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

   1 /*
   2  * Copyright (C) 2013 Red Hat
   3  * Author: Rob Clark <robdclark@gmail.com>
   4  *
   5  * Copyright (c) 2014 The Linux Foundation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 as published by
   9  * the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along with
  17  * this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <linux/ascii85.h>
  21 #include <linux/kernel.h>
  22 #include <linux/pm_opp.h>
  23 #include <linux/slab.h>
  24 #include "adreno_gpu.h"
  25 #include "msm_gem.h"
  26 #include "msm_mmu.h"
  27
  28 int adreno_get_param(struct msm_gpu *gpu, uint32_t param, uint64_t *value)
  29 {
  30         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
  31
  32         switch (param) {
  33         case MSM_PARAM_GPU_ID:
  34                 *value = adreno_gpu->info->revn;
  35                 return 0;
  36         case MSM_PARAM_GMEM_SIZE:
  37                 *value = adreno_gpu->gmem;
  38                 return 0;
  39         case MSM_PARAM_GMEM_BASE:
  40                 *value = 0x100000;
  41                 return 0;
  42         case MSM_PARAM_CHIP_ID:
  43                 *value = adreno_gpu->rev.patchid |
  44                                 (adreno_gpu->rev.minor << 8) |
  45                                 (adreno_gpu->rev.major << 16) |
  46                                 (adreno_gpu->rev.core << 24);
  47                 return 0;
  48         case MSM_PARAM_MAX_FREQ:
  49                 *value = adreno_gpu->base.fast_rate;
  50                 return 0;
  51         case MSM_PARAM_TIMESTAMP:
  52                 if (adreno_gpu->funcs->get_timestamp) {
  53                         int ret;
  54
  55                         pm_runtime_get_sync(&gpu->pdev->dev);
  56                         ret = adreno_gpu->funcs->get_timestamp(gpu, value);
  57                         pm_runtime_put_autosuspend(&gpu->pdev->dev);
  58
  59                         return ret;
  60                 }
  61                 return -EINVAL;
  62         case MSM_PARAM_NR_RINGS:
  63                 *value = gpu->nr_rings;
  64                 return 0;
  65         default:
  66                 DBG("%s: invalid param: %u", gpu->name, param);
  67                 return -EINVAL;
  68         }
  69 }
  70
  71 const struct firmware *
  72 adreno_request_fw(struct adreno_gpu *adreno_gpu, const char *fwname)
  73 {
  74         struct drm_device *drm = adreno_gpu->base.dev;
  75         const struct firmware *fw = NULL;
  76         char *newname;
  77         int ret;
  78
  79         newname = kasprintf(GFP_KERNEL, "qcom/%s", fwname);
  80         if (!newname)
  81                 return ERR_PTR(-ENOMEM);
  82
  83         /*
  84          * Try first to load from qcom/$fwfile using a direct load (to avoid
  85          * a potential timeout waiting for usermode helper)
  86          */
  87         if ((adreno_gpu->fwloc == FW_LOCATION_UNKNOWN) ||
  88             (adreno_gpu->fwloc == FW_LOCATION_NEW)) {
  89
  90                 ret = request_firmware_direct(&fw, newname, drm->dev);
  91                 if (!ret) {
  92                         dev_info(drm->dev, "loaded %s from new location\n",
  93                                 newname);
  94                         adreno_gpu->fwloc = FW_LOCATION_NEW;
  95                         goto out;
  96                 } else if (adreno_gpu->fwloc != FW_LOCATION_UNKNOWN) {
  97                         dev_err(drm->dev, "failed to load %s: %d\n",
  98                                 newname, ret);
  99                         fw = ERR_PTR(ret);
 100                         goto out;
 101                 }
 102         }
 103
 104         /*
 105          * Then try the legacy location without qcom/ prefix
 106          */
 107         if ((adreno_gpu->fwloc == FW_LOCATION_UNKNOWN) ||
 108             (adreno_gpu->fwloc == FW_LOCATION_LEGACY)) {
 109
 110                 ret = request_firmware_direct(&fw, fwname, drm->dev);
 111                 if (!ret) {
 112                         dev_info(drm->dev, "loaded %s from legacy location\n",
 113                                 newname);
 114                         adreno_gpu->fwloc = FW_LOCATION_LEGACY;
 115                         goto out;
 116                 } else if (adreno_gpu->fwloc != FW_LOCATION_UNKNOWN) {
 117                         dev_err(drm->dev, "failed to load %s: %d\n",
 118                                 fwname, ret);
 119                         fw = ERR_PTR(ret);
 120                         goto out;
 121                 }
 122         }
 123
 124         /*
 125          * Finally fall back to request_firmware() for cases where the
 126          * usermode helper is needed (I think mainly android)
 127          */
 128         if ((adreno_gpu->fwloc == FW_LOCATION_UNKNOWN) ||
 129             (adreno_gpu->fwloc == FW_LOCATION_HELPER)) {
 130
 131                 ret = request_firmware(&fw, newname, drm->dev);
 132                 if (!ret) {
 133                         dev_info(drm->dev, "loaded %s with helper\n",
 134                                 newname);
 135                         adreno_gpu->fwloc = FW_LOCATION_HELPER;
 136                         goto out;
 137                 } else if (adreno_gpu->fwloc != FW_LOCATION_UNKNOWN) {
 138                         dev_err(drm->dev, "failed to load %s: %d\n",
 139                                 newname, ret);
 140                         fw = ERR_PTR(ret);
 141                         goto out;
 142                 }
 143         }
 144
 145         dev_err(drm->dev, "failed to load %s\n", fwname);
 146         fw = ERR_PTR(-ENOENT);
 147 out:
 148         kfree(newname);
 149         return fw;
 150 }
 151
 152 int adreno_load_fw(struct adreno_gpu *adreno_gpu)
 153 {
 154         int i;
 155
 156         for (i = 0; i < ARRAY_SIZE(adreno_gpu->info->fw); i++) {
 157                 const struct firmware *fw;
 158
 159                 if (!adreno_gpu->info->fw[i])
 160                         continue;
 161
 162                 /* Skip if the firmware has already been loaded */
 163                 if (adreno_gpu->fw[i])
 164                         continue;
 165
 166                 fw = adreno_request_fw(adreno_gpu, adreno_gpu->info->fw[i]);
 167                 if (IS_ERR(fw))
 168                         return PTR_ERR(fw);
 169
 170                 adreno_gpu->fw[i] = fw;
 171         }
 172
 173         return 0;
 174 }
 175
 176 struct drm_gem_object *adreno_fw_create_bo(struct msm_gpu *gpu,
 177                 const struct firmware *fw, u64 *iova)
 178 {
 179         struct drm_gem_object *bo;
 180         void *ptr;
 181
 182         ptr = msm_gem_kernel_new_locked(gpu->dev, fw->size - 4,
 183                 MSM_BO_UNCACHED | MSM_BO_GPU_READONLY, gpu->aspace, &bo, iova);
 184
 185         if (IS_ERR(ptr))
 186                 return ERR_CAST(ptr);
 187
 188         memcpy(ptr, &fw->data[4], fw->size - 4);
 189
 190         msm_gem_put_vaddr(bo);
 191
 192         return bo;
 193 }
 194
 195 int adreno_hw_init(struct msm_gpu *gpu)
 196 {
 197         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 198         int ret, i;
 199
 200         DBG("%s", gpu->name);
 201
 202         ret = adreno_load_fw(adreno_gpu);
 203         if (ret)
 204                 return ret;
 205
 206         for (i = 0; i < gpu->nr_rings; i++) {
 207                 struct msm_ringbuffer *ring = gpu->rb[i];
 208
 209                 if (!ring)
 210                         continue;
 211
 212                 ret = msm_gem_get_iova(ring->bo, gpu->aspace, &ring->iova);
 213                 if (ret) {
 214                         ring->iova = 0;
 215                         dev_err(gpu->dev->dev,
 216                                 "could not map ringbuffer %d: %d\n", i, ret);
 217                         return ret;
 218                 }
 219
 220                 ring->cur = ring->start;
 221                 ring->next = ring->start;
 222
 223                 /* reset completed fence seqno: */
 224                 ring->memptrs->fence = ring->seqno;
 225                 ring->memptrs->rptr = 0;
 226         }
 227
 228         /*
 229          * Setup REG_CP_RB_CNTL.  The same value is used across targets (with
 230          * the excpetion of A430 that disables the RPTR shadow) - the cacluation
 231          * for the ringbuffer size and block size is moved to msm_gpu.h for the
 232          * pre-processor to deal with and the A430 variant is ORed in here
 233          */
 234         adreno_gpu_write(adreno_gpu, REG_ADRENO_CP_RB_CNTL,
 235                 MSM_GPU_RB_CNTL_DEFAULT |
 236                 (adreno_is_a430(adreno_gpu) ? AXXX_CP_RB_CNTL_NO_UPDATE : 0));
 237
 238         /* Setup ringbuffer address - use ringbuffer[0] for GPU init */
 239         adreno_gpu_write64(adreno_gpu, REG_ADRENO_CP_RB_BASE,
 240                 REG_ADRENO_CP_RB_BASE_HI, gpu->rb[0]->iova);
 241
 242         if (!adreno_is_a430(adreno_gpu)) {
 243                 adreno_gpu_write64(adreno_gpu, REG_ADRENO_CP_RB_RPTR_ADDR,
 244                         REG_ADRENO_CP_RB_RPTR_ADDR_HI,
 245                         rbmemptr(gpu->rb[0], rptr));
 246         }
 247
 248         return 0;
 249 }
 250
 251 /* Use this helper to read rptr, since a430 doesn't update rptr in memory */
 252 static uint32_t get_rptr(struct adreno_gpu *adreno_gpu,
 253                 struct msm_ringbuffer *ring)
 254 {
 255         if (adreno_is_a430(adreno_gpu))
 256                 return ring->memptrs->rptr = adreno_gpu_read(
 257                         adreno_gpu, REG_ADRENO_CP_RB_RPTR);
 258         else
 259                 return ring->memptrs->rptr;
 260 }
 261
 262 struct msm_ringbuffer *adreno_active_ring(struct msm_gpu *gpu)
 263 {
 264         return gpu->rb[0];
 265 }
 266
 267 void adreno_recover(struct msm_gpu *gpu)
 268 {
 269         struct drm_device *dev = gpu->dev;
 270         int ret;
 271
 272         // XXX pm-runtime??  we *need* the device to be off after this
 273         // so maybe continuing to call ->pm_suspend/resume() is better?
 274
 275         gpu->funcs->pm_suspend(gpu);
 276         gpu->funcs->pm_resume(gpu);
 277
 278         ret = msm_gpu_hw_init(gpu);
 279         if (ret) {
 280                 dev_err(dev->dev, "gpu hw init failed: %d\n", ret);
 281                 /* hmm, oh well? */
 282         }
 283 }
 284
 285 void adreno_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
 286                 struct msm_file_private *ctx)
 287 {
 288         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 289         struct msm_drm_private *priv = gpu->dev->dev_private;
 290         struct msm_ringbuffer *ring = submit->ring;
 291         unsigned i;
 292
 293         for (i = 0; i < submit->nr_cmds; i++) {
 294                 switch (submit->cmd[i].type) {
 295                 case MSM_SUBMIT_CMD_IB_TARGET_BUF:
 296                         /* ignore IB-targets */
 297                         break;
 298                 case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
 299                         /* ignore if there has not been a ctx switch: */
 300                         if (priv->lastctx == ctx)
 301                                 break;
 302                 case MSM_SUBMIT_CMD_BUF:
 303                         OUT_PKT3(ring, adreno_is_a430(adreno_gpu) ?
 304                                 CP_INDIRECT_BUFFER_PFE : CP_INDIRECT_BUFFER_PFD, 2);
 305                         OUT_RING(ring, lower_32_bits(submit->cmd[i].iova));
 306                         OUT_RING(ring, submit->cmd[i].size);
 307                         OUT_PKT2(ring);
 308                         break;
 309                 }
 310         }
 311
 312         OUT_PKT0(ring, REG_AXXX_CP_SCRATCH_REG2, 1);
 313         OUT_RING(ring, submit->seqno);
 314
 315         if (adreno_is_a3xx(adreno_gpu) || adreno_is_a4xx(adreno_gpu)) {
 316                 /* Flush HLSQ lazy updates to make sure there is nothing
 317                  * pending for indirect loads after the timestamp has
 318                  * passed:
 319                  */
 320                 OUT_PKT3(ring, CP_EVENT_WRITE, 1);
 321                 OUT_RING(ring, HLSQ_FLUSH);
 322
 323                 OUT_PKT3(ring, CP_WAIT_FOR_IDLE, 1);
 324                 OUT_RING(ring, 0x00000000);
 325         }
 326
 327         /* BIT(31) of CACHE_FLUSH_TS triggers CACHE_FLUSH_TS IRQ from GPU */
 328         OUT_PKT3(ring, CP_EVENT_WRITE, 3);
 329         OUT_RING(ring, CACHE_FLUSH_TS | BIT(31));
 330         OUT_RING(ring, rbmemptr(ring, fence));
 331         OUT_RING(ring, submit->seqno);
 332
 333 #if 0
 334         if (adreno_is_a3xx(adreno_gpu)) {
 335                 /* Dummy set-constant to trigger context rollover */
 336                 OUT_PKT3(ring, CP_SET_CONSTANT, 2);
 337                 OUT_RING(ring, CP_REG(REG_A3XX_HLSQ_CL_KERNEL_GROUP_X_REG));
 338                 OUT_RING(ring, 0x00000000);
 339         }
 340 #endif
 341
 342         gpu->funcs->flush(gpu, ring);
 343 }
 344
 345 void adreno_flush(struct msm_gpu *gpu, struct msm_ringbuffer *ring)
 346 {
 347         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 348         uint32_t wptr;
 349
 350         /* Copy the shadow to the actual register */
 351         ring->cur = ring->next;
 352
 353         /*
 354          * Mask wptr value that we calculate to fit in the HW range. This is
 355          * to account for the possibility that the last command fit exactly into
 356          * the ringbuffer and rb->next hasn't wrapped to zero yet
 357          */
 358         wptr = get_wptr(ring);
 359
 360         /* ensure writes to ringbuffer have hit system memory: */
 361         mb();
 362
 363         adreno_gpu_write(adreno_gpu, REG_ADRENO_CP_RB_WPTR, wptr);
 364 }
 365
 366 bool adreno_idle(struct msm_gpu *gpu, struct msm_ringbuffer *ring)
 367 {
 368         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 369         uint32_t wptr = get_wptr(ring);
 370
 371         /* wait for CP to drain ringbuffer: */
 372         if (!spin_until(get_rptr(adreno_gpu, ring) == wptr))
 373                 return true;
 374
 375         /* TODO maybe we need to reset GPU here to recover from hang? */
 376         DRM_ERROR("%s: timeout waiting to drain ringbuffer %d rptr/wptr = %X/%X\n",
 377                 gpu->name, ring->id, get_rptr(adreno_gpu, ring), wptr);
 378
 379         return false;
 380 }
 381
 382 int adreno_gpu_state_get(struct msm_gpu *gpu, struct msm_gpu_state *state)
 383 {
 384         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 385         int i, count = 0;
 386
 387         kref_init(&state->ref);
 388
 389         ktime_get_real_ts64(&state->time);
 390
 391         for (i = 0; i < gpu->nr_rings; i++) {
 392                 int size = 0, j;
 393
 394                 state->ring[i].fence = gpu->rb[i]->memptrs->fence;
 395                 state->ring[i].iova = gpu->rb[i]->iova;
 396                 state->ring[i].seqno = gpu->rb[i]->seqno;
 397                 state->ring[i].rptr = get_rptr(adreno_gpu, gpu->rb[i]);
 398                 state->ring[i].wptr = get_wptr(gpu->rb[i]);
 399
 400                 /* Copy at least 'wptr' dwords of the data */
 401                 size = state->ring[i].wptr;
 402
 403                 /* After wptr find the last non zero dword to save space */
 404                 for (j = state->ring[i].wptr; j < MSM_GPU_RINGBUFFER_SZ >> 2; j++)
 405                         if (gpu->rb[i]->start[j])
 406                                 size = j + 1;
 407
 408                 if (size) {
 409                         state->ring[i].data = kmalloc(size << 2, GFP_KERNEL);
 410                         if (state->ring[i].data) {
 411                                 memcpy(state->ring[i].data, gpu->rb[i]->start, size << 2);
 412                                 state->ring[i].data_size = size << 2;
 413                         }
 414                 }
 415         }
 416
 417         /* Count the number of registers */
 418         for (i = 0; adreno_gpu->registers[i] != ~0; i += 2)
 419                 count += adreno_gpu->registers[i + 1] -
 420                         adreno_gpu->registers[i] + 1;
 421
 422         state->registers = kcalloc(count * 2, sizeof(u32), GFP_KERNEL);
 423         if (state->registers) {
 424                 int pos = 0;
 425
 426                 for (i = 0; adreno_gpu->registers[i] != ~0; i += 2) {
 427                         u32 start = adreno_gpu->registers[i];
 428                         u32 end   = adreno_gpu->registers[i + 1];
 429                         u32 addr;
 430
 431                         for (addr = start; addr <= end; addr++) {
 432                                 state->registers[pos++] = addr;
 433                                 state->registers[pos++] = gpu_read(gpu, addr);
 434                         }
 435                 }
 436
 437                 state->nr_registers = count;
 438         }
 439
 440         return 0;
 441 }
 442
 443 void adreno_gpu_state_destroy(struct msm_gpu_state *state)
 444 {
 445         int i;
 446
 447         for (i = 0; i < ARRAY_SIZE(state->ring); i++)
 448                 kfree(state->ring[i].data);
 449
 450         for (i = 0; state->bos && i < state->nr_bos; i++)
 451                 kvfree(state->bos[i].data);
 452
 453         kfree(state->bos);
 454         kfree(state->comm);
 455         kfree(state->cmd);
 456         kfree(state->registers);
 457 }
 458
 459 static void adreno_gpu_state_kref_destroy(struct kref *kref)
 460 {
 461         struct msm_gpu_state *state = container_of(kref,
 462                 struct msm_gpu_state, ref);
 463
 464         adreno_gpu_state_destroy(state);
 465         kfree(state);
 466 }
 467
 468 int adreno_gpu_state_put(struct msm_gpu_state *state)
 469 {
 470         if (IS_ERR_OR_NULL(state))
 471                 return 1;
 472
 473         return kref_put(&state->ref, adreno_gpu_state_kref_destroy);
 474 }
 475
 476 #if defined(CONFIG_DEBUG_FS) || defined(CONFIG_DEV_COREDUMP)
 477
 478 static void adreno_show_object(struct drm_printer *p, u32 *ptr, int len)
 479 {
 480         char out[ASCII85_BUFSZ];
 481         long l, datalen, i;
 482
 483         if (!ptr || !len)
 484                 return;
 485
 486         /*
 487          * Only dump the non-zero part of the buffer - rarely will any data
 488          * completely fill the entire allocated size of the buffer
 489          */
 490         for (datalen = 0, i = 0; i < len >> 2; i++) {
 491                 if (ptr[i])
 492                         datalen = (i << 2) + 1;
 493         }
 494
 495         /* Skip printing the object if it is empty */
 496         if (datalen == 0)
 497                 return;
 498
 499         l = ascii85_encode_len(datalen);
 500
 501         drm_puts(p, "    data: !!ascii85 |\n");
 502         drm_puts(p, "     ");
 503
 504         for (i = 0; i < l; i++)
 505                 drm_puts(p, ascii85_encode(ptr[i], out));
 506
 507         drm_puts(p, "\n");
 508 }
 509
 510 void adreno_show(struct msm_gpu *gpu, struct msm_gpu_state *state,
 511                 struct drm_printer *p)
 512 {
 513         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 514         int i;
 515
 516         if (IS_ERR_OR_NULL(state))
 517                 return;
 518
 519         drm_printf(p, "revision: %d (%d.%d.%d.%d)\n",
 520                         adreno_gpu->info->revn, adreno_gpu->rev.core,
 521                         adreno_gpu->rev.major, adreno_gpu->rev.minor,
 522                         adreno_gpu->rev.patchid);
 523
 524         drm_printf(p, "rbbm-status: 0x%08x\n", state->rbbm_status);
 525
 526         drm_puts(p, "ringbuffer:\n");
 527
 528         for (i = 0; i < gpu->nr_rings; i++) {
 529                 drm_printf(p, "  - id: %d\n", i);
 530                 drm_printf(p, "    iova: 0x%016llx\n", state->ring[i].iova);
 531                 drm_printf(p, "    last-fence: %d\n", state->ring[i].seqno);
 532                 drm_printf(p, "    retired-fence: %d\n", state->ring[i].fence);
 533                 drm_printf(p, "    rptr: %d\n", state->ring[i].rptr);
 534                 drm_printf(p, "    wptr: %d\n", state->ring[i].wptr);
 535                 drm_printf(p, "    size: %d\n", MSM_GPU_RINGBUFFER_SZ);
 536
 537                 adreno_show_object(p, state->ring[i].data,
 538                         state->ring[i].data_size);
 539         }
 540
 541         if (state->bos) {
 542                 drm_puts(p, "bos:\n");
 543
 544                 for (i = 0; i < state->nr_bos; i++) {
 545                         drm_printf(p, "  - iova: 0x%016llx\n",
 546                                 state->bos[i].iova);
 547                         drm_printf(p, "    size: %zd\n", state->bos[i].size);
 548
 549                         adreno_show_object(p, state->bos[i].data,
 550                                 state->bos[i].size);
 551                 }
 552         }
 553
 554         drm_puts(p, "registers:\n");
 555
 556         for (i = 0; i < state->nr_registers; i++) {
 557                 drm_printf(p, "  - { offset: 0x%04x, value: 0x%08x }\n",
 558                         state->registers[i * 2] << 2,
 559                         state->registers[(i * 2) + 1]);
 560         }
 561 }
 562 #endif
 563
 564 /* Dump common gpu status and scratch registers on any hang, to make
 565  * the hangcheck logs more useful.  The scratch registers seem always
 566  * safe to read when GPU has hung (unlike some other regs, depending
 567  * on how the GPU hung), and they are useful to match up to cmdstream
 568  * dumps when debugging hangs:
 569  */
 570 void adreno_dump_info(struct msm_gpu *gpu)
 571 {
 572         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 573         int i;
 574
 575         printk("revision: %d (%d.%d.%d.%d)\n",
 576                         adreno_gpu->info->revn, adreno_gpu->rev.core,
 577                         adreno_gpu->rev.major, adreno_gpu->rev.minor,
 578                         adreno_gpu->rev.patchid);
 579
 580         for (i = 0; i < gpu->nr_rings; i++) {
 581                 struct msm_ringbuffer *ring = gpu->rb[i];
 582
 583                 printk("rb %d: fence:    %d/%d\n", i,
 584                         ring->memptrs->fence,
 585                         ring->seqno);
 586
 587                 printk("rptr:     %d\n", get_rptr(adreno_gpu, ring));
 588                 printk("rb wptr:  %d\n", get_wptr(ring));
 589         }
 590 }
 591
 592 /* would be nice to not have to duplicate the _show() stuff with printk(): */
 593 void adreno_dump(struct msm_gpu *gpu)
 594 {
 595         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 596         int i;
 597
 598         /* dump these out in a form that can be parsed by demsm: */
 599         printk("IO:region %s 00000000 00020000\n", gpu->name);
 600         for (i = 0; adreno_gpu->registers[i] != ~0; i += 2) {
 601                 uint32_t start = adreno_gpu->registers[i];
 602                 uint32_t end   = adreno_gpu->registers[i+1];
 603                 uint32_t addr;
 604
 605                 for (addr = start; addr <= end; addr++) {
 606                         uint32_t val = gpu_read(gpu, addr);
 607                         printk("IO:R %08x %08x\n", addr<<2, val);
 608                 }
 609         }
 610 }
 611
 612 static uint32_t ring_freewords(struct msm_ringbuffer *ring)
 613 {
 614         struct adreno_gpu *adreno_gpu = to_adreno_gpu(ring->gpu);
 615         uint32_t size = MSM_GPU_RINGBUFFER_SZ >> 2;
 616         /* Use ring->next to calculate free size */
 617         uint32_t wptr = ring->next - ring->start;
 618         uint32_t rptr = get_rptr(adreno_gpu, ring);
 619         return (rptr + (size - 1) - wptr) % size;
 620 }
 621
 622 void adreno_wait_ring(struct msm_ringbuffer *ring, uint32_t ndwords)
 623 {
 624         if (spin_until(ring_freewords(ring) >= ndwords))
 625                 DRM_DEV_ERROR(ring->gpu->dev->dev,
 626                         "timeout waiting for space in ringbuffer %d\n",
 627                         ring->id);
 628 }
 629
 630 /* Get legacy powerlevels from qcom,gpu-pwrlevels and populate the opp table */
 631 static int adreno_get_legacy_pwrlevels(struct device *dev)
 632 {
 633         struct device_node *child, *node;
 634         int ret;
 635
 636         node = of_get_compatible_child(dev->of_node, "qcom,gpu-pwrlevels");
 637         if (!node) {
 638                 dev_err(dev, "Could not find the GPU powerlevels\n");
 639                 return -ENXIO;
 640         }
 641
 642         for_each_child_of_node(node, child) {
 643                 unsigned int val;
 644
 645                 ret = of_property_read_u32(child, "qcom,gpu-freq", &val);
 646                 if (ret)
 647                         continue;
 648
 649                 /*
 650                  * Skip the intentionally bogus clock value found at the bottom
 651                  * of most legacy frequency tables
 652                  */
 653                 if (val != 27000000)
 654                         dev_pm_opp_add(dev, val, 0);
 655         }
 656
 657         of_node_put(node);
 658
 659         return 0;
 660 }
 661
 662 static int adreno_get_pwrlevels(struct device *dev,
 663                 struct msm_gpu *gpu)
 664 {
 665         unsigned long freq = ULONG_MAX;
 666         struct dev_pm_opp *opp;
 667         int ret;
 668
 669         gpu->fast_rate = 0;
 670
 671         /* You down with OPP? */
 672         if (!of_find_property(dev->of_node, "operating-points-v2", NULL))
 673                 ret = adreno_get_legacy_pwrlevels(dev);
 674         else {
 675                 ret = dev_pm_opp_of_add_table(dev);
 676                 if (ret)
 677                         dev_err(dev, "Unable to set the OPP table\n");
 678         }
 679
 680         if (!ret) {
 681                 /* Find the fastest defined rate */
 682                 opp = dev_pm_opp_find_freq_floor(dev, &freq);
 683                 if (!IS_ERR(opp)) {
 684                         gpu->fast_rate = freq;
 685                         dev_pm_opp_put(opp);
 686                 }
 687         }
 688
 689         if (!gpu->fast_rate) {
 690                 dev_warn(dev,
 691                         "Could not find a clock rate. Using a reasonable default\n");
 692                 /* Pick a suitably safe clock speed for any target */
 693                 gpu->fast_rate = 200000000;
 694         }
 695
 696         DBG("fast_rate=%u, slow_rate=27000000", gpu->fast_rate);
 697
 698         return 0;
 699 }
 700
 701 int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 702                 struct adreno_gpu *adreno_gpu,
 703                 const struct adreno_gpu_funcs *funcs, int nr_rings)
 704 {
 705         struct adreno_platform_config *config = pdev->dev.platform_data;
 706         struct msm_gpu_config adreno_gpu_config  = { 0 };
 707         struct msm_gpu *gpu = &adreno_gpu->base;
 708
 709         adreno_gpu->funcs = funcs;
 710         adreno_gpu->info = adreno_info(config->rev);
 711         adreno_gpu->gmem = adreno_gpu->info->gmem;
 712         adreno_gpu->revn = adreno_gpu->info->revn;
 713         adreno_gpu->rev = config->rev;
 714
 715         adreno_gpu_config.ioname = "kgsl_3d0_reg_memory";
 716         adreno_gpu_config.irqname = "kgsl_3d0_irq";
 717
 718         adreno_gpu_config.va_start = SZ_16M;
 719         adreno_gpu_config.va_end = 0xffffffff;
 720
 721         adreno_gpu_config.nr_rings = nr_rings;
 722
 723         adreno_get_pwrlevels(&pdev->dev, gpu);
 724
 725         pm_runtime_set_autosuspend_delay(&pdev->dev,
 726                 adreno_gpu->info->inactive_period);
 727         pm_runtime_use_autosuspend(&pdev->dev);
 728         pm_runtime_enable(&pdev->dev);
 729
 730         return msm_gpu_init(drm, pdev, &adreno_gpu->base, &funcs->base,
 731                         adreno_gpu->info->name, &adreno_gpu_config);
 732 }
 733
 734 void adreno_gpu_cleanup(struct adreno_gpu *adreno_gpu)
 735 {
 736         unsigned int i;
 737
 738         for (i = 0; i < ARRAY_SIZE(adreno_gpu->info->fw); i++)
 739                 release_firmware(adreno_gpu->fw[i]);
 740
 741         msm_gpu_cleanup(&adreno_gpu->base);
 742 }