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[intel] Fix operation when physical function has jumbo frames enabled

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When jumbo frames are enabled, the Linux ixgbe physical function
driver will disable the virtual function's receive datapath by
default, and will enable it only if the virtual function negotiates
API version 1.1 (or higher) and explicitly selects an MTU.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2015-05-19 12:20:37 +01:00
parent 51b6a1c835
commit 99f87b2338
4 changed files with 134 additions and 2 deletions
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41
src/drivers/net/intelvf.c
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@@ -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;
}