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/dsa/brcm.h>
  16 #include <linux/etherdevice.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/of.h>
  19 #include <linux/of_net.h>
  20 #include <linux/of_mdio.h>
  21 #include <linux/phy.h>
  22 #include <linux/phy_fixed.h>
  23 #include <net/dsa.h>
  24 #include <linux/clk.h>
  25 #include <net/ip.h>
  26 #include <net/ipv6.h>
  27
  28 #include "bcmsysport.h"
  29
  30 /* On SYSTEMPORT Lite, any register after RDMA_STATUS has the exact
  31  * same layout, except it has been moved by 4 bytes up, *sigh*
  32  */
  33 static inline u32 rdma_readl(struct bcm_sysport_priv *priv, u32 off)
  34 {
  35         if (priv->is_lite && off >= RDMA_STATUS)
  36                 off += 4;
  37         return readl_relaxed(priv->base + SYS_PORT_RDMA_OFFSET + off);
  38 }
  39
  40 static inline void rdma_writel(struct bcm_sysport_priv *priv, u32 val, u32 off)
  41 {
  42         if (priv->is_lite && off >= RDMA_STATUS)
  43                 off += 4;
  44         writel_relaxed(val, priv->base + SYS_PORT_RDMA_OFFSET + off);
  45 }
  46
  47 static inline u32 tdma_control_bit(struct bcm_sysport_priv *priv, u32 bit)
  48 {
  49         if (!priv->is_lite) {
  50                 return BIT(bit);
  51         } else {
  52                 if (bit >= ACB_ALGO)
  53                         return BIT(bit + 1);
  54                 else
  55                         return BIT(bit);
  56         }
  57 }
  58
  59 /* L2-interrupt masking/unmasking helpers, does automatic saving of the applied
  60  * mask in a software copy to avoid CPU_MASK_STATUS reads in hot-paths.
  61   */
  62 #define BCM_SYSPORT_INTR_L2(which)      \
  63 static inline void intrl2_##which##_mask_clear(struct bcm_sysport_priv *priv, \
  64                                                 u32 mask)               \
  65 {                                                                       \
  66         priv->irq##which##_mask &= ~(mask);                             \
  67         intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR);     \
  68 }                                                                       \
  69 static inline void intrl2_##which##_mask_set(struct bcm_sysport_priv *priv, \
  70                                                 u32 mask)               \
  71 {                                                                       \
  72         intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET);      \
  73         priv->irq##which##_mask |= (mask);                              \
  74 }                                                                       \
  75
  76 BCM_SYSPORT_INTR_L2(0)
  77 BCM_SYSPORT_INTR_L2(1)
  78
  79 /* Register accesses to GISB/RBUS registers are expensive (few hundred
  80  * nanoseconds), so keep the check for 64-bits explicit here to save
  81  * one register write per-packet on 32-bits platforms.
  82  */
  83 static inline void dma_desc_set_addr(struct bcm_sysport_priv *priv,
  84                                      void __iomem *d,
  85                                      dma_addr_t addr)
  86 {
  87 #ifdef CONFIG_PHYS_ADDR_T_64BIT
  88         writel_relaxed(upper_32_bits(addr) & DESC_ADDR_HI_MASK,
  89                      d + DESC_ADDR_HI_STATUS_LEN);
  90 #endif
  91         writel_relaxed(lower_32_bits(addr), d + DESC_ADDR_LO);
  92 }
  93
  94 /* Ethtool operations */
  95 static void bcm_sysport_set_rx_csum(struct net_device *dev,
  96                                     netdev_features_t wanted)
  97 {
  98         struct bcm_sysport_priv *priv = netdev_priv(dev);
  99         u32 reg;
 100
 101         priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM);
 102         reg = rxchk_readl(priv, RXCHK_CONTROL);
 103         /* Clear L2 header checks, which would prevent BPDUs
 104          * from being received.
 105          */
 106         reg &= ~RXCHK_L2_HDR_DIS;
 107         if (priv->rx_chk_en)
 108                 reg |= RXCHK_EN;
 109         else
 110                 reg &= ~RXCHK_EN;
 111
 112         /* If UniMAC forwards CRC, we need to skip over it to get
 113          * a valid CHK bit to be set in the per-packet status word
 114          */
 115         if (priv->rx_chk_en && priv->crc_fwd)
 116                 reg |= RXCHK_SKIP_FCS;
 117         else
 118                 reg &= ~RXCHK_SKIP_FCS;
 119
 120         /* If Broadcom tags are enabled (e.g: using a switch), make
 121          * sure we tell the RXCHK hardware to expect a 4-bytes Broadcom
 122          * tag after the Ethernet MAC Source Address.
 123          */
 124         if (netdev_uses_dsa(dev))
 125                 reg |= RXCHK_BRCM_TAG_EN;
 126         else
 127                 reg &= ~RXCHK_BRCM_TAG_EN;
 128
 129         rxchk_writel(priv, reg, RXCHK_CONTROL);
 130 }
 131
 132 static void bcm_sysport_set_tx_csum(struct net_device *dev,
 133                                     netdev_features_t wanted)
 134 {
 135         struct bcm_sysport_priv *priv = netdev_priv(dev);
 136         u32 reg;
 137
 138         /* Hardware transmit checksum requires us to enable the Transmit status
 139          * block prepended to the packet contents
 140          */
 141         priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
 142                                     NETIF_F_HW_VLAN_CTAG_TX));
 143         reg = tdma_readl(priv, TDMA_CONTROL);
 144         if (priv->tsb_en)
 145                 reg |= tdma_control_bit(priv, TSB_EN);
 146         else
 147                 reg &= ~tdma_control_bit(priv, TSB_EN);
 148         /* Indicating that software inserts Broadcom tags is needed for the TX
 149          * checksum to be computed correctly when using VLAN HW acceleration,
 150          * else it has no effect, so it can always be turned on.
 151          */
 152         if (netdev_uses_dsa(dev))
 153                 reg |= tdma_control_bit(priv, SW_BRCM_TAG);
 154         else
 155                 reg &= ~tdma_control_bit(priv, SW_BRCM_TAG);
 156         tdma_writel(priv, reg, TDMA_CONTROL);
 157
 158         /* Default TPID is ETH_P_8021AD, change to ETH_P_8021Q */
 159         if (wanted & NETIF_F_HW_VLAN_CTAG_TX)
 160                 tdma_writel(priv, ETH_P_8021Q, TDMA_TPID);
 161 }
 162
 163 static int bcm_sysport_set_features(struct net_device *dev,
 164                                     netdev_features_t features)
 165 {
 166         struct bcm_sysport_priv *priv = netdev_priv(dev);
 167         int ret;
 168
 169         ret = clk_prepare_enable(priv->clk);
 170         if (ret)
 171                 return ret;
 172
 173         /* Read CRC forward */
 174         if (!priv->is_lite)
 175                 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
 176         else
 177                 priv->crc_fwd = !((gib_readl(priv, GIB_CONTROL) &
 178                                   GIB_FCS_STRIP) >> GIB_FCS_STRIP_SHIFT);
 179
 180         bcm_sysport_set_rx_csum(dev, features);
 181         bcm_sysport_set_tx_csum(dev, features);
 182
 183         clk_disable_unprepare(priv->clk);
 184
 185         return 0;
 186 }
 187
 188 /* Hardware counters must be kept in sync because the order/offset
 189  * is important here (order in structure declaration = order in hardware)
 190  */
 191 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = {
 192         /* general stats */
 193         STAT_NETDEV64(rx_packets),
 194         STAT_NETDEV64(tx_packets),
 195         STAT_NETDEV64(rx_bytes),
 196         STAT_NETDEV64(tx_bytes),
 197         STAT_NETDEV(rx_errors),
 198         STAT_NETDEV(tx_errors),
 199         STAT_NETDEV(rx_dropped),
 200         STAT_NETDEV(tx_dropped),
 201         STAT_NETDEV(multicast),
 202         /* UniMAC RSV counters */
 203         STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
 204         STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
 205         STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
 206         STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
 207         STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
 208         STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
 209         STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
 210         STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
 211         STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
 212         STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
 213         STAT_MIB_RX("rx_pkts", mib.rx.pkt),
 214         STAT_MIB_RX("rx_bytes", mib.rx.bytes),
 215         STAT_MIB_RX("rx_multicast", mib.rx.mca),
 216         STAT_MIB_RX("rx_broadcast", mib.rx.bca),
 217         STAT_MIB_RX("rx_fcs", mib.rx.fcs),
 218         STAT_MIB_RX("rx_control", mib.rx.cf),
 219         STAT_MIB_RX("rx_pause", mib.rx.pf),
 220         STAT_MIB_RX("rx_unknown", mib.rx.uo),
 221         STAT_MIB_RX("rx_align", mib.rx.aln),
 222         STAT_MIB_RX("rx_outrange", mib.rx.flr),
 223         STAT_MIB_RX("rx_code", mib.rx.cde),
 224         STAT_MIB_RX("rx_carrier", mib.rx.fcr),
 225         STAT_MIB_RX("rx_oversize", mib.rx.ovr),
 226         STAT_MIB_RX("rx_jabber", mib.rx.jbr),
 227         STAT_MIB_RX("rx_mtu_err", mib.rx.mtue),
 228         STAT_MIB_RX("rx_good_pkts", mib.rx.pok),
 229         STAT_MIB_RX("rx_unicast", mib.rx.uc),
 230         STAT_MIB_RX("rx_ppp", mib.rx.ppp),
 231         STAT_MIB_RX("rx_crc", mib.rx.rcrc),
 232         /* UniMAC TSV counters */
 233         STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
 234         STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
 235         STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
 236         STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
 237         STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
 238         STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
 239         STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
 240         STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
 241         STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
 242         STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
 243         STAT_MIB_TX("tx_pkts", mib.tx.pkts),
 244         STAT_MIB_TX("tx_multicast", mib.tx.mca),
 245         STAT_MIB_TX("tx_broadcast", mib.tx.bca),
 246         STAT_MIB_TX("tx_pause", mib.tx.pf),
 247         STAT_MIB_TX("tx_control", mib.tx.cf),
 248         STAT_MIB_TX("tx_fcs_err", mib.tx.fcs),
 249         STAT_MIB_TX("tx_oversize", mib.tx.ovr),
 250         STAT_MIB_TX("tx_defer", mib.tx.drf),
 251         STAT_MIB_TX("tx_excess_defer", mib.tx.edf),
 252         STAT_MIB_TX("tx_single_col", mib.tx.scl),
 253         STAT_MIB_TX("tx_multi_col", mib.tx.mcl),
 254         STAT_MIB_TX("tx_late_col", mib.tx.lcl),
 255         STAT_MIB_TX("tx_excess_col", mib.tx.ecl),
 256         STAT_MIB_TX("tx_frags", mib.tx.frg),
 257         STAT_MIB_TX("tx_total_col", mib.tx.ncl),
 258         STAT_MIB_TX("tx_jabber", mib.tx.jbr),
 259         STAT_MIB_TX("tx_bytes", mib.tx.bytes),
 260         STAT_MIB_TX("tx_good_pkts", mib.tx.pok),
 261         STAT_MIB_TX("tx_unicast", mib.tx.uc),
 262         /* UniMAC RUNT counters */
 263         STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
 264         STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
 265         STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
 266         STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
 267         /* RXCHK misc statistics */
 268         STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR),
 269         STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc,
 270                    RXCHK_OTHER_DISC_CNTR),
 271         /* RBUF misc statistics */
 272         STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR),
 273         STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR),
 274         /* RDMA misc statistics */
 275         STAT_RDMA("rdma_ovflow_cnt", mib.rdma_ovflow_cnt, RDMA_OVFL_DISC_CNTR),
 276         STAT_MIB_SOFT("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
 277         STAT_MIB_SOFT("rx_dma_failed", mib.rx_dma_failed),
 278         STAT_MIB_SOFT("tx_dma_failed", mib.tx_dma_failed),
 279         STAT_MIB_SOFT("tx_realloc_tsb", mib.tx_realloc_tsb),
 280         STAT_MIB_SOFT("tx_realloc_tsb_failed", mib.tx_realloc_tsb_failed),
 281         /* Per TX-queue statistics are dynamically appended */
 282 };
 283
 284 #define BCM_SYSPORT_STATS_LEN   ARRAY_SIZE(bcm_sysport_gstrings_stats)
 285
 286 static void bcm_sysport_get_drvinfo(struct net_device *dev,
 287                                     struct ethtool_drvinfo *info)
 288 {
 289         strscpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
 290         strscpy(info->bus_info, "platform", sizeof(info->bus_info));
 291 }
 292
 293 static u32 bcm_sysport_get_msglvl(struct net_device *dev)
 294 {
 295         struct bcm_sysport_priv *priv = netdev_priv(dev);
 296
 297         return priv->msg_enable;
 298 }
 299
 300 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
 301 {
 302         struct bcm_sysport_priv *priv = netdev_priv(dev);
 303
 304         priv->msg_enable = enable;
 305 }
 306
 307 static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type)
 308 {
 309         switch (type) {
 310         case BCM_SYSPORT_STAT_NETDEV:
 311         case BCM_SYSPORT_STAT_NETDEV64:
 312         case BCM_SYSPORT_STAT_RXCHK:
 313         case BCM_SYSPORT_STAT_RBUF:
 314         case BCM_SYSPORT_STAT_RDMA:
 315         case BCM_SYSPORT_STAT_SOFT:
 316                 return true;
 317         default:
 318                 return false;
 319         }
 320 }
 321
 322 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set)
 323 {
 324         struct bcm_sysport_priv *priv = netdev_priv(dev);
 325         const struct bcm_sysport_stats *s;
 326         unsigned int i, j;
 327
 328         switch (string_set) {
 329         case ETH_SS_STATS:
 330                 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 331                         s = &bcm_sysport_gstrings_stats[i];
 332                         if (priv->is_lite &&
 333                             !bcm_sysport_lite_stat_valid(s->type))
 334                                 continue;
 335                         j++;
 336                 }
 337                 /* Include per-queue statistics */
 338                 return j + dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
 339         default:
 340                 return -EOPNOTSUPP;
 341         }
 342 }
 343
 344 static void bcm_sysport_get_strings(struct net_device *dev,
 345                                     u32 stringset, u8 *data)
 346 {
 347         struct bcm_sysport_priv *priv = netdev_priv(dev);
 348         const struct bcm_sysport_stats *s;
 349         int i;
 350
 351         switch (stringset) {
 352         case ETH_SS_STATS:
 353                 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 354                         s = &bcm_sysport_gstrings_stats[i];
 355                         if (priv->is_lite &&
 356                             !bcm_sysport_lite_stat_valid(s->type))
 357                                 continue;
 358
 359                         ethtool_puts(&data, s->stat_string);
 360                 }
 361
 362                 for (i = 0; i < dev->num_tx_queues; i++) {
 363                         ethtool_sprintf(&data, "txq%d_packets", i);
 364                         ethtool_sprintf(&data, "txq%d_bytes", i);
 365                 }
 366                 break;
 367         default:
 368                 break;
 369         }
 370 }
 371
 372 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
 373 {
 374         int i, j = 0;
 375
 376         for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 377                 const struct bcm_sysport_stats *s;
 378                 u8 offset = 0;
 379                 u32 val = 0;
 380                 char *p;
 381
 382                 s = &bcm_sysport_gstrings_stats[i];
 383                 switch (s->type) {
 384                 case BCM_SYSPORT_STAT_NETDEV:
 385                 case BCM_SYSPORT_STAT_NETDEV64:
 386                 case BCM_SYSPORT_STAT_SOFT:
 387                         continue;
 388                 case BCM_SYSPORT_STAT_MIB_RX:
 389                 case BCM_SYSPORT_STAT_MIB_TX:
 390                 case BCM_SYSPORT_STAT_RUNT:
 391                         if (priv->is_lite)
 392                                 continue;
 393
 394                         if (s->type != BCM_SYSPORT_STAT_MIB_RX)
 395                                 offset = UMAC_MIB_STAT_OFFSET;
 396                         val = umac_readl(priv, UMAC_MIB_START + j + offset);
 397                         break;
 398                 case BCM_SYSPORT_STAT_RXCHK:
 399                         val = rxchk_readl(priv, s->reg_offset);
 400                         if (val == ~0)
 401                                 rxchk_writel(priv, 0, s->reg_offset);
 402                         break;
 403                 case BCM_SYSPORT_STAT_RBUF:
 404                         val = rbuf_readl(priv, s->reg_offset);
 405                         if (val == ~0)
 406                                 rbuf_writel(priv, 0, s->reg_offset);
 407                         break;
 408                 case BCM_SYSPORT_STAT_RDMA:
 409                         if (!priv->is_lite)
 410                                 continue;
 411
 412                         val = rdma_readl(priv, s->reg_offset);
 413                         if (val == ~0)
 414                                 rdma_writel(priv, 0, s->reg_offset);
 415                         break;
 416                 }
 417
 418                 j += s->stat_sizeof;
 419                 p = (char *)priv + s->stat_offset;
 420                 *(u32 *)p = val;
 421         }
 422
 423         netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
 424 }
 425
 426 static void bcm_sysport_update_tx_stats(struct bcm_sysport_priv *priv,
 427                                         u64 *tx_bytes, u64 *tx_packets)
 428 {
 429         struct bcm_sysport_tx_ring *ring;
 430         u64 bytes = 0, packets = 0;
 431         unsigned int start;
 432         unsigned int q;
 433
 434         for (q = 0; q < priv->netdev->num_tx_queues; q++) {
 435                 ring = &priv->tx_rings[q];
 436                 do {
 437                         start = u64_stats_fetch_begin(&priv->syncp);
 438                         bytes = ring->bytes;
 439                         packets = ring->packets;
 440                 } while (u64_stats_fetch_retry(&priv->syncp, start));
 441
 442                 *tx_bytes += bytes;
 443                 *tx_packets += packets;
 444         }
 445 }
 446
 447 static void bcm_sysport_get_stats(struct net_device *dev,
 448                                   struct ethtool_stats *stats, u64 *data)
 449 {
 450         struct bcm_sysport_priv *priv = netdev_priv(dev);
 451         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
 452         struct u64_stats_sync *syncp = &priv->syncp;
 453         struct bcm_sysport_tx_ring *ring;
 454         u64 tx_bytes = 0, tx_packets = 0;
 455         unsigned int start;
 456         int i, j;
 457
 458         if (netif_running(dev)) {
 459                 bcm_sysport_update_mib_counters(priv);
 460                 bcm_sysport_update_tx_stats(priv, &tx_bytes, &tx_packets);
 461                 stats64->tx_bytes = tx_bytes;
 462                 stats64->tx_packets = tx_packets;
 463         }
 464
 465         for (i =  0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 466                 const struct bcm_sysport_stats *s;
 467                 char *p;
 468
 469                 s = &bcm_sysport_gstrings_stats[i];
 470                 if (s->type == BCM_SYSPORT_STAT_NETDEV)
 471                         p = (char *)&dev->stats;
 472                 else if (s->type == BCM_SYSPORT_STAT_NETDEV64)
 473                         p = (char *)stats64;
 474                 else
 475                         p = (char *)priv;
 476
 477                 if (priv->is_lite && !bcm_sysport_lite_stat_valid(s->type))
 478                         continue;
 479                 p += s->stat_offset;
 480
 481                 if (s->stat_sizeof == sizeof(u64) &&
 482                     s->type == BCM_SYSPORT_STAT_NETDEV64) {
 483                         do {
 484                                 start = u64_stats_fetch_begin(syncp);
 485                                 data[i] = *(u64 *)p;
 486                         } while (u64_stats_fetch_retry(syncp, start));
 487                 } else
 488                         data[i] = *(u32 *)p;
 489                 j++;
 490         }
 491
 492         /* For SYSTEMPORT Lite since we have holes in our statistics, j would
 493          * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it
 494          * needs to point to how many total statistics we have minus the
 495          * number of per TX queue statistics
 496          */
 497         j = bcm_sysport_get_sset_count(dev, ETH_SS_STATS) -
 498             dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
 499
 500         for (i = 0; i < dev->num_tx_queues; i++) {
 501                 ring = &priv->tx_rings[i];
 502                 data[j] = ring->packets;
 503                 j++;
 504                 data[j] = ring->bytes;
 505                 j++;
 506         }
 507 }
 508
 509 static void bcm_sysport_get_wol(struct net_device *dev,
 510                                 struct ethtool_wolinfo *wol)
 511 {
 512         struct bcm_sysport_priv *priv = netdev_priv(dev);
 513
 514         wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
 515         wol->wolopts = priv->wolopts;
 516
 517         if (!(priv->wolopts & WAKE_MAGICSECURE))
 518                 return;
 519
 520         memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass));
 521 }
 522
 523 static int bcm_sysport_set_wol(struct net_device *dev,
 524                                struct ethtool_wolinfo *wol)
 525 {
 526         struct bcm_sysport_priv *priv = netdev_priv(dev);
 527         struct device *kdev = &priv->pdev->dev;
 528         u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
 529
 530         if (!device_can_wakeup(kdev))
 531                 return -ENOTSUPP;
 532
 533         if (wol->wolopts & ~supported)
 534                 return -EINVAL;
 535
 536         if (wol->wolopts & WAKE_MAGICSECURE)
 537                 memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass));
 538
 539         /* Flag the device and relevant IRQ as wakeup capable */
 540         if (wol->wolopts) {
 541                 device_set_wakeup_enable(kdev, 1);
 542                 if (priv->wol_irq_disabled)
 543                         enable_irq_wake(priv->wol_irq);
 544                 priv->wol_irq_disabled = 0;
 545         } else {
 546                 device_set_wakeup_enable(kdev, 0);
 547                 /* Avoid unbalanced disable_irq_wake calls */
 548                 if (!priv->wol_irq_disabled)
 549                         disable_irq_wake(priv->wol_irq);
 550                 priv->wol_irq_disabled = 1;
 551         }
 552
 553         priv->wolopts = wol->wolopts;
 554
 555         return 0;
 556 }
 557
 558 static void bcm_sysport_set_rx_coalesce(struct bcm_sysport_priv *priv,
 559                                         u32 usecs, u32 pkts)
 560 {
 561         u32 reg;
 562
 563         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 564         reg &= ~(RDMA_INTR_THRESH_MASK |
 565                  RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT);
 566         reg |= pkts;
 567         reg |= DIV_ROUND_UP(usecs * 1000, 8192) << RDMA_TIMEOUT_SHIFT;
 568         rdma_writel(priv, reg, RDMA_MBDONE_INTR);
 569 }
 570
 571 static void bcm_sysport_set_tx_coalesce(struct bcm_sysport_tx_ring *ring,
 572                                         struct ethtool_coalesce *ec)
 573 {
 574         struct bcm_sysport_priv *priv = ring->priv;
 575         u32 reg;
 576
 577         reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(ring->index));
 578         reg &= ~(RING_INTR_THRESH_MASK |
 579                  RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT);
 580         reg |= ec->tx_max_coalesced_frames;
 581         reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) <<
 582                             RING_TIMEOUT_SHIFT;
 583         tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(ring->index));
 584 }
 585
 586 static int bcm_sysport_get_coalesce(struct net_device *dev,
 587                                     struct ethtool_coalesce *ec,
 588                                     struct kernel_ethtool_coalesce *kernel_coal,
 589                                     struct netlink_ext_ack *extack)
 590 {
 591         struct bcm_sysport_priv *priv = netdev_priv(dev);
 592         u32 reg;
 593
 594         reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0));
 595
 596         ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000;
 597         ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK;
 598
 599         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 600
 601         ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000;
 602         ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK;
 603         ec->use_adaptive_rx_coalesce = priv->dim.use_dim;
 604
 605         return 0;
 606 }
 607
 608 static int bcm_sysport_set_coalesce(struct net_device *dev,
 609                                     struct ethtool_coalesce *ec,
 610                                     struct kernel_ethtool_coalesce *kernel_coal,
 611                                     struct netlink_ext_ack *extack)
 612 {
 613         struct bcm_sysport_priv *priv = netdev_priv(dev);
 614         struct dim_cq_moder moder;
 615         u32 usecs, pkts;
 616         unsigned int i;
 617
 618         /* Base system clock is 125Mhz, DMA timeout is this reference clock
 619          * divided by 1024, which yield roughly 8.192 us, our maximum value has
 620          * to fit in the RING_TIMEOUT_MASK (16 bits).
 621          */
 622         if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
 623             ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
 624             ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
 625             ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
 626                 return -EINVAL;
 627
 628         if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
 629             (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0))
 630                 return -EINVAL;
 631
 632         for (i = 0; i < dev->num_tx_queues; i++)
 633                 bcm_sysport_set_tx_coalesce(&priv->tx_rings[i], ec);
 634
 635         priv->rx_coalesce_usecs = ec->rx_coalesce_usecs;
 636         priv->rx_max_coalesced_frames = ec->rx_max_coalesced_frames;
 637         usecs = priv->rx_coalesce_usecs;
 638         pkts = priv->rx_max_coalesced_frames;
 639
 640         if (ec->use_adaptive_rx_coalesce && !priv->dim.use_dim) {
 641                 moder = net_dim_get_def_rx_moderation(priv->dim.dim.mode);
 642                 usecs = moder.usec;
 643                 pkts = moder.pkts;
 644         }
 645
 646         priv->dim.use_dim = ec->use_adaptive_rx_coalesce;
 647
 648         /* Apply desired coalescing parameters */
 649         bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
 650
 651         return 0;
 652 }
 653
 654 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
 655 {
 656         dev_consume_skb_any(cb->skb);
 657         cb->skb = NULL;
 658         dma_unmap_addr_set(cb, dma_addr, 0);
 659 }
 660
 661 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
 662                                              struct bcm_sysport_cb *cb)
 663 {
 664         struct device *kdev = &priv->pdev->dev;
 665         struct net_device *ndev = priv->netdev;
 666         struct sk_buff *skb, *rx_skb;
 667         dma_addr_t mapping;
 668
 669         /* Allocate a new SKB for a new packet */
 670         skb = __netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH,
 671                                  GFP_ATOMIC | __GFP_NOWARN);
 672         if (!skb) {
 673                 priv->mib.alloc_rx_buff_failed++;
 674                 netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
 675                 return NULL;
 676         }
 677
 678         mapping = dma_map_single(kdev, skb->data,
 679                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 680         if (dma_mapping_error(kdev, mapping)) {
 681                 priv->mib.rx_dma_failed++;
 682                 dev_kfree_skb_any(skb);
 683                 netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
 684                 return NULL;
 685         }
 686
 687         /* Grab the current SKB on the ring */
 688         rx_skb = cb->skb;
 689         if (likely(rx_skb))
 690                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 691                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 692
 693         /* Put the new SKB on the ring */
 694         cb->skb = skb;
 695         dma_unmap_addr_set(cb, dma_addr, mapping);
 696         dma_desc_set_addr(priv, cb->bd_addr, mapping);
 697
 698         netif_dbg(priv, rx_status, ndev, "RX refill\n");
 699
 700         /* Return the current SKB to the caller */
 701         return rx_skb;
 702 }
 703
 704 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
 705 {
 706         struct bcm_sysport_cb *cb;
 707         struct sk_buff *skb;
 708         unsigned int i;
 709
 710         for (i = 0; i < priv->num_rx_bds; i++) {
 711                 cb = &priv->rx_cbs[i];
 712                 skb = bcm_sysport_rx_refill(priv, cb);
 713                 dev_kfree_skb(skb);
 714                 if (!cb->skb)
 715                         return -ENOMEM;
 716         }
 717
 718         return 0;
 719 }
 720
 721 /* Poll the hardware for up to budget packets to process */
 722 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
 723                                         unsigned int budget)
 724 {
 725         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
 726         struct net_device *ndev = priv->netdev;
 727         unsigned int processed = 0, to_process;
 728         unsigned int processed_bytes = 0;
 729         struct bcm_sysport_cb *cb;
 730         struct sk_buff *skb;
 731         unsigned int p_index;
 732         u16 len, status;
 733         struct bcm_rsb *rsb;
 734
 735         /* Clear status before servicing to reduce spurious interrupts */
 736         intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR);
 737
 738         /* Determine how much we should process since last call, SYSTEMPORT Lite
 739          * groups the producer and consumer indexes into the same 32-bit
 740          * which we access using RDMA_CONS_INDEX
 741          */
 742         if (!priv->is_lite)
 743                 p_index = rdma_readl(priv, RDMA_PROD_INDEX);
 744         else
 745                 p_index = rdma_readl(priv, RDMA_CONS_INDEX);
 746         p_index &= RDMA_PROD_INDEX_MASK;
 747
 748         to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK;
 749
 750         netif_dbg(priv, rx_status, ndev,
 751                   "p_index=%d rx_c_index=%d to_process=%d\n",
 752                   p_index, priv->rx_c_index, to_process);
 753
 754         while ((processed < to_process) && (processed < budget)) {
 755                 cb = &priv->rx_cbs[priv->rx_read_ptr];
 756                 skb = bcm_sysport_rx_refill(priv, cb);
 757
 758
 759                 /* We do not have a backing SKB, so we do not a corresponding
 760                  * DMA mapping for this incoming packet since
 761                  * bcm_sysport_rx_refill always either has both skb and mapping
 762                  * or none.
 763                  */
 764                 if (unlikely(!skb)) {
 765                         netif_err(priv, rx_err, ndev, "out of memory!\n");
 766                         ndev->stats.rx_dropped++;
 767                         ndev->stats.rx_errors++;
 768                         goto next;
 769                 }
 770
 771                 /* Extract the Receive Status Block prepended */
 772                 rsb = (struct bcm_rsb *)skb->data;
 773                 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
 774                 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
 775                           DESC_STATUS_MASK;
 776
 777                 netif_dbg(priv, rx_status, ndev,
 778                           "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
 779                           p_index, priv->rx_c_index, priv->rx_read_ptr,
 780                           len, status);
 781
 782                 if (unlikely(len > RX_BUF_LENGTH)) {
 783                         netif_err(priv, rx_status, ndev, "oversized packet\n");
 784                         ndev->stats.rx_length_errors++;
 785                         ndev->stats.rx_errors++;
 786                         dev_kfree_skb_any(skb);
 787                         goto next;
 788                 }
 789
 790                 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
 791                         netif_err(priv, rx_status, ndev, "fragmented packet!\n");
 792                         ndev->stats.rx_dropped++;
 793                         ndev->stats.rx_errors++;
 794                         dev_kfree_skb_any(skb);
 795                         goto next;
 796                 }
 797
 798                 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
 799                         netif_err(priv, rx_err, ndev, "error packet\n");
 800                         if (status & RX_STATUS_OVFLOW)
 801                                 ndev->stats.rx_over_errors++;
 802                         ndev->stats.rx_dropped++;
 803                         ndev->stats.rx_errors++;
 804                         dev_kfree_skb_any(skb);
 805                         goto next;
 806                 }
 807
 808                 skb_put(skb, len);
 809
 810                 /* Hardware validated our checksum */
 811                 if (likely(status & DESC_L4_CSUM))
 812                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 813
 814                 /* Hardware pre-pends packets with 2bytes before Ethernet
 815                  * header plus we have the Receive Status Block, strip off all
 816                  * of this from the SKB.
 817                  */
 818                 skb_pull(skb, sizeof(*rsb) + 2);
 819                 len -= (sizeof(*rsb) + 2);
 820                 processed_bytes += len;
 821
 822                 /* UniMAC may forward CRC */
 823                 if (priv->crc_fwd) {
 824                         skb_trim(skb, len - ETH_FCS_LEN);
 825                         len -= ETH_FCS_LEN;
 826                 }
 827
 828                 skb->protocol = eth_type_trans(skb, ndev);
 829                 ndev->stats.rx_packets++;
 830                 ndev->stats.rx_bytes += len;
 831                 u64_stats_update_begin(&priv->syncp);
 832                 stats64->rx_packets++;
 833                 stats64->rx_bytes += len;
 834                 u64_stats_update_end(&priv->syncp);
 835
 836                 napi_gro_receive(&priv->napi, skb);
 837 next:
 838                 processed++;
 839                 priv->rx_read_ptr++;
 840
 841                 if (priv->rx_read_ptr == priv->num_rx_bds)
 842                         priv->rx_read_ptr = 0;
 843         }
 844
 845         priv->dim.packets = processed;
 846         priv->dim.bytes = processed_bytes;
 847
 848         return processed;
 849 }
 850
 851 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring,
 852                                        struct bcm_sysport_cb *cb,
 853                                        unsigned int *bytes_compl,
 854                                        unsigned int *pkts_compl)
 855 {
 856         struct bcm_sysport_priv *priv = ring->priv;
 857         struct device *kdev = &priv->pdev->dev;
 858
 859         if (cb->skb) {
 860                 *bytes_compl += cb->skb->len;
 861                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 862                                  dma_unmap_len(cb, dma_len),
 863                                  DMA_TO_DEVICE);
 864                 (*pkts_compl)++;
 865                 bcm_sysport_free_cb(cb);
 866         /* SKB fragment */
 867         } else if (dma_unmap_addr(cb, dma_addr)) {
 868                 *bytes_compl += dma_unmap_len(cb, dma_len);
 869                 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
 870                                dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
 871                 dma_unmap_addr_set(cb, dma_addr, 0);
 872         }
 873 }
 874
 875 /* Reclaim queued SKBs for transmission completion, lockless version */
 876 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 877                                              struct bcm_sysport_tx_ring *ring)
 878 {
 879         unsigned int pkts_compl = 0, bytes_compl = 0;
 880         struct net_device *ndev = priv->netdev;
 881         unsigned int txbds_processed = 0;
 882         struct bcm_sysport_cb *cb;
 883         unsigned int txbds_ready;
 884         unsigned int c_index;
 885         u32 hw_ind;
 886
 887         /* Clear status before servicing to reduce spurious interrupts */
 888         if (!ring->priv->is_lite)
 889                 intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR);
 890         else
 891                 intrl2_0_writel(ring->priv, BIT(ring->index +
 892                                 INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR);
 893
 894         /* Compute how many descriptors have been processed since last call */
 895         hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
 896         c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
 897         txbds_ready = (c_index - ring->c_index) & RING_CONS_INDEX_MASK;
 898
 899         netif_dbg(priv, tx_done, ndev,
 900                   "ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
 901                   ring->index, ring->c_index, c_index, txbds_ready);
 902
 903         while (txbds_processed < txbds_ready) {
 904                 cb = &ring->cbs[ring->clean_index];
 905                 bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl);
 906
 907                 ring->desc_count++;
 908                 txbds_processed++;
 909
 910                 if (likely(ring->clean_index < ring->size - 1))
 911                         ring->clean_index++;
 912                 else
 913                         ring->clean_index = 0;
 914         }
 915
 916         u64_stats_update_begin(&priv->syncp);
 917         ring->packets += pkts_compl;
 918         ring->bytes += bytes_compl;
 919         u64_stats_update_end(&priv->syncp);
 920
 921         ring->c_index = c_index;
 922
 923         netif_dbg(priv, tx_done, ndev,
 924                   "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
 925                   ring->index, ring->c_index, pkts_compl, bytes_compl);
 926
 927         return pkts_compl;
 928 }
 929
 930 /* Locked version of the per-ring TX reclaim routine */
 931 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 932                                            struct bcm_sysport_tx_ring *ring)
 933 {
 934         struct netdev_queue *txq;
 935         unsigned int released;
 936         unsigned long flags;
 937
 938         txq = netdev_get_tx_queue(priv->netdev, ring->index);
 939
 940         spin_lock_irqsave(&ring->lock, flags);
 941         released = __bcm_sysport_tx_reclaim(priv, ring);
 942         if (released)
 943                 netif_tx_wake_queue(txq);
 944
 945         spin_unlock_irqrestore(&ring->lock, flags);
 946
 947         return released;
 948 }
 949
 950 /* Locked version of the per-ring TX reclaim, but does not wake the queue */
 951 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv,
 952                                  struct bcm_sysport_tx_ring *ring)
 953 {
 954         unsigned long flags;
 955
 956         spin_lock_irqsave(&ring->lock, flags);
 957         __bcm_sysport_tx_reclaim(priv, ring);
 958         spin_unlock_irqrestore(&ring->lock, flags);
 959 }
 960
 961 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
 962 {
 963         struct bcm_sysport_tx_ring *ring =
 964                 container_of(napi, struct bcm_sysport_tx_ring, napi);
 965         unsigned int work_done = 0;
 966
 967         work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
 968
 969         if (work_done == 0) {
 970                 napi_complete(napi);
 971                 /* re-enable TX interrupt */
 972                 if (!ring->priv->is_lite)
 973                         intrl2_1_mask_clear(ring->priv, BIT(ring->index));
 974                 else
 975                         intrl2_0_mask_clear(ring->priv, BIT(ring->index +
 976                                             INTRL2_0_TDMA_MBDONE_SHIFT));
 977
 978                 return 0;
 979         }
 980
 981         return budget;
 982 }
 983
 984 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
 985 {
 986         unsigned int q;
 987
 988         for (q = 0; q < priv->netdev->num_tx_queues; q++)
 989                 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
 990 }
 991
 992 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
 993 {
 994         struct bcm_sysport_priv *priv =
 995                 container_of(napi, struct bcm_sysport_priv, napi);
 996         struct dim_sample dim_sample = {};
 997         unsigned int work_done = 0;
 998
 999         work_done = bcm_sysport_desc_rx(priv, budget);
1000
1001         priv->rx_c_index += work_done;
1002         priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
1003
1004         /* SYSTEMPORT Lite groups the producer/consumer index, producer is
1005          * maintained by HW, but writes to it will be ignore while RDMA
1006          * is active
1007          */
1008         if (!priv->is_lite)
1009                 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
1010         else
1011                 rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX);
1012
1013         if (work_done < budget) {
1014                 napi_complete_done(napi, work_done);
1015                 /* re-enable RX interrupts */
1016                 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
1017         }
1018
1019         if (priv->dim.use_dim) {
1020                 dim_update_sample(priv->dim.event_ctr, priv->dim.packets,
1021                                   priv->dim.bytes, &dim_sample);
1022                 net_dim(&priv->dim.dim, &dim_sample);
1023         }
1024
1025         return work_done;
1026 }
1027
1028 static void mpd_enable_set(struct bcm_sysport_priv *priv, bool enable)
1029 {
1030         u32 reg, bit;
1031
1032         reg = umac_readl(priv, UMAC_MPD_CTRL);
1033         if (enable)
1034                 reg |= MPD_EN;
1035         else
1036                 reg &= ~MPD_EN;
1037         umac_writel(priv, reg, UMAC_MPD_CTRL);
1038
1039         if (priv->is_lite)
1040                 bit = RBUF_ACPI_EN_LITE;
1041         else
1042                 bit = RBUF_ACPI_EN;
1043
1044         reg = rbuf_readl(priv, RBUF_CONTROL);
1045         if (enable)
1046                 reg |= bit;
1047         else
1048                 reg &= ~bit;
1049         rbuf_writel(priv, reg, RBUF_CONTROL);
1050 }
1051
1052 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
1053 {
1054         unsigned int index;
1055         u32 reg;
1056
1057         /* Disable RXCHK, active filters and Broadcom tag matching */
1058         reg = rxchk_readl(priv, RXCHK_CONTROL);
1059         reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
1060                  RXCHK_BRCM_TAG_MATCH_SHIFT | RXCHK_EN | RXCHK_BRCM_TAG_EN);
1061         rxchk_writel(priv, reg, RXCHK_CONTROL);
1062
1063         /* Make sure we restore correct CID index in case HW lost
1064          * its context during deep idle state
1065          */
1066         for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
1067                 rxchk_writel(priv, priv->filters_loc[index] <<
1068                              RXCHK_BRCM_TAG_CID_SHIFT, RXCHK_BRCM_TAG(index));
1069                 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
1070         }
1071
1072         /* Clear the MagicPacket detection logic */
1073         mpd_enable_set(priv, false);
1074
1075         reg = intrl2_0_readl(priv, INTRL2_CPU_STATUS);
1076         if (reg & INTRL2_0_MPD)
1077                 netdev_info(priv->netdev, "Wake-on-LAN (MPD) interrupt!\n");
1078
1079         if (reg & INTRL2_0_BRCM_MATCH_TAG) {
1080                 reg = rxchk_readl(priv, RXCHK_BRCM_TAG_MATCH_STATUS) &
1081                                   RXCHK_BRCM_TAG_MATCH_MASK;
1082                 netdev_info(priv->netdev,
1083                             "Wake-on-LAN (filters 0x%02x) interrupt!\n", reg);
1084         }
1085
1086         netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
1087 }
1088
1089 static void bcm_sysport_dim_work(struct work_struct *work)
1090 {
1091         struct dim *dim = container_of(work, struct dim, work);
1092         struct bcm_sysport_net_dim *ndim =
1093                         container_of(dim, struct bcm_sysport_net_dim, dim);
1094         struct bcm_sysport_priv *priv =
1095                         container_of(ndim, struct bcm_sysport_priv, dim);
1096         struct dim_cq_moder cur_profile = net_dim_get_rx_moderation(dim->mode,
1097                                                                     dim->profile_ix);
1098
1099         bcm_sysport_set_rx_coalesce(priv, cur_profile.usec, cur_profile.pkts);
1100         dim->state = DIM_START_MEASURE;
1101 }
1102
1103 /* RX and misc interrupt routine */
1104 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
1105 {
1106         struct net_device *dev = dev_id;
1107         struct bcm_sysport_priv *priv = netdev_priv(dev);
1108         struct bcm_sysport_tx_ring *txr;
1109         unsigned int ring, ring_bit;
1110
1111         priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
1112                           ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
1113         intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
1114
1115         if (unlikely(priv->irq0_stat == 0)) {
1116                 netdev_warn(priv->netdev, "spurious RX interrupt\n");
1117                 return IRQ_NONE;
1118         }
1119
1120         if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
1121                 priv->dim.event_ctr++;
1122                 if (likely(napi_schedule_prep(&priv->napi))) {
1123                         /* disable RX interrupts */
1124                         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
1125                         __napi_schedule_irqoff(&priv->napi);
1126                 }
1127         }
1128
1129         /* TX ring is full, perform a full reclaim since we do not know
1130          * which one would trigger this interrupt
1131          */
1132         if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
1133                 bcm_sysport_tx_reclaim_all(priv);
1134
1135         if (!priv->is_lite)
1136                 goto out;
1137
1138         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1139                 ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT);
1140                 if (!(priv->irq0_stat & ring_bit))
1141                         continue;
1142
1143                 txr = &priv->tx_rings[ring];
1144
1145                 if (likely(napi_schedule_prep(&txr->napi))) {
1146                         intrl2_0_mask_set(priv, ring_bit);
1147                         __napi_schedule(&txr->napi);
1148                 }
1149         }
1150 out:
1151         return IRQ_HANDLED;
1152 }
1153
1154 /* TX interrupt service routine */
1155 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
1156 {
1157         struct net_device *dev = dev_id;
1158         struct bcm_sysport_priv *priv = netdev_priv(dev);
1159         struct bcm_sysport_tx_ring *txr;
1160         unsigned int ring;
1161
1162         priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
1163                                 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
1164         intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1165
1166         if (unlikely(priv->irq1_stat == 0)) {
1167                 netdev_warn(priv->netdev, "spurious TX interrupt\n");
1168                 return IRQ_NONE;
1169         }
1170
1171         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1172                 if (!(priv->irq1_stat & BIT(ring)))
1173                         continue;
1174
1175                 txr = &priv->tx_rings[ring];
1176
1177                 if (likely(napi_schedule_prep(&txr->napi))) {
1178                         intrl2_1_mask_set(priv, BIT(ring));
1179                         __napi_schedule_irqoff(&txr->napi);
1180                 }
1181         }
1182
1183         return IRQ_HANDLED;
1184 }
1185
1186 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
1187 {
1188         struct bcm_sysport_priv *priv = dev_id;
1189
1190         pm_wakeup_event(&priv->pdev->dev, 0);
1191
1192         return IRQ_HANDLED;
1193 }
1194
1195 #ifdef CONFIG_NET_POLL_CONTROLLER
1196 static void bcm_sysport_poll_controller(struct net_device *dev)
1197 {
1198         struct bcm_sysport_priv *priv = netdev_priv(dev);
1199
1200         disable_irq(priv->irq0);
1201         bcm_sysport_rx_isr(priv->irq0, priv);
1202         enable_irq(priv->irq0);
1203
1204         if (!priv->is_lite) {
1205                 disable_irq(priv->irq1);
1206                 bcm_sysport_tx_isr(priv->irq1, priv);
1207                 enable_irq(priv->irq1);
1208         }
1209 }
1210 #endif
1211
1212 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
1213                                               struct net_device *dev)
1214 {
1215         struct bcm_sysport_priv *priv = netdev_priv(dev);
1216         struct sk_buff *nskb;
1217         struct bcm_tsb *tsb;
1218         u32 csum_info;
1219         u8 ip_proto;
1220         u16 csum_start;
1221         __be16 ip_ver;
1222
1223         /* Re-allocate SKB if needed */
1224         if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
1225                 nskb = skb_realloc_headroom(skb, sizeof(*tsb));
1226                 if (!nskb) {
1227                         dev_kfree_skb_any(skb);
1228                         priv->mib.tx_realloc_tsb_failed++;
1229                         dev->stats.tx_errors++;
1230                         dev->stats.tx_dropped++;
1231                         return NULL;
1232                 }
1233                 dev_consume_skb_any(skb);
1234                 skb = nskb;
1235                 priv->mib.tx_realloc_tsb++;
1236         }
1237
1238         tsb = skb_push(skb, sizeof(*tsb));
1239         /* Zero-out TSB by default */
1240         memset(tsb, 0, sizeof(*tsb));
1241
1242         if (skb_vlan_tag_present(skb)) {
1243                 tsb->pcp_dei_vid = skb_vlan_tag_get_prio(skb) & PCP_DEI_MASK;
1244                 tsb->pcp_dei_vid |= (u32)skb_vlan_tag_get_id(skb) << VID_SHIFT;
1245         }
1246
1247         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1248                 ip_ver = skb->protocol;
1249                 switch (ip_ver) {
1250                 case htons(ETH_P_IP):
1251                         ip_proto = ip_hdr(skb)->protocol;
1252                         break;
1253                 case htons(ETH_P_IPV6):
1254                         ip_proto = ipv6_hdr(skb)->nexthdr;
1255                         break;
1256                 default:
1257                         return skb;
1258                 }
1259
1260                 /* Get the checksum offset and the L4 (transport) offset */
1261                 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
1262                 /* Account for the HW inserted VLAN tag */
1263                 if (skb_vlan_tag_present(skb))
1264                         csum_start += VLAN_HLEN;
1265                 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
1266                 csum_info |= (csum_start << L4_PTR_SHIFT);
1267
1268                 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1269                         csum_info |= L4_LENGTH_VALID;
1270                         if (ip_proto == IPPROTO_UDP &&
1271                             ip_ver == htons(ETH_P_IP))
1272                                 csum_info |= L4_UDP;
1273                 } else {
1274                         csum_info = 0;
1275                 }
1276
1277                 tsb->l4_ptr_dest_map = csum_info;
1278         }
1279
1280         return skb;
1281 }
1282
1283 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
1284                                     struct net_device *dev)
1285 {
1286         struct bcm_sysport_priv *priv = netdev_priv(dev);
1287         struct device *kdev = &priv->pdev->dev;
1288         struct bcm_sysport_tx_ring *ring;
1289         unsigned long flags, desc_flags;
1290         struct bcm_sysport_cb *cb;
1291         struct netdev_queue *txq;
1292         u32 len_status, addr_lo;
1293         unsigned int skb_len;
1294         dma_addr_t mapping;
1295         u16 queue;
1296         int ret;
1297
1298         queue = skb_get_queue_mapping(skb);
1299         txq = netdev_get_tx_queue(dev, queue);
1300         ring = &priv->tx_rings[queue];
1301
1302         /* lock against tx reclaim in BH context and TX ring full interrupt */
1303         spin_lock_irqsave(&ring->lock, flags);
1304         if (unlikely(ring->desc_count == 0)) {
1305                 netif_tx_stop_queue(txq);
1306                 netdev_err(dev, "queue %d awake and ring full!\n", queue);
1307                 ret = NETDEV_TX_BUSY;
1308                 goto out;
1309         }
1310
1311         /* Insert TSB and checksum infos */
1312         if (priv->tsb_en) {
1313                 skb = bcm_sysport_insert_tsb(skb, dev);
1314                 if (!skb) {
1315                         ret = NETDEV_TX_OK;
1316                         goto out;
1317                 }
1318         }
1319
1320         skb_len = skb->len;
1321
1322         mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1323         if (dma_mapping_error(kdev, mapping)) {
1324                 priv->mib.tx_dma_failed++;
1325                 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
1326                           skb->data, skb_len);
1327                 ret = NETDEV_TX_OK;
1328                 dev_kfree_skb_any(skb);
1329                 goto out;
1330         }
1331
1332         /* Remember the SKB for future freeing */
1333         cb = &ring->cbs[ring->curr_desc];
1334         cb->skb = skb;
1335         dma_unmap_addr_set(cb, dma_addr, mapping);
1336         dma_unmap_len_set(cb, dma_len, skb_len);
1337
1338         addr_lo = lower_32_bits(mapping);
1339         len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
1340         len_status |= (skb_len << DESC_LEN_SHIFT);
1341         len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
1342                        DESC_STATUS_SHIFT;
1343         if (skb->ip_summed == CHECKSUM_PARTIAL)
1344                 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1345         if (skb_vlan_tag_present(skb))
1346                 len_status |= (TX_STATUS_VLAN_VID_TSB << DESC_STATUS_SHIFT);
1347
1348         ring->curr_desc++;
1349         if (ring->curr_desc == ring->size)
1350                 ring->curr_desc = 0;
1351         ring->desc_count--;
1352
1353         /* Ports are latched, so write upper address first */
1354         spin_lock_irqsave(&priv->desc_lock, desc_flags);
1355         tdma_writel(priv, len_status, TDMA_WRITE_PORT_HI(ring->index));
1356         tdma_writel(priv, addr_lo, TDMA_WRITE_PORT_LO(ring->index));
1357         spin_unlock_irqrestore(&priv->desc_lock, desc_flags);
1358
1359         /* Check ring space and update SW control flow */
1360         if (ring->desc_count == 0)
1361                 netif_tx_stop_queue(txq);
1362
1363         netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
1364                   ring->index, ring->desc_count, ring->curr_desc);
1365
1366         ret = NETDEV_TX_OK;
1367 out:
1368         spin_unlock_irqrestore(&ring->lock, flags);
1369         return ret;
1370 }
1371
1372 static void bcm_sysport_tx_timeout(struct net_device *dev, unsigned int txqueue)
1373 {
1374         netdev_warn(dev, "transmit timeout!\n");
1375
1376         netif_trans_update(dev);
1377         dev->stats.tx_errors++;
1378
1379         netif_tx_wake_all_queues(dev);
1380 }
1381
1382 /* phylib adjust link callback */
1383 static void bcm_sysport_adj_link(struct net_device *dev)
1384 {
1385         struct bcm_sysport_priv *priv = netdev_priv(dev);
1386         struct phy_device *phydev = dev->phydev;
1387         unsigned int changed = 0;
1388         u32 cmd_bits = 0, reg;
1389
1390         if (priv->old_link != phydev->link) {
1391                 changed = 1;
1392                 priv->old_link = phydev->link;
1393         }
1394
1395         if (priv->old_duplex != phydev->duplex) {
1396                 changed = 1;
1397                 priv->old_duplex = phydev->duplex;
1398         }
1399
1400         if (priv->is_lite)
1401                 goto out;
1402
1403         switch (phydev->speed) {
1404         case SPEED_2500:
1405                 cmd_bits = CMD_SPEED_2500;
1406                 break;
1407         case SPEED_1000:
1408                 cmd_bits = CMD_SPEED_1000;
1409                 break;
1410         case SPEED_100:
1411                 cmd_bits = CMD_SPEED_100;
1412                 break;
1413         case SPEED_10:
1414                 cmd_bits = CMD_SPEED_10;
1415                 break;
1416         default:
1417                 break;
1418         }
1419         cmd_bits <<= CMD_SPEED_SHIFT;
1420
1421         if (phydev->duplex == DUPLEX_HALF)
1422                 cmd_bits |= CMD_HD_EN;
1423
1424         if (priv->old_pause != phydev->pause) {
1425                 changed = 1;
1426                 priv->old_pause = phydev->pause;
1427         }
1428
1429         if (!phydev->pause)
1430                 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1431
1432         if (!changed)
1433                 return;
1434
1435         if (phydev->link) {
1436                 reg = umac_readl(priv, UMAC_CMD);
1437                 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
1438                         CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1439                         CMD_TX_PAUSE_IGNORE);
1440                 reg |= cmd_bits;
1441                 umac_writel(priv, reg, UMAC_CMD);
1442         }
1443 out:
1444         if (changed)
1445                 phy_print_status(phydev);
1446 }
1447
1448 static void bcm_sysport_init_dim(struct bcm_sysport_priv *priv,
1449                                  void (*cb)(struct work_struct *work))
1450 {
1451         struct bcm_sysport_net_dim *dim = &priv->dim;
1452
1453         INIT_WORK(&dim->dim.work, cb);
1454         dim->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1455         dim->event_ctr = 0;
1456         dim->packets = 0;
1457         dim->bytes = 0;
1458 }
1459
1460 static void bcm_sysport_init_rx_coalesce(struct bcm_sysport_priv *priv)
1461 {
1462         struct bcm_sysport_net_dim *dim = &priv->dim;
1463         struct dim_cq_moder moder;
1464         u32 usecs, pkts;
1465
1466         usecs = priv->rx_coalesce_usecs;
1467         pkts = priv->rx_max_coalesced_frames;
1468
1469         /* If DIM was enabled, re-apply default parameters */
1470         if (dim->use_dim) {
1471                 moder = net_dim_get_def_rx_moderation(dim->dim.mode);
1472                 usecs = moder.usec;
1473                 pkts = moder.pkts;
1474         }
1475
1476         bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
1477 }
1478
1479 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1480                                     unsigned int index)
1481 {
1482         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1483         size_t size;
1484         u32 reg;
1485
1486         /* Simple descriptors partitioning for now */
1487         size = 256;
1488
1489         ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1490         if (!ring->cbs) {
1491                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1492                 return -ENOMEM;
1493         }
1494
1495         /* Initialize SW view of the ring */
1496         spin_lock_init(&ring->lock);
1497         ring->priv = priv;
1498         netif_napi_add_tx(priv->netdev, &ring->napi, bcm_sysport_tx_poll);
1499         ring->index = index;
1500         ring->size = size;
1501         ring->clean_index = 0;
1502         ring->alloc_size = ring->size;
1503         ring->desc_count = ring->size;
1504         ring->curr_desc = 0;
1505
1506         /* Initialize HW ring */
1507         tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1508         tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1509         tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1510         tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1511
1512         /* Configure QID and port mapping */
1513         reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index));
1514         reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT);
1515         if (ring->inspect) {
1516                 reg |= ring->switch_queue & RING_QID_MASK;
1517                 reg |= ring->switch_port << RING_PORT_ID_SHIFT;
1518         } else {
1519                 reg |= RING_IGNORE_STATUS;
1520         }
1521         tdma_writel(priv, reg, TDMA_DESC_RING_MAPPING(index));
1522         reg = 0;
1523         /* Adjust the packet size calculations if SYSTEMPORT is responsible
1524          * for HW insertion of VLAN tags
1525          */
1526         if (priv->netdev->features & NETIF_F_HW_VLAN_CTAG_TX)
1527                 reg = VLAN_HLEN << RING_PKT_SIZE_ADJ_SHIFT;
1528         tdma_writel(priv, reg, TDMA_DESC_RING_PCP_DEI_VID(index));
1529
1530         /* Enable ACB algorithm 2 */
1531         reg = tdma_readl(priv, TDMA_CONTROL);
1532         reg |= tdma_control_bit(priv, ACB_ALGO);
1533         tdma_writel(priv, reg, TDMA_CONTROL);
1534
1535         /* Do not use tdma_control_bit() here because TSB_SWAP1 collides
1536          * with the original definition of ACB_ALGO
1537          */
1538         reg = tdma_readl(priv, TDMA_CONTROL);
1539         if (priv->is_lite)
1540                 reg &= ~BIT(TSB_SWAP1);
1541         /* Set a correct TSB format based on host endian */
1542         if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1543                 reg |= tdma_control_bit(priv, TSB_SWAP0);
1544         else
1545                 reg &= ~tdma_control_bit(priv, TSB_SWAP0);
1546         tdma_writel(priv, reg, TDMA_CONTROL);
1547
1548         /* Program the number of descriptors as MAX_THRESHOLD and half of
1549          * its size for the hysteresis trigger
1550          */
1551         tdma_writel(priv, ring->size |
1552                         1 << RING_HYST_THRESH_SHIFT,
1553                         TDMA_DESC_RING_MAX_HYST(index));
1554
1555         /* Enable the ring queue in the arbiter */
1556         reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1557         reg |= (1 << index);
1558         tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1559
1560         napi_enable(&ring->napi);
1561
1562         netif_dbg(priv, hw, priv->netdev,
1563                   "TDMA cfg, size=%d, switch q=%d,port=%d\n",
1564                   ring->size, ring->switch_queue,
1565                   ring->switch_port);
1566
1567         return 0;
1568 }
1569
1570 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1571                                      unsigned int index)
1572 {
1573         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1574         u32 reg;
1575
1576         /* Caller should stop the TDMA engine */
1577         reg = tdma_readl(priv, TDMA_STATUS);
1578         if (!(reg & TDMA_DISABLED))
1579                 netdev_warn(priv->netdev, "TDMA not stopped!\n");
1580
1581         /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1582          * fail, so by checking this pointer we know whether the TX ring was
1583          * fully initialized or not.
1584          */
1585         if (!ring->cbs)
1586                 return;
1587
1588         napi_disable(&ring->napi);
1589         netif_napi_del(&ring->napi);
1590
1591         bcm_sysport_tx_clean(priv, ring);
1592
1593         kfree(ring->cbs);
1594         ring->cbs = NULL;
1595         ring->size = 0;
1596         ring->alloc_size = 0;
1597
1598         netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1599 }
1600
1601 /* RDMA helper */
1602 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1603                                   unsigned int enable)
1604 {
1605         unsigned int timeout = 1000;
1606         u32 reg;
1607
1608         reg = rdma_readl(priv, RDMA_CONTROL);
1609         if (enable)
1610                 reg |= RDMA_EN;
1611         else
1612                 reg &= ~RDMA_EN;
1613         rdma_writel(priv, reg, RDMA_CONTROL);
1614
1615         /* Poll for RMDA disabling completion */
1616         do {
1617                 reg = rdma_readl(priv, RDMA_STATUS);
1618                 if (!!(reg & RDMA_DISABLED) == !enable)
1619                         return 0;
1620                 usleep_range(1000, 2000);
1621         } while (timeout-- > 0);
1622
1623         netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1624
1625         return -ETIMEDOUT;
1626 }
1627
1628 /* TDMA helper */
1629 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1630                                   unsigned int enable)
1631 {
1632         unsigned int timeout = 1000;
1633         u32 reg;
1634
1635         reg = tdma_readl(priv, TDMA_CONTROL);
1636         if (enable)
1637                 reg |= tdma_control_bit(priv, TDMA_EN);
1638         else
1639                 reg &= ~tdma_control_bit(priv, TDMA_EN);
1640         tdma_writel(priv, reg, TDMA_CONTROL);
1641
1642         /* Poll for TMDA disabling completion */
1643         do {
1644                 reg = tdma_readl(priv, TDMA_STATUS);
1645                 if (!!(reg & TDMA_DISABLED) == !enable)
1646                         return 0;
1647
1648                 usleep_range(1000, 2000);
1649         } while (timeout-- > 0);
1650
1651         netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1652
1653         return -ETIMEDOUT;
1654 }
1655
1656 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1657 {
1658         struct bcm_sysport_cb *cb;
1659         u32 reg;
1660         int ret;
1661         int i;
1662
1663         /* Initialize SW view of the RX ring */
1664         priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC;
1665         priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1666         priv->rx_c_index = 0;
1667         priv->rx_read_ptr = 0;
1668         priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1669                                 GFP_KERNEL);
1670         if (!priv->rx_cbs) {
1671                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1672                 return -ENOMEM;
1673         }
1674
1675         for (i = 0; i < priv->num_rx_bds; i++) {
1676                 cb = priv->rx_cbs + i;
1677                 cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1678         }
1679
1680         ret = bcm_sysport_alloc_rx_bufs(priv);
1681         if (ret) {
1682                 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1683                 return ret;
1684         }
1685
1686         /* Initialize HW, ensure RDMA is disabled */
1687         reg = rdma_readl(priv, RDMA_STATUS);
1688         if (!(reg & RDMA_DISABLED))
1689                 rdma_enable_set(priv, 0);
1690
1691         rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1692         rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1693         rdma_writel(priv, 0, RDMA_PROD_INDEX);
1694         rdma_writel(priv, 0, RDMA_CONS_INDEX);
1695         rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1696                           RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1697         /* Operate the queue in ring mode */
1698         rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1699         rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1700         rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1701         rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO);
1702
1703         netif_dbg(priv, hw, priv->netdev,
1704                   "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1705                   priv->num_rx_bds, priv->rx_bds);
1706
1707         return 0;
1708 }
1709
1710 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1711 {
1712         struct bcm_sysport_cb *cb;
1713         unsigned int i;
1714         u32 reg;
1715
1716         /* Caller should ensure RDMA is disabled */
1717         reg = rdma_readl(priv, RDMA_STATUS);
1718         if (!(reg & RDMA_DISABLED))
1719                 netdev_warn(priv->netdev, "RDMA not stopped!\n");
1720
1721         for (i = 0; i < priv->num_rx_bds; i++) {
1722                 cb = &priv->rx_cbs[i];
1723                 if (dma_unmap_addr(cb, dma_addr))
1724                         dma_unmap_single(&priv->pdev->dev,
1725                                          dma_unmap_addr(cb, dma_addr),
1726                                          RX_BUF_LENGTH, DMA_FROM_DEVICE);
1727                 bcm_sysport_free_cb(cb);
1728         }
1729
1730         kfree(priv->rx_cbs);
1731         priv->rx_cbs = NULL;
1732
1733         netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1734 }
1735
1736 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1737 {
1738         struct bcm_sysport_priv *priv = netdev_priv(dev);
1739         u32 reg;
1740
1741         if (priv->is_lite)
1742                 return;
1743
1744         reg = umac_readl(priv, UMAC_CMD);
1745         if (dev->flags & IFF_PROMISC)
1746                 reg |= CMD_PROMISC;
1747         else
1748                 reg &= ~CMD_PROMISC;
1749         umac_writel(priv, reg, UMAC_CMD);
1750
1751         /* No support for ALLMULTI */
1752         if (dev->flags & IFF_ALLMULTI)
1753                 return;
1754 }
1755
1756 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1757                                    u32 mask, unsigned int enable)
1758 {
1759         u32 reg;
1760
1761         if (!priv->is_lite) {
1762                 reg = umac_readl(priv, UMAC_CMD);
1763                 if (enable)
1764                         reg |= mask;
1765                 else
1766                         reg &= ~mask;
1767                 umac_writel(priv, reg, UMAC_CMD);
1768         } else {
1769                 reg = gib_readl(priv, GIB_CONTROL);
1770                 if (enable)
1771                         reg |= mask;
1772                 else
1773                         reg &= ~mask;
1774                 gib_writel(priv, reg, GIB_CONTROL);
1775         }
1776
1777         /* UniMAC stops on a packet boundary, wait for a full-sized packet
1778          * to be processed (1 msec).
1779          */
1780         if (enable == 0)
1781                 usleep_range(1000, 2000);
1782 }
1783
1784 static inline void umac_reset(struct bcm_sysport_priv *priv)
1785 {
1786         u32 reg;
1787
1788         if (priv->is_lite)
1789                 return;
1790
1791         reg = umac_readl(priv, UMAC_CMD);
1792         reg |= CMD_SW_RESET;
1793         umac_writel(priv, reg, UMAC_CMD);
1794         udelay(10);
1795         reg = umac_readl(priv, UMAC_CMD);
1796         reg &= ~CMD_SW_RESET;
1797         umac_writel(priv, reg, UMAC_CMD);
1798 }
1799
1800 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1801                              const unsigned char *addr)
1802 {
1803         u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) |
1804                     addr[3];
1805         u32 mac1 = (addr[4] << 8) | addr[5];
1806
1807         if (!priv->is_lite) {
1808                 umac_writel(priv, mac0, UMAC_MAC0);
1809                 umac_writel(priv, mac1, UMAC_MAC1);
1810         } else {
1811                 gib_writel(priv, mac0, GIB_MAC0);
1812                 gib_writel(priv, mac1, GIB_MAC1);
1813         }
1814 }
1815
1816 static void topctrl_flush(struct bcm_sysport_priv *priv)
1817 {
1818         topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1819         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1820         mdelay(1);
1821         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1822         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1823 }
1824
1825 static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1826 {
1827         struct bcm_sysport_priv *priv = netdev_priv(dev);
1828         struct sockaddr *addr = p;
1829
1830         if (!is_valid_ether_addr(addr->sa_data))
1831                 return -EINVAL;
1832
1833         eth_hw_addr_set(dev, addr->sa_data);
1834
1835         /* interface is disabled, changes to MAC will be reflected on next
1836          * open call
1837          */
1838         if (!netif_running(dev))
1839                 return 0;
1840
1841         umac_set_hw_addr(priv, dev->dev_addr);
1842
1843         return 0;
1844 }
1845
1846 static void bcm_sysport_get_stats64(struct net_device *dev,
1847                                     struct rtnl_link_stats64 *stats)
1848 {
1849         struct bcm_sysport_priv *priv = netdev_priv(dev);
1850         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
1851         unsigned int start;
1852
1853         netdev_stats_to_stats64(stats, &dev->stats);
1854
1855         bcm_sysport_update_tx_stats(priv, &stats->tx_bytes,
1856                                     &stats->tx_packets);
1857
1858         do {
1859                 start = u64_stats_fetch_begin(&priv->syncp);
1860                 stats->rx_packets = stats64->rx_packets;
1861                 stats->rx_bytes = stats64->rx_bytes;
1862         } while (u64_stats_fetch_retry(&priv->syncp, start));
1863 }
1864
1865 static void bcm_sysport_netif_start(struct net_device *dev)
1866 {
1867         struct bcm_sysport_priv *priv = netdev_priv(dev);
1868
1869         /* Enable NAPI */
1870         bcm_sysport_init_dim(priv, bcm_sysport_dim_work);
1871         bcm_sysport_init_rx_coalesce(priv);
1872         napi_enable(&priv->napi);
1873
1874         /* Enable RX interrupt and TX ring full interrupt */
1875         intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1876
1877         phy_start(dev->phydev);
1878
1879         /* Enable TX interrupts for the TXQs */
1880         if (!priv->is_lite)
1881                 intrl2_1_mask_clear(priv, 0xffffffff);
1882         else
1883                 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK);
1884 }
1885
1886 static void rbuf_init(struct bcm_sysport_priv *priv)
1887 {
1888         u32 reg;
1889
1890         reg = rbuf_readl(priv, RBUF_CONTROL);
1891         reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1892         /* Set a correct RSB format on SYSTEMPORT Lite */
1893         if (priv->is_lite)
1894                 reg &= ~RBUF_RSB_SWAP1;
1895
1896         /* Set a correct RSB format based on host endian */
1897         if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1898                 reg |= RBUF_RSB_SWAP0;
1899         else
1900                 reg &= ~RBUF_RSB_SWAP0;
1901         rbuf_writel(priv, reg, RBUF_CONTROL);
1902 }
1903
1904 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv)
1905 {
1906         intrl2_0_mask_set(priv, 0xffffffff);
1907         intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1908         if (!priv->is_lite) {
1909                 intrl2_1_mask_set(priv, 0xffffffff);
1910                 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1911         }
1912 }
1913
1914 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv)
1915 {
1916         u32 reg;
1917
1918         reg = gib_readl(priv, GIB_CONTROL);
1919         /* Include Broadcom tag in pad extension and fix up IPG_LENGTH */
1920         if (netdev_uses_dsa(priv->netdev)) {
1921                 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT);
1922                 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT;
1923         }
1924         reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT);
1925         reg |= 12 << GIB_IPG_LEN_SHIFT;
1926         gib_writel(priv, reg, GIB_CONTROL);
1927 }
1928
1929 static int bcm_sysport_open(struct net_device *dev)
1930 {
1931         struct bcm_sysport_priv *priv = netdev_priv(dev);
1932         struct phy_device *phydev;
1933         unsigned int i;
1934         int ret;
1935
1936         ret = clk_prepare_enable(priv->clk);
1937         if (ret) {
1938                 netdev_err(dev, "could not enable priv clock\n");
1939                 return ret;
1940         }
1941
1942         /* Reset UniMAC */
1943         umac_reset(priv);
1944
1945         /* Flush TX and RX FIFOs at TOPCTRL level */
1946         topctrl_flush(priv);
1947
1948         /* Disable the UniMAC RX/TX */
1949         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1950
1951         /* Enable RBUF 2bytes alignment and Receive Status Block */
1952         rbuf_init(priv);
1953
1954         /* Set maximum frame length */
1955         if (!priv->is_lite)
1956                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1957         else
1958                 gib_set_pad_extension(priv);
1959
1960         /* Apply features again in case we changed them while interface was
1961          * down
1962          */
1963         bcm_sysport_set_features(dev, dev->features);
1964
1965         /* Set MAC address */
1966         umac_set_hw_addr(priv, dev->dev_addr);
1967
1968         phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1969                                 0, priv->phy_interface);
1970         if (!phydev) {
1971                 netdev_err(dev, "could not attach to PHY\n");
1972                 ret = -ENODEV;
1973                 goto out_clk_disable;
1974         }
1975
1976         /* Indicate that the MAC is responsible for PHY PM */
1977         phydev->mac_managed_pm = true;
1978
1979         /* Reset house keeping link status */
1980         priv->old_duplex = -1;
1981         priv->old_link = -1;
1982         priv->old_pause = -1;
1983
1984         /* mask all interrupts and request them */
1985         bcm_sysport_mask_all_intrs(priv);
1986
1987         ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
1988         if (ret) {
1989                 netdev_err(dev, "failed to request RX interrupt\n");
1990                 goto out_phy_disconnect;
1991         }
1992
1993         if (!priv->is_lite) {
1994                 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0,
1995                                   dev->name, dev);
1996                 if (ret) {
1997                         netdev_err(dev, "failed to request TX interrupt\n");
1998                         goto out_free_irq0;
1999                 }
2000         }
2001
2002         /* Initialize both hardware and software ring */
2003         spin_lock_init(&priv->desc_lock);
2004         for (i = 0; i < dev->num_tx_queues; i++) {
2005                 ret = bcm_sysport_init_tx_ring(priv, i);
2006                 if (ret) {
2007                         netdev_err(dev, "failed to initialize TX ring %d\n",
2008                                    i);
2009                         goto out_free_tx_ring;
2010                 }
2011         }
2012
2013         /* Initialize linked-list */
2014         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2015
2016         /* Initialize RX ring */
2017         ret = bcm_sysport_init_rx_ring(priv);
2018         if (ret) {
2019                 netdev_err(dev, "failed to initialize RX ring\n");
2020                 goto out_free_rx_ring;
2021         }
2022
2023         /* Turn on RDMA */
2024         ret = rdma_enable_set(priv, 1);
2025         if (ret)
2026                 goto out_free_rx_ring;
2027
2028         /* Turn on TDMA */
2029         ret = tdma_enable_set(priv, 1);
2030         if (ret)
2031                 goto out_clear_rx_int;
2032
2033         /* Turn on UniMAC TX/RX */
2034         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
2035
2036         bcm_sysport_netif_start(dev);
2037
2038         netif_tx_start_all_queues(dev);
2039
2040         return 0;
2041
2042 out_clear_rx_int:
2043         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
2044 out_free_rx_ring:
2045         bcm_sysport_fini_rx_ring(priv);
2046 out_free_tx_ring:
2047         for (i = 0; i < dev->num_tx_queues; i++)
2048                 bcm_sysport_fini_tx_ring(priv, i);
2049         if (!priv->is_lite)
2050                 free_irq(priv->irq1, dev);
2051 out_free_irq0:
2052         free_irq(priv->irq0, dev);
2053 out_phy_disconnect:
2054         phy_disconnect(phydev);
2055 out_clk_disable:
2056         clk_disable_unprepare(priv->clk);
2057         return ret;
2058 }
2059
2060 static void bcm_sysport_netif_stop(struct net_device *dev)
2061 {
2062         struct bcm_sysport_priv *priv = netdev_priv(dev);
2063
2064         /* stop all software from updating hardware */
2065         netif_tx_disable(dev);
2066         napi_disable(&priv->napi);
2067         cancel_work_sync(&priv->dim.dim.work);
2068         phy_stop(dev->phydev);
2069
2070         /* mask all interrupts */
2071         bcm_sysport_mask_all_intrs(priv);
2072 }
2073
2074 static int bcm_sysport_stop(struct net_device *dev)
2075 {
2076         struct bcm_sysport_priv *priv = netdev_priv(dev);
2077         unsigned int i;
2078         int ret;
2079
2080         bcm_sysport_netif_stop(dev);
2081
2082         /* Disable UniMAC RX */
2083         umac_enable_set(priv, CMD_RX_EN, 0);
2084
2085         ret = tdma_enable_set(priv, 0);
2086         if (ret) {
2087                 netdev_err(dev, "timeout disabling RDMA\n");
2088                 return ret;
2089         }
2090
2091         /* Wait for a maximum packet size to be drained */
2092         usleep_range(2000, 3000);
2093
2094         ret = rdma_enable_set(priv, 0);
2095         if (ret) {
2096                 netdev_err(dev, "timeout disabling TDMA\n");
2097                 return ret;
2098         }
2099
2100         /* Disable UniMAC TX */
2101         umac_enable_set(priv, CMD_TX_EN, 0);
2102
2103         /* Free RX/TX rings SW structures */
2104         for (i = 0; i < dev->num_tx_queues; i++)
2105                 bcm_sysport_fini_tx_ring(priv, i);
2106         bcm_sysport_fini_rx_ring(priv);
2107
2108         free_irq(priv->irq0, dev);
2109         if (!priv->is_lite)
2110                 free_irq(priv->irq1, dev);
2111
2112         /* Disconnect from PHY */
2113         phy_disconnect(dev->phydev);
2114
2115         clk_disable_unprepare(priv->clk);
2116
2117         return 0;
2118 }
2119
2120 static int bcm_sysport_rule_find(struct bcm_sysport_priv *priv,
2121                                  u64 location)
2122 {
2123         unsigned int index;
2124         u32 reg;
2125
2126         for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2127                 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2128                 reg >>= RXCHK_BRCM_TAG_CID_SHIFT;
2129                 reg &= RXCHK_BRCM_TAG_CID_MASK;
2130                 if (reg == location)
2131                         return index;
2132         }
2133
2134         return -EINVAL;
2135 }
2136
2137 static int bcm_sysport_rule_get(struct bcm_sysport_priv *priv,
2138                                 struct ethtool_rxnfc *nfc)
2139 {
2140         int index;
2141
2142         /* This is not a rule that we know about */
2143         index = bcm_sysport_rule_find(priv, nfc->fs.location);
2144         if (index < 0)
2145                 return -EOPNOTSUPP;
2146
2147         nfc->fs.ring_cookie = RX_CLS_FLOW_WAKE;
2148
2149         return 0;
2150 }
2151
2152 static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv,
2153                                 struct ethtool_rxnfc *nfc)
2154 {
2155         unsigned int index;
2156         u32 reg;
2157
2158         /* We cannot match locations greater than what the classification ID
2159          * permits (256 entries)
2160          */
2161         if (nfc->fs.location > RXCHK_BRCM_TAG_CID_MASK)
2162                 return -E2BIG;
2163
2164         /* We cannot support flows that are not destined for a wake-up */
2165         if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE)
2166                 return -EOPNOTSUPP;
2167
2168         index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX);
2169         if (index >= RXCHK_BRCM_TAG_MAX)
2170                 /* All filters are already in use, we cannot match more rules */
2171                 return -ENOSPC;
2172
2173         /* Location is the classification ID, and index is the position
2174          * within one of our 8 possible filters to be programmed
2175          */
2176         reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2177         reg &= ~(RXCHK_BRCM_TAG_CID_MASK << RXCHK_BRCM_TAG_CID_SHIFT);
2178         reg |= nfc->fs.location << RXCHK_BRCM_TAG_CID_SHIFT;
2179         rxchk_writel(priv, reg, RXCHK_BRCM_TAG(index));
2180         rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
2181
2182         priv->filters_loc[index] = nfc->fs.location;
2183         set_bit(index, priv->filters);
2184
2185         return 0;
2186 }
2187
2188 static int bcm_sysport_rule_del(struct bcm_sysport_priv *priv,
2189                                 u64 location)
2190 {
2191         int index;
2192
2193         /* This is not a rule that we know about */
2194         index = bcm_sysport_rule_find(priv, location);
2195         if (index < 0)
2196                 return -EOPNOTSUPP;
2197
2198         /* No need to disable this filter if it was enabled, this will
2199          * be taken care of during suspend time by bcm_sysport_suspend_to_wol
2200          */
2201         clear_bit(index, priv->filters);
2202         priv->filters_loc[index] = 0;
2203
2204         return 0;
2205 }
2206
2207 static int bcm_sysport_get_rxnfc(struct net_device *dev,
2208                                  struct ethtool_rxnfc *nfc, u32 *rule_locs)
2209 {
2210         struct bcm_sysport_priv *priv = netdev_priv(dev);
2211         int ret = -EOPNOTSUPP;
2212
2213         switch (nfc->cmd) {
2214         case ETHTOOL_GRXCLSRULE:
2215                 ret = bcm_sysport_rule_get(priv, nfc);
2216                 break;
2217         default:
2218                 break;
2219         }
2220
2221         return ret;
2222 }
2223
2224 static int bcm_sysport_set_rxnfc(struct net_device *dev,
2225                                  struct ethtool_rxnfc *nfc)
2226 {
2227         struct bcm_sysport_priv *priv = netdev_priv(dev);
2228         int ret = -EOPNOTSUPP;
2229
2230         switch (nfc->cmd) {
2231         case ETHTOOL_SRXCLSRLINS:
2232                 ret = bcm_sysport_rule_set(priv, nfc);
2233                 break;
2234         case ETHTOOL_SRXCLSRLDEL:
2235                 ret = bcm_sysport_rule_del(priv, nfc->fs.location);
2236                 break;
2237         default:
2238                 break;
2239         }
2240
2241         return ret;
2242 }
2243
2244 static const struct ethtool_ops bcm_sysport_ethtool_ops = {
2245         .supported_coalesce_params = ETHTOOL_COALESCE_USECS |
2246                                      ETHTOOL_COALESCE_MAX_FRAMES |
2247                                      ETHTOOL_COALESCE_USE_ADAPTIVE_RX,
2248         .get_drvinfo            = bcm_sysport_get_drvinfo,
2249         .get_msglevel           = bcm_sysport_get_msglvl,
2250         .set_msglevel           = bcm_sysport_set_msglvl,
2251         .get_link               = ethtool_op_get_link,
2252         .get_strings            = bcm_sysport_get_strings,
2253         .get_ethtool_stats      = bcm_sysport_get_stats,
2254         .get_sset_count         = bcm_sysport_get_sset_count,
2255         .get_wol                = bcm_sysport_get_wol,
2256         .set_wol                = bcm_sysport_set_wol,
2257         .get_coalesce           = bcm_sysport_get_coalesce,
2258         .set_coalesce           = bcm_sysport_set_coalesce,
2259         .get_link_ksettings     = phy_ethtool_get_link_ksettings,
2260         .set_link_ksettings     = phy_ethtool_set_link_ksettings,
2261         .get_rxnfc              = bcm_sysport_get_rxnfc,
2262         .set_rxnfc              = bcm_sysport_set_rxnfc,
2263 };
2264
2265 static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb,
2266                                     struct net_device *sb_dev)
2267 {
2268         struct bcm_sysport_priv *priv = netdev_priv(dev);
2269         u16 queue = skb_get_queue_mapping(skb);
2270         struct bcm_sysport_tx_ring *tx_ring;
2271         unsigned int q, port;
2272
2273         if (!netdev_uses_dsa(dev))
2274                 return netdev_pick_tx(dev, skb, NULL);
2275
2276         /* DSA tagging layer will have configured the correct queue */
2277         q = BRCM_TAG_GET_QUEUE(queue);
2278         port = BRCM_TAG_GET_PORT(queue);
2279         tx_ring = priv->ring_map[q + port * priv->per_port_num_tx_queues];
2280
2281         if (unlikely(!tx_ring))
2282                 return netdev_pick_tx(dev, skb, NULL);
2283
2284         return tx_ring->index;
2285 }
2286
2287 static const struct net_device_ops bcm_sysport_netdev_ops = {
2288         .ndo_start_xmit         = bcm_sysport_xmit,
2289         .ndo_tx_timeout         = bcm_sysport_tx_timeout,
2290         .ndo_open               = bcm_sysport_open,
2291         .ndo_stop               = bcm_sysport_stop,
2292         .ndo_set_features       = bcm_sysport_set_features,
2293         .ndo_set_rx_mode        = bcm_sysport_set_rx_mode,
2294         .ndo_set_mac_address    = bcm_sysport_change_mac,
2295 #ifdef CONFIG_NET_POLL_CONTROLLER
2296         .ndo_poll_controller    = bcm_sysport_poll_controller,
2297 #endif
2298         .ndo_get_stats64        = bcm_sysport_get_stats64,
2299         .ndo_select_queue       = bcm_sysport_select_queue,
2300 };
2301
2302 static int bcm_sysport_map_queues(struct net_device *dev,
2303                                   struct net_device *slave_dev)
2304 {
2305         struct dsa_port *dp = dsa_port_from_netdev(slave_dev);
2306         struct bcm_sysport_priv *priv = netdev_priv(dev);
2307         struct bcm_sysport_tx_ring *ring;
2308         unsigned int num_tx_queues;
2309         unsigned int q, qp, port;
2310
2311         /* We can't be setting up queue inspection for non directly attached
2312          * switches
2313          */
2314         if (dp->ds->index)
2315                 return 0;
2316
2317         port = dp->index;
2318
2319         /* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a
2320          * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of
2321          * per-port (slave_dev) network devices queue, we achieve just that.
2322          * This need to happen now before any slave network device is used such
2323          * it accurately reflects the number of real TX queues.
2324          */
2325         if (priv->is_lite)
2326                 netif_set_real_num_tx_queues(slave_dev,
2327                                              slave_dev->num_tx_queues / 2);
2328
2329         num_tx_queues = slave_dev->real_num_tx_queues;
2330
2331         if (priv->per_port_num_tx_queues &&
2332             priv->per_port_num_tx_queues != num_tx_queues)
2333                 netdev_warn(slave_dev, "asymmetric number of per-port queues\n");
2334
2335         priv->per_port_num_tx_queues = num_tx_queues;
2336
2337         for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues;
2338              q++) {
2339                 ring = &priv->tx_rings[q];
2340
2341                 if (ring->inspect)
2342                         continue;
2343
2344                 /* Just remember the mapping actual programming done
2345                  * during bcm_sysport_init_tx_ring
2346                  */
2347                 ring->switch_queue = qp;
2348                 ring->switch_port = port;
2349                 ring->inspect = true;
2350                 priv->ring_map[qp + port * num_tx_queues] = ring;
2351                 qp++;
2352         }
2353
2354         return 0;
2355 }
2356
2357 static int bcm_sysport_unmap_queues(struct net_device *dev,
2358                                     struct net_device *slave_dev)
2359 {
2360         struct dsa_port *dp = dsa_port_from_netdev(slave_dev);
2361         struct bcm_sysport_priv *priv = netdev_priv(dev);
2362         struct bcm_sysport_tx_ring *ring;
2363         unsigned int num_tx_queues;
2364         unsigned int q, qp, port;
2365
2366         port = dp->index;
2367
2368         num_tx_queues = slave_dev->real_num_tx_queues;
2369
2370         for (q = 0; q < dev->num_tx_queues; q++) {
2371                 ring = &priv->tx_rings[q];
2372
2373                 if (ring->switch_port != port)
2374                         continue;
2375
2376                 if (!ring->inspect)
2377                         continue;
2378
2379                 ring->inspect = false;
2380                 qp = ring->switch_queue;
2381                 priv->ring_map[qp + port * num_tx_queues] = NULL;
2382         }
2383
2384         return 0;
2385 }
2386
2387 static int bcm_sysport_netdevice_event(struct notifier_block *nb,
2388                                        unsigned long event, void *ptr)
2389 {
2390         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2391         struct netdev_notifier_changeupper_info *info = ptr;
2392         struct bcm_sysport_priv *priv;
2393         int ret = 0;
2394
2395         priv = container_of(nb, struct bcm_sysport_priv, netdev_notifier);
2396         if (priv->netdev != dev)
2397                 return NOTIFY_DONE;
2398
2399         switch (event) {
2400         case NETDEV_CHANGEUPPER:
2401                 if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2402                         return NOTIFY_DONE;
2403
2404                 if (!dsa_user_dev_check(info->upper_dev))
2405                         return NOTIFY_DONE;
2406
2407                 if (info->linking)
2408                         ret = bcm_sysport_map_queues(dev, info->upper_dev);
2409                 else
2410                         ret = bcm_sysport_unmap_queues(dev, info->upper_dev);
2411                 break;
2412         }
2413
2414         return notifier_from_errno(ret);
2415 }
2416
2417 #define REV_FMT "v%2x.%02x"
2418
2419 static const struct bcm_sysport_hw_params bcm_sysport_params[] = {
2420         [SYSTEMPORT] = {
2421                 .is_lite = false,
2422                 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS,
2423         },
2424         [SYSTEMPORT_LITE] = {
2425                 .is_lite = true,
2426                 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS,
2427         },
2428 };
2429
2430 static const struct of_device_id bcm_sysport_of_match[] = {
2431         { .compatible = "brcm,systemportlite-v1.00",
2432           .data = &bcm_sysport_params[SYSTEMPORT_LITE] },
2433         { .compatible = "brcm,systemport-v1.00",
2434           .data = &bcm_sysport_params[SYSTEMPORT] },
2435         { .compatible = "brcm,systemport",
2436           .data = &bcm_sysport_params[SYSTEMPORT] },
2437         { /* sentinel */ }
2438 };
2439 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
2440
2441 static int bcm_sysport_probe(struct platform_device *pdev)
2442 {
2443         const struct bcm_sysport_hw_params *params;
2444         const struct of_device_id *of_id = NULL;
2445         struct bcm_sysport_priv *priv;
2446         struct device_node *dn;
2447         struct net_device *dev;
2448         u32 txq, rxq;
2449         int ret;
2450
2451         dn = pdev->dev.of_node;
2452         of_id = of_match_node(bcm_sysport_of_match, dn);
2453         if (!of_id || !of_id->data)
2454                 return -EINVAL;
2455
2456         ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
2457         if (ret)
2458                 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2459         if (ret) {
2460                 dev_err(&pdev->dev, "unable to set DMA mask: %d\n", ret);
2461                 return ret;
2462         }
2463
2464         /* Fairly quickly we need to know the type of adapter we have */
2465         params = of_id->data;
2466
2467         /* Read the Transmit/Receive Queue properties */
2468         if (of_property_read_u32(dn, "systemport,num-txq", &txq))
2469                 txq = TDMA_NUM_RINGS;
2470         if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
2471                 rxq = 1;
2472
2473         /* Sanity check the number of transmit queues */
2474         if (!txq || txq > TDMA_NUM_RINGS)
2475                 return -EINVAL;
2476
2477         dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
2478         if (!dev)
2479                 return -ENOMEM;
2480
2481         /* Initialize private members */
2482         priv = netdev_priv(dev);
2483
2484         priv->clk = devm_clk_get_optional(&pdev->dev, "sw_sysport");
2485         if (IS_ERR(priv->clk)) {
2486                 ret = PTR_ERR(priv->clk);
2487                 goto err_free_netdev;
2488         }
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                 ret = -ENOMEM;
2496                 goto err_free_netdev;
2497         }
2498
2499         priv->is_lite = params->is_lite;
2500         priv->num_rx_desc_words = params->num_rx_desc_words;
2501
2502         priv->irq0 = platform_get_irq(pdev, 0);
2503         if (!priv->is_lite) {
2504                 priv->irq1 = platform_get_irq(pdev, 1);
2505                 priv->wol_irq = platform_get_irq_optional(pdev, 2);
2506         } else {
2507                 priv->wol_irq = platform_get_irq_optional(pdev, 1);
2508         }
2509         if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) {
2510                 ret = -EINVAL;
2511                 goto err_free_netdev;
2512         }
2513
2514         priv->base = devm_platform_ioremap_resource(pdev, 0);
2515         if (IS_ERR(priv->base)) {
2516                 ret = PTR_ERR(priv->base);
2517                 goto err_free_netdev;
2518         }
2519
2520         priv->netdev = dev;
2521         priv->pdev = pdev;
2522
2523         ret = of_get_phy_mode(dn, &priv->phy_interface);
2524         /* Default to GMII interface mode */
2525         if (ret)
2526                 priv->phy_interface = PHY_INTERFACE_MODE_GMII;
2527
2528         /* In the case of a fixed PHY, the DT node associated
2529          * to the PHY is the Ethernet MAC DT node.
2530          */
2531         if (of_phy_is_fixed_link(dn)) {
2532                 ret = of_phy_register_fixed_link(dn);
2533                 if (ret) {
2534                         dev_err(&pdev->dev, "failed to register fixed PHY\n");
2535                         goto err_free_netdev;
2536                 }
2537
2538                 priv->phy_dn = dn;
2539         }
2540
2541         /* Initialize netdevice members */
2542         ret = of_get_ethdev_address(dn, dev);
2543         if (ret) {
2544                 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
2545                 eth_hw_addr_random(dev);
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);
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         dev->max_mtu = UMAC_MAX_MTU_SIZE;
2560
2561         /* Request the WOL interrupt and advertise suspend if available */
2562         priv->wol_irq_disabled = 1;
2563         ret = devm_request_irq(&pdev->dev, priv->wol_irq,
2564                                bcm_sysport_wol_isr, 0, dev->name, priv);
2565         if (!ret)
2566                 device_set_wakeup_capable(&pdev->dev, 1);
2567
2568         priv->wol_clk = devm_clk_get_optional(&pdev->dev, "sw_sysportwol");
2569         if (IS_ERR(priv->wol_clk)) {
2570                 ret = PTR_ERR(priv->wol_clk);
2571                 goto err_deregister_fixed_link;
2572         }
2573
2574         /* Set the needed headroom once and for all */
2575         BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
2576         dev->needed_headroom += sizeof(struct bcm_tsb);
2577
2578         /* libphy will adjust the link state accordingly */
2579         netif_carrier_off(dev);
2580
2581         priv->rx_max_coalesced_frames = 1;
2582         u64_stats_init(&priv->syncp);
2583
2584         priv->netdev_notifier.notifier_call = bcm_sysport_netdevice_event;
2585
2586         ret = register_netdevice_notifier(&priv->netdev_notifier);
2587         if (ret) {
2588                 dev_err(&pdev->dev, "failed to register DSA notifier\n");
2589                 goto err_deregister_fixed_link;
2590         }
2591
2592         ret = register_netdev(dev);
2593         if (ret) {
2594                 dev_err(&pdev->dev, "failed to register net_device\n");
2595                 goto err_deregister_notifier;
2596         }
2597
2598         ret = clk_prepare_enable(priv->clk);
2599         if (ret) {
2600                 dev_err(&pdev->dev, "could not enable priv clock\n");
2601                 goto err_deregister_netdev;
2602         }
2603
2604         priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
2605         dev_info(&pdev->dev,
2606                  "Broadcom SYSTEMPORT%s " REV_FMT
2607                  " (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
2608                  priv->is_lite ? " Lite" : "",
2609                  (priv->rev >> 8) & 0xff, priv->rev & 0xff,
2610                  priv->irq0, priv->irq1, txq, rxq);
2611
2612         clk_disable_unprepare(priv->clk);
2613
2614         return 0;
2615
2616 err_deregister_netdev:
2617         unregister_netdev(dev);
2618 err_deregister_notifier:
2619         unregister_netdevice_notifier(&priv->netdev_notifier);
2620 err_deregister_fixed_link:
2621         if (of_phy_is_fixed_link(dn))
2622                 of_phy_deregister_fixed_link(dn);
2623 err_free_netdev:
2624         free_netdev(dev);
2625         return ret;
2626 }
2627
2628 static void bcm_sysport_remove(struct platform_device *pdev)
2629 {
2630         struct net_device *dev = dev_get_drvdata(&pdev->dev);
2631         struct bcm_sysport_priv *priv = netdev_priv(dev);
2632         struct device_node *dn = pdev->dev.of_node;
2633
2634         /* Not much to do, ndo_close has been called
2635          * and we use managed allocations
2636          */
2637         unregister_netdevice_notifier(&priv->netdev_notifier);
2638         unregister_netdev(dev);
2639         if (of_phy_is_fixed_link(dn))
2640                 of_phy_deregister_fixed_link(dn);
2641         free_netdev(dev);
2642         dev_set_drvdata(&pdev->dev, NULL);
2643 }
2644
2645 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
2646 {
2647         struct net_device *ndev = priv->netdev;
2648         unsigned int timeout = 1000;
2649         unsigned int index, i = 0;
2650         u32 reg;
2651
2652         reg = umac_readl(priv, UMAC_MPD_CTRL);
2653         if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE))
2654                 reg |= MPD_EN;
2655         reg &= ~PSW_EN;
2656         if (priv->wolopts & WAKE_MAGICSECURE) {
2657                 /* Program the SecureOn password */
2658                 umac_writel(priv, get_unaligned_be16(&priv->sopass[0]),
2659                             UMAC_PSW_MS);
2660                 umac_writel(priv, get_unaligned_be32(&priv->sopass[2]),
2661                             UMAC_PSW_LS);
2662                 reg |= PSW_EN;
2663         }
2664         umac_writel(priv, reg, UMAC_MPD_CTRL);
2665
2666         if (priv->wolopts & WAKE_FILTER) {
2667                 /* Turn on ACPI matching to steal packets from RBUF */
2668                 reg = rbuf_readl(priv, RBUF_CONTROL);
2669                 if (priv->is_lite)
2670                         reg |= RBUF_ACPI_EN_LITE;
2671                 else
2672                         reg |= RBUF_ACPI_EN;
2673                 rbuf_writel(priv, reg, RBUF_CONTROL);
2674
2675                 /* Enable RXCHK, active filters and Broadcom tag matching */
2676                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2677                 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
2678                          RXCHK_BRCM_TAG_MATCH_SHIFT);
2679                 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2680                         reg |= BIT(RXCHK_BRCM_TAG_MATCH_SHIFT + i);
2681                         i++;
2682                 }
2683                 reg |= RXCHK_EN | RXCHK_BRCM_TAG_EN;
2684                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2685         }
2686
2687         /* Make sure RBUF entered WoL mode as result */
2688         do {
2689                 reg = rbuf_readl(priv, RBUF_STATUS);
2690                 if (reg & RBUF_WOL_MODE)
2691                         break;
2692
2693                 udelay(10);
2694         } while (timeout-- > 0);
2695
2696         /* Do not leave the UniMAC RBUF matching only MPD packets */
2697         if (!timeout) {
2698                 mpd_enable_set(priv, false);
2699                 netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
2700                 return -ETIMEDOUT;
2701         }
2702
2703         /* UniMAC receive needs to be turned on */
2704         umac_enable_set(priv, CMD_RX_EN, 1);
2705
2706         netif_dbg(priv, wol, ndev, "entered WOL mode\n");
2707
2708         return 0;
2709 }
2710
2711 static int __maybe_unused bcm_sysport_suspend(struct device *d)
2712 {
2713         struct net_device *dev = dev_get_drvdata(d);
2714         struct bcm_sysport_priv *priv = netdev_priv(dev);
2715         unsigned int i;
2716         int ret = 0;
2717         u32 reg;
2718
2719         if (!netif_running(dev))
2720                 return 0;
2721
2722         netif_device_detach(dev);
2723
2724         bcm_sysport_netif_stop(dev);
2725
2726         phy_suspend(dev->phydev);
2727
2728         /* Disable UniMAC RX */
2729         umac_enable_set(priv, CMD_RX_EN, 0);
2730
2731         ret = rdma_enable_set(priv, 0);
2732         if (ret) {
2733                 netdev_err(dev, "RDMA timeout!\n");
2734                 return ret;
2735         }
2736
2737         /* Disable RXCHK if enabled */
2738         if (priv->rx_chk_en) {
2739                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2740                 reg &= ~RXCHK_EN;
2741                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2742         }
2743
2744         /* Flush RX pipe */
2745         if (!priv->wolopts)
2746                 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
2747
2748         ret = tdma_enable_set(priv, 0);
2749         if (ret) {
2750                 netdev_err(dev, "TDMA timeout!\n");
2751                 return ret;
2752         }
2753
2754         /* Wait for a packet boundary */
2755         usleep_range(2000, 3000);
2756
2757         umac_enable_set(priv, CMD_TX_EN, 0);
2758
2759         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
2760
2761         /* Free RX/TX rings SW structures */
2762         for (i = 0; i < dev->num_tx_queues; i++)
2763                 bcm_sysport_fini_tx_ring(priv, i);
2764         bcm_sysport_fini_rx_ring(priv);
2765
2766         /* Get prepared for Wake-on-LAN */
2767         if (device_may_wakeup(d) && priv->wolopts) {
2768                 clk_prepare_enable(priv->wol_clk);
2769                 ret = bcm_sysport_suspend_to_wol(priv);
2770         }
2771
2772         clk_disable_unprepare(priv->clk);
2773
2774         return ret;
2775 }
2776
2777 static int __maybe_unused bcm_sysport_resume(struct device *d)
2778 {
2779         struct net_device *dev = dev_get_drvdata(d);
2780         struct bcm_sysport_priv *priv = netdev_priv(dev);
2781         unsigned int i;
2782         int ret;
2783
2784         if (!netif_running(dev))
2785                 return 0;
2786
2787         ret = clk_prepare_enable(priv->clk);
2788         if (ret) {
2789                 netdev_err(dev, "could not enable priv clock\n");
2790                 return ret;
2791         }
2792
2793         if (priv->wolopts)
2794                 clk_disable_unprepare(priv->wol_clk);
2795
2796         umac_reset(priv);
2797
2798         /* Disable the UniMAC RX/TX */
2799         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
2800
2801         /* We may have been suspended and never received a WOL event that
2802          * would turn off MPD detection, take care of that now
2803          */
2804         bcm_sysport_resume_from_wol(priv);
2805
2806         /* Initialize both hardware and software ring */
2807         for (i = 0; i < dev->num_tx_queues; i++) {
2808                 ret = bcm_sysport_init_tx_ring(priv, i);
2809                 if (ret) {
2810                         netdev_err(dev, "failed to initialize TX ring %d\n",
2811                                    i);
2812                         goto out_free_tx_rings;
2813                 }
2814         }
2815
2816         /* Initialize linked-list */
2817         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2818
2819         /* Initialize RX ring */
2820         ret = bcm_sysport_init_rx_ring(priv);
2821         if (ret) {
2822                 netdev_err(dev, "failed to initialize RX ring\n");
2823                 goto out_free_rx_ring;
2824         }
2825
2826         /* RX pipe enable */
2827         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2828
2829         ret = rdma_enable_set(priv, 1);
2830         if (ret) {
2831                 netdev_err(dev, "failed to enable RDMA\n");
2832                 goto out_free_rx_ring;
2833         }
2834
2835         /* Restore enabled features */
2836         bcm_sysport_set_features(dev, dev->features);
2837
2838         rbuf_init(priv);
2839
2840         /* Set maximum frame length */
2841         if (!priv->is_lite)
2842                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2843         else
2844                 gib_set_pad_extension(priv);
2845
2846         /* Set MAC address */
2847         umac_set_hw_addr(priv, dev->dev_addr);
2848
2849         umac_enable_set(priv, CMD_RX_EN, 1);
2850
2851         /* TX pipe enable */
2852         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2853
2854         umac_enable_set(priv, CMD_TX_EN, 1);
2855
2856         ret = tdma_enable_set(priv, 1);
2857         if (ret) {
2858                 netdev_err(dev, "TDMA timeout!\n");
2859                 goto out_free_rx_ring;
2860         }
2861
2862         phy_resume(dev->phydev);
2863
2864         bcm_sysport_netif_start(dev);
2865
2866         netif_device_attach(dev);
2867
2868         return 0;
2869
2870 out_free_rx_ring:
2871         bcm_sysport_fini_rx_ring(priv);
2872 out_free_tx_rings:
2873         for (i = 0; i < dev->num_tx_queues; i++)
2874                 bcm_sysport_fini_tx_ring(priv, i);
2875         clk_disable_unprepare(priv->clk);
2876         return ret;
2877 }
2878
2879 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2880                 bcm_sysport_suspend, bcm_sysport_resume);
2881
2882 static struct platform_driver bcm_sysport_driver = {
2883         .probe  = bcm_sysport_probe,
2884         .remove = bcm_sysport_remove,
2885         .driver =  {
2886                 .name = "brcm-systemport",
2887                 .of_match_table = bcm_sysport_of_match,
2888                 .pm = &bcm_sysport_pm_ops,
2889         },
2890 };
2891 module_platform_driver(bcm_sysport_driver);
2892
2893 MODULE_AUTHOR("Broadcom Corporation");
2894 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2895 MODULE_ALIAS("platform:brcm-systemport");
2896 MODULE_LICENSE("GPL");