[PATCH v5 11/14] drm/panthor: Add the driver frontend block

[Boris Brezillon]

On Sun, 18 Feb 2024 22:41:25 +0100
Boris Brezillon <boris.brezillon at collabora.com> wrote:

> +static int panthor_ioctl_bo_create(struct drm_device *ddev, void *data,
> +				   struct drm_file *file)
> +{
> +	struct panthor_file *pfile = file->driver_priv;
> +	struct drm_panthor_bo_create *args = data;
> +	struct panthor_vm *vm = NULL;
> +	int cookie, ret;
> +
> +	if (!drm_dev_enter(ddev, &cookie))
> +		return -ENODEV;
> +
> +	if (!args->size || args->pad ||
> +	    (args->flags & ~PANTHOR_BO_FLAGS)) {
> +		ret = -EINVAL;
> +		goto out_dev_exit;
> +	}
> +
> +	if (args->exclusive_vm_id) {
> +		vm = panthor_vm_pool_get_vm(pfile->vms, args->exclusive_vm_id);
> +		if (!vm) {
> +			ret = -EINVAL;
> +			goto out_dev_exit;
> +		}
> +	}
> +
> +	ret = panthor_gem_create_with_handle(file, ddev, vm, args->size,
> +					     args->flags, &args->handle);

Despite what's stated in the uAPI doc, we never update args->size to
make it page-aligned. We need to change
panthor_gem_create_with_handle()'s prototype to take the size as an 'u64
*' so we can reflect the page-size alignment done by the BO allocation
logic.

Will send a v6 with this fix and the other 2 fixes for the bugs I
reported previously.