This source file includes following definitions.
- panfrost_reset_init
- panfrost_reset_fini
- panfrost_clk_init
- panfrost_clk_fini
- panfrost_regulator_init
- panfrost_regulator_fini
- panfrost_device_init
- panfrost_device_fini
- panfrost_exception_name
- panfrost_device_reset
- panfrost_device_resume
- panfrost_device_suspend
1
2
3
4
5 #include <linux/clk.h>
6 #include <linux/reset.h>
7 #include <linux/platform_device.h>
8 #include <linux/regulator/consumer.h>
9
10 #include "panfrost_device.h"
11 #include "panfrost_devfreq.h"
12 #include "panfrost_features.h"
13 #include "panfrost_gpu.h"
14 #include "panfrost_job.h"
15 #include "panfrost_mmu.h"
16 #include "panfrost_perfcnt.h"
17
18 static int panfrost_reset_init(struct panfrost_device *pfdev)
19 {
20 int err;
21
22 pfdev->rstc = devm_reset_control_array_get(pfdev->dev, false, true);
23 if (IS_ERR(pfdev->rstc)) {
24 dev_err(pfdev->dev, "get reset failed %ld\n", PTR_ERR(pfdev->rstc));
25 return PTR_ERR(pfdev->rstc);
26 }
27
28 err = reset_control_deassert(pfdev->rstc);
29 if (err)
30 return err;
31
32 return 0;
33 }
34
35 static void panfrost_reset_fini(struct panfrost_device *pfdev)
36 {
37 reset_control_assert(pfdev->rstc);
38 }
39
40 static int panfrost_clk_init(struct panfrost_device *pfdev)
41 {
42 int err;
43 unsigned long rate;
44
45 pfdev->clock = devm_clk_get(pfdev->dev, NULL);
46 if (IS_ERR(pfdev->clock)) {
47 dev_err(pfdev->dev, "get clock failed %ld\n", PTR_ERR(pfdev->clock));
48 return PTR_ERR(pfdev->clock);
49 }
50
51 rate = clk_get_rate(pfdev->clock);
52 dev_info(pfdev->dev, "clock rate = %lu\n", rate);
53
54 err = clk_prepare_enable(pfdev->clock);
55 if (err)
56 return err;
57
58 pfdev->bus_clock = devm_clk_get_optional(pfdev->dev, "bus");
59 if (IS_ERR(pfdev->bus_clock)) {
60 dev_err(pfdev->dev, "get bus_clock failed %ld\n",
61 PTR_ERR(pfdev->bus_clock));
62 return PTR_ERR(pfdev->bus_clock);
63 }
64
65 if (pfdev->bus_clock) {
66 rate = clk_get_rate(pfdev->bus_clock);
67 dev_info(pfdev->dev, "bus_clock rate = %lu\n", rate);
68
69 err = clk_prepare_enable(pfdev->bus_clock);
70 if (err)
71 goto disable_clock;
72 }
73
74 return 0;
75
76 disable_clock:
77 clk_disable_unprepare(pfdev->clock);
78
79 return err;
80 }
81
82 static void panfrost_clk_fini(struct panfrost_device *pfdev)
83 {
84 clk_disable_unprepare(pfdev->bus_clock);
85 clk_disable_unprepare(pfdev->clock);
86 }
87
88 static int panfrost_regulator_init(struct panfrost_device *pfdev)
89 {
90 int ret;
91
92 pfdev->regulator = devm_regulator_get(pfdev->dev, "mali");
93 if (IS_ERR(pfdev->regulator)) {
94 ret = PTR_ERR(pfdev->regulator);
95 dev_err(pfdev->dev, "failed to get regulator: %d\n", ret);
96 return ret;
97 }
98
99 ret = regulator_enable(pfdev->regulator);
100 if (ret < 0) {
101 dev_err(pfdev->dev, "failed to enable regulator: %d\n", ret);
102 return ret;
103 }
104
105 return 0;
106 }
107
108 static void panfrost_regulator_fini(struct panfrost_device *pfdev)
109 {
110 regulator_disable(pfdev->regulator);
111 }
112
113 int panfrost_device_init(struct panfrost_device *pfdev)
114 {
115 int err;
116 struct resource *res;
117
118 mutex_init(&pfdev->sched_lock);
119 mutex_init(&pfdev->reset_lock);
120 INIT_LIST_HEAD(&pfdev->scheduled_jobs);
121 INIT_LIST_HEAD(&pfdev->as_lru_list);
122
123 spin_lock_init(&pfdev->as_lock);
124
125 err = panfrost_clk_init(pfdev);
126 if (err) {
127 dev_err(pfdev->dev, "clk init failed %d\n", err);
128 return err;
129 }
130
131 err = panfrost_regulator_init(pfdev);
132 if (err) {
133 dev_err(pfdev->dev, "regulator init failed %d\n", err);
134 goto err_out0;
135 }
136
137 err = panfrost_reset_init(pfdev);
138 if (err) {
139 dev_err(pfdev->dev, "reset init failed %d\n", err);
140 goto err_out1;
141 }
142
143 res = platform_get_resource(pfdev->pdev, IORESOURCE_MEM, 0);
144 pfdev->iomem = devm_ioremap_resource(pfdev->dev, res);
145 if (IS_ERR(pfdev->iomem)) {
146 dev_err(pfdev->dev, "failed to ioremap iomem\n");
147 err = PTR_ERR(pfdev->iomem);
148 goto err_out2;
149 }
150
151 err = panfrost_gpu_init(pfdev);
152 if (err)
153 goto err_out2;
154
155 err = panfrost_mmu_init(pfdev);
156 if (err)
157 goto err_out3;
158
159 err = panfrost_job_init(pfdev);
160 if (err)
161 goto err_out4;
162
163 err = panfrost_perfcnt_init(pfdev);
164 if (err)
165 goto err_out5;
166
167 return 0;
168 err_out5:
169 panfrost_job_fini(pfdev);
170 err_out4:
171 panfrost_mmu_fini(pfdev);
172 err_out3:
173 panfrost_gpu_fini(pfdev);
174 err_out2:
175 panfrost_reset_fini(pfdev);
176 err_out1:
177 panfrost_regulator_fini(pfdev);
178 err_out0:
179 panfrost_clk_fini(pfdev);
180 return err;
181 }
182
183 void panfrost_device_fini(struct panfrost_device *pfdev)
184 {
185 panfrost_perfcnt_fini(pfdev);
186 panfrost_job_fini(pfdev);
187 panfrost_mmu_fini(pfdev);
188 panfrost_gpu_fini(pfdev);
189 panfrost_reset_fini(pfdev);
190 panfrost_regulator_fini(pfdev);
191 panfrost_clk_fini(pfdev);
192 }
193
194 const char *panfrost_exception_name(struct panfrost_device *pfdev, u32 exception_code)
195 {
196 switch (exception_code) {
197
198 case 0x00: return "NOT_STARTED/IDLE/OK";
199 case 0x01: return "DONE";
200 case 0x02: return "INTERRUPTED";
201 case 0x03: return "STOPPED";
202 case 0x04: return "TERMINATED";
203 case 0x08: return "ACTIVE";
204
205 case 0x40: return "JOB_CONFIG_FAULT";
206 case 0x41: return "JOB_POWER_FAULT";
207 case 0x42: return "JOB_READ_FAULT";
208 case 0x43: return "JOB_WRITE_FAULT";
209 case 0x44: return "JOB_AFFINITY_FAULT";
210 case 0x48: return "JOB_BUS_FAULT";
211 case 0x50: return "INSTR_INVALID_PC";
212 case 0x51: return "INSTR_INVALID_ENC";
213 case 0x52: return "INSTR_TYPE_MISMATCH";
214 case 0x53: return "INSTR_OPERAND_FAULT";
215 case 0x54: return "INSTR_TLS_FAULT";
216 case 0x55: return "INSTR_BARRIER_FAULT";
217 case 0x56: return "INSTR_ALIGN_FAULT";
218 case 0x58: return "DATA_INVALID_FAULT";
219 case 0x59: return "TILE_RANGE_FAULT";
220 case 0x5A: return "ADDR_RANGE_FAULT";
221 case 0x60: return "OUT_OF_MEMORY";
222
223 case 0x80: return "DELAYED_BUS_FAULT";
224 case 0x88: return "SHAREABILITY_FAULT";
225
226 case 0xC1: return "TRANSLATION_FAULT_LEVEL1";
227 case 0xC2: return "TRANSLATION_FAULT_LEVEL2";
228 case 0xC3: return "TRANSLATION_FAULT_LEVEL3";
229 case 0xC4: return "TRANSLATION_FAULT_LEVEL4";
230 case 0xC8: return "PERMISSION_FAULT";
231 case 0xC9 ... 0xCF: return "PERMISSION_FAULT";
232 case 0xD1: return "TRANSTAB_BUS_FAULT_LEVEL1";
233 case 0xD2: return "TRANSTAB_BUS_FAULT_LEVEL2";
234 case 0xD3: return "TRANSTAB_BUS_FAULT_LEVEL3";
235 case 0xD4: return "TRANSTAB_BUS_FAULT_LEVEL4";
236 case 0xD8: return "ACCESS_FLAG";
237 case 0xD9 ... 0xDF: return "ACCESS_FLAG";
238 case 0xE0 ... 0xE7: return "ADDRESS_SIZE_FAULT";
239 case 0xE8 ... 0xEF: return "MEMORY_ATTRIBUTES_FAULT";
240 }
241
242 return "UNKNOWN";
243 }
244
245 void panfrost_device_reset(struct panfrost_device *pfdev)
246 {
247 panfrost_gpu_soft_reset(pfdev);
248
249 panfrost_gpu_power_on(pfdev);
250 panfrost_mmu_reset(pfdev);
251 panfrost_job_enable_interrupts(pfdev);
252 }
253
254 #ifdef CONFIG_PM
255 int panfrost_device_resume(struct device *dev)
256 {
257 struct platform_device *pdev = to_platform_device(dev);
258 struct panfrost_device *pfdev = platform_get_drvdata(pdev);
259
260 panfrost_device_reset(pfdev);
261 panfrost_devfreq_resume(pfdev);
262
263 return 0;
264 }
265
266 int panfrost_device_suspend(struct device *dev)
267 {
268 struct platform_device *pdev = to_platform_device(dev);
269 struct panfrost_device *pfdev = platform_get_drvdata(pdev);
270
271 if (!panfrost_job_is_idle(pfdev))
272 return -EBUSY;
273
274 panfrost_devfreq_suspend(pfdev);
275 panfrost_gpu_power_off(pfdev);
276
277 return 0;
278 }
279 #endif