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| author | Etienne Carriere <etienne.carriere@foss.st.com> | 2023-10-30 11:48:11 +0300 |
|---|---|---|
| committer | Jens Wiklander <jens.wiklander@linaro.org> | 2023-11-17 17:48:03 +0300 |
| commit | 45bc2c9b5b230b95cad10f44204d7b28f52b74c0 (patch) | |
| tree | 6af56a13460511b0b5f890026086ceed613d94f1 /drivers/tee/optee/optee_private.h | |
| parent | a9214a8883ceb82df55aa90d1c49ddb85fc1e3d5 (diff) | |
| download | linux-45bc2c9b5b230b95cad10f44204d7b28f52b74c0.tar.xz | |
tee: optee: support tracking system threads
Adds support in the OP-TEE driver to keep track of reserved system
threads. The logic allows one OP-TEE thread to be reserved to TEE system
sessions.
The optee_cq_*() functions are updated to handle this if enabled,
that is when TEE describes how many thread context it supports
and when at least 1 session has registered as a system session
(using tee_client_system_session()).
For sake of simplicity, initialization of call queue management
is factorized into new helper function optee_cq_init().
The SMC ABI part of the driver enables this tracking, but the
FF-A ABI part does not.
Co-developed-by: Jens Wiklander <jens.wiklander@linaro.org>
Co-developed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Etienne Carriere <etienne.carriere@foss.st.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'drivers/tee/optee/optee_private.h')
| -rw-r--r-- | drivers/tee/optee/optee_private.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h index b659a6f521df..7832ccefe6d0 100644 --- a/drivers/tee/optee/optee_private.h +++ b/drivers/tee/optee/optee_private.h @@ -40,15 +40,33 @@ typedef void (optee_invoke_fn)(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, struct arm_smccc_res *); +/* + * struct optee_call_waiter - TEE entry may need to wait for a free TEE thread + * @list_node Reference in waiters list + * @c Waiting completion reference + * @sys_thread True if waiter belongs to a system thread + */ struct optee_call_waiter { struct list_head list_node; struct completion c; + bool sys_thread; }; +/* + * struct optee_call_queue - OP-TEE call queue management + * @mutex Serializes access to this struct + * @waiters List of threads waiting to enter OP-TEE + * @total_thread_count Overall number of thread context in OP-TEE or 0 + * @free_thread_count Number of threads context free in OP-TEE + * @sys_thread_req_count Number of registered system thread sessions + */ struct optee_call_queue { /* Serializes access to this struct */ struct mutex mutex; struct list_head waiters; + int total_thread_count; + int free_thread_count; + int sys_thread_req_count; }; struct optee_notif { @@ -252,6 +270,7 @@ int optee_supp_send(struct tee_context *ctx, u32 ret, u32 num_params, int optee_open_session(struct tee_context *ctx, struct tee_ioctl_open_session_arg *arg, struct tee_param *param); +int optee_system_session(struct tee_context *ctx, u32 session); int optee_close_session_helper(struct tee_context *ctx, u32 session, bool system_thread); int optee_close_session(struct tee_context *ctx, u32 session); @@ -301,6 +320,7 @@ static inline void optee_to_msg_param_value(struct optee_msg_param *mp, mp->u.value.c = p->u.value.c; } +void optee_cq_init(struct optee_call_queue *cq, int thread_count); void optee_cq_wait_init(struct optee_call_queue *cq, struct optee_call_waiter *w, bool sys_thread); void optee_cq_wait_for_completion(struct optee_call_queue *cq, |