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sfc: Implement auto-negotiation

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Add infrastructure for auto-negotiation of speed, duplex and flow
control.

When using 10Xpress, auto-negotiate flow control.  While we're
at it, clean up the code to warn when partner is not 10GBASE-T
capable.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ben Hutchings 2008-12-12 21:50:46 -08:00 • committed by David S. Miller
parent 177dfcd80f
commit 04cc8cacb0
9 changed files with 479 additions and 161 deletions
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6
drivers/net/sfc/falcon.c
View file

@ -1998,7 +1998,7 @@ void falcon_reconfigure_mac_wrapper(struct efx_nic *efx)
/* Transmission of pause frames when RX crosses the threshold is
* covered by RX_XOFF_MAC_EN and XM_TX_CFG_REG:XM_FCNTL.
* Action on receipt of pause frames is controller by XM_DIS_FCNTL */
tx_fc = !!(efx->flow_control & EFX_FC_TX);
tx_fc = !!(efx->link_fc & EFX_FC_TX);
falcon_read(efx, &reg, RX_CFG_REG_KER);
EFX_SET_OWORD_FIELD_VER(efx, reg, RX_XOFF_MAC_EN, tx_fc);
@ -2328,9 +2328,9 @@ int falcon_probe_port(struct efx_nic *efx)
/* Hardware flow ctrl. FalconA RX FIFO too small for pause generation */
if (falcon_rev(efx) >= FALCON_REV_B0)
efx->flow_control = EFX_FC_RX | EFX_FC_TX;
efx->wanted_fc = EFX_FC_RX | EFX_FC_TX;
else
efx->flow_control = EFX_FC_RX;
efx->wanted_fc = EFX_FC_RX;
/* Allocate buffer for stats */
rc = falcon_alloc_buffer(efx, &efx->stats_buffer,