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feat(spmc): add FFA_RX_RELEASE handler 

Enable a partition to release its RX buffer and the SPMC
to update the appropriate state tracking.

Signed-off-by: Marc Bonnici <marc.bonnici@arm.com>
Change-Id: I5fb6d92244b5ed5f032269b29b102aa874bf3ae3
This commit is contained in:
Marc Bonnici 2022-04-12 17:17:45 +01:00
parent aad20c85cb
commit f0c25a082f
1 changed files with 30 additions and 0 deletions
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30
services/std_svc/spm/el3_spmc/spmc_main.c
View File

@ -1011,6 +1011,7 @@ static uint64_t ffa_features_handler(uint32_t smc_fid,
case FFA_ID_GET:
case FFA_FEATURES:
case FFA_VERSION:
case FFA_RX_RELEASE:
case FFA_MSG_SEND_DIRECT_REQ_SMC32:
case FFA_MSG_SEND_DIRECT_REQ_SMC64:
case FFA_PARTITION_INFO_GET:
@ -1145,6 +1146,31 @@ static uint64_t ffa_run_handler(uint32_t smc_fid,
handle, cookie, flags, target_id);
}
static uint64_t rx_release_handler(uint32_t smc_fid,
bool secure_origin,
uint64_t x1,
uint64_t x2,
uint64_t x3,
uint64_t x4,
void *cookie,
void *handle,
uint64_t flags)
{
struct mailbox *mbox = spmc_get_mbox_desc(secure_origin);
spin_lock(&mbox->lock);
if (mbox->state != MAILBOX_STATE_FULL) {
spin_unlock(&mbox->lock);
return spmc_ffa_error_return(handle, FFA_ERROR_DENIED);
}
mbox->state = MAILBOX_STATE_EMPTY;
spin_unlock(&mbox->lock);
SMC_RET1(handle, FFA_SUCCESS_SMC32);
}
/*******************************************************************************
* This function will parse the Secure Partition Manifest. From manifest, it
* will fetch details for preparing Secure partition image context and secure
@ -1573,6 +1599,10 @@ uint64_t spmc_smc_handler(uint32_t smc_fid,
x2, x3, x4, cookie, handle,
flags);
case FFA_RX_RELEASE:
return rx_release_handler(smc_fid, secure_origin, x1, x2, x3,
x4, cookie, handle, flags);
case FFA_MSG_WAIT:
return msg_wait_handler(smc_fid, secure_origin, x1, x2, x3, x4,
cookie, handle, flags);