Re: [PATCH v5 3/7] iommu: Move global PASID allocation from SVA to core

[Baolu Lu]

On 4/28/23 1:49 AM, Jacob Pan wrote:
> +ioasid_t iommu_alloc_global_pasid_dev(struct device *dev)
> +{
> +	int ret;
> +	ioasid_t max;
> +
> +	max = dev_iommu_get_max_pasids(dev);

Perhaps you can use dev->iommu->max_pasids. It's static, so no need to
recalculate it.

> +	ret = ida_alloc_range(&iommu_global_pasid_ida, IOMMU_DEF_RID_PASID + 1, max, GFP_KERNEL);
> +	if (ret < 0)
> +		return IOMMU_PASID_INVALID;
> +
> +	return ret;
> +}
> +EXPORT_SYMBOL_GPL(iommu_alloc_global_pasid_dev);

Best regards,
baolu