[PATCH v7 08/10] virtio-gpu: Resource UUID

[Dmitry Osipenko <dmitry.osipenko@collabora.com>]

From: Antonio Caggiano <antonio.caggiano@collabora.com>

Enable resource UUID feature and implement command resource assign UUID.
UUID feature availability is mandatory for Vulkan Venus context.

UUID is intended for sharing dmabufs between virtio devices on host. Qemu
doesn't have second virtio device for sharing, thus a simple stub UUID
implementation is enough. More complete implementation using global UUID
resource table might become interesting for a multi-gpu cases.

Signed-off-by: Antonio Caggiano <antonio.caggiano@collabora.com>
Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
---
 hw/display/trace-events        |  1 +
 hw/display/virtio-gpu-base.c   |  1 +
 hw/display/virtio-gpu-virgl.c  | 31 +++++++++++++++++++++++++++++++
 hw/display/virtio-gpu.c        |  5 +++++
 include/hw/virtio/virtio-gpu.h |  3 +++
 5 files changed, 41 insertions(+)

diff --git a/hw/display/trace-events b/hw/display/trace-events
index 2336a0ca1570..54d6894c59f4 100644
--- a/hw/display/trace-events
+++ b/hw/display/trace-events
@@ -41,6 +41,7 @@ virtio_gpu_cmd_res_create_blob(uint32_t res, uint64_t size) "res 0x%x, size %" P
 virtio_gpu_cmd_res_unref(uint32_t res) "res 0x%x"
 virtio_gpu_cmd_res_back_attach(uint32_t res) "res 0x%x"
 virtio_gpu_cmd_res_back_detach(uint32_t res) "res 0x%x"
+virtio_gpu_cmd_res_assign_uuid(uint32_t res) "res 0x%x"
 virtio_gpu_cmd_res_xfer_toh_2d(uint32_t res) "res 0x%x"
 virtio_gpu_cmd_res_xfer_toh_3d(uint32_t res) "res 0x%x"
 virtio_gpu_cmd_res_xfer_fromh_3d(uint32_t res) "res 0x%x"
diff --git a/hw/display/virtio-gpu-base.c b/hw/display/virtio-gpu-base.c
index 4fc7ef8896c1..610926348bd9 100644
--- a/hw/display/virtio-gpu-base.c
+++ b/hw/display/virtio-gpu-base.c
@@ -225,6 +225,7 @@ virtio_gpu_base_get_features(VirtIODevice *vdev, uint64_t features,
     if (virtio_gpu_virgl_enabled(g->conf) ||
         virtio_gpu_rutabaga_enabled(g->conf)) {
         features |= (1 << VIRTIO_GPU_F_VIRGL);
+        features |= (1 << VIRTIO_GPU_F_RESOURCE_UUID);
     }
     if (virtio_gpu_edid_enabled(g->conf)) {
         features |= (1 << VIRTIO_GPU_F_EDID);
diff --git a/hw/display/virtio-gpu-virgl.c b/hw/display/virtio-gpu-virgl.c
index ec63f5d698b7..e01ab8295d4d 100644
--- a/hw/display/virtio-gpu-virgl.c
+++ b/hw/display/virtio-gpu-virgl.c
@@ -113,6 +113,7 @@ static void virgl_cmd_create_resource_2d(VirtIOGPU *g,
     res->format = c2d.format;
     res->resource_id = c2d.resource_id;
     res->dmabuf_fd = -1;
+    qemu_uuid_generate(&res->uuid);
     QTAILQ_INSERT_HEAD(&g->reslist, res, next);
 
     args.handle = c2d.resource_id;
@@ -161,6 +162,7 @@ static void virgl_cmd_create_resource_3d(VirtIOGPU *g,
     res->format = c3d.format;
     res->resource_id = c3d.resource_id;
     res->dmabuf_fd = -1;
+    qemu_uuid_generate(&res->uuid);
     QTAILQ_INSERT_HEAD(&g->reslist, res, next);
 
     args.handle = c3d.resource_id;
@@ -584,6 +586,7 @@ static void virgl_cmd_resource_create_blob(VirtIOGPU *g,
     res->resource_id = cblob.resource_id;
     res->blob_size = cblob.size;
     res->dmabuf_fd = -1;
+    qemu_uuid_generate(&res->uuid);
 
     if (cblob.blob_mem != VIRTIO_GPU_BLOB_MEM_HOST3D) {
         ret = virtio_gpu_create_mapping_iov(g, cblob.nr_entries, sizeof(cblob),
@@ -781,6 +784,31 @@ static void virgl_cmd_set_scanout_blob(VirtIOGPU *g,
 }
 #endif /* HAVE_VIRGL_RESOURCE_BLOB */
 
+static void virgl_cmd_assign_uuid(VirtIOGPU *g,
+                                  struct virtio_gpu_ctrl_command *cmd)
+{
+    struct virtio_gpu_resource_assign_uuid assign;
+    struct virtio_gpu_resp_resource_uuid resp;
+    struct virtio_gpu_simple_resource *res;
+
+    VIRTIO_GPU_FILL_CMD(assign);
+    virtio_gpu_bswap_32(&assign, sizeof(assign));
+    trace_virtio_gpu_cmd_res_assign_uuid(assign.resource_id);
+
+    res = virtio_gpu_find_resource(g, assign.resource_id);
+    if (!res) {
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: resource does not exist %d\n",
+                      __func__, assign.resource_id);
+        cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
+        return;
+    }
+
+    memset(&resp, 0, sizeof(resp));
+    resp.hdr.type = VIRTIO_GPU_RESP_OK_RESOURCE_UUID;
+    memcpy(resp.uuid, res->uuid.data, sizeof(resp.uuid));
+    virtio_gpu_ctrl_response(g, cmd, &resp.hdr, sizeof(resp));
+}
+
 void virtio_gpu_virgl_process_cmd(VirtIOGPU *g,
                                       struct virtio_gpu_ctrl_command *cmd)
 {
@@ -835,6 +863,9 @@ void virtio_gpu_virgl_process_cmd(VirtIOGPU *g,
         /* TODO add security */
         virgl_cmd_ctx_detach_resource(g, cmd);
         break;
+    case VIRTIO_GPU_CMD_RESOURCE_ASSIGN_UUID:
+        virgl_cmd_assign_uuid(g, cmd);
+        break;
     case VIRTIO_GPU_CMD_GET_CAPSET_INFO:
         virgl_cmd_get_capset_info(g, cmd);
         break;
diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index e6e09f4bf8da..dd8dcc441709 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -1231,6 +1231,7 @@ static int virtio_gpu_save(QEMUFile *f, void *opaque, size_t size,
         }
         qemu_put_buffer(f, (void *)pixman_image_get_data(res->image),
                         pixman_image_get_stride(res->image) * res->height);
+        qemu_put_buffer(f, res->uuid.data, sizeof(res->uuid.data));
     }
     qemu_put_be32(f, 0); /* end of list */
 
@@ -1328,6 +1329,7 @@ static int virtio_gpu_load(QEMUFile *f, void *opaque, size_t size,
         }
         qemu_get_buffer(f, (void *)pixman_image_get_data(res->image),
                         pixman_image_get_stride(res->image) * res->height);
+        qemu_get_buffer(f, res->uuid.data, sizeof(res->uuid.data));
 
         if (!virtio_gpu_load_restore_mapping(g, res)) {
             pixman_image_unref(res->image);
@@ -1366,6 +1368,7 @@ static int virtio_gpu_blob_save(QEMUFile *f, void *opaque, size_t size,
             qemu_put_be64(f, res->addrs[i]);
             qemu_put_be32(f, res->iov[i].iov_len);
         }
+        qemu_put_buffer(f, res->uuid.data, sizeof(res->uuid.data));
     }
     qemu_put_be32(f, 0); /* end of list */
 
@@ -1400,6 +1403,8 @@ static int virtio_gpu_blob_load(QEMUFile *f, void *opaque, size_t size,
             res->iov[i].iov_len = qemu_get_be32(f);
         }
 
+        qemu_get_buffer(f, res->uuid.data, sizeof(res->uuid.data));
+
         if (!virtio_gpu_load_restore_mapping(g, res)) {
             g_free(res);
             return -EINVAL;
diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h
index f3681476eaf6..a16263334b47 100644
--- a/include/hw/virtio/virtio-gpu.h
+++ b/include/hw/virtio/virtio-gpu.h
@@ -19,6 +19,7 @@
 #include "ui/console.h"
 #include "hw/virtio/virtio.h"
 #include "qemu/log.h"
+#include "qemu/uuid.h"
 #include "sysemu/vhost-user-backend.h"
 
 #include "standard-headers/linux/virtio_gpu.h"
@@ -62,6 +63,8 @@ struct virtio_gpu_simple_resource {
     uint8_t *remapped;
     MemoryRegion *mr;
 
+    QemuUUID uuid;
+
     QTAILQ_ENTRY(virtio_gpu_simple_resource) next;
 };
 
-- 
2.44.0