drivers/gpu/drm/msm/adreno/a6xx_gmu.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (c) 2017-2018 The Linux Foundation. All rights reserved. */
   3
   4 #include <linux/clk.h>
   5 #include <linux/interconnect.h>
   6 #include <linux/pm_domain.h>
   7 #include <linux/pm_opp.h>
   8 #include <soc/qcom/cmd-db.h>
   9
  10 #include "a6xx_gpu.h"
  11 #include "a6xx_gmu.xml.h"
  12
  13 static void a6xx_gmu_fault(struct a6xx_gmu *gmu)
  14 {
  15         struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
  16         struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
  17         struct msm_gpu *gpu = &adreno_gpu->base;
  18         struct drm_device *dev = gpu->dev;
  19         struct msm_drm_private *priv = dev->dev_private;
  20
  21         /* FIXME: add a banner here */
  22         gmu->hung = true;
  23
  24         /* Turn off the hangcheck timer while we are resetting */
  25         del_timer(&gpu->hangcheck_timer);
  26
  27         /* Queue the GPU handler because we need to treat this as a recovery */
  28         queue_work(priv->wq, &gpu->recover_work);
  29 }
  30
  31 static irqreturn_t a6xx_gmu_irq(int irq, void *data)
  32 {
  33         struct a6xx_gmu *gmu = data;
  34         u32 status;
  35
  36         status = gmu_read(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_STATUS);
  37         gmu_write(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_CLR, status);
  38
  39         if (status & A6XX_GMU_AO_HOST_INTERRUPT_STATUS_WDOG_BITE) {
  40                 dev_err_ratelimited(gmu->dev, "GMU watchdog expired\n");
  41
  42                 a6xx_gmu_fault(gmu);
  43         }
  44
  45         if (status &  A6XX_GMU_AO_HOST_INTERRUPT_STATUS_HOST_AHB_BUS_ERROR)
  46                 dev_err_ratelimited(gmu->dev, "GMU AHB bus error\n");
  47
  48         if (status & A6XX_GMU_AO_HOST_INTERRUPT_STATUS_FENCE_ERR)
  49                 dev_err_ratelimited(gmu->dev, "GMU fence error: 0x%x\n",
  50                         gmu_read(gmu, REG_A6XX_GMU_AHB_FENCE_STATUS));
  51
  52         return IRQ_HANDLED;
  53 }
  54
  55 static irqreturn_t a6xx_hfi_irq(int irq, void *data)
  56 {
  57         struct a6xx_gmu *gmu = data;
  58         u32 status;
  59
  60         status = gmu_read(gmu, REG_A6XX_GMU_GMU2HOST_INTR_INFO);
  61         gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_CLR, status);
  62
  63         if (status & A6XX_GMU_GMU2HOST_INTR_INFO_CM3_FAULT) {
  64                 dev_err_ratelimited(gmu->dev, "GMU firmware fault\n");
  65
  66                 a6xx_gmu_fault(gmu);
  67         }
  68
  69         return IRQ_HANDLED;
  70 }
  71
  72 bool a6xx_gmu_sptprac_is_on(struct a6xx_gmu *gmu)
  73 {
  74         u32 val;
  75
  76         /* This can be called from gpu state code so make sure GMU is valid */
  77         if (IS_ERR_OR_NULL(gmu->mmio))
  78                 return false;
  79
  80         val = gmu_read(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS);
  81
  82         return !(val &
  83                 (A6XX_GMU_SPTPRAC_PWR_CLK_STATUS_SPTPRAC_GDSC_POWER_OFF |
  84                 A6XX_GMU_SPTPRAC_PWR_CLK_STATUS_SP_CLOCK_OFF));
  85 }
  86
  87 /* Check to see if the GX rail is still powered */
  88 bool a6xx_gmu_gx_is_on(struct a6xx_gmu *gmu)
  89 {
  90         u32 val;
  91
  92         /* This can be called from gpu state code so make sure GMU is valid */
  93         if (IS_ERR_OR_NULL(gmu->mmio))
  94                 return false;
  95
  96         val = gmu_read(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS);
  97
  98         return !(val &
  99                 (A6XX_GMU_SPTPRAC_PWR_CLK_STATUS_GX_HM_GDSC_POWER_OFF |
 100                 A6XX_GMU_SPTPRAC_PWR_CLK_STATUS_GX_HM_CLK_OFF));
 101 }
 102
 103 static void __a6xx_gmu_set_freq(struct a6xx_gmu *gmu, int index)
 104 {
 105         struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
 106         struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
 107         struct msm_gpu *gpu = &adreno_gpu->base;
 108         int ret;
 109
 110         gmu_write(gmu, REG_A6XX_GMU_DCVS_ACK_OPTION, 0);
 111
 112         gmu_write(gmu, REG_A6XX_GMU_DCVS_PERF_SETTING,
 113                 ((3 & 0xf) << 28) | index);
 114
 115         /*
 116          * Send an invalid index as a vote for the bus bandwidth and let the
 117          * firmware decide on the right vote
 118          */
 119         gmu_write(gmu, REG_A6XX_GMU_DCVS_BW_SETTING, 0xff);
 120
 121         /* Set and clear the OOB for DCVS to trigger the GMU */
 122         a6xx_gmu_set_oob(gmu, GMU_OOB_DCVS_SET);
 123         a6xx_gmu_clear_oob(gmu, GMU_OOB_DCVS_SET);
 124
 125         ret = gmu_read(gmu, REG_A6XX_GMU_DCVS_RETURN);
 126         if (ret)
 127                 dev_err(gmu->dev, "GMU set GPU frequency error: %d\n", ret);
 128
 129         gmu->freq = gmu->gpu_freqs[index];
 130
 131         /*
 132          * Eventually we will want to scale the path vote with the frequency but
 133          * for now leave it at max so that the performance is nominal.
 134          */
 135         icc_set_bw(gpu->icc_path, 0, MBps_to_icc(7216));
 136 }
 137
 138 void a6xx_gmu_set_freq(struct msm_gpu *gpu, unsigned long freq)
 139 {
 140         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 141         struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu);
 142         struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
 143         u32 perf_index = 0;
 144
 145         if (freq == gmu->freq)
 146                 return;
 147
 148         for (perf_index = 0; perf_index < gmu->nr_gpu_freqs - 1; perf_index++)
 149                 if (freq == gmu->gpu_freqs[perf_index])
 150                         break;
 151
 152         __a6xx_gmu_set_freq(gmu, perf_index);
 153 }
 154
 155 unsigned long a6xx_gmu_get_freq(struct msm_gpu *gpu)
 156 {
 157         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 158         struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu);
 159         struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
 160
 161         return  gmu->freq;
 162 }
 163
 164 static bool a6xx_gmu_check_idle_level(struct a6xx_gmu *gmu)
 165 {
 166         u32 val;
 167         int local = gmu->idle_level;
 168
 169         /* SPTP and IFPC both report as IFPC */
 170         if (gmu->idle_level == GMU_IDLE_STATE_SPTP)
 171                 local = GMU_IDLE_STATE_IFPC;
 172
 173         val = gmu_read(gmu, REG_A6XX_GPU_GMU_CX_GMU_RPMH_POWER_STATE);
 174
 175         if (val == local) {
 176                 if (gmu->idle_level != GMU_IDLE_STATE_IFPC ||
 177                         !a6xx_gmu_gx_is_on(gmu))
 178                         return true;
 179         }
 180
 181         return false;
 182 }
 183
 184 /* Wait for the GMU to get to its most idle state */
 185 int a6xx_gmu_wait_for_idle(struct a6xx_gmu *gmu)
 186 {
 187         return spin_until(a6xx_gmu_check_idle_level(gmu));
 188 }
 189
 190 static int a6xx_gmu_start(struct a6xx_gmu *gmu)
 191 {
 192         int ret;
 193         u32 val;
 194
 195         gmu_write(gmu, REG_A6XX_GMU_CM3_SYSRESET, 1);
 196         gmu_write(gmu, REG_A6XX_GMU_CM3_SYSRESET, 0);
 197
 198         ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_CM3_FW_INIT_RESULT, val,
 199                 val == 0xbabeface, 100, 10000);
 200
 201         if (ret)
 202                 DRM_DEV_ERROR(gmu->dev, "GMU firmware initialization timed out\n");
 203
 204         return ret;
 205 }
 206
 207 static int a6xx_gmu_hfi_start(struct a6xx_gmu *gmu)
 208 {
 209         u32 val;
 210         int ret;
 211
 212         gmu_write(gmu, REG_A6XX_GMU_HFI_CTRL_INIT, 1);
 213
 214         ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_HFI_CTRL_STATUS, val,
 215                 val & 1, 100, 10000);
 216         if (ret)
 217                 DRM_DEV_ERROR(gmu->dev, "Unable to start the HFI queues\n");
 218
 219         return ret;
 220 }
 221
 222 /* Trigger a OOB (out of band) request to the GMU */
 223 int a6xx_gmu_set_oob(struct a6xx_gmu *gmu, enum a6xx_gmu_oob_state state)
 224 {
 225         int ret;
 226         u32 val;
 227         int request, ack;
 228         const char *name;
 229
 230         switch (state) {
 231         case GMU_OOB_GPU_SET:
 232                 request = GMU_OOB_GPU_SET_REQUEST;
 233                 ack = GMU_OOB_GPU_SET_ACK;
 234                 name = "GPU_SET";
 235                 break;
 236         case GMU_OOB_BOOT_SLUMBER:
 237                 request = GMU_OOB_BOOT_SLUMBER_REQUEST;
 238                 ack = GMU_OOB_BOOT_SLUMBER_ACK;
 239                 name = "BOOT_SLUMBER";
 240                 break;
 241         case GMU_OOB_DCVS_SET:
 242                 request = GMU_OOB_DCVS_REQUEST;
 243                 ack = GMU_OOB_DCVS_ACK;
 244                 name = "GPU_DCVS";
 245                 break;
 246         default:
 247                 return -EINVAL;
 248         }
 249
 250         /* Trigger the equested OOB operation */
 251         gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET, 1 << request);
 252
 253         /* Wait for the acknowledge interrupt */
 254         ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_GMU2HOST_INTR_INFO, val,
 255                 val & (1 << ack), 100, 10000);
 256
 257         if (ret)
 258                 DRM_DEV_ERROR(gmu->dev,
 259                         "Timeout waiting for GMU OOB set %s: 0x%x\n",
 260                                 name,
 261                                 gmu_read(gmu, REG_A6XX_GMU_GMU2HOST_INTR_INFO));
 262
 263         /* Clear the acknowledge interrupt */
 264         gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_CLR, 1 << ack);
 265
 266         return ret;
 267 }
 268
 269 /* Clear a pending OOB state in the GMU */
 270 void a6xx_gmu_clear_oob(struct a6xx_gmu *gmu, enum a6xx_gmu_oob_state state)
 271 {
 272         switch (state) {
 273         case GMU_OOB_GPU_SET:
 274                 gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET,
 275                         1 << GMU_OOB_GPU_SET_CLEAR);
 276                 break;
 277         case GMU_OOB_BOOT_SLUMBER:
 278                 gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET,
 279                         1 << GMU_OOB_BOOT_SLUMBER_CLEAR);
 280                 break;
 281         case GMU_OOB_DCVS_SET:
 282                 gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET,
 283                         1 << GMU_OOB_DCVS_CLEAR);
 284                 break;
 285         }
 286 }
 287
 288 /* Enable CPU control of SPTP power power collapse */
 289 static int a6xx_sptprac_enable(struct a6xx_gmu *gmu)
 290 {
 291         int ret;
 292         u32 val;
 293
 294         gmu_write(gmu, REG_A6XX_GMU_GX_SPTPRAC_POWER_CONTROL, 0x778000);
 295
 296         ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS, val,
 297                 (val & 0x38) == 0x28, 1, 100);
 298
 299         if (ret) {
 300                 DRM_DEV_ERROR(gmu->dev, "Unable to power on SPTPRAC: 0x%x\n",
 301                         gmu_read(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS));
 302         }
 303
 304         return 0;
 305 }
 306
 307 /* Disable CPU control of SPTP power power collapse */
 308 static void a6xx_sptprac_disable(struct a6xx_gmu *gmu)
 309 {
 310         u32 val;
 311         int ret;
 312
 313         /* Make sure retention is on */
 314         gmu_rmw(gmu, REG_A6XX_GPU_CC_GX_GDSCR, 0, (1 << 11));
 315
 316         gmu_write(gmu, REG_A6XX_GMU_GX_SPTPRAC_POWER_CONTROL, 0x778001);
 317
 318         ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS, val,
 319                 (val & 0x04), 100, 10000);
 320
 321         if (ret)
 322                 DRM_DEV_ERROR(gmu->dev, "failed to power off SPTPRAC: 0x%x\n",
 323                         gmu_read(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS));
 324 }
 325
 326 /* Let the GMU know we are starting a boot sequence */
 327 static int a6xx_gmu_gfx_rail_on(struct a6xx_gmu *gmu)
 328 {
 329         u32 vote;
 330
 331         /* Let the GMU know we are getting ready for boot */
 332         gmu_write(gmu, REG_A6XX_GMU_BOOT_SLUMBER_OPTION, 0);
 333
 334         /* Choose the "default" power level as the highest available */
 335         vote = gmu->gx_arc_votes[gmu->nr_gpu_freqs - 1];
 336
 337         gmu_write(gmu, REG_A6XX_GMU_GX_VOTE_IDX, vote & 0xff);
 338         gmu_write(gmu, REG_A6XX_GMU_MX_VOTE_IDX, (vote >> 8) & 0xff);
 339
 340         /* Let the GMU know the boot sequence has started */
 341         return a6xx_gmu_set_oob(gmu, GMU_OOB_BOOT_SLUMBER);
 342 }
 343
 344 /* Let the GMU know that we are about to go into slumber */
 345 static int a6xx_gmu_notify_slumber(struct a6xx_gmu *gmu)
 346 {
 347         int ret;
 348
 349         /* Disable the power counter so the GMU isn't busy */
 350         gmu_write(gmu, REG_A6XX_GMU_CX_GMU_POWER_COUNTER_ENABLE, 0);
 351
 352         /* Disable SPTP_PC if the CPU is responsible for it */
 353         if (gmu->idle_level < GMU_IDLE_STATE_SPTP)
 354                 a6xx_sptprac_disable(gmu);
 355
 356         /* Tell the GMU to get ready to slumber */
 357         gmu_write(gmu, REG_A6XX_GMU_BOOT_SLUMBER_OPTION, 1);
 358
 359         ret = a6xx_gmu_set_oob(gmu, GMU_OOB_BOOT_SLUMBER);
 360         a6xx_gmu_clear_oob(gmu, GMU_OOB_BOOT_SLUMBER);
 361
 362         if (!ret) {
 363                 /* Check to see if the GMU really did slumber */
 364                 if (gmu_read(gmu, REG_A6XX_GPU_GMU_CX_GMU_RPMH_POWER_STATE)
 365                         != 0x0f) {
 366                         DRM_DEV_ERROR(gmu->dev, "The GMU did not go into slumber\n");
 367                         ret = -ETIMEDOUT;
 368                 }
 369         }
 370
 371         /* Put fence into allow mode */
 372         gmu_write(gmu, REG_A6XX_GMU_AO_AHB_FENCE_CTRL, 0);
 373         return ret;
 374 }
 375
 376 static int a6xx_rpmh_start(struct a6xx_gmu *gmu)
 377 {
 378         int ret;
 379         u32 val;
 380
 381         gmu_write(gmu, REG_A6XX_GMU_RSCC_CONTROL_REQ, 1 << 1);
 382         /* Wait for the register to finish posting */
 383         wmb();
 384
 385         ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_RSCC_CONTROL_ACK, val,
 386                 val & (1 << 1), 100, 10000);
 387         if (ret) {
 388                 DRM_DEV_ERROR(gmu->dev, "Unable to power on the GPU RSC\n");
 389                 return ret;
 390         }
 391
 392         ret = gmu_poll_timeout(gmu, REG_A6XX_RSCC_SEQ_BUSY_DRV0, val,
 393                 !val, 100, 10000);
 394
 395         if (ret) {
 396                 DRM_DEV_ERROR(gmu->dev, "GPU RSC sequence stuck while waking up the GPU\n");
 397                 return ret;
 398         }
 399
 400         gmu_write(gmu, REG_A6XX_GMU_RSCC_CONTROL_REQ, 0);
 401
 402         /* Set up CX GMU counter 0 to count busy ticks */
 403         gmu_write(gmu, REG_A6XX_GPU_GMU_AO_GPU_CX_BUSY_MASK, 0xff000000);
 404         gmu_rmw(gmu, REG_A6XX_GMU_CX_GMU_POWER_COUNTER_SELECT_0, 0xff, 0x20);
 405
 406         /* Enable the power counter */
 407         gmu_write(gmu, REG_A6XX_GMU_CX_GMU_POWER_COUNTER_ENABLE, 1);
 408         return 0;
 409 }
 410
 411 static void a6xx_rpmh_stop(struct a6xx_gmu *gmu)
 412 {
 413         int ret;
 414         u32 val;
 415
 416         gmu_write(gmu, REG_A6XX_GMU_RSCC_CONTROL_REQ, 1);
 417
 418         ret = gmu_poll_timeout(gmu, REG_A6XX_GPU_RSCC_RSC_STATUS0_DRV0,
 419                 val, val & (1 << 16), 100, 10000);
 420         if (ret)
 421                 DRM_DEV_ERROR(gmu->dev, "Unable to power off the GPU RSC\n");
 422
 423         gmu_write(gmu, REG_A6XX_GMU_RSCC_CONTROL_REQ, 0);
 424 }
 425
 426 static inline void pdc_write(void __iomem *ptr, u32 offset, u32 value)
 427 {
 428         return msm_writel(value, ptr + (offset << 2));
 429 }
 430
 431 static void __iomem *a6xx_gmu_get_mmio(struct platform_device *pdev,
 432                 const char *name);
 433
 434 static void a6xx_gmu_rpmh_init(struct a6xx_gmu *gmu)
 435 {
 436         struct platform_device *pdev = to_platform_device(gmu->dev);
 437         void __iomem *pdcptr = a6xx_gmu_get_mmio(pdev, "gmu_pdc");
 438         void __iomem *seqptr = a6xx_gmu_get_mmio(pdev, "gmu_pdc_seq");
 439
 440         if (!pdcptr || !seqptr)
 441                 goto err;
 442
 443         /* Disable SDE clock gating */
 444         gmu_write(gmu, REG_A6XX_GPU_RSCC_RSC_STATUS0_DRV0, BIT(24));
 445
 446         /* Setup RSC PDC handshake for sleep and wakeup */
 447         gmu_write(gmu, REG_A6XX_RSCC_PDC_SLAVE_ID_DRV0, 1);
 448         gmu_write(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_DATA, 0);
 449         gmu_write(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_ADDR, 0);
 450         gmu_write(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_DATA + 2, 0);
 451         gmu_write(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_ADDR + 2, 0);
 452         gmu_write(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_DATA + 4, 0x80000000);
 453         gmu_write(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_ADDR + 4, 0);
 454         gmu_write(gmu, REG_A6XX_RSCC_OVERRIDE_START_ADDR, 0);
 455         gmu_write(gmu, REG_A6XX_RSCC_PDC_SEQ_START_ADDR, 0x4520);
 456         gmu_write(gmu, REG_A6XX_RSCC_PDC_MATCH_VALUE_LO, 0x4510);
 457         gmu_write(gmu, REG_A6XX_RSCC_PDC_MATCH_VALUE_HI, 0x4514);
 458
 459         /* Load RSC sequencer uCode for sleep and wakeup */
 460         gmu_write(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0, 0xa7a506a0);
 461         gmu_write(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 1, 0xa1e6a6e7);
 462         gmu_write(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 2, 0xa2e081e1);
 463         gmu_write(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 3, 0xe9a982e2);
 464         gmu_write(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 4, 0x0020e8a8);
 465
 466         /* Load PDC sequencer uCode for power up and power down sequence */
 467         pdc_write(seqptr, REG_A6XX_PDC_GPU_SEQ_MEM_0, 0xfebea1e1);
 468         pdc_write(seqptr, REG_A6XX_PDC_GPU_SEQ_MEM_0 + 1, 0xa5a4a3a2);
 469         pdc_write(seqptr, REG_A6XX_PDC_GPU_SEQ_MEM_0 + 2, 0x8382a6e0);
 470         pdc_write(seqptr, REG_A6XX_PDC_GPU_SEQ_MEM_0 + 3, 0xbce3e284);
 471         pdc_write(seqptr, REG_A6XX_PDC_GPU_SEQ_MEM_0 + 4, 0x002081fc);
 472
 473         /* Set TCS commands used by PDC sequence for low power modes */
 474         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD_ENABLE_BANK, 7);
 475         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD_WAIT_FOR_CMPL_BANK, 0);
 476         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CONTROL, 0);
 477         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD0_MSGID, 0x10108);
 478         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD0_ADDR, 0x30010);
 479         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD0_DATA, 1);
 480         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD0_MSGID + 4, 0x10108);
 481         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD0_ADDR + 4, 0x30000);
 482         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD0_DATA + 4, 0x0);
 483         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD0_MSGID + 8, 0x10108);
 484         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD0_ADDR + 8, 0x30080);
 485         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD0_DATA + 8, 0x0);
 486         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD_ENABLE_BANK, 7);
 487         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD_WAIT_FOR_CMPL_BANK, 0);
 488         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CONTROL, 0);
 489         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD0_MSGID, 0x10108);
 490         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD0_ADDR, 0x30010);
 491         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD0_DATA, 2);
 492         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD0_MSGID + 4, 0x10108);
 493         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD0_ADDR + 4, 0x30000);
 494         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD0_DATA + 4, 0x3);
 495         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD0_MSGID + 8, 0x10108);
 496         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD0_ADDR + 8, 0x30080);
 497         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD0_DATA + 8, 0x3);
 498
 499         /* Setup GPU PDC */
 500         pdc_write(pdcptr, REG_A6XX_PDC_GPU_SEQ_START_ADDR, 0);
 501         pdc_write(pdcptr, REG_A6XX_PDC_GPU_ENABLE_PDC, 0x80000001);
 502
 503         /* ensure no writes happen before the uCode is fully written */
 504         wmb();
 505
 506 err:
 507         devm_iounmap(gmu->dev, pdcptr);
 508         devm_iounmap(gmu->dev, seqptr);
 509 }
 510
 511 /*
 512  * The lowest 16 bits of this value are the number of XO clock cycles for main
 513  * hysteresis which is set at 0x1680 cycles (300 us).  The higher 16 bits are
 514  * for the shorter hysteresis that happens after main - this is 0xa (.5 us)
 515  */
 516
 517 #define GMU_PWR_COL_HYST 0x000a1680
 518
 519 /* Set up the idle state for the GMU */
 520 static void a6xx_gmu_power_config(struct a6xx_gmu *gmu)
 521 {
 522         /* Disable GMU WB/RB buffer */
 523         gmu_write(gmu, REG_A6XX_GMU_SYS_BUS_CONFIG, 0x1);
 524
 525         gmu_write(gmu, REG_A6XX_GMU_PWR_COL_INTER_FRAME_CTRL, 0x9c40400);
 526
 527         switch (gmu->idle_level) {
 528         case GMU_IDLE_STATE_IFPC:
 529                 gmu_write(gmu, REG_A6XX_GMU_PWR_COL_INTER_FRAME_HYST,
 530                         GMU_PWR_COL_HYST);
 531                 gmu_rmw(gmu, REG_A6XX_GMU_PWR_COL_INTER_FRAME_CTRL, 0,
 532                         A6XX_GMU_PWR_COL_INTER_FRAME_CTRL_IFPC_ENABLE |
 533                         A6XX_GMU_PWR_COL_INTER_FRAME_CTRL_HM_POWER_COLLAPSE_ENABLE);
 534                 /* Fall through */
 535         case GMU_IDLE_STATE_SPTP:
 536                 gmu_write(gmu, REG_A6XX_GMU_PWR_COL_SPTPRAC_HYST,
 537                         GMU_PWR_COL_HYST);
 538                 gmu_rmw(gmu, REG_A6XX_GMU_PWR_COL_INTER_FRAME_CTRL, 0,
 539                         A6XX_GMU_PWR_COL_INTER_FRAME_CTRL_IFPC_ENABLE |
 540                         A6XX_GMU_PWR_COL_INTER_FRAME_CTRL_SPTPRAC_POWER_CONTROL_ENABLE);
 541         }
 542
 543         /* Enable RPMh GPU client */
 544         gmu_rmw(gmu, REG_A6XX_GMU_RPMH_CTRL, 0,
 545                 A6XX_GMU_RPMH_CTRL_RPMH_INTERFACE_ENABLE |
 546                 A6XX_GMU_RPMH_CTRL_LLC_VOTE_ENABLE |
 547                 A6XX_GMU_RPMH_CTRL_DDR_VOTE_ENABLE |
 548                 A6XX_GMU_RPMH_CTRL_MX_VOTE_ENABLE |
 549                 A6XX_GMU_RPMH_CTRL_CX_VOTE_ENABLE |
 550                 A6XX_GMU_RPMH_CTRL_GFX_VOTE_ENABLE);
 551 }
 552
 553 static int a6xx_gmu_fw_start(struct a6xx_gmu *gmu, unsigned int state)
 554 {
 555         static bool rpmh_init;
 556         struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
 557         struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
 558         int i, ret;
 559         u32 chipid;
 560         u32 *image;
 561
 562         if (state == GMU_WARM_BOOT) {
 563                 ret = a6xx_rpmh_start(gmu);
 564                 if (ret)
 565                         return ret;
 566         } else {
 567                 if (WARN(!adreno_gpu->fw[ADRENO_FW_GMU],
 568                         "GMU firmware is not loaded\n"))
 569                         return -ENOENT;
 570
 571                 /* Sanity check the size of the firmware that was loaded */
 572                 if (adreno_gpu->fw[ADRENO_FW_GMU]->size > 0x8000) {
 573                         DRM_DEV_ERROR(gmu->dev,
 574                                 "GMU firmware is bigger than the available region\n");
 575                         return -EINVAL;
 576                 }
 577
 578                 /* Turn on register retention */
 579                 gmu_write(gmu, REG_A6XX_GMU_GENERAL_7, 1);
 580
 581                 /* We only need to load the RPMh microcode once */
 582                 if (!rpmh_init) {
 583                         a6xx_gmu_rpmh_init(gmu);
 584                         rpmh_init = true;
 585                 } else {
 586                         ret = a6xx_rpmh_start(gmu);
 587                         if (ret)
 588                                 return ret;
 589                 }
 590
 591                 image = (u32 *) adreno_gpu->fw[ADRENO_FW_GMU]->data;
 592
 593                 for (i = 0; i < adreno_gpu->fw[ADRENO_FW_GMU]->size >> 2; i++)
 594                         gmu_write(gmu, REG_A6XX_GMU_CM3_ITCM_START + i,
 595                                 image[i]);
 596         }
 597
 598         gmu_write(gmu, REG_A6XX_GMU_CM3_FW_INIT_RESULT, 0);
 599         gmu_write(gmu, REG_A6XX_GMU_CM3_BOOT_CONFIG, 0x02);
 600
 601         /* Write the iova of the HFI table */
 602         gmu_write(gmu, REG_A6XX_GMU_HFI_QTBL_ADDR, gmu->hfi->iova);
 603         gmu_write(gmu, REG_A6XX_GMU_HFI_QTBL_INFO, 1);
 604
 605         gmu_write(gmu, REG_A6XX_GMU_AHB_FENCE_RANGE_0,
 606                 (1 << 31) | (0xa << 18) | (0xa0));
 607
 608         chipid = adreno_gpu->rev.core << 24;
 609         chipid |= adreno_gpu->rev.major << 16;
 610         chipid |= adreno_gpu->rev.minor << 12;
 611         chipid |= adreno_gpu->rev.patchid << 8;
 612
 613         gmu_write(gmu, REG_A6XX_GMU_HFI_SFR_ADDR, chipid);
 614
 615         /* Set up the lowest idle level on the GMU */
 616         a6xx_gmu_power_config(gmu);
 617
 618         ret = a6xx_gmu_start(gmu);
 619         if (ret)
 620                 return ret;
 621
 622         ret = a6xx_gmu_gfx_rail_on(gmu);
 623         if (ret)
 624                 return ret;
 625
 626         /* Enable SPTP_PC if the CPU is responsible for it */
 627         if (gmu->idle_level < GMU_IDLE_STATE_SPTP) {
 628                 ret = a6xx_sptprac_enable(gmu);
 629                 if (ret)
 630                         return ret;
 631         }
 632
 633         ret = a6xx_gmu_hfi_start(gmu);
 634         if (ret)
 635                 return ret;
 636
 637         /* FIXME: Do we need this wmb() here? */
 638         wmb();
 639
 640         return 0;
 641 }
 642
 643 #define A6XX_HFI_IRQ_MASK \
 644         (A6XX_GMU_GMU2HOST_INTR_INFO_CM3_FAULT)
 645
 646 #define A6XX_GMU_IRQ_MASK \
 647         (A6XX_GMU_AO_HOST_INTERRUPT_STATUS_WDOG_BITE | \
 648          A6XX_GMU_AO_HOST_INTERRUPT_STATUS_HOST_AHB_BUS_ERROR | \
 649          A6XX_GMU_AO_HOST_INTERRUPT_STATUS_FENCE_ERR)
 650
 651 static void a6xx_gmu_irq_disable(struct a6xx_gmu *gmu)
 652 {
 653         disable_irq(gmu->gmu_irq);
 654         disable_irq(gmu->hfi_irq);
 655
 656         gmu_write(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_MASK, ~0);
 657         gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_MASK, ~0);
 658 }
 659
 660 static void a6xx_gmu_rpmh_off(struct a6xx_gmu *gmu)
 661 {
 662         u32 val;
 663
 664         /* Make sure there are no outstanding RPMh votes */
 665         gmu_poll_timeout(gmu, REG_A6XX_RSCC_TCS0_DRV0_STATUS, val,
 666                 (val & 1), 100, 10000);
 667         gmu_poll_timeout(gmu, REG_A6XX_RSCC_TCS1_DRV0_STATUS, val,
 668                 (val & 1), 100, 10000);
 669         gmu_poll_timeout(gmu, REG_A6XX_RSCC_TCS2_DRV0_STATUS, val,
 670                 (val & 1), 100, 10000);
 671         gmu_poll_timeout(gmu, REG_A6XX_RSCC_TCS3_DRV0_STATUS, val,
 672                 (val & 1), 100, 1000);
 673 }
 674
 675 /* Force the GMU off in case it isn't responsive */
 676 static void a6xx_gmu_force_off(struct a6xx_gmu *gmu)
 677 {
 678         /* Flush all the queues */
 679         a6xx_hfi_stop(gmu);
 680
 681         /* Stop the interrupts */
 682         a6xx_gmu_irq_disable(gmu);
 683
 684         /* Force off SPTP in case the GMU is managing it */
 685         a6xx_sptprac_disable(gmu);
 686
 687         /* Make sure there are no outstanding RPMh votes */
 688         a6xx_gmu_rpmh_off(gmu);
 689 }
 690
 691 int a6xx_gmu_resume(struct a6xx_gpu *a6xx_gpu)
 692 {
 693         struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
 694         struct msm_gpu *gpu = &adreno_gpu->base;
 695         struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
 696         int status, ret;
 697
 698         if (WARN(!gmu->mmio, "The GMU is not set up yet\n"))
 699                 return 0;
 700
 701         gmu->hung = false;
 702
 703         /* Turn on the resources */
 704         pm_runtime_get_sync(gmu->dev);
 705
 706         /* Use a known rate to bring up the GMU */
 707         clk_set_rate(gmu->core_clk, 200000000);
 708         ret = clk_bulk_prepare_enable(gmu->nr_clocks, gmu->clocks);
 709         if (ret) {
 710                 pm_runtime_put(gmu->dev);
 711                 return ret;
 712         }
 713
 714         /* Set the bus quota to a reasonable value for boot */
 715         icc_set_bw(gpu->icc_path, 0, MBps_to_icc(3072));
 716
 717         /* Enable the GMU interrupt */
 718         gmu_write(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_CLR, ~0);
 719         gmu_write(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_MASK, ~A6XX_GMU_IRQ_MASK);
 720         enable_irq(gmu->gmu_irq);
 721
 722         /* Check to see if we are doing a cold or warm boot */
 723         status = gmu_read(gmu, REG_A6XX_GMU_GENERAL_7) == 1 ?
 724                 GMU_WARM_BOOT : GMU_COLD_BOOT;
 725
 726         ret = a6xx_gmu_fw_start(gmu, status);
 727         if (ret)
 728                 goto out;
 729
 730         ret = a6xx_hfi_start(gmu, status);
 731         if (ret)
 732                 goto out;
 733
 734         /*
 735          * Turn on the GMU firmware fault interrupt after we know the boot
 736          * sequence is successful
 737          */
 738         gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_CLR, ~0);
 739         gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_MASK, ~A6XX_HFI_IRQ_MASK);
 740         enable_irq(gmu->hfi_irq);
 741
 742         /* Set the GPU to the highest power frequency */
 743         __a6xx_gmu_set_freq(gmu, gmu->nr_gpu_freqs - 1);
 744
 745         /*
 746          * "enable" the GX power domain which won't actually do anything but it
 747          * will make sure that the refcounting is correct in case we need to
 748          * bring down the GX after a GMU failure
 749          */
 750         if (!IS_ERR_OR_NULL(gmu->gxpd))
 751                 pm_runtime_get(gmu->gxpd);
 752
 753 out:
 754         /* On failure, shut down the GMU to leave it in a good state */
 755         if (ret) {
 756                 disable_irq(gmu->gmu_irq);
 757                 a6xx_rpmh_stop(gmu);
 758                 pm_runtime_put(gmu->dev);
 759         }
 760
 761         return ret;
 762 }
 763
 764 bool a6xx_gmu_isidle(struct a6xx_gmu *gmu)
 765 {
 766         u32 reg;
 767
 768         if (!gmu->mmio)
 769                 return true;
 770
 771         reg = gmu_read(gmu, REG_A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS);
 772
 773         if (reg &  A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS_GPUBUSYIGNAHB)
 774                 return false;
 775
 776         return true;
 777 }
 778
 779 /* Gracefully try to shut down the GMU and by extension the GPU */
 780 static void a6xx_gmu_shutdown(struct a6xx_gmu *gmu)
 781 {
 782         struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
 783         struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
 784         struct msm_gpu *gpu = &adreno_gpu->base;
 785         u32 val;
 786
 787         /*
 788          * The GMU may still be in slumber unless the GPU started so check and
 789          * skip putting it back into slumber if so
 790          */
 791         val = gmu_read(gmu, REG_A6XX_GPU_GMU_CX_GMU_RPMH_POWER_STATE);
 792
 793         if (val != 0xf) {
 794                 int ret = a6xx_gmu_wait_for_idle(gmu);
 795
 796                 /* If the GMU isn't responding assume it is hung */
 797                 if (ret) {
 798                         a6xx_gmu_force_off(gmu);
 799                         return;
 800                 }
 801
 802                 /* Clear the VBIF pipe before shutting down */
 803                 gpu_write(gpu, REG_A6XX_VBIF_XIN_HALT_CTRL0, 0xf);
 804                 spin_until((gpu_read(gpu, REG_A6XX_VBIF_XIN_HALT_CTRL1) & 0xf)
 805                         == 0xf);
 806                 gpu_write(gpu, REG_A6XX_VBIF_XIN_HALT_CTRL0, 0);
 807
 808                 /* tell the GMU we want to slumber */
 809                 a6xx_gmu_notify_slumber(gmu);
 810
 811                 ret = gmu_poll_timeout(gmu,
 812                         REG_A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS, val,
 813                         !(val & A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS_GPUBUSYIGNAHB),
 814                         100, 10000);
 815
 816                 /*
 817                  * Let the user know we failed to slumber but don't worry too
 818                  * much because we are powering down anyway
 819                  */
 820
 821                 if (ret)
 822                         DRM_DEV_ERROR(gmu->dev,
 823                                 "Unable to slumber GMU: status = 0%x/0%x\n",
 824                                 gmu_read(gmu,
 825                                         REG_A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS),
 826                                 gmu_read(gmu,
 827                                         REG_A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS2));
 828         }
 829
 830         /* Turn off HFI */
 831         a6xx_hfi_stop(gmu);
 832
 833         /* Stop the interrupts and mask the hardware */
 834         a6xx_gmu_irq_disable(gmu);
 835
 836         /* Tell RPMh to power off the GPU */
 837         a6xx_rpmh_stop(gmu);
 838 }
 839
 840
 841 int a6xx_gmu_stop(struct a6xx_gpu *a6xx_gpu)
 842 {
 843         struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
 844         struct msm_gpu *gpu = &a6xx_gpu->base.base;
 845
 846         if (!pm_runtime_active(gmu->dev))
 847                 return 0;
 848
 849         /*
 850          * Force the GMU off if we detected a hang, otherwise try to shut it
 851          * down gracefully
 852          */
 853         if (gmu->hung)
 854                 a6xx_gmu_force_off(gmu);
 855         else
 856                 a6xx_gmu_shutdown(gmu);
 857
 858         /* Remove the bus vote */
 859         icc_set_bw(gpu->icc_path, 0, 0);
 860
 861         /*
 862          * Make sure the GX domain is off before turning off the GMU (CX)
 863          * domain. Usually the GMU does this but only if the shutdown sequence
 864          * was successful
 865          */
 866         if (!IS_ERR_OR_NULL(gmu->gxpd))
 867                 pm_runtime_put_sync(gmu->gxpd);
 868
 869         clk_bulk_disable_unprepare(gmu->nr_clocks, gmu->clocks);
 870
 871         pm_runtime_put_sync(gmu->dev);
 872
 873         return 0;
 874 }
 875
 876 static void a6xx_gmu_memory_free(struct a6xx_gmu *gmu, struct a6xx_gmu_bo *bo)
 877 {
 878         int count, i;
 879         u64 iova;
 880
 881         if (IS_ERR_OR_NULL(bo))
 882                 return;
 883
 884         count = bo->size >> PAGE_SHIFT;
 885         iova = bo->iova;
 886
 887         for (i = 0; i < count; i++, iova += PAGE_SIZE) {
 888                 iommu_unmap(gmu->domain, iova, PAGE_SIZE);
 889                 __free_pages(bo->pages[i], 0);
 890         }
 891
 892         kfree(bo->pages);
 893         kfree(bo);
 894 }
 895
 896 static struct a6xx_gmu_bo *a6xx_gmu_memory_alloc(struct a6xx_gmu *gmu,
 897                 size_t size)
 898 {
 899         struct a6xx_gmu_bo *bo;
 900         int ret, count, i;
 901
 902         bo = kzalloc(sizeof(*bo), GFP_KERNEL);
 903         if (!bo)
 904                 return ERR_PTR(-ENOMEM);
 905
 906         bo->size = PAGE_ALIGN(size);
 907
 908         count = bo->size >> PAGE_SHIFT;
 909
 910         bo->pages = kcalloc(count, sizeof(struct page *), GFP_KERNEL);
 911         if (!bo->pages) {
 912                 kfree(bo);
 913                 return ERR_PTR(-ENOMEM);
 914         }
 915
 916         for (i = 0; i < count; i++) {
 917                 bo->pages[i] = alloc_page(GFP_KERNEL);
 918                 if (!bo->pages[i])
 919                         goto err;
 920         }
 921
 922         bo->iova = gmu->uncached_iova_base;
 923
 924         for (i = 0; i < count; i++) {
 925                 ret = iommu_map(gmu->domain,
 926                         bo->iova + (PAGE_SIZE * i),
 927                         page_to_phys(bo->pages[i]), PAGE_SIZE,
 928                         IOMMU_READ | IOMMU_WRITE);
 929
 930                 if (ret) {
 931                         DRM_DEV_ERROR(gmu->dev, "Unable to map GMU buffer object\n");
 932
 933                         for (i = i - 1 ; i >= 0; i--)
 934                                 iommu_unmap(gmu->domain,
 935                                         bo->iova + (PAGE_SIZE * i),
 936                                         PAGE_SIZE);
 937
 938                         goto err;
 939                 }
 940         }
 941
 942         bo->virt = vmap(bo->pages, count, VM_IOREMAP,
 943                 pgprot_writecombine(PAGE_KERNEL));
 944         if (!bo->virt)
 945                 goto err;
 946
 947         /* Align future IOVA addresses on 1MB boundaries */
 948         gmu->uncached_iova_base += ALIGN(size, SZ_1M);
 949
 950         return bo;
 951
 952 err:
 953         for (i = 0; i < count; i++) {
 954                 if (bo->pages[i])
 955                         __free_pages(bo->pages[i], 0);
 956         }
 957
 958         kfree(bo->pages);
 959         kfree(bo);
 960
 961         return ERR_PTR(-ENOMEM);
 962 }
 963
 964 static int a6xx_gmu_memory_probe(struct a6xx_gmu *gmu)
 965 {
 966         int ret;
 967
 968         /*
 969          * The GMU address space is hardcoded to treat the range
 970          * 0x60000000 - 0x80000000 as un-cached memory. All buffers shared
 971          * between the GMU and the CPU will live in this space
 972          */
 973         gmu->uncached_iova_base = 0x60000000;
 974
 975
 976         gmu->domain = iommu_domain_alloc(&platform_bus_type);
 977         if (!gmu->domain)
 978                 return -ENODEV;
 979
 980         ret = iommu_attach_device(gmu->domain, gmu->dev);
 981
 982         if (ret) {
 983                 iommu_domain_free(gmu->domain);
 984                 gmu->domain = NULL;
 985         }
 986
 987         return ret;
 988 }
 989
 990 /* Return the 'arc-level' for the given frequency */
 991 static unsigned int a6xx_gmu_get_arc_level(struct device *dev,
 992                                            unsigned long freq)
 993 {
 994         struct dev_pm_opp *opp;
 995         unsigned int val;
 996
 997         if (!freq)
 998                 return 0;
 999
1000         opp = dev_pm_opp_find_freq_exact(dev, freq, true);
1001         if (IS_ERR(opp))
1002                 return 0;
1003
1004         val = dev_pm_opp_get_level(opp);
1005
1006         dev_pm_opp_put(opp);
1007
1008         return val;
1009 }
1010
1011 static int a6xx_gmu_rpmh_arc_votes_init(struct device *dev, u32 *votes,
1012                 unsigned long *freqs, int freqs_count, const char *id)
1013 {
1014         int i, j;
1015         const u16 *pri, *sec;
1016         size_t pri_count, sec_count;
1017
1018         pri = cmd_db_read_aux_data(id, &pri_count);
1019         if (IS_ERR(pri))
1020                 return PTR_ERR(pri);
1021         /*
1022          * The data comes back as an array of unsigned shorts so adjust the
1023          * count accordingly
1024          */
1025         pri_count >>= 1;
1026         if (!pri_count)
1027                 return -EINVAL;
1028
1029         sec = cmd_db_read_aux_data("mx.lvl", &sec_count);
1030         if (IS_ERR(sec))
1031                 return PTR_ERR(sec);
1032
1033         sec_count >>= 1;
1034         if (!sec_count)
1035                 return -EINVAL;
1036
1037         /* Construct a vote for each frequency */
1038         for (i = 0; i < freqs_count; i++) {
1039                 u8 pindex = 0, sindex = 0;
1040                 unsigned int level = a6xx_gmu_get_arc_level(dev, freqs[i]);
1041
1042                 /* Get the primary index that matches the arc level */
1043                 for (j = 0; j < pri_count; j++) {
1044                         if (pri[j] >= level) {
1045                                 pindex = j;
1046                                 break;
1047                         }
1048                 }
1049
1050                 if (j == pri_count) {
1051                         DRM_DEV_ERROR(dev,
1052                                 "Level %u not found in in the RPMh list\n",
1053                                         level);
1054                         DRM_DEV_ERROR(dev, "Available levels:\n");
1055                         for (j = 0; j < pri_count; j++)
1056                                 DRM_DEV_ERROR(dev, "  %u\n", pri[j]);
1057
1058                         return -EINVAL;
1059                 }
1060
1061                 /*
1062                  * Look for a level in in the secondary list that matches. If
1063                  * nothing fits, use the maximum non zero vote
1064                  */
1065
1066                 for (j = 0; j < sec_count; j++) {
1067                         if (sec[j] >= level) {
1068                                 sindex = j;
1069                                 break;
1070                         } else if (sec[j]) {
1071                                 sindex = j;
1072                         }
1073                 }
1074
1075                 /* Construct the vote */
1076                 votes[i] = ((pri[pindex] & 0xffff) << 16) |
1077                         (sindex << 8) | pindex;
1078         }
1079
1080         return 0;
1081 }
1082
1083 /*
1084  * The GMU votes with the RPMh for itself and on behalf of the GPU but we need
1085  * to construct the list of votes on the CPU and send it over. Query the RPMh
1086  * voltage levels and build the votes
1087  */
1088
1089 static int a6xx_gmu_rpmh_votes_init(struct a6xx_gmu *gmu)
1090 {
1091         struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
1092         struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
1093         struct msm_gpu *gpu = &adreno_gpu->base;
1094         int ret;
1095
1096         /* Build the GX votes */
1097         ret = a6xx_gmu_rpmh_arc_votes_init(&gpu->pdev->dev, gmu->gx_arc_votes,
1098                 gmu->gpu_freqs, gmu->nr_gpu_freqs, "gfx.lvl");
1099
1100         /* Build the CX votes */
1101         ret |= a6xx_gmu_rpmh_arc_votes_init(gmu->dev, gmu->cx_arc_votes,
1102                 gmu->gmu_freqs, gmu->nr_gmu_freqs, "cx.lvl");
1103
1104         return ret;
1105 }
1106
1107 static int a6xx_gmu_build_freq_table(struct device *dev, unsigned long *freqs,
1108                 u32 size)
1109 {
1110         int count = dev_pm_opp_get_opp_count(dev);
1111         struct dev_pm_opp *opp;
1112         int i, index = 0;
1113         unsigned long freq = 1;
1114
1115         /*
1116          * The OPP table doesn't contain the "off" frequency level so we need to
1117          * add 1 to the table size to account for it
1118          */
1119
1120         if (WARN(count + 1 > size,
1121                 "The GMU frequency table is being truncated\n"))
1122                 count = size - 1;
1123
1124         /* Set the "off" frequency */
1125         freqs[index++] = 0;
1126
1127         for (i = 0; i < count; i++) {
1128                 opp = dev_pm_opp_find_freq_ceil(dev, &freq);
1129                 if (IS_ERR(opp))
1130                         break;
1131
1132                 dev_pm_opp_put(opp);
1133                 freqs[index++] = freq++;
1134         }
1135
1136         return index;
1137 }
1138
1139 static int a6xx_gmu_pwrlevels_probe(struct a6xx_gmu *gmu)
1140 {
1141         struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
1142         struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
1143         struct msm_gpu *gpu = &adreno_gpu->base;
1144
1145         int ret = 0;
1146
1147         /*
1148          * The GMU handles its own frequency switching so build a list of
1149          * available frequencies to send during initialization
1150          */
1151         ret = dev_pm_opp_of_add_table(gmu->dev);
1152         if (ret) {
1153                 DRM_DEV_ERROR(gmu->dev, "Unable to set the OPP table for the GMU\n");
1154                 return ret;
1155         }
1156
1157         gmu->nr_gmu_freqs = a6xx_gmu_build_freq_table(gmu->dev,
1158                 gmu->gmu_freqs, ARRAY_SIZE(gmu->gmu_freqs));
1159
1160         /*
1161          * The GMU also handles GPU frequency switching so build a list
1162          * from the GPU OPP table
1163          */
1164         gmu->nr_gpu_freqs = a6xx_gmu_build_freq_table(&gpu->pdev->dev,
1165                 gmu->gpu_freqs, ARRAY_SIZE(gmu->gpu_freqs));
1166
1167         /* Build the list of RPMh votes that we'll send to the GMU */
1168         return a6xx_gmu_rpmh_votes_init(gmu);
1169 }
1170
1171 static int a6xx_gmu_clocks_probe(struct a6xx_gmu *gmu)
1172 {
1173         int ret = msm_clk_bulk_get(gmu->dev, &gmu->clocks);
1174
1175         if (ret < 1)
1176                 return ret;
1177
1178         gmu->nr_clocks = ret;
1179
1180         gmu->core_clk = msm_clk_bulk_get_clock(gmu->clocks,
1181                 gmu->nr_clocks, "gmu");
1182
1183         return 0;
1184 }
1185
1186 static void __iomem *a6xx_gmu_get_mmio(struct platform_device *pdev,
1187                 const char *name)
1188 {
1189         void __iomem *ret;
1190         struct resource *res = platform_get_resource_byname(pdev,
1191                         IORESOURCE_MEM, name);
1192
1193         if (!res) {
1194                 DRM_DEV_ERROR(&pdev->dev, "Unable to find the %s registers\n", name);
1195                 return ERR_PTR(-EINVAL);
1196         }
1197
1198         ret = devm_ioremap(&pdev->dev, res->start, resource_size(res));
1199         if (!ret) {
1200                 DRM_DEV_ERROR(&pdev->dev, "Unable to map the %s registers\n", name);
1201                 return ERR_PTR(-EINVAL);
1202         }
1203
1204         return ret;
1205 }
1206
1207 static int a6xx_gmu_get_irq(struct a6xx_gmu *gmu, struct platform_device *pdev,
1208                 const char *name, irq_handler_t handler)
1209 {
1210         int irq, ret;
1211
1212         irq = platform_get_irq_byname(pdev, name);
1213
1214         ret = devm_request_irq(&pdev->dev, irq, handler, IRQF_TRIGGER_HIGH,
1215                 name, gmu);
1216         if (ret) {
1217                 DRM_DEV_ERROR(&pdev->dev, "Unable to get interrupt %s\n", name);
1218                 return ret;
1219         }
1220
1221         disable_irq(irq);
1222
1223         return irq;
1224 }
1225
1226 void a6xx_gmu_remove(struct a6xx_gpu *a6xx_gpu)
1227 {
1228         struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
1229
1230         if (IS_ERR_OR_NULL(gmu->mmio))
1231                 return;
1232
1233         a6xx_gmu_stop(a6xx_gpu);
1234
1235         pm_runtime_disable(gmu->dev);
1236
1237         if (!IS_ERR_OR_NULL(gmu->gxpd)) {
1238                 pm_runtime_disable(gmu->gxpd);
1239                 dev_pm_domain_detach(gmu->gxpd, false);
1240         }
1241
1242         a6xx_gmu_irq_disable(gmu);
1243         a6xx_gmu_memory_free(gmu, gmu->hfi);
1244
1245         iommu_detach_device(gmu->domain, gmu->dev);
1246
1247         iommu_domain_free(gmu->domain);
1248 }
1249
1250 int a6xx_gmu_probe(struct a6xx_gpu *a6xx_gpu, struct device_node *node)
1251 {
1252         struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
1253         struct platform_device *pdev = of_find_device_by_node(node);
1254         int ret;
1255
1256         if (!pdev)
1257                 return -ENODEV;
1258
1259         gmu->dev = &pdev->dev;
1260
1261         of_dma_configure(gmu->dev, node, true);
1262
1263         /* Fow now, don't do anything fancy until we get our feet under us */
1264         gmu->idle_level = GMU_IDLE_STATE_ACTIVE;
1265
1266         pm_runtime_enable(gmu->dev);
1267
1268         /* Get the list of clocks */
1269         ret = a6xx_gmu_clocks_probe(gmu);
1270         if (ret)
1271                 return ret;
1272
1273         /* Set up the IOMMU context bank */
1274         ret = a6xx_gmu_memory_probe(gmu);
1275         if (ret)
1276                 return ret;
1277
1278         /* Allocate memory for for the HFI queues */
1279         gmu->hfi = a6xx_gmu_memory_alloc(gmu, SZ_16K);
1280         if (IS_ERR(gmu->hfi))
1281                 goto err;
1282
1283         /* Allocate memory for the GMU debug region */
1284         gmu->debug = a6xx_gmu_memory_alloc(gmu, SZ_16K);
1285         if (IS_ERR(gmu->debug))
1286                 goto err;
1287
1288         /* Map the GMU registers */
1289         gmu->mmio = a6xx_gmu_get_mmio(pdev, "gmu");
1290         if (IS_ERR(gmu->mmio))
1291                 goto err;
1292
1293         /* Get the HFI and GMU interrupts */
1294         gmu->hfi_irq = a6xx_gmu_get_irq(gmu, pdev, "hfi", a6xx_hfi_irq);
1295         gmu->gmu_irq = a6xx_gmu_get_irq(gmu, pdev, "gmu", a6xx_gmu_irq);
1296
1297         if (gmu->hfi_irq < 0 || gmu->gmu_irq < 0)
1298                 goto err;
1299
1300         /*
1301          * Get a link to the GX power domain to reset the GPU in case of GMU
1302          * crash
1303          */
1304         gmu->gxpd = dev_pm_domain_attach_by_name(gmu->dev, "gx");
1305
1306         /* Get the power levels for the GMU and GPU */
1307         a6xx_gmu_pwrlevels_probe(gmu);
1308
1309         /* Set up the HFI queues */
1310         a6xx_hfi_init(gmu);
1311
1312         return 0;
1313 err:
1314         a6xx_gmu_memory_free(gmu, gmu->hfi);
1315
1316         if (gmu->domain) {
1317                 iommu_detach_device(gmu->domain, gmu->dev);
1318
1319                 iommu_domain_free(gmu->domain);
1320         }
1321
1322         return -ENODEV;
1323 }