Kernel: Implement basic VirGL device

This commit flips VirtIOGPU back to using a Mutex for its operation
lock (instead of a spinlock). This is necessary for avoiding a few
system hangs when queuing actions on the driver from multiple
processes, which becomes much more of an issue when using VirGL from
multiple userspace process.

This does result in a few code paths where we inevitably have to grab
a mutex from inside a spinlock, the only way to fix both issues is to
move to issuing asynchronous virtio gpu commands.

Kernel/Graphics/VirtIOGPU/Protocol.h

@@ -11,10 +11,28 @@
 #define VIRTIO_GPU_MAX_SCANOUTS 16
 
 namespace Kernel::Graphics::VirtIOGPU {
+TYPEDEF_DISTINCT_ORDERED_ID(u32, ContextID);
 TYPEDEF_DISTINCT_ORDERED_ID(u32, ResourceID);
 TYPEDEF_DISTINCT_ORDERED_ID(u32, ScanoutID);
 };
 
+#define VREND_MAX_CTX 64
+
+#define VIRGL_BIND_DEPTH_STENCIL (1 << 0)
+#define VIRGL_BIND_RENDER_TARGET (1 << 1)
+#define VIRGL_BIND_SAMPLER_VIEW (1 << 3)
+#define VIRGL_BIND_VERTEX_BUFFER (1 << 4)
+#define VIRGL_BIND_INDEX_BUFFER (1 << 5)
+#define VIRGL_BIND_CONSTANT_BUFFER (1 << 6)
+#define VIRGL_BIND_DISPLAY_TARGET (1 << 7)
+#define VIRGL_BIND_COMMAND_ARGS (1 << 8)
+#define VIRGL_BIND_STREAM_OUTPUT (1 << 11)
+#define VIRGL_BIND_SHADER_BUFFER (1 << 14)
+#define VIRGL_BIND_QUERY_BUFFER (1 << 15)
+#define VIRGL_BIND_CURSOR (1 << 16)
+#define VIRGL_BIND_CUSTOM (1 << 17)
+#define VIRGL_BIND_SCANOUT (1 << 18)
+
 namespace Kernel::Graphics::VirtIOGPU::Protocol {
 
 // Specification equivalent: enum virtio_gpu_ctrl_type
@@ -32,6 +50,18 @@ enum class CommandType : u32 {
     VIRTIO_GPU_CMD_GET_CAPSET,
     VIRTIO_GPU_CMD_GET_EDID,
 
+    /* 3d commands */
+    VIRTIO_GPU_CMD_CTX_CREATE = 0x0200,
+    VIRTIO_GPU_CMD_CTX_DESTROY,
+    VIRTIO_GPU_CMD_CTX_ATTACH_RESOURCE,
+    VIRTIO_GPU_CMD_CTX_DETACH_RESOURCE,
+    VIRTIO_GPU_CMD_RESOURCE_CREATE_3D,
+    VIRTIO_GPU_CMD_TRANSFER_TO_HOST_3D,
+    VIRTIO_GPU_CMD_TRANSFER_FROM_HOST_3D,
+    VIRTIO_GPU_CMD_SUBMIT_3D,
+    VIRTIO_GPU_CMD_RESOURCE_MAP_BLOB,
+    VIRTIO_GPU_CMD_RESOURCE_UNMAP_BLOB,
+
     /* cursor commands */
     VIRTIO_GPU_CMD_UPDATE_CURSOR = 0x0300,
     VIRTIO_GPU_CMD_MOVE_CURSOR,
@@ -52,6 +82,54 @@ enum class CommandType : u32 {
     VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER,
 };
 
+enum class ObjectType : u32 {
+    NONE,
+    BLEND,
+    RASTERIZER,
+    DSA,
+    SHADER,
+    VERTEX_ELEMENTS,
+    SAMPLER_VIEW,
+    SAMPLER_STATE,
+    SURFACE,
+    QUERY,
+    STREAMOUT_TARGET,
+    MSAA_SURFACE,
+    MAX_OBJECTS,
+};
+
+enum class PipeTextureTarget : u32 {
+    BUFFER = 0,
+    TEXTURE_1D,
+    TEXTURE_2D,
+    TEXTURE_3D,
+    TEXTURE_CUBE,
+    TEXTURE_RECT,
+    TEXTURE_1D_ARRAY,
+    TEXTURE_2D_ARRAY,
+    TEXTURE_CUBE_ARRAY,
+    MAX
+};
+
+enum class PipePrimitiveTypes : u32 {
+    POINTS = 0,
+    LINES,
+    LINE_LOOP,
+    LINE_STRIP,
+    TRIANGLES,
+    TRIANGLE_STRIP,
+    TRIANGLE_FAN,
+    QUADS,
+    QUAD_STRIP,
+    POLYGON,
+    LINES_ADJACENCY,
+    LINE_STRIP_ADJACENCY,
+    TRIANGLES_ADJACENCY,
+    TRIANGLE_STRIP_ADJACENCY,
+    PATCHES,
+    MAX
+};
+
 // Specification equivalent: struct virtio_gpu_ctrl_hdr
 struct ControlHeader {
     u32 type;
@@ -103,6 +181,23 @@ struct ResourceCreate2D {
     u32 height;
 };
 
+// Specification equivalent: struct virtio_gpu_resource_create_3d
+struct ResourceCreate3D {
+    ControlHeader header;
+    u32 resource_id;
+    u32 target;
+    u32 format;
+    u32 bind;
+    u32 width;
+    u32 height;
+    u32 depth;
+    u32 array_size;
+    u32 last_level;
+    u32 nr_samples;
+    u32 flags;
+    u32 padding;
+};
+
 // Specification equivalent: struct virtio_gpu_resource_unref
 struct ResourceUnref {
     ControlHeader header;
@@ -171,4 +266,68 @@ struct GetEDIDResponse {
     u8 edid[1024];
 };
 
+// No equivalent in specification
+struct ContextCreate {
+    ControlHeader header;
+    u32 name_length;
+    u32 padding;
+    AK::Array<char, 64> debug_name;
+};
+
+static_assert(sizeof(ContextCreate::debug_name) == 64);
+
+// No equivalent in specification
+struct ContextAttachResource {
+    ControlHeader header;
+    u32 resource_id;
+    u32 padding;
+};
+
+// No equivalent in specification
+struct CommandSubmit {
+    ControlHeader header;
+    u32 size;
+    u32 padding;
+};
+
+namespace Gallium {
+
+enum class PipeTextureTarget : u32 {
+    BUFFER,
+    TEXTURE_1D,
+    TEXTURE_2D,
+    TEXTURE_3D,
+    TEXTURE_CUBE,
+    TEXTURE_RECT,
+    TEXTURE_1D_ARRAY,
+    TEXTURE_2D_ARRAY,
+    TEXTURE_CUBE_ARRAY,
+    MAX_TEXTURE_TYPES,
+};
+
+enum class ShaderType : u32 {
+    SHADER_VERTEX = 0,
+    SHADER_FRAGMENT,
+    SHADER_GEOMETRY,
+    SHADER_TESS_CTRL,
+    SHADER_TESS_EVAL,
+    SHADER_COMPUTE,
+    SHADER_TYPES
+};
+
+}
+
+struct Resource3DSpecification {
+    Gallium::PipeTextureTarget target;
+    u32 format;
+    u32 bind;
+    u32 width;
+    u32 height;
+    u32 depth;
+    u32 array_size;
+    u32 last_level;
+    u32 nr_samples;
+    u32 flags;
+};
+
 }