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/dsa.h> 26 #include <net/ip.h> 27 #include <net/ipv6.h> 28 29 #include "bcmsysport.h" 30 31 /* I/O accessors register helpers */ 32 #define BCM_SYSPORT_IO_MACRO(name, offset) \ 33 static inline u32 name##_readl(struct bcm_sysport_priv *priv, u32 off) \ 34 { \ 35 u32 reg = readl_relaxed(priv->base + offset + off); \ 36 return reg; \ 37 } \ 38 static inline void name##_writel(struct bcm_sysport_priv *priv, \ 39 u32 val, u32 off) \ 40 { \ 41 writel_relaxed(val, priv->base + offset + off); \ 42 } \ 43 44 BCM_SYSPORT_IO_MACRO(intrl2_0, SYS_PORT_INTRL2_0_OFFSET); 45 BCM_SYSPORT_IO_MACRO(intrl2_1, SYS_PORT_INTRL2_1_OFFSET); 46 BCM_SYSPORT_IO_MACRO(umac, SYS_PORT_UMAC_OFFSET); 47 BCM_SYSPORT_IO_MACRO(gib, SYS_PORT_GIB_OFFSET); 48 BCM_SYSPORT_IO_MACRO(tdma, SYS_PORT_TDMA_OFFSET); 49 BCM_SYSPORT_IO_MACRO(rxchk, SYS_PORT_RXCHK_OFFSET); 50 BCM_SYSPORT_IO_MACRO(txchk, SYS_PORT_TXCHK_OFFSET); 51 BCM_SYSPORT_IO_MACRO(rbuf, SYS_PORT_RBUF_OFFSET); 52 BCM_SYSPORT_IO_MACRO(tbuf, SYS_PORT_TBUF_OFFSET); 53 BCM_SYSPORT_IO_MACRO(topctrl, SYS_PORT_TOPCTRL_OFFSET); 54 55 /* On SYSTEMPORT Lite, any register after RDMA_STATUS has the exact 56 * same layout, except it has been moved by 4 bytes up, *sigh* 57 */ 58 static inline u32 rdma_readl(struct bcm_sysport_priv *priv, u32 off) 59 { 60 if (priv->is_lite && off >= RDMA_STATUS) 61 off += 4; 62 return readl_relaxed(priv->base + SYS_PORT_RDMA_OFFSET + off); 63 } 64 65 static inline void rdma_writel(struct bcm_sysport_priv *priv, u32 val, u32 off) 66 { 67 if (priv->is_lite && off >= RDMA_STATUS) 68 off += 4; 69 writel_relaxed(val, priv->base + SYS_PORT_RDMA_OFFSET + off); 70 } 71 72 static inline u32 tdma_control_bit(struct bcm_sysport_priv *priv, u32 bit) 73 { 74 if (!priv->is_lite) { 75 return BIT(bit); 76 } else { 77 if (bit >= ACB_ALGO) 78 return BIT(bit + 1); 79 else 80 return BIT(bit); 81 } 82 } 83 84 /* L2-interrupt masking/unmasking helpers, does automatic saving of the applied 85 * mask in a software copy to avoid CPU_MASK_STATUS reads in hot-paths. 86 */ 87 #define BCM_SYSPORT_INTR_L2(which) \ 88 static inline void intrl2_##which##_mask_clear(struct bcm_sysport_priv *priv, \ 89 u32 mask) \ 90 { \ 91 priv->irq##which##_mask &= ~(mask); \ 92 intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR); \ 93 } \ 94 static inline void intrl2_##which##_mask_set(struct bcm_sysport_priv *priv, \ 95 u32 mask) \ 96 { \ 97 intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET); \ 98 priv->irq##which##_mask |= (mask); \ 99 } \ 100 101 BCM_SYSPORT_INTR_L2(0) 102 BCM_SYSPORT_INTR_L2(1) 103 104 /* Register accesses to GISB/RBUS registers are expensive (few hundred 105 * nanoseconds), so keep the check for 64-bits explicit here to save 106 * one register write per-packet on 32-bits platforms. 107 */ 108 static inline void dma_desc_set_addr(struct bcm_sysport_priv *priv, 109 void __iomem *d, 110 dma_addr_t addr) 111 { 112 #ifdef CONFIG_PHYS_ADDR_T_64BIT 113 writel_relaxed(upper_32_bits(addr) & DESC_ADDR_HI_MASK, 114 d + DESC_ADDR_HI_STATUS_LEN); 115 #endif 116 writel_relaxed(lower_32_bits(addr), d + DESC_ADDR_LO); 117 } 118 119 static inline void tdma_port_write_desc_addr(struct bcm_sysport_priv *priv, 120 struct dma_desc *desc, 121 unsigned int port) 122 { 123 /* Ports are latched, so write upper address first */ 124 tdma_writel(priv, desc->addr_status_len, TDMA_WRITE_PORT_HI(port)); 125 tdma_writel(priv, desc->addr_lo, TDMA_WRITE_PORT_LO(port)); 126 } 127 128 /* Ethtool operations */ 129 static int bcm_sysport_set_rx_csum(struct net_device *dev, 130 netdev_features_t wanted) 131 { 132 struct bcm_sysport_priv *priv = netdev_priv(dev); 133 u32 reg; 134 135 priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM); 136 reg = rxchk_readl(priv, RXCHK_CONTROL); 137 if (priv->rx_chk_en) 138 reg |= RXCHK_EN; 139 else 140 reg &= ~RXCHK_EN; 141 142 /* If UniMAC forwards CRC, we need to skip over it to get 143 * a valid CHK bit to be set in the per-packet status word 144 */ 145 if (priv->rx_chk_en && priv->crc_fwd) 146 reg |= RXCHK_SKIP_FCS; 147 else 148 reg &= ~RXCHK_SKIP_FCS; 149 150 /* If Broadcom tags are enabled (e.g: using a switch), make 151 * sure we tell the RXCHK hardware to expect a 4-bytes Broadcom 152 * tag after the Ethernet MAC Source Address. 153 */ 154 if (netdev_uses_dsa(dev)) 155 reg |= RXCHK_BRCM_TAG_EN; 156 else 157 reg &= ~RXCHK_BRCM_TAG_EN; 158 159 rxchk_writel(priv, reg, RXCHK_CONTROL); 160 161 return 0; 162 } 163 164 static int bcm_sysport_set_tx_csum(struct net_device *dev, 165 netdev_features_t wanted) 166 { 167 struct bcm_sysport_priv *priv = netdev_priv(dev); 168 u32 reg; 169 170 /* Hardware transmit checksum requires us to enable the Transmit status 171 * block prepended to the packet contents 172 */ 173 priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)); 174 reg = tdma_readl(priv, TDMA_CONTROL); 175 if (priv->tsb_en) 176 reg |= tdma_control_bit(priv, TSB_EN); 177 else 178 reg &= ~tdma_control_bit(priv, TSB_EN); 179 tdma_writel(priv, reg, TDMA_CONTROL); 180 181 return 0; 182 } 183 184 static int bcm_sysport_set_features(struct net_device *dev, 185 netdev_features_t features) 186 { 187 netdev_features_t changed = features ^ dev->features; 188 netdev_features_t wanted = dev->wanted_features; 189 int ret = 0; 190 191 if (changed & NETIF_F_RXCSUM) 192 ret = bcm_sysport_set_rx_csum(dev, wanted); 193 if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) 194 ret = bcm_sysport_set_tx_csum(dev, wanted); 195 196 return ret; 197 } 198 199 /* Hardware counters must be kept in sync because the order/offset 200 * is important here (order in structure declaration = order in hardware) 201 */ 202 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = { 203 /* general stats */ 204 STAT_NETDEV64(rx_packets), 205 STAT_NETDEV64(tx_packets), 206 STAT_NETDEV64(rx_bytes), 207 STAT_NETDEV64(tx_bytes), 208 STAT_NETDEV(rx_errors), 209 STAT_NETDEV(tx_errors), 210 STAT_NETDEV(rx_dropped), 211 STAT_NETDEV(tx_dropped), 212 STAT_NETDEV(multicast), 213 /* UniMAC RSV counters */ 214 STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64), 215 STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127), 216 STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255), 217 STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511), 218 STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023), 219 STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518), 220 STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv), 221 STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047), 222 STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095), 223 STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216), 224 STAT_MIB_RX("rx_pkts", mib.rx.pkt), 225 STAT_MIB_RX("rx_bytes", mib.rx.bytes), 226 STAT_MIB_RX("rx_multicast", mib.rx.mca), 227 STAT_MIB_RX("rx_broadcast", mib.rx.bca), 228 STAT_MIB_RX("rx_fcs", mib.rx.fcs), 229 STAT_MIB_RX("rx_control", mib.rx.cf), 230 STAT_MIB_RX("rx_pause", mib.rx.pf), 231 STAT_MIB_RX("rx_unknown", mib.rx.uo), 232 STAT_MIB_RX("rx_align", mib.rx.aln), 233 STAT_MIB_RX("rx_outrange", mib.rx.flr), 234 STAT_MIB_RX("rx_code", mib.rx.cde), 235 STAT_MIB_RX("rx_carrier", mib.rx.fcr), 236 STAT_MIB_RX("rx_oversize", mib.rx.ovr), 237 STAT_MIB_RX("rx_jabber", mib.rx.jbr), 238 STAT_MIB_RX("rx_mtu_err", mib.rx.mtue), 239 STAT_MIB_RX("rx_good_pkts", mib.rx.pok), 240 STAT_MIB_RX("rx_unicast", mib.rx.uc), 241 STAT_MIB_RX("rx_ppp", mib.rx.ppp), 242 STAT_MIB_RX("rx_crc", mib.rx.rcrc), 243 /* UniMAC TSV counters */ 244 STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64), 245 STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127), 246 STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255), 247 STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511), 248 STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023), 249 STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518), 250 STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv), 251 STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047), 252 STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095), 253 STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216), 254 STAT_MIB_TX("tx_pkts", mib.tx.pkts), 255 STAT_MIB_TX("tx_multicast", mib.tx.mca), 256 STAT_MIB_TX("tx_broadcast", mib.tx.bca), 257 STAT_MIB_TX("tx_pause", mib.tx.pf), 258 STAT_MIB_TX("tx_control", mib.tx.cf), 259 STAT_MIB_TX("tx_fcs_err", mib.tx.fcs), 260 STAT_MIB_TX("tx_oversize", mib.tx.ovr), 261 STAT_MIB_TX("tx_defer", mib.tx.drf), 262 STAT_MIB_TX("tx_excess_defer", mib.tx.edf), 263 STAT_MIB_TX("tx_single_col", mib.tx.scl), 264 STAT_MIB_TX("tx_multi_col", mib.tx.mcl), 265 STAT_MIB_TX("tx_late_col", mib.tx.lcl), 266 STAT_MIB_TX("tx_excess_col", mib.tx.ecl), 267 STAT_MIB_TX("tx_frags", mib.tx.frg), 268 STAT_MIB_TX("tx_total_col", mib.tx.ncl), 269 STAT_MIB_TX("tx_jabber", mib.tx.jbr), 270 STAT_MIB_TX("tx_bytes", mib.tx.bytes), 271 STAT_MIB_TX("tx_good_pkts", mib.tx.pok), 272 STAT_MIB_TX("tx_unicast", mib.tx.uc), 273 /* UniMAC RUNT counters */ 274 STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt), 275 STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs), 276 STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align), 277 STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes), 278 /* RXCHK misc statistics */ 279 STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR), 280 STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc, 281 RXCHK_OTHER_DISC_CNTR), 282 /* RBUF misc statistics */ 283 STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR), 284 STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR), 285 STAT_MIB_SOFT("alloc_rx_buff_failed", mib.alloc_rx_buff_failed), 286 STAT_MIB_SOFT("rx_dma_failed", mib.rx_dma_failed), 287 STAT_MIB_SOFT("tx_dma_failed", mib.tx_dma_failed), 288 /* Per TX-queue statistics are dynamically appended */ 289 }; 290 291 #define BCM_SYSPORT_STATS_LEN ARRAY_SIZE(bcm_sysport_gstrings_stats) 292 293 static void bcm_sysport_get_drvinfo(struct net_device *dev, 294 struct ethtool_drvinfo *info) 295 { 296 strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); 297 strlcpy(info->version, "0.1", sizeof(info->version)); 298 strlcpy(info->bus_info, "platform", sizeof(info->bus_info)); 299 } 300 301 static u32 bcm_sysport_get_msglvl(struct net_device *dev) 302 { 303 struct bcm_sysport_priv *priv = netdev_priv(dev); 304 305 return priv->msg_enable; 306 } 307 308 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable) 309 { 310 struct bcm_sysport_priv *priv = netdev_priv(dev); 311 312 priv->msg_enable = enable; 313 } 314 315 static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type) 316 { 317 switch (type) { 318 case BCM_SYSPORT_STAT_NETDEV: 319 case BCM_SYSPORT_STAT_NETDEV64: 320 case BCM_SYSPORT_STAT_RXCHK: 321 case BCM_SYSPORT_STAT_RBUF: 322 case BCM_SYSPORT_STAT_SOFT: 323 return true; 324 default: 325 return false; 326 } 327 } 328 329 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set) 330 { 331 struct bcm_sysport_priv *priv = netdev_priv(dev); 332 const struct bcm_sysport_stats *s; 333 unsigned int i, j; 334 335 switch (string_set) { 336 case ETH_SS_STATS: 337 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) { 338 s = &bcm_sysport_gstrings_stats[i]; 339 if (priv->is_lite && 340 !bcm_sysport_lite_stat_valid(s->type)) 341 continue; 342 j++; 343 } 344 /* Include per-queue statistics */ 345 return j + dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT; 346 default: 347 return -EOPNOTSUPP; 348 } 349 } 350 351 static void bcm_sysport_get_strings(struct net_device *dev, 352 u32 stringset, u8 *data) 353 { 354 struct bcm_sysport_priv *priv = netdev_priv(dev); 355 const struct bcm_sysport_stats *s; 356 char buf[128]; 357 int i, j; 358 359 switch (stringset) { 360 case ETH_SS_STATS: 361 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) { 362 s = &bcm_sysport_gstrings_stats[i]; 363 if (priv->is_lite && 364 !bcm_sysport_lite_stat_valid(s->type)) 365 continue; 366 367 memcpy(data + j * ETH_GSTRING_LEN, s->stat_string, 368 ETH_GSTRING_LEN); 369 j++; 370 } 371 372 for (i = 0; i < dev->num_tx_queues; i++) { 373 snprintf(buf, sizeof(buf), "txq%d_packets", i); 374 memcpy(data + j * ETH_GSTRING_LEN, buf, 375 ETH_GSTRING_LEN); 376 j++; 377 378 snprintf(buf, sizeof(buf), "txq%d_bytes", i); 379 memcpy(data + j * ETH_GSTRING_LEN, buf, 380 ETH_GSTRING_LEN); 381 j++; 382 } 383 break; 384 default: 385 break; 386 } 387 } 388 389 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv) 390 { 391 int i, j = 0; 392 393 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) { 394 const struct bcm_sysport_stats *s; 395 u8 offset = 0; 396 u32 val = 0; 397 char *p; 398 399 s = &bcm_sysport_gstrings_stats[i]; 400 switch (s->type) { 401 case BCM_SYSPORT_STAT_NETDEV: 402 case BCM_SYSPORT_STAT_NETDEV64: 403 case BCM_SYSPORT_STAT_SOFT: 404 continue; 405 case BCM_SYSPORT_STAT_MIB_RX: 406 case BCM_SYSPORT_STAT_MIB_TX: 407 case BCM_SYSPORT_STAT_RUNT: 408 if (priv->is_lite) 409 continue; 410 411 if (s->type != BCM_SYSPORT_STAT_MIB_RX) 412 offset = UMAC_MIB_STAT_OFFSET; 413 val = umac_readl(priv, UMAC_MIB_START + j + offset); 414 break; 415 case BCM_SYSPORT_STAT_RXCHK: 416 val = rxchk_readl(priv, s->reg_offset); 417 if (val == ~0) 418 rxchk_writel(priv, 0, s->reg_offset); 419 break; 420 case BCM_SYSPORT_STAT_RBUF: 421 val = rbuf_readl(priv, s->reg_offset); 422 if (val == ~0) 423 rbuf_writel(priv, 0, s->reg_offset); 424 break; 425 } 426 427 j += s->stat_sizeof; 428 p = (char *)priv + s->stat_offset; 429 *(u32 *)p = val; 430 } 431 432 netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n"); 433 } 434 435 static void bcm_sysport_update_tx_stats(struct bcm_sysport_priv *priv, 436 u64 *tx_bytes, u64 *tx_packets) 437 { 438 struct bcm_sysport_tx_ring *ring; 439 u64 bytes = 0, packets = 0; 440 unsigned int start; 441 unsigned int q; 442 443 for (q = 0; q < priv->netdev->num_tx_queues; q++) { 444 ring = &priv->tx_rings[q]; 445 do { 446 start = u64_stats_fetch_begin_irq(&priv->syncp); 447 bytes = ring->bytes; 448 packets = ring->packets; 449 } while (u64_stats_fetch_retry_irq(&priv->syncp, start)); 450 451 *tx_bytes += bytes; 452 *tx_packets += packets; 453 } 454 } 455 456 static void bcm_sysport_get_stats(struct net_device *dev, 457 struct ethtool_stats *stats, u64 *data) 458 { 459 struct bcm_sysport_priv *priv = netdev_priv(dev); 460 struct bcm_sysport_stats64 *stats64 = &priv->stats64; 461 struct u64_stats_sync *syncp = &priv->syncp; 462 struct bcm_sysport_tx_ring *ring; 463 u64 tx_bytes = 0, tx_packets = 0; 464 unsigned int start; 465 int i, j; 466 467 if (netif_running(dev)) { 468 bcm_sysport_update_mib_counters(priv); 469 bcm_sysport_update_tx_stats(priv, &tx_bytes, &tx_packets); 470 stats64->tx_bytes = tx_bytes; 471 stats64->tx_packets = tx_packets; 472 } 473 474 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) { 475 const struct bcm_sysport_stats *s; 476 char *p; 477 478 s = &bcm_sysport_gstrings_stats[i]; 479 if (s->type == BCM_SYSPORT_STAT_NETDEV) 480 p = (char *)&dev->stats; 481 else if (s->type == BCM_SYSPORT_STAT_NETDEV64) 482 p = (char *)stats64; 483 else 484 p = (char *)priv; 485 486 if (priv->is_lite && !bcm_sysport_lite_stat_valid(s->type)) 487 continue; 488 p += s->stat_offset; 489 490 if (s->stat_sizeof == sizeof(u64) && 491 s->type == BCM_SYSPORT_STAT_NETDEV64) { 492 do { 493 start = u64_stats_fetch_begin_irq(syncp); 494 data[i] = *(u64 *)p; 495 } while (u64_stats_fetch_retry_irq(syncp, start)); 496 } else 497 data[i] = *(u32 *)p; 498 j++; 499 } 500 501 /* For SYSTEMPORT Lite since we have holes in our statistics, j would 502 * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it 503 * needs to point to how many total statistics we have minus the 504 * number of per TX queue statistics 505 */ 506 j = bcm_sysport_get_sset_count(dev, ETH_SS_STATS) - 507 dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT; 508 509 for (i = 0; i < dev->num_tx_queues; i++) { 510 ring = &priv->tx_rings[i]; 511 data[j] = ring->packets; 512 j++; 513 data[j] = ring->bytes; 514 j++; 515 } 516 } 517 518 static void bcm_sysport_get_wol(struct net_device *dev, 519 struct ethtool_wolinfo *wol) 520 { 521 struct bcm_sysport_priv *priv = netdev_priv(dev); 522 u32 reg; 523 524 wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE; 525 wol->wolopts = priv->wolopts; 526 527 if (!(priv->wolopts & WAKE_MAGICSECURE)) 528 return; 529 530 /* Return the programmed SecureOn password */ 531 reg = umac_readl(priv, UMAC_PSW_MS); 532 put_unaligned_be16(reg, &wol->sopass[0]); 533 reg = umac_readl(priv, UMAC_PSW_LS); 534 put_unaligned_be32(reg, &wol->sopass[2]); 535 } 536 537 static int bcm_sysport_set_wol(struct net_device *dev, 538 struct ethtool_wolinfo *wol) 539 { 540 struct bcm_sysport_priv *priv = netdev_priv(dev); 541 struct device *kdev = &priv->pdev->dev; 542 u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE; 543 544 if (!device_can_wakeup(kdev)) 545 return -ENOTSUPP; 546 547 if (wol->wolopts & ~supported) 548 return -EINVAL; 549 550 /* Program the SecureOn password */ 551 if (wol->wolopts & WAKE_MAGICSECURE) { 552 umac_writel(priv, get_unaligned_be16(&wol->sopass[0]), 553 UMAC_PSW_MS); 554 umac_writel(priv, get_unaligned_be32(&wol->sopass[2]), 555 UMAC_PSW_LS); 556 } 557 558 /* Flag the device and relevant IRQ as wakeup capable */ 559 if (wol->wolopts) { 560 device_set_wakeup_enable(kdev, 1); 561 if (priv->wol_irq_disabled) 562 enable_irq_wake(priv->wol_irq); 563 priv->wol_irq_disabled = 0; 564 } else { 565 device_set_wakeup_enable(kdev, 0); 566 /* Avoid unbalanced disable_irq_wake calls */ 567 if (!priv->wol_irq_disabled) 568 disable_irq_wake(priv->wol_irq); 569 priv->wol_irq_disabled = 1; 570 } 571 572 priv->wolopts = wol->wolopts; 573 574 return 0; 575 } 576 577 static int bcm_sysport_get_coalesce(struct net_device *dev, 578 struct ethtool_coalesce *ec) 579 { 580 struct bcm_sysport_priv *priv = netdev_priv(dev); 581 u32 reg; 582 583 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0)); 584 585 ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000; 586 ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK; 587 588 reg = rdma_readl(priv, RDMA_MBDONE_INTR); 589 590 ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000; 591 ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK; 592 593 return 0; 594 } 595 596 static int bcm_sysport_set_coalesce(struct net_device *dev, 597 struct ethtool_coalesce *ec) 598 { 599 struct bcm_sysport_priv *priv = netdev_priv(dev); 600 unsigned int i; 601 u32 reg; 602 603 /* Base system clock is 125Mhz, DMA timeout is this reference clock 604 * divided by 1024, which yield roughly 8.192 us, our maximum value has 605 * to fit in the RING_TIMEOUT_MASK (16 bits). 606 */ 607 if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK || 608 ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 || 609 ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK || 610 ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1) 611 return -EINVAL; 612 613 if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) || 614 (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0)) 615 return -EINVAL; 616 617 for (i = 0; i < dev->num_tx_queues; i++) { 618 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(i)); 619 reg &= ~(RING_INTR_THRESH_MASK | 620 RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT); 621 reg |= ec->tx_max_coalesced_frames; 622 reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) << 623 RING_TIMEOUT_SHIFT; 624 tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(i)); 625 } 626 627 reg = rdma_readl(priv, RDMA_MBDONE_INTR); 628 reg &= ~(RDMA_INTR_THRESH_MASK | 629 RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT); 630 reg |= ec->rx_max_coalesced_frames; 631 reg |= DIV_ROUND_UP(ec->rx_coalesce_usecs * 1000, 8192) << 632 RDMA_TIMEOUT_SHIFT; 633 rdma_writel(priv, reg, RDMA_MBDONE_INTR); 634 635 return 0; 636 } 637 638 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb) 639 { 640 dev_consume_skb_any(cb->skb); 641 cb->skb = NULL; 642 dma_unmap_addr_set(cb, dma_addr, 0); 643 } 644 645 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv, 646 struct bcm_sysport_cb *cb) 647 { 648 struct device *kdev = &priv->pdev->dev; 649 struct net_device *ndev = priv->netdev; 650 struct sk_buff *skb, *rx_skb; 651 dma_addr_t mapping; 652 653 /* Allocate a new SKB for a new packet */ 654 skb = netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH); 655 if (!skb) { 656 priv->mib.alloc_rx_buff_failed++; 657 netif_err(priv, rx_err, ndev, "SKB alloc failed\n"); 658 return NULL; 659 } 660 661 mapping = dma_map_single(kdev, skb->data, 662 RX_BUF_LENGTH, DMA_FROM_DEVICE); 663 if (dma_mapping_error(kdev, mapping)) { 664 priv->mib.rx_dma_failed++; 665 dev_kfree_skb_any(skb); 666 netif_err(priv, rx_err, ndev, "DMA mapping failure\n"); 667 return NULL; 668 } 669 670 /* Grab the current SKB on the ring */ 671 rx_skb = cb->skb; 672 if (likely(rx_skb)) 673 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr), 674 RX_BUF_LENGTH, DMA_FROM_DEVICE); 675 676 /* Put the new SKB on the ring */ 677 cb->skb = skb; 678 dma_unmap_addr_set(cb, dma_addr, mapping); 679 dma_desc_set_addr(priv, cb->bd_addr, mapping); 680 681 netif_dbg(priv, rx_status, ndev, "RX refill\n"); 682 683 /* Return the current SKB to the caller */ 684 return rx_skb; 685 } 686 687 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv) 688 { 689 struct bcm_sysport_cb *cb; 690 struct sk_buff *skb; 691 unsigned int i; 692 693 for (i = 0; i < priv->num_rx_bds; i++) { 694 cb = &priv->rx_cbs[i]; 695 skb = bcm_sysport_rx_refill(priv, cb); 696 if (skb) 697 dev_kfree_skb(skb); 698 if (!cb->skb) 699 return -ENOMEM; 700 } 701 702 return 0; 703 } 704 705 /* Poll the hardware for up to budget packets to process */ 706 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv, 707 unsigned int budget) 708 { 709 struct bcm_sysport_stats64 *stats64 = &priv->stats64; 710 struct net_device *ndev = priv->netdev; 711 unsigned int processed = 0, to_process; 712 struct bcm_sysport_cb *cb; 713 struct sk_buff *skb; 714 unsigned int p_index; 715 u16 len, status; 716 struct bcm_rsb *rsb; 717 718 /* Clear status before servicing to reduce spurious interrupts */ 719 intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR); 720 721 /* Determine how much we should process since last call, SYSTEMPORT Lite 722 * groups the producer and consumer indexes into the same 32-bit 723 * which we access using RDMA_CONS_INDEX 724 */ 725 if (!priv->is_lite) 726 p_index = rdma_readl(priv, RDMA_PROD_INDEX); 727 else 728 p_index = rdma_readl(priv, RDMA_CONS_INDEX); 729 p_index &= RDMA_PROD_INDEX_MASK; 730 731 to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK; 732 733 netif_dbg(priv, rx_status, ndev, 734 "p_index=%d rx_c_index=%d to_process=%d\n", 735 p_index, priv->rx_c_index, to_process); 736 737 while ((processed < to_process) && (processed < budget)) { 738 cb = &priv->rx_cbs[priv->rx_read_ptr]; 739 skb = bcm_sysport_rx_refill(priv, cb); 740 741 742 /* We do not have a backing SKB, so we do not a corresponding 743 * DMA mapping for this incoming packet since 744 * bcm_sysport_rx_refill always either has both skb and mapping 745 * or none. 746 */ 747 if (unlikely(!skb)) { 748 netif_err(priv, rx_err, ndev, "out of memory!\n"); 749 ndev->stats.rx_dropped++; 750 ndev->stats.rx_errors++; 751 goto next; 752 } 753 754 /* Extract the Receive Status Block prepended */ 755 rsb = (struct bcm_rsb *)skb->data; 756 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK; 757 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) & 758 DESC_STATUS_MASK; 759 760 netif_dbg(priv, rx_status, ndev, 761 "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n", 762 p_index, priv->rx_c_index, priv->rx_read_ptr, 763 len, status); 764 765 if (unlikely(len > RX_BUF_LENGTH)) { 766 netif_err(priv, rx_status, ndev, "oversized packet\n"); 767 ndev->stats.rx_length_errors++; 768 ndev->stats.rx_errors++; 769 dev_kfree_skb_any(skb); 770 goto next; 771 } 772 773 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) { 774 netif_err(priv, rx_status, ndev, "fragmented packet!\n"); 775 ndev->stats.rx_dropped++; 776 ndev->stats.rx_errors++; 777 dev_kfree_skb_any(skb); 778 goto next; 779 } 780 781 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) { 782 netif_err(priv, rx_err, ndev, "error packet\n"); 783 if (status & RX_STATUS_OVFLOW) 784 ndev->stats.rx_over_errors++; 785 ndev->stats.rx_dropped++; 786 ndev->stats.rx_errors++; 787 dev_kfree_skb_any(skb); 788 goto next; 789 } 790 791 skb_put(skb, len); 792 793 /* Hardware validated our checksum */ 794 if (likely(status & DESC_L4_CSUM)) 795 skb->ip_summed = CHECKSUM_UNNECESSARY; 796 797 /* Hardware pre-pends packets with 2bytes before Ethernet 798 * header plus we have the Receive Status Block, strip off all 799 * of this from the SKB. 800 */ 801 skb_pull(skb, sizeof(*rsb) + 2); 802 len -= (sizeof(*rsb) + 2); 803 804 /* UniMAC may forward CRC */ 805 if (priv->crc_fwd) { 806 skb_trim(skb, len - ETH_FCS_LEN); 807 len -= ETH_FCS_LEN; 808 } 809 810 skb->protocol = eth_type_trans(skb, ndev); 811 ndev->stats.rx_packets++; 812 ndev->stats.rx_bytes += len; 813 u64_stats_update_begin(&priv->syncp); 814 stats64->rx_packets++; 815 stats64->rx_bytes += len; 816 u64_stats_update_end(&priv->syncp); 817 818 napi_gro_receive(&priv->napi, skb); 819 next: 820 processed++; 821 priv->rx_read_ptr++; 822 823 if (priv->rx_read_ptr == priv->num_rx_bds) 824 priv->rx_read_ptr = 0; 825 } 826 827 return processed; 828 } 829 830 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring, 831 struct bcm_sysport_cb *cb, 832 unsigned int *bytes_compl, 833 unsigned int *pkts_compl) 834 { 835 struct bcm_sysport_priv *priv = ring->priv; 836 struct device *kdev = &priv->pdev->dev; 837 838 if (cb->skb) { 839 *bytes_compl += cb->skb->len; 840 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr), 841 dma_unmap_len(cb, dma_len), 842 DMA_TO_DEVICE); 843 (*pkts_compl)++; 844 bcm_sysport_free_cb(cb); 845 /* SKB fragment */ 846 } else if (dma_unmap_addr(cb, dma_addr)) { 847 *bytes_compl += dma_unmap_len(cb, dma_len); 848 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr), 849 dma_unmap_len(cb, dma_len), DMA_TO_DEVICE); 850 dma_unmap_addr_set(cb, dma_addr, 0); 851 } 852 } 853 854 /* Reclaim queued SKBs for transmission completion, lockless version */ 855 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv, 856 struct bcm_sysport_tx_ring *ring) 857 { 858 unsigned int c_index, last_c_index, last_tx_cn, num_tx_cbs; 859 unsigned int pkts_compl = 0, bytes_compl = 0; 860 struct net_device *ndev = priv->netdev; 861 struct bcm_sysport_cb *cb; 862 u32 hw_ind; 863 864 /* Clear status before servicing to reduce spurious interrupts */ 865 if (!ring->priv->is_lite) 866 intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR); 867 else 868 intrl2_0_writel(ring->priv, BIT(ring->index + 869 INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR); 870 871 /* Compute how many descriptors have been processed since last call */ 872 hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index)); 873 c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK; 874 ring->p_index = (hw_ind & RING_PROD_INDEX_MASK); 875 876 last_c_index = ring->c_index; 877 num_tx_cbs = ring->size; 878 879 c_index &= (num_tx_cbs - 1); 880 881 if (c_index >= last_c_index) 882 last_tx_cn = c_index - last_c_index; 883 else 884 last_tx_cn = num_tx_cbs - last_c_index + c_index; 885 886 netif_dbg(priv, tx_done, ndev, 887 "ring=%d c_index=%d last_tx_cn=%d last_c_index=%d\n", 888 ring->index, c_index, last_tx_cn, last_c_index); 889 890 while (last_tx_cn-- > 0) { 891 cb = ring->cbs + last_c_index; 892 bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl); 893 894 ring->desc_count++; 895 last_c_index++; 896 last_c_index &= (num_tx_cbs - 1); 897 } 898 899 u64_stats_update_begin(&priv->syncp); 900 ring->packets += pkts_compl; 901 ring->bytes += bytes_compl; 902 u64_stats_update_end(&priv->syncp); 903 904 ring->c_index = c_index; 905 906 netif_dbg(priv, tx_done, ndev, 907 "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n", 908 ring->index, ring->c_index, pkts_compl, bytes_compl); 909 910 return pkts_compl; 911 } 912 913 /* Locked version of the per-ring TX reclaim routine */ 914 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv, 915 struct bcm_sysport_tx_ring *ring) 916 { 917 struct netdev_queue *txq; 918 unsigned int released; 919 unsigned long flags; 920 921 txq = netdev_get_tx_queue(priv->netdev, ring->index); 922 923 spin_lock_irqsave(&ring->lock, flags); 924 released = __bcm_sysport_tx_reclaim(priv, ring); 925 if (released) 926 netif_tx_wake_queue(txq); 927 928 spin_unlock_irqrestore(&ring->lock, flags); 929 930 return released; 931 } 932 933 /* Locked version of the per-ring TX reclaim, but does not wake the queue */ 934 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv, 935 struct bcm_sysport_tx_ring *ring) 936 { 937 unsigned long flags; 938 939 spin_lock_irqsave(&ring->lock, flags); 940 __bcm_sysport_tx_reclaim(priv, ring); 941 spin_unlock_irqrestore(&ring->lock, flags); 942 } 943 944 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget) 945 { 946 struct bcm_sysport_tx_ring *ring = 947 container_of(napi, struct bcm_sysport_tx_ring, napi); 948 unsigned int work_done = 0; 949 950 work_done = bcm_sysport_tx_reclaim(ring->priv, ring); 951 952 if (work_done == 0) { 953 napi_complete(napi); 954 /* re-enable TX interrupt */ 955 if (!ring->priv->is_lite) 956 intrl2_1_mask_clear(ring->priv, BIT(ring->index)); 957 else 958 intrl2_0_mask_clear(ring->priv, BIT(ring->index + 959 INTRL2_0_TDMA_MBDONE_SHIFT)); 960 961 return 0; 962 } 963 964 return budget; 965 } 966 967 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv) 968 { 969 unsigned int q; 970 971 for (q = 0; q < priv->netdev->num_tx_queues; q++) 972 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]); 973 } 974 975 static int bcm_sysport_poll(struct napi_struct *napi, int budget) 976 { 977 struct bcm_sysport_priv *priv = 978 container_of(napi, struct bcm_sysport_priv, napi); 979 unsigned int work_done = 0; 980 981 work_done = bcm_sysport_desc_rx(priv, budget); 982 983 priv->rx_c_index += work_done; 984 priv->rx_c_index &= RDMA_CONS_INDEX_MASK; 985 986 /* SYSTEMPORT Lite groups the producer/consumer index, producer is 987 * maintained by HW, but writes to it will be ignore while RDMA 988 * is active 989 */ 990 if (!priv->is_lite) 991 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX); 992 else 993 rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX); 994 995 if (work_done < budget) { 996 napi_complete_done(napi, work_done); 997 /* re-enable RX interrupts */ 998 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE); 999 } 1000 1001 return work_done; 1002 } 1003 1004 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv) 1005 { 1006 u32 reg; 1007 1008 /* Stop monitoring MPD interrupt */ 1009 intrl2_0_mask_set(priv, INTRL2_0_MPD); 1010 1011 /* Clear the MagicPacket detection logic */ 1012 reg = umac_readl(priv, UMAC_MPD_CTRL); 1013 reg &= ~MPD_EN; 1014 umac_writel(priv, reg, UMAC_MPD_CTRL); 1015 1016 netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n"); 1017 } 1018 1019 /* RX and misc interrupt routine */ 1020 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id) 1021 { 1022 struct net_device *dev = dev_id; 1023 struct bcm_sysport_priv *priv = netdev_priv(dev); 1024 struct bcm_sysport_tx_ring *txr; 1025 unsigned int ring, ring_bit; 1026 1027 priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) & 1028 ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS); 1029 intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR); 1030 1031 if (unlikely(priv->irq0_stat == 0)) { 1032 netdev_warn(priv->netdev, "spurious RX interrupt\n"); 1033 return IRQ_NONE; 1034 } 1035 1036 if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) { 1037 if (likely(napi_schedule_prep(&priv->napi))) { 1038 /* disable RX interrupts */ 1039 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE); 1040 __napi_schedule_irqoff(&priv->napi); 1041 } 1042 } 1043 1044 /* TX ring is full, perform a full reclaim since we do not know 1045 * which one would trigger this interrupt 1046 */ 1047 if (priv->irq0_stat & INTRL2_0_TX_RING_FULL) 1048 bcm_sysport_tx_reclaim_all(priv); 1049 1050 if (priv->irq0_stat & INTRL2_0_MPD) { 1051 netdev_info(priv->netdev, "Wake-on-LAN interrupt!\n"); 1052 bcm_sysport_resume_from_wol(priv); 1053 } 1054 1055 if (!priv->is_lite) 1056 goto out; 1057 1058 for (ring = 0; ring < dev->num_tx_queues; ring++) { 1059 ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT); 1060 if (!(priv->irq0_stat & ring_bit)) 1061 continue; 1062 1063 txr = &priv->tx_rings[ring]; 1064 1065 if (likely(napi_schedule_prep(&txr->napi))) { 1066 intrl2_0_mask_set(priv, ring_bit); 1067 __napi_schedule(&txr->napi); 1068 } 1069 } 1070 out: 1071 return IRQ_HANDLED; 1072 } 1073 1074 /* TX interrupt service routine */ 1075 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id) 1076 { 1077 struct net_device *dev = dev_id; 1078 struct bcm_sysport_priv *priv = netdev_priv(dev); 1079 struct bcm_sysport_tx_ring *txr; 1080 unsigned int ring; 1081 1082 priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) & 1083 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS); 1084 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); 1085 1086 if (unlikely(priv->irq1_stat == 0)) { 1087 netdev_warn(priv->netdev, "spurious TX interrupt\n"); 1088 return IRQ_NONE; 1089 } 1090 1091 for (ring = 0; ring < dev->num_tx_queues; ring++) { 1092 if (!(priv->irq1_stat & BIT(ring))) 1093 continue; 1094 1095 txr = &priv->tx_rings[ring]; 1096 1097 if (likely(napi_schedule_prep(&txr->napi))) { 1098 intrl2_1_mask_set(priv, BIT(ring)); 1099 __napi_schedule_irqoff(&txr->napi); 1100 } 1101 } 1102 1103 return IRQ_HANDLED; 1104 } 1105 1106 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id) 1107 { 1108 struct bcm_sysport_priv *priv = dev_id; 1109 1110 pm_wakeup_event(&priv->pdev->dev, 0); 1111 1112 return IRQ_HANDLED; 1113 } 1114 1115 #ifdef CONFIG_NET_POLL_CONTROLLER 1116 static void bcm_sysport_poll_controller(struct net_device *dev) 1117 { 1118 struct bcm_sysport_priv *priv = netdev_priv(dev); 1119 1120 disable_irq(priv->irq0); 1121 bcm_sysport_rx_isr(priv->irq0, priv); 1122 enable_irq(priv->irq0); 1123 1124 if (!priv->is_lite) { 1125 disable_irq(priv->irq1); 1126 bcm_sysport_tx_isr(priv->irq1, priv); 1127 enable_irq(priv->irq1); 1128 } 1129 } 1130 #endif 1131 1132 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb, 1133 struct net_device *dev) 1134 { 1135 struct sk_buff *nskb; 1136 struct bcm_tsb *tsb; 1137 u32 csum_info; 1138 u8 ip_proto; 1139 u16 csum_start; 1140 u16 ip_ver; 1141 1142 /* Re-allocate SKB if needed */ 1143 if (unlikely(skb_headroom(skb) < sizeof(*tsb))) { 1144 nskb = skb_realloc_headroom(skb, sizeof(*tsb)); 1145 dev_kfree_skb(skb); 1146 if (!nskb) { 1147 dev->stats.tx_errors++; 1148 dev->stats.tx_dropped++; 1149 return NULL; 1150 } 1151 skb = nskb; 1152 } 1153 1154 tsb = skb_push(skb, sizeof(*tsb)); 1155 /* Zero-out TSB by default */ 1156 memset(tsb, 0, sizeof(*tsb)); 1157 1158 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1159 ip_ver = htons(skb->protocol); 1160 switch (ip_ver) { 1161 case ETH_P_IP: 1162 ip_proto = ip_hdr(skb)->protocol; 1163 break; 1164 case ETH_P_IPV6: 1165 ip_proto = ipv6_hdr(skb)->nexthdr; 1166 break; 1167 default: 1168 return skb; 1169 } 1170 1171 /* Get the checksum offset and the L4 (transport) offset */ 1172 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb); 1173 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK; 1174 csum_info |= (csum_start << L4_PTR_SHIFT); 1175 1176 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) { 1177 csum_info |= L4_LENGTH_VALID; 1178 if (ip_proto == IPPROTO_UDP && ip_ver == ETH_P_IP) 1179 csum_info |= L4_UDP; 1180 } else { 1181 csum_info = 0; 1182 } 1183 1184 tsb->l4_ptr_dest_map = csum_info; 1185 } 1186 1187 return skb; 1188 } 1189 1190 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb, 1191 struct net_device *dev) 1192 { 1193 struct bcm_sysport_priv *priv = netdev_priv(dev); 1194 struct device *kdev = &priv->pdev->dev; 1195 struct bcm_sysport_tx_ring *ring; 1196 struct bcm_sysport_cb *cb; 1197 struct netdev_queue *txq; 1198 struct dma_desc *desc; 1199 unsigned int skb_len; 1200 unsigned long flags; 1201 dma_addr_t mapping; 1202 u32 len_status; 1203 u16 queue; 1204 int ret; 1205 1206 queue = skb_get_queue_mapping(skb); 1207 txq = netdev_get_tx_queue(dev, queue); 1208 ring = &priv->tx_rings[queue]; 1209 1210 /* lock against tx reclaim in BH context and TX ring full interrupt */ 1211 spin_lock_irqsave(&ring->lock, flags); 1212 if (unlikely(ring->desc_count == 0)) { 1213 netif_tx_stop_queue(txq); 1214 netdev_err(dev, "queue %d awake and ring full!\n", queue); 1215 ret = NETDEV_TX_BUSY; 1216 goto out; 1217 } 1218 1219 /* Insert TSB and checksum infos */ 1220 if (priv->tsb_en) { 1221 skb = bcm_sysport_insert_tsb(skb, dev); 1222 if (!skb) { 1223 ret = NETDEV_TX_OK; 1224 goto out; 1225 } 1226 } 1227 1228 skb_len = skb->len; 1229 1230 mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE); 1231 if (dma_mapping_error(kdev, mapping)) { 1232 priv->mib.tx_dma_failed++; 1233 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n", 1234 skb->data, skb_len); 1235 ret = NETDEV_TX_OK; 1236 goto out; 1237 } 1238 1239 /* Remember the SKB for future freeing */ 1240 cb = &ring->cbs[ring->curr_desc]; 1241 cb->skb = skb; 1242 dma_unmap_addr_set(cb, dma_addr, mapping); 1243 dma_unmap_len_set(cb, dma_len, skb_len); 1244 1245 /* Fetch a descriptor entry from our pool */ 1246 desc = ring->desc_cpu; 1247 1248 desc->addr_lo = lower_32_bits(mapping); 1249 len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK; 1250 len_status |= (skb_len << DESC_LEN_SHIFT); 1251 len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) << 1252 DESC_STATUS_SHIFT; 1253 if (skb->ip_summed == CHECKSUM_PARTIAL) 1254 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT); 1255 1256 ring->curr_desc++; 1257 if (ring->curr_desc == ring->size) 1258 ring->curr_desc = 0; 1259 ring->desc_count--; 1260 1261 /* Ensure write completion of the descriptor status/length 1262 * in DRAM before the System Port WRITE_PORT register latches 1263 * the value 1264 */ 1265 wmb(); 1266 desc->addr_status_len = len_status; 1267 wmb(); 1268 1269 /* Write this descriptor address to the RING write port */ 1270 tdma_port_write_desc_addr(priv, desc, ring->index); 1271 1272 /* Check ring space and update SW control flow */ 1273 if (ring->desc_count == 0) 1274 netif_tx_stop_queue(txq); 1275 1276 netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n", 1277 ring->index, ring->desc_count, ring->curr_desc); 1278 1279 ret = NETDEV_TX_OK; 1280 out: 1281 spin_unlock_irqrestore(&ring->lock, flags); 1282 return ret; 1283 } 1284 1285 static void bcm_sysport_tx_timeout(struct net_device *dev) 1286 { 1287 netdev_warn(dev, "transmit timeout!\n"); 1288 1289 netif_trans_update(dev); 1290 dev->stats.tx_errors++; 1291 1292 netif_tx_wake_all_queues(dev); 1293 } 1294 1295 /* phylib adjust link callback */ 1296 static void bcm_sysport_adj_link(struct net_device *dev) 1297 { 1298 struct bcm_sysport_priv *priv = netdev_priv(dev); 1299 struct phy_device *phydev = dev->phydev; 1300 unsigned int changed = 0; 1301 u32 cmd_bits = 0, reg; 1302 1303 if (priv->old_link != phydev->link) { 1304 changed = 1; 1305 priv->old_link = phydev->link; 1306 } 1307 1308 if (priv->old_duplex != phydev->duplex) { 1309 changed = 1; 1310 priv->old_duplex = phydev->duplex; 1311 } 1312 1313 if (priv->is_lite) 1314 goto out; 1315 1316 switch (phydev->speed) { 1317 case SPEED_2500: 1318 cmd_bits = CMD_SPEED_2500; 1319 break; 1320 case SPEED_1000: 1321 cmd_bits = CMD_SPEED_1000; 1322 break; 1323 case SPEED_100: 1324 cmd_bits = CMD_SPEED_100; 1325 break; 1326 case SPEED_10: 1327 cmd_bits = CMD_SPEED_10; 1328 break; 1329 default: 1330 break; 1331 } 1332 cmd_bits <<= CMD_SPEED_SHIFT; 1333 1334 if (phydev->duplex == DUPLEX_HALF) 1335 cmd_bits |= CMD_HD_EN; 1336 1337 if (priv->old_pause != phydev->pause) { 1338 changed = 1; 1339 priv->old_pause = phydev->pause; 1340 } 1341 1342 if (!phydev->pause) 1343 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE; 1344 1345 if (!changed) 1346 return; 1347 1348 if (phydev->link) { 1349 reg = umac_readl(priv, UMAC_CMD); 1350 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) | 1351 CMD_HD_EN | CMD_RX_PAUSE_IGNORE | 1352 CMD_TX_PAUSE_IGNORE); 1353 reg |= cmd_bits; 1354 umac_writel(priv, reg, UMAC_CMD); 1355 } 1356 out: 1357 if (changed) 1358 phy_print_status(phydev); 1359 } 1360 1361 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv, 1362 unsigned int index) 1363 { 1364 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index]; 1365 struct device *kdev = &priv->pdev->dev; 1366 size_t size; 1367 void *p; 1368 u32 reg; 1369 1370 /* Simple descriptors partitioning for now */ 1371 size = 256; 1372 1373 /* We just need one DMA descriptor which is DMA-able, since writing to 1374 * the port will allocate a new descriptor in its internal linked-list 1375 */ 1376 p = dma_zalloc_coherent(kdev, sizeof(struct dma_desc), &ring->desc_dma, 1377 GFP_KERNEL); 1378 if (!p) { 1379 netif_err(priv, hw, priv->netdev, "DMA alloc failed\n"); 1380 return -ENOMEM; 1381 } 1382 1383 ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL); 1384 if (!ring->cbs) { 1385 dma_free_coherent(kdev, sizeof(struct dma_desc), 1386 ring->desc_cpu, ring->desc_dma); 1387 netif_err(priv, hw, priv->netdev, "CB allocation failed\n"); 1388 return -ENOMEM; 1389 } 1390 1391 /* Initialize SW view of the ring */ 1392 spin_lock_init(&ring->lock); 1393 ring->priv = priv; 1394 netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64); 1395 ring->index = index; 1396 ring->size = size; 1397 ring->alloc_size = ring->size; 1398 ring->desc_cpu = p; 1399 ring->desc_count = ring->size; 1400 ring->curr_desc = 0; 1401 1402 /* Initialize HW ring */ 1403 tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index)); 1404 tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index)); 1405 tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index)); 1406 tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index)); 1407 1408 /* Configure QID and port mapping */ 1409 reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index)); 1410 reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT); 1411 if (ring->inspect) { 1412 reg |= ring->switch_queue & RING_QID_MASK; 1413 reg |= ring->switch_port << RING_PORT_ID_SHIFT; 1414 } else { 1415 reg |= RING_IGNORE_STATUS; 1416 } 1417 tdma_writel(priv, reg, TDMA_DESC_RING_MAPPING(index)); 1418 tdma_writel(priv, 0, TDMA_DESC_RING_PCP_DEI_VID(index)); 1419 1420 /* Enable ACB algorithm 2 */ 1421 reg = tdma_readl(priv, TDMA_CONTROL); 1422 reg |= tdma_control_bit(priv, ACB_ALGO); 1423 tdma_writel(priv, reg, TDMA_CONTROL); 1424 1425 /* Do not use tdma_control_bit() here because TSB_SWAP1 collides 1426 * with the original definition of ACB_ALGO 1427 */ 1428 reg = tdma_readl(priv, TDMA_CONTROL); 1429 if (priv->is_lite) 1430 reg &= ~BIT(TSB_SWAP1); 1431 /* Set a correct TSB format based on host endian */ 1432 if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)) 1433 reg |= tdma_control_bit(priv, TSB_SWAP0); 1434 else 1435 reg &= ~tdma_control_bit(priv, TSB_SWAP0); 1436 tdma_writel(priv, reg, TDMA_CONTROL); 1437 1438 /* Program the number of descriptors as MAX_THRESHOLD and half of 1439 * its size for the hysteresis trigger 1440 */ 1441 tdma_writel(priv, ring->size | 1442 1 << RING_HYST_THRESH_SHIFT, 1443 TDMA_DESC_RING_MAX_HYST(index)); 1444 1445 /* Enable the ring queue in the arbiter */ 1446 reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN); 1447 reg |= (1 << index); 1448 tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN); 1449 1450 napi_enable(&ring->napi); 1451 1452 netif_dbg(priv, hw, priv->netdev, 1453 "TDMA cfg, size=%d, desc_cpu=%p switch q=%d,port=%d\n", 1454 ring->size, ring->desc_cpu, ring->switch_queue, 1455 ring->switch_port); 1456 1457 return 0; 1458 } 1459 1460 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv, 1461 unsigned int index) 1462 { 1463 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index]; 1464 struct device *kdev = &priv->pdev->dev; 1465 u32 reg; 1466 1467 /* Caller should stop the TDMA engine */ 1468 reg = tdma_readl(priv, TDMA_STATUS); 1469 if (!(reg & TDMA_DISABLED)) 1470 netdev_warn(priv->netdev, "TDMA not stopped!\n"); 1471 1472 /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could 1473 * fail, so by checking this pointer we know whether the TX ring was 1474 * fully initialized or not. 1475 */ 1476 if (!ring->cbs) 1477 return; 1478 1479 napi_disable(&ring->napi); 1480 netif_napi_del(&ring->napi); 1481 1482 bcm_sysport_tx_clean(priv, ring); 1483 1484 kfree(ring->cbs); 1485 ring->cbs = NULL; 1486 1487 if (ring->desc_dma) { 1488 dma_free_coherent(kdev, sizeof(struct dma_desc), 1489 ring->desc_cpu, ring->desc_dma); 1490 ring->desc_dma = 0; 1491 } 1492 ring->size = 0; 1493 ring->alloc_size = 0; 1494 1495 netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n"); 1496 } 1497 1498 /* RDMA helper */ 1499 static inline int rdma_enable_set(struct bcm_sysport_priv *priv, 1500 unsigned int enable) 1501 { 1502 unsigned int timeout = 1000; 1503 u32 reg; 1504 1505 reg = rdma_readl(priv, RDMA_CONTROL); 1506 if (enable) 1507 reg |= RDMA_EN; 1508 else 1509 reg &= ~RDMA_EN; 1510 rdma_writel(priv, reg, RDMA_CONTROL); 1511 1512 /* Poll for RMDA disabling completion */ 1513 do { 1514 reg = rdma_readl(priv, RDMA_STATUS); 1515 if (!!(reg & RDMA_DISABLED) == !enable) 1516 return 0; 1517 usleep_range(1000, 2000); 1518 } while (timeout-- > 0); 1519 1520 netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n"); 1521 1522 return -ETIMEDOUT; 1523 } 1524 1525 /* TDMA helper */ 1526 static inline int tdma_enable_set(struct bcm_sysport_priv *priv, 1527 unsigned int enable) 1528 { 1529 unsigned int timeout = 1000; 1530 u32 reg; 1531 1532 reg = tdma_readl(priv, TDMA_CONTROL); 1533 if (enable) 1534 reg |= tdma_control_bit(priv, TDMA_EN); 1535 else 1536 reg &= ~tdma_control_bit(priv, TDMA_EN); 1537 tdma_writel(priv, reg, TDMA_CONTROL); 1538 1539 /* Poll for TMDA disabling completion */ 1540 do { 1541 reg = tdma_readl(priv, TDMA_STATUS); 1542 if (!!(reg & TDMA_DISABLED) == !enable) 1543 return 0; 1544 1545 usleep_range(1000, 2000); 1546 } while (timeout-- > 0); 1547 1548 netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n"); 1549 1550 return -ETIMEDOUT; 1551 } 1552 1553 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv) 1554 { 1555 struct bcm_sysport_cb *cb; 1556 u32 reg; 1557 int ret; 1558 int i; 1559 1560 /* Initialize SW view of the RX ring */ 1561 priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC; 1562 priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET; 1563 priv->rx_c_index = 0; 1564 priv->rx_read_ptr = 0; 1565 priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb), 1566 GFP_KERNEL); 1567 if (!priv->rx_cbs) { 1568 netif_err(priv, hw, priv->netdev, "CB allocation failed\n"); 1569 return -ENOMEM; 1570 } 1571 1572 for (i = 0; i < priv->num_rx_bds; i++) { 1573 cb = priv->rx_cbs + i; 1574 cb->bd_addr = priv->rx_bds + i * DESC_SIZE; 1575 } 1576 1577 ret = bcm_sysport_alloc_rx_bufs(priv); 1578 if (ret) { 1579 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n"); 1580 return ret; 1581 } 1582 1583 /* Initialize HW, ensure RDMA is disabled */ 1584 reg = rdma_readl(priv, RDMA_STATUS); 1585 if (!(reg & RDMA_DISABLED)) 1586 rdma_enable_set(priv, 0); 1587 1588 rdma_writel(priv, 0, RDMA_WRITE_PTR_LO); 1589 rdma_writel(priv, 0, RDMA_WRITE_PTR_HI); 1590 rdma_writel(priv, 0, RDMA_PROD_INDEX); 1591 rdma_writel(priv, 0, RDMA_CONS_INDEX); 1592 rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT | 1593 RX_BUF_LENGTH, RDMA_RING_BUF_SIZE); 1594 /* Operate the queue in ring mode */ 1595 rdma_writel(priv, 0, RDMA_START_ADDR_HI); 1596 rdma_writel(priv, 0, RDMA_START_ADDR_LO); 1597 rdma_writel(priv, 0, RDMA_END_ADDR_HI); 1598 rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO); 1599 1600 rdma_writel(priv, 1, RDMA_MBDONE_INTR); 1601 1602 netif_dbg(priv, hw, priv->netdev, 1603 "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n", 1604 priv->num_rx_bds, priv->rx_bds); 1605 1606 return 0; 1607 } 1608 1609 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv) 1610 { 1611 struct bcm_sysport_cb *cb; 1612 unsigned int i; 1613 u32 reg; 1614 1615 /* Caller should ensure RDMA is disabled */ 1616 reg = rdma_readl(priv, RDMA_STATUS); 1617 if (!(reg & RDMA_DISABLED)) 1618 netdev_warn(priv->netdev, "RDMA not stopped!\n"); 1619 1620 for (i = 0; i < priv->num_rx_bds; i++) { 1621 cb = &priv->rx_cbs[i]; 1622 if (dma_unmap_addr(cb, dma_addr)) 1623 dma_unmap_single(&priv->pdev->dev, 1624 dma_unmap_addr(cb, dma_addr), 1625 RX_BUF_LENGTH, DMA_FROM_DEVICE); 1626 bcm_sysport_free_cb(cb); 1627 } 1628 1629 kfree(priv->rx_cbs); 1630 priv->rx_cbs = NULL; 1631 1632 netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n"); 1633 } 1634 1635 static void bcm_sysport_set_rx_mode(struct net_device *dev) 1636 { 1637 struct bcm_sysport_priv *priv = netdev_priv(dev); 1638 u32 reg; 1639 1640 if (priv->is_lite) 1641 return; 1642 1643 reg = umac_readl(priv, UMAC_CMD); 1644 if (dev->flags & IFF_PROMISC) 1645 reg |= CMD_PROMISC; 1646 else 1647 reg &= ~CMD_PROMISC; 1648 umac_writel(priv, reg, UMAC_CMD); 1649 1650 /* No support for ALLMULTI */ 1651 if (dev->flags & IFF_ALLMULTI) 1652 return; 1653 } 1654 1655 static inline void umac_enable_set(struct bcm_sysport_priv *priv, 1656 u32 mask, unsigned int enable) 1657 { 1658 u32 reg; 1659 1660 if (!priv->is_lite) { 1661 reg = umac_readl(priv, UMAC_CMD); 1662 if (enable) 1663 reg |= mask; 1664 else 1665 reg &= ~mask; 1666 umac_writel(priv, reg, UMAC_CMD); 1667 } else { 1668 reg = gib_readl(priv, GIB_CONTROL); 1669 if (enable) 1670 reg |= mask; 1671 else 1672 reg &= ~mask; 1673 gib_writel(priv, reg, GIB_CONTROL); 1674 } 1675 1676 /* UniMAC stops on a packet boundary, wait for a full-sized packet 1677 * to be processed (1 msec). 1678 */ 1679 if (enable == 0) 1680 usleep_range(1000, 2000); 1681 } 1682 1683 static inline void umac_reset(struct bcm_sysport_priv *priv) 1684 { 1685 u32 reg; 1686 1687 if (priv->is_lite) 1688 return; 1689 1690 reg = umac_readl(priv, UMAC_CMD); 1691 reg |= CMD_SW_RESET; 1692 umac_writel(priv, reg, UMAC_CMD); 1693 udelay(10); 1694 reg = umac_readl(priv, UMAC_CMD); 1695 reg &= ~CMD_SW_RESET; 1696 umac_writel(priv, reg, UMAC_CMD); 1697 } 1698 1699 static void umac_set_hw_addr(struct bcm_sysport_priv *priv, 1700 unsigned char *addr) 1701 { 1702 u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | 1703 addr[3]; 1704 u32 mac1 = (addr[4] << 8) | addr[5]; 1705 1706 if (!priv->is_lite) { 1707 umac_writel(priv, mac0, UMAC_MAC0); 1708 umac_writel(priv, mac1, UMAC_MAC1); 1709 } else { 1710 gib_writel(priv, mac0, GIB_MAC0); 1711 gib_writel(priv, mac1, GIB_MAC1); 1712 } 1713 } 1714 1715 static void topctrl_flush(struct bcm_sysport_priv *priv) 1716 { 1717 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL); 1718 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL); 1719 mdelay(1); 1720 topctrl_writel(priv, 0, RX_FLUSH_CNTL); 1721 topctrl_writel(priv, 0, TX_FLUSH_CNTL); 1722 } 1723 1724 static int bcm_sysport_change_mac(struct net_device *dev, void *p) 1725 { 1726 struct bcm_sysport_priv *priv = netdev_priv(dev); 1727 struct sockaddr *addr = p; 1728 1729 if (!is_valid_ether_addr(addr->sa_data)) 1730 return -EINVAL; 1731 1732 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); 1733 1734 /* interface is disabled, changes to MAC will be reflected on next 1735 * open call 1736 */ 1737 if (!netif_running(dev)) 1738 return 0; 1739 1740 umac_set_hw_addr(priv, dev->dev_addr); 1741 1742 return 0; 1743 } 1744 1745 static void bcm_sysport_get_stats64(struct net_device *dev, 1746 struct rtnl_link_stats64 *stats) 1747 { 1748 struct bcm_sysport_priv *priv = netdev_priv(dev); 1749 struct bcm_sysport_stats64 *stats64 = &priv->stats64; 1750 unsigned int start; 1751 1752 netdev_stats_to_stats64(stats, &dev->stats); 1753 1754 bcm_sysport_update_tx_stats(priv, &stats->tx_bytes, 1755 &stats->tx_packets); 1756 1757 do { 1758 start = u64_stats_fetch_begin_irq(&priv->syncp); 1759 stats->rx_packets = stats64->rx_packets; 1760 stats->rx_bytes = stats64->rx_bytes; 1761 } while (u64_stats_fetch_retry_irq(&priv->syncp, start)); 1762 } 1763 1764 static void bcm_sysport_netif_start(struct net_device *dev) 1765 { 1766 struct bcm_sysport_priv *priv = netdev_priv(dev); 1767 1768 /* Enable NAPI */ 1769 napi_enable(&priv->napi); 1770 1771 /* Enable RX interrupt and TX ring full interrupt */ 1772 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL); 1773 1774 phy_start(dev->phydev); 1775 1776 /* Enable TX interrupts for the TXQs */ 1777 if (!priv->is_lite) 1778 intrl2_1_mask_clear(priv, 0xffffffff); 1779 else 1780 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK); 1781 1782 /* Last call before we start the real business */ 1783 netif_tx_start_all_queues(dev); 1784 } 1785 1786 static void rbuf_init(struct bcm_sysport_priv *priv) 1787 { 1788 u32 reg; 1789 1790 reg = rbuf_readl(priv, RBUF_CONTROL); 1791 reg |= RBUF_4B_ALGN | RBUF_RSB_EN; 1792 /* Set a correct RSB format on SYSTEMPORT Lite */ 1793 if (priv->is_lite) 1794 reg &= ~RBUF_RSB_SWAP1; 1795 1796 /* Set a correct RSB format based on host endian */ 1797 if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)) 1798 reg |= RBUF_RSB_SWAP0; 1799 else 1800 reg &= ~RBUF_RSB_SWAP0; 1801 rbuf_writel(priv, reg, RBUF_CONTROL); 1802 } 1803 1804 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv) 1805 { 1806 intrl2_0_mask_set(priv, 0xffffffff); 1807 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); 1808 if (!priv->is_lite) { 1809 intrl2_1_mask_set(priv, 0xffffffff); 1810 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); 1811 } 1812 } 1813 1814 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv) 1815 { 1816 u32 reg; 1817 1818 reg = gib_readl(priv, GIB_CONTROL); 1819 /* Include Broadcom tag in pad extension and fix up IPG_LENGTH */ 1820 if (netdev_uses_dsa(priv->netdev)) { 1821 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT); 1822 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT; 1823 } 1824 reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT); 1825 reg |= 12 << GIB_IPG_LEN_SHIFT; 1826 gib_writel(priv, reg, GIB_CONTROL); 1827 } 1828 1829 static int bcm_sysport_open(struct net_device *dev) 1830 { 1831 struct bcm_sysport_priv *priv = netdev_priv(dev); 1832 struct phy_device *phydev; 1833 unsigned int i; 1834 int ret; 1835 1836 /* Reset UniMAC */ 1837 umac_reset(priv); 1838 1839 /* Flush TX and RX FIFOs at TOPCTRL level */ 1840 topctrl_flush(priv); 1841 1842 /* Disable the UniMAC RX/TX */ 1843 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0); 1844 1845 /* Enable RBUF 2bytes alignment and Receive Status Block */ 1846 rbuf_init(priv); 1847 1848 /* Set maximum frame length */ 1849 if (!priv->is_lite) 1850 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN); 1851 else 1852 gib_set_pad_extension(priv); 1853 1854 /* Set MAC address */ 1855 umac_set_hw_addr(priv, dev->dev_addr); 1856 1857 /* Read CRC forward */ 1858 if (!priv->is_lite) 1859 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD); 1860 else 1861 priv->crc_fwd = !!(gib_readl(priv, GIB_CONTROL) & 1862 GIB_FCS_STRIP); 1863 1864 phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link, 1865 0, priv->phy_interface); 1866 if (!phydev) { 1867 netdev_err(dev, "could not attach to PHY\n"); 1868 return -ENODEV; 1869 } 1870 1871 /* Reset house keeping link status */ 1872 priv->old_duplex = -1; 1873 priv->old_link = -1; 1874 priv->old_pause = -1; 1875 1876 /* mask all interrupts and request them */ 1877 bcm_sysport_mask_all_intrs(priv); 1878 1879 ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev); 1880 if (ret) { 1881 netdev_err(dev, "failed to request RX interrupt\n"); 1882 goto out_phy_disconnect; 1883 } 1884 1885 if (!priv->is_lite) { 1886 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0, 1887 dev->name, dev); 1888 if (ret) { 1889 netdev_err(dev, "failed to request TX interrupt\n"); 1890 goto out_free_irq0; 1891 } 1892 } 1893 1894 /* Initialize both hardware and software ring */ 1895 for (i = 0; i < dev->num_tx_queues; i++) { 1896 ret = bcm_sysport_init_tx_ring(priv, i); 1897 if (ret) { 1898 netdev_err(dev, "failed to initialize TX ring %d\n", 1899 i); 1900 goto out_free_tx_ring; 1901 } 1902 } 1903 1904 /* Initialize linked-list */ 1905 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS); 1906 1907 /* Initialize RX ring */ 1908 ret = bcm_sysport_init_rx_ring(priv); 1909 if (ret) { 1910 netdev_err(dev, "failed to initialize RX ring\n"); 1911 goto out_free_rx_ring; 1912 } 1913 1914 /* Turn on RDMA */ 1915 ret = rdma_enable_set(priv, 1); 1916 if (ret) 1917 goto out_free_rx_ring; 1918 1919 /* Turn on TDMA */ 1920 ret = tdma_enable_set(priv, 1); 1921 if (ret) 1922 goto out_clear_rx_int; 1923 1924 /* Turn on UniMAC TX/RX */ 1925 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1); 1926 1927 bcm_sysport_netif_start(dev); 1928 1929 return 0; 1930 1931 out_clear_rx_int: 1932 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL); 1933 out_free_rx_ring: 1934 bcm_sysport_fini_rx_ring(priv); 1935 out_free_tx_ring: 1936 for (i = 0; i < dev->num_tx_queues; i++) 1937 bcm_sysport_fini_tx_ring(priv, i); 1938 if (!priv->is_lite) 1939 free_irq(priv->irq1, dev); 1940 out_free_irq0: 1941 free_irq(priv->irq0, dev); 1942 out_phy_disconnect: 1943 phy_disconnect(phydev); 1944 return ret; 1945 } 1946 1947 static void bcm_sysport_netif_stop(struct net_device *dev) 1948 { 1949 struct bcm_sysport_priv *priv = netdev_priv(dev); 1950 1951 /* stop all software from updating hardware */ 1952 netif_tx_stop_all_queues(dev); 1953 napi_disable(&priv->napi); 1954 phy_stop(dev->phydev); 1955 1956 /* mask all interrupts */ 1957 bcm_sysport_mask_all_intrs(priv); 1958 } 1959 1960 static int bcm_sysport_stop(struct net_device *dev) 1961 { 1962 struct bcm_sysport_priv *priv = netdev_priv(dev); 1963 unsigned int i; 1964 int ret; 1965 1966 bcm_sysport_netif_stop(dev); 1967 1968 /* Disable UniMAC RX */ 1969 umac_enable_set(priv, CMD_RX_EN, 0); 1970 1971 ret = tdma_enable_set(priv, 0); 1972 if (ret) { 1973 netdev_err(dev, "timeout disabling RDMA\n"); 1974 return ret; 1975 } 1976 1977 /* Wait for a maximum packet size to be drained */ 1978 usleep_range(2000, 3000); 1979 1980 ret = rdma_enable_set(priv, 0); 1981 if (ret) { 1982 netdev_err(dev, "timeout disabling TDMA\n"); 1983 return ret; 1984 } 1985 1986 /* Disable UniMAC TX */ 1987 umac_enable_set(priv, CMD_TX_EN, 0); 1988 1989 /* Free RX/TX rings SW structures */ 1990 for (i = 0; i < dev->num_tx_queues; i++) 1991 bcm_sysport_fini_tx_ring(priv, i); 1992 bcm_sysport_fini_rx_ring(priv); 1993 1994 free_irq(priv->irq0, dev); 1995 if (!priv->is_lite) 1996 free_irq(priv->irq1, dev); 1997 1998 /* Disconnect from PHY */ 1999 phy_disconnect(dev->phydev); 2000 2001 return 0; 2002 } 2003 2004 static const struct ethtool_ops bcm_sysport_ethtool_ops = { 2005 .get_drvinfo = bcm_sysport_get_drvinfo, 2006 .get_msglevel = bcm_sysport_get_msglvl, 2007 .set_msglevel = bcm_sysport_set_msglvl, 2008 .get_link = ethtool_op_get_link, 2009 .get_strings = bcm_sysport_get_strings, 2010 .get_ethtool_stats = bcm_sysport_get_stats, 2011 .get_sset_count = bcm_sysport_get_sset_count, 2012 .get_wol = bcm_sysport_get_wol, 2013 .set_wol = bcm_sysport_set_wol, 2014 .get_coalesce = bcm_sysport_get_coalesce, 2015 .set_coalesce = bcm_sysport_set_coalesce, 2016 .get_link_ksettings = phy_ethtool_get_link_ksettings, 2017 .set_link_ksettings = phy_ethtool_set_link_ksettings, 2018 }; 2019 2020 static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb, 2021 void *accel_priv, 2022 select_queue_fallback_t fallback) 2023 { 2024 struct bcm_sysport_priv *priv = netdev_priv(dev); 2025 u16 queue = skb_get_queue_mapping(skb); 2026 struct bcm_sysport_tx_ring *tx_ring; 2027 unsigned int q, port; 2028 2029 if (!netdev_uses_dsa(dev)) 2030 return fallback(dev, skb); 2031 2032 /* DSA tagging layer will have configured the correct queue */ 2033 q = BRCM_TAG_GET_QUEUE(queue); 2034 port = BRCM_TAG_GET_PORT(queue); 2035 tx_ring = priv->ring_map[q + port * priv->per_port_num_tx_queues]; 2036 2037 if (unlikely(!tx_ring)) 2038 return fallback(dev, skb); 2039 2040 return tx_ring->index; 2041 } 2042 2043 static const struct net_device_ops bcm_sysport_netdev_ops = { 2044 .ndo_start_xmit = bcm_sysport_xmit, 2045 .ndo_tx_timeout = bcm_sysport_tx_timeout, 2046 .ndo_open = bcm_sysport_open, 2047 .ndo_stop = bcm_sysport_stop, 2048 .ndo_set_features = bcm_sysport_set_features, 2049 .ndo_set_rx_mode = bcm_sysport_set_rx_mode, 2050 .ndo_set_mac_address = bcm_sysport_change_mac, 2051 #ifdef CONFIG_NET_POLL_CONTROLLER 2052 .ndo_poll_controller = bcm_sysport_poll_controller, 2053 #endif 2054 .ndo_get_stats64 = bcm_sysport_get_stats64, 2055 .ndo_select_queue = bcm_sysport_select_queue, 2056 }; 2057 2058 static int bcm_sysport_map_queues(struct net_device *dev, 2059 struct dsa_notifier_register_info *info) 2060 { 2061 struct bcm_sysport_priv *priv = netdev_priv(dev); 2062 struct bcm_sysport_tx_ring *ring; 2063 struct net_device *slave_dev; 2064 unsigned int num_tx_queues; 2065 unsigned int q, start, port; 2066 2067 /* We can't be setting up queue inspection for non directly attached 2068 * switches 2069 */ 2070 if (info->switch_number) 2071 return 0; 2072 2073 if (dev->netdev_ops != &bcm_sysport_netdev_ops) 2074 return 0; 2075 2076 port = info->port_number; 2077 slave_dev = info->info.dev; 2078 2079 /* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a 2080 * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of 2081 * per-port (slave_dev) network devices queue, we achieve just that. 2082 * This need to happen now before any slave network device is used such 2083 * it accurately reflects the number of real TX queues. 2084 */ 2085 if (priv->is_lite) 2086 netif_set_real_num_tx_queues(slave_dev, 2087 slave_dev->num_tx_queues / 2); 2088 num_tx_queues = slave_dev->real_num_tx_queues; 2089 2090 if (priv->per_port_num_tx_queues && 2091 priv->per_port_num_tx_queues != num_tx_queues) 2092 netdev_warn(slave_dev, "asymetric number of per-port queues\n"); 2093 2094 priv->per_port_num_tx_queues = num_tx_queues; 2095 2096 start = find_first_zero_bit(&priv->queue_bitmap, dev->num_tx_queues); 2097 for (q = 0; q < num_tx_queues; q++) { 2098 ring = &priv->tx_rings[q + start]; 2099 2100 /* Just remember the mapping actual programming done 2101 * during bcm_sysport_init_tx_ring 2102 */ 2103 ring->switch_queue = q; 2104 ring->switch_port = port; 2105 ring->inspect = true; 2106 priv->ring_map[q + port * num_tx_queues] = ring; 2107 2108 /* Set all queues as being used now */ 2109 set_bit(q + start, &priv->queue_bitmap); 2110 } 2111 2112 return 0; 2113 } 2114 2115 static int bcm_sysport_dsa_notifier(struct notifier_block *unused, 2116 unsigned long event, void *ptr) 2117 { 2118 struct dsa_notifier_register_info *info; 2119 2120 if (event != DSA_PORT_REGISTER) 2121 return NOTIFY_DONE; 2122 2123 info = ptr; 2124 2125 return notifier_from_errno(bcm_sysport_map_queues(info->master, info)); 2126 } 2127 2128 #define REV_FMT "v%2x.%02x" 2129 2130 static const struct bcm_sysport_hw_params bcm_sysport_params[] = { 2131 [SYSTEMPORT] = { 2132 .is_lite = false, 2133 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS, 2134 }, 2135 [SYSTEMPORT_LITE] = { 2136 .is_lite = true, 2137 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS, 2138 }, 2139 }; 2140 2141 static const struct of_device_id bcm_sysport_of_match[] = { 2142 { .compatible = "brcm,systemportlite-v1.00", 2143 .data = &bcm_sysport_params[SYSTEMPORT_LITE] }, 2144 { .compatible = "brcm,systemport-v1.00", 2145 .data = &bcm_sysport_params[SYSTEMPORT] }, 2146 { .compatible = "brcm,systemport", 2147 .data = &bcm_sysport_params[SYSTEMPORT] }, 2148 { /* sentinel */ } 2149 }; 2150 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match); 2151 2152 static int bcm_sysport_probe(struct platform_device *pdev) 2153 { 2154 const struct bcm_sysport_hw_params *params; 2155 const struct of_device_id *of_id = NULL; 2156 struct bcm_sysport_priv *priv; 2157 struct device_node *dn; 2158 struct net_device *dev; 2159 const void *macaddr; 2160 struct resource *r; 2161 u32 txq, rxq; 2162 int ret; 2163 2164 dn = pdev->dev.of_node; 2165 r = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2166 of_id = of_match_node(bcm_sysport_of_match, dn); 2167 if (!of_id || !of_id->data) 2168 return -EINVAL; 2169 2170 /* Fairly quickly we need to know the type of adapter we have */ 2171 params = of_id->data; 2172 2173 /* Read the Transmit/Receive Queue properties */ 2174 if (of_property_read_u32(dn, "systemport,num-txq", &txq)) 2175 txq = TDMA_NUM_RINGS; 2176 if (of_property_read_u32(dn, "systemport,num-rxq", &rxq)) 2177 rxq = 1; 2178 2179 /* Sanity check the number of transmit queues */ 2180 if (!txq || txq > TDMA_NUM_RINGS) 2181 return -EINVAL; 2182 2183 dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq); 2184 if (!dev) 2185 return -ENOMEM; 2186 2187 /* Initialize private members */ 2188 priv = netdev_priv(dev); 2189 2190 /* Allocate number of TX rings */ 2191 priv->tx_rings = devm_kcalloc(&pdev->dev, txq, 2192 sizeof(struct bcm_sysport_tx_ring), 2193 GFP_KERNEL); 2194 if (!priv->tx_rings) 2195 return -ENOMEM; 2196 2197 priv->is_lite = params->is_lite; 2198 priv->num_rx_desc_words = params->num_rx_desc_words; 2199 2200 priv->irq0 = platform_get_irq(pdev, 0); 2201 if (!priv->is_lite) { 2202 priv->irq1 = platform_get_irq(pdev, 1); 2203 priv->wol_irq = platform_get_irq(pdev, 2); 2204 } else { 2205 priv->wol_irq = platform_get_irq(pdev, 1); 2206 } 2207 if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) { 2208 dev_err(&pdev->dev, "invalid interrupts\n"); 2209 ret = -EINVAL; 2210 goto err_free_netdev; 2211 } 2212 2213 priv->base = devm_ioremap_resource(&pdev->dev, r); 2214 if (IS_ERR(priv->base)) { 2215 ret = PTR_ERR(priv->base); 2216 goto err_free_netdev; 2217 } 2218 2219 priv->netdev = dev; 2220 priv->pdev = pdev; 2221 2222 priv->phy_interface = of_get_phy_mode(dn); 2223 /* Default to GMII interface mode */ 2224 if (priv->phy_interface < 0) 2225 priv->phy_interface = PHY_INTERFACE_MODE_GMII; 2226 2227 /* In the case of a fixed PHY, the DT node associated 2228 * to the PHY is the Ethernet MAC DT node. 2229 */ 2230 if (of_phy_is_fixed_link(dn)) { 2231 ret = of_phy_register_fixed_link(dn); 2232 if (ret) { 2233 dev_err(&pdev->dev, "failed to register fixed PHY\n"); 2234 goto err_free_netdev; 2235 } 2236 2237 priv->phy_dn = dn; 2238 } 2239 2240 /* Initialize netdevice members */ 2241 macaddr = of_get_mac_address(dn); 2242 if (!macaddr || !is_valid_ether_addr(macaddr)) { 2243 dev_warn(&pdev->dev, "using random Ethernet MAC\n"); 2244 eth_hw_addr_random(dev); 2245 } else { 2246 ether_addr_copy(dev->dev_addr, macaddr); 2247 } 2248 2249 SET_NETDEV_DEV(dev, &pdev->dev); 2250 dev_set_drvdata(&pdev->dev, dev); 2251 dev->ethtool_ops = &bcm_sysport_ethtool_ops; 2252 dev->netdev_ops = &bcm_sysport_netdev_ops; 2253 netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64); 2254 2255 /* HW supported features, none enabled by default */ 2256 dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA | 2257 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 2258 2259 /* Request the WOL interrupt and advertise suspend if available */ 2260 priv->wol_irq_disabled = 1; 2261 ret = devm_request_irq(&pdev->dev, priv->wol_irq, 2262 bcm_sysport_wol_isr, 0, dev->name, priv); 2263 if (!ret) 2264 device_set_wakeup_capable(&pdev->dev, 1); 2265 2266 /* Set the needed headroom once and for all */ 2267 BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8); 2268 dev->needed_headroom += sizeof(struct bcm_tsb); 2269 2270 /* libphy will adjust the link state accordingly */ 2271 netif_carrier_off(dev); 2272 2273 u64_stats_init(&priv->syncp); 2274 2275 priv->dsa_notifier.notifier_call = bcm_sysport_dsa_notifier; 2276 2277 ret = register_dsa_notifier(&priv->dsa_notifier); 2278 if (ret) { 2279 dev_err(&pdev->dev, "failed to register DSA notifier\n"); 2280 goto err_deregister_fixed_link; 2281 } 2282 2283 ret = register_netdev(dev); 2284 if (ret) { 2285 dev_err(&pdev->dev, "failed to register net_device\n"); 2286 goto err_deregister_notifier; 2287 } 2288 2289 priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK; 2290 dev_info(&pdev->dev, 2291 "Broadcom SYSTEMPORT%s" REV_FMT 2292 " at 0x%p (irqs: %d, %d, TXQs: %d, RXQs: %d)\n", 2293 priv->is_lite ? " Lite" : "", 2294 (priv->rev >> 8) & 0xff, priv->rev & 0xff, 2295 priv->base, priv->irq0, priv->irq1, txq, rxq); 2296 2297 return 0; 2298 2299 err_deregister_notifier: 2300 unregister_dsa_notifier(&priv->dsa_notifier); 2301 err_deregister_fixed_link: 2302 if (of_phy_is_fixed_link(dn)) 2303 of_phy_deregister_fixed_link(dn); 2304 err_free_netdev: 2305 free_netdev(dev); 2306 return ret; 2307 } 2308 2309 static int bcm_sysport_remove(struct platform_device *pdev) 2310 { 2311 struct net_device *dev = dev_get_drvdata(&pdev->dev); 2312 struct bcm_sysport_priv *priv = netdev_priv(dev); 2313 struct device_node *dn = pdev->dev.of_node; 2314 2315 /* Not much to do, ndo_close has been called 2316 * and we use managed allocations 2317 */ 2318 unregister_dsa_notifier(&priv->dsa_notifier); 2319 unregister_netdev(dev); 2320 if (of_phy_is_fixed_link(dn)) 2321 of_phy_deregister_fixed_link(dn); 2322 free_netdev(dev); 2323 dev_set_drvdata(&pdev->dev, NULL); 2324 2325 return 0; 2326 } 2327 2328 #ifdef CONFIG_PM_SLEEP 2329 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv) 2330 { 2331 struct net_device *ndev = priv->netdev; 2332 unsigned int timeout = 1000; 2333 u32 reg; 2334 2335 /* Password has already been programmed */ 2336 reg = umac_readl(priv, UMAC_MPD_CTRL); 2337 reg |= MPD_EN; 2338 reg &= ~PSW_EN; 2339 if (priv->wolopts & WAKE_MAGICSECURE) 2340 reg |= PSW_EN; 2341 umac_writel(priv, reg, UMAC_MPD_CTRL); 2342 2343 /* Make sure RBUF entered WoL mode as result */ 2344 do { 2345 reg = rbuf_readl(priv, RBUF_STATUS); 2346 if (reg & RBUF_WOL_MODE) 2347 break; 2348 2349 udelay(10); 2350 } while (timeout-- > 0); 2351 2352 /* Do not leave the UniMAC RBUF matching only MPD packets */ 2353 if (!timeout) { 2354 reg = umac_readl(priv, UMAC_MPD_CTRL); 2355 reg &= ~MPD_EN; 2356 umac_writel(priv, reg, UMAC_MPD_CTRL); 2357 netif_err(priv, wol, ndev, "failed to enter WOL mode\n"); 2358 return -ETIMEDOUT; 2359 } 2360 2361 /* UniMAC receive needs to be turned on */ 2362 umac_enable_set(priv, CMD_RX_EN, 1); 2363 2364 /* Enable the interrupt wake-up source */ 2365 intrl2_0_mask_clear(priv, INTRL2_0_MPD); 2366 2367 netif_dbg(priv, wol, ndev, "entered WOL mode\n"); 2368 2369 return 0; 2370 } 2371 2372 static int bcm_sysport_suspend(struct device *d) 2373 { 2374 struct net_device *dev = dev_get_drvdata(d); 2375 struct bcm_sysport_priv *priv = netdev_priv(dev); 2376 unsigned int i; 2377 int ret = 0; 2378 u32 reg; 2379 2380 if (!netif_running(dev)) 2381 return 0; 2382 2383 bcm_sysport_netif_stop(dev); 2384 2385 phy_suspend(dev->phydev); 2386 2387 netif_device_detach(dev); 2388 2389 /* Disable UniMAC RX */ 2390 umac_enable_set(priv, CMD_RX_EN, 0); 2391 2392 ret = rdma_enable_set(priv, 0); 2393 if (ret) { 2394 netdev_err(dev, "RDMA timeout!\n"); 2395 return ret; 2396 } 2397 2398 /* Disable RXCHK if enabled */ 2399 if (priv->rx_chk_en) { 2400 reg = rxchk_readl(priv, RXCHK_CONTROL); 2401 reg &= ~RXCHK_EN; 2402 rxchk_writel(priv, reg, RXCHK_CONTROL); 2403 } 2404 2405 /* Flush RX pipe */ 2406 if (!priv->wolopts) 2407 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL); 2408 2409 ret = tdma_enable_set(priv, 0); 2410 if (ret) { 2411 netdev_err(dev, "TDMA timeout!\n"); 2412 return ret; 2413 } 2414 2415 /* Wait for a packet boundary */ 2416 usleep_range(2000, 3000); 2417 2418 umac_enable_set(priv, CMD_TX_EN, 0); 2419 2420 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL); 2421 2422 /* Free RX/TX rings SW structures */ 2423 for (i = 0; i < dev->num_tx_queues; i++) 2424 bcm_sysport_fini_tx_ring(priv, i); 2425 bcm_sysport_fini_rx_ring(priv); 2426 2427 /* Get prepared for Wake-on-LAN */ 2428 if (device_may_wakeup(d) && priv->wolopts) 2429 ret = bcm_sysport_suspend_to_wol(priv); 2430 2431 return ret; 2432 } 2433 2434 static int bcm_sysport_resume(struct device *d) 2435 { 2436 struct net_device *dev = dev_get_drvdata(d); 2437 struct bcm_sysport_priv *priv = netdev_priv(dev); 2438 unsigned int i; 2439 u32 reg; 2440 int ret; 2441 2442 if (!netif_running(dev)) 2443 return 0; 2444 2445 umac_reset(priv); 2446 2447 /* We may have been suspended and never received a WOL event that 2448 * would turn off MPD detection, take care of that now 2449 */ 2450 bcm_sysport_resume_from_wol(priv); 2451 2452 /* Initialize both hardware and software ring */ 2453 for (i = 0; i < dev->num_tx_queues; i++) { 2454 ret = bcm_sysport_init_tx_ring(priv, i); 2455 if (ret) { 2456 netdev_err(dev, "failed to initialize TX ring %d\n", 2457 i); 2458 goto out_free_tx_rings; 2459 } 2460 } 2461 2462 /* Initialize linked-list */ 2463 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS); 2464 2465 /* Initialize RX ring */ 2466 ret = bcm_sysport_init_rx_ring(priv); 2467 if (ret) { 2468 netdev_err(dev, "failed to initialize RX ring\n"); 2469 goto out_free_rx_ring; 2470 } 2471 2472 netif_device_attach(dev); 2473 2474 /* RX pipe enable */ 2475 topctrl_writel(priv, 0, RX_FLUSH_CNTL); 2476 2477 ret = rdma_enable_set(priv, 1); 2478 if (ret) { 2479 netdev_err(dev, "failed to enable RDMA\n"); 2480 goto out_free_rx_ring; 2481 } 2482 2483 /* Enable rxhck */ 2484 if (priv->rx_chk_en) { 2485 reg = rxchk_readl(priv, RXCHK_CONTROL); 2486 reg |= RXCHK_EN; 2487 rxchk_writel(priv, reg, RXCHK_CONTROL); 2488 } 2489 2490 rbuf_init(priv); 2491 2492 /* Set maximum frame length */ 2493 if (!priv->is_lite) 2494 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN); 2495 else 2496 gib_set_pad_extension(priv); 2497 2498 /* Set MAC address */ 2499 umac_set_hw_addr(priv, dev->dev_addr); 2500 2501 umac_enable_set(priv, CMD_RX_EN, 1); 2502 2503 /* TX pipe enable */ 2504 topctrl_writel(priv, 0, TX_FLUSH_CNTL); 2505 2506 umac_enable_set(priv, CMD_TX_EN, 1); 2507 2508 ret = tdma_enable_set(priv, 1); 2509 if (ret) { 2510 netdev_err(dev, "TDMA timeout!\n"); 2511 goto out_free_rx_ring; 2512 } 2513 2514 phy_resume(dev->phydev); 2515 2516 bcm_sysport_netif_start(dev); 2517 2518 return 0; 2519 2520 out_free_rx_ring: 2521 bcm_sysport_fini_rx_ring(priv); 2522 out_free_tx_rings: 2523 for (i = 0; i < dev->num_tx_queues; i++) 2524 bcm_sysport_fini_tx_ring(priv, i); 2525 return ret; 2526 } 2527 #endif 2528 2529 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops, 2530 bcm_sysport_suspend, bcm_sysport_resume); 2531 2532 static struct platform_driver bcm_sysport_driver = { 2533 .probe = bcm_sysport_probe, 2534 .remove = bcm_sysport_remove, 2535 .driver = { 2536 .name = "brcm-systemport", 2537 .of_match_table = bcm_sysport_of_match, 2538 .pm = &bcm_sysport_pm_ops, 2539 }, 2540 }; 2541 module_platform_driver(bcm_sysport_driver); 2542 2543 MODULE_AUTHOR("Broadcom Corporation"); 2544 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver"); 2545 MODULE_ALIAS("platform:brcm-systemport"); 2546 MODULE_LICENSE("GPL"); 2547