[PATCH v2 03/24] iommu/arm-smmu: Drop IOVA cookie management

Robin Murphy
2021-07-28T16:01:20Z

The core code bakes its own cookies now.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 7 -------
drivers/iommu/arm/arm-smmu/arm-smmu.c | 15 ++++-----------
drivers/iommu/arm/arm-smmu/qcom_iommu.c | 8 --------
3 files changed, 4 insertions(+), 26 deletions(-)

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 6346f21726f4..4c648da447bf 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -1984,12 +1984,6 @@ static struct iommu_domain *arm_smmu_domain_alloc(unsigned type)
if (!smmu_domain)
return NULL;

- if (type == IOMMU_DOMAIN_DMA &&
- iommu_get_dma_cookie(&smmu_domain->domain)) {
- kfree(smmu_domain);
- return NULL;
- }
-
mutex_init(&smmu_domain->init_mutex);
INIT_LIST_HEAD(&smmu_domain->devices);
spin_lock_init(&smmu_domain->devices_lock);
@@ -2021,7 +2015,6 @@ static void arm_smmu_domain_free(struct iommu_domain *domain)
struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
struct arm_smmu_device *smmu = smmu_domain->smmu;

- iommu_put_dma_cookie(domain);
free_io_pgtable_ops(smmu_domain->pgtbl_ops);

/* Free the CD and ASID, if we allocated them */
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c
index ac21170fa208..970d9e4dcd69 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c
@@ -868,10 +868,10 @@ static struct iommu_domain *arm_smmu_domain_alloc(unsigned type)
{
struct arm_smmu_domain *smmu_domain;

- if (type != IOMMU_DOMAIN_UNMANAGED &&
- type != IOMMU_DOMAIN_DMA &&
- type != IOMMU_DOMAIN_IDENTITY)
- return NULL;
+ if (type != IOMMU_DOMAIN_UNMANAGED && type != IOMMU_DOMAIN_IDENTITY) {
+ if (using_legacy_binding || type != IOMMU_DOMAIN_DMA)
+ return NULL;
+ }
/*
* Allocate the domain and initialise some of its data structures.
* We can't really do anything meaningful until we've added a
@@ -881,12 +881,6 @@ static struct iommu_domain *arm_smmu_domain_alloc(unsigned type)
if (!smmu_domain)
return NULL;

- if (type == IOMMU_DOMAIN_DMA && (using_legacy_binding ||
- iommu_get_dma_cookie(&smmu_domain->domain))) {
- kfree(smmu_domain);
- return NULL;
- }
-
mutex_init(&smmu_domain->init_mutex);
spin_lock_init(&smmu_domain->cb_lock);

@@ -901,7 +895,6 @@ static void arm_smmu_domain_free(struct iommu_domain *domain)
* Free the domain resources. We assume that all devices have
* already been detached.
*/
- iommu_put_dma_cookie(domain);
arm_smmu_destroy_domain_context(domain);
kfree(smmu_domain);
}
diff --git a/drivers/iommu/arm/arm-smmu/qcom_iommu.c b/drivers/iommu/arm/arm-smmu/qcom_iommu.c
index 021cf8f65ffc..4b7eca5f5148 100644
--- a/drivers/iommu/arm/arm-smmu/qcom_iommu.c
+++ b/drivers/iommu/arm/arm-smmu/qcom_iommu.c
@@ -335,12 +335,6 @@ static struct iommu_domain *qcom_iommu_domain_alloc(unsigned type)
if (!qcom_domain)
return NULL;

- if (type == IOMMU_DOMAIN_DMA &&
- iommu_get_dma_cookie(&qcom_domain->domain)) {
- kfree(qcom_domain);
- return NULL;
- }
-
mutex_init(&qcom_domain->init_mutex);
spin_lock_init(&qcom_domain->pgtbl_lock);

@@ -351,8 +345,6 @@ static void qcom_iommu_domain_free(struct iommu_domain *domain)
{
struct qcom_iommu_domain *qcom_domain = to_qcom_iommu_domain(domain);

- iommu_put_dma_cookie(domain);
-
if (qcom_domain->iommu) {
/*
* NOTE: unmap can be called after client device is powered
--
2.25.1