[PATCH v1 1/7] virtio-gpu api: add blob userptr resource
Honglei Huang
honglei1.huang at amd.com
Fri Feb 28 05:36:44 UTC 2025
From: Honglei Huang <Honglei1.Huang at amd.com>
Add a new resource for blob resource, called userptr, used for let
host access guest user space memory, to acquire buffer based userptr
feature in virtio GPU.
- The capset VIRTIO_GPU_CAPSET_HSAKMT used for context init,
in this series patches only HSAKMT context can use the userptr
feature. HSAKMT is a GPU compute library in HSA stack, like
the role libdrm in mesa stack.
- New flag VIRTIO_GPU_BLOB_FLAG_USE_USERPTR used in blob create
to indicate the blob create ioctl is used for create a userptr
blob resource.
Signed-off-by: Honglei Huang <Honglei1.Huang at amd.com>
---
include/uapi/linux/virtio_gpu.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/include/uapi/linux/virtio_gpu.h b/include/uapi/linux/virtio_gpu.h
index bf2c9cabd207..4da36a1e62c4 100644
--- a/include/uapi/linux/virtio_gpu.h
+++ b/include/uapi/linux/virtio_gpu.h
@@ -65,6 +65,11 @@
*/
#define VIRTIO_GPU_F_CONTEXT_INIT 4
+/*
+ * VIRTGPU_BLOB_FLAG_USE_USERPTR
+ */
+#define VIRTIO_GPU_F_RESOURCE_USERPTR 5
+
enum virtio_gpu_ctrl_type {
VIRTIO_GPU_UNDEFINED = 0,
@@ -312,6 +317,7 @@ struct virtio_gpu_cmd_submit {
/* 3 is reserved for gfxstream */
#define VIRTIO_GPU_CAPSET_VENUS 4
#define VIRTIO_GPU_CAPSET_DRM 6
+#define VIRTIO_GPU_CAPSET_HSAKMT 8
/* VIRTIO_GPU_CMD_GET_CAPSET_INFO */
struct virtio_gpu_get_capset_info {
@@ -404,6 +410,7 @@ struct virtio_gpu_resource_create_blob {
#define VIRTIO_GPU_BLOB_FLAG_USE_MAPPABLE 0x0001
#define VIRTIO_GPU_BLOB_FLAG_USE_SHAREABLE 0x0002
#define VIRTIO_GPU_BLOB_FLAG_USE_CROSS_DEVICE 0x0004
+#define VIRTIO_GPU_BLOB_FLAG_USE_USERPTR 0x0008
/* zero is invalid blob mem */
__le32 blob_mem;
__le32 blob_flags;
--
2.34.1
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