sq = &ena_dev->io_sq_queues[qid];
1505         *io_cq = &ena_dev->io_cq_queues[qid];
1506
1507         return 0;
1508 }
1509
1510 void ena_com_abort_admin_commands(struct ena_com_dev *ena_dev)
1511 {
1512         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1513         struct ena_comp_ctx *comp_ctx;
1514         u16 i;
1515
1516         if (!admin_queue->comp_ctx)
1517                 return;
1518
1519         for (i = 0; i < admin_queue->q_depth; i++) {
1520                 comp_ctx = get_comp_ctxt(admin_queue, i, false);
1521                 if (unlikely(!comp_ctx))
1522                         break;
1523
1524                 comp_ctx->status = ENA_CMD_ABORTED;
1525
1526                 ENA_WAIT_EVENT_SIGNAL(comp_ctx->wait_event);
1527         }
1528 }
1529
1530 void ena_com_wait_for_abort_completion(struct ena_com_dev *ena_dev)
1531 {
1532         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1533         unsigned long flags = 0;
1534         u32 exp = 0;
1535
1536         ENA_SPINLOCK_LOCK(admin_queue->q_lock, flags);
1537         while (ATOMIC32_READ(&admin_queue->outstanding_cmds) != 0) {
1538                 ENA_SPINLOCK_UNLOCK(admin_queue->q_lock, flags);
1539                 ena_delay_exponential_backoff_us(exp++, ena_dev->ena_min_poll_delay_us);
1540                 ENA_SPINLOCK_LOCK(admin_queue->q_lock, flags);
1541         }
1542         ENA_SPINLOCK_UNLOCK(admin_queue->q_lock, flags);
1543 }
1544
1545 int ena_com_destroy_io_cq(struct ena_com_dev *ena_dev,
1546                           struct ena_com_io_cq *io_cq)
1547 {
1548         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1549         struct ena_admin_aq_destroy_cq_cmd destroy_cmd;
1550         struct ena_admin_acq_destroy_cq_resp_desc destroy_resp;
1551         int ret;
1552
1553         memset(&destroy_cmd, 0x0, sizeof(destroy_cmd));
1554
1555         destroy_cmd.cq_idx = io_cq->idx;
1556         destroy_cmd.aq_common_descriptor.opcode = ENA_ADMIN_DESTROY_CQ;
1557
1558         ret = ena_com_execute_admin_command(admin_queue,
1559                                             (struct ena_admin_aq_entry *)&destroy_cmd,
1560                                             sizeof(destroy_cmd),
1561                                             (struct ena_admin_acq_entry *)&destroy_resp,
1562                                             sizeof(destroy_resp));
1563
1564         if (unlikely(ret && (ret != ENA_COM_NO_DEVICE)))
1565                 ena_trc_err(ena_dev, "Failed to destroy IO CQ. error: %d\n", ret);
1566
1567         return ret;
1568 }
1569
1570 bool ena_com_get_admin_running_state(struct ena_com_dev *ena_dev)
1571 {
1572         return ena_dev->admin_queue.running_state;
1573 }
1574
1575 void ena_com_set_admin_running_state(struct ena_com_dev *ena_dev, bool state)
1576 {
1577         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1578         unsigned long flags = 0;
1579
1580         ENA_SPINLOCK_LOCK(admin_queue->q_lock, flags);
1581         ena_dev->admin_queue.running_state = state;
1582         ENA_SPINLOCK_UNLOCK(admin_queue->q_lock, flags);
1583 }
1584
1585 void ena_com_admin_aenq_enable(struct ena_com_dev *ena_dev)
1586 {
1587         u16 depth = ena_dev->aenq.q_depth;
1588
1589         ENA_WARN(ena_dev->aenq.head != depth, ena_dev, "Invalid AENQ state\n");
1590
1591         /* Init head_db to mark that all entries in the queue
1592          * are initially available
1593          */
1594         ENA_REG_WRITE32(ena_dev->bus, depth, ena_dev->reg_bar + ENA_REGS_AENQ_HEAD_DB_OFF);
1595 }
1596
1597 int ena_com_set_aenq_config(struct ena_com_dev *ena_dev, u32 groups_flag)
1598 {
1599         struct ena_com_admin_queue *admin_queue;
1600         struct ena_admin_set_feat_cmd cmd;
1601         struct ena_admin_set_feat_resp resp;
1602         struct ena_admin_get_feat_resp get_resp;
1603         int ret;
1604
1605         ret = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_AENQ_CONFIG, 0);
1606         if (ret) {
1607                 ena_trc_info(ena_dev, "Can't get aenq configuration\n");
1608                 return ret;
1609         }
1610
1611         if ((get_resp.u.aenq.supported_groups & groups_flag) != groups_flag) {
1612                 ena_trc_warn(ena_dev, "Trying to set unsupported aenq events. supported flag: 0x%x asked flag: 0x%x\n",
1613                              get_resp.u.aenq.supported_groups,
1614                              groups_flag);
1615                 return ENA_COM_UNSUPPORTED;
1616         }
1617
1618         memset(&cmd, 0x0, sizeof(cmd));
1619         admin_queue = &ena_dev->admin_queue;
1620
1621         cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
1622         cmd.aq_common_descriptor.flags = 0;
1623         cmd.feat_common.feature_id = ENA_ADMIN_AENQ_CONFIG;
1624         cmd.u.aenq.enabled_groups = groups_flag;
1625
1626         ret = ena_com_execute_admin_command(admin_queue,
1627                                             (struct ena_admin_aq_entry *)&cmd,
1628                                             sizeof(cmd),
1629                                             (struct ena_admin_acq_entry *)&resp,
1630                                             sizeof(resp));
1631
1632         if (unlikely(ret))
1633                 ena_trc_err(ena_dev, "Failed to config AENQ ret: %d\n", ret);
1634
1635         return ret;
1636 }
1637
1638 int ena_com_get_dma_width(struct ena_com_dev *ena_dev)
1639 {
1640         u32 caps = ena_com_reg_bar_read32(ena_dev, ENA_REGS_CAPS_OFF);
1641         u32 width;
1642
1643         if (unlikely(caps == ENA_MMIO_READ_TIMEOUT)) {
1644                 ena_trc_err(ena_dev, "Reg read timeout occurred\n");
1645                 return ENA_COM_TIMER_EXPIRED;
1646         }
1647
1648         width = (caps & ENA_REGS_CAPS_DMA_ADDR_WIDTH_MASK) >>
1649                 ENA_REGS_CAPS_DMA_ADDR_WIDTH_SHIFT;
1650
1651         ena_trc_dbg(ena_dev, "ENA dma width: %d\n", width);
1652
1653         if ((width < 32) || width > ENA_MAX_PHYS_ADDR_SIZE_BITS) {
1654                 ena_trc_err(ena_dev, "DMA width illegal value: %d\n", width);
1655                 return ENA_COM_INVAL;
1656         }
1657
1658         ena_dev->dma_addr_bits = width;
1659
1660         return width;
1661 }
1662
1663 int ena_com_validate_version(struct ena_com_dev *ena_dev)
1664 {
1665         u32 ver;
1666         u32 ctrl_ver;
1667         u32 ctrl_ver_masked;
1668
1669         /* Make sure the ENA version and the controller version are at least
1670          * as the driver expects
1671          */
1672         ver = ena_com_reg_bar_read32(ena_dev, ENA_REGS_VERSION_OFF);
1673         ctrl_ver = ena_com_reg_bar_read32(ena_dev,
1674                                           ENA_REGS_CONTROLLER_VERSION_OFF);
1675
1676         if (unlikely((ver == ENA_MMIO_READ_TIMEOUT) ||
1677                      (ctrl_ver == ENA_MMIO_READ_TIMEOUT))) {
1678                 ena_trc_err(ena_dev, "Reg read timeout occurred\n");
1679                 return ENA_COM_TIMER_EXPIRED;
1680         }
1681
1682         ena_trc_info(ena_dev, "ENA device version: %d.%d\n",
1683                      (ver & ENA_REGS_VERSION_MAJOR_VERSION_MASK) >>
1684                      ENA_REGS_VERSION_MAJOR_VERSION_SHIFT,
1685                      ver & ENA_REGS_VERSION_MINOR_VERSION_MASK);
1686
1687         ena_trc_info(ena_dev, "ENA controller version: %d.%d.%d implementation version %d\n",
1688                      (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_MASK)
1689                      >> ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_SHIFT,
1690                      (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_MASK)
1691                      >> ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_SHIFT,
1692                      (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_SUBMINOR_VERSION_MASK),
1693                      (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_IMPL_ID_MASK) >>
1694                      ENA_REGS_CONTROLLER_VERSION_IMPL_ID_SHIFT);
1695
1696         ctrl_ver_masked =
1697                 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_MASK) |
1698                 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_MASK) |
1699                 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_SUBMINOR_VERSION_MASK);
1700
1701         /* Validate the ctrl version without the implementation ID */
1702         if (ctrl_ver_masked < MIN_ENA_CTRL_VER) {
1703                 ena_trc_err(ena_dev, "ENA ctrl version is lower than the minimal ctrl version the driver supports\n");
1704                 return -1;
1705         }
1706
1707         return 0;
1708 }
1709
1710 static void
1711 ena_com_free_ena_admin_queue_comp_ctx(struct ena_com_dev *ena_dev,
1712                                       struct ena_com_admin_queue *admin_queue)
1713
1714 {
1715         if (!admin_queue->comp_ctx)
1716                 return;
1717
1718         ENA_WAIT_EVENTS_DESTROY(admin_queue);
1719         ENA_MEM_FREE(ena_dev->dmadev,
1720                      admin_queue->comp_ctx,
1721                      (admin_queue->q_depth * sizeof(struct ena_comp_ctx)));
1722
1723         admin_queue->comp_ctx = NULL;
1724 }
1725
1726 void ena_com_admin_destroy(struct ena_com_dev *ena_dev)
1727 {
1728         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1729         struct ena_com_admin_cq *cq = &admin_queue->cq;
1730         struct ena_com_admin_sq *sq = &admin_queue->sq;
1731         struct ena_com_aenq *aenq = &ena_dev->aenq;
1732         u16 size;
1733
1734         ena_com_free_ena_admin_queue_comp_ctx(ena_dev, admin_queue);
1735
1736         size = ADMIN_SQ_SIZE(admin_queue->q_depth);
1737         if (sq->entries)
1738                 ENA_MEM_FREE_COHERENT(ena_dev->dmadev, size, sq->entries,
1739                                       sq->dma_addr, sq->mem_handle);
1740         sq->entries = NULL;
1741
1742         size = ADMIN_CQ_SIZE(admin_queue->q_depth);
1743         if (cq->entries)
1744                 ENA_MEM_FREE_COHERENT(ena_dev->dmadev, size, cq->entries,
1745                                       cq->dma_addr, cq->mem_handle);
1746         cq->entries = NULL;
1747
1748         size = ADMIN_AENQ_SIZE(aenq->q_depth);
1749         if (ena_dev->aenq.entries)
1750                 ENA_MEM_FREE_COHERENT(ena_dev->dmadev, size, aenq->entries,
1751                                       aenq->dma_addr, aenq->mem_handle);
1752         aenq->entries = NULL;
1753         ENA_SPINLOCK_DESTROY(admin_queue->q_lock);
1754 }
1755
1756 void ena_com_set_admin_polling_mode(struct ena_com_dev *ena_dev, bool polling)
1757 {
1758         u32 mask_value = 0;
1759
1760         if (polling)
1761                 mask_value = ENA_REGS_ADMIN_INTR_MASK;
1762
1763         ENA_REG_WRITE32(ena_dev->bus, mask_value,
1764                         ena_dev->reg_bar + ENA_REGS_INTR_MASK_OFF);
1765         ena_dev->admin_queue.polling = polling;
1766 }
1767
1768 bool ena_com_get_admin_polling_mode(struct ena_com_dev *ena_dev)
1769 {
1770         return ena_dev->admin_queue.polling;
1771 }
1772
1773 void ena_com_set_admin_auto_polling_mode(struct ena_com_dev *ena_dev,
1774                                          bool polling)
1775 {
1776         ena_dev->admin_queue.auto_polling = polling;
1777 }
1778
1779 int ena_com_mmio_reg_read_request_init(struct ena_com_dev *ena_dev)
1780 {
1781         struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1782
1783         ENA_SPINLOCK_INIT(mmio_read->lock);
1784         ENA_MEM_ALLOC_COHERENT(ena_dev->dmadev,
1785                                sizeof(*mmio_read->read_resp),
1786                                mmio_read->read_resp,
1787                                mmio_read->read_resp_dma_addr,
1788                                mmio_read->read_resp_mem_handle);
1789         if (unlikely(!mmio_read->read_resp))
1790                 goto err;
1791
1792         ena_com_mmio_reg_read_request_write_dev_addr(ena_dev);
1793
1794         mmio_read->read_resp->req_id = 0x0;
1795         mmio_read->seq_num = 0x0;
1796         mmio_read->readless_supported = true;
1797
1798         return 0;
1799
1800 err:
1801                 ENA_SPINLOCK_DESTROY(mmio_read->lock);
1802                 return ENA_COM_NO_MEM;
1803 }
1804
1805 void ena_com_set_mmio_read_mode(struct ena_com_dev *ena_dev, bool readless_supported)
1806 {
1807         struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1808
1809         mmio_read->readless_supported = readless_supported;
1810 }
1811
1812 void ena_com_mmio_reg_read_request_destroy(struct ena_com_dev *ena_dev)
1813 {
1814         struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1815
1816         ENA_REG_WRITE32(ena_dev->bus, 0x0, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_LO_OFF);
1817         ENA_REG_WRITE32(ena_dev->bus, 0x0, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_HI_OFF);
1818
1819         ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
1820                               sizeof(*mmio_read->read_resp),
1821                               mmio_read->read_resp,
1822                               mmio_read->read_resp_dma_addr,
1823                               mmio_read->read_resp_mem_handle);
1824
1825         mmio_read->read_resp = NULL;
1826         ENA_SPINLOCK_DESTROY(mmio_read->lock);
1827 }
1828
1829 void ena_com_mmio_reg_read_request_write_dev_addr(struct ena_com_dev *ena_dev)
1830 {
1831         struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
1832         u32 addr_low, addr_high;
1833
1834         addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(mmio_read->read_resp_dma_addr);
1835         addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(mmio_read->read_resp_dma_addr);
1836
1837         ENA_REG_WRITE32(ena_dev->bus, addr_low, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_LO_OFF);
1838         ENA_REG_WRITE32(ena_dev->bus, addr_high, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_HI_OFF);
1839 }
1840
1841 int ena_com_admin_init(struct ena_com_dev *ena_dev,
1842                        struct ena_aenq_handlers *aenq_handlers)
1843 {
1844         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
1845         u32 aq_caps, acq_caps, dev_sts, addr_low, addr_high;
1846         int ret;
1847
1848         dev_sts = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
1849
1850         if (unlikely(dev_sts == ENA_MMIO_READ_TIMEOUT)) {
1851                 ena_trc_err(ena_dev, "Reg read timeout occurred\n");
1852                 return ENA_COM_TIMER_EXPIRED;
1853         }
1854
1855         if (!(dev_sts & ENA_REGS_DEV_STS_READY_MASK)) {
1856                 ena_trc_err(ena_dev, "Device isn't ready, abort com init\n");
1857                 return ENA_COM_NO_DEVICE;
1858         }
1859
1860         admin_queue->q_depth = ENA_ADMIN_QUEUE_DEPTH;
1861
1862         admin_queue->bus = ena_dev->bus;
1863         admin_queue->q_dmadev = ena_dev->dmadev;
1864         admin_queue->polling = false;
1865         admin_queue->curr_cmd_id = 0;
1866
1867         ATOMIC32_SET(&admin_queue->outstanding_cmds, 0);
1868
1869         ENA_SPINLOCK_INIT(admin_queue->q_lock);
1870
1871         ret = ena_com_init_comp_ctxt(admin_queue);
1872         if (ret)
1873                 goto error;
1874
1875         ret = ena_com_admin_init_sq(admin_queue);
1876         if (ret)
1877                 goto error;
1878
1879         ret = ena_com_admin_init_cq(admin_queue);
1880         if (ret)
1881                 goto error;
1882
1883         admin_queue->sq.db_addr = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
1884                 ENA_REGS_AQ_DB_OFF);
1885
1886         addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(admin_queue->sq.dma_addr);
1887         addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(admin_queue->sq.dma_addr);
1888
1889         ENA_REG_WRITE32(ena_dev->bus, addr_low, ena_dev->reg_bar + ENA_REGS_AQ_BASE_LO_OFF);
1890         ENA_REG_WRITE32(ena_dev->bus, addr_high, ena_dev->reg_bar + ENA_REGS_AQ_BASE_HI_OFF);
1891
1892         addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(admin_queue->cq.dma_addr);
1893         addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(admin_queue->cq.dma_addr);
1894
1895         ENA_REG_WRITE32(ena_dev->bus, addr_low, ena_dev->reg_bar + ENA_REGS_ACQ_BASE_LO_OFF);
1896         ENA_REG_WRITE32(ena_dev->bus, addr_high, ena_dev->reg_bar + ENA_REGS_ACQ_BASE_HI_OFF);
1897
1898         aq_caps = 0;
1899         aq_caps |= admin_queue->q_depth & ENA_REGS_AQ_CAPS_AQ_DEPTH_MASK;
1900         aq_caps |= (sizeof(struct ena_admin_aq_entry) <<
1901                         ENA_REGS_AQ_CAPS_AQ_ENTRY_SIZE_SHIFT) &
1902                         ENA_REGS_AQ_CAPS_AQ_ENTRY_SIZE_MASK;
1903
1904         acq_caps = 0;
1905         acq_caps |= admin_queue->q_depth & ENA_REGS_ACQ_CAPS_ACQ_DEPTH_MASK;
1906         acq_caps |= (sizeof(struct ena_admin_acq_entry) <<
1907                 ENA_REGS_ACQ_CAPS_ACQ_ENTRY_SIZE_SHIFT) &
1908                 ENA_REGS_ACQ_CAPS_ACQ_ENTRY_SIZE_MASK;
1909
1910         ENA_REG_WRITE32(ena_dev->bus, aq_caps, ena_dev->reg_bar + ENA_REGS_AQ_CAPS_OFF);
1911         ENA_REG_WRITE32(ena_dev->bus, acq_caps, ena_dev->reg_bar + ENA_REGS_ACQ_CAPS_OFF);
1912         ret = ena_com_admin_init_aenq(ena_dev, aenq_handlers);
1913         if (ret)
1914                 goto error;
1915
1916         admin_queue->ena_dev = ena_dev;
1917         admin_queue->running_state = true;
1918
1919         return 0;
1920 error:
1921         ena_com_admin_destroy(ena_dev);
1922
1923         return ret;
1924 }
1925
1926 int ena_com_create_io_queue(struct ena_com_dev *ena_dev,
1927                             struct ena_com_create_io_ctx *ctx)
1928 {
1929         struct ena_com_io_sq *io_sq;
1930         struct ena_com_io_cq *io_cq;
1931         int ret;
1932
1933         if (ctx->qid >= ENA_TOTAL_NUM_QUEUES) {
1934                 ena_trc_err(ena_dev, "Qid (%d) is bigger than max num of queues (%d)\n",
1935                             ctx->qid, ENA_TOTAL_NUM_QUEUES);
1936                 return ENA_COM_INVAL;
1937         }
1938
1939         io_sq = &ena_dev->io_sq_queues[ctx->qid];
1940         io_cq = &ena_dev->io_cq_queues[ctx->qid];
1941
1942         memset(io_sq, 0x0, sizeof(*io_sq));
1943         memset(io_cq, 0x0, sizeof(*io_cq));
1944
1945         /* Init CQ */
1946         io_cq->q_depth = ctx->queue_size;
1947         io_cq->direction = ctx->direction;
1948         io_cq->qid = ctx->qid;
1949
1950         io_cq->msix_vector = ctx->msix_vector;
1951
1952         io_sq->q_depth = ctx->queue_size;
1953         io_sq->direction = ctx->direction;
1954         io_sq->qid = ctx->qid;
1955
1956         io_sq->mem_queue_type = ctx->mem_queue_type;
1957
1958         if (ctx->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
1959                 /* header length is limited to 8 bits */
1960                 io_sq->tx_max_header_size =
1961                         ENA_MIN32(ena_dev->tx_max_header_size, SZ_256);
1962
1963         ret = ena_com_init_io_sq(ena_dev, ctx, io_sq);
1964         if (ret)
1965                 goto error;
1966         ret = ena_com_init_io_cq(ena_dev, ctx, io_cq);
1967         if (ret)
1968                 goto error;
1969
1970         ret = ena_com_create_io_cq(ena_dev, io_cq);
1971         if (ret)
1972                 goto error;
1973
1974         ret = ena_com_create_io_sq(ena_dev, io_sq, io_cq->idx);
1975         if (ret)
1976                 goto destroy_io_cq;
1977
1978         return 0;
1979
1980 destroy_io_cq:
1981         ena_com_destroy_io_cq(ena_dev, io_cq);
1982 error:
1983         ena_com_io_queue_free(ena_dev, io_sq, io_cq);
1984         return ret;
1985 }
1986
1987 void ena_com_destroy_io_queue(struct ena_com_dev *ena_dev, u16 qid)
1988 {
1989         struct ena_com_io_sq *io_sq;
1990         struct ena_com_io_cq *io_cq;
1991
1992         if (qid >= ENA_TOTAL_NUM_QUEUES) {
1993                 ena_trc_err(ena_dev, "Qid (%d) is bigger than max num of queues (%d)\n",
1994                             qid, ENA_TOTAL_NUM_QUEUES);
1995                 return;
1996         }
1997
1998         io_sq = &ena_dev->io_sq_queues[qid];
1999         io_cq = &ena_dev->io_cq_queues[qid];
2000
2001         ena_com_destroy_io_sq(ena_dev, io_sq);
2002         ena_com_destroy_io_cq(ena_dev, io_cq);
2003
2004         ena_com_io_queue_free(ena_dev, io_sq, io_cq);
2005 }
2006
2007 int ena_com_get_link_params(struct ena_com_dev *ena_dev,
2008                             struct ena_admin_get_feat_resp *resp)
2009 {
2010         return ena_com_get_feature(ena_dev, resp, ENA_ADMIN_LINK_CONFIG, 0);
2011 }
2012
2013 int ena_com_get_dev_attr_feat(struct ena_com_dev *ena_dev,
2014                               struct ena_com_dev_get_features_ctx *get_feat_ctx)
2015 {
2016         struct ena_admin_get_feat_resp get_resp;
2017         int rc;
2018
2019         rc = ena_com_get_feature(ena_dev, &get_resp,
2020                                  ENA_ADMIN_DEVICE_ATTRIBUTES, 0);
2021         if (rc)
2022                 return rc;
2023
2024         memcpy(&get_feat_ctx->dev_attr, &get_resp.u.dev_attr,
2025                sizeof(get_resp.u.dev_attr));
2026
2027         ena_dev->supported_features = get_resp.u.dev_attr.supported_features;
2028
2029         if (ena_dev->supported_features & BIT(ENA_ADMIN_MAX_QUEUES_EXT)) {
2030                 rc = ena_com_get_feature(ena_dev, &get_resp,
2031                                          ENA_ADMIN_MAX_QUEUES_EXT,
2032                                          ENA_FEATURE_MAX_QUEUE_EXT_VER);
2033                 if (rc)
2034                         return rc;
2035
2036                 if (get_resp.u.max_queue_ext.version != ENA_FEATURE_MAX_QUEUE_EXT_VER)
2037                         return -EINVAL;
2038
2039                 memcpy(&get_feat_ctx->max_queue_ext, &get_resp.u.max_queue_ext,
2040                        sizeof(get_resp.u.max_queue_ext));
2041                 ena_dev->tx_max_header_size =
2042                         get_resp.u.max_queue_ext.max_queue_ext.max_tx_header_size;
2043         } else {
2044                 rc = ena_com_get_feature(ena_dev, &get_resp,
2045                                          ENA_ADMIN_MAX_QUEUES_NUM, 0);
2046                 memcpy(&get_feat_ctx->max_queues, &get_resp.u.max_queue,
2047                        sizeof(get_resp.u.max_queue));
2048                 ena_dev->tx_max_header_size =
2049                         get_resp.u.max_queue.max_header_size;
2050
2051                 if (rc)
2052                         return rc;
2053         }
2054
2055         rc = ena_com_get_feature(ena_dev, &get_resp,
2056                                  ENA_ADMIN_AENQ_CONFIG, 0);
2057         if (rc)
2058                 return rc;
2059
2060         memcpy(&get_feat_ctx->aenq, &get_resp.u.aenq,
2061                sizeof(get_resp.u.aenq));
2062
2063         rc = ena_com_get_feature(ena_dev, &get_resp,
2064                                  ENA_ADMIN_STATELESS_OFFLOAD_CONFIG, 0);
2065         if (rc)
2066                 return rc;
2067
2068         memcpy(&get_feat_ctx->offload, &get_resp.u.offload,
2069                sizeof(get_resp.u.offload));
2070
2071         /* Driver hints isn't mandatory admin command. So in case the
2072          * command isn't supported set driver hints to 0
2073          */
2074         rc = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_HW_HINTS, 0);
2075
2076         if (!rc)
2077                 memcpy(&get_feat_ctx->hw_hints, &get_resp.u.hw_hints,
2078                        sizeof(get_resp.u.hw_hints));
2079         else if (rc == ENA_COM_UNSUPPORTED)
2080                 memset(&get_feat_ctx->hw_hints, 0x0, sizeof(get_feat_ctx->hw_hints));
2081         else
2082                 return rc;
2083
2084         rc = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_LLQ, 0);
2085         if (!rc)
2086                 memcpy(&get_feat_ctx->llq, &get_resp.u.llq,
2087                        sizeof(get_resp.u.llq));
2088         else if (rc == ENA_COM_UNSUPPORTED)
2089                 memset(&get_feat_ctx->llq, 0x0, sizeof(get_feat_ctx->llq));
2090         else
2091                 return rc;
2092
2093         return 0;
2094 }
2095
2096 void ena_com_admin_q_comp_intr_handler(struct ena_com_dev *ena_dev)
2097 {
2098         ena_com_handle_admin_completion(&ena_dev->admin_queue);
2099 }
2100
2101 /* ena_handle_specific_aenq_event:
2102  * return the handler that is relevant to the specific event group
2103  */
2104 static ena_aenq_handler ena_com_get_specific_aenq_cb(struct ena_com_dev *ena_dev,
2105                                                      u16 group)
2106 {
2107         struct ena_aenq_handlers *aenq_handlers = ena_dev->aenq.aenq_handlers;
2108
2109         if ((group < ENA_MAX_HANDLERS) && aenq_handlers->handlers[group])
2110                 return aenq_handlers->handlers[group];
2111
2112         return aenq_handlers->unimplemented_handler;
2113 }
2114
2115 /* ena_aenq_intr_handler:
2116  * handles the aenq incoming events.
2117  * pop events from the queue and apply the specific handler
2118  */
2119 void ena_com_aenq_intr_handler(struct ena_com_dev *ena_dev, void *data)
2120 {
2121         struct ena_admin_aenq_entry *aenq_e;
2122         struct ena_admin_aenq_common_desc *aenq_common;
2123         struct ena_com_aenq *aenq  = &ena_dev->aenq;
2124         u64 timestamp;
2125         ena_aenq_handler handler_cb;
2126         u16 masked_head, processed = 0;
2127         u8 phase;
2128
2129         masked_head = aenq->head & (aenq->q_depth - 1);
2130         phase = aenq->phase;
2131         aenq_e = &aenq->entries[masked_head]; /* Get first entry */
2132         aenq_common = &aenq_e->aenq_common_desc;
2133
2134         /* Go over all the events */
2135         while ((READ_ONCE8(aenq_common->flags) &
2136                 ENA_ADMIN_AENQ_COMMON_DESC_PHASE_MASK) == phase) {
2137                 /* Make sure the phase bit (ownership) is as expected before
2138                  * reading the rest of the descriptor.
2139                  */
2140                 dma_rmb();
2141
2142                 timestamp = (u64)aenq_common->timestamp_low |
2143                         ((u64)aenq_common->timestamp_high << 32);
2144
2145                 ena_trc_dbg(ena_dev, "AENQ! Group[%x] Syndrome[%x] timestamp: [%" ENA_PRIu64 "s]\n",
2146                             aenq_common->group,
2147                             aenq_common->syndrome,
2148                             timestamp);
2149
2150                 /* Handle specific event*/
2151                 handler_cb = ena_com_get_specific_aenq_cb(ena_dev,
2152                                                           aenq_common->group);
2153                 handler_cb(data, aenq_e); /* call the actual event handler*/
2154
2155                 /* Get next event entry */
2156                 masked_head++;
2157                 processed++;
2158
2159                 if (unlikely(masked_head == aenq->q_depth)) {
2160                         masked_head = 0;
2161                         phase = !phase;
2162                 }
2163                 aenq_e = &aenq->entries[masked_head];
2164                 aenq_common = &aenq_e->aenq_common_desc;
2165         }
2166
2167         aenq->head += processed;
2168         aenq->phase = phase;
2169
2170         /* Don't update aenq doorbell if there weren't any processed events */
2171         if (!processed)
2172                 return;
2173
2174         /* write the aenq doorbell after all AENQ descriptors were read */
2175         mb();
2176         ENA_REG_WRITE32_RELAXED(ena_dev->bus, (u32)aenq->head,
2177                                 ena_dev->reg_bar + ENA_REGS_AENQ_HEAD_DB_OFF);
2178         mmiowb();
2179 }
2180 #ifdef ENA_EXTENDED_STATS
2181 /*
2182  * Sets the function Idx and Queue Idx to be used for
2183  * get full statistics feature
2184  *
2185  */
2186 int ena_com_extended_stats_set_func_queue(struct ena_com_dev *ena_dev,
2187                                           u32 func_queue)
2188 {
2189
2190         /* Function & Queue is acquired from user in the following format :
2191          * Bottom Half word:    funct
2192          * Top Half Word:       queue
2193          */
2194         ena_dev->stats_func = ENA_EXTENDED_STAT_GET_FUNCT(func_queue);
2195         ena_dev->stats_queue = ENA_EXTENDED_STAT_GET_QUEUE(func_queue);
2196
2197         return 0;
2198 }
2199
2200 #endif /* ENA_EXTENDED_STATS */
2201
2202 int ena_com_dev_reset(struct ena_com_dev *ena_dev,
2203                       enum ena_regs_reset_reason_types reset_reason)
2204 {
2205         u32 stat, timeout, cap, reset_val;
2206         int rc;
2207
2208         stat = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
2209         cap = ena_com_reg_bar_read32(ena_dev, ENA_REGS_CAPS_OFF);
2210
2211         if (unlikely((stat == ENA_MMIO_READ_TIMEOUT) ||
2212                      (cap == ENA_MMIO_READ_TIMEOUT))) {
2213                 ena_trc_err(ena_dev, "Reg read32 timeout occurred\n");
2214                 return ENA_COM_TIMER_EXPIRED;
2215         }
2216
2217         if ((stat & ENA_REGS_DEV_STS_READY_MASK) == 0) {
2218                 ena_trc_err(ena_dev, "Device isn't ready, can't reset device\n");
2219                 return ENA_COM_INVAL;
2220         }
2221
2222         timeout = (cap & ENA_REGS_CAPS_RESET_TIMEOUT_MASK) >>
2223                         ENA_REGS_CAPS_RESET_TIMEOUT_SHIFT;
2224         if (timeout == 0) {
2225                 ena_trc_err(ena_dev, "Invalid timeout value\n");
2226                 return ENA_COM_INVAL;
2227         }
2228
2229         /* start reset */
2230         reset_val = ENA_REGS_DEV_CTL_DEV_RESET_MASK;
2231         reset_val |= (reset_reason << ENA_REGS_DEV_CTL_RESET_REASON_SHIFT) &
2232                         ENA_REGS_DEV_CTL_RESET_REASON_MASK;
2233         ENA_REG_WRITE32(ena_dev->bus, reset_val, ena_dev->reg_bar + ENA_REGS_DEV_CTL_OFF);
2234
2235         /* Write again the MMIO read request address */
2236         ena_com_mmio_reg_read_request_write_dev_addr(ena_dev);
2237
2238         rc = wait_for_reset_state(ena_dev, timeout,
2239                                   ENA_REGS_DEV_STS_RESET_IN_PROGRESS_MASK);
2240         if (rc != 0) {
2241                 ena_trc_err(ena_dev, "Reset indication didn't turn on\n");
2242                 return rc;
2243         }
2244
2245         /* reset done */
2246         ENA_REG_WRITE32(ena_dev->bus, 0, ena_dev->reg_bar + ENA_REGS_DEV_CTL_OFF);
2247         rc = wait_for_reset_state(ena_dev, timeout, 0);
2248         if (rc != 0) {
2249                 ena_trc_err(ena_dev, "Reset indication didn't turn off\n");
2250                 return rc;
2251         }
2252
2253         timeout = (cap & ENA_REGS_CAPS_ADMIN_CMD_TO_MASK) >>
2254                 ENA_REGS_CAPS_ADMIN_CMD_TO_SHIFT;
2255         if (timeout)
2256                 /* the resolution of timeout reg is 100ms */
2257                 ena_dev->admin_queue.completion_timeout = timeout * 100000;
2258         else
2259                 ena_dev->admin_queue.completion_timeout = ADMIN_CMD_TIMEOUT_US;
2260
2261         return 0;
2262 }
2263
2264 static int ena_get_dev_stats(struct ena_com_dev *ena_dev,
2265                              struct ena_com_stats_ctx *ctx,
2266                              enum ena_admin_get_stats_type type)
2267 {
2268         struct ena_admin_aq_get_stats_cmd *get_cmd = &ctx->get_cmd;
2269         struct ena_admin_acq_get_stats_resp *get_resp = &ctx->get_resp;
2270         struct ena_com_admin_queue *admin_queue;
2271         int ret;
2272
2273         admin_queue = &ena_dev->admin_queue;
2274
2275         get_cmd->aq_common_descriptor.opcode = ENA_ADMIN_GET_STATS;
2276         get_cmd->aq_common_descriptor.flags = 0;
2277         get_cmd->type = type;
2278
2279         ret =  ena_com_execute_admin_command(admin_queue,
2280                                              (struct ena_admin_aq_entry *)get_cmd,
2281                                              sizeof(*get_cmd),
2282                                              (struct ena_admin_acq_entry *)get_resp,
2283                                              sizeof(*get_resp));
2284
2285         if (unlikely(ret))
2286                 ena_trc_err(ena_dev, "Failed to get stats. error: %d\n", ret);
2287
2288         return ret;
2289 }
2290
2291 int ena_com_get_eni_stats(struct ena_com_dev *ena_dev,
2292                           struct ena_admin_eni_stats *stats)
2293 {
2294         struct ena_com_stats_ctx ctx;
2295         int ret;
2296
2297         memset(&ctx, 0x0, sizeof(ctx));
2298         ret = ena_get_dev_stats(ena_dev, &ctx, ENA_ADMIN_GET_STATS_TYPE_ENI);
2299         if (likely(ret == 0))
2300                 memcpy(stats, &ctx.get_resp.u.eni_stats,
2301                        sizeof(ctx.get_resp.u.eni_stats));
2302
2303         return ret;
2304 }
2305
2306 int ena_com_get_dev_basic_stats(struct ena_com_dev *ena_dev,
2307                                 struct ena_admin_basic_stats *stats)
2308 {
2309         struct ena_com_stats_ctx ctx;
2310         int ret;
2311
2312         memset(&ctx, 0x0, sizeof(ctx));
2313         ret = ena_get_dev_stats(ena_dev, &ctx, ENA_ADMIN_GET_STATS_TYPE_BASIC);
2314         if (likely(ret == 0))
2315                 memcpy(stats, &ctx.get_resp.u.basic_stats,
2316                        sizeof(ctx.get_resp.u.basic_stats));
2317
2318         return ret;
2319 }
2320 #ifdef ENA_EXTENDED_STATS
2321
2322 int ena_com_get_dev_extended_stats(struct ena_com_dev *ena_dev, char *buff,
2323                                    u32 len)
2324 {
2325         struct ena_com_stats_ctx ctx;
2326         struct ena_admin_aq_get_stats_cmd *get_cmd = &ctx.get_cmd;
2327         ena_mem_handle_t mem_handle;
2328         void *virt_addr;
2329         dma_addr_t phys_addr;
2330         int ret;
2331
2332         ENA_MEM_ALLOC_COHERENT(ena_dev->dmadev, len,
2333                                virt_addr, phys_addr, mem_handle);
2334         if (!virt_addr) {
2335                 ret = ENA_COM_NO_MEM;
2336                 goto done;
2337         }
2338         memset(&ctx, 0x0, sizeof(ctx));
2339         ret = ena_com_mem_addr_set(ena_dev,
2340                                    &get_cmd->u.control_buffer.address,
2341                                    phys_addr);
2342         if (unlikely(ret)) {
2343                 ena_trc_err(ena_dev, "Memory address set failed\n");
2344                 goto free_ext_stats_mem;
2345         }
2346         get_cmd->u.control_buffer.length = len;
2347
2348         get_cmd->device_id = ena_dev->stats_func;
2349         get_cmd->queue_idx = ena_dev->stats_queue;
2350
2351         ret = ena_get_dev_stats(ena_dev, &ctx,
2352                                 ENA_ADMIN_GET_STATS_TYPE_EXTENDED);
2353         if (ret < 0)
2354                 goto free_ext_stats_mem;
2355
2356         ret = snprintf(buff, len, "%s", (char *)virt_addr);
2357
2358 free_ext_stats_mem:
2359         ENA_MEM_FREE_COHERENT(ena_dev->dmadev, len, virt_addr, phys_addr,
2360                               mem_handle);
2361 done:
2362         return ret;
2363 }
2364 #endif
2365
2366 int ena_com_set_dev_mtu(struct ena_com_dev *ena_dev, int mtu)
2367 {
2368         struct ena_com_admin_queue *admin_queue;
2369         struct ena_admin_set_feat_cmd cmd;
2370         struct ena_admin_set_feat_resp resp;
2371         int ret;
2372
2373         if (!ena_com_check_supported_feature_id(ena_dev, ENA_ADMIN_MTU)) {
2374                 ena_trc_dbg(ena_dev, "Feature %d isn't supported\n", ENA_ADMIN_MTU);
2375                 return ENA_COM_UNSUPPORTED;
2376         }
2377
2378         memset(&cmd, 0x0, sizeof(cmd));
2379         admin_queue = &ena_dev->admin_queue;
2380
2381         cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2382         cmd.aq_common_descriptor.flags = 0;
2383         cmd.feat_common.feature_id = ENA_ADMIN_MTU;
2384         cmd.u.mtu.mtu = (u32)mtu;
2385
2386         ret = ena_com_execute_admin_command(admin_queue,
2387                                             (struct ena_admin_aq_entry *)&cmd,
2388                                             sizeof(cmd),
2389                                             (struct ena_admin_acq_entry *)&resp,
2390                                             sizeof(resp));
2391
2392         if (unlikely(ret))
2393                 ena_trc_err(ena_dev, "Failed to set mtu %d. error: %d\n", mtu, ret);
2394
2395         return ret;
2396 }
2397
2398 int ena_com_get_offload_settings(struct ena_com_dev *ena_dev,
2399                                  struct ena_admin_feature_offload_desc *offload)
2400 {
2401         int ret;
2402         struct ena_admin_get_feat_resp resp;
2403
2404         ret = ena_com_get_feature(ena_dev, &resp,
2405                                   ENA_ADMIN_STATELESS_OFFLOAD_CONFIG, 0);
2406         if (unlikely(ret)) {
2407                 ena_trc_err(ena_dev, "Failed to get offload capabilities %d\n", ret);
2408                 return ret;
2409         }
2410
2411         memcpy(offload, &resp.u.offload, sizeof(resp.u.offload));
2412
2413         return 0;
2414 }
2415
2416 int ena_com_set_hash_function(struct ena_com_dev *ena_dev)
2417 {
2418         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
2419         struct ena_rss *rss = &ena_dev->rss;
2420         struct ena_admin_set_feat_cmd cmd;
2421         struct ena_admin_set_feat_resp resp;
2422         struct ena_admin_get_feat_resp get_resp;
2423         int ret;
2424
2425         if (!ena_com_check_supported_feature_id(ena_dev,
2426                                                 ENA_ADMIN_RSS_HASH_FUNCTION)) {
2427                 ena_trc_dbg(ena_dev, "Feature %d isn't supported\n",
2428                             ENA_ADMIN_RSS_HASH_FUNCTION);
2429                 return ENA_COM_UNSUPPORTED;
2430         }
2431
2432         /* Validate hash function is supported */
2433         ret = ena_com_get_feature(ena_dev, &get_resp,
2434                                   ENA_ADMIN_RSS_HASH_FUNCTION, 0);
2435         if (unlikely(ret))
2436                 return ret;
2437
2438         if (!(get_resp.u.flow_hash_func.supported_func & BIT(rss->hash_func))) {
2439                 ena_trc_err(ena_dev, "Func hash %d isn't supported by device, abort\n",
2440                             rss->hash_func);
2441                 return ENA_COM_UNSUPPORTED;
2442         }
2443
2444         memset(&cmd, 0x0, sizeof(cmd));
2445
2446         cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2447         cmd.aq_common_descriptor.flags =
2448                 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
2449         cmd.feat_common.feature_id = ENA_ADMIN_RSS_HASH_FUNCTION;
2450         cmd.u.flow_hash_func.init_val = rss->hash_init_val;
2451         cmd.u.flow_hash_func.selected_func = 1 << rss->hash_func;
2452
2453         ret = ena_com_mem_addr_set(ena_dev,
2454                                    &cmd.control_buffer.address,
2455                                    rss->hash_key_dma_addr);
2456         if (unlikely(ret)) {
2457                 ena_trc_err(ena_dev, "Memory address set failed\n");
2458                 return ret;
2459         }
2460
2461         cmd.control_buffer.length = sizeof(*rss->hash_key);
2462
2463         ret = ena_com_execute_admin_command(admin_queue,
2464                                             (struct ena_admin_aq_entry *)&cmd,
2465                                             sizeof(cmd),
2466                                             (struct ena_admin_acq_entry *)&resp,
2467                                             sizeof(resp));
2468         if (unlikely(ret)) {
2469                 ena_trc_err(ena_dev, "Failed to set hash function %d. error: %d\n",
2470                             rss->hash_func, ret);
2471                 return ENA_COM_INVAL;
2472         }
2473
2474         return 0;
2475 }
2476
2477 int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
2478                                enum ena_admin_hash_functions func,
2479                                const u8 *key, u16 key_len, u32 init_val)
2480 {
2481         struct ena_admin_feature_rss_flow_hash_control *hash_key;
2482         struct ena_admin_get_feat_resp get_resp;
2483         enum ena_admin_hash_functions old_func;
2484         struct ena_rss *rss = &ena_dev->rss;
2485         int rc;
2486
2487         hash_key = rss->hash_key;
2488
2489         /* Make sure size is a mult of DWs */
2490         if (unlikely(key_len & 0x3))
2491                 return ENA_COM_INVAL;
2492
2493         rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2494                                     ENA_ADMIN_RSS_HASH_FUNCTION,
2495                                     rss->hash_key_dma_addr,
2496                                     sizeof(*rss->hash_key), 0);
2497         if (unlikely(rc))
2498                 return rc;
2499
2500         if (!(BIT(func) & get_resp.u.flow_hash_func.supported_func)) {
2501                 ena_trc_err(ena_dev, "Flow hash function %d isn't supported\n", func);
2502                 return ENA_COM_UNSUPPORTED;
2503         }
2504
2505         switch (func) {
2506         case ENA_ADMIN_TOEPLITZ:
2507                 if (key) {
2508                         if (key_len != sizeof(hash_key->key)) {
2509                                 ena_trc_err(ena_dev, "key len (%hu) doesn't equal the supported size (%zu)\n",
2510                                              key_len, sizeof(hash_key->key));
2511                                 return ENA_COM_INVAL;
2512                         }
2513                         memcpy(hash_key->key, key, key_len);
2514                         rss->hash_init_val = init_val;
2515                         hash_key->key_parts = key_len / sizeof(hash_key->key[0]);
2516                 }
2517                 break;
2518         case ENA_ADMIN_CRC32:
2519                 rss->hash_init_val = init_val;
2520                 break;
2521         default:
2522                 ena_trc_err(ena_dev, "Invalid hash function (%d)\n", func);
2523                 return ENA_COM_INVAL;
2524         }
2525
2526         old_func = rss->hash_func;
2527         rss->hash_func = func;
2528         rc = ena_com_set_hash_function(ena_dev);
2529
2530         /* Restore the old function */
2531         if (unlikely(rc))
2532                 rss->hash_func = old_func;
2533
2534         return rc;
2535 }
2536
2537 int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
2538                               enum ena_admin_hash_functions *func)
2539 {
2540         struct ena_rss *rss = &ena_dev->rss;
2541         struct ena_admin_get_feat_resp get_resp;
2542         int rc;
2543
2544         if (unlikely(!func))
2545                 return ENA_COM_INVAL;
2546
2547         rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2548                                     ENA_ADMIN_RSS_HASH_FUNCTION,
2549                                     rss->hash_key_dma_addr,
2550                                     sizeof(*rss->hash_key), 0);
2551         if (unlikely(rc))
2552                 return rc;
2553
2554         /* ENA_FFS() returns 1 in case the lsb is set */
2555         rss->hash_func = ENA_FFS(get_resp.u.flow_hash_func.selected_func);
2556         if (rss->hash_func)
2557                 rss->hash_func--;
2558
2559         *func = rss->hash_func;
2560
2561         return 0;
2562 }
2563
2564 int ena_com_get_hash_key(struct ena_com_dev *ena_dev, u8 *key)
2565 {
2566         struct ena_admin_feature_rss_flow_hash_control *hash_key =
2567                 ena_dev->rss.hash_key;
2568
2569         if (key)
2570                 memcpy(key, hash_key->key,
2571                        (size_t)(hash_key->key_parts) * sizeof(hash_key->key[0]));
2572
2573         return 0;
2574 }
2575
2576 int ena_com_get_hash_ctrl(struct ena_com_dev *ena_dev,
2577                           enum ena_admin_flow_hash_proto proto,
2578                           u16 *fields)
2579 {
2580         struct ena_rss *rss = &ena_dev->rss;
2581         struct ena_admin_get_feat_resp get_resp;
2582         int rc;
2583
2584         rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2585                                     ENA_ADMIN_RSS_HASH_INPUT,
2586                                     rss->hash_ctrl_dma_addr,
2587                                     sizeof(*rss->hash_ctrl), 0);
2588         if (unlikely(rc))
2589                 return rc;
2590
2591         if (fields)
2592                 *fields = rss->hash_ctrl->selected_fields[proto].fields;
2593
2594         return 0;
2595 }
2596
2597 int ena_com_set_hash_ctrl(struct ena_com_dev *ena_dev)
2598 {
2599         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
2600         struct ena_rss *rss = &ena_dev->rss;
2601         struct ena_admin_feature_rss_hash_control *hash_ctrl = rss->hash_ctrl;
2602         struct ena_admin_set_feat_cmd cmd;
2603         struct ena_admin_set_feat_resp resp;
2604         int ret;
2605
2606         if (!ena_com_check_supported_feature_id(ena_dev,
2607                                                 ENA_ADMIN_RSS_HASH_INPUT)) {
2608                 ena_trc_dbg(ena_dev, "Feature %d isn't supported\n",
2609                             ENA_ADMIN_RSS_HASH_INPUT);
2610                 return ENA_COM_UNSUPPORTED;
2611         }
2612
2613         memset(&cmd, 0x0, sizeof(cmd));
2614
2615         cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2616         cmd.aq_common_descriptor.flags =
2617                 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
2618         cmd.feat_common.feature_id = ENA_ADMIN_RSS_HASH_INPUT;
2619         cmd.u.flow_hash_input.enabled_input_sort =
2620                 ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L3_SORT_MASK |
2621                 ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L4_SORT_MASK;
2622
2623         ret = ena_com_mem_addr_set(ena_dev,
2624                                    &cmd.control_buffer.address,
2625                                    rss->hash_ctrl_dma_addr);
2626         if (unlikely(ret)) {
2627                 ena_trc_err(ena_dev, "Memory address set failed\n");
2628                 return ret;
2629         }
2630         cmd.control_buffer.length = sizeof(*hash_ctrl);
2631
2632         ret = ena_com_execute_admin_command(admin_queue,
2633                                             (struct ena_admin_aq_entry *)&cmd,
2634                                             sizeof(cmd),
2635                                             (struct ena_admin_acq_entry *)&resp,
2636                                             sizeof(resp));
2637         if (unlikely(ret))
2638                 ena_trc_err(ena_dev, "Failed to set hash input. error: %d\n", ret);
2639
2640         return ret;
2641 }
2642
2643 int ena_com_set_default_hash_ctrl(struct ena_com_dev *ena_dev)
2644 {
2645         struct ena_rss *rss = &ena_dev->rss;
2646         struct ena_admin_feature_rss_hash_control *hash_ctrl =
2647                 rss->hash_ctrl;
2648         u16 available_fields = 0;
2649         int rc, i;
2650
2651         /* Get the supported hash input */
2652         rc = ena_com_get_hash_ctrl(ena_dev, 0, NULL);
2653         if (unlikely(rc))
2654                 return rc;
2655
2656         hash_ctrl->selected_fields[ENA_ADMIN_RSS_TCP4].fields =
2657                 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2658                 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2659
2660         hash_ctrl->selected_fields[ENA_ADMIN_RSS_UDP4].fields =
2661                 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2662                 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2663
2664         hash_ctrl->selected_fields[ENA_ADMIN_RSS_TCP6].fields =
2665                 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2666                 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2667
2668         hash_ctrl->selected_fields[ENA_ADMIN_RSS_UDP6].fields =
2669                 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
2670                 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
2671
2672         hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP4].fields =
2673                 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
2674
2675         hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP6].fields =
2676                 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
2677
2678         hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP4_FRAG].fields =
2679                 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
2680
2681         hash_ctrl->selected_fields[ENA_ADMIN_RSS_NOT_IP].fields =
2682                 ENA_ADMIN_RSS_L2_DA | ENA_ADMIN_RSS_L2_SA;
2683
2684         for (i = 0; i < ENA_ADMIN_RSS_PROTO_NUM; i++) {
2685                 available_fields = hash_ctrl->selected_fields[i].fields &
2686                                 hash_ctrl->supported_fields[i].fields;
2687                 if (available_fields != hash_ctrl->selected_fields[i].fields) {
2688                         ena_trc_err(ena_dev, "Hash control doesn't support all the desire configuration. proto %x supported %x selected %x\n",
2689                                     i, hash_ctrl->supported_fields[i].fields,
2690                                     hash_ctrl->selected_fields[i].fields);
2691                         return ENA_COM_UNSUPPORTED;
2692                 }
2693         }
2694
2695         rc = ena_com_set_hash_ctrl(ena_dev);
2696
2697         /* In case of failure, restore the old hash ctrl */
2698         if (unlikely(rc))
2699                 ena_com_get_hash_ctrl(ena_dev, 0, NULL);
2700
2701         return rc;
2702 }
2703
2704 int ena_com_fill_hash_ctrl(struct ena_com_dev *ena_dev,
2705                            enum ena_admin_flow_hash_proto proto,
2706                            u16 hash_fields)
2707 {
2708         struct ena_rss *rss = &ena_dev->rss;
2709         struct ena_admin_feature_rss_hash_control *hash_ctrl = rss->hash_ctrl;
2710         u16 supported_fields;
2711         int rc;
2712
2713         if (proto >= ENA_ADMIN_RSS_PROTO_NUM) {
2714                 ena_trc_err(ena_dev, "Invalid proto num (%u)\n", proto);
2715                 return ENA_COM_INVAL;
2716         }
2717
2718         /* Get the ctrl table */
2719         rc = ena_com_get_hash_ctrl(ena_dev, proto, NULL);
2720         if (unlikely(rc))
2721                 return rc;
2722
2723         /* Make sure all the fields are supported */
2724         supported_fields = hash_ctrl->supported_fields[proto].fields;
2725         if ((hash_fields & supported_fields) != hash_fields) {
2726                 ena_trc_err(ena_dev, "Proto %d doesn't support the required fields %x. supports only: %x\n",
2727                             proto, hash_fields, supported_fields);
2728         }
2729
2730         hash_ctrl->selected_fields[proto].fields = hash_fields;
2731
2732         rc = ena_com_set_hash_ctrl(ena_dev);
2733
2734         /* In case of failure, restore the old hash ctrl */
2735         if (unlikely(rc))
2736                 ena_com_get_hash_ctrl(ena_dev, 0, NULL);
2737
2738         return 0;
2739 }
2740
2741 int ena_com_indirect_table_fill_entry(struct ena_com_dev *ena_dev,
2742                                       u16 entry_idx, u16 entry_value)
2743 {
2744         struct ena_rss *rss = &ena_dev->rss;
2745
2746         if (unlikely(entry_idx >= (1 << rss->tbl_log_size)))
2747                 return ENA_COM_INVAL;
2748
2749         if (unlikely((entry_value > ENA_TOTAL_NUM_QUEUES)))
2750                 return ENA_COM_INVAL;
2751
2752         rss->host_rss_ind_tbl[entry_idx] = entry_value;
2753
2754         return 0;
2755 }
2756
2757 int ena_com_indirect_table_set(struct ena_com_dev *ena_dev)
2758 {
2759         struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
2760         struct ena_rss *rss = &ena_dev->rss;
2761         struct ena_admin_set_feat_cmd cmd;
2762         struct ena_admin_set_feat_resp resp;
2763         int ret;
2764
2765         if (!ena_com_check_supported_feature_id(ena_dev,
2766                                                 ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG)) {
2767                 ena_trc_dbg(ena_dev, "Feature %d isn't supported\n",
2768                             ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG);
2769                 return ENA_COM_UNSUPPORTED;
2770         }
2771
2772         ret = ena_com_ind_tbl_convert_to_device(ena_dev);
2773         if (ret) {
2774                 ena_trc_err(ena_dev, "Failed to convert host indirection table to device table\n");
2775                 return ret;
2776         }
2777
2778         memset(&cmd, 0x0, sizeof(cmd));
2779
2780         cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2781         cmd.aq_common_descriptor.flags =
2782                 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
2783         cmd.feat_common.feature_id = ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG;
2784         cmd.u.ind_table.size = rss->tbl_log_size;
2785         cmd.u.ind_table.inline_index = 0xFFFFFFFF;
2786
2787         ret = ena_com_mem_addr_set(ena_dev,
2788                                    &cmd.control_buffer.address,
2789                                    rss->rss_ind_tbl_dma_addr);
2790         if (unlikely(ret)) {
2791                 ena_trc_err(ena_dev, "Memory address set failed\n");
2792                 return ret;
2793         }
2794
2795         cmd.control_buffer.length = (u32)(1ULL << rss->tbl_log_size) *
2796                 sizeof(struct ena_admin_rss_ind_table_entry);
2797
2798         ret = ena_com_execute_admin_command(admin_queue,
2799                                             (struct ena_admin_aq_entry *)&cmd,
2800                                             sizeof(cmd),
2801                                             (struct ena_admin_acq_entry *)&resp,
2802                                             sizeof(resp));
2803
2804         if (unlikely(ret))
2805                 ena_trc_err(ena_dev, "Failed to set indirect table. error: %d\n", ret);
2806
2807         return ret;
2808 }
2809
2810 int ena_com_indirect_table_get(struct ena_com_dev *ena_dev, u32 *ind_tbl)
2811 {
2812         struct ena_rss *rss = &ena_dev->rss;
2813         struct ena_admin_get_feat_resp get_resp;
2814         u32 tbl_size;
2815         int i, rc;
2816
2817         tbl_size = (u32)(1ULL << rss->tbl_log_size) *
2818                 sizeof(struct ena_admin_rss_ind_table_entry);
2819
2820         rc = ena_com_get_feature_ex(ena_dev, &get_resp,
2821                                     ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG,
2822                                     rss->rss_ind_tbl_dma_addr,
2823                                     tbl_size, 0);
2824         if (unlikely(rc))
2825                 return rc;
2826
2827         if (!ind_tbl)
2828                 return 0;
2829
2830         for (i = 0; i < (1 << rss->tbl_log_size); i++)
2831                 ind_tbl[i] = rss->host_rss_ind_tbl[i];
2832
2833         return 0;
2834 }
2835
2836 int ena_com_rss_init(struct ena_com_dev *ena_dev, u16 indr_tbl_log_size)
2837 {
2838         int rc;
2839
2840         memset(&ena_dev->rss, 0x0, sizeof(ena_dev->rss));
2841
2842         rc = ena_com_indirect_table_allocate(ena_dev, indr_tbl_log_size);
2843         if (unlikely(rc))
2844                 goto err_indr_tbl;
2845
2846         /* The following function might return unsupported in case the
2847          * device doesn't support setting the key / hash function. We can safely
2848          * ignore this error and have indirection table support only.
2849          */
2850         rc = ena_com_hash_key_allocate(ena_dev);
2851         if (likely(!rc))
2852                 ena_com_hash_key_fill_default_key(ena_dev);
2853         else if (rc != ENA_COM_UNSUPPORTED)
2854                 goto err_hash_key;
2855
2856         rc = ena_com_hash_ctrl_init(ena_dev);
2857         if (unlikely(rc))
2858                 goto err_hash_ctrl;
2859
2860         return 0;
2861
2862 err_hash_ctrl:
2863         ena_com_hash_key_destroy(ena_dev);
2864 err_hash_key:
2865         ena_com_indirect_table_destroy(ena_dev);
2866 err_indr_tbl:
2867
2868         return rc;
2869 }
2870
2871 void ena_com_rss_destroy(struct ena_com_dev *ena_dev)
2872 {
2873         ena_com_indirect_table_destroy(ena_dev);
2874         ena_com_hash_key_destroy(ena_dev);
2875         ena_com_hash_ctrl_destroy(ena_dev);
2876
2877         memset(&ena_dev->rss, 0x0, sizeof(ena_dev->rss));
2878 }
2879
2880 int ena_com_allocate_host_info(struct ena_com_dev *ena_dev)
2881 {
2882         struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2883
2884         ENA_MEM_ALLOC_COHERENT(ena_dev->dmadev,
2885                                SZ_4K,
2886                                host_attr->host_info,
2887                                host_attr->host_info_dma_addr,
2888                                host_attr->host_info_dma_handle);
2889         if (unlikely(!host_attr->host_info))
2890                 return ENA_COM_NO_MEM;
2891
2892         host_attr->host_info->ena_spec_version = ((ENA_COMMON_SPEC_VERSION_MAJOR <<
2893                 ENA_REGS_VERSION_MAJOR_VERSION_SHIFT) |
2894                 (ENA_COMMON_SPEC_VERSION_MINOR));
2895
2896         return 0;
2897 }
2898
2899 int ena_com_allocate_debug_area(struct ena_com_dev *ena_dev,
2900                                 u32 debug_area_size)
2901 {
2902         struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2903
2904         ENA_MEM_ALLOC_COHERENT(ena_dev->dmadev,
2905                                debug_area_size,
2906                                host_attr->debug_area_virt_addr,
2907                                host_attr->debug_area_dma_addr,
2908                                host_attr->debug_area_dma_handle);
2909         if (unlikely(!host_attr->debug_area_virt_addr)) {
2910                 host_attr->debug_area_size = 0;
2911                 return ENA_COM_NO_MEM;
2912         }
2913
2914         host_attr->debug_area_size = debug_area_size;
2915
2916         return 0;
2917 }
2918
2919 void ena_com_delete_host_info(struct ena_com_dev *ena_dev)
2920 {
2921         struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2922
2923         if (host_attr->host_info) {
2924                 ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
2925                                       SZ_4K,
2926                                       host_attr->host_info,
2927                                       host_attr->host_info_dma_addr,
2928                                       host_attr->host_info_dma_handle);
2929                 host_attr->host_info = NULL;
2930         }
2931 }
2932
2933 void ena_com_delete_debug_area(struct ena_com_dev *ena_dev)
2934 {
2935         struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2936
2937         if (host_attr->debug_area_virt_addr) {
2938                 ENA_MEM_FREE_COHERENT(ena_dev->dmadev,
2939                                       host_attr->debug_area_size,
2940                                       host_attr->debug_area_virt_addr,
2941                                       host_attr->debug_area_dma_addr,
2942                                       host_attr->debug_area_dma_handle);
2943                 host_attr->debug_area_virt_addr = NULL;
2944         }
2945 }
2946
2947 int ena_com_set_host_attributes(struct ena_com_dev *ena_dev)
2948 {
2949         struct ena_host_attribute *host_attr = &ena_dev->host_attr;
2950         struct ena_com_admin_queue *admin_queue;
2951         struct ena_admin_set_feat_cmd cmd;
2952         struct ena_admin_set_feat_resp resp;
2953
2954         int ret;
2955
2956         /* Host attribute config is called before ena_com_get_dev_attr_feat
2957          * so ena_com can't check if the feature is supported.
2958          */
2959
2960         memset(&cmd, 0x0, sizeof(cmd));
2961         admin_queue = &ena_dev->admin_queue;
2962
2963         cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
2964         cmd.feat_common.feature_id = ENA_ADMIN_HOST_ATTR_CONFIG;
2965
2966         ret = ena_com_mem_addr_set(ena_dev,
2967                                    &cmd.u.host_attr.debug_ba,
2968                                    host_attr->debug_area_dma_addr);
2969         if (unlikely(ret)) {
2970                 ena_trc_err(ena_dev, "Memory address set failed\n");
2971                 return ret;
2972         }
2973
2974         ret = ena_com_mem_addr_set(ena_dev,
2975                                    &cmd.u.host_attr.os_info_ba,
2976                                    host_attr->host_info_dma_addr);
2977         if (unlikely(ret)) {
2978                 ena_trc_err(ena_dev, "Memory address set failed\n");
2979                 return ret;
2980         }
2981
2982         cmd.u.host_attr.debug_area_size = host_attr->debug_area_size;
2983
2984         ret = ena_com_execute_admin_command(admin_queue,
2985                                             (struct ena_admin_aq_entry *)&cmd,
2986                                             sizeof(cmd),
2987                                             (struct ena_admin_acq_entry *)&resp,
2988                                             sizeof(resp));
2989
2990         if (unlikely(ret))
2991                 ena_trc_err(ena_dev, "Failed to set host attributes: %d\n", ret);
2992
2993         return ret;
2994 }
2995
2996 /* Interrupt moderation */
2997 bool ena_com_interrupt_moderation_supported(struct ena_com_dev *ena_dev)
2998 {
2999         return ena_com_check_supported_feature_id(ena_dev,
3000                                                   ENA_ADMIN_INTERRUPT_MODERATION);
3001 }
3002
3003 static int ena_com_update_nonadaptive_moderation_interval(struct ena_com_dev *ena_dev,
3004                                                           u32 coalesce_usecs,
3005                                                           u32 intr_delay_resolution,
3006                                                           u32 *intr_moder_interval)
3007 {
3008         if (!intr_delay_resolution) {
3009                 ena_trc_err(ena_dev, "Illegal interrupt delay granularity value\n");
3010                 return ENA_COM_FAULT;
3011         }
3012
3013         *intr_moder_interval = coalesce_usecs / intr_delay_resolution;
3014
3015         return 0;
3016 }
3017
3018 int ena_com_update_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev,
3019                                                       u32 tx_coalesce_usecs)
3020 {
3021         return ena_com_update_nonadaptive_moderation_interval(ena_dev,
3022                                                               tx_coalesce_usecs,
3023                                                               ena_dev->intr_delay_resolution,
3024                                                               &ena_dev->intr_moder_tx_interval);
3025 }
3026
3027 int ena_com_update_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev,
3028                                                       u32 rx_coalesce_usecs)
3029 {
3030         return ena_com_update_nonadaptive_moderation_interval(ena_dev,
3031                                                               rx_coalesce_usecs,
3032                                                               ena_dev->intr_delay_resolution,
3033                                                               &ena_dev->intr_moder_rx_interval);
3034 }
3035
3036 int ena_com_init_interrupt_moderation(struct ena_com_dev *ena_dev)
3037 {
3038         struct ena_admin_get_feat_resp get_resp;
3039         u16 delay_resolution;
3040         int rc;
3041
3042         rc = ena_com_get_feature(ena_dev, &get_resp,
3043                                  ENA_ADMIN_INTERRUPT_MODERATION, 0);
3044
3045         if (rc) {
3046                 if (rc == ENA_COM_UNSUPPORTED) {
3047                         ena_trc_dbg(ena_dev, "Feature %d isn't supported\n",
3048                                     ENA_ADMIN_INTERRUPT_MODERATION);
3049                         rc = 0;
3050                 } else {
3051                         ena_trc_err(ena_dev,
3052                                     "Failed to get interrupt moderation admin cmd. rc: %d\n", rc);
3053                 }
3054
3055                 /* no moderation supported, disable adaptive support */
3056                 ena_com_disable_adaptive_moderation(ena_dev);
3057                 return rc;
3058         }
3059
3060         /* if moderation is supported by device we set adaptive moderation */
3061         delay_resolution = get_resp.u.intr_moderation.intr_delay_resolution;
3062         ena_com_update_intr_delay_resolution(ena_dev, delay_resolution);
3063
3064         /* Disable adaptive moderation by default - can be enabled later */
3065         ena_com_disable_adaptive_moderation(ena_dev);
3066
3067         return 0;
3068 }
3069
3070 unsigned int ena_com_get_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev)
3071 {
3072         return ena_dev->intr_moder_tx_interval;
3073 }
3074
3075 unsigned int ena_com_get_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev)
3076 {
3077         return ena_dev->intr_moder_rx_interval;
3078 }
3079
3080 int ena_com_config_dev_mode(struct ena_com_dev *ena_dev,
3081                             struct ena_admin_feature_llq_desc *llq_features,
3082                             struct ena_llq_configurations *llq_default_cfg)
3083 {
3084         struct ena_com_llq_info *llq_info = &ena_dev->llq_info;
3085         int rc;
3086
3087         if (!llq_features->max_llq_num) {
3088                 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
3089                 return 0;
3090         }
3091
3092         rc = ena_com_config_llq_info(ena_dev, llq_features, llq_default_cfg);
3093         if (rc)
3094                 return rc;
3095
3096         ena_dev->tx_max_header_size = llq_info->desc_list_entry_size -
3097                 (llq_info->descs_num_before_header * sizeof(struct ena_eth_io_tx_desc));
3098
3099         if (unlikely(ena_dev->tx_max_header_size == 0)) {
3100                 ena_trc_err(ena_dev, "The size of the LLQ entry is smaller than needed\n");
3101                 return -EINVAL;
3102         }
3103
3104         ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_DEV;
3105
3106         return 0;
3107 }