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/dsa/brcm.h> 16 #include <linux/etherdevice.h> 17 #include <linux/platform_device.h> 18 #include <linux/of.h> 19 #include <linux/of_net.h> 20 #include <linux/of_mdio.h> 21 #include <linux/phy.h> 22 #include <linux/phy_fixed.h> 23 #include <net/dsa.h> 24 #include <linux/clk.h> 25 #include <net/ip.h> 26 #include <net/ipv6.h> 27 28 #include "bcmsysport.h" 29 30 /* I/O accessors register helpers */ 31 #define BCM_SYSPORT_IO_MACRO(name, offset) \ 32 static inline u32 name##_readl(struct bcm_sysport_priv *priv, u32 off) \ 33 { \ 34 u32 reg = readl_relaxed(priv->base + offset + off); \ 35 return reg; \ 36 } \ 37 static inline void name##_writel(struct bcm_sysport_priv *priv, \ 38 u32 val, u32 off) \ 39 { \ 40 writel_relaxed(val, priv->base + offset + off); \ 41 } \ 42 43 BCM_SYSPORT_IO_MACRO(intrl2_0, SYS_PORT_INTRL2_0_OFFSET); 44 BCM_SYSPORT_IO_MACRO(intrl2_1, SYS_PORT_INTRL2_1_OFFSET); 45 BCM_SYSPORT_IO_MACRO(umac, SYS_PORT_UMAC_OFFSET); 46 BCM_SYSPORT_IO_MACRO(gib, SYS_PORT_GIB_OFFSET); 47 BCM_SYSPORT_IO_MACRO(tdma, SYS_PORT_TDMA_OFFSET); 48 BCM_SYSPORT_IO_MACRO(rxchk, SYS_PORT_RXCHK_OFFSET); 49 BCM_SYSPORT_IO_MACRO(txchk, SYS_PORT_TXCHK_OFFSET); 50 BCM_SYSPORT_IO_MACRO(rbuf, SYS_PORT_RBUF_OFFSET); 51 BCM_SYSPORT_IO_MACRO(tbuf, SYS_PORT_TBUF_OFFSET); 52 BCM_SYSPORT_IO_MACRO(topctrl, SYS_PORT_TOPCTRL_OFFSET); 53 54 /* On SYSTEMPORT Lite, any register after RDMA_STATUS has the exact 55 * same layout, except it has been moved by 4 bytes up, *sigh* 56 */ 57 static inline u32 rdma_readl(struct bcm_sysport_priv *priv, u32 off) 58 { 59 if (priv->is_lite && off >= RDMA_STATUS) 60 off += 4; 61 return readl_relaxed(priv->base + SYS_PORT_RDMA_OFFSET + off); 62 } 63 64 static inline void rdma_writel(struct bcm_sysport_priv *priv, u32 val, u32 off) 65 { 66 if (priv->is_lite && off >= RDMA_STATUS) 67 off += 4; 68 writel_relaxed(val, priv->base + SYS_PORT_RDMA_OFFSET + off); 69 } 70 71 static inline u32 tdma_control_bit(struct bcm_sysport_priv *priv, u32 bit) 72 { 73 if (!priv->is_lite) { 74 return BIT(bit); 75 } else { 76 if (bit >= ACB_ALGO) 77 return BIT(bit + 1); 78 else 79 return BIT(bit); 80 } 81 } 82 83 /* L2-interrupt masking/unmasking helpers, does automatic saving of the applied 84 * mask in a software copy to avoid CPU_MASK_STATUS reads in hot-paths. 85 */ 86 #define BCM_SYSPORT_INTR_L2(which) \ 87 static inline void intrl2_##which##_mask_clear(struct bcm_sysport_priv *priv, \ 88 u32 mask) \ 89 { \ 90 priv->irq##which##_mask &= ~(mask); \ 91 intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR); \ 92 } \ 93 static inline void intrl2_##which##_mask_set(struct bcm_sysport_priv *priv, \ 94 u32 mask) \ 95 { \ 96 intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET); \ 97 priv->irq##which##_mask |= (mask); \ 98 } \ 99 100 BCM_SYSPORT_INTR_L2(0) 101 BCM_SYSPORT_INTR_L2(1) 102 103 /* Register accesses to GISB/RBUS registers are expensive (few hundred 104 * nanoseconds), so keep the check for 64-bits explicit here to save 105 * one register write per-packet on 32-bits platforms. 106 */ 107 static inline void dma_desc_set_addr(struct bcm_sysport_priv *priv, 108 void __iomem *d, 109 dma_addr_t addr) 110 { 111 #ifdef CONFIG_PHYS_ADDR_T_64BIT 112 writel_relaxed(upper_32_bits(addr) & DESC_ADDR_HI_MASK, 113 d + DESC_ADDR_HI_STATUS_LEN); 114 #endif 115 writel_relaxed(lower_32_bits(addr), d + DESC_ADDR_LO); 116 } 117 118 /* Ethtool operations */ 119 static void bcm_sysport_set_rx_csum(struct net_device *dev, 120 netdev_features_t wanted) 121 { 122 struct bcm_sysport_priv *priv = netdev_priv(dev); 123 u32 reg; 124 125 priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM); 126 reg = rxchk_readl(priv, RXCHK_CONTROL); 127 /* Clear L2 header checks, which would prevent BPDUs 128 * from being received. 129 */ 130 reg &= ~RXCHK_L2_HDR_DIS; 131 if (priv->rx_chk_en) 132 reg |= RXCHK_EN; 133 else 134 reg &= ~RXCHK_EN; 135 136 /* If UniMAC forwards CRC, we need to skip over it to get 137 * a valid CHK bit to be set in the per-packet status word 138 */ 139 if (priv->rx_chk_en && priv->crc_fwd) 140 reg |= RXCHK_SKIP_FCS; 141 else 142 reg &= ~RXCHK_SKIP_FCS; 143 144 /* If Broadcom tags are enabled (e.g: using a switch), make 145 * sure we tell the RXCHK hardware to expect a 4-bytes Broadcom 146 * tag after the Ethernet MAC Source Address. 147 */ 148 if (netdev_uses_dsa(dev)) 149 reg |= RXCHK_BRCM_TAG_EN; 150 else 151 reg &= ~RXCHK_BRCM_TAG_EN; 152 153 rxchk_writel(priv, reg, RXCHK_CONTROL); 154 } 155 156 static void bcm_sysport_set_tx_csum(struct net_device *dev, 157 netdev_features_t wanted) 158 { 159 struct bcm_sysport_priv *priv = netdev_priv(dev); 160 u32 reg; 161 162 /* Hardware transmit checksum requires us to enable the Transmit status 163 * block prepended to the packet contents 164 */ 165 priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 166 NETIF_F_HW_VLAN_CTAG_TX)); 167 reg = tdma_readl(priv, TDMA_CONTROL); 168 if (priv->tsb_en) 169 reg |= tdma_control_bit(priv, TSB_EN); 170 else 171 reg &= ~tdma_control_bit(priv, TSB_EN); 172 /* Indicating that software inserts Broadcom tags is needed for the TX 173 * checksum to be computed correctly when using VLAN HW acceleration, 174 * else it has no effect, so it can always be turned on. 175 */ 176 if (netdev_uses_dsa(dev)) 177 reg |= tdma_control_bit(priv, SW_BRCM_TAG); 178 else 179 reg &= ~tdma_control_bit(priv, SW_BRCM_TAG); 180 tdma_writel(priv, reg, TDMA_CONTROL); 181 182 /* Default TPID is ETH_P_8021AD, change to ETH_P_8021Q */ 183 if (wanted & NETIF_F_HW_VLAN_CTAG_TX) 184 tdma_writel(priv, ETH_P_8021Q, TDMA_TPID); 185 } 186 187 static int bcm_sysport_set_features(struct net_device *dev, 188 netdev_features_t features) 189 { 190 struct bcm_sysport_priv *priv = netdev_priv(dev); 191 int ret; 192 193 ret = clk_prepare_enable(priv->clk); 194 if (ret) 195 return ret; 196 197 /* Read CRC forward */ 198 if (!priv->is_lite) 199 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD); 200 else 201 priv->crc_fwd = !((gib_readl(priv, GIB_CONTROL) & 202 GIB_FCS_STRIP) >> GIB_FCS_STRIP_SHIFT); 203 204 bcm_sysport_set_rx_csum(dev, features); 205 bcm_sysport_set_tx_csum(dev, features); 206 207 clk_disable_unprepare(priv->clk); 208 209 return 0; 210 } 211 212 /* Hardware counters must be kept in sync because the order/offset 213 * is important here (order in structure declaration = order in hardware) 214 */ 215 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = { 216 /* general stats */ 217 STAT_NETDEV64(rx_packets), 218 STAT_NETDEV64(tx_packets), 219 STAT_NETDEV64(rx_bytes), 220 STAT_NETDEV64(tx_bytes), 221 STAT_NETDEV(rx_errors), 222 STAT_NETDEV(tx_errors), 223 STAT_NETDEV(rx_dropped), 224 STAT_NETDEV(tx_dropped), 225 STAT_NETDEV(multicast), 226 /* UniMAC RSV counters */ 227 STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64), 228 STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127), 229 STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255), 230 STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511), 231 STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023), 232 STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518), 233 STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv), 234 STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047), 235 STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095), 236 STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216), 237 STAT_MIB_RX("rx_pkts", mib.rx.pkt), 238 STAT_MIB_RX("rx_bytes", mib.rx.bytes), 239 STAT_MIB_RX("rx_multicast", mib.rx.mca), 240 STAT_MIB_RX("rx_broadcast", mib.rx.bca), 241 STAT_MIB_RX("rx_fcs", mib.rx.fcs), 242 STAT_MIB_RX("rx_control", mib.rx.cf), 243 STAT_MIB_RX("rx_pause", mib.rx.pf), 244 STAT_MIB_RX("rx_unknown", mib.rx.uo), 245 STAT_MIB_RX("rx_align", mib.rx.aln), 246 STAT_MIB_RX("rx_outrange", mib.rx.flr), 247 STAT_MIB_RX("rx_code", mib.rx.cde), 248 STAT_MIB_RX("rx_carrier", mib.rx.fcr), 249 STAT_MIB_RX("rx_oversize", mib.rx.ovr), 250 STAT_MIB_RX("rx_jabber", mib.rx.jbr), 251 STAT_MIB_RX("rx_mtu_err", mib.rx.mtue), 252 STAT_MIB_RX("rx_good_pkts", mib.rx.pok), 253 STAT_MIB_RX("rx_unicast", mib.rx.uc), 254 STAT_MIB_RX("rx_ppp", mib.rx.ppp), 255 STAT_MIB_RX("rx_crc", mib.rx.rcrc), 256 /* UniMAC TSV counters */ 257 STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64), 258 STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127), 259 STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255), 260 STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511), 261 STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023), 262 STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518), 263 STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv), 264 STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047), 265 STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095), 266 STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216), 267 STAT_MIB_TX("tx_pkts", mib.tx.pkts), 268 STAT_MIB_TX("tx_multicast", mib.tx.mca), 269 STAT_MIB_TX("tx_broadcast", mib.tx.bca), 270 STAT_MIB_TX("tx_pause", mib.tx.pf), 271 STAT_MIB_TX("tx_control", mib.tx.cf), 272 STAT_MIB_TX("tx_fcs_err", mib.tx.fcs), 273 STAT_MIB_TX("tx_oversize", mib.tx.ovr), 274 STAT_MIB_TX("tx_defer", mib.tx.drf), 275 STAT_MIB_TX("tx_excess_defer", mib.tx.edf), 276 STAT_MIB_TX("tx_single_col", mib.tx.scl), 277 STAT_MIB_TX("tx_multi_col", mib.tx.mcl), 278 STAT_MIB_TX("tx_late_col", mib.tx.lcl), 279 STAT_MIB_TX("tx_excess_col", mib.tx.ecl), 280 STAT_MIB_TX("tx_frags", mib.tx.frg), 281 STAT_MIB_TX("tx_total_col", mib.tx.ncl), 282 STAT_MIB_TX("tx_jabber", mib.tx.jbr), 283 STAT_MIB_TX("tx_bytes", mib.tx.bytes), 284 STAT_MIB_TX("tx_good_pkts", mib.tx.pok), 285 STAT_MIB_TX("tx_unicast", mib.tx.uc), 286 /* UniMAC RUNT counters */ 287 STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt), 288 STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs), 289 STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align), 290 STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes), 291 /* RXCHK misc statistics */ 292 STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR), 293 STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc, 294 RXCHK_OTHER_DISC_CNTR), 295 /* RBUF misc statistics */ 296 STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR), 297 STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR), 298 STAT_MIB_SOFT("alloc_rx_buff_failed", mib.alloc_rx_buff_failed), 299 STAT_MIB_SOFT("rx_dma_failed", mib.rx_dma_failed), 300 STAT_MIB_SOFT("tx_dma_failed", mib.tx_dma_failed), 301 STAT_MIB_SOFT("tx_realloc_tsb", mib.tx_realloc_tsb), 302 STAT_MIB_SOFT("tx_realloc_tsb_failed", mib.tx_realloc_tsb_failed), 303 /* Per TX-queue statistics are dynamically appended */ 304 }; 305 306 #define BCM_SYSPORT_STATS_LEN ARRAY_SIZE(bcm_sysport_gstrings_stats) 307 308 static void bcm_sysport_get_drvinfo(struct net_device *dev, 309 struct ethtool_drvinfo *info) 310 { 311 strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); 312 strlcpy(info->bus_info, "platform", sizeof(info->bus_info)); 313 } 314 315 static u32 bcm_sysport_get_msglvl(struct net_device *dev) 316 { 317 struct bcm_sysport_priv *priv = netdev_priv(dev); 318 319 return priv->msg_enable; 320 } 321 322 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable) 323 { 324 struct bcm_sysport_priv *priv = netdev_priv(dev); 325 326 priv->msg_enable = enable; 327 } 328 329 static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type) 330 { 331 switch (type) { 332 case BCM_SYSPORT_STAT_NETDEV: 333 case BCM_SYSPORT_STAT_NETDEV64: 334 case BCM_SYSPORT_STAT_RXCHK: 335 case BCM_SYSPORT_STAT_RBUF: 336 case BCM_SYSPORT_STAT_SOFT: 337 return true; 338 default: 339 return false; 340 } 341 } 342 343 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set) 344 { 345 struct bcm_sysport_priv *priv = netdev_priv(dev); 346 const struct bcm_sysport_stats *s; 347 unsigned int i, j; 348 349 switch (string_set) { 350 case ETH_SS_STATS: 351 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) { 352 s = &bcm_sysport_gstrings_stats[i]; 353 if (priv->is_lite && 354 !bcm_sysport_lite_stat_valid(s->type)) 355 continue; 356 j++; 357 } 358 /* Include per-queue statistics */ 359 return j + dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT; 360 default: 361 return -EOPNOTSUPP; 362 } 363 } 364 365 static void bcm_sysport_get_strings(struct net_device *dev, 366 u32 stringset, u8 *data) 367 { 368 struct bcm_sysport_priv *priv = netdev_priv(dev); 369 const struct bcm_sysport_stats *s; 370 char buf[128]; 371 int i, j; 372 373 switch (stringset) { 374 case ETH_SS_STATS: 375 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) { 376 s = &bcm_sysport_gstrings_stats[i]; 377 if (priv->is_lite && 378 !bcm_sysport_lite_stat_valid(s->type)) 379 continue; 380 381 memcpy(data + j * ETH_GSTRING_LEN, s->stat_string, 382 ETH_GSTRING_LEN); 383 j++; 384 } 385 386 for (i = 0; i < dev->num_tx_queues; i++) { 387 snprintf(buf, sizeof(buf), "txq%d_packets", i); 388 memcpy(data + j * ETH_GSTRING_LEN, buf, 389 ETH_GSTRING_LEN); 390 j++; 391 392 snprintf(buf, sizeof(buf), "txq%d_bytes", i); 393 memcpy(data + j * ETH_GSTRING_LEN, buf, 394 ETH_GSTRING_LEN); 395 j++; 396 } 397 break; 398 default: 399 break; 400 } 401 } 402 403 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv) 404 { 405 int i, j = 0; 406 407 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) { 408 const struct bcm_sysport_stats *s; 409 u8 offset = 0; 410 u32 val = 0; 411 char *p; 412 413 s = &bcm_sysport_gstrings_stats[i]; 414 switch (s->type) { 415 case BCM_SYSPORT_STAT_NETDEV: 416 case BCM_SYSPORT_STAT_NETDEV64: 417 case BCM_SYSPORT_STAT_SOFT: 418 continue; 419 case BCM_SYSPORT_STAT_MIB_RX: 420 case BCM_SYSPORT_STAT_MIB_TX: 421 case BCM_SYSPORT_STAT_RUNT: 422 if (priv->is_lite) 423 continue; 424 425 if (s->type != BCM_SYSPORT_STAT_MIB_RX) 426 offset = UMAC_MIB_STAT_OFFSET; 427 val = umac_readl(priv, UMAC_MIB_START + j + offset); 428 break; 429 case BCM_SYSPORT_STAT_RXCHK: 430 val = rxchk_readl(priv, s->reg_offset); 431 if (val == ~0) 432 rxchk_writel(priv, 0, s->reg_offset); 433 break; 434 case BCM_SYSPORT_STAT_RBUF: 435 val = rbuf_readl(priv, s->reg_offset); 436 if (val == ~0) 437 rbuf_writel(priv, 0, s->reg_offset); 438 break; 439 } 440 441 j += s->stat_sizeof; 442 p = (char *)priv + s->stat_offset; 443 *(u32 *)p = val; 444 } 445 446 netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n"); 447 } 448 449 static void bcm_sysport_update_tx_stats(struct bcm_sysport_priv *priv, 450 u64 *tx_bytes, u64 *tx_packets) 451 { 452 struct bcm_sysport_tx_ring *ring; 453 u64 bytes = 0, packets = 0; 454 unsigned int start; 455 unsigned int q; 456 457 for (q = 0; q < priv->netdev->num_tx_queues; q++) { 458 ring = &priv->tx_rings[q]; 459 do { 460 start = u64_stats_fetch_begin_irq(&priv->syncp); 461 bytes = ring->bytes; 462 packets = ring->packets; 463 } while (u64_stats_fetch_retry_irq(&priv->syncp, start)); 464 465 *tx_bytes += bytes; 466 *tx_packets += packets; 467 } 468 } 469 470 static void bcm_sysport_get_stats(struct net_device *dev, 471 struct ethtool_stats *stats, u64 *data) 472 { 473 struct bcm_sysport_priv *priv = netdev_priv(dev); 474 struct bcm_sysport_stats64 *stats64 = &priv->stats64; 475 struct u64_stats_sync *syncp = &priv->syncp; 476 struct bcm_sysport_tx_ring *ring; 477 u64 tx_bytes = 0, tx_packets = 0; 478 unsigned int start; 479 int i, j; 480 481 if (netif_running(dev)) { 482 bcm_sysport_update_mib_counters(priv); 483 bcm_sysport_update_tx_stats(priv, &tx_bytes, &tx_packets); 484 stats64->tx_bytes = tx_bytes; 485 stats64->tx_packets = tx_packets; 486 } 487 488 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) { 489 const struct bcm_sysport_stats *s; 490 char *p; 491 492 s = &bcm_sysport_gstrings_stats[i]; 493 if (s->type == BCM_SYSPORT_STAT_NETDEV) 494 p = (char *)&dev->stats; 495 else if (s->type == BCM_SYSPORT_STAT_NETDEV64) 496 p = (char *)stats64; 497 else 498 p = (char *)priv; 499 500 if (priv->is_lite && !bcm_sysport_lite_stat_valid(s->type)) 501 continue; 502 p += s->stat_offset; 503 504 if (s->stat_sizeof == sizeof(u64) && 505 s->type == BCM_SYSPORT_STAT_NETDEV64) { 506 do { 507 start = u64_stats_fetch_begin_irq(syncp); 508 data[i] = *(u64 *)p; 509 } while (u64_stats_fetch_retry_irq(syncp, start)); 510 } else 511 data[i] = *(u32 *)p; 512 j++; 513 } 514 515 /* For SYSTEMPORT Lite since we have holes in our statistics, j would 516 * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it 517 * needs to point to how many total statistics we have minus the 518 * number of per TX queue statistics 519 */ 520 j = bcm_sysport_get_sset_count(dev, ETH_SS_STATS) - 521 dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT; 522 523 for (i = 0; i < dev->num_tx_queues; i++) { 524 ring = &priv->tx_rings[i]; 525 data[j] = ring->packets; 526 j++; 527 data[j] = ring->bytes; 528 j++; 529 } 530 } 531 532 static void bcm_sysport_get_wol(struct net_device *dev, 533 struct ethtool_wolinfo *wol) 534 { 535 struct bcm_sysport_priv *priv = netdev_priv(dev); 536 537 wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER; 538 wol->wolopts = priv->wolopts; 539 540 if (!(priv->wolopts & WAKE_MAGICSECURE)) 541 return; 542 543 memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass)); 544 } 545 546 static int bcm_sysport_set_wol(struct net_device *dev, 547 struct ethtool_wolinfo *wol) 548 { 549 struct bcm_sysport_priv *priv = netdev_priv(dev); 550 struct device *kdev = &priv->pdev->dev; 551 u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER; 552 553 if (!device_can_wakeup(kdev)) 554 return -ENOTSUPP; 555 556 if (wol->wolopts & ~supported) 557 return -EINVAL; 558 559 if (wol->wolopts & WAKE_MAGICSECURE) 560 memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass)); 561 562 /* Flag the device and relevant IRQ as wakeup capable */ 563 if (wol->wolopts) { 564 device_set_wakeup_enable(kdev, 1); 565 if (priv->wol_irq_disabled) 566 enable_irq_wake(priv->wol_irq); 567 priv->wol_irq_disabled = 0; 568 } else { 569 device_set_wakeup_enable(kdev, 0); 570 /* Avoid unbalanced disable_irq_wake calls */ 571 if (!priv->wol_irq_disabled) 572 disable_irq_wake(priv->wol_irq); 573 priv->wol_irq_disabled = 1; 574 } 575 576 priv->wolopts = wol->wolopts; 577 578 return 0; 579 } 580 581 static void bcm_sysport_set_rx_coalesce(struct bcm_sysport_priv *priv, 582 u32 usecs, u32 pkts) 583 { 584 u32 reg; 585 586 reg = rdma_readl(priv, RDMA_MBDONE_INTR); 587 reg &= ~(RDMA_INTR_THRESH_MASK | 588 RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT); 589 reg |= pkts; 590 reg |= DIV_ROUND_UP(usecs * 1000, 8192) << RDMA_TIMEOUT_SHIFT; 591 rdma_writel(priv, reg, RDMA_MBDONE_INTR); 592 } 593 594 static void bcm_sysport_set_tx_coalesce(struct bcm_sysport_tx_ring *ring, 595 struct ethtool_coalesce *ec) 596 { 597 struct bcm_sysport_priv *priv = ring->priv; 598 u32 reg; 599 600 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(ring->index)); 601 reg &= ~(RING_INTR_THRESH_MASK | 602 RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT); 603 reg |= ec->tx_max_coalesced_frames; 604 reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) << 605 RING_TIMEOUT_SHIFT; 606 tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(ring->index)); 607 } 608 609 static int bcm_sysport_get_coalesce(struct net_device *dev, 610 struct ethtool_coalesce *ec, 611 struct kernel_ethtool_coalesce *kernel_coal, 612 struct netlink_ext_ack *extack) 613 { 614 struct bcm_sysport_priv *priv = netdev_priv(dev); 615 u32 reg; 616 617 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0)); 618 619 ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000; 620 ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK; 621 622 reg = rdma_readl(priv, RDMA_MBDONE_INTR); 623 624 ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000; 625 ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK; 626 ec->use_adaptive_rx_coalesce = priv->dim.use_dim; 627 628 return 0; 629 } 630 631 static int bcm_sysport_set_coalesce(struct net_device *dev, 632 struct ethtool_coalesce *ec, 633 struct kernel_ethtool_coalesce *kernel_coal, 634 struct netlink_ext_ack *extack) 635 { 636 struct bcm_sysport_priv *priv = netdev_priv(dev); 637 struct dim_cq_moder moder; 638 u32 usecs, pkts; 639 unsigned int i; 640 641 /* Base system clock is 125Mhz, DMA timeout is this reference clock 642 * divided by 1024, which yield roughly 8.192 us, our maximum value has 643 * to fit in the RING_TIMEOUT_MASK (16 bits). 644 */ 645 if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK || 646 ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 || 647 ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK || 648 ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1) 649 return -EINVAL; 650 651 if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) || 652 (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0)) 653 return -EINVAL; 654 655 for (i = 0; i < dev->num_tx_queues; i++) 656 bcm_sysport_set_tx_coalesce(&priv->tx_rings[i], ec); 657 658 priv->rx_coalesce_usecs = ec->rx_coalesce_usecs; 659 priv->rx_max_coalesced_frames = ec->rx_max_coalesced_frames; 660 usecs = priv->rx_coalesce_usecs; 661 pkts = priv->rx_max_coalesced_frames; 662 663 if (ec->use_adaptive_rx_coalesce && !priv->dim.use_dim) { 664 moder = net_dim_get_def_rx_moderation(priv->dim.dim.mode); 665 usecs = moder.usec; 666 pkts = moder.pkts; 667 } 668 669 priv->dim.use_dim = ec->use_adaptive_rx_coalesce; 670 671 /* Apply desired coalescing parameters */ 672 bcm_sysport_set_rx_coalesce(priv, usecs, pkts); 673 674 return 0; 675 } 676 677 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb) 678 { 679 dev_consume_skb_any(cb->skb); 680 cb->skb = NULL; 681 dma_unmap_addr_set(cb, dma_addr, 0); 682 } 683 684 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv, 685 struct bcm_sysport_cb *cb) 686 { 687 struct device *kdev = &priv->pdev->dev; 688 struct net_device *ndev = priv->netdev; 689 struct sk_buff *skb, *rx_skb; 690 dma_addr_t mapping; 691 692 /* Allocate a new SKB for a new packet */ 693 skb = __netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH, 694 GFP_ATOMIC | __GFP_NOWARN); 695 if (!skb) { 696 priv->mib.alloc_rx_buff_failed++; 697 netif_err(priv, rx_err, ndev, "SKB alloc failed\n"); 698 return NULL; 699 } 700 701 mapping = dma_map_single(kdev, skb->data, 702 RX_BUF_LENGTH, DMA_FROM_DEVICE); 703 if (dma_mapping_error(kdev, mapping)) { 704 priv->mib.rx_dma_failed++; 705 dev_kfree_skb_any(skb); 706 netif_err(priv, rx_err, ndev, "DMA mapping failure\n"); 707 return NULL; 708 } 709 710 /* Grab the current SKB on the ring */ 711 rx_skb = cb->skb; 712 if (likely(rx_skb)) 713 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr), 714 RX_BUF_LENGTH, DMA_FROM_DEVICE); 715 716 /* Put the new SKB on the ring */ 717 cb->skb = skb; 718 dma_unmap_addr_set(cb, dma_addr, mapping); 719 dma_desc_set_addr(priv, cb->bd_addr, mapping); 720 721 netif_dbg(priv, rx_status, ndev, "RX refill\n"); 722 723 /* Return the current SKB to the caller */ 724 return rx_skb; 725 } 726 727 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv) 728 { 729 struct bcm_sysport_cb *cb; 730 struct sk_buff *skb; 731 unsigned int i; 732 733 for (i = 0; i < priv->num_rx_bds; i++) { 734 cb = &priv->rx_cbs[i]; 735 skb = bcm_sysport_rx_refill(priv, cb); 736 dev_kfree_skb(skb); 737 if (!cb->skb) 738 return -ENOMEM; 739 } 740 741 return 0; 742 } 743 744 /* Poll the hardware for up to budget packets to process */ 745 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv, 746 unsigned int budget) 747 { 748 struct bcm_sysport_stats64 *stats64 = &priv->stats64; 749 struct net_device *ndev = priv->netdev; 750 unsigned int processed = 0, to_process; 751 unsigned int processed_bytes = 0; 752 struct bcm_sysport_cb *cb; 753 struct sk_buff *skb; 754 unsigned int p_index; 755 u16 len, status; 756 struct bcm_rsb *rsb; 757 758 /* Clear status before servicing to reduce spurious interrupts */ 759 intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR); 760 761 /* Determine how much we should process since last call, SYSTEMPORT Lite 762 * groups the producer and consumer indexes into the same 32-bit 763 * which we access using RDMA_CONS_INDEX 764 */ 765 if (!priv->is_lite) 766 p_index = rdma_readl(priv, RDMA_PROD_INDEX); 767 else 768 p_index = rdma_readl(priv, RDMA_CONS_INDEX); 769 p_index &= RDMA_PROD_INDEX_MASK; 770 771 to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK; 772 773 netif_dbg(priv, rx_status, ndev, 774 "p_index=%d rx_c_index=%d to_process=%d\n", 775 p_index, priv->rx_c_index, to_process); 776 777 while ((processed < to_process) && (processed < budget)) { 778 cb = &priv->rx_cbs[priv->rx_read_ptr]; 779 skb = bcm_sysport_rx_refill(priv, cb); 780 781 782 /* We do not have a backing SKB, so we do not a corresponding 783 * DMA mapping for this incoming packet since 784 * bcm_sysport_rx_refill always either has both skb and mapping 785 * or none. 786 */ 787 if (unlikely(!skb)) { 788 netif_err(priv, rx_err, ndev, "out of memory!\n"); 789 ndev->stats.rx_dropped++; 790 ndev->stats.rx_errors++; 791 goto next; 792 } 793 794 /* Extract the Receive Status Block prepended */ 795 rsb = (struct bcm_rsb *)skb->data; 796 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK; 797 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) & 798 DESC_STATUS_MASK; 799 800 netif_dbg(priv, rx_status, ndev, 801 "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n", 802 p_index, priv->rx_c_index, priv->rx_read_ptr, 803 len, status); 804 805 if (unlikely(len > RX_BUF_LENGTH)) { 806 netif_err(priv, rx_status, ndev, "oversized packet\n"); 807 ndev->stats.rx_length_errors++; 808 ndev->stats.rx_errors++; 809 dev_kfree_skb_any(skb); 810 goto next; 811 } 812 813 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) { 814 netif_err(priv, rx_status, ndev, "fragmented packet!\n"); 815 ndev->stats.rx_dropped++; 816 ndev->stats.rx_errors++; 817 dev_kfree_skb_any(skb); 818 goto next; 819 } 820 821 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) { 822 netif_err(priv, rx_err, ndev, "error packet\n"); 823 if (status & RX_STATUS_OVFLOW) 824 ndev->stats.rx_over_errors++; 825 ndev->stats.rx_dropped++; 826 ndev->stats.rx_errors++; 827 dev_kfree_skb_any(skb); 828 goto next; 829 } 830 831 skb_put(skb, len); 832 833 /* Hardware validated our checksum */ 834 if (likely(status & DESC_L4_CSUM)) 835 skb->ip_summed = CHECKSUM_UNNECESSARY; 836 837 /* Hardware pre-pends packets with 2bytes before Ethernet 838 * header plus we have the Receive Status Block, strip off all 839 * of this from the SKB. 840 */ 841 skb_pull(skb, sizeof(*rsb) + 2); 842 len -= (sizeof(*rsb) + 2); 843 processed_bytes += len; 844 845 /* UniMAC may forward CRC */ 846 if (priv->crc_fwd) { 847 skb_trim(skb, len - ETH_FCS_LEN); 848 len -= ETH_FCS_LEN; 849 } 850 851 skb->protocol = eth_type_trans(skb, ndev); 852 ndev->stats.rx_packets++; 853 ndev->stats.rx_bytes += len; 854 u64_stats_update_begin(&priv->syncp); 855 stats64->rx_packets++; 856 stats64->rx_bytes += len; 857 u64_stats_update_end(&priv->syncp); 858 859 napi_gro_receive(&priv->napi, skb); 860 next: 861 processed++; 862 priv->rx_read_ptr++; 863 864 if (priv->rx_read_ptr == priv->num_rx_bds) 865 priv->rx_read_ptr = 0; 866 } 867 868 priv->dim.packets = processed; 869 priv->dim.bytes = processed_bytes; 870 871 return processed; 872 } 873 874 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring, 875 struct bcm_sysport_cb *cb, 876 unsigned int *bytes_compl, 877 unsigned int *pkts_compl) 878 { 879 struct bcm_sysport_priv *priv = ring->priv; 880 struct device *kdev = &priv->pdev->dev; 881 882 if (cb->skb) { 883 *bytes_compl += cb->skb->len; 884 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr), 885 dma_unmap_len(cb, dma_len), 886 DMA_TO_DEVICE); 887 (*pkts_compl)++; 888 bcm_sysport_free_cb(cb); 889 /* SKB fragment */ 890 } else if (dma_unmap_addr(cb, dma_addr)) { 891 *bytes_compl += dma_unmap_len(cb, dma_len); 892 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr), 893 dma_unmap_len(cb, dma_len), DMA_TO_DEVICE); 894 dma_unmap_addr_set(cb, dma_addr, 0); 895 } 896 } 897 898 /* Reclaim queued SKBs for transmission completion, lockless version */ 899 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv, 900 struct bcm_sysport_tx_ring *ring) 901 { 902 unsigned int pkts_compl = 0, bytes_compl = 0; 903 struct net_device *ndev = priv->netdev; 904 unsigned int txbds_processed = 0; 905 struct bcm_sysport_cb *cb; 906 unsigned int txbds_ready; 907 unsigned int c_index; 908 u32 hw_ind; 909 910 /* Clear status before servicing to reduce spurious interrupts */ 911 if (!ring->priv->is_lite) 912 intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR); 913 else 914 intrl2_0_writel(ring->priv, BIT(ring->index + 915 INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR); 916 917 /* Compute how many descriptors have been processed since last call */ 918 hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index)); 919 c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK; 920 txbds_ready = (c_index - ring->c_index) & RING_CONS_INDEX_MASK; 921 922 netif_dbg(priv, tx_done, ndev, 923 "ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n", 924 ring->index, ring->c_index, c_index, txbds_ready); 925 926 while (txbds_processed < txbds_ready) { 927 cb = &ring->cbs[ring->clean_index]; 928 bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl); 929 930 ring->desc_count++; 931 txbds_processed++; 932 933 if (likely(ring->clean_index < ring->size - 1)) 934 ring->clean_index++; 935 else 936 ring->clean_index = 0; 937 } 938 939 u64_stats_update_begin(&priv->syncp); 940 ring->packets += pkts_compl; 941 ring->bytes += bytes_compl; 942 u64_stats_update_end(&priv->syncp); 943 944 ring->c_index = c_index; 945 946 netif_dbg(priv, tx_done, ndev, 947 "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n", 948 ring->index, ring->c_index, pkts_compl, bytes_compl); 949 950 return pkts_compl; 951 } 952 953 /* Locked version of the per-ring TX reclaim routine */ 954 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv, 955 struct bcm_sysport_tx_ring *ring) 956 { 957 struct netdev_queue *txq; 958 unsigned int released; 959 unsigned long flags; 960 961 txq = netdev_get_tx_queue(priv->netdev, ring->index); 962 963 spin_lock_irqsave(&ring->lock, flags); 964 released = __bcm_sysport_tx_reclaim(priv, ring); 965 if (released) 966 netif_tx_wake_queue(txq); 967 968 spin_unlock_irqrestore(&ring->lock, flags); 969 970 return released; 971 } 972 973 /* Locked version of the per-ring TX reclaim, but does not wake the queue */ 974 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv, 975 struct bcm_sysport_tx_ring *ring) 976 { 977 unsigned long flags; 978 979 spin_lock_irqsave(&ring->lock, flags); 980 __bcm_sysport_tx_reclaim(priv, ring); 981 spin_unlock_irqrestore(&ring->lock, flags); 982 } 983 984 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget) 985 { 986 struct bcm_sysport_tx_ring *ring = 987 container_of(napi, struct bcm_sysport_tx_ring, napi); 988 unsigned int work_done = 0; 989 990 work_done = bcm_sysport_tx_reclaim(ring->priv, ring); 991 992 if (work_done == 0) { 993 napi_complete(napi); 994 /* re-enable TX interrupt */ 995 if (!ring->priv->is_lite) 996 intrl2_1_mask_clear(ring->priv, BIT(ring->index)); 997 else 998 intrl2_0_mask_clear(ring->priv, BIT(ring->index + 999 INTRL2_0_TDMA_MBDONE_SHIFT)); 1000 1001 return 0; 1002 } 1003 1004 return budget; 1005 } 1006 1007 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv) 1008 { 1009 unsigned int q; 1010 1011 for (q = 0; q < priv->netdev->num_tx_queues; q++) 1012 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]); 1013 } 1014 1015 static int bcm_sysport_poll(struct napi_struct *napi, int budget) 1016 { 1017 struct bcm_sysport_priv *priv = 1018 container_of(napi, struct bcm_sysport_priv, napi); 1019 struct dim_sample dim_sample = {}; 1020 unsigned int work_done = 0; 1021 1022 work_done = bcm_sysport_desc_rx(priv, budget); 1023 1024 priv->rx_c_index += work_done; 1025 priv->rx_c_index &= RDMA_CONS_INDEX_MASK; 1026 1027 /* SYSTEMPORT Lite groups the producer/consumer index, producer is 1028 * maintained by HW, but writes to it will be ignore while RDMA 1029 * is active 1030 */ 1031 if (!priv->is_lite) 1032 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX); 1033 else 1034 rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX); 1035 1036 if (work_done < budget) { 1037 napi_complete_done(napi, work_done); 1038 /* re-enable RX interrupts */ 1039 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE); 1040 } 1041 1042 if (priv->dim.use_dim) { 1043 dim_update_sample(priv->dim.event_ctr, priv->dim.packets, 1044 priv->dim.bytes, &dim_sample); 1045 net_dim(&priv->dim.dim, dim_sample); 1046 } 1047 1048 return work_done; 1049 } 1050 1051 static void mpd_enable_set(struct bcm_sysport_priv *priv, bool enable) 1052 { 1053 u32 reg, bit; 1054 1055 reg = umac_readl(priv, UMAC_MPD_CTRL); 1056 if (enable) 1057 reg |= MPD_EN; 1058 else 1059 reg &= ~MPD_EN; 1060 umac_writel(priv, reg, UMAC_MPD_CTRL); 1061 1062 if (priv->is_lite) 1063 bit = RBUF_ACPI_EN_LITE; 1064 else 1065 bit = RBUF_ACPI_EN; 1066 1067 reg = rbuf_readl(priv, RBUF_CONTROL); 1068 if (enable) 1069 reg |= bit; 1070 else 1071 reg &= ~bit; 1072 rbuf_writel(priv, reg, RBUF_CONTROL); 1073 } 1074 1075 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv) 1076 { 1077 unsigned int index; 1078 u32 reg; 1079 1080 /* Disable RXCHK, active filters and Broadcom tag matching */ 1081 reg = rxchk_readl(priv, RXCHK_CONTROL); 1082 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK << 1083 RXCHK_BRCM_TAG_MATCH_SHIFT | RXCHK_EN | RXCHK_BRCM_TAG_EN); 1084 rxchk_writel(priv, reg, RXCHK_CONTROL); 1085 1086 /* Make sure we restore correct CID index in case HW lost 1087 * its context during deep idle state 1088 */ 1089 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) { 1090 rxchk_writel(priv, priv->filters_loc[index] << 1091 RXCHK_BRCM_TAG_CID_SHIFT, RXCHK_BRCM_TAG(index)); 1092 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index)); 1093 } 1094 1095 /* Clear the MagicPacket detection logic */ 1096 mpd_enable_set(priv, false); 1097 1098 reg = intrl2_0_readl(priv, INTRL2_CPU_STATUS); 1099 if (reg & INTRL2_0_MPD) 1100 netdev_info(priv->netdev, "Wake-on-LAN (MPD) interrupt!\n"); 1101 1102 if (reg & INTRL2_0_BRCM_MATCH_TAG) { 1103 reg = rxchk_readl(priv, RXCHK_BRCM_TAG_MATCH_STATUS) & 1104 RXCHK_BRCM_TAG_MATCH_MASK; 1105 netdev_info(priv->netdev, 1106 "Wake-on-LAN (filters 0x%02x) interrupt!\n", reg); 1107 } 1108 1109 netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n"); 1110 } 1111 1112 static void bcm_sysport_dim_work(struct work_struct *work) 1113 { 1114 struct dim *dim = container_of(work, struct dim, work); 1115 struct bcm_sysport_net_dim *ndim = 1116 container_of(dim, struct bcm_sysport_net_dim, dim); 1117 struct bcm_sysport_priv *priv = 1118 container_of(ndim, struct bcm_sysport_priv, dim); 1119 struct dim_cq_moder cur_profile = net_dim_get_rx_moderation(dim->mode, 1120 dim->profile_ix); 1121 1122 bcm_sysport_set_rx_coalesce(priv, cur_profile.usec, cur_profile.pkts); 1123 dim->state = DIM_START_MEASURE; 1124 } 1125 1126 /* RX and misc interrupt routine */ 1127 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id) 1128 { 1129 struct net_device *dev = dev_id; 1130 struct bcm_sysport_priv *priv = netdev_priv(dev); 1131 struct bcm_sysport_tx_ring *txr; 1132 unsigned int ring, ring_bit; 1133 1134 priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) & 1135 ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS); 1136 intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR); 1137 1138 if (unlikely(priv->irq0_stat == 0)) { 1139 netdev_warn(priv->netdev, "spurious RX interrupt\n"); 1140 return IRQ_NONE; 1141 } 1142 1143 if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) { 1144 priv->dim.event_ctr++; 1145 if (likely(napi_schedule_prep(&priv->napi))) { 1146 /* disable RX interrupts */ 1147 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE); 1148 __napi_schedule_irqoff(&priv->napi); 1149 } 1150 } 1151 1152 /* TX ring is full, perform a full reclaim since we do not know 1153 * which one would trigger this interrupt 1154 */ 1155 if (priv->irq0_stat & INTRL2_0_TX_RING_FULL) 1156 bcm_sysport_tx_reclaim_all(priv); 1157 1158 if (!priv->is_lite) 1159 goto out; 1160 1161 for (ring = 0; ring < dev->num_tx_queues; ring++) { 1162 ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT); 1163 if (!(priv->irq0_stat & ring_bit)) 1164 continue; 1165 1166 txr = &priv->tx_rings[ring]; 1167 1168 if (likely(napi_schedule_prep(&txr->napi))) { 1169 intrl2_0_mask_set(priv, ring_bit); 1170 __napi_schedule(&txr->napi); 1171 } 1172 } 1173 out: 1174 return IRQ_HANDLED; 1175 } 1176 1177 /* TX interrupt service routine */ 1178 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id) 1179 { 1180 struct net_device *dev = dev_id; 1181 struct bcm_sysport_priv *priv = netdev_priv(dev); 1182 struct bcm_sysport_tx_ring *txr; 1183 unsigned int ring; 1184 1185 priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) & 1186 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS); 1187 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); 1188 1189 if (unlikely(priv->irq1_stat == 0)) { 1190 netdev_warn(priv->netdev, "spurious TX interrupt\n"); 1191 return IRQ_NONE; 1192 } 1193 1194 for (ring = 0; ring < dev->num_tx_queues; ring++) { 1195 if (!(priv->irq1_stat & BIT(ring))) 1196 continue; 1197 1198 txr = &priv->tx_rings[ring]; 1199 1200 if (likely(napi_schedule_prep(&txr->napi))) { 1201 intrl2_1_mask_set(priv, BIT(ring)); 1202 __napi_schedule_irqoff(&txr->napi); 1203 } 1204 } 1205 1206 return IRQ_HANDLED; 1207 } 1208 1209 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id) 1210 { 1211 struct bcm_sysport_priv *priv = dev_id; 1212 1213 pm_wakeup_event(&priv->pdev->dev, 0); 1214 1215 return IRQ_HANDLED; 1216 } 1217 1218 #ifdef CONFIG_NET_POLL_CONTROLLER 1219 static void bcm_sysport_poll_controller(struct net_device *dev) 1220 { 1221 struct bcm_sysport_priv *priv = netdev_priv(dev); 1222 1223 disable_irq(priv->irq0); 1224 bcm_sysport_rx_isr(priv->irq0, priv); 1225 enable_irq(priv->irq0); 1226 1227 if (!priv->is_lite) { 1228 disable_irq(priv->irq1); 1229 bcm_sysport_tx_isr(priv->irq1, priv); 1230 enable_irq(priv->irq1); 1231 } 1232 } 1233 #endif 1234 1235 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb, 1236 struct net_device *dev) 1237 { 1238 struct bcm_sysport_priv *priv = netdev_priv(dev); 1239 struct sk_buff *nskb; 1240 struct bcm_tsb *tsb; 1241 u32 csum_info; 1242 u8 ip_proto; 1243 u16 csum_start; 1244 __be16 ip_ver; 1245 1246 /* Re-allocate SKB if needed */ 1247 if (unlikely(skb_headroom(skb) < sizeof(*tsb))) { 1248 nskb = skb_realloc_headroom(skb, sizeof(*tsb)); 1249 if (!nskb) { 1250 dev_kfree_skb_any(skb); 1251 priv->mib.tx_realloc_tsb_failed++; 1252 dev->stats.tx_errors++; 1253 dev->stats.tx_dropped++; 1254 return NULL; 1255 } 1256 dev_consume_skb_any(skb); 1257 skb = nskb; 1258 priv->mib.tx_realloc_tsb++; 1259 } 1260 1261 tsb = skb_push(skb, sizeof(*tsb)); 1262 /* Zero-out TSB by default */ 1263 memset(tsb, 0, sizeof(*tsb)); 1264 1265 if (skb_vlan_tag_present(skb)) { 1266 tsb->pcp_dei_vid = skb_vlan_tag_get_prio(skb) & PCP_DEI_MASK; 1267 tsb->pcp_dei_vid |= (u32)skb_vlan_tag_get_id(skb) << VID_SHIFT; 1268 } 1269 1270 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1271 ip_ver = skb->protocol; 1272 switch (ip_ver) { 1273 case htons(ETH_P_IP): 1274 ip_proto = ip_hdr(skb)->protocol; 1275 break; 1276 case htons(ETH_P_IPV6): 1277 ip_proto = ipv6_hdr(skb)->nexthdr; 1278 break; 1279 default: 1280 return skb; 1281 } 1282 1283 /* Get the checksum offset and the L4 (transport) offset */ 1284 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb); 1285 /* Account for the HW inserted VLAN tag */ 1286 if (skb_vlan_tag_present(skb)) 1287 csum_start += VLAN_HLEN; 1288 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK; 1289 csum_info |= (csum_start << L4_PTR_SHIFT); 1290 1291 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) { 1292 csum_info |= L4_LENGTH_VALID; 1293 if (ip_proto == IPPROTO_UDP && 1294 ip_ver == htons(ETH_P_IP)) 1295 csum_info |= L4_UDP; 1296 } else { 1297 csum_info = 0; 1298 } 1299 1300 tsb->l4_ptr_dest_map = csum_info; 1301 } 1302 1303 return skb; 1304 } 1305 1306 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb, 1307 struct net_device *dev) 1308 { 1309 struct bcm_sysport_priv *priv = netdev_priv(dev); 1310 struct device *kdev = &priv->pdev->dev; 1311 struct bcm_sysport_tx_ring *ring; 1312 struct bcm_sysport_cb *cb; 1313 struct netdev_queue *txq; 1314 u32 len_status, addr_lo; 1315 unsigned int skb_len; 1316 unsigned long flags; 1317 dma_addr_t mapping; 1318 u16 queue; 1319 int ret; 1320 1321 queue = skb_get_queue_mapping(skb); 1322 txq = netdev_get_tx_queue(dev, queue); 1323 ring = &priv->tx_rings[queue]; 1324 1325 /* lock against tx reclaim in BH context and TX ring full interrupt */ 1326 spin_lock_irqsave(&ring->lock, flags); 1327 if (unlikely(ring->desc_count == 0)) { 1328 netif_tx_stop_queue(txq); 1329 netdev_err(dev, "queue %d awake and ring full!\n", queue); 1330 ret = NETDEV_TX_BUSY; 1331 goto out; 1332 } 1333 1334 /* Insert TSB and checksum infos */ 1335 if (priv->tsb_en) { 1336 skb = bcm_sysport_insert_tsb(skb, dev); 1337 if (!skb) { 1338 ret = NETDEV_TX_OK; 1339 goto out; 1340 } 1341 } 1342 1343 skb_len = skb->len; 1344 1345 mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE); 1346 if (dma_mapping_error(kdev, mapping)) { 1347 priv->mib.tx_dma_failed++; 1348 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n", 1349 skb->data, skb_len); 1350 ret = NETDEV_TX_OK; 1351 goto out; 1352 } 1353 1354 /* Remember the SKB for future freeing */ 1355 cb = &ring->cbs[ring->curr_desc]; 1356 cb->skb = skb; 1357 dma_unmap_addr_set(cb, dma_addr, mapping); 1358 dma_unmap_len_set(cb, dma_len, skb_len); 1359 1360 addr_lo = lower_32_bits(mapping); 1361 len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK; 1362 len_status |= (skb_len << DESC_LEN_SHIFT); 1363 len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) << 1364 DESC_STATUS_SHIFT; 1365 if (skb->ip_summed == CHECKSUM_PARTIAL) 1366 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT); 1367 if (skb_vlan_tag_present(skb)) 1368 len_status |= (TX_STATUS_VLAN_VID_TSB << DESC_STATUS_SHIFT); 1369 1370 ring->curr_desc++; 1371 if (ring->curr_desc == ring->size) 1372 ring->curr_desc = 0; 1373 ring->desc_count--; 1374 1375 /* Ports are latched, so write upper address first */ 1376 tdma_writel(priv, len_status, TDMA_WRITE_PORT_HI(ring->index)); 1377 tdma_writel(priv, addr_lo, TDMA_WRITE_PORT_LO(ring->index)); 1378 1379 /* Check ring space and update SW control flow */ 1380 if (ring->desc_count == 0) 1381 netif_tx_stop_queue(txq); 1382 1383 netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n", 1384 ring->index, ring->desc_count, ring->curr_desc); 1385 1386 ret = NETDEV_TX_OK; 1387 out: 1388 spin_unlock_irqrestore(&ring->lock, flags); 1389 return ret; 1390 } 1391 1392 static void bcm_sysport_tx_timeout(struct net_device *dev, unsigned int txqueue) 1393 { 1394 netdev_warn(dev, "transmit timeout!\n"); 1395 1396 netif_trans_update(dev); 1397 dev->stats.tx_errors++; 1398 1399 netif_tx_wake_all_queues(dev); 1400 } 1401 1402 /* phylib adjust link callback */ 1403 static void bcm_sysport_adj_link(struct net_device *dev) 1404 { 1405 struct bcm_sysport_priv *priv = netdev_priv(dev); 1406 struct phy_device *phydev = dev->phydev; 1407 unsigned int changed = 0; 1408 u32 cmd_bits = 0, reg; 1409 1410 if (priv->old_link != phydev->link) { 1411 changed = 1; 1412 priv->old_link = phydev->link; 1413 } 1414 1415 if (priv->old_duplex != phydev->duplex) { 1416 changed = 1; 1417 priv->old_duplex = phydev->duplex; 1418 } 1419 1420 if (priv->is_lite) 1421 goto out; 1422 1423 switch (phydev->speed) { 1424 case SPEED_2500: 1425 cmd_bits = CMD_SPEED_2500; 1426 break; 1427 case SPEED_1000: 1428 cmd_bits = CMD_SPEED_1000; 1429 break; 1430 case SPEED_100: 1431 cmd_bits = CMD_SPEED_100; 1432 break; 1433 case SPEED_10: 1434 cmd_bits = CMD_SPEED_10; 1435 break; 1436 default: 1437 break; 1438 } 1439 cmd_bits <<= CMD_SPEED_SHIFT; 1440 1441 if (phydev->duplex == DUPLEX_HALF) 1442 cmd_bits |= CMD_HD_EN; 1443 1444 if (priv->old_pause != phydev->pause) { 1445 changed = 1; 1446 priv->old_pause = phydev->pause; 1447 } 1448 1449 if (!phydev->pause) 1450 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE; 1451 1452 if (!changed) 1453 return; 1454 1455 if (phydev->link) { 1456 reg = umac_readl(priv, UMAC_CMD); 1457 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) | 1458 CMD_HD_EN | CMD_RX_PAUSE_IGNORE | 1459 CMD_TX_PAUSE_IGNORE); 1460 reg |= cmd_bits; 1461 umac_writel(priv, reg, UMAC_CMD); 1462 } 1463 out: 1464 if (changed) 1465 phy_print_status(phydev); 1466 } 1467 1468 static void bcm_sysport_init_dim(struct bcm_sysport_priv *priv, 1469 void (*cb)(struct work_struct *work)) 1470 { 1471 struct bcm_sysport_net_dim *dim = &priv->dim; 1472 1473 INIT_WORK(&dim->dim.work, cb); 1474 dim->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE; 1475 dim->event_ctr = 0; 1476 dim->packets = 0; 1477 dim->bytes = 0; 1478 } 1479 1480 static void bcm_sysport_init_rx_coalesce(struct bcm_sysport_priv *priv) 1481 { 1482 struct bcm_sysport_net_dim *dim = &priv->dim; 1483 struct dim_cq_moder moder; 1484 u32 usecs, pkts; 1485 1486 usecs = priv->rx_coalesce_usecs; 1487 pkts = priv->rx_max_coalesced_frames; 1488 1489 /* If DIM was enabled, re-apply default parameters */ 1490 if (dim->use_dim) { 1491 moder = net_dim_get_def_rx_moderation(dim->dim.mode); 1492 usecs = moder.usec; 1493 pkts = moder.pkts; 1494 } 1495 1496 bcm_sysport_set_rx_coalesce(priv, usecs, pkts); 1497 } 1498 1499 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv, 1500 unsigned int index) 1501 { 1502 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index]; 1503 size_t size; 1504 u32 reg; 1505 1506 /* Simple descriptors partitioning for now */ 1507 size = 256; 1508 1509 ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL); 1510 if (!ring->cbs) { 1511 netif_err(priv, hw, priv->netdev, "CB allocation failed\n"); 1512 return -ENOMEM; 1513 } 1514 1515 /* Initialize SW view of the ring */ 1516 spin_lock_init(&ring->lock); 1517 ring->priv = priv; 1518 netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64); 1519 ring->index = index; 1520 ring->size = size; 1521 ring->clean_index = 0; 1522 ring->alloc_size = ring->size; 1523 ring->desc_count = ring->size; 1524 ring->curr_desc = 0; 1525 1526 /* Initialize HW ring */ 1527 tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index)); 1528 tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index)); 1529 tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index)); 1530 tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index)); 1531 1532 /* Configure QID and port mapping */ 1533 reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index)); 1534 reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT); 1535 if (ring->inspect) { 1536 reg |= ring->switch_queue & RING_QID_MASK; 1537 reg |= ring->switch_port << RING_PORT_ID_SHIFT; 1538 } else { 1539 reg |= RING_IGNORE_STATUS; 1540 } 1541 tdma_writel(priv, reg, TDMA_DESC_RING_MAPPING(index)); 1542 reg = 0; 1543 /* Adjust the packet size calculations if SYSTEMPORT is responsible 1544 * for HW insertion of VLAN tags 1545 */ 1546 if (priv->netdev->features & NETIF_F_HW_VLAN_CTAG_TX) 1547 reg = VLAN_HLEN << RING_PKT_SIZE_ADJ_SHIFT; 1548 tdma_writel(priv, reg, TDMA_DESC_RING_PCP_DEI_VID(index)); 1549 1550 /* Enable ACB algorithm 2 */ 1551 reg = tdma_readl(priv, TDMA_CONTROL); 1552 reg |= tdma_control_bit(priv, ACB_ALGO); 1553 tdma_writel(priv, reg, TDMA_CONTROL); 1554 1555 /* Do not use tdma_control_bit() here because TSB_SWAP1 collides 1556 * with the original definition of ACB_ALGO 1557 */ 1558 reg = tdma_readl(priv, TDMA_CONTROL); 1559 if (priv->is_lite) 1560 reg &= ~BIT(TSB_SWAP1); 1561 /* Set a correct TSB format based on host endian */ 1562 if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)) 1563 reg |= tdma_control_bit(priv, TSB_SWAP0); 1564 else 1565 reg &= ~tdma_control_bit(priv, TSB_SWAP0); 1566 tdma_writel(priv, reg, TDMA_CONTROL); 1567 1568 /* Program the number of descriptors as MAX_THRESHOLD and half of 1569 * its size for the hysteresis trigger 1570 */ 1571 tdma_writel(priv, ring->size | 1572 1 << RING_HYST_THRESH_SHIFT, 1573 TDMA_DESC_RING_MAX_HYST(index)); 1574 1575 /* Enable the ring queue in the arbiter */ 1576 reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN); 1577 reg |= (1 << index); 1578 tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN); 1579 1580 napi_enable(&ring->napi); 1581 1582 netif_dbg(priv, hw, priv->netdev, 1583 "TDMA cfg, size=%d, switch q=%d,port=%d\n", 1584 ring->size, ring->switch_queue, 1585 ring->switch_port); 1586 1587 return 0; 1588 } 1589 1590 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv, 1591 unsigned int index) 1592 { 1593 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index]; 1594 u32 reg; 1595 1596 /* Caller should stop the TDMA engine */ 1597 reg = tdma_readl(priv, TDMA_STATUS); 1598 if (!(reg & TDMA_DISABLED)) 1599 netdev_warn(priv->netdev, "TDMA not stopped!\n"); 1600 1601 /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could 1602 * fail, so by checking this pointer we know whether the TX ring was 1603 * fully initialized or not. 1604 */ 1605 if (!ring->cbs) 1606 return; 1607 1608 napi_disable(&ring->napi); 1609 netif_napi_del(&ring->napi); 1610 1611 bcm_sysport_tx_clean(priv, ring); 1612 1613 kfree(ring->cbs); 1614 ring->cbs = NULL; 1615 ring->size = 0; 1616 ring->alloc_size = 0; 1617 1618 netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n"); 1619 } 1620 1621 /* RDMA helper */ 1622 static inline int rdma_enable_set(struct bcm_sysport_priv *priv, 1623 unsigned int enable) 1624 { 1625 unsigned int timeout = 1000; 1626 u32 reg; 1627 1628 reg = rdma_readl(priv, RDMA_CONTROL); 1629 if (enable) 1630 reg |= RDMA_EN; 1631 else 1632 reg &= ~RDMA_EN; 1633 rdma_writel(priv, reg, RDMA_CONTROL); 1634 1635 /* Poll for RMDA disabling completion */ 1636 do { 1637 reg = rdma_readl(priv, RDMA_STATUS); 1638 if (!!(reg & RDMA_DISABLED) == !enable) 1639 return 0; 1640 usleep_range(1000, 2000); 1641 } while (timeout-- > 0); 1642 1643 netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n"); 1644 1645 return -ETIMEDOUT; 1646 } 1647 1648 /* TDMA helper */ 1649 static inline int tdma_enable_set(struct bcm_sysport_priv *priv, 1650 unsigned int enable) 1651 { 1652 unsigned int timeout = 1000; 1653 u32 reg; 1654 1655 reg = tdma_readl(priv, TDMA_CONTROL); 1656 if (enable) 1657 reg |= tdma_control_bit(priv, TDMA_EN); 1658 else 1659 reg &= ~tdma_control_bit(priv, TDMA_EN); 1660 tdma_writel(priv, reg, TDMA_CONTROL); 1661 1662 /* Poll for TMDA disabling completion */ 1663 do { 1664 reg = tdma_readl(priv, TDMA_STATUS); 1665 if (!!(reg & TDMA_DISABLED) == !enable) 1666 return 0; 1667 1668 usleep_range(1000, 2000); 1669 } while (timeout-- > 0); 1670 1671 netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n"); 1672 1673 return -ETIMEDOUT; 1674 } 1675 1676 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv) 1677 { 1678 struct bcm_sysport_cb *cb; 1679 u32 reg; 1680 int ret; 1681 int i; 1682 1683 /* Initialize SW view of the RX ring */ 1684 priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC; 1685 priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET; 1686 priv->rx_c_index = 0; 1687 priv->rx_read_ptr = 0; 1688 priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb), 1689 GFP_KERNEL); 1690 if (!priv->rx_cbs) { 1691 netif_err(priv, hw, priv->netdev, "CB allocation failed\n"); 1692 return -ENOMEM; 1693 } 1694 1695 for (i = 0; i < priv->num_rx_bds; i++) { 1696 cb = priv->rx_cbs + i; 1697 cb->bd_addr = priv->rx_bds + i * DESC_SIZE; 1698 } 1699 1700 ret = bcm_sysport_alloc_rx_bufs(priv); 1701 if (ret) { 1702 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n"); 1703 return ret; 1704 } 1705 1706 /* Initialize HW, ensure RDMA is disabled */ 1707 reg = rdma_readl(priv, RDMA_STATUS); 1708 if (!(reg & RDMA_DISABLED)) 1709 rdma_enable_set(priv, 0); 1710 1711 rdma_writel(priv, 0, RDMA_WRITE_PTR_LO); 1712 rdma_writel(priv, 0, RDMA_WRITE_PTR_HI); 1713 rdma_writel(priv, 0, RDMA_PROD_INDEX); 1714 rdma_writel(priv, 0, RDMA_CONS_INDEX); 1715 rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT | 1716 RX_BUF_LENGTH, RDMA_RING_BUF_SIZE); 1717 /* Operate the queue in ring mode */ 1718 rdma_writel(priv, 0, RDMA_START_ADDR_HI); 1719 rdma_writel(priv, 0, RDMA_START_ADDR_LO); 1720 rdma_writel(priv, 0, RDMA_END_ADDR_HI); 1721 rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO); 1722 1723 netif_dbg(priv, hw, priv->netdev, 1724 "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n", 1725 priv->num_rx_bds, priv->rx_bds); 1726 1727 return 0; 1728 } 1729 1730 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv) 1731 { 1732 struct bcm_sysport_cb *cb; 1733 unsigned int i; 1734 u32 reg; 1735 1736 /* Caller should ensure RDMA is disabled */ 1737 reg = rdma_readl(priv, RDMA_STATUS); 1738 if (!(reg & RDMA_DISABLED)) 1739 netdev_warn(priv->netdev, "RDMA not stopped!\n"); 1740 1741 for (i = 0; i < priv->num_rx_bds; i++) { 1742 cb = &priv->rx_cbs[i]; 1743 if (dma_unmap_addr(cb, dma_addr)) 1744 dma_unmap_single(&priv->pdev->dev, 1745 dma_unmap_addr(cb, dma_addr), 1746 RX_BUF_LENGTH, DMA_FROM_DEVICE); 1747 bcm_sysport_free_cb(cb); 1748 } 1749 1750 kfree(priv->rx_cbs); 1751 priv->rx_cbs = NULL; 1752 1753 netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n"); 1754 } 1755 1756 static void bcm_sysport_set_rx_mode(struct net_device *dev) 1757 { 1758 struct bcm_sysport_priv *priv = netdev_priv(dev); 1759 u32 reg; 1760 1761 if (priv->is_lite) 1762 return; 1763 1764 reg = umac_readl(priv, UMAC_CMD); 1765 if (dev->flags & IFF_PROMISC) 1766 reg |= CMD_PROMISC; 1767 else 1768 reg &= ~CMD_PROMISC; 1769 umac_writel(priv, reg, UMAC_CMD); 1770 1771 /* No support for ALLMULTI */ 1772 if (dev->flags & IFF_ALLMULTI) 1773 return; 1774 } 1775 1776 static inline void umac_enable_set(struct bcm_sysport_priv *priv, 1777 u32 mask, unsigned int enable) 1778 { 1779 u32 reg; 1780 1781 if (!priv->is_lite) { 1782 reg = umac_readl(priv, UMAC_CMD); 1783 if (enable) 1784 reg |= mask; 1785 else 1786 reg &= ~mask; 1787 umac_writel(priv, reg, UMAC_CMD); 1788 } else { 1789 reg = gib_readl(priv, GIB_CONTROL); 1790 if (enable) 1791 reg |= mask; 1792 else 1793 reg &= ~mask; 1794 gib_writel(priv, reg, GIB_CONTROL); 1795 } 1796 1797 /* UniMAC stops on a packet boundary, wait for a full-sized packet 1798 * to be processed (1 msec). 1799 */ 1800 if (enable == 0) 1801 usleep_range(1000, 2000); 1802 } 1803 1804 static inline void umac_reset(struct bcm_sysport_priv *priv) 1805 { 1806 u32 reg; 1807 1808 if (priv->is_lite) 1809 return; 1810 1811 reg = umac_readl(priv, UMAC_CMD); 1812 reg |= CMD_SW_RESET; 1813 umac_writel(priv, reg, UMAC_CMD); 1814 udelay(10); 1815 reg = umac_readl(priv, UMAC_CMD); 1816 reg &= ~CMD_SW_RESET; 1817 umac_writel(priv, reg, UMAC_CMD); 1818 } 1819 1820 static void umac_set_hw_addr(struct bcm_sysport_priv *priv, 1821 const unsigned char *addr) 1822 { 1823 u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | 1824 addr[3]; 1825 u32 mac1 = (addr[4] << 8) | addr[5]; 1826 1827 if (!priv->is_lite) { 1828 umac_writel(priv, mac0, UMAC_MAC0); 1829 umac_writel(priv, mac1, UMAC_MAC1); 1830 } else { 1831 gib_writel(priv, mac0, GIB_MAC0); 1832 gib_writel(priv, mac1, GIB_MAC1); 1833 } 1834 } 1835 1836 static void topctrl_flush(struct bcm_sysport_priv *priv) 1837 { 1838 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL); 1839 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL); 1840 mdelay(1); 1841 topctrl_writel(priv, 0, RX_FLUSH_CNTL); 1842 topctrl_writel(priv, 0, TX_FLUSH_CNTL); 1843 } 1844 1845 static int bcm_sysport_change_mac(struct net_device *dev, void *p) 1846 { 1847 struct bcm_sysport_priv *priv = netdev_priv(dev); 1848 struct sockaddr *addr = p; 1849 1850 if (!is_valid_ether_addr(addr->sa_data)) 1851 return -EINVAL; 1852 1853 eth_hw_addr_set(dev, addr->sa_data); 1854 1855 /* interface is disabled, changes to MAC will be reflected on next 1856 * open call 1857 */ 1858 if (!netif_running(dev)) 1859 return 0; 1860 1861 umac_set_hw_addr(priv, dev->dev_addr); 1862 1863 return 0; 1864 } 1865 1866 static void bcm_sysport_get_stats64(struct net_device *dev, 1867 struct rtnl_link_stats64 *stats) 1868 { 1869 struct bcm_sysport_priv *priv = netdev_priv(dev); 1870 struct bcm_sysport_stats64 *stats64 = &priv->stats64; 1871 unsigned int start; 1872 1873 netdev_stats_to_stats64(stats, &dev->stats); 1874 1875 bcm_sysport_update_tx_stats(priv, &stats->tx_bytes, 1876 &stats->tx_packets); 1877 1878 do { 1879 start = u64_stats_fetch_begin_irq(&priv->syncp); 1880 stats->rx_packets = stats64->rx_packets; 1881 stats->rx_bytes = stats64->rx_bytes; 1882 } while (u64_stats_fetch_retry_irq(&priv->syncp, start)); 1883 } 1884 1885 static void bcm_sysport_netif_start(struct net_device *dev) 1886 { 1887 struct bcm_sysport_priv *priv = netdev_priv(dev); 1888 1889 /* Enable NAPI */ 1890 bcm_sysport_init_dim(priv, bcm_sysport_dim_work); 1891 bcm_sysport_init_rx_coalesce(priv); 1892 napi_enable(&priv->napi); 1893 1894 /* Enable RX interrupt and TX ring full interrupt */ 1895 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL); 1896 1897 phy_start(dev->phydev); 1898 1899 /* Enable TX interrupts for the TXQs */ 1900 if (!priv->is_lite) 1901 intrl2_1_mask_clear(priv, 0xffffffff); 1902 else 1903 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK); 1904 } 1905 1906 static void rbuf_init(struct bcm_sysport_priv *priv) 1907 { 1908 u32 reg; 1909 1910 reg = rbuf_readl(priv, RBUF_CONTROL); 1911 reg |= RBUF_4B_ALGN | RBUF_RSB_EN; 1912 /* Set a correct RSB format on SYSTEMPORT Lite */ 1913 if (priv->is_lite) 1914 reg &= ~RBUF_RSB_SWAP1; 1915 1916 /* Set a correct RSB format based on host endian */ 1917 if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)) 1918 reg |= RBUF_RSB_SWAP0; 1919 else 1920 reg &= ~RBUF_RSB_SWAP0; 1921 rbuf_writel(priv, reg, RBUF_CONTROL); 1922 } 1923 1924 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv) 1925 { 1926 intrl2_0_mask_set(priv, 0xffffffff); 1927 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); 1928 if (!priv->is_lite) { 1929 intrl2_1_mask_set(priv, 0xffffffff); 1930 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); 1931 } 1932 } 1933 1934 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv) 1935 { 1936 u32 reg; 1937 1938 reg = gib_readl(priv, GIB_CONTROL); 1939 /* Include Broadcom tag in pad extension and fix up IPG_LENGTH */ 1940 if (netdev_uses_dsa(priv->netdev)) { 1941 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT); 1942 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT; 1943 } 1944 reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT); 1945 reg |= 12 << GIB_IPG_LEN_SHIFT; 1946 gib_writel(priv, reg, GIB_CONTROL); 1947 } 1948 1949 static int bcm_sysport_open(struct net_device *dev) 1950 { 1951 struct bcm_sysport_priv *priv = netdev_priv(dev); 1952 struct phy_device *phydev; 1953 unsigned int i; 1954 int ret; 1955 1956 clk_prepare_enable(priv->clk); 1957 1958 /* Reset UniMAC */ 1959 umac_reset(priv); 1960 1961 /* Flush TX and RX FIFOs at TOPCTRL level */ 1962 topctrl_flush(priv); 1963 1964 /* Disable the UniMAC RX/TX */ 1965 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0); 1966 1967 /* Enable RBUF 2bytes alignment and Receive Status Block */ 1968 rbuf_init(priv); 1969 1970 /* Set maximum frame length */ 1971 if (!priv->is_lite) 1972 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN); 1973 else 1974 gib_set_pad_extension(priv); 1975 1976 /* Apply features again in case we changed them while interface was 1977 * down 1978 */ 1979 bcm_sysport_set_features(dev, dev->features); 1980 1981 /* Set MAC address */ 1982 umac_set_hw_addr(priv, dev->dev_addr); 1983 1984 phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link, 1985 0, priv->phy_interface); 1986 if (!phydev) { 1987 netdev_err(dev, "could not attach to PHY\n"); 1988 ret = -ENODEV; 1989 goto out_clk_disable; 1990 } 1991 1992 /* Reset house keeping link status */ 1993 priv->old_duplex = -1; 1994 priv->old_link = -1; 1995 priv->old_pause = -1; 1996 1997 /* mask all interrupts and request them */ 1998 bcm_sysport_mask_all_intrs(priv); 1999 2000 ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev); 2001 if (ret) { 2002 netdev_err(dev, "failed to request RX interrupt\n"); 2003 goto out_phy_disconnect; 2004 } 2005 2006 if (!priv->is_lite) { 2007 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0, 2008 dev->name, dev); 2009 if (ret) { 2010 netdev_err(dev, "failed to request TX interrupt\n"); 2011 goto out_free_irq0; 2012 } 2013 } 2014 2015 /* Initialize both hardware and software ring */ 2016 for (i = 0; i < dev->num_tx_queues; i++) { 2017 ret = bcm_sysport_init_tx_ring(priv, i); 2018 if (ret) { 2019 netdev_err(dev, "failed to initialize TX ring %d\n", 2020 i); 2021 goto out_free_tx_ring; 2022 } 2023 } 2024 2025 /* Initialize linked-list */ 2026 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS); 2027 2028 /* Initialize RX ring */ 2029 ret = bcm_sysport_init_rx_ring(priv); 2030 if (ret) { 2031 netdev_err(dev, "failed to initialize RX ring\n"); 2032 goto out_free_rx_ring; 2033 } 2034 2035 /* Turn on RDMA */ 2036 ret = rdma_enable_set(priv, 1); 2037 if (ret) 2038 goto out_free_rx_ring; 2039 2040 /* Turn on TDMA */ 2041 ret = tdma_enable_set(priv, 1); 2042 if (ret) 2043 goto out_clear_rx_int; 2044 2045 /* Turn on UniMAC TX/RX */ 2046 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1); 2047 2048 bcm_sysport_netif_start(dev); 2049 2050 netif_tx_start_all_queues(dev); 2051 2052 return 0; 2053 2054 out_clear_rx_int: 2055 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL); 2056 out_free_rx_ring: 2057 bcm_sysport_fini_rx_ring(priv); 2058 out_free_tx_ring: 2059 for (i = 0; i < dev->num_tx_queues; i++) 2060 bcm_sysport_fini_tx_ring(priv, i); 2061 if (!priv->is_lite) 2062 free_irq(priv->irq1, dev); 2063 out_free_irq0: 2064 free_irq(priv->irq0, dev); 2065 out_phy_disconnect: 2066 phy_disconnect(phydev); 2067 out_clk_disable: 2068 clk_disable_unprepare(priv->clk); 2069 return ret; 2070 } 2071 2072 static void bcm_sysport_netif_stop(struct net_device *dev) 2073 { 2074 struct bcm_sysport_priv *priv = netdev_priv(dev); 2075 2076 /* stop all software from updating hardware */ 2077 netif_tx_disable(dev); 2078 napi_disable(&priv->napi); 2079 cancel_work_sync(&priv->dim.dim.work); 2080 phy_stop(dev->phydev); 2081 2082 /* mask all interrupts */ 2083 bcm_sysport_mask_all_intrs(priv); 2084 } 2085 2086 static int bcm_sysport_stop(struct net_device *dev) 2087 { 2088 struct bcm_sysport_priv *priv = netdev_priv(dev); 2089 unsigned int i; 2090 int ret; 2091 2092 bcm_sysport_netif_stop(dev); 2093 2094 /* Disable UniMAC RX */ 2095 umac_enable_set(priv, CMD_RX_EN, 0); 2096 2097 ret = tdma_enable_set(priv, 0); 2098 if (ret) { 2099 netdev_err(dev, "timeout disabling RDMA\n"); 2100 return ret; 2101 } 2102 2103 /* Wait for a maximum packet size to be drained */ 2104 usleep_range(2000, 3000); 2105 2106 ret = rdma_enable_set(priv, 0); 2107 if (ret) { 2108 netdev_err(dev, "timeout disabling TDMA\n"); 2109 return ret; 2110 } 2111 2112 /* Disable UniMAC TX */ 2113 umac_enable_set(priv, CMD_TX_EN, 0); 2114 2115 /* Free RX/TX rings SW structures */ 2116 for (i = 0; i < dev->num_tx_queues; i++) 2117 bcm_sysport_fini_tx_ring(priv, i); 2118 bcm_sysport_fini_rx_ring(priv); 2119 2120 free_irq(priv->irq0, dev); 2121 if (!priv->is_lite) 2122 free_irq(priv->irq1, dev); 2123 2124 /* Disconnect from PHY */ 2125 phy_disconnect(dev->phydev); 2126 2127 clk_disable_unprepare(priv->clk); 2128 2129 return 0; 2130 } 2131 2132 static int bcm_sysport_rule_find(struct bcm_sysport_priv *priv, 2133 u64 location) 2134 { 2135 unsigned int index; 2136 u32 reg; 2137 2138 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) { 2139 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index)); 2140 reg >>= RXCHK_BRCM_TAG_CID_SHIFT; 2141 reg &= RXCHK_BRCM_TAG_CID_MASK; 2142 if (reg == location) 2143 return index; 2144 } 2145 2146 return -EINVAL; 2147 } 2148 2149 static int bcm_sysport_rule_get(struct bcm_sysport_priv *priv, 2150 struct ethtool_rxnfc *nfc) 2151 { 2152 int index; 2153 2154 /* This is not a rule that we know about */ 2155 index = bcm_sysport_rule_find(priv, nfc->fs.location); 2156 if (index < 0) 2157 return -EOPNOTSUPP; 2158 2159 nfc->fs.ring_cookie = RX_CLS_FLOW_WAKE; 2160 2161 return 0; 2162 } 2163 2164 static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv, 2165 struct ethtool_rxnfc *nfc) 2166 { 2167 unsigned int index; 2168 u32 reg; 2169 2170 /* We cannot match locations greater than what the classification ID 2171 * permits (256 entries) 2172 */ 2173 if (nfc->fs.location > RXCHK_BRCM_TAG_CID_MASK) 2174 return -E2BIG; 2175 2176 /* We cannot support flows that are not destined for a wake-up */ 2177 if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE) 2178 return -EOPNOTSUPP; 2179 2180 /* All filters are already in use, we cannot match more rules */ 2181 if (bitmap_weight(priv->filters, RXCHK_BRCM_TAG_MAX) == 2182 RXCHK_BRCM_TAG_MAX) 2183 return -ENOSPC; 2184 2185 index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX); 2186 if (index >= RXCHK_BRCM_TAG_MAX) 2187 return -ENOSPC; 2188 2189 /* Location is the classification ID, and index is the position 2190 * within one of our 8 possible filters to be programmed 2191 */ 2192 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index)); 2193 reg &= ~(RXCHK_BRCM_TAG_CID_MASK << RXCHK_BRCM_TAG_CID_SHIFT); 2194 reg |= nfc->fs.location << RXCHK_BRCM_TAG_CID_SHIFT; 2195 rxchk_writel(priv, reg, RXCHK_BRCM_TAG(index)); 2196 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index)); 2197 2198 priv->filters_loc[index] = nfc->fs.location; 2199 set_bit(index, priv->filters); 2200 2201 return 0; 2202 } 2203 2204 static int bcm_sysport_rule_del(struct bcm_sysport_priv *priv, 2205 u64 location) 2206 { 2207 int index; 2208 2209 /* This is not a rule that we know about */ 2210 index = bcm_sysport_rule_find(priv, location); 2211 if (index < 0) 2212 return -EOPNOTSUPP; 2213 2214 /* No need to disable this filter if it was enabled, this will 2215 * be taken care of during suspend time by bcm_sysport_suspend_to_wol 2216 */ 2217 clear_bit(index, priv->filters); 2218 priv->filters_loc[index] = 0; 2219 2220 return 0; 2221 } 2222 2223 static int bcm_sysport_get_rxnfc(struct net_device *dev, 2224 struct ethtool_rxnfc *nfc, u32 *rule_locs) 2225 { 2226 struct bcm_sysport_priv *priv = netdev_priv(dev); 2227 int ret = -EOPNOTSUPP; 2228 2229 switch (nfc->cmd) { 2230 case ETHTOOL_GRXCLSRULE: 2231 ret = bcm_sysport_rule_get(priv, nfc); 2232 break; 2233 default: 2234 break; 2235 } 2236 2237 return ret; 2238 } 2239 2240 static int bcm_sysport_set_rxnfc(struct net_device *dev, 2241 struct ethtool_rxnfc *nfc) 2242 { 2243 struct bcm_sysport_priv *priv = netdev_priv(dev); 2244 int ret = -EOPNOTSUPP; 2245 2246 switch (nfc->cmd) { 2247 case ETHTOOL_SRXCLSRLINS: 2248 ret = bcm_sysport_rule_set(priv, nfc); 2249 break; 2250 case ETHTOOL_SRXCLSRLDEL: 2251 ret = bcm_sysport_rule_del(priv, nfc->fs.location); 2252 break; 2253 default: 2254 break; 2255 } 2256 2257 return ret; 2258 } 2259 2260 static const struct ethtool_ops bcm_sysport_ethtool_ops = { 2261 .supported_coalesce_params = ETHTOOL_COALESCE_USECS | 2262 ETHTOOL_COALESCE_MAX_FRAMES | 2263 ETHTOOL_COALESCE_USE_ADAPTIVE_RX, 2264 .get_drvinfo = bcm_sysport_get_drvinfo, 2265 .get_msglevel = bcm_sysport_get_msglvl, 2266 .set_msglevel = bcm_sysport_set_msglvl, 2267 .get_link = ethtool_op_get_link, 2268 .get_strings = bcm_sysport_get_strings, 2269 .get_ethtool_stats = bcm_sysport_get_stats, 2270 .get_sset_count = bcm_sysport_get_sset_count, 2271 .get_wol = bcm_sysport_get_wol, 2272 .set_wol = bcm_sysport_set_wol, 2273 .get_coalesce = bcm_sysport_get_coalesce, 2274 .set_coalesce = bcm_sysport_set_coalesce, 2275 .get_link_ksettings = phy_ethtool_get_link_ksettings, 2276 .set_link_ksettings = phy_ethtool_set_link_ksettings, 2277 .get_rxnfc = bcm_sysport_get_rxnfc, 2278 .set_rxnfc = bcm_sysport_set_rxnfc, 2279 }; 2280 2281 static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb, 2282 struct net_device *sb_dev) 2283 { 2284 struct bcm_sysport_priv *priv = netdev_priv(dev); 2285 u16 queue = skb_get_queue_mapping(skb); 2286 struct bcm_sysport_tx_ring *tx_ring; 2287 unsigned int q, port; 2288 2289 if (!netdev_uses_dsa(dev)) 2290 return netdev_pick_tx(dev, skb, NULL); 2291 2292 /* DSA tagging layer will have configured the correct queue */ 2293 q = BRCM_TAG_GET_QUEUE(queue); 2294 port = BRCM_TAG_GET_PORT(queue); 2295 tx_ring = priv->ring_map[q + port * priv->per_port_num_tx_queues]; 2296 2297 if (unlikely(!tx_ring)) 2298 return netdev_pick_tx(dev, skb, NULL); 2299 2300 return tx_ring->index; 2301 } 2302 2303 static const struct net_device_ops bcm_sysport_netdev_ops = { 2304 .ndo_start_xmit = bcm_sysport_xmit, 2305 .ndo_tx_timeout = bcm_sysport_tx_timeout, 2306 .ndo_open = bcm_sysport_open, 2307 .ndo_stop = bcm_sysport_stop, 2308 .ndo_set_features = bcm_sysport_set_features, 2309 .ndo_set_rx_mode = bcm_sysport_set_rx_mode, 2310 .ndo_set_mac_address = bcm_sysport_change_mac, 2311 #ifdef CONFIG_NET_POLL_CONTROLLER 2312 .ndo_poll_controller = bcm_sysport_poll_controller, 2313 #endif 2314 .ndo_get_stats64 = bcm_sysport_get_stats64, 2315 .ndo_select_queue = bcm_sysport_select_queue, 2316 }; 2317 2318 static int bcm_sysport_map_queues(struct net_device *dev, 2319 struct net_device *slave_dev) 2320 { 2321 struct dsa_port *dp = dsa_port_from_netdev(slave_dev); 2322 struct bcm_sysport_priv *priv = netdev_priv(dev); 2323 struct bcm_sysport_tx_ring *ring; 2324 unsigned int num_tx_queues; 2325 unsigned int q, qp, port; 2326 2327 /* We can't be setting up queue inspection for non directly attached 2328 * switches 2329 */ 2330 if (dp->ds->index) 2331 return 0; 2332 2333 port = dp->index; 2334 2335 /* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a 2336 * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of 2337 * per-port (slave_dev) network devices queue, we achieve just that. 2338 * This need to happen now before any slave network device is used such 2339 * it accurately reflects the number of real TX queues. 2340 */ 2341 if (priv->is_lite) 2342 netif_set_real_num_tx_queues(slave_dev, 2343 slave_dev->num_tx_queues / 2); 2344 2345 num_tx_queues = slave_dev->real_num_tx_queues; 2346 2347 if (priv->per_port_num_tx_queues && 2348 priv->per_port_num_tx_queues != num_tx_queues) 2349 netdev_warn(slave_dev, "asymmetric number of per-port queues\n"); 2350 2351 priv->per_port_num_tx_queues = num_tx_queues; 2352 2353 for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues; 2354 q++) { 2355 ring = &priv->tx_rings[q]; 2356 2357 if (ring->inspect) 2358 continue; 2359 2360 /* Just remember the mapping actual programming done 2361 * during bcm_sysport_init_tx_ring 2362 */ 2363 ring->switch_queue = qp; 2364 ring->switch_port = port; 2365 ring->inspect = true; 2366 priv->ring_map[qp + port * num_tx_queues] = ring; 2367 qp++; 2368 } 2369 2370 return 0; 2371 } 2372 2373 static int bcm_sysport_unmap_queues(struct net_device *dev, 2374 struct net_device *slave_dev) 2375 { 2376 struct dsa_port *dp = dsa_port_from_netdev(slave_dev); 2377 struct bcm_sysport_priv *priv = netdev_priv(dev); 2378 struct bcm_sysport_tx_ring *ring; 2379 unsigned int num_tx_queues; 2380 unsigned int q, qp, port; 2381 2382 port = dp->index; 2383 2384 num_tx_queues = slave_dev->real_num_tx_queues; 2385 2386 for (q = 0; q < dev->num_tx_queues; q++) { 2387 ring = &priv->tx_rings[q]; 2388 2389 if (ring->switch_port != port) 2390 continue; 2391 2392 if (!ring->inspect) 2393 continue; 2394 2395 ring->inspect = false; 2396 qp = ring->switch_queue; 2397 priv->ring_map[qp + port * num_tx_queues] = NULL; 2398 } 2399 2400 return 0; 2401 } 2402 2403 static int bcm_sysport_netdevice_event(struct notifier_block *nb, 2404 unsigned long event, void *ptr) 2405 { 2406 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2407 struct netdev_notifier_changeupper_info *info = ptr; 2408 struct bcm_sysport_priv *priv; 2409 int ret = 0; 2410 2411 priv = container_of(nb, struct bcm_sysport_priv, netdev_notifier); 2412 if (priv->netdev != dev) 2413 return NOTIFY_DONE; 2414 2415 switch (event) { 2416 case NETDEV_CHANGEUPPER: 2417 if (dev->netdev_ops != &bcm_sysport_netdev_ops) 2418 return NOTIFY_DONE; 2419 2420 if (!dsa_slave_dev_check(info->upper_dev)) 2421 return NOTIFY_DONE; 2422 2423 if (info->linking) 2424 ret = bcm_sysport_map_queues(dev, info->upper_dev); 2425 else 2426 ret = bcm_sysport_unmap_queues(dev, info->upper_dev); 2427 break; 2428 } 2429 2430 return notifier_from_errno(ret); 2431 } 2432 2433 #define REV_FMT "v%2x.%02x" 2434 2435 static const struct bcm_sysport_hw_params bcm_sysport_params[] = { 2436 [SYSTEMPORT] = { 2437 .is_lite = false, 2438 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS, 2439 }, 2440 [SYSTEMPORT_LITE] = { 2441 .is_lite = true, 2442 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS, 2443 }, 2444 }; 2445 2446 static const struct of_device_id bcm_sysport_of_match[] = { 2447 { .compatible = "brcm,systemportlite-v1.00", 2448 .data = &bcm_sysport_params[SYSTEMPORT_LITE] }, 2449 { .compatible = "brcm,systemport-v1.00", 2450 .data = &bcm_sysport_params[SYSTEMPORT] }, 2451 { .compatible = "brcm,systemport", 2452 .data = &bcm_sysport_params[SYSTEMPORT] }, 2453 { /* sentinel */ } 2454 }; 2455 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match); 2456 2457 static int bcm_sysport_probe(struct platform_device *pdev) 2458 { 2459 const struct bcm_sysport_hw_params *params; 2460 const struct of_device_id *of_id = NULL; 2461 struct bcm_sysport_priv *priv; 2462 struct device_node *dn; 2463 struct net_device *dev; 2464 u32 txq, rxq; 2465 int ret; 2466 2467 dn = pdev->dev.of_node; 2468 of_id = of_match_node(bcm_sysport_of_match, dn); 2469 if (!of_id || !of_id->data) 2470 return -EINVAL; 2471 2472 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40)); 2473 if (ret) 2474 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 2475 if (ret) { 2476 dev_err(&pdev->dev, "unable to set DMA mask: %d\n", ret); 2477 return ret; 2478 } 2479 2480 /* Fairly quickly we need to know the type of adapter we have */ 2481 params = of_id->data; 2482 2483 /* Read the Transmit/Receive Queue properties */ 2484 if (of_property_read_u32(dn, "systemport,num-txq", &txq)) 2485 txq = TDMA_NUM_RINGS; 2486 if (of_property_read_u32(dn, "systemport,num-rxq", &rxq)) 2487 rxq = 1; 2488 2489 /* Sanity check the number of transmit queues */ 2490 if (!txq || txq > TDMA_NUM_RINGS) 2491 return -EINVAL; 2492 2493 dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq); 2494 if (!dev) 2495 return -ENOMEM; 2496 2497 /* Initialize private members */ 2498 priv = netdev_priv(dev); 2499 2500 priv->clk = devm_clk_get_optional(&pdev->dev, "sw_sysport"); 2501 if (IS_ERR(priv->clk)) { 2502 ret = PTR_ERR(priv->clk); 2503 goto err_free_netdev; 2504 } 2505 2506 /* Allocate number of TX rings */ 2507 priv->tx_rings = devm_kcalloc(&pdev->dev, txq, 2508 sizeof(struct bcm_sysport_tx_ring), 2509 GFP_KERNEL); 2510 if (!priv->tx_rings) { 2511 ret = -ENOMEM; 2512 goto err_free_netdev; 2513 } 2514 2515 priv->is_lite = params->is_lite; 2516 priv->num_rx_desc_words = params->num_rx_desc_words; 2517 2518 priv->irq0 = platform_get_irq(pdev, 0); 2519 if (!priv->is_lite) { 2520 priv->irq1 = platform_get_irq(pdev, 1); 2521 priv->wol_irq = platform_get_irq(pdev, 2); 2522 } else { 2523 priv->wol_irq = platform_get_irq(pdev, 1); 2524 } 2525 if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) { 2526 ret = -EINVAL; 2527 goto err_free_netdev; 2528 } 2529 2530 priv->base = devm_platform_ioremap_resource(pdev, 0); 2531 if (IS_ERR(priv->base)) { 2532 ret = PTR_ERR(priv->base); 2533 goto err_free_netdev; 2534 } 2535 2536 priv->netdev = dev; 2537 priv->pdev = pdev; 2538 2539 ret = of_get_phy_mode(dn, &priv->phy_interface); 2540 /* Default to GMII interface mode */ 2541 if (ret) 2542 priv->phy_interface = PHY_INTERFACE_MODE_GMII; 2543 2544 /* In the case of a fixed PHY, the DT node associated 2545 * to the PHY is the Ethernet MAC DT node. 2546 */ 2547 if (of_phy_is_fixed_link(dn)) { 2548 ret = of_phy_register_fixed_link(dn); 2549 if (ret) { 2550 dev_err(&pdev->dev, "failed to register fixed PHY\n"); 2551 goto err_free_netdev; 2552 } 2553 2554 priv->phy_dn = dn; 2555 } 2556 2557 /* Initialize netdevice members */ 2558 ret = of_get_ethdev_address(dn, dev); 2559 if (ret) { 2560 dev_warn(&pdev->dev, "using random Ethernet MAC\n"); 2561 eth_hw_addr_random(dev); 2562 } 2563 2564 SET_NETDEV_DEV(dev, &pdev->dev); 2565 dev_set_drvdata(&pdev->dev, dev); 2566 dev->ethtool_ops = &bcm_sysport_ethtool_ops; 2567 dev->netdev_ops = &bcm_sysport_netdev_ops; 2568 netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64); 2569 2570 dev->features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA | 2571 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 2572 NETIF_F_HW_VLAN_CTAG_TX; 2573 dev->hw_features |= dev->features; 2574 dev->vlan_features |= dev->features; 2575 dev->max_mtu = UMAC_MAX_MTU_SIZE; 2576 2577 /* Request the WOL interrupt and advertise suspend if available */ 2578 priv->wol_irq_disabled = 1; 2579 ret = devm_request_irq(&pdev->dev, priv->wol_irq, 2580 bcm_sysport_wol_isr, 0, dev->name, priv); 2581 if (!ret) 2582 device_set_wakeup_capable(&pdev->dev, 1); 2583 2584 priv->wol_clk = devm_clk_get_optional(&pdev->dev, "sw_sysportwol"); 2585 if (IS_ERR(priv->wol_clk)) 2586 return PTR_ERR(priv->wol_clk); 2587 2588 /* Set the needed headroom once and for all */ 2589 BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8); 2590 dev->needed_headroom += sizeof(struct bcm_tsb); 2591 2592 /* libphy will adjust the link state accordingly */ 2593 netif_carrier_off(dev); 2594 2595 priv->rx_max_coalesced_frames = 1; 2596 u64_stats_init(&priv->syncp); 2597 2598 priv->netdev_notifier.notifier_call = bcm_sysport_netdevice_event; 2599 2600 ret = register_netdevice_notifier(&priv->netdev_notifier); 2601 if (ret) { 2602 dev_err(&pdev->dev, "failed to register DSA notifier\n"); 2603 goto err_deregister_fixed_link; 2604 } 2605 2606 ret = register_netdev(dev); 2607 if (ret) { 2608 dev_err(&pdev->dev, "failed to register net_device\n"); 2609 goto err_deregister_notifier; 2610 } 2611 2612 clk_prepare_enable(priv->clk); 2613 2614 priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK; 2615 dev_info(&pdev->dev, 2616 "Broadcom SYSTEMPORT%s " REV_FMT 2617 " (irqs: %d, %d, TXQs: %d, RXQs: %d)\n", 2618 priv->is_lite ? " Lite" : "", 2619 (priv->rev >> 8) & 0xff, priv->rev & 0xff, 2620 priv->irq0, priv->irq1, txq, rxq); 2621 2622 clk_disable_unprepare(priv->clk); 2623 2624 return 0; 2625 2626 err_deregister_notifier: 2627 unregister_netdevice_notifier(&priv->netdev_notifier); 2628 err_deregister_fixed_link: 2629 if (of_phy_is_fixed_link(dn)) 2630 of_phy_deregister_fixed_link(dn); 2631 err_free_netdev: 2632 free_netdev(dev); 2633 return ret; 2634 } 2635 2636 static int bcm_sysport_remove(struct platform_device *pdev) 2637 { 2638 struct net_device *dev = dev_get_drvdata(&pdev->dev); 2639 struct bcm_sysport_priv *priv = netdev_priv(dev); 2640 struct device_node *dn = pdev->dev.of_node; 2641 2642 /* Not much to do, ndo_close has been called 2643 * and we use managed allocations 2644 */ 2645 unregister_netdevice_notifier(&priv->netdev_notifier); 2646 unregister_netdev(dev); 2647 if (of_phy_is_fixed_link(dn)) 2648 of_phy_deregister_fixed_link(dn); 2649 free_netdev(dev); 2650 dev_set_drvdata(&pdev->dev, NULL); 2651 2652 return 0; 2653 } 2654 2655 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv) 2656 { 2657 struct net_device *ndev = priv->netdev; 2658 unsigned int timeout = 1000; 2659 unsigned int index, i = 0; 2660 u32 reg; 2661 2662 reg = umac_readl(priv, UMAC_MPD_CTRL); 2663 if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE)) 2664 reg |= MPD_EN; 2665 reg &= ~PSW_EN; 2666 if (priv->wolopts & WAKE_MAGICSECURE) { 2667 /* Program the SecureOn password */ 2668 umac_writel(priv, get_unaligned_be16(&priv->sopass[0]), 2669 UMAC_PSW_MS); 2670 umac_writel(priv, get_unaligned_be32(&priv->sopass[2]), 2671 UMAC_PSW_LS); 2672 reg |= PSW_EN; 2673 } 2674 umac_writel(priv, reg, UMAC_MPD_CTRL); 2675 2676 if (priv->wolopts & WAKE_FILTER) { 2677 /* Turn on ACPI matching to steal packets from RBUF */ 2678 reg = rbuf_readl(priv, RBUF_CONTROL); 2679 if (priv->is_lite) 2680 reg |= RBUF_ACPI_EN_LITE; 2681 else 2682 reg |= RBUF_ACPI_EN; 2683 rbuf_writel(priv, reg, RBUF_CONTROL); 2684 2685 /* Enable RXCHK, active filters and Broadcom tag matching */ 2686 reg = rxchk_readl(priv, RXCHK_CONTROL); 2687 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK << 2688 RXCHK_BRCM_TAG_MATCH_SHIFT); 2689 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) { 2690 reg |= BIT(RXCHK_BRCM_TAG_MATCH_SHIFT + i); 2691 i++; 2692 } 2693 reg |= RXCHK_EN | RXCHK_BRCM_TAG_EN; 2694 rxchk_writel(priv, reg, RXCHK_CONTROL); 2695 } 2696 2697 /* Make sure RBUF entered WoL mode as result */ 2698 do { 2699 reg = rbuf_readl(priv, RBUF_STATUS); 2700 if (reg & RBUF_WOL_MODE) 2701 break; 2702 2703 udelay(10); 2704 } while (timeout-- > 0); 2705 2706 /* Do not leave the UniMAC RBUF matching only MPD packets */ 2707 if (!timeout) { 2708 mpd_enable_set(priv, false); 2709 netif_err(priv, wol, ndev, "failed to enter WOL mode\n"); 2710 return -ETIMEDOUT; 2711 } 2712 2713 /* UniMAC receive needs to be turned on */ 2714 umac_enable_set(priv, CMD_RX_EN, 1); 2715 2716 netif_dbg(priv, wol, ndev, "entered WOL mode\n"); 2717 2718 return 0; 2719 } 2720 2721 static int __maybe_unused bcm_sysport_suspend(struct device *d) 2722 { 2723 struct net_device *dev = dev_get_drvdata(d); 2724 struct bcm_sysport_priv *priv = netdev_priv(dev); 2725 unsigned int i; 2726 int ret = 0; 2727 u32 reg; 2728 2729 if (!netif_running(dev)) 2730 return 0; 2731 2732 netif_device_detach(dev); 2733 2734 bcm_sysport_netif_stop(dev); 2735 2736 phy_suspend(dev->phydev); 2737 2738 /* Disable UniMAC RX */ 2739 umac_enable_set(priv, CMD_RX_EN, 0); 2740 2741 ret = rdma_enable_set(priv, 0); 2742 if (ret) { 2743 netdev_err(dev, "RDMA timeout!\n"); 2744 return ret; 2745 } 2746 2747 /* Disable RXCHK if enabled */ 2748 if (priv->rx_chk_en) { 2749 reg = rxchk_readl(priv, RXCHK_CONTROL); 2750 reg &= ~RXCHK_EN; 2751 rxchk_writel(priv, reg, RXCHK_CONTROL); 2752 } 2753 2754 /* Flush RX pipe */ 2755 if (!priv->wolopts) 2756 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL); 2757 2758 ret = tdma_enable_set(priv, 0); 2759 if (ret) { 2760 netdev_err(dev, "TDMA timeout!\n"); 2761 return ret; 2762 } 2763 2764 /* Wait for a packet boundary */ 2765 usleep_range(2000, 3000); 2766 2767 umac_enable_set(priv, CMD_TX_EN, 0); 2768 2769 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL); 2770 2771 /* Free RX/TX rings SW structures */ 2772 for (i = 0; i < dev->num_tx_queues; i++) 2773 bcm_sysport_fini_tx_ring(priv, i); 2774 bcm_sysport_fini_rx_ring(priv); 2775 2776 /* Get prepared for Wake-on-LAN */ 2777 if (device_may_wakeup(d) && priv->wolopts) { 2778 clk_prepare_enable(priv->wol_clk); 2779 ret = bcm_sysport_suspend_to_wol(priv); 2780 } 2781 2782 clk_disable_unprepare(priv->clk); 2783 2784 return ret; 2785 } 2786 2787 static int __maybe_unused bcm_sysport_resume(struct device *d) 2788 { 2789 struct net_device *dev = dev_get_drvdata(d); 2790 struct bcm_sysport_priv *priv = netdev_priv(dev); 2791 unsigned int i; 2792 int ret; 2793 2794 if (!netif_running(dev)) 2795 return 0; 2796 2797 clk_prepare_enable(priv->clk); 2798 if (priv->wolopts) 2799 clk_disable_unprepare(priv->wol_clk); 2800 2801 umac_reset(priv); 2802 2803 /* Disable the UniMAC RX/TX */ 2804 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0); 2805 2806 /* We may have been suspended and never received a WOL event that 2807 * would turn off MPD detection, take care of that now 2808 */ 2809 bcm_sysport_resume_from_wol(priv); 2810 2811 /* Initialize both hardware and software ring */ 2812 for (i = 0; i < dev->num_tx_queues; i++) { 2813 ret = bcm_sysport_init_tx_ring(priv, i); 2814 if (ret) { 2815 netdev_err(dev, "failed to initialize TX ring %d\n", 2816 i); 2817 goto out_free_tx_rings; 2818 } 2819 } 2820 2821 /* Initialize linked-list */ 2822 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS); 2823 2824 /* Initialize RX ring */ 2825 ret = bcm_sysport_init_rx_ring(priv); 2826 if (ret) { 2827 netdev_err(dev, "failed to initialize RX ring\n"); 2828 goto out_free_rx_ring; 2829 } 2830 2831 /* RX pipe enable */ 2832 topctrl_writel(priv, 0, RX_FLUSH_CNTL); 2833 2834 ret = rdma_enable_set(priv, 1); 2835 if (ret) { 2836 netdev_err(dev, "failed to enable RDMA\n"); 2837 goto out_free_rx_ring; 2838 } 2839 2840 /* Restore enabled features */ 2841 bcm_sysport_set_features(dev, dev->features); 2842 2843 rbuf_init(priv); 2844 2845 /* Set maximum frame length */ 2846 if (!priv->is_lite) 2847 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN); 2848 else 2849 gib_set_pad_extension(priv); 2850 2851 /* Set MAC address */ 2852 umac_set_hw_addr(priv, dev->dev_addr); 2853 2854 umac_enable_set(priv, CMD_RX_EN, 1); 2855 2856 /* TX pipe enable */ 2857 topctrl_writel(priv, 0, TX_FLUSH_CNTL); 2858 2859 umac_enable_set(priv, CMD_TX_EN, 1); 2860 2861 ret = tdma_enable_set(priv, 1); 2862 if (ret) { 2863 netdev_err(dev, "TDMA timeout!\n"); 2864 goto out_free_rx_ring; 2865 } 2866 2867 phy_resume(dev->phydev); 2868 2869 bcm_sysport_netif_start(dev); 2870 2871 netif_device_attach(dev); 2872 2873 return 0; 2874 2875 out_free_rx_ring: 2876 bcm_sysport_fini_rx_ring(priv); 2877 out_free_tx_rings: 2878 for (i = 0; i < dev->num_tx_queues; i++) 2879 bcm_sysport_fini_tx_ring(priv, i); 2880 clk_disable_unprepare(priv->clk); 2881 return ret; 2882 } 2883 2884 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops, 2885 bcm_sysport_suspend, bcm_sysport_resume); 2886 2887 static struct platform_driver bcm_sysport_driver = { 2888 .probe = bcm_sysport_probe, 2889 .remove = bcm_sysport_remove, 2890 .driver = { 2891 .name = "brcm-systemport", 2892 .of_match_table = bcm_sysport_of_match, 2893 .pm = &bcm_sysport_pm_ops, 2894 }, 2895 }; 2896 module_platform_driver(bcm_sysport_driver); 2897 2898 MODULE_AUTHOR("Broadcom Corporation"); 2899 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver"); 2900 MODULE_ALIAS("platform:brcm-systemport"); 2901 MODULE_LICENSE("GPL"); 2902