From: "Isaac J. Manjarres" <isaacm@codeaurora.org>
To: iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org
Cc: "Isaac J. Manjarres" <isaacm@codeaurora.org>,
will@kernel.org, robin.murphy@arm.com, pratikp@codeaurora.org
Subject: [RFC PATCH 5/5] iommu/arm-smmu: Implement the unmap_pages IOMMU driver callback
Date: Tue, 30 Mar 2021 20:00:42 -0700 [thread overview]
Message-ID: <20210331030042.13348-6-isaacm@codeaurora.org> (raw)
In-Reply-To: <20210331030042.13348-1-isaacm@codeaurora.org>
Implement the unmap_pages IOMMU driver callback for the ARM
SMMU driver.
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>
Suggested-by: Will Deacon <will@kernel.org>
---
drivers/iommu/arm/arm-smmu/arm-smmu.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c
index d8c6bfde6a61..a65ff92cb6e3 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c
@@ -1225,6 +1225,24 @@ static size_t arm_smmu_unmap(struct iommu_domain *domain, unsigned long iova,
return ret;
}
+static size_t arm_smmu_unmap_pages(struct iommu_domain *domain, unsigned long iova,
+ size_t pgsize, size_t pgcount,
+ struct iommu_iotlb_gather *gather)
+{
+ struct io_pgtable_ops *ops = to_smmu_domain(domain)->pgtbl_ops;
+ struct arm_smmu_device *smmu = to_smmu_domain(domain)->smmu;
+ size_t ret;
+
+ if (!ops)
+ return 0;
+
+ arm_smmu_rpm_get(smmu);
+ ret = ops->unmap_pages(ops, iova, pgsize, pgcount, gather);
+ arm_smmu_rpm_put(smmu);
+
+ return ret;
+}
+
static void arm_smmu_flush_iotlb_all(struct iommu_domain *domain)
{
struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
@@ -1625,6 +1643,7 @@ static struct iommu_ops arm_smmu_ops = {
.attach_dev = arm_smmu_attach_dev,
.map = arm_smmu_map,
.unmap = arm_smmu_unmap,
+ .unmap_pages = arm_smmu_unmap_pages,
.flush_iotlb_all = arm_smmu_flush_iotlb_all,
.iotlb_sync = arm_smmu_iotlb_sync,
.iova_to_phys = arm_smmu_iova_to_phys,
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
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next prev parent reply other threads:[~2021-03-31 3:01 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-31 3:00 [RFC PATCH 0/5] Optimization for unmapping iommu mapped buffers Isaac J. Manjarres
2021-03-31 3:00 ` [RFC PATCH 1/5] iommu/io-pgtable: Introduce unmap_pages() as a page table op Isaac J. Manjarres
2021-03-31 3:00 ` [RFC PATCH 2/5] iommu: Add an unmap_pages() op for IOMMU drivers Isaac J. Manjarres
2021-03-31 4:47 ` Lu Baolu
2021-03-31 5:36 ` isaacm
2021-03-31 5:39 ` Lu Baolu
2021-04-02 17:25 ` isaacm
2021-04-03 1:35 ` Lu Baolu
2021-03-31 3:00 ` [RFC PATCH 3/5] iommu: Add support for the unmap_pages IOMMU callback Isaac J. Manjarres
2021-04-01 15:34 ` Robin Murphy
2021-04-01 16:37 ` Will Deacon
2021-03-31 3:00 ` [RFC PATCH 4/5] iommu/io-pgtable-arm: Implement arm_lpae_unmap_pages() Isaac J. Manjarres
2021-04-01 17:19 ` Robin Murphy
2021-03-31 3:00 ` Isaac J. Manjarres [this message]
2021-04-01 3:28 ` [RFC PATCH 0/5] Optimization for unmapping iommu mapped buffers chenxiang (M)
2021-04-01 15:33 ` Robin Murphy
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