ceph/src/seastar/dpdk/drivers/net/nfp/nfpcore/nfp_nsp_eth.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2018 Netronome Systems, Inc.
   3  * All rights reserved.
   4  */
   5
   6 #include <stdio.h>
   7 #include <rte_common.h>
   8 #include <rte_byteorder.h>
   9 #include "nfp_cpp.h"
  10 #include "nfp_nsp.h"
  11 #include "nfp6000/nfp6000.h"
  12
  13 #define GENMASK_ULL(h, l) \
  14         (((~0ULL) - (1ULL << (l)) + 1) & \
  15          (~0ULL >> (64 - 1 - (h))))
  16
  17 #define __bf_shf(x) (__builtin_ffsll(x) - 1)
  18
  19 #define FIELD_GET(_mask, _reg)                                          \
  20         (__extension__ ({ \
  21                 typeof(_mask) _x = (_mask); \
  22                 (typeof(_x))(((_reg) & (_x)) >> __bf_shf(_x));  \
  23         }))
  24
  25 #define FIELD_FIT(_mask, _val)                                          \
  26         (__extension__ ({ \
  27                 typeof(_mask) _x = (_mask); \
  28                 !((((typeof(_x))_val) << __bf_shf(_x)) & ~(_x)); \
  29         }))
  30
  31 #define FIELD_PREP(_mask, _val)                                         \
  32         (__extension__ ({ \
  33                 typeof(_mask) _x = (_mask); \
  34                 ((typeof(_x))(_val) << __bf_shf(_x)) & (_x);    \
  35         }))
  36
  37 #define NSP_ETH_NBI_PORT_COUNT          24
  38 #define NSP_ETH_MAX_COUNT               (2 * NSP_ETH_NBI_PORT_COUNT)
  39 #define NSP_ETH_TABLE_SIZE              (NSP_ETH_MAX_COUNT *            \
  40                                          sizeof(union eth_table_entry))
  41
  42 #define NSP_ETH_PORT_LANES              GENMASK_ULL(3, 0)
  43 #define NSP_ETH_PORT_INDEX              GENMASK_ULL(15, 8)
  44 #define NSP_ETH_PORT_LABEL              GENMASK_ULL(53, 48)
  45 #define NSP_ETH_PORT_PHYLABEL           GENMASK_ULL(59, 54)
  46 #define NSP_ETH_PORT_FEC_SUPP_BASER     BIT_ULL(60)
  47 #define NSP_ETH_PORT_FEC_SUPP_RS        BIT_ULL(61)
  48
  49 #define NSP_ETH_PORT_LANES_MASK         rte_cpu_to_le_64(NSP_ETH_PORT_LANES)
  50
  51 #define NSP_ETH_STATE_CONFIGURED        BIT_ULL(0)
  52 #define NSP_ETH_STATE_ENABLED           BIT_ULL(1)
  53 #define NSP_ETH_STATE_TX_ENABLED        BIT_ULL(2)
  54 #define NSP_ETH_STATE_RX_ENABLED        BIT_ULL(3)
  55 #define NSP_ETH_STATE_RATE              GENMASK_ULL(11, 8)
  56 #define NSP_ETH_STATE_INTERFACE         GENMASK_ULL(19, 12)
  57 #define NSP_ETH_STATE_MEDIA             GENMASK_ULL(21, 20)
  58 #define NSP_ETH_STATE_OVRD_CHNG         BIT_ULL(22)
  59 #define NSP_ETH_STATE_ANEG              GENMASK_ULL(25, 23)
  60 #define NSP_ETH_STATE_FEC               GENMASK_ULL(27, 26)
  61
  62 #define NSP_ETH_CTRL_CONFIGURED         BIT_ULL(0)
  63 #define NSP_ETH_CTRL_ENABLED            BIT_ULL(1)
  64 #define NSP_ETH_CTRL_TX_ENABLED         BIT_ULL(2)
  65 #define NSP_ETH_CTRL_RX_ENABLED         BIT_ULL(3)
  66 #define NSP_ETH_CTRL_SET_RATE           BIT_ULL(4)
  67 #define NSP_ETH_CTRL_SET_LANES          BIT_ULL(5)
  68 #define NSP_ETH_CTRL_SET_ANEG           BIT_ULL(6)
  69 #define NSP_ETH_CTRL_SET_FEC            BIT_ULL(7)
  70
  71 /* Which connector port. */
  72 #define PORT_TP                 0x00
  73 #define PORT_AUI                0x01
  74 #define PORT_MII                0x02
  75 #define PORT_FIBRE              0x03
  76 #define PORT_BNC                0x04
  77 #define PORT_DA                 0x05
  78 #define PORT_NONE               0xef
  79 #define PORT_OTHER              0xff
  80
  81 #define SPEED_10                10
  82 #define SPEED_100               100
  83 #define SPEED_1000              1000
  84 #define SPEED_2500              2500
  85 #define SPEED_5000              5000
  86 #define SPEED_10000             10000
  87 #define SPEED_14000             14000
  88 #define SPEED_20000             20000
  89 #define SPEED_25000             25000
  90 #define SPEED_40000             40000
  91 #define SPEED_50000             50000
  92 #define SPEED_56000             56000
  93 #define SPEED_100000            100000
  94
  95 enum nfp_eth_raw {
  96         NSP_ETH_RAW_PORT = 0,
  97         NSP_ETH_RAW_STATE,
  98         NSP_ETH_RAW_MAC,
  99         NSP_ETH_RAW_CONTROL,
 100
 101         NSP_ETH_NUM_RAW
 102 };
 103
 104 enum nfp_eth_rate {
 105         RATE_INVALID = 0,
 106         RATE_10M,
 107         RATE_100M,
 108         RATE_1G,
 109         RATE_10G,
 110         RATE_25G,
 111 };
 112
 113 union eth_table_entry {
 114         struct {
 115                 uint64_t port;
 116                 uint64_t state;
 117                 uint8_t mac_addr[6];
 118                 uint8_t resv[2];
 119                 uint64_t control;
 120         };
 121         uint64_t raw[NSP_ETH_NUM_RAW];
 122 };
 123
 124 static const struct {
 125         enum nfp_eth_rate rate;
 126         unsigned int speed;
 127 } nsp_eth_rate_tbl[] = {
 128         { RATE_INVALID, 0, },
 129         { RATE_10M,     SPEED_10, },
 130         { RATE_100M,    SPEED_100, },
 131         { RATE_1G,      SPEED_1000, },
 132         { RATE_10G,     SPEED_10000, },
 133         { RATE_25G,     SPEED_25000, },
 134 };
 135
 136 static unsigned int
 137 nfp_eth_rate2speed(enum nfp_eth_rate rate)
 138 {
 139         int i;
 140
 141         for (i = 0; i < (int)ARRAY_SIZE(nsp_eth_rate_tbl); i++)
 142                 if (nsp_eth_rate_tbl[i].rate == rate)
 143                         return nsp_eth_rate_tbl[i].speed;
 144
 145         return 0;
 146 }
 147
 148 static unsigned int
 149 nfp_eth_speed2rate(unsigned int speed)
 150 {
 151         int i;
 152
 153         for (i = 0; i < (int)ARRAY_SIZE(nsp_eth_rate_tbl); i++)
 154                 if (nsp_eth_rate_tbl[i].speed == speed)
 155                         return nsp_eth_rate_tbl[i].rate;
 156
 157         return RATE_INVALID;
 158 }
 159
 160 static void
 161 nfp_eth_copy_mac_reverse(uint8_t *dst, const uint8_t *src)
 162 {
 163         int i;
 164
 165         for (i = 0; i < (int)ETH_ALEN; i++)
 166                 dst[ETH_ALEN - i - 1] = src[i];
 167 }
 168
 169 static void
 170 nfp_eth_port_translate(struct nfp_nsp *nsp, const union eth_table_entry *src,
 171                        unsigned int index, struct nfp_eth_table_port *dst)
 172 {
 173         unsigned int rate;
 174         unsigned int fec;
 175         uint64_t port, state;
 176
 177         port = rte_le_to_cpu_64(src->port);
 178         state = rte_le_to_cpu_64(src->state);
 179
 180         dst->eth_index = FIELD_GET(NSP_ETH_PORT_INDEX, port);
 181         dst->index = index;
 182         dst->nbi = index / NSP_ETH_NBI_PORT_COUNT;
 183         dst->base = index % NSP_ETH_NBI_PORT_COUNT;
 184         dst->lanes = FIELD_GET(NSP_ETH_PORT_LANES, port);
 185
 186         dst->enabled = FIELD_GET(NSP_ETH_STATE_ENABLED, state);
 187         dst->tx_enabled = FIELD_GET(NSP_ETH_STATE_TX_ENABLED, state);
 188         dst->rx_enabled = FIELD_GET(NSP_ETH_STATE_RX_ENABLED, state);
 189
 190         rate = nfp_eth_rate2speed(FIELD_GET(NSP_ETH_STATE_RATE, state));
 191         dst->speed = dst->lanes * rate;
 192
 193         dst->interface = FIELD_GET(NSP_ETH_STATE_INTERFACE, state);
 194         dst->media = FIELD_GET(NSP_ETH_STATE_MEDIA, state);
 195
 196         nfp_eth_copy_mac_reverse(dst->mac_addr, src->mac_addr);
 197
 198         dst->label_port = FIELD_GET(NSP_ETH_PORT_PHYLABEL, port);
 199         dst->label_subport = FIELD_GET(NSP_ETH_PORT_LABEL, port);
 200
 201         if (nfp_nsp_get_abi_ver_minor(nsp) < 17)
 202                 return;
 203
 204         dst->override_changed = FIELD_GET(NSP_ETH_STATE_OVRD_CHNG, state);
 205         dst->aneg = FIELD_GET(NSP_ETH_STATE_ANEG, state);
 206
 207         if (nfp_nsp_get_abi_ver_minor(nsp) < 22)
 208                 return;
 209
 210         fec = FIELD_GET(NSP_ETH_PORT_FEC_SUPP_BASER, port);
 211         dst->fec_modes_supported |= fec << NFP_FEC_BASER_BIT;
 212         fec = FIELD_GET(NSP_ETH_PORT_FEC_SUPP_RS, port);
 213         dst->fec_modes_supported |= fec << NFP_FEC_REED_SOLOMON_BIT;
 214         if (dst->fec_modes_supported)
 215                 dst->fec_modes_supported |= NFP_FEC_AUTO | NFP_FEC_DISABLED;
 216
 217         dst->fec = 1 << FIELD_GET(NSP_ETH_STATE_FEC, state);
 218 }
 219
 220 static void
 221 nfp_eth_calc_port_geometry(struct nfp_eth_table *table)
 222 {
 223         unsigned int i, j;
 224
 225         for (i = 0; i < table->count; i++) {
 226                 table->max_index = RTE_MAX(table->max_index,
 227                                            table->ports[i].index);
 228
 229                 for (j = 0; j < table->count; j++) {
 230                         if (table->ports[i].label_port !=
 231                             table->ports[j].label_port)
 232                                 continue;
 233                         table->ports[i].port_lanes += table->ports[j].lanes;
 234
 235                         if (i == j)
 236                                 continue;
 237                         if (table->ports[i].label_subport ==
 238                             table->ports[j].label_subport)
 239                                 printf("Port %d subport %d is a duplicate\n",
 240                                          table->ports[i].label_port,
 241                                          table->ports[i].label_subport);
 242
 243                         table->ports[i].is_split = 1;
 244                 }
 245         }
 246 }
 247
 248 static void
 249 nfp_eth_calc_port_type(struct nfp_eth_table_port *entry)
 250 {
 251         if (entry->interface == NFP_INTERFACE_NONE) {
 252                 entry->port_type = PORT_NONE;
 253                 return;
 254         }
 255
 256         if (entry->media == NFP_MEDIA_FIBRE)
 257                 entry->port_type = PORT_FIBRE;
 258         else
 259                 entry->port_type = PORT_DA;
 260 }
 261
 262 static struct nfp_eth_table *
 263 __nfp_eth_read_ports(struct nfp_nsp *nsp)
 264 {
 265         union eth_table_entry *entries;
 266         struct nfp_eth_table *table;
 267         uint32_t table_sz;
 268         int i, j, ret, cnt = 0;
 269
 270         entries = malloc(NSP_ETH_TABLE_SIZE);
 271         if (!entries)
 272                 return NULL;
 273
 274         memset(entries, 0, NSP_ETH_TABLE_SIZE);
 275         ret = nfp_nsp_read_eth_table(nsp, entries, NSP_ETH_TABLE_SIZE);
 276         if (ret < 0) {
 277                 printf("reading port table failed %d\n", ret);
 278                 goto err;
 279         }
 280
 281         for (i = 0; i < NSP_ETH_MAX_COUNT; i++)
 282                 if (entries[i].port & NSP_ETH_PORT_LANES_MASK)
 283                         cnt++;
 284
 285         /* Some versions of flash will give us 0 instead of port count. For
 286          * those that give a port count, verify it against the value calculated
 287          * above.
 288          */
 289         if (ret && ret != cnt) {
 290                 printf("table entry count (%d) unmatch entries present (%d)\n",
 291                        ret, cnt);
 292                 goto err;
 293         }
 294
 295         table_sz = sizeof(*table) + sizeof(struct nfp_eth_table_port) * cnt;
 296         table = malloc(table_sz);
 297         if (!table)
 298                 goto err;
 299
 300         memset(table, 0, table_sz);
 301         table->count = cnt;
 302         for (i = 0, j = 0; i < NSP_ETH_MAX_COUNT; i++)
 303                 if (entries[i].port & NSP_ETH_PORT_LANES_MASK)
 304                         nfp_eth_port_translate(nsp, &entries[i], i,
 305                                                &table->ports[j++]);
 306
 307         nfp_eth_calc_port_geometry(table);
 308         for (i = 0; i < (int)table->count; i++)
 309                 nfp_eth_calc_port_type(&table->ports[i]);
 310
 311         free(entries);
 312
 313         return table;
 314
 315 err:
 316         free(entries);
 317         return NULL;
 318 }
 319
 320 /*
 321  * nfp_eth_read_ports() - retrieve port information
 322  * @cpp:        NFP CPP handle
 323  *
 324  * Read the port information from the device.  Returned structure should
 325  * be freed with kfree() once no longer needed.
 326  *
 327  * Return: populated ETH table or NULL on error.
 328  */
 329 struct nfp_eth_table *
 330 nfp_eth_read_ports(struct nfp_cpp *cpp)
 331 {
 332         struct nfp_eth_table *ret;
 333         struct nfp_nsp *nsp;
 334
 335         nsp = nfp_nsp_open(cpp);
 336         if (!nsp)
 337                 return NULL;
 338
 339         ret = __nfp_eth_read_ports(nsp);
 340         nfp_nsp_close(nsp);
 341
 342         return ret;
 343 }
 344
 345 struct nfp_nsp *
 346 nfp_eth_config_start(struct nfp_cpp *cpp, unsigned int idx)
 347 {
 348         union eth_table_entry *entries;
 349         struct nfp_nsp *nsp;
 350         int ret;
 351
 352         entries = malloc(NSP_ETH_TABLE_SIZE);
 353         if (!entries)
 354                 return NULL;
 355
 356         memset(entries, 0, NSP_ETH_TABLE_SIZE);
 357         nsp = nfp_nsp_open(cpp);
 358         if (!nsp) {
 359                 free(entries);
 360                 return nsp;
 361         }
 362
 363         ret = nfp_nsp_read_eth_table(nsp, entries, NSP_ETH_TABLE_SIZE);
 364         if (ret < 0) {
 365                 printf("reading port table failed %d\n", ret);
 366                 goto err;
 367         }
 368
 369         if (!(entries[idx].port & NSP_ETH_PORT_LANES_MASK)) {
 370                 printf("trying to set port state on disabled port %d\n", idx);
 371                 goto err;
 372         }
 373
 374         nfp_nsp_config_set_state(nsp, entries, idx);
 375         return nsp;
 376
 377 err:
 378         nfp_nsp_close(nsp);
 379         free(entries);
 380         return NULL;
 381 }
 382
 383 void
 384 nfp_eth_config_cleanup_end(struct nfp_nsp *nsp)
 385 {
 386         union eth_table_entry *entries = nfp_nsp_config_entries(nsp);
 387
 388         nfp_nsp_config_set_modified(nsp, 0);
 389         nfp_nsp_config_clear_state(nsp);
 390         nfp_nsp_close(nsp);
 391         free(entries);
 392 }
 393
 394 /*
 395  * nfp_eth_config_commit_end() - perform recorded configuration changes
 396  * @nsp:        NFP NSP handle returned from nfp_eth_config_start()
 397  *
 398  * Perform the configuration which was requested with __nfp_eth_set_*()
 399  * helpers and recorded in @nsp state.  If device was already configured
 400  * as requested or no __nfp_eth_set_*() operations were made no NSP command
 401  * will be performed.
 402  *
 403  * Return:
 404  * 0 - configuration successful;
 405  * 1 - no changes were needed;
 406  * -ERRNO - configuration failed.
 407  */
 408 int
 409 nfp_eth_config_commit_end(struct nfp_nsp *nsp)
 410 {
 411         union eth_table_entry *entries = nfp_nsp_config_entries(nsp);
 412         int ret = 1;
 413
 414         if (nfp_nsp_config_modified(nsp)) {
 415                 ret = nfp_nsp_write_eth_table(nsp, entries, NSP_ETH_TABLE_SIZE);
 416                 ret = ret < 0 ? ret : 0;
 417         }
 418
 419         nfp_eth_config_cleanup_end(nsp);
 420
 421         return ret;
 422 }
 423
 424 /*
 425  * nfp_eth_set_mod_enable() - set PHY module enable control bit
 426  * @cpp:        NFP CPP handle
 427  * @idx:        NFP chip-wide port index
 428  * @enable:     Desired state
 429  *
 430  * Enable or disable PHY module (this usually means setting the TX lanes
 431  * disable bits).
 432  *
 433  * Return:
 434  * 0 - configuration successful;
 435  * 1 - no changes were needed;
 436  * -ERRNO - configuration failed.
 437  */
 438 int
 439 nfp_eth_set_mod_enable(struct nfp_cpp *cpp, unsigned int idx, int enable)
 440 {
 441         union eth_table_entry *entries;
 442         struct nfp_nsp *nsp;
 443         uint64_t reg;
 444
 445         nsp = nfp_eth_config_start(cpp, idx);
 446         if (!nsp)
 447                 return -1;
 448
 449         entries = nfp_nsp_config_entries(nsp);
 450
 451         /* Check if we are already in requested state */
 452         reg = rte_le_to_cpu_64(entries[idx].state);
 453         if (enable != (int)FIELD_GET(NSP_ETH_CTRL_ENABLED, reg)) {
 454                 reg = rte_le_to_cpu_64(entries[idx].control);
 455                 reg &= ~NSP_ETH_CTRL_ENABLED;
 456                 reg |= FIELD_PREP(NSP_ETH_CTRL_ENABLED, enable);
 457                 entries[idx].control = rte_cpu_to_le_64(reg);
 458
 459                 nfp_nsp_config_set_modified(nsp, 1);
 460         }
 461
 462         return nfp_eth_config_commit_end(nsp);
 463 }
 464
 465 /*
 466  * nfp_eth_set_configured() - set PHY module configured control bit
 467  * @cpp:        NFP CPP handle
 468  * @idx:        NFP chip-wide port index
 469  * @configed:   Desired state
 470  *
 471  * Set the ifup/ifdown state on the PHY.
 472  *
 473  * Return:
 474  * 0 - configuration successful;
 475  * 1 - no changes were needed;
 476  * -ERRNO - configuration failed.
 477  */
 478 int
 479 nfp_eth_set_configured(struct nfp_cpp *cpp, unsigned int idx, int configed)
 480 {
 481         union eth_table_entry *entries;
 482         struct nfp_nsp *nsp;
 483         uint64_t reg;
 484
 485         nsp = nfp_eth_config_start(cpp, idx);
 486         if (!nsp)
 487                 return -EIO;
 488
 489         /*
 490          * Older ABI versions did support this feature, however this has only
 491          * been reliable since ABI 20.
 492          */
 493         if (nfp_nsp_get_abi_ver_minor(nsp) < 20) {
 494                 nfp_eth_config_cleanup_end(nsp);
 495                 return -EOPNOTSUPP;
 496         }
 497
 498         entries = nfp_nsp_config_entries(nsp);
 499
 500         /* Check if we are already in requested state */
 501         reg = rte_le_to_cpu_64(entries[idx].state);
 502         if (configed != (int)FIELD_GET(NSP_ETH_STATE_CONFIGURED, reg)) {
 503                 reg = rte_le_to_cpu_64(entries[idx].control);
 504                 reg &= ~NSP_ETH_CTRL_CONFIGURED;
 505                 reg |= FIELD_PREP(NSP_ETH_CTRL_CONFIGURED, configed);
 506                 entries[idx].control = rte_cpu_to_le_64(reg);
 507
 508                 nfp_nsp_config_set_modified(nsp, 1);
 509         }
 510
 511         return nfp_eth_config_commit_end(nsp);
 512 }
 513
 514 static int
 515 nfp_eth_set_bit_config(struct nfp_nsp *nsp, unsigned int raw_idx,
 516                        const uint64_t mask, const unsigned int shift,
 517                        unsigned int val, const uint64_t ctrl_bit)
 518 {
 519         union eth_table_entry *entries = nfp_nsp_config_entries(nsp);
 520         unsigned int idx = nfp_nsp_config_idx(nsp);
 521         uint64_t reg;
 522
 523         /*
 524          * Note: set features were added in ABI 0.14 but the error
 525          *       codes were initially not populated correctly.
 526          */
 527         if (nfp_nsp_get_abi_ver_minor(nsp) < 17) {
 528                 printf("set operations not supported, please update flash\n");
 529                 return -EOPNOTSUPP;
 530         }
 531
 532         /* Check if we are already in requested state */
 533         reg = rte_le_to_cpu_64(entries[idx].raw[raw_idx]);
 534         if (val == (reg & mask) >> shift)
 535                 return 0;
 536
 537         reg &= ~mask;
 538         reg |= (val << shift) & mask;
 539         entries[idx].raw[raw_idx] = rte_cpu_to_le_64(reg);
 540
 541         entries[idx].control |= rte_cpu_to_le_64(ctrl_bit);
 542
 543         nfp_nsp_config_set_modified(nsp, 1);
 544
 545         return 0;
 546 }
 547
 548 #define NFP_ETH_SET_BIT_CONFIG(nsp, raw_idx, mask, val, ctrl_bit)       \
 549         (__extension__ ({ \
 550                 typeof(mask) _x = (mask); \
 551                 nfp_eth_set_bit_config(nsp, raw_idx, _x, __bf_shf(_x), \
 552                                        val, ctrl_bit);                  \
 553         }))
 554
 555 /*
 556  * __nfp_eth_set_aneg() - set PHY autonegotiation control bit
 557  * @nsp:        NFP NSP handle returned from nfp_eth_config_start()
 558  * @mode:       Desired autonegotiation mode
 559  *
 560  * Allow/disallow PHY module to advertise/perform autonegotiation.
 561  * Will write to hwinfo overrides in the flash (persistent config).
 562  *
 563  * Return: 0 or -ERRNO.
 564  */
 565 int
 566 __nfp_eth_set_aneg(struct nfp_nsp *nsp, enum nfp_eth_aneg mode)
 567 {
 568         return NFP_ETH_SET_BIT_CONFIG(nsp, NSP_ETH_RAW_STATE,
 569                                       NSP_ETH_STATE_ANEG, mode,
 570                                       NSP_ETH_CTRL_SET_ANEG);
 571 }
 572
 573 /*
 574  * __nfp_eth_set_fec() - set PHY forward error correction control bit
 575  * @nsp:        NFP NSP handle returned from nfp_eth_config_start()
 576  * @mode:       Desired fec mode
 577  *
 578  * Set the PHY module forward error correction mode.
 579  * Will write to hwinfo overrides in the flash (persistent config).
 580  *
 581  * Return: 0 or -ERRNO.
 582  */
 583 static int
 584 __nfp_eth_set_fec(struct nfp_nsp *nsp, enum nfp_eth_fec mode)
 585 {
 586         return NFP_ETH_SET_BIT_CONFIG(nsp, NSP_ETH_RAW_STATE,
 587                                       NSP_ETH_STATE_FEC, mode,
 588                                       NSP_ETH_CTRL_SET_FEC);
 589 }
 590
 591 /*
 592  * nfp_eth_set_fec() - set PHY forward error correction control mode
 593  * @cpp:        NFP CPP handle
 594  * @idx:        NFP chip-wide port index
 595  * @mode:       Desired fec mode
 596  *
 597  * Return:
 598  * 0 - configuration successful;
 599  * 1 - no changes were needed;
 600  * -ERRNO - configuration failed.
 601  */
 602 int
 603 nfp_eth_set_fec(struct nfp_cpp *cpp, unsigned int idx, enum nfp_eth_fec mode)
 604 {
 605         struct nfp_nsp *nsp;
 606         int err;
 607
 608         nsp = nfp_eth_config_start(cpp, idx);
 609         if (!nsp)
 610                 return -EIO;
 611
 612         err = __nfp_eth_set_fec(nsp, mode);
 613         if (err) {
 614                 nfp_eth_config_cleanup_end(nsp);
 615                 return err;
 616         }
 617
 618         return nfp_eth_config_commit_end(nsp);
 619 }
 620
 621 /*
 622  * __nfp_eth_set_speed() - set interface speed/rate
 623  * @nsp:        NFP NSP handle returned from nfp_eth_config_start()
 624  * @speed:      Desired speed (per lane)
 625  *
 626  * Set lane speed.  Provided @speed value should be subport speed divided
 627  * by number of lanes this subport is spanning (i.e. 10000 for 40G, 25000 for
 628  * 50G, etc.)
 629  * Will write to hwinfo overrides in the flash (persistent config).
 630  *
 631  * Return: 0 or -ERRNO.
 632  */
 633 int
 634 __nfp_eth_set_speed(struct nfp_nsp *nsp, unsigned int speed)
 635 {
 636         enum nfp_eth_rate rate;
 637
 638         rate = nfp_eth_speed2rate(speed);
 639         if (rate == RATE_INVALID) {
 640                 printf("could not find matching lane rate for speed %u\n",
 641                          speed);
 642                 return -EINVAL;
 643         }
 644
 645         return NFP_ETH_SET_BIT_CONFIG(nsp, NSP_ETH_RAW_STATE,
 646                                       NSP_ETH_STATE_RATE, rate,
 647                                       NSP_ETH_CTRL_SET_RATE);
 648 }
 649
 650 /*
 651  * __nfp_eth_set_split() - set interface lane split
 652  * @nsp:        NFP NSP handle returned from nfp_eth_config_start()
 653  * @lanes:      Desired lanes per port
 654  *
 655  * Set number of lanes in the port.
 656  * Will write to hwinfo overrides in the flash (persistent config).
 657  *
 658  * Return: 0 or -ERRNO.
 659  */
 660 int
 661 __nfp_eth_set_split(struct nfp_nsp *nsp, unsigned int lanes)
 662 {
 663         return NFP_ETH_SET_BIT_CONFIG(nsp, NSP_ETH_RAW_PORT, NSP_ETH_PORT_LANES,
 664                                       lanes, NSP_ETH_CTRL_SET_LANES);
 665 }