drivers/misc/habanalabs/sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 /*
   4  * Copyright 2016-2019 HabanaLabs, Ltd.
   5  * All Rights Reserved.
   6  */
   7
   8 #include "habanalabs.h"
   9
  10 #include <linux/pci.h>
  11
  12 #define SET_CLK_PKT_TIMEOUT     1000000 /* 1s */
  13 #define SET_PWR_PKT_TIMEOUT     1000000 /* 1s */
  14
  15 long hl_get_frequency(struct hl_device *hdev, u32 pll_index, bool curr)
  16 {
  17         struct armcp_packet pkt;
  18         long result;
  19         int rc;
  20
  21         memset(&pkt, 0, sizeof(pkt));
  22
  23         if (curr)
  24                 pkt.ctl = ARMCP_PACKET_FREQUENCY_CURR_GET <<
  25                                                 ARMCP_PKT_CTL_OPCODE_SHIFT;
  26         else
  27                 pkt.ctl = ARMCP_PACKET_FREQUENCY_GET <<
  28                                                 ARMCP_PKT_CTL_OPCODE_SHIFT;
  29         pkt.pll_index = pll_index;
  30
  31         rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
  32                                                 SET_CLK_PKT_TIMEOUT, &result);
  33
  34         if (rc) {
  35                 dev_err(hdev->dev,
  36                         "Failed to get frequency of PLL %d, error %d\n",
  37                         pll_index, rc);
  38                 result = rc;
  39         }
  40
  41         return result;
  42 }
  43
  44 void hl_set_frequency(struct hl_device *hdev, u32 pll_index, u64 freq)
  45 {
  46         struct armcp_packet pkt;
  47         int rc;
  48
  49         memset(&pkt, 0, sizeof(pkt));
  50
  51         pkt.ctl = ARMCP_PACKET_FREQUENCY_SET << ARMCP_PKT_CTL_OPCODE_SHIFT;
  52         pkt.pll_index = pll_index;
  53         pkt.value = freq;
  54
  55         rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
  56                                         SET_CLK_PKT_TIMEOUT, NULL);
  57
  58         if (rc)
  59                 dev_err(hdev->dev,
  60                         "Failed to set frequency to PLL %d, error %d\n",
  61                         pll_index, rc);
  62 }
  63
  64 u64 hl_get_max_power(struct hl_device *hdev)
  65 {
  66         struct armcp_packet pkt;
  67         long result;
  68         int rc;
  69
  70         memset(&pkt, 0, sizeof(pkt));
  71
  72         pkt.ctl = ARMCP_PACKET_MAX_POWER_GET << ARMCP_PKT_CTL_OPCODE_SHIFT;
  73
  74         rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
  75                                                 SET_PWR_PKT_TIMEOUT, &result);
  76
  77         if (rc) {
  78                 dev_err(hdev->dev, "Failed to get max power, error %d\n", rc);
  79                 result = rc;
  80         }
  81
  82         return result;
  83 }
  84
  85 void hl_set_max_power(struct hl_device *hdev, u64 value)
  86 {
  87         struct armcp_packet pkt;
  88         int rc;
  89
  90         memset(&pkt, 0, sizeof(pkt));
  91
  92         pkt.ctl = ARMCP_PACKET_MAX_POWER_SET << ARMCP_PKT_CTL_OPCODE_SHIFT;
  93         pkt.value = value;
  94
  95         rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
  96                                         SET_PWR_PKT_TIMEOUT, NULL);
  97
  98         if (rc)
  99                 dev_err(hdev->dev, "Failed to set max power, error %d\n", rc);
 100 }
 101
 102 static ssize_t pm_mng_profile_show(struct device *dev,
 103                                 struct device_attribute *attr, char *buf)
 104 {
 105         struct hl_device *hdev = dev_get_drvdata(dev);
 106
 107         if (hl_device_disabled_or_in_reset(hdev))
 108                 return -ENODEV;
 109
 110         return sprintf(buf, "%s\n",
 111                         (hdev->pm_mng_profile == PM_AUTO) ? "auto" :
 112                         (hdev->pm_mng_profile == PM_MANUAL) ? "manual" :
 113                         "unknown");
 114 }
 115
 116 static ssize_t pm_mng_profile_store(struct device *dev,
 117                 struct device_attribute *attr, const char *buf, size_t count)
 118 {
 119         struct hl_device *hdev = dev_get_drvdata(dev);
 120
 121         if (hl_device_disabled_or_in_reset(hdev)) {
 122                 count = -ENODEV;
 123                 goto out;
 124         }
 125
 126         mutex_lock(&hdev->fd_open_cnt_lock);
 127
 128         if (atomic_read(&hdev->fd_open_cnt) > 0) {
 129                 dev_err(hdev->dev,
 130                         "Can't change PM profile while user process is opened on the device\n");
 131                 count = -EPERM;
 132                 goto unlock_mutex;
 133         }
 134
 135         if (strncmp("auto", buf, strlen("auto")) == 0) {
 136                 /* Make sure we are in LOW PLL when changing modes */
 137                 if (hdev->pm_mng_profile == PM_MANUAL) {
 138                         atomic_set(&hdev->curr_pll_profile, PLL_HIGH);
 139                         hl_device_set_frequency(hdev, PLL_LOW);
 140                         hdev->pm_mng_profile = PM_AUTO;
 141                 }
 142         } else if (strncmp("manual", buf, strlen("manual")) == 0) {
 143                 /* Make sure we are in LOW PLL when changing modes */
 144                 if (hdev->pm_mng_profile == PM_AUTO) {
 145                         flush_delayed_work(&hdev->work_freq);
 146                         hdev->pm_mng_profile = PM_MANUAL;
 147                 }
 148         } else {
 149                 dev_err(hdev->dev, "value should be auto or manual\n");
 150                 count = -EINVAL;
 151                 goto unlock_mutex;
 152         }
 153
 154 unlock_mutex:
 155         mutex_unlock(&hdev->fd_open_cnt_lock);
 156 out:
 157         return count;
 158 }
 159
 160 static ssize_t high_pll_show(struct device *dev, struct device_attribute *attr,
 161                                 char *buf)
 162 {
 163         struct hl_device *hdev = dev_get_drvdata(dev);
 164
 165         if (hl_device_disabled_or_in_reset(hdev))
 166                 return -ENODEV;
 167
 168         return sprintf(buf, "%u\n", hdev->high_pll);
 169 }
 170
 171 static ssize_t high_pll_store(struct device *dev, struct device_attribute *attr,
 172                                 const char *buf, size_t count)
 173 {
 174         struct hl_device *hdev = dev_get_drvdata(dev);
 175         long value;
 176         int rc;
 177
 178         if (hl_device_disabled_or_in_reset(hdev)) {
 179                 count = -ENODEV;
 180                 goto out;
 181         }
 182
 183         rc = kstrtoul(buf, 0, &value);
 184
 185         if (rc) {
 186                 count = -EINVAL;
 187                 goto out;
 188         }
 189
 190         hdev->high_pll = value;
 191
 192 out:
 193         return count;
 194 }
 195
 196 static ssize_t uboot_ver_show(struct device *dev, struct device_attribute *attr,
 197                                 char *buf)
 198 {
 199         struct hl_device *hdev = dev_get_drvdata(dev);
 200
 201         return sprintf(buf, "%s\n", hdev->asic_prop.uboot_ver);
 202 }
 203
 204 static ssize_t armcp_kernel_ver_show(struct device *dev,
 205                                 struct device_attribute *attr, char *buf)
 206 {
 207         struct hl_device *hdev = dev_get_drvdata(dev);
 208
 209         return sprintf(buf, "%s", hdev->asic_prop.armcp_info.kernel_version);
 210 }
 211
 212 static ssize_t armcp_ver_show(struct device *dev, struct device_attribute *attr,
 213                                 char *buf)
 214 {
 215         struct hl_device *hdev = dev_get_drvdata(dev);
 216
 217         return sprintf(buf, "%s\n", hdev->asic_prop.armcp_info.armcp_version);
 218 }
 219
 220 static ssize_t cpld_ver_show(struct device *dev, struct device_attribute *attr,
 221                                 char *buf)
 222 {
 223         struct hl_device *hdev = dev_get_drvdata(dev);
 224
 225         return sprintf(buf, "0x%08x\n",
 226                         hdev->asic_prop.armcp_info.cpld_version);
 227 }
 228
 229 static ssize_t infineon_ver_show(struct device *dev,
 230                                 struct device_attribute *attr, char *buf)
 231 {
 232         struct hl_device *hdev = dev_get_drvdata(dev);
 233
 234         return sprintf(buf, "0x%04x\n",
 235                         hdev->asic_prop.armcp_info.infineon_version);
 236 }
 237
 238 static ssize_t fuse_ver_show(struct device *dev, struct device_attribute *attr,
 239                                 char *buf)
 240 {
 241         struct hl_device *hdev = dev_get_drvdata(dev);
 242
 243         return sprintf(buf, "%s\n", hdev->asic_prop.armcp_info.fuse_version);
 244 }
 245
 246 static ssize_t thermal_ver_show(struct device *dev,
 247                                 struct device_attribute *attr, char *buf)
 248 {
 249         struct hl_device *hdev = dev_get_drvdata(dev);
 250
 251         return sprintf(buf, "%s", hdev->asic_prop.armcp_info.thermal_version);
 252 }
 253
 254 static ssize_t preboot_btl_ver_show(struct device *dev,
 255                                 struct device_attribute *attr, char *buf)
 256 {
 257         struct hl_device *hdev = dev_get_drvdata(dev);
 258
 259         return sprintf(buf, "%s\n", hdev->asic_prop.preboot_ver);
 260 }
 261
 262 static ssize_t soft_reset_store(struct device *dev,
 263                                 struct device_attribute *attr, const char *buf,
 264                                 size_t count)
 265 {
 266         struct hl_device *hdev = dev_get_drvdata(dev);
 267         long value;
 268         int rc;
 269
 270         rc = kstrtoul(buf, 0, &value);
 271
 272         if (rc) {
 273                 count = -EINVAL;
 274                 goto out;
 275         }
 276
 277         hl_device_reset(hdev, false, false);
 278
 279 out:
 280         return count;
 281 }
 282
 283 static ssize_t hard_reset_store(struct device *dev,
 284                                 struct device_attribute *attr,
 285                                 const char *buf, size_t count)
 286 {
 287         struct hl_device *hdev = dev_get_drvdata(dev);
 288         long value;
 289         int rc;
 290
 291         rc = kstrtoul(buf, 0, &value);
 292
 293         if (rc) {
 294                 count = -EINVAL;
 295                 goto out;
 296         }
 297
 298         hl_device_reset(hdev, true, false);
 299
 300 out:
 301         return count;
 302 }
 303
 304 static ssize_t device_type_show(struct device *dev,
 305                 struct device_attribute *attr, char *buf)
 306 {
 307         struct hl_device *hdev = dev_get_drvdata(dev);
 308         char *str;
 309
 310         switch (hdev->asic_type) {
 311         case ASIC_GOYA:
 312                 str = "GOYA";
 313                 break;
 314         default:
 315                 dev_err(hdev->dev, "Unrecognized ASIC type %d\n",
 316                                 hdev->asic_type);
 317                 return -EINVAL;
 318         }
 319
 320         return sprintf(buf, "%s\n", str);
 321 }
 322
 323 static ssize_t pci_addr_show(struct device *dev, struct device_attribute *attr,
 324                                 char *buf)
 325 {
 326         struct hl_device *hdev = dev_get_drvdata(dev);
 327
 328         /* Use dummy, fixed address for simulator */
 329         if (!hdev->pdev)
 330                 return sprintf(buf, "0000:%02d:00.0\n", hdev->id);
 331
 332         return sprintf(buf, "%04x:%02x:%02x.%x\n",
 333                         pci_domain_nr(hdev->pdev->bus),
 334                         hdev->pdev->bus->number,
 335                         PCI_SLOT(hdev->pdev->devfn),
 336                         PCI_FUNC(hdev->pdev->devfn));
 337 }
 338
 339 static ssize_t status_show(struct device *dev, struct device_attribute *attr,
 340                                 char *buf)
 341 {
 342         struct hl_device *hdev = dev_get_drvdata(dev);
 343         char *str;
 344
 345         if (atomic_read(&hdev->in_reset))
 346                 str = "In reset";
 347         else if (hdev->disabled)
 348                 str = "Malfunction";
 349         else
 350                 str = "Operational";
 351
 352         return sprintf(buf, "%s\n", str);
 353 }
 354
 355 static ssize_t write_open_cnt_show(struct device *dev,
 356                 struct device_attribute *attr, char *buf)
 357 {
 358         struct hl_device *hdev = dev_get_drvdata(dev);
 359
 360         return sprintf(buf, "%d\n", hdev->user_ctx ? 1 : 0);
 361 }
 362
 363 static ssize_t soft_reset_cnt_show(struct device *dev,
 364                 struct device_attribute *attr, char *buf)
 365 {
 366         struct hl_device *hdev = dev_get_drvdata(dev);
 367
 368         return sprintf(buf, "%d\n", hdev->soft_reset_cnt);
 369 }
 370
 371 static ssize_t hard_reset_cnt_show(struct device *dev,
 372                 struct device_attribute *attr, char *buf)
 373 {
 374         struct hl_device *hdev = dev_get_drvdata(dev);
 375
 376         return sprintf(buf, "%d\n", hdev->hard_reset_cnt);
 377 }
 378
 379 static ssize_t max_power_show(struct device *dev, struct device_attribute *attr,
 380                                 char *buf)
 381 {
 382         struct hl_device *hdev = dev_get_drvdata(dev);
 383         long val;
 384
 385         if (hl_device_disabled_or_in_reset(hdev))
 386                 return -ENODEV;
 387
 388         val = hl_get_max_power(hdev);
 389
 390         return sprintf(buf, "%lu\n", val);
 391 }
 392
 393 static ssize_t max_power_store(struct device *dev,
 394                 struct device_attribute *attr, const char *buf, size_t count)
 395 {
 396         struct hl_device *hdev = dev_get_drvdata(dev);
 397         unsigned long value;
 398         int rc;
 399
 400         if (hl_device_disabled_or_in_reset(hdev)) {
 401                 count = -ENODEV;
 402                 goto out;
 403         }
 404
 405         rc = kstrtoul(buf, 0, &value);
 406
 407         if (rc) {
 408                 count = -EINVAL;
 409                 goto out;
 410         }
 411
 412         hdev->max_power = value;
 413         hl_set_max_power(hdev, value);
 414
 415 out:
 416         return count;
 417 }
 418
 419 static ssize_t eeprom_read_handler(struct file *filp, struct kobject *kobj,
 420                         struct bin_attribute *attr, char *buf, loff_t offset,
 421                         size_t max_size)
 422 {
 423         struct device *dev = container_of(kobj, struct device, kobj);
 424         struct hl_device *hdev = dev_get_drvdata(dev);
 425         char *data;
 426         int rc;
 427
 428         if (!max_size)
 429                 return -EINVAL;
 430
 431         data = kzalloc(max_size, GFP_KERNEL);
 432         if (!data)
 433                 return -ENOMEM;
 434
 435         rc = hdev->asic_funcs->get_eeprom_data(hdev, data, max_size);
 436         if (rc)
 437                 goto out;
 438
 439         memcpy(buf, data, max_size);
 440
 441 out:
 442         kfree(data);
 443
 444         return max_size;
 445 }
 446
 447 static DEVICE_ATTR_RO(armcp_kernel_ver);
 448 static DEVICE_ATTR_RO(armcp_ver);
 449 static DEVICE_ATTR_RO(cpld_ver);
 450 static DEVICE_ATTR_RO(device_type);
 451 static DEVICE_ATTR_RO(fuse_ver);
 452 static DEVICE_ATTR_WO(hard_reset);
 453 static DEVICE_ATTR_RO(hard_reset_cnt);
 454 static DEVICE_ATTR_RW(high_pll);
 455 static DEVICE_ATTR_RO(infineon_ver);
 456 static DEVICE_ATTR_RW(max_power);
 457 static DEVICE_ATTR_RO(pci_addr);
 458 static DEVICE_ATTR_RW(pm_mng_profile);
 459 static DEVICE_ATTR_RO(preboot_btl_ver);
 460 static DEVICE_ATTR_WO(soft_reset);
 461 static DEVICE_ATTR_RO(soft_reset_cnt);
 462 static DEVICE_ATTR_RO(status);
 463 static DEVICE_ATTR_RO(thermal_ver);
 464 static DEVICE_ATTR_RO(uboot_ver);
 465 static DEVICE_ATTR_RO(write_open_cnt);
 466
 467 static struct bin_attribute bin_attr_eeprom = {
 468         .attr = {.name = "eeprom", .mode = (0444)},
 469         .size = PAGE_SIZE,
 470         .read = eeprom_read_handler
 471 };
 472
 473 static struct attribute *hl_dev_attrs[] = {
 474         &dev_attr_armcp_kernel_ver.attr,
 475         &dev_attr_armcp_ver.attr,
 476         &dev_attr_cpld_ver.attr,
 477         &dev_attr_device_type.attr,
 478         &dev_attr_fuse_ver.attr,
 479         &dev_attr_hard_reset.attr,
 480         &dev_attr_hard_reset_cnt.attr,
 481         &dev_attr_high_pll.attr,
 482         &dev_attr_infineon_ver.attr,
 483         &dev_attr_max_power.attr,
 484         &dev_attr_pci_addr.attr,
 485         &dev_attr_pm_mng_profile.attr,
 486         &dev_attr_preboot_btl_ver.attr,
 487         &dev_attr_soft_reset.attr,
 488         &dev_attr_soft_reset_cnt.attr,
 489         &dev_attr_status.attr,
 490         &dev_attr_thermal_ver.attr,
 491         &dev_attr_uboot_ver.attr,
 492         &dev_attr_write_open_cnt.attr,
 493         NULL,
 494 };
 495
 496 static struct bin_attribute *hl_dev_bin_attrs[] = {
 497         &bin_attr_eeprom,
 498         NULL
 499 };
 500
 501 static struct attribute_group hl_dev_attr_group = {
 502         .attrs = hl_dev_attrs,
 503         .bin_attrs = hl_dev_bin_attrs,
 504 };
 505
 506 static struct attribute_group hl_dev_clks_attr_group;
 507
 508 static const struct attribute_group *hl_dev_attr_groups[] = {
 509         &hl_dev_attr_group,
 510         &hl_dev_clks_attr_group,
 511         NULL,
 512 };
 513
 514 int hl_sysfs_init(struct hl_device *hdev)
 515 {
 516         int rc;
 517
 518         hdev->pm_mng_profile = PM_AUTO;
 519         hdev->max_power = hdev->asic_prop.max_power_default;
 520
 521         hdev->asic_funcs->add_device_attr(hdev, &hl_dev_clks_attr_group);
 522
 523         rc = device_add_groups(hdev->dev, hl_dev_attr_groups);
 524         if (rc) {
 525                 dev_err(hdev->dev,
 526                         "Failed to add groups to device, error %d\n", rc);
 527                 return rc;
 528         }
 529
 530         return 0;
 531 }
 532
 533 void hl_sysfs_fini(struct hl_device *hdev)
 534 {
 535         device_remove_groups(hdev->dev, hl_dev_attr_groups);
 536 }