1 // SPDX-License-Identifier: GPL-2.0
2
3 /*
4 * Copyright 2016-2019 HabanaLabs, Ltd.
5 * All Rights Reserved.
6 */
7
8 #include "habanalabs.h"
9
10 #include <linux/pci.h>
11 #include <linux/hwmon.h>
12
13 #define SENSORS_PKT_TIMEOUT 1000000 /* 1s */
14 #define HWMON_NR_SENSOR_TYPES (hwmon_pwm + 1)
15
hl_build_hwmon_channel_info(struct hl_device * hdev,struct armcp_sensor * sensors_arr)16 int hl_build_hwmon_channel_info(struct hl_device *hdev,
17 struct armcp_sensor *sensors_arr)
18 {
19 u32 counts[HWMON_NR_SENSOR_TYPES] = {0};
20 u32 *sensors_by_type[HWMON_NR_SENSOR_TYPES] = {NULL};
21 u32 sensors_by_type_next_index[HWMON_NR_SENSOR_TYPES] = {0};
22 struct hwmon_channel_info **channels_info;
23 u32 num_sensors_for_type, num_active_sensor_types = 0,
24 arr_size = 0, *curr_arr;
25 enum hwmon_sensor_types type;
26 int rc, i, j;
27
28 for (i = 0 ; i < ARMCP_MAX_SENSORS ; i++) {
29 type = le32_to_cpu(sensors_arr[i].type);
30
31 if ((type == 0) && (sensors_arr[i].flags == 0))
32 break;
33
34 if (type >= HWMON_NR_SENSOR_TYPES) {
35 dev_err(hdev->dev,
36 "Got wrong sensor type %d from device\n", type);
37 return -EINVAL;
38 }
39
40 counts[type]++;
41 arr_size++;
42 }
43
44 for (i = 0 ; i < HWMON_NR_SENSOR_TYPES ; i++) {
45 if (counts[i] == 0)
46 continue;
47
48 num_sensors_for_type = counts[i] + 1;
49 curr_arr = kcalloc(num_sensors_for_type, sizeof(*curr_arr),
50 GFP_KERNEL);
51 if (!curr_arr) {
52 rc = -ENOMEM;
53 goto sensors_type_err;
54 }
55
56 num_active_sensor_types++;
57 sensors_by_type[i] = curr_arr;
58 }
59
60 for (i = 0 ; i < arr_size ; i++) {
61 type = le32_to_cpu(sensors_arr[i].type);
62 curr_arr = sensors_by_type[type];
63 curr_arr[sensors_by_type_next_index[type]++] =
64 le32_to_cpu(sensors_arr[i].flags);
65 }
66
67 channels_info = kcalloc(num_active_sensor_types + 1,
68 sizeof(*channels_info), GFP_KERNEL);
69 if (!channels_info) {
70 rc = -ENOMEM;
71 goto channels_info_array_err;
72 }
73
74 for (i = 0 ; i < num_active_sensor_types ; i++) {
75 channels_info[i] = kzalloc(sizeof(*channels_info[i]),
76 GFP_KERNEL);
77 if (!channels_info[i]) {
78 rc = -ENOMEM;
79 goto channel_info_err;
80 }
81 }
82
83 for (i = 0, j = 0 ; i < HWMON_NR_SENSOR_TYPES ; i++) {
84 if (!sensors_by_type[i])
85 continue;
86
87 channels_info[j]->type = i;
88 channels_info[j]->config = sensors_by_type[i];
89 j++;
90 }
91
92 hdev->hl_chip_info->info =
93 (const struct hwmon_channel_info **)channels_info;
94
95 return 0;
96
97 channel_info_err:
98 for (i = 0 ; i < num_active_sensor_types ; i++)
99 if (channels_info[i]) {
100 kfree(channels_info[i]->config);
101 kfree(channels_info[i]);
102 }
103 kfree(channels_info);
104 channels_info_array_err:
105 sensors_type_err:
106 for (i = 0 ; i < HWMON_NR_SENSOR_TYPES ; i++)
107 kfree(sensors_by_type[i]);
108
109 return rc;
110 }
111
hl_read(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,long * val)112 static int hl_read(struct device *dev, enum hwmon_sensor_types type,
113 u32 attr, int channel, long *val)
114 {
115 struct hl_device *hdev = dev_get_drvdata(dev);
116
117 if (hl_device_disabled_or_in_reset(hdev))
118 return -ENODEV;
119
120 switch (type) {
121 case hwmon_temp:
122 switch (attr) {
123 case hwmon_temp_input:
124 case hwmon_temp_max:
125 case hwmon_temp_crit:
126 case hwmon_temp_max_hyst:
127 case hwmon_temp_crit_hyst:
128 break;
129 default:
130 return -EINVAL;
131 }
132
133 *val = hl_get_temperature(hdev, channel, attr);
134 break;
135 case hwmon_in:
136 switch (attr) {
137 case hwmon_in_input:
138 case hwmon_in_min:
139 case hwmon_in_max:
140 break;
141 default:
142 return -EINVAL;
143 }
144
145 *val = hl_get_voltage(hdev, channel, attr);
146 break;
147 case hwmon_curr:
148 switch (attr) {
149 case hwmon_curr_input:
150 case hwmon_curr_min:
151 case hwmon_curr_max:
152 break;
153 default:
154 return -EINVAL;
155 }
156
157 *val = hl_get_current(hdev, channel, attr);
158 break;
159 case hwmon_fan:
160 switch (attr) {
161 case hwmon_fan_input:
162 case hwmon_fan_min:
163 case hwmon_fan_max:
164 break;
165 default:
166 return -EINVAL;
167 }
168 *val = hl_get_fan_speed(hdev, channel, attr);
169 break;
170 case hwmon_pwm:
171 switch (attr) {
172 case hwmon_pwm_input:
173 case hwmon_pwm_enable:
174 break;
175 default:
176 return -EINVAL;
177 }
178 *val = hl_get_pwm_info(hdev, channel, attr);
179 break;
180 default:
181 return -EINVAL;
182 }
183 return 0;
184 }
185
hl_write(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,long val)186 static int hl_write(struct device *dev, enum hwmon_sensor_types type,
187 u32 attr, int channel, long val)
188 {
189 struct hl_device *hdev = dev_get_drvdata(dev);
190
191 if (hl_device_disabled_or_in_reset(hdev))
192 return -ENODEV;
193
194 switch (type) {
195 case hwmon_pwm:
196 switch (attr) {
197 case hwmon_pwm_input:
198 case hwmon_pwm_enable:
199 break;
200 default:
201 return -EINVAL;
202 }
203 hl_set_pwm_info(hdev, channel, attr, val);
204 break;
205 default:
206 return -EINVAL;
207 }
208 return 0;
209 }
210
hl_is_visible(const void * data,enum hwmon_sensor_types type,u32 attr,int channel)211 static umode_t hl_is_visible(const void *data, enum hwmon_sensor_types type,
212 u32 attr, int channel)
213 {
214 switch (type) {
215 case hwmon_temp:
216 switch (attr) {
217 case hwmon_temp_input:
218 case hwmon_temp_max:
219 case hwmon_temp_max_hyst:
220 case hwmon_temp_crit:
221 case hwmon_temp_crit_hyst:
222 return 0444;
223 }
224 break;
225 case hwmon_in:
226 switch (attr) {
227 case hwmon_in_input:
228 case hwmon_in_min:
229 case hwmon_in_max:
230 return 0444;
231 }
232 break;
233 case hwmon_curr:
234 switch (attr) {
235 case hwmon_curr_input:
236 case hwmon_curr_min:
237 case hwmon_curr_max:
238 return 0444;
239 }
240 break;
241 case hwmon_fan:
242 switch (attr) {
243 case hwmon_fan_input:
244 case hwmon_fan_min:
245 case hwmon_fan_max:
246 return 0444;
247 }
248 break;
249 case hwmon_pwm:
250 switch (attr) {
251 case hwmon_pwm_input:
252 case hwmon_pwm_enable:
253 return 0644;
254 }
255 break;
256 default:
257 break;
258 }
259 return 0;
260 }
261
262 static const struct hwmon_ops hl_hwmon_ops = {
263 .is_visible = hl_is_visible,
264 .read = hl_read,
265 .write = hl_write
266 };
267
hl_get_temperature(struct hl_device * hdev,int sensor_index,u32 attr)268 long hl_get_temperature(struct hl_device *hdev, int sensor_index, u32 attr)
269 {
270 struct armcp_packet pkt;
271 long result;
272 int rc;
273
274 memset(&pkt, 0, sizeof(pkt));
275
276 pkt.ctl = cpu_to_le32(ARMCP_PACKET_TEMPERATURE_GET <<
277 ARMCP_PKT_CTL_OPCODE_SHIFT);
278 pkt.sensor_index = __cpu_to_le16(sensor_index);
279 pkt.type = __cpu_to_le16(attr);
280
281 rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
282 SENSORS_PKT_TIMEOUT, &result);
283
284 if (rc) {
285 dev_err(hdev->dev,
286 "Failed to get temperature from sensor %d, error %d\n",
287 sensor_index, rc);
288 result = 0;
289 }
290
291 return result;
292 }
293
hl_get_voltage(struct hl_device * hdev,int sensor_index,u32 attr)294 long hl_get_voltage(struct hl_device *hdev, int sensor_index, u32 attr)
295 {
296 struct armcp_packet pkt;
297 long result;
298 int rc;
299
300 memset(&pkt, 0, sizeof(pkt));
301
302 pkt.ctl = cpu_to_le32(ARMCP_PACKET_VOLTAGE_GET <<
303 ARMCP_PKT_CTL_OPCODE_SHIFT);
304 pkt.sensor_index = __cpu_to_le16(sensor_index);
305 pkt.type = __cpu_to_le16(attr);
306
307 rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
308 SENSORS_PKT_TIMEOUT, &result);
309
310 if (rc) {
311 dev_err(hdev->dev,
312 "Failed to get voltage from sensor %d, error %d\n",
313 sensor_index, rc);
314 result = 0;
315 }
316
317 return result;
318 }
319
hl_get_current(struct hl_device * hdev,int sensor_index,u32 attr)320 long hl_get_current(struct hl_device *hdev, int sensor_index, u32 attr)
321 {
322 struct armcp_packet pkt;
323 long result;
324 int rc;
325
326 memset(&pkt, 0, sizeof(pkt));
327
328 pkt.ctl = cpu_to_le32(ARMCP_PACKET_CURRENT_GET <<
329 ARMCP_PKT_CTL_OPCODE_SHIFT);
330 pkt.sensor_index = __cpu_to_le16(sensor_index);
331 pkt.type = __cpu_to_le16(attr);
332
333 rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
334 SENSORS_PKT_TIMEOUT, &result);
335
336 if (rc) {
337 dev_err(hdev->dev,
338 "Failed to get current from sensor %d, error %d\n",
339 sensor_index, rc);
340 result = 0;
341 }
342
343 return result;
344 }
345
hl_get_fan_speed(struct hl_device * hdev,int sensor_index,u32 attr)346 long hl_get_fan_speed(struct hl_device *hdev, int sensor_index, u32 attr)
347 {
348 struct armcp_packet pkt;
349 long result;
350 int rc;
351
352 memset(&pkt, 0, sizeof(pkt));
353
354 pkt.ctl = cpu_to_le32(ARMCP_PACKET_FAN_SPEED_GET <<
355 ARMCP_PKT_CTL_OPCODE_SHIFT);
356 pkt.sensor_index = __cpu_to_le16(sensor_index);
357 pkt.type = __cpu_to_le16(attr);
358
359 rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
360 SENSORS_PKT_TIMEOUT, &result);
361
362 if (rc) {
363 dev_err(hdev->dev,
364 "Failed to get fan speed from sensor %d, error %d\n",
365 sensor_index, rc);
366 result = 0;
367 }
368
369 return result;
370 }
371
hl_get_pwm_info(struct hl_device * hdev,int sensor_index,u32 attr)372 long hl_get_pwm_info(struct hl_device *hdev, int sensor_index, u32 attr)
373 {
374 struct armcp_packet pkt;
375 long result;
376 int rc;
377
378 memset(&pkt, 0, sizeof(pkt));
379
380 pkt.ctl = cpu_to_le32(ARMCP_PACKET_PWM_GET <<
381 ARMCP_PKT_CTL_OPCODE_SHIFT);
382 pkt.sensor_index = __cpu_to_le16(sensor_index);
383 pkt.type = __cpu_to_le16(attr);
384
385 rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
386 SENSORS_PKT_TIMEOUT, &result);
387
388 if (rc) {
389 dev_err(hdev->dev,
390 "Failed to get pwm info from sensor %d, error %d\n",
391 sensor_index, rc);
392 result = 0;
393 }
394
395 return result;
396 }
397
hl_set_pwm_info(struct hl_device * hdev,int sensor_index,u32 attr,long value)398 void hl_set_pwm_info(struct hl_device *hdev, int sensor_index, u32 attr,
399 long value)
400 {
401 struct armcp_packet pkt;
402 int rc;
403
404 memset(&pkt, 0, sizeof(pkt));
405
406 pkt.ctl = cpu_to_le32(ARMCP_PACKET_PWM_SET <<
407 ARMCP_PKT_CTL_OPCODE_SHIFT);
408 pkt.sensor_index = __cpu_to_le16(sensor_index);
409 pkt.type = __cpu_to_le16(attr);
410 pkt.value = cpu_to_le64(value);
411
412 rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
413 SENSORS_PKT_TIMEOUT, NULL);
414
415 if (rc)
416 dev_err(hdev->dev,
417 "Failed to set pwm info to sensor %d, error %d\n",
418 sensor_index, rc);
419 }
420
hl_hwmon_init(struct hl_device * hdev)421 int hl_hwmon_init(struct hl_device *hdev)
422 {
423 struct device *dev = hdev->pdev ? &hdev->pdev->dev : hdev->dev;
424 struct asic_fixed_properties *prop = &hdev->asic_prop;
425 int rc;
426
427 if ((hdev->hwmon_initialized) || !(hdev->fw_loading))
428 return 0;
429
430 if (hdev->hl_chip_info->info) {
431 hdev->hl_chip_info->ops = &hl_hwmon_ops;
432
433 hdev->hwmon_dev = hwmon_device_register_with_info(dev,
434 prop->armcp_info.card_name, hdev,
435 hdev->hl_chip_info, NULL);
436 if (IS_ERR(hdev->hwmon_dev)) {
437 rc = PTR_ERR(hdev->hwmon_dev);
438 dev_err(hdev->dev,
439 "Unable to register hwmon device: %d\n", rc);
440 return rc;
441 }
442
443 dev_info(hdev->dev, "%s: add sensors information\n",
444 dev_name(hdev->hwmon_dev));
445
446 hdev->hwmon_initialized = true;
447 } else {
448 dev_info(hdev->dev, "no available sensors\n");
449 }
450
451 return 0;
452 }
453
hl_hwmon_fini(struct hl_device * hdev)454 void hl_hwmon_fini(struct hl_device *hdev)
455 {
456 if (!hdev->hwmon_initialized)
457 return;
458
459 hwmon_device_unregister(hdev->hwmon_dev);
460 }
461
