OP-TEE May 2024

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[PATCH v2] optee: add timeout value to optee_notif_wait() to support timeout

by gavin.liu

From: Gavin Liu <gavin.liu(a)mediatek.com> Add timeout value to support self waking when timeout to avoid waiting indefinitely. Signed-off-by: Gavin Liu <gavin.liu(a)mediatek.com> --- Change in v2: Change commit message. Add description for value[0].c in optee_rpc_cmd.h. --- --- drivers/tee/optee/notif.c | 9 +++++++-- drivers/tee/optee/optee_private.h | 2 +- drivers/tee/optee/optee_rpc_cmd.h | 1 + drivers/tee/optee/rpc.c | 10 ++++++++-- 4 files changed, 17 insertions(+), 5 deletions(-) diff --git a/drivers/tee/optee/notif.c b/drivers/tee/optee/notif.c index 05212842b0a5..d5e5c0645609 100644 --- a/drivers/tee/optee/notif.c +++ b/drivers/tee/optee/notif.c @@ -29,7 +29,7 @@ static bool have_key(struct optee *optee, u_int key) return false; } -int optee_notif_wait(struct optee *optee, u_int key) +int optee_notif_wait(struct optee *optee, u_int key, u32 timeout) { unsigned long flags; struct notif_entry *entry; @@ -70,7 +70,12 @@ int optee_notif_wait(struct optee *optee, u_int key) * Unlock temporarily and wait for completion. */ spin_unlock_irqrestore(&optee->notif.lock, flags); - wait_for_completion(&entry->c); + if (timeout != 0) { + if (!wait_for_completion_timeout(&entry->c, timeout)) + rc = -ETIMEDOUT; + } else { + wait_for_completion(&entry->c); + } spin_lock_irqsave(&optee->notif.lock, flags); list_del(&entry->link); diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h index 7a5243c78b55..da990c4016ec 100644 --- a/drivers/tee/optee/optee_private.h +++ b/drivers/tee/optee/optee_private.h @@ -252,7 +252,7 @@ struct optee_call_ctx { int optee_notif_init(struct optee *optee, u_int max_key); void optee_notif_uninit(struct optee *optee); -int optee_notif_wait(struct optee *optee, u_int key); +int optee_notif_wait(struct optee *optee, u_int key, u32 timeout); int optee_notif_send(struct optee *optee, u_int key); u32 optee_supp_thrd_req(struct tee_context *ctx, u32 func, size_t num_params, diff --git a/drivers/tee/optee/optee_rpc_cmd.h b/drivers/tee/optee/optee_rpc_cmd.h index f3f06e0994a7..99342aa66263 100644 --- a/drivers/tee/optee/optee_rpc_cmd.h +++ b/drivers/tee/optee/optee_rpc_cmd.h @@ -41,6 +41,7 @@ * Waiting on notification * [in] value[0].a OPTEE_RPC_NOTIFICATION_WAIT * [in] value[0].b notification value + * [in] value[0].c timeout in millisecond or 0 if no timeout * * Sending a synchronous notification * [in] value[0].a OPTEE_RPC_NOTIFICATION_SEND diff --git a/drivers/tee/optee/rpc.c b/drivers/tee/optee/rpc.c index e69bc6380683..14e6246aaf05 100644 --- a/drivers/tee/optee/rpc.c +++ b/drivers/tee/optee/rpc.c @@ -130,6 +130,8 @@ static void handle_rpc_func_cmd_i2c_transfer(struct tee_context *ctx, static void handle_rpc_func_cmd_wq(struct optee *optee, struct optee_msg_arg *arg) { + int rc = 0; + if (arg->num_params != 1) goto bad; @@ -139,7 +141,8 @@ static void handle_rpc_func_cmd_wq(struct optee *optee, switch (arg->params[0].u.value.a) { case OPTEE_RPC_NOTIFICATION_WAIT: - if (optee_notif_wait(optee, arg->params[0].u.value.b)) + rc = optee_notif_wait(optee, arg->params[0].u.value.b, arg->params[0].u.value.c); + if (rc) goto bad; break; case OPTEE_RPC_NOTIFICATION_SEND: @@ -153,7 +156,10 @@ static void handle_rpc_func_cmd_wq(struct optee *optee, arg->ret = TEEC_SUCCESS; return; bad: - arg->ret = TEEC_ERROR_BAD_PARAMETERS; + if (rc == -ETIMEDOUT) + arg->ret = TEEC_ERROR_BUSY; + else + arg->ret = TEEC_ERROR_BAD_PARAMETERS; } static void handle_rpc_func_cmd_wait(struct optee_msg_arg *arg) -- 2.18.0

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