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/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 "adreno_gpu.h"
18 #include "msm_gem.h"
19 #include "msm_mmu.h"
20
21 static bool zap_available = true;
22
zap_shader_load_mdt(struct msm_gpu * gpu,const char * fwname,u32 pasid)23 static int zap_shader_load_mdt(struct msm_gpu *gpu, const char *fwname,
24 u32 pasid)
25 {
26 struct device *dev = &gpu->pdev->dev;
27 const struct firmware *fw;
28 struct device_node *np, *mem_np;
29 struct resource r;
30 phys_addr_t mem_phys;
31 ssize_t mem_size;
32 void *mem_region = NULL;
33 int ret;
34
35 if (!IS_ENABLED(CONFIG_ARCH_QCOM)) {
36 zap_available = false;
37 return -EINVAL;
38 }
39
40 np = of_get_child_by_name(dev->of_node, "zap-shader");
41 if (!np) {
42 zap_available = false;
43 return -ENODEV;
44 }
45
46 mem_np = of_parse_phandle(np, "memory-region", 0);
47 of_node_put(np);
48 if (!mem_np) {
49 zap_available = false;
50 return -EINVAL;
51 }
52
53 ret = of_address_to_resource(mem_np, 0, &r);
54 of_node_put(mem_np);
55 if (ret)
56 return ret;
57
58 mem_phys = r.start;
59
60 /* Request the MDT file for the firmware */
61 fw = adreno_request_fw(to_adreno_gpu(gpu), fwname);
62 if (IS_ERR(fw)) {
63 DRM_DEV_ERROR(dev, "Unable to load %s\n", fwname);
64 return PTR_ERR(fw);
65 }
66
67 /* Figure out how much memory we need */
68 mem_size = qcom_mdt_get_size(fw);
69 if (mem_size < 0) {
70 ret = mem_size;
71 goto out;
72 }
73
74 if (mem_size > resource_size(&r)) {
75 DRM_DEV_ERROR(dev,
76 "memory region is too small to load the MDT\n");
77 ret = -E2BIG;
78 goto out;
79 }
80
81 /* Allocate memory for the firmware image */
82 mem_region = memremap(mem_phys, mem_size, MEMREMAP_WC);
83 if (!mem_region) {
84 ret = -ENOMEM;
85 goto out;
86 }
87
88 /*
89 * Load the rest of the MDT
90 *
91 * Note that we could be dealing with two different paths, since
92 * with upstream linux-firmware it would be in a qcom/ subdir..
93 * adreno_request_fw() handles this, but qcom_mdt_load() does
94 * not. But since we've already gotten through adreno_request_fw()
95 * we know which of the two cases it is:
96 */
97 if (to_adreno_gpu(gpu)->fwloc == FW_LOCATION_LEGACY) {
98 ret = qcom_mdt_load(dev, fw, fwname, pasid,
99 mem_region, mem_phys, mem_size, NULL);
100 } else {
101 char *newname;
102
103 newname = kasprintf(GFP_KERNEL, "qcom/%s", fwname);
104
105 ret = qcom_mdt_load(dev, fw, newname, pasid,
106 mem_region, mem_phys, mem_size, NULL);
107 kfree(newname);
108 }
109 if (ret)
110 goto out;
111
112 /* Send the image to the secure world */
113 ret = qcom_scm_pas_auth_and_reset(pasid);
114
115 /*
116 * If the scm call returns -EOPNOTSUPP we assume that this target
117 * doesn't need/support the zap shader so quietly fail
118 */
119 if (ret == -EOPNOTSUPP)
120 zap_available = false;
121 else if (ret)
122 DRM_DEV_ERROR(dev, "Unable to authorize the image\n");
123
124 out:
125 if (mem_region)
126 memunmap(mem_region);
127
128 release_firmware(fw);
129
130 return ret;
131 }
132
adreno_zap_shader_load(struct msm_gpu * gpu,u32 pasid)133 int adreno_zap_shader_load(struct msm_gpu *gpu, u32 pasid)
134 {
135 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
136 struct platform_device *pdev = gpu->pdev;
137
138 /* Short cut if we determine the zap shader isn't available/needed */
139 if (!zap_available)
140 return -ENODEV;
141
142 /* We need SCM to be able to load the firmware */
143 if (!qcom_scm_is_available()) {
144 DRM_DEV_ERROR(&pdev->dev, "SCM is not available\n");
145 return -EPROBE_DEFER;
146 }
147
148 /* Each GPU has a target specific zap shader firmware name to use */
149 if (!adreno_gpu->info->zapfw) {
150 zap_available = false;
151 DRM_DEV_ERROR(&pdev->dev,
152 "Zap shader firmware file not specified for this target\n");
153 return -ENODEV;
154 }
155
156 return zap_shader_load_mdt(gpu, adreno_gpu->info->zapfw, pasid);
157 }
158
adreno_get_param(struct msm_gpu * gpu,uint32_t param,uint64_t * value)159 int adreno_get_param(struct msm_gpu *gpu, uint32_t param, uint64_t *value)
160 {
161 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
162
163 switch (param) {
164 case MSM_PARAM_GPU_ID:
165 *value = adreno_gpu->info->revn;
166 return 0;
167 case MSM_PARAM_GMEM_SIZE:
168 *value = adreno_gpu->gmem;
169 return 0;
170 case MSM_PARAM_GMEM_BASE:
171 *value = 0x100000;
172 return 0;
173 case MSM_PARAM_CHIP_ID:
174 *value = adreno_gpu->rev.patchid |
175 (adreno_gpu->rev.minor << 8) |
176 (adreno_gpu->rev.major << 16) |
177 (adreno_gpu->rev.core << 24);
178 return 0;
179 case MSM_PARAM_MAX_FREQ:
180 *value = adreno_gpu->base.fast_rate;
181 return 0;
182 case MSM_PARAM_TIMESTAMP:
183 if (adreno_gpu->funcs->get_timestamp) {
184 int ret;
185
186 pm_runtime_get_sync(&gpu->pdev->dev);
187 ret = adreno_gpu->funcs->get_timestamp(gpu, value);
188 pm_runtime_put_autosuspend(&gpu->pdev->dev);
189
190 return ret;
191 }
192 return -EINVAL;
193 case MSM_PARAM_NR_RINGS:
194 *value = gpu->nr_rings;
195 return 0;
196 case MSM_PARAM_PP_PGTABLE:
197 *value = 0;
198 return 0;
199 case MSM_PARAM_FAULTS:
200 *value = gpu->global_faults;
201 return 0;
202 default:
203 DBG("%s: invalid param: %u", gpu->name, param);
204 return -EINVAL;
205 }
206 }
207
208 const struct firmware *
adreno_request_fw(struct adreno_gpu * adreno_gpu,const char * fwname)209 adreno_request_fw(struct adreno_gpu *adreno_gpu, const char *fwname)
210 {
211 struct drm_device *drm = adreno_gpu->base.dev;
212 const struct firmware *fw = NULL;
213 char *newname;
214 int ret;
215
216 newname = kasprintf(GFP_KERNEL, "qcom/%s", fwname);
217 if (!newname)
218 return ERR_PTR(-ENOMEM);
219
220 /*
221 * Try first to load from qcom/$fwfile using a direct load (to avoid
222 * a potential timeout waiting for usermode helper)
223 */
224 if ((adreno_gpu->fwloc == FW_LOCATION_UNKNOWN) ||
225 (adreno_gpu->fwloc == FW_LOCATION_NEW)) {
226
227 ret = request_firmware_direct(&fw, newname, drm->dev);
228 if (!ret) {
229 DRM_DEV_INFO(drm->dev, "loaded %s from new location\n",
230 newname);
231 adreno_gpu->fwloc = FW_LOCATION_NEW;
232 goto out;
233 } else if (adreno_gpu->fwloc != FW_LOCATION_UNKNOWN) {
234 DRM_DEV_ERROR(drm->dev, "failed to load %s: %d\n",
235 newname, ret);
236 fw = ERR_PTR(ret);
237 goto out;
238 }
239 }
240
241 /*
242 * Then try the legacy location without qcom/ prefix
243 */
244 if ((adreno_gpu->fwloc == FW_LOCATION_UNKNOWN) ||
245 (adreno_gpu->fwloc == FW_LOCATION_LEGACY)) {
246
247 ret = request_firmware_direct(&fw, fwname, drm->dev);
248 if (!ret) {
249 DRM_DEV_INFO(drm->dev, "loaded %s from legacy location\n",
250 newname);
251 adreno_gpu->fwloc = FW_LOCATION_LEGACY;
252 goto out;
253 } else if (adreno_gpu->fwloc != FW_LOCATION_UNKNOWN) {
254 DRM_DEV_ERROR(drm->dev, "failed to load %s: %d\n",
255 fwname, ret);
256 fw = ERR_PTR(ret);
257 goto out;
258 }
259 }
260
261 /*
262 * Finally fall back to request_firmware() for cases where the
263 * usermode helper is needed (I think mainly android)
264 */
265 if ((adreno_gpu->fwloc == FW_LOCATION_UNKNOWN) ||
266 (adreno_gpu->fwloc == FW_LOCATION_HELPER)) {
267
268 ret = request_firmware(&fw, newname, drm->dev);
269 if (!ret) {
270 DRM_DEV_INFO(drm->dev, "loaded %s with helper\n",
271 newname);
272 adreno_gpu->fwloc = FW_LOCATION_HELPER;
273 goto out;
274 } else if (adreno_gpu->fwloc != FW_LOCATION_UNKNOWN) {
275 DRM_DEV_ERROR(drm->dev, "failed to load %s: %d\n",
276 newname, ret);
277 fw = ERR_PTR(ret);
278 goto out;
279 }
280 }
281
282 DRM_DEV_ERROR(drm->dev, "failed to load %s\n", fwname);
283 fw = ERR_PTR(-ENOENT);
284 out:
285 kfree(newname);
286 return fw;
287 }
288
adreno_load_fw(struct adreno_gpu * adreno_gpu)289 int adreno_load_fw(struct adreno_gpu *adreno_gpu)
290 {
291 int i;
292
293 for (i = 0; i < ARRAY_SIZE(adreno_gpu->info->fw); i++) {
294 const struct firmware *fw;
295
296 if (!adreno_gpu->info->fw[i])
297 continue;
298
299 /* Skip if the firmware has already been loaded */
300 if (adreno_gpu->fw[i])
301 continue;
302
303 fw = adreno_request_fw(adreno_gpu, adreno_gpu->info->fw[i]);
304 if (IS_ERR(fw))
305 return PTR_ERR(fw);
306
307 adreno_gpu->fw[i] = fw;
308 }
309
310 return 0;
311 }
312
adreno_fw_create_bo(struct msm_gpu * gpu,const struct firmware * fw,u64 * iova)313 struct drm_gem_object *adreno_fw_create_bo(struct msm_gpu *gpu,
314 const struct firmware *fw, u64 *iova)
315 {
316 struct drm_gem_object *bo;
317 void *ptr;
318
319 ptr = msm_gem_kernel_new_locked(gpu->dev, fw->size - 4,
320 MSM_BO_UNCACHED | MSM_BO_GPU_READONLY, gpu->aspace, &bo, iova);
321
322 if (IS_ERR(ptr))
323 return ERR_CAST(ptr);
324
325 memcpy(ptr, &fw->data[4], fw->size - 4);
326
327 msm_gem_put_vaddr(bo);
328
329 return bo;
330 }
331
adreno_hw_init(struct msm_gpu * gpu)332 int adreno_hw_init(struct msm_gpu *gpu)
333 {
334 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
335 int ret, i;
336
337 DBG("%s", gpu->name);
338
339 ret = adreno_load_fw(adreno_gpu);
340 if (ret)
341 return ret;
342
343 for (i = 0; i < gpu->nr_rings; i++) {
344 struct msm_ringbuffer *ring = gpu->rb[i];
345
346 if (!ring)
347 continue;
348
349 ring->cur = ring->start;
350 ring->next = ring->start;
351
352 /* reset completed fence seqno: */
353 ring->memptrs->fence = ring->seqno;
354 ring->memptrs->rptr = 0;
355 }
356
357 /*
358 * Setup REG_CP_RB_CNTL. The same value is used across targets (with
359 * the excpetion of A430 that disables the RPTR shadow) - the cacluation
360 * for the ringbuffer size and block size is moved to msm_gpu.h for the
361 * pre-processor to deal with and the A430 variant is ORed in here
362 */
363 adreno_gpu_write(adreno_gpu, REG_ADRENO_CP_RB_CNTL,
364 MSM_GPU_RB_CNTL_DEFAULT |
365 (adreno_is_a430(adreno_gpu) ? AXXX_CP_RB_CNTL_NO_UPDATE : 0));
366
367 /* Setup ringbuffer address - use ringbuffer[0] for GPU init */
368 adreno_gpu_write64(adreno_gpu, REG_ADRENO_CP_RB_BASE,
369 REG_ADRENO_CP_RB_BASE_HI, gpu->rb[0]->iova);
370
371 if (!adreno_is_a430(adreno_gpu)) {
372 adreno_gpu_write64(adreno_gpu, REG_ADRENO_CP_RB_RPTR_ADDR,
373 REG_ADRENO_CP_RB_RPTR_ADDR_HI,
374 rbmemptr(gpu->rb[0], rptr));
375 }
376
377 return 0;
378 }
379
380 /* Use this helper to read rptr, since a430 doesn't update rptr in memory */
get_rptr(struct adreno_gpu * adreno_gpu,struct msm_ringbuffer * ring)381 static uint32_t get_rptr(struct adreno_gpu *adreno_gpu,
382 struct msm_ringbuffer *ring)
383 {
384 if (adreno_is_a430(adreno_gpu))
385 return ring->memptrs->rptr = adreno_gpu_read(
386 adreno_gpu, REG_ADRENO_CP_RB_RPTR);
387 else
388 return ring->memptrs->rptr;
389 }
390
adreno_active_ring(struct msm_gpu * gpu)391 struct msm_ringbuffer *adreno_active_ring(struct msm_gpu *gpu)
392 {
393 return gpu->rb[0];
394 }
395
adreno_recover(struct msm_gpu * gpu)396 void adreno_recover(struct msm_gpu *gpu)
397 {
398 struct drm_device *dev = gpu->dev;
399 int ret;
400
401 // XXX pm-runtime?? we *need* the device to be off after this
402 // so maybe continuing to call ->pm_suspend/resume() is better?
403
404 gpu->funcs->pm_suspend(gpu);
405 gpu->funcs->pm_resume(gpu);
406
407 ret = msm_gpu_hw_init(gpu);
408 if (ret) {
409 DRM_DEV_ERROR(dev->dev, "gpu hw init failed: %d\n", ret);
410 /* hmm, oh well? */
411 }
412 }
413
adreno_submit(struct msm_gpu * gpu,struct msm_gem_submit * submit,struct msm_file_private * ctx)414 void adreno_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
415 struct msm_file_private *ctx)
416 {
417 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
418 struct msm_drm_private *priv = gpu->dev->dev_private;
419 struct msm_ringbuffer *ring = submit->ring;
420 unsigned i;
421
422 for (i = 0; i < submit->nr_cmds; i++) {
423 switch (submit->cmd[i].type) {
424 case MSM_SUBMIT_CMD_IB_TARGET_BUF:
425 /* ignore IB-targets */
426 break;
427 case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
428 /* ignore if there has not been a ctx switch: */
429 if (priv->lastctx == ctx)
430 break;
431 /* fall-thru */
432 case MSM_SUBMIT_CMD_BUF:
433 OUT_PKT3(ring, adreno_is_a430(adreno_gpu) ?
434 CP_INDIRECT_BUFFER_PFE : CP_INDIRECT_BUFFER_PFD, 2);
435 OUT_RING(ring, lower_32_bits(submit->cmd[i].iova));
436 OUT_RING(ring, submit->cmd[i].size);
437 OUT_PKT2(ring);
438 break;
439 }
440 }
441
442 OUT_PKT0(ring, REG_AXXX_CP_SCRATCH_REG2, 1);
443 OUT_RING(ring, submit->seqno);
444
445 if (adreno_is_a3xx(adreno_gpu) || adreno_is_a4xx(adreno_gpu)) {
446 /* Flush HLSQ lazy updates to make sure there is nothing
447 * pending for indirect loads after the timestamp has
448 * passed:
449 */
450 OUT_PKT3(ring, CP_EVENT_WRITE, 1);
451 OUT_RING(ring, HLSQ_FLUSH);
452 }
453
454 /* wait for idle before cache flush/interrupt */
455 OUT_PKT3(ring, CP_WAIT_FOR_IDLE, 1);
456 OUT_RING(ring, 0x00000000);
457
458 if (!adreno_is_a2xx(adreno_gpu)) {
459 /* BIT(31) of CACHE_FLUSH_TS triggers CACHE_FLUSH_TS IRQ from GPU */
460 OUT_PKT3(ring, CP_EVENT_WRITE, 3);
461 OUT_RING(ring, CACHE_FLUSH_TS | BIT(31));
462 OUT_RING(ring, rbmemptr(ring, fence));
463 OUT_RING(ring, submit->seqno);
464 } else {
465 /* BIT(31) means something else on a2xx */
466 OUT_PKT3(ring, CP_EVENT_WRITE, 3);
467 OUT_RING(ring, CACHE_FLUSH_TS);
468 OUT_RING(ring, rbmemptr(ring, fence));
469 OUT_RING(ring, submit->seqno);
470 OUT_PKT3(ring, CP_INTERRUPT, 1);
471 OUT_RING(ring, 0x80000000);
472 }
473
474 #if 0
475 if (adreno_is_a3xx(adreno_gpu)) {
476 /* Dummy set-constant to trigger context rollover */
477 OUT_PKT3(ring, CP_SET_CONSTANT, 2);
478 OUT_RING(ring, CP_REG(REG_A3XX_HLSQ_CL_KERNEL_GROUP_X_REG));
479 OUT_RING(ring, 0x00000000);
480 }
481 #endif
482
483 gpu->funcs->flush(gpu, ring);
484 }
485
adreno_flush(struct msm_gpu * gpu,struct msm_ringbuffer * ring)486 void adreno_flush(struct msm_gpu *gpu, struct msm_ringbuffer *ring)
487 {
488 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
489 uint32_t wptr;
490
491 /* Copy the shadow to the actual register */
492 ring->cur = ring->next;
493
494 /*
495 * Mask wptr value that we calculate to fit in the HW range. This is
496 * to account for the possibility that the last command fit exactly into
497 * the ringbuffer and rb->next hasn't wrapped to zero yet
498 */
499 wptr = get_wptr(ring);
500
501 /* ensure writes to ringbuffer have hit system memory: */
502 mb();
503
504 adreno_gpu_write(adreno_gpu, REG_ADRENO_CP_RB_WPTR, wptr);
505 }
506
adreno_idle(struct msm_gpu * gpu,struct msm_ringbuffer * ring)507 bool adreno_idle(struct msm_gpu *gpu, struct msm_ringbuffer *ring)
508 {
509 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
510 uint32_t wptr = get_wptr(ring);
511
512 /* wait for CP to drain ringbuffer: */
513 if (!spin_until(get_rptr(adreno_gpu, ring) == wptr))
514 return true;
515
516 /* TODO maybe we need to reset GPU here to recover from hang? */
517 DRM_ERROR("%s: timeout waiting to drain ringbuffer %d rptr/wptr = %X/%X\n",
518 gpu->name, ring->id, get_rptr(adreno_gpu, ring), wptr);
519
520 return false;
521 }
522
adreno_gpu_state_get(struct msm_gpu * gpu,struct msm_gpu_state * state)523 int adreno_gpu_state_get(struct msm_gpu *gpu, struct msm_gpu_state *state)
524 {
525 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
526 int i, count = 0;
527
528 kref_init(&state->ref);
529
530 ktime_get_real_ts64(&state->time);
531
532 for (i = 0; i < gpu->nr_rings; i++) {
533 int size = 0, j;
534
535 state->ring[i].fence = gpu->rb[i]->memptrs->fence;
536 state->ring[i].iova = gpu->rb[i]->iova;
537 state->ring[i].seqno = gpu->rb[i]->seqno;
538 state->ring[i].rptr = get_rptr(adreno_gpu, gpu->rb[i]);
539 state->ring[i].wptr = get_wptr(gpu->rb[i]);
540
541 /* Copy at least 'wptr' dwords of the data */
542 size = state->ring[i].wptr;
543
544 /* After wptr find the last non zero dword to save space */
545 for (j = state->ring[i].wptr; j < MSM_GPU_RINGBUFFER_SZ >> 2; j++)
546 if (gpu->rb[i]->start[j])
547 size = j + 1;
548
549 if (size) {
550 state->ring[i].data = kvmalloc(size << 2, GFP_KERNEL);
551 if (state->ring[i].data) {
552 memcpy(state->ring[i].data, gpu->rb[i]->start, size << 2);
553 state->ring[i].data_size = size << 2;
554 }
555 }
556 }
557
558 /* Some targets prefer to collect their own registers */
559 if (!adreno_gpu->registers)
560 return 0;
561
562 /* Count the number of registers */
563 for (i = 0; adreno_gpu->registers[i] != ~0; i += 2)
564 count += adreno_gpu->registers[i + 1] -
565 adreno_gpu->registers[i] + 1;
566
567 state->registers = kcalloc(count * 2, sizeof(u32), GFP_KERNEL);
568 if (state->registers) {
569 int pos = 0;
570
571 for (i = 0; adreno_gpu->registers[i] != ~0; i += 2) {
572 u32 start = adreno_gpu->registers[i];
573 u32 end = adreno_gpu->registers[i + 1];
574 u32 addr;
575
576 for (addr = start; addr <= end; addr++) {
577 state->registers[pos++] = addr;
578 state->registers[pos++] = gpu_read(gpu, addr);
579 }
580 }
581
582 state->nr_registers = count;
583 }
584
585 return 0;
586 }
587
adreno_gpu_state_destroy(struct msm_gpu_state * state)588 void adreno_gpu_state_destroy(struct msm_gpu_state *state)
589 {
590 int i;
591
592 for (i = 0; i < ARRAY_SIZE(state->ring); i++)
593 kvfree(state->ring[i].data);
594
595 for (i = 0; state->bos && i < state->nr_bos; i++)
596 kvfree(state->bos[i].data);
597
598 kfree(state->bos);
599 kfree(state->comm);
600 kfree(state->cmd);
601 kfree(state->registers);
602 }
603
adreno_gpu_state_kref_destroy(struct kref * kref)604 static void adreno_gpu_state_kref_destroy(struct kref *kref)
605 {
606 struct msm_gpu_state *state = container_of(kref,
607 struct msm_gpu_state, ref);
608
609 adreno_gpu_state_destroy(state);
610 kfree(state);
611 }
612
adreno_gpu_state_put(struct msm_gpu_state * state)613 int adreno_gpu_state_put(struct msm_gpu_state *state)
614 {
615 if (IS_ERR_OR_NULL(state))
616 return 1;
617
618 return kref_put(&state->ref, adreno_gpu_state_kref_destroy);
619 }
620
621 #if defined(CONFIG_DEBUG_FS) || defined(CONFIG_DEV_COREDUMP)
622
adreno_gpu_ascii85_encode(u32 * src,size_t len)623 static char *adreno_gpu_ascii85_encode(u32 *src, size_t len)
624 {
625 void *buf;
626 size_t buf_itr = 0, buffer_size;
627 char out[ASCII85_BUFSZ];
628 long l;
629 int i;
630
631 if (!src || !len)
632 return NULL;
633
634 l = ascii85_encode_len(len);
635
636 /*
637 * Ascii85 outputs either a 5 byte string or a 1 byte string. So we
638 * account for the worst case of 5 bytes per dword plus the 1 for '\0'
639 */
640 buffer_size = (l * 5) + 1;
641
642 buf = kvmalloc(buffer_size, GFP_KERNEL);
643 if (!buf)
644 return NULL;
645
646 for (i = 0; i < l; i++)
647 buf_itr += snprintf(buf + buf_itr, buffer_size - buf_itr, "%s",
648 ascii85_encode(src[i], out));
649
650 return buf;
651 }
652
653 /* len is expected to be in bytes */
adreno_show_object(struct drm_printer * p,void ** ptr,int len,bool * encoded)654 static void adreno_show_object(struct drm_printer *p, void **ptr, int len,
655 bool *encoded)
656 {
657 if (!*ptr || !len)
658 return;
659
660 if (!*encoded) {
661 long datalen, i;
662 u32 *buf = *ptr;
663
664 /*
665 * Only dump the non-zero part of the buffer - rarely will
666 * any data completely fill the entire allocated size of
667 * the buffer.
668 */
669 for (datalen = 0, i = 0; i < len >> 2; i++)
670 if (buf[i])
671 datalen = ((i + 1) << 2);
672
673 /*
674 * If we reach here, then the originally captured binary buffer
675 * will be replaced with the ascii85 encoded string
676 */
677 *ptr = adreno_gpu_ascii85_encode(buf, datalen);
678
679 kvfree(buf);
680
681 *encoded = true;
682 }
683
684 if (!*ptr)
685 return;
686
687 drm_puts(p, " data: !!ascii85 |\n");
688 drm_puts(p, " ");
689
690 drm_puts(p, *ptr);
691
692 drm_puts(p, "\n");
693 }
694
adreno_show(struct msm_gpu * gpu,struct msm_gpu_state * state,struct drm_printer * p)695 void adreno_show(struct msm_gpu *gpu, struct msm_gpu_state *state,
696 struct drm_printer *p)
697 {
698 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
699 int i;
700
701 if (IS_ERR_OR_NULL(state))
702 return;
703
704 drm_printf(p, "revision: %d (%d.%d.%d.%d)\n",
705 adreno_gpu->info->revn, adreno_gpu->rev.core,
706 adreno_gpu->rev.major, adreno_gpu->rev.minor,
707 adreno_gpu->rev.patchid);
708
709 drm_printf(p, "rbbm-status: 0x%08x\n", state->rbbm_status);
710
711 drm_puts(p, "ringbuffer:\n");
712
713 for (i = 0; i < gpu->nr_rings; i++) {
714 drm_printf(p, " - id: %d\n", i);
715 drm_printf(p, " iova: 0x%016llx\n", state->ring[i].iova);
716 drm_printf(p, " last-fence: %d\n", state->ring[i].seqno);
717 drm_printf(p, " retired-fence: %d\n", state->ring[i].fence);
718 drm_printf(p, " rptr: %d\n", state->ring[i].rptr);
719 drm_printf(p, " wptr: %d\n", state->ring[i].wptr);
720 drm_printf(p, " size: %d\n", MSM_GPU_RINGBUFFER_SZ);
721
722 adreno_show_object(p, &state->ring[i].data,
723 state->ring[i].data_size, &state->ring[i].encoded);
724 }
725
726 if (state->bos) {
727 drm_puts(p, "bos:\n");
728
729 for (i = 0; i < state->nr_bos; i++) {
730 drm_printf(p, " - iova: 0x%016llx\n",
731 state->bos[i].iova);
732 drm_printf(p, " size: %zd\n", state->bos[i].size);
733
734 adreno_show_object(p, &state->bos[i].data,
735 state->bos[i].size, &state->bos[i].encoded);
736 }
737 }
738
739 if (state->nr_registers) {
740 drm_puts(p, "registers:\n");
741
742 for (i = 0; i < state->nr_registers; i++) {
743 drm_printf(p, " - { offset: 0x%04x, value: 0x%08x }\n",
744 state->registers[i * 2] << 2,
745 state->registers[(i * 2) + 1]);
746 }
747 }
748 }
749 #endif
750
751 /* Dump common gpu status and scratch registers on any hang, to make
752 * the hangcheck logs more useful. The scratch registers seem always
753 * safe to read when GPU has hung (unlike some other regs, depending
754 * on how the GPU hung), and they are useful to match up to cmdstream
755 * dumps when debugging hangs:
756 */
adreno_dump_info(struct msm_gpu * gpu)757 void adreno_dump_info(struct msm_gpu *gpu)
758 {
759 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
760 int i;
761
762 printk("revision: %d (%d.%d.%d.%d)\n",
763 adreno_gpu->info->revn, adreno_gpu->rev.core,
764 adreno_gpu->rev.major, adreno_gpu->rev.minor,
765 adreno_gpu->rev.patchid);
766
767 for (i = 0; i < gpu->nr_rings; i++) {
768 struct msm_ringbuffer *ring = gpu->rb[i];
769
770 printk("rb %d: fence: %d/%d\n", i,
771 ring->memptrs->fence,
772 ring->seqno);
773
774 printk("rptr: %d\n", get_rptr(adreno_gpu, ring));
775 printk("rb wptr: %d\n", get_wptr(ring));
776 }
777 }
778
779 /* would be nice to not have to duplicate the _show() stuff with printk(): */
adreno_dump(struct msm_gpu * gpu)780 void adreno_dump(struct msm_gpu *gpu)
781 {
782 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
783 int i;
784
785 if (!adreno_gpu->registers)
786 return;
787
788 /* dump these out in a form that can be parsed by demsm: */
789 printk("IO:region %s 00000000 00020000\n", gpu->name);
790 for (i = 0; adreno_gpu->registers[i] != ~0; i += 2) {
791 uint32_t start = adreno_gpu->registers[i];
792 uint32_t end = adreno_gpu->registers[i+1];
793 uint32_t addr;
794
795 for (addr = start; addr <= end; addr++) {
796 uint32_t val = gpu_read(gpu, addr);
797 printk("IO:R %08x %08x\n", addr<<2, val);
798 }
799 }
800 }
801
ring_freewords(struct msm_ringbuffer * ring)802 static uint32_t ring_freewords(struct msm_ringbuffer *ring)
803 {
804 struct adreno_gpu *adreno_gpu = to_adreno_gpu(ring->gpu);
805 uint32_t size = MSM_GPU_RINGBUFFER_SZ >> 2;
806 /* Use ring->next to calculate free size */
807 uint32_t wptr = ring->next - ring->start;
808 uint32_t rptr = get_rptr(adreno_gpu, ring);
809 return (rptr + (size - 1) - wptr) % size;
810 }
811
adreno_wait_ring(struct msm_ringbuffer * ring,uint32_t ndwords)812 void adreno_wait_ring(struct msm_ringbuffer *ring, uint32_t ndwords)
813 {
814 if (spin_until(ring_freewords(ring) >= ndwords))
815 DRM_DEV_ERROR(ring->gpu->dev->dev,
816 "timeout waiting for space in ringbuffer %d\n",
817 ring->id);
818 }
819
820 /* Get legacy powerlevels from qcom,gpu-pwrlevels and populate the opp table */
adreno_get_legacy_pwrlevels(struct device * dev)821 static int adreno_get_legacy_pwrlevels(struct device *dev)
822 {
823 struct device_node *child, *node;
824 int ret;
825
826 node = of_get_compatible_child(dev->of_node, "qcom,gpu-pwrlevels");
827 if (!node) {
828 DRM_DEV_ERROR(dev, "Could not find the GPU powerlevels\n");
829 return -ENXIO;
830 }
831
832 for_each_child_of_node(node, child) {
833 unsigned int val;
834
835 ret = of_property_read_u32(child, "qcom,gpu-freq", &val);
836 if (ret)
837 continue;
838
839 /*
840 * Skip the intentionally bogus clock value found at the bottom
841 * of most legacy frequency tables
842 */
843 if (val != 27000000)
844 dev_pm_opp_add(dev, val, 0);
845 }
846
847 of_node_put(node);
848
849 return 0;
850 }
851
adreno_get_pwrlevels(struct device * dev,struct msm_gpu * gpu)852 static int adreno_get_pwrlevels(struct device *dev,
853 struct msm_gpu *gpu)
854 {
855 unsigned long freq = ULONG_MAX;
856 struct dev_pm_opp *opp;
857 int ret;
858
859 gpu->fast_rate = 0;
860
861 /* You down with OPP? */
862 if (!of_find_property(dev->of_node, "operating-points-v2", NULL))
863 ret = adreno_get_legacy_pwrlevels(dev);
864 else {
865 ret = dev_pm_opp_of_add_table(dev);
866 if (ret)
867 DRM_DEV_ERROR(dev, "Unable to set the OPP table\n");
868 }
869
870 if (!ret) {
871 /* Find the fastest defined rate */
872 opp = dev_pm_opp_find_freq_floor(dev, &freq);
873 if (!IS_ERR(opp)) {
874 gpu->fast_rate = freq;
875 dev_pm_opp_put(opp);
876 }
877 }
878
879 if (!gpu->fast_rate) {
880 dev_warn(dev,
881 "Could not find a clock rate. Using a reasonable default\n");
882 /* Pick a suitably safe clock speed for any target */
883 gpu->fast_rate = 200000000;
884 }
885
886 DBG("fast_rate=%u, slow_rate=27000000", gpu->fast_rate);
887
888 /* Check for an interconnect path for the bus */
889 gpu->icc_path = of_icc_get(dev, NULL);
890 if (IS_ERR(gpu->icc_path))
891 gpu->icc_path = NULL;
892
893 return 0;
894 }
895
adreno_gpu_init(struct drm_device * drm,struct platform_device * pdev,struct adreno_gpu * adreno_gpu,const struct adreno_gpu_funcs * funcs,int nr_rings)896 int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
897 struct adreno_gpu *adreno_gpu,
898 const struct adreno_gpu_funcs *funcs, int nr_rings)
899 {
900 struct adreno_platform_config *config = pdev->dev.platform_data;
901 struct msm_gpu_config adreno_gpu_config = { 0 };
902 struct msm_gpu *gpu = &adreno_gpu->base;
903
904 adreno_gpu->funcs = funcs;
905 adreno_gpu->info = adreno_info(config->rev);
906 adreno_gpu->gmem = adreno_gpu->info->gmem;
907 adreno_gpu->revn = adreno_gpu->info->revn;
908 adreno_gpu->rev = config->rev;
909
910 adreno_gpu_config.ioname = "kgsl_3d0_reg_memory";
911
912 adreno_gpu_config.va_start = SZ_16M;
913 adreno_gpu_config.va_end = 0xffffffff;
914 /* maximum range of a2xx mmu */
915 if (adreno_is_a2xx(adreno_gpu))
916 adreno_gpu_config.va_end = SZ_16M + 0xfff * SZ_64K;
917
918 adreno_gpu_config.nr_rings = nr_rings;
919
920 adreno_get_pwrlevels(&pdev->dev, gpu);
921
922 pm_runtime_set_autosuspend_delay(&pdev->dev,
923 adreno_gpu->info->inactive_period);
924 pm_runtime_use_autosuspend(&pdev->dev);
925 pm_runtime_enable(&pdev->dev);
926
927 return msm_gpu_init(drm, pdev, &adreno_gpu->base, &funcs->base,
928 adreno_gpu->info->name, &adreno_gpu_config);
929 }
930
adreno_gpu_cleanup(struct adreno_gpu * adreno_gpu)931 void adreno_gpu_cleanup(struct adreno_gpu *adreno_gpu)
932 {
933 struct msm_gpu *gpu = &adreno_gpu->base;
934 unsigned int i;
935
936 for (i = 0; i < ARRAY_SIZE(adreno_gpu->info->fw); i++)
937 release_firmware(adreno_gpu->fw[i]);
938
939 icc_put(gpu->icc_path);
940
941 msm_gpu_cleanup(&adreno_gpu->base);
942 }
943