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                                     NETIF_F_HW_VLAN_CTAG_TX));
 165         reg = tdma_readl(priv, TDMA_CONTROL);
 166         if (priv->tsb_en)
 167                 reg |= tdma_control_bit(priv, TSB_EN);
 168         else
 169                 reg &= ~tdma_control_bit(priv, TSB_EN);
 170         /* Indicating that software inserts Broadcom tags is needed for the TX
 171          * checksum to be computed correctly when using VLAN HW acceleration,
 172          * else it has no effect, so it can always be turned on.
 173          */
 174         if (netdev_uses_dsa(dev))
 175                 reg |= tdma_control_bit(priv, SW_BRCM_TAG);
 176         else
 177                 reg &= ~tdma_control_bit(priv, SW_BRCM_TAG);
 178         tdma_writel(priv, reg, TDMA_CONTROL);
 179
 180         /* Default TPID is ETH_P_8021AD, change to ETH_P_8021Q */
 181         if (wanted & NETIF_F_HW_VLAN_CTAG_TX)
 182                 tdma_writel(priv, ETH_P_8021Q, TDMA_TPID);
 183 }
 184
 185 static int bcm_sysport_set_features(struct net_device *dev,
 186                                     netdev_features_t features)
 187 {
 188         struct bcm_sysport_priv *priv = netdev_priv(dev);
 189
 190         /* Read CRC forward */
 191         if (!priv->is_lite)
 192                 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
 193         else
 194                 priv->crc_fwd = !((gib_readl(priv, GIB_CONTROL) &
 195                                   GIB_FCS_STRIP) >> GIB_FCS_STRIP_SHIFT);
 196
 197         bcm_sysport_set_rx_csum(dev, features);
 198         bcm_sysport_set_tx_csum(dev, features);
 199
 200         return 0;
 201 }
 202
 203 /* Hardware counters must be kept in sync because the order/offset
 204  * is important here (order in structure declaration = order in hardware)
 205  */
 206 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = {
 207         /* general stats */
 208         STAT_NETDEV64(rx_packets),
 209         STAT_NETDEV64(tx_packets),
 210         STAT_NETDEV64(rx_bytes),
 211         STAT_NETDEV64(tx_bytes),
 212         STAT_NETDEV(rx_errors),
 213         STAT_NETDEV(tx_errors),
 214         STAT_NETDEV(rx_dropped),
 215         STAT_NETDEV(tx_dropped),
 216         STAT_NETDEV(multicast),
 217         /* UniMAC RSV counters */
 218         STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
 219         STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
 220         STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
 221         STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
 222         STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
 223         STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
 224         STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
 225         STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
 226         STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
 227         STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
 228         STAT_MIB_RX("rx_pkts", mib.rx.pkt),
 229         STAT_MIB_RX("rx_bytes", mib.rx.bytes),
 230         STAT_MIB_RX("rx_multicast", mib.rx.mca),
 231         STAT_MIB_RX("rx_broadcast", mib.rx.bca),
 232         STAT_MIB_RX("rx_fcs", mib.rx.fcs),
 233         STAT_MIB_RX("rx_control", mib.rx.cf),
 234         STAT_MIB_RX("rx_pause", mib.rx.pf),
 235         STAT_MIB_RX("rx_unknown", mib.rx.uo),
 236         STAT_MIB_RX("rx_align", mib.rx.aln),
 237         STAT_MIB_RX("rx_outrange", mib.rx.flr),
 238         STAT_MIB_RX("rx_code", mib.rx.cde),
 239         STAT_MIB_RX("rx_carrier", mib.rx.fcr),
 240         STAT_MIB_RX("rx_oversize", mib.rx.ovr),
 241         STAT_MIB_RX("rx_jabber", mib.rx.jbr),
 242         STAT_MIB_RX("rx_mtu_err", mib.rx.mtue),
 243         STAT_MIB_RX("rx_good_pkts", mib.rx.pok),
 244         STAT_MIB_RX("rx_unicast", mib.rx.uc),
 245         STAT_MIB_RX("rx_ppp", mib.rx.ppp),
 246         STAT_MIB_RX("rx_crc", mib.rx.rcrc),
 247         /* UniMAC TSV counters */
 248         STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
 249         STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
 250         STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
 251         STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
 252         STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
 253         STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
 254         STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
 255         STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
 256         STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
 257         STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
 258         STAT_MIB_TX("tx_pkts", mib.tx.pkts),
 259         STAT_MIB_TX("tx_multicast", mib.tx.mca),
 260         STAT_MIB_TX("tx_broadcast", mib.tx.bca),
 261         STAT_MIB_TX("tx_pause", mib.tx.pf),
 262         STAT_MIB_TX("tx_control", mib.tx.cf),
 263         STAT_MIB_TX("tx_fcs_err", mib.tx.fcs),
 264         STAT_MIB_TX("tx_oversize", mib.tx.ovr),
 265         STAT_MIB_TX("tx_defer", mib.tx.drf),
 266         STAT_MIB_TX("tx_excess_defer", mib.tx.edf),
 267         STAT_MIB_TX("tx_single_col", mib.tx.scl),
 268         STAT_MIB_TX("tx_multi_col", mib.tx.mcl),
 269         STAT_MIB_TX("tx_late_col", mib.tx.lcl),
 270         STAT_MIB_TX("tx_excess_col", mib.tx.ecl),
 271         STAT_MIB_TX("tx_frags", mib.tx.frg),
 272         STAT_MIB_TX("tx_total_col", mib.tx.ncl),
 273         STAT_MIB_TX("tx_jabber", mib.tx.jbr),
 274         STAT_MIB_TX("tx_bytes", mib.tx.bytes),
 275         STAT_MIB_TX("tx_good_pkts", mib.tx.pok),
 276         STAT_MIB_TX("tx_unicast", mib.tx.uc),
 277         /* UniMAC RUNT counters */
 278         STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
 279         STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
 280         STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
 281         STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
 282         /* RXCHK misc statistics */
 283         STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR),
 284         STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc,
 285                    RXCHK_OTHER_DISC_CNTR),
 286         /* RBUF misc statistics */
 287         STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR),
 288         STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR),
 289         STAT_MIB_SOFT("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
 290         STAT_MIB_SOFT("rx_dma_failed", mib.rx_dma_failed),
 291         STAT_MIB_SOFT("tx_dma_failed", mib.tx_dma_failed),
 292         STAT_MIB_SOFT("tx_realloc_tsb", mib.tx_realloc_tsb),
 293         STAT_MIB_SOFT("tx_realloc_tsb_failed", mib.tx_realloc_tsb_failed),
 294         /* Per TX-queue statistics are dynamically appended */
 295 };
 296
 297 #define BCM_SYSPORT_STATS_LEN   ARRAY_SIZE(bcm_sysport_gstrings_stats)
 298
 299 static void bcm_sysport_get_drvinfo(struct net_device *dev,
 300                                     struct ethtool_drvinfo *info)
 301 {
 302         strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
 303         strlcpy(info->bus_info, "platform", sizeof(info->bus_info));
 304 }
 305
 306 static u32 bcm_sysport_get_msglvl(struct net_device *dev)
 307 {
 308         struct bcm_sysport_priv *priv = netdev_priv(dev);
 309
 310         return priv->msg_enable;
 311 }
 312
 313 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
 314 {
 315         struct bcm_sysport_priv *priv = netdev_priv(dev);
 316
 317         priv->msg_enable = enable;
 318 }
 319
 320 static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type)
 321 {
 322         switch (type) {
 323         case BCM_SYSPORT_STAT_NETDEV:
 324         case BCM_SYSPORT_STAT_NETDEV64:
 325         case BCM_SYSPORT_STAT_RXCHK:
 326         case BCM_SYSPORT_STAT_RBUF:
 327         case BCM_SYSPORT_STAT_SOFT:
 328                 return true;
 329         default:
 330                 return false;
 331         }
 332 }
 333
 334 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set)
 335 {
 336         struct bcm_sysport_priv *priv = netdev_priv(dev);
 337         const struct bcm_sysport_stats *s;
 338         unsigned int i, j;
 339
 340         switch (string_set) {
 341         case ETH_SS_STATS:
 342                 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 343                         s = &bcm_sysport_gstrings_stats[i];
 344                         if (priv->is_lite &&
 345                             !bcm_sysport_lite_stat_valid(s->type))
 346                                 continue;
 347                         j++;
 348                 }
 349                 /* Include per-queue statistics */
 350                 return j + dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
 351         default:
 352                 return -EOPNOTSUPP;
 353         }
 354 }
 355
 356 static void bcm_sysport_get_strings(struct net_device *dev,
 357                                     u32 stringset, u8 *data)
 358 {
 359         struct bcm_sysport_priv *priv = netdev_priv(dev);
 360         const struct bcm_sysport_stats *s;
 361         char buf[128];
 362         int i, j;
 363
 364         switch (stringset) {
 365         case ETH_SS_STATS:
 366                 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 367                         s = &bcm_sysport_gstrings_stats[i];
 368                         if (priv->is_lite &&
 369                             !bcm_sysport_lite_stat_valid(s->type))
 370                                 continue;
 371
 372                         memcpy(data + j * ETH_GSTRING_LEN, s->stat_string,
 373                                ETH_GSTRING_LEN);
 374                         j++;
 375                 }
 376
 377                 for (i = 0; i < dev->num_tx_queues; i++) {
 378                         snprintf(buf, sizeof(buf), "txq%d_packets", i);
 379                         memcpy(data + j * ETH_GSTRING_LEN, buf,
 380                                ETH_GSTRING_LEN);
 381                         j++;
 382
 383                         snprintf(buf, sizeof(buf), "txq%d_bytes", i);
 384                         memcpy(data + j * ETH_GSTRING_LEN, buf,
 385                                ETH_GSTRING_LEN);
 386                         j++;
 387                 }
 388                 break;
 389         default:
 390                 break;
 391         }
 392 }
 393
 394 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
 395 {
 396         int i, j = 0;
 397
 398         for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 399                 const struct bcm_sysport_stats *s;
 400                 u8 offset = 0;
 401                 u32 val = 0;
 402                 char *p;
 403
 404                 s = &bcm_sysport_gstrings_stats[i];
 405                 switch (s->type) {
 406                 case BCM_SYSPORT_STAT_NETDEV:
 407                 case BCM_SYSPORT_STAT_NETDEV64:
 408                 case BCM_SYSPORT_STAT_SOFT:
 409                         continue;
 410                 case BCM_SYSPORT_STAT_MIB_RX:
 411                 case BCM_SYSPORT_STAT_MIB_TX:
 412                 case BCM_SYSPORT_STAT_RUNT:
 413                         if (priv->is_lite)
 414                                 continue;
 415
 416                         if (s->type != BCM_SYSPORT_STAT_MIB_RX)
 417                                 offset = UMAC_MIB_STAT_OFFSET;
 418                         val = umac_readl(priv, UMAC_MIB_START + j + offset);
 419                         break;
 420                 case BCM_SYSPORT_STAT_RXCHK:
 421                         val = rxchk_readl(priv, s->reg_offset);
 422                         if (val == ~0)
 423                                 rxchk_writel(priv, 0, s->reg_offset);
 424                         break;
 425                 case BCM_SYSPORT_STAT_RBUF:
 426                         val = rbuf_readl(priv, s->reg_offset);
 427                         if (val == ~0)
 428                                 rbuf_writel(priv, 0, s->reg_offset);
 429                         break;
 430                 }
 431
 432                 j += s->stat_sizeof;
 433                 p = (char *)priv + s->stat_offset;
 434                 *(u32 *)p = val;
 435         }
 436
 437         netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
 438 }
 439
 440 static void bcm_sysport_update_tx_stats(struct bcm_sysport_priv *priv,
 441                                         u64 *tx_bytes, u64 *tx_packets)
 442 {
 443         struct bcm_sysport_tx_ring *ring;
 444         u64 bytes = 0, packets = 0;
 445         unsigned int start;
 446         unsigned int q;
 447
 448         for (q = 0; q < priv->netdev->num_tx_queues; q++) {
 449                 ring = &priv->tx_rings[q];
 450                 do {
 451                         start = u64_stats_fetch_begin_irq(&priv->syncp);
 452                         bytes = ring->bytes;
 453                         packets = ring->packets;
 454                 } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
 455
 456                 *tx_bytes += bytes;
 457                 *tx_packets += packets;
 458         }
 459 }
 460
 461 static void bcm_sysport_get_stats(struct net_device *dev,
 462                                   struct ethtool_stats *stats, u64 *data)
 463 {
 464         struct bcm_sysport_priv *priv = netdev_priv(dev);
 465         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
 466         struct u64_stats_sync *syncp = &priv->syncp;
 467         struct bcm_sysport_tx_ring *ring;
 468         u64 tx_bytes = 0, tx_packets = 0;
 469         unsigned int start;
 470         int i, j;
 471
 472         if (netif_running(dev)) {
 473                 bcm_sysport_update_mib_counters(priv);
 474                 bcm_sysport_update_tx_stats(priv, &tx_bytes, &tx_packets);
 475                 stats64->tx_bytes = tx_bytes;
 476                 stats64->tx_packets = tx_packets;
 477         }
 478
 479         for (i =  0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 480                 const struct bcm_sysport_stats *s;
 481                 char *p;
 482
 483                 s = &bcm_sysport_gstrings_stats[i];
 484                 if (s->type == BCM_SYSPORT_STAT_NETDEV)
 485                         p = (char *)&dev->stats;
 486                 else if (s->type == BCM_SYSPORT_STAT_NETDEV64)
 487                         p = (char *)stats64;
 488                 else
 489                         p = (char *)priv;
 490
 491                 if (priv->is_lite && !bcm_sysport_lite_stat_valid(s->type))
 492                         continue;
 493                 p += s->stat_offset;
 494
 495                 if (s->stat_sizeof == sizeof(u64) &&
 496                     s->type == BCM_SYSPORT_STAT_NETDEV64) {
 497                         do {
 498                                 start = u64_stats_fetch_begin_irq(syncp);
 499                                 data[i] = *(u64 *)p;
 500                         } while (u64_stats_fetch_retry_irq(syncp, start));
 501                 } else
 502                         data[i] = *(u32 *)p;
 503                 j++;
 504         }
 505
 506         /* For SYSTEMPORT Lite since we have holes in our statistics, j would
 507          * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it
 508          * needs to point to how many total statistics we have minus the
 509          * number of per TX queue statistics
 510          */
 511         j = bcm_sysport_get_sset_count(dev, ETH_SS_STATS) -
 512             dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
 513
 514         for (i = 0; i < dev->num_tx_queues; i++) {
 515                 ring = &priv->tx_rings[i];
 516                 data[j] = ring->packets;
 517                 j++;
 518                 data[j] = ring->bytes;
 519                 j++;
 520         }
 521 }
 522
 523 static void bcm_sysport_get_wol(struct net_device *dev,
 524                                 struct ethtool_wolinfo *wol)
 525 {
 526         struct bcm_sysport_priv *priv = netdev_priv(dev);
 527
 528         wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
 529         wol->wolopts = priv->wolopts;
 530
 531         if (!(priv->wolopts & WAKE_MAGICSECURE))
 532                 return;
 533
 534         memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass));
 535 }
 536
 537 static int bcm_sysport_set_wol(struct net_device *dev,
 538                                struct ethtool_wolinfo *wol)
 539 {
 540         struct bcm_sysport_priv *priv = netdev_priv(dev);
 541         struct device *kdev = &priv->pdev->dev;
 542         u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
 543
 544         if (!device_can_wakeup(kdev))
 545                 return -ENOTSUPP;
 546
 547         if (wol->wolopts & ~supported)
 548                 return -EINVAL;
 549
 550         if (wol->wolopts & WAKE_MAGICSECURE)
 551                 memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass));
 552
 553         /* Flag the device and relevant IRQ as wakeup capable */
 554         if (wol->wolopts) {
 555                 device_set_wakeup_enable(kdev, 1);
 556                 if (priv->wol_irq_disabled)
 557                         enable_irq_wake(priv->wol_irq);
 558                 priv->wol_irq_disabled = 0;
 559         } else {
 560                 device_set_wakeup_enable(kdev, 0);
 561                 /* Avoid unbalanced disable_irq_wake calls */
 562                 if (!priv->wol_irq_disabled)
 563                         disable_irq_wake(priv->wol_irq);
 564                 priv->wol_irq_disabled = 1;
 565         }
 566
 567         priv->wolopts = wol->wolopts;
 568
 569         return 0;
 570 }
 571
 572 static void bcm_sysport_set_rx_coalesce(struct bcm_sysport_priv *priv,
 573                                         u32 usecs, u32 pkts)
 574 {
 575         u32 reg;
 576
 577         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 578         reg &= ~(RDMA_INTR_THRESH_MASK |
 579                  RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT);
 580         reg |= pkts;
 581         reg |= DIV_ROUND_UP(usecs * 1000, 8192) << RDMA_TIMEOUT_SHIFT;
 582         rdma_writel(priv, reg, RDMA_MBDONE_INTR);
 583 }
 584
 585 static void bcm_sysport_set_tx_coalesce(struct bcm_sysport_tx_ring *ring,
 586                                         struct ethtool_coalesce *ec)
 587 {
 588         struct bcm_sysport_priv *priv = ring->priv;
 589         u32 reg;
 590
 591         reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(ring->index));
 592         reg &= ~(RING_INTR_THRESH_MASK |
 593                  RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT);
 594         reg |= ec->tx_max_coalesced_frames;
 595         reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) <<
 596                             RING_TIMEOUT_SHIFT;
 597         tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(ring->index));
 598 }
 599
 600 static int bcm_sysport_get_coalesce(struct net_device *dev,
 601                                     struct ethtool_coalesce *ec)
 602 {
 603         struct bcm_sysport_priv *priv = netdev_priv(dev);
 604         u32 reg;
 605
 606         reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0));
 607
 608         ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000;
 609         ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK;
 610
 611         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 612
 613         ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000;
 614         ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK;
 615         ec->use_adaptive_rx_coalesce = priv->dim.use_dim;
 616
 617         return 0;
 618 }
 619
 620 static int bcm_sysport_set_coalesce(struct net_device *dev,
 621                                     struct ethtool_coalesce *ec)
 622 {
 623         struct bcm_sysport_priv *priv = netdev_priv(dev);
 624         struct dim_cq_moder moder;
 625         u32 usecs, pkts;
 626         unsigned int i;
 627
 628         /* Base system clock is 125Mhz, DMA timeout is this reference clock
 629          * divided by 1024, which yield roughly 8.192 us, our maximum value has
 630          * to fit in the RING_TIMEOUT_MASK (16 bits).
 631          */
 632         if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
 633             ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
 634             ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
 635             ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
 636                 return -EINVAL;
 637
 638         if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
 639             (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0))
 640                 return -EINVAL;
 641
 642         for (i = 0; i < dev->num_tx_queues; i++)
 643                 bcm_sysport_set_tx_coalesce(&priv->tx_rings[i], ec);
 644
 645         priv->rx_coalesce_usecs = ec->rx_coalesce_usecs;
 646         priv->rx_max_coalesced_frames = ec->rx_max_coalesced_frames;
 647         usecs = priv->rx_coalesce_usecs;
 648         pkts = priv->rx_max_coalesced_frames;
 649
 650         if (ec->use_adaptive_rx_coalesce && !priv->dim.use_dim) {
 651                 moder = net_dim_get_def_rx_moderation(priv->dim.dim.mode);
 652                 usecs = moder.usec;
 653                 pkts = moder.pkts;
 654         }
 655
 656         priv->dim.use_dim = ec->use_adaptive_rx_coalesce;
 657
 658         /* Apply desired coalescing parameters */
 659         bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
 660
 661         return 0;
 662 }
 663
 664 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
 665 {
 666         dev_consume_skb_any(cb->skb);
 667         cb->skb = NULL;
 668         dma_unmap_addr_set(cb, dma_addr, 0);
 669 }
 670
 671 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
 672                                              struct bcm_sysport_cb *cb)
 673 {
 674         struct device *kdev = &priv->pdev->dev;
 675         struct net_device *ndev = priv->netdev;
 676         struct sk_buff *skb, *rx_skb;
 677         dma_addr_t mapping;
 678
 679         /* Allocate a new SKB for a new packet */
 680         skb = __netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH,
 681                                  GFP_ATOMIC | __GFP_NOWARN);
 682         if (!skb) {
 683                 priv->mib.alloc_rx_buff_failed++;
 684                 netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
 685                 return NULL;
 686         }
 687
 688         mapping = dma_map_single(kdev, skb->data,
 689                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 690         if (dma_mapping_error(kdev, mapping)) {
 691                 priv->mib.rx_dma_failed++;
 692                 dev_kfree_skb_any(skb);
 693                 netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
 694                 return NULL;
 695         }
 696
 697         /* Grab the current SKB on the ring */
 698         rx_skb = cb->skb;
 699         if (likely(rx_skb))
 700                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 701                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 702
 703         /* Put the new SKB on the ring */
 704         cb->skb = skb;
 705         dma_unmap_addr_set(cb, dma_addr, mapping);
 706         dma_desc_set_addr(priv, cb->bd_addr, mapping);
 707
 708         netif_dbg(priv, rx_status, ndev, "RX refill\n");
 709
 710         /* Return the current SKB to the caller */
 711         return rx_skb;
 712 }
 713
 714 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
 715 {
 716         struct bcm_sysport_cb *cb;
 717         struct sk_buff *skb;
 718         unsigned int i;
 719
 720         for (i = 0; i < priv->num_rx_bds; i++) {
 721                 cb = &priv->rx_cbs[i];
 722                 skb = bcm_sysport_rx_refill(priv, cb);
 723                 dev_kfree_skb(skb);
 724                 if (!cb->skb)
 725                         return -ENOMEM;
 726         }
 727
 728         return 0;
 729 }
 730
 731 /* Poll the hardware for up to budget packets to process */
 732 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
 733                                         unsigned int budget)
 734 {
 735         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
 736         struct net_device *ndev = priv->netdev;
 737         unsigned int processed = 0, to_process;
 738         unsigned int processed_bytes = 0;
 739         struct bcm_sysport_cb *cb;
 740         struct sk_buff *skb;
 741         unsigned int p_index;
 742         u16 len, status;
 743         struct bcm_rsb *rsb;
 744
 745         /* Clear status before servicing to reduce spurious interrupts */
 746         intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR);
 747
 748         /* Determine how much we should process since last call, SYSTEMPORT Lite
 749          * groups the producer and consumer indexes into the same 32-bit
 750          * which we access using RDMA_CONS_INDEX
 751          */
 752         if (!priv->is_lite)
 753                 p_index = rdma_readl(priv, RDMA_PROD_INDEX);
 754         else
 755                 p_index = rdma_readl(priv, RDMA_CONS_INDEX);
 756         p_index &= RDMA_PROD_INDEX_MASK;
 757
 758         to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK;
 759
 760         netif_dbg(priv, rx_status, ndev,
 761                   "p_index=%d rx_c_index=%d to_process=%d\n",
 762                   p_index, priv->rx_c_index, to_process);
 763
 764         while ((processed < to_process) && (processed < budget)) {
 765                 cb = &priv->rx_cbs[priv->rx_read_ptr];
 766                 skb = bcm_sysport_rx_refill(priv, cb);
 767
 768
 769                 /* We do not have a backing SKB, so we do not a corresponding
 770                  * DMA mapping for this incoming packet since
 771                  * bcm_sysport_rx_refill always either has both skb and mapping
 772                  * or none.
 773                  */
 774                 if (unlikely(!skb)) {
 775                         netif_err(priv, rx_err, ndev, "out of memory!\n");
 776                         ndev->stats.rx_dropped++;
 777                         ndev->stats.rx_errors++;
 778                         goto next;
 779                 }
 780
 781                 /* Extract the Receive Status Block prepended */
 782                 rsb = (struct bcm_rsb *)skb->data;
 783                 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
 784                 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
 785                           DESC_STATUS_MASK;
 786
 787                 netif_dbg(priv, rx_status, ndev,
 788                           "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
 789                           p_index, priv->rx_c_index, priv->rx_read_ptr,
 790                           len, status);
 791
 792                 if (unlikely(len > RX_BUF_LENGTH)) {
 793                         netif_err(priv, rx_status, ndev, "oversized packet\n");
 794                         ndev->stats.rx_length_errors++;
 795                         ndev->stats.rx_errors++;
 796                         dev_kfree_skb_any(skb);
 797                         goto next;
 798                 }
 799
 800                 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
 801                         netif_err(priv, rx_status, ndev, "fragmented packet!\n");
 802                         ndev->stats.rx_dropped++;
 803                         ndev->stats.rx_errors++;
 804                         dev_kfree_skb_any(skb);
 805                         goto next;
 806                 }
 807
 808                 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
 809                         netif_err(priv, rx_err, ndev, "error packet\n");
 810                         if (status & RX_STATUS_OVFLOW)
 811                                 ndev->stats.rx_over_errors++;
 812                         ndev->stats.rx_dropped++;
 813                         ndev->stats.rx_errors++;
 814                         dev_kfree_skb_any(skb);
 815                         goto next;
 816                 }
 817
 818                 skb_put(skb, len);
 819
 820                 /* Hardware validated our checksum */
 821                 if (likely(status & DESC_L4_CSUM))
 822                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 823
 824                 /* Hardware pre-pends packets with 2bytes before Ethernet
 825                  * header plus we have the Receive Status Block, strip off all
 826                  * of this from the SKB.
 827                  */
 828                 skb_pull(skb, sizeof(*rsb) + 2);
 829                 len -= (sizeof(*rsb) + 2);
 830                 processed_bytes += len;
 831
 832                 /* UniMAC may forward CRC */
 833                 if (priv->crc_fwd) {
 834                         skb_trim(skb, len - ETH_FCS_LEN);
 835                         len -= ETH_FCS_LEN;
 836                 }
 837
 838                 skb->protocol = eth_type_trans(skb, ndev);
 839                 ndev->stats.rx_packets++;
 840                 ndev->stats.rx_bytes += len;
 841                 u64_stats_update_begin(&priv->syncp);
 842                 stats64->rx_packets++;
 843                 stats64->rx_bytes += len;
 844                 u64_stats_update_end(&priv->syncp);
 845
 846                 napi_gro_receive(&priv->napi, skb);
 847 next:
 848                 processed++;
 849                 priv->rx_read_ptr++;
 850
 851                 if (priv->rx_read_ptr == priv->num_rx_bds)
 852                         priv->rx_read_ptr = 0;
 853         }
 854
 855         priv->dim.packets = processed;
 856         priv->dim.bytes = processed_bytes;
 857
 858         return processed;
 859 }
 860
 861 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring,
 862                                        struct bcm_sysport_cb *cb,
 863                                        unsigned int *bytes_compl,
 864                                        unsigned int *pkts_compl)
 865 {
 866         struct bcm_sysport_priv *priv = ring->priv;
 867         struct device *kdev = &priv->pdev->dev;
 868
 869         if (cb->skb) {
 870                 *bytes_compl += cb->skb->len;
 871                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 872                                  dma_unmap_len(cb, dma_len),
 873                                  DMA_TO_DEVICE);
 874                 (*pkts_compl)++;
 875                 bcm_sysport_free_cb(cb);
 876         /* SKB fragment */
 877         } else if (dma_unmap_addr(cb, dma_addr)) {
 878                 *bytes_compl += dma_unmap_len(cb, dma_len);
 879                 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
 880                                dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
 881                 dma_unmap_addr_set(cb, dma_addr, 0);
 882         }
 883 }
 884
 885 /* Reclaim queued SKBs for transmission completion, lockless version */
 886 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 887                                              struct bcm_sysport_tx_ring *ring)
 888 {
 889         unsigned int pkts_compl = 0, bytes_compl = 0;
 890         struct net_device *ndev = priv->netdev;
 891         unsigned int txbds_processed = 0;
 892         struct bcm_sysport_cb *cb;
 893         unsigned int txbds_ready;
 894         unsigned int c_index;
 895         u32 hw_ind;
 896
 897         /* Clear status before servicing to reduce spurious interrupts */
 898         if (!ring->priv->is_lite)
 899                 intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR);
 900         else
 901                 intrl2_0_writel(ring->priv, BIT(ring->index +
 902                                 INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR);
 903
 904         /* Compute how many descriptors have been processed since last call */
 905         hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
 906         c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
 907         txbds_ready = (c_index - ring->c_index) & RING_CONS_INDEX_MASK;
 908
 909         netif_dbg(priv, tx_done, ndev,
 910                   "ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
 911                   ring->index, ring->c_index, c_index, txbds_ready);
 912
 913         while (txbds_processed < txbds_ready) {
 914                 cb = &ring->cbs[ring->clean_index];
 915                 bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl);
 916
 917                 ring->desc_count++;
 918                 txbds_processed++;
 919
 920                 if (likely(ring->clean_index < ring->size - 1))
 921                         ring->clean_index++;
 922                 else
 923                         ring->clean_index = 0;
 924         }
 925
 926         u64_stats_update_begin(&priv->syncp);
 927         ring->packets += pkts_compl;
 928         ring->bytes += bytes_compl;
 929         u64_stats_update_end(&priv->syncp);
 930
 931         ring->c_index = c_index;
 932
 933         netif_dbg(priv, tx_done, ndev,
 934                   "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
 935                   ring->index, ring->c_index, pkts_compl, bytes_compl);
 936
 937         return pkts_compl;
 938 }
 939
 940 /* Locked version of the per-ring TX reclaim routine */
 941 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 942                                            struct bcm_sysport_tx_ring *ring)
 943 {
 944         struct netdev_queue *txq;
 945         unsigned int released;
 946         unsigned long flags;
 947
 948         txq = netdev_get_tx_queue(priv->netdev, ring->index);
 949
 950         spin_lock_irqsave(&ring->lock, flags);
 951         released = __bcm_sysport_tx_reclaim(priv, ring);
 952         if (released)
 953                 netif_tx_wake_queue(txq);
 954
 955         spin_unlock_irqrestore(&ring->lock, flags);
 956
 957         return released;
 958 }
 959
 960 /* Locked version of the per-ring TX reclaim, but does not wake the queue */
 961 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv,
 962                                  struct bcm_sysport_tx_ring *ring)
 963 {
 964         unsigned long flags;
 965
 966         spin_lock_irqsave(&ring->lock, flags);
 967         __bcm_sysport_tx_reclaim(priv, ring);
 968         spin_unlock_irqrestore(&ring->lock, flags);
 969 }
 970
 971 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
 972 {
 973         struct bcm_sysport_tx_ring *ring =
 974                 container_of(napi, struct bcm_sysport_tx_ring, napi);
 975         unsigned int work_done = 0;
 976
 977         work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
 978
 979         if (work_done == 0) {
 980                 napi_complete(napi);
 981                 /* re-enable TX interrupt */
 982                 if (!ring->priv->is_lite)
 983                         intrl2_1_mask_clear(ring->priv, BIT(ring->index));
 984                 else
 985                         intrl2_0_mask_clear(ring->priv, BIT(ring->index +
 986                                             INTRL2_0_TDMA_MBDONE_SHIFT));
 987
 988                 return 0;
 989         }
 990
 991         return budget;
 992 }
 993
 994 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
 995 {
 996         unsigned int q;
 997
 998         for (q = 0; q < priv->netdev->num_tx_queues; q++)
 999                 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
1000 }
1001
1002 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
1003 {
1004         struct bcm_sysport_priv *priv =
1005                 container_of(napi, struct bcm_sysport_priv, napi);
1006         struct dim_sample dim_sample = {};
1007         unsigned int work_done = 0;
1008
1009         work_done = bcm_sysport_desc_rx(priv, budget);
1010
1011         priv->rx_c_index += work_done;
1012         priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
1013
1014         /* SYSTEMPORT Lite groups the producer/consumer index, producer is
1015          * maintained by HW, but writes to it will be ignore while RDMA
1016          * is active
1017          */
1018         if (!priv->is_lite)
1019                 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
1020         else
1021                 rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX);
1022
1023         if (work_done < budget) {
1024                 napi_complete_done(napi, work_done);
1025                 /* re-enable RX interrupts */
1026                 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
1027         }
1028
1029         if (priv->dim.use_dim) {
1030                 dim_update_sample(priv->dim.event_ctr, priv->dim.packets,
1031                                   priv->dim.bytes, &dim_sample);
1032                 net_dim(&priv->dim.dim, dim_sample);
1033         }
1034
1035         return work_done;
1036 }
1037
1038 static void mpd_enable_set(struct bcm_sysport_priv *priv, bool enable)
1039 {
1040         u32 reg, bit;
1041
1042         reg = umac_readl(priv, UMAC_MPD_CTRL);
1043         if (enable)
1044                 reg |= MPD_EN;
1045         else
1046                 reg &= ~MPD_EN;
1047         umac_writel(priv, reg, UMAC_MPD_CTRL);
1048
1049         if (priv->is_lite)
1050                 bit = RBUF_ACPI_EN_LITE;
1051         else
1052                 bit = RBUF_ACPI_EN;
1053
1054         reg = rbuf_readl(priv, RBUF_CONTROL);
1055         if (enable)
1056                 reg |= bit;
1057         else
1058                 reg &= ~bit;
1059         rbuf_writel(priv, reg, RBUF_CONTROL);
1060 }
1061
1062 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
1063 {
1064         unsigned int index;
1065         u32 reg;
1066
1067         /* Disable RXCHK, active filters and Broadcom tag matching */
1068         reg = rxchk_readl(priv, RXCHK_CONTROL);
1069         reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
1070                  RXCHK_BRCM_TAG_MATCH_SHIFT | RXCHK_EN | RXCHK_BRCM_TAG_EN);
1071         rxchk_writel(priv, reg, RXCHK_CONTROL);
1072
1073         /* Make sure we restore correct CID index in case HW lost
1074          * its context during deep idle state
1075          */
1076         for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
1077                 rxchk_writel(priv, priv->filters_loc[index] <<
1078                              RXCHK_BRCM_TAG_CID_SHIFT, RXCHK_BRCM_TAG(index));
1079                 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
1080         }
1081
1082         /* Clear the MagicPacket detection logic */
1083         mpd_enable_set(priv, false);
1084
1085         reg = intrl2_0_readl(priv, INTRL2_CPU_STATUS);
1086         if (reg & INTRL2_0_MPD)
1087                 netdev_info(priv->netdev, "Wake-on-LAN (MPD) interrupt!\n");
1088
1089         if (reg & INTRL2_0_BRCM_MATCH_TAG) {
1090                 reg = rxchk_readl(priv, RXCHK_BRCM_TAG_MATCH_STATUS) &
1091                                   RXCHK_BRCM_TAG_MATCH_MASK;
1092                 netdev_info(priv->netdev,
1093                             "Wake-on-LAN (filters 0x%02x) interrupt!\n", reg);
1094         }
1095
1096         netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
1097 }
1098
1099 static void bcm_sysport_dim_work(struct work_struct *work)
1100 {
1101         struct dim *dim = container_of(work, struct dim, work);
1102         struct bcm_sysport_net_dim *ndim =
1103                         container_of(dim, struct bcm_sysport_net_dim, dim);
1104         struct bcm_sysport_priv *priv =
1105                         container_of(ndim, struct bcm_sysport_priv, dim);
1106         struct dim_cq_moder cur_profile = net_dim_get_rx_moderation(dim->mode,
1107                                                                     dim->profile_ix);
1108
1109         bcm_sysport_set_rx_coalesce(priv, cur_profile.usec, cur_profile.pkts);
1110         dim->state = DIM_START_MEASURE;
1111 }
1112
1113 /* RX and misc interrupt routine */
1114 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
1115 {
1116         struct net_device *dev = dev_id;
1117         struct bcm_sysport_priv *priv = netdev_priv(dev);
1118         struct bcm_sysport_tx_ring *txr;
1119         unsigned int ring, ring_bit;
1120
1121         priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
1122                           ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
1123         intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
1124
1125         if (unlikely(priv->irq0_stat == 0)) {
1126                 netdev_warn(priv->netdev, "spurious RX interrupt\n");
1127                 return IRQ_NONE;
1128         }
1129
1130         if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
1131                 priv->dim.event_ctr++;
1132                 if (likely(napi_schedule_prep(&priv->napi))) {
1133                         /* disable RX interrupts */
1134                         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
1135                         __napi_schedule_irqoff(&priv->napi);
1136                 }
1137         }
1138
1139         /* TX ring is full, perform a full reclaim since we do not know
1140          * which one would trigger this interrupt
1141          */
1142         if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
1143                 bcm_sysport_tx_reclaim_all(priv);
1144
1145         if (!priv->is_lite)
1146                 goto out;
1147
1148         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1149                 ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT);
1150                 if (!(priv->irq0_stat & ring_bit))
1151                         continue;
1152
1153                 txr = &priv->tx_rings[ring];
1154
1155                 if (likely(napi_schedule_prep(&txr->napi))) {
1156                         intrl2_0_mask_set(priv, ring_bit);
1157                         __napi_schedule(&txr->napi);
1158                 }
1159         }
1160 out:
1161         return IRQ_HANDLED;
1162 }
1163
1164 /* TX interrupt service routine */
1165 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
1166 {
1167         struct net_device *dev = dev_id;
1168         struct bcm_sysport_priv *priv = netdev_priv(dev);
1169         struct bcm_sysport_tx_ring *txr;
1170         unsigned int ring;
1171
1172         priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
1173                                 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
1174         intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1175
1176         if (unlikely(priv->irq1_stat == 0)) {
1177                 netdev_warn(priv->netdev, "spurious TX interrupt\n");
1178                 return IRQ_NONE;
1179         }
1180
1181         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1182                 if (!(priv->irq1_stat & BIT(ring)))
1183                         continue;
1184
1185                 txr = &priv->tx_rings[ring];
1186
1187                 if (likely(napi_schedule_prep(&txr->napi))) {
1188                         intrl2_1_mask_set(priv, BIT(ring));
1189                         __napi_schedule_irqoff(&txr->napi);
1190                 }
1191         }
1192
1193         return IRQ_HANDLED;
1194 }
1195
1196 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
1197 {
1198         struct bcm_sysport_priv *priv = dev_id;
1199
1200         pm_wakeup_event(&priv->pdev->dev, 0);
1201
1202         return IRQ_HANDLED;
1203 }
1204
1205 #ifdef CONFIG_NET_POLL_CONTROLLER
1206 static void bcm_sysport_poll_controller(struct net_device *dev)
1207 {
1208         struct bcm_sysport_priv *priv = netdev_priv(dev);
1209
1210         disable_irq(priv->irq0);
1211         bcm_sysport_rx_isr(priv->irq0, priv);
1212         enable_irq(priv->irq0);
1213
1214         if (!priv->is_lite) {
1215                 disable_irq(priv->irq1);
1216                 bcm_sysport_tx_isr(priv->irq1, priv);
1217                 enable_irq(priv->irq1);
1218         }
1219 }
1220 #endif
1221
1222 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
1223                                               struct net_device *dev)
1224 {
1225         struct bcm_sysport_priv *priv = netdev_priv(dev);
1226         struct sk_buff *nskb;
1227         struct bcm_tsb *tsb;
1228         u32 csum_info;
1229         u8 ip_proto;
1230         u16 csum_start;
1231         __be16 ip_ver;
1232
1233         /* Re-allocate SKB if needed */
1234         if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
1235                 nskb = skb_realloc_headroom(skb, sizeof(*tsb));
1236                 if (!nskb) {
1237                         dev_kfree_skb_any(skb);
1238                         priv->mib.tx_realloc_tsb_failed++;
1239                         dev->stats.tx_errors++;
1240                         dev->stats.tx_dropped++;
1241                         return NULL;
1242                 }
1243                 dev_consume_skb_any(skb);
1244                 skb = nskb;
1245                 priv->mib.tx_realloc_tsb++;
1246         }
1247
1248         tsb = skb_push(skb, sizeof(*tsb));
1249         /* Zero-out TSB by default */
1250         memset(tsb, 0, sizeof(*tsb));
1251
1252         if (skb_vlan_tag_present(skb)) {
1253                 tsb->pcp_dei_vid = skb_vlan_tag_get_prio(skb) & PCP_DEI_MASK;
1254                 tsb->pcp_dei_vid |= (u32)skb_vlan_tag_get_id(skb) << VID_SHIFT;
1255         }
1256
1257         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1258                 ip_ver = skb->protocol;
1259                 switch (ip_ver) {
1260                 case htons(ETH_P_IP):
1261                         ip_proto = ip_hdr(skb)->protocol;
1262                         break;
1263                 case htons(ETH_P_IPV6):
1264                         ip_proto = ipv6_hdr(skb)->nexthdr;
1265                         break;
1266                 default:
1267                         return skb;
1268                 }
1269
1270                 /* Get the checksum offset and the L4 (transport) offset */
1271                 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
1272                 /* Account for the HW inserted VLAN tag */
1273                 if (skb_vlan_tag_present(skb))
1274                         csum_start += VLAN_HLEN;
1275                 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
1276                 csum_info |= (csum_start << L4_PTR_SHIFT);
1277
1278                 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1279                         csum_info |= L4_LENGTH_VALID;
1280                         if (ip_proto == IPPROTO_UDP &&
1281                             ip_ver == htons(ETH_P_IP))
1282                                 csum_info |= L4_UDP;
1283                 } else {
1284                         csum_info = 0;
1285                 }
1286
1287                 tsb->l4_ptr_dest_map = csum_info;
1288         }
1289
1290         return skb;
1291 }
1292
1293 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
1294                                     struct net_device *dev)
1295 {
1296         struct bcm_sysport_priv *priv = netdev_priv(dev);
1297         struct device *kdev = &priv->pdev->dev;
1298         struct bcm_sysport_tx_ring *ring;
1299         struct bcm_sysport_cb *cb;
1300         struct netdev_queue *txq;
1301         u32 len_status, addr_lo;
1302         unsigned int skb_len;
1303         unsigned long flags;
1304         dma_addr_t mapping;
1305         u16 queue;
1306         int ret;
1307
1308         queue = skb_get_queue_mapping(skb);
1309         txq = netdev_get_tx_queue(dev, queue);
1310         ring = &priv->tx_rings[queue];
1311
1312         /* lock against tx reclaim in BH context and TX ring full interrupt */
1313         spin_lock_irqsave(&ring->lock, flags);
1314         if (unlikely(ring->desc_count == 0)) {
1315                 netif_tx_stop_queue(txq);
1316                 netdev_err(dev, "queue %d awake and ring full!\n", queue);
1317                 ret = NETDEV_TX_BUSY;
1318                 goto out;
1319         }
1320
1321         /* Insert TSB and checksum infos */
1322         if (priv->tsb_en) {
1323                 skb = bcm_sysport_insert_tsb(skb, dev);
1324                 if (!skb) {
1325                         ret = NETDEV_TX_OK;
1326                         goto out;
1327                 }
1328         }
1329
1330         skb_len = skb->len;
1331
1332         mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1333         if (dma_mapping_error(kdev, mapping)) {
1334                 priv->mib.tx_dma_failed++;
1335                 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
1336                           skb->data, skb_len);
1337                 ret = NETDEV_TX_OK;
1338                 goto out;
1339         }
1340
1341         /* Remember the SKB for future freeing */
1342         cb = &ring->cbs[ring->curr_desc];
1343         cb->skb = skb;
1344         dma_unmap_addr_set(cb, dma_addr, mapping);
1345         dma_unmap_len_set(cb, dma_len, skb_len);
1346
1347         addr_lo = lower_32_bits(mapping);
1348         len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
1349         len_status |= (skb_len << DESC_LEN_SHIFT);
1350         len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
1351                        DESC_STATUS_SHIFT;
1352         if (skb->ip_summed == CHECKSUM_PARTIAL)
1353                 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1354         if (skb_vlan_tag_present(skb))
1355                 len_status |= (TX_STATUS_VLAN_VID_TSB << DESC_STATUS_SHIFT);
1356
1357         ring->curr_desc++;
1358         if (ring->curr_desc == ring->size)
1359                 ring->curr_desc = 0;
1360         ring->desc_count--;
1361
1362         /* Ports are latched, so write upper address first */
1363         tdma_writel(priv, len_status, TDMA_WRITE_PORT_HI(ring->index));
1364         tdma_writel(priv, addr_lo, TDMA_WRITE_PORT_LO(ring->index));
1365
1366         /* Check ring space and update SW control flow */
1367         if (ring->desc_count == 0)
1368                 netif_tx_stop_queue(txq);
1369
1370         netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
1371                   ring->index, ring->desc_count, ring->curr_desc);
1372
1373         ret = NETDEV_TX_OK;
1374 out:
1375         spin_unlock_irqrestore(&ring->lock, flags);
1376         return ret;
1377 }
1378
1379 static void bcm_sysport_tx_timeout(struct net_device *dev, unsigned int txqueue)
1380 {
1381         netdev_warn(dev, "transmit timeout!\n");
1382
1383         netif_trans_update(dev);
1384         dev->stats.tx_errors++;
1385
1386         netif_tx_wake_all_queues(dev);
1387 }
1388
1389 /* phylib adjust link callback */
1390 static void bcm_sysport_adj_link(struct net_device *dev)
1391 {
1392         struct bcm_sysport_priv *priv = netdev_priv(dev);
1393         struct phy_device *phydev = dev->phydev;
1394         unsigned int changed = 0;
1395         u32 cmd_bits = 0, reg;
1396
1397         if (priv->old_link != phydev->link) {
1398                 changed = 1;
1399                 priv->old_link = phydev->link;
1400         }
1401
1402         if (priv->old_duplex != phydev->duplex) {
1403                 changed = 1;
1404                 priv->old_duplex = phydev->duplex;
1405         }
1406
1407         if (priv->is_lite)
1408                 goto out;
1409
1410         switch (phydev->speed) {
1411         case SPEED_2500:
1412                 cmd_bits = CMD_SPEED_2500;
1413                 break;
1414         case SPEED_1000:
1415                 cmd_bits = CMD_SPEED_1000;
1416                 break;
1417         case SPEED_100:
1418                 cmd_bits = CMD_SPEED_100;
1419                 break;
1420         case SPEED_10:
1421                 cmd_bits = CMD_SPEED_10;
1422                 break;
1423         default:
1424                 break;
1425         }
1426         cmd_bits <<= CMD_SPEED_SHIFT;
1427
1428         if (phydev->duplex == DUPLEX_HALF)
1429                 cmd_bits |= CMD_HD_EN;
1430
1431         if (priv->old_pause != phydev->pause) {
1432                 changed = 1;
1433                 priv->old_pause = phydev->pause;
1434         }
1435
1436         if (!phydev->pause)
1437                 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1438
1439         if (!changed)
1440                 return;
1441
1442         if (phydev->link) {
1443                 reg = umac_readl(priv, UMAC_CMD);
1444                 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
1445                         CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1446                         CMD_TX_PAUSE_IGNORE);
1447                 reg |= cmd_bits;
1448                 umac_writel(priv, reg, UMAC_CMD);
1449         }
1450 out:
1451         if (changed)
1452                 phy_print_status(phydev);
1453 }
1454
1455 static void bcm_sysport_init_dim(struct bcm_sysport_priv *priv,
1456                                  void (*cb)(struct work_struct *work))
1457 {
1458         struct bcm_sysport_net_dim *dim = &priv->dim;
1459
1460         INIT_WORK(&dim->dim.work, cb);
1461         dim->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1462         dim->event_ctr = 0;
1463         dim->packets = 0;
1464         dim->bytes = 0;
1465 }
1466
1467 static void bcm_sysport_init_rx_coalesce(struct bcm_sysport_priv *priv)
1468 {
1469         struct bcm_sysport_net_dim *dim = &priv->dim;
1470         struct dim_cq_moder moder;
1471         u32 usecs, pkts;
1472
1473         usecs = priv->rx_coalesce_usecs;
1474         pkts = priv->rx_max_coalesced_frames;
1475
1476         /* If DIM was enabled, re-apply default parameters */
1477         if (dim->use_dim) {
1478                 moder = net_dim_get_def_rx_moderation(dim->dim.mode);
1479                 usecs = moder.usec;
1480                 pkts = moder.pkts;
1481         }
1482
1483         bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
1484 }
1485
1486 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1487                                     unsigned int index)
1488 {
1489         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1490         size_t size;
1491         u32 reg;
1492
1493         /* Simple descriptors partitioning for now */
1494         size = 256;
1495
1496         ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1497         if (!ring->cbs) {
1498                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1499                 return -ENOMEM;
1500         }
1501
1502         /* Initialize SW view of the ring */
1503         spin_lock_init(&ring->lock);
1504         ring->priv = priv;
1505         netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64);
1506         ring->index = index;
1507         ring->size = size;
1508         ring->clean_index = 0;
1509         ring->alloc_size = ring->size;
1510         ring->desc_count = ring->size;
1511         ring->curr_desc = 0;
1512
1513         /* Initialize HW ring */
1514         tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1515         tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1516         tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1517         tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1518
1519         /* Configure QID and port mapping */
1520         reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index));
1521         reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT);
1522         if (ring->inspect) {
1523                 reg |= ring->switch_queue & RING_QID_MASK;
1524                 reg |= ring->switch_port << RING_PORT_ID_SHIFT;
1525         } else {
1526                 reg |= RING_IGNORE_STATUS;
1527         }
1528         tdma_writel(priv, reg, TDMA_DESC_RING_MAPPING(index));
1529         reg = 0;
1530         /* Adjust the packet size calculations if SYSTEMPORT is responsible
1531          * for HW insertion of VLAN tags
1532          */
1533         if (priv->netdev->features & NETIF_F_HW_VLAN_CTAG_TX)
1534                 reg = VLAN_HLEN << RING_PKT_SIZE_ADJ_SHIFT;
1535         tdma_writel(priv, reg, TDMA_DESC_RING_PCP_DEI_VID(index));
1536
1537         /* Enable ACB algorithm 2 */
1538         reg = tdma_readl(priv, TDMA_CONTROL);
1539         reg |= tdma_control_bit(priv, ACB_ALGO);
1540         tdma_writel(priv, reg, TDMA_CONTROL);
1541
1542         /* Do not use tdma_control_bit() here because TSB_SWAP1 collides
1543          * with the original definition of ACB_ALGO
1544          */
1545         reg = tdma_readl(priv, TDMA_CONTROL);
1546         if (priv->is_lite)
1547                 reg &= ~BIT(TSB_SWAP1);
1548         /* Set a correct TSB format based on host endian */
1549         if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1550                 reg |= tdma_control_bit(priv, TSB_SWAP0);
1551         else
1552                 reg &= ~tdma_control_bit(priv, TSB_SWAP0);
1553         tdma_writel(priv, reg, TDMA_CONTROL);
1554
1555         /* Program the number of descriptors as MAX_THRESHOLD and half of
1556          * its size for the hysteresis trigger
1557          */
1558         tdma_writel(priv, ring->size |
1559                         1 << RING_HYST_THRESH_SHIFT,
1560                         TDMA_DESC_RING_MAX_HYST(index));
1561
1562         /* Enable the ring queue in the arbiter */
1563         reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1564         reg |= (1 << index);
1565         tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1566
1567         napi_enable(&ring->napi);
1568
1569         netif_dbg(priv, hw, priv->netdev,
1570                   "TDMA cfg, size=%d, switch q=%d,port=%d\n",
1571                   ring->size, ring->switch_queue,
1572                   ring->switch_port);
1573
1574         return 0;
1575 }
1576
1577 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1578                                      unsigned int index)
1579 {
1580         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1581         u32 reg;
1582
1583         /* Caller should stop the TDMA engine */
1584         reg = tdma_readl(priv, TDMA_STATUS);
1585         if (!(reg & TDMA_DISABLED))
1586                 netdev_warn(priv->netdev, "TDMA not stopped!\n");
1587
1588         /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1589          * fail, so by checking this pointer we know whether the TX ring was
1590          * fully initialized or not.
1591          */
1592         if (!ring->cbs)
1593                 return;
1594
1595         napi_disable(&ring->napi);
1596         netif_napi_del(&ring->napi);
1597
1598         bcm_sysport_tx_clean(priv, ring);
1599
1600         kfree(ring->cbs);
1601         ring->cbs = NULL;
1602         ring->size = 0;
1603         ring->alloc_size = 0;
1604
1605         netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1606 }
1607
1608 /* RDMA helper */
1609 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1610                                   unsigned int enable)
1611 {
1612         unsigned int timeout = 1000;
1613         u32 reg;
1614
1615         reg = rdma_readl(priv, RDMA_CONTROL);
1616         if (enable)
1617                 reg |= RDMA_EN;
1618         else
1619                 reg &= ~RDMA_EN;
1620         rdma_writel(priv, reg, RDMA_CONTROL);
1621
1622         /* Poll for RMDA disabling completion */
1623         do {
1624                 reg = rdma_readl(priv, RDMA_STATUS);
1625                 if (!!(reg & RDMA_DISABLED) == !enable)
1626                         return 0;
1627                 usleep_range(1000, 2000);
1628         } while (timeout-- > 0);
1629
1630         netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1631
1632         return -ETIMEDOUT;
1633 }
1634
1635 /* TDMA helper */
1636 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1637                                   unsigned int enable)
1638 {
1639         unsigned int timeout = 1000;
1640         u32 reg;
1641
1642         reg = tdma_readl(priv, TDMA_CONTROL);
1643         if (enable)
1644                 reg |= tdma_control_bit(priv, TDMA_EN);
1645         else
1646                 reg &= ~tdma_control_bit(priv, TDMA_EN);
1647         tdma_writel(priv, reg, TDMA_CONTROL);
1648
1649         /* Poll for TMDA disabling completion */
1650         do {
1651                 reg = tdma_readl(priv, TDMA_STATUS);
1652                 if (!!(reg & TDMA_DISABLED) == !enable)
1653                         return 0;
1654
1655                 usleep_range(1000, 2000);
1656         } while (timeout-- > 0);
1657
1658         netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1659
1660         return -ETIMEDOUT;
1661 }
1662
1663 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1664 {
1665         struct bcm_sysport_cb *cb;
1666         u32 reg;
1667         int ret;
1668         int i;
1669
1670         /* Initialize SW view of the RX ring */
1671         priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC;
1672         priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1673         priv->rx_c_index = 0;
1674         priv->rx_read_ptr = 0;
1675         priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1676                                 GFP_KERNEL);
1677         if (!priv->rx_cbs) {
1678                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1679                 return -ENOMEM;
1680         }
1681
1682         for (i = 0; i < priv->num_rx_bds; i++) {
1683                 cb = priv->rx_cbs + i;
1684                 cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1685         }
1686
1687         ret = bcm_sysport_alloc_rx_bufs(priv);
1688         if (ret) {
1689                 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1690                 return ret;
1691         }
1692
1693         /* Initialize HW, ensure RDMA is disabled */
1694         reg = rdma_readl(priv, RDMA_STATUS);
1695         if (!(reg & RDMA_DISABLED))
1696                 rdma_enable_set(priv, 0);
1697
1698         rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1699         rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1700         rdma_writel(priv, 0, RDMA_PROD_INDEX);
1701         rdma_writel(priv, 0, RDMA_CONS_INDEX);
1702         rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1703                           RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1704         /* Operate the queue in ring mode */
1705         rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1706         rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1707         rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1708         rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO);
1709
1710         netif_dbg(priv, hw, priv->netdev,
1711                   "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1712                   priv->num_rx_bds, priv->rx_bds);
1713
1714         return 0;
1715 }
1716
1717 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1718 {
1719         struct bcm_sysport_cb *cb;
1720         unsigned int i;
1721         u32 reg;
1722
1723         /* Caller should ensure RDMA is disabled */
1724         reg = rdma_readl(priv, RDMA_STATUS);
1725         if (!(reg & RDMA_DISABLED))
1726                 netdev_warn(priv->netdev, "RDMA not stopped!\n");
1727
1728         for (i = 0; i < priv->num_rx_bds; i++) {
1729                 cb = &priv->rx_cbs[i];
1730                 if (dma_unmap_addr(cb, dma_addr))
1731                         dma_unmap_single(&priv->pdev->dev,
1732                                          dma_unmap_addr(cb, dma_addr),
1733                                          RX_BUF_LENGTH, DMA_FROM_DEVICE);
1734                 bcm_sysport_free_cb(cb);
1735         }
1736
1737         kfree(priv->rx_cbs);
1738         priv->rx_cbs = NULL;
1739
1740         netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1741 }
1742
1743 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1744 {
1745         struct bcm_sysport_priv *priv = netdev_priv(dev);
1746         u32 reg;
1747
1748         if (priv->is_lite)
1749                 return;
1750
1751         reg = umac_readl(priv, UMAC_CMD);
1752         if (dev->flags & IFF_PROMISC)
1753                 reg |= CMD_PROMISC;
1754         else
1755                 reg &= ~CMD_PROMISC;
1756         umac_writel(priv, reg, UMAC_CMD);
1757
1758         /* No support for ALLMULTI */
1759         if (dev->flags & IFF_ALLMULTI)
1760                 return;
1761 }
1762
1763 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1764                                    u32 mask, unsigned int enable)
1765 {
1766         u32 reg;
1767
1768         if (!priv->is_lite) {
1769                 reg = umac_readl(priv, UMAC_CMD);
1770                 if (enable)
1771                         reg |= mask;
1772                 else
1773                         reg &= ~mask;
1774                 umac_writel(priv, reg, UMAC_CMD);
1775         } else {
1776                 reg = gib_readl(priv, GIB_CONTROL);
1777                 if (enable)
1778                         reg |= mask;
1779                 else
1780                         reg &= ~mask;
1781                 gib_writel(priv, reg, GIB_CONTROL);
1782         }
1783
1784         /* UniMAC stops on a packet boundary, wait for a full-sized packet
1785          * to be processed (1 msec).
1786          */
1787         if (enable == 0)
1788                 usleep_range(1000, 2000);
1789 }
1790
1791 static inline void umac_reset(struct bcm_sysport_priv *priv)
1792 {
1793         u32 reg;
1794
1795         if (priv->is_lite)
1796                 return;
1797
1798         reg = umac_readl(priv, UMAC_CMD);
1799         reg |= CMD_SW_RESET;
1800         umac_writel(priv, reg, UMAC_CMD);
1801         udelay(10);
1802         reg = umac_readl(priv, UMAC_CMD);
1803         reg &= ~CMD_SW_RESET;
1804         umac_writel(priv, reg, UMAC_CMD);
1805 }
1806
1807 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1808                              unsigned char *addr)
1809 {
1810         u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) |
1811                     addr[3];
1812         u32 mac1 = (addr[4] << 8) | addr[5];
1813
1814         if (!priv->is_lite) {
1815                 umac_writel(priv, mac0, UMAC_MAC0);
1816                 umac_writel(priv, mac1, UMAC_MAC1);
1817         } else {
1818                 gib_writel(priv, mac0, GIB_MAC0);
1819                 gib_writel(priv, mac1, GIB_MAC1);
1820         }
1821 }
1822
1823 static void topctrl_flush(struct bcm_sysport_priv *priv)
1824 {
1825         topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1826         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1827         mdelay(1);
1828         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1829         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1830 }
1831
1832 static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1833 {
1834         struct bcm_sysport_priv *priv = netdev_priv(dev);
1835         struct sockaddr *addr = p;
1836
1837         if (!is_valid_ether_addr(addr->sa_data))
1838                 return -EINVAL;
1839
1840         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1841
1842         /* interface is disabled, changes to MAC will be reflected on next
1843          * open call
1844          */
1845         if (!netif_running(dev))
1846                 return 0;
1847
1848         umac_set_hw_addr(priv, dev->dev_addr);
1849
1850         return 0;
1851 }
1852
1853 static void bcm_sysport_get_stats64(struct net_device *dev,
1854                                     struct rtnl_link_stats64 *stats)
1855 {
1856         struct bcm_sysport_priv *priv = netdev_priv(dev);
1857         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
1858         unsigned int start;
1859
1860         netdev_stats_to_stats64(stats, &dev->stats);
1861
1862         bcm_sysport_update_tx_stats(priv, &stats->tx_bytes,
1863                                     &stats->tx_packets);
1864
1865         do {
1866                 start = u64_stats_fetch_begin_irq(&priv->syncp);
1867                 stats->rx_packets = stats64->rx_packets;
1868                 stats->rx_bytes = stats64->rx_bytes;
1869         } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
1870 }
1871
1872 static void bcm_sysport_netif_start(struct net_device *dev)
1873 {
1874         struct bcm_sysport_priv *priv = netdev_priv(dev);
1875
1876         /* Enable NAPI */
1877         bcm_sysport_init_dim(priv, bcm_sysport_dim_work);
1878         bcm_sysport_init_rx_coalesce(priv);
1879         napi_enable(&priv->napi);
1880
1881         /* Enable RX interrupt and TX ring full interrupt */
1882         intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1883
1884         phy_start(dev->phydev);
1885
1886         /* Enable TX interrupts for the TXQs */
1887         if (!priv->is_lite)
1888                 intrl2_1_mask_clear(priv, 0xffffffff);
1889         else
1890                 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK);
1891 }
1892
1893 static void rbuf_init(struct bcm_sysport_priv *priv)
1894 {
1895         u32 reg;
1896
1897         reg = rbuf_readl(priv, RBUF_CONTROL);
1898         reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1899         /* Set a correct RSB format on SYSTEMPORT Lite */
1900         if (priv->is_lite)
1901                 reg &= ~RBUF_RSB_SWAP1;
1902
1903         /* Set a correct RSB format based on host endian */
1904         if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1905                 reg |= RBUF_RSB_SWAP0;
1906         else
1907                 reg &= ~RBUF_RSB_SWAP0;
1908         rbuf_writel(priv, reg, RBUF_CONTROL);
1909 }
1910
1911 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv)
1912 {
1913         intrl2_0_mask_set(priv, 0xffffffff);
1914         intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1915         if (!priv->is_lite) {
1916                 intrl2_1_mask_set(priv, 0xffffffff);
1917                 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1918         }
1919 }
1920
1921 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv)
1922 {
1923         u32 reg;
1924
1925         reg = gib_readl(priv, GIB_CONTROL);
1926         /* Include Broadcom tag in pad extension and fix up IPG_LENGTH */
1927         if (netdev_uses_dsa(priv->netdev)) {
1928                 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT);
1929                 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT;
1930         }
1931         reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT);
1932         reg |= 12 << GIB_IPG_LEN_SHIFT;
1933         gib_writel(priv, reg, GIB_CONTROL);
1934 }
1935
1936 static int bcm_sysport_open(struct net_device *dev)
1937 {
1938         struct bcm_sysport_priv *priv = netdev_priv(dev);
1939         struct phy_device *phydev;
1940         unsigned int i;
1941         int ret;
1942
1943         /* Reset UniMAC */
1944         umac_reset(priv);
1945
1946         /* Flush TX and RX FIFOs at TOPCTRL level */
1947         topctrl_flush(priv);
1948
1949         /* Disable the UniMAC RX/TX */
1950         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1951
1952         /* Enable RBUF 2bytes alignment and Receive Status Block */
1953         rbuf_init(priv);
1954
1955         /* Set maximum frame length */
1956         if (!priv->is_lite)
1957                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1958         else
1959                 gib_set_pad_extension(priv);
1960
1961         /* Apply features again in case we changed them while interface was
1962          * down
1963          */
1964         bcm_sysport_set_features(dev, dev->features);
1965
1966         /* Set MAC address */
1967         umac_set_hw_addr(priv, dev->dev_addr);
1968
1969         phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1970                                 0, priv->phy_interface);
1971         if (!phydev) {
1972                 netdev_err(dev, "could not attach to PHY\n");
1973                 return -ENODEV;
1974         }
1975
1976         /* Reset house keeping link status */
1977         priv->old_duplex = -1;
1978         priv->old_link = -1;
1979         priv->old_pause = -1;
1980
1981         /* mask all interrupts and request them */
1982         bcm_sysport_mask_all_intrs(priv);
1983
1984         ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
1985         if (ret) {
1986                 netdev_err(dev, "failed to request RX interrupt\n");
1987                 goto out_phy_disconnect;
1988         }
1989
1990         if (!priv->is_lite) {
1991                 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0,
1992                                   dev->name, dev);
1993                 if (ret) {
1994                         netdev_err(dev, "failed to request TX interrupt\n");
1995                         goto out_free_irq0;
1996                 }
1997         }
1998
1999         /* Initialize both hardware and software ring */
2000         for (i = 0; i < dev->num_tx_queues; i++) {
2001                 ret = bcm_sysport_init_tx_ring(priv, i);
2002                 if (ret) {
2003                         netdev_err(dev, "failed to initialize TX ring %d\n",
2004                                    i);
2005                         goto out_free_tx_ring;
2006                 }
2007         }
2008
2009         /* Initialize linked-list */
2010         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2011
2012         /* Initialize RX ring */
2013         ret = bcm_sysport_init_rx_ring(priv);
2014         if (ret) {
2015                 netdev_err(dev, "failed to initialize RX ring\n");
2016                 goto out_free_rx_ring;
2017         }
2018
2019         /* Turn on RDMA */
2020         ret = rdma_enable_set(priv, 1);
2021         if (ret)
2022                 goto out_free_rx_ring;
2023
2024         /* Turn on TDMA */
2025         ret = tdma_enable_set(priv, 1);
2026         if (ret)
2027                 goto out_clear_rx_int;
2028
2029         /* Turn on UniMAC TX/RX */
2030         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
2031
2032         bcm_sysport_netif_start(dev);
2033
2034         netif_tx_start_all_queues(dev);
2035
2036         return 0;
2037
2038 out_clear_rx_int:
2039         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
2040 out_free_rx_ring:
2041         bcm_sysport_fini_rx_ring(priv);
2042 out_free_tx_ring:
2043         for (i = 0; i < dev->num_tx_queues; i++)
2044                 bcm_sysport_fini_tx_ring(priv, i);
2045         if (!priv->is_lite)
2046                 free_irq(priv->irq1, dev);
2047 out_free_irq0:
2048         free_irq(priv->irq0, dev);
2049 out_phy_disconnect:
2050         phy_disconnect(phydev);
2051         return ret;
2052 }
2053
2054 static void bcm_sysport_netif_stop(struct net_device *dev)
2055 {
2056         struct bcm_sysport_priv *priv = netdev_priv(dev);
2057
2058         /* stop all software from updating hardware */
2059         netif_tx_disable(dev);
2060         napi_disable(&priv->napi);
2061         cancel_work_sync(&priv->dim.dim.work);
2062         phy_stop(dev->phydev);
2063
2064         /* mask all interrupts */
2065         bcm_sysport_mask_all_intrs(priv);
2066 }
2067
2068 static int bcm_sysport_stop(struct net_device *dev)
2069 {
2070         struct bcm_sysport_priv *priv = netdev_priv(dev);
2071         unsigned int i;
2072         int ret;
2073
2074         bcm_sysport_netif_stop(dev);
2075
2076         /* Disable UniMAC RX */
2077         umac_enable_set(priv, CMD_RX_EN, 0);
2078
2079         ret = tdma_enable_set(priv, 0);
2080         if (ret) {
2081                 netdev_err(dev, "timeout disabling RDMA\n");
2082                 return ret;
2083         }
2084
2085         /* Wait for a maximum packet size to be drained */
2086         usleep_range(2000, 3000);
2087
2088         ret = rdma_enable_set(priv, 0);
2089         if (ret) {
2090                 netdev_err(dev, "timeout disabling TDMA\n");
2091                 return ret;
2092         }
2093
2094         /* Disable UniMAC TX */
2095         umac_enable_set(priv, CMD_TX_EN, 0);
2096
2097         /* Free RX/TX rings SW structures */
2098         for (i = 0; i < dev->num_tx_queues; i++)
2099                 bcm_sysport_fini_tx_ring(priv, i);
2100         bcm_sysport_fini_rx_ring(priv);
2101
2102         free_irq(priv->irq0, dev);
2103         if (!priv->is_lite)
2104                 free_irq(priv->irq1, dev);
2105
2106         /* Disconnect from PHY */
2107         phy_disconnect(dev->phydev);
2108
2109         return 0;
2110 }
2111
2112 static int bcm_sysport_rule_find(struct bcm_sysport_priv *priv,
2113                                  u64 location)
2114 {
2115         unsigned int index;
2116         u32 reg;
2117
2118         for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2119                 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2120                 reg >>= RXCHK_BRCM_TAG_CID_SHIFT;
2121                 reg &= RXCHK_BRCM_TAG_CID_MASK;
2122                 if (reg == location)
2123                         return index;
2124         }
2125
2126         return -EINVAL;
2127 }
2128
2129 static int bcm_sysport_rule_get(struct bcm_sysport_priv *priv,
2130                                 struct ethtool_rxnfc *nfc)
2131 {
2132         int index;
2133
2134         /* This is not a rule that we know about */
2135         index = bcm_sysport_rule_find(priv, nfc->fs.location);
2136         if (index < 0)
2137                 return -EOPNOTSUPP;
2138
2139         nfc->fs.ring_cookie = RX_CLS_FLOW_WAKE;
2140
2141         return 0;
2142 }
2143
2144 static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv,
2145                                 struct ethtool_rxnfc *nfc)
2146 {
2147         unsigned int index;
2148         u32 reg;
2149
2150         /* We cannot match locations greater than what the classification ID
2151          * permits (256 entries)
2152          */
2153         if (nfc->fs.location > RXCHK_BRCM_TAG_CID_MASK)
2154                 return -E2BIG;
2155
2156         /* We cannot support flows that are not destined for a wake-up */
2157         if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE)
2158                 return -EOPNOTSUPP;
2159
2160         /* All filters are already in use, we cannot match more rules */
2161         if (bitmap_weight(priv->filters, RXCHK_BRCM_TAG_MAX) ==
2162             RXCHK_BRCM_TAG_MAX)
2163                 return -ENOSPC;
2164
2165         index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX);
2166         if (index >= RXCHK_BRCM_TAG_MAX)
2167                 return -ENOSPC;
2168
2169         /* Location is the classification ID, and index is the position
2170          * within one of our 8 possible filters to be programmed
2171          */
2172         reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2173         reg &= ~(RXCHK_BRCM_TAG_CID_MASK << RXCHK_BRCM_TAG_CID_SHIFT);
2174         reg |= nfc->fs.location << RXCHK_BRCM_TAG_CID_SHIFT;
2175         rxchk_writel(priv, reg, RXCHK_BRCM_TAG(index));
2176         rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
2177
2178         priv->filters_loc[index] = nfc->fs.location;
2179         set_bit(index, priv->filters);
2180
2181         return 0;
2182 }
2183
2184 static int bcm_sysport_rule_del(struct bcm_sysport_priv *priv,
2185                                 u64 location)
2186 {
2187         int index;
2188
2189         /* This is not a rule that we know about */
2190         index = bcm_sysport_rule_find(priv, location);
2191         if (index < 0)
2192                 return -EOPNOTSUPP;
2193
2194         /* No need to disable this filter if it was enabled, this will
2195          * be taken care of during suspend time by bcm_sysport_suspend_to_wol
2196          */
2197         clear_bit(index, priv->filters);
2198         priv->filters_loc[index] = 0;
2199
2200         return 0;
2201 }
2202
2203 static int bcm_sysport_get_rxnfc(struct net_device *dev,
2204                                  struct ethtool_rxnfc *nfc, u32 *rule_locs)
2205 {
2206         struct bcm_sysport_priv *priv = netdev_priv(dev);
2207         int ret = -EOPNOTSUPP;
2208
2209         switch (nfc->cmd) {
2210         case ETHTOOL_GRXCLSRULE:
2211                 ret = bcm_sysport_rule_get(priv, nfc);
2212                 break;
2213         default:
2214                 break;
2215         }
2216
2217         return ret;
2218 }
2219
2220 static int bcm_sysport_set_rxnfc(struct net_device *dev,
2221                                  struct ethtool_rxnfc *nfc)
2222 {
2223         struct bcm_sysport_priv *priv = netdev_priv(dev);
2224         int ret = -EOPNOTSUPP;
2225
2226         switch (nfc->cmd) {
2227         case ETHTOOL_SRXCLSRLINS:
2228                 ret = bcm_sysport_rule_set(priv, nfc);
2229                 break;
2230         case ETHTOOL_SRXCLSRLDEL:
2231                 ret = bcm_sysport_rule_del(priv, nfc->fs.location);
2232                 break;
2233         default:
2234                 break;
2235         }
2236
2237         return ret;
2238 }
2239
2240 static const struct ethtool_ops bcm_sysport_ethtool_ops = {
2241         .supported_coalesce_params = ETHTOOL_COALESCE_USECS |
2242                                      ETHTOOL_COALESCE_MAX_FRAMES |
2243                                      ETHTOOL_COALESCE_USE_ADAPTIVE_RX,
2244         .get_drvinfo            = bcm_sysport_get_drvinfo,
2245         .get_msglevel           = bcm_sysport_get_msglvl,
2246         .set_msglevel           = bcm_sysport_set_msglvl,
2247         .get_link               = ethtool_op_get_link,
2248         .get_strings            = bcm_sysport_get_strings,
2249         .get_ethtool_stats      = bcm_sysport_get_stats,
2250         .get_sset_count         = bcm_sysport_get_sset_count,
2251         .get_wol                = bcm_sysport_get_wol,
2252         .set_wol                = bcm_sysport_set_wol,
2253         .get_coalesce           = bcm_sysport_get_coalesce,
2254         .set_coalesce           = bcm_sysport_set_coalesce,
2255         .get_link_ksettings     = phy_ethtool_get_link_ksettings,
2256         .set_link_ksettings     = phy_ethtool_set_link_ksettings,
2257         .get_rxnfc              = bcm_sysport_get_rxnfc,
2258         .set_rxnfc              = bcm_sysport_set_rxnfc,
2259 };
2260
2261 static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb,
2262                                     struct net_device *sb_dev)
2263 {
2264         struct bcm_sysport_priv *priv = netdev_priv(dev);
2265         u16 queue = skb_get_queue_mapping(skb);
2266         struct bcm_sysport_tx_ring *tx_ring;
2267         unsigned int q, port;
2268
2269         if (!netdev_uses_dsa(dev))
2270                 return netdev_pick_tx(dev, skb, NULL);
2271
2272         /* DSA tagging layer will have configured the correct queue */
2273         q = BRCM_TAG_GET_QUEUE(queue);
2274         port = BRCM_TAG_GET_PORT(queue);
2275         tx_ring = priv->ring_map[q + port * priv->per_port_num_tx_queues];
2276
2277         if (unlikely(!tx_ring))
2278                 return netdev_pick_tx(dev, skb, NULL);
2279
2280         return tx_ring->index;
2281 }
2282
2283 static const struct net_device_ops bcm_sysport_netdev_ops = {
2284         .ndo_start_xmit         = bcm_sysport_xmit,
2285         .ndo_tx_timeout         = bcm_sysport_tx_timeout,
2286         .ndo_open               = bcm_sysport_open,
2287         .ndo_stop               = bcm_sysport_stop,
2288         .ndo_set_features       = bcm_sysport_set_features,
2289         .ndo_set_rx_mode        = bcm_sysport_set_rx_mode,
2290         .ndo_set_mac_address    = bcm_sysport_change_mac,
2291 #ifdef CONFIG_NET_POLL_CONTROLLER
2292         .ndo_poll_controller    = bcm_sysport_poll_controller,
2293 #endif
2294         .ndo_get_stats64        = bcm_sysport_get_stats64,
2295         .ndo_select_queue       = bcm_sysport_select_queue,
2296 };
2297
2298 static int bcm_sysport_map_queues(struct notifier_block *nb,
2299                                   struct dsa_notifier_register_info *info)
2300 {
2301         struct bcm_sysport_tx_ring *ring;
2302         struct bcm_sysport_priv *priv;
2303         struct net_device *slave_dev;
2304         unsigned int num_tx_queues;
2305         unsigned int q, qp, port;
2306         struct net_device *dev;
2307
2308         priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2309         if (priv->netdev != info->master)
2310                 return 0;
2311
2312         dev = info->master;
2313
2314         /* We can't be setting up queue inspection for non directly attached
2315          * switches
2316          */
2317         if (info->switch_number)
2318                 return 0;
2319
2320         if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2321                 return 0;
2322
2323         port = info->port_number;
2324         slave_dev = info->info.dev;
2325
2326         /* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a
2327          * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of
2328          * per-port (slave_dev) network devices queue, we achieve just that.
2329          * This need to happen now before any slave network device is used such
2330          * it accurately reflects the number of real TX queues.
2331          */
2332         if (priv->is_lite)
2333                 netif_set_real_num_tx_queues(slave_dev,
2334                                              slave_dev->num_tx_queues / 2);
2335
2336         num_tx_queues = slave_dev->real_num_tx_queues;
2337
2338         if (priv->per_port_num_tx_queues &&
2339             priv->per_port_num_tx_queues != num_tx_queues)
2340                 netdev_warn(slave_dev, "asymmetric number of per-port queues\n");
2341
2342         priv->per_port_num_tx_queues = num_tx_queues;
2343
2344         for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues;
2345              q++) {
2346                 ring = &priv->tx_rings[q];
2347
2348                 if (ring->inspect)
2349                         continue;
2350
2351                 /* Just remember the mapping actual programming done
2352                  * during bcm_sysport_init_tx_ring
2353                  */
2354                 ring->switch_queue = qp;
2355                 ring->switch_port = port;
2356                 ring->inspect = true;
2357                 priv->ring_map[qp + port * num_tx_queues] = ring;
2358                 qp++;
2359         }
2360
2361         return 0;
2362 }
2363
2364 static int bcm_sysport_unmap_queues(struct notifier_block *nb,
2365                                     struct dsa_notifier_register_info *info)
2366 {
2367         struct bcm_sysport_tx_ring *ring;
2368         struct bcm_sysport_priv *priv;
2369         struct net_device *slave_dev;
2370         unsigned int num_tx_queues;
2371         struct net_device *dev;
2372         unsigned int q, qp, port;
2373
2374         priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2375         if (priv->netdev != info->master)
2376                 return 0;
2377
2378         dev = info->master;
2379
2380         if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2381                 return 0;
2382
2383         port = info->port_number;
2384         slave_dev = info->info.dev;
2385
2386         num_tx_queues = slave_dev->real_num_tx_queues;
2387
2388         for (q = 0; q < dev->num_tx_queues; q++) {
2389                 ring = &priv->tx_rings[q];
2390
2391                 if (ring->switch_port != port)
2392                         continue;
2393
2394                 if (!ring->inspect)
2395                         continue;
2396
2397                 ring->inspect = false;
2398                 qp = ring->switch_queue;
2399                 priv->ring_map[qp + port * num_tx_queues] = NULL;
2400         }
2401
2402         return 0;
2403 }
2404
2405 static int bcm_sysport_dsa_notifier(struct notifier_block *nb,
2406                                     unsigned long event, void *ptr)
2407 {
2408         int ret = NOTIFY_DONE;
2409
2410         switch (event) {
2411         case DSA_PORT_REGISTER:
2412                 ret = bcm_sysport_map_queues(nb, ptr);
2413                 break;
2414         case DSA_PORT_UNREGISTER:
2415                 ret = bcm_sysport_unmap_queues(nb, ptr);
2416                 break;
2417         }
2418
2419         return notifier_from_errno(ret);
2420 }
2421
2422 #define REV_FMT "v%2x.%02x"
2423
2424 static const struct bcm_sysport_hw_params bcm_sysport_params[] = {
2425         [SYSTEMPORT] = {
2426                 .is_lite = false,
2427                 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS,
2428         },
2429         [SYSTEMPORT_LITE] = {
2430                 .is_lite = true,
2431                 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS,
2432         },
2433 };
2434
2435 static const struct of_device_id bcm_sysport_of_match[] = {
2436         { .compatible = "brcm,systemportlite-v1.00",
2437           .data = &bcm_sysport_params[SYSTEMPORT_LITE] },
2438         { .compatible = "brcm,systemport-v1.00",
2439           .data = &bcm_sysport_params[SYSTEMPORT] },
2440         { .compatible = "brcm,systemport",
2441           .data = &bcm_sysport_params[SYSTEMPORT] },
2442         { /* sentinel */ }
2443 };
2444 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
2445
2446 static int bcm_sysport_probe(struct platform_device *pdev)
2447 {
2448         const struct bcm_sysport_hw_params *params;
2449         const struct of_device_id *of_id = NULL;
2450         struct bcm_sysport_priv *priv;
2451         struct device_node *dn;
2452         struct net_device *dev;
2453         const void *macaddr;
2454         u32 txq, rxq;
2455         int ret;
2456
2457         dn = pdev->dev.of_node;
2458         of_id = of_match_node(bcm_sysport_of_match, dn);
2459         if (!of_id || !of_id->data)
2460                 return -EINVAL;
2461
2462         ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
2463         if (ret)
2464                 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2465         if (ret) {
2466                 dev_err(&pdev->dev, "unable to set DMA mask: %d\n", ret);
2467                 return ret;
2468         }
2469
2470         /* Fairly quickly we need to know the type of adapter we have */
2471         params = of_id->data;
2472
2473         /* Read the Transmit/Receive Queue properties */
2474         if (of_property_read_u32(dn, "systemport,num-txq", &txq))
2475                 txq = TDMA_NUM_RINGS;
2476         if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
2477                 rxq = 1;
2478
2479         /* Sanity check the number of transmit queues */
2480         if (!txq || txq > TDMA_NUM_RINGS)
2481                 return -EINVAL;
2482
2483         dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
2484         if (!dev)
2485                 return -ENOMEM;
2486
2487         /* Initialize private members */
2488         priv = netdev_priv(dev);
2489
2490         /* Allocate number of TX rings */
2491         priv->tx_rings = devm_kcalloc(&pdev->dev, txq,
2492                                       sizeof(struct bcm_sysport_tx_ring),
2493                                       GFP_KERNEL);
2494         if (!priv->tx_rings)
2495                 return -ENOMEM;
2496
2497         priv->is_lite = params->is_lite;
2498         priv->num_rx_desc_words = params->num_rx_desc_words;
2499
2500         priv->irq0 = platform_get_irq(pdev, 0);
2501         if (!priv->is_lite) {
2502                 priv->irq1 = platform_get_irq(pdev, 1);
2503                 priv->wol_irq = platform_get_irq(pdev, 2);
2504         } else {
2505                 priv->wol_irq = platform_get_irq(pdev, 1);
2506         }
2507         if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) {
2508                 ret = -EINVAL;
2509                 goto err_free_netdev;
2510         }
2511
2512         priv->base = devm_platform_ioremap_resource(pdev, 0);
2513         if (IS_ERR(priv->base)) {
2514                 ret = PTR_ERR(priv->base);
2515                 goto err_free_netdev;
2516         }
2517
2518         priv->netdev = dev;
2519         priv->pdev = pdev;
2520
2521         ret = of_get_phy_mode(dn, &priv->phy_interface);
2522         /* Default to GMII interface mode */
2523         if (ret)
2524                 priv->phy_interface = PHY_INTERFACE_MODE_GMII;
2525
2526         /* In the case of a fixed PHY, the DT node associated
2527          * to the PHY is the Ethernet MAC DT node.
2528          */
2529         if (of_phy_is_fixed_link(dn)) {
2530                 ret = of_phy_register_fixed_link(dn);
2531                 if (ret) {
2532                         dev_err(&pdev->dev, "failed to register fixed PHY\n");
2533                         goto err_free_netdev;
2534                 }
2535
2536                 priv->phy_dn = dn;
2537         }
2538
2539         /* Initialize netdevice members */
2540         macaddr = of_get_mac_address(dn);
2541         if (IS_ERR(macaddr)) {
2542                 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
2543                 eth_hw_addr_random(dev);
2544         } else {
2545                 ether_addr_copy(dev->dev_addr, macaddr);
2546         }
2547
2548         SET_NETDEV_DEV(dev, &pdev->dev);
2549         dev_set_drvdata(&pdev->dev, dev);
2550         dev->ethtool_ops = &bcm_sysport_ethtool_ops;
2551         dev->netdev_ops = &bcm_sysport_netdev_ops;
2552         netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64);
2553
2554         dev->features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
2555                          NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2556                          NETIF_F_HW_VLAN_CTAG_TX;
2557         dev->hw_features |= dev->features;
2558         dev->vlan_features |= dev->features;
2559
2560         /* Request the WOL interrupt and advertise suspend if available */
2561         priv->wol_irq_disabled = 1;
2562         ret = devm_request_irq(&pdev->dev, priv->wol_irq,
2563                                bcm_sysport_wol_isr, 0, dev->name, priv);
2564         if (!ret)
2565                 device_set_wakeup_capable(&pdev->dev, 1);
2566
2567         /* Set the needed headroom once and for all */
2568         BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
2569         dev->needed_headroom += sizeof(struct bcm_tsb);
2570
2571         /* libphy will adjust the link state accordingly */
2572         netif_carrier_off(dev);
2573
2574         priv->rx_max_coalesced_frames = 1;
2575         u64_stats_init(&priv->syncp);
2576
2577         priv->dsa_notifier.notifier_call = bcm_sysport_dsa_notifier;
2578
2579         ret = register_dsa_notifier(&priv->dsa_notifier);
2580         if (ret) {
2581                 dev_err(&pdev->dev, "failed to register DSA notifier\n");
2582                 goto err_deregister_fixed_link;
2583         }
2584
2585         ret = register_netdev(dev);
2586         if (ret) {
2587                 dev_err(&pdev->dev, "failed to register net_device\n");
2588                 goto err_deregister_notifier;
2589         }
2590
2591         priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
2592         dev_info(&pdev->dev,
2593                  "Broadcom SYSTEMPORT%s " REV_FMT
2594                  " (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
2595                  priv->is_lite ? " Lite" : "",
2596                  (priv->rev >> 8) & 0xff, priv->rev & 0xff,
2597                  priv->irq0, priv->irq1, txq, rxq);
2598
2599         return 0;
2600
2601 err_deregister_notifier:
2602         unregister_dsa_notifier(&priv->dsa_notifier);
2603 err_deregister_fixed_link:
2604         if (of_phy_is_fixed_link(dn))
2605                 of_phy_deregister_fixed_link(dn);
2606 err_free_netdev:
2607         free_netdev(dev);
2608         return ret;
2609 }
2610
2611 static int bcm_sysport_remove(struct platform_device *pdev)
2612 {
2613         struct net_device *dev = dev_get_drvdata(&pdev->dev);
2614         struct bcm_sysport_priv *priv = netdev_priv(dev);
2615         struct device_node *dn = pdev->dev.of_node;
2616
2617         /* Not much to do, ndo_close has been called
2618          * and we use managed allocations
2619          */
2620         unregister_dsa_notifier(&priv->dsa_notifier);
2621         unregister_netdev(dev);
2622         if (of_phy_is_fixed_link(dn))
2623                 of_phy_deregister_fixed_link(dn);
2624         free_netdev(dev);
2625         dev_set_drvdata(&pdev->dev, NULL);
2626
2627         return 0;
2628 }
2629
2630 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
2631 {
2632         struct net_device *ndev = priv->netdev;
2633         unsigned int timeout = 1000;
2634         unsigned int index, i = 0;
2635         u32 reg;
2636
2637         reg = umac_readl(priv, UMAC_MPD_CTRL);
2638         if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE))
2639                 reg |= MPD_EN;
2640         reg &= ~PSW_EN;
2641         if (priv->wolopts & WAKE_MAGICSECURE) {
2642                 /* Program the SecureOn password */
2643                 umac_writel(priv, get_unaligned_be16(&priv->sopass[0]),
2644                             UMAC_PSW_MS);
2645                 umac_writel(priv, get_unaligned_be32(&priv->sopass[2]),
2646                             UMAC_PSW_LS);
2647                 reg |= PSW_EN;
2648         }
2649         umac_writel(priv, reg, UMAC_MPD_CTRL);
2650
2651         if (priv->wolopts & WAKE_FILTER) {
2652                 /* Turn on ACPI matching to steal packets from RBUF */
2653                 reg = rbuf_readl(priv, RBUF_CONTROL);
2654                 if (priv->is_lite)
2655                         reg |= RBUF_ACPI_EN_LITE;
2656                 else
2657                         reg |= RBUF_ACPI_EN;
2658                 rbuf_writel(priv, reg, RBUF_CONTROL);
2659
2660                 /* Enable RXCHK, active filters and Broadcom tag matching */
2661                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2662                 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
2663                          RXCHK_BRCM_TAG_MATCH_SHIFT);
2664                 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2665                         reg |= BIT(RXCHK_BRCM_TAG_MATCH_SHIFT + i);
2666                         i++;
2667                 }
2668                 reg |= RXCHK_EN | RXCHK_BRCM_TAG_EN;
2669                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2670         }
2671
2672         /* Make sure RBUF entered WoL mode as result */
2673         do {
2674                 reg = rbuf_readl(priv, RBUF_STATUS);
2675                 if (reg & RBUF_WOL_MODE)
2676                         break;
2677
2678                 udelay(10);
2679         } while (timeout-- > 0);
2680
2681         /* Do not leave the UniMAC RBUF matching only MPD packets */
2682         if (!timeout) {
2683                 mpd_enable_set(priv, false);
2684                 netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
2685                 return -ETIMEDOUT;
2686         }
2687
2688         /* UniMAC receive needs to be turned on */
2689         umac_enable_set(priv, CMD_RX_EN, 1);
2690
2691         netif_dbg(priv, wol, ndev, "entered WOL mode\n");
2692
2693         return 0;
2694 }
2695
2696 static int __maybe_unused bcm_sysport_suspend(struct device *d)
2697 {
2698         struct net_device *dev = dev_get_drvdata(d);
2699         struct bcm_sysport_priv *priv = netdev_priv(dev);
2700         unsigned int i;
2701         int ret = 0;
2702         u32 reg;
2703
2704         if (!netif_running(dev))
2705                 return 0;
2706
2707         netif_device_detach(dev);
2708
2709         bcm_sysport_netif_stop(dev);
2710
2711         phy_suspend(dev->phydev);
2712
2713         /* Disable UniMAC RX */
2714         umac_enable_set(priv, CMD_RX_EN, 0);
2715
2716         ret = rdma_enable_set(priv, 0);
2717         if (ret) {
2718                 netdev_err(dev, "RDMA timeout!\n");
2719                 return ret;
2720         }
2721
2722         /* Disable RXCHK if enabled */
2723         if (priv->rx_chk_en) {
2724                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2725                 reg &= ~RXCHK_EN;
2726                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2727         }
2728
2729         /* Flush RX pipe */
2730         if (!priv->wolopts)
2731                 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
2732
2733         ret = tdma_enable_set(priv, 0);
2734         if (ret) {
2735                 netdev_err(dev, "TDMA timeout!\n");
2736                 return ret;
2737         }
2738
2739         /* Wait for a packet boundary */
2740         usleep_range(2000, 3000);
2741
2742         umac_enable_set(priv, CMD_TX_EN, 0);
2743
2744         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
2745
2746         /* Free RX/TX rings SW structures */
2747         for (i = 0; i < dev->num_tx_queues; i++)
2748                 bcm_sysport_fini_tx_ring(priv, i);
2749         bcm_sysport_fini_rx_ring(priv);
2750
2751         /* Get prepared for Wake-on-LAN */
2752         if (device_may_wakeup(d) && priv->wolopts)
2753                 ret = bcm_sysport_suspend_to_wol(priv);
2754
2755         return ret;
2756 }
2757
2758 static int __maybe_unused bcm_sysport_resume(struct device *d)
2759 {
2760         struct net_device *dev = dev_get_drvdata(d);
2761         struct bcm_sysport_priv *priv = netdev_priv(dev);
2762         unsigned int i;
2763         int ret;
2764
2765         if (!netif_running(dev))
2766                 return 0;
2767
2768         umac_reset(priv);
2769
2770         /* Disable the UniMAC RX/TX */
2771         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
2772
2773         /* We may have been suspended and never received a WOL event that
2774          * would turn off MPD detection, take care of that now
2775          */
2776         bcm_sysport_resume_from_wol(priv);
2777
2778         /* Initialize both hardware and software ring */
2779         for (i = 0; i < dev->num_tx_queues; i++) {
2780                 ret = bcm_sysport_init_tx_ring(priv, i);
2781                 if (ret) {
2782                         netdev_err(dev, "failed to initialize TX ring %d\n",
2783                                    i);
2784                         goto out_free_tx_rings;
2785                 }
2786         }
2787
2788         /* Initialize linked-list */
2789         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2790
2791         /* Initialize RX ring */
2792         ret = bcm_sysport_init_rx_ring(priv);
2793         if (ret) {
2794                 netdev_err(dev, "failed to initialize RX ring\n");
2795                 goto out_free_rx_ring;
2796         }
2797
2798         /* RX pipe enable */
2799         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2800
2801         ret = rdma_enable_set(priv, 1);
2802         if (ret) {
2803                 netdev_err(dev, "failed to enable RDMA\n");
2804                 goto out_free_rx_ring;
2805         }
2806
2807         /* Restore enabled features */
2808         bcm_sysport_set_features(dev, dev->features);
2809
2810         rbuf_init(priv);
2811
2812         /* Set maximum frame length */
2813         if (!priv->is_lite)
2814                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2815         else
2816                 gib_set_pad_extension(priv);
2817
2818         /* Set MAC address */
2819         umac_set_hw_addr(priv, dev->dev_addr);
2820
2821         umac_enable_set(priv, CMD_RX_EN, 1);
2822
2823         /* TX pipe enable */
2824         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2825
2826         umac_enable_set(priv, CMD_TX_EN, 1);
2827
2828         ret = tdma_enable_set(priv, 1);
2829         if (ret) {
2830                 netdev_err(dev, "TDMA timeout!\n");
2831                 goto out_free_rx_ring;
2832         }
2833
2834         phy_resume(dev->phydev);
2835
2836         bcm_sysport_netif_start(dev);
2837
2838         netif_device_attach(dev);
2839
2840         return 0;
2841
2842 out_free_rx_ring:
2843         bcm_sysport_fini_rx_ring(priv);
2844 out_free_tx_rings:
2845         for (i = 0; i < dev->num_tx_queues; i++)
2846                 bcm_sysport_fini_tx_ring(priv, i);
2847         return ret;
2848 }
2849
2850 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2851                 bcm_sysport_suspend, bcm_sysport_resume);
2852
2853 static struct platform_driver bcm_sysport_driver = {
2854         .probe  = bcm_sysport_probe,
2855         .remove = bcm_sysport_remove,
2856         .driver =  {
2857                 .name = "brcm-systemport",
2858                 .of_match_table = bcm_sysport_of_match,
2859                 .pm = &bcm_sysport_pm_ops,
2860         },
2861 };
2862 module_platform_driver(bcm_sysport_driver);
2863
2864 MODULE_AUTHOR("Broadcom Corporation");
2865 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2866 MODULE_ALIAS("platform:brcm-systemport");
2867 MODULE_LICENSE("GPL");