linux-kernel - [PATCH 3/5 v10] iommu/fsl: Add the window permission flag as a parameter to iommu_window

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Date:	Sat, 23 Mar 2013 04:04:59 +0530
From:	Varun Sethi <Varun.Sethi@...escale.com>
To:	<joro@...tes.org>, <iommu@...ts.linux-foundation.org>,
	<linuxppc-dev@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>,
	<galak@...nel.crashing.org>, <benh@...nel.crashing.org>,
	<scottwood@...escale.com>, <stuart.yoder@...escale.com>
CC:	Varun Sethi <Varun.Sethi@...escale.com>
Subject: [PATCH 3/5 v10] iommu/fsl: Add the window permission flag as a parameter to iommu_window_enable API.

Each iommu window can have access permissions associated with it. Extended the
window_enable API to incorporate window access permissions.

In case of PAMU each window can have its specific set of permissions.

Signed-off-by: Varun Sethi <Varun.Sethi@...escale.com>
---
- no change in v10.

 drivers/iommu/iommu.c |    5 +++--
 include/linux/iommu.h |    7 ++++---
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 39106ec..c4d5265 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -853,12 +853,13 @@ EXPORT_SYMBOL_GPL(iommu_unmap);
 
 
 int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr,
-			       phys_addr_t paddr, u64 size)
+			       phys_addr_t paddr, u64 size, int prot)
 {
 	if (unlikely(domain->ops->domain_window_enable == NULL))
 		return -ENODEV;
 
-	return domain->ops->domain_window_enable(domain, wnd_nr, paddr, size);
+	return domain->ops->domain_window_enable(domain, wnd_nr, paddr, size,
+						 prot);
 }
 EXPORT_SYMBOL_GPL(iommu_domain_window_enable);
 
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 576cc19..02ac111 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -104,7 +104,7 @@ struct iommu_ops {
 
 	/* Window handling functions */
 	int (*domain_window_enable)(struct iommu_domain *domain, u32 wnd_nr,
-				    phys_addr_t paddr, u64 size);
+				    phys_addr_t paddr, u64 size, int prot);
 	void (*domain_window_disable)(struct iommu_domain *domain, u32 wnd_nr);
 	/* Set the numer of window per domain */
 	int (*domain_set_windows)(struct iommu_domain *domain, u32 w_count);
@@ -169,7 +169,8 @@ extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr,
 
 /* Window handling function prototypes */
 extern int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr,
-				      phys_addr_t offset, u64 size);
+				      phys_addr_t offset, u64 size,
+				      int prot);
 extern void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr);
 /**
  * report_iommu_fault() - report about an IOMMU fault to the IOMMU framework
@@ -255,7 +256,7 @@ static inline int iommu_unmap(struct iommu_domain *domain, unsigned long iova,
 
 static inline int iommu_domain_window_enable(struct iommu_domain *domain,
 					     u32 wnd_nr, phys_addr_t paddr,
-					     u64 size)
+					     u64 size, int prot)
 {
 	return -ENODEV;
 }
-- 
1.7.4.1


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