1 /**************************************************************************** 2 * Driver for Solarflare network controllers and boards 3 * Copyright 2009-2013 Solarflare Communications Inc. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 as published 7 * by the Free Software Foundation, incorporated herein by reference. 8 */ 9 10 /* 11 * Driver for PHY related operations via MCDI. 12 */ 13 14 #include <linux/slab.h> 15 #include "efx.h" 16 #include "phy.h" 17 #include "mcdi.h" 18 #include "mcdi_pcol.h" 19 #include "nic.h" 20 #include "selftest.h" 21 22 struct efx_mcdi_phy_data { 23 u32 flags; 24 u32 type; 25 u32 supported_cap; 26 u32 channel; 27 u32 port; 28 u32 stats_mask; 29 u8 name[20]; 30 u32 media; 31 u32 mmd_mask; 32 u8 revision[20]; 33 u32 forced_cap; 34 }; 35 36 static int 37 efx_mcdi_get_phy_cfg(struct efx_nic *efx, struct efx_mcdi_phy_data *cfg) 38 { 39 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_CFG_OUT_LEN); 40 size_t outlen; 41 int rc; 42 43 BUILD_BUG_ON(MC_CMD_GET_PHY_CFG_IN_LEN != 0); 44 BUILD_BUG_ON(MC_CMD_GET_PHY_CFG_OUT_NAME_LEN != sizeof(cfg->name)); 45 46 rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_CFG, NULL, 0, 47 outbuf, sizeof(outbuf), &outlen); 48 if (rc) 49 goto fail; 50 51 if (outlen < MC_CMD_GET_PHY_CFG_OUT_LEN) { 52 rc = -EIO; 53 goto fail; 54 } 55 56 cfg->flags = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_FLAGS); 57 cfg->type = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_TYPE); 58 cfg->supported_cap = 59 MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_SUPPORTED_CAP); 60 cfg->channel = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_CHANNEL); 61 cfg->port = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_PRT); 62 cfg->stats_mask = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_STATS_MASK); 63 memcpy(cfg->name, MCDI_PTR(outbuf, GET_PHY_CFG_OUT_NAME), 64 sizeof(cfg->name)); 65 cfg->media = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_MEDIA_TYPE); 66 cfg->mmd_mask = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_MMD_MASK); 67 memcpy(cfg->revision, MCDI_PTR(outbuf, GET_PHY_CFG_OUT_REVISION), 68 sizeof(cfg->revision)); 69 70 return 0; 71 72 fail: 73 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc); 74 return rc; 75 } 76 77 static int efx_mcdi_set_link(struct efx_nic *efx, u32 capabilities, 78 u32 flags, u32 loopback_mode, 79 u32 loopback_speed) 80 { 81 MCDI_DECLARE_BUF(inbuf, MC_CMD_SET_LINK_IN_LEN); 82 int rc; 83 84 BUILD_BUG_ON(MC_CMD_SET_LINK_OUT_LEN != 0); 85 86 MCDI_SET_DWORD(inbuf, SET_LINK_IN_CAP, capabilities); 87 MCDI_SET_DWORD(inbuf, SET_LINK_IN_FLAGS, flags); 88 MCDI_SET_DWORD(inbuf, SET_LINK_IN_LOOPBACK_MODE, loopback_mode); 89 MCDI_SET_DWORD(inbuf, SET_LINK_IN_LOOPBACK_SPEED, loopback_speed); 90 91 rc = efx_mcdi_rpc(efx, MC_CMD_SET_LINK, inbuf, sizeof(inbuf), 92 NULL, 0, NULL); 93 if (rc) 94 goto fail; 95 96 return 0; 97 98 fail: 99 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc); 100 return rc; 101 } 102 103 static int efx_mcdi_loopback_modes(struct efx_nic *efx, u64 *loopback_modes) 104 { 105 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LOOPBACK_MODES_OUT_LEN); 106 size_t outlen; 107 int rc; 108 109 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LOOPBACK_MODES, NULL, 0, 110 outbuf, sizeof(outbuf), &outlen); 111 if (rc) 112 goto fail; 113 114 if (outlen < (MC_CMD_GET_LOOPBACK_MODES_OUT_SUGGESTED_OFST + 115 MC_CMD_GET_LOOPBACK_MODES_OUT_SUGGESTED_LEN)) { 116 rc = -EIO; 117 goto fail; 118 } 119 120 *loopback_modes = MCDI_QWORD(outbuf, GET_LOOPBACK_MODES_OUT_SUGGESTED); 121 122 return 0; 123 124 fail: 125 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc); 126 return rc; 127 } 128 129 static int efx_mcdi_mdio_read(struct net_device *net_dev, 130 int prtad, int devad, u16 addr) 131 { 132 struct efx_nic *efx = netdev_priv(net_dev); 133 MCDI_DECLARE_BUF(inbuf, MC_CMD_MDIO_READ_IN_LEN); 134 MCDI_DECLARE_BUF(outbuf, MC_CMD_MDIO_READ_OUT_LEN); 135 size_t outlen; 136 int rc; 137 138 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_BUS, efx->mdio_bus); 139 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_PRTAD, prtad); 140 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_DEVAD, devad); 141 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_ADDR, addr); 142 143 rc = efx_mcdi_rpc(efx, MC_CMD_MDIO_READ, inbuf, sizeof(inbuf), 144 outbuf, sizeof(outbuf), &outlen); 145 if (rc) 146 goto fail; 147 148 if (MCDI_DWORD(outbuf, MDIO_READ_OUT_STATUS) != 149 MC_CMD_MDIO_STATUS_GOOD) 150 return -EIO; 151 152 return (u16)MCDI_DWORD(outbuf, MDIO_READ_OUT_VALUE); 153 154 fail: 155 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc); 156 return rc; 157 } 158 159 static int efx_mcdi_mdio_write(struct net_device *net_dev, 160 int prtad, int devad, u16 addr, u16 value) 161 { 162 struct efx_nic *efx = netdev_priv(net_dev); 163 MCDI_DECLARE_BUF(inbuf, MC_CMD_MDIO_WRITE_IN_LEN); 164 MCDI_DECLARE_BUF(outbuf, MC_CMD_MDIO_WRITE_OUT_LEN); 165 size_t outlen; 166 int rc; 167 168 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_BUS, efx->mdio_bus); 169 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_PRTAD, prtad); 170 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_DEVAD, devad); 171 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_ADDR, addr); 172 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_VALUE, value); 173 174 rc = efx_mcdi_rpc(efx, MC_CMD_MDIO_WRITE, inbuf, sizeof(inbuf), 175 outbuf, sizeof(outbuf), &outlen); 176 if (rc) 177 goto fail; 178 179 if (MCDI_DWORD(outbuf, MDIO_WRITE_OUT_STATUS) != 180 MC_CMD_MDIO_STATUS_GOOD) 181 return -EIO; 182 183 return 0; 184 185 fail: 186 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc); 187 return rc; 188 } 189 190 static u32 mcdi_to_ethtool_cap(u32 media, u32 cap) 191 { 192 u32 result = 0; 193 194 switch (media) { 195 case MC_CMD_MEDIA_KX4: 196 result |= SUPPORTED_Backplane; 197 if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN)) 198 result |= SUPPORTED_1000baseKX_Full; 199 if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN)) 200 result |= SUPPORTED_10000baseKX4_Full; 201 break; 202 203 case MC_CMD_MEDIA_XFP: 204 case MC_CMD_MEDIA_SFP_PLUS: 205 result |= SUPPORTED_FIBRE; 206 break; 207 208 case MC_CMD_MEDIA_BASE_T: 209 result |= SUPPORTED_TP; 210 if (cap & (1 << MC_CMD_PHY_CAP_10HDX_LBN)) 211 result |= SUPPORTED_10baseT_Half; 212 if (cap & (1 << MC_CMD_PHY_CAP_10FDX_LBN)) 213 result |= SUPPORTED_10baseT_Full; 214 if (cap & (1 << MC_CMD_PHY_CAP_100HDX_LBN)) 215 result |= SUPPORTED_100baseT_Half; 216 if (cap & (1 << MC_CMD_PHY_CAP_100FDX_LBN)) 217 result |= SUPPORTED_100baseT_Full; 218 if (cap & (1 << MC_CMD_PHY_CAP_1000HDX_LBN)) 219 result |= SUPPORTED_1000baseT_Half; 220 if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN)) 221 result |= SUPPORTED_1000baseT_Full; 222 if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN)) 223 result |= SUPPORTED_10000baseT_Full; 224 break; 225 } 226 227 if (cap & (1 << MC_CMD_PHY_CAP_PAUSE_LBN)) 228 result |= SUPPORTED_Pause; 229 if (cap & (1 << MC_CMD_PHY_CAP_ASYM_LBN)) 230 result |= SUPPORTED_Asym_Pause; 231 if (cap & (1 << MC_CMD_PHY_CAP_AN_LBN)) 232 result |= SUPPORTED_Autoneg; 233 234 return result; 235 } 236 237 static u32 ethtool_to_mcdi_cap(u32 cap) 238 { 239 u32 result = 0; 240 241 if (cap & SUPPORTED_10baseT_Half) 242 result |= (1 << MC_CMD_PHY_CAP_10HDX_LBN); 243 if (cap & SUPPORTED_10baseT_Full) 244 result |= (1 << MC_CMD_PHY_CAP_10FDX_LBN); 245 if (cap & SUPPORTED_100baseT_Half) 246 result |= (1 << MC_CMD_PHY_CAP_100HDX_LBN); 247 if (cap & SUPPORTED_100baseT_Full) 248 result |= (1 << MC_CMD_PHY_CAP_100FDX_LBN); 249 if (cap & SUPPORTED_1000baseT_Half) 250 result |= (1 << MC_CMD_PHY_CAP_1000HDX_LBN); 251 if (cap & (SUPPORTED_1000baseT_Full | SUPPORTED_1000baseKX_Full)) 252 result |= (1 << MC_CMD_PHY_CAP_1000FDX_LBN); 253 if (cap & (SUPPORTED_10000baseT_Full | SUPPORTED_10000baseKX4_Full)) 254 result |= (1 << MC_CMD_PHY_CAP_10000FDX_LBN); 255 if (cap & SUPPORTED_Pause) 256 result |= (1 << MC_CMD_PHY_CAP_PAUSE_LBN); 257 if (cap & SUPPORTED_Asym_Pause) 258 result |= (1 << MC_CMD_PHY_CAP_ASYM_LBN); 259 if (cap & SUPPORTED_Autoneg) 260 result |= (1 << MC_CMD_PHY_CAP_AN_LBN); 261 262 return result; 263 } 264 265 static u32 efx_get_mcdi_phy_flags(struct efx_nic *efx) 266 { 267 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 268 enum efx_phy_mode mode, supported; 269 u32 flags; 270 271 /* TODO: Advertise the capabilities supported by this PHY */ 272 supported = 0; 273 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_TXDIS_LBN)) 274 supported |= PHY_MODE_TX_DISABLED; 275 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_LOWPOWER_LBN)) 276 supported |= PHY_MODE_LOW_POWER; 277 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_POWEROFF_LBN)) 278 supported |= PHY_MODE_OFF; 279 280 mode = efx->phy_mode & supported; 281 282 flags = 0; 283 if (mode & PHY_MODE_TX_DISABLED) 284 flags |= (1 << MC_CMD_SET_LINK_IN_TXDIS_LBN); 285 if (mode & PHY_MODE_LOW_POWER) 286 flags |= (1 << MC_CMD_SET_LINK_IN_LOWPOWER_LBN); 287 if (mode & PHY_MODE_OFF) 288 flags |= (1 << MC_CMD_SET_LINK_IN_POWEROFF_LBN); 289 290 return flags; 291 } 292 293 static u32 mcdi_to_ethtool_media(u32 media) 294 { 295 switch (media) { 296 case MC_CMD_MEDIA_XAUI: 297 case MC_CMD_MEDIA_CX4: 298 case MC_CMD_MEDIA_KX4: 299 return PORT_OTHER; 300 301 case MC_CMD_MEDIA_XFP: 302 case MC_CMD_MEDIA_SFP_PLUS: 303 return PORT_FIBRE; 304 305 case MC_CMD_MEDIA_BASE_T: 306 return PORT_TP; 307 308 default: 309 return PORT_OTHER; 310 } 311 } 312 313 static void efx_mcdi_phy_decode_link(struct efx_nic *efx, 314 struct efx_link_state *link_state, 315 u32 speed, u32 flags, u32 fcntl) 316 { 317 switch (fcntl) { 318 case MC_CMD_FCNTL_AUTO: 319 WARN_ON(1); /* This is not a link mode */ 320 link_state->fc = EFX_FC_AUTO | EFX_FC_TX | EFX_FC_RX; 321 break; 322 case MC_CMD_FCNTL_BIDIR: 323 link_state->fc = EFX_FC_TX | EFX_FC_RX; 324 break; 325 case MC_CMD_FCNTL_RESPOND: 326 link_state->fc = EFX_FC_RX; 327 break; 328 default: 329 WARN_ON(1); 330 case MC_CMD_FCNTL_OFF: 331 link_state->fc = 0; 332 break; 333 } 334 335 link_state->up = !!(flags & (1 << MC_CMD_GET_LINK_OUT_LINK_UP_LBN)); 336 link_state->fd = !!(flags & (1 << MC_CMD_GET_LINK_OUT_FULL_DUPLEX_LBN)); 337 link_state->speed = speed; 338 } 339 340 static int efx_mcdi_phy_probe(struct efx_nic *efx) 341 { 342 struct efx_mcdi_phy_data *phy_data; 343 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN); 344 u32 caps; 345 int rc; 346 347 /* Initialise and populate phy_data */ 348 phy_data = kzalloc(sizeof(*phy_data), GFP_KERNEL); 349 if (phy_data == NULL) 350 return -ENOMEM; 351 352 rc = efx_mcdi_get_phy_cfg(efx, phy_data); 353 if (rc != 0) 354 goto fail; 355 356 /* Read initial link advertisement */ 357 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0); 358 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0, 359 outbuf, sizeof(outbuf), NULL); 360 if (rc) 361 goto fail; 362 363 /* Fill out nic state */ 364 efx->phy_data = phy_data; 365 efx->phy_type = phy_data->type; 366 367 efx->mdio_bus = phy_data->channel; 368 efx->mdio.prtad = phy_data->port; 369 efx->mdio.mmds = phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22); 370 efx->mdio.mode_support = 0; 371 if (phy_data->mmd_mask & (1 << MC_CMD_MMD_CLAUSE22)) 372 efx->mdio.mode_support |= MDIO_SUPPORTS_C22; 373 if (phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22)) 374 efx->mdio.mode_support |= MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22; 375 376 caps = MCDI_DWORD(outbuf, GET_LINK_OUT_CAP); 377 if (caps & (1 << MC_CMD_PHY_CAP_AN_LBN)) 378 efx->link_advertising = 379 mcdi_to_ethtool_cap(phy_data->media, caps); 380 else 381 phy_data->forced_cap = caps; 382 383 /* Assert that we can map efx -> mcdi loopback modes */ 384 BUILD_BUG_ON(LOOPBACK_NONE != MC_CMD_LOOPBACK_NONE); 385 BUILD_BUG_ON(LOOPBACK_DATA != MC_CMD_LOOPBACK_DATA); 386 BUILD_BUG_ON(LOOPBACK_GMAC != MC_CMD_LOOPBACK_GMAC); 387 BUILD_BUG_ON(LOOPBACK_XGMII != MC_CMD_LOOPBACK_XGMII); 388 BUILD_BUG_ON(LOOPBACK_XGXS != MC_CMD_LOOPBACK_XGXS); 389 BUILD_BUG_ON(LOOPBACK_XAUI != MC_CMD_LOOPBACK_XAUI); 390 BUILD_BUG_ON(LOOPBACK_GMII != MC_CMD_LOOPBACK_GMII); 391 BUILD_BUG_ON(LOOPBACK_SGMII != MC_CMD_LOOPBACK_SGMII); 392 BUILD_BUG_ON(LOOPBACK_XGBR != MC_CMD_LOOPBACK_XGBR); 393 BUILD_BUG_ON(LOOPBACK_XFI != MC_CMD_LOOPBACK_XFI); 394 BUILD_BUG_ON(LOOPBACK_XAUI_FAR != MC_CMD_LOOPBACK_XAUI_FAR); 395 BUILD_BUG_ON(LOOPBACK_GMII_FAR != MC_CMD_LOOPBACK_GMII_FAR); 396 BUILD_BUG_ON(LOOPBACK_SGMII_FAR != MC_CMD_LOOPBACK_SGMII_FAR); 397 BUILD_BUG_ON(LOOPBACK_XFI_FAR != MC_CMD_LOOPBACK_XFI_FAR); 398 BUILD_BUG_ON(LOOPBACK_GPHY != MC_CMD_LOOPBACK_GPHY); 399 BUILD_BUG_ON(LOOPBACK_PHYXS != MC_CMD_LOOPBACK_PHYXS); 400 BUILD_BUG_ON(LOOPBACK_PCS != MC_CMD_LOOPBACK_PCS); 401 BUILD_BUG_ON(LOOPBACK_PMAPMD != MC_CMD_LOOPBACK_PMAPMD); 402 BUILD_BUG_ON(LOOPBACK_XPORT != MC_CMD_LOOPBACK_XPORT); 403 BUILD_BUG_ON(LOOPBACK_XGMII_WS != MC_CMD_LOOPBACK_XGMII_WS); 404 BUILD_BUG_ON(LOOPBACK_XAUI_WS != MC_CMD_LOOPBACK_XAUI_WS); 405 BUILD_BUG_ON(LOOPBACK_XAUI_WS_FAR != MC_CMD_LOOPBACK_XAUI_WS_FAR); 406 BUILD_BUG_ON(LOOPBACK_XAUI_WS_NEAR != MC_CMD_LOOPBACK_XAUI_WS_NEAR); 407 BUILD_BUG_ON(LOOPBACK_GMII_WS != MC_CMD_LOOPBACK_GMII_WS); 408 BUILD_BUG_ON(LOOPBACK_XFI_WS != MC_CMD_LOOPBACK_XFI_WS); 409 BUILD_BUG_ON(LOOPBACK_XFI_WS_FAR != MC_CMD_LOOPBACK_XFI_WS_FAR); 410 BUILD_BUG_ON(LOOPBACK_PHYXS_WS != MC_CMD_LOOPBACK_PHYXS_WS); 411 412 rc = efx_mcdi_loopback_modes(efx, &efx->loopback_modes); 413 if (rc != 0) 414 goto fail; 415 /* The MC indicates that LOOPBACK_NONE is a valid loopback mode, 416 * but by convention we don't */ 417 efx->loopback_modes &= ~(1 << LOOPBACK_NONE); 418 419 /* Set the initial link mode */ 420 efx_mcdi_phy_decode_link( 421 efx, &efx->link_state, 422 MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED), 423 MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS), 424 MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL)); 425 426 /* Default to Autonegotiated flow control if the PHY supports it */ 427 efx->wanted_fc = EFX_FC_RX | EFX_FC_TX; 428 if (phy_data->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN)) 429 efx->wanted_fc |= EFX_FC_AUTO; 430 efx_link_set_wanted_fc(efx, efx->wanted_fc); 431 432 return 0; 433 434 fail: 435 kfree(phy_data); 436 return rc; 437 } 438 439 int efx_mcdi_port_reconfigure(struct efx_nic *efx) 440 { 441 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 442 u32 caps = (efx->link_advertising ? 443 ethtool_to_mcdi_cap(efx->link_advertising) : 444 phy_cfg->forced_cap); 445 446 return efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx), 447 efx->loopback_mode, 0); 448 } 449 450 /* Verify that the forced flow control settings (!EFX_FC_AUTO) are 451 * supported by the link partner. Warn the user if this isn't the case 452 */ 453 static void efx_mcdi_phy_check_fcntl(struct efx_nic *efx, u32 lpa) 454 { 455 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 456 u32 rmtadv; 457 458 /* The link partner capabilities are only relevant if the 459 * link supports flow control autonegotiation */ 460 if (~phy_cfg->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN)) 461 return; 462 463 /* If flow control autoneg is supported and enabled, then fine */ 464 if (efx->wanted_fc & EFX_FC_AUTO) 465 return; 466 467 rmtadv = 0; 468 if (lpa & (1 << MC_CMD_PHY_CAP_PAUSE_LBN)) 469 rmtadv |= ADVERTISED_Pause; 470 if (lpa & (1 << MC_CMD_PHY_CAP_ASYM_LBN)) 471 rmtadv |= ADVERTISED_Asym_Pause; 472 473 if ((efx->wanted_fc & EFX_FC_TX) && rmtadv == ADVERTISED_Asym_Pause) 474 netif_err(efx, link, efx->net_dev, 475 "warning: link partner doesn't support pause frames"); 476 } 477 478 static bool efx_mcdi_phy_poll(struct efx_nic *efx) 479 { 480 struct efx_link_state old_state = efx->link_state; 481 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN); 482 int rc; 483 484 WARN_ON(!mutex_is_locked(&efx->mac_lock)); 485 486 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0); 487 488 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0, 489 outbuf, sizeof(outbuf), NULL); 490 if (rc) { 491 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", 492 __func__, rc); 493 efx->link_state.up = false; 494 } else { 495 efx_mcdi_phy_decode_link( 496 efx, &efx->link_state, 497 MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED), 498 MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS), 499 MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL)); 500 } 501 502 return !efx_link_state_equal(&efx->link_state, &old_state); 503 } 504 505 static void efx_mcdi_phy_remove(struct efx_nic *efx) 506 { 507 struct efx_mcdi_phy_data *phy_data = efx->phy_data; 508 509 efx->phy_data = NULL; 510 kfree(phy_data); 511 } 512 513 static void efx_mcdi_phy_get_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd) 514 { 515 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 516 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN); 517 int rc; 518 519 ecmd->supported = 520 mcdi_to_ethtool_cap(phy_cfg->media, phy_cfg->supported_cap); 521 ecmd->advertising = efx->link_advertising; 522 ethtool_cmd_speed_set(ecmd, efx->link_state.speed); 523 ecmd->duplex = efx->link_state.fd; 524 ecmd->port = mcdi_to_ethtool_media(phy_cfg->media); 525 ecmd->phy_address = phy_cfg->port; 526 ecmd->transceiver = XCVR_INTERNAL; 527 ecmd->autoneg = !!(efx->link_advertising & ADVERTISED_Autoneg); 528 ecmd->mdio_support = (efx->mdio.mode_support & 529 (MDIO_SUPPORTS_C45 | MDIO_SUPPORTS_C22)); 530 531 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0); 532 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0, 533 outbuf, sizeof(outbuf), NULL); 534 if (rc) { 535 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", 536 __func__, rc); 537 return; 538 } 539 ecmd->lp_advertising = 540 mcdi_to_ethtool_cap(phy_cfg->media, 541 MCDI_DWORD(outbuf, GET_LINK_OUT_LP_CAP)); 542 } 543 544 static int efx_mcdi_phy_set_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd) 545 { 546 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 547 u32 caps; 548 int rc; 549 550 if (ecmd->autoneg) { 551 caps = (ethtool_to_mcdi_cap(ecmd->advertising) | 552 1 << MC_CMD_PHY_CAP_AN_LBN); 553 } else if (ecmd->duplex) { 554 switch (ethtool_cmd_speed(ecmd)) { 555 case 10: caps = 1 << MC_CMD_PHY_CAP_10FDX_LBN; break; 556 case 100: caps = 1 << MC_CMD_PHY_CAP_100FDX_LBN; break; 557 case 1000: caps = 1 << MC_CMD_PHY_CAP_1000FDX_LBN; break; 558 case 10000: caps = 1 << MC_CMD_PHY_CAP_10000FDX_LBN; break; 559 case 40000: caps = 1 << MC_CMD_PHY_CAP_40000FDX_LBN; break; 560 default: return -EINVAL; 561 } 562 } else { 563 switch (ethtool_cmd_speed(ecmd)) { 564 case 10: caps = 1 << MC_CMD_PHY_CAP_10HDX_LBN; break; 565 case 100: caps = 1 << MC_CMD_PHY_CAP_100HDX_LBN; break; 566 case 1000: caps = 1 << MC_CMD_PHY_CAP_1000HDX_LBN; break; 567 default: return -EINVAL; 568 } 569 } 570 571 rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx), 572 efx->loopback_mode, 0); 573 if (rc) 574 return rc; 575 576 if (ecmd->autoneg) { 577 efx_link_set_advertising( 578 efx, ecmd->advertising | ADVERTISED_Autoneg); 579 phy_cfg->forced_cap = 0; 580 } else { 581 efx_link_set_advertising(efx, 0); 582 phy_cfg->forced_cap = caps; 583 } 584 return 0; 585 } 586 587 static int efx_mcdi_phy_test_alive(struct efx_nic *efx) 588 { 589 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_STATE_OUT_LEN); 590 size_t outlen; 591 int rc; 592 593 BUILD_BUG_ON(MC_CMD_GET_PHY_STATE_IN_LEN != 0); 594 595 rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_STATE, NULL, 0, 596 outbuf, sizeof(outbuf), &outlen); 597 if (rc) 598 return rc; 599 600 if (outlen < MC_CMD_GET_PHY_STATE_OUT_LEN) 601 return -EIO; 602 if (MCDI_DWORD(outbuf, GET_PHY_STATE_OUT_STATE) != MC_CMD_PHY_STATE_OK) 603 return -EINVAL; 604 605 return 0; 606 } 607 608 static const char *const mcdi_sft9001_cable_diag_names[] = { 609 "cable.pairA.length", 610 "cable.pairB.length", 611 "cable.pairC.length", 612 "cable.pairD.length", 613 "cable.pairA.status", 614 "cable.pairB.status", 615 "cable.pairC.status", 616 "cable.pairD.status", 617 }; 618 619 static int efx_mcdi_bist(struct efx_nic *efx, unsigned int bist_mode, 620 int *results) 621 { 622 unsigned int retry, i, count = 0; 623 size_t outlen; 624 u32 status; 625 MCDI_DECLARE_BUF(inbuf, MC_CMD_START_BIST_IN_LEN); 626 MCDI_DECLARE_BUF(outbuf, MC_CMD_POLL_BIST_OUT_SFT9001_LEN); 627 u8 *ptr; 628 int rc; 629 630 BUILD_BUG_ON(MC_CMD_START_BIST_OUT_LEN != 0); 631 MCDI_SET_DWORD(inbuf, START_BIST_IN_TYPE, bist_mode); 632 rc = efx_mcdi_rpc(efx, MC_CMD_START_BIST, 633 inbuf, MC_CMD_START_BIST_IN_LEN, NULL, 0, NULL); 634 if (rc) 635 goto out; 636 637 /* Wait up to 10s for BIST to finish */ 638 for (retry = 0; retry < 100; ++retry) { 639 BUILD_BUG_ON(MC_CMD_POLL_BIST_IN_LEN != 0); 640 rc = efx_mcdi_rpc(efx, MC_CMD_POLL_BIST, NULL, 0, 641 outbuf, sizeof(outbuf), &outlen); 642 if (rc) 643 goto out; 644 645 status = MCDI_DWORD(outbuf, POLL_BIST_OUT_RESULT); 646 if (status != MC_CMD_POLL_BIST_RUNNING) 647 goto finished; 648 649 msleep(100); 650 } 651 652 rc = -ETIMEDOUT; 653 goto out; 654 655 finished: 656 results[count++] = (status == MC_CMD_POLL_BIST_PASSED) ? 1 : -1; 657 658 /* SFT9001 specific cable diagnostics output */ 659 if (efx->phy_type == PHY_TYPE_SFT9001B && 660 (bist_mode == MC_CMD_PHY_BIST_CABLE_SHORT || 661 bist_mode == MC_CMD_PHY_BIST_CABLE_LONG)) { 662 ptr = MCDI_PTR(outbuf, POLL_BIST_OUT_SFT9001_CABLE_LENGTH_A); 663 if (status == MC_CMD_POLL_BIST_PASSED && 664 outlen >= MC_CMD_POLL_BIST_OUT_SFT9001_LEN) { 665 for (i = 0; i < 8; i++) { 666 results[count + i] = 667 EFX_DWORD_FIELD(((efx_dword_t *)ptr)[i], 668 EFX_DWORD_0); 669 } 670 } 671 count += 8; 672 } 673 rc = count; 674 675 out: 676 return rc; 677 } 678 679 static int efx_mcdi_phy_run_tests(struct efx_nic *efx, int *results, 680 unsigned flags) 681 { 682 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 683 u32 mode; 684 int rc; 685 686 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) { 687 rc = efx_mcdi_bist(efx, MC_CMD_PHY_BIST, results); 688 if (rc < 0) 689 return rc; 690 691 results += rc; 692 } 693 694 /* If we support both LONG and SHORT, then run each in response to 695 * break or not. Otherwise, run the one we support */ 696 mode = 0; 697 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN)) { 698 if ((flags & ETH_TEST_FL_OFFLINE) && 699 (phy_cfg->flags & 700 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))) 701 mode = MC_CMD_PHY_BIST_CABLE_LONG; 702 else 703 mode = MC_CMD_PHY_BIST_CABLE_SHORT; 704 } else if (phy_cfg->flags & 705 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN)) 706 mode = MC_CMD_PHY_BIST_CABLE_LONG; 707 708 if (mode != 0) { 709 rc = efx_mcdi_bist(efx, mode, results); 710 if (rc < 0) 711 return rc; 712 results += rc; 713 } 714 715 return 0; 716 } 717 718 static const char *efx_mcdi_phy_test_name(struct efx_nic *efx, 719 unsigned int index) 720 { 721 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 722 723 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) { 724 if (index == 0) 725 return "bist"; 726 --index; 727 } 728 729 if (phy_cfg->flags & ((1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN) | 730 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))) { 731 if (index == 0) 732 return "cable"; 733 --index; 734 735 if (efx->phy_type == PHY_TYPE_SFT9001B) { 736 if (index < ARRAY_SIZE(mcdi_sft9001_cable_diag_names)) 737 return mcdi_sft9001_cable_diag_names[index]; 738 index -= ARRAY_SIZE(mcdi_sft9001_cable_diag_names); 739 } 740 } 741 742 return NULL; 743 } 744 745 #define SFP_PAGE_SIZE 128 746 #define SFP_NUM_PAGES 2 747 static int efx_mcdi_phy_get_module_eeprom(struct efx_nic *efx, 748 struct ethtool_eeprom *ee, u8 *data) 749 { 750 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMAX); 751 MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_PHY_MEDIA_INFO_IN_LEN); 752 size_t outlen; 753 int rc; 754 unsigned int payload_len; 755 unsigned int space_remaining = ee->len; 756 unsigned int page; 757 unsigned int page_off; 758 unsigned int to_copy; 759 u8 *user_data = data; 760 761 BUILD_BUG_ON(SFP_PAGE_SIZE * SFP_NUM_PAGES != ETH_MODULE_SFF_8079_LEN); 762 763 page_off = ee->offset % SFP_PAGE_SIZE; 764 page = ee->offset / SFP_PAGE_SIZE; 765 766 while (space_remaining && (page < SFP_NUM_PAGES)) { 767 MCDI_SET_DWORD(inbuf, GET_PHY_MEDIA_INFO_IN_PAGE, page); 768 769 rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_MEDIA_INFO, 770 inbuf, sizeof(inbuf), 771 outbuf, sizeof(outbuf), 772 &outlen); 773 if (rc) 774 return rc; 775 776 if (outlen < (MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_OFST + 777 SFP_PAGE_SIZE)) 778 return -EIO; 779 780 payload_len = MCDI_DWORD(outbuf, 781 GET_PHY_MEDIA_INFO_OUT_DATALEN); 782 if (payload_len != SFP_PAGE_SIZE) 783 return -EIO; 784 785 /* Copy as much as we can into data */ 786 payload_len -= page_off; 787 to_copy = (space_remaining < payload_len) ? 788 space_remaining : payload_len; 789 790 memcpy(user_data, 791 MCDI_PTR(outbuf, GET_PHY_MEDIA_INFO_OUT_DATA) + page_off, 792 to_copy); 793 794 space_remaining -= to_copy; 795 user_data += to_copy; 796 page_off = 0; 797 page++; 798 } 799 800 return 0; 801 } 802 803 static int efx_mcdi_phy_get_module_info(struct efx_nic *efx, 804 struct ethtool_modinfo *modinfo) 805 { 806 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data; 807 808 switch (phy_cfg->media) { 809 case MC_CMD_MEDIA_SFP_PLUS: 810 modinfo->type = ETH_MODULE_SFF_8079; 811 modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 812 return 0; 813 default: 814 return -EOPNOTSUPP; 815 } 816 } 817 818 static const struct efx_phy_operations efx_mcdi_phy_ops = { 819 .probe = efx_mcdi_phy_probe, 820 .init = efx_port_dummy_op_int, 821 .reconfigure = efx_mcdi_port_reconfigure, 822 .poll = efx_mcdi_phy_poll, 823 .fini = efx_port_dummy_op_void, 824 .remove = efx_mcdi_phy_remove, 825 .get_settings = efx_mcdi_phy_get_settings, 826 .set_settings = efx_mcdi_phy_set_settings, 827 .test_alive = efx_mcdi_phy_test_alive, 828 .run_tests = efx_mcdi_phy_run_tests, 829 .test_name = efx_mcdi_phy_test_name, 830 .get_module_eeprom = efx_mcdi_phy_get_module_eeprom, 831 .get_module_info = efx_mcdi_phy_get_module_info, 832 }; 833 834 u32 efx_mcdi_phy_get_caps(struct efx_nic *efx) 835 { 836 struct efx_mcdi_phy_data *phy_data = efx->phy_data; 837 838 return phy_data->supported_cap; 839 } 840 841 static unsigned int efx_mcdi_event_link_speed[] = { 842 [MCDI_EVENT_LINKCHANGE_SPEED_100M] = 100, 843 [MCDI_EVENT_LINKCHANGE_SPEED_1G] = 1000, 844 [MCDI_EVENT_LINKCHANGE_SPEED_10G] = 10000, 845 [MCDI_EVENT_LINKCHANGE_SPEED_40G] = 40000, 846 }; 847 848 void efx_mcdi_process_link_change(struct efx_nic *efx, efx_qword_t *ev) 849 { 850 u32 flags, fcntl, speed, lpa; 851 852 speed = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_SPEED); 853 EFX_BUG_ON_PARANOID(speed >= ARRAY_SIZE(efx_mcdi_event_link_speed)); 854 speed = efx_mcdi_event_link_speed[speed]; 855 856 flags = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_LINK_FLAGS); 857 fcntl = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_FCNTL); 858 lpa = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_LP_CAP); 859 860 /* efx->link_state is only modified by efx_mcdi_phy_get_link(), 861 * which is only run after flushing the event queues. Therefore, it 862 * is safe to modify the link state outside of the mac_lock here. 863 */ 864 efx_mcdi_phy_decode_link(efx, &efx->link_state, speed, flags, fcntl); 865 866 efx_mcdi_phy_check_fcntl(efx, lpa); 867 868 efx_link_status_changed(efx); 869 } 870 871 int efx_mcdi_set_mac(struct efx_nic *efx) 872 { 873 u32 fcntl; 874 MCDI_DECLARE_BUF(cmdbytes, MC_CMD_SET_MAC_IN_LEN); 875 876 BUILD_BUG_ON(MC_CMD_SET_MAC_OUT_LEN != 0); 877 878 memcpy(MCDI_PTR(cmdbytes, SET_MAC_IN_ADDR), 879 efx->net_dev->dev_addr, ETH_ALEN); 880 881 MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_MTU, 882 EFX_MAX_FRAME_LEN(efx->net_dev->mtu)); 883 MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_DRAIN, 0); 884 885 /* Set simple MAC filter for Siena */ 886 MCDI_POPULATE_DWORD_1(cmdbytes, SET_MAC_IN_REJECT, 887 SET_MAC_IN_REJECT_UNCST, efx->unicast_filter); 888 889 switch (efx->wanted_fc) { 890 case EFX_FC_RX | EFX_FC_TX: 891 fcntl = MC_CMD_FCNTL_BIDIR; 892 break; 893 case EFX_FC_RX: 894 fcntl = MC_CMD_FCNTL_RESPOND; 895 break; 896 default: 897 fcntl = MC_CMD_FCNTL_OFF; 898 break; 899 } 900 if (efx->wanted_fc & EFX_FC_AUTO) 901 fcntl = MC_CMD_FCNTL_AUTO; 902 if (efx->fc_disable) 903 fcntl = MC_CMD_FCNTL_OFF; 904 905 MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_FCNTL, fcntl); 906 907 return efx_mcdi_rpc(efx, MC_CMD_SET_MAC, cmdbytes, sizeof(cmdbytes), 908 NULL, 0, NULL); 909 } 910 911 bool efx_mcdi_mac_check_fault(struct efx_nic *efx) 912 { 913 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN); 914 size_t outlength; 915 int rc; 916 917 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0); 918 919 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0, 920 outbuf, sizeof(outbuf), &outlength); 921 if (rc) { 922 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", 923 __func__, rc); 924 return true; 925 } 926 927 return MCDI_DWORD(outbuf, GET_LINK_OUT_MAC_FAULT) != 0; 928 } 929 930 static int efx_mcdi_mac_stats(struct efx_nic *efx, dma_addr_t dma_addr, 931 u32 dma_len, int enable, int clear) 932 { 933 MCDI_DECLARE_BUF(inbuf, MC_CMD_MAC_STATS_IN_LEN); 934 int rc; 935 int period = enable ? 1000 : 0; 936 937 BUILD_BUG_ON(MC_CMD_MAC_STATS_OUT_DMA_LEN != 0); 938 939 MCDI_SET_QWORD(inbuf, MAC_STATS_IN_DMA_ADDR, dma_addr); 940 MCDI_POPULATE_DWORD_7(inbuf, MAC_STATS_IN_CMD, 941 MAC_STATS_IN_DMA, !!enable, 942 MAC_STATS_IN_CLEAR, clear, 943 MAC_STATS_IN_PERIODIC_CHANGE, 1, 944 MAC_STATS_IN_PERIODIC_ENABLE, !!enable, 945 MAC_STATS_IN_PERIODIC_CLEAR, 0, 946 MAC_STATS_IN_PERIODIC_NOEVENT, 1, 947 MAC_STATS_IN_PERIOD_MS, period); 948 MCDI_SET_DWORD(inbuf, MAC_STATS_IN_DMA_LEN, dma_len); 949 950 rc = efx_mcdi_rpc(efx, MC_CMD_MAC_STATS, inbuf, sizeof(inbuf), 951 NULL, 0, NULL); 952 if (rc) 953 goto fail; 954 955 return 0; 956 957 fail: 958 netif_err(efx, hw, efx->net_dev, "%s: %s failed rc=%d\n", 959 __func__, enable ? "enable" : "disable", rc); 960 return rc; 961 } 962 963 void efx_mcdi_mac_start_stats(struct efx_nic *efx) 964 { 965 __le64 *dma_stats = efx->stats_buffer.addr; 966 967 dma_stats[MC_CMD_MAC_GENERATION_END] = EFX_MC_STATS_GENERATION_INVALID; 968 969 efx_mcdi_mac_stats(efx, efx->stats_buffer.dma_addr, 970 MC_CMD_MAC_NSTATS * sizeof(u64), 1, 0); 971 } 972 973 void efx_mcdi_mac_stop_stats(struct efx_nic *efx) 974 { 975 efx_mcdi_mac_stats(efx, efx->stats_buffer.dma_addr, 0, 0, 0); 976 } 977 978 int efx_mcdi_port_probe(struct efx_nic *efx) 979 { 980 int rc; 981 982 /* Hook in PHY operations table */ 983 efx->phy_op = &efx_mcdi_phy_ops; 984 985 /* Set up MDIO structure for PHY */ 986 efx->mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22; 987 efx->mdio.mdio_read = efx_mcdi_mdio_read; 988 efx->mdio.mdio_write = efx_mcdi_mdio_write; 989 990 /* Fill out MDIO structure, loopback modes, and initial link state */ 991 rc = efx->phy_op->probe(efx); 992 if (rc != 0) 993 return rc; 994 995 /* Allocate buffer for stats */ 996 rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer, 997 MC_CMD_MAC_NSTATS * sizeof(u64), GFP_KERNEL); 998 if (rc) 999 return rc; 1000 netif_dbg(efx, probe, efx->net_dev, 1001 "stats buffer at %llx (virt %p phys %llx)\n", 1002 (u64)efx->stats_buffer.dma_addr, 1003 efx->stats_buffer.addr, 1004 (u64)virt_to_phys(efx->stats_buffer.addr)); 1005 1006 efx_mcdi_mac_stats(efx, efx->stats_buffer.dma_addr, 0, 0, 1); 1007 1008 return 0; 1009 } 1010 1011 void efx_mcdi_port_remove(struct efx_nic *efx) 1012 { 1013 efx->phy_op->remove(efx); 1014 efx_nic_free_buffer(efx, &efx->stats_buffer); 1015 } 1016 1017 /* Get physical port number (EF10 only; on Siena it is same as PF number) */ 1018 int efx_mcdi_port_get_number(struct efx_nic *efx) 1019 { 1020 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PORT_ASSIGNMENT_OUT_LEN); 1021 int rc; 1022 1023 rc = efx_mcdi_rpc(efx, MC_CMD_GET_PORT_ASSIGNMENT, NULL, 0, 1024 outbuf, sizeof(outbuf), NULL); 1025 if (rc) 1026 return rc; 1027 1028 return MCDI_DWORD(outbuf, GET_PORT_ASSIGNMENT_OUT_PORT); 1029 } 1030