[PATCH v1 3/7] drm/virtio: implement userptr: probe for the feature
Honglei Huang
honglei1.huang at amd.com
Fri Feb 28 05:36:46 UTC 2025
From: Honglei Huang <Honglei1.Huang at amd.com>
Add probe code path for virtio gpu userptr.
Signed-off-by: Honglei Huang <Honglei1.Huang at amd.com>
---
drivers/gpu/drm/virtio/virtgpu_debugfs.c | 1 +
drivers/gpu/drm/virtio/virtgpu_drv.c | 1 +
drivers/gpu/drm/virtio/virtgpu_drv.h | 1 +
drivers/gpu/drm/virtio/virtgpu_kms.c | 8 ++++++--
4 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/virtio/virtgpu_debugfs.c b/drivers/gpu/drm/virtio/virtgpu_debugfs.c
index 853dd9aa397e..da9fa034db0e 100644
--- a/drivers/gpu/drm/virtio/virtgpu_debugfs.c
+++ b/drivers/gpu/drm/virtio/virtgpu_debugfs.c
@@ -57,6 +57,7 @@ static int virtio_gpu_features(struct seq_file *m, void *data)
virtio_gpu_add_bool(m, "context init", vgdev->has_context_init);
virtio_gpu_add_int(m, "cap sets", vgdev->num_capsets);
virtio_gpu_add_int(m, "scanouts", vgdev->num_scanouts);
+ virtio_gpu_add_int(m, "blob userptr", vgdev->has_resource_userptr);
if (vgdev->host_visible_region.len) {
seq_printf(m, "%-16s : 0x%lx +0x%lx\n", "host visible region",
(unsigned long)vgdev->host_visible_region.addr,
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.c b/drivers/gpu/drm/virtio/virtgpu_drv.c
index ffca6e2e1c9a..d79558139084 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.c
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.c
@@ -151,6 +151,7 @@ static unsigned int features[] = {
VIRTIO_GPU_F_RESOURCE_UUID,
VIRTIO_GPU_F_RESOURCE_BLOB,
VIRTIO_GPU_F_CONTEXT_INIT,
+ VIRTIO_GPU_F_RESOURCE_USERPTR,
};
static struct virtio_driver virtio_gpu_driver = {
.feature_table = features,
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h
index 64c236169db8..7bdcbaa20ef1 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.h
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.h
@@ -249,6 +249,7 @@ struct virtio_gpu_device {
bool has_resource_blob;
bool has_host_visible;
bool has_context_init;
+ bool has_resource_userptr;
struct virtio_shm_region host_visible_region;
struct drm_mm host_visible_mm;
diff --git a/drivers/gpu/drm/virtio/virtgpu_kms.c b/drivers/gpu/drm/virtio/virtgpu_kms.c
index 7dfb2006c561..3d5158caef46 100644
--- a/drivers/gpu/drm/virtio/virtgpu_kms.c
+++ b/drivers/gpu/drm/virtio/virtgpu_kms.c
@@ -174,6 +174,9 @@ int virtio_gpu_init(struct virtio_device *vdev, struct drm_device *dev)
if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_RESOURCE_BLOB)) {
vgdev->has_resource_blob = true;
}
+ if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_RESOURCE_USERPTR)) {
+ vgdev->has_resource_userptr = true;
+ }
if (virtio_get_shm_region(vgdev->vdev, &vgdev->host_visible_region,
VIRTIO_GPU_SHM_ID_HOST_VISIBLE)) {
if (!devm_request_mem_region(&vgdev->vdev->dev,
@@ -197,11 +200,12 @@ int virtio_gpu_init(struct virtio_device *vdev, struct drm_device *dev)
vgdev->has_context_init = true;
}
- DRM_INFO("features: %cvirgl %cedid %cresource_blob %chost_visible",
+ DRM_INFO("features: %cvirgl %cedid %cresource_blob %chost_visible %cresource_userptr",
vgdev->has_virgl_3d ? '+' : '-',
vgdev->has_edid ? '+' : '-',
vgdev->has_resource_blob ? '+' : '-',
- vgdev->has_host_visible ? '+' : '-');
+ vgdev->has_host_visible ? '+' : '-',
+ vgdev->has_resource_userptr ? '+' : '-');
DRM_INFO("features: %ccontext_init\n",
vgdev->has_context_init ? '+' : '-');
--
2.34.1
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