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                                     struct kernel_ethtool_coalesce *kernel_coal,
 612                                     struct netlink_ext_ack *extack)
 613 {
 614         struct bcm_sysport_priv *priv = netdev_priv(dev);
 615         u32 reg;
 616
 617         reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0));
 618
 619         ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000;
 620         ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK;
 621
 622         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 623
 624         ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000;
 625         ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK;
 626         ec->use_adaptive_rx_coalesce = priv->dim.use_dim;
 627
 628         return 0;
 629 }
 630
 631 static int bcm_sysport_set_coalesce(struct net_device *dev,
 632                                     struct ethtool_coalesce *ec,
 633                                     struct kernel_ethtool_coalesce *kernel_coal,
 634                                     struct netlink_ext_ack *extack)
 635 {
 636         struct bcm_sysport_priv *priv = netdev_priv(dev);
 637         struct dim_cq_moder moder;
 638         u32 usecs, pkts;
 639         unsigned int i;
 640
 641         /* Base system clock is 125Mhz, DMA timeout is this reference clock
 642          * divided by 1024, which yield roughly 8.192 us, our maximum value has
 643          * to fit in the RING_TIMEOUT_MASK (16 bits).
 644          */
 645         if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
 646             ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
 647             ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
 648             ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
 649                 return -EINVAL;
 650
 651         if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
 652             (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0))
 653                 return -EINVAL;
 654
 655         for (i = 0; i < dev->num_tx_queues; i++)
 656                 bcm_sysport_set_tx_coalesce(&priv->tx_rings[i], ec);
 657
 658         priv->rx_coalesce_usecs = ec->rx_coalesce_usecs;
 659         priv->rx_max_coalesced_frames = ec->rx_max_coalesced_frames;
 660         usecs = priv->rx_coalesce_usecs;
 661         pkts = priv->rx_max_coalesced_frames;
 662
 663         if (ec->use_adaptive_rx_coalesce && !priv->dim.use_dim) {
 664                 moder = net_dim_get_def_rx_moderation(priv->dim.dim.mode);
 665                 usecs = moder.usec;
 666                 pkts = moder.pkts;
 667         }
 668
 669         priv->dim.use_dim = ec->use_adaptive_rx_coalesce;
 670
 671         /* Apply desired coalescing parameters */
 672         bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
 673
 674         return 0;
 675 }
 676
 677 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
 678 {
 679         dev_consume_skb_any(cb->skb);
 680         cb->skb = NULL;
 681         dma_unmap_addr_set(cb, dma_addr, 0);
 682 }
 683
 684 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
 685                                              struct bcm_sysport_cb *cb)
 686 {
 687         struct device *kdev = &priv->pdev->dev;
 688         struct net_device *ndev = priv->netdev;
 689         struct sk_buff *skb, *rx_skb;
 690         dma_addr_t mapping;
 691
 692         /* Allocate a new SKB for a new packet */
 693         skb = __netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH,
 694                                  GFP_ATOMIC | __GFP_NOWARN);
 695         if (!skb) {
 696                 priv->mib.alloc_rx_buff_failed++;
 697                 netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
 698                 return NULL;
 699         }
 700
 701         mapping = dma_map_single(kdev, skb->data,
 702                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 703         if (dma_mapping_error(kdev, mapping)) {
 704                 priv->mib.rx_dma_failed++;
 705                 dev_kfree_skb_any(skb);
 706                 netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
 707                 return NULL;
 708         }
 709
 710         /* Grab the current SKB on the ring */
 711         rx_skb = cb->skb;
 712         if (likely(rx_skb))
 713                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 714                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 715
 716         /* Put the new SKB on the ring */
 717         cb->skb = skb;
 718         dma_unmap_addr_set(cb, dma_addr, mapping);
 719         dma_desc_set_addr(priv, cb->bd_addr, mapping);
 720
 721         netif_dbg(priv, rx_status, ndev, "RX refill\n");
 722
 723         /* Return the current SKB to the caller */
 724         return rx_skb;
 725 }
 726
 727 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
 728 {
 729         struct bcm_sysport_cb *cb;
 730         struct sk_buff *skb;
 731         unsigned int i;
 732
 733         for (i = 0; i < priv->num_rx_bds; i++) {
 734                 cb = &priv->rx_cbs[i];
 735                 skb = bcm_sysport_rx_refill(priv, cb);
 736                 dev_kfree_skb(skb);
 737                 if (!cb->skb)
 738                         return -ENOMEM;
 739         }
 740
 741         return 0;
 742 }
 743
 744 /* Poll the hardware for up to budget packets to process */
 745 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
 746                                         unsigned int budget)
 747 {
 748         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
 749         struct net_device *ndev = priv->netdev;
 750         unsigned int processed = 0, to_process;
 751         unsigned int processed_bytes = 0;
 752         struct bcm_sysport_cb *cb;
 753         struct sk_buff *skb;
 754         unsigned int p_index;
 755         u16 len, status;
 756         struct bcm_rsb *rsb;
 757
 758         /* Clear status before servicing to reduce spurious interrupts */
 759         intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR);
 760
 761         /* Determine how much we should process since last call, SYSTEMPORT Lite
 762          * groups the producer and consumer indexes into the same 32-bit
 763          * which we access using RDMA_CONS_INDEX
 764          */
 765         if (!priv->is_lite)
 766                 p_index = rdma_readl(priv, RDMA_PROD_INDEX);
 767         else
 768                 p_index = rdma_readl(priv, RDMA_CONS_INDEX);
 769         p_index &= RDMA_PROD_INDEX_MASK;
 770
 771         to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK;
 772
 773         netif_dbg(priv, rx_status, ndev,
 774                   "p_index=%d rx_c_index=%d to_process=%d\n",
 775                   p_index, priv->rx_c_index, to_process);
 776
 777         while ((processed < to_process) && (processed < budget)) {
 778                 cb = &priv->rx_cbs[priv->rx_read_ptr];
 779                 skb = bcm_sysport_rx_refill(priv, cb);
 780
 781
 782                 /* We do not have a backing SKB, so we do not a corresponding
 783                  * DMA mapping for this incoming packet since
 784                  * bcm_sysport_rx_refill always either has both skb and mapping
 785                  * or none.
 786                  */
 787                 if (unlikely(!skb)) {
 788                         netif_err(priv, rx_err, ndev, "out of memory!\n");
 789                         ndev->stats.rx_dropped++;
 790                         ndev->stats.rx_errors++;
 791                         goto next;
 792                 }
 793
 794                 /* Extract the Receive Status Block prepended */
 795                 rsb = (struct bcm_rsb *)skb->data;
 796                 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
 797                 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
 798                           DESC_STATUS_MASK;
 799
 800                 netif_dbg(priv, rx_status, ndev,
 801                           "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
 802                           p_index, priv->rx_c_index, priv->rx_read_ptr,
 803                           len, status);
 804
 805                 if (unlikely(len > RX_BUF_LENGTH)) {
 806                         netif_err(priv, rx_status, ndev, "oversized packet\n");
 807                         ndev->stats.rx_length_errors++;
 808                         ndev->stats.rx_errors++;
 809                         dev_kfree_skb_any(skb);
 810                         goto next;
 811                 }
 812
 813                 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
 814                         netif_err(priv, rx_status, ndev, "fragmented packet!\n");
 815                         ndev->stats.rx_dropped++;
 816                         ndev->stats.rx_errors++;
 817                         dev_kfree_skb_any(skb);
 818                         goto next;
 819                 }
 820
 821                 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
 822                         netif_err(priv, rx_err, ndev, "error packet\n");
 823                         if (status & RX_STATUS_OVFLOW)
 824                                 ndev->stats.rx_over_errors++;
 825                         ndev->stats.rx_dropped++;
 826                         ndev->stats.rx_errors++;
 827                         dev_kfree_skb_any(skb);
 828                         goto next;
 829                 }
 830
 831                 skb_put(skb, len);
 832
 833                 /* Hardware validated our checksum */
 834                 if (likely(status & DESC_L4_CSUM))
 835                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 836
 837                 /* Hardware pre-pends packets with 2bytes before Ethernet
 838                  * header plus we have the Receive Status Block, strip off all
 839                  * of this from the SKB.
 840                  */
 841                 skb_pull(skb, sizeof(*rsb) + 2);
 842                 len -= (sizeof(*rsb) + 2);
 843                 processed_bytes += len;
 844
 845                 /* UniMAC may forward CRC */
 846                 if (priv->crc_fwd) {
 847                         skb_trim(skb, len - ETH_FCS_LEN);
 848                         len -= ETH_FCS_LEN;
 849                 }
 850
 851                 skb->protocol = eth_type_trans(skb, ndev);
 852                 ndev->stats.rx_packets++;
 853                 ndev->stats.rx_bytes += len;
 854                 u64_stats_update_begin(&priv->syncp);
 855                 stats64->rx_packets++;
 856                 stats64->rx_bytes += len;
 857                 u64_stats_update_end(&priv->syncp);
 858
 859                 napi_gro_receive(&priv->napi, skb);
 860 next:
 861                 processed++;
 862                 priv->rx_read_ptr++;
 863
 864                 if (priv->rx_read_ptr == priv->num_rx_bds)
 865                         priv->rx_read_ptr = 0;
 866         }
 867
 868         priv->dim.packets = processed;
 869         priv->dim.bytes = processed_bytes;
 870
 871         return processed;
 872 }
 873
 874 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring,
 875                                        struct bcm_sysport_cb *cb,
 876                                        unsigned int *bytes_compl,
 877                                        unsigned int *pkts_compl)
 878 {
 879         struct bcm_sysport_priv *priv = ring->priv;
 880         struct device *kdev = &priv->pdev->dev;
 881
 882         if (cb->skb) {
 883                 *bytes_compl += cb->skb->len;
 884                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 885                                  dma_unmap_len(cb, dma_len),
 886                                  DMA_TO_DEVICE);
 887                 (*pkts_compl)++;
 888                 bcm_sysport_free_cb(cb);
 889         /* SKB fragment */
 890         } else if (dma_unmap_addr(cb, dma_addr)) {
 891                 *bytes_compl += dma_unmap_len(cb, dma_len);
 892                 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
 893                                dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
 894                 dma_unmap_addr_set(cb, dma_addr, 0);
 895         }
 896 }
 897
 898 /* Reclaim queued SKBs for transmission completion, lockless version */
 899 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 900                                              struct bcm_sysport_tx_ring *ring)
 901 {
 902         unsigned int pkts_compl = 0, bytes_compl = 0;
 903         struct net_device *ndev = priv->netdev;
 904         unsigned int txbds_processed = 0;
 905         struct bcm_sysport_cb *cb;
 906         unsigned int txbds_ready;
 907         unsigned int c_index;
 908         u32 hw_ind;
 909
 910         /* Clear status before servicing to reduce spurious interrupts */
 911         if (!ring->priv->is_lite)
 912                 intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR);
 913         else
 914                 intrl2_0_writel(ring->priv, BIT(ring->index +
 915                                 INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR);
 916
 917         /* Compute how many descriptors have been processed since last call */
 918         hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
 919         c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
 920         txbds_ready = (c_index - ring->c_index) & RING_CONS_INDEX_MASK;
 921
 922         netif_dbg(priv, tx_done, ndev,
 923                   "ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
 924                   ring->index, ring->c_index, c_index, txbds_ready);
 925
 926         while (txbds_processed < txbds_ready) {
 927                 cb = &ring->cbs[ring->clean_index];
 928                 bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl);
 929
 930                 ring->desc_count++;
 931                 txbds_processed++;
 932
 933                 if (likely(ring->clean_index < ring->size - 1))
 934                         ring->clean_index++;
 935                 else
 936                         ring->clean_index = 0;
 937         }
 938
 939         u64_stats_update_begin(&priv->syncp);
 940         ring->packets += pkts_compl;
 941         ring->bytes += bytes_compl;
 942         u64_stats_update_end(&priv->syncp);
 943
 944         ring->c_index = c_index;
 945
 946         netif_dbg(priv, tx_done, ndev,
 947                   "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
 948                   ring->index, ring->c_index, pkts_compl, bytes_compl);
 949
 950         return pkts_compl;
 951 }
 952
 953 /* Locked version of the per-ring TX reclaim routine */
 954 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 955                                            struct bcm_sysport_tx_ring *ring)
 956 {
 957         struct netdev_queue *txq;
 958         unsigned int released;
 959         unsigned long flags;
 960
 961         txq = netdev_get_tx_queue(priv->netdev, ring->index);
 962
 963         spin_lock_irqsave(&ring->lock, flags);
 964         released = __bcm_sysport_tx_reclaim(priv, ring);
 965         if (released)
 966                 netif_tx_wake_queue(txq);
 967
 968         spin_unlock_irqrestore(&ring->lock, flags);
 969
 970         return released;
 971 }
 972
 973 /* Locked version of the per-ring TX reclaim, but does not wake the queue */
 974 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv,
 975                                  struct bcm_sysport_tx_ring *ring)
 976 {
 977         unsigned long flags;
 978
 979         spin_lock_irqsave(&ring->lock, flags);
 980         __bcm_sysport_tx_reclaim(priv, ring);
 981         spin_unlock_irqrestore(&ring->lock, flags);
 982 }
 983
 984 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
 985 {
 986         struct bcm_sysport_tx_ring *ring =
 987                 container_of(napi, struct bcm_sysport_tx_ring, napi);
 988         unsigned int work_done = 0;
 989
 990         work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
 991
 992         if (work_done == 0) {
 993                 napi_complete(napi);
 994                 /* re-enable TX interrupt */
 995                 if (!ring->priv->is_lite)
 996                         intrl2_1_mask_clear(ring->priv, BIT(ring->index));
 997                 else
 998                         intrl2_0_mask_clear(ring->priv, BIT(ring->index +
 999                                             INTRL2_0_TDMA_MBDONE_SHIFT));
1000
1001                 return 0;
1002         }
1003
1004         return budget;
1005 }
1006
1007 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
1008 {
1009         unsigned int q;
1010
1011         for (q = 0; q < priv->netdev->num_tx_queues; q++)
1012                 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
1013 }
1014
1015 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
1016 {
1017         struct bcm_sysport_priv *priv =
1018                 container_of(napi, struct bcm_sysport_priv, napi);
1019         struct dim_sample dim_sample = {};
1020         unsigned int work_done = 0;
1021
1022         work_done = bcm_sysport_desc_rx(priv, budget);
1023
1024         priv->rx_c_index += work_done;
1025         priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
1026
1027         /* SYSTEMPORT Lite groups the producer/consumer index, producer is
1028          * maintained by HW, but writes to it will be ignore while RDMA
1029          * is active
1030          */
1031         if (!priv->is_lite)
1032                 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
1033         else
1034                 rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX);
1035
1036         if (work_done < budget) {
1037                 napi_complete_done(napi, work_done);
1038                 /* re-enable RX interrupts */
1039                 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
1040         }
1041
1042         if (priv->dim.use_dim) {
1043                 dim_update_sample(priv->dim.event_ctr, priv->dim.packets,
1044                                   priv->dim.bytes, &dim_sample);
1045                 net_dim(&priv->dim.dim, dim_sample);
1046         }
1047
1048         return work_done;
1049 }
1050
1051 static void mpd_enable_set(struct bcm_sysport_priv *priv, bool enable)
1052 {
1053         u32 reg, bit;
1054
1055         reg = umac_readl(priv, UMAC_MPD_CTRL);
1056         if (enable)
1057                 reg |= MPD_EN;
1058         else
1059                 reg &= ~MPD_EN;
1060         umac_writel(priv, reg, UMAC_MPD_CTRL);
1061
1062         if (priv->is_lite)
1063                 bit = RBUF_ACPI_EN_LITE;
1064         else
1065                 bit = RBUF_ACPI_EN;
1066
1067         reg = rbuf_readl(priv, RBUF_CONTROL);
1068         if (enable)
1069                 reg |= bit;
1070         else
1071                 reg &= ~bit;
1072         rbuf_writel(priv, reg, RBUF_CONTROL);
1073 }
1074
1075 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
1076 {
1077         unsigned int index;
1078         u32 reg;
1079
1080         /* Disable RXCHK, active filters and Broadcom tag matching */
1081         reg = rxchk_readl(priv, RXCHK_CONTROL);
1082         reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
1083                  RXCHK_BRCM_TAG_MATCH_SHIFT | RXCHK_EN | RXCHK_BRCM_TAG_EN);
1084         rxchk_writel(priv, reg, RXCHK_CONTROL);
1085
1086         /* Make sure we restore correct CID index in case HW lost
1087          * its context during deep idle state
1088          */
1089         for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
1090                 rxchk_writel(priv, priv->filters_loc[index] <<
1091                              RXCHK_BRCM_TAG_CID_SHIFT, RXCHK_BRCM_TAG(index));
1092                 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
1093         }
1094
1095         /* Clear the MagicPacket detection logic */
1096         mpd_enable_set(priv, false);
1097
1098         reg = intrl2_0_readl(priv, INTRL2_CPU_STATUS);
1099         if (reg & INTRL2_0_MPD)
1100                 netdev_info(priv->netdev, "Wake-on-LAN (MPD) interrupt!\n");
1101
1102         if (reg & INTRL2_0_BRCM_MATCH_TAG) {
1103                 reg = rxchk_readl(priv, RXCHK_BRCM_TAG_MATCH_STATUS) &
1104                                   RXCHK_BRCM_TAG_MATCH_MASK;
1105                 netdev_info(priv->netdev,
1106                             "Wake-on-LAN (filters 0x%02x) interrupt!\n", reg);
1107         }
1108
1109         netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
1110 }
1111
1112 static void bcm_sysport_dim_work(struct work_struct *work)
1113 {
1114         struct dim *dim = container_of(work, struct dim, work);
1115         struct bcm_sysport_net_dim *ndim =
1116                         container_of(dim, struct bcm_sysport_net_dim, dim);
1117         struct bcm_sysport_priv *priv =
1118                         container_of(ndim, struct bcm_sysport_priv, dim);
1119         struct dim_cq_moder cur_profile = net_dim_get_rx_moderation(dim->mode,
1120                                                                     dim->profile_ix);
1121
1122         bcm_sysport_set_rx_coalesce(priv, cur_profile.usec, cur_profile.pkts);
1123         dim->state = DIM_START_MEASURE;
1124 }
1125
1126 /* RX and misc interrupt routine */
1127 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
1128 {
1129         struct net_device *dev = dev_id;
1130         struct bcm_sysport_priv *priv = netdev_priv(dev);
1131         struct bcm_sysport_tx_ring *txr;
1132         unsigned int ring, ring_bit;
1133
1134         priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
1135                           ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
1136         intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
1137
1138         if (unlikely(priv->irq0_stat == 0)) {
1139                 netdev_warn(priv->netdev, "spurious RX interrupt\n");
1140                 return IRQ_NONE;
1141         }
1142
1143         if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
1144                 priv->dim.event_ctr++;
1145                 if (likely(napi_schedule_prep(&priv->napi))) {
1146                         /* disable RX interrupts */
1147                         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
1148                         __napi_schedule_irqoff(&priv->napi);
1149                 }
1150         }
1151
1152         /* TX ring is full, perform a full reclaim since we do not know
1153          * which one would trigger this interrupt
1154          */
1155         if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
1156                 bcm_sysport_tx_reclaim_all(priv);
1157
1158         if (!priv->is_lite)
1159                 goto out;
1160
1161         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1162                 ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT);
1163                 if (!(priv->irq0_stat & ring_bit))
1164                         continue;
1165
1166                 txr = &priv->tx_rings[ring];
1167
1168                 if (likely(napi_schedule_prep(&txr->napi))) {
1169                         intrl2_0_mask_set(priv, ring_bit);
1170                         __napi_schedule(&txr->napi);
1171                 }
1172         }
1173 out:
1174         return IRQ_HANDLED;
1175 }
1176
1177 /* TX interrupt service routine */
1178 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
1179 {
1180         struct net_device *dev = dev_id;
1181         struct bcm_sysport_priv *priv = netdev_priv(dev);
1182         struct bcm_sysport_tx_ring *txr;
1183         unsigned int ring;
1184
1185         priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
1186                                 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
1187         intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1188
1189         if (unlikely(priv->irq1_stat == 0)) {
1190                 netdev_warn(priv->netdev, "spurious TX interrupt\n");
1191                 return IRQ_NONE;
1192         }
1193
1194         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1195                 if (!(priv->irq1_stat & BIT(ring)))
1196                         continue;
1197
1198                 txr = &priv->tx_rings[ring];
1199
1200                 if (likely(napi_schedule_prep(&txr->napi))) {
1201                         intrl2_1_mask_set(priv, BIT(ring));
1202                         __napi_schedule_irqoff(&txr->napi);
1203                 }
1204         }
1205
1206         return IRQ_HANDLED;
1207 }
1208
1209 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
1210 {
1211         struct bcm_sysport_priv *priv = dev_id;
1212
1213         pm_wakeup_event(&priv->pdev->dev, 0);
1214
1215         return IRQ_HANDLED;
1216 }
1217
1218 #ifdef CONFIG_NET_POLL_CONTROLLER
1219 static void bcm_sysport_poll_controller(struct net_device *dev)
1220 {
1221         struct bcm_sysport_priv *priv = netdev_priv(dev);
1222
1223         disable_irq(priv->irq0);
1224         bcm_sysport_rx_isr(priv->irq0, priv);
1225         enable_irq(priv->irq0);
1226
1227         if (!priv->is_lite) {
1228                 disable_irq(priv->irq1);
1229                 bcm_sysport_tx_isr(priv->irq1, priv);
1230                 enable_irq(priv->irq1);
1231         }
1232 }
1233 #endif
1234
1235 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
1236                                               struct net_device *dev)
1237 {
1238         struct bcm_sysport_priv *priv = netdev_priv(dev);
1239         struct sk_buff *nskb;
1240         struct bcm_tsb *tsb;
1241         u32 csum_info;
1242         u8 ip_proto;
1243         u16 csum_start;
1244         __be16 ip_ver;
1245
1246         /* Re-allocate SKB if needed */
1247         if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
1248                 nskb = skb_realloc_headroom(skb, sizeof(*tsb));
1249                 if (!nskb) {
1250                         dev_kfree_skb_any(skb);
1251                         priv->mib.tx_realloc_tsb_failed++;
1252                         dev->stats.tx_errors++;
1253                         dev->stats.tx_dropped++;
1254                         return NULL;
1255                 }
1256                 dev_consume_skb_any(skb);
1257                 skb = nskb;
1258                 priv->mib.tx_realloc_tsb++;
1259         }
1260
1261         tsb = skb_push(skb, sizeof(*tsb));
1262         /* Zero-out TSB by default */
1263         memset(tsb, 0, sizeof(*tsb));
1264
1265         if (skb_vlan_tag_present(skb)) {
1266                 tsb->pcp_dei_vid = skb_vlan_tag_get_prio(skb) & PCP_DEI_MASK;
1267                 tsb->pcp_dei_vid |= (u32)skb_vlan_tag_get_id(skb) << VID_SHIFT;
1268         }
1269
1270         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1271                 ip_ver = skb->protocol;
1272                 switch (ip_ver) {
1273                 case htons(ETH_P_IP):
1274                         ip_proto = ip_hdr(skb)->protocol;
1275                         break;
1276                 case htons(ETH_P_IPV6):
1277                         ip_proto = ipv6_hdr(skb)->nexthdr;
1278                         break;
1279                 default:
1280                         return skb;
1281                 }
1282
1283                 /* Get the checksum offset and the L4 (transport) offset */
1284                 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
1285                 /* Account for the HW inserted VLAN tag */
1286                 if (skb_vlan_tag_present(skb))
1287                         csum_start += VLAN_HLEN;
1288                 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
1289                 csum_info |= (csum_start << L4_PTR_SHIFT);
1290
1291                 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1292                         csum_info |= L4_LENGTH_VALID;
1293                         if (ip_proto == IPPROTO_UDP &&
1294                             ip_ver == htons(ETH_P_IP))
1295                                 csum_info |= L4_UDP;
1296                 } else {
1297                         csum_info = 0;
1298                 }
1299
1300                 tsb->l4_ptr_dest_map = csum_info;
1301         }
1302
1303         return skb;
1304 }
1305
1306 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
1307                                     struct net_device *dev)
1308 {
1309         struct bcm_sysport_priv *priv = netdev_priv(dev);
1310         struct device *kdev = &priv->pdev->dev;
1311         struct bcm_sysport_tx_ring *ring;
1312         unsigned long flags, desc_flags;
1313         struct bcm_sysport_cb *cb;
1314         struct netdev_queue *txq;
1315         u32 len_status, addr_lo;
1316         unsigned int skb_len;
1317         dma_addr_t mapping;
1318         u16 queue;
1319         int ret;
1320
1321         queue = skb_get_queue_mapping(skb);
1322         txq = netdev_get_tx_queue(dev, queue);
1323         ring = &priv->tx_rings[queue];
1324
1325         /* lock against tx reclaim in BH context and TX ring full interrupt */
1326         spin_lock_irqsave(&ring->lock, flags);
1327         if (unlikely(ring->desc_count == 0)) {
1328                 netif_tx_stop_queue(txq);
1329                 netdev_err(dev, "queue %d awake and ring full!\n", queue);
1330                 ret = NETDEV_TX_BUSY;
1331                 goto out;
1332         }
1333
1334         /* Insert TSB and checksum infos */
1335         if (priv->tsb_en) {
1336                 skb = bcm_sysport_insert_tsb(skb, dev);
1337                 if (!skb) {
1338                         ret = NETDEV_TX_OK;
1339                         goto out;
1340                 }
1341         }
1342
1343         skb_len = skb->len;
1344
1345         mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1346         if (dma_mapping_error(kdev, mapping)) {
1347                 priv->mib.tx_dma_failed++;
1348                 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
1349                           skb->data, skb_len);
1350                 ret = NETDEV_TX_OK;
1351                 goto out;
1352         }
1353
1354         /* Remember the SKB for future freeing */
1355         cb = &ring->cbs[ring->curr_desc];
1356         cb->skb = skb;
1357         dma_unmap_addr_set(cb, dma_addr, mapping);
1358         dma_unmap_len_set(cb, dma_len, skb_len);
1359
1360         addr_lo = lower_32_bits(mapping);
1361         len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
1362         len_status |= (skb_len << DESC_LEN_SHIFT);
1363         len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
1364                        DESC_STATUS_SHIFT;
1365         if (skb->ip_summed == CHECKSUM_PARTIAL)
1366                 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1367         if (skb_vlan_tag_present(skb))
1368                 len_status |= (TX_STATUS_VLAN_VID_TSB << DESC_STATUS_SHIFT);
1369
1370         ring->curr_desc++;
1371         if (ring->curr_desc == ring->size)
1372                 ring->curr_desc = 0;
1373         ring->desc_count--;
1374
1375         /* Ports are latched, so write upper address first */
1376         spin_lock_irqsave(&priv->desc_lock, desc_flags);
1377         tdma_writel(priv, len_status, TDMA_WRITE_PORT_HI(ring->index));
1378         tdma_writel(priv, addr_lo, TDMA_WRITE_PORT_LO(ring->index));
1379         spin_unlock_irqrestore(&priv->desc_lock, desc_flags);
1380
1381         /* Check ring space and update SW control flow */
1382         if (ring->desc_count == 0)
1383                 netif_tx_stop_queue(txq);
1384
1385         netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
1386                   ring->index, ring->desc_count, ring->curr_desc);
1387
1388         ret = NETDEV_TX_OK;
1389 out:
1390         spin_unlock_irqrestore(&ring->lock, flags);
1391         return ret;
1392 }
1393
1394 static void bcm_sysport_tx_timeout(struct net_device *dev, unsigned int txqueue)
1395 {
1396         netdev_warn(dev, "transmit timeout!\n");
1397
1398         netif_trans_update(dev);
1399         dev->stats.tx_errors++;
1400
1401         netif_tx_wake_all_queues(dev);
1402 }
1403
1404 /* phylib adjust link callback */
1405 static void bcm_sysport_adj_link(struct net_device *dev)
1406 {
1407         struct bcm_sysport_priv *priv = netdev_priv(dev);
1408         struct phy_device *phydev = dev->phydev;
1409         unsigned int changed = 0;
1410         u32 cmd_bits = 0, reg;
1411
1412         if (priv->old_link != phydev->link) {
1413                 changed = 1;
1414                 priv->old_link = phydev->link;
1415         }
1416
1417         if (priv->old_duplex != phydev->duplex) {
1418                 changed = 1;
1419                 priv->old_duplex = phydev->duplex;
1420         }
1421
1422         if (priv->is_lite)
1423                 goto out;
1424
1425         switch (phydev->speed) {
1426         case SPEED_2500:
1427                 cmd_bits = CMD_SPEED_2500;
1428                 break;
1429         case SPEED_1000:
1430                 cmd_bits = CMD_SPEED_1000;
1431                 break;
1432         case SPEED_100:
1433                 cmd_bits = CMD_SPEED_100;
1434                 break;
1435         case SPEED_10:
1436                 cmd_bits = CMD_SPEED_10;
1437                 break;
1438         default:
1439                 break;
1440         }
1441         cmd_bits <<= CMD_SPEED_SHIFT;
1442
1443         if (phydev->duplex == DUPLEX_HALF)
1444                 cmd_bits |= CMD_HD_EN;
1445
1446         if (priv->old_pause != phydev->pause) {
1447                 changed = 1;
1448                 priv->old_pause = phydev->pause;
1449         }
1450
1451         if (!phydev->pause)
1452                 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1453
1454         if (!changed)
1455                 return;
1456
1457         if (phydev->link) {
1458                 reg = umac_readl(priv, UMAC_CMD);
1459                 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
1460                         CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1461                         CMD_TX_PAUSE_IGNORE);
1462                 reg |= cmd_bits;
1463                 umac_writel(priv, reg, UMAC_CMD);
1464         }
1465 out:
1466         if (changed)
1467                 phy_print_status(phydev);
1468 }
1469
1470 static void bcm_sysport_init_dim(struct bcm_sysport_priv *priv,
1471                                  void (*cb)(struct work_struct *work))
1472 {
1473         struct bcm_sysport_net_dim *dim = &priv->dim;
1474
1475         INIT_WORK(&dim->dim.work, cb);
1476         dim->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1477         dim->event_ctr = 0;
1478         dim->packets = 0;
1479         dim->bytes = 0;
1480 }
1481
1482 static void bcm_sysport_init_rx_coalesce(struct bcm_sysport_priv *priv)
1483 {
1484         struct bcm_sysport_net_dim *dim = &priv->dim;
1485         struct dim_cq_moder moder;
1486         u32 usecs, pkts;
1487
1488         usecs = priv->rx_coalesce_usecs;
1489         pkts = priv->rx_max_coalesced_frames;
1490
1491         /* If DIM was enabled, re-apply default parameters */
1492         if (dim->use_dim) {
1493                 moder = net_dim_get_def_rx_moderation(dim->dim.mode);
1494                 usecs = moder.usec;
1495                 pkts = moder.pkts;
1496         }
1497
1498         bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
1499 }
1500
1501 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1502                                     unsigned int index)
1503 {
1504         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1505         size_t size;
1506         u32 reg;
1507
1508         /* Simple descriptors partitioning for now */
1509         size = 256;
1510
1511         ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1512         if (!ring->cbs) {
1513                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1514                 return -ENOMEM;
1515         }
1516
1517         /* Initialize SW view of the ring */
1518         spin_lock_init(&ring->lock);
1519         ring->priv = priv;
1520         netif_napi_add_tx(priv->netdev, &ring->napi, bcm_sysport_tx_poll);
1521         ring->index = index;
1522         ring->size = size;
1523         ring->clean_index = 0;
1524         ring->alloc_size = ring->size;
1525         ring->desc_count = ring->size;
1526         ring->curr_desc = 0;
1527
1528         /* Initialize HW ring */
1529         tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1530         tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1531         tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1532         tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1533
1534         /* Configure QID and port mapping */
1535         reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index));
1536         reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT);
1537         if (ring->inspect) {
1538                 reg |= ring->switch_queue & RING_QID_MASK;
1539                 reg |= ring->switch_port << RING_PORT_ID_SHIFT;
1540         } else {
1541                 reg |= RING_IGNORE_STATUS;
1542         }
1543         tdma_writel(priv, reg, TDMA_DESC_RING_MAPPING(index));
1544         reg = 0;
1545         /* Adjust the packet size calculations if SYSTEMPORT is responsible
1546          * for HW insertion of VLAN tags
1547          */
1548         if (priv->netdev->features & NETIF_F_HW_VLAN_CTAG_TX)
1549                 reg = VLAN_HLEN << RING_PKT_SIZE_ADJ_SHIFT;
1550         tdma_writel(priv, reg, TDMA_DESC_RING_PCP_DEI_VID(index));
1551
1552         /* Enable ACB algorithm 2 */
1553         reg = tdma_readl(priv, TDMA_CONTROL);
1554         reg |= tdma_control_bit(priv, ACB_ALGO);
1555         tdma_writel(priv, reg, TDMA_CONTROL);
1556
1557         /* Do not use tdma_control_bit() here because TSB_SWAP1 collides
1558          * with the original definition of ACB_ALGO
1559          */
1560         reg = tdma_readl(priv, TDMA_CONTROL);
1561         if (priv->is_lite)
1562                 reg &= ~BIT(TSB_SWAP1);
1563         /* Set a correct TSB format based on host endian */
1564         if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1565                 reg |= tdma_control_bit(priv, TSB_SWAP0);
1566         else
1567                 reg &= ~tdma_control_bit(priv, TSB_SWAP0);
1568         tdma_writel(priv, reg, TDMA_CONTROL);
1569
1570         /* Program the number of descriptors as MAX_THRESHOLD and half of
1571          * its size for the hysteresis trigger
1572          */
1573         tdma_writel(priv, ring->size |
1574                         1 << RING_HYST_THRESH_SHIFT,
1575                         TDMA_DESC_RING_MAX_HYST(index));
1576
1577         /* Enable the ring queue in the arbiter */
1578         reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1579         reg |= (1 << index);
1580         tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1581
1582         napi_enable(&ring->napi);
1583
1584         netif_dbg(priv, hw, priv->netdev,
1585                   "TDMA cfg, size=%d, switch q=%d,port=%d\n",
1586                   ring->size, ring->switch_queue,
1587                   ring->switch_port);
1588
1589         return 0;
1590 }
1591
1592 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1593                                      unsigned int index)
1594 {
1595         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1596         u32 reg;
1597
1598         /* Caller should stop the TDMA engine */
1599         reg = tdma_readl(priv, TDMA_STATUS);
1600         if (!(reg & TDMA_DISABLED))
1601                 netdev_warn(priv->netdev, "TDMA not stopped!\n");
1602
1603         /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1604          * fail, so by checking this pointer we know whether the TX ring was
1605          * fully initialized or not.
1606          */
1607         if (!ring->cbs)
1608                 return;
1609
1610         napi_disable(&ring->napi);
1611         netif_napi_del(&ring->napi);
1612
1613         bcm_sysport_tx_clean(priv, ring);
1614
1615         kfree(ring->cbs);
1616         ring->cbs = NULL;
1617         ring->size = 0;
1618         ring->alloc_size = 0;
1619
1620         netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1621 }
1622
1623 /* RDMA helper */
1624 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1625                                   unsigned int enable)
1626 {
1627         unsigned int timeout = 1000;
1628         u32 reg;
1629
1630         reg = rdma_readl(priv, RDMA_CONTROL);
1631         if (enable)
1632                 reg |= RDMA_EN;
1633         else
1634                 reg &= ~RDMA_EN;
1635         rdma_writel(priv, reg, RDMA_CONTROL);
1636
1637         /* Poll for RMDA disabling completion */
1638         do {
1639                 reg = rdma_readl(priv, RDMA_STATUS);
1640                 if (!!(reg & RDMA_DISABLED) == !enable)
1641                         return 0;
1642                 usleep_range(1000, 2000);
1643         } while (timeout-- > 0);
1644
1645         netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1646
1647         return -ETIMEDOUT;
1648 }
1649
1650 /* TDMA helper */
1651 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1652                                   unsigned int enable)
1653 {
1654         unsigned int timeout = 1000;
1655         u32 reg;
1656
1657         reg = tdma_readl(priv, TDMA_CONTROL);
1658         if (enable)
1659                 reg |= tdma_control_bit(priv, TDMA_EN);
1660         else
1661                 reg &= ~tdma_control_bit(priv, TDMA_EN);
1662         tdma_writel(priv, reg, TDMA_CONTROL);
1663
1664         /* Poll for TMDA disabling completion */
1665         do {
1666                 reg = tdma_readl(priv, TDMA_STATUS);
1667                 if (!!(reg & TDMA_DISABLED) == !enable)
1668                         return 0;
1669
1670                 usleep_range(1000, 2000);
1671         } while (timeout-- > 0);
1672
1673         netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1674
1675         return -ETIMEDOUT;
1676 }
1677
1678 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1679 {
1680         struct bcm_sysport_cb *cb;
1681         u32 reg;
1682         int ret;
1683         int i;
1684
1685         /* Initialize SW view of the RX ring */
1686         priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC;
1687         priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1688         priv->rx_c_index = 0;
1689         priv->rx_read_ptr = 0;
1690         priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1691                                 GFP_KERNEL);
1692         if (!priv->rx_cbs) {
1693                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1694                 return -ENOMEM;
1695         }
1696
1697         for (i = 0; i < priv->num_rx_bds; i++) {
1698                 cb = priv->rx_cbs + i;
1699                 cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1700         }
1701
1702         ret = bcm_sysport_alloc_rx_bufs(priv);
1703         if (ret) {
1704                 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1705                 return ret;
1706         }
1707
1708         /* Initialize HW, ensure RDMA is disabled */
1709         reg = rdma_readl(priv, RDMA_STATUS);
1710         if (!(reg & RDMA_DISABLED))
1711                 rdma_enable_set(priv, 0);
1712
1713         rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1714         rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1715         rdma_writel(priv, 0, RDMA_PROD_INDEX);
1716         rdma_writel(priv, 0, RDMA_CONS_INDEX);
1717         rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1718                           RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1719         /* Operate the queue in ring mode */
1720         rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1721         rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1722         rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1723         rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO);
1724
1725         netif_dbg(priv, hw, priv->netdev,
1726                   "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1727                   priv->num_rx_bds, priv->rx_bds);
1728
1729         return 0;
1730 }
1731
1732 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1733 {
1734         struct bcm_sysport_cb *cb;
1735         unsigned int i;
1736         u32 reg;
1737
1738         /* Caller should ensure RDMA is disabled */
1739         reg = rdma_readl(priv, RDMA_STATUS);
1740         if (!(reg & RDMA_DISABLED))
1741                 netdev_warn(priv->netdev, "RDMA not stopped!\n");
1742
1743         for (i = 0; i < priv->num_rx_bds; i++) {
1744                 cb = &priv->rx_cbs[i];
1745                 if (dma_unmap_addr(cb, dma_addr))
1746                         dma_unmap_single(&priv->pdev->dev,
1747                                          dma_unmap_addr(cb, dma_addr),
1748                                          RX_BUF_LENGTH, DMA_FROM_DEVICE);
1749                 bcm_sysport_free_cb(cb);
1750         }
1751
1752         kfree(priv->rx_cbs);
1753         priv->rx_cbs = NULL;
1754
1755         netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1756 }
1757
1758 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1759 {
1760         struct bcm_sysport_priv *priv = netdev_priv(dev);
1761         u32 reg;
1762
1763         if (priv->is_lite)
1764                 return;
1765
1766         reg = umac_readl(priv, UMAC_CMD);
1767         if (dev->flags & IFF_PROMISC)
1768                 reg |= CMD_PROMISC;
1769         else
1770                 reg &= ~CMD_PROMISC;
1771         umac_writel(priv, reg, UMAC_CMD);
1772
1773         /* No support for ALLMULTI */
1774         if (dev->flags & IFF_ALLMULTI)
1775                 return;
1776 }
1777
1778 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1779                                    u32 mask, unsigned int enable)
1780 {
1781         u32 reg;
1782
1783         if (!priv->is_lite) {
1784                 reg = umac_readl(priv, UMAC_CMD);
1785                 if (enable)
1786                         reg |= mask;
1787                 else
1788                         reg &= ~mask;
1789                 umac_writel(priv, reg, UMAC_CMD);
1790         } else {
1791                 reg = gib_readl(priv, GIB_CONTROL);
1792                 if (enable)
1793                         reg |= mask;
1794                 else
1795                         reg &= ~mask;
1796                 gib_writel(priv, reg, GIB_CONTROL);
1797         }
1798
1799         /* UniMAC stops on a packet boundary, wait for a full-sized packet
1800          * to be processed (1 msec).
1801          */
1802         if (enable == 0)
1803                 usleep_range(1000, 2000);
1804 }
1805
1806 static inline void umac_reset(struct bcm_sysport_priv *priv)
1807 {
1808         u32 reg;
1809
1810         if (priv->is_lite)
1811                 return;
1812
1813         reg = umac_readl(priv, UMAC_CMD);
1814         reg |= CMD_SW_RESET;
1815         umac_writel(priv, reg, UMAC_CMD);
1816         udelay(10);
1817         reg = umac_readl(priv, UMAC_CMD);
1818         reg &= ~CMD_SW_RESET;
1819         umac_writel(priv, reg, UMAC_CMD);
1820 }
1821
1822 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1823                              const unsigned char *addr)
1824 {
1825         u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) |
1826                     addr[3];
1827         u32 mac1 = (addr[4] << 8) | addr[5];
1828
1829         if (!priv->is_lite) {
1830                 umac_writel(priv, mac0, UMAC_MAC0);
1831                 umac_writel(priv, mac1, UMAC_MAC1);
1832         } else {
1833                 gib_writel(priv, mac0, GIB_MAC0);
1834                 gib_writel(priv, mac1, GIB_MAC1);
1835         }
1836 }
1837
1838 static void topctrl_flush(struct bcm_sysport_priv *priv)
1839 {
1840         topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1841         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1842         mdelay(1);
1843         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1844         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1845 }
1846
1847 static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1848 {
1849         struct bcm_sysport_priv *priv = netdev_priv(dev);
1850         struct sockaddr *addr = p;
1851
1852         if (!is_valid_ether_addr(addr->sa_data))
1853                 return -EINVAL;
1854
1855         eth_hw_addr_set(dev, addr->sa_data);
1856
1857         /* interface is disabled, changes to MAC will be reflected on next
1858          * open call
1859          */
1860         if (!netif_running(dev))
1861                 return 0;
1862
1863         umac_set_hw_addr(priv, dev->dev_addr);
1864
1865         return 0;
1866 }
1867
1868 static void bcm_sysport_get_stats64(struct net_device *dev,
1869                                     struct rtnl_link_stats64 *stats)
1870 {
1871         struct bcm_sysport_priv *priv = netdev_priv(dev);
1872         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
1873         unsigned int start;
1874
1875         netdev_stats_to_stats64(stats, &dev->stats);
1876
1877         bcm_sysport_update_tx_stats(priv, &stats->tx_bytes,
1878                                     &stats->tx_packets);
1879
1880         do {
1881                 start = u64_stats_fetch_begin_irq(&priv->syncp);
1882                 stats->rx_packets = stats64->rx_packets;
1883                 stats->rx_bytes = stats64->rx_bytes;
1884         } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
1885 }
1886
1887 static void bcm_sysport_netif_start(struct net_device *dev)
1888 {
1889         struct bcm_sysport_priv *priv = netdev_priv(dev);
1890
1891         /* Enable NAPI */
1892         bcm_sysport_init_dim(priv, bcm_sysport_dim_work);
1893         bcm_sysport_init_rx_coalesce(priv);
1894         napi_enable(&priv->napi);
1895
1896         /* Enable RX interrupt and TX ring full interrupt */
1897         intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1898
1899         phy_start(dev->phydev);
1900
1901         /* Enable TX interrupts for the TXQs */
1902         if (!priv->is_lite)
1903                 intrl2_1_mask_clear(priv, 0xffffffff);
1904         else
1905                 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK);
1906 }
1907
1908 static void rbuf_init(struct bcm_sysport_priv *priv)
1909 {
1910         u32 reg;
1911
1912         reg = rbuf_readl(priv, RBUF_CONTROL);
1913         reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1914         /* Set a correct RSB format on SYSTEMPORT Lite */
1915         if (priv->is_lite)
1916                 reg &= ~RBUF_RSB_SWAP1;
1917
1918         /* Set a correct RSB format based on host endian */
1919         if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1920                 reg |= RBUF_RSB_SWAP0;
1921         else
1922                 reg &= ~RBUF_RSB_SWAP0;
1923         rbuf_writel(priv, reg, RBUF_CONTROL);
1924 }
1925
1926 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv)
1927 {
1928         intrl2_0_mask_set(priv, 0xffffffff);
1929         intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1930         if (!priv->is_lite) {
1931                 intrl2_1_mask_set(priv, 0xffffffff);
1932                 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1933         }
1934 }
1935
1936 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv)
1937 {
1938         u32 reg;
1939
1940         reg = gib_readl(priv, GIB_CONTROL);
1941         /* Include Broadcom tag in pad extension and fix up IPG_LENGTH */
1942         if (netdev_uses_dsa(priv->netdev)) {
1943                 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT);
1944                 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT;
1945         }
1946         reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT);
1947         reg |= 12 << GIB_IPG_LEN_SHIFT;
1948         gib_writel(priv, reg, GIB_CONTROL);
1949 }
1950
1951 static int bcm_sysport_open(struct net_device *dev)
1952 {
1953         struct bcm_sysport_priv *priv = netdev_priv(dev);
1954         struct phy_device *phydev;
1955         unsigned int i;
1956         int ret;
1957
1958         clk_prepare_enable(priv->clk);
1959
1960         /* Reset UniMAC */
1961         umac_reset(priv);
1962
1963         /* Flush TX and RX FIFOs at TOPCTRL level */
1964         topctrl_flush(priv);
1965
1966         /* Disable the UniMAC RX/TX */
1967         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1968
1969         /* Enable RBUF 2bytes alignment and Receive Status Block */
1970         rbuf_init(priv);
1971
1972         /* Set maximum frame length */
1973         if (!priv->is_lite)
1974                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1975         else
1976                 gib_set_pad_extension(priv);
1977
1978         /* Apply features again in case we changed them while interface was
1979          * down
1980          */
1981         bcm_sysport_set_features(dev, dev->features);
1982
1983         /* Set MAC address */
1984         umac_set_hw_addr(priv, dev->dev_addr);
1985
1986         phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1987                                 0, priv->phy_interface);
1988         if (!phydev) {
1989                 netdev_err(dev, "could not attach to PHY\n");
1990                 ret = -ENODEV;
1991                 goto out_clk_disable;
1992         }
1993
1994         /* Reset house keeping link status */
1995         priv->old_duplex = -1;
1996         priv->old_link = -1;
1997         priv->old_pause = -1;
1998
1999         /* mask all interrupts and request them */
2000         bcm_sysport_mask_all_intrs(priv);
2001
2002         ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
2003         if (ret) {
2004                 netdev_err(dev, "failed to request RX interrupt\n");
2005                 goto out_phy_disconnect;
2006         }
2007
2008         if (!priv->is_lite) {
2009                 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0,
2010                                   dev->name, dev);
2011                 if (ret) {
2012                         netdev_err(dev, "failed to request TX interrupt\n");
2013                         goto out_free_irq0;
2014                 }
2015         }
2016
2017         /* Initialize both hardware and software ring */
2018         spin_lock_init(&priv->desc_lock);
2019         for (i = 0; i < dev->num_tx_queues; i++) {
2020                 ret = bcm_sysport_init_tx_ring(priv, i);
2021                 if (ret) {
2022                         netdev_err(dev, "failed to initialize TX ring %d\n",
2023                                    i);
2024                         goto out_free_tx_ring;
2025                 }
2026         }
2027
2028         /* Initialize linked-list */
2029         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2030
2031         /* Initialize RX ring */
2032         ret = bcm_sysport_init_rx_ring(priv);
2033         if (ret) {
2034                 netdev_err(dev, "failed to initialize RX ring\n");
2035                 goto out_free_rx_ring;
2036         }
2037
2038         /* Turn on RDMA */
2039         ret = rdma_enable_set(priv, 1);
2040         if (ret)
2041                 goto out_free_rx_ring;
2042
2043         /* Turn on TDMA */
2044         ret = tdma_enable_set(priv, 1);
2045         if (ret)
2046                 goto out_clear_rx_int;
2047
2048         /* Turn on UniMAC TX/RX */
2049         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
2050
2051         bcm_sysport_netif_start(dev);
2052
2053         netif_tx_start_all_queues(dev);
2054
2055         return 0;
2056
2057 out_clear_rx_int:
2058         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
2059 out_free_rx_ring:
2060         bcm_sysport_fini_rx_ring(priv);
2061 out_free_tx_ring:
2062         for (i = 0; i < dev->num_tx_queues; i++)
2063                 bcm_sysport_fini_tx_ring(priv, i);
2064         if (!priv->is_lite)
2065                 free_irq(priv->irq1, dev);
2066 out_free_irq0:
2067         free_irq(priv->irq0, dev);
2068 out_phy_disconnect:
2069         phy_disconnect(phydev);
2070 out_clk_disable:
2071         clk_disable_unprepare(priv->clk);
2072         return ret;
2073 }
2074
2075 static void bcm_sysport_netif_stop(struct net_device *dev)
2076 {
2077         struct bcm_sysport_priv *priv = netdev_priv(dev);
2078
2079         /* stop all software from updating hardware */
2080         netif_tx_disable(dev);
2081         napi_disable(&priv->napi);
2082         cancel_work_sync(&priv->dim.dim.work);
2083         phy_stop(dev->phydev);
2084
2085         /* mask all interrupts */
2086         bcm_sysport_mask_all_intrs(priv);
2087 }
2088
2089 static int bcm_sysport_stop(struct net_device *dev)
2090 {
2091         struct bcm_sysport_priv *priv = netdev_priv(dev);
2092         unsigned int i;
2093         int ret;
2094
2095         bcm_sysport_netif_stop(dev);
2096
2097         /* Disable UniMAC RX */
2098         umac_enable_set(priv, CMD_RX_EN, 0);
2099
2100         ret = tdma_enable_set(priv, 0);
2101         if (ret) {
2102                 netdev_err(dev, "timeout disabling RDMA\n");
2103                 return ret;
2104         }
2105
2106         /* Wait for a maximum packet size to be drained */
2107         usleep_range(2000, 3000);
2108
2109         ret = rdma_enable_set(priv, 0);
2110         if (ret) {
2111                 netdev_err(dev, "timeout disabling TDMA\n");
2112                 return ret;
2113         }
2114
2115         /* Disable UniMAC TX */
2116         umac_enable_set(priv, CMD_TX_EN, 0);
2117
2118         /* Free RX/TX rings SW structures */
2119         for (i = 0; i < dev->num_tx_queues; i++)
2120                 bcm_sysport_fini_tx_ring(priv, i);
2121         bcm_sysport_fini_rx_ring(priv);
2122
2123         free_irq(priv->irq0, dev);
2124         if (!priv->is_lite)
2125                 free_irq(priv->irq1, dev);
2126
2127         /* Disconnect from PHY */
2128         phy_disconnect(dev->phydev);
2129
2130         clk_disable_unprepare(priv->clk);
2131
2132         return 0;
2133 }
2134
2135 static int bcm_sysport_rule_find(struct bcm_sysport_priv *priv,
2136                                  u64 location)
2137 {
2138         unsigned int index;
2139         u32 reg;
2140
2141         for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2142                 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2143                 reg >>= RXCHK_BRCM_TAG_CID_SHIFT;
2144                 reg &= RXCHK_BRCM_TAG_CID_MASK;
2145                 if (reg == location)
2146                         return index;
2147         }
2148
2149         return -EINVAL;
2150 }
2151
2152 static int bcm_sysport_rule_get(struct bcm_sysport_priv *priv,
2153                                 struct ethtool_rxnfc *nfc)
2154 {
2155         int index;
2156
2157         /* This is not a rule that we know about */
2158         index = bcm_sysport_rule_find(priv, nfc->fs.location);
2159         if (index < 0)
2160                 return -EOPNOTSUPP;
2161
2162         nfc->fs.ring_cookie = RX_CLS_FLOW_WAKE;
2163
2164         return 0;
2165 }
2166
2167 static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv,
2168                                 struct ethtool_rxnfc *nfc)
2169 {
2170         unsigned int index;
2171         u32 reg;
2172
2173         /* We cannot match locations greater than what the classification ID
2174          * permits (256 entries)
2175          */
2176         if (nfc->fs.location > RXCHK_BRCM_TAG_CID_MASK)
2177                 return -E2BIG;
2178
2179         /* We cannot support flows that are not destined for a wake-up */
2180         if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE)
2181                 return -EOPNOTSUPP;
2182
2183         index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX);
2184         if (index >= RXCHK_BRCM_TAG_MAX)
2185                 /* All filters are already in use, we cannot match more rules */
2186                 return -ENOSPC;
2187
2188         /* Location is the classification ID, and index is the position
2189          * within one of our 8 possible filters to be programmed
2190          */
2191         reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2192         reg &= ~(RXCHK_BRCM_TAG_CID_MASK << RXCHK_BRCM_TAG_CID_SHIFT);
2193         reg |= nfc->fs.location << RXCHK_BRCM_TAG_CID_SHIFT;
2194         rxchk_writel(priv, reg, RXCHK_BRCM_TAG(index));
2195         rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
2196
2197         priv->filters_loc[index] = nfc->fs.location;
2198         set_bit(index, priv->filters);
2199
2200         return 0;
2201 }
2202
2203 static int bcm_sysport_rule_del(struct bcm_sysport_priv *priv,
2204                                 u64 location)
2205 {
2206         int index;
2207
2208         /* This is not a rule that we know about */
2209         index = bcm_sysport_rule_find(priv, location);
2210         if (index < 0)
2211                 return -EOPNOTSUPP;
2212
2213         /* No need to disable this filter if it was enabled, this will
2214          * be taken care of during suspend time by bcm_sysport_suspend_to_wol
2215          */
2216         clear_bit(index, priv->filters);
2217         priv->filters_loc[index] = 0;
2218
2219         return 0;
2220 }
2221
2222 static int bcm_sysport_get_rxnfc(struct net_device *dev,
2223                                  struct ethtool_rxnfc *nfc, u32 *rule_locs)
2224 {
2225         struct bcm_sysport_priv *priv = netdev_priv(dev);
2226         int ret = -EOPNOTSUPP;
2227
2228         switch (nfc->cmd) {
2229         case ETHTOOL_GRXCLSRULE:
2230                 ret = bcm_sysport_rule_get(priv, nfc);
2231                 break;
2232         default:
2233                 break;
2234         }
2235
2236         return ret;
2237 }
2238
2239 static int bcm_sysport_set_rxnfc(struct net_device *dev,
2240                                  struct ethtool_rxnfc *nfc)
2241 {
2242         struct bcm_sysport_priv *priv = netdev_priv(dev);
2243         int ret = -EOPNOTSUPP;
2244
2245         switch (nfc->cmd) {
2246         case ETHTOOL_SRXCLSRLINS:
2247                 ret = bcm_sysport_rule_set(priv, nfc);
2248                 break;
2249         case ETHTOOL_SRXCLSRLDEL:
2250                 ret = bcm_sysport_rule_del(priv, nfc->fs.location);
2251                 break;
2252         default:
2253                 break;
2254         }
2255
2256         return ret;
2257 }
2258
2259 static const struct ethtool_ops bcm_sysport_ethtool_ops = {
2260         .supported_coalesce_params = ETHTOOL_COALESCE_USECS |
2261                                      ETHTOOL_COALESCE_MAX_FRAMES |
2262                                      ETHTOOL_COALESCE_USE_ADAPTIVE_RX,
2263         .get_drvinfo            = bcm_sysport_get_drvinfo,
2264         .get_msglevel           = bcm_sysport_get_msglvl,
2265         .set_msglevel           = bcm_sysport_set_msglvl,
2266         .get_link               = ethtool_op_get_link,
2267         .get_strings            = bcm_sysport_get_strings,
2268         .get_ethtool_stats      = bcm_sysport_get_stats,
2269         .get_sset_count         = bcm_sysport_get_sset_count,
2270         .get_wol                = bcm_sysport_get_wol,
2271         .set_wol                = bcm_sysport_set_wol,
2272         .get_coalesce           = bcm_sysport_get_coalesce,
2273         .set_coalesce           = bcm_sysport_set_coalesce,
2274         .get_link_ksettings     = phy_ethtool_get_link_ksettings,
2275         .set_link_ksettings     = phy_ethtool_set_link_ksettings,
2276         .get_rxnfc              = bcm_sysport_get_rxnfc,
2277         .set_rxnfc              = bcm_sysport_set_rxnfc,
2278 };
2279
2280 static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb,
2281                                     struct net_device *sb_dev)
2282 {
2283         struct bcm_sysport_priv *priv = netdev_priv(dev);
2284         u16 queue = skb_get_queue_mapping(skb);
2285         struct bcm_sysport_tx_ring *tx_ring;
2286         unsigned int q, port;
2287
2288         if (!netdev_uses_dsa(dev))
2289                 return netdev_pick_tx(dev, skb, NULL);
2290
2291         /* DSA tagging layer will have configured the correct queue */
2292         q = BRCM_TAG_GET_QUEUE(queue);
2293         port = BRCM_TAG_GET_PORT(queue);
2294         tx_ring = priv->ring_map[q + port * priv->per_port_num_tx_queues];
2295
2296         if (unlikely(!tx_ring))
2297                 return netdev_pick_tx(dev, skb, NULL);
2298
2299         return tx_ring->index;
2300 }
2301
2302 static const struct net_device_ops bcm_sysport_netdev_ops = {
2303         .ndo_start_xmit         = bcm_sysport_xmit,
2304         .ndo_tx_timeout         = bcm_sysport_tx_timeout,
2305         .ndo_open               = bcm_sysport_open,
2306         .ndo_stop               = bcm_sysport_stop,
2307         .ndo_set_features       = bcm_sysport_set_features,
2308         .ndo_set_rx_mode        = bcm_sysport_set_rx_mode,
2309         .ndo_set_mac_address    = bcm_sysport_change_mac,
2310 #ifdef CONFIG_NET_POLL_CONTROLLER
2311         .ndo_poll_controller    = bcm_sysport_poll_controller,
2312 #endif
2313         .ndo_get_stats64        = bcm_sysport_get_stats64,
2314         .ndo_select_queue       = bcm_sysport_select_queue,
2315 };
2316
2317 static int bcm_sysport_map_queues(struct net_device *dev,
2318                                   struct net_device *slave_dev)
2319 {
2320         struct dsa_port *dp = dsa_port_from_netdev(slave_dev);
2321         struct bcm_sysport_priv *priv = netdev_priv(dev);
2322         struct bcm_sysport_tx_ring *ring;
2323         unsigned int num_tx_queues;
2324         unsigned int q, qp, port;
2325
2326         /* We can't be setting up queue inspection for non directly attached
2327          * switches
2328          */
2329         if (dp->ds->index)
2330                 return 0;
2331
2332         port = dp->index;
2333
2334         /* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a
2335          * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of
2336          * per-port (slave_dev) network devices queue, we achieve just that.
2337          * This need to happen now before any slave network device is used such
2338          * it accurately reflects the number of real TX queues.
2339          */
2340         if (priv->is_lite)
2341                 netif_set_real_num_tx_queues(slave_dev,
2342                                              slave_dev->num_tx_queues / 2);
2343
2344         num_tx_queues = slave_dev->real_num_tx_queues;
2345
2346         if (priv->per_port_num_tx_queues &&
2347             priv->per_port_num_tx_queues != num_tx_queues)
2348                 netdev_warn(slave_dev, "asymmetric number of per-port queues\n");
2349
2350         priv->per_port_num_tx_queues = num_tx_queues;
2351
2352         for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues;
2353              q++) {
2354                 ring = &priv->tx_rings[q];
2355
2356                 if (ring->inspect)
2357                         continue;
2358
2359                 /* Just remember the mapping actual programming done
2360                  * during bcm_sysport_init_tx_ring
2361                  */
2362                 ring->switch_queue = qp;
2363                 ring->switch_port = port;
2364                 ring->inspect = true;
2365                 priv->ring_map[qp + port * num_tx_queues] = ring;
2366                 qp++;
2367         }
2368
2369         return 0;
2370 }
2371
2372 static int bcm_sysport_unmap_queues(struct net_device *dev,
2373                                     struct net_device *slave_dev)
2374 {
2375         struct dsa_port *dp = dsa_port_from_netdev(slave_dev);
2376         struct bcm_sysport_priv *priv = netdev_priv(dev);
2377         struct bcm_sysport_tx_ring *ring;
2378         unsigned int num_tx_queues;
2379         unsigned int q, qp, port;
2380
2381         port = dp->index;
2382
2383         num_tx_queues = slave_dev->real_num_tx_queues;
2384
2385         for (q = 0; q < dev->num_tx_queues; q++) {
2386                 ring = &priv->tx_rings[q];
2387
2388                 if (ring->switch_port != port)
2389                         continue;
2390
2391                 if (!ring->inspect)
2392                         continue;
2393
2394                 ring->inspect = false;
2395                 qp = ring->switch_queue;
2396                 priv->ring_map[qp + port * num_tx_queues] = NULL;
2397         }
2398
2399         return 0;
2400 }
2401
2402 static int bcm_sysport_netdevice_event(struct notifier_block *nb,
2403                                        unsigned long event, void *ptr)
2404 {
2405         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2406         struct netdev_notifier_changeupper_info *info = ptr;
2407         struct bcm_sysport_priv *priv;
2408         int ret = 0;
2409
2410         priv = container_of(nb, struct bcm_sysport_priv, netdev_notifier);
2411         if (priv->netdev != dev)
2412                 return NOTIFY_DONE;
2413
2414         switch (event) {
2415         case NETDEV_CHANGEUPPER:
2416                 if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2417                         return NOTIFY_DONE;
2418
2419                 if (!dsa_slave_dev_check(info->upper_dev))
2420                         return NOTIFY_DONE;
2421
2422                 if (info->linking)
2423                         ret = bcm_sysport_map_queues(dev, info->upper_dev);
2424                 else
2425                         ret = bcm_sysport_unmap_queues(dev, info->upper_dev);
2426                 break;
2427         }
2428
2429         return notifier_from_errno(ret);
2430 }
2431
2432 #define REV_FMT "v%2x.%02x"
2433
2434 static const struct bcm_sysport_hw_params bcm_sysport_params[] = {
2435         [SYSTEMPORT] = {
2436                 .is_lite = false,
2437                 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS,
2438         },
2439         [SYSTEMPORT_LITE] = {
2440                 .is_lite = true,
2441                 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS,
2442         },
2443 };
2444
2445 static const struct of_device_id bcm_sysport_of_match[] = {
2446         { .compatible = "brcm,systemportlite-v1.00",
2447           .data = &bcm_sysport_params[SYSTEMPORT_LITE] },
2448         { .compatible = "brcm,systemport-v1.00",
2449           .data = &bcm_sysport_params[SYSTEMPORT] },
2450         { .compatible = "brcm,systemport",
2451           .data = &bcm_sysport_params[SYSTEMPORT] },
2452         { /* sentinel */ }
2453 };
2454 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
2455
2456 static int bcm_sysport_probe(struct platform_device *pdev)
2457 {
2458         const struct bcm_sysport_hw_params *params;
2459         const struct of_device_id *of_id = NULL;
2460         struct bcm_sysport_priv *priv;
2461         struct device_node *dn;
2462         struct net_device *dev;
2463         u32 txq, rxq;
2464         int ret;
2465
2466         dn = pdev->dev.of_node;
2467         of_id = of_match_node(bcm_sysport_of_match, dn);
2468         if (!of_id || !of_id->data)
2469                 return -EINVAL;
2470
2471         ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
2472         if (ret)
2473                 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2474         if (ret) {
2475                 dev_err(&pdev->dev, "unable to set DMA mask: %d\n", ret);
2476                 return ret;
2477         }
2478
2479         /* Fairly quickly we need to know the type of adapter we have */
2480         params = of_id->data;
2481
2482         /* Read the Transmit/Receive Queue properties */
2483         if (of_property_read_u32(dn, "systemport,num-txq", &txq))
2484                 txq = TDMA_NUM_RINGS;
2485         if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
2486                 rxq = 1;
2487
2488         /* Sanity check the number of transmit queues */
2489         if (!txq || txq > TDMA_NUM_RINGS)
2490                 return -EINVAL;
2491
2492         dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
2493         if (!dev)
2494                 return -ENOMEM;
2495
2496         /* Initialize private members */
2497         priv = netdev_priv(dev);
2498
2499         priv->clk = devm_clk_get_optional(&pdev->dev, "sw_sysport");
2500         if (IS_ERR(priv->clk)) {
2501                 ret = PTR_ERR(priv->clk);
2502                 goto err_free_netdev;
2503         }
2504
2505         /* Allocate number of TX rings */
2506         priv->tx_rings = devm_kcalloc(&pdev->dev, txq,
2507                                       sizeof(struct bcm_sysport_tx_ring),
2508                                       GFP_KERNEL);
2509         if (!priv->tx_rings) {
2510                 ret = -ENOMEM;
2511                 goto err_free_netdev;
2512         }
2513
2514         priv->is_lite = params->is_lite;
2515         priv->num_rx_desc_words = params->num_rx_desc_words;
2516
2517         priv->irq0 = platform_get_irq(pdev, 0);
2518         if (!priv->is_lite) {
2519                 priv->irq1 = platform_get_irq(pdev, 1);
2520                 priv->wol_irq = platform_get_irq(pdev, 2);
2521         } else {
2522                 priv->wol_irq = platform_get_irq(pdev, 1);
2523         }
2524         if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) {
2525                 ret = -EINVAL;
2526                 goto err_free_netdev;
2527         }
2528
2529         priv->base = devm_platform_ioremap_resource(pdev, 0);
2530         if (IS_ERR(priv->base)) {
2531                 ret = PTR_ERR(priv->base);
2532                 goto err_free_netdev;
2533         }
2534
2535         priv->netdev = dev;
2536         priv->pdev = pdev;
2537
2538         ret = of_get_phy_mode(dn, &priv->phy_interface);
2539         /* Default to GMII interface mode */
2540         if (ret)
2541                 priv->phy_interface = PHY_INTERFACE_MODE_GMII;
2542
2543         /* In the case of a fixed PHY, the DT node associated
2544          * to the PHY is the Ethernet MAC DT node.
2545          */
2546         if (of_phy_is_fixed_link(dn)) {
2547                 ret = of_phy_register_fixed_link(dn);
2548                 if (ret) {
2549                         dev_err(&pdev->dev, "failed to register fixed PHY\n");
2550                         goto err_free_netdev;
2551                 }
2552
2553                 priv->phy_dn = dn;
2554         }
2555
2556         /* Initialize netdevice members */
2557         ret = of_get_ethdev_address(dn, dev);
2558         if (ret) {
2559                 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
2560                 eth_hw_addr_random(dev);
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                 ret = PTR_ERR(priv->wol_clk);
2586                 goto err_deregister_fixed_link;
2587         }
2588
2589         /* Set the needed headroom once and for all */
2590         BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
2591         dev->needed_headroom += sizeof(struct bcm_tsb);
2592
2593         /* libphy will adjust the link state accordingly */
2594         netif_carrier_off(dev);
2595
2596         priv->rx_max_coalesced_frames = 1;
2597         u64_stats_init(&priv->syncp);
2598
2599         priv->netdev_notifier.notifier_call = bcm_sysport_netdevice_event;
2600
2601         ret = register_netdevice_notifier(&priv->netdev_notifier);
2602         if (ret) {
2603                 dev_err(&pdev->dev, "failed to register DSA notifier\n");
2604                 goto err_deregister_fixed_link;
2605         }
2606
2607         ret = register_netdev(dev);
2608         if (ret) {
2609                 dev_err(&pdev->dev, "failed to register net_device\n");
2610                 goto err_deregister_notifier;
2611         }
2612
2613         clk_prepare_enable(priv->clk);
2614
2615         priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
2616         dev_info(&pdev->dev,
2617                  "Broadcom SYSTEMPORT%s " REV_FMT
2618                  " (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
2619                  priv->is_lite ? " Lite" : "",
2620                  (priv->rev >> 8) & 0xff, priv->rev & 0xff,
2621                  priv->irq0, priv->irq1, txq, rxq);
2622
2623         clk_disable_unprepare(priv->clk);
2624
2625         return 0;
2626
2627 err_deregister_notifier:
2628         unregister_netdevice_notifier(&priv->netdev_notifier);
2629 err_deregister_fixed_link:
2630         if (of_phy_is_fixed_link(dn))
2631                 of_phy_deregister_fixed_link(dn);
2632 err_free_netdev:
2633         free_netdev(dev);
2634         return ret;
2635 }
2636
2637 static int bcm_sysport_remove(struct platform_device *pdev)
2638 {
2639         struct net_device *dev = dev_get_drvdata(&pdev->dev);
2640         struct bcm_sysport_priv *priv = netdev_priv(dev);
2641         struct device_node *dn = pdev->dev.of_node;
2642
2643         /* Not much to do, ndo_close has been called
2644          * and we use managed allocations
2645          */
2646         unregister_netdevice_notifier(&priv->netdev_notifier);
2647         unregister_netdev(dev);
2648         if (of_phy_is_fixed_link(dn))
2649                 of_phy_deregister_fixed_link(dn);
2650         free_netdev(dev);
2651         dev_set_drvdata(&pdev->dev, NULL);
2652
2653         return 0;
2654 }
2655
2656 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
2657 {
2658         struct net_device *ndev = priv->netdev;
2659         unsigned int timeout = 1000;
2660         unsigned int index, i = 0;
2661         u32 reg;
2662
2663         reg = umac_readl(priv, UMAC_MPD_CTRL);
2664         if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE))
2665                 reg |= MPD_EN;
2666         reg &= ~PSW_EN;
2667         if (priv->wolopts & WAKE_MAGICSECURE) {
2668                 /* Program the SecureOn password */
2669                 umac_writel(priv, get_unaligned_be16(&priv->sopass[0]),
2670                             UMAC_PSW_MS);
2671                 umac_writel(priv, get_unaligned_be32(&priv->sopass[2]),
2672                             UMAC_PSW_LS);
2673                 reg |= PSW_EN;
2674         }
2675         umac_writel(priv, reg, UMAC_MPD_CTRL);
2676
2677         if (priv->wolopts & WAKE_FILTER) {
2678                 /* Turn on ACPI matching to steal packets from RBUF */
2679                 reg = rbuf_readl(priv, RBUF_CONTROL);
2680                 if (priv->is_lite)
2681                         reg |= RBUF_ACPI_EN_LITE;
2682                 else
2683                         reg |= RBUF_ACPI_EN;
2684                 rbuf_writel(priv, reg, RBUF_CONTROL);
2685
2686                 /* Enable RXCHK, active filters and Broadcom tag matching */
2687                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2688                 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
2689                          RXCHK_BRCM_TAG_MATCH_SHIFT);
2690                 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2691                         reg |= BIT(RXCHK_BRCM_TAG_MATCH_SHIFT + i);
2692                         i++;
2693                 }
2694                 reg |= RXCHK_EN | RXCHK_BRCM_TAG_EN;
2695                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2696         }
2697
2698         /* Make sure RBUF entered WoL mode as result */
2699         do {
2700                 reg = rbuf_readl(priv, RBUF_STATUS);
2701                 if (reg & RBUF_WOL_MODE)
2702                         break;
2703
2704                 udelay(10);
2705         } while (timeout-- > 0);
2706
2707         /* Do not leave the UniMAC RBUF matching only MPD packets */
2708         if (!timeout) {
2709                 mpd_enable_set(priv, false);
2710                 netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
2711                 return -ETIMEDOUT;
2712         }
2713
2714         /* UniMAC receive needs to be turned on */
2715         umac_enable_set(priv, CMD_RX_EN, 1);
2716
2717         netif_dbg(priv, wol, ndev, "entered WOL mode\n");
2718
2719         return 0;
2720 }
2721
2722 static int __maybe_unused bcm_sysport_suspend(struct device *d)
2723 {
2724         struct net_device *dev = dev_get_drvdata(d);
2725         struct bcm_sysport_priv *priv = netdev_priv(dev);
2726         unsigned int i;
2727         int ret = 0;
2728         u32 reg;
2729
2730         if (!netif_running(dev))
2731                 return 0;
2732
2733         netif_device_detach(dev);
2734
2735         bcm_sysport_netif_stop(dev);
2736
2737         phy_suspend(dev->phydev);
2738
2739         /* Disable UniMAC RX */
2740         umac_enable_set(priv, CMD_RX_EN, 0);
2741
2742         ret = rdma_enable_set(priv, 0);
2743         if (ret) {
2744                 netdev_err(dev, "RDMA timeout!\n");
2745                 return ret;
2746         }
2747
2748         /* Disable RXCHK if enabled */
2749         if (priv->rx_chk_en) {
2750                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2751                 reg &= ~RXCHK_EN;
2752                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2753         }
2754
2755         /* Flush RX pipe */
2756         if (!priv->wolopts)
2757                 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
2758
2759         ret = tdma_enable_set(priv, 0);
2760         if (ret) {
2761                 netdev_err(dev, "TDMA timeout!\n");
2762                 return ret;
2763         }
2764
2765         /* Wait for a packet boundary */
2766         usleep_range(2000, 3000);
2767
2768         umac_enable_set(priv, CMD_TX_EN, 0);
2769
2770         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
2771
2772         /* Free RX/TX rings SW structures */
2773         for (i = 0; i < dev->num_tx_queues; i++)
2774                 bcm_sysport_fini_tx_ring(priv, i);
2775         bcm_sysport_fini_rx_ring(priv);
2776
2777         /* Get prepared for Wake-on-LAN */
2778         if (device_may_wakeup(d) && priv->wolopts) {
2779                 clk_prepare_enable(priv->wol_clk);
2780                 ret = bcm_sysport_suspend_to_wol(priv);
2781         }
2782
2783         clk_disable_unprepare(priv->clk);
2784
2785         return ret;
2786 }
2787
2788 static int __maybe_unused bcm_sysport_resume(struct device *d)
2789 {
2790         struct net_device *dev = dev_get_drvdata(d);
2791         struct bcm_sysport_priv *priv = netdev_priv(dev);
2792         unsigned int i;
2793         int ret;
2794
2795         if (!netif_running(dev))
2796                 return 0;
2797
2798         clk_prepare_enable(priv->clk);
2799         if (priv->wolopts)
2800                 clk_disable_unprepare(priv->wol_clk);
2801
2802         umac_reset(priv);
2803
2804         /* Disable the UniMAC RX/TX */
2805         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
2806
2807         /* We may have been suspended and never received a WOL event that
2808          * would turn off MPD detection, take care of that now
2809          */
2810         bcm_sysport_resume_from_wol(priv);
2811
2812         /* Initialize both hardware and software ring */
2813         for (i = 0; i < dev->num_tx_queues; i++) {
2814                 ret = bcm_sysport_init_tx_ring(priv, i);
2815                 if (ret) {
2816                         netdev_err(dev, "failed to initialize TX ring %d\n",
2817                                    i);
2818                         goto out_free_tx_rings;
2819                 }
2820         }
2821
2822         /* Initialize linked-list */
2823         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2824
2825         /* Initialize RX ring */
2826         ret = bcm_sysport_init_rx_ring(priv);
2827         if (ret) {
2828                 netdev_err(dev, "failed to initialize RX ring\n");
2829                 goto out_free_rx_ring;
2830         }
2831
2832         /* RX pipe enable */
2833         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2834
2835         ret = rdma_enable_set(priv, 1);
2836         if (ret) {
2837                 netdev_err(dev, "failed to enable RDMA\n");
2838                 goto out_free_rx_ring;
2839         }
2840
2841         /* Restore enabled features */
2842         bcm_sysport_set_features(dev, dev->features);
2843
2844         rbuf_init(priv);
2845
2846         /* Set maximum frame length */
2847         if (!priv->is_lite)
2848                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2849         else
2850                 gib_set_pad_extension(priv);
2851
2852         /* Set MAC address */
2853         umac_set_hw_addr(priv, dev->dev_addr);
2854
2855         umac_enable_set(priv, CMD_RX_EN, 1);
2856
2857         /* TX pipe enable */
2858         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2859
2860         umac_enable_set(priv, CMD_TX_EN, 1);
2861
2862         ret = tdma_enable_set(priv, 1);
2863         if (ret) {
2864                 netdev_err(dev, "TDMA timeout!\n");
2865                 goto out_free_rx_ring;
2866         }
2867
2868         phy_resume(dev->phydev);
2869
2870         bcm_sysport_netif_start(dev);
2871
2872         netif_device_attach(dev);
2873
2874         return 0;
2875
2876 out_free_rx_ring:
2877         bcm_sysport_fini_rx_ring(priv);
2878 out_free_tx_rings:
2879         for (i = 0; i < dev->num_tx_queues; i++)
2880                 bcm_sysport_fini_tx_ring(priv, i);
2881         clk_disable_unprepare(priv->clk);
2882         return ret;
2883 }
2884
2885 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2886                 bcm_sysport_suspend, bcm_sysport_resume);
2887
2888 static struct platform_driver bcm_sysport_driver = {
2889         .probe  = bcm_sysport_probe,
2890         .remove = bcm_sysport_remove,
2891         .driver =  {
2892                 .name = "brcm-systemport",
2893                 .of_match_table = bcm_sysport_of_match,
2894                 .pm = &bcm_sysport_pm_ops,
2895         },
2896 };
2897 module_platform_driver(bcm_sysport_driver);
2898
2899 MODULE_AUTHOR("Broadcom Corporation");
2900 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2901 MODULE_ALIAS("platform:brcm-systemport");
2902 MODULE_LICENSE("GPL");