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firmware: qcom_scm: add two scm calls for iommu secure page table 

Those two new SCM calls are needed from qcom-iommu driver in order
to initialize secure iommu page table.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
This commit is contained in:
Stanimir Varbanov 2017-03-14 11:18:04 -04:00 committed by Andy Gross
parent a2c680c6ce
commit b182cc4d59
5 changed files with 76 additions and 0 deletions
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12
drivers/firmware/qcom_scm-32.c
View File

@ -584,3 +584,15 @@ int __qcom_scm_restore_sec_cfg(struct device *dev, u32 device_id,
{
return -ENODEV;
}
int __qcom_scm_iommu_secure_ptbl_size(struct device *dev, u32 spare,
size_t *size)
{
return -ENODEV;
}
int __qcom_scm_iommu_secure_ptbl_init(struct device *dev, u64 addr, u32 size,
u32 spare)
{
return -ENODEV;
}

42
drivers/firmware/qcom_scm-64.c
View File

@ -397,3 +397,45 @@ int __qcom_scm_restore_sec_cfg(struct device *dev, u32 device_id, u32 spare)
return ret ? : res.a1;
}
int __qcom_scm_iommu_secure_ptbl_size(struct device *dev, u32 spare,
size_t *size)
{
struct qcom_scm_desc desc = {0};
struct arm_smccc_res res;
int ret;
desc.args[0] = spare;
desc.arginfo = QCOM_SCM_ARGS(1);
ret = qcom_scm_call(dev, QCOM_SCM_SVC_MP,
QCOM_SCM_IOMMU_SECURE_PTBL_SIZE, &desc, &res);
if (size)
*size = res.a1;
return ret ? : res.a2;
}
int __qcom_scm_iommu_secure_ptbl_init(struct device *dev, u64 addr, u32 size,
u32 spare)
{
struct qcom_scm_desc desc = {0};
struct arm_smccc_res res;
int ret;
desc.args[0] = addr;
desc.args[1] = size;
desc.args[2] = spare;
desc.arginfo = QCOM_SCM_ARGS(3, QCOM_SCM_RW, QCOM_SCM_VAL,
QCOM_SCM_VAL);
ret = qcom_scm_call(dev, QCOM_SCM_SVC_MP,
QCOM_SCM_IOMMU_SECURE_PTBL_INIT, &desc, &res);
/* the pg table has been initialized already, ignore the error */
if (ret == -EPERM)
ret = 0;
return ret;
}

12
drivers/firmware/qcom_scm.c
View File

@ -321,6 +321,18 @@ int qcom_scm_restore_sec_cfg(u32 device_id, u32 spare)
}
EXPORT_SYMBOL(qcom_scm_restore_sec_cfg);
int qcom_scm_iommu_secure_ptbl_size(u32 spare, size_t *size)
{
return __qcom_scm_iommu_secure_ptbl_size(__scm->dev, spare, size);
}
EXPORT_SYMBOL(qcom_scm_iommu_secure_ptbl_size);
int qcom_scm_iommu_secure_ptbl_init(u64 addr, u32 size, u32 spare)
{
return __qcom_scm_iommu_secure_ptbl_init(__scm->dev, addr, size, spare);
}
EXPORT_SYMBOL(qcom_scm_iommu_secure_ptbl_init);
/**
* qcom_scm_is_available() - Checks if SCM is available
*/

6
drivers/firmware/qcom_scm.h
View File

@ -89,5 +89,11 @@ static inline int qcom_scm_remap_error(int err)
#define QCOM_SCM_RESTORE_SEC_CFG 2
extern int __qcom_scm_restore_sec_cfg(struct device *dev, u32 device_id,
u32 spare);
#define QCOM_SCM_IOMMU_SECURE_PTBL_SIZE 3
#define QCOM_SCM_IOMMU_SECURE_PTBL_INIT 4
extern int __qcom_scm_iommu_secure_ptbl_size(struct device *dev, u32 spare,
size_t *size);
extern int __qcom_scm_iommu_secure_ptbl_init(struct device *dev, u64 addr,
u32 size, u32 spare);
#endif

4
include/linux/qcom_scm.h
View File

@ -41,6 +41,8 @@ extern void qcom_scm_cpu_power_down(u32 flags);
extern u32 qcom_scm_get_version(void);
extern int qcom_scm_set_remote_state(u32 state, u32 id);
extern int qcom_scm_restore_sec_cfg(u32 device_id, u32 spare);
extern int qcom_scm_iommu_secure_ptbl_size(u32 spare, size_t *size);
extern int qcom_scm_iommu_secure_ptbl_init(u64 addr, u32 size, u32 spare);
#else
static inline
int qcom_scm_set_cold_boot_addr(void *entry, const cpumask_t *cpus)
@ -69,5 +71,7 @@ static inline u32 qcom_scm_get_version(void) { return 0; }
static inline u32
qcom_scm_set_remote_state(u32 state,u32 id) { return -ENODEV; }
static inline int qcom_scm_restore_sec_cfg(u32 device_id, u32 spare) { return -ENODEV; }
static inline int qcom_scm_iommu_secure_ptbl_size(u32 spare, size_t *size) { return -ENODEV; }
static inline int qcom_scm_iommu_secure_ptbl_init(u64 addr, u32 size, u32 spare) { return -ENODEV; }
#endif
#endif