* [PATCH v2 2/3] iommu: move pgsize_bitmap from struct iommu_ops to struct iommu_domain
2015-03-20 16:50 [PATCH v2 0/3] Kill off pgsize_bitmap field from struct iommu_ops Will Deacon
2015-03-20 16:50 ` [PATCH v2 1/3] iommu: remove unused priv " Will Deacon
@ 2015-03-20 16:50 ` Will Deacon
2015-03-20 16:58 ` Laurent Pinchart
2015-03-20 16:50 ` [PATCH v2 3/3] iommu: of: enforce const-ness of struct iommu_ops Will Deacon
2 siblings, 1 reply; 6+ messages in thread
From: Will Deacon @ 2015-03-20 16:50 UTC (permalink / raw)
To: linux-arm-kernel
struct iommu_ops contains function pointers for IOMMU driver callbacks
in order to implement the core IOMMU API. Amongst these pointers is
an unsigned long pgsize_bitmap field, which is problematic because the
set of supported page sizes is not necessarily the same across all
instances of a given IOMMU type in the system. Furthermore, the set of
supported page sizes may be restricted following domain initialisation
when a particular page table format is chosen for the domain.
This patch moves the field from iommu_ops into the iommu_domain and
updates all users accordingly.
Acked-by: Daniel Kurtz <djkurtz@chromium.org>
Acked-by: Thierry Reding <treding@nvidia.com>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
---
drivers/iommu/amd_iommu.c | 2 +-
drivers/iommu/arm-smmu.c | 12 +++++-------
drivers/iommu/exynos-iommu.c | 3 ++-
drivers/iommu/intel-iommu.c | 2 +-
drivers/iommu/iommu.c | 16 ++++++++--------
drivers/iommu/ipmmu-vmsa.c | 2 +-
drivers/iommu/msm_iommu.c | 3 ++-
drivers/iommu/omap-iommu.c | 3 ++-
drivers/iommu/rockchip-iommu.c | 2 +-
drivers/iommu/shmobile-iommu.c | 2 +-
drivers/iommu/tegra-gart.c | 2 +-
drivers/iommu/tegra-smmu.c | 3 +--
drivers/vfio/vfio_iommu_type1.c | 2 +-
include/linux/iommu.h | 4 +---
14 files changed, 28 insertions(+), 30 deletions(-)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 48882c126245..83d9e500f737 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -3257,6 +3257,7 @@ static int amd_iommu_domain_init(struct iommu_domain *dom)
dom->geometry.aperture_end = ~0ULL;
dom->geometry.force_aperture = true;
+ dom->pgsize_bitmap = AMD_IOMMU_PGSIZES;
return 0;
out_free:
@@ -3428,7 +3429,6 @@ static const struct iommu_ops amd_iommu_ops = {
.unmap = amd_iommu_unmap,
.map_sg = default_iommu_map_sg,
.iova_to_phys = amd_iommu_iova_to_phys,
- .pgsize_bitmap = AMD_IOMMU_PGSIZES,
};
/*****************************************************************************
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index fc13dd56953e..16980001e73d 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -287,6 +287,7 @@ struct arm_smmu_device {
void __iomem *base;
unsigned long size;
unsigned long pgshift;
+ unsigned long pgsize_bitmap;
#define ARM_SMMU_FEAT_COHERENT_WALK (1 << 0)
#define ARM_SMMU_FEAT_STREAM_MATCH (1 << 1)
@@ -345,8 +346,6 @@ struct arm_smmu_domain {
struct mutex init_mutex; /* Protects smmu pointer */
};
-static struct iommu_ops arm_smmu_ops;
-
static DEFINE_SPINLOCK(arm_smmu_devices_lock);
static LIST_HEAD(arm_smmu_devices);
@@ -911,7 +910,7 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
}
pgtbl_cfg = (struct io_pgtable_cfg) {
- .pgsize_bitmap = arm_smmu_ops.pgsize_bitmap,
+ .pgsize_bitmap = smmu->pgsize_bitmap,
.ias = ias,
.oas = oas,
.tlb = &arm_smmu_gather_ops,
@@ -925,7 +924,7 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
}
/* Update our support page sizes to reflect the page table format */
- arm_smmu_ops.pgsize_bitmap = pgtbl_cfg.pgsize_bitmap;
+ domain->pgsize_bitmap = pgtbl_cfg.pgsize_bitmap;
/* Initialise the context bank with our page table cfg */
arm_smmu_init_context_bank(smmu_domain, &pgtbl_cfg);
@@ -1430,7 +1429,7 @@ out_unlock:
return ret;
}
-static struct iommu_ops arm_smmu_ops = {
+static const struct iommu_ops arm_smmu_ops = {
.capable = arm_smmu_capable,
.domain_init = arm_smmu_domain_init,
.domain_destroy = arm_smmu_domain_destroy,
@@ -1444,7 +1443,6 @@ static struct iommu_ops arm_smmu_ops = {
.remove_device = arm_smmu_remove_device,
.domain_get_attr = arm_smmu_domain_get_attr,
.domain_set_attr = arm_smmu_domain_set_attr,
- .pgsize_bitmap = -1UL, /* Restricted during device attach */
};
static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
@@ -1648,7 +1646,7 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
size |= SZ_64K | SZ_512M;
}
- arm_smmu_ops.pgsize_bitmap &= size;
+ smmu->pgsize_bitmap = size;
dev_notice(smmu->dev, "\tSupported page sizes: 0x%08lx\n", size);
if (smmu->features & ARM_SMMU_FEAT_TRANS_S1)
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index dc14fec4ede1..61beb3114f2c 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -735,6 +735,8 @@ static int exynos_iommu_domain_init(struct iommu_domain *domain)
domain->geometry.aperture_end = ~0UL;
domain->geometry.force_aperture = true;
+ domain->pgsize_bitmap = SECT_SIZE | LPAGE_SIZE | SPAGE_SIZE;
+
domain->priv = priv;
return 0;
@@ -1181,7 +1183,6 @@ static const struct iommu_ops exynos_iommu_ops = {
.iova_to_phys = exynos_iommu_iova_to_phys,
.add_device = exynos_iommu_add_device,
.remove_device = exynos_iommu_remove_device,
- .pgsize_bitmap = SECT_SIZE | LPAGE_SIZE | SPAGE_SIZE,
};
static int __init exynos_iommu_init(void)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index ae4c1a854e57..e1bb010d9b26 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -4363,6 +4363,7 @@ static int intel_iommu_domain_init(struct iommu_domain *domain)
domain->geometry.aperture_end = __DOMAIN_MAX_ADDR(dmar_domain->gaw);
domain->geometry.force_aperture = true;
+ domain->pgsize_bitmap = INTEL_IOMMU_PGSIZES;
return 0;
}
@@ -4605,7 +4606,6 @@ static const struct iommu_ops intel_iommu_ops = {
.iova_to_phys = intel_iommu_iova_to_phys,
.add_device = intel_iommu_add_device,
.remove_device = intel_iommu_remove_device,
- .pgsize_bitmap = INTEL_IOMMU_PGSIZES,
};
static void quirk_iommu_g4x_gfx(struct pci_dev *dev)
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 72e683df0731..48544211221d 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -1025,7 +1025,7 @@ static size_t iommu_pgsize(struct iommu_domain *domain,
pgsize = (1UL << (pgsize_idx + 1)) - 1;
/* throw away page sizes not supported by the hardware */
- pgsize &= domain->ops->pgsize_bitmap;
+ pgsize &= domain->pgsize_bitmap;
/* make sure we're still sane */
BUG_ON(!pgsize);
@@ -1046,11 +1046,11 @@ int iommu_map(struct iommu_domain *domain, unsigned long iova,
int ret = 0;
if (unlikely(domain->ops->map == NULL ||
- domain->ops->pgsize_bitmap == 0UL))
+ domain->pgsize_bitmap == 0UL))
return -ENODEV;
/* find out the minimum page size supported */
- min_pagesz = 1 << __ffs(domain->ops->pgsize_bitmap);
+ min_pagesz = 1 << __ffs(domain->pgsize_bitmap);
/*
* both the virtual address and the physical one, as well as
@@ -1097,11 +1097,11 @@ size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size)
unsigned long orig_iova = iova;
if (unlikely(domain->ops->unmap == NULL ||
- domain->ops->pgsize_bitmap == 0UL))
+ domain->pgsize_bitmap == 0UL))
return -ENODEV;
/* find out the minimum page size supported */
- min_pagesz = 1 << __ffs(domain->ops->pgsize_bitmap);
+ min_pagesz = 1 << __ffs(domain->pgsize_bitmap);
/*
* The virtual address, as well as the size of the mapping, must be
@@ -1147,10 +1147,10 @@ size_t default_iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
unsigned int i, min_pagesz;
int ret;
- if (unlikely(domain->ops->pgsize_bitmap == 0UL))
+ if (unlikely(domain->pgsize_bitmap == 0UL))
return 0;
- min_pagesz = 1 << __ffs(domain->ops->pgsize_bitmap);
+ min_pagesz = 1 << __ffs(domain->pgsize_bitmap);
for_each_sg(sg, s, nents, i) {
phys_addr_t phys = page_to_phys(sg_page(s)) + s->offset;
@@ -1231,7 +1231,7 @@ int iommu_domain_get_attr(struct iommu_domain *domain,
break;
case DOMAIN_ATTR_PAGING:
paging = data;
- *paging = (domain->ops->pgsize_bitmap != 0UL);
+ *paging = (domain->pgsize_bitmap != 0UL);
break;
case DOMAIN_ATTR_WINDOWS:
count = data;
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
index 10186cac7716..5027becc0d9e 100644
--- a/drivers/iommu/ipmmu-vmsa.c
+++ b/drivers/iommu/ipmmu-vmsa.c
@@ -469,6 +469,7 @@ static int ipmmu_domain_init(struct iommu_domain *io_domain)
io_domain->priv = domain;
domain->io_domain = io_domain;
+ domain->pgsize_bitmap = SZ_1G | SZ_2M | SZ_4K;
return 0;
}
@@ -747,7 +748,6 @@ static const struct iommu_ops ipmmu_ops = {
.iova_to_phys = ipmmu_iova_to_phys,
.add_device = ipmmu_add_device,
.remove_device = ipmmu_remove_device,
- .pgsize_bitmap = SZ_1G | SZ_2M | SZ_4K,
};
/* -----------------------------------------------------------------------------
diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c
index e1b05379ca0e..8b623dce8161 100644
--- a/drivers/iommu/msm_iommu.c
+++ b/drivers/iommu/msm_iommu.c
@@ -230,6 +230,8 @@ static int msm_iommu_domain_init(struct iommu_domain *domain)
domain->geometry.aperture_end = (1ULL << 32) - 1;
domain->geometry.force_aperture = true;
+ domain->pgsize_bitmap = MSM_IOMMU_PGSIZES;
+
return 0;
fail_nomem:
@@ -682,7 +684,6 @@ static const struct iommu_ops msm_iommu_ops = {
.unmap = msm_iommu_unmap,
.map_sg = default_iommu_map_sg,
.iova_to_phys = msm_iommu_iova_to_phys,
- .pgsize_bitmap = MSM_IOMMU_PGSIZES,
};
static int __init get_tex_class(int icp, int ocp, int mt, int nos)
diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
index a4ba851825c2..c4b7d343e62a 100644
--- a/drivers/iommu/omap-iommu.c
+++ b/drivers/iommu/omap-iommu.c
@@ -1250,6 +1250,8 @@ static int omap_iommu_domain_init(struct iommu_domain *domain)
domain->geometry.aperture_end = (1ULL << 32) - 1;
domain->geometry.force_aperture = true;
+ domain->pgsize_bitmap = OMAP_IOMMU_PGSIZES;
+
return 0;
fail_nomem:
@@ -1368,7 +1370,6 @@ static const struct iommu_ops omap_iommu_ops = {
.iova_to_phys = omap_iommu_iova_to_phys,
.add_device = omap_iommu_add_device,
.remove_device = omap_iommu_remove_device,
- .pgsize_bitmap = OMAP_IOMMU_PGSIZES,
};
static int __init omap_iommu_init(void)
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index 9f74fddcd304..1155e3abe9c8 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -828,6 +828,7 @@ static int rk_iommu_domain_init(struct iommu_domain *domain)
INIT_LIST_HEAD(&rk_domain->iommus);
domain->priv = rk_domain;
+ domain->pgsize_bitmap = RK_IOMMU_PGSIZE_BITMAP;
return 0;
err_dt:
@@ -961,7 +962,6 @@ static const struct iommu_ops rk_iommu_ops = {
.add_device = rk_iommu_add_device,
.remove_device = rk_iommu_remove_device,
.iova_to_phys = rk_iommu_iova_to_phys,
- .pgsize_bitmap = RK_IOMMU_PGSIZE_BITMAP,
};
static int rk_iommu_probe(struct platform_device *pdev)
diff --git a/drivers/iommu/shmobile-iommu.c b/drivers/iommu/shmobile-iommu.c
index f1b00774e4de..552bde09a69b 100644
--- a/drivers/iommu/shmobile-iommu.c
+++ b/drivers/iommu/shmobile-iommu.c
@@ -101,6 +101,7 @@ static int shmobile_iommu_domain_init(struct iommu_domain *domain)
spin_lock_init(&sh_domain->attached_list_lock);
INIT_LIST_HEAD(&sh_domain->attached_list);
domain->priv = sh_domain;
+ domain->pgsize_bitmap = SZ_1M | SZ_64K | SZ_4K;
return 0;
}
@@ -364,7 +365,6 @@ static const struct iommu_ops shmobile_iommu_ops = {
.map_sg = default_iommu_map_sg,
.iova_to_phys = shmobile_iommu_iova_to_phys,
.add_device = shmobile_iommu_add_device,
- .pgsize_bitmap = SZ_1M | SZ_64K | SZ_4K,
};
int ipmmu_iommu_init(struct shmobile_ipmmu *ipmmu)
diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
index c48da057dbb1..328ae11282f2 100644
--- a/drivers/iommu/tegra-gart.c
+++ b/drivers/iommu/tegra-gart.c
@@ -218,6 +218,7 @@ out:
static int gart_iommu_domain_init(struct iommu_domain *domain)
{
+ domain->pgsize_bitmap = GART_IOMMU_PGSIZES;
return 0;
}
@@ -318,7 +319,6 @@ static const struct iommu_ops gart_iommu_ops = {
.map_sg = default_iommu_map_sg,
.unmap = gart_iommu_unmap,
.iova_to_phys = gart_iommu_iova_to_phys,
- .pgsize_bitmap = GART_IOMMU_PGSIZES,
};
static int tegra_gart_suspend(struct device *dev)
diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index 6e134c7c227f..a423ed9a19da 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -265,6 +265,7 @@ static int tegra_smmu_domain_init(struct iommu_domain *domain)
pd[i] = 0;
domain->priv = as;
+ domain->pgsize_bitmap = SZ_4K;
return 0;
}
@@ -643,8 +644,6 @@ static const struct iommu_ops tegra_smmu_ops = {
.unmap = tegra_smmu_unmap,
.map_sg = default_iommu_map_sg,
.iova_to_phys = tegra_smmu_iova_to_phys,
-
- .pgsize_bitmap = SZ_4K,
};
static void tegra_smmu_ahb_enable(void)
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 57d8c37a002b..afbd7fefa4e6 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -407,7 +407,7 @@ static unsigned long vfio_pgsize_bitmap(struct vfio_iommu *iommu)
mutex_lock(&iommu->lock);
list_for_each_entry(domain, &iommu->domain_list, next)
- bitmap &= domain->domain->ops->pgsize_bitmap;
+ bitmap &= domain->domain->pgsize_bitmap;
mutex_unlock(&iommu->lock);
return bitmap;
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 73b7bb29546c..baa05c09ca1b 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -53,6 +53,7 @@ struct iommu_domain_geometry {
struct iommu_domain {
const struct iommu_ops *ops;
+ unsigned long pgsize_bitmap; /* Bitmap of supported page sizes */
void *priv;
iommu_fault_handler_t handler;
void *handler_token;
@@ -108,7 +109,6 @@ enum iommu_attr {
* @domain_get_attr: Query domain attributes
* @domain_set_attr: Change domain attributes
* @of_xlate: add OF master IDs to iommu grouping
- * @pgsize_bitmap: bitmap of supported page sizes
*/
struct iommu_ops {
bool (*capable)(enum iommu_cap);
@@ -143,8 +143,6 @@ struct iommu_ops {
#ifdef CONFIG_OF_IOMMU
int (*of_xlate)(struct device *dev, struct of_phandle_args *args);
#endif
-
- unsigned long pgsize_bitmap;
};
#define IOMMU_GROUP_NOTIFY_ADD_DEVICE 1 /* Device added */
--
2.1.4
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH v2 3/3] iommu: of: enforce const-ness of struct iommu_ops
2015-03-20 16:50 [PATCH v2 0/3] Kill off pgsize_bitmap field from struct iommu_ops Will Deacon
2015-03-20 16:50 ` [PATCH v2 1/3] iommu: remove unused priv " Will Deacon
2015-03-20 16:50 ` [PATCH v2 2/3] iommu: move pgsize_bitmap from struct iommu_ops to struct iommu_domain Will Deacon
@ 2015-03-20 16:50 ` Will Deacon
2 siblings, 0 replies; 6+ messages in thread
From: Will Deacon @ 2015-03-20 16:50 UTC (permalink / raw)
To: linux-arm-kernel
From: Robin Murphy <Robin.Murphy@arm.com>
With the pgsize_bitmap removed, there is no compelling reason for
the remaining callbacks in struct iommu_ops to be mutable, so enforce
const-ness throughout the core code.
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
---
arch/arm/include/asm/dma-mapping.h | 2 +-
arch/arm/mm/dma-mapping.c | 6 +++---
arch/arm64/include/asm/dma-mapping.h | 3 ++-
drivers/iommu/of_iommu.c | 12 ++++++------
drivers/of/platform.c | 2 +-
include/linux/dma-mapping.h | 2 +-
include/linux/of_iommu.h | 8 ++++----
7 files changed, 18 insertions(+), 17 deletions(-)
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index b52101d37ec7..c366edc22d02 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -123,7 +123,7 @@ static inline unsigned long dma_max_pfn(struct device *dev)
#define arch_setup_dma_ops arch_setup_dma_ops
extern void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
- struct iommu_ops *iommu, bool coherent);
+ const struct iommu_ops *iommu, bool coherent);
#define arch_teardown_dma_ops arch_teardown_dma_ops
extern void arch_teardown_dma_ops(struct device *dev);
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 170a116d1b29..fd3134fd0c89 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -2020,7 +2020,7 @@ static struct dma_map_ops *arm_get_iommu_dma_map_ops(bool coherent)
}
static bool arm_setup_iommu_dma_ops(struct device *dev, u64 dma_base, u64 size,
- struct iommu_ops *iommu)
+ const struct iommu_ops *iommu)
{
struct dma_iommu_mapping *mapping;
@@ -2058,7 +2058,7 @@ static void arm_teardown_iommu_dma_ops(struct device *dev)
#else
static bool arm_setup_iommu_dma_ops(struct device *dev, u64 dma_base, u64 size,
- struct iommu_ops *iommu)
+ const struct iommu_ops *iommu)
{
return false;
}
@@ -2075,7 +2075,7 @@ static struct dma_map_ops *arm_get_dma_map_ops(bool coherent)
}
void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
- struct iommu_ops *iommu, bool coherent)
+ const struct iommu_ops *iommu, bool coherent)
{
struct dma_map_ops *dma_ops;
diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h
index 6932bb57dba0..2fbf8570d9bc 100644
--- a/arch/arm64/include/asm/dma-mapping.h
+++ b/arch/arm64/include/asm/dma-mapping.h
@@ -46,7 +46,8 @@ static inline struct dma_map_ops *get_dma_ops(struct device *dev)
}
static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
- struct iommu_ops *iommu, bool coherent)
+ const struct iommu_ops *iommu,
+ bool coherent)
{
dev->archdata.dma_coherent = coherent;
}
diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c
index af1dc6a1c0a1..17d39b419e7b 100644
--- a/drivers/iommu/of_iommu.c
+++ b/drivers/iommu/of_iommu.c
@@ -98,12 +98,12 @@ EXPORT_SYMBOL_GPL(of_get_dma_window);
struct of_iommu_node {
struct list_head list;
struct device_node *np;
- struct iommu_ops *ops;
+ const struct iommu_ops *ops;
};
static LIST_HEAD(of_iommu_list);
static DEFINE_SPINLOCK(of_iommu_lock);
-void of_iommu_set_ops(struct device_node *np, struct iommu_ops *ops)
+void of_iommu_set_ops(struct device_node *np, const struct iommu_ops *ops)
{
struct of_iommu_node *iommu = kzalloc(sizeof(*iommu), GFP_KERNEL);
@@ -118,10 +118,10 @@ void of_iommu_set_ops(struct device_node *np, struct iommu_ops *ops)
spin_unlock(&of_iommu_lock);
}
-struct iommu_ops *of_iommu_get_ops(struct device_node *np)
+const struct iommu_ops *of_iommu_get_ops(struct device_node *np)
{
struct of_iommu_node *node;
- struct iommu_ops *ops = NULL;
+ const struct iommu_ops *ops = NULL;
spin_lock(&of_iommu_lock);
list_for_each_entry(node, &of_iommu_list, list)
@@ -133,11 +133,11 @@ struct iommu_ops *of_iommu_get_ops(struct device_node *np)
return ops;
}
-struct iommu_ops *of_iommu_configure(struct device *dev)
+const struct iommu_ops *of_iommu_configure(struct device *dev)
{
struct of_phandle_args iommu_spec;
struct device_node *np;
- struct iommu_ops *ops = NULL;
+ const struct iommu_ops *ops = NULL;
int idx = 0;
/*
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index b189733a1539..d7df0ea4f14b 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -167,7 +167,7 @@ static void of_dma_configure(struct device *dev)
int ret;
bool coherent;
unsigned long offset;
- struct iommu_ops *iommu;
+ const struct iommu_ops *iommu;
/*
* Set default dma-mask to 32 bit. Drivers are expected to setup
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index c3007cb4bfa6..68840b87a444 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -131,7 +131,7 @@ extern u64 dma_get_required_mask(struct device *dev);
#ifndef arch_setup_dma_ops
static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base,
- u64 size, struct iommu_ops *iommu,
+ u64 size, const struct iommu_ops *iommu,
bool coherent) { }
#endif
diff --git a/include/linux/of_iommu.h b/include/linux/of_iommu.h
index 16c75547d725..ea564d53c79d 100644
--- a/include/linux/of_iommu.h
+++ b/include/linux/of_iommu.h
@@ -12,7 +12,7 @@ extern int of_get_dma_window(struct device_node *dn, const char *prefix,
size_t *size);
extern void of_iommu_init(void);
-extern struct iommu_ops *of_iommu_configure(struct device *dev);
+extern const struct iommu_ops *of_iommu_configure(struct device *dev);
#else
@@ -24,15 +24,15 @@ static inline int of_get_dma_window(struct device_node *dn, const char *prefix,
}
static inline void of_iommu_init(void) { }
-static inline struct iommu_ops *of_iommu_configure(struct device *dev)
+static inline const struct iommu_ops *of_iommu_configure(struct device *dev)
{
return NULL;
}
#endif /* CONFIG_OF_IOMMU */
-void of_iommu_set_ops(struct device_node *np, struct iommu_ops *ops);
-struct iommu_ops *of_iommu_get_ops(struct device_node *np);
+void of_iommu_set_ops(struct device_node *np, const struct iommu_ops *ops);
+const struct iommu_ops *of_iommu_get_ops(struct device_node *np);
extern struct of_device_id __iommu_of_table;
--
2.1.4
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