1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2 /* 3 * Copyright 2015-2020 Amazon.com, Inc. or its affiliates. All rights reserved. 4 */ 5 6 #include "ena_com.h" 7 8 /*****************************************************************************/ 9 /*****************************************************************************/ 10 11 /* Timeout in micro-sec */ 12 #define ADMIN_CMD_TIMEOUT_US (3000000) 13 14 #define ENA_ASYNC_QUEUE_DEPTH 16 15 #define ENA_ADMIN_QUEUE_DEPTH 32 16 17 18 #define ENA_CTRL_MAJOR 0 19 #define ENA_CTRL_MINOR 0 20 #define ENA_CTRL_SUB_MINOR 1 21 22 #define MIN_ENA_CTRL_VER \ 23 (((ENA_CTRL_MAJOR) << \ 24 (ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_SHIFT)) | \ 25 ((ENA_CTRL_MINOR) << \ 26 (ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_SHIFT)) | \ 27 (ENA_CTRL_SUB_MINOR)) 28 29 #define ENA_DMA_ADDR_TO_UINT32_LOW(x) ((u32)((u64)(x))) 30 #define ENA_DMA_ADDR_TO_UINT32_HIGH(x) ((u32)(((u64)(x)) >> 32)) 31 32 #define ENA_MMIO_READ_TIMEOUT 0xFFFFFFFF 33 34 #define ENA_COM_BOUNCE_BUFFER_CNTRL_CNT 4 35 36 #define ENA_REGS_ADMIN_INTR_MASK 1 37 38 #define ENA_MIN_ADMIN_POLL_US 100 39 40 #define ENA_MAX_ADMIN_POLL_US 5000 41 42 /*****************************************************************************/ 43 /*****************************************************************************/ 44 /*****************************************************************************/ 45 46 enum ena_cmd_status { 47 ENA_CMD_SUBMITTED, 48 ENA_CMD_COMPLETED, 49 /* Abort - canceled by the driver */ 50 ENA_CMD_ABORTED, 51 }; 52 53 struct ena_comp_ctx { 54 struct completion wait_event; 55 struct ena_admin_acq_entry *user_cqe; 56 u32 comp_size; 57 enum ena_cmd_status status; 58 /* status from the device */ 59 u8 comp_status; 60 u8 cmd_opcode; 61 bool occupied; 62 }; 63 64 struct ena_com_stats_ctx { 65 struct ena_admin_aq_get_stats_cmd get_cmd; 66 struct ena_admin_acq_get_stats_resp get_resp; 67 }; 68 69 static int ena_com_mem_addr_set(struct ena_com_dev *ena_dev, 70 struct ena_common_mem_addr *ena_addr, 71 dma_addr_t addr) 72 { 73 if ((addr & GENMASK_ULL(ena_dev->dma_addr_bits - 1, 0)) != addr) { 74 netdev_err(ena_dev->net_device, 75 "DMA address has more bits that the device supports\n"); 76 return -EINVAL; 77 } 78 79 ena_addr->mem_addr_low = lower_32_bits(addr); 80 ena_addr->mem_addr_high = (u16)upper_32_bits(addr); 81 82 return 0; 83 } 84 85 static int ena_com_admin_init_sq(struct ena_com_admin_queue *admin_queue) 86 { 87 struct ena_com_dev *ena_dev = admin_queue->ena_dev; 88 struct ena_com_admin_sq *sq = &admin_queue->sq; 89 u16 size = ADMIN_SQ_SIZE(admin_queue->q_depth); 90 91 sq->entries = dma_alloc_coherent(admin_queue->q_dmadev, size, 92 &sq->dma_addr, GFP_KERNEL); 93 94 if (!sq->entries) { 95 netdev_err(ena_dev->net_device, "Memory allocation failed\n"); 96 return -ENOMEM; 97 } 98 99 sq->head = 0; 100 sq->tail = 0; 101 sq->phase = 1; 102 103 sq->db_addr = NULL; 104 105 return 0; 106 } 107 108 static int ena_com_admin_init_cq(struct ena_com_admin_queue *admin_queue) 109 { 110 struct ena_com_dev *ena_dev = admin_queue->ena_dev; 111 struct ena_com_admin_cq *cq = &admin_queue->cq; 112 u16 size = ADMIN_CQ_SIZE(admin_queue->q_depth); 113 114 cq->entries = dma_alloc_coherent(admin_queue->q_dmadev, size, 115 &cq->dma_addr, GFP_KERNEL); 116 117 if (!cq->entries) { 118 netdev_err(ena_dev->net_device, "Memory allocation failed\n"); 119 return -ENOMEM; 120 } 121 122 cq->head = 0; 123 cq->phase = 1; 124 125 return 0; 126 } 127 128 static int ena_com_admin_init_aenq(struct ena_com_dev *ena_dev, 129 struct ena_aenq_handlers *aenq_handlers) 130 { 131 struct ena_com_aenq *aenq = &ena_dev->aenq; 132 u32 addr_low, addr_high, aenq_caps; 133 u16 size; 134 135 ena_dev->aenq.q_depth = ENA_ASYNC_QUEUE_DEPTH; 136 size = ADMIN_AENQ_SIZE(ENA_ASYNC_QUEUE_DEPTH); 137 aenq->entries = dma_alloc_coherent(ena_dev->dmadev, size, 138 &aenq->dma_addr, GFP_KERNEL); 139 140 if (!aenq->entries) { 141 netdev_err(ena_dev->net_device, "Memory allocation failed\n"); 142 return -ENOMEM; 143 } 144 145 aenq->head = aenq->q_depth; 146 aenq->phase = 1; 147 148 addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(aenq->dma_addr); 149 addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(aenq->dma_addr); 150 151 writel(addr_low, ena_dev->reg_bar + ENA_REGS_AENQ_BASE_LO_OFF); 152 writel(addr_high, ena_dev->reg_bar + ENA_REGS_AENQ_BASE_HI_OFF); 153 154 aenq_caps = 0; 155 aenq_caps |= ena_dev->aenq.q_depth & ENA_REGS_AENQ_CAPS_AENQ_DEPTH_MASK; 156 aenq_caps |= (sizeof(struct ena_admin_aenq_entry) 157 << ENA_REGS_AENQ_CAPS_AENQ_ENTRY_SIZE_SHIFT) & 158 ENA_REGS_AENQ_CAPS_AENQ_ENTRY_SIZE_MASK; 159 writel(aenq_caps, ena_dev->reg_bar + ENA_REGS_AENQ_CAPS_OFF); 160 161 if (unlikely(!aenq_handlers)) { 162 netdev_err(ena_dev->net_device, 163 "AENQ handlers pointer is NULL\n"); 164 return -EINVAL; 165 } 166 167 aenq->aenq_handlers = aenq_handlers; 168 169 return 0; 170 } 171 172 static void comp_ctxt_release(struct ena_com_admin_queue *queue, 173 struct ena_comp_ctx *comp_ctx) 174 { 175 comp_ctx->occupied = false; 176 atomic_dec(&queue->outstanding_cmds); 177 } 178 179 static struct ena_comp_ctx *get_comp_ctxt(struct ena_com_admin_queue *admin_queue, 180 u16 command_id, bool capture) 181 { 182 if (unlikely(command_id >= admin_queue->q_depth)) { 183 netdev_err(admin_queue->ena_dev->net_device, 184 "Command id is larger than the queue size. cmd_id: %u queue size %d\n", 185 command_id, admin_queue->q_depth); 186 return NULL; 187 } 188 189 if (unlikely(!admin_queue->comp_ctx)) { 190 netdev_err(admin_queue->ena_dev->net_device, 191 "Completion context is NULL\n"); 192 return NULL; 193 } 194 195 if (unlikely(admin_queue->comp_ctx[command_id].occupied && capture)) { 196 netdev_err(admin_queue->ena_dev->net_device, 197 "Completion context is occupied\n"); 198 return NULL; 199 } 200 201 if (capture) { 202 atomic_inc(&admin_queue->outstanding_cmds); 203 admin_queue->comp_ctx[command_id].occupied = true; 204 } 205 206 return &admin_queue->comp_ctx[command_id]; 207 } 208 209 static struct ena_comp_ctx *__ena_com_submit_admin_cmd(struct ena_com_admin_queue *admin_queue, 210 struct ena_admin_aq_entry *cmd, 211 size_t cmd_size_in_bytes, 212 struct ena_admin_acq_entry *comp, 213 size_t comp_size_in_bytes) 214 { 215 struct ena_comp_ctx *comp_ctx; 216 u16 tail_masked, cmd_id; 217 u16 queue_size_mask; 218 u16 cnt; 219 220 queue_size_mask = admin_queue->q_depth - 1; 221 222 tail_masked = admin_queue->sq.tail & queue_size_mask; 223 224 /* In case of queue FULL */ 225 cnt = (u16)atomic_read(&admin_queue->outstanding_cmds); 226 if (cnt >= admin_queue->q_depth) { 227 netdev_dbg(admin_queue->ena_dev->net_device, 228 "Admin queue is full.\n"); 229 admin_queue->stats.out_of_space++; 230 return ERR_PTR(-ENOSPC); 231 } 232 233 cmd_id = admin_queue->curr_cmd_id; 234 235 cmd->aq_common_descriptor.flags |= admin_queue->sq.phase & 236 ENA_ADMIN_AQ_COMMON_DESC_PHASE_MASK; 237 238 cmd->aq_common_descriptor.command_id |= cmd_id & 239 ENA_ADMIN_AQ_COMMON_DESC_COMMAND_ID_MASK; 240 241 comp_ctx = get_comp_ctxt(admin_queue, cmd_id, true); 242 if (unlikely(!comp_ctx)) 243 return ERR_PTR(-EINVAL); 244 245 comp_ctx->status = ENA_CMD_SUBMITTED; 246 comp_ctx->comp_size = (u32)comp_size_in_bytes; 247 comp_ctx->user_cqe = comp; 248 comp_ctx->cmd_opcode = cmd->aq_common_descriptor.opcode; 249 250 reinit_completion(&comp_ctx->wait_event); 251 252 memcpy(&admin_queue->sq.entries[tail_masked], cmd, cmd_size_in_bytes); 253 254 admin_queue->curr_cmd_id = (admin_queue->curr_cmd_id + 1) & 255 queue_size_mask; 256 257 admin_queue->sq.tail++; 258 admin_queue->stats.submitted_cmd++; 259 260 if (unlikely((admin_queue->sq.tail & queue_size_mask) == 0)) 261 admin_queue->sq.phase = !admin_queue->sq.phase; 262 263 writel(admin_queue->sq.tail, admin_queue->sq.db_addr); 264 265 return comp_ctx; 266 } 267 268 static int ena_com_init_comp_ctxt(struct ena_com_admin_queue *admin_queue) 269 { 270 struct ena_com_dev *ena_dev = admin_queue->ena_dev; 271 size_t size = admin_queue->q_depth * sizeof(struct ena_comp_ctx); 272 struct ena_comp_ctx *comp_ctx; 273 u16 i; 274 275 admin_queue->comp_ctx = 276 devm_kzalloc(admin_queue->q_dmadev, size, GFP_KERNEL); 277 if (unlikely(!admin_queue->comp_ctx)) { 278 netdev_err(ena_dev->net_device, "Memory allocation failed\n"); 279 return -ENOMEM; 280 } 281 282 for (i = 0; i < admin_queue->q_depth; i++) { 283 comp_ctx = get_comp_ctxt(admin_queue, i, false); 284 if (comp_ctx) 285 init_completion(&comp_ctx->wait_event); 286 } 287 288 return 0; 289 } 290 291 static struct ena_comp_ctx *ena_com_submit_admin_cmd(struct ena_com_admin_queue *admin_queue, 292 struct ena_admin_aq_entry *cmd, 293 size_t cmd_size_in_bytes, 294 struct ena_admin_acq_entry *comp, 295 size_t comp_size_in_bytes) 296 { 297 unsigned long flags = 0; 298 struct ena_comp_ctx *comp_ctx; 299 300 spin_lock_irqsave(&admin_queue->q_lock, flags); 301 if (unlikely(!admin_queue->running_state)) { 302 spin_unlock_irqrestore(&admin_queue->q_lock, flags); 303 return ERR_PTR(-ENODEV); 304 } 305 comp_ctx = __ena_com_submit_admin_cmd(admin_queue, cmd, 306 cmd_size_in_bytes, 307 comp, 308 comp_size_in_bytes); 309 if (IS_ERR(comp_ctx)) 310 admin_queue->running_state = false; 311 spin_unlock_irqrestore(&admin_queue->q_lock, flags); 312 313 return comp_ctx; 314 } 315 316 static int ena_com_init_io_sq(struct ena_com_dev *ena_dev, 317 struct ena_com_create_io_ctx *ctx, 318 struct ena_com_io_sq *io_sq) 319 { 320 size_t size; 321 int dev_node = 0; 322 323 memset(&io_sq->desc_addr, 0x0, sizeof(io_sq->desc_addr)); 324 325 io_sq->dma_addr_bits = (u8)ena_dev->dma_addr_bits; 326 io_sq->desc_entry_size = 327 (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX) ? 328 sizeof(struct ena_eth_io_tx_desc) : 329 sizeof(struct ena_eth_io_rx_desc); 330 331 size = io_sq->desc_entry_size * io_sq->q_depth; 332 333 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST) { 334 dev_node = dev_to_node(ena_dev->dmadev); 335 set_dev_node(ena_dev->dmadev, ctx->numa_node); 336 io_sq->desc_addr.virt_addr = 337 dma_alloc_coherent(ena_dev->dmadev, size, 338 &io_sq->desc_addr.phys_addr, 339 GFP_KERNEL); 340 set_dev_node(ena_dev->dmadev, dev_node); 341 if (!io_sq->desc_addr.virt_addr) { 342 io_sq->desc_addr.virt_addr = 343 dma_alloc_coherent(ena_dev->dmadev, size, 344 &io_sq->desc_addr.phys_addr, 345 GFP_KERNEL); 346 } 347 348 if (!io_sq->desc_addr.virt_addr) { 349 netdev_err(ena_dev->net_device, 350 "Memory allocation failed\n"); 351 return -ENOMEM; 352 } 353 } 354 355 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) { 356 /* Allocate bounce buffers */ 357 io_sq->bounce_buf_ctrl.buffer_size = 358 ena_dev->llq_info.desc_list_entry_size; 359 io_sq->bounce_buf_ctrl.buffers_num = 360 ENA_COM_BOUNCE_BUFFER_CNTRL_CNT; 361 io_sq->bounce_buf_ctrl.next_to_use = 0; 362 363 size = io_sq->bounce_buf_ctrl.buffer_size * 364 io_sq->bounce_buf_ctrl.buffers_num; 365 366 dev_node = dev_to_node(ena_dev->dmadev); 367 set_dev_node(ena_dev->dmadev, ctx->numa_node); 368 io_sq->bounce_buf_ctrl.base_buffer = 369 devm_kzalloc(ena_dev->dmadev, size, GFP_KERNEL); 370 set_dev_node(ena_dev->dmadev, dev_node); 371 if (!io_sq->bounce_buf_ctrl.base_buffer) 372 io_sq->bounce_buf_ctrl.base_buffer = 373 devm_kzalloc(ena_dev->dmadev, size, GFP_KERNEL); 374 375 if (!io_sq->bounce_buf_ctrl.base_buffer) { 376 netdev_err(ena_dev->net_device, 377 "Bounce buffer memory allocation failed\n"); 378 return -ENOMEM; 379 } 380 381 memcpy(&io_sq->llq_info, &ena_dev->llq_info, 382 sizeof(io_sq->llq_info)); 383 384 /* Initiate the first bounce buffer */ 385 io_sq->llq_buf_ctrl.curr_bounce_buf = 386 ena_com_get_next_bounce_buffer(&io_sq->bounce_buf_ctrl); 387 memset(io_sq->llq_buf_ctrl.curr_bounce_buf, 388 0x0, io_sq->llq_info.desc_list_entry_size); 389 io_sq->llq_buf_ctrl.descs_left_in_line = 390 io_sq->llq_info.descs_num_before_header; 391 io_sq->disable_meta_caching = 392 io_sq->llq_info.disable_meta_caching; 393 394 if (io_sq->llq_info.max_entries_in_tx_burst > 0) 395 io_sq->entries_in_tx_burst_left = 396 io_sq->llq_info.max_entries_in_tx_burst; 397 } 398 399 io_sq->tail = 0; 400 io_sq->next_to_comp = 0; 401 io_sq->phase = 1; 402 403 return 0; 404 } 405 406 static int ena_com_init_io_cq(struct ena_com_dev *ena_dev, 407 struct ena_com_create_io_ctx *ctx, 408 struct ena_com_io_cq *io_cq) 409 { 410 size_t size; 411 int prev_node = 0; 412 413 memset(&io_cq->cdesc_addr, 0x0, sizeof(io_cq->cdesc_addr)); 414 415 /* Use the basic completion descriptor for Rx */ 416 io_cq->cdesc_entry_size_in_bytes = 417 (io_cq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX) ? 418 sizeof(struct ena_eth_io_tx_cdesc) : 419 sizeof(struct ena_eth_io_rx_cdesc_base); 420 421 size = io_cq->cdesc_entry_size_in_bytes * io_cq->q_depth; 422 423 prev_node = dev_to_node(ena_dev->dmadev); 424 set_dev_node(ena_dev->dmadev, ctx->numa_node); 425 io_cq->cdesc_addr.virt_addr = 426 dma_alloc_coherent(ena_dev->dmadev, size, 427 &io_cq->cdesc_addr.phys_addr, GFP_KERNEL); 428 set_dev_node(ena_dev->dmadev, prev_node); 429 if (!io_cq->cdesc_addr.virt_addr) { 430 io_cq->cdesc_addr.virt_addr = 431 dma_alloc_coherent(ena_dev->dmadev, size, 432 &io_cq->cdesc_addr.phys_addr, 433 GFP_KERNEL); 434 } 435 436 if (!io_cq->cdesc_addr.virt_addr) { 437 netdev_err(ena_dev->net_device, "Memory allocation failed\n"); 438 return -ENOMEM; 439 } 440 441 io_cq->phase = 1; 442 io_cq->head = 0; 443 444 return 0; 445 } 446 447 static void ena_com_handle_single_admin_completion(struct ena_com_admin_queue *admin_queue, 448 struct ena_admin_acq_entry *cqe) 449 { 450 struct ena_comp_ctx *comp_ctx; 451 u16 cmd_id; 452 453 cmd_id = cqe->acq_common_descriptor.command & 454 ENA_ADMIN_ACQ_COMMON_DESC_COMMAND_ID_MASK; 455 456 comp_ctx = get_comp_ctxt(admin_queue, cmd_id, false); 457 if (unlikely(!comp_ctx)) { 458 netdev_err(admin_queue->ena_dev->net_device, 459 "comp_ctx is NULL. Changing the admin queue running state\n"); 460 admin_queue->running_state = false; 461 return; 462 } 463 464 comp_ctx->status = ENA_CMD_COMPLETED; 465 comp_ctx->comp_status = cqe->acq_common_descriptor.status; 466 467 if (comp_ctx->user_cqe) 468 memcpy(comp_ctx->user_cqe, (void *)cqe, comp_ctx->comp_size); 469 470 if (!admin_queue->polling) 471 complete(&comp_ctx->wait_event); 472 } 473 474 static void ena_com_handle_admin_completion(struct ena_com_admin_queue *admin_queue) 475 { 476 struct ena_admin_acq_entry *cqe = NULL; 477 u16 comp_num = 0; 478 u16 head_masked; 479 u8 phase; 480 481 head_masked = admin_queue->cq.head & (admin_queue->q_depth - 1); 482 phase = admin_queue->cq.phase; 483 484 cqe = &admin_queue->cq.entries[head_masked]; 485 486 /* Go over all the completions */ 487 while ((READ_ONCE(cqe->acq_common_descriptor.flags) & 488 ENA_ADMIN_ACQ_COMMON_DESC_PHASE_MASK) == phase) { 489 /* Do not read the rest of the completion entry before the 490 * phase bit was validated 491 */ 492 dma_rmb(); 493 ena_com_handle_single_admin_completion(admin_queue, cqe); 494 495 head_masked++; 496 comp_num++; 497 if (unlikely(head_masked == admin_queue->q_depth)) { 498 head_masked = 0; 499 phase = !phase; 500 } 501 502 cqe = &admin_queue->cq.entries[head_masked]; 503 } 504 505 admin_queue->cq.head += comp_num; 506 admin_queue->cq.phase = phase; 507 admin_queue->sq.head += comp_num; 508 admin_queue->stats.completed_cmd += comp_num; 509 } 510 511 static int ena_com_comp_status_to_errno(struct ena_com_admin_queue *admin_queue, 512 u8 comp_status) 513 { 514 if (unlikely(comp_status != 0)) 515 netdev_err(admin_queue->ena_dev->net_device, 516 "Admin command failed[%u]\n", comp_status); 517 518 switch (comp_status) { 519 case ENA_ADMIN_SUCCESS: 520 return 0; 521 case ENA_ADMIN_RESOURCE_ALLOCATION_FAILURE: 522 return -ENOMEM; 523 case ENA_ADMIN_UNSUPPORTED_OPCODE: 524 return -EOPNOTSUPP; 525 case ENA_ADMIN_BAD_OPCODE: 526 case ENA_ADMIN_MALFORMED_REQUEST: 527 case ENA_ADMIN_ILLEGAL_PARAMETER: 528 case ENA_ADMIN_UNKNOWN_ERROR: 529 return -EINVAL; 530 case ENA_ADMIN_RESOURCE_BUSY: 531 return -EAGAIN; 532 } 533 534 return -EINVAL; 535 } 536 537 static void ena_delay_exponential_backoff_us(u32 exp, u32 delay_us) 538 { 539 delay_us = max_t(u32, ENA_MIN_ADMIN_POLL_US, delay_us); 540 delay_us = min_t(u32, delay_us * (1U << exp), ENA_MAX_ADMIN_POLL_US); 541 usleep_range(delay_us, 2 * delay_us); 542 } 543 544 static int ena_com_wait_and_process_admin_cq_polling(struct ena_comp_ctx *comp_ctx, 545 struct ena_com_admin_queue *admin_queue) 546 { 547 unsigned long flags = 0; 548 unsigned long timeout; 549 int ret; 550 u32 exp = 0; 551 552 timeout = jiffies + usecs_to_jiffies(admin_queue->completion_timeout); 553 554 while (1) { 555 spin_lock_irqsave(&admin_queue->q_lock, flags); 556 ena_com_handle_admin_completion(admin_queue); 557 spin_unlock_irqrestore(&admin_queue->q_lock, flags); 558 559 if (comp_ctx->status != ENA_CMD_SUBMITTED) 560 break; 561 562 if (time_is_before_jiffies(timeout)) { 563 netdev_err(admin_queue->ena_dev->net_device, 564 "Wait for completion (polling) timeout\n"); 565 /* ENA didn't have any completion */ 566 spin_lock_irqsave(&admin_queue->q_lock, flags); 567 admin_queue->stats.no_completion++; 568 admin_queue->running_state = false; 569 spin_unlock_irqrestore(&admin_queue->q_lock, flags); 570 571 ret = -ETIME; 572 goto err; 573 } 574 575 ena_delay_exponential_backoff_us(exp++, 576 admin_queue->ena_dev->ena_min_poll_delay_us); 577 } 578 579 if (unlikely(comp_ctx->status == ENA_CMD_ABORTED)) { 580 netdev_err(admin_queue->ena_dev->net_device, 581 "Command was aborted\n"); 582 spin_lock_irqsave(&admin_queue->q_lock, flags); 583 admin_queue->stats.aborted_cmd++; 584 spin_unlock_irqrestore(&admin_queue->q_lock, flags); 585 ret = -ENODEV; 586 goto err; 587 } 588 589 WARN(comp_ctx->status != ENA_CMD_COMPLETED, "Invalid comp status %d\n", 590 comp_ctx->status); 591 592 ret = ena_com_comp_status_to_errno(admin_queue, comp_ctx->comp_status); 593 err: 594 comp_ctxt_release(admin_queue, comp_ctx); 595 return ret; 596 } 597 598 /* 599 * Set the LLQ configurations of the firmware 600 * 601 * The driver provides only the enabled feature values to the device, 602 * which in turn, checks if they are supported. 603 */ 604 static int ena_com_set_llq(struct ena_com_dev *ena_dev) 605 { 606 struct ena_com_admin_queue *admin_queue; 607 struct ena_admin_set_feat_cmd cmd; 608 struct ena_admin_set_feat_resp resp; 609 struct ena_com_llq_info *llq_info = &ena_dev->llq_info; 610 int ret; 611 612 memset(&cmd, 0x0, sizeof(cmd)); 613 admin_queue = &ena_dev->admin_queue; 614 615 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE; 616 cmd.feat_common.feature_id = ENA_ADMIN_LLQ; 617 618 cmd.u.llq.header_location_ctrl_enabled = llq_info->header_location_ctrl; 619 cmd.u.llq.entry_size_ctrl_enabled = llq_info->desc_list_entry_size_ctrl; 620 cmd.u.llq.desc_num_before_header_enabled = llq_info->descs_num_before_header; 621 cmd.u.llq.descriptors_stride_ctrl_enabled = llq_info->desc_stride_ctrl; 622 623 cmd.u.llq.accel_mode.u.set.enabled_flags = 624 BIT(ENA_ADMIN_DISABLE_META_CACHING) | 625 BIT(ENA_ADMIN_LIMIT_TX_BURST); 626 627 ret = ena_com_execute_admin_command(admin_queue, 628 (struct ena_admin_aq_entry *)&cmd, 629 sizeof(cmd), 630 (struct ena_admin_acq_entry *)&resp, 631 sizeof(resp)); 632 633 if (unlikely(ret)) 634 netdev_err(ena_dev->net_device, 635 "Failed to set LLQ configurations: %d\n", ret); 636 637 return ret; 638 } 639 640 static int ena_com_config_llq_info(struct ena_com_dev *ena_dev, 641 struct ena_admin_feature_llq_desc *llq_features, 642 struct ena_llq_configurations *llq_default_cfg) 643 { 644 struct ena_com_llq_info *llq_info = &ena_dev->llq_info; 645 struct ena_admin_accel_mode_get llq_accel_mode_get; 646 u16 supported_feat; 647 int rc; 648 649 memset(llq_info, 0, sizeof(*llq_info)); 650 651 supported_feat = llq_features->header_location_ctrl_supported; 652 653 if (likely(supported_feat & llq_default_cfg->llq_header_location)) { 654 llq_info->header_location_ctrl = 655 llq_default_cfg->llq_header_location; 656 } else { 657 netdev_err(ena_dev->net_device, 658 "Invalid header location control, supported: 0x%x\n", 659 supported_feat); 660 return -EINVAL; 661 } 662 663 if (likely(llq_info->header_location_ctrl == ENA_ADMIN_INLINE_HEADER)) { 664 supported_feat = llq_features->descriptors_stride_ctrl_supported; 665 if (likely(supported_feat & llq_default_cfg->llq_stride_ctrl)) { 666 llq_info->desc_stride_ctrl = llq_default_cfg->llq_stride_ctrl; 667 } else { 668 if (supported_feat & ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY) { 669 llq_info->desc_stride_ctrl = ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY; 670 } else if (supported_feat & ENA_ADMIN_SINGLE_DESC_PER_ENTRY) { 671 llq_info->desc_stride_ctrl = ENA_ADMIN_SINGLE_DESC_PER_ENTRY; 672 } else { 673 netdev_err(ena_dev->net_device, 674 "Invalid desc_stride_ctrl, supported: 0x%x\n", 675 supported_feat); 676 return -EINVAL; 677 } 678 679 netdev_err(ena_dev->net_device, 680 "Default llq stride ctrl is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n", 681 llq_default_cfg->llq_stride_ctrl, 682 supported_feat, llq_info->desc_stride_ctrl); 683 } 684 } else { 685 llq_info->desc_stride_ctrl = 0; 686 } 687 688 supported_feat = llq_features->entry_size_ctrl_supported; 689 if (likely(supported_feat & llq_default_cfg->llq_ring_entry_size)) { 690 llq_info->desc_list_entry_size_ctrl = llq_default_cfg->llq_ring_entry_size; 691 llq_info->desc_list_entry_size = llq_default_cfg->llq_ring_entry_size_value; 692 } else { 693 if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_128B) { 694 llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_128B; 695 llq_info->desc_list_entry_size = 128; 696 } else if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_192B) { 697 llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_192B; 698 llq_info->desc_list_entry_size = 192; 699 } else if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_256B) { 700 llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_256B; 701 llq_info->desc_list_entry_size = 256; 702 } else { 703 netdev_err(ena_dev->net_device, 704 "Invalid entry_size_ctrl, supported: 0x%x\n", 705 supported_feat); 706 return -EINVAL; 707 } 708 709 netdev_err(ena_dev->net_device, 710 "Default llq ring entry size is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n", 711 llq_default_cfg->llq_ring_entry_size, supported_feat, 712 llq_info->desc_list_entry_size); 713 } 714 if (unlikely(llq_info->desc_list_entry_size & 0x7)) { 715 /* The desc list entry size should be whole multiply of 8 716 * This requirement comes from __iowrite64_copy() 717 */ 718 netdev_err(ena_dev->net_device, "Illegal entry size %d\n", 719 llq_info->desc_list_entry_size); 720 return -EINVAL; 721 } 722 723 if (llq_info->desc_stride_ctrl == ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY) 724 llq_info->descs_per_entry = llq_info->desc_list_entry_size / 725 sizeof(struct ena_eth_io_tx_desc); 726 else 727 llq_info->descs_per_entry = 1; 728 729 supported_feat = llq_features->desc_num_before_header_supported; 730 if (likely(supported_feat & llq_default_cfg->llq_num_decs_before_header)) { 731 llq_info->descs_num_before_header = llq_default_cfg->llq_num_decs_before_header; 732 } else { 733 if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2) { 734 llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2; 735 } else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_1) { 736 llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_1; 737 } else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_4) { 738 llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_4; 739 } else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_8) { 740 llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_8; 741 } else { 742 netdev_err(ena_dev->net_device, 743 "Invalid descs_num_before_header, supported: 0x%x\n", 744 supported_feat); 745 return -EINVAL; 746 } 747 748 netdev_err(ena_dev->net_device, 749 "Default llq num descs before header is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n", 750 llq_default_cfg->llq_num_decs_before_header, 751 supported_feat, llq_info->descs_num_before_header); 752 } 753 /* Check for accelerated queue supported */ 754 llq_accel_mode_get = llq_features->accel_mode.u.get; 755 756 llq_info->disable_meta_caching = 757 !!(llq_accel_mode_get.supported_flags & 758 BIT(ENA_ADMIN_DISABLE_META_CACHING)); 759 760 if (llq_accel_mode_get.supported_flags & BIT(ENA_ADMIN_LIMIT_TX_BURST)) 761 llq_info->max_entries_in_tx_burst = 762 llq_accel_mode_get.max_tx_burst_size / 763 llq_default_cfg->llq_ring_entry_size_value; 764 765 rc = ena_com_set_llq(ena_dev); 766 if (rc) 767 netdev_err(ena_dev->net_device, 768 "Cannot set LLQ configuration: %d\n", rc); 769 770 return rc; 771 } 772 773 static int ena_com_wait_and_process_admin_cq_interrupts(struct ena_comp_ctx *comp_ctx, 774 struct ena_com_admin_queue *admin_queue) 775 { 776 unsigned long flags = 0; 777 int ret; 778 779 wait_for_completion_timeout(&comp_ctx->wait_event, 780 usecs_to_jiffies( 781 admin_queue->completion_timeout)); 782 783 /* In case the command wasn't completed find out the root cause. 784 * There might be 2 kinds of errors 785 * 1) No completion (timeout reached) 786 * 2) There is completion but the device didn't get any msi-x interrupt. 787 */ 788 if (unlikely(comp_ctx->status == ENA_CMD_SUBMITTED)) { 789 spin_lock_irqsave(&admin_queue->q_lock, flags); 790 ena_com_handle_admin_completion(admin_queue); 791 admin_queue->stats.no_completion++; 792 spin_unlock_irqrestore(&admin_queue->q_lock, flags); 793 794 if (comp_ctx->status == ENA_CMD_COMPLETED) { 795 netdev_err(admin_queue->ena_dev->net_device, 796 "The ena device sent a completion but the driver didn't receive a MSI-X interrupt (cmd %d), autopolling mode is %s\n", 797 comp_ctx->cmd_opcode, 798 admin_queue->auto_polling ? "ON" : "OFF"); 799 /* Check if fallback to polling is enabled */ 800 if (admin_queue->auto_polling) 801 admin_queue->polling = true; 802 } else { 803 netdev_err(admin_queue->ena_dev->net_device, 804 "The ena device didn't send a completion for the admin cmd %d status %d\n", 805 comp_ctx->cmd_opcode, comp_ctx->status); 806 } 807 /* Check if shifted to polling mode. 808 * This will happen if there is a completion without an interrupt 809 * and autopolling mode is enabled. Continuing normal execution in such case 810 */ 811 if (!admin_queue->polling) { 812 admin_queue->running_state = false; 813 ret = -ETIME; 814 goto err; 815 } 816 } 817 818 ret = ena_com_comp_status_to_errno(admin_queue, comp_ctx->comp_status); 819 err: 820 comp_ctxt_release(admin_queue, comp_ctx); 821 return ret; 822 } 823 824 /* This method read the hardware device register through posting writes 825 * and waiting for response 826 * On timeout the function will return ENA_MMIO_READ_TIMEOUT 827 */ 828 static u32 ena_com_reg_bar_read32(struct ena_com_dev *ena_dev, u16 offset) 829 { 830 struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read; 831 volatile struct ena_admin_ena_mmio_req_read_less_resp *read_resp = 832 mmio_read->read_resp; 833 u32 mmio_read_reg, ret, i; 834 unsigned long flags = 0; 835 u32 timeout = mmio_read->reg_read_to; 836 837 might_sleep(); 838 839 if (timeout == 0) 840 timeout = ENA_REG_READ_TIMEOUT; 841 842 /* If readless is disabled, perform regular read */ 843 if (!mmio_read->readless_supported) 844 return readl(ena_dev->reg_bar + offset); 845 846 spin_lock_irqsave(&mmio_read->lock, flags); 847 mmio_read->seq_num++; 848 849 read_resp->req_id = mmio_read->seq_num + 0xDEAD; 850 mmio_read_reg = (offset << ENA_REGS_MMIO_REG_READ_REG_OFF_SHIFT) & 851 ENA_REGS_MMIO_REG_READ_REG_OFF_MASK; 852 mmio_read_reg |= mmio_read->seq_num & 853 ENA_REGS_MMIO_REG_READ_REQ_ID_MASK; 854 855 writel(mmio_read_reg, ena_dev->reg_bar + ENA_REGS_MMIO_REG_READ_OFF); 856 857 for (i = 0; i < timeout; i++) { 858 if (READ_ONCE(read_resp->req_id) == mmio_read->seq_num) 859 break; 860 861 udelay(1); 862 } 863 864 if (unlikely(i == timeout)) { 865 netdev_err(ena_dev->net_device, 866 "Reading reg failed for timeout. expected: req id[%u] offset[%u] actual: req id[%u] offset[%u]\n", 867 mmio_read->seq_num, offset, read_resp->req_id, 868 read_resp->reg_off); 869 ret = ENA_MMIO_READ_TIMEOUT; 870 goto err; 871 } 872 873 if (read_resp->reg_off != offset) { 874 netdev_err(ena_dev->net_device, 875 "Read failure: wrong offset provided\n"); 876 ret = ENA_MMIO_READ_TIMEOUT; 877 } else { 878 ret = read_resp->reg_val; 879 } 880 err: 881 spin_unlock_irqrestore(&mmio_read->lock, flags); 882 883 return ret; 884 } 885 886 /* There are two types to wait for completion. 887 * Polling mode - wait until the completion is available. 888 * Async mode - wait on wait queue until the completion is ready 889 * (or the timeout expired). 890 * It is expected that the IRQ called ena_com_handle_admin_completion 891 * to mark the completions. 892 */ 893 static int ena_com_wait_and_process_admin_cq(struct ena_comp_ctx *comp_ctx, 894 struct ena_com_admin_queue *admin_queue) 895 { 896 if (admin_queue->polling) 897 return ena_com_wait_and_process_admin_cq_polling(comp_ctx, 898 admin_queue); 899 900 return ena_com_wait_and_process_admin_cq_interrupts(comp_ctx, 901 admin_queue); 902 } 903 904 static int ena_com_destroy_io_sq(struct ena_com_dev *ena_dev, 905 struct ena_com_io_sq *io_sq) 906 { 907 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue; 908 struct ena_admin_aq_destroy_sq_cmd destroy_cmd; 909 struct ena_admin_acq_destroy_sq_resp_desc destroy_resp; 910 u8 direction; 911 int ret; 912 913 memset(&destroy_cmd, 0x0, sizeof(destroy_cmd)); 914 915 if (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX) 916 direction = ENA_ADMIN_SQ_DIRECTION_TX; 917 else 918 direction = ENA_ADMIN_SQ_DIRECTION_RX; 919 920 destroy_cmd.sq.sq_identity |= (direction << 921 ENA_ADMIN_SQ_SQ_DIRECTION_SHIFT) & 922 ENA_ADMIN_SQ_SQ_DIRECTION_MASK; 923 924 destroy_cmd.sq.sq_idx = io_sq->idx; 925 destroy_cmd.aq_common_descriptor.opcode = ENA_ADMIN_DESTROY_SQ; 926 927 ret = ena_com_execute_admin_command(admin_queue, 928 (struct ena_admin_aq_entry *)&destroy_cmd, 929 sizeof(destroy_cmd), 930 (struct ena_admin_acq_entry *)&destroy_resp, 931 sizeof(destroy_resp)); 932 933 if (unlikely(ret && (ret != -ENODEV))) 934 netdev_err(ena_dev->net_device, 935 "Failed to destroy io sq error: %d\n", ret); 936 937 return ret; 938 } 939 940 static void ena_com_io_queue_free(struct ena_com_dev *ena_dev, 941 struct ena_com_io_sq *io_sq, 942 struct ena_com_io_cq *io_cq) 943 { 944 size_t size; 945 946 if (io_cq->cdesc_addr.virt_addr) { 947 size = io_cq->cdesc_entry_size_in_bytes * io_cq->q_depth; 948 949 dma_free_coherent(ena_dev->dmadev, size, 950 io_cq->cdesc_addr.virt_addr, 951 io_cq->cdesc_addr.phys_addr); 952 953 io_cq->cdesc_addr.virt_addr = NULL; 954 } 955 956 if (io_sq->desc_addr.virt_addr) { 957 size = io_sq->desc_entry_size * io_sq->q_depth; 958 959 dma_free_coherent(ena_dev->dmadev, size, 960 io_sq->desc_addr.virt_addr, 961 io_sq->desc_addr.phys_addr); 962 963 io_sq->desc_addr.virt_addr = NULL; 964 } 965 966 if (io_sq->bounce_buf_ctrl.base_buffer) { 967 devm_kfree(ena_dev->dmadev, io_sq->bounce_buf_ctrl.base_buffer); 968 io_sq->bounce_buf_ctrl.base_buffer = NULL; 969 } 970 } 971 972 static int wait_for_reset_state(struct ena_com_dev *ena_dev, u32 timeout, 973 u16 exp_state) 974 { 975 u32 val, exp = 0; 976 unsigned long timeout_stamp; 977 978 /* Convert timeout from resolution of 100ms to us resolution. */ 979 timeout_stamp = jiffies + usecs_to_jiffies(100 * 1000 * timeout); 980 981 while (1) { 982 val = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF); 983 984 if (unlikely(val == ENA_MMIO_READ_TIMEOUT)) { 985 netdev_err(ena_dev->net_device, 986 "Reg read timeout occurred\n"); 987 return -ETIME; 988 } 989 990 if ((val & ENA_REGS_DEV_STS_RESET_IN_PROGRESS_MASK) == 991 exp_state) 992 return 0; 993 994 if (time_is_before_jiffies(timeout_stamp)) 995 return -ETIME; 996 997 ena_delay_exponential_backoff_us(exp++, ena_dev->ena_min_poll_delay_us); 998 } 999 } 1000 1001 static bool ena_com_check_supported_feature_id(struct ena_com_dev *ena_dev, 1002 enum ena_admin_aq_feature_id feature_id) 1003 { 1004 u32 feature_mask = 1 << feature_id; 1005 1006 /* Device attributes is always supported */ 1007 if ((feature_id != ENA_ADMIN_DEVICE_ATTRIBUTES) && 1008 !(ena_dev->supported_features & feature_mask)) 1009 return false; 1010 1011 return true; 1012 } 1013 1014 static int ena_com_get_feature_ex(struct ena_com_dev *ena_dev, 1015 struct ena_admin_get_feat_resp *get_resp, 1016 enum ena_admin_aq_feature_id feature_id, 1017 dma_addr_t control_buf_dma_addr, 1018 u32 control_buff_size, 1019 u8 feature_ver) 1020 { 1021 struct ena_com_admin_queue *admin_queue; 1022 struct ena_admin_get_feat_cmd get_cmd; 1023 int ret; 1024 1025 if (!ena_com_check_supported_feature_id(ena_dev, feature_id)) { 1026 netdev_dbg(ena_dev->net_device, "Feature %d isn't supported\n", 1027 feature_id); 1028 return -EOPNOTSUPP; 1029 } 1030 1031 memset(&get_cmd, 0x0, sizeof(get_cmd)); 1032 admin_queue = &ena_dev->admin_queue; 1033 1034 get_cmd.aq_common_descriptor.opcode = ENA_ADMIN_GET_FEATURE; 1035 1036 if (control_buff_size) 1037 get_cmd.aq_common_descriptor.flags = 1038 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK; 1039 else 1040 get_cmd.aq_common_descriptor.flags = 0; 1041 1042 ret = ena_com_mem_addr_set(ena_dev, 1043 &get_cmd.control_buffer.address, 1044 control_buf_dma_addr); 1045 if (unlikely(ret)) { 1046 netdev_err(ena_dev->net_device, "Memory address set failed\n"); 1047 return ret; 1048 } 1049 1050 get_cmd.control_buffer.length = control_buff_size; 1051 get_cmd.feat_common.feature_version = feature_ver; 1052 get_cmd.feat_common.feature_id = feature_id; 1053 1054 ret = ena_com_execute_admin_command(admin_queue, 1055 (struct ena_admin_aq_entry *) 1056 &get_cmd, 1057 sizeof(get_cmd), 1058 (struct ena_admin_acq_entry *) 1059 get_resp, 1060 sizeof(*get_resp)); 1061 1062 if (unlikely(ret)) 1063 netdev_err(ena_dev->net_device, 1064 "Failed to submit get_feature command %d error: %d\n", 1065 feature_id, ret); 1066 1067 return ret; 1068 } 1069 1070 static int ena_com_get_feature(struct ena_com_dev *ena_dev, 1071 struct ena_admin_get_feat_resp *get_resp, 1072 enum ena_admin_aq_feature_id feature_id, 1073 u8 feature_ver) 1074 { 1075 return ena_com_get_feature_ex(ena_dev, 1076 get_resp, 1077 feature_id, 1078 0, 1079 0, 1080 feature_ver); 1081 } 1082 1083 int ena_com_get_current_hash_function(struct ena_com_dev *ena_dev) 1084 { 1085 return ena_dev->rss.hash_func; 1086 } 1087 1088 static void ena_com_hash_key_fill_default_key(struct ena_com_dev *ena_dev) 1089 { 1090 struct ena_admin_feature_rss_flow_hash_control *hash_key = 1091 (ena_dev->rss).hash_key; 1092 1093 netdev_rss_key_fill(&hash_key->key, sizeof(hash_key->key)); 1094 /* The key buffer is stored in the device in an array of 1095 * uint32 elements. 1096 */ 1097 hash_key->key_parts = ENA_ADMIN_RSS_KEY_PARTS; 1098 } 1099 1100 static int ena_com_hash_key_allocate(struct ena_com_dev *ena_dev) 1101 { 1102 struct ena_rss *rss = &ena_dev->rss; 1103 1104 if (!ena_com_check_supported_feature_id(ena_dev, 1105 ENA_ADMIN_RSS_HASH_FUNCTION)) 1106 return -EOPNOTSUPP; 1107 1108 rss->hash_key = 1109 dma_alloc_coherent(ena_dev->dmadev, sizeof(*rss->hash_key), 1110 &rss->hash_key_dma_addr, GFP_KERNEL); 1111 1112 if (unlikely(!rss->hash_key)) 1113 return -ENOMEM; 1114 1115 return 0; 1116 } 1117 1118 static void ena_com_hash_key_destroy(struct ena_com_dev *ena_dev) 1119 { 1120 struct ena_rss *rss = &ena_dev->rss; 1121 1122 if (rss->hash_key) 1123 dma_free_coherent(ena_dev->dmadev, sizeof(*rss->hash_key), 1124 rss->hash_key, rss->hash_key_dma_addr); 1125 rss->hash_key = NULL; 1126 } 1127 1128 static int ena_com_hash_ctrl_init(struct ena_com_dev *ena_dev) 1129 { 1130 struct ena_rss *rss = &ena_dev->rss; 1131 1132 rss->hash_ctrl = 1133 dma_alloc_coherent(ena_dev->dmadev, sizeof(*rss->hash_ctrl), 1134 &rss->hash_ctrl_dma_addr, GFP_KERNEL); 1135 1136 if (unlikely(!rss->hash_ctrl)) 1137 return -ENOMEM; 1138 1139 return 0; 1140 } 1141 1142 static void ena_com_hash_ctrl_destroy(struct ena_com_dev *ena_dev) 1143 { 1144 struct ena_rss *rss = &ena_dev->rss; 1145 1146 if (rss->hash_ctrl) 1147 dma_free_coherent(ena_dev->dmadev, sizeof(*rss->hash_ctrl), 1148 rss->hash_ctrl, rss->hash_ctrl_dma_addr); 1149 rss->hash_ctrl = NULL; 1150 } 1151 1152 static int ena_com_indirect_table_allocate(struct ena_com_dev *ena_dev, 1153 u16 log_size) 1154 { 1155 struct ena_rss *rss = &ena_dev->rss; 1156 struct ena_admin_get_feat_resp get_resp; 1157 size_t tbl_size; 1158 int ret; 1159 1160 ret = ena_com_get_feature(ena_dev, &get_resp, 1161 ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG, 0); 1162 if (unlikely(ret)) 1163 return ret; 1164 1165 if ((get_resp.u.ind_table.min_size > log_size) || 1166 (get_resp.u.ind_table.max_size < log_size)) { 1167 netdev_err(ena_dev->net_device, 1168 "Indirect table size doesn't fit. requested size: %d while min is:%d and max %d\n", 1169 1 << log_size, 1 << get_resp.u.ind_table.min_size, 1170 1 << get_resp.u.ind_table.max_size); 1171 return -EINVAL; 1172 } 1173 1174 tbl_size = (1ULL << log_size) * 1175 sizeof(struct ena_admin_rss_ind_table_entry); 1176 1177 rss->rss_ind_tbl = 1178 dma_alloc_coherent(ena_dev->dmadev, tbl_size, 1179 &rss->rss_ind_tbl_dma_addr, GFP_KERNEL); 1180 if (unlikely(!rss->rss_ind_tbl)) 1181 goto mem_err1; 1182 1183 tbl_size = (1ULL << log_size) * sizeof(u16); 1184 rss->host_rss_ind_tbl = 1185 devm_kzalloc(ena_dev->dmadev, tbl_size, GFP_KERNEL); 1186 if (unlikely(!rss->host_rss_ind_tbl)) 1187 goto mem_err2; 1188 1189 rss->tbl_log_size = log_size; 1190 1191 return 0; 1192 1193 mem_err2: 1194 tbl_size = (1ULL << log_size) * 1195 sizeof(struct ena_admin_rss_ind_table_entry); 1196 1197 dma_free_coherent(ena_dev->dmadev, tbl_size, rss->rss_ind_tbl, 1198 rss->rss_ind_tbl_dma_addr); 1199 rss->rss_ind_tbl = NULL; 1200 mem_err1: 1201 rss->tbl_log_size = 0; 1202 return -ENOMEM; 1203 } 1204 1205 static void ena_com_indirect_table_destroy(struct ena_com_dev *ena_dev) 1206 { 1207 struct ena_rss *rss = &ena_dev->rss; 1208 size_t tbl_size = (1ULL << rss->tbl_log_size) * 1209 sizeof(struct ena_admin_rss_ind_table_entry); 1210 1211 if (rss->rss_ind_tbl) 1212 dma_free_coherent(ena_dev->dmadev, tbl_size, rss->rss_ind_tbl, 1213 rss->rss_ind_tbl_dma_addr); 1214 rss->rss_ind_tbl = NULL; 1215 1216 if (rss->host_rss_ind_tbl) 1217 devm_kfree(ena_dev->dmadev, rss->host_rss_ind_tbl); 1218 rss->host_rss_ind_tbl = NULL; 1219 } 1220 1221 static int ena_com_create_io_sq(struct ena_com_dev *ena_dev, 1222 struct ena_com_io_sq *io_sq, u16 cq_idx) 1223 { 1224 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue; 1225 struct ena_admin_aq_create_sq_cmd create_cmd; 1226 struct ena_admin_acq_create_sq_resp_desc cmd_completion; 1227 u8 direction; 1228 int ret; 1229 1230 memset(&create_cmd, 0x0, sizeof(create_cmd)); 1231 1232 create_cmd.aq_common_descriptor.opcode = ENA_ADMIN_CREATE_SQ; 1233 1234 if (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX) 1235 direction = ENA_ADMIN_SQ_DIRECTION_TX; 1236 else 1237 direction = ENA_ADMIN_SQ_DIRECTION_RX; 1238 1239 create_cmd.sq_identity |= (direction << 1240 ENA_ADMIN_AQ_CREATE_SQ_CMD_SQ_DIRECTION_SHIFT) & 1241 ENA_ADMIN_AQ_CREATE_SQ_CMD_SQ_DIRECTION_MASK; 1242 1243 create_cmd.sq_caps_2 |= io_sq->mem_queue_type & 1244 ENA_ADMIN_AQ_CREATE_SQ_CMD_PLACEMENT_POLICY_MASK; 1245 1246 create_cmd.sq_caps_2 |= (ENA_ADMIN_COMPLETION_POLICY_DESC << 1247 ENA_ADMIN_AQ_CREATE_SQ_CMD_COMPLETION_POLICY_SHIFT) & 1248 ENA_ADMIN_AQ_CREATE_SQ_CMD_COMPLETION_POLICY_MASK; 1249 1250 create_cmd.sq_caps_3 |= 1251 ENA_ADMIN_AQ_CREATE_SQ_CMD_IS_PHYSICALLY_CONTIGUOUS_MASK; 1252 1253 create_cmd.cq_idx = cq_idx; 1254 create_cmd.sq_depth = io_sq->q_depth; 1255 1256 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST) { 1257 ret = ena_com_mem_addr_set(ena_dev, 1258 &create_cmd.sq_ba, 1259 io_sq->desc_addr.phys_addr); 1260 if (unlikely(ret)) { 1261 netdev_err(ena_dev->net_device, 1262 "Memory address set failed\n"); 1263 return ret; 1264 } 1265 } 1266 1267 ret = ena_com_execute_admin_command(admin_queue, 1268 (struct ena_admin_aq_entry *)&create_cmd, 1269 sizeof(create_cmd), 1270 (struct ena_admin_acq_entry *)&cmd_completion, 1271 sizeof(cmd_completion)); 1272 if (unlikely(ret)) { 1273 netdev_err(ena_dev->net_device, 1274 "Failed to create IO SQ. error: %d\n", ret); 1275 return ret; 1276 } 1277 1278 io_sq->idx = cmd_completion.sq_idx; 1279 1280 io_sq->db_addr = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar + 1281 (uintptr_t)cmd_completion.sq_doorbell_offset); 1282 1283 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) { 1284 io_sq->header_addr = (u8 __iomem *)((uintptr_t)ena_dev->mem_bar 1285 + cmd_completion.llq_headers_offset); 1286 1287 io_sq->desc_addr.pbuf_dev_addr = 1288 (u8 __iomem *)((uintptr_t)ena_dev->mem_bar + 1289 cmd_completion.llq_descriptors_offset); 1290 } 1291 1292 netdev_dbg(ena_dev->net_device, "Created sq[%u], depth[%u]\n", 1293 io_sq->idx, io_sq->q_depth); 1294 1295 return ret; 1296 } 1297 1298 static int ena_com_ind_tbl_convert_to_device(struct ena_com_dev *ena_dev) 1299 { 1300 struct ena_rss *rss = &ena_dev->rss; 1301 struct ena_com_io_sq *io_sq; 1302 u16 qid; 1303 int i; 1304 1305 for (i = 0; i < 1 << rss->tbl_log_size; i++) { 1306 qid = rss->host_rss_ind_tbl[i]; 1307 if (qid >= ENA_TOTAL_NUM_QUEUES) 1308 return -EINVAL; 1309 1310 io_sq = &ena_dev->io_sq_queues[qid]; 1311 1312 if (io_sq->direction != ENA_COM_IO_QUEUE_DIRECTION_RX) 1313 return -EINVAL; 1314 1315 rss->rss_ind_tbl[i].cq_idx = io_sq->idx; 1316 } 1317 1318 return 0; 1319 } 1320 1321 static void ena_com_update_intr_delay_resolution(struct ena_com_dev *ena_dev, 1322 u16 intr_delay_resolution) 1323 { 1324 u16 prev_intr_delay_resolution = ena_dev->intr_delay_resolution; 1325 1326 if (unlikely(!intr_delay_resolution)) { 1327 netdev_err(ena_dev->net_device, 1328 "Illegal intr_delay_resolution provided. Going to use default 1 usec resolution\n"); 1329 intr_delay_resolution = ENA_DEFAULT_INTR_DELAY_RESOLUTION; 1330 } 1331 1332 /* update Rx */ 1333 ena_dev->intr_moder_rx_interval = 1334 ena_dev->intr_moder_rx_interval * 1335 prev_intr_delay_resolution / 1336 intr_delay_resolution; 1337 1338 /* update Tx */ 1339 ena_dev->intr_moder_tx_interval = 1340 ena_dev->intr_moder_tx_interval * 1341 prev_intr_delay_resolution / 1342 intr_delay_resolution; 1343 1344 ena_dev->intr_delay_resolution = intr_delay_resolution; 1345 } 1346 1347 /*****************************************************************************/ 1348 /******************************* API ******************************/ 1349 /*****************************************************************************/ 1350 1351 int ena_com_execute_admin_command(struct ena_com_admin_queue *admin_queue, 1352 struct ena_admin_aq_entry *cmd, 1353 size_t cmd_size, 1354 struct ena_admin_acq_entry *comp, 1355 size_t comp_size) 1356 { 1357 struct ena_comp_ctx *comp_ctx; 1358 int ret; 1359 1360 comp_ctx = ena_com_submit_admin_cmd(admin_queue, cmd, cmd_size, 1361 comp, comp_size); 1362 if (IS_ERR(comp_ctx)) { 1363 ret = PTR_ERR(comp_ctx); 1364 if (ret == -ENODEV) 1365 netdev_dbg(admin_queue->ena_dev->net_device, 1366 "Failed to submit command [%d]\n", ret); 1367 else 1368 netdev_err(admin_queue->ena_dev->net_device, 1369 "Failed to submit command [%d]\n", ret); 1370 1371 return ret; 1372 } 1373 1374 ret = ena_com_wait_and_process_admin_cq(comp_ctx, admin_queue); 1375 if (unlikely(ret)) { 1376 if (admin_queue->running_state) 1377 netdev_err(admin_queue->ena_dev->net_device, 1378 "Failed to process command. ret = %d\n", ret); 1379 else 1380 netdev_dbg(admin_queue->ena_dev->net_device, 1381 "Failed to process command. ret = %d\n", ret); 1382 } 1383 return ret; 1384 } 1385 1386 int ena_com_create_io_cq(struct ena_com_dev *ena_dev, 1387 struct ena_com_io_cq *io_cq) 1388 { 1389 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue; 1390 struct ena_admin_aq_create_cq_cmd create_cmd; 1391 struct ena_admin_acq_create_cq_resp_desc cmd_completion; 1392 int ret; 1393 1394 memset(&create_cmd, 0x0, sizeof(create_cmd)); 1395 1396 create_cmd.aq_common_descriptor.opcode = ENA_ADMIN_CREATE_CQ; 1397 1398 create_cmd.cq_caps_2 |= (io_cq->cdesc_entry_size_in_bytes / 4) & 1399 ENA_ADMIN_AQ_CREATE_CQ_CMD_CQ_ENTRY_SIZE_WORDS_MASK; 1400 create_cmd.cq_caps_1 |= 1401 ENA_ADMIN_AQ_CREATE_CQ_CMD_INTERRUPT_MODE_ENABLED_MASK; 1402 1403 create_cmd.msix_vector = io_cq->msix_vector; 1404 create_cmd.cq_depth = io_cq->q_depth; 1405 1406 ret = ena_com_mem_addr_set(ena_dev, 1407 &create_cmd.cq_ba, 1408 io_cq->cdesc_addr.phys_addr); 1409 if (unlikely(ret)) { 1410 netdev_err(ena_dev->net_device, "Memory address set failed\n"); 1411 return ret; 1412 } 1413 1414 ret = ena_com_execute_admin_command(admin_queue, 1415 (struct ena_admin_aq_entry *)&create_cmd, 1416 sizeof(create_cmd), 1417 (struct ena_admin_acq_entry *)&cmd_completion, 1418 sizeof(cmd_completion)); 1419 if (unlikely(ret)) { 1420 netdev_err(ena_dev->net_device, 1421 "Failed to create IO CQ. error: %d\n", ret); 1422 return ret; 1423 } 1424 1425 io_cq->idx = cmd_completion.cq_idx; 1426 1427 io_cq->unmask_reg = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar + 1428 cmd_completion.cq_interrupt_unmask_register_offset); 1429 1430 if (cmd_completion.cq_head_db_register_offset) 1431 io_cq->cq_head_db_reg = 1432 (u32 __iomem *)((uintptr_t)ena_dev->reg_bar + 1433 cmd_completion.cq_head_db_register_offset); 1434 1435 if (cmd_completion.numa_node_register_offset) 1436 io_cq->numa_node_cfg_reg = 1437 (u32 __iomem *)((uintptr_t)ena_dev->reg_bar + 1438 cmd_completion.numa_node_register_offset); 1439 1440 netdev_dbg(ena_dev->net_device, "Created cq[%u], depth[%u]\n", 1441 io_cq->idx, io_cq->q_depth); 1442 1443 return ret; 1444 } 1445 1446 int ena_com_get_io_handlers(struct ena_com_dev *ena_dev, u16 qid, 1447 struct ena_com_io_sq **io_sq, 1448 struct ena_com_io_cq **io_cq) 1449 { 1450 if (qid >= ENA_TOTAL_NUM_QUEUES) { 1451 netdev_err(ena_dev->net_device, 1452 "Invalid queue number %d but the max is %d\n", qid, 1453 ENA_TOTAL_NUM_QUEUES); 1454 return -EINVAL; 1455 } 1456 1457 *io_sq = &ena_dev->io_sq_queues[qid]; 1458 *io_cq = &ena_dev->io_cq_queues[qid]; 1459 1460 return 0; 1461 } 1462 1463 void ena_com_abort_admin_commands(struct ena_com_dev *ena_dev) 1464 { 1465 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue; 1466 struct ena_comp_ctx *comp_ctx; 1467 u16 i; 1468 1469 if (!admin_queue->comp_ctx) 1470 return; 1471 1472 for (i = 0; i < admin_queue->q_depth; i++) { 1473 comp_ctx = get_comp_ctxt(admin_queue, i, false); 1474 if (unlikely(!comp_ctx)) 1475 break; 1476 1477 comp_ctx->status = ENA_CMD_ABORTED; 1478 1479 complete(&comp_ctx->wait_event); 1480 } 1481 } 1482 1483 void ena_com_wait_for_abort_completion(struct ena_com_dev *ena_dev) 1484 { 1485 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue; 1486 unsigned long flags = 0; 1487 u32 exp = 0; 1488 1489 spin_lock_irqsave(&admin_queue->q_lock, flags); 1490 while (atomic_read(&admin_queue->outstanding_cmds) != 0) { 1491 spin_unlock_irqrestore(&admin_queue->q_lock, flags); 1492 ena_delay_exponential_backoff_us(exp++, 1493 ena_dev->ena_min_poll_delay_us); 1494 spin_lock_irqsave(&admin_queue->q_lock, flags); 1495 } 1496 spin_unlock_irqrestore(&admin_queue->q_lock, flags); 1497 } 1498 1499 int ena_com_destroy_io_cq(struct ena_com_dev *ena_dev, 1500 struct ena_com_io_cq *io_cq) 1501 { 1502 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue; 1503 struct ena_admin_aq_destroy_cq_cmd destroy_cmd; 1504 struct ena_admin_acq_destroy_cq_resp_desc destroy_resp; 1505 int ret; 1506 1507 memset(&destroy_cmd, 0x0, sizeof(destroy_cmd)); 1508 1509 destroy_cmd.cq_idx = io_cq->idx; 1510 destroy_cmd.aq_common_descriptor.opcode = ENA_ADMIN_DESTROY_CQ; 1511 1512 ret = ena_com_execute_admin_command(admin_queue, 1513 (struct ena_admin_aq_entry *)&destroy_cmd, 1514 sizeof(destroy_cmd), 1515 (struct ena_admin_acq_entry *)&destroy_resp, 1516 sizeof(destroy_resp)); 1517 1518 if (unlikely(ret && (ret != -ENODEV))) 1519 netdev_err(ena_dev->net_device, 1520 "Failed to destroy IO CQ. error: %d\n", ret); 1521 1522 return ret; 1523 } 1524 1525 bool ena_com_get_admin_running_state(struct ena_com_dev *ena_dev) 1526 { 1527 return ena_dev->admin_queue.running_state; 1528 } 1529 1530 void ena_com_set_admin_running_state(struct ena_com_dev *ena_dev, bool state) 1531 { 1532 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue; 1533 unsigned long flags = 0; 1534 1535 spin_lock_irqsave(&admin_queue->q_lock, flags); 1536 ena_dev->admin_queue.running_state = state; 1537 spin_unlock_irqrestore(&admin_queue->q_lock, flags); 1538 } 1539 1540 void ena_com_admin_aenq_enable(struct ena_com_dev *ena_dev) 1541 { 1542 u16 depth = ena_dev->aenq.q_depth; 1543 1544 WARN(ena_dev->aenq.head != depth, "Invalid AENQ state\n"); 1545 1546 /* Init head_db to mark that all entries in the queue 1547 * are initially available 1548 */ 1549 writel(depth, ena_dev->reg_bar + ENA_REGS_AENQ_HEAD_DB_OFF); 1550 } 1551 1552 int ena_com_set_aenq_config(struct ena_com_dev *ena_dev, u32 groups_flag) 1553 { 1554 struct ena_com_admin_queue *admin_queue; 1555 struct ena_admin_set_feat_cmd cmd; 1556 struct ena_admin_set_feat_resp resp; 1557 struct ena_admin_get_feat_resp get_resp; 1558 int ret; 1559 1560 ret = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_AENQ_CONFIG, 0); 1561 if (ret) { 1562 dev_info(ena_dev->dmadev, "Can't get aenq configuration\n"); 1563 return ret; 1564 } 1565 1566 if ((get_resp.u.aenq.supported_groups & groups_flag) != groups_flag) { 1567 netdev_warn(ena_dev->net_device, 1568 "Trying to set unsupported aenq events. supported flag: 0x%x asked flag: 0x%x\n", 1569 get_resp.u.aenq.supported_groups, groups_flag); 1570 return -EOPNOTSUPP; 1571 } 1572 1573 memset(&cmd, 0x0, sizeof(cmd)); 1574 admin_queue = &ena_dev->admin_queue; 1575 1576 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE; 1577 cmd.aq_common_descriptor.flags = 0; 1578 cmd.feat_common.feature_id = ENA_ADMIN_AENQ_CONFIG; 1579 cmd.u.aenq.enabled_groups = groups_flag; 1580 1581 ret = ena_com_execute_admin_command(admin_queue, 1582 (struct ena_admin_aq_entry *)&cmd, 1583 sizeof(cmd), 1584 (struct ena_admin_acq_entry *)&resp, 1585 sizeof(resp)); 1586 1587 if (unlikely(ret)) 1588 netdev_err(ena_dev->net_device, 1589 "Failed to config AENQ ret: %d\n", ret); 1590 1591 return ret; 1592 } 1593 1594 int ena_com_get_dma_width(struct ena_com_dev *ena_dev) 1595 { 1596 u32 caps = ena_com_reg_bar_read32(ena_dev, ENA_REGS_CAPS_OFF); 1597 u32 width; 1598 1599 if (unlikely(caps == ENA_MMIO_READ_TIMEOUT)) { 1600 netdev_err(ena_dev->net_device, "Reg read timeout occurred\n"); 1601 return -ETIME; 1602 } 1603 1604 width = (caps & ENA_REGS_CAPS_DMA_ADDR_WIDTH_MASK) >> 1605 ENA_REGS_CAPS_DMA_ADDR_WIDTH_SHIFT; 1606 1607 netdev_dbg(ena_dev->net_device, "ENA dma width: %d\n", width); 1608 1609 if ((width < 32) || width > ENA_MAX_PHYS_ADDR_SIZE_BITS) { 1610 netdev_err(ena_dev->net_device, "DMA width illegal value: %d\n", 1611 width); 1612 return -EINVAL; 1613 } 1614 1615 ena_dev->dma_addr_bits = width; 1616 1617 return width; 1618 } 1619 1620 int ena_com_validate_version(struct ena_com_dev *ena_dev) 1621 { 1622 u32 ver; 1623 u32 ctrl_ver; 1624 u32 ctrl_ver_masked; 1625 1626 /* Make sure the ENA version and the controller version are at least 1627 * as the driver expects 1628 */ 1629 ver = ena_com_reg_bar_read32(ena_dev, ENA_REGS_VERSION_OFF); 1630 ctrl_ver = ena_com_reg_bar_read32(ena_dev, 1631 ENA_REGS_CONTROLLER_VERSION_OFF); 1632 1633 if (unlikely((ver == ENA_MMIO_READ_TIMEOUT) || 1634 (ctrl_ver == ENA_MMIO_READ_TIMEOUT))) { 1635 netdev_err(ena_dev->net_device, "Reg read timeout occurred\n"); 1636 return -ETIME; 1637 } 1638 1639 dev_info(ena_dev->dmadev, "ENA device version: %d.%d\n", 1640 (ver & ENA_REGS_VERSION_MAJOR_VERSION_MASK) >> 1641 ENA_REGS_VERSION_MAJOR_VERSION_SHIFT, 1642 ver & ENA_REGS_VERSION_MINOR_VERSION_MASK); 1643 1644 dev_info(ena_dev->dmadev, 1645 "ENA controller version: %d.%d.%d implementation version %d\n", 1646 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_MASK) >> 1647 ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_SHIFT, 1648 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_MASK) >> 1649 ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_SHIFT, 1650 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_SUBMINOR_VERSION_MASK), 1651 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_IMPL_ID_MASK) >> 1652 ENA_REGS_CONTROLLER_VERSION_IMPL_ID_SHIFT); 1653 1654 ctrl_ver_masked = 1655 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_MASK) | 1656 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_MASK) | 1657 (ctrl_ver & ENA_REGS_CONTROLLER_VERSION_SUBMINOR_VERSION_MASK); 1658 1659 /* Validate the ctrl version without the implementation ID */ 1660 if (ctrl_ver_masked < MIN_ENA_CTRL_VER) { 1661 netdev_err(ena_dev->net_device, 1662 "ENA ctrl version is lower than the minimal ctrl version the driver supports\n"); 1663 return -1; 1664 } 1665 1666 return 0; 1667 } 1668 1669 static void 1670 ena_com_free_ena_admin_queue_comp_ctx(struct ena_com_dev *ena_dev, 1671 struct ena_com_admin_queue *admin_queue) 1672 1673 { 1674 if (!admin_queue->comp_ctx) 1675 return; 1676 1677 devm_kfree(ena_dev->dmadev, admin_queue->comp_ctx); 1678 1679 admin_queue->comp_ctx = NULL; 1680 } 1681 1682 void ena_com_admin_destroy(struct ena_com_dev *ena_dev) 1683 { 1684 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue; 1685 struct ena_com_admin_cq *cq = &admin_queue->cq; 1686 struct ena_com_admin_sq *sq = &admin_queue->sq; 1687 struct ena_com_aenq *aenq = &ena_dev->aenq; 1688 u16 size; 1689 1690 ena_com_free_ena_admin_queue_comp_ctx(ena_dev, admin_queue); 1691 1692 size = ADMIN_SQ_SIZE(admin_queue->q_depth); 1693 if (sq->entries) 1694 dma_free_coherent(ena_dev->dmadev, size, sq->entries, 1695 sq->dma_addr); 1696 sq->entries = NULL; 1697 1698 size = ADMIN_CQ_SIZE(admin_queue->q_depth); 1699 if (cq->entries) 1700 dma_free_coherent(ena_dev->dmadev, size, cq->entries, 1701 cq->dma_addr); 1702 cq->entries = NULL; 1703 1704 size = ADMIN_AENQ_SIZE(aenq->q_depth); 1705 if (ena_dev->aenq.entries) 1706 dma_free_coherent(ena_dev->dmadev, size, aenq->entries, 1707 aenq->dma_addr); 1708 aenq->entries = NULL; 1709 } 1710 1711 void ena_com_set_admin_polling_mode(struct ena_com_dev *ena_dev, bool polling) 1712 { 1713 u32 mask_value = 0; 1714 1715 if (polling) 1716 mask_value = ENA_REGS_ADMIN_INTR_MASK; 1717 1718 writel(mask_value, ena_dev->reg_bar + ENA_REGS_INTR_MASK_OFF); 1719 ena_dev->admin_queue.polling = polling; 1720 } 1721 1722 void ena_com_set_admin_auto_polling_mode(struct ena_com_dev *ena_dev, 1723 bool polling) 1724 { 1725 ena_dev->admin_queue.auto_polling = polling; 1726 } 1727 1728 int ena_com_mmio_reg_read_request_init(struct ena_com_dev *ena_dev) 1729 { 1730 struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read; 1731 1732 spin_lock_init(&mmio_read->lock); 1733 mmio_read->read_resp = 1734 dma_alloc_coherent(ena_dev->dmadev, 1735 sizeof(*mmio_read->read_resp), 1736 &mmio_read->read_resp_dma_addr, GFP_KERNEL); 1737 if (unlikely(!mmio_read->read_resp)) 1738 goto err; 1739 1740 ena_com_mmio_reg_read_request_write_dev_addr(ena_dev); 1741 1742 mmio_read->read_resp->req_id = 0x0; 1743 mmio_read->seq_num = 0x0; 1744 mmio_read->readless_supported = true; 1745 1746 return 0; 1747 1748 err: 1749 1750 return -ENOMEM; 1751 } 1752 1753 void ena_com_set_mmio_read_mode(struct ena_com_dev *ena_dev, bool readless_supported) 1754 { 1755 struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read; 1756 1757 mmio_read->readless_supported = readless_supported; 1758 } 1759 1760 void ena_com_mmio_reg_read_request_destroy(struct ena_com_dev *ena_dev) 1761 { 1762 struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read; 1763 1764 writel(0x0, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_LO_OFF); 1765 writel(0x0, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_HI_OFF); 1766 1767 dma_free_coherent(ena_dev->dmadev, sizeof(*mmio_read->read_resp), 1768 mmio_read->read_resp, mmio_read->read_resp_dma_addr); 1769 1770 mmio_read->read_resp = NULL; 1771 } 1772 1773 void ena_com_mmio_reg_read_request_write_dev_addr(struct ena_com_dev *ena_dev) 1774 { 1775 struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read; 1776 u32 addr_low, addr_high; 1777 1778 addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(mmio_read->read_resp_dma_addr); 1779 addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(mmio_read->read_resp_dma_addr); 1780 1781 writel(addr_low, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_LO_OFF); 1782 writel(addr_high, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_HI_OFF); 1783 } 1784 1785 int ena_com_admin_init(struct ena_com_dev *ena_dev, 1786 struct ena_aenq_handlers *aenq_handlers) 1787 { 1788 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue; 1789 u32 aq_caps, acq_caps, dev_sts, addr_low, addr_high; 1790 int ret; 1791 1792 dev_sts = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF); 1793 1794 if (unlikely(dev_sts == ENA_MMIO_READ_TIMEOUT)) { 1795 netdev_err(ena_dev->net_device, "Reg read timeout occurred\n"); 1796 return -ETIME; 1797 } 1798 1799 if (!(dev_sts & ENA_REGS_DEV_STS_READY_MASK)) { 1800 netdev_err(ena_dev->net_device, 1801 "Device isn't ready, abort com init\n"); 1802 return -ENODEV; 1803 } 1804 1805 admin_queue->q_depth = ENA_ADMIN_QUEUE_DEPTH; 1806 1807 admin_queue->q_dmadev = ena_dev->dmadev; 1808 admin_queue->polling = false; 1809 admin_queue->curr_cmd_id = 0; 1810 1811 atomic_set(&admin_queue->outstanding_cmds, 0); 1812 1813 spin_lock_init(&admin_queue->q_lock); 1814 1815 ret = ena_com_init_comp_ctxt(admin_queue); 1816 if (ret) 1817 goto error; 1818 1819 ret = ena_com_admin_init_sq(admin_queue); 1820 if (ret) 1821 goto error; 1822 1823 ret = ena_com_admin_init_cq(admin_queue); 1824 if (ret) 1825 goto error; 1826 1827 admin_queue->sq.db_addr = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar + 1828 ENA_REGS_AQ_DB_OFF); 1829 1830 addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(admin_queue->sq.dma_addr); 1831 addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(admin_queue->sq.dma_addr); 1832 1833 writel(addr_low, ena_dev->reg_bar + ENA_REGS_AQ_BASE_LO_OFF); 1834 writel(addr_high, ena_dev->reg_bar + ENA_REGS_AQ_BASE_HI_OFF); 1835 1836 addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(admin_queue->cq.dma_addr); 1837 addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(admin_queue->cq.dma_addr); 1838 1839 writel(addr_low, ena_dev->reg_bar + ENA_REGS_ACQ_BASE_LO_OFF); 1840 writel(addr_high, ena_dev->reg_bar + ENA_REGS_ACQ_BASE_HI_OFF); 1841 1842 aq_caps = 0; 1843 aq_caps |= admin_queue->q_depth & ENA_REGS_AQ_CAPS_AQ_DEPTH_MASK; 1844 aq_caps |= (sizeof(struct ena_admin_aq_entry) << 1845 ENA_REGS_AQ_CAPS_AQ_ENTRY_SIZE_SHIFT) & 1846 ENA_REGS_AQ_CAPS_AQ_ENTRY_SIZE_MASK; 1847 1848 acq_caps = 0; 1849 acq_caps |= admin_queue->q_depth & ENA_REGS_ACQ_CAPS_ACQ_DEPTH_MASK; 1850 acq_caps |= (sizeof(struct ena_admin_acq_entry) << 1851 ENA_REGS_ACQ_CAPS_ACQ_ENTRY_SIZE_SHIFT) & 1852 ENA_REGS_ACQ_CAPS_ACQ_ENTRY_SIZE_MASK; 1853 1854 writel(aq_caps, ena_dev->reg_bar + ENA_REGS_AQ_CAPS_OFF); 1855 writel(acq_caps, ena_dev->reg_bar + ENA_REGS_ACQ_CAPS_OFF); 1856 ret = ena_com_admin_init_aenq(ena_dev, aenq_handlers); 1857 if (ret) 1858 goto error; 1859 1860 admin_queue->ena_dev = ena_dev; 1861 admin_queue->running_state = true; 1862 1863 return 0; 1864 error: 1865 ena_com_admin_destroy(ena_dev); 1866 1867 return ret; 1868 } 1869 1870 int ena_com_create_io_queue(struct ena_com_dev *ena_dev, 1871 struct ena_com_create_io_ctx *ctx) 1872 { 1873 struct ena_com_io_sq *io_sq; 1874 struct ena_com_io_cq *io_cq; 1875 int ret; 1876 1877 if (ctx->qid >= ENA_TOTAL_NUM_QUEUES) { 1878 netdev_err(ena_dev->net_device, 1879 "Qid (%d) is bigger than max num of queues (%d)\n", 1880 ctx->qid, ENA_TOTAL_NUM_QUEUES); 1881 return -EINVAL; 1882 } 1883 1884 io_sq = &ena_dev->io_sq_queues[ctx->qid]; 1885 io_cq = &ena_dev->io_cq_queues[ctx->qid]; 1886 1887 memset(io_sq, 0x0, sizeof(*io_sq)); 1888 memset(io_cq, 0x0, sizeof(*io_cq)); 1889 1890 /* Init CQ */ 1891 io_cq->q_depth = ctx->queue_size; 1892 io_cq->direction = ctx->direction; 1893 io_cq->qid = ctx->qid; 1894 1895 io_cq->msix_vector = ctx->msix_vector; 1896 1897 io_sq->q_depth = ctx->queue_size; 1898 io_sq->direction = ctx->direction; 1899 io_sq->qid = ctx->qid; 1900 1901 io_sq->mem_queue_type = ctx->mem_queue_type; 1902 1903 if (ctx->direction == ENA_COM_IO_QUEUE_DIRECTION_TX) 1904 /* header length is limited to 8 bits */ 1905 io_sq->tx_max_header_size = 1906 min_t(u32, ena_dev->tx_max_header_size, SZ_256); 1907 1908 ret = ena_com_init_io_sq(ena_dev, ctx, io_sq); 1909 if (ret) 1910 goto error; 1911 ret = ena_com_init_io_cq(ena_dev, ctx, io_cq); 1912 if (ret) 1913 goto error; 1914 1915 ret = ena_com_create_io_cq(ena_dev, io_cq); 1916 if (ret) 1917 goto error; 1918 1919 ret = ena_com_create_io_sq(ena_dev, io_sq, io_cq->idx); 1920 if (ret) 1921 goto destroy_io_cq; 1922 1923 return 0; 1924 1925 destroy_io_cq: 1926 ena_com_destroy_io_cq(ena_dev, io_cq); 1927 error: 1928 ena_com_io_queue_free(ena_dev, io_sq, io_cq); 1929 return ret; 1930 } 1931 1932 void ena_com_destroy_io_queue(struct ena_com_dev *ena_dev, u16 qid) 1933 { 1934 struct ena_com_io_sq *io_sq; 1935 struct ena_com_io_cq *io_cq; 1936 1937 if (qid >= ENA_TOTAL_NUM_QUEUES) { 1938 netdev_err(ena_dev->net_device, 1939 "Qid (%d) is bigger than max num of queues (%d)\n", 1940 qid, ENA_TOTAL_NUM_QUEUES); 1941 return; 1942 } 1943 1944 io_sq = &ena_dev->io_sq_queues[qid]; 1945 io_cq = &ena_dev->io_cq_queues[qid]; 1946 1947 ena_com_destroy_io_sq(ena_dev, io_sq); 1948 ena_com_destroy_io_cq(ena_dev, io_cq); 1949 1950 ena_com_io_queue_free(ena_dev, io_sq, io_cq); 1951 } 1952 1953 int ena_com_get_link_params(struct ena_com_dev *ena_dev, 1954 struct ena_admin_get_feat_resp *resp) 1955 { 1956 return ena_com_get_feature(ena_dev, resp, ENA_ADMIN_LINK_CONFIG, 0); 1957 } 1958 1959 int ena_com_get_dev_attr_feat(struct ena_com_dev *ena_dev, 1960 struct ena_com_dev_get_features_ctx *get_feat_ctx) 1961 { 1962 struct ena_admin_get_feat_resp get_resp; 1963 int rc; 1964 1965 rc = ena_com_get_feature(ena_dev, &get_resp, 1966 ENA_ADMIN_DEVICE_ATTRIBUTES, 0); 1967 if (rc) 1968 return rc; 1969 1970 memcpy(&get_feat_ctx->dev_attr, &get_resp.u.dev_attr, 1971 sizeof(get_resp.u.dev_attr)); 1972 1973 ena_dev->supported_features = get_resp.u.dev_attr.supported_features; 1974 1975 if (ena_dev->supported_features & BIT(ENA_ADMIN_MAX_QUEUES_EXT)) { 1976 rc = ena_com_get_feature(ena_dev, &get_resp, 1977 ENA_ADMIN_MAX_QUEUES_EXT, 1978 ENA_FEATURE_MAX_QUEUE_EXT_VER); 1979 if (rc) 1980 return rc; 1981 1982 if (get_resp.u.max_queue_ext.version != ENA_FEATURE_MAX_QUEUE_EXT_VER) 1983 return -EINVAL; 1984 1985 memcpy(&get_feat_ctx->max_queue_ext, &get_resp.u.max_queue_ext, 1986 sizeof(get_resp.u.max_queue_ext)); 1987 ena_dev->tx_max_header_size = 1988 get_resp.u.max_queue_ext.max_queue_ext.max_tx_header_size; 1989 } else { 1990 rc = ena_com_get_feature(ena_dev, &get_resp, 1991 ENA_ADMIN_MAX_QUEUES_NUM, 0); 1992 memcpy(&get_feat_ctx->max_queues, &get_resp.u.max_queue, 1993 sizeof(get_resp.u.max_queue)); 1994 ena_dev->tx_max_header_size = 1995 get_resp.u.max_queue.max_header_size; 1996 1997 if (rc) 1998 return rc; 1999 } 2000 2001 rc = ena_com_get_feature(ena_dev, &get_resp, 2002 ENA_ADMIN_AENQ_CONFIG, 0); 2003 if (rc) 2004 return rc; 2005 2006 memcpy(&get_feat_ctx->aenq, &get_resp.u.aenq, 2007 sizeof(get_resp.u.aenq)); 2008 2009 rc = ena_com_get_feature(ena_dev, &get_resp, 2010 ENA_ADMIN_STATELESS_OFFLOAD_CONFIG, 0); 2011 if (rc) 2012 return rc; 2013 2014 memcpy(&get_feat_ctx->offload, &get_resp.u.offload, 2015 sizeof(get_resp.u.offload)); 2016 2017 /* Driver hints isn't mandatory admin command. So in case the 2018 * command isn't supported set driver hints to 0 2019 */ 2020 rc = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_HW_HINTS, 0); 2021 2022 if (!rc) 2023 memcpy(&get_feat_ctx->hw_hints, &get_resp.u.hw_hints, 2024 sizeof(get_resp.u.hw_hints)); 2025 else if (rc == -EOPNOTSUPP) 2026 memset(&get_feat_ctx->hw_hints, 0x0, 2027 sizeof(get_feat_ctx->hw_hints)); 2028 else 2029 return rc; 2030 2031 rc = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_LLQ, 0); 2032 if (!rc) 2033 memcpy(&get_feat_ctx->llq, &get_resp.u.llq, 2034 sizeof(get_resp.u.llq)); 2035 else if (rc == -EOPNOTSUPP) 2036 memset(&get_feat_ctx->llq, 0x0, sizeof(get_feat_ctx->llq)); 2037 else 2038 return rc; 2039 2040 return 0; 2041 } 2042 2043 void ena_com_admin_q_comp_intr_handler(struct ena_com_dev *ena_dev) 2044 { 2045 ena_com_handle_admin_completion(&ena_dev->admin_queue); 2046 } 2047 2048 /* ena_handle_specific_aenq_event: 2049 * return the handler that is relevant to the specific event group 2050 */ 2051 static ena_aenq_handler ena_com_get_specific_aenq_cb(struct ena_com_dev *ena_dev, 2052 u16 group) 2053 { 2054 struct ena_aenq_handlers *aenq_handlers = ena_dev->aenq.aenq_handlers; 2055 2056 if ((group < ENA_MAX_HANDLERS) && aenq_handlers->handlers[group]) 2057 return aenq_handlers->handlers[group]; 2058 2059 return aenq_handlers->unimplemented_handler; 2060 } 2061 2062 /* ena_aenq_intr_handler: 2063 * handles the aenq incoming events. 2064 * pop events from the queue and apply the specific handler 2065 */ 2066 void ena_com_aenq_intr_handler(struct ena_com_dev *ena_dev, void *data) 2067 { 2068 struct ena_admin_aenq_entry *aenq_e; 2069 struct ena_admin_aenq_common_desc *aenq_common; 2070 struct ena_com_aenq *aenq = &ena_dev->aenq; 2071 u64 timestamp; 2072 ena_aenq_handler handler_cb; 2073 u16 masked_head, processed = 0; 2074 u8 phase; 2075 2076 masked_head = aenq->head & (aenq->q_depth - 1); 2077 phase = aenq->phase; 2078 aenq_e = &aenq->entries[masked_head]; /* Get first entry */ 2079 aenq_common = &aenq_e->aenq_common_desc; 2080 2081 /* Go over all the events */ 2082 while ((READ_ONCE(aenq_common->flags) & 2083 ENA_ADMIN_AENQ_COMMON_DESC_PHASE_MASK) == phase) { 2084 /* Make sure the phase bit (ownership) is as expected before 2085 * reading the rest of the descriptor. 2086 */ 2087 dma_rmb(); 2088 2089 timestamp = (u64)aenq_common->timestamp_low | 2090 ((u64)aenq_common->timestamp_high << 32); 2091 2092 netdev_dbg(ena_dev->net_device, 2093 "AENQ! Group[%x] Syndrome[%x] timestamp: [%llus]\n", 2094 aenq_common->group, aenq_common->syndrome, timestamp); 2095 2096 /* Handle specific event*/ 2097 handler_cb = ena_com_get_specific_aenq_cb(ena_dev, 2098 aenq_common->group); 2099 handler_cb(data, aenq_e); /* call the actual event handler*/ 2100 2101 /* Get next event entry */ 2102 masked_head++; 2103 processed++; 2104 2105 if (unlikely(masked_head == aenq->q_depth)) { 2106 masked_head = 0; 2107 phase = !phase; 2108 } 2109 aenq_e = &aenq->entries[masked_head]; 2110 aenq_common = &aenq_e->aenq_common_desc; 2111 } 2112 2113 aenq->head += processed; 2114 aenq->phase = phase; 2115 2116 /* Don't update aenq doorbell if there weren't any processed events */ 2117 if (!processed) 2118 return; 2119 2120 /* write the aenq doorbell after all AENQ descriptors were read */ 2121 mb(); 2122 writel_relaxed((u32)aenq->head, 2123 ena_dev->reg_bar + ENA_REGS_AENQ_HEAD_DB_OFF); 2124 } 2125 2126 int ena_com_dev_reset(struct ena_com_dev *ena_dev, 2127 enum ena_regs_reset_reason_types reset_reason) 2128 { 2129 u32 stat, timeout, cap, reset_val; 2130 int rc; 2131 2132 stat = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF); 2133 cap = ena_com_reg_bar_read32(ena_dev, ENA_REGS_CAPS_OFF); 2134 2135 if (unlikely((stat == ENA_MMIO_READ_TIMEOUT) || 2136 (cap == ENA_MMIO_READ_TIMEOUT))) { 2137 netdev_err(ena_dev->net_device, "Reg read32 timeout occurred\n"); 2138 return -ETIME; 2139 } 2140 2141 if ((stat & ENA_REGS_DEV_STS_READY_MASK) == 0) { 2142 netdev_err(ena_dev->net_device, 2143 "Device isn't ready, can't reset device\n"); 2144 return -EINVAL; 2145 } 2146 2147 timeout = (cap & ENA_REGS_CAPS_RESET_TIMEOUT_MASK) >> 2148 ENA_REGS_CAPS_RESET_TIMEOUT_SHIFT; 2149 if (timeout == 0) { 2150 netdev_err(ena_dev->net_device, "Invalid timeout value\n"); 2151 return -EINVAL; 2152 } 2153 2154 /* start reset */ 2155 reset_val = ENA_REGS_DEV_CTL_DEV_RESET_MASK; 2156 reset_val |= (reset_reason << ENA_REGS_DEV_CTL_RESET_REASON_SHIFT) & 2157 ENA_REGS_DEV_CTL_RESET_REASON_MASK; 2158 writel(reset_val, ena_dev->reg_bar + ENA_REGS_DEV_CTL_OFF); 2159 2160 /* Write again the MMIO read request address */ 2161 ena_com_mmio_reg_read_request_write_dev_addr(ena_dev); 2162 2163 rc = wait_for_reset_state(ena_dev, timeout, 2164 ENA_REGS_DEV_STS_RESET_IN_PROGRESS_MASK); 2165 if (rc != 0) { 2166 netdev_err(ena_dev->net_device, 2167 "Reset indication didn't turn on\n"); 2168 return rc; 2169 } 2170 2171 /* reset done */ 2172 writel(0, ena_dev->reg_bar + ENA_REGS_DEV_CTL_OFF); 2173 rc = wait_for_reset_state(ena_dev, timeout, 0); 2174 if (rc != 0) { 2175 netdev_err(ena_dev->net_device, 2176 "Reset indication didn't turn off\n"); 2177 return rc; 2178 } 2179 2180 timeout = (cap & ENA_REGS_CAPS_ADMIN_CMD_TO_MASK) >> 2181 ENA_REGS_CAPS_ADMIN_CMD_TO_SHIFT; 2182 if (timeout) 2183 /* the resolution of timeout reg is 100ms */ 2184 ena_dev->admin_queue.completion_timeout = timeout * 100000; 2185 else 2186 ena_dev->admin_queue.completion_timeout = ADMIN_CMD_TIMEOUT_US; 2187 2188 return 0; 2189 } 2190 2191 static int ena_get_dev_stats(struct ena_com_dev *ena_dev, 2192 struct ena_com_stats_ctx *ctx, 2193 enum ena_admin_get_stats_type type) 2194 { 2195 struct ena_admin_aq_get_stats_cmd *get_cmd = &ctx->get_cmd; 2196 struct ena_admin_acq_get_stats_resp *get_resp = &ctx->get_resp; 2197 struct ena_com_admin_queue *admin_queue; 2198 int ret; 2199 2200 admin_queue = &ena_dev->admin_queue; 2201 2202 get_cmd->aq_common_descriptor.opcode = ENA_ADMIN_GET_STATS; 2203 get_cmd->aq_common_descriptor.flags = 0; 2204 get_cmd->type = type; 2205 2206 ret = ena_com_execute_admin_command(admin_queue, 2207 (struct ena_admin_aq_entry *)get_cmd, 2208 sizeof(*get_cmd), 2209 (struct ena_admin_acq_entry *)get_resp, 2210 sizeof(*get_resp)); 2211 2212 if (unlikely(ret)) 2213 netdev_err(ena_dev->net_device, 2214 "Failed to get stats. error: %d\n", ret); 2215 2216 return ret; 2217 } 2218 2219 int ena_com_get_eni_stats(struct ena_com_dev *ena_dev, 2220 struct ena_admin_eni_stats *stats) 2221 { 2222 struct ena_com_stats_ctx ctx; 2223 int ret; 2224 2225 memset(&ctx, 0x0, sizeof(ctx)); 2226 ret = ena_get_dev_stats(ena_dev, &ctx, ENA_ADMIN_GET_STATS_TYPE_ENI); 2227 if (likely(ret == 0)) 2228 memcpy(stats, &ctx.get_resp.u.eni_stats, 2229 sizeof(ctx.get_resp.u.eni_stats)); 2230 2231 return ret; 2232 } 2233 2234 int ena_com_get_dev_basic_stats(struct ena_com_dev *ena_dev, 2235 struct ena_admin_basic_stats *stats) 2236 { 2237 struct ena_com_stats_ctx ctx; 2238 int ret; 2239 2240 memset(&ctx, 0x0, sizeof(ctx)); 2241 ret = ena_get_dev_stats(ena_dev, &ctx, ENA_ADMIN_GET_STATS_TYPE_BASIC); 2242 if (likely(ret == 0)) 2243 memcpy(stats, &ctx.get_resp.u.basic_stats, 2244 sizeof(ctx.get_resp.u.basic_stats)); 2245 2246 return ret; 2247 } 2248 2249 int ena_com_set_dev_mtu(struct ena_com_dev *ena_dev, u32 mtu) 2250 { 2251 struct ena_com_admin_queue *admin_queue; 2252 struct ena_admin_set_feat_cmd cmd; 2253 struct ena_admin_set_feat_resp resp; 2254 int ret; 2255 2256 if (!ena_com_check_supported_feature_id(ena_dev, ENA_ADMIN_MTU)) { 2257 netdev_dbg(ena_dev->net_device, "Feature %d isn't supported\n", 2258 ENA_ADMIN_MTU); 2259 return -EOPNOTSUPP; 2260 } 2261 2262 memset(&cmd, 0x0, sizeof(cmd)); 2263 admin_queue = &ena_dev->admin_queue; 2264 2265 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE; 2266 cmd.aq_common_descriptor.flags = 0; 2267 cmd.feat_common.feature_id = ENA_ADMIN_MTU; 2268 cmd.u.mtu.mtu = mtu; 2269 2270 ret = ena_com_execute_admin_command(admin_queue, 2271 (struct ena_admin_aq_entry *)&cmd, 2272 sizeof(cmd), 2273 (struct ena_admin_acq_entry *)&resp, 2274 sizeof(resp)); 2275 2276 if (unlikely(ret)) 2277 netdev_err(ena_dev->net_device, 2278 "Failed to set mtu %d. error: %d\n", mtu, ret); 2279 2280 return ret; 2281 } 2282 2283 int ena_com_get_offload_settings(struct ena_com_dev *ena_dev, 2284 struct ena_admin_feature_offload_desc *offload) 2285 { 2286 int ret; 2287 struct ena_admin_get_feat_resp resp; 2288 2289 ret = ena_com_get_feature(ena_dev, &resp, 2290 ENA_ADMIN_STATELESS_OFFLOAD_CONFIG, 0); 2291 if (unlikely(ret)) { 2292 netdev_err(ena_dev->net_device, 2293 "Failed to get offload capabilities %d\n", ret); 2294 return ret; 2295 } 2296 2297 memcpy(offload, &resp.u.offload, sizeof(resp.u.offload)); 2298 2299 return 0; 2300 } 2301 2302 int ena_com_set_hash_function(struct ena_com_dev *ena_dev) 2303 { 2304 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue; 2305 struct ena_rss *rss = &ena_dev->rss; 2306 struct ena_admin_set_feat_cmd cmd; 2307 struct ena_admin_set_feat_resp resp; 2308 struct ena_admin_get_feat_resp get_resp; 2309 int ret; 2310 2311 if (!ena_com_check_supported_feature_id(ena_dev, 2312 ENA_ADMIN_RSS_HASH_FUNCTION)) { 2313 netdev_dbg(ena_dev->net_device, "Feature %d isn't supported\n", 2314 ENA_ADMIN_RSS_HASH_FUNCTION); 2315 return -EOPNOTSUPP; 2316 } 2317 2318 /* Validate hash function is supported */ 2319 ret = ena_com_get_feature(ena_dev, &get_resp, 2320 ENA_ADMIN_RSS_HASH_FUNCTION, 0); 2321 if (unlikely(ret)) 2322 return ret; 2323 2324 if (!(get_resp.u.flow_hash_func.supported_func & BIT(rss->hash_func))) { 2325 netdev_err(ena_dev->net_device, 2326 "Func hash %d isn't supported by device, abort\n", 2327 rss->hash_func); 2328 return -EOPNOTSUPP; 2329 } 2330 2331 memset(&cmd, 0x0, sizeof(cmd)); 2332 2333 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE; 2334 cmd.aq_common_descriptor.flags = 2335 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK; 2336 cmd.feat_common.feature_id = ENA_ADMIN_RSS_HASH_FUNCTION; 2337 cmd.u.flow_hash_func.init_val = rss->hash_init_val; 2338 cmd.u.flow_hash_func.selected_func = 1 << rss->hash_func; 2339 2340 ret = ena_com_mem_addr_set(ena_dev, 2341 &cmd.control_buffer.address, 2342 rss->hash_key_dma_addr); 2343 if (unlikely(ret)) { 2344 netdev_err(ena_dev->net_device, "Memory address set failed\n"); 2345 return ret; 2346 } 2347 2348 cmd.control_buffer.length = sizeof(*rss->hash_key); 2349 2350 ret = ena_com_execute_admin_command(admin_queue, 2351 (struct ena_admin_aq_entry *)&cmd, 2352 sizeof(cmd), 2353 (struct ena_admin_acq_entry *)&resp, 2354 sizeof(resp)); 2355 if (unlikely(ret)) { 2356 netdev_err(ena_dev->net_device, 2357 "Failed to set hash function %d. error: %d\n", 2358 rss->hash_func, ret); 2359 return -EINVAL; 2360 } 2361 2362 return 0; 2363 } 2364 2365 int ena_com_fill_hash_function(struct ena_com_dev *ena_dev, 2366 enum ena_admin_hash_functions func, 2367 const u8 *key, u16 key_len, u32 init_val) 2368 { 2369 struct ena_admin_feature_rss_flow_hash_control *hash_key; 2370 struct ena_admin_get_feat_resp get_resp; 2371 enum ena_admin_hash_functions old_func; 2372 struct ena_rss *rss = &ena_dev->rss; 2373 int rc; 2374 2375 hash_key = rss->hash_key; 2376 2377 /* Make sure size is a mult of DWs */ 2378 if (unlikely(key_len & 0x3)) 2379 return -EINVAL; 2380 2381 rc = ena_com_get_feature_ex(ena_dev, &get_resp, 2382 ENA_ADMIN_RSS_HASH_FUNCTION, 2383 rss->hash_key_dma_addr, 2384 sizeof(*rss->hash_key), 0); 2385 if (unlikely(rc)) 2386 return rc; 2387 2388 if (!(BIT(func) & get_resp.u.flow_hash_func.supported_func)) { 2389 netdev_err(ena_dev->net_device, 2390 "Flow hash function %d isn't supported\n", func); 2391 return -EOPNOTSUPP; 2392 } 2393 2394 switch (func) { 2395 case ENA_ADMIN_TOEPLITZ: 2396 if (key) { 2397 if (key_len != sizeof(hash_key->key)) { 2398 netdev_err(ena_dev->net_device, 2399 "key len (%u) doesn't equal the supported size (%zu)\n", 2400 key_len, sizeof(hash_key->key)); 2401 return -EINVAL; 2402 } 2403 memcpy(hash_key->key, key, key_len); 2404 rss->hash_init_val = init_val; 2405 hash_key->key_parts = key_len / sizeof(hash_key->key[0]); 2406 } 2407 break; 2408 case ENA_ADMIN_CRC32: 2409 rss->hash_init_val = init_val; 2410 break; 2411 default: 2412 netdev_err(ena_dev->net_device, "Invalid hash function (%d)\n", 2413 func); 2414 return -EINVAL; 2415 } 2416 2417 old_func = rss->hash_func; 2418 rss->hash_func = func; 2419 rc = ena_com_set_hash_function(ena_dev); 2420 2421 /* Restore the old function */ 2422 if (unlikely(rc)) 2423 rss->hash_func = old_func; 2424 2425 return rc; 2426 } 2427 2428 int ena_com_get_hash_function(struct ena_com_dev *ena_dev, 2429 enum ena_admin_hash_functions *func) 2430 { 2431 struct ena_rss *rss = &ena_dev->rss; 2432 struct ena_admin_get_feat_resp get_resp; 2433 int rc; 2434 2435 if (unlikely(!func)) 2436 return -EINVAL; 2437 2438 rc = ena_com_get_feature_ex(ena_dev, &get_resp, 2439 ENA_ADMIN_RSS_HASH_FUNCTION, 2440 rss->hash_key_dma_addr, 2441 sizeof(*rss->hash_key), 0); 2442 if (unlikely(rc)) 2443 return rc; 2444 2445 /* ffs() returns 1 in case the lsb is set */ 2446 rss->hash_func = ffs(get_resp.u.flow_hash_func.selected_func); 2447 if (rss->hash_func) 2448 rss->hash_func--; 2449 2450 *func = rss->hash_func; 2451 2452 return 0; 2453 } 2454 2455 int ena_com_get_hash_key(struct ena_com_dev *ena_dev, u8 *key) 2456 { 2457 struct ena_admin_feature_rss_flow_hash_control *hash_key = 2458 ena_dev->rss.hash_key; 2459 2460 if (key) 2461 memcpy(key, hash_key->key, 2462 (size_t)(hash_key->key_parts) * sizeof(hash_key->key[0])); 2463 2464 return 0; 2465 } 2466 2467 int ena_com_get_hash_ctrl(struct ena_com_dev *ena_dev, 2468 enum ena_admin_flow_hash_proto proto, 2469 u16 *fields) 2470 { 2471 struct ena_rss *rss = &ena_dev->rss; 2472 struct ena_admin_get_feat_resp get_resp; 2473 int rc; 2474 2475 rc = ena_com_get_feature_ex(ena_dev, &get_resp, 2476 ENA_ADMIN_RSS_HASH_INPUT, 2477 rss->hash_ctrl_dma_addr, 2478 sizeof(*rss->hash_ctrl), 0); 2479 if (unlikely(rc)) 2480 return rc; 2481 2482 if (fields) 2483 *fields = rss->hash_ctrl->selected_fields[proto].fields; 2484 2485 return 0; 2486 } 2487 2488 int ena_com_set_hash_ctrl(struct ena_com_dev *ena_dev) 2489 { 2490 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue; 2491 struct ena_rss *rss = &ena_dev->rss; 2492 struct ena_admin_feature_rss_hash_control *hash_ctrl = rss->hash_ctrl; 2493 struct ena_admin_set_feat_cmd cmd; 2494 struct ena_admin_set_feat_resp resp; 2495 int ret; 2496 2497 if (!ena_com_check_supported_feature_id(ena_dev, 2498 ENA_ADMIN_RSS_HASH_INPUT)) { 2499 netdev_dbg(ena_dev->net_device, "Feature %d isn't supported\n", 2500 ENA_ADMIN_RSS_HASH_INPUT); 2501 return -EOPNOTSUPP; 2502 } 2503 2504 memset(&cmd, 0x0, sizeof(cmd)); 2505 2506 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE; 2507 cmd.aq_common_descriptor.flags = 2508 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK; 2509 cmd.feat_common.feature_id = ENA_ADMIN_RSS_HASH_INPUT; 2510 cmd.u.flow_hash_input.enabled_input_sort = 2511 ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L3_SORT_MASK | 2512 ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L4_SORT_MASK; 2513 2514 ret = ena_com_mem_addr_set(ena_dev, 2515 &cmd.control_buffer.address, 2516 rss->hash_ctrl_dma_addr); 2517 if (unlikely(ret)) { 2518 netdev_err(ena_dev->net_device, "Memory address set failed\n"); 2519 return ret; 2520 } 2521 cmd.control_buffer.length = sizeof(*hash_ctrl); 2522 2523 ret = ena_com_execute_admin_command(admin_queue, 2524 (struct ena_admin_aq_entry *)&cmd, 2525 sizeof(cmd), 2526 (struct ena_admin_acq_entry *)&resp, 2527 sizeof(resp)); 2528 if (unlikely(ret)) 2529 netdev_err(ena_dev->net_device, 2530 "Failed to set hash input. error: %d\n", ret); 2531 2532 return ret; 2533 } 2534 2535 int ena_com_set_default_hash_ctrl(struct ena_com_dev *ena_dev) 2536 { 2537 struct ena_rss *rss = &ena_dev->rss; 2538 struct ena_admin_feature_rss_hash_control *hash_ctrl = 2539 rss->hash_ctrl; 2540 u16 available_fields = 0; 2541 int rc, i; 2542 2543 /* Get the supported hash input */ 2544 rc = ena_com_get_hash_ctrl(ena_dev, 0, NULL); 2545 if (unlikely(rc)) 2546 return rc; 2547 2548 hash_ctrl->selected_fields[ENA_ADMIN_RSS_TCP4].fields = 2549 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA | 2550 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP; 2551 2552 hash_ctrl->selected_fields[ENA_ADMIN_RSS_UDP4].fields = 2553 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA | 2554 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP; 2555 2556 hash_ctrl->selected_fields[ENA_ADMIN_RSS_TCP6].fields = 2557 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA | 2558 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP; 2559 2560 hash_ctrl->selected_fields[ENA_ADMIN_RSS_UDP6].fields = 2561 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA | 2562 ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP; 2563 2564 hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP4].fields = 2565 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA; 2566 2567 hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP6].fields = 2568 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA; 2569 2570 hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP4_FRAG].fields = 2571 ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA; 2572 2573 hash_ctrl->selected_fields[ENA_ADMIN_RSS_NOT_IP].fields = 2574 ENA_ADMIN_RSS_L2_DA | ENA_ADMIN_RSS_L2_SA; 2575 2576 for (i = 0; i < ENA_ADMIN_RSS_PROTO_NUM; i++) { 2577 available_fields = hash_ctrl->selected_fields[i].fields & 2578 hash_ctrl->supported_fields[i].fields; 2579 if (available_fields != hash_ctrl->selected_fields[i].fields) { 2580 netdev_err(ena_dev->net_device, 2581 "Hash control doesn't support all the desire configuration. proto %x supported %x selected %x\n", 2582 i, hash_ctrl->supported_fields[i].fields, 2583 hash_ctrl->selected_fields[i].fields); 2584 return -EOPNOTSUPP; 2585 } 2586 } 2587 2588 rc = ena_com_set_hash_ctrl(ena_dev); 2589 2590 /* In case of failure, restore the old hash ctrl */ 2591 if (unlikely(rc)) 2592 ena_com_get_hash_ctrl(ena_dev, 0, NULL); 2593 2594 return rc; 2595 } 2596 2597 int ena_com_fill_hash_ctrl(struct ena_com_dev *ena_dev, 2598 enum ena_admin_flow_hash_proto proto, 2599 u16 hash_fields) 2600 { 2601 struct ena_rss *rss = &ena_dev->rss; 2602 struct ena_admin_feature_rss_hash_control *hash_ctrl = rss->hash_ctrl; 2603 u16 supported_fields; 2604 int rc; 2605 2606 if (proto >= ENA_ADMIN_RSS_PROTO_NUM) { 2607 netdev_err(ena_dev->net_device, "Invalid proto num (%u)\n", 2608 proto); 2609 return -EINVAL; 2610 } 2611 2612 /* Get the ctrl table */ 2613 rc = ena_com_get_hash_ctrl(ena_dev, proto, NULL); 2614 if (unlikely(rc)) 2615 return rc; 2616 2617 /* Make sure all the fields are supported */ 2618 supported_fields = hash_ctrl->supported_fields[proto].fields; 2619 if ((hash_fields & supported_fields) != hash_fields) { 2620 netdev_err(ena_dev->net_device, 2621 "Proto %d doesn't support the required fields %x. supports only: %x\n", 2622 proto, hash_fields, supported_fields); 2623 } 2624 2625 hash_ctrl->selected_fields[proto].fields = hash_fields; 2626 2627 rc = ena_com_set_hash_ctrl(ena_dev); 2628 2629 /* In case of failure, restore the old hash ctrl */ 2630 if (unlikely(rc)) 2631 ena_com_get_hash_ctrl(ena_dev, 0, NULL); 2632 2633 return 0; 2634 } 2635 2636 int ena_com_indirect_table_fill_entry(struct ena_com_dev *ena_dev, 2637 u16 entry_idx, u16 entry_value) 2638 { 2639 struct ena_rss *rss = &ena_dev->rss; 2640 2641 if (unlikely(entry_idx >= (1 << rss->tbl_log_size))) 2642 return -EINVAL; 2643 2644 if (unlikely((entry_value > ENA_TOTAL_NUM_QUEUES))) 2645 return -EINVAL; 2646 2647 rss->host_rss_ind_tbl[entry_idx] = entry_value; 2648 2649 return 0; 2650 } 2651 2652 int ena_com_indirect_table_set(struct ena_com_dev *ena_dev) 2653 { 2654 struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue; 2655 struct ena_rss *rss = &ena_dev->rss; 2656 struct ena_admin_set_feat_cmd cmd; 2657 struct ena_admin_set_feat_resp resp; 2658 int ret; 2659 2660 if (!ena_com_check_supported_feature_id( 2661 ena_dev, ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG)) { 2662 netdev_dbg(ena_dev->net_device, "Feature %d isn't supported\n", 2663 ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG); 2664 return -EOPNOTSUPP; 2665 } 2666 2667 ret = ena_com_ind_tbl_convert_to_device(ena_dev); 2668 if (ret) { 2669 netdev_err(ena_dev->net_device, 2670 "Failed to convert host indirection table to device table\n"); 2671 return ret; 2672 } 2673 2674 memset(&cmd, 0x0, sizeof(cmd)); 2675 2676 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE; 2677 cmd.aq_common_descriptor.flags = 2678 ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK; 2679 cmd.feat_common.feature_id = ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG; 2680 cmd.u.ind_table.size = rss->tbl_log_size; 2681 cmd.u.ind_table.inline_index = 0xFFFFFFFF; 2682 2683 ret = ena_com_mem_addr_set(ena_dev, 2684 &cmd.control_buffer.address, 2685 rss->rss_ind_tbl_dma_addr); 2686 if (unlikely(ret)) { 2687 netdev_err(ena_dev->net_device, "Memory address set failed\n"); 2688 return ret; 2689 } 2690 2691 cmd.control_buffer.length = (1ULL << rss->tbl_log_size) * 2692 sizeof(struct ena_admin_rss_ind_table_entry); 2693 2694 ret = ena_com_execute_admin_command(admin_queue, 2695 (struct ena_admin_aq_entry *)&cmd, 2696 sizeof(cmd), 2697 (struct ena_admin_acq_entry *)&resp, 2698 sizeof(resp)); 2699 2700 if (unlikely(ret)) 2701 netdev_err(ena_dev->net_device, 2702 "Failed to set indirect table. error: %d\n", ret); 2703 2704 return ret; 2705 } 2706 2707 int ena_com_indirect_table_get(struct ena_com_dev *ena_dev, u32 *ind_tbl) 2708 { 2709 struct ena_rss *rss = &ena_dev->rss; 2710 struct ena_admin_get_feat_resp get_resp; 2711 u32 tbl_size; 2712 int i, rc; 2713 2714 tbl_size = (1ULL << rss->tbl_log_size) * 2715 sizeof(struct ena_admin_rss_ind_table_entry); 2716 2717 rc = ena_com_get_feature_ex(ena_dev, &get_resp, 2718 ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG, 2719 rss->rss_ind_tbl_dma_addr, 2720 tbl_size, 0); 2721 if (unlikely(rc)) 2722 return rc; 2723 2724 if (!ind_tbl) 2725 return 0; 2726 2727 for (i = 0; i < (1 << rss->tbl_log_size); i++) 2728 ind_tbl[i] = rss->host_rss_ind_tbl[i]; 2729 2730 return 0; 2731 } 2732 2733 int ena_com_rss_init(struct ena_com_dev *ena_dev, u16 indr_tbl_log_size) 2734 { 2735 int rc; 2736 2737 memset(&ena_dev->rss, 0x0, sizeof(ena_dev->rss)); 2738 2739 rc = ena_com_indirect_table_allocate(ena_dev, indr_tbl_log_size); 2740 if (unlikely(rc)) 2741 goto err_indr_tbl; 2742 2743 /* The following function might return unsupported in case the 2744 * device doesn't support setting the key / hash function. We can safely 2745 * ignore this error and have indirection table support only. 2746 */ 2747 rc = ena_com_hash_key_allocate(ena_dev); 2748 if (likely(!rc)) 2749 ena_com_hash_key_fill_default_key(ena_dev); 2750 else if (rc != -EOPNOTSUPP) 2751 goto err_hash_key; 2752 2753 rc = ena_com_hash_ctrl_init(ena_dev); 2754 if (unlikely(rc)) 2755 goto err_hash_ctrl; 2756 2757 return 0; 2758 2759 err_hash_ctrl: 2760 ena_com_hash_key_destroy(ena_dev); 2761 err_hash_key: 2762 ena_com_indirect_table_destroy(ena_dev); 2763 err_indr_tbl: 2764 2765 return rc; 2766 } 2767 2768 void ena_com_rss_destroy(struct ena_com_dev *ena_dev) 2769 { 2770 ena_com_indirect_table_destroy(ena_dev); 2771 ena_com_hash_key_destroy(ena_dev); 2772 ena_com_hash_ctrl_destroy(ena_dev); 2773 2774 memset(&ena_dev->rss, 0x0, sizeof(ena_dev->rss)); 2775 } 2776 2777 int ena_com_allocate_host_info(struct ena_com_dev *ena_dev) 2778 { 2779 struct ena_host_attribute *host_attr = &ena_dev->host_attr; 2780 2781 host_attr->host_info = 2782 dma_alloc_coherent(ena_dev->dmadev, SZ_4K, 2783 &host_attr->host_info_dma_addr, GFP_KERNEL); 2784 if (unlikely(!host_attr->host_info)) 2785 return -ENOMEM; 2786 2787 host_attr->host_info->ena_spec_version = ((ENA_COMMON_SPEC_VERSION_MAJOR << 2788 ENA_REGS_VERSION_MAJOR_VERSION_SHIFT) | 2789 (ENA_COMMON_SPEC_VERSION_MINOR)); 2790 2791 return 0; 2792 } 2793 2794 int ena_com_allocate_debug_area(struct ena_com_dev *ena_dev, 2795 u32 debug_area_size) 2796 { 2797 struct ena_host_attribute *host_attr = &ena_dev->host_attr; 2798 2799 host_attr->debug_area_virt_addr = 2800 dma_alloc_coherent(ena_dev->dmadev, debug_area_size, 2801 &host_attr->debug_area_dma_addr, GFP_KERNEL); 2802 if (unlikely(!host_attr->debug_area_virt_addr)) { 2803 host_attr->debug_area_size = 0; 2804 return -ENOMEM; 2805 } 2806 2807 host_attr->debug_area_size = debug_area_size; 2808 2809 return 0; 2810 } 2811 2812 void ena_com_delete_host_info(struct ena_com_dev *ena_dev) 2813 { 2814 struct ena_host_attribute *host_attr = &ena_dev->host_attr; 2815 2816 if (host_attr->host_info) { 2817 dma_free_coherent(ena_dev->dmadev, SZ_4K, host_attr->host_info, 2818 host_attr->host_info_dma_addr); 2819 host_attr->host_info = NULL; 2820 } 2821 } 2822 2823 void ena_com_delete_debug_area(struct ena_com_dev *ena_dev) 2824 { 2825 struct ena_host_attribute *host_attr = &ena_dev->host_attr; 2826 2827 if (host_attr->debug_area_virt_addr) { 2828 dma_free_coherent(ena_dev->dmadev, host_attr->debug_area_size, 2829 host_attr->debug_area_virt_addr, 2830 host_attr->debug_area_dma_addr); 2831 host_attr->debug_area_virt_addr = NULL; 2832 } 2833 } 2834 2835 int ena_com_set_host_attributes(struct ena_com_dev *ena_dev) 2836 { 2837 struct ena_host_attribute *host_attr = &ena_dev->host_attr; 2838 struct ena_com_admin_queue *admin_queue; 2839 struct ena_admin_set_feat_cmd cmd; 2840 struct ena_admin_set_feat_resp resp; 2841 2842 int ret; 2843 2844 /* Host attribute config is called before ena_com_get_dev_attr_feat 2845 * so ena_com can't check if the feature is supported. 2846 */ 2847 2848 memset(&cmd, 0x0, sizeof(cmd)); 2849 admin_queue = &ena_dev->admin_queue; 2850 2851 cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE; 2852 cmd.feat_common.feature_id = ENA_ADMIN_HOST_ATTR_CONFIG; 2853 2854 ret = ena_com_mem_addr_set(ena_dev, 2855 &cmd.u.host_attr.debug_ba, 2856 host_attr->debug_area_dma_addr); 2857 if (unlikely(ret)) { 2858 netdev_err(ena_dev->net_device, "Memory address set failed\n"); 2859 return ret; 2860 } 2861 2862 ret = ena_com_mem_addr_set(ena_dev, 2863 &cmd.u.host_attr.os_info_ba, 2864 host_attr->host_info_dma_addr); 2865 if (unlikely(ret)) { 2866 netdev_err(ena_dev->net_device, "Memory address set failed\n"); 2867 return ret; 2868 } 2869 2870 cmd.u.host_attr.debug_area_size = host_attr->debug_area_size; 2871 2872 ret = ena_com_execute_admin_command(admin_queue, 2873 (struct ena_admin_aq_entry *)&cmd, 2874 sizeof(cmd), 2875 (struct ena_admin_acq_entry *)&resp, 2876 sizeof(resp)); 2877 2878 if (unlikely(ret)) 2879 netdev_err(ena_dev->net_device, 2880 "Failed to set host attributes: %d\n", ret); 2881 2882 return ret; 2883 } 2884 2885 /* Interrupt moderation */ 2886 bool ena_com_interrupt_moderation_supported(struct ena_com_dev *ena_dev) 2887 { 2888 return ena_com_check_supported_feature_id(ena_dev, 2889 ENA_ADMIN_INTERRUPT_MODERATION); 2890 } 2891 2892 static int ena_com_update_nonadaptive_moderation_interval(struct ena_com_dev *ena_dev, 2893 u32 coalesce_usecs, 2894 u32 intr_delay_resolution, 2895 u32 *intr_moder_interval) 2896 { 2897 if (!intr_delay_resolution) { 2898 netdev_err(ena_dev->net_device, 2899 "Illegal interrupt delay granularity value\n"); 2900 return -EFAULT; 2901 } 2902 2903 *intr_moder_interval = coalesce_usecs / intr_delay_resolution; 2904 2905 return 0; 2906 } 2907 2908 int ena_com_update_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev, 2909 u32 tx_coalesce_usecs) 2910 { 2911 return ena_com_update_nonadaptive_moderation_interval(ena_dev, 2912 tx_coalesce_usecs, 2913 ena_dev->intr_delay_resolution, 2914 &ena_dev->intr_moder_tx_interval); 2915 } 2916 2917 int ena_com_update_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev, 2918 u32 rx_coalesce_usecs) 2919 { 2920 return ena_com_update_nonadaptive_moderation_interval(ena_dev, 2921 rx_coalesce_usecs, 2922 ena_dev->intr_delay_resolution, 2923 &ena_dev->intr_moder_rx_interval); 2924 } 2925 2926 int ena_com_init_interrupt_moderation(struct ena_com_dev *ena_dev) 2927 { 2928 struct ena_admin_get_feat_resp get_resp; 2929 u16 delay_resolution; 2930 int rc; 2931 2932 rc = ena_com_get_feature(ena_dev, &get_resp, 2933 ENA_ADMIN_INTERRUPT_MODERATION, 0); 2934 2935 if (rc) { 2936 if (rc == -EOPNOTSUPP) { 2937 netdev_dbg(ena_dev->net_device, 2938 "Feature %d isn't supported\n", 2939 ENA_ADMIN_INTERRUPT_MODERATION); 2940 rc = 0; 2941 } else { 2942 netdev_err(ena_dev->net_device, 2943 "Failed to get interrupt moderation admin cmd. rc: %d\n", 2944 rc); 2945 } 2946 2947 /* no moderation supported, disable adaptive support */ 2948 ena_com_disable_adaptive_moderation(ena_dev); 2949 return rc; 2950 } 2951 2952 /* if moderation is supported by device we set adaptive moderation */ 2953 delay_resolution = get_resp.u.intr_moderation.intr_delay_resolution; 2954 ena_com_update_intr_delay_resolution(ena_dev, delay_resolution); 2955 2956 /* Disable adaptive moderation by default - can be enabled later */ 2957 ena_com_disable_adaptive_moderation(ena_dev); 2958 2959 return 0; 2960 } 2961 2962 unsigned int ena_com_get_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev) 2963 { 2964 return ena_dev->intr_moder_tx_interval; 2965 } 2966 2967 unsigned int ena_com_get_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev) 2968 { 2969 return ena_dev->intr_moder_rx_interval; 2970 } 2971 2972 int ena_com_config_dev_mode(struct ena_com_dev *ena_dev, 2973 struct ena_admin_feature_llq_desc *llq_features, 2974 struct ena_llq_configurations *llq_default_cfg) 2975 { 2976 struct ena_com_llq_info *llq_info = &ena_dev->llq_info; 2977 int rc; 2978 2979 if (!llq_features->max_llq_num) { 2980 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST; 2981 return 0; 2982 } 2983 2984 rc = ena_com_config_llq_info(ena_dev, llq_features, llq_default_cfg); 2985 if (rc) 2986 return rc; 2987 2988 ena_dev->tx_max_header_size = llq_info->desc_list_entry_size - 2989 (llq_info->descs_num_before_header * sizeof(struct ena_eth_io_tx_desc)); 2990 2991 if (unlikely(ena_dev->tx_max_header_size == 0)) { 2992 netdev_err(ena_dev->net_device, 2993 "The size of the LLQ entry is smaller than needed\n"); 2994 return -EINVAL; 2995 } 2996 2997 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_DEV; 2998 2999 return 0; 3000 } 3001