[PULL 13/13] virtio-gpu: Support Venus context

["Alex Bennée" <alex.bennee@linaro.org>]

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

Request Venus when initializing VirGL and if venus=true flag is set for
virtio-gpu-gl device.

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>
Message-Id: <20241024210311.118220-14-dmitry.osipenko@collabora.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

diff --git a/docs/system/devices/virtio-gpu.rst b/docs/system/devices/virtio-gpu.rst
index cb73dd7998..b7eb0fc0e7 100644
--- a/docs/system/devices/virtio-gpu.rst
+++ b/docs/system/devices/virtio-gpu.rst
@@ -71,6 +71,17 @@ representation back to OpenGL API calls.
 .. _Gallium3D: https://www.freedesktop.org/wiki/Software/gallium/
 .. _virglrenderer: https://gitlab.freedesktop.org/virgl/virglrenderer/
 
+Translation of Vulkan API calls is supported since release of `virglrenderer`_
+v1.0.0 using `venus`_ protocol. ``Venus`` virtio-gpu capability set ("capset")
+requires host blob support (``hostmem`` and ``blob`` fields) and should
+be enabled using ``venus`` field. The ``hostmem`` field specifies the size
+of virtio-gpu host memory window. This is typically between 256M and 8G.
+
+.. parsed-literal::
+    -device virtio-gpu-gl,hostmem=8G,blob=true,venus=true
+
+.. _venus: https://gitlab.freedesktop.org/virgl/venus-protocol/
+
 virtio-gpu rutabaga
 -------------------
 
diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h
index 07131d8eb9..553799b8cc 100644
--- a/include/hw/virtio/virtio-gpu.h
+++ b/include/hw/virtio/virtio-gpu.h
@@ -97,6 +97,7 @@ enum virtio_gpu_base_conf_flags {
     VIRTIO_GPU_FLAG_BLOB_ENABLED,
     VIRTIO_GPU_FLAG_CONTEXT_INIT_ENABLED,
     VIRTIO_GPU_FLAG_RUTABAGA_ENABLED,
+    VIRTIO_GPU_FLAG_VENUS_ENABLED,
 };
 
 #define virtio_gpu_virgl_enabled(_cfg) \
@@ -115,6 +116,8 @@ enum virtio_gpu_base_conf_flags {
     (_cfg.flags & (1 << VIRTIO_GPU_FLAG_RUTABAGA_ENABLED))
 #define virtio_gpu_hostmem_enabled(_cfg) \
     (_cfg.hostmem > 0)
+#define virtio_gpu_venus_enabled(_cfg) \
+    (_cfg.flags & (1 << VIRTIO_GPU_FLAG_VENUS_ENABLED))
 
 struct virtio_gpu_base_conf {
     uint32_t max_outputs;
diff --git a/hw/display/virtio-gpu-gl.c b/hw/display/virtio-gpu-gl.c
index e859c0dff0..7c0e448b46 100644
--- a/hw/display/virtio-gpu-gl.c
+++ b/hw/display/virtio-gpu-gl.c
@@ -157,6 +157,8 @@ static void virtio_gpu_gl_device_realize(DeviceState *qdev, Error **errp)
 static Property virtio_gpu_gl_properties[] = {
     DEFINE_PROP_BIT("stats", VirtIOGPU, parent_obj.conf.flags,
                     VIRTIO_GPU_FLAG_STATS_ENABLED, false),
+    DEFINE_PROP_BIT("venus", VirtIOGPU, parent_obj.conf.flags,
+                    VIRTIO_GPU_FLAG_VENUS_ENABLED, false),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/hw/display/virtio-gpu-virgl.c b/hw/display/virtio-gpu-virgl.c
index 5a881c58a1..eedae7357f 100644
--- a/hw/display/virtio-gpu-virgl.c
+++ b/hw/display/virtio-gpu-virgl.c
@@ -1128,6 +1128,11 @@ int virtio_gpu_virgl_init(VirtIOGPU *g)
         flags |= VIRGL_RENDERER_D3D11_SHARE_TEXTURE;
     }
 #endif
+#if VIRGL_VERSION_MAJOR >= 1
+    if (virtio_gpu_venus_enabled(g->parent_obj.conf)) {
+        flags |= VIRGL_RENDERER_VENUS | VIRGL_RENDERER_RENDER_SERVER;
+    }
+#endif
 
     ret = virgl_renderer_init(g, flags, &virtio_gpu_3d_cbs);
     if (ret != 0) {
@@ -1161,7 +1166,7 @@ static void virtio_gpu_virgl_add_capset(GArray *capset_ids, uint32_t capset_id)
 
 GArray *virtio_gpu_virgl_get_capsets(VirtIOGPU *g)
 {
-    uint32_t capset2_max_ver, capset2_max_size;
+    uint32_t capset_max_ver, capset_max_size;
     GArray *capset_ids;
 
     capset_ids = g_array_new(false, false, sizeof(uint32_t));
@@ -1170,11 +1175,20 @@ GArray *virtio_gpu_virgl_get_capsets(VirtIOGPU *g)
     virtio_gpu_virgl_add_capset(capset_ids, VIRTIO_GPU_CAPSET_VIRGL);
 
     virgl_renderer_get_cap_set(VIRTIO_GPU_CAPSET_VIRGL2,
-                              &capset2_max_ver,
-                              &capset2_max_size);
-    if (capset2_max_ver) {
+                               &capset_max_ver,
+                               &capset_max_size);
+    if (capset_max_ver) {
         virtio_gpu_virgl_add_capset(capset_ids, VIRTIO_GPU_CAPSET_VIRGL2);
     }
 
+    if (virtio_gpu_venus_enabled(g->parent_obj.conf)) {
+        virgl_renderer_get_cap_set(VIRTIO_GPU_CAPSET_VENUS,
+                                   &capset_max_ver,
+                                   &capset_max_size);
+        if (capset_max_size) {
+            virtio_gpu_virgl_add_capset(capset_ids, VIRTIO_GPU_CAPSET_VENUS);
+        }
+    }
+
     return capset_ids;
 }
diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index b6cd9fe567..c0570ef856 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -1477,6 +1477,21 @@ void virtio_gpu_device_realize(DeviceState *qdev, Error **errp)
 #endif
     }
 
+    if (virtio_gpu_venus_enabled(g->parent_obj.conf)) {
+#ifdef VIRGL_VERSION_MAJOR
+    #if VIRGL_VERSION_MAJOR >= 1
+        if (!virtio_gpu_blob_enabled(g->parent_obj.conf) ||
+            !virtio_gpu_hostmem_enabled(g->parent_obj.conf)) {
+            error_setg(errp, "venus requires enabled blob and hostmem options");
+            return;
+        }
+    #else
+        error_setg(errp, "old virglrenderer, venus unsupported");
+        return;
+    #endif
+#endif
+    }
+
     if (!virtio_gpu_base_device_realize(qdev,
                                         virtio_gpu_handle_ctrl_cb,
                                         virtio_gpu_handle_cursor_cb,
-- 
2.39.5