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 = cpu_to_le32(ARMCP_PACKET_FREQUENCY_CURR_GET <<
  25                                                 ARMCP_PKT_CTL_OPCODE_SHIFT);
  26         else
  27                 pkt.ctl = cpu_to_le32(ARMCP_PACKET_FREQUENCY_GET <<
  28                                                 ARMCP_PKT_CTL_OPCODE_SHIFT);
  29         pkt.pll_index = cpu_to_le32(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 = cpu_to_le32(ARMCP_PACKET_FREQUENCY_SET <<
  52                                         ARMCP_PKT_CTL_OPCODE_SHIFT);
  53         pkt.pll_index = cpu_to_le32(pll_index);
  54         pkt.value = cpu_to_le64(freq);
  55
  56         rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
  57                                         SET_CLK_PKT_TIMEOUT, NULL);
  58
  59         if (rc)
  60                 dev_err(hdev->dev,
  61                         "Failed to set frequency to PLL %d, error %d\n",
  62                         pll_index, rc);
  63 }
  64
  65 u64 hl_get_max_power(struct hl_device *hdev)
  66 {
  67         struct armcp_packet pkt;
  68         long result;
  69         int rc;
  70
  71         memset(&pkt, 0, sizeof(pkt));
  72
  73         pkt.ctl = cpu_to_le32(ARMCP_PACKET_MAX_POWER_GET <<
  74                                 ARMCP_PKT_CTL_OPCODE_SHIFT);
  75
  76         rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
  77                                                 SET_PWR_PKT_TIMEOUT, &result);
  78
  79         if (rc) {
  80                 dev_err(hdev->dev, "Failed to get max power, error %d\n", rc);
  81                 result = rc;
  82         }
  83
  84         return result;
  85 }
  86
  87 void hl_set_max_power(struct hl_device *hdev, u64 value)
  88 {
  89         struct armcp_packet pkt;
  90         int rc;
  91
  92         memset(&pkt, 0, sizeof(pkt));
  93
  94         pkt.ctl = cpu_to_le32(ARMCP_PACKET_MAX_POWER_SET <<
  95                                 ARMCP_PKT_CTL_OPCODE_SHIFT);
  96         pkt.value = cpu_to_le64(value);
  97
  98         rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
  99                                         SET_PWR_PKT_TIMEOUT, NULL);
 100
 101         if (rc)
 102                 dev_err(hdev->dev, "Failed to set max power, error %d\n", rc);
 103 }
 104
 105 static ssize_t uboot_ver_show(struct device *dev, struct device_attribute *attr,
 106                                 char *buf)
 107 {
 108         struct hl_device *hdev = dev_get_drvdata(dev);
 109
 110         return sprintf(buf, "%s\n", hdev->asic_prop.uboot_ver);
 111 }
 112
 113 static ssize_t armcp_kernel_ver_show(struct device *dev,
 114                                 struct device_attribute *attr, char *buf)
 115 {
 116         struct hl_device *hdev = dev_get_drvdata(dev);
 117
 118         return sprintf(buf, "%s", hdev->asic_prop.armcp_info.kernel_version);
 119 }
 120
 121 static ssize_t armcp_ver_show(struct device *dev, struct device_attribute *attr,
 122                                 char *buf)
 123 {
 124         struct hl_device *hdev = dev_get_drvdata(dev);
 125
 126         return sprintf(buf, "%s\n", hdev->asic_prop.armcp_info.armcp_version);
 127 }
 128
 129 static ssize_t cpld_ver_show(struct device *dev, struct device_attribute *attr,
 130                                 char *buf)
 131 {
 132         struct hl_device *hdev = dev_get_drvdata(dev);
 133
 134         return sprintf(buf, "0x%08x\n",
 135                         hdev->asic_prop.armcp_info.cpld_version);
 136 }
 137
 138 static ssize_t infineon_ver_show(struct device *dev,
 139                                 struct device_attribute *attr, char *buf)
 140 {
 141         struct hl_device *hdev = dev_get_drvdata(dev);
 142
 143         return sprintf(buf, "0x%04x\n",
 144                         hdev->asic_prop.armcp_info.infineon_version);
 145 }
 146
 147 static ssize_t fuse_ver_show(struct device *dev, struct device_attribute *attr,
 148                                 char *buf)
 149 {
 150         struct hl_device *hdev = dev_get_drvdata(dev);
 151
 152         return sprintf(buf, "%s\n", hdev->asic_prop.armcp_info.fuse_version);
 153 }
 154
 155 static ssize_t thermal_ver_show(struct device *dev,
 156                                 struct device_attribute *attr, char *buf)
 157 {
 158         struct hl_device *hdev = dev_get_drvdata(dev);
 159
 160         return sprintf(buf, "%s", hdev->asic_prop.armcp_info.thermal_version);
 161 }
 162
 163 static ssize_t preboot_btl_ver_show(struct device *dev,
 164                                 struct device_attribute *attr, char *buf)
 165 {
 166         struct hl_device *hdev = dev_get_drvdata(dev);
 167
 168         return sprintf(buf, "%s\n", hdev->asic_prop.preboot_ver);
 169 }
 170
 171 static ssize_t soft_reset_store(struct device *dev,
 172                                 struct device_attribute *attr, const char *buf,
 173                                 size_t count)
 174 {
 175         struct hl_device *hdev = dev_get_drvdata(dev);
 176         long value;
 177         int rc;
 178
 179         rc = kstrtoul(buf, 0, &value);
 180
 181         if (rc) {
 182                 count = -EINVAL;
 183                 goto out;
 184         }
 185
 186         if (!hdev->supports_soft_reset) {
 187                 dev_err(hdev->dev, "Device does not support soft-reset\n");
 188                 goto out;
 189         }
 190
 191         dev_warn(hdev->dev, "Soft-Reset requested through sysfs\n");
 192
 193         hl_device_reset(hdev, false, false);
 194
 195 out:
 196         return count;
 197 }
 198
 199 static ssize_t hard_reset_store(struct device *dev,
 200                                 struct device_attribute *attr,
 201                                 const char *buf, size_t count)
 202 {
 203         struct hl_device *hdev = dev_get_drvdata(dev);
 204         long value;
 205         int rc;
 206
 207         rc = kstrtoul(buf, 0, &value);
 208
 209         if (rc) {
 210                 count = -EINVAL;
 211                 goto out;
 212         }
 213
 214         dev_warn(hdev->dev, "Hard-Reset requested through sysfs\n");
 215
 216         hl_device_reset(hdev, true, false);
 217
 218 out:
 219         return count;
 220 }
 221
 222 static ssize_t device_type_show(struct device *dev,
 223                 struct device_attribute *attr, char *buf)
 224 {
 225         struct hl_device *hdev = dev_get_drvdata(dev);
 226         char *str;
 227
 228         switch (hdev->asic_type) {
 229         case ASIC_GOYA:
 230                 str = "GOYA";
 231                 break;
 232         case ASIC_GAUDI:
 233                 str = "GAUDI";
 234                 break;
 235         default:
 236                 dev_err(hdev->dev, "Unrecognized ASIC type %d\n",
 237                                 hdev->asic_type);
 238                 return -EINVAL;
 239         }
 240
 241         return sprintf(buf, "%s\n", str);
 242 }
 243
 244 static ssize_t pci_addr_show(struct device *dev, struct device_attribute *attr,
 245                                 char *buf)
 246 {
 247         struct hl_device *hdev = dev_get_drvdata(dev);
 248
 249         return sprintf(buf, "%04x:%02x:%02x.%x\n",
 250                         pci_domain_nr(hdev->pdev->bus),
 251                         hdev->pdev->bus->number,
 252                         PCI_SLOT(hdev->pdev->devfn),
 253                         PCI_FUNC(hdev->pdev->devfn));
 254 }
 255
 256 static ssize_t status_show(struct device *dev, struct device_attribute *attr,
 257                                 char *buf)
 258 {
 259         struct hl_device *hdev = dev_get_drvdata(dev);
 260         char *str;
 261
 262         if (atomic_read(&hdev->in_reset))
 263                 str = "In reset";
 264         else if (hdev->disabled)
 265                 str = "Malfunction";
 266         else
 267                 str = "Operational";
 268
 269         return sprintf(buf, "%s\n", str);
 270 }
 271
 272 static ssize_t soft_reset_cnt_show(struct device *dev,
 273                 struct device_attribute *attr, char *buf)
 274 {
 275         struct hl_device *hdev = dev_get_drvdata(dev);
 276
 277         return sprintf(buf, "%d\n", hdev->soft_reset_cnt);
 278 }
 279
 280 static ssize_t hard_reset_cnt_show(struct device *dev,
 281                 struct device_attribute *attr, char *buf)
 282 {
 283         struct hl_device *hdev = dev_get_drvdata(dev);
 284
 285         return sprintf(buf, "%d\n", hdev->hard_reset_cnt);
 286 }
 287
 288 static ssize_t max_power_show(struct device *dev, struct device_attribute *attr,
 289                                 char *buf)
 290 {
 291         struct hl_device *hdev = dev_get_drvdata(dev);
 292         long val;
 293
 294         if (hl_device_disabled_or_in_reset(hdev))
 295                 return -ENODEV;
 296
 297         val = hl_get_max_power(hdev);
 298
 299         return sprintf(buf, "%lu\n", val);
 300 }
 301
 302 static ssize_t max_power_store(struct device *dev,
 303                 struct device_attribute *attr, const char *buf, size_t count)
 304 {
 305         struct hl_device *hdev = dev_get_drvdata(dev);
 306         unsigned long value;
 307         int rc;
 308
 309         if (hl_device_disabled_or_in_reset(hdev)) {
 310                 count = -ENODEV;
 311                 goto out;
 312         }
 313
 314         rc = kstrtoul(buf, 0, &value);
 315
 316         if (rc) {
 317                 count = -EINVAL;
 318                 goto out;
 319         }
 320
 321         hdev->max_power = value;
 322         hl_set_max_power(hdev, value);
 323
 324 out:
 325         return count;
 326 }
 327
 328 static ssize_t eeprom_read_handler(struct file *filp, struct kobject *kobj,
 329                         struct bin_attribute *attr, char *buf, loff_t offset,
 330                         size_t max_size)
 331 {
 332         struct device *dev = container_of(kobj, struct device, kobj);
 333         struct hl_device *hdev = dev_get_drvdata(dev);
 334         char *data;
 335         int rc;
 336
 337         if (!max_size)
 338                 return -EINVAL;
 339
 340         data = kzalloc(max_size, GFP_KERNEL);
 341         if (!data)
 342                 return -ENOMEM;
 343
 344         rc = hdev->asic_funcs->get_eeprom_data(hdev, data, max_size);
 345         if (rc)
 346                 goto out;
 347
 348         memcpy(buf, data, max_size);
 349
 350 out:
 351         kfree(data);
 352
 353         return max_size;
 354 }
 355
 356 static DEVICE_ATTR_RO(armcp_kernel_ver);
 357 static DEVICE_ATTR_RO(armcp_ver);
 358 static DEVICE_ATTR_RO(cpld_ver);
 359 static DEVICE_ATTR_RO(device_type);
 360 static DEVICE_ATTR_RO(fuse_ver);
 361 static DEVICE_ATTR_WO(hard_reset);
 362 static DEVICE_ATTR_RO(hard_reset_cnt);
 363 static DEVICE_ATTR_RO(infineon_ver);
 364 static DEVICE_ATTR_RW(max_power);
 365 static DEVICE_ATTR_RO(pci_addr);
 366 static DEVICE_ATTR_RO(preboot_btl_ver);
 367 static DEVICE_ATTR_WO(soft_reset);
 368 static DEVICE_ATTR_RO(soft_reset_cnt);
 369 static DEVICE_ATTR_RO(status);
 370 static DEVICE_ATTR_RO(thermal_ver);
 371 static DEVICE_ATTR_RO(uboot_ver);
 372
 373 static struct bin_attribute bin_attr_eeprom = {
 374         .attr = {.name = "eeprom", .mode = (0444)},
 375         .size = PAGE_SIZE,
 376         .read = eeprom_read_handler
 377 };
 378
 379 static struct attribute *hl_dev_attrs[] = {
 380         &dev_attr_armcp_kernel_ver.attr,
 381         &dev_attr_armcp_ver.attr,
 382         &dev_attr_cpld_ver.attr,
 383         &dev_attr_device_type.attr,
 384         &dev_attr_fuse_ver.attr,
 385         &dev_attr_hard_reset.attr,
 386         &dev_attr_hard_reset_cnt.attr,
 387         &dev_attr_infineon_ver.attr,
 388         &dev_attr_max_power.attr,
 389         &dev_attr_pci_addr.attr,
 390         &dev_attr_preboot_btl_ver.attr,
 391         &dev_attr_soft_reset.attr,
 392         &dev_attr_soft_reset_cnt.attr,
 393         &dev_attr_status.attr,
 394         &dev_attr_thermal_ver.attr,
 395         &dev_attr_uboot_ver.attr,
 396         NULL,
 397 };
 398
 399 static struct bin_attribute *hl_dev_bin_attrs[] = {
 400         &bin_attr_eeprom,
 401         NULL
 402 };
 403
 404 static struct attribute_group hl_dev_attr_group = {
 405         .attrs = hl_dev_attrs,
 406         .bin_attrs = hl_dev_bin_attrs,
 407 };
 408
 409 static struct attribute_group hl_dev_clks_attr_group;
 410
 411 static const struct attribute_group *hl_dev_attr_groups[] = {
 412         &hl_dev_attr_group,
 413         &hl_dev_clks_attr_group,
 414         NULL,
 415 };
 416
 417 int hl_sysfs_init(struct hl_device *hdev)
 418 {
 419         int rc;
 420
 421         if (hdev->asic_type == ASIC_GOYA)
 422                 hdev->pm_mng_profile = PM_AUTO;
 423         else
 424                 hdev->pm_mng_profile = PM_MANUAL;
 425         hdev->max_power = hdev->asic_prop.max_power_default;
 426
 427         hdev->asic_funcs->add_device_attr(hdev, &hl_dev_clks_attr_group);
 428
 429         rc = device_add_groups(hdev->dev, hl_dev_attr_groups);
 430         if (rc) {
 431                 dev_err(hdev->dev,
 432                         "Failed to add groups to device, error %d\n", rc);
 433                 return rc;
 434         }
 435
 436         return 0;
 437 }
 438
 439 void hl_sysfs_fini(struct hl_device *hdev)
 440 {
 441         device_remove_groups(hdev->dev, hl_dev_attr_groups);
 442 }