1// SPDX-License-Identifier: GPL-2.0 OR MIT
2/* Copyright 2017-2019 Qiang Yu <yuq825@gmail.com> */
3
4#include <linux/regulator/consumer.h>
5#include <linux/reset.h>
6#include <linux/clk.h>
7#include <linux/slab.h>
8#include <linux/dma-mapping.h>
9#include <linux/platform_device.h>
10
11#include "lima_device.h"
12#include "lima_gp.h"
13#include "lima_pp.h"
14#include "lima_mmu.h"
15#include "lima_pmu.h"
16#include "lima_l2_cache.h"
17#include "lima_dlbu.h"
18#include "lima_bcast.h"
19#include "lima_vm.h"
20
21struct lima_ip_desc {
22 char *name;
23 char *irq_name;
24 bool must_have[lima_gpu_num];
25 int offset[lima_gpu_num];
26
27 int (*init)(struct lima_ip *ip);
28 void (*fini)(struct lima_ip *ip);
29 int (*resume)(struct lima_ip *ip);
30 void (*suspend)(struct lima_ip *ip);
31};
32
33#define LIMA_IP_DESC(ipname, mst0, mst1, off0, off1, func, irq) \
34 [lima_ip_##ipname] = { \
35 .name = #ipname, \
36 .irq_name = irq, \
37 .must_have = { \
38 [lima_gpu_mali400] = mst0, \
39 [lima_gpu_mali450] = mst1, \
40 }, \
41 .offset = { \
42 [lima_gpu_mali400] = off0, \
43 [lima_gpu_mali450] = off1, \
44 }, \
45 .init = lima_##func##_init, \
46 .fini = lima_##func##_fini, \
47 .resume = lima_##func##_resume, \
48 .suspend = lima_##func##_suspend, \
49 }
50
51static struct lima_ip_desc lima_ip_desc[lima_ip_num] = {
52 LIMA_IP_DESC(pmu, false, false, 0x02000, 0x02000, pmu, "pmu"),
53 LIMA_IP_DESC(l2_cache0, true, true, 0x01000, 0x10000, l2_cache, NULL),
54 LIMA_IP_DESC(l2_cache1, false, true, -1, 0x01000, l2_cache, NULL),
55 LIMA_IP_DESC(l2_cache2, false, false, -1, 0x11000, l2_cache, NULL),
56 LIMA_IP_DESC(gp, true, true, 0x00000, 0x00000, gp, "gp"),
57 LIMA_IP_DESC(pp0, true, true, 0x08000, 0x08000, pp, "pp0"),
58 LIMA_IP_DESC(pp1, false, false, 0x0A000, 0x0A000, pp, "pp1"),
59 LIMA_IP_DESC(pp2, false, false, 0x0C000, 0x0C000, pp, "pp2"),
60 LIMA_IP_DESC(pp3, false, false, 0x0E000, 0x0E000, pp, "pp3"),
61 LIMA_IP_DESC(pp4, false, false, -1, 0x28000, pp, "pp4"),
62 LIMA_IP_DESC(pp5, false, false, -1, 0x2A000, pp, "pp5"),
63 LIMA_IP_DESC(pp6, false, false, -1, 0x2C000, pp, "pp6"),
64 LIMA_IP_DESC(pp7, false, false, -1, 0x2E000, pp, "pp7"),
65 LIMA_IP_DESC(gpmmu, true, true, 0x03000, 0x03000, mmu, "gpmmu"),
66 LIMA_IP_DESC(ppmmu0, true, true, 0x04000, 0x04000, mmu, "ppmmu0"),
67 LIMA_IP_DESC(ppmmu1, false, false, 0x05000, 0x05000, mmu, "ppmmu1"),
68 LIMA_IP_DESC(ppmmu2, false, false, 0x06000, 0x06000, mmu, "ppmmu2"),
69 LIMA_IP_DESC(ppmmu3, false, false, 0x07000, 0x07000, mmu, "ppmmu3"),
70 LIMA_IP_DESC(ppmmu4, false, false, -1, 0x1C000, mmu, "ppmmu4"),
71 LIMA_IP_DESC(ppmmu5, false, false, -1, 0x1D000, mmu, "ppmmu5"),
72 LIMA_IP_DESC(ppmmu6, false, false, -1, 0x1E000, mmu, "ppmmu6"),
73 LIMA_IP_DESC(ppmmu7, false, false, -1, 0x1F000, mmu, "ppmmu7"),
74 LIMA_IP_DESC(dlbu, false, true, -1, 0x14000, dlbu, NULL),
75 LIMA_IP_DESC(bcast, false, true, -1, 0x13000, bcast, NULL),
76 LIMA_IP_DESC(pp_bcast, false, true, -1, 0x16000, pp_bcast, "pp"),
77 LIMA_IP_DESC(ppmmu_bcast, false, true, -1, 0x15000, mmu, NULL),
78};
79
80const char *lima_ip_name(struct lima_ip *ip)
81{
82 return lima_ip_desc[ip->id].name;
83}
84
85static int lima_clk_enable(struct lima_device *dev)
86{
87 int err;
88
89 err = clk_prepare_enable(clk: dev->clk_bus);
90 if (err)
91 return err;
92
93 err = clk_prepare_enable(clk: dev->clk_gpu);
94 if (err)
95 goto error_out0;
96
97 if (dev->reset) {
98 err = reset_control_deassert(rstc: dev->reset);
99 if (err) {
100 dev_err(dev->dev,
101 "reset controller deassert failed %d\n", err);
102 goto error_out1;
103 }
104 }
105
106 return 0;
107
108error_out1:
109 clk_disable_unprepare(clk: dev->clk_gpu);
110error_out0:
111 clk_disable_unprepare(clk: dev->clk_bus);
112 return err;
113}
114
115static void lima_clk_disable(struct lima_device *dev)
116{
117 if (dev->reset)
118 reset_control_assert(rstc: dev->reset);
119 clk_disable_unprepare(clk: dev->clk_gpu);
120 clk_disable_unprepare(clk: dev->clk_bus);
121}
122
123static int lima_clk_init(struct lima_device *dev)
124{
125 int err;
126
127 dev->clk_bus = devm_clk_get(dev: dev->dev, id: "bus");
128 if (IS_ERR(ptr: dev->clk_bus)) {
129 err = PTR_ERR(ptr: dev->clk_bus);
130 if (err != -EPROBE_DEFER)
131 dev_err(dev->dev, "get bus clk failed %d\n", err);
132 dev->clk_bus = NULL;
133 return err;
134 }
135
136 dev->clk_gpu = devm_clk_get(dev: dev->dev, id: "core");
137 if (IS_ERR(ptr: dev->clk_gpu)) {
138 err = PTR_ERR(ptr: dev->clk_gpu);
139 if (err != -EPROBE_DEFER)
140 dev_err(dev->dev, "get core clk failed %d\n", err);
141 dev->clk_gpu = NULL;
142 return err;
143 }
144
145 dev->reset = devm_reset_control_array_get_optional_shared(dev: dev->dev);
146 if (IS_ERR(ptr: dev->reset)) {
147 err = PTR_ERR(ptr: dev->reset);
148 if (err != -EPROBE_DEFER)
149 dev_err(dev->dev, "get reset controller failed %d\n",
150 err);
151 dev->reset = NULL;
152 return err;
153 }
154
155 return lima_clk_enable(dev);
156}
157
158static void lima_clk_fini(struct lima_device *dev)
159{
160 lima_clk_disable(dev);
161}
162
163static int lima_regulator_enable(struct lima_device *dev)
164{
165 int ret;
166
167 if (!dev->regulator)
168 return 0;
169
170 ret = regulator_enable(regulator: dev->regulator);
171 if (ret < 0) {
172 dev_err(dev->dev, "failed to enable regulator: %d\n", ret);
173 return ret;
174 }
175
176 return 0;
177}
178
179static void lima_regulator_disable(struct lima_device *dev)
180{
181 if (dev->regulator)
182 regulator_disable(regulator: dev->regulator);
183}
184
185static int lima_regulator_init(struct lima_device *dev)
186{
187 int ret;
188
189 dev->regulator = devm_regulator_get_optional(dev: dev->dev, id: "mali");
190 if (IS_ERR(ptr: dev->regulator)) {
191 ret = PTR_ERR(ptr: dev->regulator);
192 dev->regulator = NULL;
193 if (ret == -ENODEV)
194 return 0;
195 if (ret != -EPROBE_DEFER)
196 dev_err(dev->dev, "failed to get regulator: %d\n", ret);
197 return ret;
198 }
199
200 return lima_regulator_enable(dev);
201}
202
203static void lima_regulator_fini(struct lima_device *dev)
204{
205 lima_regulator_disable(dev);
206}
207
208static int lima_init_ip(struct lima_device *dev, int index)
209{
210 struct platform_device *pdev = to_platform_device(dev->dev);
211 struct lima_ip_desc *desc = lima_ip_desc + index;
212 struct lima_ip *ip = dev->ip + index;
213 const char *irq_name = desc->irq_name;
214 int offset = desc->offset[dev->id];
215 bool must = desc->must_have[dev->id];
216 int err;
217
218 if (offset < 0)
219 return 0;
220
221 ip->dev = dev;
222 ip->id = index;
223 ip->iomem = dev->iomem + offset;
224 if (irq_name) {
225 err = must ? platform_get_irq_byname(pdev, irq_name) :
226 platform_get_irq_byname_optional(dev: pdev, name: irq_name);
227 if (err < 0)
228 goto out;
229 ip->irq = err;
230 }
231
232 err = desc->init(ip);
233 if (!err) {
234 ip->present = true;
235 return 0;
236 }
237
238out:
239 return must ? err : 0;
240}
241
242static void lima_fini_ip(struct lima_device *ldev, int index)
243{
244 struct lima_ip_desc *desc = lima_ip_desc + index;
245 struct lima_ip *ip = ldev->ip + index;
246
247 if (ip->present)
248 desc->fini(ip);
249}
250
251static int lima_resume_ip(struct lima_device *ldev, int index)
252{
253 struct lima_ip_desc *desc = lima_ip_desc + index;
254 struct lima_ip *ip = ldev->ip + index;
255 int ret = 0;
256
257 if (ip->present)
258 ret = desc->resume(ip);
259
260 return ret;
261}
262
263static void lima_suspend_ip(struct lima_device *ldev, int index)
264{
265 struct lima_ip_desc *desc = lima_ip_desc + index;
266 struct lima_ip *ip = ldev->ip + index;
267
268 if (ip->present)
269 desc->suspend(ip);
270}
271
272static int lima_init_gp_pipe(struct lima_device *dev)
273{
274 struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_gp;
275 int err;
276
277 pipe->ldev = dev;
278
279 err = lima_sched_pipe_init(pipe, name: "gp");
280 if (err)
281 return err;
282
283 pipe->l2_cache[pipe->num_l2_cache++] = dev->ip + lima_ip_l2_cache0;
284 pipe->mmu[pipe->num_mmu++] = dev->ip + lima_ip_gpmmu;
285 pipe->processor[pipe->num_processor++] = dev->ip + lima_ip_gp;
286
287 err = lima_gp_pipe_init(dev);
288 if (err) {
289 lima_sched_pipe_fini(pipe);
290 return err;
291 }
292
293 return 0;
294}
295
296static void lima_fini_gp_pipe(struct lima_device *dev)
297{
298 struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_gp;
299
300 lima_gp_pipe_fini(dev);
301 lima_sched_pipe_fini(pipe);
302}
303
304static int lima_init_pp_pipe(struct lima_device *dev)
305{
306 struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_pp;
307 int err, i;
308
309 pipe->ldev = dev;
310
311 err = lima_sched_pipe_init(pipe, name: "pp");
312 if (err)
313 return err;
314
315 for (i = 0; i < LIMA_SCHED_PIPE_MAX_PROCESSOR; i++) {
316 struct lima_ip *pp = dev->ip + lima_ip_pp0 + i;
317 struct lima_ip *ppmmu = dev->ip + lima_ip_ppmmu0 + i;
318 struct lima_ip *l2_cache;
319
320 if (dev->id == lima_gpu_mali400)
321 l2_cache = dev->ip + lima_ip_l2_cache0;
322 else
323 l2_cache = dev->ip + lima_ip_l2_cache1 + (i >> 2);
324
325 if (pp->present && ppmmu->present && l2_cache->present) {
326 pipe->mmu[pipe->num_mmu++] = ppmmu;
327 pipe->processor[pipe->num_processor++] = pp;
328 if (!pipe->l2_cache[i >> 2])
329 pipe->l2_cache[pipe->num_l2_cache++] = l2_cache;
330 }
331 }
332
333 if (dev->ip[lima_ip_bcast].present) {
334 pipe->bcast_processor = dev->ip + lima_ip_pp_bcast;
335 pipe->bcast_mmu = dev->ip + lima_ip_ppmmu_bcast;
336 }
337
338 err = lima_pp_pipe_init(dev);
339 if (err) {
340 lima_sched_pipe_fini(pipe);
341 return err;
342 }
343
344 return 0;
345}
346
347static void lima_fini_pp_pipe(struct lima_device *dev)
348{
349 struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_pp;
350
351 lima_pp_pipe_fini(dev);
352 lima_sched_pipe_fini(pipe);
353}
354
355int lima_device_init(struct lima_device *ldev)
356{
357 struct platform_device *pdev = to_platform_device(ldev->dev);
358 int err, i;
359
360 dma_set_coherent_mask(dev: ldev->dev, DMA_BIT_MASK(32));
361 dma_set_max_seg_size(dev: ldev->dev, UINT_MAX);
362
363 err = lima_clk_init(dev: ldev);
364 if (err)
365 return err;
366
367 err = lima_regulator_init(dev: ldev);
368 if (err)
369 goto err_out0;
370
371 ldev->empty_vm = lima_vm_create(dev: ldev);
372 if (!ldev->empty_vm) {
373 err = -ENOMEM;
374 goto err_out1;
375 }
376
377 ldev->va_start = 0;
378 if (ldev->id == lima_gpu_mali450) {
379 ldev->va_end = LIMA_VA_RESERVE_START;
380 ldev->dlbu_cpu = dma_alloc_wc(
381 dev: ldev->dev, LIMA_PAGE_SIZE,
382 dma_addr: &ldev->dlbu_dma, GFP_KERNEL | __GFP_NOWARN);
383 if (!ldev->dlbu_cpu) {
384 err = -ENOMEM;
385 goto err_out2;
386 }
387 } else
388 ldev->va_end = LIMA_VA_RESERVE_END;
389
390 ldev->iomem = devm_platform_ioremap_resource(pdev, index: 0);
391 if (IS_ERR(ptr: ldev->iomem)) {
392 dev_err(ldev->dev, "fail to ioremap iomem\n");
393 err = PTR_ERR(ptr: ldev->iomem);
394 goto err_out3;
395 }
396
397 for (i = 0; i < lima_ip_num; i++) {
398 err = lima_init_ip(dev: ldev, index: i);
399 if (err)
400 goto err_out4;
401 }
402
403 err = lima_init_gp_pipe(dev: ldev);
404 if (err)
405 goto err_out4;
406
407 err = lima_init_pp_pipe(dev: ldev);
408 if (err)
409 goto err_out5;
410
411 ldev->dump.magic = LIMA_DUMP_MAGIC;
412 ldev->dump.version_major = LIMA_DUMP_MAJOR;
413 ldev->dump.version_minor = LIMA_DUMP_MINOR;
414 INIT_LIST_HEAD(list: &ldev->error_task_list);
415 mutex_init(&ldev->error_task_list_lock);
416
417 dev_info(ldev->dev, "bus rate = %lu\n", clk_get_rate(ldev->clk_bus));
418 dev_info(ldev->dev, "mod rate = %lu", clk_get_rate(ldev->clk_gpu));
419
420 return 0;
421
422err_out5:
423 lima_fini_gp_pipe(dev: ldev);
424err_out4:
425 while (--i >= 0)
426 lima_fini_ip(ldev, index: i);
427err_out3:
428 if (ldev->dlbu_cpu)
429 dma_free_wc(dev: ldev->dev, LIMA_PAGE_SIZE,
430 cpu_addr: ldev->dlbu_cpu, dma_addr: ldev->dlbu_dma);
431err_out2:
432 lima_vm_put(vm: ldev->empty_vm);
433err_out1:
434 lima_regulator_fini(dev: ldev);
435err_out0:
436 lima_clk_fini(dev: ldev);
437 return err;
438}
439
440void lima_device_fini(struct lima_device *ldev)
441{
442 int i;
443 struct lima_sched_error_task *et, *tmp;
444
445 list_for_each_entry_safe(et, tmp, &ldev->error_task_list, list) {
446 list_del(entry: &et->list);
447 kvfree(addr: et);
448 }
449 mutex_destroy(lock: &ldev->error_task_list_lock);
450
451 lima_fini_pp_pipe(dev: ldev);
452 lima_fini_gp_pipe(dev: ldev);
453
454 for (i = lima_ip_num - 1; i >= 0; i--)
455 lima_fini_ip(ldev, index: i);
456
457 if (ldev->dlbu_cpu)
458 dma_free_wc(dev: ldev->dev, LIMA_PAGE_SIZE,
459 cpu_addr: ldev->dlbu_cpu, dma_addr: ldev->dlbu_dma);
460
461 lima_vm_put(vm: ldev->empty_vm);
462
463 lima_regulator_fini(dev: ldev);
464
465 lima_clk_fini(dev: ldev);
466}
467
468int lima_device_resume(struct device *dev)
469{
470 struct lima_device *ldev = dev_get_drvdata(dev);
471 int i, err;
472
473 err = lima_clk_enable(dev: ldev);
474 if (err) {
475 dev_err(dev, "resume clk fail %d\n", err);
476 return err;
477 }
478
479 err = lima_regulator_enable(dev: ldev);
480 if (err) {
481 dev_err(dev, "resume regulator fail %d\n", err);
482 goto err_out0;
483 }
484
485 for (i = 0; i < lima_ip_num; i++) {
486 err = lima_resume_ip(ldev, index: i);
487 if (err) {
488 dev_err(dev, "resume ip %d fail\n", i);
489 goto err_out1;
490 }
491 }
492
493 err = lima_devfreq_resume(devfreq: &ldev->devfreq);
494 if (err) {
495 dev_err(dev, "devfreq resume fail\n");
496 goto err_out1;
497 }
498
499 return 0;
500
501err_out1:
502 while (--i >= 0)
503 lima_suspend_ip(ldev, index: i);
504 lima_regulator_disable(dev: ldev);
505err_out0:
506 lima_clk_disable(dev: ldev);
507 return err;
508}
509
510int lima_device_suspend(struct device *dev)
511{
512 struct lima_device *ldev = dev_get_drvdata(dev);
513 int i, err;
514
515 /* check any task running */
516 for (i = 0; i < lima_pipe_num; i++) {
517 if (atomic_read(v: &ldev->pipe[i].base.credit_count))
518 return -EBUSY;
519 }
520
521 err = lima_devfreq_suspend(devfreq: &ldev->devfreq);
522 if (err) {
523 dev_err(dev, "devfreq suspend fail\n");
524 return err;
525 }
526
527 for (i = lima_ip_num - 1; i >= 0; i--)
528 lima_suspend_ip(ldev, index: i);
529
530 lima_regulator_disable(dev: ldev);
531
532 lima_clk_disable(dev: ldev);
533
534 return 0;
535}
536

source code of linux/drivers/gpu/drm/lima/lima_device.c