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->version, "0.1", sizeof(info->version)); 291 strlcpy(info->bus_info, "platform", sizeof(info->bus_info)); 292 } 293 294 static u32 bcm_sysport_get_msglvl(struct net_device *dev) 295 { 296 struct bcm_sysport_priv *priv = netdev_priv(dev); 297 298 return priv->msg_enable; 299 } 300 301 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable) 302 { 303 struct bcm_sysport_priv *priv = netdev_priv(dev); 304 305 priv->msg_enable = enable; 306 } 307 308 static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type) 309 { 310 switch (type) { 311 case BCM_SYSPORT_STAT_NETDEV: 312 case BCM_SYSPORT_STAT_NETDEV64: 313 case BCM_SYSPORT_STAT_RXCHK: 314 case BCM_SYSPORT_STAT_RBUF: 315 case BCM_SYSPORT_STAT_SOFT: 316 return true; 317 default: 318 return false; 319 } 320 } 321 322 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set) 323 { 324 struct bcm_sysport_priv *priv = netdev_priv(dev); 325 const struct bcm_sysport_stats *s; 326 unsigned int i, j; 327 328 switch (string_set) { 329 case ETH_SS_STATS: 330 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) { 331 s = &bcm_sysport_gstrings_stats[i]; 332 if (priv->is_lite && 333 !bcm_sysport_lite_stat_valid(s->type)) 334 continue; 335 j++; 336 } 337 /* Include per-queue statistics */ 338 return j + dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT; 339 default: 340 return -EOPNOTSUPP; 341 } 342 } 343 344 static void bcm_sysport_get_strings(struct net_device *dev, 345 u32 stringset, u8 *data) 346 { 347 struct bcm_sysport_priv *priv = netdev_priv(dev); 348 const struct bcm_sysport_stats *s; 349 char buf[128]; 350 int i, j; 351 352 switch (stringset) { 353 case ETH_SS_STATS: 354 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) { 355 s = &bcm_sysport_gstrings_stats[i]; 356 if (priv->is_lite && 357 !bcm_sysport_lite_stat_valid(s->type)) 358 continue; 359 360 memcpy(data + j * ETH_GSTRING_LEN, s->stat_string, 361 ETH_GSTRING_LEN); 362 j++; 363 } 364 365 for (i = 0; i < dev->num_tx_queues; i++) { 366 snprintf(buf, sizeof(buf), "txq%d_packets", i); 367 memcpy(data + j * ETH_GSTRING_LEN, buf, 368 ETH_GSTRING_LEN); 369 j++; 370 371 snprintf(buf, sizeof(buf), "txq%d_bytes", i); 372 memcpy(data + j * ETH_GSTRING_LEN, buf, 373 ETH_GSTRING_LEN); 374 j++; 375 } 376 break; 377 default: 378 break; 379 } 380 } 381 382 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv) 383 { 384 int i, j = 0; 385 386 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) { 387 const struct bcm_sysport_stats *s; 388 u8 offset = 0; 389 u32 val = 0; 390 char *p; 391 392 s = &bcm_sysport_gstrings_stats[i]; 393 switch (s->type) { 394 case BCM_SYSPORT_STAT_NETDEV: 395 case BCM_SYSPORT_STAT_NETDEV64: 396 case BCM_SYSPORT_STAT_SOFT: 397 continue; 398 case BCM_SYSPORT_STAT_MIB_RX: 399 case BCM_SYSPORT_STAT_MIB_TX: 400 case BCM_SYSPORT_STAT_RUNT: 401 if (priv->is_lite) 402 continue; 403 404 if (s->type != BCM_SYSPORT_STAT_MIB_RX) 405 offset = UMAC_MIB_STAT_OFFSET; 406 val = umac_readl(priv, UMAC_MIB_START + j + offset); 407 break; 408 case BCM_SYSPORT_STAT_RXCHK: 409 val = rxchk_readl(priv, s->reg_offset); 410 if (val == ~0) 411 rxchk_writel(priv, 0, s->reg_offset); 412 break; 413 case BCM_SYSPORT_STAT_RBUF: 414 val = rbuf_readl(priv, s->reg_offset); 415 if (val == ~0) 416 rbuf_writel(priv, 0, s->reg_offset); 417 break; 418 } 419 420 j += s->stat_sizeof; 421 p = (char *)priv + s->stat_offset; 422 *(u32 *)p = val; 423 } 424 425 netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n"); 426 } 427 428 static void bcm_sysport_update_tx_stats(struct bcm_sysport_priv *priv, 429 u64 *tx_bytes, u64 *tx_packets) 430 { 431 struct bcm_sysport_tx_ring *ring; 432 u64 bytes = 0, packets = 0; 433 unsigned int start; 434 unsigned int q; 435 436 for (q = 0; q < priv->netdev->num_tx_queues; q++) { 437 ring = &priv->tx_rings[q]; 438 do { 439 start = u64_stats_fetch_begin_irq(&priv->syncp); 440 bytes = ring->bytes; 441 packets = ring->packets; 442 } while (u64_stats_fetch_retry_irq(&priv->syncp, start)); 443 444 *tx_bytes += bytes; 445 *tx_packets += packets; 446 } 447 } 448 449 static void bcm_sysport_get_stats(struct net_device *dev, 450 struct ethtool_stats *stats, u64 *data) 451 { 452 struct bcm_sysport_priv *priv = netdev_priv(dev); 453 struct bcm_sysport_stats64 *stats64 = &priv->stats64; 454 struct u64_stats_sync *syncp = &priv->syncp; 455 struct bcm_sysport_tx_ring *ring; 456 u64 tx_bytes = 0, tx_packets = 0; 457 unsigned int start; 458 int i, j; 459 460 if (netif_running(dev)) { 461 bcm_sysport_update_mib_counters(priv); 462 bcm_sysport_update_tx_stats(priv, &tx_bytes, &tx_packets); 463 stats64->tx_bytes = tx_bytes; 464 stats64->tx_packets = tx_packets; 465 } 466 467 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) { 468 const struct bcm_sysport_stats *s; 469 char *p; 470 471 s = &bcm_sysport_gstrings_stats[i]; 472 if (s->type == BCM_SYSPORT_STAT_NETDEV) 473 p = (char *)&dev->stats; 474 else if (s->type == BCM_SYSPORT_STAT_NETDEV64) 475 p = (char *)stats64; 476 else 477 p = (char *)priv; 478 479 if (priv->is_lite && !bcm_sysport_lite_stat_valid(s->type)) 480 continue; 481 p += s->stat_offset; 482 483 if (s->stat_sizeof == sizeof(u64) && 484 s->type == BCM_SYSPORT_STAT_NETDEV64) { 485 do { 486 start = u64_stats_fetch_begin_irq(syncp); 487 data[i] = *(u64 *)p; 488 } while (u64_stats_fetch_retry_irq(syncp, start)); 489 } else 490 data[i] = *(u32 *)p; 491 j++; 492 } 493 494 /* For SYSTEMPORT Lite since we have holes in our statistics, j would 495 * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it 496 * needs to point to how many total statistics we have minus the 497 * number of per TX queue statistics 498 */ 499 j = bcm_sysport_get_sset_count(dev, ETH_SS_STATS) - 500 dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT; 501 502 for (i = 0; i < dev->num_tx_queues; i++) { 503 ring = &priv->tx_rings[i]; 504 data[j] = ring->packets; 505 j++; 506 data[j] = ring->bytes; 507 j++; 508 } 509 } 510 511 static void bcm_sysport_get_wol(struct net_device *dev, 512 struct ethtool_wolinfo *wol) 513 { 514 struct bcm_sysport_priv *priv = netdev_priv(dev); 515 516 wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER; 517 wol->wolopts = priv->wolopts; 518 519 if (!(priv->wolopts & WAKE_MAGICSECURE)) 520 return; 521 522 memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass)); 523 } 524 525 static int bcm_sysport_set_wol(struct net_device *dev, 526 struct ethtool_wolinfo *wol) 527 { 528 struct bcm_sysport_priv *priv = netdev_priv(dev); 529 struct device *kdev = &priv->pdev->dev; 530 u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER; 531 532 if (!device_can_wakeup(kdev)) 533 return -ENOTSUPP; 534 535 if (wol->wolopts & ~supported) 536 return -EINVAL; 537 538 if (wol->wolopts & WAKE_MAGICSECURE) 539 memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass)); 540 541 /* Flag the device and relevant IRQ as wakeup capable */ 542 if (wol->wolopts) { 543 device_set_wakeup_enable(kdev, 1); 544 if (priv->wol_irq_disabled) 545 enable_irq_wake(priv->wol_irq); 546 priv->wol_irq_disabled = 0; 547 } else { 548 device_set_wakeup_enable(kdev, 0); 549 /* Avoid unbalanced disable_irq_wake calls */ 550 if (!priv->wol_irq_disabled) 551 disable_irq_wake(priv->wol_irq); 552 priv->wol_irq_disabled = 1; 553 } 554 555 priv->wolopts = wol->wolopts; 556 557 return 0; 558 } 559 560 static void bcm_sysport_set_rx_coalesce(struct bcm_sysport_priv *priv, 561 u32 usecs, u32 pkts) 562 { 563 u32 reg; 564 565 reg = rdma_readl(priv, RDMA_MBDONE_INTR); 566 reg &= ~(RDMA_INTR_THRESH_MASK | 567 RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT); 568 reg |= pkts; 569 reg |= DIV_ROUND_UP(usecs * 1000, 8192) << RDMA_TIMEOUT_SHIFT; 570 rdma_writel(priv, reg, RDMA_MBDONE_INTR); 571 } 572 573 static void bcm_sysport_set_tx_coalesce(struct bcm_sysport_tx_ring *ring, 574 struct ethtool_coalesce *ec) 575 { 576 struct bcm_sysport_priv *priv = ring->priv; 577 u32 reg; 578 579 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(ring->index)); 580 reg &= ~(RING_INTR_THRESH_MASK | 581 RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT); 582 reg |= ec->tx_max_coalesced_frames; 583 reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) << 584 RING_TIMEOUT_SHIFT; 585 tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(ring->index)); 586 } 587 588 static int bcm_sysport_get_coalesce(struct net_device *dev, 589 struct ethtool_coalesce *ec) 590 { 591 struct bcm_sysport_priv *priv = netdev_priv(dev); 592 u32 reg; 593 594 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0)); 595 596 ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000; 597 ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK; 598 599 reg = rdma_readl(priv, RDMA_MBDONE_INTR); 600 601 ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000; 602 ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK; 603 ec->use_adaptive_rx_coalesce = priv->dim.use_dim; 604 605 return 0; 606 } 607 608 static int bcm_sysport_set_coalesce(struct net_device *dev, 609 struct ethtool_coalesce *ec) 610 { 611 struct bcm_sysport_priv *priv = netdev_priv(dev); 612 struct dim_cq_moder moder; 613 u32 usecs, pkts; 614 unsigned int i; 615 616 /* Base system clock is 125Mhz, DMA timeout is this reference clock 617 * divided by 1024, which yield roughly 8.192 us, our maximum value has 618 * to fit in the RING_TIMEOUT_MASK (16 bits). 619 */ 620 if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK || 621 ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 || 622 ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK || 623 ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1) 624 return -EINVAL; 625 626 if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) || 627 (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0) || 628 ec->use_adaptive_tx_coalesce) 629 return -EINVAL; 630 631 for (i = 0; i < dev->num_tx_queues; i++) 632 bcm_sysport_set_tx_coalesce(&priv->tx_rings[i], ec); 633 634 priv->rx_coalesce_usecs = ec->rx_coalesce_usecs; 635 priv->rx_max_coalesced_frames = ec->rx_max_coalesced_frames; 636 usecs = priv->rx_coalesce_usecs; 637 pkts = priv->rx_max_coalesced_frames; 638 639 if (ec->use_adaptive_rx_coalesce && !priv->dim.use_dim) { 640 moder = net_dim_get_def_rx_moderation(priv->dim.dim.mode); 641 usecs = moder.usec; 642 pkts = moder.pkts; 643 } 644 645 priv->dim.use_dim = ec->use_adaptive_rx_coalesce; 646 647 /* Apply desired coalescing parameters */ 648 bcm_sysport_set_rx_coalesce(priv, usecs, pkts); 649 650 return 0; 651 } 652 653 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb) 654 { 655 dev_consume_skb_any(cb->skb); 656 cb->skb = NULL; 657 dma_unmap_addr_set(cb, dma_addr, 0); 658 } 659 660 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv, 661 struct bcm_sysport_cb *cb) 662 { 663 struct device *kdev = &priv->pdev->dev; 664 struct net_device *ndev = priv->netdev; 665 struct sk_buff *skb, *rx_skb; 666 dma_addr_t mapping; 667 668 /* Allocate a new SKB for a new packet */ 669 skb = netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH); 670 if (!skb) { 671 priv->mib.alloc_rx_buff_failed++; 672 netif_err(priv, rx_err, ndev, "SKB alloc failed\n"); 673 return NULL; 674 } 675 676 mapping = dma_map_single(kdev, skb->data, 677 RX_BUF_LENGTH, DMA_FROM_DEVICE); 678 if (dma_mapping_error(kdev, mapping)) { 679 priv->mib.rx_dma_failed++; 680 dev_kfree_skb_any(skb); 681 netif_err(priv, rx_err, ndev, "DMA mapping failure\n"); 682 return NULL; 683 } 684 685 /* Grab the current SKB on the ring */ 686 rx_skb = cb->skb; 687 if (likely(rx_skb)) 688 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr), 689 RX_BUF_LENGTH, DMA_FROM_DEVICE); 690 691 /* Put the new SKB on the ring */ 692 cb->skb = skb; 693 dma_unmap_addr_set(cb, dma_addr, mapping); 694 dma_desc_set_addr(priv, cb->bd_addr, mapping); 695 696 netif_dbg(priv, rx_status, ndev, "RX refill\n"); 697 698 /* Return the current SKB to the caller */ 699 return rx_skb; 700 } 701 702 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv) 703 { 704 struct bcm_sysport_cb *cb; 705 struct sk_buff *skb; 706 unsigned int i; 707 708 for (i = 0; i < priv->num_rx_bds; i++) { 709 cb = &priv->rx_cbs[i]; 710 skb = bcm_sysport_rx_refill(priv, cb); 711 dev_kfree_skb(skb); 712 if (!cb->skb) 713 return -ENOMEM; 714 } 715 716 return 0; 717 } 718 719 /* Poll the hardware for up to budget packets to process */ 720 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv, 721 unsigned int budget) 722 { 723 struct bcm_sysport_stats64 *stats64 = &priv->stats64; 724 struct net_device *ndev = priv->netdev; 725 unsigned int processed = 0, to_process; 726 unsigned int processed_bytes = 0; 727 struct bcm_sysport_cb *cb; 728 struct sk_buff *skb; 729 unsigned int p_index; 730 u16 len, status; 731 struct bcm_rsb *rsb; 732 733 /* Clear status before servicing to reduce spurious interrupts */ 734 intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR); 735 736 /* Determine how much we should process since last call, SYSTEMPORT Lite 737 * groups the producer and consumer indexes into the same 32-bit 738 * which we access using RDMA_CONS_INDEX 739 */ 740 if (!priv->is_lite) 741 p_index = rdma_readl(priv, RDMA_PROD_INDEX); 742 else 743 p_index = rdma_readl(priv, RDMA_CONS_INDEX); 744 p_index &= RDMA_PROD_INDEX_MASK; 745 746 to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK; 747 748 netif_dbg(priv, rx_status, ndev, 749 "p_index=%d rx_c_index=%d to_process=%d\n", 750 p_index, priv->rx_c_index, to_process); 751 752 while ((processed < to_process) && (processed < budget)) { 753 cb = &priv->rx_cbs[priv->rx_read_ptr]; 754 skb = bcm_sysport_rx_refill(priv, cb); 755 756 757 /* We do not have a backing SKB, so we do not a corresponding 758 * DMA mapping for this incoming packet since 759 * bcm_sysport_rx_refill always either has both skb and mapping 760 * or none. 761 */ 762 if (unlikely(!skb)) { 763 netif_err(priv, rx_err, ndev, "out of memory!\n"); 764 ndev->stats.rx_dropped++; 765 ndev->stats.rx_errors++; 766 goto next; 767 } 768 769 /* Extract the Receive Status Block prepended */ 770 rsb = (struct bcm_rsb *)skb->data; 771 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK; 772 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) & 773 DESC_STATUS_MASK; 774 775 netif_dbg(priv, rx_status, ndev, 776 "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n", 777 p_index, priv->rx_c_index, priv->rx_read_ptr, 778 len, status); 779 780 if (unlikely(len > RX_BUF_LENGTH)) { 781 netif_err(priv, rx_status, ndev, "oversized packet\n"); 782 ndev->stats.rx_length_errors++; 783 ndev->stats.rx_errors++; 784 dev_kfree_skb_any(skb); 785 goto next; 786 } 787 788 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) { 789 netif_err(priv, rx_status, ndev, "fragmented packet!\n"); 790 ndev->stats.rx_dropped++; 791 ndev->stats.rx_errors++; 792 dev_kfree_skb_any(skb); 793 goto next; 794 } 795 796 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) { 797 netif_err(priv, rx_err, ndev, "error packet\n"); 798 if (status & RX_STATUS_OVFLOW) 799 ndev->stats.rx_over_errors++; 800 ndev->stats.rx_dropped++; 801 ndev->stats.rx_errors++; 802 dev_kfree_skb_any(skb); 803 goto next; 804 } 805 806 skb_put(skb, len); 807 808 /* Hardware validated our checksum */ 809 if (likely(status & DESC_L4_CSUM)) 810 skb->ip_summed = CHECKSUM_UNNECESSARY; 811 812 /* Hardware pre-pends packets with 2bytes before Ethernet 813 * header plus we have the Receive Status Block, strip off all 814 * of this from the SKB. 815 */ 816 skb_pull(skb, sizeof(*rsb) + 2); 817 len -= (sizeof(*rsb) + 2); 818 processed_bytes += len; 819 820 /* UniMAC may forward CRC */ 821 if (priv->crc_fwd) { 822 skb_trim(skb, len - ETH_FCS_LEN); 823 len -= ETH_FCS_LEN; 824 } 825 826 skb->protocol = eth_type_trans(skb, ndev); 827 ndev->stats.rx_packets++; 828 ndev->stats.rx_bytes += len; 829 u64_stats_update_begin(&priv->syncp); 830 stats64->rx_packets++; 831 stats64->rx_bytes += len; 832 u64_stats_update_end(&priv->syncp); 833 834 napi_gro_receive(&priv->napi, skb); 835 next: 836 processed++; 837 priv->rx_read_ptr++; 838 839 if (priv->rx_read_ptr == priv->num_rx_bds) 840 priv->rx_read_ptr = 0; 841 } 842 843 priv->dim.packets = processed; 844 priv->dim.bytes = processed_bytes; 845 846 return processed; 847 } 848 849 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring, 850 struct bcm_sysport_cb *cb, 851 unsigned int *bytes_compl, 852 unsigned int *pkts_compl) 853 { 854 struct bcm_sysport_priv *priv = ring->priv; 855 struct device *kdev = &priv->pdev->dev; 856 857 if (cb->skb) { 858 *bytes_compl += cb->skb->len; 859 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr), 860 dma_unmap_len(cb, dma_len), 861 DMA_TO_DEVICE); 862 (*pkts_compl)++; 863 bcm_sysport_free_cb(cb); 864 /* SKB fragment */ 865 } else if (dma_unmap_addr(cb, dma_addr)) { 866 *bytes_compl += dma_unmap_len(cb, dma_len); 867 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr), 868 dma_unmap_len(cb, dma_len), DMA_TO_DEVICE); 869 dma_unmap_addr_set(cb, dma_addr, 0); 870 } 871 } 872 873 /* Reclaim queued SKBs for transmission completion, lockless version */ 874 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv, 875 struct bcm_sysport_tx_ring *ring) 876 { 877 unsigned int pkts_compl = 0, bytes_compl = 0; 878 struct net_device *ndev = priv->netdev; 879 unsigned int txbds_processed = 0; 880 struct bcm_sysport_cb *cb; 881 unsigned int txbds_ready; 882 unsigned int c_index; 883 u32 hw_ind; 884 885 /* Clear status before servicing to reduce spurious interrupts */ 886 if (!ring->priv->is_lite) 887 intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR); 888 else 889 intrl2_0_writel(ring->priv, BIT(ring->index + 890 INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR); 891 892 /* Compute how many descriptors have been processed since last call */ 893 hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index)); 894 c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK; 895 txbds_ready = (c_index - ring->c_index) & RING_CONS_INDEX_MASK; 896 897 netif_dbg(priv, tx_done, ndev, 898 "ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n", 899 ring->index, ring->c_index, c_index, txbds_ready); 900 901 while (txbds_processed < txbds_ready) { 902 cb = &ring->cbs[ring->clean_index]; 903 bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl); 904 905 ring->desc_count++; 906 txbds_processed++; 907 908 if (likely(ring->clean_index < ring->size - 1)) 909 ring->clean_index++; 910 else 911 ring->clean_index = 0; 912 } 913 914 u64_stats_update_begin(&priv->syncp); 915 ring->packets += pkts_compl; 916 ring->bytes += bytes_compl; 917 u64_stats_update_end(&priv->syncp); 918 919 ring->c_index = c_index; 920 921 netif_dbg(priv, tx_done, ndev, 922 "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n", 923 ring->index, ring->c_index, pkts_compl, bytes_compl); 924 925 return pkts_compl; 926 } 927 928 /* Locked version of the per-ring TX reclaim routine */ 929 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv, 930 struct bcm_sysport_tx_ring *ring) 931 { 932 struct netdev_queue *txq; 933 unsigned int released; 934 unsigned long flags; 935 936 txq = netdev_get_tx_queue(priv->netdev, ring->index); 937 938 spin_lock_irqsave(&ring->lock, flags); 939 released = __bcm_sysport_tx_reclaim(priv, ring); 940 if (released) 941 netif_tx_wake_queue(txq); 942 943 spin_unlock_irqrestore(&ring->lock, flags); 944 945 return released; 946 } 947 948 /* Locked version of the per-ring TX reclaim, but does not wake the queue */ 949 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv, 950 struct bcm_sysport_tx_ring *ring) 951 { 952 unsigned long flags; 953 954 spin_lock_irqsave(&ring->lock, flags); 955 __bcm_sysport_tx_reclaim(priv, ring); 956 spin_unlock_irqrestore(&ring->lock, flags); 957 } 958 959 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget) 960 { 961 struct bcm_sysport_tx_ring *ring = 962 container_of(napi, struct bcm_sysport_tx_ring, napi); 963 unsigned int work_done = 0; 964 965 work_done = bcm_sysport_tx_reclaim(ring->priv, ring); 966 967 if (work_done == 0) { 968 napi_complete(napi); 969 /* re-enable TX interrupt */ 970 if (!ring->priv->is_lite) 971 intrl2_1_mask_clear(ring->priv, BIT(ring->index)); 972 else 973 intrl2_0_mask_clear(ring->priv, BIT(ring->index + 974 INTRL2_0_TDMA_MBDONE_SHIFT)); 975 976 return 0; 977 } 978 979 return budget; 980 } 981 982 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv) 983 { 984 unsigned int q; 985 986 for (q = 0; q < priv->netdev->num_tx_queues; q++) 987 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]); 988 } 989 990 static int bcm_sysport_poll(struct napi_struct *napi, int budget) 991 { 992 struct bcm_sysport_priv *priv = 993 container_of(napi, struct bcm_sysport_priv, napi); 994 struct dim_sample dim_sample = {}; 995 unsigned int work_done = 0; 996 997 work_done = bcm_sysport_desc_rx(priv, budget); 998 999 priv->rx_c_index += work_done; 1000 priv->rx_c_index &= RDMA_CONS_INDEX_MASK; 1001 1002 /* SYSTEMPORT Lite groups the producer/consumer index, producer is 1003 * maintained by HW, but writes to it will be ignore while RDMA 1004 * is active 1005 */ 1006 if (!priv->is_lite) 1007 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX); 1008 else 1009 rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX); 1010 1011 if (work_done < budget) { 1012 napi_complete_done(napi, work_done); 1013 /* re-enable RX interrupts */ 1014 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE); 1015 } 1016 1017 if (priv->dim.use_dim) { 1018 dim_update_sample(priv->dim.event_ctr, priv->dim.packets, 1019 priv->dim.bytes, &dim_sample); 1020 net_dim(&priv->dim.dim, dim_sample); 1021 } 1022 1023 return work_done; 1024 } 1025 1026 static void mpd_enable_set(struct bcm_sysport_priv *priv, bool enable) 1027 { 1028 u32 reg, bit; 1029 1030 reg = umac_readl(priv, UMAC_MPD_CTRL); 1031 if (enable) 1032 reg |= MPD_EN; 1033 else 1034 reg &= ~MPD_EN; 1035 umac_writel(priv, reg, UMAC_MPD_CTRL); 1036 1037 if (priv->is_lite) 1038 bit = RBUF_ACPI_EN_LITE; 1039 else 1040 bit = RBUF_ACPI_EN; 1041 1042 reg = rbuf_readl(priv, RBUF_CONTROL); 1043 if (enable) 1044 reg |= bit; 1045 else 1046 reg &= ~bit; 1047 rbuf_writel(priv, reg, RBUF_CONTROL); 1048 } 1049 1050 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv) 1051 { 1052 unsigned int index; 1053 u32 reg; 1054 1055 /* Disable RXCHK, active filters and Broadcom tag matching */ 1056 reg = rxchk_readl(priv, RXCHK_CONTROL); 1057 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK << 1058 RXCHK_BRCM_TAG_MATCH_SHIFT | RXCHK_EN | RXCHK_BRCM_TAG_EN); 1059 rxchk_writel(priv, reg, RXCHK_CONTROL); 1060 1061 /* Make sure we restore correct CID index in case HW lost 1062 * its context during deep idle state 1063 */ 1064 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) { 1065 rxchk_writel(priv, priv->filters_loc[index] << 1066 RXCHK_BRCM_TAG_CID_SHIFT, RXCHK_BRCM_TAG(index)); 1067 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index)); 1068 } 1069 1070 /* Clear the MagicPacket detection logic */ 1071 mpd_enable_set(priv, false); 1072 1073 reg = intrl2_0_readl(priv, INTRL2_CPU_STATUS); 1074 if (reg & INTRL2_0_MPD) 1075 netdev_info(priv->netdev, "Wake-on-LAN (MPD) interrupt!\n"); 1076 1077 if (reg & INTRL2_0_BRCM_MATCH_TAG) { 1078 reg = rxchk_readl(priv, RXCHK_BRCM_TAG_MATCH_STATUS) & 1079 RXCHK_BRCM_TAG_MATCH_MASK; 1080 netdev_info(priv->netdev, 1081 "Wake-on-LAN (filters 0x%02x) interrupt!\n", reg); 1082 } 1083 1084 netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n"); 1085 } 1086 1087 static void bcm_sysport_dim_work(struct work_struct *work) 1088 { 1089 struct dim *dim = container_of(work, struct dim, work); 1090 struct bcm_sysport_net_dim *ndim = 1091 container_of(dim, struct bcm_sysport_net_dim, dim); 1092 struct bcm_sysport_priv *priv = 1093 container_of(ndim, struct bcm_sysport_priv, dim); 1094 struct dim_cq_moder cur_profile = net_dim_get_rx_moderation(dim->mode, 1095 dim->profile_ix); 1096 1097 bcm_sysport_set_rx_coalesce(priv, cur_profile.usec, cur_profile.pkts); 1098 dim->state = DIM_START_MEASURE; 1099 } 1100 1101 /* RX and misc interrupt routine */ 1102 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id) 1103 { 1104 struct net_device *dev = dev_id; 1105 struct bcm_sysport_priv *priv = netdev_priv(dev); 1106 struct bcm_sysport_tx_ring *txr; 1107 unsigned int ring, ring_bit; 1108 1109 priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) & 1110 ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS); 1111 intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR); 1112 1113 if (unlikely(priv->irq0_stat == 0)) { 1114 netdev_warn(priv->netdev, "spurious RX interrupt\n"); 1115 return IRQ_NONE; 1116 } 1117 1118 if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) { 1119 priv->dim.event_ctr++; 1120 if (likely(napi_schedule_prep(&priv->napi))) { 1121 /* disable RX interrupts */ 1122 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE); 1123 __napi_schedule_irqoff(&priv->napi); 1124 } 1125 } 1126 1127 /* TX ring is full, perform a full reclaim since we do not know 1128 * which one would trigger this interrupt 1129 */ 1130 if (priv->irq0_stat & INTRL2_0_TX_RING_FULL) 1131 bcm_sysport_tx_reclaim_all(priv); 1132 1133 if (!priv->is_lite) 1134 goto out; 1135 1136 for (ring = 0; ring < dev->num_tx_queues; ring++) { 1137 ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT); 1138 if (!(priv->irq0_stat & ring_bit)) 1139 continue; 1140 1141 txr = &priv->tx_rings[ring]; 1142 1143 if (likely(napi_schedule_prep(&txr->napi))) { 1144 intrl2_0_mask_set(priv, ring_bit); 1145 __napi_schedule(&txr->napi); 1146 } 1147 } 1148 out: 1149 return IRQ_HANDLED; 1150 } 1151 1152 /* TX interrupt service routine */ 1153 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id) 1154 { 1155 struct net_device *dev = dev_id; 1156 struct bcm_sysport_priv *priv = netdev_priv(dev); 1157 struct bcm_sysport_tx_ring *txr; 1158 unsigned int ring; 1159 1160 priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) & 1161 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS); 1162 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); 1163 1164 if (unlikely(priv->irq1_stat == 0)) { 1165 netdev_warn(priv->netdev, "spurious TX interrupt\n"); 1166 return IRQ_NONE; 1167 } 1168 1169 for (ring = 0; ring < dev->num_tx_queues; ring++) { 1170 if (!(priv->irq1_stat & BIT(ring))) 1171 continue; 1172 1173 txr = &priv->tx_rings[ring]; 1174 1175 if (likely(napi_schedule_prep(&txr->napi))) { 1176 intrl2_1_mask_set(priv, BIT(ring)); 1177 __napi_schedule_irqoff(&txr->napi); 1178 } 1179 } 1180 1181 return IRQ_HANDLED; 1182 } 1183 1184 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id) 1185 { 1186 struct bcm_sysport_priv *priv = dev_id; 1187 1188 pm_wakeup_event(&priv->pdev->dev, 0); 1189 1190 return IRQ_HANDLED; 1191 } 1192 1193 #ifdef CONFIG_NET_POLL_CONTROLLER 1194 static void bcm_sysport_poll_controller(struct net_device *dev) 1195 { 1196 struct bcm_sysport_priv *priv = netdev_priv(dev); 1197 1198 disable_irq(priv->irq0); 1199 bcm_sysport_rx_isr(priv->irq0, priv); 1200 enable_irq(priv->irq0); 1201 1202 if (!priv->is_lite) { 1203 disable_irq(priv->irq1); 1204 bcm_sysport_tx_isr(priv->irq1, priv); 1205 enable_irq(priv->irq1); 1206 } 1207 } 1208 #endif 1209 1210 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb, 1211 struct net_device *dev) 1212 { 1213 struct bcm_sysport_priv *priv = netdev_priv(dev); 1214 struct sk_buff *nskb; 1215 struct bcm_tsb *tsb; 1216 u32 csum_info; 1217 u8 ip_proto; 1218 u16 csum_start; 1219 __be16 ip_ver; 1220 1221 /* Re-allocate SKB if needed */ 1222 if (unlikely(skb_headroom(skb) < sizeof(*tsb))) { 1223 nskb = skb_realloc_headroom(skb, sizeof(*tsb)); 1224 if (!nskb) { 1225 dev_kfree_skb_any(skb); 1226 priv->mib.tx_realloc_tsb_failed++; 1227 dev->stats.tx_errors++; 1228 dev->stats.tx_dropped++; 1229 return NULL; 1230 } 1231 dev_consume_skb_any(skb); 1232 skb = nskb; 1233 priv->mib.tx_realloc_tsb++; 1234 } 1235 1236 tsb = skb_push(skb, sizeof(*tsb)); 1237 /* Zero-out TSB by default */ 1238 memset(tsb, 0, sizeof(*tsb)); 1239 1240 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1241 ip_ver = skb->protocol; 1242 switch (ip_ver) { 1243 case htons(ETH_P_IP): 1244 ip_proto = ip_hdr(skb)->protocol; 1245 break; 1246 case htons(ETH_P_IPV6): 1247 ip_proto = ipv6_hdr(skb)->nexthdr; 1248 break; 1249 default: 1250 return skb; 1251 } 1252 1253 /* Get the checksum offset and the L4 (transport) offset */ 1254 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb); 1255 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK; 1256 csum_info |= (csum_start << L4_PTR_SHIFT); 1257 1258 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) { 1259 csum_info |= L4_LENGTH_VALID; 1260 if (ip_proto == IPPROTO_UDP && 1261 ip_ver == htons(ETH_P_IP)) 1262 csum_info |= L4_UDP; 1263 } else { 1264 csum_info = 0; 1265 } 1266 1267 tsb->l4_ptr_dest_map = csum_info; 1268 } 1269 1270 return skb; 1271 } 1272 1273 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb, 1274 struct net_device *dev) 1275 { 1276 struct bcm_sysport_priv *priv = netdev_priv(dev); 1277 struct device *kdev = &priv->pdev->dev; 1278 struct bcm_sysport_tx_ring *ring; 1279 struct bcm_sysport_cb *cb; 1280 struct netdev_queue *txq; 1281 u32 len_status, addr_lo; 1282 unsigned int skb_len; 1283 unsigned long flags; 1284 dma_addr_t mapping; 1285 u16 queue; 1286 int ret; 1287 1288 queue = skb_get_queue_mapping(skb); 1289 txq = netdev_get_tx_queue(dev, queue); 1290 ring = &priv->tx_rings[queue]; 1291 1292 /* lock against tx reclaim in BH context and TX ring full interrupt */ 1293 spin_lock_irqsave(&ring->lock, flags); 1294 if (unlikely(ring->desc_count == 0)) { 1295 netif_tx_stop_queue(txq); 1296 netdev_err(dev, "queue %d awake and ring full!\n", queue); 1297 ret = NETDEV_TX_BUSY; 1298 goto out; 1299 } 1300 1301 /* Insert TSB and checksum infos */ 1302 if (priv->tsb_en) { 1303 skb = bcm_sysport_insert_tsb(skb, dev); 1304 if (!skb) { 1305 ret = NETDEV_TX_OK; 1306 goto out; 1307 } 1308 } 1309 1310 skb_len = skb->len; 1311 1312 mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE); 1313 if (dma_mapping_error(kdev, mapping)) { 1314 priv->mib.tx_dma_failed++; 1315 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n", 1316 skb->data, skb_len); 1317 ret = NETDEV_TX_OK; 1318 goto out; 1319 } 1320 1321 /* Remember the SKB for future freeing */ 1322 cb = &ring->cbs[ring->curr_desc]; 1323 cb->skb = skb; 1324 dma_unmap_addr_set(cb, dma_addr, mapping); 1325 dma_unmap_len_set(cb, dma_len, skb_len); 1326 1327 addr_lo = lower_32_bits(mapping); 1328 len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK; 1329 len_status |= (skb_len << DESC_LEN_SHIFT); 1330 len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) << 1331 DESC_STATUS_SHIFT; 1332 if (skb->ip_summed == CHECKSUM_PARTIAL) 1333 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT); 1334 1335 ring->curr_desc++; 1336 if (ring->curr_desc == ring->size) 1337 ring->curr_desc = 0; 1338 ring->desc_count--; 1339 1340 /* Ports are latched, so write upper address first */ 1341 tdma_writel(priv, len_status, TDMA_WRITE_PORT_HI(ring->index)); 1342 tdma_writel(priv, addr_lo, TDMA_WRITE_PORT_LO(ring->index)); 1343 1344 /* Check ring space and update SW control flow */ 1345 if (ring->desc_count == 0) 1346 netif_tx_stop_queue(txq); 1347 1348 netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n", 1349 ring->index, ring->desc_count, ring->curr_desc); 1350 1351 ret = NETDEV_TX_OK; 1352 out: 1353 spin_unlock_irqrestore(&ring->lock, flags); 1354 return ret; 1355 } 1356 1357 static void bcm_sysport_tx_timeout(struct net_device *dev, unsigned int txqueue) 1358 { 1359 netdev_warn(dev, "transmit timeout!\n"); 1360 1361 netif_trans_update(dev); 1362 dev->stats.tx_errors++; 1363 1364 netif_tx_wake_all_queues(dev); 1365 } 1366 1367 /* phylib adjust link callback */ 1368 static void bcm_sysport_adj_link(struct net_device *dev) 1369 { 1370 struct bcm_sysport_priv *priv = netdev_priv(dev); 1371 struct phy_device *phydev = dev->phydev; 1372 unsigned int changed = 0; 1373 u32 cmd_bits = 0, reg; 1374 1375 if (priv->old_link != phydev->link) { 1376 changed = 1; 1377 priv->old_link = phydev->link; 1378 } 1379 1380 if (priv->old_duplex != phydev->duplex) { 1381 changed = 1; 1382 priv->old_duplex = phydev->duplex; 1383 } 1384 1385 if (priv->is_lite) 1386 goto out; 1387 1388 switch (phydev->speed) { 1389 case SPEED_2500: 1390 cmd_bits = CMD_SPEED_2500; 1391 break; 1392 case SPEED_1000: 1393 cmd_bits = CMD_SPEED_1000; 1394 break; 1395 case SPEED_100: 1396 cmd_bits = CMD_SPEED_100; 1397 break; 1398 case SPEED_10: 1399 cmd_bits = CMD_SPEED_10; 1400 break; 1401 default: 1402 break; 1403 } 1404 cmd_bits <<= CMD_SPEED_SHIFT; 1405 1406 if (phydev->duplex == DUPLEX_HALF) 1407 cmd_bits |= CMD_HD_EN; 1408 1409 if (priv->old_pause != phydev->pause) { 1410 changed = 1; 1411 priv->old_pause = phydev->pause; 1412 } 1413 1414 if (!phydev->pause) 1415 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE; 1416 1417 if (!changed) 1418 return; 1419 1420 if (phydev->link) { 1421 reg = umac_readl(priv, UMAC_CMD); 1422 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) | 1423 CMD_HD_EN | CMD_RX_PAUSE_IGNORE | 1424 CMD_TX_PAUSE_IGNORE); 1425 reg |= cmd_bits; 1426 umac_writel(priv, reg, UMAC_CMD); 1427 } 1428 out: 1429 if (changed) 1430 phy_print_status(phydev); 1431 } 1432 1433 static void bcm_sysport_init_dim(struct bcm_sysport_priv *priv, 1434 void (*cb)(struct work_struct *work)) 1435 { 1436 struct bcm_sysport_net_dim *dim = &priv->dim; 1437 1438 INIT_WORK(&dim->dim.work, cb); 1439 dim->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE; 1440 dim->event_ctr = 0; 1441 dim->packets = 0; 1442 dim->bytes = 0; 1443 } 1444 1445 static void bcm_sysport_init_rx_coalesce(struct bcm_sysport_priv *priv) 1446 { 1447 struct bcm_sysport_net_dim *dim = &priv->dim; 1448 struct dim_cq_moder moder; 1449 u32 usecs, pkts; 1450 1451 usecs = priv->rx_coalesce_usecs; 1452 pkts = priv->rx_max_coalesced_frames; 1453 1454 /* If DIM was enabled, re-apply default parameters */ 1455 if (dim->use_dim) { 1456 moder = net_dim_get_def_rx_moderation(dim->dim.mode); 1457 usecs = moder.usec; 1458 pkts = moder.pkts; 1459 } 1460 1461 bcm_sysport_set_rx_coalesce(priv, usecs, pkts); 1462 } 1463 1464 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv, 1465 unsigned int index) 1466 { 1467 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index]; 1468 size_t size; 1469 u32 reg; 1470 1471 /* Simple descriptors partitioning for now */ 1472 size = 256; 1473 1474 ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL); 1475 if (!ring->cbs) { 1476 netif_err(priv, hw, priv->netdev, "CB allocation failed\n"); 1477 return -ENOMEM; 1478 } 1479 1480 /* Initialize SW view of the ring */ 1481 spin_lock_init(&ring->lock); 1482 ring->priv = priv; 1483 netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64); 1484 ring->index = index; 1485 ring->size = size; 1486 ring->clean_index = 0; 1487 ring->alloc_size = ring->size; 1488 ring->desc_count = ring->size; 1489 ring->curr_desc = 0; 1490 1491 /* Initialize HW ring */ 1492 tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index)); 1493 tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index)); 1494 tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index)); 1495 tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index)); 1496 1497 /* Configure QID and port mapping */ 1498 reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index)); 1499 reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT); 1500 if (ring->inspect) { 1501 reg |= ring->switch_queue & RING_QID_MASK; 1502 reg |= ring->switch_port << RING_PORT_ID_SHIFT; 1503 } else { 1504 reg |= RING_IGNORE_STATUS; 1505 } 1506 tdma_writel(priv, reg, TDMA_DESC_RING_MAPPING(index)); 1507 tdma_writel(priv, 0, TDMA_DESC_RING_PCP_DEI_VID(index)); 1508 1509 /* Enable ACB algorithm 2 */ 1510 reg = tdma_readl(priv, TDMA_CONTROL); 1511 reg |= tdma_control_bit(priv, ACB_ALGO); 1512 tdma_writel(priv, reg, TDMA_CONTROL); 1513 1514 /* Do not use tdma_control_bit() here because TSB_SWAP1 collides 1515 * with the original definition of ACB_ALGO 1516 */ 1517 reg = tdma_readl(priv, TDMA_CONTROL); 1518 if (priv->is_lite) 1519 reg &= ~BIT(TSB_SWAP1); 1520 /* Set a correct TSB format based on host endian */ 1521 if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)) 1522 reg |= tdma_control_bit(priv, TSB_SWAP0); 1523 else 1524 reg &= ~tdma_control_bit(priv, TSB_SWAP0); 1525 tdma_writel(priv, reg, TDMA_CONTROL); 1526 1527 /* Program the number of descriptors as MAX_THRESHOLD and half of 1528 * its size for the hysteresis trigger 1529 */ 1530 tdma_writel(priv, ring->size | 1531 1 << RING_HYST_THRESH_SHIFT, 1532 TDMA_DESC_RING_MAX_HYST(index)); 1533 1534 /* Enable the ring queue in the arbiter */ 1535 reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN); 1536 reg |= (1 << index); 1537 tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN); 1538 1539 napi_enable(&ring->napi); 1540 1541 netif_dbg(priv, hw, priv->netdev, 1542 "TDMA cfg, size=%d, switch q=%d,port=%d\n", 1543 ring->size, ring->switch_queue, 1544 ring->switch_port); 1545 1546 return 0; 1547 } 1548 1549 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv, 1550 unsigned int index) 1551 { 1552 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index]; 1553 u32 reg; 1554 1555 /* Caller should stop the TDMA engine */ 1556 reg = tdma_readl(priv, TDMA_STATUS); 1557 if (!(reg & TDMA_DISABLED)) 1558 netdev_warn(priv->netdev, "TDMA not stopped!\n"); 1559 1560 /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could 1561 * fail, so by checking this pointer we know whether the TX ring was 1562 * fully initialized or not. 1563 */ 1564 if (!ring->cbs) 1565 return; 1566 1567 napi_disable(&ring->napi); 1568 netif_napi_del(&ring->napi); 1569 1570 bcm_sysport_tx_clean(priv, ring); 1571 1572 kfree(ring->cbs); 1573 ring->cbs = NULL; 1574 ring->size = 0; 1575 ring->alloc_size = 0; 1576 1577 netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n"); 1578 } 1579 1580 /* RDMA helper */ 1581 static inline int rdma_enable_set(struct bcm_sysport_priv *priv, 1582 unsigned int enable) 1583 { 1584 unsigned int timeout = 1000; 1585 u32 reg; 1586 1587 reg = rdma_readl(priv, RDMA_CONTROL); 1588 if (enable) 1589 reg |= RDMA_EN; 1590 else 1591 reg &= ~RDMA_EN; 1592 rdma_writel(priv, reg, RDMA_CONTROL); 1593 1594 /* Poll for RMDA disabling completion */ 1595 do { 1596 reg = rdma_readl(priv, RDMA_STATUS); 1597 if (!!(reg & RDMA_DISABLED) == !enable) 1598 return 0; 1599 usleep_range(1000, 2000); 1600 } while (timeout-- > 0); 1601 1602 netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n"); 1603 1604 return -ETIMEDOUT; 1605 } 1606 1607 /* TDMA helper */ 1608 static inline int tdma_enable_set(struct bcm_sysport_priv *priv, 1609 unsigned int enable) 1610 { 1611 unsigned int timeout = 1000; 1612 u32 reg; 1613 1614 reg = tdma_readl(priv, TDMA_CONTROL); 1615 if (enable) 1616 reg |= tdma_control_bit(priv, TDMA_EN); 1617 else 1618 reg &= ~tdma_control_bit(priv, TDMA_EN); 1619 tdma_writel(priv, reg, TDMA_CONTROL); 1620 1621 /* Poll for TMDA disabling completion */ 1622 do { 1623 reg = tdma_readl(priv, TDMA_STATUS); 1624 if (!!(reg & TDMA_DISABLED) == !enable) 1625 return 0; 1626 1627 usleep_range(1000, 2000); 1628 } while (timeout-- > 0); 1629 1630 netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n"); 1631 1632 return -ETIMEDOUT; 1633 } 1634 1635 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv) 1636 { 1637 struct bcm_sysport_cb *cb; 1638 u32 reg; 1639 int ret; 1640 int i; 1641 1642 /* Initialize SW view of the RX ring */ 1643 priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC; 1644 priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET; 1645 priv->rx_c_index = 0; 1646 priv->rx_read_ptr = 0; 1647 priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb), 1648 GFP_KERNEL); 1649 if (!priv->rx_cbs) { 1650 netif_err(priv, hw, priv->netdev, "CB allocation failed\n"); 1651 return -ENOMEM; 1652 } 1653 1654 for (i = 0; i < priv->num_rx_bds; i++) { 1655 cb = priv->rx_cbs + i; 1656 cb->bd_addr = priv->rx_bds + i * DESC_SIZE; 1657 } 1658 1659 ret = bcm_sysport_alloc_rx_bufs(priv); 1660 if (ret) { 1661 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n"); 1662 return ret; 1663 } 1664 1665 /* Initialize HW, ensure RDMA is disabled */ 1666 reg = rdma_readl(priv, RDMA_STATUS); 1667 if (!(reg & RDMA_DISABLED)) 1668 rdma_enable_set(priv, 0); 1669 1670 rdma_writel(priv, 0, RDMA_WRITE_PTR_LO); 1671 rdma_writel(priv, 0, RDMA_WRITE_PTR_HI); 1672 rdma_writel(priv, 0, RDMA_PROD_INDEX); 1673 rdma_writel(priv, 0, RDMA_CONS_INDEX); 1674 rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT | 1675 RX_BUF_LENGTH, RDMA_RING_BUF_SIZE); 1676 /* Operate the queue in ring mode */ 1677 rdma_writel(priv, 0, RDMA_START_ADDR_HI); 1678 rdma_writel(priv, 0, RDMA_START_ADDR_LO); 1679 rdma_writel(priv, 0, RDMA_END_ADDR_HI); 1680 rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO); 1681 1682 netif_dbg(priv, hw, priv->netdev, 1683 "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n", 1684 priv->num_rx_bds, priv->rx_bds); 1685 1686 return 0; 1687 } 1688 1689 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv) 1690 { 1691 struct bcm_sysport_cb *cb; 1692 unsigned int i; 1693 u32 reg; 1694 1695 /* Caller should ensure RDMA is disabled */ 1696 reg = rdma_readl(priv, RDMA_STATUS); 1697 if (!(reg & RDMA_DISABLED)) 1698 netdev_warn(priv->netdev, "RDMA not stopped!\n"); 1699 1700 for (i = 0; i < priv->num_rx_bds; i++) { 1701 cb = &priv->rx_cbs[i]; 1702 if (dma_unmap_addr(cb, dma_addr)) 1703 dma_unmap_single(&priv->pdev->dev, 1704 dma_unmap_addr(cb, dma_addr), 1705 RX_BUF_LENGTH, DMA_FROM_DEVICE); 1706 bcm_sysport_free_cb(cb); 1707 } 1708 1709 kfree(priv->rx_cbs); 1710 priv->rx_cbs = NULL; 1711 1712 netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n"); 1713 } 1714 1715 static void bcm_sysport_set_rx_mode(struct net_device *dev) 1716 { 1717 struct bcm_sysport_priv *priv = netdev_priv(dev); 1718 u32 reg; 1719 1720 if (priv->is_lite) 1721 return; 1722 1723 reg = umac_readl(priv, UMAC_CMD); 1724 if (dev->flags & IFF_PROMISC) 1725 reg |= CMD_PROMISC; 1726 else 1727 reg &= ~CMD_PROMISC; 1728 umac_writel(priv, reg, UMAC_CMD); 1729 1730 /* No support for ALLMULTI */ 1731 if (dev->flags & IFF_ALLMULTI) 1732 return; 1733 } 1734 1735 static inline void umac_enable_set(struct bcm_sysport_priv *priv, 1736 u32 mask, unsigned int enable) 1737 { 1738 u32 reg; 1739 1740 if (!priv->is_lite) { 1741 reg = umac_readl(priv, UMAC_CMD); 1742 if (enable) 1743 reg |= mask; 1744 else 1745 reg &= ~mask; 1746 umac_writel(priv, reg, UMAC_CMD); 1747 } else { 1748 reg = gib_readl(priv, GIB_CONTROL); 1749 if (enable) 1750 reg |= mask; 1751 else 1752 reg &= ~mask; 1753 gib_writel(priv, reg, GIB_CONTROL); 1754 } 1755 1756 /* UniMAC stops on a packet boundary, wait for a full-sized packet 1757 * to be processed (1 msec). 1758 */ 1759 if (enable == 0) 1760 usleep_range(1000, 2000); 1761 } 1762 1763 static inline void umac_reset(struct bcm_sysport_priv *priv) 1764 { 1765 u32 reg; 1766 1767 if (priv->is_lite) 1768 return; 1769 1770 reg = umac_readl(priv, UMAC_CMD); 1771 reg |= CMD_SW_RESET; 1772 umac_writel(priv, reg, UMAC_CMD); 1773 udelay(10); 1774 reg = umac_readl(priv, UMAC_CMD); 1775 reg &= ~CMD_SW_RESET; 1776 umac_writel(priv, reg, UMAC_CMD); 1777 } 1778 1779 static void umac_set_hw_addr(struct bcm_sysport_priv *priv, 1780 unsigned char *addr) 1781 { 1782 u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | 1783 addr[3]; 1784 u32 mac1 = (addr[4] << 8) | addr[5]; 1785 1786 if (!priv->is_lite) { 1787 umac_writel(priv, mac0, UMAC_MAC0); 1788 umac_writel(priv, mac1, UMAC_MAC1); 1789 } else { 1790 gib_writel(priv, mac0, GIB_MAC0); 1791 gib_writel(priv, mac1, GIB_MAC1); 1792 } 1793 } 1794 1795 static void topctrl_flush(struct bcm_sysport_priv *priv) 1796 { 1797 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL); 1798 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL); 1799 mdelay(1); 1800 topctrl_writel(priv, 0, RX_FLUSH_CNTL); 1801 topctrl_writel(priv, 0, TX_FLUSH_CNTL); 1802 } 1803 1804 static int bcm_sysport_change_mac(struct net_device *dev, void *p) 1805 { 1806 struct bcm_sysport_priv *priv = netdev_priv(dev); 1807 struct sockaddr *addr = p; 1808 1809 if (!is_valid_ether_addr(addr->sa_data)) 1810 return -EINVAL; 1811 1812 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); 1813 1814 /* interface is disabled, changes to MAC will be reflected on next 1815 * open call 1816 */ 1817 if (!netif_running(dev)) 1818 return 0; 1819 1820 umac_set_hw_addr(priv, dev->dev_addr); 1821 1822 return 0; 1823 } 1824 1825 static void bcm_sysport_get_stats64(struct net_device *dev, 1826 struct rtnl_link_stats64 *stats) 1827 { 1828 struct bcm_sysport_priv *priv = netdev_priv(dev); 1829 struct bcm_sysport_stats64 *stats64 = &priv->stats64; 1830 unsigned int start; 1831 1832 netdev_stats_to_stats64(stats, &dev->stats); 1833 1834 bcm_sysport_update_tx_stats(priv, &stats->tx_bytes, 1835 &stats->tx_packets); 1836 1837 do { 1838 start = u64_stats_fetch_begin_irq(&priv->syncp); 1839 stats->rx_packets = stats64->rx_packets; 1840 stats->rx_bytes = stats64->rx_bytes; 1841 } while (u64_stats_fetch_retry_irq(&priv->syncp, start)); 1842 } 1843 1844 static void bcm_sysport_netif_start(struct net_device *dev) 1845 { 1846 struct bcm_sysport_priv *priv = netdev_priv(dev); 1847 1848 /* Enable NAPI */ 1849 bcm_sysport_init_dim(priv, bcm_sysport_dim_work); 1850 bcm_sysport_init_rx_coalesce(priv); 1851 napi_enable(&priv->napi); 1852 1853 /* Enable RX interrupt and TX ring full interrupt */ 1854 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL); 1855 1856 phy_start(dev->phydev); 1857 1858 /* Enable TX interrupts for the TXQs */ 1859 if (!priv->is_lite) 1860 intrl2_1_mask_clear(priv, 0xffffffff); 1861 else 1862 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK); 1863 } 1864 1865 static void rbuf_init(struct bcm_sysport_priv *priv) 1866 { 1867 u32 reg; 1868 1869 reg = rbuf_readl(priv, RBUF_CONTROL); 1870 reg |= RBUF_4B_ALGN | RBUF_RSB_EN; 1871 /* Set a correct RSB format on SYSTEMPORT Lite */ 1872 if (priv->is_lite) 1873 reg &= ~RBUF_RSB_SWAP1; 1874 1875 /* Set a correct RSB format based on host endian */ 1876 if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)) 1877 reg |= RBUF_RSB_SWAP0; 1878 else 1879 reg &= ~RBUF_RSB_SWAP0; 1880 rbuf_writel(priv, reg, RBUF_CONTROL); 1881 } 1882 1883 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv) 1884 { 1885 intrl2_0_mask_set(priv, 0xffffffff); 1886 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); 1887 if (!priv->is_lite) { 1888 intrl2_1_mask_set(priv, 0xffffffff); 1889 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); 1890 } 1891 } 1892 1893 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv) 1894 { 1895 u32 reg; 1896 1897 reg = gib_readl(priv, GIB_CONTROL); 1898 /* Include Broadcom tag in pad extension and fix up IPG_LENGTH */ 1899 if (netdev_uses_dsa(priv->netdev)) { 1900 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT); 1901 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT; 1902 } 1903 reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT); 1904 reg |= 12 << GIB_IPG_LEN_SHIFT; 1905 gib_writel(priv, reg, GIB_CONTROL); 1906 } 1907 1908 static int bcm_sysport_open(struct net_device *dev) 1909 { 1910 struct bcm_sysport_priv *priv = netdev_priv(dev); 1911 struct phy_device *phydev; 1912 unsigned int i; 1913 int ret; 1914 1915 /* Reset UniMAC */ 1916 umac_reset(priv); 1917 1918 /* Flush TX and RX FIFOs at TOPCTRL level */ 1919 topctrl_flush(priv); 1920 1921 /* Disable the UniMAC RX/TX */ 1922 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0); 1923 1924 /* Enable RBUF 2bytes alignment and Receive Status Block */ 1925 rbuf_init(priv); 1926 1927 /* Set maximum frame length */ 1928 if (!priv->is_lite) 1929 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN); 1930 else 1931 gib_set_pad_extension(priv); 1932 1933 /* Apply features again in case we changed them while interface was 1934 * down 1935 */ 1936 bcm_sysport_set_features(dev, dev->features); 1937 1938 /* Set MAC address */ 1939 umac_set_hw_addr(priv, dev->dev_addr); 1940 1941 phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link, 1942 0, priv->phy_interface); 1943 if (!phydev) { 1944 netdev_err(dev, "could not attach to PHY\n"); 1945 return -ENODEV; 1946 } 1947 1948 /* Reset house keeping link status */ 1949 priv->old_duplex = -1; 1950 priv->old_link = -1; 1951 priv->old_pause = -1; 1952 1953 /* mask all interrupts and request them */ 1954 bcm_sysport_mask_all_intrs(priv); 1955 1956 ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev); 1957 if (ret) { 1958 netdev_err(dev, "failed to request RX interrupt\n"); 1959 goto out_phy_disconnect; 1960 } 1961 1962 if (!priv->is_lite) { 1963 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0, 1964 dev->name, dev); 1965 if (ret) { 1966 netdev_err(dev, "failed to request TX interrupt\n"); 1967 goto out_free_irq0; 1968 } 1969 } 1970 1971 /* Initialize both hardware and software ring */ 1972 for (i = 0; i < dev->num_tx_queues; i++) { 1973 ret = bcm_sysport_init_tx_ring(priv, i); 1974 if (ret) { 1975 netdev_err(dev, "failed to initialize TX ring %d\n", 1976 i); 1977 goto out_free_tx_ring; 1978 } 1979 } 1980 1981 /* Initialize linked-list */ 1982 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS); 1983 1984 /* Initialize RX ring */ 1985 ret = bcm_sysport_init_rx_ring(priv); 1986 if (ret) { 1987 netdev_err(dev, "failed to initialize RX ring\n"); 1988 goto out_free_rx_ring; 1989 } 1990 1991 /* Turn on RDMA */ 1992 ret = rdma_enable_set(priv, 1); 1993 if (ret) 1994 goto out_free_rx_ring; 1995 1996 /* Turn on TDMA */ 1997 ret = tdma_enable_set(priv, 1); 1998 if (ret) 1999 goto out_clear_rx_int; 2000 2001 /* Turn on UniMAC TX/RX */ 2002 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1); 2003 2004 bcm_sysport_netif_start(dev); 2005 2006 netif_tx_start_all_queues(dev); 2007 2008 return 0; 2009 2010 out_clear_rx_int: 2011 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL); 2012 out_free_rx_ring: 2013 bcm_sysport_fini_rx_ring(priv); 2014 out_free_tx_ring: 2015 for (i = 0; i < dev->num_tx_queues; i++) 2016 bcm_sysport_fini_tx_ring(priv, i); 2017 if (!priv->is_lite) 2018 free_irq(priv->irq1, dev); 2019 out_free_irq0: 2020 free_irq(priv->irq0, dev); 2021 out_phy_disconnect: 2022 phy_disconnect(phydev); 2023 return ret; 2024 } 2025 2026 static void bcm_sysport_netif_stop(struct net_device *dev) 2027 { 2028 struct bcm_sysport_priv *priv = netdev_priv(dev); 2029 2030 /* stop all software from updating hardware */ 2031 netif_tx_disable(dev); 2032 napi_disable(&priv->napi); 2033 cancel_work_sync(&priv->dim.dim.work); 2034 phy_stop(dev->phydev); 2035 2036 /* mask all interrupts */ 2037 bcm_sysport_mask_all_intrs(priv); 2038 } 2039 2040 static int bcm_sysport_stop(struct net_device *dev) 2041 { 2042 struct bcm_sysport_priv *priv = netdev_priv(dev); 2043 unsigned int i; 2044 int ret; 2045 2046 bcm_sysport_netif_stop(dev); 2047 2048 /* Disable UniMAC RX */ 2049 umac_enable_set(priv, CMD_RX_EN, 0); 2050 2051 ret = tdma_enable_set(priv, 0); 2052 if (ret) { 2053 netdev_err(dev, "timeout disabling RDMA\n"); 2054 return ret; 2055 } 2056 2057 /* Wait for a maximum packet size to be drained */ 2058 usleep_range(2000, 3000); 2059 2060 ret = rdma_enable_set(priv, 0); 2061 if (ret) { 2062 netdev_err(dev, "timeout disabling TDMA\n"); 2063 return ret; 2064 } 2065 2066 /* Disable UniMAC TX */ 2067 umac_enable_set(priv, CMD_TX_EN, 0); 2068 2069 /* Free RX/TX rings SW structures */ 2070 for (i = 0; i < dev->num_tx_queues; i++) 2071 bcm_sysport_fini_tx_ring(priv, i); 2072 bcm_sysport_fini_rx_ring(priv); 2073 2074 free_irq(priv->irq0, dev); 2075 if (!priv->is_lite) 2076 free_irq(priv->irq1, dev); 2077 2078 /* Disconnect from PHY */ 2079 phy_disconnect(dev->phydev); 2080 2081 return 0; 2082 } 2083 2084 static int bcm_sysport_rule_find(struct bcm_sysport_priv *priv, 2085 u64 location) 2086 { 2087 unsigned int index; 2088 u32 reg; 2089 2090 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) { 2091 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index)); 2092 reg >>= RXCHK_BRCM_TAG_CID_SHIFT; 2093 reg &= RXCHK_BRCM_TAG_CID_MASK; 2094 if (reg == location) 2095 return index; 2096 } 2097 2098 return -EINVAL; 2099 } 2100 2101 static int bcm_sysport_rule_get(struct bcm_sysport_priv *priv, 2102 struct ethtool_rxnfc *nfc) 2103 { 2104 int index; 2105 2106 /* This is not a rule that we know about */ 2107 index = bcm_sysport_rule_find(priv, nfc->fs.location); 2108 if (index < 0) 2109 return -EOPNOTSUPP; 2110 2111 nfc->fs.ring_cookie = RX_CLS_FLOW_WAKE; 2112 2113 return 0; 2114 } 2115 2116 static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv, 2117 struct ethtool_rxnfc *nfc) 2118 { 2119 unsigned int index; 2120 u32 reg; 2121 2122 /* We cannot match locations greater than what the classification ID 2123 * permits (256 entries) 2124 */ 2125 if (nfc->fs.location > RXCHK_BRCM_TAG_CID_MASK) 2126 return -E2BIG; 2127 2128 /* We cannot support flows that are not destined for a wake-up */ 2129 if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE) 2130 return -EOPNOTSUPP; 2131 2132 /* All filters are already in use, we cannot match more rules */ 2133 if (bitmap_weight(priv->filters, RXCHK_BRCM_TAG_MAX) == 2134 RXCHK_BRCM_TAG_MAX) 2135 return -ENOSPC; 2136 2137 index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX); 2138 if (index > RXCHK_BRCM_TAG_MAX) 2139 return -ENOSPC; 2140 2141 /* Location is the classification ID, and index is the position 2142 * within one of our 8 possible filters to be programmed 2143 */ 2144 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index)); 2145 reg &= ~(RXCHK_BRCM_TAG_CID_MASK << RXCHK_BRCM_TAG_CID_SHIFT); 2146 reg |= nfc->fs.location << RXCHK_BRCM_TAG_CID_SHIFT; 2147 rxchk_writel(priv, reg, RXCHK_BRCM_TAG(index)); 2148 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index)); 2149 2150 priv->filters_loc[index] = nfc->fs.location; 2151 set_bit(index, priv->filters); 2152 2153 return 0; 2154 } 2155 2156 static int bcm_sysport_rule_del(struct bcm_sysport_priv *priv, 2157 u64 location) 2158 { 2159 int index; 2160 2161 /* This is not a rule that we know about */ 2162 index = bcm_sysport_rule_find(priv, location); 2163 if (index < 0) 2164 return -EOPNOTSUPP; 2165 2166 /* No need to disable this filter if it was enabled, this will 2167 * be taken care of during suspend time by bcm_sysport_suspend_to_wol 2168 */ 2169 clear_bit(index, priv->filters); 2170 priv->filters_loc[index] = 0; 2171 2172 return 0; 2173 } 2174 2175 static int bcm_sysport_get_rxnfc(struct net_device *dev, 2176 struct ethtool_rxnfc *nfc, u32 *rule_locs) 2177 { 2178 struct bcm_sysport_priv *priv = netdev_priv(dev); 2179 int ret = -EOPNOTSUPP; 2180 2181 switch (nfc->cmd) { 2182 case ETHTOOL_GRXCLSRULE: 2183 ret = bcm_sysport_rule_get(priv, nfc); 2184 break; 2185 default: 2186 break; 2187 } 2188 2189 return ret; 2190 } 2191 2192 static int bcm_sysport_set_rxnfc(struct net_device *dev, 2193 struct ethtool_rxnfc *nfc) 2194 { 2195 struct bcm_sysport_priv *priv = netdev_priv(dev); 2196 int ret = -EOPNOTSUPP; 2197 2198 switch (nfc->cmd) { 2199 case ETHTOOL_SRXCLSRLINS: 2200 ret = bcm_sysport_rule_set(priv, nfc); 2201 break; 2202 case ETHTOOL_SRXCLSRLDEL: 2203 ret = bcm_sysport_rule_del(priv, nfc->fs.location); 2204 break; 2205 default: 2206 break; 2207 } 2208 2209 return ret; 2210 } 2211 2212 static const struct ethtool_ops bcm_sysport_ethtool_ops = { 2213 .get_drvinfo = bcm_sysport_get_drvinfo, 2214 .get_msglevel = bcm_sysport_get_msglvl, 2215 .set_msglevel = bcm_sysport_set_msglvl, 2216 .get_link = ethtool_op_get_link, 2217 .get_strings = bcm_sysport_get_strings, 2218 .get_ethtool_stats = bcm_sysport_get_stats, 2219 .get_sset_count = bcm_sysport_get_sset_count, 2220 .get_wol = bcm_sysport_get_wol, 2221 .set_wol = bcm_sysport_set_wol, 2222 .get_coalesce = bcm_sysport_get_coalesce, 2223 .set_coalesce = bcm_sysport_set_coalesce, 2224 .get_link_ksettings = phy_ethtool_get_link_ksettings, 2225 .set_link_ksettings = phy_ethtool_set_link_ksettings, 2226 .get_rxnfc = bcm_sysport_get_rxnfc, 2227 .set_rxnfc = bcm_sysport_set_rxnfc, 2228 }; 2229 2230 static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb, 2231 struct net_device *sb_dev) 2232 { 2233 struct bcm_sysport_priv *priv = netdev_priv(dev); 2234 u16 queue = skb_get_queue_mapping(skb); 2235 struct bcm_sysport_tx_ring *tx_ring; 2236 unsigned int q, port; 2237 2238 if (!netdev_uses_dsa(dev)) 2239 return netdev_pick_tx(dev, skb, NULL); 2240 2241 /* DSA tagging layer will have configured the correct queue */ 2242 q = BRCM_TAG_GET_QUEUE(queue); 2243 port = BRCM_TAG_GET_PORT(queue); 2244 tx_ring = priv->ring_map[q + port * priv->per_port_num_tx_queues]; 2245 2246 if (unlikely(!tx_ring)) 2247 return netdev_pick_tx(dev, skb, NULL); 2248 2249 return tx_ring->index; 2250 } 2251 2252 static const struct net_device_ops bcm_sysport_netdev_ops = { 2253 .ndo_start_xmit = bcm_sysport_xmit, 2254 .ndo_tx_timeout = bcm_sysport_tx_timeout, 2255 .ndo_open = bcm_sysport_open, 2256 .ndo_stop = bcm_sysport_stop, 2257 .ndo_set_features = bcm_sysport_set_features, 2258 .ndo_set_rx_mode = bcm_sysport_set_rx_mode, 2259 .ndo_set_mac_address = bcm_sysport_change_mac, 2260 #ifdef CONFIG_NET_POLL_CONTROLLER 2261 .ndo_poll_controller = bcm_sysport_poll_controller, 2262 #endif 2263 .ndo_get_stats64 = bcm_sysport_get_stats64, 2264 .ndo_select_queue = bcm_sysport_select_queue, 2265 }; 2266 2267 static int bcm_sysport_map_queues(struct notifier_block *nb, 2268 struct dsa_notifier_register_info *info) 2269 { 2270 struct bcm_sysport_tx_ring *ring; 2271 struct bcm_sysport_priv *priv; 2272 struct net_device *slave_dev; 2273 unsigned int num_tx_queues; 2274 unsigned int q, qp, port; 2275 struct net_device *dev; 2276 2277 priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier); 2278 if (priv->netdev != info->master) 2279 return 0; 2280 2281 dev = info->master; 2282 2283 /* We can't be setting up queue inspection for non directly attached 2284 * switches 2285 */ 2286 if (info->switch_number) 2287 return 0; 2288 2289 if (dev->netdev_ops != &bcm_sysport_netdev_ops) 2290 return 0; 2291 2292 port = info->port_number; 2293 slave_dev = info->info.dev; 2294 2295 /* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a 2296 * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of 2297 * per-port (slave_dev) network devices queue, we achieve just that. 2298 * This need to happen now before any slave network device is used such 2299 * it accurately reflects the number of real TX queues. 2300 */ 2301 if (priv->is_lite) 2302 netif_set_real_num_tx_queues(slave_dev, 2303 slave_dev->num_tx_queues / 2); 2304 2305 num_tx_queues = slave_dev->real_num_tx_queues; 2306 2307 if (priv->per_port_num_tx_queues && 2308 priv->per_port_num_tx_queues != num_tx_queues) 2309 netdev_warn(slave_dev, "asymmetric number of per-port queues\n"); 2310 2311 priv->per_port_num_tx_queues = num_tx_queues; 2312 2313 for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues; 2314 q++) { 2315 ring = &priv->tx_rings[q]; 2316 2317 if (ring->inspect) 2318 continue; 2319 2320 /* Just remember the mapping actual programming done 2321 * during bcm_sysport_init_tx_ring 2322 */ 2323 ring->switch_queue = qp; 2324 ring->switch_port = port; 2325 ring->inspect = true; 2326 priv->ring_map[qp + port * num_tx_queues] = ring; 2327 qp++; 2328 } 2329 2330 return 0; 2331 } 2332 2333 static int bcm_sysport_unmap_queues(struct notifier_block *nb, 2334 struct dsa_notifier_register_info *info) 2335 { 2336 struct bcm_sysport_tx_ring *ring; 2337 struct bcm_sysport_priv *priv; 2338 struct net_device *slave_dev; 2339 unsigned int num_tx_queues; 2340 struct net_device *dev; 2341 unsigned int q, qp, port; 2342 2343 priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier); 2344 if (priv->netdev != info->master) 2345 return 0; 2346 2347 dev = info->master; 2348 2349 if (dev->netdev_ops != &bcm_sysport_netdev_ops) 2350 return 0; 2351 2352 port = info->port_number; 2353 slave_dev = info->info.dev; 2354 2355 num_tx_queues = slave_dev->real_num_tx_queues; 2356 2357 for (q = 0; q < dev->num_tx_queues; q++) { 2358 ring = &priv->tx_rings[q]; 2359 2360 if (ring->switch_port != port) 2361 continue; 2362 2363 if (!ring->inspect) 2364 continue; 2365 2366 ring->inspect = false; 2367 qp = ring->switch_queue; 2368 priv->ring_map[qp + port * num_tx_queues] = NULL; 2369 } 2370 2371 return 0; 2372 } 2373 2374 static int bcm_sysport_dsa_notifier(struct notifier_block *nb, 2375 unsigned long event, void *ptr) 2376 { 2377 int ret = NOTIFY_DONE; 2378 2379 switch (event) { 2380 case DSA_PORT_REGISTER: 2381 ret = bcm_sysport_map_queues(nb, ptr); 2382 break; 2383 case DSA_PORT_UNREGISTER: 2384 ret = bcm_sysport_unmap_queues(nb, ptr); 2385 break; 2386 } 2387 2388 return notifier_from_errno(ret); 2389 } 2390 2391 #define REV_FMT "v%2x.%02x" 2392 2393 static const struct bcm_sysport_hw_params bcm_sysport_params[] = { 2394 [SYSTEMPORT] = { 2395 .is_lite = false, 2396 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS, 2397 }, 2398 [SYSTEMPORT_LITE] = { 2399 .is_lite = true, 2400 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS, 2401 }, 2402 }; 2403 2404 static const struct of_device_id bcm_sysport_of_match[] = { 2405 { .compatible = "brcm,systemportlite-v1.00", 2406 .data = &bcm_sysport_params[SYSTEMPORT_LITE] }, 2407 { .compatible = "brcm,systemport-v1.00", 2408 .data = &bcm_sysport_params[SYSTEMPORT] }, 2409 { .compatible = "brcm,systemport", 2410 .data = &bcm_sysport_params[SYSTEMPORT] }, 2411 { /* sentinel */ } 2412 }; 2413 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match); 2414 2415 static int bcm_sysport_probe(struct platform_device *pdev) 2416 { 2417 const struct bcm_sysport_hw_params *params; 2418 const struct of_device_id *of_id = NULL; 2419 struct bcm_sysport_priv *priv; 2420 struct device_node *dn; 2421 struct net_device *dev; 2422 const void *macaddr; 2423 u32 txq, rxq; 2424 int ret; 2425 2426 dn = pdev->dev.of_node; 2427 of_id = of_match_node(bcm_sysport_of_match, dn); 2428 if (!of_id || !of_id->data) 2429 return -EINVAL; 2430 2431 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40)); 2432 if (ret) 2433 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 2434 if (ret) { 2435 dev_err(&pdev->dev, "unable to set DMA mask: %d\n", ret); 2436 return ret; 2437 } 2438 2439 /* Fairly quickly we need to know the type of adapter we have */ 2440 params = of_id->data; 2441 2442 /* Read the Transmit/Receive Queue properties */ 2443 if (of_property_read_u32(dn, "systemport,num-txq", &txq)) 2444 txq = TDMA_NUM_RINGS; 2445 if (of_property_read_u32(dn, "systemport,num-rxq", &rxq)) 2446 rxq = 1; 2447 2448 /* Sanity check the number of transmit queues */ 2449 if (!txq || txq > TDMA_NUM_RINGS) 2450 return -EINVAL; 2451 2452 dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq); 2453 if (!dev) 2454 return -ENOMEM; 2455 2456 /* Initialize private members */ 2457 priv = netdev_priv(dev); 2458 2459 /* Allocate number of TX rings */ 2460 priv->tx_rings = devm_kcalloc(&pdev->dev, txq, 2461 sizeof(struct bcm_sysport_tx_ring), 2462 GFP_KERNEL); 2463 if (!priv->tx_rings) 2464 return -ENOMEM; 2465 2466 priv->is_lite = params->is_lite; 2467 priv->num_rx_desc_words = params->num_rx_desc_words; 2468 2469 priv->irq0 = platform_get_irq(pdev, 0); 2470 if (!priv->is_lite) { 2471 priv->irq1 = platform_get_irq(pdev, 1); 2472 priv->wol_irq = platform_get_irq(pdev, 2); 2473 } else { 2474 priv->wol_irq = platform_get_irq(pdev, 1); 2475 } 2476 if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) { 2477 dev_err(&pdev->dev, "invalid interrupts\n"); 2478 ret = -EINVAL; 2479 goto err_free_netdev; 2480 } 2481 2482 priv->base = devm_platform_ioremap_resource(pdev, 0); 2483 if (IS_ERR(priv->base)) { 2484 ret = PTR_ERR(priv->base); 2485 goto err_free_netdev; 2486 } 2487 2488 priv->netdev = dev; 2489 priv->pdev = pdev; 2490 2491 ret = of_get_phy_mode(dn, &priv->phy_interface); 2492 /* Default to GMII interface mode */ 2493 if (ret) 2494 priv->phy_interface = PHY_INTERFACE_MODE_GMII; 2495 2496 /* In the case of a fixed PHY, the DT node associated 2497 * to the PHY is the Ethernet MAC DT node. 2498 */ 2499 if (of_phy_is_fixed_link(dn)) { 2500 ret = of_phy_register_fixed_link(dn); 2501 if (ret) { 2502 dev_err(&pdev->dev, "failed to register fixed PHY\n"); 2503 goto err_free_netdev; 2504 } 2505 2506 priv->phy_dn = dn; 2507 } 2508 2509 /* Initialize netdevice members */ 2510 macaddr = of_get_mac_address(dn); 2511 if (IS_ERR(macaddr)) { 2512 dev_warn(&pdev->dev, "using random Ethernet MAC\n"); 2513 eth_hw_addr_random(dev); 2514 } else { 2515 ether_addr_copy(dev->dev_addr, macaddr); 2516 } 2517 2518 SET_NETDEV_DEV(dev, &pdev->dev); 2519 dev_set_drvdata(&pdev->dev, dev); 2520 dev->ethtool_ops = &bcm_sysport_ethtool_ops; 2521 dev->netdev_ops = &bcm_sysport_netdev_ops; 2522 netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64); 2523 2524 dev->features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA | 2525 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 2526 dev->hw_features |= dev->features; 2527 dev->vlan_features |= dev->features; 2528 2529 /* Request the WOL interrupt and advertise suspend if available */ 2530 priv->wol_irq_disabled = 1; 2531 ret = devm_request_irq(&pdev->dev, priv->wol_irq, 2532 bcm_sysport_wol_isr, 0, dev->name, priv); 2533 if (!ret) 2534 device_set_wakeup_capable(&pdev->dev, 1); 2535 2536 /* Set the needed headroom once and for all */ 2537 BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8); 2538 dev->needed_headroom += sizeof(struct bcm_tsb); 2539 2540 /* libphy will adjust the link state accordingly */ 2541 netif_carrier_off(dev); 2542 2543 priv->rx_max_coalesced_frames = 1; 2544 u64_stats_init(&priv->syncp); 2545 2546 priv->dsa_notifier.notifier_call = bcm_sysport_dsa_notifier; 2547 2548 ret = register_dsa_notifier(&priv->dsa_notifier); 2549 if (ret) { 2550 dev_err(&pdev->dev, "failed to register DSA notifier\n"); 2551 goto err_deregister_fixed_link; 2552 } 2553 2554 ret = register_netdev(dev); 2555 if (ret) { 2556 dev_err(&pdev->dev, "failed to register net_device\n"); 2557 goto err_deregister_notifier; 2558 } 2559 2560 priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK; 2561 dev_info(&pdev->dev, 2562 "Broadcom SYSTEMPORT%s " REV_FMT 2563 " (irqs: %d, %d, TXQs: %d, RXQs: %d)\n", 2564 priv->is_lite ? " Lite" : "", 2565 (priv->rev >> 8) & 0xff, priv->rev & 0xff, 2566 priv->irq0, priv->irq1, txq, rxq); 2567 2568 return 0; 2569 2570 err_deregister_notifier: 2571 unregister_dsa_notifier(&priv->dsa_notifier); 2572 err_deregister_fixed_link: 2573 if (of_phy_is_fixed_link(dn)) 2574 of_phy_deregister_fixed_link(dn); 2575 err_free_netdev: 2576 free_netdev(dev); 2577 return ret; 2578 } 2579 2580 static int bcm_sysport_remove(struct platform_device *pdev) 2581 { 2582 struct net_device *dev = dev_get_drvdata(&pdev->dev); 2583 struct bcm_sysport_priv *priv = netdev_priv(dev); 2584 struct device_node *dn = pdev->dev.of_node; 2585 2586 /* Not much to do, ndo_close has been called 2587 * and we use managed allocations 2588 */ 2589 unregister_dsa_notifier(&priv->dsa_notifier); 2590 unregister_netdev(dev); 2591 if (of_phy_is_fixed_link(dn)) 2592 of_phy_deregister_fixed_link(dn); 2593 free_netdev(dev); 2594 dev_set_drvdata(&pdev->dev, NULL); 2595 2596 return 0; 2597 } 2598 2599 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv) 2600 { 2601 struct net_device *ndev = priv->netdev; 2602 unsigned int timeout = 1000; 2603 unsigned int index, i = 0; 2604 u32 reg; 2605 2606 reg = umac_readl(priv, UMAC_MPD_CTRL); 2607 if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE)) 2608 reg |= MPD_EN; 2609 reg &= ~PSW_EN; 2610 if (priv->wolopts & WAKE_MAGICSECURE) { 2611 /* Program the SecureOn password */ 2612 umac_writel(priv, get_unaligned_be16(&priv->sopass[0]), 2613 UMAC_PSW_MS); 2614 umac_writel(priv, get_unaligned_be32(&priv->sopass[2]), 2615 UMAC_PSW_LS); 2616 reg |= PSW_EN; 2617 } 2618 umac_writel(priv, reg, UMAC_MPD_CTRL); 2619 2620 if (priv->wolopts & WAKE_FILTER) { 2621 /* Turn on ACPI matching to steal packets from RBUF */ 2622 reg = rbuf_readl(priv, RBUF_CONTROL); 2623 if (priv->is_lite) 2624 reg |= RBUF_ACPI_EN_LITE; 2625 else 2626 reg |= RBUF_ACPI_EN; 2627 rbuf_writel(priv, reg, RBUF_CONTROL); 2628 2629 /* Enable RXCHK, active filters and Broadcom tag matching */ 2630 reg = rxchk_readl(priv, RXCHK_CONTROL); 2631 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK << 2632 RXCHK_BRCM_TAG_MATCH_SHIFT); 2633 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) { 2634 reg |= BIT(RXCHK_BRCM_TAG_MATCH_SHIFT + i); 2635 i++; 2636 } 2637 reg |= RXCHK_EN | RXCHK_BRCM_TAG_EN; 2638 rxchk_writel(priv, reg, RXCHK_CONTROL); 2639 } 2640 2641 /* Make sure RBUF entered WoL mode as result */ 2642 do { 2643 reg = rbuf_readl(priv, RBUF_STATUS); 2644 if (reg & RBUF_WOL_MODE) 2645 break; 2646 2647 udelay(10); 2648 } while (timeout-- > 0); 2649 2650 /* Do not leave the UniMAC RBUF matching only MPD packets */ 2651 if (!timeout) { 2652 mpd_enable_set(priv, false); 2653 netif_err(priv, wol, ndev, "failed to enter WOL mode\n"); 2654 return -ETIMEDOUT; 2655 } 2656 2657 /* UniMAC receive needs to be turned on */ 2658 umac_enable_set(priv, CMD_RX_EN, 1); 2659 2660 netif_dbg(priv, wol, ndev, "entered WOL mode\n"); 2661 2662 return 0; 2663 } 2664 2665 static int __maybe_unused bcm_sysport_suspend(struct device *d) 2666 { 2667 struct net_device *dev = dev_get_drvdata(d); 2668 struct bcm_sysport_priv *priv = netdev_priv(dev); 2669 unsigned int i; 2670 int ret = 0; 2671 u32 reg; 2672 2673 if (!netif_running(dev)) 2674 return 0; 2675 2676 netif_device_detach(dev); 2677 2678 bcm_sysport_netif_stop(dev); 2679 2680 phy_suspend(dev->phydev); 2681 2682 /* Disable UniMAC RX */ 2683 umac_enable_set(priv, CMD_RX_EN, 0); 2684 2685 ret = rdma_enable_set(priv, 0); 2686 if (ret) { 2687 netdev_err(dev, "RDMA timeout!\n"); 2688 return ret; 2689 } 2690 2691 /* Disable RXCHK if enabled */ 2692 if (priv->rx_chk_en) { 2693 reg = rxchk_readl(priv, RXCHK_CONTROL); 2694 reg &= ~RXCHK_EN; 2695 rxchk_writel(priv, reg, RXCHK_CONTROL); 2696 } 2697 2698 /* Flush RX pipe */ 2699 if (!priv->wolopts) 2700 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL); 2701 2702 ret = tdma_enable_set(priv, 0); 2703 if (ret) { 2704 netdev_err(dev, "TDMA timeout!\n"); 2705 return ret; 2706 } 2707 2708 /* Wait for a packet boundary */ 2709 usleep_range(2000, 3000); 2710 2711 umac_enable_set(priv, CMD_TX_EN, 0); 2712 2713 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL); 2714 2715 /* Free RX/TX rings SW structures */ 2716 for (i = 0; i < dev->num_tx_queues; i++) 2717 bcm_sysport_fini_tx_ring(priv, i); 2718 bcm_sysport_fini_rx_ring(priv); 2719 2720 /* Get prepared for Wake-on-LAN */ 2721 if (device_may_wakeup(d) && priv->wolopts) 2722 ret = bcm_sysport_suspend_to_wol(priv); 2723 2724 return ret; 2725 } 2726 2727 static int __maybe_unused bcm_sysport_resume(struct device *d) 2728 { 2729 struct net_device *dev = dev_get_drvdata(d); 2730 struct bcm_sysport_priv *priv = netdev_priv(dev); 2731 unsigned int i; 2732 int ret; 2733 2734 if (!netif_running(dev)) 2735 return 0; 2736 2737 umac_reset(priv); 2738 2739 /* Disable the UniMAC RX/TX */ 2740 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0); 2741 2742 /* We may have been suspended and never received a WOL event that 2743 * would turn off MPD detection, take care of that now 2744 */ 2745 bcm_sysport_resume_from_wol(priv); 2746 2747 /* Initialize both hardware and software ring */ 2748 for (i = 0; i < dev->num_tx_queues; i++) { 2749 ret = bcm_sysport_init_tx_ring(priv, i); 2750 if (ret) { 2751 netdev_err(dev, "failed to initialize TX ring %d\n", 2752 i); 2753 goto out_free_tx_rings; 2754 } 2755 } 2756 2757 /* Initialize linked-list */ 2758 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS); 2759 2760 /* Initialize RX ring */ 2761 ret = bcm_sysport_init_rx_ring(priv); 2762 if (ret) { 2763 netdev_err(dev, "failed to initialize RX ring\n"); 2764 goto out_free_rx_ring; 2765 } 2766 2767 /* RX pipe enable */ 2768 topctrl_writel(priv, 0, RX_FLUSH_CNTL); 2769 2770 ret = rdma_enable_set(priv, 1); 2771 if (ret) { 2772 netdev_err(dev, "failed to enable RDMA\n"); 2773 goto out_free_rx_ring; 2774 } 2775 2776 /* Restore enabled features */ 2777 bcm_sysport_set_features(dev, dev->features); 2778 2779 rbuf_init(priv); 2780 2781 /* Set maximum frame length */ 2782 if (!priv->is_lite) 2783 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN); 2784 else 2785 gib_set_pad_extension(priv); 2786 2787 /* Set MAC address */ 2788 umac_set_hw_addr(priv, dev->dev_addr); 2789 2790 umac_enable_set(priv, CMD_RX_EN, 1); 2791 2792 /* TX pipe enable */ 2793 topctrl_writel(priv, 0, TX_FLUSH_CNTL); 2794 2795 umac_enable_set(priv, CMD_TX_EN, 1); 2796 2797 ret = tdma_enable_set(priv, 1); 2798 if (ret) { 2799 netdev_err(dev, "TDMA timeout!\n"); 2800 goto out_free_rx_ring; 2801 } 2802 2803 phy_resume(dev->phydev); 2804 2805 bcm_sysport_netif_start(dev); 2806 2807 netif_device_attach(dev); 2808 2809 return 0; 2810 2811 out_free_rx_ring: 2812 bcm_sysport_fini_rx_ring(priv); 2813 out_free_tx_rings: 2814 for (i = 0; i < dev->num_tx_queues; i++) 2815 bcm_sysport_fini_tx_ring(priv, i); 2816 return ret; 2817 } 2818 2819 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops, 2820 bcm_sysport_suspend, bcm_sysport_resume); 2821 2822 static struct platform_driver bcm_sysport_driver = { 2823 .probe = bcm_sysport_probe, 2824 .remove = bcm_sysport_remove, 2825 .driver = { 2826 .name = "brcm-systemport", 2827 .of_match_table = bcm_sysport_of_match, 2828 .pm = &bcm_sysport_pm_ops, 2829 }, 2830 }; 2831 module_platform_driver(bcm_sysport_driver); 2832 2833 MODULE_AUTHOR("Broadcom Corporation"); 2834 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver"); 2835 MODULE_ALIAS("platform:brcm-systemport"); 2836 MODULE_LICENSE("GPL"); 2837