From: Chuck Lever <chuck.lever@oracle.com>
To: baolu.lu@linux.intel.com
Cc: isaacm@codeaurora.org, robin.murphy@arm.com,
iommu@lists.linux-foundation.org, will@kernel.org
Subject: [PATCH RFC 8/9] iommu/arm-smmu: Hook up map_sg()
Date: Wed, 27 Jan 2021 15:01:13 -0500 [thread overview]
Message-ID: <161177767345.1311.5047482538156874597.stgit@manet.1015granger.net> (raw)
In-Reply-To: <161177711359.1311.417185373365934204.stgit@manet.1015granger.net>
From: Isaac J. Manjarres <isaacm@codeaurora.org>
Now that everything is in place for iommu_map_sg() to defer
mapping a scatter-gather list to the io-pgtable layer, implement
the map_sg() callback in the SMMU driver, so that iommu_map_sg()
can invoke it with the entire scatter-gather list that will be
mapped.
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>
Tested-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
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..52acc6858512 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c
@@ -1208,6 +1208,24 @@ static int arm_smmu_map(struct iommu_domain *domain, unsigned long iova,
return ret;
}
+static int arm_smmu_map_sg(struct iommu_domain *domain, unsigned long iova,
+ struct scatterlist *sg, unsigned int nents, int prot,
+ gfp_t gfp, size_t *mapped)
+{
+ struct io_pgtable_ops *ops = to_smmu_domain(domain)->pgtbl_ops;
+ struct arm_smmu_device *smmu = to_smmu_domain(domain)->smmu;
+ int ret;
+
+ if (!ops)
+ return -ENODEV;
+
+ arm_smmu_rpm_get(smmu);
+ ret = ops->map_sg(ops, iova, sg, nents, prot, gfp, mapped);
+ arm_smmu_rpm_put(smmu);
+
+ return ret;
+}
+
static size_t arm_smmu_unmap(struct iommu_domain *domain, unsigned long iova,
size_t size, struct iommu_iotlb_gather *gather)
{
@@ -1624,6 +1642,7 @@ static struct iommu_ops arm_smmu_ops = {
.domain_free = arm_smmu_domain_free,
.attach_dev = arm_smmu_attach_dev,
.map = arm_smmu_map,
+ .map_sg = arm_smmu_map_sg,
.unmap = arm_smmu_unmap,
.flush_iotlb_all = arm_smmu_flush_iotlb_all,
.iotlb_sync = arm_smmu_iotlb_sync,
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next prev parent reply other threads:[~2021-01-27 20:01 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-27 20:00 [PATCH RFC 0/9] Possible set of VT-d optimizations Chuck Lever
2021-01-27 20:00 ` [PATCH RFC 1/9] iommu: Move iotlb_sync_map out from __iommu_map Chuck Lever
2021-01-28 2:40 ` Lu Baolu
2021-01-27 20:00 ` [PATCH RFC 2/9] iommu: Add iova and size as parameters in iotlb_sync_map Chuck Lever
2021-01-28 2:44 ` Lu Baolu
2021-01-28 12:51 ` Joerg Roedel
2021-01-28 13:19 ` Will Deacon
2021-01-28 13:26 ` Joerg Roedel
2021-01-27 20:00 ` [PATCH RFC 3/9] iommu/vt-d: Add iotlb_sync_map callback Chuck Lever
2021-01-27 20:00 ` [PATCH RFC 4/9] iommu/io-pgtable: Introduce map_sg() as a page table op Chuck Lever
2021-01-27 20:00 ` [PATCH RFC 5/9] iommu/io-pgtable-arm: Hook up map_sg() Chuck Lever
2021-01-28 13:53 ` Will Deacon
2021-01-27 20:01 ` [PATCH RFC 6/9] iommu/io-pgtable-arm-v7s: " Chuck Lever
2021-01-27 20:01 ` [PATCH RFC 7/9] iommu: Introduce map_sg() as an IOMMU op for IOMMU drivers Chuck Lever
2021-01-28 2:58 ` Lu Baolu
2021-01-27 20:01 ` Chuck Lever [this message]
2021-01-27 20:01 ` [PATCH RFC 9/9] iommu/vt-d: Introduce map_sg() for Intel IOMMUs Chuck Lever
2021-01-28 2:28 ` [PATCH RFC 0/9] Possible set of VT-d optimizations Lu Baolu
2021-01-28 13:59 ` Robin Murphy
2021-01-28 14:52 ` Chuck Lever
2021-01-29 11:54 ` Lu Baolu
2021-02-01 18:08 ` Chuck Lever
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