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Manjarres" To: iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 11/12] iommu/arm-smmu: Implement the unmap_pages() IOMMU driver callback Date: Thu, 1 Apr 2021 18:34:50 -0700 Message-Id: <20210402013452.4013-12-isaacm@codeaurora.org> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20210402013452.4013-1-isaacm@codeaurora.org> References: <20210402013452.4013-1-isaacm@codeaurora.org> MIME-Version: 1.0 Cc: "Isaac J. Manjarres" , robin.murphy@arm.com, will@kernel.org, pratikp@codeaurora.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Implement the unmap_pages() callback for the ARM SMMU driver to allow calls from iommu_unmap to unmap multiple pages of the same size in one call. Signed-off-by: Isaac J. Manjarres Suggested-by: Will Deacon --- 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..f29f1fb109f8 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 *iotlb_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, iotlb_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 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu