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35#include <linux/module.h>
36#include <linux/device.h>
37#include <linux/kernel.h>
38#include <linux/cpu.h>
39#include <linux/stringify.h>
40#include <asm/spu.h>
41#include <asm/io.h>
42#include <asm/prom.h>
43#include <asm/cell-regs.h>
44
45#include "spu_priv1_mmio.h"
46
47#define TEMP_MIN 65
48#define TEMP_MAX 125
49
50#define DEVICE_PREFIX_ATTR(_prefix,_name,_mode) \
51struct device_attribute attr_ ## _prefix ## _ ## _name = { \
52 .attr = { .name = __stringify(_name), .mode = _mode }, \
53 .show = _prefix ## _show_ ## _name, \
54 .store = _prefix ## _store_ ## _name, \
55};
56
57static inline u8 reg_to_temp(u8 reg_value)
58{
59 return ((reg_value & 0x3f) << 1) + TEMP_MIN;
60}
61
62static inline u8 temp_to_reg(u8 temp)
63{
64 return ((temp - TEMP_MIN) >> 1) & 0x3f;
65}
66
67static struct cbe_pmd_regs __iomem *get_pmd_regs(struct device *dev)
68{
69 struct spu *spu;
70
71 spu = container_of(dev, struct spu, dev);
72
73 return cbe_get_pmd_regs(spu_devnode(spu));
74}
75
76
77static u8 spu_read_register_value(struct device *dev, union spe_reg __iomem *reg)
78{
79 union spe_reg value;
80 struct spu *spu;
81
82 spu = container_of(dev, struct spu, dev);
83 value.val = in_be64(®->val);
84
85 return value.spe[spu->spe_id];
86}
87
88static ssize_t spu_show_temp(struct device *dev, struct device_attribute *attr,
89 char *buf)
90{
91 u8 value;
92 struct cbe_pmd_regs __iomem *pmd_regs;
93
94 pmd_regs = get_pmd_regs(dev);
95
96 value = spu_read_register_value(dev, &pmd_regs->ts_ctsr1);
97
98 return sprintf(buf, "%d\n", reg_to_temp(value));
99}
100
101static ssize_t show_throttle(struct cbe_pmd_regs __iomem *pmd_regs, char *buf, int pos)
102{
103 u64 value;
104
105 value = in_be64(&pmd_regs->tm_tpr.val);
106
107 value >>= pos;
108 value &= 0x3F;
109
110 return sprintf(buf, "%d\n", reg_to_temp(value));
111}
112
113static ssize_t store_throttle(struct cbe_pmd_regs __iomem *pmd_regs, const char *buf, size_t size, int pos)
114{
115 u64 reg_value;
116 unsigned int temp;
117 u64 new_value;
118 int ret;
119
120 ret = sscanf(buf, "%u", &temp);
121
122 if (ret != 1 || temp < TEMP_MIN || temp > TEMP_MAX)
123 return -EINVAL;
124
125 new_value = temp_to_reg(temp);
126
127 reg_value = in_be64(&pmd_regs->tm_tpr.val);
128
129
130 reg_value &= ~(0xffull << pos);
131
132 reg_value |= new_value << pos;
133
134 out_be64(&pmd_regs->tm_tpr.val, reg_value);
135 return size;
136}
137
138static ssize_t spu_show_throttle_end(struct device *dev,
139 struct device_attribute *attr, char *buf)
140{
141 return show_throttle(get_pmd_regs(dev), buf, 0);
142}
143
144static ssize_t spu_show_throttle_begin(struct device *dev,
145 struct device_attribute *attr, char *buf)
146{
147 return show_throttle(get_pmd_regs(dev), buf, 8);
148}
149
150static ssize_t spu_show_throttle_full_stop(struct device *dev,
151 struct device_attribute *attr, char *buf)
152{
153 return show_throttle(get_pmd_regs(dev), buf, 16);
154}
155
156static ssize_t spu_store_throttle_end(struct device *dev,
157 struct device_attribute *attr, const char *buf, size_t size)
158{
159 return store_throttle(get_pmd_regs(dev), buf, size, 0);
160}
161
162static ssize_t spu_store_throttle_begin(struct device *dev,
163 struct device_attribute *attr, const char *buf, size_t size)
164{
165 return store_throttle(get_pmd_regs(dev), buf, size, 8);
166}
167
168static ssize_t spu_store_throttle_full_stop(struct device *dev,
169 struct device_attribute *attr, const char *buf, size_t size)
170{
171 return store_throttle(get_pmd_regs(dev), buf, size, 16);
172}
173
174static ssize_t ppe_show_temp(struct device *dev, char *buf, int pos)
175{
176 struct cbe_pmd_regs __iomem *pmd_regs;
177 u64 value;
178
179 pmd_regs = cbe_get_cpu_pmd_regs(dev->id);
180 value = in_be64(&pmd_regs->ts_ctsr2);
181
182 value = (value >> pos) & 0x3f;
183
184 return sprintf(buf, "%d\n", reg_to_temp(value));
185}
186
187
188
189
190static ssize_t ppe_show_temp0(struct device *dev,
191 struct device_attribute *attr, char *buf)
192{
193 return ppe_show_temp(dev, buf, 32);
194}
195
196
197static ssize_t ppe_show_temp1(struct device *dev,
198 struct device_attribute *attr, char *buf)
199{
200 return ppe_show_temp(dev, buf, 0);
201}
202
203static ssize_t ppe_show_throttle_end(struct device *dev,
204 struct device_attribute *attr, char *buf)
205{
206 return show_throttle(cbe_get_cpu_pmd_regs(dev->id), buf, 32);
207}
208
209static ssize_t ppe_show_throttle_begin(struct device *dev,
210 struct device_attribute *attr, char *buf)
211{
212 return show_throttle(cbe_get_cpu_pmd_regs(dev->id), buf, 40);
213}
214
215static ssize_t ppe_show_throttle_full_stop(struct device *dev,
216 struct device_attribute *attr, char *buf)
217{
218 return show_throttle(cbe_get_cpu_pmd_regs(dev->id), buf, 48);
219}
220
221static ssize_t ppe_store_throttle_end(struct device *dev,
222 struct device_attribute *attr, const char *buf, size_t size)
223{
224 return store_throttle(cbe_get_cpu_pmd_regs(dev->id), buf, size, 32);
225}
226
227static ssize_t ppe_store_throttle_begin(struct device *dev,
228 struct device_attribute *attr, const char *buf, size_t size)
229{
230 return store_throttle(cbe_get_cpu_pmd_regs(dev->id), buf, size, 40);
231}
232
233static ssize_t ppe_store_throttle_full_stop(struct device *dev,
234 struct device_attribute *attr, const char *buf, size_t size)
235{
236 return store_throttle(cbe_get_cpu_pmd_regs(dev->id), buf, size, 48);
237}
238
239
240static struct device_attribute attr_spu_temperature = {
241 .attr = {.name = "temperature", .mode = 0400 },
242 .show = spu_show_temp,
243};
244
245static DEVICE_PREFIX_ATTR(spu, throttle_end, 0600);
246static DEVICE_PREFIX_ATTR(spu, throttle_begin, 0600);
247static DEVICE_PREFIX_ATTR(spu, throttle_full_stop, 0600);
248
249
250static struct attribute *spu_attributes[] = {
251 &attr_spu_temperature.attr,
252 &attr_spu_throttle_end.attr,
253 &attr_spu_throttle_begin.attr,
254 &attr_spu_throttle_full_stop.attr,
255 NULL,
256};
257
258static struct attribute_group spu_attribute_group = {
259 .name = "thermal",
260 .attrs = spu_attributes,
261};
262
263static struct device_attribute attr_ppe_temperature0 = {
264 .attr = {.name = "temperature0", .mode = 0400 },
265 .show = ppe_show_temp0,
266};
267
268static struct device_attribute attr_ppe_temperature1 = {
269 .attr = {.name = "temperature1", .mode = 0400 },
270 .show = ppe_show_temp1,
271};
272
273static DEVICE_PREFIX_ATTR(ppe, throttle_end, 0600);
274static DEVICE_PREFIX_ATTR(ppe, throttle_begin, 0600);
275static DEVICE_PREFIX_ATTR(ppe, throttle_full_stop, 0600);
276
277static struct attribute *ppe_attributes[] = {
278 &attr_ppe_temperature0.attr,
279 &attr_ppe_temperature1.attr,
280 &attr_ppe_throttle_end.attr,
281 &attr_ppe_throttle_begin.attr,
282 &attr_ppe_throttle_full_stop.attr,
283 NULL,
284};
285
286static struct attribute_group ppe_attribute_group = {
287 .name = "thermal",
288 .attrs = ppe_attributes,
289};
290
291
292
293
294static int __init init_default_values(void)
295{
296 int cpu;
297 struct cbe_pmd_regs __iomem *pmd_regs;
298 struct device *dev;
299 union ppe_spe_reg tpr;
300 union spe_reg str1;
301 u64 str2;
302 union spe_reg cr1;
303 u64 cr2;
304
305
306
307
308
309
310 tpr.ppe = 0x1F0803;
311
312
313
314
315
316 tpr.spe = 0x100803;
317
318
319
320
321
322 str1.val = 0x1010101010101010ull;
323
324
325
326 str2 = 0x10;
327
328
329
330
331
332 cr1.val = 0x0404040404040404ull;
333
334
335
336 cr2 = 0x04;
337
338 for_each_possible_cpu (cpu) {
339 pr_debug("processing cpu %d\n", cpu);
340 dev = get_cpu_device(cpu);
341
342 if (!dev) {
343 pr_info("invalid dev pointer for cbe_thermal\n");
344 return -EINVAL;
345 }
346
347 pmd_regs = cbe_get_cpu_pmd_regs(dev->id);
348
349 if (!pmd_regs) {
350 pr_info("invalid CBE regs pointer for cbe_thermal\n");
351 return -EINVAL;
352 }
353
354 out_be64(&pmd_regs->tm_str2, str2);
355 out_be64(&pmd_regs->tm_str1.val, str1.val);
356 out_be64(&pmd_regs->tm_tpr.val, tpr.val);
357 out_be64(&pmd_regs->tm_cr1.val, cr1.val);
358 out_be64(&pmd_regs->tm_cr2, cr2);
359 }
360
361 return 0;
362}
363
364
365static int __init thermal_init(void)
366{
367 int rc = init_default_values();
368
369 if (rc == 0) {
370 spu_add_dev_attr_group(&spu_attribute_group);
371 cpu_add_dev_attr_group(&ppe_attribute_group);
372 }
373
374 return rc;
375}
376module_init(thermal_init);
377
378static void __exit thermal_exit(void)
379{
380 spu_remove_dev_attr_group(&spu_attribute_group);
381 cpu_remove_dev_attr_group(&ppe_attribute_group);
382}
383module_exit(thermal_exit);
384
385MODULE_LICENSE("GPL");
386MODULE_AUTHOR("Christian Krafft <krafft@de.ibm.com>");
387
388