/*
* 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, ¶ms, &gobj,
&args->handle);
if (ret)
goto fail;
args->pitch = pitch;
return ret;
fail:
return ret;
}
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;
BUG_ON(!offset_p);
gobj = drm_gem_object_lookup(file_priv, handle);
if (gobj == NULL)
return -ENOENT;
*offset_p = drm_vma_node_offset_addr(&gobj->vma_node);
drm_gem_object_put(gobj);
return 0;
}
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
*/
virtio_gpu_create_context(obj->dev, file);
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;
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);
}
struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents)
{
struct virtio_gpu_object_array *objs;
objs = kmalloc(struct_size(objs, objs, nents), GFP_KERNEL);
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;
}
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);
}
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