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drm/etnaviv: (re-)protect fence allocation with GPU mutex
[mirror_ubuntu-zesty-kernel.git] / drivers / gpu / drm / etnaviv / etnaviv_gpu.c
1 /*
2 * Copyright (C) 2015 Etnaviv Project
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published by
6 * the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16
17 #include <linux/component.h>
18 #include <linux/dma-fence.h>
19 #include <linux/moduleparam.h>
20 #include <linux/of_device.h>
21 #include "etnaviv_dump.h"
22 #include "etnaviv_gpu.h"
23 #include "etnaviv_gem.h"
24 #include "etnaviv_mmu.h"
25 #include "common.xml.h"
26 #include "state.xml.h"
27 #include "state_hi.xml.h"
28 #include "cmdstream.xml.h"
29
30 static const struct platform_device_id gpu_ids[] = {
31 { .name = "etnaviv-gpu,2d" },
32 { },
33 };
34
35 static bool etnaviv_dump_core = true;
36 module_param_named(dump_core, etnaviv_dump_core, bool, 0600);
37
38 /*
39 * Driver functions:
40 */
41
42 int etnaviv_gpu_get_param(struct etnaviv_gpu *gpu, u32 param, u64 *value)
43 {
44 switch (param) {
45 case ETNAVIV_PARAM_GPU_MODEL:
46 *value = gpu->identity.model;
47 break;
48
49 case ETNAVIV_PARAM_GPU_REVISION:
50 *value = gpu->identity.revision;
51 break;
52
53 case ETNAVIV_PARAM_GPU_FEATURES_0:
54 *value = gpu->identity.features;
55 break;
56
57 case ETNAVIV_PARAM_GPU_FEATURES_1:
58 *value = gpu->identity.minor_features0;
59 break;
60
61 case ETNAVIV_PARAM_GPU_FEATURES_2:
62 *value = gpu->identity.minor_features1;
63 break;
64
65 case ETNAVIV_PARAM_GPU_FEATURES_3:
66 *value = gpu->identity.minor_features2;
67 break;
68
69 case ETNAVIV_PARAM_GPU_FEATURES_4:
70 *value = gpu->identity.minor_features3;
71 break;
72
73 case ETNAVIV_PARAM_GPU_FEATURES_5:
74 *value = gpu->identity.minor_features4;
75 break;
76
77 case ETNAVIV_PARAM_GPU_FEATURES_6:
78 *value = gpu->identity.minor_features5;
79 break;
80
81 case ETNAVIV_PARAM_GPU_STREAM_COUNT:
82 *value = gpu->identity.stream_count;
83 break;
84
85 case ETNAVIV_PARAM_GPU_REGISTER_MAX:
86 *value = gpu->identity.register_max;
87 break;
88
89 case ETNAVIV_PARAM_GPU_THREAD_COUNT:
90 *value = gpu->identity.thread_count;
91 break;
92
93 case ETNAVIV_PARAM_GPU_VERTEX_CACHE_SIZE:
94 *value = gpu->identity.vertex_cache_size;
95 break;
96
97 case ETNAVIV_PARAM_GPU_SHADER_CORE_COUNT:
98 *value = gpu->identity.shader_core_count;
99 break;
100
101 case ETNAVIV_PARAM_GPU_PIXEL_PIPES:
102 *value = gpu->identity.pixel_pipes;
103 break;
104
105 case ETNAVIV_PARAM_GPU_VERTEX_OUTPUT_BUFFER_SIZE:
106 *value = gpu->identity.vertex_output_buffer_size;
107 break;
108
109 case ETNAVIV_PARAM_GPU_BUFFER_SIZE:
110 *value = gpu->identity.buffer_size;
111 break;
112
113 case ETNAVIV_PARAM_GPU_INSTRUCTION_COUNT:
114 *value = gpu->identity.instruction_count;
115 break;
116
117 case ETNAVIV_PARAM_GPU_NUM_CONSTANTS:
118 *value = gpu->identity.num_constants;
119 break;
120
121 case ETNAVIV_PARAM_GPU_NUM_VARYINGS:
122 *value = gpu->identity.varyings_count;
123 break;
124
125 default:
126 DBG("%s: invalid param: %u", dev_name(gpu->dev), param);
127 return -EINVAL;
128 }
129
130 return 0;
131 }
132
133
134 #define etnaviv_is_model_rev(gpu, mod, rev) \
135 ((gpu)->identity.model == chipModel_##mod && \
136 (gpu)->identity.revision == rev)
137 #define etnaviv_field(val, field) \
138 (((val) & field##__MASK) >> field##__SHIFT)
139
140 static void etnaviv_hw_specs(struct etnaviv_gpu *gpu)
141 {
142 if (gpu->identity.minor_features0 &
143 chipMinorFeatures0_MORE_MINOR_FEATURES) {
144 u32 specs[4];
145 unsigned int streams;
146
147 specs[0] = gpu_read(gpu, VIVS_HI_CHIP_SPECS);
148 specs[1] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_2);
149 specs[2] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_3);
150 specs[3] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_4);
151
152 gpu->identity.stream_count = etnaviv_field(specs[0],
153 VIVS_HI_CHIP_SPECS_STREAM_COUNT);
154 gpu->identity.register_max = etnaviv_field(specs[0],
155 VIVS_HI_CHIP_SPECS_REGISTER_MAX);
156 gpu->identity.thread_count = etnaviv_field(specs[0],
157 VIVS_HI_CHIP_SPECS_THREAD_COUNT);
158 gpu->identity.vertex_cache_size = etnaviv_field(specs[0],
159 VIVS_HI_CHIP_SPECS_VERTEX_CACHE_SIZE);
160 gpu->identity.shader_core_count = etnaviv_field(specs[0],
161 VIVS_HI_CHIP_SPECS_SHADER_CORE_COUNT);
162 gpu->identity.pixel_pipes = etnaviv_field(specs[0],
163 VIVS_HI_CHIP_SPECS_PIXEL_PIPES);
164 gpu->identity.vertex_output_buffer_size =
165 etnaviv_field(specs[0],
166 VIVS_HI_CHIP_SPECS_VERTEX_OUTPUT_BUFFER_SIZE);
167
168 gpu->identity.buffer_size = etnaviv_field(specs[1],
169 VIVS_HI_CHIP_SPECS_2_BUFFER_SIZE);
170 gpu->identity.instruction_count = etnaviv_field(specs[1],
171 VIVS_HI_CHIP_SPECS_2_INSTRUCTION_COUNT);
172 gpu->identity.num_constants = etnaviv_field(specs[1],
173 VIVS_HI_CHIP_SPECS_2_NUM_CONSTANTS);
174
175 gpu->identity.varyings_count = etnaviv_field(specs[2],
176 VIVS_HI_CHIP_SPECS_3_VARYINGS_COUNT);
177
178 /* This overrides the value from older register if non-zero */
179 streams = etnaviv_field(specs[3],
180 VIVS_HI_CHIP_SPECS_4_STREAM_COUNT);
181 if (streams)
182 gpu->identity.stream_count = streams;
183 }
184
185 /* Fill in the stream count if not specified */
186 if (gpu->identity.stream_count == 0) {
187 if (gpu->identity.model >= 0x1000)
188 gpu->identity.stream_count = 4;
189 else
190 gpu->identity.stream_count = 1;
191 }
192
193 /* Convert the register max value */
194 if (gpu->identity.register_max)
195 gpu->identity.register_max = 1 << gpu->identity.register_max;
196 else if (gpu->identity.model == chipModel_GC400)
197 gpu->identity.register_max = 32;
198 else
199 gpu->identity.register_max = 64;
200
201 /* Convert thread count */
202 if (gpu->identity.thread_count)
203 gpu->identity.thread_count = 1 << gpu->identity.thread_count;
204 else if (gpu->identity.model == chipModel_GC400)
205 gpu->identity.thread_count = 64;
206 else if (gpu->identity.model == chipModel_GC500 ||
207 gpu->identity.model == chipModel_GC530)
208 gpu->identity.thread_count = 128;
209 else
210 gpu->identity.thread_count = 256;
211
212 if (gpu->identity.vertex_cache_size == 0)
213 gpu->identity.vertex_cache_size = 8;
214
215 if (gpu->identity.shader_core_count == 0) {
216 if (gpu->identity.model >= 0x1000)
217 gpu->identity.shader_core_count = 2;
218 else
219 gpu->identity.shader_core_count = 1;
220 }
221
222 if (gpu->identity.pixel_pipes == 0)
223 gpu->identity.pixel_pipes = 1;
224
225 /* Convert virtex buffer size */
226 if (gpu->identity.vertex_output_buffer_size) {
227 gpu->identity.vertex_output_buffer_size =
228 1 << gpu->identity.vertex_output_buffer_size;
229 } else if (gpu->identity.model == chipModel_GC400) {
230 if (gpu->identity.revision < 0x4000)
231 gpu->identity.vertex_output_buffer_size = 512;
232 else if (gpu->identity.revision < 0x4200)
233 gpu->identity.vertex_output_buffer_size = 256;
234 else
235 gpu->identity.vertex_output_buffer_size = 128;
236 } else {
237 gpu->identity.vertex_output_buffer_size = 512;
238 }
239
240 switch (gpu->identity.instruction_count) {
241 case 0:
242 if (etnaviv_is_model_rev(gpu, GC2000, 0x5108) ||
243 gpu->identity.model == chipModel_GC880)
244 gpu->identity.instruction_count = 512;
245 else
246 gpu->identity.instruction_count = 256;
247 break;
248
249 case 1:
250 gpu->identity.instruction_count = 1024;
251 break;
252
253 case 2:
254 gpu->identity.instruction_count = 2048;
255 break;
256
257 default:
258 gpu->identity.instruction_count = 256;
259 break;
260 }
261
262 if (gpu->identity.num_constants == 0)
263 gpu->identity.num_constants = 168;
264
265 if (gpu->identity.varyings_count == 0) {
266 if (gpu->identity.minor_features1 & chipMinorFeatures1_HALTI0)
267 gpu->identity.varyings_count = 12;
268 else
269 gpu->identity.varyings_count = 8;
270 }
271
272 /*
273 * For some cores, two varyings are consumed for position, so the
274 * maximum varying count needs to be reduced by one.
275 */
276 if (etnaviv_is_model_rev(gpu, GC5000, 0x5434) ||
277 etnaviv_is_model_rev(gpu, GC4000, 0x5222) ||
278 etnaviv_is_model_rev(gpu, GC4000, 0x5245) ||
279 etnaviv_is_model_rev(gpu, GC4000, 0x5208) ||
280 etnaviv_is_model_rev(gpu, GC3000, 0x5435) ||
281 etnaviv_is_model_rev(gpu, GC2200, 0x5244) ||
282 etnaviv_is_model_rev(gpu, GC2100, 0x5108) ||
283 etnaviv_is_model_rev(gpu, GC2000, 0x5108) ||
284 etnaviv_is_model_rev(gpu, GC1500, 0x5246) ||
285 etnaviv_is_model_rev(gpu, GC880, 0x5107) ||
286 etnaviv_is_model_rev(gpu, GC880, 0x5106))
287 gpu->identity.varyings_count -= 1;
288 }
289
290 static void etnaviv_hw_identify(struct etnaviv_gpu *gpu)
291 {
292 u32 chipIdentity;
293
294 chipIdentity = gpu_read(gpu, VIVS_HI_CHIP_IDENTITY);
295
296 /* Special case for older graphic cores. */
297 if (etnaviv_field(chipIdentity, VIVS_HI_CHIP_IDENTITY_FAMILY) == 0x01) {
298 gpu->identity.model = chipModel_GC500;
299 gpu->identity.revision = etnaviv_field(chipIdentity,
300 VIVS_HI_CHIP_IDENTITY_REVISION);
301 } else {
302
303 gpu->identity.model = gpu_read(gpu, VIVS_HI_CHIP_MODEL);
304 gpu->identity.revision = gpu_read(gpu, VIVS_HI_CHIP_REV);
305
306 /*
307 * !!!! HACK ALERT !!!!
308 * Because people change device IDs without letting software
309 * know about it - here is the hack to make it all look the
310 * same. Only for GC400 family.
311 */
312 if ((gpu->identity.model & 0xff00) == 0x0400 &&
313 gpu->identity.model != chipModel_GC420) {
314 gpu->identity.model = gpu->identity.model & 0x0400;
315 }
316
317 /* Another special case */
318 if (etnaviv_is_model_rev(gpu, GC300, 0x2201)) {
319 u32 chipDate = gpu_read(gpu, VIVS_HI_CHIP_DATE);
320 u32 chipTime = gpu_read(gpu, VIVS_HI_CHIP_TIME);
321
322 if (chipDate == 0x20080814 && chipTime == 0x12051100) {
323 /*
324 * This IP has an ECO; put the correct
325 * revision in it.
326 */
327 gpu->identity.revision = 0x1051;
328 }
329 }
330
331 /*
332 * NXP likes to call the GPU on the i.MX6QP GC2000+, but in
333 * reality it's just a re-branded GC3000. We can identify this
334 * core by the upper half of the revision register being all 1.
335 * Fix model/rev here, so all other places can refer to this
336 * core by its real identity.
337 */
338 if (etnaviv_is_model_rev(gpu, GC2000, 0xffff5450)) {
339 gpu->identity.model = chipModel_GC3000;
340 gpu->identity.revision &= 0xffff;
341 }
342 }
343
344 dev_info(gpu->dev, "model: GC%x, revision: %x\n",
345 gpu->identity.model, gpu->identity.revision);
346
347 gpu->identity.features = gpu_read(gpu, VIVS_HI_CHIP_FEATURE);
348
349 /* Disable fast clear on GC700. */
350 if (gpu->identity.model == chipModel_GC700)
351 gpu->identity.features &= ~chipFeatures_FAST_CLEAR;
352
353 if ((gpu->identity.model == chipModel_GC500 &&
354 gpu->identity.revision < 2) ||
355 (gpu->identity.model == chipModel_GC300 &&
356 gpu->identity.revision < 0x2000)) {
357
358 /*
359 * GC500 rev 1.x and GC300 rev < 2.0 doesn't have these
360 * registers.
361 */
362 gpu->identity.minor_features0 = 0;
363 gpu->identity.minor_features1 = 0;
364 gpu->identity.minor_features2 = 0;
365 gpu->identity.minor_features3 = 0;
366 gpu->identity.minor_features4 = 0;
367 gpu->identity.minor_features5 = 0;
368 } else
369 gpu->identity.minor_features0 =
370 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_0);
371
372 if (gpu->identity.minor_features0 &
373 chipMinorFeatures0_MORE_MINOR_FEATURES) {
374 gpu->identity.minor_features1 =
375 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_1);
376 gpu->identity.minor_features2 =
377 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_2);
378 gpu->identity.minor_features3 =
379 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_3);
380 gpu->identity.minor_features4 =
381 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_4);
382 gpu->identity.minor_features5 =
383 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_5);
384 }
385
386 /* GC600 idle register reports zero bits where modules aren't present */
387 if (gpu->identity.model == chipModel_GC600) {
388 gpu->idle_mask = VIVS_HI_IDLE_STATE_TX |
389 VIVS_HI_IDLE_STATE_RA |
390 VIVS_HI_IDLE_STATE_SE |
391 VIVS_HI_IDLE_STATE_PA |
392 VIVS_HI_IDLE_STATE_SH |
393 VIVS_HI_IDLE_STATE_PE |
394 VIVS_HI_IDLE_STATE_DE |
395 VIVS_HI_IDLE_STATE_FE;
396 } else {
397 gpu->idle_mask = ~VIVS_HI_IDLE_STATE_AXI_LP;
398 }
399
400 etnaviv_hw_specs(gpu);
401 }
402
403 static void etnaviv_gpu_load_clock(struct etnaviv_gpu *gpu, u32 clock)
404 {
405 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, clock |
406 VIVS_HI_CLOCK_CONTROL_FSCALE_CMD_LOAD);
407 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, clock);
408 }
409
410 static int etnaviv_hw_reset(struct etnaviv_gpu *gpu)
411 {
412 u32 control, idle;
413 unsigned long timeout;
414 bool failed = true;
415
416 /* TODO
417 *
418 * - clock gating
419 * - puls eater
420 * - what about VG?
421 */
422
423 /* We hope that the GPU resets in under one second */
424 timeout = jiffies + msecs_to_jiffies(1000);
425
426 while (time_is_after_jiffies(timeout)) {
427 control = VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS |
428 VIVS_HI_CLOCK_CONTROL_FSCALE_VAL(0x40);
429
430 /* enable clock */
431 etnaviv_gpu_load_clock(gpu, control);
432
433 /* Wait for stable clock. Vivante's code waited for 1ms */
434 usleep_range(1000, 10000);
435
436 /* isolate the GPU. */
437 control |= VIVS_HI_CLOCK_CONTROL_ISOLATE_GPU;
438 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control);
439
440 /* set soft reset. */
441 control |= VIVS_HI_CLOCK_CONTROL_SOFT_RESET;
442 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control);
443
444 /* wait for reset. */
445 msleep(1);
446
447 /* reset soft reset bit. */
448 control &= ~VIVS_HI_CLOCK_CONTROL_SOFT_RESET;
449 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control);
450
451 /* reset GPU isolation. */
452 control &= ~VIVS_HI_CLOCK_CONTROL_ISOLATE_GPU;
453 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control);
454
455 /* read idle register. */
456 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE);
457
458 /* try reseting again if FE it not idle */
459 if ((idle & VIVS_HI_IDLE_STATE_FE) == 0) {
460 dev_dbg(gpu->dev, "FE is not idle\n");
461 continue;
462 }
463
464 /* read reset register. */
465 control = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL);
466
467 /* is the GPU idle? */
468 if (((control & VIVS_HI_CLOCK_CONTROL_IDLE_3D) == 0) ||
469 ((control & VIVS_HI_CLOCK_CONTROL_IDLE_2D) == 0)) {
470 dev_dbg(gpu->dev, "GPU is not idle\n");
471 continue;
472 }
473
474 failed = false;
475 break;
476 }
477
478 if (failed) {
479 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE);
480 control = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL);
481
482 dev_err(gpu->dev, "GPU failed to reset: FE %sidle, 3D %sidle, 2D %sidle\n",
483 idle & VIVS_HI_IDLE_STATE_FE ? "" : "not ",
484 control & VIVS_HI_CLOCK_CONTROL_IDLE_3D ? "" : "not ",
485 control & VIVS_HI_CLOCK_CONTROL_IDLE_2D ? "" : "not ");
486
487 return -EBUSY;
488 }
489
490 /* We rely on the GPU running, so program the clock */
491 control = VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS |
492 VIVS_HI_CLOCK_CONTROL_FSCALE_VAL(0x40);
493
494 /* enable clock */
495 etnaviv_gpu_load_clock(gpu, control);
496
497 return 0;
498 }
499
500 static void etnaviv_gpu_enable_mlcg(struct etnaviv_gpu *gpu)
501 {
502 u32 pmc, ppc;
503
504 /* enable clock gating */
505 ppc = gpu_read(gpu, VIVS_PM_POWER_CONTROLS);
506 ppc |= VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING;
507
508 /* Disable stall module clock gating for 4.3.0.1 and 4.3.0.2 revs */
509 if (gpu->identity.revision == 0x4301 ||
510 gpu->identity.revision == 0x4302)
511 ppc |= VIVS_PM_POWER_CONTROLS_DISABLE_STALL_MODULE_CLOCK_GATING;
512
513 gpu_write(gpu, VIVS_PM_POWER_CONTROLS, ppc);
514
515 pmc = gpu_read(gpu, VIVS_PM_MODULE_CONTROLS);
516
517 /* Disable PA clock gating for GC400+ except for GC420 */
518 if (gpu->identity.model >= chipModel_GC400 &&
519 gpu->identity.model != chipModel_GC420)
520 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PA;
521
522 /*
523 * Disable PE clock gating on revs < 5.0.0.0 when HZ is
524 * present without a bug fix.
525 */
526 if (gpu->identity.revision < 0x5000 &&
527 gpu->identity.minor_features0 & chipMinorFeatures0_HZ &&
528 !(gpu->identity.minor_features1 &
529 chipMinorFeatures1_DISABLE_PE_GATING))
530 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PE;
531
532 if (gpu->identity.revision < 0x5422)
533 pmc |= BIT(15); /* Unknown bit */
534
535 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_HZ;
536 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_EZ;
537
538 gpu_write(gpu, VIVS_PM_MODULE_CONTROLS, pmc);
539 }
540
541 void etnaviv_gpu_start_fe(struct etnaviv_gpu *gpu, u32 address, u16 prefetch)
542 {
543 gpu_write(gpu, VIVS_FE_COMMAND_ADDRESS, address);
544 gpu_write(gpu, VIVS_FE_COMMAND_CONTROL,
545 VIVS_FE_COMMAND_CONTROL_ENABLE |
546 VIVS_FE_COMMAND_CONTROL_PREFETCH(prefetch));
547 }
548
549 static void etnaviv_gpu_hw_init(struct etnaviv_gpu *gpu)
550 {
551 u16 prefetch;
552
553 if ((etnaviv_is_model_rev(gpu, GC320, 0x5007) ||
554 etnaviv_is_model_rev(gpu, GC320, 0x5220)) &&
555 gpu_read(gpu, VIVS_HI_CHIP_TIME) != 0x2062400) {
556 u32 mc_memory_debug;
557
558 mc_memory_debug = gpu_read(gpu, VIVS_MC_DEBUG_MEMORY) & ~0xff;
559
560 if (gpu->identity.revision == 0x5007)
561 mc_memory_debug |= 0x0c;
562 else
563 mc_memory_debug |= 0x08;
564
565 gpu_write(gpu, VIVS_MC_DEBUG_MEMORY, mc_memory_debug);
566 }
567
568 /* enable module-level clock gating */
569 etnaviv_gpu_enable_mlcg(gpu);
570
571 /*
572 * Update GPU AXI cache atttribute to "cacheable, no allocate".
573 * This is necessary to prevent the iMX6 SoC locking up.
574 */
575 gpu_write(gpu, VIVS_HI_AXI_CONFIG,
576 VIVS_HI_AXI_CONFIG_AWCACHE(2) |
577 VIVS_HI_AXI_CONFIG_ARCACHE(2));
578
579 /* GC2000 rev 5108 needs a special bus config */
580 if (etnaviv_is_model_rev(gpu, GC2000, 0x5108)) {
581 u32 bus_config = gpu_read(gpu, VIVS_MC_BUS_CONFIG);
582 bus_config &= ~(VIVS_MC_BUS_CONFIG_FE_BUS_CONFIG__MASK |
583 VIVS_MC_BUS_CONFIG_TX_BUS_CONFIG__MASK);
584 bus_config |= VIVS_MC_BUS_CONFIG_FE_BUS_CONFIG(1) |
585 VIVS_MC_BUS_CONFIG_TX_BUS_CONFIG(0);
586 gpu_write(gpu, VIVS_MC_BUS_CONFIG, bus_config);
587 }
588
589 /* setup the MMU */
590 etnaviv_iommu_restore(gpu);
591
592 /* Start command processor */
593 prefetch = etnaviv_buffer_init(gpu);
594
595 gpu_write(gpu, VIVS_HI_INTR_ENBL, ~0U);
596 etnaviv_gpu_start_fe(gpu, etnaviv_iommu_get_cmdbuf_va(gpu, gpu->buffer),
597 prefetch);
598 }
599
600 int etnaviv_gpu_init(struct etnaviv_gpu *gpu)
601 {
602 int ret, i;
603
604 ret = pm_runtime_get_sync(gpu->dev);
605 if (ret < 0) {
606 dev_err(gpu->dev, "Failed to enable GPU power domain\n");
607 return ret;
608 }
609
610 etnaviv_hw_identify(gpu);
611
612 if (gpu->identity.model == 0) {
613 dev_err(gpu->dev, "Unknown GPU model\n");
614 ret = -ENXIO;
615 goto fail;
616 }
617
618 /* Exclude VG cores with FE2.0 */
619 if (gpu->identity.features & chipFeatures_PIPE_VG &&
620 gpu->identity.features & chipFeatures_FE20) {
621 dev_info(gpu->dev, "Ignoring GPU with VG and FE2.0\n");
622 ret = -ENXIO;
623 goto fail;
624 }
625
626 /*
627 * Set the GPU linear window to be at the end of the DMA window, where
628 * the CMA area is likely to reside. This ensures that we are able to
629 * map the command buffers while having the linear window overlap as
630 * much RAM as possible, so we can optimize mappings for other buffers.
631 *
632 * For 3D cores only do this if MC2.0 is present, as with MC1.0 it leads
633 * to different views of the memory on the individual engines.
634 */
635 if (!(gpu->identity.features & chipFeatures_PIPE_3D) ||
636 (gpu->identity.minor_features0 & chipMinorFeatures0_MC20)) {
637 u32 dma_mask = (u32)dma_get_required_mask(gpu->dev);
638 if (dma_mask < PHYS_OFFSET + SZ_2G)
639 gpu->memory_base = PHYS_OFFSET;
640 else
641 gpu->memory_base = dma_mask - SZ_2G + 1;
642 } else if (PHYS_OFFSET >= SZ_2G) {
643 dev_info(gpu->dev, "Need to move linear window on MC1.0, disabling TS\n");
644 gpu->memory_base = PHYS_OFFSET;
645 gpu->identity.features &= ~chipFeatures_FAST_CLEAR;
646 }
647
648 ret = etnaviv_hw_reset(gpu);
649 if (ret) {
650 dev_err(gpu->dev, "GPU reset failed\n");
651 goto fail;
652 }
653
654 gpu->mmu = etnaviv_iommu_new(gpu);
655 if (IS_ERR(gpu->mmu)) {
656 dev_err(gpu->dev, "Failed to instantiate GPU IOMMU\n");
657 ret = PTR_ERR(gpu->mmu);
658 goto fail;
659 }
660
661 /* Create buffer: */
662 gpu->buffer = etnaviv_gpu_cmdbuf_new(gpu, PAGE_SIZE, 0);
663 if (!gpu->buffer) {
664 ret = -ENOMEM;
665 dev_err(gpu->dev, "could not create command buffer\n");
666 goto destroy_iommu;
667 }
668
669 if (gpu->mmu->version == ETNAVIV_IOMMU_V1 &&
670 gpu->buffer->paddr - gpu->memory_base > 0x80000000) {
671 ret = -EINVAL;
672 dev_err(gpu->dev,
673 "command buffer outside valid memory window\n");
674 goto free_buffer;
675 }
676
677 /* Setup event management */
678 spin_lock_init(&gpu->event_spinlock);
679 init_completion(&gpu->event_free);
680 for (i = 0; i < ARRAY_SIZE(gpu->event); i++) {
681 gpu->event[i].used = false;
682 complete(&gpu->event_free);
683 }
684
685 /* Now program the hardware */
686 mutex_lock(&gpu->lock);
687 etnaviv_gpu_hw_init(gpu);
688 gpu->exec_state = -1;
689 mutex_unlock(&gpu->lock);
690
691 pm_runtime_mark_last_busy(gpu->dev);
692 pm_runtime_put_autosuspend(gpu->dev);
693
694 return 0;
695
696 free_buffer:
697 etnaviv_gpu_cmdbuf_free(gpu->buffer);
698 gpu->buffer = NULL;
699 destroy_iommu:
700 etnaviv_iommu_destroy(gpu->mmu);
701 gpu->mmu = NULL;
702 fail:
703 pm_runtime_mark_last_busy(gpu->dev);
704 pm_runtime_put_autosuspend(gpu->dev);
705
706 return ret;
707 }
708
709 #ifdef CONFIG_DEBUG_FS
710 struct dma_debug {
711 u32 address[2];
712 u32 state[2];
713 };
714
715 static void verify_dma(struct etnaviv_gpu *gpu, struct dma_debug *debug)
716 {
717 u32 i;
718
719 debug->address[0] = gpu_read(gpu, VIVS_FE_DMA_ADDRESS);
720 debug->state[0] = gpu_read(gpu, VIVS_FE_DMA_DEBUG_STATE);
721
722 for (i = 0; i < 500; i++) {
723 debug->address[1] = gpu_read(gpu, VIVS_FE_DMA_ADDRESS);
724 debug->state[1] = gpu_read(gpu, VIVS_FE_DMA_DEBUG_STATE);
725
726 if (debug->address[0] != debug->address[1])
727 break;
728
729 if (debug->state[0] != debug->state[1])
730 break;
731 }
732 }
733
734 int etnaviv_gpu_debugfs(struct etnaviv_gpu *gpu, struct seq_file *m)
735 {
736 struct dma_debug debug;
737 u32 dma_lo, dma_hi, axi, idle;
738 int ret;
739
740 seq_printf(m, "%s Status:\n", dev_name(gpu->dev));
741
742 ret = pm_runtime_get_sync(gpu->dev);
743 if (ret < 0)
744 return ret;
745
746 dma_lo = gpu_read(gpu, VIVS_FE_DMA_LOW);
747 dma_hi = gpu_read(gpu, VIVS_FE_DMA_HIGH);
748 axi = gpu_read(gpu, VIVS_HI_AXI_STATUS);
749 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE);
750
751 verify_dma(gpu, &debug);
752
753 seq_puts(m, "\tfeatures\n");
754 seq_printf(m, "\t minor_features0: 0x%08x\n",
755 gpu->identity.minor_features0);
756 seq_printf(m, "\t minor_features1: 0x%08x\n",
757 gpu->identity.minor_features1);
758 seq_printf(m, "\t minor_features2: 0x%08x\n",
759 gpu->identity.minor_features2);
760 seq_printf(m, "\t minor_features3: 0x%08x\n",
761 gpu->identity.minor_features3);
762 seq_printf(m, "\t minor_features4: 0x%08x\n",
763 gpu->identity.minor_features4);
764 seq_printf(m, "\t minor_features5: 0x%08x\n",
765 gpu->identity.minor_features5);
766
767 seq_puts(m, "\tspecs\n");
768 seq_printf(m, "\t stream_count: %d\n",
769 gpu->identity.stream_count);
770 seq_printf(m, "\t register_max: %d\n",
771 gpu->identity.register_max);
772 seq_printf(m, "\t thread_count: %d\n",
773 gpu->identity.thread_count);
774 seq_printf(m, "\t vertex_cache_size: %d\n",
775 gpu->identity.vertex_cache_size);
776 seq_printf(m, "\t shader_core_count: %d\n",
777 gpu->identity.shader_core_count);
778 seq_printf(m, "\t pixel_pipes: %d\n",
779 gpu->identity.pixel_pipes);
780 seq_printf(m, "\t vertex_output_buffer_size: %d\n",
781 gpu->identity.vertex_output_buffer_size);
782 seq_printf(m, "\t buffer_size: %d\n",
783 gpu->identity.buffer_size);
784 seq_printf(m, "\t instruction_count: %d\n",
785 gpu->identity.instruction_count);
786 seq_printf(m, "\t num_constants: %d\n",
787 gpu->identity.num_constants);
788 seq_printf(m, "\t varyings_count: %d\n",
789 gpu->identity.varyings_count);
790
791 seq_printf(m, "\taxi: 0x%08x\n", axi);
792 seq_printf(m, "\tidle: 0x%08x\n", idle);
793 idle |= ~gpu->idle_mask & ~VIVS_HI_IDLE_STATE_AXI_LP;
794 if ((idle & VIVS_HI_IDLE_STATE_FE) == 0)
795 seq_puts(m, "\t FE is not idle\n");
796 if ((idle & VIVS_HI_IDLE_STATE_DE) == 0)
797 seq_puts(m, "\t DE is not idle\n");
798 if ((idle & VIVS_HI_IDLE_STATE_PE) == 0)
799 seq_puts(m, "\t PE is not idle\n");
800 if ((idle & VIVS_HI_IDLE_STATE_SH) == 0)
801 seq_puts(m, "\t SH is not idle\n");
802 if ((idle & VIVS_HI_IDLE_STATE_PA) == 0)
803 seq_puts(m, "\t PA is not idle\n");
804 if ((idle & VIVS_HI_IDLE_STATE_SE) == 0)
805 seq_puts(m, "\t SE is not idle\n");
806 if ((idle & VIVS_HI_IDLE_STATE_RA) == 0)
807 seq_puts(m, "\t RA is not idle\n");
808 if ((idle & VIVS_HI_IDLE_STATE_TX) == 0)
809 seq_puts(m, "\t TX is not idle\n");
810 if ((idle & VIVS_HI_IDLE_STATE_VG) == 0)
811 seq_puts(m, "\t VG is not idle\n");
812 if ((idle & VIVS_HI_IDLE_STATE_IM) == 0)
813 seq_puts(m, "\t IM is not idle\n");
814 if ((idle & VIVS_HI_IDLE_STATE_FP) == 0)
815 seq_puts(m, "\t FP is not idle\n");
816 if ((idle & VIVS_HI_IDLE_STATE_TS) == 0)
817 seq_puts(m, "\t TS is not idle\n");
818 if (idle & VIVS_HI_IDLE_STATE_AXI_LP)
819 seq_puts(m, "\t AXI low power mode\n");
820
821 if (gpu->identity.features & chipFeatures_DEBUG_MODE) {
822 u32 read0 = gpu_read(gpu, VIVS_MC_DEBUG_READ0);
823 u32 read1 = gpu_read(gpu, VIVS_MC_DEBUG_READ1);
824 u32 write = gpu_read(gpu, VIVS_MC_DEBUG_WRITE);
825
826 seq_puts(m, "\tMC\n");
827 seq_printf(m, "\t read0: 0x%08x\n", read0);
828 seq_printf(m, "\t read1: 0x%08x\n", read1);
829 seq_printf(m, "\t write: 0x%08x\n", write);
830 }
831
832 seq_puts(m, "\tDMA ");
833
834 if (debug.address[0] == debug.address[1] &&
835 debug.state[0] == debug.state[1]) {
836 seq_puts(m, "seems to be stuck\n");
837 } else if (debug.address[0] == debug.address[1]) {
838 seq_puts(m, "address is constant\n");
839 } else {
840 seq_puts(m, "is running\n");
841 }
842
843 seq_printf(m, "\t address 0: 0x%08x\n", debug.address[0]);
844 seq_printf(m, "\t address 1: 0x%08x\n", debug.address[1]);
845 seq_printf(m, "\t state 0: 0x%08x\n", debug.state[0]);
846 seq_printf(m, "\t state 1: 0x%08x\n", debug.state[1]);
847 seq_printf(m, "\t last fetch 64 bit word: 0x%08x 0x%08x\n",
848 dma_lo, dma_hi);
849
850 ret = 0;
851
852 pm_runtime_mark_last_busy(gpu->dev);
853 pm_runtime_put_autosuspend(gpu->dev);
854
855 return ret;
856 }
857 #endif
858
859 /*
860 * Hangcheck detection for locked gpu:
861 */
862 static void recover_worker(struct work_struct *work)
863 {
864 struct etnaviv_gpu *gpu = container_of(work, struct etnaviv_gpu,
865 recover_work);
866 unsigned long flags;
867 unsigned int i;
868
869 dev_err(gpu->dev, "hangcheck recover!\n");
870
871 if (pm_runtime_get_sync(gpu->dev) < 0)
872 return;
873
874 mutex_lock(&gpu->lock);
875
876 /* Only catch the first event, or when manually re-armed */
877 if (etnaviv_dump_core) {
878 etnaviv_core_dump(gpu);
879 etnaviv_dump_core = false;
880 }
881
882 etnaviv_hw_reset(gpu);
883
884 /* complete all events, the GPU won't do it after the reset */
885 spin_lock_irqsave(&gpu->event_spinlock, flags);
886 for (i = 0; i < ARRAY_SIZE(gpu->event); i++) {
887 if (!gpu->event[i].used)
888 continue;
889 dma_fence_signal(gpu->event[i].fence);
890 gpu->event[i].fence = NULL;
891 gpu->event[i].used = false;
892 complete(&gpu->event_free);
893 }
894 spin_unlock_irqrestore(&gpu->event_spinlock, flags);
895 gpu->completed_fence = gpu->active_fence;
896
897 etnaviv_gpu_hw_init(gpu);
898 gpu->lastctx = NULL;
899 gpu->exec_state = -1;
900
901 mutex_unlock(&gpu->lock);
902 pm_runtime_mark_last_busy(gpu->dev);
903 pm_runtime_put_autosuspend(gpu->dev);
904
905 /* Retire the buffer objects in a work */
906 etnaviv_queue_work(gpu->drm, &gpu->retire_work);
907 }
908
909 static void hangcheck_timer_reset(struct etnaviv_gpu *gpu)
910 {
911 DBG("%s", dev_name(gpu->dev));
912 mod_timer(&gpu->hangcheck_timer,
913 round_jiffies_up(jiffies + DRM_ETNAVIV_HANGCHECK_JIFFIES));
914 }
915
916 static void hangcheck_handler(unsigned long data)
917 {
918 struct etnaviv_gpu *gpu = (struct etnaviv_gpu *)data;
919 u32 fence = gpu->completed_fence;
920 bool progress = false;
921
922 if (fence != gpu->hangcheck_fence) {
923 gpu->hangcheck_fence = fence;
924 progress = true;
925 }
926
927 if (!progress) {
928 u32 dma_addr = gpu_read(gpu, VIVS_FE_DMA_ADDRESS);
929 int change = dma_addr - gpu->hangcheck_dma_addr;
930
931 if (change < 0 || change > 16) {
932 gpu->hangcheck_dma_addr = dma_addr;
933 progress = true;
934 }
935 }
936
937 if (!progress && fence_after(gpu->active_fence, fence)) {
938 dev_err(gpu->dev, "hangcheck detected gpu lockup!\n");
939 dev_err(gpu->dev, " completed fence: %u\n", fence);
940 dev_err(gpu->dev, " active fence: %u\n",
941 gpu->active_fence);
942 etnaviv_queue_work(gpu->drm, &gpu->recover_work);
943 }
944
945 /* if still more pending work, reset the hangcheck timer: */
946 if (fence_after(gpu->active_fence, gpu->hangcheck_fence))
947 hangcheck_timer_reset(gpu);
948 }
949
950 static void hangcheck_disable(struct etnaviv_gpu *gpu)
951 {
952 del_timer_sync(&gpu->hangcheck_timer);
953 cancel_work_sync(&gpu->recover_work);
954 }
955
956 /* fence object management */
957 struct etnaviv_fence {
958 struct etnaviv_gpu *gpu;
959 struct dma_fence base;
960 };
961
962 static inline struct etnaviv_fence *to_etnaviv_fence(struct dma_fence *fence)
963 {
964 return container_of(fence, struct etnaviv_fence, base);
965 }
966
967 static const char *etnaviv_fence_get_driver_name(struct dma_fence *fence)
968 {
969 return "etnaviv";
970 }
971
972 static const char *etnaviv_fence_get_timeline_name(struct dma_fence *fence)
973 {
974 struct etnaviv_fence *f = to_etnaviv_fence(fence);
975
976 return dev_name(f->gpu->dev);
977 }
978
979 static bool etnaviv_fence_enable_signaling(struct dma_fence *fence)
980 {
981 return true;
982 }
983
984 static bool etnaviv_fence_signaled(struct dma_fence *fence)
985 {
986 struct etnaviv_fence *f = to_etnaviv_fence(fence);
987
988 return fence_completed(f->gpu, f->base.seqno);
989 }
990
991 static void etnaviv_fence_release(struct dma_fence *fence)
992 {
993 struct etnaviv_fence *f = to_etnaviv_fence(fence);
994
995 kfree_rcu(f, base.rcu);
996 }
997
998 static const struct dma_fence_ops etnaviv_fence_ops = {
999 .get_driver_name = etnaviv_fence_get_driver_name,
1000 .get_timeline_name = etnaviv_fence_get_timeline_name,
1001 .enable_signaling = etnaviv_fence_enable_signaling,
1002 .signaled = etnaviv_fence_signaled,
1003 .wait = dma_fence_default_wait,
1004 .release = etnaviv_fence_release,
1005 };
1006
1007 static struct dma_fence *etnaviv_gpu_fence_alloc(struct etnaviv_gpu *gpu)
1008 {
1009 struct etnaviv_fence *f;
1010
1011 f = kzalloc(sizeof(*f), GFP_KERNEL);
1012 if (!f)
1013 return NULL;
1014
1015 f->gpu = gpu;
1016
1017 dma_fence_init(&f->base, &etnaviv_fence_ops, &gpu->fence_spinlock,
1018 gpu->fence_context, ++gpu->next_fence);
1019
1020 return &f->base;
1021 }
1022
1023 int etnaviv_gpu_fence_sync_obj(struct etnaviv_gem_object *etnaviv_obj,
1024 unsigned int context, bool exclusive)
1025 {
1026 struct reservation_object *robj = etnaviv_obj->resv;
1027 struct reservation_object_list *fobj;
1028 struct dma_fence *fence;
1029 int i, ret;
1030
1031 if (!exclusive) {
1032 ret = reservation_object_reserve_shared(robj);
1033 if (ret)
1034 return ret;
1035 }
1036
1037 /*
1038 * If we have any shared fences, then the exclusive fence
1039 * should be ignored as it will already have been signalled.
1040 */
1041 fobj = reservation_object_get_list(robj);
1042 if (!fobj || fobj->shared_count == 0) {
1043 /* Wait on any existing exclusive fence which isn't our own */
1044 fence = reservation_object_get_excl(robj);
1045 if (fence && fence->context != context) {
1046 ret = dma_fence_wait(fence, true);
1047 if (ret)
1048 return ret;
1049 }
1050 }
1051
1052 if (!exclusive || !fobj)
1053 return 0;
1054
1055 for (i = 0; i < fobj->shared_count; i++) {
1056 fence = rcu_dereference_protected(fobj->shared[i],
1057 reservation_object_held(robj));
1058 if (fence->context != context) {
1059 ret = dma_fence_wait(fence, true);
1060 if (ret)
1061 return ret;
1062 }
1063 }
1064
1065 return 0;
1066 }
1067
1068 /*
1069 * event management:
1070 */
1071
1072 static unsigned int event_alloc(struct etnaviv_gpu *gpu)
1073 {
1074 unsigned long ret, flags;
1075 unsigned int i, event = ~0U;
1076
1077 ret = wait_for_completion_timeout(&gpu->event_free,
1078 msecs_to_jiffies(10 * 10000));
1079 if (!ret)
1080 dev_err(gpu->dev, "wait_for_completion_timeout failed");
1081
1082 spin_lock_irqsave(&gpu->event_spinlock, flags);
1083
1084 /* find first free event */
1085 for (i = 0; i < ARRAY_SIZE(gpu->event); i++) {
1086 if (gpu->event[i].used == false) {
1087 gpu->event[i].used = true;
1088 event = i;
1089 break;
1090 }
1091 }
1092
1093 spin_unlock_irqrestore(&gpu->event_spinlock, flags);
1094
1095 return event;
1096 }
1097
1098 static void event_free(struct etnaviv_gpu *gpu, unsigned int event)
1099 {
1100 unsigned long flags;
1101
1102 spin_lock_irqsave(&gpu->event_spinlock, flags);
1103
1104 if (gpu->event[event].used == false) {
1105 dev_warn(gpu->dev, "event %u is already marked as free",
1106 event);
1107 spin_unlock_irqrestore(&gpu->event_spinlock, flags);
1108 } else {
1109 gpu->event[event].used = false;
1110 spin_unlock_irqrestore(&gpu->event_spinlock, flags);
1111
1112 complete(&gpu->event_free);
1113 }
1114 }
1115
1116 /*
1117 * Cmdstream submission/retirement:
1118 */
1119
1120 struct etnaviv_cmdbuf *etnaviv_gpu_cmdbuf_new(struct etnaviv_gpu *gpu, u32 size,
1121 size_t nr_bos)
1122 {
1123 struct etnaviv_cmdbuf *cmdbuf;
1124 size_t sz = size_vstruct(nr_bos, sizeof(cmdbuf->bo_map[0]),
1125 sizeof(*cmdbuf));
1126
1127 cmdbuf = kzalloc(sz, GFP_KERNEL);
1128 if (!cmdbuf)
1129 return NULL;
1130
1131 if (gpu->mmu->version == ETNAVIV_IOMMU_V2)
1132 size = ALIGN(size, SZ_4K);
1133
1134 cmdbuf->vaddr = dma_alloc_wc(gpu->dev, size, &cmdbuf->paddr,
1135 GFP_KERNEL);
1136 if (!cmdbuf->vaddr) {
1137 kfree(cmdbuf);
1138 return NULL;
1139 }
1140
1141 cmdbuf->gpu = gpu;
1142 cmdbuf->size = size;
1143
1144 return cmdbuf;
1145 }
1146
1147 void etnaviv_gpu_cmdbuf_free(struct etnaviv_cmdbuf *cmdbuf)
1148 {
1149 etnaviv_iommu_put_cmdbuf_va(cmdbuf->gpu, cmdbuf);
1150 dma_free_wc(cmdbuf->gpu->dev, cmdbuf->size, cmdbuf->vaddr,
1151 cmdbuf->paddr);
1152 kfree(cmdbuf);
1153 }
1154
1155 static void retire_worker(struct work_struct *work)
1156 {
1157 struct etnaviv_gpu *gpu = container_of(work, struct etnaviv_gpu,
1158 retire_work);
1159 u32 fence = gpu->completed_fence;
1160 struct etnaviv_cmdbuf *cmdbuf, *tmp;
1161 unsigned int i;
1162
1163 mutex_lock(&gpu->lock);
1164 list_for_each_entry_safe(cmdbuf, tmp, &gpu->active_cmd_list, node) {
1165 if (!dma_fence_is_signaled(cmdbuf->fence))
1166 break;
1167
1168 list_del(&cmdbuf->node);
1169 dma_fence_put(cmdbuf->fence);
1170
1171 for (i = 0; i < cmdbuf->nr_bos; i++) {
1172 struct etnaviv_vram_mapping *mapping = cmdbuf->bo_map[i];
1173 struct etnaviv_gem_object *etnaviv_obj = mapping->object;
1174
1175 atomic_dec(&etnaviv_obj->gpu_active);
1176 /* drop the refcount taken in etnaviv_gpu_submit */
1177 etnaviv_gem_mapping_unreference(mapping);
1178 }
1179
1180 etnaviv_gpu_cmdbuf_free(cmdbuf);
1181 /*
1182 * We need to balance the runtime PM count caused by
1183 * each submission. Upon submission, we increment
1184 * the runtime PM counter, and allocate one event.
1185 * So here, we put the runtime PM count for each
1186 * completed event.
1187 */
1188 pm_runtime_put_autosuspend(gpu->dev);
1189 }
1190
1191 gpu->retired_fence = fence;
1192
1193 mutex_unlock(&gpu->lock);
1194
1195 wake_up_all(&gpu->fence_event);
1196 }
1197
1198 int etnaviv_gpu_wait_fence_interruptible(struct etnaviv_gpu *gpu,
1199 u32 fence, struct timespec *timeout)
1200 {
1201 int ret;
1202
1203 if (fence_after(fence, gpu->next_fence)) {
1204 DRM_ERROR("waiting on invalid fence: %u (of %u)\n",
1205 fence, gpu->next_fence);
1206 return -EINVAL;
1207 }
1208
1209 if (!timeout) {
1210 /* No timeout was requested: just test for completion */
1211 ret = fence_completed(gpu, fence) ? 0 : -EBUSY;
1212 } else {
1213 unsigned long remaining = etnaviv_timeout_to_jiffies(timeout);
1214
1215 ret = wait_event_interruptible_timeout(gpu->fence_event,
1216 fence_completed(gpu, fence),
1217 remaining);
1218 if (ret == 0) {
1219 DBG("timeout waiting for fence: %u (retired: %u completed: %u)",
1220 fence, gpu->retired_fence,
1221 gpu->completed_fence);
1222 ret = -ETIMEDOUT;
1223 } else if (ret != -ERESTARTSYS) {
1224 ret = 0;
1225 }
1226 }
1227
1228 return ret;
1229 }
1230
1231 /*
1232 * Wait for an object to become inactive. This, on it's own, is not race
1233 * free: the object is moved by the retire worker off the active list, and
1234 * then the iova is put. Moreover, the object could be re-submitted just
1235 * after we notice that it's become inactive.
1236 *
1237 * Although the retirement happens under the gpu lock, we don't want to hold
1238 * that lock in this function while waiting.
1239 */
1240 int etnaviv_gpu_wait_obj_inactive(struct etnaviv_gpu *gpu,
1241 struct etnaviv_gem_object *etnaviv_obj, struct timespec *timeout)
1242 {
1243 unsigned long remaining;
1244 long ret;
1245
1246 if (!timeout)
1247 return !is_active(etnaviv_obj) ? 0 : -EBUSY;
1248
1249 remaining = etnaviv_timeout_to_jiffies(timeout);
1250
1251 ret = wait_event_interruptible_timeout(gpu->fence_event,
1252 !is_active(etnaviv_obj),
1253 remaining);
1254 if (ret > 0) {
1255 struct etnaviv_drm_private *priv = gpu->drm->dev_private;
1256
1257 /* Synchronise with the retire worker */
1258 flush_workqueue(priv->wq);
1259 return 0;
1260 } else if (ret == -ERESTARTSYS) {
1261 return -ERESTARTSYS;
1262 } else {
1263 return -ETIMEDOUT;
1264 }
1265 }
1266
1267 int etnaviv_gpu_pm_get_sync(struct etnaviv_gpu *gpu)
1268 {
1269 return pm_runtime_get_sync(gpu->dev);
1270 }
1271
1272 void etnaviv_gpu_pm_put(struct etnaviv_gpu *gpu)
1273 {
1274 pm_runtime_mark_last_busy(gpu->dev);
1275 pm_runtime_put_autosuspend(gpu->dev);
1276 }
1277
1278 /* add bo's to gpu's ring, and kick gpu: */
1279 int etnaviv_gpu_submit(struct etnaviv_gpu *gpu,
1280 struct etnaviv_gem_submit *submit, struct etnaviv_cmdbuf *cmdbuf)
1281 {
1282 struct dma_fence *fence;
1283 unsigned int event, i;
1284 int ret;
1285
1286 ret = etnaviv_gpu_pm_get_sync(gpu);
1287 if (ret < 0)
1288 return ret;
1289
1290 /*
1291 * TODO
1292 *
1293 * - flush
1294 * - data endian
1295 * - prefetch
1296 *
1297 */
1298
1299 event = event_alloc(gpu);
1300 if (unlikely(event == ~0U)) {
1301 DRM_ERROR("no free event\n");
1302 ret = -EBUSY;
1303 goto out_pm_put;
1304 }
1305
1306 mutex_lock(&gpu->lock);
1307
1308 fence = etnaviv_gpu_fence_alloc(gpu);
1309 if (!fence) {
1310 event_free(gpu, event);
1311 ret = -ENOMEM;
1312 goto out_pm_put;
1313 }
1314
1315 gpu->event[event].fence = fence;
1316 submit->fence = fence->seqno;
1317 gpu->active_fence = submit->fence;
1318
1319 if (gpu->lastctx != cmdbuf->ctx) {
1320 gpu->mmu->need_flush = true;
1321 gpu->switch_context = true;
1322 gpu->lastctx = cmdbuf->ctx;
1323 }
1324
1325 etnaviv_buffer_queue(gpu, event, cmdbuf);
1326
1327 cmdbuf->fence = fence;
1328 list_add_tail(&cmdbuf->node, &gpu->active_cmd_list);
1329
1330 /* We're committed to adding this command buffer, hold a PM reference */
1331 pm_runtime_get_noresume(gpu->dev);
1332
1333 for (i = 0; i < submit->nr_bos; i++) {
1334 struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
1335
1336 /* Each cmdbuf takes a refcount on the mapping */
1337 etnaviv_gem_mapping_reference(submit->bos[i].mapping);
1338 cmdbuf->bo_map[i] = submit->bos[i].mapping;
1339 atomic_inc(&etnaviv_obj->gpu_active);
1340
1341 if (submit->bos[i].flags & ETNA_SUBMIT_BO_WRITE)
1342 reservation_object_add_excl_fence(etnaviv_obj->resv,
1343 fence);
1344 else
1345 reservation_object_add_shared_fence(etnaviv_obj->resv,
1346 fence);
1347 }
1348 cmdbuf->nr_bos = submit->nr_bos;
1349 hangcheck_timer_reset(gpu);
1350 ret = 0;
1351
1352 mutex_unlock(&gpu->lock);
1353
1354 out_pm_put:
1355 etnaviv_gpu_pm_put(gpu);
1356
1357 return ret;
1358 }
1359
1360 /*
1361 * Init/Cleanup:
1362 */
1363 static irqreturn_t irq_handler(int irq, void *data)
1364 {
1365 struct etnaviv_gpu *gpu = data;
1366 irqreturn_t ret = IRQ_NONE;
1367
1368 u32 intr = gpu_read(gpu, VIVS_HI_INTR_ACKNOWLEDGE);
1369
1370 if (intr != 0) {
1371 int event;
1372
1373 pm_runtime_mark_last_busy(gpu->dev);
1374
1375 dev_dbg(gpu->dev, "intr 0x%08x\n", intr);
1376
1377 if (intr & VIVS_HI_INTR_ACKNOWLEDGE_AXI_BUS_ERROR) {
1378 dev_err(gpu->dev, "AXI bus error\n");
1379 intr &= ~VIVS_HI_INTR_ACKNOWLEDGE_AXI_BUS_ERROR;
1380 }
1381
1382 if (intr & VIVS_HI_INTR_ACKNOWLEDGE_MMU_EXCEPTION) {
1383 int i;
1384
1385 dev_err_ratelimited(gpu->dev,
1386 "MMU fault status 0x%08x\n",
1387 gpu_read(gpu, VIVS_MMUv2_STATUS));
1388 for (i = 0; i < 4; i++) {
1389 dev_err_ratelimited(gpu->dev,
1390 "MMU %d fault addr 0x%08x\n",
1391 i, gpu_read(gpu,
1392 VIVS_MMUv2_EXCEPTION_ADDR(i)));
1393 }
1394 intr &= ~VIVS_HI_INTR_ACKNOWLEDGE_MMU_EXCEPTION;
1395 }
1396
1397 while ((event = ffs(intr)) != 0) {
1398 struct dma_fence *fence;
1399
1400 event -= 1;
1401
1402 intr &= ~(1 << event);
1403
1404 dev_dbg(gpu->dev, "event %u\n", event);
1405
1406 fence = gpu->event[event].fence;
1407 gpu->event[event].fence = NULL;
1408 dma_fence_signal(fence);
1409
1410 /*
1411 * Events can be processed out of order. Eg,
1412 * - allocate and queue event 0
1413 * - allocate event 1
1414 * - event 0 completes, we process it
1415 * - allocate and queue event 0
1416 * - event 1 and event 0 complete
1417 * we can end up processing event 0 first, then 1.
1418 */
1419 if (fence_after(fence->seqno, gpu->completed_fence))
1420 gpu->completed_fence = fence->seqno;
1421
1422 event_free(gpu, event);
1423 }
1424
1425 /* Retire the buffer objects in a work */
1426 etnaviv_queue_work(gpu->drm, &gpu->retire_work);
1427
1428 ret = IRQ_HANDLED;
1429 }
1430
1431 return ret;
1432 }
1433
1434 static int etnaviv_gpu_clk_enable(struct etnaviv_gpu *gpu)
1435 {
1436 int ret;
1437
1438 if (gpu->clk_bus) {
1439 ret = clk_prepare_enable(gpu->clk_bus);
1440 if (ret)
1441 return ret;
1442 }
1443
1444 if (gpu->clk_core) {
1445 ret = clk_prepare_enable(gpu->clk_core);
1446 if (ret)
1447 goto disable_clk_bus;
1448 }
1449
1450 if (gpu->clk_shader) {
1451 ret = clk_prepare_enable(gpu->clk_shader);
1452 if (ret)
1453 goto disable_clk_core;
1454 }
1455
1456 return 0;
1457
1458 disable_clk_core:
1459 if (gpu->clk_core)
1460 clk_disable_unprepare(gpu->clk_core);
1461 disable_clk_bus:
1462 if (gpu->clk_bus)
1463 clk_disable_unprepare(gpu->clk_bus);
1464
1465 return ret;
1466 }
1467
1468 static int etnaviv_gpu_clk_disable(struct etnaviv_gpu *gpu)
1469 {
1470 if (gpu->clk_shader)
1471 clk_disable_unprepare(gpu->clk_shader);
1472 if (gpu->clk_core)
1473 clk_disable_unprepare(gpu->clk_core);
1474 if (gpu->clk_bus)
1475 clk_disable_unprepare(gpu->clk_bus);
1476
1477 return 0;
1478 }
1479
1480 int etnaviv_gpu_wait_idle(struct etnaviv_gpu *gpu, unsigned int timeout_ms)
1481 {
1482 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
1483
1484 do {
1485 u32 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE);
1486
1487 if ((idle & gpu->idle_mask) == gpu->idle_mask)
1488 return 0;
1489
1490 if (time_is_before_jiffies(timeout)) {
1491 dev_warn(gpu->dev,
1492 "timed out waiting for idle: idle=0x%x\n",
1493 idle);
1494 return -ETIMEDOUT;
1495 }
1496
1497 udelay(5);
1498 } while (1);
1499 }
1500
1501 static int etnaviv_gpu_hw_suspend(struct etnaviv_gpu *gpu)
1502 {
1503 if (gpu->buffer) {
1504 /* Replace the last WAIT with END */
1505 etnaviv_buffer_end(gpu);
1506
1507 /*
1508 * We know that only the FE is busy here, this should
1509 * happen quickly (as the WAIT is only 200 cycles). If
1510 * we fail, just warn and continue.
1511 */
1512 etnaviv_gpu_wait_idle(gpu, 100);
1513 }
1514
1515 return etnaviv_gpu_clk_disable(gpu);
1516 }
1517
1518 #ifdef CONFIG_PM
1519 static int etnaviv_gpu_hw_resume(struct etnaviv_gpu *gpu)
1520 {
1521 u32 clock;
1522 int ret;
1523
1524 ret = mutex_lock_killable(&gpu->lock);
1525 if (ret)
1526 return ret;
1527
1528 clock = VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS |
1529 VIVS_HI_CLOCK_CONTROL_FSCALE_VAL(0x40);
1530
1531 etnaviv_gpu_load_clock(gpu, clock);
1532 etnaviv_gpu_hw_init(gpu);
1533
1534 gpu->switch_context = true;
1535 gpu->exec_state = -1;
1536
1537 mutex_unlock(&gpu->lock);
1538
1539 return 0;
1540 }
1541 #endif
1542
1543 static int etnaviv_gpu_bind(struct device *dev, struct device *master,
1544 void *data)
1545 {
1546 struct drm_device *drm = data;
1547 struct etnaviv_drm_private *priv = drm->dev_private;
1548 struct etnaviv_gpu *gpu = dev_get_drvdata(dev);
1549 int ret;
1550
1551 #ifdef CONFIG_PM
1552 ret = pm_runtime_get_sync(gpu->dev);
1553 #else
1554 ret = etnaviv_gpu_clk_enable(gpu);
1555 #endif
1556 if (ret < 0)
1557 return ret;
1558
1559 gpu->drm = drm;
1560 gpu->fence_context = dma_fence_context_alloc(1);
1561 spin_lock_init(&gpu->fence_spinlock);
1562
1563 INIT_LIST_HEAD(&gpu->active_cmd_list);
1564 INIT_WORK(&gpu->retire_work, retire_worker);
1565 INIT_WORK(&gpu->recover_work, recover_worker);
1566 init_waitqueue_head(&gpu->fence_event);
1567
1568 setup_deferrable_timer(&gpu->hangcheck_timer, hangcheck_handler,
1569 (unsigned long)gpu);
1570
1571 priv->gpu[priv->num_gpus++] = gpu;
1572
1573 pm_runtime_mark_last_busy(gpu->dev);
1574 pm_runtime_put_autosuspend(gpu->dev);
1575
1576 return 0;
1577 }
1578
1579 static void etnaviv_gpu_unbind(struct device *dev, struct device *master,
1580 void *data)
1581 {
1582 struct etnaviv_gpu *gpu = dev_get_drvdata(dev);
1583
1584 DBG("%s", dev_name(gpu->dev));
1585
1586 hangcheck_disable(gpu);
1587
1588 #ifdef CONFIG_PM
1589 pm_runtime_get_sync(gpu->dev);
1590 pm_runtime_put_sync_suspend(gpu->dev);
1591 #else
1592 etnaviv_gpu_hw_suspend(gpu);
1593 #endif
1594
1595 if (gpu->buffer) {
1596 etnaviv_gpu_cmdbuf_free(gpu->buffer);
1597 gpu->buffer = NULL;
1598 }
1599
1600 if (gpu->mmu) {
1601 etnaviv_iommu_destroy(gpu->mmu);
1602 gpu->mmu = NULL;
1603 }
1604
1605 gpu->drm = NULL;
1606 }
1607
1608 static const struct component_ops gpu_ops = {
1609 .bind = etnaviv_gpu_bind,
1610 .unbind = etnaviv_gpu_unbind,
1611 };
1612
1613 static const struct of_device_id etnaviv_gpu_match[] = {
1614 {
1615 .compatible = "vivante,gc"
1616 },
1617 { /* sentinel */ }
1618 };
1619
1620 static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
1621 {
1622 struct device *dev = &pdev->dev;
1623 struct etnaviv_gpu *gpu;
1624 int err;
1625
1626 gpu = devm_kzalloc(dev, sizeof(*gpu), GFP_KERNEL);
1627 if (!gpu)
1628 return -ENOMEM;
1629
1630 gpu->dev = &pdev->dev;
1631 mutex_init(&gpu->lock);
1632
1633 /* Map registers: */
1634 gpu->mmio = etnaviv_ioremap(pdev, NULL, dev_name(gpu->dev));
1635 if (IS_ERR(gpu->mmio))
1636 return PTR_ERR(gpu->mmio);
1637
1638 /* Get Interrupt: */
1639 gpu->irq = platform_get_irq(pdev, 0);
1640 if (gpu->irq < 0) {
1641 dev_err(dev, "failed to get irq: %d\n", gpu->irq);
1642 return gpu->irq;
1643 }
1644
1645 err = devm_request_irq(&pdev->dev, gpu->irq, irq_handler, 0,
1646 dev_name(gpu->dev), gpu);
1647 if (err) {
1648 dev_err(dev, "failed to request IRQ%u: %d\n", gpu->irq, err);
1649 return err;
1650 }
1651
1652 /* Get Clocks: */
1653 gpu->clk_bus = devm_clk_get(&pdev->dev, "bus");
1654 DBG("clk_bus: %p", gpu->clk_bus);
1655 if (IS_ERR(gpu->clk_bus))
1656 gpu->clk_bus = NULL;
1657
1658 gpu->clk_core = devm_clk_get(&pdev->dev, "core");
1659 DBG("clk_core: %p", gpu->clk_core);
1660 if (IS_ERR(gpu->clk_core))
1661 gpu->clk_core = NULL;
1662
1663 gpu->clk_shader = devm_clk_get(&pdev->dev, "shader");
1664 DBG("clk_shader: %p", gpu->clk_shader);
1665 if (IS_ERR(gpu->clk_shader))
1666 gpu->clk_shader = NULL;
1667
1668 /* TODO: figure out max mapped size */
1669 dev_set_drvdata(dev, gpu);
1670
1671 /*
1672 * We treat the device as initially suspended. The runtime PM
1673 * autosuspend delay is rather arbitary: no measurements have
1674 * yet been performed to determine an appropriate value.
1675 */
1676 pm_runtime_use_autosuspend(gpu->dev);
1677 pm_runtime_set_autosuspend_delay(gpu->dev, 200);
1678 pm_runtime_enable(gpu->dev);
1679
1680 err = component_add(&pdev->dev, &gpu_ops);
1681 if (err < 0) {
1682 dev_err(&pdev->dev, "failed to register component: %d\n", err);
1683 return err;
1684 }
1685
1686 return 0;
1687 }
1688
1689 static int etnaviv_gpu_platform_remove(struct platform_device *pdev)
1690 {
1691 component_del(&pdev->dev, &gpu_ops);
1692 pm_runtime_disable(&pdev->dev);
1693 return 0;
1694 }
1695
1696 #ifdef CONFIG_PM
1697 static int etnaviv_gpu_rpm_suspend(struct device *dev)
1698 {
1699 struct etnaviv_gpu *gpu = dev_get_drvdata(dev);
1700 u32 idle, mask;
1701
1702 /* If we have outstanding fences, we're not idle */
1703 if (gpu->completed_fence != gpu->active_fence)
1704 return -EBUSY;
1705
1706 /* Check whether the hardware (except FE) is idle */
1707 mask = gpu->idle_mask & ~VIVS_HI_IDLE_STATE_FE;
1708 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE) & mask;
1709 if (idle != mask)
1710 return -EBUSY;
1711
1712 return etnaviv_gpu_hw_suspend(gpu);
1713 }
1714
1715 static int etnaviv_gpu_rpm_resume(struct device *dev)
1716 {
1717 struct etnaviv_gpu *gpu = dev_get_drvdata(dev);
1718 int ret;
1719
1720 ret = etnaviv_gpu_clk_enable(gpu);
1721 if (ret)
1722 return ret;
1723
1724 /* Re-initialise the basic hardware state */
1725 if (gpu->drm && gpu->buffer) {
1726 ret = etnaviv_gpu_hw_resume(gpu);
1727 if (ret) {
1728 etnaviv_gpu_clk_disable(gpu);
1729 return ret;
1730 }
1731 }
1732
1733 return 0;
1734 }
1735 #endif
1736
1737 static const struct dev_pm_ops etnaviv_gpu_pm_ops = {
1738 SET_RUNTIME_PM_OPS(etnaviv_gpu_rpm_suspend, etnaviv_gpu_rpm_resume,
1739 NULL)
1740 };
1741
1742 struct platform_driver etnaviv_gpu_driver = {
1743 .driver = {
1744 .name = "etnaviv-gpu",
1745 .owner = THIS_MODULE,
1746 .pm = &etnaviv_gpu_pm_ops,
1747 .of_match_table = etnaviv_gpu_match,
1748 },
1749 .probe = etnaviv_gpu_platform_probe,
1750 .remove = etnaviv_gpu_platform_remove,
1751 .id_table = gpu_ids,
1752 };
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