1 /* 10G controller driver for Samsung SoCs 2 * 3 * Copyright (C) 2013 Samsung Electronics Co., Ltd. 4 * http://www.samsung.com 5 * 6 * Author: Siva Reddy Kallam <siva.kallam@samsung.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 14 15 #include <linux/clk.h> 16 #include <linux/interrupt.h> 17 #include <linux/kernel.h> 18 #include <linux/netdevice.h> 19 #include <linux/net_tstamp.h> 20 #include <linux/phy.h> 21 #include <linux/ptp_clock_kernel.h> 22 23 #include "sxgbe_common.h" 24 #include "sxgbe_reg.h" 25 #include "sxgbe_dma.h" 26 27 struct sxgbe_stats { 28 char stat_string[ETH_GSTRING_LEN]; 29 int sizeof_stat; 30 int stat_offset; 31 }; 32 33 #define SXGBE_STAT(m) \ 34 { \ 35 #m, \ 36 FIELD_SIZEOF(struct sxgbe_extra_stats, m), \ 37 offsetof(struct sxgbe_priv_data, xstats.m) \ 38 } 39 40 static const struct sxgbe_stats sxgbe_gstrings_stats[] = { 41 /* TX/RX IRQ events */ 42 SXGBE_STAT(tx_process_stopped_irq), 43 SXGBE_STAT(tx_ctxt_desc_err), 44 SXGBE_STAT(tx_threshold), 45 SXGBE_STAT(rx_threshold), 46 SXGBE_STAT(tx_pkt_n), 47 SXGBE_STAT(rx_pkt_n), 48 SXGBE_STAT(normal_irq_n), 49 SXGBE_STAT(tx_normal_irq_n), 50 SXGBE_STAT(rx_normal_irq_n), 51 SXGBE_STAT(napi_poll), 52 SXGBE_STAT(tx_clean), 53 SXGBE_STAT(tx_reset_ic_bit), 54 SXGBE_STAT(rx_process_stopped_irq), 55 SXGBE_STAT(rx_underflow_irq), 56 57 /* Bus access errors */ 58 SXGBE_STAT(fatal_bus_error_irq), 59 SXGBE_STAT(tx_read_transfer_err), 60 SXGBE_STAT(tx_write_transfer_err), 61 SXGBE_STAT(tx_desc_access_err), 62 SXGBE_STAT(tx_buffer_access_err), 63 SXGBE_STAT(tx_data_transfer_err), 64 SXGBE_STAT(rx_read_transfer_err), 65 SXGBE_STAT(rx_write_transfer_err), 66 SXGBE_STAT(rx_desc_access_err), 67 SXGBE_STAT(rx_buffer_access_err), 68 SXGBE_STAT(rx_data_transfer_err), 69 70 /* EEE-LPI stats */ 71 SXGBE_STAT(tx_lpi_entry_n), 72 SXGBE_STAT(tx_lpi_exit_n), 73 SXGBE_STAT(rx_lpi_entry_n), 74 SXGBE_STAT(rx_lpi_exit_n), 75 SXGBE_STAT(eee_wakeup_error_n), 76 77 /* RX specific */ 78 /* L2 error */ 79 SXGBE_STAT(rx_code_gmii_err), 80 SXGBE_STAT(rx_watchdog_err), 81 SXGBE_STAT(rx_crc_err), 82 SXGBE_STAT(rx_gaint_pkt_err), 83 SXGBE_STAT(ip_hdr_err), 84 SXGBE_STAT(ip_payload_err), 85 SXGBE_STAT(overflow_error), 86 87 /* L2 Pkt type */ 88 SXGBE_STAT(len_pkt), 89 SXGBE_STAT(mac_ctl_pkt), 90 SXGBE_STAT(dcb_ctl_pkt), 91 SXGBE_STAT(arp_pkt), 92 SXGBE_STAT(oam_pkt), 93 SXGBE_STAT(untag_okt), 94 SXGBE_STAT(other_pkt), 95 SXGBE_STAT(svlan_tag_pkt), 96 SXGBE_STAT(cvlan_tag_pkt), 97 SXGBE_STAT(dvlan_ocvlan_icvlan_pkt), 98 SXGBE_STAT(dvlan_osvlan_isvlan_pkt), 99 SXGBE_STAT(dvlan_osvlan_icvlan_pkt), 100 SXGBE_STAT(dvan_ocvlan_icvlan_pkt), 101 102 /* L3/L4 Pkt type */ 103 SXGBE_STAT(not_ip_pkt), 104 SXGBE_STAT(ip4_tcp_pkt), 105 SXGBE_STAT(ip4_udp_pkt), 106 SXGBE_STAT(ip4_icmp_pkt), 107 SXGBE_STAT(ip4_unknown_pkt), 108 SXGBE_STAT(ip6_tcp_pkt), 109 SXGBE_STAT(ip6_udp_pkt), 110 SXGBE_STAT(ip6_icmp_pkt), 111 SXGBE_STAT(ip6_unknown_pkt), 112 113 /* Filter specific */ 114 SXGBE_STAT(vlan_filter_match), 115 SXGBE_STAT(sa_filter_fail), 116 SXGBE_STAT(da_filter_fail), 117 SXGBE_STAT(hash_filter_pass), 118 SXGBE_STAT(l3_filter_match), 119 SXGBE_STAT(l4_filter_match), 120 121 /* RX context specific */ 122 SXGBE_STAT(timestamp_dropped), 123 SXGBE_STAT(rx_msg_type_no_ptp), 124 SXGBE_STAT(rx_ptp_type_sync), 125 SXGBE_STAT(rx_ptp_type_follow_up), 126 SXGBE_STAT(rx_ptp_type_delay_req), 127 SXGBE_STAT(rx_ptp_type_delay_resp), 128 SXGBE_STAT(rx_ptp_type_pdelay_req), 129 SXGBE_STAT(rx_ptp_type_pdelay_resp), 130 SXGBE_STAT(rx_ptp_type_pdelay_follow_up), 131 SXGBE_STAT(rx_ptp_announce), 132 SXGBE_STAT(rx_ptp_mgmt), 133 SXGBE_STAT(rx_ptp_signal), 134 SXGBE_STAT(rx_ptp_resv_msg_type), 135 }; 136 #define SXGBE_STATS_LEN ARRAY_SIZE(sxgbe_gstrings_stats) 137 138 static int sxgbe_get_eee(struct net_device *dev, 139 struct ethtool_eee *edata) 140 { 141 struct sxgbe_priv_data *priv = netdev_priv(dev); 142 143 if (!priv->hw_cap.eee) 144 return -EOPNOTSUPP; 145 146 edata->eee_enabled = priv->eee_enabled; 147 edata->eee_active = priv->eee_active; 148 edata->tx_lpi_timer = priv->tx_lpi_timer; 149 150 return phy_ethtool_get_eee(dev->phydev, edata); 151 } 152 153 static int sxgbe_set_eee(struct net_device *dev, 154 struct ethtool_eee *edata) 155 { 156 struct sxgbe_priv_data *priv = netdev_priv(dev); 157 158 priv->eee_enabled = edata->eee_enabled; 159 160 if (!priv->eee_enabled) { 161 sxgbe_disable_eee_mode(priv); 162 } else { 163 /* We are asking for enabling the EEE but it is safe 164 * to verify all by invoking the eee_init function. 165 * In case of failure it will return an error. 166 */ 167 priv->eee_enabled = sxgbe_eee_init(priv); 168 if (!priv->eee_enabled) 169 return -EOPNOTSUPP; 170 171 /* Do not change tx_lpi_timer in case of failure */ 172 priv->tx_lpi_timer = edata->tx_lpi_timer; 173 } 174 175 return phy_ethtool_set_eee(dev->phydev, edata); 176 } 177 178 static void sxgbe_getdrvinfo(struct net_device *dev, 179 struct ethtool_drvinfo *info) 180 { 181 strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); 182 strlcpy(info->version, DRV_VERSION, sizeof(info->version)); 183 } 184 185 static u32 sxgbe_getmsglevel(struct net_device *dev) 186 { 187 struct sxgbe_priv_data *priv = netdev_priv(dev); 188 return priv->msg_enable; 189 } 190 191 static void sxgbe_setmsglevel(struct net_device *dev, u32 level) 192 { 193 struct sxgbe_priv_data *priv = netdev_priv(dev); 194 priv->msg_enable = level; 195 } 196 197 static void sxgbe_get_strings(struct net_device *dev, u32 stringset, u8 *data) 198 { 199 int i; 200 u8 *p = data; 201 202 switch (stringset) { 203 case ETH_SS_STATS: 204 for (i = 0; i < SXGBE_STATS_LEN; i++) { 205 memcpy(p, sxgbe_gstrings_stats[i].stat_string, 206 ETH_GSTRING_LEN); 207 p += ETH_GSTRING_LEN; 208 } 209 break; 210 default: 211 WARN_ON(1); 212 break; 213 } 214 } 215 216 static int sxgbe_get_sset_count(struct net_device *netdev, int sset) 217 { 218 int len; 219 220 switch (sset) { 221 case ETH_SS_STATS: 222 len = SXGBE_STATS_LEN; 223 return len; 224 default: 225 return -EINVAL; 226 } 227 } 228 229 static void sxgbe_get_ethtool_stats(struct net_device *dev, 230 struct ethtool_stats *dummy, u64 *data) 231 { 232 struct sxgbe_priv_data *priv = netdev_priv(dev); 233 int i; 234 char *p; 235 236 if (priv->eee_enabled) { 237 int val = phy_get_eee_err(dev->phydev); 238 239 if (val) 240 priv->xstats.eee_wakeup_error_n = val; 241 } 242 243 for (i = 0; i < SXGBE_STATS_LEN; i++) { 244 p = (char *)priv + sxgbe_gstrings_stats[i].stat_offset; 245 data[i] = (sxgbe_gstrings_stats[i].sizeof_stat == sizeof(u64)) 246 ? (*(u64 *)p) : (*(u32 *)p); 247 } 248 } 249 250 static void sxgbe_get_channels(struct net_device *dev, 251 struct ethtool_channels *channel) 252 { 253 channel->max_rx = SXGBE_MAX_RX_CHANNELS; 254 channel->max_tx = SXGBE_MAX_TX_CHANNELS; 255 channel->rx_count = SXGBE_RX_QUEUES; 256 channel->tx_count = SXGBE_TX_QUEUES; 257 } 258 259 static u32 sxgbe_riwt2usec(u32 riwt, struct sxgbe_priv_data *priv) 260 { 261 unsigned long clk = clk_get_rate(priv->sxgbe_clk); 262 263 if (!clk) 264 return 0; 265 266 return (riwt * 256) / (clk / 1000000); 267 } 268 269 static u32 sxgbe_usec2riwt(u32 usec, struct sxgbe_priv_data *priv) 270 { 271 unsigned long clk = clk_get_rate(priv->sxgbe_clk); 272 273 if (!clk) 274 return 0; 275 276 return (usec * (clk / 1000000)) / 256; 277 } 278 279 static int sxgbe_get_coalesce(struct net_device *dev, 280 struct ethtool_coalesce *ec) 281 { 282 struct sxgbe_priv_data *priv = netdev_priv(dev); 283 284 if (priv->use_riwt) 285 ec->rx_coalesce_usecs = sxgbe_riwt2usec(priv->rx_riwt, priv); 286 287 return 0; 288 } 289 290 static int sxgbe_set_coalesce(struct net_device *dev, 291 struct ethtool_coalesce *ec) 292 { 293 struct sxgbe_priv_data *priv = netdev_priv(dev); 294 unsigned int rx_riwt; 295 296 if (!ec->rx_coalesce_usecs) 297 return -EINVAL; 298 299 rx_riwt = sxgbe_usec2riwt(ec->rx_coalesce_usecs, priv); 300 301 if ((rx_riwt > SXGBE_MAX_DMA_RIWT) || (rx_riwt < SXGBE_MIN_DMA_RIWT)) 302 return -EINVAL; 303 else if (!priv->use_riwt) 304 return -EOPNOTSUPP; 305 306 priv->rx_riwt = rx_riwt; 307 priv->hw->dma->rx_watchdog(priv->ioaddr, priv->rx_riwt); 308 309 return 0; 310 } 311 312 static int sxgbe_get_rss_hash_opts(struct sxgbe_priv_data *priv, 313 struct ethtool_rxnfc *cmd) 314 { 315 cmd->data = 0; 316 317 /* Report default options for RSS on sxgbe */ 318 switch (cmd->flow_type) { 319 case TCP_V4_FLOW: 320 case UDP_V4_FLOW: 321 cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3; 322 case SCTP_V4_FLOW: 323 case AH_ESP_V4_FLOW: 324 case AH_V4_FLOW: 325 case ESP_V4_FLOW: 326 case IPV4_FLOW: 327 cmd->data |= RXH_IP_SRC | RXH_IP_DST; 328 break; 329 case TCP_V6_FLOW: 330 case UDP_V6_FLOW: 331 cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3; 332 case SCTP_V6_FLOW: 333 case AH_ESP_V6_FLOW: 334 case AH_V6_FLOW: 335 case ESP_V6_FLOW: 336 case IPV6_FLOW: 337 cmd->data |= RXH_IP_SRC | RXH_IP_DST; 338 break; 339 default: 340 return -EINVAL; 341 } 342 343 return 0; 344 } 345 346 static int sxgbe_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd, 347 u32 *rule_locs) 348 { 349 struct sxgbe_priv_data *priv = netdev_priv(dev); 350 int ret = -EOPNOTSUPP; 351 352 switch (cmd->cmd) { 353 case ETHTOOL_GRXFH: 354 ret = sxgbe_get_rss_hash_opts(priv, cmd); 355 break; 356 default: 357 break; 358 } 359 360 return ret; 361 } 362 363 static int sxgbe_set_rss_hash_opt(struct sxgbe_priv_data *priv, 364 struct ethtool_rxnfc *cmd) 365 { 366 u32 reg_val = 0; 367 368 /* RSS does not support anything other than hashing 369 * to queues on src and dst IPs and ports 370 */ 371 if (cmd->data & ~(RXH_IP_SRC | RXH_IP_DST | 372 RXH_L4_B_0_1 | RXH_L4_B_2_3)) 373 return -EINVAL; 374 375 switch (cmd->flow_type) { 376 case TCP_V4_FLOW: 377 case TCP_V6_FLOW: 378 if (!(cmd->data & RXH_IP_SRC) || 379 !(cmd->data & RXH_IP_DST) || 380 !(cmd->data & RXH_L4_B_0_1) || 381 !(cmd->data & RXH_L4_B_2_3)) 382 return -EINVAL; 383 reg_val = SXGBE_CORE_RSS_CTL_TCP4TE; 384 break; 385 case UDP_V4_FLOW: 386 case UDP_V6_FLOW: 387 if (!(cmd->data & RXH_IP_SRC) || 388 !(cmd->data & RXH_IP_DST) || 389 !(cmd->data & RXH_L4_B_0_1) || 390 !(cmd->data & RXH_L4_B_2_3)) 391 return -EINVAL; 392 reg_val = SXGBE_CORE_RSS_CTL_UDP4TE; 393 break; 394 case SCTP_V4_FLOW: 395 case AH_ESP_V4_FLOW: 396 case AH_V4_FLOW: 397 case ESP_V4_FLOW: 398 case AH_ESP_V6_FLOW: 399 case AH_V6_FLOW: 400 case ESP_V6_FLOW: 401 case SCTP_V6_FLOW: 402 case IPV4_FLOW: 403 case IPV6_FLOW: 404 if (!(cmd->data & RXH_IP_SRC) || 405 !(cmd->data & RXH_IP_DST) || 406 (cmd->data & RXH_L4_B_0_1) || 407 (cmd->data & RXH_L4_B_2_3)) 408 return -EINVAL; 409 reg_val = SXGBE_CORE_RSS_CTL_IP2TE; 410 break; 411 default: 412 return -EINVAL; 413 } 414 415 /* Read SXGBE RSS control register and update */ 416 reg_val |= readl(priv->ioaddr + SXGBE_CORE_RSS_CTL_REG); 417 writel(reg_val, priv->ioaddr + SXGBE_CORE_RSS_CTL_REG); 418 readl(priv->ioaddr + SXGBE_CORE_RSS_CTL_REG); 419 420 return 0; 421 } 422 423 static int sxgbe_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd) 424 { 425 struct sxgbe_priv_data *priv = netdev_priv(dev); 426 int ret = -EOPNOTSUPP; 427 428 switch (cmd->cmd) { 429 case ETHTOOL_SRXFH: 430 ret = sxgbe_set_rss_hash_opt(priv, cmd); 431 break; 432 default: 433 break; 434 } 435 436 return ret; 437 } 438 439 static void sxgbe_get_regs(struct net_device *dev, 440 struct ethtool_regs *regs, void *space) 441 { 442 struct sxgbe_priv_data *priv = netdev_priv(dev); 443 u32 *reg_space = (u32 *)space; 444 int reg_offset; 445 int reg_ix = 0; 446 void __iomem *ioaddr = priv->ioaddr; 447 448 memset(reg_space, 0x0, REG_SPACE_SIZE); 449 450 /* MAC registers */ 451 for (reg_offset = START_MAC_REG_OFFSET; 452 reg_offset <= MAX_MAC_REG_OFFSET; reg_offset += 4) { 453 reg_space[reg_ix] = readl(ioaddr + reg_offset); 454 reg_ix++; 455 } 456 457 /* MTL registers */ 458 for (reg_offset = START_MTL_REG_OFFSET; 459 reg_offset <= MAX_MTL_REG_OFFSET; reg_offset += 4) { 460 reg_space[reg_ix] = readl(ioaddr + reg_offset); 461 reg_ix++; 462 } 463 464 /* DMA registers */ 465 for (reg_offset = START_DMA_REG_OFFSET; 466 reg_offset <= MAX_DMA_REG_OFFSET; reg_offset += 4) { 467 reg_space[reg_ix] = readl(ioaddr + reg_offset); 468 reg_ix++; 469 } 470 471 BUG_ON(reg_ix * 4 > REG_SPACE_SIZE); 472 } 473 474 static int sxgbe_get_regs_len(struct net_device *dev) 475 { 476 return REG_SPACE_SIZE; 477 } 478 479 static const struct ethtool_ops sxgbe_ethtool_ops = { 480 .get_drvinfo = sxgbe_getdrvinfo, 481 .get_msglevel = sxgbe_getmsglevel, 482 .set_msglevel = sxgbe_setmsglevel, 483 .get_link = ethtool_op_get_link, 484 .get_strings = sxgbe_get_strings, 485 .get_ethtool_stats = sxgbe_get_ethtool_stats, 486 .get_sset_count = sxgbe_get_sset_count, 487 .get_channels = sxgbe_get_channels, 488 .get_coalesce = sxgbe_get_coalesce, 489 .set_coalesce = sxgbe_set_coalesce, 490 .get_rxnfc = sxgbe_get_rxnfc, 491 .set_rxnfc = sxgbe_set_rxnfc, 492 .get_regs = sxgbe_get_regs, 493 .get_regs_len = sxgbe_get_regs_len, 494 .get_eee = sxgbe_get_eee, 495 .set_eee = sxgbe_set_eee, 496 .get_link_ksettings = phy_ethtool_get_link_ksettings, 497 .set_link_ksettings = phy_ethtool_set_link_ksettings, 498 }; 499 500 void sxgbe_set_ethtool_ops(struct net_device *netdev) 501 { 502 netdev->ethtool_ops = &sxgbe_ethtool_ops; 503 } 504