drivers/net/sfc/falcon_gmac.c

   1 /****************************************************************************
   2  * Driver for Solarflare Solarstorm network controllers and boards
   3  * Copyright 2005-2006 Fen Systems Ltd.
   4  * Copyright 2006-2008 Solarflare Communications Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published
   8  * by the Free Software Foundation, incorporated herein by reference.
   9  */
  10
  11 #include <linux/delay.h>
  12 #include "net_driver.h"
  13 #include "efx.h"
  14 #include "falcon.h"
  15 #include "mac.h"
  16 #include "falcon_hwdefs.h"
  17 #include "falcon_io.h"
  18 #include "gmii.h"
  19
  20 /**************************************************************************
  21  *
  22  * MAC operations
  23  *
  24  *************************************************************************/
  25
  26 static void falcon_reconfigure_gmac(struct efx_nic *efx)
  27 {
  28         bool loopback, tx_fc, rx_fc, bytemode;
  29         int if_mode;
  30         unsigned int max_frame_len;
  31         efx_oword_t reg;
  32
  33         /* Configuration register 1 */
  34         tx_fc = (efx->link_fc & EFX_FC_TX) || !efx->link_fd;
  35         rx_fc = !!(efx->link_fc & EFX_FC_RX);
  36         loopback = (efx->loopback_mode == LOOPBACK_GMAC);
  37         bytemode = (efx->link_speed == 1000);
  38
  39         EFX_POPULATE_OWORD_5(reg,
  40                              GM_LOOP, loopback,
  41                              GM_TX_EN, 1,
  42                              GM_TX_FC_EN, tx_fc,
  43                              GM_RX_EN, 1,
  44                              GM_RX_FC_EN, rx_fc);
  45         falcon_write(efx, &reg, GM_CFG1_REG);
  46         udelay(10);
  47
  48         /* Configuration register 2 */
  49         if_mode = (bytemode) ? 2 : 1;
  50         EFX_POPULATE_OWORD_5(reg,
  51                              GM_IF_MODE, if_mode,
  52                              GM_PAD_CRC_EN, 1,
  53                              GM_LEN_CHK, 1,
  54                              GM_FD, efx->link_fd,
  55                              GM_PAMBL_LEN, 0x7/*datasheet recommended */);
  56
  57         falcon_write(efx, &reg, GM_CFG2_REG);
  58         udelay(10);
  59
  60         /* Max frame len register */
  61         max_frame_len = EFX_MAX_FRAME_LEN(efx->net_dev->mtu);
  62         EFX_POPULATE_OWORD_1(reg, GM_MAX_FLEN, max_frame_len);
  63         falcon_write(efx, &reg, GM_MAX_FLEN_REG);
  64         udelay(10);
  65
  66         /* FIFO configuration register 0 */
  67         EFX_POPULATE_OWORD_5(reg,
  68                              GMF_FTFENREQ, 1,
  69                              GMF_STFENREQ, 1,
  70                              GMF_FRFENREQ, 1,
  71                              GMF_SRFENREQ, 1,
  72                              GMF_WTMENREQ, 1);
  73         falcon_write(efx, &reg, GMF_CFG0_REG);
  74         udelay(10);
  75
  76         /* FIFO configuration register 1 */
  77         EFX_POPULATE_OWORD_2(reg,
  78                              GMF_CFGFRTH, 0x12,
  79                              GMF_CFGXOFFRTX, 0xffff);
  80         falcon_write(efx, &reg, GMF_CFG1_REG);
  81         udelay(10);
  82
  83         /* FIFO configuration register 2 */
  84         EFX_POPULATE_OWORD_2(reg,
  85                              GMF_CFGHWM, 0x3f,
  86                              GMF_CFGLWM, 0xa);
  87         falcon_write(efx, &reg, GMF_CFG2_REG);
  88         udelay(10);
  89
  90         /* FIFO configuration register 3 */
  91         EFX_POPULATE_OWORD_2(reg,
  92                              GMF_CFGHWMFT, 0x1c,
  93                              GMF_CFGFTTH, 0x08);
  94         falcon_write(efx, &reg, GMF_CFG3_REG);
  95         udelay(10);
  96
  97         /* FIFO configuration register 4 */
  98         EFX_POPULATE_OWORD_1(reg, GMF_HSTFLTRFRM_PAUSE, 1);
  99         falcon_write(efx, &reg, GMF_CFG4_REG);
 100         udelay(10);
 101
 102         /* FIFO configuration register 5 */
 103         falcon_read(efx, &reg, GMF_CFG5_REG);
 104         EFX_SET_OWORD_FIELD(reg, GMF_CFGBYTMODE, bytemode);
 105         EFX_SET_OWORD_FIELD(reg, GMF_CFGHDPLX, !efx->link_fd);
 106         EFX_SET_OWORD_FIELD(reg, GMF_HSTDRPLT64, !efx->link_fd);
 107         EFX_SET_OWORD_FIELD(reg, GMF_HSTFLTRFRMDC_PAUSE, 0);
 108         falcon_write(efx, &reg, GMF_CFG5_REG);
 109         udelay(10);
 110
 111         /* MAC address */
 112         EFX_POPULATE_OWORD_4(reg,
 113                              GM_HWADDR_5, efx->net_dev->dev_addr[5],
 114                              GM_HWADDR_4, efx->net_dev->dev_addr[4],
 115                              GM_HWADDR_3, efx->net_dev->dev_addr[3],
 116                              GM_HWADDR_2, efx->net_dev->dev_addr[2]);
 117         falcon_write(efx, &reg, GM_ADR1_REG);
 118         udelay(10);
 119         EFX_POPULATE_OWORD_2(reg,
 120                              GM_HWADDR_1, efx->net_dev->dev_addr[1],
 121                              GM_HWADDR_0, efx->net_dev->dev_addr[0]);
 122         falcon_write(efx, &reg, GM_ADR2_REG);
 123         udelay(10);
 124
 125         falcon_reconfigure_mac_wrapper(efx);
 126 }
 127
 128 static void falcon_update_stats_gmac(struct efx_nic *efx)
 129 {
 130         struct efx_mac_stats *mac_stats = &efx->mac_stats;
 131         unsigned long old_rx_pause, old_tx_pause;
 132         unsigned long new_rx_pause, new_tx_pause;
 133         int rc;
 134
 135         rc = falcon_dma_stats(efx, GDmaDone_offset);
 136         if (rc)
 137                 return;
 138
 139         /* Pause frames are erroneously counted as errors (SFC bug 3269) */
 140         old_rx_pause = mac_stats->rx_pause;
 141         old_tx_pause = mac_stats->tx_pause;
 142
 143         /* Update MAC stats from DMAed values */
 144         FALCON_STAT(efx, GRxGoodOct, rx_good_bytes);
 145         FALCON_STAT(efx, GRxBadOct, rx_bad_bytes);
 146         FALCON_STAT(efx, GRxMissPkt, rx_missed);
 147         FALCON_STAT(efx, GRxFalseCRS, rx_false_carrier);
 148         FALCON_STAT(efx, GRxPausePkt, rx_pause);
 149         FALCON_STAT(efx, GRxBadPkt, rx_bad);
 150         FALCON_STAT(efx, GRxUcastPkt, rx_unicast);
 151         FALCON_STAT(efx, GRxMcastPkt, rx_multicast);
 152         FALCON_STAT(efx, GRxBcastPkt, rx_broadcast);
 153         FALCON_STAT(efx, GRxGoodLt64Pkt, rx_good_lt64);
 154         FALCON_STAT(efx, GRxBadLt64Pkt, rx_bad_lt64);
 155         FALCON_STAT(efx, GRx64Pkt, rx_64);
 156         FALCON_STAT(efx, GRx65to127Pkt, rx_65_to_127);
 157         FALCON_STAT(efx, GRx128to255Pkt, rx_128_to_255);
 158         FALCON_STAT(efx, GRx256to511Pkt, rx_256_to_511);
 159         FALCON_STAT(efx, GRx512to1023Pkt, rx_512_to_1023);
 160         FALCON_STAT(efx, GRx1024to15xxPkt, rx_1024_to_15xx);
 161         FALCON_STAT(efx, GRx15xxtoJumboPkt, rx_15xx_to_jumbo);
 162         FALCON_STAT(efx, GRxGtJumboPkt, rx_gtjumbo);
 163         FALCON_STAT(efx, GRxFcsErr64to15xxPkt, rx_bad_64_to_15xx);
 164         FALCON_STAT(efx, GRxFcsErr15xxtoJumboPkt, rx_bad_15xx_to_jumbo);
 165         FALCON_STAT(efx, GRxFcsErrGtJumboPkt, rx_bad_gtjumbo);
 166         FALCON_STAT(efx, GTxGoodBadOct, tx_bytes);
 167         FALCON_STAT(efx, GTxGoodOct, tx_good_bytes);
 168         FALCON_STAT(efx, GTxSglColPkt, tx_single_collision);
 169         FALCON_STAT(efx, GTxMultColPkt, tx_multiple_collision);
 170         FALCON_STAT(efx, GTxExColPkt, tx_excessive_collision);
 171         FALCON_STAT(efx, GTxDefPkt, tx_deferred);
 172         FALCON_STAT(efx, GTxLateCol, tx_late_collision);
 173         FALCON_STAT(efx, GTxExDefPkt, tx_excessive_deferred);
 174         FALCON_STAT(efx, GTxPausePkt, tx_pause);
 175         FALCON_STAT(efx, GTxBadPkt, tx_bad);
 176         FALCON_STAT(efx, GTxUcastPkt, tx_unicast);
 177         FALCON_STAT(efx, GTxMcastPkt, tx_multicast);
 178         FALCON_STAT(efx, GTxBcastPkt, tx_broadcast);
 179         FALCON_STAT(efx, GTxLt64Pkt, tx_lt64);
 180         FALCON_STAT(efx, GTx64Pkt, tx_64);
 181         FALCON_STAT(efx, GTx65to127Pkt, tx_65_to_127);
 182         FALCON_STAT(efx, GTx128to255Pkt, tx_128_to_255);
 183         FALCON_STAT(efx, GTx256to511Pkt, tx_256_to_511);
 184         FALCON_STAT(efx, GTx512to1023Pkt, tx_512_to_1023);
 185         FALCON_STAT(efx, GTx1024to15xxPkt, tx_1024_to_15xx);
 186         FALCON_STAT(efx, GTx15xxtoJumboPkt, tx_15xx_to_jumbo);
 187         FALCON_STAT(efx, GTxGtJumboPkt, tx_gtjumbo);
 188         FALCON_STAT(efx, GTxNonTcpUdpPkt, tx_non_tcpudp);
 189         FALCON_STAT(efx, GTxMacSrcErrPkt, tx_mac_src_error);
 190         FALCON_STAT(efx, GTxIpSrcErrPkt, tx_ip_src_error);
 191
 192         /* Pause frames are erroneously counted as errors (SFC bug 3269) */
 193         new_rx_pause = mac_stats->rx_pause;
 194         new_tx_pause = mac_stats->tx_pause;
 195         mac_stats->rx_bad -= (new_rx_pause - old_rx_pause);
 196         mac_stats->tx_bad -= (new_tx_pause - old_tx_pause);
 197
 198         /* Derive stats that the MAC doesn't provide directly */
 199         mac_stats->tx_bad_bytes =
 200                 mac_stats->tx_bytes - mac_stats->tx_good_bytes;
 201         mac_stats->tx_packets =
 202                 mac_stats->tx_lt64 + mac_stats->tx_64 +
 203                 mac_stats->tx_65_to_127 + mac_stats->tx_128_to_255 +
 204                 mac_stats->tx_256_to_511 + mac_stats->tx_512_to_1023 +
 205                 mac_stats->tx_1024_to_15xx + mac_stats->tx_15xx_to_jumbo +
 206                 mac_stats->tx_gtjumbo;
 207         mac_stats->tx_collision =
 208                 mac_stats->tx_single_collision +
 209                 mac_stats->tx_multiple_collision +
 210                 mac_stats->tx_excessive_collision +
 211                 mac_stats->tx_late_collision;
 212         mac_stats->rx_bytes =
 213                 mac_stats->rx_good_bytes + mac_stats->rx_bad_bytes;
 214         mac_stats->rx_packets =
 215                 mac_stats->rx_good_lt64 + mac_stats->rx_bad_lt64 +
 216                 mac_stats->rx_64 + mac_stats->rx_65_to_127 +
 217                 mac_stats->rx_128_to_255 + mac_stats->rx_256_to_511 +
 218                 mac_stats->rx_512_to_1023 + mac_stats->rx_1024_to_15xx +
 219                 mac_stats->rx_15xx_to_jumbo + mac_stats->rx_gtjumbo;
 220         mac_stats->rx_good = mac_stats->rx_packets - mac_stats->rx_bad;
 221         mac_stats->rx_lt64 = mac_stats->rx_good_lt64 + mac_stats->rx_bad_lt64;
 222 }
 223
 224 struct efx_mac_operations falcon_gmac_operations = {
 225         .reconfigure    = falcon_reconfigure_gmac,
 226         .update_stats   = falcon_update_stats_gmac,
 227         .irq            = efx_port_dummy_op_void,
 228         .poll           = efx_port_dummy_op_void,
 229 };