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plat-k3: Add locks for TI-SCI protocol #7089

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plat-k3: Add locks for TI-SCI protocol #7089

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6b7f2b2
plat-k3: drivers: Add mutex lock for ti_sci_do_xfer
manorit2001 Oct 8, 2024
5336f69
plat-k3: drivers: Move message_sequence updates inside ti_sci_do_xfer
manorit2001 Oct 29, 2024
2886a65
plat-k3: drivers: Refactor to ti_sci_send_request
manorit2001 Oct 30, 2024
58cf0c1
plat-k3: drivers: Add some trace message for TI-SCI calls
manorit2001 Oct 30, 2024
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12 changes: 9 additions & 3 deletions core/arch/arm/plat-k3/drivers/ti_sci.c
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@
*/

#include <assert.h>
#include <kernel/thread.h>
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prefer kernel/mutex.h for mutex support.

#include <malloc.h>
#include <platform_config.h>
#include <string.h>
Expand All @@ -20,6 +21,7 @@
#include "ti_sci_protocol.h"

static uint8_t message_sequence;
static struct mutex ti_sci_mutex_lock = MUTEX_INITIALIZER;

/**
* struct ti_sci_xfer - Structure representing a message flow
Expand Down Expand Up @@ -136,22 +138,26 @@ static inline int ti_sci_do_xfer(struct ti_sci_xfer *xfer)
struct k3_sec_proxy_msg *msg = &xfer->tx_message;
int ret = 0;

mutex_lock(&ti_sci_mutex_lock);

/* Send the message */
ret = k3_sec_proxy_send(msg);
if (ret) {
EMSG("Message sending failed (%d)", ret);
return ret;
goto unlock;
}

/* Get the response */
ret = ti_sci_get_response(xfer);
if (ret) {
if ((TEE_Result)ret != TEE_ERROR_ACCESS_DENIED)
EMSG("Failed to get response (%d)", ret);
return ret;
goto unlock;
}

return 0;
unlock:
mutex_unlock(&ti_sci_mutex_lock);
return ret;
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By the way and out of the scope of this change: I see k3_sec_proxy_xxx() return TEE_Result values while caller use int. Likely something to be fixed at some point of time.

}

int ti_sci_get_revision(struct ti_sci_msg_resp_version *rev_info)
Expand Down