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 int efx_mcdi_port_reconfigure(struct efx_nic *efx) 180 { 181 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 182 u32 caps = (efx->link_advertising[0] ? 183 ethtool_linkset_to_mcdi_cap(efx->link_advertising) : 184 phy_cfg->forced_cap); 185 186 caps |= ethtool_fec_caps_to_mcdi(efx->fec_config); 187 188 return efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx), 189 efx->loopback_mode, 0); 190 } 191 192 static void efx_mcdi_phy_remove(struct efx_nic *efx) 193 { 194 struct efx_mcdi_phy_data *phy_data = efx->phy_data; 195 196 efx->phy_data = NULL; 197 kfree(phy_data); 198 } 199 200 static void efx_mcdi_phy_get_link_ksettings(struct efx_nic *efx, 201 struct ethtool_link_ksettings *cmd) 202 { 203 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 204 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN); 205 int rc; 206 207 cmd->base.speed = efx->link_state.speed; 208 cmd->base.duplex = efx->link_state.fd; 209 cmd->base.port = mcdi_to_ethtool_media(phy_cfg->media); 210 cmd->base.phy_address = phy_cfg->port; 211 cmd->base.autoneg = !!(efx->link_advertising[0] & ADVERTISED_Autoneg); 212 cmd->base.mdio_support = (efx->mdio.mode_support & 213 (MDIO_SUPPORTS_C45 | MDIO_SUPPORTS_C22)); 214 215 mcdi_to_ethtool_linkset(phy_cfg->media, phy_cfg->supported_cap, 216 cmd->link_modes.supported); 217 memcpy(cmd->link_modes.advertising, efx->link_advertising, 218 sizeof(__ETHTOOL_DECLARE_LINK_MODE_MASK())); 219 220 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0); 221 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0, 222 outbuf, sizeof(outbuf), NULL); 223 if (rc) 224 return; 225 mcdi_to_ethtool_linkset(phy_cfg->media, 226 MCDI_DWORD(outbuf, GET_LINK_OUT_LP_CAP), 227 cmd->link_modes.lp_advertising); 228 } 229 230 static int 231 efx_mcdi_phy_set_link_ksettings(struct efx_nic *efx, 232 const struct ethtool_link_ksettings *cmd) 233 { 234 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 235 u32 caps; 236 int rc; 237 238 if (cmd->base.autoneg) { 239 caps = (ethtool_linkset_to_mcdi_cap(cmd->link_modes.advertising) | 240 1 << MC_CMD_PHY_CAP_AN_LBN); 241 } else if (cmd->base.duplex) { 242 switch (cmd->base.speed) { 243 case 10: caps = 1 << MC_CMD_PHY_CAP_10FDX_LBN; break; 244 case 100: caps = 1 << MC_CMD_PHY_CAP_100FDX_LBN; break; 245 case 1000: caps = 1 << MC_CMD_PHY_CAP_1000FDX_LBN; break; 246 case 10000: caps = 1 << MC_CMD_PHY_CAP_10000FDX_LBN; break; 247 case 40000: caps = 1 << MC_CMD_PHY_CAP_40000FDX_LBN; break; 248 case 100000: caps = 1 << MC_CMD_PHY_CAP_100000FDX_LBN; break; 249 case 25000: caps = 1 << MC_CMD_PHY_CAP_25000FDX_LBN; break; 250 case 50000: caps = 1 << MC_CMD_PHY_CAP_50000FDX_LBN; break; 251 default: return -EINVAL; 252 } 253 } else { 254 switch (cmd->base.speed) { 255 case 10: caps = 1 << MC_CMD_PHY_CAP_10HDX_LBN; break; 256 case 100: caps = 1 << MC_CMD_PHY_CAP_100HDX_LBN; break; 257 case 1000: caps = 1 << MC_CMD_PHY_CAP_1000HDX_LBN; break; 258 default: return -EINVAL; 259 } 260 } 261 262 caps |= ethtool_fec_caps_to_mcdi(efx->fec_config); 263 264 rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx), 265 efx->loopback_mode, 0); 266 if (rc) 267 return rc; 268 269 if (cmd->base.autoneg) { 270 efx_link_set_advertising(efx, cmd->link_modes.advertising); 271 phy_cfg->forced_cap = 0; 272 } else { 273 efx_link_clear_advertising(efx); 274 phy_cfg->forced_cap = caps; 275 } 276 return 0; 277 } 278 279 static int efx_mcdi_phy_set_fecparam(struct efx_nic *efx, 280 const struct ethtool_fecparam *fec) 281 { 282 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 283 u32 caps; 284 int rc; 285 286 /* Work out what efx_mcdi_phy_set_link_ksettings() would produce from 287 * saved advertising bits 288 */ 289 if (test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, efx->link_advertising)) 290 caps = (ethtool_linkset_to_mcdi_cap(efx->link_advertising) | 291 1 << MC_CMD_PHY_CAP_AN_LBN); 292 else 293 caps = phy_cfg->forced_cap; 294 295 caps |= ethtool_fec_caps_to_mcdi(fec->fec); 296 rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx), 297 efx->loopback_mode, 0); 298 if (rc) 299 return rc; 300 301 /* Record the new FEC setting for subsequent set_link calls */ 302 efx->fec_config = fec->fec; 303 return 0; 304 } 305 306 static const char *const mcdi_sft9001_cable_diag_names[] = { 307 "cable.pairA.length", 308 "cable.pairB.length", 309 "cable.pairC.length", 310 "cable.pairD.length", 311 "cable.pairA.status", 312 "cable.pairB.status", 313 "cable.pairC.status", 314 "cable.pairD.status", 315 }; 316 317 static int efx_mcdi_bist(struct efx_nic *efx, unsigned int bist_mode, 318 int *results) 319 { 320 unsigned int retry, i, count = 0; 321 size_t outlen; 322 u32 status; 323 MCDI_DECLARE_BUF(inbuf, MC_CMD_START_BIST_IN_LEN); 324 MCDI_DECLARE_BUF(outbuf, MC_CMD_POLL_BIST_OUT_SFT9001_LEN); 325 u8 *ptr; 326 int rc; 327 328 BUILD_BUG_ON(MC_CMD_START_BIST_OUT_LEN != 0); 329 MCDI_SET_DWORD(inbuf, START_BIST_IN_TYPE, bist_mode); 330 rc = efx_mcdi_rpc(efx, MC_CMD_START_BIST, 331 inbuf, MC_CMD_START_BIST_IN_LEN, NULL, 0, NULL); 332 if (rc) 333 goto out; 334 335 /* Wait up to 10s for BIST to finish */ 336 for (retry = 0; retry < 100; ++retry) { 337 BUILD_BUG_ON(MC_CMD_POLL_BIST_IN_LEN != 0); 338 rc = efx_mcdi_rpc(efx, MC_CMD_POLL_BIST, NULL, 0, 339 outbuf, sizeof(outbuf), &outlen); 340 if (rc) 341 goto out; 342 343 status = MCDI_DWORD(outbuf, POLL_BIST_OUT_RESULT); 344 if (status != MC_CMD_POLL_BIST_RUNNING) 345 goto finished; 346 347 msleep(100); 348 } 349 350 rc = -ETIMEDOUT; 351 goto out; 352 353 finished: 354 results[count++] = (status == MC_CMD_POLL_BIST_PASSED) ? 1 : -1; 355 356 /* SFT9001 specific cable diagnostics output */ 357 if (efx->phy_type == PHY_TYPE_SFT9001B && 358 (bist_mode == MC_CMD_PHY_BIST_CABLE_SHORT || 359 bist_mode == MC_CMD_PHY_BIST_CABLE_LONG)) { 360 ptr = MCDI_PTR(outbuf, POLL_BIST_OUT_SFT9001_CABLE_LENGTH_A); 361 if (status == MC_CMD_POLL_BIST_PASSED && 362 outlen >= MC_CMD_POLL_BIST_OUT_SFT9001_LEN) { 363 for (i = 0; i < 8; i++) { 364 results[count + i] = 365 EFX_DWORD_FIELD(((efx_dword_t *)ptr)[i], 366 EFX_DWORD_0); 367 } 368 } 369 count += 8; 370 } 371 rc = count; 372 373 out: 374 return rc; 375 } 376 377 static int efx_mcdi_phy_run_tests(struct efx_nic *efx, int *results, 378 unsigned flags) 379 { 380 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 381 u32 mode; 382 int rc; 383 384 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) { 385 rc = efx_mcdi_bist(efx, MC_CMD_PHY_BIST, results); 386 if (rc < 0) 387 return rc; 388 389 results += rc; 390 } 391 392 /* If we support both LONG and SHORT, then run each in response to 393 * break or not. Otherwise, run the one we support */ 394 mode = 0; 395 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN)) { 396 if ((flags & ETH_TEST_FL_OFFLINE) && 397 (phy_cfg->flags & 398 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))) 399 mode = MC_CMD_PHY_BIST_CABLE_LONG; 400 else 401 mode = MC_CMD_PHY_BIST_CABLE_SHORT; 402 } else if (phy_cfg->flags & 403 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN)) 404 mode = MC_CMD_PHY_BIST_CABLE_LONG; 405 406 if (mode != 0) { 407 rc = efx_mcdi_bist(efx, mode, results); 408 if (rc < 0) 409 return rc; 410 results += rc; 411 } 412 413 return 0; 414 } 415 416 static const char *efx_mcdi_phy_test_name(struct efx_nic *efx, 417 unsigned int index) 418 { 419 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 420 421 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) { 422 if (index == 0) 423 return "bist"; 424 --index; 425 } 426 427 if (phy_cfg->flags & ((1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN) | 428 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))) { 429 if (index == 0) 430 return "cable"; 431 --index; 432 433 if (efx->phy_type == PHY_TYPE_SFT9001B) { 434 if (index < ARRAY_SIZE(mcdi_sft9001_cable_diag_names)) 435 return mcdi_sft9001_cable_diag_names[index]; 436 index -= ARRAY_SIZE(mcdi_sft9001_cable_diag_names); 437 } 438 } 439 440 return NULL; 441 } 442 443 #define SFP_PAGE_SIZE 128 444 #define SFF_DIAG_TYPE_OFFSET 92 445 #define SFF_DIAG_ADDR_CHANGE BIT(2) 446 #define SFF_8079_NUM_PAGES 2 447 #define SFF_8472_NUM_PAGES 4 448 #define SFF_8436_NUM_PAGES 5 449 #define SFF_DMT_LEVEL_OFFSET 94 450 451 /** efx_mcdi_phy_get_module_eeprom_page() - Get a single page of module eeprom 452 * @efx: NIC context 453 * @page: EEPROM page number 454 * @data: Destination data pointer 455 * @offset: Offset in page to copy from in to data 456 * @space: Space available in data 457 * 458 * Return: 459 * >=0 - amount of data copied 460 * <0 - error 461 */ 462 static int efx_mcdi_phy_get_module_eeprom_page(struct efx_nic *efx, 463 unsigned int page, 464 u8 *data, ssize_t offset, 465 ssize_t space) 466 { 467 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMAX); 468 MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_PHY_MEDIA_INFO_IN_LEN); 469 size_t outlen; 470 unsigned int payload_len; 471 unsigned int to_copy; 472 int rc; 473 474 if (offset > SFP_PAGE_SIZE) 475 return -EINVAL; 476 477 to_copy = min(space, SFP_PAGE_SIZE - offset); 478 479 MCDI_SET_DWORD(inbuf, GET_PHY_MEDIA_INFO_IN_PAGE, page); 480 rc = efx_mcdi_rpc_quiet(efx, MC_CMD_GET_PHY_MEDIA_INFO, 481 inbuf, sizeof(inbuf), 482 outbuf, sizeof(outbuf), 483 &outlen); 484 485 if (rc) 486 return rc; 487 488 if (outlen < (MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_OFST + 489 SFP_PAGE_SIZE)) 490 return -EIO; 491 492 payload_len = MCDI_DWORD(outbuf, GET_PHY_MEDIA_INFO_OUT_DATALEN); 493 if (payload_len != SFP_PAGE_SIZE) 494 return -EIO; 495 496 memcpy(data, MCDI_PTR(outbuf, GET_PHY_MEDIA_INFO_OUT_DATA) + offset, 497 to_copy); 498 499 return to_copy; 500 } 501 502 static int efx_mcdi_phy_get_module_eeprom_byte(struct efx_nic *efx, 503 unsigned int page, 504 u8 byte) 505 { 506 int rc; 507 u8 data; 508 509 rc = efx_mcdi_phy_get_module_eeprom_page(efx, page, &data, byte, 1); 510 if (rc == 1) 511 return data; 512 513 return rc; 514 } 515 516 static int efx_mcdi_phy_diag_type(struct efx_nic *efx) 517 { 518 /* Page zero of the EEPROM includes the diagnostic type at byte 92. */ 519 return efx_mcdi_phy_get_module_eeprom_byte(efx, 0, 520 SFF_DIAG_TYPE_OFFSET); 521 } 522 523 static int efx_mcdi_phy_sff_8472_level(struct efx_nic *efx) 524 { 525 /* Page zero of the EEPROM includes the DMT level at byte 94. */ 526 return efx_mcdi_phy_get_module_eeprom_byte(efx, 0, 527 SFF_DMT_LEVEL_OFFSET); 528 } 529 530 static u32 efx_mcdi_phy_module_type(struct efx_nic *efx) 531 { 532 struct efx_mcdi_phy_data *phy_data = efx->phy_data; 533 534 if (phy_data->media != MC_CMD_MEDIA_QSFP_PLUS) 535 return phy_data->media; 536 537 /* A QSFP+ NIC may actually have an SFP+ module attached. 538 * The ID is page 0, byte 0. 539 */ 540 switch (efx_mcdi_phy_get_module_eeprom_byte(efx, 0, 0)) { 541 case 0x3: 542 return MC_CMD_MEDIA_SFP_PLUS; 543 case 0xc: 544 case 0xd: 545 return MC_CMD_MEDIA_QSFP_PLUS; 546 default: 547 return 0; 548 } 549 } 550 551 static int efx_mcdi_phy_get_module_eeprom(struct efx_nic *efx, 552 struct ethtool_eeprom *ee, u8 *data) 553 { 554 int rc; 555 ssize_t space_remaining = ee->len; 556 unsigned int page_off; 557 bool ignore_missing; 558 int num_pages; 559 int page; 560 561 switch (efx_mcdi_phy_module_type(efx)) { 562 case MC_CMD_MEDIA_SFP_PLUS: 563 num_pages = efx_mcdi_phy_sff_8472_level(efx) > 0 ? 564 SFF_8472_NUM_PAGES : SFF_8079_NUM_PAGES; 565 page = 0; 566 ignore_missing = false; 567 break; 568 case MC_CMD_MEDIA_QSFP_PLUS: 569 num_pages = SFF_8436_NUM_PAGES; 570 page = -1; /* We obtain the lower page by asking for -1. */ 571 ignore_missing = true; /* Ignore missing pages after page 0. */ 572 break; 573 default: 574 return -EOPNOTSUPP; 575 } 576 577 page_off = ee->offset % SFP_PAGE_SIZE; 578 page += ee->offset / SFP_PAGE_SIZE; 579 580 while (space_remaining && (page < num_pages)) { 581 rc = efx_mcdi_phy_get_module_eeprom_page(efx, page, 582 data, page_off, 583 space_remaining); 584 585 if (rc > 0) { 586 space_remaining -= rc; 587 data += rc; 588 page_off = 0; 589 page++; 590 } else if (rc == 0) { 591 space_remaining = 0; 592 } else if (ignore_missing && (page > 0)) { 593 int intended_size = SFP_PAGE_SIZE - page_off; 594 595 space_remaining -= intended_size; 596 if (space_remaining < 0) { 597 space_remaining = 0; 598 } else { 599 memset(data, 0, intended_size); 600 data += intended_size; 601 page_off = 0; 602 page++; 603 rc = 0; 604 } 605 } else { 606 return rc; 607 } 608 } 609 610 return 0; 611 } 612 613 static int efx_mcdi_phy_get_module_info(struct efx_nic *efx, 614 struct ethtool_modinfo *modinfo) 615 { 616 int sff_8472_level; 617 int diag_type; 618 619 switch (efx_mcdi_phy_module_type(efx)) { 620 case MC_CMD_MEDIA_SFP_PLUS: 621 sff_8472_level = efx_mcdi_phy_sff_8472_level(efx); 622 623 /* If we can't read the diagnostics level we have none. */ 624 if (sff_8472_level < 0) 625 return -EOPNOTSUPP; 626 627 /* Check if this module requires the (unsupported) address 628 * change operation. 629 */ 630 diag_type = efx_mcdi_phy_diag_type(efx); 631 632 if ((sff_8472_level == 0) || 633 (diag_type & SFF_DIAG_ADDR_CHANGE)) { 634 modinfo->type = ETH_MODULE_SFF_8079; 635 modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 636 } else { 637 modinfo->type = ETH_MODULE_SFF_8472; 638 modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 639 } 640 break; 641 642 case MC_CMD_MEDIA_QSFP_PLUS: 643 modinfo->type = ETH_MODULE_SFF_8436; 644 modinfo->eeprom_len = ETH_MODULE_SFF_8436_LEN; 645 break; 646 647 default: 648 return -EOPNOTSUPP; 649 } 650 651 return 0; 652 } 653 654 static const struct efx_phy_operations efx_mcdi_phy_ops = { 655 .probe = efx_mcdi_phy_probe, 656 .init = efx_port_dummy_op_int, 657 .reconfigure = efx_mcdi_port_reconfigure, 658 .poll = efx_mcdi_phy_poll, 659 .fini = efx_port_dummy_op_void, 660 .remove = efx_mcdi_phy_remove, 661 .get_link_ksettings = efx_mcdi_phy_get_link_ksettings, 662 .set_link_ksettings = efx_mcdi_phy_set_link_ksettings, 663 .get_fecparam = efx_mcdi_phy_get_fecparam, 664 .set_fecparam = efx_mcdi_phy_set_fecparam, 665 .test_alive = efx_mcdi_phy_test_alive, 666 .run_tests = efx_mcdi_phy_run_tests, 667 .test_name = efx_mcdi_phy_test_name, 668 .get_module_eeprom = efx_mcdi_phy_get_module_eeprom, 669 .get_module_info = efx_mcdi_phy_get_module_info, 670 }; 671 672 u32 efx_mcdi_phy_get_caps(struct efx_nic *efx) 673 { 674 struct efx_mcdi_phy_data *phy_data = efx->phy_data; 675 676 return phy_data->supported_cap; 677 } 678 679 bool efx_mcdi_mac_check_fault(struct efx_nic *efx) 680 { 681 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN); 682 size_t outlength; 683 int rc; 684 685 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0); 686 687 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0, 688 outbuf, sizeof(outbuf), &outlength); 689 if (rc) 690 return true; 691 692 return MCDI_DWORD(outbuf, GET_LINK_OUT_MAC_FAULT) != 0; 693 } 694 695 enum efx_stats_action { 696 EFX_STATS_ENABLE, 697 EFX_STATS_DISABLE, 698 EFX_STATS_PULL, 699 }; 700 701 static int efx_mcdi_mac_stats(struct efx_nic *efx, 702 enum efx_stats_action action, int clear) 703 { 704 MCDI_DECLARE_BUF(inbuf, MC_CMD_MAC_STATS_IN_LEN); 705 int rc; 706 int change = action == EFX_STATS_PULL ? 0 : 1; 707 int enable = action == EFX_STATS_ENABLE ? 1 : 0; 708 int period = action == EFX_STATS_ENABLE ? 1000 : 0; 709 dma_addr_t dma_addr = efx->stats_buffer.dma_addr; 710 u32 dma_len = action != EFX_STATS_DISABLE ? 711 efx->num_mac_stats * sizeof(u64) : 0; 712 713 BUILD_BUG_ON(MC_CMD_MAC_STATS_OUT_DMA_LEN != 0); 714 715 MCDI_SET_QWORD(inbuf, MAC_STATS_IN_DMA_ADDR, dma_addr); 716 MCDI_POPULATE_DWORD_7(inbuf, MAC_STATS_IN_CMD, 717 MAC_STATS_IN_DMA, !!enable, 718 MAC_STATS_IN_CLEAR, clear, 719 MAC_STATS_IN_PERIODIC_CHANGE, change, 720 MAC_STATS_IN_PERIODIC_ENABLE, enable, 721 MAC_STATS_IN_PERIODIC_CLEAR, 0, 722 MAC_STATS_IN_PERIODIC_NOEVENT, 1, 723 MAC_STATS_IN_PERIOD_MS, period); 724 MCDI_SET_DWORD(inbuf, MAC_STATS_IN_DMA_LEN, dma_len); 725 726 if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) 727 MCDI_SET_DWORD(inbuf, MAC_STATS_IN_PORT_ID, efx->vport_id); 728 729 rc = efx_mcdi_rpc_quiet(efx, MC_CMD_MAC_STATS, inbuf, sizeof(inbuf), 730 NULL, 0, NULL); 731 /* Expect ENOENT if DMA queues have not been set up */ 732 if (rc && (rc != -ENOENT || atomic_read(&efx->active_queues))) 733 efx_mcdi_display_error(efx, MC_CMD_MAC_STATS, sizeof(inbuf), 734 NULL, 0, rc); 735 return rc; 736 } 737 738 void efx_mcdi_mac_start_stats(struct efx_nic *efx) 739 { 740 __le64 *dma_stats = efx->stats_buffer.addr; 741 742 dma_stats[efx->num_mac_stats - 1] = EFX_MC_STATS_GENERATION_INVALID; 743 744 efx_mcdi_mac_stats(efx, EFX_STATS_ENABLE, 0); 745 } 746 747 void efx_mcdi_mac_stop_stats(struct efx_nic *efx) 748 { 749 efx_mcdi_mac_stats(efx, EFX_STATS_DISABLE, 0); 750 } 751 752 #define EFX_MAC_STATS_WAIT_US 100 753 #define EFX_MAC_STATS_WAIT_ATTEMPTS 10 754 755 void efx_mcdi_mac_pull_stats(struct efx_nic *efx) 756 { 757 __le64 *dma_stats = efx->stats_buffer.addr; 758 int attempts = EFX_MAC_STATS_WAIT_ATTEMPTS; 759 760 dma_stats[efx->num_mac_stats - 1] = EFX_MC_STATS_GENERATION_INVALID; 761 efx_mcdi_mac_stats(efx, EFX_STATS_PULL, 0); 762 763 while (dma_stats[efx->num_mac_stats - 1] == 764 EFX_MC_STATS_GENERATION_INVALID && 765 attempts-- != 0) 766 udelay(EFX_MAC_STATS_WAIT_US); 767 } 768 769 int efx_mcdi_port_probe(struct efx_nic *efx) 770 { 771 int rc; 772 773 /* Hook in PHY operations table */ 774 efx->phy_op = &efx_mcdi_phy_ops; 775 776 /* Set up MDIO structure for PHY */ 777 efx->mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22; 778 efx->mdio.mdio_read = efx_mcdi_mdio_read; 779 efx->mdio.mdio_write = efx_mcdi_mdio_write; 780 781 /* Fill out MDIO structure, loopback modes, and initial link state */ 782 rc = efx->phy_op->probe(efx); 783 if (rc != 0) 784 return rc; 785 786 /* Allocate buffer for stats */ 787 rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer, 788 efx->num_mac_stats * sizeof(u64), GFP_KERNEL); 789 if (rc) 790 return rc; 791 netif_dbg(efx, probe, efx->net_dev, 792 "stats buffer at %llx (virt %p phys %llx)\n", 793 (u64)efx->stats_buffer.dma_addr, 794 efx->stats_buffer.addr, 795 (u64)virt_to_phys(efx->stats_buffer.addr)); 796 797 efx_mcdi_mac_stats(efx, EFX_STATS_DISABLE, 1); 798 799 return 0; 800 } 801 802 void efx_mcdi_port_remove(struct efx_nic *efx) 803 { 804 efx->phy_op->remove(efx); 805 efx_nic_free_buffer(efx, &efx->stats_buffer); 806 } 807