drivers/staging/octeon/ethernet-common.c

   1 /**********************************************************************
   2  * Author: Cavium Networks
   3  *
   4  * Contact: support@caviumnetworks.com
   5  * This file is part of the OCTEON SDK
   6  *
   7  * Copyright (c) 2003-2007 Cavium Networks
   8  *
   9  * This file is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License, Version 2, as
  11  * published by the Free Software Foundation.
  12  *
  13  * This file is distributed in the hope that it will be useful, but
  14  * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
  15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
  16  * NONINFRINGEMENT.  See the GNU General Public License for more
  17  * details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this file; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  22  * or visit http://www.gnu.org/licenses/.
  23  *
  24  * This file may also be available under a different license from Cavium.
  25  * Contact Cavium Networks for more information
  26 **********************************************************************/
  27 #include <linux/kernel.h>
  28 #include <linux/mii.h>
  29 #include <net/dst.h>
  30
  31 #include <asm/atomic.h>
  32 #include <asm/octeon/octeon.h>
  33
  34 #include "ethernet-defines.h"
  35 #include "ethernet-tx.h"
  36 #include "ethernet-mdio.h"
  37 #include "ethernet-util.h"
  38 #include "octeon-ethernet.h"
  39 #include "ethernet-common.h"
  40
  41 #include "cvmx-pip.h"
  42 #include "cvmx-pko.h"
  43 #include "cvmx-fau.h"
  44 #include "cvmx-helper.h"
  45
  46 #include "cvmx-gmxx-defs.h"
  47
  48 /**
  49  * Get the low level ethernet statistics
  50  *
  51  * @dev:    Device to get the statistics from
  52  * Returns Pointer to the statistics
  53  */
  54 static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
  55 {
  56         cvmx_pip_port_status_t rx_status;
  57         cvmx_pko_port_status_t tx_status;
  58         struct octeon_ethernet *priv = netdev_priv(dev);
  59
  60         if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
  61                 if (octeon_is_simulation()) {
  62                         /* The simulator doesn't support statistics */
  63                         memset(&rx_status, 0, sizeof(rx_status));
  64                         memset(&tx_status, 0, sizeof(tx_status));
  65                 } else {
  66                         cvmx_pip_get_port_status(priv->port, 1, &rx_status);
  67                         cvmx_pko_get_port_status(priv->port, 1, &tx_status);
  68                 }
  69
  70                 priv->stats.rx_packets += rx_status.inb_packets;
  71                 priv->stats.tx_packets += tx_status.packets;
  72                 priv->stats.rx_bytes += rx_status.inb_octets;
  73                 priv->stats.tx_bytes += tx_status.octets;
  74                 priv->stats.multicast += rx_status.multicast_packets;
  75                 priv->stats.rx_crc_errors += rx_status.inb_errors;
  76                 priv->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
  77
  78                 /*
  79                  * The drop counter must be incremented atomically
  80                  * since the RX tasklet also increments it.
  81                  */
  82 #ifdef CONFIG_64BIT
  83                 atomic64_add(rx_status.dropped_packets,
  84                              (atomic64_t *)&priv->stats.rx_dropped);
  85 #else
  86                 atomic_add(rx_status.dropped_packets,
  87                              (atomic_t *)&priv->stats.rx_dropped);
  88 #endif
  89         }
  90
  91         return &priv->stats;
  92 }
  93
  94 /**
  95  * Set the multicast list. Currently unimplemented.
  96  *
  97  * @dev:    Device to work on
  98  */
  99 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
 100 {
 101         union cvmx_gmxx_prtx_cfg gmx_cfg;
 102         struct octeon_ethernet *priv = netdev_priv(dev);
 103         int interface = INTERFACE(priv->port);
 104         int index = INDEX(priv->port);
 105
 106         if ((interface < 2)
 107             && (cvmx_helper_interface_get_mode(interface) !=
 108                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 109                 union cvmx_gmxx_rxx_adr_ctl control;
 110                 control.u64 = 0;
 111                 control.s.bcst = 1;     /* Allow broadcast MAC addresses */
 112
 113                 if (dev->mc_list || (dev->flags & IFF_ALLMULTI) ||
 114                     (dev->flags & IFF_PROMISC))
 115                         /* Force accept multicast packets */
 116                         control.s.mcst = 2;
 117                 else
 118                         /* Force reject multicat packets */
 119                         control.s.mcst = 1;
 120
 121                 if (dev->flags & IFF_PROMISC)
 122                         /*
 123                          * Reject matches if promisc. Since CAM is
 124                          * shut off, should accept everything.
 125                          */
 126                         control.s.cam_mode = 0;
 127                 else
 128                         /* Filter packets based on the CAM */
 129                         control.s.cam_mode = 1;
 130
 131                 gmx_cfg.u64 =
 132                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 133                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 134                                gmx_cfg.u64 & ~1ull);
 135
 136                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
 137                                control.u64);
 138                 if (dev->flags & IFF_PROMISC)
 139                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 140                                        (index, interface), 0);
 141                 else
 142                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 143                                        (index, interface), 1);
 144
 145                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 146                                gmx_cfg.u64);
 147         }
 148 }
 149
 150 /**
 151  * Set the hardware MAC address for a device
 152  *
 153  * @dev:    Device to change the MAC address for
 154  * @addr:   Address structure to change it too. MAC address is addr + 2.
 155  * Returns Zero on success
 156  */
 157 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
 158 {
 159         struct octeon_ethernet *priv = netdev_priv(dev);
 160         union cvmx_gmxx_prtx_cfg gmx_cfg;
 161         int interface = INTERFACE(priv->port);
 162         int index = INDEX(priv->port);
 163
 164         memcpy(dev->dev_addr, addr + 2, 6);
 165
 166         if ((interface < 2)
 167             && (cvmx_helper_interface_get_mode(interface) !=
 168                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 169                 int i;
 170                 uint8_t *ptr = addr;
 171                 uint64_t mac = 0;
 172                 for (i = 0; i < 6; i++)
 173                         mac = (mac << 8) | (uint64_t) (ptr[i + 2]);
 174
 175                 gmx_cfg.u64 =
 176                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 177                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 178                                gmx_cfg.u64 & ~1ull);
 179
 180                 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
 181                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
 182                                ptr[2]);
 183                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
 184                                ptr[3]);
 185                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
 186                                ptr[4]);
 187                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
 188                                ptr[5]);
 189                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
 190                                ptr[6]);
 191                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
 192                                ptr[7]);
 193                 cvm_oct_common_set_multicast_list(dev);
 194                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 195                                gmx_cfg.u64);
 196         }
 197         return 0;
 198 }
 199
 200 /**
 201  * Change the link MTU. Unimplemented
 202  *
 203  * @dev:     Device to change
 204  * @new_mtu: The new MTU
 205  *
 206  * Returns Zero on success
 207  */
 208 static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
 209 {
 210         struct octeon_ethernet *priv = netdev_priv(dev);
 211         int interface = INTERFACE(priv->port);
 212         int index = INDEX(priv->port);
 213 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
 214         int vlan_bytes = 4;
 215 #else
 216         int vlan_bytes = 0;
 217 #endif
 218
 219         /*
 220          * Limit the MTU to make sure the ethernet packets are between
 221          * 64 bytes and 65535 bytes.
 222          */
 223         if ((new_mtu + 14 + 4 + vlan_bytes < 64)
 224             || (new_mtu + 14 + 4 + vlan_bytes > 65392)) {
 225                 pr_err("MTU must be between %d and %d.\n",
 226                        64 - 14 - 4 - vlan_bytes, 65392 - 14 - 4 - vlan_bytes);
 227                 return -EINVAL;
 228         }
 229         dev->mtu = new_mtu;
 230
 231         if ((interface < 2)
 232             && (cvmx_helper_interface_get_mode(interface) !=
 233                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 234                 /* Add ethernet header and FCS, and VLAN if configured. */
 235                 int max_packet = new_mtu + 14 + 4 + vlan_bytes;
 236
 237                 if (OCTEON_IS_MODEL(OCTEON_CN3XXX)
 238                     || OCTEON_IS_MODEL(OCTEON_CN58XX)) {
 239                         /* Signal errors on packets larger than the MTU */
 240                         cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
 241                                        max_packet);
 242                 } else {
 243                         /*
 244                          * Set the hardware to truncate packets larger
 245                          * than the MTU and smaller the 64 bytes.
 246                          */
 247                         union cvmx_pip_frm_len_chkx frm_len_chk;
 248                         frm_len_chk.u64 = 0;
 249                         frm_len_chk.s.minlen = 64;
 250                         frm_len_chk.s.maxlen = max_packet;
 251                         cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
 252                                        frm_len_chk.u64);
 253                 }
 254                 /*
 255                  * Set the hardware to truncate packets larger than
 256                  * the MTU. The jabber register must be set to a
 257                  * multiple of 8 bytes, so round up.
 258                  */
 259                 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
 260                                (max_packet + 7) & ~7u);
 261         }
 262         return 0;
 263 }
 264
 265 /**
 266  * Per network device initialization
 267  *
 268  * @dev:    Device to initialize
 269  * Returns Zero on success
 270  */
 271 int cvm_oct_common_init(struct net_device *dev)
 272 {
 273         static int count;
 274         char mac[8] = { 0x00, 0x00,
 275                 octeon_bootinfo->mac_addr_base[0],
 276                 octeon_bootinfo->mac_addr_base[1],
 277                 octeon_bootinfo->mac_addr_base[2],
 278                 octeon_bootinfo->mac_addr_base[3],
 279                 octeon_bootinfo->mac_addr_base[4],
 280                 octeon_bootinfo->mac_addr_base[5] + count
 281         };
 282         struct octeon_ethernet *priv = netdev_priv(dev);
 283
 284         /*
 285          * Force the interface to use the POW send if always_use_pow
 286          * was specified or it is in the pow send list.
 287          */
 288         if ((pow_send_group != -1)
 289             && (always_use_pow || strstr(pow_send_list, dev->name)))
 290                 priv->queue = -1;
 291
 292         if (priv->queue != -1) {
 293                 dev->hard_start_xmit = cvm_oct_xmit;
 294                 if (USE_HW_TCPUDP_CHECKSUM)
 295                         dev->features |= NETIF_F_IP_CSUM;
 296         } else
 297                 dev->hard_start_xmit = cvm_oct_xmit_pow;
 298         count++;
 299
 300         dev->get_stats = cvm_oct_common_get_stats;
 301         dev->set_mac_address = cvm_oct_common_set_mac_address;
 302         dev->set_multicast_list = cvm_oct_common_set_multicast_list;
 303         dev->change_mtu = cvm_oct_common_change_mtu;
 304         dev->do_ioctl = cvm_oct_ioctl;
 305         /* We do our own locking, Linux doesn't need to */
 306         dev->features |= NETIF_F_LLTX;
 307         SET_ETHTOOL_OPS(dev, &cvm_oct_ethtool_ops);
 308 #ifdef CONFIG_NET_POLL_CONTROLLER
 309         dev->poll_controller = cvm_oct_poll_controller;
 310 #endif
 311
 312         cvm_oct_mdio_setup_device(dev);
 313         dev->set_mac_address(dev, mac);
 314         dev->change_mtu(dev, dev->mtu);
 315
 316         /*
 317          * Zero out stats for port so we won't mistakenly show
 318          * counters from the bootloader.
 319          */
 320         memset(dev->get_stats(dev), 0, sizeof(struct net_device_stats));
 321
 322         return 0;
 323 }
 324
 325 void cvm_oct_common_uninit(struct net_device *dev)
 326 {
 327         /* Currently nothing to do */
 328 }