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