1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) 2020-2023 Intel Corporation
20 #define IS_KTHREAD()	(get_current()->flags & PF_KTHREAD)
23 	struct ivpu_ipc_hdr ipc;  member
36 	ivpu_dbg(vdev, IPC,  in ivpu_ipc_msg_dump()
38 		 c, vpu_addr, ipc_hdr->data_addr, ipc_hdr->data_size, ipc_hdr->channel,  in ivpu_ipc_msg_dump()
39 		 ipc_hdr->src_node, ipc_hdr->dst_node, ipc_hdr->status);  in ivpu_ipc_msg_dump()
45 	u32 *payload = (u32 *)&jsm_msg->payload;  in ivpu_jsm_msg_dump()
49 		 c, vpu_addr, jsm_msg->type, jsm_msg->status, jsm_msg->request_id, jsm_msg->result,  in ivpu_jsm_msg_dump()
50 		 payload[0], payload[1], payload[2], payload[3], payload[4]);  in ivpu_jsm_msg_dump()
57 	ipc_hdr->status = IVPU_IPC_HDR_FREE;  in ivpu_ipc_rx_mark_free()
59 		jsm_msg->status = VPU_JSM_MSG_FREE;  in ivpu_ipc_rx_mark_free()
65 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_mem_fini()  local
67 	ivpu_bo_free_internal(ipc->mem_rx);  in ivpu_ipc_mem_fini()
68 	ivpu_bo_free_internal(ipc->mem_tx);  in ivpu_ipc_mem_fini()
75 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_tx_prepare()  local
80 	tx_buf_vpu_addr = gen_pool_alloc(ipc->mm_tx, sizeof(*tx_buf));  in ivpu_ipc_tx_prepare()
82 		ivpu_err(vdev, "Failed to reserve IPC buffer, size %ld\n",  in ivpu_ipc_tx_prepare()
84 		return -ENOMEM;  in ivpu_ipc_tx_prepare()
87 	tx_buf = ivpu_to_cpu_addr(ipc->mem_tx, tx_buf_vpu_addr);  in ivpu_ipc_tx_prepare()
88 	if (drm_WARN_ON(&vdev->drm, !tx_buf)) {  in ivpu_ipc_tx_prepare()
89 		gen_pool_free(ipc->mm_tx, tx_buf_vpu_addr, sizeof(*tx_buf));  in ivpu_ipc_tx_prepare()
90 		return -EIO;  in ivpu_ipc_tx_prepare()
95 	if (tx_buf->ipc.status != IVPU_IPC_HDR_FREE)  in ivpu_ipc_tx_prepare()
96 		ivpu_warn(vdev, "IPC message vpu:0x%x not released by firmware\n",  in ivpu_ipc_tx_prepare()
99 	if (tx_buf->jsm.status != VPU_JSM_MSG_FREE)  in ivpu_ipc_tx_prepare()
104 	tx_buf->ipc.data_addr = jsm_vpu_addr;  in ivpu_ipc_tx_prepare()
106 	tx_buf->ipc.data_size = sizeof(*req);  in ivpu_ipc_tx_prepare()
107 	tx_buf->ipc.channel = cons->channel;  in ivpu_ipc_tx_prepare()
108 	tx_buf->ipc.src_node = 0;  in ivpu_ipc_tx_prepare()
109 	tx_buf->ipc.dst_node = 1;  in ivpu_ipc_tx_prepare()
110 	tx_buf->ipc.status = IVPU_IPC_HDR_ALLOCATED;  in ivpu_ipc_tx_prepare()
111 	tx_buf->jsm.type = req->type;  in ivpu_ipc_tx_prepare()
112 	tx_buf->jsm.status = VPU_JSM_MSG_ALLOCATED;  in ivpu_ipc_tx_prepare()
113 	tx_buf->jsm.payload = req->payload;  in ivpu_ipc_tx_prepare()
115 	req->request_id = atomic_inc_return(&ipc->request_id);  in ivpu_ipc_tx_prepare()
116 	tx_buf->jsm.request_id = req->request_id;  in ivpu_ipc_tx_prepare()
117 	cons->request_id = req->request_id;  in ivpu_ipc_tx_prepare()
118 	wmb(); /* Flush WC buffers for IPC, JSM msgs */  in ivpu_ipc_tx_prepare()
120 	cons->tx_vpu_addr = tx_buf_vpu_addr;  in ivpu_ipc_tx_prepare()
122 	ivpu_jsm_msg_dump(vdev, "TX", &tx_buf->jsm, jsm_vpu_addr);  in ivpu_ipc_tx_prepare()
123 	ivpu_ipc_msg_dump(vdev, "TX", &tx_buf->ipc, tx_buf_vpu_addr);  in ivpu_ipc_tx_prepare()
130 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_tx_release()  local
133 		gen_pool_free(ipc->mm_tx, vpu_addr, sizeof(struct ivpu_ipc_tx_buf));  in ivpu_ipc_tx_release()
144 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_consumer_add()  local
146 	INIT_LIST_HEAD(&cons->link);  in ivpu_ipc_consumer_add()
147 	cons->channel = channel;  in ivpu_ipc_consumer_add()
148 	cons->tx_vpu_addr = 0;  in ivpu_ipc_consumer_add()
149 	cons->request_id = 0;  in ivpu_ipc_consumer_add()
150 	spin_lock_init(&cons->rx_msg_lock);  in ivpu_ipc_consumer_add()
151 	INIT_LIST_HEAD(&cons->rx_msg_list);  in ivpu_ipc_consumer_add()
152 	init_waitqueue_head(&cons->rx_msg_wq);  in ivpu_ipc_consumer_add()
154 	spin_lock_irq(&ipc->cons_list_lock);  in ivpu_ipc_consumer_add()
155 	list_add_tail(&cons->link, &ipc->cons_list);  in ivpu_ipc_consumer_add()
156 	spin_unlock_irq(&ipc->cons_list_lock);  in ivpu_ipc_consumer_add()
161 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_consumer_del()  local
164 	spin_lock_irq(&ipc->cons_list_lock);  in ivpu_ipc_consumer_del()
165 	list_del(&cons->link);  in ivpu_ipc_consumer_del()
166 	spin_unlock_irq(&ipc->cons_list_lock);  in ivpu_ipc_consumer_del()
168 	spin_lock_irq(&cons->rx_msg_lock);  in ivpu_ipc_consumer_del()
169 	list_for_each_entry_safe(rx_msg, r, &cons->rx_msg_list, link) {  in ivpu_ipc_consumer_del()
170 		list_del(&rx_msg->link);  in ivpu_ipc_consumer_del()
171 		ivpu_ipc_rx_mark_free(vdev, rx_msg->ipc_hdr, rx_msg->jsm_msg);  in ivpu_ipc_consumer_del()
172 		atomic_dec(&ipc->rx_msg_count);  in ivpu_ipc_consumer_del()
175 	spin_unlock_irq(&cons->rx_msg_lock);  in ivpu_ipc_consumer_del()
177 	ivpu_ipc_tx_release(vdev, cons->tx_vpu_addr);  in ivpu_ipc_consumer_del()
183 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_send()  local
186 	mutex_lock(&ipc->lock);  in ivpu_ipc_send()
188 	if (!ipc->on) {  in ivpu_ipc_send()
189 		ret = -EAGAIN;  in ivpu_ipc_send()
197 	ivpu_ipc_tx(vdev, cons->tx_vpu_addr);  in ivpu_ipc_send()
200 	mutex_unlock(&ipc->lock);  in ivpu_ipc_send()
208 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_receive()  local
212 	wait_ret = wait_event_timeout(cons->rx_msg_wq,  in ivpu_ipc_receive()
214 				      !list_empty(&cons->rx_msg_list),  in ivpu_ipc_receive()
218 		return -EINTR;  in ivpu_ipc_receive()
221 		return -ETIMEDOUT;  in ivpu_ipc_receive()
223 	spin_lock_irq(&cons->rx_msg_lock);  in ivpu_ipc_receive()
224 	rx_msg = list_first_entry_or_null(&cons->rx_msg_list, struct ivpu_ipc_rx_msg, link);  in ivpu_ipc_receive()
226 		spin_unlock_irq(&cons->rx_msg_lock);  in ivpu_ipc_receive()
227 		return -EAGAIN;  in ivpu_ipc_receive()
229 	list_del(&rx_msg->link);  in ivpu_ipc_receive()
230 	spin_unlock_irq(&cons->rx_msg_lock);  in ivpu_ipc_receive()
233 		memcpy(ipc_buf, rx_msg->ipc_hdr, sizeof(*ipc_buf));  in ivpu_ipc_receive()
234 	if (rx_msg->jsm_msg) {  in ivpu_ipc_receive()
235 		u32 size = min_t(int, rx_msg->ipc_hdr->data_size, sizeof(*ipc_payload));  in ivpu_ipc_receive()
237 		if (rx_msg->jsm_msg->result != VPU_JSM_STATUS_SUCCESS) {  in ivpu_ipc_receive()
238 			ivpu_dbg(vdev, IPC, "IPC resp result error: %d\n", rx_msg->jsm_msg->result);  in ivpu_ipc_receive()
239 			ret = -EBADMSG;  in ivpu_ipc_receive()
243 			memcpy(ipc_payload, rx_msg->jsm_msg, size);  in ivpu_ipc_receive()
246 	ivpu_ipc_rx_mark_free(vdev, rx_msg->ipc_hdr, rx_msg->jsm_msg);  in ivpu_ipc_receive()
247 	atomic_dec(&ipc->rx_msg_count);  in ivpu_ipc_receive()
266 		ivpu_warn(vdev, "IPC send failed: %d\n", ret);  in ivpu_ipc_send_receive_internal()
272 		ivpu_warn(vdev, "IPC receive failed: type 0x%x, ret %d\n", req->type, ret);  in ivpu_ipc_send_receive_internal()
276 	if (resp->type != expected_resp_type) {  in ivpu_ipc_send_receive_internal()
277 		ivpu_warn(vdev, "Invalid JSM response type: 0x%x\n", resp->type);  in ivpu_ipc_send_receive_internal()
278 		ret = -EBADE;  in ivpu_ipc_send_receive_internal()
301 	if (ret != -ETIMEDOUT)  in ivpu_ipc_send_receive()
306 						vdev->timeout.jsm);  in ivpu_ipc_send_receive()
307 	if (hb_ret == -ETIMEDOUT) {  in ivpu_ipc_send_receive()
321 	if (cons->channel != ipc_hdr->channel)  in ivpu_ipc_match_consumer()
324 	if (!jsm_msg || jsm_msg->request_id == cons->request_id)  in ivpu_ipc_match_consumer()
334 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_dispatch()  local
338 	lockdep_assert_held(&ipc->cons_list_lock);  in ivpu_ipc_dispatch()
346 	atomic_inc(&ipc->rx_msg_count);  in ivpu_ipc_dispatch()
348 	rx_msg->ipc_hdr = ipc_hdr;  in ivpu_ipc_dispatch()
349 	rx_msg->jsm_msg = jsm_msg;  in ivpu_ipc_dispatch()
351 	spin_lock_irqsave(&cons->rx_msg_lock, flags);  in ivpu_ipc_dispatch()
352 	list_add_tail(&rx_msg->link, &cons->rx_msg_list);  in ivpu_ipc_dispatch()
353 	spin_unlock_irqrestore(&cons->rx_msg_lock, flags);  in ivpu_ipc_dispatch()
355 	wake_up(&cons->rx_msg_wq);  in ivpu_ipc_dispatch()
360 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_irq_handler()  local
369 	 * Driver needs to purge all messages from IPC FIFO to clear IPC interrupt.  in ivpu_ipc_irq_handler()
370 	 * Without purge IPC FIFO to 0 next IPC interrupts won't be generated.  in ivpu_ipc_irq_handler()
375 			ivpu_err(vdev, "Failed to read IPC rx addr register\n");  in ivpu_ipc_irq_handler()
376 			return -EIO;  in ivpu_ipc_irq_handler()
379 		ipc_hdr = ivpu_to_cpu_addr(ipc->mem_rx, vpu_addr);  in ivpu_ipc_irq_handler()
381 			ivpu_warn(vdev, "IPC msg 0x%x out of range\n", vpu_addr);  in ivpu_ipc_irq_handler()
387 		if (ipc_hdr->channel != IVPU_IPC_CHAN_BOOT_MSG) {  in ivpu_ipc_irq_handler()
388 			jsm_msg = ivpu_to_cpu_addr(ipc->mem_rx, ipc_hdr->data_addr);  in ivpu_ipc_irq_handler()
390 				ivpu_warn(vdev, "JSM msg 0x%x out of range\n", ipc_hdr->data_addr);  in ivpu_ipc_irq_handler()
394 			ivpu_jsm_msg_dump(vdev, "RX", jsm_msg, ipc_hdr->data_addr);  in ivpu_ipc_irq_handler()
397 		if (atomic_read(&ipc->rx_msg_count) > IPC_MAX_RX_MSG) {  in ivpu_ipc_irq_handler()
398 			ivpu_warn(vdev, "IPC RX msg dropped, msg count %d\n", IPC_MAX_RX_MSG);  in ivpu_ipc_irq_handler()
404 		spin_lock_irqsave(&ipc->cons_list_lock, flags);  in ivpu_ipc_irq_handler()
405 		list_for_each_entry(cons, &ipc->cons_list, link) {  in ivpu_ipc_irq_handler()
412 		spin_unlock_irqrestore(&ipc->cons_list_lock, flags);  in ivpu_ipc_irq_handler()
415 			ivpu_dbg(vdev, IPC, "IPC RX msg 0x%x dropped (no consumer)\n", vpu_addr);  in ivpu_ipc_irq_handler()
425 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_init()  local
426 	int ret = -ENOMEM;  in ivpu_ipc_init()
428 	ipc->mem_tx = ivpu_bo_alloc_internal(vdev, 0, SZ_16K, DRM_IVPU_BO_WC);  in ivpu_ipc_init()
429 	if (!ipc->mem_tx)  in ivpu_ipc_init()
432 	ipc->mem_rx = ivpu_bo_alloc_internal(vdev, 0, SZ_16K, DRM_IVPU_BO_WC);  in ivpu_ipc_init()
433 	if (!ipc->mem_rx)  in ivpu_ipc_init()
436 	ipc->mm_tx = devm_gen_pool_create(vdev->drm.dev, __ffs(IVPU_IPC_ALIGNMENT),  in ivpu_ipc_init()
437 					  -1, "TX_IPC_JSM");  in ivpu_ipc_init()
438 	if (IS_ERR(ipc->mm_tx)) {  in ivpu_ipc_init()
439 		ret = PTR_ERR(ipc->mm_tx);  in ivpu_ipc_init()
440 		ivpu_err(vdev, "Failed to create gen pool, %pe\n", ipc->mm_tx);  in ivpu_ipc_init()
444 	ret = gen_pool_add(ipc->mm_tx, ipc->mem_tx->vpu_addr, ipc->mem_tx->base.size, -1);  in ivpu_ipc_init()
450 	INIT_LIST_HEAD(&ipc->cons_list);  in ivpu_ipc_init()
451 	spin_lock_init(&ipc->cons_list_lock);  in ivpu_ipc_init()
452 	drmm_mutex_init(&vdev->drm, &ipc->lock);  in ivpu_ipc_init()
458 	ivpu_bo_free_internal(ipc->mem_rx);  in ivpu_ipc_init()
460 	ivpu_bo_free_internal(ipc->mem_tx);  in ivpu_ipc_init()
471 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_enable()  local
473 	mutex_lock(&ipc->lock);  in ivpu_ipc_enable()
474 	ipc->on = true;  in ivpu_ipc_enable()
475 	mutex_unlock(&ipc->lock);  in ivpu_ipc_enable()
480 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_disable()  local
484 	mutex_lock(&ipc->lock);  in ivpu_ipc_disable()
485 	ipc->on = false;  in ivpu_ipc_disable()
486 	mutex_unlock(&ipc->lock);  in ivpu_ipc_disable()
488 	spin_lock_irqsave(&ipc->cons_list_lock, flags);  in ivpu_ipc_disable()
489 	list_for_each_entry_safe(cons, c, &ipc->cons_list, link)  in ivpu_ipc_disable()
490 		wake_up(&cons->rx_msg_wq);  in ivpu_ipc_disable()
491 	spin_unlock_irqrestore(&ipc->cons_list_lock, flags);  in ivpu_ipc_disable()
496 	struct ivpu_ipc_info *ipc = vdev->ipc;  in ivpu_ipc_reset()  local
498 	mutex_lock(&ipc->lock);  in ivpu_ipc_reset()
500 	memset(ipc->mem_tx->kvaddr, 0, ipc->mem_tx->base.size);  in ivpu_ipc_reset()
501 	memset(ipc->mem_rx->kvaddr, 0, ipc->mem_rx->base.size);  in ivpu_ipc_reset()
504 	mutex_unlock(&ipc->lock);  in ivpu_ipc_reset()