drivers/net/ethernet/broadcom/bcmsysport.c

   1 /*
   2  * Broadcom BCM7xxx System Port Ethernet MAC driver
   3  *
   4  * Copyright (C) 2014 Broadcom Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #define pr_fmt(fmt)     KBUILD_MODNAME ": " fmt
  12
  13 #include <linux/init.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/module.h>
  16 #include <linux/kernel.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/of.h>
  21 #include <linux/of_net.h>
  22 #include <linux/of_mdio.h>
  23 #include <linux/phy.h>
  24 #include <linux/phy_fixed.h>
  25 #include <net/dsa.h>
  26 #include <net/ip.h>
  27 #include <net/ipv6.h>
  28
  29 #include "bcmsysport.h"
  30
  31 /* I/O accessors register helpers */
  32 #define BCM_SYSPORT_IO_MACRO(name, offset) \
  33 static inline u32 name##_readl(struct bcm_sysport_priv *priv, u32 off)  \
  34 {                                                                       \
  35         u32 reg = __raw_readl(priv->base + offset + off);               \
  36         return reg;                                                     \
  37 }                                                                       \
  38 static inline void name##_writel(struct bcm_sysport_priv *priv,         \
  39                                   u32 val, u32 off)                     \
  40 {                                                                       \
  41         __raw_writel(val, priv->base + offset + off);                   \
  42 }                                                                       \
  43
  44 BCM_SYSPORT_IO_MACRO(intrl2_0, SYS_PORT_INTRL2_0_OFFSET);
  45 BCM_SYSPORT_IO_MACRO(intrl2_1, SYS_PORT_INTRL2_1_OFFSET);
  46 BCM_SYSPORT_IO_MACRO(umac, SYS_PORT_UMAC_OFFSET);
  47 BCM_SYSPORT_IO_MACRO(gib, SYS_PORT_GIB_OFFSET);
  48 BCM_SYSPORT_IO_MACRO(tdma, SYS_PORT_TDMA_OFFSET);
  49 BCM_SYSPORT_IO_MACRO(rxchk, SYS_PORT_RXCHK_OFFSET);
  50 BCM_SYSPORT_IO_MACRO(txchk, SYS_PORT_TXCHK_OFFSET);
  51 BCM_SYSPORT_IO_MACRO(rbuf, SYS_PORT_RBUF_OFFSET);
  52 BCM_SYSPORT_IO_MACRO(tbuf, SYS_PORT_TBUF_OFFSET);
  53 BCM_SYSPORT_IO_MACRO(topctrl, SYS_PORT_TOPCTRL_OFFSET);
  54
  55 /* On SYSTEMPORT Lite, any register after RDMA_STATUS has the exact
  56  * same layout, except it has been moved by 4 bytes up, *sigh*
  57  */
  58 static inline u32 rdma_readl(struct bcm_sysport_priv *priv, u32 off)
  59 {
  60         if (priv->is_lite && off >= RDMA_STATUS)
  61                 off += 4;
  62         return __raw_readl(priv->base + SYS_PORT_RDMA_OFFSET + off);
  63 }
  64
  65 static inline void rdma_writel(struct bcm_sysport_priv *priv, u32 val, u32 off)
  66 {
  67         if (priv->is_lite && off >= RDMA_STATUS)
  68                 off += 4;
  69         __raw_writel(val, priv->base + SYS_PORT_RDMA_OFFSET + off);
  70 }
  71
  72 static inline u32 tdma_control_bit(struct bcm_sysport_priv *priv, u32 bit)
  73 {
  74         if (!priv->is_lite) {
  75                 return BIT(bit);
  76         } else {
  77                 if (bit >= ACB_ALGO)
  78                         return BIT(bit + 1);
  79                 else
  80                         return BIT(bit);
  81         }
  82 }
  83
  84 /* L2-interrupt masking/unmasking helpers, does automatic saving of the applied
  85  * mask in a software copy to avoid CPU_MASK_STATUS reads in hot-paths.
  86   */
  87 #define BCM_SYSPORT_INTR_L2(which)      \
  88 static inline void intrl2_##which##_mask_clear(struct bcm_sysport_priv *priv, \
  89                                                 u32 mask)               \
  90 {                                                                       \
  91         priv->irq##which##_mask &= ~(mask);                             \
  92         intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR);     \
  93 }                                                                       \
  94 static inline void intrl2_##which##_mask_set(struct bcm_sysport_priv *priv, \
  95                                                 u32 mask)               \
  96 {                                                                       \
  97         intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET);      \
  98         priv->irq##which##_mask |= (mask);                              \
  99 }                                                                       \
 100
 101 BCM_SYSPORT_INTR_L2(0)
 102 BCM_SYSPORT_INTR_L2(1)
 103
 104 /* Register accesses to GISB/RBUS registers are expensive (few hundred
 105  * nanoseconds), so keep the check for 64-bits explicit here to save
 106  * one register write per-packet on 32-bits platforms.
 107  */
 108 static inline void dma_desc_set_addr(struct bcm_sysport_priv *priv,
 109                                      void __iomem *d,
 110                                      dma_addr_t addr)
 111 {
 112 #ifdef CONFIG_PHYS_ADDR_T_64BIT
 113         __raw_writel(upper_32_bits(addr) & DESC_ADDR_HI_MASK,
 114                      d + DESC_ADDR_HI_STATUS_LEN);
 115 #endif
 116         __raw_writel(lower_32_bits(addr), d + DESC_ADDR_LO);
 117 }
 118
 119 static inline void tdma_port_write_desc_addr(struct bcm_sysport_priv *priv,
 120                                              struct dma_desc *desc,
 121                                              unsigned int port)
 122 {
 123         /* Ports are latched, so write upper address first */
 124         tdma_writel(priv, desc->addr_status_len, TDMA_WRITE_PORT_HI(port));
 125         tdma_writel(priv, desc->addr_lo, TDMA_WRITE_PORT_LO(port));
 126 }
 127
 128 /* Ethtool operations */
 129 static int bcm_sysport_set_rx_csum(struct net_device *dev,
 130                                    netdev_features_t wanted)
 131 {
 132         struct bcm_sysport_priv *priv = netdev_priv(dev);
 133         u32 reg;
 134
 135         priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM);
 136         reg = rxchk_readl(priv, RXCHK_CONTROL);
 137         if (priv->rx_chk_en)
 138                 reg |= RXCHK_EN;
 139         else
 140                 reg &= ~RXCHK_EN;
 141
 142         /* If UniMAC forwards CRC, we need to skip over it to get
 143          * a valid CHK bit to be set in the per-packet status word
 144          */
 145         if (priv->rx_chk_en && priv->crc_fwd)
 146                 reg |= RXCHK_SKIP_FCS;
 147         else
 148                 reg &= ~RXCHK_SKIP_FCS;
 149
 150         /* If Broadcom tags are enabled (e.g: using a switch), make
 151          * sure we tell the RXCHK hardware to expect a 4-bytes Broadcom
 152          * tag after the Ethernet MAC Source Address.
 153          */
 154         if (netdev_uses_dsa(dev))
 155                 reg |= RXCHK_BRCM_TAG_EN;
 156         else
 157                 reg &= ~RXCHK_BRCM_TAG_EN;
 158
 159         rxchk_writel(priv, reg, RXCHK_CONTROL);
 160
 161         return 0;
 162 }
 163
 164 static int bcm_sysport_set_tx_csum(struct net_device *dev,
 165                                    netdev_features_t wanted)
 166 {
 167         struct bcm_sysport_priv *priv = netdev_priv(dev);
 168         u32 reg;
 169
 170         /* Hardware transmit checksum requires us to enable the Transmit status
 171          * block prepended to the packet contents
 172          */
 173         priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM));
 174         reg = tdma_readl(priv, TDMA_CONTROL);
 175         if (priv->tsb_en)
 176                 reg |= tdma_control_bit(priv, TSB_EN);
 177         else
 178                 reg &= ~tdma_control_bit(priv, TSB_EN);
 179         tdma_writel(priv, reg, TDMA_CONTROL);
 180
 181         return 0;
 182 }
 183
 184 static int bcm_sysport_set_features(struct net_device *dev,
 185                                     netdev_features_t features)
 186 {
 187         netdev_features_t changed = features ^ dev->features;
 188         netdev_features_t wanted = dev->wanted_features;
 189         int ret = 0;
 190
 191         if (changed & NETIF_F_RXCSUM)
 192                 ret = bcm_sysport_set_rx_csum(dev, wanted);
 193         if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))
 194                 ret = bcm_sysport_set_tx_csum(dev, wanted);
 195
 196         return ret;
 197 }
 198
 199 /* Hardware counters must be kept in sync because the order/offset
 200  * is important here (order in structure declaration = order in hardware)
 201  */
 202 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = {
 203         /* general stats */
 204         STAT_NETDEV(rx_packets),
 205         STAT_NETDEV(tx_packets),
 206         STAT_NETDEV(rx_bytes),
 207         STAT_NETDEV(tx_bytes),
 208         STAT_NETDEV(rx_errors),
 209         STAT_NETDEV(tx_errors),
 210         STAT_NETDEV(rx_dropped),
 211         STAT_NETDEV(tx_dropped),
 212         STAT_NETDEV(multicast),
 213         /* UniMAC RSV counters */
 214         STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
 215         STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
 216         STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
 217         STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
 218         STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
 219         STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
 220         STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
 221         STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
 222         STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
 223         STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
 224         STAT_MIB_RX("rx_pkts", mib.rx.pkt),
 225         STAT_MIB_RX("rx_bytes", mib.rx.bytes),
 226         STAT_MIB_RX("rx_multicast", mib.rx.mca),
 227         STAT_MIB_RX("rx_broadcast", mib.rx.bca),
 228         STAT_MIB_RX("rx_fcs", mib.rx.fcs),
 229         STAT_MIB_RX("rx_control", mib.rx.cf),
 230         STAT_MIB_RX("rx_pause", mib.rx.pf),
 231         STAT_MIB_RX("rx_unknown", mib.rx.uo),
 232         STAT_MIB_RX("rx_align", mib.rx.aln),
 233         STAT_MIB_RX("rx_outrange", mib.rx.flr),
 234         STAT_MIB_RX("rx_code", mib.rx.cde),
 235         STAT_MIB_RX("rx_carrier", mib.rx.fcr),
 236         STAT_MIB_RX("rx_oversize", mib.rx.ovr),
 237         STAT_MIB_RX("rx_jabber", mib.rx.jbr),
 238         STAT_MIB_RX("rx_mtu_err", mib.rx.mtue),
 239         STAT_MIB_RX("rx_good_pkts", mib.rx.pok),
 240         STAT_MIB_RX("rx_unicast", mib.rx.uc),
 241         STAT_MIB_RX("rx_ppp", mib.rx.ppp),
 242         STAT_MIB_RX("rx_crc", mib.rx.rcrc),
 243         /* UniMAC TSV counters */
 244         STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
 245         STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
 246         STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
 247         STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
 248         STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
 249         STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
 250         STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
 251         STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
 252         STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
 253         STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
 254         STAT_MIB_TX("tx_pkts", mib.tx.pkts),
 255         STAT_MIB_TX("tx_multicast", mib.tx.mca),
 256         STAT_MIB_TX("tx_broadcast", mib.tx.bca),
 257         STAT_MIB_TX("tx_pause", mib.tx.pf),
 258         STAT_MIB_TX("tx_control", mib.tx.cf),
 259         STAT_MIB_TX("tx_fcs_err", mib.tx.fcs),
 260         STAT_MIB_TX("tx_oversize", mib.tx.ovr),
 261         STAT_MIB_TX("tx_defer", mib.tx.drf),
 262         STAT_MIB_TX("tx_excess_defer", mib.tx.edf),
 263         STAT_MIB_TX("tx_single_col", mib.tx.scl),
 264         STAT_MIB_TX("tx_multi_col", mib.tx.mcl),
 265         STAT_MIB_TX("tx_late_col", mib.tx.lcl),
 266         STAT_MIB_TX("tx_excess_col", mib.tx.ecl),
 267         STAT_MIB_TX("tx_frags", mib.tx.frg),
 268         STAT_MIB_TX("tx_total_col", mib.tx.ncl),
 269         STAT_MIB_TX("tx_jabber", mib.tx.jbr),
 270         STAT_MIB_TX("tx_bytes", mib.tx.bytes),
 271         STAT_MIB_TX("tx_good_pkts", mib.tx.pok),
 272         STAT_MIB_TX("tx_unicast", mib.tx.uc),
 273         /* UniMAC RUNT counters */
 274         STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
 275         STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
 276         STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
 277         STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
 278         /* RXCHK misc statistics */
 279         STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR),
 280         STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc,
 281                    RXCHK_OTHER_DISC_CNTR),
 282         /* RBUF misc statistics */
 283         STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR),
 284         STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR),
 285         STAT_MIB_SOFT("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
 286         STAT_MIB_SOFT("rx_dma_failed", mib.rx_dma_failed),
 287         STAT_MIB_SOFT("tx_dma_failed", mib.tx_dma_failed),
 288         /* Per TX-queue statistics are dynamically appended */
 289 };
 290
 291 #define BCM_SYSPORT_STATS_LEN   ARRAY_SIZE(bcm_sysport_gstrings_stats)
 292
 293 static void bcm_sysport_get_drvinfo(struct net_device *dev,
 294                                     struct ethtool_drvinfo *info)
 295 {
 296         strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
 297         strlcpy(info->version, "0.1", sizeof(info->version));
 298         strlcpy(info->bus_info, "platform", sizeof(info->bus_info));
 299 }
 300
 301 static u32 bcm_sysport_get_msglvl(struct net_device *dev)
 302 {
 303         struct bcm_sysport_priv *priv = netdev_priv(dev);
 304
 305         return priv->msg_enable;
 306 }
 307
 308 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
 309 {
 310         struct bcm_sysport_priv *priv = netdev_priv(dev);
 311
 312         priv->msg_enable = enable;
 313 }
 314
 315 static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type)
 316 {
 317         switch (type) {
 318         case BCM_SYSPORT_STAT_NETDEV:
 319         case BCM_SYSPORT_STAT_RXCHK:
 320         case BCM_SYSPORT_STAT_RBUF:
 321         case BCM_SYSPORT_STAT_SOFT:
 322                 return true;
 323         default:
 324                 return false;
 325         }
 326 }
 327
 328 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set)
 329 {
 330         struct bcm_sysport_priv *priv = netdev_priv(dev);
 331         const struct bcm_sysport_stats *s;
 332         unsigned int i, j;
 333
 334         switch (string_set) {
 335         case ETH_SS_STATS:
 336                 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 337                         s = &bcm_sysport_gstrings_stats[i];
 338                         if (priv->is_lite &&
 339                             !bcm_sysport_lite_stat_valid(s->type))
 340                                 continue;
 341                         j++;
 342                 }
 343                 /* Include per-queue statistics */
 344                 return j + dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
 345         default:
 346                 return -EOPNOTSUPP;
 347         }
 348 }
 349
 350 static void bcm_sysport_get_strings(struct net_device *dev,
 351                                     u32 stringset, u8 *data)
 352 {
 353         struct bcm_sysport_priv *priv = netdev_priv(dev);
 354         const struct bcm_sysport_stats *s;
 355         char buf[128];
 356         int i, j;
 357
 358         switch (stringset) {
 359         case ETH_SS_STATS:
 360                 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 361                         s = &bcm_sysport_gstrings_stats[i];
 362                         if (priv->is_lite &&
 363                             !bcm_sysport_lite_stat_valid(s->type))
 364                                 continue;
 365
 366                         memcpy(data + j * ETH_GSTRING_LEN, s->stat_string,
 367                                ETH_GSTRING_LEN);
 368                         j++;
 369                 }
 370
 371                 for (i = 0; i < dev->num_tx_queues; i++) {
 372                         snprintf(buf, sizeof(buf), "txq%d_packets", i);
 373                         memcpy(data + j * ETH_GSTRING_LEN, buf,
 374                                ETH_GSTRING_LEN);
 375                         j++;
 376
 377                         snprintf(buf, sizeof(buf), "txq%d_bytes", i);
 378                         memcpy(data + j * ETH_GSTRING_LEN, buf,
 379                                ETH_GSTRING_LEN);
 380                         j++;
 381                 }
 382                 break;
 383         default:
 384                 break;
 385         }
 386 }
 387
 388 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
 389 {
 390         int i, j = 0;
 391
 392         for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 393                 const struct bcm_sysport_stats *s;
 394                 u8 offset = 0;
 395                 u32 val = 0;
 396                 char *p;
 397
 398                 s = &bcm_sysport_gstrings_stats[i];
 399                 switch (s->type) {
 400                 case BCM_SYSPORT_STAT_NETDEV:
 401                 case BCM_SYSPORT_STAT_SOFT:
 402                         continue;
 403                 case BCM_SYSPORT_STAT_MIB_RX:
 404                 case BCM_SYSPORT_STAT_MIB_TX:
 405                 case BCM_SYSPORT_STAT_RUNT:
 406                         if (priv->is_lite)
 407                                 continue;
 408
 409                         if (s->type != BCM_SYSPORT_STAT_MIB_RX)
 410                                 offset = UMAC_MIB_STAT_OFFSET;
 411                         val = umac_readl(priv, UMAC_MIB_START + j + offset);
 412                         break;
 413                 case BCM_SYSPORT_STAT_RXCHK:
 414                         val = rxchk_readl(priv, s->reg_offset);
 415                         if (val == ~0)
 416                                 rxchk_writel(priv, 0, s->reg_offset);
 417                         break;
 418                 case BCM_SYSPORT_STAT_RBUF:
 419                         val = rbuf_readl(priv, s->reg_offset);
 420                         if (val == ~0)
 421                                 rbuf_writel(priv, 0, s->reg_offset);
 422                         break;
 423                 }
 424
 425                 j += s->stat_sizeof;
 426                 p = (char *)priv + s->stat_offset;
 427                 *(u32 *)p = val;
 428         }
 429
 430         netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
 431 }
 432
 433 static void bcm_sysport_get_stats(struct net_device *dev,
 434                                   struct ethtool_stats *stats, u64 *data)
 435 {
 436         struct bcm_sysport_priv *priv = netdev_priv(dev);
 437         struct bcm_sysport_tx_ring *ring;
 438         int i, j;
 439
 440         if (netif_running(dev))
 441                 bcm_sysport_update_mib_counters(priv);
 442
 443         for (i =  0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 444                 const struct bcm_sysport_stats *s;
 445                 char *p;
 446
 447                 s = &bcm_sysport_gstrings_stats[i];
 448                 if (s->type == BCM_SYSPORT_STAT_NETDEV)
 449                         p = (char *)&dev->stats;
 450                 else
 451                         p = (char *)priv;
 452
 453                 if (priv->is_lite && !bcm_sysport_lite_stat_valid(s->type))
 454                         continue;
 455
 456                 p += s->stat_offset;
 457                 data[j] = *(unsigned long *)p;
 458                 j++;
 459         }
 460
 461         /* For SYSTEMPORT Lite since we have holes in our statistics, j would
 462          * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it
 463          * needs to point to how many total statistics we have minus the
 464          * number of per TX queue statistics
 465          */
 466         j = bcm_sysport_get_sset_count(dev, ETH_SS_STATS) -
 467             dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
 468
 469         for (i = 0; i < dev->num_tx_queues; i++) {
 470                 ring = &priv->tx_rings[i];
 471                 data[j] = ring->packets;
 472                 j++;
 473                 data[j] = ring->bytes;
 474                 j++;
 475         }
 476 }
 477
 478 static void bcm_sysport_get_wol(struct net_device *dev,
 479                                 struct ethtool_wolinfo *wol)
 480 {
 481         struct bcm_sysport_priv *priv = netdev_priv(dev);
 482         u32 reg;
 483
 484         wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE;
 485         wol->wolopts = priv->wolopts;
 486
 487         if (!(priv->wolopts & WAKE_MAGICSECURE))
 488                 return;
 489
 490         /* Return the programmed SecureOn password */
 491         reg = umac_readl(priv, UMAC_PSW_MS);
 492         put_unaligned_be16(reg, &wol->sopass[0]);
 493         reg = umac_readl(priv, UMAC_PSW_LS);
 494         put_unaligned_be32(reg, &wol->sopass[2]);
 495 }
 496
 497 static int bcm_sysport_set_wol(struct net_device *dev,
 498                                struct ethtool_wolinfo *wol)
 499 {
 500         struct bcm_sysport_priv *priv = netdev_priv(dev);
 501         struct device *kdev = &priv->pdev->dev;
 502         u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE;
 503
 504         if (!device_can_wakeup(kdev))
 505                 return -ENOTSUPP;
 506
 507         if (wol->wolopts & ~supported)
 508                 return -EINVAL;
 509
 510         /* Program the SecureOn password */
 511         if (wol->wolopts & WAKE_MAGICSECURE) {
 512                 umac_writel(priv, get_unaligned_be16(&wol->sopass[0]),
 513                             UMAC_PSW_MS);
 514                 umac_writel(priv, get_unaligned_be32(&wol->sopass[2]),
 515                             UMAC_PSW_LS);
 516         }
 517
 518         /* Flag the device and relevant IRQ as wakeup capable */
 519         if (wol->wolopts) {
 520                 device_set_wakeup_enable(kdev, 1);
 521                 if (priv->wol_irq_disabled)
 522                         enable_irq_wake(priv->wol_irq);
 523                 priv->wol_irq_disabled = 0;
 524         } else {
 525                 device_set_wakeup_enable(kdev, 0);
 526                 /* Avoid unbalanced disable_irq_wake calls */
 527                 if (!priv->wol_irq_disabled)
 528                         disable_irq_wake(priv->wol_irq);
 529                 priv->wol_irq_disabled = 1;
 530         }
 531
 532         priv->wolopts = wol->wolopts;
 533
 534         return 0;
 535 }
 536
 537 static int bcm_sysport_get_coalesce(struct net_device *dev,
 538                                     struct ethtool_coalesce *ec)
 539 {
 540         struct bcm_sysport_priv *priv = netdev_priv(dev);
 541         u32 reg;
 542
 543         reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0));
 544
 545         ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000;
 546         ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK;
 547
 548         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 549
 550         ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000;
 551         ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK;
 552
 553         return 0;
 554 }
 555
 556 static int bcm_sysport_set_coalesce(struct net_device *dev,
 557                                     struct ethtool_coalesce *ec)
 558 {
 559         struct bcm_sysport_priv *priv = netdev_priv(dev);
 560         unsigned int i;
 561         u32 reg;
 562
 563         /* Base system clock is 125Mhz, DMA timeout is this reference clock
 564          * divided by 1024, which yield roughly 8.192 us, our maximum value has
 565          * to fit in the RING_TIMEOUT_MASK (16 bits).
 566          */
 567         if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
 568             ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
 569             ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
 570             ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
 571                 return -EINVAL;
 572
 573         if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
 574             (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0))
 575                 return -EINVAL;
 576
 577         for (i = 0; i < dev->num_tx_queues; i++) {
 578                 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(i));
 579                 reg &= ~(RING_INTR_THRESH_MASK |
 580                          RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT);
 581                 reg |= ec->tx_max_coalesced_frames;
 582                 reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) <<
 583                          RING_TIMEOUT_SHIFT;
 584                 tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(i));
 585         }
 586
 587         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 588         reg &= ~(RDMA_INTR_THRESH_MASK |
 589                  RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT);
 590         reg |= ec->rx_max_coalesced_frames;
 591         reg |= DIV_ROUND_UP(ec->rx_coalesce_usecs * 1000, 8192) <<
 592                             RDMA_TIMEOUT_SHIFT;
 593         rdma_writel(priv, reg, RDMA_MBDONE_INTR);
 594
 595         return 0;
 596 }
 597
 598 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
 599 {
 600         dev_consume_skb_any(cb->skb);
 601         cb->skb = NULL;
 602         dma_unmap_addr_set(cb, dma_addr, 0);
 603 }
 604
 605 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
 606                                              struct bcm_sysport_cb *cb)
 607 {
 608         struct device *kdev = &priv->pdev->dev;
 609         struct net_device *ndev = priv->netdev;
 610         struct sk_buff *skb, *rx_skb;
 611         dma_addr_t mapping;
 612
 613         /* Allocate a new SKB for a new packet */
 614         skb = netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH);
 615         if (!skb) {
 616                 priv->mib.alloc_rx_buff_failed++;
 617                 netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
 618                 return NULL;
 619         }
 620
 621         mapping = dma_map_single(kdev, skb->data,
 622                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 623         if (dma_mapping_error(kdev, mapping)) {
 624                 priv->mib.rx_dma_failed++;
 625                 dev_kfree_skb_any(skb);
 626                 netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
 627                 return NULL;
 628         }
 629
 630         /* Grab the current SKB on the ring */
 631         rx_skb = cb->skb;
 632         if (likely(rx_skb))
 633                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 634                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 635
 636         /* Put the new SKB on the ring */
 637         cb->skb = skb;
 638         dma_unmap_addr_set(cb, dma_addr, mapping);
 639         dma_desc_set_addr(priv, cb->bd_addr, mapping);
 640
 641         netif_dbg(priv, rx_status, ndev, "RX refill\n");
 642
 643         /* Return the current SKB to the caller */
 644         return rx_skb;
 645 }
 646
 647 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
 648 {
 649         struct bcm_sysport_cb *cb;
 650         struct sk_buff *skb;
 651         unsigned int i;
 652
 653         for (i = 0; i < priv->num_rx_bds; i++) {
 654                 cb = &priv->rx_cbs[i];
 655                 skb = bcm_sysport_rx_refill(priv, cb);
 656                 if (skb)
 657                         dev_kfree_skb(skb);
 658                 if (!cb->skb)
 659                         return -ENOMEM;
 660         }
 661
 662         return 0;
 663 }
 664
 665 /* Poll the hardware for up to budget packets to process */
 666 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
 667                                         unsigned int budget)
 668 {
 669         struct net_device *ndev = priv->netdev;
 670         unsigned int processed = 0, to_process;
 671         struct bcm_sysport_cb *cb;
 672         struct sk_buff *skb;
 673         unsigned int p_index;
 674         u16 len, status;
 675         struct bcm_rsb *rsb;
 676
 677         /* Clear status before servicing to reduce spurious interrupts */
 678         intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR);
 679
 680         /* Determine how much we should process since last call, SYSTEMPORT Lite
 681          * groups the producer and consumer indexes into the same 32-bit
 682          * which we access using RDMA_CONS_INDEX
 683          */
 684         if (!priv->is_lite)
 685                 p_index = rdma_readl(priv, RDMA_PROD_INDEX);
 686         else
 687                 p_index = rdma_readl(priv, RDMA_CONS_INDEX);
 688         p_index &= RDMA_PROD_INDEX_MASK;
 689
 690         to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK;
 691
 692         netif_dbg(priv, rx_status, ndev,
 693                   "p_index=%d rx_c_index=%d to_process=%d\n",
 694                   p_index, priv->rx_c_index, to_process);
 695
 696         while ((processed < to_process) && (processed < budget)) {
 697                 cb = &priv->rx_cbs[priv->rx_read_ptr];
 698                 skb = bcm_sysport_rx_refill(priv, cb);
 699
 700
 701                 /* We do not have a backing SKB, so we do not a corresponding
 702                  * DMA mapping for this incoming packet since
 703                  * bcm_sysport_rx_refill always either has both skb and mapping
 704                  * or none.
 705                  */
 706                 if (unlikely(!skb)) {
 707                         netif_err(priv, rx_err, ndev, "out of memory!\n");
 708                         ndev->stats.rx_dropped++;
 709                         ndev->stats.rx_errors++;
 710                         goto next;
 711                 }
 712
 713                 /* Extract the Receive Status Block prepended */
 714                 rsb = (struct bcm_rsb *)skb->data;
 715                 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
 716                 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
 717                           DESC_STATUS_MASK;
 718
 719                 netif_dbg(priv, rx_status, ndev,
 720                           "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
 721                           p_index, priv->rx_c_index, priv->rx_read_ptr,
 722                           len, status);
 723
 724                 if (unlikely(len > RX_BUF_LENGTH)) {
 725                         netif_err(priv, rx_status, ndev, "oversized packet\n");
 726                         ndev->stats.rx_length_errors++;
 727                         ndev->stats.rx_errors++;
 728                         dev_kfree_skb_any(skb);
 729                         goto next;
 730                 }
 731
 732                 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
 733                         netif_err(priv, rx_status, ndev, "fragmented packet!\n");
 734                         ndev->stats.rx_dropped++;
 735                         ndev->stats.rx_errors++;
 736                         dev_kfree_skb_any(skb);
 737                         goto next;
 738                 }
 739
 740                 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
 741                         netif_err(priv, rx_err, ndev, "error packet\n");
 742                         if (status & RX_STATUS_OVFLOW)
 743                                 ndev->stats.rx_over_errors++;
 744                         ndev->stats.rx_dropped++;
 745                         ndev->stats.rx_errors++;
 746                         dev_kfree_skb_any(skb);
 747                         goto next;
 748                 }
 749
 750                 skb_put(skb, len);
 751
 752                 /* Hardware validated our checksum */
 753                 if (likely(status & DESC_L4_CSUM))
 754                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 755
 756                 /* Hardware pre-pends packets with 2bytes before Ethernet
 757                  * header plus we have the Receive Status Block, strip off all
 758                  * of this from the SKB.
 759                  */
 760                 skb_pull(skb, sizeof(*rsb) + 2);
 761                 len -= (sizeof(*rsb) + 2);
 762
 763                 /* UniMAC may forward CRC */
 764                 if (priv->crc_fwd) {
 765                         skb_trim(skb, len - ETH_FCS_LEN);
 766                         len -= ETH_FCS_LEN;
 767                 }
 768
 769                 skb->protocol = eth_type_trans(skb, ndev);
 770                 ndev->stats.rx_packets++;
 771                 ndev->stats.rx_bytes += len;
 772
 773                 napi_gro_receive(&priv->napi, skb);
 774 next:
 775                 processed++;
 776                 priv->rx_read_ptr++;
 777
 778                 if (priv->rx_read_ptr == priv->num_rx_bds)
 779                         priv->rx_read_ptr = 0;
 780         }
 781
 782         return processed;
 783 }
 784
 785 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring,
 786                                        struct bcm_sysport_cb *cb,
 787                                        unsigned int *bytes_compl,
 788                                        unsigned int *pkts_compl)
 789 {
 790         struct bcm_sysport_priv *priv = ring->priv;
 791         struct device *kdev = &priv->pdev->dev;
 792
 793         if (cb->skb) {
 794                 ring->bytes += cb->skb->len;
 795                 *bytes_compl += cb->skb->len;
 796                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 797                                  dma_unmap_len(cb, dma_len),
 798                                  DMA_TO_DEVICE);
 799                 ring->packets++;
 800                 (*pkts_compl)++;
 801                 bcm_sysport_free_cb(cb);
 802         /* SKB fragment */
 803         } else if (dma_unmap_addr(cb, dma_addr)) {
 804                 ring->bytes += dma_unmap_len(cb, dma_len);
 805                 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
 806                                dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
 807                 dma_unmap_addr_set(cb, dma_addr, 0);
 808         }
 809 }
 810
 811 /* Reclaim queued SKBs for transmission completion, lockless version */
 812 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 813                                              struct bcm_sysport_tx_ring *ring)
 814 {
 815         struct net_device *ndev = priv->netdev;
 816         unsigned int c_index, last_c_index, last_tx_cn, num_tx_cbs;
 817         unsigned int pkts_compl = 0, bytes_compl = 0;
 818         struct bcm_sysport_cb *cb;
 819         u32 hw_ind;
 820
 821         /* Clear status before servicing to reduce spurious interrupts */
 822         if (!ring->priv->is_lite)
 823                 intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR);
 824         else
 825                 intrl2_0_writel(ring->priv, BIT(ring->index +
 826                                 INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR);
 827
 828         /* Compute how many descriptors have been processed since last call */
 829         hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
 830         c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
 831         ring->p_index = (hw_ind & RING_PROD_INDEX_MASK);
 832
 833         last_c_index = ring->c_index;
 834         num_tx_cbs = ring->size;
 835
 836         c_index &= (num_tx_cbs - 1);
 837
 838         if (c_index >= last_c_index)
 839                 last_tx_cn = c_index - last_c_index;
 840         else
 841                 last_tx_cn = num_tx_cbs - last_c_index + c_index;
 842
 843         netif_dbg(priv, tx_done, ndev,
 844                   "ring=%d c_index=%d last_tx_cn=%d last_c_index=%d\n",
 845                   ring->index, c_index, last_tx_cn, last_c_index);
 846
 847         while (last_tx_cn-- > 0) {
 848                 cb = ring->cbs + last_c_index;
 849                 bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl);
 850
 851                 ring->desc_count++;
 852                 last_c_index++;
 853                 last_c_index &= (num_tx_cbs - 1);
 854         }
 855
 856         ring->c_index = c_index;
 857
 858         netif_dbg(priv, tx_done, ndev,
 859                   "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
 860                   ring->index, ring->c_index, pkts_compl, bytes_compl);
 861
 862         return pkts_compl;
 863 }
 864
 865 /* Locked version of the per-ring TX reclaim routine */
 866 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 867                                            struct bcm_sysport_tx_ring *ring)
 868 {
 869         struct netdev_queue *txq;
 870         unsigned int released;
 871         unsigned long flags;
 872
 873         txq = netdev_get_tx_queue(priv->netdev, ring->index);
 874
 875         spin_lock_irqsave(&ring->lock, flags);
 876         released = __bcm_sysport_tx_reclaim(priv, ring);
 877         if (released)
 878                 netif_tx_wake_queue(txq);
 879
 880         spin_unlock_irqrestore(&ring->lock, flags);
 881
 882         return released;
 883 }
 884
 885 /* Locked version of the per-ring TX reclaim, but does not wake the queue */
 886 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv,
 887                                  struct bcm_sysport_tx_ring *ring)
 888 {
 889         unsigned long flags;
 890
 891         spin_lock_irqsave(&ring->lock, flags);
 892         __bcm_sysport_tx_reclaim(priv, ring);
 893         spin_unlock_irqrestore(&ring->lock, flags);
 894 }
 895
 896 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
 897 {
 898         struct bcm_sysport_tx_ring *ring =
 899                 container_of(napi, struct bcm_sysport_tx_ring, napi);
 900         unsigned int work_done = 0;
 901
 902         work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
 903
 904         if (work_done == 0) {
 905                 napi_complete(napi);
 906                 /* re-enable TX interrupt */
 907                 if (!ring->priv->is_lite)
 908                         intrl2_1_mask_clear(ring->priv, BIT(ring->index));
 909                 else
 910                         intrl2_0_mask_clear(ring->priv, BIT(ring->index +
 911                                             INTRL2_0_TDMA_MBDONE_SHIFT));
 912
 913                 return 0;
 914         }
 915
 916         return budget;
 917 }
 918
 919 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
 920 {
 921         unsigned int q;
 922
 923         for (q = 0; q < priv->netdev->num_tx_queues; q++)
 924                 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
 925 }
 926
 927 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
 928 {
 929         struct bcm_sysport_priv *priv =
 930                 container_of(napi, struct bcm_sysport_priv, napi);
 931         unsigned int work_done = 0;
 932
 933         work_done = bcm_sysport_desc_rx(priv, budget);
 934
 935         priv->rx_c_index += work_done;
 936         priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
 937
 938         /* SYSTEMPORT Lite groups the producer/consumer index, producer is
 939          * maintained by HW, but writes to it will be ignore while RDMA
 940          * is active
 941          */
 942         if (!priv->is_lite)
 943                 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
 944         else
 945                 rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX);
 946
 947         if (work_done < budget) {
 948                 napi_complete_done(napi, work_done);
 949                 /* re-enable RX interrupts */
 950                 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
 951         }
 952
 953         return work_done;
 954 }
 955
 956 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
 957 {
 958         u32 reg;
 959
 960         /* Stop monitoring MPD interrupt */
 961         intrl2_0_mask_set(priv, INTRL2_0_MPD);
 962
 963         /* Clear the MagicPacket detection logic */
 964         reg = umac_readl(priv, UMAC_MPD_CTRL);
 965         reg &= ~MPD_EN;
 966         umac_writel(priv, reg, UMAC_MPD_CTRL);
 967
 968         netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
 969 }
 970
 971 /* RX and misc interrupt routine */
 972 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
 973 {
 974         struct net_device *dev = dev_id;
 975         struct bcm_sysport_priv *priv = netdev_priv(dev);
 976         struct bcm_sysport_tx_ring *txr;
 977         unsigned int ring, ring_bit;
 978
 979         priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
 980                           ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
 981         intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
 982
 983         if (unlikely(priv->irq0_stat == 0)) {
 984                 netdev_warn(priv->netdev, "spurious RX interrupt\n");
 985                 return IRQ_NONE;
 986         }
 987
 988         if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
 989                 if (likely(napi_schedule_prep(&priv->napi))) {
 990                         /* disable RX interrupts */
 991                         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
 992                         __napi_schedule_irqoff(&priv->napi);
 993                 }
 994         }
 995
 996         /* TX ring is full, perform a full reclaim since we do not know
 997          * which one would trigger this interrupt
 998          */
 999         if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
1000                 bcm_sysport_tx_reclaim_all(priv);
1001
1002         if (priv->irq0_stat & INTRL2_0_MPD) {
1003                 netdev_info(priv->netdev, "Wake-on-LAN interrupt!\n");
1004                 bcm_sysport_resume_from_wol(priv);
1005         }
1006
1007         if (!priv->is_lite)
1008                 goto out;
1009
1010         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1011                 ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT);
1012                 if (!(priv->irq0_stat & ring_bit))
1013                         continue;
1014
1015                 txr = &priv->tx_rings[ring];
1016
1017                 if (likely(napi_schedule_prep(&txr->napi))) {
1018                         intrl2_0_mask_set(priv, ring_bit);
1019                         __napi_schedule(&txr->napi);
1020                 }
1021         }
1022 out:
1023         return IRQ_HANDLED;
1024 }
1025
1026 /* TX interrupt service routine */
1027 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
1028 {
1029         struct net_device *dev = dev_id;
1030         struct bcm_sysport_priv *priv = netdev_priv(dev);
1031         struct bcm_sysport_tx_ring *txr;
1032         unsigned int ring;
1033
1034         priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
1035                                 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
1036         intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1037
1038         if (unlikely(priv->irq1_stat == 0)) {
1039                 netdev_warn(priv->netdev, "spurious TX interrupt\n");
1040                 return IRQ_NONE;
1041         }
1042
1043         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1044                 if (!(priv->irq1_stat & BIT(ring)))
1045                         continue;
1046
1047                 txr = &priv->tx_rings[ring];
1048
1049                 if (likely(napi_schedule_prep(&txr->napi))) {
1050                         intrl2_1_mask_set(priv, BIT(ring));
1051                         __napi_schedule_irqoff(&txr->napi);
1052                 }
1053         }
1054
1055         return IRQ_HANDLED;
1056 }
1057
1058 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
1059 {
1060         struct bcm_sysport_priv *priv = dev_id;
1061
1062         pm_wakeup_event(&priv->pdev->dev, 0);
1063
1064         return IRQ_HANDLED;
1065 }
1066
1067 #ifdef CONFIG_NET_POLL_CONTROLLER
1068 static void bcm_sysport_poll_controller(struct net_device *dev)
1069 {
1070         struct bcm_sysport_priv *priv = netdev_priv(dev);
1071
1072         disable_irq(priv->irq0);
1073         bcm_sysport_rx_isr(priv->irq0, priv);
1074         enable_irq(priv->irq0);
1075
1076         if (!priv->is_lite) {
1077                 disable_irq(priv->irq1);
1078                 bcm_sysport_tx_isr(priv->irq1, priv);
1079                 enable_irq(priv->irq1);
1080         }
1081 }
1082 #endif
1083
1084 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
1085                                               struct net_device *dev)
1086 {
1087         struct sk_buff *nskb;
1088         struct bcm_tsb *tsb;
1089         u32 csum_info;
1090         u8 ip_proto;
1091         u16 csum_start;
1092         u16 ip_ver;
1093
1094         /* Re-allocate SKB if needed */
1095         if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
1096                 nskb = skb_realloc_headroom(skb, sizeof(*tsb));
1097                 dev_kfree_skb(skb);
1098                 if (!nskb) {
1099                         dev->stats.tx_errors++;
1100                         dev->stats.tx_dropped++;
1101                         return NULL;
1102                 }
1103                 skb = nskb;
1104         }
1105
1106         tsb = skb_push(skb, sizeof(*tsb));
1107         /* Zero-out TSB by default */
1108         memset(tsb, 0, sizeof(*tsb));
1109
1110         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1111                 ip_ver = htons(skb->protocol);
1112                 switch (ip_ver) {
1113                 case ETH_P_IP:
1114                         ip_proto = ip_hdr(skb)->protocol;
1115                         break;
1116                 case ETH_P_IPV6:
1117                         ip_proto = ipv6_hdr(skb)->nexthdr;
1118                         break;
1119                 default:
1120                         return skb;
1121                 }
1122
1123                 /* Get the checksum offset and the L4 (transport) offset */
1124                 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
1125                 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
1126                 csum_info |= (csum_start << L4_PTR_SHIFT);
1127
1128                 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1129                         csum_info |= L4_LENGTH_VALID;
1130                         if (ip_proto == IPPROTO_UDP && ip_ver == ETH_P_IP)
1131                                 csum_info |= L4_UDP;
1132                 } else {
1133                         csum_info = 0;
1134                 }
1135
1136                 tsb->l4_ptr_dest_map = csum_info;
1137         }
1138
1139         return skb;
1140 }
1141
1142 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
1143                                     struct net_device *dev)
1144 {
1145         struct bcm_sysport_priv *priv = netdev_priv(dev);
1146         struct device *kdev = &priv->pdev->dev;
1147         struct bcm_sysport_tx_ring *ring;
1148         struct bcm_sysport_cb *cb;
1149         struct netdev_queue *txq;
1150         struct dma_desc *desc;
1151         unsigned int skb_len;
1152         unsigned long flags;
1153         dma_addr_t mapping;
1154         u32 len_status;
1155         u16 queue;
1156         int ret;
1157
1158         queue = skb_get_queue_mapping(skb);
1159         txq = netdev_get_tx_queue(dev, queue);
1160         ring = &priv->tx_rings[queue];
1161
1162         /* lock against tx reclaim in BH context and TX ring full interrupt */
1163         spin_lock_irqsave(&ring->lock, flags);
1164         if (unlikely(ring->desc_count == 0)) {
1165                 netif_tx_stop_queue(txq);
1166                 netdev_err(dev, "queue %d awake and ring full!\n", queue);
1167                 ret = NETDEV_TX_BUSY;
1168                 goto out;
1169         }
1170
1171         /* The Ethernet switch we are interfaced with needs packets to be at
1172          * least 64 bytes (including FCS) otherwise they will be discarded when
1173          * they enter the switch port logic. When Broadcom tags are enabled, we
1174          * need to make sure that packets are at least 68 bytes
1175          * (including FCS and tag) because the length verification is done after
1176          * the Broadcom tag is stripped off the ingress packet.
1177          */
1178         if (skb_put_padto(skb, ETH_ZLEN + ENET_BRCM_TAG_LEN)) {
1179                 ret = NETDEV_TX_OK;
1180                 goto out;
1181         }
1182
1183         /* Insert TSB and checksum infos */
1184         if (priv->tsb_en) {
1185                 skb = bcm_sysport_insert_tsb(skb, dev);
1186                 if (!skb) {
1187                         ret = NETDEV_TX_OK;
1188                         goto out;
1189                 }
1190         }
1191
1192         skb_len = skb->len;
1193
1194         mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1195         if (dma_mapping_error(kdev, mapping)) {
1196                 priv->mib.tx_dma_failed++;
1197                 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
1198                           skb->data, skb_len);
1199                 ret = NETDEV_TX_OK;
1200                 goto out;
1201         }
1202
1203         /* Remember the SKB for future freeing */
1204         cb = &ring->cbs[ring->curr_desc];
1205         cb->skb = skb;
1206         dma_unmap_addr_set(cb, dma_addr, mapping);
1207         dma_unmap_len_set(cb, dma_len, skb_len);
1208
1209         /* Fetch a descriptor entry from our pool */
1210         desc = ring->desc_cpu;
1211
1212         desc->addr_lo = lower_32_bits(mapping);
1213         len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
1214         len_status |= (skb_len << DESC_LEN_SHIFT);
1215         len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
1216                        DESC_STATUS_SHIFT;
1217         if (skb->ip_summed == CHECKSUM_PARTIAL)
1218                 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1219
1220         ring->curr_desc++;
1221         if (ring->curr_desc == ring->size)
1222                 ring->curr_desc = 0;
1223         ring->desc_count--;
1224
1225         /* Ensure write completion of the descriptor status/length
1226          * in DRAM before the System Port WRITE_PORT register latches
1227          * the value
1228          */
1229         wmb();
1230         desc->addr_status_len = len_status;
1231         wmb();
1232
1233         /* Write this descriptor address to the RING write port */
1234         tdma_port_write_desc_addr(priv, desc, ring->index);
1235
1236         /* Check ring space and update SW control flow */
1237         if (ring->desc_count == 0)
1238                 netif_tx_stop_queue(txq);
1239
1240         netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
1241                   ring->index, ring->desc_count, ring->curr_desc);
1242
1243         ret = NETDEV_TX_OK;
1244 out:
1245         spin_unlock_irqrestore(&ring->lock, flags);
1246         return ret;
1247 }
1248
1249 static void bcm_sysport_tx_timeout(struct net_device *dev)
1250 {
1251         netdev_warn(dev, "transmit timeout!\n");
1252
1253         netif_trans_update(dev);
1254         dev->stats.tx_errors++;
1255
1256         netif_tx_wake_all_queues(dev);
1257 }
1258
1259 /* phylib adjust link callback */
1260 static void bcm_sysport_adj_link(struct net_device *dev)
1261 {
1262         struct bcm_sysport_priv *priv = netdev_priv(dev);
1263         struct phy_device *phydev = dev->phydev;
1264         unsigned int changed = 0;
1265         u32 cmd_bits = 0, reg;
1266
1267         if (priv->old_link != phydev->link) {
1268                 changed = 1;
1269                 priv->old_link = phydev->link;
1270         }
1271
1272         if (priv->old_duplex != phydev->duplex) {
1273                 changed = 1;
1274                 priv->old_duplex = phydev->duplex;
1275         }
1276
1277         if (priv->is_lite)
1278                 goto out;
1279
1280         switch (phydev->speed) {
1281         case SPEED_2500:
1282                 cmd_bits = CMD_SPEED_2500;
1283                 break;
1284         case SPEED_1000:
1285                 cmd_bits = CMD_SPEED_1000;
1286                 break;
1287         case SPEED_100:
1288                 cmd_bits = CMD_SPEED_100;
1289                 break;
1290         case SPEED_10:
1291                 cmd_bits = CMD_SPEED_10;
1292                 break;
1293         default:
1294                 break;
1295         }
1296         cmd_bits <<= CMD_SPEED_SHIFT;
1297
1298         if (phydev->duplex == DUPLEX_HALF)
1299                 cmd_bits |= CMD_HD_EN;
1300
1301         if (priv->old_pause != phydev->pause) {
1302                 changed = 1;
1303                 priv->old_pause = phydev->pause;
1304         }
1305
1306         if (!phydev->pause)
1307                 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1308
1309         if (!changed)
1310                 return;
1311
1312         if (phydev->link) {
1313                 reg = umac_readl(priv, UMAC_CMD);
1314                 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
1315                         CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1316                         CMD_TX_PAUSE_IGNORE);
1317                 reg |= cmd_bits;
1318                 umac_writel(priv, reg, UMAC_CMD);
1319         }
1320 out:
1321         if (changed)
1322                 phy_print_status(phydev);
1323 }
1324
1325 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1326                                     unsigned int index)
1327 {
1328         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1329         struct device *kdev = &priv->pdev->dev;
1330         size_t size;
1331         void *p;
1332         u32 reg;
1333
1334         /* Simple descriptors partitioning for now */
1335         size = 256;
1336
1337         /* We just need one DMA descriptor which is DMA-able, since writing to
1338          * the port will allocate a new descriptor in its internal linked-list
1339          */
1340         p = dma_zalloc_coherent(kdev, sizeof(struct dma_desc), &ring->desc_dma,
1341                                 GFP_KERNEL);
1342         if (!p) {
1343                 netif_err(priv, hw, priv->netdev, "DMA alloc failed\n");
1344                 return -ENOMEM;
1345         }
1346
1347         ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1348         if (!ring->cbs) {
1349                 dma_free_coherent(kdev, sizeof(struct dma_desc),
1350                                   ring->desc_cpu, ring->desc_dma);
1351                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1352                 return -ENOMEM;
1353         }
1354
1355         /* Initialize SW view of the ring */
1356         spin_lock_init(&ring->lock);
1357         ring->priv = priv;
1358         netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64);
1359         ring->index = index;
1360         ring->size = size;
1361         ring->alloc_size = ring->size;
1362         ring->desc_cpu = p;
1363         ring->desc_count = ring->size;
1364         ring->curr_desc = 0;
1365
1366         /* Initialize HW ring */
1367         tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1368         tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1369         tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1370         tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1371         tdma_writel(priv, RING_IGNORE_STATUS, TDMA_DESC_RING_MAPPING(index));
1372         tdma_writel(priv, 0, TDMA_DESC_RING_PCP_DEI_VID(index));
1373
1374         /* Program the number of descriptors as MAX_THRESHOLD and half of
1375          * its size for the hysteresis trigger
1376          */
1377         tdma_writel(priv, ring->size |
1378                         1 << RING_HYST_THRESH_SHIFT,
1379                         TDMA_DESC_RING_MAX_HYST(index));
1380
1381         /* Enable the ring queue in the arbiter */
1382         reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1383         reg |= (1 << index);
1384         tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1385
1386         napi_enable(&ring->napi);
1387
1388         netif_dbg(priv, hw, priv->netdev,
1389                   "TDMA cfg, size=%d, desc_cpu=%p\n",
1390                   ring->size, ring->desc_cpu);
1391
1392         return 0;
1393 }
1394
1395 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1396                                      unsigned int index)
1397 {
1398         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1399         struct device *kdev = &priv->pdev->dev;
1400         u32 reg;
1401
1402         /* Caller should stop the TDMA engine */
1403         reg = tdma_readl(priv, TDMA_STATUS);
1404         if (!(reg & TDMA_DISABLED))
1405                 netdev_warn(priv->netdev, "TDMA not stopped!\n");
1406
1407         /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1408          * fail, so by checking this pointer we know whether the TX ring was
1409          * fully initialized or not.
1410          */
1411         if (!ring->cbs)
1412                 return;
1413
1414         napi_disable(&ring->napi);
1415         netif_napi_del(&ring->napi);
1416
1417         bcm_sysport_tx_clean(priv, ring);
1418
1419         kfree(ring->cbs);
1420         ring->cbs = NULL;
1421
1422         if (ring->desc_dma) {
1423                 dma_free_coherent(kdev, sizeof(struct dma_desc),
1424                                   ring->desc_cpu, ring->desc_dma);
1425                 ring->desc_dma = 0;
1426         }
1427         ring->size = 0;
1428         ring->alloc_size = 0;
1429
1430         netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1431 }
1432
1433 /* RDMA helper */
1434 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1435                                   unsigned int enable)
1436 {
1437         unsigned int timeout = 1000;
1438         u32 reg;
1439
1440         reg = rdma_readl(priv, RDMA_CONTROL);
1441         if (enable)
1442                 reg |= RDMA_EN;
1443         else
1444                 reg &= ~RDMA_EN;
1445         rdma_writel(priv, reg, RDMA_CONTROL);
1446
1447         /* Poll for RMDA disabling completion */
1448         do {
1449                 reg = rdma_readl(priv, RDMA_STATUS);
1450                 if (!!(reg & RDMA_DISABLED) == !enable)
1451                         return 0;
1452                 usleep_range(1000, 2000);
1453         } while (timeout-- > 0);
1454
1455         netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1456
1457         return -ETIMEDOUT;
1458 }
1459
1460 /* TDMA helper */
1461 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1462                                   unsigned int enable)
1463 {
1464         unsigned int timeout = 1000;
1465         u32 reg;
1466
1467         reg = tdma_readl(priv, TDMA_CONTROL);
1468         if (enable)
1469                 reg |= tdma_control_bit(priv, TDMA_EN);
1470         else
1471                 reg &= ~tdma_control_bit(priv, TDMA_EN);
1472         tdma_writel(priv, reg, TDMA_CONTROL);
1473
1474         /* Poll for TMDA disabling completion */
1475         do {
1476                 reg = tdma_readl(priv, TDMA_STATUS);
1477                 if (!!(reg & TDMA_DISABLED) == !enable)
1478                         return 0;
1479
1480                 usleep_range(1000, 2000);
1481         } while (timeout-- > 0);
1482
1483         netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1484
1485         return -ETIMEDOUT;
1486 }
1487
1488 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1489 {
1490         struct bcm_sysport_cb *cb;
1491         u32 reg;
1492         int ret;
1493         int i;
1494
1495         /* Initialize SW view of the RX ring */
1496         priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC;
1497         priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1498         priv->rx_c_index = 0;
1499         priv->rx_read_ptr = 0;
1500         priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1501                                 GFP_KERNEL);
1502         if (!priv->rx_cbs) {
1503                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1504                 return -ENOMEM;
1505         }
1506
1507         for (i = 0; i < priv->num_rx_bds; i++) {
1508                 cb = priv->rx_cbs + i;
1509                 cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1510         }
1511
1512         ret = bcm_sysport_alloc_rx_bufs(priv);
1513         if (ret) {
1514                 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1515                 return ret;
1516         }
1517
1518         /* Initialize HW, ensure RDMA is disabled */
1519         reg = rdma_readl(priv, RDMA_STATUS);
1520         if (!(reg & RDMA_DISABLED))
1521                 rdma_enable_set(priv, 0);
1522
1523         rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1524         rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1525         rdma_writel(priv, 0, RDMA_PROD_INDEX);
1526         rdma_writel(priv, 0, RDMA_CONS_INDEX);
1527         rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1528                           RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1529         /* Operate the queue in ring mode */
1530         rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1531         rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1532         rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1533         rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO);
1534
1535         rdma_writel(priv, 1, RDMA_MBDONE_INTR);
1536
1537         netif_dbg(priv, hw, priv->netdev,
1538                   "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1539                   priv->num_rx_bds, priv->rx_bds);
1540
1541         return 0;
1542 }
1543
1544 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1545 {
1546         struct bcm_sysport_cb *cb;
1547         unsigned int i;
1548         u32 reg;
1549
1550         /* Caller should ensure RDMA is disabled */
1551         reg = rdma_readl(priv, RDMA_STATUS);
1552         if (!(reg & RDMA_DISABLED))
1553                 netdev_warn(priv->netdev, "RDMA not stopped!\n");
1554
1555         for (i = 0; i < priv->num_rx_bds; i++) {
1556                 cb = &priv->rx_cbs[i];
1557                 if (dma_unmap_addr(cb, dma_addr))
1558                         dma_unmap_single(&priv->pdev->dev,
1559                                          dma_unmap_addr(cb, dma_addr),
1560                                          RX_BUF_LENGTH, DMA_FROM_DEVICE);
1561                 bcm_sysport_free_cb(cb);
1562         }
1563
1564         kfree(priv->rx_cbs);
1565         priv->rx_cbs = NULL;
1566
1567         netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1568 }
1569
1570 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1571 {
1572         struct bcm_sysport_priv *priv = netdev_priv(dev);
1573         u32 reg;
1574
1575         if (priv->is_lite)
1576                 return;
1577
1578         reg = umac_readl(priv, UMAC_CMD);
1579         if (dev->flags & IFF_PROMISC)
1580                 reg |= CMD_PROMISC;
1581         else
1582                 reg &= ~CMD_PROMISC;
1583         umac_writel(priv, reg, UMAC_CMD);
1584
1585         /* No support for ALLMULTI */
1586         if (dev->flags & IFF_ALLMULTI)
1587                 return;
1588 }
1589
1590 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1591                                    u32 mask, unsigned int enable)
1592 {
1593         u32 reg;
1594
1595         if (!priv->is_lite) {
1596                 reg = umac_readl(priv, UMAC_CMD);
1597                 if (enable)
1598                         reg |= mask;
1599                 else
1600                         reg &= ~mask;
1601                 umac_writel(priv, reg, UMAC_CMD);
1602         } else {
1603                 reg = gib_readl(priv, GIB_CONTROL);
1604                 if (enable)
1605                         reg |= mask;
1606                 else
1607                         reg &= ~mask;
1608                 gib_writel(priv, reg, GIB_CONTROL);
1609         }
1610
1611         /* UniMAC stops on a packet boundary, wait for a full-sized packet
1612          * to be processed (1 msec).
1613          */
1614         if (enable == 0)
1615                 usleep_range(1000, 2000);
1616 }
1617
1618 static inline void umac_reset(struct bcm_sysport_priv *priv)
1619 {
1620         u32 reg;
1621
1622         if (priv->is_lite)
1623                 return;
1624
1625         reg = umac_readl(priv, UMAC_CMD);
1626         reg |= CMD_SW_RESET;
1627         umac_writel(priv, reg, UMAC_CMD);
1628         udelay(10);
1629         reg = umac_readl(priv, UMAC_CMD);
1630         reg &= ~CMD_SW_RESET;
1631         umac_writel(priv, reg, UMAC_CMD);
1632 }
1633
1634 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1635                              unsigned char *addr)
1636 {
1637         u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) |
1638                     addr[3];
1639         u32 mac1 = (addr[4] << 8) | addr[5];
1640
1641         if (!priv->is_lite) {
1642                 umac_writel(priv, mac0, UMAC_MAC0);
1643                 umac_writel(priv, mac1, UMAC_MAC1);
1644         } else {
1645                 gib_writel(priv, mac0, GIB_MAC0);
1646                 gib_writel(priv, mac1, GIB_MAC1);
1647         }
1648 }
1649
1650 static void topctrl_flush(struct bcm_sysport_priv *priv)
1651 {
1652         topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1653         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1654         mdelay(1);
1655         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1656         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1657 }
1658
1659 static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1660 {
1661         struct bcm_sysport_priv *priv = netdev_priv(dev);
1662         struct sockaddr *addr = p;
1663
1664         if (!is_valid_ether_addr(addr->sa_data))
1665                 return -EINVAL;
1666
1667         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1668
1669         /* interface is disabled, changes to MAC will be reflected on next
1670          * open call
1671          */
1672         if (!netif_running(dev))
1673                 return 0;
1674
1675         umac_set_hw_addr(priv, dev->dev_addr);
1676
1677         return 0;
1678 }
1679
1680 static struct net_device_stats *bcm_sysport_get_nstats(struct net_device *dev)
1681 {
1682         struct bcm_sysport_priv *priv = netdev_priv(dev);
1683         unsigned long tx_bytes = 0, tx_packets = 0;
1684         struct bcm_sysport_tx_ring *ring;
1685         unsigned int q;
1686
1687         for (q = 0; q < dev->num_tx_queues; q++) {
1688                 ring = &priv->tx_rings[q];
1689                 tx_bytes += ring->bytes;
1690                 tx_packets += ring->packets;
1691         }
1692
1693         dev->stats.tx_bytes = tx_bytes;
1694         dev->stats.tx_packets = tx_packets;
1695         return &dev->stats;
1696 }
1697
1698 static void bcm_sysport_netif_start(struct net_device *dev)
1699 {
1700         struct bcm_sysport_priv *priv = netdev_priv(dev);
1701
1702         /* Enable NAPI */
1703         napi_enable(&priv->napi);
1704
1705         /* Enable RX interrupt and TX ring full interrupt */
1706         intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1707
1708         phy_start(dev->phydev);
1709
1710         /* Enable TX interrupts for the TXQs */
1711         if (!priv->is_lite)
1712                 intrl2_1_mask_clear(priv, 0xffffffff);
1713         else
1714                 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK);
1715
1716         /* Last call before we start the real business */
1717         netif_tx_start_all_queues(dev);
1718 }
1719
1720 static void rbuf_init(struct bcm_sysport_priv *priv)
1721 {
1722         u32 reg;
1723
1724         reg = rbuf_readl(priv, RBUF_CONTROL);
1725         reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1726         /* Set a correct RSB format on SYSTEMPORT Lite */
1727         if (priv->is_lite) {
1728                 reg &= ~RBUF_RSB_SWAP1;
1729                 reg |= RBUF_RSB_SWAP0;
1730         }
1731         rbuf_writel(priv, reg, RBUF_CONTROL);
1732 }
1733
1734 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv)
1735 {
1736         intrl2_0_mask_set(priv, 0xffffffff);
1737         intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1738         if (!priv->is_lite) {
1739                 intrl2_1_mask_set(priv, 0xffffffff);
1740                 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1741         }
1742 }
1743
1744 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv)
1745 {
1746         u32 __maybe_unused reg;
1747
1748         /* Include Broadcom tag in pad extension */
1749         if (netdev_uses_dsa(priv->netdev)) {
1750                 reg = gib_readl(priv, GIB_CONTROL);
1751                 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT);
1752                 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT;
1753                 gib_writel(priv, reg, GIB_CONTROL);
1754         }
1755 }
1756
1757 static int bcm_sysport_open(struct net_device *dev)
1758 {
1759         struct bcm_sysport_priv *priv = netdev_priv(dev);
1760         struct phy_device *phydev;
1761         unsigned int i;
1762         int ret;
1763
1764         /* Reset UniMAC */
1765         umac_reset(priv);
1766
1767         /* Flush TX and RX FIFOs at TOPCTRL level */
1768         topctrl_flush(priv);
1769
1770         /* Disable the UniMAC RX/TX */
1771         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1772
1773         /* Enable RBUF 2bytes alignment and Receive Status Block */
1774         rbuf_init(priv);
1775
1776         /* Set maximum frame length */
1777         if (!priv->is_lite)
1778                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1779         else
1780                 gib_set_pad_extension(priv);
1781
1782         /* Set MAC address */
1783         umac_set_hw_addr(priv, dev->dev_addr);
1784
1785         /* Read CRC forward */
1786         if (!priv->is_lite)
1787                 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
1788         else
1789                 priv->crc_fwd = !!(gib_readl(priv, GIB_CONTROL) &
1790                                    GIB_FCS_STRIP);
1791
1792         phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1793                                 0, priv->phy_interface);
1794         if (!phydev) {
1795                 netdev_err(dev, "could not attach to PHY\n");
1796                 return -ENODEV;
1797         }
1798
1799         /* Reset house keeping link status */
1800         priv->old_duplex = -1;
1801         priv->old_link = -1;
1802         priv->old_pause = -1;
1803
1804         /* mask all interrupts and request them */
1805         bcm_sysport_mask_all_intrs(priv);
1806
1807         ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
1808         if (ret) {
1809                 netdev_err(dev, "failed to request RX interrupt\n");
1810                 goto out_phy_disconnect;
1811         }
1812
1813         if (!priv->is_lite) {
1814                 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0,
1815                                   dev->name, dev);
1816                 if (ret) {
1817                         netdev_err(dev, "failed to request TX interrupt\n");
1818                         goto out_free_irq0;
1819                 }
1820         }
1821
1822         /* Initialize both hardware and software ring */
1823         for (i = 0; i < dev->num_tx_queues; i++) {
1824                 ret = bcm_sysport_init_tx_ring(priv, i);
1825                 if (ret) {
1826                         netdev_err(dev, "failed to initialize TX ring %d\n",
1827                                    i);
1828                         goto out_free_tx_ring;
1829                 }
1830         }
1831
1832         /* Initialize linked-list */
1833         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
1834
1835         /* Initialize RX ring */
1836         ret = bcm_sysport_init_rx_ring(priv);
1837         if (ret) {
1838                 netdev_err(dev, "failed to initialize RX ring\n");
1839                 goto out_free_rx_ring;
1840         }
1841
1842         /* Turn on RDMA */
1843         ret = rdma_enable_set(priv, 1);
1844         if (ret)
1845                 goto out_free_rx_ring;
1846
1847         /* Turn on TDMA */
1848         ret = tdma_enable_set(priv, 1);
1849         if (ret)
1850                 goto out_clear_rx_int;
1851
1852         /* Turn on UniMAC TX/RX */
1853         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
1854
1855         bcm_sysport_netif_start(dev);
1856
1857         return 0;
1858
1859 out_clear_rx_int:
1860         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1861 out_free_rx_ring:
1862         bcm_sysport_fini_rx_ring(priv);
1863 out_free_tx_ring:
1864         for (i = 0; i < dev->num_tx_queues; i++)
1865                 bcm_sysport_fini_tx_ring(priv, i);
1866         if (!priv->is_lite)
1867                 free_irq(priv->irq1, dev);
1868 out_free_irq0:
1869         free_irq(priv->irq0, dev);
1870 out_phy_disconnect:
1871         phy_disconnect(phydev);
1872         return ret;
1873 }
1874
1875 static void bcm_sysport_netif_stop(struct net_device *dev)
1876 {
1877         struct bcm_sysport_priv *priv = netdev_priv(dev);
1878
1879         /* stop all software from updating hardware */
1880         netif_tx_stop_all_queues(dev);
1881         napi_disable(&priv->napi);
1882         phy_stop(dev->phydev);
1883
1884         /* mask all interrupts */
1885         bcm_sysport_mask_all_intrs(priv);
1886 }
1887
1888 static int bcm_sysport_stop(struct net_device *dev)
1889 {
1890         struct bcm_sysport_priv *priv = netdev_priv(dev);
1891         unsigned int i;
1892         int ret;
1893
1894         bcm_sysport_netif_stop(dev);
1895
1896         /* Disable UniMAC RX */
1897         umac_enable_set(priv, CMD_RX_EN, 0);
1898
1899         ret = tdma_enable_set(priv, 0);
1900         if (ret) {
1901                 netdev_err(dev, "timeout disabling RDMA\n");
1902                 return ret;
1903         }
1904
1905         /* Wait for a maximum packet size to be drained */
1906         usleep_range(2000, 3000);
1907
1908         ret = rdma_enable_set(priv, 0);
1909         if (ret) {
1910                 netdev_err(dev, "timeout disabling TDMA\n");
1911                 return ret;
1912         }
1913
1914         /* Disable UniMAC TX */
1915         umac_enable_set(priv, CMD_TX_EN, 0);
1916
1917         /* Free RX/TX rings SW structures */
1918         for (i = 0; i < dev->num_tx_queues; i++)
1919                 bcm_sysport_fini_tx_ring(priv, i);
1920         bcm_sysport_fini_rx_ring(priv);
1921
1922         free_irq(priv->irq0, dev);
1923         if (!priv->is_lite)
1924                 free_irq(priv->irq1, dev);
1925
1926         /* Disconnect from PHY */
1927         phy_disconnect(dev->phydev);
1928
1929         return 0;
1930 }
1931
1932 static const struct ethtool_ops bcm_sysport_ethtool_ops = {
1933         .get_drvinfo            = bcm_sysport_get_drvinfo,
1934         .get_msglevel           = bcm_sysport_get_msglvl,
1935         .set_msglevel           = bcm_sysport_set_msglvl,
1936         .get_link               = ethtool_op_get_link,
1937         .get_strings            = bcm_sysport_get_strings,
1938         .get_ethtool_stats      = bcm_sysport_get_stats,
1939         .get_sset_count         = bcm_sysport_get_sset_count,
1940         .get_wol                = bcm_sysport_get_wol,
1941         .set_wol                = bcm_sysport_set_wol,
1942         .get_coalesce           = bcm_sysport_get_coalesce,
1943         .set_coalesce           = bcm_sysport_set_coalesce,
1944         .get_link_ksettings     = phy_ethtool_get_link_ksettings,
1945         .set_link_ksettings     = phy_ethtool_set_link_ksettings,
1946 };
1947
1948 static const struct net_device_ops bcm_sysport_netdev_ops = {
1949         .ndo_start_xmit         = bcm_sysport_xmit,
1950         .ndo_tx_timeout         = bcm_sysport_tx_timeout,
1951         .ndo_open               = bcm_sysport_open,
1952         .ndo_stop               = bcm_sysport_stop,
1953         .ndo_set_features       = bcm_sysport_set_features,
1954         .ndo_set_rx_mode        = bcm_sysport_set_rx_mode,
1955         .ndo_set_mac_address    = bcm_sysport_change_mac,
1956 #ifdef CONFIG_NET_POLL_CONTROLLER
1957         .ndo_poll_controller    = bcm_sysport_poll_controller,
1958 #endif
1959         .ndo_get_stats          = bcm_sysport_get_nstats,
1960 };
1961
1962 #define REV_FMT "v%2x.%02x"
1963
1964 static const struct bcm_sysport_hw_params bcm_sysport_params[] = {
1965         [SYSTEMPORT] = {
1966                 .is_lite = false,
1967                 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS,
1968         },
1969         [SYSTEMPORT_LITE] = {
1970                 .is_lite = true,
1971                 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS,
1972         },
1973 };
1974
1975 static const struct of_device_id bcm_sysport_of_match[] = {
1976         { .compatible = "brcm,systemportlite-v1.00",
1977           .data = &bcm_sysport_params[SYSTEMPORT_LITE] },
1978         { .compatible = "brcm,systemport-v1.00",
1979           .data = &bcm_sysport_params[SYSTEMPORT] },
1980         { .compatible = "brcm,systemport",
1981           .data = &bcm_sysport_params[SYSTEMPORT] },
1982         { /* sentinel */ }
1983 };
1984 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
1985
1986 static int bcm_sysport_probe(struct platform_device *pdev)
1987 {
1988         const struct bcm_sysport_hw_params *params;
1989         const struct of_device_id *of_id = NULL;
1990         struct bcm_sysport_priv *priv;
1991         struct device_node *dn;
1992         struct net_device *dev;
1993         const void *macaddr;
1994         struct resource *r;
1995         u32 txq, rxq;
1996         int ret;
1997
1998         dn = pdev->dev.of_node;
1999         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2000         of_id = of_match_node(bcm_sysport_of_match, dn);
2001         if (!of_id || !of_id->data)
2002                 return -EINVAL;
2003
2004         /* Fairly quickly we need to know the type of adapter we have */
2005         params = of_id->data;
2006
2007         /* Read the Transmit/Receive Queue properties */
2008         if (of_property_read_u32(dn, "systemport,num-txq", &txq))
2009                 txq = TDMA_NUM_RINGS;
2010         if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
2011                 rxq = 1;
2012
2013         /* Sanity check the number of transmit queues */
2014         if (!txq || txq > TDMA_NUM_RINGS)
2015                 return -EINVAL;
2016
2017         dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
2018         if (!dev)
2019                 return -ENOMEM;
2020
2021         /* Initialize private members */
2022         priv = netdev_priv(dev);
2023
2024         /* Allocate number of TX rings */
2025         priv->tx_rings = devm_kcalloc(&pdev->dev, txq,
2026                                       sizeof(struct bcm_sysport_tx_ring),
2027                                       GFP_KERNEL);
2028         if (!priv->tx_rings)
2029                 return -ENOMEM;
2030
2031         priv->is_lite = params->is_lite;
2032         priv->num_rx_desc_words = params->num_rx_desc_words;
2033
2034         priv->irq0 = platform_get_irq(pdev, 0);
2035         if (!priv->is_lite) {
2036                 priv->irq1 = platform_get_irq(pdev, 1);
2037                 priv->wol_irq = platform_get_irq(pdev, 2);
2038         } else {
2039                 priv->wol_irq = platform_get_irq(pdev, 1);
2040         }
2041         if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) {
2042                 dev_err(&pdev->dev, "invalid interrupts\n");
2043                 ret = -EINVAL;
2044                 goto err_free_netdev;
2045         }
2046
2047         priv->base = devm_ioremap_resource(&pdev->dev, r);
2048         if (IS_ERR(priv->base)) {
2049                 ret = PTR_ERR(priv->base);
2050                 goto err_free_netdev;
2051         }
2052
2053         priv->netdev = dev;
2054         priv->pdev = pdev;
2055
2056         priv->phy_interface = of_get_phy_mode(dn);
2057         /* Default to GMII interface mode */
2058         if (priv->phy_interface < 0)
2059                 priv->phy_interface = PHY_INTERFACE_MODE_GMII;
2060
2061         /* In the case of a fixed PHY, the DT node associated
2062          * to the PHY is the Ethernet MAC DT node.
2063          */
2064         if (of_phy_is_fixed_link(dn)) {
2065                 ret = of_phy_register_fixed_link(dn);
2066                 if (ret) {
2067                         dev_err(&pdev->dev, "failed to register fixed PHY\n");
2068                         goto err_free_netdev;
2069                 }
2070
2071                 priv->phy_dn = dn;
2072         }
2073
2074         /* Initialize netdevice members */
2075         macaddr = of_get_mac_address(dn);
2076         if (!macaddr || !is_valid_ether_addr(macaddr)) {
2077                 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
2078                 eth_hw_addr_random(dev);
2079         } else {
2080                 ether_addr_copy(dev->dev_addr, macaddr);
2081         }
2082
2083         SET_NETDEV_DEV(dev, &pdev->dev);
2084         dev_set_drvdata(&pdev->dev, dev);
2085         dev->ethtool_ops = &bcm_sysport_ethtool_ops;
2086         dev->netdev_ops = &bcm_sysport_netdev_ops;
2087         netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64);
2088
2089         /* HW supported features, none enabled by default */
2090         dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
2091                                 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2092
2093         /* Request the WOL interrupt and advertise suspend if available */
2094         priv->wol_irq_disabled = 1;
2095         ret = devm_request_irq(&pdev->dev, priv->wol_irq,
2096                                bcm_sysport_wol_isr, 0, dev->name, priv);
2097         if (!ret)
2098                 device_set_wakeup_capable(&pdev->dev, 1);
2099
2100         /* Set the needed headroom once and for all */
2101         BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
2102         dev->needed_headroom += sizeof(struct bcm_tsb);
2103
2104         /* libphy will adjust the link state accordingly */
2105         netif_carrier_off(dev);
2106
2107         ret = register_netdev(dev);
2108         if (ret) {
2109                 dev_err(&pdev->dev, "failed to register net_device\n");
2110                 goto err_deregister_fixed_link;
2111         }
2112
2113         priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
2114         dev_info(&pdev->dev,
2115                  "Broadcom SYSTEMPORT%s" REV_FMT
2116                  " at 0x%p (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
2117                  priv->is_lite ? " Lite" : "",
2118                  (priv->rev >> 8) & 0xff, priv->rev & 0xff,
2119                  priv->base, priv->irq0, priv->irq1, txq, rxq);
2120
2121         return 0;
2122
2123 err_deregister_fixed_link:
2124         if (of_phy_is_fixed_link(dn))
2125                 of_phy_deregister_fixed_link(dn);
2126 err_free_netdev:
2127         free_netdev(dev);
2128         return ret;
2129 }
2130
2131 static int bcm_sysport_remove(struct platform_device *pdev)
2132 {
2133         struct net_device *dev = dev_get_drvdata(&pdev->dev);
2134         struct device_node *dn = pdev->dev.of_node;
2135
2136         /* Not much to do, ndo_close has been called
2137          * and we use managed allocations
2138          */
2139         unregister_netdev(dev);
2140         if (of_phy_is_fixed_link(dn))
2141                 of_phy_deregister_fixed_link(dn);
2142         free_netdev(dev);
2143         dev_set_drvdata(&pdev->dev, NULL);
2144
2145         return 0;
2146 }
2147
2148 #ifdef CONFIG_PM_SLEEP
2149 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
2150 {
2151         struct net_device *ndev = priv->netdev;
2152         unsigned int timeout = 1000;
2153         u32 reg;
2154
2155         /* Password has already been programmed */
2156         reg = umac_readl(priv, UMAC_MPD_CTRL);
2157         reg |= MPD_EN;
2158         reg &= ~PSW_EN;
2159         if (priv->wolopts & WAKE_MAGICSECURE)
2160                 reg |= PSW_EN;
2161         umac_writel(priv, reg, UMAC_MPD_CTRL);
2162
2163         /* Make sure RBUF entered WoL mode as result */
2164         do {
2165                 reg = rbuf_readl(priv, RBUF_STATUS);
2166                 if (reg & RBUF_WOL_MODE)
2167                         break;
2168
2169                 udelay(10);
2170         } while (timeout-- > 0);
2171
2172         /* Do not leave the UniMAC RBUF matching only MPD packets */
2173         if (!timeout) {
2174                 reg = umac_readl(priv, UMAC_MPD_CTRL);
2175                 reg &= ~MPD_EN;
2176                 umac_writel(priv, reg, UMAC_MPD_CTRL);
2177                 netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
2178                 return -ETIMEDOUT;
2179         }
2180
2181         /* UniMAC receive needs to be turned on */
2182         umac_enable_set(priv, CMD_RX_EN, 1);
2183
2184         /* Enable the interrupt wake-up source */
2185         intrl2_0_mask_clear(priv, INTRL2_0_MPD);
2186
2187         netif_dbg(priv, wol, ndev, "entered WOL mode\n");
2188
2189         return 0;
2190 }
2191
2192 static int bcm_sysport_suspend(struct device *d)
2193 {
2194         struct net_device *dev = dev_get_drvdata(d);
2195         struct bcm_sysport_priv *priv = netdev_priv(dev);
2196         unsigned int i;
2197         int ret = 0;
2198         u32 reg;
2199
2200         if (!netif_running(dev))
2201                 return 0;
2202
2203         bcm_sysport_netif_stop(dev);
2204
2205         phy_suspend(dev->phydev);
2206
2207         netif_device_detach(dev);
2208
2209         /* Disable UniMAC RX */
2210         umac_enable_set(priv, CMD_RX_EN, 0);
2211
2212         ret = rdma_enable_set(priv, 0);
2213         if (ret) {
2214                 netdev_err(dev, "RDMA timeout!\n");
2215                 return ret;
2216         }
2217
2218         /* Disable RXCHK if enabled */
2219         if (priv->rx_chk_en) {
2220                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2221                 reg &= ~RXCHK_EN;
2222                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2223         }
2224
2225         /* Flush RX pipe */
2226         if (!priv->wolopts)
2227                 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
2228
2229         ret = tdma_enable_set(priv, 0);
2230         if (ret) {
2231                 netdev_err(dev, "TDMA timeout!\n");
2232                 return ret;
2233         }
2234
2235         /* Wait for a packet boundary */
2236         usleep_range(2000, 3000);
2237
2238         umac_enable_set(priv, CMD_TX_EN, 0);
2239
2240         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
2241
2242         /* Free RX/TX rings SW structures */
2243         for (i = 0; i < dev->num_tx_queues; i++)
2244                 bcm_sysport_fini_tx_ring(priv, i);
2245         bcm_sysport_fini_rx_ring(priv);
2246
2247         /* Get prepared for Wake-on-LAN */
2248         if (device_may_wakeup(d) && priv->wolopts)
2249                 ret = bcm_sysport_suspend_to_wol(priv);
2250
2251         return ret;
2252 }
2253
2254 static int bcm_sysport_resume(struct device *d)
2255 {
2256         struct net_device *dev = dev_get_drvdata(d);
2257         struct bcm_sysport_priv *priv = netdev_priv(dev);
2258         unsigned int i;
2259         u32 reg;
2260         int ret;
2261
2262         if (!netif_running(dev))
2263                 return 0;
2264
2265         umac_reset(priv);
2266
2267         /* We may have been suspended and never received a WOL event that
2268          * would turn off MPD detection, take care of that now
2269          */
2270         bcm_sysport_resume_from_wol(priv);
2271
2272         /* Initialize both hardware and software ring */
2273         for (i = 0; i < dev->num_tx_queues; i++) {
2274                 ret = bcm_sysport_init_tx_ring(priv, i);
2275                 if (ret) {
2276                         netdev_err(dev, "failed to initialize TX ring %d\n",
2277                                    i);
2278                         goto out_free_tx_rings;
2279                 }
2280         }
2281
2282         /* Initialize linked-list */
2283         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2284
2285         /* Initialize RX ring */
2286         ret = bcm_sysport_init_rx_ring(priv);
2287         if (ret) {
2288                 netdev_err(dev, "failed to initialize RX ring\n");
2289                 goto out_free_rx_ring;
2290         }
2291
2292         netif_device_attach(dev);
2293
2294         /* RX pipe enable */
2295         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2296
2297         ret = rdma_enable_set(priv, 1);
2298         if (ret) {
2299                 netdev_err(dev, "failed to enable RDMA\n");
2300                 goto out_free_rx_ring;
2301         }
2302
2303         /* Enable rxhck */
2304         if (priv->rx_chk_en) {
2305                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2306                 reg |= RXCHK_EN;
2307                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2308         }
2309
2310         rbuf_init(priv);
2311
2312         /* Set maximum frame length */
2313         if (!priv->is_lite)
2314                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2315         else
2316                 gib_set_pad_extension(priv);
2317
2318         /* Set MAC address */
2319         umac_set_hw_addr(priv, dev->dev_addr);
2320
2321         umac_enable_set(priv, CMD_RX_EN, 1);
2322
2323         /* TX pipe enable */
2324         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2325
2326         umac_enable_set(priv, CMD_TX_EN, 1);
2327
2328         ret = tdma_enable_set(priv, 1);
2329         if (ret) {
2330                 netdev_err(dev, "TDMA timeout!\n");
2331                 goto out_free_rx_ring;
2332         }
2333
2334         phy_resume(dev->phydev);
2335
2336         bcm_sysport_netif_start(dev);
2337
2338         return 0;
2339
2340 out_free_rx_ring:
2341         bcm_sysport_fini_rx_ring(priv);
2342 out_free_tx_rings:
2343         for (i = 0; i < dev->num_tx_queues; i++)
2344                 bcm_sysport_fini_tx_ring(priv, i);
2345         return ret;
2346 }
2347 #endif
2348
2349 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2350                 bcm_sysport_suspend, bcm_sysport_resume);
2351
2352 static struct platform_driver bcm_sysport_driver = {
2353         .probe  = bcm_sysport_probe,
2354         .remove = bcm_sysport_remove,
2355         .driver =  {
2356                 .name = "brcm-systemport",
2357                 .of_match_table = bcm_sysport_of_match,
2358                 .pm = &bcm_sysport_pm_ops,
2359         },
2360 };
2361 module_platform_driver(bcm_sysport_driver);
2362
2363 MODULE_AUTHOR("Broadcom Corporation");
2364 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2365 MODULE_ALIAS("platform:brcm-systemport");
2366 MODULE_LICENSE("GPL");