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/*
* 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 int handle;
handle++;
*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,
.vm_ops = &drm_gem_shmem_vm_ops,
};
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;
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;
}
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