drivers/misc/habanalabs/goya/goya_hwmgr.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 /*
   4  * Copyright 2016-2019 HabanaLabs, Ltd.
   5  * All Rights Reserved.
   6  */
   7
   8 #include "goyaP.h"
   9
  10 void goya_set_pll_profile(struct hl_device *hdev, enum hl_pll_frequency freq)
  11 {
  12         struct goya_device *goya = hdev->asic_specific;
  13
  14         switch (freq) {
  15         case PLL_HIGH:
  16                 hl_set_frequency(hdev, MME_PLL, hdev->high_pll);
  17                 hl_set_frequency(hdev, TPC_PLL, hdev->high_pll);
  18                 hl_set_frequency(hdev, IC_PLL, hdev->high_pll);
  19                 break;
  20         case PLL_LOW:
  21                 hl_set_frequency(hdev, MME_PLL, GOYA_PLL_FREQ_LOW);
  22                 hl_set_frequency(hdev, TPC_PLL, GOYA_PLL_FREQ_LOW);
  23                 hl_set_frequency(hdev, IC_PLL, GOYA_PLL_FREQ_LOW);
  24                 break;
  25         case PLL_LAST:
  26                 hl_set_frequency(hdev, MME_PLL, goya->mme_clk);
  27                 hl_set_frequency(hdev, TPC_PLL, goya->tpc_clk);
  28                 hl_set_frequency(hdev, IC_PLL, goya->ic_clk);
  29                 break;
  30         default:
  31                 dev_err(hdev->dev, "unknown frequency setting\n");
  32         }
  33 }
  34
  35 int goya_get_clk_rate(struct hl_device *hdev, u32 *cur_clk, u32 *max_clk)
  36 {
  37         long value;
  38
  39         if (!hl_device_operational(hdev, NULL))
  40                 return -ENODEV;
  41
  42         value = hl_get_frequency(hdev, MME_PLL, false);
  43
  44         if (value < 0) {
  45                 dev_err(hdev->dev, "Failed to retrieve device max clock %ld\n",
  46                         value);
  47                 return value;
  48         }
  49
  50         *max_clk = (value / 1000 / 1000);
  51
  52         value = hl_get_frequency(hdev, MME_PLL, true);
  53
  54         if (value < 0) {
  55                 dev_err(hdev->dev,
  56                         "Failed to retrieve device current clock %ld\n",
  57                         value);
  58                 return value;
  59         }
  60
  61         *cur_clk = (value / 1000 / 1000);
  62
  63         return 0;
  64 }
  65
  66 static ssize_t mme_clk_show(struct device *dev, struct device_attribute *attr,
  67                                 char *buf)
  68 {
  69         struct hl_device *hdev = dev_get_drvdata(dev);
  70         long value;
  71
  72         if (!hl_device_operational(hdev, NULL))
  73                 return -ENODEV;
  74
  75         value = hl_get_frequency(hdev, MME_PLL, false);
  76
  77         if (value < 0)
  78                 return value;
  79
  80         return sprintf(buf, "%lu\n", value);
  81 }
  82
  83 static ssize_t mme_clk_store(struct device *dev, struct device_attribute *attr,
  84                                 const char *buf, size_t count)
  85 {
  86         struct hl_device *hdev = dev_get_drvdata(dev);
  87         struct goya_device *goya = hdev->asic_specific;
  88         int rc;
  89         long value;
  90
  91         if (!hl_device_operational(hdev, NULL)) {
  92                 count = -ENODEV;
  93                 goto fail;
  94         }
  95
  96         if (hdev->pm_mng_profile == PM_AUTO) {
  97                 count = -EPERM;
  98                 goto fail;
  99         }
 100
 101         rc = kstrtoul(buf, 0, &value);
 102
 103         if (rc) {
 104                 count = -EINVAL;
 105                 goto fail;
 106         }
 107
 108         hl_set_frequency(hdev, MME_PLL, value);
 109         goya->mme_clk = value;
 110
 111 fail:
 112         return count;
 113 }
 114
 115 static ssize_t tpc_clk_show(struct device *dev, struct device_attribute *attr,
 116                                 char *buf)
 117 {
 118         struct hl_device *hdev = dev_get_drvdata(dev);
 119         long value;
 120
 121         if (!hl_device_operational(hdev, NULL))
 122                 return -ENODEV;
 123
 124         value = hl_get_frequency(hdev, TPC_PLL, false);
 125
 126         if (value < 0)
 127                 return value;
 128
 129         return sprintf(buf, "%lu\n", value);
 130 }
 131
 132 static ssize_t tpc_clk_store(struct device *dev, struct device_attribute *attr,
 133                                 const char *buf, size_t count)
 134 {
 135         struct hl_device *hdev = dev_get_drvdata(dev);
 136         struct goya_device *goya = hdev->asic_specific;
 137         int rc;
 138         long value;
 139
 140         if (!hl_device_operational(hdev, NULL)) {
 141                 count = -ENODEV;
 142                 goto fail;
 143         }
 144
 145         if (hdev->pm_mng_profile == PM_AUTO) {
 146                 count = -EPERM;
 147                 goto fail;
 148         }
 149
 150         rc = kstrtoul(buf, 0, &value);
 151
 152         if (rc) {
 153                 count = -EINVAL;
 154                 goto fail;
 155         }
 156
 157         hl_set_frequency(hdev, TPC_PLL, value);
 158         goya->tpc_clk = value;
 159
 160 fail:
 161         return count;
 162 }
 163
 164 static ssize_t ic_clk_show(struct device *dev, struct device_attribute *attr,
 165                                 char *buf)
 166 {
 167         struct hl_device *hdev = dev_get_drvdata(dev);
 168         long value;
 169
 170         if (!hl_device_operational(hdev, NULL))
 171                 return -ENODEV;
 172
 173         value = hl_get_frequency(hdev, IC_PLL, false);
 174
 175         if (value < 0)
 176                 return value;
 177
 178         return sprintf(buf, "%lu\n", value);
 179 }
 180
 181 static ssize_t ic_clk_store(struct device *dev, struct device_attribute *attr,
 182                                 const char *buf, size_t count)
 183 {
 184         struct hl_device *hdev = dev_get_drvdata(dev);
 185         struct goya_device *goya = hdev->asic_specific;
 186         int rc;
 187         long value;
 188
 189         if (!hl_device_operational(hdev, NULL)) {
 190                 count = -ENODEV;
 191                 goto fail;
 192         }
 193
 194         if (hdev->pm_mng_profile == PM_AUTO) {
 195                 count = -EPERM;
 196                 goto fail;
 197         }
 198
 199         rc = kstrtoul(buf, 0, &value);
 200
 201         if (rc) {
 202                 count = -EINVAL;
 203                 goto fail;
 204         }
 205
 206         hl_set_frequency(hdev, IC_PLL, value);
 207         goya->ic_clk = value;
 208
 209 fail:
 210         return count;
 211 }
 212
 213 static ssize_t mme_clk_curr_show(struct device *dev,
 214                                 struct device_attribute *attr, char *buf)
 215 {
 216         struct hl_device *hdev = dev_get_drvdata(dev);
 217         long value;
 218
 219         if (!hl_device_operational(hdev, NULL))
 220                 return -ENODEV;
 221
 222         value = hl_get_frequency(hdev, MME_PLL, true);
 223
 224         if (value < 0)
 225                 return value;
 226
 227         return sprintf(buf, "%lu\n", value);
 228 }
 229
 230 static ssize_t tpc_clk_curr_show(struct device *dev,
 231                                 struct device_attribute *attr, char *buf)
 232 {
 233         struct hl_device *hdev = dev_get_drvdata(dev);
 234         long value;
 235
 236         if (!hl_device_operational(hdev, NULL))
 237                 return -ENODEV;
 238
 239         value = hl_get_frequency(hdev, TPC_PLL, true);
 240
 241         if (value < 0)
 242                 return value;
 243
 244         return sprintf(buf, "%lu\n", value);
 245 }
 246
 247 static ssize_t ic_clk_curr_show(struct device *dev,
 248                                 struct device_attribute *attr, char *buf)
 249 {
 250         struct hl_device *hdev = dev_get_drvdata(dev);
 251         long value;
 252
 253         if (!hl_device_operational(hdev, NULL))
 254                 return -ENODEV;
 255
 256         value = hl_get_frequency(hdev, IC_PLL, true);
 257
 258         if (value < 0)
 259                 return value;
 260
 261         return sprintf(buf, "%lu\n", value);
 262 }
 263
 264 static ssize_t pm_mng_profile_show(struct device *dev,
 265                                 struct device_attribute *attr, char *buf)
 266 {
 267         struct hl_device *hdev = dev_get_drvdata(dev);
 268
 269         if (!hl_device_operational(hdev, NULL))
 270                 return -ENODEV;
 271
 272         return sprintf(buf, "%s\n",
 273                         (hdev->pm_mng_profile == PM_AUTO) ? "auto" :
 274                         (hdev->pm_mng_profile == PM_MANUAL) ? "manual" :
 275                         "unknown");
 276 }
 277
 278 static ssize_t pm_mng_profile_store(struct device *dev,
 279                 struct device_attribute *attr, const char *buf, size_t count)
 280 {
 281         struct hl_device *hdev = dev_get_drvdata(dev);
 282
 283         if (!hl_device_operational(hdev, NULL)) {
 284                 count = -ENODEV;
 285                 goto out;
 286         }
 287
 288         mutex_lock(&hdev->fpriv_list_lock);
 289
 290         if (hdev->compute_ctx) {
 291                 dev_err(hdev->dev,
 292                         "Can't change PM profile while compute context is opened on the device\n");
 293                 count = -EPERM;
 294                 goto unlock_mutex;
 295         }
 296
 297         if (strncmp("auto", buf, strlen("auto")) == 0) {
 298                 /* Make sure we are in LOW PLL when changing modes */
 299                 if (hdev->pm_mng_profile == PM_MANUAL) {
 300                         hdev->curr_pll_profile = PLL_HIGH;
 301                         hdev->pm_mng_profile = PM_AUTO;
 302                         hl_device_set_frequency(hdev, PLL_LOW);
 303                 }
 304         } else if (strncmp("manual", buf, strlen("manual")) == 0) {
 305                 if (hdev->pm_mng_profile == PM_AUTO) {
 306                         /* Must release the lock because the work thread also
 307                          * takes this lock. But before we release it, set
 308                          * the mode to manual so nothing will change if a user
 309                          * suddenly opens the device
 310                          */
 311                         hdev->pm_mng_profile = PM_MANUAL;
 312
 313                         mutex_unlock(&hdev->fpriv_list_lock);
 314
 315                         /* Flush the current work so we can return to the user
 316                          * knowing that he is the only one changing frequencies
 317                          */
 318                         flush_delayed_work(&hdev->work_freq);
 319
 320                         return count;
 321                 }
 322         } else {
 323                 dev_err(hdev->dev, "value should be auto or manual\n");
 324                 count = -EINVAL;
 325         }
 326
 327 unlock_mutex:
 328         mutex_unlock(&hdev->fpriv_list_lock);
 329 out:
 330         return count;
 331 }
 332
 333 static ssize_t high_pll_show(struct device *dev, struct device_attribute *attr,
 334                                 char *buf)
 335 {
 336         struct hl_device *hdev = dev_get_drvdata(dev);
 337
 338         if (!hl_device_operational(hdev, NULL))
 339                 return -ENODEV;
 340
 341         return sprintf(buf, "%u\n", hdev->high_pll);
 342 }
 343
 344 static ssize_t high_pll_store(struct device *dev, struct device_attribute *attr,
 345                                 const char *buf, size_t count)
 346 {
 347         struct hl_device *hdev = dev_get_drvdata(dev);
 348         long value;
 349         int rc;
 350
 351         if (!hl_device_operational(hdev, NULL)) {
 352                 count = -ENODEV;
 353                 goto out;
 354         }
 355
 356         rc = kstrtoul(buf, 0, &value);
 357
 358         if (rc) {
 359                 count = -EINVAL;
 360                 goto out;
 361         }
 362
 363         hdev->high_pll = value;
 364
 365 out:
 366         return count;
 367 }
 368
 369 static DEVICE_ATTR_RW(high_pll);
 370 static DEVICE_ATTR_RW(ic_clk);
 371 static DEVICE_ATTR_RO(ic_clk_curr);
 372 static DEVICE_ATTR_RW(mme_clk);
 373 static DEVICE_ATTR_RO(mme_clk_curr);
 374 static DEVICE_ATTR_RW(pm_mng_profile);
 375 static DEVICE_ATTR_RW(tpc_clk);
 376 static DEVICE_ATTR_RO(tpc_clk_curr);
 377
 378 static struct attribute *goya_dev_attrs[] = {
 379         &dev_attr_high_pll.attr,
 380         &dev_attr_ic_clk.attr,
 381         &dev_attr_ic_clk_curr.attr,
 382         &dev_attr_mme_clk.attr,
 383         &dev_attr_mme_clk_curr.attr,
 384         &dev_attr_pm_mng_profile.attr,
 385         &dev_attr_tpc_clk.attr,
 386         &dev_attr_tpc_clk_curr.attr,
 387         NULL,
 388 };
 389
 390 void goya_add_device_attr(struct hl_device *hdev,
 391                         struct attribute_group *dev_attr_grp)
 392 {
 393         dev_attr_grp->attrs = goya_dev_attrs;
 394 }