diff options
Diffstat (limited to 'drivers/gpu/drm/virtio/virtgpu_gem.c')
| -rw-r--r-- | drivers/gpu/drm/virtio/virtgpu_gem.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/drivers/gpu/drm/virtio/virtgpu_gem.c b/drivers/gpu/drm/virtio/virtgpu_gem.c new file mode 100644 index 000000000000..cfa0d27150bd --- /dev/null +++ b/drivers/gpu/drm/virtio/virtgpu_gem.c @@ -0,0 +1,140 @@ +/* + * Copyright (C) 2015 Red Hat, Inc. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial + * portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE + * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +#include <drm/drmP.h> +#include "virtgpu_drv.h" + +void virtio_gpu_gem_free_object(struct drm_gem_object *gem_obj) +{ + struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(gem_obj); + + if (obj) + virtio_gpu_object_unref(&obj); +} + +struct virtio_gpu_object *virtio_gpu_alloc_object(struct drm_device *dev, + size_t size, bool kernel, + bool pinned) +{ + struct virtio_gpu_device *vgdev = dev->dev_private; + struct virtio_gpu_object *obj; + int ret; + + ret = virtio_gpu_object_create(vgdev, size, kernel, pinned, &obj); + if (ret) + return ERR_PTR(ret); + + return obj; +} + +int virtio_gpu_gem_create(struct drm_file *file, + struct drm_device *dev, + uint64_t size, + struct drm_gem_object **obj_p, + uint32_t *handle_p) +{ + struct virtio_gpu_object *obj; + int ret; + u32 handle; + + obj = virtio_gpu_alloc_object(dev, size, false, false); + if (IS_ERR(obj)) + return PTR_ERR(obj); + + ret = drm_gem_handle_create(file, &obj->gem_base, &handle); + if (ret) { + drm_gem_object_release(&obj->gem_base); + return ret; + } + + *obj_p = &obj->gem_base; + + /* drop reference from allocate - handle holds it now */ + drm_gem_object_unreference_unlocked(&obj->gem_base); + + *handle_p = handle; + return 0; +} + +int virtio_gpu_mode_dumb_create(struct drm_file *file_priv, + struct drm_device *dev, + struct drm_mode_create_dumb *args) +{ + struct virtio_gpu_device *vgdev = dev->dev_private; + struct drm_gem_object *gobj; + struct virtio_gpu_object *obj; + int ret; + uint32_t pitch; + uint32_t resid; + + pitch = args->width * ((args->bpp + 1) / 8); + args->size = pitch * args->height; + args->size = ALIGN(args->size, PAGE_SIZE); + + ret = virtio_gpu_gem_create(file_priv, dev, args->size, &gobj, + &args->handle); + if (ret) + goto fail; + + virtio_gpu_resource_id_get(vgdev, &resid); + virtio_gpu_cmd_create_resource(vgdev, resid, + 2, args->width, args->height); + + /* attach the object to the resource */ + obj = gem_to_virtio_gpu_obj(gobj); + ret = virtio_gpu_object_attach(vgdev, obj, resid, NULL); + if (ret) + goto fail; + + obj->dumb = true; + args->pitch = pitch; + return ret; + +fail: + return ret; +} + +int virtio_gpu_mode_dumb_destroy(struct drm_file *file_priv, + struct drm_device *dev, + uint32_t handle) +{ + return drm_gem_handle_delete(file_priv, handle); +} + +int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv, + struct drm_device *dev, + uint32_t handle, uint64_t *offset_p) +{ + struct drm_gem_object *gobj; + struct virtio_gpu_object *obj; + BUG_ON(!offset_p); + gobj = drm_gem_object_lookup(dev, file_priv, handle); + if (gobj == NULL) + return -ENOENT; + obj = gem_to_virtio_gpu_obj(gobj); + *offset_p = virtio_gpu_object_mmap_offset(obj); + drm_gem_object_unreference_unlocked(gobj); + return 0; +} |