drivers/net/ethernet/broadcom/bcmsysport.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Broadcom BCM7xxx System Port Ethernet MAC driver
   4  *
   5  * Copyright (C) 2014 Broadcom Corporation
   6  */
   7
   8 #define pr_fmt(fmt)     KBUILD_MODNAME ": " fmt
   9
  10 #include <linux/init.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/dsa/brcm.h>
  16 #include <linux/etherdevice.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/of.h>
  19 #include <linux/of_net.h>
  20 #include <linux/of_mdio.h>
  21 #include <linux/phy.h>
  22 #include <linux/phy_fixed.h>
  23 #include <net/dsa.h>
  24 #include <linux/clk.h>
  25 #include <net/ip.h>
  26 #include <net/ipv6.h>
  27
  28 #include "bcmsysport.h"
  29
  30 /* I/O accessors register helpers */
  31 #define BCM_SYSPORT_IO_MACRO(name, offset) \
  32 static inline u32 name##_readl(struct bcm_sysport_priv *priv, u32 off)  \
  33 {                                                                       \
  34         u32 reg = readl_relaxed(priv->base + offset + off);             \
  35         return reg;                                                     \
  36 }                                                                       \
  37 static inline void name##_writel(struct bcm_sysport_priv *priv,         \
  38                                   u32 val, u32 off)                     \
  39 {                                                                       \
  40         writel_relaxed(val, priv->base + offset + off);                 \
  41 }                                                                       \
  42
  43 BCM_SYSPORT_IO_MACRO(intrl2_0, SYS_PORT_INTRL2_0_OFFSET);
  44 BCM_SYSPORT_IO_MACRO(intrl2_1, SYS_PORT_INTRL2_1_OFFSET);
  45 BCM_SYSPORT_IO_MACRO(umac, SYS_PORT_UMAC_OFFSET);
  46 BCM_SYSPORT_IO_MACRO(gib, SYS_PORT_GIB_OFFSET);
  47 BCM_SYSPORT_IO_MACRO(tdma, SYS_PORT_TDMA_OFFSET);
  48 BCM_SYSPORT_IO_MACRO(rxchk, SYS_PORT_RXCHK_OFFSET);
  49 BCM_SYSPORT_IO_MACRO(txchk, SYS_PORT_TXCHK_OFFSET);
  50 BCM_SYSPORT_IO_MACRO(rbuf, SYS_PORT_RBUF_OFFSET);
  51 BCM_SYSPORT_IO_MACRO(tbuf, SYS_PORT_TBUF_OFFSET);
  52 BCM_SYSPORT_IO_MACRO(topctrl, SYS_PORT_TOPCTRL_OFFSET);
  53
  54 /* On SYSTEMPORT Lite, any register after RDMA_STATUS has the exact
  55  * same layout, except it has been moved by 4 bytes up, *sigh*
  56  */
  57 static inline u32 rdma_readl(struct bcm_sysport_priv *priv, u32 off)
  58 {
  59         if (priv->is_lite && off >= RDMA_STATUS)
  60                 off += 4;
  61         return readl_relaxed(priv->base + SYS_PORT_RDMA_OFFSET + off);
  62 }
  63
  64 static inline void rdma_writel(struct bcm_sysport_priv *priv, u32 val, u32 off)
  65 {
  66         if (priv->is_lite && off >= RDMA_STATUS)
  67                 off += 4;
  68         writel_relaxed(val, priv->base + SYS_PORT_RDMA_OFFSET + off);
  69 }
  70
  71 static inline u32 tdma_control_bit(struct bcm_sysport_priv *priv, u32 bit)
  72 {
  73         if (!priv->is_lite) {
  74                 return BIT(bit);
  75         } else {
  76                 if (bit >= ACB_ALGO)
  77                         return BIT(bit + 1);
  78                 else
  79                         return BIT(bit);
  80         }
  81 }
  82
  83 /* L2-interrupt masking/unmasking helpers, does automatic saving of the applied
  84  * mask in a software copy to avoid CPU_MASK_STATUS reads in hot-paths.
  85   */
  86 #define BCM_SYSPORT_INTR_L2(which)      \
  87 static inline void intrl2_##which##_mask_clear(struct bcm_sysport_priv *priv, \
  88                                                 u32 mask)               \
  89 {                                                                       \
  90         priv->irq##which##_mask &= ~(mask);                             \
  91         intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR);     \
  92 }                                                                       \
  93 static inline void intrl2_##which##_mask_set(struct bcm_sysport_priv *priv, \
  94                                                 u32 mask)               \
  95 {                                                                       \
  96         intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET);      \
  97         priv->irq##which##_mask |= (mask);                              \
  98 }                                                                       \
  99
 100 BCM_SYSPORT_INTR_L2(0)
 101 BCM_SYSPORT_INTR_L2(1)
 102
 103 /* Register accesses to GISB/RBUS registers are expensive (few hundred
 104  * nanoseconds), so keep the check for 64-bits explicit here to save
 105  * one register write per-packet on 32-bits platforms.
 106  */
 107 static inline void dma_desc_set_addr(struct bcm_sysport_priv *priv,
 108                                      void __iomem *d,
 109                                      dma_addr_t addr)
 110 {
 111 #ifdef CONFIG_PHYS_ADDR_T_64BIT
 112         writel_relaxed(upper_32_bits(addr) & DESC_ADDR_HI_MASK,
 113                      d + DESC_ADDR_HI_STATUS_LEN);
 114 #endif
 115         writel_relaxed(lower_32_bits(addr), d + DESC_ADDR_LO);
 116 }
 117
 118 /* Ethtool operations */
 119 static void bcm_sysport_set_rx_csum(struct net_device *dev,
 120                                     netdev_features_t wanted)
 121 {
 122         struct bcm_sysport_priv *priv = netdev_priv(dev);
 123         u32 reg;
 124
 125         priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM);
 126         reg = rxchk_readl(priv, RXCHK_CONTROL);
 127         /* Clear L2 header checks, which would prevent BPDUs
 128          * from being received.
 129          */
 130         reg &= ~RXCHK_L2_HDR_DIS;
 131         if (priv->rx_chk_en)
 132                 reg |= RXCHK_EN;
 133         else
 134                 reg &= ~RXCHK_EN;
 135
 136         /* If UniMAC forwards CRC, we need to skip over it to get
 137          * a valid CHK bit to be set in the per-packet status word
 138          */
 139         if (priv->rx_chk_en && priv->crc_fwd)
 140                 reg |= RXCHK_SKIP_FCS;
 141         else
 142                 reg &= ~RXCHK_SKIP_FCS;
 143
 144         /* If Broadcom tags are enabled (e.g: using a switch), make
 145          * sure we tell the RXCHK hardware to expect a 4-bytes Broadcom
 146          * tag after the Ethernet MAC Source Address.
 147          */
 148         if (netdev_uses_dsa(dev))
 149                 reg |= RXCHK_BRCM_TAG_EN;
 150         else
 151                 reg &= ~RXCHK_BRCM_TAG_EN;
 152
 153         rxchk_writel(priv, reg, RXCHK_CONTROL);
 154 }
 155
 156 static void bcm_sysport_set_tx_csum(struct net_device *dev,
 157                                     netdev_features_t wanted)
 158 {
 159         struct bcm_sysport_priv *priv = netdev_priv(dev);
 160         u32 reg;
 161
 162         /* Hardware transmit checksum requires us to enable the Transmit status
 163          * block prepended to the packet contents
 164          */
 165         priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
 166                                     NETIF_F_HW_VLAN_CTAG_TX));
 167         reg = tdma_readl(priv, TDMA_CONTROL);
 168         if (priv->tsb_en)
 169                 reg |= tdma_control_bit(priv, TSB_EN);
 170         else
 171                 reg &= ~tdma_control_bit(priv, TSB_EN);
 172         /* Indicating that software inserts Broadcom tags is needed for the TX
 173          * checksum to be computed correctly when using VLAN HW acceleration,
 174          * else it has no effect, so it can always be turned on.
 175          */
 176         if (netdev_uses_dsa(dev))
 177                 reg |= tdma_control_bit(priv, SW_BRCM_TAG);
 178         else
 179                 reg &= ~tdma_control_bit(priv, SW_BRCM_TAG);
 180         tdma_writel(priv, reg, TDMA_CONTROL);
 181
 182         /* Default TPID is ETH_P_8021AD, change to ETH_P_8021Q */
 183         if (wanted & NETIF_F_HW_VLAN_CTAG_TX)
 184                 tdma_writel(priv, ETH_P_8021Q, TDMA_TPID);
 185 }
 186
 187 static int bcm_sysport_set_features(struct net_device *dev,
 188                                     netdev_features_t features)
 189 {
 190         struct bcm_sysport_priv *priv = netdev_priv(dev);
 191         int ret;
 192
 193         ret = clk_prepare_enable(priv->clk);
 194         if (ret)
 195                 return ret;
 196
 197         /* Read CRC forward */
 198         if (!priv->is_lite)
 199                 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
 200         else
 201                 priv->crc_fwd = !((gib_readl(priv, GIB_CONTROL) &
 202                                   GIB_FCS_STRIP) >> GIB_FCS_STRIP_SHIFT);
 203
 204         bcm_sysport_set_rx_csum(dev, features);
 205         bcm_sysport_set_tx_csum(dev, features);
 206
 207         clk_disable_unprepare(priv->clk);
 208
 209         return 0;
 210 }
 211
 212 /* Hardware counters must be kept in sync because the order/offset
 213  * is important here (order in structure declaration = order in hardware)
 214  */
 215 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = {
 216         /* general stats */
 217         STAT_NETDEV64(rx_packets),
 218         STAT_NETDEV64(tx_packets),
 219         STAT_NETDEV64(rx_bytes),
 220         STAT_NETDEV64(tx_bytes),
 221         STAT_NETDEV(rx_errors),
 222         STAT_NETDEV(tx_errors),
 223         STAT_NETDEV(rx_dropped),
 224         STAT_NETDEV(tx_dropped),
 225         STAT_NETDEV(multicast),
 226         /* UniMAC RSV counters */
 227         STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
 228         STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
 229         STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
 230         STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
 231         STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
 232         STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
 233         STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
 234         STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
 235         STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
 236         STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
 237         STAT_MIB_RX("rx_pkts", mib.rx.pkt),
 238         STAT_MIB_RX("rx_bytes", mib.rx.bytes),
 239         STAT_MIB_RX("rx_multicast", mib.rx.mca),
 240         STAT_MIB_RX("rx_broadcast", mib.rx.bca),
 241         STAT_MIB_RX("rx_fcs", mib.rx.fcs),
 242         STAT_MIB_RX("rx_control", mib.rx.cf),
 243         STAT_MIB_RX("rx_pause", mib.rx.pf),
 244         STAT_MIB_RX("rx_unknown", mib.rx.uo),
 245         STAT_MIB_RX("rx_align", mib.rx.aln),
 246         STAT_MIB_RX("rx_outrange", mib.rx.flr),
 247         STAT_MIB_RX("rx_code", mib.rx.cde),
 248         STAT_MIB_RX("rx_carrier", mib.rx.fcr),
 249         STAT_MIB_RX("rx_oversize", mib.rx.ovr),
 250         STAT_MIB_RX("rx_jabber", mib.rx.jbr),
 251         STAT_MIB_RX("rx_mtu_err", mib.rx.mtue),
 252         STAT_MIB_RX("rx_good_pkts", mib.rx.pok),
 253         STAT_MIB_RX("rx_unicast", mib.rx.uc),
 254         STAT_MIB_RX("rx_ppp", mib.rx.ppp),
 255         STAT_MIB_RX("rx_crc", mib.rx.rcrc),
 256         /* UniMAC TSV counters */
 257         STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
 258         STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
 259         STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
 260         STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
 261         STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
 262         STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
 263         STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
 264         STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
 265         STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
 266         STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
 267         STAT_MIB_TX("tx_pkts", mib.tx.pkts),
 268         STAT_MIB_TX("tx_multicast", mib.tx.mca),
 269         STAT_MIB_TX("tx_broadcast", mib.tx.bca),
 270         STAT_MIB_TX("tx_pause", mib.tx.pf),
 271         STAT_MIB_TX("tx_control", mib.tx.cf),
 272         STAT_MIB_TX("tx_fcs_err", mib.tx.fcs),
 273         STAT_MIB_TX("tx_oversize", mib.tx.ovr),
 274         STAT_MIB_TX("tx_defer", mib.tx.drf),
 275         STAT_MIB_TX("tx_excess_defer", mib.tx.edf),
 276         STAT_MIB_TX("tx_single_col", mib.tx.scl),
 277         STAT_MIB_TX("tx_multi_col", mib.tx.mcl),
 278         STAT_MIB_TX("tx_late_col", mib.tx.lcl),
 279         STAT_MIB_TX("tx_excess_col", mib.tx.ecl),
 280         STAT_MIB_TX("tx_frags", mib.tx.frg),
 281         STAT_MIB_TX("tx_total_col", mib.tx.ncl),
 282         STAT_MIB_TX("tx_jabber", mib.tx.jbr),
 283         STAT_MIB_TX("tx_bytes", mib.tx.bytes),
 284         STAT_MIB_TX("tx_good_pkts", mib.tx.pok),
 285         STAT_MIB_TX("tx_unicast", mib.tx.uc),
 286         /* UniMAC RUNT counters */
 287         STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
 288         STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
 289         STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
 290         STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
 291         /* RXCHK misc statistics */
 292         STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR),
 293         STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc,
 294                    RXCHK_OTHER_DISC_CNTR),
 295         /* RBUF misc statistics */
 296         STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR),
 297         STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR),
 298         STAT_MIB_SOFT("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
 299         STAT_MIB_SOFT("rx_dma_failed", mib.rx_dma_failed),
 300         STAT_MIB_SOFT("tx_dma_failed", mib.tx_dma_failed),
 301         STAT_MIB_SOFT("tx_realloc_tsb", mib.tx_realloc_tsb),
 302         STAT_MIB_SOFT("tx_realloc_tsb_failed", mib.tx_realloc_tsb_failed),
 303         /* Per TX-queue statistics are dynamically appended */
 304 };
 305
 306 #define BCM_SYSPORT_STATS_LEN   ARRAY_SIZE(bcm_sysport_gstrings_stats)
 307
 308 static void bcm_sysport_get_drvinfo(struct net_device *dev,
 309                                     struct ethtool_drvinfo *info)
 310 {
 311         strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
 312         strlcpy(info->bus_info, "platform", sizeof(info->bus_info));
 313 }
 314
 315 static u32 bcm_sysport_get_msglvl(struct net_device *dev)
 316 {
 317         struct bcm_sysport_priv *priv = netdev_priv(dev);
 318
 319         return priv->msg_enable;
 320 }
 321
 322 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
 323 {
 324         struct bcm_sysport_priv *priv = netdev_priv(dev);
 325
 326         priv->msg_enable = enable;
 327 }
 328
 329 static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type)
 330 {
 331         switch (type) {
 332         case BCM_SYSPORT_STAT_NETDEV:
 333         case BCM_SYSPORT_STAT_NETDEV64:
 334         case BCM_SYSPORT_STAT_RXCHK:
 335         case BCM_SYSPORT_STAT_RBUF:
 336         case BCM_SYSPORT_STAT_SOFT:
 337                 return true;
 338         default:
 339                 return false;
 340         }
 341 }
 342
 343 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set)
 344 {
 345         struct bcm_sysport_priv *priv = netdev_priv(dev);
 346         const struct bcm_sysport_stats *s;
 347         unsigned int i, j;
 348
 349         switch (string_set) {
 350         case ETH_SS_STATS:
 351                 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 352                         s = &bcm_sysport_gstrings_stats[i];
 353                         if (priv->is_lite &&
 354                             !bcm_sysport_lite_stat_valid(s->type))
 355                                 continue;
 356                         j++;
 357                 }
 358                 /* Include per-queue statistics */
 359                 return j + dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
 360         default:
 361                 return -EOPNOTSUPP;
 362         }
 363 }
 364
 365 static void bcm_sysport_get_strings(struct net_device *dev,
 366                                     u32 stringset, u8 *data)
 367 {
 368         struct bcm_sysport_priv *priv = netdev_priv(dev);
 369         const struct bcm_sysport_stats *s;
 370         char buf[128];
 371         int i, j;
 372
 373         switch (stringset) {
 374         case ETH_SS_STATS:
 375                 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 376                         s = &bcm_sysport_gstrings_stats[i];
 377                         if (priv->is_lite &&
 378                             !bcm_sysport_lite_stat_valid(s->type))
 379                                 continue;
 380
 381                         memcpy(data + j * ETH_GSTRING_LEN, s->stat_string,
 382                                ETH_GSTRING_LEN);
 383                         j++;
 384                 }
 385
 386                 for (i = 0; i < dev->num_tx_queues; i++) {
 387                         snprintf(buf, sizeof(buf), "txq%d_packets", i);
 388                         memcpy(data + j * ETH_GSTRING_LEN, buf,
 389                                ETH_GSTRING_LEN);
 390                         j++;
 391
 392                         snprintf(buf, sizeof(buf), "txq%d_bytes", i);
 393                         memcpy(data + j * ETH_GSTRING_LEN, buf,
 394                                ETH_GSTRING_LEN);
 395                         j++;
 396                 }
 397                 break;
 398         default:
 399                 break;
 400         }
 401 }
 402
 403 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
 404 {
 405         int i, j = 0;
 406
 407         for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 408                 const struct bcm_sysport_stats *s;
 409                 u8 offset = 0;
 410                 u32 val = 0;
 411                 char *p;
 412
 413                 s = &bcm_sysport_gstrings_stats[i];
 414                 switch (s->type) {
 415                 case BCM_SYSPORT_STAT_NETDEV:
 416                 case BCM_SYSPORT_STAT_NETDEV64:
 417                 case BCM_SYSPORT_STAT_SOFT:
 418                         continue;
 419                 case BCM_SYSPORT_STAT_MIB_RX:
 420                 case BCM_SYSPORT_STAT_MIB_TX:
 421                 case BCM_SYSPORT_STAT_RUNT:
 422                         if (priv->is_lite)
 423                                 continue;
 424
 425                         if (s->type != BCM_SYSPORT_STAT_MIB_RX)
 426                                 offset = UMAC_MIB_STAT_OFFSET;
 427                         val = umac_readl(priv, UMAC_MIB_START + j + offset);
 428                         break;
 429                 case BCM_SYSPORT_STAT_RXCHK:
 430                         val = rxchk_readl(priv, s->reg_offset);
 431                         if (val == ~0)
 432                                 rxchk_writel(priv, 0, s->reg_offset);
 433                         break;
 434                 case BCM_SYSPORT_STAT_RBUF:
 435                         val = rbuf_readl(priv, s->reg_offset);
 436                         if (val == ~0)
 437                                 rbuf_writel(priv, 0, s->reg_offset);
 438                         break;
 439                 }
 440
 441                 j += s->stat_sizeof;
 442                 p = (char *)priv + s->stat_offset;
 443                 *(u32 *)p = val;
 444         }
 445
 446         netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
 447 }
 448
 449 static void bcm_sysport_update_tx_stats(struct bcm_sysport_priv *priv,
 450                                         u64 *tx_bytes, u64 *tx_packets)
 451 {
 452         struct bcm_sysport_tx_ring *ring;
 453         u64 bytes = 0, packets = 0;
 454         unsigned int start;
 455         unsigned int q;
 456
 457         for (q = 0; q < priv->netdev->num_tx_queues; q++) {
 458                 ring = &priv->tx_rings[q];
 459                 do {
 460                         start = u64_stats_fetch_begin_irq(&priv->syncp);
 461                         bytes = ring->bytes;
 462                         packets = ring->packets;
 463                 } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
 464
 465                 *tx_bytes += bytes;
 466                 *tx_packets += packets;
 467         }
 468 }
 469
 470 static void bcm_sysport_get_stats(struct net_device *dev,
 471                                   struct ethtool_stats *stats, u64 *data)
 472 {
 473         struct bcm_sysport_priv *priv = netdev_priv(dev);
 474         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
 475         struct u64_stats_sync *syncp = &priv->syncp;
 476         struct bcm_sysport_tx_ring *ring;
 477         u64 tx_bytes = 0, tx_packets = 0;
 478         unsigned int start;
 479         int i, j;
 480
 481         if (netif_running(dev)) {
 482                 bcm_sysport_update_mib_counters(priv);
 483                 bcm_sysport_update_tx_stats(priv, &tx_bytes, &tx_packets);
 484                 stats64->tx_bytes = tx_bytes;
 485                 stats64->tx_packets = tx_packets;
 486         }
 487
 488         for (i =  0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 489                 const struct bcm_sysport_stats *s;
 490                 char *p;
 491
 492                 s = &bcm_sysport_gstrings_stats[i];
 493                 if (s->type == BCM_SYSPORT_STAT_NETDEV)
 494                         p = (char *)&dev->stats;
 495                 else if (s->type == BCM_SYSPORT_STAT_NETDEV64)
 496                         p = (char *)stats64;
 497                 else
 498                         p = (char *)priv;
 499
 500                 if (priv->is_lite && !bcm_sysport_lite_stat_valid(s->type))
 501                         continue;
 502                 p += s->stat_offset;
 503
 504                 if (s->stat_sizeof == sizeof(u64) &&
 505                     s->type == BCM_SYSPORT_STAT_NETDEV64) {
 506                         do {
 507                                 start = u64_stats_fetch_begin_irq(syncp);
 508                                 data[i] = *(u64 *)p;
 509                         } while (u64_stats_fetch_retry_irq(syncp, start));
 510                 } else
 511                         data[i] = *(u32 *)p;
 512                 j++;
 513         }
 514
 515         /* For SYSTEMPORT Lite since we have holes in our statistics, j would
 516          * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it
 517          * needs to point to how many total statistics we have minus the
 518          * number of per TX queue statistics
 519          */
 520         j = bcm_sysport_get_sset_count(dev, ETH_SS_STATS) -
 521             dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
 522
 523         for (i = 0; i < dev->num_tx_queues; i++) {
 524                 ring = &priv->tx_rings[i];
 525                 data[j] = ring->packets;
 526                 j++;
 527                 data[j] = ring->bytes;
 528                 j++;
 529         }
 530 }
 531
 532 static void bcm_sysport_get_wol(struct net_device *dev,
 533                                 struct ethtool_wolinfo *wol)
 534 {
 535         struct bcm_sysport_priv *priv = netdev_priv(dev);
 536
 537         wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
 538         wol->wolopts = priv->wolopts;
 539
 540         if (!(priv->wolopts & WAKE_MAGICSECURE))
 541                 return;
 542
 543         memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass));
 544 }
 545
 546 static int bcm_sysport_set_wol(struct net_device *dev,
 547                                struct ethtool_wolinfo *wol)
 548 {
 549         struct bcm_sysport_priv *priv = netdev_priv(dev);
 550         struct device *kdev = &priv->pdev->dev;
 551         u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
 552
 553         if (!device_can_wakeup(kdev))
 554                 return -ENOTSUPP;
 555
 556         if (wol->wolopts & ~supported)
 557                 return -EINVAL;
 558
 559         if (wol->wolopts & WAKE_MAGICSECURE)
 560                 memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass));
 561
 562         /* Flag the device and relevant IRQ as wakeup capable */
 563         if (wol->wolopts) {
 564                 device_set_wakeup_enable(kdev, 1);
 565                 if (priv->wol_irq_disabled)
 566                         enable_irq_wake(priv->wol_irq);
 567                 priv->wol_irq_disabled = 0;
 568         } else {
 569                 device_set_wakeup_enable(kdev, 0);
 570                 /* Avoid unbalanced disable_irq_wake calls */
 571                 if (!priv->wol_irq_disabled)
 572                         disable_irq_wake(priv->wol_irq);
 573                 priv->wol_irq_disabled = 1;
 574         }
 575
 576         priv->wolopts = wol->wolopts;
 577
 578         return 0;
 579 }
 580
 581 static void bcm_sysport_set_rx_coalesce(struct bcm_sysport_priv *priv,
 582                                         u32 usecs, u32 pkts)
 583 {
 584         u32 reg;
 585
 586         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 587         reg &= ~(RDMA_INTR_THRESH_MASK |
 588                  RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT);
 589         reg |= pkts;
 590         reg |= DIV_ROUND_UP(usecs * 1000, 8192) << RDMA_TIMEOUT_SHIFT;
 591         rdma_writel(priv, reg, RDMA_MBDONE_INTR);
 592 }
 593
 594 static void bcm_sysport_set_tx_coalesce(struct bcm_sysport_tx_ring *ring,
 595                                         struct ethtool_coalesce *ec)
 596 {
 597         struct bcm_sysport_priv *priv = ring->priv;
 598         u32 reg;
 599
 600         reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(ring->index));
 601         reg &= ~(RING_INTR_THRESH_MASK |
 602                  RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT);
 603         reg |= ec->tx_max_coalesced_frames;
 604         reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) <<
 605                             RING_TIMEOUT_SHIFT;
 606         tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(ring->index));
 607 }
 608
 609 static int bcm_sysport_get_coalesce(struct net_device *dev,
 610                                     struct ethtool_coalesce *ec)
 611 {
 612         struct bcm_sysport_priv *priv = netdev_priv(dev);
 613         u32 reg;
 614
 615         reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0));
 616
 617         ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000;
 618         ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK;
 619
 620         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 621
 622         ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000;
 623         ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK;
 624         ec->use_adaptive_rx_coalesce = priv->dim.use_dim;
 625
 626         return 0;
 627 }
 628
 629 static int bcm_sysport_set_coalesce(struct net_device *dev,
 630                                     struct ethtool_coalesce *ec)
 631 {
 632         struct bcm_sysport_priv *priv = netdev_priv(dev);
 633         struct dim_cq_moder moder;
 634         u32 usecs, pkts;
 635         unsigned int i;
 636
 637         /* Base system clock is 125Mhz, DMA timeout is this reference clock
 638          * divided by 1024, which yield roughly 8.192 us, our maximum value has
 639          * to fit in the RING_TIMEOUT_MASK (16 bits).
 640          */
 641         if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
 642             ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
 643             ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
 644             ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
 645                 return -EINVAL;
 646
 647         if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
 648             (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0))
 649                 return -EINVAL;
 650
 651         for (i = 0; i < dev->num_tx_queues; i++)
 652                 bcm_sysport_set_tx_coalesce(&priv->tx_rings[i], ec);
 653
 654         priv->rx_coalesce_usecs = ec->rx_coalesce_usecs;
 655         priv->rx_max_coalesced_frames = ec->rx_max_coalesced_frames;
 656         usecs = priv->rx_coalesce_usecs;
 657         pkts = priv->rx_max_coalesced_frames;
 658
 659         if (ec->use_adaptive_rx_coalesce && !priv->dim.use_dim) {
 660                 moder = net_dim_get_def_rx_moderation(priv->dim.dim.mode);
 661                 usecs = moder.usec;
 662                 pkts = moder.pkts;
 663         }
 664
 665         priv->dim.use_dim = ec->use_adaptive_rx_coalesce;
 666
 667         /* Apply desired coalescing parameters */
 668         bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
 669
 670         return 0;
 671 }
 672
 673 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
 674 {
 675         dev_consume_skb_any(cb->skb);
 676         cb->skb = NULL;
 677         dma_unmap_addr_set(cb, dma_addr, 0);
 678 }
 679
 680 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
 681                                              struct bcm_sysport_cb *cb)
 682 {
 683         struct device *kdev = &priv->pdev->dev;
 684         struct net_device *ndev = priv->netdev;
 685         struct sk_buff *skb, *rx_skb;
 686         dma_addr_t mapping;
 687
 688         /* Allocate a new SKB for a new packet */
 689         skb = __netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH,
 690                                  GFP_ATOMIC | __GFP_NOWARN);
 691         if (!skb) {
 692                 priv->mib.alloc_rx_buff_failed++;
 693                 netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
 694                 return NULL;
 695         }
 696
 697         mapping = dma_map_single(kdev, skb->data,
 698                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 699         if (dma_mapping_error(kdev, mapping)) {
 700                 priv->mib.rx_dma_failed++;
 701                 dev_kfree_skb_any(skb);
 702                 netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
 703                 return NULL;
 704         }
 705
 706         /* Grab the current SKB on the ring */
 707         rx_skb = cb->skb;
 708         if (likely(rx_skb))
 709                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 710                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 711
 712         /* Put the new SKB on the ring */
 713         cb->skb = skb;
 714         dma_unmap_addr_set(cb, dma_addr, mapping);
 715         dma_desc_set_addr(priv, cb->bd_addr, mapping);
 716
 717         netif_dbg(priv, rx_status, ndev, "RX refill\n");
 718
 719         /* Return the current SKB to the caller */
 720         return rx_skb;
 721 }
 722
 723 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
 724 {
 725         struct bcm_sysport_cb *cb;
 726         struct sk_buff *skb;
 727         unsigned int i;
 728
 729         for (i = 0; i < priv->num_rx_bds; i++) {
 730                 cb = &priv->rx_cbs[i];
 731                 skb = bcm_sysport_rx_refill(priv, cb);
 732                 dev_kfree_skb(skb);
 733                 if (!cb->skb)
 734                         return -ENOMEM;
 735         }
 736
 737         return 0;
 738 }
 739
 740 /* Poll the hardware for up to budget packets to process */
 741 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
 742                                         unsigned int budget)
 743 {
 744         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
 745         struct net_device *ndev = priv->netdev;
 746         unsigned int processed = 0, to_process;
 747         unsigned int processed_bytes = 0;
 748         struct bcm_sysport_cb *cb;
 749         struct sk_buff *skb;
 750         unsigned int p_index;
 751         u16 len, status;
 752         struct bcm_rsb *rsb;
 753
 754         /* Clear status before servicing to reduce spurious interrupts */
 755         intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR);
 756
 757         /* Determine how much we should process since last call, SYSTEMPORT Lite
 758          * groups the producer and consumer indexes into the same 32-bit
 759          * which we access using RDMA_CONS_INDEX
 760          */
 761         if (!priv->is_lite)
 762                 p_index = rdma_readl(priv, RDMA_PROD_INDEX);
 763         else
 764                 p_index = rdma_readl(priv, RDMA_CONS_INDEX);
 765         p_index &= RDMA_PROD_INDEX_MASK;
 766
 767         to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK;
 768
 769         netif_dbg(priv, rx_status, ndev,
 770                   "p_index=%d rx_c_index=%d to_process=%d\n",
 771                   p_index, priv->rx_c_index, to_process);
 772
 773         while ((processed < to_process) && (processed < budget)) {
 774                 cb = &priv->rx_cbs[priv->rx_read_ptr];
 775                 skb = bcm_sysport_rx_refill(priv, cb);
 776
 777
 778                 /* We do not have a backing SKB, so we do not a corresponding
 779                  * DMA mapping for this incoming packet since
 780                  * bcm_sysport_rx_refill always either has both skb and mapping
 781                  * or none.
 782                  */
 783                 if (unlikely(!skb)) {
 784                         netif_err(priv, rx_err, ndev, "out of memory!\n");
 785                         ndev->stats.rx_dropped++;
 786                         ndev->stats.rx_errors++;
 787                         goto next;
 788                 }
 789
 790                 /* Extract the Receive Status Block prepended */
 791                 rsb = (struct bcm_rsb *)skb->data;
 792                 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
 793                 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
 794                           DESC_STATUS_MASK;
 795
 796                 netif_dbg(priv, rx_status, ndev,
 797                           "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
 798                           p_index, priv->rx_c_index, priv->rx_read_ptr,
 799                           len, status);
 800
 801                 if (unlikely(len > RX_BUF_LENGTH)) {
 802                         netif_err(priv, rx_status, ndev, "oversized packet\n");
 803                         ndev->stats.rx_length_errors++;
 804                         ndev->stats.rx_errors++;
 805                         dev_kfree_skb_any(skb);
 806                         goto next;
 807                 }
 808
 809                 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
 810                         netif_err(priv, rx_status, ndev, "fragmented packet!\n");
 811                         ndev->stats.rx_dropped++;
 812                         ndev->stats.rx_errors++;
 813                         dev_kfree_skb_any(skb);
 814                         goto next;
 815                 }
 816
 817                 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
 818                         netif_err(priv, rx_err, ndev, "error packet\n");
 819                         if (status & RX_STATUS_OVFLOW)
 820                                 ndev->stats.rx_over_errors++;
 821                         ndev->stats.rx_dropped++;
 822                         ndev->stats.rx_errors++;
 823                         dev_kfree_skb_any(skb);
 824                         goto next;
 825                 }
 826
 827                 skb_put(skb, len);
 828
 829                 /* Hardware validated our checksum */
 830                 if (likely(status & DESC_L4_CSUM))
 831                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 832
 833                 /* Hardware pre-pends packets with 2bytes before Ethernet
 834                  * header plus we have the Receive Status Block, strip off all
 835                  * of this from the SKB.
 836                  */
 837                 skb_pull(skb, sizeof(*rsb) + 2);
 838                 len -= (sizeof(*rsb) + 2);
 839                 processed_bytes += len;
 840
 841                 /* UniMAC may forward CRC */
 842                 if (priv->crc_fwd) {
 843                         skb_trim(skb, len - ETH_FCS_LEN);
 844                         len -= ETH_FCS_LEN;
 845                 }
 846
 847                 skb->protocol = eth_type_trans(skb, ndev);
 848                 ndev->stats.rx_packets++;
 849                 ndev->stats.rx_bytes += len;
 850                 u64_stats_update_begin(&priv->syncp);
 851                 stats64->rx_packets++;
 852                 stats64->rx_bytes += len;
 853                 u64_stats_update_end(&priv->syncp);
 854
 855                 napi_gro_receive(&priv->napi, skb);
 856 next:
 857                 processed++;
 858                 priv->rx_read_ptr++;
 859
 860                 if (priv->rx_read_ptr == priv->num_rx_bds)
 861                         priv->rx_read_ptr = 0;
 862         }
 863
 864         priv->dim.packets = processed;
 865         priv->dim.bytes = processed_bytes;
 866
 867         return processed;
 868 }
 869
 870 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring,
 871                                        struct bcm_sysport_cb *cb,
 872                                        unsigned int *bytes_compl,
 873                                        unsigned int *pkts_compl)
 874 {
 875         struct bcm_sysport_priv *priv = ring->priv;
 876         struct device *kdev = &priv->pdev->dev;
 877
 878         if (cb->skb) {
 879                 *bytes_compl += cb->skb->len;
 880                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 881                                  dma_unmap_len(cb, dma_len),
 882                                  DMA_TO_DEVICE);
 883                 (*pkts_compl)++;
 884                 bcm_sysport_free_cb(cb);
 885         /* SKB fragment */
 886         } else if (dma_unmap_addr(cb, dma_addr)) {
 887                 *bytes_compl += dma_unmap_len(cb, dma_len);
 888                 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
 889                                dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
 890                 dma_unmap_addr_set(cb, dma_addr, 0);
 891         }
 892 }
 893
 894 /* Reclaim queued SKBs for transmission completion, lockless version */
 895 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 896                                              struct bcm_sysport_tx_ring *ring)
 897 {
 898         unsigned int pkts_compl = 0, bytes_compl = 0;
 899         struct net_device *ndev = priv->netdev;
 900         unsigned int txbds_processed = 0;
 901         struct bcm_sysport_cb *cb;
 902         unsigned int txbds_ready;
 903         unsigned int c_index;
 904         u32 hw_ind;
 905
 906         /* Clear status before servicing to reduce spurious interrupts */
 907         if (!ring->priv->is_lite)
 908                 intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR);
 909         else
 910                 intrl2_0_writel(ring->priv, BIT(ring->index +
 911                                 INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR);
 912
 913         /* Compute how many descriptors have been processed since last call */
 914         hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
 915         c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
 916         txbds_ready = (c_index - ring->c_index) & RING_CONS_INDEX_MASK;
 917
 918         netif_dbg(priv, tx_done, ndev,
 919                   "ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
 920                   ring->index, ring->c_index, c_index, txbds_ready);
 921
 922         while (txbds_processed < txbds_ready) {
 923                 cb = &ring->cbs[ring->clean_index];
 924                 bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl);
 925
 926                 ring->desc_count++;
 927                 txbds_processed++;
 928
 929                 if (likely(ring->clean_index < ring->size - 1))
 930                         ring->clean_index++;
 931                 else
 932                         ring->clean_index = 0;
 933         }
 934
 935         u64_stats_update_begin(&priv->syncp);
 936         ring->packets += pkts_compl;
 937         ring->bytes += bytes_compl;
 938         u64_stats_update_end(&priv->syncp);
 939
 940         ring->c_index = c_index;
 941
 942         netif_dbg(priv, tx_done, ndev,
 943                   "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
 944                   ring->index, ring->c_index, pkts_compl, bytes_compl);
 945
 946         return pkts_compl;
 947 }
 948
 949 /* Locked version of the per-ring TX reclaim routine */
 950 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 951                                            struct bcm_sysport_tx_ring *ring)
 952 {
 953         struct netdev_queue *txq;
 954         unsigned int released;
 955         unsigned long flags;
 956
 957         txq = netdev_get_tx_queue(priv->netdev, ring->index);
 958
 959         spin_lock_irqsave(&ring->lock, flags);
 960         released = __bcm_sysport_tx_reclaim(priv, ring);
 961         if (released)
 962                 netif_tx_wake_queue(txq);
 963
 964         spin_unlock_irqrestore(&ring->lock, flags);
 965
 966         return released;
 967 }
 968
 969 /* Locked version of the per-ring TX reclaim, but does not wake the queue */
 970 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv,
 971                                  struct bcm_sysport_tx_ring *ring)
 972 {
 973         unsigned long flags;
 974
 975         spin_lock_irqsave(&ring->lock, flags);
 976         __bcm_sysport_tx_reclaim(priv, ring);
 977         spin_unlock_irqrestore(&ring->lock, flags);
 978 }
 979
 980 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
 981 {
 982         struct bcm_sysport_tx_ring *ring =
 983                 container_of(napi, struct bcm_sysport_tx_ring, napi);
 984         unsigned int work_done = 0;
 985
 986         work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
 987
 988         if (work_done == 0) {
 989                 napi_complete(napi);
 990                 /* re-enable TX interrupt */
 991                 if (!ring->priv->is_lite)
 992                         intrl2_1_mask_clear(ring->priv, BIT(ring->index));
 993                 else
 994                         intrl2_0_mask_clear(ring->priv, BIT(ring->index +
 995                                             INTRL2_0_TDMA_MBDONE_SHIFT));
 996
 997                 return 0;
 998         }
 999
1000         return budget;
1001 }
1002
1003 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
1004 {
1005         unsigned int q;
1006
1007         for (q = 0; q < priv->netdev->num_tx_queues; q++)
1008                 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
1009 }
1010
1011 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
1012 {
1013         struct bcm_sysport_priv *priv =
1014                 container_of(napi, struct bcm_sysport_priv, napi);
1015         struct dim_sample dim_sample = {};
1016         unsigned int work_done = 0;
1017
1018         work_done = bcm_sysport_desc_rx(priv, budget);
1019
1020         priv->rx_c_index += work_done;
1021         priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
1022
1023         /* SYSTEMPORT Lite groups the producer/consumer index, producer is
1024          * maintained by HW, but writes to it will be ignore while RDMA
1025          * is active
1026          */
1027         if (!priv->is_lite)
1028                 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
1029         else
1030                 rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX);
1031
1032         if (work_done < budget) {
1033                 napi_complete_done(napi, work_done);
1034                 /* re-enable RX interrupts */
1035                 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
1036         }
1037
1038         if (priv->dim.use_dim) {
1039                 dim_update_sample(priv->dim.event_ctr, priv->dim.packets,
1040                                   priv->dim.bytes, &dim_sample);
1041                 net_dim(&priv->dim.dim, dim_sample);
1042         }
1043
1044         return work_done;
1045 }
1046
1047 static void mpd_enable_set(struct bcm_sysport_priv *priv, bool enable)
1048 {
1049         u32 reg, bit;
1050
1051         reg = umac_readl(priv, UMAC_MPD_CTRL);
1052         if (enable)
1053                 reg |= MPD_EN;
1054         else
1055                 reg &= ~MPD_EN;
1056         umac_writel(priv, reg, UMAC_MPD_CTRL);
1057
1058         if (priv->is_lite)
1059                 bit = RBUF_ACPI_EN_LITE;
1060         else
1061                 bit = RBUF_ACPI_EN;
1062
1063         reg = rbuf_readl(priv, RBUF_CONTROL);
1064         if (enable)
1065                 reg |= bit;
1066         else
1067                 reg &= ~bit;
1068         rbuf_writel(priv, reg, RBUF_CONTROL);
1069 }
1070
1071 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
1072 {
1073         unsigned int index;
1074         u32 reg;
1075
1076         /* Disable RXCHK, active filters and Broadcom tag matching */
1077         reg = rxchk_readl(priv, RXCHK_CONTROL);
1078         reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
1079                  RXCHK_BRCM_TAG_MATCH_SHIFT | RXCHK_EN | RXCHK_BRCM_TAG_EN);
1080         rxchk_writel(priv, reg, RXCHK_CONTROL);
1081
1082         /* Make sure we restore correct CID index in case HW lost
1083          * its context during deep idle state
1084          */
1085         for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
1086                 rxchk_writel(priv, priv->filters_loc[index] <<
1087                              RXCHK_BRCM_TAG_CID_SHIFT, RXCHK_BRCM_TAG(index));
1088                 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
1089         }
1090
1091         /* Clear the MagicPacket detection logic */
1092         mpd_enable_set(priv, false);
1093
1094         reg = intrl2_0_readl(priv, INTRL2_CPU_STATUS);
1095         if (reg & INTRL2_0_MPD)
1096                 netdev_info(priv->netdev, "Wake-on-LAN (MPD) interrupt!\n");
1097
1098         if (reg & INTRL2_0_BRCM_MATCH_TAG) {
1099                 reg = rxchk_readl(priv, RXCHK_BRCM_TAG_MATCH_STATUS) &
1100                                   RXCHK_BRCM_TAG_MATCH_MASK;
1101                 netdev_info(priv->netdev,
1102                             "Wake-on-LAN (filters 0x%02x) interrupt!\n", reg);
1103         }
1104
1105         netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
1106 }
1107
1108 static void bcm_sysport_dim_work(struct work_struct *work)
1109 {
1110         struct dim *dim = container_of(work, struct dim, work);
1111         struct bcm_sysport_net_dim *ndim =
1112                         container_of(dim, struct bcm_sysport_net_dim, dim);
1113         struct bcm_sysport_priv *priv =
1114                         container_of(ndim, struct bcm_sysport_priv, dim);
1115         struct dim_cq_moder cur_profile = net_dim_get_rx_moderation(dim->mode,
1116                                                                     dim->profile_ix);
1117
1118         bcm_sysport_set_rx_coalesce(priv, cur_profile.usec, cur_profile.pkts);
1119         dim->state = DIM_START_MEASURE;
1120 }
1121
1122 /* RX and misc interrupt routine */
1123 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
1124 {
1125         struct net_device *dev = dev_id;
1126         struct bcm_sysport_priv *priv = netdev_priv(dev);
1127         struct bcm_sysport_tx_ring *txr;
1128         unsigned int ring, ring_bit;
1129
1130         priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
1131                           ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
1132         intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
1133
1134         if (unlikely(priv->irq0_stat == 0)) {
1135                 netdev_warn(priv->netdev, "spurious RX interrupt\n");
1136                 return IRQ_NONE;
1137         }
1138
1139         if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
1140                 priv->dim.event_ctr++;
1141                 if (likely(napi_schedule_prep(&priv->napi))) {
1142                         /* disable RX interrupts */
1143                         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
1144                         __napi_schedule_irqoff(&priv->napi);
1145                 }
1146         }
1147
1148         /* TX ring is full, perform a full reclaim since we do not know
1149          * which one would trigger this interrupt
1150          */
1151         if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
1152                 bcm_sysport_tx_reclaim_all(priv);
1153
1154         if (!priv->is_lite)
1155                 goto out;
1156
1157         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1158                 ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT);
1159                 if (!(priv->irq0_stat & ring_bit))
1160                         continue;
1161
1162                 txr = &priv->tx_rings[ring];
1163
1164                 if (likely(napi_schedule_prep(&txr->napi))) {
1165                         intrl2_0_mask_set(priv, ring_bit);
1166                         __napi_schedule(&txr->napi);
1167                 }
1168         }
1169 out:
1170         return IRQ_HANDLED;
1171 }
1172
1173 /* TX interrupt service routine */
1174 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
1175 {
1176         struct net_device *dev = dev_id;
1177         struct bcm_sysport_priv *priv = netdev_priv(dev);
1178         struct bcm_sysport_tx_ring *txr;
1179         unsigned int ring;
1180
1181         priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
1182                                 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
1183         intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1184
1185         if (unlikely(priv->irq1_stat == 0)) {
1186                 netdev_warn(priv->netdev, "spurious TX interrupt\n");
1187                 return IRQ_NONE;
1188         }
1189
1190         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1191                 if (!(priv->irq1_stat & BIT(ring)))
1192                         continue;
1193
1194                 txr = &priv->tx_rings[ring];
1195
1196                 if (likely(napi_schedule_prep(&txr->napi))) {
1197                         intrl2_1_mask_set(priv, BIT(ring));
1198                         __napi_schedule_irqoff(&txr->napi);
1199                 }
1200         }
1201
1202         return IRQ_HANDLED;
1203 }
1204
1205 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
1206 {
1207         struct bcm_sysport_priv *priv = dev_id;
1208
1209         pm_wakeup_event(&priv->pdev->dev, 0);
1210
1211         return IRQ_HANDLED;
1212 }
1213
1214 #ifdef CONFIG_NET_POLL_CONTROLLER
1215 static void bcm_sysport_poll_controller(struct net_device *dev)
1216 {
1217         struct bcm_sysport_priv *priv = netdev_priv(dev);
1218
1219         disable_irq(priv->irq0);
1220         bcm_sysport_rx_isr(priv->irq0, priv);
1221         enable_irq(priv->irq0);
1222
1223         if (!priv->is_lite) {
1224                 disable_irq(priv->irq1);
1225                 bcm_sysport_tx_isr(priv->irq1, priv);
1226                 enable_irq(priv->irq1);
1227         }
1228 }
1229 #endif
1230
1231 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
1232                                               struct net_device *dev)
1233 {
1234         struct bcm_sysport_priv *priv = netdev_priv(dev);
1235         struct sk_buff *nskb;
1236         struct bcm_tsb *tsb;
1237         u32 csum_info;
1238         u8 ip_proto;
1239         u16 csum_start;
1240         __be16 ip_ver;
1241
1242         /* Re-allocate SKB if needed */
1243         if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
1244                 nskb = skb_realloc_headroom(skb, sizeof(*tsb));
1245                 if (!nskb) {
1246                         dev_kfree_skb_any(skb);
1247                         priv->mib.tx_realloc_tsb_failed++;
1248                         dev->stats.tx_errors++;
1249                         dev->stats.tx_dropped++;
1250                         return NULL;
1251                 }
1252                 dev_consume_skb_any(skb);
1253                 skb = nskb;
1254                 priv->mib.tx_realloc_tsb++;
1255         }
1256
1257         tsb = skb_push(skb, sizeof(*tsb));
1258         /* Zero-out TSB by default */
1259         memset(tsb, 0, sizeof(*tsb));
1260
1261         if (skb_vlan_tag_present(skb)) {
1262                 tsb->pcp_dei_vid = skb_vlan_tag_get_prio(skb) & PCP_DEI_MASK;
1263                 tsb->pcp_dei_vid |= (u32)skb_vlan_tag_get_id(skb) << VID_SHIFT;
1264         }
1265
1266         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1267                 ip_ver = skb->protocol;
1268                 switch (ip_ver) {
1269                 case htons(ETH_P_IP):
1270                         ip_proto = ip_hdr(skb)->protocol;
1271                         break;
1272                 case htons(ETH_P_IPV6):
1273                         ip_proto = ipv6_hdr(skb)->nexthdr;
1274                         break;
1275                 default:
1276                         return skb;
1277                 }
1278
1279                 /* Get the checksum offset and the L4 (transport) offset */
1280                 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
1281                 /* Account for the HW inserted VLAN tag */
1282                 if (skb_vlan_tag_present(skb))
1283                         csum_start += VLAN_HLEN;
1284                 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
1285                 csum_info |= (csum_start << L4_PTR_SHIFT);
1286
1287                 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1288                         csum_info |= L4_LENGTH_VALID;
1289                         if (ip_proto == IPPROTO_UDP &&
1290                             ip_ver == htons(ETH_P_IP))
1291                                 csum_info |= L4_UDP;
1292                 } else {
1293                         csum_info = 0;
1294                 }
1295
1296                 tsb->l4_ptr_dest_map = csum_info;
1297         }
1298
1299         return skb;
1300 }
1301
1302 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
1303                                     struct net_device *dev)
1304 {
1305         struct bcm_sysport_priv *priv = netdev_priv(dev);
1306         struct device *kdev = &priv->pdev->dev;
1307         struct bcm_sysport_tx_ring *ring;
1308         struct bcm_sysport_cb *cb;
1309         struct netdev_queue *txq;
1310         u32 len_status, addr_lo;
1311         unsigned int skb_len;
1312         unsigned long flags;
1313         dma_addr_t mapping;
1314         u16 queue;
1315         int ret;
1316
1317         queue = skb_get_queue_mapping(skb);
1318         txq = netdev_get_tx_queue(dev, queue);
1319         ring = &priv->tx_rings[queue];
1320
1321         /* lock against tx reclaim in BH context and TX ring full interrupt */
1322         spin_lock_irqsave(&ring->lock, flags);
1323         if (unlikely(ring->desc_count == 0)) {
1324                 netif_tx_stop_queue(txq);
1325                 netdev_err(dev, "queue %d awake and ring full!\n", queue);
1326                 ret = NETDEV_TX_BUSY;
1327                 goto out;
1328         }
1329
1330         /* Insert TSB and checksum infos */
1331         if (priv->tsb_en) {
1332                 skb = bcm_sysport_insert_tsb(skb, dev);
1333                 if (!skb) {
1334                         ret = NETDEV_TX_OK;
1335                         goto out;
1336                 }
1337         }
1338
1339         skb_len = skb->len;
1340
1341         mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1342         if (dma_mapping_error(kdev, mapping)) {
1343                 priv->mib.tx_dma_failed++;
1344                 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
1345                           skb->data, skb_len);
1346                 ret = NETDEV_TX_OK;
1347                 goto out;
1348         }
1349
1350         /* Remember the SKB for future freeing */
1351         cb = &ring->cbs[ring->curr_desc];
1352         cb->skb = skb;
1353         dma_unmap_addr_set(cb, dma_addr, mapping);
1354         dma_unmap_len_set(cb, dma_len, skb_len);
1355
1356         addr_lo = lower_32_bits(mapping);
1357         len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
1358         len_status |= (skb_len << DESC_LEN_SHIFT);
1359         len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
1360                        DESC_STATUS_SHIFT;
1361         if (skb->ip_summed == CHECKSUM_PARTIAL)
1362                 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1363         if (skb_vlan_tag_present(skb))
1364                 len_status |= (TX_STATUS_VLAN_VID_TSB << DESC_STATUS_SHIFT);
1365
1366         ring->curr_desc++;
1367         if (ring->curr_desc == ring->size)
1368                 ring->curr_desc = 0;
1369         ring->desc_count--;
1370
1371         /* Ports are latched, so write upper address first */
1372         tdma_writel(priv, len_status, TDMA_WRITE_PORT_HI(ring->index));
1373         tdma_writel(priv, addr_lo, TDMA_WRITE_PORT_LO(ring->index));
1374
1375         /* Check ring space and update SW control flow */
1376         if (ring->desc_count == 0)
1377                 netif_tx_stop_queue(txq);
1378
1379         netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
1380                   ring->index, ring->desc_count, ring->curr_desc);
1381
1382         ret = NETDEV_TX_OK;
1383 out:
1384         spin_unlock_irqrestore(&ring->lock, flags);
1385         return ret;
1386 }
1387
1388 static void bcm_sysport_tx_timeout(struct net_device *dev, unsigned int txqueue)
1389 {
1390         netdev_warn(dev, "transmit timeout!\n");
1391
1392         netif_trans_update(dev);
1393         dev->stats.tx_errors++;
1394
1395         netif_tx_wake_all_queues(dev);
1396 }
1397
1398 /* phylib adjust link callback */
1399 static void bcm_sysport_adj_link(struct net_device *dev)
1400 {
1401         struct bcm_sysport_priv *priv = netdev_priv(dev);
1402         struct phy_device *phydev = dev->phydev;
1403         unsigned int changed = 0;
1404         u32 cmd_bits = 0, reg;
1405
1406         if (priv->old_link != phydev->link) {
1407                 changed = 1;
1408                 priv->old_link = phydev->link;
1409         }
1410
1411         if (priv->old_duplex != phydev->duplex) {
1412                 changed = 1;
1413                 priv->old_duplex = phydev->duplex;
1414         }
1415
1416         if (priv->is_lite)
1417                 goto out;
1418
1419         switch (phydev->speed) {
1420         case SPEED_2500:
1421                 cmd_bits = CMD_SPEED_2500;
1422                 break;
1423         case SPEED_1000:
1424                 cmd_bits = CMD_SPEED_1000;
1425                 break;
1426         case SPEED_100:
1427                 cmd_bits = CMD_SPEED_100;
1428                 break;
1429         case SPEED_10:
1430                 cmd_bits = CMD_SPEED_10;
1431                 break;
1432         default:
1433                 break;
1434         }
1435         cmd_bits <<= CMD_SPEED_SHIFT;
1436
1437         if (phydev->duplex == DUPLEX_HALF)
1438                 cmd_bits |= CMD_HD_EN;
1439
1440         if (priv->old_pause != phydev->pause) {
1441                 changed = 1;
1442                 priv->old_pause = phydev->pause;
1443         }
1444
1445         if (!phydev->pause)
1446                 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1447
1448         if (!changed)
1449                 return;
1450
1451         if (phydev->link) {
1452                 reg = umac_readl(priv, UMAC_CMD);
1453                 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
1454                         CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1455                         CMD_TX_PAUSE_IGNORE);
1456                 reg |= cmd_bits;
1457                 umac_writel(priv, reg, UMAC_CMD);
1458         }
1459 out:
1460         if (changed)
1461                 phy_print_status(phydev);
1462 }
1463
1464 static void bcm_sysport_init_dim(struct bcm_sysport_priv *priv,
1465                                  void (*cb)(struct work_struct *work))
1466 {
1467         struct bcm_sysport_net_dim *dim = &priv->dim;
1468
1469         INIT_WORK(&dim->dim.work, cb);
1470         dim->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1471         dim->event_ctr = 0;
1472         dim->packets = 0;
1473         dim->bytes = 0;
1474 }
1475
1476 static void bcm_sysport_init_rx_coalesce(struct bcm_sysport_priv *priv)
1477 {
1478         struct bcm_sysport_net_dim *dim = &priv->dim;
1479         struct dim_cq_moder moder;
1480         u32 usecs, pkts;
1481
1482         usecs = priv->rx_coalesce_usecs;
1483         pkts = priv->rx_max_coalesced_frames;
1484
1485         /* If DIM was enabled, re-apply default parameters */
1486         if (dim->use_dim) {
1487                 moder = net_dim_get_def_rx_moderation(dim->dim.mode);
1488                 usecs = moder.usec;
1489                 pkts = moder.pkts;
1490         }
1491
1492         bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
1493 }
1494
1495 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1496                                     unsigned int index)
1497 {
1498         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1499         size_t size;
1500         u32 reg;
1501
1502         /* Simple descriptors partitioning for now */
1503         size = 256;
1504
1505         ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1506         if (!ring->cbs) {
1507                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1508                 return -ENOMEM;
1509         }
1510
1511         /* Initialize SW view of the ring */
1512         spin_lock_init(&ring->lock);
1513         ring->priv = priv;
1514         netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64);
1515         ring->index = index;
1516         ring->size = size;
1517         ring->clean_index = 0;
1518         ring->alloc_size = ring->size;
1519         ring->desc_count = ring->size;
1520         ring->curr_desc = 0;
1521
1522         /* Initialize HW ring */
1523         tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1524         tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1525         tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1526         tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1527
1528         /* Configure QID and port mapping */
1529         reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index));
1530         reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT);
1531         if (ring->inspect) {
1532                 reg |= ring->switch_queue & RING_QID_MASK;
1533                 reg |= ring->switch_port << RING_PORT_ID_SHIFT;
1534         } else {
1535                 reg |= RING_IGNORE_STATUS;
1536         }
1537         tdma_writel(priv, reg, TDMA_DESC_RING_MAPPING(index));
1538         reg = 0;
1539         /* Adjust the packet size calculations if SYSTEMPORT is responsible
1540          * for HW insertion of VLAN tags
1541          */
1542         if (priv->netdev->features & NETIF_F_HW_VLAN_CTAG_TX)
1543                 reg = VLAN_HLEN << RING_PKT_SIZE_ADJ_SHIFT;
1544         tdma_writel(priv, reg, TDMA_DESC_RING_PCP_DEI_VID(index));
1545
1546         /* Enable ACB algorithm 2 */
1547         reg = tdma_readl(priv, TDMA_CONTROL);
1548         reg |= tdma_control_bit(priv, ACB_ALGO);
1549         tdma_writel(priv, reg, TDMA_CONTROL);
1550
1551         /* Do not use tdma_control_bit() here because TSB_SWAP1 collides
1552          * with the original definition of ACB_ALGO
1553          */
1554         reg = tdma_readl(priv, TDMA_CONTROL);
1555         if (priv->is_lite)
1556                 reg &= ~BIT(TSB_SWAP1);
1557         /* Set a correct TSB format based on host endian */
1558         if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1559                 reg |= tdma_control_bit(priv, TSB_SWAP0);
1560         else
1561                 reg &= ~tdma_control_bit(priv, TSB_SWAP0);
1562         tdma_writel(priv, reg, TDMA_CONTROL);
1563
1564         /* Program the number of descriptors as MAX_THRESHOLD and half of
1565          * its size for the hysteresis trigger
1566          */
1567         tdma_writel(priv, ring->size |
1568                         1 << RING_HYST_THRESH_SHIFT,
1569                         TDMA_DESC_RING_MAX_HYST(index));
1570
1571         /* Enable the ring queue in the arbiter */
1572         reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1573         reg |= (1 << index);
1574         tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1575
1576         napi_enable(&ring->napi);
1577
1578         netif_dbg(priv, hw, priv->netdev,
1579                   "TDMA cfg, size=%d, switch q=%d,port=%d\n",
1580                   ring->size, ring->switch_queue,
1581                   ring->switch_port);
1582
1583         return 0;
1584 }
1585
1586 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1587                                      unsigned int index)
1588 {
1589         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1590         u32 reg;
1591
1592         /* Caller should stop the TDMA engine */
1593         reg = tdma_readl(priv, TDMA_STATUS);
1594         if (!(reg & TDMA_DISABLED))
1595                 netdev_warn(priv->netdev, "TDMA not stopped!\n");
1596
1597         /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1598          * fail, so by checking this pointer we know whether the TX ring was
1599          * fully initialized or not.
1600          */
1601         if (!ring->cbs)
1602                 return;
1603
1604         napi_disable(&ring->napi);
1605         netif_napi_del(&ring->napi);
1606
1607         bcm_sysport_tx_clean(priv, ring);
1608
1609         kfree(ring->cbs);
1610         ring->cbs = NULL;
1611         ring->size = 0;
1612         ring->alloc_size = 0;
1613
1614         netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1615 }
1616
1617 /* RDMA helper */
1618 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1619                                   unsigned int enable)
1620 {
1621         unsigned int timeout = 1000;
1622         u32 reg;
1623
1624         reg = rdma_readl(priv, RDMA_CONTROL);
1625         if (enable)
1626                 reg |= RDMA_EN;
1627         else
1628                 reg &= ~RDMA_EN;
1629         rdma_writel(priv, reg, RDMA_CONTROL);
1630
1631         /* Poll for RMDA disabling completion */
1632         do {
1633                 reg = rdma_readl(priv, RDMA_STATUS);
1634                 if (!!(reg & RDMA_DISABLED) == !enable)
1635                         return 0;
1636                 usleep_range(1000, 2000);
1637         } while (timeout-- > 0);
1638
1639         netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1640
1641         return -ETIMEDOUT;
1642 }
1643
1644 /* TDMA helper */
1645 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1646                                   unsigned int enable)
1647 {
1648         unsigned int timeout = 1000;
1649         u32 reg;
1650
1651         reg = tdma_readl(priv, TDMA_CONTROL);
1652         if (enable)
1653                 reg |= tdma_control_bit(priv, TDMA_EN);
1654         else
1655                 reg &= ~tdma_control_bit(priv, TDMA_EN);
1656         tdma_writel(priv, reg, TDMA_CONTROL);
1657
1658         /* Poll for TMDA disabling completion */
1659         do {
1660                 reg = tdma_readl(priv, TDMA_STATUS);
1661                 if (!!(reg & TDMA_DISABLED) == !enable)
1662                         return 0;
1663
1664                 usleep_range(1000, 2000);
1665         } while (timeout-- > 0);
1666
1667         netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1668
1669         return -ETIMEDOUT;
1670 }
1671
1672 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1673 {
1674         struct bcm_sysport_cb *cb;
1675         u32 reg;
1676         int ret;
1677         int i;
1678
1679         /* Initialize SW view of the RX ring */
1680         priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC;
1681         priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1682         priv->rx_c_index = 0;
1683         priv->rx_read_ptr = 0;
1684         priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1685                                 GFP_KERNEL);
1686         if (!priv->rx_cbs) {
1687                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1688                 return -ENOMEM;
1689         }
1690
1691         for (i = 0; i < priv->num_rx_bds; i++) {
1692                 cb = priv->rx_cbs + i;
1693                 cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1694         }
1695
1696         ret = bcm_sysport_alloc_rx_bufs(priv);
1697         if (ret) {
1698                 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1699                 return ret;
1700         }
1701
1702         /* Initialize HW, ensure RDMA is disabled */
1703         reg = rdma_readl(priv, RDMA_STATUS);
1704         if (!(reg & RDMA_DISABLED))
1705                 rdma_enable_set(priv, 0);
1706
1707         rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1708         rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1709         rdma_writel(priv, 0, RDMA_PROD_INDEX);
1710         rdma_writel(priv, 0, RDMA_CONS_INDEX);
1711         rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1712                           RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1713         /* Operate the queue in ring mode */
1714         rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1715         rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1716         rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1717         rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO);
1718
1719         netif_dbg(priv, hw, priv->netdev,
1720                   "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1721                   priv->num_rx_bds, priv->rx_bds);
1722
1723         return 0;
1724 }
1725
1726 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1727 {
1728         struct bcm_sysport_cb *cb;
1729         unsigned int i;
1730         u32 reg;
1731
1732         /* Caller should ensure RDMA is disabled */
1733         reg = rdma_readl(priv, RDMA_STATUS);
1734         if (!(reg & RDMA_DISABLED))
1735                 netdev_warn(priv->netdev, "RDMA not stopped!\n");
1736
1737         for (i = 0; i < priv->num_rx_bds; i++) {
1738                 cb = &priv->rx_cbs[i];
1739                 if (dma_unmap_addr(cb, dma_addr))
1740                         dma_unmap_single(&priv->pdev->dev,
1741                                          dma_unmap_addr(cb, dma_addr),
1742                                          RX_BUF_LENGTH, DMA_FROM_DEVICE);
1743                 bcm_sysport_free_cb(cb);
1744         }
1745
1746         kfree(priv->rx_cbs);
1747         priv->rx_cbs = NULL;
1748
1749         netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1750 }
1751
1752 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1753 {
1754         struct bcm_sysport_priv *priv = netdev_priv(dev);
1755         u32 reg;
1756
1757         if (priv->is_lite)
1758                 return;
1759
1760         reg = umac_readl(priv, UMAC_CMD);
1761         if (dev->flags & IFF_PROMISC)
1762                 reg |= CMD_PROMISC;
1763         else
1764                 reg &= ~CMD_PROMISC;
1765         umac_writel(priv, reg, UMAC_CMD);
1766
1767         /* No support for ALLMULTI */
1768         if (dev->flags & IFF_ALLMULTI)
1769                 return;
1770 }
1771
1772 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1773                                    u32 mask, unsigned int enable)
1774 {
1775         u32 reg;
1776
1777         if (!priv->is_lite) {
1778                 reg = umac_readl(priv, UMAC_CMD);
1779                 if (enable)
1780                         reg |= mask;
1781                 else
1782                         reg &= ~mask;
1783                 umac_writel(priv, reg, UMAC_CMD);
1784         } else {
1785                 reg = gib_readl(priv, GIB_CONTROL);
1786                 if (enable)
1787                         reg |= mask;
1788                 else
1789                         reg &= ~mask;
1790                 gib_writel(priv, reg, GIB_CONTROL);
1791         }
1792
1793         /* UniMAC stops on a packet boundary, wait for a full-sized packet
1794          * to be processed (1 msec).
1795          */
1796         if (enable == 0)
1797                 usleep_range(1000, 2000);
1798 }
1799
1800 static inline void umac_reset(struct bcm_sysport_priv *priv)
1801 {
1802         u32 reg;
1803
1804         if (priv->is_lite)
1805                 return;
1806
1807         reg = umac_readl(priv, UMAC_CMD);
1808         reg |= CMD_SW_RESET;
1809         umac_writel(priv, reg, UMAC_CMD);
1810         udelay(10);
1811         reg = umac_readl(priv, UMAC_CMD);
1812         reg &= ~CMD_SW_RESET;
1813         umac_writel(priv, reg, UMAC_CMD);
1814 }
1815
1816 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1817                              unsigned char *addr)
1818 {
1819         u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) |
1820                     addr[3];
1821         u32 mac1 = (addr[4] << 8) | addr[5];
1822
1823         if (!priv->is_lite) {
1824                 umac_writel(priv, mac0, UMAC_MAC0);
1825                 umac_writel(priv, mac1, UMAC_MAC1);
1826         } else {
1827                 gib_writel(priv, mac0, GIB_MAC0);
1828                 gib_writel(priv, mac1, GIB_MAC1);
1829         }
1830 }
1831
1832 static void topctrl_flush(struct bcm_sysport_priv *priv)
1833 {
1834         topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1835         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1836         mdelay(1);
1837         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1838         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1839 }
1840
1841 static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1842 {
1843         struct bcm_sysport_priv *priv = netdev_priv(dev);
1844         struct sockaddr *addr = p;
1845
1846         if (!is_valid_ether_addr(addr->sa_data))
1847                 return -EINVAL;
1848
1849         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1850
1851         /* interface is disabled, changes to MAC will be reflected on next
1852          * open call
1853          */
1854         if (!netif_running(dev))
1855                 return 0;
1856
1857         umac_set_hw_addr(priv, dev->dev_addr);
1858
1859         return 0;
1860 }
1861
1862 static void bcm_sysport_get_stats64(struct net_device *dev,
1863                                     struct rtnl_link_stats64 *stats)
1864 {
1865         struct bcm_sysport_priv *priv = netdev_priv(dev);
1866         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
1867         unsigned int start;
1868
1869         netdev_stats_to_stats64(stats, &dev->stats);
1870
1871         bcm_sysport_update_tx_stats(priv, &stats->tx_bytes,
1872                                     &stats->tx_packets);
1873
1874         do {
1875                 start = u64_stats_fetch_begin_irq(&priv->syncp);
1876                 stats->rx_packets = stats64->rx_packets;
1877                 stats->rx_bytes = stats64->rx_bytes;
1878         } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
1879 }
1880
1881 static void bcm_sysport_netif_start(struct net_device *dev)
1882 {
1883         struct bcm_sysport_priv *priv = netdev_priv(dev);
1884
1885         /* Enable NAPI */
1886         bcm_sysport_init_dim(priv, bcm_sysport_dim_work);
1887         bcm_sysport_init_rx_coalesce(priv);
1888         napi_enable(&priv->napi);
1889
1890         /* Enable RX interrupt and TX ring full interrupt */
1891         intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1892
1893         phy_start(dev->phydev);
1894
1895         /* Enable TX interrupts for the TXQs */
1896         if (!priv->is_lite)
1897                 intrl2_1_mask_clear(priv, 0xffffffff);
1898         else
1899                 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK);
1900 }
1901
1902 static void rbuf_init(struct bcm_sysport_priv *priv)
1903 {
1904         u32 reg;
1905
1906         reg = rbuf_readl(priv, RBUF_CONTROL);
1907         reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1908         /* Set a correct RSB format on SYSTEMPORT Lite */
1909         if (priv->is_lite)
1910                 reg &= ~RBUF_RSB_SWAP1;
1911
1912         /* Set a correct RSB format based on host endian */
1913         if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1914                 reg |= RBUF_RSB_SWAP0;
1915         else
1916                 reg &= ~RBUF_RSB_SWAP0;
1917         rbuf_writel(priv, reg, RBUF_CONTROL);
1918 }
1919
1920 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv)
1921 {
1922         intrl2_0_mask_set(priv, 0xffffffff);
1923         intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1924         if (!priv->is_lite) {
1925                 intrl2_1_mask_set(priv, 0xffffffff);
1926                 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1927         }
1928 }
1929
1930 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv)
1931 {
1932         u32 reg;
1933
1934         reg = gib_readl(priv, GIB_CONTROL);
1935         /* Include Broadcom tag in pad extension and fix up IPG_LENGTH */
1936         if (netdev_uses_dsa(priv->netdev)) {
1937                 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT);
1938                 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT;
1939         }
1940         reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT);
1941         reg |= 12 << GIB_IPG_LEN_SHIFT;
1942         gib_writel(priv, reg, GIB_CONTROL);
1943 }
1944
1945 static int bcm_sysport_open(struct net_device *dev)
1946 {
1947         struct bcm_sysport_priv *priv = netdev_priv(dev);
1948         struct phy_device *phydev;
1949         unsigned int i;
1950         int ret;
1951
1952         clk_prepare_enable(priv->clk);
1953
1954         /* Reset UniMAC */
1955         umac_reset(priv);
1956
1957         /* Flush TX and RX FIFOs at TOPCTRL level */
1958         topctrl_flush(priv);
1959
1960         /* Disable the UniMAC RX/TX */
1961         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1962
1963         /* Enable RBUF 2bytes alignment and Receive Status Block */
1964         rbuf_init(priv);
1965
1966         /* Set maximum frame length */
1967         if (!priv->is_lite)
1968                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1969         else
1970                 gib_set_pad_extension(priv);
1971
1972         /* Apply features again in case we changed them while interface was
1973          * down
1974          */
1975         bcm_sysport_set_features(dev, dev->features);
1976
1977         /* Set MAC address */
1978         umac_set_hw_addr(priv, dev->dev_addr);
1979
1980         phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1981                                 0, priv->phy_interface);
1982         if (!phydev) {
1983                 netdev_err(dev, "could not attach to PHY\n");
1984                 ret = -ENODEV;
1985                 goto out_clk_disable;
1986         }
1987
1988         /* Reset house keeping link status */
1989         priv->old_duplex = -1;
1990         priv->old_link = -1;
1991         priv->old_pause = -1;
1992
1993         /* mask all interrupts and request them */
1994         bcm_sysport_mask_all_intrs(priv);
1995
1996         ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
1997         if (ret) {
1998                 netdev_err(dev, "failed to request RX interrupt\n");
1999                 goto out_phy_disconnect;
2000         }
2001
2002         if (!priv->is_lite) {
2003                 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0,
2004                                   dev->name, dev);
2005                 if (ret) {
2006                         netdev_err(dev, "failed to request TX interrupt\n");
2007                         goto out_free_irq0;
2008                 }
2009         }
2010
2011         /* Initialize both hardware and software ring */
2012         for (i = 0; i < dev->num_tx_queues; i++) {
2013                 ret = bcm_sysport_init_tx_ring(priv, i);
2014                 if (ret) {
2015                         netdev_err(dev, "failed to initialize TX ring %d\n",
2016                                    i);
2017                         goto out_free_tx_ring;
2018                 }
2019         }
2020
2021         /* Initialize linked-list */
2022         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2023
2024         /* Initialize RX ring */
2025         ret = bcm_sysport_init_rx_ring(priv);
2026         if (ret) {
2027                 netdev_err(dev, "failed to initialize RX ring\n");
2028                 goto out_free_rx_ring;
2029         }
2030
2031         /* Turn on RDMA */
2032         ret = rdma_enable_set(priv, 1);
2033         if (ret)
2034                 goto out_free_rx_ring;
2035
2036         /* Turn on TDMA */
2037         ret = tdma_enable_set(priv, 1);
2038         if (ret)
2039                 goto out_clear_rx_int;
2040
2041         /* Turn on UniMAC TX/RX */
2042         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
2043
2044         bcm_sysport_netif_start(dev);
2045
2046         netif_tx_start_all_queues(dev);
2047
2048         return 0;
2049
2050 out_clear_rx_int:
2051         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
2052 out_free_rx_ring:
2053         bcm_sysport_fini_rx_ring(priv);
2054 out_free_tx_ring:
2055         for (i = 0; i < dev->num_tx_queues; i++)
2056                 bcm_sysport_fini_tx_ring(priv, i);
2057         if (!priv->is_lite)
2058                 free_irq(priv->irq1, dev);
2059 out_free_irq0:
2060         free_irq(priv->irq0, dev);
2061 out_phy_disconnect:
2062         phy_disconnect(phydev);
2063 out_clk_disable:
2064         clk_disable_unprepare(priv->clk);
2065         return ret;
2066 }
2067
2068 static void bcm_sysport_netif_stop(struct net_device *dev)
2069 {
2070         struct bcm_sysport_priv *priv = netdev_priv(dev);
2071
2072         /* stop all software from updating hardware */
2073         netif_tx_disable(dev);
2074         napi_disable(&priv->napi);
2075         cancel_work_sync(&priv->dim.dim.work);
2076         phy_stop(dev->phydev);
2077
2078         /* mask all interrupts */
2079         bcm_sysport_mask_all_intrs(priv);
2080 }
2081
2082 static int bcm_sysport_stop(struct net_device *dev)
2083 {
2084         struct bcm_sysport_priv *priv = netdev_priv(dev);
2085         unsigned int i;
2086         int ret;
2087
2088         bcm_sysport_netif_stop(dev);
2089
2090         /* Disable UniMAC RX */
2091         umac_enable_set(priv, CMD_RX_EN, 0);
2092
2093         ret = tdma_enable_set(priv, 0);
2094         if (ret) {
2095                 netdev_err(dev, "timeout disabling RDMA\n");
2096                 return ret;
2097         }
2098
2099         /* Wait for a maximum packet size to be drained */
2100         usleep_range(2000, 3000);
2101
2102         ret = rdma_enable_set(priv, 0);
2103         if (ret) {
2104                 netdev_err(dev, "timeout disabling TDMA\n");
2105                 return ret;
2106         }
2107
2108         /* Disable UniMAC TX */
2109         umac_enable_set(priv, CMD_TX_EN, 0);
2110
2111         /* Free RX/TX rings SW structures */
2112         for (i = 0; i < dev->num_tx_queues; i++)
2113                 bcm_sysport_fini_tx_ring(priv, i);
2114         bcm_sysport_fini_rx_ring(priv);
2115
2116         free_irq(priv->irq0, dev);
2117         if (!priv->is_lite)
2118                 free_irq(priv->irq1, dev);
2119
2120         /* Disconnect from PHY */
2121         phy_disconnect(dev->phydev);
2122
2123         clk_disable_unprepare(priv->clk);
2124
2125         return 0;
2126 }
2127
2128 static int bcm_sysport_rule_find(struct bcm_sysport_priv *priv,
2129                                  u64 location)
2130 {
2131         unsigned int index;
2132         u32 reg;
2133
2134         for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2135                 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2136                 reg >>= RXCHK_BRCM_TAG_CID_SHIFT;
2137                 reg &= RXCHK_BRCM_TAG_CID_MASK;
2138                 if (reg == location)
2139                         return index;
2140         }
2141
2142         return -EINVAL;
2143 }
2144
2145 static int bcm_sysport_rule_get(struct bcm_sysport_priv *priv,
2146                                 struct ethtool_rxnfc *nfc)
2147 {
2148         int index;
2149
2150         /* This is not a rule that we know about */
2151         index = bcm_sysport_rule_find(priv, nfc->fs.location);
2152         if (index < 0)
2153                 return -EOPNOTSUPP;
2154
2155         nfc->fs.ring_cookie = RX_CLS_FLOW_WAKE;
2156
2157         return 0;
2158 }
2159
2160 static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv,
2161                                 struct ethtool_rxnfc *nfc)
2162 {
2163         unsigned int index;
2164         u32 reg;
2165
2166         /* We cannot match locations greater than what the classification ID
2167          * permits (256 entries)
2168          */
2169         if (nfc->fs.location > RXCHK_BRCM_TAG_CID_MASK)
2170                 return -E2BIG;
2171
2172         /* We cannot support flows that are not destined for a wake-up */
2173         if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE)
2174                 return -EOPNOTSUPP;
2175
2176         /* All filters are already in use, we cannot match more rules */
2177         if (bitmap_weight(priv->filters, RXCHK_BRCM_TAG_MAX) ==
2178             RXCHK_BRCM_TAG_MAX)
2179                 return -ENOSPC;
2180
2181         index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX);
2182         if (index >= RXCHK_BRCM_TAG_MAX)
2183                 return -ENOSPC;
2184
2185         /* Location is the classification ID, and index is the position
2186          * within one of our 8 possible filters to be programmed
2187          */
2188         reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2189         reg &= ~(RXCHK_BRCM_TAG_CID_MASK << RXCHK_BRCM_TAG_CID_SHIFT);
2190         reg |= nfc->fs.location << RXCHK_BRCM_TAG_CID_SHIFT;
2191         rxchk_writel(priv, reg, RXCHK_BRCM_TAG(index));
2192         rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
2193
2194         priv->filters_loc[index] = nfc->fs.location;
2195         set_bit(index, priv->filters);
2196
2197         return 0;
2198 }
2199
2200 static int bcm_sysport_rule_del(struct bcm_sysport_priv *priv,
2201                                 u64 location)
2202 {
2203         int index;
2204
2205         /* This is not a rule that we know about */
2206         index = bcm_sysport_rule_find(priv, location);
2207         if (index < 0)
2208                 return -EOPNOTSUPP;
2209
2210         /* No need to disable this filter if it was enabled, this will
2211          * be taken care of during suspend time by bcm_sysport_suspend_to_wol
2212          */
2213         clear_bit(index, priv->filters);
2214         priv->filters_loc[index] = 0;
2215
2216         return 0;
2217 }
2218
2219 static int bcm_sysport_get_rxnfc(struct net_device *dev,
2220                                  struct ethtool_rxnfc *nfc, u32 *rule_locs)
2221 {
2222         struct bcm_sysport_priv *priv = netdev_priv(dev);
2223         int ret = -EOPNOTSUPP;
2224
2225         switch (nfc->cmd) {
2226         case ETHTOOL_GRXCLSRULE:
2227                 ret = bcm_sysport_rule_get(priv, nfc);
2228                 break;
2229         default:
2230                 break;
2231         }
2232
2233         return ret;
2234 }
2235
2236 static int bcm_sysport_set_rxnfc(struct net_device *dev,
2237                                  struct ethtool_rxnfc *nfc)
2238 {
2239         struct bcm_sysport_priv *priv = netdev_priv(dev);
2240         int ret = -EOPNOTSUPP;
2241
2242         switch (nfc->cmd) {
2243         case ETHTOOL_SRXCLSRLINS:
2244                 ret = bcm_sysport_rule_set(priv, nfc);
2245                 break;
2246         case ETHTOOL_SRXCLSRLDEL:
2247                 ret = bcm_sysport_rule_del(priv, nfc->fs.location);
2248                 break;
2249         default:
2250                 break;
2251         }
2252
2253         return ret;
2254 }
2255
2256 static const struct ethtool_ops bcm_sysport_ethtool_ops = {
2257         .supported_coalesce_params = ETHTOOL_COALESCE_USECS |
2258                                      ETHTOOL_COALESCE_MAX_FRAMES |
2259                                      ETHTOOL_COALESCE_USE_ADAPTIVE_RX,
2260         .get_drvinfo            = bcm_sysport_get_drvinfo,
2261         .get_msglevel           = bcm_sysport_get_msglvl,
2262         .set_msglevel           = bcm_sysport_set_msglvl,
2263         .get_link               = ethtool_op_get_link,
2264         .get_strings            = bcm_sysport_get_strings,
2265         .get_ethtool_stats      = bcm_sysport_get_stats,
2266         .get_sset_count         = bcm_sysport_get_sset_count,
2267         .get_wol                = bcm_sysport_get_wol,
2268         .set_wol                = bcm_sysport_set_wol,
2269         .get_coalesce           = bcm_sysport_get_coalesce,
2270         .set_coalesce           = bcm_sysport_set_coalesce,
2271         .get_link_ksettings     = phy_ethtool_get_link_ksettings,
2272         .set_link_ksettings     = phy_ethtool_set_link_ksettings,
2273         .get_rxnfc              = bcm_sysport_get_rxnfc,
2274         .set_rxnfc              = bcm_sysport_set_rxnfc,
2275 };
2276
2277 static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb,
2278                                     struct net_device *sb_dev)
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 netdev_pick_tx(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 netdev_pick_tx(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 net_device *dev,
2315                                   struct net_device *slave_dev)
2316 {
2317         struct dsa_port *dp = dsa_port_from_netdev(slave_dev);
2318         struct bcm_sysport_priv *priv = netdev_priv(dev);
2319         struct bcm_sysport_tx_ring *ring;
2320         unsigned int num_tx_queues;
2321         unsigned int q, qp, port;
2322
2323         /* We can't be setting up queue inspection for non directly attached
2324          * switches
2325          */
2326         if (dp->ds->index)
2327                 return 0;
2328
2329         port = dp->index;
2330
2331         /* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a
2332          * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of
2333          * per-port (slave_dev) network devices queue, we achieve just that.
2334          * This need to happen now before any slave network device is used such
2335          * it accurately reflects the number of real TX queues.
2336          */
2337         if (priv->is_lite)
2338                 netif_set_real_num_tx_queues(slave_dev,
2339                                              slave_dev->num_tx_queues / 2);
2340
2341         num_tx_queues = slave_dev->real_num_tx_queues;
2342
2343         if (priv->per_port_num_tx_queues &&
2344             priv->per_port_num_tx_queues != num_tx_queues)
2345                 netdev_warn(slave_dev, "asymmetric number of per-port queues\n");
2346
2347         priv->per_port_num_tx_queues = num_tx_queues;
2348
2349         for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues;
2350              q++) {
2351                 ring = &priv->tx_rings[q];
2352
2353                 if (ring->inspect)
2354                         continue;
2355
2356                 /* Just remember the mapping actual programming done
2357                  * during bcm_sysport_init_tx_ring
2358                  */
2359                 ring->switch_queue = qp;
2360                 ring->switch_port = port;
2361                 ring->inspect = true;
2362                 priv->ring_map[qp + port * num_tx_queues] = ring;
2363                 qp++;
2364         }
2365
2366         return 0;
2367 }
2368
2369 static int bcm_sysport_unmap_queues(struct net_device *dev,
2370                                     struct net_device *slave_dev)
2371 {
2372         struct dsa_port *dp = dsa_port_from_netdev(slave_dev);
2373         struct bcm_sysport_priv *priv = netdev_priv(dev);
2374         struct bcm_sysport_tx_ring *ring;
2375         unsigned int num_tx_queues;
2376         unsigned int q, qp, port;
2377
2378         port = dp->index;
2379
2380         num_tx_queues = slave_dev->real_num_tx_queues;
2381
2382         for (q = 0; q < dev->num_tx_queues; q++) {
2383                 ring = &priv->tx_rings[q];
2384
2385                 if (ring->switch_port != port)
2386                         continue;
2387
2388                 if (!ring->inspect)
2389                         continue;
2390
2391                 ring->inspect = false;
2392                 qp = ring->switch_queue;
2393                 priv->ring_map[qp + port * num_tx_queues] = NULL;
2394         }
2395
2396         return 0;
2397 }
2398
2399 static int bcm_sysport_netdevice_event(struct notifier_block *nb,
2400                                        unsigned long event, void *ptr)
2401 {
2402         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2403         struct netdev_notifier_changeupper_info *info = ptr;
2404         struct bcm_sysport_priv *priv;
2405         int ret = 0;
2406
2407         priv = container_of(nb, struct bcm_sysport_priv, netdev_notifier);
2408         if (priv->netdev != dev)
2409                 return NOTIFY_DONE;
2410
2411         switch (event) {
2412         case NETDEV_CHANGEUPPER:
2413                 if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2414                         return NOTIFY_DONE;
2415
2416                 if (!dsa_slave_dev_check(info->upper_dev))
2417                         return NOTIFY_DONE;
2418
2419                 if (info->linking)
2420                         ret = bcm_sysport_map_queues(dev, info->upper_dev);
2421                 else
2422                         ret = bcm_sysport_unmap_queues(dev, info->upper_dev);
2423                 break;
2424         }
2425
2426         return notifier_from_errno(ret);
2427 }
2428
2429 #define REV_FMT "v%2x.%02x"
2430
2431 static const struct bcm_sysport_hw_params bcm_sysport_params[] = {
2432         [SYSTEMPORT] = {
2433                 .is_lite = false,
2434                 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS,
2435         },
2436         [SYSTEMPORT_LITE] = {
2437                 .is_lite = true,
2438                 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS,
2439         },
2440 };
2441
2442 static const struct of_device_id bcm_sysport_of_match[] = {
2443         { .compatible = "brcm,systemportlite-v1.00",
2444           .data = &bcm_sysport_params[SYSTEMPORT_LITE] },
2445         { .compatible = "brcm,systemport-v1.00",
2446           .data = &bcm_sysport_params[SYSTEMPORT] },
2447         { .compatible = "brcm,systemport",
2448           .data = &bcm_sysport_params[SYSTEMPORT] },
2449         { /* sentinel */ }
2450 };
2451 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
2452
2453 static int bcm_sysport_probe(struct platform_device *pdev)
2454 {
2455         const struct bcm_sysport_hw_params *params;
2456         const struct of_device_id *of_id = NULL;
2457         struct bcm_sysport_priv *priv;
2458         struct device_node *dn;
2459         struct net_device *dev;
2460         const void *macaddr;
2461         u32 txq, rxq;
2462         int ret;
2463
2464         dn = pdev->dev.of_node;
2465         of_id = of_match_node(bcm_sysport_of_match, dn);
2466         if (!of_id || !of_id->data)
2467                 return -EINVAL;
2468
2469         ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
2470         if (ret)
2471                 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2472         if (ret) {
2473                 dev_err(&pdev->dev, "unable to set DMA mask: %d\n", ret);
2474                 return ret;
2475         }
2476
2477         /* Fairly quickly we need to know the type of adapter we have */
2478         params = of_id->data;
2479
2480         /* Read the Transmit/Receive Queue properties */
2481         if (of_property_read_u32(dn, "systemport,num-txq", &txq))
2482                 txq = TDMA_NUM_RINGS;
2483         if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
2484                 rxq = 1;
2485
2486         /* Sanity check the number of transmit queues */
2487         if (!txq || txq > TDMA_NUM_RINGS)
2488                 return -EINVAL;
2489
2490         dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
2491         if (!dev)
2492                 return -ENOMEM;
2493
2494         /* Initialize private members */
2495         priv = netdev_priv(dev);
2496
2497         priv->clk = devm_clk_get_optional(&pdev->dev, "sw_sysport");
2498         if (IS_ERR(priv->clk)) {
2499                 ret = PTR_ERR(priv->clk);
2500                 goto err_free_netdev;
2501         }
2502
2503         /* Allocate number of TX rings */
2504         priv->tx_rings = devm_kcalloc(&pdev->dev, txq,
2505                                       sizeof(struct bcm_sysport_tx_ring),
2506                                       GFP_KERNEL);
2507         if (!priv->tx_rings) {
2508                 ret = -ENOMEM;
2509                 goto err_free_netdev;
2510         }
2511
2512         priv->is_lite = params->is_lite;
2513         priv->num_rx_desc_words = params->num_rx_desc_words;
2514
2515         priv->irq0 = platform_get_irq(pdev, 0);
2516         if (!priv->is_lite) {
2517                 priv->irq1 = platform_get_irq(pdev, 1);
2518                 priv->wol_irq = platform_get_irq(pdev, 2);
2519         } else {
2520                 priv->wol_irq = platform_get_irq(pdev, 1);
2521         }
2522         if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) {
2523                 ret = -EINVAL;
2524                 goto err_free_netdev;
2525         }
2526
2527         priv->base = devm_platform_ioremap_resource(pdev, 0);
2528         if (IS_ERR(priv->base)) {
2529                 ret = PTR_ERR(priv->base);
2530                 goto err_free_netdev;
2531         }
2532
2533         priv->netdev = dev;
2534         priv->pdev = pdev;
2535
2536         ret = of_get_phy_mode(dn, &priv->phy_interface);
2537         /* Default to GMII interface mode */
2538         if (ret)
2539                 priv->phy_interface = PHY_INTERFACE_MODE_GMII;
2540
2541         /* In the case of a fixed PHY, the DT node associated
2542          * to the PHY is the Ethernet MAC DT node.
2543          */
2544         if (of_phy_is_fixed_link(dn)) {
2545                 ret = of_phy_register_fixed_link(dn);
2546                 if (ret) {
2547                         dev_err(&pdev->dev, "failed to register fixed PHY\n");
2548                         goto err_free_netdev;
2549                 }
2550
2551                 priv->phy_dn = dn;
2552         }
2553
2554         /* Initialize netdevice members */
2555         macaddr = of_get_mac_address(dn);
2556         if (IS_ERR(macaddr)) {
2557                 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
2558                 eth_hw_addr_random(dev);
2559         } else {
2560                 ether_addr_copy(dev->dev_addr, macaddr);
2561         }
2562
2563         SET_NETDEV_DEV(dev, &pdev->dev);
2564         dev_set_drvdata(&pdev->dev, dev);
2565         dev->ethtool_ops = &bcm_sysport_ethtool_ops;
2566         dev->netdev_ops = &bcm_sysport_netdev_ops;
2567         netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64);
2568
2569         dev->features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
2570                          NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2571                          NETIF_F_HW_VLAN_CTAG_TX;
2572         dev->hw_features |= dev->features;
2573         dev->vlan_features |= dev->features;
2574         dev->max_mtu = UMAC_MAX_MTU_SIZE;
2575
2576         /* Request the WOL interrupt and advertise suspend if available */
2577         priv->wol_irq_disabled = 1;
2578         ret = devm_request_irq(&pdev->dev, priv->wol_irq,
2579                                bcm_sysport_wol_isr, 0, dev->name, priv);
2580         if (!ret)
2581                 device_set_wakeup_capable(&pdev->dev, 1);
2582
2583         priv->wol_clk = devm_clk_get_optional(&pdev->dev, "sw_sysportwol");
2584         if (IS_ERR(priv->wol_clk))
2585                 return PTR_ERR(priv->wol_clk);
2586
2587         /* Set the needed headroom once and for all */
2588         BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
2589         dev->needed_headroom += sizeof(struct bcm_tsb);
2590
2591         /* libphy will adjust the link state accordingly */
2592         netif_carrier_off(dev);
2593
2594         priv->rx_max_coalesced_frames = 1;
2595         u64_stats_init(&priv->syncp);
2596
2597         priv->netdev_notifier.notifier_call = bcm_sysport_netdevice_event;
2598
2599         ret = register_netdevice_notifier(&priv->netdev_notifier);
2600         if (ret) {
2601                 dev_err(&pdev->dev, "failed to register DSA notifier\n");
2602                 goto err_deregister_fixed_link;
2603         }
2604
2605         ret = register_netdev(dev);
2606         if (ret) {
2607                 dev_err(&pdev->dev, "failed to register net_device\n");
2608                 goto err_deregister_notifier;
2609         }
2610
2611         clk_prepare_enable(priv->clk);
2612
2613         priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
2614         dev_info(&pdev->dev,
2615                  "Broadcom SYSTEMPORT%s " REV_FMT
2616                  " (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
2617                  priv->is_lite ? " Lite" : "",
2618                  (priv->rev >> 8) & 0xff, priv->rev & 0xff,
2619                  priv->irq0, priv->irq1, txq, rxq);
2620
2621         clk_disable_unprepare(priv->clk);
2622
2623         return 0;
2624
2625 err_deregister_notifier:
2626         unregister_netdevice_notifier(&priv->netdev_notifier);
2627 err_deregister_fixed_link:
2628         if (of_phy_is_fixed_link(dn))
2629                 of_phy_deregister_fixed_link(dn);
2630 err_free_netdev:
2631         free_netdev(dev);
2632         return ret;
2633 }
2634
2635 static int bcm_sysport_remove(struct platform_device *pdev)
2636 {
2637         struct net_device *dev = dev_get_drvdata(&pdev->dev);
2638         struct bcm_sysport_priv *priv = netdev_priv(dev);
2639         struct device_node *dn = pdev->dev.of_node;
2640
2641         /* Not much to do, ndo_close has been called
2642          * and we use managed allocations
2643          */
2644         unregister_netdevice_notifier(&priv->netdev_notifier);
2645         unregister_netdev(dev);
2646         if (of_phy_is_fixed_link(dn))
2647                 of_phy_deregister_fixed_link(dn);
2648         free_netdev(dev);
2649         dev_set_drvdata(&pdev->dev, NULL);
2650
2651         return 0;
2652 }
2653
2654 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
2655 {
2656         struct net_device *ndev = priv->netdev;
2657         unsigned int timeout = 1000;
2658         unsigned int index, i = 0;
2659         u32 reg;
2660
2661         reg = umac_readl(priv, UMAC_MPD_CTRL);
2662         if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE))
2663                 reg |= MPD_EN;
2664         reg &= ~PSW_EN;
2665         if (priv->wolopts & WAKE_MAGICSECURE) {
2666                 /* Program the SecureOn password */
2667                 umac_writel(priv, get_unaligned_be16(&priv->sopass[0]),
2668                             UMAC_PSW_MS);
2669                 umac_writel(priv, get_unaligned_be32(&priv->sopass[2]),
2670                             UMAC_PSW_LS);
2671                 reg |= PSW_EN;
2672         }
2673         umac_writel(priv, reg, UMAC_MPD_CTRL);
2674
2675         if (priv->wolopts & WAKE_FILTER) {
2676                 /* Turn on ACPI matching to steal packets from RBUF */
2677                 reg = rbuf_readl(priv, RBUF_CONTROL);
2678                 if (priv->is_lite)
2679                         reg |= RBUF_ACPI_EN_LITE;
2680                 else
2681                         reg |= RBUF_ACPI_EN;
2682                 rbuf_writel(priv, reg, RBUF_CONTROL);
2683
2684                 /* Enable RXCHK, active filters and Broadcom tag matching */
2685                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2686                 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
2687                          RXCHK_BRCM_TAG_MATCH_SHIFT);
2688                 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2689                         reg |= BIT(RXCHK_BRCM_TAG_MATCH_SHIFT + i);
2690                         i++;
2691                 }
2692                 reg |= RXCHK_EN | RXCHK_BRCM_TAG_EN;
2693                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2694         }
2695
2696         /* Make sure RBUF entered WoL mode as result */
2697         do {
2698                 reg = rbuf_readl(priv, RBUF_STATUS);
2699                 if (reg & RBUF_WOL_MODE)
2700                         break;
2701
2702                 udelay(10);
2703         } while (timeout-- > 0);
2704
2705         /* Do not leave the UniMAC RBUF matching only MPD packets */
2706         if (!timeout) {
2707                 mpd_enable_set(priv, false);
2708                 netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
2709                 return -ETIMEDOUT;
2710         }
2711
2712         /* UniMAC receive needs to be turned on */
2713         umac_enable_set(priv, CMD_RX_EN, 1);
2714
2715         netif_dbg(priv, wol, ndev, "entered WOL mode\n");
2716
2717         return 0;
2718 }
2719
2720 static int __maybe_unused bcm_sysport_suspend(struct device *d)
2721 {
2722         struct net_device *dev = dev_get_drvdata(d);
2723         struct bcm_sysport_priv *priv = netdev_priv(dev);
2724         unsigned int i;
2725         int ret = 0;
2726         u32 reg;
2727
2728         if (!netif_running(dev))
2729                 return 0;
2730
2731         netif_device_detach(dev);
2732
2733         bcm_sysport_netif_stop(dev);
2734
2735         phy_suspend(dev->phydev);
2736
2737         /* Disable UniMAC RX */
2738         umac_enable_set(priv, CMD_RX_EN, 0);
2739
2740         ret = rdma_enable_set(priv, 0);
2741         if (ret) {
2742                 netdev_err(dev, "RDMA timeout!\n");
2743                 return ret;
2744         }
2745
2746         /* Disable RXCHK if enabled */
2747         if (priv->rx_chk_en) {
2748                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2749                 reg &= ~RXCHK_EN;
2750                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2751         }
2752
2753         /* Flush RX pipe */
2754         if (!priv->wolopts)
2755                 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
2756
2757         ret = tdma_enable_set(priv, 0);
2758         if (ret) {
2759                 netdev_err(dev, "TDMA timeout!\n");
2760                 return ret;
2761         }
2762
2763         /* Wait for a packet boundary */
2764         usleep_range(2000, 3000);
2765
2766         umac_enable_set(priv, CMD_TX_EN, 0);
2767
2768         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
2769
2770         /* Free RX/TX rings SW structures */
2771         for (i = 0; i < dev->num_tx_queues; i++)
2772                 bcm_sysport_fini_tx_ring(priv, i);
2773         bcm_sysport_fini_rx_ring(priv);
2774
2775         /* Get prepared for Wake-on-LAN */
2776         if (device_may_wakeup(d) && priv->wolopts) {
2777                 clk_prepare_enable(priv->wol_clk);
2778                 ret = bcm_sysport_suspend_to_wol(priv);
2779         }
2780
2781         clk_disable_unprepare(priv->clk);
2782
2783         return ret;
2784 }
2785
2786 static int __maybe_unused bcm_sysport_resume(struct device *d)
2787 {
2788         struct net_device *dev = dev_get_drvdata(d);
2789         struct bcm_sysport_priv *priv = netdev_priv(dev);
2790         unsigned int i;
2791         int ret;
2792
2793         if (!netif_running(dev))
2794                 return 0;
2795
2796         clk_prepare_enable(priv->clk);
2797         if (priv->wolopts)
2798                 clk_disable_unprepare(priv->wol_clk);
2799
2800         umac_reset(priv);
2801
2802         /* Disable the UniMAC RX/TX */
2803         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
2804
2805         /* We may have been suspended and never received a WOL event that
2806          * would turn off MPD detection, take care of that now
2807          */
2808         bcm_sysport_resume_from_wol(priv);
2809
2810         /* Initialize both hardware and software ring */
2811         for (i = 0; i < dev->num_tx_queues; i++) {
2812                 ret = bcm_sysport_init_tx_ring(priv, i);
2813                 if (ret) {
2814                         netdev_err(dev, "failed to initialize TX ring %d\n",
2815                                    i);
2816                         goto out_free_tx_rings;
2817                 }
2818         }
2819
2820         /* Initialize linked-list */
2821         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2822
2823         /* Initialize RX ring */
2824         ret = bcm_sysport_init_rx_ring(priv);
2825         if (ret) {
2826                 netdev_err(dev, "failed to initialize RX ring\n");
2827                 goto out_free_rx_ring;
2828         }
2829
2830         /* RX pipe enable */
2831         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2832
2833         ret = rdma_enable_set(priv, 1);
2834         if (ret) {
2835                 netdev_err(dev, "failed to enable RDMA\n");
2836                 goto out_free_rx_ring;
2837         }
2838
2839         /* Restore enabled features */
2840         bcm_sysport_set_features(dev, dev->features);
2841
2842         rbuf_init(priv);
2843
2844         /* Set maximum frame length */
2845         if (!priv->is_lite)
2846                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2847         else
2848                 gib_set_pad_extension(priv);
2849
2850         /* Set MAC address */
2851         umac_set_hw_addr(priv, dev->dev_addr);
2852
2853         umac_enable_set(priv, CMD_RX_EN, 1);
2854
2855         /* TX pipe enable */
2856         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2857
2858         umac_enable_set(priv, CMD_TX_EN, 1);
2859
2860         ret = tdma_enable_set(priv, 1);
2861         if (ret) {
2862                 netdev_err(dev, "TDMA timeout!\n");
2863                 goto out_free_rx_ring;
2864         }
2865
2866         phy_resume(dev->phydev);
2867
2868         bcm_sysport_netif_start(dev);
2869
2870         netif_device_attach(dev);
2871
2872         return 0;
2873
2874 out_free_rx_ring:
2875         bcm_sysport_fini_rx_ring(priv);
2876 out_free_tx_rings:
2877         for (i = 0; i < dev->num_tx_queues; i++)
2878                 bcm_sysport_fini_tx_ring(priv, i);
2879         clk_disable_unprepare(priv->clk);
2880         return ret;
2881 }
2882
2883 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2884                 bcm_sysport_suspend, bcm_sysport_resume);
2885
2886 static struct platform_driver bcm_sysport_driver = {
2887         .probe  = bcm_sysport_probe,
2888         .remove = bcm_sysport_remove,
2889         .driver =  {
2890                 .name = "brcm-systemport",
2891                 .of_match_table = bcm_sysport_of_match,
2892                 .pm = &bcm_sysport_pm_ops,
2893         },
2894 };
2895 module_platform_driver(bcm_sysport_driver);
2896
2897 MODULE_AUTHOR("Broadcom Corporation");
2898 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2899 MODULE_ALIAS("platform:brcm-systemport");
2900 MODULE_LICENSE("GPL");