[PATCH v8 05/11] virtio-gpu: Add virgl resource management

[Dmitry Osipenko]

From: Huang Rui <ray.huang@amd.com>

In a preparation to adding host blobs support to virtio-gpu, add virgl
resource management that allows to retrieve resource based on its ID.

Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Antonio Caggiano <quic_acaggian@quicinc.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
---
 hw/display/virtio-gpu-virgl.c | 57 +++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)

diff --git a/hw/display/virtio-gpu-virgl.c b/hw/display/virtio-gpu-virgl.c
index ef598d8d23ee..04f7a191c41a 100644
--- a/hw/display/virtio-gpu-virgl.c
+++ b/hw/display/virtio-gpu-virgl.c
@@ -35,11 +35,34 @@ static void virgl_cmd_create_resource_2d(VirtIOGPU *g,
 {
     struct virtio_gpu_resource_create_2d c2d;
     struct virgl_renderer_resource_create_args args;
+    struct virtio_gpu_simple_resource *res;
 
     VIRTIO_GPU_FILL_CMD(c2d);
     trace_virtio_gpu_cmd_res_create_2d(c2d.resource_id, c2d.format,
                                        c2d.width, c2d.height);
 
+    if (c2d.resource_id == 0) {
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: resource id 0 is not allowed\n",
+                      __func__);
+        cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
+        return;
+    }
+
+    res = virtio_gpu_find_resource(g, c2d.resource_id);
+    if (res) {
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: resource already exists %d\n",
+                      __func__, c2d.resource_id);
+        cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
+        return;
+    }
+
+    res = g_new0(struct virtio_gpu_simple_resource, 1);
+    res->width = c2d.width;
+    res->height = c2d.height;
+    res->format = c2d.format;
+    res->resource_id = c2d.resource_id;
+    QTAILQ_INSERT_HEAD(&g->reslist, res, next);
+
     args.handle = c2d.resource_id;
     args.target = 2;
     args.format = c2d.format;
@@ -59,11 +82,34 @@ static void virgl_cmd_create_resource_3d(VirtIOGPU *g,
 {
     struct virtio_gpu_resource_create_3d c3d;
     struct virgl_renderer_resource_create_args args;
+    struct virtio_gpu_simple_resource *res;
 
     VIRTIO_GPU_FILL_CMD(c3d);
     trace_virtio_gpu_cmd_res_create_3d(c3d.resource_id, c3d.format,
                                        c3d.width, c3d.height, c3d.depth);
 
+    if (c3d.resource_id == 0) {
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: resource id 0 is not allowed\n",
+                      __func__);
+        cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
+        return;
+    }
+
+    res = virtio_gpu_find_resource(g, c3d.resource_id);
+    if (res) {
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: resource already exists %d\n",
+                      __func__, c3d.resource_id);
+        cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
+        return;
+    }
+
+    res = g_new0(struct virtio_gpu_simple_resource, 1);
+    res->width = c3d.width;
+    res->height = c3d.height;
+    res->format = c3d.format;
+    res->resource_id = c3d.resource_id;
+    QTAILQ_INSERT_HEAD(&g->reslist, res, next);
+
     args.handle = c3d.resource_id;
     args.target = c3d.target;
     args.format = c3d.format;
@@ -82,12 +128,19 @@ static void virgl_cmd_resource_unref(VirtIOGPU *g,
                                      struct virtio_gpu_ctrl_command *cmd)
 {
     struct virtio_gpu_resource_unref unref;
+    struct virtio_gpu_simple_resource *res;
     struct iovec *res_iovs = NULL;
     int num_iovs = 0;
 
     VIRTIO_GPU_FILL_CMD(unref);
     trace_virtio_gpu_cmd_res_unref(unref.resource_id);
 
+    res = virtio_gpu_find_resource(g, unref.resource_id);
+    if (!res) {
+        cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
+        return;
+    }
+
     virgl_renderer_resource_detach_iov(unref.resource_id,
                                        &res_iovs,
                                        &num_iovs);
@@ -95,6 +148,10 @@ static void virgl_cmd_resource_unref(VirtIOGPU *g,
         virtio_gpu_cleanup_mapping_iov(g, res_iovs, num_iovs);
     }
     virgl_renderer_resource_unref(unref.resource_id);
+
+    QTAILQ_REMOVE(&g->reslist, res, next);
+
+    g_free(res);
 }
 
 static void virgl_cmd_context_create(VirtIOGPU *g,
-- 
2.44.0