[PATCH v8 4/7] iommu/arm-smmu: Add a pointer to the attached device to smmu_domain

Jordan Crouse
2020-06-11T22:22:01Z

Add a link to the pointer to the struct device that is attached to a
domain. This makes it easy to get the pointer if it is needed in the
implementation specific code.

Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
---

drivers/iommu/arm-smmu.c | 1 +
drivers/iommu/arm-smmu.h | 1 +
2 files changed, 2 insertions(+)

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 048de2681670..743d75b9ff3f 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -801,6 +801,7 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
cfg->asid = cfg->cbndx;

smmu_domain->smmu = smmu;
+ smmu_domain->dev = dev;

pgtbl_cfg = (struct io_pgtable_cfg) {
.pgsize_bitmap = smmu->pgsize_bitmap,
diff --git a/drivers/iommu/arm-smmu.h b/drivers/iommu/arm-smmu.h
index 5f2de20e883b..d33cfe26b2f5 100644
--- a/drivers/iommu/arm-smmu.h
+++ b/drivers/iommu/arm-smmu.h
@@ -345,6 +345,7 @@ struct arm_smmu_domain {
struct mutex init_mutex; /* Protects smmu pointer */
spinlock_t cb_lock; /* Serialises ATS1* ops and TLB syncs */
struct iommu_domain domain;
+ struct device *dev; /* Device attached to this domain */
};

static inline u32 arm_smmu_lpae_tcr(struct io_pgtable_cfg *cfg)
--
2.17.1