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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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38
drivers/net/sfc/net_driver.h
View File

@@ -511,6 +511,35 @@ enum efx_mac_type {
EFX_XMAC = 2,
};
static inline unsigned int efx_fc_advertise(enum efx_fc_type wanted_fc)
{
unsigned int adv = 0;
if (wanted_fc & EFX_FC_RX)
adv = ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
if (wanted_fc & EFX_FC_TX)
adv ^= ADVERTISE_PAUSE_ASYM;
return adv;
}
static inline enum efx_fc_type efx_fc_resolve(enum efx_fc_type wanted_fc,
unsigned int lpa)
{
unsigned int adv = efx_fc_advertise(wanted_fc);
if (!(wanted_fc & EFX_FC_AUTO))
return wanted_fc;
if (adv & lpa & ADVERTISE_PAUSE_CAP)
return EFX_FC_RX | EFX_FC_TX;
if (adv & lpa & ADVERTISE_PAUSE_ASYM) {
if (adv & ADVERTISE_PAUSE_CAP)
return EFX_FC_RX;
if (lpa & ADVERTISE_PAUSE_CAP)
return EFX_FC_TX;
}
return 0;
}
/**
* struct efx_mac_operations - Efx MAC operations table
* @reconfigure: Reconfigure MAC. Serialised by the mac_lock
@@ -533,6 +562,8 @@ struct efx_mac_operations {
* @check_hw: Check hardware
* @get_settings: Get ethtool settings. Serialised by the mac_lock.
* @set_settings: Set ethtool settings. Serialised by the mac_lock.
* @set_xnp_advertise: Set abilities advertised in Extended Next Page
* (only needed where AN bit is set in mmds)
* @mmds: MMD presence mask
* @loopbacks: Supported loopback modes mask
*/
@@ -548,6 +579,7 @@ struct efx_phy_operations {
struct ethtool_cmd *ecmd);
int (*set_settings) (struct efx_nic *efx,
struct ethtool_cmd *ecmd);
bool (*set_xnp_advertise) (struct efx_nic *efx, u32);
int mmds;
unsigned loopbacks;
};
@@ -724,11 +756,12 @@ union efx_multicast_hash {
* @mac_up: MAC link state
* @link_up: Link status
* @link_fd: Link is full duplex
* @link_fc: Actualy flow control flags
* @link_speed: Link speed (Mbps)
* @n_link_state_changes: Number of times the link has changed state
* @promiscuous: Promiscuous flag. Protected by netif_tx_lock.
* @multicast_hash: Multicast hash table
* @flow_control: Flow control flags - separate RX/TX so can't use link_options
* @wanted_fc: Wanted flow control flags
* @reconfigure_work: work item for dealing with PHY events
* @loopback_mode: Loopback status
* @loopback_modes: Supported loopback mode bitmask
@@ -805,12 +838,13 @@ struct efx_nic {
bool mac_up;
bool link_up;
bool link_fd;
enum efx_fc_type link_fc;
unsigned int link_speed;
unsigned int n_link_state_changes;
bool promiscuous;
union efx_multicast_hash multicast_hash;
enum efx_fc_type flow_control;
enum efx_fc_type wanted_fc;
struct work_struct reconfigure_work;
atomic_t rx_reset;