legacy_apps: zynqmp_r5: init rpmsg vdev with config

Current rpmsg device is not initialized with the config space.
Initialze the rpmsg device with the vdev config parameters from the
resource table. This configures tx and rx buffer size. Host can read
this configuration and configure tx and rx buffer size accordingly.

Signed-off-by: Tanmay Shah <tanmay.shah@amd.com>

Author: tnmysh

examples/legacy_apps/machine/xlnx/zynqmp_r5/platform_info.c

@@ -408,6 +408,7 @@ platform_create_rpmsg_vdev(void *platform, unsigned int vdev_index,
 			   void (*rst_cb)(struct virtio_device *vdev),
 			   rpmsg_ns_bind_cb ns_bind_cb)
 {
+	struct remote_resource_table *rsc_tbl;
 	struct remoteproc *rproc = platform;
 	struct rpmsg_virtio_device *rpmsg_vdev;
 	struct virtio_device *vdev;
@@ -417,6 +418,8 @@ platform_create_rpmsg_vdev(void *platform, unsigned int vdev_index,
 
 	restore_initial_rsc_table();
 
+	rsc_tbl = rproc->rsc_table;
+
 	rpmsg_vdev = metal_allocate_memory(sizeof(*rpmsg_vdev));
 	if (!rpmsg_vdev)
 		return NULL;
@@ -440,9 +443,9 @@ platform_create_rpmsg_vdev(void *platform, unsigned int vdev_index,
 
 	metal_dbg("initializing rpmsg vdev\r\n");
 	/* RPMsg virtio device can set shared buffers pool argument to NULL */
-	ret =  rpmsg_init_vdev(rpmsg_vdev, vdev, ns_bind_cb,
-			       shbuf_io,
-			       &shpool);
+	ret =  rpmsg_init_vdev_with_config(rpmsg_vdev, vdev, ns_bind_cb,
+					   shbuf_io, &shpool,
+					   &rsc_tbl->vdev_config);
 	if (ret) {
 		metal_err("failed rpmsg_init_vdev\r\n");
 		goto err2;

examples/legacy_apps/machine/xlnx/zynqmp_r5/rsc_table.c

@@ -21,8 +21,9 @@
 
 #define RSC_TBL_XLNX_MAGIC	((uint32_t)'x' << 24 | (uint32_t)'a' << 16 | \
 				 (uint32_t)'m' << 8 | (uint32_t)'p')
- 
-#define RPMSG_VDEV_DFEATURES        (1 << VIRTIO_RPMSG_F_NS)
+
+#define RPMSG_VDEV_DFEATURES        (1 << VIRTIO_RPMSG_F_NS | \
+				     1 << VIRTIO_RPMSG_F_BUFSZ)
 
 /* VirtIO rpmsg device id */
 #define VIRTIO_ID_RPMSG_             7
@@ -70,9 +71,9 @@ struct remote_resource_table __resource resources = {
 	/* vdev config space */
 	.vdev_config = {
 		.version = 1,
-		.size = (uint16_t)sizeof(struct rpmsg_virtio_config)
-		.h2r_buf_size = 256, /* host to remote, i.e. tx for host */
-		.r2h_buf_size = 128, /* remote to host, i.e. rx for host */
+		.size = (uint16_t)sizeof(struct rpmsg_virtio_config),
+		.h2r_buf_size = 512, /* host to remote, i.e. tx for host */
+		.r2h_buf_size = 512, /* remote to host, i.e. rx for host */
 		.split_shpool = false
 	},
 	/* trace buffer for logs, accessible via debugfs */