Gerd Hoffmann
2019-Jun-20 06:07 UTC
[PATCH v4 07/12] drm/virtio: add virtio_gpu_object_array & helpers
Some helper functions to manage an array of gem objects.
v4: make them virtio-private instead of generic helpers.
Signed-off-by: Gerd Hoffmann <kraxel at redhat.com>
---
drivers/gpu/drm/virtio/virtgpu_drv.h | 10 ++++++
drivers/gpu/drm/virtio/virtgpu_gem.c | 50 ++++++++++++++++++++++++++++
2 files changed, 60 insertions(+)
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h
b/drivers/gpu/drm/virtio/virtgpu_drv.h
index 07f6001ea91e..98d646789d23 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.h
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.h
@@ -84,6 +84,11 @@ struct virtio_gpu_object {
#define gem_to_virtio_gpu_obj(gobj) \
container_of((gobj), struct virtio_gpu_object, gem_base)
+struct virtio_gpu_object_array {
+ u32 nents;
+ struct drm_gem_object *objs[];
+};
+
struct virtio_gpu_vbuffer;
struct virtio_gpu_device;
@@ -251,6 +256,11 @@ int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
struct drm_device *dev,
uint32_t handle, uint64_t *offset_p);
+struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents);
+struct virtio_gpu_object_array*
+virtio_gpu_array_from_handles(struct drm_file *drm_file, u32 *handles, u32
nents);
+void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs);
+
/* virtio vg */
int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev);
void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev);
diff --git a/drivers/gpu/drm/virtio/virtgpu_gem.c
b/drivers/gpu/drm/virtio/virtgpu_gem.c
index 9c9ad3b14080..456cc382ce68 100644
--- a/drivers/gpu/drm/virtio/virtgpu_gem.c
+++ b/drivers/gpu/drm/virtio/virtgpu_gem.c
@@ -169,3 +169,53 @@ void virtio_gpu_gem_object_close(struct drm_gem_object
*obj,
qobj->hw_res_handle);
virtio_gpu_object_unreserve(qobj);
}
+
+struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents)
+{
+ struct virtio_gpu_object_array *objs;
+ size_t size = sizeof(*objs) + sizeof(objs->objs[0]) * nents;
+
+ objs = kzalloc(size, GFP_KERNEL);
+ if (!objs)
+ return NULL;
+
+ objs->nents = nents;
+ return objs;
+}
+
+static void virtio_gpu_array_free(struct virtio_gpu_object_array *objs)
+{
+ kfree(objs);
+}
+
+struct virtio_gpu_object_array*
+virtio_gpu_array_from_handles(struct drm_file *drm_file, u32 *handles, u32
nents)
+{
+ struct virtio_gpu_object_array *objs;
+ u32 i;
+
+ objs = virtio_gpu_array_alloc(nents);
+ if (!objs)
+ return NULL;
+
+ for (i = 0; i < nents; i++) {
+ objs->objs[i] = drm_gem_object_lookup(drm_file, handles[i]);
+ if (!objs->objs[i]) {
+ virtio_gpu_array_put_free(objs);
+ return NULL;
+ }
+ }
+ return objs;
+}
+
+void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs)
+{
+ u32 i;
+
+ for (i = 0; i < objs->nents; i++) {
+ if (!objs->objs[i])
+ continue;
+ drm_gem_object_put_unlocked(objs->objs[i]);
+ }
+ virtio_gpu_array_free(objs);
+}
--
2.18.1
Chia-I Wu
2019-Jun-27 00:49 UTC
[PATCH v4 07/12] drm/virtio: add virtio_gpu_object_array & helpers
On Wed, Jun 19, 2019 at 11:08 PM Gerd Hoffmann <kraxel at redhat.com> wrote:> > Some helper functions to manage an array of gem objects. > > v4: make them virtio-private instead of generic helpers. > > Signed-off-by: Gerd Hoffmann <kraxel at redhat.com> > --- > drivers/gpu/drm/virtio/virtgpu_drv.h | 10 ++++++ > drivers/gpu/drm/virtio/virtgpu_gem.c | 50 ++++++++++++++++++++++++++++ > 2 files changed, 60 insertions(+) > > diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h > index 07f6001ea91e..98d646789d23 100644 > --- a/drivers/gpu/drm/virtio/virtgpu_drv.h > +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h > @@ -84,6 +84,11 @@ struct virtio_gpu_object { > #define gem_to_virtio_gpu_obj(gobj) \ > container_of((gobj), struct virtio_gpu_object, gem_base) > > +struct virtio_gpu_object_array { > + u32 nents; > + struct drm_gem_object *objs[]; > +}; > + > struct virtio_gpu_vbuffer; > struct virtio_gpu_device; > > @@ -251,6 +256,11 @@ int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv, > struct drm_device *dev, > uint32_t handle, uint64_t *offset_p); > > +struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents); > +struct virtio_gpu_object_array* > +virtio_gpu_array_from_handles(struct drm_file *drm_file, u32 *handles, u32 nents); > +void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs); > + > /* virtio vg */ > int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev); > void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev); > diff --git a/drivers/gpu/drm/virtio/virtgpu_gem.c b/drivers/gpu/drm/virtio/virtgpu_gem.c > index 9c9ad3b14080..456cc382ce68 100644 > --- a/drivers/gpu/drm/virtio/virtgpu_gem.c > +++ b/drivers/gpu/drm/virtio/virtgpu_gem.c > @@ -169,3 +169,53 @@ void virtio_gpu_gem_object_close(struct drm_gem_object *obj, > qobj->hw_res_handle); > virtio_gpu_object_unreserve(qobj); > } > + > +struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents) > +{ > + struct virtio_gpu_object_array *objs; > + size_t size = sizeof(*objs) + sizeof(objs->objs[0]) * nents; > + > + objs = kzalloc(size, GFP_KERNEL);It seems unlikely to get wrong. Use kmalloc instead?> + if (!objs) > + return NULL; > + > + objs->nents = nents; > + return objs; > +} > + > +static void virtio_gpu_array_free(struct virtio_gpu_object_array *objs) > +{ > + kfree(objs); > +} > + > +struct virtio_gpu_object_array* > +virtio_gpu_array_from_handles(struct drm_file *drm_file, u32 *handles, u32 nents) > +{ > + struct virtio_gpu_object_array *objs; > + u32 i; > + > + objs = virtio_gpu_array_alloc(nents); > + if (!objs) > + return NULL; > + > + for (i = 0; i < nents; i++) { > + objs->objs[i] = drm_gem_object_lookup(drm_file, handles[i]); > + if (!objs->objs[i]) { > + virtio_gpu_array_put_free(objs);Set objs->nents to i before calling i915_gem_object_lookup;> + return NULL;Should we distinguish ENOMEM and ENOENT?> + } > + } > + return objs; > +} > + > +void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs) > +{ > + u32 i; > + > + for (i = 0; i < objs->nents; i++) { > + if (!objs->objs[i]) > + continue;The check can be removed if the change in virtio_gpu_array_from_handles.> + drm_gem_object_put_unlocked(objs->objs[i]); > + } > + virtio_gpu_array_free(objs); > +} > -- > 2.18.1 > > _______________________________________________ > dri-devel mailing list > dri-devel at lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/dri-devel