From: Baolu Lu <baolu.lu@linux.intel.com>
To: Jacob Pan <jacob.jun.pan@linux.intel.com>,
LKML <linux-kernel@vger.kernel.org>,
iommu@lists.linux.dev, Robin Murphy <robin.murphy@arm.com>,
Jason Gunthorpe <jgg@nvidia.com>, Joerg Roedel <joro@8bytes.org>,
dmaengine@vger.kernel.org, vkoul@kernel.org
Cc: baolu.lu@linux.intel.com, Will Deacon <will@kernel.org>,
David Woodhouse <dwmw2@infradead.org>,
Raj Ashok <ashok.raj@intel.com>,
"Tian, Kevin" <kevin.tian@intel.com>, Yi Liu <yi.l.liu@intel.com>,
"Yu, Fenghua" <fenghua.yu@intel.com>,
Dave Jiang <dave.jiang@intel.com>,
Tony Luck <tony.luck@intel.com>,
"Zanussi, Tom" <tom.zanussi@intel.com>,
narayan.ranganathan@intel.com
Subject: Re: [PATCH v5 3/7] iommu: Move global PASID allocation from SVA to core
Date: Wed, 3 May 2023 14:32:15 +0800 [thread overview]
Message-ID: <db3be8a2-6520-9652-6bee-dbceb320cfc2@linux.intel.com> (raw)
In-Reply-To: <20230427174937.471668-4-jacob.jun.pan@linux.intel.com>
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
next prev parent reply other threads:[~2023-05-03 6:32 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-27 17:49 [PATCH v5 0/7] Re-enable IDXD kernel workqueue under DMA API Jacob Pan
2023-04-27 17:49 ` [PATCH v5 1/7] iommu: Generalize default PCIe requester ID PASID Jacob Pan
2023-04-28 9:38 ` Tian, Kevin
2023-04-28 15:56 ` Jacob Pan
2023-05-05 8:28 ` Tian, Kevin
2023-05-09 20:39 ` Jacob Pan
2023-04-27 17:49 ` [PATCH v5 2/7] iommu/sva: Explicitly exclude RID_PASID from SVA Jacob Pan
2023-04-28 9:40 ` Tian, Kevin
2023-04-28 15:56 ` Jacob Pan
2023-04-27 17:49 ` [PATCH v5 3/7] iommu: Move global PASID allocation from SVA to core Jacob Pan
2023-04-28 9:46 ` Tian, Kevin
2023-04-28 16:40 ` Jacob Pan
2023-05-03 6:32 ` Baolu Lu [this message]
2023-05-04 21:26 ` Jacob Pan
2023-04-27 17:49 ` [PATCH v5 4/7] iommu/vt-d: Factoring out PASID set up helper function Jacob Pan
2023-04-28 9:47 ` Tian, Kevin
2023-05-03 6:37 ` Baolu Lu
2023-05-04 21:39 ` Jacob Pan
2023-05-04 21:27 ` Jacob Pan
2023-04-27 17:49 ` [PATCH v5 5/7] iommu/vt-d: Prepare PASID attachment beyond RID_PASID Jacob Pan
2023-05-03 6:49 ` Baolu Lu
2023-05-04 21:53 ` Jacob Pan
2023-04-27 17:49 ` [PATCH v5 6/7] iommu/vt-d: Implement set_dev_pasid domain op Jacob Pan
2023-05-03 7:26 ` Baolu Lu
2023-05-04 23:03 ` Jacob Pan
2023-05-05 2:58 ` Baolu Lu
2023-05-05 20:32 ` Jacob Pan
2023-04-27 17:49 ` [PATCH v5 7/7] dmaengine/idxd: Re-enable kernel workqueue under DMA API Jacob Pan
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