1 /**************************************************************************** 2 * Driver for Solarflare network controllers and boards 3 * Copyright 2011-2013 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 #include <linux/bitops.h> 11 #include <linux/slab.h> 12 #include <linux/hwmon.h> 13 #include <linux/stat.h> 14 15 #include "net_driver.h" 16 #include "mcdi.h" 17 #include "mcdi_pcol.h" 18 #include "nic.h" 19 20 enum efx_hwmon_type { 21 EFX_HWMON_UNKNOWN, 22 EFX_HWMON_TEMP, /* temperature */ 23 EFX_HWMON_COOL, /* cooling device, probably a heatsink */ 24 EFX_HWMON_IN, /* voltage */ 25 EFX_HWMON_CURR, /* current */ 26 EFX_HWMON_POWER, /* power */ 27 EFX_HWMON_TYPES_COUNT 28 }; 29 30 static const char *const efx_hwmon_unit[EFX_HWMON_TYPES_COUNT] = { 31 [EFX_HWMON_TEMP] = " degC", 32 [EFX_HWMON_COOL] = " rpm", /* though nonsense for a heatsink */ 33 [EFX_HWMON_IN] = " mV", 34 [EFX_HWMON_CURR] = " mA", 35 [EFX_HWMON_POWER] = " W", 36 }; 37 38 static const struct { 39 const char *label; 40 enum efx_hwmon_type hwmon_type; 41 int port; 42 } efx_mcdi_sensor_type[] = { 43 #define SENSOR(name, label, hwmon_type, port) \ 44 [MC_CMD_SENSOR_##name] = { label, EFX_HWMON_ ## hwmon_type, port } 45 SENSOR(CONTROLLER_TEMP, "Controller board temp.", TEMP, -1), 46 SENSOR(PHY_COMMON_TEMP, "PHY temp.", TEMP, -1), 47 SENSOR(CONTROLLER_COOLING, "Controller heat sink", COOL, -1), 48 SENSOR(PHY0_TEMP, "PHY temp.", TEMP, 0), 49 SENSOR(PHY0_COOLING, "PHY heat sink", COOL, 0), 50 SENSOR(PHY1_TEMP, "PHY temp.", TEMP, 1), 51 SENSOR(PHY1_COOLING, "PHY heat sink", COOL, 1), 52 SENSOR(IN_1V0, "1.0V supply", IN, -1), 53 SENSOR(IN_1V2, "1.2V supply", IN, -1), 54 SENSOR(IN_1V8, "1.8V supply", IN, -1), 55 SENSOR(IN_2V5, "2.5V supply", IN, -1), 56 SENSOR(IN_3V3, "3.3V supply", IN, -1), 57 SENSOR(IN_12V0, "12.0V supply", IN, -1), 58 SENSOR(IN_1V2A, "1.2V analogue supply", IN, -1), 59 SENSOR(IN_VREF, "Ref. voltage", IN, -1), 60 SENSOR(OUT_VAOE, "AOE FPGA supply", IN, -1), 61 SENSOR(AOE_TEMP, "AOE FPGA temp.", TEMP, -1), 62 SENSOR(PSU_AOE_TEMP, "AOE regulator temp.", TEMP, -1), 63 SENSOR(PSU_TEMP, "Controller regulator temp.", 64 TEMP, -1), 65 SENSOR(FAN_0, "Fan 0", COOL, -1), 66 SENSOR(FAN_1, "Fan 1", COOL, -1), 67 SENSOR(FAN_2, "Fan 2", COOL, -1), 68 SENSOR(FAN_3, "Fan 3", COOL, -1), 69 SENSOR(FAN_4, "Fan 4", COOL, -1), 70 SENSOR(IN_VAOE, "AOE input supply", IN, -1), 71 SENSOR(OUT_IAOE, "AOE output current", CURR, -1), 72 SENSOR(IN_IAOE, "AOE input current", CURR, -1), 73 SENSOR(NIC_POWER, "Board power use", POWER, -1), 74 SENSOR(IN_0V9, "0.9V supply", IN, -1), 75 SENSOR(IN_I0V9, "0.9V supply current", CURR, -1), 76 SENSOR(IN_I1V2, "1.2V supply current", CURR, -1), 77 SENSOR(IN_0V9_ADC, "0.9V supply (ext. ADC)", IN, -1), 78 SENSOR(CONTROLLER_2_TEMP, "Controller board temp. 2", TEMP, -1), 79 SENSOR(VREG_INTERNAL_TEMP, "Regulator die temp.", TEMP, -1), 80 SENSOR(VREG_0V9_TEMP, "0.9V regulator temp.", TEMP, -1), 81 SENSOR(VREG_1V2_TEMP, "1.2V regulator temp.", TEMP, -1), 82 SENSOR(CONTROLLER_VPTAT, 83 "Controller PTAT voltage (int. ADC)", IN, -1), 84 SENSOR(CONTROLLER_INTERNAL_TEMP, 85 "Controller die temp. (int. ADC)", TEMP, -1), 86 SENSOR(CONTROLLER_VPTAT_EXTADC, 87 "Controller PTAT voltage (ext. ADC)", IN, -1), 88 SENSOR(CONTROLLER_INTERNAL_TEMP_EXTADC, 89 "Controller die temp. (ext. ADC)", TEMP, -1), 90 SENSOR(AMBIENT_TEMP, "Ambient temp.", TEMP, -1), 91 SENSOR(AIRFLOW, "Air flow raw", IN, -1), 92 SENSOR(VDD08D_VSS08D_CSR, "0.9V die (int. ADC)", IN, -1), 93 SENSOR(VDD08D_VSS08D_CSR_EXTADC, "0.9V die (ext. ADC)", IN, -1), 94 SENSOR(HOTPOINT_TEMP, "Controller board temp. (hotpoint)", TEMP, -1), 95 #undef SENSOR 96 }; 97 98 static const char *const sensor_status_names[] = { 99 [MC_CMD_SENSOR_STATE_OK] = "OK", 100 [MC_CMD_SENSOR_STATE_WARNING] = "Warning", 101 [MC_CMD_SENSOR_STATE_FATAL] = "Fatal", 102 [MC_CMD_SENSOR_STATE_BROKEN] = "Device failure", 103 [MC_CMD_SENSOR_STATE_NO_READING] = "No reading", 104 }; 105 106 void efx_mcdi_sensor_event(struct efx_nic *efx, efx_qword_t *ev) 107 { 108 unsigned int type, state, value; 109 enum efx_hwmon_type hwmon_type = EFX_HWMON_UNKNOWN; 110 const char *name = NULL, *state_txt, *unit; 111 112 type = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_MONITOR); 113 state = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_STATE); 114 value = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_VALUE); 115 116 /* Deal gracefully with the board having more drivers than we 117 * know about, but do not expect new sensor states. */ 118 if (type < ARRAY_SIZE(efx_mcdi_sensor_type)) { 119 name = efx_mcdi_sensor_type[type].label; 120 hwmon_type = efx_mcdi_sensor_type[type].hwmon_type; 121 } 122 if (!name) 123 name = "No sensor name available"; 124 EFX_WARN_ON_PARANOID(state >= ARRAY_SIZE(sensor_status_names)); 125 state_txt = sensor_status_names[state]; 126 EFX_WARN_ON_PARANOID(hwmon_type >= EFX_HWMON_TYPES_COUNT); 127 unit = efx_hwmon_unit[hwmon_type]; 128 if (!unit) 129 unit = ""; 130 131 netif_err(efx, hw, efx->net_dev, 132 "Sensor %d (%s) reports condition '%s' for value %d%s\n", 133 type, name, state_txt, value, unit); 134 } 135 136 #ifdef CONFIG_SFC_MCDI_MON 137 138 struct efx_mcdi_mon_attribute { 139 struct device_attribute dev_attr; 140 unsigned int index; 141 unsigned int type; 142 enum efx_hwmon_type hwmon_type; 143 unsigned int limit_value; 144 char name[12]; 145 }; 146 147 static int efx_mcdi_mon_update(struct efx_nic *efx) 148 { 149 struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx); 150 MCDI_DECLARE_BUF(inbuf, MC_CMD_READ_SENSORS_EXT_IN_LEN); 151 int rc; 152 153 MCDI_SET_QWORD(inbuf, READ_SENSORS_EXT_IN_DMA_ADDR, 154 hwmon->dma_buf.dma_addr); 155 MCDI_SET_DWORD(inbuf, READ_SENSORS_EXT_IN_LENGTH, hwmon->dma_buf.len); 156 157 rc = efx_mcdi_rpc(efx, MC_CMD_READ_SENSORS, 158 inbuf, sizeof(inbuf), NULL, 0, NULL); 159 if (rc == 0) 160 hwmon->last_update = jiffies; 161 return rc; 162 } 163 164 static int efx_mcdi_mon_get_entry(struct device *dev, unsigned int index, 165 efx_dword_t *entry) 166 { 167 struct efx_nic *efx = dev_get_drvdata(dev->parent); 168 struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx); 169 int rc; 170 171 BUILD_BUG_ON(MC_CMD_READ_SENSORS_OUT_LEN != 0); 172 173 mutex_lock(&hwmon->update_lock); 174 175 /* Use cached value if last update was < 1 s ago */ 176 if (time_before(jiffies, hwmon->last_update + HZ)) 177 rc = 0; 178 else 179 rc = efx_mcdi_mon_update(efx); 180 181 /* Copy out the requested entry */ 182 *entry = ((efx_dword_t *)hwmon->dma_buf.addr)[index]; 183 184 mutex_unlock(&hwmon->update_lock); 185 186 return rc; 187 } 188 189 static ssize_t efx_mcdi_mon_show_value(struct device *dev, 190 struct device_attribute *attr, 191 char *buf) 192 { 193 struct efx_mcdi_mon_attribute *mon_attr = 194 container_of(attr, struct efx_mcdi_mon_attribute, dev_attr); 195 efx_dword_t entry; 196 unsigned int value, state; 197 int rc; 198 199 rc = efx_mcdi_mon_get_entry(dev, mon_attr->index, &entry); 200 if (rc) 201 return rc; 202 203 state = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_STATE); 204 if (state == MC_CMD_SENSOR_STATE_NO_READING) 205 return -EBUSY; 206 207 value = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_VALUE); 208 209 switch (mon_attr->hwmon_type) { 210 case EFX_HWMON_TEMP: 211 /* Convert temperature from degrees to milli-degrees Celsius */ 212 value *= 1000; 213 break; 214 case EFX_HWMON_POWER: 215 /* Convert power from watts to microwatts */ 216 value *= 1000000; 217 break; 218 default: 219 /* No conversion needed */ 220 break; 221 } 222 223 return sprintf(buf, "%u\n", value); 224 } 225 226 static ssize_t efx_mcdi_mon_show_limit(struct device *dev, 227 struct device_attribute *attr, 228 char *buf) 229 { 230 struct efx_mcdi_mon_attribute *mon_attr = 231 container_of(attr, struct efx_mcdi_mon_attribute, dev_attr); 232 unsigned int value; 233 234 value = mon_attr->limit_value; 235 236 switch (mon_attr->hwmon_type) { 237 case EFX_HWMON_TEMP: 238 /* Convert temperature from degrees to milli-degrees Celsius */ 239 value *= 1000; 240 break; 241 case EFX_HWMON_POWER: 242 /* Convert power from watts to microwatts */ 243 value *= 1000000; 244 break; 245 default: 246 /* No conversion needed */ 247 break; 248 } 249 250 return sprintf(buf, "%u\n", value); 251 } 252 253 static ssize_t efx_mcdi_mon_show_alarm(struct device *dev, 254 struct device_attribute *attr, 255 char *buf) 256 { 257 struct efx_mcdi_mon_attribute *mon_attr = 258 container_of(attr, struct efx_mcdi_mon_attribute, dev_attr); 259 efx_dword_t entry; 260 int state; 261 int rc; 262 263 rc = efx_mcdi_mon_get_entry(dev, mon_attr->index, &entry); 264 if (rc) 265 return rc; 266 267 state = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_STATE); 268 return sprintf(buf, "%d\n", state != MC_CMD_SENSOR_STATE_OK); 269 } 270 271 static ssize_t efx_mcdi_mon_show_label(struct device *dev, 272 struct device_attribute *attr, 273 char *buf) 274 { 275 struct efx_mcdi_mon_attribute *mon_attr = 276 container_of(attr, struct efx_mcdi_mon_attribute, dev_attr); 277 return sprintf(buf, "%s\n", 278 efx_mcdi_sensor_type[mon_attr->type].label); 279 } 280 281 static void 282 efx_mcdi_mon_add_attr(struct efx_nic *efx, const char *name, 283 ssize_t (*reader)(struct device *, 284 struct device_attribute *, char *), 285 unsigned int index, unsigned int type, 286 unsigned int limit_value) 287 { 288 struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx); 289 struct efx_mcdi_mon_attribute *attr = &hwmon->attrs[hwmon->n_attrs]; 290 291 strlcpy(attr->name, name, sizeof(attr->name)); 292 attr->index = index; 293 attr->type = type; 294 if (type < ARRAY_SIZE(efx_mcdi_sensor_type)) 295 attr->hwmon_type = efx_mcdi_sensor_type[type].hwmon_type; 296 else 297 attr->hwmon_type = EFX_HWMON_UNKNOWN; 298 attr->limit_value = limit_value; 299 sysfs_attr_init(&attr->dev_attr.attr); 300 attr->dev_attr.attr.name = attr->name; 301 attr->dev_attr.attr.mode = 0444; 302 attr->dev_attr.show = reader; 303 hwmon->group.attrs[hwmon->n_attrs++] = &attr->dev_attr.attr; 304 } 305 306 int efx_mcdi_mon_probe(struct efx_nic *efx) 307 { 308 unsigned int n_temp = 0, n_cool = 0, n_in = 0, n_curr = 0, n_power = 0; 309 struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx); 310 MCDI_DECLARE_BUF(inbuf, MC_CMD_SENSOR_INFO_EXT_IN_LEN); 311 MCDI_DECLARE_BUF(outbuf, MC_CMD_SENSOR_INFO_OUT_LENMAX); 312 unsigned int n_pages, n_sensors, n_attrs, page; 313 size_t outlen; 314 char name[12]; 315 u32 mask; 316 int rc, i, j, type; 317 318 /* Find out how many sensors are present */ 319 n_sensors = 0; 320 page = 0; 321 do { 322 MCDI_SET_DWORD(inbuf, SENSOR_INFO_EXT_IN_PAGE, page); 323 324 rc = efx_mcdi_rpc(efx, MC_CMD_SENSOR_INFO, inbuf, sizeof(inbuf), 325 outbuf, sizeof(outbuf), &outlen); 326 if (rc) 327 return rc; 328 if (outlen < MC_CMD_SENSOR_INFO_OUT_LENMIN) 329 return -EIO; 330 331 mask = MCDI_DWORD(outbuf, SENSOR_INFO_OUT_MASK); 332 n_sensors += hweight32(mask & ~(1 << MC_CMD_SENSOR_PAGE0_NEXT)); 333 ++page; 334 } while (mask & (1 << MC_CMD_SENSOR_PAGE0_NEXT)); 335 n_pages = page; 336 337 /* Don't create a device if there are none */ 338 if (n_sensors == 0) 339 return 0; 340 341 rc = efx_nic_alloc_buffer( 342 efx, &hwmon->dma_buf, 343 n_sensors * MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_LEN, 344 GFP_KERNEL); 345 if (rc) 346 return rc; 347 348 mutex_init(&hwmon->update_lock); 349 efx_mcdi_mon_update(efx); 350 351 /* Allocate space for the maximum possible number of 352 * attributes for this set of sensors: 353 * value, min, max, crit, alarm and label for each sensor. 354 */ 355 n_attrs = 6 * n_sensors; 356 hwmon->attrs = kcalloc(n_attrs, sizeof(*hwmon->attrs), GFP_KERNEL); 357 if (!hwmon->attrs) { 358 rc = -ENOMEM; 359 goto fail; 360 } 361 hwmon->group.attrs = kcalloc(n_attrs + 1, sizeof(struct attribute *), 362 GFP_KERNEL); 363 if (!hwmon->group.attrs) { 364 rc = -ENOMEM; 365 goto fail; 366 } 367 368 for (i = 0, j = -1, type = -1; ; i++) { 369 enum efx_hwmon_type hwmon_type; 370 const char *hwmon_prefix; 371 unsigned hwmon_index; 372 u16 min1, max1, min2, max2; 373 374 /* Find next sensor type or exit if there is none */ 375 do { 376 type++; 377 378 if ((type % 32) == 0) { 379 page = type / 32; 380 j = -1; 381 if (page == n_pages) 382 goto hwmon_register; 383 384 MCDI_SET_DWORD(inbuf, SENSOR_INFO_EXT_IN_PAGE, 385 page); 386 rc = efx_mcdi_rpc(efx, MC_CMD_SENSOR_INFO, 387 inbuf, sizeof(inbuf), 388 outbuf, sizeof(outbuf), 389 &outlen); 390 if (rc) 391 goto fail; 392 if (outlen < MC_CMD_SENSOR_INFO_OUT_LENMIN) { 393 rc = -EIO; 394 goto fail; 395 } 396 397 mask = (MCDI_DWORD(outbuf, 398 SENSOR_INFO_OUT_MASK) & 399 ~(1 << MC_CMD_SENSOR_PAGE0_NEXT)); 400 401 /* Check again for short response */ 402 if (outlen < 403 MC_CMD_SENSOR_INFO_OUT_LEN(hweight32(mask))) { 404 rc = -EIO; 405 goto fail; 406 } 407 } 408 } while (!(mask & (1 << type % 32))); 409 j++; 410 411 if (type < ARRAY_SIZE(efx_mcdi_sensor_type)) { 412 hwmon_type = efx_mcdi_sensor_type[type].hwmon_type; 413 414 /* Skip sensors specific to a different port */ 415 if (hwmon_type != EFX_HWMON_UNKNOWN && 416 efx_mcdi_sensor_type[type].port >= 0 && 417 efx_mcdi_sensor_type[type].port != 418 efx_port_num(efx)) 419 continue; 420 } else { 421 hwmon_type = EFX_HWMON_UNKNOWN; 422 } 423 424 switch (hwmon_type) { 425 case EFX_HWMON_TEMP: 426 hwmon_prefix = "temp"; 427 hwmon_index = ++n_temp; /* 1-based */ 428 break; 429 case EFX_HWMON_COOL: 430 /* This is likely to be a heatsink, but there 431 * is no convention for representing cooling 432 * devices other than fans. 433 */ 434 hwmon_prefix = "fan"; 435 hwmon_index = ++n_cool; /* 1-based */ 436 break; 437 default: 438 hwmon_prefix = "in"; 439 hwmon_index = n_in++; /* 0-based */ 440 break; 441 case EFX_HWMON_CURR: 442 hwmon_prefix = "curr"; 443 hwmon_index = ++n_curr; /* 1-based */ 444 break; 445 case EFX_HWMON_POWER: 446 hwmon_prefix = "power"; 447 hwmon_index = ++n_power; /* 1-based */ 448 break; 449 } 450 451 min1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY, 452 SENSOR_INFO_ENTRY, j, MIN1); 453 max1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY, 454 SENSOR_INFO_ENTRY, j, MAX1); 455 min2 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY, 456 SENSOR_INFO_ENTRY, j, MIN2); 457 max2 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY, 458 SENSOR_INFO_ENTRY, j, MAX2); 459 460 if (min1 != max1) { 461 snprintf(name, sizeof(name), "%s%u_input", 462 hwmon_prefix, hwmon_index); 463 efx_mcdi_mon_add_attr( 464 efx, name, efx_mcdi_mon_show_value, i, type, 0); 465 466 if (hwmon_type != EFX_HWMON_POWER) { 467 snprintf(name, sizeof(name), "%s%u_min", 468 hwmon_prefix, hwmon_index); 469 efx_mcdi_mon_add_attr( 470 efx, name, efx_mcdi_mon_show_limit, 471 i, type, min1); 472 } 473 474 snprintf(name, sizeof(name), "%s%u_max", 475 hwmon_prefix, hwmon_index); 476 efx_mcdi_mon_add_attr( 477 efx, name, efx_mcdi_mon_show_limit, 478 i, type, max1); 479 480 if (min2 != max2) { 481 /* Assume max2 is critical value. 482 * But we have no good way to expose min2. 483 */ 484 snprintf(name, sizeof(name), "%s%u_crit", 485 hwmon_prefix, hwmon_index); 486 efx_mcdi_mon_add_attr( 487 efx, name, efx_mcdi_mon_show_limit, 488 i, type, max2); 489 } 490 } 491 492 snprintf(name, sizeof(name), "%s%u_alarm", 493 hwmon_prefix, hwmon_index); 494 efx_mcdi_mon_add_attr( 495 efx, name, efx_mcdi_mon_show_alarm, i, type, 0); 496 497 if (type < ARRAY_SIZE(efx_mcdi_sensor_type) && 498 efx_mcdi_sensor_type[type].label) { 499 snprintf(name, sizeof(name), "%s%u_label", 500 hwmon_prefix, hwmon_index); 501 efx_mcdi_mon_add_attr( 502 efx, name, efx_mcdi_mon_show_label, i, type, 0); 503 } 504 } 505 506 hwmon_register: 507 hwmon->groups[0] = &hwmon->group; 508 hwmon->device = hwmon_device_register_with_groups(&efx->pci_dev->dev, 509 KBUILD_MODNAME, NULL, 510 hwmon->groups); 511 if (IS_ERR(hwmon->device)) { 512 rc = PTR_ERR(hwmon->device); 513 goto fail; 514 } 515 516 return 0; 517 518 fail: 519 efx_mcdi_mon_remove(efx); 520 return rc; 521 } 522 523 void efx_mcdi_mon_remove(struct efx_nic *efx) 524 { 525 struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx); 526 527 if (hwmon->device) 528 hwmon_device_unregister(hwmon->device); 529 kfree(hwmon->attrs); 530 kfree(hwmon->group.attrs); 531 efx_nic_free_buffer(efx, &hwmon->dma_buf); 532 } 533 534 #endif /* CONFIG_SFC_MCDI_MON */ 535