[PATCH v7 01/14] iommu/arm-smmu-v3: Convert to domain_alloc_sva()

From: Jason Gunthorpe <jgg@nvidia.com>
To: iommu@lists.linux.dev, Joerg Roedel <joro@8bytes.org>,
	linux-arm-kernel@lists.infradead.org,
	Robin Murphy <robin.murphy@arm.com>,
	Will Deacon <will@kernel.org>
Cc: Eric Auger <eric.auger@redhat.com>,
	Jean-Philippe Brucker <jean-philippe@linaro.org>,
	Moritz Fischer <mdf@kernel.org>,
	Michael Shavit <mshavit@google.com>,
	Nicolin Chen <nicolinc@nvidia.com>,
	patches@lists.linux.dev,
	Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>
Subject: [PATCH v7 01/14] iommu/arm-smmu-v3: Convert to domain_alloc_sva()
Date: Wed,  8 May 2024 15:57:09 -0300	[thread overview]
Message-ID: <1-v7-9597c885796c+d2-smmuv3_newapi_p2b_jgg@nvidia.com> (raw)
In-Reply-To: <0-v7-9597c885796c+d2-smmuv3_newapi_p2b_jgg@nvidia.com>

This allows the driver the receive the mm and a always a device during
allocation. Later patches need this to properly setup the notifier when
the domain is first allocated.

Remove ops->domain_alloc() as SVA was the only remaining purpose.

Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Tested-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Michael Shavit <mshavit@google.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c |  6 ++++--
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c     | 10 +---------
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h     |  6 +++++-
 3 files changed, 10 insertions(+), 12 deletions(-)

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
index e490ffb3801545..28f8bf4327f69a 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
@@ -656,13 +656,15 @@ static const struct iommu_domain_ops arm_smmu_sva_domain_ops = {
 	.free			= arm_smmu_sva_domain_free
 };
 
-struct iommu_domain *arm_smmu_sva_domain_alloc(void)
+struct iommu_domain *arm_smmu_sva_domain_alloc(struct device *dev,
+					       struct mm_struct *mm)
 {
 	struct iommu_domain *domain;
 
 	domain = kzalloc(sizeof(*domain), GFP_KERNEL);
 	if (!domain)
-		return NULL;
+		return ERR_PTR(-ENOMEM);
+	domain->type = IOMMU_DOMAIN_SVA;
 	domain->ops = &arm_smmu_sva_domain_ops;
 
 	return domain;
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index ab415e107054c1..bd79422f7b6f50 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -2237,14 +2237,6 @@ static bool arm_smmu_capable(struct device *dev, enum iommu_cap cap)
 	}
 }
 
-static struct iommu_domain *arm_smmu_domain_alloc(unsigned type)
-{
-
-	if (type == IOMMU_DOMAIN_SVA)
-		return arm_smmu_sva_domain_alloc();
-	return ERR_PTR(-EOPNOTSUPP);
-}
-
 static struct iommu_domain *arm_smmu_domain_alloc_paging(struct device *dev)
 {
 	struct arm_smmu_domain *smmu_domain;
@@ -3097,8 +3089,8 @@ static struct iommu_ops arm_smmu_ops = {
 	.identity_domain	= &arm_smmu_identity_domain,
 	.blocked_domain		= &arm_smmu_blocked_domain,
 	.capable		= arm_smmu_capable,
-	.domain_alloc		= arm_smmu_domain_alloc,
 	.domain_alloc_paging    = arm_smmu_domain_alloc_paging,
+	.domain_alloc_sva       = arm_smmu_sva_domain_alloc,
 	.probe_device		= arm_smmu_probe_device,
 	.release_device		= arm_smmu_release_device,
 	.device_group		= arm_smmu_device_group,
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
index 1242a086c9f948..4c6c843669aaf9 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
@@ -802,7 +802,8 @@ int arm_smmu_master_enable_sva(struct arm_smmu_master *master);
 int arm_smmu_master_disable_sva(struct arm_smmu_master *master);
 bool arm_smmu_master_iopf_supported(struct arm_smmu_master *master);
 void arm_smmu_sva_notifier_synchronize(void);
-struct iommu_domain *arm_smmu_sva_domain_alloc(void);
+struct iommu_domain *arm_smmu_sva_domain_alloc(struct device *dev,
+					       struct mm_struct *mm);
 void arm_smmu_sva_remove_dev_pasid(struct iommu_domain *domain,
 				   struct device *dev, ioasid_t id);
 #else /* CONFIG_ARM_SMMU_V3_SVA */
@@ -848,5 +849,8 @@ static inline void arm_smmu_sva_remove_dev_pasid(struct iommu_domain *domain,
 						 ioasid_t id)
 {
 }
+
+#define arm_smmu_sva_domain_alloc NULL
+
 #endif /* CONFIG_ARM_SMMU_V3_SVA */
 #endif /* _ARM_SMMU_V3_H */
-- 
2.43.2


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