From: Jacob Pan <jacob.jun.pan@linux.intel.com>
To: iommu@lists.linux-foundation.org,
LKML <linux-kernel@vger.kernel.org>,
dmaengine@vger.kernel.org, Joerg Roedel <joro@8bytes.org>,
David Woodhouse <dwmw2@infradead.org>,
Jean-Philippe Brucker <jean-philippe@linaro.com>,
"Lu Baolu" <baolu.lu@linux.intel.com>,
Jason Gunthorpe <jgg@nvidia.com>,
"Christoph Hellwig" <hch@infradead.org>,
vkoul@kernel.org, robin.murphy@arm.com, will@kernel.org
Cc: "Tian, Kevin" <kevin.tian@intel.com>,
Dave Jiang <dave.jiang@intel.com>,
Raj Ashok <ashok.raj@intel.com>
Subject: [PATCH v4 1/6] iommu: Add a per domain PASID for DMA API
Date: Wed, 18 May 2022 11:21:15 -0700 [thread overview]
Message-ID: <20220518182120.1136715-2-jacob.jun.pan@linux.intel.com> (raw)
In-Reply-To: <20220518182120.1136715-1-jacob.jun.pan@linux.intel.com>
DMA requests tagged with PASID can target individual IOMMU domains.
Introduce a domain-wide PASID for DMA API, it will be used on the same
mapping as legacy DMA without PASID. Let it be IOVA or PA in case of
identity domain.
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
---
include/linux/iommu.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 9405034e3013..36ad007084cc 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -106,6 +106,8 @@ struct iommu_domain {
enum iommu_page_response_code (*iopf_handler)(struct iommu_fault *fault,
void *data);
void *fault_data;
+ ioasid_t dma_pasid; /* Used for DMA requests with PASID */
+ atomic_t dma_pasid_users;
};
static inline bool iommu_is_dma_domain(struct iommu_domain *domain)
--
2.25.1
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next prev parent reply other threads:[~2022-05-18 18:17 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-18 18:21 [PATCH v4 0/6] Enable PASID for DMA API users Jacob Pan
2022-05-18 18:21 ` Jacob Pan [this message]
2022-05-19 6:50 ` [PATCH v4 1/6] iommu: Add a per domain PASID for DMA API Baolu Lu
2022-05-24 13:50 ` Jason Gunthorpe via iommu
2022-05-24 15:17 ` Jacob Pan
2022-05-30 12:22 ` Jason Gunthorpe via iommu
2022-05-31 10:12 ` Tian, Kevin
2022-05-31 12:45 ` Baolu Lu
2022-05-31 16:03 ` Jason Gunthorpe via iommu
2022-05-31 17:29 ` Jacob Pan
2022-05-31 19:05 ` Jason Gunthorpe via iommu
2022-05-31 20:44 ` Jacob Pan
2022-06-01 1:50 ` Tian, Kevin
2022-06-01 1:43 ` Tian, Kevin
2022-06-01 9:37 ` Baolu Lu
2022-06-01 10:05 ` Tian, Kevin
2022-05-18 18:21 ` [PATCH v4 2/6] iommu: Add a helper to do PASID lookup from domain Jacob Pan
2022-05-19 6:41 ` Baolu Lu
2022-05-19 20:10 ` Jacob Pan
2022-05-19 6:48 ` Christoph Hellwig
2022-05-20 15:18 ` Jacob Pan
2022-05-23 7:55 ` Tian, Kevin
2022-05-23 9:14 ` Tian, Kevin
2022-05-23 18:01 ` Jacob Pan
2022-05-18 18:21 ` [PATCH v4 3/6] iommu/vt-d: Implement domain ops for attach_dev_pasid Jacob Pan
2022-05-24 13:51 ` Jason Gunthorpe via iommu
2022-05-24 16:12 ` Jacob Pan
2022-05-24 18:02 ` Jason Gunthorpe via iommu
2022-05-24 20:45 ` Jacob Pan
2022-05-24 21:10 ` Jason Gunthorpe via iommu
2022-05-18 18:21 ` [PATCH v4 4/6] iommu: Add PASID support for DMA mapping API users Jacob Pan
2022-05-23 8:25 ` Tian, Kevin
2022-05-23 15:23 ` Jacob Pan
2022-05-18 18:21 ` [PATCH v4 5/6] dmaengine: idxd: Use DMA API for in-kernel DMA with PASID Jacob Pan
2022-05-18 18:21 ` [PATCH v4 6/6] iommu/vt-d: Delete unused SVM flag Jacob Pan
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