1 files changed, 292 insertions, 0 deletions
diff --git a/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.c b/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.c
new file mode 100644
index 000000000..dc2004790
--- /dev/null
+++ b/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.c
@@ -0,0 +1,292 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2021 MediaTek Inc.
+ * Author: Yunfei Dong <yunfei.dong@mediatek.com>
+ */
+
+#include <linux/freezer.h>
+#include <linux/interrupt.h>
+#include <linux/kthread.h>
+
+#include "mtk_vcodec_dec_pm.h"
+#include "mtk_vcodec_drv.h"
+#include "vdec_msg_queue.h"
+
+#define VDEC_MSG_QUEUE_TIMEOUT_MS 1500
+
+/* the size used to store lat slice header information */
+#define VDEC_LAT_SLICE_HEADER_SZ    (640 * SZ_1K)
+
+/* the size used to store avc error information */
+#define VDEC_ERR_MAP_SZ_AVC         (17 * SZ_1K)
+
+/* core will read the trans buffer which decoded by lat to decode again.
+ * The trans buffer size of FHD and 4K bitstreams are different.
+ */
+static int vde_msg_queue_get_trans_size(int width, int height)
+{
+	if (width > 1920 || height > 1088)
+		return 30 * SZ_1M;
+	else
+		return 6 * SZ_1M;
+}
+
+void vdec_msg_queue_init_ctx(struct vdec_msg_queue_ctx *ctx, int hardware_index)
+{
+	init_waitqueue_head(&ctx->ready_to_use);
+	INIT_LIST_HEAD(&ctx->ready_queue);
+	spin_lock_init(&ctx->ready_lock);
+	ctx->ready_num = 0;
+	ctx->hardware_index = hardware_index;
+}
+
+static struct list_head *vdec_get_buf_list(int hardware_index, struct vdec_lat_buf *buf)
+{
+	switch (hardware_index) {
+	case MTK_VDEC_CORE:
+		return &buf->core_list;
+	case MTK_VDEC_LAT0:
+		return &buf->lat_list;
+	default:
+		return NULL;
+	}
+}
+
+int vdec_msg_queue_qbuf(struct vdec_msg_queue_ctx *msg_ctx, struct vdec_lat_buf *buf)
+{
+	struct list_head *head;
+
+	head = vdec_get_buf_list(msg_ctx->hardware_index, buf);
+	if (!head) {
+		mtk_v4l2_err("fail to qbuf: %d", msg_ctx->hardware_index);
+		return -EINVAL;
+	}
+
+	spin_lock(&msg_ctx->ready_lock);
+	list_add_tail(head, &msg_ctx->ready_queue);
+	msg_ctx->ready_num++;
+
+	if (msg_ctx->hardware_index != MTK_VDEC_CORE)
+		wake_up_all(&msg_ctx->ready_to_use);
+	else
+		queue_work(buf->ctx->dev->core_workqueue,
+			   &buf->ctx->msg_queue.core_work);
+
+	mtk_v4l2_debug(3, "enqueue buf type: %d addr: 0x%p num: %d",
+		       msg_ctx->hardware_index, buf, msg_ctx->ready_num);
+	spin_unlock(&msg_ctx->ready_lock);
+
+	return 0;
+}
+
+static bool vdec_msg_queue_wait_event(struct vdec_msg_queue_ctx *msg_ctx)
+{
+	int ret;
+
+	ret = wait_event_timeout(msg_ctx->ready_to_use,
+				 !list_empty(&msg_ctx->ready_queue),
+				 msecs_to_jiffies(VDEC_MSG_QUEUE_TIMEOUT_MS));
+	if (!ret)
+		return false;
+
+	return true;
+}
+
+struct vdec_lat_buf *vdec_msg_queue_dqbuf(struct vdec_msg_queue_ctx *msg_ctx)
+{
+	struct vdec_lat_buf *buf;
+	struct list_head *head;
+	int ret;
+
+	spin_lock(&msg_ctx->ready_lock);
+	if (list_empty(&msg_ctx->ready_queue)) {
+		mtk_v4l2_debug(3, "queue is NULL, type:%d num: %d",
+			       msg_ctx->hardware_index, msg_ctx->ready_num);
+		spin_unlock(&msg_ctx->ready_lock);
+
+		if (msg_ctx->hardware_index == MTK_VDEC_CORE)
+			return NULL;
+
+		ret = vdec_msg_queue_wait_event(msg_ctx);
+		if (!ret)
+			return NULL;
+		spin_lock(&msg_ctx->ready_lock);
+	}
+
+	if (msg_ctx->hardware_index == MTK_VDEC_CORE)
+		buf = list_first_entry(&msg_ctx->ready_queue,
+				       struct vdec_lat_buf, core_list);
+	else
+		buf = list_first_entry(&msg_ctx->ready_queue,
+				       struct vdec_lat_buf, lat_list);
+
+	head = vdec_get_buf_list(msg_ctx->hardware_index, buf);
+	if (!head) {
+		spin_unlock(&msg_ctx->ready_lock);
+		mtk_v4l2_err("fail to dqbuf: %d", msg_ctx->hardware_index);
+		return NULL;
+	}
+	list_del(head);
+
+	msg_ctx->ready_num--;
+	mtk_v4l2_debug(3, "dqueue buf type:%d addr: 0x%p num: %d",
+		       msg_ctx->hardware_index, buf, msg_ctx->ready_num);
+	spin_unlock(&msg_ctx->ready_lock);
+
+	return buf;
+}
+
+void vdec_msg_queue_update_ube_rptr(struct vdec_msg_queue *msg_queue, uint64_t ube_rptr)
+{
+	spin_lock(&msg_queue->lat_ctx.ready_lock);
+	msg_queue->wdma_rptr_addr = ube_rptr;
+	mtk_v4l2_debug(3, "update ube rprt (0x%llx)", ube_rptr);
+	spin_unlock(&msg_queue->lat_ctx.ready_lock);
+}
+
+void vdec_msg_queue_update_ube_wptr(struct vdec_msg_queue *msg_queue, uint64_t ube_wptr)
+{
+	spin_lock(&msg_queue->lat_ctx.ready_lock);
+	msg_queue->wdma_wptr_addr = ube_wptr;
+	mtk_v4l2_debug(3, "update ube wprt: (0x%llx 0x%llx) offset: 0x%llx",
+		       msg_queue->wdma_rptr_addr, msg_queue->wdma_wptr_addr,
+		       ube_wptr);
+	spin_unlock(&msg_queue->lat_ctx.ready_lock);
+}
+
+bool vdec_msg_queue_wait_lat_buf_full(struct vdec_msg_queue *msg_queue)
+{
+	long timeout_jiff;
+	int ret;
+
+	timeout_jiff = msecs_to_jiffies(1000 * (NUM_BUFFER_COUNT + 2));
+	ret = wait_event_timeout(msg_queue->lat_ctx.ready_to_use,
+				 msg_queue->lat_ctx.ready_num == NUM_BUFFER_COUNT,
+				 timeout_jiff);
+	if (ret) {
+		mtk_v4l2_debug(3, "success to get lat buf: %d",
+			       msg_queue->lat_ctx.ready_num);
+		return true;
+	}
+	mtk_v4l2_err("failed with lat buf isn't full: %d",
+		     msg_queue->lat_ctx.ready_num);
+	return false;
+}
+
+void vdec_msg_queue_deinit(struct vdec_msg_queue *msg_queue,
+			   struct mtk_vcodec_ctx *ctx)
+{
+	struct vdec_lat_buf *lat_buf;
+	struct mtk_vcodec_mem *mem;
+	int i;
+
+	mem = &msg_queue->wdma_addr;
+	if (mem->va)
+		mtk_vcodec_mem_free(ctx, mem);
+	for (i = 0; i < NUM_BUFFER_COUNT; i++) {
+		lat_buf = &msg_queue->lat_buf[i];
+
+		mem = &lat_buf->wdma_err_addr;
+		if (mem->va)
+			mtk_vcodec_mem_free(ctx, mem);
+
+		mem = &lat_buf->slice_bc_addr;
+		if (mem->va)
+			mtk_vcodec_mem_free(ctx, mem);
+
+		kfree(lat_buf->private_data);
+	}
+}
+
+static void vdec_msg_queue_core_work(struct work_struct *work)
+{
+	struct vdec_msg_queue *msg_queue =
+		container_of(work, struct vdec_msg_queue, core_work);
+	struct mtk_vcodec_ctx *ctx =
+		container_of(msg_queue, struct mtk_vcodec_ctx, msg_queue);
+	struct mtk_vcodec_dev *dev = ctx->dev;
+	struct vdec_lat_buf *lat_buf;
+
+	lat_buf = vdec_msg_queue_dqbuf(&dev->msg_queue_core_ctx);
+	if (!lat_buf)
+		return;
+
+	ctx = lat_buf->ctx;
+	mtk_vcodec_dec_enable_hardware(ctx, MTK_VDEC_CORE);
+	mtk_vcodec_set_curr_ctx(dev, ctx, MTK_VDEC_CORE);
+
+	lat_buf->core_decode(lat_buf);
+
+	mtk_vcodec_set_curr_ctx(dev, NULL, MTK_VDEC_CORE);
+	mtk_vcodec_dec_disable_hardware(ctx, MTK_VDEC_CORE);
+	vdec_msg_queue_qbuf(&ctx->msg_queue.lat_ctx, lat_buf);
+
+	if (!list_empty(&dev->msg_queue_core_ctx.ready_queue)) {
+		mtk_v4l2_debug(3, "re-schedule to decode for core: %d",
+			       dev->msg_queue_core_ctx.ready_num);
+		queue_work(dev->core_workqueue, &msg_queue->core_work);
+	}
+}
+
+int vdec_msg_queue_init(struct vdec_msg_queue *msg_queue,
+			struct mtk_vcodec_ctx *ctx, core_decode_cb_t core_decode,
+			int private_size)
+{
+	struct vdec_lat_buf *lat_buf;
+	int i, err;
+
+	/* already init msg queue */
+	if (msg_queue->wdma_addr.size)
+		return 0;
+
+	vdec_msg_queue_init_ctx(&msg_queue->lat_ctx, MTK_VDEC_LAT0);
+	INIT_WORK(&msg_queue->core_work, vdec_msg_queue_core_work);
+	msg_queue->wdma_addr.size =
+		vde_msg_queue_get_trans_size(ctx->picinfo.buf_w,
+					     ctx->picinfo.buf_h);
+
+	err = mtk_vcodec_mem_alloc(ctx, &msg_queue->wdma_addr);
+	if (err) {
+		mtk_v4l2_err("failed to allocate wdma_addr buf");
+		return -ENOMEM;
+	}
+	msg_queue->wdma_rptr_addr = msg_queue->wdma_addr.dma_addr;
+	msg_queue->wdma_wptr_addr = msg_queue->wdma_addr.dma_addr;
+
+	for (i = 0; i < NUM_BUFFER_COUNT; i++) {
+		lat_buf = &msg_queue->lat_buf[i];
+
+		lat_buf->wdma_err_addr.size = VDEC_ERR_MAP_SZ_AVC;
+		err = mtk_vcodec_mem_alloc(ctx, &lat_buf->wdma_err_addr);
+		if (err) {
+			mtk_v4l2_err("failed to allocate wdma_err_addr buf[%d]", i);
+			goto mem_alloc_err;
+		}
+
+		lat_buf->slice_bc_addr.size = VDEC_LAT_SLICE_HEADER_SZ;
+		err = mtk_vcodec_mem_alloc(ctx, &lat_buf->slice_bc_addr);
+		if (err) {
+			mtk_v4l2_err("failed to allocate wdma_addr buf[%d]", i);
+			goto mem_alloc_err;
+		}
+
+		lat_buf->private_data = kzalloc(private_size, GFP_KERNEL);
+		if (!lat_buf->private_data) {
+			err = -ENOMEM;
+			goto mem_alloc_err;
+		}
+
+		lat_buf->ctx = ctx;
+		lat_buf->core_decode = core_decode;
+		err = vdec_msg_queue_qbuf(&msg_queue->lat_ctx, lat_buf);
+		if (err) {
+			mtk_v4l2_err("failed to qbuf buf[%d]", i);
+			goto mem_alloc_err;
+		}
+	}
+	return 0;
+
+mem_alloc_err:
+	vdec_msg_queue_deinit(msg_queue, ctx);
+	return err;
+}