1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright IBM Corp. 2018 4 */ 5 6 #define KMSG_COMPONENT "qeth" 7 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 8 9 #include <linux/ethtool.h> 10 #include "qeth_core.h" 11 12 13 #define QETH_TXQ_STAT(_name, _stat) { \ 14 .name = _name, \ 15 .offset = offsetof(struct qeth_out_q_stats, _stat) \ 16 } 17 18 #define QETH_CARD_STAT(_name, _stat) { \ 19 .name = _name, \ 20 .offset = offsetof(struct qeth_card_stats, _stat) \ 21 } 22 23 struct qeth_stats { 24 char name[ETH_GSTRING_LEN]; 25 unsigned int offset; 26 }; 27 28 static const struct qeth_stats txq_stats[] = { 29 QETH_TXQ_STAT("IO buffers", bufs), 30 QETH_TXQ_STAT("IO buffer elements", buf_elements), 31 QETH_TXQ_STAT("packed IO buffers", bufs_pack), 32 QETH_TXQ_STAT("skbs", tx_packets), 33 QETH_TXQ_STAT("packed skbs", skbs_pack), 34 QETH_TXQ_STAT("SG skbs", skbs_sg), 35 QETH_TXQ_STAT("HW csum skbs", skbs_csum), 36 QETH_TXQ_STAT("TSO skbs", skbs_tso), 37 QETH_TXQ_STAT("linearized skbs", skbs_linearized), 38 QETH_TXQ_STAT("linearized+error skbs", skbs_linearized_fail), 39 QETH_TXQ_STAT("TSO bytes", tso_bytes), 40 QETH_TXQ_STAT("Packing mode switches", packing_mode_switch), 41 QETH_TXQ_STAT("Queue stopped", stopped), 42 QETH_TXQ_STAT("Doorbell", doorbell), 43 QETH_TXQ_STAT("IRQ for frames", coal_frames), 44 QETH_TXQ_STAT("Completion IRQ", completion_irq), 45 QETH_TXQ_STAT("Completion yield", completion_yield), 46 QETH_TXQ_STAT("Completion timer", completion_timer), 47 }; 48 49 static const struct qeth_stats card_stats[] = { 50 QETH_CARD_STAT("rx0 IO buffers", rx_bufs), 51 QETH_CARD_STAT("rx0 HW csum skbs", rx_skb_csum), 52 QETH_CARD_STAT("rx0 SG skbs", rx_sg_skbs), 53 QETH_CARD_STAT("rx0 SG page frags", rx_sg_frags), 54 QETH_CARD_STAT("rx0 SG page allocs", rx_sg_alloc_page), 55 QETH_CARD_STAT("rx0 dropped, no memory", rx_dropped_nomem), 56 QETH_CARD_STAT("rx0 dropped, bad format", rx_dropped_notsupp), 57 QETH_CARD_STAT("rx0 dropped, runt", rx_dropped_runt), 58 }; 59 60 #define TXQ_STATS_LEN ARRAY_SIZE(txq_stats) 61 #define CARD_STATS_LEN ARRAY_SIZE(card_stats) 62 63 static void qeth_add_stat_data(u64 **dst, void *src, 64 const struct qeth_stats stats[], 65 unsigned int size) 66 { 67 unsigned int i; 68 char *stat; 69 70 for (i = 0; i < size; i++) { 71 stat = (char *)src + stats[i].offset; 72 **dst = *(u64 *)stat; 73 (*dst)++; 74 } 75 } 76 77 static void qeth_add_stat_strings(u8 **data, const char *prefix, 78 const struct qeth_stats stats[], 79 unsigned int size) 80 { 81 unsigned int i; 82 83 for (i = 0; i < size; i++) 84 ethtool_sprintf(data, "%s%s", prefix, stats[i].name); 85 } 86 87 static int qeth_get_sset_count(struct net_device *dev, int stringset) 88 { 89 struct qeth_card *card = dev->ml_priv; 90 91 switch (stringset) { 92 case ETH_SS_STATS: 93 return CARD_STATS_LEN + 94 card->qdio.no_out_queues * TXQ_STATS_LEN; 95 default: 96 return -EINVAL; 97 } 98 } 99 100 static void qeth_get_ethtool_stats(struct net_device *dev, 101 struct ethtool_stats *stats, u64 *data) 102 { 103 struct qeth_card *card = dev->ml_priv; 104 unsigned int i; 105 106 qeth_add_stat_data(&data, &card->stats, card_stats, CARD_STATS_LEN); 107 for (i = 0; i < card->qdio.no_out_queues; i++) 108 qeth_add_stat_data(&data, &card->qdio.out_qs[i]->stats, 109 txq_stats, TXQ_STATS_LEN); 110 } 111 112 static void __qeth_set_coalesce(struct net_device *dev, 113 struct qeth_qdio_out_q *queue, 114 struct ethtool_coalesce *coal) 115 { 116 WRITE_ONCE(queue->coalesce_usecs, coal->tx_coalesce_usecs); 117 WRITE_ONCE(queue->max_coalesced_frames, coal->tx_max_coalesced_frames); 118 119 if (coal->tx_coalesce_usecs && 120 netif_running(dev) && 121 !qeth_out_queue_is_empty(queue)) 122 qeth_tx_arm_timer(queue, coal->tx_coalesce_usecs); 123 } 124 125 static int qeth_set_coalesce(struct net_device *dev, 126 struct ethtool_coalesce *coal, 127 struct kernel_ethtool_coalesce *kernel_coal, 128 struct netlink_ext_ack *extack) 129 { 130 struct qeth_card *card = dev->ml_priv; 131 struct qeth_qdio_out_q *queue; 132 unsigned int i; 133 134 if (!IS_IQD(card)) 135 return -EOPNOTSUPP; 136 137 if (!coal->tx_coalesce_usecs && !coal->tx_max_coalesced_frames) 138 return -EINVAL; 139 140 qeth_for_each_output_queue(card, queue, i) 141 __qeth_set_coalesce(dev, queue, coal); 142 143 return 0; 144 } 145 146 static void qeth_get_ringparam(struct net_device *dev, 147 struct ethtool_ringparam *param) 148 { 149 struct qeth_card *card = dev->ml_priv; 150 151 param->rx_max_pending = QDIO_MAX_BUFFERS_PER_Q; 152 param->rx_mini_max_pending = 0; 153 param->rx_jumbo_max_pending = 0; 154 param->tx_max_pending = QDIO_MAX_BUFFERS_PER_Q; 155 156 param->rx_pending = card->qdio.in_buf_pool.buf_count; 157 param->rx_mini_pending = 0; 158 param->rx_jumbo_pending = 0; 159 param->tx_pending = QDIO_MAX_BUFFERS_PER_Q; 160 } 161 162 static void qeth_get_strings(struct net_device *dev, u32 stringset, u8 *data) 163 { 164 struct qeth_card *card = dev->ml_priv; 165 char prefix[ETH_GSTRING_LEN] = ""; 166 unsigned int i; 167 168 switch (stringset) { 169 case ETH_SS_STATS: 170 qeth_add_stat_strings(&data, prefix, card_stats, 171 CARD_STATS_LEN); 172 for (i = 0; i < card->qdio.no_out_queues; i++) { 173 snprintf(prefix, ETH_GSTRING_LEN, "tx%u ", i); 174 qeth_add_stat_strings(&data, prefix, txq_stats, 175 TXQ_STATS_LEN); 176 } 177 break; 178 default: 179 WARN_ON(1); 180 break; 181 } 182 } 183 184 static void qeth_get_drvinfo(struct net_device *dev, 185 struct ethtool_drvinfo *info) 186 { 187 struct qeth_card *card = dev->ml_priv; 188 189 strlcpy(info->driver, IS_LAYER2(card) ? "qeth_l2" : "qeth_l3", 190 sizeof(info->driver)); 191 strlcpy(info->fw_version, card->info.mcl_level, 192 sizeof(info->fw_version)); 193 snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s", 194 CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card)); 195 } 196 197 static void qeth_get_channels(struct net_device *dev, 198 struct ethtool_channels *channels) 199 { 200 struct qeth_card *card = dev->ml_priv; 201 202 channels->max_rx = dev->num_rx_queues; 203 channels->max_tx = card->qdio.no_out_queues; 204 channels->max_other = 0; 205 channels->max_combined = 0; 206 channels->rx_count = dev->real_num_rx_queues; 207 channels->tx_count = dev->real_num_tx_queues; 208 channels->other_count = 0; 209 channels->combined_count = 0; 210 } 211 212 static int qeth_set_channels(struct net_device *dev, 213 struct ethtool_channels *channels) 214 { 215 struct qeth_priv *priv = netdev_priv(dev); 216 struct qeth_card *card = dev->ml_priv; 217 int rc; 218 219 if (channels->rx_count == 0 || channels->tx_count == 0) 220 return -EINVAL; 221 if (channels->tx_count > card->qdio.no_out_queues) 222 return -EINVAL; 223 224 /* Prio-queueing needs all TX queues: */ 225 if (qeth_uses_tx_prio_queueing(card)) 226 return -EPERM; 227 228 if (IS_IQD(card)) { 229 if (channels->tx_count < QETH_IQD_MIN_TXQ) 230 return -EINVAL; 231 232 /* Reject downgrade while running. It could push displaced 233 * ucast flows onto txq0, which is reserved for mcast. 234 */ 235 if (netif_running(dev) && 236 channels->tx_count < dev->real_num_tx_queues) 237 return -EPERM; 238 } 239 240 rc = qeth_set_real_num_tx_queues(card, channels->tx_count); 241 if (!rc) 242 priv->tx_wanted_queues = channels->tx_count; 243 244 return rc; 245 } 246 247 static int qeth_get_ts_info(struct net_device *dev, 248 struct ethtool_ts_info *info) 249 { 250 struct qeth_card *card = dev->ml_priv; 251 252 if (!IS_IQD(card)) 253 return -EOPNOTSUPP; 254 255 return ethtool_op_get_ts_info(dev, info); 256 } 257 258 static int qeth_get_tunable(struct net_device *dev, 259 const struct ethtool_tunable *tuna, void *data) 260 { 261 struct qeth_priv *priv = netdev_priv(dev); 262 263 switch (tuna->id) { 264 case ETHTOOL_RX_COPYBREAK: 265 *(u32 *)data = priv->rx_copybreak; 266 return 0; 267 default: 268 return -EOPNOTSUPP; 269 } 270 } 271 272 static int qeth_set_tunable(struct net_device *dev, 273 const struct ethtool_tunable *tuna, 274 const void *data) 275 { 276 struct qeth_priv *priv = netdev_priv(dev); 277 278 switch (tuna->id) { 279 case ETHTOOL_RX_COPYBREAK: 280 WRITE_ONCE(priv->rx_copybreak, *(u32 *)data); 281 return 0; 282 default: 283 return -EOPNOTSUPP; 284 } 285 } 286 287 static int qeth_get_per_queue_coalesce(struct net_device *dev, u32 __queue, 288 struct ethtool_coalesce *coal) 289 { 290 struct qeth_card *card = dev->ml_priv; 291 struct qeth_qdio_out_q *queue; 292 293 if (!IS_IQD(card)) 294 return -EOPNOTSUPP; 295 296 if (__queue >= card->qdio.no_out_queues) 297 return -EINVAL; 298 299 queue = card->qdio.out_qs[__queue]; 300 301 coal->tx_coalesce_usecs = queue->coalesce_usecs; 302 coal->tx_max_coalesced_frames = queue->max_coalesced_frames; 303 return 0; 304 } 305 306 static int qeth_set_per_queue_coalesce(struct net_device *dev, u32 queue, 307 struct ethtool_coalesce *coal) 308 { 309 struct qeth_card *card = dev->ml_priv; 310 311 if (!IS_IQD(card)) 312 return -EOPNOTSUPP; 313 314 if (queue >= card->qdio.no_out_queues) 315 return -EINVAL; 316 317 if (!coal->tx_coalesce_usecs && !coal->tx_max_coalesced_frames) 318 return -EINVAL; 319 320 __qeth_set_coalesce(dev, card->qdio.out_qs[queue], coal); 321 return 0; 322 } 323 324 /* Helper function to fill 'advertising' and 'supported' which are the same. */ 325 /* Autoneg and full-duplex are supported and advertised unconditionally. */ 326 /* Always advertise and support all speeds up to specified, and only one */ 327 /* specified port type. */ 328 static void qeth_set_ethtool_link_modes(struct ethtool_link_ksettings *cmd, 329 enum qeth_link_mode link_mode) 330 { 331 ethtool_link_ksettings_zero_link_mode(cmd, supported); 332 ethtool_link_ksettings_zero_link_mode(cmd, advertising); 333 ethtool_link_ksettings_zero_link_mode(cmd, lp_advertising); 334 335 ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg); 336 ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg); 337 338 switch (cmd->base.port) { 339 case PORT_TP: 340 ethtool_link_ksettings_add_link_mode(cmd, supported, TP); 341 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP); 342 343 switch (cmd->base.speed) { 344 case SPEED_10000: 345 ethtool_link_ksettings_add_link_mode(cmd, supported, 346 10000baseT_Full); 347 ethtool_link_ksettings_add_link_mode(cmd, advertising, 348 10000baseT_Full); 349 fallthrough; 350 case SPEED_1000: 351 ethtool_link_ksettings_add_link_mode(cmd, supported, 352 1000baseT_Full); 353 ethtool_link_ksettings_add_link_mode(cmd, advertising, 354 1000baseT_Full); 355 ethtool_link_ksettings_add_link_mode(cmd, supported, 356 1000baseT_Half); 357 ethtool_link_ksettings_add_link_mode(cmd, advertising, 358 1000baseT_Half); 359 fallthrough; 360 case SPEED_100: 361 ethtool_link_ksettings_add_link_mode(cmd, supported, 362 100baseT_Full); 363 ethtool_link_ksettings_add_link_mode(cmd, advertising, 364 100baseT_Full); 365 ethtool_link_ksettings_add_link_mode(cmd, supported, 366 100baseT_Half); 367 ethtool_link_ksettings_add_link_mode(cmd, advertising, 368 100baseT_Half); 369 fallthrough; 370 case SPEED_10: 371 ethtool_link_ksettings_add_link_mode(cmd, supported, 372 10baseT_Full); 373 ethtool_link_ksettings_add_link_mode(cmd, advertising, 374 10baseT_Full); 375 ethtool_link_ksettings_add_link_mode(cmd, supported, 376 10baseT_Half); 377 ethtool_link_ksettings_add_link_mode(cmd, advertising, 378 10baseT_Half); 379 break; 380 default: 381 break; 382 } 383 384 break; 385 case PORT_FIBRE: 386 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE); 387 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE); 388 389 switch (cmd->base.speed) { 390 case SPEED_25000: 391 ethtool_link_ksettings_add_link_mode(cmd, supported, 392 25000baseSR_Full); 393 ethtool_link_ksettings_add_link_mode(cmd, advertising, 394 25000baseSR_Full); 395 break; 396 case SPEED_10000: 397 if (link_mode == QETH_LINK_MODE_FIBRE_LONG) { 398 ethtool_link_ksettings_add_link_mode(cmd, supported, 399 10000baseLR_Full); 400 ethtool_link_ksettings_add_link_mode(cmd, advertising, 401 10000baseLR_Full); 402 } else if (link_mode == QETH_LINK_MODE_FIBRE_SHORT) { 403 ethtool_link_ksettings_add_link_mode(cmd, supported, 404 10000baseSR_Full); 405 ethtool_link_ksettings_add_link_mode(cmd, advertising, 406 10000baseSR_Full); 407 } 408 break; 409 case SPEED_1000: 410 ethtool_link_ksettings_add_link_mode(cmd, supported, 411 1000baseX_Full); 412 ethtool_link_ksettings_add_link_mode(cmd, advertising, 413 1000baseX_Full); 414 break; 415 default: 416 break; 417 } 418 419 break; 420 default: 421 break; 422 } 423 } 424 425 static int qeth_get_link_ksettings(struct net_device *netdev, 426 struct ethtool_link_ksettings *cmd) 427 { 428 struct qeth_card *card = netdev->ml_priv; 429 struct qeth_link_info link_info; 430 431 cmd->base.speed = card->info.link_info.speed; 432 cmd->base.duplex = card->info.link_info.duplex; 433 cmd->base.port = card->info.link_info.port; 434 cmd->base.autoneg = AUTONEG_ENABLE; 435 cmd->base.phy_address = 0; 436 cmd->base.mdio_support = 0; 437 cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID; 438 cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID; 439 440 /* Check if we can obtain more accurate information. */ 441 if (!qeth_query_card_info(card, &link_info)) { 442 if (link_info.speed != SPEED_UNKNOWN) 443 cmd->base.speed = link_info.speed; 444 if (link_info.duplex != DUPLEX_UNKNOWN) 445 cmd->base.duplex = link_info.duplex; 446 if (link_info.port != PORT_OTHER) 447 cmd->base.port = link_info.port; 448 } 449 450 qeth_set_ethtool_link_modes(cmd, card->info.link_info.link_mode); 451 452 return 0; 453 } 454 455 const struct ethtool_ops qeth_ethtool_ops = { 456 .supported_coalesce_params = ETHTOOL_COALESCE_TX_USECS | 457 ETHTOOL_COALESCE_TX_MAX_FRAMES, 458 .get_link = ethtool_op_get_link, 459 .set_coalesce = qeth_set_coalesce, 460 .get_ringparam = qeth_get_ringparam, 461 .get_strings = qeth_get_strings, 462 .get_ethtool_stats = qeth_get_ethtool_stats, 463 .get_sset_count = qeth_get_sset_count, 464 .get_drvinfo = qeth_get_drvinfo, 465 .get_channels = qeth_get_channels, 466 .set_channels = qeth_set_channels, 467 .get_ts_info = qeth_get_ts_info, 468 .get_tunable = qeth_get_tunable, 469 .set_tunable = qeth_set_tunable, 470 .get_per_queue_coalesce = qeth_get_per_queue_coalesce, 471 .set_per_queue_coalesce = qeth_set_per_queue_coalesce, 472 .get_link_ksettings = qeth_get_link_ksettings, 473 }; 474