1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2020-2024 Intel Corporation 4 */ 5 6 #include <linux/genalloc.h> 7 #include <linux/highmem.h> 8 #include <linux/pm_runtime.h> 9 #include <linux/wait.h> 10 11 #include "ivpu_drv.h" 12 #include "ivpu_gem.h" 13 #include "ivpu_hw.h" 14 #include "ivpu_hw_reg_io.h" 15 #include "ivpu_ipc.h" 16 #include "ivpu_jsm_msg.h" 17 #include "ivpu_pm.h" 18 #include "ivpu_trace.h" 19 20 #define IPC_MAX_RX_MSG 128 21 22 struct ivpu_ipc_tx_buf { 23 struct ivpu_ipc_hdr ipc; 24 struct vpu_jsm_msg jsm; 25 }; 26 27 static void ivpu_ipc_msg_dump(struct ivpu_device *vdev, char *c, 28 struct ivpu_ipc_hdr *ipc_hdr, u32 vpu_addr) 29 { 30 ivpu_dbg(vdev, IPC, 31 "%s: vpu:0x%x (data_addr:0x%08x, data_size:0x%x, channel:0x%x, src_node:0x%x, dst_node:0x%x, status:0x%x)", 32 c, vpu_addr, ipc_hdr->data_addr, ipc_hdr->data_size, ipc_hdr->channel, 33 ipc_hdr->src_node, ipc_hdr->dst_node, ipc_hdr->status); 34 } 35 36 static void ivpu_jsm_msg_dump(struct ivpu_device *vdev, char *c, 37 struct vpu_jsm_msg *jsm_msg, u32 vpu_addr) 38 { 39 u32 *payload = (u32 *)&jsm_msg->payload; 40 41 ivpu_dbg(vdev, JSM, 42 "%s: vpu:0x%08x (type:%s, status:0x%x, id: 0x%x, result: 0x%x, payload:0x%x 0x%x 0x%x 0x%x 0x%x)\n", 43 c, vpu_addr, ivpu_jsm_msg_type_to_str(jsm_msg->type), 44 jsm_msg->status, jsm_msg->request_id, jsm_msg->result, 45 payload[0], payload[1], payload[2], payload[3], payload[4]); 46 } 47 48 static void 49 ivpu_ipc_rx_mark_free(struct ivpu_device *vdev, struct ivpu_ipc_hdr *ipc_hdr, 50 struct vpu_jsm_msg *jsm_msg) 51 { 52 ipc_hdr->status = IVPU_IPC_HDR_FREE; 53 if (jsm_msg) 54 jsm_msg->status = VPU_JSM_MSG_FREE; 55 wmb(); /* Flush WC buffers for message statuses */ 56 } 57 58 static void ivpu_ipc_mem_fini(struct ivpu_device *vdev) 59 { 60 struct ivpu_ipc_info *ipc = vdev->ipc; 61 62 ivpu_bo_free(ipc->mem_rx); 63 ivpu_bo_free(ipc->mem_tx); 64 } 65 66 static int 67 ivpu_ipc_tx_prepare(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons, 68 struct vpu_jsm_msg *req) 69 { 70 struct ivpu_ipc_info *ipc = vdev->ipc; 71 struct ivpu_ipc_tx_buf *tx_buf; 72 u32 tx_buf_vpu_addr; 73 u32 jsm_vpu_addr; 74 75 tx_buf_vpu_addr = gen_pool_alloc(ipc->mm_tx, sizeof(*tx_buf)); 76 if (!tx_buf_vpu_addr) { 77 ivpu_err_ratelimited(vdev, "Failed to reserve IPC buffer, size %ld\n", 78 sizeof(*tx_buf)); 79 return -ENOMEM; 80 } 81 82 tx_buf = ivpu_to_cpu_addr(ipc->mem_tx, tx_buf_vpu_addr); 83 if (drm_WARN_ON(&vdev->drm, !tx_buf)) { 84 gen_pool_free(ipc->mm_tx, tx_buf_vpu_addr, sizeof(*tx_buf)); 85 return -EIO; 86 } 87 88 jsm_vpu_addr = tx_buf_vpu_addr + offsetof(struct ivpu_ipc_tx_buf, jsm); 89 90 if (tx_buf->ipc.status != IVPU_IPC_HDR_FREE) 91 ivpu_warn_ratelimited(vdev, "IPC message vpu:0x%x not released by firmware\n", 92 tx_buf_vpu_addr); 93 94 if (tx_buf->jsm.status != VPU_JSM_MSG_FREE) 95 ivpu_warn_ratelimited(vdev, "JSM message vpu:0x%x not released by firmware\n", 96 jsm_vpu_addr); 97 98 memset(tx_buf, 0, sizeof(*tx_buf)); 99 tx_buf->ipc.data_addr = jsm_vpu_addr; 100 /* TODO: Set data_size to actual JSM message size, not union of all messages */ 101 tx_buf->ipc.data_size = sizeof(*req); 102 tx_buf->ipc.channel = cons->channel; 103 tx_buf->ipc.src_node = 0; 104 tx_buf->ipc.dst_node = 1; 105 tx_buf->ipc.status = IVPU_IPC_HDR_ALLOCATED; 106 tx_buf->jsm.type = req->type; 107 tx_buf->jsm.status = VPU_JSM_MSG_ALLOCATED; 108 tx_buf->jsm.payload = req->payload; 109 110 req->request_id = atomic_inc_return(&ipc->request_id); 111 tx_buf->jsm.request_id = req->request_id; 112 cons->request_id = req->request_id; 113 wmb(); /* Flush WC buffers for IPC, JSM msgs */ 114 115 cons->tx_vpu_addr = tx_buf_vpu_addr; 116 117 ivpu_jsm_msg_dump(vdev, "TX", &tx_buf->jsm, jsm_vpu_addr); 118 ivpu_ipc_msg_dump(vdev, "TX", &tx_buf->ipc, tx_buf_vpu_addr); 119 120 return 0; 121 } 122 123 static void ivpu_ipc_tx_release(struct ivpu_device *vdev, u32 vpu_addr) 124 { 125 struct ivpu_ipc_info *ipc = vdev->ipc; 126 127 if (vpu_addr) 128 gen_pool_free(ipc->mm_tx, vpu_addr, sizeof(struct ivpu_ipc_tx_buf)); 129 } 130 131 static void ivpu_ipc_tx(struct ivpu_device *vdev, u32 vpu_addr) 132 { 133 ivpu_hw_ipc_tx_set(vdev, vpu_addr); 134 } 135 136 static void 137 ivpu_ipc_rx_msg_add(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons, 138 struct ivpu_ipc_hdr *ipc_hdr, struct vpu_jsm_msg *jsm_msg) 139 { 140 struct ivpu_ipc_info *ipc = vdev->ipc; 141 struct ivpu_ipc_rx_msg *rx_msg; 142 143 lockdep_assert_held(&ipc->cons_lock); 144 lockdep_assert_irqs_disabled(); 145 146 rx_msg = kzalloc(sizeof(*rx_msg), GFP_ATOMIC); 147 if (!rx_msg) { 148 ivpu_ipc_rx_mark_free(vdev, ipc_hdr, jsm_msg); 149 return; 150 } 151 152 atomic_inc(&ipc->rx_msg_count); 153 154 rx_msg->ipc_hdr = ipc_hdr; 155 rx_msg->jsm_msg = jsm_msg; 156 rx_msg->callback = cons->rx_callback; 157 158 if (rx_msg->callback) { 159 list_add_tail(&rx_msg->link, &ipc->cb_msg_list); 160 } else { 161 spin_lock(&cons->rx_lock); 162 list_add_tail(&rx_msg->link, &cons->rx_msg_list); 163 spin_unlock(&cons->rx_lock); 164 wake_up(&cons->rx_msg_wq); 165 } 166 } 167 168 static void 169 ivpu_ipc_rx_msg_del(struct ivpu_device *vdev, struct ivpu_ipc_rx_msg *rx_msg) 170 { 171 list_del(&rx_msg->link); 172 ivpu_ipc_rx_mark_free(vdev, rx_msg->ipc_hdr, rx_msg->jsm_msg); 173 atomic_dec(&vdev->ipc->rx_msg_count); 174 kfree(rx_msg); 175 } 176 177 void ivpu_ipc_consumer_add(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons, 178 u32 channel, ivpu_ipc_rx_callback_t rx_callback) 179 { 180 struct ivpu_ipc_info *ipc = vdev->ipc; 181 182 INIT_LIST_HEAD(&cons->link); 183 cons->channel = channel; 184 cons->tx_vpu_addr = 0; 185 cons->request_id = 0; 186 cons->aborted = false; 187 cons->rx_callback = rx_callback; 188 spin_lock_init(&cons->rx_lock); 189 INIT_LIST_HEAD(&cons->rx_msg_list); 190 init_waitqueue_head(&cons->rx_msg_wq); 191 192 spin_lock_irq(&ipc->cons_lock); 193 list_add_tail(&cons->link, &ipc->cons_list); 194 spin_unlock_irq(&ipc->cons_lock); 195 } 196 197 void ivpu_ipc_consumer_del(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons) 198 { 199 struct ivpu_ipc_info *ipc = vdev->ipc; 200 struct ivpu_ipc_rx_msg *rx_msg, *r; 201 202 spin_lock_irq(&ipc->cons_lock); 203 list_del(&cons->link); 204 spin_unlock_irq(&ipc->cons_lock); 205 206 spin_lock_irq(&cons->rx_lock); 207 list_for_each_entry_safe(rx_msg, r, &cons->rx_msg_list, link) 208 ivpu_ipc_rx_msg_del(vdev, rx_msg); 209 spin_unlock_irq(&cons->rx_lock); 210 211 ivpu_ipc_tx_release(vdev, cons->tx_vpu_addr); 212 } 213 214 int ivpu_ipc_send(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons, struct vpu_jsm_msg *req) 215 { 216 struct ivpu_ipc_info *ipc = vdev->ipc; 217 int ret; 218 219 mutex_lock(&ipc->lock); 220 221 if (!ipc->on) { 222 ret = -EAGAIN; 223 goto unlock; 224 } 225 226 ret = ivpu_ipc_tx_prepare(vdev, cons, req); 227 if (ret) 228 goto unlock; 229 230 ivpu_ipc_tx(vdev, cons->tx_vpu_addr); 231 trace_jsm("[tx]", req); 232 233 unlock: 234 mutex_unlock(&ipc->lock); 235 return ret; 236 } 237 238 static bool ivpu_ipc_rx_need_wakeup(struct ivpu_ipc_consumer *cons) 239 { 240 bool ret; 241 242 spin_lock_irq(&cons->rx_lock); 243 ret = !list_empty(&cons->rx_msg_list) || cons->aborted; 244 spin_unlock_irq(&cons->rx_lock); 245 246 return ret; 247 } 248 249 int ivpu_ipc_receive(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons, 250 struct ivpu_ipc_hdr *ipc_buf, 251 struct vpu_jsm_msg *jsm_msg, unsigned long timeout_ms) 252 { 253 struct ivpu_ipc_rx_msg *rx_msg; 254 int wait_ret, ret = 0; 255 256 if (drm_WARN_ONCE(&vdev->drm, cons->rx_callback, "Consumer works only in async mode\n")) 257 return -EINVAL; 258 259 wait_ret = wait_event_timeout(cons->rx_msg_wq, 260 ivpu_ipc_rx_need_wakeup(cons), 261 msecs_to_jiffies(timeout_ms)); 262 263 if (wait_ret == 0) 264 return -ETIMEDOUT; 265 266 spin_lock_irq(&cons->rx_lock); 267 if (cons->aborted) { 268 spin_unlock_irq(&cons->rx_lock); 269 return -ECANCELED; 270 } 271 rx_msg = list_first_entry_or_null(&cons->rx_msg_list, struct ivpu_ipc_rx_msg, link); 272 if (!rx_msg) { 273 spin_unlock_irq(&cons->rx_lock); 274 return -EAGAIN; 275 } 276 277 if (ipc_buf) 278 memcpy(ipc_buf, rx_msg->ipc_hdr, sizeof(*ipc_buf)); 279 if (rx_msg->jsm_msg) { 280 u32 size = min_t(int, rx_msg->ipc_hdr->data_size, sizeof(*jsm_msg)); 281 282 if (rx_msg->jsm_msg->result != VPU_JSM_STATUS_SUCCESS) { 283 ivpu_err(vdev, "IPC resp result error: %d\n", rx_msg->jsm_msg->result); 284 ret = -EBADMSG; 285 } 286 287 if (jsm_msg) 288 memcpy(jsm_msg, rx_msg->jsm_msg, size); 289 trace_jsm("[rx]", rx_msg->jsm_msg); 290 } 291 292 ivpu_ipc_rx_msg_del(vdev, rx_msg); 293 spin_unlock_irq(&cons->rx_lock); 294 return ret; 295 } 296 297 int 298 ivpu_ipc_send_receive_internal(struct ivpu_device *vdev, struct vpu_jsm_msg *req, 299 enum vpu_ipc_msg_type expected_resp_type, 300 struct vpu_jsm_msg *resp, u32 channel, unsigned long timeout_ms) 301 { 302 struct ivpu_ipc_consumer cons; 303 int ret; 304 305 drm_WARN_ON(&vdev->drm, pm_runtime_status_suspended(vdev->drm.dev) && 306 pm_runtime_enabled(vdev->drm.dev)); 307 308 ivpu_ipc_consumer_add(vdev, &cons, channel, NULL); 309 310 ret = ivpu_ipc_send(vdev, &cons, req); 311 if (ret) { 312 ivpu_warn_ratelimited(vdev, "IPC send failed: %d\n", ret); 313 goto consumer_del; 314 } 315 316 ret = ivpu_ipc_receive(vdev, &cons, NULL, resp, timeout_ms); 317 if (ret) { 318 ivpu_warn_ratelimited(vdev, "IPC receive failed: type %s, ret %d\n", 319 ivpu_jsm_msg_type_to_str(req->type), ret); 320 goto consumer_del; 321 } 322 323 if (resp->type != expected_resp_type) { 324 ivpu_warn_ratelimited(vdev, "Invalid JSM response type: 0x%x\n", resp->type); 325 ret = -EBADE; 326 } 327 328 consumer_del: 329 ivpu_ipc_consumer_del(vdev, &cons); 330 return ret; 331 } 332 333 int ivpu_ipc_send_receive(struct ivpu_device *vdev, struct vpu_jsm_msg *req, 334 enum vpu_ipc_msg_type expected_resp, struct vpu_jsm_msg *resp, 335 u32 channel, unsigned long timeout_ms) 336 { 337 struct vpu_jsm_msg hb_req = { .type = VPU_JSM_MSG_QUERY_ENGINE_HB }; 338 struct vpu_jsm_msg hb_resp; 339 int ret, hb_ret; 340 341 ret = ivpu_rpm_get(vdev); 342 if (ret < 0) 343 return ret; 344 345 ret = ivpu_ipc_send_receive_internal(vdev, req, expected_resp, resp, channel, timeout_ms); 346 if (ret != -ETIMEDOUT) 347 goto rpm_put; 348 349 hb_ret = ivpu_ipc_send_receive_internal(vdev, &hb_req, VPU_JSM_MSG_QUERY_ENGINE_HB_DONE, 350 &hb_resp, VPU_IPC_CHAN_ASYNC_CMD, 351 vdev->timeout.jsm); 352 if (hb_ret == -ETIMEDOUT) 353 ivpu_pm_trigger_recovery(vdev, "IPC timeout"); 354 355 rpm_put: 356 ivpu_rpm_put(vdev); 357 return ret; 358 } 359 360 int ivpu_ipc_send_and_wait(struct ivpu_device *vdev, struct vpu_jsm_msg *req, 361 u32 channel, unsigned long timeout_ms) 362 { 363 struct ivpu_ipc_consumer cons; 364 int ret; 365 366 ret = ivpu_rpm_get(vdev); 367 if (ret < 0) 368 return ret; 369 370 ivpu_ipc_consumer_add(vdev, &cons, channel, NULL); 371 372 ret = ivpu_ipc_send(vdev, &cons, req); 373 if (ret) { 374 ivpu_warn_ratelimited(vdev, "IPC send failed: %d\n", ret); 375 goto consumer_del; 376 } 377 378 msleep(timeout_ms); 379 380 consumer_del: 381 ivpu_ipc_consumer_del(vdev, &cons); 382 ivpu_rpm_put(vdev); 383 return ret; 384 } 385 386 static bool 387 ivpu_ipc_match_consumer(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons, 388 struct ivpu_ipc_hdr *ipc_hdr, struct vpu_jsm_msg *jsm_msg) 389 { 390 if (cons->channel != ipc_hdr->channel) 391 return false; 392 393 if (!jsm_msg || jsm_msg->request_id == cons->request_id) 394 return true; 395 396 return false; 397 } 398 399 void ivpu_ipc_irq_handler(struct ivpu_device *vdev) 400 { 401 struct ivpu_ipc_info *ipc = vdev->ipc; 402 struct ivpu_ipc_consumer *cons; 403 struct ivpu_ipc_hdr *ipc_hdr; 404 struct vpu_jsm_msg *jsm_msg; 405 unsigned long flags; 406 bool dispatched; 407 u32 vpu_addr; 408 409 /* 410 * Driver needs to purge all messages from IPC FIFO to clear IPC interrupt. 411 * Without purge IPC FIFO to 0 next IPC interrupts won't be generated. 412 */ 413 while (ivpu_hw_ipc_rx_count_get(vdev)) { 414 vpu_addr = ivpu_hw_ipc_rx_addr_get(vdev); 415 if (vpu_addr == REG_IO_ERROR) { 416 ivpu_err_ratelimited(vdev, "Failed to read IPC rx addr register\n"); 417 return; 418 } 419 420 ipc_hdr = ivpu_to_cpu_addr(ipc->mem_rx, vpu_addr); 421 if (!ipc_hdr) { 422 ivpu_warn_ratelimited(vdev, "IPC msg 0x%x out of range\n", vpu_addr); 423 continue; 424 } 425 ivpu_ipc_msg_dump(vdev, "RX", ipc_hdr, vpu_addr); 426 427 jsm_msg = NULL; 428 if (ipc_hdr->channel != IVPU_IPC_CHAN_BOOT_MSG) { 429 jsm_msg = ivpu_to_cpu_addr(ipc->mem_rx, ipc_hdr->data_addr); 430 if (!jsm_msg) { 431 ivpu_warn_ratelimited(vdev, "JSM msg 0x%x out of range\n", 432 ipc_hdr->data_addr); 433 ivpu_ipc_rx_mark_free(vdev, ipc_hdr, NULL); 434 continue; 435 } 436 ivpu_jsm_msg_dump(vdev, "RX", jsm_msg, ipc_hdr->data_addr); 437 } 438 439 if (atomic_read(&ipc->rx_msg_count) > IPC_MAX_RX_MSG) { 440 ivpu_warn_ratelimited(vdev, "IPC RX msg dropped, msg count %d\n", 441 IPC_MAX_RX_MSG); 442 ivpu_ipc_rx_mark_free(vdev, ipc_hdr, jsm_msg); 443 continue; 444 } 445 446 dispatched = false; 447 spin_lock_irqsave(&ipc->cons_lock, flags); 448 list_for_each_entry(cons, &ipc->cons_list, link) { 449 if (ivpu_ipc_match_consumer(vdev, cons, ipc_hdr, jsm_msg)) { 450 ivpu_ipc_rx_msg_add(vdev, cons, ipc_hdr, jsm_msg); 451 dispatched = true; 452 break; 453 } 454 } 455 spin_unlock_irqrestore(&ipc->cons_lock, flags); 456 457 if (!dispatched) { 458 ivpu_dbg(vdev, IPC, "IPC RX msg 0x%x dropped (no consumer)\n", vpu_addr); 459 ivpu_ipc_rx_mark_free(vdev, ipc_hdr, jsm_msg); 460 } 461 } 462 463 queue_work(system_wq, &vdev->irq_ipc_work); 464 } 465 466 void ivpu_ipc_irq_work_fn(struct work_struct *work) 467 { 468 struct ivpu_device *vdev = container_of(work, struct ivpu_device, irq_ipc_work); 469 struct ivpu_ipc_info *ipc = vdev->ipc; 470 struct ivpu_ipc_rx_msg *rx_msg, *r; 471 struct list_head cb_msg_list; 472 473 INIT_LIST_HEAD(&cb_msg_list); 474 475 spin_lock_irq(&ipc->cons_lock); 476 list_splice_tail_init(&ipc->cb_msg_list, &cb_msg_list); 477 spin_unlock_irq(&ipc->cons_lock); 478 479 list_for_each_entry_safe(rx_msg, r, &cb_msg_list, link) { 480 rx_msg->callback(vdev, rx_msg->ipc_hdr, rx_msg->jsm_msg); 481 ivpu_ipc_rx_msg_del(vdev, rx_msg); 482 } 483 } 484 485 int ivpu_ipc_init(struct ivpu_device *vdev) 486 { 487 struct ivpu_ipc_info *ipc = vdev->ipc; 488 int ret; 489 490 ipc->mem_tx = ivpu_bo_create_global(vdev, SZ_16K, DRM_IVPU_BO_WC | DRM_IVPU_BO_MAPPABLE); 491 if (!ipc->mem_tx) { 492 ivpu_err(vdev, "Failed to allocate mem_tx\n"); 493 return -ENOMEM; 494 } 495 496 ipc->mem_rx = ivpu_bo_create_global(vdev, SZ_16K, DRM_IVPU_BO_WC | DRM_IVPU_BO_MAPPABLE); 497 if (!ipc->mem_rx) { 498 ivpu_err(vdev, "Failed to allocate mem_rx\n"); 499 ret = -ENOMEM; 500 goto err_free_tx; 501 } 502 503 ipc->mm_tx = devm_gen_pool_create(vdev->drm.dev, __ffs(IVPU_IPC_ALIGNMENT), 504 -1, "TX_IPC_JSM"); 505 if (IS_ERR(ipc->mm_tx)) { 506 ret = PTR_ERR(ipc->mm_tx); 507 ivpu_err(vdev, "Failed to create gen pool, %pe\n", ipc->mm_tx); 508 goto err_free_rx; 509 } 510 511 ret = gen_pool_add(ipc->mm_tx, ipc->mem_tx->vpu_addr, ivpu_bo_size(ipc->mem_tx), -1); 512 if (ret) { 513 ivpu_err(vdev, "gen_pool_add failed, ret %d\n", ret); 514 goto err_free_rx; 515 } 516 517 spin_lock_init(&ipc->cons_lock); 518 INIT_LIST_HEAD(&ipc->cons_list); 519 INIT_LIST_HEAD(&ipc->cb_msg_list); 520 ret = drmm_mutex_init(&vdev->drm, &ipc->lock); 521 if (ret) { 522 ivpu_err(vdev, "Failed to initialize ipc->lock, ret %d\n", ret); 523 goto err_free_rx; 524 } 525 ivpu_ipc_reset(vdev); 526 return 0; 527 528 err_free_rx: 529 ivpu_bo_free(ipc->mem_rx); 530 err_free_tx: 531 ivpu_bo_free(ipc->mem_tx); 532 return ret; 533 } 534 535 void ivpu_ipc_fini(struct ivpu_device *vdev) 536 { 537 struct ivpu_ipc_info *ipc = vdev->ipc; 538 539 drm_WARN_ON(&vdev->drm, !list_empty(&ipc->cons_list)); 540 drm_WARN_ON(&vdev->drm, !list_empty(&ipc->cb_msg_list)); 541 drm_WARN_ON(&vdev->drm, atomic_read(&ipc->rx_msg_count) > 0); 542 543 ivpu_ipc_mem_fini(vdev); 544 } 545 546 void ivpu_ipc_enable(struct ivpu_device *vdev) 547 { 548 struct ivpu_ipc_info *ipc = vdev->ipc; 549 550 mutex_lock(&ipc->lock); 551 ipc->on = true; 552 mutex_unlock(&ipc->lock); 553 } 554 555 void ivpu_ipc_disable(struct ivpu_device *vdev) 556 { 557 struct ivpu_ipc_info *ipc = vdev->ipc; 558 struct ivpu_ipc_consumer *cons, *c; 559 struct ivpu_ipc_rx_msg *rx_msg, *r; 560 561 drm_WARN_ON(&vdev->drm, !list_empty(&ipc->cb_msg_list)); 562 563 mutex_lock(&ipc->lock); 564 ipc->on = false; 565 mutex_unlock(&ipc->lock); 566 567 spin_lock_irq(&ipc->cons_lock); 568 list_for_each_entry_safe(cons, c, &ipc->cons_list, link) { 569 spin_lock(&cons->rx_lock); 570 if (!cons->rx_callback) 571 cons->aborted = true; 572 list_for_each_entry_safe(rx_msg, r, &cons->rx_msg_list, link) 573 ivpu_ipc_rx_msg_del(vdev, rx_msg); 574 spin_unlock(&cons->rx_lock); 575 wake_up(&cons->rx_msg_wq); 576 } 577 spin_unlock_irq(&ipc->cons_lock); 578 579 drm_WARN_ON(&vdev->drm, atomic_read(&ipc->rx_msg_count) > 0); 580 } 581 582 void ivpu_ipc_reset(struct ivpu_device *vdev) 583 { 584 struct ivpu_ipc_info *ipc = vdev->ipc; 585 586 mutex_lock(&ipc->lock); 587 drm_WARN_ON(&vdev->drm, ipc->on); 588 589 memset(ivpu_bo_vaddr(ipc->mem_tx), 0, ivpu_bo_size(ipc->mem_tx)); 590 memset(ivpu_bo_vaddr(ipc->mem_rx), 0, ivpu_bo_size(ipc->mem_rx)); 591 wmb(); /* Flush WC buffers for TX and RX rings */ 592 593 mutex_unlock(&ipc->lock); 594 } 595