drivers/misc/habanalabs/goya/goya_hwmgr.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 /*
   4  * Copyright 2016-2022 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         if (!hdev->pdev)
  15                 return;
  16
  17         switch (freq) {
  18         case PLL_HIGH:
  19                 hl_fw_set_frequency(hdev, HL_GOYA_MME_PLL, hdev->high_pll);
  20                 hl_fw_set_frequency(hdev, HL_GOYA_TPC_PLL, hdev->high_pll);
  21                 hl_fw_set_frequency(hdev, HL_GOYA_IC_PLL, hdev->high_pll);
  22                 break;
  23         case PLL_LOW:
  24                 hl_fw_set_frequency(hdev, HL_GOYA_MME_PLL, GOYA_PLL_FREQ_LOW);
  25                 hl_fw_set_frequency(hdev, HL_GOYA_TPC_PLL, GOYA_PLL_FREQ_LOW);
  26                 hl_fw_set_frequency(hdev, HL_GOYA_IC_PLL, GOYA_PLL_FREQ_LOW);
  27                 break;
  28         case PLL_LAST:
  29                 hl_fw_set_frequency(hdev, HL_GOYA_MME_PLL, goya->mme_clk);
  30                 hl_fw_set_frequency(hdev, HL_GOYA_TPC_PLL, goya->tpc_clk);
  31                 hl_fw_set_frequency(hdev, HL_GOYA_IC_PLL, goya->ic_clk);
  32                 break;
  33         default:
  34                 dev_err(hdev->dev, "unknown frequency setting\n");
  35         }
  36 }
  37
  38 static ssize_t mme_clk_show(struct device *dev, struct device_attribute *attr,
  39                                 char *buf)
  40 {
  41         struct hl_device *hdev = dev_get_drvdata(dev);
  42         long value;
  43
  44         if (!hl_device_operational(hdev, NULL))
  45                 return -ENODEV;
  46
  47         value = hl_fw_get_frequency(hdev, HL_GOYA_MME_PLL, false);
  48
  49         if (value < 0)
  50                 return value;
  51
  52         return sprintf(buf, "%lu\n", value);
  53 }
  54
  55 static ssize_t mme_clk_store(struct device *dev, struct device_attribute *attr,
  56                                 const char *buf, size_t count)
  57 {
  58         struct hl_device *hdev = dev_get_drvdata(dev);
  59         struct goya_device *goya = hdev->asic_specific;
  60         int rc;
  61         long value;
  62
  63         if (!hl_device_operational(hdev, NULL)) {
  64                 count = -ENODEV;
  65                 goto fail;
  66         }
  67
  68         if (goya->pm_mng_profile == PM_AUTO) {
  69                 count = -EPERM;
  70                 goto fail;
  71         }
  72
  73         rc = kstrtoul(buf, 0, &value);
  74
  75         if (rc) {
  76                 count = -EINVAL;
  77                 goto fail;
  78         }
  79
  80         hl_fw_set_frequency(hdev, HL_GOYA_MME_PLL, value);
  81         goya->mme_clk = value;
  82
  83 fail:
  84         return count;
  85 }
  86
  87 static ssize_t tpc_clk_show(struct device *dev, struct device_attribute *attr,
  88                                 char *buf)
  89 {
  90         struct hl_device *hdev = dev_get_drvdata(dev);
  91         long value;
  92
  93         if (!hl_device_operational(hdev, NULL))
  94                 return -ENODEV;
  95
  96         value = hl_fw_get_frequency(hdev, HL_GOYA_TPC_PLL, false);
  97
  98         if (value < 0)
  99                 return value;
 100
 101         return sprintf(buf, "%lu\n", value);
 102 }
 103
 104 static ssize_t tpc_clk_store(struct device *dev, struct device_attribute *attr,
 105                                 const char *buf, size_t count)
 106 {
 107         struct hl_device *hdev = dev_get_drvdata(dev);
 108         struct goya_device *goya = hdev->asic_specific;
 109         int rc;
 110         long value;
 111
 112         if (!hl_device_operational(hdev, NULL)) {
 113                 count = -ENODEV;
 114                 goto fail;
 115         }
 116
 117         if (goya->pm_mng_profile == PM_AUTO) {
 118                 count = -EPERM;
 119                 goto fail;
 120         }
 121
 122         rc = kstrtoul(buf, 0, &value);
 123
 124         if (rc) {
 125                 count = -EINVAL;
 126                 goto fail;
 127         }
 128
 129         hl_fw_set_frequency(hdev, HL_GOYA_TPC_PLL, value);
 130         goya->tpc_clk = value;
 131
 132 fail:
 133         return count;
 134 }
 135
 136 static ssize_t ic_clk_show(struct device *dev, struct device_attribute *attr,
 137                                 char *buf)
 138 {
 139         struct hl_device *hdev = dev_get_drvdata(dev);
 140         long value;
 141
 142         if (!hl_device_operational(hdev, NULL))
 143                 return -ENODEV;
 144
 145         value = hl_fw_get_frequency(hdev, HL_GOYA_IC_PLL, false);
 146
 147         if (value < 0)
 148                 return value;
 149
 150         return sprintf(buf, "%lu\n", value);
 151 }
 152
 153 static ssize_t ic_clk_store(struct device *dev, struct device_attribute *attr,
 154                                 const char *buf, size_t count)
 155 {
 156         struct hl_device *hdev = dev_get_drvdata(dev);
 157         struct goya_device *goya = hdev->asic_specific;
 158         int rc;
 159         long value;
 160
 161         if (!hl_device_operational(hdev, NULL)) {
 162                 count = -ENODEV;
 163                 goto fail;
 164         }
 165
 166         if (goya->pm_mng_profile == PM_AUTO) {
 167                 count = -EPERM;
 168                 goto fail;
 169         }
 170
 171         rc = kstrtoul(buf, 0, &value);
 172
 173         if (rc) {
 174                 count = -EINVAL;
 175                 goto fail;
 176         }
 177
 178         hl_fw_set_frequency(hdev, HL_GOYA_IC_PLL, value);
 179         goya->ic_clk = value;
 180
 181 fail:
 182         return count;
 183 }
 184
 185 static ssize_t mme_clk_curr_show(struct device *dev,
 186                                 struct device_attribute *attr, char *buf)
 187 {
 188         struct hl_device *hdev = dev_get_drvdata(dev);
 189         long value;
 190
 191         if (!hl_device_operational(hdev, NULL))
 192                 return -ENODEV;
 193
 194         value = hl_fw_get_frequency(hdev, HL_GOYA_MME_PLL, true);
 195
 196         if (value < 0)
 197                 return value;
 198
 199         return sprintf(buf, "%lu\n", value);
 200 }
 201
 202 static ssize_t tpc_clk_curr_show(struct device *dev,
 203                                 struct device_attribute *attr, char *buf)
 204 {
 205         struct hl_device *hdev = dev_get_drvdata(dev);
 206         long value;
 207
 208         if (!hl_device_operational(hdev, NULL))
 209                 return -ENODEV;
 210
 211         value = hl_fw_get_frequency(hdev, HL_GOYA_TPC_PLL, true);
 212
 213         if (value < 0)
 214                 return value;
 215
 216         return sprintf(buf, "%lu\n", value);
 217 }
 218
 219 static ssize_t ic_clk_curr_show(struct device *dev,
 220                                 struct device_attribute *attr, char *buf)
 221 {
 222         struct hl_device *hdev = dev_get_drvdata(dev);
 223         long value;
 224
 225         if (!hl_device_operational(hdev, NULL))
 226                 return -ENODEV;
 227
 228         value = hl_fw_get_frequency(hdev, HL_GOYA_IC_PLL, true);
 229
 230         if (value < 0)
 231                 return value;
 232
 233         return sprintf(buf, "%lu\n", value);
 234 }
 235
 236 static ssize_t pm_mng_profile_show(struct device *dev,
 237                                 struct device_attribute *attr, char *buf)
 238 {
 239         struct hl_device *hdev = dev_get_drvdata(dev);
 240         struct goya_device *goya = hdev->asic_specific;
 241
 242         if (!hl_device_operational(hdev, NULL))
 243                 return -ENODEV;
 244
 245         return sprintf(buf, "%s\n",
 246                         (goya->pm_mng_profile == PM_AUTO) ? "auto" :
 247                         (goya->pm_mng_profile == PM_MANUAL) ? "manual" :
 248                         "unknown");
 249 }
 250
 251 static ssize_t pm_mng_profile_store(struct device *dev,
 252                 struct device_attribute *attr, const char *buf, size_t count)
 253 {
 254         struct hl_device *hdev = dev_get_drvdata(dev);
 255         struct goya_device *goya = hdev->asic_specific;
 256
 257         if (!hl_device_operational(hdev, NULL)) {
 258                 count = -ENODEV;
 259                 goto out;
 260         }
 261
 262         mutex_lock(&hdev->fpriv_list_lock);
 263
 264         if (hdev->is_compute_ctx_active) {
 265                 dev_err(hdev->dev,
 266                         "Can't change PM profile while compute context is opened on the device\n");
 267                 count = -EPERM;
 268                 goto unlock_mutex;
 269         }
 270
 271         if (strncmp("auto", buf, strlen("auto")) == 0) {
 272                 /* Make sure we are in LOW PLL when changing modes */
 273                 if (goya->pm_mng_profile == PM_MANUAL) {
 274                         goya->curr_pll_profile = PLL_HIGH;
 275                         goya->pm_mng_profile = PM_AUTO;
 276                         goya_set_frequency(hdev, PLL_LOW);
 277                 }
 278         } else if (strncmp("manual", buf, strlen("manual")) == 0) {
 279                 if (goya->pm_mng_profile == PM_AUTO) {
 280                         /* Must release the lock because the work thread also
 281                          * takes this lock. But before we release it, set
 282                          * the mode to manual so nothing will change if a user
 283                          * suddenly opens the device
 284                          */
 285                         goya->pm_mng_profile = PM_MANUAL;
 286
 287                         mutex_unlock(&hdev->fpriv_list_lock);
 288
 289                         /* Flush the current work so we can return to the user
 290                          * knowing that he is the only one changing frequencies
 291                          */
 292                         if (goya->goya_work)
 293                                 flush_delayed_work(&goya->goya_work->work_freq);
 294
 295                         return count;
 296                 }
 297         } else {
 298                 dev_err(hdev->dev, "value should be auto or manual\n");
 299                 count = -EINVAL;
 300         }
 301
 302 unlock_mutex:
 303         mutex_unlock(&hdev->fpriv_list_lock);
 304 out:
 305         return count;
 306 }
 307
 308 static ssize_t high_pll_show(struct device *dev, struct device_attribute *attr,
 309                                 char *buf)
 310 {
 311         struct hl_device *hdev = dev_get_drvdata(dev);
 312
 313         if (!hl_device_operational(hdev, NULL))
 314                 return -ENODEV;
 315
 316         return sprintf(buf, "%u\n", hdev->high_pll);
 317 }
 318
 319 static ssize_t high_pll_store(struct device *dev, struct device_attribute *attr,
 320                                 const char *buf, size_t count)
 321 {
 322         struct hl_device *hdev = dev_get_drvdata(dev);
 323         long value;
 324         int rc;
 325
 326         if (!hl_device_operational(hdev, NULL)) {
 327                 count = -ENODEV;
 328                 goto out;
 329         }
 330
 331         rc = kstrtoul(buf, 0, &value);
 332
 333         if (rc) {
 334                 count = -EINVAL;
 335                 goto out;
 336         }
 337
 338         hdev->high_pll = value;
 339
 340 out:
 341         return count;
 342 }
 343
 344 static DEVICE_ATTR_RW(high_pll);
 345 static DEVICE_ATTR_RW(ic_clk);
 346 static DEVICE_ATTR_RO(ic_clk_curr);
 347 static DEVICE_ATTR_RW(mme_clk);
 348 static DEVICE_ATTR_RO(mme_clk_curr);
 349 static DEVICE_ATTR_RW(pm_mng_profile);
 350 static DEVICE_ATTR_RW(tpc_clk);
 351 static DEVICE_ATTR_RO(tpc_clk_curr);
 352
 353 static struct attribute *goya_dev_attrs[] = {
 354         &dev_attr_high_pll.attr,
 355         &dev_attr_ic_clk.attr,
 356         &dev_attr_ic_clk_curr.attr,
 357         &dev_attr_mme_clk.attr,
 358         &dev_attr_mme_clk_curr.attr,
 359         &dev_attr_pm_mng_profile.attr,
 360         &dev_attr_tpc_clk.attr,
 361         &dev_attr_tpc_clk_curr.attr,
 362         NULL,
 363 };
 364
 365 void goya_add_device_attr(struct hl_device *hdev,
 366                         struct attribute_group *dev_attr_grp)
 367 {
 368         dev_attr_grp->attrs = goya_dev_attrs;
 369 }