drivers/net/ethernet/broadcom/bcmsysport.c

   1 /*
   2  * Broadcom BCM7xxx System Port Ethernet MAC driver
   3  *
   4  * Copyright (C) 2014 Broadcom Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #define pr_fmt(fmt)     KBUILD_MODNAME ": " fmt
  12
  13 #include <linux/init.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/module.h>
  16 #include <linux/kernel.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/of.h>
  21 #include <linux/of_net.h>
  22 #include <linux/of_mdio.h>
  23 #include <linux/phy.h>
  24 #include <linux/phy_fixed.h>
  25 #include <net/dsa.h>
  26 #include <net/ip.h>
  27 #include <net/ipv6.h>
  28
  29 #include "bcmsysport.h"
  30
  31 /* I/O accessors register helpers */
  32 #define BCM_SYSPORT_IO_MACRO(name, offset) \
  33 static inline u32 name##_readl(struct bcm_sysport_priv *priv, u32 off)  \
  34 {                                                                       \
  35         u32 reg = readl_relaxed(priv->base + offset + off);             \
  36         return reg;                                                     \
  37 }                                                                       \
  38 static inline void name##_writel(struct bcm_sysport_priv *priv,         \
  39                                   u32 val, u32 off)                     \
  40 {                                                                       \
  41         writel_relaxed(val, priv->base + offset + off);                 \
  42 }                                                                       \
  43
  44 BCM_SYSPORT_IO_MACRO(intrl2_0, SYS_PORT_INTRL2_0_OFFSET);
  45 BCM_SYSPORT_IO_MACRO(intrl2_1, SYS_PORT_INTRL2_1_OFFSET);
  46 BCM_SYSPORT_IO_MACRO(umac, SYS_PORT_UMAC_OFFSET);
  47 BCM_SYSPORT_IO_MACRO(gib, SYS_PORT_GIB_OFFSET);
  48 BCM_SYSPORT_IO_MACRO(tdma, SYS_PORT_TDMA_OFFSET);
  49 BCM_SYSPORT_IO_MACRO(rxchk, SYS_PORT_RXCHK_OFFSET);
  50 BCM_SYSPORT_IO_MACRO(txchk, SYS_PORT_TXCHK_OFFSET);
  51 BCM_SYSPORT_IO_MACRO(rbuf, SYS_PORT_RBUF_OFFSET);
  52 BCM_SYSPORT_IO_MACRO(tbuf, SYS_PORT_TBUF_OFFSET);
  53 BCM_SYSPORT_IO_MACRO(topctrl, SYS_PORT_TOPCTRL_OFFSET);
  54
  55 /* On SYSTEMPORT Lite, any register after RDMA_STATUS has the exact
  56  * same layout, except it has been moved by 4 bytes up, *sigh*
  57  */
  58 static inline u32 rdma_readl(struct bcm_sysport_priv *priv, u32 off)
  59 {
  60         if (priv->is_lite && off >= RDMA_STATUS)
  61                 off += 4;
  62         return readl_relaxed(priv->base + SYS_PORT_RDMA_OFFSET + off);
  63 }
  64
  65 static inline void rdma_writel(struct bcm_sysport_priv *priv, u32 val, u32 off)
  66 {
  67         if (priv->is_lite && off >= RDMA_STATUS)
  68                 off += 4;
  69         writel_relaxed(val, priv->base + SYS_PORT_RDMA_OFFSET + off);
  70 }
  71
  72 static inline u32 tdma_control_bit(struct bcm_sysport_priv *priv, u32 bit)
  73 {
  74         if (!priv->is_lite) {
  75                 return BIT(bit);
  76         } else {
  77                 if (bit >= ACB_ALGO)
  78                         return BIT(bit + 1);
  79                 else
  80                         return BIT(bit);
  81         }
  82 }
  83
  84 /* L2-interrupt masking/unmasking helpers, does automatic saving of the applied
  85  * mask in a software copy to avoid CPU_MASK_STATUS reads in hot-paths.
  86   */
  87 #define BCM_SYSPORT_INTR_L2(which)      \
  88 static inline void intrl2_##which##_mask_clear(struct bcm_sysport_priv *priv, \
  89                                                 u32 mask)               \
  90 {                                                                       \
  91         priv->irq##which##_mask &= ~(mask);                             \
  92         intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR);     \
  93 }                                                                       \
  94 static inline void intrl2_##which##_mask_set(struct bcm_sysport_priv *priv, \
  95                                                 u32 mask)               \
  96 {                                                                       \
  97         intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET);      \
  98         priv->irq##which##_mask |= (mask);                              \
  99 }                                                                       \
 100
 101 BCM_SYSPORT_INTR_L2(0)
 102 BCM_SYSPORT_INTR_L2(1)
 103
 104 /* Register accesses to GISB/RBUS registers are expensive (few hundred
 105  * nanoseconds), so keep the check for 64-bits explicit here to save
 106  * one register write per-packet on 32-bits platforms.
 107  */
 108 static inline void dma_desc_set_addr(struct bcm_sysport_priv *priv,
 109                                      void __iomem *d,
 110                                      dma_addr_t addr)
 111 {
 112 #ifdef CONFIG_PHYS_ADDR_T_64BIT
 113         writel_relaxed(upper_32_bits(addr) & DESC_ADDR_HI_MASK,
 114                      d + DESC_ADDR_HI_STATUS_LEN);
 115 #endif
 116         writel_relaxed(lower_32_bits(addr), d + DESC_ADDR_LO);
 117 }
 118
 119 static inline void tdma_port_write_desc_addr(struct bcm_sysport_priv *priv,
 120                                              struct dma_desc *desc,
 121                                              unsigned int port)
 122 {
 123         /* Ports are latched, so write upper address first */
 124         tdma_writel(priv, desc->addr_status_len, TDMA_WRITE_PORT_HI(port));
 125         tdma_writel(priv, desc->addr_lo, TDMA_WRITE_PORT_LO(port));
 126 }
 127
 128 /* Ethtool operations */
 129 static void bcm_sysport_set_rx_csum(struct net_device *dev,
 130                                     netdev_features_t wanted)
 131 {
 132         struct bcm_sysport_priv *priv = netdev_priv(dev);
 133         u32 reg;
 134
 135         priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM);
 136         reg = rxchk_readl(priv, RXCHK_CONTROL);
 137         if (priv->rx_chk_en)
 138                 reg |= RXCHK_EN;
 139         else
 140                 reg &= ~RXCHK_EN;
 141
 142         /* If UniMAC forwards CRC, we need to skip over it to get
 143          * a valid CHK bit to be set in the per-packet status word
 144          */
 145         if (priv->rx_chk_en && priv->crc_fwd)
 146                 reg |= RXCHK_SKIP_FCS;
 147         else
 148                 reg &= ~RXCHK_SKIP_FCS;
 149
 150         /* If Broadcom tags are enabled (e.g: using a switch), make
 151          * sure we tell the RXCHK hardware to expect a 4-bytes Broadcom
 152          * tag after the Ethernet MAC Source Address.
 153          */
 154         if (netdev_uses_dsa(dev))
 155                 reg |= RXCHK_BRCM_TAG_EN;
 156         else
 157                 reg &= ~RXCHK_BRCM_TAG_EN;
 158
 159         rxchk_writel(priv, reg, RXCHK_CONTROL);
 160 }
 161
 162 static void bcm_sysport_set_tx_csum(struct net_device *dev,
 163                                     netdev_features_t wanted)
 164 {
 165         struct bcm_sysport_priv *priv = netdev_priv(dev);
 166         u32 reg;
 167
 168         /* Hardware transmit checksum requires us to enable the Transmit status
 169          * block prepended to the packet contents
 170          */
 171         priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM));
 172         reg = tdma_readl(priv, TDMA_CONTROL);
 173         if (priv->tsb_en)
 174                 reg |= tdma_control_bit(priv, TSB_EN);
 175         else
 176                 reg &= ~tdma_control_bit(priv, TSB_EN);
 177         tdma_writel(priv, reg, TDMA_CONTROL);
 178 }
 179
 180 static int bcm_sysport_set_features(struct net_device *dev,
 181                                     netdev_features_t features)
 182 {
 183         struct bcm_sysport_priv *priv = netdev_priv(dev);
 184
 185         /* Read CRC forward */
 186         if (!priv->is_lite)
 187                 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
 188         else
 189                 priv->crc_fwd = !((gib_readl(priv, GIB_CONTROL) &
 190                                   GIB_FCS_STRIP) >> GIB_FCS_STRIP_SHIFT);
 191
 192         bcm_sysport_set_rx_csum(dev, features);
 193         bcm_sysport_set_tx_csum(dev, features);
 194
 195         return 0;
 196 }
 197
 198 /* Hardware counters must be kept in sync because the order/offset
 199  * is important here (order in structure declaration = order in hardware)
 200  */
 201 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = {
 202         /* general stats */
 203         STAT_NETDEV64(rx_packets),
 204         STAT_NETDEV64(tx_packets),
 205         STAT_NETDEV64(rx_bytes),
 206         STAT_NETDEV64(tx_bytes),
 207         STAT_NETDEV(rx_errors),
 208         STAT_NETDEV(tx_errors),
 209         STAT_NETDEV(rx_dropped),
 210         STAT_NETDEV(tx_dropped),
 211         STAT_NETDEV(multicast),
 212         /* UniMAC RSV counters */
 213         STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
 214         STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
 215         STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
 216         STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
 217         STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
 218         STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
 219         STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
 220         STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
 221         STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
 222         STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
 223         STAT_MIB_RX("rx_pkts", mib.rx.pkt),
 224         STAT_MIB_RX("rx_bytes", mib.rx.bytes),
 225         STAT_MIB_RX("rx_multicast", mib.rx.mca),
 226         STAT_MIB_RX("rx_broadcast", mib.rx.bca),
 227         STAT_MIB_RX("rx_fcs", mib.rx.fcs),
 228         STAT_MIB_RX("rx_control", mib.rx.cf),
 229         STAT_MIB_RX("rx_pause", mib.rx.pf),
 230         STAT_MIB_RX("rx_unknown", mib.rx.uo),
 231         STAT_MIB_RX("rx_align", mib.rx.aln),
 232         STAT_MIB_RX("rx_outrange", mib.rx.flr),
 233         STAT_MIB_RX("rx_code", mib.rx.cde),
 234         STAT_MIB_RX("rx_carrier", mib.rx.fcr),
 235         STAT_MIB_RX("rx_oversize", mib.rx.ovr),
 236         STAT_MIB_RX("rx_jabber", mib.rx.jbr),
 237         STAT_MIB_RX("rx_mtu_err", mib.rx.mtue),
 238         STAT_MIB_RX("rx_good_pkts", mib.rx.pok),
 239         STAT_MIB_RX("rx_unicast", mib.rx.uc),
 240         STAT_MIB_RX("rx_ppp", mib.rx.ppp),
 241         STAT_MIB_RX("rx_crc", mib.rx.rcrc),
 242         /* UniMAC TSV counters */
 243         STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
 244         STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
 245         STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
 246         STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
 247         STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
 248         STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
 249         STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
 250         STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
 251         STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
 252         STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
 253         STAT_MIB_TX("tx_pkts", mib.tx.pkts),
 254         STAT_MIB_TX("tx_multicast", mib.tx.mca),
 255         STAT_MIB_TX("tx_broadcast", mib.tx.bca),
 256         STAT_MIB_TX("tx_pause", mib.tx.pf),
 257         STAT_MIB_TX("tx_control", mib.tx.cf),
 258         STAT_MIB_TX("tx_fcs_err", mib.tx.fcs),
 259         STAT_MIB_TX("tx_oversize", mib.tx.ovr),
 260         STAT_MIB_TX("tx_defer", mib.tx.drf),
 261         STAT_MIB_TX("tx_excess_defer", mib.tx.edf),
 262         STAT_MIB_TX("tx_single_col", mib.tx.scl),
 263         STAT_MIB_TX("tx_multi_col", mib.tx.mcl),
 264         STAT_MIB_TX("tx_late_col", mib.tx.lcl),
 265         STAT_MIB_TX("tx_excess_col", mib.tx.ecl),
 266         STAT_MIB_TX("tx_frags", mib.tx.frg),
 267         STAT_MIB_TX("tx_total_col", mib.tx.ncl),
 268         STAT_MIB_TX("tx_jabber", mib.tx.jbr),
 269         STAT_MIB_TX("tx_bytes", mib.tx.bytes),
 270         STAT_MIB_TX("tx_good_pkts", mib.tx.pok),
 271         STAT_MIB_TX("tx_unicast", mib.tx.uc),
 272         /* UniMAC RUNT counters */
 273         STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
 274         STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
 275         STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
 276         STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
 277         /* RXCHK misc statistics */
 278         STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR),
 279         STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc,
 280                    RXCHK_OTHER_DISC_CNTR),
 281         /* RBUF misc statistics */
 282         STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR),
 283         STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR),
 284         STAT_MIB_SOFT("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
 285         STAT_MIB_SOFT("rx_dma_failed", mib.rx_dma_failed),
 286         STAT_MIB_SOFT("tx_dma_failed", mib.tx_dma_failed),
 287         STAT_MIB_SOFT("tx_realloc_tsb", mib.tx_realloc_tsb),
 288         STAT_MIB_SOFT("tx_realloc_tsb_failed", mib.tx_realloc_tsb_failed),
 289         /* Per TX-queue statistics are dynamically appended */
 290 };
 291
 292 #define BCM_SYSPORT_STATS_LEN   ARRAY_SIZE(bcm_sysport_gstrings_stats)
 293
 294 static void bcm_sysport_get_drvinfo(struct net_device *dev,
 295                                     struct ethtool_drvinfo *info)
 296 {
 297         strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
 298         strlcpy(info->version, "0.1", sizeof(info->version));
 299         strlcpy(info->bus_info, "platform", sizeof(info->bus_info));
 300 }
 301
 302 static u32 bcm_sysport_get_msglvl(struct net_device *dev)
 303 {
 304         struct bcm_sysport_priv *priv = netdev_priv(dev);
 305
 306         return priv->msg_enable;
 307 }
 308
 309 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
 310 {
 311         struct bcm_sysport_priv *priv = netdev_priv(dev);
 312
 313         priv->msg_enable = enable;
 314 }
 315
 316 static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type)
 317 {
 318         switch (type) {
 319         case BCM_SYSPORT_STAT_NETDEV:
 320         case BCM_SYSPORT_STAT_NETDEV64:
 321         case BCM_SYSPORT_STAT_RXCHK:
 322         case BCM_SYSPORT_STAT_RBUF:
 323         case BCM_SYSPORT_STAT_SOFT:
 324                 return true;
 325         default:
 326                 return false;
 327         }
 328 }
 329
 330 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set)
 331 {
 332         struct bcm_sysport_priv *priv = netdev_priv(dev);
 333         const struct bcm_sysport_stats *s;
 334         unsigned int i, j;
 335
 336         switch (string_set) {
 337         case ETH_SS_STATS:
 338                 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 339                         s = &bcm_sysport_gstrings_stats[i];
 340                         if (priv->is_lite &&
 341                             !bcm_sysport_lite_stat_valid(s->type))
 342                                 continue;
 343                         j++;
 344                 }
 345                 /* Include per-queue statistics */
 346                 return j + dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
 347         default:
 348                 return -EOPNOTSUPP;
 349         }
 350 }
 351
 352 static void bcm_sysport_get_strings(struct net_device *dev,
 353                                     u32 stringset, u8 *data)
 354 {
 355         struct bcm_sysport_priv *priv = netdev_priv(dev);
 356         const struct bcm_sysport_stats *s;
 357         char buf[128];
 358         int i, j;
 359
 360         switch (stringset) {
 361         case ETH_SS_STATS:
 362                 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 363                         s = &bcm_sysport_gstrings_stats[i];
 364                         if (priv->is_lite &&
 365                             !bcm_sysport_lite_stat_valid(s->type))
 366                                 continue;
 367
 368                         memcpy(data + j * ETH_GSTRING_LEN, s->stat_string,
 369                                ETH_GSTRING_LEN);
 370                         j++;
 371                 }
 372
 373                 for (i = 0; i < dev->num_tx_queues; i++) {
 374                         snprintf(buf, sizeof(buf), "txq%d_packets", i);
 375                         memcpy(data + j * ETH_GSTRING_LEN, buf,
 376                                ETH_GSTRING_LEN);
 377                         j++;
 378
 379                         snprintf(buf, sizeof(buf), "txq%d_bytes", i);
 380                         memcpy(data + j * ETH_GSTRING_LEN, buf,
 381                                ETH_GSTRING_LEN);
 382                         j++;
 383                 }
 384                 break;
 385         default:
 386                 break;
 387         }
 388 }
 389
 390 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
 391 {
 392         int i, j = 0;
 393
 394         for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 395                 const struct bcm_sysport_stats *s;
 396                 u8 offset = 0;
 397                 u32 val = 0;
 398                 char *p;
 399
 400                 s = &bcm_sysport_gstrings_stats[i];
 401                 switch (s->type) {
 402                 case BCM_SYSPORT_STAT_NETDEV:
 403                 case BCM_SYSPORT_STAT_NETDEV64:
 404                 case BCM_SYSPORT_STAT_SOFT:
 405                         continue;
 406                 case BCM_SYSPORT_STAT_MIB_RX:
 407                 case BCM_SYSPORT_STAT_MIB_TX:
 408                 case BCM_SYSPORT_STAT_RUNT:
 409                         if (priv->is_lite)
 410                                 continue;
 411
 412                         if (s->type != BCM_SYSPORT_STAT_MIB_RX)
 413                                 offset = UMAC_MIB_STAT_OFFSET;
 414                         val = umac_readl(priv, UMAC_MIB_START + j + offset);
 415                         break;
 416                 case BCM_SYSPORT_STAT_RXCHK:
 417                         val = rxchk_readl(priv, s->reg_offset);
 418                         if (val == ~0)
 419                                 rxchk_writel(priv, 0, s->reg_offset);
 420                         break;
 421                 case BCM_SYSPORT_STAT_RBUF:
 422                         val = rbuf_readl(priv, s->reg_offset);
 423                         if (val == ~0)
 424                                 rbuf_writel(priv, 0, s->reg_offset);
 425                         break;
 426                 }
 427
 428                 j += s->stat_sizeof;
 429                 p = (char *)priv + s->stat_offset;
 430                 *(u32 *)p = val;
 431         }
 432
 433         netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
 434 }
 435
 436 static void bcm_sysport_update_tx_stats(struct bcm_sysport_priv *priv,
 437                                         u64 *tx_bytes, u64 *tx_packets)
 438 {
 439         struct bcm_sysport_tx_ring *ring;
 440         u64 bytes = 0, packets = 0;
 441         unsigned int start;
 442         unsigned int q;
 443
 444         for (q = 0; q < priv->netdev->num_tx_queues; q++) {
 445                 ring = &priv->tx_rings[q];
 446                 do {
 447                         start = u64_stats_fetch_begin_irq(&priv->syncp);
 448                         bytes = ring->bytes;
 449                         packets = ring->packets;
 450                 } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
 451
 452                 *tx_bytes += bytes;
 453                 *tx_packets += packets;
 454         }
 455 }
 456
 457 static void bcm_sysport_get_stats(struct net_device *dev,
 458                                   struct ethtool_stats *stats, u64 *data)
 459 {
 460         struct bcm_sysport_priv *priv = netdev_priv(dev);
 461         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
 462         struct u64_stats_sync *syncp = &priv->syncp;
 463         struct bcm_sysport_tx_ring *ring;
 464         u64 tx_bytes = 0, tx_packets = 0;
 465         unsigned int start;
 466         int i, j;
 467
 468         if (netif_running(dev)) {
 469                 bcm_sysport_update_mib_counters(priv);
 470                 bcm_sysport_update_tx_stats(priv, &tx_bytes, &tx_packets);
 471                 stats64->tx_bytes = tx_bytes;
 472                 stats64->tx_packets = tx_packets;
 473         }
 474
 475         for (i =  0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 476                 const struct bcm_sysport_stats *s;
 477                 char *p;
 478
 479                 s = &bcm_sysport_gstrings_stats[i];
 480                 if (s->type == BCM_SYSPORT_STAT_NETDEV)
 481                         p = (char *)&dev->stats;
 482                 else if (s->type == BCM_SYSPORT_STAT_NETDEV64)
 483                         p = (char *)stats64;
 484                 else
 485                         p = (char *)priv;
 486
 487                 if (priv->is_lite && !bcm_sysport_lite_stat_valid(s->type))
 488                         continue;
 489                 p += s->stat_offset;
 490
 491                 if (s->stat_sizeof == sizeof(u64) &&
 492                     s->type == BCM_SYSPORT_STAT_NETDEV64) {
 493                         do {
 494                                 start = u64_stats_fetch_begin_irq(syncp);
 495                                 data[i] = *(u64 *)p;
 496                         } while (u64_stats_fetch_retry_irq(syncp, start));
 497                 } else
 498                         data[i] = *(u32 *)p;
 499                 j++;
 500         }
 501
 502         /* For SYSTEMPORT Lite since we have holes in our statistics, j would
 503          * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it
 504          * needs to point to how many total statistics we have minus the
 505          * number of per TX queue statistics
 506          */
 507         j = bcm_sysport_get_sset_count(dev, ETH_SS_STATS) -
 508             dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
 509
 510         for (i = 0; i < dev->num_tx_queues; i++) {
 511                 ring = &priv->tx_rings[i];
 512                 data[j] = ring->packets;
 513                 j++;
 514                 data[j] = ring->bytes;
 515                 j++;
 516         }
 517 }
 518
 519 static void bcm_sysport_get_wol(struct net_device *dev,
 520                                 struct ethtool_wolinfo *wol)
 521 {
 522         struct bcm_sysport_priv *priv = netdev_priv(dev);
 523         u32 reg;
 524
 525         wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
 526         wol->wolopts = priv->wolopts;
 527
 528         if (!(priv->wolopts & WAKE_MAGICSECURE))
 529                 return;
 530
 531         /* Return the programmed SecureOn password */
 532         reg = umac_readl(priv, UMAC_PSW_MS);
 533         put_unaligned_be16(reg, &wol->sopass[0]);
 534         reg = umac_readl(priv, UMAC_PSW_LS);
 535         put_unaligned_be32(reg, &wol->sopass[2]);
 536 }
 537
 538 static int bcm_sysport_set_wol(struct net_device *dev,
 539                                struct ethtool_wolinfo *wol)
 540 {
 541         struct bcm_sysport_priv *priv = netdev_priv(dev);
 542         struct device *kdev = &priv->pdev->dev;
 543         u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
 544
 545         if (!device_can_wakeup(kdev))
 546                 return -ENOTSUPP;
 547
 548         if (wol->wolopts & ~supported)
 549                 return -EINVAL;
 550
 551         /* Program the SecureOn password */
 552         if (wol->wolopts & WAKE_MAGICSECURE) {
 553                 umac_writel(priv, get_unaligned_be16(&wol->sopass[0]),
 554                             UMAC_PSW_MS);
 555                 umac_writel(priv, get_unaligned_be32(&wol->sopass[2]),
 556                             UMAC_PSW_LS);
 557         }
 558
 559         /* Flag the device and relevant IRQ as wakeup capable */
 560         if (wol->wolopts) {
 561                 device_set_wakeup_enable(kdev, 1);
 562                 if (priv->wol_irq_disabled)
 563                         enable_irq_wake(priv->wol_irq);
 564                 priv->wol_irq_disabled = 0;
 565         } else {
 566                 device_set_wakeup_enable(kdev, 0);
 567                 /* Avoid unbalanced disable_irq_wake calls */
 568                 if (!priv->wol_irq_disabled)
 569                         disable_irq_wake(priv->wol_irq);
 570                 priv->wol_irq_disabled = 1;
 571         }
 572
 573         priv->wolopts = wol->wolopts;
 574
 575         return 0;
 576 }
 577
 578 static void bcm_sysport_set_rx_coalesce(struct bcm_sysport_priv *priv,
 579                                         u32 usecs, u32 pkts)
 580 {
 581         u32 reg;
 582
 583         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 584         reg &= ~(RDMA_INTR_THRESH_MASK |
 585                  RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT);
 586         reg |= pkts;
 587         reg |= DIV_ROUND_UP(usecs * 1000, 8192) << RDMA_TIMEOUT_SHIFT;
 588         rdma_writel(priv, reg, RDMA_MBDONE_INTR);
 589 }
 590
 591 static void bcm_sysport_set_tx_coalesce(struct bcm_sysport_tx_ring *ring,
 592                                         struct ethtool_coalesce *ec)
 593 {
 594         struct bcm_sysport_priv *priv = ring->priv;
 595         u32 reg;
 596
 597         reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(ring->index));
 598         reg &= ~(RING_INTR_THRESH_MASK |
 599                  RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT);
 600         reg |= ec->tx_max_coalesced_frames;
 601         reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) <<
 602                             RING_TIMEOUT_SHIFT;
 603         tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(ring->index));
 604 }
 605
 606 static int bcm_sysport_get_coalesce(struct net_device *dev,
 607                                     struct ethtool_coalesce *ec)
 608 {
 609         struct bcm_sysport_priv *priv = netdev_priv(dev);
 610         u32 reg;
 611
 612         reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0));
 613
 614         ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000;
 615         ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK;
 616
 617         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 618
 619         ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000;
 620         ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK;
 621         ec->use_adaptive_rx_coalesce = priv->dim.use_dim;
 622
 623         return 0;
 624 }
 625
 626 static int bcm_sysport_set_coalesce(struct net_device *dev,
 627                                     struct ethtool_coalesce *ec)
 628 {
 629         struct bcm_sysport_priv *priv = netdev_priv(dev);
 630         struct net_dim_cq_moder moder;
 631         u32 usecs, pkts;
 632         unsigned int i;
 633
 634         /* Base system clock is 125Mhz, DMA timeout is this reference clock
 635          * divided by 1024, which yield roughly 8.192 us, our maximum value has
 636          * to fit in the RING_TIMEOUT_MASK (16 bits).
 637          */
 638         if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
 639             ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
 640             ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
 641             ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
 642                 return -EINVAL;
 643
 644         if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
 645             (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0) ||
 646             ec->use_adaptive_tx_coalesce)
 647                 return -EINVAL;
 648
 649         for (i = 0; i < dev->num_tx_queues; i++)
 650                 bcm_sysport_set_tx_coalesce(&priv->tx_rings[i], ec);
 651
 652         priv->rx_coalesce_usecs = ec->rx_coalesce_usecs;
 653         priv->rx_max_coalesced_frames = ec->rx_max_coalesced_frames;
 654         usecs = priv->rx_coalesce_usecs;
 655         pkts = priv->rx_max_coalesced_frames;
 656
 657         if (ec->use_adaptive_rx_coalesce && !priv->dim.use_dim) {
 658                 moder = net_dim_get_def_rx_moderation(priv->dim.dim.mode);
 659                 usecs = moder.usec;
 660                 pkts = moder.pkts;
 661         }
 662
 663         priv->dim.use_dim = ec->use_adaptive_rx_coalesce;
 664
 665         /* Apply desired coalescing parameters */
 666         bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
 667
 668         return 0;
 669 }
 670
 671 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
 672 {
 673         dev_consume_skb_any(cb->skb);
 674         cb->skb = NULL;
 675         dma_unmap_addr_set(cb, dma_addr, 0);
 676 }
 677
 678 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
 679                                              struct bcm_sysport_cb *cb)
 680 {
 681         struct device *kdev = &priv->pdev->dev;
 682         struct net_device *ndev = priv->netdev;
 683         struct sk_buff *skb, *rx_skb;
 684         dma_addr_t mapping;
 685
 686         /* Allocate a new SKB for a new packet */
 687         skb = netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH);
 688         if (!skb) {
 689                 priv->mib.alloc_rx_buff_failed++;
 690                 netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
 691                 return NULL;
 692         }
 693
 694         mapping = dma_map_single(kdev, skb->data,
 695                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 696         if (dma_mapping_error(kdev, mapping)) {
 697                 priv->mib.rx_dma_failed++;
 698                 dev_kfree_skb_any(skb);
 699                 netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
 700                 return NULL;
 701         }
 702
 703         /* Grab the current SKB on the ring */
 704         rx_skb = cb->skb;
 705         if (likely(rx_skb))
 706                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 707                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 708
 709         /* Put the new SKB on the ring */
 710         cb->skb = skb;
 711         dma_unmap_addr_set(cb, dma_addr, mapping);
 712         dma_desc_set_addr(priv, cb->bd_addr, mapping);
 713
 714         netif_dbg(priv, rx_status, ndev, "RX refill\n");
 715
 716         /* Return the current SKB to the caller */
 717         return rx_skb;
 718 }
 719
 720 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
 721 {
 722         struct bcm_sysport_cb *cb;
 723         struct sk_buff *skb;
 724         unsigned int i;
 725
 726         for (i = 0; i < priv->num_rx_bds; i++) {
 727                 cb = &priv->rx_cbs[i];
 728                 skb = bcm_sysport_rx_refill(priv, cb);
 729                 if (skb)
 730                         dev_kfree_skb(skb);
 731                 if (!cb->skb)
 732                         return -ENOMEM;
 733         }
 734
 735         return 0;
 736 }
 737
 738 /* Poll the hardware for up to budget packets to process */
 739 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
 740                                         unsigned int budget)
 741 {
 742         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
 743         struct net_device *ndev = priv->netdev;
 744         unsigned int processed = 0, to_process;
 745         unsigned int processed_bytes = 0;
 746         struct bcm_sysport_cb *cb;
 747         struct sk_buff *skb;
 748         unsigned int p_index;
 749         u16 len, status;
 750         struct bcm_rsb *rsb;
 751
 752         /* Clear status before servicing to reduce spurious interrupts */
 753         intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR);
 754
 755         /* Determine how much we should process since last call, SYSTEMPORT Lite
 756          * groups the producer and consumer indexes into the same 32-bit
 757          * which we access using RDMA_CONS_INDEX
 758          */
 759         if (!priv->is_lite)
 760                 p_index = rdma_readl(priv, RDMA_PROD_INDEX);
 761         else
 762                 p_index = rdma_readl(priv, RDMA_CONS_INDEX);
 763         p_index &= RDMA_PROD_INDEX_MASK;
 764
 765         to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK;
 766
 767         netif_dbg(priv, rx_status, ndev,
 768                   "p_index=%d rx_c_index=%d to_process=%d\n",
 769                   p_index, priv->rx_c_index, to_process);
 770
 771         while ((processed < to_process) && (processed < budget)) {
 772                 cb = &priv->rx_cbs[priv->rx_read_ptr];
 773                 skb = bcm_sysport_rx_refill(priv, cb);
 774
 775
 776                 /* We do not have a backing SKB, so we do not a corresponding
 777                  * DMA mapping for this incoming packet since
 778                  * bcm_sysport_rx_refill always either has both skb and mapping
 779                  * or none.
 780                  */
 781                 if (unlikely(!skb)) {
 782                         netif_err(priv, rx_err, ndev, "out of memory!\n");
 783                         ndev->stats.rx_dropped++;
 784                         ndev->stats.rx_errors++;
 785                         goto next;
 786                 }
 787
 788                 /* Extract the Receive Status Block prepended */
 789                 rsb = (struct bcm_rsb *)skb->data;
 790                 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
 791                 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
 792                           DESC_STATUS_MASK;
 793
 794                 netif_dbg(priv, rx_status, ndev,
 795                           "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
 796                           p_index, priv->rx_c_index, priv->rx_read_ptr,
 797                           len, status);
 798
 799                 if (unlikely(len > RX_BUF_LENGTH)) {
 800                         netif_err(priv, rx_status, ndev, "oversized packet\n");
 801                         ndev->stats.rx_length_errors++;
 802                         ndev->stats.rx_errors++;
 803                         dev_kfree_skb_any(skb);
 804                         goto next;
 805                 }
 806
 807                 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
 808                         netif_err(priv, rx_status, ndev, "fragmented packet!\n");
 809                         ndev->stats.rx_dropped++;
 810                         ndev->stats.rx_errors++;
 811                         dev_kfree_skb_any(skb);
 812                         goto next;
 813                 }
 814
 815                 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
 816                         netif_err(priv, rx_err, ndev, "error packet\n");
 817                         if (status & RX_STATUS_OVFLOW)
 818                                 ndev->stats.rx_over_errors++;
 819                         ndev->stats.rx_dropped++;
 820                         ndev->stats.rx_errors++;
 821                         dev_kfree_skb_any(skb);
 822                         goto next;
 823                 }
 824
 825                 skb_put(skb, len);
 826
 827                 /* Hardware validated our checksum */
 828                 if (likely(status & DESC_L4_CSUM))
 829                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 830
 831                 /* Hardware pre-pends packets with 2bytes before Ethernet
 832                  * header plus we have the Receive Status Block, strip off all
 833                  * of this from the SKB.
 834                  */
 835                 skb_pull(skb, sizeof(*rsb) + 2);
 836                 len -= (sizeof(*rsb) + 2);
 837                 processed_bytes += len;
 838
 839                 /* UniMAC may forward CRC */
 840                 if (priv->crc_fwd) {
 841                         skb_trim(skb, len - ETH_FCS_LEN);
 842                         len -= ETH_FCS_LEN;
 843                 }
 844
 845                 skb->protocol = eth_type_trans(skb, ndev);
 846                 ndev->stats.rx_packets++;
 847                 ndev->stats.rx_bytes += len;
 848                 u64_stats_update_begin(&priv->syncp);
 849                 stats64->rx_packets++;
 850                 stats64->rx_bytes += len;
 851                 u64_stats_update_end(&priv->syncp);
 852
 853                 napi_gro_receive(&priv->napi, skb);
 854 next:
 855                 processed++;
 856                 priv->rx_read_ptr++;
 857
 858                 if (priv->rx_read_ptr == priv->num_rx_bds)
 859                         priv->rx_read_ptr = 0;
 860         }
 861
 862         priv->dim.packets = processed;
 863         priv->dim.bytes = processed_bytes;
 864
 865         return processed;
 866 }
 867
 868 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring,
 869                                        struct bcm_sysport_cb *cb,
 870                                        unsigned int *bytes_compl,
 871                                        unsigned int *pkts_compl)
 872 {
 873         struct bcm_sysport_priv *priv = ring->priv;
 874         struct device *kdev = &priv->pdev->dev;
 875
 876         if (cb->skb) {
 877                 *bytes_compl += cb->skb->len;
 878                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 879                                  dma_unmap_len(cb, dma_len),
 880                                  DMA_TO_DEVICE);
 881                 (*pkts_compl)++;
 882                 bcm_sysport_free_cb(cb);
 883         /* SKB fragment */
 884         } else if (dma_unmap_addr(cb, dma_addr)) {
 885                 *bytes_compl += dma_unmap_len(cb, dma_len);
 886                 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
 887                                dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
 888                 dma_unmap_addr_set(cb, dma_addr, 0);
 889         }
 890 }
 891
 892 /* Reclaim queued SKBs for transmission completion, lockless version */
 893 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 894                                              struct bcm_sysport_tx_ring *ring)
 895 {
 896         unsigned int pkts_compl = 0, bytes_compl = 0;
 897         struct net_device *ndev = priv->netdev;
 898         unsigned int txbds_processed = 0;
 899         struct bcm_sysport_cb *cb;
 900         unsigned int txbds_ready;
 901         unsigned int c_index;
 902         u32 hw_ind;
 903
 904         /* Clear status before servicing to reduce spurious interrupts */
 905         if (!ring->priv->is_lite)
 906                 intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR);
 907         else
 908                 intrl2_0_writel(ring->priv, BIT(ring->index +
 909                                 INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR);
 910
 911         /* Compute how many descriptors have been processed since last call */
 912         hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
 913         c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
 914         txbds_ready = (c_index - ring->c_index) & RING_CONS_INDEX_MASK;
 915
 916         netif_dbg(priv, tx_done, ndev,
 917                   "ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
 918                   ring->index, ring->c_index, c_index, txbds_ready);
 919
 920         while (txbds_processed < txbds_ready) {
 921                 cb = &ring->cbs[ring->clean_index];
 922                 bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl);
 923
 924                 ring->desc_count++;
 925                 txbds_processed++;
 926
 927                 if (likely(ring->clean_index < ring->size - 1))
 928                         ring->clean_index++;
 929                 else
 930                         ring->clean_index = 0;
 931         }
 932
 933         u64_stats_update_begin(&priv->syncp);
 934         ring->packets += pkts_compl;
 935         ring->bytes += bytes_compl;
 936         u64_stats_update_end(&priv->syncp);
 937
 938         ring->c_index = c_index;
 939
 940         netif_dbg(priv, tx_done, ndev,
 941                   "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
 942                   ring->index, ring->c_index, pkts_compl, bytes_compl);
 943
 944         return pkts_compl;
 945 }
 946
 947 /* Locked version of the per-ring TX reclaim routine */
 948 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 949                                            struct bcm_sysport_tx_ring *ring)
 950 {
 951         struct netdev_queue *txq;
 952         unsigned int released;
 953         unsigned long flags;
 954
 955         txq = netdev_get_tx_queue(priv->netdev, ring->index);
 956
 957         spin_lock_irqsave(&ring->lock, flags);
 958         released = __bcm_sysport_tx_reclaim(priv, ring);
 959         if (released)
 960                 netif_tx_wake_queue(txq);
 961
 962         spin_unlock_irqrestore(&ring->lock, flags);
 963
 964         return released;
 965 }
 966
 967 /* Locked version of the per-ring TX reclaim, but does not wake the queue */
 968 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv,
 969                                  struct bcm_sysport_tx_ring *ring)
 970 {
 971         unsigned long flags;
 972
 973         spin_lock_irqsave(&ring->lock, flags);
 974         __bcm_sysport_tx_reclaim(priv, ring);
 975         spin_unlock_irqrestore(&ring->lock, flags);
 976 }
 977
 978 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
 979 {
 980         struct bcm_sysport_tx_ring *ring =
 981                 container_of(napi, struct bcm_sysport_tx_ring, napi);
 982         unsigned int work_done = 0;
 983
 984         work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
 985
 986         if (work_done == 0) {
 987                 napi_complete(napi);
 988                 /* re-enable TX interrupt */
 989                 if (!ring->priv->is_lite)
 990                         intrl2_1_mask_clear(ring->priv, BIT(ring->index));
 991                 else
 992                         intrl2_0_mask_clear(ring->priv, BIT(ring->index +
 993                                             INTRL2_0_TDMA_MBDONE_SHIFT));
 994
 995                 return 0;
 996         }
 997
 998         return budget;
 999 }
1000
1001 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
1002 {
1003         unsigned int q;
1004
1005         for (q = 0; q < priv->netdev->num_tx_queues; q++)
1006                 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
1007 }
1008
1009 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
1010 {
1011         struct bcm_sysport_priv *priv =
1012                 container_of(napi, struct bcm_sysport_priv, napi);
1013         struct net_dim_sample dim_sample;
1014         unsigned int work_done = 0;
1015
1016         work_done = bcm_sysport_desc_rx(priv, budget);
1017
1018         priv->rx_c_index += work_done;
1019         priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
1020
1021         /* SYSTEMPORT Lite groups the producer/consumer index, producer is
1022          * maintained by HW, but writes to it will be ignore while RDMA
1023          * is active
1024          */
1025         if (!priv->is_lite)
1026                 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
1027         else
1028                 rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX);
1029
1030         if (work_done < budget) {
1031                 napi_complete_done(napi, work_done);
1032                 /* re-enable RX interrupts */
1033                 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
1034         }
1035
1036         if (priv->dim.use_dim) {
1037                 net_dim_sample(priv->dim.event_ctr, priv->dim.packets,
1038                                priv->dim.bytes, &dim_sample);
1039                 net_dim(&priv->dim.dim, dim_sample);
1040         }
1041
1042         return work_done;
1043 }
1044
1045 static void mpd_enable_set(struct bcm_sysport_priv *priv, bool enable)
1046 {
1047         u32 reg, bit;
1048
1049         reg = umac_readl(priv, UMAC_MPD_CTRL);
1050         if (enable)
1051                 reg |= MPD_EN;
1052         else
1053                 reg &= ~MPD_EN;
1054         umac_writel(priv, reg, UMAC_MPD_CTRL);
1055
1056         if (priv->is_lite)
1057                 bit = RBUF_ACPI_EN_LITE;
1058         else
1059                 bit = RBUF_ACPI_EN;
1060
1061         reg = rbuf_readl(priv, RBUF_CONTROL);
1062         if (enable)
1063                 reg |= bit;
1064         else
1065                 reg &= ~bit;
1066         rbuf_writel(priv, reg, RBUF_CONTROL);
1067 }
1068
1069 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
1070 {
1071         u32 reg;
1072
1073         /* Disable RXCHK, active filters and Broadcom tag matching */
1074         reg = rxchk_readl(priv, RXCHK_CONTROL);
1075         reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
1076                  RXCHK_BRCM_TAG_MATCH_SHIFT | RXCHK_EN | RXCHK_BRCM_TAG_EN);
1077         rxchk_writel(priv, reg, RXCHK_CONTROL);
1078
1079         /* Clear the MagicPacket detection logic */
1080         mpd_enable_set(priv, false);
1081
1082         reg = intrl2_0_readl(priv, INTRL2_CPU_STATUS);
1083         if (reg & INTRL2_0_MPD)
1084                 netdev_info(priv->netdev, "Wake-on-LAN (MPD) interrupt!\n");
1085
1086         if (reg & INTRL2_0_BRCM_MATCH_TAG) {
1087                 reg = rxchk_readl(priv, RXCHK_BRCM_TAG_MATCH_STATUS) &
1088                                   RXCHK_BRCM_TAG_MATCH_MASK;
1089                 netdev_info(priv->netdev,
1090                             "Wake-on-LAN (filters 0x%02x) interrupt!\n", reg);
1091         }
1092
1093         netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
1094 }
1095
1096 static void bcm_sysport_dim_work(struct work_struct *work)
1097 {
1098         struct net_dim *dim = container_of(work, struct net_dim, work);
1099         struct bcm_sysport_net_dim *ndim =
1100                         container_of(dim, struct bcm_sysport_net_dim, dim);
1101         struct bcm_sysport_priv *priv =
1102                         container_of(ndim, struct bcm_sysport_priv, dim);
1103         struct net_dim_cq_moder cur_profile =
1104                         net_dim_get_rx_moderation(dim->mode, dim->profile_ix);
1105
1106         bcm_sysport_set_rx_coalesce(priv, cur_profile.usec, cur_profile.pkts);
1107         dim->state = NET_DIM_START_MEASURE;
1108 }
1109
1110 /* RX and misc interrupt routine */
1111 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
1112 {
1113         struct net_device *dev = dev_id;
1114         struct bcm_sysport_priv *priv = netdev_priv(dev);
1115         struct bcm_sysport_tx_ring *txr;
1116         unsigned int ring, ring_bit;
1117
1118         priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
1119                           ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
1120         intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
1121
1122         if (unlikely(priv->irq0_stat == 0)) {
1123                 netdev_warn(priv->netdev, "spurious RX interrupt\n");
1124                 return IRQ_NONE;
1125         }
1126
1127         if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
1128                 priv->dim.event_ctr++;
1129                 if (likely(napi_schedule_prep(&priv->napi))) {
1130                         /* disable RX interrupts */
1131                         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
1132                         __napi_schedule_irqoff(&priv->napi);
1133                 }
1134         }
1135
1136         /* TX ring is full, perform a full reclaim since we do not know
1137          * which one would trigger this interrupt
1138          */
1139         if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
1140                 bcm_sysport_tx_reclaim_all(priv);
1141
1142         if (!priv->is_lite)
1143                 goto out;
1144
1145         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1146                 ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT);
1147                 if (!(priv->irq0_stat & ring_bit))
1148                         continue;
1149
1150                 txr = &priv->tx_rings[ring];
1151
1152                 if (likely(napi_schedule_prep(&txr->napi))) {
1153                         intrl2_0_mask_set(priv, ring_bit);
1154                         __napi_schedule(&txr->napi);
1155                 }
1156         }
1157 out:
1158         return IRQ_HANDLED;
1159 }
1160
1161 /* TX interrupt service routine */
1162 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
1163 {
1164         struct net_device *dev = dev_id;
1165         struct bcm_sysport_priv *priv = netdev_priv(dev);
1166         struct bcm_sysport_tx_ring *txr;
1167         unsigned int ring;
1168
1169         priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
1170                                 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
1171         intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1172
1173         if (unlikely(priv->irq1_stat == 0)) {
1174                 netdev_warn(priv->netdev, "spurious TX interrupt\n");
1175                 return IRQ_NONE;
1176         }
1177
1178         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1179                 if (!(priv->irq1_stat & BIT(ring)))
1180                         continue;
1181
1182                 txr = &priv->tx_rings[ring];
1183
1184                 if (likely(napi_schedule_prep(&txr->napi))) {
1185                         intrl2_1_mask_set(priv, BIT(ring));
1186                         __napi_schedule_irqoff(&txr->napi);
1187                 }
1188         }
1189
1190         return IRQ_HANDLED;
1191 }
1192
1193 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
1194 {
1195         struct bcm_sysport_priv *priv = dev_id;
1196
1197         pm_wakeup_event(&priv->pdev->dev, 0);
1198
1199         return IRQ_HANDLED;
1200 }
1201
1202 #ifdef CONFIG_NET_POLL_CONTROLLER
1203 static void bcm_sysport_poll_controller(struct net_device *dev)
1204 {
1205         struct bcm_sysport_priv *priv = netdev_priv(dev);
1206
1207         disable_irq(priv->irq0);
1208         bcm_sysport_rx_isr(priv->irq0, priv);
1209         enable_irq(priv->irq0);
1210
1211         if (!priv->is_lite) {
1212                 disable_irq(priv->irq1);
1213                 bcm_sysport_tx_isr(priv->irq1, priv);
1214                 enable_irq(priv->irq1);
1215         }
1216 }
1217 #endif
1218
1219 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
1220                                               struct net_device *dev)
1221 {
1222         struct bcm_sysport_priv *priv = netdev_priv(dev);
1223         struct sk_buff *nskb;
1224         struct bcm_tsb *tsb;
1225         u32 csum_info;
1226         u8 ip_proto;
1227         u16 csum_start;
1228         __be16 ip_ver;
1229
1230         /* Re-allocate SKB if needed */
1231         if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
1232                 nskb = skb_realloc_headroom(skb, sizeof(*tsb));
1233                 if (!nskb) {
1234                         dev_kfree_skb_any(skb);
1235                         priv->mib.tx_realloc_tsb_failed++;
1236                         dev->stats.tx_errors++;
1237                         dev->stats.tx_dropped++;
1238                         return NULL;
1239                 }
1240                 dev_consume_skb_any(skb);
1241                 skb = nskb;
1242                 priv->mib.tx_realloc_tsb++;
1243         }
1244
1245         tsb = skb_push(skb, sizeof(*tsb));
1246         /* Zero-out TSB by default */
1247         memset(tsb, 0, sizeof(*tsb));
1248
1249         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1250                 ip_ver = skb->protocol;
1251                 switch (ip_ver) {
1252                 case htons(ETH_P_IP):
1253                         ip_proto = ip_hdr(skb)->protocol;
1254                         break;
1255                 case htons(ETH_P_IPV6):
1256                         ip_proto = ipv6_hdr(skb)->nexthdr;
1257                         break;
1258                 default:
1259                         return skb;
1260                 }
1261
1262                 /* Get the checksum offset and the L4 (transport) offset */
1263                 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
1264                 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
1265                 csum_info |= (csum_start << L4_PTR_SHIFT);
1266
1267                 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1268                         csum_info |= L4_LENGTH_VALID;
1269                         if (ip_proto == IPPROTO_UDP &&
1270                             ip_ver == htons(ETH_P_IP))
1271                                 csum_info |= L4_UDP;
1272                 } else {
1273                         csum_info = 0;
1274                 }
1275
1276                 tsb->l4_ptr_dest_map = csum_info;
1277         }
1278
1279         return skb;
1280 }
1281
1282 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
1283                                     struct net_device *dev)
1284 {
1285         struct bcm_sysport_priv *priv = netdev_priv(dev);
1286         struct device *kdev = &priv->pdev->dev;
1287         struct bcm_sysport_tx_ring *ring;
1288         struct bcm_sysport_cb *cb;
1289         struct netdev_queue *txq;
1290         struct dma_desc *desc;
1291         unsigned int skb_len;
1292         unsigned long flags;
1293         dma_addr_t mapping;
1294         u32 len_status;
1295         u16 queue;
1296         int ret;
1297
1298         queue = skb_get_queue_mapping(skb);
1299         txq = netdev_get_tx_queue(dev, queue);
1300         ring = &priv->tx_rings[queue];
1301
1302         /* lock against tx reclaim in BH context and TX ring full interrupt */
1303         spin_lock_irqsave(&ring->lock, flags);
1304         if (unlikely(ring->desc_count == 0)) {
1305                 netif_tx_stop_queue(txq);
1306                 netdev_err(dev, "queue %d awake and ring full!\n", queue);
1307                 ret = NETDEV_TX_BUSY;
1308                 goto out;
1309         }
1310
1311         /* Insert TSB and checksum infos */
1312         if (priv->tsb_en) {
1313                 skb = bcm_sysport_insert_tsb(skb, dev);
1314                 if (!skb) {
1315                         ret = NETDEV_TX_OK;
1316                         goto out;
1317                 }
1318         }
1319
1320         skb_len = skb->len;
1321
1322         mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1323         if (dma_mapping_error(kdev, mapping)) {
1324                 priv->mib.tx_dma_failed++;
1325                 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
1326                           skb->data, skb_len);
1327                 ret = NETDEV_TX_OK;
1328                 goto out;
1329         }
1330
1331         /* Remember the SKB for future freeing */
1332         cb = &ring->cbs[ring->curr_desc];
1333         cb->skb = skb;
1334         dma_unmap_addr_set(cb, dma_addr, mapping);
1335         dma_unmap_len_set(cb, dma_len, skb_len);
1336
1337         /* Fetch a descriptor entry from our pool */
1338         desc = ring->desc_cpu;
1339
1340         desc->addr_lo = lower_32_bits(mapping);
1341         len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
1342         len_status |= (skb_len << DESC_LEN_SHIFT);
1343         len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
1344                        DESC_STATUS_SHIFT;
1345         if (skb->ip_summed == CHECKSUM_PARTIAL)
1346                 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1347
1348         ring->curr_desc++;
1349         if (ring->curr_desc == ring->size)
1350                 ring->curr_desc = 0;
1351         ring->desc_count--;
1352
1353         /* Ensure write completion of the descriptor status/length
1354          * in DRAM before the System Port WRITE_PORT register latches
1355          * the value
1356          */
1357         wmb();
1358         desc->addr_status_len = len_status;
1359         wmb();
1360
1361         /* Write this descriptor address to the RING write port */
1362         tdma_port_write_desc_addr(priv, desc, ring->index);
1363
1364         /* Check ring space and update SW control flow */
1365         if (ring->desc_count == 0)
1366                 netif_tx_stop_queue(txq);
1367
1368         netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
1369                   ring->index, ring->desc_count, ring->curr_desc);
1370
1371         ret = NETDEV_TX_OK;
1372 out:
1373         spin_unlock_irqrestore(&ring->lock, flags);
1374         return ret;
1375 }
1376
1377 static void bcm_sysport_tx_timeout(struct net_device *dev)
1378 {
1379         netdev_warn(dev, "transmit timeout!\n");
1380
1381         netif_trans_update(dev);
1382         dev->stats.tx_errors++;
1383
1384         netif_tx_wake_all_queues(dev);
1385 }
1386
1387 /* phylib adjust link callback */
1388 static void bcm_sysport_adj_link(struct net_device *dev)
1389 {
1390         struct bcm_sysport_priv *priv = netdev_priv(dev);
1391         struct phy_device *phydev = dev->phydev;
1392         unsigned int changed = 0;
1393         u32 cmd_bits = 0, reg;
1394
1395         if (priv->old_link != phydev->link) {
1396                 changed = 1;
1397                 priv->old_link = phydev->link;
1398         }
1399
1400         if (priv->old_duplex != phydev->duplex) {
1401                 changed = 1;
1402                 priv->old_duplex = phydev->duplex;
1403         }
1404
1405         if (priv->is_lite)
1406                 goto out;
1407
1408         switch (phydev->speed) {
1409         case SPEED_2500:
1410                 cmd_bits = CMD_SPEED_2500;
1411                 break;
1412         case SPEED_1000:
1413                 cmd_bits = CMD_SPEED_1000;
1414                 break;
1415         case SPEED_100:
1416                 cmd_bits = CMD_SPEED_100;
1417                 break;
1418         case SPEED_10:
1419                 cmd_bits = CMD_SPEED_10;
1420                 break;
1421         default:
1422                 break;
1423         }
1424         cmd_bits <<= CMD_SPEED_SHIFT;
1425
1426         if (phydev->duplex == DUPLEX_HALF)
1427                 cmd_bits |= CMD_HD_EN;
1428
1429         if (priv->old_pause != phydev->pause) {
1430                 changed = 1;
1431                 priv->old_pause = phydev->pause;
1432         }
1433
1434         if (!phydev->pause)
1435                 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1436
1437         if (!changed)
1438                 return;
1439
1440         if (phydev->link) {
1441                 reg = umac_readl(priv, UMAC_CMD);
1442                 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
1443                         CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1444                         CMD_TX_PAUSE_IGNORE);
1445                 reg |= cmd_bits;
1446                 umac_writel(priv, reg, UMAC_CMD);
1447         }
1448 out:
1449         if (changed)
1450                 phy_print_status(phydev);
1451 }
1452
1453 static void bcm_sysport_init_dim(struct bcm_sysport_priv *priv,
1454                                  void (*cb)(struct work_struct *work))
1455 {
1456         struct bcm_sysport_net_dim *dim = &priv->dim;
1457
1458         INIT_WORK(&dim->dim.work, cb);
1459         dim->dim.mode = NET_DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1460         dim->event_ctr = 0;
1461         dim->packets = 0;
1462         dim->bytes = 0;
1463 }
1464
1465 static void bcm_sysport_init_rx_coalesce(struct bcm_sysport_priv *priv)
1466 {
1467         struct bcm_sysport_net_dim *dim = &priv->dim;
1468         struct net_dim_cq_moder moder;
1469         u32 usecs, pkts;
1470
1471         usecs = priv->rx_coalesce_usecs;
1472         pkts = priv->rx_max_coalesced_frames;
1473
1474         /* If DIM was enabled, re-apply default parameters */
1475         if (dim->use_dim) {
1476                 moder = net_dim_get_def_rx_moderation(dim->dim.mode);
1477                 usecs = moder.usec;
1478                 pkts = moder.pkts;
1479         }
1480
1481         bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
1482 }
1483
1484 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1485                                     unsigned int index)
1486 {
1487         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1488         struct device *kdev = &priv->pdev->dev;
1489         size_t size;
1490         void *p;
1491         u32 reg;
1492
1493         /* Simple descriptors partitioning for now */
1494         size = 256;
1495
1496         /* We just need one DMA descriptor which is DMA-able, since writing to
1497          * the port will allocate a new descriptor in its internal linked-list
1498          */
1499         p = dma_zalloc_coherent(kdev, sizeof(struct dma_desc), &ring->desc_dma,
1500                                 GFP_KERNEL);
1501         if (!p) {
1502                 netif_err(priv, hw, priv->netdev, "DMA alloc failed\n");
1503                 return -ENOMEM;
1504         }
1505
1506         ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1507         if (!ring->cbs) {
1508                 dma_free_coherent(kdev, sizeof(struct dma_desc),
1509                                   ring->desc_cpu, ring->desc_dma);
1510                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1511                 return -ENOMEM;
1512         }
1513
1514         /* Initialize SW view of the ring */
1515         spin_lock_init(&ring->lock);
1516         ring->priv = priv;
1517         netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64);
1518         ring->index = index;
1519         ring->size = size;
1520         ring->clean_index = 0;
1521         ring->alloc_size = ring->size;
1522         ring->desc_cpu = p;
1523         ring->desc_count = ring->size;
1524         ring->curr_desc = 0;
1525
1526         /* Initialize HW ring */
1527         tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1528         tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1529         tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1530         tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1531
1532         /* Configure QID and port mapping */
1533         reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index));
1534         reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT);
1535         if (ring->inspect) {
1536                 reg |= ring->switch_queue & RING_QID_MASK;
1537                 reg |= ring->switch_port << RING_PORT_ID_SHIFT;
1538         } else {
1539                 reg |= RING_IGNORE_STATUS;
1540         }
1541         tdma_writel(priv, reg, TDMA_DESC_RING_MAPPING(index));
1542         tdma_writel(priv, 0, TDMA_DESC_RING_PCP_DEI_VID(index));
1543
1544         /* Enable ACB algorithm 2 */
1545         reg = tdma_readl(priv, TDMA_CONTROL);
1546         reg |= tdma_control_bit(priv, ACB_ALGO);
1547         tdma_writel(priv, reg, TDMA_CONTROL);
1548
1549         /* Do not use tdma_control_bit() here because TSB_SWAP1 collides
1550          * with the original definition of ACB_ALGO
1551          */
1552         reg = tdma_readl(priv, TDMA_CONTROL);
1553         if (priv->is_lite)
1554                 reg &= ~BIT(TSB_SWAP1);
1555         /* Set a correct TSB format based on host endian */
1556         if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1557                 reg |= tdma_control_bit(priv, TSB_SWAP0);
1558         else
1559                 reg &= ~tdma_control_bit(priv, TSB_SWAP0);
1560         tdma_writel(priv, reg, TDMA_CONTROL);
1561
1562         /* Program the number of descriptors as MAX_THRESHOLD and half of
1563          * its size for the hysteresis trigger
1564          */
1565         tdma_writel(priv, ring->size |
1566                         1 << RING_HYST_THRESH_SHIFT,
1567                         TDMA_DESC_RING_MAX_HYST(index));
1568
1569         /* Enable the ring queue in the arbiter */
1570         reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1571         reg |= (1 << index);
1572         tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1573
1574         napi_enable(&ring->napi);
1575
1576         netif_dbg(priv, hw, priv->netdev,
1577                   "TDMA cfg, size=%d, desc_cpu=%p switch q=%d,port=%d\n",
1578                   ring->size, ring->desc_cpu, ring->switch_queue,
1579                   ring->switch_port);
1580
1581         return 0;
1582 }
1583
1584 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1585                                      unsigned int index)
1586 {
1587         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1588         struct device *kdev = &priv->pdev->dev;
1589         u32 reg;
1590
1591         /* Caller should stop the TDMA engine */
1592         reg = tdma_readl(priv, TDMA_STATUS);
1593         if (!(reg & TDMA_DISABLED))
1594                 netdev_warn(priv->netdev, "TDMA not stopped!\n");
1595
1596         /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1597          * fail, so by checking this pointer we know whether the TX ring was
1598          * fully initialized or not.
1599          */
1600         if (!ring->cbs)
1601                 return;
1602
1603         napi_disable(&ring->napi);
1604         netif_napi_del(&ring->napi);
1605
1606         bcm_sysport_tx_clean(priv, ring);
1607
1608         kfree(ring->cbs);
1609         ring->cbs = NULL;
1610
1611         if (ring->desc_dma) {
1612                 dma_free_coherent(kdev, sizeof(struct dma_desc),
1613                                   ring->desc_cpu, ring->desc_dma);
1614                 ring->desc_dma = 0;
1615         }
1616         ring->size = 0;
1617         ring->alloc_size = 0;
1618
1619         netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1620 }
1621
1622 /* RDMA helper */
1623 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1624                                   unsigned int enable)
1625 {
1626         unsigned int timeout = 1000;
1627         u32 reg;
1628
1629         reg = rdma_readl(priv, RDMA_CONTROL);
1630         if (enable)
1631                 reg |= RDMA_EN;
1632         else
1633                 reg &= ~RDMA_EN;
1634         rdma_writel(priv, reg, RDMA_CONTROL);
1635
1636         /* Poll for RMDA disabling completion */
1637         do {
1638                 reg = rdma_readl(priv, RDMA_STATUS);
1639                 if (!!(reg & RDMA_DISABLED) == !enable)
1640                         return 0;
1641                 usleep_range(1000, 2000);
1642         } while (timeout-- > 0);
1643
1644         netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1645
1646         return -ETIMEDOUT;
1647 }
1648
1649 /* TDMA helper */
1650 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1651                                   unsigned int enable)
1652 {
1653         unsigned int timeout = 1000;
1654         u32 reg;
1655
1656         reg = tdma_readl(priv, TDMA_CONTROL);
1657         if (enable)
1658                 reg |= tdma_control_bit(priv, TDMA_EN);
1659         else
1660                 reg &= ~tdma_control_bit(priv, TDMA_EN);
1661         tdma_writel(priv, reg, TDMA_CONTROL);
1662
1663         /* Poll for TMDA disabling completion */
1664         do {
1665                 reg = tdma_readl(priv, TDMA_STATUS);
1666                 if (!!(reg & TDMA_DISABLED) == !enable)
1667                         return 0;
1668
1669                 usleep_range(1000, 2000);
1670         } while (timeout-- > 0);
1671
1672         netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1673
1674         return -ETIMEDOUT;
1675 }
1676
1677 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1678 {
1679         struct bcm_sysport_cb *cb;
1680         u32 reg;
1681         int ret;
1682         int i;
1683
1684         /* Initialize SW view of the RX ring */
1685         priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC;
1686         priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1687         priv->rx_c_index = 0;
1688         priv->rx_read_ptr = 0;
1689         priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1690                                 GFP_KERNEL);
1691         if (!priv->rx_cbs) {
1692                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1693                 return -ENOMEM;
1694         }
1695
1696         for (i = 0; i < priv->num_rx_bds; i++) {
1697                 cb = priv->rx_cbs + i;
1698                 cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1699         }
1700
1701         ret = bcm_sysport_alloc_rx_bufs(priv);
1702         if (ret) {
1703                 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1704                 return ret;
1705         }
1706
1707         /* Initialize HW, ensure RDMA is disabled */
1708         reg = rdma_readl(priv, RDMA_STATUS);
1709         if (!(reg & RDMA_DISABLED))
1710                 rdma_enable_set(priv, 0);
1711
1712         rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1713         rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1714         rdma_writel(priv, 0, RDMA_PROD_INDEX);
1715         rdma_writel(priv, 0, RDMA_CONS_INDEX);
1716         rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1717                           RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1718         /* Operate the queue in ring mode */
1719         rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1720         rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1721         rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1722         rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO);
1723
1724         netif_dbg(priv, hw, priv->netdev,
1725                   "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1726                   priv->num_rx_bds, priv->rx_bds);
1727
1728         return 0;
1729 }
1730
1731 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1732 {
1733         struct bcm_sysport_cb *cb;
1734         unsigned int i;
1735         u32 reg;
1736
1737         /* Caller should ensure RDMA is disabled */
1738         reg = rdma_readl(priv, RDMA_STATUS);
1739         if (!(reg & RDMA_DISABLED))
1740                 netdev_warn(priv->netdev, "RDMA not stopped!\n");
1741
1742         for (i = 0; i < priv->num_rx_bds; i++) {
1743                 cb = &priv->rx_cbs[i];
1744                 if (dma_unmap_addr(cb, dma_addr))
1745                         dma_unmap_single(&priv->pdev->dev,
1746                                          dma_unmap_addr(cb, dma_addr),
1747                                          RX_BUF_LENGTH, DMA_FROM_DEVICE);
1748                 bcm_sysport_free_cb(cb);
1749         }
1750
1751         kfree(priv->rx_cbs);
1752         priv->rx_cbs = NULL;
1753
1754         netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1755 }
1756
1757 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1758 {
1759         struct bcm_sysport_priv *priv = netdev_priv(dev);
1760         u32 reg;
1761
1762         if (priv->is_lite)
1763                 return;
1764
1765         reg = umac_readl(priv, UMAC_CMD);
1766         if (dev->flags & IFF_PROMISC)
1767                 reg |= CMD_PROMISC;
1768         else
1769                 reg &= ~CMD_PROMISC;
1770         umac_writel(priv, reg, UMAC_CMD);
1771
1772         /* No support for ALLMULTI */
1773         if (dev->flags & IFF_ALLMULTI)
1774                 return;
1775 }
1776
1777 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1778                                    u32 mask, unsigned int enable)
1779 {
1780         u32 reg;
1781
1782         if (!priv->is_lite) {
1783                 reg = umac_readl(priv, UMAC_CMD);
1784                 if (enable)
1785                         reg |= mask;
1786                 else
1787                         reg &= ~mask;
1788                 umac_writel(priv, reg, UMAC_CMD);
1789         } else {
1790                 reg = gib_readl(priv, GIB_CONTROL);
1791                 if (enable)
1792                         reg |= mask;
1793                 else
1794                         reg &= ~mask;
1795                 gib_writel(priv, reg, GIB_CONTROL);
1796         }
1797
1798         /* UniMAC stops on a packet boundary, wait for a full-sized packet
1799          * to be processed (1 msec).
1800          */
1801         if (enable == 0)
1802                 usleep_range(1000, 2000);
1803 }
1804
1805 static inline void umac_reset(struct bcm_sysport_priv *priv)
1806 {
1807         u32 reg;
1808
1809         if (priv->is_lite)
1810                 return;
1811
1812         reg = umac_readl(priv, UMAC_CMD);
1813         reg |= CMD_SW_RESET;
1814         umac_writel(priv, reg, UMAC_CMD);
1815         udelay(10);
1816         reg = umac_readl(priv, UMAC_CMD);
1817         reg &= ~CMD_SW_RESET;
1818         umac_writel(priv, reg, UMAC_CMD);
1819 }
1820
1821 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1822                              unsigned char *addr)
1823 {
1824         u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) |
1825                     addr[3];
1826         u32 mac1 = (addr[4] << 8) | addr[5];
1827
1828         if (!priv->is_lite) {
1829                 umac_writel(priv, mac0, UMAC_MAC0);
1830                 umac_writel(priv, mac1, UMAC_MAC1);
1831         } else {
1832                 gib_writel(priv, mac0, GIB_MAC0);
1833                 gib_writel(priv, mac1, GIB_MAC1);
1834         }
1835 }
1836
1837 static void topctrl_flush(struct bcm_sysport_priv *priv)
1838 {
1839         topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1840         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1841         mdelay(1);
1842         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1843         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1844 }
1845
1846 static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1847 {
1848         struct bcm_sysport_priv *priv = netdev_priv(dev);
1849         struct sockaddr *addr = p;
1850
1851         if (!is_valid_ether_addr(addr->sa_data))
1852                 return -EINVAL;
1853
1854         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1855
1856         /* interface is disabled, changes to MAC will be reflected on next
1857          * open call
1858          */
1859         if (!netif_running(dev))
1860                 return 0;
1861
1862         umac_set_hw_addr(priv, dev->dev_addr);
1863
1864         return 0;
1865 }
1866
1867 static void bcm_sysport_get_stats64(struct net_device *dev,
1868                                     struct rtnl_link_stats64 *stats)
1869 {
1870         struct bcm_sysport_priv *priv = netdev_priv(dev);
1871         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
1872         unsigned int start;
1873
1874         netdev_stats_to_stats64(stats, &dev->stats);
1875
1876         bcm_sysport_update_tx_stats(priv, &stats->tx_bytes,
1877                                     &stats->tx_packets);
1878
1879         do {
1880                 start = u64_stats_fetch_begin_irq(&priv->syncp);
1881                 stats->rx_packets = stats64->rx_packets;
1882                 stats->rx_bytes = stats64->rx_bytes;
1883         } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
1884 }
1885
1886 static void bcm_sysport_netif_start(struct net_device *dev)
1887 {
1888         struct bcm_sysport_priv *priv = netdev_priv(dev);
1889
1890         /* Enable NAPI */
1891         bcm_sysport_init_dim(priv, bcm_sysport_dim_work);
1892         bcm_sysport_init_rx_coalesce(priv);
1893         napi_enable(&priv->napi);
1894
1895         /* Enable RX interrupt and TX ring full interrupt */
1896         intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1897
1898         phy_start(dev->phydev);
1899
1900         /* Enable TX interrupts for the TXQs */
1901         if (!priv->is_lite)
1902                 intrl2_1_mask_clear(priv, 0xffffffff);
1903         else
1904                 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK);
1905 }
1906
1907 static void rbuf_init(struct bcm_sysport_priv *priv)
1908 {
1909         u32 reg;
1910
1911         reg = rbuf_readl(priv, RBUF_CONTROL);
1912         reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1913         /* Set a correct RSB format on SYSTEMPORT Lite */
1914         if (priv->is_lite)
1915                 reg &= ~RBUF_RSB_SWAP1;
1916
1917         /* Set a correct RSB format based on host endian */
1918         if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1919                 reg |= RBUF_RSB_SWAP0;
1920         else
1921                 reg &= ~RBUF_RSB_SWAP0;
1922         rbuf_writel(priv, reg, RBUF_CONTROL);
1923 }
1924
1925 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv)
1926 {
1927         intrl2_0_mask_set(priv, 0xffffffff);
1928         intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1929         if (!priv->is_lite) {
1930                 intrl2_1_mask_set(priv, 0xffffffff);
1931                 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1932         }
1933 }
1934
1935 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv)
1936 {
1937         u32 reg;
1938
1939         reg = gib_readl(priv, GIB_CONTROL);
1940         /* Include Broadcom tag in pad extension and fix up IPG_LENGTH */
1941         if (netdev_uses_dsa(priv->netdev)) {
1942                 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT);
1943                 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT;
1944         }
1945         reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT);
1946         reg |= 12 << GIB_IPG_LEN_SHIFT;
1947         gib_writel(priv, reg, GIB_CONTROL);
1948 }
1949
1950 static int bcm_sysport_open(struct net_device *dev)
1951 {
1952         struct bcm_sysport_priv *priv = netdev_priv(dev);
1953         struct phy_device *phydev;
1954         unsigned int i;
1955         int ret;
1956
1957         /* Reset UniMAC */
1958         umac_reset(priv);
1959
1960         /* Flush TX and RX FIFOs at TOPCTRL level */
1961         topctrl_flush(priv);
1962
1963         /* Disable the UniMAC RX/TX */
1964         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1965
1966         /* Enable RBUF 2bytes alignment and Receive Status Block */
1967         rbuf_init(priv);
1968
1969         /* Set maximum frame length */
1970         if (!priv->is_lite)
1971                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1972         else
1973                 gib_set_pad_extension(priv);
1974
1975         /* Apply features again in case we changed them while interface was
1976          * down
1977          */
1978         bcm_sysport_set_features(dev, dev->features);
1979
1980         /* Set MAC address */
1981         umac_set_hw_addr(priv, dev->dev_addr);
1982
1983         phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1984                                 0, priv->phy_interface);
1985         if (!phydev) {
1986                 netdev_err(dev, "could not attach to PHY\n");
1987                 return -ENODEV;
1988         }
1989
1990         /* Reset house keeping link status */
1991         priv->old_duplex = -1;
1992         priv->old_link = -1;
1993         priv->old_pause = -1;
1994
1995         /* mask all interrupts and request them */
1996         bcm_sysport_mask_all_intrs(priv);
1997
1998         ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
1999         if (ret) {
2000                 netdev_err(dev, "failed to request RX interrupt\n");
2001                 goto out_phy_disconnect;
2002         }
2003
2004         if (!priv->is_lite) {
2005                 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0,
2006                                   dev->name, dev);
2007                 if (ret) {
2008                         netdev_err(dev, "failed to request TX interrupt\n");
2009                         goto out_free_irq0;
2010                 }
2011         }
2012
2013         /* Initialize both hardware and software ring */
2014         for (i = 0; i < dev->num_tx_queues; i++) {
2015                 ret = bcm_sysport_init_tx_ring(priv, i);
2016                 if (ret) {
2017                         netdev_err(dev, "failed to initialize TX ring %d\n",
2018                                    i);
2019                         goto out_free_tx_ring;
2020                 }
2021         }
2022
2023         /* Initialize linked-list */
2024         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2025
2026         /* Initialize RX ring */
2027         ret = bcm_sysport_init_rx_ring(priv);
2028         if (ret) {
2029                 netdev_err(dev, "failed to initialize RX ring\n");
2030                 goto out_free_rx_ring;
2031         }
2032
2033         /* Turn on RDMA */
2034         ret = rdma_enable_set(priv, 1);
2035         if (ret)
2036                 goto out_free_rx_ring;
2037
2038         /* Turn on TDMA */
2039         ret = tdma_enable_set(priv, 1);
2040         if (ret)
2041                 goto out_clear_rx_int;
2042
2043         /* Turn on UniMAC TX/RX */
2044         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
2045
2046         bcm_sysport_netif_start(dev);
2047
2048         netif_tx_start_all_queues(dev);
2049
2050         return 0;
2051
2052 out_clear_rx_int:
2053         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
2054 out_free_rx_ring:
2055         bcm_sysport_fini_rx_ring(priv);
2056 out_free_tx_ring:
2057         for (i = 0; i < dev->num_tx_queues; i++)
2058                 bcm_sysport_fini_tx_ring(priv, i);
2059         if (!priv->is_lite)
2060                 free_irq(priv->irq1, dev);
2061 out_free_irq0:
2062         free_irq(priv->irq0, dev);
2063 out_phy_disconnect:
2064         phy_disconnect(phydev);
2065         return ret;
2066 }
2067
2068 static void bcm_sysport_netif_stop(struct net_device *dev)
2069 {
2070         struct bcm_sysport_priv *priv = netdev_priv(dev);
2071
2072         /* stop all software from updating hardware */
2073         netif_tx_disable(dev);
2074         napi_disable(&priv->napi);
2075         cancel_work_sync(&priv->dim.dim.work);
2076         phy_stop(dev->phydev);
2077
2078         /* mask all interrupts */
2079         bcm_sysport_mask_all_intrs(priv);
2080 }
2081
2082 static int bcm_sysport_stop(struct net_device *dev)
2083 {
2084         struct bcm_sysport_priv *priv = netdev_priv(dev);
2085         unsigned int i;
2086         int ret;
2087
2088         bcm_sysport_netif_stop(dev);
2089
2090         /* Disable UniMAC RX */
2091         umac_enable_set(priv, CMD_RX_EN, 0);
2092
2093         ret = tdma_enable_set(priv, 0);
2094         if (ret) {
2095                 netdev_err(dev, "timeout disabling RDMA\n");
2096                 return ret;
2097         }
2098
2099         /* Wait for a maximum packet size to be drained */
2100         usleep_range(2000, 3000);
2101
2102         ret = rdma_enable_set(priv, 0);
2103         if (ret) {
2104                 netdev_err(dev, "timeout disabling TDMA\n");
2105                 return ret;
2106         }
2107
2108         /* Disable UniMAC TX */
2109         umac_enable_set(priv, CMD_TX_EN, 0);
2110
2111         /* Free RX/TX rings SW structures */
2112         for (i = 0; i < dev->num_tx_queues; i++)
2113                 bcm_sysport_fini_tx_ring(priv, i);
2114         bcm_sysport_fini_rx_ring(priv);
2115
2116         free_irq(priv->irq0, dev);
2117         if (!priv->is_lite)
2118                 free_irq(priv->irq1, dev);
2119
2120         /* Disconnect from PHY */
2121         phy_disconnect(dev->phydev);
2122
2123         return 0;
2124 }
2125
2126 static int bcm_sysport_rule_find(struct bcm_sysport_priv *priv,
2127                                  u64 location)
2128 {
2129         unsigned int index;
2130         u32 reg;
2131
2132         for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2133                 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2134                 reg >>= RXCHK_BRCM_TAG_CID_SHIFT;
2135                 reg &= RXCHK_BRCM_TAG_CID_MASK;
2136                 if (reg == location)
2137                         return index;
2138         }
2139
2140         return -EINVAL;
2141 }
2142
2143 static int bcm_sysport_rule_get(struct bcm_sysport_priv *priv,
2144                                 struct ethtool_rxnfc *nfc)
2145 {
2146         int index;
2147
2148         /* This is not a rule that we know about */
2149         index = bcm_sysport_rule_find(priv, nfc->fs.location);
2150         if (index < 0)
2151                 return -EOPNOTSUPP;
2152
2153         nfc->fs.ring_cookie = RX_CLS_FLOW_WAKE;
2154
2155         return 0;
2156 }
2157
2158 static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv,
2159                                 struct ethtool_rxnfc *nfc)
2160 {
2161         unsigned int index;
2162         u32 reg;
2163
2164         /* We cannot match locations greater than what the classification ID
2165          * permits (256 entries)
2166          */
2167         if (nfc->fs.location > RXCHK_BRCM_TAG_CID_MASK)
2168                 return -E2BIG;
2169
2170         /* We cannot support flows that are not destined for a wake-up */
2171         if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE)
2172                 return -EOPNOTSUPP;
2173
2174         /* All filters are already in use, we cannot match more rules */
2175         if (bitmap_weight(priv->filters, RXCHK_BRCM_TAG_MAX) ==
2176             RXCHK_BRCM_TAG_MAX)
2177                 return -ENOSPC;
2178
2179         index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX);
2180         if (index > RXCHK_BRCM_TAG_MAX)
2181                 return -ENOSPC;
2182
2183         /* Location is the classification ID, and index is the position
2184          * within one of our 8 possible filters to be programmed
2185          */
2186         reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2187         reg &= ~(RXCHK_BRCM_TAG_CID_MASK << RXCHK_BRCM_TAG_CID_SHIFT);
2188         reg |= nfc->fs.location << RXCHK_BRCM_TAG_CID_SHIFT;
2189         rxchk_writel(priv, reg, RXCHK_BRCM_TAG(index));
2190         rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
2191
2192         set_bit(index, priv->filters);
2193
2194         return 0;
2195 }
2196
2197 static int bcm_sysport_rule_del(struct bcm_sysport_priv *priv,
2198                                 u64 location)
2199 {
2200         int index;
2201
2202         /* This is not a rule that we know about */
2203         index = bcm_sysport_rule_find(priv, location);
2204         if (index < 0)
2205                 return -EOPNOTSUPP;
2206
2207         /* No need to disable this filter if it was enabled, this will
2208          * be taken care of during suspend time by bcm_sysport_suspend_to_wol
2209          */
2210         clear_bit(index, priv->filters);
2211
2212         return 0;
2213 }
2214
2215 static int bcm_sysport_get_rxnfc(struct net_device *dev,
2216                                  struct ethtool_rxnfc *nfc, u32 *rule_locs)
2217 {
2218         struct bcm_sysport_priv *priv = netdev_priv(dev);
2219         int ret = -EOPNOTSUPP;
2220
2221         switch (nfc->cmd) {
2222         case ETHTOOL_GRXCLSRULE:
2223                 ret = bcm_sysport_rule_get(priv, nfc);
2224                 break;
2225         default:
2226                 break;
2227         }
2228
2229         return ret;
2230 }
2231
2232 static int bcm_sysport_set_rxnfc(struct net_device *dev,
2233                                  struct ethtool_rxnfc *nfc)
2234 {
2235         struct bcm_sysport_priv *priv = netdev_priv(dev);
2236         int ret = -EOPNOTSUPP;
2237
2238         switch (nfc->cmd) {
2239         case ETHTOOL_SRXCLSRLINS:
2240                 ret = bcm_sysport_rule_set(priv, nfc);
2241                 break;
2242         case ETHTOOL_SRXCLSRLDEL:
2243                 ret = bcm_sysport_rule_del(priv, nfc->fs.location);
2244                 break;
2245         default:
2246                 break;
2247         }
2248
2249         return ret;
2250 }
2251
2252 static const struct ethtool_ops bcm_sysport_ethtool_ops = {
2253         .get_drvinfo            = bcm_sysport_get_drvinfo,
2254         .get_msglevel           = bcm_sysport_get_msglvl,
2255         .set_msglevel           = bcm_sysport_set_msglvl,
2256         .get_link               = ethtool_op_get_link,
2257         .get_strings            = bcm_sysport_get_strings,
2258         .get_ethtool_stats      = bcm_sysport_get_stats,
2259         .get_sset_count         = bcm_sysport_get_sset_count,
2260         .get_wol                = bcm_sysport_get_wol,
2261         .set_wol                = bcm_sysport_set_wol,
2262         .get_coalesce           = bcm_sysport_get_coalesce,
2263         .set_coalesce           = bcm_sysport_set_coalesce,
2264         .get_link_ksettings     = phy_ethtool_get_link_ksettings,
2265         .set_link_ksettings     = phy_ethtool_set_link_ksettings,
2266         .get_rxnfc              = bcm_sysport_get_rxnfc,
2267         .set_rxnfc              = bcm_sysport_set_rxnfc,
2268 };
2269
2270 static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb,
2271                                     struct net_device *sb_dev,
2272                                     select_queue_fallback_t fallback)
2273 {
2274         struct bcm_sysport_priv *priv = netdev_priv(dev);
2275         u16 queue = skb_get_queue_mapping(skb);
2276         struct bcm_sysport_tx_ring *tx_ring;
2277         unsigned int q, port;
2278
2279         if (!netdev_uses_dsa(dev))
2280                 return fallback(dev, skb, NULL);
2281
2282         /* DSA tagging layer will have configured the correct queue */
2283         q = BRCM_TAG_GET_QUEUE(queue);
2284         port = BRCM_TAG_GET_PORT(queue);
2285         tx_ring = priv->ring_map[q + port * priv->per_port_num_tx_queues];
2286
2287         if (unlikely(!tx_ring))
2288                 return fallback(dev, skb, NULL);
2289
2290         return tx_ring->index;
2291 }
2292
2293 static const struct net_device_ops bcm_sysport_netdev_ops = {
2294         .ndo_start_xmit         = bcm_sysport_xmit,
2295         .ndo_tx_timeout         = bcm_sysport_tx_timeout,
2296         .ndo_open               = bcm_sysport_open,
2297         .ndo_stop               = bcm_sysport_stop,
2298         .ndo_set_features       = bcm_sysport_set_features,
2299         .ndo_set_rx_mode        = bcm_sysport_set_rx_mode,
2300         .ndo_set_mac_address    = bcm_sysport_change_mac,
2301 #ifdef CONFIG_NET_POLL_CONTROLLER
2302         .ndo_poll_controller    = bcm_sysport_poll_controller,
2303 #endif
2304         .ndo_get_stats64        = bcm_sysport_get_stats64,
2305         .ndo_select_queue       = bcm_sysport_select_queue,
2306 };
2307
2308 static int bcm_sysport_map_queues(struct notifier_block *nb,
2309                                   struct dsa_notifier_register_info *info)
2310 {
2311         struct bcm_sysport_tx_ring *ring;
2312         struct bcm_sysport_priv *priv;
2313         struct net_device *slave_dev;
2314         unsigned int num_tx_queues;
2315         unsigned int q, start, port;
2316         struct net_device *dev;
2317
2318         priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2319         if (priv->netdev != info->master)
2320                 return 0;
2321
2322         dev = info->master;
2323
2324         /* We can't be setting up queue inspection for non directly attached
2325          * switches
2326          */
2327         if (info->switch_number)
2328                 return 0;
2329
2330         if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2331                 return 0;
2332
2333         port = info->port_number;
2334         slave_dev = info->info.dev;
2335
2336         /* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a
2337          * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of
2338          * per-port (slave_dev) network devices queue, we achieve just that.
2339          * This need to happen now before any slave network device is used such
2340          * it accurately reflects the number of real TX queues.
2341          */
2342         if (priv->is_lite)
2343                 netif_set_real_num_tx_queues(slave_dev,
2344                                              slave_dev->num_tx_queues / 2);
2345
2346         num_tx_queues = slave_dev->real_num_tx_queues;
2347
2348         if (priv->per_port_num_tx_queues &&
2349             priv->per_port_num_tx_queues != num_tx_queues)
2350                 netdev_warn(slave_dev, "asymmetric number of per-port queues\n");
2351
2352         priv->per_port_num_tx_queues = num_tx_queues;
2353
2354         start = find_first_zero_bit(&priv->queue_bitmap, dev->num_tx_queues);
2355         for (q = 0; q < num_tx_queues; q++) {
2356                 ring = &priv->tx_rings[q + start];
2357
2358                 /* Just remember the mapping actual programming done
2359                  * during bcm_sysport_init_tx_ring
2360                  */
2361                 ring->switch_queue = q;
2362                 ring->switch_port = port;
2363                 ring->inspect = true;
2364                 priv->ring_map[q + port * num_tx_queues] = ring;
2365
2366                 /* Set all queues as being used now */
2367                 set_bit(q + start, &priv->queue_bitmap);
2368         }
2369
2370         return 0;
2371 }
2372
2373 static int bcm_sysport_dsa_notifier(struct notifier_block *nb,
2374                                     unsigned long event, void *ptr)
2375 {
2376         struct dsa_notifier_register_info *info;
2377
2378         if (event != DSA_PORT_REGISTER)
2379                 return NOTIFY_DONE;
2380
2381         info = ptr;
2382
2383         return notifier_from_errno(bcm_sysport_map_queues(nb, info));
2384 }
2385
2386 #define REV_FMT "v%2x.%02x"
2387
2388 static const struct bcm_sysport_hw_params bcm_sysport_params[] = {
2389         [SYSTEMPORT] = {
2390                 .is_lite = false,
2391                 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS,
2392         },
2393         [SYSTEMPORT_LITE] = {
2394                 .is_lite = true,
2395                 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS,
2396         },
2397 };
2398
2399 static const struct of_device_id bcm_sysport_of_match[] = {
2400         { .compatible = "brcm,systemportlite-v1.00",
2401           .data = &bcm_sysport_params[SYSTEMPORT_LITE] },
2402         { .compatible = "brcm,systemport-v1.00",
2403           .data = &bcm_sysport_params[SYSTEMPORT] },
2404         { .compatible = "brcm,systemport",
2405           .data = &bcm_sysport_params[SYSTEMPORT] },
2406         { /* sentinel */ }
2407 };
2408 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
2409
2410 static int bcm_sysport_probe(struct platform_device *pdev)
2411 {
2412         const struct bcm_sysport_hw_params *params;
2413         const struct of_device_id *of_id = NULL;
2414         struct bcm_sysport_priv *priv;
2415         struct device_node *dn;
2416         struct net_device *dev;
2417         const void *macaddr;
2418         struct resource *r;
2419         u32 txq, rxq;
2420         int ret;
2421
2422         dn = pdev->dev.of_node;
2423         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2424         of_id = of_match_node(bcm_sysport_of_match, dn);
2425         if (!of_id || !of_id->data)
2426                 return -EINVAL;
2427
2428         /* Fairly quickly we need to know the type of adapter we have */
2429         params = of_id->data;
2430
2431         /* Read the Transmit/Receive Queue properties */
2432         if (of_property_read_u32(dn, "systemport,num-txq", &txq))
2433                 txq = TDMA_NUM_RINGS;
2434         if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
2435                 rxq = 1;
2436
2437         /* Sanity check the number of transmit queues */
2438         if (!txq || txq > TDMA_NUM_RINGS)
2439                 return -EINVAL;
2440
2441         dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
2442         if (!dev)
2443                 return -ENOMEM;
2444
2445         /* Initialize private members */
2446         priv = netdev_priv(dev);
2447
2448         /* Allocate number of TX rings */
2449         priv->tx_rings = devm_kcalloc(&pdev->dev, txq,
2450                                       sizeof(struct bcm_sysport_tx_ring),
2451                                       GFP_KERNEL);
2452         if (!priv->tx_rings)
2453                 return -ENOMEM;
2454
2455         priv->is_lite = params->is_lite;
2456         priv->num_rx_desc_words = params->num_rx_desc_words;
2457
2458         priv->irq0 = platform_get_irq(pdev, 0);
2459         if (!priv->is_lite) {
2460                 priv->irq1 = platform_get_irq(pdev, 1);
2461                 priv->wol_irq = platform_get_irq(pdev, 2);
2462         } else {
2463                 priv->wol_irq = platform_get_irq(pdev, 1);
2464         }
2465         if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) {
2466                 dev_err(&pdev->dev, "invalid interrupts\n");
2467                 ret = -EINVAL;
2468                 goto err_free_netdev;
2469         }
2470
2471         priv->base = devm_ioremap_resource(&pdev->dev, r);
2472         if (IS_ERR(priv->base)) {
2473                 ret = PTR_ERR(priv->base);
2474                 goto err_free_netdev;
2475         }
2476
2477         priv->netdev = dev;
2478         priv->pdev = pdev;
2479
2480         priv->phy_interface = of_get_phy_mode(dn);
2481         /* Default to GMII interface mode */
2482         if (priv->phy_interface < 0)
2483                 priv->phy_interface = PHY_INTERFACE_MODE_GMII;
2484
2485         /* In the case of a fixed PHY, the DT node associated
2486          * to the PHY is the Ethernet MAC DT node.
2487          */
2488         if (of_phy_is_fixed_link(dn)) {
2489                 ret = of_phy_register_fixed_link(dn);
2490                 if (ret) {
2491                         dev_err(&pdev->dev, "failed to register fixed PHY\n");
2492                         goto err_free_netdev;
2493                 }
2494
2495                 priv->phy_dn = dn;
2496         }
2497
2498         /* Initialize netdevice members */
2499         macaddr = of_get_mac_address(dn);
2500         if (!macaddr || !is_valid_ether_addr(macaddr)) {
2501                 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
2502                 eth_hw_addr_random(dev);
2503         } else {
2504                 ether_addr_copy(dev->dev_addr, macaddr);
2505         }
2506
2507         SET_NETDEV_DEV(dev, &pdev->dev);
2508         dev_set_drvdata(&pdev->dev, dev);
2509         dev->ethtool_ops = &bcm_sysport_ethtool_ops;
2510         dev->netdev_ops = &bcm_sysport_netdev_ops;
2511         netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64);
2512
2513         dev->features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
2514                          NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2515         dev->hw_features |= dev->features;
2516         dev->vlan_features |= dev->features;
2517
2518         /* Request the WOL interrupt and advertise suspend if available */
2519         priv->wol_irq_disabled = 1;
2520         ret = devm_request_irq(&pdev->dev, priv->wol_irq,
2521                                bcm_sysport_wol_isr, 0, dev->name, priv);
2522         if (!ret)
2523                 device_set_wakeup_capable(&pdev->dev, 1);
2524
2525         /* Set the needed headroom once and for all */
2526         BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
2527         dev->needed_headroom += sizeof(struct bcm_tsb);
2528
2529         /* libphy will adjust the link state accordingly */
2530         netif_carrier_off(dev);
2531
2532         priv->rx_max_coalesced_frames = 1;
2533         u64_stats_init(&priv->syncp);
2534
2535         priv->dsa_notifier.notifier_call = bcm_sysport_dsa_notifier;
2536
2537         ret = register_dsa_notifier(&priv->dsa_notifier);
2538         if (ret) {
2539                 dev_err(&pdev->dev, "failed to register DSA notifier\n");
2540                 goto err_deregister_fixed_link;
2541         }
2542
2543         ret = register_netdev(dev);
2544         if (ret) {
2545                 dev_err(&pdev->dev, "failed to register net_device\n");
2546                 goto err_deregister_notifier;
2547         }
2548
2549         priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
2550         dev_info(&pdev->dev,
2551                  "Broadcom SYSTEMPORT%s" REV_FMT
2552                  " at 0x%p (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
2553                  priv->is_lite ? " Lite" : "",
2554                  (priv->rev >> 8) & 0xff, priv->rev & 0xff,
2555                  priv->base, priv->irq0, priv->irq1, txq, rxq);
2556
2557         return 0;
2558
2559 err_deregister_notifier:
2560         unregister_dsa_notifier(&priv->dsa_notifier);
2561 err_deregister_fixed_link:
2562         if (of_phy_is_fixed_link(dn))
2563                 of_phy_deregister_fixed_link(dn);
2564 err_free_netdev:
2565         free_netdev(dev);
2566         return ret;
2567 }
2568
2569 static int bcm_sysport_remove(struct platform_device *pdev)
2570 {
2571         struct net_device *dev = dev_get_drvdata(&pdev->dev);
2572         struct bcm_sysport_priv *priv = netdev_priv(dev);
2573         struct device_node *dn = pdev->dev.of_node;
2574
2575         /* Not much to do, ndo_close has been called
2576          * and we use managed allocations
2577          */
2578         unregister_dsa_notifier(&priv->dsa_notifier);
2579         unregister_netdev(dev);
2580         if (of_phy_is_fixed_link(dn))
2581                 of_phy_deregister_fixed_link(dn);
2582         free_netdev(dev);
2583         dev_set_drvdata(&pdev->dev, NULL);
2584
2585         return 0;
2586 }
2587
2588 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
2589 {
2590         struct net_device *ndev = priv->netdev;
2591         unsigned int timeout = 1000;
2592         unsigned int index, i = 0;
2593         u32 reg;
2594
2595         /* Password has already been programmed */
2596         reg = umac_readl(priv, UMAC_MPD_CTRL);
2597         if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE))
2598                 reg |= MPD_EN;
2599         reg &= ~PSW_EN;
2600         if (priv->wolopts & WAKE_MAGICSECURE)
2601                 reg |= PSW_EN;
2602         umac_writel(priv, reg, UMAC_MPD_CTRL);
2603
2604         if (priv->wolopts & WAKE_FILTER) {
2605                 /* Turn on ACPI matching to steal packets from RBUF */
2606                 reg = rbuf_readl(priv, RBUF_CONTROL);
2607                 if (priv->is_lite)
2608                         reg |= RBUF_ACPI_EN_LITE;
2609                 else
2610                         reg |= RBUF_ACPI_EN;
2611                 rbuf_writel(priv, reg, RBUF_CONTROL);
2612
2613                 /* Enable RXCHK, active filters and Broadcom tag matching */
2614                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2615                 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
2616                          RXCHK_BRCM_TAG_MATCH_SHIFT);
2617                 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2618                         reg |= BIT(RXCHK_BRCM_TAG_MATCH_SHIFT + i);
2619                         i++;
2620                 }
2621                 reg |= RXCHK_EN | RXCHK_BRCM_TAG_EN;
2622                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2623         }
2624
2625         /* Make sure RBUF entered WoL mode as result */
2626         do {
2627                 reg = rbuf_readl(priv, RBUF_STATUS);
2628                 if (reg & RBUF_WOL_MODE)
2629                         break;
2630
2631                 udelay(10);
2632         } while (timeout-- > 0);
2633
2634         /* Do not leave the UniMAC RBUF matching only MPD packets */
2635         if (!timeout) {
2636                 mpd_enable_set(priv, false);
2637                 netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
2638                 return -ETIMEDOUT;
2639         }
2640
2641         /* UniMAC receive needs to be turned on */
2642         umac_enable_set(priv, CMD_RX_EN, 1);
2643
2644         netif_dbg(priv, wol, ndev, "entered WOL mode\n");
2645
2646         return 0;
2647 }
2648
2649 static int __maybe_unused bcm_sysport_suspend(struct device *d)
2650 {
2651         struct net_device *dev = dev_get_drvdata(d);
2652         struct bcm_sysport_priv *priv = netdev_priv(dev);
2653         unsigned int i;
2654         int ret = 0;
2655         u32 reg;
2656
2657         if (!netif_running(dev))
2658                 return 0;
2659
2660         netif_device_detach(dev);
2661
2662         bcm_sysport_netif_stop(dev);
2663
2664         phy_suspend(dev->phydev);
2665
2666         /* Disable UniMAC RX */
2667         umac_enable_set(priv, CMD_RX_EN, 0);
2668
2669         ret = rdma_enable_set(priv, 0);
2670         if (ret) {
2671                 netdev_err(dev, "RDMA timeout!\n");
2672                 return ret;
2673         }
2674
2675         /* Disable RXCHK if enabled */
2676         if (priv->rx_chk_en) {
2677                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2678                 reg &= ~RXCHK_EN;
2679                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2680         }
2681
2682         /* Flush RX pipe */
2683         if (!priv->wolopts)
2684                 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
2685
2686         ret = tdma_enable_set(priv, 0);
2687         if (ret) {
2688                 netdev_err(dev, "TDMA timeout!\n");
2689                 return ret;
2690         }
2691
2692         /* Wait for a packet boundary */
2693         usleep_range(2000, 3000);
2694
2695         umac_enable_set(priv, CMD_TX_EN, 0);
2696
2697         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
2698
2699         /* Free RX/TX rings SW structures */
2700         for (i = 0; i < dev->num_tx_queues; i++)
2701                 bcm_sysport_fini_tx_ring(priv, i);
2702         bcm_sysport_fini_rx_ring(priv);
2703
2704         /* Get prepared for Wake-on-LAN */
2705         if (device_may_wakeup(d) && priv->wolopts)
2706                 ret = bcm_sysport_suspend_to_wol(priv);
2707
2708         return ret;
2709 }
2710
2711 static int __maybe_unused bcm_sysport_resume(struct device *d)
2712 {
2713         struct net_device *dev = dev_get_drvdata(d);
2714         struct bcm_sysport_priv *priv = netdev_priv(dev);
2715         unsigned int i;
2716         int ret;
2717
2718         if (!netif_running(dev))
2719                 return 0;
2720
2721         umac_reset(priv);
2722
2723         /* We may have been suspended and never received a WOL event that
2724          * would turn off MPD detection, take care of that now
2725          */
2726         bcm_sysport_resume_from_wol(priv);
2727
2728         /* Initialize both hardware and software ring */
2729         for (i = 0; i < dev->num_tx_queues; i++) {
2730                 ret = bcm_sysport_init_tx_ring(priv, i);
2731                 if (ret) {
2732                         netdev_err(dev, "failed to initialize TX ring %d\n",
2733                                    i);
2734                         goto out_free_tx_rings;
2735                 }
2736         }
2737
2738         /* Initialize linked-list */
2739         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2740
2741         /* Initialize RX ring */
2742         ret = bcm_sysport_init_rx_ring(priv);
2743         if (ret) {
2744                 netdev_err(dev, "failed to initialize RX ring\n");
2745                 goto out_free_rx_ring;
2746         }
2747
2748         /* RX pipe enable */
2749         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2750
2751         ret = rdma_enable_set(priv, 1);
2752         if (ret) {
2753                 netdev_err(dev, "failed to enable RDMA\n");
2754                 goto out_free_rx_ring;
2755         }
2756
2757         /* Restore enabled features */
2758         bcm_sysport_set_features(dev, dev->features);
2759
2760         rbuf_init(priv);
2761
2762         /* Set maximum frame length */
2763         if (!priv->is_lite)
2764                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2765         else
2766                 gib_set_pad_extension(priv);
2767
2768         /* Set MAC address */
2769         umac_set_hw_addr(priv, dev->dev_addr);
2770
2771         umac_enable_set(priv, CMD_RX_EN, 1);
2772
2773         /* TX pipe enable */
2774         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2775
2776         umac_enable_set(priv, CMD_TX_EN, 1);
2777
2778         ret = tdma_enable_set(priv, 1);
2779         if (ret) {
2780                 netdev_err(dev, "TDMA timeout!\n");
2781                 goto out_free_rx_ring;
2782         }
2783
2784         phy_resume(dev->phydev);
2785
2786         bcm_sysport_netif_start(dev);
2787
2788         netif_device_attach(dev);
2789
2790         return 0;
2791
2792 out_free_rx_ring:
2793         bcm_sysport_fini_rx_ring(priv);
2794 out_free_tx_rings:
2795         for (i = 0; i < dev->num_tx_queues; i++)
2796                 bcm_sysport_fini_tx_ring(priv, i);
2797         return ret;
2798 }
2799
2800 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2801                 bcm_sysport_suspend, bcm_sysport_resume);
2802
2803 static struct platform_driver bcm_sysport_driver = {
2804         .probe  = bcm_sysport_probe,
2805         .remove = bcm_sysport_remove,
2806         .driver =  {
2807                 .name = "brcm-systemport",
2808                 .of_match_table = bcm_sysport_of_match,
2809                 .pm = &bcm_sysport_pm_ops,
2810         },
2811 };
2812 module_platform_driver(bcm_sysport_driver);
2813
2814 MODULE_AUTHOR("Broadcom Corporation");
2815 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2816 MODULE_ALIAS("platform:brcm-systemport");
2817 MODULE_LICENSE("GPL");