1 /* 2 * Broadcom BCM7xxx System Port Ethernet MAC driver 3 * 4 * Copyright (C) 2014 Broadcom Corporation 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 12 13 #include <linux/init.h> 14 #include <linux/interrupt.h> 15 #include <linux/module.h> 16 #include <linux/kernel.h> 17 #include <linux/netdevice.h> 18 #include <linux/etherdevice.h> 19 #include <linux/platform_device.h> 20 #include <linux/of.h> 21 #include <linux/of_net.h> 22 #include <linux/of_mdio.h> 23 #include <linux/phy.h> 24 #include <linux/phy_fixed.h> 25 #include <net/ip.h> 26 #include <net/ipv6.h> 27 28 #include "bcmsysport.h" 29 30 /* I/O accessors register helpers */ 31 #define BCM_SYSPORT_IO_MACRO(name, offset) \ 32 static inline u32 name##_readl(struct bcm_sysport_priv *priv, u32 off) \ 33 { \ 34 u32 reg = __raw_readl(priv->base + offset + off); \ 35 return reg; \ 36 } \ 37 static inline void name##_writel(struct bcm_sysport_priv *priv, \ 38 u32 val, u32 off) \ 39 { \ 40 __raw_writel(val, priv->base + offset + off); \ 41 } \ 42 43 BCM_SYSPORT_IO_MACRO(intrl2_0, SYS_PORT_INTRL2_0_OFFSET); 44 BCM_SYSPORT_IO_MACRO(intrl2_1, SYS_PORT_INTRL2_1_OFFSET); 45 BCM_SYSPORT_IO_MACRO(umac, SYS_PORT_UMAC_OFFSET); 46 BCM_SYSPORT_IO_MACRO(tdma, SYS_PORT_TDMA_OFFSET); 47 BCM_SYSPORT_IO_MACRO(rdma, SYS_PORT_RDMA_OFFSET); 48 BCM_SYSPORT_IO_MACRO(rxchk, SYS_PORT_RXCHK_OFFSET); 49 BCM_SYSPORT_IO_MACRO(txchk, SYS_PORT_TXCHK_OFFSET); 50 BCM_SYSPORT_IO_MACRO(rbuf, SYS_PORT_RBUF_OFFSET); 51 BCM_SYSPORT_IO_MACRO(tbuf, SYS_PORT_TBUF_OFFSET); 52 BCM_SYSPORT_IO_MACRO(topctrl, SYS_PORT_TOPCTRL_OFFSET); 53 54 /* L2-interrupt masking/unmasking helpers, does automatic saving of the applied 55 * mask in a software copy to avoid CPU_MASK_STATUS reads in hot-paths. 56 */ 57 #define BCM_SYSPORT_INTR_L2(which) \ 58 static inline void intrl2_##which##_mask_clear(struct bcm_sysport_priv *priv, \ 59 u32 mask) \ 60 { \ 61 priv->irq##which##_mask &= ~(mask); \ 62 intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR); \ 63 } \ 64 static inline void intrl2_##which##_mask_set(struct bcm_sysport_priv *priv, \ 65 u32 mask) \ 66 { \ 67 intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET); \ 68 priv->irq##which##_mask |= (mask); \ 69 } \ 70 71 BCM_SYSPORT_INTR_L2(0) 72 BCM_SYSPORT_INTR_L2(1) 73 74 /* Register accesses to GISB/RBUS registers are expensive (few hundred 75 * nanoseconds), so keep the check for 64-bits explicit here to save 76 * one register write per-packet on 32-bits platforms. 77 */ 78 static inline void dma_desc_set_addr(struct bcm_sysport_priv *priv, 79 void __iomem *d, 80 dma_addr_t addr) 81 { 82 #ifdef CONFIG_PHYS_ADDR_T_64BIT 83 __raw_writel(upper_32_bits(addr) & DESC_ADDR_HI_MASK, 84 d + DESC_ADDR_HI_STATUS_LEN); 85 #endif 86 __raw_writel(lower_32_bits(addr), d + DESC_ADDR_LO); 87 } 88 89 static inline void tdma_port_write_desc_addr(struct bcm_sysport_priv *priv, 90 struct dma_desc *desc, 91 unsigned int port) 92 { 93 /* Ports are latched, so write upper address first */ 94 tdma_writel(priv, desc->addr_status_len, TDMA_WRITE_PORT_HI(port)); 95 tdma_writel(priv, desc->addr_lo, TDMA_WRITE_PORT_LO(port)); 96 } 97 98 /* Ethtool operations */ 99 static int bcm_sysport_set_rx_csum(struct net_device *dev, 100 netdev_features_t wanted) 101 { 102 struct bcm_sysport_priv *priv = netdev_priv(dev); 103 u32 reg; 104 105 priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM); 106 reg = rxchk_readl(priv, RXCHK_CONTROL); 107 if (priv->rx_chk_en) 108 reg |= RXCHK_EN; 109 else 110 reg &= ~RXCHK_EN; 111 112 /* If UniMAC forwards CRC, we need to skip over it to get 113 * a valid CHK bit to be set in the per-packet status word 114 */ 115 if (priv->rx_chk_en && priv->crc_fwd) 116 reg |= RXCHK_SKIP_FCS; 117 else 118 reg &= ~RXCHK_SKIP_FCS; 119 120 /* If Broadcom tags are enabled (e.g: using a switch), make 121 * sure we tell the RXCHK hardware to expect a 4-bytes Broadcom 122 * tag after the Ethernet MAC Source Address. 123 */ 124 if (netdev_uses_dsa(dev)) 125 reg |= RXCHK_BRCM_TAG_EN; 126 else 127 reg &= ~RXCHK_BRCM_TAG_EN; 128 129 rxchk_writel(priv, reg, RXCHK_CONTROL); 130 131 return 0; 132 } 133 134 static int bcm_sysport_set_tx_csum(struct net_device *dev, 135 netdev_features_t wanted) 136 { 137 struct bcm_sysport_priv *priv = netdev_priv(dev); 138 u32 reg; 139 140 /* Hardware transmit checksum requires us to enable the Transmit status 141 * block prepended to the packet contents 142 */ 143 priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)); 144 reg = tdma_readl(priv, TDMA_CONTROL); 145 if (priv->tsb_en) 146 reg |= TSB_EN; 147 else 148 reg &= ~TSB_EN; 149 tdma_writel(priv, reg, TDMA_CONTROL); 150 151 return 0; 152 } 153 154 static int bcm_sysport_set_features(struct net_device *dev, 155 netdev_features_t features) 156 { 157 netdev_features_t changed = features ^ dev->features; 158 netdev_features_t wanted = dev->wanted_features; 159 int ret = 0; 160 161 if (changed & NETIF_F_RXCSUM) 162 ret = bcm_sysport_set_rx_csum(dev, wanted); 163 if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) 164 ret = bcm_sysport_set_tx_csum(dev, wanted); 165 166 return ret; 167 } 168 169 /* Hardware counters must be kept in sync because the order/offset 170 * is important here (order in structure declaration = order in hardware) 171 */ 172 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = { 173 /* general stats */ 174 STAT_NETDEV(rx_packets), 175 STAT_NETDEV(tx_packets), 176 STAT_NETDEV(rx_bytes), 177 STAT_NETDEV(tx_bytes), 178 STAT_NETDEV(rx_errors), 179 STAT_NETDEV(tx_errors), 180 STAT_NETDEV(rx_dropped), 181 STAT_NETDEV(tx_dropped), 182 STAT_NETDEV(multicast), 183 /* UniMAC RSV counters */ 184 STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64), 185 STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127), 186 STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255), 187 STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511), 188 STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023), 189 STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518), 190 STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv), 191 STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047), 192 STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095), 193 STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216), 194 STAT_MIB_RX("rx_pkts", mib.rx.pkt), 195 STAT_MIB_RX("rx_bytes", mib.rx.bytes), 196 STAT_MIB_RX("rx_multicast", mib.rx.mca), 197 STAT_MIB_RX("rx_broadcast", mib.rx.bca), 198 STAT_MIB_RX("rx_fcs", mib.rx.fcs), 199 STAT_MIB_RX("rx_control", mib.rx.cf), 200 STAT_MIB_RX("rx_pause", mib.rx.pf), 201 STAT_MIB_RX("rx_unknown", mib.rx.uo), 202 STAT_MIB_RX("rx_align", mib.rx.aln), 203 STAT_MIB_RX("rx_outrange", mib.rx.flr), 204 STAT_MIB_RX("rx_code", mib.rx.cde), 205 STAT_MIB_RX("rx_carrier", mib.rx.fcr), 206 STAT_MIB_RX("rx_oversize", mib.rx.ovr), 207 STAT_MIB_RX("rx_jabber", mib.rx.jbr), 208 STAT_MIB_RX("rx_mtu_err", mib.rx.mtue), 209 STAT_MIB_RX("rx_good_pkts", mib.rx.pok), 210 STAT_MIB_RX("rx_unicast", mib.rx.uc), 211 STAT_MIB_RX("rx_ppp", mib.rx.ppp), 212 STAT_MIB_RX("rx_crc", mib.rx.rcrc), 213 /* UniMAC TSV counters */ 214 STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64), 215 STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127), 216 STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255), 217 STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511), 218 STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023), 219 STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518), 220 STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv), 221 STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047), 222 STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095), 223 STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216), 224 STAT_MIB_TX("tx_pkts", mib.tx.pkts), 225 STAT_MIB_TX("tx_multicast", mib.tx.mca), 226 STAT_MIB_TX("tx_broadcast", mib.tx.bca), 227 STAT_MIB_TX("tx_pause", mib.tx.pf), 228 STAT_MIB_TX("tx_control", mib.tx.cf), 229 STAT_MIB_TX("tx_fcs_err", mib.tx.fcs), 230 STAT_MIB_TX("tx_oversize", mib.tx.ovr), 231 STAT_MIB_TX("tx_defer", mib.tx.drf), 232 STAT_MIB_TX("tx_excess_defer", mib.tx.edf), 233 STAT_MIB_TX("tx_single_col", mib.tx.scl), 234 STAT_MIB_TX("tx_multi_col", mib.tx.mcl), 235 STAT_MIB_TX("tx_late_col", mib.tx.lcl), 236 STAT_MIB_TX("tx_excess_col", mib.tx.ecl), 237 STAT_MIB_TX("tx_frags", mib.tx.frg), 238 STAT_MIB_TX("tx_total_col", mib.tx.ncl), 239 STAT_MIB_TX("tx_jabber", mib.tx.jbr), 240 STAT_MIB_TX("tx_bytes", mib.tx.bytes), 241 STAT_MIB_TX("tx_good_pkts", mib.tx.pok), 242 STAT_MIB_TX("tx_unicast", mib.tx.uc), 243 /* UniMAC RUNT counters */ 244 STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt), 245 STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs), 246 STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align), 247 STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes), 248 /* RXCHK misc statistics */ 249 STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR), 250 STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc, 251 RXCHK_OTHER_DISC_CNTR), 252 /* RBUF misc statistics */ 253 STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR), 254 STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR), 255 STAT_MIB_SOFT("alloc_rx_buff_failed", mib.alloc_rx_buff_failed), 256 STAT_MIB_SOFT("rx_dma_failed", mib.rx_dma_failed), 257 STAT_MIB_SOFT("tx_dma_failed", mib.tx_dma_failed), 258 }; 259 260 #define BCM_SYSPORT_STATS_LEN ARRAY_SIZE(bcm_sysport_gstrings_stats) 261 262 static void bcm_sysport_get_drvinfo(struct net_device *dev, 263 struct ethtool_drvinfo *info) 264 { 265 strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); 266 strlcpy(info->version, "0.1", sizeof(info->version)); 267 strlcpy(info->bus_info, "platform", sizeof(info->bus_info)); 268 } 269 270 static u32 bcm_sysport_get_msglvl(struct net_device *dev) 271 { 272 struct bcm_sysport_priv *priv = netdev_priv(dev); 273 274 return priv->msg_enable; 275 } 276 277 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable) 278 { 279 struct bcm_sysport_priv *priv = netdev_priv(dev); 280 281 priv->msg_enable = enable; 282 } 283 284 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set) 285 { 286 switch (string_set) { 287 case ETH_SS_STATS: 288 return BCM_SYSPORT_STATS_LEN; 289 default: 290 return -EOPNOTSUPP; 291 } 292 } 293 294 static void bcm_sysport_get_strings(struct net_device *dev, 295 u32 stringset, u8 *data) 296 { 297 int i; 298 299 switch (stringset) { 300 case ETH_SS_STATS: 301 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) { 302 memcpy(data + i * ETH_GSTRING_LEN, 303 bcm_sysport_gstrings_stats[i].stat_string, 304 ETH_GSTRING_LEN); 305 } 306 break; 307 default: 308 break; 309 } 310 } 311 312 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv) 313 { 314 int i, j = 0; 315 316 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) { 317 const struct bcm_sysport_stats *s; 318 u8 offset = 0; 319 u32 val = 0; 320 char *p; 321 322 s = &bcm_sysport_gstrings_stats[i]; 323 switch (s->type) { 324 case BCM_SYSPORT_STAT_NETDEV: 325 case BCM_SYSPORT_STAT_SOFT: 326 continue; 327 case BCM_SYSPORT_STAT_MIB_RX: 328 case BCM_SYSPORT_STAT_MIB_TX: 329 case BCM_SYSPORT_STAT_RUNT: 330 if (s->type != BCM_SYSPORT_STAT_MIB_RX) 331 offset = UMAC_MIB_STAT_OFFSET; 332 val = umac_readl(priv, UMAC_MIB_START + j + offset); 333 break; 334 case BCM_SYSPORT_STAT_RXCHK: 335 val = rxchk_readl(priv, s->reg_offset); 336 if (val == ~0) 337 rxchk_writel(priv, 0, s->reg_offset); 338 break; 339 case BCM_SYSPORT_STAT_RBUF: 340 val = rbuf_readl(priv, s->reg_offset); 341 if (val == ~0) 342 rbuf_writel(priv, 0, s->reg_offset); 343 break; 344 } 345 346 j += s->stat_sizeof; 347 p = (char *)priv + s->stat_offset; 348 *(u32 *)p = val; 349 } 350 351 netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n"); 352 } 353 354 static void bcm_sysport_get_stats(struct net_device *dev, 355 struct ethtool_stats *stats, u64 *data) 356 { 357 struct bcm_sysport_priv *priv = netdev_priv(dev); 358 int i; 359 360 if (netif_running(dev)) 361 bcm_sysport_update_mib_counters(priv); 362 363 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) { 364 const struct bcm_sysport_stats *s; 365 char *p; 366 367 s = &bcm_sysport_gstrings_stats[i]; 368 if (s->type == BCM_SYSPORT_STAT_NETDEV) 369 p = (char *)&dev->stats; 370 else 371 p = (char *)priv; 372 p += s->stat_offset; 373 data[i] = *(unsigned long *)p; 374 } 375 } 376 377 static void bcm_sysport_get_wol(struct net_device *dev, 378 struct ethtool_wolinfo *wol) 379 { 380 struct bcm_sysport_priv *priv = netdev_priv(dev); 381 u32 reg; 382 383 wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE; 384 wol->wolopts = priv->wolopts; 385 386 if (!(priv->wolopts & WAKE_MAGICSECURE)) 387 return; 388 389 /* Return the programmed SecureOn password */ 390 reg = umac_readl(priv, UMAC_PSW_MS); 391 put_unaligned_be16(reg, &wol->sopass[0]); 392 reg = umac_readl(priv, UMAC_PSW_LS); 393 put_unaligned_be32(reg, &wol->sopass[2]); 394 } 395 396 static int bcm_sysport_set_wol(struct net_device *dev, 397 struct ethtool_wolinfo *wol) 398 { 399 struct bcm_sysport_priv *priv = netdev_priv(dev); 400 struct device *kdev = &priv->pdev->dev; 401 u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE; 402 403 if (!device_can_wakeup(kdev)) 404 return -ENOTSUPP; 405 406 if (wol->wolopts & ~supported) 407 return -EINVAL; 408 409 /* Program the SecureOn password */ 410 if (wol->wolopts & WAKE_MAGICSECURE) { 411 umac_writel(priv, get_unaligned_be16(&wol->sopass[0]), 412 UMAC_PSW_MS); 413 umac_writel(priv, get_unaligned_be32(&wol->sopass[2]), 414 UMAC_PSW_LS); 415 } 416 417 /* Flag the device and relevant IRQ as wakeup capable */ 418 if (wol->wolopts) { 419 device_set_wakeup_enable(kdev, 1); 420 if (priv->wol_irq_disabled) 421 enable_irq_wake(priv->wol_irq); 422 priv->wol_irq_disabled = 0; 423 } else { 424 device_set_wakeup_enable(kdev, 0); 425 /* Avoid unbalanced disable_irq_wake calls */ 426 if (!priv->wol_irq_disabled) 427 disable_irq_wake(priv->wol_irq); 428 priv->wol_irq_disabled = 1; 429 } 430 431 priv->wolopts = wol->wolopts; 432 433 return 0; 434 } 435 436 static int bcm_sysport_get_coalesce(struct net_device *dev, 437 struct ethtool_coalesce *ec) 438 { 439 struct bcm_sysport_priv *priv = netdev_priv(dev); 440 u32 reg; 441 442 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0)); 443 444 ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000; 445 ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK; 446 447 reg = rdma_readl(priv, RDMA_MBDONE_INTR); 448 449 ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000; 450 ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK; 451 452 return 0; 453 } 454 455 static int bcm_sysport_set_coalesce(struct net_device *dev, 456 struct ethtool_coalesce *ec) 457 { 458 struct bcm_sysport_priv *priv = netdev_priv(dev); 459 unsigned int i; 460 u32 reg; 461 462 /* Base system clock is 125Mhz, DMA timeout is this reference clock 463 * divided by 1024, which yield roughly 8.192 us, our maximum value has 464 * to fit in the RING_TIMEOUT_MASK (16 bits). 465 */ 466 if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK || 467 ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 || 468 ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK || 469 ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1) 470 return -EINVAL; 471 472 if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) || 473 (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0)) 474 return -EINVAL; 475 476 for (i = 0; i < dev->num_tx_queues; i++) { 477 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(i)); 478 reg &= ~(RING_INTR_THRESH_MASK | 479 RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT); 480 reg |= ec->tx_max_coalesced_frames; 481 reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) << 482 RING_TIMEOUT_SHIFT; 483 tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(i)); 484 } 485 486 reg = rdma_readl(priv, RDMA_MBDONE_INTR); 487 reg &= ~(RDMA_INTR_THRESH_MASK | 488 RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT); 489 reg |= ec->rx_max_coalesced_frames; 490 reg |= DIV_ROUND_UP(ec->rx_coalesce_usecs * 1000, 8192) << 491 RDMA_TIMEOUT_SHIFT; 492 rdma_writel(priv, reg, RDMA_MBDONE_INTR); 493 494 return 0; 495 } 496 497 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb) 498 { 499 dev_kfree_skb_any(cb->skb); 500 cb->skb = NULL; 501 dma_unmap_addr_set(cb, dma_addr, 0); 502 } 503 504 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv, 505 struct bcm_sysport_cb *cb) 506 { 507 struct device *kdev = &priv->pdev->dev; 508 struct net_device *ndev = priv->netdev; 509 struct sk_buff *skb, *rx_skb; 510 dma_addr_t mapping; 511 512 /* Allocate a new SKB for a new packet */ 513 skb = netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH); 514 if (!skb) { 515 priv->mib.alloc_rx_buff_failed++; 516 netif_err(priv, rx_err, ndev, "SKB alloc failed\n"); 517 return NULL; 518 } 519 520 mapping = dma_map_single(kdev, skb->data, 521 RX_BUF_LENGTH, DMA_FROM_DEVICE); 522 if (dma_mapping_error(kdev, mapping)) { 523 priv->mib.rx_dma_failed++; 524 dev_kfree_skb_any(skb); 525 netif_err(priv, rx_err, ndev, "DMA mapping failure\n"); 526 return NULL; 527 } 528 529 /* Grab the current SKB on the ring */ 530 rx_skb = cb->skb; 531 if (likely(rx_skb)) 532 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr), 533 RX_BUF_LENGTH, DMA_FROM_DEVICE); 534 535 /* Put the new SKB on the ring */ 536 cb->skb = skb; 537 dma_unmap_addr_set(cb, dma_addr, mapping); 538 dma_desc_set_addr(priv, cb->bd_addr, mapping); 539 540 netif_dbg(priv, rx_status, ndev, "RX refill\n"); 541 542 /* Return the current SKB to the caller */ 543 return rx_skb; 544 } 545 546 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv) 547 { 548 struct bcm_sysport_cb *cb; 549 struct sk_buff *skb; 550 unsigned int i; 551 552 for (i = 0; i < priv->num_rx_bds; i++) { 553 cb = &priv->rx_cbs[i]; 554 skb = bcm_sysport_rx_refill(priv, cb); 555 if (skb) 556 dev_kfree_skb(skb); 557 if (!cb->skb) 558 return -ENOMEM; 559 } 560 561 return 0; 562 } 563 564 /* Poll the hardware for up to budget packets to process */ 565 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv, 566 unsigned int budget) 567 { 568 struct net_device *ndev = priv->netdev; 569 unsigned int processed = 0, to_process; 570 struct bcm_sysport_cb *cb; 571 struct sk_buff *skb; 572 unsigned int p_index; 573 u16 len, status; 574 struct bcm_rsb *rsb; 575 576 /* Determine how much we should process since last call */ 577 p_index = rdma_readl(priv, RDMA_PROD_INDEX); 578 p_index &= RDMA_PROD_INDEX_MASK; 579 580 if (p_index < priv->rx_c_index) 581 to_process = (RDMA_CONS_INDEX_MASK + 1) - 582 priv->rx_c_index + p_index; 583 else 584 to_process = p_index - priv->rx_c_index; 585 586 netif_dbg(priv, rx_status, ndev, 587 "p_index=%d rx_c_index=%d to_process=%d\n", 588 p_index, priv->rx_c_index, to_process); 589 590 while ((processed < to_process) && (processed < budget)) { 591 cb = &priv->rx_cbs[priv->rx_read_ptr]; 592 skb = bcm_sysport_rx_refill(priv, cb); 593 594 595 /* We do not have a backing SKB, so we do not a corresponding 596 * DMA mapping for this incoming packet since 597 * bcm_sysport_rx_refill always either has both skb and mapping 598 * or none. 599 */ 600 if (unlikely(!skb)) { 601 netif_err(priv, rx_err, ndev, "out of memory!\n"); 602 ndev->stats.rx_dropped++; 603 ndev->stats.rx_errors++; 604 goto next; 605 } 606 607 /* Extract the Receive Status Block prepended */ 608 rsb = (struct bcm_rsb *)skb->data; 609 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK; 610 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) & 611 DESC_STATUS_MASK; 612 613 netif_dbg(priv, rx_status, ndev, 614 "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n", 615 p_index, priv->rx_c_index, priv->rx_read_ptr, 616 len, status); 617 618 if (unlikely(len > RX_BUF_LENGTH)) { 619 netif_err(priv, rx_status, ndev, "oversized packet\n"); 620 ndev->stats.rx_length_errors++; 621 ndev->stats.rx_errors++; 622 dev_kfree_skb_any(skb); 623 goto next; 624 } 625 626 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) { 627 netif_err(priv, rx_status, ndev, "fragmented packet!\n"); 628 ndev->stats.rx_dropped++; 629 ndev->stats.rx_errors++; 630 dev_kfree_skb_any(skb); 631 goto next; 632 } 633 634 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) { 635 netif_err(priv, rx_err, ndev, "error packet\n"); 636 if (status & RX_STATUS_OVFLOW) 637 ndev->stats.rx_over_errors++; 638 ndev->stats.rx_dropped++; 639 ndev->stats.rx_errors++; 640 dev_kfree_skb_any(skb); 641 goto next; 642 } 643 644 skb_put(skb, len); 645 646 /* Hardware validated our checksum */ 647 if (likely(status & DESC_L4_CSUM)) 648 skb->ip_summed = CHECKSUM_UNNECESSARY; 649 650 /* Hardware pre-pends packets with 2bytes before Ethernet 651 * header plus we have the Receive Status Block, strip off all 652 * of this from the SKB. 653 */ 654 skb_pull(skb, sizeof(*rsb) + 2); 655 len -= (sizeof(*rsb) + 2); 656 657 /* UniMAC may forward CRC */ 658 if (priv->crc_fwd) { 659 skb_trim(skb, len - ETH_FCS_LEN); 660 len -= ETH_FCS_LEN; 661 } 662 663 skb->protocol = eth_type_trans(skb, ndev); 664 ndev->stats.rx_packets++; 665 ndev->stats.rx_bytes += len; 666 667 napi_gro_receive(&priv->napi, skb); 668 next: 669 processed++; 670 priv->rx_read_ptr++; 671 672 if (priv->rx_read_ptr == priv->num_rx_bds) 673 priv->rx_read_ptr = 0; 674 } 675 676 return processed; 677 } 678 679 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_priv *priv, 680 struct bcm_sysport_cb *cb, 681 unsigned int *bytes_compl, 682 unsigned int *pkts_compl) 683 { 684 struct device *kdev = &priv->pdev->dev; 685 struct net_device *ndev = priv->netdev; 686 687 if (cb->skb) { 688 ndev->stats.tx_bytes += cb->skb->len; 689 *bytes_compl += cb->skb->len; 690 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr), 691 dma_unmap_len(cb, dma_len), 692 DMA_TO_DEVICE); 693 ndev->stats.tx_packets++; 694 (*pkts_compl)++; 695 bcm_sysport_free_cb(cb); 696 /* SKB fragment */ 697 } else if (dma_unmap_addr(cb, dma_addr)) { 698 ndev->stats.tx_bytes += dma_unmap_len(cb, dma_len); 699 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr), 700 dma_unmap_len(cb, dma_len), DMA_TO_DEVICE); 701 dma_unmap_addr_set(cb, dma_addr, 0); 702 } 703 } 704 705 /* Reclaim queued SKBs for transmission completion, lockless version */ 706 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv, 707 struct bcm_sysport_tx_ring *ring) 708 { 709 struct net_device *ndev = priv->netdev; 710 unsigned int c_index, last_c_index, last_tx_cn, num_tx_cbs; 711 unsigned int pkts_compl = 0, bytes_compl = 0; 712 struct bcm_sysport_cb *cb; 713 struct netdev_queue *txq; 714 u32 hw_ind; 715 716 txq = netdev_get_tx_queue(ndev, ring->index); 717 718 /* Compute how many descriptors have been processed since last call */ 719 hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index)); 720 c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK; 721 ring->p_index = (hw_ind & RING_PROD_INDEX_MASK); 722 723 last_c_index = ring->c_index; 724 num_tx_cbs = ring->size; 725 726 c_index &= (num_tx_cbs - 1); 727 728 if (c_index >= last_c_index) 729 last_tx_cn = c_index - last_c_index; 730 else 731 last_tx_cn = num_tx_cbs - last_c_index + c_index; 732 733 netif_dbg(priv, tx_done, ndev, 734 "ring=%d c_index=%d last_tx_cn=%d last_c_index=%d\n", 735 ring->index, c_index, last_tx_cn, last_c_index); 736 737 while (last_tx_cn-- > 0) { 738 cb = ring->cbs + last_c_index; 739 bcm_sysport_tx_reclaim_one(priv, cb, &bytes_compl, &pkts_compl); 740 741 ring->desc_count++; 742 last_c_index++; 743 last_c_index &= (num_tx_cbs - 1); 744 } 745 746 ring->c_index = c_index; 747 748 if (netif_tx_queue_stopped(txq) && pkts_compl) 749 netif_tx_wake_queue(txq); 750 751 netif_dbg(priv, tx_done, ndev, 752 "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n", 753 ring->index, ring->c_index, pkts_compl, bytes_compl); 754 755 return pkts_compl; 756 } 757 758 /* Locked version of the per-ring TX reclaim routine */ 759 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv, 760 struct bcm_sysport_tx_ring *ring) 761 { 762 unsigned int released; 763 unsigned long flags; 764 765 spin_lock_irqsave(&ring->lock, flags); 766 released = __bcm_sysport_tx_reclaim(priv, ring); 767 spin_unlock_irqrestore(&ring->lock, flags); 768 769 return released; 770 } 771 772 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget) 773 { 774 struct bcm_sysport_tx_ring *ring = 775 container_of(napi, struct bcm_sysport_tx_ring, napi); 776 unsigned int work_done = 0; 777 778 work_done = bcm_sysport_tx_reclaim(ring->priv, ring); 779 780 if (work_done == 0) { 781 napi_complete(napi); 782 /* re-enable TX interrupt */ 783 intrl2_1_mask_clear(ring->priv, BIT(ring->index)); 784 785 return 0; 786 } 787 788 return budget; 789 } 790 791 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv) 792 { 793 unsigned int q; 794 795 for (q = 0; q < priv->netdev->num_tx_queues; q++) 796 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]); 797 } 798 799 static int bcm_sysport_poll(struct napi_struct *napi, int budget) 800 { 801 struct bcm_sysport_priv *priv = 802 container_of(napi, struct bcm_sysport_priv, napi); 803 unsigned int work_done = 0; 804 805 work_done = bcm_sysport_desc_rx(priv, budget); 806 807 priv->rx_c_index += work_done; 808 priv->rx_c_index &= RDMA_CONS_INDEX_MASK; 809 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX); 810 811 if (work_done < budget) { 812 napi_complete_done(napi, work_done); 813 /* re-enable RX interrupts */ 814 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE); 815 } 816 817 return work_done; 818 } 819 820 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv) 821 { 822 u32 reg; 823 824 /* Stop monitoring MPD interrupt */ 825 intrl2_0_mask_set(priv, INTRL2_0_MPD); 826 827 /* Clear the MagicPacket detection logic */ 828 reg = umac_readl(priv, UMAC_MPD_CTRL); 829 reg &= ~MPD_EN; 830 umac_writel(priv, reg, UMAC_MPD_CTRL); 831 832 netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n"); 833 } 834 835 /* RX and misc interrupt routine */ 836 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id) 837 { 838 struct net_device *dev = dev_id; 839 struct bcm_sysport_priv *priv = netdev_priv(dev); 840 841 priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) & 842 ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS); 843 intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR); 844 845 if (unlikely(priv->irq0_stat == 0)) { 846 netdev_warn(priv->netdev, "spurious RX interrupt\n"); 847 return IRQ_NONE; 848 } 849 850 if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) { 851 if (likely(napi_schedule_prep(&priv->napi))) { 852 /* disable RX interrupts */ 853 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE); 854 __napi_schedule_irqoff(&priv->napi); 855 } 856 } 857 858 /* TX ring is full, perform a full reclaim since we do not know 859 * which one would trigger this interrupt 860 */ 861 if (priv->irq0_stat & INTRL2_0_TX_RING_FULL) 862 bcm_sysport_tx_reclaim_all(priv); 863 864 if (priv->irq0_stat & INTRL2_0_MPD) { 865 netdev_info(priv->netdev, "Wake-on-LAN interrupt!\n"); 866 bcm_sysport_resume_from_wol(priv); 867 } 868 869 return IRQ_HANDLED; 870 } 871 872 /* TX interrupt service routine */ 873 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id) 874 { 875 struct net_device *dev = dev_id; 876 struct bcm_sysport_priv *priv = netdev_priv(dev); 877 struct bcm_sysport_tx_ring *txr; 878 unsigned int ring; 879 880 priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) & 881 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS); 882 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); 883 884 if (unlikely(priv->irq1_stat == 0)) { 885 netdev_warn(priv->netdev, "spurious TX interrupt\n"); 886 return IRQ_NONE; 887 } 888 889 for (ring = 0; ring < dev->num_tx_queues; ring++) { 890 if (!(priv->irq1_stat & BIT(ring))) 891 continue; 892 893 txr = &priv->tx_rings[ring]; 894 895 if (likely(napi_schedule_prep(&txr->napi))) { 896 intrl2_1_mask_set(priv, BIT(ring)); 897 __napi_schedule_irqoff(&txr->napi); 898 } 899 } 900 901 return IRQ_HANDLED; 902 } 903 904 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id) 905 { 906 struct bcm_sysport_priv *priv = dev_id; 907 908 pm_wakeup_event(&priv->pdev->dev, 0); 909 910 return IRQ_HANDLED; 911 } 912 913 #ifdef CONFIG_NET_POLL_CONTROLLER 914 static void bcm_sysport_poll_controller(struct net_device *dev) 915 { 916 struct bcm_sysport_priv *priv = netdev_priv(dev); 917 918 disable_irq(priv->irq0); 919 bcm_sysport_rx_isr(priv->irq0, priv); 920 enable_irq(priv->irq0); 921 922 disable_irq(priv->irq1); 923 bcm_sysport_tx_isr(priv->irq1, priv); 924 enable_irq(priv->irq1); 925 } 926 #endif 927 928 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb, 929 struct net_device *dev) 930 { 931 struct sk_buff *nskb; 932 struct bcm_tsb *tsb; 933 u32 csum_info; 934 u8 ip_proto; 935 u16 csum_start; 936 u16 ip_ver; 937 938 /* Re-allocate SKB if needed */ 939 if (unlikely(skb_headroom(skb) < sizeof(*tsb))) { 940 nskb = skb_realloc_headroom(skb, sizeof(*tsb)); 941 dev_kfree_skb(skb); 942 if (!nskb) { 943 dev->stats.tx_errors++; 944 dev->stats.tx_dropped++; 945 return NULL; 946 } 947 skb = nskb; 948 } 949 950 tsb = (struct bcm_tsb *)skb_push(skb, sizeof(*tsb)); 951 /* Zero-out TSB by default */ 952 memset(tsb, 0, sizeof(*tsb)); 953 954 if (skb->ip_summed == CHECKSUM_PARTIAL) { 955 ip_ver = htons(skb->protocol); 956 switch (ip_ver) { 957 case ETH_P_IP: 958 ip_proto = ip_hdr(skb)->protocol; 959 break; 960 case ETH_P_IPV6: 961 ip_proto = ipv6_hdr(skb)->nexthdr; 962 break; 963 default: 964 return skb; 965 } 966 967 /* Get the checksum offset and the L4 (transport) offset */ 968 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb); 969 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK; 970 csum_info |= (csum_start << L4_PTR_SHIFT); 971 972 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) { 973 csum_info |= L4_LENGTH_VALID; 974 if (ip_proto == IPPROTO_UDP && ip_ver == ETH_P_IP) 975 csum_info |= L4_UDP; 976 } else { 977 csum_info = 0; 978 } 979 980 tsb->l4_ptr_dest_map = csum_info; 981 } 982 983 return skb; 984 } 985 986 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb, 987 struct net_device *dev) 988 { 989 struct bcm_sysport_priv *priv = netdev_priv(dev); 990 struct device *kdev = &priv->pdev->dev; 991 struct bcm_sysport_tx_ring *ring; 992 struct bcm_sysport_cb *cb; 993 struct netdev_queue *txq; 994 struct dma_desc *desc; 995 unsigned int skb_len; 996 unsigned long flags; 997 dma_addr_t mapping; 998 u32 len_status; 999 u16 queue; 1000 int ret; 1001 1002 queue = skb_get_queue_mapping(skb); 1003 txq = netdev_get_tx_queue(dev, queue); 1004 ring = &priv->tx_rings[queue]; 1005 1006 /* lock against tx reclaim in BH context and TX ring full interrupt */ 1007 spin_lock_irqsave(&ring->lock, flags); 1008 if (unlikely(ring->desc_count == 0)) { 1009 netif_tx_stop_queue(txq); 1010 netdev_err(dev, "queue %d awake and ring full!\n", queue); 1011 ret = NETDEV_TX_BUSY; 1012 goto out; 1013 } 1014 1015 /* The Ethernet switch we are interfaced with needs packets to be at 1016 * least 64 bytes (including FCS) otherwise they will be discarded when 1017 * they enter the switch port logic. When Broadcom tags are enabled, we 1018 * need to make sure that packets are at least 68 bytes 1019 * (including FCS and tag) because the length verification is done after 1020 * the Broadcom tag is stripped off the ingress packet. 1021 */ 1022 if (skb_put_padto(skb, ETH_ZLEN + ENET_BRCM_TAG_LEN)) { 1023 ret = NETDEV_TX_OK; 1024 goto out; 1025 } 1026 1027 /* Insert TSB and checksum infos */ 1028 if (priv->tsb_en) { 1029 skb = bcm_sysport_insert_tsb(skb, dev); 1030 if (!skb) { 1031 ret = NETDEV_TX_OK; 1032 goto out; 1033 } 1034 } 1035 1036 skb_len = skb->len; 1037 1038 mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE); 1039 if (dma_mapping_error(kdev, mapping)) { 1040 priv->mib.tx_dma_failed++; 1041 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n", 1042 skb->data, skb_len); 1043 ret = NETDEV_TX_OK; 1044 goto out; 1045 } 1046 1047 /* Remember the SKB for future freeing */ 1048 cb = &ring->cbs[ring->curr_desc]; 1049 cb->skb = skb; 1050 dma_unmap_addr_set(cb, dma_addr, mapping); 1051 dma_unmap_len_set(cb, dma_len, skb_len); 1052 1053 /* Fetch a descriptor entry from our pool */ 1054 desc = ring->desc_cpu; 1055 1056 desc->addr_lo = lower_32_bits(mapping); 1057 len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK; 1058 len_status |= (skb_len << DESC_LEN_SHIFT); 1059 len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) << 1060 DESC_STATUS_SHIFT; 1061 if (skb->ip_summed == CHECKSUM_PARTIAL) 1062 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT); 1063 1064 ring->curr_desc++; 1065 if (ring->curr_desc == ring->size) 1066 ring->curr_desc = 0; 1067 ring->desc_count--; 1068 1069 /* Ensure write completion of the descriptor status/length 1070 * in DRAM before the System Port WRITE_PORT register latches 1071 * the value 1072 */ 1073 wmb(); 1074 desc->addr_status_len = len_status; 1075 wmb(); 1076 1077 /* Write this descriptor address to the RING write port */ 1078 tdma_port_write_desc_addr(priv, desc, ring->index); 1079 1080 /* Check ring space and update SW control flow */ 1081 if (ring->desc_count == 0) 1082 netif_tx_stop_queue(txq); 1083 1084 netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n", 1085 ring->index, ring->desc_count, ring->curr_desc); 1086 1087 ret = NETDEV_TX_OK; 1088 out: 1089 spin_unlock_irqrestore(&ring->lock, flags); 1090 return ret; 1091 } 1092 1093 static void bcm_sysport_tx_timeout(struct net_device *dev) 1094 { 1095 netdev_warn(dev, "transmit timeout!\n"); 1096 1097 netif_trans_update(dev); 1098 dev->stats.tx_errors++; 1099 1100 netif_tx_wake_all_queues(dev); 1101 } 1102 1103 /* phylib adjust link callback */ 1104 static void bcm_sysport_adj_link(struct net_device *dev) 1105 { 1106 struct bcm_sysport_priv *priv = netdev_priv(dev); 1107 struct phy_device *phydev = dev->phydev; 1108 unsigned int changed = 0; 1109 u32 cmd_bits = 0, reg; 1110 1111 if (priv->old_link != phydev->link) { 1112 changed = 1; 1113 priv->old_link = phydev->link; 1114 } 1115 1116 if (priv->old_duplex != phydev->duplex) { 1117 changed = 1; 1118 priv->old_duplex = phydev->duplex; 1119 } 1120 1121 switch (phydev->speed) { 1122 case SPEED_2500: 1123 cmd_bits = CMD_SPEED_2500; 1124 break; 1125 case SPEED_1000: 1126 cmd_bits = CMD_SPEED_1000; 1127 break; 1128 case SPEED_100: 1129 cmd_bits = CMD_SPEED_100; 1130 break; 1131 case SPEED_10: 1132 cmd_bits = CMD_SPEED_10; 1133 break; 1134 default: 1135 break; 1136 } 1137 cmd_bits <<= CMD_SPEED_SHIFT; 1138 1139 if (phydev->duplex == DUPLEX_HALF) 1140 cmd_bits |= CMD_HD_EN; 1141 1142 if (priv->old_pause != phydev->pause) { 1143 changed = 1; 1144 priv->old_pause = phydev->pause; 1145 } 1146 1147 if (!phydev->pause) 1148 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE; 1149 1150 if (!changed) 1151 return; 1152 1153 if (phydev->link) { 1154 reg = umac_readl(priv, UMAC_CMD); 1155 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) | 1156 CMD_HD_EN | CMD_RX_PAUSE_IGNORE | 1157 CMD_TX_PAUSE_IGNORE); 1158 reg |= cmd_bits; 1159 umac_writel(priv, reg, UMAC_CMD); 1160 } 1161 1162 phy_print_status(phydev); 1163 } 1164 1165 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv, 1166 unsigned int index) 1167 { 1168 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index]; 1169 struct device *kdev = &priv->pdev->dev; 1170 size_t size; 1171 void *p; 1172 u32 reg; 1173 1174 /* Simple descriptors partitioning for now */ 1175 size = 256; 1176 1177 /* We just need one DMA descriptor which is DMA-able, since writing to 1178 * the port will allocate a new descriptor in its internal linked-list 1179 */ 1180 p = dma_zalloc_coherent(kdev, sizeof(struct dma_desc), &ring->desc_dma, 1181 GFP_KERNEL); 1182 if (!p) { 1183 netif_err(priv, hw, priv->netdev, "DMA alloc failed\n"); 1184 return -ENOMEM; 1185 } 1186 1187 ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL); 1188 if (!ring->cbs) { 1189 netif_err(priv, hw, priv->netdev, "CB allocation failed\n"); 1190 return -ENOMEM; 1191 } 1192 1193 /* Initialize SW view of the ring */ 1194 spin_lock_init(&ring->lock); 1195 ring->priv = priv; 1196 netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64); 1197 ring->index = index; 1198 ring->size = size; 1199 ring->alloc_size = ring->size; 1200 ring->desc_cpu = p; 1201 ring->desc_count = ring->size; 1202 ring->curr_desc = 0; 1203 1204 /* Initialize HW ring */ 1205 tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index)); 1206 tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index)); 1207 tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index)); 1208 tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index)); 1209 tdma_writel(priv, RING_IGNORE_STATUS, TDMA_DESC_RING_MAPPING(index)); 1210 tdma_writel(priv, 0, TDMA_DESC_RING_PCP_DEI_VID(index)); 1211 1212 /* Program the number of descriptors as MAX_THRESHOLD and half of 1213 * its size for the hysteresis trigger 1214 */ 1215 tdma_writel(priv, ring->size | 1216 1 << RING_HYST_THRESH_SHIFT, 1217 TDMA_DESC_RING_MAX_HYST(index)); 1218 1219 /* Enable the ring queue in the arbiter */ 1220 reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN); 1221 reg |= (1 << index); 1222 tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN); 1223 1224 napi_enable(&ring->napi); 1225 1226 netif_dbg(priv, hw, priv->netdev, 1227 "TDMA cfg, size=%d, desc_cpu=%p\n", 1228 ring->size, ring->desc_cpu); 1229 1230 return 0; 1231 } 1232 1233 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv, 1234 unsigned int index) 1235 { 1236 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index]; 1237 struct device *kdev = &priv->pdev->dev; 1238 u32 reg; 1239 1240 /* Caller should stop the TDMA engine */ 1241 reg = tdma_readl(priv, TDMA_STATUS); 1242 if (!(reg & TDMA_DISABLED)) 1243 netdev_warn(priv->netdev, "TDMA not stopped!\n"); 1244 1245 /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could 1246 * fail, so by checking this pointer we know whether the TX ring was 1247 * fully initialized or not. 1248 */ 1249 if (!ring->cbs) 1250 return; 1251 1252 napi_disable(&ring->napi); 1253 netif_napi_del(&ring->napi); 1254 1255 bcm_sysport_tx_reclaim(priv, ring); 1256 1257 kfree(ring->cbs); 1258 ring->cbs = NULL; 1259 1260 if (ring->desc_dma) { 1261 dma_free_coherent(kdev, sizeof(struct dma_desc), 1262 ring->desc_cpu, ring->desc_dma); 1263 ring->desc_dma = 0; 1264 } 1265 ring->size = 0; 1266 ring->alloc_size = 0; 1267 1268 netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n"); 1269 } 1270 1271 /* RDMA helper */ 1272 static inline int rdma_enable_set(struct bcm_sysport_priv *priv, 1273 unsigned int enable) 1274 { 1275 unsigned int timeout = 1000; 1276 u32 reg; 1277 1278 reg = rdma_readl(priv, RDMA_CONTROL); 1279 if (enable) 1280 reg |= RDMA_EN; 1281 else 1282 reg &= ~RDMA_EN; 1283 rdma_writel(priv, reg, RDMA_CONTROL); 1284 1285 /* Poll for RMDA disabling completion */ 1286 do { 1287 reg = rdma_readl(priv, RDMA_STATUS); 1288 if (!!(reg & RDMA_DISABLED) == !enable) 1289 return 0; 1290 usleep_range(1000, 2000); 1291 } while (timeout-- > 0); 1292 1293 netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n"); 1294 1295 return -ETIMEDOUT; 1296 } 1297 1298 /* TDMA helper */ 1299 static inline int tdma_enable_set(struct bcm_sysport_priv *priv, 1300 unsigned int enable) 1301 { 1302 unsigned int timeout = 1000; 1303 u32 reg; 1304 1305 reg = tdma_readl(priv, TDMA_CONTROL); 1306 if (enable) 1307 reg |= TDMA_EN; 1308 else 1309 reg &= ~TDMA_EN; 1310 tdma_writel(priv, reg, TDMA_CONTROL); 1311 1312 /* Poll for TMDA disabling completion */ 1313 do { 1314 reg = tdma_readl(priv, TDMA_STATUS); 1315 if (!!(reg & TDMA_DISABLED) == !enable) 1316 return 0; 1317 1318 usleep_range(1000, 2000); 1319 } while (timeout-- > 0); 1320 1321 netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n"); 1322 1323 return -ETIMEDOUT; 1324 } 1325 1326 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv) 1327 { 1328 struct bcm_sysport_cb *cb; 1329 u32 reg; 1330 int ret; 1331 int i; 1332 1333 /* Initialize SW view of the RX ring */ 1334 priv->num_rx_bds = NUM_RX_DESC; 1335 priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET; 1336 priv->rx_c_index = 0; 1337 priv->rx_read_ptr = 0; 1338 priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb), 1339 GFP_KERNEL); 1340 if (!priv->rx_cbs) { 1341 netif_err(priv, hw, priv->netdev, "CB allocation failed\n"); 1342 return -ENOMEM; 1343 } 1344 1345 for (i = 0; i < priv->num_rx_bds; i++) { 1346 cb = priv->rx_cbs + i; 1347 cb->bd_addr = priv->rx_bds + i * DESC_SIZE; 1348 } 1349 1350 ret = bcm_sysport_alloc_rx_bufs(priv); 1351 if (ret) { 1352 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n"); 1353 return ret; 1354 } 1355 1356 /* Initialize HW, ensure RDMA is disabled */ 1357 reg = rdma_readl(priv, RDMA_STATUS); 1358 if (!(reg & RDMA_DISABLED)) 1359 rdma_enable_set(priv, 0); 1360 1361 rdma_writel(priv, 0, RDMA_WRITE_PTR_LO); 1362 rdma_writel(priv, 0, RDMA_WRITE_PTR_HI); 1363 rdma_writel(priv, 0, RDMA_PROD_INDEX); 1364 rdma_writel(priv, 0, RDMA_CONS_INDEX); 1365 rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT | 1366 RX_BUF_LENGTH, RDMA_RING_BUF_SIZE); 1367 /* Operate the queue in ring mode */ 1368 rdma_writel(priv, 0, RDMA_START_ADDR_HI); 1369 rdma_writel(priv, 0, RDMA_START_ADDR_LO); 1370 rdma_writel(priv, 0, RDMA_END_ADDR_HI); 1371 rdma_writel(priv, NUM_HW_RX_DESC_WORDS - 1, RDMA_END_ADDR_LO); 1372 1373 rdma_writel(priv, 1, RDMA_MBDONE_INTR); 1374 1375 netif_dbg(priv, hw, priv->netdev, 1376 "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n", 1377 priv->num_rx_bds, priv->rx_bds); 1378 1379 return 0; 1380 } 1381 1382 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv) 1383 { 1384 struct bcm_sysport_cb *cb; 1385 unsigned int i; 1386 u32 reg; 1387 1388 /* Caller should ensure RDMA is disabled */ 1389 reg = rdma_readl(priv, RDMA_STATUS); 1390 if (!(reg & RDMA_DISABLED)) 1391 netdev_warn(priv->netdev, "RDMA not stopped!\n"); 1392 1393 for (i = 0; i < priv->num_rx_bds; i++) { 1394 cb = &priv->rx_cbs[i]; 1395 if (dma_unmap_addr(cb, dma_addr)) 1396 dma_unmap_single(&priv->pdev->dev, 1397 dma_unmap_addr(cb, dma_addr), 1398 RX_BUF_LENGTH, DMA_FROM_DEVICE); 1399 bcm_sysport_free_cb(cb); 1400 } 1401 1402 kfree(priv->rx_cbs); 1403 priv->rx_cbs = NULL; 1404 1405 netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n"); 1406 } 1407 1408 static void bcm_sysport_set_rx_mode(struct net_device *dev) 1409 { 1410 struct bcm_sysport_priv *priv = netdev_priv(dev); 1411 u32 reg; 1412 1413 reg = umac_readl(priv, UMAC_CMD); 1414 if (dev->flags & IFF_PROMISC) 1415 reg |= CMD_PROMISC; 1416 else 1417 reg &= ~CMD_PROMISC; 1418 umac_writel(priv, reg, UMAC_CMD); 1419 1420 /* No support for ALLMULTI */ 1421 if (dev->flags & IFF_ALLMULTI) 1422 return; 1423 } 1424 1425 static inline void umac_enable_set(struct bcm_sysport_priv *priv, 1426 u32 mask, unsigned int enable) 1427 { 1428 u32 reg; 1429 1430 reg = umac_readl(priv, UMAC_CMD); 1431 if (enable) 1432 reg |= mask; 1433 else 1434 reg &= ~mask; 1435 umac_writel(priv, reg, UMAC_CMD); 1436 1437 /* UniMAC stops on a packet boundary, wait for a full-sized packet 1438 * to be processed (1 msec). 1439 */ 1440 if (enable == 0) 1441 usleep_range(1000, 2000); 1442 } 1443 1444 static inline void umac_reset(struct bcm_sysport_priv *priv) 1445 { 1446 u32 reg; 1447 1448 reg = umac_readl(priv, UMAC_CMD); 1449 reg |= CMD_SW_RESET; 1450 umac_writel(priv, reg, UMAC_CMD); 1451 udelay(10); 1452 reg = umac_readl(priv, UMAC_CMD); 1453 reg &= ~CMD_SW_RESET; 1454 umac_writel(priv, reg, UMAC_CMD); 1455 } 1456 1457 static void umac_set_hw_addr(struct bcm_sysport_priv *priv, 1458 unsigned char *addr) 1459 { 1460 umac_writel(priv, (addr[0] << 24) | (addr[1] << 16) | 1461 (addr[2] << 8) | addr[3], UMAC_MAC0); 1462 umac_writel(priv, (addr[4] << 8) | addr[5], UMAC_MAC1); 1463 } 1464 1465 static void topctrl_flush(struct bcm_sysport_priv *priv) 1466 { 1467 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL); 1468 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL); 1469 mdelay(1); 1470 topctrl_writel(priv, 0, RX_FLUSH_CNTL); 1471 topctrl_writel(priv, 0, TX_FLUSH_CNTL); 1472 } 1473 1474 static int bcm_sysport_change_mac(struct net_device *dev, void *p) 1475 { 1476 struct bcm_sysport_priv *priv = netdev_priv(dev); 1477 struct sockaddr *addr = p; 1478 1479 if (!is_valid_ether_addr(addr->sa_data)) 1480 return -EINVAL; 1481 1482 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); 1483 1484 /* interface is disabled, changes to MAC will be reflected on next 1485 * open call 1486 */ 1487 if (!netif_running(dev)) 1488 return 0; 1489 1490 umac_set_hw_addr(priv, dev->dev_addr); 1491 1492 return 0; 1493 } 1494 1495 static void bcm_sysport_netif_start(struct net_device *dev) 1496 { 1497 struct bcm_sysport_priv *priv = netdev_priv(dev); 1498 1499 /* Enable NAPI */ 1500 napi_enable(&priv->napi); 1501 1502 /* Enable RX interrupt and TX ring full interrupt */ 1503 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL); 1504 1505 phy_start(dev->phydev); 1506 1507 /* Enable TX interrupts for the 32 TXQs */ 1508 intrl2_1_mask_clear(priv, 0xffffffff); 1509 1510 /* Last call before we start the real business */ 1511 netif_tx_start_all_queues(dev); 1512 } 1513 1514 static void rbuf_init(struct bcm_sysport_priv *priv) 1515 { 1516 u32 reg; 1517 1518 reg = rbuf_readl(priv, RBUF_CONTROL); 1519 reg |= RBUF_4B_ALGN | RBUF_RSB_EN; 1520 rbuf_writel(priv, reg, RBUF_CONTROL); 1521 } 1522 1523 static int bcm_sysport_open(struct net_device *dev) 1524 { 1525 struct bcm_sysport_priv *priv = netdev_priv(dev); 1526 struct phy_device *phydev; 1527 unsigned int i; 1528 int ret; 1529 1530 /* Reset UniMAC */ 1531 umac_reset(priv); 1532 1533 /* Flush TX and RX FIFOs at TOPCTRL level */ 1534 topctrl_flush(priv); 1535 1536 /* Disable the UniMAC RX/TX */ 1537 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0); 1538 1539 /* Enable RBUF 2bytes alignment and Receive Status Block */ 1540 rbuf_init(priv); 1541 1542 /* Set maximum frame length */ 1543 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN); 1544 1545 /* Set MAC address */ 1546 umac_set_hw_addr(priv, dev->dev_addr); 1547 1548 /* Read CRC forward */ 1549 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD); 1550 1551 phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link, 1552 0, priv->phy_interface); 1553 if (!phydev) { 1554 netdev_err(dev, "could not attach to PHY\n"); 1555 return -ENODEV; 1556 } 1557 1558 /* Reset house keeping link status */ 1559 priv->old_duplex = -1; 1560 priv->old_link = -1; 1561 priv->old_pause = -1; 1562 1563 /* mask all interrupts and request them */ 1564 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_MASK_SET); 1565 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); 1566 intrl2_0_writel(priv, 0, INTRL2_CPU_MASK_CLEAR); 1567 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_MASK_SET); 1568 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); 1569 intrl2_1_writel(priv, 0, INTRL2_CPU_MASK_CLEAR); 1570 1571 ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev); 1572 if (ret) { 1573 netdev_err(dev, "failed to request RX interrupt\n"); 1574 goto out_phy_disconnect; 1575 } 1576 1577 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0, dev->name, dev); 1578 if (ret) { 1579 netdev_err(dev, "failed to request TX interrupt\n"); 1580 goto out_free_irq0; 1581 } 1582 1583 /* Initialize both hardware and software ring */ 1584 for (i = 0; i < dev->num_tx_queues; i++) { 1585 ret = bcm_sysport_init_tx_ring(priv, i); 1586 if (ret) { 1587 netdev_err(dev, "failed to initialize TX ring %d\n", 1588 i); 1589 goto out_free_tx_ring; 1590 } 1591 } 1592 1593 /* Initialize linked-list */ 1594 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS); 1595 1596 /* Initialize RX ring */ 1597 ret = bcm_sysport_init_rx_ring(priv); 1598 if (ret) { 1599 netdev_err(dev, "failed to initialize RX ring\n"); 1600 goto out_free_rx_ring; 1601 } 1602 1603 /* Turn on RDMA */ 1604 ret = rdma_enable_set(priv, 1); 1605 if (ret) 1606 goto out_free_rx_ring; 1607 1608 /* Turn on TDMA */ 1609 ret = tdma_enable_set(priv, 1); 1610 if (ret) 1611 goto out_clear_rx_int; 1612 1613 /* Turn on UniMAC TX/RX */ 1614 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1); 1615 1616 bcm_sysport_netif_start(dev); 1617 1618 return 0; 1619 1620 out_clear_rx_int: 1621 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL); 1622 out_free_rx_ring: 1623 bcm_sysport_fini_rx_ring(priv); 1624 out_free_tx_ring: 1625 for (i = 0; i < dev->num_tx_queues; i++) 1626 bcm_sysport_fini_tx_ring(priv, i); 1627 free_irq(priv->irq1, dev); 1628 out_free_irq0: 1629 free_irq(priv->irq0, dev); 1630 out_phy_disconnect: 1631 phy_disconnect(phydev); 1632 return ret; 1633 } 1634 1635 static void bcm_sysport_netif_stop(struct net_device *dev) 1636 { 1637 struct bcm_sysport_priv *priv = netdev_priv(dev); 1638 1639 /* stop all software from updating hardware */ 1640 netif_tx_stop_all_queues(dev); 1641 napi_disable(&priv->napi); 1642 phy_stop(dev->phydev); 1643 1644 /* mask all interrupts */ 1645 intrl2_0_mask_set(priv, 0xffffffff); 1646 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); 1647 intrl2_1_mask_set(priv, 0xffffffff); 1648 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); 1649 } 1650 1651 static int bcm_sysport_stop(struct net_device *dev) 1652 { 1653 struct bcm_sysport_priv *priv = netdev_priv(dev); 1654 unsigned int i; 1655 int ret; 1656 1657 bcm_sysport_netif_stop(dev); 1658 1659 /* Disable UniMAC RX */ 1660 umac_enable_set(priv, CMD_RX_EN, 0); 1661 1662 ret = tdma_enable_set(priv, 0); 1663 if (ret) { 1664 netdev_err(dev, "timeout disabling RDMA\n"); 1665 return ret; 1666 } 1667 1668 /* Wait for a maximum packet size to be drained */ 1669 usleep_range(2000, 3000); 1670 1671 ret = rdma_enable_set(priv, 0); 1672 if (ret) { 1673 netdev_err(dev, "timeout disabling TDMA\n"); 1674 return ret; 1675 } 1676 1677 /* Disable UniMAC TX */ 1678 umac_enable_set(priv, CMD_TX_EN, 0); 1679 1680 /* Free RX/TX rings SW structures */ 1681 for (i = 0; i < dev->num_tx_queues; i++) 1682 bcm_sysport_fini_tx_ring(priv, i); 1683 bcm_sysport_fini_rx_ring(priv); 1684 1685 free_irq(priv->irq0, dev); 1686 free_irq(priv->irq1, dev); 1687 1688 /* Disconnect from PHY */ 1689 phy_disconnect(dev->phydev); 1690 1691 return 0; 1692 } 1693 1694 static const struct ethtool_ops bcm_sysport_ethtool_ops = { 1695 .get_drvinfo = bcm_sysport_get_drvinfo, 1696 .get_msglevel = bcm_sysport_get_msglvl, 1697 .set_msglevel = bcm_sysport_set_msglvl, 1698 .get_link = ethtool_op_get_link, 1699 .get_strings = bcm_sysport_get_strings, 1700 .get_ethtool_stats = bcm_sysport_get_stats, 1701 .get_sset_count = bcm_sysport_get_sset_count, 1702 .get_wol = bcm_sysport_get_wol, 1703 .set_wol = bcm_sysport_set_wol, 1704 .get_coalesce = bcm_sysport_get_coalesce, 1705 .set_coalesce = bcm_sysport_set_coalesce, 1706 .get_link_ksettings = phy_ethtool_get_link_ksettings, 1707 .set_link_ksettings = phy_ethtool_set_link_ksettings, 1708 }; 1709 1710 static const struct net_device_ops bcm_sysport_netdev_ops = { 1711 .ndo_start_xmit = bcm_sysport_xmit, 1712 .ndo_tx_timeout = bcm_sysport_tx_timeout, 1713 .ndo_open = bcm_sysport_open, 1714 .ndo_stop = bcm_sysport_stop, 1715 .ndo_set_features = bcm_sysport_set_features, 1716 .ndo_set_rx_mode = bcm_sysport_set_rx_mode, 1717 .ndo_set_mac_address = bcm_sysport_change_mac, 1718 #ifdef CONFIG_NET_POLL_CONTROLLER 1719 .ndo_poll_controller = bcm_sysport_poll_controller, 1720 #endif 1721 }; 1722 1723 #define REV_FMT "v%2x.%02x" 1724 1725 static int bcm_sysport_probe(struct platform_device *pdev) 1726 { 1727 struct bcm_sysport_priv *priv; 1728 struct device_node *dn; 1729 struct net_device *dev; 1730 const void *macaddr; 1731 struct resource *r; 1732 u32 txq, rxq; 1733 int ret; 1734 1735 dn = pdev->dev.of_node; 1736 r = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1737 1738 /* Read the Transmit/Receive Queue properties */ 1739 if (of_property_read_u32(dn, "systemport,num-txq", &txq)) 1740 txq = TDMA_NUM_RINGS; 1741 if (of_property_read_u32(dn, "systemport,num-rxq", &rxq)) 1742 rxq = 1; 1743 1744 dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq); 1745 if (!dev) 1746 return -ENOMEM; 1747 1748 /* Initialize private members */ 1749 priv = netdev_priv(dev); 1750 1751 priv->irq0 = platform_get_irq(pdev, 0); 1752 priv->irq1 = platform_get_irq(pdev, 1); 1753 priv->wol_irq = platform_get_irq(pdev, 2); 1754 if (priv->irq0 <= 0 || priv->irq1 <= 0) { 1755 dev_err(&pdev->dev, "invalid interrupts\n"); 1756 ret = -EINVAL; 1757 goto err_free_netdev; 1758 } 1759 1760 priv->base = devm_ioremap_resource(&pdev->dev, r); 1761 if (IS_ERR(priv->base)) { 1762 ret = PTR_ERR(priv->base); 1763 goto err_free_netdev; 1764 } 1765 1766 priv->netdev = dev; 1767 priv->pdev = pdev; 1768 1769 priv->phy_interface = of_get_phy_mode(dn); 1770 /* Default to GMII interface mode */ 1771 if (priv->phy_interface < 0) 1772 priv->phy_interface = PHY_INTERFACE_MODE_GMII; 1773 1774 /* In the case of a fixed PHY, the DT node associated 1775 * to the PHY is the Ethernet MAC DT node. 1776 */ 1777 if (of_phy_is_fixed_link(dn)) { 1778 ret = of_phy_register_fixed_link(dn); 1779 if (ret) { 1780 dev_err(&pdev->dev, "failed to register fixed PHY\n"); 1781 goto err_free_netdev; 1782 } 1783 1784 priv->phy_dn = dn; 1785 } 1786 1787 /* Initialize netdevice members */ 1788 macaddr = of_get_mac_address(dn); 1789 if (!macaddr || !is_valid_ether_addr(macaddr)) { 1790 dev_warn(&pdev->dev, "using random Ethernet MAC\n"); 1791 eth_hw_addr_random(dev); 1792 } else { 1793 ether_addr_copy(dev->dev_addr, macaddr); 1794 } 1795 1796 SET_NETDEV_DEV(dev, &pdev->dev); 1797 dev_set_drvdata(&pdev->dev, dev); 1798 dev->ethtool_ops = &bcm_sysport_ethtool_ops; 1799 dev->netdev_ops = &bcm_sysport_netdev_ops; 1800 netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64); 1801 1802 /* HW supported features, none enabled by default */ 1803 dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA | 1804 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 1805 1806 /* Request the WOL interrupt and advertise suspend if available */ 1807 priv->wol_irq_disabled = 1; 1808 ret = devm_request_irq(&pdev->dev, priv->wol_irq, 1809 bcm_sysport_wol_isr, 0, dev->name, priv); 1810 if (!ret) 1811 device_set_wakeup_capable(&pdev->dev, 1); 1812 1813 /* Set the needed headroom once and for all */ 1814 BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8); 1815 dev->needed_headroom += sizeof(struct bcm_tsb); 1816 1817 /* libphy will adjust the link state accordingly */ 1818 netif_carrier_off(dev); 1819 1820 ret = register_netdev(dev); 1821 if (ret) { 1822 dev_err(&pdev->dev, "failed to register net_device\n"); 1823 goto err_deregister_fixed_link; 1824 } 1825 1826 priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK; 1827 dev_info(&pdev->dev, 1828 "Broadcom SYSTEMPORT" REV_FMT 1829 " at 0x%p (irqs: %d, %d, TXQs: %d, RXQs: %d)\n", 1830 (priv->rev >> 8) & 0xff, priv->rev & 0xff, 1831 priv->base, priv->irq0, priv->irq1, txq, rxq); 1832 1833 return 0; 1834 1835 err_deregister_fixed_link: 1836 if (of_phy_is_fixed_link(dn)) 1837 of_phy_deregister_fixed_link(dn); 1838 err_free_netdev: 1839 free_netdev(dev); 1840 return ret; 1841 } 1842 1843 static int bcm_sysport_remove(struct platform_device *pdev) 1844 { 1845 struct net_device *dev = dev_get_drvdata(&pdev->dev); 1846 struct device_node *dn = pdev->dev.of_node; 1847 1848 /* Not much to do, ndo_close has been called 1849 * and we use managed allocations 1850 */ 1851 unregister_netdev(dev); 1852 if (of_phy_is_fixed_link(dn)) 1853 of_phy_deregister_fixed_link(dn); 1854 free_netdev(dev); 1855 dev_set_drvdata(&pdev->dev, NULL); 1856 1857 return 0; 1858 } 1859 1860 #ifdef CONFIG_PM_SLEEP 1861 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv) 1862 { 1863 struct net_device *ndev = priv->netdev; 1864 unsigned int timeout = 1000; 1865 u32 reg; 1866 1867 /* Password has already been programmed */ 1868 reg = umac_readl(priv, UMAC_MPD_CTRL); 1869 reg |= MPD_EN; 1870 reg &= ~PSW_EN; 1871 if (priv->wolopts & WAKE_MAGICSECURE) 1872 reg |= PSW_EN; 1873 umac_writel(priv, reg, UMAC_MPD_CTRL); 1874 1875 /* Make sure RBUF entered WoL mode as result */ 1876 do { 1877 reg = rbuf_readl(priv, RBUF_STATUS); 1878 if (reg & RBUF_WOL_MODE) 1879 break; 1880 1881 udelay(10); 1882 } while (timeout-- > 0); 1883 1884 /* Do not leave the UniMAC RBUF matching only MPD packets */ 1885 if (!timeout) { 1886 reg = umac_readl(priv, UMAC_MPD_CTRL); 1887 reg &= ~MPD_EN; 1888 umac_writel(priv, reg, UMAC_MPD_CTRL); 1889 netif_err(priv, wol, ndev, "failed to enter WOL mode\n"); 1890 return -ETIMEDOUT; 1891 } 1892 1893 /* UniMAC receive needs to be turned on */ 1894 umac_enable_set(priv, CMD_RX_EN, 1); 1895 1896 /* Enable the interrupt wake-up source */ 1897 intrl2_0_mask_clear(priv, INTRL2_0_MPD); 1898 1899 netif_dbg(priv, wol, ndev, "entered WOL mode\n"); 1900 1901 return 0; 1902 } 1903 1904 static int bcm_sysport_suspend(struct device *d) 1905 { 1906 struct net_device *dev = dev_get_drvdata(d); 1907 struct bcm_sysport_priv *priv = netdev_priv(dev); 1908 unsigned int i; 1909 int ret = 0; 1910 u32 reg; 1911 1912 if (!netif_running(dev)) 1913 return 0; 1914 1915 bcm_sysport_netif_stop(dev); 1916 1917 phy_suspend(dev->phydev); 1918 1919 netif_device_detach(dev); 1920 1921 /* Disable UniMAC RX */ 1922 umac_enable_set(priv, CMD_RX_EN, 0); 1923 1924 ret = rdma_enable_set(priv, 0); 1925 if (ret) { 1926 netdev_err(dev, "RDMA timeout!\n"); 1927 return ret; 1928 } 1929 1930 /* Disable RXCHK if enabled */ 1931 if (priv->rx_chk_en) { 1932 reg = rxchk_readl(priv, RXCHK_CONTROL); 1933 reg &= ~RXCHK_EN; 1934 rxchk_writel(priv, reg, RXCHK_CONTROL); 1935 } 1936 1937 /* Flush RX pipe */ 1938 if (!priv->wolopts) 1939 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL); 1940 1941 ret = tdma_enable_set(priv, 0); 1942 if (ret) { 1943 netdev_err(dev, "TDMA timeout!\n"); 1944 return ret; 1945 } 1946 1947 /* Wait for a packet boundary */ 1948 usleep_range(2000, 3000); 1949 1950 umac_enable_set(priv, CMD_TX_EN, 0); 1951 1952 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL); 1953 1954 /* Free RX/TX rings SW structures */ 1955 for (i = 0; i < dev->num_tx_queues; i++) 1956 bcm_sysport_fini_tx_ring(priv, i); 1957 bcm_sysport_fini_rx_ring(priv); 1958 1959 /* Get prepared for Wake-on-LAN */ 1960 if (device_may_wakeup(d) && priv->wolopts) 1961 ret = bcm_sysport_suspend_to_wol(priv); 1962 1963 return ret; 1964 } 1965 1966 static int bcm_sysport_resume(struct device *d) 1967 { 1968 struct net_device *dev = dev_get_drvdata(d); 1969 struct bcm_sysport_priv *priv = netdev_priv(dev); 1970 unsigned int i; 1971 u32 reg; 1972 int ret; 1973 1974 if (!netif_running(dev)) 1975 return 0; 1976 1977 umac_reset(priv); 1978 1979 /* We may have been suspended and never received a WOL event that 1980 * would turn off MPD detection, take care of that now 1981 */ 1982 bcm_sysport_resume_from_wol(priv); 1983 1984 /* Initialize both hardware and software ring */ 1985 for (i = 0; i < dev->num_tx_queues; i++) { 1986 ret = bcm_sysport_init_tx_ring(priv, i); 1987 if (ret) { 1988 netdev_err(dev, "failed to initialize TX ring %d\n", 1989 i); 1990 goto out_free_tx_rings; 1991 } 1992 } 1993 1994 /* Initialize linked-list */ 1995 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS); 1996 1997 /* Initialize RX ring */ 1998 ret = bcm_sysport_init_rx_ring(priv); 1999 if (ret) { 2000 netdev_err(dev, "failed to initialize RX ring\n"); 2001 goto out_free_rx_ring; 2002 } 2003 2004 netif_device_attach(dev); 2005 2006 /* RX pipe enable */ 2007 topctrl_writel(priv, 0, RX_FLUSH_CNTL); 2008 2009 ret = rdma_enable_set(priv, 1); 2010 if (ret) { 2011 netdev_err(dev, "failed to enable RDMA\n"); 2012 goto out_free_rx_ring; 2013 } 2014 2015 /* Enable rxhck */ 2016 if (priv->rx_chk_en) { 2017 reg = rxchk_readl(priv, RXCHK_CONTROL); 2018 reg |= RXCHK_EN; 2019 rxchk_writel(priv, reg, RXCHK_CONTROL); 2020 } 2021 2022 rbuf_init(priv); 2023 2024 /* Set maximum frame length */ 2025 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN); 2026 2027 /* Set MAC address */ 2028 umac_set_hw_addr(priv, dev->dev_addr); 2029 2030 umac_enable_set(priv, CMD_RX_EN, 1); 2031 2032 /* TX pipe enable */ 2033 topctrl_writel(priv, 0, TX_FLUSH_CNTL); 2034 2035 umac_enable_set(priv, CMD_TX_EN, 1); 2036 2037 ret = tdma_enable_set(priv, 1); 2038 if (ret) { 2039 netdev_err(dev, "TDMA timeout!\n"); 2040 goto out_free_rx_ring; 2041 } 2042 2043 phy_resume(dev->phydev); 2044 2045 bcm_sysport_netif_start(dev); 2046 2047 return 0; 2048 2049 out_free_rx_ring: 2050 bcm_sysport_fini_rx_ring(priv); 2051 out_free_tx_rings: 2052 for (i = 0; i < dev->num_tx_queues; i++) 2053 bcm_sysport_fini_tx_ring(priv, i); 2054 return ret; 2055 } 2056 #endif 2057 2058 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops, 2059 bcm_sysport_suspend, bcm_sysport_resume); 2060 2061 static const struct of_device_id bcm_sysport_of_match[] = { 2062 { .compatible = "brcm,systemport-v1.00" }, 2063 { .compatible = "brcm,systemport" }, 2064 { /* sentinel */ } 2065 }; 2066 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match); 2067 2068 static struct platform_driver bcm_sysport_driver = { 2069 .probe = bcm_sysport_probe, 2070 .remove = bcm_sysport_remove, 2071 .driver = { 2072 .name = "brcm-systemport", 2073 .of_match_table = bcm_sysport_of_match, 2074 .pm = &bcm_sysport_pm_ops, 2075 }, 2076 }; 2077 module_platform_driver(bcm_sysport_driver); 2078 2079 MODULE_AUTHOR("Broadcom Corporation"); 2080 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver"); 2081 MODULE_ALIAS("platform:brcm-systemport"); 2082 MODULE_LICENSE("GPL"); 2083