1
2
3
4
5#include <linux/clk.h>
6#include <linux/reset.h>
7#include <linux/platform_device.h>
8#include <linux/pm_domain.h>
9#include <linux/regulator/consumer.h>
10
11#include "panfrost_device.h"
12#include "panfrost_devfreq.h"
13#include "panfrost_features.h"
14#include "panfrost_gpu.h"
15#include "panfrost_job.h"
16#include "panfrost_mmu.h"
17#include "panfrost_perfcnt.h"
18
19static int panfrost_reset_init(struct panfrost_device *pfdev)
20{
21 pfdev->rstc = devm_reset_control_array_get_optional_exclusive(pfdev->dev);
22 if (IS_ERR(pfdev->rstc)) {
23 dev_err(pfdev->dev, "get reset failed %ld\n", PTR_ERR(pfdev->rstc));
24 return PTR_ERR(pfdev->rstc);
25 }
26
27 return reset_control_deassert(pfdev->rstc);
28}
29
30static void panfrost_reset_fini(struct panfrost_device *pfdev)
31{
32 reset_control_assert(pfdev->rstc);
33}
34
35static int panfrost_clk_init(struct panfrost_device *pfdev)
36{
37 int err;
38 unsigned long rate;
39
40 pfdev->clock = devm_clk_get(pfdev->dev, NULL);
41 if (IS_ERR(pfdev->clock)) {
42 dev_err(pfdev->dev, "get clock failed %ld\n", PTR_ERR(pfdev->clock));
43 return PTR_ERR(pfdev->clock);
44 }
45
46 rate = clk_get_rate(pfdev->clock);
47 dev_info(pfdev->dev, "clock rate = %lu\n", rate);
48
49 err = clk_prepare_enable(pfdev->clock);
50 if (err)
51 return err;
52
53 pfdev->bus_clock = devm_clk_get_optional(pfdev->dev, "bus");
54 if (IS_ERR(pfdev->bus_clock)) {
55 dev_err(pfdev->dev, "get bus_clock failed %ld\n",
56 PTR_ERR(pfdev->bus_clock));
57 err = PTR_ERR(pfdev->bus_clock);
58 goto disable_clock;
59 }
60
61 if (pfdev->bus_clock) {
62 rate = clk_get_rate(pfdev->bus_clock);
63 dev_info(pfdev->dev, "bus_clock rate = %lu\n", rate);
64
65 err = clk_prepare_enable(pfdev->bus_clock);
66 if (err)
67 goto disable_clock;
68 }
69
70 return 0;
71
72disable_clock:
73 clk_disable_unprepare(pfdev->clock);
74
75 return err;
76}
77
78static void panfrost_clk_fini(struct panfrost_device *pfdev)
79{
80 clk_disable_unprepare(pfdev->bus_clock);
81 clk_disable_unprepare(pfdev->clock);
82}
83
84static int panfrost_regulator_init(struct panfrost_device *pfdev)
85{
86 int ret, i;
87
88 pfdev->regulators = devm_kcalloc(pfdev->dev, pfdev->comp->num_supplies,
89 sizeof(*pfdev->regulators),
90 GFP_KERNEL);
91 if (!pfdev->regulators)
92 return -ENOMEM;
93
94 for (i = 0; i < pfdev->comp->num_supplies; i++)
95 pfdev->regulators[i].supply = pfdev->comp->supply_names[i];
96
97 ret = devm_regulator_bulk_get(pfdev->dev,
98 pfdev->comp->num_supplies,
99 pfdev->regulators);
100 if (ret < 0) {
101 if (ret != -EPROBE_DEFER)
102 dev_err(pfdev->dev, "failed to get regulators: %d\n",
103 ret);
104 return ret;
105 }
106
107 ret = regulator_bulk_enable(pfdev->comp->num_supplies,
108 pfdev->regulators);
109 if (ret < 0) {
110 dev_err(pfdev->dev, "failed to enable regulators: %d\n", ret);
111 return ret;
112 }
113
114 return 0;
115}
116
117static void panfrost_regulator_fini(struct panfrost_device *pfdev)
118{
119 if (!pfdev->regulators)
120 return;
121
122 regulator_bulk_disable(pfdev->comp->num_supplies, pfdev->regulators);
123}
124
125static void panfrost_pm_domain_fini(struct panfrost_device *pfdev)
126{
127 int i;
128
129 for (i = 0; i < ARRAY_SIZE(pfdev->pm_domain_devs); i++) {
130 if (!pfdev->pm_domain_devs[i])
131 break;
132
133 if (pfdev->pm_domain_links[i])
134 device_link_del(pfdev->pm_domain_links[i]);
135
136 dev_pm_domain_detach(pfdev->pm_domain_devs[i], true);
137 }
138}
139
140static int panfrost_pm_domain_init(struct panfrost_device *pfdev)
141{
142 int err;
143 int i, num_domains;
144
145 num_domains = of_count_phandle_with_args(pfdev->dev->of_node,
146 "power-domains",
147 "#power-domain-cells");
148
149
150
151
152
153 if (num_domains < 2 && pfdev->comp->num_pm_domains < 2)
154 return 0;
155
156 if (num_domains != pfdev->comp->num_pm_domains) {
157 dev_err(pfdev->dev,
158 "Incorrect number of power domains: %d provided, %d needed\n",
159 num_domains, pfdev->comp->num_pm_domains);
160 return -EINVAL;
161 }
162
163 if (WARN(num_domains > ARRAY_SIZE(pfdev->pm_domain_devs),
164 "Too many supplies in compatible structure.\n"))
165 return -EINVAL;
166
167 for (i = 0; i < num_domains; i++) {
168 pfdev->pm_domain_devs[i] =
169 dev_pm_domain_attach_by_name(pfdev->dev,
170 pfdev->comp->pm_domain_names[i]);
171 if (IS_ERR_OR_NULL(pfdev->pm_domain_devs[i])) {
172 err = PTR_ERR(pfdev->pm_domain_devs[i]) ? : -ENODATA;
173 pfdev->pm_domain_devs[i] = NULL;
174 dev_err(pfdev->dev,
175 "failed to get pm-domain %s(%d): %d\n",
176 pfdev->comp->pm_domain_names[i], i, err);
177 goto err;
178 }
179
180 pfdev->pm_domain_links[i] = device_link_add(pfdev->dev,
181 pfdev->pm_domain_devs[i], DL_FLAG_PM_RUNTIME |
182 DL_FLAG_STATELESS | DL_FLAG_RPM_ACTIVE);
183 if (!pfdev->pm_domain_links[i]) {
184 dev_err(pfdev->pm_domain_devs[i],
185 "adding device link failed!\n");
186 err = -ENODEV;
187 goto err;
188 }
189 }
190
191 return 0;
192
193err:
194 panfrost_pm_domain_fini(pfdev);
195 return err;
196}
197
198int panfrost_device_init(struct panfrost_device *pfdev)
199{
200 int err;
201 struct resource *res;
202
203 mutex_init(&pfdev->sched_lock);
204 INIT_LIST_HEAD(&pfdev->scheduled_jobs);
205 INIT_LIST_HEAD(&pfdev->as_lru_list);
206
207 spin_lock_init(&pfdev->as_lock);
208
209 err = panfrost_clk_init(pfdev);
210 if (err) {
211 dev_err(pfdev->dev, "clk init failed %d\n", err);
212 return err;
213 }
214
215 err = panfrost_devfreq_init(pfdev);
216 if (err) {
217 if (err != -EPROBE_DEFER)
218 dev_err(pfdev->dev, "devfreq init failed %d\n", err);
219 goto out_clk;
220 }
221
222
223 if (!pfdev->pfdevfreq.opp_of_table_added) {
224 err = panfrost_regulator_init(pfdev);
225 if (err)
226 goto out_devfreq;
227 }
228
229 err = panfrost_reset_init(pfdev);
230 if (err) {
231 dev_err(pfdev->dev, "reset init failed %d\n", err);
232 goto out_regulator;
233 }
234
235 err = panfrost_pm_domain_init(pfdev);
236 if (err)
237 goto out_reset;
238
239 res = platform_get_resource(pfdev->pdev, IORESOURCE_MEM, 0);
240 pfdev->iomem = devm_ioremap_resource(pfdev->dev, res);
241 if (IS_ERR(pfdev->iomem)) {
242 err = PTR_ERR(pfdev->iomem);
243 goto out_pm_domain;
244 }
245
246 err = panfrost_gpu_init(pfdev);
247 if (err)
248 goto out_pm_domain;
249
250 err = panfrost_mmu_init(pfdev);
251 if (err)
252 goto out_gpu;
253
254 err = panfrost_job_init(pfdev);
255 if (err)
256 goto out_mmu;
257
258 err = panfrost_perfcnt_init(pfdev);
259 if (err)
260 goto out_job;
261
262 return 0;
263out_job:
264 panfrost_job_fini(pfdev);
265out_mmu:
266 panfrost_mmu_fini(pfdev);
267out_gpu:
268 panfrost_gpu_fini(pfdev);
269out_pm_domain:
270 panfrost_pm_domain_fini(pfdev);
271out_reset:
272 panfrost_reset_fini(pfdev);
273out_regulator:
274 panfrost_regulator_fini(pfdev);
275out_devfreq:
276 panfrost_devfreq_fini(pfdev);
277out_clk:
278 panfrost_clk_fini(pfdev);
279 return err;
280}
281
282void panfrost_device_fini(struct panfrost_device *pfdev)
283{
284 panfrost_perfcnt_fini(pfdev);
285 panfrost_job_fini(pfdev);
286 panfrost_mmu_fini(pfdev);
287 panfrost_gpu_fini(pfdev);
288 panfrost_pm_domain_fini(pfdev);
289 panfrost_reset_fini(pfdev);
290 panfrost_devfreq_fini(pfdev);
291 panfrost_regulator_fini(pfdev);
292 panfrost_clk_fini(pfdev);
293}
294
295#define PANFROST_EXCEPTION(id) \
296 [DRM_PANFROST_EXCEPTION_ ## id] = { \
297 .name = #id, \
298 }
299
300struct panfrost_exception_info {
301 const char *name;
302};
303
304static const struct panfrost_exception_info panfrost_exception_infos[] = {
305 PANFROST_EXCEPTION(OK),
306 PANFROST_EXCEPTION(DONE),
307 PANFROST_EXCEPTION(INTERRUPTED),
308 PANFROST_EXCEPTION(STOPPED),
309 PANFROST_EXCEPTION(TERMINATED),
310 PANFROST_EXCEPTION(KABOOM),
311 PANFROST_EXCEPTION(EUREKA),
312 PANFROST_EXCEPTION(ACTIVE),
313 PANFROST_EXCEPTION(JOB_CONFIG_FAULT),
314 PANFROST_EXCEPTION(JOB_POWER_FAULT),
315 PANFROST_EXCEPTION(JOB_READ_FAULT),
316 PANFROST_EXCEPTION(JOB_WRITE_FAULT),
317 PANFROST_EXCEPTION(JOB_AFFINITY_FAULT),
318 PANFROST_EXCEPTION(JOB_BUS_FAULT),
319 PANFROST_EXCEPTION(INSTR_INVALID_PC),
320 PANFROST_EXCEPTION(INSTR_INVALID_ENC),
321 PANFROST_EXCEPTION(INSTR_TYPE_MISMATCH),
322 PANFROST_EXCEPTION(INSTR_OPERAND_FAULT),
323 PANFROST_EXCEPTION(INSTR_TLS_FAULT),
324 PANFROST_EXCEPTION(INSTR_BARRIER_FAULT),
325 PANFROST_EXCEPTION(INSTR_ALIGN_FAULT),
326 PANFROST_EXCEPTION(DATA_INVALID_FAULT),
327 PANFROST_EXCEPTION(TILE_RANGE_FAULT),
328 PANFROST_EXCEPTION(ADDR_RANGE_FAULT),
329 PANFROST_EXCEPTION(IMPRECISE_FAULT),
330 PANFROST_EXCEPTION(OOM),
331 PANFROST_EXCEPTION(OOM_AFBC),
332 PANFROST_EXCEPTION(UNKNOWN),
333 PANFROST_EXCEPTION(DELAYED_BUS_FAULT),
334 PANFROST_EXCEPTION(GPU_SHAREABILITY_FAULT),
335 PANFROST_EXCEPTION(SYS_SHAREABILITY_FAULT),
336 PANFROST_EXCEPTION(GPU_CACHEABILITY_FAULT),
337 PANFROST_EXCEPTION(TRANSLATION_FAULT_0),
338 PANFROST_EXCEPTION(TRANSLATION_FAULT_1),
339 PANFROST_EXCEPTION(TRANSLATION_FAULT_2),
340 PANFROST_EXCEPTION(TRANSLATION_FAULT_3),
341 PANFROST_EXCEPTION(TRANSLATION_FAULT_4),
342 PANFROST_EXCEPTION(TRANSLATION_FAULT_IDENTITY),
343 PANFROST_EXCEPTION(PERM_FAULT_0),
344 PANFROST_EXCEPTION(PERM_FAULT_1),
345 PANFROST_EXCEPTION(PERM_FAULT_2),
346 PANFROST_EXCEPTION(PERM_FAULT_3),
347 PANFROST_EXCEPTION(TRANSTAB_BUS_FAULT_0),
348 PANFROST_EXCEPTION(TRANSTAB_BUS_FAULT_1),
349 PANFROST_EXCEPTION(TRANSTAB_BUS_FAULT_2),
350 PANFROST_EXCEPTION(TRANSTAB_BUS_FAULT_3),
351 PANFROST_EXCEPTION(ACCESS_FLAG_0),
352 PANFROST_EXCEPTION(ACCESS_FLAG_1),
353 PANFROST_EXCEPTION(ACCESS_FLAG_2),
354 PANFROST_EXCEPTION(ACCESS_FLAG_3),
355 PANFROST_EXCEPTION(ADDR_SIZE_FAULT_IN0),
356 PANFROST_EXCEPTION(ADDR_SIZE_FAULT_IN1),
357 PANFROST_EXCEPTION(ADDR_SIZE_FAULT_IN2),
358 PANFROST_EXCEPTION(ADDR_SIZE_FAULT_IN3),
359 PANFROST_EXCEPTION(ADDR_SIZE_FAULT_OUT0),
360 PANFROST_EXCEPTION(ADDR_SIZE_FAULT_OUT1),
361 PANFROST_EXCEPTION(ADDR_SIZE_FAULT_OUT2),
362 PANFROST_EXCEPTION(ADDR_SIZE_FAULT_OUT3),
363 PANFROST_EXCEPTION(MEM_ATTR_FAULT_0),
364 PANFROST_EXCEPTION(MEM_ATTR_FAULT_1),
365 PANFROST_EXCEPTION(MEM_ATTR_FAULT_2),
366 PANFROST_EXCEPTION(MEM_ATTR_FAULT_3),
367 PANFROST_EXCEPTION(MEM_ATTR_NONCACHE_0),
368 PANFROST_EXCEPTION(MEM_ATTR_NONCACHE_1),
369 PANFROST_EXCEPTION(MEM_ATTR_NONCACHE_2),
370 PANFROST_EXCEPTION(MEM_ATTR_NONCACHE_3),
371};
372
373const char *panfrost_exception_name(u32 exception_code)
374{
375 if (WARN_ON(exception_code >= ARRAY_SIZE(panfrost_exception_infos) ||
376 !panfrost_exception_infos[exception_code].name))
377 return "Unknown exception type";
378
379 return panfrost_exception_infos[exception_code].name;
380}
381
382bool panfrost_exception_needs_reset(const struct panfrost_device *pfdev,
383 u32 exception_code)
384{
385
386
387
388 return false;
389}
390
391void panfrost_device_reset(struct panfrost_device *pfdev)
392{
393 panfrost_gpu_soft_reset(pfdev);
394
395 panfrost_gpu_power_on(pfdev);
396 panfrost_mmu_reset(pfdev);
397 panfrost_job_enable_interrupts(pfdev);
398}
399
400#ifdef CONFIG_PM
401int panfrost_device_resume(struct device *dev)
402{
403 struct platform_device *pdev = to_platform_device(dev);
404 struct panfrost_device *pfdev = platform_get_drvdata(pdev);
405
406 panfrost_device_reset(pfdev);
407 panfrost_devfreq_resume(pfdev);
408
409 return 0;
410}
411
412int panfrost_device_suspend(struct device *dev)
413{
414 struct platform_device *pdev = to_platform_device(dev);
415 struct panfrost_device *pfdev = platform_get_drvdata(pdev);
416
417 if (!panfrost_job_is_idle(pfdev))
418 return -EBUSY;
419
420 panfrost_devfreq_suspend(pfdev);
421 panfrost_gpu_power_off(pfdev);
422
423 return 0;
424}
425#endif
426
