From: Georgi Djakov <quic_c_gdjako@quicinc.com>
To: <will@kernel.org>, <robin.murphy@arm.com>
Cc: <joro@8bytes.org>, <isaacm@codeaurora.org>,
<baolu.lu@linux.intel.com>, <pratikp@codeaurora.org>,
<iommu@lists.linux-foundation.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <djakov@kernel.org>
Subject: [PATCH v6 02/15] iommu: Add an unmap_pages() op for IOMMU drivers
Date: Tue, 15 Jun 2021 10:08:20 -0700 [thread overview]
Message-ID: <1623776913-390160-3-git-send-email-quic_c_gdjako@quicinc.com> (raw)
In-Reply-To: <1623776913-390160-1-git-send-email-quic_c_gdjako@quicinc.com>
From: "Isaac J. Manjarres" <isaacm@codeaurora.org>
Add a callback for IOMMU drivers to provide a path for the
IOMMU framework to call into an IOMMU driver, which can call
into the io-pgtable code, to unmap a virtually contiguous
range of pages of the same size.
For IOMMU drivers that do not specify an unmap_pages() callback,
the existing logic of unmapping memory one page block at a time
will be used.
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>
Suggested-by: Will Deacon <will@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Georgi Djakov <quic_c_gdjako@quicinc.com>
---
include/linux/iommu.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 32d448050bf7..25a844121be5 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -181,6 +181,7 @@ struct iommu_iotlb_gather {
* @detach_dev: detach device from an iommu domain
* @map: map a physically contiguous memory region to an iommu domain
* @unmap: unmap a physically contiguous memory region from an iommu domain
+ * @unmap_pages: unmap a number of pages of the same size from an iommu domain
* @flush_iotlb_all: Synchronously flush all hardware TLBs for this domain
* @iotlb_sync_map: Sync mappings created recently using @map to the hardware
* @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush
@@ -231,6 +232,9 @@ struct iommu_ops {
phys_addr_t paddr, size_t size, int prot, gfp_t gfp);
size_t (*unmap)(struct iommu_domain *domain, unsigned long iova,
size_t size, struct iommu_iotlb_gather *iotlb_gather);
+ size_t (*unmap_pages)(struct iommu_domain *domain, unsigned long iova,
+ size_t pgsize, size_t pgcount,
+ struct iommu_iotlb_gather *iotlb_gather);
void (*flush_iotlb_all)(struct iommu_domain *domain);
void (*iotlb_sync_map)(struct iommu_domain *domain, unsigned long iova,
size_t size);
next prev parent reply other threads:[~2021-06-15 17:08 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-15 17:08 [PATCH v6 00/15] Optimizing iommu_[map/unmap] performance Georgi Djakov
2021-06-15 17:08 ` [PATCH v6 01/15] iommu/io-pgtable: Introduce unmap_pages() as a page table op Georgi Djakov
2021-06-15 17:08 ` Georgi Djakov [this message]
2021-06-15 17:08 ` [PATCH v6 03/15] iommu/io-pgtable: Introduce map_pages() " Georgi Djakov
2021-06-15 17:08 ` [PATCH v6 04/15] iommu: Add a map_pages() op for IOMMU drivers Georgi Djakov
2021-06-15 17:08 ` [PATCH v6 05/15] iommu: Use bitmap to calculate page size in iommu_pgsize() Georgi Djakov
2021-06-15 17:08 ` [PATCH v6 06/15] iommu: Split 'addr_merge' argument to iommu_pgsize() into separate parts Georgi Djakov
2021-06-15 17:08 ` [PATCH v6 07/15] iommu: Hook up '->unmap_pages' driver callback Georgi Djakov
2021-06-15 17:08 ` [PATCH v6 08/15] iommu: Add support for the map_pages() callback Georgi Djakov
2021-06-15 17:08 ` [PATCH v6 09/15] iommu/io-pgtable-arm: Prepare PTE methods for handling multiple entries Georgi Djakov
2021-06-15 17:08 ` [PATCH v6 10/15] iommu/io-pgtable-arm: Implement arm_lpae_unmap_pages() Georgi Djakov
2021-06-15 17:08 ` [PATCH v6 11/15] iommu/io-pgtable-arm: Implement arm_lpae_map_pages() Georgi Djakov
2021-06-15 17:08 ` [PATCH v6 12/15] iommu/io-pgtable-arm-v7s: Implement arm_v7s_unmap_pages() Georgi Djakov
2021-06-15 17:08 ` [PATCH v6 13/15] iommu/io-pgtable-arm-v7s: Implement arm_v7s_map_pages() Georgi Djakov
2021-06-15 17:08 ` [PATCH v6 14/15] iommu/arm-smmu: Implement the unmap_pages() IOMMU driver callback Georgi Djakov
2021-06-15 17:08 ` [PATCH v6 15/15] iommu/arm-smmu: Implement the map_pages() " Georgi Djakov
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