248 lines
6.9 KiB
C
248 lines
6.9 KiB
C
/*
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* Copyright (C) 2015 Red Hat, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <linux/dma-mapping.h>
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#include <linux/moduleparam.h>
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#include "virtgpu_drv.h"
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static int virtio_gpu_virglrenderer_workaround = 1;
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module_param_named(virglhack, virtio_gpu_virglrenderer_workaround, int, 0400);
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int virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev, uint32_t *resid)
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{
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if (virtio_gpu_virglrenderer_workaround) {
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/*
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* Hack to avoid re-using resource IDs.
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*
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* virglrenderer versions up to (and including) 0.7.0
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* can't deal with that. virglrenderer commit
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* "f91a9dd35715 Fix unlinking resources from hash
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* table." (Feb 2019) fixes the bug.
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*/
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static atomic_t seqno = ATOMIC_INIT(0);
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int handle = atomic_inc_return(&seqno);
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*resid = handle + 1;
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} else {
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int handle = ida_alloc(&vgdev->resource_ida, GFP_KERNEL);
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if (handle < 0)
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return handle;
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*resid = handle + 1;
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}
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return 0;
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}
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static void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id)
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{
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if (!virtio_gpu_virglrenderer_workaround) {
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ida_free(&vgdev->resource_ida, id - 1);
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}
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}
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void virtio_gpu_cleanup_object(struct virtio_gpu_object *bo)
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{
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struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private;
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virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle);
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if (virtio_gpu_is_shmem(bo)) {
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drm_gem_shmem_free(&bo->base);
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} else if (virtio_gpu_is_vram(bo)) {
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struct virtio_gpu_object_vram *vram = to_virtio_gpu_vram(bo);
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spin_lock(&vgdev->host_visible_lock);
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if (drm_mm_node_allocated(&vram->vram_node))
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drm_mm_remove_node(&vram->vram_node);
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spin_unlock(&vgdev->host_visible_lock);
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drm_gem_free_mmap_offset(&vram->base.base.base);
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drm_gem_object_release(&vram->base.base.base);
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kfree(vram);
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}
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}
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static void virtio_gpu_free_object(struct drm_gem_object *obj)
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{
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struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
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struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private;
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if (bo->created) {
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virtio_gpu_cmd_unref_resource(vgdev, bo);
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virtio_gpu_notify(vgdev);
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/* completion handler calls virtio_gpu_cleanup_object() */
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return;
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}
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virtio_gpu_cleanup_object(bo);
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}
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static const struct drm_gem_object_funcs virtio_gpu_shmem_funcs = {
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.free = virtio_gpu_free_object,
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.open = virtio_gpu_gem_object_open,
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.close = virtio_gpu_gem_object_close,
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.print_info = drm_gem_shmem_object_print_info,
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.export = virtgpu_gem_prime_export,
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.pin = drm_gem_shmem_object_pin,
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.unpin = drm_gem_shmem_object_unpin,
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.get_sg_table = drm_gem_shmem_object_get_sg_table,
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.vmap = drm_gem_shmem_object_vmap,
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.vunmap = drm_gem_shmem_object_vunmap,
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.mmap = drm_gem_shmem_object_mmap,
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.vm_ops = &drm_gem_shmem_vm_ops,
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};
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bool virtio_gpu_is_shmem(struct virtio_gpu_object *bo)
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{
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return bo->base.base.funcs == &virtio_gpu_shmem_funcs;
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}
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struct drm_gem_object *virtio_gpu_create_object(struct drm_device *dev,
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size_t size)
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{
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struct virtio_gpu_object_shmem *shmem;
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struct drm_gem_shmem_object *dshmem;
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shmem = kzalloc(sizeof(*shmem), GFP_KERNEL);
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if (!shmem)
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return ERR_PTR(-ENOMEM);
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dshmem = &shmem->base.base;
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dshmem->base.funcs = &virtio_gpu_shmem_funcs;
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return &dshmem->base;
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}
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static int virtio_gpu_object_shmem_init(struct virtio_gpu_device *vgdev,
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struct virtio_gpu_object *bo,
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struct virtio_gpu_mem_entry **ents,
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unsigned int *nents)
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{
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bool use_dma_api = !virtio_has_dma_quirk(vgdev->vdev);
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struct scatterlist *sg;
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struct sg_table *pages;
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int si;
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pages = drm_gem_shmem_get_pages_sgt(&bo->base);
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if (IS_ERR(pages))
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return PTR_ERR(pages);
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if (use_dma_api)
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*nents = pages->nents;
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else
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*nents = pages->orig_nents;
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*ents = kvmalloc_array(*nents,
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sizeof(struct virtio_gpu_mem_entry),
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GFP_KERNEL);
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if (!(*ents)) {
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DRM_ERROR("failed to allocate ent list\n");
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return -ENOMEM;
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}
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if (use_dma_api) {
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for_each_sgtable_dma_sg(pages, sg, si) {
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(*ents)[si].addr = cpu_to_le64(sg_dma_address(sg));
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(*ents)[si].length = cpu_to_le32(sg_dma_len(sg));
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(*ents)[si].padding = 0;
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}
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} else {
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for_each_sgtable_sg(pages, sg, si) {
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(*ents)[si].addr = cpu_to_le64(sg_phys(sg));
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(*ents)[si].length = cpu_to_le32(sg->length);
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(*ents)[si].padding = 0;
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}
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}
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return 0;
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}
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int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
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struct virtio_gpu_object_params *params,
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struct virtio_gpu_object **bo_ptr,
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struct virtio_gpu_fence *fence)
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{
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struct virtio_gpu_object_array *objs = NULL;
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struct drm_gem_shmem_object *shmem_obj;
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struct virtio_gpu_object *bo;
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struct virtio_gpu_mem_entry *ents;
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unsigned int nents;
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int ret;
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*bo_ptr = NULL;
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params->size = roundup(params->size, PAGE_SIZE);
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shmem_obj = drm_gem_shmem_create(vgdev->ddev, params->size);
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if (IS_ERR(shmem_obj))
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return PTR_ERR(shmem_obj);
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bo = gem_to_virtio_gpu_obj(&shmem_obj->base);
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ret = virtio_gpu_resource_id_get(vgdev, &bo->hw_res_handle);
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if (ret < 0)
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goto err_free_gem;
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bo->dumb = params->dumb;
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ret = virtio_gpu_object_shmem_init(vgdev, bo, &ents, &nents);
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if (ret != 0)
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goto err_put_id;
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if (fence) {
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ret = -ENOMEM;
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objs = virtio_gpu_array_alloc(1);
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if (!objs)
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goto err_put_id;
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virtio_gpu_array_add_obj(objs, &bo->base.base);
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ret = virtio_gpu_array_lock_resv(objs);
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if (ret != 0)
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goto err_put_objs;
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}
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if (params->blob) {
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if (params->blob_mem == VIRTGPU_BLOB_MEM_GUEST)
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bo->guest_blob = true;
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virtio_gpu_cmd_resource_create_blob(vgdev, bo, params,
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ents, nents);
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} else if (params->virgl) {
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virtio_gpu_cmd_resource_create_3d(vgdev, bo, params,
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objs, fence);
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virtio_gpu_object_attach(vgdev, bo, ents, nents);
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} else {
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virtio_gpu_cmd_create_resource(vgdev, bo, params,
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objs, fence);
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virtio_gpu_object_attach(vgdev, bo, ents, nents);
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}
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*bo_ptr = bo;
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return 0;
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err_put_objs:
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virtio_gpu_array_put_free(objs);
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err_put_id:
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virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle);
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err_free_gem:
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drm_gem_shmem_free(shmem_obj);
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return ret;
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}
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