drivers/net/ethernet/broadcom/bcmsysport.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Broadcom BCM7xxx System Port Ethernet MAC driver
   4  *
   5  * Copyright (C) 2014 Broadcom Corporation
   6  */
   7
   8 #define pr_fmt(fmt)     KBUILD_MODNAME ": " fmt
   9
  10 #include <linux/init.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/etherdevice.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/of.h>
  18 #include <linux/of_net.h>
  19 #include <linux/of_mdio.h>
  20 #include <linux/phy.h>
  21 #include <linux/phy_fixed.h>
  22 #include <net/dsa.h>
  23 #include <linux/clk.h>
  24 #include <net/ip.h>
  25 #include <net/ipv6.h>
  26
  27 #include "bcmsysport.h"
  28
  29 /* I/O accessors register helpers */
  30 #define BCM_SYSPORT_IO_MACRO(name, offset) \
  31 static inline u32 name##_readl(struct bcm_sysport_priv *priv, u32 off)  \
  32 {                                                                       \
  33         u32 reg = readl_relaxed(priv->base + offset + off);             \
  34         return reg;                                                     \
  35 }                                                                       \
  36 static inline void name##_writel(struct bcm_sysport_priv *priv,         \
  37                                   u32 val, u32 off)                     \
  38 {                                                                       \
  39         writel_relaxed(val, priv->base + offset + off);                 \
  40 }                                                                       \
  41
  42 BCM_SYSPORT_IO_MACRO(intrl2_0, SYS_PORT_INTRL2_0_OFFSET);
  43 BCM_SYSPORT_IO_MACRO(intrl2_1, SYS_PORT_INTRL2_1_OFFSET);
  44 BCM_SYSPORT_IO_MACRO(umac, SYS_PORT_UMAC_OFFSET);
  45 BCM_SYSPORT_IO_MACRO(gib, SYS_PORT_GIB_OFFSET);
  46 BCM_SYSPORT_IO_MACRO(tdma, SYS_PORT_TDMA_OFFSET);
  47 BCM_SYSPORT_IO_MACRO(rxchk, SYS_PORT_RXCHK_OFFSET);
  48 BCM_SYSPORT_IO_MACRO(txchk, SYS_PORT_TXCHK_OFFSET);
  49 BCM_SYSPORT_IO_MACRO(rbuf, SYS_PORT_RBUF_OFFSET);
  50 BCM_SYSPORT_IO_MACRO(tbuf, SYS_PORT_TBUF_OFFSET);
  51 BCM_SYSPORT_IO_MACRO(topctrl, SYS_PORT_TOPCTRL_OFFSET);
  52
  53 /* On SYSTEMPORT Lite, any register after RDMA_STATUS has the exact
  54  * same layout, except it has been moved by 4 bytes up, *sigh*
  55  */
  56 static inline u32 rdma_readl(struct bcm_sysport_priv *priv, u32 off)
  57 {
  58         if (priv->is_lite && off >= RDMA_STATUS)
  59                 off += 4;
  60         return readl_relaxed(priv->base + SYS_PORT_RDMA_OFFSET + off);
  61 }
  62
  63 static inline void rdma_writel(struct bcm_sysport_priv *priv, u32 val, u32 off)
  64 {
  65         if (priv->is_lite && off >= RDMA_STATUS)
  66                 off += 4;
  67         writel_relaxed(val, priv->base + SYS_PORT_RDMA_OFFSET + off);
  68 }
  69
  70 static inline u32 tdma_control_bit(struct bcm_sysport_priv *priv, u32 bit)
  71 {
  72         if (!priv->is_lite) {
  73                 return BIT(bit);
  74         } else {
  75                 if (bit >= ACB_ALGO)
  76                         return BIT(bit + 1);
  77                 else
  78                         return BIT(bit);
  79         }
  80 }
  81
  82 /* L2-interrupt masking/unmasking helpers, does automatic saving of the applied
  83  * mask in a software copy to avoid CPU_MASK_STATUS reads in hot-paths.
  84   */
  85 #define BCM_SYSPORT_INTR_L2(which)      \
  86 static inline void intrl2_##which##_mask_clear(struct bcm_sysport_priv *priv, \
  87                                                 u32 mask)               \
  88 {                                                                       \
  89         priv->irq##which##_mask &= ~(mask);                             \
  90         intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR);     \
  91 }                                                                       \
  92 static inline void intrl2_##which##_mask_set(struct bcm_sysport_priv *priv, \
  93                                                 u32 mask)               \
  94 {                                                                       \
  95         intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET);      \
  96         priv->irq##which##_mask |= (mask);                              \
  97 }                                                                       \
  98
  99 BCM_SYSPORT_INTR_L2(0)
 100 BCM_SYSPORT_INTR_L2(1)
 101
 102 /* Register accesses to GISB/RBUS registers are expensive (few hundred
 103  * nanoseconds), so keep the check for 64-bits explicit here to save
 104  * one register write per-packet on 32-bits platforms.
 105  */
 106 static inline void dma_desc_set_addr(struct bcm_sysport_priv *priv,
 107                                      void __iomem *d,
 108                                      dma_addr_t addr)
 109 {
 110 #ifdef CONFIG_PHYS_ADDR_T_64BIT
 111         writel_relaxed(upper_32_bits(addr) & DESC_ADDR_HI_MASK,
 112                      d + DESC_ADDR_HI_STATUS_LEN);
 113 #endif
 114         writel_relaxed(lower_32_bits(addr), d + DESC_ADDR_LO);
 115 }
 116
 117 /* Ethtool operations */
 118 static void bcm_sysport_set_rx_csum(struct net_device *dev,
 119                                     netdev_features_t wanted)
 120 {
 121         struct bcm_sysport_priv *priv = netdev_priv(dev);
 122         u32 reg;
 123
 124         priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM);
 125         reg = rxchk_readl(priv, RXCHK_CONTROL);
 126         /* Clear L2 header checks, which would prevent BPDUs
 127          * from being received.
 128          */
 129         reg &= ~RXCHK_L2_HDR_DIS;
 130         if (priv->rx_chk_en)
 131                 reg |= RXCHK_EN;
 132         else
 133                 reg &= ~RXCHK_EN;
 134
 135         /* If UniMAC forwards CRC, we need to skip over it to get
 136          * a valid CHK bit to be set in the per-packet status word
 137          */
 138         if (priv->rx_chk_en && priv->crc_fwd)
 139                 reg |= RXCHK_SKIP_FCS;
 140         else
 141                 reg &= ~RXCHK_SKIP_FCS;
 142
 143         /* If Broadcom tags are enabled (e.g: using a switch), make
 144          * sure we tell the RXCHK hardware to expect a 4-bytes Broadcom
 145          * tag after the Ethernet MAC Source Address.
 146          */
 147         if (netdev_uses_dsa(dev))
 148                 reg |= RXCHK_BRCM_TAG_EN;
 149         else
 150                 reg &= ~RXCHK_BRCM_TAG_EN;
 151
 152         rxchk_writel(priv, reg, RXCHK_CONTROL);
 153 }
 154
 155 static void bcm_sysport_set_tx_csum(struct net_device *dev,
 156                                     netdev_features_t wanted)
 157 {
 158         struct bcm_sysport_priv *priv = netdev_priv(dev);
 159         u32 reg;
 160
 161         /* Hardware transmit checksum requires us to enable the Transmit status
 162          * block prepended to the packet contents
 163          */
 164         priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
 165                                     NETIF_F_HW_VLAN_CTAG_TX));
 166         reg = tdma_readl(priv, TDMA_CONTROL);
 167         if (priv->tsb_en)
 168                 reg |= tdma_control_bit(priv, TSB_EN);
 169         else
 170                 reg &= ~tdma_control_bit(priv, TSB_EN);
 171         /* Indicating that software inserts Broadcom tags is needed for the TX
 172          * checksum to be computed correctly when using VLAN HW acceleration,
 173          * else it has no effect, so it can always be turned on.
 174          */
 175         if (netdev_uses_dsa(dev))
 176                 reg |= tdma_control_bit(priv, SW_BRCM_TAG);
 177         else
 178                 reg &= ~tdma_control_bit(priv, SW_BRCM_TAG);
 179         tdma_writel(priv, reg, TDMA_CONTROL);
 180
 181         /* Default TPID is ETH_P_8021AD, change to ETH_P_8021Q */
 182         if (wanted & NETIF_F_HW_VLAN_CTAG_TX)
 183                 tdma_writel(priv, ETH_P_8021Q, TDMA_TPID);
 184 }
 185
 186 static int bcm_sysport_set_features(struct net_device *dev,
 187                                     netdev_features_t features)
 188 {
 189         struct bcm_sysport_priv *priv = netdev_priv(dev);
 190         int ret;
 191
 192         ret = clk_prepare_enable(priv->clk);
 193         if (ret)
 194                 return ret;
 195
 196         /* Read CRC forward */
 197         if (!priv->is_lite)
 198                 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
 199         else
 200                 priv->crc_fwd = !((gib_readl(priv, GIB_CONTROL) &
 201                                   GIB_FCS_STRIP) >> GIB_FCS_STRIP_SHIFT);
 202
 203         bcm_sysport_set_rx_csum(dev, features);
 204         bcm_sysport_set_tx_csum(dev, features);
 205
 206         clk_disable_unprepare(priv->clk);
 207
 208         return 0;
 209 }
 210
 211 /* Hardware counters must be kept in sync because the order/offset
 212  * is important here (order in structure declaration = order in hardware)
 213  */
 214 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = {
 215         /* general stats */
 216         STAT_NETDEV64(rx_packets),
 217         STAT_NETDEV64(tx_packets),
 218         STAT_NETDEV64(rx_bytes),
 219         STAT_NETDEV64(tx_bytes),
 220         STAT_NETDEV(rx_errors),
 221         STAT_NETDEV(tx_errors),
 222         STAT_NETDEV(rx_dropped),
 223         STAT_NETDEV(tx_dropped),
 224         STAT_NETDEV(multicast),
 225         /* UniMAC RSV counters */
 226         STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
 227         STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
 228         STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
 229         STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
 230         STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
 231         STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
 232         STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
 233         STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
 234         STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
 235         STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
 236         STAT_MIB_RX("rx_pkts", mib.rx.pkt),
 237         STAT_MIB_RX("rx_bytes", mib.rx.bytes),
 238         STAT_MIB_RX("rx_multicast", mib.rx.mca),
 239         STAT_MIB_RX("rx_broadcast", mib.rx.bca),
 240         STAT_MIB_RX("rx_fcs", mib.rx.fcs),
 241         STAT_MIB_RX("rx_control", mib.rx.cf),
 242         STAT_MIB_RX("rx_pause", mib.rx.pf),
 243         STAT_MIB_RX("rx_unknown", mib.rx.uo),
 244         STAT_MIB_RX("rx_align", mib.rx.aln),
 245         STAT_MIB_RX("rx_outrange", mib.rx.flr),
 246         STAT_MIB_RX("rx_code", mib.rx.cde),
 247         STAT_MIB_RX("rx_carrier", mib.rx.fcr),
 248         STAT_MIB_RX("rx_oversize", mib.rx.ovr),
 249         STAT_MIB_RX("rx_jabber", mib.rx.jbr),
 250         STAT_MIB_RX("rx_mtu_err", mib.rx.mtue),
 251         STAT_MIB_RX("rx_good_pkts", mib.rx.pok),
 252         STAT_MIB_RX("rx_unicast", mib.rx.uc),
 253         STAT_MIB_RX("rx_ppp", mib.rx.ppp),
 254         STAT_MIB_RX("rx_crc", mib.rx.rcrc),
 255         /* UniMAC TSV counters */
 256         STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
 257         STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
 258         STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
 259         STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
 260         STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
 261         STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
 262         STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
 263         STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
 264         STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
 265         STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
 266         STAT_MIB_TX("tx_pkts", mib.tx.pkts),
 267         STAT_MIB_TX("tx_multicast", mib.tx.mca),
 268         STAT_MIB_TX("tx_broadcast", mib.tx.bca),
 269         STAT_MIB_TX("tx_pause", mib.tx.pf),
 270         STAT_MIB_TX("tx_control", mib.tx.cf),
 271         STAT_MIB_TX("tx_fcs_err", mib.tx.fcs),
 272         STAT_MIB_TX("tx_oversize", mib.tx.ovr),
 273         STAT_MIB_TX("tx_defer", mib.tx.drf),
 274         STAT_MIB_TX("tx_excess_defer", mib.tx.edf),
 275         STAT_MIB_TX("tx_single_col", mib.tx.scl),
 276         STAT_MIB_TX("tx_multi_col", mib.tx.mcl),
 277         STAT_MIB_TX("tx_late_col", mib.tx.lcl),
 278         STAT_MIB_TX("tx_excess_col", mib.tx.ecl),
 279         STAT_MIB_TX("tx_frags", mib.tx.frg),
 280         STAT_MIB_TX("tx_total_col", mib.tx.ncl),
 281         STAT_MIB_TX("tx_jabber", mib.tx.jbr),
 282         STAT_MIB_TX("tx_bytes", mib.tx.bytes),
 283         STAT_MIB_TX("tx_good_pkts", mib.tx.pok),
 284         STAT_MIB_TX("tx_unicast", mib.tx.uc),
 285         /* UniMAC RUNT counters */
 286         STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
 287         STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
 288         STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
 289         STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
 290         /* RXCHK misc statistics */
 291         STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR),
 292         STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc,
 293                    RXCHK_OTHER_DISC_CNTR),
 294         /* RBUF misc statistics */
 295         STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR),
 296         STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR),
 297         STAT_MIB_SOFT("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
 298         STAT_MIB_SOFT("rx_dma_failed", mib.rx_dma_failed),
 299         STAT_MIB_SOFT("tx_dma_failed", mib.tx_dma_failed),
 300         STAT_MIB_SOFT("tx_realloc_tsb", mib.tx_realloc_tsb),
 301         STAT_MIB_SOFT("tx_realloc_tsb_failed", mib.tx_realloc_tsb_failed),
 302         /* Per TX-queue statistics are dynamically appended */
 303 };
 304
 305 #define BCM_SYSPORT_STATS_LEN   ARRAY_SIZE(bcm_sysport_gstrings_stats)
 306
 307 static void bcm_sysport_get_drvinfo(struct net_device *dev,
 308                                     struct ethtool_drvinfo *info)
 309 {
 310         strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
 311         strlcpy(info->bus_info, "platform", sizeof(info->bus_info));
 312 }
 313
 314 static u32 bcm_sysport_get_msglvl(struct net_device *dev)
 315 {
 316         struct bcm_sysport_priv *priv = netdev_priv(dev);
 317
 318         return priv->msg_enable;
 319 }
 320
 321 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
 322 {
 323         struct bcm_sysport_priv *priv = netdev_priv(dev);
 324
 325         priv->msg_enable = enable;
 326 }
 327
 328 static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type)
 329 {
 330         switch (type) {
 331         case BCM_SYSPORT_STAT_NETDEV:
 332         case BCM_SYSPORT_STAT_NETDEV64:
 333         case BCM_SYSPORT_STAT_RXCHK:
 334         case BCM_SYSPORT_STAT_RBUF:
 335         case BCM_SYSPORT_STAT_SOFT:
 336                 return true;
 337         default:
 338                 return false;
 339         }
 340 }
 341
 342 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set)
 343 {
 344         struct bcm_sysport_priv *priv = netdev_priv(dev);
 345         const struct bcm_sysport_stats *s;
 346         unsigned int i, j;
 347
 348         switch (string_set) {
 349         case ETH_SS_STATS:
 350                 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 351                         s = &bcm_sysport_gstrings_stats[i];
 352                         if (priv->is_lite &&
 353                             !bcm_sysport_lite_stat_valid(s->type))
 354                                 continue;
 355                         j++;
 356                 }
 357                 /* Include per-queue statistics */
 358                 return j + dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
 359         default:
 360                 return -EOPNOTSUPP;
 361         }
 362 }
 363
 364 static void bcm_sysport_get_strings(struct net_device *dev,
 365                                     u32 stringset, u8 *data)
 366 {
 367         struct bcm_sysport_priv *priv = netdev_priv(dev);
 368         const struct bcm_sysport_stats *s;
 369         char buf[128];
 370         int i, j;
 371
 372         switch (stringset) {
 373         case ETH_SS_STATS:
 374                 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 375                         s = &bcm_sysport_gstrings_stats[i];
 376                         if (priv->is_lite &&
 377                             !bcm_sysport_lite_stat_valid(s->type))
 378                                 continue;
 379
 380                         memcpy(data + j * ETH_GSTRING_LEN, s->stat_string,
 381                                ETH_GSTRING_LEN);
 382                         j++;
 383                 }
 384
 385                 for (i = 0; i < dev->num_tx_queues; i++) {
 386                         snprintf(buf, sizeof(buf), "txq%d_packets", i);
 387                         memcpy(data + j * ETH_GSTRING_LEN, buf,
 388                                ETH_GSTRING_LEN);
 389                         j++;
 390
 391                         snprintf(buf, sizeof(buf), "txq%d_bytes", i);
 392                         memcpy(data + j * ETH_GSTRING_LEN, buf,
 393                                ETH_GSTRING_LEN);
 394                         j++;
 395                 }
 396                 break;
 397         default:
 398                 break;
 399         }
 400 }
 401
 402 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
 403 {
 404         int i, j = 0;
 405
 406         for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 407                 const struct bcm_sysport_stats *s;
 408                 u8 offset = 0;
 409                 u32 val = 0;
 410                 char *p;
 411
 412                 s = &bcm_sysport_gstrings_stats[i];
 413                 switch (s->type) {
 414                 case BCM_SYSPORT_STAT_NETDEV:
 415                 case BCM_SYSPORT_STAT_NETDEV64:
 416                 case BCM_SYSPORT_STAT_SOFT:
 417                         continue;
 418                 case BCM_SYSPORT_STAT_MIB_RX:
 419                 case BCM_SYSPORT_STAT_MIB_TX:
 420                 case BCM_SYSPORT_STAT_RUNT:
 421                         if (priv->is_lite)
 422                                 continue;
 423
 424                         if (s->type != BCM_SYSPORT_STAT_MIB_RX)
 425                                 offset = UMAC_MIB_STAT_OFFSET;
 426                         val = umac_readl(priv, UMAC_MIB_START + j + offset);
 427                         break;
 428                 case BCM_SYSPORT_STAT_RXCHK:
 429                         val = rxchk_readl(priv, s->reg_offset);
 430                         if (val == ~0)
 431                                 rxchk_writel(priv, 0, s->reg_offset);
 432                         break;
 433                 case BCM_SYSPORT_STAT_RBUF:
 434                         val = rbuf_readl(priv, s->reg_offset);
 435                         if (val == ~0)
 436                                 rbuf_writel(priv, 0, s->reg_offset);
 437                         break;
 438                 }
 439
 440                 j += s->stat_sizeof;
 441                 p = (char *)priv + s->stat_offset;
 442                 *(u32 *)p = val;
 443         }
 444
 445         netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
 446 }
 447
 448 static void bcm_sysport_update_tx_stats(struct bcm_sysport_priv *priv,
 449                                         u64 *tx_bytes, u64 *tx_packets)
 450 {
 451         struct bcm_sysport_tx_ring *ring;
 452         u64 bytes = 0, packets = 0;
 453         unsigned int start;
 454         unsigned int q;
 455
 456         for (q = 0; q < priv->netdev->num_tx_queues; q++) {
 457                 ring = &priv->tx_rings[q];
 458                 do {
 459                         start = u64_stats_fetch_begin_irq(&priv->syncp);
 460                         bytes = ring->bytes;
 461                         packets = ring->packets;
 462                 } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
 463
 464                 *tx_bytes += bytes;
 465                 *tx_packets += packets;
 466         }
 467 }
 468
 469 static void bcm_sysport_get_stats(struct net_device *dev,
 470                                   struct ethtool_stats *stats, u64 *data)
 471 {
 472         struct bcm_sysport_priv *priv = netdev_priv(dev);
 473         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
 474         struct u64_stats_sync *syncp = &priv->syncp;
 475         struct bcm_sysport_tx_ring *ring;
 476         u64 tx_bytes = 0, tx_packets = 0;
 477         unsigned int start;
 478         int i, j;
 479
 480         if (netif_running(dev)) {
 481                 bcm_sysport_update_mib_counters(priv);
 482                 bcm_sysport_update_tx_stats(priv, &tx_bytes, &tx_packets);
 483                 stats64->tx_bytes = tx_bytes;
 484                 stats64->tx_packets = tx_packets;
 485         }
 486
 487         for (i =  0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
 488                 const struct bcm_sysport_stats *s;
 489                 char *p;
 490
 491                 s = &bcm_sysport_gstrings_stats[i];
 492                 if (s->type == BCM_SYSPORT_STAT_NETDEV)
 493                         p = (char *)&dev->stats;
 494                 else if (s->type == BCM_SYSPORT_STAT_NETDEV64)
 495                         p = (char *)stats64;
 496                 else
 497                         p = (char *)priv;
 498
 499                 if (priv->is_lite && !bcm_sysport_lite_stat_valid(s->type))
 500                         continue;
 501                 p += s->stat_offset;
 502
 503                 if (s->stat_sizeof == sizeof(u64) &&
 504                     s->type == BCM_SYSPORT_STAT_NETDEV64) {
 505                         do {
 506                                 start = u64_stats_fetch_begin_irq(syncp);
 507                                 data[i] = *(u64 *)p;
 508                         } while (u64_stats_fetch_retry_irq(syncp, start));
 509                 } else
 510                         data[i] = *(u32 *)p;
 511                 j++;
 512         }
 513
 514         /* For SYSTEMPORT Lite since we have holes in our statistics, j would
 515          * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it
 516          * needs to point to how many total statistics we have minus the
 517          * number of per TX queue statistics
 518          */
 519         j = bcm_sysport_get_sset_count(dev, ETH_SS_STATS) -
 520             dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
 521
 522         for (i = 0; i < dev->num_tx_queues; i++) {
 523                 ring = &priv->tx_rings[i];
 524                 data[j] = ring->packets;
 525                 j++;
 526                 data[j] = ring->bytes;
 527                 j++;
 528         }
 529 }
 530
 531 static void bcm_sysport_get_wol(struct net_device *dev,
 532                                 struct ethtool_wolinfo *wol)
 533 {
 534         struct bcm_sysport_priv *priv = netdev_priv(dev);
 535
 536         wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
 537         wol->wolopts = priv->wolopts;
 538
 539         if (!(priv->wolopts & WAKE_MAGICSECURE))
 540                 return;
 541
 542         memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass));
 543 }
 544
 545 static int bcm_sysport_set_wol(struct net_device *dev,
 546                                struct ethtool_wolinfo *wol)
 547 {
 548         struct bcm_sysport_priv *priv = netdev_priv(dev);
 549         struct device *kdev = &priv->pdev->dev;
 550         u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
 551
 552         if (!device_can_wakeup(kdev))
 553                 return -ENOTSUPP;
 554
 555         if (wol->wolopts & ~supported)
 556                 return -EINVAL;
 557
 558         if (wol->wolopts & WAKE_MAGICSECURE)
 559                 memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass));
 560
 561         /* Flag the device and relevant IRQ as wakeup capable */
 562         if (wol->wolopts) {
 563                 device_set_wakeup_enable(kdev, 1);
 564                 if (priv->wol_irq_disabled)
 565                         enable_irq_wake(priv->wol_irq);
 566                 priv->wol_irq_disabled = 0;
 567         } else {
 568                 device_set_wakeup_enable(kdev, 0);
 569                 /* Avoid unbalanced disable_irq_wake calls */
 570                 if (!priv->wol_irq_disabled)
 571                         disable_irq_wake(priv->wol_irq);
 572                 priv->wol_irq_disabled = 1;
 573         }
 574
 575         priv->wolopts = wol->wolopts;
 576
 577         return 0;
 578 }
 579
 580 static void bcm_sysport_set_rx_coalesce(struct bcm_sysport_priv *priv,
 581                                         u32 usecs, u32 pkts)
 582 {
 583         u32 reg;
 584
 585         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 586         reg &= ~(RDMA_INTR_THRESH_MASK |
 587                  RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT);
 588         reg |= pkts;
 589         reg |= DIV_ROUND_UP(usecs * 1000, 8192) << RDMA_TIMEOUT_SHIFT;
 590         rdma_writel(priv, reg, RDMA_MBDONE_INTR);
 591 }
 592
 593 static void bcm_sysport_set_tx_coalesce(struct bcm_sysport_tx_ring *ring,
 594                                         struct ethtool_coalesce *ec)
 595 {
 596         struct bcm_sysport_priv *priv = ring->priv;
 597         u32 reg;
 598
 599         reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(ring->index));
 600         reg &= ~(RING_INTR_THRESH_MASK |
 601                  RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT);
 602         reg |= ec->tx_max_coalesced_frames;
 603         reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) <<
 604                             RING_TIMEOUT_SHIFT;
 605         tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(ring->index));
 606 }
 607
 608 static int bcm_sysport_get_coalesce(struct net_device *dev,
 609                                     struct ethtool_coalesce *ec)
 610 {
 611         struct bcm_sysport_priv *priv = netdev_priv(dev);
 612         u32 reg;
 613
 614         reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0));
 615
 616         ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000;
 617         ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK;
 618
 619         reg = rdma_readl(priv, RDMA_MBDONE_INTR);
 620
 621         ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000;
 622         ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK;
 623         ec->use_adaptive_rx_coalesce = priv->dim.use_dim;
 624
 625         return 0;
 626 }
 627
 628 static int bcm_sysport_set_coalesce(struct net_device *dev,
 629                                     struct ethtool_coalesce *ec)
 630 {
 631         struct bcm_sysport_priv *priv = netdev_priv(dev);
 632         struct dim_cq_moder moder;
 633         u32 usecs, pkts;
 634         unsigned int i;
 635
 636         /* Base system clock is 125Mhz, DMA timeout is this reference clock
 637          * divided by 1024, which yield roughly 8.192 us, our maximum value has
 638          * to fit in the RING_TIMEOUT_MASK (16 bits).
 639          */
 640         if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
 641             ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
 642             ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
 643             ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
 644                 return -EINVAL;
 645
 646         if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
 647             (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0))
 648                 return -EINVAL;
 649
 650         for (i = 0; i < dev->num_tx_queues; i++)
 651                 bcm_sysport_set_tx_coalesce(&priv->tx_rings[i], ec);
 652
 653         priv->rx_coalesce_usecs = ec->rx_coalesce_usecs;
 654         priv->rx_max_coalesced_frames = ec->rx_max_coalesced_frames;
 655         usecs = priv->rx_coalesce_usecs;
 656         pkts = priv->rx_max_coalesced_frames;
 657
 658         if (ec->use_adaptive_rx_coalesce && !priv->dim.use_dim) {
 659                 moder = net_dim_get_def_rx_moderation(priv->dim.dim.mode);
 660                 usecs = moder.usec;
 661                 pkts = moder.pkts;
 662         }
 663
 664         priv->dim.use_dim = ec->use_adaptive_rx_coalesce;
 665
 666         /* Apply desired coalescing parameters */
 667         bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
 668
 669         return 0;
 670 }
 671
 672 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
 673 {
 674         dev_consume_skb_any(cb->skb);
 675         cb->skb = NULL;
 676         dma_unmap_addr_set(cb, dma_addr, 0);
 677 }
 678
 679 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
 680                                              struct bcm_sysport_cb *cb)
 681 {
 682         struct device *kdev = &priv->pdev->dev;
 683         struct net_device *ndev = priv->netdev;
 684         struct sk_buff *skb, *rx_skb;
 685         dma_addr_t mapping;
 686
 687         /* Allocate a new SKB for a new packet */
 688         skb = __netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH,
 689                                  GFP_ATOMIC | __GFP_NOWARN);
 690         if (!skb) {
 691                 priv->mib.alloc_rx_buff_failed++;
 692                 netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
 693                 return NULL;
 694         }
 695
 696         mapping = dma_map_single(kdev, skb->data,
 697                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 698         if (dma_mapping_error(kdev, mapping)) {
 699                 priv->mib.rx_dma_failed++;
 700                 dev_kfree_skb_any(skb);
 701                 netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
 702                 return NULL;
 703         }
 704
 705         /* Grab the current SKB on the ring */
 706         rx_skb = cb->skb;
 707         if (likely(rx_skb))
 708                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 709                                  RX_BUF_LENGTH, DMA_FROM_DEVICE);
 710
 711         /* Put the new SKB on the ring */
 712         cb->skb = skb;
 713         dma_unmap_addr_set(cb, dma_addr, mapping);
 714         dma_desc_set_addr(priv, cb->bd_addr, mapping);
 715
 716         netif_dbg(priv, rx_status, ndev, "RX refill\n");
 717
 718         /* Return the current SKB to the caller */
 719         return rx_skb;
 720 }
 721
 722 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
 723 {
 724         struct bcm_sysport_cb *cb;
 725         struct sk_buff *skb;
 726         unsigned int i;
 727
 728         for (i = 0; i < priv->num_rx_bds; i++) {
 729                 cb = &priv->rx_cbs[i];
 730                 skb = bcm_sysport_rx_refill(priv, cb);
 731                 dev_kfree_skb(skb);
 732                 if (!cb->skb)
 733                         return -ENOMEM;
 734         }
 735
 736         return 0;
 737 }
 738
 739 /* Poll the hardware for up to budget packets to process */
 740 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
 741                                         unsigned int budget)
 742 {
 743         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
 744         struct net_device *ndev = priv->netdev;
 745         unsigned int processed = 0, to_process;
 746         unsigned int processed_bytes = 0;
 747         struct bcm_sysport_cb *cb;
 748         struct sk_buff *skb;
 749         unsigned int p_index;
 750         u16 len, status;
 751         struct bcm_rsb *rsb;
 752
 753         /* Clear status before servicing to reduce spurious interrupts */
 754         intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR);
 755
 756         /* Determine how much we should process since last call, SYSTEMPORT Lite
 757          * groups the producer and consumer indexes into the same 32-bit
 758          * which we access using RDMA_CONS_INDEX
 759          */
 760         if (!priv->is_lite)
 761                 p_index = rdma_readl(priv, RDMA_PROD_INDEX);
 762         else
 763                 p_index = rdma_readl(priv, RDMA_CONS_INDEX);
 764         p_index &= RDMA_PROD_INDEX_MASK;
 765
 766         to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK;
 767
 768         netif_dbg(priv, rx_status, ndev,
 769                   "p_index=%d rx_c_index=%d to_process=%d\n",
 770                   p_index, priv->rx_c_index, to_process);
 771
 772         while ((processed < to_process) && (processed < budget)) {
 773                 cb = &priv->rx_cbs[priv->rx_read_ptr];
 774                 skb = bcm_sysport_rx_refill(priv, cb);
 775
 776
 777                 /* We do not have a backing SKB, so we do not a corresponding
 778                  * DMA mapping for this incoming packet since
 779                  * bcm_sysport_rx_refill always either has both skb and mapping
 780                  * or none.
 781                  */
 782                 if (unlikely(!skb)) {
 783                         netif_err(priv, rx_err, ndev, "out of memory!\n");
 784                         ndev->stats.rx_dropped++;
 785                         ndev->stats.rx_errors++;
 786                         goto next;
 787                 }
 788
 789                 /* Extract the Receive Status Block prepended */
 790                 rsb = (struct bcm_rsb *)skb->data;
 791                 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
 792                 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
 793                           DESC_STATUS_MASK;
 794
 795                 netif_dbg(priv, rx_status, ndev,
 796                           "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
 797                           p_index, priv->rx_c_index, priv->rx_read_ptr,
 798                           len, status);
 799
 800                 if (unlikely(len > RX_BUF_LENGTH)) {
 801                         netif_err(priv, rx_status, ndev, "oversized packet\n");
 802                         ndev->stats.rx_length_errors++;
 803                         ndev->stats.rx_errors++;
 804                         dev_kfree_skb_any(skb);
 805                         goto next;
 806                 }
 807
 808                 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
 809                         netif_err(priv, rx_status, ndev, "fragmented packet!\n");
 810                         ndev->stats.rx_dropped++;
 811                         ndev->stats.rx_errors++;
 812                         dev_kfree_skb_any(skb);
 813                         goto next;
 814                 }
 815
 816                 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
 817                         netif_err(priv, rx_err, ndev, "error packet\n");
 818                         if (status & RX_STATUS_OVFLOW)
 819                                 ndev->stats.rx_over_errors++;
 820                         ndev->stats.rx_dropped++;
 821                         ndev->stats.rx_errors++;
 822                         dev_kfree_skb_any(skb);
 823                         goto next;
 824                 }
 825
 826                 skb_put(skb, len);
 827
 828                 /* Hardware validated our checksum */
 829                 if (likely(status & DESC_L4_CSUM))
 830                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 831
 832                 /* Hardware pre-pends packets with 2bytes before Ethernet
 833                  * header plus we have the Receive Status Block, strip off all
 834                  * of this from the SKB.
 835                  */
 836                 skb_pull(skb, sizeof(*rsb) + 2);
 837                 len -= (sizeof(*rsb) + 2);
 838                 processed_bytes += len;
 839
 840                 /* UniMAC may forward CRC */
 841                 if (priv->crc_fwd) {
 842                         skb_trim(skb, len - ETH_FCS_LEN);
 843                         len -= ETH_FCS_LEN;
 844                 }
 845
 846                 skb->protocol = eth_type_trans(skb, ndev);
 847                 ndev->stats.rx_packets++;
 848                 ndev->stats.rx_bytes += len;
 849                 u64_stats_update_begin(&priv->syncp);
 850                 stats64->rx_packets++;
 851                 stats64->rx_bytes += len;
 852                 u64_stats_update_end(&priv->syncp);
 853
 854                 napi_gro_receive(&priv->napi, skb);
 855 next:
 856                 processed++;
 857                 priv->rx_read_ptr++;
 858
 859                 if (priv->rx_read_ptr == priv->num_rx_bds)
 860                         priv->rx_read_ptr = 0;
 861         }
 862
 863         priv->dim.packets = processed;
 864         priv->dim.bytes = processed_bytes;
 865
 866         return processed;
 867 }
 868
 869 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring,
 870                                        struct bcm_sysport_cb *cb,
 871                                        unsigned int *bytes_compl,
 872                                        unsigned int *pkts_compl)
 873 {
 874         struct bcm_sysport_priv *priv = ring->priv;
 875         struct device *kdev = &priv->pdev->dev;
 876
 877         if (cb->skb) {
 878                 *bytes_compl += cb->skb->len;
 879                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
 880                                  dma_unmap_len(cb, dma_len),
 881                                  DMA_TO_DEVICE);
 882                 (*pkts_compl)++;
 883                 bcm_sysport_free_cb(cb);
 884         /* SKB fragment */
 885         } else if (dma_unmap_addr(cb, dma_addr)) {
 886                 *bytes_compl += dma_unmap_len(cb, dma_len);
 887                 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
 888                                dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
 889                 dma_unmap_addr_set(cb, dma_addr, 0);
 890         }
 891 }
 892
 893 /* Reclaim queued SKBs for transmission completion, lockless version */
 894 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 895                                              struct bcm_sysport_tx_ring *ring)
 896 {
 897         unsigned int pkts_compl = 0, bytes_compl = 0;
 898         struct net_device *ndev = priv->netdev;
 899         unsigned int txbds_processed = 0;
 900         struct bcm_sysport_cb *cb;
 901         unsigned int txbds_ready;
 902         unsigned int c_index;
 903         u32 hw_ind;
 904
 905         /* Clear status before servicing to reduce spurious interrupts */
 906         if (!ring->priv->is_lite)
 907                 intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR);
 908         else
 909                 intrl2_0_writel(ring->priv, BIT(ring->index +
 910                                 INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR);
 911
 912         /* Compute how many descriptors have been processed since last call */
 913         hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
 914         c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
 915         txbds_ready = (c_index - ring->c_index) & RING_CONS_INDEX_MASK;
 916
 917         netif_dbg(priv, tx_done, ndev,
 918                   "ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
 919                   ring->index, ring->c_index, c_index, txbds_ready);
 920
 921         while (txbds_processed < txbds_ready) {
 922                 cb = &ring->cbs[ring->clean_index];
 923                 bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl);
 924
 925                 ring->desc_count++;
 926                 txbds_processed++;
 927
 928                 if (likely(ring->clean_index < ring->size - 1))
 929                         ring->clean_index++;
 930                 else
 931                         ring->clean_index = 0;
 932         }
 933
 934         u64_stats_update_begin(&priv->syncp);
 935         ring->packets += pkts_compl;
 936         ring->bytes += bytes_compl;
 937         u64_stats_update_end(&priv->syncp);
 938
 939         ring->c_index = c_index;
 940
 941         netif_dbg(priv, tx_done, ndev,
 942                   "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
 943                   ring->index, ring->c_index, pkts_compl, bytes_compl);
 944
 945         return pkts_compl;
 946 }
 947
 948 /* Locked version of the per-ring TX reclaim routine */
 949 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
 950                                            struct bcm_sysport_tx_ring *ring)
 951 {
 952         struct netdev_queue *txq;
 953         unsigned int released;
 954         unsigned long flags;
 955
 956         txq = netdev_get_tx_queue(priv->netdev, ring->index);
 957
 958         spin_lock_irqsave(&ring->lock, flags);
 959         released = __bcm_sysport_tx_reclaim(priv, ring);
 960         if (released)
 961                 netif_tx_wake_queue(txq);
 962
 963         spin_unlock_irqrestore(&ring->lock, flags);
 964
 965         return released;
 966 }
 967
 968 /* Locked version of the per-ring TX reclaim, but does not wake the queue */
 969 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv,
 970                                  struct bcm_sysport_tx_ring *ring)
 971 {
 972         unsigned long flags;
 973
 974         spin_lock_irqsave(&ring->lock, flags);
 975         __bcm_sysport_tx_reclaim(priv, ring);
 976         spin_unlock_irqrestore(&ring->lock, flags);
 977 }
 978
 979 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
 980 {
 981         struct bcm_sysport_tx_ring *ring =
 982                 container_of(napi, struct bcm_sysport_tx_ring, napi);
 983         unsigned int work_done = 0;
 984
 985         work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
 986
 987         if (work_done == 0) {
 988                 napi_complete(napi);
 989                 /* re-enable TX interrupt */
 990                 if (!ring->priv->is_lite)
 991                         intrl2_1_mask_clear(ring->priv, BIT(ring->index));
 992                 else
 993                         intrl2_0_mask_clear(ring->priv, BIT(ring->index +
 994                                             INTRL2_0_TDMA_MBDONE_SHIFT));
 995
 996                 return 0;
 997         }
 998
 999         return budget;
1000 }
1001
1002 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
1003 {
1004         unsigned int q;
1005
1006         for (q = 0; q < priv->netdev->num_tx_queues; q++)
1007                 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
1008 }
1009
1010 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
1011 {
1012         struct bcm_sysport_priv *priv =
1013                 container_of(napi, struct bcm_sysport_priv, napi);
1014         struct dim_sample dim_sample = {};
1015         unsigned int work_done = 0;
1016
1017         work_done = bcm_sysport_desc_rx(priv, budget);
1018
1019         priv->rx_c_index += work_done;
1020         priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
1021
1022         /* SYSTEMPORT Lite groups the producer/consumer index, producer is
1023          * maintained by HW, but writes to it will be ignore while RDMA
1024          * is active
1025          */
1026         if (!priv->is_lite)
1027                 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
1028         else
1029                 rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX);
1030
1031         if (work_done < budget) {
1032                 napi_complete_done(napi, work_done);
1033                 /* re-enable RX interrupts */
1034                 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
1035         }
1036
1037         if (priv->dim.use_dim) {
1038                 dim_update_sample(priv->dim.event_ctr, priv->dim.packets,
1039                                   priv->dim.bytes, &dim_sample);
1040                 net_dim(&priv->dim.dim, dim_sample);
1041         }
1042
1043         return work_done;
1044 }
1045
1046 static void mpd_enable_set(struct bcm_sysport_priv *priv, bool enable)
1047 {
1048         u32 reg, bit;
1049
1050         reg = umac_readl(priv, UMAC_MPD_CTRL);
1051         if (enable)
1052                 reg |= MPD_EN;
1053         else
1054                 reg &= ~MPD_EN;
1055         umac_writel(priv, reg, UMAC_MPD_CTRL);
1056
1057         if (priv->is_lite)
1058                 bit = RBUF_ACPI_EN_LITE;
1059         else
1060                 bit = RBUF_ACPI_EN;
1061
1062         reg = rbuf_readl(priv, RBUF_CONTROL);
1063         if (enable)
1064                 reg |= bit;
1065         else
1066                 reg &= ~bit;
1067         rbuf_writel(priv, reg, RBUF_CONTROL);
1068 }
1069
1070 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
1071 {
1072         unsigned int index;
1073         u32 reg;
1074
1075         /* Disable RXCHK, active filters and Broadcom tag matching */
1076         reg = rxchk_readl(priv, RXCHK_CONTROL);
1077         reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
1078                  RXCHK_BRCM_TAG_MATCH_SHIFT | RXCHK_EN | RXCHK_BRCM_TAG_EN);
1079         rxchk_writel(priv, reg, RXCHK_CONTROL);
1080
1081         /* Make sure we restore correct CID index in case HW lost
1082          * its context during deep idle state
1083          */
1084         for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
1085                 rxchk_writel(priv, priv->filters_loc[index] <<
1086                              RXCHK_BRCM_TAG_CID_SHIFT, RXCHK_BRCM_TAG(index));
1087                 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
1088         }
1089
1090         /* Clear the MagicPacket detection logic */
1091         mpd_enable_set(priv, false);
1092
1093         reg = intrl2_0_readl(priv, INTRL2_CPU_STATUS);
1094         if (reg & INTRL2_0_MPD)
1095                 netdev_info(priv->netdev, "Wake-on-LAN (MPD) interrupt!\n");
1096
1097         if (reg & INTRL2_0_BRCM_MATCH_TAG) {
1098                 reg = rxchk_readl(priv, RXCHK_BRCM_TAG_MATCH_STATUS) &
1099                                   RXCHK_BRCM_TAG_MATCH_MASK;
1100                 netdev_info(priv->netdev,
1101                             "Wake-on-LAN (filters 0x%02x) interrupt!\n", reg);
1102         }
1103
1104         netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
1105 }
1106
1107 static void bcm_sysport_dim_work(struct work_struct *work)
1108 {
1109         struct dim *dim = container_of(work, struct dim, work);
1110         struct bcm_sysport_net_dim *ndim =
1111                         container_of(dim, struct bcm_sysport_net_dim, dim);
1112         struct bcm_sysport_priv *priv =
1113                         container_of(ndim, struct bcm_sysport_priv, dim);
1114         struct dim_cq_moder cur_profile = net_dim_get_rx_moderation(dim->mode,
1115                                                                     dim->profile_ix);
1116
1117         bcm_sysport_set_rx_coalesce(priv, cur_profile.usec, cur_profile.pkts);
1118         dim->state = DIM_START_MEASURE;
1119 }
1120
1121 /* RX and misc interrupt routine */
1122 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
1123 {
1124         struct net_device *dev = dev_id;
1125         struct bcm_sysport_priv *priv = netdev_priv(dev);
1126         struct bcm_sysport_tx_ring *txr;
1127         unsigned int ring, ring_bit;
1128
1129         priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
1130                           ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
1131         intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
1132
1133         if (unlikely(priv->irq0_stat == 0)) {
1134                 netdev_warn(priv->netdev, "spurious RX interrupt\n");
1135                 return IRQ_NONE;
1136         }
1137
1138         if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
1139                 priv->dim.event_ctr++;
1140                 if (likely(napi_schedule_prep(&priv->napi))) {
1141                         /* disable RX interrupts */
1142                         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
1143                         __napi_schedule_irqoff(&priv->napi);
1144                 }
1145         }
1146
1147         /* TX ring is full, perform a full reclaim since we do not know
1148          * which one would trigger this interrupt
1149          */
1150         if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
1151                 bcm_sysport_tx_reclaim_all(priv);
1152
1153         if (!priv->is_lite)
1154                 goto out;
1155
1156         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1157                 ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT);
1158                 if (!(priv->irq0_stat & ring_bit))
1159                         continue;
1160
1161                 txr = &priv->tx_rings[ring];
1162
1163                 if (likely(napi_schedule_prep(&txr->napi))) {
1164                         intrl2_0_mask_set(priv, ring_bit);
1165                         __napi_schedule(&txr->napi);
1166                 }
1167         }
1168 out:
1169         return IRQ_HANDLED;
1170 }
1171
1172 /* TX interrupt service routine */
1173 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
1174 {
1175         struct net_device *dev = dev_id;
1176         struct bcm_sysport_priv *priv = netdev_priv(dev);
1177         struct bcm_sysport_tx_ring *txr;
1178         unsigned int ring;
1179
1180         priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
1181                                 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
1182         intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1183
1184         if (unlikely(priv->irq1_stat == 0)) {
1185                 netdev_warn(priv->netdev, "spurious TX interrupt\n");
1186                 return IRQ_NONE;
1187         }
1188
1189         for (ring = 0; ring < dev->num_tx_queues; ring++) {
1190                 if (!(priv->irq1_stat & BIT(ring)))
1191                         continue;
1192
1193                 txr = &priv->tx_rings[ring];
1194
1195                 if (likely(napi_schedule_prep(&txr->napi))) {
1196                         intrl2_1_mask_set(priv, BIT(ring));
1197                         __napi_schedule_irqoff(&txr->napi);
1198                 }
1199         }
1200
1201         return IRQ_HANDLED;
1202 }
1203
1204 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
1205 {
1206         struct bcm_sysport_priv *priv = dev_id;
1207
1208         pm_wakeup_event(&priv->pdev->dev, 0);
1209
1210         return IRQ_HANDLED;
1211 }
1212
1213 #ifdef CONFIG_NET_POLL_CONTROLLER
1214 static void bcm_sysport_poll_controller(struct net_device *dev)
1215 {
1216         struct bcm_sysport_priv *priv = netdev_priv(dev);
1217
1218         disable_irq(priv->irq0);
1219         bcm_sysport_rx_isr(priv->irq0, priv);
1220         enable_irq(priv->irq0);
1221
1222         if (!priv->is_lite) {
1223                 disable_irq(priv->irq1);
1224                 bcm_sysport_tx_isr(priv->irq1, priv);
1225                 enable_irq(priv->irq1);
1226         }
1227 }
1228 #endif
1229
1230 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
1231                                               struct net_device *dev)
1232 {
1233         struct bcm_sysport_priv *priv = netdev_priv(dev);
1234         struct sk_buff *nskb;
1235         struct bcm_tsb *tsb;
1236         u32 csum_info;
1237         u8 ip_proto;
1238         u16 csum_start;
1239         __be16 ip_ver;
1240
1241         /* Re-allocate SKB if needed */
1242         if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
1243                 nskb = skb_realloc_headroom(skb, sizeof(*tsb));
1244                 if (!nskb) {
1245                         dev_kfree_skb_any(skb);
1246                         priv->mib.tx_realloc_tsb_failed++;
1247                         dev->stats.tx_errors++;
1248                         dev->stats.tx_dropped++;
1249                         return NULL;
1250                 }
1251                 dev_consume_skb_any(skb);
1252                 skb = nskb;
1253                 priv->mib.tx_realloc_tsb++;
1254         }
1255
1256         tsb = skb_push(skb, sizeof(*tsb));
1257         /* Zero-out TSB by default */
1258         memset(tsb, 0, sizeof(*tsb));
1259
1260         if (skb_vlan_tag_present(skb)) {
1261                 tsb->pcp_dei_vid = skb_vlan_tag_get_prio(skb) & PCP_DEI_MASK;
1262                 tsb->pcp_dei_vid |= (u32)skb_vlan_tag_get_id(skb) << VID_SHIFT;
1263         }
1264
1265         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1266                 ip_ver = skb->protocol;
1267                 switch (ip_ver) {
1268                 case htons(ETH_P_IP):
1269                         ip_proto = ip_hdr(skb)->protocol;
1270                         break;
1271                 case htons(ETH_P_IPV6):
1272                         ip_proto = ipv6_hdr(skb)->nexthdr;
1273                         break;
1274                 default:
1275                         return skb;
1276                 }
1277
1278                 /* Get the checksum offset and the L4 (transport) offset */
1279                 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
1280                 /* Account for the HW inserted VLAN tag */
1281                 if (skb_vlan_tag_present(skb))
1282                         csum_start += VLAN_HLEN;
1283                 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
1284                 csum_info |= (csum_start << L4_PTR_SHIFT);
1285
1286                 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1287                         csum_info |= L4_LENGTH_VALID;
1288                         if (ip_proto == IPPROTO_UDP &&
1289                             ip_ver == htons(ETH_P_IP))
1290                                 csum_info |= L4_UDP;
1291                 } else {
1292                         csum_info = 0;
1293                 }
1294
1295                 tsb->l4_ptr_dest_map = csum_info;
1296         }
1297
1298         return skb;
1299 }
1300
1301 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
1302                                     struct net_device *dev)
1303 {
1304         struct bcm_sysport_priv *priv = netdev_priv(dev);
1305         struct device *kdev = &priv->pdev->dev;
1306         struct bcm_sysport_tx_ring *ring;
1307         unsigned long flags, desc_flags;
1308         struct bcm_sysport_cb *cb;
1309         struct netdev_queue *txq;
1310         u32 len_status, addr_lo;
1311         unsigned int skb_len;
1312         dma_addr_t mapping;
1313         u16 queue;
1314         int ret;
1315
1316         queue = skb_get_queue_mapping(skb);
1317         txq = netdev_get_tx_queue(dev, queue);
1318         ring = &priv->tx_rings[queue];
1319
1320         /* lock against tx reclaim in BH context and TX ring full interrupt */
1321         spin_lock_irqsave(&ring->lock, flags);
1322         if (unlikely(ring->desc_count == 0)) {
1323                 netif_tx_stop_queue(txq);
1324                 netdev_err(dev, "queue %d awake and ring full!\n", queue);
1325                 ret = NETDEV_TX_BUSY;
1326                 goto out;
1327         }
1328
1329         /* Insert TSB and checksum infos */
1330         if (priv->tsb_en) {
1331                 skb = bcm_sysport_insert_tsb(skb, dev);
1332                 if (!skb) {
1333                         ret = NETDEV_TX_OK;
1334                         goto out;
1335                 }
1336         }
1337
1338         skb_len = skb->len;
1339
1340         mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1341         if (dma_mapping_error(kdev, mapping)) {
1342                 priv->mib.tx_dma_failed++;
1343                 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
1344                           skb->data, skb_len);
1345                 ret = NETDEV_TX_OK;
1346                 goto out;
1347         }
1348
1349         /* Remember the SKB for future freeing */
1350         cb = &ring->cbs[ring->curr_desc];
1351         cb->skb = skb;
1352         dma_unmap_addr_set(cb, dma_addr, mapping);
1353         dma_unmap_len_set(cb, dma_len, skb_len);
1354
1355         addr_lo = lower_32_bits(mapping);
1356         len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
1357         len_status |= (skb_len << DESC_LEN_SHIFT);
1358         len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
1359                        DESC_STATUS_SHIFT;
1360         if (skb->ip_summed == CHECKSUM_PARTIAL)
1361                 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1362         if (skb_vlan_tag_present(skb))
1363                 len_status |= (TX_STATUS_VLAN_VID_TSB << DESC_STATUS_SHIFT);
1364
1365         ring->curr_desc++;
1366         if (ring->curr_desc == ring->size)
1367                 ring->curr_desc = 0;
1368         ring->desc_count--;
1369
1370         /* Ports are latched, so write upper address first */
1371         spin_lock_irqsave(&priv->desc_lock, desc_flags);
1372         tdma_writel(priv, len_status, TDMA_WRITE_PORT_HI(ring->index));
1373         tdma_writel(priv, addr_lo, TDMA_WRITE_PORT_LO(ring->index));
1374         spin_unlock_irqrestore(&priv->desc_lock, desc_flags);
1375
1376         /* Check ring space and update SW control flow */
1377         if (ring->desc_count == 0)
1378                 netif_tx_stop_queue(txq);
1379
1380         netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
1381                   ring->index, ring->desc_count, ring->curr_desc);
1382
1383         ret = NETDEV_TX_OK;
1384 out:
1385         spin_unlock_irqrestore(&ring->lock, flags);
1386         return ret;
1387 }
1388
1389 static void bcm_sysport_tx_timeout(struct net_device *dev, unsigned int txqueue)
1390 {
1391         netdev_warn(dev, "transmit timeout!\n");
1392
1393         netif_trans_update(dev);
1394         dev->stats.tx_errors++;
1395
1396         netif_tx_wake_all_queues(dev);
1397 }
1398
1399 /* phylib adjust link callback */
1400 static void bcm_sysport_adj_link(struct net_device *dev)
1401 {
1402         struct bcm_sysport_priv *priv = netdev_priv(dev);
1403         struct phy_device *phydev = dev->phydev;
1404         unsigned int changed = 0;
1405         u32 cmd_bits = 0, reg;
1406
1407         if (priv->old_link != phydev->link) {
1408                 changed = 1;
1409                 priv->old_link = phydev->link;
1410         }
1411
1412         if (priv->old_duplex != phydev->duplex) {
1413                 changed = 1;
1414                 priv->old_duplex = phydev->duplex;
1415         }
1416
1417         if (priv->is_lite)
1418                 goto out;
1419
1420         switch (phydev->speed) {
1421         case SPEED_2500:
1422                 cmd_bits = CMD_SPEED_2500;
1423                 break;
1424         case SPEED_1000:
1425                 cmd_bits = CMD_SPEED_1000;
1426                 break;
1427         case SPEED_100:
1428                 cmd_bits = CMD_SPEED_100;
1429                 break;
1430         case SPEED_10:
1431                 cmd_bits = CMD_SPEED_10;
1432                 break;
1433         default:
1434                 break;
1435         }
1436         cmd_bits <<= CMD_SPEED_SHIFT;
1437
1438         if (phydev->duplex == DUPLEX_HALF)
1439                 cmd_bits |= CMD_HD_EN;
1440
1441         if (priv->old_pause != phydev->pause) {
1442                 changed = 1;
1443                 priv->old_pause = phydev->pause;
1444         }
1445
1446         if (!phydev->pause)
1447                 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1448
1449         if (!changed)
1450                 return;
1451
1452         if (phydev->link) {
1453                 reg = umac_readl(priv, UMAC_CMD);
1454                 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
1455                         CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1456                         CMD_TX_PAUSE_IGNORE);
1457                 reg |= cmd_bits;
1458                 umac_writel(priv, reg, UMAC_CMD);
1459         }
1460 out:
1461         if (changed)
1462                 phy_print_status(phydev);
1463 }
1464
1465 static void bcm_sysport_init_dim(struct bcm_sysport_priv *priv,
1466                                  void (*cb)(struct work_struct *work))
1467 {
1468         struct bcm_sysport_net_dim *dim = &priv->dim;
1469
1470         INIT_WORK(&dim->dim.work, cb);
1471         dim->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1472         dim->event_ctr = 0;
1473         dim->packets = 0;
1474         dim->bytes = 0;
1475 }
1476
1477 static void bcm_sysport_init_rx_coalesce(struct bcm_sysport_priv *priv)
1478 {
1479         struct bcm_sysport_net_dim *dim = &priv->dim;
1480         struct dim_cq_moder moder;
1481         u32 usecs, pkts;
1482
1483         usecs = priv->rx_coalesce_usecs;
1484         pkts = priv->rx_max_coalesced_frames;
1485
1486         /* If DIM was enabled, re-apply default parameters */
1487         if (dim->use_dim) {
1488                 moder = net_dim_get_def_rx_moderation(dim->dim.mode);
1489                 usecs = moder.usec;
1490                 pkts = moder.pkts;
1491         }
1492
1493         bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
1494 }
1495
1496 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1497                                     unsigned int index)
1498 {
1499         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1500         size_t size;
1501         u32 reg;
1502
1503         /* Simple descriptors partitioning for now */
1504         size = 256;
1505
1506         ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1507         if (!ring->cbs) {
1508                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1509                 return -ENOMEM;
1510         }
1511
1512         /* Initialize SW view of the ring */
1513         spin_lock_init(&ring->lock);
1514         ring->priv = priv;
1515         netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64);
1516         ring->index = index;
1517         ring->size = size;
1518         ring->clean_index = 0;
1519         ring->alloc_size = ring->size;
1520         ring->desc_count = ring->size;
1521         ring->curr_desc = 0;
1522
1523         /* Initialize HW ring */
1524         tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1525         tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1526         tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1527         tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1528
1529         /* Configure QID and port mapping */
1530         reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index));
1531         reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT);
1532         if (ring->inspect) {
1533                 reg |= ring->switch_queue & RING_QID_MASK;
1534                 reg |= ring->switch_port << RING_PORT_ID_SHIFT;
1535         } else {
1536                 reg |= RING_IGNORE_STATUS;
1537         }
1538         tdma_writel(priv, reg, TDMA_DESC_RING_MAPPING(index));
1539         reg = 0;
1540         /* Adjust the packet size calculations if SYSTEMPORT is responsible
1541          * for HW insertion of VLAN tags
1542          */
1543         if (priv->netdev->features & NETIF_F_HW_VLAN_CTAG_TX)
1544                 reg = VLAN_HLEN << RING_PKT_SIZE_ADJ_SHIFT;
1545         tdma_writel(priv, reg, TDMA_DESC_RING_PCP_DEI_VID(index));
1546
1547         /* Enable ACB algorithm 2 */
1548         reg = tdma_readl(priv, TDMA_CONTROL);
1549         reg |= tdma_control_bit(priv, ACB_ALGO);
1550         tdma_writel(priv, reg, TDMA_CONTROL);
1551
1552         /* Do not use tdma_control_bit() here because TSB_SWAP1 collides
1553          * with the original definition of ACB_ALGO
1554          */
1555         reg = tdma_readl(priv, TDMA_CONTROL);
1556         if (priv->is_lite)
1557                 reg &= ~BIT(TSB_SWAP1);
1558         /* Set a correct TSB format based on host endian */
1559         if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1560                 reg |= tdma_control_bit(priv, TSB_SWAP0);
1561         else
1562                 reg &= ~tdma_control_bit(priv, TSB_SWAP0);
1563         tdma_writel(priv, reg, TDMA_CONTROL);
1564
1565         /* Program the number of descriptors as MAX_THRESHOLD and half of
1566          * its size for the hysteresis trigger
1567          */
1568         tdma_writel(priv, ring->size |
1569                         1 << RING_HYST_THRESH_SHIFT,
1570                         TDMA_DESC_RING_MAX_HYST(index));
1571
1572         /* Enable the ring queue in the arbiter */
1573         reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1574         reg |= (1 << index);
1575         tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1576
1577         napi_enable(&ring->napi);
1578
1579         netif_dbg(priv, hw, priv->netdev,
1580                   "TDMA cfg, size=%d, switch q=%d,port=%d\n",
1581                   ring->size, ring->switch_queue,
1582                   ring->switch_port);
1583
1584         return 0;
1585 }
1586
1587 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1588                                      unsigned int index)
1589 {
1590         struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1591         u32 reg;
1592
1593         /* Caller should stop the TDMA engine */
1594         reg = tdma_readl(priv, TDMA_STATUS);
1595         if (!(reg & TDMA_DISABLED))
1596                 netdev_warn(priv->netdev, "TDMA not stopped!\n");
1597
1598         /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1599          * fail, so by checking this pointer we know whether the TX ring was
1600          * fully initialized or not.
1601          */
1602         if (!ring->cbs)
1603                 return;
1604
1605         napi_disable(&ring->napi);
1606         netif_napi_del(&ring->napi);
1607
1608         bcm_sysport_tx_clean(priv, ring);
1609
1610         kfree(ring->cbs);
1611         ring->cbs = NULL;
1612         ring->size = 0;
1613         ring->alloc_size = 0;
1614
1615         netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1616 }
1617
1618 /* RDMA helper */
1619 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1620                                   unsigned int enable)
1621 {
1622         unsigned int timeout = 1000;
1623         u32 reg;
1624
1625         reg = rdma_readl(priv, RDMA_CONTROL);
1626         if (enable)
1627                 reg |= RDMA_EN;
1628         else
1629                 reg &= ~RDMA_EN;
1630         rdma_writel(priv, reg, RDMA_CONTROL);
1631
1632         /* Poll for RMDA disabling completion */
1633         do {
1634                 reg = rdma_readl(priv, RDMA_STATUS);
1635                 if (!!(reg & RDMA_DISABLED) == !enable)
1636                         return 0;
1637                 usleep_range(1000, 2000);
1638         } while (timeout-- > 0);
1639
1640         netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1641
1642         return -ETIMEDOUT;
1643 }
1644
1645 /* TDMA helper */
1646 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1647                                   unsigned int enable)
1648 {
1649         unsigned int timeout = 1000;
1650         u32 reg;
1651
1652         reg = tdma_readl(priv, TDMA_CONTROL);
1653         if (enable)
1654                 reg |= tdma_control_bit(priv, TDMA_EN);
1655         else
1656                 reg &= ~tdma_control_bit(priv, TDMA_EN);
1657         tdma_writel(priv, reg, TDMA_CONTROL);
1658
1659         /* Poll for TMDA disabling completion */
1660         do {
1661                 reg = tdma_readl(priv, TDMA_STATUS);
1662                 if (!!(reg & TDMA_DISABLED) == !enable)
1663                         return 0;
1664
1665                 usleep_range(1000, 2000);
1666         } while (timeout-- > 0);
1667
1668         netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1669
1670         return -ETIMEDOUT;
1671 }
1672
1673 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1674 {
1675         struct bcm_sysport_cb *cb;
1676         u32 reg;
1677         int ret;
1678         int i;
1679
1680         /* Initialize SW view of the RX ring */
1681         priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC;
1682         priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1683         priv->rx_c_index = 0;
1684         priv->rx_read_ptr = 0;
1685         priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1686                                 GFP_KERNEL);
1687         if (!priv->rx_cbs) {
1688                 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1689                 return -ENOMEM;
1690         }
1691
1692         for (i = 0; i < priv->num_rx_bds; i++) {
1693                 cb = priv->rx_cbs + i;
1694                 cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1695         }
1696
1697         ret = bcm_sysport_alloc_rx_bufs(priv);
1698         if (ret) {
1699                 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1700                 return ret;
1701         }
1702
1703         /* Initialize HW, ensure RDMA is disabled */
1704         reg = rdma_readl(priv, RDMA_STATUS);
1705         if (!(reg & RDMA_DISABLED))
1706                 rdma_enable_set(priv, 0);
1707
1708         rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1709         rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1710         rdma_writel(priv, 0, RDMA_PROD_INDEX);
1711         rdma_writel(priv, 0, RDMA_CONS_INDEX);
1712         rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1713                           RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1714         /* Operate the queue in ring mode */
1715         rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1716         rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1717         rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1718         rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO);
1719
1720         netif_dbg(priv, hw, priv->netdev,
1721                   "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1722                   priv->num_rx_bds, priv->rx_bds);
1723
1724         return 0;
1725 }
1726
1727 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1728 {
1729         struct bcm_sysport_cb *cb;
1730         unsigned int i;
1731         u32 reg;
1732
1733         /* Caller should ensure RDMA is disabled */
1734         reg = rdma_readl(priv, RDMA_STATUS);
1735         if (!(reg & RDMA_DISABLED))
1736                 netdev_warn(priv->netdev, "RDMA not stopped!\n");
1737
1738         for (i = 0; i < priv->num_rx_bds; i++) {
1739                 cb = &priv->rx_cbs[i];
1740                 if (dma_unmap_addr(cb, dma_addr))
1741                         dma_unmap_single(&priv->pdev->dev,
1742                                          dma_unmap_addr(cb, dma_addr),
1743                                          RX_BUF_LENGTH, DMA_FROM_DEVICE);
1744                 bcm_sysport_free_cb(cb);
1745         }
1746
1747         kfree(priv->rx_cbs);
1748         priv->rx_cbs = NULL;
1749
1750         netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1751 }
1752
1753 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1754 {
1755         struct bcm_sysport_priv *priv = netdev_priv(dev);
1756         u32 reg;
1757
1758         if (priv->is_lite)
1759                 return;
1760
1761         reg = umac_readl(priv, UMAC_CMD);
1762         if (dev->flags & IFF_PROMISC)
1763                 reg |= CMD_PROMISC;
1764         else
1765                 reg &= ~CMD_PROMISC;
1766         umac_writel(priv, reg, UMAC_CMD);
1767
1768         /* No support for ALLMULTI */
1769         if (dev->flags & IFF_ALLMULTI)
1770                 return;
1771 }
1772
1773 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1774                                    u32 mask, unsigned int enable)
1775 {
1776         u32 reg;
1777
1778         if (!priv->is_lite) {
1779                 reg = umac_readl(priv, UMAC_CMD);
1780                 if (enable)
1781                         reg |= mask;
1782                 else
1783                         reg &= ~mask;
1784                 umac_writel(priv, reg, UMAC_CMD);
1785         } else {
1786                 reg = gib_readl(priv, GIB_CONTROL);
1787                 if (enable)
1788                         reg |= mask;
1789                 else
1790                         reg &= ~mask;
1791                 gib_writel(priv, reg, GIB_CONTROL);
1792         }
1793
1794         /* UniMAC stops on a packet boundary, wait for a full-sized packet
1795          * to be processed (1 msec).
1796          */
1797         if (enable == 0)
1798                 usleep_range(1000, 2000);
1799 }
1800
1801 static inline void umac_reset(struct bcm_sysport_priv *priv)
1802 {
1803         u32 reg;
1804
1805         if (priv->is_lite)
1806                 return;
1807
1808         reg = umac_readl(priv, UMAC_CMD);
1809         reg |= CMD_SW_RESET;
1810         umac_writel(priv, reg, UMAC_CMD);
1811         udelay(10);
1812         reg = umac_readl(priv, UMAC_CMD);
1813         reg &= ~CMD_SW_RESET;
1814         umac_writel(priv, reg, UMAC_CMD);
1815 }
1816
1817 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1818                              unsigned char *addr)
1819 {
1820         u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) |
1821                     addr[3];
1822         u32 mac1 = (addr[4] << 8) | addr[5];
1823
1824         if (!priv->is_lite) {
1825                 umac_writel(priv, mac0, UMAC_MAC0);
1826                 umac_writel(priv, mac1, UMAC_MAC1);
1827         } else {
1828                 gib_writel(priv, mac0, GIB_MAC0);
1829                 gib_writel(priv, mac1, GIB_MAC1);
1830         }
1831 }
1832
1833 static void topctrl_flush(struct bcm_sysport_priv *priv)
1834 {
1835         topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1836         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1837         mdelay(1);
1838         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1839         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1840 }
1841
1842 static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1843 {
1844         struct bcm_sysport_priv *priv = netdev_priv(dev);
1845         struct sockaddr *addr = p;
1846
1847         if (!is_valid_ether_addr(addr->sa_data))
1848                 return -EINVAL;
1849
1850         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1851
1852         /* interface is disabled, changes to MAC will be reflected on next
1853          * open call
1854          */
1855         if (!netif_running(dev))
1856                 return 0;
1857
1858         umac_set_hw_addr(priv, dev->dev_addr);
1859
1860         return 0;
1861 }
1862
1863 static void bcm_sysport_get_stats64(struct net_device *dev,
1864                                     struct rtnl_link_stats64 *stats)
1865 {
1866         struct bcm_sysport_priv *priv = netdev_priv(dev);
1867         struct bcm_sysport_stats64 *stats64 = &priv->stats64;
1868         unsigned int start;
1869
1870         netdev_stats_to_stats64(stats, &dev->stats);
1871
1872         bcm_sysport_update_tx_stats(priv, &stats->tx_bytes,
1873                                     &stats->tx_packets);
1874
1875         do {
1876                 start = u64_stats_fetch_begin_irq(&priv->syncp);
1877                 stats->rx_packets = stats64->rx_packets;
1878                 stats->rx_bytes = stats64->rx_bytes;
1879         } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
1880 }
1881
1882 static void bcm_sysport_netif_start(struct net_device *dev)
1883 {
1884         struct bcm_sysport_priv *priv = netdev_priv(dev);
1885
1886         /* Enable NAPI */
1887         bcm_sysport_init_dim(priv, bcm_sysport_dim_work);
1888         bcm_sysport_init_rx_coalesce(priv);
1889         napi_enable(&priv->napi);
1890
1891         /* Enable RX interrupt and TX ring full interrupt */
1892         intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1893
1894         phy_start(dev->phydev);
1895
1896         /* Enable TX interrupts for the TXQs */
1897         if (!priv->is_lite)
1898                 intrl2_1_mask_clear(priv, 0xffffffff);
1899         else
1900                 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK);
1901 }
1902
1903 static void rbuf_init(struct bcm_sysport_priv *priv)
1904 {
1905         u32 reg;
1906
1907         reg = rbuf_readl(priv, RBUF_CONTROL);
1908         reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1909         /* Set a correct RSB format on SYSTEMPORT Lite */
1910         if (priv->is_lite)
1911                 reg &= ~RBUF_RSB_SWAP1;
1912
1913         /* Set a correct RSB format based on host endian */
1914         if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1915                 reg |= RBUF_RSB_SWAP0;
1916         else
1917                 reg &= ~RBUF_RSB_SWAP0;
1918         rbuf_writel(priv, reg, RBUF_CONTROL);
1919 }
1920
1921 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv)
1922 {
1923         intrl2_0_mask_set(priv, 0xffffffff);
1924         intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1925         if (!priv->is_lite) {
1926                 intrl2_1_mask_set(priv, 0xffffffff);
1927                 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1928         }
1929 }
1930
1931 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv)
1932 {
1933         u32 reg;
1934
1935         reg = gib_readl(priv, GIB_CONTROL);
1936         /* Include Broadcom tag in pad extension and fix up IPG_LENGTH */
1937         if (netdev_uses_dsa(priv->netdev)) {
1938                 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT);
1939                 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT;
1940         }
1941         reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT);
1942         reg |= 12 << GIB_IPG_LEN_SHIFT;
1943         gib_writel(priv, reg, GIB_CONTROL);
1944 }
1945
1946 static int bcm_sysport_open(struct net_device *dev)
1947 {
1948         struct bcm_sysport_priv *priv = netdev_priv(dev);
1949         struct phy_device *phydev;
1950         unsigned int i;
1951         int ret;
1952
1953         clk_prepare_enable(priv->clk);
1954
1955         /* Reset UniMAC */
1956         umac_reset(priv);
1957
1958         /* Flush TX and RX FIFOs at TOPCTRL level */
1959         topctrl_flush(priv);
1960
1961         /* Disable the UniMAC RX/TX */
1962         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1963
1964         /* Enable RBUF 2bytes alignment and Receive Status Block */
1965         rbuf_init(priv);
1966
1967         /* Set maximum frame length */
1968         if (!priv->is_lite)
1969                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1970         else
1971                 gib_set_pad_extension(priv);
1972
1973         /* Apply features again in case we changed them while interface was
1974          * down
1975          */
1976         bcm_sysport_set_features(dev, dev->features);
1977
1978         /* Set MAC address */
1979         umac_set_hw_addr(priv, dev->dev_addr);
1980
1981         phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1982                                 0, priv->phy_interface);
1983         if (!phydev) {
1984                 netdev_err(dev, "could not attach to PHY\n");
1985                 ret = -ENODEV;
1986                 goto out_clk_disable;
1987         }
1988
1989         /* Reset house keeping link status */
1990         priv->old_duplex = -1;
1991         priv->old_link = -1;
1992         priv->old_pause = -1;
1993
1994         /* mask all interrupts and request them */
1995         bcm_sysport_mask_all_intrs(priv);
1996
1997         ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
1998         if (ret) {
1999                 netdev_err(dev, "failed to request RX interrupt\n");
2000                 goto out_phy_disconnect;
2001         }
2002
2003         if (!priv->is_lite) {
2004                 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0,
2005                                   dev->name, dev);
2006                 if (ret) {
2007                         netdev_err(dev, "failed to request TX interrupt\n");
2008                         goto out_free_irq0;
2009                 }
2010         }
2011
2012         /* Initialize both hardware and software ring */
2013         spin_lock_init(&priv->desc_lock);
2014         for (i = 0; i < dev->num_tx_queues; i++) {
2015                 ret = bcm_sysport_init_tx_ring(priv, i);
2016                 if (ret) {
2017                         netdev_err(dev, "failed to initialize TX ring %d\n",
2018                                    i);
2019                         goto out_free_tx_ring;
2020                 }
2021         }
2022
2023         /* Initialize linked-list */
2024         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2025
2026         /* Initialize RX ring */
2027         ret = bcm_sysport_init_rx_ring(priv);
2028         if (ret) {
2029                 netdev_err(dev, "failed to initialize RX ring\n");
2030                 goto out_free_rx_ring;
2031         }
2032
2033         /* Turn on RDMA */
2034         ret = rdma_enable_set(priv, 1);
2035         if (ret)
2036                 goto out_free_rx_ring;
2037
2038         /* Turn on TDMA */
2039         ret = tdma_enable_set(priv, 1);
2040         if (ret)
2041                 goto out_clear_rx_int;
2042
2043         /* Turn on UniMAC TX/RX */
2044         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
2045
2046         bcm_sysport_netif_start(dev);
2047
2048         netif_tx_start_all_queues(dev);
2049
2050         return 0;
2051
2052 out_clear_rx_int:
2053         intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
2054 out_free_rx_ring:
2055         bcm_sysport_fini_rx_ring(priv);
2056 out_free_tx_ring:
2057         for (i = 0; i < dev->num_tx_queues; i++)
2058                 bcm_sysport_fini_tx_ring(priv, i);
2059         if (!priv->is_lite)
2060                 free_irq(priv->irq1, dev);
2061 out_free_irq0:
2062         free_irq(priv->irq0, dev);
2063 out_phy_disconnect:
2064         phy_disconnect(phydev);
2065 out_clk_disable:
2066         clk_disable_unprepare(priv->clk);
2067         return ret;
2068 }
2069
2070 static void bcm_sysport_netif_stop(struct net_device *dev)
2071 {
2072         struct bcm_sysport_priv *priv = netdev_priv(dev);
2073
2074         /* stop all software from updating hardware */
2075         netif_tx_disable(dev);
2076         napi_disable(&priv->napi);
2077         cancel_work_sync(&priv->dim.dim.work);
2078         phy_stop(dev->phydev);
2079
2080         /* mask all interrupts */
2081         bcm_sysport_mask_all_intrs(priv);
2082 }
2083
2084 static int bcm_sysport_stop(struct net_device *dev)
2085 {
2086         struct bcm_sysport_priv *priv = netdev_priv(dev);
2087         unsigned int i;
2088         int ret;
2089
2090         bcm_sysport_netif_stop(dev);
2091
2092         /* Disable UniMAC RX */
2093         umac_enable_set(priv, CMD_RX_EN, 0);
2094
2095         ret = tdma_enable_set(priv, 0);
2096         if (ret) {
2097                 netdev_err(dev, "timeout disabling RDMA\n");
2098                 return ret;
2099         }
2100
2101         /* Wait for a maximum packet size to be drained */
2102         usleep_range(2000, 3000);
2103
2104         ret = rdma_enable_set(priv, 0);
2105         if (ret) {
2106                 netdev_err(dev, "timeout disabling TDMA\n");
2107                 return ret;
2108         }
2109
2110         /* Disable UniMAC TX */
2111         umac_enable_set(priv, CMD_TX_EN, 0);
2112
2113         /* Free RX/TX rings SW structures */
2114         for (i = 0; i < dev->num_tx_queues; i++)
2115                 bcm_sysport_fini_tx_ring(priv, i);
2116         bcm_sysport_fini_rx_ring(priv);
2117
2118         free_irq(priv->irq0, dev);
2119         if (!priv->is_lite)
2120                 free_irq(priv->irq1, dev);
2121
2122         /* Disconnect from PHY */
2123         phy_disconnect(dev->phydev);
2124
2125         clk_disable_unprepare(priv->clk);
2126
2127         return 0;
2128 }
2129
2130 static int bcm_sysport_rule_find(struct bcm_sysport_priv *priv,
2131                                  u64 location)
2132 {
2133         unsigned int index;
2134         u32 reg;
2135
2136         for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2137                 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2138                 reg >>= RXCHK_BRCM_TAG_CID_SHIFT;
2139                 reg &= RXCHK_BRCM_TAG_CID_MASK;
2140                 if (reg == location)
2141                         return index;
2142         }
2143
2144         return -EINVAL;
2145 }
2146
2147 static int bcm_sysport_rule_get(struct bcm_sysport_priv *priv,
2148                                 struct ethtool_rxnfc *nfc)
2149 {
2150         int index;
2151
2152         /* This is not a rule that we know about */
2153         index = bcm_sysport_rule_find(priv, nfc->fs.location);
2154         if (index < 0)
2155                 return -EOPNOTSUPP;
2156
2157         nfc->fs.ring_cookie = RX_CLS_FLOW_WAKE;
2158
2159         return 0;
2160 }
2161
2162 static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv,
2163                                 struct ethtool_rxnfc *nfc)
2164 {
2165         unsigned int index;
2166         u32 reg;
2167
2168         /* We cannot match locations greater than what the classification ID
2169          * permits (256 entries)
2170          */
2171         if (nfc->fs.location > RXCHK_BRCM_TAG_CID_MASK)
2172                 return -E2BIG;
2173
2174         /* We cannot support flows that are not destined for a wake-up */
2175         if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE)
2176                 return -EOPNOTSUPP;
2177
2178         /* All filters are already in use, we cannot match more rules */
2179         if (bitmap_weight(priv->filters, RXCHK_BRCM_TAG_MAX) ==
2180             RXCHK_BRCM_TAG_MAX)
2181                 return -ENOSPC;
2182
2183         index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX);
2184         if (index >= RXCHK_BRCM_TAG_MAX)
2185                 return -ENOSPC;
2186
2187         /* Location is the classification ID, and index is the position
2188          * within one of our 8 possible filters to be programmed
2189          */
2190         reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2191         reg &= ~(RXCHK_BRCM_TAG_CID_MASK << RXCHK_BRCM_TAG_CID_SHIFT);
2192         reg |= nfc->fs.location << RXCHK_BRCM_TAG_CID_SHIFT;
2193         rxchk_writel(priv, reg, RXCHK_BRCM_TAG(index));
2194         rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
2195
2196         priv->filters_loc[index] = nfc->fs.location;
2197         set_bit(index, priv->filters);
2198
2199         return 0;
2200 }
2201
2202 static int bcm_sysport_rule_del(struct bcm_sysport_priv *priv,
2203                                 u64 location)
2204 {
2205         int index;
2206
2207         /* This is not a rule that we know about */
2208         index = bcm_sysport_rule_find(priv, location);
2209         if (index < 0)
2210                 return -EOPNOTSUPP;
2211
2212         /* No need to disable this filter if it was enabled, this will
2213          * be taken care of during suspend time by bcm_sysport_suspend_to_wol
2214          */
2215         clear_bit(index, priv->filters);
2216         priv->filters_loc[index] = 0;
2217
2218         return 0;
2219 }
2220
2221 static int bcm_sysport_get_rxnfc(struct net_device *dev,
2222                                  struct ethtool_rxnfc *nfc, u32 *rule_locs)
2223 {
2224         struct bcm_sysport_priv *priv = netdev_priv(dev);
2225         int ret = -EOPNOTSUPP;
2226
2227         switch (nfc->cmd) {
2228         case ETHTOOL_GRXCLSRULE:
2229                 ret = bcm_sysport_rule_get(priv, nfc);
2230                 break;
2231         default:
2232                 break;
2233         }
2234
2235         return ret;
2236 }
2237
2238 static int bcm_sysport_set_rxnfc(struct net_device *dev,
2239                                  struct ethtool_rxnfc *nfc)
2240 {
2241         struct bcm_sysport_priv *priv = netdev_priv(dev);
2242         int ret = -EOPNOTSUPP;
2243
2244         switch (nfc->cmd) {
2245         case ETHTOOL_SRXCLSRLINS:
2246                 ret = bcm_sysport_rule_set(priv, nfc);
2247                 break;
2248         case ETHTOOL_SRXCLSRLDEL:
2249                 ret = bcm_sysport_rule_del(priv, nfc->fs.location);
2250                 break;
2251         default:
2252                 break;
2253         }
2254
2255         return ret;
2256 }
2257
2258 static const struct ethtool_ops bcm_sysport_ethtool_ops = {
2259         .supported_coalesce_params = ETHTOOL_COALESCE_USECS |
2260                                      ETHTOOL_COALESCE_MAX_FRAMES |
2261                                      ETHTOOL_COALESCE_USE_ADAPTIVE_RX,
2262         .get_drvinfo            = bcm_sysport_get_drvinfo,
2263         .get_msglevel           = bcm_sysport_get_msglvl,
2264         .set_msglevel           = bcm_sysport_set_msglvl,
2265         .get_link               = ethtool_op_get_link,
2266         .get_strings            = bcm_sysport_get_strings,
2267         .get_ethtool_stats      = bcm_sysport_get_stats,
2268         .get_sset_count         = bcm_sysport_get_sset_count,
2269         .get_wol                = bcm_sysport_get_wol,
2270         .set_wol                = bcm_sysport_set_wol,
2271         .get_coalesce           = bcm_sysport_get_coalesce,
2272         .set_coalesce           = bcm_sysport_set_coalesce,
2273         .get_link_ksettings     = phy_ethtool_get_link_ksettings,
2274         .set_link_ksettings     = phy_ethtool_set_link_ksettings,
2275         .get_rxnfc              = bcm_sysport_get_rxnfc,
2276         .set_rxnfc              = bcm_sysport_set_rxnfc,
2277 };
2278
2279 static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb,
2280                                     struct net_device *sb_dev)
2281 {
2282         struct bcm_sysport_priv *priv = netdev_priv(dev);
2283         u16 queue = skb_get_queue_mapping(skb);
2284         struct bcm_sysport_tx_ring *tx_ring;
2285         unsigned int q, port;
2286
2287         if (!netdev_uses_dsa(dev))
2288                 return netdev_pick_tx(dev, skb, NULL);
2289
2290         /* DSA tagging layer will have configured the correct queue */
2291         q = BRCM_TAG_GET_QUEUE(queue);
2292         port = BRCM_TAG_GET_PORT(queue);
2293         tx_ring = priv->ring_map[q + port * priv->per_port_num_tx_queues];
2294
2295         if (unlikely(!tx_ring))
2296                 return netdev_pick_tx(dev, skb, NULL);
2297
2298         return tx_ring->index;
2299 }
2300
2301 static const struct net_device_ops bcm_sysport_netdev_ops = {
2302         .ndo_start_xmit         = bcm_sysport_xmit,
2303         .ndo_tx_timeout         = bcm_sysport_tx_timeout,
2304         .ndo_open               = bcm_sysport_open,
2305         .ndo_stop               = bcm_sysport_stop,
2306         .ndo_set_features       = bcm_sysport_set_features,
2307         .ndo_set_rx_mode        = bcm_sysport_set_rx_mode,
2308         .ndo_set_mac_address    = bcm_sysport_change_mac,
2309 #ifdef CONFIG_NET_POLL_CONTROLLER
2310         .ndo_poll_controller    = bcm_sysport_poll_controller,
2311 #endif
2312         .ndo_get_stats64        = bcm_sysport_get_stats64,
2313         .ndo_select_queue       = bcm_sysport_select_queue,
2314 };
2315
2316 static int bcm_sysport_map_queues(struct notifier_block *nb,
2317                                   struct dsa_notifier_register_info *info)
2318 {
2319         struct bcm_sysport_tx_ring *ring;
2320         struct bcm_sysport_priv *priv;
2321         struct net_device *slave_dev;
2322         unsigned int num_tx_queues;
2323         unsigned int q, qp, port;
2324         struct net_device *dev;
2325
2326         priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2327         if (priv->netdev != info->master)
2328                 return 0;
2329
2330         dev = info->master;
2331
2332         /* We can't be setting up queue inspection for non directly attached
2333          * switches
2334          */
2335         if (info->switch_number)
2336                 return 0;
2337
2338         if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2339                 return 0;
2340
2341         port = info->port_number;
2342         slave_dev = info->info.dev;
2343
2344         /* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a
2345          * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of
2346          * per-port (slave_dev) network devices queue, we achieve just that.
2347          * This need to happen now before any slave network device is used such
2348          * it accurately reflects the number of real TX queues.
2349          */
2350         if (priv->is_lite)
2351                 netif_set_real_num_tx_queues(slave_dev,
2352                                              slave_dev->num_tx_queues / 2);
2353
2354         num_tx_queues = slave_dev->real_num_tx_queues;
2355
2356         if (priv->per_port_num_tx_queues &&
2357             priv->per_port_num_tx_queues != num_tx_queues)
2358                 netdev_warn(slave_dev, "asymmetric number of per-port queues\n");
2359
2360         priv->per_port_num_tx_queues = num_tx_queues;
2361
2362         for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues;
2363              q++) {
2364                 ring = &priv->tx_rings[q];
2365
2366                 if (ring->inspect)
2367                         continue;
2368
2369                 /* Just remember the mapping actual programming done
2370                  * during bcm_sysport_init_tx_ring
2371                  */
2372                 ring->switch_queue = qp;
2373                 ring->switch_port = port;
2374                 ring->inspect = true;
2375                 priv->ring_map[qp + port * num_tx_queues] = ring;
2376                 qp++;
2377         }
2378
2379         return 0;
2380 }
2381
2382 static int bcm_sysport_unmap_queues(struct notifier_block *nb,
2383                                     struct dsa_notifier_register_info *info)
2384 {
2385         struct bcm_sysport_tx_ring *ring;
2386         struct bcm_sysport_priv *priv;
2387         struct net_device *slave_dev;
2388         unsigned int num_tx_queues;
2389         struct net_device *dev;
2390         unsigned int q, qp, port;
2391
2392         priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2393         if (priv->netdev != info->master)
2394                 return 0;
2395
2396         dev = info->master;
2397
2398         if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2399                 return 0;
2400
2401         port = info->port_number;
2402         slave_dev = info->info.dev;
2403
2404         num_tx_queues = slave_dev->real_num_tx_queues;
2405
2406         for (q = 0; q < dev->num_tx_queues; q++) {
2407                 ring = &priv->tx_rings[q];
2408
2409                 if (ring->switch_port != port)
2410                         continue;
2411
2412                 if (!ring->inspect)
2413                         continue;
2414
2415                 ring->inspect = false;
2416                 qp = ring->switch_queue;
2417                 priv->ring_map[qp + port * num_tx_queues] = NULL;
2418         }
2419
2420         return 0;
2421 }
2422
2423 static int bcm_sysport_dsa_notifier(struct notifier_block *nb,
2424                                     unsigned long event, void *ptr)
2425 {
2426         int ret = NOTIFY_DONE;
2427
2428         switch (event) {
2429         case DSA_PORT_REGISTER:
2430                 ret = bcm_sysport_map_queues(nb, ptr);
2431                 break;
2432         case DSA_PORT_UNREGISTER:
2433                 ret = bcm_sysport_unmap_queues(nb, ptr);
2434                 break;
2435         }
2436
2437         return notifier_from_errno(ret);
2438 }
2439
2440 #define REV_FMT "v%2x.%02x"
2441
2442 static const struct bcm_sysport_hw_params bcm_sysport_params[] = {
2443         [SYSTEMPORT] = {
2444                 .is_lite = false,
2445                 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS,
2446         },
2447         [SYSTEMPORT_LITE] = {
2448                 .is_lite = true,
2449                 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS,
2450         },
2451 };
2452
2453 static const struct of_device_id bcm_sysport_of_match[] = {
2454         { .compatible = "brcm,systemportlite-v1.00",
2455           .data = &bcm_sysport_params[SYSTEMPORT_LITE] },
2456         { .compatible = "brcm,systemport-v1.00",
2457           .data = &bcm_sysport_params[SYSTEMPORT] },
2458         { .compatible = "brcm,systemport",
2459           .data = &bcm_sysport_params[SYSTEMPORT] },
2460         { /* sentinel */ }
2461 };
2462 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
2463
2464 static int bcm_sysport_probe(struct platform_device *pdev)
2465 {
2466         const struct bcm_sysport_hw_params *params;
2467         const struct of_device_id *of_id = NULL;
2468         struct bcm_sysport_priv *priv;
2469         struct device_node *dn;
2470         struct net_device *dev;
2471         const void *macaddr;
2472         u32 txq, rxq;
2473         int ret;
2474
2475         dn = pdev->dev.of_node;
2476         of_id = of_match_node(bcm_sysport_of_match, dn);
2477         if (!of_id || !of_id->data)
2478                 return -EINVAL;
2479
2480         ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
2481         if (ret)
2482                 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2483         if (ret) {
2484                 dev_err(&pdev->dev, "unable to set DMA mask: %d\n", ret);
2485                 return ret;
2486         }
2487
2488         /* Fairly quickly we need to know the type of adapter we have */
2489         params = of_id->data;
2490
2491         /* Read the Transmit/Receive Queue properties */
2492         if (of_property_read_u32(dn, "systemport,num-txq", &txq))
2493                 txq = TDMA_NUM_RINGS;
2494         if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
2495                 rxq = 1;
2496
2497         /* Sanity check the number of transmit queues */
2498         if (!txq || txq > TDMA_NUM_RINGS)
2499                 return -EINVAL;
2500
2501         dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
2502         if (!dev)
2503                 return -ENOMEM;
2504
2505         /* Initialize private members */
2506         priv = netdev_priv(dev);
2507
2508         priv->clk = devm_clk_get_optional(&pdev->dev, "sw_sysport");
2509         if (IS_ERR(priv->clk)) {
2510                 ret = PTR_ERR(priv->clk);
2511                 goto err_free_netdev;
2512         }
2513
2514         /* Allocate number of TX rings */
2515         priv->tx_rings = devm_kcalloc(&pdev->dev, txq,
2516                                       sizeof(struct bcm_sysport_tx_ring),
2517                                       GFP_KERNEL);
2518         if (!priv->tx_rings) {
2519                 ret = -ENOMEM;
2520                 goto err_free_netdev;
2521         }
2522
2523         priv->is_lite = params->is_lite;
2524         priv->num_rx_desc_words = params->num_rx_desc_words;
2525
2526         priv->irq0 = platform_get_irq(pdev, 0);
2527         if (!priv->is_lite) {
2528                 priv->irq1 = platform_get_irq(pdev, 1);
2529                 priv->wol_irq = platform_get_irq(pdev, 2);
2530         } else {
2531                 priv->wol_irq = platform_get_irq(pdev, 1);
2532         }
2533         if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) {
2534                 ret = -EINVAL;
2535                 goto err_free_netdev;
2536         }
2537
2538         priv->base = devm_platform_ioremap_resource(pdev, 0);
2539         if (IS_ERR(priv->base)) {
2540                 ret = PTR_ERR(priv->base);
2541                 goto err_free_netdev;
2542         }
2543
2544         priv->netdev = dev;
2545         priv->pdev = pdev;
2546
2547         ret = of_get_phy_mode(dn, &priv->phy_interface);
2548         /* Default to GMII interface mode */
2549         if (ret)
2550                 priv->phy_interface = PHY_INTERFACE_MODE_GMII;
2551
2552         /* In the case of a fixed PHY, the DT node associated
2553          * to the PHY is the Ethernet MAC DT node.
2554          */
2555         if (of_phy_is_fixed_link(dn)) {
2556                 ret = of_phy_register_fixed_link(dn);
2557                 if (ret) {
2558                         dev_err(&pdev->dev, "failed to register fixed PHY\n");
2559                         goto err_free_netdev;
2560                 }
2561
2562                 priv->phy_dn = dn;
2563         }
2564
2565         /* Initialize netdevice members */
2566         macaddr = of_get_mac_address(dn);
2567         if (IS_ERR(macaddr)) {
2568                 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
2569                 eth_hw_addr_random(dev);
2570         } else {
2571                 ether_addr_copy(dev->dev_addr, macaddr);
2572         }
2573
2574         SET_NETDEV_DEV(dev, &pdev->dev);
2575         dev_set_drvdata(&pdev->dev, dev);
2576         dev->ethtool_ops = &bcm_sysport_ethtool_ops;
2577         dev->netdev_ops = &bcm_sysport_netdev_ops;
2578         netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64);
2579
2580         dev->features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
2581                          NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2582                          NETIF_F_HW_VLAN_CTAG_TX;
2583         dev->hw_features |= dev->features;
2584         dev->vlan_features |= dev->features;
2585         dev->max_mtu = UMAC_MAX_MTU_SIZE;
2586
2587         /* Request the WOL interrupt and advertise suspend if available */
2588         priv->wol_irq_disabled = 1;
2589         ret = devm_request_irq(&pdev->dev, priv->wol_irq,
2590                                bcm_sysport_wol_isr, 0, dev->name, priv);
2591         if (!ret)
2592                 device_set_wakeup_capable(&pdev->dev, 1);
2593
2594         priv->wol_clk = devm_clk_get_optional(&pdev->dev, "sw_sysportwol");
2595         if (IS_ERR(priv->wol_clk)) {
2596                 ret = PTR_ERR(priv->wol_clk);
2597                 goto err_deregister_fixed_link;
2598         }
2599
2600         /* Set the needed headroom once and for all */
2601         BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
2602         dev->needed_headroom += sizeof(struct bcm_tsb);
2603
2604         /* libphy will adjust the link state accordingly */
2605         netif_carrier_off(dev);
2606
2607         priv->rx_max_coalesced_frames = 1;
2608         u64_stats_init(&priv->syncp);
2609
2610         priv->dsa_notifier.notifier_call = bcm_sysport_dsa_notifier;
2611
2612         ret = register_dsa_notifier(&priv->dsa_notifier);
2613         if (ret) {
2614                 dev_err(&pdev->dev, "failed to register DSA notifier\n");
2615                 goto err_deregister_fixed_link;
2616         }
2617
2618         ret = register_netdev(dev);
2619         if (ret) {
2620                 dev_err(&pdev->dev, "failed to register net_device\n");
2621                 goto err_deregister_notifier;
2622         }
2623
2624         clk_prepare_enable(priv->clk);
2625
2626         priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
2627         dev_info(&pdev->dev,
2628                  "Broadcom SYSTEMPORT%s " REV_FMT
2629                  " (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
2630                  priv->is_lite ? " Lite" : "",
2631                  (priv->rev >> 8) & 0xff, priv->rev & 0xff,
2632                  priv->irq0, priv->irq1, txq, rxq);
2633
2634         clk_disable_unprepare(priv->clk);
2635
2636         return 0;
2637
2638 err_deregister_notifier:
2639         unregister_dsa_notifier(&priv->dsa_notifier);
2640 err_deregister_fixed_link:
2641         if (of_phy_is_fixed_link(dn))
2642                 of_phy_deregister_fixed_link(dn);
2643 err_free_netdev:
2644         free_netdev(dev);
2645         return ret;
2646 }
2647
2648 static int bcm_sysport_remove(struct platform_device *pdev)
2649 {
2650         struct net_device *dev = dev_get_drvdata(&pdev->dev);
2651         struct bcm_sysport_priv *priv = netdev_priv(dev);
2652         struct device_node *dn = pdev->dev.of_node;
2653
2654         /* Not much to do, ndo_close has been called
2655          * and we use managed allocations
2656          */
2657         unregister_dsa_notifier(&priv->dsa_notifier);
2658         unregister_netdev(dev);
2659         if (of_phy_is_fixed_link(dn))
2660                 of_phy_deregister_fixed_link(dn);
2661         free_netdev(dev);
2662         dev_set_drvdata(&pdev->dev, NULL);
2663
2664         return 0;
2665 }
2666
2667 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
2668 {
2669         struct net_device *ndev = priv->netdev;
2670         unsigned int timeout = 1000;
2671         unsigned int index, i = 0;
2672         u32 reg;
2673
2674         reg = umac_readl(priv, UMAC_MPD_CTRL);
2675         if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE))
2676                 reg |= MPD_EN;
2677         reg &= ~PSW_EN;
2678         if (priv->wolopts & WAKE_MAGICSECURE) {
2679                 /* Program the SecureOn password */
2680                 umac_writel(priv, get_unaligned_be16(&priv->sopass[0]),
2681                             UMAC_PSW_MS);
2682                 umac_writel(priv, get_unaligned_be32(&priv->sopass[2]),
2683                             UMAC_PSW_LS);
2684                 reg |= PSW_EN;
2685         }
2686         umac_writel(priv, reg, UMAC_MPD_CTRL);
2687
2688         if (priv->wolopts & WAKE_FILTER) {
2689                 /* Turn on ACPI matching to steal packets from RBUF */
2690                 reg = rbuf_readl(priv, RBUF_CONTROL);
2691                 if (priv->is_lite)
2692                         reg |= RBUF_ACPI_EN_LITE;
2693                 else
2694                         reg |= RBUF_ACPI_EN;
2695                 rbuf_writel(priv, reg, RBUF_CONTROL);
2696
2697                 /* Enable RXCHK, active filters and Broadcom tag matching */
2698                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2699                 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
2700                          RXCHK_BRCM_TAG_MATCH_SHIFT);
2701                 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2702                         reg |= BIT(RXCHK_BRCM_TAG_MATCH_SHIFT + i);
2703                         i++;
2704                 }
2705                 reg |= RXCHK_EN | RXCHK_BRCM_TAG_EN;
2706                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2707         }
2708
2709         /* Make sure RBUF entered WoL mode as result */
2710         do {
2711                 reg = rbuf_readl(priv, RBUF_STATUS);
2712                 if (reg & RBUF_WOL_MODE)
2713                         break;
2714
2715                 udelay(10);
2716         } while (timeout-- > 0);
2717
2718         /* Do not leave the UniMAC RBUF matching only MPD packets */
2719         if (!timeout) {
2720                 mpd_enable_set(priv, false);
2721                 netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
2722                 return -ETIMEDOUT;
2723         }
2724
2725         /* UniMAC receive needs to be turned on */
2726         umac_enable_set(priv, CMD_RX_EN, 1);
2727
2728         netif_dbg(priv, wol, ndev, "entered WOL mode\n");
2729
2730         return 0;
2731 }
2732
2733 static int __maybe_unused bcm_sysport_suspend(struct device *d)
2734 {
2735         struct net_device *dev = dev_get_drvdata(d);
2736         struct bcm_sysport_priv *priv = netdev_priv(dev);
2737         unsigned int i;
2738         int ret = 0;
2739         u32 reg;
2740
2741         if (!netif_running(dev))
2742                 return 0;
2743
2744         netif_device_detach(dev);
2745
2746         bcm_sysport_netif_stop(dev);
2747
2748         phy_suspend(dev->phydev);
2749
2750         /* Disable UniMAC RX */
2751         umac_enable_set(priv, CMD_RX_EN, 0);
2752
2753         ret = rdma_enable_set(priv, 0);
2754         if (ret) {
2755                 netdev_err(dev, "RDMA timeout!\n");
2756                 return ret;
2757         }
2758
2759         /* Disable RXCHK if enabled */
2760         if (priv->rx_chk_en) {
2761                 reg = rxchk_readl(priv, RXCHK_CONTROL);
2762                 reg &= ~RXCHK_EN;
2763                 rxchk_writel(priv, reg, RXCHK_CONTROL);
2764         }
2765
2766         /* Flush RX pipe */
2767         if (!priv->wolopts)
2768                 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
2769
2770         ret = tdma_enable_set(priv, 0);
2771         if (ret) {
2772                 netdev_err(dev, "TDMA timeout!\n");
2773                 return ret;
2774         }
2775
2776         /* Wait for a packet boundary */
2777         usleep_range(2000, 3000);
2778
2779         umac_enable_set(priv, CMD_TX_EN, 0);
2780
2781         topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
2782
2783         /* Free RX/TX rings SW structures */
2784         for (i = 0; i < dev->num_tx_queues; i++)
2785                 bcm_sysport_fini_tx_ring(priv, i);
2786         bcm_sysport_fini_rx_ring(priv);
2787
2788         /* Get prepared for Wake-on-LAN */
2789         if (device_may_wakeup(d) && priv->wolopts) {
2790                 clk_prepare_enable(priv->wol_clk);
2791                 ret = bcm_sysport_suspend_to_wol(priv);
2792         }
2793
2794         clk_disable_unprepare(priv->clk);
2795
2796         return ret;
2797 }
2798
2799 static int __maybe_unused bcm_sysport_resume(struct device *d)
2800 {
2801         struct net_device *dev = dev_get_drvdata(d);
2802         struct bcm_sysport_priv *priv = netdev_priv(dev);
2803         unsigned int i;
2804         int ret;
2805
2806         if (!netif_running(dev))
2807                 return 0;
2808
2809         clk_prepare_enable(priv->clk);
2810         if (priv->wolopts)
2811                 clk_disable_unprepare(priv->wol_clk);
2812
2813         umac_reset(priv);
2814
2815         /* Disable the UniMAC RX/TX */
2816         umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
2817
2818         /* We may have been suspended and never received a WOL event that
2819          * would turn off MPD detection, take care of that now
2820          */
2821         bcm_sysport_resume_from_wol(priv);
2822
2823         /* Initialize both hardware and software ring */
2824         for (i = 0; i < dev->num_tx_queues; i++) {
2825                 ret = bcm_sysport_init_tx_ring(priv, i);
2826                 if (ret) {
2827                         netdev_err(dev, "failed to initialize TX ring %d\n",
2828                                    i);
2829                         goto out_free_tx_rings;
2830                 }
2831         }
2832
2833         /* Initialize linked-list */
2834         tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2835
2836         /* Initialize RX ring */
2837         ret = bcm_sysport_init_rx_ring(priv);
2838         if (ret) {
2839                 netdev_err(dev, "failed to initialize RX ring\n");
2840                 goto out_free_rx_ring;
2841         }
2842
2843         /* RX pipe enable */
2844         topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2845
2846         ret = rdma_enable_set(priv, 1);
2847         if (ret) {
2848                 netdev_err(dev, "failed to enable RDMA\n");
2849                 goto out_free_rx_ring;
2850         }
2851
2852         /* Restore enabled features */
2853         bcm_sysport_set_features(dev, dev->features);
2854
2855         rbuf_init(priv);
2856
2857         /* Set maximum frame length */
2858         if (!priv->is_lite)
2859                 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2860         else
2861                 gib_set_pad_extension(priv);
2862
2863         /* Set MAC address */
2864         umac_set_hw_addr(priv, dev->dev_addr);
2865
2866         umac_enable_set(priv, CMD_RX_EN, 1);
2867
2868         /* TX pipe enable */
2869         topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2870
2871         umac_enable_set(priv, CMD_TX_EN, 1);
2872
2873         ret = tdma_enable_set(priv, 1);
2874         if (ret) {
2875                 netdev_err(dev, "TDMA timeout!\n");
2876                 goto out_free_rx_ring;
2877         }
2878
2879         phy_resume(dev->phydev);
2880
2881         bcm_sysport_netif_start(dev);
2882
2883         netif_device_attach(dev);
2884
2885         return 0;
2886
2887 out_free_rx_ring:
2888         bcm_sysport_fini_rx_ring(priv);
2889 out_free_tx_rings:
2890         for (i = 0; i < dev->num_tx_queues; i++)
2891                 bcm_sysport_fini_tx_ring(priv, i);
2892         clk_disable_unprepare(priv->clk);
2893         return ret;
2894 }
2895
2896 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2897                 bcm_sysport_suspend, bcm_sysport_resume);
2898
2899 static struct platform_driver bcm_sysport_driver = {
2900         .probe  = bcm_sysport_probe,
2901         .remove = bcm_sysport_remove,
2902         .driver =  {
2903                 .name = "brcm-systemport",
2904                 .of_match_table = bcm_sysport_of_match,
2905                 .pm = &bcm_sysport_pm_ops,
2906         },
2907 };
2908 module_platform_driver(bcm_sysport_driver);
2909
2910 MODULE_AUTHOR("Broadcom Corporation");
2911 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2912 MODULE_ALIAS("platform:brcm-systemport");
2913 MODULE_LICENSE("GPL");