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Manjarres" To: will@kernel.org, robin.murphy@arm.com, joro@8bytes.org Cc: "Isaac J. Manjarres" , pdaly@codeaurora.org, pratikp@codeaurora.org, linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: [PATCH 5/5] iommu/arm-smmu: Hook up map_sg() Date: Fri, 8 Jan 2021 17:50:31 -0800 Message-Id: <1610157031-26301-6-git-send-email-isaacm@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1610157031-26301-1-git-send-email-isaacm@codeaurora.org> References: <1610157031-26301-1-git-send-email-isaacm@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.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 --- 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 d8c6bfd..52acc68 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, -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project