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firmware: qcom: scm: add OCMEM lock/unlock interface

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Add support for the OCMEM lock/unlock interface that is needed by the
On Chip MEMory (OCMEM) that is present on some Snapdragon devices.

Signed-off-by: Rob Clark <robdclark@gmail.com>
[masneyb@onstation.org: ported to latest kernel; minor reformatting.]
Signed-off-by: Brian Masney <masneyb@onstation.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: Gabriel Francisco <frc.gabrielgmail.com>
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Rob Clark 2019-08-23 05:16:33 -07:00 committed by Rob Clark
parent 198a72c8f9
commit b0a1614fb1
5 changed files with 111 additions and 0 deletions
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35
drivers/firmware/qcom_scm-32.c
View file

@ -442,6 +442,41 @@ int __qcom_scm_hdcp_req(struct device *dev, struct qcom_scm_hdcp_req *req,
req, req_cnt * sizeof(*req), resp, sizeof(*resp));
}
int __qcom_scm_ocmem_lock(struct device *dev, u32 id, u32 offset, u32 size,
u32 mode)
{
struct ocmem_tz_lock {
__le32 id;
__le32 offset;
__le32 size;
__le32 mode;
} request;
request.id = cpu_to_le32(id);
request.offset = cpu_to_le32(offset);
request.size = cpu_to_le32(size);
request.mode = cpu_to_le32(mode);
return qcom_scm_call(dev, QCOM_SCM_OCMEM_SVC, QCOM_SCM_OCMEM_LOCK_CMD,
&request, sizeof(request), NULL, 0);
}
int __qcom_scm_ocmem_unlock(struct device *dev, u32 id, u32 offset, u32 size)
{
struct ocmem_tz_unlock {
__le32 id;
__le32 offset;
__le32 size;
} request;
request.id = cpu_to_le32(id);
request.offset = cpu_to_le32(offset);
request.size = cpu_to_le32(size);
return qcom_scm_call(dev, QCOM_SCM_OCMEM_SVC, QCOM_SCM_OCMEM_UNLOCK_CMD,
&request, sizeof(request), NULL, 0);
}
void __qcom_scm_init(void)
{
}

12
drivers/firmware/qcom_scm-64.c
View file

@ -241,6 +241,18 @@ int __qcom_scm_hdcp_req(struct device *dev, struct qcom_scm_hdcp_req *req,
return ret;
}
int __qcom_scm_ocmem_lock(struct device *dev, uint32_t id, uint32_t offset,
uint32_t size, uint32_t mode)
{
return -ENOTSUPP;
}
int __qcom_scm_ocmem_unlock(struct device *dev, uint32_t id, uint32_t offset,
uint32_t size)
{
return -ENOTSUPP;
}
void __qcom_scm_init(void)
{
u64 cmd;

40
drivers/firmware/qcom_scm.c
View file

@ -191,6 +191,46 @@ bool qcom_scm_pas_supported(u32 peripheral)
}
EXPORT_SYMBOL(qcom_scm_pas_supported);
/**
* qcom_scm_ocmem_lock_available() - is OCMEM lock/unlock interface available
*/
bool qcom_scm_ocmem_lock_available(void)
{
return __qcom_scm_is_call_available(__scm->dev, QCOM_SCM_OCMEM_SVC,
QCOM_SCM_OCMEM_LOCK_CMD);
}
EXPORT_SYMBOL(qcom_scm_ocmem_lock_available);
/**
* qcom_scm_ocmem_lock() - call OCMEM lock interface to assign an OCMEM
* region to the specified initiator
*
* @id: tz initiator id
* @offset: OCMEM offset
* @size: OCMEM size
* @mode: access mode (WIDE/NARROW)
*/
int qcom_scm_ocmem_lock(enum qcom_scm_ocmem_client id, u32 offset, u32 size,
u32 mode)
{
return __qcom_scm_ocmem_lock(__scm->dev, id, offset, size, mode);
}
EXPORT_SYMBOL(qcom_scm_ocmem_lock);
/**
* qcom_scm_ocmem_unlock() - call OCMEM unlock interface to release an OCMEM
* region from the specified initiator
*
* @id: tz initiator id
* @offset: OCMEM offset
* @size: OCMEM size
*/
int qcom_scm_ocmem_unlock(enum qcom_scm_ocmem_client id, u32 offset, u32 size)
{
return __qcom_scm_ocmem_unlock(__scm->dev, id, offset, size);
}
EXPORT_SYMBOL(qcom_scm_ocmem_unlock);
/**
* qcom_scm_pas_init_image() - Initialize peripheral authentication service
* state machine for a given peripheral, using the

9
drivers/firmware/qcom_scm.h
View file

@ -42,6 +42,15 @@ extern int __qcom_scm_hdcp_req(struct device *dev,
extern void __qcom_scm_init(void);
#define QCOM_SCM_OCMEM_SVC 0xf
#define QCOM_SCM_OCMEM_LOCK_CMD 0x1
#define QCOM_SCM_OCMEM_UNLOCK_CMD 0x2
extern int __qcom_scm_ocmem_lock(struct device *dev, u32 id, u32 offset,
u32 size, u32 mode);
extern int __qcom_scm_ocmem_unlock(struct device *dev, u32 id, u32 offset,
u32 size);
#define QCOM_SCM_SVC_PIL 0x2
#define QCOM_SCM_PAS_INIT_IMAGE_CMD 0x1
#define QCOM_SCM_PAS_MEM_SETUP_CMD 0x2

15
include/linux/qcom_scm.h
View file

@ -24,6 +24,16 @@ struct qcom_scm_vmperm {
int perm;
};
enum qcom_scm_ocmem_client {
QCOM_SCM_OCMEM_UNUSED_ID = 0x0,
QCOM_SCM_OCMEM_GRAPHICS_ID,
QCOM_SCM_OCMEM_VIDEO_ID,
QCOM_SCM_OCMEM_LP_AUDIO_ID,
QCOM_SCM_OCMEM_SENSORS_ID,
QCOM_SCM_OCMEM_OTHER_OS_ID,
QCOM_SCM_OCMEM_DEBUG_ID,
};
#define QCOM_SCM_VMID_HLOS 0x3
#define QCOM_SCM_VMID_MSS_MSA 0xF
#define QCOM_SCM_VMID_WLAN 0x18
@ -41,6 +51,11 @@ extern bool qcom_scm_is_available(void);
extern bool qcom_scm_hdcp_available(void);
extern int qcom_scm_hdcp_req(struct qcom_scm_hdcp_req *req, u32 req_cnt,
u32 *resp);
extern bool qcom_scm_ocmem_lock_available(void);
extern int qcom_scm_ocmem_lock(enum qcom_scm_ocmem_client id, u32 offset,
u32 size, u32 mode);
extern int qcom_scm_ocmem_unlock(enum qcom_scm_ocmem_client id, u32 offset,
u32 size);
extern bool qcom_scm_pas_supported(u32 peripheral);
extern int qcom_scm_pas_init_image(u32 peripheral, const void *metadata,
size_t size);