[PATCH 02/18] iommu/fsl_pamu: remove fsl_pamu_get_domain_attr

Christoph Hellwig
Tue, 16 Mar 2021 15:38:08 -0000

None of the values returned by this function are ever queried.  Also
remove the DOMAIN_ATTR_FSL_PAMUV1 enum value that is not otherwise used.

Signed-off-by: Christoph Hellwig <hch at lst.de>
Acked-by: Li Yang <leoyang.li at nxp.com>
---
 drivers/iommu/fsl_pamu_domain.c | 30 ------------------------------
 include/linux/iommu.h           |  4 ----
 2 files changed, 34 deletions(-)

diff --git a/drivers/iommu/fsl_pamu_domain.c b/drivers/iommu/fsl_pamu_domain.c
index 53380cf1fa452f..e587ec43f7e750 100644
--- a/drivers/iommu/fsl_pamu_domain.c
+++ b/drivers/iommu/fsl_pamu_domain.c
@@ -832,35 +832,6 @@ static int fsl_pamu_set_domain_attr(struct iommu_domain
*domain,
 	return ret;
 }

-static int fsl_pamu_get_domain_attr(struct iommu_domain *domain,
-				    enum iommu_attr attr_type, void *data)
-{
-	struct fsl_dma_domain *dma_domain = to_fsl_dma_domain(domain);
-	int ret = 0;
-
-	switch (attr_type) {
-	case DOMAIN_ATTR_FSL_PAMU_STASH:
-		memcpy(data, &dma_domain->dma_stash,
-		       sizeof(struct pamu_stash_attribute));
-		break;
-	case DOMAIN_ATTR_FSL_PAMU_ENABLE:
-		*(int *)data = dma_domain->enabled;
-		break;
-	case DOMAIN_ATTR_FSL_PAMUV1:
-		*(int *)data = DOMAIN_ATTR_FSL_PAMUV1;
-		break;
-	case DOMAIN_ATTR_WINDOWS:
-		*(u32 *)data = dma_domain->win_cnt;
-		break;
-	default:
-		pr_debug("Unsupported attribute type\n");
-		ret = -EINVAL;
-		break;
-	}
-
-	return ret;
-}
-
 static struct iommu_group *get_device_iommu_group(struct device *dev)
 {
 	struct iommu_group *group;
@@ -987,7 +958,6 @@ static const struct iommu_ops fsl_pamu_ops = {
 	.domain_window_enable = fsl_pamu_window_enable,
 	.iova_to_phys	= fsl_pamu_iova_to_phys,
 	.domain_set_attr = fsl_pamu_set_domain_attr,
-	.domain_get_attr = fsl_pamu_get_domain_attr,
 	.probe_device	= fsl_pamu_probe_device,
 	.release_device	= fsl_pamu_release_device,
 	.device_group   = fsl_pamu_device_group,
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 47c8b318d8f523..52874ae164dd60 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -104,9 +104,6 @@ enum iommu_cap {
  *  -the actual size of the mapped region of a window must be power
  *   of 2 starting with 4KB and physical address must be naturally
  *   aligned.
- * DOMAIN_ATTR_FSL_PAMUV1 corresponds to the above mentioned contraints.
- * The caller can invoke iommu_domain_get_attr to check if the underlying
- * iommu implementation supports these constraints.
  */

 enum iommu_attr {
@@ -115,7 +112,6 @@ enum iommu_attr {
 	DOMAIN_ATTR_WINDOWS,
 	DOMAIN_ATTR_FSL_PAMU_STASH,
 	DOMAIN_ATTR_FSL_PAMU_ENABLE,
-	DOMAIN_ATTR_FSL_PAMUV1,
 	DOMAIN_ATTR_NESTING,	/* two stages of translation */
 	DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE,
 	DOMAIN_ATTR_IO_PGTABLE_CFG,
--
2.30.1