1 /* 2 * Copyright (C) 2015 Netronome Systems, Inc. 3 * 4 * This software is dual licensed under the GNU General License Version 2, 5 * June 1991 as shown in the file COPYING in the top-level directory of this 6 * source tree or the BSD 2-Clause License provided below. You have the 7 * option to license this software under the complete terms of either license. 8 * 9 * The BSD 2-Clause License: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * 1. Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * 2. Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 /* 35 * nfp_net_ethtool.c 36 * Netronome network device driver: ethtool support 37 * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> 38 * Jason McMullan <jason.mcmullan@netronome.com> 39 * Rolf Neugebauer <rolf.neugebauer@netronome.com> 40 * Brad Petrus <brad.petrus@netronome.com> 41 */ 42 43 #include <linux/version.h> 44 #include <linux/kernel.h> 45 #include <linux/netdevice.h> 46 #include <linux/etherdevice.h> 47 #include <linux/interrupt.h> 48 #include <linux/pci.h> 49 #include <linux/ethtool.h> 50 51 #include "nfp_net_ctrl.h" 52 #include "nfp_net.h" 53 54 /* Support for stats. Returns netdev, driver, and device stats */ 55 enum { NETDEV_ET_STATS, NFP_NET_DRV_ET_STATS, NFP_NET_DEV_ET_STATS }; 56 struct _nfp_net_et_stats { 57 char name[ETH_GSTRING_LEN]; 58 int type; 59 int sz; 60 int off; 61 }; 62 63 #define NN_ET_NETDEV_STAT(m) NETDEV_ET_STATS, \ 64 FIELD_SIZEOF(struct net_device_stats, m), \ 65 offsetof(struct net_device_stats, m) 66 /* For stats in the control BAR (other than Q stats) */ 67 #define NN_ET_DEV_STAT(m) NFP_NET_DEV_ET_STATS, \ 68 sizeof(u64), \ 69 (m) 70 static const struct _nfp_net_et_stats nfp_net_et_stats[] = { 71 /* netdev stats */ 72 {"rx_packets", NN_ET_NETDEV_STAT(rx_packets)}, 73 {"tx_packets", NN_ET_NETDEV_STAT(tx_packets)}, 74 {"rx_bytes", NN_ET_NETDEV_STAT(rx_bytes)}, 75 {"tx_bytes", NN_ET_NETDEV_STAT(tx_bytes)}, 76 {"rx_errors", NN_ET_NETDEV_STAT(rx_errors)}, 77 {"tx_errors", NN_ET_NETDEV_STAT(tx_errors)}, 78 {"rx_dropped", NN_ET_NETDEV_STAT(rx_dropped)}, 79 {"tx_dropped", NN_ET_NETDEV_STAT(tx_dropped)}, 80 {"multicast", NN_ET_NETDEV_STAT(multicast)}, 81 {"collisions", NN_ET_NETDEV_STAT(collisions)}, 82 {"rx_over_errors", NN_ET_NETDEV_STAT(rx_over_errors)}, 83 {"rx_crc_errors", NN_ET_NETDEV_STAT(rx_crc_errors)}, 84 {"rx_frame_errors", NN_ET_NETDEV_STAT(rx_frame_errors)}, 85 {"rx_fifo_errors", NN_ET_NETDEV_STAT(rx_fifo_errors)}, 86 {"rx_missed_errors", NN_ET_NETDEV_STAT(rx_missed_errors)}, 87 {"tx_aborted_errors", NN_ET_NETDEV_STAT(tx_aborted_errors)}, 88 {"tx_carrier_errors", NN_ET_NETDEV_STAT(tx_carrier_errors)}, 89 {"tx_fifo_errors", NN_ET_NETDEV_STAT(tx_fifo_errors)}, 90 /* Stats from the device */ 91 {"dev_rx_discards", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_DISCARDS)}, 92 {"dev_rx_errors", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_ERRORS)}, 93 {"dev_rx_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_OCTETS)}, 94 {"dev_rx_uc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_UC_OCTETS)}, 95 {"dev_rx_mc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_MC_OCTETS)}, 96 {"dev_rx_bc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_BC_OCTETS)}, 97 {"dev_rx_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_FRAMES)}, 98 {"dev_rx_mc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_MC_FRAMES)}, 99 {"dev_rx_bc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_BC_FRAMES)}, 100 101 {"dev_tx_discards", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_DISCARDS)}, 102 {"dev_tx_errors", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_ERRORS)}, 103 {"dev_tx_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_OCTETS)}, 104 {"dev_tx_uc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_UC_OCTETS)}, 105 {"dev_tx_mc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_MC_OCTETS)}, 106 {"dev_tx_bc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_BC_OCTETS)}, 107 {"dev_tx_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_FRAMES)}, 108 {"dev_tx_mc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_MC_FRAMES)}, 109 {"dev_tx_bc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_BC_FRAMES)}, 110 }; 111 112 #define NN_ET_GLOBAL_STATS_LEN ARRAY_SIZE(nfp_net_et_stats) 113 #define NN_ET_RVEC_STATS_LEN (nn->num_r_vecs * 3) 114 #define NN_ET_RVEC_GATHER_STATS 7 115 #define NN_ET_QUEUE_STATS_LEN ((nn->num_tx_rings + nn->num_rx_rings) * 2) 116 #define NN_ET_STATS_LEN (NN_ET_GLOBAL_STATS_LEN + NN_ET_RVEC_GATHER_STATS + \ 117 NN_ET_RVEC_STATS_LEN + NN_ET_QUEUE_STATS_LEN) 118 119 static void nfp_net_get_drvinfo(struct net_device *netdev, 120 struct ethtool_drvinfo *drvinfo) 121 { 122 struct nfp_net *nn = netdev_priv(netdev); 123 124 strlcpy(drvinfo->driver, nfp_net_driver_name, sizeof(drvinfo->driver)); 125 strlcpy(drvinfo->version, nfp_net_driver_version, 126 sizeof(drvinfo->version)); 127 128 snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version), 129 "%d.%d.%d.%d", 130 nn->fw_ver.resv, nn->fw_ver.class, 131 nn->fw_ver.major, nn->fw_ver.minor); 132 strlcpy(drvinfo->bus_info, pci_name(nn->pdev), 133 sizeof(drvinfo->bus_info)); 134 135 drvinfo->n_stats = NN_ET_STATS_LEN; 136 drvinfo->regdump_len = NFP_NET_CFG_BAR_SZ; 137 } 138 139 static void nfp_net_get_ringparam(struct net_device *netdev, 140 struct ethtool_ringparam *ring) 141 { 142 struct nfp_net *nn = netdev_priv(netdev); 143 144 ring->rx_max_pending = NFP_NET_MAX_RX_DESCS; 145 ring->tx_max_pending = NFP_NET_MAX_TX_DESCS; 146 ring->rx_pending = nn->rxd_cnt; 147 ring->tx_pending = nn->txd_cnt; 148 } 149 150 static int nfp_net_set_ringparam(struct net_device *netdev, 151 struct ethtool_ringparam *ring) 152 { 153 struct nfp_net *nn = netdev_priv(netdev); 154 u32 rxd_cnt, txd_cnt; 155 156 /* We don't have separate queues/rings for small/large frames. */ 157 if (ring->rx_mini_pending || ring->rx_jumbo_pending) 158 return -EINVAL; 159 160 /* Round up to supported values */ 161 rxd_cnt = roundup_pow_of_two(ring->rx_pending); 162 txd_cnt = roundup_pow_of_two(ring->tx_pending); 163 164 if (rxd_cnt < NFP_NET_MIN_RX_DESCS || rxd_cnt > NFP_NET_MAX_RX_DESCS || 165 txd_cnt < NFP_NET_MIN_TX_DESCS || txd_cnt > NFP_NET_MAX_TX_DESCS) 166 return -EINVAL; 167 168 if (nn->rxd_cnt == rxd_cnt && nn->txd_cnt == txd_cnt) 169 return 0; 170 171 nn_dbg(nn, "Change ring size: RxQ %u->%u, TxQ %u->%u\n", 172 nn->rxd_cnt, rxd_cnt, nn->txd_cnt, txd_cnt); 173 174 return nfp_net_set_ring_size(nn, rxd_cnt, txd_cnt); 175 } 176 177 static void nfp_net_get_strings(struct net_device *netdev, 178 u32 stringset, u8 *data) 179 { 180 struct nfp_net *nn = netdev_priv(netdev); 181 u8 *p = data; 182 int i; 183 184 switch (stringset) { 185 case ETH_SS_STATS: 186 for (i = 0; i < NN_ET_GLOBAL_STATS_LEN; i++) { 187 memcpy(p, nfp_net_et_stats[i].name, ETH_GSTRING_LEN); 188 p += ETH_GSTRING_LEN; 189 } 190 for (i = 0; i < nn->num_r_vecs; i++) { 191 sprintf(p, "rvec_%u_rx_pkts", i); 192 p += ETH_GSTRING_LEN; 193 sprintf(p, "rvec_%u_tx_pkts", i); 194 p += ETH_GSTRING_LEN; 195 sprintf(p, "rvec_%u_tx_busy", i); 196 p += ETH_GSTRING_LEN; 197 } 198 strncpy(p, "hw_rx_csum_ok", ETH_GSTRING_LEN); 199 p += ETH_GSTRING_LEN; 200 strncpy(p, "hw_rx_csum_inner_ok", ETH_GSTRING_LEN); 201 p += ETH_GSTRING_LEN; 202 strncpy(p, "hw_rx_csum_err", ETH_GSTRING_LEN); 203 p += ETH_GSTRING_LEN; 204 strncpy(p, "hw_tx_csum", ETH_GSTRING_LEN); 205 p += ETH_GSTRING_LEN; 206 strncpy(p, "hw_tx_inner_csum", ETH_GSTRING_LEN); 207 p += ETH_GSTRING_LEN; 208 strncpy(p, "tx_gather", ETH_GSTRING_LEN); 209 p += ETH_GSTRING_LEN; 210 strncpy(p, "tx_lso", ETH_GSTRING_LEN); 211 p += ETH_GSTRING_LEN; 212 for (i = 0; i < nn->num_tx_rings; i++) { 213 sprintf(p, "txq_%u_pkts", i); 214 p += ETH_GSTRING_LEN; 215 sprintf(p, "txq_%u_bytes", i); 216 p += ETH_GSTRING_LEN; 217 } 218 for (i = 0; i < nn->num_rx_rings; i++) { 219 sprintf(p, "rxq_%u_pkts", i); 220 p += ETH_GSTRING_LEN; 221 sprintf(p, "rxq_%u_bytes", i); 222 p += ETH_GSTRING_LEN; 223 } 224 break; 225 } 226 } 227 228 static void nfp_net_get_stats(struct net_device *netdev, 229 struct ethtool_stats *stats, u64 *data) 230 { 231 u64 gathered_stats[NN_ET_RVEC_GATHER_STATS] = {}; 232 struct nfp_net *nn = netdev_priv(netdev); 233 struct rtnl_link_stats64 *netdev_stats; 234 struct rtnl_link_stats64 temp = {}; 235 u64 tmp[NN_ET_RVEC_GATHER_STATS]; 236 u8 __iomem *io_p; 237 int i, j, k; 238 u8 *p; 239 240 netdev_stats = dev_get_stats(netdev, &temp); 241 242 for (i = 0; i < NN_ET_GLOBAL_STATS_LEN; i++) { 243 switch (nfp_net_et_stats[i].type) { 244 case NETDEV_ET_STATS: 245 p = (char *)netdev_stats + nfp_net_et_stats[i].off; 246 data[i] = nfp_net_et_stats[i].sz == sizeof(u64) ? 247 *(u64 *)p : *(u32 *)p; 248 break; 249 250 case NFP_NET_DEV_ET_STATS: 251 io_p = nn->ctrl_bar + nfp_net_et_stats[i].off; 252 data[i] = readq(io_p); 253 break; 254 } 255 } 256 for (j = 0; j < nn->num_r_vecs; j++) { 257 unsigned int start; 258 259 do { 260 start = u64_stats_fetch_begin(&nn->r_vecs[j].rx_sync); 261 data[i++] = nn->r_vecs[j].rx_pkts; 262 tmp[0] = nn->r_vecs[j].hw_csum_rx_ok; 263 tmp[1] = nn->r_vecs[j].hw_csum_rx_inner_ok; 264 tmp[2] = nn->r_vecs[j].hw_csum_rx_error; 265 } while (u64_stats_fetch_retry(&nn->r_vecs[j].rx_sync, start)); 266 267 do { 268 start = u64_stats_fetch_begin(&nn->r_vecs[j].tx_sync); 269 data[i++] = nn->r_vecs[j].tx_pkts; 270 data[i++] = nn->r_vecs[j].tx_busy; 271 tmp[3] = nn->r_vecs[j].hw_csum_tx; 272 tmp[4] = nn->r_vecs[j].hw_csum_tx_inner; 273 tmp[5] = nn->r_vecs[j].tx_gather; 274 tmp[6] = nn->r_vecs[j].tx_lso; 275 } while (u64_stats_fetch_retry(&nn->r_vecs[j].tx_sync, start)); 276 277 for (k = 0; k < NN_ET_RVEC_GATHER_STATS; k++) 278 gathered_stats[k] += tmp[k]; 279 } 280 for (j = 0; j < NN_ET_RVEC_GATHER_STATS; j++) 281 data[i++] = gathered_stats[j]; 282 for (j = 0; j < nn->num_tx_rings; j++) { 283 io_p = nn->ctrl_bar + NFP_NET_CFG_TXR_STATS(j); 284 data[i++] = readq(io_p); 285 io_p = nn->ctrl_bar + NFP_NET_CFG_TXR_STATS(j) + 8; 286 data[i++] = readq(io_p); 287 } 288 for (j = 0; j < nn->num_rx_rings; j++) { 289 io_p = nn->ctrl_bar + NFP_NET_CFG_RXR_STATS(j); 290 data[i++] = readq(io_p); 291 io_p = nn->ctrl_bar + NFP_NET_CFG_RXR_STATS(j) + 8; 292 data[i++] = readq(io_p); 293 } 294 } 295 296 static int nfp_net_get_sset_count(struct net_device *netdev, int sset) 297 { 298 struct nfp_net *nn = netdev_priv(netdev); 299 300 switch (sset) { 301 case ETH_SS_STATS: 302 return NN_ET_STATS_LEN; 303 default: 304 return -EOPNOTSUPP; 305 } 306 } 307 308 /* RX network flow classification (RSS, filters, etc) 309 */ 310 static u32 ethtool_flow_to_nfp_flag(u32 flow_type) 311 { 312 static const u32 xlate_ethtool_to_nfp[IPV6_FLOW + 1] = { 313 [TCP_V4_FLOW] = NFP_NET_CFG_RSS_IPV4_TCP, 314 [TCP_V6_FLOW] = NFP_NET_CFG_RSS_IPV6_TCP, 315 [UDP_V4_FLOW] = NFP_NET_CFG_RSS_IPV4_UDP, 316 [UDP_V6_FLOW] = NFP_NET_CFG_RSS_IPV6_UDP, 317 [IPV4_FLOW] = NFP_NET_CFG_RSS_IPV4, 318 [IPV6_FLOW] = NFP_NET_CFG_RSS_IPV6, 319 }; 320 321 if (flow_type >= ARRAY_SIZE(xlate_ethtool_to_nfp)) 322 return 0; 323 324 return xlate_ethtool_to_nfp[flow_type]; 325 } 326 327 static int nfp_net_get_rss_hash_opts(struct nfp_net *nn, 328 struct ethtool_rxnfc *cmd) 329 { 330 u32 nfp_rss_flag; 331 332 cmd->data = 0; 333 334 if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) 335 return -EOPNOTSUPP; 336 337 nfp_rss_flag = ethtool_flow_to_nfp_flag(cmd->flow_type); 338 if (!nfp_rss_flag) 339 return -EINVAL; 340 341 cmd->data |= RXH_IP_SRC | RXH_IP_DST; 342 if (nn->rss_cfg & nfp_rss_flag) 343 cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3; 344 345 return 0; 346 } 347 348 static int nfp_net_get_rxnfc(struct net_device *netdev, 349 struct ethtool_rxnfc *cmd, u32 *rule_locs) 350 { 351 struct nfp_net *nn = netdev_priv(netdev); 352 353 switch (cmd->cmd) { 354 case ETHTOOL_GRXRINGS: 355 cmd->data = nn->num_rx_rings; 356 return 0; 357 case ETHTOOL_GRXFH: 358 return nfp_net_get_rss_hash_opts(nn, cmd); 359 default: 360 return -EOPNOTSUPP; 361 } 362 } 363 364 static int nfp_net_set_rss_hash_opt(struct nfp_net *nn, 365 struct ethtool_rxnfc *nfc) 366 { 367 u32 new_rss_cfg = nn->rss_cfg; 368 u32 nfp_rss_flag; 369 int err; 370 371 if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) 372 return -EOPNOTSUPP; 373 374 /* RSS only supports IP SA/DA and L4 src/dst ports */ 375 if (nfc->data & ~(RXH_IP_SRC | RXH_IP_DST | 376 RXH_L4_B_0_1 | RXH_L4_B_2_3)) 377 return -EINVAL; 378 379 /* We need at least the IP SA/DA fields for hashing */ 380 if (!(nfc->data & RXH_IP_SRC) || 381 !(nfc->data & RXH_IP_DST)) 382 return -EINVAL; 383 384 nfp_rss_flag = ethtool_flow_to_nfp_flag(nfc->flow_type); 385 if (!nfp_rss_flag) 386 return -EINVAL; 387 388 switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) { 389 case 0: 390 new_rss_cfg &= ~nfp_rss_flag; 391 break; 392 case (RXH_L4_B_0_1 | RXH_L4_B_2_3): 393 new_rss_cfg |= nfp_rss_flag; 394 break; 395 default: 396 return -EINVAL; 397 } 398 399 new_rss_cfg |= NFP_NET_CFG_RSS_TOEPLITZ; 400 new_rss_cfg |= NFP_NET_CFG_RSS_MASK; 401 402 if (new_rss_cfg == nn->rss_cfg) 403 return 0; 404 405 writel(new_rss_cfg, nn->ctrl_bar + NFP_NET_CFG_RSS_CTRL); 406 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RSS); 407 if (err) 408 return err; 409 410 nn->rss_cfg = new_rss_cfg; 411 412 nn_dbg(nn, "Changed RSS config to 0x%x\n", nn->rss_cfg); 413 return 0; 414 } 415 416 static int nfp_net_set_rxnfc(struct net_device *netdev, 417 struct ethtool_rxnfc *cmd) 418 { 419 struct nfp_net *nn = netdev_priv(netdev); 420 421 switch (cmd->cmd) { 422 case ETHTOOL_SRXFH: 423 return nfp_net_set_rss_hash_opt(nn, cmd); 424 default: 425 return -EOPNOTSUPP; 426 } 427 } 428 429 static u32 nfp_net_get_rxfh_indir_size(struct net_device *netdev) 430 { 431 struct nfp_net *nn = netdev_priv(netdev); 432 433 if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) 434 return 0; 435 436 return ARRAY_SIZE(nn->rss_itbl); 437 } 438 439 static u32 nfp_net_get_rxfh_key_size(struct net_device *netdev) 440 { 441 return NFP_NET_CFG_RSS_KEY_SZ; 442 } 443 444 static int nfp_net_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key, 445 u8 *hfunc) 446 { 447 struct nfp_net *nn = netdev_priv(netdev); 448 int i; 449 450 if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) 451 return -EOPNOTSUPP; 452 453 if (indir) 454 for (i = 0; i < ARRAY_SIZE(nn->rss_itbl); i++) 455 indir[i] = nn->rss_itbl[i]; 456 if (key) 457 memcpy(key, nn->rss_key, NFP_NET_CFG_RSS_KEY_SZ); 458 if (hfunc) 459 *hfunc = ETH_RSS_HASH_TOP; 460 461 return 0; 462 } 463 464 static int nfp_net_set_rxfh(struct net_device *netdev, 465 const u32 *indir, const u8 *key, 466 const u8 hfunc) 467 { 468 struct nfp_net *nn = netdev_priv(netdev); 469 int i; 470 471 if (!(nn->cap & NFP_NET_CFG_CTRL_RSS) || 472 !(hfunc == ETH_RSS_HASH_NO_CHANGE || hfunc == ETH_RSS_HASH_TOP)) 473 return -EOPNOTSUPP; 474 475 if (!key && !indir) 476 return 0; 477 478 if (key) { 479 memcpy(nn->rss_key, key, NFP_NET_CFG_RSS_KEY_SZ); 480 nfp_net_rss_write_key(nn); 481 } 482 if (indir) { 483 for (i = 0; i < ARRAY_SIZE(nn->rss_itbl); i++) 484 nn->rss_itbl[i] = indir[i]; 485 486 nfp_net_rss_write_itbl(nn); 487 } 488 489 return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RSS); 490 } 491 492 /* Dump BAR registers 493 */ 494 static int nfp_net_get_regs_len(struct net_device *netdev) 495 { 496 return NFP_NET_CFG_BAR_SZ; 497 } 498 499 static void nfp_net_get_regs(struct net_device *netdev, 500 struct ethtool_regs *regs, void *p) 501 { 502 struct nfp_net *nn = netdev_priv(netdev); 503 u32 *regs_buf = p; 504 int i; 505 506 regs->version = nn_readl(nn, NFP_NET_CFG_VERSION); 507 508 for (i = 0; i < NFP_NET_CFG_BAR_SZ / sizeof(u32); i++) 509 regs_buf[i] = readl(nn->ctrl_bar + (i * sizeof(u32))); 510 } 511 512 static int nfp_net_get_coalesce(struct net_device *netdev, 513 struct ethtool_coalesce *ec) 514 { 515 struct nfp_net *nn = netdev_priv(netdev); 516 517 if (!(nn->cap & NFP_NET_CFG_CTRL_IRQMOD)) 518 return -EINVAL; 519 520 ec->rx_coalesce_usecs = nn->rx_coalesce_usecs; 521 ec->rx_max_coalesced_frames = nn->rx_coalesce_max_frames; 522 ec->tx_coalesce_usecs = nn->tx_coalesce_usecs; 523 ec->tx_max_coalesced_frames = nn->tx_coalesce_max_frames; 524 525 return 0; 526 } 527 528 static int nfp_net_set_coalesce(struct net_device *netdev, 529 struct ethtool_coalesce *ec) 530 { 531 struct nfp_net *nn = netdev_priv(netdev); 532 unsigned int factor; 533 534 if (ec->rx_coalesce_usecs_irq || 535 ec->rx_max_coalesced_frames_irq || 536 ec->tx_coalesce_usecs_irq || 537 ec->tx_max_coalesced_frames_irq || 538 ec->stats_block_coalesce_usecs || 539 ec->use_adaptive_rx_coalesce || 540 ec->use_adaptive_tx_coalesce || 541 ec->pkt_rate_low || 542 ec->rx_coalesce_usecs_low || 543 ec->rx_max_coalesced_frames_low || 544 ec->tx_coalesce_usecs_low || 545 ec->tx_max_coalesced_frames_low || 546 ec->pkt_rate_high || 547 ec->rx_coalesce_usecs_high || 548 ec->rx_max_coalesced_frames_high || 549 ec->tx_coalesce_usecs_high || 550 ec->tx_max_coalesced_frames_high || 551 ec->rate_sample_interval) 552 return -ENOTSUPP; 553 554 /* Compute factor used to convert coalesce '_usecs' parameters to 555 * ME timestamp ticks. There are 16 ME clock cycles for each timestamp 556 * count. 557 */ 558 factor = nn->me_freq_mhz / 16; 559 560 /* Each pair of (usecs, max_frames) fields specifies that interrupts 561 * should be coalesced until 562 * (usecs > 0 && time_since_first_completion >= usecs) || 563 * (max_frames > 0 && completed_frames >= max_frames) 564 * 565 * It is illegal to set both usecs and max_frames to zero as this would 566 * cause interrupts to never be generated. To disable coalescing, set 567 * usecs = 0 and max_frames = 1. 568 * 569 * Some implementations ignore the value of max_frames and use the 570 * condition time_since_first_completion >= usecs 571 */ 572 573 if (!(nn->cap & NFP_NET_CFG_CTRL_IRQMOD)) 574 return -EINVAL; 575 576 /* ensure valid configuration */ 577 if (!ec->rx_coalesce_usecs && !ec->rx_max_coalesced_frames) 578 return -EINVAL; 579 580 if (!ec->tx_coalesce_usecs && !ec->tx_max_coalesced_frames) 581 return -EINVAL; 582 583 if (ec->rx_coalesce_usecs * factor >= ((1 << 16) - 1)) 584 return -EINVAL; 585 586 if (ec->tx_coalesce_usecs * factor >= ((1 << 16) - 1)) 587 return -EINVAL; 588 589 if (ec->rx_max_coalesced_frames >= ((1 << 16) - 1)) 590 return -EINVAL; 591 592 if (ec->tx_max_coalesced_frames >= ((1 << 16) - 1)) 593 return -EINVAL; 594 595 /* configuration is valid */ 596 nn->rx_coalesce_usecs = ec->rx_coalesce_usecs; 597 nn->rx_coalesce_max_frames = ec->rx_max_coalesced_frames; 598 nn->tx_coalesce_usecs = ec->tx_coalesce_usecs; 599 nn->tx_coalesce_max_frames = ec->tx_max_coalesced_frames; 600 601 /* write configuration to device */ 602 nfp_net_coalesce_write_cfg(nn); 603 return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD); 604 } 605 606 static const struct ethtool_ops nfp_net_ethtool_ops = { 607 .get_drvinfo = nfp_net_get_drvinfo, 608 .get_ringparam = nfp_net_get_ringparam, 609 .set_ringparam = nfp_net_set_ringparam, 610 .get_strings = nfp_net_get_strings, 611 .get_ethtool_stats = nfp_net_get_stats, 612 .get_sset_count = nfp_net_get_sset_count, 613 .get_rxnfc = nfp_net_get_rxnfc, 614 .set_rxnfc = nfp_net_set_rxnfc, 615 .get_rxfh_indir_size = nfp_net_get_rxfh_indir_size, 616 .get_rxfh_key_size = nfp_net_get_rxfh_key_size, 617 .get_rxfh = nfp_net_get_rxfh, 618 .set_rxfh = nfp_net_set_rxfh, 619 .get_regs_len = nfp_net_get_regs_len, 620 .get_regs = nfp_net_get_regs, 621 .get_coalesce = nfp_net_get_coalesce, 622 .set_coalesce = nfp_net_set_coalesce, 623 }; 624 625 void nfp_net_set_ethtool_ops(struct net_device *netdev) 626 { 627 netdev->ethtool_ops = &nfp_net_ethtool_ops; 628 } 629