int ttm_pl_reference_ioctl(struct ttm_object_file *tfile, void *data)
{
union ttm_pl_reference_arg *arg = data;
struct ttm_pl_rep *rep = &arg->rep;
struct ttm_bo_user_object *user_bo;
struct ttm_buffer_object *bo;
struct ttm_base_object *base;
int ret;
user_bo = ttm_bo_user_lookup(tfile, arg->req.handle);
if (unlikely(user_bo == NULL)) {
printk(KERN_ERR "Could not reference buffer object.\n");
return -EINVAL;
}
bo = &user_bo->bo;
ret = ttm_ref_object_add(tfile, &user_bo->base, TTM_REF_USAGE, NULL);
if (unlikely(ret != 0)) {
printk(KERN_ERR
"Could not add a reference to buffer object.\n");
goto out;
}
ret = ttm_bo_reserve(bo, true, false, false, 0);
if (unlikely(ret != 0))
goto out;
ttm_pl_fill_rep(bo, rep);
ttm_bo_unreserve(bo);
out:
base = &user_bo->base;
ttm_base_object_unref(&base);
return ret;
}
int ttm_pl_synccpu_ioctl(struct ttm_object_file *tfile, void *data)
{
struct ttm_pl_synccpu_arg *arg = data;
struct ttm_bo_user_object *user_bo;
struct ttm_buffer_object *bo;
struct ttm_base_object *base;
bool existed;
int ret;
switch (arg->op) {
case TTM_PL_SYNCCPU_OP_GRAB:
user_bo = ttm_bo_user_lookup(tfile, arg->handle);
if (unlikely(user_bo == NULL)) {
printk(KERN_ERR
"Could not find buffer object for synccpu.\n");
return -EINVAL;
}
bo = &user_bo->bo;
base = &user_bo->base;
ret = ttm_bo_synccpu_write_grab(bo,
arg->access_mode &
TTM_PL_SYNCCPU_MODE_NO_BLOCK);
if (unlikely(ret != 0)) {
ttm_base_object_unref(&base);
goto out;
}
ret = ttm_ref_object_add(tfile, &user_bo->base,
TTM_REF_SYNCCPU_WRITE, &existed);
if (existed || ret != 0)
ttm_bo_synccpu_write_release(bo);
ttm_base_object_unref(&base);
break;
case TTM_PL_SYNCCPU_OP_RELEASE:
ret = ttm_ref_object_base_unref(tfile, arg->handle,
TTM_REF_SYNCCPU_WRITE);
break;
default:
ret = -EINVAL;
break;
}
out:
return ret;
}
struct ttm_buffer_object *ttm_buffer_object_lookup(struct ttm_object_file
*tfile, uint32_t handle) {
struct ttm_bo_user_object *user_bo;
struct ttm_base_object *base;
user_bo = ttm_bo_user_lookup(tfile, handle);
if (unlikely(user_bo == NULL))
return NULL;
(void)ttm_bo_reference(&user_bo->bo);
base = &user_bo->base;
ttm_base_object_unref(&base);
return &user_bo->bo;
}
static struct ttm_bo_user_object *ttm_bo_user_lookup(struct ttm_object_file
*tfile, uint32_t handle) {
struct ttm_base_object *base;
base = ttm_base_object_lookup(tfile, handle);
if (unlikely(base == NULL)) {
printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n",
(unsigned long)handle);
return NULL;
}
if (unlikely(base->object_type != ttm_buffer_type)) {
ttm_base_object_unref(&base);
printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n",
(unsigned long)handle);
return NULL;
}
return container_of(base, struct ttm_bo_user_object, base);
}
int ttm_base_object_init(struct ttm_object_file *tfile,
struct ttm_base_object *base,
bool shareable,
enum ttm_object_type object_type,
void (*rcount_release) (struct ttm_base_object **),
void (*ref_obj_release) (struct ttm_base_object *,
enum ttm_ref_type ref_type))
{
struct ttm_object_device *tdev = tfile->tdev;
int ret;
base->shareable = shareable;
base->tfile = ttm_object_file_ref(tfile);
base->refcount_release = rcount_release;
base->ref_obj_release = ref_obj_release;
base->object_type = object_type;
refcount_init(&base->refcount, 1);
rw_init(&tdev->object_lock, "ttmbao");
rw_wlock(&tdev->object_lock);
ret = drm_ht_just_insert_please(&tdev->object_hash,
&base->hash,
(unsigned long)base, 31, 0, 0);
rw_wunlock(&tdev->object_lock);
if (unlikely(ret != 0))
goto out_err0;
ret = ttm_ref_object_add(tfile, base, TTM_REF_USAGE, NULL);
if (unlikely(ret != 0))
goto out_err1;
ttm_base_object_unref(&base);
return 0;
out_err1:
rw_wlock(&tdev->object_lock);
(void)drm_ht_remove_item(&tdev->object_hash, &base->hash);
rw_wunlock(&tdev->object_lock);
out_err0:
return ret;
}
/**
* vmw_simple_resource_create_ioctl - Helper to set up an ioctl function to
* create a struct vmw_simple_resource.
*
* @dev: Pointer to a struct drm device.
* @data: Ioctl argument.
* @file_priv: Pointer to a struct drm_file identifying the caller.
* @func: Pointer to a struct vmw_simple_resource_func identifying the
* simple resource type.
*
* Returns:
* 0 if success,
* Negative error value on error.
*/
int
vmw_simple_resource_create_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv,
const struct vmw_simple_resource_func *func)
{
struct vmw_private *dev_priv = vmw_priv(dev);
struct vmw_user_simple_resource *usimple;
struct vmw_resource *res;
struct vmw_resource *tmp;
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
struct ttm_operation_ctx ctx = {
.interruptible = true,
.no_wait_gpu = false
};
size_t alloc_size;
size_t account_size;
int ret;
alloc_size = offsetof(struct vmw_user_simple_resource, simple) +
func->size;
account_size = ttm_round_pot(alloc_size) + VMW_IDA_ACC_SIZE +
TTM_OBJ_EXTRA_SIZE;
ret = ttm_read_lock(&dev_priv->reservation_sem, true);
if (ret)
return ret;
ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv), account_size,
&ctx);
ttm_read_unlock(&dev_priv->reservation_sem);
if (ret) {
if (ret != -ERESTARTSYS)
DRM_ERROR("Out of graphics memory for %s"
" creation.\n", func->res_func.type_name);
goto out_ret;
}
usimple = kzalloc(alloc_size, GFP_KERNEL);
if (!usimple) {
ttm_mem_global_free(vmw_mem_glob(dev_priv),
account_size);
ret = -ENOMEM;
goto out_ret;
}
usimple->simple.func = func;
usimple->account_size = account_size;
res = &usimple->simple.res;
usimple->base.shareable = false;
usimple->base.tfile = NULL;
/*
* From here on, the destructor takes over resource freeing.
*/
ret = vmw_simple_resource_init(dev_priv, &usimple->simple,
data, vmw_simple_resource_free);
if (ret)
goto out_ret;
tmp = vmw_resource_reference(res);
ret = ttm_base_object_init(tfile, &usimple->base, false,
func->ttm_res_type,
&vmw_simple_resource_base_release, NULL);
if (ret) {
vmw_resource_unreference(&tmp);
goto out_err;
}
func->set_arg_handle(data, usimple->base.handle);
out_err:
vmw_resource_unreference(&res);
out_ret:
return ret;
}
/**
* vmw_simple_resource_lookup - Look up a simple resource from its user-space
* handle.
*
* @tfile: struct ttm_object_file identifying the caller.
* @handle: The user-space handle.
* @func: The struct vmw_simple_resource_func identifying the simple resource
* type.
*
* Returns: Refcounted pointer to the embedded struct vmw_resource if
* successfule. Error pointer otherwise.
*/
struct vmw_resource *
vmw_simple_resource_lookup(struct ttm_object_file *tfile,
uint32_t handle,
const struct vmw_simple_resource_func *func)
{
struct vmw_user_simple_resource *usimple;
struct ttm_base_object *base;
struct vmw_resource *res;
base = ttm_base_object_lookup(tfile, handle);
if (!base) {
DRM_ERROR("Invalid %s handle 0x%08lx.\n",
func->res_func.type_name,
(unsigned long) handle);
return ERR_PTR(-ESRCH);
}
if (ttm_base_object_type(base) != func->ttm_res_type) {
ttm_base_object_unref(&base);
DRM_ERROR("Invalid type of %s handle 0x%08lx.\n",
func->res_func.type_name,
(unsigned long) handle);
return ERR_PTR(-EINVAL);
}
usimple = container_of(base, typeof(*usimple), base);
res = vmw_resource_reference(&usimple->simple.res);
ttm_base_object_unref(&base);
return res;
}
