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 struct kernel_ethtool_ringparam *kernel_param, 149 struct netlink_ext_ack *extack) 150 { 151 struct qeth_card *card = dev->ml_priv; 152 153 param->rx_max_pending = QDIO_MAX_BUFFERS_PER_Q; 154 param->rx_mini_max_pending = 0; 155 param->rx_jumbo_max_pending = 0; 156 param->tx_max_pending = QDIO_MAX_BUFFERS_PER_Q; 157 158 param->rx_pending = card->qdio.in_buf_pool.buf_count; 159 param->rx_mini_pending = 0; 160 param->rx_jumbo_pending = 0; 161 param->tx_pending = QDIO_MAX_BUFFERS_PER_Q; 162 } 163 164 static void qeth_get_strings(struct net_device *dev, u32 stringset, u8 *data) 165 { 166 struct qeth_card *card = dev->ml_priv; 167 char prefix[ETH_GSTRING_LEN] = ""; 168 unsigned int i; 169 170 switch (stringset) { 171 case ETH_SS_STATS: 172 qeth_add_stat_strings(&data, prefix, card_stats, 173 CARD_STATS_LEN); 174 for (i = 0; i < card->qdio.no_out_queues; i++) { 175 snprintf(prefix, ETH_GSTRING_LEN, "tx%u ", i); 176 qeth_add_stat_strings(&data, prefix, txq_stats, 177 TXQ_STATS_LEN); 178 } 179 break; 180 default: 181 WARN_ON(1); 182 break; 183 } 184 } 185 186 static void qeth_get_drvinfo(struct net_device *dev, 187 struct ethtool_drvinfo *info) 188 { 189 struct qeth_card *card = dev->ml_priv; 190 191 strlcpy(info->driver, IS_LAYER2(card) ? "qeth_l2" : "qeth_l3", 192 sizeof(info->driver)); 193 strlcpy(info->fw_version, card->info.mcl_level, 194 sizeof(info->fw_version)); 195 snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s", 196 CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card)); 197 } 198 199 static void qeth_get_channels(struct net_device *dev, 200 struct ethtool_channels *channels) 201 { 202 struct qeth_card *card = dev->ml_priv; 203 204 channels->max_rx = dev->num_rx_queues; 205 channels->max_tx = card->qdio.no_out_queues; 206 channels->max_other = 0; 207 channels->max_combined = 0; 208 channels->rx_count = dev->real_num_rx_queues; 209 channels->tx_count = dev->real_num_tx_queues; 210 channels->other_count = 0; 211 channels->combined_count = 0; 212 } 213 214 static int qeth_set_channels(struct net_device *dev, 215 struct ethtool_channels *channels) 216 { 217 struct qeth_priv *priv = netdev_priv(dev); 218 struct qeth_card *card = dev->ml_priv; 219 int rc; 220 221 if (channels->rx_count == 0 || channels->tx_count == 0) 222 return -EINVAL; 223 if (channels->tx_count > card->qdio.no_out_queues) 224 return -EINVAL; 225 226 /* Prio-queueing needs all TX queues: */ 227 if (qeth_uses_tx_prio_queueing(card)) 228 return -EPERM; 229 230 if (IS_IQD(card)) { 231 if (channels->tx_count < QETH_IQD_MIN_TXQ) 232 return -EINVAL; 233 234 /* Reject downgrade while running. It could push displaced 235 * ucast flows onto txq0, which is reserved for mcast. 236 */ 237 if (netif_running(dev) && 238 channels->tx_count < dev->real_num_tx_queues) 239 return -EPERM; 240 } 241 242 rc = qeth_set_real_num_tx_queues(card, channels->tx_count); 243 if (!rc) 244 priv->tx_wanted_queues = channels->tx_count; 245 246 return rc; 247 } 248 249 static int qeth_get_ts_info(struct net_device *dev, 250 struct ethtool_ts_info *info) 251 { 252 struct qeth_card *card = dev->ml_priv; 253 254 if (!IS_IQD(card)) 255 return -EOPNOTSUPP; 256 257 return ethtool_op_get_ts_info(dev, info); 258 } 259 260 static int qeth_get_tunable(struct net_device *dev, 261 const struct ethtool_tunable *tuna, void *data) 262 { 263 struct qeth_priv *priv = netdev_priv(dev); 264 265 switch (tuna->id) { 266 case ETHTOOL_RX_COPYBREAK: 267 *(u32 *)data = priv->rx_copybreak; 268 return 0; 269 default: 270 return -EOPNOTSUPP; 271 } 272 } 273 274 static int qeth_set_tunable(struct net_device *dev, 275 const struct ethtool_tunable *tuna, 276 const void *data) 277 { 278 struct qeth_priv *priv = netdev_priv(dev); 279 280 switch (tuna->id) { 281 case ETHTOOL_RX_COPYBREAK: 282 WRITE_ONCE(priv->rx_copybreak, *(u32 *)data); 283 return 0; 284 default: 285 return -EOPNOTSUPP; 286 } 287 } 288 289 static int qeth_get_per_queue_coalesce(struct net_device *dev, u32 __queue, 290 struct ethtool_coalesce *coal) 291 { 292 struct qeth_card *card = dev->ml_priv; 293 struct qeth_qdio_out_q *queue; 294 295 if (!IS_IQD(card)) 296 return -EOPNOTSUPP; 297 298 if (__queue >= card->qdio.no_out_queues) 299 return -EINVAL; 300 301 queue = card->qdio.out_qs[__queue]; 302 303 coal->tx_coalesce_usecs = queue->coalesce_usecs; 304 coal->tx_max_coalesced_frames = queue->max_coalesced_frames; 305 return 0; 306 } 307 308 static int qeth_set_per_queue_coalesce(struct net_device *dev, u32 queue, 309 struct ethtool_coalesce *coal) 310 { 311 struct qeth_card *card = dev->ml_priv; 312 313 if (!IS_IQD(card)) 314 return -EOPNOTSUPP; 315 316 if (queue >= card->qdio.no_out_queues) 317 return -EINVAL; 318 319 if (!coal->tx_coalesce_usecs && !coal->tx_max_coalesced_frames) 320 return -EINVAL; 321 322 __qeth_set_coalesce(dev, card->qdio.out_qs[queue], coal); 323 return 0; 324 } 325 326 /* Helper function to fill 'advertising' and 'supported' which are the same. */ 327 /* Autoneg and full-duplex are supported and advertised unconditionally. */ 328 /* Always advertise and support all speeds up to specified, and only one */ 329 /* specified port type. */ 330 static void qeth_set_ethtool_link_modes(struct ethtool_link_ksettings *cmd, 331 enum qeth_link_mode link_mode) 332 { 333 ethtool_link_ksettings_zero_link_mode(cmd, supported); 334 ethtool_link_ksettings_zero_link_mode(cmd, advertising); 335 ethtool_link_ksettings_zero_link_mode(cmd, lp_advertising); 336 337 ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg); 338 ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg); 339 340 switch (cmd->base.port) { 341 case PORT_TP: 342 ethtool_link_ksettings_add_link_mode(cmd, supported, TP); 343 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP); 344 345 switch (cmd->base.speed) { 346 case SPEED_10000: 347 ethtool_link_ksettings_add_link_mode(cmd, supported, 348 10000baseT_Full); 349 ethtool_link_ksettings_add_link_mode(cmd, advertising, 350 10000baseT_Full); 351 fallthrough; 352 case SPEED_1000: 353 ethtool_link_ksettings_add_link_mode(cmd, supported, 354 1000baseT_Full); 355 ethtool_link_ksettings_add_link_mode(cmd, advertising, 356 1000baseT_Full); 357 ethtool_link_ksettings_add_link_mode(cmd, supported, 358 1000baseT_Half); 359 ethtool_link_ksettings_add_link_mode(cmd, advertising, 360 1000baseT_Half); 361 fallthrough; 362 case SPEED_100: 363 ethtool_link_ksettings_add_link_mode(cmd, supported, 364 100baseT_Full); 365 ethtool_link_ksettings_add_link_mode(cmd, advertising, 366 100baseT_Full); 367 ethtool_link_ksettings_add_link_mode(cmd, supported, 368 100baseT_Half); 369 ethtool_link_ksettings_add_link_mode(cmd, advertising, 370 100baseT_Half); 371 fallthrough; 372 case SPEED_10: 373 ethtool_link_ksettings_add_link_mode(cmd, supported, 374 10baseT_Full); 375 ethtool_link_ksettings_add_link_mode(cmd, advertising, 376 10baseT_Full); 377 ethtool_link_ksettings_add_link_mode(cmd, supported, 378 10baseT_Half); 379 ethtool_link_ksettings_add_link_mode(cmd, advertising, 380 10baseT_Half); 381 break; 382 default: 383 break; 384 } 385 386 break; 387 case PORT_FIBRE: 388 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE); 389 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE); 390 391 switch (cmd->base.speed) { 392 case SPEED_25000: 393 ethtool_link_ksettings_add_link_mode(cmd, supported, 394 25000baseSR_Full); 395 ethtool_link_ksettings_add_link_mode(cmd, advertising, 396 25000baseSR_Full); 397 break; 398 case SPEED_10000: 399 if (link_mode == QETH_LINK_MODE_FIBRE_LONG) { 400 ethtool_link_ksettings_add_link_mode(cmd, supported, 401 10000baseLR_Full); 402 ethtool_link_ksettings_add_link_mode(cmd, advertising, 403 10000baseLR_Full); 404 } else if (link_mode == QETH_LINK_MODE_FIBRE_SHORT) { 405 ethtool_link_ksettings_add_link_mode(cmd, supported, 406 10000baseSR_Full); 407 ethtool_link_ksettings_add_link_mode(cmd, advertising, 408 10000baseSR_Full); 409 } 410 break; 411 case SPEED_1000: 412 ethtool_link_ksettings_add_link_mode(cmd, supported, 413 1000baseX_Full); 414 ethtool_link_ksettings_add_link_mode(cmd, advertising, 415 1000baseX_Full); 416 break; 417 default: 418 break; 419 } 420 421 break; 422 default: 423 break; 424 } 425 } 426 427 static int qeth_get_link_ksettings(struct net_device *netdev, 428 struct ethtool_link_ksettings *cmd) 429 { 430 struct qeth_card *card = netdev->ml_priv; 431 432 QETH_CARD_TEXT(card, 4, "ethtglks"); 433 cmd->base.speed = card->info.link_info.speed; 434 cmd->base.duplex = card->info.link_info.duplex; 435 cmd->base.port = card->info.link_info.port; 436 cmd->base.autoneg = AUTONEG_ENABLE; 437 cmd->base.phy_address = 0; 438 cmd->base.mdio_support = 0; 439 cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID; 440 cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID; 441 442 qeth_set_ethtool_link_modes(cmd, card->info.link_info.link_mode); 443 444 return 0; 445 } 446 447 const struct ethtool_ops qeth_ethtool_ops = { 448 .supported_coalesce_params = ETHTOOL_COALESCE_TX_USECS | 449 ETHTOOL_COALESCE_TX_MAX_FRAMES, 450 .get_link = ethtool_op_get_link, 451 .set_coalesce = qeth_set_coalesce, 452 .get_ringparam = qeth_get_ringparam, 453 .get_strings = qeth_get_strings, 454 .get_ethtool_stats = qeth_get_ethtool_stats, 455 .get_sset_count = qeth_get_sset_count, 456 .get_drvinfo = qeth_get_drvinfo, 457 .get_channels = qeth_get_channels, 458 .set_channels = qeth_set_channels, 459 .get_ts_info = qeth_get_ts_info, 460 .get_tunable = qeth_get_tunable, 461 .set_tunable = qeth_set_tunable, 462 .get_per_queue_coalesce = qeth_get_per_queue_coalesce, 463 .set_per_queue_coalesce = qeth_set_per_queue_coalesce, 464 .get_link_ksettings = qeth_get_link_ksettings, 465 }; 466