1 // SPDX-License-Identifier: GPL-2.0-only 2 /**************************************************************************** 3 * Driver for Solarflare network controllers and boards 4 * Copyright 2009-2013 Solarflare Communications Inc. 5 */ 6 7 /* 8 * Driver for PHY related operations via MCDI. 9 */ 10 11 #include <linux/slab.h> 12 #include "efx.h" 13 #include "mcdi_port.h" 14 #include "mcdi.h" 15 #include "mcdi_pcol.h" 16 #include "nic.h" 17 #include "selftest.h" 18 #include "mcdi_port_common.h" 19 20 static int efx_mcdi_mdio_read(struct net_device *net_dev, 21 int prtad, int devad, u16 addr) 22 { 23 struct efx_nic *efx = netdev_priv(net_dev); 24 MCDI_DECLARE_BUF(inbuf, MC_CMD_MDIO_READ_IN_LEN); 25 MCDI_DECLARE_BUF(outbuf, MC_CMD_MDIO_READ_OUT_LEN); 26 size_t outlen; 27 int rc; 28 29 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_BUS, efx->mdio_bus); 30 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_PRTAD, prtad); 31 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_DEVAD, devad); 32 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_ADDR, addr); 33 34 rc = efx_mcdi_rpc(efx, MC_CMD_MDIO_READ, inbuf, sizeof(inbuf), 35 outbuf, sizeof(outbuf), &outlen); 36 if (rc) 37 return rc; 38 39 if (MCDI_DWORD(outbuf, MDIO_READ_OUT_STATUS) != 40 MC_CMD_MDIO_STATUS_GOOD) 41 return -EIO; 42 43 return (u16)MCDI_DWORD(outbuf, MDIO_READ_OUT_VALUE); 44 } 45 46 static int efx_mcdi_mdio_write(struct net_device *net_dev, 47 int prtad, int devad, u16 addr, u16 value) 48 { 49 struct efx_nic *efx = netdev_priv(net_dev); 50 MCDI_DECLARE_BUF(inbuf, MC_CMD_MDIO_WRITE_IN_LEN); 51 MCDI_DECLARE_BUF(outbuf, MC_CMD_MDIO_WRITE_OUT_LEN); 52 size_t outlen; 53 int rc; 54 55 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_BUS, efx->mdio_bus); 56 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_PRTAD, prtad); 57 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_DEVAD, devad); 58 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_ADDR, addr); 59 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_VALUE, value); 60 61 rc = efx_mcdi_rpc(efx, MC_CMD_MDIO_WRITE, inbuf, sizeof(inbuf), 62 outbuf, sizeof(outbuf), &outlen); 63 if (rc) 64 return rc; 65 66 if (MCDI_DWORD(outbuf, MDIO_WRITE_OUT_STATUS) != 67 MC_CMD_MDIO_STATUS_GOOD) 68 return -EIO; 69 70 return 0; 71 } 72 73 static int efx_mcdi_phy_probe(struct efx_nic *efx) 74 { 75 struct efx_mcdi_phy_data *phy_data; 76 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN); 77 u32 caps; 78 int rc; 79 80 /* Initialise and populate phy_data */ 81 phy_data = kzalloc(sizeof(*phy_data), GFP_KERNEL); 82 if (phy_data == NULL) 83 return -ENOMEM; 84 85 rc = efx_mcdi_get_phy_cfg(efx, phy_data); 86 if (rc != 0) 87 goto fail; 88 89 /* Read initial link advertisement */ 90 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0); 91 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0, 92 outbuf, sizeof(outbuf), NULL); 93 if (rc) 94 goto fail; 95 96 /* Fill out nic state */ 97 efx->phy_data = phy_data; 98 efx->phy_type = phy_data->type; 99 100 efx->mdio_bus = phy_data->channel; 101 efx->mdio.prtad = phy_data->port; 102 efx->mdio.mmds = phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22); 103 efx->mdio.mode_support = 0; 104 if (phy_data->mmd_mask & (1 << MC_CMD_MMD_CLAUSE22)) 105 efx->mdio.mode_support |= MDIO_SUPPORTS_C22; 106 if (phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22)) 107 efx->mdio.mode_support |= MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22; 108 109 caps = MCDI_DWORD(outbuf, GET_LINK_OUT_CAP); 110 if (caps & (1 << MC_CMD_PHY_CAP_AN_LBN)) 111 mcdi_to_ethtool_linkset(phy_data->media, caps, 112 efx->link_advertising); 113 else 114 phy_data->forced_cap = caps; 115 116 /* Assert that we can map efx -> mcdi loopback modes */ 117 BUILD_BUG_ON(LOOPBACK_NONE != MC_CMD_LOOPBACK_NONE); 118 BUILD_BUG_ON(LOOPBACK_DATA != MC_CMD_LOOPBACK_DATA); 119 BUILD_BUG_ON(LOOPBACK_GMAC != MC_CMD_LOOPBACK_GMAC); 120 BUILD_BUG_ON(LOOPBACK_XGMII != MC_CMD_LOOPBACK_XGMII); 121 BUILD_BUG_ON(LOOPBACK_XGXS != MC_CMD_LOOPBACK_XGXS); 122 BUILD_BUG_ON(LOOPBACK_XAUI != MC_CMD_LOOPBACK_XAUI); 123 BUILD_BUG_ON(LOOPBACK_GMII != MC_CMD_LOOPBACK_GMII); 124 BUILD_BUG_ON(LOOPBACK_SGMII != MC_CMD_LOOPBACK_SGMII); 125 BUILD_BUG_ON(LOOPBACK_XGBR != MC_CMD_LOOPBACK_XGBR); 126 BUILD_BUG_ON(LOOPBACK_XFI != MC_CMD_LOOPBACK_XFI); 127 BUILD_BUG_ON(LOOPBACK_XAUI_FAR != MC_CMD_LOOPBACK_XAUI_FAR); 128 BUILD_BUG_ON(LOOPBACK_GMII_FAR != MC_CMD_LOOPBACK_GMII_FAR); 129 BUILD_BUG_ON(LOOPBACK_SGMII_FAR != MC_CMD_LOOPBACK_SGMII_FAR); 130 BUILD_BUG_ON(LOOPBACK_XFI_FAR != MC_CMD_LOOPBACK_XFI_FAR); 131 BUILD_BUG_ON(LOOPBACK_GPHY != MC_CMD_LOOPBACK_GPHY); 132 BUILD_BUG_ON(LOOPBACK_PHYXS != MC_CMD_LOOPBACK_PHYXS); 133 BUILD_BUG_ON(LOOPBACK_PCS != MC_CMD_LOOPBACK_PCS); 134 BUILD_BUG_ON(LOOPBACK_PMAPMD != MC_CMD_LOOPBACK_PMAPMD); 135 BUILD_BUG_ON(LOOPBACK_XPORT != MC_CMD_LOOPBACK_XPORT); 136 BUILD_BUG_ON(LOOPBACK_XGMII_WS != MC_CMD_LOOPBACK_XGMII_WS); 137 BUILD_BUG_ON(LOOPBACK_XAUI_WS != MC_CMD_LOOPBACK_XAUI_WS); 138 BUILD_BUG_ON(LOOPBACK_XAUI_WS_FAR != MC_CMD_LOOPBACK_XAUI_WS_FAR); 139 BUILD_BUG_ON(LOOPBACK_XAUI_WS_NEAR != MC_CMD_LOOPBACK_XAUI_WS_NEAR); 140 BUILD_BUG_ON(LOOPBACK_GMII_WS != MC_CMD_LOOPBACK_GMII_WS); 141 BUILD_BUG_ON(LOOPBACK_XFI_WS != MC_CMD_LOOPBACK_XFI_WS); 142 BUILD_BUG_ON(LOOPBACK_XFI_WS_FAR != MC_CMD_LOOPBACK_XFI_WS_FAR); 143 BUILD_BUG_ON(LOOPBACK_PHYXS_WS != MC_CMD_LOOPBACK_PHYXS_WS); 144 145 rc = efx_mcdi_loopback_modes(efx, &efx->loopback_modes); 146 if (rc != 0) 147 goto fail; 148 /* The MC indicates that LOOPBACK_NONE is a valid loopback mode, 149 * but by convention we don't */ 150 efx->loopback_modes &= ~(1 << LOOPBACK_NONE); 151 152 /* Set the initial link mode */ 153 efx_mcdi_phy_decode_link( 154 efx, &efx->link_state, 155 MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED), 156 MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS), 157 MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL)); 158 159 /* Record the initial FEC configuration (or nearest approximation 160 * representable in the ethtool configuration space) 161 */ 162 efx->fec_config = mcdi_fec_caps_to_ethtool(caps, 163 efx->link_state.speed == 25000 || 164 efx->link_state.speed == 50000); 165 166 /* Default to Autonegotiated flow control if the PHY supports it */ 167 efx->wanted_fc = EFX_FC_RX | EFX_FC_TX; 168 if (phy_data->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN)) 169 efx->wanted_fc |= EFX_FC_AUTO; 170 efx_link_set_wanted_fc(efx, efx->wanted_fc); 171 172 return 0; 173 174 fail: 175 kfree(phy_data); 176 return rc; 177 } 178 179 static void efx_mcdi_phy_remove(struct efx_nic *efx) 180 { 181 struct efx_mcdi_phy_data *phy_data = efx->phy_data; 182 183 efx->phy_data = NULL; 184 kfree(phy_data); 185 } 186 187 static void efx_mcdi_phy_get_link_ksettings(struct efx_nic *efx, 188 struct ethtool_link_ksettings *cmd) 189 { 190 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 191 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN); 192 int rc; 193 194 cmd->base.speed = efx->link_state.speed; 195 cmd->base.duplex = efx->link_state.fd; 196 cmd->base.port = mcdi_to_ethtool_media(phy_cfg->media); 197 cmd->base.phy_address = phy_cfg->port; 198 cmd->base.autoneg = !!(efx->link_advertising[0] & ADVERTISED_Autoneg); 199 cmd->base.mdio_support = (efx->mdio.mode_support & 200 (MDIO_SUPPORTS_C45 | MDIO_SUPPORTS_C22)); 201 202 mcdi_to_ethtool_linkset(phy_cfg->media, phy_cfg->supported_cap, 203 cmd->link_modes.supported); 204 memcpy(cmd->link_modes.advertising, efx->link_advertising, 205 sizeof(__ETHTOOL_DECLARE_LINK_MODE_MASK())); 206 207 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0); 208 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0, 209 outbuf, sizeof(outbuf), NULL); 210 if (rc) 211 return; 212 mcdi_to_ethtool_linkset(phy_cfg->media, 213 MCDI_DWORD(outbuf, GET_LINK_OUT_LP_CAP), 214 cmd->link_modes.lp_advertising); 215 } 216 217 static int 218 efx_mcdi_phy_set_link_ksettings(struct efx_nic *efx, 219 const struct ethtool_link_ksettings *cmd) 220 { 221 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 222 u32 caps; 223 int rc; 224 225 if (cmd->base.autoneg) { 226 caps = (ethtool_linkset_to_mcdi_cap(cmd->link_modes.advertising) | 227 1 << MC_CMD_PHY_CAP_AN_LBN); 228 } else if (cmd->base.duplex) { 229 switch (cmd->base.speed) { 230 case 10: caps = 1 << MC_CMD_PHY_CAP_10FDX_LBN; break; 231 case 100: caps = 1 << MC_CMD_PHY_CAP_100FDX_LBN; break; 232 case 1000: caps = 1 << MC_CMD_PHY_CAP_1000FDX_LBN; break; 233 case 10000: caps = 1 << MC_CMD_PHY_CAP_10000FDX_LBN; break; 234 case 40000: caps = 1 << MC_CMD_PHY_CAP_40000FDX_LBN; break; 235 case 100000: caps = 1 << MC_CMD_PHY_CAP_100000FDX_LBN; break; 236 case 25000: caps = 1 << MC_CMD_PHY_CAP_25000FDX_LBN; break; 237 case 50000: caps = 1 << MC_CMD_PHY_CAP_50000FDX_LBN; break; 238 default: return -EINVAL; 239 } 240 } else { 241 switch (cmd->base.speed) { 242 case 10: caps = 1 << MC_CMD_PHY_CAP_10HDX_LBN; break; 243 case 100: caps = 1 << MC_CMD_PHY_CAP_100HDX_LBN; break; 244 case 1000: caps = 1 << MC_CMD_PHY_CAP_1000HDX_LBN; break; 245 default: return -EINVAL; 246 } 247 } 248 249 caps |= ethtool_fec_caps_to_mcdi(efx->fec_config); 250 251 rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx), 252 efx->loopback_mode, 0); 253 if (rc) 254 return rc; 255 256 if (cmd->base.autoneg) { 257 efx_link_set_advertising(efx, cmd->link_modes.advertising); 258 phy_cfg->forced_cap = 0; 259 } else { 260 efx_link_clear_advertising(efx); 261 phy_cfg->forced_cap = caps; 262 } 263 return 0; 264 } 265 266 static int efx_mcdi_phy_set_fecparam(struct efx_nic *efx, 267 const struct ethtool_fecparam *fec) 268 { 269 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 270 u32 caps; 271 int rc; 272 273 /* Work out what efx_mcdi_phy_set_link_ksettings() would produce from 274 * saved advertising bits 275 */ 276 if (test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, efx->link_advertising)) 277 caps = (ethtool_linkset_to_mcdi_cap(efx->link_advertising) | 278 1 << MC_CMD_PHY_CAP_AN_LBN); 279 else 280 caps = phy_cfg->forced_cap; 281 282 caps |= ethtool_fec_caps_to_mcdi(fec->fec); 283 rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx), 284 efx->loopback_mode, 0); 285 if (rc) 286 return rc; 287 288 /* Record the new FEC setting for subsequent set_link calls */ 289 efx->fec_config = fec->fec; 290 return 0; 291 } 292 293 static const char *const mcdi_sft9001_cable_diag_names[] = { 294 "cable.pairA.length", 295 "cable.pairB.length", 296 "cable.pairC.length", 297 "cable.pairD.length", 298 "cable.pairA.status", 299 "cable.pairB.status", 300 "cable.pairC.status", 301 "cable.pairD.status", 302 }; 303 304 static int efx_mcdi_bist(struct efx_nic *efx, unsigned int bist_mode, 305 int *results) 306 { 307 unsigned int retry, i, count = 0; 308 size_t outlen; 309 u32 status; 310 MCDI_DECLARE_BUF(inbuf, MC_CMD_START_BIST_IN_LEN); 311 MCDI_DECLARE_BUF(outbuf, MC_CMD_POLL_BIST_OUT_SFT9001_LEN); 312 u8 *ptr; 313 int rc; 314 315 BUILD_BUG_ON(MC_CMD_START_BIST_OUT_LEN != 0); 316 MCDI_SET_DWORD(inbuf, START_BIST_IN_TYPE, bist_mode); 317 rc = efx_mcdi_rpc(efx, MC_CMD_START_BIST, 318 inbuf, MC_CMD_START_BIST_IN_LEN, NULL, 0, NULL); 319 if (rc) 320 goto out; 321 322 /* Wait up to 10s for BIST to finish */ 323 for (retry = 0; retry < 100; ++retry) { 324 BUILD_BUG_ON(MC_CMD_POLL_BIST_IN_LEN != 0); 325 rc = efx_mcdi_rpc(efx, MC_CMD_POLL_BIST, NULL, 0, 326 outbuf, sizeof(outbuf), &outlen); 327 if (rc) 328 goto out; 329 330 status = MCDI_DWORD(outbuf, POLL_BIST_OUT_RESULT); 331 if (status != MC_CMD_POLL_BIST_RUNNING) 332 goto finished; 333 334 msleep(100); 335 } 336 337 rc = -ETIMEDOUT; 338 goto out; 339 340 finished: 341 results[count++] = (status == MC_CMD_POLL_BIST_PASSED) ? 1 : -1; 342 343 /* SFT9001 specific cable diagnostics output */ 344 if (efx->phy_type == PHY_TYPE_SFT9001B && 345 (bist_mode == MC_CMD_PHY_BIST_CABLE_SHORT || 346 bist_mode == MC_CMD_PHY_BIST_CABLE_LONG)) { 347 ptr = MCDI_PTR(outbuf, POLL_BIST_OUT_SFT9001_CABLE_LENGTH_A); 348 if (status == MC_CMD_POLL_BIST_PASSED && 349 outlen >= MC_CMD_POLL_BIST_OUT_SFT9001_LEN) { 350 for (i = 0; i < 8; i++) { 351 results[count + i] = 352 EFX_DWORD_FIELD(((efx_dword_t *)ptr)[i], 353 EFX_DWORD_0); 354 } 355 } 356 count += 8; 357 } 358 rc = count; 359 360 out: 361 return rc; 362 } 363 364 static int efx_mcdi_phy_run_tests(struct efx_nic *efx, int *results, 365 unsigned flags) 366 { 367 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 368 u32 mode; 369 int rc; 370 371 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) { 372 rc = efx_mcdi_bist(efx, MC_CMD_PHY_BIST, results); 373 if (rc < 0) 374 return rc; 375 376 results += rc; 377 } 378 379 /* If we support both LONG and SHORT, then run each in response to 380 * break or not. Otherwise, run the one we support */ 381 mode = 0; 382 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN)) { 383 if ((flags & ETH_TEST_FL_OFFLINE) && 384 (phy_cfg->flags & 385 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))) 386 mode = MC_CMD_PHY_BIST_CABLE_LONG; 387 else 388 mode = MC_CMD_PHY_BIST_CABLE_SHORT; 389 } else if (phy_cfg->flags & 390 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN)) 391 mode = MC_CMD_PHY_BIST_CABLE_LONG; 392 393 if (mode != 0) { 394 rc = efx_mcdi_bist(efx, mode, results); 395 if (rc < 0) 396 return rc; 397 results += rc; 398 } 399 400 return 0; 401 } 402 403 static const char *efx_mcdi_phy_test_name(struct efx_nic *efx, 404 unsigned int index) 405 { 406 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 407 408 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) { 409 if (index == 0) 410 return "bist"; 411 --index; 412 } 413 414 if (phy_cfg->flags & ((1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN) | 415 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))) { 416 if (index == 0) 417 return "cable"; 418 --index; 419 420 if (efx->phy_type == PHY_TYPE_SFT9001B) { 421 if (index < ARRAY_SIZE(mcdi_sft9001_cable_diag_names)) 422 return mcdi_sft9001_cable_diag_names[index]; 423 index -= ARRAY_SIZE(mcdi_sft9001_cable_diag_names); 424 } 425 } 426 427 return NULL; 428 } 429 430 #define SFP_PAGE_SIZE 128 431 #define SFF_DIAG_TYPE_OFFSET 92 432 #define SFF_DIAG_ADDR_CHANGE BIT(2) 433 #define SFF_8079_NUM_PAGES 2 434 #define SFF_8472_NUM_PAGES 4 435 #define SFF_8436_NUM_PAGES 5 436 #define SFF_DMT_LEVEL_OFFSET 94 437 438 /** efx_mcdi_phy_get_module_eeprom_page() - Get a single page of module eeprom 439 * @efx: NIC context 440 * @page: EEPROM page number 441 * @data: Destination data pointer 442 * @offset: Offset in page to copy from in to data 443 * @space: Space available in data 444 * 445 * Return: 446 * >=0 - amount of data copied 447 * <0 - error 448 */ 449 static int efx_mcdi_phy_get_module_eeprom_page(struct efx_nic *efx, 450 unsigned int page, 451 u8 *data, ssize_t offset, 452 ssize_t space) 453 { 454 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMAX); 455 MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_PHY_MEDIA_INFO_IN_LEN); 456 size_t outlen; 457 unsigned int payload_len; 458 unsigned int to_copy; 459 int rc; 460 461 if (offset > SFP_PAGE_SIZE) 462 return -EINVAL; 463 464 to_copy = min(space, SFP_PAGE_SIZE - offset); 465 466 MCDI_SET_DWORD(inbuf, GET_PHY_MEDIA_INFO_IN_PAGE, page); 467 rc = efx_mcdi_rpc_quiet(efx, MC_CMD_GET_PHY_MEDIA_INFO, 468 inbuf, sizeof(inbuf), 469 outbuf, sizeof(outbuf), 470 &outlen); 471 472 if (rc) 473 return rc; 474 475 if (outlen < (MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_OFST + 476 SFP_PAGE_SIZE)) 477 return -EIO; 478 479 payload_len = MCDI_DWORD(outbuf, GET_PHY_MEDIA_INFO_OUT_DATALEN); 480 if (payload_len != SFP_PAGE_SIZE) 481 return -EIO; 482 483 memcpy(data, MCDI_PTR(outbuf, GET_PHY_MEDIA_INFO_OUT_DATA) + offset, 484 to_copy); 485 486 return to_copy; 487 } 488 489 static int efx_mcdi_phy_get_module_eeprom_byte(struct efx_nic *efx, 490 unsigned int page, 491 u8 byte) 492 { 493 int rc; 494 u8 data; 495 496 rc = efx_mcdi_phy_get_module_eeprom_page(efx, page, &data, byte, 1); 497 if (rc == 1) 498 return data; 499 500 return rc; 501 } 502 503 static int efx_mcdi_phy_diag_type(struct efx_nic *efx) 504 { 505 /* Page zero of the EEPROM includes the diagnostic type at byte 92. */ 506 return efx_mcdi_phy_get_module_eeprom_byte(efx, 0, 507 SFF_DIAG_TYPE_OFFSET); 508 } 509 510 static int efx_mcdi_phy_sff_8472_level(struct efx_nic *efx) 511 { 512 /* Page zero of the EEPROM includes the DMT level at byte 94. */ 513 return efx_mcdi_phy_get_module_eeprom_byte(efx, 0, 514 SFF_DMT_LEVEL_OFFSET); 515 } 516 517 static u32 efx_mcdi_phy_module_type(struct efx_nic *efx) 518 { 519 struct efx_mcdi_phy_data *phy_data = efx->phy_data; 520 521 if (phy_data->media != MC_CMD_MEDIA_QSFP_PLUS) 522 return phy_data->media; 523 524 /* A QSFP+ NIC may actually have an SFP+ module attached. 525 * The ID is page 0, byte 0. 526 */ 527 switch (efx_mcdi_phy_get_module_eeprom_byte(efx, 0, 0)) { 528 case 0x3: 529 return MC_CMD_MEDIA_SFP_PLUS; 530 case 0xc: 531 case 0xd: 532 return MC_CMD_MEDIA_QSFP_PLUS; 533 default: 534 return 0; 535 } 536 } 537 538 static int efx_mcdi_phy_get_module_eeprom(struct efx_nic *efx, 539 struct ethtool_eeprom *ee, u8 *data) 540 { 541 int rc; 542 ssize_t space_remaining = ee->len; 543 unsigned int page_off; 544 bool ignore_missing; 545 int num_pages; 546 int page; 547 548 switch (efx_mcdi_phy_module_type(efx)) { 549 case MC_CMD_MEDIA_SFP_PLUS: 550 num_pages = efx_mcdi_phy_sff_8472_level(efx) > 0 ? 551 SFF_8472_NUM_PAGES : SFF_8079_NUM_PAGES; 552 page = 0; 553 ignore_missing = false; 554 break; 555 case MC_CMD_MEDIA_QSFP_PLUS: 556 num_pages = SFF_8436_NUM_PAGES; 557 page = -1; /* We obtain the lower page by asking for -1. */ 558 ignore_missing = true; /* Ignore missing pages after page 0. */ 559 break; 560 default: 561 return -EOPNOTSUPP; 562 } 563 564 page_off = ee->offset % SFP_PAGE_SIZE; 565 page += ee->offset / SFP_PAGE_SIZE; 566 567 while (space_remaining && (page < num_pages)) { 568 rc = efx_mcdi_phy_get_module_eeprom_page(efx, page, 569 data, page_off, 570 space_remaining); 571 572 if (rc > 0) { 573 space_remaining -= rc; 574 data += rc; 575 page_off = 0; 576 page++; 577 } else if (rc == 0) { 578 space_remaining = 0; 579 } else if (ignore_missing && (page > 0)) { 580 int intended_size = SFP_PAGE_SIZE - page_off; 581 582 space_remaining -= intended_size; 583 if (space_remaining < 0) { 584 space_remaining = 0; 585 } else { 586 memset(data, 0, intended_size); 587 data += intended_size; 588 page_off = 0; 589 page++; 590 rc = 0; 591 } 592 } else { 593 return rc; 594 } 595 } 596 597 return 0; 598 } 599 600 static int efx_mcdi_phy_get_module_info(struct efx_nic *efx, 601 struct ethtool_modinfo *modinfo) 602 { 603 int sff_8472_level; 604 int diag_type; 605 606 switch (efx_mcdi_phy_module_type(efx)) { 607 case MC_CMD_MEDIA_SFP_PLUS: 608 sff_8472_level = efx_mcdi_phy_sff_8472_level(efx); 609 610 /* If we can't read the diagnostics level we have none. */ 611 if (sff_8472_level < 0) 612 return -EOPNOTSUPP; 613 614 /* Check if this module requires the (unsupported) address 615 * change operation. 616 */ 617 diag_type = efx_mcdi_phy_diag_type(efx); 618 619 if ((sff_8472_level == 0) || 620 (diag_type & SFF_DIAG_ADDR_CHANGE)) { 621 modinfo->type = ETH_MODULE_SFF_8079; 622 modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 623 } else { 624 modinfo->type = ETH_MODULE_SFF_8472; 625 modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 626 } 627 break; 628 629 case MC_CMD_MEDIA_QSFP_PLUS: 630 modinfo->type = ETH_MODULE_SFF_8436; 631 modinfo->eeprom_len = ETH_MODULE_SFF_8436_LEN; 632 break; 633 634 default: 635 return -EOPNOTSUPP; 636 } 637 638 return 0; 639 } 640 641 static const struct efx_phy_operations efx_mcdi_phy_ops = { 642 .probe = efx_mcdi_phy_probe, 643 .init = efx_port_dummy_op_int, 644 .reconfigure = efx_mcdi_port_reconfigure, 645 .poll = efx_mcdi_phy_poll, 646 .fini = efx_port_dummy_op_void, 647 .remove = efx_mcdi_phy_remove, 648 .get_link_ksettings = efx_mcdi_phy_get_link_ksettings, 649 .set_link_ksettings = efx_mcdi_phy_set_link_ksettings, 650 .get_fecparam = efx_mcdi_phy_get_fecparam, 651 .set_fecparam = efx_mcdi_phy_set_fecparam, 652 .test_alive = efx_mcdi_phy_test_alive, 653 .run_tests = efx_mcdi_phy_run_tests, 654 .test_name = efx_mcdi_phy_test_name, 655 .get_module_eeprom = efx_mcdi_phy_get_module_eeprom, 656 .get_module_info = efx_mcdi_phy_get_module_info, 657 }; 658 659 u32 efx_mcdi_phy_get_caps(struct efx_nic *efx) 660 { 661 struct efx_mcdi_phy_data *phy_data = efx->phy_data; 662 663 return phy_data->supported_cap; 664 } 665 666 bool efx_mcdi_mac_check_fault(struct efx_nic *efx) 667 { 668 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN); 669 size_t outlength; 670 int rc; 671 672 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0); 673 674 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0, 675 outbuf, sizeof(outbuf), &outlength); 676 if (rc) 677 return true; 678 679 return MCDI_DWORD(outbuf, GET_LINK_OUT_MAC_FAULT) != 0; 680 } 681 682 int efx_mcdi_port_probe(struct efx_nic *efx) 683 { 684 int rc; 685 686 /* Hook in PHY operations table */ 687 efx->phy_op = &efx_mcdi_phy_ops; 688 689 /* Set up MDIO structure for PHY */ 690 efx->mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22; 691 efx->mdio.mdio_read = efx_mcdi_mdio_read; 692 efx->mdio.mdio_write = efx_mcdi_mdio_write; 693 694 /* Fill out MDIO structure, loopback modes, and initial link state */ 695 rc = efx->phy_op->probe(efx); 696 if (rc != 0) 697 return rc; 698 699 return efx_mcdi_mac_init_stats(efx); 700 } 701 702 void efx_mcdi_port_remove(struct efx_nic *efx) 703 { 704 efx->phy_op->remove(efx); 705 efx_mcdi_mac_fini_stats(efx); 706 } 707