diff mbox series

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

Message ID 1-v7-9597c885796c+d2-smmuv3_newapi_p2b_jgg@nvidia.com (mailing list archive)
State New
Headers show
Series Update SMMUv3 to the modern iommu API (part 2b/3) | expand

Commit Message

Jason Gunthorpe May 8, 2024, 6:57 p.m. UTC 
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(-)

Comments

Nicolin Chen May 9, 2024, 6:21 p.m. UTC | #1 
On Wed, May 08, 2024 at 03:57:09PM -0300, Jason Gunthorpe wrote:

> @@ -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
> +

Just a few lines above, there is still an inline define:
static inline struct iommu_domain *arm_smmu_sva_domain_alloc(void)
{
	return NULL;
}

Should we delete this too?

Nicolin
Jason Gunthorpe May 9, 2024, 6:40 p.m. UTC | #2 
On Thu, May 09, 2024 at 11:21:59AM -0700, Nicolin Chen wrote:
> On Wed, May 08, 2024 at 03:57:09PM -0300, Jason Gunthorpe wrote:
> 
> > @@ -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
> > +
> 
> Just a few lines above, there is still an inline define:
> static inline struct iommu_domain *arm_smmu_sva_domain_alloc(void)
> {
> 	return NULL;
> }
> 
> Should we delete this too?

Yes, thanks, this is a rebasing mistake :|

Jason
diff mbox series

Patch

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 */