[PATCH v7 09/28] media: mediatek: vcodec: allocate tee share memory

[Yunfei Dong <yunfei.dong@mediatek.com>]

Allocate two share memory for each lat and core hardware used to share
information with optee-os. Msg buffer used to send ipi command and get ack
command with optee-os, data buffer used to store vsi information which
used for hardware decode.

Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
---
 .../vcodec/decoder/mtk_vcodec_dec_optee.c     | 77 ++++++++++++++++++-
 .../vcodec/decoder/mtk_vcodec_dec_optee.h     | 32 ++++++++
 2 files changed, 108 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.c b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.c
index 6fce32f9ba18..bcef86f54d84 100644
--- a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.c
+++ b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.c
@@ -44,13 +44,66 @@ int mtk_vcodec_dec_optee_private_init(struct mtk_vcodec_dec_dev *vcodec_dev)
 }
 EXPORT_SYMBOL_GPL(mtk_vcodec_dec_optee_private_init);
 
+static void mtk_vcodec_dec_optee_deinit_memref(struct mtk_vdec_optee_ca_info *ca_info,
+					       enum mtk_vdec_optee_data_index data_index)
+{
+	tee_shm_free(ca_info->shm_memref[data_index].msg_shm);
+}
+
+static int mtk_vcodec_dec_optee_init_memref(struct tee_context *tee_vdec_ctx,
+					    struct mtk_vdec_optee_ca_info *ca_info,
+					    enum mtk_vdec_optee_data_index data_index)
+{
+	struct mtk_vdec_optee_shm_memref *shm_memref;
+	int alloc_size = 0;
+	u64 shm_param_type = 0;
+	bool copy_buffer;
+
+	switch (data_index) {
+	case OPTEE_MSG_INDEX:
+		shm_param_type = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT;
+		alloc_size = MTK_VDEC_OPTEE_MSG_SIZE;
+		copy_buffer = true;
+		break;
+	case OPTEE_DATA_INDEX:
+		shm_param_type = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT;
+		alloc_size = MTK_VDEC_OPTEE_HW_SIZE;
+		copy_buffer = false;
+		break;
+	default:
+		pr_err(MTK_DBG_VCODEC_STR "tee invalid data_index: %d.\n", data_index);
+		return -EINVAL;
+	}
+
+	shm_memref = &ca_info->shm_memref[data_index];
+
+	/* Allocate dynamic shared memory with decoder TA */
+	shm_memref->msg_shm_size = alloc_size;
+	shm_memref->param_type = shm_param_type;
+	shm_memref->copy_to_ta = copy_buffer;
+	shm_memref->msg_shm = tee_shm_alloc_kernel_buf(tee_vdec_ctx, shm_memref->msg_shm_size);
+	if (IS_ERR(shm_memref->msg_shm)) {
+		pr_err(MTK_DBG_VCODEC_STR "tee alloc buf fail: data_index:%d.\n", data_index);
+		return -ENOMEM;
+	}
+
+	shm_memref->msg_shm_ca_buf = tee_shm_get_va(shm_memref->msg_shm, 0);
+	if (IS_ERR(shm_memref->msg_shm_ca_buf)) {
+		pr_err(MTK_DBG_VCODEC_STR "tee get shm va fail: data_index:%d.\n", data_index);
+		tee_shm_free(shm_memref->msg_shm);
+		return PTR_ERR(shm_memref->msg_shm_ca_buf);
+	}
+
+	return 0;
+}
+
 static int mtk_vcodec_dec_optee_init_hw_info(struct mtk_vdec_optee_private *optee_private,
 					     enum mtk_vdec_hw_id hardware_index)
 {
 	struct device *dev = &optee_private->vcodec_dev->plat_dev->dev;
 	struct tee_ioctl_open_session_arg session_arg;
 	struct mtk_vdec_optee_ca_info *ca_info;
-	int err = 0, session_func;
+	int err, i, session_func;
 
 	/* Open lat and core session with vdec TA. */
 	switch (hardware_index) {
@@ -84,6 +137,24 @@ static int mtk_vcodec_dec_optee_init_hw_info(struct mtk_vdec_optee_private *opte
 	dev_dbg(dev, MTK_DBG_VCODEC_STR "open vdec tee session hw_id:%d session_id=%x.\n",
 		hardware_index, ca_info->vdec_session_id);
 
+	/* Allocate dynamic shared memory with decoder TA */
+	for (i = 0; i < OPTEE_MAX_INDEX; i++) {
+		err = mtk_vcodec_dec_optee_init_memref(optee_private->tee_vdec_ctx, ca_info, i);
+		if (err) {
+			dev_err(dev, MTK_DBG_VCODEC_STR "init vdec memref failed: %d.\n", i);
+			goto err_init_memref;
+		}
+	}
+
+	return err;
+
+err_init_memref:
+	--i;
+	while (i >= 0)
+		mtk_vcodec_dec_optee_deinit_memref(ca_info, i--);
+
+	tee_client_close_session(optee_private->tee_vdec_ctx, ca_info->vdec_session_id);
+
 	return err;
 }
 
@@ -91,12 +162,16 @@ static void mtk_vcodec_dec_optee_deinit_hw_info(struct mtk_vdec_optee_private *o
 						enum mtk_vdec_hw_id hw_id)
 {
 	struct mtk_vdec_optee_ca_info *ca_info;
+	int i;
 
 	if (hw_id == MTK_VDEC_LAT0)
 		ca_info = &optee_private->lat_ca;
 	else
 		ca_info = &optee_private->core_ca;
 
+	for (i = 0; i < OPTEE_MAX_INDEX; i++)
+		mtk_vcodec_dec_optee_deinit_memref(ca_info, i);
+
 	tee_client_close_session(optee_private->tee_vdec_ctx, ca_info->vdec_session_id);
 }
 
diff --git a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.h b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.h
index 8a2a82874597..271545a864d3 100644
--- a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.h
+++ b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_optee.h
@@ -18,16 +18,48 @@
 
 #define MTK_OPTEE_MAX_TEE_PARAMS 4
 
+#define MTK_VDEC_OPTEE_MSG_SIZE     128
+#define MTK_VDEC_OPTEE_HW_SIZE      (8 * SZ_1K)
+
+/**
+ * struct mtk_vdec_optee_shm_memref - shared memory reference params
+ * @msg_shm:        message shared with TA in TEE.
+ * @msg_shm_ca_buf: ca buffer.
+ *
+ * @msg_shm_size:   shared message size.
+ * @param_type:     each tee param types.
+ * @copy_to_ta:     need to copy data from ca to share memory.
+ */
+struct mtk_vdec_optee_shm_memref {
+	struct tee_shm *msg_shm;
+	u8 *msg_shm_ca_buf;
+
+	u32 msg_shm_size;
+	u64 param_type;
+	bool copy_to_ta;
+};
+
 /**
  * struct mtk_vdec_optee_ca_info - ca related param
  * @vdec_session_id:   optee TA session identifier.
  * @hw_id:             hardware index.
  * @vdec_session_func: trusted application function id used specific to the TA.
+ * @shm_memref:        shared memory reference params.
  */
 struct mtk_vdec_optee_ca_info {
 	u32 vdec_session_id;
 	enum mtk_vdec_hw_id hw_id;
 	u32 vdec_session_func;
+	struct mtk_vdec_optee_shm_memref shm_memref[MTK_OPTEE_MAX_TEE_PARAMS];
+};
+
+/*
+ * enum mtk_vdec_optee_data_index - used to indentify each shared memory information
+ */
+enum mtk_vdec_optee_data_index {
+	OPTEE_MSG_INDEX = 0,
+	OPTEE_DATA_INDEX,
+	OPTEE_MAX_INDEX,
 };
 
 /**
-- 
2.18.0