drivers/net/ethernet/broadcom/bcmsysport.c

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