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