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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 int err;
22
23 pfdev->rstc = devm_reset_control_array_get(pfdev->dev, false, true);
24 if (IS_ERR(pfdev->rstc)) {
25 dev_err(pfdev->dev, "get reset failed %ld\n", PTR_ERR(pfdev->rstc));
26 return PTR_ERR(pfdev->rstc);
27 }
28
29 err = reset_control_deassert(pfdev->rstc);
30 if (err)
31 return err;
32
33 return 0;
34}
35
36static void panfrost_reset_fini(struct panfrost_device *pfdev)
37{
38 reset_control_assert(pfdev->rstc);
39}
40
41static int panfrost_clk_init(struct panfrost_device *pfdev)
42{
43 int err;
44 unsigned long rate;
45
46 pfdev->clock = devm_clk_get(pfdev->dev, NULL);
47 if (IS_ERR(pfdev->clock)) {
48 dev_err(pfdev->dev, "get clock failed %ld\n", PTR_ERR(pfdev->clock));
49 return PTR_ERR(pfdev->clock);
50 }
51
52 rate = clk_get_rate(pfdev->clock);
53 dev_info(pfdev->dev, "clock rate = %lu\n", rate);
54
55 err = clk_prepare_enable(pfdev->clock);
56 if (err)
57 return err;
58
59 pfdev->bus_clock = devm_clk_get_optional(pfdev->dev, "bus");
60 if (IS_ERR(pfdev->bus_clock)) {
61 dev_err(pfdev->dev, "get bus_clock failed %ld\n",
62 PTR_ERR(pfdev->bus_clock));
63 return PTR_ERR(pfdev->bus_clock);
64 }
65
66 if (pfdev->bus_clock) {
67 rate = clk_get_rate(pfdev->bus_clock);
68 dev_info(pfdev->dev, "bus_clock rate = %lu\n", rate);
69
70 err = clk_prepare_enable(pfdev->bus_clock);
71 if (err)
72 goto disable_clock;
73 }
74
75 return 0;
76
77disable_clock:
78 clk_disable_unprepare(pfdev->clock);
79
80 return err;
81}
82
83static void panfrost_clk_fini(struct panfrost_device *pfdev)
84{
85 clk_disable_unprepare(pfdev->bus_clock);
86 clk_disable_unprepare(pfdev->clock);
87}
88
89static int panfrost_regulator_init(struct panfrost_device *pfdev)
90{
91 int ret, i;
92
93 pfdev->regulators = devm_kcalloc(pfdev->dev, pfdev->comp->num_supplies,
94 sizeof(*pfdev->regulators),
95 GFP_KERNEL);
96 if (!pfdev->regulators)
97 return -ENOMEM;
98
99 for (i = 0; i < pfdev->comp->num_supplies; i++)
100 pfdev->regulators[i].supply = pfdev->comp->supply_names[i];
101
102 ret = devm_regulator_bulk_get(pfdev->dev,
103 pfdev->comp->num_supplies,
104 pfdev->regulators);
105 if (ret < 0) {
106 if (ret != -EPROBE_DEFER)
107 dev_err(pfdev->dev, "failed to get regulators: %d\n",
108 ret);
109 return ret;
110 }
111
112 ret = regulator_bulk_enable(pfdev->comp->num_supplies,
113 pfdev->regulators);
114 if (ret < 0) {
115 dev_err(pfdev->dev, "failed to enable regulators: %d\n", ret);
116 return ret;
117 }
118
119 return 0;
120}
121
122static void panfrost_regulator_fini(struct panfrost_device *pfdev)
123{
124 if (!pfdev->regulators)
125 return;
126
127 regulator_bulk_disable(pfdev->comp->num_supplies, pfdev->regulators);
128}
129
130static void panfrost_pm_domain_fini(struct panfrost_device *pfdev)
131{
132 int i;
133
134 for (i = 0; i < ARRAY_SIZE(pfdev->pm_domain_devs); i++) {
135 if (!pfdev->pm_domain_devs[i])
136 break;
137
138 if (pfdev->pm_domain_links[i])
139 device_link_del(pfdev->pm_domain_links[i]);
140
141 dev_pm_domain_detach(pfdev->pm_domain_devs[i], true);
142 }
143}
144
145static int panfrost_pm_domain_init(struct panfrost_device *pfdev)
146{
147 int err;
148 int i, num_domains;
149
150 num_domains = of_count_phandle_with_args(pfdev->dev->of_node,
151 "power-domains",
152 "#power-domain-cells");
153
154
155
156
157
158 if (num_domains < 2 && pfdev->comp->num_pm_domains < 2)
159 return 0;
160
161 if (num_domains != pfdev->comp->num_pm_domains) {
162 dev_err(pfdev->dev,
163 "Incorrect number of power domains: %d provided, %d needed\n",
164 num_domains, pfdev->comp->num_pm_domains);
165 return -EINVAL;
166 }
167
168 if (WARN(num_domains > ARRAY_SIZE(pfdev->pm_domain_devs),
169 "Too many supplies in compatible structure.\n"))
170 return -EINVAL;
171
172 for (i = 0; i < num_domains; i++) {
173 pfdev->pm_domain_devs[i] =
174 dev_pm_domain_attach_by_name(pfdev->dev,
175 pfdev->comp->pm_domain_names[i]);
176 if (IS_ERR_OR_NULL(pfdev->pm_domain_devs[i])) {
177 err = PTR_ERR(pfdev->pm_domain_devs[i]) ? : -ENODATA;
178 pfdev->pm_domain_devs[i] = NULL;
179 dev_err(pfdev->dev,
180 "failed to get pm-domain %s(%d): %d\n",
181 pfdev->comp->pm_domain_names[i], i, err);
182 goto err;
183 }
184
185 pfdev->pm_domain_links[i] = device_link_add(pfdev->dev,
186 pfdev->pm_domain_devs[i], DL_FLAG_PM_RUNTIME |
187 DL_FLAG_STATELESS | DL_FLAG_RPM_ACTIVE);
188 if (!pfdev->pm_domain_links[i]) {
189 dev_err(pfdev->pm_domain_devs[i],
190 "adding device link failed!\n");
191 err = -ENODEV;
192 goto err;
193 }
194 }
195
196 return 0;
197
198err:
199 panfrost_pm_domain_fini(pfdev);
200 return err;
201}
202
203int panfrost_device_init(struct panfrost_device *pfdev)
204{
205 int err;
206 struct resource *res;
207
208 mutex_init(&pfdev->sched_lock);
209 mutex_init(&pfdev->reset_lock);
210 INIT_LIST_HEAD(&pfdev->scheduled_jobs);
211 INIT_LIST_HEAD(&pfdev->as_lru_list);
212
213 spin_lock_init(&pfdev->as_lock);
214
215 err = panfrost_clk_init(pfdev);
216 if (err) {
217 dev_err(pfdev->dev, "clk init failed %d\n", err);
218 return err;
219 }
220
221 err = panfrost_devfreq_init(pfdev);
222 if (err) {
223 if (err != -EPROBE_DEFER)
224 dev_err(pfdev->dev, "devfreq init failed %d\n", err);
225 goto out_clk;
226 }
227
228
229 if (!pfdev->pfdevfreq.opp_of_table_added) {
230 err = panfrost_regulator_init(pfdev);
231 if (err)
232 goto out_devfreq;
233 }
234
235 err = panfrost_reset_init(pfdev);
236 if (err) {
237 dev_err(pfdev->dev, "reset init failed %d\n", err);
238 goto out_regulator;
239 }
240
241 err = panfrost_pm_domain_init(pfdev);
242 if (err)
243 goto out_reset;
244
245 res = platform_get_resource(pfdev->pdev, IORESOURCE_MEM, 0);
246 pfdev->iomem = devm_ioremap_resource(pfdev->dev, res);
247 if (IS_ERR(pfdev->iomem)) {
248 dev_err(pfdev->dev, "failed to ioremap iomem\n");
249 err = PTR_ERR(pfdev->iomem);
250 goto out_pm_domain;
251 }
252
253 err = panfrost_gpu_init(pfdev);
254 if (err)
255 goto out_pm_domain;
256
257 err = panfrost_mmu_init(pfdev);
258 if (err)
259 goto out_gpu;
260
261 err = panfrost_job_init(pfdev);
262 if (err)
263 goto out_mmu;
264
265 err = panfrost_perfcnt_init(pfdev);
266 if (err)
267 goto out_job;
268
269 return 0;
270out_job:
271 panfrost_job_fini(pfdev);
272out_mmu:
273 panfrost_mmu_fini(pfdev);
274out_gpu:
275 panfrost_gpu_fini(pfdev);
276out_pm_domain:
277 panfrost_pm_domain_fini(pfdev);
278out_reset:
279 panfrost_reset_fini(pfdev);
280out_regulator:
281 panfrost_regulator_fini(pfdev);
282out_devfreq:
283 panfrost_devfreq_fini(pfdev);
284out_clk:
285 panfrost_clk_fini(pfdev);
286 return err;
287}
288
289void panfrost_device_fini(struct panfrost_device *pfdev)
290{
291 panfrost_perfcnt_fini(pfdev);
292 panfrost_job_fini(pfdev);
293 panfrost_mmu_fini(pfdev);
294 panfrost_gpu_fini(pfdev);
295 panfrost_pm_domain_fini(pfdev);
296 panfrost_reset_fini(pfdev);
297 panfrost_devfreq_fini(pfdev);
298 panfrost_regulator_fini(pfdev);
299 panfrost_clk_fini(pfdev);
300}
301
302const char *panfrost_exception_name(struct panfrost_device *pfdev, u32 exception_code)
303{
304 switch (exception_code) {
305
306 case 0x00: return "NOT_STARTED/IDLE/OK";
307 case 0x01: return "DONE";
308 case 0x02: return "INTERRUPTED";
309 case 0x03: return "STOPPED";
310 case 0x04: return "TERMINATED";
311 case 0x08: return "ACTIVE";
312
313 case 0x40: return "JOB_CONFIG_FAULT";
314 case 0x41: return "JOB_POWER_FAULT";
315 case 0x42: return "JOB_READ_FAULT";
316 case 0x43: return "JOB_WRITE_FAULT";
317 case 0x44: return "JOB_AFFINITY_FAULT";
318 case 0x48: return "JOB_BUS_FAULT";
319 case 0x50: return "INSTR_INVALID_PC";
320 case 0x51: return "INSTR_INVALID_ENC";
321 case 0x52: return "INSTR_TYPE_MISMATCH";
322 case 0x53: return "INSTR_OPERAND_FAULT";
323 case 0x54: return "INSTR_TLS_FAULT";
324 case 0x55: return "INSTR_BARRIER_FAULT";
325 case 0x56: return "INSTR_ALIGN_FAULT";
326 case 0x58: return "DATA_INVALID_FAULT";
327 case 0x59: return "TILE_RANGE_FAULT";
328 case 0x5A: return "ADDR_RANGE_FAULT";
329 case 0x60: return "OUT_OF_MEMORY";
330
331 case 0x80: return "DELAYED_BUS_FAULT";
332 case 0x88: return "SHAREABILITY_FAULT";
333
334 case 0xC1: return "TRANSLATION_FAULT_LEVEL1";
335 case 0xC2: return "TRANSLATION_FAULT_LEVEL2";
336 case 0xC3: return "TRANSLATION_FAULT_LEVEL3";
337 case 0xC4: return "TRANSLATION_FAULT_LEVEL4";
338 case 0xC8: return "PERMISSION_FAULT";
339 case 0xC9 ... 0xCF: return "PERMISSION_FAULT";
340 case 0xD1: return "TRANSTAB_BUS_FAULT_LEVEL1";
341 case 0xD2: return "TRANSTAB_BUS_FAULT_LEVEL2";
342 case 0xD3: return "TRANSTAB_BUS_FAULT_LEVEL3";
343 case 0xD4: return "TRANSTAB_BUS_FAULT_LEVEL4";
344 case 0xD8: return "ACCESS_FLAG";
345 case 0xD9 ... 0xDF: return "ACCESS_FLAG";
346 case 0xE0 ... 0xE7: return "ADDRESS_SIZE_FAULT";
347 case 0xE8 ... 0xEF: return "MEMORY_ATTRIBUTES_FAULT";
348 }
349
350 return "UNKNOWN";
351}
352
353void panfrost_device_reset(struct panfrost_device *pfdev)
354{
355 panfrost_gpu_soft_reset(pfdev);
356
357 panfrost_gpu_power_on(pfdev);
358 panfrost_mmu_reset(pfdev);
359 panfrost_job_enable_interrupts(pfdev);
360}
361
362#ifdef CONFIG_PM
363int panfrost_device_resume(struct device *dev)
364{
365 struct platform_device *pdev = to_platform_device(dev);
366 struct panfrost_device *pfdev = platform_get_drvdata(pdev);
367
368 panfrost_device_reset(pfdev);
369 panfrost_devfreq_resume(pfdev);
370
371 return 0;
372}
373
374int panfrost_device_suspend(struct device *dev)
375{
376 struct platform_device *pdev = to_platform_device(dev);
377 struct panfrost_device *pfdev = platform_get_drvdata(pdev);
378
379 if (!panfrost_job_is_idle(pfdev))
380 return -EBUSY;
381
382 panfrost_devfreq_suspend(pfdev);
383 panfrost_gpu_power_off(pfdev);
384
385 return 0;
386}
387#endif
388
