/* * 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/drm_file.h>#include <drm/drm_fourcc.h> #include "virtgpu_drv.h" static int virtio_gpu_gem_create(struct drm_file *file,				 struct drm_device *dev,				 struct virtio_gpu_object_params *params,				 struct drm_gem_object **obj_p,				 uint32_t *handle_p){	struct virtio_gpu_device *vgdev = dev->dev_private;	struct virtio_gpu_object *obj;	int ret;	u32 handle; 	ret = virtio_gpu_object_create(vgdev, params, &obj, NULL);	if (ret < 0)		return ret; 	ret = drm_gem_handle_create(file, &obj->base.base, &handle);	if (ret) {		drm_gem_object_release(&obj->base.base);		return ret;	} 	*obj_p = &obj->base.base; 	/* drop reference from allocate - handle holds it now */	drm_gem_object_put(&obj->base.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 drm_gem_object *gobj;	struct virtio_gpu_object_params params = { 0 };	struct virtio_gpu_device *vgdev = dev->dev_private;	int ret;	uint32_t pitch; 	if (args->bpp != 32)		return -EINVAL; 	pitch = args->width * 4;	args->size = pitch * args->height;	args->size = ALIGN(args->size, PAGE_SIZE); 	params.format = virtio_gpu_translate_format(DRM_FORMAT_HOST_XRGB8888);	params.width = args->width;	params.height = args->height;	params.size = args->size;	params.dumb = true; 	if (vgdev->has_resource_blob && !vgdev->has_virgl_3d) {		params.blob_mem = VIRTGPU_BLOB_MEM_GUEST;		params.blob_flags = VIRTGPU_BLOB_FLAG_USE_SHAREABLE;		params.blob = true;	} 	ret = virtio_gpu_gem_create(file_priv, dev, &params, &gobj,				    &args->handle);	if (ret)		goto fail; 	args->pitch = pitch;	return ret; fail:	return ret;} int virtio_gpu_gem_object_open(struct drm_gem_object *obj,			       struct drm_file *file){	struct virtio_gpu_device *vgdev = obj->dev->dev_private;	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;	struct virtio_gpu_object_array *objs; 	if (!vgdev->has_virgl_3d)		goto out_notify; 	/* the context might still be missing when the first ioctl is	 * DRM_IOCTL_MODE_CREATE_DUMB or DRM_IOCTL_PRIME_FD_TO_HANDLE	 */	if (!vgdev->has_context_init)		virtio_gpu_create_context(obj->dev, file); 	if (vfpriv->context_created) {		objs = virtio_gpu_array_alloc(1);		if (!objs)			return -ENOMEM;		virtio_gpu_array_add_obj(objs, obj); 		virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id, objs);	} out_notify:	virtio_gpu_notify(vgdev);	return 0;} void virtio_gpu_gem_object_close(struct drm_gem_object *obj,				 struct drm_file *file){	struct virtio_gpu_device *vgdev = obj->dev->dev_private;	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;	struct virtio_gpu_object_array *objs; 	if (!vgdev->has_virgl_3d)		return; 	if (vfpriv->context_created) {		objs = virtio_gpu_array_alloc(1);		if (!objs)			return;		virtio_gpu_array_add_obj(objs, obj); 		virtio_gpu_cmd_context_detach_resource(vgdev, vfpriv->ctx_id,						       objs);	}	virtio_gpu_notify(vgdev);} /* For drm panic */struct virtio_gpu_object_array *virtio_gpu_panic_array_alloc(void){	struct virtio_gpu_object_array *objs; 	objs = kmalloc_obj(struct virtio_gpu_object_array, GFP_ATOMIC);	if (!objs)		return NULL; 	objs->nents = 0;	objs->total = 1;	return objs;} struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents){	struct virtio_gpu_object_array *objs; 	objs = kmalloc_flex(*objs, objs, nents);	if (!objs)		return NULL; 	objs->nents = 0;	objs->total = 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]) {			objs->nents = i;			virtio_gpu_array_put_free(objs);			return NULL;		}	}	objs->nents = i;	return objs;} void virtio_gpu_array_add_obj(struct virtio_gpu_object_array *objs,			      struct drm_gem_object *obj){	if (WARN_ON_ONCE(objs->nents == objs->total))		return; 	drm_gem_object_get(obj);	objs->objs[objs->nents] = obj;	objs->nents++;} int virtio_gpu_array_lock_resv(struct virtio_gpu_object_array *objs){	unsigned int i;	int ret; 	if (objs->nents == 1) {		ret = dma_resv_lock_interruptible(objs->objs[0]->resv, NULL);	} else {		ret = drm_gem_lock_reservations(objs->objs, objs->nents,						&objs->ticket);	}	if (ret)		return ret; 	for (i = 0; i < objs->nents; ++i) {		ret = dma_resv_reserve_fences(objs->objs[i]->resv, 1);		if (ret) {			virtio_gpu_array_unlock_resv(objs);			return ret;		}	}	return ret;} int virtio_gpu_lock_one_resv_uninterruptible(struct virtio_gpu_object_array *objs){	int ret; 	if (objs->nents != 1)		return -EINVAL; 	dma_resv_lock(objs->objs[0]->resv, NULL); 	ret = dma_resv_reserve_fences(objs->objs[0]->resv, 1);	if (ret) {		virtio_gpu_array_unlock_resv(objs);		return ret;	}	return 0;} void virtio_gpu_array_unlock_resv(struct virtio_gpu_object_array *objs){	if (objs->nents == 1) {		dma_resv_unlock(objs->objs[0]->resv);	} else {		drm_gem_unlock_reservations(objs->objs, objs->nents,					    &objs->ticket);	}} void virtio_gpu_array_add_fence(struct virtio_gpu_object_array *objs,				struct dma_fence *fence){	int i; 	for (i = 0; i < objs->nents; i++)		dma_resv_add_fence(objs->objs[i]->resv, fence,				   DMA_RESV_USAGE_WRITE);} void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs){	u32 i; 	if (!objs)		return; 	for (i = 0; i < objs->nents; i++)		drm_gem_object_put(objs->objs[i]);	virtio_gpu_array_free(objs);} void virtio_gpu_array_put_free_delayed(struct virtio_gpu_device *vgdev,				       struct virtio_gpu_object_array *objs){	spin_lock(&vgdev->obj_free_lock);	list_add_tail(&objs->next, &vgdev->obj_free_list);	spin_unlock(&vgdev->obj_free_lock);	schedule_work(&vgdev->obj_free_work);} void virtio_gpu_array_put_free_work(struct work_struct *work){	struct virtio_gpu_device *vgdev =		container_of(work, struct virtio_gpu_device, obj_free_work);	struct virtio_gpu_object_array *objs; 	spin_lock(&vgdev->obj_free_lock);	while (!list_empty(&vgdev->obj_free_list)) {		objs = list_first_entry(&vgdev->obj_free_list,					struct virtio_gpu_object_array, next);		list_del(&objs->next);		spin_unlock(&vgdev->obj_free_lock);		virtio_gpu_array_put_free(objs);		spin_lock(&vgdev->obj_free_lock);	}	spin_unlock(&vgdev->obj_free_lock);}