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alistair23-linux/drivers/net/sfc/falcon_gmac.c
Ben Hutchings 766ca0fa6b sfc: Rework MAC, PHY and board event handling 
From: Steve Hodgson <shodgson@solarflare.com>

MAC, PHY and board events may be separately enabled and signalled.
Our current arrangement of chaining the polling functions can result
in events being missed.  Change them to be more independent.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-12-12 21:59:24 -08:00

230 lines
7.8 KiB
C
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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 "falcon_hwdefs.h"
#include "falcon_io.h"
#include "gmii.h"
/**************************************************************************
*
* MAC operations
*
*************************************************************************/
static void falcon_reconfigure_gmac(struct efx_nic *efx)
{
bool loopback, tx_fc, rx_fc, bytemode;
int if_mode;
unsigned int max_frame_len;
efx_oword_t reg;
/* Configuration register 1 */
tx_fc = (efx->link_fc & EFX_FC_TX) || !efx->link_fd;
rx_fc = !!(efx->link_fc & EFX_FC_RX);
loopback = (efx->loopback_mode == LOOPBACK_GMAC);
bytemode = (efx->link_speed == 1000);
EFX_POPULATE_OWORD_5(reg,
GM_LOOP, loopback,
GM_TX_EN, 1,
GM_TX_FC_EN, tx_fc,
GM_RX_EN, 1,
GM_RX_FC_EN, rx_fc);
falcon_write(efx, &reg, GM_CFG1_REG);
udelay(10);
/* Configuration register 2 */
if_mode = (bytemode) ? 2 : 1;
EFX_POPULATE_OWORD_5(reg,
GM_IF_MODE, if_mode,
GM_PAD_CRC_EN, 1,
GM_LEN_CHK, 1,
GM_FD, efx->link_fd,
GM_PAMBL_LEN, 0x7/*datasheet recommended */);
falcon_write(efx, &reg, GM_CFG2_REG);
udelay(10);
/* Max frame len register */
max_frame_len = EFX_MAX_FRAME_LEN(efx->net_dev->mtu);
EFX_POPULATE_OWORD_1(reg, GM_MAX_FLEN, max_frame_len);
falcon_write(efx, &reg, GM_MAX_FLEN_REG);
udelay(10);
/* FIFO configuration register 0 */
EFX_POPULATE_OWORD_5(reg,
GMF_FTFENREQ, 1,
GMF_STFENREQ, 1,
GMF_FRFENREQ, 1,
GMF_SRFENREQ, 1,
GMF_WTMENREQ, 1);
falcon_write(efx, &reg, GMF_CFG0_REG);
udelay(10);
/* FIFO configuration register 1 */
EFX_POPULATE_OWORD_2(reg,
GMF_CFGFRTH, 0x12,
GMF_CFGXOFFRTX, 0xffff);
falcon_write(efx, &reg, GMF_CFG1_REG);
udelay(10);
/* FIFO configuration register 2 */
EFX_POPULATE_OWORD_2(reg,
GMF_CFGHWM, 0x3f,
GMF_CFGLWM, 0xa);
falcon_write(efx, &reg, GMF_CFG2_REG);
udelay(10);
/* FIFO configuration register 3 */
EFX_POPULATE_OWORD_2(reg,
GMF_CFGHWMFT, 0x1c,
GMF_CFGFTTH, 0x08);
falcon_write(efx, &reg, GMF_CFG3_REG);
udelay(10);
/* FIFO configuration register 4 */
EFX_POPULATE_OWORD_1(reg, GMF_HSTFLTRFRM_PAUSE, 1);
falcon_write(efx, &reg, GMF_CFG4_REG);
udelay(10);
/* FIFO configuration register 5 */
falcon_read(efx, &reg, GMF_CFG5_REG);
EFX_SET_OWORD_FIELD(reg, GMF_CFGBYTMODE, bytemode);
EFX_SET_OWORD_FIELD(reg, GMF_CFGHDPLX, !efx->link_fd);
EFX_SET_OWORD_FIELD(reg, GMF_HSTDRPLT64, !efx->link_fd);
EFX_SET_OWORD_FIELD(reg, GMF_HSTFLTRFRMDC_PAUSE, 0);
falcon_write(efx, &reg, GMF_CFG5_REG);
udelay(10);
/* MAC address */
EFX_POPULATE_OWORD_4(reg,
GM_HWADDR_5, efx->net_dev->dev_addr[5],
GM_HWADDR_4, efx->net_dev->dev_addr[4],
GM_HWADDR_3, efx->net_dev->dev_addr[3],
GM_HWADDR_2, efx->net_dev->dev_addr[2]);
falcon_write(efx, &reg, GM_ADR1_REG);
udelay(10);
EFX_POPULATE_OWORD_2(reg,
GM_HWADDR_1, efx->net_dev->dev_addr[1],
GM_HWADDR_0, efx->net_dev->dev_addr[0]);
falcon_write(efx, &reg, GM_ADR2_REG);
udelay(10);
falcon_reconfigure_mac_wrapper(efx);
}
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;
int rc;
rc = falcon_dma_stats(efx, GDmaDone_offset);
if (rc)
return;
/* 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;
}
struct efx_mac_operations falcon_gmac_operations = {
.reconfigure = falcon_reconfigure_gmac,
.update_stats = falcon_update_stats_gmac,
.irq = efx_port_dummy_op_void,
.poll = efx_port_dummy_op_void,
};
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