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         /* Clear L2 header checks, which would prevent BPDUs
 138          * from being received.
 139          */
 140         reg &= ~RXCHK_L2_HDR_DIS;
 141         if (priv->rx_chk_en)
 142                 reg |= RXCHK_EN;
 143         else
 144                 reg &= ~RXCHK_EN;
 145
 146         /* If UniMAC forwards CRC, we need to skip over it to get
 147          * a valid CHK bit to be set in the per-packet status word
 148          */
 149         if (priv->rx_chk_en && priv->crc_fwd)
 150                 reg |= RXCHK_SKIP_FCS;
 151         else
 152                 reg &= ~RXCHK_SKIP_FCS;
 153
 154         /* If Broadcom tags are enabled (e.g: using a switch), make
 155          * sure we tell the RXCHK hardware to expect a 4-bytes Broadcom
 156          * tag after the Ethernet MAC Source Address.
 157          */
 158         if (netdev_uses_dsa(dev))
 159                 reg |= RXCHK_BRCM_TAG_EN;
 160         else
 161                 reg &= ~RXCHK_BRCM_TAG_EN;
 162
 163         rxchk_writel(priv, reg, RXCHK_CONTROL);
 164 }
 165
 166 static void bcm_sysport_set_tx_csum(struct net_device *dev,
 167                                     netdev_features_t wanted)
 168 {
 169         struct bcm_sysport_priv *priv = netdev_priv(dev);
 170         u32 reg;
 171
 172         /* Hardware transmit checksum requires us to enable the Transmit status
 173          * block prepended to the packet contents
 174          */
 175         priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM));
 176         reg = tdma_readl(priv, TDMA_CONTROL);
 177         if (priv->tsb_en)
 178                 reg |= tdma_control_bit(priv, TSB_EN);
 179         else
 180                 reg &= ~tdma_control_bit(priv, TSB_EN);
 181         tdma_writel(priv, reg, TDMA_CONTROL);
 182 }
 183
 184 static int bcm_sysport_set_features(struct net_device *dev,
 185                                     netdev_features_t features)
 186 {
 187         struct bcm_sysport_priv *priv = netdev_priv(dev);
 188
 189         /* Read CRC forward */
 190         if (!priv->is_lite)
 191                 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
 192         else
 193                 priv->crc_fwd = !((gib_readl(priv, GIB_CONTROL) &
 194                                   GIB_FCS_STRIP) >> GIB_FCS_STRIP_SHIFT);
 195
 196         bcm_sysport_set_rx_csum(dev, features);
 197         bcm_sysport_set_tx_csum(dev, features);
 198
 199         return 0;
 200 }
 201
 202 /* Hardware counters must be kept in sync because the order/offset
 203  * is important here (order in structure declaration = order in hardware)
 204  */
 205 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = {
 206         /* general stats */
 207         STAT_NETDEV64(rx_packets),
 208         STAT_NETDEV64(tx_packets),
 209         STAT_NETDEV64(rx_bytes),
 210         STAT_NETDEV64(tx_bytes),
 211         STAT_NETDEV(rx_errors),
 212         STAT_NETDEV(tx_errors),
 213         STAT_NETDEV(rx_dropped),
 214         STAT_NETDEV(tx_dropped),
 215         STAT_NETDEV(multicast),
 216         /* UniMAC RSV counters */
 217         STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
 218         STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
 219         STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
 220         STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
 221         STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
 222         STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
 223         STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
 224         STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
 225         STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
 226         STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
 227         STAT_MIB_RX("rx_pkts", mib.rx.pkt),
 228         STAT_MIB_RX("rx_bytes", mib.rx.bytes),
 229         STAT_MIB_RX("rx_multicast", mib.rx.mca),
 230         STAT_MIB_RX("rx_broadcast", mib.rx.bca),
 231         STAT_MIB_RX("rx_fcs", mib.rx.fcs),
 232         STAT_MIB_RX("rx_control", mib.rx.cf),
 233         STAT_MIB_RX("rx_pause", mib.rx.pf),
 234         STAT_MIB_RX("rx_unknown", mib.rx.uo),
 235         STAT_MIB_RX("rx_align", mib.rx.aln),
 236         STAT_MIB_RX("rx_outrange", mib.rx.flr),
 237         STAT_MIB_RX("rx_code", mib.rx.cde),
 238         STAT_MIB_RX("rx_carrier", mib.rx.fcr),
 239         STAT_MIB_RX("rx_oversize", mib.rx.ovr),
 240         STAT_MIB_RX("rx_jabber", mib.rx.jbr),
 241         STAT_MIB_RX("rx_mtu_err", mib.rx.mtue),
 242         STAT_MIB_RX("rx_good_pkts", mib.rx.pok),
 243         STAT_MIB_RX("rx_unicast", mib.rx.uc),
 244         STAT_MIB_RX("rx_ppp", mib.rx.ppp),
 245         STAT_MIB_RX("rx_crc", mib.rx.rcrc),
 246         /* UniMAC TSV counters */
 247         STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
 248         STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
 249         STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
 250         STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
 251         STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
 252         STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
 253         STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
 254         STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
 255         STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
 256         STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
 257         STAT_MIB_TX("tx_pkts", mib.tx.pkts),
 258         STAT_MIB_TX("tx_multicast", mib.tx.mca),
 259         STAT_MIB_TX("tx_broadcast", mib.tx.bca),
 260         STAT_MIB_TX("tx_pause", mib.tx.pf),
 261         STAT_MIB_TX("tx_control", mib.tx.cf),
 262         STAT_MIB_TX("tx_fcs_err", mib.tx.fcs),
 263         STAT_MIB_TX("tx_oversize", mib.tx.ovr),
 264         STAT_MIB_TX("tx_defer", mib.tx.drf),
 265         STAT_MIB_TX("tx_excess_defer", mib.tx.edf),
 266         STAT_MIB_TX("tx_single_col", mib.tx.scl),
 267         STAT_MIB_TX("tx_multi_col", mib.tx.mcl),
 268         STAT_MIB_TX("tx_late_col", mib.tx.lcl),
 269         STAT_MIB_TX("tx_excess_col", mib.tx.ecl),
 270         STAT_MIB_TX("tx_frags", mib.tx.frg),
 271         STAT_MIB_TX("tx_total_col", mib.tx.ncl),
 272         STAT_MIB_TX("tx_jabber", mib.tx.jbr),
 273         STAT_MIB_TX("tx_bytes", mib.tx.bytes),
 274         STAT_MIB_TX("tx_good_pkts", mib.tx.pok),
 275         STAT_MIB_TX("tx_unicast", mib.tx.uc),
 276         /* UniMAC RUNT counters */
 277         STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
 278         STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
 279         STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
 280         STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
 281         /* RXCHK misc statistics */
 282         STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR),
 283         STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc,
 284                    RXCHK_OTHER_DISC_CNTR),
 285         /* RBUF misc statistics */
 286         STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR),
 287         STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR),
 288         STAT_MIB_SOFT("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
 289         STAT_MIB_SOFT("rx_dma_failed", mib.rx_dma_failed),
 290         STAT_MIB_SOFT("tx_dma_failed", mib.tx_dma_failed),
 291         STAT_MIB_SOFT("tx_realloc_tsb", mib.tx_realloc_tsb),
 292         STAT_MIB_SOFT("tx_realloc_tsb_failed", mib.tx_realloc_tsb_failed),
 293         /* Per TX-queue statistics are dynamically appended */
 294 };
 295
 296 #define BCM_SYSPORT_STATS_LEN   ARRAY_SIZE(bcm_sysport_gstrings_stats)
 297
 298 static void bcm_sysport_get_drvinfo(struct net_device *dev,
 299                                     struct ethtool_drvinfo *info)
 300 {
 301         strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
 302         strlcpy(info->version, "0.1", sizeof(info->version));
 303         strlcpy(info->bus_info, "platform", sizeof(info->bus_info));
 304 }
 305
 306 static u32 bcm_sysport_get_msglvl(struct net_device *dev)
 307 {
 308         struct bcm_sysport_priv *priv = netdev_priv(dev);
 309
 310         return priv->msg_enable;
 311 }
 312
 313 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
 314 {
 315         struct bcm_sysport_priv *priv = netdev_priv(dev);
 316
 317         priv->msg_enable = enable;
 318 }
 319
 320 static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type)
 321 {
 322         switch (type) {
 323         case BCM_SYSPORT_STAT_NETDEV:
 324         case BCM_SYSPORT_STAT_NETDEV64:
 325         case BCM_SYSPORT_STAT_RXCHK:
 326         case BCM_SYSPORT_STAT_RBUF:
 327         case BCM_SYSPORT_STAT_SOFT:
 328                 return true;
 329         default:
 330                 return false;
 331         }
 332 }
 333
 334 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set)
 335 {
 336         struct bcm_sysport_priv *priv = netdev_priv(dev);
 337         const struct bcm_sysport_stats *s;
 338         unsigned int i, j;
 339
 340         switch (string_set) {
 341         case ETH_SS_STATS:
 342                 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 343                         s = &bcm_sysport_gstrings_stats[i];
 344                         if (priv->is_lite &&
 345                             !bcm_sysport_lite_stat_valid(s->type))
 346                                 continue;
 347                         j++;
 348                 }
 349                 /* Include per-queue statistics */
 350                 return j + dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
 351         default:
 352                 return -EOPNOTSUPP;
 353         }
 354 }
 355
 356 static void bcm_sysport_get_strings(struct net_device *dev,
 357                                     u32 stringset, u8 *data)
 358 {
 359         struct bcm_sysport_priv *priv = netdev_priv(dev);
 360         const struct bcm_sysport_stats *s;
 361         char buf[128];
 362         int i, j;
 363
 364         switch (stringset) {
 365         case ETH_SS_STATS:
 366                 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 367                         s = &bcm_sysport_gstrings_stats[i];
 368                         if (priv->is_lite &&
 369                             !bcm_sysport_lite_stat_valid(s->type))
 370                                 continue;
 371
 372                         memcpy(data + j * ETH_GSTRING_LEN, s->stat_string,
 373                                ETH_GSTRING_LEN);
 374                         j++;
 375                 }
 376
 377                 for (i = 0; i < dev->num_tx_queues; i++) {
 378                         snprintf(buf, sizeof(buf), "txq%d_packets", i);
 379                         memcpy(data + j * ETH_GSTRING_LEN, buf,
 380                                ETH_GSTRING_LEN);
 381                         j++;
 382
 383                         snprintf(buf, sizeof(buf), "txq%d_bytes", i);
 384                         memcpy(data + j * ETH_GSTRING_LEN, buf,
 385                                ETH_GSTRING_LEN);
 386                         j++;
 387                 }
 388                 break;
 389         default:
 390                 break;
 391         }
 392 }
 393
 394 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
 395 {
 396         int i, j = 0;
 397
 398         for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 399                 const struct bcm_sysport_stats *s;
 400                 u8 offset = 0;
 401                 u32 val = 0;
 402                 char *p;
 403
 404                 s = &bcm_sysport_gstrings_stats[i];
 405                 switch (s->type) {
 406                 case BCM_SYSPORT_STAT_NETDEV:
 407                 case BCM_SYSPORT_STAT_NETDEV64:
 408                 case BCM_SYSPORT_STAT_SOFT:
 409                         continue;
 410                 case BCM_SYSPORT_STAT_MIB_RX:
 411                 case BCM_SYSPORT_STAT_MIB_TX:
 412                 case BCM_SYSPORT_STAT_RUNT:
 413                         if (priv->is_lite)
 414                                 continue;
 415
 416                         if (s->type != BCM_SYSPORT_STAT_MIB_RX)
 417                                 offset = UMAC_MIB_STAT_OFFSET;
 418                         val = umac_readl(priv, UMAC_MIB_START + j + offset);
 419                         break;
 420                 case BCM_SYSPORT_STAT_RXCHK:
 421                         val = rxchk_readl(priv, s->reg_offset);
 422                         if (val == ~0)
 423                                 rxchk_writel(priv, 0, s->reg_offset);
 424                         break;
 425                 case BCM_SYSPORT_STAT_RBUF:
 426                         val = rbuf_readl(priv, s->reg_offset);
 427                         if (val == ~0)
 428                                 rbuf_writel(priv, 0, s->reg_offset);
 429                         break;
 430                 }
 431
 432                 j += s->stat_sizeof;
 433                 p = (char *)priv + s->stat_offset;
 434                 *(u32 *)p = val;
 435         }
 436
 437         netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
 438 }
 439
 440 static void bcm_sysport_update_tx_stats(struct bcm_sysport_priv *priv,
 441                                         u64 *tx_bytes, u64 *tx_packets)
 442 {
 443         struct bcm_sysport_tx_ring *ring;
 444         u64 bytes = 0, packets = 0;
 445         unsigned int start;
 446         unsigned int q;
 447
 448         for (q = 0; q < priv->netdev->num_tx_queues; q++) {
 449                 ring = &priv->tx_rings[q];
 450                 do {
 451                         start = u64_stats_fetch_begin_irq(&priv->syncp);
 452                         bytes = ring->bytes;
 453                         packets = ring->packets;
 454                 } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
 455
 456                 *tx_bytes += bytes;
 457                 *tx_packets += packets;
 458         }
 459 }
 460
 461 static void bcm_sysport_get_stats(struct net_device *dev,
 462                                   struct ethtool_stats *stats, u64 *data)
 463 {
 464         struct bcm_sysport_priv *priv = netdev_priv(dev);
 465         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
 466         struct u64_stats_sync *syncp = &priv->syncp;
 467         struct bcm_sysport_tx_ring *ring;
 468         u64 tx_bytes = 0, tx_packets = 0;
 469         unsigned int start;
 470         int i, j;
 471
 472         if (netif_running(dev)) {
 473                 bcm_sysport_update_mib_counters(priv);
 474                 bcm_sysport_update_tx_stats(priv, &tx_bytes, &tx_packets);
 475                 stats64->tx_bytes = tx_bytes;
 476                 stats64->tx_packets = tx_packets;
 477         }
 478
 479         for (i =  0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 480                 const struct bcm_sysport_stats *s;
 481                 char *p;
 482
 483                 s = &bcm_sysport_gstrings_stats[i];
 484                 if (s->type == BCM_SYSPORT_STAT_NETDEV)
 485                         p = (char *)&dev->stats;
 486                 else if (s->type == BCM_SYSPORT_STAT_NETDEV64)
 487                         p = (char *)stats64;
 488                 else
 489                         p = (char *)priv;
 490
 491                 if (priv->is_lite && !bcm_sysport_lite_stat_valid(s->type))
 492                         continue;
 493                 p += s->stat_offset;
 494
 495                 if (s->stat_sizeof == sizeof(u64) &&
 496                     s->type == BCM_SYSPORT_STAT_NETDEV64) {
 497                         do {
 498                                 start = u64_stats_fetch_begin_irq(syncp);
 499                                 data[i] = *(u64 *)p;
 500                         } while (u64_stats_fetch_retry_irq(syncp, start));
 501                 } else
 502                         data[i] = *(u32 *)p;
 503                 j++;
 504         }
 505
 506         /* For SYSTEMPORT Lite since we have holes in our statistics, j would
 507          * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it
 508          * needs to point to how many total statistics we have minus the
 509          * number of per TX queue statistics
 510          */
 511         j = bcm_sysport_get_sset_count(dev, ETH_SS_STATS) -
 512             dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
 513
 514         for (i = 0; i < dev->num_tx_queues; i++) {
 515                 ring = &priv->tx_rings[i];
 516                 data[j] = ring->packets;
 517                 j++;
 518                 data[j] = ring->bytes;
 519                 j++;
 520         }
 521 }
 522
 523 static void bcm_sysport_get_wol(struct net_device *dev,
 524                                 struct ethtool_wolinfo *wol)
 525 {
 526         struct bcm_sysport_priv *priv = netdev_priv(dev);
 527
 528         wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
 529         wol->wolopts = priv->wolopts;
 530
 531         if (!(priv->wolopts & WAKE_MAGICSECURE))
 532                 return;
 533
 534         memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass));
 535 }
 536
 537 static int bcm_sysport_set_wol(struct net_device *dev,
 538                                struct ethtool_wolinfo *wol)
 539 {
 540         struct bcm_sysport_priv *priv = netdev_priv(dev);
 541         struct device *kdev = &priv->pdev->dev;
 542         u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
 543
 544         if (!device_can_wakeup(kdev))
 545                 return -ENOTSUPP;
 546
 547         if (wol->wolopts & ~supported)
 548                 return -EINVAL;
 549
 550         if (wol->wolopts & WAKE_MAGICSECURE)
 551                 memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass));
 552
 553         /* Flag the device and relevant IRQ as wakeup capable */
 554         if (wol->wolopts) {
 555                 device_set_wakeup_enable(kdev, 1);
 556                 if (priv->wol_irq_disabled)
 557                         enable_irq_wake(priv->wol_irq);
 558                 priv->wol_irq_disabled = 0;
 559         } else {
 560                 device_set_wakeup_enable(kdev, 0);
 561                 /* Avoid unbalanced disable_irq_wake calls */
 562                 if (!priv->wol_irq_disabled)
 563                         disable_irq_wake(priv->wol_irq);
 564                 priv->wol_irq_disabled = 1;
 565         }
 566
 567         priv->wolopts = wol->wolopts;
 568
 569         return 0;
 570 }
 571
 572 static void bcm_sysport_set_rx_coalesce(struct bcm_sysport_priv *priv,
 573                                         u32 usecs, u32 pkts)
 574 {
 575         u32 reg;
 576
 577         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 578         reg &= ~(RDMA_INTR_THRESH_MASK |
 579                  RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT);
 580         reg |= pkts;
 581         reg |= DIV_ROUND_UP(usecs * 1000, 8192) << RDMA_TIMEOUT_SHIFT;
 582         rdma_writel(priv, reg, RDMA_MBDONE_INTR);
 583 }
 584
 585 static void bcm_sysport_set_tx_coalesce(struct bcm_sysport_tx_ring *ring,
 586                                         struct ethtool_coalesce *ec)
 587 {
 588         struct bcm_sysport_priv *priv = ring->priv;
 589         u32 reg;
 590
 591         reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(ring->index));
 592         reg &= ~(RING_INTR_THRESH_MASK |
 593                  RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT);
 594         reg |= ec->tx_max_coalesced_frames;
 595         reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) <<
 596                             RING_TIMEOUT_SHIFT;
 597         tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(ring->index));
 598 }
 599
 600 static int bcm_sysport_get_coalesce(struct net_device *dev,
 601                                     struct ethtool_coalesce *ec)
 602 {
 603         struct bcm_sysport_priv *priv = netdev_priv(dev);
 604         u32 reg;
 605
 606         reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0));
 607
 608         ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000;
 609         ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK;
 610
 611         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 612
 613         ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000;
 614         ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK;
 615         ec->use_adaptive_rx_coalesce = priv->dim.use_dim;
 616
 617         return 0;
 618 }
 619
 620 static int bcm_sysport_set_coalesce(struct net_device *dev,
 621                                     struct ethtool_coalesce *ec)
 622 {
 623         struct bcm_sysport_priv *priv = netdev_priv(dev);
 624         struct net_dim_cq_moder moder;
 625         u32 usecs, pkts;
 626         unsigned int i;
 627
 628         /* Base system clock is 125Mhz, DMA timeout is this reference clock
 629          * divided by 1024, which yield roughly 8.192 us, our maximum value has
 630          * to fit in the RING_TIMEOUT_MASK (16 bits).
 631          */
 632         if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
 633             ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
 634             ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
 635             ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
 636                 return -EINVAL;
 637
 638         if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
 639             (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0) ||
 640             ec->use_adaptive_tx_coalesce)
 641                 return -EINVAL;
 642
 643         for (i = 0; i < dev->num_tx_queues; i++)
 644                 bcm_sysport_set_tx_coalesce(&priv->tx_rings[i], ec);
 645
 646         priv->rx_coalesce_usecs = ec->rx_coalesce_usecs;
 647         priv->rx_max_coalesced_frames = ec->rx_max_coalesced_frames;
 648         usecs = priv->rx_coalesce_usecs;
 649         pkts = priv->rx_max_coalesced_frames;
 650
 651         if (ec->use_adaptive_rx_coalesce && !priv->dim.use_dim) {
 652                 moder = net_dim_get_def_rx_moderation(priv->dim.dim.mode);
 653                 usecs = moder.usec;
 654                 pkts = moder.pkts;
 655         }
 656
 657         priv->dim.use_dim = ec->use_adaptive_rx_coalesce;
 658
 659         /* Apply desired coalescing parameters */
 660         bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
 661
 662         return 0;
 663 }
 664
 665 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
 666 {
 667         dev_consume_skb_any(cb->skb);
 668         cb->skb = NULL;
 669         dma_unmap_addr_set(cb, dma_addr, 0);
 670 }
 671
 672 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
 673                                              struct bcm_sysport_cb *cb)
 674 {
 675         struct device *kdev = &priv->pdev->dev;
 676         struct net_device *ndev = priv->netdev;
 677         struct sk_buff *skb, *rx_skb;
 678         dma_addr_t mapping;
 679
 680         /* Allocate a new SKB for a new packet */
 681         skb = netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH);
 682         if (!skb) {
 683                 priv->mib.alloc_rx_buff_failed++;
 684                 netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
 685                 return NULL;
 686         }
 687
 688         mapping = dma_map_single(kdev, skb->data,
 689                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 690         if (dma_mapping_error(kdev, mapping)) {
 691                 priv->mib.rx_dma_failed++;
 692                 dev_kfree_skb_any(skb);
 693                 netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
 694                 return NULL;
 695         }
 696
 697         /* Grab the current SKB on the ring */
 698         rx_skb = cb->skb;
 699         if (likely(rx_skb))
 700                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 701                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 702
 703         /* Put the new SKB on the ring */
 704         cb->skb = skb;
 705         dma_unmap_addr_set(cb, dma_addr, mapping);
 706         dma_desc_set_addr(priv, cb->bd_addr, mapping);
 707
 708         netif_dbg(priv, rx_status, ndev, "RX refill\n");
 709
 710         /* Return the current SKB to the caller */
 711         return rx_skb;
 712 }
 713
 714 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
 715 {
 716         struct bcm_sysport_cb *cb;
 717         struct sk_buff *skb;
 718         unsigned int i;
 719
 720         for (i = 0; i < priv->num_rx_bds; i++) {
 721                 cb = &priv->rx_cbs[i];
 722                 skb = bcm_sysport_rx_refill(priv, cb);
 723                 if (skb)
 724                         dev_kfree_skb(skb);
 725                 if (!cb->skb)
 726                         return -ENOMEM;
 727         }
 728
 729         return 0;
 730 }
 731
 732 /* Poll the hardware for up to budget packets to process */
 733 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
 734                                         unsigned int budget)
 735 {
 736         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
 737         struct net_device *ndev = priv->netdev;
 738         unsigned int processed = 0, to_process;
 739         unsigned int processed_bytes = 0;
 740         struct bcm_sysport_cb *cb;
 741         struct sk_buff *skb;
 742         unsigned int p_index;
 743         u16 len, status;
 744         struct bcm_rsb *rsb;
 745
 746         /* Clear status before servicing to reduce spurious interrupts */
 747         intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR);
 748
 749         /* Determine how much we should process since last call, SYSTEMPORT Lite
 750          * groups the producer and consumer indexes into the same 32-bit
 751          * which we access using RDMA_CONS_INDEX
 752          */
 753         if (!priv->is_lite)
 754                 p_index = rdma_readl(priv, RDMA_PROD_INDEX);
 755         else
 756                 p_index = rdma_readl(priv, RDMA_CONS_INDEX);
 757         p_index &= RDMA_PROD_INDEX_MASK;
 758
 759         to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK;
 760
 761         netif_dbg(priv, rx_status, ndev,
 762                   "p_index=%d rx_c_index=%d to_process=%d\n",
 763                   p_index, priv->rx_c_index, to_process);
 764
 765         while ((processed < to_process) && (processed < budget)) {
 766                 cb = &priv->rx_cbs[priv->rx_read_ptr];
 767                 skb = bcm_sysport_rx_refill(priv, cb);
 768
 769
 770                 /* We do not have a backing SKB, so we do not a corresponding
 771                  * DMA mapping for this incoming packet since
 772                  * bcm_sysport_rx_refill always either has both skb and mapping
 773                  * or none.
 774                  */
 775                 if (unlikely(!skb)) {
 776                         netif_err(priv, rx_err, ndev, "out of memory!\n");
 777                         ndev->stats.rx_dropped++;
 778                         ndev->stats.rx_errors++;
 779                         goto next;
 780                 }
 781
 782                 /* Extract the Receive Status Block prepended */
 783                 rsb = (struct bcm_rsb *)skb->data;
 784                 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
 785                 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
 786                           DESC_STATUS_MASK;
 787
 788                 netif_dbg(priv, rx_status, ndev,
 789                           "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
 790                           p_index, priv->rx_c_index, priv->rx_read_ptr,
 791                           len, status);
 792
 793                 if (unlikely(len > RX_BUF_LENGTH)) {
 794                         netif_err(priv, rx_status, ndev, "oversized packet\n");
 795                         ndev->stats.rx_length_errors++;
 796                         ndev->stats.rx_errors++;
 797                         dev_kfree_skb_any(skb);
 798                         goto next;
 799                 }
 800
 801                 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
 802                         netif_err(priv, rx_status, ndev, "fragmented packet!\n");
 803                         ndev->stats.rx_dropped++;
 804                         ndev->stats.rx_errors++;
 805                         dev_kfree_skb_any(skb);
 806                         goto next;
 807                 }
 808
 809                 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
 810                         netif_err(priv, rx_err, ndev, "error packet\n");
 811                         if (status & RX_STATUS_OVFLOW)
 812                                 ndev->stats.rx_over_errors++;
 813                         ndev->stats.rx_dropped++;
 814                         ndev->stats.rx_errors++;
 815                         dev_kfree_skb_any(skb);
 816                         goto next;
 817                 }
 818
 819                 skb_put(skb, len);
 820
 821                 /* Hardware validated our checksum */
 822                 if (likely(status & DESC_L4_CSUM))
 823                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 824
 825                 /* Hardware pre-pends packets with 2bytes before Ethernet
 826                  * header plus we have the Receive Status Block, strip off all
 827                  * of this from the SKB.
 828                  */
 829                 skb_pull(skb, sizeof(*rsb) + 2);
 830                 len -= (sizeof(*rsb) + 2);
 831                 processed_bytes += len;
 832
 833                 /* UniMAC may forward CRC */
 834                 if (priv->crc_fwd) {
 835                         skb_trim(skb, len - ETH_FCS_LEN);
 836                         len -= ETH_FCS_LEN;
 837                 }
 838
 839                 skb->protocol = eth_type_trans(skb, ndev);
 840                 ndev->stats.rx_packets++;
 841                 ndev->stats.rx_bytes += len;
 842                 u64_stats_update_begin(&priv->syncp);
 843                 stats64->rx_packets++;
 844                 stats64->rx_bytes += len;
 845                 u64_stats_update_end(&priv->syncp);
 846
 847                 napi_gro_receive(&priv->napi, skb);
 848 next:
 849                 processed++;
 850                 priv->rx_read_ptr++;
 851
 852                 if (priv->rx_read_ptr == priv->num_rx_bds)
 853                         priv->rx_read_ptr = 0;
 854         }
 855
 856         priv->dim.packets = processed;
 857         priv->dim.bytes = processed_bytes;
 858
 859         return processed;
 860 }
 861
 862 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring,
 863                                        struct bcm_sysport_cb *cb,
 864                                        unsigned int *bytes_compl,
 865                                        unsigned int *pkts_compl)
 866 {
 867         struct bcm_sysport_priv *priv = ring->priv;
 868         struct device *kdev = &priv->pdev->dev;
 869
 870         if (cb->skb) {
 871                 *bytes_compl += cb->skb->len;
 872                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 873                                  dma_unmap_len(cb, dma_len),
 874                                  DMA_TO_DEVICE);
 875                 (*pkts_compl)++;
 876                 bcm_sysport_free_cb(cb);
 877         /* SKB fragment */
 878         } else if (dma_unmap_addr(cb, dma_addr)) {
 879                 *bytes_compl += dma_unmap_len(cb, dma_len);
 880                 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
 881                                dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
 882                 dma_unmap_addr_set(cb, dma_addr, 0);
 883         }
 884 }
 885
 886 /* Reclaim queued SKBs for transmission completion, lockless version */
 887 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 888                                              struct bcm_sysport_tx_ring *ring)
 889 {
 890         unsigned int pkts_compl = 0, bytes_compl = 0;
 891         struct net_device *ndev = priv->netdev;
 892         unsigned int txbds_processed = 0;
 893         struct bcm_sysport_cb *cb;
 894         unsigned int txbds_ready;
 895         unsigned int c_index;
 896         u32 hw_ind;
 897
 898         /* Clear status before servicing to reduce spurious interrupts */
 899         if (!ring->priv->is_lite)
 900                 intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR);
 901         else
 902                 intrl2_0_writel(ring->priv, BIT(ring->index +
 903                                 INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR);
 904
 905         /* Compute how many descriptors have been processed since last call */
 906         hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
 907         c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
 908         txbds_ready = (c_index - ring->c_index) & RING_CONS_INDEX_MASK;
 909
 910         netif_dbg(priv, tx_done, ndev,
 911                   "ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
 912                   ring->index, ring->c_index, c_index, txbds_ready);
 913
 914         while (txbds_processed < txbds_ready) {
 915                 cb = &ring->cbs[ring->clean_index];
 916                 bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl);
 917
 918                 ring->desc_count++;
 919                 txbds_processed++;
 920
 921                 if (likely(ring->clean_index < ring->size - 1))
 922                         ring->clean_index++;
 923                 else
 924                         ring->clean_index = 0;
 925         }
 926
 927         u64_stats_update_begin(&priv->syncp);
 928         ring->packets += pkts_compl;
 929         ring->bytes += bytes_compl;
 930         u64_stats_update_end(&priv->syncp);
 931
 932         ring->c_index = c_index;
 933
 934         netif_dbg(priv, tx_done, ndev,
 935                   "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
 936                   ring->index, ring->c_index, pkts_compl, bytes_compl);
 937
 938         return pkts_compl;
 939 }
 940
 941 /* Locked version of the per-ring TX reclaim routine */
 942 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 943                                            struct bcm_sysport_tx_ring *ring)
 944 {
 945         struct netdev_queue *txq;
 946         unsigned int released;
 947         unsigned long flags;
 948
 949         txq = netdev_get_tx_queue(priv->netdev, ring->index);
 950
 951         spin_lock_irqsave(&ring->lock, flags);
 952         released = __bcm_sysport_tx_reclaim(priv, ring);
 953         if (released)
 954                 netif_tx_wake_queue(txq);
 955
 956         spin_unlock_irqrestore(&ring->lock, flags);
 957
 958         return released;
 959 }
 960
 961 /* Locked version of the per-ring TX reclaim, but does not wake the queue */
 962 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv,
 963                                  struct bcm_sysport_tx_ring *ring)
 964 {
 965         unsigned long flags;
 966
 967         spin_lock_irqsave(&ring->lock, flags);
 968         __bcm_sysport_tx_reclaim(priv, ring);
 969         spin_unlock_irqrestore(&ring->lock, flags);
 970 }
 971
 972 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
 973 {
 974         struct bcm_sysport_tx_ring *ring =
 975                 container_of(napi, struct bcm_sysport_tx_ring, napi);
 976         unsigned int work_done = 0;
 977
 978         work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
 979
 980         if (work_done == 0) {
 981                 napi_complete(napi);
 982                 /* re-enable TX interrupt */
 983                 if (!ring->priv->is_lite)
 984                         intrl2_1_mask_clear(ring->priv, BIT(ring->index));
 985                 else
 986                         intrl2_0_mask_clear(ring->priv, BIT(ring->index +
 987                                             INTRL2_0_TDMA_MBDONE_SHIFT));
 988
 989                 return 0;
 990         }
 991
 992         return budget;
 993 }
 994
 995 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
 996 {
 997         unsigned int q;
 998
 999         for (q = 0; q < priv->netdev->num_tx_queues; q++)
1000                 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
1001 }
1002
1003 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
1004 {
1005         struct bcm_sysport_priv *priv =
1006                 container_of(napi, struct bcm_sysport_priv, napi);
1007         struct net_dim_sample dim_sample;
1008         unsigned int work_done = 0;
1009
1010         work_done = bcm_sysport_desc_rx(priv, budget);
1011
1012         priv->rx_c_index += work_done;
1013         priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
1014
1015         /* SYSTEMPORT Lite groups the producer/consumer index, producer is
1016          * maintained by HW, but writes to it will be ignore while RDMA
1017          * is active
1018          */
1019         if (!priv->is_lite)
1020                 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
1021         else
1022                 rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX);
1023
1024         if (work_done < budget) {
1025                 napi_complete_done(napi, work_done);
1026                 /* re-enable RX interrupts */
1027                 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
1028         }
1029
1030         if (priv->dim.use_dim) {
1031                 net_dim_sample(priv->dim.event_ctr, priv->dim.packets,
1032                                priv->dim.bytes, &dim_sample);
1033                 net_dim(&priv->dim.dim, dim_sample);
1034         }
1035
1036         return work_done;
1037 }
1038
1039 static void mpd_enable_set(struct bcm_sysport_priv *priv, bool enable)
1040 {
1041         u32 reg, bit;
1042
1043         reg = umac_readl(priv, UMAC_MPD_CTRL);
1044         if (enable)
1045                 reg |= MPD_EN;
1046         else
1047                 reg &= ~MPD_EN;
1048         umac_writel(priv, reg, UMAC_MPD_CTRL);
1049
1050         if (priv->is_lite)
1051                 bit = RBUF_ACPI_EN_LITE;
1052         else
1053                 bit = RBUF_ACPI_EN;
1054
1055         reg = rbuf_readl(priv, RBUF_CONTROL);
1056         if (enable)
1057                 reg |= bit;
1058         else
1059                 reg &= ~bit;
1060         rbuf_writel(priv, reg, RBUF_CONTROL);
1061 }
1062
1063 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
1064 {
1065         unsigned int index;
1066         u32 reg;
1067
1068         /* Disable RXCHK, active filters and Broadcom tag matching */
1069         reg = rxchk_readl(priv, RXCHK_CONTROL);
1070         reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
1071                  RXCHK_BRCM_TAG_MATCH_SHIFT | RXCHK_EN | RXCHK_BRCM_TAG_EN);
1072         rxchk_writel(priv, reg, RXCHK_CONTROL);
1073
1074         /* Make sure we restore correct CID index in case HW lost
1075          * its context during deep idle state
1076          */
1077         for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
1078                 rxchk_writel(priv, priv->filters_loc[index] <<
1079                              RXCHK_BRCM_TAG_CID_SHIFT, RXCHK_BRCM_TAG(index));
1080                 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
1081         }
1082
1083         /* Clear the MagicPacket detection logic */
1084         mpd_enable_set(priv, false);
1085
1086         reg = intrl2_0_readl(priv, INTRL2_CPU_STATUS);
1087         if (reg & INTRL2_0_MPD)
1088                 netdev_info(priv->netdev, "Wake-on-LAN (MPD) interrupt!\n");
1089
1090         if (reg & INTRL2_0_BRCM_MATCH_TAG) {
1091                 reg = rxchk_readl(priv, RXCHK_BRCM_TAG_MATCH_STATUS) &
1092                                   RXCHK_BRCM_TAG_MATCH_MASK;
1093                 netdev_info(priv->netdev,
1094                             "Wake-on-LAN (filters 0x%02x) interrupt!\n", reg);
1095         }
1096
1097         netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
1098 }
1099
1100 static void bcm_sysport_dim_work(struct work_struct *work)
1101 {
1102         struct net_dim *dim = container_of(work, struct net_dim, work);
1103         struct bcm_sysport_net_dim *ndim =
1104                         container_of(dim, struct bcm_sysport_net_dim, dim);
1105         struct bcm_sysport_priv *priv =
1106                         container_of(ndim, struct bcm_sysport_priv, dim);
1107         struct net_dim_cq_moder cur_profile =
1108                         net_dim_get_rx_moderation(dim->mode, dim->profile_ix);
1109
1110         bcm_sysport_set_rx_coalesce(priv, cur_profile.usec, cur_profile.pkts);
1111         dim->state = NET_DIM_START_MEASURE;
1112 }
1113
1114 /* RX and misc interrupt routine */
1115 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
1116 {
1117         struct net_device *dev = dev_id;
1118         struct bcm_sysport_priv *priv = netdev_priv(dev);
1119         struct bcm_sysport_tx_ring *txr;
1120         unsigned int ring, ring_bit;
1121
1122         priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
1123                           ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
1124         intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
1125
1126         if (unlikely(priv->irq0_stat == 0)) {
1127                 netdev_warn(priv->netdev, "spurious RX interrupt\n");
1128                 return IRQ_NONE;
1129         }
1130
1131         if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
1132                 priv->dim.event_ctr++;
1133                 if (likely(napi_schedule_prep(&priv->napi))) {
1134                         /* disable RX interrupts */
1135                         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
1136                         __napi_schedule_irqoff(&priv->napi);
1137                 }
1138         }
1139
1140         /* TX ring is full, perform a full reclaim since we do not know
1141          * which one would trigger this interrupt
1142          */
1143         if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
1144                 bcm_sysport_tx_reclaim_all(priv);
1145
1146         if (!priv->is_lite)
1147                 goto out;
1148
1149         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1150                 ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT);
1151                 if (!(priv->irq0_stat & ring_bit))
1152                         continue;
1153
1154                 txr = &priv->tx_rings[ring];
1155
1156                 if (likely(napi_schedule_prep(&txr->napi))) {
1157                         intrl2_0_mask_set(priv, ring_bit);
1158                         __napi_schedule(&txr->napi);
1159                 }
1160         }
1161 out:
1162         return IRQ_HANDLED;
1163 }
1164
1165 /* TX interrupt service routine */
1166 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
1167 {
1168         struct net_device *dev = dev_id;
1169         struct bcm_sysport_priv *priv = netdev_priv(dev);
1170         struct bcm_sysport_tx_ring *txr;
1171         unsigned int ring;
1172
1173         priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
1174                                 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
1175         intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1176
1177         if (unlikely(priv->irq1_stat == 0)) {
1178                 netdev_warn(priv->netdev, "spurious TX interrupt\n");
1179                 return IRQ_NONE;
1180         }
1181
1182         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1183                 if (!(priv->irq1_stat & BIT(ring)))
1184                         continue;
1185
1186                 txr = &priv->tx_rings[ring];
1187
1188                 if (likely(napi_schedule_prep(&txr->napi))) {
1189                         intrl2_1_mask_set(priv, BIT(ring));
1190                         __napi_schedule_irqoff(&txr->napi);
1191                 }
1192         }
1193
1194         return IRQ_HANDLED;
1195 }
1196
1197 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
1198 {
1199         struct bcm_sysport_priv *priv = dev_id;
1200
1201         pm_wakeup_event(&priv->pdev->dev, 0);
1202
1203         return IRQ_HANDLED;
1204 }
1205
1206 #ifdef CONFIG_NET_POLL_CONTROLLER
1207 static void bcm_sysport_poll_controller(struct net_device *dev)
1208 {
1209         struct bcm_sysport_priv *priv = netdev_priv(dev);
1210
1211         disable_irq(priv->irq0);
1212         bcm_sysport_rx_isr(priv->irq0, priv);
1213         enable_irq(priv->irq0);
1214
1215         if (!priv->is_lite) {
1216                 disable_irq(priv->irq1);
1217                 bcm_sysport_tx_isr(priv->irq1, priv);
1218                 enable_irq(priv->irq1);
1219         }
1220 }
1221 #endif
1222
1223 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
1224                                               struct net_device *dev)
1225 {
1226         struct bcm_sysport_priv *priv = netdev_priv(dev);
1227         struct sk_buff *nskb;
1228         struct bcm_tsb *tsb;
1229         u32 csum_info;
1230         u8 ip_proto;
1231         u16 csum_start;
1232         __be16 ip_ver;
1233
1234         /* Re-allocate SKB if needed */
1235         if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
1236                 nskb = skb_realloc_headroom(skb, sizeof(*tsb));
1237                 if (!nskb) {
1238                         dev_kfree_skb_any(skb);
1239                         priv->mib.tx_realloc_tsb_failed++;
1240                         dev->stats.tx_errors++;
1241                         dev->stats.tx_dropped++;
1242                         return NULL;
1243                 }
1244                 dev_consume_skb_any(skb);
1245                 skb = nskb;
1246                 priv->mib.tx_realloc_tsb++;
1247         }
1248
1249         tsb = skb_push(skb, sizeof(*tsb));
1250         /* Zero-out TSB by default */
1251         memset(tsb, 0, sizeof(*tsb));
1252
1253         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1254                 ip_ver = skb->protocol;
1255                 switch (ip_ver) {
1256                 case htons(ETH_P_IP):
1257                         ip_proto = ip_hdr(skb)->protocol;
1258                         break;
1259                 case htons(ETH_P_IPV6):
1260                         ip_proto = ipv6_hdr(skb)->nexthdr;
1261                         break;
1262                 default:
1263                         return skb;
1264                 }
1265
1266                 /* Get the checksum offset and the L4 (transport) offset */
1267                 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
1268                 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
1269                 csum_info |= (csum_start << L4_PTR_SHIFT);
1270
1271                 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1272                         csum_info |= L4_LENGTH_VALID;
1273                         if (ip_proto == IPPROTO_UDP &&
1274                             ip_ver == htons(ETH_P_IP))
1275                                 csum_info |= L4_UDP;
1276                 } else {
1277                         csum_info = 0;
1278                 }
1279
1280                 tsb->l4_ptr_dest_map = csum_info;
1281         }
1282
1283         return skb;
1284 }
1285
1286 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
1287                                     struct net_device *dev)
1288 {
1289         struct bcm_sysport_priv *priv = netdev_priv(dev);
1290         struct device *kdev = &priv->pdev->dev;
1291         struct bcm_sysport_tx_ring *ring;
1292         struct bcm_sysport_cb *cb;
1293         struct netdev_queue *txq;
1294         struct dma_desc *desc;
1295         unsigned int skb_len;
1296         unsigned long flags;
1297         dma_addr_t mapping;
1298         u32 len_status;
1299         u16 queue;
1300         int ret;
1301
1302         queue = skb_get_queue_mapping(skb);
1303         txq = netdev_get_tx_queue(dev, queue);
1304         ring = &priv->tx_rings[queue];
1305
1306         /* lock against tx reclaim in BH context and TX ring full interrupt */
1307         spin_lock_irqsave(&ring->lock, flags);
1308         if (unlikely(ring->desc_count == 0)) {
1309                 netif_tx_stop_queue(txq);
1310                 netdev_err(dev, "queue %d awake and ring full!\n", queue);
1311                 ret = NETDEV_TX_BUSY;
1312                 goto out;
1313         }
1314
1315         /* Insert TSB and checksum infos */
1316         if (priv->tsb_en) {
1317                 skb = bcm_sysport_insert_tsb(skb, dev);
1318                 if (!skb) {
1319                         ret = NETDEV_TX_OK;
1320                         goto out;
1321                 }
1322         }
1323
1324         skb_len = skb->len;
1325
1326         mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1327         if (dma_mapping_error(kdev, mapping)) {
1328                 priv->mib.tx_dma_failed++;
1329                 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
1330                           skb->data, skb_len);
1331                 ret = NETDEV_TX_OK;
1332                 goto out;
1333         }
1334
1335         /* Remember the SKB for future freeing */
1336         cb = &ring->cbs[ring->curr_desc];
1337         cb->skb = skb;
1338         dma_unmap_addr_set(cb, dma_addr, mapping);
1339         dma_unmap_len_set(cb, dma_len, skb_len);
1340
1341         /* Fetch a descriptor entry from our pool */
1342         desc = ring->desc_cpu;
1343
1344         desc->addr_lo = lower_32_bits(mapping);
1345         len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
1346         len_status |= (skb_len << DESC_LEN_SHIFT);
1347         len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
1348                        DESC_STATUS_SHIFT;
1349         if (skb->ip_summed == CHECKSUM_PARTIAL)
1350                 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1351
1352         ring->curr_desc++;
1353         if (ring->curr_desc == ring->size)
1354                 ring->curr_desc = 0;
1355         ring->desc_count--;
1356
1357         /* Ensure write completion of the descriptor status/length
1358          * in DRAM before the System Port WRITE_PORT register latches
1359          * the value
1360          */
1361         wmb();
1362         desc->addr_status_len = len_status;
1363         wmb();
1364
1365         /* Write this descriptor address to the RING write port */
1366         tdma_port_write_desc_addr(priv, desc, ring->index);
1367
1368         /* Check ring space and update SW control flow */
1369         if (ring->desc_count == 0)
1370                 netif_tx_stop_queue(txq);
1371
1372         netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
1373                   ring->index, ring->desc_count, ring->curr_desc);
1374
1375         ret = NETDEV_TX_OK;
1376 out:
1377         spin_unlock_irqrestore(&ring->lock, flags);
1378         return ret;
1379 }
1380
1381 static void bcm_sysport_tx_timeout(struct net_device *dev)
1382 {
1383         netdev_warn(dev, "transmit timeout!\n");
1384
1385         netif_trans_update(dev);
1386         dev->stats.tx_errors++;
1387
1388         netif_tx_wake_all_queues(dev);
1389 }
1390
1391 /* phylib adjust link callback */
1392 static void bcm_sysport_adj_link(struct net_device *dev)
1393 {
1394         struct bcm_sysport_priv *priv = netdev_priv(dev);
1395         struct phy_device *phydev = dev->phydev;
1396         unsigned int changed = 0;
1397         u32 cmd_bits = 0, reg;
1398
1399         if (priv->old_link != phydev->link) {
1400                 changed = 1;
1401                 priv->old_link = phydev->link;
1402         }
1403
1404         if (priv->old_duplex != phydev->duplex) {
1405                 changed = 1;
1406                 priv->old_duplex = phydev->duplex;
1407         }
1408
1409         if (priv->is_lite)
1410                 goto out;
1411
1412         switch (phydev->speed) {
1413         case SPEED_2500:
1414                 cmd_bits = CMD_SPEED_2500;
1415                 break;
1416         case SPEED_1000:
1417                 cmd_bits = CMD_SPEED_1000;
1418                 break;
1419         case SPEED_100:
1420                 cmd_bits = CMD_SPEED_100;
1421                 break;
1422         case SPEED_10:
1423                 cmd_bits = CMD_SPEED_10;
1424                 break;
1425         default:
1426                 break;
1427         }
1428         cmd_bits <<= CMD_SPEED_SHIFT;
1429
1430         if (phydev->duplex == DUPLEX_HALF)
1431                 cmd_bits |= CMD_HD_EN;
1432
1433         if (priv->old_pause != phydev->pause) {
1434                 changed = 1;
1435                 priv->old_pause = phydev->pause;
1436         }
1437
1438         if (!phydev->pause)
1439                 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1440
1441         if (!changed)
1442                 return;
1443
1444         if (phydev->link) {
1445                 reg = umac_readl(priv, UMAC_CMD);
1446                 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
1447                         CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1448                         CMD_TX_PAUSE_IGNORE);
1449                 reg |= cmd_bits;
1450                 umac_writel(priv, reg, UMAC_CMD);
1451         }
1452 out:
1453         if (changed)
1454                 phy_print_status(phydev);
1455 }
1456
1457 static void bcm_sysport_init_dim(struct bcm_sysport_priv *priv,
1458                                  void (*cb)(struct work_struct *work))
1459 {
1460         struct bcm_sysport_net_dim *dim = &priv->dim;
1461
1462         INIT_WORK(&dim->dim.work, cb);
1463         dim->dim.mode = NET_DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1464         dim->event_ctr = 0;
1465         dim->packets = 0;
1466         dim->bytes = 0;
1467 }
1468
1469 static void bcm_sysport_init_rx_coalesce(struct bcm_sysport_priv *priv)
1470 {
1471         struct bcm_sysport_net_dim *dim = &priv->dim;
1472         struct net_dim_cq_moder moder;
1473         u32 usecs, pkts;
1474
1475         usecs = priv->rx_coalesce_usecs;
1476         pkts = priv->rx_max_coalesced_frames;
1477
1478         /* If DIM was enabled, re-apply default parameters */
1479         if (dim->use_dim) {
1480                 moder = net_dim_get_def_rx_moderation(dim->dim.mode);
1481                 usecs = moder.usec;
1482                 pkts = moder.pkts;
1483         }
1484
1485         bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
1486 }
1487
1488 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1489                                     unsigned int index)
1490 {
1491         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1492         struct device *kdev = &priv->pdev->dev;
1493         size_t size;
1494         void *p;
1495         u32 reg;
1496
1497         /* Simple descriptors partitioning for now */
1498         size = 256;
1499
1500         /* We just need one DMA descriptor which is DMA-able, since writing to
1501          * the port will allocate a new descriptor in its internal linked-list
1502          */
1503         p = dma_alloc_coherent(kdev, sizeof(struct dma_desc), &ring->desc_dma,
1504                                GFP_KERNEL);
1505         if (!p) {
1506                 netif_err(priv, hw, priv->netdev, "DMA alloc failed\n");
1507                 return -ENOMEM;
1508         }
1509
1510         ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1511         if (!ring->cbs) {
1512                 dma_free_coherent(kdev, sizeof(struct dma_desc),
1513                                   ring->desc_cpu, ring->desc_dma);
1514                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1515                 return -ENOMEM;
1516         }
1517
1518         /* Initialize SW view of the ring */
1519         spin_lock_init(&ring->lock);
1520         ring->priv = priv;
1521         netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64);
1522         ring->index = index;
1523         ring->size = size;
1524         ring->clean_index = 0;
1525         ring->alloc_size = ring->size;
1526         ring->desc_cpu = p;
1527         ring->desc_count = ring->size;
1528         ring->curr_desc = 0;
1529
1530         /* Initialize HW ring */
1531         tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1532         tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1533         tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1534         tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1535
1536         /* Configure QID and port mapping */
1537         reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index));
1538         reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT);
1539         if (ring->inspect) {
1540                 reg |= ring->switch_queue & RING_QID_MASK;
1541                 reg |= ring->switch_port << RING_PORT_ID_SHIFT;
1542         } else {
1543                 reg |= RING_IGNORE_STATUS;
1544         }
1545         tdma_writel(priv, reg, TDMA_DESC_RING_MAPPING(index));
1546         tdma_writel(priv, 0, TDMA_DESC_RING_PCP_DEI_VID(index));
1547
1548         /* Enable ACB algorithm 2 */
1549         reg = tdma_readl(priv, TDMA_CONTROL);
1550         reg |= tdma_control_bit(priv, ACB_ALGO);
1551         tdma_writel(priv, reg, TDMA_CONTROL);
1552
1553         /* Do not use tdma_control_bit() here because TSB_SWAP1 collides
1554          * with the original definition of ACB_ALGO
1555          */
1556         reg = tdma_readl(priv, TDMA_CONTROL);
1557         if (priv->is_lite)
1558                 reg &= ~BIT(TSB_SWAP1);
1559         /* Set a correct TSB format based on host endian */
1560         if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1561                 reg |= tdma_control_bit(priv, TSB_SWAP0);
1562         else
1563                 reg &= ~tdma_control_bit(priv, TSB_SWAP0);
1564         tdma_writel(priv, reg, TDMA_CONTROL);
1565
1566         /* Program the number of descriptors as MAX_THRESHOLD and half of
1567          * its size for the hysteresis trigger
1568          */
1569         tdma_writel(priv, ring->size |
1570                         1 << RING_HYST_THRESH_SHIFT,
1571                         TDMA_DESC_RING_MAX_HYST(index));
1572
1573         /* Enable the ring queue in the arbiter */
1574         reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1575         reg |= (1 << index);
1576         tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1577
1578         napi_enable(&ring->napi);
1579
1580         netif_dbg(priv, hw, priv->netdev,
1581                   "TDMA cfg, size=%d, desc_cpu=%p switch q=%d,port=%d\n",
1582                   ring->size, ring->desc_cpu, ring->switch_queue,
1583                   ring->switch_port);
1584
1585         return 0;
1586 }
1587
1588 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1589                                      unsigned int index)
1590 {
1591         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1592         struct device *kdev = &priv->pdev->dev;
1593         u32 reg;
1594
1595         /* Caller should stop the TDMA engine */
1596         reg = tdma_readl(priv, TDMA_STATUS);
1597         if (!(reg & TDMA_DISABLED))
1598                 netdev_warn(priv->netdev, "TDMA not stopped!\n");
1599
1600         /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1601          * fail, so by checking this pointer we know whether the TX ring was
1602          * fully initialized or not.
1603          */
1604         if (!ring->cbs)
1605                 return;
1606
1607         napi_disable(&ring->napi);
1608         netif_napi_del(&ring->napi);
1609
1610         bcm_sysport_tx_clean(priv, ring);
1611
1612         kfree(ring->cbs);
1613         ring->cbs = NULL;
1614
1615         if (ring->desc_dma) {
1616                 dma_free_coherent(kdev, sizeof(struct dma_desc),
1617                                   ring->desc_cpu, ring->desc_dma);
1618                 ring->desc_dma = 0;
1619         }
1620         ring->size = 0;
1621         ring->alloc_size = 0;
1622
1623         netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1624 }
1625
1626 /* RDMA helper */
1627 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1628                                   unsigned int enable)
1629 {
1630         unsigned int timeout = 1000;
1631         u32 reg;
1632
1633         reg = rdma_readl(priv, RDMA_CONTROL);
1634         if (enable)
1635                 reg |= RDMA_EN;
1636         else
1637                 reg &= ~RDMA_EN;
1638         rdma_writel(priv, reg, RDMA_CONTROL);
1639
1640         /* Poll for RMDA disabling completion */
1641         do {
1642                 reg = rdma_readl(priv, RDMA_STATUS);
1643                 if (!!(reg & RDMA_DISABLED) == !enable)
1644                         return 0;
1645                 usleep_range(1000, 2000);
1646         } while (timeout-- > 0);
1647
1648         netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1649
1650         return -ETIMEDOUT;
1651 }
1652
1653 /* TDMA helper */
1654 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1655                                   unsigned int enable)
1656 {
1657         unsigned int timeout = 1000;
1658         u32 reg;
1659
1660         reg = tdma_readl(priv, TDMA_CONTROL);
1661         if (enable)
1662                 reg |= tdma_control_bit(priv, TDMA_EN);
1663         else
1664                 reg &= ~tdma_control_bit(priv, TDMA_EN);
1665         tdma_writel(priv, reg, TDMA_CONTROL);
1666
1667         /* Poll for TMDA disabling completion */
1668         do {
1669                 reg = tdma_readl(priv, TDMA_STATUS);
1670                 if (!!(reg & TDMA_DISABLED) == !enable)
1671                         return 0;
1672
1673                 usleep_range(1000, 2000);
1674         } while (timeout-- > 0);
1675
1676         netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1677
1678         return -ETIMEDOUT;
1679 }
1680
1681 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1682 {
1683         struct bcm_sysport_cb *cb;
1684         u32 reg;
1685         int ret;
1686         int i;
1687
1688         /* Initialize SW view of the RX ring */
1689         priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC;
1690         priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1691         priv->rx_c_index = 0;
1692         priv->rx_read_ptr = 0;
1693         priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1694                                 GFP_KERNEL);
1695         if (!priv->rx_cbs) {
1696                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1697                 return -ENOMEM;
1698         }
1699
1700         for (i = 0; i < priv->num_rx_bds; i++) {
1701                 cb = priv->rx_cbs + i;
1702                 cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1703         }
1704
1705         ret = bcm_sysport_alloc_rx_bufs(priv);
1706         if (ret) {
1707                 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1708                 return ret;
1709         }
1710
1711         /* Initialize HW, ensure RDMA is disabled */
1712         reg = rdma_readl(priv, RDMA_STATUS);
1713         if (!(reg & RDMA_DISABLED))
1714                 rdma_enable_set(priv, 0);
1715
1716         rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1717         rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1718         rdma_writel(priv, 0, RDMA_PROD_INDEX);
1719         rdma_writel(priv, 0, RDMA_CONS_INDEX);
1720         rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1721                           RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1722         /* Operate the queue in ring mode */
1723         rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1724         rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1725         rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1726         rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO);
1727
1728         netif_dbg(priv, hw, priv->netdev,
1729                   "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1730                   priv->num_rx_bds, priv->rx_bds);
1731
1732         return 0;
1733 }
1734
1735 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1736 {
1737         struct bcm_sysport_cb *cb;
1738         unsigned int i;
1739         u32 reg;
1740
1741         /* Caller should ensure RDMA is disabled */
1742         reg = rdma_readl(priv, RDMA_STATUS);
1743         if (!(reg & RDMA_DISABLED))
1744                 netdev_warn(priv->netdev, "RDMA not stopped!\n");
1745
1746         for (i = 0; i < priv->num_rx_bds; i++) {
1747                 cb = &priv->rx_cbs[i];
1748                 if (dma_unmap_addr(cb, dma_addr))
1749                         dma_unmap_single(&priv->pdev->dev,
1750                                          dma_unmap_addr(cb, dma_addr),
1751                                          RX_BUF_LENGTH, DMA_FROM_DEVICE);
1752                 bcm_sysport_free_cb(cb);
1753         }
1754
1755         kfree(priv->rx_cbs);
1756         priv->rx_cbs = NULL;
1757
1758         netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1759 }
1760
1761 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1762 {
1763         struct bcm_sysport_priv *priv = netdev_priv(dev);
1764         u32 reg;
1765
1766         if (priv->is_lite)
1767                 return;
1768
1769         reg = umac_readl(priv, UMAC_CMD);
1770         if (dev->flags & IFF_PROMISC)
1771                 reg |= CMD_PROMISC;
1772         else
1773                 reg &= ~CMD_PROMISC;
1774         umac_writel(priv, reg, UMAC_CMD);
1775
1776         /* No support for ALLMULTI */
1777         if (dev->flags & IFF_ALLMULTI)
1778                 return;
1779 }
1780
1781 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1782                                    u32 mask, unsigned int enable)
1783 {
1784         u32 reg;
1785
1786         if (!priv->is_lite) {
1787                 reg = umac_readl(priv, UMAC_CMD);
1788                 if (enable)
1789                         reg |= mask;
1790                 else
1791                         reg &= ~mask;
1792                 umac_writel(priv, reg, UMAC_CMD);
1793         } else {
1794                 reg = gib_readl(priv, GIB_CONTROL);
1795                 if (enable)
1796                         reg |= mask;
1797                 else
1798                         reg &= ~mask;
1799                 gib_writel(priv, reg, GIB_CONTROL);
1800         }
1801
1802         /* UniMAC stops on a packet boundary, wait for a full-sized packet
1803          * to be processed (1 msec).
1804          */
1805         if (enable == 0)
1806                 usleep_range(1000, 2000);
1807 }
1808
1809 static inline void umac_reset(struct bcm_sysport_priv *priv)
1810 {
1811         u32 reg;
1812
1813         if (priv->is_lite)
1814                 return;
1815
1816         reg = umac_readl(priv, UMAC_CMD);
1817         reg |= CMD_SW_RESET;
1818         umac_writel(priv, reg, UMAC_CMD);
1819         udelay(10);
1820         reg = umac_readl(priv, UMAC_CMD);
1821         reg &= ~CMD_SW_RESET;
1822         umac_writel(priv, reg, UMAC_CMD);
1823 }
1824
1825 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1826                              unsigned char *addr)
1827 {
1828         u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) |
1829                     addr[3];
1830         u32 mac1 = (addr[4] << 8) | addr[5];
1831
1832         if (!priv->is_lite) {
1833                 umac_writel(priv, mac0, UMAC_MAC0);
1834                 umac_writel(priv, mac1, UMAC_MAC1);
1835         } else {
1836                 gib_writel(priv, mac0, GIB_MAC0);
1837                 gib_writel(priv, mac1, GIB_MAC1);
1838         }
1839 }
1840
1841 static void topctrl_flush(struct bcm_sysport_priv *priv)
1842 {
1843         topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1844         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1845         mdelay(1);
1846         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1847         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1848 }
1849
1850 static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1851 {
1852         struct bcm_sysport_priv *priv = netdev_priv(dev);
1853         struct sockaddr *addr = p;
1854
1855         if (!is_valid_ether_addr(addr->sa_data))
1856                 return -EINVAL;
1857
1858         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1859
1860         /* interface is disabled, changes to MAC will be reflected on next
1861          * open call
1862          */
1863         if (!netif_running(dev))
1864                 return 0;
1865
1866         umac_set_hw_addr(priv, dev->dev_addr);
1867
1868         return 0;
1869 }
1870
1871 static void bcm_sysport_get_stats64(struct net_device *dev,
1872                                     struct rtnl_link_stats64 *stats)
1873 {
1874         struct bcm_sysport_priv *priv = netdev_priv(dev);
1875         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
1876         unsigned int start;
1877
1878         netdev_stats_to_stats64(stats, &dev->stats);
1879
1880         bcm_sysport_update_tx_stats(priv, &stats->tx_bytes,
1881                                     &stats->tx_packets);
1882
1883         do {
1884                 start = u64_stats_fetch_begin_irq(&priv->syncp);
1885                 stats->rx_packets = stats64->rx_packets;
1886                 stats->rx_bytes = stats64->rx_bytes;
1887         } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
1888 }
1889
1890 static void bcm_sysport_netif_start(struct net_device *dev)
1891 {
1892         struct bcm_sysport_priv *priv = netdev_priv(dev);
1893
1894         /* Enable NAPI */
1895         bcm_sysport_init_dim(priv, bcm_sysport_dim_work);
1896         bcm_sysport_init_rx_coalesce(priv);
1897         napi_enable(&priv->napi);
1898
1899         /* Enable RX interrupt and TX ring full interrupt */
1900         intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1901
1902         phy_start(dev->phydev);
1903
1904         /* Enable TX interrupts for the TXQs */
1905         if (!priv->is_lite)
1906                 intrl2_1_mask_clear(priv, 0xffffffff);
1907         else
1908                 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK);
1909 }
1910
1911 static void rbuf_init(struct bcm_sysport_priv *priv)
1912 {
1913         u32 reg;
1914
1915         reg = rbuf_readl(priv, RBUF_CONTROL);
1916         reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1917         /* Set a correct RSB format on SYSTEMPORT Lite */
1918         if (priv->is_lite)
1919                 reg &= ~RBUF_RSB_SWAP1;
1920
1921         /* Set a correct RSB format based on host endian */
1922         if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1923                 reg |= RBUF_RSB_SWAP0;
1924         else
1925                 reg &= ~RBUF_RSB_SWAP0;
1926         rbuf_writel(priv, reg, RBUF_CONTROL);
1927 }
1928
1929 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv)
1930 {
1931         intrl2_0_mask_set(priv, 0xffffffff);
1932         intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1933         if (!priv->is_lite) {
1934                 intrl2_1_mask_set(priv, 0xffffffff);
1935                 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1936         }
1937 }
1938
1939 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv)
1940 {
1941         u32 reg;
1942
1943         reg = gib_readl(priv, GIB_CONTROL);
1944         /* Include Broadcom tag in pad extension and fix up IPG_LENGTH */
1945         if (netdev_uses_dsa(priv->netdev)) {
1946                 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT);
1947                 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT;
1948         }
1949         reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT);
1950         reg |= 12 << GIB_IPG_LEN_SHIFT;
1951         gib_writel(priv, reg, GIB_CONTROL);
1952 }
1953
1954 static int bcm_sysport_open(struct net_device *dev)
1955 {
1956         struct bcm_sysport_priv *priv = netdev_priv(dev);
1957         struct phy_device *phydev;
1958         unsigned int i;
1959         int ret;
1960
1961         /* Reset UniMAC */
1962         umac_reset(priv);
1963
1964         /* Flush TX and RX FIFOs at TOPCTRL level */
1965         topctrl_flush(priv);
1966
1967         /* Disable the UniMAC RX/TX */
1968         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1969
1970         /* Enable RBUF 2bytes alignment and Receive Status Block */
1971         rbuf_init(priv);
1972
1973         /* Set maximum frame length */
1974         if (!priv->is_lite)
1975                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1976         else
1977                 gib_set_pad_extension(priv);
1978
1979         /* Apply features again in case we changed them while interface was
1980          * down
1981          */
1982         bcm_sysport_set_features(dev, dev->features);
1983
1984         /* Set MAC address */
1985         umac_set_hw_addr(priv, dev->dev_addr);
1986
1987         phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1988                                 0, priv->phy_interface);
1989         if (!phydev) {
1990                 netdev_err(dev, "could not attach to PHY\n");
1991                 return -ENODEV;
1992         }
1993
1994         /* Reset house keeping link status */
1995         priv->old_duplex = -1;
1996         priv->old_link = -1;
1997         priv->old_pause = -1;
1998
1999         /* mask all interrupts and request them */
2000         bcm_sysport_mask_all_intrs(priv);
2001
2002         ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
2003         if (ret) {
2004                 netdev_err(dev, "failed to request RX interrupt\n");
2005                 goto out_phy_disconnect;
2006         }
2007
2008         if (!priv->is_lite) {
2009                 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0,
2010                                   dev->name, dev);
2011                 if (ret) {
2012                         netdev_err(dev, "failed to request TX interrupt\n");
2013                         goto out_free_irq0;
2014                 }
2015         }
2016
2017         /* Initialize both hardware and software ring */
2018         for (i = 0; i < dev->num_tx_queues; i++) {
2019                 ret = bcm_sysport_init_tx_ring(priv, i);
2020                 if (ret) {
2021                         netdev_err(dev, "failed to initialize TX ring %d\n",
2022                                    i);
2023                         goto out_free_tx_ring;
2024                 }
2025         }
2026
2027         /* Initialize linked-list */
2028         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2029
2030         /* Initialize RX ring */
2031         ret = bcm_sysport_init_rx_ring(priv);
2032         if (ret) {
2033                 netdev_err(dev, "failed to initialize RX ring\n");
2034                 goto out_free_rx_ring;
2035         }
2036
2037         /* Turn on RDMA */
2038         ret = rdma_enable_set(priv, 1);
2039         if (ret)
2040                 goto out_free_rx_ring;
2041
2042         /* Turn on TDMA */
2043         ret = tdma_enable_set(priv, 1);
2044         if (ret)
2045                 goto out_clear_rx_int;
2046
2047         /* Turn on UniMAC TX/RX */
2048         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
2049
2050         bcm_sysport_netif_start(dev);
2051
2052         netif_tx_start_all_queues(dev);
2053
2054         return 0;
2055
2056 out_clear_rx_int:
2057         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
2058 out_free_rx_ring:
2059         bcm_sysport_fini_rx_ring(priv);
2060 out_free_tx_ring:
2061         for (i = 0; i < dev->num_tx_queues; i++)
2062                 bcm_sysport_fini_tx_ring(priv, i);
2063         if (!priv->is_lite)
2064                 free_irq(priv->irq1, dev);
2065 out_free_irq0:
2066         free_irq(priv->irq0, dev);
2067 out_phy_disconnect:
2068         phy_disconnect(phydev);
2069         return ret;
2070 }
2071
2072 static void bcm_sysport_netif_stop(struct net_device *dev)
2073 {
2074         struct bcm_sysport_priv *priv = netdev_priv(dev);
2075
2076         /* stop all software from updating hardware */
2077         netif_tx_disable(dev);
2078         napi_disable(&priv->napi);
2079         cancel_work_sync(&priv->dim.dim.work);
2080         phy_stop(dev->phydev);
2081
2082         /* mask all interrupts */
2083         bcm_sysport_mask_all_intrs(priv);
2084 }
2085
2086 static int bcm_sysport_stop(struct net_device *dev)
2087 {
2088         struct bcm_sysport_priv *priv = netdev_priv(dev);
2089         unsigned int i;
2090         int ret;
2091
2092         bcm_sysport_netif_stop(dev);
2093
2094         /* Disable UniMAC RX */
2095         umac_enable_set(priv, CMD_RX_EN, 0);
2096
2097         ret = tdma_enable_set(priv, 0);
2098         if (ret) {
2099                 netdev_err(dev, "timeout disabling RDMA\n");
2100                 return ret;
2101         }
2102
2103         /* Wait for a maximum packet size to be drained */
2104         usleep_range(2000, 3000);
2105
2106         ret = rdma_enable_set(priv, 0);
2107         if (ret) {
2108                 netdev_err(dev, "timeout disabling TDMA\n");
2109                 return ret;
2110         }
2111
2112         /* Disable UniMAC TX */
2113         umac_enable_set(priv, CMD_TX_EN, 0);
2114
2115         /* Free RX/TX rings SW structures */
2116         for (i = 0; i < dev->num_tx_queues; i++)
2117                 bcm_sysport_fini_tx_ring(priv, i);
2118         bcm_sysport_fini_rx_ring(priv);
2119
2120         free_irq(priv->irq0, dev);
2121         if (!priv->is_lite)
2122                 free_irq(priv->irq1, dev);
2123
2124         /* Disconnect from PHY */
2125         phy_disconnect(dev->phydev);
2126
2127         return 0;
2128 }
2129
2130 static int bcm_sysport_rule_find(struct bcm_sysport_priv *priv,
2131                                  u64 location)
2132 {
2133         unsigned int index;
2134         u32 reg;
2135
2136         for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2137                 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2138                 reg >>= RXCHK_BRCM_TAG_CID_SHIFT;
2139                 reg &= RXCHK_BRCM_TAG_CID_MASK;
2140                 if (reg == location)
2141                         return index;
2142         }
2143
2144         return -EINVAL;
2145 }
2146
2147 static int bcm_sysport_rule_get(struct bcm_sysport_priv *priv,
2148                                 struct ethtool_rxnfc *nfc)
2149 {
2150         int index;
2151
2152         /* This is not a rule that we know about */
2153         index = bcm_sysport_rule_find(priv, nfc->fs.location);
2154         if (index < 0)
2155                 return -EOPNOTSUPP;
2156
2157         nfc->fs.ring_cookie = RX_CLS_FLOW_WAKE;
2158
2159         return 0;
2160 }
2161
2162 static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv,
2163                                 struct ethtool_rxnfc *nfc)
2164 {
2165         unsigned int index;
2166         u32 reg;
2167
2168         /* We cannot match locations greater than what the classification ID
2169          * permits (256 entries)
2170          */
2171         if (nfc->fs.location > RXCHK_BRCM_TAG_CID_MASK)
2172                 return -E2BIG;
2173
2174         /* We cannot support flows that are not destined for a wake-up */
2175         if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE)
2176                 return -EOPNOTSUPP;
2177
2178         /* All filters are already in use, we cannot match more rules */
2179         if (bitmap_weight(priv->filters, RXCHK_BRCM_TAG_MAX) ==
2180             RXCHK_BRCM_TAG_MAX)
2181                 return -ENOSPC;
2182
2183         index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX);
2184         if (index > RXCHK_BRCM_TAG_MAX)
2185                 return -ENOSPC;
2186
2187         /* Location is the classification ID, and index is the position
2188          * within one of our 8 possible filters to be programmed
2189          */
2190         reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2191         reg &= ~(RXCHK_BRCM_TAG_CID_MASK << RXCHK_BRCM_TAG_CID_SHIFT);
2192         reg |= nfc->fs.location << RXCHK_BRCM_TAG_CID_SHIFT;
2193         rxchk_writel(priv, reg, RXCHK_BRCM_TAG(index));
2194         rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
2195
2196         priv->filters_loc[index] = nfc->fs.location;
2197         set_bit(index, priv->filters);
2198
2199         return 0;
2200 }
2201
2202 static int bcm_sysport_rule_del(struct bcm_sysport_priv *priv,
2203                                 u64 location)
2204 {
2205         int index;
2206
2207         /* This is not a rule that we know about */
2208         index = bcm_sysport_rule_find(priv, location);
2209         if (index < 0)
2210                 return -EOPNOTSUPP;
2211
2212         /* No need to disable this filter if it was enabled, this will
2213          * be taken care of during suspend time by bcm_sysport_suspend_to_wol
2214          */
2215         clear_bit(index, priv->filters);
2216         priv->filters_loc[index] = 0;
2217
2218         return 0;
2219 }
2220
2221 static int bcm_sysport_get_rxnfc(struct net_device *dev,
2222                                  struct ethtool_rxnfc *nfc, u32 *rule_locs)
2223 {
2224         struct bcm_sysport_priv *priv = netdev_priv(dev);
2225         int ret = -EOPNOTSUPP;
2226
2227         switch (nfc->cmd) {
2228         case ETHTOOL_GRXCLSRULE:
2229                 ret = bcm_sysport_rule_get(priv, nfc);
2230                 break;
2231         default:
2232                 break;
2233         }
2234
2235         return ret;
2236 }
2237
2238 static int bcm_sysport_set_rxnfc(struct net_device *dev,
2239                                  struct ethtool_rxnfc *nfc)
2240 {
2241         struct bcm_sysport_priv *priv = netdev_priv(dev);
2242         int ret = -EOPNOTSUPP;
2243
2244         switch (nfc->cmd) {
2245         case ETHTOOL_SRXCLSRLINS:
2246                 ret = bcm_sysport_rule_set(priv, nfc);
2247                 break;
2248         case ETHTOOL_SRXCLSRLDEL:
2249                 ret = bcm_sysport_rule_del(priv, nfc->fs.location);
2250                 break;
2251         default:
2252                 break;
2253         }
2254
2255         return ret;
2256 }
2257
2258 static const struct ethtool_ops bcm_sysport_ethtool_ops = {
2259         .get_drvinfo            = bcm_sysport_get_drvinfo,
2260         .get_msglevel           = bcm_sysport_get_msglvl,
2261         .set_msglevel           = bcm_sysport_set_msglvl,
2262         .get_link               = ethtool_op_get_link,
2263         .get_strings            = bcm_sysport_get_strings,
2264         .get_ethtool_stats      = bcm_sysport_get_stats,
2265         .get_sset_count         = bcm_sysport_get_sset_count,
2266         .get_wol                = bcm_sysport_get_wol,
2267         .set_wol                = bcm_sysport_set_wol,
2268         .get_coalesce           = bcm_sysport_get_coalesce,
2269         .set_coalesce           = bcm_sysport_set_coalesce,
2270         .get_link_ksettings     = phy_ethtool_get_link_ksettings,
2271         .set_link_ksettings     = phy_ethtool_set_link_ksettings,
2272         .get_rxnfc              = bcm_sysport_get_rxnfc,
2273         .set_rxnfc              = bcm_sysport_set_rxnfc,
2274 };
2275
2276 static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb,
2277                                     struct net_device *sb_dev,
2278                                     select_queue_fallback_t fallback)
2279 {
2280         struct bcm_sysport_priv *priv = netdev_priv(dev);
2281         u16 queue = skb_get_queue_mapping(skb);
2282         struct bcm_sysport_tx_ring *tx_ring;
2283         unsigned int q, port;
2284
2285         if (!netdev_uses_dsa(dev))
2286                 return fallback(dev, skb, NULL);
2287
2288         /* DSA tagging layer will have configured the correct queue */
2289         q = BRCM_TAG_GET_QUEUE(queue);
2290         port = BRCM_TAG_GET_PORT(queue);
2291         tx_ring = priv->ring_map[q + port * priv->per_port_num_tx_queues];
2292
2293         if (unlikely(!tx_ring))
2294                 return fallback(dev, skb, NULL);
2295
2296         return tx_ring->index;
2297 }
2298
2299 static const struct net_device_ops bcm_sysport_netdev_ops = {
2300         .ndo_start_xmit         = bcm_sysport_xmit,
2301         .ndo_tx_timeout         = bcm_sysport_tx_timeout,
2302         .ndo_open               = bcm_sysport_open,
2303         .ndo_stop               = bcm_sysport_stop,
2304         .ndo_set_features       = bcm_sysport_set_features,
2305         .ndo_set_rx_mode        = bcm_sysport_set_rx_mode,
2306         .ndo_set_mac_address    = bcm_sysport_change_mac,
2307 #ifdef CONFIG_NET_POLL_CONTROLLER
2308         .ndo_poll_controller    = bcm_sysport_poll_controller,
2309 #endif
2310         .ndo_get_stats64        = bcm_sysport_get_stats64,
2311         .ndo_select_queue       = bcm_sysport_select_queue,
2312 };
2313
2314 static int bcm_sysport_map_queues(struct notifier_block *nb,
2315                                   struct dsa_notifier_register_info *info)
2316 {
2317         struct bcm_sysport_tx_ring *ring;
2318         struct bcm_sysport_priv *priv;
2319         struct net_device *slave_dev;
2320         unsigned int num_tx_queues;
2321         unsigned int q, qp, port;
2322         struct net_device *dev;
2323
2324         priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2325         if (priv->netdev != info->master)
2326                 return 0;
2327
2328         dev = info->master;
2329
2330         /* We can't be setting up queue inspection for non directly attached
2331          * switches
2332          */
2333         if (info->switch_number)
2334                 return 0;
2335
2336         if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2337                 return 0;
2338
2339         port = info->port_number;
2340         slave_dev = info->info.dev;
2341
2342         /* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a
2343          * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of
2344          * per-port (slave_dev) network devices queue, we achieve just that.
2345          * This need to happen now before any slave network device is used such
2346          * it accurately reflects the number of real TX queues.
2347          */
2348         if (priv->is_lite)
2349                 netif_set_real_num_tx_queues(slave_dev,
2350                                              slave_dev->num_tx_queues / 2);
2351
2352         num_tx_queues = slave_dev->real_num_tx_queues;
2353
2354         if (priv->per_port_num_tx_queues &&
2355             priv->per_port_num_tx_queues != num_tx_queues)
2356                 netdev_warn(slave_dev, "asymmetric number of per-port queues\n");
2357
2358         priv->per_port_num_tx_queues = num_tx_queues;
2359
2360         for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues;
2361              q++) {
2362                 ring = &priv->tx_rings[q];
2363
2364                 if (ring->inspect)
2365                         continue;
2366
2367                 /* Just remember the mapping actual programming done
2368                  * during bcm_sysport_init_tx_ring
2369                  */
2370                 ring->switch_queue = qp;
2371                 ring->switch_port = port;
2372                 ring->inspect = true;
2373                 priv->ring_map[q + port * num_tx_queues] = ring;
2374                 qp++;
2375         }
2376
2377         return 0;
2378 }
2379
2380 static int bcm_sysport_unmap_queues(struct notifier_block *nb,
2381                                     struct dsa_notifier_register_info *info)
2382 {
2383         struct bcm_sysport_tx_ring *ring;
2384         struct bcm_sysport_priv *priv;
2385         struct net_device *slave_dev;
2386         unsigned int num_tx_queues;
2387         struct net_device *dev;
2388         unsigned int q, port;
2389
2390         priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2391         if (priv->netdev != info->master)
2392                 return 0;
2393
2394         dev = info->master;
2395
2396         if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2397                 return 0;
2398
2399         port = info->port_number;
2400         slave_dev = info->info.dev;
2401
2402         num_tx_queues = slave_dev->real_num_tx_queues;
2403
2404         for (q = 0; q < dev->num_tx_queues; q++) {
2405                 ring = &priv->tx_rings[q];
2406
2407                 if (ring->switch_port != port)
2408                         continue;
2409
2410                 if (!ring->inspect)
2411                         continue;
2412
2413                 ring->inspect = false;
2414                 priv->ring_map[q + port * num_tx_queues] = NULL;
2415         }
2416
2417         return 0;
2418 }
2419
2420 static int bcm_sysport_dsa_notifier(struct notifier_block *nb,
2421                                     unsigned long event, void *ptr)
2422 {
2423         int ret = NOTIFY_DONE;
2424
2425         switch (event) {
2426         case DSA_PORT_REGISTER:
2427                 ret = bcm_sysport_map_queues(nb, ptr);
2428                 break;
2429         case DSA_PORT_UNREGISTER:
2430                 ret = bcm_sysport_unmap_queues(nb, ptr);
2431                 break;
2432         }
2433
2434         return notifier_from_errno(ret);
2435 }
2436
2437 #define REV_FMT "v%2x.%02x"
2438
2439 static const struct bcm_sysport_hw_params bcm_sysport_params[] = {
2440         [SYSTEMPORT] = {
2441                 .is_lite = false,
2442                 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS,
2443         },
2444         [SYSTEMPORT_LITE] = {
2445                 .is_lite = true,
2446                 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS,
2447         },
2448 };
2449
2450 static const struct of_device_id bcm_sysport_of_match[] = {
2451         { .compatible = "brcm,systemportlite-v1.00",
2452           .data = &bcm_sysport_params[SYSTEMPORT_LITE] },
2453         { .compatible = "brcm,systemport-v1.00",
2454           .data = &bcm_sysport_params[SYSTEMPORT] },
2455         { .compatible = "brcm,systemport",
2456           .data = &bcm_sysport_params[SYSTEMPORT] },
2457         { /* sentinel */ }
2458 };
2459 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
2460
2461 static int bcm_sysport_probe(struct platform_device *pdev)
2462 {
2463         const struct bcm_sysport_hw_params *params;
2464         const struct of_device_id *of_id = NULL;
2465         struct bcm_sysport_priv *priv;
2466         struct device_node *dn;
2467         struct net_device *dev;
2468         const void *macaddr;
2469         struct resource *r;
2470         u32 txq, rxq;
2471         int ret;
2472
2473         dn = pdev->dev.of_node;
2474         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2475         of_id = of_match_node(bcm_sysport_of_match, dn);
2476         if (!of_id || !of_id->data)
2477                 return -EINVAL;
2478
2479         /* Fairly quickly we need to know the type of adapter we have */
2480         params = of_id->data;
2481
2482         /* Read the Transmit/Receive Queue properties */
2483         if (of_property_read_u32(dn, "systemport,num-txq", &txq))
2484                 txq = TDMA_NUM_RINGS;
2485         if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
2486                 rxq = 1;
2487
2488         /* Sanity check the number of transmit queues */
2489         if (!txq || txq > TDMA_NUM_RINGS)
2490                 return -EINVAL;
2491
2492         dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
2493         if (!dev)
2494                 return -ENOMEM;
2495
2496         /* Initialize private members */
2497         priv = netdev_priv(dev);
2498
2499         /* Allocate number of TX rings */
2500         priv->tx_rings = devm_kcalloc(&pdev->dev, txq,
2501                                       sizeof(struct bcm_sysport_tx_ring),
2502                                       GFP_KERNEL);
2503         if (!priv->tx_rings)
2504                 return -ENOMEM;
2505
2506         priv->is_lite = params->is_lite;
2507         priv->num_rx_desc_words = params->num_rx_desc_words;
2508
2509         priv->irq0 = platform_get_irq(pdev, 0);
2510         if (!priv->is_lite) {
2511                 priv->irq1 = platform_get_irq(pdev, 1);
2512                 priv->wol_irq = platform_get_irq(pdev, 2);
2513         } else {
2514                 priv->wol_irq = platform_get_irq(pdev, 1);
2515         }
2516         if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) {
2517                 dev_err(&pdev->dev, "invalid interrupts\n");
2518                 ret = -EINVAL;
2519                 goto err_free_netdev;
2520         }
2521
2522         priv->base = devm_ioremap_resource(&pdev->dev, r);
2523         if (IS_ERR(priv->base)) {
2524                 ret = PTR_ERR(priv->base);
2525                 goto err_free_netdev;
2526         }
2527
2528         priv->netdev = dev;
2529         priv->pdev = pdev;
2530
2531         priv->phy_interface = of_get_phy_mode(dn);
2532         /* Default to GMII interface mode */
2533         if (priv->phy_interface < 0)
2534                 priv->phy_interface = PHY_INTERFACE_MODE_GMII;
2535
2536         /* In the case of a fixed PHY, the DT node associated
2537          * to the PHY is the Ethernet MAC DT node.
2538          */
2539         if (of_phy_is_fixed_link(dn)) {
2540                 ret = of_phy_register_fixed_link(dn);
2541                 if (ret) {
2542                         dev_err(&pdev->dev, "failed to register fixed PHY\n");
2543                         goto err_free_netdev;
2544                 }
2545
2546                 priv->phy_dn = dn;
2547         }
2548
2549         /* Initialize netdevice members */
2550         macaddr = of_get_mac_address(dn);
2551         if (!macaddr || !is_valid_ether_addr(macaddr)) {
2552                 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
2553                 eth_hw_addr_random(dev);
2554         } else {
2555                 ether_addr_copy(dev->dev_addr, macaddr);
2556         }
2557
2558         SET_NETDEV_DEV(dev, &pdev->dev);
2559         dev_set_drvdata(&pdev->dev, dev);
2560         dev->ethtool_ops = &bcm_sysport_ethtool_ops;
2561         dev->netdev_ops = &bcm_sysport_netdev_ops;
2562         netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64);
2563
2564         dev->features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
2565                          NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2566         dev->hw_features |= dev->features;
2567         dev->vlan_features |= dev->features;
2568
2569         /* Request the WOL interrupt and advertise suspend if available */
2570         priv->wol_irq_disabled = 1;
2571         ret = devm_request_irq(&pdev->dev, priv->wol_irq,
2572                                bcm_sysport_wol_isr, 0, dev->name, priv);
2573         if (!ret)
2574                 device_set_wakeup_capable(&pdev->dev, 1);
2575
2576         /* Set the needed headroom once and for all */
2577         BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
2578         dev->needed_headroom += sizeof(struct bcm_tsb);
2579
2580         /* libphy will adjust the link state accordingly */
2581         netif_carrier_off(dev);
2582
2583         priv->rx_max_coalesced_frames = 1;
2584         u64_stats_init(&priv->syncp);
2585
2586         priv->dsa_notifier.notifier_call = bcm_sysport_dsa_notifier;
2587
2588         ret = register_dsa_notifier(&priv->dsa_notifier);
2589         if (ret) {
2590                 dev_err(&pdev->dev, "failed to register DSA notifier\n");
2591                 goto err_deregister_fixed_link;
2592         }
2593
2594         ret = register_netdev(dev);
2595         if (ret) {
2596                 dev_err(&pdev->dev, "failed to register net_device\n");
2597                 goto err_deregister_notifier;
2598         }
2599
2600         priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
2601         dev_info(&pdev->dev,
2602                  "Broadcom SYSTEMPORT%s" REV_FMT
2603                  " at 0x%p (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
2604                  priv->is_lite ? " Lite" : "",
2605                  (priv->rev >> 8) & 0xff, priv->rev & 0xff,
2606                  priv->base, priv->irq0, priv->irq1, txq, rxq);
2607
2608         return 0;
2609
2610 err_deregister_notifier:
2611         unregister_dsa_notifier(&priv->dsa_notifier);
2612 err_deregister_fixed_link:
2613         if (of_phy_is_fixed_link(dn))
2614                 of_phy_deregister_fixed_link(dn);
2615 err_free_netdev:
2616         free_netdev(dev);
2617         return ret;
2618 }
2619
2620 static int bcm_sysport_remove(struct platform_device *pdev)
2621 {
2622         struct net_device *dev = dev_get_drvdata(&pdev->dev);
2623         struct bcm_sysport_priv *priv = netdev_priv(dev);
2624         struct device_node *dn = pdev->dev.of_node;
2625
2626         /* Not much to do, ndo_close has been called
2627          * and we use managed allocations
2628          */
2629         unregister_dsa_notifier(&priv->dsa_notifier);
2630         unregister_netdev(dev);
2631         if (of_phy_is_fixed_link(dn))
2632                 of_phy_deregister_fixed_link(dn);
2633         free_netdev(dev);
2634         dev_set_drvdata(&pdev->dev, NULL);
2635
2636         return 0;
2637 }
2638
2639 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
2640 {
2641         struct net_device *ndev = priv->netdev;
2642         unsigned int timeout = 1000;
2643         unsigned int index, i = 0;
2644         u32 reg;
2645
2646         reg = umac_readl(priv, UMAC_MPD_CTRL);
2647         if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE))
2648                 reg |= MPD_EN;
2649         reg &= ~PSW_EN;
2650         if (priv->wolopts & WAKE_MAGICSECURE) {
2651                 /* Program the SecureOn password */
2652                 umac_writel(priv, get_unaligned_be16(&priv->sopass[0]),
2653                             UMAC_PSW_MS);
2654                 umac_writel(priv, get_unaligned_be32(&priv->sopass[2]),
2655                             UMAC_PSW_LS);
2656                 reg |= PSW_EN;
2657         }
2658         umac_writel(priv, reg, UMAC_MPD_CTRL);
2659
2660         if (priv->wolopts & WAKE_FILTER) {
2661                 /* Turn on ACPI matching to steal packets from RBUF */
2662                 reg = rbuf_readl(priv, RBUF_CONTROL);
2663                 if (priv->is_lite)
2664                         reg |= RBUF_ACPI_EN_LITE;
2665                 else
2666                         reg |= RBUF_ACPI_EN;
2667                 rbuf_writel(priv, reg, RBUF_CONTROL);
2668
2669                 /* Enable RXCHK, active filters and Broadcom tag matching */
2670                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2671                 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
2672                          RXCHK_BRCM_TAG_MATCH_SHIFT);
2673                 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2674                         reg |= BIT(RXCHK_BRCM_TAG_MATCH_SHIFT + i);
2675                         i++;
2676                 }
2677                 reg |= RXCHK_EN | RXCHK_BRCM_TAG_EN;
2678                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2679         }
2680
2681         /* Make sure RBUF entered WoL mode as result */
2682         do {
2683                 reg = rbuf_readl(priv, RBUF_STATUS);
2684                 if (reg & RBUF_WOL_MODE)
2685                         break;
2686
2687                 udelay(10);
2688         } while (timeout-- > 0);
2689
2690         /* Do not leave the UniMAC RBUF matching only MPD packets */
2691         if (!timeout) {
2692                 mpd_enable_set(priv, false);
2693                 netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
2694                 return -ETIMEDOUT;
2695         }
2696
2697         /* UniMAC receive needs to be turned on */
2698         umac_enable_set(priv, CMD_RX_EN, 1);
2699
2700         netif_dbg(priv, wol, ndev, "entered WOL mode\n");
2701
2702         return 0;
2703 }
2704
2705 static int __maybe_unused bcm_sysport_suspend(struct device *d)
2706 {
2707         struct net_device *dev = dev_get_drvdata(d);
2708         struct bcm_sysport_priv *priv = netdev_priv(dev);
2709         unsigned int i;
2710         int ret = 0;
2711         u32 reg;
2712
2713         if (!netif_running(dev))
2714                 return 0;
2715
2716         netif_device_detach(dev);
2717
2718         bcm_sysport_netif_stop(dev);
2719
2720         phy_suspend(dev->phydev);
2721
2722         /* Disable UniMAC RX */
2723         umac_enable_set(priv, CMD_RX_EN, 0);
2724
2725         ret = rdma_enable_set(priv, 0);
2726         if (ret) {
2727                 netdev_err(dev, "RDMA timeout!\n");
2728                 return ret;
2729         }
2730
2731         /* Disable RXCHK if enabled */
2732         if (priv->rx_chk_en) {
2733                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2734                 reg &= ~RXCHK_EN;
2735                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2736         }
2737
2738         /* Flush RX pipe */
2739         if (!priv->wolopts)
2740                 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
2741
2742         ret = tdma_enable_set(priv, 0);
2743         if (ret) {
2744                 netdev_err(dev, "TDMA timeout!\n");
2745                 return ret;
2746         }
2747
2748         /* Wait for a packet boundary */
2749         usleep_range(2000, 3000);
2750
2751         umac_enable_set(priv, CMD_TX_EN, 0);
2752
2753         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
2754
2755         /* Free RX/TX rings SW structures */
2756         for (i = 0; i < dev->num_tx_queues; i++)
2757                 bcm_sysport_fini_tx_ring(priv, i);
2758         bcm_sysport_fini_rx_ring(priv);
2759
2760         /* Get prepared for Wake-on-LAN */
2761         if (device_may_wakeup(d) && priv->wolopts)
2762                 ret = bcm_sysport_suspend_to_wol(priv);
2763
2764         return ret;
2765 }
2766
2767 static int __maybe_unused bcm_sysport_resume(struct device *d)
2768 {
2769         struct net_device *dev = dev_get_drvdata(d);
2770         struct bcm_sysport_priv *priv = netdev_priv(dev);
2771         unsigned int i;
2772         int ret;
2773
2774         if (!netif_running(dev))
2775                 return 0;
2776
2777         umac_reset(priv);
2778
2779         /* We may have been suspended and never received a WOL event that
2780          * would turn off MPD detection, take care of that now
2781          */
2782         bcm_sysport_resume_from_wol(priv);
2783
2784         /* Initialize both hardware and software ring */
2785         for (i = 0; i < dev->num_tx_queues; i++) {
2786                 ret = bcm_sysport_init_tx_ring(priv, i);
2787                 if (ret) {
2788                         netdev_err(dev, "failed to initialize TX ring %d\n",
2789                                    i);
2790                         goto out_free_tx_rings;
2791                 }
2792         }
2793
2794         /* Initialize linked-list */
2795         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2796
2797         /* Initialize RX ring */
2798         ret = bcm_sysport_init_rx_ring(priv);
2799         if (ret) {
2800                 netdev_err(dev, "failed to initialize RX ring\n");
2801                 goto out_free_rx_ring;
2802         }
2803
2804         /* RX pipe enable */
2805         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2806
2807         ret = rdma_enable_set(priv, 1);
2808         if (ret) {
2809                 netdev_err(dev, "failed to enable RDMA\n");
2810                 goto out_free_rx_ring;
2811         }
2812
2813         /* Restore enabled features */
2814         bcm_sysport_set_features(dev, dev->features);
2815
2816         rbuf_init(priv);
2817
2818         /* Set maximum frame length */
2819         if (!priv->is_lite)
2820                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2821         else
2822                 gib_set_pad_extension(priv);
2823
2824         /* Set MAC address */
2825         umac_set_hw_addr(priv, dev->dev_addr);
2826
2827         umac_enable_set(priv, CMD_RX_EN, 1);
2828
2829         /* TX pipe enable */
2830         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2831
2832         umac_enable_set(priv, CMD_TX_EN, 1);
2833
2834         ret = tdma_enable_set(priv, 1);
2835         if (ret) {
2836                 netdev_err(dev, "TDMA timeout!\n");
2837                 goto out_free_rx_ring;
2838         }
2839
2840         phy_resume(dev->phydev);
2841
2842         bcm_sysport_netif_start(dev);
2843
2844         netif_device_attach(dev);
2845
2846         return 0;
2847
2848 out_free_rx_ring:
2849         bcm_sysport_fini_rx_ring(priv);
2850 out_free_tx_rings:
2851         for (i = 0; i < dev->num_tx_queues; i++)
2852                 bcm_sysport_fini_tx_ring(priv, i);
2853         return ret;
2854 }
2855
2856 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2857                 bcm_sysport_suspend, bcm_sysport_resume);
2858
2859 static struct platform_driver bcm_sysport_driver = {
2860         .probe  = bcm_sysport_probe,
2861         .remove = bcm_sysport_remove,
2862         .driver =  {
2863                 .name = "brcm-systemport",
2864                 .of_match_table = bcm_sysport_of_match,
2865                 .pm = &bcm_sysport_pm_ops,
2866         },
2867 };
2868 module_platform_driver(bcm_sysport_driver);
2869
2870 MODULE_AUTHOR("Broadcom Corporation");
2871 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2872 MODULE_ALIAS("platform:brcm-systemport");
2873 MODULE_LICENSE("GPL");