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