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[mirror_ubuntu-bionic-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
22 #include "etnaviv_cmdbuf.h"
23 #include "etnaviv_dump.h"
24 #include "etnaviv_gpu.h"
25 #include "etnaviv_gem.h"
26 #include "etnaviv_mmu.h"
27 #include "common.xml.h"
28 #include "state.xml.h"
29 #include "state_hi.xml.h"
30 #include "cmdstream.xml.h"
31
32 static const struct platform_device_id gpu_ids[] = {
33 { .name = "etnaviv-gpu,2d" },
34 { },
35 };
36
37 static bool etnaviv_dump_core = true;
38 module_param_named(dump_core, etnaviv_dump_core, bool, 0600);
39
40 /*
41 * Driver functions:
42 */
43
44 int etnaviv_gpu_get_param(struct etnaviv_gpu *gpu, u32 param, u64 *value)
45 {
46 switch (param) {
47 case ETNAVIV_PARAM_GPU_MODEL:
48 *value = gpu->identity.model;
49 break;
50
51 case ETNAVIV_PARAM_GPU_REVISION:
52 *value = gpu->identity.revision;
53 break;
54
55 case ETNAVIV_PARAM_GPU_FEATURES_0:
56 *value = gpu->identity.features;
57 break;
58
59 case ETNAVIV_PARAM_GPU_FEATURES_1:
60 *value = gpu->identity.minor_features0;
61 break;
62
63 case ETNAVIV_PARAM_GPU_FEATURES_2:
64 *value = gpu->identity.minor_features1;
65 break;
66
67 case ETNAVIV_PARAM_GPU_FEATURES_3:
68 *value = gpu->identity.minor_features2;
69 break;
70
71 case ETNAVIV_PARAM_GPU_FEATURES_4:
72 *value = gpu->identity.minor_features3;
73 break;
74
75 case ETNAVIV_PARAM_GPU_FEATURES_5:
76 *value = gpu->identity.minor_features4;
77 break;
78
79 case ETNAVIV_PARAM_GPU_FEATURES_6:
80 *value = gpu->identity.minor_features5;
81 break;
82
83 case ETNAVIV_PARAM_GPU_STREAM_COUNT:
84 *value = gpu->identity.stream_count;
85 break;
86
87 case ETNAVIV_PARAM_GPU_REGISTER_MAX:
88 *value = gpu->identity.register_max;
89 break;
90
91 case ETNAVIV_PARAM_GPU_THREAD_COUNT:
92 *value = gpu->identity.thread_count;
93 break;
94
95 case ETNAVIV_PARAM_GPU_VERTEX_CACHE_SIZE:
96 *value = gpu->identity.vertex_cache_size;
97 break;
98
99 case ETNAVIV_PARAM_GPU_SHADER_CORE_COUNT:
100 *value = gpu->identity.shader_core_count;
101 break;
102
103 case ETNAVIV_PARAM_GPU_PIXEL_PIPES:
104 *value = gpu->identity.pixel_pipes;
105 break;
106
107 case ETNAVIV_PARAM_GPU_VERTEX_OUTPUT_BUFFER_SIZE:
108 *value = gpu->identity.vertex_output_buffer_size;
109 break;
110
111 case ETNAVIV_PARAM_GPU_BUFFER_SIZE:
112 *value = gpu->identity.buffer_size;
113 break;
114
115 case ETNAVIV_PARAM_GPU_INSTRUCTION_COUNT:
116 *value = gpu->identity.instruction_count;
117 break;
118
119 case ETNAVIV_PARAM_GPU_NUM_CONSTANTS:
120 *value = gpu->identity.num_constants;
121 break;
122
123 case ETNAVIV_PARAM_GPU_NUM_VARYINGS:
124 *value = gpu->identity.varyings_count;
125 break;
126
127 default:
128 DBG("%s: invalid param: %u", dev_name(gpu->dev), param);
129 return -EINVAL;
130 }
131
132 return 0;
133 }
134
135
136 #define etnaviv_is_model_rev(gpu, mod, rev) \
137 ((gpu)->identity.model == chipModel_##mod && \
138 (gpu)->identity.revision == rev)
139 #define etnaviv_field(val, field) \
140 (((val) & field##__MASK) >> field##__SHIFT)
141
142 static void etnaviv_hw_specs(struct etnaviv_gpu *gpu)
143 {
144 if (gpu->identity.minor_features0 &
145 chipMinorFeatures0_MORE_MINOR_FEATURES) {
146 u32 specs[4];
147 unsigned int streams;
148
149 specs[0] = gpu_read(gpu, VIVS_HI_CHIP_SPECS);
150 specs[1] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_2);
151 specs[2] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_3);
152 specs[3] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_4);
153
154 gpu->identity.stream_count = etnaviv_field(specs[0],
155 VIVS_HI_CHIP_SPECS_STREAM_COUNT);
156 gpu->identity.register_max = etnaviv_field(specs[0],
157 VIVS_HI_CHIP_SPECS_REGISTER_MAX);
158 gpu->identity.thread_count = etnaviv_field(specs[0],
159 VIVS_HI_CHIP_SPECS_THREAD_COUNT);
160 gpu->identity.vertex_cache_size = etnaviv_field(specs[0],
161 VIVS_HI_CHIP_SPECS_VERTEX_CACHE_SIZE);
162 gpu->identity.shader_core_count = etnaviv_field(specs[0],
163 VIVS_HI_CHIP_SPECS_SHADER_CORE_COUNT);
164 gpu->identity.pixel_pipes = etnaviv_field(specs[0],
165 VIVS_HI_CHIP_SPECS_PIXEL_PIPES);
166 gpu->identity.vertex_output_buffer_size =
167 etnaviv_field(specs[0],
168 VIVS_HI_CHIP_SPECS_VERTEX_OUTPUT_BUFFER_SIZE);
169
170 gpu->identity.buffer_size = etnaviv_field(specs[1],
171 VIVS_HI_CHIP_SPECS_2_BUFFER_SIZE);
172 gpu->identity.instruction_count = etnaviv_field(specs[1],
173 VIVS_HI_CHIP_SPECS_2_INSTRUCTION_COUNT);
174 gpu->identity.num_constants = etnaviv_field(specs[1],
175 VIVS_HI_CHIP_SPECS_2_NUM_CONSTANTS);
176
177 gpu->identity.varyings_count = etnaviv_field(specs[2],
178 VIVS_HI_CHIP_SPECS_3_VARYINGS_COUNT);
179
180 /* This overrides the value from older register if non-zero */
181 streams = etnaviv_field(specs[3],
182 VIVS_HI_CHIP_SPECS_4_STREAM_COUNT);
183 if (streams)
184 gpu->identity.stream_count = streams;
185 }
186
187 /* Fill in the stream count if not specified */
188 if (gpu->identity.stream_count == 0) {
189 if (gpu->identity.model >= 0x1000)
190 gpu->identity.stream_count = 4;
191 else
192 gpu->identity.stream_count = 1;
193 }
194
195 /* Convert the register max value */
196 if (gpu->identity.register_max)
197 gpu->identity.register_max = 1 << gpu->identity.register_max;
198 else if (gpu->identity.model == chipModel_GC400)
199 gpu->identity.register_max = 32;
200 else
201 gpu->identity.register_max = 64;
202
203 /* Convert thread count */
204 if (gpu->identity.thread_count)
205 gpu->identity.thread_count = 1 << gpu->identity.thread_count;
206 else if (gpu->identity.model == chipModel_GC400)
207 gpu->identity.thread_count = 64;
208 else if (gpu->identity.model == chipModel_GC500 ||
209 gpu->identity.model == chipModel_GC530)
210 gpu->identity.thread_count = 128;
211 else
212 gpu->identity.thread_count = 256;
213
214 if (gpu->identity.vertex_cache_size == 0)
215 gpu->identity.vertex_cache_size = 8;
216
217 if (gpu->identity.shader_core_count == 0) {
218 if (gpu->identity.model >= 0x1000)
219 gpu->identity.shader_core_count = 2;
220 else
221 gpu->identity.shader_core_count = 1;
222 }
223
224 if (gpu->identity.pixel_pipes == 0)
225 gpu->identity.pixel_pipes = 1;
226
227 /* Convert virtex buffer size */
228 if (gpu->identity.vertex_output_buffer_size) {
229 gpu->identity.vertex_output_buffer_size =
230 1 << gpu->identity.vertex_output_buffer_size;
231 } else if (gpu->identity.model == chipModel_GC400) {
232 if (gpu->identity.revision < 0x4000)
233 gpu->identity.vertex_output_buffer_size = 512;
234 else if (gpu->identity.revision < 0x4200)
235 gpu->identity.vertex_output_buffer_size = 256;
236 else
237 gpu->identity.vertex_output_buffer_size = 128;
238 } else {
239 gpu->identity.vertex_output_buffer_size = 512;
240 }
241
242 switch (gpu->identity.instruction_count) {
243 case 0:
244 if (etnaviv_is_model_rev(gpu, GC2000, 0x5108) ||
245 gpu->identity.model == chipModel_GC880)
246 gpu->identity.instruction_count = 512;
247 else
248 gpu->identity.instruction_count = 256;
249 break;
250
251 case 1:
252 gpu->identity.instruction_count = 1024;
253 break;
254
255 case 2:
256 gpu->identity.instruction_count = 2048;
257 break;
258
259 default:
260 gpu->identity.instruction_count = 256;
261 break;
262 }
263
264 if (gpu->identity.num_constants == 0)
265 gpu->identity.num_constants = 168;
266
267 if (gpu->identity.varyings_count == 0) {
268 if (gpu->identity.minor_features1 & chipMinorFeatures1_HALTI0)
269 gpu->identity.varyings_count = 12;
270 else
271 gpu->identity.varyings_count = 8;
272 }
273
274 /*
275 * For some cores, two varyings are consumed for position, so the
276 * maximum varying count needs to be reduced by one.
277 */
278 if (etnaviv_is_model_rev(gpu, GC5000, 0x5434) ||
279 etnaviv_is_model_rev(gpu, GC4000, 0x5222) ||
280 etnaviv_is_model_rev(gpu, GC4000, 0x5245) ||
281 etnaviv_is_model_rev(gpu, GC4000, 0x5208) ||
282 etnaviv_is_model_rev(gpu, GC3000, 0x5435) ||
283 etnaviv_is_model_rev(gpu, GC2200, 0x5244) ||
284 etnaviv_is_model_rev(gpu, GC2100, 0x5108) ||
285 etnaviv_is_model_rev(gpu, GC2000, 0x5108) ||
286 etnaviv_is_model_rev(gpu, GC1500, 0x5246) ||
287 etnaviv_is_model_rev(gpu, GC880, 0x5107) ||
288 etnaviv_is_model_rev(gpu, GC880, 0x5106))
289 gpu->identity.varyings_count -= 1;
290 }
291
292 static void etnaviv_hw_identify(struct etnaviv_gpu *gpu)
293 {
294 u32 chipIdentity;
295
296 chipIdentity = gpu_read(gpu, VIVS_HI_CHIP_IDENTITY);
297
298 /* Special case for older graphic cores. */
299 if (etnaviv_field(chipIdentity, VIVS_HI_CHIP_IDENTITY_FAMILY) == 0x01) {
300 gpu->identity.model = chipModel_GC500;
301 gpu->identity.revision = etnaviv_field(chipIdentity,
302 VIVS_HI_CHIP_IDENTITY_REVISION);
303 } else {
304
305 gpu->identity.model = gpu_read(gpu, VIVS_HI_CHIP_MODEL);
306 gpu->identity.revision = gpu_read(gpu, VIVS_HI_CHIP_REV);
307
308 /*
309 * !!!! HACK ALERT !!!!
310 * Because people change device IDs without letting software
311 * know about it - here is the hack to make it all look the
312 * same. Only for GC400 family.
313 */
314 if ((gpu->identity.model & 0xff00) == 0x0400 &&
315 gpu->identity.model != chipModel_GC420) {
316 gpu->identity.model = gpu->identity.model & 0x0400;
317 }
318
319 /* Another special case */
320 if (etnaviv_is_model_rev(gpu, GC300, 0x2201)) {
321 u32 chipDate = gpu_read(gpu, VIVS_HI_CHIP_DATE);
322 u32 chipTime = gpu_read(gpu, VIVS_HI_CHIP_TIME);
323
324 if (chipDate == 0x20080814 && chipTime == 0x12051100) {
325 /*
326 * This IP has an ECO; put the correct
327 * revision in it.
328 */
329 gpu->identity.revision = 0x1051;
330 }
331 }
332
333 /*
334 * NXP likes to call the GPU on the i.MX6QP GC2000+, but in
335 * reality it's just a re-branded GC3000. We can identify this
336 * core by the upper half of the revision register being all 1.
337 * Fix model/rev here, so all other places can refer to this
338 * core by its real identity.
339 */
340 if (etnaviv_is_model_rev(gpu, GC2000, 0xffff5450)) {
341 gpu->identity.model = chipModel_GC3000;
342 gpu->identity.revision &= 0xffff;
343 }
344 }
345
346 dev_info(gpu->dev, "model: GC%x, revision: %x\n",
347 gpu->identity.model, gpu->identity.revision);
348
349 gpu->identity.features = gpu_read(gpu, VIVS_HI_CHIP_FEATURE);
350
351 /* Disable fast clear on GC700. */
352 if (gpu->identity.model == chipModel_GC700)
353 gpu->identity.features &= ~chipFeatures_FAST_CLEAR;
354
355 if ((gpu->identity.model == chipModel_GC500 &&
356 gpu->identity.revision < 2) ||
357 (gpu->identity.model == chipModel_GC300 &&
358 gpu->identity.revision < 0x2000)) {
359
360 /*
361 * GC500 rev 1.x and GC300 rev < 2.0 doesn't have these
362 * registers.
363 */
364 gpu->identity.minor_features0 = 0;
365 gpu->identity.minor_features1 = 0;
366 gpu->identity.minor_features2 = 0;
367 gpu->identity.minor_features3 = 0;
368 gpu->identity.minor_features4 = 0;
369 gpu->identity.minor_features5 = 0;
370 } else
371 gpu->identity.minor_features0 =
372 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_0);
373
374 if (gpu->identity.minor_features0 &
375 chipMinorFeatures0_MORE_MINOR_FEATURES) {
376 gpu->identity.minor_features1 =
377 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_1);
378 gpu->identity.minor_features2 =
379 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_2);
380 gpu->identity.minor_features3 =
381 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_3);
382 gpu->identity.minor_features4 =
383 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_4);
384 gpu->identity.minor_features5 =
385 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_5);
386 }
387
388 /* GC600 idle register reports zero bits where modules aren't present */
389 if (gpu->identity.model == chipModel_GC600) {
390 gpu->idle_mask = VIVS_HI_IDLE_STATE_TX |
391 VIVS_HI_IDLE_STATE_RA |
392 VIVS_HI_IDLE_STATE_SE |
393 VIVS_HI_IDLE_STATE_PA |
394 VIVS_HI_IDLE_STATE_SH |
395 VIVS_HI_IDLE_STATE_PE |
396 VIVS_HI_IDLE_STATE_DE |
397 VIVS_HI_IDLE_STATE_FE;
398 } else {
399 gpu->idle_mask = ~VIVS_HI_IDLE_STATE_AXI_LP;
400 }
401
402 etnaviv_hw_specs(gpu);
403 }
404
405 static void etnaviv_gpu_load_clock(struct etnaviv_gpu *gpu, u32 clock)
406 {
407 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, clock |
408 VIVS_HI_CLOCK_CONTROL_FSCALE_CMD_LOAD);
409 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, clock);
410 }
411
412 static int etnaviv_hw_reset(struct etnaviv_gpu *gpu)
413 {
414 u32 control, idle;
415 unsigned long timeout;
416 bool failed = true;
417
418 /* TODO
419 *
420 * - clock gating
421 * - puls eater
422 * - what about VG?
423 */
424
425 /* We hope that the GPU resets in under one second */
426 timeout = jiffies + msecs_to_jiffies(1000);
427
428 while (time_is_after_jiffies(timeout)) {
429 control = VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS |
430 VIVS_HI_CLOCK_CONTROL_FSCALE_VAL(0x40);
431
432 /* enable clock */
433 etnaviv_gpu_load_clock(gpu, control);
434
435 /* Wait for stable clock. Vivante's code waited for 1ms */
436 usleep_range(1000, 10000);
437
438 /* isolate the GPU. */
439 control |= VIVS_HI_CLOCK_CONTROL_ISOLATE_GPU;
440 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control);
441
442 /* set soft reset. */
443 control |= VIVS_HI_CLOCK_CONTROL_SOFT_RESET;
444 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control);
445
446 /* wait for reset. */
447 msleep(1);
448
449 /* reset soft reset bit. */
450 control &= ~VIVS_HI_CLOCK_CONTROL_SOFT_RESET;
451 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control);
452
453 /* reset GPU isolation. */
454 control &= ~VIVS_HI_CLOCK_CONTROL_ISOLATE_GPU;
455 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control);
456
457 /* read idle register. */
458 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE);
459
460 /* try reseting again if FE it not idle */
461 if ((idle & VIVS_HI_IDLE_STATE_FE) == 0) {
462 dev_dbg(gpu->dev, "FE is not idle\n");
463 continue;
464 }
465
466 /* read reset register. */
467 control = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL);
468
469 /* is the GPU idle? */
470 if (((control & VIVS_HI_CLOCK_CONTROL_IDLE_3D) == 0) ||
471 ((control & VIVS_HI_CLOCK_CONTROL_IDLE_2D) == 0)) {
472 dev_dbg(gpu->dev, "GPU is not idle\n");
473 continue;
474 }
475
476 failed = false;
477 break;
478 }
479
480 if (failed) {
481 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE);
482 control = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL);
483
484 dev_err(gpu->dev, "GPU failed to reset: FE %sidle, 3D %sidle, 2D %sidle\n",
485 idle & VIVS_HI_IDLE_STATE_FE ? "" : "not ",
486 control & VIVS_HI_CLOCK_CONTROL_IDLE_3D ? "" : "not ",
487 control & VIVS_HI_CLOCK_CONTROL_IDLE_2D ? "" : "not ");
488
489 return -EBUSY;
490 }
491
492 /* We rely on the GPU running, so program the clock */
493 control = VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS |
494 VIVS_HI_CLOCK_CONTROL_FSCALE_VAL(0x40);
495
496 /* enable clock */
497 etnaviv_gpu_load_clock(gpu, control);
498
499 return 0;
500 }
501
502 static void etnaviv_gpu_enable_mlcg(struct etnaviv_gpu *gpu)
503 {
504 u32 pmc, ppc;
505
506 /* enable clock gating */
507 ppc = gpu_read(gpu, VIVS_PM_POWER_CONTROLS);
508 ppc |= VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING;
509
510 /* Disable stall module clock gating for 4.3.0.1 and 4.3.0.2 revs */
511 if (gpu->identity.revision == 0x4301 ||
512 gpu->identity.revision == 0x4302)
513 ppc |= VIVS_PM_POWER_CONTROLS_DISABLE_STALL_MODULE_CLOCK_GATING;
514
515 gpu_write(gpu, VIVS_PM_POWER_CONTROLS, ppc);
516
517 pmc = gpu_read(gpu, VIVS_PM_MODULE_CONTROLS);
518
519 /* Disable PA clock gating for GC400+ except for GC420 */
520 if (gpu->identity.model >= chipModel_GC400 &&
521 gpu->identity.model != chipModel_GC420)
522 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PA;
523
524 /*
525 * Disable PE clock gating on revs < 5.0.0.0 when HZ is
526 * present without a bug fix.
527 */
528 if (gpu->identity.revision < 0x5000 &&
529 gpu->identity.minor_features0 & chipMinorFeatures0_HZ &&
530 !(gpu->identity.minor_features1 &
531 chipMinorFeatures1_DISABLE_PE_GATING))
532 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PE;
533
534 if (gpu->identity.revision < 0x5422)
535 pmc |= BIT(15); /* Unknown bit */
536
537 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_HZ;
538 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_EZ;
539
540 gpu_write(gpu, VIVS_PM_MODULE_CONTROLS, pmc);
541 }
542
543 void etnaviv_gpu_start_fe(struct etnaviv_gpu *gpu, u32 address, u16 prefetch)
544 {
545 gpu_write(gpu, VIVS_FE_COMMAND_ADDRESS, address);
546 gpu_write(gpu, VIVS_FE_COMMAND_CONTROL,
547 VIVS_FE_COMMAND_CONTROL_ENABLE |
548 VIVS_FE_COMMAND_CONTROL_PREFETCH(prefetch));
549 }
550
551 static void etnaviv_gpu_setup_pulse_eater(struct etnaviv_gpu *gpu)
552 {
553 /*
554 * Base value for VIVS_PM_PULSE_EATER register on models where it
555 * cannot be read, extracted from vivante kernel driver.
556 */
557 u32 pulse_eater = 0x01590880;
558
559 if (etnaviv_is_model_rev(gpu, GC4000, 0x5208) ||
560 etnaviv_is_model_rev(gpu, GC4000, 0x5222)) {
561 pulse_eater |= BIT(23);
562
563 }
564
565 if (etnaviv_is_model_rev(gpu, GC1000, 0x5039) ||
566 etnaviv_is_model_rev(gpu, GC1000, 0x5040)) {
567 pulse_eater &= ~BIT(16);
568 pulse_eater |= BIT(17);
569 }
570
571 if ((gpu->identity.revision > 0x5420) &&
572 (gpu->identity.features & chipFeatures_PIPE_3D))
573 {
574 /* Performance fix: disable internal DFS */
575 pulse_eater = gpu_read(gpu, VIVS_PM_PULSE_EATER);
576 pulse_eater |= BIT(18);
577 }
578
579 gpu_write(gpu, VIVS_PM_PULSE_EATER, pulse_eater);
580 }
581
582 static void etnaviv_gpu_hw_init(struct etnaviv_gpu *gpu)
583 {
584 u16 prefetch;
585
586 if ((etnaviv_is_model_rev(gpu, GC320, 0x5007) ||
587 etnaviv_is_model_rev(gpu, GC320, 0x5220)) &&
588 gpu_read(gpu, VIVS_HI_CHIP_TIME) != 0x2062400) {
589 u32 mc_memory_debug;
590
591 mc_memory_debug = gpu_read(gpu, VIVS_MC_DEBUG_MEMORY) & ~0xff;
592
593 if (gpu->identity.revision == 0x5007)
594 mc_memory_debug |= 0x0c;
595 else
596 mc_memory_debug |= 0x08;
597
598 gpu_write(gpu, VIVS_MC_DEBUG_MEMORY, mc_memory_debug);
599 }
600
601 /* enable module-level clock gating */
602 etnaviv_gpu_enable_mlcg(gpu);
603
604 /*
605 * Update GPU AXI cache atttribute to "cacheable, no allocate".
606 * This is necessary to prevent the iMX6 SoC locking up.
607 */
608 gpu_write(gpu, VIVS_HI_AXI_CONFIG,
609 VIVS_HI_AXI_CONFIG_AWCACHE(2) |
610 VIVS_HI_AXI_CONFIG_ARCACHE(2));
611
612 /* GC2000 rev 5108 needs a special bus config */
613 if (etnaviv_is_model_rev(gpu, GC2000, 0x5108)) {
614 u32 bus_config = gpu_read(gpu, VIVS_MC_BUS_CONFIG);
615 bus_config &= ~(VIVS_MC_BUS_CONFIG_FE_BUS_CONFIG__MASK |
616 VIVS_MC_BUS_CONFIG_TX_BUS_CONFIG__MASK);
617 bus_config |= VIVS_MC_BUS_CONFIG_FE_BUS_CONFIG(1) |
618 VIVS_MC_BUS_CONFIG_TX_BUS_CONFIG(0);
619 gpu_write(gpu, VIVS_MC_BUS_CONFIG, bus_config);
620 }
621
622 /* setup the pulse eater */
623 etnaviv_gpu_setup_pulse_eater(gpu);
624
625 /* setup the MMU */
626 etnaviv_iommu_restore(gpu);
627
628 /* Start command processor */
629 prefetch = etnaviv_buffer_init(gpu);
630
631 gpu_write(gpu, VIVS_HI_INTR_ENBL, ~0U);
632 etnaviv_gpu_start_fe(gpu, etnaviv_cmdbuf_get_va(gpu->buffer),
633 prefetch);
634 }
635
636 int etnaviv_gpu_init(struct etnaviv_gpu *gpu)
637 {
638 int ret, i;
639
640 ret = pm_runtime_get_sync(gpu->dev);
641 if (ret < 0) {
642 dev_err(gpu->dev, "Failed to enable GPU power domain\n");
643 return ret;
644 }
645
646 etnaviv_hw_identify(gpu);
647
648 if (gpu->identity.model == 0) {
649 dev_err(gpu->dev, "Unknown GPU model\n");
650 ret = -ENXIO;
651 goto fail;
652 }
653
654 /* Exclude VG cores with FE2.0 */
655 if (gpu->identity.features & chipFeatures_PIPE_VG &&
656 gpu->identity.features & chipFeatures_FE20) {
657 dev_info(gpu->dev, "Ignoring GPU with VG and FE2.0\n");
658 ret = -ENXIO;
659 goto fail;
660 }
661
662 /*
663 * Set the GPU linear window to be at the end of the DMA window, where
664 * the CMA area is likely to reside. This ensures that we are able to
665 * map the command buffers while having the linear window overlap as
666 * much RAM as possible, so we can optimize mappings for other buffers.
667 *
668 * For 3D cores only do this if MC2.0 is present, as with MC1.0 it leads
669 * to different views of the memory on the individual engines.
670 */
671 if (!(gpu->identity.features & chipFeatures_PIPE_3D) ||
672 (gpu->identity.minor_features0 & chipMinorFeatures0_MC20)) {
673 u32 dma_mask = (u32)dma_get_required_mask(gpu->dev);
674 if (dma_mask < PHYS_OFFSET + SZ_2G)
675 gpu->memory_base = PHYS_OFFSET;
676 else
677 gpu->memory_base = dma_mask - SZ_2G + 1;
678 } else if (PHYS_OFFSET >= SZ_2G) {
679 dev_info(gpu->dev, "Need to move linear window on MC1.0, disabling TS\n");
680 gpu->memory_base = PHYS_OFFSET;
681 gpu->identity.features &= ~chipFeatures_FAST_CLEAR;
682 }
683
684 ret = etnaviv_hw_reset(gpu);
685 if (ret) {
686 dev_err(gpu->dev, "GPU reset failed\n");
687 goto fail;
688 }
689
690 gpu->mmu = etnaviv_iommu_new(gpu);
691 if (IS_ERR(gpu->mmu)) {
692 dev_err(gpu->dev, "Failed to instantiate GPU IOMMU\n");
693 ret = PTR_ERR(gpu->mmu);
694 goto fail;
695 }
696
697 gpu->cmdbuf_suballoc = etnaviv_cmdbuf_suballoc_new(gpu);
698 if (IS_ERR(gpu->cmdbuf_suballoc)) {
699 dev_err(gpu->dev, "Failed to create cmdbuf suballocator\n");
700 ret = PTR_ERR(gpu->cmdbuf_suballoc);
701 goto fail;
702 }
703
704 /* Create buffer: */
705 gpu->buffer = etnaviv_cmdbuf_new(gpu->cmdbuf_suballoc, PAGE_SIZE, 0);
706 if (!gpu->buffer) {
707 ret = -ENOMEM;
708 dev_err(gpu->dev, "could not create command buffer\n");
709 goto destroy_iommu;
710 }
711
712 if (gpu->mmu->version == ETNAVIV_IOMMU_V1 &&
713 etnaviv_cmdbuf_get_va(gpu->buffer) > 0x80000000) {
714 ret = -EINVAL;
715 dev_err(gpu->dev,
716 "command buffer outside valid memory window\n");
717 goto free_buffer;
718 }
719
720 /* Setup event management */
721 spin_lock_init(&gpu->event_spinlock);
722 init_completion(&gpu->event_free);
723 for (i = 0; i < ARRAY_SIZE(gpu->event); i++) {
724 gpu->event[i].used = false;
725 complete(&gpu->event_free);
726 }
727
728 /* Now program the hardware */
729 mutex_lock(&gpu->lock);
730 etnaviv_gpu_hw_init(gpu);
731 gpu->exec_state = -1;
732 mutex_unlock(&gpu->lock);
733
734 pm_runtime_mark_last_busy(gpu->dev);
735 pm_runtime_put_autosuspend(gpu->dev);
736
737 return 0;
738
739 free_buffer:
740 etnaviv_cmdbuf_free(gpu->buffer);
741 gpu->buffer = NULL;
742 destroy_iommu:
743 etnaviv_iommu_destroy(gpu->mmu);
744 gpu->mmu = NULL;
745 fail:
746 pm_runtime_mark_last_busy(gpu->dev);
747 pm_runtime_put_autosuspend(gpu->dev);
748
749 return ret;
750 }
751
752 #ifdef CONFIG_DEBUG_FS
753 struct dma_debug {
754 u32 address[2];
755 u32 state[2];
756 };
757
758 static void verify_dma(struct etnaviv_gpu *gpu, struct dma_debug *debug)
759 {
760 u32 i;
761
762 debug->address[0] = gpu_read(gpu, VIVS_FE_DMA_ADDRESS);
763 debug->state[0] = gpu_read(gpu, VIVS_FE_DMA_DEBUG_STATE);
764
765 for (i = 0; i < 500; i++) {
766 debug->address[1] = gpu_read(gpu, VIVS_FE_DMA_ADDRESS);
767 debug->state[1] = gpu_read(gpu, VIVS_FE_DMA_DEBUG_STATE);
768
769 if (debug->address[0] != debug->address[1])
770 break;
771
772 if (debug->state[0] != debug->state[1])
773 break;
774 }
775 }
776
777 int etnaviv_gpu_debugfs(struct etnaviv_gpu *gpu, struct seq_file *m)
778 {
779 struct dma_debug debug;
780 u32 dma_lo, dma_hi, axi, idle;
781 int ret;
782
783 seq_printf(m, "%s Status:\n", dev_name(gpu->dev));
784
785 ret = pm_runtime_get_sync(gpu->dev);
786 if (ret < 0)
787 return ret;
788
789 dma_lo = gpu_read(gpu, VIVS_FE_DMA_LOW);
790 dma_hi = gpu_read(gpu, VIVS_FE_DMA_HIGH);
791 axi = gpu_read(gpu, VIVS_HI_AXI_STATUS);
792 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE);
793
794 verify_dma(gpu, &debug);
795
796 seq_puts(m, "\tfeatures\n");
797 seq_printf(m, "\t minor_features0: 0x%08x\n",
798 gpu->identity.minor_features0);
799 seq_printf(m, "\t minor_features1: 0x%08x\n",
800 gpu->identity.minor_features1);
801 seq_printf(m, "\t minor_features2: 0x%08x\n",
802 gpu->identity.minor_features2);
803 seq_printf(m, "\t minor_features3: 0x%08x\n",
804 gpu->identity.minor_features3);
805 seq_printf(m, "\t minor_features4: 0x%08x\n",
806 gpu->identity.minor_features4);
807 seq_printf(m, "\t minor_features5: 0x%08x\n",
808 gpu->identity.minor_features5);
809
810 seq_puts(m, "\tspecs\n");
811 seq_printf(m, "\t stream_count: %d\n",
812 gpu->identity.stream_count);
813 seq_printf(m, "\t register_max: %d\n",
814 gpu->identity.register_max);
815 seq_printf(m, "\t thread_count: %d\n",
816 gpu->identity.thread_count);
817 seq_printf(m, "\t vertex_cache_size: %d\n",
818 gpu->identity.vertex_cache_size);
819 seq_printf(m, "\t shader_core_count: %d\n",
820 gpu->identity.shader_core_count);
821 seq_printf(m, "\t pixel_pipes: %d\n",
822 gpu->identity.pixel_pipes);
823 seq_printf(m, "\t vertex_output_buffer_size: %d\n",
824 gpu->identity.vertex_output_buffer_size);
825 seq_printf(m, "\t buffer_size: %d\n",
826 gpu->identity.buffer_size);
827 seq_printf(m, "\t instruction_count: %d\n",
828 gpu->identity.instruction_count);
829 seq_printf(m, "\t num_constants: %d\n",
830 gpu->identity.num_constants);
831 seq_printf(m, "\t varyings_count: %d\n",
832 gpu->identity.varyings_count);
833
834 seq_printf(m, "\taxi: 0x%08x\n", axi);
835 seq_printf(m, "\tidle: 0x%08x\n", idle);
836 idle |= ~gpu->idle_mask & ~VIVS_HI_IDLE_STATE_AXI_LP;
837 if ((idle & VIVS_HI_IDLE_STATE_FE) == 0)
838 seq_puts(m, "\t FE is not idle\n");
839 if ((idle & VIVS_HI_IDLE_STATE_DE) == 0)
840 seq_puts(m, "\t DE is not idle\n");
841 if ((idle & VIVS_HI_IDLE_STATE_PE) == 0)
842 seq_puts(m, "\t PE is not idle\n");
843 if ((idle & VIVS_HI_IDLE_STATE_SH) == 0)
844 seq_puts(m, "\t SH is not idle\n");
845 if ((idle & VIVS_HI_IDLE_STATE_PA) == 0)
846 seq_puts(m, "\t PA is not idle\n");
847 if ((idle & VIVS_HI_IDLE_STATE_SE) == 0)
848 seq_puts(m, "\t SE is not idle\n");
849 if ((idle & VIVS_HI_IDLE_STATE_RA) == 0)
850 seq_puts(m, "\t RA is not idle\n");
851 if ((idle & VIVS_HI_IDLE_STATE_TX) == 0)
852 seq_puts(m, "\t TX is not idle\n");
853 if ((idle & VIVS_HI_IDLE_STATE_VG) == 0)
854 seq_puts(m, "\t VG is not idle\n");
855 if ((idle & VIVS_HI_IDLE_STATE_IM) == 0)
856 seq_puts(m, "\t IM is not idle\n");
857 if ((idle & VIVS_HI_IDLE_STATE_FP) == 0)
858 seq_puts(m, "\t FP is not idle\n");
859 if ((idle & VIVS_HI_IDLE_STATE_TS) == 0)
860 seq_puts(m, "\t TS is not idle\n");
861 if (idle & VIVS_HI_IDLE_STATE_AXI_LP)
862 seq_puts(m, "\t AXI low power mode\n");
863
864 if (gpu->identity.features & chipFeatures_DEBUG_MODE) {
865 u32 read0 = gpu_read(gpu, VIVS_MC_DEBUG_READ0);
866 u32 read1 = gpu_read(gpu, VIVS_MC_DEBUG_READ1);
867 u32 write = gpu_read(gpu, VIVS_MC_DEBUG_WRITE);
868
869 seq_puts(m, "\tMC\n");
870 seq_printf(m, "\t read0: 0x%08x\n", read0);
871 seq_printf(m, "\t read1: 0x%08x\n", read1);
872 seq_printf(m, "\t write: 0x%08x\n", write);
873 }
874
875 seq_puts(m, "\tDMA ");
876
877 if (debug.address[0] == debug.address[1] &&
878 debug.state[0] == debug.state[1]) {
879 seq_puts(m, "seems to be stuck\n");
880 } else if (debug.address[0] == debug.address[1]) {
881 seq_puts(m, "address is constant\n");
882 } else {
883 seq_puts(m, "is running\n");
884 }
885
886 seq_printf(m, "\t address 0: 0x%08x\n", debug.address[0]);
887 seq_printf(m, "\t address 1: 0x%08x\n", debug.address[1]);
888 seq_printf(m, "\t state 0: 0x%08x\n", debug.state[0]);
889 seq_printf(m, "\t state 1: 0x%08x\n", debug.state[1]);
890 seq_printf(m, "\t last fetch 64 bit word: 0x%08x 0x%08x\n",
891 dma_lo, dma_hi);
892
893 ret = 0;
894
895 pm_runtime_mark_last_busy(gpu->dev);
896 pm_runtime_put_autosuspend(gpu->dev);
897
898 return ret;
899 }
900 #endif
901
902 /*
903 * Hangcheck detection for locked gpu:
904 */
905 static void recover_worker(struct work_struct *work)
906 {
907 struct etnaviv_gpu *gpu = container_of(work, struct etnaviv_gpu,
908 recover_work);
909 unsigned long flags;
910 unsigned int i;
911
912 dev_err(gpu->dev, "hangcheck recover!\n");
913
914 if (pm_runtime_get_sync(gpu->dev) < 0)
915 return;
916
917 mutex_lock(&gpu->lock);
918
919 /* Only catch the first event, or when manually re-armed */
920 if (etnaviv_dump_core) {
921 etnaviv_core_dump(gpu);
922 etnaviv_dump_core = false;
923 }
924
925 etnaviv_hw_reset(gpu);
926
927 /* complete all events, the GPU won't do it after the reset */
928 spin_lock_irqsave(&gpu->event_spinlock, flags);
929 for (i = 0; i < ARRAY_SIZE(gpu->event); i++) {
930 if (!gpu->event[i].used)
931 continue;
932 dma_fence_signal(gpu->event[i].fence);
933 gpu->event[i].fence = NULL;
934 gpu->event[i].used = false;
935 complete(&gpu->event_free);
936 }
937 spin_unlock_irqrestore(&gpu->event_spinlock, flags);
938 gpu->completed_fence = gpu->active_fence;
939
940 etnaviv_gpu_hw_init(gpu);
941 gpu->lastctx = NULL;
942 gpu->exec_state = -1;
943
944 mutex_unlock(&gpu->lock);
945 pm_runtime_mark_last_busy(gpu->dev);
946 pm_runtime_put_autosuspend(gpu->dev);
947
948 /* Retire the buffer objects in a work */
949 etnaviv_queue_work(gpu->drm, &gpu->retire_work);
950 }
951
952 static void hangcheck_timer_reset(struct etnaviv_gpu *gpu)
953 {
954 DBG("%s", dev_name(gpu->dev));
955 mod_timer(&gpu->hangcheck_timer,
956 round_jiffies_up(jiffies + DRM_ETNAVIV_HANGCHECK_JIFFIES));
957 }
958
959 static void hangcheck_handler(unsigned long data)
960 {
961 struct etnaviv_gpu *gpu = (struct etnaviv_gpu *)data;
962 u32 fence = gpu->completed_fence;
963 bool progress = false;
964
965 if (fence != gpu->hangcheck_fence) {
966 gpu->hangcheck_fence = fence;
967 progress = true;
968 }
969
970 if (!progress) {
971 u32 dma_addr = gpu_read(gpu, VIVS_FE_DMA_ADDRESS);
972 int change = dma_addr - gpu->hangcheck_dma_addr;
973
974 if (change < 0 || change > 16) {
975 gpu->hangcheck_dma_addr = dma_addr;
976 progress = true;
977 }
978 }
979
980 if (!progress && fence_after(gpu->active_fence, fence)) {
981 dev_err(gpu->dev, "hangcheck detected gpu lockup!\n");
982 dev_err(gpu->dev, " completed fence: %u\n", fence);
983 dev_err(gpu->dev, " active fence: %u\n",
984 gpu->active_fence);
985 etnaviv_queue_work(gpu->drm, &gpu->recover_work);
986 }
987
988 /* if still more pending work, reset the hangcheck timer: */
989 if (fence_after(gpu->active_fence, gpu->hangcheck_fence))
990 hangcheck_timer_reset(gpu);
991 }
992
993 static void hangcheck_disable(struct etnaviv_gpu *gpu)
994 {
995 del_timer_sync(&gpu->hangcheck_timer);
996 cancel_work_sync(&gpu->recover_work);
997 }
998
999 /* fence object management */
1000 struct etnaviv_fence {
1001 struct etnaviv_gpu *gpu;
1002 struct dma_fence base;
1003 };
1004
1005 static inline struct etnaviv_fence *to_etnaviv_fence(struct dma_fence *fence)
1006 {
1007 return container_of(fence, struct etnaviv_fence, base);
1008 }
1009
1010 static const char *etnaviv_fence_get_driver_name(struct dma_fence *fence)
1011 {
1012 return "etnaviv";
1013 }
1014
1015 static const char *etnaviv_fence_get_timeline_name(struct dma_fence *fence)
1016 {
1017 struct etnaviv_fence *f = to_etnaviv_fence(fence);
1018
1019 return dev_name(f->gpu->dev);
1020 }
1021
1022 static bool etnaviv_fence_enable_signaling(struct dma_fence *fence)
1023 {
1024 return true;
1025 }
1026
1027 static bool etnaviv_fence_signaled(struct dma_fence *fence)
1028 {
1029 struct etnaviv_fence *f = to_etnaviv_fence(fence);
1030
1031 return fence_completed(f->gpu, f->base.seqno);
1032 }
1033
1034 static void etnaviv_fence_release(struct dma_fence *fence)
1035 {
1036 struct etnaviv_fence *f = to_etnaviv_fence(fence);
1037
1038 kfree_rcu(f, base.rcu);
1039 }
1040
1041 static const struct dma_fence_ops etnaviv_fence_ops = {
1042 .get_driver_name = etnaviv_fence_get_driver_name,
1043 .get_timeline_name = etnaviv_fence_get_timeline_name,
1044 .enable_signaling = etnaviv_fence_enable_signaling,
1045 .signaled = etnaviv_fence_signaled,
1046 .wait = dma_fence_default_wait,
1047 .release = etnaviv_fence_release,
1048 };
1049
1050 static struct dma_fence *etnaviv_gpu_fence_alloc(struct etnaviv_gpu *gpu)
1051 {
1052 struct etnaviv_fence *f;
1053
1054 f = kzalloc(sizeof(*f), GFP_KERNEL);
1055 if (!f)
1056 return NULL;
1057
1058 f->gpu = gpu;
1059
1060 dma_fence_init(&f->base, &etnaviv_fence_ops, &gpu->fence_spinlock,
1061 gpu->fence_context, ++gpu->next_fence);
1062
1063 return &f->base;
1064 }
1065
1066 int etnaviv_gpu_fence_sync_obj(struct etnaviv_gem_object *etnaviv_obj,
1067 unsigned int context, bool exclusive)
1068 {
1069 struct reservation_object *robj = etnaviv_obj->resv;
1070 struct reservation_object_list *fobj;
1071 struct dma_fence *fence;
1072 int i, ret;
1073
1074 if (!exclusive) {
1075 ret = reservation_object_reserve_shared(robj);
1076 if (ret)
1077 return ret;
1078 }
1079
1080 /*
1081 * If we have any shared fences, then the exclusive fence
1082 * should be ignored as it will already have been signalled.
1083 */
1084 fobj = reservation_object_get_list(robj);
1085 if (!fobj || fobj->shared_count == 0) {
1086 /* Wait on any existing exclusive fence which isn't our own */
1087 fence = reservation_object_get_excl(robj);
1088 if (fence && fence->context != context) {
1089 ret = dma_fence_wait(fence, true);
1090 if (ret)
1091 return ret;
1092 }
1093 }
1094
1095 if (!exclusive || !fobj)
1096 return 0;
1097
1098 for (i = 0; i < fobj->shared_count; i++) {
1099 fence = rcu_dereference_protected(fobj->shared[i],
1100 reservation_object_held(robj));
1101 if (fence->context != context) {
1102 ret = dma_fence_wait(fence, true);
1103 if (ret)
1104 return ret;
1105 }
1106 }
1107
1108 return 0;
1109 }
1110
1111 /*
1112 * event management:
1113 */
1114
1115 static unsigned int event_alloc(struct etnaviv_gpu *gpu)
1116 {
1117 unsigned long ret, flags;
1118 unsigned int i, event = ~0U;
1119
1120 ret = wait_for_completion_timeout(&gpu->event_free,
1121 msecs_to_jiffies(10 * 10000));
1122 if (!ret)
1123 dev_err(gpu->dev, "wait_for_completion_timeout failed");
1124
1125 spin_lock_irqsave(&gpu->event_spinlock, flags);
1126
1127 /* find first free event */
1128 for (i = 0; i < ARRAY_SIZE(gpu->event); i++) {
1129 if (gpu->event[i].used == false) {
1130 gpu->event[i].used = true;
1131 event = i;
1132 break;
1133 }
1134 }
1135
1136 spin_unlock_irqrestore(&gpu->event_spinlock, flags);
1137
1138 return event;
1139 }
1140
1141 static void event_free(struct etnaviv_gpu *gpu, unsigned int event)
1142 {
1143 unsigned long flags;
1144
1145 spin_lock_irqsave(&gpu->event_spinlock, flags);
1146
1147 if (gpu->event[event].used == false) {
1148 dev_warn(gpu->dev, "event %u is already marked as free",
1149 event);
1150 spin_unlock_irqrestore(&gpu->event_spinlock, flags);
1151 } else {
1152 gpu->event[event].used = false;
1153 spin_unlock_irqrestore(&gpu->event_spinlock, flags);
1154
1155 complete(&gpu->event_free);
1156 }
1157 }
1158
1159 /*
1160 * Cmdstream submission/retirement:
1161 */
1162
1163 static void retire_worker(struct work_struct *work)
1164 {
1165 struct etnaviv_gpu *gpu = container_of(work, struct etnaviv_gpu,
1166 retire_work);
1167 u32 fence = gpu->completed_fence;
1168 struct etnaviv_cmdbuf *cmdbuf, *tmp;
1169 unsigned int i;
1170
1171 mutex_lock(&gpu->lock);
1172 list_for_each_entry_safe(cmdbuf, tmp, &gpu->active_cmd_list, node) {
1173 if (!dma_fence_is_signaled(cmdbuf->fence))
1174 break;
1175
1176 list_del(&cmdbuf->node);
1177 dma_fence_put(cmdbuf->fence);
1178
1179 for (i = 0; i < cmdbuf->nr_bos; i++) {
1180 struct etnaviv_vram_mapping *mapping = cmdbuf->bo_map[i];
1181 struct etnaviv_gem_object *etnaviv_obj = mapping->object;
1182
1183 atomic_dec(&etnaviv_obj->gpu_active);
1184 /* drop the refcount taken in etnaviv_gpu_submit */
1185 etnaviv_gem_mapping_unreference(mapping);
1186 }
1187
1188 etnaviv_cmdbuf_free(cmdbuf);
1189 /*
1190 * We need to balance the runtime PM count caused by
1191 * each submission. Upon submission, we increment
1192 * the runtime PM counter, and allocate one event.
1193 * So here, we put the runtime PM count for each
1194 * completed event.
1195 */
1196 pm_runtime_put_autosuspend(gpu->dev);
1197 }
1198
1199 gpu->retired_fence = fence;
1200
1201 mutex_unlock(&gpu->lock);
1202
1203 wake_up_all(&gpu->fence_event);
1204 }
1205
1206 int etnaviv_gpu_wait_fence_interruptible(struct etnaviv_gpu *gpu,
1207 u32 fence, struct timespec *timeout)
1208 {
1209 int ret;
1210
1211 if (fence_after(fence, gpu->next_fence)) {
1212 DRM_ERROR("waiting on invalid fence: %u (of %u)\n",
1213 fence, gpu->next_fence);
1214 return -EINVAL;
1215 }
1216
1217 if (!timeout) {
1218 /* No timeout was requested: just test for completion */
1219 ret = fence_completed(gpu, fence) ? 0 : -EBUSY;
1220 } else {
1221 unsigned long remaining = etnaviv_timeout_to_jiffies(timeout);
1222
1223 ret = wait_event_interruptible_timeout(gpu->fence_event,
1224 fence_completed(gpu, fence),
1225 remaining);
1226 if (ret == 0) {
1227 DBG("timeout waiting for fence: %u (retired: %u completed: %u)",
1228 fence, gpu->retired_fence,
1229 gpu->completed_fence);
1230 ret = -ETIMEDOUT;
1231 } else if (ret != -ERESTARTSYS) {
1232 ret = 0;
1233 }
1234 }
1235
1236 return ret;
1237 }
1238
1239 /*
1240 * Wait for an object to become inactive. This, on it's own, is not race
1241 * free: the object is moved by the retire worker off the active list, and
1242 * then the iova is put. Moreover, the object could be re-submitted just
1243 * after we notice that it's become inactive.
1244 *
1245 * Although the retirement happens under the gpu lock, we don't want to hold
1246 * that lock in this function while waiting.
1247 */
1248 int etnaviv_gpu_wait_obj_inactive(struct etnaviv_gpu *gpu,
1249 struct etnaviv_gem_object *etnaviv_obj, struct timespec *timeout)
1250 {
1251 unsigned long remaining;
1252 long ret;
1253
1254 if (!timeout)
1255 return !is_active(etnaviv_obj) ? 0 : -EBUSY;
1256
1257 remaining = etnaviv_timeout_to_jiffies(timeout);
1258
1259 ret = wait_event_interruptible_timeout(gpu->fence_event,
1260 !is_active(etnaviv_obj),
1261 remaining);
1262 if (ret > 0) {
1263 struct etnaviv_drm_private *priv = gpu->drm->dev_private;
1264
1265 /* Synchronise with the retire worker */
1266 flush_workqueue(priv->wq);
1267 return 0;
1268 } else if (ret == -ERESTARTSYS) {
1269 return -ERESTARTSYS;
1270 } else {
1271 return -ETIMEDOUT;
1272 }
1273 }
1274
1275 int etnaviv_gpu_pm_get_sync(struct etnaviv_gpu *gpu)
1276 {
1277 return pm_runtime_get_sync(gpu->dev);
1278 }
1279
1280 void etnaviv_gpu_pm_put(struct etnaviv_gpu *gpu)
1281 {
1282 pm_runtime_mark_last_busy(gpu->dev);
1283 pm_runtime_put_autosuspend(gpu->dev);
1284 }
1285
1286 /* add bo's to gpu's ring, and kick gpu: */
1287 int etnaviv_gpu_submit(struct etnaviv_gpu *gpu,
1288 struct etnaviv_gem_submit *submit, struct etnaviv_cmdbuf *cmdbuf)
1289 {
1290 struct dma_fence *fence;
1291 unsigned int event, i;
1292 int ret;
1293
1294 ret = etnaviv_gpu_pm_get_sync(gpu);
1295 if (ret < 0)
1296 return ret;
1297
1298 /*
1299 * TODO
1300 *
1301 * - flush
1302 * - data endian
1303 * - prefetch
1304 *
1305 */
1306
1307 event = event_alloc(gpu);
1308 if (unlikely(event == ~0U)) {
1309 DRM_ERROR("no free event\n");
1310 ret = -EBUSY;
1311 goto out_pm_put;
1312 }
1313
1314 fence = etnaviv_gpu_fence_alloc(gpu);
1315 if (!fence) {
1316 event_free(gpu, event);
1317 ret = -ENOMEM;
1318 goto out_pm_put;
1319 }
1320
1321 mutex_lock(&gpu->lock);
1322
1323 gpu->event[event].fence = fence;
1324 submit->fence = fence->seqno;
1325 gpu->active_fence = submit->fence;
1326
1327 if (gpu->lastctx != cmdbuf->ctx) {
1328 gpu->mmu->need_flush = true;
1329 gpu->switch_context = true;
1330 gpu->lastctx = cmdbuf->ctx;
1331 }
1332
1333 etnaviv_buffer_queue(gpu, event, cmdbuf);
1334
1335 cmdbuf->fence = fence;
1336 list_add_tail(&cmdbuf->node, &gpu->active_cmd_list);
1337
1338 /* We're committed to adding this command buffer, hold a PM reference */
1339 pm_runtime_get_noresume(gpu->dev);
1340
1341 for (i = 0; i < submit->nr_bos; i++) {
1342 struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
1343
1344 /* Each cmdbuf takes a refcount on the mapping */
1345 etnaviv_gem_mapping_reference(submit->bos[i].mapping);
1346 cmdbuf->bo_map[i] = submit->bos[i].mapping;
1347 atomic_inc(&etnaviv_obj->gpu_active);
1348
1349 if (submit->bos[i].flags & ETNA_SUBMIT_BO_WRITE)
1350 reservation_object_add_excl_fence(etnaviv_obj->resv,
1351 fence);
1352 else
1353 reservation_object_add_shared_fence(etnaviv_obj->resv,
1354 fence);
1355 }
1356 cmdbuf->nr_bos = submit->nr_bos;
1357 hangcheck_timer_reset(gpu);
1358 ret = 0;
1359
1360 mutex_unlock(&gpu->lock);
1361
1362 out_pm_put:
1363 etnaviv_gpu_pm_put(gpu);
1364
1365 return ret;
1366 }
1367
1368 /*
1369 * Init/Cleanup:
1370 */
1371 static irqreturn_t irq_handler(int irq, void *data)
1372 {
1373 struct etnaviv_gpu *gpu = data;
1374 irqreturn_t ret = IRQ_NONE;
1375
1376 u32 intr = gpu_read(gpu, VIVS_HI_INTR_ACKNOWLEDGE);
1377
1378 if (intr != 0) {
1379 int event;
1380
1381 pm_runtime_mark_last_busy(gpu->dev);
1382
1383 dev_dbg(gpu->dev, "intr 0x%08x\n", intr);
1384
1385 if (intr & VIVS_HI_INTR_ACKNOWLEDGE_AXI_BUS_ERROR) {
1386 dev_err(gpu->dev, "AXI bus error\n");
1387 intr &= ~VIVS_HI_INTR_ACKNOWLEDGE_AXI_BUS_ERROR;
1388 }
1389
1390 if (intr & VIVS_HI_INTR_ACKNOWLEDGE_MMU_EXCEPTION) {
1391 int i;
1392
1393 dev_err_ratelimited(gpu->dev,
1394 "MMU fault status 0x%08x\n",
1395 gpu_read(gpu, VIVS_MMUv2_STATUS));
1396 for (i = 0; i < 4; i++) {
1397 dev_err_ratelimited(gpu->dev,
1398 "MMU %d fault addr 0x%08x\n",
1399 i, gpu_read(gpu,
1400 VIVS_MMUv2_EXCEPTION_ADDR(i)));
1401 }
1402 intr &= ~VIVS_HI_INTR_ACKNOWLEDGE_MMU_EXCEPTION;
1403 }
1404
1405 while ((event = ffs(intr)) != 0) {
1406 struct dma_fence *fence;
1407
1408 event -= 1;
1409
1410 intr &= ~(1 << event);
1411
1412 dev_dbg(gpu->dev, "event %u\n", event);
1413
1414 fence = gpu->event[event].fence;
1415 gpu->event[event].fence = NULL;
1416 dma_fence_signal(fence);
1417
1418 /*
1419 * Events can be processed out of order. Eg,
1420 * - allocate and queue event 0
1421 * - allocate event 1
1422 * - event 0 completes, we process it
1423 * - allocate and queue event 0
1424 * - event 1 and event 0 complete
1425 * we can end up processing event 0 first, then 1.
1426 */
1427 if (fence_after(fence->seqno, gpu->completed_fence))
1428 gpu->completed_fence = fence->seqno;
1429
1430 event_free(gpu, event);
1431 }
1432
1433 /* Retire the buffer objects in a work */
1434 etnaviv_queue_work(gpu->drm, &gpu->retire_work);
1435
1436 ret = IRQ_HANDLED;
1437 }
1438
1439 return ret;
1440 }
1441
1442 static int etnaviv_gpu_clk_enable(struct etnaviv_gpu *gpu)
1443 {
1444 int ret;
1445
1446 if (gpu->clk_bus) {
1447 ret = clk_prepare_enable(gpu->clk_bus);
1448 if (ret)
1449 return ret;
1450 }
1451
1452 if (gpu->clk_core) {
1453 ret = clk_prepare_enable(gpu->clk_core);
1454 if (ret)
1455 goto disable_clk_bus;
1456 }
1457
1458 if (gpu->clk_shader) {
1459 ret = clk_prepare_enable(gpu->clk_shader);
1460 if (ret)
1461 goto disable_clk_core;
1462 }
1463
1464 return 0;
1465
1466 disable_clk_core:
1467 if (gpu->clk_core)
1468 clk_disable_unprepare(gpu->clk_core);
1469 disable_clk_bus:
1470 if (gpu->clk_bus)
1471 clk_disable_unprepare(gpu->clk_bus);
1472
1473 return ret;
1474 }
1475
1476 static int etnaviv_gpu_clk_disable(struct etnaviv_gpu *gpu)
1477 {
1478 if (gpu->clk_shader)
1479 clk_disable_unprepare(gpu->clk_shader);
1480 if (gpu->clk_core)
1481 clk_disable_unprepare(gpu->clk_core);
1482 if (gpu->clk_bus)
1483 clk_disable_unprepare(gpu->clk_bus);
1484
1485 return 0;
1486 }
1487
1488 int etnaviv_gpu_wait_idle(struct etnaviv_gpu *gpu, unsigned int timeout_ms)
1489 {
1490 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
1491
1492 do {
1493 u32 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE);
1494
1495 if ((idle & gpu->idle_mask) == gpu->idle_mask)
1496 return 0;
1497
1498 if (time_is_before_jiffies(timeout)) {
1499 dev_warn(gpu->dev,
1500 "timed out waiting for idle: idle=0x%x\n",
1501 idle);
1502 return -ETIMEDOUT;
1503 }
1504
1505 udelay(5);
1506 } while (1);
1507 }
1508
1509 static int etnaviv_gpu_hw_suspend(struct etnaviv_gpu *gpu)
1510 {
1511 if (gpu->buffer) {
1512 /* Replace the last WAIT with END */
1513 etnaviv_buffer_end(gpu);
1514
1515 /*
1516 * We know that only the FE is busy here, this should
1517 * happen quickly (as the WAIT is only 200 cycles). If
1518 * we fail, just warn and continue.
1519 */
1520 etnaviv_gpu_wait_idle(gpu, 100);
1521 }
1522
1523 return etnaviv_gpu_clk_disable(gpu);
1524 }
1525
1526 #ifdef CONFIG_PM
1527 static int etnaviv_gpu_hw_resume(struct etnaviv_gpu *gpu)
1528 {
1529 u32 clock;
1530 int ret;
1531
1532 ret = mutex_lock_killable(&gpu->lock);
1533 if (ret)
1534 return ret;
1535
1536 clock = VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS |
1537 VIVS_HI_CLOCK_CONTROL_FSCALE_VAL(0x40);
1538
1539 etnaviv_gpu_load_clock(gpu, clock);
1540 etnaviv_gpu_hw_init(gpu);
1541
1542 gpu->switch_context = true;
1543 gpu->exec_state = -1;
1544
1545 mutex_unlock(&gpu->lock);
1546
1547 return 0;
1548 }
1549 #endif
1550
1551 static int etnaviv_gpu_bind(struct device *dev, struct device *master,
1552 void *data)
1553 {
1554 struct drm_device *drm = data;
1555 struct etnaviv_drm_private *priv = drm->dev_private;
1556 struct etnaviv_gpu *gpu = dev_get_drvdata(dev);
1557 int ret;
1558
1559 #ifdef CONFIG_PM
1560 ret = pm_runtime_get_sync(gpu->dev);
1561 #else
1562 ret = etnaviv_gpu_clk_enable(gpu);
1563 #endif
1564 if (ret < 0)
1565 return ret;
1566
1567 gpu->drm = drm;
1568 gpu->fence_context = dma_fence_context_alloc(1);
1569 spin_lock_init(&gpu->fence_spinlock);
1570
1571 INIT_LIST_HEAD(&gpu->active_cmd_list);
1572 INIT_WORK(&gpu->retire_work, retire_worker);
1573 INIT_WORK(&gpu->recover_work, recover_worker);
1574 init_waitqueue_head(&gpu->fence_event);
1575
1576 setup_deferrable_timer(&gpu->hangcheck_timer, hangcheck_handler,
1577 (unsigned long)gpu);
1578
1579 priv->gpu[priv->num_gpus++] = gpu;
1580
1581 pm_runtime_mark_last_busy(gpu->dev);
1582 pm_runtime_put_autosuspend(gpu->dev);
1583
1584 return 0;
1585 }
1586
1587 static void etnaviv_gpu_unbind(struct device *dev, struct device *master,
1588 void *data)
1589 {
1590 struct etnaviv_gpu *gpu = dev_get_drvdata(dev);
1591
1592 DBG("%s", dev_name(gpu->dev));
1593
1594 hangcheck_disable(gpu);
1595
1596 #ifdef CONFIG_PM
1597 pm_runtime_get_sync(gpu->dev);
1598 pm_runtime_put_sync_suspend(gpu->dev);
1599 #else
1600 etnaviv_gpu_hw_suspend(gpu);
1601 #endif
1602
1603 if (gpu->buffer) {
1604 etnaviv_cmdbuf_free(gpu->buffer);
1605 gpu->buffer = NULL;
1606 }
1607
1608 if (gpu->cmdbuf_suballoc) {
1609 etnaviv_cmdbuf_suballoc_destroy(gpu->cmdbuf_suballoc);
1610 gpu->cmdbuf_suballoc = NULL;
1611 }
1612
1613 if (gpu->mmu) {
1614 etnaviv_iommu_destroy(gpu->mmu);
1615 gpu->mmu = NULL;
1616 }
1617
1618 gpu->drm = NULL;
1619 }
1620
1621 static const struct component_ops gpu_ops = {
1622 .bind = etnaviv_gpu_bind,
1623 .unbind = etnaviv_gpu_unbind,
1624 };
1625
1626 static const struct of_device_id etnaviv_gpu_match[] = {
1627 {
1628 .compatible = "vivante,gc"
1629 },
1630 { /* sentinel */ }
1631 };
1632
1633 static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
1634 {
1635 struct device *dev = &pdev->dev;
1636 struct etnaviv_gpu *gpu;
1637 int err;
1638
1639 gpu = devm_kzalloc(dev, sizeof(*gpu), GFP_KERNEL);
1640 if (!gpu)
1641 return -ENOMEM;
1642
1643 gpu->dev = &pdev->dev;
1644 mutex_init(&gpu->lock);
1645
1646 /* Map registers: */
1647 gpu->mmio = etnaviv_ioremap(pdev, NULL, dev_name(gpu->dev));
1648 if (IS_ERR(gpu->mmio))
1649 return PTR_ERR(gpu->mmio);
1650
1651 /* Get Interrupt: */
1652 gpu->irq = platform_get_irq(pdev, 0);
1653 if (gpu->irq < 0) {
1654 dev_err(dev, "failed to get irq: %d\n", gpu->irq);
1655 return gpu->irq;
1656 }
1657
1658 err = devm_request_irq(&pdev->dev, gpu->irq, irq_handler, 0,
1659 dev_name(gpu->dev), gpu);
1660 if (err) {
1661 dev_err(dev, "failed to request IRQ%u: %d\n", gpu->irq, err);
1662 return err;
1663 }
1664
1665 /* Get Clocks: */
1666 gpu->clk_bus = devm_clk_get(&pdev->dev, "bus");
1667 DBG("clk_bus: %p", gpu->clk_bus);
1668 if (IS_ERR(gpu->clk_bus))
1669 gpu->clk_bus = NULL;
1670
1671 gpu->clk_core = devm_clk_get(&pdev->dev, "core");
1672 DBG("clk_core: %p", gpu->clk_core);
1673 if (IS_ERR(gpu->clk_core))
1674 gpu->clk_core = NULL;
1675
1676 gpu->clk_shader = devm_clk_get(&pdev->dev, "shader");
1677 DBG("clk_shader: %p", gpu->clk_shader);
1678 if (IS_ERR(gpu->clk_shader))
1679 gpu->clk_shader = NULL;
1680
1681 /* TODO: figure out max mapped size */
1682 dev_set_drvdata(dev, gpu);
1683
1684 /*
1685 * We treat the device as initially suspended. The runtime PM
1686 * autosuspend delay is rather arbitary: no measurements have
1687 * yet been performed to determine an appropriate value.
1688 */
1689 pm_runtime_use_autosuspend(gpu->dev);
1690 pm_runtime_set_autosuspend_delay(gpu->dev, 200);
1691 pm_runtime_enable(gpu->dev);
1692
1693 err = component_add(&pdev->dev, &gpu_ops);
1694 if (err < 0) {
1695 dev_err(&pdev->dev, "failed to register component: %d\n", err);
1696 return err;
1697 }
1698
1699 return 0;
1700 }
1701
1702 static int etnaviv_gpu_platform_remove(struct platform_device *pdev)
1703 {
1704 component_del(&pdev->dev, &gpu_ops);
1705 pm_runtime_disable(&pdev->dev);
1706 return 0;
1707 }
1708
1709 #ifdef CONFIG_PM
1710 static int etnaviv_gpu_rpm_suspend(struct device *dev)
1711 {
1712 struct etnaviv_gpu *gpu = dev_get_drvdata(dev);
1713 u32 idle, mask;
1714
1715 /* If we have outstanding fences, we're not idle */
1716 if (gpu->completed_fence != gpu->active_fence)
1717 return -EBUSY;
1718
1719 /* Check whether the hardware (except FE) is idle */
1720 mask = gpu->idle_mask & ~VIVS_HI_IDLE_STATE_FE;
1721 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE) & mask;
1722 if (idle != mask)
1723 return -EBUSY;
1724
1725 return etnaviv_gpu_hw_suspend(gpu);
1726 }
1727
1728 static int etnaviv_gpu_rpm_resume(struct device *dev)
1729 {
1730 struct etnaviv_gpu *gpu = dev_get_drvdata(dev);
1731 int ret;
1732
1733 ret = etnaviv_gpu_clk_enable(gpu);
1734 if (ret)
1735 return ret;
1736
1737 /* Re-initialise the basic hardware state */
1738 if (gpu->drm && gpu->buffer) {
1739 ret = etnaviv_gpu_hw_resume(gpu);
1740 if (ret) {
1741 etnaviv_gpu_clk_disable(gpu);
1742 return ret;
1743 }
1744 }
1745
1746 return 0;
1747 }
1748 #endif
1749
1750 static const struct dev_pm_ops etnaviv_gpu_pm_ops = {
1751 SET_RUNTIME_PM_OPS(etnaviv_gpu_rpm_suspend, etnaviv_gpu_rpm_resume,
1752 NULL)
1753 };
1754
1755 struct platform_driver etnaviv_gpu_driver = {
1756 .driver = {
1757 .name = "etnaviv-gpu",
1758 .owner = THIS_MODULE,
1759 .pm = &etnaviv_gpu_pm_ops,
1760 .of_match_table = etnaviv_gpu_match,
1761 },
1762 .probe = etnaviv_gpu_platform_probe,
1763 .remove = etnaviv_gpu_platform_remove,
1764 .id_table = gpu_ids,
1765 };
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