diff options
Diffstat (limited to 'src/drivers/net/intelvf.c')
| -rw-r--r-- | src/drivers/net/intelvf.c | 41 |
1 files changed, 39 insertions, 2 deletions
diff --git a/src/drivers/net/intelvf.c b/src/drivers/net/intelvf.c index c8d3a4d2..ac6fea74 100644 --- a/src/drivers/net/intelvf.c +++ b/src/drivers/net/intelvf.c @@ -146,8 +146,7 @@ int intelvf_mbox_wait ( struct intel_nic *intel ) { * @v msg Message buffer * @ret rc Return status code */ -static int intelvf_mbox_msg ( struct intel_nic *intel, - union intelvf_msg *msg ) { +int intelvf_mbox_msg ( struct intel_nic *intel, union intelvf_msg *msg ) { struct intel_mailbox *mbox = &intel->mbox; uint32_t ctrl; uint32_t seen = 0; @@ -301,3 +300,41 @@ int intelvf_mbox_set_mac ( struct intel_nic *intel, const uint8_t *ll_addr ) { return 0; } + +/** + * Send set MTU message + * + * @v intel Intel device + * @v mtu Maximum packet size + * @ret rc Return status code + */ +int intelvf_mbox_set_mtu ( struct intel_nic *intel, size_t mtu ) { + union intelvf_msg msg; + int rc; + + /* Send set MTU message */ + memset ( &msg, 0, sizeof ( msg ) ); + msg.hdr = INTELVF_MSG_TYPE_SET_MTU; + msg.mtu.mtu = mtu; + if ( ( rc = intelvf_mbox_msg ( intel, &msg ) ) != 0 ) { + DBGC ( intel, "INTEL %p set MTU failed: %s\n", + intel, strerror ( rc ) ); + return rc; + } + + /* Check response */ + if ( ( msg.hdr & INTELVF_MSG_TYPE_MASK ) != INTELVF_MSG_TYPE_SET_MTU ) { + DBGC ( intel, "INTEL %p set MTU unexpected response:\n", + intel ); + DBGC_HDA ( intel, 0, &msg, sizeof ( msg ) ); + return -EPROTO; + } + + /* Check that we were allowed to set the MTU */ + if ( ! ( msg.hdr & INTELVF_MSG_ACK ) ) { + DBGC ( intel, "INTEL %p set MTU refused\n", intel ); + return -EPERM; + } + + return 0; +} |