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 = readl_relaxed(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         writel_relaxed(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 readl_relaxed(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         writel_relaxed(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         writel_relaxed(upper_32_bits(addr) & DESC_ADDR_HI_MASK,
 114                      d + DESC_ADDR_HI_STATUS_LEN);
 115 #endif
 116         writel_relaxed(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 void 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
 162 static void bcm_sysport_set_tx_csum(struct net_device *dev,
 163                                     netdev_features_t wanted)
 164 {
 165         struct bcm_sysport_priv *priv = netdev_priv(dev);
 166         u32 reg;
 167
 168         /* Hardware transmit checksum requires us to enable the Transmit status
 169          * block prepended to the packet contents
 170          */
 171         priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM));
 172         reg = tdma_readl(priv, TDMA_CONTROL);
 173         if (priv->tsb_en)
 174                 reg |= tdma_control_bit(priv, TSB_EN);
 175         else
 176                 reg &= ~tdma_control_bit(priv, TSB_EN);
 177         tdma_writel(priv, reg, TDMA_CONTROL);
 178 }
 179
 180 static int bcm_sysport_set_features(struct net_device *dev,
 181                                     netdev_features_t features)
 182 {
 183         struct bcm_sysport_priv *priv = netdev_priv(dev);
 184
 185         /* Read CRC forward */
 186         if (!priv->is_lite)
 187                 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
 188         else
 189                 priv->crc_fwd = !((gib_readl(priv, GIB_CONTROL) &
 190                                   GIB_FCS_STRIP) >> GIB_FCS_STRIP_SHIFT);
 191
 192         bcm_sysport_set_rx_csum(dev, features);
 193         bcm_sysport_set_tx_csum(dev, features);
 194
 195         return 0;
 196 }
 197
 198 /* Hardware counters must be kept in sync because the order/offset
 199  * is important here (order in structure declaration = order in hardware)
 200  */
 201 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = {
 202         /* general stats */
 203         STAT_NETDEV64(rx_packets),
 204         STAT_NETDEV64(tx_packets),
 205         STAT_NETDEV64(rx_bytes),
 206         STAT_NETDEV64(tx_bytes),
 207         STAT_NETDEV(rx_errors),
 208         STAT_NETDEV(tx_errors),
 209         STAT_NETDEV(rx_dropped),
 210         STAT_NETDEV(tx_dropped),
 211         STAT_NETDEV(multicast),
 212         /* UniMAC RSV counters */
 213         STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
 214         STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
 215         STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
 216         STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
 217         STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
 218         STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
 219         STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
 220         STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
 221         STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
 222         STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
 223         STAT_MIB_RX("rx_pkts", mib.rx.pkt),
 224         STAT_MIB_RX("rx_bytes", mib.rx.bytes),
 225         STAT_MIB_RX("rx_multicast", mib.rx.mca),
 226         STAT_MIB_RX("rx_broadcast", mib.rx.bca),
 227         STAT_MIB_RX("rx_fcs", mib.rx.fcs),
 228         STAT_MIB_RX("rx_control", mib.rx.cf),
 229         STAT_MIB_RX("rx_pause", mib.rx.pf),
 230         STAT_MIB_RX("rx_unknown", mib.rx.uo),
 231         STAT_MIB_RX("rx_align", mib.rx.aln),
 232         STAT_MIB_RX("rx_outrange", mib.rx.flr),
 233         STAT_MIB_RX("rx_code", mib.rx.cde),
 234         STAT_MIB_RX("rx_carrier", mib.rx.fcr),
 235         STAT_MIB_RX("rx_oversize", mib.rx.ovr),
 236         STAT_MIB_RX("rx_jabber", mib.rx.jbr),
 237         STAT_MIB_RX("rx_mtu_err", mib.rx.mtue),
 238         STAT_MIB_RX("rx_good_pkts", mib.rx.pok),
 239         STAT_MIB_RX("rx_unicast", mib.rx.uc),
 240         STAT_MIB_RX("rx_ppp", mib.rx.ppp),
 241         STAT_MIB_RX("rx_crc", mib.rx.rcrc),
 242         /* UniMAC TSV counters */
 243         STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
 244         STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
 245         STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
 246         STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
 247         STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
 248         STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
 249         STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
 250         STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
 251         STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
 252         STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
 253         STAT_MIB_TX("tx_pkts", mib.tx.pkts),
 254         STAT_MIB_TX("tx_multicast", mib.tx.mca),
 255         STAT_MIB_TX("tx_broadcast", mib.tx.bca),
 256         STAT_MIB_TX("tx_pause", mib.tx.pf),
 257         STAT_MIB_TX("tx_control", mib.tx.cf),
 258         STAT_MIB_TX("tx_fcs_err", mib.tx.fcs),
 259         STAT_MIB_TX("tx_oversize", mib.tx.ovr),
 260         STAT_MIB_TX("tx_defer", mib.tx.drf),
 261         STAT_MIB_TX("tx_excess_defer", mib.tx.edf),
 262         STAT_MIB_TX("tx_single_col", mib.tx.scl),
 263         STAT_MIB_TX("tx_multi_col", mib.tx.mcl),
 264         STAT_MIB_TX("tx_late_col", mib.tx.lcl),
 265         STAT_MIB_TX("tx_excess_col", mib.tx.ecl),
 266         STAT_MIB_TX("tx_frags", mib.tx.frg),
 267         STAT_MIB_TX("tx_total_col", mib.tx.ncl),
 268         STAT_MIB_TX("tx_jabber", mib.tx.jbr),
 269         STAT_MIB_TX("tx_bytes", mib.tx.bytes),
 270         STAT_MIB_TX("tx_good_pkts", mib.tx.pok),
 271         STAT_MIB_TX("tx_unicast", mib.tx.uc),
 272         /* UniMAC RUNT counters */
 273         STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
 274         STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
 275         STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
 276         STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
 277         /* RXCHK misc statistics */
 278         STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR),
 279         STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc,
 280                    RXCHK_OTHER_DISC_CNTR),
 281         /* RBUF misc statistics */
 282         STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR),
 283         STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR),
 284         STAT_MIB_SOFT("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
 285         STAT_MIB_SOFT("rx_dma_failed", mib.rx_dma_failed),
 286         STAT_MIB_SOFT("tx_dma_failed", mib.tx_dma_failed),
 287         STAT_MIB_SOFT("tx_realloc_tsb", mib.tx_realloc_tsb),
 288         STAT_MIB_SOFT("tx_realloc_tsb_failed", mib.tx_realloc_tsb_failed),
 289         /* Per TX-queue statistics are dynamically appended */
 290 };
 291
 292 #define BCM_SYSPORT_STATS_LEN   ARRAY_SIZE(bcm_sysport_gstrings_stats)
 293
 294 static void bcm_sysport_get_drvinfo(struct net_device *dev,
 295                                     struct ethtool_drvinfo *info)
 296 {
 297         strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
 298         strlcpy(info->version, "0.1", sizeof(info->version));
 299         strlcpy(info->bus_info, "platform", sizeof(info->bus_info));
 300 }
 301
 302 static u32 bcm_sysport_get_msglvl(struct net_device *dev)
 303 {
 304         struct bcm_sysport_priv *priv = netdev_priv(dev);
 305
 306         return priv->msg_enable;
 307 }
 308
 309 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
 310 {
 311         struct bcm_sysport_priv *priv = netdev_priv(dev);
 312
 313         priv->msg_enable = enable;
 314 }
 315
 316 static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type)
 317 {
 318         switch (type) {
 319         case BCM_SYSPORT_STAT_NETDEV:
 320         case BCM_SYSPORT_STAT_NETDEV64:
 321         case BCM_SYSPORT_STAT_RXCHK:
 322         case BCM_SYSPORT_STAT_RBUF:
 323         case BCM_SYSPORT_STAT_SOFT:
 324                 return true;
 325         default:
 326                 return false;
 327         }
 328 }
 329
 330 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set)
 331 {
 332         struct bcm_sysport_priv *priv = netdev_priv(dev);
 333         const struct bcm_sysport_stats *s;
 334         unsigned int i, j;
 335
 336         switch (string_set) {
 337         case ETH_SS_STATS:
 338                 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 339                         s = &bcm_sysport_gstrings_stats[i];
 340                         if (priv->is_lite &&
 341                             !bcm_sysport_lite_stat_valid(s->type))
 342                                 continue;
 343                         j++;
 344                 }
 345                 /* Include per-queue statistics */
 346                 return j + dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
 347         default:
 348                 return -EOPNOTSUPP;
 349         }
 350 }
 351
 352 static void bcm_sysport_get_strings(struct net_device *dev,
 353                                     u32 stringset, u8 *data)
 354 {
 355         struct bcm_sysport_priv *priv = netdev_priv(dev);
 356         const struct bcm_sysport_stats *s;
 357         char buf[128];
 358         int i, j;
 359
 360         switch (stringset) {
 361         case ETH_SS_STATS:
 362                 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 363                         s = &bcm_sysport_gstrings_stats[i];
 364                         if (priv->is_lite &&
 365                             !bcm_sysport_lite_stat_valid(s->type))
 366                                 continue;
 367
 368                         memcpy(data + j * ETH_GSTRING_LEN, s->stat_string,
 369                                ETH_GSTRING_LEN);
 370                         j++;
 371                 }
 372
 373                 for (i = 0; i < dev->num_tx_queues; i++) {
 374                         snprintf(buf, sizeof(buf), "txq%d_packets", i);
 375                         memcpy(data + j * ETH_GSTRING_LEN, buf,
 376                                ETH_GSTRING_LEN);
 377                         j++;
 378
 379                         snprintf(buf, sizeof(buf), "txq%d_bytes", i);
 380                         memcpy(data + j * ETH_GSTRING_LEN, buf,
 381                                ETH_GSTRING_LEN);
 382                         j++;
 383                 }
 384                 break;
 385         default:
 386                 break;
 387         }
 388 }
 389
 390 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
 391 {
 392         int i, j = 0;
 393
 394         for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 395                 const struct bcm_sysport_stats *s;
 396                 u8 offset = 0;
 397                 u32 val = 0;
 398                 char *p;
 399
 400                 s = &bcm_sysport_gstrings_stats[i];
 401                 switch (s->type) {
 402                 case BCM_SYSPORT_STAT_NETDEV:
 403                 case BCM_SYSPORT_STAT_NETDEV64:
 404                 case BCM_SYSPORT_STAT_SOFT:
 405                         continue;
 406                 case BCM_SYSPORT_STAT_MIB_RX:
 407                 case BCM_SYSPORT_STAT_MIB_TX:
 408                 case BCM_SYSPORT_STAT_RUNT:
 409                         if (priv->is_lite)
 410                                 continue;
 411
 412                         if (s->type != BCM_SYSPORT_STAT_MIB_RX)
 413                                 offset = UMAC_MIB_STAT_OFFSET;
 414                         val = umac_readl(priv, UMAC_MIB_START + j + offset);
 415                         break;
 416                 case BCM_SYSPORT_STAT_RXCHK:
 417                         val = rxchk_readl(priv, s->reg_offset);
 418                         if (val == ~0)
 419                                 rxchk_writel(priv, 0, s->reg_offset);
 420                         break;
 421                 case BCM_SYSPORT_STAT_RBUF:
 422                         val = rbuf_readl(priv, s->reg_offset);
 423                         if (val == ~0)
 424                                 rbuf_writel(priv, 0, s->reg_offset);
 425                         break;
 426                 }
 427
 428                 j += s->stat_sizeof;
 429                 p = (char *)priv + s->stat_offset;
 430                 *(u32 *)p = val;
 431         }
 432
 433         netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
 434 }
 435
 436 static void bcm_sysport_update_tx_stats(struct bcm_sysport_priv *priv,
 437                                         u64 *tx_bytes, u64 *tx_packets)
 438 {
 439         struct bcm_sysport_tx_ring *ring;
 440         u64 bytes = 0, packets = 0;
 441         unsigned int start;
 442         unsigned int q;
 443
 444         for (q = 0; q < priv->netdev->num_tx_queues; q++) {
 445                 ring = &priv->tx_rings[q];
 446                 do {
 447                         start = u64_stats_fetch_begin_irq(&priv->syncp);
 448                         bytes = ring->bytes;
 449                         packets = ring->packets;
 450                 } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
 451
 452                 *tx_bytes += bytes;
 453                 *tx_packets += packets;
 454         }
 455 }
 456
 457 static void bcm_sysport_get_stats(struct net_device *dev,
 458                                   struct ethtool_stats *stats, u64 *data)
 459 {
 460         struct bcm_sysport_priv *priv = netdev_priv(dev);
 461         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
 462         struct u64_stats_sync *syncp = &priv->syncp;
 463         struct bcm_sysport_tx_ring *ring;
 464         u64 tx_bytes = 0, tx_packets = 0;
 465         unsigned int start;
 466         int i, j;
 467
 468         if (netif_running(dev)) {
 469                 bcm_sysport_update_mib_counters(priv);
 470                 bcm_sysport_update_tx_stats(priv, &tx_bytes, &tx_packets);
 471                 stats64->tx_bytes = tx_bytes;
 472                 stats64->tx_packets = tx_packets;
 473         }
 474
 475         for (i =  0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 476                 const struct bcm_sysport_stats *s;
 477                 char *p;
 478
 479                 s = &bcm_sysport_gstrings_stats[i];
 480                 if (s->type == BCM_SYSPORT_STAT_NETDEV)
 481                         p = (char *)&dev->stats;
 482                 else if (s->type == BCM_SYSPORT_STAT_NETDEV64)
 483                         p = (char *)stats64;
 484                 else
 485                         p = (char *)priv;
 486
 487                 if (priv->is_lite && !bcm_sysport_lite_stat_valid(s->type))
 488                         continue;
 489                 p += s->stat_offset;
 490
 491                 if (s->stat_sizeof == sizeof(u64) &&
 492                     s->type == BCM_SYSPORT_STAT_NETDEV64) {
 493                         do {
 494                                 start = u64_stats_fetch_begin_irq(syncp);
 495                                 data[i] = *(u64 *)p;
 496                         } while (u64_stats_fetch_retry_irq(syncp, start));
 497                 } else
 498                         data[i] = *(u32 *)p;
 499                 j++;
 500         }
 501
 502         /* For SYSTEMPORT Lite since we have holes in our statistics, j would
 503          * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it
 504          * needs to point to how many total statistics we have minus the
 505          * number of per TX queue statistics
 506          */
 507         j = bcm_sysport_get_sset_count(dev, ETH_SS_STATS) -
 508             dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
 509
 510         for (i = 0; i < dev->num_tx_queues; i++) {
 511                 ring = &priv->tx_rings[i];
 512                 data[j] = ring->packets;
 513                 j++;
 514                 data[j] = ring->bytes;
 515                 j++;
 516         }
 517 }
 518
 519 static void bcm_sysport_get_wol(struct net_device *dev,
 520                                 struct ethtool_wolinfo *wol)
 521 {
 522         struct bcm_sysport_priv *priv = netdev_priv(dev);
 523         u32 reg;
 524
 525         wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
 526         wol->wolopts = priv->wolopts;
 527
 528         if (!(priv->wolopts & WAKE_MAGICSECURE))
 529                 return;
 530
 531         /* Return the programmed SecureOn password */
 532         reg = umac_readl(priv, UMAC_PSW_MS);
 533         put_unaligned_be16(reg, &wol->sopass[0]);
 534         reg = umac_readl(priv, UMAC_PSW_LS);
 535         put_unaligned_be32(reg, &wol->sopass[2]);
 536 }
 537
 538 static int bcm_sysport_set_wol(struct net_device *dev,
 539                                struct ethtool_wolinfo *wol)
 540 {
 541         struct bcm_sysport_priv *priv = netdev_priv(dev);
 542         struct device *kdev = &priv->pdev->dev;
 543         u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
 544
 545         if (!device_can_wakeup(kdev))
 546                 return -ENOTSUPP;
 547
 548         if (wol->wolopts & ~supported)
 549                 return -EINVAL;
 550
 551         /* Program the SecureOn password */
 552         if (wol->wolopts & WAKE_MAGICSECURE) {
 553                 umac_writel(priv, get_unaligned_be16(&wol->sopass[0]),
 554                             UMAC_PSW_MS);
 555                 umac_writel(priv, get_unaligned_be32(&wol->sopass[2]),
 556                             UMAC_PSW_LS);
 557         }
 558
 559         /* Flag the device and relevant IRQ as wakeup capable */
 560         if (wol->wolopts) {
 561                 device_set_wakeup_enable(kdev, 1);
 562                 if (priv->wol_irq_disabled)
 563                         enable_irq_wake(priv->wol_irq);
 564                 priv->wol_irq_disabled = 0;
 565         } else {
 566                 device_set_wakeup_enable(kdev, 0);
 567                 /* Avoid unbalanced disable_irq_wake calls */
 568                 if (!priv->wol_irq_disabled)
 569                         disable_irq_wake(priv->wol_irq);
 570                 priv->wol_irq_disabled = 1;
 571         }
 572
 573         priv->wolopts = wol->wolopts;
 574
 575         return 0;
 576 }
 577
 578 static void bcm_sysport_set_rx_coalesce(struct bcm_sysport_priv *priv,
 579                                         u32 usecs, u32 pkts)
 580 {
 581         u32 reg;
 582
 583         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 584         reg &= ~(RDMA_INTR_THRESH_MASK |
 585                  RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT);
 586         reg |= pkts;
 587         reg |= DIV_ROUND_UP(usecs * 1000, 8192) << RDMA_TIMEOUT_SHIFT;
 588         rdma_writel(priv, reg, RDMA_MBDONE_INTR);
 589 }
 590
 591 static void bcm_sysport_set_tx_coalesce(struct bcm_sysport_tx_ring *ring,
 592                                         struct ethtool_coalesce *ec)
 593 {
 594         struct bcm_sysport_priv *priv = ring->priv;
 595         u32 reg;
 596
 597         reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(ring->index));
 598         reg &= ~(RING_INTR_THRESH_MASK |
 599                  RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT);
 600         reg |= ec->tx_max_coalesced_frames;
 601         reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) <<
 602                             RING_TIMEOUT_SHIFT;
 603         tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(ring->index));
 604 }
 605
 606 static int bcm_sysport_get_coalesce(struct net_device *dev,
 607                                     struct ethtool_coalesce *ec)
 608 {
 609         struct bcm_sysport_priv *priv = netdev_priv(dev);
 610         u32 reg;
 611
 612         reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0));
 613
 614         ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000;
 615         ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK;
 616
 617         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 618
 619         ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000;
 620         ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK;
 621         ec->use_adaptive_rx_coalesce = priv->dim.use_dim;
 622
 623         return 0;
 624 }
 625
 626 static int bcm_sysport_set_coalesce(struct net_device *dev,
 627                                     struct ethtool_coalesce *ec)
 628 {
 629         struct bcm_sysport_priv *priv = netdev_priv(dev);
 630         struct net_dim_cq_moder moder;
 631         u32 usecs, pkts;
 632         unsigned int i;
 633
 634         /* Base system clock is 125Mhz, DMA timeout is this reference clock
 635          * divided by 1024, which yield roughly 8.192 us, our maximum value has
 636          * to fit in the RING_TIMEOUT_MASK (16 bits).
 637          */
 638         if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
 639             ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
 640             ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
 641             ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
 642                 return -EINVAL;
 643
 644         if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
 645             (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0) ||
 646             ec->use_adaptive_tx_coalesce)
 647                 return -EINVAL;
 648
 649         for (i = 0; i < dev->num_tx_queues; i++)
 650                 bcm_sysport_set_tx_coalesce(&priv->tx_rings[i], ec);
 651
 652         priv->rx_coalesce_usecs = ec->rx_coalesce_usecs;
 653         priv->rx_max_coalesced_frames = ec->rx_max_coalesced_frames;
 654         usecs = priv->rx_coalesce_usecs;
 655         pkts = priv->rx_max_coalesced_frames;
 656
 657         if (ec->use_adaptive_rx_coalesce && !priv->dim.use_dim) {
 658                 moder = net_dim_get_def_rx_moderation(priv->dim.dim.mode);
 659                 usecs = moder.usec;
 660                 pkts = moder.pkts;
 661         }
 662
 663         priv->dim.use_dim = ec->use_adaptive_rx_coalesce;
 664
 665         /* Apply desired coalescing parameters */
 666         bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
 667
 668         return 0;
 669 }
 670
 671 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
 672 {
 673         dev_consume_skb_any(cb->skb);
 674         cb->skb = NULL;
 675         dma_unmap_addr_set(cb, dma_addr, 0);
 676 }
 677
 678 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
 679                                              struct bcm_sysport_cb *cb)
 680 {
 681         struct device *kdev = &priv->pdev->dev;
 682         struct net_device *ndev = priv->netdev;
 683         struct sk_buff *skb, *rx_skb;
 684         dma_addr_t mapping;
 685
 686         /* Allocate a new SKB for a new packet */
 687         skb = netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH);
 688         if (!skb) {
 689                 priv->mib.alloc_rx_buff_failed++;
 690                 netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
 691                 return NULL;
 692         }
 693
 694         mapping = dma_map_single(kdev, skb->data,
 695                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 696         if (dma_mapping_error(kdev, mapping)) {
 697                 priv->mib.rx_dma_failed++;
 698                 dev_kfree_skb_any(skb);
 699                 netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
 700                 return NULL;
 701         }
 702
 703         /* Grab the current SKB on the ring */
 704         rx_skb = cb->skb;
 705         if (likely(rx_skb))
 706                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 707                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 708
 709         /* Put the new SKB on the ring */
 710         cb->skb = skb;
 711         dma_unmap_addr_set(cb, dma_addr, mapping);
 712         dma_desc_set_addr(priv, cb->bd_addr, mapping);
 713
 714         netif_dbg(priv, rx_status, ndev, "RX refill\n");
 715
 716         /* Return the current SKB to the caller */
 717         return rx_skb;
 718 }
 719
 720 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
 721 {
 722         struct bcm_sysport_cb *cb;
 723         struct sk_buff *skb;
 724         unsigned int i;
 725
 726         for (i = 0; i < priv->num_rx_bds; i++) {
 727                 cb = &priv->rx_cbs[i];
 728                 skb = bcm_sysport_rx_refill(priv, cb);
 729                 if (skb)
 730                         dev_kfree_skb(skb);
 731                 if (!cb->skb)
 732                         return -ENOMEM;
 733         }
 734
 735         return 0;
 736 }
 737
 738 /* Poll the hardware for up to budget packets to process */
 739 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
 740                                         unsigned int budget)
 741 {
 742         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
 743         struct net_device *ndev = priv->netdev;
 744         unsigned int processed = 0, to_process;
 745         unsigned int processed_bytes = 0;
 746         struct bcm_sysport_cb *cb;
 747         struct sk_buff *skb;
 748         unsigned int p_index;
 749         u16 len, status;
 750         struct bcm_rsb *rsb;
 751
 752         /* Clear status before servicing to reduce spurious interrupts */
 753         intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR);
 754
 755         /* Determine how much we should process since last call, SYSTEMPORT Lite
 756          * groups the producer and consumer indexes into the same 32-bit
 757          * which we access using RDMA_CONS_INDEX
 758          */
 759         if (!priv->is_lite)
 760                 p_index = rdma_readl(priv, RDMA_PROD_INDEX);
 761         else
 762                 p_index = rdma_readl(priv, RDMA_CONS_INDEX);
 763         p_index &= RDMA_PROD_INDEX_MASK;
 764
 765         to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK;
 766
 767         netif_dbg(priv, rx_status, ndev,
 768                   "p_index=%d rx_c_index=%d to_process=%d\n",
 769                   p_index, priv->rx_c_index, to_process);
 770
 771         while ((processed < to_process) && (processed < budget)) {
 772                 cb = &priv->rx_cbs[priv->rx_read_ptr];
 773                 skb = bcm_sysport_rx_refill(priv, cb);
 774
 775
 776                 /* We do not have a backing SKB, so we do not a corresponding
 777                  * DMA mapping for this incoming packet since
 778                  * bcm_sysport_rx_refill always either has both skb and mapping
 779                  * or none.
 780                  */
 781                 if (unlikely(!skb)) {
 782                         netif_err(priv, rx_err, ndev, "out of memory!\n");
 783                         ndev->stats.rx_dropped++;
 784                         ndev->stats.rx_errors++;
 785                         goto next;
 786                 }
 787
 788                 /* Extract the Receive Status Block prepended */
 789                 rsb = (struct bcm_rsb *)skb->data;
 790                 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
 791                 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
 792                           DESC_STATUS_MASK;
 793
 794                 netif_dbg(priv, rx_status, ndev,
 795                           "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
 796                           p_index, priv->rx_c_index, priv->rx_read_ptr,
 797                           len, status);
 798
 799                 if (unlikely(len > RX_BUF_LENGTH)) {
 800                         netif_err(priv, rx_status, ndev, "oversized packet\n");
 801                         ndev->stats.rx_length_errors++;
 802                         ndev->stats.rx_errors++;
 803                         dev_kfree_skb_any(skb);
 804                         goto next;
 805                 }
 806
 807                 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
 808                         netif_err(priv, rx_status, ndev, "fragmented packet!\n");
 809                         ndev->stats.rx_dropped++;
 810                         ndev->stats.rx_errors++;
 811                         dev_kfree_skb_any(skb);
 812                         goto next;
 813                 }
 814
 815                 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
 816                         netif_err(priv, rx_err, ndev, "error packet\n");
 817                         if (status & RX_STATUS_OVFLOW)
 818                                 ndev->stats.rx_over_errors++;
 819                         ndev->stats.rx_dropped++;
 820                         ndev->stats.rx_errors++;
 821                         dev_kfree_skb_any(skb);
 822                         goto next;
 823                 }
 824
 825                 skb_put(skb, len);
 826
 827                 /* Hardware validated our checksum */
 828                 if (likely(status & DESC_L4_CSUM))
 829                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 830
 831                 /* Hardware pre-pends packets with 2bytes before Ethernet
 832                  * header plus we have the Receive Status Block, strip off all
 833                  * of this from the SKB.
 834                  */
 835                 skb_pull(skb, sizeof(*rsb) + 2);
 836                 len -= (sizeof(*rsb) + 2);
 837                 processed_bytes += len;
 838
 839                 /* UniMAC may forward CRC */
 840                 if (priv->crc_fwd) {
 841                         skb_trim(skb, len - ETH_FCS_LEN);
 842                         len -= ETH_FCS_LEN;
 843                 }
 844
 845                 skb->protocol = eth_type_trans(skb, ndev);
 846                 ndev->stats.rx_packets++;
 847                 ndev->stats.rx_bytes += len;
 848                 u64_stats_update_begin(&priv->syncp);
 849                 stats64->rx_packets++;
 850                 stats64->rx_bytes += len;
 851                 u64_stats_update_end(&priv->syncp);
 852
 853                 napi_gro_receive(&priv->napi, skb);
 854 next:
 855                 processed++;
 856                 priv->rx_read_ptr++;
 857
 858                 if (priv->rx_read_ptr == priv->num_rx_bds)
 859                         priv->rx_read_ptr = 0;
 860         }
 861
 862         priv->dim.packets = processed;
 863         priv->dim.bytes = processed_bytes;
 864
 865         return processed;
 866 }
 867
 868 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring,
 869                                        struct bcm_sysport_cb *cb,
 870                                        unsigned int *bytes_compl,
 871                                        unsigned int *pkts_compl)
 872 {
 873         struct bcm_sysport_priv *priv = ring->priv;
 874         struct device *kdev = &priv->pdev->dev;
 875
 876         if (cb->skb) {
 877                 *bytes_compl += cb->skb->len;
 878                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 879                                  dma_unmap_len(cb, dma_len),
 880                                  DMA_TO_DEVICE);
 881                 (*pkts_compl)++;
 882                 bcm_sysport_free_cb(cb);
 883         /* SKB fragment */
 884         } else if (dma_unmap_addr(cb, dma_addr)) {
 885                 *bytes_compl += dma_unmap_len(cb, dma_len);
 886                 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
 887                                dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
 888                 dma_unmap_addr_set(cb, dma_addr, 0);
 889         }
 890 }
 891
 892 /* Reclaim queued SKBs for transmission completion, lockless version */
 893 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 894                                              struct bcm_sysport_tx_ring *ring)
 895 {
 896         unsigned int pkts_compl = 0, bytes_compl = 0;
 897         struct net_device *ndev = priv->netdev;
 898         unsigned int txbds_processed = 0;
 899         struct bcm_sysport_cb *cb;
 900         unsigned int txbds_ready;
 901         unsigned int c_index;
 902         u32 hw_ind;
 903
 904         /* Clear status before servicing to reduce spurious interrupts */
 905         if (!ring->priv->is_lite)
 906                 intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR);
 907         else
 908                 intrl2_0_writel(ring->priv, BIT(ring->index +
 909                                 INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR);
 910
 911         /* Compute how many descriptors have been processed since last call */
 912         hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
 913         c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
 914         txbds_ready = (c_index - ring->c_index) & RING_CONS_INDEX_MASK;
 915
 916         netif_dbg(priv, tx_done, ndev,
 917                   "ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
 918                   ring->index, ring->c_index, c_index, txbds_ready);
 919
 920         while (txbds_processed < txbds_ready) {
 921                 cb = &ring->cbs[ring->clean_index];
 922                 bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl);
 923
 924                 ring->desc_count++;
 925                 txbds_processed++;
 926
 927                 if (likely(ring->clean_index < ring->size - 1))
 928                         ring->clean_index++;
 929                 else
 930                         ring->clean_index = 0;
 931         }
 932
 933         u64_stats_update_begin(&priv->syncp);
 934         ring->packets += pkts_compl;
 935         ring->bytes += bytes_compl;
 936         u64_stats_update_end(&priv->syncp);
 937
 938         ring->c_index = c_index;
 939
 940         netif_dbg(priv, tx_done, ndev,
 941                   "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
 942                   ring->index, ring->c_index, pkts_compl, bytes_compl);
 943
 944         return pkts_compl;
 945 }
 946
 947 /* Locked version of the per-ring TX reclaim routine */
 948 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 949                                            struct bcm_sysport_tx_ring *ring)
 950 {
 951         struct netdev_queue *txq;
 952         unsigned int released;
 953         unsigned long flags;
 954
 955         txq = netdev_get_tx_queue(priv->netdev, ring->index);
 956
 957         spin_lock_irqsave(&ring->lock, flags);
 958         released = __bcm_sysport_tx_reclaim(priv, ring);
 959         if (released)
 960                 netif_tx_wake_queue(txq);
 961
 962         spin_unlock_irqrestore(&ring->lock, flags);
 963
 964         return released;
 965 }
 966
 967 /* Locked version of the per-ring TX reclaim, but does not wake the queue */
 968 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv,
 969                                  struct bcm_sysport_tx_ring *ring)
 970 {
 971         unsigned long flags;
 972
 973         spin_lock_irqsave(&ring->lock, flags);
 974         __bcm_sysport_tx_reclaim(priv, ring);
 975         spin_unlock_irqrestore(&ring->lock, flags);
 976 }
 977
 978 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
 979 {
 980         struct bcm_sysport_tx_ring *ring =
 981                 container_of(napi, struct bcm_sysport_tx_ring, napi);
 982         unsigned int work_done = 0;
 983
 984         work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
 985
 986         if (work_done == 0) {
 987                 napi_complete(napi);
 988                 /* re-enable TX interrupt */
 989                 if (!ring->priv->is_lite)
 990                         intrl2_1_mask_clear(ring->priv, BIT(ring->index));
 991                 else
 992                         intrl2_0_mask_clear(ring->priv, BIT(ring->index +
 993                                             INTRL2_0_TDMA_MBDONE_SHIFT));
 994
 995                 return 0;
 996         }
 997
 998         return budget;
 999 }
1000
1001 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
1002 {
1003         unsigned int q;
1004
1005         for (q = 0; q < priv->netdev->num_tx_queues; q++)
1006                 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
1007 }
1008
1009 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
1010 {
1011         struct bcm_sysport_priv *priv =
1012                 container_of(napi, struct bcm_sysport_priv, napi);
1013         struct net_dim_sample dim_sample;
1014         unsigned int work_done = 0;
1015
1016         work_done = bcm_sysport_desc_rx(priv, budget);
1017
1018         priv->rx_c_index += work_done;
1019         priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
1020
1021         /* SYSTEMPORT Lite groups the producer/consumer index, producer is
1022          * maintained by HW, but writes to it will be ignore while RDMA
1023          * is active
1024          */
1025         if (!priv->is_lite)
1026                 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
1027         else
1028                 rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX);
1029
1030         if (work_done < budget) {
1031                 napi_complete_done(napi, work_done);
1032                 /* re-enable RX interrupts */
1033                 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
1034         }
1035
1036         if (priv->dim.use_dim) {
1037                 net_dim_sample(priv->dim.event_ctr, priv->dim.packets,
1038                                priv->dim.bytes, &dim_sample);
1039                 net_dim(&priv->dim.dim, dim_sample);
1040         }
1041
1042         return work_done;
1043 }
1044
1045 static void mpd_enable_set(struct bcm_sysport_priv *priv, bool enable)
1046 {
1047         u32 reg, bit;
1048
1049         reg = umac_readl(priv, UMAC_MPD_CTRL);
1050         if (enable)
1051                 reg |= MPD_EN;
1052         else
1053                 reg &= ~MPD_EN;
1054         umac_writel(priv, reg, UMAC_MPD_CTRL);
1055
1056         if (priv->is_lite)
1057                 bit = RBUF_ACPI_EN_LITE;
1058         else
1059                 bit = RBUF_ACPI_EN;
1060
1061         reg = rbuf_readl(priv, RBUF_CONTROL);
1062         if (enable)
1063                 reg |= bit;
1064         else
1065                 reg &= ~bit;
1066         rbuf_writel(priv, reg, RBUF_CONTROL);
1067 }
1068
1069 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
1070 {
1071         unsigned int index;
1072         u32 reg;
1073
1074         /* Disable RXCHK, active filters and Broadcom tag matching */
1075         reg = rxchk_readl(priv, RXCHK_CONTROL);
1076         reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
1077                  RXCHK_BRCM_TAG_MATCH_SHIFT | RXCHK_EN | RXCHK_BRCM_TAG_EN);
1078         rxchk_writel(priv, reg, RXCHK_CONTROL);
1079
1080         /* Make sure we restore correct CID index in case HW lost
1081          * its context during deep idle state
1082          */
1083         for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
1084                 rxchk_writel(priv, priv->filters_loc[index] <<
1085                              RXCHK_BRCM_TAG_CID_SHIFT, RXCHK_BRCM_TAG(index));
1086                 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
1087         }
1088
1089         /* Clear the MagicPacket detection logic */
1090         mpd_enable_set(priv, false);
1091
1092         reg = intrl2_0_readl(priv, INTRL2_CPU_STATUS);
1093         if (reg & INTRL2_0_MPD)
1094                 netdev_info(priv->netdev, "Wake-on-LAN (MPD) interrupt!\n");
1095
1096         if (reg & INTRL2_0_BRCM_MATCH_TAG) {
1097                 reg = rxchk_readl(priv, RXCHK_BRCM_TAG_MATCH_STATUS) &
1098                                   RXCHK_BRCM_TAG_MATCH_MASK;
1099                 netdev_info(priv->netdev,
1100                             "Wake-on-LAN (filters 0x%02x) interrupt!\n", reg);
1101         }
1102
1103         netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
1104 }
1105
1106 static void bcm_sysport_dim_work(struct work_struct *work)
1107 {
1108         struct net_dim *dim = container_of(work, struct net_dim, work);
1109         struct bcm_sysport_net_dim *ndim =
1110                         container_of(dim, struct bcm_sysport_net_dim, dim);
1111         struct bcm_sysport_priv *priv =
1112                         container_of(ndim, struct bcm_sysport_priv, dim);
1113         struct net_dim_cq_moder cur_profile =
1114                         net_dim_get_rx_moderation(dim->mode, dim->profile_ix);
1115
1116         bcm_sysport_set_rx_coalesce(priv, cur_profile.usec, cur_profile.pkts);
1117         dim->state = NET_DIM_START_MEASURE;
1118 }
1119
1120 /* RX and misc interrupt routine */
1121 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
1122 {
1123         struct net_device *dev = dev_id;
1124         struct bcm_sysport_priv *priv = netdev_priv(dev);
1125         struct bcm_sysport_tx_ring *txr;
1126         unsigned int ring, ring_bit;
1127
1128         priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
1129                           ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
1130         intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
1131
1132         if (unlikely(priv->irq0_stat == 0)) {
1133                 netdev_warn(priv->netdev, "spurious RX interrupt\n");
1134                 return IRQ_NONE;
1135         }
1136
1137         if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
1138                 priv->dim.event_ctr++;
1139                 if (likely(napi_schedule_prep(&priv->napi))) {
1140                         /* disable RX interrupts */
1141                         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
1142                         __napi_schedule_irqoff(&priv->napi);
1143                 }
1144         }
1145
1146         /* TX ring is full, perform a full reclaim since we do not know
1147          * which one would trigger this interrupt
1148          */
1149         if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
1150                 bcm_sysport_tx_reclaim_all(priv);
1151
1152         if (!priv->is_lite)
1153                 goto out;
1154
1155         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1156                 ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT);
1157                 if (!(priv->irq0_stat & ring_bit))
1158                         continue;
1159
1160                 txr = &priv->tx_rings[ring];
1161
1162                 if (likely(napi_schedule_prep(&txr->napi))) {
1163                         intrl2_0_mask_set(priv, ring_bit);
1164                         __napi_schedule(&txr->napi);
1165                 }
1166         }
1167 out:
1168         return IRQ_HANDLED;
1169 }
1170
1171 /* TX interrupt service routine */
1172 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
1173 {
1174         struct net_device *dev = dev_id;
1175         struct bcm_sysport_priv *priv = netdev_priv(dev);
1176         struct bcm_sysport_tx_ring *txr;
1177         unsigned int ring;
1178
1179         priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
1180                                 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
1181         intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1182
1183         if (unlikely(priv->irq1_stat == 0)) {
1184                 netdev_warn(priv->netdev, "spurious TX interrupt\n");
1185                 return IRQ_NONE;
1186         }
1187
1188         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1189                 if (!(priv->irq1_stat & BIT(ring)))
1190                         continue;
1191
1192                 txr = &priv->tx_rings[ring];
1193
1194                 if (likely(napi_schedule_prep(&txr->napi))) {
1195                         intrl2_1_mask_set(priv, BIT(ring));
1196                         __napi_schedule_irqoff(&txr->napi);
1197                 }
1198         }
1199
1200         return IRQ_HANDLED;
1201 }
1202
1203 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
1204 {
1205         struct bcm_sysport_priv *priv = dev_id;
1206
1207         pm_wakeup_event(&priv->pdev->dev, 0);
1208
1209         return IRQ_HANDLED;
1210 }
1211
1212 #ifdef CONFIG_NET_POLL_CONTROLLER
1213 static void bcm_sysport_poll_controller(struct net_device *dev)
1214 {
1215         struct bcm_sysport_priv *priv = netdev_priv(dev);
1216
1217         disable_irq(priv->irq0);
1218         bcm_sysport_rx_isr(priv->irq0, priv);
1219         enable_irq(priv->irq0);
1220
1221         if (!priv->is_lite) {
1222                 disable_irq(priv->irq1);
1223                 bcm_sysport_tx_isr(priv->irq1, priv);
1224                 enable_irq(priv->irq1);
1225         }
1226 }
1227 #endif
1228
1229 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
1230                                               struct net_device *dev)
1231 {
1232         struct bcm_sysport_priv *priv = netdev_priv(dev);
1233         struct sk_buff *nskb;
1234         struct bcm_tsb *tsb;
1235         u32 csum_info;
1236         u8 ip_proto;
1237         u16 csum_start;
1238         __be16 ip_ver;
1239
1240         /* Re-allocate SKB if needed */
1241         if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
1242                 nskb = skb_realloc_headroom(skb, sizeof(*tsb));
1243                 if (!nskb) {
1244                         dev_kfree_skb_any(skb);
1245                         priv->mib.tx_realloc_tsb_failed++;
1246                         dev->stats.tx_errors++;
1247                         dev->stats.tx_dropped++;
1248                         return NULL;
1249                 }
1250                 dev_consume_skb_any(skb);
1251                 skb = nskb;
1252                 priv->mib.tx_realloc_tsb++;
1253         }
1254
1255         tsb = skb_push(skb, sizeof(*tsb));
1256         /* Zero-out TSB by default */
1257         memset(tsb, 0, sizeof(*tsb));
1258
1259         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1260                 ip_ver = skb->protocol;
1261                 switch (ip_ver) {
1262                 case htons(ETH_P_IP):
1263                         ip_proto = ip_hdr(skb)->protocol;
1264                         break;
1265                 case htons(ETH_P_IPV6):
1266                         ip_proto = ipv6_hdr(skb)->nexthdr;
1267                         break;
1268                 default:
1269                         return skb;
1270                 }
1271
1272                 /* Get the checksum offset and the L4 (transport) offset */
1273                 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
1274                 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
1275                 csum_info |= (csum_start << L4_PTR_SHIFT);
1276
1277                 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1278                         csum_info |= L4_LENGTH_VALID;
1279                         if (ip_proto == IPPROTO_UDP &&
1280                             ip_ver == htons(ETH_P_IP))
1281                                 csum_info |= L4_UDP;
1282                 } else {
1283                         csum_info = 0;
1284                 }
1285
1286                 tsb->l4_ptr_dest_map = csum_info;
1287         }
1288
1289         return skb;
1290 }
1291
1292 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
1293                                     struct net_device *dev)
1294 {
1295         struct bcm_sysport_priv *priv = netdev_priv(dev);
1296         struct device *kdev = &priv->pdev->dev;
1297         struct bcm_sysport_tx_ring *ring;
1298         struct bcm_sysport_cb *cb;
1299         struct netdev_queue *txq;
1300         struct dma_desc *desc;
1301         unsigned int skb_len;
1302         unsigned long flags;
1303         dma_addr_t mapping;
1304         u32 len_status;
1305         u16 queue;
1306         int ret;
1307
1308         queue = skb_get_queue_mapping(skb);
1309         txq = netdev_get_tx_queue(dev, queue);
1310         ring = &priv->tx_rings[queue];
1311
1312         /* lock against tx reclaim in BH context and TX ring full interrupt */
1313         spin_lock_irqsave(&ring->lock, flags);
1314         if (unlikely(ring->desc_count == 0)) {
1315                 netif_tx_stop_queue(txq);
1316                 netdev_err(dev, "queue %d awake and ring full!\n", queue);
1317                 ret = NETDEV_TX_BUSY;
1318                 goto out;
1319         }
1320
1321         /* Insert TSB and checksum infos */
1322         if (priv->tsb_en) {
1323                 skb = bcm_sysport_insert_tsb(skb, dev);
1324                 if (!skb) {
1325                         ret = NETDEV_TX_OK;
1326                         goto out;
1327                 }
1328         }
1329
1330         skb_len = skb->len;
1331
1332         mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1333         if (dma_mapping_error(kdev, mapping)) {
1334                 priv->mib.tx_dma_failed++;
1335                 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
1336                           skb->data, skb_len);
1337                 ret = NETDEV_TX_OK;
1338                 goto out;
1339         }
1340
1341         /* Remember the SKB for future freeing */
1342         cb = &ring->cbs[ring->curr_desc];
1343         cb->skb = skb;
1344         dma_unmap_addr_set(cb, dma_addr, mapping);
1345         dma_unmap_len_set(cb, dma_len, skb_len);
1346
1347         /* Fetch a descriptor entry from our pool */
1348         desc = ring->desc_cpu;
1349
1350         desc->addr_lo = lower_32_bits(mapping);
1351         len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
1352         len_status |= (skb_len << DESC_LEN_SHIFT);
1353         len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
1354                        DESC_STATUS_SHIFT;
1355         if (skb->ip_summed == CHECKSUM_PARTIAL)
1356                 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1357
1358         ring->curr_desc++;
1359         if (ring->curr_desc == ring->size)
1360                 ring->curr_desc = 0;
1361         ring->desc_count--;
1362
1363         /* Ensure write completion of the descriptor status/length
1364          * in DRAM before the System Port WRITE_PORT register latches
1365          * the value
1366          */
1367         wmb();
1368         desc->addr_status_len = len_status;
1369         wmb();
1370
1371         /* Write this descriptor address to the RING write port */
1372         tdma_port_write_desc_addr(priv, desc, ring->index);
1373
1374         /* Check ring space and update SW control flow */
1375         if (ring->desc_count == 0)
1376                 netif_tx_stop_queue(txq);
1377
1378         netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
1379                   ring->index, ring->desc_count, ring->curr_desc);
1380
1381         ret = NETDEV_TX_OK;
1382 out:
1383         spin_unlock_irqrestore(&ring->lock, flags);
1384         return ret;
1385 }
1386
1387 static void bcm_sysport_tx_timeout(struct net_device *dev)
1388 {
1389         netdev_warn(dev, "transmit timeout!\n");
1390
1391         netif_trans_update(dev);
1392         dev->stats.tx_errors++;
1393
1394         netif_tx_wake_all_queues(dev);
1395 }
1396
1397 /* phylib adjust link callback */
1398 static void bcm_sysport_adj_link(struct net_device *dev)
1399 {
1400         struct bcm_sysport_priv *priv = netdev_priv(dev);
1401         struct phy_device *phydev = dev->phydev;
1402         unsigned int changed = 0;
1403         u32 cmd_bits = 0, reg;
1404
1405         if (priv->old_link != phydev->link) {
1406                 changed = 1;
1407                 priv->old_link = phydev->link;
1408         }
1409
1410         if (priv->old_duplex != phydev->duplex) {
1411                 changed = 1;
1412                 priv->old_duplex = phydev->duplex;
1413         }
1414
1415         if (priv->is_lite)
1416                 goto out;
1417
1418         switch (phydev->speed) {
1419         case SPEED_2500:
1420                 cmd_bits = CMD_SPEED_2500;
1421                 break;
1422         case SPEED_1000:
1423                 cmd_bits = CMD_SPEED_1000;
1424                 break;
1425         case SPEED_100:
1426                 cmd_bits = CMD_SPEED_100;
1427                 break;
1428         case SPEED_10:
1429                 cmd_bits = CMD_SPEED_10;
1430                 break;
1431         default:
1432                 break;
1433         }
1434         cmd_bits <<= CMD_SPEED_SHIFT;
1435
1436         if (phydev->duplex == DUPLEX_HALF)
1437                 cmd_bits |= CMD_HD_EN;
1438
1439         if (priv->old_pause != phydev->pause) {
1440                 changed = 1;
1441                 priv->old_pause = phydev->pause;
1442         }
1443
1444         if (!phydev->pause)
1445                 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1446
1447         if (!changed)
1448                 return;
1449
1450         if (phydev->link) {
1451                 reg = umac_readl(priv, UMAC_CMD);
1452                 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
1453                         CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1454                         CMD_TX_PAUSE_IGNORE);
1455                 reg |= cmd_bits;
1456                 umac_writel(priv, reg, UMAC_CMD);
1457         }
1458 out:
1459         if (changed)
1460                 phy_print_status(phydev);
1461 }
1462
1463 static void bcm_sysport_init_dim(struct bcm_sysport_priv *priv,
1464                                  void (*cb)(struct work_struct *work))
1465 {
1466         struct bcm_sysport_net_dim *dim = &priv->dim;
1467
1468         INIT_WORK(&dim->dim.work, cb);
1469         dim->dim.mode = NET_DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1470         dim->event_ctr = 0;
1471         dim->packets = 0;
1472         dim->bytes = 0;
1473 }
1474
1475 static void bcm_sysport_init_rx_coalesce(struct bcm_sysport_priv *priv)
1476 {
1477         struct bcm_sysport_net_dim *dim = &priv->dim;
1478         struct net_dim_cq_moder moder;
1479         u32 usecs, pkts;
1480
1481         usecs = priv->rx_coalesce_usecs;
1482         pkts = priv->rx_max_coalesced_frames;
1483
1484         /* If DIM was enabled, re-apply default parameters */
1485         if (dim->use_dim) {
1486                 moder = net_dim_get_def_rx_moderation(dim->dim.mode);
1487                 usecs = moder.usec;
1488                 pkts = moder.pkts;
1489         }
1490
1491         bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
1492 }
1493
1494 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1495                                     unsigned int index)
1496 {
1497         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1498         struct device *kdev = &priv->pdev->dev;
1499         size_t size;
1500         void *p;
1501         u32 reg;
1502
1503         /* Simple descriptors partitioning for now */
1504         size = 256;
1505
1506         /* We just need one DMA descriptor which is DMA-able, since writing to
1507          * the port will allocate a new descriptor in its internal linked-list
1508          */
1509         p = dma_alloc_coherent(kdev, sizeof(struct dma_desc), &ring->desc_dma,
1510                                GFP_KERNEL);
1511         if (!p) {
1512                 netif_err(priv, hw, priv->netdev, "DMA alloc failed\n");
1513                 return -ENOMEM;
1514         }
1515
1516         ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1517         if (!ring->cbs) {
1518                 dma_free_coherent(kdev, sizeof(struct dma_desc),
1519                                   ring->desc_cpu, ring->desc_dma);
1520                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1521                 return -ENOMEM;
1522         }
1523
1524         /* Initialize SW view of the ring */
1525         spin_lock_init(&ring->lock);
1526         ring->priv = priv;
1527         netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64);
1528         ring->index = index;
1529         ring->size = size;
1530         ring->clean_index = 0;
1531         ring->alloc_size = ring->size;
1532         ring->desc_cpu = p;
1533         ring->desc_count = ring->size;
1534         ring->curr_desc = 0;
1535
1536         /* Initialize HW ring */
1537         tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1538         tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1539         tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1540         tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1541
1542         /* Configure QID and port mapping */
1543         reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index));
1544         reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT);
1545         if (ring->inspect) {
1546                 reg |= ring->switch_queue & RING_QID_MASK;
1547                 reg |= ring->switch_port << RING_PORT_ID_SHIFT;
1548         } else {
1549                 reg |= RING_IGNORE_STATUS;
1550         }
1551         tdma_writel(priv, reg, TDMA_DESC_RING_MAPPING(index));
1552         tdma_writel(priv, 0, TDMA_DESC_RING_PCP_DEI_VID(index));
1553
1554         /* Enable ACB algorithm 2 */
1555         reg = tdma_readl(priv, TDMA_CONTROL);
1556         reg |= tdma_control_bit(priv, ACB_ALGO);
1557         tdma_writel(priv, reg, TDMA_CONTROL);
1558
1559         /* Do not use tdma_control_bit() here because TSB_SWAP1 collides
1560          * with the original definition of ACB_ALGO
1561          */
1562         reg = tdma_readl(priv, TDMA_CONTROL);
1563         if (priv->is_lite)
1564                 reg &= ~BIT(TSB_SWAP1);
1565         /* Set a correct TSB format based on host endian */
1566         if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1567                 reg |= tdma_control_bit(priv, TSB_SWAP0);
1568         else
1569                 reg &= ~tdma_control_bit(priv, TSB_SWAP0);
1570         tdma_writel(priv, reg, TDMA_CONTROL);
1571
1572         /* Program the number of descriptors as MAX_THRESHOLD and half of
1573          * its size for the hysteresis trigger
1574          */
1575         tdma_writel(priv, ring->size |
1576                         1 << RING_HYST_THRESH_SHIFT,
1577                         TDMA_DESC_RING_MAX_HYST(index));
1578
1579         /* Enable the ring queue in the arbiter */
1580         reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1581         reg |= (1 << index);
1582         tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1583
1584         napi_enable(&ring->napi);
1585
1586         netif_dbg(priv, hw, priv->netdev,
1587                   "TDMA cfg, size=%d, desc_cpu=%p switch q=%d,port=%d\n",
1588                   ring->size, ring->desc_cpu, ring->switch_queue,
1589                   ring->switch_port);
1590
1591         return 0;
1592 }
1593
1594 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1595                                      unsigned int index)
1596 {
1597         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1598         struct device *kdev = &priv->pdev->dev;
1599         u32 reg;
1600
1601         /* Caller should stop the TDMA engine */
1602         reg = tdma_readl(priv, TDMA_STATUS);
1603         if (!(reg & TDMA_DISABLED))
1604                 netdev_warn(priv->netdev, "TDMA not stopped!\n");
1605
1606         /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1607          * fail, so by checking this pointer we know whether the TX ring was
1608          * fully initialized or not.
1609          */
1610         if (!ring->cbs)
1611                 return;
1612
1613         napi_disable(&ring->napi);
1614         netif_napi_del(&ring->napi);
1615
1616         bcm_sysport_tx_clean(priv, ring);
1617
1618         kfree(ring->cbs);
1619         ring->cbs = NULL;
1620
1621         if (ring->desc_dma) {
1622                 dma_free_coherent(kdev, sizeof(struct dma_desc),
1623                                   ring->desc_cpu, ring->desc_dma);
1624                 ring->desc_dma = 0;
1625         }
1626         ring->size = 0;
1627         ring->alloc_size = 0;
1628
1629         netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1630 }
1631
1632 /* RDMA helper */
1633 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1634                                   unsigned int enable)
1635 {
1636         unsigned int timeout = 1000;
1637         u32 reg;
1638
1639         reg = rdma_readl(priv, RDMA_CONTROL);
1640         if (enable)
1641                 reg |= RDMA_EN;
1642         else
1643                 reg &= ~RDMA_EN;
1644         rdma_writel(priv, reg, RDMA_CONTROL);
1645
1646         /* Poll for RMDA disabling completion */
1647         do {
1648                 reg = rdma_readl(priv, RDMA_STATUS);
1649                 if (!!(reg & RDMA_DISABLED) == !enable)
1650                         return 0;
1651                 usleep_range(1000, 2000);
1652         } while (timeout-- > 0);
1653
1654         netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1655
1656         return -ETIMEDOUT;
1657 }
1658
1659 /* TDMA helper */
1660 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1661                                   unsigned int enable)
1662 {
1663         unsigned int timeout = 1000;
1664         u32 reg;
1665
1666         reg = tdma_readl(priv, TDMA_CONTROL);
1667         if (enable)
1668                 reg |= tdma_control_bit(priv, TDMA_EN);
1669         else
1670                 reg &= ~tdma_control_bit(priv, TDMA_EN);
1671         tdma_writel(priv, reg, TDMA_CONTROL);
1672
1673         /* Poll for TMDA disabling completion */
1674         do {
1675                 reg = tdma_readl(priv, TDMA_STATUS);
1676                 if (!!(reg & TDMA_DISABLED) == !enable)
1677                         return 0;
1678
1679                 usleep_range(1000, 2000);
1680         } while (timeout-- > 0);
1681
1682         netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1683
1684         return -ETIMEDOUT;
1685 }
1686
1687 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1688 {
1689         struct bcm_sysport_cb *cb;
1690         u32 reg;
1691         int ret;
1692         int i;
1693
1694         /* Initialize SW view of the RX ring */
1695         priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC;
1696         priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1697         priv->rx_c_index = 0;
1698         priv->rx_read_ptr = 0;
1699         priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1700                                 GFP_KERNEL);
1701         if (!priv->rx_cbs) {
1702                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1703                 return -ENOMEM;
1704         }
1705
1706         for (i = 0; i < priv->num_rx_bds; i++) {
1707                 cb = priv->rx_cbs + i;
1708                 cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1709         }
1710
1711         ret = bcm_sysport_alloc_rx_bufs(priv);
1712         if (ret) {
1713                 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1714                 return ret;
1715         }
1716
1717         /* Initialize HW, ensure RDMA is disabled */
1718         reg = rdma_readl(priv, RDMA_STATUS);
1719         if (!(reg & RDMA_DISABLED))
1720                 rdma_enable_set(priv, 0);
1721
1722         rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1723         rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1724         rdma_writel(priv, 0, RDMA_PROD_INDEX);
1725         rdma_writel(priv, 0, RDMA_CONS_INDEX);
1726         rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1727                           RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1728         /* Operate the queue in ring mode */
1729         rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1730         rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1731         rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1732         rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO);
1733
1734         netif_dbg(priv, hw, priv->netdev,
1735                   "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1736                   priv->num_rx_bds, priv->rx_bds);
1737
1738         return 0;
1739 }
1740
1741 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1742 {
1743         struct bcm_sysport_cb *cb;
1744         unsigned int i;
1745         u32 reg;
1746
1747         /* Caller should ensure RDMA is disabled */
1748         reg = rdma_readl(priv, RDMA_STATUS);
1749         if (!(reg & RDMA_DISABLED))
1750                 netdev_warn(priv->netdev, "RDMA not stopped!\n");
1751
1752         for (i = 0; i < priv->num_rx_bds; i++) {
1753                 cb = &priv->rx_cbs[i];
1754                 if (dma_unmap_addr(cb, dma_addr))
1755                         dma_unmap_single(&priv->pdev->dev,
1756                                          dma_unmap_addr(cb, dma_addr),
1757                                          RX_BUF_LENGTH, DMA_FROM_DEVICE);
1758                 bcm_sysport_free_cb(cb);
1759         }
1760
1761         kfree(priv->rx_cbs);
1762         priv->rx_cbs = NULL;
1763
1764         netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1765 }
1766
1767 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1768 {
1769         struct bcm_sysport_priv *priv = netdev_priv(dev);
1770         u32 reg;
1771
1772         if (priv->is_lite)
1773                 return;
1774
1775         reg = umac_readl(priv, UMAC_CMD);
1776         if (dev->flags & IFF_PROMISC)
1777                 reg |= CMD_PROMISC;
1778         else
1779                 reg &= ~CMD_PROMISC;
1780         umac_writel(priv, reg, UMAC_CMD);
1781
1782         /* No support for ALLMULTI */
1783         if (dev->flags & IFF_ALLMULTI)
1784                 return;
1785 }
1786
1787 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1788                                    u32 mask, unsigned int enable)
1789 {
1790         u32 reg;
1791
1792         if (!priv->is_lite) {
1793                 reg = umac_readl(priv, UMAC_CMD);
1794                 if (enable)
1795                         reg |= mask;
1796                 else
1797                         reg &= ~mask;
1798                 umac_writel(priv, reg, UMAC_CMD);
1799         } else {
1800                 reg = gib_readl(priv, GIB_CONTROL);
1801                 if (enable)
1802                         reg |= mask;
1803                 else
1804                         reg &= ~mask;
1805                 gib_writel(priv, reg, GIB_CONTROL);
1806         }
1807
1808         /* UniMAC stops on a packet boundary, wait for a full-sized packet
1809          * to be processed (1 msec).
1810          */
1811         if (enable == 0)
1812                 usleep_range(1000, 2000);
1813 }
1814
1815 static inline void umac_reset(struct bcm_sysport_priv *priv)
1816 {
1817         u32 reg;
1818
1819         if (priv->is_lite)
1820                 return;
1821
1822         reg = umac_readl(priv, UMAC_CMD);
1823         reg |= CMD_SW_RESET;
1824         umac_writel(priv, reg, UMAC_CMD);
1825         udelay(10);
1826         reg = umac_readl(priv, UMAC_CMD);
1827         reg &= ~CMD_SW_RESET;
1828         umac_writel(priv, reg, UMAC_CMD);
1829 }
1830
1831 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1832                              unsigned char *addr)
1833 {
1834         u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) |
1835                     addr[3];
1836         u32 mac1 = (addr[4] << 8) | addr[5];
1837
1838         if (!priv->is_lite) {
1839                 umac_writel(priv, mac0, UMAC_MAC0);
1840                 umac_writel(priv, mac1, UMAC_MAC1);
1841         } else {
1842                 gib_writel(priv, mac0, GIB_MAC0);
1843                 gib_writel(priv, mac1, GIB_MAC1);
1844         }
1845 }
1846
1847 static void topctrl_flush(struct bcm_sysport_priv *priv)
1848 {
1849         topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1850         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1851         mdelay(1);
1852         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1853         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1854 }
1855
1856 static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1857 {
1858         struct bcm_sysport_priv *priv = netdev_priv(dev);
1859         struct sockaddr *addr = p;
1860
1861         if (!is_valid_ether_addr(addr->sa_data))
1862                 return -EINVAL;
1863
1864         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1865
1866         /* interface is disabled, changes to MAC will be reflected on next
1867          * open call
1868          */
1869         if (!netif_running(dev))
1870                 return 0;
1871
1872         umac_set_hw_addr(priv, dev->dev_addr);
1873
1874         return 0;
1875 }
1876
1877 static void bcm_sysport_get_stats64(struct net_device *dev,
1878                                     struct rtnl_link_stats64 *stats)
1879 {
1880         struct bcm_sysport_priv *priv = netdev_priv(dev);
1881         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
1882         unsigned int start;
1883
1884         netdev_stats_to_stats64(stats, &dev->stats);
1885
1886         bcm_sysport_update_tx_stats(priv, &stats->tx_bytes,
1887                                     &stats->tx_packets);
1888
1889         do {
1890                 start = u64_stats_fetch_begin_irq(&priv->syncp);
1891                 stats->rx_packets = stats64->rx_packets;
1892                 stats->rx_bytes = stats64->rx_bytes;
1893         } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
1894 }
1895
1896 static void bcm_sysport_netif_start(struct net_device *dev)
1897 {
1898         struct bcm_sysport_priv *priv = netdev_priv(dev);
1899
1900         /* Enable NAPI */
1901         bcm_sysport_init_dim(priv, bcm_sysport_dim_work);
1902         bcm_sysport_init_rx_coalesce(priv);
1903         napi_enable(&priv->napi);
1904
1905         /* Enable RX interrupt and TX ring full interrupt */
1906         intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1907
1908         phy_start(dev->phydev);
1909
1910         /* Enable TX interrupts for the TXQs */
1911         if (!priv->is_lite)
1912                 intrl2_1_mask_clear(priv, 0xffffffff);
1913         else
1914                 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK);
1915 }
1916
1917 static void rbuf_init(struct bcm_sysport_priv *priv)
1918 {
1919         u32 reg;
1920
1921         reg = rbuf_readl(priv, RBUF_CONTROL);
1922         reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1923         /* Set a correct RSB format on SYSTEMPORT Lite */
1924         if (priv->is_lite)
1925                 reg &= ~RBUF_RSB_SWAP1;
1926
1927         /* Set a correct RSB format based on host endian */
1928         if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1929                 reg |= RBUF_RSB_SWAP0;
1930         else
1931                 reg &= ~RBUF_RSB_SWAP0;
1932         rbuf_writel(priv, reg, RBUF_CONTROL);
1933 }
1934
1935 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv)
1936 {
1937         intrl2_0_mask_set(priv, 0xffffffff);
1938         intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1939         if (!priv->is_lite) {
1940                 intrl2_1_mask_set(priv, 0xffffffff);
1941                 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1942         }
1943 }
1944
1945 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv)
1946 {
1947         u32 reg;
1948
1949         reg = gib_readl(priv, GIB_CONTROL);
1950         /* Include Broadcom tag in pad extension and fix up IPG_LENGTH */
1951         if (netdev_uses_dsa(priv->netdev)) {
1952                 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT);
1953                 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT;
1954         }
1955         reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT);
1956         reg |= 12 << GIB_IPG_LEN_SHIFT;
1957         gib_writel(priv, reg, GIB_CONTROL);
1958 }
1959
1960 static int bcm_sysport_open(struct net_device *dev)
1961 {
1962         struct bcm_sysport_priv *priv = netdev_priv(dev);
1963         struct phy_device *phydev;
1964         unsigned int i;
1965         int ret;
1966
1967         /* Reset UniMAC */
1968         umac_reset(priv);
1969
1970         /* Flush TX and RX FIFOs at TOPCTRL level */
1971         topctrl_flush(priv);
1972
1973         /* Disable the UniMAC RX/TX */
1974         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1975
1976         /* Enable RBUF 2bytes alignment and Receive Status Block */
1977         rbuf_init(priv);
1978
1979         /* Set maximum frame length */
1980         if (!priv->is_lite)
1981                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1982         else
1983                 gib_set_pad_extension(priv);
1984
1985         /* Apply features again in case we changed them while interface was
1986          * down
1987          */
1988         bcm_sysport_set_features(dev, dev->features);
1989
1990         /* Set MAC address */
1991         umac_set_hw_addr(priv, dev->dev_addr);
1992
1993         phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1994                                 0, priv->phy_interface);
1995         if (!phydev) {
1996                 netdev_err(dev, "could not attach to PHY\n");
1997                 return -ENODEV;
1998         }
1999
2000         /* Reset house keeping link status */
2001         priv->old_duplex = -1;
2002         priv->old_link = -1;
2003         priv->old_pause = -1;
2004
2005         /* mask all interrupts and request them */
2006         bcm_sysport_mask_all_intrs(priv);
2007
2008         ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
2009         if (ret) {
2010                 netdev_err(dev, "failed to request RX interrupt\n");
2011                 goto out_phy_disconnect;
2012         }
2013
2014         if (!priv->is_lite) {
2015                 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0,
2016                                   dev->name, dev);
2017                 if (ret) {
2018                         netdev_err(dev, "failed to request TX interrupt\n");
2019                         goto out_free_irq0;
2020                 }
2021         }
2022
2023         /* Initialize both hardware and software ring */
2024         for (i = 0; i < dev->num_tx_queues; i++) {
2025                 ret = bcm_sysport_init_tx_ring(priv, i);
2026                 if (ret) {
2027                         netdev_err(dev, "failed to initialize TX ring %d\n",
2028                                    i);
2029                         goto out_free_tx_ring;
2030                 }
2031         }
2032
2033         /* Initialize linked-list */
2034         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2035
2036         /* Initialize RX ring */
2037         ret = bcm_sysport_init_rx_ring(priv);
2038         if (ret) {
2039                 netdev_err(dev, "failed to initialize RX ring\n");
2040                 goto out_free_rx_ring;
2041         }
2042
2043         /* Turn on RDMA */
2044         ret = rdma_enable_set(priv, 1);
2045         if (ret)
2046                 goto out_free_rx_ring;
2047
2048         /* Turn on TDMA */
2049         ret = tdma_enable_set(priv, 1);
2050         if (ret)
2051                 goto out_clear_rx_int;
2052
2053         /* Turn on UniMAC TX/RX */
2054         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
2055
2056         bcm_sysport_netif_start(dev);
2057
2058         netif_tx_start_all_queues(dev);
2059
2060         return 0;
2061
2062 out_clear_rx_int:
2063         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
2064 out_free_rx_ring:
2065         bcm_sysport_fini_rx_ring(priv);
2066 out_free_tx_ring:
2067         for (i = 0; i < dev->num_tx_queues; i++)
2068                 bcm_sysport_fini_tx_ring(priv, i);
2069         if (!priv->is_lite)
2070                 free_irq(priv->irq1, dev);
2071 out_free_irq0:
2072         free_irq(priv->irq0, dev);
2073 out_phy_disconnect:
2074         phy_disconnect(phydev);
2075         return ret;
2076 }
2077
2078 static void bcm_sysport_netif_stop(struct net_device *dev)
2079 {
2080         struct bcm_sysport_priv *priv = netdev_priv(dev);
2081
2082         /* stop all software from updating hardware */
2083         netif_tx_disable(dev);
2084         napi_disable(&priv->napi);
2085         cancel_work_sync(&priv->dim.dim.work);
2086         phy_stop(dev->phydev);
2087
2088         /* mask all interrupts */
2089         bcm_sysport_mask_all_intrs(priv);
2090 }
2091
2092 static int bcm_sysport_stop(struct net_device *dev)
2093 {
2094         struct bcm_sysport_priv *priv = netdev_priv(dev);
2095         unsigned int i;
2096         int ret;
2097
2098         bcm_sysport_netif_stop(dev);
2099
2100         /* Disable UniMAC RX */
2101         umac_enable_set(priv, CMD_RX_EN, 0);
2102
2103         ret = tdma_enable_set(priv, 0);
2104         if (ret) {
2105                 netdev_err(dev, "timeout disabling RDMA\n");
2106                 return ret;
2107         }
2108
2109         /* Wait for a maximum packet size to be drained */
2110         usleep_range(2000, 3000);
2111
2112         ret = rdma_enable_set(priv, 0);
2113         if (ret) {
2114                 netdev_err(dev, "timeout disabling TDMA\n");
2115                 return ret;
2116         }
2117
2118         /* Disable UniMAC TX */
2119         umac_enable_set(priv, CMD_TX_EN, 0);
2120
2121         /* Free RX/TX rings SW structures */
2122         for (i = 0; i < dev->num_tx_queues; i++)
2123                 bcm_sysport_fini_tx_ring(priv, i);
2124         bcm_sysport_fini_rx_ring(priv);
2125
2126         free_irq(priv->irq0, dev);
2127         if (!priv->is_lite)
2128                 free_irq(priv->irq1, dev);
2129
2130         /* Disconnect from PHY */
2131         phy_disconnect(dev->phydev);
2132
2133         return 0;
2134 }
2135
2136 static int bcm_sysport_rule_find(struct bcm_sysport_priv *priv,
2137                                  u64 location)
2138 {
2139         unsigned int index;
2140         u32 reg;
2141
2142         for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2143                 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2144                 reg >>= RXCHK_BRCM_TAG_CID_SHIFT;
2145                 reg &= RXCHK_BRCM_TAG_CID_MASK;
2146                 if (reg == location)
2147                         return index;
2148         }
2149
2150         return -EINVAL;
2151 }
2152
2153 static int bcm_sysport_rule_get(struct bcm_sysport_priv *priv,
2154                                 struct ethtool_rxnfc *nfc)
2155 {
2156         int index;
2157
2158         /* This is not a rule that we know about */
2159         index = bcm_sysport_rule_find(priv, nfc->fs.location);
2160         if (index < 0)
2161                 return -EOPNOTSUPP;
2162
2163         nfc->fs.ring_cookie = RX_CLS_FLOW_WAKE;
2164
2165         return 0;
2166 }
2167
2168 static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv,
2169                                 struct ethtool_rxnfc *nfc)
2170 {
2171         unsigned int index;
2172         u32 reg;
2173
2174         /* We cannot match locations greater than what the classification ID
2175          * permits (256 entries)
2176          */
2177         if (nfc->fs.location > RXCHK_BRCM_TAG_CID_MASK)
2178                 return -E2BIG;
2179
2180         /* We cannot support flows that are not destined for a wake-up */
2181         if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE)
2182                 return -EOPNOTSUPP;
2183
2184         /* All filters are already in use, we cannot match more rules */
2185         if (bitmap_weight(priv->filters, RXCHK_BRCM_TAG_MAX) ==
2186             RXCHK_BRCM_TAG_MAX)
2187                 return -ENOSPC;
2188
2189         index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX);
2190         if (index > RXCHK_BRCM_TAG_MAX)
2191                 return -ENOSPC;
2192
2193         /* Location is the classification ID, and index is the position
2194          * within one of our 8 possible filters to be programmed
2195          */
2196         reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2197         reg &= ~(RXCHK_BRCM_TAG_CID_MASK << RXCHK_BRCM_TAG_CID_SHIFT);
2198         reg |= nfc->fs.location << RXCHK_BRCM_TAG_CID_SHIFT;
2199         rxchk_writel(priv, reg, RXCHK_BRCM_TAG(index));
2200         rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
2201
2202         priv->filters_loc[index] = nfc->fs.location;
2203         set_bit(index, priv->filters);
2204
2205         return 0;
2206 }
2207
2208 static int bcm_sysport_rule_del(struct bcm_sysport_priv *priv,
2209                                 u64 location)
2210 {
2211         int index;
2212
2213         /* This is not a rule that we know about */
2214         index = bcm_sysport_rule_find(priv, location);
2215         if (index < 0)
2216                 return -EOPNOTSUPP;
2217
2218         /* No need to disable this filter if it was enabled, this will
2219          * be taken care of during suspend time by bcm_sysport_suspend_to_wol
2220          */
2221         clear_bit(index, priv->filters);
2222         priv->filters_loc[index] = 0;
2223
2224         return 0;
2225 }
2226
2227 static int bcm_sysport_get_rxnfc(struct net_device *dev,
2228                                  struct ethtool_rxnfc *nfc, u32 *rule_locs)
2229 {
2230         struct bcm_sysport_priv *priv = netdev_priv(dev);
2231         int ret = -EOPNOTSUPP;
2232
2233         switch (nfc->cmd) {
2234         case ETHTOOL_GRXCLSRULE:
2235                 ret = bcm_sysport_rule_get(priv, nfc);
2236                 break;
2237         default:
2238                 break;
2239         }
2240
2241         return ret;
2242 }
2243
2244 static int bcm_sysport_set_rxnfc(struct net_device *dev,
2245                                  struct ethtool_rxnfc *nfc)
2246 {
2247         struct bcm_sysport_priv *priv = netdev_priv(dev);
2248         int ret = -EOPNOTSUPP;
2249
2250         switch (nfc->cmd) {
2251         case ETHTOOL_SRXCLSRLINS:
2252                 ret = bcm_sysport_rule_set(priv, nfc);
2253                 break;
2254         case ETHTOOL_SRXCLSRLDEL:
2255                 ret = bcm_sysport_rule_del(priv, nfc->fs.location);
2256                 break;
2257         default:
2258                 break;
2259         }
2260
2261         return ret;
2262 }
2263
2264 static const struct ethtool_ops bcm_sysport_ethtool_ops = {
2265         .get_drvinfo            = bcm_sysport_get_drvinfo,
2266         .get_msglevel           = bcm_sysport_get_msglvl,
2267         .set_msglevel           = bcm_sysport_set_msglvl,
2268         .get_link               = ethtool_op_get_link,
2269         .get_strings            = bcm_sysport_get_strings,
2270         .get_ethtool_stats      = bcm_sysport_get_stats,
2271         .get_sset_count         = bcm_sysport_get_sset_count,
2272         .get_wol                = bcm_sysport_get_wol,
2273         .set_wol                = bcm_sysport_set_wol,
2274         .get_coalesce           = bcm_sysport_get_coalesce,
2275         .set_coalesce           = bcm_sysport_set_coalesce,
2276         .get_link_ksettings     = phy_ethtool_get_link_ksettings,
2277         .set_link_ksettings     = phy_ethtool_set_link_ksettings,
2278         .get_rxnfc              = bcm_sysport_get_rxnfc,
2279         .set_rxnfc              = bcm_sysport_set_rxnfc,
2280 };
2281
2282 static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb,
2283                                     struct net_device *sb_dev,
2284                                     select_queue_fallback_t fallback)
2285 {
2286         struct bcm_sysport_priv *priv = netdev_priv(dev);
2287         u16 queue = skb_get_queue_mapping(skb);
2288         struct bcm_sysport_tx_ring *tx_ring;
2289         unsigned int q, port;
2290
2291         if (!netdev_uses_dsa(dev))
2292                 return fallback(dev, skb, NULL);
2293
2294         /* DSA tagging layer will have configured the correct queue */
2295         q = BRCM_TAG_GET_QUEUE(queue);
2296         port = BRCM_TAG_GET_PORT(queue);
2297         tx_ring = priv->ring_map[q + port * priv->per_port_num_tx_queues];
2298
2299         if (unlikely(!tx_ring))
2300                 return fallback(dev, skb, NULL);
2301
2302         return tx_ring->index;
2303 }
2304
2305 static const struct net_device_ops bcm_sysport_netdev_ops = {
2306         .ndo_start_xmit         = bcm_sysport_xmit,
2307         .ndo_tx_timeout         = bcm_sysport_tx_timeout,
2308         .ndo_open               = bcm_sysport_open,
2309         .ndo_stop               = bcm_sysport_stop,
2310         .ndo_set_features       = bcm_sysport_set_features,
2311         .ndo_set_rx_mode        = bcm_sysport_set_rx_mode,
2312         .ndo_set_mac_address    = bcm_sysport_change_mac,
2313 #ifdef CONFIG_NET_POLL_CONTROLLER
2314         .ndo_poll_controller    = bcm_sysport_poll_controller,
2315 #endif
2316         .ndo_get_stats64        = bcm_sysport_get_stats64,
2317         .ndo_select_queue       = bcm_sysport_select_queue,
2318 };
2319
2320 static int bcm_sysport_map_queues(struct notifier_block *nb,
2321                                   struct dsa_notifier_register_info *info)
2322 {
2323         struct bcm_sysport_tx_ring *ring;
2324         struct bcm_sysport_priv *priv;
2325         struct net_device *slave_dev;
2326         unsigned int num_tx_queues;
2327         unsigned int q, qp, port;
2328         struct net_device *dev;
2329
2330         priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2331         if (priv->netdev != info->master)
2332                 return 0;
2333
2334         dev = info->master;
2335
2336         /* We can't be setting up queue inspection for non directly attached
2337          * switches
2338          */
2339         if (info->switch_number)
2340                 return 0;
2341
2342         if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2343                 return 0;
2344
2345         port = info->port_number;
2346         slave_dev = info->info.dev;
2347
2348         /* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a
2349          * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of
2350          * per-port (slave_dev) network devices queue, we achieve just that.
2351          * This need to happen now before any slave network device is used such
2352          * it accurately reflects the number of real TX queues.
2353          */
2354         if (priv->is_lite)
2355                 netif_set_real_num_tx_queues(slave_dev,
2356                                              slave_dev->num_tx_queues / 2);
2357
2358         num_tx_queues = slave_dev->real_num_tx_queues;
2359
2360         if (priv->per_port_num_tx_queues &&
2361             priv->per_port_num_tx_queues != num_tx_queues)
2362                 netdev_warn(slave_dev, "asymmetric number of per-port queues\n");
2363
2364         priv->per_port_num_tx_queues = num_tx_queues;
2365
2366         for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues;
2367              q++) {
2368                 ring = &priv->tx_rings[q];
2369
2370                 if (ring->inspect)
2371                         continue;
2372
2373                 /* Just remember the mapping actual programming done
2374                  * during bcm_sysport_init_tx_ring
2375                  */
2376                 ring->switch_queue = qp;
2377                 ring->switch_port = port;
2378                 ring->inspect = true;
2379                 priv->ring_map[q + port * num_tx_queues] = ring;
2380                 qp++;
2381         }
2382
2383         return 0;
2384 }
2385
2386 static int bcm_sysport_unmap_queues(struct notifier_block *nb,
2387                                     struct dsa_notifier_register_info *info)
2388 {
2389         struct bcm_sysport_tx_ring *ring;
2390         struct bcm_sysport_priv *priv;
2391         struct net_device *slave_dev;
2392         unsigned int num_tx_queues;
2393         struct net_device *dev;
2394         unsigned int q, port;
2395
2396         priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2397         if (priv->netdev != info->master)
2398                 return 0;
2399
2400         dev = info->master;
2401
2402         if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2403                 return 0;
2404
2405         port = info->port_number;
2406         slave_dev = info->info.dev;
2407
2408         num_tx_queues = slave_dev->real_num_tx_queues;
2409
2410         for (q = 0; q < dev->num_tx_queues; q++) {
2411                 ring = &priv->tx_rings[q];
2412
2413                 if (ring->switch_port != port)
2414                         continue;
2415
2416                 if (!ring->inspect)
2417                         continue;
2418
2419                 ring->inspect = false;
2420                 priv->ring_map[q + port * num_tx_queues] = NULL;
2421         }
2422
2423         return 0;
2424 }
2425
2426 static int bcm_sysport_dsa_notifier(struct notifier_block *nb,
2427                                     unsigned long event, void *ptr)
2428 {
2429         int ret = NOTIFY_DONE;
2430
2431         switch (event) {
2432         case DSA_PORT_REGISTER:
2433                 ret = bcm_sysport_map_queues(nb, ptr);
2434                 break;
2435         case DSA_PORT_UNREGISTER:
2436                 ret = bcm_sysport_unmap_queues(nb, ptr);
2437                 break;
2438         }
2439
2440         return notifier_from_errno(ret);
2441 }
2442
2443 #define REV_FMT "v%2x.%02x"
2444
2445 static const struct bcm_sysport_hw_params bcm_sysport_params[] = {
2446         [SYSTEMPORT] = {
2447                 .is_lite = false,
2448                 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS,
2449         },
2450         [SYSTEMPORT_LITE] = {
2451                 .is_lite = true,
2452                 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS,
2453         },
2454 };
2455
2456 static const struct of_device_id bcm_sysport_of_match[] = {
2457         { .compatible = "brcm,systemportlite-v1.00",
2458           .data = &bcm_sysport_params[SYSTEMPORT_LITE] },
2459         { .compatible = "brcm,systemport-v1.00",
2460           .data = &bcm_sysport_params[SYSTEMPORT] },
2461         { .compatible = "brcm,systemport",
2462           .data = &bcm_sysport_params[SYSTEMPORT] },
2463         { /* sentinel */ }
2464 };
2465 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
2466
2467 static int bcm_sysport_probe(struct platform_device *pdev)
2468 {
2469         const struct bcm_sysport_hw_params *params;
2470         const struct of_device_id *of_id = NULL;
2471         struct bcm_sysport_priv *priv;
2472         struct device_node *dn;
2473         struct net_device *dev;
2474         const void *macaddr;
2475         struct resource *r;
2476         u32 txq, rxq;
2477         int ret;
2478
2479         dn = pdev->dev.of_node;
2480         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2481         of_id = of_match_node(bcm_sysport_of_match, dn);
2482         if (!of_id || !of_id->data)
2483                 return -EINVAL;
2484
2485         /* Fairly quickly we need to know the type of adapter we have */
2486         params = of_id->data;
2487
2488         /* Read the Transmit/Receive Queue properties */
2489         if (of_property_read_u32(dn, "systemport,num-txq", &txq))
2490                 txq = TDMA_NUM_RINGS;
2491         if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
2492                 rxq = 1;
2493
2494         /* Sanity check the number of transmit queues */
2495         if (!txq || txq > TDMA_NUM_RINGS)
2496                 return -EINVAL;
2497
2498         dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
2499         if (!dev)
2500                 return -ENOMEM;
2501
2502         /* Initialize private members */
2503         priv = netdev_priv(dev);
2504
2505         /* Allocate number of TX rings */
2506         priv->tx_rings = devm_kcalloc(&pdev->dev, txq,
2507                                       sizeof(struct bcm_sysport_tx_ring),
2508                                       GFP_KERNEL);
2509         if (!priv->tx_rings)
2510                 return -ENOMEM;
2511
2512         priv->is_lite = params->is_lite;
2513         priv->num_rx_desc_words = params->num_rx_desc_words;
2514
2515         priv->irq0 = platform_get_irq(pdev, 0);
2516         if (!priv->is_lite) {
2517                 priv->irq1 = platform_get_irq(pdev, 1);
2518                 priv->wol_irq = platform_get_irq(pdev, 2);
2519         } else {
2520                 priv->wol_irq = platform_get_irq(pdev, 1);
2521         }
2522         if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) {
2523                 dev_err(&pdev->dev, "invalid interrupts\n");
2524                 ret = -EINVAL;
2525                 goto err_free_netdev;
2526         }
2527
2528         priv->base = devm_ioremap_resource(&pdev->dev, r);
2529         if (IS_ERR(priv->base)) {
2530                 ret = PTR_ERR(priv->base);
2531                 goto err_free_netdev;
2532         }
2533
2534         priv->netdev = dev;
2535         priv->pdev = pdev;
2536
2537         priv->phy_interface = of_get_phy_mode(dn);
2538         /* Default to GMII interface mode */
2539         if (priv->phy_interface < 0)
2540                 priv->phy_interface = PHY_INTERFACE_MODE_GMII;
2541
2542         /* In the case of a fixed PHY, the DT node associated
2543          * to the PHY is the Ethernet MAC DT node.
2544          */
2545         if (of_phy_is_fixed_link(dn)) {
2546                 ret = of_phy_register_fixed_link(dn);
2547                 if (ret) {
2548                         dev_err(&pdev->dev, "failed to register fixed PHY\n");
2549                         goto err_free_netdev;
2550                 }
2551
2552                 priv->phy_dn = dn;
2553         }
2554
2555         /* Initialize netdevice members */
2556         macaddr = of_get_mac_address(dn);
2557         if (!macaddr || !is_valid_ether_addr(macaddr)) {
2558                 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
2559                 eth_hw_addr_random(dev);
2560         } else {
2561                 ether_addr_copy(dev->dev_addr, macaddr);
2562         }
2563
2564         SET_NETDEV_DEV(dev, &pdev->dev);
2565         dev_set_drvdata(&pdev->dev, dev);
2566         dev->ethtool_ops = &bcm_sysport_ethtool_ops;
2567         dev->netdev_ops = &bcm_sysport_netdev_ops;
2568         netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64);
2569
2570         dev->features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
2571                          NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2572         dev->hw_features |= dev->features;
2573         dev->vlan_features |= dev->features;
2574
2575         /* Request the WOL interrupt and advertise suspend if available */
2576         priv->wol_irq_disabled = 1;
2577         ret = devm_request_irq(&pdev->dev, priv->wol_irq,
2578                                bcm_sysport_wol_isr, 0, dev->name, priv);
2579         if (!ret)
2580                 device_set_wakeup_capable(&pdev->dev, 1);
2581
2582         /* Set the needed headroom once and for all */
2583         BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
2584         dev->needed_headroom += sizeof(struct bcm_tsb);
2585
2586         /* libphy will adjust the link state accordingly */
2587         netif_carrier_off(dev);
2588
2589         priv->rx_max_coalesced_frames = 1;
2590         u64_stats_init(&priv->syncp);
2591
2592         priv->dsa_notifier.notifier_call = bcm_sysport_dsa_notifier;
2593
2594         ret = register_dsa_notifier(&priv->dsa_notifier);
2595         if (ret) {
2596                 dev_err(&pdev->dev, "failed to register DSA notifier\n");
2597                 goto err_deregister_fixed_link;
2598         }
2599
2600         ret = register_netdev(dev);
2601         if (ret) {
2602                 dev_err(&pdev->dev, "failed to register net_device\n");
2603                 goto err_deregister_notifier;
2604         }
2605
2606         priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
2607         dev_info(&pdev->dev,
2608                  "Broadcom SYSTEMPORT%s" REV_FMT
2609                  " at 0x%p (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
2610                  priv->is_lite ? " Lite" : "",
2611                  (priv->rev >> 8) & 0xff, priv->rev & 0xff,
2612                  priv->base, priv->irq0, priv->irq1, txq, rxq);
2613
2614         return 0;
2615
2616 err_deregister_notifier:
2617         unregister_dsa_notifier(&priv->dsa_notifier);
2618 err_deregister_fixed_link:
2619         if (of_phy_is_fixed_link(dn))
2620                 of_phy_deregister_fixed_link(dn);
2621 err_free_netdev:
2622         free_netdev(dev);
2623         return ret;
2624 }
2625
2626 static int bcm_sysport_remove(struct platform_device *pdev)
2627 {
2628         struct net_device *dev = dev_get_drvdata(&pdev->dev);
2629         struct bcm_sysport_priv *priv = netdev_priv(dev);
2630         struct device_node *dn = pdev->dev.of_node;
2631
2632         /* Not much to do, ndo_close has been called
2633          * and we use managed allocations
2634          */
2635         unregister_dsa_notifier(&priv->dsa_notifier);
2636         unregister_netdev(dev);
2637         if (of_phy_is_fixed_link(dn))
2638                 of_phy_deregister_fixed_link(dn);
2639         free_netdev(dev);
2640         dev_set_drvdata(&pdev->dev, NULL);
2641
2642         return 0;
2643 }
2644
2645 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
2646 {
2647         struct net_device *ndev = priv->netdev;
2648         unsigned int timeout = 1000;
2649         unsigned int index, i = 0;
2650         u32 reg;
2651
2652         /* Password has already been programmed */
2653         reg = umac_readl(priv, UMAC_MPD_CTRL);
2654         if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE))
2655                 reg |= MPD_EN;
2656         reg &= ~PSW_EN;
2657         if (priv->wolopts & WAKE_MAGICSECURE)
2658                 reg |= PSW_EN;
2659         umac_writel(priv, reg, UMAC_MPD_CTRL);
2660
2661         if (priv->wolopts & WAKE_FILTER) {
2662                 /* Turn on ACPI matching to steal packets from RBUF */
2663                 reg = rbuf_readl(priv, RBUF_CONTROL);
2664                 if (priv->is_lite)
2665                         reg |= RBUF_ACPI_EN_LITE;
2666                 else
2667                         reg |= RBUF_ACPI_EN;
2668                 rbuf_writel(priv, reg, RBUF_CONTROL);
2669
2670                 /* Enable RXCHK, active filters and Broadcom tag matching */
2671                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2672                 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
2673                          RXCHK_BRCM_TAG_MATCH_SHIFT);
2674                 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2675                         reg |= BIT(RXCHK_BRCM_TAG_MATCH_SHIFT + i);
2676                         i++;
2677                 }
2678                 reg |= RXCHK_EN | RXCHK_BRCM_TAG_EN;
2679                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2680         }
2681
2682         /* Make sure RBUF entered WoL mode as result */
2683         do {
2684                 reg = rbuf_readl(priv, RBUF_STATUS);
2685                 if (reg & RBUF_WOL_MODE)
2686                         break;
2687
2688                 udelay(10);
2689         } while (timeout-- > 0);
2690
2691         /* Do not leave the UniMAC RBUF matching only MPD packets */
2692         if (!timeout) {
2693                 mpd_enable_set(priv, false);
2694                 netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
2695                 return -ETIMEDOUT;
2696         }
2697
2698         /* UniMAC receive needs to be turned on */
2699         umac_enable_set(priv, CMD_RX_EN, 1);
2700
2701         netif_dbg(priv, wol, ndev, "entered WOL mode\n");
2702
2703         return 0;
2704 }
2705
2706 static int __maybe_unused bcm_sysport_suspend(struct device *d)
2707 {
2708         struct net_device *dev = dev_get_drvdata(d);
2709         struct bcm_sysport_priv *priv = netdev_priv(dev);
2710         unsigned int i;
2711         int ret = 0;
2712         u32 reg;
2713
2714         if (!netif_running(dev))
2715                 return 0;
2716
2717         netif_device_detach(dev);
2718
2719         bcm_sysport_netif_stop(dev);
2720
2721         phy_suspend(dev->phydev);
2722
2723         /* Disable UniMAC RX */
2724         umac_enable_set(priv, CMD_RX_EN, 0);
2725
2726         ret = rdma_enable_set(priv, 0);
2727         if (ret) {
2728                 netdev_err(dev, "RDMA timeout!\n");
2729                 return ret;
2730         }
2731
2732         /* Disable RXCHK if enabled */
2733         if (priv->rx_chk_en) {
2734                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2735                 reg &= ~RXCHK_EN;
2736                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2737         }
2738
2739         /* Flush RX pipe */
2740         if (!priv->wolopts)
2741                 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
2742
2743         ret = tdma_enable_set(priv, 0);
2744         if (ret) {
2745                 netdev_err(dev, "TDMA timeout!\n");
2746                 return ret;
2747         }
2748
2749         /* Wait for a packet boundary */
2750         usleep_range(2000, 3000);
2751
2752         umac_enable_set(priv, CMD_TX_EN, 0);
2753
2754         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
2755
2756         /* Free RX/TX rings SW structures */
2757         for (i = 0; i < dev->num_tx_queues; i++)
2758                 bcm_sysport_fini_tx_ring(priv, i);
2759         bcm_sysport_fini_rx_ring(priv);
2760
2761         /* Get prepared for Wake-on-LAN */
2762         if (device_may_wakeup(d) && priv->wolopts)
2763                 ret = bcm_sysport_suspend_to_wol(priv);
2764
2765         return ret;
2766 }
2767
2768 static int __maybe_unused bcm_sysport_resume(struct device *d)
2769 {
2770         struct net_device *dev = dev_get_drvdata(d);
2771         struct bcm_sysport_priv *priv = netdev_priv(dev);
2772         unsigned int i;
2773         int ret;
2774
2775         if (!netif_running(dev))
2776                 return 0;
2777
2778         umac_reset(priv);
2779
2780         /* We may have been suspended and never received a WOL event that
2781          * would turn off MPD detection, take care of that now
2782          */
2783         bcm_sysport_resume_from_wol(priv);
2784
2785         /* Initialize both hardware and software ring */
2786         for (i = 0; i < dev->num_tx_queues; i++) {
2787                 ret = bcm_sysport_init_tx_ring(priv, i);
2788                 if (ret) {
2789                         netdev_err(dev, "failed to initialize TX ring %d\n",
2790                                    i);
2791                         goto out_free_tx_rings;
2792                 }
2793         }
2794
2795         /* Initialize linked-list */
2796         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2797
2798         /* Initialize RX ring */
2799         ret = bcm_sysport_init_rx_ring(priv);
2800         if (ret) {
2801                 netdev_err(dev, "failed to initialize RX ring\n");
2802                 goto out_free_rx_ring;
2803         }
2804
2805         /* RX pipe enable */
2806         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2807
2808         ret = rdma_enable_set(priv, 1);
2809         if (ret) {
2810                 netdev_err(dev, "failed to enable RDMA\n");
2811                 goto out_free_rx_ring;
2812         }
2813
2814         /* Restore enabled features */
2815         bcm_sysport_set_features(dev, dev->features);
2816
2817         rbuf_init(priv);
2818
2819         /* Set maximum frame length */
2820         if (!priv->is_lite)
2821                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2822         else
2823                 gib_set_pad_extension(priv);
2824
2825         /* Set MAC address */
2826         umac_set_hw_addr(priv, dev->dev_addr);
2827
2828         umac_enable_set(priv, CMD_RX_EN, 1);
2829
2830         /* TX pipe enable */
2831         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2832
2833         umac_enable_set(priv, CMD_TX_EN, 1);
2834
2835         ret = tdma_enable_set(priv, 1);
2836         if (ret) {
2837                 netdev_err(dev, "TDMA timeout!\n");
2838                 goto out_free_rx_ring;
2839         }
2840
2841         phy_resume(dev->phydev);
2842
2843         bcm_sysport_netif_start(dev);
2844
2845         netif_device_attach(dev);
2846
2847         return 0;
2848
2849 out_free_rx_ring:
2850         bcm_sysport_fini_rx_ring(priv);
2851 out_free_tx_rings:
2852         for (i = 0; i < dev->num_tx_queues; i++)
2853                 bcm_sysport_fini_tx_ring(priv, i);
2854         return ret;
2855 }
2856
2857 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2858                 bcm_sysport_suspend, bcm_sysport_resume);
2859
2860 static struct platform_driver bcm_sysport_driver = {
2861         .probe  = bcm_sysport_probe,
2862         .remove = bcm_sysport_remove,
2863         .driver =  {
2864                 .name = "brcm-systemport",
2865                 .of_match_table = bcm_sysport_of_match,
2866                 .pm = &bcm_sysport_pm_ops,
2867         },
2868 };
2869 module_platform_driver(bcm_sysport_driver);
2870
2871 MODULE_AUTHOR("Broadcom Corporation");
2872 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2873 MODULE_ALIAS("platform:brcm-systemport");
2874 MODULE_LICENSE("GPL");