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linux/drivers/net/sfc/falcon_gmac.c
Ben Hutchings d3245b28ef sfc: Refactor link configuration 
Refactor PHY, MAC and NIC configuration operations so that the
existing link configuration can be re-pushed with:

	efx->phy_op->reconfigure(efx);
	efx->mac_op->reconfigure(efx);

and a new configuration with:

	efx->nic_op->reconfigure_port(efx);

(plus locking and error-checking).

We have not held the link settings in software (aside from flow
control), and have relied on asking the hardware what they are.  This
is a problem because in some cases the hardware may no longer be in a
state to tell us.  In particular, if an entire multi-port board is
reset through one port, the driver bindings to other ports have no
chance to save settings before recovering.

We only actually need to keep track of the autonegotiation settings,
so add an ethtool advertising mask to struct efx_nic, initialise it
in PHY init and update it as necessary.

Remove now-unneeded uses of efx_phy_op::{get,set}_settings() and
struct ethtool_cmd.

Much of this was done by Steve Hodgson <shodgson@solarflare.com>.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-29 16:46:28 -08:00

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/****************************************************************************
* Driver for Solarflare Solarstorm network controllers and boards
* Copyright 2005-2006 Fen Systems Ltd.
* Copyright 2006-2008 Solarflare Communications Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, incorporated herein by reference.
*/
#include <linux/delay.h>
#include "net_driver.h"
#include "efx.h"
#include "falcon.h"
#include "mac.h"
#include "regs.h"
#include "io.h"
/**************************************************************************
*
* MAC operations
*
*************************************************************************/
static int falcon_reconfigure_gmac(struct efx_nic *efx)
{
struct efx_link_state *link_state = &efx->link_state;
bool loopback, tx_fc, rx_fc, bytemode;
int if_mode;
unsigned int max_frame_len;
efx_oword_t reg;
/* Configuration register 1 */
tx_fc = (link_state->fc & EFX_FC_TX) || !link_state->fd;
rx_fc = !!(link_state->fc & EFX_FC_RX);
loopback = (efx->loopback_mode == LOOPBACK_GMAC);
bytemode = (link_state->speed == 1000);
EFX_POPULATE_OWORD_5(reg,
FRF_AB_GM_LOOP, loopback,
FRF_AB_GM_TX_EN, 1,
FRF_AB_GM_TX_FC_EN, tx_fc,
FRF_AB_GM_RX_EN, 1,
FRF_AB_GM_RX_FC_EN, rx_fc);
efx_writeo(efx, &reg, FR_AB_GM_CFG1);
udelay(10);
/* Configuration register 2 */
if_mode = (bytemode) ? 2 : 1;
EFX_POPULATE_OWORD_5(reg,
FRF_AB_GM_IF_MODE, if_mode,
FRF_AB_GM_PAD_CRC_EN, 1,
FRF_AB_GM_LEN_CHK, 1,
FRF_AB_GM_FD, link_state->fd,
FRF_AB_GM_PAMBL_LEN, 0x7/*datasheet recommended */);
efx_writeo(efx, &reg, FR_AB_GM_CFG2);
udelay(10);
/* Max frame len register */
max_frame_len = EFX_MAX_FRAME_LEN(efx->net_dev->mtu);
EFX_POPULATE_OWORD_1(reg, FRF_AB_GM_MAX_FLEN, max_frame_len);
efx_writeo(efx, &reg, FR_AB_GM_MAX_FLEN);
udelay(10);
/* FIFO configuration register 0 */
EFX_POPULATE_OWORD_5(reg,
FRF_AB_GMF_FTFENREQ, 1,
FRF_AB_GMF_STFENREQ, 1,
FRF_AB_GMF_FRFENREQ, 1,
FRF_AB_GMF_SRFENREQ, 1,
FRF_AB_GMF_WTMENREQ, 1);
efx_writeo(efx, &reg, FR_AB_GMF_CFG0);
udelay(10);
/* FIFO configuration register 1 */
EFX_POPULATE_OWORD_2(reg,
FRF_AB_GMF_CFGFRTH, 0x12,
FRF_AB_GMF_CFGXOFFRTX, 0xffff);
efx_writeo(efx, &reg, FR_AB_GMF_CFG1);
udelay(10);
/* FIFO configuration register 2 */
EFX_POPULATE_OWORD_2(reg,
FRF_AB_GMF_CFGHWM, 0x3f,
FRF_AB_GMF_CFGLWM, 0xa);
efx_writeo(efx, &reg, FR_AB_GMF_CFG2);
udelay(10);
/* FIFO configuration register 3 */
EFX_POPULATE_OWORD_2(reg,
FRF_AB_GMF_CFGHWMFT, 0x1c,
FRF_AB_GMF_CFGFTTH, 0x08);
efx_writeo(efx, &reg, FR_AB_GMF_CFG3);
udelay(10);
/* FIFO configuration register 4 */
EFX_POPULATE_OWORD_1(reg, FRF_AB_GMF_HSTFLTRFRM_PAUSE, 1);
efx_writeo(efx, &reg, FR_AB_GMF_CFG4);
udelay(10);
/* FIFO configuration register 5 */
efx_reado(efx, &reg, FR_AB_GMF_CFG5);
EFX_SET_OWORD_FIELD(reg, FRF_AB_GMF_CFGBYTMODE, bytemode);
EFX_SET_OWORD_FIELD(reg, FRF_AB_GMF_CFGHDPLX, !link_state->fd);
EFX_SET_OWORD_FIELD(reg, FRF_AB_GMF_HSTDRPLT64, !link_state->fd);
EFX_SET_OWORD_FIELD(reg, FRF_AB_GMF_HSTFLTRFRMDC_PAUSE, 0);
efx_writeo(efx, &reg, FR_AB_GMF_CFG5);
udelay(10);
/* MAC address */
EFX_POPULATE_OWORD_4(reg,
FRF_AB_GM_ADR_B0, efx->net_dev->dev_addr[5],
FRF_AB_GM_ADR_B1, efx->net_dev->dev_addr[4],
FRF_AB_GM_ADR_B2, efx->net_dev->dev_addr[3],
FRF_AB_GM_ADR_B3, efx->net_dev->dev_addr[2]);
efx_writeo(efx, &reg, FR_AB_GM_ADR1);
udelay(10);
EFX_POPULATE_OWORD_2(reg,
FRF_AB_GM_ADR_B4, efx->net_dev->dev_addr[1],
FRF_AB_GM_ADR_B5, efx->net_dev->dev_addr[0]);
efx_writeo(efx, &reg, FR_AB_GM_ADR2);
udelay(10);
falcon_reconfigure_mac_wrapper(efx);
return 0;
}
static void falcon_update_stats_gmac(struct efx_nic *efx)
{
struct efx_mac_stats *mac_stats = &efx->mac_stats;
unsigned long old_rx_pause, old_tx_pause;
unsigned long new_rx_pause, new_tx_pause;
/* Pause frames are erroneously counted as errors (SFC bug 3269) */
old_rx_pause = mac_stats->rx_pause;
old_tx_pause = mac_stats->tx_pause;
/* Update MAC stats from DMAed values */
FALCON_STAT(efx, GRxGoodOct, rx_good_bytes);
FALCON_STAT(efx, GRxBadOct, rx_bad_bytes);
FALCON_STAT(efx, GRxMissPkt, rx_missed);
FALCON_STAT(efx, GRxFalseCRS, rx_false_carrier);
FALCON_STAT(efx, GRxPausePkt, rx_pause);
FALCON_STAT(efx, GRxBadPkt, rx_bad);
FALCON_STAT(efx, GRxUcastPkt, rx_unicast);
FALCON_STAT(efx, GRxMcastPkt, rx_multicast);
FALCON_STAT(efx, GRxBcastPkt, rx_broadcast);
FALCON_STAT(efx, GRxGoodLt64Pkt, rx_good_lt64);
FALCON_STAT(efx, GRxBadLt64Pkt, rx_bad_lt64);
FALCON_STAT(efx, GRx64Pkt, rx_64);
FALCON_STAT(efx, GRx65to127Pkt, rx_65_to_127);
FALCON_STAT(efx, GRx128to255Pkt, rx_128_to_255);
FALCON_STAT(efx, GRx256to511Pkt, rx_256_to_511);
FALCON_STAT(efx, GRx512to1023Pkt, rx_512_to_1023);
FALCON_STAT(efx, GRx1024to15xxPkt, rx_1024_to_15xx);
FALCON_STAT(efx, GRx15xxtoJumboPkt, rx_15xx_to_jumbo);
FALCON_STAT(efx, GRxGtJumboPkt, rx_gtjumbo);
FALCON_STAT(efx, GRxFcsErr64to15xxPkt, rx_bad_64_to_15xx);
FALCON_STAT(efx, GRxFcsErr15xxtoJumboPkt, rx_bad_15xx_to_jumbo);
FALCON_STAT(efx, GRxFcsErrGtJumboPkt, rx_bad_gtjumbo);
FALCON_STAT(efx, GTxGoodBadOct, tx_bytes);
FALCON_STAT(efx, GTxGoodOct, tx_good_bytes);
FALCON_STAT(efx, GTxSglColPkt, tx_single_collision);
FALCON_STAT(efx, GTxMultColPkt, tx_multiple_collision);
FALCON_STAT(efx, GTxExColPkt, tx_excessive_collision);
FALCON_STAT(efx, GTxDefPkt, tx_deferred);
FALCON_STAT(efx, GTxLateCol, tx_late_collision);
FALCON_STAT(efx, GTxExDefPkt, tx_excessive_deferred);
FALCON_STAT(efx, GTxPausePkt, tx_pause);
FALCON_STAT(efx, GTxBadPkt, tx_bad);
FALCON_STAT(efx, GTxUcastPkt, tx_unicast);
FALCON_STAT(efx, GTxMcastPkt, tx_multicast);
FALCON_STAT(efx, GTxBcastPkt, tx_broadcast);
FALCON_STAT(efx, GTxLt64Pkt, tx_lt64);
FALCON_STAT(efx, GTx64Pkt, tx_64);
FALCON_STAT(efx, GTx65to127Pkt, tx_65_to_127);
FALCON_STAT(efx, GTx128to255Pkt, tx_128_to_255);
FALCON_STAT(efx, GTx256to511Pkt, tx_256_to_511);
FALCON_STAT(efx, GTx512to1023Pkt, tx_512_to_1023);
FALCON_STAT(efx, GTx1024to15xxPkt, tx_1024_to_15xx);
FALCON_STAT(efx, GTx15xxtoJumboPkt, tx_15xx_to_jumbo);
FALCON_STAT(efx, GTxGtJumboPkt, tx_gtjumbo);
FALCON_STAT(efx, GTxNonTcpUdpPkt, tx_non_tcpudp);
FALCON_STAT(efx, GTxMacSrcErrPkt, tx_mac_src_error);
FALCON_STAT(efx, GTxIpSrcErrPkt, tx_ip_src_error);
/* Pause frames are erroneously counted as errors (SFC bug 3269) */
new_rx_pause = mac_stats->rx_pause;
new_tx_pause = mac_stats->tx_pause;
mac_stats->rx_bad -= (new_rx_pause - old_rx_pause);
mac_stats->tx_bad -= (new_tx_pause - old_tx_pause);
/* Derive stats that the MAC doesn't provide directly */
mac_stats->tx_bad_bytes =
mac_stats->tx_bytes - mac_stats->tx_good_bytes;
mac_stats->tx_packets =
mac_stats->tx_lt64 + mac_stats->tx_64 +
mac_stats->tx_65_to_127 + mac_stats->tx_128_to_255 +
mac_stats->tx_256_to_511 + mac_stats->tx_512_to_1023 +
mac_stats->tx_1024_to_15xx + mac_stats->tx_15xx_to_jumbo +
mac_stats->tx_gtjumbo;
mac_stats->tx_collision =
mac_stats->tx_single_collision +
mac_stats->tx_multiple_collision +
mac_stats->tx_excessive_collision +
mac_stats->tx_late_collision;
mac_stats->rx_bytes =
mac_stats->rx_good_bytes + mac_stats->rx_bad_bytes;
mac_stats->rx_packets =
mac_stats->rx_good_lt64 + mac_stats->rx_bad_lt64 +
mac_stats->rx_64 + mac_stats->rx_65_to_127 +
mac_stats->rx_128_to_255 + mac_stats->rx_256_to_511 +
mac_stats->rx_512_to_1023 + mac_stats->rx_1024_to_15xx +
mac_stats->rx_15xx_to_jumbo + mac_stats->rx_gtjumbo;
mac_stats->rx_good = mac_stats->rx_packets - mac_stats->rx_bad;
mac_stats->rx_lt64 = mac_stats->rx_good_lt64 + mac_stats->rx_bad_lt64;
}
static bool falcon_gmac_check_fault(struct efx_nic *efx)
{
return false;
}
struct efx_mac_operations falcon_gmac_operations = {
.reconfigure = falcon_reconfigure_gmac,
.update_stats = falcon_update_stats_gmac,
.check_fault = falcon_gmac_check_fault,
};
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