[PATCH v1 5/7] drm/virtio: advertise base userptr feature to userspace
Honglei Huang
honglei1.huang at amd.com
Fri Feb 28 05:36:48 UTC 2025
From: Honglei Huang <Honglei1.Huang at amd.com>
Introduce the basic userptr feature to userspace.
Signed-off-by: Honglei Huang <Honglei1.Huang at amd.com>
---
drivers/gpu/drm/virtio/virtgpu_ioctl.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
index e4f76f315550..8a89774d0737 100644
--- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c
+++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
@@ -36,7 +36,9 @@
#define VIRTGPU_BLOB_FLAG_USE_MASK (VIRTGPU_BLOB_FLAG_USE_MAPPABLE | \
VIRTGPU_BLOB_FLAG_USE_SHAREABLE | \
- VIRTGPU_BLOB_FLAG_USE_CROSS_DEVICE)
+ VIRTGPU_BLOB_FLAG_USE_CROSS_DEVICE | \
+ VIRTGPU_BLOB_FLAG_USE_USERPTR | \
+ VIRTGPU_BLOB_FLAG_USERPTR_RDONLY)
/* Must be called with &virtio_gpu_fpriv.struct_mutex held. */
static void virtio_gpu_create_context_locked(struct virtio_gpu_device *vgdev,
@@ -444,6 +446,8 @@ static int verify_blob(struct virtio_gpu_device *vgdev,
{
if (!vgdev->has_resource_blob)
return -EINVAL;
+ if (!vgdev->has_resource_userptr && rc_blob->userptr)
+ return -EINVAL;
if (rc_blob->blob_flags & ~VIRTGPU_BLOB_FLAG_USE_MASK)
return -EINVAL;
@@ -489,6 +493,7 @@ static int verify_blob(struct virtio_gpu_device *vgdev,
params->size = rc_blob->size;
params->blob = true;
params->blob_flags = rc_blob->blob_flags;
+ params->userptr = rc_blob->userptr;
return 0;
}
@@ -527,8 +532,10 @@ static int virtio_gpu_resource_create_blob_ioctl(struct drm_device *dev,
vfpriv->ctx_id, NULL, NULL);
}
- if (guest_blob)
+ if (guest_blob && !params.userptr)
ret = virtio_gpu_object_create(vgdev, ¶ms, &bo, NULL);
+ else if (guest_blob && params.userptr)
+ ret = virtio_gpu_userptr_create(vgdev, file, ¶ms, &bo);
else if (!guest_blob && host3d_blob)
ret = virtio_gpu_vram_create(vgdev, ¶ms, &bo);
else
--
2.34.1
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