/**
* vmw_simple_resource_init - Initialize a simple resource object.
*
* @dev_priv: Pointer to a struct device private.
* @simple: The struct vmw_simple_resource to initialize.
* @data: Data passed to the information initialization function.
* @res_free: Function pointer to destroy the simple resource.
*
* Returns:
* 0 if succeeded.
* Negative error value if error, in which case the resource will have been
* freed.
*/
static int vmw_simple_resource_init(struct vmw_private *dev_priv,
struct vmw_simple_resource *simple,
void *data,
void (*res_free)(struct vmw_resource *res))
{
struct vmw_resource *res = &simple->res;
int ret;
ret = vmw_resource_init(dev_priv, res, false, res_free,
&simple->func->res_func);
if (ret) {
res_free(res);
return ret;
}
ret = simple->func->init(res, data);
if (ret) {
vmw_resource_unreference(&res);
return ret;
}
simple->res.hw_destroy = simple->func->hw_destroy;
return 0;
}
/**
* vmw_simple_resource_base_release - TTM object release callback
*
* @p_base: The struct ttm_base_object member of the simple resource object.
*
* Called when the last reference to the embedded struct ttm_base_object is
* gone. Typically results in an object free, unless there are other
* references to the embedded struct vmw_resource.
*/
static void vmw_simple_resource_base_release(struct ttm_base_object **p_base)
{
struct ttm_base_object *base = *p_base;
struct vmw_user_simple_resource *usimple =
container_of(base, struct vmw_user_simple_resource, base);
struct vmw_resource *res = &usimple->simple.res;
*p_base = NULL;
vmw_resource_unreference(&res);
}
static void vmw_resource_to_validate_list(struct vmw_sw_context *sw_context,
struct vmw_resource **p_res)
{
struct vmw_resource *res = *p_res;
if (list_empty(&res->validate_head)) {
list_add_tail(&res->validate_head, &sw_context->resource_list);
*p_res = NULL;
} else
vmw_resource_unreference(p_res);
}
/**
* vmw_stdu_unpin_display - unpins the resource associated with display surface
*
* @stdu: contains the display surface
*
* If the display surface was privatedly allocated by
* vmw_surface_gb_priv_define() and not registered as a framebuffer, then it
* won't be automatically cleaned up when all the framebuffers are freed. As
* such, we have to explicitly call vmw_resource_unreference() to get it freed.
*/
static void vmw_stdu_unpin_display(struct vmw_screen_target_display_unit *stdu)
{
if (stdu->display_srf) {
struct vmw_resource *res = &stdu->display_srf->res;
vmw_resource_unpin(res);
if (stdu->content_fb_type != SAME_AS_DISPLAY) {
vmw_resource_unreference(&res);
stdu->content_fb_type = SAME_AS_DISPLAY;
}
stdu->display_srf = NULL;
}
}
int vmw_overlay_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
struct vmw_private *dev_priv = vmw_priv(dev);
struct vmw_overlay *overlay = dev_priv->overlay_priv;
struct drm_vmw_control_stream_arg *arg =
(struct drm_vmw_control_stream_arg *)data;
struct vmw_dma_buffer *buf;
struct vmw_resource *res;
int ret;
if (!vmw_overlay_available(dev_priv))
return -ENOSYS;
ret = vmw_user_stream_lookup(dev_priv, tfile, &arg->stream_id, &res);
if (ret)
return ret;
mutex_lock(&overlay->mutex);
if (!arg->enabled) {
ret = vmw_overlay_stop(dev_priv, arg->stream_id, false, true);
goto out_unlock;
}
ret = vmw_user_dmabuf_lookup(tfile, arg->handle, &buf, NULL);
if (ret)
goto out_unlock;
ret = vmw_overlay_update_stream(dev_priv, buf, arg, true);
vmw_dmabuf_unreference(&buf);
out_unlock:
mutex_unlock(&overlay->mutex);
vmw_resource_unreference(&res);
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;
}