linux/drivers/gpu/drm/virtio/virtgpu_ioctl.c

589 lines
15 KiB
C

/*
* Copyright (C) 2015 Red Hat, Inc.
* All Rights Reserved.
*
* Authors:
* Dave Airlie
* Alon Levy
*
* 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 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 HOLDER(S) OR AUTHOR(S) 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/file.h>
#include <linux/sync_file.h>
#include <drm/drm_file.h>
#include <drm/ttm/ttm_execbuf_util.h>
#include <drm/virtgpu_drm.h>
#include "virtgpu_drv.h"
static void convert_to_hw_box(struct virtio_gpu_box *dst,
const struct drm_virtgpu_3d_box *src)
{
dst->x = cpu_to_le32(src->x);
dst->y = cpu_to_le32(src->y);
dst->z = cpu_to_le32(src->z);
dst->w = cpu_to_le32(src->w);
dst->h = cpu_to_le32(src->h);
dst->d = cpu_to_le32(src->d);
}
static int virtio_gpu_map_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct virtio_gpu_device *vgdev = dev->dev_private;
struct drm_virtgpu_map *virtio_gpu_map = data;
return virtio_gpu_mode_dumb_mmap(file_priv, vgdev->ddev,
virtio_gpu_map->handle,
&virtio_gpu_map->offset);
}
int virtio_gpu_object_list_validate(struct ww_acquire_ctx *ticket,
struct list_head *head)
{
struct ttm_operation_ctx ctx = { false, false };
struct ttm_validate_buffer *buf;
struct ttm_buffer_object *bo;
struct virtio_gpu_object *qobj;
int ret;
ret = ttm_eu_reserve_buffers(ticket, head, true, NULL, true);
if (ret != 0)
return ret;
list_for_each_entry(buf, head, head) {
bo = buf->bo;
qobj = container_of(bo, struct virtio_gpu_object, tbo);
ret = ttm_bo_validate(bo, &qobj->placement, &ctx);
if (ret) {
ttm_eu_backoff_reservation(ticket, head);
return ret;
}
}
return 0;
}
void virtio_gpu_unref_list(struct list_head *head)
{
struct ttm_validate_buffer *buf;
struct ttm_buffer_object *bo;
struct virtio_gpu_object *qobj;
list_for_each_entry(buf, head, head) {
bo = buf->bo;
qobj = container_of(bo, struct virtio_gpu_object, tbo);
drm_gem_object_put_unlocked(&qobj->gem_base);
}
}
/*
* Usage of execbuffer:
* Relocations need to take into account the full VIRTIO_GPUDrawable size.
* However, the command as passed from user space must *not* contain the initial
* VIRTIO_GPUReleaseInfo struct (first XXX bytes)
*/
static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data,
struct drm_file *drm_file)
{
struct drm_virtgpu_execbuffer *exbuf = data;
struct virtio_gpu_device *vgdev = dev->dev_private;
struct virtio_gpu_fpriv *vfpriv = drm_file->driver_priv;
struct drm_gem_object *gobj;
struct virtio_gpu_fence *out_fence;
struct virtio_gpu_object *qobj;
int ret;
uint32_t *bo_handles = NULL;
void __user *user_bo_handles = NULL;
struct list_head validate_list;
struct ttm_validate_buffer *buflist = NULL;
int i;
struct ww_acquire_ctx ticket;
struct sync_file *sync_file;
int in_fence_fd = exbuf->fence_fd;
int out_fence_fd = -1;
void *buf;
if (vgdev->has_virgl_3d == false)
return -ENOSYS;
if ((exbuf->flags & ~VIRTGPU_EXECBUF_FLAGS))
return -EINVAL;
exbuf->fence_fd = -1;
if (exbuf->flags & VIRTGPU_EXECBUF_FENCE_FD_IN) {
struct dma_fence *in_fence;
in_fence = sync_file_get_fence(in_fence_fd);
if (!in_fence)
return -EINVAL;
/*
* Wait if the fence is from a foreign context, or if the fence
* array contains any fence from a foreign context.
*/
ret = 0;
if (!dma_fence_match_context(in_fence, vgdev->fence_drv.context))
ret = dma_fence_wait(in_fence, true);
dma_fence_put(in_fence);
if (ret)
return ret;
}
if (exbuf->flags & VIRTGPU_EXECBUF_FENCE_FD_OUT) {
out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
if (out_fence_fd < 0)
return out_fence_fd;
}
INIT_LIST_HEAD(&validate_list);
if (exbuf->num_bo_handles) {
bo_handles = kvmalloc_array(exbuf->num_bo_handles,
sizeof(uint32_t), GFP_KERNEL);
buflist = kvmalloc_array(exbuf->num_bo_handles,
sizeof(struct ttm_validate_buffer),
GFP_KERNEL | __GFP_ZERO);
if (!bo_handles || !buflist) {
ret = -ENOMEM;
goto out_unused_fd;
}
user_bo_handles = u64_to_user_ptr(exbuf->bo_handles);
if (copy_from_user(bo_handles, user_bo_handles,
exbuf->num_bo_handles * sizeof(uint32_t))) {
ret = -EFAULT;
goto out_unused_fd;
}
for (i = 0; i < exbuf->num_bo_handles; i++) {
gobj = drm_gem_object_lookup(drm_file, bo_handles[i]);
if (!gobj) {
ret = -ENOENT;
goto out_unused_fd;
}
qobj = gem_to_virtio_gpu_obj(gobj);
buflist[i].bo = &qobj->tbo;
list_add(&buflist[i].head, &validate_list);
}
kvfree(bo_handles);
bo_handles = NULL;
}
ret = virtio_gpu_object_list_validate(&ticket, &validate_list);
if (ret)
goto out_free;
buf = memdup_user(u64_to_user_ptr(exbuf->command), exbuf->size);
if (IS_ERR(buf)) {
ret = PTR_ERR(buf);
goto out_unresv;
}
out_fence = virtio_gpu_fence_alloc(vgdev);
if(!out_fence) {
ret = -ENOMEM;
goto out_memdup;
}
if (out_fence_fd >= 0) {
sync_file = sync_file_create(&out_fence->f);
if (!sync_file) {
dma_fence_put(&out_fence->f);
ret = -ENOMEM;
goto out_memdup;
}
exbuf->fence_fd = out_fence_fd;
fd_install(out_fence_fd, sync_file->file);
}
virtio_gpu_cmd_submit(vgdev, buf, exbuf->size,
vfpriv->ctx_id, out_fence);
ttm_eu_fence_buffer_objects(&ticket, &validate_list, &out_fence->f);
/* fence the command bo */
virtio_gpu_unref_list(&validate_list);
kvfree(buflist);
return 0;
out_memdup:
kfree(buf);
out_unresv:
ttm_eu_backoff_reservation(&ticket, &validate_list);
out_free:
virtio_gpu_unref_list(&validate_list);
out_unused_fd:
kvfree(bo_handles);
kvfree(buflist);
if (out_fence_fd >= 0)
put_unused_fd(out_fence_fd);
return ret;
}
static int virtio_gpu_getparam_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct virtio_gpu_device *vgdev = dev->dev_private;
struct drm_virtgpu_getparam *param = data;
int value;
switch (param->param) {
case VIRTGPU_PARAM_3D_FEATURES:
value = vgdev->has_virgl_3d == true ? 1 : 0;
break;
case VIRTGPU_PARAM_CAPSET_QUERY_FIX:
value = 1;
break;
default:
return -EINVAL;
}
if (copy_to_user(u64_to_user_ptr(param->value), &value, sizeof(int)))
return -EFAULT;
return 0;
}
static int virtio_gpu_resource_create_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct virtio_gpu_device *vgdev = dev->dev_private;
struct drm_virtgpu_resource_create *rc = data;
struct virtio_gpu_fence *fence;
int ret;
struct virtio_gpu_object *qobj;
struct drm_gem_object *obj;
uint32_t handle = 0;
struct virtio_gpu_object_params params = { 0 };
if (vgdev->has_virgl_3d == false) {
if (rc->depth > 1)
return -EINVAL;
if (rc->nr_samples > 1)
return -EINVAL;
if (rc->last_level > 1)
return -EINVAL;
if (rc->target != 2)
return -EINVAL;
if (rc->array_size > 1)
return -EINVAL;
}
params.format = rc->format;
params.width = rc->width;
params.height = rc->height;
params.size = rc->size;
if (vgdev->has_virgl_3d) {
params.virgl = true;
params.target = rc->target;
params.bind = rc->bind;
params.depth = rc->depth;
params.array_size = rc->array_size;
params.last_level = rc->last_level;
params.nr_samples = rc->nr_samples;
params.flags = rc->flags;
}
/* allocate a single page size object */
if (params.size == 0)
params.size = PAGE_SIZE;
fence = virtio_gpu_fence_alloc(vgdev);
if (!fence)
return -ENOMEM;
qobj = virtio_gpu_alloc_object(dev, &params, fence);
dma_fence_put(&fence->f);
if (IS_ERR(qobj))
return PTR_ERR(qobj);
obj = &qobj->gem_base;
ret = drm_gem_handle_create(file_priv, obj, &handle);
if (ret) {
drm_gem_object_release(obj);
return ret;
}
drm_gem_object_put_unlocked(obj);
rc->res_handle = qobj->hw_res_handle; /* similiar to a VM address */
rc->bo_handle = handle;
return 0;
}
static int virtio_gpu_resource_info_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_virtgpu_resource_info *ri = data;
struct drm_gem_object *gobj = NULL;
struct virtio_gpu_object *qobj = NULL;
gobj = drm_gem_object_lookup(file_priv, ri->bo_handle);
if (gobj == NULL)
return -ENOENT;
qobj = gem_to_virtio_gpu_obj(gobj);
ri->size = qobj->gem_base.size;
ri->res_handle = qobj->hw_res_handle;
drm_gem_object_put_unlocked(gobj);
return 0;
}
static int virtio_gpu_transfer_from_host_ioctl(struct drm_device *dev,
void *data,
struct drm_file *file)
{
struct virtio_gpu_device *vgdev = dev->dev_private;
struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
struct drm_virtgpu_3d_transfer_from_host *args = data;
struct ttm_operation_ctx ctx = { true, false };
struct drm_gem_object *gobj = NULL;
struct virtio_gpu_object *qobj = NULL;
struct virtio_gpu_fence *fence;
int ret;
u32 offset = args->offset;
struct virtio_gpu_box box;
if (vgdev->has_virgl_3d == false)
return -ENOSYS;
gobj = drm_gem_object_lookup(file, args->bo_handle);
if (gobj == NULL)
return -ENOENT;
qobj = gem_to_virtio_gpu_obj(gobj);
ret = virtio_gpu_object_reserve(qobj, false);
if (ret)
goto out;
ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx);
if (unlikely(ret))
goto out_unres;
convert_to_hw_box(&box, &args->box);
fence = virtio_gpu_fence_alloc(vgdev);
if (!fence) {
ret = -ENOMEM;
goto out_unres;
}
virtio_gpu_cmd_transfer_from_host_3d
(vgdev, qobj->hw_res_handle,
vfpriv->ctx_id, offset, args->level,
&box, fence);
reservation_object_add_excl_fence(qobj->tbo.resv,
&fence->f);
dma_fence_put(&fence->f);
out_unres:
virtio_gpu_object_unreserve(qobj);
out:
drm_gem_object_put_unlocked(gobj);
return ret;
}
static int virtio_gpu_transfer_to_host_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct virtio_gpu_device *vgdev = dev->dev_private;
struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
struct drm_virtgpu_3d_transfer_to_host *args = data;
struct ttm_operation_ctx ctx = { true, false };
struct drm_gem_object *gobj = NULL;
struct virtio_gpu_object *qobj = NULL;
struct virtio_gpu_fence *fence;
struct virtio_gpu_box box;
int ret;
u32 offset = args->offset;
gobj = drm_gem_object_lookup(file, args->bo_handle);
if (gobj == NULL)
return -ENOENT;
qobj = gem_to_virtio_gpu_obj(gobj);
ret = virtio_gpu_object_reserve(qobj, false);
if (ret)
goto out;
ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx);
if (unlikely(ret))
goto out_unres;
convert_to_hw_box(&box, &args->box);
if (!vgdev->has_virgl_3d) {
virtio_gpu_cmd_transfer_to_host_2d
(vgdev, qobj, offset,
box.w, box.h, box.x, box.y, NULL);
} else {
fence = virtio_gpu_fence_alloc(vgdev);
if (!fence) {
ret = -ENOMEM;
goto out_unres;
}
virtio_gpu_cmd_transfer_to_host_3d
(vgdev, qobj,
vfpriv ? vfpriv->ctx_id : 0, offset,
args->level, &box, fence);
reservation_object_add_excl_fence(qobj->tbo.resv,
&fence->f);
dma_fence_put(&fence->f);
}
out_unres:
virtio_gpu_object_unreserve(qobj);
out:
drm_gem_object_put_unlocked(gobj);
return ret;
}
static int virtio_gpu_wait_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_virtgpu_3d_wait *args = data;
struct drm_gem_object *gobj = NULL;
struct virtio_gpu_object *qobj = NULL;
int ret;
bool nowait = false;
gobj = drm_gem_object_lookup(file, args->handle);
if (gobj == NULL)
return -ENOENT;
qobj = gem_to_virtio_gpu_obj(gobj);
if (args->flags & VIRTGPU_WAIT_NOWAIT)
nowait = true;
ret = virtio_gpu_object_wait(qobj, nowait);
drm_gem_object_put_unlocked(gobj);
return ret;
}
static int virtio_gpu_get_caps_ioctl(struct drm_device *dev,
void *data, struct drm_file *file)
{
struct virtio_gpu_device *vgdev = dev->dev_private;
struct drm_virtgpu_get_caps *args = data;
unsigned size, host_caps_size;
int i;
int found_valid = -1;
int ret;
struct virtio_gpu_drv_cap_cache *cache_ent;
void *ptr;
if (vgdev->num_capsets == 0)
return -ENOSYS;
/* don't allow userspace to pass 0 */
if (args->size == 0)
return -EINVAL;
spin_lock(&vgdev->display_info_lock);
for (i = 0; i < vgdev->num_capsets; i++) {
if (vgdev->capsets[i].id == args->cap_set_id) {
if (vgdev->capsets[i].max_version >= args->cap_set_ver) {
found_valid = i;
break;
}
}
}
if (found_valid == -1) {
spin_unlock(&vgdev->display_info_lock);
return -EINVAL;
}
host_caps_size = vgdev->capsets[found_valid].max_size;
/* only copy to user the minimum of the host caps size or the guest caps size */
size = min(args->size, host_caps_size);
list_for_each_entry(cache_ent, &vgdev->cap_cache, head) {
if (cache_ent->id == args->cap_set_id &&
cache_ent->version == args->cap_set_ver) {
spin_unlock(&vgdev->display_info_lock);
goto copy_exit;
}
}
spin_unlock(&vgdev->display_info_lock);
/* not in cache - need to talk to hw */
virtio_gpu_cmd_get_capset(vgdev, found_valid, args->cap_set_ver,
&cache_ent);
copy_exit:
ret = wait_event_timeout(vgdev->resp_wq,
atomic_read(&cache_ent->is_valid), 5 * HZ);
if (!ret)
return -EBUSY;
/* is_valid check must proceed before copy of the cache entry. */
smp_rmb();
ptr = cache_ent->caps_cache;
if (copy_to_user(u64_to_user_ptr(args->addr), ptr, size))
return -EFAULT;
return 0;
}
struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS] = {
DRM_IOCTL_DEF_DRV(VIRTGPU_MAP, virtio_gpu_map_ioctl,
DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VIRTGPU_EXECBUFFER, virtio_gpu_execbuffer_ioctl,
DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VIRTGPU_GETPARAM, virtio_gpu_getparam_ioctl,
DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_CREATE,
virtio_gpu_resource_create_ioctl,
DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_INFO, virtio_gpu_resource_info_ioctl,
DRM_RENDER_ALLOW),
/* make transfer async to the main ring? - no sure, can we
* thread these in the underlying GL
*/
DRM_IOCTL_DEF_DRV(VIRTGPU_TRANSFER_FROM_HOST,
virtio_gpu_transfer_from_host_ioctl,
DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VIRTGPU_TRANSFER_TO_HOST,
virtio_gpu_transfer_to_host_ioctl,
DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VIRTGPU_WAIT, virtio_gpu_wait_ioctl,
DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VIRTGPU_GET_CAPS, virtio_gpu_get_caps_ioctl,
DRM_RENDER_ALLOW),
};