drivers/net/ethernet/samsung/sxgbe/sxgbe_ethtool.c

   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 }