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/kernel.h> 44 #include <linux/netdevice.h> 45 #include <linux/etherdevice.h> 46 #include <linux/interrupt.h> 47 #include <linux/pci.h> 48 #include <linux/ethtool.h> 49 50 #include "nfp_net_ctrl.h" 51 #include "nfp_net.h" 52 53 /* Support for stats. Returns netdev, driver, and device stats */ 54 enum { NETDEV_ET_STATS, NFP_NET_DRV_ET_STATS, NFP_NET_DEV_ET_STATS }; 55 struct _nfp_net_et_stats { 56 char name[ETH_GSTRING_LEN]; 57 int type; 58 int sz; 59 int off; 60 }; 61 62 #define NN_ET_NETDEV_STAT(m) NETDEV_ET_STATS, \ 63 FIELD_SIZEOF(struct net_device_stats, m), \ 64 offsetof(struct net_device_stats, m) 65 /* For stats in the control BAR (other than Q stats) */ 66 #define NN_ET_DEV_STAT(m) NFP_NET_DEV_ET_STATS, \ 67 sizeof(u64), \ 68 (m) 69 static const struct _nfp_net_et_stats nfp_net_et_stats[] = { 70 /* netdev stats */ 71 {"rx_packets", NN_ET_NETDEV_STAT(rx_packets)}, 72 {"tx_packets", NN_ET_NETDEV_STAT(tx_packets)}, 73 {"rx_bytes", NN_ET_NETDEV_STAT(rx_bytes)}, 74 {"tx_bytes", NN_ET_NETDEV_STAT(tx_bytes)}, 75 {"rx_errors", NN_ET_NETDEV_STAT(rx_errors)}, 76 {"tx_errors", NN_ET_NETDEV_STAT(tx_errors)}, 77 {"rx_dropped", NN_ET_NETDEV_STAT(rx_dropped)}, 78 {"tx_dropped", NN_ET_NETDEV_STAT(tx_dropped)}, 79 {"multicast", NN_ET_NETDEV_STAT(multicast)}, 80 {"collisions", NN_ET_NETDEV_STAT(collisions)}, 81 {"rx_over_errors", NN_ET_NETDEV_STAT(rx_over_errors)}, 82 {"rx_crc_errors", NN_ET_NETDEV_STAT(rx_crc_errors)}, 83 {"rx_frame_errors", NN_ET_NETDEV_STAT(rx_frame_errors)}, 84 {"rx_fifo_errors", NN_ET_NETDEV_STAT(rx_fifo_errors)}, 85 {"rx_missed_errors", NN_ET_NETDEV_STAT(rx_missed_errors)}, 86 {"tx_aborted_errors", NN_ET_NETDEV_STAT(tx_aborted_errors)}, 87 {"tx_carrier_errors", NN_ET_NETDEV_STAT(tx_carrier_errors)}, 88 {"tx_fifo_errors", NN_ET_NETDEV_STAT(tx_fifo_errors)}, 89 /* Stats from the device */ 90 {"dev_rx_discards", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_DISCARDS)}, 91 {"dev_rx_errors", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_ERRORS)}, 92 {"dev_rx_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_OCTETS)}, 93 {"dev_rx_uc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_UC_OCTETS)}, 94 {"dev_rx_mc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_MC_OCTETS)}, 95 {"dev_rx_bc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_BC_OCTETS)}, 96 {"dev_rx_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_FRAMES)}, 97 {"dev_rx_mc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_MC_FRAMES)}, 98 {"dev_rx_bc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_BC_FRAMES)}, 99 100 {"dev_tx_discards", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_DISCARDS)}, 101 {"dev_tx_errors", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_ERRORS)}, 102 {"dev_tx_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_OCTETS)}, 103 {"dev_tx_uc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_UC_OCTETS)}, 104 {"dev_tx_mc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_MC_OCTETS)}, 105 {"dev_tx_bc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_BC_OCTETS)}, 106 {"dev_tx_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_FRAMES)}, 107 {"dev_tx_mc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_MC_FRAMES)}, 108 {"dev_tx_bc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_BC_FRAMES)}, 109 110 {"bpf_pass_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_APP0_FRAMES)}, 111 {"bpf_pass_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_APP0_BYTES)}, 112 /* see comments in outro functions in nfp_bpf_jit.c to find out 113 * how different BPF modes use app-specific counters 114 */ 115 {"bpf_app1_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_APP1_FRAMES)}, 116 {"bpf_app1_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_APP1_BYTES)}, 117 {"bpf_app2_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_APP2_FRAMES)}, 118 {"bpf_app2_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_APP2_BYTES)}, 119 {"bpf_app3_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_APP3_FRAMES)}, 120 {"bpf_app3_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_APP3_BYTES)}, 121 }; 122 123 #define NN_ET_GLOBAL_STATS_LEN ARRAY_SIZE(nfp_net_et_stats) 124 #define NN_ET_RVEC_STATS_LEN (nn->num_r_vecs * 3) 125 #define NN_ET_RVEC_GATHER_STATS 7 126 #define NN_ET_QUEUE_STATS_LEN ((nn->num_tx_rings + nn->num_rx_rings) * 2) 127 #define NN_ET_STATS_LEN (NN_ET_GLOBAL_STATS_LEN + NN_ET_RVEC_GATHER_STATS + \ 128 NN_ET_RVEC_STATS_LEN + NN_ET_QUEUE_STATS_LEN) 129 130 static void nfp_net_get_drvinfo(struct net_device *netdev, 131 struct ethtool_drvinfo *drvinfo) 132 { 133 struct nfp_net *nn = netdev_priv(netdev); 134 135 strlcpy(drvinfo->driver, nfp_net_driver_name, sizeof(drvinfo->driver)); 136 strlcpy(drvinfo->version, nfp_net_driver_version, 137 sizeof(drvinfo->version)); 138 139 snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version), 140 "%d.%d.%d.%d", 141 nn->fw_ver.resv, nn->fw_ver.class, 142 nn->fw_ver.major, nn->fw_ver.minor); 143 strlcpy(drvinfo->bus_info, pci_name(nn->pdev), 144 sizeof(drvinfo->bus_info)); 145 146 drvinfo->n_stats = NN_ET_STATS_LEN; 147 drvinfo->regdump_len = NFP_NET_CFG_BAR_SZ; 148 } 149 150 static void nfp_net_get_ringparam(struct net_device *netdev, 151 struct ethtool_ringparam *ring) 152 { 153 struct nfp_net *nn = netdev_priv(netdev); 154 155 ring->rx_max_pending = NFP_NET_MAX_RX_DESCS; 156 ring->tx_max_pending = NFP_NET_MAX_TX_DESCS; 157 ring->rx_pending = nn->rxd_cnt; 158 ring->tx_pending = nn->txd_cnt; 159 } 160 161 static int nfp_net_set_ringparam(struct net_device *netdev, 162 struct ethtool_ringparam *ring) 163 { 164 struct nfp_net *nn = netdev_priv(netdev); 165 u32 rxd_cnt, txd_cnt; 166 167 /* We don't have separate queues/rings for small/large frames. */ 168 if (ring->rx_mini_pending || ring->rx_jumbo_pending) 169 return -EINVAL; 170 171 /* Round up to supported values */ 172 rxd_cnt = roundup_pow_of_two(ring->rx_pending); 173 txd_cnt = roundup_pow_of_two(ring->tx_pending); 174 175 if (rxd_cnt < NFP_NET_MIN_RX_DESCS || rxd_cnt > NFP_NET_MAX_RX_DESCS || 176 txd_cnt < NFP_NET_MIN_TX_DESCS || txd_cnt > NFP_NET_MAX_TX_DESCS) 177 return -EINVAL; 178 179 if (nn->rxd_cnt == rxd_cnt && nn->txd_cnt == txd_cnt) 180 return 0; 181 182 nn_dbg(nn, "Change ring size: RxQ %u->%u, TxQ %u->%u\n", 183 nn->rxd_cnt, rxd_cnt, nn->txd_cnt, txd_cnt); 184 185 return nfp_net_set_ring_size(nn, rxd_cnt, txd_cnt); 186 } 187 188 static void nfp_net_get_strings(struct net_device *netdev, 189 u32 stringset, u8 *data) 190 { 191 struct nfp_net *nn = netdev_priv(netdev); 192 u8 *p = data; 193 int i; 194 195 switch (stringset) { 196 case ETH_SS_STATS: 197 for (i = 0; i < NN_ET_GLOBAL_STATS_LEN; i++) { 198 memcpy(p, nfp_net_et_stats[i].name, ETH_GSTRING_LEN); 199 p += ETH_GSTRING_LEN; 200 } 201 for (i = 0; i < nn->num_r_vecs; i++) { 202 sprintf(p, "rvec_%u_rx_pkts", i); 203 p += ETH_GSTRING_LEN; 204 sprintf(p, "rvec_%u_tx_pkts", i); 205 p += ETH_GSTRING_LEN; 206 sprintf(p, "rvec_%u_tx_busy", i); 207 p += ETH_GSTRING_LEN; 208 } 209 strncpy(p, "hw_rx_csum_ok", ETH_GSTRING_LEN); 210 p += ETH_GSTRING_LEN; 211 strncpy(p, "hw_rx_csum_inner_ok", ETH_GSTRING_LEN); 212 p += ETH_GSTRING_LEN; 213 strncpy(p, "hw_rx_csum_err", ETH_GSTRING_LEN); 214 p += ETH_GSTRING_LEN; 215 strncpy(p, "hw_tx_csum", ETH_GSTRING_LEN); 216 p += ETH_GSTRING_LEN; 217 strncpy(p, "hw_tx_inner_csum", ETH_GSTRING_LEN); 218 p += ETH_GSTRING_LEN; 219 strncpy(p, "tx_gather", ETH_GSTRING_LEN); 220 p += ETH_GSTRING_LEN; 221 strncpy(p, "tx_lso", ETH_GSTRING_LEN); 222 p += ETH_GSTRING_LEN; 223 for (i = 0; i < nn->num_tx_rings; i++) { 224 sprintf(p, "txq_%u_pkts", i); 225 p += ETH_GSTRING_LEN; 226 sprintf(p, "txq_%u_bytes", i); 227 p += ETH_GSTRING_LEN; 228 } 229 for (i = 0; i < nn->num_rx_rings; i++) { 230 sprintf(p, "rxq_%u_pkts", i); 231 p += ETH_GSTRING_LEN; 232 sprintf(p, "rxq_%u_bytes", i); 233 p += ETH_GSTRING_LEN; 234 } 235 break; 236 } 237 } 238 239 static void nfp_net_get_stats(struct net_device *netdev, 240 struct ethtool_stats *stats, u64 *data) 241 { 242 u64 gathered_stats[NN_ET_RVEC_GATHER_STATS] = {}; 243 struct nfp_net *nn = netdev_priv(netdev); 244 struct rtnl_link_stats64 *netdev_stats; 245 struct rtnl_link_stats64 temp = {}; 246 u64 tmp[NN_ET_RVEC_GATHER_STATS]; 247 u8 __iomem *io_p; 248 int i, j, k; 249 u8 *p; 250 251 netdev_stats = dev_get_stats(netdev, &temp); 252 253 for (i = 0; i < NN_ET_GLOBAL_STATS_LEN; i++) { 254 switch (nfp_net_et_stats[i].type) { 255 case NETDEV_ET_STATS: 256 p = (char *)netdev_stats + nfp_net_et_stats[i].off; 257 data[i] = nfp_net_et_stats[i].sz == sizeof(u64) ? 258 *(u64 *)p : *(u32 *)p; 259 break; 260 261 case NFP_NET_DEV_ET_STATS: 262 io_p = nn->ctrl_bar + nfp_net_et_stats[i].off; 263 data[i] = readq(io_p); 264 break; 265 } 266 } 267 for (j = 0; j < nn->num_r_vecs; j++) { 268 unsigned int start; 269 270 do { 271 start = u64_stats_fetch_begin(&nn->r_vecs[j].rx_sync); 272 data[i++] = nn->r_vecs[j].rx_pkts; 273 tmp[0] = nn->r_vecs[j].hw_csum_rx_ok; 274 tmp[1] = nn->r_vecs[j].hw_csum_rx_inner_ok; 275 tmp[2] = nn->r_vecs[j].hw_csum_rx_error; 276 } while (u64_stats_fetch_retry(&nn->r_vecs[j].rx_sync, start)); 277 278 do { 279 start = u64_stats_fetch_begin(&nn->r_vecs[j].tx_sync); 280 data[i++] = nn->r_vecs[j].tx_pkts; 281 data[i++] = nn->r_vecs[j].tx_busy; 282 tmp[3] = nn->r_vecs[j].hw_csum_tx; 283 tmp[4] = nn->r_vecs[j].hw_csum_tx_inner; 284 tmp[5] = nn->r_vecs[j].tx_gather; 285 tmp[6] = nn->r_vecs[j].tx_lso; 286 } while (u64_stats_fetch_retry(&nn->r_vecs[j].tx_sync, start)); 287 288 for (k = 0; k < NN_ET_RVEC_GATHER_STATS; k++) 289 gathered_stats[k] += tmp[k]; 290 } 291 for (j = 0; j < NN_ET_RVEC_GATHER_STATS; j++) 292 data[i++] = gathered_stats[j]; 293 for (j = 0; j < nn->num_tx_rings; j++) { 294 io_p = nn->ctrl_bar + NFP_NET_CFG_TXR_STATS(j); 295 data[i++] = readq(io_p); 296 io_p = nn->ctrl_bar + NFP_NET_CFG_TXR_STATS(j) + 8; 297 data[i++] = readq(io_p); 298 } 299 for (j = 0; j < nn->num_rx_rings; j++) { 300 io_p = nn->ctrl_bar + NFP_NET_CFG_RXR_STATS(j); 301 data[i++] = readq(io_p); 302 io_p = nn->ctrl_bar + NFP_NET_CFG_RXR_STATS(j) + 8; 303 data[i++] = readq(io_p); 304 } 305 } 306 307 static int nfp_net_get_sset_count(struct net_device *netdev, int sset) 308 { 309 struct nfp_net *nn = netdev_priv(netdev); 310 311 switch (sset) { 312 case ETH_SS_STATS: 313 return NN_ET_STATS_LEN; 314 default: 315 return -EOPNOTSUPP; 316 } 317 } 318 319 /* RX network flow classification (RSS, filters, etc) 320 */ 321 static u32 ethtool_flow_to_nfp_flag(u32 flow_type) 322 { 323 static const u32 xlate_ethtool_to_nfp[IPV6_FLOW + 1] = { 324 [TCP_V4_FLOW] = NFP_NET_CFG_RSS_IPV4_TCP, 325 [TCP_V6_FLOW] = NFP_NET_CFG_RSS_IPV6_TCP, 326 [UDP_V4_FLOW] = NFP_NET_CFG_RSS_IPV4_UDP, 327 [UDP_V6_FLOW] = NFP_NET_CFG_RSS_IPV6_UDP, 328 [IPV4_FLOW] = NFP_NET_CFG_RSS_IPV4, 329 [IPV6_FLOW] = NFP_NET_CFG_RSS_IPV6, 330 }; 331 332 if (flow_type >= ARRAY_SIZE(xlate_ethtool_to_nfp)) 333 return 0; 334 335 return xlate_ethtool_to_nfp[flow_type]; 336 } 337 338 static int nfp_net_get_rss_hash_opts(struct nfp_net *nn, 339 struct ethtool_rxnfc *cmd) 340 { 341 u32 nfp_rss_flag; 342 343 cmd->data = 0; 344 345 if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) 346 return -EOPNOTSUPP; 347 348 nfp_rss_flag = ethtool_flow_to_nfp_flag(cmd->flow_type); 349 if (!nfp_rss_flag) 350 return -EINVAL; 351 352 cmd->data |= RXH_IP_SRC | RXH_IP_DST; 353 if (nn->rss_cfg & nfp_rss_flag) 354 cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3; 355 356 return 0; 357 } 358 359 static int nfp_net_get_rxnfc(struct net_device *netdev, 360 struct ethtool_rxnfc *cmd, u32 *rule_locs) 361 { 362 struct nfp_net *nn = netdev_priv(netdev); 363 364 switch (cmd->cmd) { 365 case ETHTOOL_GRXRINGS: 366 cmd->data = nn->num_rx_rings; 367 return 0; 368 case ETHTOOL_GRXFH: 369 return nfp_net_get_rss_hash_opts(nn, cmd); 370 default: 371 return -EOPNOTSUPP; 372 } 373 } 374 375 static int nfp_net_set_rss_hash_opt(struct nfp_net *nn, 376 struct ethtool_rxnfc *nfc) 377 { 378 u32 new_rss_cfg = nn->rss_cfg; 379 u32 nfp_rss_flag; 380 int err; 381 382 if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) 383 return -EOPNOTSUPP; 384 385 /* RSS only supports IP SA/DA and L4 src/dst ports */ 386 if (nfc->data & ~(RXH_IP_SRC | RXH_IP_DST | 387 RXH_L4_B_0_1 | RXH_L4_B_2_3)) 388 return -EINVAL; 389 390 /* We need at least the IP SA/DA fields for hashing */ 391 if (!(nfc->data & RXH_IP_SRC) || 392 !(nfc->data & RXH_IP_DST)) 393 return -EINVAL; 394 395 nfp_rss_flag = ethtool_flow_to_nfp_flag(nfc->flow_type); 396 if (!nfp_rss_flag) 397 return -EINVAL; 398 399 switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) { 400 case 0: 401 new_rss_cfg &= ~nfp_rss_flag; 402 break; 403 case (RXH_L4_B_0_1 | RXH_L4_B_2_3): 404 new_rss_cfg |= nfp_rss_flag; 405 break; 406 default: 407 return -EINVAL; 408 } 409 410 new_rss_cfg |= NFP_NET_CFG_RSS_TOEPLITZ; 411 new_rss_cfg |= NFP_NET_CFG_RSS_MASK; 412 413 if (new_rss_cfg == nn->rss_cfg) 414 return 0; 415 416 writel(new_rss_cfg, nn->ctrl_bar + NFP_NET_CFG_RSS_CTRL); 417 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RSS); 418 if (err) 419 return err; 420 421 nn->rss_cfg = new_rss_cfg; 422 423 nn_dbg(nn, "Changed RSS config to 0x%x\n", nn->rss_cfg); 424 return 0; 425 } 426 427 static int nfp_net_set_rxnfc(struct net_device *netdev, 428 struct ethtool_rxnfc *cmd) 429 { 430 struct nfp_net *nn = netdev_priv(netdev); 431 432 switch (cmd->cmd) { 433 case ETHTOOL_SRXFH: 434 return nfp_net_set_rss_hash_opt(nn, cmd); 435 default: 436 return -EOPNOTSUPP; 437 } 438 } 439 440 static u32 nfp_net_get_rxfh_indir_size(struct net_device *netdev) 441 { 442 struct nfp_net *nn = netdev_priv(netdev); 443 444 if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) 445 return 0; 446 447 return ARRAY_SIZE(nn->rss_itbl); 448 } 449 450 static u32 nfp_net_get_rxfh_key_size(struct net_device *netdev) 451 { 452 return NFP_NET_CFG_RSS_KEY_SZ; 453 } 454 455 static int nfp_net_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key, 456 u8 *hfunc) 457 { 458 struct nfp_net *nn = netdev_priv(netdev); 459 int i; 460 461 if (!(nn->cap & NFP_NET_CFG_CTRL_RSS)) 462 return -EOPNOTSUPP; 463 464 if (indir) 465 for (i = 0; i < ARRAY_SIZE(nn->rss_itbl); i++) 466 indir[i] = nn->rss_itbl[i]; 467 if (key) 468 memcpy(key, nn->rss_key, NFP_NET_CFG_RSS_KEY_SZ); 469 if (hfunc) 470 *hfunc = ETH_RSS_HASH_TOP; 471 472 return 0; 473 } 474 475 static int nfp_net_set_rxfh(struct net_device *netdev, 476 const u32 *indir, const u8 *key, 477 const u8 hfunc) 478 { 479 struct nfp_net *nn = netdev_priv(netdev); 480 int i; 481 482 if (!(nn->cap & NFP_NET_CFG_CTRL_RSS) || 483 !(hfunc == ETH_RSS_HASH_NO_CHANGE || hfunc == ETH_RSS_HASH_TOP)) 484 return -EOPNOTSUPP; 485 486 if (!key && !indir) 487 return 0; 488 489 if (key) { 490 memcpy(nn->rss_key, key, NFP_NET_CFG_RSS_KEY_SZ); 491 nfp_net_rss_write_key(nn); 492 } 493 if (indir) { 494 for (i = 0; i < ARRAY_SIZE(nn->rss_itbl); i++) 495 nn->rss_itbl[i] = indir[i]; 496 497 nfp_net_rss_write_itbl(nn); 498 } 499 500 return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RSS); 501 } 502 503 /* Dump BAR registers 504 */ 505 static int nfp_net_get_regs_len(struct net_device *netdev) 506 { 507 return NFP_NET_CFG_BAR_SZ; 508 } 509 510 static void nfp_net_get_regs(struct net_device *netdev, 511 struct ethtool_regs *regs, void *p) 512 { 513 struct nfp_net *nn = netdev_priv(netdev); 514 u32 *regs_buf = p; 515 int i; 516 517 regs->version = nn_readl(nn, NFP_NET_CFG_VERSION); 518 519 for (i = 0; i < NFP_NET_CFG_BAR_SZ / sizeof(u32); i++) 520 regs_buf[i] = readl(nn->ctrl_bar + (i * sizeof(u32))); 521 } 522 523 static int nfp_net_get_coalesce(struct net_device *netdev, 524 struct ethtool_coalesce *ec) 525 { 526 struct nfp_net *nn = netdev_priv(netdev); 527 528 if (!(nn->cap & NFP_NET_CFG_CTRL_IRQMOD)) 529 return -EINVAL; 530 531 ec->rx_coalesce_usecs = nn->rx_coalesce_usecs; 532 ec->rx_max_coalesced_frames = nn->rx_coalesce_max_frames; 533 ec->tx_coalesce_usecs = nn->tx_coalesce_usecs; 534 ec->tx_max_coalesced_frames = nn->tx_coalesce_max_frames; 535 536 return 0; 537 } 538 539 static int nfp_net_set_coalesce(struct net_device *netdev, 540 struct ethtool_coalesce *ec) 541 { 542 struct nfp_net *nn = netdev_priv(netdev); 543 unsigned int factor; 544 545 if (ec->rx_coalesce_usecs_irq || 546 ec->rx_max_coalesced_frames_irq || 547 ec->tx_coalesce_usecs_irq || 548 ec->tx_max_coalesced_frames_irq || 549 ec->stats_block_coalesce_usecs || 550 ec->use_adaptive_rx_coalesce || 551 ec->use_adaptive_tx_coalesce || 552 ec->pkt_rate_low || 553 ec->rx_coalesce_usecs_low || 554 ec->rx_max_coalesced_frames_low || 555 ec->tx_coalesce_usecs_low || 556 ec->tx_max_coalesced_frames_low || 557 ec->pkt_rate_high || 558 ec->rx_coalesce_usecs_high || 559 ec->rx_max_coalesced_frames_high || 560 ec->tx_coalesce_usecs_high || 561 ec->tx_max_coalesced_frames_high || 562 ec->rate_sample_interval) 563 return -ENOTSUPP; 564 565 /* Compute factor used to convert coalesce '_usecs' parameters to 566 * ME timestamp ticks. There are 16 ME clock cycles for each timestamp 567 * count. 568 */ 569 factor = nn->me_freq_mhz / 16; 570 571 /* Each pair of (usecs, max_frames) fields specifies that interrupts 572 * should be coalesced until 573 * (usecs > 0 && time_since_first_completion >= usecs) || 574 * (max_frames > 0 && completed_frames >= max_frames) 575 * 576 * It is illegal to set both usecs and max_frames to zero as this would 577 * cause interrupts to never be generated. To disable coalescing, set 578 * usecs = 0 and max_frames = 1. 579 * 580 * Some implementations ignore the value of max_frames and use the 581 * condition time_since_first_completion >= usecs 582 */ 583 584 if (!(nn->cap & NFP_NET_CFG_CTRL_IRQMOD)) 585 return -EINVAL; 586 587 /* ensure valid configuration */ 588 if (!ec->rx_coalesce_usecs && !ec->rx_max_coalesced_frames) 589 return -EINVAL; 590 591 if (!ec->tx_coalesce_usecs && !ec->tx_max_coalesced_frames) 592 return -EINVAL; 593 594 if (ec->rx_coalesce_usecs * factor >= ((1 << 16) - 1)) 595 return -EINVAL; 596 597 if (ec->tx_coalesce_usecs * factor >= ((1 << 16) - 1)) 598 return -EINVAL; 599 600 if (ec->rx_max_coalesced_frames >= ((1 << 16) - 1)) 601 return -EINVAL; 602 603 if (ec->tx_max_coalesced_frames >= ((1 << 16) - 1)) 604 return -EINVAL; 605 606 /* configuration is valid */ 607 nn->rx_coalesce_usecs = ec->rx_coalesce_usecs; 608 nn->rx_coalesce_max_frames = ec->rx_max_coalesced_frames; 609 nn->tx_coalesce_usecs = ec->tx_coalesce_usecs; 610 nn->tx_coalesce_max_frames = ec->tx_max_coalesced_frames; 611 612 /* write configuration to device */ 613 nfp_net_coalesce_write_cfg(nn); 614 return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD); 615 } 616 617 static const struct ethtool_ops nfp_net_ethtool_ops = { 618 .get_drvinfo = nfp_net_get_drvinfo, 619 .get_link = ethtool_op_get_link, 620 .get_ringparam = nfp_net_get_ringparam, 621 .set_ringparam = nfp_net_set_ringparam, 622 .get_strings = nfp_net_get_strings, 623 .get_ethtool_stats = nfp_net_get_stats, 624 .get_sset_count = nfp_net_get_sset_count, 625 .get_rxnfc = nfp_net_get_rxnfc, 626 .set_rxnfc = nfp_net_set_rxnfc, 627 .get_rxfh_indir_size = nfp_net_get_rxfh_indir_size, 628 .get_rxfh_key_size = nfp_net_get_rxfh_key_size, 629 .get_rxfh = nfp_net_get_rxfh, 630 .set_rxfh = nfp_net_set_rxfh, 631 .get_regs_len = nfp_net_get_regs_len, 632 .get_regs = nfp_net_get_regs, 633 .get_coalesce = nfp_net_get_coalesce, 634 .set_coalesce = nfp_net_set_coalesce, 635 }; 636 637 void nfp_net_set_ethtool_ops(struct net_device *netdev) 638 { 639 netdev->ethtool_ops = &nfp_net_ethtool_ops; 640 } 641