vtest: use server-generated res ids since version 3

VCMD_RESOURCE_CREATE and VCMD_RESOURCE_CREATE2 use and return
server-generated ids since version 3.  The client id must be 0.

This makes the commands work more like linux's
DRM_IOCTL_VIRTGPU_RESOURCE_CREATE.

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Reviewed-by: Ryan Neph <ryanneph@google.com>
Reviewed-by: Gert Wollny <gert.wollny@collabora.com>

vtest/vtest_protocol.h

@@ -60,6 +60,7 @@
 
 #define VCMD_PROTOCOL_VERSION 11
 
+/* since protocol version 2 */
 #define VCMD_RESOURCE_CREATE2 12
 #define VCMD_TRANSFER_GET2 13
 #define VCMD_TRANSFER_PUT2 14
@@ -72,7 +73,7 @@
 #endif /* VIRGL_RENDERER_UNSTABLE_APIS */
 
 #define VCMD_RES_CREATE_SIZE 10
-#define VCMD_RES_CREATE_RES_HANDLE 0
+#define VCMD_RES_CREATE_RES_HANDLE 0 /* must be 0 since protocol version 3 */
 #define VCMD_RES_CREATE_TARGET 1
 #define VCMD_RES_CREATE_FORMAT 2
 #define VCMD_RES_CREATE_BIND 3
@@ -82,9 +83,10 @@
 #define VCMD_RES_CREATE_ARRAY_SIZE 7
 #define VCMD_RES_CREATE_LAST_LEVEL 8
 #define VCMD_RES_CREATE_NR_SAMPLES 9
+/* resp res_id since protocol version 3 */
 
 #define VCMD_RES_CREATE2_SIZE 11
-#define VCMD_RES_CREATE2_RES_HANDLE 0
+#define VCMD_RES_CREATE2_RES_HANDLE 0 /* must be 0 since protocol version 3 */
 #define VCMD_RES_CREATE2_TARGET 1
 #define VCMD_RES_CREATE2_FORMAT 2
 #define VCMD_RES_CREATE2_BIND 3
@@ -95,6 +97,7 @@
 #define VCMD_RES_CREATE2_LAST_LEVEL 8
 #define VCMD_RES_CREATE2_NR_SAMPLES 9
 #define VCMD_RES_CREATE2_DATA_SIZE 10
+/* resp res_id since protocol version 3, and fd if data_size >0 */
 
 #define VCMD_RES_UNREF_SIZE 1
 #define VCMD_RES_UNREF_RES_HANDLE 0

vtest/vtest_renderer.c

@@ -804,15 +804,22 @@ static int vtest_create_resource_setup_shm(struct vtest_resource *res,
 }
 
 static int vtest_create_resource_internal(struct vtest_context *ctx,
+                                          uint32_t cmd_id,
                                           struct virgl_renderer_resource_create_args *args,
                                           size_t shm_size)
 {
    struct vtest_resource *res;
    int ret;
 
+   if (ctx->protocol_version >= 3) {
+      if (args->handle)
+         return -EINVAL;
+   } else {
       // Check that the handle doesn't already exist.
-   if (util_hash_table_get(ctx->resource_table, intptr_to_pointer(args->handle)))
+      if (util_hash_table_get(ctx->resource_table, intptr_to_pointer(args->handle))) {
          return -EEXIST;
+      }
+   }
 
    res = vtest_new_resource(args->handle);
    if (!res)
@@ -827,6 +834,19 @@ static int vtest_create_resource_internal(struct vtest_context *ctx,
 
    virgl_renderer_ctx_attach_resource(ctx->ctx_id, res->res_id);
 
+   if (ctx->protocol_version >= 3) {
+      uint32_t resp_buf[VTEST_HDR_SIZE + 1] = {
+         [VTEST_CMD_LEN] = 1,
+         [VTEST_CMD_ID] = cmd_id,
+         [VTEST_CMD_DATA_START] = res->res_id,
+      };
+      ret = vtest_block_write(ctx->out_fd, resp_buf, sizeof(resp_buf));
+      if (ret < 0) {
+         vtest_unref_resource(res);
+         return ret;
+      }
+   }
+
    /* no shm for v1 resources or v2 multi-sample resources */
    if (shm_size) {
       int fd;
@@ -866,7 +886,7 @@ int vtest_create_resource(UNUSED uint32_t length_dw)
       return ret;
    }
 
-   return vtest_create_resource_internal(ctx, &args, 0);
+   return vtest_create_resource_internal(ctx, VCMD_RESOURCE_CREATE, &args, 0);
 }
 
 int vtest_create_resource2(UNUSED uint32_t length_dw)
@@ -881,7 +901,7 @@ int vtest_create_resource2(UNUSED uint32_t length_dw)
       return ret;
    }
 
-   return vtest_create_resource_internal(ctx, &args, shm_size);
+   return vtest_create_resource_internal(ctx, VCMD_RESOURCE_CREATE2, &args, shm_size);
 }
 
 int vtest_resource_unref(UNUSED uint32_t length_dw)