linux-kernel - [PATCH 1/5] iommu/arm-smmu: Pass io_pgtable_cfg to impl specific init

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Message-Id: <1576761286-20451-2-git-send-email-smasetty@codeaurora.org>
Date:   Thu, 19 Dec 2019 18:44:42 +0530
From:   Sharat Masetty <smasetty@...eaurora.org>
To:     freedreno@...ts.freedesktop.org
Cc:     dri-devel@...edesktop.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, will@...nel.org,
        robin.murphy@....com, joro@...tes.org,
        iommu@...ts.linux-foundation.org, jcrouse@...eaurora.org,
        saiprakash.ranjan@...eaurora.org
Subject: [PATCH 1/5] iommu/arm-smmu: Pass io_pgtable_cfg to impl specific init_context

From: Jordan Crouse <jcrouse@...eaurora.org>

Pass the propposed io_pgtable_cfg to the implementation specific
init_context() function to give the implementation an opportunity to
to modify it before it gets passed to io-pgtable.

Signed-off-by: Jordan Crouse <jcrouse@...eaurora.org>
Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
---
 drivers/iommu/arm-smmu-impl.c |  3 ++-
 drivers/iommu/arm-smmu.c      | 11 ++++++-----
 drivers/iommu/arm-smmu.h      |  3 ++-
 3 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/iommu/arm-smmu-impl.c b/drivers/iommu/arm-smmu-impl.c
index b2fe72a..33ed682 100644
--- a/drivers/iommu/arm-smmu-impl.c
+++ b/drivers/iommu/arm-smmu-impl.c
@@ -68,7 +68,8 @@ static int cavium_cfg_probe(struct arm_smmu_device *smmu)
 	return 0;
 }

-static int cavium_init_context(struct arm_smmu_domain *smmu_domain)
+static int cavium_init_context(struct arm_smmu_domain *smmu_domain,
+		struct io_pgtable_cfg *pgtbl_cfg)
 {
 	struct cavium_smmu *cs = container_of(smmu_domain->smmu,
 					      struct cavium_smmu, smmu);
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index eee48f9..4f7e0c0 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -758,11 +758,6 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
 		cfg->asid = cfg->cbndx;

 	smmu_domain->smmu = smmu;
-	if (smmu->impl && smmu->impl->init_context) {
-		ret = smmu->impl->init_context(smmu_domain);
-		if (ret)
-			goto out_unlock;
-	}

 	smmu_domain->pgtbl_cfg = (struct io_pgtable_cfg) {
 		.pgsize_bitmap	= smmu->pgsize_bitmap,
@@ -773,6 +768,12 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
 		.iommu_dev	= smmu->dev,
 	};

+	if (smmu->impl && smmu->impl->init_context) {
+		ret = smmu->impl->init_context(smmu_domain, &smmu_domain->pgtbl_cfg);
+		if (ret)
+			goto out_unlock;
+	}
+
 	if (smmu_domain->non_strict)
 		smmu_domain->pgtbl_cfg.quirks |= IO_PGTABLE_QUIRK_NON_STRICT;

diff --git a/drivers/iommu/arm-smmu.h b/drivers/iommu/arm-smmu.h
index b2df38c..f57cdbe 100644
--- a/drivers/iommu/arm-smmu.h
+++ b/drivers/iommu/arm-smmu.h
@@ -335,7 +335,8 @@ struct arm_smmu_impl {
 			    u64 val);
 	int (*cfg_probe)(struct arm_smmu_device *smmu);
 	int (*reset)(struct arm_smmu_device *smmu);
-	int (*init_context)(struct arm_smmu_domain *smmu_domain);
+	int (*init_context)(struct arm_smmu_domain *smmu_domain,
+			    struct io_pgtable_cfg *pgtbl_cfg);
 };

 static inline void __iomem *arm_smmu_page(struct arm_smmu_device *smmu, int n)
--
1.9.1