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 /* The Ethernet switch we are interfaced with needs packets to be at 1220 * least 64 bytes (including FCS) otherwise they will be discarded when 1221 * they enter the switch port logic. When Broadcom tags are enabled, we 1222 * need to make sure that packets are at least 68 bytes 1223 * (including FCS and tag) because the length verification is done after 1224 * the Broadcom tag is stripped off the ingress packet. 1225 */ 1226 if (skb_put_padto(skb, ETH_ZLEN + ENET_BRCM_TAG_LEN)) { 1227 ret = NETDEV_TX_OK; 1228 goto out; 1229 } 1230 1231 /* Insert TSB and checksum infos */ 1232 if (priv->tsb_en) { 1233 skb = bcm_sysport_insert_tsb(skb, dev); 1234 if (!skb) { 1235 ret = NETDEV_TX_OK; 1236 goto out; 1237 } 1238 } 1239 1240 skb_len = skb->len; 1241 1242 mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE); 1243 if (dma_mapping_error(kdev, mapping)) { 1244 priv->mib.tx_dma_failed++; 1245 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n", 1246 skb->data, skb_len); 1247 ret = NETDEV_TX_OK; 1248 goto out; 1249 } 1250 1251 /* Remember the SKB for future freeing */ 1252 cb = &ring->cbs[ring->curr_desc]; 1253 cb->skb = skb; 1254 dma_unmap_addr_set(cb, dma_addr, mapping); 1255 dma_unmap_len_set(cb, dma_len, skb_len); 1256 1257 /* Fetch a descriptor entry from our pool */ 1258 desc = ring->desc_cpu; 1259 1260 desc->addr_lo = lower_32_bits(mapping); 1261 len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK; 1262 len_status |= (skb_len << DESC_LEN_SHIFT); 1263 len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) << 1264 DESC_STATUS_SHIFT; 1265 if (skb->ip_summed == CHECKSUM_PARTIAL) 1266 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT); 1267 1268 ring->curr_desc++; 1269 if (ring->curr_desc == ring->size) 1270 ring->curr_desc = 0; 1271 ring->desc_count--; 1272 1273 /* Ensure write completion of the descriptor status/length 1274 * in DRAM before the System Port WRITE_PORT register latches 1275 * the value 1276 */ 1277 wmb(); 1278 desc->addr_status_len = len_status; 1279 wmb(); 1280 1281 /* Write this descriptor address to the RING write port */ 1282 tdma_port_write_desc_addr(priv, desc, ring->index); 1283 1284 /* Check ring space and update SW control flow */ 1285 if (ring->desc_count == 0) 1286 netif_tx_stop_queue(txq); 1287 1288 netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n", 1289 ring->index, ring->desc_count, ring->curr_desc); 1290 1291 ret = NETDEV_TX_OK; 1292 out: 1293 spin_unlock_irqrestore(&ring->lock, flags); 1294 return ret; 1295 } 1296 1297 static void bcm_sysport_tx_timeout(struct net_device *dev) 1298 { 1299 netdev_warn(dev, "transmit timeout!\n"); 1300 1301 netif_trans_update(dev); 1302 dev->stats.tx_errors++; 1303 1304 netif_tx_wake_all_queues(dev); 1305 } 1306 1307 /* phylib adjust link callback */ 1308 static void bcm_sysport_adj_link(struct net_device *dev) 1309 { 1310 struct bcm_sysport_priv *priv = netdev_priv(dev); 1311 struct phy_device *phydev = dev->phydev; 1312 unsigned int changed = 0; 1313 u32 cmd_bits = 0, reg; 1314 1315 if (priv->old_link != phydev->link) { 1316 changed = 1; 1317 priv->old_link = phydev->link; 1318 } 1319 1320 if (priv->old_duplex != phydev->duplex) { 1321 changed = 1; 1322 priv->old_duplex = phydev->duplex; 1323 } 1324 1325 if (priv->is_lite) 1326 goto out; 1327 1328 switch (phydev->speed) { 1329 case SPEED_2500: 1330 cmd_bits = CMD_SPEED_2500; 1331 break; 1332 case SPEED_1000: 1333 cmd_bits = CMD_SPEED_1000; 1334 break; 1335 case SPEED_100: 1336 cmd_bits = CMD_SPEED_100; 1337 break; 1338 case SPEED_10: 1339 cmd_bits = CMD_SPEED_10; 1340 break; 1341 default: 1342 break; 1343 } 1344 cmd_bits <<= CMD_SPEED_SHIFT; 1345 1346 if (phydev->duplex == DUPLEX_HALF) 1347 cmd_bits |= CMD_HD_EN; 1348 1349 if (priv->old_pause != phydev->pause) { 1350 changed = 1; 1351 priv->old_pause = phydev->pause; 1352 } 1353 1354 if (!phydev->pause) 1355 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE; 1356 1357 if (!changed) 1358 return; 1359 1360 if (phydev->link) { 1361 reg = umac_readl(priv, UMAC_CMD); 1362 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) | 1363 CMD_HD_EN | CMD_RX_PAUSE_IGNORE | 1364 CMD_TX_PAUSE_IGNORE); 1365 reg |= cmd_bits; 1366 umac_writel(priv, reg, UMAC_CMD); 1367 } 1368 out: 1369 if (changed) 1370 phy_print_status(phydev); 1371 } 1372 1373 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv, 1374 unsigned int index) 1375 { 1376 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index]; 1377 struct device *kdev = &priv->pdev->dev; 1378 size_t size; 1379 void *p; 1380 u32 reg; 1381 1382 /* Simple descriptors partitioning for now */ 1383 size = 256; 1384 1385 /* We just need one DMA descriptor which is DMA-able, since writing to 1386 * the port will allocate a new descriptor in its internal linked-list 1387 */ 1388 p = dma_zalloc_coherent(kdev, sizeof(struct dma_desc), &ring->desc_dma, 1389 GFP_KERNEL); 1390 if (!p) { 1391 netif_err(priv, hw, priv->netdev, "DMA alloc failed\n"); 1392 return -ENOMEM; 1393 } 1394 1395 ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL); 1396 if (!ring->cbs) { 1397 dma_free_coherent(kdev, sizeof(struct dma_desc), 1398 ring->desc_cpu, ring->desc_dma); 1399 netif_err(priv, hw, priv->netdev, "CB allocation failed\n"); 1400 return -ENOMEM; 1401 } 1402 1403 /* Initialize SW view of the ring */ 1404 spin_lock_init(&ring->lock); 1405 ring->priv = priv; 1406 netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64); 1407 ring->index = index; 1408 ring->size = size; 1409 ring->alloc_size = ring->size; 1410 ring->desc_cpu = p; 1411 ring->desc_count = ring->size; 1412 ring->curr_desc = 0; 1413 1414 /* Initialize HW ring */ 1415 tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index)); 1416 tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index)); 1417 tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index)); 1418 tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index)); 1419 1420 /* Configure QID and port mapping */ 1421 reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index)); 1422 reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT); 1423 reg |= ring->switch_queue & RING_QID_MASK; 1424 reg |= ring->switch_port << RING_PORT_ID_SHIFT; 1425 tdma_writel(priv, reg, TDMA_DESC_RING_MAPPING(index)); 1426 tdma_writel(priv, 0, TDMA_DESC_RING_PCP_DEI_VID(index)); 1427 1428 /* Enable ACB algorithm 2 */ 1429 reg = tdma_readl(priv, TDMA_CONTROL); 1430 reg |= tdma_control_bit(priv, ACB_ALGO); 1431 tdma_writel(priv, reg, TDMA_CONTROL); 1432 1433 /* Do not use tdma_control_bit() here because TSB_SWAP1 collides 1434 * with the original definition of ACB_ALGO 1435 */ 1436 reg = tdma_readl(priv, TDMA_CONTROL); 1437 if (priv->is_lite) 1438 reg &= ~BIT(TSB_SWAP1); 1439 /* Set a correct TSB format based on host endian */ 1440 if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)) 1441 reg |= tdma_control_bit(priv, TSB_SWAP0); 1442 else 1443 reg &= ~tdma_control_bit(priv, TSB_SWAP0); 1444 tdma_writel(priv, reg, TDMA_CONTROL); 1445 1446 /* Program the number of descriptors as MAX_THRESHOLD and half of 1447 * its size for the hysteresis trigger 1448 */ 1449 tdma_writel(priv, ring->size | 1450 1 << RING_HYST_THRESH_SHIFT, 1451 TDMA_DESC_RING_MAX_HYST(index)); 1452 1453 /* Enable the ring queue in the arbiter */ 1454 reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN); 1455 reg |= (1 << index); 1456 tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN); 1457 1458 napi_enable(&ring->napi); 1459 1460 netif_dbg(priv, hw, priv->netdev, 1461 "TDMA cfg, size=%d, desc_cpu=%p switch q=%d,port=%d\n", 1462 ring->size, ring->desc_cpu, ring->switch_queue, 1463 ring->switch_port); 1464 1465 return 0; 1466 } 1467 1468 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv, 1469 unsigned int index) 1470 { 1471 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index]; 1472 struct device *kdev = &priv->pdev->dev; 1473 u32 reg; 1474 1475 /* Caller should stop the TDMA engine */ 1476 reg = tdma_readl(priv, TDMA_STATUS); 1477 if (!(reg & TDMA_DISABLED)) 1478 netdev_warn(priv->netdev, "TDMA not stopped!\n"); 1479 1480 /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could 1481 * fail, so by checking this pointer we know whether the TX ring was 1482 * fully initialized or not. 1483 */ 1484 if (!ring->cbs) 1485 return; 1486 1487 napi_disable(&ring->napi); 1488 netif_napi_del(&ring->napi); 1489 1490 bcm_sysport_tx_clean(priv, ring); 1491 1492 kfree(ring->cbs); 1493 ring->cbs = NULL; 1494 1495 if (ring->desc_dma) { 1496 dma_free_coherent(kdev, sizeof(struct dma_desc), 1497 ring->desc_cpu, ring->desc_dma); 1498 ring->desc_dma = 0; 1499 } 1500 ring->size = 0; 1501 ring->alloc_size = 0; 1502 1503 netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n"); 1504 } 1505 1506 /* RDMA helper */ 1507 static inline int rdma_enable_set(struct bcm_sysport_priv *priv, 1508 unsigned int enable) 1509 { 1510 unsigned int timeout = 1000; 1511 u32 reg; 1512 1513 reg = rdma_readl(priv, RDMA_CONTROL); 1514 if (enable) 1515 reg |= RDMA_EN; 1516 else 1517 reg &= ~RDMA_EN; 1518 rdma_writel(priv, reg, RDMA_CONTROL); 1519 1520 /* Poll for RMDA disabling completion */ 1521 do { 1522 reg = rdma_readl(priv, RDMA_STATUS); 1523 if (!!(reg & RDMA_DISABLED) == !enable) 1524 return 0; 1525 usleep_range(1000, 2000); 1526 } while (timeout-- > 0); 1527 1528 netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n"); 1529 1530 return -ETIMEDOUT; 1531 } 1532 1533 /* TDMA helper */ 1534 static inline int tdma_enable_set(struct bcm_sysport_priv *priv, 1535 unsigned int enable) 1536 { 1537 unsigned int timeout = 1000; 1538 u32 reg; 1539 1540 reg = tdma_readl(priv, TDMA_CONTROL); 1541 if (enable) 1542 reg |= tdma_control_bit(priv, TDMA_EN); 1543 else 1544 reg &= ~tdma_control_bit(priv, TDMA_EN); 1545 tdma_writel(priv, reg, TDMA_CONTROL); 1546 1547 /* Poll for TMDA disabling completion */ 1548 do { 1549 reg = tdma_readl(priv, TDMA_STATUS); 1550 if (!!(reg & TDMA_DISABLED) == !enable) 1551 return 0; 1552 1553 usleep_range(1000, 2000); 1554 } while (timeout-- > 0); 1555 1556 netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n"); 1557 1558 return -ETIMEDOUT; 1559 } 1560 1561 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv) 1562 { 1563 struct bcm_sysport_cb *cb; 1564 u32 reg; 1565 int ret; 1566 int i; 1567 1568 /* Initialize SW view of the RX ring */ 1569 priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC; 1570 priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET; 1571 priv->rx_c_index = 0; 1572 priv->rx_read_ptr = 0; 1573 priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb), 1574 GFP_KERNEL); 1575 if (!priv->rx_cbs) { 1576 netif_err(priv, hw, priv->netdev, "CB allocation failed\n"); 1577 return -ENOMEM; 1578 } 1579 1580 for (i = 0; i < priv->num_rx_bds; i++) { 1581 cb = priv->rx_cbs + i; 1582 cb->bd_addr = priv->rx_bds + i * DESC_SIZE; 1583 } 1584 1585 ret = bcm_sysport_alloc_rx_bufs(priv); 1586 if (ret) { 1587 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n"); 1588 return ret; 1589 } 1590 1591 /* Initialize HW, ensure RDMA is disabled */ 1592 reg = rdma_readl(priv, RDMA_STATUS); 1593 if (!(reg & RDMA_DISABLED)) 1594 rdma_enable_set(priv, 0); 1595 1596 rdma_writel(priv, 0, RDMA_WRITE_PTR_LO); 1597 rdma_writel(priv, 0, RDMA_WRITE_PTR_HI); 1598 rdma_writel(priv, 0, RDMA_PROD_INDEX); 1599 rdma_writel(priv, 0, RDMA_CONS_INDEX); 1600 rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT | 1601 RX_BUF_LENGTH, RDMA_RING_BUF_SIZE); 1602 /* Operate the queue in ring mode */ 1603 rdma_writel(priv, 0, RDMA_START_ADDR_HI); 1604 rdma_writel(priv, 0, RDMA_START_ADDR_LO); 1605 rdma_writel(priv, 0, RDMA_END_ADDR_HI); 1606 rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO); 1607 1608 rdma_writel(priv, 1, RDMA_MBDONE_INTR); 1609 1610 netif_dbg(priv, hw, priv->netdev, 1611 "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n", 1612 priv->num_rx_bds, priv->rx_bds); 1613 1614 return 0; 1615 } 1616 1617 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv) 1618 { 1619 struct bcm_sysport_cb *cb; 1620 unsigned int i; 1621 u32 reg; 1622 1623 /* Caller should ensure RDMA is disabled */ 1624 reg = rdma_readl(priv, RDMA_STATUS); 1625 if (!(reg & RDMA_DISABLED)) 1626 netdev_warn(priv->netdev, "RDMA not stopped!\n"); 1627 1628 for (i = 0; i < priv->num_rx_bds; i++) { 1629 cb = &priv->rx_cbs[i]; 1630 if (dma_unmap_addr(cb, dma_addr)) 1631 dma_unmap_single(&priv->pdev->dev, 1632 dma_unmap_addr(cb, dma_addr), 1633 RX_BUF_LENGTH, DMA_FROM_DEVICE); 1634 bcm_sysport_free_cb(cb); 1635 } 1636 1637 kfree(priv->rx_cbs); 1638 priv->rx_cbs = NULL; 1639 1640 netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n"); 1641 } 1642 1643 static void bcm_sysport_set_rx_mode(struct net_device *dev) 1644 { 1645 struct bcm_sysport_priv *priv = netdev_priv(dev); 1646 u32 reg; 1647 1648 if (priv->is_lite) 1649 return; 1650 1651 reg = umac_readl(priv, UMAC_CMD); 1652 if (dev->flags & IFF_PROMISC) 1653 reg |= CMD_PROMISC; 1654 else 1655 reg &= ~CMD_PROMISC; 1656 umac_writel(priv, reg, UMAC_CMD); 1657 1658 /* No support for ALLMULTI */ 1659 if (dev->flags & IFF_ALLMULTI) 1660 return; 1661 } 1662 1663 static inline void umac_enable_set(struct bcm_sysport_priv *priv, 1664 u32 mask, unsigned int enable) 1665 { 1666 u32 reg; 1667 1668 if (!priv->is_lite) { 1669 reg = umac_readl(priv, UMAC_CMD); 1670 if (enable) 1671 reg |= mask; 1672 else 1673 reg &= ~mask; 1674 umac_writel(priv, reg, UMAC_CMD); 1675 } else { 1676 reg = gib_readl(priv, GIB_CONTROL); 1677 if (enable) 1678 reg |= mask; 1679 else 1680 reg &= ~mask; 1681 gib_writel(priv, reg, GIB_CONTROL); 1682 } 1683 1684 /* UniMAC stops on a packet boundary, wait for a full-sized packet 1685 * to be processed (1 msec). 1686 */ 1687 if (enable == 0) 1688 usleep_range(1000, 2000); 1689 } 1690 1691 static inline void umac_reset(struct bcm_sysport_priv *priv) 1692 { 1693 u32 reg; 1694 1695 if (priv->is_lite) 1696 return; 1697 1698 reg = umac_readl(priv, UMAC_CMD); 1699 reg |= CMD_SW_RESET; 1700 umac_writel(priv, reg, UMAC_CMD); 1701 udelay(10); 1702 reg = umac_readl(priv, UMAC_CMD); 1703 reg &= ~CMD_SW_RESET; 1704 umac_writel(priv, reg, UMAC_CMD); 1705 } 1706 1707 static void umac_set_hw_addr(struct bcm_sysport_priv *priv, 1708 unsigned char *addr) 1709 { 1710 u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | 1711 addr[3]; 1712 u32 mac1 = (addr[4] << 8) | addr[5]; 1713 1714 if (!priv->is_lite) { 1715 umac_writel(priv, mac0, UMAC_MAC0); 1716 umac_writel(priv, mac1, UMAC_MAC1); 1717 } else { 1718 gib_writel(priv, mac0, GIB_MAC0); 1719 gib_writel(priv, mac1, GIB_MAC1); 1720 } 1721 } 1722 1723 static void topctrl_flush(struct bcm_sysport_priv *priv) 1724 { 1725 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL); 1726 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL); 1727 mdelay(1); 1728 topctrl_writel(priv, 0, RX_FLUSH_CNTL); 1729 topctrl_writel(priv, 0, TX_FLUSH_CNTL); 1730 } 1731 1732 static int bcm_sysport_change_mac(struct net_device *dev, void *p) 1733 { 1734 struct bcm_sysport_priv *priv = netdev_priv(dev); 1735 struct sockaddr *addr = p; 1736 1737 if (!is_valid_ether_addr(addr->sa_data)) 1738 return -EINVAL; 1739 1740 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); 1741 1742 /* interface is disabled, changes to MAC will be reflected on next 1743 * open call 1744 */ 1745 if (!netif_running(dev)) 1746 return 0; 1747 1748 umac_set_hw_addr(priv, dev->dev_addr); 1749 1750 return 0; 1751 } 1752 1753 static void bcm_sysport_get_stats64(struct net_device *dev, 1754 struct rtnl_link_stats64 *stats) 1755 { 1756 struct bcm_sysport_priv *priv = netdev_priv(dev); 1757 struct bcm_sysport_stats64 *stats64 = &priv->stats64; 1758 unsigned int start; 1759 1760 netdev_stats_to_stats64(stats, &dev->stats); 1761 1762 bcm_sysport_update_tx_stats(priv, &stats->tx_bytes, 1763 &stats->tx_packets); 1764 1765 do { 1766 start = u64_stats_fetch_begin_irq(&priv->syncp); 1767 stats->rx_packets = stats64->rx_packets; 1768 stats->rx_bytes = stats64->rx_bytes; 1769 } while (u64_stats_fetch_retry_irq(&priv->syncp, start)); 1770 } 1771 1772 static void bcm_sysport_netif_start(struct net_device *dev) 1773 { 1774 struct bcm_sysport_priv *priv = netdev_priv(dev); 1775 1776 /* Enable NAPI */ 1777 napi_enable(&priv->napi); 1778 1779 /* Enable RX interrupt and TX ring full interrupt */ 1780 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL); 1781 1782 phy_start(dev->phydev); 1783 1784 /* Enable TX interrupts for the TXQs */ 1785 if (!priv->is_lite) 1786 intrl2_1_mask_clear(priv, 0xffffffff); 1787 else 1788 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK); 1789 1790 /* Last call before we start the real business */ 1791 netif_tx_start_all_queues(dev); 1792 } 1793 1794 static void rbuf_init(struct bcm_sysport_priv *priv) 1795 { 1796 u32 reg; 1797 1798 reg = rbuf_readl(priv, RBUF_CONTROL); 1799 reg |= RBUF_4B_ALGN | RBUF_RSB_EN; 1800 /* Set a correct RSB format on SYSTEMPORT Lite */ 1801 if (priv->is_lite) 1802 reg &= ~RBUF_RSB_SWAP1; 1803 1804 /* Set a correct RSB format based on host endian */ 1805 if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)) 1806 reg |= RBUF_RSB_SWAP0; 1807 else 1808 reg &= ~RBUF_RSB_SWAP0; 1809 rbuf_writel(priv, reg, RBUF_CONTROL); 1810 } 1811 1812 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv) 1813 { 1814 intrl2_0_mask_set(priv, 0xffffffff); 1815 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); 1816 if (!priv->is_lite) { 1817 intrl2_1_mask_set(priv, 0xffffffff); 1818 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); 1819 } 1820 } 1821 1822 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv) 1823 { 1824 u32 __maybe_unused reg; 1825 1826 /* Include Broadcom tag in pad extension */ 1827 if (netdev_uses_dsa(priv->netdev)) { 1828 reg = gib_readl(priv, GIB_CONTROL); 1829 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT); 1830 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT; 1831 gib_writel(priv, reg, GIB_CONTROL); 1832 } 1833 } 1834 1835 static int bcm_sysport_open(struct net_device *dev) 1836 { 1837 struct bcm_sysport_priv *priv = netdev_priv(dev); 1838 struct phy_device *phydev; 1839 unsigned int i; 1840 int ret; 1841 1842 /* Reset UniMAC */ 1843 umac_reset(priv); 1844 1845 /* Flush TX and RX FIFOs at TOPCTRL level */ 1846 topctrl_flush(priv); 1847 1848 /* Disable the UniMAC RX/TX */ 1849 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0); 1850 1851 /* Enable RBUF 2bytes alignment and Receive Status Block */ 1852 rbuf_init(priv); 1853 1854 /* Set maximum frame length */ 1855 if (!priv->is_lite) 1856 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN); 1857 else 1858 gib_set_pad_extension(priv); 1859 1860 /* Set MAC address */ 1861 umac_set_hw_addr(priv, dev->dev_addr); 1862 1863 /* Read CRC forward */ 1864 if (!priv->is_lite) 1865 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD); 1866 else 1867 priv->crc_fwd = !!(gib_readl(priv, GIB_CONTROL) & 1868 GIB_FCS_STRIP); 1869 1870 phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link, 1871 0, priv->phy_interface); 1872 if (!phydev) { 1873 netdev_err(dev, "could not attach to PHY\n"); 1874 return -ENODEV; 1875 } 1876 1877 /* Reset house keeping link status */ 1878 priv->old_duplex = -1; 1879 priv->old_link = -1; 1880 priv->old_pause = -1; 1881 1882 /* mask all interrupts and request them */ 1883 bcm_sysport_mask_all_intrs(priv); 1884 1885 ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev); 1886 if (ret) { 1887 netdev_err(dev, "failed to request RX interrupt\n"); 1888 goto out_phy_disconnect; 1889 } 1890 1891 if (!priv->is_lite) { 1892 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0, 1893 dev->name, dev); 1894 if (ret) { 1895 netdev_err(dev, "failed to request TX interrupt\n"); 1896 goto out_free_irq0; 1897 } 1898 } 1899 1900 /* Initialize both hardware and software ring */ 1901 for (i = 0; i < dev->num_tx_queues; i++) { 1902 ret = bcm_sysport_init_tx_ring(priv, i); 1903 if (ret) { 1904 netdev_err(dev, "failed to initialize TX ring %d\n", 1905 i); 1906 goto out_free_tx_ring; 1907 } 1908 } 1909 1910 /* Initialize linked-list */ 1911 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS); 1912 1913 /* Initialize RX ring */ 1914 ret = bcm_sysport_init_rx_ring(priv); 1915 if (ret) { 1916 netdev_err(dev, "failed to initialize RX ring\n"); 1917 goto out_free_rx_ring; 1918 } 1919 1920 /* Turn on RDMA */ 1921 ret = rdma_enable_set(priv, 1); 1922 if (ret) 1923 goto out_free_rx_ring; 1924 1925 /* Turn on TDMA */ 1926 ret = tdma_enable_set(priv, 1); 1927 if (ret) 1928 goto out_clear_rx_int; 1929 1930 /* Turn on UniMAC TX/RX */ 1931 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1); 1932 1933 bcm_sysport_netif_start(dev); 1934 1935 return 0; 1936 1937 out_clear_rx_int: 1938 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL); 1939 out_free_rx_ring: 1940 bcm_sysport_fini_rx_ring(priv); 1941 out_free_tx_ring: 1942 for (i = 0; i < dev->num_tx_queues; i++) 1943 bcm_sysport_fini_tx_ring(priv, i); 1944 if (!priv->is_lite) 1945 free_irq(priv->irq1, dev); 1946 out_free_irq0: 1947 free_irq(priv->irq0, dev); 1948 out_phy_disconnect: 1949 phy_disconnect(phydev); 1950 return ret; 1951 } 1952 1953 static void bcm_sysport_netif_stop(struct net_device *dev) 1954 { 1955 struct bcm_sysport_priv *priv = netdev_priv(dev); 1956 1957 /* stop all software from updating hardware */ 1958 netif_tx_stop_all_queues(dev); 1959 napi_disable(&priv->napi); 1960 phy_stop(dev->phydev); 1961 1962 /* mask all interrupts */ 1963 bcm_sysport_mask_all_intrs(priv); 1964 } 1965 1966 static int bcm_sysport_stop(struct net_device *dev) 1967 { 1968 struct bcm_sysport_priv *priv = netdev_priv(dev); 1969 unsigned int i; 1970 int ret; 1971 1972 bcm_sysport_netif_stop(dev); 1973 1974 /* Disable UniMAC RX */ 1975 umac_enable_set(priv, CMD_RX_EN, 0); 1976 1977 ret = tdma_enable_set(priv, 0); 1978 if (ret) { 1979 netdev_err(dev, "timeout disabling RDMA\n"); 1980 return ret; 1981 } 1982 1983 /* Wait for a maximum packet size to be drained */ 1984 usleep_range(2000, 3000); 1985 1986 ret = rdma_enable_set(priv, 0); 1987 if (ret) { 1988 netdev_err(dev, "timeout disabling TDMA\n"); 1989 return ret; 1990 } 1991 1992 /* Disable UniMAC TX */ 1993 umac_enable_set(priv, CMD_TX_EN, 0); 1994 1995 /* Free RX/TX rings SW structures */ 1996 for (i = 0; i < dev->num_tx_queues; i++) 1997 bcm_sysport_fini_tx_ring(priv, i); 1998 bcm_sysport_fini_rx_ring(priv); 1999 2000 free_irq(priv->irq0, dev); 2001 if (!priv->is_lite) 2002 free_irq(priv->irq1, dev); 2003 2004 /* Disconnect from PHY */ 2005 phy_disconnect(dev->phydev); 2006 2007 return 0; 2008 } 2009 2010 static const struct ethtool_ops bcm_sysport_ethtool_ops = { 2011 .get_drvinfo = bcm_sysport_get_drvinfo, 2012 .get_msglevel = bcm_sysport_get_msglvl, 2013 .set_msglevel = bcm_sysport_set_msglvl, 2014 .get_link = ethtool_op_get_link, 2015 .get_strings = bcm_sysport_get_strings, 2016 .get_ethtool_stats = bcm_sysport_get_stats, 2017 .get_sset_count = bcm_sysport_get_sset_count, 2018 .get_wol = bcm_sysport_get_wol, 2019 .set_wol = bcm_sysport_set_wol, 2020 .get_coalesce = bcm_sysport_get_coalesce, 2021 .set_coalesce = bcm_sysport_set_coalesce, 2022 .get_link_ksettings = phy_ethtool_get_link_ksettings, 2023 .set_link_ksettings = phy_ethtool_set_link_ksettings, 2024 }; 2025 2026 static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb, 2027 void *accel_priv, 2028 select_queue_fallback_t fallback) 2029 { 2030 struct bcm_sysport_priv *priv = netdev_priv(dev); 2031 u16 queue = skb_get_queue_mapping(skb); 2032 struct bcm_sysport_tx_ring *tx_ring; 2033 unsigned int q, port; 2034 2035 if (!netdev_uses_dsa(dev)) 2036 return fallback(dev, skb); 2037 2038 /* DSA tagging layer will have configured the correct queue */ 2039 q = BRCM_TAG_GET_QUEUE(queue); 2040 port = BRCM_TAG_GET_PORT(queue); 2041 tx_ring = priv->ring_map[q + port * priv->per_port_num_tx_queues]; 2042 2043 return tx_ring->index; 2044 } 2045 2046 static int bcm_sysport_map_queues(struct net_device *dev, 2047 struct dsa_notifier_register_info *info) 2048 { 2049 struct bcm_sysport_priv *priv = netdev_priv(dev); 2050 struct bcm_sysport_tx_ring *ring; 2051 struct net_device *slave_dev; 2052 unsigned int num_tx_queues; 2053 unsigned int q, start, port; 2054 2055 /* We can't be setting up queue inspection for non directly attached 2056 * switches 2057 */ 2058 if (info->switch_number) 2059 return 0; 2060 2061 port = info->port_number; 2062 slave_dev = info->info.dev; 2063 2064 /* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a 2065 * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of 2066 * per-port (slave_dev) network devices queue, we achieve just that. 2067 * This need to happen now before any slave network device is used such 2068 * it accurately reflects the number of real TX queues. 2069 */ 2070 if (priv->is_lite) 2071 netif_set_real_num_tx_queues(slave_dev, 2072 slave_dev->num_tx_queues / 2); 2073 num_tx_queues = slave_dev->real_num_tx_queues; 2074 2075 if (priv->per_port_num_tx_queues && 2076 priv->per_port_num_tx_queues != num_tx_queues) 2077 netdev_warn(slave_dev, "asymetric number of per-port queues\n"); 2078 2079 priv->per_port_num_tx_queues = num_tx_queues; 2080 2081 start = find_first_zero_bit(&priv->queue_bitmap, dev->num_tx_queues); 2082 for (q = 0; q < num_tx_queues; q++) { 2083 ring = &priv->tx_rings[q + start]; 2084 2085 /* Just remember the mapping actual programming done 2086 * during bcm_sysport_init_tx_ring 2087 */ 2088 ring->switch_queue = q; 2089 ring->switch_port = port; 2090 priv->ring_map[q + port * num_tx_queues] = ring; 2091 2092 /* Set all queues as being used now */ 2093 set_bit(q + start, &priv->queue_bitmap); 2094 } 2095 2096 return 0; 2097 } 2098 2099 static int bcm_sysport_dsa_notifier(struct notifier_block *unused, 2100 unsigned long event, void *ptr) 2101 { 2102 struct dsa_notifier_register_info *info; 2103 2104 if (event != DSA_PORT_REGISTER) 2105 return NOTIFY_DONE; 2106 2107 info = ptr; 2108 2109 return notifier_from_errno(bcm_sysport_map_queues(info->master, info)); 2110 } 2111 2112 static const struct net_device_ops bcm_sysport_netdev_ops = { 2113 .ndo_start_xmit = bcm_sysport_xmit, 2114 .ndo_tx_timeout = bcm_sysport_tx_timeout, 2115 .ndo_open = bcm_sysport_open, 2116 .ndo_stop = bcm_sysport_stop, 2117 .ndo_set_features = bcm_sysport_set_features, 2118 .ndo_set_rx_mode = bcm_sysport_set_rx_mode, 2119 .ndo_set_mac_address = bcm_sysport_change_mac, 2120 #ifdef CONFIG_NET_POLL_CONTROLLER 2121 .ndo_poll_controller = bcm_sysport_poll_controller, 2122 #endif 2123 .ndo_get_stats64 = bcm_sysport_get_stats64, 2124 .ndo_select_queue = bcm_sysport_select_queue, 2125 }; 2126 2127 #define REV_FMT "v%2x.%02x" 2128 2129 static const struct bcm_sysport_hw_params bcm_sysport_params[] = { 2130 [SYSTEMPORT] = { 2131 .is_lite = false, 2132 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS, 2133 }, 2134 [SYSTEMPORT_LITE] = { 2135 .is_lite = true, 2136 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS, 2137 }, 2138 }; 2139 2140 static const struct of_device_id bcm_sysport_of_match[] = { 2141 { .compatible = "brcm,systemportlite-v1.00", 2142 .data = &bcm_sysport_params[SYSTEMPORT_LITE] }, 2143 { .compatible = "brcm,systemport-v1.00", 2144 .data = &bcm_sysport_params[SYSTEMPORT] }, 2145 { .compatible = "brcm,systemport", 2146 .data = &bcm_sysport_params[SYSTEMPORT] }, 2147 { /* sentinel */ } 2148 }; 2149 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match); 2150 2151 static int bcm_sysport_probe(struct platform_device *pdev) 2152 { 2153 const struct bcm_sysport_hw_params *params; 2154 const struct of_device_id *of_id = NULL; 2155 struct bcm_sysport_priv *priv; 2156 struct device_node *dn; 2157 struct net_device *dev; 2158 const void *macaddr; 2159 struct resource *r; 2160 u32 txq, rxq; 2161 int ret; 2162 2163 dn = pdev->dev.of_node; 2164 r = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2165 of_id = of_match_node(bcm_sysport_of_match, dn); 2166 if (!of_id || !of_id->data) 2167 return -EINVAL; 2168 2169 /* Fairly quickly we need to know the type of adapter we have */ 2170 params = of_id->data; 2171 2172 /* Read the Transmit/Receive Queue properties */ 2173 if (of_property_read_u32(dn, "systemport,num-txq", &txq)) 2174 txq = TDMA_NUM_RINGS; 2175 if (of_property_read_u32(dn, "systemport,num-rxq", &rxq)) 2176 rxq = 1; 2177 2178 /* Sanity check the number of transmit queues */ 2179 if (!txq || txq > TDMA_NUM_RINGS) 2180 return -EINVAL; 2181 2182 dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq); 2183 if (!dev) 2184 return -ENOMEM; 2185 2186 /* Initialize private members */ 2187 priv = netdev_priv(dev); 2188 2189 /* Allocate number of TX rings */ 2190 priv->tx_rings = devm_kcalloc(&pdev->dev, txq, 2191 sizeof(struct bcm_sysport_tx_ring), 2192 GFP_KERNEL); 2193 if (!priv->tx_rings) 2194 return -ENOMEM; 2195 2196 priv->is_lite = params->is_lite; 2197 priv->num_rx_desc_words = params->num_rx_desc_words; 2198 2199 priv->irq0 = platform_get_irq(pdev, 0); 2200 if (!priv->is_lite) { 2201 priv->irq1 = platform_get_irq(pdev, 1); 2202 priv->wol_irq = platform_get_irq(pdev, 2); 2203 } else { 2204 priv->wol_irq = platform_get_irq(pdev, 1); 2205 } 2206 if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) { 2207 dev_err(&pdev->dev, "invalid interrupts\n"); 2208 ret = -EINVAL; 2209 goto err_free_netdev; 2210 } 2211 2212 priv->base = devm_ioremap_resource(&pdev->dev, r); 2213 if (IS_ERR(priv->base)) { 2214 ret = PTR_ERR(priv->base); 2215 goto err_free_netdev; 2216 } 2217 2218 priv->netdev = dev; 2219 priv->pdev = pdev; 2220 2221 priv->phy_interface = of_get_phy_mode(dn); 2222 /* Default to GMII interface mode */ 2223 if (priv->phy_interface < 0) 2224 priv->phy_interface = PHY_INTERFACE_MODE_GMII; 2225 2226 /* In the case of a fixed PHY, the DT node associated 2227 * to the PHY is the Ethernet MAC DT node. 2228 */ 2229 if (of_phy_is_fixed_link(dn)) { 2230 ret = of_phy_register_fixed_link(dn); 2231 if (ret) { 2232 dev_err(&pdev->dev, "failed to register fixed PHY\n"); 2233 goto err_free_netdev; 2234 } 2235 2236 priv->phy_dn = dn; 2237 } 2238 2239 /* Initialize netdevice members */ 2240 macaddr = of_get_mac_address(dn); 2241 if (!macaddr || !is_valid_ether_addr(macaddr)) { 2242 dev_warn(&pdev->dev, "using random Ethernet MAC\n"); 2243 eth_hw_addr_random(dev); 2244 } else { 2245 ether_addr_copy(dev->dev_addr, macaddr); 2246 } 2247 2248 SET_NETDEV_DEV(dev, &pdev->dev); 2249 dev_set_drvdata(&pdev->dev, dev); 2250 dev->ethtool_ops = &bcm_sysport_ethtool_ops; 2251 dev->netdev_ops = &bcm_sysport_netdev_ops; 2252 netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64); 2253 2254 /* HW supported features, none enabled by default */ 2255 dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA | 2256 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 2257 2258 /* Request the WOL interrupt and advertise suspend if available */ 2259 priv->wol_irq_disabled = 1; 2260 ret = devm_request_irq(&pdev->dev, priv->wol_irq, 2261 bcm_sysport_wol_isr, 0, dev->name, priv); 2262 if (!ret) 2263 device_set_wakeup_capable(&pdev->dev, 1); 2264 2265 /* Set the needed headroom once and for all */ 2266 BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8); 2267 dev->needed_headroom += sizeof(struct bcm_tsb); 2268 2269 /* libphy will adjust the link state accordingly */ 2270 netif_carrier_off(dev); 2271 2272 u64_stats_init(&priv->syncp); 2273 2274 priv->dsa_notifier.notifier_call = bcm_sysport_dsa_notifier; 2275 2276 ret = register_dsa_notifier(&priv->dsa_notifier); 2277 if (ret) { 2278 dev_err(&pdev->dev, "failed to register DSA notifier\n"); 2279 goto err_deregister_fixed_link; 2280 } 2281 2282 ret = register_netdev(dev); 2283 if (ret) { 2284 dev_err(&pdev->dev, "failed to register net_device\n"); 2285 goto err_deregister_notifier; 2286 } 2287 2288 priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK; 2289 dev_info(&pdev->dev, 2290 "Broadcom SYSTEMPORT%s" REV_FMT 2291 " at 0x%p (irqs: %d, %d, TXQs: %d, RXQs: %d)\n", 2292 priv->is_lite ? " Lite" : "", 2293 (priv->rev >> 8) & 0xff, priv->rev & 0xff, 2294 priv->base, priv->irq0, priv->irq1, txq, rxq); 2295 2296 return 0; 2297 2298 err_deregister_notifier: 2299 unregister_dsa_notifier(&priv->dsa_notifier); 2300 err_deregister_fixed_link: 2301 if (of_phy_is_fixed_link(dn)) 2302 of_phy_deregister_fixed_link(dn); 2303 err_free_netdev: 2304 free_netdev(dev); 2305 return ret; 2306 } 2307 2308 static int bcm_sysport_remove(struct platform_device *pdev) 2309 { 2310 struct net_device *dev = dev_get_drvdata(&pdev->dev); 2311 struct bcm_sysport_priv *priv = netdev_priv(dev); 2312 struct device_node *dn = pdev->dev.of_node; 2313 2314 /* Not much to do, ndo_close has been called 2315 * and we use managed allocations 2316 */ 2317 unregister_dsa_notifier(&priv->dsa_notifier); 2318 unregister_netdev(dev); 2319 if (of_phy_is_fixed_link(dn)) 2320 of_phy_deregister_fixed_link(dn); 2321 free_netdev(dev); 2322 dev_set_drvdata(&pdev->dev, NULL); 2323 2324 return 0; 2325 } 2326 2327 #ifdef CONFIG_PM_SLEEP 2328 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv) 2329 { 2330 struct net_device *ndev = priv->netdev; 2331 unsigned int timeout = 1000; 2332 u32 reg; 2333 2334 /* Password has already been programmed */ 2335 reg = umac_readl(priv, UMAC_MPD_CTRL); 2336 reg |= MPD_EN; 2337 reg &= ~PSW_EN; 2338 if (priv->wolopts & WAKE_MAGICSECURE) 2339 reg |= PSW_EN; 2340 umac_writel(priv, reg, UMAC_MPD_CTRL); 2341 2342 /* Make sure RBUF entered WoL mode as result */ 2343 do { 2344 reg = rbuf_readl(priv, RBUF_STATUS); 2345 if (reg & RBUF_WOL_MODE) 2346 break; 2347 2348 udelay(10); 2349 } while (timeout-- > 0); 2350 2351 /* Do not leave the UniMAC RBUF matching only MPD packets */ 2352 if (!timeout) { 2353 reg = umac_readl(priv, UMAC_MPD_CTRL); 2354 reg &= ~MPD_EN; 2355 umac_writel(priv, reg, UMAC_MPD_CTRL); 2356 netif_err(priv, wol, ndev, "failed to enter WOL mode\n"); 2357 return -ETIMEDOUT; 2358 } 2359 2360 /* UniMAC receive needs to be turned on */ 2361 umac_enable_set(priv, CMD_RX_EN, 1); 2362 2363 /* Enable the interrupt wake-up source */ 2364 intrl2_0_mask_clear(priv, INTRL2_0_MPD); 2365 2366 netif_dbg(priv, wol, ndev, "entered WOL mode\n"); 2367 2368 return 0; 2369 } 2370 2371 static int bcm_sysport_suspend(struct device *d) 2372 { 2373 struct net_device *dev = dev_get_drvdata(d); 2374 struct bcm_sysport_priv *priv = netdev_priv(dev); 2375 unsigned int i; 2376 int ret = 0; 2377 u32 reg; 2378 2379 if (!netif_running(dev)) 2380 return 0; 2381 2382 bcm_sysport_netif_stop(dev); 2383 2384 phy_suspend(dev->phydev); 2385 2386 netif_device_detach(dev); 2387 2388 /* Disable UniMAC RX */ 2389 umac_enable_set(priv, CMD_RX_EN, 0); 2390 2391 ret = rdma_enable_set(priv, 0); 2392 if (ret) { 2393 netdev_err(dev, "RDMA timeout!\n"); 2394 return ret; 2395 } 2396 2397 /* Disable RXCHK if enabled */ 2398 if (priv->rx_chk_en) { 2399 reg = rxchk_readl(priv, RXCHK_CONTROL); 2400 reg &= ~RXCHK_EN; 2401 rxchk_writel(priv, reg, RXCHK_CONTROL); 2402 } 2403 2404 /* Flush RX pipe */ 2405 if (!priv->wolopts) 2406 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL); 2407 2408 ret = tdma_enable_set(priv, 0); 2409 if (ret) { 2410 netdev_err(dev, "TDMA timeout!\n"); 2411 return ret; 2412 } 2413 2414 /* Wait for a packet boundary */ 2415 usleep_range(2000, 3000); 2416 2417 umac_enable_set(priv, CMD_TX_EN, 0); 2418 2419 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL); 2420 2421 /* Free RX/TX rings SW structures */ 2422 for (i = 0; i < dev->num_tx_queues; i++) 2423 bcm_sysport_fini_tx_ring(priv, i); 2424 bcm_sysport_fini_rx_ring(priv); 2425 2426 /* Get prepared for Wake-on-LAN */ 2427 if (device_may_wakeup(d) && priv->wolopts) 2428 ret = bcm_sysport_suspend_to_wol(priv); 2429 2430 return ret; 2431 } 2432 2433 static int bcm_sysport_resume(struct device *d) 2434 { 2435 struct net_device *dev = dev_get_drvdata(d); 2436 struct bcm_sysport_priv *priv = netdev_priv(dev); 2437 unsigned int i; 2438 u32 reg; 2439 int ret; 2440 2441 if (!netif_running(dev)) 2442 return 0; 2443 2444 umac_reset(priv); 2445 2446 /* We may have been suspended and never received a WOL event that 2447 * would turn off MPD detection, take care of that now 2448 */ 2449 bcm_sysport_resume_from_wol(priv); 2450 2451 /* Initialize both hardware and software ring */ 2452 for (i = 0; i < dev->num_tx_queues; i++) { 2453 ret = bcm_sysport_init_tx_ring(priv, i); 2454 if (ret) { 2455 netdev_err(dev, "failed to initialize TX ring %d\n", 2456 i); 2457 goto out_free_tx_rings; 2458 } 2459 } 2460 2461 /* Initialize linked-list */ 2462 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS); 2463 2464 /* Initialize RX ring */ 2465 ret = bcm_sysport_init_rx_ring(priv); 2466 if (ret) { 2467 netdev_err(dev, "failed to initialize RX ring\n"); 2468 goto out_free_rx_ring; 2469 } 2470 2471 netif_device_attach(dev); 2472 2473 /* RX pipe enable */ 2474 topctrl_writel(priv, 0, RX_FLUSH_CNTL); 2475 2476 ret = rdma_enable_set(priv, 1); 2477 if (ret) { 2478 netdev_err(dev, "failed to enable RDMA\n"); 2479 goto out_free_rx_ring; 2480 } 2481 2482 /* Enable rxhck */ 2483 if (priv->rx_chk_en) { 2484 reg = rxchk_readl(priv, RXCHK_CONTROL); 2485 reg |= RXCHK_EN; 2486 rxchk_writel(priv, reg, RXCHK_CONTROL); 2487 } 2488 2489 rbuf_init(priv); 2490 2491 /* Set maximum frame length */ 2492 if (!priv->is_lite) 2493 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN); 2494 else 2495 gib_set_pad_extension(priv); 2496 2497 /* Set MAC address */ 2498 umac_set_hw_addr(priv, dev->dev_addr); 2499 2500 umac_enable_set(priv, CMD_RX_EN, 1); 2501 2502 /* TX pipe enable */ 2503 topctrl_writel(priv, 0, TX_FLUSH_CNTL); 2504 2505 umac_enable_set(priv, CMD_TX_EN, 1); 2506 2507 ret = tdma_enable_set(priv, 1); 2508 if (ret) { 2509 netdev_err(dev, "TDMA timeout!\n"); 2510 goto out_free_rx_ring; 2511 } 2512 2513 phy_resume(dev->phydev); 2514 2515 bcm_sysport_netif_start(dev); 2516 2517 return 0; 2518 2519 out_free_rx_ring: 2520 bcm_sysport_fini_rx_ring(priv); 2521 out_free_tx_rings: 2522 for (i = 0; i < dev->num_tx_queues; i++) 2523 bcm_sysport_fini_tx_ring(priv, i); 2524 return ret; 2525 } 2526 #endif 2527 2528 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops, 2529 bcm_sysport_suspend, bcm_sysport_resume); 2530 2531 static struct platform_driver bcm_sysport_driver = { 2532 .probe = bcm_sysport_probe, 2533 .remove = bcm_sysport_remove, 2534 .driver = { 2535 .name = "brcm-systemport", 2536 .of_match_table = bcm_sysport_of_match, 2537 .pm = &bcm_sysport_pm_ops, 2538 }, 2539 }; 2540 module_platform_driver(bcm_sysport_driver); 2541 2542 MODULE_AUTHOR("Broadcom Corporation"); 2543 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver"); 2544 MODULE_ALIAS("platform:brcm-systemport"); 2545 MODULE_LICENSE("GPL"); 2546