On Tue, 21 May 2024 at 14:16, Gavin Liu (劉哲廷) Gavin.Liu@mediatek.com wrote:
Hi, Sumit,
The corresponding OPTEE-OS pull request and change is here.
As this is an ABI change where I see backwards compatibility is maintained. However, the forwards compatibility requires this change to be backported to stable releases. So for the next version please CC stable ML.
On Mon, 2024-05-20 at 16:16 +0530, Sumit Garg wrote:
External email : Please do not click links or open attachments until you have verified the sender or the content. Hi,
On Tue, 7 May 2024 at 07:31, gavin.liu gavin.liu@mediatek.com wrote:
From: Gavin Liu gavin.liu@mediatek.com
Add timeout value to support self waking when timeout to avoid
waiting
indefinitely.
Signed-off-by: Gavin Liu gavin.liu@mediatek.com
change in v3:
- change the comment in optee_rpc_cmd.h
- add macro for "TEE_ERROR_TIMEOUT"
- change from "TEEC_ERROR_BUSY" to "TEE_ERROR_TIMEOUT"
drivers/tee/optee/notif.c | 9 +++++++-- drivers/tee/optee/optee_private.h | 5 ++++- drivers/tee/optee/optee_rpc_cmd.h | 1 + drivers/tee/optee/rpc.c | 10 ++++++++-- 4 files changed, 20 insertions(+), 5 deletions(-)
FWIW:
Reviewed-by: Sumit Garg sumit.garg@linaro.org
diff --git a/drivers/tee/optee/notif.c b/drivers/tee/optee/notif.c index 0d7878e770cd..1970880c796f 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 429cc20be5cc..424898cdc4e9 100644 --- a/drivers/tee/optee/optee_private.h +++ b/drivers/tee/optee/optee_private.h @@ -26,6 +26,9 @@ #define TEEC_ERROR_BUSY 0xFFFF000D #define TEEC_ERROR_SHORT_BUFFER 0xFFFF0010
+/* API Return Codes are from the GP TEE Internal Core API
Specification */
+#define TEE_ERROR_TIMEOUT 0xFFFF3001
#define TEEC_ORIGIN_COMMS 0x00000002
/* @@ -252,7 +255,7 @@ 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..4576751b490c 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 milliseconds 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 f086812f1179..5de4504665be 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 = TEE_ERROR_TIMEOUT;elsearg->ret = TEEC_ERROR_BAD_PARAMETERS;}
static void handle_rpc_func_cmd_wait(struct optee_msg_arg *arg)
2.18.0
Regards, Gavin Liu
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-Sumit