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                 p += s->stat_offset;
 453                 data[j] = *(unsigned long *)p;
 454                 j++;
 455         }
 456
 457         /* For SYSTEMPORT Lite since we have holes in our statistics, j would
 458          * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it
 459          * needs to point to how many total statistics we have minus the
 460          * number of per TX queue statistics
 461          */
 462         j = bcm_sysport_get_sset_count(dev, ETH_SS_STATS) -
 463             dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
 464
 465         for (i = 0; i < dev->num_tx_queues; i++) {
 466                 ring = &priv->tx_rings[i];
 467                 data[j] = ring->packets;
 468                 j++;
 469                 data[j] = ring->bytes;
 470                 j++;
 471         }
 472 }
 473
 474 static void bcm_sysport_get_wol(struct net_device *dev,
 475                                 struct ethtool_wolinfo *wol)
 476 {
 477         struct bcm_sysport_priv *priv = netdev_priv(dev);
 478         u32 reg;
 479
 480         wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE;
 481         wol->wolopts = priv->wolopts;
 482
 483         if (!(priv->wolopts & WAKE_MAGICSECURE))
 484                 return;
 485
 486         /* Return the programmed SecureOn password */
 487         reg = umac_readl(priv, UMAC_PSW_MS);
 488         put_unaligned_be16(reg, &wol->sopass[0]);
 489         reg = umac_readl(priv, UMAC_PSW_LS);
 490         put_unaligned_be32(reg, &wol->sopass[2]);
 491 }
 492
 493 static int bcm_sysport_set_wol(struct net_device *dev,
 494                                struct ethtool_wolinfo *wol)
 495 {
 496         struct bcm_sysport_priv *priv = netdev_priv(dev);
 497         struct device *kdev = &priv->pdev->dev;
 498         u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE;
 499
 500         if (!device_can_wakeup(kdev))
 501                 return -ENOTSUPP;
 502
 503         if (wol->wolopts & ~supported)
 504                 return -EINVAL;
 505
 506         /* Program the SecureOn password */
 507         if (wol->wolopts & WAKE_MAGICSECURE) {
 508                 umac_writel(priv, get_unaligned_be16(&wol->sopass[0]),
 509                             UMAC_PSW_MS);
 510                 umac_writel(priv, get_unaligned_be32(&wol->sopass[2]),
 511                             UMAC_PSW_LS);
 512         }
 513
 514         /* Flag the device and relevant IRQ as wakeup capable */
 515         if (wol->wolopts) {
 516                 device_set_wakeup_enable(kdev, 1);
 517                 if (priv->wol_irq_disabled)
 518                         enable_irq_wake(priv->wol_irq);
 519                 priv->wol_irq_disabled = 0;
 520         } else {
 521                 device_set_wakeup_enable(kdev, 0);
 522                 /* Avoid unbalanced disable_irq_wake calls */
 523                 if (!priv->wol_irq_disabled)
 524                         disable_irq_wake(priv->wol_irq);
 525                 priv->wol_irq_disabled = 1;
 526         }
 527
 528         priv->wolopts = wol->wolopts;
 529
 530         return 0;
 531 }
 532
 533 static int bcm_sysport_get_coalesce(struct net_device *dev,
 534                                     struct ethtool_coalesce *ec)
 535 {
 536         struct bcm_sysport_priv *priv = netdev_priv(dev);
 537         u32 reg;
 538
 539         reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0));
 540
 541         ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000;
 542         ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK;
 543
 544         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 545
 546         ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000;
 547         ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK;
 548
 549         return 0;
 550 }
 551
 552 static int bcm_sysport_set_coalesce(struct net_device *dev,
 553                                     struct ethtool_coalesce *ec)
 554 {
 555         struct bcm_sysport_priv *priv = netdev_priv(dev);
 556         unsigned int i;
 557         u32 reg;
 558
 559         /* Base system clock is 125Mhz, DMA timeout is this reference clock
 560          * divided by 1024, which yield roughly 8.192 us, our maximum value has
 561          * to fit in the RING_TIMEOUT_MASK (16 bits).
 562          */
 563         if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
 564             ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
 565             ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
 566             ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
 567                 return -EINVAL;
 568
 569         if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
 570             (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0))
 571                 return -EINVAL;
 572
 573         for (i = 0; i < dev->num_tx_queues; i++) {
 574                 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(i));
 575                 reg &= ~(RING_INTR_THRESH_MASK |
 576                          RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT);
 577                 reg |= ec->tx_max_coalesced_frames;
 578                 reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) <<
 579                          RING_TIMEOUT_SHIFT;
 580                 tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(i));
 581         }
 582
 583         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 584         reg &= ~(RDMA_INTR_THRESH_MASK |
 585                  RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT);
 586         reg |= ec->rx_max_coalesced_frames;
 587         reg |= DIV_ROUND_UP(ec->rx_coalesce_usecs * 1000, 8192) <<
 588                             RDMA_TIMEOUT_SHIFT;
 589         rdma_writel(priv, reg, RDMA_MBDONE_INTR);
 590
 591         return 0;
 592 }
 593
 594 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
 595 {
 596         dev_kfree_skb_any(cb->skb);
 597         cb->skb = NULL;
 598         dma_unmap_addr_set(cb, dma_addr, 0);
 599 }
 600
 601 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
 602                                              struct bcm_sysport_cb *cb)
 603 {
 604         struct device *kdev = &priv->pdev->dev;
 605         struct net_device *ndev = priv->netdev;
 606         struct sk_buff *skb, *rx_skb;
 607         dma_addr_t mapping;
 608
 609         /* Allocate a new SKB for a new packet */
 610         skb = netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH);
 611         if (!skb) {
 612                 priv->mib.alloc_rx_buff_failed++;
 613                 netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
 614                 return NULL;
 615         }
 616
 617         mapping = dma_map_single(kdev, skb->data,
 618                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 619         if (dma_mapping_error(kdev, mapping)) {
 620                 priv->mib.rx_dma_failed++;
 621                 dev_kfree_skb_any(skb);
 622                 netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
 623                 return NULL;
 624         }
 625
 626         /* Grab the current SKB on the ring */
 627         rx_skb = cb->skb;
 628         if (likely(rx_skb))
 629                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 630                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 631
 632         /* Put the new SKB on the ring */
 633         cb->skb = skb;
 634         dma_unmap_addr_set(cb, dma_addr, mapping);
 635         dma_desc_set_addr(priv, cb->bd_addr, mapping);
 636
 637         netif_dbg(priv, rx_status, ndev, "RX refill\n");
 638
 639         /* Return the current SKB to the caller */
 640         return rx_skb;
 641 }
 642
 643 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
 644 {
 645         struct bcm_sysport_cb *cb;
 646         struct sk_buff *skb;
 647         unsigned int i;
 648
 649         for (i = 0; i < priv->num_rx_bds; i++) {
 650                 cb = &priv->rx_cbs[i];
 651                 skb = bcm_sysport_rx_refill(priv, cb);
 652                 if (skb)
 653                         dev_kfree_skb(skb);
 654                 if (!cb->skb)
 655                         return -ENOMEM;
 656         }
 657
 658         return 0;
 659 }
 660
 661 /* Poll the hardware for up to budget packets to process */
 662 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
 663                                         unsigned int budget)
 664 {
 665         struct net_device *ndev = priv->netdev;
 666         unsigned int processed = 0, to_process;
 667         struct bcm_sysport_cb *cb;
 668         struct sk_buff *skb;
 669         unsigned int p_index;
 670         u16 len, status;
 671         struct bcm_rsb *rsb;
 672
 673         /* Clear status before servicing to reduce spurious interrupts */
 674         intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR);
 675
 676         /* Determine how much we should process since last call, SYSTEMPORT Lite
 677          * groups the producer and consumer indexes into the same 32-bit
 678          * which we access using RDMA_CONS_INDEX
 679          */
 680         if (!priv->is_lite)
 681                 p_index = rdma_readl(priv, RDMA_PROD_INDEX);
 682         else
 683                 p_index = rdma_readl(priv, RDMA_CONS_INDEX);
 684         p_index &= RDMA_PROD_INDEX_MASK;
 685
 686         to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK;
 687
 688         netif_dbg(priv, rx_status, ndev,
 689                   "p_index=%d rx_c_index=%d to_process=%d\n",
 690                   p_index, priv->rx_c_index, to_process);
 691
 692         while ((processed < to_process) && (processed < budget)) {
 693                 cb = &priv->rx_cbs[priv->rx_read_ptr];
 694                 skb = bcm_sysport_rx_refill(priv, cb);
 695
 696
 697                 /* We do not have a backing SKB, so we do not a corresponding
 698                  * DMA mapping for this incoming packet since
 699                  * bcm_sysport_rx_refill always either has both skb and mapping
 700                  * or none.
 701                  */
 702                 if (unlikely(!skb)) {
 703                         netif_err(priv, rx_err, ndev, "out of memory!\n");
 704                         ndev->stats.rx_dropped++;
 705                         ndev->stats.rx_errors++;
 706                         goto next;
 707                 }
 708
 709                 /* Extract the Receive Status Block prepended */
 710                 rsb = (struct bcm_rsb *)skb->data;
 711                 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
 712                 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
 713                           DESC_STATUS_MASK;
 714
 715                 netif_dbg(priv, rx_status, ndev,
 716                           "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
 717                           p_index, priv->rx_c_index, priv->rx_read_ptr,
 718                           len, status);
 719
 720                 if (unlikely(len > RX_BUF_LENGTH)) {
 721                         netif_err(priv, rx_status, ndev, "oversized packet\n");
 722                         ndev->stats.rx_length_errors++;
 723                         ndev->stats.rx_errors++;
 724                         dev_kfree_skb_any(skb);
 725                         goto next;
 726                 }
 727
 728                 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
 729                         netif_err(priv, rx_status, ndev, "fragmented packet!\n");
 730                         ndev->stats.rx_dropped++;
 731                         ndev->stats.rx_errors++;
 732                         dev_kfree_skb_any(skb);
 733                         goto next;
 734                 }
 735
 736                 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
 737                         netif_err(priv, rx_err, ndev, "error packet\n");
 738                         if (status & RX_STATUS_OVFLOW)
 739                                 ndev->stats.rx_over_errors++;
 740                         ndev->stats.rx_dropped++;
 741                         ndev->stats.rx_errors++;
 742                         dev_kfree_skb_any(skb);
 743                         goto next;
 744                 }
 745
 746                 skb_put(skb, len);
 747
 748                 /* Hardware validated our checksum */
 749                 if (likely(status & DESC_L4_CSUM))
 750                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 751
 752                 /* Hardware pre-pends packets with 2bytes before Ethernet
 753                  * header plus we have the Receive Status Block, strip off all
 754                  * of this from the SKB.
 755                  */
 756                 skb_pull(skb, sizeof(*rsb) + 2);
 757                 len -= (sizeof(*rsb) + 2);
 758
 759                 /* UniMAC may forward CRC */
 760                 if (priv->crc_fwd) {
 761                         skb_trim(skb, len - ETH_FCS_LEN);
 762                         len -= ETH_FCS_LEN;
 763                 }
 764
 765                 skb->protocol = eth_type_trans(skb, ndev);
 766                 ndev->stats.rx_packets++;
 767                 ndev->stats.rx_bytes += len;
 768
 769                 napi_gro_receive(&priv->napi, skb);
 770 next:
 771                 processed++;
 772                 priv->rx_read_ptr++;
 773
 774                 if (priv->rx_read_ptr == priv->num_rx_bds)
 775                         priv->rx_read_ptr = 0;
 776         }
 777
 778         return processed;
 779 }
 780
 781 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring,
 782                                        struct bcm_sysport_cb *cb,
 783                                        unsigned int *bytes_compl,
 784                                        unsigned int *pkts_compl)
 785 {
 786         struct bcm_sysport_priv *priv = ring->priv;
 787         struct device *kdev = &priv->pdev->dev;
 788
 789         if (cb->skb) {
 790                 ring->bytes += cb->skb->len;
 791                 *bytes_compl += cb->skb->len;
 792                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 793                                  dma_unmap_len(cb, dma_len),
 794                                  DMA_TO_DEVICE);
 795                 ring->packets++;
 796                 (*pkts_compl)++;
 797                 bcm_sysport_free_cb(cb);
 798         /* SKB fragment */
 799         } else if (dma_unmap_addr(cb, dma_addr)) {
 800                 ring->bytes += dma_unmap_len(cb, dma_len);
 801                 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
 802                                dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
 803                 dma_unmap_addr_set(cb, dma_addr, 0);
 804         }
 805 }
 806
 807 /* Reclaim queued SKBs for transmission completion, lockless version */
 808 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 809                                              struct bcm_sysport_tx_ring *ring)
 810 {
 811         struct net_device *ndev = priv->netdev;
 812         unsigned int c_index, last_c_index, last_tx_cn, num_tx_cbs;
 813         unsigned int pkts_compl = 0, bytes_compl = 0;
 814         struct bcm_sysport_cb *cb;
 815         u32 hw_ind;
 816
 817         /* Clear status before servicing to reduce spurious interrupts */
 818         if (!ring->priv->is_lite)
 819                 intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR);
 820         else
 821                 intrl2_0_writel(ring->priv, BIT(ring->index +
 822                                 INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR);
 823
 824         /* Compute how many descriptors have been processed since last call */
 825         hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
 826         c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
 827         ring->p_index = (hw_ind & RING_PROD_INDEX_MASK);
 828
 829         last_c_index = ring->c_index;
 830         num_tx_cbs = ring->size;
 831
 832         c_index &= (num_tx_cbs - 1);
 833
 834         if (c_index >= last_c_index)
 835                 last_tx_cn = c_index - last_c_index;
 836         else
 837                 last_tx_cn = num_tx_cbs - last_c_index + c_index;
 838
 839         netif_dbg(priv, tx_done, ndev,
 840                   "ring=%d c_index=%d last_tx_cn=%d last_c_index=%d\n",
 841                   ring->index, c_index, last_tx_cn, last_c_index);
 842
 843         while (last_tx_cn-- > 0) {
 844                 cb = ring->cbs + last_c_index;
 845                 bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl);
 846
 847                 ring->desc_count++;
 848                 last_c_index++;
 849                 last_c_index &= (num_tx_cbs - 1);
 850         }
 851
 852         ring->c_index = c_index;
 853
 854         netif_dbg(priv, tx_done, ndev,
 855                   "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
 856                   ring->index, ring->c_index, pkts_compl, bytes_compl);
 857
 858         return pkts_compl;
 859 }
 860
 861 /* Locked version of the per-ring TX reclaim routine */
 862 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 863                                            struct bcm_sysport_tx_ring *ring)
 864 {
 865         struct netdev_queue *txq;
 866         unsigned int released;
 867         unsigned long flags;
 868
 869         txq = netdev_get_tx_queue(priv->netdev, ring->index);
 870
 871         spin_lock_irqsave(&ring->lock, flags);
 872         released = __bcm_sysport_tx_reclaim(priv, ring);
 873         if (released)
 874                 netif_tx_wake_queue(txq);
 875
 876         spin_unlock_irqrestore(&ring->lock, flags);
 877
 878         return released;
 879 }
 880
 881 /* Locked version of the per-ring TX reclaim, but does not wake the queue */
 882 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv,
 883                                  struct bcm_sysport_tx_ring *ring)
 884 {
 885         unsigned long flags;
 886
 887         spin_lock_irqsave(&ring->lock, flags);
 888         __bcm_sysport_tx_reclaim(priv, ring);
 889         spin_unlock_irqrestore(&ring->lock, flags);
 890 }
 891
 892 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
 893 {
 894         struct bcm_sysport_tx_ring *ring =
 895                 container_of(napi, struct bcm_sysport_tx_ring, napi);
 896         unsigned int work_done = 0;
 897
 898         work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
 899
 900         if (work_done == 0) {
 901                 napi_complete(napi);
 902                 /* re-enable TX interrupt */
 903                 if (!ring->priv->is_lite)
 904                         intrl2_1_mask_clear(ring->priv, BIT(ring->index));
 905                 else
 906                         intrl2_0_mask_clear(ring->priv, BIT(ring->index +
 907                                             INTRL2_0_TDMA_MBDONE_SHIFT));
 908
 909                 return 0;
 910         }
 911
 912         return budget;
 913 }
 914
 915 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
 916 {
 917         unsigned int q;
 918
 919         for (q = 0; q < priv->netdev->num_tx_queues; q++)
 920                 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
 921 }
 922
 923 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
 924 {
 925         struct bcm_sysport_priv *priv =
 926                 container_of(napi, struct bcm_sysport_priv, napi);
 927         unsigned int work_done = 0;
 928
 929         work_done = bcm_sysport_desc_rx(priv, budget);
 930
 931         priv->rx_c_index += work_done;
 932         priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
 933
 934         /* SYSTEMPORT Lite groups the producer/consumer index, producer is
 935          * maintained by HW, but writes to it will be ignore while RDMA
 936          * is active
 937          */
 938         if (!priv->is_lite)
 939                 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
 940         else
 941                 rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX);
 942
 943         if (work_done < budget) {
 944                 napi_complete_done(napi, work_done);
 945                 /* re-enable RX interrupts */
 946                 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
 947         }
 948
 949         return work_done;
 950 }
 951
 952 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
 953 {
 954         u32 reg;
 955
 956         /* Stop monitoring MPD interrupt */
 957         intrl2_0_mask_set(priv, INTRL2_0_MPD);
 958
 959         /* Clear the MagicPacket detection logic */
 960         reg = umac_readl(priv, UMAC_MPD_CTRL);
 961         reg &= ~MPD_EN;
 962         umac_writel(priv, reg, UMAC_MPD_CTRL);
 963
 964         netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
 965 }
 966
 967 /* RX and misc interrupt routine */
 968 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
 969 {
 970         struct net_device *dev = dev_id;
 971         struct bcm_sysport_priv *priv = netdev_priv(dev);
 972         struct bcm_sysport_tx_ring *txr;
 973         unsigned int ring, ring_bit;
 974
 975         priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
 976                           ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
 977         intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
 978
 979         if (unlikely(priv->irq0_stat == 0)) {
 980                 netdev_warn(priv->netdev, "spurious RX interrupt\n");
 981                 return IRQ_NONE;
 982         }
 983
 984         if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
 985                 if (likely(napi_schedule_prep(&priv->napi))) {
 986                         /* disable RX interrupts */
 987                         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
 988                         __napi_schedule_irqoff(&priv->napi);
 989                 }
 990         }
 991
 992         /* TX ring is full, perform a full reclaim since we do not know
 993          * which one would trigger this interrupt
 994          */
 995         if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
 996                 bcm_sysport_tx_reclaim_all(priv);
 997
 998         if (priv->irq0_stat & INTRL2_0_MPD) {
 999                 netdev_info(priv->netdev, "Wake-on-LAN interrupt!\n");
1000                 bcm_sysport_resume_from_wol(priv);
1001         }
1002
1003         if (!priv->is_lite)
1004                 goto out;
1005
1006         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1007                 ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT);
1008                 if (!(priv->irq0_stat & ring_bit))
1009                         continue;
1010
1011                 txr = &priv->tx_rings[ring];
1012
1013                 if (likely(napi_schedule_prep(&txr->napi))) {
1014                         intrl2_0_mask_set(priv, ring_bit);
1015                         __napi_schedule(&txr->napi);
1016                 }
1017         }
1018 out:
1019         return IRQ_HANDLED;
1020 }
1021
1022 /* TX interrupt service routine */
1023 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
1024 {
1025         struct net_device *dev = dev_id;
1026         struct bcm_sysport_priv *priv = netdev_priv(dev);
1027         struct bcm_sysport_tx_ring *txr;
1028         unsigned int ring;
1029
1030         priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
1031                                 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
1032         intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1033
1034         if (unlikely(priv->irq1_stat == 0)) {
1035                 netdev_warn(priv->netdev, "spurious TX interrupt\n");
1036                 return IRQ_NONE;
1037         }
1038
1039         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1040                 if (!(priv->irq1_stat & BIT(ring)))
1041                         continue;
1042
1043                 txr = &priv->tx_rings[ring];
1044
1045                 if (likely(napi_schedule_prep(&txr->napi))) {
1046                         intrl2_1_mask_set(priv, BIT(ring));
1047                         __napi_schedule_irqoff(&txr->napi);
1048                 }
1049         }
1050
1051         return IRQ_HANDLED;
1052 }
1053
1054 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
1055 {
1056         struct bcm_sysport_priv *priv = dev_id;
1057
1058         pm_wakeup_event(&priv->pdev->dev, 0);
1059
1060         return IRQ_HANDLED;
1061 }
1062
1063 #ifdef CONFIG_NET_POLL_CONTROLLER
1064 static void bcm_sysport_poll_controller(struct net_device *dev)
1065 {
1066         struct bcm_sysport_priv *priv = netdev_priv(dev);
1067
1068         disable_irq(priv->irq0);
1069         bcm_sysport_rx_isr(priv->irq0, priv);
1070         enable_irq(priv->irq0);
1071
1072         if (!priv->is_lite) {
1073                 disable_irq(priv->irq1);
1074                 bcm_sysport_tx_isr(priv->irq1, priv);
1075                 enable_irq(priv->irq1);
1076         }
1077 }
1078 #endif
1079
1080 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
1081                                               struct net_device *dev)
1082 {
1083         struct sk_buff *nskb;
1084         struct bcm_tsb *tsb;
1085         u32 csum_info;
1086         u8 ip_proto;
1087         u16 csum_start;
1088         u16 ip_ver;
1089
1090         /* Re-allocate SKB if needed */
1091         if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
1092                 nskb = skb_realloc_headroom(skb, sizeof(*tsb));
1093                 dev_kfree_skb(skb);
1094                 if (!nskb) {
1095                         dev->stats.tx_errors++;
1096                         dev->stats.tx_dropped++;
1097                         return NULL;
1098                 }
1099                 skb = nskb;
1100         }
1101
1102         tsb = skb_push(skb, sizeof(*tsb));
1103         /* Zero-out TSB by default */
1104         memset(tsb, 0, sizeof(*tsb));
1105
1106         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1107                 ip_ver = htons(skb->protocol);
1108                 switch (ip_ver) {
1109                 case ETH_P_IP:
1110                         ip_proto = ip_hdr(skb)->protocol;
1111                         break;
1112                 case ETH_P_IPV6:
1113                         ip_proto = ipv6_hdr(skb)->nexthdr;
1114                         break;
1115                 default:
1116                         return skb;
1117                 }
1118
1119                 /* Get the checksum offset and the L4 (transport) offset */
1120                 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
1121                 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
1122                 csum_info |= (csum_start << L4_PTR_SHIFT);
1123
1124                 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1125                         csum_info |= L4_LENGTH_VALID;
1126                         if (ip_proto == IPPROTO_UDP && ip_ver == ETH_P_IP)
1127                                 csum_info |= L4_UDP;
1128                 } else {
1129                         csum_info = 0;
1130                 }
1131
1132                 tsb->l4_ptr_dest_map = csum_info;
1133         }
1134
1135         return skb;
1136 }
1137
1138 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
1139                                     struct net_device *dev)
1140 {
1141         struct bcm_sysport_priv *priv = netdev_priv(dev);
1142         struct device *kdev = &priv->pdev->dev;
1143         struct bcm_sysport_tx_ring *ring;
1144         struct bcm_sysport_cb *cb;
1145         struct netdev_queue *txq;
1146         struct dma_desc *desc;
1147         unsigned int skb_len;
1148         unsigned long flags;
1149         dma_addr_t mapping;
1150         u32 len_status;
1151         u16 queue;
1152         int ret;
1153
1154         queue = skb_get_queue_mapping(skb);
1155         txq = netdev_get_tx_queue(dev, queue);
1156         ring = &priv->tx_rings[queue];
1157
1158         /* lock against tx reclaim in BH context and TX ring full interrupt */
1159         spin_lock_irqsave(&ring->lock, flags);
1160         if (unlikely(ring->desc_count == 0)) {
1161                 netif_tx_stop_queue(txq);
1162                 netdev_err(dev, "queue %d awake and ring full!\n", queue);
1163                 ret = NETDEV_TX_BUSY;
1164                 goto out;
1165         }
1166
1167         /* The Ethernet switch we are interfaced with needs packets to be at
1168          * least 64 bytes (including FCS) otherwise they will be discarded when
1169          * they enter the switch port logic. When Broadcom tags are enabled, we
1170          * need to make sure that packets are at least 68 bytes
1171          * (including FCS and tag) because the length verification is done after
1172          * the Broadcom tag is stripped off the ingress packet.
1173          */
1174         if (skb_put_padto(skb, ETH_ZLEN + ENET_BRCM_TAG_LEN)) {
1175                 ret = NETDEV_TX_OK;
1176                 goto out;
1177         }
1178
1179         /* Insert TSB and checksum infos */
1180         if (priv->tsb_en) {
1181                 skb = bcm_sysport_insert_tsb(skb, dev);
1182                 if (!skb) {
1183                         ret = NETDEV_TX_OK;
1184                         goto out;
1185                 }
1186         }
1187
1188         skb_len = skb->len;
1189
1190         mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1191         if (dma_mapping_error(kdev, mapping)) {
1192                 priv->mib.tx_dma_failed++;
1193                 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
1194                           skb->data, skb_len);
1195                 ret = NETDEV_TX_OK;
1196                 goto out;
1197         }
1198
1199         /* Remember the SKB for future freeing */
1200         cb = &ring->cbs[ring->curr_desc];
1201         cb->skb = skb;
1202         dma_unmap_addr_set(cb, dma_addr, mapping);
1203         dma_unmap_len_set(cb, dma_len, skb_len);
1204
1205         /* Fetch a descriptor entry from our pool */
1206         desc = ring->desc_cpu;
1207
1208         desc->addr_lo = lower_32_bits(mapping);
1209         len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
1210         len_status |= (skb_len << DESC_LEN_SHIFT);
1211         len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
1212                        DESC_STATUS_SHIFT;
1213         if (skb->ip_summed == CHECKSUM_PARTIAL)
1214                 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1215
1216         ring->curr_desc++;
1217         if (ring->curr_desc == ring->size)
1218                 ring->curr_desc = 0;
1219         ring->desc_count--;
1220
1221         /* Ensure write completion of the descriptor status/length
1222          * in DRAM before the System Port WRITE_PORT register latches
1223          * the value
1224          */
1225         wmb();
1226         desc->addr_status_len = len_status;
1227         wmb();
1228
1229         /* Write this descriptor address to the RING write port */
1230         tdma_port_write_desc_addr(priv, desc, ring->index);
1231
1232         /* Check ring space and update SW control flow */
1233         if (ring->desc_count == 0)
1234                 netif_tx_stop_queue(txq);
1235
1236         netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
1237                   ring->index, ring->desc_count, ring->curr_desc);
1238
1239         ret = NETDEV_TX_OK;
1240 out:
1241         spin_unlock_irqrestore(&ring->lock, flags);
1242         return ret;
1243 }
1244
1245 static void bcm_sysport_tx_timeout(struct net_device *dev)
1246 {
1247         netdev_warn(dev, "transmit timeout!\n");
1248
1249         netif_trans_update(dev);
1250         dev->stats.tx_errors++;
1251
1252         netif_tx_wake_all_queues(dev);
1253 }
1254
1255 /* phylib adjust link callback */
1256 static void bcm_sysport_adj_link(struct net_device *dev)
1257 {
1258         struct bcm_sysport_priv *priv = netdev_priv(dev);
1259         struct phy_device *phydev = dev->phydev;
1260         unsigned int changed = 0;
1261         u32 cmd_bits = 0, reg;
1262
1263         if (priv->old_link != phydev->link) {
1264                 changed = 1;
1265                 priv->old_link = phydev->link;
1266         }
1267
1268         if (priv->old_duplex != phydev->duplex) {
1269                 changed = 1;
1270                 priv->old_duplex = phydev->duplex;
1271         }
1272
1273         if (priv->is_lite)
1274                 goto out;
1275
1276         switch (phydev->speed) {
1277         case SPEED_2500:
1278                 cmd_bits = CMD_SPEED_2500;
1279                 break;
1280         case SPEED_1000:
1281                 cmd_bits = CMD_SPEED_1000;
1282                 break;
1283         case SPEED_100:
1284                 cmd_bits = CMD_SPEED_100;
1285                 break;
1286         case SPEED_10:
1287                 cmd_bits = CMD_SPEED_10;
1288                 break;
1289         default:
1290                 break;
1291         }
1292         cmd_bits <<= CMD_SPEED_SHIFT;
1293
1294         if (phydev->duplex == DUPLEX_HALF)
1295                 cmd_bits |= CMD_HD_EN;
1296
1297         if (priv->old_pause != phydev->pause) {
1298                 changed = 1;
1299                 priv->old_pause = phydev->pause;
1300         }
1301
1302         if (!phydev->pause)
1303                 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1304
1305         if (!changed)
1306                 return;
1307
1308         if (phydev->link) {
1309                 reg = umac_readl(priv, UMAC_CMD);
1310                 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
1311                         CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1312                         CMD_TX_PAUSE_IGNORE);
1313                 reg |= cmd_bits;
1314                 umac_writel(priv, reg, UMAC_CMD);
1315         }
1316 out:
1317         if (changed)
1318                 phy_print_status(phydev);
1319 }
1320
1321 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1322                                     unsigned int index)
1323 {
1324         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1325         struct device *kdev = &priv->pdev->dev;
1326         size_t size;
1327         void *p;
1328         u32 reg;
1329
1330         /* Simple descriptors partitioning for now */
1331         size = 256;
1332
1333         /* We just need one DMA descriptor which is DMA-able, since writing to
1334          * the port will allocate a new descriptor in its internal linked-list
1335          */
1336         p = dma_zalloc_coherent(kdev, sizeof(struct dma_desc), &ring->desc_dma,
1337                                 GFP_KERNEL);
1338         if (!p) {
1339                 netif_err(priv, hw, priv->netdev, "DMA alloc failed\n");
1340                 return -ENOMEM;
1341         }
1342
1343         ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1344         if (!ring->cbs) {
1345                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1346                 return -ENOMEM;
1347         }
1348
1349         /* Initialize SW view of the ring */
1350         spin_lock_init(&ring->lock);
1351         ring->priv = priv;
1352         netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64);
1353         ring->index = index;
1354         ring->size = size;
1355         ring->alloc_size = ring->size;
1356         ring->desc_cpu = p;
1357         ring->desc_count = ring->size;
1358         ring->curr_desc = 0;
1359
1360         /* Initialize HW ring */
1361         tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1362         tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1363         tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1364         tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1365         tdma_writel(priv, RING_IGNORE_STATUS, TDMA_DESC_RING_MAPPING(index));
1366         tdma_writel(priv, 0, TDMA_DESC_RING_PCP_DEI_VID(index));
1367
1368         /* Program the number of descriptors as MAX_THRESHOLD and half of
1369          * its size for the hysteresis trigger
1370          */
1371         tdma_writel(priv, ring->size |
1372                         1 << RING_HYST_THRESH_SHIFT,
1373                         TDMA_DESC_RING_MAX_HYST(index));
1374
1375         /* Enable the ring queue in the arbiter */
1376         reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1377         reg |= (1 << index);
1378         tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1379
1380         napi_enable(&ring->napi);
1381
1382         netif_dbg(priv, hw, priv->netdev,
1383                   "TDMA cfg, size=%d, desc_cpu=%p\n",
1384                   ring->size, ring->desc_cpu);
1385
1386         return 0;
1387 }
1388
1389 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1390                                      unsigned int index)
1391 {
1392         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1393         struct device *kdev = &priv->pdev->dev;
1394         u32 reg;
1395
1396         /* Caller should stop the TDMA engine */
1397         reg = tdma_readl(priv, TDMA_STATUS);
1398         if (!(reg & TDMA_DISABLED))
1399                 netdev_warn(priv->netdev, "TDMA not stopped!\n");
1400
1401         /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1402          * fail, so by checking this pointer we know whether the TX ring was
1403          * fully initialized or not.
1404          */
1405         if (!ring->cbs)
1406                 return;
1407
1408         napi_disable(&ring->napi);
1409         netif_napi_del(&ring->napi);
1410
1411         bcm_sysport_tx_clean(priv, ring);
1412
1413         kfree(ring->cbs);
1414         ring->cbs = NULL;
1415
1416         if (ring->desc_dma) {
1417                 dma_free_coherent(kdev, sizeof(struct dma_desc),
1418                                   ring->desc_cpu, ring->desc_dma);
1419                 ring->desc_dma = 0;
1420         }
1421         ring->size = 0;
1422         ring->alloc_size = 0;
1423
1424         netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1425 }
1426
1427 /* RDMA helper */
1428 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1429                                   unsigned int enable)
1430 {
1431         unsigned int timeout = 1000;
1432         u32 reg;
1433
1434         reg = rdma_readl(priv, RDMA_CONTROL);
1435         if (enable)
1436                 reg |= RDMA_EN;
1437         else
1438                 reg &= ~RDMA_EN;
1439         rdma_writel(priv, reg, RDMA_CONTROL);
1440
1441         /* Poll for RMDA disabling completion */
1442         do {
1443                 reg = rdma_readl(priv, RDMA_STATUS);
1444                 if (!!(reg & RDMA_DISABLED) == !enable)
1445                         return 0;
1446                 usleep_range(1000, 2000);
1447         } while (timeout-- > 0);
1448
1449         netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1450
1451         return -ETIMEDOUT;
1452 }
1453
1454 /* TDMA helper */
1455 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1456                                   unsigned int enable)
1457 {
1458         unsigned int timeout = 1000;
1459         u32 reg;
1460
1461         reg = tdma_readl(priv, TDMA_CONTROL);
1462         if (enable)
1463                 reg |= tdma_control_bit(priv, TDMA_EN);
1464         else
1465                 reg &= ~tdma_control_bit(priv, TDMA_EN);
1466         tdma_writel(priv, reg, TDMA_CONTROL);
1467
1468         /* Poll for TMDA disabling completion */
1469         do {
1470                 reg = tdma_readl(priv, TDMA_STATUS);
1471                 if (!!(reg & TDMA_DISABLED) == !enable)
1472                         return 0;
1473
1474                 usleep_range(1000, 2000);
1475         } while (timeout-- > 0);
1476
1477         netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1478
1479         return -ETIMEDOUT;
1480 }
1481
1482 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1483 {
1484         struct bcm_sysport_cb *cb;
1485         u32 reg;
1486         int ret;
1487         int i;
1488
1489         /* Initialize SW view of the RX ring */
1490         priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC;
1491         priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1492         priv->rx_c_index = 0;
1493         priv->rx_read_ptr = 0;
1494         priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1495                                 GFP_KERNEL);
1496         if (!priv->rx_cbs) {
1497                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1498                 return -ENOMEM;
1499         }
1500
1501         for (i = 0; i < priv->num_rx_bds; i++) {
1502                 cb = priv->rx_cbs + i;
1503                 cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1504         }
1505
1506         ret = bcm_sysport_alloc_rx_bufs(priv);
1507         if (ret) {
1508                 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1509                 return ret;
1510         }
1511
1512         /* Initialize HW, ensure RDMA is disabled */
1513         reg = rdma_readl(priv, RDMA_STATUS);
1514         if (!(reg & RDMA_DISABLED))
1515                 rdma_enable_set(priv, 0);
1516
1517         rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1518         rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1519         rdma_writel(priv, 0, RDMA_PROD_INDEX);
1520         rdma_writel(priv, 0, RDMA_CONS_INDEX);
1521         rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1522                           RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1523         /* Operate the queue in ring mode */
1524         rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1525         rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1526         rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1527         rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO);
1528
1529         rdma_writel(priv, 1, RDMA_MBDONE_INTR);
1530
1531         netif_dbg(priv, hw, priv->netdev,
1532                   "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1533                   priv->num_rx_bds, priv->rx_bds);
1534
1535         return 0;
1536 }
1537
1538 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1539 {
1540         struct bcm_sysport_cb *cb;
1541         unsigned int i;
1542         u32 reg;
1543
1544         /* Caller should ensure RDMA is disabled */
1545         reg = rdma_readl(priv, RDMA_STATUS);
1546         if (!(reg & RDMA_DISABLED))
1547                 netdev_warn(priv->netdev, "RDMA not stopped!\n");
1548
1549         for (i = 0; i < priv->num_rx_bds; i++) {
1550                 cb = &priv->rx_cbs[i];
1551                 if (dma_unmap_addr(cb, dma_addr))
1552                         dma_unmap_single(&priv->pdev->dev,
1553                                          dma_unmap_addr(cb, dma_addr),
1554                                          RX_BUF_LENGTH, DMA_FROM_DEVICE);
1555                 bcm_sysport_free_cb(cb);
1556         }
1557
1558         kfree(priv->rx_cbs);
1559         priv->rx_cbs = NULL;
1560
1561         netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1562 }
1563
1564 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1565 {
1566         struct bcm_sysport_priv *priv = netdev_priv(dev);
1567         u32 reg;
1568
1569         if (priv->is_lite)
1570                 return;
1571
1572         reg = umac_readl(priv, UMAC_CMD);
1573         if (dev->flags & IFF_PROMISC)
1574                 reg |= CMD_PROMISC;
1575         else
1576                 reg &= ~CMD_PROMISC;
1577         umac_writel(priv, reg, UMAC_CMD);
1578
1579         /* No support for ALLMULTI */
1580         if (dev->flags & IFF_ALLMULTI)
1581                 return;
1582 }
1583
1584 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1585                                    u32 mask, unsigned int enable)
1586 {
1587         u32 reg;
1588
1589         if (!priv->is_lite) {
1590                 reg = umac_readl(priv, UMAC_CMD);
1591                 if (enable)
1592                         reg |= mask;
1593                 else
1594                         reg &= ~mask;
1595                 umac_writel(priv, reg, UMAC_CMD);
1596         } else {
1597                 reg = gib_readl(priv, GIB_CONTROL);
1598                 if (enable)
1599                         reg |= mask;
1600                 else
1601                         reg &= ~mask;
1602                 gib_writel(priv, reg, GIB_CONTROL);
1603         }
1604
1605         /* UniMAC stops on a packet boundary, wait for a full-sized packet
1606          * to be processed (1 msec).
1607          */
1608         if (enable == 0)
1609                 usleep_range(1000, 2000);
1610 }
1611
1612 static inline void umac_reset(struct bcm_sysport_priv *priv)
1613 {
1614         u32 reg;
1615
1616         if (priv->is_lite)
1617                 return;
1618
1619         reg = umac_readl(priv, UMAC_CMD);
1620         reg |= CMD_SW_RESET;
1621         umac_writel(priv, reg, UMAC_CMD);
1622         udelay(10);
1623         reg = umac_readl(priv, UMAC_CMD);
1624         reg &= ~CMD_SW_RESET;
1625         umac_writel(priv, reg, UMAC_CMD);
1626 }
1627
1628 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1629                              unsigned char *addr)
1630 {
1631         u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) |
1632                     addr[3];
1633         u32 mac1 = (addr[4] << 8) | addr[5];
1634
1635         if (!priv->is_lite) {
1636                 umac_writel(priv, mac0, UMAC_MAC0);
1637                 umac_writel(priv, mac1, UMAC_MAC1);
1638         } else {
1639                 gib_writel(priv, mac0, GIB_MAC0);
1640                 gib_writel(priv, mac1, GIB_MAC1);
1641         }
1642 }
1643
1644 static void topctrl_flush(struct bcm_sysport_priv *priv)
1645 {
1646         topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1647         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1648         mdelay(1);
1649         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1650         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1651 }
1652
1653 static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1654 {
1655         struct bcm_sysport_priv *priv = netdev_priv(dev);
1656         struct sockaddr *addr = p;
1657
1658         if (!is_valid_ether_addr(addr->sa_data))
1659                 return -EINVAL;
1660
1661         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1662
1663         /* interface is disabled, changes to MAC will be reflected on next
1664          * open call
1665          */
1666         if (!netif_running(dev))
1667                 return 0;
1668
1669         umac_set_hw_addr(priv, dev->dev_addr);
1670
1671         return 0;
1672 }
1673
1674 static struct net_device_stats *bcm_sysport_get_nstats(struct net_device *dev)
1675 {
1676         struct bcm_sysport_priv *priv = netdev_priv(dev);
1677         unsigned long tx_bytes = 0, tx_packets = 0;
1678         struct bcm_sysport_tx_ring *ring;
1679         unsigned int q;
1680
1681         for (q = 0; q < dev->num_tx_queues; q++) {
1682                 ring = &priv->tx_rings[q];
1683                 tx_bytes += ring->bytes;
1684                 tx_packets += ring->packets;
1685         }
1686
1687         dev->stats.tx_bytes = tx_bytes;
1688         dev->stats.tx_packets = tx_packets;
1689         return &dev->stats;
1690 }
1691
1692 static void bcm_sysport_netif_start(struct net_device *dev)
1693 {
1694         struct bcm_sysport_priv *priv = netdev_priv(dev);
1695
1696         /* Enable NAPI */
1697         napi_enable(&priv->napi);
1698
1699         /* Enable RX interrupt and TX ring full interrupt */
1700         intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1701
1702         phy_start(dev->phydev);
1703
1704         /* Enable TX interrupts for the TXQs */
1705         if (!priv->is_lite)
1706                 intrl2_1_mask_clear(priv, 0xffffffff);
1707         else
1708                 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK);
1709
1710         /* Last call before we start the real business */
1711         netif_tx_start_all_queues(dev);
1712 }
1713
1714 static void rbuf_init(struct bcm_sysport_priv *priv)
1715 {
1716         u32 reg;
1717
1718         reg = rbuf_readl(priv, RBUF_CONTROL);
1719         reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1720         /* Set a correct RSB format on SYSTEMPORT Lite */
1721         if (priv->is_lite) {
1722                 reg &= ~RBUF_RSB_SWAP1;
1723                 reg |= RBUF_RSB_SWAP0;
1724         }
1725         rbuf_writel(priv, reg, RBUF_CONTROL);
1726 }
1727
1728 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv)
1729 {
1730         intrl2_0_mask_set(priv, 0xffffffff);
1731         intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1732         if (!priv->is_lite) {
1733                 intrl2_1_mask_set(priv, 0xffffffff);
1734                 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1735         }
1736 }
1737
1738 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv)
1739 {
1740         u32 __maybe_unused reg;
1741
1742         /* Include Broadcom tag in pad extension */
1743         if (netdev_uses_dsa(priv->netdev)) {
1744                 reg = gib_readl(priv, GIB_CONTROL);
1745                 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT);
1746                 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT;
1747                 gib_writel(priv, reg, GIB_CONTROL);
1748         }
1749 }
1750
1751 static int bcm_sysport_open(struct net_device *dev)
1752 {
1753         struct bcm_sysport_priv *priv = netdev_priv(dev);
1754         struct phy_device *phydev;
1755         unsigned int i;
1756         int ret;
1757
1758         /* Reset UniMAC */
1759         umac_reset(priv);
1760
1761         /* Flush TX and RX FIFOs at TOPCTRL level */
1762         topctrl_flush(priv);
1763
1764         /* Disable the UniMAC RX/TX */
1765         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1766
1767         /* Enable RBUF 2bytes alignment and Receive Status Block */
1768         rbuf_init(priv);
1769
1770         /* Set maximum frame length */
1771         if (!priv->is_lite)
1772                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1773         else
1774                 gib_set_pad_extension(priv);
1775
1776         /* Set MAC address */
1777         umac_set_hw_addr(priv, dev->dev_addr);
1778
1779         /* Read CRC forward */
1780         if (!priv->is_lite)
1781                 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
1782         else
1783                 priv->crc_fwd = !!(gib_readl(priv, GIB_CONTROL) &
1784                                    GIB_FCS_STRIP);
1785
1786         phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1787                                 0, priv->phy_interface);
1788         if (!phydev) {
1789                 netdev_err(dev, "could not attach to PHY\n");
1790                 return -ENODEV;
1791         }
1792
1793         /* Reset house keeping link status */
1794         priv->old_duplex = -1;
1795         priv->old_link = -1;
1796         priv->old_pause = -1;
1797
1798         /* mask all interrupts and request them */
1799         bcm_sysport_mask_all_intrs(priv);
1800
1801         ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
1802         if (ret) {
1803                 netdev_err(dev, "failed to request RX interrupt\n");
1804                 goto out_phy_disconnect;
1805         }
1806
1807         if (!priv->is_lite) {
1808                 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0,
1809                                   dev->name, dev);
1810                 if (ret) {
1811                         netdev_err(dev, "failed to request TX interrupt\n");
1812                         goto out_free_irq0;
1813                 }
1814         }
1815
1816         /* Initialize both hardware and software ring */
1817         for (i = 0; i < dev->num_tx_queues; i++) {
1818                 ret = bcm_sysport_init_tx_ring(priv, i);
1819                 if (ret) {
1820                         netdev_err(dev, "failed to initialize TX ring %d\n",
1821                                    i);
1822                         goto out_free_tx_ring;
1823                 }
1824         }
1825
1826         /* Initialize linked-list */
1827         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
1828
1829         /* Initialize RX ring */
1830         ret = bcm_sysport_init_rx_ring(priv);
1831         if (ret) {
1832                 netdev_err(dev, "failed to initialize RX ring\n");
1833                 goto out_free_rx_ring;
1834         }
1835
1836         /* Turn on RDMA */
1837         ret = rdma_enable_set(priv, 1);
1838         if (ret)
1839                 goto out_free_rx_ring;
1840
1841         /* Turn on TDMA */
1842         ret = tdma_enable_set(priv, 1);
1843         if (ret)
1844                 goto out_clear_rx_int;
1845
1846         /* Turn on UniMAC TX/RX */
1847         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
1848
1849         bcm_sysport_netif_start(dev);
1850
1851         return 0;
1852
1853 out_clear_rx_int:
1854         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1855 out_free_rx_ring:
1856         bcm_sysport_fini_rx_ring(priv);
1857 out_free_tx_ring:
1858         for (i = 0; i < dev->num_tx_queues; i++)
1859                 bcm_sysport_fini_tx_ring(priv, i);
1860         if (!priv->is_lite)
1861                 free_irq(priv->irq1, dev);
1862 out_free_irq0:
1863         free_irq(priv->irq0, dev);
1864 out_phy_disconnect:
1865         phy_disconnect(phydev);
1866         return ret;
1867 }
1868
1869 static void bcm_sysport_netif_stop(struct net_device *dev)
1870 {
1871         struct bcm_sysport_priv *priv = netdev_priv(dev);
1872
1873         /* stop all software from updating hardware */
1874         netif_tx_stop_all_queues(dev);
1875         napi_disable(&priv->napi);
1876         phy_stop(dev->phydev);
1877
1878         /* mask all interrupts */
1879         bcm_sysport_mask_all_intrs(priv);
1880 }
1881
1882 static int bcm_sysport_stop(struct net_device *dev)
1883 {
1884         struct bcm_sysport_priv *priv = netdev_priv(dev);
1885         unsigned int i;
1886         int ret;
1887
1888         bcm_sysport_netif_stop(dev);
1889
1890         /* Disable UniMAC RX */
1891         umac_enable_set(priv, CMD_RX_EN, 0);
1892
1893         ret = tdma_enable_set(priv, 0);
1894         if (ret) {
1895                 netdev_err(dev, "timeout disabling RDMA\n");
1896                 return ret;
1897         }
1898
1899         /* Wait for a maximum packet size to be drained */
1900         usleep_range(2000, 3000);
1901
1902         ret = rdma_enable_set(priv, 0);
1903         if (ret) {
1904                 netdev_err(dev, "timeout disabling TDMA\n");
1905                 return ret;
1906         }
1907
1908         /* Disable UniMAC TX */
1909         umac_enable_set(priv, CMD_TX_EN, 0);
1910
1911         /* Free RX/TX rings SW structures */
1912         for (i = 0; i < dev->num_tx_queues; i++)
1913                 bcm_sysport_fini_tx_ring(priv, i);
1914         bcm_sysport_fini_rx_ring(priv);
1915
1916         free_irq(priv->irq0, dev);
1917         if (!priv->is_lite)
1918                 free_irq(priv->irq1, dev);
1919
1920         /* Disconnect from PHY */
1921         phy_disconnect(dev->phydev);
1922
1923         return 0;
1924 }
1925
1926 static const struct ethtool_ops bcm_sysport_ethtool_ops = {
1927         .get_drvinfo            = bcm_sysport_get_drvinfo,
1928         .get_msglevel           = bcm_sysport_get_msglvl,
1929         .set_msglevel           = bcm_sysport_set_msglvl,
1930         .get_link               = ethtool_op_get_link,
1931         .get_strings            = bcm_sysport_get_strings,
1932         .get_ethtool_stats      = bcm_sysport_get_stats,
1933         .get_sset_count         = bcm_sysport_get_sset_count,
1934         .get_wol                = bcm_sysport_get_wol,
1935         .set_wol                = bcm_sysport_set_wol,
1936         .get_coalesce           = bcm_sysport_get_coalesce,
1937         .set_coalesce           = bcm_sysport_set_coalesce,
1938         .get_link_ksettings     = phy_ethtool_get_link_ksettings,
1939         .set_link_ksettings     = phy_ethtool_set_link_ksettings,
1940 };
1941
1942 static const struct net_device_ops bcm_sysport_netdev_ops = {
1943         .ndo_start_xmit         = bcm_sysport_xmit,
1944         .ndo_tx_timeout         = bcm_sysport_tx_timeout,
1945         .ndo_open               = bcm_sysport_open,
1946         .ndo_stop               = bcm_sysport_stop,
1947         .ndo_set_features       = bcm_sysport_set_features,
1948         .ndo_set_rx_mode        = bcm_sysport_set_rx_mode,
1949         .ndo_set_mac_address    = bcm_sysport_change_mac,
1950 #ifdef CONFIG_NET_POLL_CONTROLLER
1951         .ndo_poll_controller    = bcm_sysport_poll_controller,
1952 #endif
1953         .ndo_get_stats          = bcm_sysport_get_nstats,
1954 };
1955
1956 #define REV_FMT "v%2x.%02x"
1957
1958 static const struct bcm_sysport_hw_params bcm_sysport_params[] = {
1959         [SYSTEMPORT] = {
1960                 .is_lite = false,
1961                 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS,
1962         },
1963         [SYSTEMPORT_LITE] = {
1964                 .is_lite = true,
1965                 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS,
1966         },
1967 };
1968
1969 static const struct of_device_id bcm_sysport_of_match[] = {
1970         { .compatible = "brcm,systemportlite-v1.00",
1971           .data = &bcm_sysport_params[SYSTEMPORT_LITE] },
1972         { .compatible = "brcm,systemport-v1.00",
1973           .data = &bcm_sysport_params[SYSTEMPORT] },
1974         { .compatible = "brcm,systemport",
1975           .data = &bcm_sysport_params[SYSTEMPORT] },
1976         { /* sentinel */ }
1977 };
1978 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
1979
1980 static int bcm_sysport_probe(struct platform_device *pdev)
1981 {
1982         const struct bcm_sysport_hw_params *params;
1983         const struct of_device_id *of_id = NULL;
1984         struct bcm_sysport_priv *priv;
1985         struct device_node *dn;
1986         struct net_device *dev;
1987         const void *macaddr;
1988         struct resource *r;
1989         u32 txq, rxq;
1990         int ret;
1991
1992         dn = pdev->dev.of_node;
1993         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1994         of_id = of_match_node(bcm_sysport_of_match, dn);
1995         if (!of_id || !of_id->data)
1996                 return -EINVAL;
1997
1998         /* Fairly quickly we need to know the type of adapter we have */
1999         params = of_id->data;
2000
2001         /* Read the Transmit/Receive Queue properties */
2002         if (of_property_read_u32(dn, "systemport,num-txq", &txq))
2003                 txq = TDMA_NUM_RINGS;
2004         if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
2005                 rxq = 1;
2006
2007         /* Sanity check the number of transmit queues */
2008         if (!txq || txq > TDMA_NUM_RINGS)
2009                 return -EINVAL;
2010
2011         dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
2012         if (!dev)
2013                 return -ENOMEM;
2014
2015         /* Initialize private members */
2016         priv = netdev_priv(dev);
2017
2018         /* Allocate number of TX rings */
2019         priv->tx_rings = devm_kcalloc(&pdev->dev, txq,
2020                                       sizeof(struct bcm_sysport_tx_ring),
2021                                       GFP_KERNEL);
2022         if (!priv->tx_rings)
2023                 return -ENOMEM;
2024
2025         priv->is_lite = params->is_lite;
2026         priv->num_rx_desc_words = params->num_rx_desc_words;
2027
2028         priv->irq0 = platform_get_irq(pdev, 0);
2029         if (!priv->is_lite) {
2030                 priv->irq1 = platform_get_irq(pdev, 1);
2031                 priv->wol_irq = platform_get_irq(pdev, 2);
2032         } else {
2033                 priv->wol_irq = platform_get_irq(pdev, 1);
2034         }
2035         if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) {
2036                 dev_err(&pdev->dev, "invalid interrupts\n");
2037                 ret = -EINVAL;
2038                 goto err_free_netdev;
2039         }
2040
2041         priv->base = devm_ioremap_resource(&pdev->dev, r);
2042         if (IS_ERR(priv->base)) {
2043                 ret = PTR_ERR(priv->base);
2044                 goto err_free_netdev;
2045         }
2046
2047         priv->netdev = dev;
2048         priv->pdev = pdev;
2049
2050         priv->phy_interface = of_get_phy_mode(dn);
2051         /* Default to GMII interface mode */
2052         if (priv->phy_interface < 0)
2053                 priv->phy_interface = PHY_INTERFACE_MODE_GMII;
2054
2055         /* In the case of a fixed PHY, the DT node associated
2056          * to the PHY is the Ethernet MAC DT node.
2057          */
2058         if (of_phy_is_fixed_link(dn)) {
2059                 ret = of_phy_register_fixed_link(dn);
2060                 if (ret) {
2061                         dev_err(&pdev->dev, "failed to register fixed PHY\n");
2062                         goto err_free_netdev;
2063                 }
2064
2065                 priv->phy_dn = dn;
2066         }
2067
2068         /* Initialize netdevice members */
2069         macaddr = of_get_mac_address(dn);
2070         if (!macaddr || !is_valid_ether_addr(macaddr)) {
2071                 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
2072                 eth_hw_addr_random(dev);
2073         } else {
2074                 ether_addr_copy(dev->dev_addr, macaddr);
2075         }
2076
2077         SET_NETDEV_DEV(dev, &pdev->dev);
2078         dev_set_drvdata(&pdev->dev, dev);
2079         dev->ethtool_ops = &bcm_sysport_ethtool_ops;
2080         dev->netdev_ops = &bcm_sysport_netdev_ops;
2081         netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64);
2082
2083         /* HW supported features, none enabled by default */
2084         dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
2085                                 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2086
2087         /* Request the WOL interrupt and advertise suspend if available */
2088         priv->wol_irq_disabled = 1;
2089         ret = devm_request_irq(&pdev->dev, priv->wol_irq,
2090                                bcm_sysport_wol_isr, 0, dev->name, priv);
2091         if (!ret)
2092                 device_set_wakeup_capable(&pdev->dev, 1);
2093
2094         /* Set the needed headroom once and for all */
2095         BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
2096         dev->needed_headroom += sizeof(struct bcm_tsb);
2097
2098         /* libphy will adjust the link state accordingly */
2099         netif_carrier_off(dev);
2100
2101         ret = register_netdev(dev);
2102         if (ret) {
2103                 dev_err(&pdev->dev, "failed to register net_device\n");
2104                 goto err_deregister_fixed_link;
2105         }
2106
2107         priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
2108         dev_info(&pdev->dev,
2109                  "Broadcom SYSTEMPORT%s" REV_FMT
2110                  " at 0x%p (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
2111                  priv->is_lite ? " Lite" : "",
2112                  (priv->rev >> 8) & 0xff, priv->rev & 0xff,
2113                  priv->base, priv->irq0, priv->irq1, txq, rxq);
2114
2115         return 0;
2116
2117 err_deregister_fixed_link:
2118         if (of_phy_is_fixed_link(dn))
2119                 of_phy_deregister_fixed_link(dn);
2120 err_free_netdev:
2121         free_netdev(dev);
2122         return ret;
2123 }
2124
2125 static int bcm_sysport_remove(struct platform_device *pdev)
2126 {
2127         struct net_device *dev = dev_get_drvdata(&pdev->dev);
2128         struct device_node *dn = pdev->dev.of_node;
2129
2130         /* Not much to do, ndo_close has been called
2131          * and we use managed allocations
2132          */
2133         unregister_netdev(dev);
2134         if (of_phy_is_fixed_link(dn))
2135                 of_phy_deregister_fixed_link(dn);
2136         free_netdev(dev);
2137         dev_set_drvdata(&pdev->dev, NULL);
2138
2139         return 0;
2140 }
2141
2142 #ifdef CONFIG_PM_SLEEP
2143 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
2144 {
2145         struct net_device *ndev = priv->netdev;
2146         unsigned int timeout = 1000;
2147         u32 reg;
2148
2149         /* Password has already been programmed */
2150         reg = umac_readl(priv, UMAC_MPD_CTRL);
2151         reg |= MPD_EN;
2152         reg &= ~PSW_EN;
2153         if (priv->wolopts & WAKE_MAGICSECURE)
2154                 reg |= PSW_EN;
2155         umac_writel(priv, reg, UMAC_MPD_CTRL);
2156
2157         /* Make sure RBUF entered WoL mode as result */
2158         do {
2159                 reg = rbuf_readl(priv, RBUF_STATUS);
2160                 if (reg & RBUF_WOL_MODE)
2161                         break;
2162
2163                 udelay(10);
2164         } while (timeout-- > 0);
2165
2166         /* Do not leave the UniMAC RBUF matching only MPD packets */
2167         if (!timeout) {
2168                 reg = umac_readl(priv, UMAC_MPD_CTRL);
2169                 reg &= ~MPD_EN;
2170                 umac_writel(priv, reg, UMAC_MPD_CTRL);
2171                 netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
2172                 return -ETIMEDOUT;
2173         }
2174
2175         /* UniMAC receive needs to be turned on */
2176         umac_enable_set(priv, CMD_RX_EN, 1);
2177
2178         /* Enable the interrupt wake-up source */
2179         intrl2_0_mask_clear(priv, INTRL2_0_MPD);
2180
2181         netif_dbg(priv, wol, ndev, "entered WOL mode\n");
2182
2183         return 0;
2184 }
2185
2186 static int bcm_sysport_suspend(struct device *d)
2187 {
2188         struct net_device *dev = dev_get_drvdata(d);
2189         struct bcm_sysport_priv *priv = netdev_priv(dev);
2190         unsigned int i;
2191         int ret = 0;
2192         u32 reg;
2193
2194         if (!netif_running(dev))
2195                 return 0;
2196
2197         bcm_sysport_netif_stop(dev);
2198
2199         phy_suspend(dev->phydev);
2200
2201         netif_device_detach(dev);
2202
2203         /* Disable UniMAC RX */
2204         umac_enable_set(priv, CMD_RX_EN, 0);
2205
2206         ret = rdma_enable_set(priv, 0);
2207         if (ret) {
2208                 netdev_err(dev, "RDMA timeout!\n");
2209                 return ret;
2210         }
2211
2212         /* Disable RXCHK if enabled */
2213         if (priv->rx_chk_en) {
2214                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2215                 reg &= ~RXCHK_EN;
2216                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2217         }
2218
2219         /* Flush RX pipe */
2220         if (!priv->wolopts)
2221                 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
2222
2223         ret = tdma_enable_set(priv, 0);
2224         if (ret) {
2225                 netdev_err(dev, "TDMA timeout!\n");
2226                 return ret;
2227         }
2228
2229         /* Wait for a packet boundary */
2230         usleep_range(2000, 3000);
2231
2232         umac_enable_set(priv, CMD_TX_EN, 0);
2233
2234         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
2235
2236         /* Free RX/TX rings SW structures */
2237         for (i = 0; i < dev->num_tx_queues; i++)
2238                 bcm_sysport_fini_tx_ring(priv, i);
2239         bcm_sysport_fini_rx_ring(priv);
2240
2241         /* Get prepared for Wake-on-LAN */
2242         if (device_may_wakeup(d) && priv->wolopts)
2243                 ret = bcm_sysport_suspend_to_wol(priv);
2244
2245         return ret;
2246 }
2247
2248 static int bcm_sysport_resume(struct device *d)
2249 {
2250         struct net_device *dev = dev_get_drvdata(d);
2251         struct bcm_sysport_priv *priv = netdev_priv(dev);
2252         unsigned int i;
2253         u32 reg;
2254         int ret;
2255
2256         if (!netif_running(dev))
2257                 return 0;
2258
2259         umac_reset(priv);
2260
2261         /* We may have been suspended and never received a WOL event that
2262          * would turn off MPD detection, take care of that now
2263          */
2264         bcm_sysport_resume_from_wol(priv);
2265
2266         /* Initialize both hardware and software ring */
2267         for (i = 0; i < dev->num_tx_queues; i++) {
2268                 ret = bcm_sysport_init_tx_ring(priv, i);
2269                 if (ret) {
2270                         netdev_err(dev, "failed to initialize TX ring %d\n",
2271                                    i);
2272                         goto out_free_tx_rings;
2273                 }
2274         }
2275
2276         /* Initialize linked-list */
2277         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2278
2279         /* Initialize RX ring */
2280         ret = bcm_sysport_init_rx_ring(priv);
2281         if (ret) {
2282                 netdev_err(dev, "failed to initialize RX ring\n");
2283                 goto out_free_rx_ring;
2284         }
2285
2286         netif_device_attach(dev);
2287
2288         /* RX pipe enable */
2289         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2290
2291         ret = rdma_enable_set(priv, 1);
2292         if (ret) {
2293                 netdev_err(dev, "failed to enable RDMA\n");
2294                 goto out_free_rx_ring;
2295         }
2296
2297         /* Enable rxhck */
2298         if (priv->rx_chk_en) {
2299                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2300                 reg |= RXCHK_EN;
2301                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2302         }
2303
2304         rbuf_init(priv);
2305
2306         /* Set maximum frame length */
2307         if (!priv->is_lite)
2308                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2309         else
2310                 gib_set_pad_extension(priv);
2311
2312         /* Set MAC address */
2313         umac_set_hw_addr(priv, dev->dev_addr);
2314
2315         umac_enable_set(priv, CMD_RX_EN, 1);
2316
2317         /* TX pipe enable */
2318         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2319
2320         umac_enable_set(priv, CMD_TX_EN, 1);
2321
2322         ret = tdma_enable_set(priv, 1);
2323         if (ret) {
2324                 netdev_err(dev, "TDMA timeout!\n");
2325                 goto out_free_rx_ring;
2326         }
2327
2328         phy_resume(dev->phydev);
2329
2330         bcm_sysport_netif_start(dev);
2331
2332         return 0;
2333
2334 out_free_rx_ring:
2335         bcm_sysport_fini_rx_ring(priv);
2336 out_free_tx_rings:
2337         for (i = 0; i < dev->num_tx_queues; i++)
2338                 bcm_sysport_fini_tx_ring(priv, i);
2339         return ret;
2340 }
2341 #endif
2342
2343 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2344                 bcm_sysport_suspend, bcm_sysport_resume);
2345
2346 static struct platform_driver bcm_sysport_driver = {
2347         .probe  = bcm_sysport_probe,
2348         .remove = bcm_sysport_remove,
2349         .driver =  {
2350                 .name = "brcm-systemport",
2351                 .of_match_table = bcm_sysport_of_match,
2352                 .pm = &bcm_sysport_pm_ops,
2353         },
2354 };
2355 module_platform_driver(bcm_sysport_driver);
2356
2357 MODULE_AUTHOR("Broadcom Corporation");
2358 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2359 MODULE_ALIAS("platform:brcm-systemport");
2360 MODULE_LICENSE("GPL");