/*
* 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 <linux/uaccess.h>
#include <drm/drm_file.h>
#include <drm/virtgpu_drm.h>
#include "virtgpu_drv.h"
#define VIRTGPU_BLOB_FLAG_USE_MASK (VIRTGPU_BLOB_FLAG_USE_MAPPABLE | \
VIRTGPU_BLOB_FLAG_USE_SHAREABLE | \
VIRTGPU_BLOB_FLAG_USE_CROSS_DEVICE)
/* Must be called with &virtio_gpu_fpriv.struct_mutex held. */
static void virtio_gpu_create_context_locked(struct virtio_gpu_device *vgdev,
struct virtio_gpu_fpriv *vfpriv)
{
if (vfpriv->explicit_debug_name) {
virtio_gpu_cmd_context_create(vgdev, vfpriv->ctx_id,
vfpriv->context_init,
strlen(vfpriv->debug_name),
vfpriv->debug_name);
} else {
char dbgname[TASK_COMM_LEN];
get_task_comm(dbgname, current);
virtio_gpu_cmd_context_create(vgdev, vfpriv->ctx_id,
vfpriv->context_init, strlen(dbgname),
dbgname);
}
vfpriv->context_created = true;
}
void virtio_gpu_create_context(struct drm_device *dev, struct drm_file *file)
{
struct virtio_gpu_device *vgdev = dev->dev_private;
struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
mutex_lock(&vfpriv->context_lock);
if (vfpriv->context_created)
goto out_unlock;
virtio_gpu_create_context_locked(vgdev, vfpriv);
out_unlock:
mutex_unlock(&vfpriv->context_lock);
}
static int virtio_gpu_map_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct virtio_gpu_device *vgdev = dev->dev_private;
struct drm_virtgpu_map *virtio_gpu_map = data;
return virtio_gpu_mode_dumb_mmap(file, vgdev->ddev,
virtio_gpu_map->handle,
&virtio_gpu_map->offset);
}
static int virtio_gpu_getparam_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
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 ? 1 : 0;
break;
case VIRTGPU_PARAM_CAPSET_QUERY_FIX:
value = 1;
break;
case VIRTGPU_PARAM_RESOURCE_BLOB:
value = vgdev->has_resource_blob ? 1 : 0;
break;
case VIRTGPU_PARAM_HOST_VISIBLE:
value = vgdev->has_host_visible ? 1 : 0;
break;
case VIRTGPU_PARAM_CROSS_DEVICE:
value = vgdev->has_resource_assign_uuid ? 1 : 0;
break;
case VIRTGPU_PARAM_CONTEXT_INIT:
value = vgdev->has_context_init ? 1 : 0;
break;
case VIRTGPU_PARAM_SUPPORTED_CAPSET_IDs:
value = vgdev->capset_id_mask;
break;
case VIRTGPU_PARAM_EXPLICIT_DEBUG_NAME:
value = vgdev->has_context_init ? 1 : 0;
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)
{
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) {
virtio_gpu_create_context(dev, file);
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;
} else {
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;
/* allocate a single page size object */
if (params.size == 0)
params.size = PAGE_SIZE;
fence = virtio_gpu_fence_alloc(vgdev, vgdev->fence_drv.context, 0);
if (!fence)
return -ENOMEM;
ret = virtio_gpu_object_create(vgdev, ¶ms, &qobj, fence);
dma_fence_put(&fence->f);
if (ret < 0)
return ret;
obj = &qobj->base.base;
ret = drm_gem_handle_create(file, obj, &handle);
if (ret) {
drm_gem_object_release(obj);
return ret;
}
rc->res_handle = qobj->hw_res_handle; /* similiar to a VM address */
rc->bo_handle = handle;
/*
* The handle owns the reference now. But we must drop our
* remaining reference *after* we no longer need to dereference
* the obj. Otherwise userspace could guess the handle and
* race closing it from another thread.
*/
drm_gem_object_put(obj);
return 0;
}
static int virtio_gpu_resource_info_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
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, ri->bo_handle);
if (gobj == NULL)
return -ENOENT;
qobj = gem_to_virtio_gpu_obj(gobj);
ri->size = qobj->base.base.size;
ri->res_handle = qobj->hw_res_handle;
if (qobj->host3d_blob || qobj->guest_blob)
ri->blob_mem = qobj->blob_mem;
drm_gem_object_put(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 virtio_gpu_object *bo;
struct virtio_gpu_object_array *objs;
struct virtio_gpu_fence *fence;
int ret;
u32 offset = args->offset;
if (vgdev->has_virgl_3d == false)
return -ENOSYS;
virtio_gpu_create_context(dev, file);
objs = virtio_gpu_array_from_handles(file, &args->bo_handle, 1);
if (objs == NULL)
return -ENOENT;
bo = gem_to_virtio_gpu_obj(objs->objs[0]);
if (bo->guest_blob && !bo->host3d_blob) {
ret = -EINVAL;
goto err_put_free;
}
if (!bo->host3d_blob && (args->stride || args->layer_stride)) {
ret = -EINVAL;
goto err_put_free;
}
ret = virtio_gpu_array_lock_resv(objs);
if (ret != 0)
goto err_put_free;
fence = virtio_gpu_fence_alloc(vgdev, vgdev->fence_drv.context, 0);
if (!fence) {
ret = -ENOMEM;
goto err_unlock;
}
virtio_gpu_cmd_transfer_from_host_3d
(vgdev, vfpriv->ctx_id, offset, args->level, args->stride,
args->layer_stride, &args->box, objs, fence);
dma_fence_put(&fence->f);
virtio_gpu_notify(vgdev);
return 0;
err_unlock:
virtio_gpu_array_unlock_resv(objs);
err_put_free:
virtio_gpu_array_put_free(objs);
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 virtio_gpu_object *bo;
struct virtio_gpu_object_array *objs;
struct virtio_gpu_fence *fence;
int ret;
u32 offset = args->offset;
objs = virtio_gpu_array_from_handles(file, &args->bo_handle, 1);
if (objs == NULL)
return -ENOENT;
bo = gem_to_virtio_gpu_obj(objs->objs[0]);
if (bo->guest_blob && !bo->host3d_blob) {
ret = -EINVAL;
goto err_put_free;
}
if (!vgdev->has_virgl_3d) {
virtio_gpu_cmd_transfer_to_host_2d
(vgdev, offset,
args->box.w, args->box.h, args->box.x, args->box.y,
objs, NULL);
} else {
virtio_gpu_create_context(dev, file);
if (!bo->host3d_blob && (args->stride || args->layer_stride)) {
ret = -EINVAL;
goto err_put_free;
}
ret = virtio_gpu_array_lock_resv(objs);
if (ret != 0)
goto err_put_free;
ret = -ENOMEM;
fence = virtio_gpu_fence_alloc(vgdev, vgdev->fence_drv.context,
0);
if (!fence)
goto err_unlock;
virtio_gpu_cmd_transfer_to_host_3d
(vgdev,
vfpriv ? vfpriv->ctx_id : 0, offset, args->level,
args->stride, args->layer_stride, &args->box, objs,
fence);
dma_fence_put(&fence->f);
}
virtio_gpu_notify(vgdev);
return 0;
err_unlock:
virtio_gpu_array_unlock_resv(objs);
err_put_free:
virtio_gpu_array_put_free(objs);
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 *obj;
long timeout = 15 * HZ;
int ret;
obj = drm_gem_object_lookup(file, args->handle);
if (obj == NULL)
return -ENOENT;
if (args->flags & VIRTGPU_WAIT_NOWAIT) {
ret = dma_resv_test_signaled(obj->resv, DMA_RESV_USAGE_READ);
} else {
ret = dma_resv_wait_timeout(obj->resv, DMA_RESV_USAGE_READ,
true, timeout);
}
if (ret == 0)
ret = -EBUSY;
else if (ret > 0)
ret = 0;
drm_gem_object_put(obj);
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 */
ret = virtio_gpu_cmd_get_capset(vgdev, found_valid, args->cap_set_ver,
&cache_ent);
if (ret)
return ret;
virtio_gpu_notify(vgdev);
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;
}
static int verify_blob(struct virtio_gpu_device *vgdev,
struct virtio_gpu_fpriv *vfpriv,
struct virtio_gpu_object_params *params,
struct drm_virtgpu_resource_create_blob *rc_blob,
bool *guest_blob, bool *host3d_blob)
{
if (!vgdev->has_resource_blob)
return -EINVAL;
if (rc_blob->blob_flags & ~VIRTGPU_BLOB_FLAG_USE_MASK)
return -EINVAL;
if (rc_blob->blob_flags & VIRTGPU_BLOB_FLAG_USE_CROSS_DEVICE) {
if (!vgdev->has_resource_assign_uuid)
return -EINVAL;
}
switch (rc_blob->blob_mem) {
case VIRTGPU_BLOB_MEM_GUEST:
*guest_blob = true;
break;
case VIRTGPU_BLOB_MEM_HOST3D_GUEST:
*guest_blob = true;
fallthrough;
case VIRTGPU_BLOB_MEM_HOST3D:
*host3d_blob = true;
break;
default:
return -EINVAL;
}
if (*host3d_blob) {
if (!vgdev->has_virgl_3d)
return -EINVAL;
/* Must be dword aligned. */
if (rc_blob->cmd_size % 4 != 0)
return -EINVAL;
params->ctx_id = vfpriv->ctx_id;
params->blob_id = rc_blob->blob_id;
} else {
if (rc_blob->blob_id != 0)
return -EINVAL;
if (rc_blob->cmd_size != 0)
return -EINVAL;
}
params->blob_mem = rc_blob->blob_mem;
params->size = rc_blob->size;
params->blob = true;
params->blob_flags = rc_blob->blob_flags;
return 0;
}
static int virtio_gpu_resource_create_blob_ioctl(struct drm_device *dev,
void *data,
struct drm_file *file)
{
int ret = 0;
uint32_t handle = 0;
bool guest_blob = false;
bool host3d_blob = false;
struct drm_gem_object *obj;
struct virtio_gpu_object *bo;
struct virtio_gpu_object_params params = { 0 };
struct virtio_gpu_device *vgdev = dev->dev_private;
struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
struct drm_virtgpu_resource_create_blob *rc_blob = data;
if (verify_blob(vgdev, vfpriv, ¶ms, rc_blob,
&guest_blob, &host3d_blob))
return -EINVAL;
if (vgdev->has_virgl_3d)
virtio_gpu_create_context(dev, file);
if (rc_blob->cmd_size) {
void *buf;
buf = memdup_user(u64_to_user_ptr(rc_blob->cmd),
rc_blob->cmd_size);
if (IS_ERR(buf))
return PTR_ERR(buf);
virtio_gpu_cmd_submit(vgdev, buf, rc_blob->cmd_size,
vfpriv->ctx_id, NULL, NULL);
}
if (guest_blob)
ret = virtio_gpu_object_create(vgdev, ¶ms, &bo, NULL);
else if (!guest_blob && host3d_blob)
ret = virtio_gpu_vram_create(vgdev, ¶ms, &bo);
else
return -EINVAL;
if (ret < 0)
return ret;
bo->guest_blob = guest_blob;
bo->host3d_blob = host3d_blob;
bo->blob_mem = rc_blob->blob_mem;
bo->blob_flags = rc_blob->blob_flags;
obj = &bo->base.base;
if (params.blob_flags & VIRTGPU_BLOB_FLAG_USE_CROSS_DEVICE) {
ret = virtio_gpu_resource_assign_uuid(vgdev, bo);
if (ret) {
drm_gem_object_release(obj);
return ret;
}
}
ret = drm_gem_handle_create(file, obj, &handle);
if (ret) {
drm_gem_object_release(obj);
return ret;
}
rc_blob->res_handle = bo->hw_res_handle;
rc_blob->bo_handle = handle;
/*
* The handle owns the reference now. But we must drop our
* remaining reference *after* we no longer need to dereference
* the obj. Otherwise userspace could guess the handle and
* race closing it from another thread.
*/
drm_gem_object_put(obj);
return 0;
}
static int virtio_gpu_context_init_ioctl(struct drm_device *dev,
void *data, struct drm_file *file)
{
int ret = 0;
uint32_t num_params, i;
uint64_t valid_ring_mask, param, value;
size_t len;
struct drm_virtgpu_context_set_param *ctx_set_params = NULL;
struct virtio_gpu_device *vgdev = dev->dev_private;
struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
struct drm_virtgpu_context_init *args = data;
num_params = args->num_params;
len = num_params * sizeof(struct drm_virtgpu_context_set_param);
if (!vgdev->has_context_init || !vgdev->has_virgl_3d)
return -EINVAL;
/* Number of unique parameters supported at this time. */
if (num_params > 4)
return -EINVAL;
ctx_set_params = memdup_user(u64_to_user_ptr(args->ctx_set_params),
len);
if (IS_ERR(ctx_set_params))
return PTR_ERR(ctx_set_params);
mutex_lock(&vfpriv->context_lock);
if (vfpriv->context_created) {
ret = -EEXIST;
goto out_unlock;
}
for (i = 0; i < num_params; i++) {
param = ctx_set_params[i].param;
value = ctx_set_params[i].value;
switch (param) {
case VIRTGPU_CONTEXT_PARAM_CAPSET_ID:
if (value > MAX_CAPSET_ID) {
ret = -EINVAL;
goto out_unlock;
}
if ((vgdev->capset_id_mask & (1ULL << value)) == 0) {
ret = -EINVAL;
goto out_unlock;
}
/* Context capset ID already set */
if (vfpriv->context_init &
VIRTIO_GPU_CONTEXT_INIT_CAPSET_ID_MASK) {
ret = -EINVAL;
goto out_unlock;
}
vfpriv->context_init |= value;
break;
case VIRTGPU_CONTEXT_PARAM_NUM_RINGS:
if (vfpriv->base_fence_ctx) {
ret = -EINVAL;
goto out_unlock;
}
if (value > MAX_RINGS) {
ret = -EINVAL;
goto out_unlock;
}
vfpriv->base_fence_ctx = dma_fence_context_alloc(value);
vfpriv->num_rings = value;
break;
case VIRTGPU_CONTEXT_PARAM_POLL_RINGS_MASK:
if (vfpriv->ring_idx_mask) {
ret = -EINVAL;
goto out_unlock;
}
vfpriv->ring_idx_mask = value;
break;
case VIRTGPU_CONTEXT_PARAM_DEBUG_NAME:
if (vfpriv->explicit_debug_name) {
ret = -EINVAL;
goto out_unlock;
}
ret = strncpy_from_user(vfpriv->debug_name,
u64_to_user_ptr(value),
DEBUG_NAME_MAX_LEN - 1);
if (ret < 0)
goto out_unlock;
vfpriv->explicit_debug_name = true;
ret = 0;
break;
default:
ret = -EINVAL;
goto out_unlock;
}
}
if (vfpriv->ring_idx_mask) {
valid_ring_mask = 0;
for (i = 0; i < vfpriv->num_rings; i++)
valid_ring_mask |= 1ULL << i;
if (~valid_ring_mask & vfpriv->ring_idx_mask) {
ret = -EINVAL;
goto out_unlock;
}
}
virtio_gpu_create_context_locked(vgdev, vfpriv);
virtio_gpu_notify(vgdev);
out_unlock:
mutex_unlock(&vfpriv->context_lock);
kfree(ctx_set_params);
return ret;
}
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),
DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_CREATE_BLOB,
virtio_gpu_resource_create_blob_ioctl,
DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VIRTGPU_CONTEXT_INIT, virtio_gpu_context_init_ioctl,
DRM_RENDER_ALLOW),
};
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