1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2013 Red Hat
4 * Author: Rob Clark <robdclark@gmail.com>
5 *
6 * Copyright (c) 2014 The Linux Foundation. All rights reserved.
7 */
8
9#include <linux/ascii85.h>
10#include <linux/interconnect.h>
11#include <linux/firmware/qcom/qcom_scm.h>
12#include <linux/kernel.h>
13#include <linux/of_address.h>
14#include <linux/pm_opp.h>
15#include <linux/slab.h>
16#include <linux/soc/qcom/mdt_loader.h>
17#include <linux/nvmem-consumer.h>
18#include <soc/qcom/ocmem.h>
19#include "adreno_gpu.h"
20#include "a6xx_gpu.h"
21#include "msm_gem.h"
22#include "msm_mmu.h"
23
24static u64 address_space_size = 0;
25MODULE_PARM_DESC(address_space_size, "Override for size of processes private GPU address space");
26module_param(address_space_size, ullong, 0600);
27
28static bool zap_available = true;
29
30static int zap_shader_load_mdt(struct msm_gpu *gpu, const char *fwname,
31 u32 pasid)
32{
33 struct device *dev = &gpu->pdev->dev;
34 const struct firmware *fw;
35 const char *signed_fwname = NULL;
36 struct device_node *np, *mem_np;
37 struct resource r;
38 phys_addr_t mem_phys;
39 ssize_t mem_size;
40 void *mem_region = NULL;
41 int ret;
42
43 if (!IS_ENABLED(CONFIG_ARCH_QCOM)) {
44 zap_available = false;
45 return -EINVAL;
46 }
47
48 np = of_get_child_by_name(node: dev->of_node, name: "zap-shader");
49 if (!np) {
50 zap_available = false;
51 return -ENODEV;
52 }
53
54 mem_np = of_parse_phandle(np, phandle_name: "memory-region", index: 0);
55 of_node_put(node: np);
56 if (!mem_np) {
57 zap_available = false;
58 return -EINVAL;
59 }
60
61 ret = of_address_to_resource(dev: mem_np, index: 0, r: &r);
62 of_node_put(node: mem_np);
63 if (ret)
64 return ret;
65
66 mem_phys = r.start;
67
68 /*
69 * Check for a firmware-name property. This is the new scheme
70 * to handle firmware that may be signed with device specific
71 * keys, allowing us to have a different zap fw path for different
72 * devices.
73 *
74 * If the firmware-name property is found, we bypass the
75 * adreno_request_fw() mechanism, because we don't need to handle
76 * the /lib/firmware/qcom/... vs /lib/firmware/... case.
77 *
78 * If the firmware-name property is not found, for backwards
79 * compatibility we fall back to the fwname from the gpulist
80 * table.
81 */
82 of_property_read_string_index(np, propname: "firmware-name", index: 0, output: &signed_fwname);
83 if (signed_fwname) {
84 fwname = signed_fwname;
85 ret = request_firmware_direct(fw: &fw, name: fwname, device: gpu->dev->dev);
86 if (ret)
87 fw = ERR_PTR(error: ret);
88 } else if (fwname) {
89 /* Request the MDT file from the default location: */
90 fw = adreno_request_fw(to_adreno_gpu(gpu), fwname);
91 } else {
92 /*
93 * For new targets, we require the firmware-name property,
94 * if a zap-shader is required, rather than falling back
95 * to a firmware name specified in gpulist.
96 *
97 * Because the firmware is signed with a (potentially)
98 * device specific key, having the name come from gpulist
99 * was a bad idea, and is only provided for backwards
100 * compatibility for older targets.
101 */
102 return -ENODEV;
103 }
104
105 if (IS_ERR(ptr: fw)) {
106 DRM_DEV_ERROR(dev, "Unable to load %s\n", fwname);
107 return PTR_ERR(ptr: fw);
108 }
109
110 /* Figure out how much memory we need */
111 mem_size = qcom_mdt_get_size(fw);
112 if (mem_size < 0) {
113 ret = mem_size;
114 goto out;
115 }
116
117 if (mem_size > resource_size(res: &r)) {
118 DRM_DEV_ERROR(dev,
119 "memory region is too small to load the MDT\n");
120 ret = -E2BIG;
121 goto out;
122 }
123
124 /* Allocate memory for the firmware image */
125 mem_region = memremap(offset: mem_phys, size: mem_size, flags: MEMREMAP_WC);
126 if (!mem_region) {
127 ret = -ENOMEM;
128 goto out;
129 }
130
131 /*
132 * Load the rest of the MDT
133 *
134 * Note that we could be dealing with two different paths, since
135 * with upstream linux-firmware it would be in a qcom/ subdir..
136 * adreno_request_fw() handles this, but qcom_mdt_load() does
137 * not. But since we've already gotten through adreno_request_fw()
138 * we know which of the two cases it is:
139 */
140 if (signed_fwname || (to_adreno_gpu(gpu)->fwloc == FW_LOCATION_LEGACY)) {
141 ret = qcom_mdt_load(dev, fw, fw_name: fwname, pas_id: pasid,
142 mem_region, mem_phys, mem_size, NULL);
143 } else {
144 char *newname;
145
146 newname = kasprintf(GFP_KERNEL, fmt: "qcom/%s", fwname);
147
148 ret = qcom_mdt_load(dev, fw, fw_name: newname, pas_id: pasid,
149 mem_region, mem_phys, mem_size, NULL);
150 kfree(objp: newname);
151 }
152 if (ret)
153 goto out;
154
155 /* Send the image to the secure world */
156 ret = qcom_scm_pas_auth_and_reset(peripheral: pasid);
157
158 /*
159 * If the scm call returns -EOPNOTSUPP we assume that this target
160 * doesn't need/support the zap shader so quietly fail
161 */
162 if (ret == -EOPNOTSUPP)
163 zap_available = false;
164 else if (ret)
165 DRM_DEV_ERROR(dev, "Unable to authorize the image\n");
166
167out:
168 if (mem_region)
169 memunmap(addr: mem_region);
170
171 release_firmware(fw);
172
173 return ret;
174}
175
176int adreno_zap_shader_load(struct msm_gpu *gpu, u32 pasid)
177{
178 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
179 struct platform_device *pdev = gpu->pdev;
180
181 /* Short cut if we determine the zap shader isn't available/needed */
182 if (!zap_available)
183 return -ENODEV;
184
185 /* We need SCM to be able to load the firmware */
186 if (!qcom_scm_is_available()) {
187 DRM_DEV_ERROR(&pdev->dev, "SCM is not available\n");
188 return -EPROBE_DEFER;
189 }
190
191 return zap_shader_load_mdt(gpu, fwname: adreno_gpu->info->zapfw, pasid);
192}
193
194struct msm_gem_address_space *
195adreno_create_address_space(struct msm_gpu *gpu,
196 struct platform_device *pdev)
197{
198 return adreno_iommu_create_address_space(gpu, pdev, quirks: 0);
199}
200
201struct msm_gem_address_space *
202adreno_iommu_create_address_space(struct msm_gpu *gpu,
203 struct platform_device *pdev,
204 unsigned long quirks)
205{
206 struct iommu_domain_geometry *geometry;
207 struct msm_mmu *mmu;
208 struct msm_gem_address_space *aspace;
209 u64 start, size;
210
211 mmu = msm_iommu_gpu_new(&pdev->dev, gpu, quirks);
212 if (IS_ERR_OR_NULL(ptr: mmu))
213 return ERR_CAST(ptr: mmu);
214
215 geometry = msm_iommu_get_geometry(mmu);
216 if (IS_ERR(ptr: geometry))
217 return ERR_CAST(ptr: geometry);
218
219 /*
220 * Use the aperture start or SZ_16M, whichever is greater. This will
221 * ensure that we align with the allocated pagetable range while still
222 * allowing room in the lower 32 bits for GMEM and whatnot
223 */
224 start = max_t(u64, SZ_16M, geometry->aperture_start);
225 size = geometry->aperture_end - start + 1;
226
227 aspace = msm_gem_address_space_create(mmu, "gpu",
228 start & GENMASK_ULL(48, 0), size);
229
230 if (IS_ERR(ptr: aspace) && !IS_ERR(ptr: mmu))
231 mmu->funcs->destroy(mmu);
232
233 return aspace;
234}
235
236u64 adreno_private_address_space_size(struct msm_gpu *gpu)
237{
238 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
239
240 if (address_space_size)
241 return address_space_size;
242
243 if (adreno_gpu->info->address_space_size)
244 return adreno_gpu->info->address_space_size;
245
246 return SZ_4G;
247}
248
249#define ARM_SMMU_FSR_TF BIT(1)
250#define ARM_SMMU_FSR_PF BIT(3)
251#define ARM_SMMU_FSR_EF BIT(4)
252
253int adreno_fault_handler(struct msm_gpu *gpu, unsigned long iova, int flags,
254 struct adreno_smmu_fault_info *info, const char *block,
255 u32 scratch[4])
256{
257 const char *type = "UNKNOWN";
258 bool do_devcoredump = info && !READ_ONCE(gpu->crashstate);
259
260 /*
261 * If we aren't going to be resuming later from fault_worker, then do
262 * it now.
263 */
264 if (!do_devcoredump) {
265 gpu->aspace->mmu->funcs->resume_translation(gpu->aspace->mmu);
266 }
267
268 /*
269 * Print a default message if we couldn't get the data from the
270 * adreno-smmu-priv
271 */
272 if (!info) {
273 pr_warn_ratelimited("*** gpu fault: iova=%.16lx flags=%d (%u,%u,%u,%u)\n",
274 iova, flags,
275 scratch[0], scratch[1], scratch[2], scratch[3]);
276
277 return 0;
278 }
279
280 if (info->fsr & ARM_SMMU_FSR_TF)
281 type = "TRANSLATION";
282 else if (info->fsr & ARM_SMMU_FSR_PF)
283 type = "PERMISSION";
284 else if (info->fsr & ARM_SMMU_FSR_EF)
285 type = "EXTERNAL";
286
287 pr_warn_ratelimited("*** gpu fault: ttbr0=%.16llx iova=%.16lx dir=%s type=%s source=%s (%u,%u,%u,%u)\n",
288 info->ttbr0, iova,
289 flags & IOMMU_FAULT_WRITE ? "WRITE" : "READ",
290 type, block,
291 scratch[0], scratch[1], scratch[2], scratch[3]);
292
293 if (do_devcoredump) {
294 /* Turn off the hangcheck timer to keep it from bothering us */
295 del_timer(timer: &gpu->hangcheck_timer);
296
297 gpu->fault_info.ttbr0 = info->ttbr0;
298 gpu->fault_info.iova = iova;
299 gpu->fault_info.flags = flags;
300 gpu->fault_info.type = type;
301 gpu->fault_info.block = block;
302
303 kthread_queue_work(gpu->worker, &gpu->fault_work);
304 }
305
306 return 0;
307}
308
309int adreno_get_param(struct msm_gpu *gpu, struct msm_file_private *ctx,
310 uint32_t param, uint64_t *value, uint32_t *len)
311{
312 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
313
314 /* No pointer params yet */
315 if (*len != 0)
316 return -EINVAL;
317
318 switch (param) {
319 case MSM_PARAM_GPU_ID:
320 *value = adreno_gpu->info->revn;
321 return 0;
322 case MSM_PARAM_GMEM_SIZE:
323 *value = adreno_gpu->info->gmem;
324 return 0;
325 case MSM_PARAM_GMEM_BASE:
326 if (adreno_is_a650_family(gpu: adreno_gpu) ||
327 adreno_is_a740_family(gpu: adreno_gpu))
328 *value = 0;
329 else
330 *value = 0x100000;
331 return 0;
332 case MSM_PARAM_CHIP_ID:
333 *value = adreno_gpu->chip_id;
334 if (!adreno_gpu->info->revn)
335 *value |= ((uint64_t) adreno_gpu->speedbin) << 32;
336 return 0;
337 case MSM_PARAM_MAX_FREQ:
338 *value = adreno_gpu->base.fast_rate;
339 return 0;
340 case MSM_PARAM_TIMESTAMP:
341 if (adreno_gpu->funcs->get_timestamp) {
342 int ret;
343
344 pm_runtime_get_sync(&gpu->pdev->dev);
345 ret = adreno_gpu->funcs->get_timestamp(gpu, value);
346 pm_runtime_put_autosuspend(&gpu->pdev->dev);
347
348 return ret;
349 }
350 return -EINVAL;
351 case MSM_PARAM_PRIORITIES:
352 *value = gpu->nr_rings * NR_SCHED_PRIORITIES;
353 return 0;
354 case MSM_PARAM_PP_PGTABLE:
355 *value = 0;
356 return 0;
357 case MSM_PARAM_FAULTS:
358 if (ctx->aspace)
359 *value = gpu->global_faults + ctx->aspace->faults;
360 else
361 *value = gpu->global_faults;
362 return 0;
363 case MSM_PARAM_SUSPENDS:
364 *value = gpu->suspend_count;
365 return 0;
366 case MSM_PARAM_VA_START:
367 if (ctx->aspace == gpu->aspace)
368 return -EINVAL;
369 *value = ctx->aspace->va_start;
370 return 0;
371 case MSM_PARAM_VA_SIZE:
372 if (ctx->aspace == gpu->aspace)
373 return -EINVAL;
374 *value = ctx->aspace->va_size;
375 return 0;
376 default:
377 DBG("%s: invalid param: %u", gpu->name, param);
378 return -EINVAL;
379 }
380}
381
382int adreno_set_param(struct msm_gpu *gpu, struct msm_file_private *ctx,
383 uint32_t param, uint64_t value, uint32_t len)
384{
385 switch (param) {
386 case MSM_PARAM_COMM:
387 case MSM_PARAM_CMDLINE:
388 /* kstrdup_quotable_cmdline() limits to PAGE_SIZE, so
389 * that should be a reasonable upper bound
390 */
391 if (len > PAGE_SIZE)
392 return -EINVAL;
393 break;
394 default:
395 if (len != 0)
396 return -EINVAL;
397 }
398
399 switch (param) {
400 case MSM_PARAM_COMM:
401 case MSM_PARAM_CMDLINE: {
402 char *str, **paramp;
403
404 str = memdup_user_nul(u64_to_user_ptr(value), len);
405 if (IS_ERR(ptr: str))
406 return PTR_ERR(ptr: str);
407
408 mutex_lock(&gpu->lock);
409
410 if (param == MSM_PARAM_COMM) {
411 paramp = &ctx->comm;
412 } else {
413 paramp = &ctx->cmdline;
414 }
415
416 kfree(objp: *paramp);
417 *paramp = str;
418
419 mutex_unlock(lock: &gpu->lock);
420
421 return 0;
422 }
423 case MSM_PARAM_SYSPROF:
424 if (!capable(CAP_SYS_ADMIN))
425 return -EPERM;
426 return msm_file_private_set_sysprof(ctx, gpu, value);
427 default:
428 DBG("%s: invalid param: %u", gpu->name, param);
429 return -EINVAL;
430 }
431}
432
433const struct firmware *
434adreno_request_fw(struct adreno_gpu *adreno_gpu, const char *fwname)
435{
436 struct drm_device *drm = adreno_gpu->base.dev;
437 const struct firmware *fw = NULL;
438 char *newname;
439 int ret;
440
441 newname = kasprintf(GFP_KERNEL, fmt: "qcom/%s", fwname);
442 if (!newname)
443 return ERR_PTR(error: -ENOMEM);
444
445 /*
446 * Try first to load from qcom/$fwfile using a direct load (to avoid
447 * a potential timeout waiting for usermode helper)
448 */
449 if ((adreno_gpu->fwloc == FW_LOCATION_UNKNOWN) ||
450 (adreno_gpu->fwloc == FW_LOCATION_NEW)) {
451
452 ret = request_firmware_direct(fw: &fw, name: newname, device: drm->dev);
453 if (!ret) {
454 DRM_DEV_INFO(drm->dev, "loaded %s from new location\n",
455 newname);
456 adreno_gpu->fwloc = FW_LOCATION_NEW;
457 goto out;
458 } else if (adreno_gpu->fwloc != FW_LOCATION_UNKNOWN) {
459 DRM_DEV_ERROR(drm->dev, "failed to load %s: %d\n",
460 newname, ret);
461 fw = ERR_PTR(error: ret);
462 goto out;
463 }
464 }
465
466 /*
467 * Then try the legacy location without qcom/ prefix
468 */
469 if ((adreno_gpu->fwloc == FW_LOCATION_UNKNOWN) ||
470 (adreno_gpu->fwloc == FW_LOCATION_LEGACY)) {
471
472 ret = request_firmware_direct(fw: &fw, name: fwname, device: drm->dev);
473 if (!ret) {
474 DRM_DEV_INFO(drm->dev, "loaded %s from legacy location\n",
475 newname);
476 adreno_gpu->fwloc = FW_LOCATION_LEGACY;
477 goto out;
478 } else if (adreno_gpu->fwloc != FW_LOCATION_UNKNOWN) {
479 DRM_DEV_ERROR(drm->dev, "failed to load %s: %d\n",
480 fwname, ret);
481 fw = ERR_PTR(error: ret);
482 goto out;
483 }
484 }
485
486 /*
487 * Finally fall back to request_firmware() for cases where the
488 * usermode helper is needed (I think mainly android)
489 */
490 if ((adreno_gpu->fwloc == FW_LOCATION_UNKNOWN) ||
491 (adreno_gpu->fwloc == FW_LOCATION_HELPER)) {
492
493 ret = request_firmware(fw: &fw, name: newname, device: drm->dev);
494 if (!ret) {
495 DRM_DEV_INFO(drm->dev, "loaded %s with helper\n",
496 newname);
497 adreno_gpu->fwloc = FW_LOCATION_HELPER;
498 goto out;
499 } else if (adreno_gpu->fwloc != FW_LOCATION_UNKNOWN) {
500 DRM_DEV_ERROR(drm->dev, "failed to load %s: %d\n",
501 newname, ret);
502 fw = ERR_PTR(error: ret);
503 goto out;
504 }
505 }
506
507 DRM_DEV_ERROR(drm->dev, "failed to load %s\n", fwname);
508 fw = ERR_PTR(error: -ENOENT);
509out:
510 kfree(objp: newname);
511 return fw;
512}
513
514int adreno_load_fw(struct adreno_gpu *adreno_gpu)
515{
516 int i;
517
518 for (i = 0; i < ARRAY_SIZE(adreno_gpu->info->fw); i++) {
519 const struct firmware *fw;
520
521 if (!adreno_gpu->info->fw[i])
522 continue;
523
524 /* Skip loading GMU firwmare with GMU Wrapper */
525 if (adreno_has_gmu_wrapper(gpu: adreno_gpu) && i == ADRENO_FW_GMU)
526 continue;
527
528 /* Skip if the firmware has already been loaded */
529 if (adreno_gpu->fw[i])
530 continue;
531
532 fw = adreno_request_fw(adreno_gpu, fwname: adreno_gpu->info->fw[i]);
533 if (IS_ERR(ptr: fw))
534 return PTR_ERR(ptr: fw);
535
536 adreno_gpu->fw[i] = fw;
537 }
538
539 return 0;
540}
541
542struct drm_gem_object *adreno_fw_create_bo(struct msm_gpu *gpu,
543 const struct firmware *fw, u64 *iova)
544{
545 struct drm_gem_object *bo;
546 void *ptr;
547
548 ptr = msm_gem_kernel_new(gpu->dev, fw->size - 4,
549 MSM_BO_WC | MSM_BO_GPU_READONLY, gpu->aspace, &bo, iova);
550
551 if (IS_ERR(ptr))
552 return ERR_CAST(ptr);
553
554 memcpy(ptr, &fw->data[4], fw->size - 4);
555
556 msm_gem_put_vaddr(bo);
557
558 return bo;
559}
560
561int adreno_hw_init(struct msm_gpu *gpu)
562{
563 VERB("%s", gpu->name);
564
565 for (int i = 0; i < gpu->nr_rings; i++) {
566 struct msm_ringbuffer *ring = gpu->rb[i];
567
568 if (!ring)
569 continue;
570
571 ring->cur = ring->start;
572 ring->next = ring->start;
573 ring->memptrs->rptr = 0;
574 ring->memptrs->bv_fence = ring->fctx->completed_fence;
575
576 /* Detect and clean up an impossible fence, ie. if GPU managed
577 * to scribble something invalid, we don't want that to confuse
578 * us into mistakingly believing that submits have completed.
579 */
580 if (fence_before(ring->fctx->last_fence, ring->memptrs->fence)) {
581 ring->memptrs->fence = ring->fctx->last_fence;
582 }
583 }
584
585 return 0;
586}
587
588/* Use this helper to read rptr, since a430 doesn't update rptr in memory */
589static uint32_t get_rptr(struct adreno_gpu *adreno_gpu,
590 struct msm_ringbuffer *ring)
591{
592 struct msm_gpu *gpu = &adreno_gpu->base;
593
594 return gpu->funcs->get_rptr(gpu, ring);
595}
596
597struct msm_ringbuffer *adreno_active_ring(struct msm_gpu *gpu)
598{
599 return gpu->rb[0];
600}
601
602void adreno_recover(struct msm_gpu *gpu)
603{
604 struct drm_device *dev = gpu->dev;
605 int ret;
606
607 // XXX pm-runtime?? we *need* the device to be off after this
608 // so maybe continuing to call ->pm_suspend/resume() is better?
609
610 gpu->funcs->pm_suspend(gpu);
611 gpu->funcs->pm_resume(gpu);
612
613 ret = msm_gpu_hw_init(gpu);
614 if (ret) {
615 DRM_DEV_ERROR(dev->dev, "gpu hw init failed: %d\n", ret);
616 /* hmm, oh well? */
617 }
618}
619
620void adreno_flush(struct msm_gpu *gpu, struct msm_ringbuffer *ring, u32 reg)
621{
622 uint32_t wptr;
623
624 /* Copy the shadow to the actual register */
625 ring->cur = ring->next;
626
627 /*
628 * Mask wptr value that we calculate to fit in the HW range. This is
629 * to account for the possibility that the last command fit exactly into
630 * the ringbuffer and rb->next hasn't wrapped to zero yet
631 */
632 wptr = get_wptr(ring);
633
634 /* ensure writes to ringbuffer have hit system memory: */
635 mb();
636
637 gpu_write(gpu, reg, wptr);
638}
639
640bool adreno_idle(struct msm_gpu *gpu, struct msm_ringbuffer *ring)
641{
642 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
643 uint32_t wptr = get_wptr(ring);
644
645 /* wait for CP to drain ringbuffer: */
646 if (!spin_until(get_rptr(adreno_gpu, ring) == wptr))
647 return true;
648
649 /* TODO maybe we need to reset GPU here to recover from hang? */
650 DRM_ERROR("%s: timeout waiting to drain ringbuffer %d rptr/wptr = %X/%X\n",
651 gpu->name, ring->id, get_rptr(adreno_gpu, ring), wptr);
652
653 return false;
654}
655
656int adreno_gpu_state_get(struct msm_gpu *gpu, struct msm_gpu_state *state)
657{
658 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
659 int i, count = 0;
660
661 WARN_ON(!mutex_is_locked(&gpu->lock));
662
663 kref_init(kref: &state->ref);
664
665 ktime_get_real_ts64(tv: &state->time);
666
667 for (i = 0; i < gpu->nr_rings; i++) {
668 int size = 0, j;
669
670 state->ring[i].fence = gpu->rb[i]->memptrs->fence;
671 state->ring[i].iova = gpu->rb[i]->iova;
672 state->ring[i].seqno = gpu->rb[i]->fctx->last_fence;
673 state->ring[i].rptr = get_rptr(adreno_gpu, ring: gpu->rb[i]);
674 state->ring[i].wptr = get_wptr(ring: gpu->rb[i]);
675
676 /* Copy at least 'wptr' dwords of the data */
677 size = state->ring[i].wptr;
678
679 /* After wptr find the last non zero dword to save space */
680 for (j = state->ring[i].wptr; j < MSM_GPU_RINGBUFFER_SZ >> 2; j++)
681 if (gpu->rb[i]->start[j])
682 size = j + 1;
683
684 if (size) {
685 state->ring[i].data = kvmalloc(size: size << 2, GFP_KERNEL);
686 if (state->ring[i].data) {
687 memcpy(state->ring[i].data, gpu->rb[i]->start, size << 2);
688 state->ring[i].data_size = size << 2;
689 }
690 }
691 }
692
693 /* Some targets prefer to collect their own registers */
694 if (!adreno_gpu->registers)
695 return 0;
696
697 /* Count the number of registers */
698 for (i = 0; adreno_gpu->registers[i] != ~0; i += 2)
699 count += adreno_gpu->registers[i + 1] -
700 adreno_gpu->registers[i] + 1;
701
702 state->registers = kcalloc(n: count * 2, size: sizeof(u32), GFP_KERNEL);
703 if (state->registers) {
704 int pos = 0;
705
706 for (i = 0; adreno_gpu->registers[i] != ~0; i += 2) {
707 u32 start = adreno_gpu->registers[i];
708 u32 end = adreno_gpu->registers[i + 1];
709 u32 addr;
710
711 for (addr = start; addr <= end; addr++) {
712 state->registers[pos++] = addr;
713 state->registers[pos++] = gpu_read(gpu, addr);
714 }
715 }
716
717 state->nr_registers = count;
718 }
719
720 return 0;
721}
722
723void adreno_gpu_state_destroy(struct msm_gpu_state *state)
724{
725 int i;
726
727 for (i = 0; i < ARRAY_SIZE(state->ring); i++)
728 kvfree(addr: state->ring[i].data);
729
730 for (i = 0; state->bos && i < state->nr_bos; i++)
731 kvfree(addr: state->bos[i].data);
732
733 kfree(objp: state->bos);
734 kfree(objp: state->comm);
735 kfree(objp: state->cmd);
736 kfree(objp: state->registers);
737}
738
739static void adreno_gpu_state_kref_destroy(struct kref *kref)
740{
741 struct msm_gpu_state *state = container_of(kref,
742 struct msm_gpu_state, ref);
743
744 adreno_gpu_state_destroy(state);
745 kfree(objp: state);
746}
747
748int adreno_gpu_state_put(struct msm_gpu_state *state)
749{
750 if (IS_ERR_OR_NULL(ptr: state))
751 return 1;
752
753 return kref_put(kref: &state->ref, release: adreno_gpu_state_kref_destroy);
754}
755
756#if defined(CONFIG_DEBUG_FS) || defined(CONFIG_DEV_COREDUMP)
757
758static char *adreno_gpu_ascii85_encode(u32 *src, size_t len)
759{
760 void *buf;
761 size_t buf_itr = 0, buffer_size;
762 char out[ASCII85_BUFSZ];
763 long l;
764 int i;
765
766 if (!src || !len)
767 return NULL;
768
769 l = ascii85_encode_len(len);
770
771 /*
772 * Ascii85 outputs either a 5 byte string or a 1 byte string. So we
773 * account for the worst case of 5 bytes per dword plus the 1 for '\0'
774 */
775 buffer_size = (l * 5) + 1;
776
777 buf = kvmalloc(size: buffer_size, GFP_KERNEL);
778 if (!buf)
779 return NULL;
780
781 for (i = 0; i < l; i++)
782 buf_itr += scnprintf(buf: buf + buf_itr, size: buffer_size - buf_itr, fmt: "%s",
783 ascii85_encode(in: src[i], out));
784
785 return buf;
786}
787
788/* len is expected to be in bytes
789 *
790 * WARNING: *ptr should be allocated with kvmalloc or friends. It can be free'd
791 * with kvfree() and replaced with a newly kvmalloc'd buffer on the first call
792 * when the unencoded raw data is encoded
793 */
794void adreno_show_object(struct drm_printer *p, void **ptr, int len,
795 bool *encoded)
796{
797 if (!*ptr || !len)
798 return;
799
800 if (!*encoded) {
801 long datalen, i;
802 u32 *buf = *ptr;
803
804 /*
805 * Only dump the non-zero part of the buffer - rarely will
806 * any data completely fill the entire allocated size of
807 * the buffer.
808 */
809 for (datalen = 0, i = 0; i < len >> 2; i++)
810 if (buf[i])
811 datalen = ((i + 1) << 2);
812
813 /*
814 * If we reach here, then the originally captured binary buffer
815 * will be replaced with the ascii85 encoded string
816 */
817 *ptr = adreno_gpu_ascii85_encode(src: buf, len: datalen);
818
819 kvfree(addr: buf);
820
821 *encoded = true;
822 }
823
824 if (!*ptr)
825 return;
826
827 drm_puts(p, " data: !!ascii85 |\n");
828 drm_puts(p, " ");
829
830 drm_puts(p, *ptr);
831
832 drm_puts(p, "\n");
833}
834
835void adreno_show(struct msm_gpu *gpu, struct msm_gpu_state *state,
836 struct drm_printer *p)
837{
838 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
839 int i;
840
841 if (IS_ERR_OR_NULL(ptr: state))
842 return;
843
844 drm_printf(p, "revision: %u (%"ADRENO_CHIPID_FMT")\n",
845 adreno_gpu->info->revn,
846 ADRENO_CHIPID_ARGS(adreno_gpu->chip_id));
847 /*
848 * If this is state collected due to iova fault, so fault related info
849 *
850 * TTBR0 would not be zero, so this is a good way to distinguish
851 */
852 if (state->fault_info.ttbr0) {
853 const struct msm_gpu_fault_info *info = &state->fault_info;
854
855 drm_puts(p, "fault-info:\n");
856 drm_printf(p, " - ttbr0=%.16llx\n", info->ttbr0);
857 drm_printf(p, " - iova=%.16lx\n", info->iova);
858 drm_printf(p, " - dir=%s\n", info->flags & IOMMU_FAULT_WRITE ? "WRITE" : "READ");
859 drm_printf(p, " - type=%s\n", info->type);
860 drm_printf(p, " - source=%s\n", info->block);
861 }
862
863 drm_printf(p, "rbbm-status: 0x%08x\n", state->rbbm_status);
864
865 drm_puts(p, "ringbuffer:\n");
866
867 for (i = 0; i < gpu->nr_rings; i++) {
868 drm_printf(p, " - id: %d\n", i);
869 drm_printf(p, " iova: 0x%016llx\n", state->ring[i].iova);
870 drm_printf(p, " last-fence: %u\n", state->ring[i].seqno);
871 drm_printf(p, " retired-fence: %u\n", state->ring[i].fence);
872 drm_printf(p, " rptr: %u\n", state->ring[i].rptr);
873 drm_printf(p, " wptr: %u\n", state->ring[i].wptr);
874 drm_printf(p, " size: %u\n", MSM_GPU_RINGBUFFER_SZ);
875
876 adreno_show_object(p, ptr: &state->ring[i].data,
877 len: state->ring[i].data_size, encoded: &state->ring[i].encoded);
878 }
879
880 if (state->bos) {
881 drm_puts(p, "bos:\n");
882
883 for (i = 0; i < state->nr_bos; i++) {
884 drm_printf(p, " - iova: 0x%016llx\n",
885 state->bos[i].iova);
886 drm_printf(p, " size: %zd\n", state->bos[i].size);
887 drm_printf(p, " name: %-32s\n", state->bos[i].name);
888
889 adreno_show_object(p, ptr: &state->bos[i].data,
890 len: state->bos[i].size, encoded: &state->bos[i].encoded);
891 }
892 }
893
894 if (state->nr_registers) {
895 drm_puts(p, "registers:\n");
896
897 for (i = 0; i < state->nr_registers; i++) {
898 drm_printf(p, " - { offset: 0x%04x, value: 0x%08x }\n",
899 state->registers[i * 2] << 2,
900 state->registers[(i * 2) + 1]);
901 }
902 }
903}
904#endif
905
906/* Dump common gpu status and scratch registers on any hang, to make
907 * the hangcheck logs more useful. The scratch registers seem always
908 * safe to read when GPU has hung (unlike some other regs, depending
909 * on how the GPU hung), and they are useful to match up to cmdstream
910 * dumps when debugging hangs:
911 */
912void adreno_dump_info(struct msm_gpu *gpu)
913{
914 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
915 int i;
916
917 printk("revision: %u (%"ADRENO_CHIPID_FMT")\n",
918 adreno_gpu->info->revn,
919 ADRENO_CHIPID_ARGS(adreno_gpu->chip_id));
920
921 for (i = 0; i < gpu->nr_rings; i++) {
922 struct msm_ringbuffer *ring = gpu->rb[i];
923
924 printk("rb %d: fence: %d/%d\n", i,
925 ring->memptrs->fence,
926 ring->fctx->last_fence);
927
928 printk("rptr: %d\n", get_rptr(adreno_gpu, ring));
929 printk("rb wptr: %d\n", get_wptr(ring));
930 }
931}
932
933/* would be nice to not have to duplicate the _show() stuff with printk(): */
934void adreno_dump(struct msm_gpu *gpu)
935{
936 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
937 int i;
938
939 if (!adreno_gpu->registers)
940 return;
941
942 /* dump these out in a form that can be parsed by demsm: */
943 printk("IO:region %s 00000000 00020000\n", gpu->name);
944 for (i = 0; adreno_gpu->registers[i] != ~0; i += 2) {
945 uint32_t start = adreno_gpu->registers[i];
946 uint32_t end = adreno_gpu->registers[i+1];
947 uint32_t addr;
948
949 for (addr = start; addr <= end; addr++) {
950 uint32_t val = gpu_read(gpu, addr);
951 printk("IO:R %08x %08x\n", addr<<2, val);
952 }
953 }
954}
955
956static uint32_t ring_freewords(struct msm_ringbuffer *ring)
957{
958 struct adreno_gpu *adreno_gpu = to_adreno_gpu(ring->gpu);
959 uint32_t size = MSM_GPU_RINGBUFFER_SZ >> 2;
960 /* Use ring->next to calculate free size */
961 uint32_t wptr = ring->next - ring->start;
962 uint32_t rptr = get_rptr(adreno_gpu, ring);
963 return (rptr + (size - 1) - wptr) % size;
964}
965
966void adreno_wait_ring(struct msm_ringbuffer *ring, uint32_t ndwords)
967{
968 if (spin_until(ring_freewords(ring) >= ndwords))
969 DRM_DEV_ERROR(ring->gpu->dev->dev,
970 "timeout waiting for space in ringbuffer %d\n",
971 ring->id);
972}
973
974static int adreno_get_pwrlevels(struct device *dev,
975 struct msm_gpu *gpu)
976{
977 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
978 unsigned long freq = ULONG_MAX;
979 struct dev_pm_opp *opp;
980 int ret;
981
982 gpu->fast_rate = 0;
983
984 /* devm_pm_opp_of_add_table may error out but will still create an OPP table */
985 ret = devm_pm_opp_of_add_table(dev);
986 if (ret == -ENODEV) {
987 /* Special cases for ancient hw with ancient DT bindings */
988 if (adreno_is_a2xx(gpu: adreno_gpu)) {
989 dev_warn(dev, "Unable to find the OPP table. Falling back to 200 MHz.\n");
990 dev_pm_opp_add(dev, freq: 200000000, u_volt: 0);
991 } else if (adreno_is_a320(gpu: adreno_gpu)) {
992 dev_warn(dev, "Unable to find the OPP table. Falling back to 450 MHz.\n");
993 dev_pm_opp_add(dev, freq: 450000000, u_volt: 0);
994 } else {
995 DRM_DEV_ERROR(dev, "Unable to find the OPP table\n");
996 return -ENODEV;
997 }
998 } else if (ret) {
999 DRM_DEV_ERROR(dev, "Unable to set the OPP table\n");
1000 return ret;
1001 }
1002
1003 /* Find the fastest defined rate */
1004 opp = dev_pm_opp_find_freq_floor(dev, freq: &freq);
1005 if (IS_ERR(ptr: opp))
1006 return PTR_ERR(ptr: opp);
1007
1008 gpu->fast_rate = freq;
1009 dev_pm_opp_put(opp);
1010
1011 DBG("fast_rate=%u, slow_rate=27000000", gpu->fast_rate);
1012
1013 return 0;
1014}
1015
1016int adreno_gpu_ocmem_init(struct device *dev, struct adreno_gpu *adreno_gpu,
1017 struct adreno_ocmem *adreno_ocmem)
1018{
1019 struct ocmem_buf *ocmem_hdl;
1020 struct ocmem *ocmem;
1021
1022 ocmem = of_get_ocmem(dev);
1023 if (IS_ERR(ptr: ocmem)) {
1024 if (PTR_ERR(ptr: ocmem) == -ENODEV) {
1025 /*
1026 * Return success since either the ocmem property was
1027 * not specified in device tree, or ocmem support is
1028 * not compiled into the kernel.
1029 */
1030 return 0;
1031 }
1032
1033 return PTR_ERR(ptr: ocmem);
1034 }
1035
1036 ocmem_hdl = ocmem_allocate(ocmem, client: OCMEM_GRAPHICS, size: adreno_gpu->info->gmem);
1037 if (IS_ERR(ptr: ocmem_hdl))
1038 return PTR_ERR(ptr: ocmem_hdl);
1039
1040 adreno_ocmem->ocmem = ocmem;
1041 adreno_ocmem->base = ocmem_hdl->addr;
1042 adreno_ocmem->hdl = ocmem_hdl;
1043
1044 if (WARN_ON(ocmem_hdl->len != adreno_gpu->info->gmem))
1045 return -ENOMEM;
1046
1047 return 0;
1048}
1049
1050void adreno_gpu_ocmem_cleanup(struct adreno_ocmem *adreno_ocmem)
1051{
1052 if (adreno_ocmem && adreno_ocmem->base)
1053 ocmem_free(ocmem: adreno_ocmem->ocmem, client: OCMEM_GRAPHICS,
1054 buf: adreno_ocmem->hdl);
1055}
1056
1057int adreno_read_speedbin(struct device *dev, u32 *speedbin)
1058{
1059 return nvmem_cell_read_variable_le_u32(dev, cell_id: "speed_bin", val: speedbin);
1060}
1061
1062int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
1063 struct adreno_gpu *adreno_gpu,
1064 const struct adreno_gpu_funcs *funcs, int nr_rings)
1065{
1066 struct device *dev = &pdev->dev;
1067 struct adreno_platform_config *config = dev->platform_data;
1068 struct msm_gpu_config adreno_gpu_config = { 0 };
1069 struct msm_gpu *gpu = &adreno_gpu->base;
1070 const char *gpu_name;
1071 u32 speedbin;
1072 int ret;
1073
1074 adreno_gpu->funcs = funcs;
1075 adreno_gpu->info = config->info;
1076 adreno_gpu->chip_id = config->chip_id;
1077
1078 gpu->allow_relocs = config->info->family < ADRENO_6XX_GEN1;
1079
1080 /* Only handle the core clock when GMU is not in use (or is absent). */
1081 if (adreno_has_gmu_wrapper(gpu: adreno_gpu) ||
1082 adreno_gpu->info->family < ADRENO_6XX_GEN1) {
1083 /*
1084 * This can only be done before devm_pm_opp_of_add_table(), or
1085 * dev_pm_opp_set_config() will WARN_ON()
1086 */
1087 if (IS_ERR(ptr: devm_clk_get(dev, "core"))) {
1088 /*
1089 * If "core" is absent, go for the legacy clock name.
1090 * If we got this far in probing, it's a given one of
1091 * them exists.
1092 */
1093 devm_pm_opp_set_clkname(dev, name: "core_clk");
1094 } else
1095 devm_pm_opp_set_clkname(dev, name: "core");
1096 }
1097
1098 if (adreno_read_speedbin(dev, speedbin: &speedbin) || !speedbin)
1099 speedbin = 0xffff;
1100 adreno_gpu->speedbin = (uint16_t) (0xffff & speedbin);
1101
1102 gpu_name = devm_kasprintf(dev, GFP_KERNEL, fmt: "%"ADRENO_CHIPID_FMT,
1103 ADRENO_CHIPID_ARGS(config->chip_id));
1104 if (!gpu_name)
1105 return -ENOMEM;
1106
1107 adreno_gpu_config.ioname = "kgsl_3d0_reg_memory";
1108
1109 adreno_gpu_config.nr_rings = nr_rings;
1110
1111 ret = adreno_get_pwrlevels(dev, gpu);
1112 if (ret)
1113 return ret;
1114
1115 pm_runtime_set_autosuspend_delay(dev,
1116 adreno_gpu->info->inactive_period);
1117 pm_runtime_use_autosuspend(dev);
1118
1119 return msm_gpu_init(drm, pdev, &adreno_gpu->base, &funcs->base,
1120 gpu_name, &adreno_gpu_config);
1121}
1122
1123void adreno_gpu_cleanup(struct adreno_gpu *adreno_gpu)
1124{
1125 struct msm_gpu *gpu = &adreno_gpu->base;
1126 struct msm_drm_private *priv = gpu->dev ? gpu->dev->dev_private : NULL;
1127 unsigned int i;
1128
1129 for (i = 0; i < ARRAY_SIZE(adreno_gpu->info->fw); i++)
1130 release_firmware(fw: adreno_gpu->fw[i]);
1131
1132 if (priv && pm_runtime_enabled(&priv->gpu_pdev->dev))
1133 pm_runtime_disable(&priv->gpu_pdev->dev);
1134
1135 msm_gpu_cleanup(&adreno_gpu->base);
1136}
1137

source code of linux/drivers/gpu/drm/msm/adreno/adreno_gpu.c