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firmware: stratix10-svc: handle NO_RESPONSE in async poll

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Define INTEL_SIP_SMC_STATUS_NO_RESPONSE (0x3) and handle it in
stratix10_svc_async_poll() the same way as INTEL_SIP_SMC_STATUS_BUSY,
returning -EAGAIN so callers can retry instead of treating the poll as
a hard failure.

When the Secure Device Manager has not yet produced a response for an
asynchronous transaction, ATF is expected to return
INTEL_SIP_SMC_STATUS_NO_RESPONSE. Without this handling, the service
layer maps the status to -EINVAL and async clients cannot distinguish
"not ready yet" from a real error.

Fixes: bcb9f4f070 ("firmware: stratix10-svc: Add support for async communication")
Cc: stable@vger.kernel.org
Signed-off-by: Adrian Ng Ho Yin <adrian.ho.yin.ng@altera.com>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
This commit is contained in:
Adrian Ng Ho Yin 2026-07-14 13:37:46 +08:00 committed by Dinh Nguyen
parent 9b9a6e31bd
commit 9e1dc434ca
2 changed files with 7 additions and 2 deletions
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5
drivers/firmware/stratix10-svc.c
View File

@ -1499,8 +1499,9 @@ int stratix10_svc_async_poll(struct stratix10_svc_chan *chan,
WARN_ON_ONCE(1);
}
return 0;
} else if (handle->res.a0 == INTEL_SIP_SMC_STATUS_BUSY) {
dev_dbg(ctrl->dev, "async message is still in progress\n");
} else if (handle->res.a0 == INTEL_SIP_SMC_STATUS_BUSY ||
handle->res.a0 == INTEL_SIP_SMC_STATUS_NO_RESPONSE) {
dev_dbg(ctrl->dev, "async message is not ready yet\n");
return -EAGAIN;
}

4
include/linux/firmware/intel/stratix10-smc.h
View File

@ -67,6 +67,9 @@
* INTEL_SIP_SMC_STATUS_REJECTED:
* Secure monitor software reject the service client's request.
*
* INTEL_SIP_SMC_STATUS_NO_RESPONSE:
* Secure monitor software has no response for the request yet.
*
* INTEL_SIP_SMC_STATUS_ERROR:
* There is error during the process of service request.
*
@ -77,6 +80,7 @@
#define INTEL_SIP_SMC_STATUS_OK 0x0
#define INTEL_SIP_SMC_STATUS_BUSY 0x1
#define INTEL_SIP_SMC_STATUS_REJECTED 0x2
#define INTEL_SIP_SMC_STATUS_NO_RESPONSE 0x3
#define INTEL_SIP_SMC_STATUS_ERROR 0x4
#define INTEL_SIP_SMC_RSU_ERROR 0x7