From: mwezdeck <maksym.wezdecki@xxxxxxxxxxxxxxx>
Userspace can opt-in to not pin pages during resource
create ioctl.
In transfer_*_host and map ioctls check if memory is pinned.
If pages are not pinned, pin it. Otherwise, do nothing.
This change is transparent to userspace.
---
drivers/gpu/drm/virtio/virtgpu_ioctl.c | 9 +++++++++
drivers/gpu/drm/virtio/virtgpu_object.c | 27 ++++++++++++++++---------
include/uapi/drm/virtgpu_drm.h | 9 +++++++++
3 files changed, 35 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
index f6a3a760c32d..c01c5c15701c 100644
--- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c
+++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
@@ -103,6 +103,8 @@ static int virtio_gpu_map_ioctl(struct drm_device *dev, void *data,
struct virtio_gpu_device *vgdev = dev->dev_private;
struct drm_virtgpu_map *virtio_gpu_map = data;
+ virtio_gpu_object_pin(file, vgdev, virtio_gpu_map->handle);
+
return virtio_gpu_mode_dumb_mmap(file, vgdev->ddev,
virtio_gpu_map->handle,
&virtio_gpu_map->offset);
@@ -292,6 +294,9 @@ static int virtio_gpu_getparam_ioctl(struct drm_device *dev, void *data,
case VIRTGPU_PARAM_SUPPORTED_CAPSET_IDs:
value = vgdev->capset_id_mask;
break;
+ case VIRTGPU_PARAM_PIN_ON_DEMAND:
+ value = 1;
+ break;
default:
return -EINVAL;
}
@@ -414,6 +419,8 @@ static int virtio_gpu_transfer_from_host_ioctl(struct drm_device *dev,
goto err_put_free;
}
+ virtio_gpu_object_pin(file, vgdev, args->bo_handle);
+
if (!bo->host3d_blob && (args->stride || args->layer_stride)) {
ret = -EINVAL;
goto err_put_free;
@@ -465,6 +472,8 @@ static int virtio_gpu_transfer_to_host_ioctl(struct drm_device *dev, void *data,
goto err_put_free;
}
+ virtio_gpu_object_pin(file, vgdev, args->bo_handle);
+
if (!vgdev->has_virgl_3d) {
virtio_gpu_cmd_transfer_to_host_2d
(vgdev, offset,
diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c
index 064c50cb9846..183e57ef10e8 100644
--- a/drivers/gpu/drm/virtio/virtgpu_object.c
+++ b/drivers/gpu/drm/virtio/virtgpu_object.c
@@ -219,7 +219,7 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
struct virtio_gpu_mem_entry *ents;
unsigned int nents;
int ret;
-
+ uint32_t backup_flags = params->flags;
*bo_ptr = NULL;
params->size = roundup(params->size, PAGE_SIZE);
@@ -246,13 +246,19 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
goto err_put_objs;
}
- ret = virtio_gpu_object_shmem_init(vgdev, bo, &ents, &nents);
- if (ret != 0) {
- virtio_gpu_array_put_free(objs);
- virtio_gpu_free_object(&shmem_obj->base);
- return ret;
+ if (!(backup_flags & VIRTGPU_NOT_PIN_FLAG)) {
+ ret = virtio_gpu_object_shmem_init(vgdev, bo, &ents, &nents);
+ if (ret != 0) {
+ virtio_gpu_array_put_free(objs);
+ virtio_gpu_free_object(&shmem_obj->base);
+ return ret;
+ }
}
+ // turn off these bits, as renderer doesn't support such bits
+ if (params->flags & VIRTGPU_NOT_PIN_FLAG)
+ params->flags &= ~(VIRTGPU_NOT_PIN_FLAG);
+
if (params->blob) {
if (params->blob_mem == VIRTGPU_BLOB_MEM_GUEST)
bo->guest_blob = true;
@@ -262,11 +268,13 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
} else if (params->virgl) {
virtio_gpu_cmd_resource_create_3d(vgdev, bo, params,
objs, fence);
- virtio_gpu_object_attach(vgdev, bo, ents, nents);
+ if (!(backup_flags & VIRTGPU_NOT_PIN_FLAG))
+ virtio_gpu_object_attach(vgdev, bo, ents, nents);
} else {
virtio_gpu_cmd_create_resource(vgdev, bo, params,
objs, fence);
- virtio_gpu_object_attach(vgdev, bo, ents, nents);
+ if (!(backup_flags & VIRTGPU_NOT_PIN_FLAG))
+ virtio_gpu_object_attach(vgdev, bo, ents, nents);
}
*bo_ptr = bo;
@@ -305,9 +313,8 @@ int virtio_gpu_object_pin(struct drm_file *file,
if (!shmem->pages) {
ret = virtio_gpu_object_shmem_init(vgdev, bo, &ents, &nents);
- if (ret != 0) {
+ if (ret != 0)
return -EFAULT;
- }
virtio_gpu_object_attach(vgdev, bo, ents, nents);
}
diff --git a/include/uapi/drm/virtgpu_drm.h b/include/uapi/drm/virtgpu_drm.h
index bb661d53c0e9..0780234f946f 100644
--- a/include/uapi/drm/virtgpu_drm.h
+++ b/include/uapi/drm/virtgpu_drm.h
@@ -83,12 +83,21 @@ struct drm_virtgpu_execbuffer {
#define VIRTGPU_PARAM_CROSS_DEVICE 5 /* Cross virtio-device resource sharing */
#define VIRTGPU_PARAM_CONTEXT_INIT 6 /* DRM_VIRTGPU_CONTEXT_INIT */
#define VIRTGPU_PARAM_SUPPORTED_CAPSET_IDs 7 /* Bitmask of supported capability set ids */
+#define VIRTGPU_PARAM_PIN_ON_DEMAND 8 /* is pinning on demand available? */
struct drm_virtgpu_getparam {
__u64 param;
__u64 value;
};
+/* it is used in resource_create_ioctl as resource
+ * flag.
+ * First 8 bits of uint32_t and 24th bit
+ * are reserved for user space driver.
+ * Userspace can opt-in to not pin pages.
+ */
+#define VIRTGPU_NOT_PIN_FLAG (1 << 9)
+
/* NO_BO flags? NO resource flag? */
/* resource flag for y_0_top */
struct drm_virtgpu_resource_create {
--
2.30.2
