linux-kernel - [PATCH v3 02/25] iommu/amd: Drop IOVA cookie management

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Message-Id: <ebc82f082d5fde58557efbec66f34b1be6a12599.1628094600.git.robin.murphy@arm.com>
Date:   Wed,  4 Aug 2021 18:15:30 +0100
From:   Robin Murphy <robin.murphy@....com>
To:     joro@...tes.org, will@...nel.org
Cc:     iommu@...ts.linux-foundation.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        suravee.suthikulpanit@....com, baolu.lu@...ux.intel.com,
        john.garry@...wei.com, dianders@...omium.org, rajatja@...gle.com,
        chenxiang66@...ilicon.com
Subject: [PATCH v3 02/25] iommu/amd: Drop IOVA cookie management

The core code bakes its own cookies now.

Signed-off-by: Robin Murphy <robin.murphy@....com>

---

v3: Also remove unneeded include
---
 drivers/iommu/amd/iommu.c | 13 -------------
 1 file changed, 13 deletions(-)

diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 52fe2326042a..92f7cbe3d14a 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -20,7 +20,6 @@
 #include <linux/scatterlist.h>
 #include <linux/dma-map-ops.h>
 #include <linux/dma-direct.h>
-#include <linux/dma-iommu.h>
 #include <linux/iommu-helper.h>
 #include <linux/delay.h>
 #include <linux/amd-iommu.h>
@@ -1918,16 +1917,7 @@ static struct iommu_domain *amd_iommu_domain_alloc(unsigned type)
 	domain->domain.geometry.aperture_end   = ~0ULL;
 	domain->domain.geometry.force_aperture = true;
 
-	if (type == IOMMU_DOMAIN_DMA &&
-	    iommu_get_dma_cookie(&domain->domain) == -ENOMEM)
-		goto free_domain;
-
 	return &domain->domain;
-
-free_domain:
-	protection_domain_free(domain);
-
-	return NULL;
 }
 
 static void amd_iommu_domain_free(struct iommu_domain *dom)
@@ -1944,9 +1934,6 @@ static void amd_iommu_domain_free(struct iommu_domain *dom)
 	if (!dom)
 		return;
 
-	if (dom->type == IOMMU_DOMAIN_DMA)
-		iommu_put_dma_cookie(&domain->domain);
-
 	if (domain->flags & PD_IOMMUV2_MASK)
 		free_gcr3_table(domain);
 
-- 
2.25.1