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tee: export teedev_open() and teedev_close_context()

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commit 1e2c3ef049 upstream.

Exports the two functions teedev_open() and teedev_close_context() in
order to make it easier to create a driver internal struct tee_context.

Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jens Wiklander 2021-10-04 16:11:52 +02:00 committed by Greg Kroah-Hartman
parent bae7fc6f0d
commit eb35461384
2 changed files with 18 additions and 2 deletions
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6
drivers/tee/tee_core.c
View file

@ -43,7 +43,7 @@ static DEFINE_SPINLOCK(driver_lock);
static struct class *tee_class; static struct class *tee_class;
static dev_t tee_devt; static dev_t tee_devt;
static struct tee_context *teedev_open(struct tee_device *teedev) struct tee_context *teedev_open(struct tee_device *teedev)
{ {
int rc; int rc;
struct tee_context *ctx; struct tee_context *ctx;
@ -70,6 +70,7 @@ static struct tee_context *teedev_open(struct tee_device *teedev)
return ERR_PTR(rc); return ERR_PTR(rc);
} }
EXPORT_SYMBOL_GPL(teedev_open);
void teedev_ctx_get(struct tee_context *ctx) void teedev_ctx_get(struct tee_context *ctx)
{ {
@ -96,13 +97,14 @@ void teedev_ctx_put(struct tee_context *ctx)
kref_put(&ctx->refcount, teedev_ctx_release); kref_put(&ctx->refcount, teedev_ctx_release);
} }
static void teedev_close_context(struct tee_context *ctx) void teedev_close_context(struct tee_context *ctx)
{ {
struct tee_device *teedev = ctx->teedev; struct tee_device *teedev = ctx->teedev;
teedev_ctx_put(ctx); teedev_ctx_put(ctx);
tee_device_put(teedev); tee_device_put(teedev);
} }
EXPORT_SYMBOL_GPL(teedev_close_context);
static int tee_open(struct inode *inode, struct file *filp) static int tee_open(struct inode *inode, struct file *filp)
{ {

14
include/linux/tee_drv.h
View file

@ -582,4 +582,18 @@ struct tee_client_driver {
#define to_tee_client_driver(d) \ #define to_tee_client_driver(d) \
container_of(d, struct tee_client_driver, driver) container_of(d, struct tee_client_driver, driver)
/**
* teedev_open() - Open a struct tee_device
* @teedev: Device to open
*
* @return a pointer to struct tee_context on success or an ERR_PTR on failure.
*/
struct tee_context *teedev_open(struct tee_device *teedev);
/**
* teedev_close_context() - closes a struct tee_context
* @ctx: The struct tee_context to close
*/
void teedev_close_context(struct tee_context *ctx);
#endif /*__TEE_DRV_H*/ #endif /*__TEE_DRV_H*/