drivers/net/ethernet/broadcom/bcmsysport.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Broadcom BCM7xxx System Port Ethernet MAC driver
   4  *
   5  * Copyright (C) 2014 Broadcom Corporation
   6  */
   7
   8 #define pr_fmt(fmt)     KBUILD_MODNAME ": " fmt
   9
  10 #include <linux/init.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/etherdevice.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/of.h>
  18 #include <linux/of_net.h>
  19 #include <linux/of_mdio.h>
  20 #include <linux/phy.h>
  21 #include <linux/phy_fixed.h>
  22 #include <net/dsa.h>
  23 #include <net/ip.h>
  24 #include <net/ipv6.h>
  25
  26 #include "bcmsysport.h"
  27
  28 /* I/O accessors register helpers */
  29 #define BCM_SYSPORT_IO_MACRO(name, offset) \
  30 static inline u32 name##_readl(struct bcm_sysport_priv *priv, u32 off)  \
  31 {                                                                       \
  32         u32 reg = readl_relaxed(priv->base + offset + off);             \
  33         return reg;                                                     \
  34 }                                                                       \
  35 static inline void name##_writel(struct bcm_sysport_priv *priv,         \
  36                                   u32 val, u32 off)                     \
  37 {                                                                       \
  38         writel_relaxed(val, priv->base + offset + off);                 \
  39 }                                                                       \
  40
  41 BCM_SYSPORT_IO_MACRO(intrl2_0, SYS_PORT_INTRL2_0_OFFSET);
  42 BCM_SYSPORT_IO_MACRO(intrl2_1, SYS_PORT_INTRL2_1_OFFSET);
  43 BCM_SYSPORT_IO_MACRO(umac, SYS_PORT_UMAC_OFFSET);
  44 BCM_SYSPORT_IO_MACRO(gib, SYS_PORT_GIB_OFFSET);
  45 BCM_SYSPORT_IO_MACRO(tdma, SYS_PORT_TDMA_OFFSET);
  46 BCM_SYSPORT_IO_MACRO(rxchk, SYS_PORT_RXCHK_OFFSET);
  47 BCM_SYSPORT_IO_MACRO(txchk, SYS_PORT_TXCHK_OFFSET);
  48 BCM_SYSPORT_IO_MACRO(rbuf, SYS_PORT_RBUF_OFFSET);
  49 BCM_SYSPORT_IO_MACRO(tbuf, SYS_PORT_TBUF_OFFSET);
  50 BCM_SYSPORT_IO_MACRO(topctrl, SYS_PORT_TOPCTRL_OFFSET);
  51
  52 /* On SYSTEMPORT Lite, any register after RDMA_STATUS has the exact
  53  * same layout, except it has been moved by 4 bytes up, *sigh*
  54  */
  55 static inline u32 rdma_readl(struct bcm_sysport_priv *priv, u32 off)
  56 {
  57         if (priv->is_lite && off >= RDMA_STATUS)
  58                 off += 4;
  59         return readl_relaxed(priv->base + SYS_PORT_RDMA_OFFSET + off);
  60 }
  61
  62 static inline void rdma_writel(struct bcm_sysport_priv *priv, u32 val, u32 off)
  63 {
  64         if (priv->is_lite && off >= RDMA_STATUS)
  65                 off += 4;
  66         writel_relaxed(val, priv->base + SYS_PORT_RDMA_OFFSET + off);
  67 }
  68
  69 static inline u32 tdma_control_bit(struct bcm_sysport_priv *priv, u32 bit)
  70 {
  71         if (!priv->is_lite) {
  72                 return BIT(bit);
  73         } else {
  74                 if (bit >= ACB_ALGO)
  75                         return BIT(bit + 1);
  76                 else
  77                         return BIT(bit);
  78         }
  79 }
  80
  81 /* L2-interrupt masking/unmasking helpers, does automatic saving of the applied
  82  * mask in a software copy to avoid CPU_MASK_STATUS reads in hot-paths.
  83   */
  84 #define BCM_SYSPORT_INTR_L2(which)      \
  85 static inline void intrl2_##which##_mask_clear(struct bcm_sysport_priv *priv, \
  86                                                 u32 mask)               \
  87 {                                                                       \
  88         priv->irq##which##_mask &= ~(mask);                             \
  89         intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR);     \
  90 }                                                                       \
  91 static inline void intrl2_##which##_mask_set(struct bcm_sysport_priv *priv, \
  92                                                 u32 mask)               \
  93 {                                                                       \
  94         intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET);      \
  95         priv->irq##which##_mask |= (mask);                              \
  96 }                                                                       \
  97
  98 BCM_SYSPORT_INTR_L2(0)
  99 BCM_SYSPORT_INTR_L2(1)
 100
 101 /* Register accesses to GISB/RBUS registers are expensive (few hundred
 102  * nanoseconds), so keep the check for 64-bits explicit here to save
 103  * one register write per-packet on 32-bits platforms.
 104  */
 105 static inline void dma_desc_set_addr(struct bcm_sysport_priv *priv,
 106                                      void __iomem *d,
 107                                      dma_addr_t addr)
 108 {
 109 #ifdef CONFIG_PHYS_ADDR_T_64BIT
 110         writel_relaxed(upper_32_bits(addr) & DESC_ADDR_HI_MASK,
 111                      d + DESC_ADDR_HI_STATUS_LEN);
 112 #endif
 113         writel_relaxed(lower_32_bits(addr), d + DESC_ADDR_LO);
 114 }
 115
 116 /* Ethtool operations */
 117 static void bcm_sysport_set_rx_csum(struct net_device *dev,
 118                                     netdev_features_t wanted)
 119 {
 120         struct bcm_sysport_priv *priv = netdev_priv(dev);
 121         u32 reg;
 122
 123         priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM);
 124         reg = rxchk_readl(priv, RXCHK_CONTROL);
 125         /* Clear L2 header checks, which would prevent BPDUs
 126          * from being received.
 127          */
 128         reg &= ~RXCHK_L2_HDR_DIS;
 129         if (priv->rx_chk_en)
 130                 reg |= RXCHK_EN;
 131         else
 132                 reg &= ~RXCHK_EN;
 133
 134         /* If UniMAC forwards CRC, we need to skip over it to get
 135          * a valid CHK bit to be set in the per-packet status word
 136          */
 137         if (priv->rx_chk_en && priv->crc_fwd)
 138                 reg |= RXCHK_SKIP_FCS;
 139         else
 140                 reg &= ~RXCHK_SKIP_FCS;
 141
 142         /* If Broadcom tags are enabled (e.g: using a switch), make
 143          * sure we tell the RXCHK hardware to expect a 4-bytes Broadcom
 144          * tag after the Ethernet MAC Source Address.
 145          */
 146         if (netdev_uses_dsa(dev))
 147                 reg |= RXCHK_BRCM_TAG_EN;
 148         else
 149                 reg &= ~RXCHK_BRCM_TAG_EN;
 150
 151         rxchk_writel(priv, reg, RXCHK_CONTROL);
 152 }
 153
 154 static void bcm_sysport_set_tx_csum(struct net_device *dev,
 155                                     netdev_features_t wanted)
 156 {
 157         struct bcm_sysport_priv *priv = netdev_priv(dev);
 158         u32 reg;
 159
 160         /* Hardware transmit checksum requires us to enable the Transmit status
 161          * block prepended to the packet contents
 162          */
 163         priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM));
 164         reg = tdma_readl(priv, TDMA_CONTROL);
 165         if (priv->tsb_en)
 166                 reg |= tdma_control_bit(priv, TSB_EN);
 167         else
 168                 reg &= ~tdma_control_bit(priv, TSB_EN);
 169         tdma_writel(priv, reg, TDMA_CONTROL);
 170 }
 171
 172 static int bcm_sysport_set_features(struct net_device *dev,
 173                                     netdev_features_t features)
 174 {
 175         struct bcm_sysport_priv *priv = netdev_priv(dev);
 176
 177         /* Read CRC forward */
 178         if (!priv->is_lite)
 179                 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
 180         else
 181                 priv->crc_fwd = !((gib_readl(priv, GIB_CONTROL) &
 182                                   GIB_FCS_STRIP) >> GIB_FCS_STRIP_SHIFT);
 183
 184         bcm_sysport_set_rx_csum(dev, features);
 185         bcm_sysport_set_tx_csum(dev, features);
 186
 187         return 0;
 188 }
 189
 190 /* Hardware counters must be kept in sync because the order/offset
 191  * is important here (order in structure declaration = order in hardware)
 192  */
 193 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = {
 194         /* general stats */
 195         STAT_NETDEV64(rx_packets),
 196         STAT_NETDEV64(tx_packets),
 197         STAT_NETDEV64(rx_bytes),
 198         STAT_NETDEV64(tx_bytes),
 199         STAT_NETDEV(rx_errors),
 200         STAT_NETDEV(tx_errors),
 201         STAT_NETDEV(rx_dropped),
 202         STAT_NETDEV(tx_dropped),
 203         STAT_NETDEV(multicast),
 204         /* UniMAC RSV counters */
 205         STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
 206         STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
 207         STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
 208         STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
 209         STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
 210         STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
 211         STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
 212         STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
 213         STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
 214         STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
 215         STAT_MIB_RX("rx_pkts", mib.rx.pkt),
 216         STAT_MIB_RX("rx_bytes", mib.rx.bytes),
 217         STAT_MIB_RX("rx_multicast", mib.rx.mca),
 218         STAT_MIB_RX("rx_broadcast", mib.rx.bca),
 219         STAT_MIB_RX("rx_fcs", mib.rx.fcs),
 220         STAT_MIB_RX("rx_control", mib.rx.cf),
 221         STAT_MIB_RX("rx_pause", mib.rx.pf),
 222         STAT_MIB_RX("rx_unknown", mib.rx.uo),
 223         STAT_MIB_RX("rx_align", mib.rx.aln),
 224         STAT_MIB_RX("rx_outrange", mib.rx.flr),
 225         STAT_MIB_RX("rx_code", mib.rx.cde),
 226         STAT_MIB_RX("rx_carrier", mib.rx.fcr),
 227         STAT_MIB_RX("rx_oversize", mib.rx.ovr),
 228         STAT_MIB_RX("rx_jabber", mib.rx.jbr),
 229         STAT_MIB_RX("rx_mtu_err", mib.rx.mtue),
 230         STAT_MIB_RX("rx_good_pkts", mib.rx.pok),
 231         STAT_MIB_RX("rx_unicast", mib.rx.uc),
 232         STAT_MIB_RX("rx_ppp", mib.rx.ppp),
 233         STAT_MIB_RX("rx_crc", mib.rx.rcrc),
 234         /* UniMAC TSV counters */
 235         STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
 236         STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
 237         STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
 238         STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
 239         STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
 240         STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
 241         STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
 242         STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
 243         STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
 244         STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
 245         STAT_MIB_TX("tx_pkts", mib.tx.pkts),
 246         STAT_MIB_TX("tx_multicast", mib.tx.mca),
 247         STAT_MIB_TX("tx_broadcast", mib.tx.bca),
 248         STAT_MIB_TX("tx_pause", mib.tx.pf),
 249         STAT_MIB_TX("tx_control", mib.tx.cf),
 250         STAT_MIB_TX("tx_fcs_err", mib.tx.fcs),
 251         STAT_MIB_TX("tx_oversize", mib.tx.ovr),
 252         STAT_MIB_TX("tx_defer", mib.tx.drf),
 253         STAT_MIB_TX("tx_excess_defer", mib.tx.edf),
 254         STAT_MIB_TX("tx_single_col", mib.tx.scl),
 255         STAT_MIB_TX("tx_multi_col", mib.tx.mcl),
 256         STAT_MIB_TX("tx_late_col", mib.tx.lcl),
 257         STAT_MIB_TX("tx_excess_col", mib.tx.ecl),
 258         STAT_MIB_TX("tx_frags", mib.tx.frg),
 259         STAT_MIB_TX("tx_total_col", mib.tx.ncl),
 260         STAT_MIB_TX("tx_jabber", mib.tx.jbr),
 261         STAT_MIB_TX("tx_bytes", mib.tx.bytes),
 262         STAT_MIB_TX("tx_good_pkts", mib.tx.pok),
 263         STAT_MIB_TX("tx_unicast", mib.tx.uc),
 264         /* UniMAC RUNT counters */
 265         STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
 266         STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
 267         STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
 268         STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
 269         /* RXCHK misc statistics */
 270         STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR),
 271         STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc,
 272                    RXCHK_OTHER_DISC_CNTR),
 273         /* RBUF misc statistics */
 274         STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR),
 275         STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR),
 276         STAT_MIB_SOFT("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
 277         STAT_MIB_SOFT("rx_dma_failed", mib.rx_dma_failed),
 278         STAT_MIB_SOFT("tx_dma_failed", mib.tx_dma_failed),
 279         STAT_MIB_SOFT("tx_realloc_tsb", mib.tx_realloc_tsb),
 280         STAT_MIB_SOFT("tx_realloc_tsb_failed", mib.tx_realloc_tsb_failed),
 281         /* Per TX-queue statistics are dynamically appended */
 282 };
 283
 284 #define BCM_SYSPORT_STATS_LEN   ARRAY_SIZE(bcm_sysport_gstrings_stats)
 285
 286 static void bcm_sysport_get_drvinfo(struct net_device *dev,
 287                                     struct ethtool_drvinfo *info)
 288 {
 289         strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
 290         strlcpy(info->version, "0.1", sizeof(info->version));
 291         strlcpy(info->bus_info, "platform", sizeof(info->bus_info));
 292 }
 293
 294 static u32 bcm_sysport_get_msglvl(struct net_device *dev)
 295 {
 296         struct bcm_sysport_priv *priv = netdev_priv(dev);
 297
 298         return priv->msg_enable;
 299 }
 300
 301 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
 302 {
 303         struct bcm_sysport_priv *priv = netdev_priv(dev);
 304
 305         priv->msg_enable = enable;
 306 }
 307
 308 static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type)
 309 {
 310         switch (type) {
 311         case BCM_SYSPORT_STAT_NETDEV:
 312         case BCM_SYSPORT_STAT_NETDEV64:
 313         case BCM_SYSPORT_STAT_RXCHK:
 314         case BCM_SYSPORT_STAT_RBUF:
 315         case BCM_SYSPORT_STAT_SOFT:
 316                 return true;
 317         default:
 318                 return false;
 319         }
 320 }
 321
 322 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set)
 323 {
 324         struct bcm_sysport_priv *priv = netdev_priv(dev);
 325         const struct bcm_sysport_stats *s;
 326         unsigned int i, j;
 327
 328         switch (string_set) {
 329         case ETH_SS_STATS:
 330                 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 331                         s = &bcm_sysport_gstrings_stats[i];
 332                         if (priv->is_lite &&
 333                             !bcm_sysport_lite_stat_valid(s->type))
 334                                 continue;
 335                         j++;
 336                 }
 337                 /* Include per-queue statistics */
 338                 return j + dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
 339         default:
 340                 return -EOPNOTSUPP;
 341         }
 342 }
 343
 344 static void bcm_sysport_get_strings(struct net_device *dev,
 345                                     u32 stringset, u8 *data)
 346 {
 347         struct bcm_sysport_priv *priv = netdev_priv(dev);
 348         const struct bcm_sysport_stats *s;
 349         char buf[128];
 350         int i, j;
 351
 352         switch (stringset) {
 353         case ETH_SS_STATS:
 354                 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 355                         s = &bcm_sysport_gstrings_stats[i];
 356                         if (priv->is_lite &&
 357                             !bcm_sysport_lite_stat_valid(s->type))
 358                                 continue;
 359
 360                         memcpy(data + j * ETH_GSTRING_LEN, s->stat_string,
 361                                ETH_GSTRING_LEN);
 362                         j++;
 363                 }
 364
 365                 for (i = 0; i < dev->num_tx_queues; i++) {
 366                         snprintf(buf, sizeof(buf), "txq%d_packets", i);
 367                         memcpy(data + j * ETH_GSTRING_LEN, buf,
 368                                ETH_GSTRING_LEN);
 369                         j++;
 370
 371                         snprintf(buf, sizeof(buf), "txq%d_bytes", i);
 372                         memcpy(data + j * ETH_GSTRING_LEN, buf,
 373                                ETH_GSTRING_LEN);
 374                         j++;
 375                 }
 376                 break;
 377         default:
 378                 break;
 379         }
 380 }
 381
 382 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
 383 {
 384         int i, j = 0;
 385
 386         for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 387                 const struct bcm_sysport_stats *s;
 388                 u8 offset = 0;
 389                 u32 val = 0;
 390                 char *p;
 391
 392                 s = &bcm_sysport_gstrings_stats[i];
 393                 switch (s->type) {
 394                 case BCM_SYSPORT_STAT_NETDEV:
 395                 case BCM_SYSPORT_STAT_NETDEV64:
 396                 case BCM_SYSPORT_STAT_SOFT:
 397                         continue;
 398                 case BCM_SYSPORT_STAT_MIB_RX:
 399                 case BCM_SYSPORT_STAT_MIB_TX:
 400                 case BCM_SYSPORT_STAT_RUNT:
 401                         if (priv->is_lite)
 402                                 continue;
 403
 404                         if (s->type != BCM_SYSPORT_STAT_MIB_RX)
 405                                 offset = UMAC_MIB_STAT_OFFSET;
 406                         val = umac_readl(priv, UMAC_MIB_START + j + offset);
 407                         break;
 408                 case BCM_SYSPORT_STAT_RXCHK:
 409                         val = rxchk_readl(priv, s->reg_offset);
 410                         if (val == ~0)
 411                                 rxchk_writel(priv, 0, s->reg_offset);
 412                         break;
 413                 case BCM_SYSPORT_STAT_RBUF:
 414                         val = rbuf_readl(priv, s->reg_offset);
 415                         if (val == ~0)
 416                                 rbuf_writel(priv, 0, s->reg_offset);
 417                         break;
 418                 }
 419
 420                 j += s->stat_sizeof;
 421                 p = (char *)priv + s->stat_offset;
 422                 *(u32 *)p = val;
 423         }
 424
 425         netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
 426 }
 427
 428 static void bcm_sysport_update_tx_stats(struct bcm_sysport_priv *priv,
 429                                         u64 *tx_bytes, u64 *tx_packets)
 430 {
 431         struct bcm_sysport_tx_ring *ring;
 432         u64 bytes = 0, packets = 0;
 433         unsigned int start;
 434         unsigned int q;
 435
 436         for (q = 0; q < priv->netdev->num_tx_queues; q++) {
 437                 ring = &priv->tx_rings[q];
 438                 do {
 439                         start = u64_stats_fetch_begin_irq(&priv->syncp);
 440                         bytes = ring->bytes;
 441                         packets = ring->packets;
 442                 } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
 443
 444                 *tx_bytes += bytes;
 445                 *tx_packets += packets;
 446         }
 447 }
 448
 449 static void bcm_sysport_get_stats(struct net_device *dev,
 450                                   struct ethtool_stats *stats, u64 *data)
 451 {
 452         struct bcm_sysport_priv *priv = netdev_priv(dev);
 453         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
 454         struct u64_stats_sync *syncp = &priv->syncp;
 455         struct bcm_sysport_tx_ring *ring;
 456         u64 tx_bytes = 0, tx_packets = 0;
 457         unsigned int start;
 458         int i, j;
 459
 460         if (netif_running(dev)) {
 461                 bcm_sysport_update_mib_counters(priv);
 462                 bcm_sysport_update_tx_stats(priv, &tx_bytes, &tx_packets);
 463                 stats64->tx_bytes = tx_bytes;
 464                 stats64->tx_packets = tx_packets;
 465         }
 466
 467         for (i =  0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 468                 const struct bcm_sysport_stats *s;
 469                 char *p;
 470
 471                 s = &bcm_sysport_gstrings_stats[i];
 472                 if (s->type == BCM_SYSPORT_STAT_NETDEV)
 473                         p = (char *)&dev->stats;
 474                 else if (s->type == BCM_SYSPORT_STAT_NETDEV64)
 475                         p = (char *)stats64;
 476                 else
 477                         p = (char *)priv;
 478
 479                 if (priv->is_lite && !bcm_sysport_lite_stat_valid(s->type))
 480                         continue;
 481                 p += s->stat_offset;
 482
 483                 if (s->stat_sizeof == sizeof(u64) &&
 484                     s->type == BCM_SYSPORT_STAT_NETDEV64) {
 485                         do {
 486                                 start = u64_stats_fetch_begin_irq(syncp);
 487                                 data[i] = *(u64 *)p;
 488                         } while (u64_stats_fetch_retry_irq(syncp, start));
 489                 } else
 490                         data[i] = *(u32 *)p;
 491                 j++;
 492         }
 493
 494         /* For SYSTEMPORT Lite since we have holes in our statistics, j would
 495          * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it
 496          * needs to point to how many total statistics we have minus the
 497          * number of per TX queue statistics
 498          */
 499         j = bcm_sysport_get_sset_count(dev, ETH_SS_STATS) -
 500             dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
 501
 502         for (i = 0; i < dev->num_tx_queues; i++) {
 503                 ring = &priv->tx_rings[i];
 504                 data[j] = ring->packets;
 505                 j++;
 506                 data[j] = ring->bytes;
 507                 j++;
 508         }
 509 }
 510
 511 static void bcm_sysport_get_wol(struct net_device *dev,
 512                                 struct ethtool_wolinfo *wol)
 513 {
 514         struct bcm_sysport_priv *priv = netdev_priv(dev);
 515
 516         wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
 517         wol->wolopts = priv->wolopts;
 518
 519         if (!(priv->wolopts & WAKE_MAGICSECURE))
 520                 return;
 521
 522         memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass));
 523 }
 524
 525 static int bcm_sysport_set_wol(struct net_device *dev,
 526                                struct ethtool_wolinfo *wol)
 527 {
 528         struct bcm_sysport_priv *priv = netdev_priv(dev);
 529         struct device *kdev = &priv->pdev->dev;
 530         u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
 531
 532         if (!device_can_wakeup(kdev))
 533                 return -ENOTSUPP;
 534
 535         if (wol->wolopts & ~supported)
 536                 return -EINVAL;
 537
 538         if (wol->wolopts & WAKE_MAGICSECURE)
 539                 memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass));
 540
 541         /* Flag the device and relevant IRQ as wakeup capable */
 542         if (wol->wolopts) {
 543                 device_set_wakeup_enable(kdev, 1);
 544                 if (priv->wol_irq_disabled)
 545                         enable_irq_wake(priv->wol_irq);
 546                 priv->wol_irq_disabled = 0;
 547         } else {
 548                 device_set_wakeup_enable(kdev, 0);
 549                 /* Avoid unbalanced disable_irq_wake calls */
 550                 if (!priv->wol_irq_disabled)
 551                         disable_irq_wake(priv->wol_irq);
 552                 priv->wol_irq_disabled = 1;
 553         }
 554
 555         priv->wolopts = wol->wolopts;
 556
 557         return 0;
 558 }
 559
 560 static void bcm_sysport_set_rx_coalesce(struct bcm_sysport_priv *priv,
 561                                         u32 usecs, u32 pkts)
 562 {
 563         u32 reg;
 564
 565         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 566         reg &= ~(RDMA_INTR_THRESH_MASK |
 567                  RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT);
 568         reg |= pkts;
 569         reg |= DIV_ROUND_UP(usecs * 1000, 8192) << RDMA_TIMEOUT_SHIFT;
 570         rdma_writel(priv, reg, RDMA_MBDONE_INTR);
 571 }
 572
 573 static void bcm_sysport_set_tx_coalesce(struct bcm_sysport_tx_ring *ring,
 574                                         struct ethtool_coalesce *ec)
 575 {
 576         struct bcm_sysport_priv *priv = ring->priv;
 577         u32 reg;
 578
 579         reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(ring->index));
 580         reg &= ~(RING_INTR_THRESH_MASK |
 581                  RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT);
 582         reg |= ec->tx_max_coalesced_frames;
 583         reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) <<
 584                             RING_TIMEOUT_SHIFT;
 585         tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(ring->index));
 586 }
 587
 588 static int bcm_sysport_get_coalesce(struct net_device *dev,
 589                                     struct ethtool_coalesce *ec)
 590 {
 591         struct bcm_sysport_priv *priv = netdev_priv(dev);
 592         u32 reg;
 593
 594         reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0));
 595
 596         ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000;
 597         ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK;
 598
 599         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 600
 601         ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000;
 602         ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK;
 603         ec->use_adaptive_rx_coalesce = priv->dim.use_dim;
 604
 605         return 0;
 606 }
 607
 608 static int bcm_sysport_set_coalesce(struct net_device *dev,
 609                                     struct ethtool_coalesce *ec)
 610 {
 611         struct bcm_sysport_priv *priv = netdev_priv(dev);
 612         struct dim_cq_moder moder;
 613         u32 usecs, pkts;
 614         unsigned int i;
 615
 616         /* Base system clock is 125Mhz, DMA timeout is this reference clock
 617          * divided by 1024, which yield roughly 8.192 us, our maximum value has
 618          * to fit in the RING_TIMEOUT_MASK (16 bits).
 619          */
 620         if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
 621             ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
 622             ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
 623             ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
 624                 return -EINVAL;
 625
 626         if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
 627             (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0) ||
 628             ec->use_adaptive_tx_coalesce)
 629                 return -EINVAL;
 630
 631         for (i = 0; i < dev->num_tx_queues; i++)
 632                 bcm_sysport_set_tx_coalesce(&priv->tx_rings[i], ec);
 633
 634         priv->rx_coalesce_usecs = ec->rx_coalesce_usecs;
 635         priv->rx_max_coalesced_frames = ec->rx_max_coalesced_frames;
 636         usecs = priv->rx_coalesce_usecs;
 637         pkts = priv->rx_max_coalesced_frames;
 638
 639         if (ec->use_adaptive_rx_coalesce && !priv->dim.use_dim) {
 640                 moder = net_dim_get_def_rx_moderation(priv->dim.dim.mode);
 641                 usecs = moder.usec;
 642                 pkts = moder.pkts;
 643         }
 644
 645         priv->dim.use_dim = ec->use_adaptive_rx_coalesce;
 646
 647         /* Apply desired coalescing parameters */
 648         bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
 649
 650         return 0;
 651 }
 652
 653 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
 654 {
 655         dev_consume_skb_any(cb->skb);
 656         cb->skb = NULL;
 657         dma_unmap_addr_set(cb, dma_addr, 0);
 658 }
 659
 660 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
 661                                              struct bcm_sysport_cb *cb)
 662 {
 663         struct device *kdev = &priv->pdev->dev;
 664         struct net_device *ndev = priv->netdev;
 665         struct sk_buff *skb, *rx_skb;
 666         dma_addr_t mapping;
 667
 668         /* Allocate a new SKB for a new packet */
 669         skb = netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH);
 670         if (!skb) {
 671                 priv->mib.alloc_rx_buff_failed++;
 672                 netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
 673                 return NULL;
 674         }
 675
 676         mapping = dma_map_single(kdev, skb->data,
 677                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 678         if (dma_mapping_error(kdev, mapping)) {
 679                 priv->mib.rx_dma_failed++;
 680                 dev_kfree_skb_any(skb);
 681                 netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
 682                 return NULL;
 683         }
 684
 685         /* Grab the current SKB on the ring */
 686         rx_skb = cb->skb;
 687         if (likely(rx_skb))
 688                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 689                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 690
 691         /* Put the new SKB on the ring */
 692         cb->skb = skb;
 693         dma_unmap_addr_set(cb, dma_addr, mapping);
 694         dma_desc_set_addr(priv, cb->bd_addr, mapping);
 695
 696         netif_dbg(priv, rx_status, ndev, "RX refill\n");
 697
 698         /* Return the current SKB to the caller */
 699         return rx_skb;
 700 }
 701
 702 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
 703 {
 704         struct bcm_sysport_cb *cb;
 705         struct sk_buff *skb;
 706         unsigned int i;
 707
 708         for (i = 0; i < priv->num_rx_bds; i++) {
 709                 cb = &priv->rx_cbs[i];
 710                 skb = bcm_sysport_rx_refill(priv, cb);
 711                 if (skb)
 712                         dev_kfree_skb(skb);
 713                 if (!cb->skb)
 714                         return -ENOMEM;
 715         }
 716
 717         return 0;
 718 }
 719
 720 /* Poll the hardware for up to budget packets to process */
 721 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
 722                                         unsigned int budget)
 723 {
 724         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
 725         struct net_device *ndev = priv->netdev;
 726         unsigned int processed = 0, to_process;
 727         unsigned int processed_bytes = 0;
 728         struct bcm_sysport_cb *cb;
 729         struct sk_buff *skb;
 730         unsigned int p_index;
 731         u16 len, status;
 732         struct bcm_rsb *rsb;
 733
 734         /* Clear status before servicing to reduce spurious interrupts */
 735         intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR);
 736
 737         /* Determine how much we should process since last call, SYSTEMPORT Lite
 738          * groups the producer and consumer indexes into the same 32-bit
 739          * which we access using RDMA_CONS_INDEX
 740          */
 741         if (!priv->is_lite)
 742                 p_index = rdma_readl(priv, RDMA_PROD_INDEX);
 743         else
 744                 p_index = rdma_readl(priv, RDMA_CONS_INDEX);
 745         p_index &= RDMA_PROD_INDEX_MASK;
 746
 747         to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK;
 748
 749         netif_dbg(priv, rx_status, ndev,
 750                   "p_index=%d rx_c_index=%d to_process=%d\n",
 751                   p_index, priv->rx_c_index, to_process);
 752
 753         while ((processed < to_process) && (processed < budget)) {
 754                 cb = &priv->rx_cbs[priv->rx_read_ptr];
 755                 skb = bcm_sysport_rx_refill(priv, cb);
 756
 757
 758                 /* We do not have a backing SKB, so we do not a corresponding
 759                  * DMA mapping for this incoming packet since
 760                  * bcm_sysport_rx_refill always either has both skb and mapping
 761                  * or none.
 762                  */
 763                 if (unlikely(!skb)) {
 764                         netif_err(priv, rx_err, ndev, "out of memory!\n");
 765                         ndev->stats.rx_dropped++;
 766                         ndev->stats.rx_errors++;
 767                         goto next;
 768                 }
 769
 770                 /* Extract the Receive Status Block prepended */
 771                 rsb = (struct bcm_rsb *)skb->data;
 772                 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
 773                 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
 774                           DESC_STATUS_MASK;
 775
 776                 netif_dbg(priv, rx_status, ndev,
 777                           "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
 778                           p_index, priv->rx_c_index, priv->rx_read_ptr,
 779                           len, status);
 780
 781                 if (unlikely(len > RX_BUF_LENGTH)) {
 782                         netif_err(priv, rx_status, ndev, "oversized packet\n");
 783                         ndev->stats.rx_length_errors++;
 784                         ndev->stats.rx_errors++;
 785                         dev_kfree_skb_any(skb);
 786                         goto next;
 787                 }
 788
 789                 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
 790                         netif_err(priv, rx_status, ndev, "fragmented packet!\n");
 791                         ndev->stats.rx_dropped++;
 792                         ndev->stats.rx_errors++;
 793                         dev_kfree_skb_any(skb);
 794                         goto next;
 795                 }
 796
 797                 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
 798                         netif_err(priv, rx_err, ndev, "error packet\n");
 799                         if (status & RX_STATUS_OVFLOW)
 800                                 ndev->stats.rx_over_errors++;
 801                         ndev->stats.rx_dropped++;
 802                         ndev->stats.rx_errors++;
 803                         dev_kfree_skb_any(skb);
 804                         goto next;
 805                 }
 806
 807                 skb_put(skb, len);
 808
 809                 /* Hardware validated our checksum */
 810                 if (likely(status & DESC_L4_CSUM))
 811                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 812
 813                 /* Hardware pre-pends packets with 2bytes before Ethernet
 814                  * header plus we have the Receive Status Block, strip off all
 815                  * of this from the SKB.
 816                  */
 817                 skb_pull(skb, sizeof(*rsb) + 2);
 818                 len -= (sizeof(*rsb) + 2);
 819                 processed_bytes += len;
 820
 821                 /* UniMAC may forward CRC */
 822                 if (priv->crc_fwd) {
 823                         skb_trim(skb, len - ETH_FCS_LEN);
 824                         len -= ETH_FCS_LEN;
 825                 }
 826
 827                 skb->protocol = eth_type_trans(skb, ndev);
 828                 ndev->stats.rx_packets++;
 829                 ndev->stats.rx_bytes += len;
 830                 u64_stats_update_begin(&priv->syncp);
 831                 stats64->rx_packets++;
 832                 stats64->rx_bytes += len;
 833                 u64_stats_update_end(&priv->syncp);
 834
 835                 napi_gro_receive(&priv->napi, skb);
 836 next:
 837                 processed++;
 838                 priv->rx_read_ptr++;
 839
 840                 if (priv->rx_read_ptr == priv->num_rx_bds)
 841                         priv->rx_read_ptr = 0;
 842         }
 843
 844         priv->dim.packets = processed;
 845         priv->dim.bytes = processed_bytes;
 846
 847         return processed;
 848 }
 849
 850 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring,
 851                                        struct bcm_sysport_cb *cb,
 852                                        unsigned int *bytes_compl,
 853                                        unsigned int *pkts_compl)
 854 {
 855         struct bcm_sysport_priv *priv = ring->priv;
 856         struct device *kdev = &priv->pdev->dev;
 857
 858         if (cb->skb) {
 859                 *bytes_compl += cb->skb->len;
 860                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 861                                  dma_unmap_len(cb, dma_len),
 862                                  DMA_TO_DEVICE);
 863                 (*pkts_compl)++;
 864                 bcm_sysport_free_cb(cb);
 865         /* SKB fragment */
 866         } else if (dma_unmap_addr(cb, dma_addr)) {
 867                 *bytes_compl += dma_unmap_len(cb, dma_len);
 868                 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
 869                                dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
 870                 dma_unmap_addr_set(cb, dma_addr, 0);
 871         }
 872 }
 873
 874 /* Reclaim queued SKBs for transmission completion, lockless version */
 875 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 876                                              struct bcm_sysport_tx_ring *ring)
 877 {
 878         unsigned int pkts_compl = 0, bytes_compl = 0;
 879         struct net_device *ndev = priv->netdev;
 880         unsigned int txbds_processed = 0;
 881         struct bcm_sysport_cb *cb;
 882         unsigned int txbds_ready;
 883         unsigned int c_index;
 884         u32 hw_ind;
 885
 886         /* Clear status before servicing to reduce spurious interrupts */
 887         if (!ring->priv->is_lite)
 888                 intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR);
 889         else
 890                 intrl2_0_writel(ring->priv, BIT(ring->index +
 891                                 INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR);
 892
 893         /* Compute how many descriptors have been processed since last call */
 894         hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
 895         c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
 896         txbds_ready = (c_index - ring->c_index) & RING_CONS_INDEX_MASK;
 897
 898         netif_dbg(priv, tx_done, ndev,
 899                   "ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
 900                   ring->index, ring->c_index, c_index, txbds_ready);
 901
 902         while (txbds_processed < txbds_ready) {
 903                 cb = &ring->cbs[ring->clean_index];
 904                 bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl);
 905
 906                 ring->desc_count++;
 907                 txbds_processed++;
 908
 909                 if (likely(ring->clean_index < ring->size - 1))
 910                         ring->clean_index++;
 911                 else
 912                         ring->clean_index = 0;
 913         }
 914
 915         u64_stats_update_begin(&priv->syncp);
 916         ring->packets += pkts_compl;
 917         ring->bytes += bytes_compl;
 918         u64_stats_update_end(&priv->syncp);
 919
 920         ring->c_index = c_index;
 921
 922         netif_dbg(priv, tx_done, ndev,
 923                   "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
 924                   ring->index, ring->c_index, pkts_compl, bytes_compl);
 925
 926         return pkts_compl;
 927 }
 928
 929 /* Locked version of the per-ring TX reclaim routine */
 930 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 931                                            struct bcm_sysport_tx_ring *ring)
 932 {
 933         struct netdev_queue *txq;
 934         unsigned int released;
 935         unsigned long flags;
 936
 937         txq = netdev_get_tx_queue(priv->netdev, ring->index);
 938
 939         spin_lock_irqsave(&ring->lock, flags);
 940         released = __bcm_sysport_tx_reclaim(priv, ring);
 941         if (released)
 942                 netif_tx_wake_queue(txq);
 943
 944         spin_unlock_irqrestore(&ring->lock, flags);
 945
 946         return released;
 947 }
 948
 949 /* Locked version of the per-ring TX reclaim, but does not wake the queue */
 950 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv,
 951                                  struct bcm_sysport_tx_ring *ring)
 952 {
 953         unsigned long flags;
 954
 955         spin_lock_irqsave(&ring->lock, flags);
 956         __bcm_sysport_tx_reclaim(priv, ring);
 957         spin_unlock_irqrestore(&ring->lock, flags);
 958 }
 959
 960 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
 961 {
 962         struct bcm_sysport_tx_ring *ring =
 963                 container_of(napi, struct bcm_sysport_tx_ring, napi);
 964         unsigned int work_done = 0;
 965
 966         work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
 967
 968         if (work_done == 0) {
 969                 napi_complete(napi);
 970                 /* re-enable TX interrupt */
 971                 if (!ring->priv->is_lite)
 972                         intrl2_1_mask_clear(ring->priv, BIT(ring->index));
 973                 else
 974                         intrl2_0_mask_clear(ring->priv, BIT(ring->index +
 975                                             INTRL2_0_TDMA_MBDONE_SHIFT));
 976
 977                 return 0;
 978         }
 979
 980         return budget;
 981 }
 982
 983 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
 984 {
 985         unsigned int q;
 986
 987         for (q = 0; q < priv->netdev->num_tx_queues; q++)
 988                 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
 989 }
 990
 991 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
 992 {
 993         struct bcm_sysport_priv *priv =
 994                 container_of(napi, struct bcm_sysport_priv, napi);
 995         struct dim_sample dim_sample;
 996         unsigned int work_done = 0;
 997
 998         work_done = bcm_sysport_desc_rx(priv, budget);
 999
1000         priv->rx_c_index += work_done;
1001         priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
1002
1003         /* SYSTEMPORT Lite groups the producer/consumer index, producer is
1004          * maintained by HW, but writes to it will be ignore while RDMA
1005          * is active
1006          */
1007         if (!priv->is_lite)
1008                 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
1009         else
1010                 rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX);
1011
1012         if (work_done < budget) {
1013                 napi_complete_done(napi, work_done);
1014                 /* re-enable RX interrupts */
1015                 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
1016         }
1017
1018         if (priv->dim.use_dim) {
1019                 dim_update_sample(priv->dim.event_ctr, priv->dim.packets,
1020                                   priv->dim.bytes, &dim_sample);
1021                 net_dim(&priv->dim.dim, dim_sample);
1022         }
1023
1024         return work_done;
1025 }
1026
1027 static void mpd_enable_set(struct bcm_sysport_priv *priv, bool enable)
1028 {
1029         u32 reg, bit;
1030
1031         reg = umac_readl(priv, UMAC_MPD_CTRL);
1032         if (enable)
1033                 reg |= MPD_EN;
1034         else
1035                 reg &= ~MPD_EN;
1036         umac_writel(priv, reg, UMAC_MPD_CTRL);
1037
1038         if (priv->is_lite)
1039                 bit = RBUF_ACPI_EN_LITE;
1040         else
1041                 bit = RBUF_ACPI_EN;
1042
1043         reg = rbuf_readl(priv, RBUF_CONTROL);
1044         if (enable)
1045                 reg |= bit;
1046         else
1047                 reg &= ~bit;
1048         rbuf_writel(priv, reg, RBUF_CONTROL);
1049 }
1050
1051 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
1052 {
1053         unsigned int index;
1054         u32 reg;
1055
1056         /* Disable RXCHK, active filters and Broadcom tag matching */
1057         reg = rxchk_readl(priv, RXCHK_CONTROL);
1058         reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
1059                  RXCHK_BRCM_TAG_MATCH_SHIFT | RXCHK_EN | RXCHK_BRCM_TAG_EN);
1060         rxchk_writel(priv, reg, RXCHK_CONTROL);
1061
1062         /* Make sure we restore correct CID index in case HW lost
1063          * its context during deep idle state
1064          */
1065         for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
1066                 rxchk_writel(priv, priv->filters_loc[index] <<
1067                              RXCHK_BRCM_TAG_CID_SHIFT, RXCHK_BRCM_TAG(index));
1068                 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
1069         }
1070
1071         /* Clear the MagicPacket detection logic */
1072         mpd_enable_set(priv, false);
1073
1074         reg = intrl2_0_readl(priv, INTRL2_CPU_STATUS);
1075         if (reg & INTRL2_0_MPD)
1076                 netdev_info(priv->netdev, "Wake-on-LAN (MPD) interrupt!\n");
1077
1078         if (reg & INTRL2_0_BRCM_MATCH_TAG) {
1079                 reg = rxchk_readl(priv, RXCHK_BRCM_TAG_MATCH_STATUS) &
1080                                   RXCHK_BRCM_TAG_MATCH_MASK;
1081                 netdev_info(priv->netdev,
1082                             "Wake-on-LAN (filters 0x%02x) interrupt!\n", reg);
1083         }
1084
1085         netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
1086 }
1087
1088 static void bcm_sysport_dim_work(struct work_struct *work)
1089 {
1090         struct dim *dim = container_of(work, struct dim, work);
1091         struct bcm_sysport_net_dim *ndim =
1092                         container_of(dim, struct bcm_sysport_net_dim, dim);
1093         struct bcm_sysport_priv *priv =
1094                         container_of(ndim, struct bcm_sysport_priv, dim);
1095         struct dim_cq_moder cur_profile = net_dim_get_rx_moderation(dim->mode,
1096                                                                     dim->profile_ix);
1097
1098         bcm_sysport_set_rx_coalesce(priv, cur_profile.usec, cur_profile.pkts);
1099         dim->state = DIM_START_MEASURE;
1100 }
1101
1102 /* RX and misc interrupt routine */
1103 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
1104 {
1105         struct net_device *dev = dev_id;
1106         struct bcm_sysport_priv *priv = netdev_priv(dev);
1107         struct bcm_sysport_tx_ring *txr;
1108         unsigned int ring, ring_bit;
1109
1110         priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
1111                           ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
1112         intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
1113
1114         if (unlikely(priv->irq0_stat == 0)) {
1115                 netdev_warn(priv->netdev, "spurious RX interrupt\n");
1116                 return IRQ_NONE;
1117         }
1118
1119         if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
1120                 priv->dim.event_ctr++;
1121                 if (likely(napi_schedule_prep(&priv->napi))) {
1122                         /* disable RX interrupts */
1123                         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
1124                         __napi_schedule_irqoff(&priv->napi);
1125                 }
1126         }
1127
1128         /* TX ring is full, perform a full reclaim since we do not know
1129          * which one would trigger this interrupt
1130          */
1131         if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
1132                 bcm_sysport_tx_reclaim_all(priv);
1133
1134         if (!priv->is_lite)
1135                 goto out;
1136
1137         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1138                 ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT);
1139                 if (!(priv->irq0_stat & ring_bit))
1140                         continue;
1141
1142                 txr = &priv->tx_rings[ring];
1143
1144                 if (likely(napi_schedule_prep(&txr->napi))) {
1145                         intrl2_0_mask_set(priv, ring_bit);
1146                         __napi_schedule(&txr->napi);
1147                 }
1148         }
1149 out:
1150         return IRQ_HANDLED;
1151 }
1152
1153 /* TX interrupt service routine */
1154 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
1155 {
1156         struct net_device *dev = dev_id;
1157         struct bcm_sysport_priv *priv = netdev_priv(dev);
1158         struct bcm_sysport_tx_ring *txr;
1159         unsigned int ring;
1160
1161         priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
1162                                 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
1163         intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1164
1165         if (unlikely(priv->irq1_stat == 0)) {
1166                 netdev_warn(priv->netdev, "spurious TX interrupt\n");
1167                 return IRQ_NONE;
1168         }
1169
1170         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1171                 if (!(priv->irq1_stat & BIT(ring)))
1172                         continue;
1173
1174                 txr = &priv->tx_rings[ring];
1175
1176                 if (likely(napi_schedule_prep(&txr->napi))) {
1177                         intrl2_1_mask_set(priv, BIT(ring));
1178                         __napi_schedule_irqoff(&txr->napi);
1179                 }
1180         }
1181
1182         return IRQ_HANDLED;
1183 }
1184
1185 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
1186 {
1187         struct bcm_sysport_priv *priv = dev_id;
1188
1189         pm_wakeup_event(&priv->pdev->dev, 0);
1190
1191         return IRQ_HANDLED;
1192 }
1193
1194 #ifdef CONFIG_NET_POLL_CONTROLLER
1195 static void bcm_sysport_poll_controller(struct net_device *dev)
1196 {
1197         struct bcm_sysport_priv *priv = netdev_priv(dev);
1198
1199         disable_irq(priv->irq0);
1200         bcm_sysport_rx_isr(priv->irq0, priv);
1201         enable_irq(priv->irq0);
1202
1203         if (!priv->is_lite) {
1204                 disable_irq(priv->irq1);
1205                 bcm_sysport_tx_isr(priv->irq1, priv);
1206                 enable_irq(priv->irq1);
1207         }
1208 }
1209 #endif
1210
1211 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
1212                                               struct net_device *dev)
1213 {
1214         struct bcm_sysport_priv *priv = netdev_priv(dev);
1215         struct sk_buff *nskb;
1216         struct bcm_tsb *tsb;
1217         u32 csum_info;
1218         u8 ip_proto;
1219         u16 csum_start;
1220         __be16 ip_ver;
1221
1222         /* Re-allocate SKB if needed */
1223         if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
1224                 nskb = skb_realloc_headroom(skb, sizeof(*tsb));
1225                 if (!nskb) {
1226                         dev_kfree_skb_any(skb);
1227                         priv->mib.tx_realloc_tsb_failed++;
1228                         dev->stats.tx_errors++;
1229                         dev->stats.tx_dropped++;
1230                         return NULL;
1231                 }
1232                 dev_consume_skb_any(skb);
1233                 skb = nskb;
1234                 priv->mib.tx_realloc_tsb++;
1235         }
1236
1237         tsb = skb_push(skb, sizeof(*tsb));
1238         /* Zero-out TSB by default */
1239         memset(tsb, 0, sizeof(*tsb));
1240
1241         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1242                 ip_ver = skb->protocol;
1243                 switch (ip_ver) {
1244                 case htons(ETH_P_IP):
1245                         ip_proto = ip_hdr(skb)->protocol;
1246                         break;
1247                 case htons(ETH_P_IPV6):
1248                         ip_proto = ipv6_hdr(skb)->nexthdr;
1249                         break;
1250                 default:
1251                         return skb;
1252                 }
1253
1254                 /* Get the checksum offset and the L4 (transport) offset */
1255                 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
1256                 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
1257                 csum_info |= (csum_start << L4_PTR_SHIFT);
1258
1259                 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1260                         csum_info |= L4_LENGTH_VALID;
1261                         if (ip_proto == IPPROTO_UDP &&
1262                             ip_ver == htons(ETH_P_IP))
1263                                 csum_info |= L4_UDP;
1264                 } else {
1265                         csum_info = 0;
1266                 }
1267
1268                 tsb->l4_ptr_dest_map = csum_info;
1269         }
1270
1271         return skb;
1272 }
1273
1274 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
1275                                     struct net_device *dev)
1276 {
1277         struct bcm_sysport_priv *priv = netdev_priv(dev);
1278         struct device *kdev = &priv->pdev->dev;
1279         struct bcm_sysport_tx_ring *ring;
1280         struct bcm_sysport_cb *cb;
1281         struct netdev_queue *txq;
1282         u32 len_status, addr_lo;
1283         unsigned int skb_len;
1284         unsigned long flags;
1285         dma_addr_t mapping;
1286         u16 queue;
1287         int ret;
1288
1289         queue = skb_get_queue_mapping(skb);
1290         txq = netdev_get_tx_queue(dev, queue);
1291         ring = &priv->tx_rings[queue];
1292
1293         /* lock against tx reclaim in BH context and TX ring full interrupt */
1294         spin_lock_irqsave(&ring->lock, flags);
1295         if (unlikely(ring->desc_count == 0)) {
1296                 netif_tx_stop_queue(txq);
1297                 netdev_err(dev, "queue %d awake and ring full!\n", queue);
1298                 ret = NETDEV_TX_BUSY;
1299                 goto out;
1300         }
1301
1302         /* Insert TSB and checksum infos */
1303         if (priv->tsb_en) {
1304                 skb = bcm_sysport_insert_tsb(skb, dev);
1305                 if (!skb) {
1306                         ret = NETDEV_TX_OK;
1307                         goto out;
1308                 }
1309         }
1310
1311         skb_len = skb->len;
1312
1313         mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1314         if (dma_mapping_error(kdev, mapping)) {
1315                 priv->mib.tx_dma_failed++;
1316                 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
1317                           skb->data, skb_len);
1318                 ret = NETDEV_TX_OK;
1319                 goto out;
1320         }
1321
1322         /* Remember the SKB for future freeing */
1323         cb = &ring->cbs[ring->curr_desc];
1324         cb->skb = skb;
1325         dma_unmap_addr_set(cb, dma_addr, mapping);
1326         dma_unmap_len_set(cb, dma_len, skb_len);
1327
1328         addr_lo = lower_32_bits(mapping);
1329         len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
1330         len_status |= (skb_len << DESC_LEN_SHIFT);
1331         len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
1332                        DESC_STATUS_SHIFT;
1333         if (skb->ip_summed == CHECKSUM_PARTIAL)
1334                 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1335
1336         ring->curr_desc++;
1337         if (ring->curr_desc == ring->size)
1338                 ring->curr_desc = 0;
1339         ring->desc_count--;
1340
1341         /* Ports are latched, so write upper address first */
1342         tdma_writel(priv, len_status, TDMA_WRITE_PORT_HI(ring->index));
1343         tdma_writel(priv, addr_lo, TDMA_WRITE_PORT_LO(ring->index));
1344
1345         /* Check ring space and update SW control flow */
1346         if (ring->desc_count == 0)
1347                 netif_tx_stop_queue(txq);
1348
1349         netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
1350                   ring->index, ring->desc_count, ring->curr_desc);
1351
1352         ret = NETDEV_TX_OK;
1353 out:
1354         spin_unlock_irqrestore(&ring->lock, flags);
1355         return ret;
1356 }
1357
1358 static void bcm_sysport_tx_timeout(struct net_device *dev)
1359 {
1360         netdev_warn(dev, "transmit timeout!\n");
1361
1362         netif_trans_update(dev);
1363         dev->stats.tx_errors++;
1364
1365         netif_tx_wake_all_queues(dev);
1366 }
1367
1368 /* phylib adjust link callback */
1369 static void bcm_sysport_adj_link(struct net_device *dev)
1370 {
1371         struct bcm_sysport_priv *priv = netdev_priv(dev);
1372         struct phy_device *phydev = dev->phydev;
1373         unsigned int changed = 0;
1374         u32 cmd_bits = 0, reg;
1375
1376         if (priv->old_link != phydev->link) {
1377                 changed = 1;
1378                 priv->old_link = phydev->link;
1379         }
1380
1381         if (priv->old_duplex != phydev->duplex) {
1382                 changed = 1;
1383                 priv->old_duplex = phydev->duplex;
1384         }
1385
1386         if (priv->is_lite)
1387                 goto out;
1388
1389         switch (phydev->speed) {
1390         case SPEED_2500:
1391                 cmd_bits = CMD_SPEED_2500;
1392                 break;
1393         case SPEED_1000:
1394                 cmd_bits = CMD_SPEED_1000;
1395                 break;
1396         case SPEED_100:
1397                 cmd_bits = CMD_SPEED_100;
1398                 break;
1399         case SPEED_10:
1400                 cmd_bits = CMD_SPEED_10;
1401                 break;
1402         default:
1403                 break;
1404         }
1405         cmd_bits <<= CMD_SPEED_SHIFT;
1406
1407         if (phydev->duplex == DUPLEX_HALF)
1408                 cmd_bits |= CMD_HD_EN;
1409
1410         if (priv->old_pause != phydev->pause) {
1411                 changed = 1;
1412                 priv->old_pause = phydev->pause;
1413         }
1414
1415         if (!phydev->pause)
1416                 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1417
1418         if (!changed)
1419                 return;
1420
1421         if (phydev->link) {
1422                 reg = umac_readl(priv, UMAC_CMD);
1423                 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
1424                         CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1425                         CMD_TX_PAUSE_IGNORE);
1426                 reg |= cmd_bits;
1427                 umac_writel(priv, reg, UMAC_CMD);
1428         }
1429 out:
1430         if (changed)
1431                 phy_print_status(phydev);
1432 }
1433
1434 static void bcm_sysport_init_dim(struct bcm_sysport_priv *priv,
1435                                  void (*cb)(struct work_struct *work))
1436 {
1437         struct bcm_sysport_net_dim *dim = &priv->dim;
1438
1439         INIT_WORK(&dim->dim.work, cb);
1440         dim->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1441         dim->event_ctr = 0;
1442         dim->packets = 0;
1443         dim->bytes = 0;
1444 }
1445
1446 static void bcm_sysport_init_rx_coalesce(struct bcm_sysport_priv *priv)
1447 {
1448         struct bcm_sysport_net_dim *dim = &priv->dim;
1449         struct dim_cq_moder moder;
1450         u32 usecs, pkts;
1451
1452         usecs = priv->rx_coalesce_usecs;
1453         pkts = priv->rx_max_coalesced_frames;
1454
1455         /* If DIM was enabled, re-apply default parameters */
1456         if (dim->use_dim) {
1457                 moder = net_dim_get_def_rx_moderation(dim->dim.mode);
1458                 usecs = moder.usec;
1459                 pkts = moder.pkts;
1460         }
1461
1462         bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
1463 }
1464
1465 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1466                                     unsigned int index)
1467 {
1468         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1469         size_t size;
1470         u32 reg;
1471
1472         /* Simple descriptors partitioning for now */
1473         size = 256;
1474
1475         ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1476         if (!ring->cbs) {
1477                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1478                 return -ENOMEM;
1479         }
1480
1481         /* Initialize SW view of the ring */
1482         spin_lock_init(&ring->lock);
1483         ring->priv = priv;
1484         netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64);
1485         ring->index = index;
1486         ring->size = size;
1487         ring->clean_index = 0;
1488         ring->alloc_size = ring->size;
1489         ring->desc_count = ring->size;
1490         ring->curr_desc = 0;
1491
1492         /* Initialize HW ring */
1493         tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1494         tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1495         tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1496         tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1497
1498         /* Configure QID and port mapping */
1499         reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index));
1500         reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT);
1501         if (ring->inspect) {
1502                 reg |= ring->switch_queue & RING_QID_MASK;
1503                 reg |= ring->switch_port << RING_PORT_ID_SHIFT;
1504         } else {
1505                 reg |= RING_IGNORE_STATUS;
1506         }
1507         tdma_writel(priv, reg, TDMA_DESC_RING_MAPPING(index));
1508         tdma_writel(priv, 0, TDMA_DESC_RING_PCP_DEI_VID(index));
1509
1510         /* Enable ACB algorithm 2 */
1511         reg = tdma_readl(priv, TDMA_CONTROL);
1512         reg |= tdma_control_bit(priv, ACB_ALGO);
1513         tdma_writel(priv, reg, TDMA_CONTROL);
1514
1515         /* Do not use tdma_control_bit() here because TSB_SWAP1 collides
1516          * with the original definition of ACB_ALGO
1517          */
1518         reg = tdma_readl(priv, TDMA_CONTROL);
1519         if (priv->is_lite)
1520                 reg &= ~BIT(TSB_SWAP1);
1521         /* Set a correct TSB format based on host endian */
1522         if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1523                 reg |= tdma_control_bit(priv, TSB_SWAP0);
1524         else
1525                 reg &= ~tdma_control_bit(priv, TSB_SWAP0);
1526         tdma_writel(priv, reg, TDMA_CONTROL);
1527
1528         /* Program the number of descriptors as MAX_THRESHOLD and half of
1529          * its size for the hysteresis trigger
1530          */
1531         tdma_writel(priv, ring->size |
1532                         1 << RING_HYST_THRESH_SHIFT,
1533                         TDMA_DESC_RING_MAX_HYST(index));
1534
1535         /* Enable the ring queue in the arbiter */
1536         reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1537         reg |= (1 << index);
1538         tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1539
1540         napi_enable(&ring->napi);
1541
1542         netif_dbg(priv, hw, priv->netdev,
1543                   "TDMA cfg, size=%d, switch q=%d,port=%d\n",
1544                   ring->size, ring->switch_queue,
1545                   ring->switch_port);
1546
1547         return 0;
1548 }
1549
1550 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1551                                      unsigned int index)
1552 {
1553         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1554         u32 reg;
1555
1556         /* Caller should stop the TDMA engine */
1557         reg = tdma_readl(priv, TDMA_STATUS);
1558         if (!(reg & TDMA_DISABLED))
1559                 netdev_warn(priv->netdev, "TDMA not stopped!\n");
1560
1561         /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1562          * fail, so by checking this pointer we know whether the TX ring was
1563          * fully initialized or not.
1564          */
1565         if (!ring->cbs)
1566                 return;
1567
1568         napi_disable(&ring->napi);
1569         netif_napi_del(&ring->napi);
1570
1571         bcm_sysport_tx_clean(priv, ring);
1572
1573         kfree(ring->cbs);
1574         ring->cbs = NULL;
1575         ring->size = 0;
1576         ring->alloc_size = 0;
1577
1578         netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1579 }
1580
1581 /* RDMA helper */
1582 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1583                                   unsigned int enable)
1584 {
1585         unsigned int timeout = 1000;
1586         u32 reg;
1587
1588         reg = rdma_readl(priv, RDMA_CONTROL);
1589         if (enable)
1590                 reg |= RDMA_EN;
1591         else
1592                 reg &= ~RDMA_EN;
1593         rdma_writel(priv, reg, RDMA_CONTROL);
1594
1595         /* Poll for RMDA disabling completion */
1596         do {
1597                 reg = rdma_readl(priv, RDMA_STATUS);
1598                 if (!!(reg & RDMA_DISABLED) == !enable)
1599                         return 0;
1600                 usleep_range(1000, 2000);
1601         } while (timeout-- > 0);
1602
1603         netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1604
1605         return -ETIMEDOUT;
1606 }
1607
1608 /* TDMA helper */
1609 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1610                                   unsigned int enable)
1611 {
1612         unsigned int timeout = 1000;
1613         u32 reg;
1614
1615         reg = tdma_readl(priv, TDMA_CONTROL);
1616         if (enable)
1617                 reg |= tdma_control_bit(priv, TDMA_EN);
1618         else
1619                 reg &= ~tdma_control_bit(priv, TDMA_EN);
1620         tdma_writel(priv, reg, TDMA_CONTROL);
1621
1622         /* Poll for TMDA disabling completion */
1623         do {
1624                 reg = tdma_readl(priv, TDMA_STATUS);
1625                 if (!!(reg & TDMA_DISABLED) == !enable)
1626                         return 0;
1627
1628                 usleep_range(1000, 2000);
1629         } while (timeout-- > 0);
1630
1631         netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1632
1633         return -ETIMEDOUT;
1634 }
1635
1636 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1637 {
1638         struct bcm_sysport_cb *cb;
1639         u32 reg;
1640         int ret;
1641         int i;
1642
1643         /* Initialize SW view of the RX ring */
1644         priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC;
1645         priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1646         priv->rx_c_index = 0;
1647         priv->rx_read_ptr = 0;
1648         priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1649                                 GFP_KERNEL);
1650         if (!priv->rx_cbs) {
1651                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1652                 return -ENOMEM;
1653         }
1654
1655         for (i = 0; i < priv->num_rx_bds; i++) {
1656                 cb = priv->rx_cbs + i;
1657                 cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1658         }
1659
1660         ret = bcm_sysport_alloc_rx_bufs(priv);
1661         if (ret) {
1662                 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1663                 return ret;
1664         }
1665
1666         /* Initialize HW, ensure RDMA is disabled */
1667         reg = rdma_readl(priv, RDMA_STATUS);
1668         if (!(reg & RDMA_DISABLED))
1669                 rdma_enable_set(priv, 0);
1670
1671         rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1672         rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1673         rdma_writel(priv, 0, RDMA_PROD_INDEX);
1674         rdma_writel(priv, 0, RDMA_CONS_INDEX);
1675         rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1676                           RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1677         /* Operate the queue in ring mode */
1678         rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1679         rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1680         rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1681         rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO);
1682
1683         netif_dbg(priv, hw, priv->netdev,
1684                   "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1685                   priv->num_rx_bds, priv->rx_bds);
1686
1687         return 0;
1688 }
1689
1690 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1691 {
1692         struct bcm_sysport_cb *cb;
1693         unsigned int i;
1694         u32 reg;
1695
1696         /* Caller should ensure RDMA is disabled */
1697         reg = rdma_readl(priv, RDMA_STATUS);
1698         if (!(reg & RDMA_DISABLED))
1699                 netdev_warn(priv->netdev, "RDMA not stopped!\n");
1700
1701         for (i = 0; i < priv->num_rx_bds; i++) {
1702                 cb = &priv->rx_cbs[i];
1703                 if (dma_unmap_addr(cb, dma_addr))
1704                         dma_unmap_single(&priv->pdev->dev,
1705                                          dma_unmap_addr(cb, dma_addr),
1706                                          RX_BUF_LENGTH, DMA_FROM_DEVICE);
1707                 bcm_sysport_free_cb(cb);
1708         }
1709
1710         kfree(priv->rx_cbs);
1711         priv->rx_cbs = NULL;
1712
1713         netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1714 }
1715
1716 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1717 {
1718         struct bcm_sysport_priv *priv = netdev_priv(dev);
1719         u32 reg;
1720
1721         if (priv->is_lite)
1722                 return;
1723
1724         reg = umac_readl(priv, UMAC_CMD);
1725         if (dev->flags & IFF_PROMISC)
1726                 reg |= CMD_PROMISC;
1727         else
1728                 reg &= ~CMD_PROMISC;
1729         umac_writel(priv, reg, UMAC_CMD);
1730
1731         /* No support for ALLMULTI */
1732         if (dev->flags & IFF_ALLMULTI)
1733                 return;
1734 }
1735
1736 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1737                                    u32 mask, unsigned int enable)
1738 {
1739         u32 reg;
1740
1741         if (!priv->is_lite) {
1742                 reg = umac_readl(priv, UMAC_CMD);
1743                 if (enable)
1744                         reg |= mask;
1745                 else
1746                         reg &= ~mask;
1747                 umac_writel(priv, reg, UMAC_CMD);
1748         } else {
1749                 reg = gib_readl(priv, GIB_CONTROL);
1750                 if (enable)
1751                         reg |= mask;
1752                 else
1753                         reg &= ~mask;
1754                 gib_writel(priv, reg, GIB_CONTROL);
1755         }
1756
1757         /* UniMAC stops on a packet boundary, wait for a full-sized packet
1758          * to be processed (1 msec).
1759          */
1760         if (enable == 0)
1761                 usleep_range(1000, 2000);
1762 }
1763
1764 static inline void umac_reset(struct bcm_sysport_priv *priv)
1765 {
1766         u32 reg;
1767
1768         if (priv->is_lite)
1769                 return;
1770
1771         reg = umac_readl(priv, UMAC_CMD);
1772         reg |= CMD_SW_RESET;
1773         umac_writel(priv, reg, UMAC_CMD);
1774         udelay(10);
1775         reg = umac_readl(priv, UMAC_CMD);
1776         reg &= ~CMD_SW_RESET;
1777         umac_writel(priv, reg, UMAC_CMD);
1778 }
1779
1780 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1781                              unsigned char *addr)
1782 {
1783         u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) |
1784                     addr[3];
1785         u32 mac1 = (addr[4] << 8) | addr[5];
1786
1787         if (!priv->is_lite) {
1788                 umac_writel(priv, mac0, UMAC_MAC0);
1789                 umac_writel(priv, mac1, UMAC_MAC1);
1790         } else {
1791                 gib_writel(priv, mac0, GIB_MAC0);
1792                 gib_writel(priv, mac1, GIB_MAC1);
1793         }
1794 }
1795
1796 static void topctrl_flush(struct bcm_sysport_priv *priv)
1797 {
1798         topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1799         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1800         mdelay(1);
1801         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1802         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1803 }
1804
1805 static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1806 {
1807         struct bcm_sysport_priv *priv = netdev_priv(dev);
1808         struct sockaddr *addr = p;
1809
1810         if (!is_valid_ether_addr(addr->sa_data))
1811                 return -EINVAL;
1812
1813         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1814
1815         /* interface is disabled, changes to MAC will be reflected on next
1816          * open call
1817          */
1818         if (!netif_running(dev))
1819                 return 0;
1820
1821         umac_set_hw_addr(priv, dev->dev_addr);
1822
1823         return 0;
1824 }
1825
1826 static void bcm_sysport_get_stats64(struct net_device *dev,
1827                                     struct rtnl_link_stats64 *stats)
1828 {
1829         struct bcm_sysport_priv *priv = netdev_priv(dev);
1830         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
1831         unsigned int start;
1832
1833         netdev_stats_to_stats64(stats, &dev->stats);
1834
1835         bcm_sysport_update_tx_stats(priv, &stats->tx_bytes,
1836                                     &stats->tx_packets);
1837
1838         do {
1839                 start = u64_stats_fetch_begin_irq(&priv->syncp);
1840                 stats->rx_packets = stats64->rx_packets;
1841                 stats->rx_bytes = stats64->rx_bytes;
1842         } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
1843 }
1844
1845 static void bcm_sysport_netif_start(struct net_device *dev)
1846 {
1847         struct bcm_sysport_priv *priv = netdev_priv(dev);
1848
1849         /* Enable NAPI */
1850         bcm_sysport_init_dim(priv, bcm_sysport_dim_work);
1851         bcm_sysport_init_rx_coalesce(priv);
1852         napi_enable(&priv->napi);
1853
1854         /* Enable RX interrupt and TX ring full interrupt */
1855         intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1856
1857         phy_start(dev->phydev);
1858
1859         /* Enable TX interrupts for the TXQs */
1860         if (!priv->is_lite)
1861                 intrl2_1_mask_clear(priv, 0xffffffff);
1862         else
1863                 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK);
1864 }
1865
1866 static void rbuf_init(struct bcm_sysport_priv *priv)
1867 {
1868         u32 reg;
1869
1870         reg = rbuf_readl(priv, RBUF_CONTROL);
1871         reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1872         /* Set a correct RSB format on SYSTEMPORT Lite */
1873         if (priv->is_lite)
1874                 reg &= ~RBUF_RSB_SWAP1;
1875
1876         /* Set a correct RSB format based on host endian */
1877         if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1878                 reg |= RBUF_RSB_SWAP0;
1879         else
1880                 reg &= ~RBUF_RSB_SWAP0;
1881         rbuf_writel(priv, reg, RBUF_CONTROL);
1882 }
1883
1884 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv)
1885 {
1886         intrl2_0_mask_set(priv, 0xffffffff);
1887         intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1888         if (!priv->is_lite) {
1889                 intrl2_1_mask_set(priv, 0xffffffff);
1890                 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1891         }
1892 }
1893
1894 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv)
1895 {
1896         u32 reg;
1897
1898         reg = gib_readl(priv, GIB_CONTROL);
1899         /* Include Broadcom tag in pad extension and fix up IPG_LENGTH */
1900         if (netdev_uses_dsa(priv->netdev)) {
1901                 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT);
1902                 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT;
1903         }
1904         reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT);
1905         reg |= 12 << GIB_IPG_LEN_SHIFT;
1906         gib_writel(priv, reg, GIB_CONTROL);
1907 }
1908
1909 static int bcm_sysport_open(struct net_device *dev)
1910 {
1911         struct bcm_sysport_priv *priv = netdev_priv(dev);
1912         struct phy_device *phydev;
1913         unsigned int i;
1914         int ret;
1915
1916         /* Reset UniMAC */
1917         umac_reset(priv);
1918
1919         /* Flush TX and RX FIFOs at TOPCTRL level */
1920         topctrl_flush(priv);
1921
1922         /* Disable the UniMAC RX/TX */
1923         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1924
1925         /* Enable RBUF 2bytes alignment and Receive Status Block */
1926         rbuf_init(priv);
1927
1928         /* Set maximum frame length */
1929         if (!priv->is_lite)
1930                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1931         else
1932                 gib_set_pad_extension(priv);
1933
1934         /* Apply features again in case we changed them while interface was
1935          * down
1936          */
1937         bcm_sysport_set_features(dev, dev->features);
1938
1939         /* Set MAC address */
1940         umac_set_hw_addr(priv, dev->dev_addr);
1941
1942         phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1943                                 0, priv->phy_interface);
1944         if (!phydev) {
1945                 netdev_err(dev, "could not attach to PHY\n");
1946                 return -ENODEV;
1947         }
1948
1949         /* Reset house keeping link status */
1950         priv->old_duplex = -1;
1951         priv->old_link = -1;
1952         priv->old_pause = -1;
1953
1954         /* mask all interrupts and request them */
1955         bcm_sysport_mask_all_intrs(priv);
1956
1957         ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
1958         if (ret) {
1959                 netdev_err(dev, "failed to request RX interrupt\n");
1960                 goto out_phy_disconnect;
1961         }
1962
1963         if (!priv->is_lite) {
1964                 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0,
1965                                   dev->name, dev);
1966                 if (ret) {
1967                         netdev_err(dev, "failed to request TX interrupt\n");
1968                         goto out_free_irq0;
1969                 }
1970         }
1971
1972         /* Initialize both hardware and software ring */
1973         for (i = 0; i < dev->num_tx_queues; i++) {
1974                 ret = bcm_sysport_init_tx_ring(priv, i);
1975                 if (ret) {
1976                         netdev_err(dev, "failed to initialize TX ring %d\n",
1977                                    i);
1978                         goto out_free_tx_ring;
1979                 }
1980         }
1981
1982         /* Initialize linked-list */
1983         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
1984
1985         /* Initialize RX ring */
1986         ret = bcm_sysport_init_rx_ring(priv);
1987         if (ret) {
1988                 netdev_err(dev, "failed to initialize RX ring\n");
1989                 goto out_free_rx_ring;
1990         }
1991
1992         /* Turn on RDMA */
1993         ret = rdma_enable_set(priv, 1);
1994         if (ret)
1995                 goto out_free_rx_ring;
1996
1997         /* Turn on TDMA */
1998         ret = tdma_enable_set(priv, 1);
1999         if (ret)
2000                 goto out_clear_rx_int;
2001
2002         /* Turn on UniMAC TX/RX */
2003         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
2004
2005         bcm_sysport_netif_start(dev);
2006
2007         netif_tx_start_all_queues(dev);
2008
2009         return 0;
2010
2011 out_clear_rx_int:
2012         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
2013 out_free_rx_ring:
2014         bcm_sysport_fini_rx_ring(priv);
2015 out_free_tx_ring:
2016         for (i = 0; i < dev->num_tx_queues; i++)
2017                 bcm_sysport_fini_tx_ring(priv, i);
2018         if (!priv->is_lite)
2019                 free_irq(priv->irq1, dev);
2020 out_free_irq0:
2021         free_irq(priv->irq0, dev);
2022 out_phy_disconnect:
2023         phy_disconnect(phydev);
2024         return ret;
2025 }
2026
2027 static void bcm_sysport_netif_stop(struct net_device *dev)
2028 {
2029         struct bcm_sysport_priv *priv = netdev_priv(dev);
2030
2031         /* stop all software from updating hardware */
2032         netif_tx_disable(dev);
2033         napi_disable(&priv->napi);
2034         cancel_work_sync(&priv->dim.dim.work);
2035         phy_stop(dev->phydev);
2036
2037         /* mask all interrupts */
2038         bcm_sysport_mask_all_intrs(priv);
2039 }
2040
2041 static int bcm_sysport_stop(struct net_device *dev)
2042 {
2043         struct bcm_sysport_priv *priv = netdev_priv(dev);
2044         unsigned int i;
2045         int ret;
2046
2047         bcm_sysport_netif_stop(dev);
2048
2049         /* Disable UniMAC RX */
2050         umac_enable_set(priv, CMD_RX_EN, 0);
2051
2052         ret = tdma_enable_set(priv, 0);
2053         if (ret) {
2054                 netdev_err(dev, "timeout disabling RDMA\n");
2055                 return ret;
2056         }
2057
2058         /* Wait for a maximum packet size to be drained */
2059         usleep_range(2000, 3000);
2060
2061         ret = rdma_enable_set(priv, 0);
2062         if (ret) {
2063                 netdev_err(dev, "timeout disabling TDMA\n");
2064                 return ret;
2065         }
2066
2067         /* Disable UniMAC TX */
2068         umac_enable_set(priv, CMD_TX_EN, 0);
2069
2070         /* Free RX/TX rings SW structures */
2071         for (i = 0; i < dev->num_tx_queues; i++)
2072                 bcm_sysport_fini_tx_ring(priv, i);
2073         bcm_sysport_fini_rx_ring(priv);
2074
2075         free_irq(priv->irq0, dev);
2076         if (!priv->is_lite)
2077                 free_irq(priv->irq1, dev);
2078
2079         /* Disconnect from PHY */
2080         phy_disconnect(dev->phydev);
2081
2082         return 0;
2083 }
2084
2085 static int bcm_sysport_rule_find(struct bcm_sysport_priv *priv,
2086                                  u64 location)
2087 {
2088         unsigned int index;
2089         u32 reg;
2090
2091         for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2092                 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2093                 reg >>= RXCHK_BRCM_TAG_CID_SHIFT;
2094                 reg &= RXCHK_BRCM_TAG_CID_MASK;
2095                 if (reg == location)
2096                         return index;
2097         }
2098
2099         return -EINVAL;
2100 }
2101
2102 static int bcm_sysport_rule_get(struct bcm_sysport_priv *priv,
2103                                 struct ethtool_rxnfc *nfc)
2104 {
2105         int index;
2106
2107         /* This is not a rule that we know about */
2108         index = bcm_sysport_rule_find(priv, nfc->fs.location);
2109         if (index < 0)
2110                 return -EOPNOTSUPP;
2111
2112         nfc->fs.ring_cookie = RX_CLS_FLOW_WAKE;
2113
2114         return 0;
2115 }
2116
2117 static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv,
2118                                 struct ethtool_rxnfc *nfc)
2119 {
2120         unsigned int index;
2121         u32 reg;
2122
2123         /* We cannot match locations greater than what the classification ID
2124          * permits (256 entries)
2125          */
2126         if (nfc->fs.location > RXCHK_BRCM_TAG_CID_MASK)
2127                 return -E2BIG;
2128
2129         /* We cannot support flows that are not destined for a wake-up */
2130         if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE)
2131                 return -EOPNOTSUPP;
2132
2133         /* All filters are already in use, we cannot match more rules */
2134         if (bitmap_weight(priv->filters, RXCHK_BRCM_TAG_MAX) ==
2135             RXCHK_BRCM_TAG_MAX)
2136                 return -ENOSPC;
2137
2138         index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX);
2139         if (index > RXCHK_BRCM_TAG_MAX)
2140                 return -ENOSPC;
2141
2142         /* Location is the classification ID, and index is the position
2143          * within one of our 8 possible filters to be programmed
2144          */
2145         reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2146         reg &= ~(RXCHK_BRCM_TAG_CID_MASK << RXCHK_BRCM_TAG_CID_SHIFT);
2147         reg |= nfc->fs.location << RXCHK_BRCM_TAG_CID_SHIFT;
2148         rxchk_writel(priv, reg, RXCHK_BRCM_TAG(index));
2149         rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
2150
2151         priv->filters_loc[index] = nfc->fs.location;
2152         set_bit(index, priv->filters);
2153
2154         return 0;
2155 }
2156
2157 static int bcm_sysport_rule_del(struct bcm_sysport_priv *priv,
2158                                 u64 location)
2159 {
2160         int index;
2161
2162         /* This is not a rule that we know about */
2163         index = bcm_sysport_rule_find(priv, location);
2164         if (index < 0)
2165                 return -EOPNOTSUPP;
2166
2167         /* No need to disable this filter if it was enabled, this will
2168          * be taken care of during suspend time by bcm_sysport_suspend_to_wol
2169          */
2170         clear_bit(index, priv->filters);
2171         priv->filters_loc[index] = 0;
2172
2173         return 0;
2174 }
2175
2176 static int bcm_sysport_get_rxnfc(struct net_device *dev,
2177                                  struct ethtool_rxnfc *nfc, u32 *rule_locs)
2178 {
2179         struct bcm_sysport_priv *priv = netdev_priv(dev);
2180         int ret = -EOPNOTSUPP;
2181
2182         switch (nfc->cmd) {
2183         case ETHTOOL_GRXCLSRULE:
2184                 ret = bcm_sysport_rule_get(priv, nfc);
2185                 break;
2186         default:
2187                 break;
2188         }
2189
2190         return ret;
2191 }
2192
2193 static int bcm_sysport_set_rxnfc(struct net_device *dev,
2194                                  struct ethtool_rxnfc *nfc)
2195 {
2196         struct bcm_sysport_priv *priv = netdev_priv(dev);
2197         int ret = -EOPNOTSUPP;
2198
2199         switch (nfc->cmd) {
2200         case ETHTOOL_SRXCLSRLINS:
2201                 ret = bcm_sysport_rule_set(priv, nfc);
2202                 break;
2203         case ETHTOOL_SRXCLSRLDEL:
2204                 ret = bcm_sysport_rule_del(priv, nfc->fs.location);
2205                 break;
2206         default:
2207                 break;
2208         }
2209
2210         return ret;
2211 }
2212
2213 static const struct ethtool_ops bcm_sysport_ethtool_ops = {
2214         .get_drvinfo            = bcm_sysport_get_drvinfo,
2215         .get_msglevel           = bcm_sysport_get_msglvl,
2216         .set_msglevel           = bcm_sysport_set_msglvl,
2217         .get_link               = ethtool_op_get_link,
2218         .get_strings            = bcm_sysport_get_strings,
2219         .get_ethtool_stats      = bcm_sysport_get_stats,
2220         .get_sset_count         = bcm_sysport_get_sset_count,
2221         .get_wol                = bcm_sysport_get_wol,
2222         .set_wol                = bcm_sysport_set_wol,
2223         .get_coalesce           = bcm_sysport_get_coalesce,
2224         .set_coalesce           = bcm_sysport_set_coalesce,
2225         .get_link_ksettings     = phy_ethtool_get_link_ksettings,
2226         .set_link_ksettings     = phy_ethtool_set_link_ksettings,
2227         .get_rxnfc              = bcm_sysport_get_rxnfc,
2228         .set_rxnfc              = bcm_sysport_set_rxnfc,
2229 };
2230
2231 static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb,
2232                                     struct net_device *sb_dev)
2233 {
2234         struct bcm_sysport_priv *priv = netdev_priv(dev);
2235         u16 queue = skb_get_queue_mapping(skb);
2236         struct bcm_sysport_tx_ring *tx_ring;
2237         unsigned int q, port;
2238
2239         if (!netdev_uses_dsa(dev))
2240                 return netdev_pick_tx(dev, skb, NULL);
2241
2242         /* DSA tagging layer will have configured the correct queue */
2243         q = BRCM_TAG_GET_QUEUE(queue);
2244         port = BRCM_TAG_GET_PORT(queue);
2245         tx_ring = priv->ring_map[q + port * priv->per_port_num_tx_queues];
2246
2247         if (unlikely(!tx_ring))
2248                 return netdev_pick_tx(dev, skb, NULL);
2249
2250         return tx_ring->index;
2251 }
2252
2253 static const struct net_device_ops bcm_sysport_netdev_ops = {
2254         .ndo_start_xmit         = bcm_sysport_xmit,
2255         .ndo_tx_timeout         = bcm_sysport_tx_timeout,
2256         .ndo_open               = bcm_sysport_open,
2257         .ndo_stop               = bcm_sysport_stop,
2258         .ndo_set_features       = bcm_sysport_set_features,
2259         .ndo_set_rx_mode        = bcm_sysport_set_rx_mode,
2260         .ndo_set_mac_address    = bcm_sysport_change_mac,
2261 #ifdef CONFIG_NET_POLL_CONTROLLER
2262         .ndo_poll_controller    = bcm_sysport_poll_controller,
2263 #endif
2264         .ndo_get_stats64        = bcm_sysport_get_stats64,
2265         .ndo_select_queue       = bcm_sysport_select_queue,
2266 };
2267
2268 static int bcm_sysport_map_queues(struct notifier_block *nb,
2269                                   struct dsa_notifier_register_info *info)
2270 {
2271         struct bcm_sysport_tx_ring *ring;
2272         struct bcm_sysport_priv *priv;
2273         struct net_device *slave_dev;
2274         unsigned int num_tx_queues;
2275         unsigned int q, qp, port;
2276         struct net_device *dev;
2277
2278         priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2279         if (priv->netdev != info->master)
2280                 return 0;
2281
2282         dev = info->master;
2283
2284         /* We can't be setting up queue inspection for non directly attached
2285          * switches
2286          */
2287         if (info->switch_number)
2288                 return 0;
2289
2290         if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2291                 return 0;
2292
2293         port = info->port_number;
2294         slave_dev = info->info.dev;
2295
2296         /* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a
2297          * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of
2298          * per-port (slave_dev) network devices queue, we achieve just that.
2299          * This need to happen now before any slave network device is used such
2300          * it accurately reflects the number of real TX queues.
2301          */
2302         if (priv->is_lite)
2303                 netif_set_real_num_tx_queues(slave_dev,
2304                                              slave_dev->num_tx_queues / 2);
2305
2306         num_tx_queues = slave_dev->real_num_tx_queues;
2307
2308         if (priv->per_port_num_tx_queues &&
2309             priv->per_port_num_tx_queues != num_tx_queues)
2310                 netdev_warn(slave_dev, "asymmetric number of per-port queues\n");
2311
2312         priv->per_port_num_tx_queues = num_tx_queues;
2313
2314         for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues;
2315              q++) {
2316                 ring = &priv->tx_rings[q];
2317
2318                 if (ring->inspect)
2319                         continue;
2320
2321                 /* Just remember the mapping actual programming done
2322                  * during bcm_sysport_init_tx_ring
2323                  */
2324                 ring->switch_queue = qp;
2325                 ring->switch_port = port;
2326                 ring->inspect = true;
2327                 priv->ring_map[q + port * num_tx_queues] = ring;
2328                 qp++;
2329         }
2330
2331         return 0;
2332 }
2333
2334 static int bcm_sysport_unmap_queues(struct notifier_block *nb,
2335                                     struct dsa_notifier_register_info *info)
2336 {
2337         struct bcm_sysport_tx_ring *ring;
2338         struct bcm_sysport_priv *priv;
2339         struct net_device *slave_dev;
2340         unsigned int num_tx_queues;
2341         struct net_device *dev;
2342         unsigned int q, port;
2343
2344         priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2345         if (priv->netdev != info->master)
2346                 return 0;
2347
2348         dev = info->master;
2349
2350         if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2351                 return 0;
2352
2353         port = info->port_number;
2354         slave_dev = info->info.dev;
2355
2356         num_tx_queues = slave_dev->real_num_tx_queues;
2357
2358         for (q = 0; q < dev->num_tx_queues; q++) {
2359                 ring = &priv->tx_rings[q];
2360
2361                 if (ring->switch_port != port)
2362                         continue;
2363
2364                 if (!ring->inspect)
2365                         continue;
2366
2367                 ring->inspect = false;
2368                 priv->ring_map[q + port * num_tx_queues] = NULL;
2369         }
2370
2371         return 0;
2372 }
2373
2374 static int bcm_sysport_dsa_notifier(struct notifier_block *nb,
2375                                     unsigned long event, void *ptr)
2376 {
2377         int ret = NOTIFY_DONE;
2378
2379         switch (event) {
2380         case DSA_PORT_REGISTER:
2381                 ret = bcm_sysport_map_queues(nb, ptr);
2382                 break;
2383         case DSA_PORT_UNREGISTER:
2384                 ret = bcm_sysport_unmap_queues(nb, ptr);
2385                 break;
2386         }
2387
2388         return notifier_from_errno(ret);
2389 }
2390
2391 #define REV_FMT "v%2x.%02x"
2392
2393 static const struct bcm_sysport_hw_params bcm_sysport_params[] = {
2394         [SYSTEMPORT] = {
2395                 .is_lite = false,
2396                 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS,
2397         },
2398         [SYSTEMPORT_LITE] = {
2399                 .is_lite = true,
2400                 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS,
2401         },
2402 };
2403
2404 static const struct of_device_id bcm_sysport_of_match[] = {
2405         { .compatible = "brcm,systemportlite-v1.00",
2406           .data = &bcm_sysport_params[SYSTEMPORT_LITE] },
2407         { .compatible = "brcm,systemport-v1.00",
2408           .data = &bcm_sysport_params[SYSTEMPORT] },
2409         { .compatible = "brcm,systemport",
2410           .data = &bcm_sysport_params[SYSTEMPORT] },
2411         { /* sentinel */ }
2412 };
2413 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
2414
2415 static int bcm_sysport_probe(struct platform_device *pdev)
2416 {
2417         const struct bcm_sysport_hw_params *params;
2418         const struct of_device_id *of_id = NULL;
2419         struct bcm_sysport_priv *priv;
2420         struct device_node *dn;
2421         struct net_device *dev;
2422         const void *macaddr;
2423         struct resource *r;
2424         u32 txq, rxq;
2425         int ret;
2426
2427         dn = pdev->dev.of_node;
2428         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2429         of_id = of_match_node(bcm_sysport_of_match, dn);
2430         if (!of_id || !of_id->data)
2431                 return -EINVAL;
2432
2433         /* Fairly quickly we need to know the type of adapter we have */
2434         params = of_id->data;
2435
2436         /* Read the Transmit/Receive Queue properties */
2437         if (of_property_read_u32(dn, "systemport,num-txq", &txq))
2438                 txq = TDMA_NUM_RINGS;
2439         if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
2440                 rxq = 1;
2441
2442         /* Sanity check the number of transmit queues */
2443         if (!txq || txq > TDMA_NUM_RINGS)
2444                 return -EINVAL;
2445
2446         dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
2447         if (!dev)
2448                 return -ENOMEM;
2449
2450         /* Initialize private members */
2451         priv = netdev_priv(dev);
2452
2453         /* Allocate number of TX rings */
2454         priv->tx_rings = devm_kcalloc(&pdev->dev, txq,
2455                                       sizeof(struct bcm_sysport_tx_ring),
2456                                       GFP_KERNEL);
2457         if (!priv->tx_rings)
2458                 return -ENOMEM;
2459
2460         priv->is_lite = params->is_lite;
2461         priv->num_rx_desc_words = params->num_rx_desc_words;
2462
2463         priv->irq0 = platform_get_irq(pdev, 0);
2464         if (!priv->is_lite) {
2465                 priv->irq1 = platform_get_irq(pdev, 1);
2466                 priv->wol_irq = platform_get_irq(pdev, 2);
2467         } else {
2468                 priv->wol_irq = platform_get_irq(pdev, 1);
2469         }
2470         if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) {
2471                 dev_err(&pdev->dev, "invalid interrupts\n");
2472                 ret = -EINVAL;
2473                 goto err_free_netdev;
2474         }
2475
2476         priv->base = devm_ioremap_resource(&pdev->dev, r);
2477         if (IS_ERR(priv->base)) {
2478                 ret = PTR_ERR(priv->base);
2479                 goto err_free_netdev;
2480         }
2481
2482         priv->netdev = dev;
2483         priv->pdev = pdev;
2484
2485         priv->phy_interface = of_get_phy_mode(dn);
2486         /* Default to GMII interface mode */
2487         if (priv->phy_interface < 0)
2488                 priv->phy_interface = PHY_INTERFACE_MODE_GMII;
2489
2490         /* In the case of a fixed PHY, the DT node associated
2491          * to the PHY is the Ethernet MAC DT node.
2492          */
2493         if (of_phy_is_fixed_link(dn)) {
2494                 ret = of_phy_register_fixed_link(dn);
2495                 if (ret) {
2496                         dev_err(&pdev->dev, "failed to register fixed PHY\n");
2497                         goto err_free_netdev;
2498                 }
2499
2500                 priv->phy_dn = dn;
2501         }
2502
2503         /* Initialize netdevice members */
2504         macaddr = of_get_mac_address(dn);
2505         if (IS_ERR(macaddr)) {
2506                 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
2507                 eth_hw_addr_random(dev);
2508         } else {
2509                 ether_addr_copy(dev->dev_addr, macaddr);
2510         }
2511
2512         SET_NETDEV_DEV(dev, &pdev->dev);
2513         dev_set_drvdata(&pdev->dev, dev);
2514         dev->ethtool_ops = &bcm_sysport_ethtool_ops;
2515         dev->netdev_ops = &bcm_sysport_netdev_ops;
2516         netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64);
2517
2518         dev->features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
2519                          NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2520         dev->hw_features |= dev->features;
2521         dev->vlan_features |= dev->features;
2522
2523         /* Request the WOL interrupt and advertise suspend if available */
2524         priv->wol_irq_disabled = 1;
2525         ret = devm_request_irq(&pdev->dev, priv->wol_irq,
2526                                bcm_sysport_wol_isr, 0, dev->name, priv);
2527         if (!ret)
2528                 device_set_wakeup_capable(&pdev->dev, 1);
2529
2530         /* Set the needed headroom once and for all */
2531         BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
2532         dev->needed_headroom += sizeof(struct bcm_tsb);
2533
2534         /* libphy will adjust the link state accordingly */
2535         netif_carrier_off(dev);
2536
2537         priv->rx_max_coalesced_frames = 1;
2538         u64_stats_init(&priv->syncp);
2539
2540         priv->dsa_notifier.notifier_call = bcm_sysport_dsa_notifier;
2541
2542         ret = register_dsa_notifier(&priv->dsa_notifier);
2543         if (ret) {
2544                 dev_err(&pdev->dev, "failed to register DSA notifier\n");
2545                 goto err_deregister_fixed_link;
2546         }
2547
2548         ret = register_netdev(dev);
2549         if (ret) {
2550                 dev_err(&pdev->dev, "failed to register net_device\n");
2551                 goto err_deregister_notifier;
2552         }
2553
2554         priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
2555         dev_info(&pdev->dev,
2556                  "Broadcom SYSTEMPORT%s " REV_FMT
2557                  " (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
2558                  priv->is_lite ? " Lite" : "",
2559                  (priv->rev >> 8) & 0xff, priv->rev & 0xff,
2560                  priv->irq0, priv->irq1, txq, rxq);
2561
2562         return 0;
2563
2564 err_deregister_notifier:
2565         unregister_dsa_notifier(&priv->dsa_notifier);
2566 err_deregister_fixed_link:
2567         if (of_phy_is_fixed_link(dn))
2568                 of_phy_deregister_fixed_link(dn);
2569 err_free_netdev:
2570         free_netdev(dev);
2571         return ret;
2572 }
2573
2574 static int bcm_sysport_remove(struct platform_device *pdev)
2575 {
2576         struct net_device *dev = dev_get_drvdata(&pdev->dev);
2577         struct bcm_sysport_priv *priv = netdev_priv(dev);
2578         struct device_node *dn = pdev->dev.of_node;
2579
2580         /* Not much to do, ndo_close has been called
2581          * and we use managed allocations
2582          */
2583         unregister_dsa_notifier(&priv->dsa_notifier);
2584         unregister_netdev(dev);
2585         if (of_phy_is_fixed_link(dn))
2586                 of_phy_deregister_fixed_link(dn);
2587         free_netdev(dev);
2588         dev_set_drvdata(&pdev->dev, NULL);
2589
2590         return 0;
2591 }
2592
2593 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
2594 {
2595         struct net_device *ndev = priv->netdev;
2596         unsigned int timeout = 1000;
2597         unsigned int index, i = 0;
2598         u32 reg;
2599
2600         reg = umac_readl(priv, UMAC_MPD_CTRL);
2601         if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE))
2602                 reg |= MPD_EN;
2603         reg &= ~PSW_EN;
2604         if (priv->wolopts & WAKE_MAGICSECURE) {
2605                 /* Program the SecureOn password */
2606                 umac_writel(priv, get_unaligned_be16(&priv->sopass[0]),
2607                             UMAC_PSW_MS);
2608                 umac_writel(priv, get_unaligned_be32(&priv->sopass[2]),
2609                             UMAC_PSW_LS);
2610                 reg |= PSW_EN;
2611         }
2612         umac_writel(priv, reg, UMAC_MPD_CTRL);
2613
2614         if (priv->wolopts & WAKE_FILTER) {
2615                 /* Turn on ACPI matching to steal packets from RBUF */
2616                 reg = rbuf_readl(priv, RBUF_CONTROL);
2617                 if (priv->is_lite)
2618                         reg |= RBUF_ACPI_EN_LITE;
2619                 else
2620                         reg |= RBUF_ACPI_EN;
2621                 rbuf_writel(priv, reg, RBUF_CONTROL);
2622
2623                 /* Enable RXCHK, active filters and Broadcom tag matching */
2624                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2625                 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
2626                          RXCHK_BRCM_TAG_MATCH_SHIFT);
2627                 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2628                         reg |= BIT(RXCHK_BRCM_TAG_MATCH_SHIFT + i);
2629                         i++;
2630                 }
2631                 reg |= RXCHK_EN | RXCHK_BRCM_TAG_EN;
2632                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2633         }
2634
2635         /* Make sure RBUF entered WoL mode as result */
2636         do {
2637                 reg = rbuf_readl(priv, RBUF_STATUS);
2638                 if (reg & RBUF_WOL_MODE)
2639                         break;
2640
2641                 udelay(10);
2642         } while (timeout-- > 0);
2643
2644         /* Do not leave the UniMAC RBUF matching only MPD packets */
2645         if (!timeout) {
2646                 mpd_enable_set(priv, false);
2647                 netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
2648                 return -ETIMEDOUT;
2649         }
2650
2651         /* UniMAC receive needs to be turned on */
2652         umac_enable_set(priv, CMD_RX_EN, 1);
2653
2654         netif_dbg(priv, wol, ndev, "entered WOL mode\n");
2655
2656         return 0;
2657 }
2658
2659 static int __maybe_unused bcm_sysport_suspend(struct device *d)
2660 {
2661         struct net_device *dev = dev_get_drvdata(d);
2662         struct bcm_sysport_priv *priv = netdev_priv(dev);
2663         unsigned int i;
2664         int ret = 0;
2665         u32 reg;
2666
2667         if (!netif_running(dev))
2668                 return 0;
2669
2670         netif_device_detach(dev);
2671
2672         bcm_sysport_netif_stop(dev);
2673
2674         phy_suspend(dev->phydev);
2675
2676         /* Disable UniMAC RX */
2677         umac_enable_set(priv, CMD_RX_EN, 0);
2678
2679         ret = rdma_enable_set(priv, 0);
2680         if (ret) {
2681                 netdev_err(dev, "RDMA timeout!\n");
2682                 return ret;
2683         }
2684
2685         /* Disable RXCHK if enabled */
2686         if (priv->rx_chk_en) {
2687                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2688                 reg &= ~RXCHK_EN;
2689                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2690         }
2691
2692         /* Flush RX pipe */
2693         if (!priv->wolopts)
2694                 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
2695
2696         ret = tdma_enable_set(priv, 0);
2697         if (ret) {
2698                 netdev_err(dev, "TDMA timeout!\n");
2699                 return ret;
2700         }
2701
2702         /* Wait for a packet boundary */
2703         usleep_range(2000, 3000);
2704
2705         umac_enable_set(priv, CMD_TX_EN, 0);
2706
2707         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
2708
2709         /* Free RX/TX rings SW structures */
2710         for (i = 0; i < dev->num_tx_queues; i++)
2711                 bcm_sysport_fini_tx_ring(priv, i);
2712         bcm_sysport_fini_rx_ring(priv);
2713
2714         /* Get prepared for Wake-on-LAN */
2715         if (device_may_wakeup(d) && priv->wolopts)
2716                 ret = bcm_sysport_suspend_to_wol(priv);
2717
2718         return ret;
2719 }
2720
2721 static int __maybe_unused bcm_sysport_resume(struct device *d)
2722 {
2723         struct net_device *dev = dev_get_drvdata(d);
2724         struct bcm_sysport_priv *priv = netdev_priv(dev);
2725         unsigned int i;
2726         int ret;
2727
2728         if (!netif_running(dev))
2729                 return 0;
2730
2731         umac_reset(priv);
2732
2733         /* We may have been suspended and never received a WOL event that
2734          * would turn off MPD detection, take care of that now
2735          */
2736         bcm_sysport_resume_from_wol(priv);
2737
2738         /* Initialize both hardware and software ring */
2739         for (i = 0; i < dev->num_tx_queues; i++) {
2740                 ret = bcm_sysport_init_tx_ring(priv, i);
2741                 if (ret) {
2742                         netdev_err(dev, "failed to initialize TX ring %d\n",
2743                                    i);
2744                         goto out_free_tx_rings;
2745                 }
2746         }
2747
2748         /* Initialize linked-list */
2749         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2750
2751         /* Initialize RX ring */
2752         ret = bcm_sysport_init_rx_ring(priv);
2753         if (ret) {
2754                 netdev_err(dev, "failed to initialize RX ring\n");
2755                 goto out_free_rx_ring;
2756         }
2757
2758         /* RX pipe enable */
2759         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2760
2761         ret = rdma_enable_set(priv, 1);
2762         if (ret) {
2763                 netdev_err(dev, "failed to enable RDMA\n");
2764                 goto out_free_rx_ring;
2765         }
2766
2767         /* Restore enabled features */
2768         bcm_sysport_set_features(dev, dev->features);
2769
2770         rbuf_init(priv);
2771
2772         /* Set maximum frame length */
2773         if (!priv->is_lite)
2774                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2775         else
2776                 gib_set_pad_extension(priv);
2777
2778         /* Set MAC address */
2779         umac_set_hw_addr(priv, dev->dev_addr);
2780
2781         umac_enable_set(priv, CMD_RX_EN, 1);
2782
2783         /* TX pipe enable */
2784         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2785
2786         umac_enable_set(priv, CMD_TX_EN, 1);
2787
2788         ret = tdma_enable_set(priv, 1);
2789         if (ret) {
2790                 netdev_err(dev, "TDMA timeout!\n");
2791                 goto out_free_rx_ring;
2792         }
2793
2794         phy_resume(dev->phydev);
2795
2796         bcm_sysport_netif_start(dev);
2797
2798         netif_device_attach(dev);
2799
2800         return 0;
2801
2802 out_free_rx_ring:
2803         bcm_sysport_fini_rx_ring(priv);
2804 out_free_tx_rings:
2805         for (i = 0; i < dev->num_tx_queues; i++)
2806                 bcm_sysport_fini_tx_ring(priv, i);
2807         return ret;
2808 }
2809
2810 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2811                 bcm_sysport_suspend, bcm_sysport_resume);
2812
2813 static struct platform_driver bcm_sysport_driver = {
2814         .probe  = bcm_sysport_probe,
2815         .remove = bcm_sysport_remove,
2816         .driver =  {
2817                 .name = "brcm-systemport",
2818                 .of_match_table = bcm_sysport_of_match,
2819                 .pm = &bcm_sysport_pm_ops,
2820         },
2821 };
2822 module_platform_driver(bcm_sysport_driver);
2823
2824 MODULE_AUTHOR("Broadcom Corporation");
2825 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2826 MODULE_ALIAS("platform:brcm-systemport");
2827 MODULE_LICENSE("GPL");