| /* |
| * 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 <linux/moduleparam.h> |
| |
| #include "virtgpu_drv.h" |
| |
| static int virtio_gpu_virglrenderer_workaround = 1; |
| module_param_named(virglhack, virtio_gpu_virglrenderer_workaround, int, 0400); |
| |
| static int virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev, |
| uint32_t *resid) |
| { |
| if (virtio_gpu_virglrenderer_workaround) { |
| /* |
| * Hack to avoid re-using resource IDs. |
| * |
| * virglrenderer versions up to (and including) 0.7.0 |
| * can't deal with that. virglrenderer commit |
| * "f91a9dd35715 Fix unlinking resources from hash |
| * table." (Feb 2019) fixes the bug. |
| */ |
| static atomic_t seqno = ATOMIC_INIT(0); |
| int handle = atomic_inc_return(&seqno); |
| *resid = handle + 1; |
| } else { |
| int handle = ida_alloc(&vgdev->resource_ida, GFP_KERNEL); |
| if (handle < 0) |
| return handle; |
| *resid = handle + 1; |
| } |
| return 0; |
| } |
| |
| static void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id) |
| { |
| if (!virtio_gpu_virglrenderer_workaround) { |
| ida_free(&vgdev->resource_ida, id - 1); |
| } |
| } |
| |
| static void virtio_gpu_free_object(struct drm_gem_object *obj) |
| { |
| struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj); |
| struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private; |
| |
| if (bo->pages) |
| virtio_gpu_object_detach(vgdev, bo); |
| if (bo->created) |
| virtio_gpu_cmd_unref_resource(vgdev, bo->hw_res_handle); |
| virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle); |
| |
| drm_gem_shmem_free_object(obj); |
| } |
| |
| static const struct drm_gem_object_funcs virtio_gpu_gem_funcs = { |
| .free = virtio_gpu_free_object, |
| .open = virtio_gpu_gem_object_open, |
| .close = virtio_gpu_gem_object_close, |
| |
| .print_info = drm_gem_shmem_print_info, |
| .pin = drm_gem_shmem_pin, |
| .unpin = drm_gem_shmem_unpin, |
| .get_sg_table = drm_gem_shmem_get_sg_table, |
| .vmap = drm_gem_shmem_vmap, |
| .vunmap = drm_gem_shmem_vunmap, |
| .mmap = &drm_gem_shmem_mmap, |
| }; |
| |
| struct drm_gem_object *virtio_gpu_create_object(struct drm_device *dev, |
| size_t size) |
| { |
| struct virtio_gpu_object *bo; |
| |
| bo = kzalloc(sizeof(*bo), GFP_KERNEL); |
| if (!bo) |
| return NULL; |
| |
| bo->base.base.funcs = &virtio_gpu_gem_funcs; |
| bo->base.map_cached = true; |
| return &bo->base.base; |
| } |
| |
| int virtio_gpu_object_create(struct virtio_gpu_device *vgdev, |
| struct virtio_gpu_object_params *params, |
| struct virtio_gpu_object **bo_ptr, |
| struct virtio_gpu_fence *fence) |
| { |
| struct virtio_gpu_object_array *objs = NULL; |
| struct drm_gem_shmem_object *shmem_obj; |
| struct virtio_gpu_object *bo; |
| int ret; |
| |
| *bo_ptr = NULL; |
| |
| params->size = roundup(params->size, PAGE_SIZE); |
| shmem_obj = drm_gem_shmem_create(vgdev->ddev, params->size); |
| if (IS_ERR(shmem_obj)) |
| return PTR_ERR(shmem_obj); |
| bo = gem_to_virtio_gpu_obj(&shmem_obj->base); |
| |
| ret = virtio_gpu_resource_id_get(vgdev, &bo->hw_res_handle); |
| if (ret < 0) |
| goto err_free_gem; |
| |
| bo->dumb = params->dumb; |
| |
| if (fence) { |
| ret = -ENOMEM; |
| objs = virtio_gpu_array_alloc(1); |
| if (!objs) |
| goto err_put_id; |
| virtio_gpu_array_add_obj(objs, &bo->base.base); |
| |
| ret = virtio_gpu_array_lock_resv(objs); |
| if (ret != 0) |
| goto err_put_objs; |
| } |
| |
| if (params->virgl) { |
| virtio_gpu_cmd_resource_create_3d(vgdev, bo, params, |
| objs, fence); |
| } else { |
| virtio_gpu_cmd_create_resource(vgdev, bo, params, |
| objs, fence); |
| } |
| |
| ret = virtio_gpu_object_attach(vgdev, bo, NULL); |
| if (ret != 0) { |
| virtio_gpu_free_object(&shmem_obj->base); |
| return ret; |
| } |
| |
| *bo_ptr = bo; |
| return 0; |
| |
| err_put_objs: |
| virtio_gpu_array_put_free(objs); |
| err_put_id: |
| virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle); |
| err_free_gem: |
| drm_gem_shmem_free_object(&shmem_obj->base); |
| return ret; |
| } |