virgl: Add support for querying detailed memory info

This allows for virgl guests to expose GL_NVX_gpu_memory_info and
GL_ATI_meminfo when the extensions are supported on the host.

Signed-off-by: Rohan Garg <rohan.garg@collabora.com>
Reviewed-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9337>

src/virtio/virtio-gpu/virgl_hw.h

@@ -440,6 +440,7 @@ enum virgl_formats {
 #define VIRGL_CAP_V2_BLEND_EQUATION       (1 << 0)
 #define VIRGL_CAP_V2_UNTYPED_RESOURCE     (1 << 1)
 #define VIRGL_CAP_V2_VIDEO_MEMORY         (1 << 2)
+#define VIRGL_CAP_V2_MEMINFO              (1 << 3)
 
 /* virgl bind flags - these are compatible with mesa 10.5 gallium.
  * but are fixed, no other should be passed to virgl either.

src/virtio/virtio-gpu/virgl_protocol.h

@@ -35,6 +35,16 @@ struct virgl_host_query_state {
    uint64_t result;
 };
 
+struct virgl_memory_info
+{
+   uint32_t total_device_memory; /**< size of device memory, e.g. VRAM */
+   uint32_t avail_device_memory; /**< free device memory at the moment */
+   uint32_t total_staging_memory; /**< size of staging memory, e.g. GART */
+   uint32_t avail_staging_memory; /**< free staging memory at the moment */
+   uint32_t device_memory_evicted; /**< size of memory evicted (monotonic counter) */
+   uint32_t nr_device_memory_evictions; /**< # of evictions (monotonic counter) */
+};
+
 enum virgl_object_type {
    VIRGL_OBJECT_NULL,
    VIRGL_OBJECT_BLEND,
@@ -103,6 +113,7 @@ enum virgl_context_cmd {
    VIRGL_CCMD_CLEAR_TEXTURE,
    VIRGL_CCMD_PIPE_RESOURCE_CREATE,
    VIRGL_CCMD_PIPE_RESOURCE_SET_TYPE,
+   VIRGL_CCMD_GET_MEMORY_INFO,
    VIRGL_MAX_COMMANDS
 };