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iommu: constify of_phandle_args in xlate

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The xlate callbacks are supposed to translate of_phandle_args to proper
provider without modifying the of_phandle_args.  Make the argument
pointer to const for code safety and readability.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240216144027.185959-2-krzysztof.kozlowski@linaro.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Krzysztof Kozlowski 2024-02-16 15:40:25 +01:00 committed by Joerg Roedel
parent e70e9ecd7c
commit b42a905b6a
16 changed files with 28 additions and 20 deletions
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3
drivers/iommu/apple-dart.c
View File

@ -779,7 +779,8 @@ static void apple_dart_domain_free(struct iommu_domain *domain)
kfree(dart_domain);
}
static int apple_dart_of_xlate(struct device *dev, struct of_phandle_args *args)
static int apple_dart_of_xlate(struct device *dev,
const struct of_phandle_args *args)
{
struct apple_dart_master_cfg *cfg = dev_iommu_priv_get(dev);
struct platform_device *iommu_pdev = of_find_device_by_node(args->np);

3
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
View File

@ -2704,7 +2704,8 @@ static int arm_smmu_enable_nesting(struct iommu_domain *domain)
return ret;
}
static int arm_smmu_of_xlate(struct device *dev, struct of_phandle_args *args)
static int arm_smmu_of_xlate(struct device *dev,
const struct of_phandle_args *args)
{
return iommu_fwspec_add_ids(dev, args->args, 1);
}

3
drivers/iommu/arm/arm-smmu/arm-smmu.c
View File

@ -1551,7 +1551,8 @@ static int arm_smmu_set_pgtable_quirks(struct iommu_domain *domain,
return ret;
}
static int arm_smmu_of_xlate(struct device *dev, struct of_phandle_args *args)
static int arm_smmu_of_xlate(struct device *dev,
const struct of_phandle_args *args)
{
u32 mask, fwid = 0;

3
drivers/iommu/arm/arm-smmu/qcom_iommu.c
View File

@ -546,7 +546,8 @@ static struct iommu_device *qcom_iommu_probe_device(struct device *dev)
return &qcom_iommu->iommu;
}
static int qcom_iommu_of_xlate(struct device *dev, struct of_phandle_args *args)
static int qcom_iommu_of_xlate(struct device *dev,
const struct of_phandle_args *args)
{
struct qcom_iommu_dev *qcom_iommu;
struct platform_device *iommu_pdev;

2
drivers/iommu/exynos-iommu.c
View File

@ -1431,7 +1431,7 @@ static void exynos_iommu_release_device(struct device *dev)
}
static int exynos_iommu_of_xlate(struct device *dev,
struct of_phandle_args *spec)
const struct of_phandle_args *spec)
{
struct platform_device *sysmmu = of_find_device_by_node(spec->np);
struct exynos_iommu_owner *owner = dev_iommu_priv_get(dev);

2
drivers/iommu/iommu.c
View File

@ -2825,7 +2825,7 @@ void iommu_fwspec_free(struct device *dev)
}
EXPORT_SYMBOL_GPL(iommu_fwspec_free);
int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids)
int iommu_fwspec_add_ids(struct device *dev, const u32 *ids, int num_ids)
{
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
int i, new_num;

4
drivers/iommu/ipmmu-vmsa.c
View File

@ -709,7 +709,7 @@ static phys_addr_t ipmmu_iova_to_phys(struct iommu_domain *io_domain,
}
static int ipmmu_init_platform_device(struct device *dev,
struct of_phandle_args *args)
const struct of_phandle_args *args)
{
struct platform_device *ipmmu_pdev;
@ -773,7 +773,7 @@ static bool ipmmu_device_is_allowed(struct device *dev)
}
static int ipmmu_of_xlate(struct device *dev,
struct of_phandle_args *spec)
const struct of_phandle_args *spec)
{
if (!ipmmu_device_is_allowed(dev))
return -ENODEV;

4
drivers/iommu/msm_iommu.c
View File

@ -598,7 +598,7 @@ static void print_ctx_regs(void __iomem *base, int ctx)
static int insert_iommu_master(struct device *dev,
struct msm_iommu_dev **iommu,
struct of_phandle_args *spec)
const struct of_phandle_args *spec)
{
struct msm_iommu_ctx_dev *master = dev_iommu_priv_get(dev);
int sid;
@ -626,7 +626,7 @@ static int insert_iommu_master(struct device *dev,
}
static int qcom_iommu_of_xlate(struct device *dev,
struct of_phandle_args *spec)
const struct of_phandle_args *spec)
{
struct msm_iommu_dev *iommu = NULL, *iter;
unsigned long flags;

3
drivers/iommu/mtk_iommu.c
View File

@ -957,7 +957,8 @@ static struct iommu_group *mtk_iommu_device_group(struct device *dev)
return group;
}
static int mtk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args)
static int mtk_iommu_of_xlate(struct device *dev,
const struct of_phandle_args *args)
{
struct platform_device *m4updev;

3
drivers/iommu/mtk_iommu_v1.c
View File

@ -398,7 +398,8 @@ static const struct iommu_ops mtk_iommu_v1_ops;
* MTK generation one iommu HW only support one iommu domain, and all the client
* sharing the same iova address space.
*/
static int mtk_iommu_v1_create_mapping(struct device *dev, struct of_phandle_args *args)
static int mtk_iommu_v1_create_mapping(struct device *dev,
const struct of_phandle_args *args)
{
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct mtk_iommu_v1_data *data;

2
drivers/iommu/rockchip-iommu.c
View File

@ -1140,7 +1140,7 @@ static void rk_iommu_release_device(struct device *dev)
}
static int rk_iommu_of_xlate(struct device *dev,
struct of_phandle_args *args)
const struct of_phandle_args *args)
{
struct platform_device *iommu_dev;
struct rk_iommudata *data;

3
drivers/iommu/sprd-iommu.c
View File

@ -390,7 +390,8 @@ static struct iommu_device *sprd_iommu_probe_device(struct device *dev)
return &sdev->iommu;
}
static int sprd_iommu_of_xlate(struct device *dev, struct of_phandle_args *args)
static int sprd_iommu_of_xlate(struct device *dev,
const struct of_phandle_args *args)
{
struct platform_device *pdev;

2
drivers/iommu/sun50i-iommu.c
View File

@ -819,7 +819,7 @@ static struct iommu_device *sun50i_iommu_probe_device(struct device *dev)
}
static int sun50i_iommu_of_xlate(struct device *dev,
struct of_phandle_args *args)
const struct of_phandle_args *args)
{
struct platform_device *iommu_pdev = of_find_device_by_node(args->np);
unsigned id = args->args[0];

4
drivers/iommu/tegra-smmu.c
View File

@ -830,7 +830,7 @@ static struct tegra_smmu *tegra_smmu_find(struct device_node *np)
}
static int tegra_smmu_configure(struct tegra_smmu *smmu, struct device *dev,
struct of_phandle_args *args)
const struct of_phandle_args *args)
{
const struct iommu_ops *ops = smmu->iommu.ops;
int err;
@ -959,7 +959,7 @@ static struct iommu_group *tegra_smmu_device_group(struct device *dev)
}
static int tegra_smmu_of_xlate(struct device *dev,
struct of_phandle_args *args)
const struct of_phandle_args *args)
{
struct platform_device *iommu_pdev = of_find_device_by_node(args->np);
struct tegra_mc *mc = platform_get_drvdata(iommu_pdev);

3
drivers/iommu/virtio-iommu.c
View File

@ -1051,7 +1051,8 @@ static struct iommu_group *viommu_device_group(struct device *dev)
return generic_device_group(dev);
}
static int viommu_of_xlate(struct device *dev, struct of_phandle_args *args)
static int viommu_of_xlate(struct device *dev,
const struct of_phandle_args *args)
{
return iommu_fwspec_add_ids(dev, args->args, 1);
}

4
include/linux/iommu.h
View File

@ -567,7 +567,7 @@ struct iommu_ops {
/* Request/Free a list of reserved regions for a device */
void (*get_resv_regions)(struct device *dev, struct list_head *list);
int (*of_xlate)(struct device *dev, struct of_phandle_args *args);
int (*of_xlate)(struct device *dev, const struct of_phandle_args *args);
bool (*is_attach_deferred)(struct device *dev);
/* Per device IOMMU features */
@ -985,7 +985,7 @@ struct iommu_mm_data {
int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
const struct iommu_ops *ops);
void iommu_fwspec_free(struct device *dev);
int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids);
int iommu_fwspec_add_ids(struct device *dev, const u32 *ids, int num_ids);
const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode);
static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)