1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* Copyright (c) 2021, Microsoft Corporation. */ 3 4 #include <net/mana/gdma.h> 5 #include <net/mana/hw_channel.h> 6 7 static int mana_hwc_get_msg_index(struct hw_channel_context *hwc, u16 *msg_id) 8 { 9 struct gdma_resource *r = &hwc->inflight_msg_res; 10 unsigned long flags; 11 u32 index; 12 13 down(&hwc->sema); 14 15 spin_lock_irqsave(&r->lock, flags); 16 17 index = find_first_zero_bit(hwc->inflight_msg_res.map, 18 hwc->inflight_msg_res.size); 19 20 bitmap_set(hwc->inflight_msg_res.map, index, 1); 21 22 spin_unlock_irqrestore(&r->lock, flags); 23 24 *msg_id = index; 25 26 return 0; 27 } 28 29 static void mana_hwc_put_msg_index(struct hw_channel_context *hwc, u16 msg_id) 30 { 31 struct gdma_resource *r = &hwc->inflight_msg_res; 32 unsigned long flags; 33 34 spin_lock_irqsave(&r->lock, flags); 35 bitmap_clear(hwc->inflight_msg_res.map, msg_id, 1); 36 spin_unlock_irqrestore(&r->lock, flags); 37 38 up(&hwc->sema); 39 } 40 41 static int mana_hwc_verify_resp_msg(const struct hwc_caller_ctx *caller_ctx, 42 const struct gdma_resp_hdr *resp_msg, 43 u32 resp_len) 44 { 45 if (resp_len < sizeof(*resp_msg)) 46 return -EPROTO; 47 48 if (resp_len > caller_ctx->output_buflen) 49 return -EPROTO; 50 51 return 0; 52 } 53 54 static void mana_hwc_handle_resp(struct hw_channel_context *hwc, u32 resp_len, 55 const struct gdma_resp_hdr *resp_msg) 56 { 57 struct hwc_caller_ctx *ctx; 58 int err; 59 60 if (!test_bit(resp_msg->response.hwc_msg_id, 61 hwc->inflight_msg_res.map)) { 62 dev_err(hwc->dev, "hwc_rx: invalid msg_id = %u\n", 63 resp_msg->response.hwc_msg_id); 64 return; 65 } 66 67 ctx = hwc->caller_ctx + resp_msg->response.hwc_msg_id; 68 err = mana_hwc_verify_resp_msg(ctx, resp_msg, resp_len); 69 if (err) 70 goto out; 71 72 ctx->status_code = resp_msg->status; 73 74 memcpy(ctx->output_buf, resp_msg, resp_len); 75 out: 76 ctx->error = err; 77 complete(&ctx->comp_event); 78 } 79 80 static int mana_hwc_post_rx_wqe(const struct hwc_wq *hwc_rxq, 81 struct hwc_work_request *req) 82 { 83 struct device *dev = hwc_rxq->hwc->dev; 84 struct gdma_sge *sge; 85 int err; 86 87 sge = &req->sge; 88 sge->address = (u64)req->buf_sge_addr; 89 sge->mem_key = hwc_rxq->msg_buf->gpa_mkey; 90 sge->size = req->buf_len; 91 92 memset(&req->wqe_req, 0, sizeof(struct gdma_wqe_request)); 93 req->wqe_req.sgl = sge; 94 req->wqe_req.num_sge = 1; 95 req->wqe_req.client_data_unit = 0; 96 97 err = mana_gd_post_and_ring(hwc_rxq->gdma_wq, &req->wqe_req, NULL); 98 if (err) 99 dev_err(dev, "Failed to post WQE on HWC RQ: %d\n", err); 100 return err; 101 } 102 103 static void mana_hwc_init_event_handler(void *ctx, struct gdma_queue *q_self, 104 struct gdma_event *event) 105 { 106 struct hw_channel_context *hwc = ctx; 107 struct gdma_dev *gd = hwc->gdma_dev; 108 union hwc_init_type_data type_data; 109 union hwc_init_eq_id_db eq_db; 110 u32 type, val; 111 112 switch (event->type) { 113 case GDMA_EQE_HWC_INIT_EQ_ID_DB: 114 eq_db.as_uint32 = event->details[0]; 115 hwc->cq->gdma_eq->id = eq_db.eq_id; 116 gd->doorbell = eq_db.doorbell; 117 break; 118 119 case GDMA_EQE_HWC_INIT_DATA: 120 type_data.as_uint32 = event->details[0]; 121 type = type_data.type; 122 val = type_data.value; 123 124 switch (type) { 125 case HWC_INIT_DATA_CQID: 126 hwc->cq->gdma_cq->id = val; 127 break; 128 129 case HWC_INIT_DATA_RQID: 130 hwc->rxq->gdma_wq->id = val; 131 break; 132 133 case HWC_INIT_DATA_SQID: 134 hwc->txq->gdma_wq->id = val; 135 break; 136 137 case HWC_INIT_DATA_QUEUE_DEPTH: 138 hwc->hwc_init_q_depth_max = (u16)val; 139 break; 140 141 case HWC_INIT_DATA_MAX_REQUEST: 142 hwc->hwc_init_max_req_msg_size = val; 143 break; 144 145 case HWC_INIT_DATA_MAX_RESPONSE: 146 hwc->hwc_init_max_resp_msg_size = val; 147 break; 148 149 case HWC_INIT_DATA_MAX_NUM_CQS: 150 gd->gdma_context->max_num_cqs = val; 151 break; 152 153 case HWC_INIT_DATA_PDID: 154 hwc->gdma_dev->pdid = val; 155 break; 156 157 case HWC_INIT_DATA_GPA_MKEY: 158 hwc->rxq->msg_buf->gpa_mkey = val; 159 hwc->txq->msg_buf->gpa_mkey = val; 160 break; 161 162 case HWC_INIT_DATA_PF_DEST_RQ_ID: 163 hwc->pf_dest_vrq_id = val; 164 break; 165 166 case HWC_INIT_DATA_PF_DEST_CQ_ID: 167 hwc->pf_dest_vrcq_id = val; 168 break; 169 } 170 171 break; 172 173 case GDMA_EQE_HWC_INIT_DONE: 174 complete(&hwc->hwc_init_eqe_comp); 175 break; 176 177 default: 178 /* Ignore unknown events, which should never happen. */ 179 break; 180 } 181 } 182 183 static void mana_hwc_rx_event_handler(void *ctx, u32 gdma_rxq_id, 184 const struct hwc_rx_oob *rx_oob) 185 { 186 struct hw_channel_context *hwc = ctx; 187 struct hwc_wq *hwc_rxq = hwc->rxq; 188 struct hwc_work_request *rx_req; 189 struct gdma_resp_hdr *resp; 190 struct gdma_wqe *dma_oob; 191 struct gdma_queue *rq; 192 struct gdma_sge *sge; 193 u64 rq_base_addr; 194 u64 rx_req_idx; 195 u8 *wqe; 196 197 if (WARN_ON_ONCE(hwc_rxq->gdma_wq->id != gdma_rxq_id)) 198 return; 199 200 rq = hwc_rxq->gdma_wq; 201 wqe = mana_gd_get_wqe_ptr(rq, rx_oob->wqe_offset / GDMA_WQE_BU_SIZE); 202 dma_oob = (struct gdma_wqe *)wqe; 203 204 sge = (struct gdma_sge *)(wqe + 8 + dma_oob->inline_oob_size_div4 * 4); 205 206 /* Select the RX work request for virtual address and for reposting. */ 207 rq_base_addr = hwc_rxq->msg_buf->mem_info.dma_handle; 208 rx_req_idx = (sge->address - rq_base_addr) / hwc->max_req_msg_size; 209 210 rx_req = &hwc_rxq->msg_buf->reqs[rx_req_idx]; 211 resp = (struct gdma_resp_hdr *)rx_req->buf_va; 212 213 if (resp->response.hwc_msg_id >= hwc->num_inflight_msg) { 214 dev_err(hwc->dev, "HWC RX: wrong msg_id=%u\n", 215 resp->response.hwc_msg_id); 216 return; 217 } 218 219 mana_hwc_handle_resp(hwc, rx_oob->tx_oob_data_size, resp); 220 221 /* Do no longer use 'resp', because the buffer is posted to the HW 222 * in the below mana_hwc_post_rx_wqe(). 223 */ 224 resp = NULL; 225 226 mana_hwc_post_rx_wqe(hwc_rxq, rx_req); 227 } 228 229 static void mana_hwc_tx_event_handler(void *ctx, u32 gdma_txq_id, 230 const struct hwc_rx_oob *rx_oob) 231 { 232 struct hw_channel_context *hwc = ctx; 233 struct hwc_wq *hwc_txq = hwc->txq; 234 235 WARN_ON_ONCE(!hwc_txq || hwc_txq->gdma_wq->id != gdma_txq_id); 236 } 237 238 static int mana_hwc_create_gdma_wq(struct hw_channel_context *hwc, 239 enum gdma_queue_type type, u64 queue_size, 240 struct gdma_queue **queue) 241 { 242 struct gdma_queue_spec spec = {}; 243 244 if (type != GDMA_SQ && type != GDMA_RQ) 245 return -EINVAL; 246 247 spec.type = type; 248 spec.monitor_avl_buf = false; 249 spec.queue_size = queue_size; 250 251 return mana_gd_create_hwc_queue(hwc->gdma_dev, &spec, queue); 252 } 253 254 static int mana_hwc_create_gdma_cq(struct hw_channel_context *hwc, 255 u64 queue_size, 256 void *ctx, gdma_cq_callback *cb, 257 struct gdma_queue *parent_eq, 258 struct gdma_queue **queue) 259 { 260 struct gdma_queue_spec spec = {}; 261 262 spec.type = GDMA_CQ; 263 spec.monitor_avl_buf = false; 264 spec.queue_size = queue_size; 265 spec.cq.context = ctx; 266 spec.cq.callback = cb; 267 spec.cq.parent_eq = parent_eq; 268 269 return mana_gd_create_hwc_queue(hwc->gdma_dev, &spec, queue); 270 } 271 272 static int mana_hwc_create_gdma_eq(struct hw_channel_context *hwc, 273 u64 queue_size, 274 void *ctx, gdma_eq_callback *cb, 275 struct gdma_queue **queue) 276 { 277 struct gdma_queue_spec spec = {}; 278 279 spec.type = GDMA_EQ; 280 spec.monitor_avl_buf = false; 281 spec.queue_size = queue_size; 282 spec.eq.context = ctx; 283 spec.eq.callback = cb; 284 spec.eq.log2_throttle_limit = DEFAULT_LOG2_THROTTLING_FOR_ERROR_EQ; 285 286 return mana_gd_create_hwc_queue(hwc->gdma_dev, &spec, queue); 287 } 288 289 static void mana_hwc_comp_event(void *ctx, struct gdma_queue *q_self) 290 { 291 struct hwc_rx_oob comp_data = {}; 292 struct gdma_comp *completions; 293 struct hwc_cq *hwc_cq = ctx; 294 int comp_read, i; 295 296 WARN_ON_ONCE(hwc_cq->gdma_cq != q_self); 297 298 completions = hwc_cq->comp_buf; 299 comp_read = mana_gd_poll_cq(q_self, completions, hwc_cq->queue_depth); 300 WARN_ON_ONCE(comp_read <= 0 || comp_read > hwc_cq->queue_depth); 301 302 for (i = 0; i < comp_read; ++i) { 303 comp_data = *(struct hwc_rx_oob *)completions[i].cqe_data; 304 305 if (completions[i].is_sq) 306 hwc_cq->tx_event_handler(hwc_cq->tx_event_ctx, 307 completions[i].wq_num, 308 &comp_data); 309 else 310 hwc_cq->rx_event_handler(hwc_cq->rx_event_ctx, 311 completions[i].wq_num, 312 &comp_data); 313 } 314 315 mana_gd_ring_cq(q_self, SET_ARM_BIT); 316 } 317 318 static void mana_hwc_destroy_cq(struct gdma_context *gc, struct hwc_cq *hwc_cq) 319 { 320 kfree(hwc_cq->comp_buf); 321 322 if (hwc_cq->gdma_cq) 323 mana_gd_destroy_queue(gc, hwc_cq->gdma_cq); 324 325 if (hwc_cq->gdma_eq) 326 mana_gd_destroy_queue(gc, hwc_cq->gdma_eq); 327 328 kfree(hwc_cq); 329 } 330 331 static int mana_hwc_create_cq(struct hw_channel_context *hwc, u16 q_depth, 332 gdma_eq_callback *callback, void *ctx, 333 hwc_rx_event_handler_t *rx_ev_hdlr, 334 void *rx_ev_ctx, 335 hwc_tx_event_handler_t *tx_ev_hdlr, 336 void *tx_ev_ctx, struct hwc_cq **hwc_cq_ptr) 337 { 338 struct gdma_queue *eq, *cq; 339 struct gdma_comp *comp_buf; 340 struct hwc_cq *hwc_cq; 341 u32 eq_size, cq_size; 342 int err; 343 344 eq_size = roundup_pow_of_two(GDMA_EQE_SIZE * q_depth); 345 if (eq_size < MINIMUM_SUPPORTED_PAGE_SIZE) 346 eq_size = MINIMUM_SUPPORTED_PAGE_SIZE; 347 348 cq_size = roundup_pow_of_two(GDMA_CQE_SIZE * q_depth); 349 if (cq_size < MINIMUM_SUPPORTED_PAGE_SIZE) 350 cq_size = MINIMUM_SUPPORTED_PAGE_SIZE; 351 352 hwc_cq = kzalloc(sizeof(*hwc_cq), GFP_KERNEL); 353 if (!hwc_cq) 354 return -ENOMEM; 355 356 err = mana_hwc_create_gdma_eq(hwc, eq_size, ctx, callback, &eq); 357 if (err) { 358 dev_err(hwc->dev, "Failed to create HWC EQ for RQ: %d\n", err); 359 goto out; 360 } 361 hwc_cq->gdma_eq = eq; 362 363 err = mana_hwc_create_gdma_cq(hwc, cq_size, hwc_cq, mana_hwc_comp_event, 364 eq, &cq); 365 if (err) { 366 dev_err(hwc->dev, "Failed to create HWC CQ for RQ: %d\n", err); 367 goto out; 368 } 369 hwc_cq->gdma_cq = cq; 370 371 comp_buf = kcalloc(q_depth, sizeof(*comp_buf), GFP_KERNEL); 372 if (!comp_buf) { 373 err = -ENOMEM; 374 goto out; 375 } 376 377 hwc_cq->hwc = hwc; 378 hwc_cq->comp_buf = comp_buf; 379 hwc_cq->queue_depth = q_depth; 380 hwc_cq->rx_event_handler = rx_ev_hdlr; 381 hwc_cq->rx_event_ctx = rx_ev_ctx; 382 hwc_cq->tx_event_handler = tx_ev_hdlr; 383 hwc_cq->tx_event_ctx = tx_ev_ctx; 384 385 *hwc_cq_ptr = hwc_cq; 386 return 0; 387 out: 388 mana_hwc_destroy_cq(hwc->gdma_dev->gdma_context, hwc_cq); 389 return err; 390 } 391 392 static int mana_hwc_alloc_dma_buf(struct hw_channel_context *hwc, u16 q_depth, 393 u32 max_msg_size, 394 struct hwc_dma_buf **dma_buf_ptr) 395 { 396 struct gdma_context *gc = hwc->gdma_dev->gdma_context; 397 struct hwc_work_request *hwc_wr; 398 struct hwc_dma_buf *dma_buf; 399 struct gdma_mem_info *gmi; 400 void *virt_addr; 401 u32 buf_size; 402 u8 *base_pa; 403 int err; 404 u16 i; 405 406 dma_buf = kzalloc(struct_size(dma_buf, reqs, q_depth), GFP_KERNEL); 407 if (!dma_buf) 408 return -ENOMEM; 409 410 dma_buf->num_reqs = q_depth; 411 412 buf_size = PAGE_ALIGN(q_depth * max_msg_size); 413 414 gmi = &dma_buf->mem_info; 415 err = mana_gd_alloc_memory(gc, buf_size, gmi); 416 if (err) { 417 dev_err(hwc->dev, "Failed to allocate DMA buffer: %d\n", err); 418 goto out; 419 } 420 421 virt_addr = dma_buf->mem_info.virt_addr; 422 base_pa = (u8 *)dma_buf->mem_info.dma_handle; 423 424 for (i = 0; i < q_depth; i++) { 425 hwc_wr = &dma_buf->reqs[i]; 426 427 hwc_wr->buf_va = virt_addr + i * max_msg_size; 428 hwc_wr->buf_sge_addr = base_pa + i * max_msg_size; 429 430 hwc_wr->buf_len = max_msg_size; 431 } 432 433 *dma_buf_ptr = dma_buf; 434 return 0; 435 out: 436 kfree(dma_buf); 437 return err; 438 } 439 440 static void mana_hwc_dealloc_dma_buf(struct hw_channel_context *hwc, 441 struct hwc_dma_buf *dma_buf) 442 { 443 if (!dma_buf) 444 return; 445 446 mana_gd_free_memory(&dma_buf->mem_info); 447 448 kfree(dma_buf); 449 } 450 451 static void mana_hwc_destroy_wq(struct hw_channel_context *hwc, 452 struct hwc_wq *hwc_wq) 453 { 454 mana_hwc_dealloc_dma_buf(hwc, hwc_wq->msg_buf); 455 456 if (hwc_wq->gdma_wq) 457 mana_gd_destroy_queue(hwc->gdma_dev->gdma_context, 458 hwc_wq->gdma_wq); 459 460 kfree(hwc_wq); 461 } 462 463 static int mana_hwc_create_wq(struct hw_channel_context *hwc, 464 enum gdma_queue_type q_type, u16 q_depth, 465 u32 max_msg_size, struct hwc_cq *hwc_cq, 466 struct hwc_wq **hwc_wq_ptr) 467 { 468 struct gdma_queue *queue; 469 struct hwc_wq *hwc_wq; 470 u32 queue_size; 471 int err; 472 473 WARN_ON(q_type != GDMA_SQ && q_type != GDMA_RQ); 474 475 if (q_type == GDMA_RQ) 476 queue_size = roundup_pow_of_two(GDMA_MAX_RQE_SIZE * q_depth); 477 else 478 queue_size = roundup_pow_of_two(GDMA_MAX_SQE_SIZE * q_depth); 479 480 if (queue_size < MINIMUM_SUPPORTED_PAGE_SIZE) 481 queue_size = MINIMUM_SUPPORTED_PAGE_SIZE; 482 483 hwc_wq = kzalloc(sizeof(*hwc_wq), GFP_KERNEL); 484 if (!hwc_wq) 485 return -ENOMEM; 486 487 err = mana_hwc_create_gdma_wq(hwc, q_type, queue_size, &queue); 488 if (err) 489 goto out; 490 491 hwc_wq->hwc = hwc; 492 hwc_wq->gdma_wq = queue; 493 hwc_wq->queue_depth = q_depth; 494 hwc_wq->hwc_cq = hwc_cq; 495 496 err = mana_hwc_alloc_dma_buf(hwc, q_depth, max_msg_size, 497 &hwc_wq->msg_buf); 498 if (err) 499 goto out; 500 501 *hwc_wq_ptr = hwc_wq; 502 return 0; 503 out: 504 if (err) 505 mana_hwc_destroy_wq(hwc, hwc_wq); 506 return err; 507 } 508 509 static int mana_hwc_post_tx_wqe(const struct hwc_wq *hwc_txq, 510 struct hwc_work_request *req, 511 u32 dest_virt_rq_id, u32 dest_virt_rcq_id, 512 bool dest_pf) 513 { 514 struct device *dev = hwc_txq->hwc->dev; 515 struct hwc_tx_oob *tx_oob; 516 struct gdma_sge *sge; 517 int err; 518 519 if (req->msg_size == 0 || req->msg_size > req->buf_len) { 520 dev_err(dev, "wrong msg_size: %u, buf_len: %u\n", 521 req->msg_size, req->buf_len); 522 return -EINVAL; 523 } 524 525 tx_oob = &req->tx_oob; 526 527 tx_oob->vrq_id = dest_virt_rq_id; 528 tx_oob->dest_vfid = 0; 529 tx_oob->vrcq_id = dest_virt_rcq_id; 530 tx_oob->vscq_id = hwc_txq->hwc_cq->gdma_cq->id; 531 tx_oob->loopback = false; 532 tx_oob->lso_override = false; 533 tx_oob->dest_pf = dest_pf; 534 tx_oob->vsq_id = hwc_txq->gdma_wq->id; 535 536 sge = &req->sge; 537 sge->address = (u64)req->buf_sge_addr; 538 sge->mem_key = hwc_txq->msg_buf->gpa_mkey; 539 sge->size = req->msg_size; 540 541 memset(&req->wqe_req, 0, sizeof(struct gdma_wqe_request)); 542 req->wqe_req.sgl = sge; 543 req->wqe_req.num_sge = 1; 544 req->wqe_req.inline_oob_size = sizeof(struct hwc_tx_oob); 545 req->wqe_req.inline_oob_data = tx_oob; 546 req->wqe_req.client_data_unit = 0; 547 548 err = mana_gd_post_and_ring(hwc_txq->gdma_wq, &req->wqe_req, NULL); 549 if (err) 550 dev_err(dev, "Failed to post WQE on HWC SQ: %d\n", err); 551 return err; 552 } 553 554 static int mana_hwc_init_inflight_msg(struct hw_channel_context *hwc, 555 u16 num_msg) 556 { 557 int err; 558 559 sema_init(&hwc->sema, num_msg); 560 561 err = mana_gd_alloc_res_map(num_msg, &hwc->inflight_msg_res); 562 if (err) 563 dev_err(hwc->dev, "Failed to init inflight_msg_res: %d\n", err); 564 return err; 565 } 566 567 static int mana_hwc_test_channel(struct hw_channel_context *hwc, u16 q_depth, 568 u32 max_req_msg_size, u32 max_resp_msg_size) 569 { 570 struct gdma_context *gc = hwc->gdma_dev->gdma_context; 571 struct hwc_wq *hwc_rxq = hwc->rxq; 572 struct hwc_work_request *req; 573 struct hwc_caller_ctx *ctx; 574 int err; 575 int i; 576 577 /* Post all WQEs on the RQ */ 578 for (i = 0; i < q_depth; i++) { 579 req = &hwc_rxq->msg_buf->reqs[i]; 580 err = mana_hwc_post_rx_wqe(hwc_rxq, req); 581 if (err) 582 return err; 583 } 584 585 ctx = kcalloc(q_depth, sizeof(*ctx), GFP_KERNEL); 586 if (!ctx) 587 return -ENOMEM; 588 589 for (i = 0; i < q_depth; ++i) 590 init_completion(&ctx[i].comp_event); 591 592 hwc->caller_ctx = ctx; 593 594 return mana_gd_test_eq(gc, hwc->cq->gdma_eq); 595 } 596 597 static int mana_hwc_establish_channel(struct gdma_context *gc, u16 *q_depth, 598 u32 *max_req_msg_size, 599 u32 *max_resp_msg_size) 600 { 601 struct hw_channel_context *hwc = gc->hwc.driver_data; 602 struct gdma_queue *rq = hwc->rxq->gdma_wq; 603 struct gdma_queue *sq = hwc->txq->gdma_wq; 604 struct gdma_queue *eq = hwc->cq->gdma_eq; 605 struct gdma_queue *cq = hwc->cq->gdma_cq; 606 int err; 607 608 init_completion(&hwc->hwc_init_eqe_comp); 609 610 err = mana_smc_setup_hwc(&gc->shm_channel, false, 611 eq->mem_info.dma_handle, 612 cq->mem_info.dma_handle, 613 rq->mem_info.dma_handle, 614 sq->mem_info.dma_handle, 615 eq->eq.msix_index); 616 if (err) 617 return err; 618 619 if (!wait_for_completion_timeout(&hwc->hwc_init_eqe_comp, 60 * HZ)) 620 return -ETIMEDOUT; 621 622 *q_depth = hwc->hwc_init_q_depth_max; 623 *max_req_msg_size = hwc->hwc_init_max_req_msg_size; 624 *max_resp_msg_size = hwc->hwc_init_max_resp_msg_size; 625 626 /* Both were set in mana_hwc_init_event_handler(). */ 627 if (WARN_ON(cq->id >= gc->max_num_cqs)) 628 return -EPROTO; 629 630 gc->cq_table = vcalloc(gc->max_num_cqs, sizeof(struct gdma_queue *)); 631 if (!gc->cq_table) 632 return -ENOMEM; 633 634 gc->cq_table[cq->id] = cq; 635 636 return 0; 637 } 638 639 static int mana_hwc_init_queues(struct hw_channel_context *hwc, u16 q_depth, 640 u32 max_req_msg_size, u32 max_resp_msg_size) 641 { 642 int err; 643 644 err = mana_hwc_init_inflight_msg(hwc, q_depth); 645 if (err) 646 return err; 647 648 /* CQ is shared by SQ and RQ, so CQ's queue depth is the sum of SQ 649 * queue depth and RQ queue depth. 650 */ 651 err = mana_hwc_create_cq(hwc, q_depth * 2, 652 mana_hwc_init_event_handler, hwc, 653 mana_hwc_rx_event_handler, hwc, 654 mana_hwc_tx_event_handler, hwc, &hwc->cq); 655 if (err) { 656 dev_err(hwc->dev, "Failed to create HWC CQ: %d\n", err); 657 goto out; 658 } 659 660 err = mana_hwc_create_wq(hwc, GDMA_RQ, q_depth, max_req_msg_size, 661 hwc->cq, &hwc->rxq); 662 if (err) { 663 dev_err(hwc->dev, "Failed to create HWC RQ: %d\n", err); 664 goto out; 665 } 666 667 err = mana_hwc_create_wq(hwc, GDMA_SQ, q_depth, max_resp_msg_size, 668 hwc->cq, &hwc->txq); 669 if (err) { 670 dev_err(hwc->dev, "Failed to create HWC SQ: %d\n", err); 671 goto out; 672 } 673 674 hwc->num_inflight_msg = q_depth; 675 hwc->max_req_msg_size = max_req_msg_size; 676 677 return 0; 678 out: 679 /* mana_hwc_create_channel() will do the cleanup.*/ 680 return err; 681 } 682 683 int mana_hwc_create_channel(struct gdma_context *gc) 684 { 685 u32 max_req_msg_size, max_resp_msg_size; 686 struct gdma_dev *gd = &gc->hwc; 687 struct hw_channel_context *hwc; 688 u16 q_depth_max; 689 int err; 690 691 hwc = kzalloc(sizeof(*hwc), GFP_KERNEL); 692 if (!hwc) 693 return -ENOMEM; 694 695 gd->gdma_context = gc; 696 gd->driver_data = hwc; 697 hwc->gdma_dev = gd; 698 hwc->dev = gc->dev; 699 700 /* HWC's instance number is always 0. */ 701 gd->dev_id.as_uint32 = 0; 702 gd->dev_id.type = GDMA_DEVICE_HWC; 703 704 gd->pdid = INVALID_PDID; 705 gd->doorbell = INVALID_DOORBELL; 706 707 /* mana_hwc_init_queues() only creates the required data structures, 708 * and doesn't touch the HWC device. 709 */ 710 err = mana_hwc_init_queues(hwc, HW_CHANNEL_VF_BOOTSTRAP_QUEUE_DEPTH, 711 HW_CHANNEL_MAX_REQUEST_SIZE, 712 HW_CHANNEL_MAX_RESPONSE_SIZE); 713 if (err) { 714 dev_err(hwc->dev, "Failed to initialize HWC: %d\n", err); 715 goto out; 716 } 717 718 err = mana_hwc_establish_channel(gc, &q_depth_max, &max_req_msg_size, 719 &max_resp_msg_size); 720 if (err) { 721 dev_err(hwc->dev, "Failed to establish HWC: %d\n", err); 722 goto out; 723 } 724 725 err = mana_hwc_test_channel(gc->hwc.driver_data, 726 HW_CHANNEL_VF_BOOTSTRAP_QUEUE_DEPTH, 727 max_req_msg_size, max_resp_msg_size); 728 if (err) { 729 dev_err(hwc->dev, "Failed to test HWC: %d\n", err); 730 goto out; 731 } 732 733 return 0; 734 out: 735 mana_hwc_destroy_channel(gc); 736 return err; 737 } 738 739 void mana_hwc_destroy_channel(struct gdma_context *gc) 740 { 741 struct hw_channel_context *hwc = gc->hwc.driver_data; 742 743 if (!hwc) 744 return; 745 746 /* gc->max_num_cqs is set in mana_hwc_init_event_handler(). If it's 747 * non-zero, the HWC worked and we should tear down the HWC here. 748 */ 749 if (gc->max_num_cqs > 0) { 750 mana_smc_teardown_hwc(&gc->shm_channel, false); 751 gc->max_num_cqs = 0; 752 } 753 754 kfree(hwc->caller_ctx); 755 hwc->caller_ctx = NULL; 756 757 if (hwc->txq) 758 mana_hwc_destroy_wq(hwc, hwc->txq); 759 760 if (hwc->rxq) 761 mana_hwc_destroy_wq(hwc, hwc->rxq); 762 763 if (hwc->cq) 764 mana_hwc_destroy_cq(hwc->gdma_dev->gdma_context, hwc->cq); 765 766 mana_gd_free_res_map(&hwc->inflight_msg_res); 767 768 hwc->num_inflight_msg = 0; 769 770 hwc->gdma_dev->doorbell = INVALID_DOORBELL; 771 hwc->gdma_dev->pdid = INVALID_PDID; 772 773 kfree(hwc); 774 gc->hwc.driver_data = NULL; 775 gc->hwc.gdma_context = NULL; 776 777 vfree(gc->cq_table); 778 gc->cq_table = NULL; 779 } 780 781 int mana_hwc_send_request(struct hw_channel_context *hwc, u32 req_len, 782 const void *req, u32 resp_len, void *resp) 783 { 784 struct gdma_context *gc = hwc->gdma_dev->gdma_context; 785 struct hwc_work_request *tx_wr; 786 struct hwc_wq *txq = hwc->txq; 787 struct gdma_req_hdr *req_msg; 788 struct hwc_caller_ctx *ctx; 789 u32 dest_vrcq = 0; 790 u32 dest_vrq = 0; 791 u16 msg_id; 792 int err; 793 794 mana_hwc_get_msg_index(hwc, &msg_id); 795 796 tx_wr = &txq->msg_buf->reqs[msg_id]; 797 798 if (req_len > tx_wr->buf_len) { 799 dev_err(hwc->dev, "HWC: req msg size: %d > %d\n", req_len, 800 tx_wr->buf_len); 801 err = -EINVAL; 802 goto out; 803 } 804 805 ctx = hwc->caller_ctx + msg_id; 806 ctx->output_buf = resp; 807 ctx->output_buflen = resp_len; 808 809 req_msg = (struct gdma_req_hdr *)tx_wr->buf_va; 810 if (req) 811 memcpy(req_msg, req, req_len); 812 813 req_msg->req.hwc_msg_id = msg_id; 814 815 tx_wr->msg_size = req_len; 816 817 if (gc->is_pf) { 818 dest_vrq = hwc->pf_dest_vrq_id; 819 dest_vrcq = hwc->pf_dest_vrcq_id; 820 } 821 822 err = mana_hwc_post_tx_wqe(txq, tx_wr, dest_vrq, dest_vrcq, false); 823 if (err) { 824 dev_err(hwc->dev, "HWC: Failed to post send WQE: %d\n", err); 825 goto out; 826 } 827 828 if (!wait_for_completion_timeout(&ctx->comp_event, 30 * HZ)) { 829 dev_err(hwc->dev, "HWC: Request timed out!\n"); 830 err = -ETIMEDOUT; 831 goto out; 832 } 833 834 if (ctx->error) { 835 err = ctx->error; 836 goto out; 837 } 838 839 if (ctx->status_code && ctx->status_code != GDMA_STATUS_MORE_ENTRIES) { 840 dev_err(hwc->dev, "HWC: Failed hw_channel req: 0x%x\n", 841 ctx->status_code); 842 err = -EPROTO; 843 goto out; 844 } 845 out: 846 mana_hwc_put_msg_index(hwc, msg_id); 847 return err; 848 } 849