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

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (c) 2017-2019 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 #include <drm/drm_gem.h>
  10
  11 #include "a6xx_gpu.h"
  12 #include "a6xx_gmu.xml.h"
  13 #include "msm_gem.h"
  14 #include "msm_gpu_trace.h"
  15 #include "msm_mmu.h"
  16
  17 static void a6xx_gmu_fault(struct a6xx_gmu *gmu)
  18 {
  19         struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
  20         struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
  21         struct msm_gpu *gpu = &adreno_gpu->base;
  22
  23         /* FIXME: add a banner here */
  24         gmu->hung = true;
  25
  26         /* Turn off the hangcheck timer while we are resetting */
  27         del_timer(&gpu->hangcheck_timer);
  28
  29         /* Queue the GPU handler because we need to treat this as a recovery */
  30         kthread_queue_work(gpu->worker, &gpu->recover_work);
  31 }
  32
  33 static irqreturn_t a6xx_gmu_irq(int irq, void *data)
  34 {
  35         struct a6xx_gmu *gmu = data;
  36         u32 status;
  37
  38         status = gmu_read(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_STATUS);
  39         gmu_write(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_CLR, status);
  40
  41         if (status & A6XX_GMU_AO_HOST_INTERRUPT_STATUS_WDOG_BITE) {
  42                 dev_err_ratelimited(gmu->dev, "GMU watchdog expired\n");
  43
  44                 a6xx_gmu_fault(gmu);
  45         }
  46
  47         if (status &  A6XX_GMU_AO_HOST_INTERRUPT_STATUS_HOST_AHB_BUS_ERROR)
  48                 dev_err_ratelimited(gmu->dev, "GMU AHB bus error\n");
  49
  50         if (status & A6XX_GMU_AO_HOST_INTERRUPT_STATUS_FENCE_ERR)
  51                 dev_err_ratelimited(gmu->dev, "GMU fence error: 0x%x\n",
  52                         gmu_read(gmu, REG_A6XX_GMU_AHB_FENCE_STATUS));
  53
  54         return IRQ_HANDLED;
  55 }
  56
  57 static irqreturn_t a6xx_hfi_irq(int irq, void *data)
  58 {
  59         struct a6xx_gmu *gmu = data;
  60         u32 status;
  61
  62         status = gmu_read(gmu, REG_A6XX_GMU_GMU2HOST_INTR_INFO);
  63         gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_CLR, status);
  64
  65         if (status & A6XX_GMU_GMU2HOST_INTR_INFO_CM3_FAULT) {
  66                 dev_err_ratelimited(gmu->dev, "GMU firmware fault\n");
  67
  68                 a6xx_gmu_fault(gmu);
  69         }
  70
  71         return IRQ_HANDLED;
  72 }
  73
  74 bool a6xx_gmu_sptprac_is_on(struct a6xx_gmu *gmu)
  75 {
  76         u32 val;
  77
  78         /* This can be called from gpu state code so make sure GMU is valid */
  79         if (!gmu->initialized)
  80                 return false;
  81
  82         val = gmu_read(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS);
  83
  84         return !(val &
  85                 (A6XX_GMU_SPTPRAC_PWR_CLK_STATUS_SPTPRAC_GDSC_POWER_OFF |
  86                 A6XX_GMU_SPTPRAC_PWR_CLK_STATUS_SP_CLOCK_OFF));
  87 }
  88
  89 /* Check to see if the GX rail is still powered */
  90 bool a6xx_gmu_gx_is_on(struct a6xx_gmu *gmu)
  91 {
  92         u32 val;
  93
  94         /* This can be called from gpu state code so make sure GMU is valid */
  95         if (!gmu->initialized)
  96                 return false;
  97
  98         val = gmu_read(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS);
  99
 100         return !(val &
 101                 (A6XX_GMU_SPTPRAC_PWR_CLK_STATUS_GX_HM_GDSC_POWER_OFF |
 102                 A6XX_GMU_SPTPRAC_PWR_CLK_STATUS_GX_HM_CLK_OFF));
 103 }
 104
 105 void a6xx_gmu_set_freq(struct msm_gpu *gpu, struct dev_pm_opp *opp,
 106                        bool suspended)
 107 {
 108         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 109         struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu);
 110         struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
 111         u32 perf_index;
 112         unsigned long gpu_freq;
 113         int ret = 0;
 114
 115         gpu_freq = dev_pm_opp_get_freq(opp);
 116
 117         if (gpu_freq == gmu->freq)
 118                 return;
 119
 120         for (perf_index = 0; perf_index < gmu->nr_gpu_freqs - 1; perf_index++)
 121                 if (gpu_freq == gmu->gpu_freqs[perf_index])
 122                         break;
 123
 124         gmu->current_perf_index = perf_index;
 125         gmu->freq = gmu->gpu_freqs[perf_index];
 126
 127         trace_msm_gmu_freq_change(gmu->freq, perf_index);
 128
 129         /*
 130          * This can get called from devfreq while the hardware is idle. Don't
 131          * bring up the power if it isn't already active. All we're doing here
 132          * is updating the frequency so that when we come back online we're at
 133          * the right rate.
 134          */
 135         if (suspended)
 136                 return;
 137
 138         if (!gmu->legacy) {
 139                 a6xx_hfi_set_freq(gmu, perf_index);
 140                 dev_pm_opp_set_opp(&gpu->pdev->dev, opp);
 141                 return;
 142         }
 143
 144         gmu_write(gmu, REG_A6XX_GMU_DCVS_ACK_OPTION, 0);
 145
 146         gmu_write(gmu, REG_A6XX_GMU_DCVS_PERF_SETTING,
 147                         ((3 & 0xf) << 28) | perf_index);
 148
 149         /*
 150          * Send an invalid index as a vote for the bus bandwidth and let the
 151          * firmware decide on the right vote
 152          */
 153         gmu_write(gmu, REG_A6XX_GMU_DCVS_BW_SETTING, 0xff);
 154
 155         /* Set and clear the OOB for DCVS to trigger the GMU */
 156         a6xx_gmu_set_oob(gmu, GMU_OOB_DCVS_SET);
 157         a6xx_gmu_clear_oob(gmu, GMU_OOB_DCVS_SET);
 158
 159         ret = gmu_read(gmu, REG_A6XX_GMU_DCVS_RETURN);
 160         if (ret)
 161                 dev_err(gmu->dev, "GMU set GPU frequency error: %d\n", ret);
 162
 163         dev_pm_opp_set_opp(&gpu->pdev->dev, opp);
 164 }
 165
 166 unsigned long a6xx_gmu_get_freq(struct msm_gpu *gpu)
 167 {
 168         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 169         struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu);
 170         struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
 171
 172         return  gmu->freq;
 173 }
 174
 175 static bool a6xx_gmu_check_idle_level(struct a6xx_gmu *gmu)
 176 {
 177         u32 val;
 178         int local = gmu->idle_level;
 179
 180         /* SPTP and IFPC both report as IFPC */
 181         if (gmu->idle_level == GMU_IDLE_STATE_SPTP)
 182                 local = GMU_IDLE_STATE_IFPC;
 183
 184         val = gmu_read(gmu, REG_A6XX_GPU_GMU_CX_GMU_RPMH_POWER_STATE);
 185
 186         if (val == local) {
 187                 if (gmu->idle_level != GMU_IDLE_STATE_IFPC ||
 188                         !a6xx_gmu_gx_is_on(gmu))
 189                         return true;
 190         }
 191
 192         return false;
 193 }
 194
 195 /* Wait for the GMU to get to its most idle state */
 196 int a6xx_gmu_wait_for_idle(struct a6xx_gmu *gmu)
 197 {
 198         return spin_until(a6xx_gmu_check_idle_level(gmu));
 199 }
 200
 201 static int a6xx_gmu_start(struct a6xx_gmu *gmu)
 202 {
 203         int ret;
 204         u32 val;
 205         u32 mask, reset_val;
 206
 207         val = gmu_read(gmu, REG_A6XX_GMU_CM3_DTCM_START + 0xff8);
 208         if (val <= 0x20010004) {
 209                 mask = 0xffffffff;
 210                 reset_val = 0xbabeface;
 211         } else {
 212                 mask = 0x1ff;
 213                 reset_val = 0x100;
 214         }
 215
 216         gmu_write(gmu, REG_A6XX_GMU_CM3_SYSRESET, 1);
 217
 218         /* Set the log wptr index
 219          * note: downstream saves the value in poweroff and restores it here
 220          */
 221         gmu_write(gmu, REG_A6XX_GPU_GMU_CX_GMU_PWR_COL_CP_RESP, 0);
 222
 223         gmu_write(gmu, REG_A6XX_GMU_CM3_SYSRESET, 0);
 224
 225         ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_CM3_FW_INIT_RESULT, val,
 226                 (val & mask) == reset_val, 100, 10000);
 227
 228         if (ret)
 229                 DRM_DEV_ERROR(gmu->dev, "GMU firmware initialization timed out\n");
 230
 231         return ret;
 232 }
 233
 234 static int a6xx_gmu_hfi_start(struct a6xx_gmu *gmu)
 235 {
 236         u32 val;
 237         int ret;
 238
 239         gmu_write(gmu, REG_A6XX_GMU_HFI_CTRL_INIT, 1);
 240
 241         ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_HFI_CTRL_STATUS, val,
 242                 val & 1, 100, 10000);
 243         if (ret)
 244                 DRM_DEV_ERROR(gmu->dev, "Unable to start the HFI queues\n");
 245
 246         return ret;
 247 }
 248
 249 struct a6xx_gmu_oob_bits {
 250         int set, ack, set_new, ack_new, clear, clear_new;
 251         const char *name;
 252 };
 253
 254 /* These are the interrupt / ack bits for each OOB request that are set
 255  * in a6xx_gmu_set_oob and a6xx_clear_oob
 256  */
 257 static const struct a6xx_gmu_oob_bits a6xx_gmu_oob_bits[] = {
 258         [GMU_OOB_GPU_SET] = {
 259                 .name = "GPU_SET",
 260                 .set = 16,
 261                 .ack = 24,
 262                 .set_new = 30,
 263                 .ack_new = 31,
 264                 .clear = 24,
 265                 .clear_new = 31,
 266         },
 267
 268         [GMU_OOB_PERFCOUNTER_SET] = {
 269                 .name = "PERFCOUNTER",
 270                 .set = 17,
 271                 .ack = 25,
 272                 .set_new = 28,
 273                 .ack_new = 30,
 274                 .clear = 25,
 275                 .clear_new = 29,
 276         },
 277
 278         [GMU_OOB_BOOT_SLUMBER] = {
 279                 .name = "BOOT_SLUMBER",
 280                 .set = 22,
 281                 .ack = 30,
 282                 .clear = 30,
 283         },
 284
 285         [GMU_OOB_DCVS_SET] = {
 286                 .name = "GPU_DCVS",
 287                 .set = 23,
 288                 .ack = 31,
 289                 .clear = 31,
 290         },
 291 };
 292
 293 /* Trigger a OOB (out of band) request to the GMU */
 294 int a6xx_gmu_set_oob(struct a6xx_gmu *gmu, enum a6xx_gmu_oob_state state)
 295 {
 296         int ret;
 297         u32 val;
 298         int request, ack;
 299
 300         WARN_ON_ONCE(!mutex_is_locked(&gmu->lock));
 301
 302         if (state >= ARRAY_SIZE(a6xx_gmu_oob_bits))
 303                 return -EINVAL;
 304
 305         if (gmu->legacy) {
 306                 request = a6xx_gmu_oob_bits[state].set;
 307                 ack = a6xx_gmu_oob_bits[state].ack;
 308         } else {
 309                 request = a6xx_gmu_oob_bits[state].set_new;
 310                 ack = a6xx_gmu_oob_bits[state].ack_new;
 311                 if (!request || !ack) {
 312                         DRM_DEV_ERROR(gmu->dev,
 313                                       "Invalid non-legacy GMU request %s\n",
 314                                       a6xx_gmu_oob_bits[state].name);
 315                         return -EINVAL;
 316                 }
 317         }
 318
 319         /* Trigger the equested OOB operation */
 320         gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET, 1 << request);
 321
 322         /* Wait for the acknowledge interrupt */
 323         ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_GMU2HOST_INTR_INFO, val,
 324                 val & (1 << ack), 100, 10000);
 325
 326         if (ret)
 327                 DRM_DEV_ERROR(gmu->dev,
 328                         "Timeout waiting for GMU OOB set %s: 0x%x\n",
 329                                 a6xx_gmu_oob_bits[state].name,
 330                                 gmu_read(gmu, REG_A6XX_GMU_GMU2HOST_INTR_INFO));
 331
 332         /* Clear the acknowledge interrupt */
 333         gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_CLR, 1 << ack);
 334
 335         return ret;
 336 }
 337
 338 /* Clear a pending OOB state in the GMU */
 339 void a6xx_gmu_clear_oob(struct a6xx_gmu *gmu, enum a6xx_gmu_oob_state state)
 340 {
 341         int bit;
 342
 343         WARN_ON_ONCE(!mutex_is_locked(&gmu->lock));
 344
 345         if (state >= ARRAY_SIZE(a6xx_gmu_oob_bits))
 346                 return;
 347
 348         if (gmu->legacy)
 349                 bit = a6xx_gmu_oob_bits[state].clear;
 350         else
 351                 bit = a6xx_gmu_oob_bits[state].clear_new;
 352
 353         gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET, 1 << bit);
 354 }
 355
 356 /* Enable CPU control of SPTP power power collapse */
 357 static int a6xx_sptprac_enable(struct a6xx_gmu *gmu)
 358 {
 359         int ret;
 360         u32 val;
 361
 362         if (!gmu->legacy)
 363                 return 0;
 364
 365         gmu_write(gmu, REG_A6XX_GMU_GX_SPTPRAC_POWER_CONTROL, 0x778000);
 366
 367         ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS, val,
 368                 (val & 0x38) == 0x28, 1, 100);
 369
 370         if (ret) {
 371                 DRM_DEV_ERROR(gmu->dev, "Unable to power on SPTPRAC: 0x%x\n",
 372                         gmu_read(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS));
 373         }
 374
 375         return 0;
 376 }
 377
 378 /* Disable CPU control of SPTP power power collapse */
 379 static void a6xx_sptprac_disable(struct a6xx_gmu *gmu)
 380 {
 381         u32 val;
 382         int ret;
 383
 384         if (!gmu->legacy)
 385                 return;
 386
 387         /* Make sure retention is on */
 388         gmu_rmw(gmu, REG_A6XX_GPU_CC_GX_GDSCR, 0, (1 << 11));
 389
 390         gmu_write(gmu, REG_A6XX_GMU_GX_SPTPRAC_POWER_CONTROL, 0x778001);
 391
 392         ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS, val,
 393                 (val & 0x04), 100, 10000);
 394
 395         if (ret)
 396                 DRM_DEV_ERROR(gmu->dev, "failed to power off SPTPRAC: 0x%x\n",
 397                         gmu_read(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS));
 398 }
 399
 400 /* Let the GMU know we are starting a boot sequence */
 401 static int a6xx_gmu_gfx_rail_on(struct a6xx_gmu *gmu)
 402 {
 403         u32 vote;
 404
 405         /* Let the GMU know we are getting ready for boot */
 406         gmu_write(gmu, REG_A6XX_GMU_BOOT_SLUMBER_OPTION, 0);
 407
 408         /* Choose the "default" power level as the highest available */
 409         vote = gmu->gx_arc_votes[gmu->nr_gpu_freqs - 1];
 410
 411         gmu_write(gmu, REG_A6XX_GMU_GX_VOTE_IDX, vote & 0xff);
 412         gmu_write(gmu, REG_A6XX_GMU_MX_VOTE_IDX, (vote >> 8) & 0xff);
 413
 414         /* Let the GMU know the boot sequence has started */
 415         return a6xx_gmu_set_oob(gmu, GMU_OOB_BOOT_SLUMBER);
 416 }
 417
 418 /* Let the GMU know that we are about to go into slumber */
 419 static int a6xx_gmu_notify_slumber(struct a6xx_gmu *gmu)
 420 {
 421         int ret;
 422
 423         /* Disable the power counter so the GMU isn't busy */
 424         gmu_write(gmu, REG_A6XX_GMU_CX_GMU_POWER_COUNTER_ENABLE, 0);
 425
 426         /* Disable SPTP_PC if the CPU is responsible for it */
 427         if (gmu->idle_level < GMU_IDLE_STATE_SPTP)
 428                 a6xx_sptprac_disable(gmu);
 429
 430         if (!gmu->legacy) {
 431                 ret = a6xx_hfi_send_prep_slumber(gmu);
 432                 goto out;
 433         }
 434
 435         /* Tell the GMU to get ready to slumber */
 436         gmu_write(gmu, REG_A6XX_GMU_BOOT_SLUMBER_OPTION, 1);
 437
 438         ret = a6xx_gmu_set_oob(gmu, GMU_OOB_BOOT_SLUMBER);
 439         a6xx_gmu_clear_oob(gmu, GMU_OOB_BOOT_SLUMBER);
 440
 441         if (!ret) {
 442                 /* Check to see if the GMU really did slumber */
 443                 if (gmu_read(gmu, REG_A6XX_GPU_GMU_CX_GMU_RPMH_POWER_STATE)
 444                         != 0x0f) {
 445                         DRM_DEV_ERROR(gmu->dev, "The GMU did not go into slumber\n");
 446                         ret = -ETIMEDOUT;
 447                 }
 448         }
 449
 450 out:
 451         /* Put fence into allow mode */
 452         gmu_write(gmu, REG_A6XX_GMU_AO_AHB_FENCE_CTRL, 0);
 453         return ret;
 454 }
 455
 456 static int a6xx_rpmh_start(struct a6xx_gmu *gmu)
 457 {
 458         int ret;
 459         u32 val;
 460
 461         gmu_write(gmu, REG_A6XX_GMU_RSCC_CONTROL_REQ, 1 << 1);
 462         /* Wait for the register to finish posting */
 463         wmb();
 464
 465         ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_RSCC_CONTROL_ACK, val,
 466                 val & (1 << 1), 100, 10000);
 467         if (ret) {
 468                 DRM_DEV_ERROR(gmu->dev, "Unable to power on the GPU RSC\n");
 469                 return ret;
 470         }
 471
 472         ret = gmu_poll_timeout_rscc(gmu, REG_A6XX_RSCC_SEQ_BUSY_DRV0, val,
 473                 !val, 100, 10000);
 474
 475         if (ret) {
 476                 DRM_DEV_ERROR(gmu->dev, "GPU RSC sequence stuck while waking up the GPU\n");
 477                 return ret;
 478         }
 479
 480         gmu_write(gmu, REG_A6XX_GMU_RSCC_CONTROL_REQ, 0);
 481
 482         /* Set up CX GMU counter 0 to count busy ticks */
 483         gmu_write(gmu, REG_A6XX_GPU_GMU_AO_GPU_CX_BUSY_MASK, 0xff000000);
 484         gmu_rmw(gmu, REG_A6XX_GMU_CX_GMU_POWER_COUNTER_SELECT_0, 0xff, 0x20);
 485
 486         /* Enable the power counter */
 487         gmu_write(gmu, REG_A6XX_GMU_CX_GMU_POWER_COUNTER_ENABLE, 1);
 488         return 0;
 489 }
 490
 491 static void a6xx_rpmh_stop(struct a6xx_gmu *gmu)
 492 {
 493         int ret;
 494         u32 val;
 495
 496         gmu_write(gmu, REG_A6XX_GMU_RSCC_CONTROL_REQ, 1);
 497
 498         ret = gmu_poll_timeout_rscc(gmu, REG_A6XX_GPU_RSCC_RSC_STATUS0_DRV0,
 499                 val, val & (1 << 16), 100, 10000);
 500         if (ret)
 501                 DRM_DEV_ERROR(gmu->dev, "Unable to power off the GPU RSC\n");
 502
 503         gmu_write(gmu, REG_A6XX_GMU_RSCC_CONTROL_REQ, 0);
 504 }
 505
 506 static inline void pdc_write(void __iomem *ptr, u32 offset, u32 value)
 507 {
 508         msm_writel(value, ptr + (offset << 2));
 509 }
 510
 511 static void __iomem *a6xx_gmu_get_mmio(struct platform_device *pdev,
 512                 const char *name);
 513
 514 static void a6xx_gmu_rpmh_init(struct a6xx_gmu *gmu)
 515 {
 516         struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
 517         struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
 518         struct platform_device *pdev = to_platform_device(gmu->dev);
 519         void __iomem *pdcptr = a6xx_gmu_get_mmio(pdev, "gmu_pdc");
 520         void __iomem *seqptr = NULL;
 521         uint32_t pdc_address_offset;
 522         bool pdc_in_aop = false;
 523
 524         if (IS_ERR(pdcptr))
 525                 goto err;
 526
 527         if (adreno_is_a650(adreno_gpu) || adreno_is_a660_family(adreno_gpu))
 528                 pdc_in_aop = true;
 529         else if (adreno_is_a618(adreno_gpu) || adreno_is_a640_family(adreno_gpu))
 530                 pdc_address_offset = 0x30090;
 531         else if (adreno_is_a619(adreno_gpu))
 532                 pdc_address_offset = 0x300a0;
 533         else
 534                 pdc_address_offset = 0x30080;
 535
 536         if (!pdc_in_aop) {
 537                 seqptr = a6xx_gmu_get_mmio(pdev, "gmu_pdc_seq");
 538                 if (IS_ERR(seqptr))
 539                         goto err;
 540         }
 541
 542         /* Disable SDE clock gating */
 543         gmu_write_rscc(gmu, REG_A6XX_GPU_RSCC_RSC_STATUS0_DRV0, BIT(24));
 544
 545         /* Setup RSC PDC handshake for sleep and wakeup */
 546         gmu_write_rscc(gmu, REG_A6XX_RSCC_PDC_SLAVE_ID_DRV0, 1);
 547         gmu_write_rscc(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_DATA, 0);
 548         gmu_write_rscc(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_ADDR, 0);
 549         gmu_write_rscc(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_DATA + 2, 0);
 550         gmu_write_rscc(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_ADDR + 2, 0);
 551         gmu_write_rscc(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_DATA + 4, 0x80000000);
 552         gmu_write_rscc(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_ADDR + 4, 0);
 553         gmu_write_rscc(gmu, REG_A6XX_RSCC_OVERRIDE_START_ADDR, 0);
 554         gmu_write_rscc(gmu, REG_A6XX_RSCC_PDC_SEQ_START_ADDR, 0x4520);
 555         gmu_write_rscc(gmu, REG_A6XX_RSCC_PDC_MATCH_VALUE_LO, 0x4510);
 556         gmu_write_rscc(gmu, REG_A6XX_RSCC_PDC_MATCH_VALUE_HI, 0x4514);
 557
 558         /* Load RSC sequencer uCode for sleep and wakeup */
 559         if (adreno_is_a650_family(adreno_gpu)) {
 560                 gmu_write_rscc(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0, 0xeaaae5a0);
 561                 gmu_write_rscc(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 1, 0xe1a1ebab);
 562                 gmu_write_rscc(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 2, 0xa2e0a581);
 563                 gmu_write_rscc(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 3, 0xecac82e2);
 564                 gmu_write_rscc(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 4, 0x0020edad);
 565         } else {
 566                 gmu_write_rscc(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0, 0xa7a506a0);
 567                 gmu_write_rscc(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 1, 0xa1e6a6e7);
 568                 gmu_write_rscc(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 2, 0xa2e081e1);
 569                 gmu_write_rscc(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 3, 0xe9a982e2);
 570                 gmu_write_rscc(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 4, 0x0020e8a8);
 571         }
 572
 573         if (pdc_in_aop)
 574                 goto setup_pdc;
 575
 576         /* Load PDC sequencer uCode for power up and power down sequence */
 577         pdc_write(seqptr, REG_A6XX_PDC_GPU_SEQ_MEM_0, 0xfebea1e1);
 578         pdc_write(seqptr, REG_A6XX_PDC_GPU_SEQ_MEM_0 + 1, 0xa5a4a3a2);
 579         pdc_write(seqptr, REG_A6XX_PDC_GPU_SEQ_MEM_0 + 2, 0x8382a6e0);
 580         pdc_write(seqptr, REG_A6XX_PDC_GPU_SEQ_MEM_0 + 3, 0xbce3e284);
 581         pdc_write(seqptr, REG_A6XX_PDC_GPU_SEQ_MEM_0 + 4, 0x002081fc);
 582
 583         /* Set TCS commands used by PDC sequence for low power modes */
 584         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD_ENABLE_BANK, 7);
 585         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD_WAIT_FOR_CMPL_BANK, 0);
 586         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CONTROL, 0);
 587         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD0_MSGID, 0x10108);
 588         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD0_ADDR, 0x30010);
 589         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD0_DATA, 1);
 590         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD0_MSGID + 4, 0x10108);
 591         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD0_ADDR + 4, 0x30000);
 592         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD0_DATA + 4, 0x0);
 593
 594         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD0_MSGID + 8, 0x10108);
 595         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD0_ADDR + 8, pdc_address_offset);
 596         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS1_CMD0_DATA + 8, 0x0);
 597
 598         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD_ENABLE_BANK, 7);
 599         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD_WAIT_FOR_CMPL_BANK, 0);
 600         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CONTROL, 0);
 601         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD0_MSGID, 0x10108);
 602         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD0_ADDR, 0x30010);
 603         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD0_DATA, 2);
 604
 605         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD0_MSGID + 4, 0x10108);
 606         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD0_ADDR + 4, 0x30000);
 607         if (adreno_is_a618(adreno_gpu) || adreno_is_a619(adreno_gpu) ||
 608                         adreno_is_a650_family(adreno_gpu))
 609                 pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD0_DATA + 4, 0x2);
 610         else
 611                 pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD0_DATA + 4, 0x3);
 612         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD0_MSGID + 8, 0x10108);
 613         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD0_ADDR + 8, pdc_address_offset);
 614         pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD0_DATA + 8, 0x3);
 615
 616         /* Setup GPU PDC */
 617 setup_pdc:
 618         pdc_write(pdcptr, REG_A6XX_PDC_GPU_SEQ_START_ADDR, 0);
 619         pdc_write(pdcptr, REG_A6XX_PDC_GPU_ENABLE_PDC, 0x80000001);
 620
 621         /* ensure no writes happen before the uCode is fully written */
 622         wmb();
 623
 624         a6xx_rpmh_stop(gmu);
 625
 626 err:
 627         if (!IS_ERR_OR_NULL(pdcptr))
 628                 iounmap(pdcptr);
 629         if (!IS_ERR_OR_NULL(seqptr))
 630                 iounmap(seqptr);
 631 }
 632
 633 /*
 634  * The lowest 16 bits of this value are the number of XO clock cycles for main
 635  * hysteresis which is set at 0x1680 cycles (300 us).  The higher 16 bits are
 636  * for the shorter hysteresis that happens after main - this is 0xa (.5 us)
 637  */
 638
 639 #define GMU_PWR_COL_HYST 0x000a1680
 640
 641 /* Set up the idle state for the GMU */
 642 static void a6xx_gmu_power_config(struct a6xx_gmu *gmu)
 643 {
 644         /* Disable GMU WB/RB buffer */
 645         gmu_write(gmu, REG_A6XX_GMU_SYS_BUS_CONFIG, 0x1);
 646         gmu_write(gmu, REG_A6XX_GMU_ICACHE_CONFIG, 0x1);
 647         gmu_write(gmu, REG_A6XX_GMU_DCACHE_CONFIG, 0x1);
 648
 649         gmu_write(gmu, REG_A6XX_GMU_PWR_COL_INTER_FRAME_CTRL, 0x9c40400);
 650
 651         switch (gmu->idle_level) {
 652         case GMU_IDLE_STATE_IFPC:
 653                 gmu_write(gmu, REG_A6XX_GMU_PWR_COL_INTER_FRAME_HYST,
 654                         GMU_PWR_COL_HYST);
 655                 gmu_rmw(gmu, REG_A6XX_GMU_PWR_COL_INTER_FRAME_CTRL, 0,
 656                         A6XX_GMU_PWR_COL_INTER_FRAME_CTRL_IFPC_ENABLE |
 657                         A6XX_GMU_PWR_COL_INTER_FRAME_CTRL_HM_POWER_COLLAPSE_ENABLE);
 658                 fallthrough;
 659         case GMU_IDLE_STATE_SPTP:
 660                 gmu_write(gmu, REG_A6XX_GMU_PWR_COL_SPTPRAC_HYST,
 661                         GMU_PWR_COL_HYST);
 662                 gmu_rmw(gmu, REG_A6XX_GMU_PWR_COL_INTER_FRAME_CTRL, 0,
 663                         A6XX_GMU_PWR_COL_INTER_FRAME_CTRL_IFPC_ENABLE |
 664                         A6XX_GMU_PWR_COL_INTER_FRAME_CTRL_SPTPRAC_POWER_CONTROL_ENABLE);
 665         }
 666
 667         /* Enable RPMh GPU client */
 668         gmu_rmw(gmu, REG_A6XX_GMU_RPMH_CTRL, 0,
 669                 A6XX_GMU_RPMH_CTRL_RPMH_INTERFACE_ENABLE |
 670                 A6XX_GMU_RPMH_CTRL_LLC_VOTE_ENABLE |
 671                 A6XX_GMU_RPMH_CTRL_DDR_VOTE_ENABLE |
 672                 A6XX_GMU_RPMH_CTRL_MX_VOTE_ENABLE |
 673                 A6XX_GMU_RPMH_CTRL_CX_VOTE_ENABLE |
 674                 A6XX_GMU_RPMH_CTRL_GFX_VOTE_ENABLE);
 675 }
 676
 677 struct block_header {
 678         u32 addr;
 679         u32 size;
 680         u32 type;
 681         u32 value;
 682         u32 data[];
 683 };
 684
 685 /* this should be a general kernel helper */
 686 static int in_range(u32 addr, u32 start, u32 size)
 687 {
 688         return addr >= start && addr < start + size;
 689 }
 690
 691 static bool fw_block_mem(struct a6xx_gmu_bo *bo, const struct block_header *blk)
 692 {
 693         if (!in_range(blk->addr, bo->iova, bo->size))
 694                 return false;
 695
 696         memcpy(bo->virt + blk->addr - bo->iova, blk->data, blk->size);
 697         return true;
 698 }
 699
 700 static int a6xx_gmu_fw_load(struct a6xx_gmu *gmu)
 701 {
 702         struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
 703         struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
 704         const struct firmware *fw_image = adreno_gpu->fw[ADRENO_FW_GMU];
 705         const struct block_header *blk;
 706         u32 reg_offset;
 707
 708         u32 itcm_base = 0x00000000;
 709         u32 dtcm_base = 0x00040000;
 710
 711         if (adreno_is_a650_family(adreno_gpu))
 712                 dtcm_base = 0x10004000;
 713
 714         if (gmu->legacy) {
 715                 /* Sanity check the size of the firmware that was loaded */
 716                 if (fw_image->size > 0x8000) {
 717                         DRM_DEV_ERROR(gmu->dev,
 718                                 "GMU firmware is bigger than the available region\n");
 719                         return -EINVAL;
 720                 }
 721
 722                 gmu_write_bulk(gmu, REG_A6XX_GMU_CM3_ITCM_START,
 723                                (u32*) fw_image->data, fw_image->size);
 724                 return 0;
 725         }
 726
 727
 728         for (blk = (const struct block_header *) fw_image->data;
 729              (const u8*) blk < fw_image->data + fw_image->size;
 730              blk = (const struct block_header *) &blk->data[blk->size >> 2]) {
 731                 if (blk->size == 0)
 732                         continue;
 733
 734                 if (in_range(blk->addr, itcm_base, SZ_16K)) {
 735                         reg_offset = (blk->addr - itcm_base) >> 2;
 736                         gmu_write_bulk(gmu,
 737                                 REG_A6XX_GMU_CM3_ITCM_START + reg_offset,
 738                                 blk->data, blk->size);
 739                 } else if (in_range(blk->addr, dtcm_base, SZ_16K)) {
 740                         reg_offset = (blk->addr - dtcm_base) >> 2;
 741                         gmu_write_bulk(gmu,
 742                                 REG_A6XX_GMU_CM3_DTCM_START + reg_offset,
 743                                 blk->data, blk->size);
 744                 } else if (!fw_block_mem(&gmu->icache, blk) &&
 745                            !fw_block_mem(&gmu->dcache, blk) &&
 746                            !fw_block_mem(&gmu->dummy, blk)) {
 747                         DRM_DEV_ERROR(gmu->dev,
 748                                 "failed to match fw block (addr=%.8x size=%d data[0]=%.8x)\n",
 749                                 blk->addr, blk->size, blk->data[0]);
 750                 }
 751         }
 752
 753         return 0;
 754 }
 755
 756 static int a6xx_gmu_fw_start(struct a6xx_gmu *gmu, unsigned int state)
 757 {
 758         struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
 759         struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
 760         int ret;
 761         u32 chipid;
 762
 763         if (adreno_is_a650_family(adreno_gpu)) {
 764                 gmu_write(gmu, REG_A6XX_GPU_GMU_CX_GMU_CX_FALNEXT_INTF, 1);
 765                 gmu_write(gmu, REG_A6XX_GPU_GMU_CX_GMU_CX_FAL_INTF, 1);
 766         }
 767
 768         if (state == GMU_WARM_BOOT) {
 769                 ret = a6xx_rpmh_start(gmu);
 770                 if (ret)
 771                         return ret;
 772         } else {
 773                 if (WARN(!adreno_gpu->fw[ADRENO_FW_GMU],
 774                         "GMU firmware is not loaded\n"))
 775                         return -ENOENT;
 776
 777                 /* Turn on register retention */
 778                 gmu_write(gmu, REG_A6XX_GMU_GENERAL_7, 1);
 779
 780                 ret = a6xx_rpmh_start(gmu);
 781                 if (ret)
 782                         return ret;
 783
 784                 ret = a6xx_gmu_fw_load(gmu);
 785                 if (ret)
 786                         return ret;
 787         }
 788
 789         gmu_write(gmu, REG_A6XX_GMU_CM3_FW_INIT_RESULT, 0);
 790         gmu_write(gmu, REG_A6XX_GMU_CM3_BOOT_CONFIG, 0x02);
 791
 792         /* Write the iova of the HFI table */
 793         gmu_write(gmu, REG_A6XX_GMU_HFI_QTBL_ADDR, gmu->hfi.iova);
 794         gmu_write(gmu, REG_A6XX_GMU_HFI_QTBL_INFO, 1);
 795
 796         gmu_write(gmu, REG_A6XX_GMU_AHB_FENCE_RANGE_0,
 797                 (1 << 31) | (0xa << 18) | (0xa0));
 798
 799         chipid = adreno_gpu->rev.core << 24;
 800         chipid |= adreno_gpu->rev.major << 16;
 801         chipid |= adreno_gpu->rev.minor << 12;
 802         chipid |= adreno_gpu->rev.patchid << 8;
 803
 804         gmu_write(gmu, REG_A6XX_GMU_HFI_SFR_ADDR, chipid);
 805
 806         gmu_write(gmu, REG_A6XX_GPU_GMU_CX_GMU_PWR_COL_CP_MSG,
 807                   gmu->log.iova | (gmu->log.size / SZ_4K - 1));
 808
 809         /* Set up the lowest idle level on the GMU */
 810         a6xx_gmu_power_config(gmu);
 811
 812         ret = a6xx_gmu_start(gmu);
 813         if (ret)
 814                 return ret;
 815
 816         if (gmu->legacy) {
 817                 ret = a6xx_gmu_gfx_rail_on(gmu);
 818                 if (ret)
 819                         return ret;
 820         }
 821
 822         /* Enable SPTP_PC if the CPU is responsible for it */
 823         if (gmu->idle_level < GMU_IDLE_STATE_SPTP) {
 824                 ret = a6xx_sptprac_enable(gmu);
 825                 if (ret)
 826                         return ret;
 827         }
 828
 829         ret = a6xx_gmu_hfi_start(gmu);
 830         if (ret)
 831                 return ret;
 832
 833         /* FIXME: Do we need this wmb() here? */
 834         wmb();
 835
 836         return 0;
 837 }
 838
 839 #define A6XX_HFI_IRQ_MASK \
 840         (A6XX_GMU_GMU2HOST_INTR_INFO_CM3_FAULT)
 841
 842 #define A6XX_GMU_IRQ_MASK \
 843         (A6XX_GMU_AO_HOST_INTERRUPT_STATUS_WDOG_BITE | \
 844          A6XX_GMU_AO_HOST_INTERRUPT_STATUS_HOST_AHB_BUS_ERROR | \
 845          A6XX_GMU_AO_HOST_INTERRUPT_STATUS_FENCE_ERR)
 846
 847 static void a6xx_gmu_irq_disable(struct a6xx_gmu *gmu)
 848 {
 849         disable_irq(gmu->gmu_irq);
 850         disable_irq(gmu->hfi_irq);
 851
 852         gmu_write(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_MASK, ~0);
 853         gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_MASK, ~0);
 854 }
 855
 856 static void a6xx_gmu_rpmh_off(struct a6xx_gmu *gmu)
 857 {
 858         u32 val;
 859
 860         /* Make sure there are no outstanding RPMh votes */
 861         gmu_poll_timeout_rscc(gmu, REG_A6XX_RSCC_TCS0_DRV0_STATUS, val,
 862                 (val & 1), 100, 10000);
 863         gmu_poll_timeout_rscc(gmu, REG_A6XX_RSCC_TCS1_DRV0_STATUS, val,
 864                 (val & 1), 100, 10000);
 865         gmu_poll_timeout_rscc(gmu, REG_A6XX_RSCC_TCS2_DRV0_STATUS, val,
 866                 (val & 1), 100, 10000);
 867         gmu_poll_timeout_rscc(gmu, REG_A6XX_RSCC_TCS3_DRV0_STATUS, val,
 868                 (val & 1), 100, 1000);
 869 }
 870
 871 #define GBIF_CLIENT_HALT_MASK             BIT(0)
 872 #define GBIF_ARB_HALT_MASK                BIT(1)
 873
 874 static void a6xx_bus_clear_pending_transactions(struct adreno_gpu *adreno_gpu,
 875                 bool gx_off)
 876 {
 877         struct msm_gpu *gpu = &adreno_gpu->base;
 878
 879         if (!a6xx_has_gbif(adreno_gpu)) {
 880                 gpu_write(gpu, REG_A6XX_VBIF_XIN_HALT_CTRL0, 0xf);
 881                 spin_until((gpu_read(gpu, REG_A6XX_VBIF_XIN_HALT_CTRL1) &
 882                                                                 0xf) == 0xf);
 883                 gpu_write(gpu, REG_A6XX_VBIF_XIN_HALT_CTRL0, 0);
 884
 885                 return;
 886         }
 887
 888         if (gx_off) {
 889                 /* Halt the gx side of GBIF */
 890                 gpu_write(gpu, REG_A6XX_RBBM_GBIF_HALT, 1);
 891                 spin_until(gpu_read(gpu, REG_A6XX_RBBM_GBIF_HALT_ACK) & 1);
 892         }
 893
 894         /* Halt new client requests on GBIF */
 895         gpu_write(gpu, REG_A6XX_GBIF_HALT, GBIF_CLIENT_HALT_MASK);
 896         spin_until((gpu_read(gpu, REG_A6XX_GBIF_HALT_ACK) &
 897                         (GBIF_CLIENT_HALT_MASK)) == GBIF_CLIENT_HALT_MASK);
 898
 899         /* Halt all AXI requests on GBIF */
 900         gpu_write(gpu, REG_A6XX_GBIF_HALT, GBIF_ARB_HALT_MASK);
 901         spin_until((gpu_read(gpu,  REG_A6XX_GBIF_HALT_ACK) &
 902                         (GBIF_ARB_HALT_MASK)) == GBIF_ARB_HALT_MASK);
 903
 904         /* The GBIF halt needs to be explicitly cleared */
 905         gpu_write(gpu, REG_A6XX_GBIF_HALT, 0x0);
 906 }
 907
 908 /* Force the GMU off in case it isn't responsive */
 909 static void a6xx_gmu_force_off(struct a6xx_gmu *gmu)
 910 {
 911         struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
 912         struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
 913         struct msm_gpu *gpu = &adreno_gpu->base;
 914
 915         /* Flush all the queues */
 916         a6xx_hfi_stop(gmu);
 917
 918         /* Stop the interrupts */
 919         a6xx_gmu_irq_disable(gmu);
 920
 921         /* Force off SPTP in case the GMU is managing it */
 922         a6xx_sptprac_disable(gmu);
 923
 924         /* Make sure there are no outstanding RPMh votes */
 925         a6xx_gmu_rpmh_off(gmu);
 926
 927         /* Halt the gmu cm3 core */
 928         gmu_write(gmu, REG_A6XX_GMU_CM3_SYSRESET, 1);
 929
 930         a6xx_bus_clear_pending_transactions(adreno_gpu, true);
 931
 932         /* Reset GPU core blocks */
 933         gpu_write(gpu, REG_A6XX_RBBM_SW_RESET_CMD, 1);
 934         udelay(100);
 935 }
 936
 937 static void a6xx_gmu_set_initial_freq(struct msm_gpu *gpu, struct a6xx_gmu *gmu)
 938 {
 939         struct dev_pm_opp *gpu_opp;
 940         unsigned long gpu_freq = gmu->gpu_freqs[gmu->current_perf_index];
 941
 942         gpu_opp = dev_pm_opp_find_freq_exact(&gpu->pdev->dev, gpu_freq, true);
 943         if (IS_ERR(gpu_opp))
 944                 return;
 945
 946         gmu->freq = 0; /* so a6xx_gmu_set_freq() doesn't exit early */
 947         a6xx_gmu_set_freq(gpu, gpu_opp, false);
 948         dev_pm_opp_put(gpu_opp);
 949 }
 950
 951 static void a6xx_gmu_set_initial_bw(struct msm_gpu *gpu, struct a6xx_gmu *gmu)
 952 {
 953         struct dev_pm_opp *gpu_opp;
 954         unsigned long gpu_freq = gmu->gpu_freqs[gmu->current_perf_index];
 955
 956         gpu_opp = dev_pm_opp_find_freq_exact(&gpu->pdev->dev, gpu_freq, true);
 957         if (IS_ERR(gpu_opp))
 958                 return;
 959
 960         dev_pm_opp_set_opp(&gpu->pdev->dev, gpu_opp);
 961         dev_pm_opp_put(gpu_opp);
 962 }
 963
 964 int a6xx_gmu_resume(struct a6xx_gpu *a6xx_gpu)
 965 {
 966         struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
 967         struct msm_gpu *gpu = &adreno_gpu->base;
 968         struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
 969         int status, ret;
 970
 971         if (WARN(!gmu->initialized, "The GMU is not set up yet\n"))
 972                 return -EINVAL;
 973
 974         gmu->hung = false;
 975
 976         /* Turn on the resources */
 977         pm_runtime_get_sync(gmu->dev);
 978
 979         /*
 980          * "enable" the GX power domain which won't actually do anything but it
 981          * will make sure that the refcounting is correct in case we need to
 982          * bring down the GX after a GMU failure
 983          */
 984         if (!IS_ERR_OR_NULL(gmu->gxpd))
 985                 pm_runtime_get_sync(gmu->gxpd);
 986
 987         /* Use a known rate to bring up the GMU */
 988         clk_set_rate(gmu->core_clk, 200000000);
 989         clk_set_rate(gmu->hub_clk, 150000000);
 990         ret = clk_bulk_prepare_enable(gmu->nr_clocks, gmu->clocks);
 991         if (ret) {
 992                 pm_runtime_put(gmu->gxpd);
 993                 pm_runtime_put(gmu->dev);
 994                 return ret;
 995         }
 996
 997         /* Set the bus quota to a reasonable value for boot */
 998         a6xx_gmu_set_initial_bw(gpu, gmu);
 999
1000         /* Enable the GMU interrupt */
1001         gmu_write(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_CLR, ~0);
1002         gmu_write(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_MASK, ~A6XX_GMU_IRQ_MASK);
1003         enable_irq(gmu->gmu_irq);
1004
1005         /* Check to see if we are doing a cold or warm boot */
1006         status = gmu_read(gmu, REG_A6XX_GMU_GENERAL_7) == 1 ?
1007                 GMU_WARM_BOOT : GMU_COLD_BOOT;
1008
1009         /*
1010          * Warm boot path does not work on newer GPUs
1011          * Presumably this is because icache/dcache regions must be restored
1012          */
1013         if (!gmu->legacy)
1014                 status = GMU_COLD_BOOT;
1015
1016         ret = a6xx_gmu_fw_start(gmu, status);
1017         if (ret)
1018                 goto out;
1019
1020         ret = a6xx_hfi_start(gmu, status);
1021         if (ret)
1022                 goto out;
1023
1024         /*
1025          * Turn on the GMU firmware fault interrupt after we know the boot
1026          * sequence is successful
1027          */
1028         gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_CLR, ~0);
1029         gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_MASK, ~A6XX_HFI_IRQ_MASK);
1030         enable_irq(gmu->hfi_irq);
1031
1032         /* Set the GPU to the current freq */
1033         a6xx_gmu_set_initial_freq(gpu, gmu);
1034
1035 out:
1036         /* On failure, shut down the GMU to leave it in a good state */
1037         if (ret) {
1038                 disable_irq(gmu->gmu_irq);
1039                 a6xx_rpmh_stop(gmu);
1040                 pm_runtime_put(gmu->gxpd);
1041                 pm_runtime_put(gmu->dev);
1042         }
1043
1044         return ret;
1045 }
1046
1047 bool a6xx_gmu_isidle(struct a6xx_gmu *gmu)
1048 {
1049         u32 reg;
1050
1051         if (!gmu->initialized)
1052                 return true;
1053
1054         reg = gmu_read(gmu, REG_A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS);
1055
1056         if (reg &  A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS_GPUBUSYIGNAHB)
1057                 return false;
1058
1059         return true;
1060 }
1061
1062 /* Gracefully try to shut down the GMU and by extension the GPU */
1063 static void a6xx_gmu_shutdown(struct a6xx_gmu *gmu)
1064 {
1065         struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
1066         struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
1067         u32 val;
1068
1069         /*
1070          * The GMU may still be in slumber unless the GPU started so check and
1071          * skip putting it back into slumber if so
1072          */
1073         val = gmu_read(gmu, REG_A6XX_GPU_GMU_CX_GMU_RPMH_POWER_STATE);
1074
1075         if (val != 0xf) {
1076                 int ret = a6xx_gmu_wait_for_idle(gmu);
1077
1078                 /* If the GMU isn't responding assume it is hung */
1079                 if (ret) {
1080                         a6xx_gmu_force_off(gmu);
1081                         return;
1082                 }
1083
1084                 a6xx_bus_clear_pending_transactions(adreno_gpu, a6xx_gpu->hung);
1085
1086                 /* tell the GMU we want to slumber */
1087                 ret = a6xx_gmu_notify_slumber(gmu);
1088                 if (ret) {
1089                         a6xx_gmu_force_off(gmu);
1090                         return;
1091                 }
1092
1093                 ret = gmu_poll_timeout(gmu,
1094                         REG_A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS, val,
1095                         !(val & A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS_GPUBUSYIGNAHB),
1096                         100, 10000);
1097
1098                 /*
1099                  * Let the user know we failed to slumber but don't worry too
1100                  * much because we are powering down anyway
1101                  */
1102
1103                 if (ret)
1104                         DRM_DEV_ERROR(gmu->dev,
1105                                 "Unable to slumber GMU: status = 0%x/0%x\n",
1106                                 gmu_read(gmu,
1107                                         REG_A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS),
1108                                 gmu_read(gmu,
1109                                         REG_A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS2));
1110         }
1111
1112         /* Turn off HFI */
1113         a6xx_hfi_stop(gmu);
1114
1115         /* Stop the interrupts and mask the hardware */
1116         a6xx_gmu_irq_disable(gmu);
1117
1118         /* Tell RPMh to power off the GPU */
1119         a6xx_rpmh_stop(gmu);
1120 }
1121
1122
1123 int a6xx_gmu_stop(struct a6xx_gpu *a6xx_gpu)
1124 {
1125         struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
1126         struct msm_gpu *gpu = &a6xx_gpu->base.base;
1127
1128         if (!pm_runtime_active(gmu->dev))
1129                 return 0;
1130
1131         /*
1132          * Force the GMU off if we detected a hang, otherwise try to shut it
1133          * down gracefully
1134          */
1135         if (gmu->hung)
1136                 a6xx_gmu_force_off(gmu);
1137         else
1138                 a6xx_gmu_shutdown(gmu);
1139
1140         /* Remove the bus vote */
1141         dev_pm_opp_set_opp(&gpu->pdev->dev, NULL);
1142
1143         /*
1144          * Make sure the GX domain is off before turning off the GMU (CX)
1145          * domain. Usually the GMU does this but only if the shutdown sequence
1146          * was successful
1147          */
1148         if (!IS_ERR_OR_NULL(gmu->gxpd))
1149                 pm_runtime_put_sync(gmu->gxpd);
1150
1151         clk_bulk_disable_unprepare(gmu->nr_clocks, gmu->clocks);
1152
1153         pm_runtime_put_sync(gmu->dev);
1154
1155         return 0;
1156 }
1157
1158 static void a6xx_gmu_memory_free(struct a6xx_gmu *gmu)
1159 {
1160         msm_gem_kernel_put(gmu->hfi.obj, gmu->aspace);
1161         msm_gem_kernel_put(gmu->debug.obj, gmu->aspace);
1162         msm_gem_kernel_put(gmu->icache.obj, gmu->aspace);
1163         msm_gem_kernel_put(gmu->dcache.obj, gmu->aspace);
1164         msm_gem_kernel_put(gmu->dummy.obj, gmu->aspace);
1165         msm_gem_kernel_put(gmu->log.obj, gmu->aspace);
1166
1167         gmu->aspace->mmu->funcs->detach(gmu->aspace->mmu);
1168         msm_gem_address_space_put(gmu->aspace);
1169 }
1170
1171 static int a6xx_gmu_memory_alloc(struct a6xx_gmu *gmu, struct a6xx_gmu_bo *bo,
1172                 size_t size, u64 iova, const char *name)
1173 {
1174         struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
1175         struct drm_device *dev = a6xx_gpu->base.base.dev;
1176         uint32_t flags = MSM_BO_WC;
1177         u64 range_start, range_end;
1178         int ret;
1179
1180         size = PAGE_ALIGN(size);
1181         if (!iova) {
1182                 /* no fixed address - use GMU's uncached range */
1183                 range_start = 0x60000000 + PAGE_SIZE; /* skip dummy page */
1184                 range_end = 0x80000000;
1185         } else {
1186                 /* range for fixed address */
1187                 range_start = iova;
1188                 range_end = iova + size;
1189                 /* use IOMMU_PRIV for icache/dcache */
1190                 flags |= MSM_BO_MAP_PRIV;
1191         }
1192
1193         bo->obj = msm_gem_new(dev, size, flags);
1194         if (IS_ERR(bo->obj))
1195                 return PTR_ERR(bo->obj);
1196
1197         ret = msm_gem_get_and_pin_iova_range(bo->obj, gmu->aspace, &bo->iova,
1198                                              range_start, range_end);
1199         if (ret) {
1200                 drm_gem_object_put(bo->obj);
1201                 return ret;
1202         }
1203
1204         bo->virt = msm_gem_get_vaddr(bo->obj);
1205         bo->size = size;
1206
1207         msm_gem_object_set_name(bo->obj, name);
1208
1209         return 0;
1210 }
1211
1212 static int a6xx_gmu_memory_probe(struct a6xx_gmu *gmu)
1213 {
1214         struct msm_mmu *mmu;
1215
1216         mmu = msm_iommu_new(gmu->dev, 0);
1217         if (!mmu)
1218                 return -ENODEV;
1219         if (IS_ERR(mmu))
1220                 return PTR_ERR(mmu);
1221
1222         gmu->aspace = msm_gem_address_space_create(mmu, "gmu", 0x0, 0x80000000);
1223         if (IS_ERR(gmu->aspace))
1224                 return PTR_ERR(gmu->aspace);
1225
1226         return 0;
1227 }
1228
1229 /* Return the 'arc-level' for the given frequency */
1230 static unsigned int a6xx_gmu_get_arc_level(struct device *dev,
1231                                            unsigned long freq)
1232 {
1233         struct dev_pm_opp *opp;
1234         unsigned int val;
1235
1236         if (!freq)
1237                 return 0;
1238
1239         opp = dev_pm_opp_find_freq_exact(dev, freq, true);
1240         if (IS_ERR(opp))
1241                 return 0;
1242
1243         val = dev_pm_opp_get_level(opp);
1244
1245         dev_pm_opp_put(opp);
1246
1247         return val;
1248 }
1249
1250 static int a6xx_gmu_rpmh_arc_votes_init(struct device *dev, u32 *votes,
1251                 unsigned long *freqs, int freqs_count, const char *id)
1252 {
1253         int i, j;
1254         const u16 *pri, *sec;
1255         size_t pri_count, sec_count;
1256
1257         pri = cmd_db_read_aux_data(id, &pri_count);
1258         if (IS_ERR(pri))
1259                 return PTR_ERR(pri);
1260         /*
1261          * The data comes back as an array of unsigned shorts so adjust the
1262          * count accordingly
1263          */
1264         pri_count >>= 1;
1265         if (!pri_count)
1266                 return -EINVAL;
1267
1268         sec = cmd_db_read_aux_data("mx.lvl", &sec_count);
1269         if (IS_ERR(sec))
1270                 return PTR_ERR(sec);
1271
1272         sec_count >>= 1;
1273         if (!sec_count)
1274                 return -EINVAL;
1275
1276         /* Construct a vote for each frequency */
1277         for (i = 0; i < freqs_count; i++) {
1278                 u8 pindex = 0, sindex = 0;
1279                 unsigned int level = a6xx_gmu_get_arc_level(dev, freqs[i]);
1280
1281                 /* Get the primary index that matches the arc level */
1282                 for (j = 0; j < pri_count; j++) {
1283                         if (pri[j] >= level) {
1284                                 pindex = j;
1285                                 break;
1286                         }
1287                 }
1288
1289                 if (j == pri_count) {
1290                         DRM_DEV_ERROR(dev,
1291                                       "Level %u not found in the RPMh list\n",
1292                                       level);
1293                         DRM_DEV_ERROR(dev, "Available levels:\n");
1294                         for (j = 0; j < pri_count; j++)
1295                                 DRM_DEV_ERROR(dev, "  %u\n", pri[j]);
1296
1297                         return -EINVAL;
1298                 }
1299
1300                 /*
1301                  * Look for a level in in the secondary list that matches. If
1302                  * nothing fits, use the maximum non zero vote
1303                  */
1304
1305                 for (j = 0; j < sec_count; j++) {
1306                         if (sec[j] >= level) {
1307                                 sindex = j;
1308                                 break;
1309                         } else if (sec[j]) {
1310                                 sindex = j;
1311                         }
1312                 }
1313
1314                 /* Construct the vote */
1315                 votes[i] = ((pri[pindex] & 0xffff) << 16) |
1316                         (sindex << 8) | pindex;
1317         }
1318
1319         return 0;
1320 }
1321
1322 /*
1323  * The GMU votes with the RPMh for itself and on behalf of the GPU but we need
1324  * to construct the list of votes on the CPU and send it over. Query the RPMh
1325  * voltage levels and build the votes
1326  */
1327
1328 static int a6xx_gmu_rpmh_votes_init(struct a6xx_gmu *gmu)
1329 {
1330         struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
1331         struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
1332         struct msm_gpu *gpu = &adreno_gpu->base;
1333         int ret;
1334
1335         /* Build the GX votes */
1336         ret = a6xx_gmu_rpmh_arc_votes_init(&gpu->pdev->dev, gmu->gx_arc_votes,
1337                 gmu->gpu_freqs, gmu->nr_gpu_freqs, "gfx.lvl");
1338
1339         /* Build the CX votes */
1340         ret |= a6xx_gmu_rpmh_arc_votes_init(gmu->dev, gmu->cx_arc_votes,
1341                 gmu->gmu_freqs, gmu->nr_gmu_freqs, "cx.lvl");
1342
1343         return ret;
1344 }
1345
1346 static int a6xx_gmu_build_freq_table(struct device *dev, unsigned long *freqs,
1347                 u32 size)
1348 {
1349         int count = dev_pm_opp_get_opp_count(dev);
1350         struct dev_pm_opp *opp;
1351         int i, index = 0;
1352         unsigned long freq = 1;
1353
1354         /*
1355          * The OPP table doesn't contain the "off" frequency level so we need to
1356          * add 1 to the table size to account for it
1357          */
1358
1359         if (WARN(count + 1 > size,
1360                 "The GMU frequency table is being truncated\n"))
1361                 count = size - 1;
1362
1363         /* Set the "off" frequency */
1364         freqs[index++] = 0;
1365
1366         for (i = 0; i < count; i++) {
1367                 opp = dev_pm_opp_find_freq_ceil(dev, &freq);
1368                 if (IS_ERR(opp))
1369                         break;
1370
1371                 dev_pm_opp_put(opp);
1372                 freqs[index++] = freq++;
1373         }
1374
1375         return index;
1376 }
1377
1378 static int a6xx_gmu_pwrlevels_probe(struct a6xx_gmu *gmu)
1379 {
1380         struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
1381         struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
1382         struct msm_gpu *gpu = &adreno_gpu->base;
1383
1384         int ret = 0;
1385
1386         /*
1387          * The GMU handles its own frequency switching so build a list of
1388          * available frequencies to send during initialization
1389          */
1390         ret = devm_pm_opp_of_add_table(gmu->dev);
1391         if (ret) {
1392                 DRM_DEV_ERROR(gmu->dev, "Unable to set the OPP table for the GMU\n");
1393                 return ret;
1394         }
1395
1396         gmu->nr_gmu_freqs = a6xx_gmu_build_freq_table(gmu->dev,
1397                 gmu->gmu_freqs, ARRAY_SIZE(gmu->gmu_freqs));
1398
1399         /*
1400          * The GMU also handles GPU frequency switching so build a list
1401          * from the GPU OPP table
1402          */
1403         gmu->nr_gpu_freqs = a6xx_gmu_build_freq_table(&gpu->pdev->dev,
1404                 gmu->gpu_freqs, ARRAY_SIZE(gmu->gpu_freqs));
1405
1406         gmu->current_perf_index = gmu->nr_gpu_freqs - 1;
1407
1408         /* Build the list of RPMh votes that we'll send to the GMU */
1409         return a6xx_gmu_rpmh_votes_init(gmu);
1410 }
1411
1412 static int a6xx_gmu_clocks_probe(struct a6xx_gmu *gmu)
1413 {
1414         int ret = devm_clk_bulk_get_all(gmu->dev, &gmu->clocks);
1415
1416         if (ret < 1)
1417                 return ret;
1418
1419         gmu->nr_clocks = ret;
1420
1421         gmu->core_clk = msm_clk_bulk_get_clock(gmu->clocks,
1422                 gmu->nr_clocks, "gmu");
1423
1424         gmu->hub_clk = msm_clk_bulk_get_clock(gmu->clocks,
1425                 gmu->nr_clocks, "hub");
1426
1427         return 0;
1428 }
1429
1430 static void __iomem *a6xx_gmu_get_mmio(struct platform_device *pdev,
1431                 const char *name)
1432 {
1433         void __iomem *ret;
1434         struct resource *res = platform_get_resource_byname(pdev,
1435                         IORESOURCE_MEM, name);
1436
1437         if (!res) {
1438                 DRM_DEV_ERROR(&pdev->dev, "Unable to find the %s registers\n", name);
1439                 return ERR_PTR(-EINVAL);
1440         }
1441
1442         ret = ioremap(res->start, resource_size(res));
1443         if (!ret) {
1444                 DRM_DEV_ERROR(&pdev->dev, "Unable to map the %s registers\n", name);
1445                 return ERR_PTR(-EINVAL);
1446         }
1447
1448         return ret;
1449 }
1450
1451 static int a6xx_gmu_get_irq(struct a6xx_gmu *gmu, struct platform_device *pdev,
1452                 const char *name, irq_handler_t handler)
1453 {
1454         int irq, ret;
1455
1456         irq = platform_get_irq_byname(pdev, name);
1457
1458         ret = request_irq(irq, handler, IRQF_TRIGGER_HIGH, name, gmu);
1459         if (ret) {
1460                 DRM_DEV_ERROR(&pdev->dev, "Unable to get interrupt %s %d\n",
1461                               name, ret);
1462                 return ret;
1463         }
1464
1465         disable_irq(irq);
1466
1467         return irq;
1468 }
1469
1470 void a6xx_gmu_remove(struct a6xx_gpu *a6xx_gpu)
1471 {
1472         struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
1473         struct platform_device *pdev = to_platform_device(gmu->dev);
1474
1475         if (!gmu->initialized)
1476                 return;
1477
1478         pm_runtime_force_suspend(gmu->dev);
1479
1480         /*
1481          * Since cxpd is a virt device, the devlink with gmu-dev will be removed
1482          * automatically when we do detach
1483          */
1484         dev_pm_domain_detach(gmu->cxpd, false);
1485
1486         if (!IS_ERR_OR_NULL(gmu->gxpd)) {
1487                 pm_runtime_disable(gmu->gxpd);
1488                 dev_pm_domain_detach(gmu->gxpd, false);
1489         }
1490
1491         iounmap(gmu->mmio);
1492         if (platform_get_resource_byname(pdev, IORESOURCE_MEM, "rscc"))
1493                 iounmap(gmu->rscc);
1494         gmu->mmio = NULL;
1495         gmu->rscc = NULL;
1496
1497         a6xx_gmu_memory_free(gmu);
1498
1499         free_irq(gmu->gmu_irq, gmu);
1500         free_irq(gmu->hfi_irq, gmu);
1501
1502         /* Drop reference taken in of_find_device_by_node */
1503         put_device(gmu->dev);
1504
1505         gmu->initialized = false;
1506 }
1507
1508 static int cxpd_notifier_cb(struct notifier_block *nb,
1509                         unsigned long action, void *data)
1510 {
1511         struct a6xx_gmu *gmu = container_of(nb, struct a6xx_gmu, pd_nb);
1512
1513         if (action == GENPD_NOTIFY_OFF)
1514                 complete_all(&gmu->pd_gate);
1515
1516         return 0;
1517 }
1518
1519 int a6xx_gmu_init(struct a6xx_gpu *a6xx_gpu, struct device_node *node)
1520 {
1521         struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
1522         struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
1523         struct platform_device *pdev = of_find_device_by_node(node);
1524         int ret;
1525
1526         if (!pdev)
1527                 return -ENODEV;
1528
1529         mutex_init(&gmu->lock);
1530
1531         gmu->dev = &pdev->dev;
1532
1533         of_dma_configure(gmu->dev, node, true);
1534
1535         /* Fow now, don't do anything fancy until we get our feet under us */
1536         gmu->idle_level = GMU_IDLE_STATE_ACTIVE;
1537
1538         pm_runtime_enable(gmu->dev);
1539
1540         /* Get the list of clocks */
1541         ret = a6xx_gmu_clocks_probe(gmu);
1542         if (ret)
1543                 goto err_put_device;
1544
1545         ret = a6xx_gmu_memory_probe(gmu);
1546         if (ret)
1547                 goto err_put_device;
1548
1549
1550         /* A660 now requires handling "prealloc requests" in GMU firmware
1551          * For now just hardcode allocations based on the known firmware.
1552          * note: there is no indication that these correspond to "dummy" or
1553          * "debug" regions, but this "guess" allows reusing these BOs which
1554          * are otherwise unused by a660.
1555          */
1556         gmu->dummy.size = SZ_4K;
1557         if (adreno_is_a660_family(adreno_gpu)) {
1558                 ret = a6xx_gmu_memory_alloc(gmu, &gmu->debug, SZ_4K * 7,
1559                                             0x60400000, "debug");
1560                 if (ret)
1561                         goto err_memory;
1562
1563                 gmu->dummy.size = SZ_8K;
1564         }
1565
1566         /* Allocate memory for the GMU dummy page */
1567         ret = a6xx_gmu_memory_alloc(gmu, &gmu->dummy, gmu->dummy.size,
1568                                     0x60000000, "dummy");
1569         if (ret)
1570                 goto err_memory;
1571
1572         /* Note that a650 family also includes a660 family: */
1573         if (adreno_is_a650_family(adreno_gpu)) {
1574                 ret = a6xx_gmu_memory_alloc(gmu, &gmu->icache,
1575                         SZ_16M - SZ_16K, 0x04000, "icache");
1576                 if (ret)
1577                         goto err_memory;
1578         /*
1579          * NOTE: when porting legacy ("pre-650-family") GPUs you may be tempted to add a condition
1580          * to allocate icache/dcache here, as per downstream code flow, but it may not actually be
1581          * necessary. If you omit this step and you don't get random pagefaults, you are likely
1582          * good to go without this!
1583          */
1584         } else if (adreno_is_a640_family(adreno_gpu)) {
1585                 ret = a6xx_gmu_memory_alloc(gmu, &gmu->icache,
1586                         SZ_256K - SZ_16K, 0x04000, "icache");
1587                 if (ret)
1588                         goto err_memory;
1589
1590                 ret = a6xx_gmu_memory_alloc(gmu, &gmu->dcache,
1591                         SZ_256K - SZ_16K, 0x44000, "dcache");
1592                 if (ret)
1593                         goto err_memory;
1594         } else if (adreno_is_a630(adreno_gpu) || adreno_is_a615_family(adreno_gpu)) {
1595                 /* HFI v1, has sptprac */
1596                 gmu->legacy = true;
1597
1598                 /* Allocate memory for the GMU debug region */
1599                 ret = a6xx_gmu_memory_alloc(gmu, &gmu->debug, SZ_16K, 0, "debug");
1600                 if (ret)
1601                         goto err_memory;
1602         }
1603
1604         /* Allocate memory for for the HFI queues */
1605         ret = a6xx_gmu_memory_alloc(gmu, &gmu->hfi, SZ_16K, 0, "hfi");
1606         if (ret)
1607                 goto err_memory;
1608
1609         /* Allocate memory for the GMU log region */
1610         ret = a6xx_gmu_memory_alloc(gmu, &gmu->log, SZ_4K, 0, "log");
1611         if (ret)
1612                 goto err_memory;
1613
1614         /* Map the GMU registers */
1615         gmu->mmio = a6xx_gmu_get_mmio(pdev, "gmu");
1616         if (IS_ERR(gmu->mmio)) {
1617                 ret = PTR_ERR(gmu->mmio);
1618                 goto err_memory;
1619         }
1620
1621         if (adreno_is_a650_family(adreno_gpu)) {
1622                 gmu->rscc = a6xx_gmu_get_mmio(pdev, "rscc");
1623                 if (IS_ERR(gmu->rscc)) {
1624                         ret = -ENODEV;
1625                         goto err_mmio;
1626                 }
1627         } else {
1628                 gmu->rscc = gmu->mmio + 0x23000;
1629         }
1630
1631         /* Get the HFI and GMU interrupts */
1632         gmu->hfi_irq = a6xx_gmu_get_irq(gmu, pdev, "hfi", a6xx_hfi_irq);
1633         gmu->gmu_irq = a6xx_gmu_get_irq(gmu, pdev, "gmu", a6xx_gmu_irq);
1634
1635         if (gmu->hfi_irq < 0 || gmu->gmu_irq < 0) {
1636                 ret = -ENODEV;
1637                 goto err_mmio;
1638         }
1639
1640         gmu->cxpd = dev_pm_domain_attach_by_name(gmu->dev, "cx");
1641         if (IS_ERR(gmu->cxpd)) {
1642                 ret = PTR_ERR(gmu->cxpd);
1643                 goto err_mmio;
1644         }
1645
1646         if (!device_link_add(gmu->dev, gmu->cxpd,
1647                                         DL_FLAG_PM_RUNTIME)) {
1648                 ret = -ENODEV;
1649                 goto detach_cxpd;
1650         }
1651
1652         init_completion(&gmu->pd_gate);
1653         complete_all(&gmu->pd_gate);
1654         gmu->pd_nb.notifier_call = cxpd_notifier_cb;
1655
1656         /*
1657          * Get a link to the GX power domain to reset the GPU in case of GMU
1658          * crash
1659          */
1660         gmu->gxpd = dev_pm_domain_attach_by_name(gmu->dev, "gx");
1661
1662         /* Get the power levels for the GMU and GPU */
1663         a6xx_gmu_pwrlevels_probe(gmu);
1664
1665         /* Set up the HFI queues */
1666         a6xx_hfi_init(gmu);
1667
1668         /* Initialize RPMh */
1669         a6xx_gmu_rpmh_init(gmu);
1670
1671         gmu->initialized = true;
1672
1673         return 0;
1674
1675 detach_cxpd:
1676         dev_pm_domain_detach(gmu->cxpd, false);
1677
1678 err_mmio:
1679         iounmap(gmu->mmio);
1680         if (platform_get_resource_byname(pdev, IORESOURCE_MEM, "rscc"))
1681                 iounmap(gmu->rscc);
1682         free_irq(gmu->gmu_irq, gmu);
1683         free_irq(gmu->hfi_irq, gmu);
1684
1685 err_memory:
1686         a6xx_gmu_memory_free(gmu);
1687 err_put_device:
1688         /* Drop reference taken in of_find_device_by_node */
1689         put_device(gmu->dev);
1690
1691         return ret;
1692 }