1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) 2020-2023 Intel Corporation
22 	struct ivpu_ipc_hdr ipc;  member
29 	ivpu_dbg(vdev, IPC,  in ivpu_ipc_msg_dump()
31 		 c, vpu_addr, ipc_hdr->data_addr, ipc_hdr->data_size, ipc_hdr->channel,  in ivpu_ipc_msg_dump()
32 		 ipc_hdr->src_node, ipc_hdr->dst_node, ipc_hdr->status);  in ivpu_ipc_msg_dump()
38 	u32 *payload = (u32 *)&jsm_msg->payload;  in ivpu_jsm_msg_dump()
42 		 c, vpu_addr, ivpu_jsm_msg_type_to_str(jsm_msg->type),  in ivpu_jsm_msg_dump()
43 		 jsm_msg->status, jsm_msg->request_id, jsm_msg->result,  in ivpu_jsm_msg_dump()
51 	ipc_hdr->status = IVPU_IPC_HDR_FREE;  in ivpu_ipc_rx_mark_free()
53 		jsm_msg->status = VPU_JSM_MSG_FREE;  in ivpu_ipc_rx_mark_free()
59 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_mem_fini()  local
61 	ivpu_bo_free_internal(ipc->mem_rx);  in ivpu_ipc_mem_fini()
62 	ivpu_bo_free_internal(ipc->mem_tx);  in ivpu_ipc_mem_fini()
69 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_tx_prepare()  local
74 	tx_buf_vpu_addr = gen_pool_alloc(ipc->mm_tx, sizeof(*tx_buf));  in ivpu_ipc_tx_prepare()
76 		ivpu_err_ratelimited(vdev, "Failed to reserve IPC buffer, size %ld\n",  in ivpu_ipc_tx_prepare()
78 		return -ENOMEM;  in ivpu_ipc_tx_prepare()
81 	tx_buf = ivpu_to_cpu_addr(ipc->mem_tx, tx_buf_vpu_addr);  in ivpu_ipc_tx_prepare()
82 	if (drm_WARN_ON(&vdev->drm, !tx_buf)) {  in ivpu_ipc_tx_prepare()
83 		gen_pool_free(ipc->mm_tx, tx_buf_vpu_addr, sizeof(*tx_buf));  in ivpu_ipc_tx_prepare()
84 		return -EIO;  in ivpu_ipc_tx_prepare()
89 	if (tx_buf->ipc.status != IVPU_IPC_HDR_FREE)  in ivpu_ipc_tx_prepare()
90 		ivpu_warn_ratelimited(vdev, "IPC message vpu:0x%x not released by firmware\n",  in ivpu_ipc_tx_prepare()
93 	if (tx_buf->jsm.status != VPU_JSM_MSG_FREE)  in ivpu_ipc_tx_prepare()
98 	tx_buf->ipc.data_addr = jsm_vpu_addr;  in ivpu_ipc_tx_prepare()
100 	tx_buf->ipc.data_size = sizeof(*req);  in ivpu_ipc_tx_prepare()
101 	tx_buf->ipc.channel = cons->channel;  in ivpu_ipc_tx_prepare()
102 	tx_buf->ipc.src_node = 0;  in ivpu_ipc_tx_prepare()
103 	tx_buf->ipc.dst_node = 1;  in ivpu_ipc_tx_prepare()
104 	tx_buf->ipc.status = IVPU_IPC_HDR_ALLOCATED;  in ivpu_ipc_tx_prepare()
105 	tx_buf->jsm.type = req->type;  in ivpu_ipc_tx_prepare()
106 	tx_buf->jsm.status = VPU_JSM_MSG_ALLOCATED;  in ivpu_ipc_tx_prepare()
107 	tx_buf->jsm.payload = req->payload;  in ivpu_ipc_tx_prepare()
109 	req->request_id = atomic_inc_return(&ipc->request_id);  in ivpu_ipc_tx_prepare()
110 	tx_buf->jsm.request_id = req->request_id;  in ivpu_ipc_tx_prepare()
111 	cons->request_id = req->request_id;  in ivpu_ipc_tx_prepare()
112 	wmb(); /* Flush WC buffers for IPC, JSM msgs */  in ivpu_ipc_tx_prepare()
114 	cons->tx_vpu_addr = tx_buf_vpu_addr;  in ivpu_ipc_tx_prepare()
116 	ivpu_jsm_msg_dump(vdev, "TX", &tx_buf->jsm, jsm_vpu_addr);  in ivpu_ipc_tx_prepare()
117 	ivpu_ipc_msg_dump(vdev, "TX", &tx_buf->ipc, tx_buf_vpu_addr);  in ivpu_ipc_tx_prepare()
124 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_tx_release()  local
127 		gen_pool_free(ipc->mm_tx, vpu_addr, sizeof(struct ivpu_ipc_tx_buf));  in ivpu_ipc_tx_release()
139 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_rx_msg_add()  local
142 	lockdep_assert_held(&ipc->cons_lock);  in ivpu_ipc_rx_msg_add()
151 	atomic_inc(&ipc->rx_msg_count);  in ivpu_ipc_rx_msg_add()
153 	rx_msg->ipc_hdr = ipc_hdr;  in ivpu_ipc_rx_msg_add()
154 	rx_msg->jsm_msg = jsm_msg;  in ivpu_ipc_rx_msg_add()
155 	rx_msg->callback = cons->rx_callback;  in ivpu_ipc_rx_msg_add()
157 	if (rx_msg->callback) {  in ivpu_ipc_rx_msg_add()
158 		list_add_tail(&rx_msg->link, &ipc->cb_msg_list);  in ivpu_ipc_rx_msg_add()
160 		spin_lock(&cons->rx_lock);  in ivpu_ipc_rx_msg_add()
161 		list_add_tail(&rx_msg->link, &cons->rx_msg_list);  in ivpu_ipc_rx_msg_add()
162 		spin_unlock(&cons->rx_lock);  in ivpu_ipc_rx_msg_add()
163 		wake_up(&cons->rx_msg_wq);  in ivpu_ipc_rx_msg_add()
170 	list_del(&rx_msg->link);  in ivpu_ipc_rx_msg_del()
171 	ivpu_ipc_rx_mark_free(vdev, rx_msg->ipc_hdr, rx_msg->jsm_msg);  in ivpu_ipc_rx_msg_del()
172 	atomic_dec(&vdev->ipc->rx_msg_count);  in ivpu_ipc_rx_msg_del()
179 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_consumer_add()  local
181 	INIT_LIST_HEAD(&cons->link);  in ivpu_ipc_consumer_add()
182 	cons->channel = channel;  in ivpu_ipc_consumer_add()
183 	cons->tx_vpu_addr = 0;  in ivpu_ipc_consumer_add()
184 	cons->request_id = 0;  in ivpu_ipc_consumer_add()
185 	cons->aborted = false;  in ivpu_ipc_consumer_add()
186 	cons->rx_callback = rx_callback;  in ivpu_ipc_consumer_add()
187 	spin_lock_init(&cons->rx_lock);  in ivpu_ipc_consumer_add()
188 	INIT_LIST_HEAD(&cons->rx_msg_list);  in ivpu_ipc_consumer_add()
189 	init_waitqueue_head(&cons->rx_msg_wq);  in ivpu_ipc_consumer_add()
191 	spin_lock_irq(&ipc->cons_lock);  in ivpu_ipc_consumer_add()
192 	list_add_tail(&cons->link, &ipc->cons_list);  in ivpu_ipc_consumer_add()
193 	spin_unlock_irq(&ipc->cons_lock);  in ivpu_ipc_consumer_add()
198 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_consumer_del()  local
201 	spin_lock_irq(&ipc->cons_lock);  in ivpu_ipc_consumer_del()
202 	list_del(&cons->link);  in ivpu_ipc_consumer_del()
203 	spin_unlock_irq(&ipc->cons_lock);  in ivpu_ipc_consumer_del()
205 	spin_lock_irq(&cons->rx_lock);  in ivpu_ipc_consumer_del()
206 	list_for_each_entry_safe(rx_msg, r, &cons->rx_msg_list, link)  in ivpu_ipc_consumer_del()
208 	spin_unlock_irq(&cons->rx_lock);  in ivpu_ipc_consumer_del()
210 	ivpu_ipc_tx_release(vdev, cons->tx_vpu_addr);  in ivpu_ipc_consumer_del()
216 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_send()  local
219 	mutex_lock(&ipc->lock);  in ivpu_ipc_send()
221 	if (!ipc->on) {  in ivpu_ipc_send()
222 		ret = -EAGAIN;  in ivpu_ipc_send()
230 	ivpu_ipc_tx(vdev, cons->tx_vpu_addr);  in ivpu_ipc_send()
233 	mutex_unlock(&ipc->lock);  in ivpu_ipc_send()
241 	spin_lock_irq(&cons->rx_lock);  in ivpu_ipc_rx_need_wakeup()
242 	ret = !list_empty(&cons->rx_msg_list) || cons->aborted;  in ivpu_ipc_rx_need_wakeup()
243 	spin_unlock_irq(&cons->rx_lock);  in ivpu_ipc_rx_need_wakeup()
255 	if (drm_WARN_ONCE(&vdev->drm, cons->rx_callback, "Consumer works only in async mode\n"))  in ivpu_ipc_receive()
256 		return -EINVAL;  in ivpu_ipc_receive()
258 	wait_ret = wait_event_timeout(cons->rx_msg_wq,  in ivpu_ipc_receive()
263 		return -ETIMEDOUT;  in ivpu_ipc_receive()
265 	spin_lock_irq(&cons->rx_lock);  in ivpu_ipc_receive()
266 	if (cons->aborted) {  in ivpu_ipc_receive()
267 		spin_unlock_irq(&cons->rx_lock);  in ivpu_ipc_receive()
268 		return -ECANCELED;  in ivpu_ipc_receive()
270 	rx_msg = list_first_entry_or_null(&cons->rx_msg_list, struct ivpu_ipc_rx_msg, link);  in ivpu_ipc_receive()
272 		spin_unlock_irq(&cons->rx_lock);  in ivpu_ipc_receive()
273 		return -EAGAIN;  in ivpu_ipc_receive()
277 		memcpy(ipc_buf, rx_msg->ipc_hdr, sizeof(*ipc_buf));  in ivpu_ipc_receive()
278 	if (rx_msg->jsm_msg) {  in ivpu_ipc_receive()
279 		u32 size = min_t(int, rx_msg->ipc_hdr->data_size, sizeof(*jsm_msg));  in ivpu_ipc_receive()
281 		if (rx_msg->jsm_msg->result != VPU_JSM_STATUS_SUCCESS) {  in ivpu_ipc_receive()
282 			ivpu_dbg(vdev, IPC, "IPC resp result error: %d\n", rx_msg->jsm_msg->result);  in ivpu_ipc_receive()
283 			ret = -EBADMSG;  in ivpu_ipc_receive()
287 			memcpy(jsm_msg, rx_msg->jsm_msg, size);  in ivpu_ipc_receive()
291 	spin_unlock_irq(&cons->rx_lock);  in ivpu_ipc_receive()
308 		ivpu_warn_ratelimited(vdev, "IPC send failed: %d\n", ret);  in ivpu_ipc_send_receive_internal()
314 		ivpu_warn_ratelimited(vdev, "IPC receive failed: type %s, ret %d\n",  in ivpu_ipc_send_receive_internal()
315 				      ivpu_jsm_msg_type_to_str(req->type), ret);  in ivpu_ipc_send_receive_internal()
319 	if (resp->type != expected_resp_type) {  in ivpu_ipc_send_receive_internal()
320 		ivpu_warn_ratelimited(vdev, "Invalid JSM response type: 0x%x\n", resp->type);  in ivpu_ipc_send_receive_internal()
321 		ret = -EBADE;  in ivpu_ipc_send_receive_internal()
337 	drm_WARN_ON(&vdev->drm, pm_runtime_status_suspended(vdev->drm.dev));  in ivpu_ipc_send_receive_active()
340 	if (ret != -ETIMEDOUT)  in ivpu_ipc_send_receive_active()
345 						vdev->timeout.jsm);  in ivpu_ipc_send_receive_active()
346 	if (hb_ret == -ETIMEDOUT)  in ivpu_ipc_send_receive_active()
347 		ivpu_pm_trigger_recovery(vdev, "IPC timeout");  in ivpu_ipc_send_receive_active()
372 	if (cons->channel != ipc_hdr->channel)  in ivpu_ipc_match_consumer()
375 	if (!jsm_msg || jsm_msg->request_id == cons->request_id)  in ivpu_ipc_match_consumer()
383 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_irq_handler()  local
392 	 * Driver needs to purge all messages from IPC FIFO to clear IPC interrupt.  in ivpu_ipc_irq_handler()
393 	 * Without purge IPC FIFO to 0 next IPC interrupts won't be generated.  in ivpu_ipc_irq_handler()
398 			ivpu_err_ratelimited(vdev, "Failed to read IPC rx addr register\n");  in ivpu_ipc_irq_handler()
402 		ipc_hdr = ivpu_to_cpu_addr(ipc->mem_rx, vpu_addr);  in ivpu_ipc_irq_handler()
404 			ivpu_warn_ratelimited(vdev, "IPC msg 0x%x out of range\n", vpu_addr);  in ivpu_ipc_irq_handler()
410 		if (ipc_hdr->channel != IVPU_IPC_CHAN_BOOT_MSG) {  in ivpu_ipc_irq_handler()
411 			jsm_msg = ivpu_to_cpu_addr(ipc->mem_rx, ipc_hdr->data_addr);  in ivpu_ipc_irq_handler()
414 						      ipc_hdr->data_addr);  in ivpu_ipc_irq_handler()
418 			ivpu_jsm_msg_dump(vdev, "RX", jsm_msg, ipc_hdr->data_addr);  in ivpu_ipc_irq_handler()
421 		if (atomic_read(&ipc->rx_msg_count) > IPC_MAX_RX_MSG) {  in ivpu_ipc_irq_handler()
422 			ivpu_warn_ratelimited(vdev, "IPC RX msg dropped, msg count %d\n",  in ivpu_ipc_irq_handler()
429 		spin_lock_irqsave(&ipc->cons_lock, flags);  in ivpu_ipc_irq_handler()
430 		list_for_each_entry(cons, &ipc->cons_list, link) {  in ivpu_ipc_irq_handler()
437 		spin_unlock_irqrestore(&ipc->cons_lock, flags);  in ivpu_ipc_irq_handler()
440 			ivpu_dbg(vdev, IPC, "IPC RX msg 0x%x dropped (no consumer)\n", vpu_addr);  in ivpu_ipc_irq_handler()
446 		*wake_thread = !list_empty(&ipc->cb_msg_list);  in ivpu_ipc_irq_handler()
451 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_irq_thread_handler()  local
457 	spin_lock_irq(&ipc->cons_lock);  in ivpu_ipc_irq_thread_handler()
458 	list_splice_tail_init(&ipc->cb_msg_list, &cb_msg_list);  in ivpu_ipc_irq_thread_handler()
459 	spin_unlock_irq(&ipc->cons_lock);  in ivpu_ipc_irq_thread_handler()
462 		rx_msg->callback(vdev, rx_msg->ipc_hdr, rx_msg->jsm_msg);  in ivpu_ipc_irq_thread_handler()
471 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_init()  local
474 	ipc->mem_tx = ivpu_bo_alloc_internal(vdev, 0, SZ_16K, DRM_IVPU_BO_WC);  in ivpu_ipc_init()
475 	if (!ipc->mem_tx) {  in ivpu_ipc_init()
477 		return -ENOMEM;  in ivpu_ipc_init()
480 	ipc->mem_rx = ivpu_bo_alloc_internal(vdev, 0, SZ_16K, DRM_IVPU_BO_WC);  in ivpu_ipc_init()
481 	if (!ipc->mem_rx) {  in ivpu_ipc_init()
483 		ret = -ENOMEM;  in ivpu_ipc_init()
487 	ipc->mm_tx = devm_gen_pool_create(vdev->drm.dev, __ffs(IVPU_IPC_ALIGNMENT),  in ivpu_ipc_init()
488 					  -1, "TX_IPC_JSM");  in ivpu_ipc_init()
489 	if (IS_ERR(ipc->mm_tx)) {  in ivpu_ipc_init()
490 		ret = PTR_ERR(ipc->mm_tx);  in ivpu_ipc_init()
491 		ivpu_err(vdev, "Failed to create gen pool, %pe\n", ipc->mm_tx);  in ivpu_ipc_init()
495 	ret = gen_pool_add(ipc->mm_tx, ipc->mem_tx->vpu_addr, ivpu_bo_size(ipc->mem_tx), -1);  in ivpu_ipc_init()
501 	spin_lock_init(&ipc->cons_lock);  in ivpu_ipc_init()
502 	INIT_LIST_HEAD(&ipc->cons_list);  in ivpu_ipc_init()
503 	INIT_LIST_HEAD(&ipc->cb_msg_list);  in ivpu_ipc_init()
504 	drmm_mutex_init(&vdev->drm, &ipc->lock);  in ivpu_ipc_init()
509 	ivpu_bo_free_internal(ipc->mem_rx);  in ivpu_ipc_init()
511 	ivpu_bo_free_internal(ipc->mem_tx);  in ivpu_ipc_init()
517 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_fini()  local
519 	drm_WARN_ON(&vdev->drm, ipc->on);  in ivpu_ipc_fini()
520 	drm_WARN_ON(&vdev->drm, !list_empty(&ipc->cons_list));  in ivpu_ipc_fini()
521 	drm_WARN_ON(&vdev->drm, !list_empty(&ipc->cb_msg_list));  in ivpu_ipc_fini()
522 	drm_WARN_ON(&vdev->drm, atomic_read(&ipc->rx_msg_count) > 0);  in ivpu_ipc_fini()
529 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_enable()  local
531 	mutex_lock(&ipc->lock);  in ivpu_ipc_enable()
532 	ipc->on = true;  in ivpu_ipc_enable()
533 	mutex_unlock(&ipc->lock);  in ivpu_ipc_enable()
538 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_disable()  local
542 	drm_WARN_ON(&vdev->drm, !list_empty(&ipc->cb_msg_list));  in ivpu_ipc_disable()
544 	mutex_lock(&ipc->lock);  in ivpu_ipc_disable()
545 	ipc->on = false;  in ivpu_ipc_disable()
546 	mutex_unlock(&ipc->lock);  in ivpu_ipc_disable()
548 	spin_lock_irq(&ipc->cons_lock);  in ivpu_ipc_disable()
549 	list_for_each_entry_safe(cons, c, &ipc->cons_list, link) {  in ivpu_ipc_disable()
550 		spin_lock(&cons->rx_lock);  in ivpu_ipc_disable()
551 		if (!cons->rx_callback)  in ivpu_ipc_disable()
552 			cons->aborted = true;  in ivpu_ipc_disable()
553 		list_for_each_entry_safe(rx_msg, r, &cons->rx_msg_list, link)  in ivpu_ipc_disable()
555 		spin_unlock(&cons->rx_lock);  in ivpu_ipc_disable()
556 		wake_up(&cons->rx_msg_wq);  in ivpu_ipc_disable()
558 	spin_unlock_irq(&ipc->cons_lock);  in ivpu_ipc_disable()
560 	drm_WARN_ON(&vdev->drm, atomic_read(&ipc->rx_msg_count) > 0);  in ivpu_ipc_disable()
565 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_reset()  local
567 	mutex_lock(&ipc->lock);  in ivpu_ipc_reset()
568 	drm_WARN_ON(&vdev->drm, ipc->on);  in ivpu_ipc_reset()
570 	memset(ivpu_bo_vaddr(ipc->mem_tx), 0, ivpu_bo_size(ipc->mem_tx));  in ivpu_ipc_reset()
571 	memset(ivpu_bo_vaddr(ipc->mem_rx), 0, ivpu_bo_size(ipc->mem_rx));  in ivpu_ipc_reset()
574 	mutex_unlock(&ipc->lock);  in ivpu_ipc_reset()