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.h" 14 #include "mcdi_pcol.h" 15 #include "nic.h" 16 #include "selftest.h" 17 #include "mcdi_port_common.h" 18 19 static int efx_mcdi_mdio_read(struct net_device *net_dev, 20 int prtad, int devad, u16 addr) 21 { 22 struct efx_nic *efx = netdev_priv(net_dev); 23 MCDI_DECLARE_BUF(inbuf, MC_CMD_MDIO_READ_IN_LEN); 24 MCDI_DECLARE_BUF(outbuf, MC_CMD_MDIO_READ_OUT_LEN); 25 size_t outlen; 26 int rc; 27 28 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_BUS, efx->mdio_bus); 29 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_PRTAD, prtad); 30 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_DEVAD, devad); 31 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_ADDR, addr); 32 33 rc = efx_mcdi_rpc(efx, MC_CMD_MDIO_READ, inbuf, sizeof(inbuf), 34 outbuf, sizeof(outbuf), &outlen); 35 if (rc) 36 return rc; 37 38 if (MCDI_DWORD(outbuf, MDIO_READ_OUT_STATUS) != 39 MC_CMD_MDIO_STATUS_GOOD) 40 return -EIO; 41 42 return (u16)MCDI_DWORD(outbuf, MDIO_READ_OUT_VALUE); 43 } 44 45 static int efx_mcdi_mdio_write(struct net_device *net_dev, 46 int prtad, int devad, u16 addr, u16 value) 47 { 48 struct efx_nic *efx = netdev_priv(net_dev); 49 MCDI_DECLARE_BUF(inbuf, MC_CMD_MDIO_WRITE_IN_LEN); 50 MCDI_DECLARE_BUF(outbuf, MC_CMD_MDIO_WRITE_OUT_LEN); 51 size_t outlen; 52 int rc; 53 54 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_BUS, efx->mdio_bus); 55 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_PRTAD, prtad); 56 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_DEVAD, devad); 57 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_ADDR, addr); 58 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_VALUE, value); 59 60 rc = efx_mcdi_rpc(efx, MC_CMD_MDIO_WRITE, inbuf, sizeof(inbuf), 61 outbuf, sizeof(outbuf), &outlen); 62 if (rc) 63 return rc; 64 65 if (MCDI_DWORD(outbuf, MDIO_WRITE_OUT_STATUS) != 66 MC_CMD_MDIO_STATUS_GOOD) 67 return -EIO; 68 69 return 0; 70 } 71 72 static int efx_mcdi_phy_probe(struct efx_nic *efx) 73 { 74 struct efx_mcdi_phy_data *phy_data; 75 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN); 76 u32 caps; 77 int rc; 78 79 /* Initialise and populate phy_data */ 80 phy_data = kzalloc(sizeof(*phy_data), GFP_KERNEL); 81 if (phy_data == NULL) 82 return -ENOMEM; 83 84 rc = efx_mcdi_get_phy_cfg(efx, phy_data); 85 if (rc != 0) 86 goto fail; 87 88 /* Read initial link advertisement */ 89 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0); 90 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0, 91 outbuf, sizeof(outbuf), NULL); 92 if (rc) 93 goto fail; 94 95 /* Fill out nic state */ 96 efx->phy_data = phy_data; 97 efx->phy_type = phy_data->type; 98 99 efx->mdio_bus = phy_data->channel; 100 efx->mdio.prtad = phy_data->port; 101 efx->mdio.mmds = phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22); 102 efx->mdio.mode_support = 0; 103 if (phy_data->mmd_mask & (1 << MC_CMD_MMD_CLAUSE22)) 104 efx->mdio.mode_support |= MDIO_SUPPORTS_C22; 105 if (phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22)) 106 efx->mdio.mode_support |= MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22; 107 108 caps = MCDI_DWORD(outbuf, GET_LINK_OUT_CAP); 109 if (caps & (1 << MC_CMD_PHY_CAP_AN_LBN)) 110 mcdi_to_ethtool_linkset(phy_data->media, caps, 111 efx->link_advertising); 112 else 113 phy_data->forced_cap = caps; 114 115 /* Assert that we can map efx -> mcdi loopback modes */ 116 BUILD_BUG_ON(LOOPBACK_NONE != MC_CMD_LOOPBACK_NONE); 117 BUILD_BUG_ON(LOOPBACK_DATA != MC_CMD_LOOPBACK_DATA); 118 BUILD_BUG_ON(LOOPBACK_GMAC != MC_CMD_LOOPBACK_GMAC); 119 BUILD_BUG_ON(LOOPBACK_XGMII != MC_CMD_LOOPBACK_XGMII); 120 BUILD_BUG_ON(LOOPBACK_XGXS != MC_CMD_LOOPBACK_XGXS); 121 BUILD_BUG_ON(LOOPBACK_XAUI != MC_CMD_LOOPBACK_XAUI); 122 BUILD_BUG_ON(LOOPBACK_GMII != MC_CMD_LOOPBACK_GMII); 123 BUILD_BUG_ON(LOOPBACK_SGMII != MC_CMD_LOOPBACK_SGMII); 124 BUILD_BUG_ON(LOOPBACK_XGBR != MC_CMD_LOOPBACK_XGBR); 125 BUILD_BUG_ON(LOOPBACK_XFI != MC_CMD_LOOPBACK_XFI); 126 BUILD_BUG_ON(LOOPBACK_XAUI_FAR != MC_CMD_LOOPBACK_XAUI_FAR); 127 BUILD_BUG_ON(LOOPBACK_GMII_FAR != MC_CMD_LOOPBACK_GMII_FAR); 128 BUILD_BUG_ON(LOOPBACK_SGMII_FAR != MC_CMD_LOOPBACK_SGMII_FAR); 129 BUILD_BUG_ON(LOOPBACK_XFI_FAR != MC_CMD_LOOPBACK_XFI_FAR); 130 BUILD_BUG_ON(LOOPBACK_GPHY != MC_CMD_LOOPBACK_GPHY); 131 BUILD_BUG_ON(LOOPBACK_PHYXS != MC_CMD_LOOPBACK_PHYXS); 132 BUILD_BUG_ON(LOOPBACK_PCS != MC_CMD_LOOPBACK_PCS); 133 BUILD_BUG_ON(LOOPBACK_PMAPMD != MC_CMD_LOOPBACK_PMAPMD); 134 BUILD_BUG_ON(LOOPBACK_XPORT != MC_CMD_LOOPBACK_XPORT); 135 BUILD_BUG_ON(LOOPBACK_XGMII_WS != MC_CMD_LOOPBACK_XGMII_WS); 136 BUILD_BUG_ON(LOOPBACK_XAUI_WS != MC_CMD_LOOPBACK_XAUI_WS); 137 BUILD_BUG_ON(LOOPBACK_XAUI_WS_FAR != MC_CMD_LOOPBACK_XAUI_WS_FAR); 138 BUILD_BUG_ON(LOOPBACK_XAUI_WS_NEAR != MC_CMD_LOOPBACK_XAUI_WS_NEAR); 139 BUILD_BUG_ON(LOOPBACK_GMII_WS != MC_CMD_LOOPBACK_GMII_WS); 140 BUILD_BUG_ON(LOOPBACK_XFI_WS != MC_CMD_LOOPBACK_XFI_WS); 141 BUILD_BUG_ON(LOOPBACK_XFI_WS_FAR != MC_CMD_LOOPBACK_XFI_WS_FAR); 142 BUILD_BUG_ON(LOOPBACK_PHYXS_WS != MC_CMD_LOOPBACK_PHYXS_WS); 143 144 rc = efx_mcdi_loopback_modes(efx, &efx->loopback_modes); 145 if (rc != 0) 146 goto fail; 147 /* The MC indicates that LOOPBACK_NONE is a valid loopback mode, 148 * but by convention we don't */ 149 efx->loopback_modes &= ~(1 << LOOPBACK_NONE); 150 151 /* Set the initial link mode */ 152 efx_mcdi_phy_decode_link( 153 efx, &efx->link_state, 154 MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED), 155 MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS), 156 MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL)); 157 158 /* Record the initial FEC configuration (or nearest approximation 159 * representable in the ethtool configuration space) 160 */ 161 efx->fec_config = mcdi_fec_caps_to_ethtool(caps, 162 efx->link_state.speed == 25000 || 163 efx->link_state.speed == 50000); 164 165 /* Default to Autonegotiated flow control if the PHY supports it */ 166 efx->wanted_fc = EFX_FC_RX | EFX_FC_TX; 167 if (phy_data->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN)) 168 efx->wanted_fc |= EFX_FC_AUTO; 169 efx_link_set_wanted_fc(efx, efx->wanted_fc); 170 171 return 0; 172 173 fail: 174 kfree(phy_data); 175 return rc; 176 } 177 178 int efx_mcdi_port_reconfigure(struct efx_nic *efx) 179 { 180 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 181 u32 caps = (efx->link_advertising[0] ? 182 ethtool_linkset_to_mcdi_cap(efx->link_advertising) : 183 phy_cfg->forced_cap); 184 185 caps |= ethtool_fec_caps_to_mcdi(efx->fec_config); 186 187 return efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx), 188 efx->loopback_mode, 0); 189 } 190 191 static void efx_mcdi_phy_remove(struct efx_nic *efx) 192 { 193 struct efx_mcdi_phy_data *phy_data = efx->phy_data; 194 195 efx->phy_data = NULL; 196 kfree(phy_data); 197 } 198 199 static void efx_mcdi_phy_get_link_ksettings(struct efx_nic *efx, 200 struct ethtool_link_ksettings *cmd) 201 { 202 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 203 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN); 204 int rc; 205 206 cmd->base.speed = efx->link_state.speed; 207 cmd->base.duplex = efx->link_state.fd; 208 cmd->base.port = mcdi_to_ethtool_media(phy_cfg->media); 209 cmd->base.phy_address = phy_cfg->port; 210 cmd->base.autoneg = !!(efx->link_advertising[0] & ADVERTISED_Autoneg); 211 cmd->base.mdio_support = (efx->mdio.mode_support & 212 (MDIO_SUPPORTS_C45 | MDIO_SUPPORTS_C22)); 213 214 mcdi_to_ethtool_linkset(phy_cfg->media, phy_cfg->supported_cap, 215 cmd->link_modes.supported); 216 memcpy(cmd->link_modes.advertising, efx->link_advertising, 217 sizeof(__ETHTOOL_DECLARE_LINK_MODE_MASK())); 218 219 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0); 220 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0, 221 outbuf, sizeof(outbuf), NULL); 222 if (rc) 223 return; 224 mcdi_to_ethtool_linkset(phy_cfg->media, 225 MCDI_DWORD(outbuf, GET_LINK_OUT_LP_CAP), 226 cmd->link_modes.lp_advertising); 227 } 228 229 static int 230 efx_mcdi_phy_set_link_ksettings(struct efx_nic *efx, 231 const struct ethtool_link_ksettings *cmd) 232 { 233 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 234 u32 caps; 235 int rc; 236 237 if (cmd->base.autoneg) { 238 caps = (ethtool_linkset_to_mcdi_cap(cmd->link_modes.advertising) | 239 1 << MC_CMD_PHY_CAP_AN_LBN); 240 } else if (cmd->base.duplex) { 241 switch (cmd->base.speed) { 242 case 10: caps = 1 << MC_CMD_PHY_CAP_10FDX_LBN; break; 243 case 100: caps = 1 << MC_CMD_PHY_CAP_100FDX_LBN; break; 244 case 1000: caps = 1 << MC_CMD_PHY_CAP_1000FDX_LBN; break; 245 case 10000: caps = 1 << MC_CMD_PHY_CAP_10000FDX_LBN; break; 246 case 40000: caps = 1 << MC_CMD_PHY_CAP_40000FDX_LBN; break; 247 case 100000: caps = 1 << MC_CMD_PHY_CAP_100000FDX_LBN; break; 248 case 25000: caps = 1 << MC_CMD_PHY_CAP_25000FDX_LBN; break; 249 case 50000: caps = 1 << MC_CMD_PHY_CAP_50000FDX_LBN; break; 250 default: return -EINVAL; 251 } 252 } else { 253 switch (cmd->base.speed) { 254 case 10: caps = 1 << MC_CMD_PHY_CAP_10HDX_LBN; break; 255 case 100: caps = 1 << MC_CMD_PHY_CAP_100HDX_LBN; break; 256 case 1000: caps = 1 << MC_CMD_PHY_CAP_1000HDX_LBN; break; 257 default: return -EINVAL; 258 } 259 } 260 261 caps |= ethtool_fec_caps_to_mcdi(efx->fec_config); 262 263 rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx), 264 efx->loopback_mode, 0); 265 if (rc) 266 return rc; 267 268 if (cmd->base.autoneg) { 269 efx_link_set_advertising(efx, cmd->link_modes.advertising); 270 phy_cfg->forced_cap = 0; 271 } else { 272 efx_link_clear_advertising(efx); 273 phy_cfg->forced_cap = caps; 274 } 275 return 0; 276 } 277 278 static int efx_mcdi_phy_set_fecparam(struct efx_nic *efx, 279 const struct ethtool_fecparam *fec) 280 { 281 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 282 u32 caps; 283 int rc; 284 285 /* Work out what efx_mcdi_phy_set_link_ksettings() would produce from 286 * saved advertising bits 287 */ 288 if (test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, efx->link_advertising)) 289 caps = (ethtool_linkset_to_mcdi_cap(efx->link_advertising) | 290 1 << MC_CMD_PHY_CAP_AN_LBN); 291 else 292 caps = phy_cfg->forced_cap; 293 294 caps |= ethtool_fec_caps_to_mcdi(fec->fec); 295 rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx), 296 efx->loopback_mode, 0); 297 if (rc) 298 return rc; 299 300 /* Record the new FEC setting for subsequent set_link calls */ 301 efx->fec_config = fec->fec; 302 return 0; 303 } 304 305 static const char *const mcdi_sft9001_cable_diag_names[] = { 306 "cable.pairA.length", 307 "cable.pairB.length", 308 "cable.pairC.length", 309 "cable.pairD.length", 310 "cable.pairA.status", 311 "cable.pairB.status", 312 "cable.pairC.status", 313 "cable.pairD.status", 314 }; 315 316 static int efx_mcdi_bist(struct efx_nic *efx, unsigned int bist_mode, 317 int *results) 318 { 319 unsigned int retry, i, count = 0; 320 size_t outlen; 321 u32 status; 322 MCDI_DECLARE_BUF(inbuf, MC_CMD_START_BIST_IN_LEN); 323 MCDI_DECLARE_BUF(outbuf, MC_CMD_POLL_BIST_OUT_SFT9001_LEN); 324 u8 *ptr; 325 int rc; 326 327 BUILD_BUG_ON(MC_CMD_START_BIST_OUT_LEN != 0); 328 MCDI_SET_DWORD(inbuf, START_BIST_IN_TYPE, bist_mode); 329 rc = efx_mcdi_rpc(efx, MC_CMD_START_BIST, 330 inbuf, MC_CMD_START_BIST_IN_LEN, NULL, 0, NULL); 331 if (rc) 332 goto out; 333 334 /* Wait up to 10s for BIST to finish */ 335 for (retry = 0; retry < 100; ++retry) { 336 BUILD_BUG_ON(MC_CMD_POLL_BIST_IN_LEN != 0); 337 rc = efx_mcdi_rpc(efx, MC_CMD_POLL_BIST, NULL, 0, 338 outbuf, sizeof(outbuf), &outlen); 339 if (rc) 340 goto out; 341 342 status = MCDI_DWORD(outbuf, POLL_BIST_OUT_RESULT); 343 if (status != MC_CMD_POLL_BIST_RUNNING) 344 goto finished; 345 346 msleep(100); 347 } 348 349 rc = -ETIMEDOUT; 350 goto out; 351 352 finished: 353 results[count++] = (status == MC_CMD_POLL_BIST_PASSED) ? 1 : -1; 354 355 /* SFT9001 specific cable diagnostics output */ 356 if (efx->phy_type == PHY_TYPE_SFT9001B && 357 (bist_mode == MC_CMD_PHY_BIST_CABLE_SHORT || 358 bist_mode == MC_CMD_PHY_BIST_CABLE_LONG)) { 359 ptr = MCDI_PTR(outbuf, POLL_BIST_OUT_SFT9001_CABLE_LENGTH_A); 360 if (status == MC_CMD_POLL_BIST_PASSED && 361 outlen >= MC_CMD_POLL_BIST_OUT_SFT9001_LEN) { 362 for (i = 0; i < 8; i++) { 363 results[count + i] = 364 EFX_DWORD_FIELD(((efx_dword_t *)ptr)[i], 365 EFX_DWORD_0); 366 } 367 } 368 count += 8; 369 } 370 rc = count; 371 372 out: 373 return rc; 374 } 375 376 static int efx_mcdi_phy_run_tests(struct efx_nic *efx, int *results, 377 unsigned flags) 378 { 379 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 380 u32 mode; 381 int rc; 382 383 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) { 384 rc = efx_mcdi_bist(efx, MC_CMD_PHY_BIST, results); 385 if (rc < 0) 386 return rc; 387 388 results += rc; 389 } 390 391 /* If we support both LONG and SHORT, then run each in response to 392 * break or not. Otherwise, run the one we support */ 393 mode = 0; 394 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN)) { 395 if ((flags & ETH_TEST_FL_OFFLINE) && 396 (phy_cfg->flags & 397 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))) 398 mode = MC_CMD_PHY_BIST_CABLE_LONG; 399 else 400 mode = MC_CMD_PHY_BIST_CABLE_SHORT; 401 } else if (phy_cfg->flags & 402 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN)) 403 mode = MC_CMD_PHY_BIST_CABLE_LONG; 404 405 if (mode != 0) { 406 rc = efx_mcdi_bist(efx, mode, results); 407 if (rc < 0) 408 return rc; 409 results += rc; 410 } 411 412 return 0; 413 } 414 415 static const char *efx_mcdi_phy_test_name(struct efx_nic *efx, 416 unsigned int index) 417 { 418 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 419 420 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) { 421 if (index == 0) 422 return "bist"; 423 --index; 424 } 425 426 if (phy_cfg->flags & ((1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN) | 427 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))) { 428 if (index == 0) 429 return "cable"; 430 --index; 431 432 if (efx->phy_type == PHY_TYPE_SFT9001B) { 433 if (index < ARRAY_SIZE(mcdi_sft9001_cable_diag_names)) 434 return mcdi_sft9001_cable_diag_names[index]; 435 index -= ARRAY_SIZE(mcdi_sft9001_cable_diag_names); 436 } 437 } 438 439 return NULL; 440 } 441 442 #define SFP_PAGE_SIZE 128 443 #define SFF_DIAG_TYPE_OFFSET 92 444 #define SFF_DIAG_ADDR_CHANGE BIT(2) 445 #define SFF_8079_NUM_PAGES 2 446 #define SFF_8472_NUM_PAGES 4 447 #define SFF_8436_NUM_PAGES 5 448 #define SFF_DMT_LEVEL_OFFSET 94 449 450 /** efx_mcdi_phy_get_module_eeprom_page() - Get a single page of module eeprom 451 * @efx: NIC context 452 * @page: EEPROM page number 453 * @data: Destination data pointer 454 * @offset: Offset in page to copy from in to data 455 * @space: Space available in data 456 * 457 * Return: 458 * >=0 - amount of data copied 459 * <0 - error 460 */ 461 static int efx_mcdi_phy_get_module_eeprom_page(struct efx_nic *efx, 462 unsigned int page, 463 u8 *data, ssize_t offset, 464 ssize_t space) 465 { 466 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMAX); 467 MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_PHY_MEDIA_INFO_IN_LEN); 468 size_t outlen; 469 unsigned int payload_len; 470 unsigned int to_copy; 471 int rc; 472 473 if (offset > SFP_PAGE_SIZE) 474 return -EINVAL; 475 476 to_copy = min(space, SFP_PAGE_SIZE - offset); 477 478 MCDI_SET_DWORD(inbuf, GET_PHY_MEDIA_INFO_IN_PAGE, page); 479 rc = efx_mcdi_rpc_quiet(efx, MC_CMD_GET_PHY_MEDIA_INFO, 480 inbuf, sizeof(inbuf), 481 outbuf, sizeof(outbuf), 482 &outlen); 483 484 if (rc) 485 return rc; 486 487 if (outlen < (MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_OFST + 488 SFP_PAGE_SIZE)) 489 return -EIO; 490 491 payload_len = MCDI_DWORD(outbuf, GET_PHY_MEDIA_INFO_OUT_DATALEN); 492 if (payload_len != SFP_PAGE_SIZE) 493 return -EIO; 494 495 memcpy(data, MCDI_PTR(outbuf, GET_PHY_MEDIA_INFO_OUT_DATA) + offset, 496 to_copy); 497 498 return to_copy; 499 } 500 501 static int efx_mcdi_phy_get_module_eeprom_byte(struct efx_nic *efx, 502 unsigned int page, 503 u8 byte) 504 { 505 int rc; 506 u8 data; 507 508 rc = efx_mcdi_phy_get_module_eeprom_page(efx, page, &data, byte, 1); 509 if (rc == 1) 510 return data; 511 512 return rc; 513 } 514 515 static int efx_mcdi_phy_diag_type(struct efx_nic *efx) 516 { 517 /* Page zero of the EEPROM includes the diagnostic type at byte 92. */ 518 return efx_mcdi_phy_get_module_eeprom_byte(efx, 0, 519 SFF_DIAG_TYPE_OFFSET); 520 } 521 522 static int efx_mcdi_phy_sff_8472_level(struct efx_nic *efx) 523 { 524 /* Page zero of the EEPROM includes the DMT level at byte 94. */ 525 return efx_mcdi_phy_get_module_eeprom_byte(efx, 0, 526 SFF_DMT_LEVEL_OFFSET); 527 } 528 529 static u32 efx_mcdi_phy_module_type(struct efx_nic *efx) 530 { 531 struct efx_mcdi_phy_data *phy_data = efx->phy_data; 532 533 if (phy_data->media != MC_CMD_MEDIA_QSFP_PLUS) 534 return phy_data->media; 535 536 /* A QSFP+ NIC may actually have an SFP+ module attached. 537 * The ID is page 0, byte 0. 538 */ 539 switch (efx_mcdi_phy_get_module_eeprom_byte(efx, 0, 0)) { 540 case 0x3: 541 return MC_CMD_MEDIA_SFP_PLUS; 542 case 0xc: 543 case 0xd: 544 return MC_CMD_MEDIA_QSFP_PLUS; 545 default: 546 return 0; 547 } 548 } 549 550 static int efx_mcdi_phy_get_module_eeprom(struct efx_nic *efx, 551 struct ethtool_eeprom *ee, u8 *data) 552 { 553 int rc; 554 ssize_t space_remaining = ee->len; 555 unsigned int page_off; 556 bool ignore_missing; 557 int num_pages; 558 int page; 559 560 switch (efx_mcdi_phy_module_type(efx)) { 561 case MC_CMD_MEDIA_SFP_PLUS: 562 num_pages = efx_mcdi_phy_sff_8472_level(efx) > 0 ? 563 SFF_8472_NUM_PAGES : SFF_8079_NUM_PAGES; 564 page = 0; 565 ignore_missing = false; 566 break; 567 case MC_CMD_MEDIA_QSFP_PLUS: 568 num_pages = SFF_8436_NUM_PAGES; 569 page = -1; /* We obtain the lower page by asking for -1. */ 570 ignore_missing = true; /* Ignore missing pages after page 0. */ 571 break; 572 default: 573 return -EOPNOTSUPP; 574 } 575 576 page_off = ee->offset % SFP_PAGE_SIZE; 577 page += ee->offset / SFP_PAGE_SIZE; 578 579 while (space_remaining && (page < num_pages)) { 580 rc = efx_mcdi_phy_get_module_eeprom_page(efx, page, 581 data, page_off, 582 space_remaining); 583 584 if (rc > 0) { 585 space_remaining -= rc; 586 data += rc; 587 page_off = 0; 588 page++; 589 } else if (rc == 0) { 590 space_remaining = 0; 591 } else if (ignore_missing && (page > 0)) { 592 int intended_size = SFP_PAGE_SIZE - page_off; 593 594 space_remaining -= intended_size; 595 if (space_remaining < 0) { 596 space_remaining = 0; 597 } else { 598 memset(data, 0, intended_size); 599 data += intended_size; 600 page_off = 0; 601 page++; 602 rc = 0; 603 } 604 } else { 605 return rc; 606 } 607 } 608 609 return 0; 610 } 611 612 static int efx_mcdi_phy_get_module_info(struct efx_nic *efx, 613 struct ethtool_modinfo *modinfo) 614 { 615 int sff_8472_level; 616 int diag_type; 617 618 switch (efx_mcdi_phy_module_type(efx)) { 619 case MC_CMD_MEDIA_SFP_PLUS: 620 sff_8472_level = efx_mcdi_phy_sff_8472_level(efx); 621 622 /* If we can't read the diagnostics level we have none. */ 623 if (sff_8472_level < 0) 624 return -EOPNOTSUPP; 625 626 /* Check if this module requires the (unsupported) address 627 * change operation. 628 */ 629 diag_type = efx_mcdi_phy_diag_type(efx); 630 631 if ((sff_8472_level == 0) || 632 (diag_type & SFF_DIAG_ADDR_CHANGE)) { 633 modinfo->type = ETH_MODULE_SFF_8079; 634 modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 635 } else { 636 modinfo->type = ETH_MODULE_SFF_8472; 637 modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 638 } 639 break; 640 641 case MC_CMD_MEDIA_QSFP_PLUS: 642 modinfo->type = ETH_MODULE_SFF_8436; 643 modinfo->eeprom_len = ETH_MODULE_SFF_8436_LEN; 644 break; 645 646 default: 647 return -EOPNOTSUPP; 648 } 649 650 return 0; 651 } 652 653 static const struct efx_phy_operations efx_mcdi_phy_ops = { 654 .probe = efx_mcdi_phy_probe, 655 .init = efx_port_dummy_op_int, 656 .reconfigure = efx_mcdi_port_reconfigure, 657 .poll = efx_mcdi_phy_poll, 658 .fini = efx_port_dummy_op_void, 659 .remove = efx_mcdi_phy_remove, 660 .get_link_ksettings = efx_mcdi_phy_get_link_ksettings, 661 .set_link_ksettings = efx_mcdi_phy_set_link_ksettings, 662 .get_fecparam = efx_mcdi_phy_get_fecparam, 663 .set_fecparam = efx_mcdi_phy_set_fecparam, 664 .test_alive = efx_mcdi_phy_test_alive, 665 .run_tests = efx_mcdi_phy_run_tests, 666 .test_name = efx_mcdi_phy_test_name, 667 .get_module_eeprom = efx_mcdi_phy_get_module_eeprom, 668 .get_module_info = efx_mcdi_phy_get_module_info, 669 }; 670 671 u32 efx_mcdi_phy_get_caps(struct efx_nic *efx) 672 { 673 struct efx_mcdi_phy_data *phy_data = efx->phy_data; 674 675 return phy_data->supported_cap; 676 } 677 678 bool efx_mcdi_mac_check_fault(struct efx_nic *efx) 679 { 680 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN); 681 size_t outlength; 682 int rc; 683 684 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0); 685 686 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0, 687 outbuf, sizeof(outbuf), &outlength); 688 if (rc) 689 return true; 690 691 return MCDI_DWORD(outbuf, GET_LINK_OUT_MAC_FAULT) != 0; 692 } 693 694 enum efx_stats_action { 695 EFX_STATS_ENABLE, 696 EFX_STATS_DISABLE, 697 EFX_STATS_PULL, 698 }; 699 700 static int efx_mcdi_mac_stats(struct efx_nic *efx, 701 enum efx_stats_action action, int clear) 702 { 703 MCDI_DECLARE_BUF(inbuf, MC_CMD_MAC_STATS_IN_LEN); 704 int rc; 705 int change = action == EFX_STATS_PULL ? 0 : 1; 706 int enable = action == EFX_STATS_ENABLE ? 1 : 0; 707 int period = action == EFX_STATS_ENABLE ? 1000 : 0; 708 dma_addr_t dma_addr = efx->stats_buffer.dma_addr; 709 u32 dma_len = action != EFX_STATS_DISABLE ? 710 efx->num_mac_stats * sizeof(u64) : 0; 711 712 BUILD_BUG_ON(MC_CMD_MAC_STATS_OUT_DMA_LEN != 0); 713 714 MCDI_SET_QWORD(inbuf, MAC_STATS_IN_DMA_ADDR, dma_addr); 715 MCDI_POPULATE_DWORD_7(inbuf, MAC_STATS_IN_CMD, 716 MAC_STATS_IN_DMA, !!enable, 717 MAC_STATS_IN_CLEAR, clear, 718 MAC_STATS_IN_PERIODIC_CHANGE, change, 719 MAC_STATS_IN_PERIODIC_ENABLE, enable, 720 MAC_STATS_IN_PERIODIC_CLEAR, 0, 721 MAC_STATS_IN_PERIODIC_NOEVENT, 1, 722 MAC_STATS_IN_PERIOD_MS, period); 723 MCDI_SET_DWORD(inbuf, MAC_STATS_IN_DMA_LEN, dma_len); 724 725 if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) 726 MCDI_SET_DWORD(inbuf, MAC_STATS_IN_PORT_ID, efx->vport_id); 727 728 rc = efx_mcdi_rpc_quiet(efx, MC_CMD_MAC_STATS, inbuf, sizeof(inbuf), 729 NULL, 0, NULL); 730 /* Expect ENOENT if DMA queues have not been set up */ 731 if (rc && (rc != -ENOENT || atomic_read(&efx->active_queues))) 732 efx_mcdi_display_error(efx, MC_CMD_MAC_STATS, sizeof(inbuf), 733 NULL, 0, rc); 734 return rc; 735 } 736 737 void efx_mcdi_mac_start_stats(struct efx_nic *efx) 738 { 739 __le64 *dma_stats = efx->stats_buffer.addr; 740 741 dma_stats[efx->num_mac_stats - 1] = EFX_MC_STATS_GENERATION_INVALID; 742 743 efx_mcdi_mac_stats(efx, EFX_STATS_ENABLE, 0); 744 } 745 746 void efx_mcdi_mac_stop_stats(struct efx_nic *efx) 747 { 748 efx_mcdi_mac_stats(efx, EFX_STATS_DISABLE, 0); 749 } 750 751 #define EFX_MAC_STATS_WAIT_US 100 752 #define EFX_MAC_STATS_WAIT_ATTEMPTS 10 753 754 void efx_mcdi_mac_pull_stats(struct efx_nic *efx) 755 { 756 __le64 *dma_stats = efx->stats_buffer.addr; 757 int attempts = EFX_MAC_STATS_WAIT_ATTEMPTS; 758 759 dma_stats[efx->num_mac_stats - 1] = EFX_MC_STATS_GENERATION_INVALID; 760 efx_mcdi_mac_stats(efx, EFX_STATS_PULL, 0); 761 762 while (dma_stats[efx->num_mac_stats - 1] == 763 EFX_MC_STATS_GENERATION_INVALID && 764 attempts-- != 0) 765 udelay(EFX_MAC_STATS_WAIT_US); 766 } 767 768 int efx_mcdi_port_probe(struct efx_nic *efx) 769 { 770 int rc; 771 772 /* Hook in PHY operations table */ 773 efx->phy_op = &efx_mcdi_phy_ops; 774 775 /* Set up MDIO structure for PHY */ 776 efx->mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22; 777 efx->mdio.mdio_read = efx_mcdi_mdio_read; 778 efx->mdio.mdio_write = efx_mcdi_mdio_write; 779 780 /* Fill out MDIO structure, loopback modes, and initial link state */ 781 rc = efx->phy_op->probe(efx); 782 if (rc != 0) 783 return rc; 784 785 /* Allocate buffer for stats */ 786 rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer, 787 efx->num_mac_stats * sizeof(u64), GFP_KERNEL); 788 if (rc) 789 return rc; 790 netif_dbg(efx, probe, efx->net_dev, 791 "stats buffer at %llx (virt %p phys %llx)\n", 792 (u64)efx->stats_buffer.dma_addr, 793 efx->stats_buffer.addr, 794 (u64)virt_to_phys(efx->stats_buffer.addr)); 795 796 efx_mcdi_mac_stats(efx, EFX_STATS_DISABLE, 1); 797 798 return 0; 799 } 800 801 void efx_mcdi_port_remove(struct efx_nic *efx) 802 { 803 efx->phy_op->remove(efx); 804 efx_nic_free_buffer(efx, &efx->stats_buffer); 805 } 806