xref: /openbmc/linux/drivers/ufs/core/ufs-sysfs.c (revision 7e9609d2)
1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (C) 2018 Western Digital Corporation
3 
4 #include <linux/err.h>
5 #include <linux/string.h>
6 #include <linux/bitfield.h>
7 #include <asm/unaligned.h>
8 
9 #include <ufs/ufs.h>
10 #include "ufs-sysfs.h"
11 #include "ufshcd-priv.h"
12 
ufshcd_uic_link_state_to_string(enum uic_link_state state)13 static const char *ufshcd_uic_link_state_to_string(
14 			enum uic_link_state state)
15 {
16 	switch (state) {
17 	case UIC_LINK_OFF_STATE:	return "OFF";
18 	case UIC_LINK_ACTIVE_STATE:	return "ACTIVE";
19 	case UIC_LINK_HIBERN8_STATE:	return "HIBERN8";
20 	case UIC_LINK_BROKEN_STATE:	return "BROKEN";
21 	default:			return "UNKNOWN";
22 	}
23 }
24 
ufshcd_ufs_dev_pwr_mode_to_string(enum ufs_dev_pwr_mode state)25 static const char *ufshcd_ufs_dev_pwr_mode_to_string(
26 			enum ufs_dev_pwr_mode state)
27 {
28 	switch (state) {
29 	case UFS_ACTIVE_PWR_MODE:	return "ACTIVE";
30 	case UFS_SLEEP_PWR_MODE:	return "SLEEP";
31 	case UFS_POWERDOWN_PWR_MODE:	return "POWERDOWN";
32 	case UFS_DEEPSLEEP_PWR_MODE:	return "DEEPSLEEP";
33 	default:			return "UNKNOWN";
34 	}
35 }
36 
ufs_sysfs_pm_lvl_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count,bool rpm)37 static inline ssize_t ufs_sysfs_pm_lvl_store(struct device *dev,
38 					     struct device_attribute *attr,
39 					     const char *buf, size_t count,
40 					     bool rpm)
41 {
42 	struct ufs_hba *hba = dev_get_drvdata(dev);
43 	struct ufs_dev_info *dev_info = &hba->dev_info;
44 	unsigned long flags, value;
45 
46 	if (kstrtoul(buf, 0, &value))
47 		return -EINVAL;
48 
49 	if (value >= UFS_PM_LVL_MAX)
50 		return -EINVAL;
51 
52 	if (ufs_pm_lvl_states[value].dev_state == UFS_DEEPSLEEP_PWR_MODE &&
53 	    (!(hba->caps & UFSHCD_CAP_DEEPSLEEP) ||
54 	     !(dev_info->wspecversion >= 0x310)))
55 		return -EINVAL;
56 
57 	spin_lock_irqsave(hba->host->host_lock, flags);
58 	if (rpm)
59 		hba->rpm_lvl = value;
60 	else
61 		hba->spm_lvl = value;
62 	spin_unlock_irqrestore(hba->host->host_lock, flags);
63 	return count;
64 }
65 
rpm_lvl_show(struct device * dev,struct device_attribute * attr,char * buf)66 static ssize_t rpm_lvl_show(struct device *dev,
67 		struct device_attribute *attr, char *buf)
68 {
69 	struct ufs_hba *hba = dev_get_drvdata(dev);
70 
71 	return sysfs_emit(buf, "%d\n", hba->rpm_lvl);
72 }
73 
rpm_lvl_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)74 static ssize_t rpm_lvl_store(struct device *dev,
75 		struct device_attribute *attr, const char *buf, size_t count)
76 {
77 	return ufs_sysfs_pm_lvl_store(dev, attr, buf, count, true);
78 }
79 
rpm_target_dev_state_show(struct device * dev,struct device_attribute * attr,char * buf)80 static ssize_t rpm_target_dev_state_show(struct device *dev,
81 		struct device_attribute *attr, char *buf)
82 {
83 	struct ufs_hba *hba = dev_get_drvdata(dev);
84 
85 	return sysfs_emit(buf, "%s\n", ufshcd_ufs_dev_pwr_mode_to_string(
86 			ufs_pm_lvl_states[hba->rpm_lvl].dev_state));
87 }
88 
rpm_target_link_state_show(struct device * dev,struct device_attribute * attr,char * buf)89 static ssize_t rpm_target_link_state_show(struct device *dev,
90 		struct device_attribute *attr, char *buf)
91 {
92 	struct ufs_hba *hba = dev_get_drvdata(dev);
93 
94 	return sysfs_emit(buf, "%s\n", ufshcd_uic_link_state_to_string(
95 			ufs_pm_lvl_states[hba->rpm_lvl].link_state));
96 }
97 
spm_lvl_show(struct device * dev,struct device_attribute * attr,char * buf)98 static ssize_t spm_lvl_show(struct device *dev,
99 		struct device_attribute *attr, char *buf)
100 {
101 	struct ufs_hba *hba = dev_get_drvdata(dev);
102 
103 	return sysfs_emit(buf, "%d\n", hba->spm_lvl);
104 }
105 
spm_lvl_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)106 static ssize_t spm_lvl_store(struct device *dev,
107 		struct device_attribute *attr, const char *buf, size_t count)
108 {
109 	return ufs_sysfs_pm_lvl_store(dev, attr, buf, count, false);
110 }
111 
spm_target_dev_state_show(struct device * dev,struct device_attribute * attr,char * buf)112 static ssize_t spm_target_dev_state_show(struct device *dev,
113 		struct device_attribute *attr, char *buf)
114 {
115 	struct ufs_hba *hba = dev_get_drvdata(dev);
116 
117 	return sysfs_emit(buf, "%s\n", ufshcd_ufs_dev_pwr_mode_to_string(
118 				ufs_pm_lvl_states[hba->spm_lvl].dev_state));
119 }
120 
spm_target_link_state_show(struct device * dev,struct device_attribute * attr,char * buf)121 static ssize_t spm_target_link_state_show(struct device *dev,
122 		struct device_attribute *attr, char *buf)
123 {
124 	struct ufs_hba *hba = dev_get_drvdata(dev);
125 
126 	return sysfs_emit(buf, "%s\n", ufshcd_uic_link_state_to_string(
127 				ufs_pm_lvl_states[hba->spm_lvl].link_state));
128 }
129 
130 /* Convert Auto-Hibernate Idle Timer register value to microseconds */
ufshcd_ahit_to_us(u32 ahit)131 static int ufshcd_ahit_to_us(u32 ahit)
132 {
133 	int timer = FIELD_GET(UFSHCI_AHIBERN8_TIMER_MASK, ahit);
134 	int scale = FIELD_GET(UFSHCI_AHIBERN8_SCALE_MASK, ahit);
135 
136 	for (; scale > 0; --scale)
137 		timer *= UFSHCI_AHIBERN8_SCALE_FACTOR;
138 
139 	return timer;
140 }
141 
142 /* Convert microseconds to Auto-Hibernate Idle Timer register value */
ufshcd_us_to_ahit(unsigned int timer)143 static u32 ufshcd_us_to_ahit(unsigned int timer)
144 {
145 	unsigned int scale;
146 
147 	for (scale = 0; timer > UFSHCI_AHIBERN8_TIMER_MASK; ++scale)
148 		timer /= UFSHCI_AHIBERN8_SCALE_FACTOR;
149 
150 	return FIELD_PREP(UFSHCI_AHIBERN8_TIMER_MASK, timer) |
151 	       FIELD_PREP(UFSHCI_AHIBERN8_SCALE_MASK, scale);
152 }
153 
auto_hibern8_show(struct device * dev,struct device_attribute * attr,char * buf)154 static ssize_t auto_hibern8_show(struct device *dev,
155 				 struct device_attribute *attr, char *buf)
156 {
157 	u32 ahit;
158 	int ret;
159 	struct ufs_hba *hba = dev_get_drvdata(dev);
160 
161 	if (!ufshcd_is_auto_hibern8_supported(hba))
162 		return -EOPNOTSUPP;
163 
164 	down(&hba->host_sem);
165 	if (!ufshcd_is_user_access_allowed(hba)) {
166 		ret = -EBUSY;
167 		goto out;
168 	}
169 
170 	pm_runtime_get_sync(hba->dev);
171 	ufshcd_hold(hba);
172 	ahit = ufshcd_readl(hba, REG_AUTO_HIBERNATE_IDLE_TIMER);
173 	ufshcd_release(hba);
174 	pm_runtime_put_sync(hba->dev);
175 
176 	ret = sysfs_emit(buf, "%d\n", ufshcd_ahit_to_us(ahit));
177 
178 out:
179 	up(&hba->host_sem);
180 	return ret;
181 }
182 
auto_hibern8_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)183 static ssize_t auto_hibern8_store(struct device *dev,
184 				  struct device_attribute *attr,
185 				  const char *buf, size_t count)
186 {
187 	struct ufs_hba *hba = dev_get_drvdata(dev);
188 	unsigned int timer;
189 	int ret = 0;
190 
191 	if (!ufshcd_is_auto_hibern8_supported(hba))
192 		return -EOPNOTSUPP;
193 
194 	if (kstrtouint(buf, 0, &timer))
195 		return -EINVAL;
196 
197 	if (timer > UFSHCI_AHIBERN8_MAX)
198 		return -EINVAL;
199 
200 	down(&hba->host_sem);
201 	if (!ufshcd_is_user_access_allowed(hba)) {
202 		ret = -EBUSY;
203 		goto out;
204 	}
205 
206 	ufshcd_auto_hibern8_update(hba, ufshcd_us_to_ahit(timer));
207 
208 out:
209 	up(&hba->host_sem);
210 	return ret ? ret : count;
211 }
212 
wb_on_show(struct device * dev,struct device_attribute * attr,char * buf)213 static ssize_t wb_on_show(struct device *dev, struct device_attribute *attr,
214 			  char *buf)
215 {
216 	struct ufs_hba *hba = dev_get_drvdata(dev);
217 
218 	return sysfs_emit(buf, "%d\n", hba->dev_info.wb_enabled);
219 }
220 
wb_on_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)221 static ssize_t wb_on_store(struct device *dev, struct device_attribute *attr,
222 			   const char *buf, size_t count)
223 {
224 	struct ufs_hba *hba = dev_get_drvdata(dev);
225 	unsigned int wb_enable;
226 	ssize_t res;
227 
228 	if (!ufshcd_is_wb_allowed(hba) || (ufshcd_is_clkscaling_supported(hba)
229 		&& ufshcd_enable_wb_if_scaling_up(hba))) {
230 		/*
231 		 * If the platform supports UFSHCD_CAP_CLK_SCALING, turn WB
232 		 * on/off will be done while clock scaling up/down.
233 		 */
234 		dev_warn(dev, "It is not allowed to configure WB!\n");
235 		return -EOPNOTSUPP;
236 	}
237 
238 	if (kstrtouint(buf, 0, &wb_enable))
239 		return -EINVAL;
240 
241 	if (wb_enable != 0 && wb_enable != 1)
242 		return -EINVAL;
243 
244 	down(&hba->host_sem);
245 	if (!ufshcd_is_user_access_allowed(hba)) {
246 		res = -EBUSY;
247 		goto out;
248 	}
249 
250 	ufshcd_rpm_get_sync(hba);
251 	res = ufshcd_wb_toggle(hba, wb_enable);
252 	ufshcd_rpm_put_sync(hba);
253 out:
254 	up(&hba->host_sem);
255 	return res < 0 ? res : count;
256 }
257 
enable_wb_buf_flush_show(struct device * dev,struct device_attribute * attr,char * buf)258 static ssize_t enable_wb_buf_flush_show(struct device *dev,
259 				    struct device_attribute *attr,
260 				    char *buf)
261 {
262 	struct ufs_hba *hba = dev_get_drvdata(dev);
263 
264 	return sysfs_emit(buf, "%d\n", hba->dev_info.wb_buf_flush_enabled);
265 }
266 
enable_wb_buf_flush_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)267 static ssize_t enable_wb_buf_flush_store(struct device *dev,
268 				     struct device_attribute *attr,
269 				     const char *buf, size_t count)
270 {
271 	struct ufs_hba *hba = dev_get_drvdata(dev);
272 	unsigned int enable_wb_buf_flush;
273 	ssize_t res;
274 
275 	if (!ufshcd_is_wb_buf_flush_allowed(hba)) {
276 		dev_warn(dev, "It is not allowed to configure WB buf flushing!\n");
277 		return -EOPNOTSUPP;
278 	}
279 
280 	if (kstrtouint(buf, 0, &enable_wb_buf_flush))
281 		return -EINVAL;
282 
283 	if (enable_wb_buf_flush != 0 && enable_wb_buf_flush != 1)
284 		return -EINVAL;
285 
286 	down(&hba->host_sem);
287 	if (!ufshcd_is_user_access_allowed(hba)) {
288 		res = -EBUSY;
289 		goto out;
290 	}
291 
292 	ufshcd_rpm_get_sync(hba);
293 	res = ufshcd_wb_toggle_buf_flush(hba, enable_wb_buf_flush);
294 	ufshcd_rpm_put_sync(hba);
295 
296 out:
297 	up(&hba->host_sem);
298 	return res < 0 ? res : count;
299 }
300 
wb_flush_threshold_show(struct device * dev,struct device_attribute * attr,char * buf)301 static ssize_t wb_flush_threshold_show(struct device *dev,
302 					 struct device_attribute *attr,
303 					 char *buf)
304 {
305 	struct ufs_hba *hba = dev_get_drvdata(dev);
306 
307 	return sysfs_emit(buf, "%u\n", hba->vps->wb_flush_threshold);
308 }
309 
wb_flush_threshold_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)310 static ssize_t wb_flush_threshold_store(struct device *dev,
311 					  struct device_attribute *attr,
312 					  const char *buf, size_t count)
313 {
314 	struct ufs_hba *hba = dev_get_drvdata(dev);
315 	unsigned int wb_flush_threshold;
316 
317 	if (kstrtouint(buf, 0, &wb_flush_threshold))
318 		return -EINVAL;
319 
320 	/* The range of values for wb_flush_threshold is (0,10] */
321 	if (wb_flush_threshold > UFS_WB_BUF_REMAIN_PERCENT(100) ||
322 	    wb_flush_threshold == 0) {
323 		dev_err(dev, "The value of wb_flush_threshold is invalid!\n");
324 		return -EINVAL;
325 	}
326 
327 	hba->vps->wb_flush_threshold = wb_flush_threshold;
328 
329 	return count;
330 }
331 
332 static DEVICE_ATTR_RW(rpm_lvl);
333 static DEVICE_ATTR_RO(rpm_target_dev_state);
334 static DEVICE_ATTR_RO(rpm_target_link_state);
335 static DEVICE_ATTR_RW(spm_lvl);
336 static DEVICE_ATTR_RO(spm_target_dev_state);
337 static DEVICE_ATTR_RO(spm_target_link_state);
338 static DEVICE_ATTR_RW(auto_hibern8);
339 static DEVICE_ATTR_RW(wb_on);
340 static DEVICE_ATTR_RW(enable_wb_buf_flush);
341 static DEVICE_ATTR_RW(wb_flush_threshold);
342 
343 static struct attribute *ufs_sysfs_ufshcd_attrs[] = {
344 	&dev_attr_rpm_lvl.attr,
345 	&dev_attr_rpm_target_dev_state.attr,
346 	&dev_attr_rpm_target_link_state.attr,
347 	&dev_attr_spm_lvl.attr,
348 	&dev_attr_spm_target_dev_state.attr,
349 	&dev_attr_spm_target_link_state.attr,
350 	&dev_attr_auto_hibern8.attr,
351 	&dev_attr_wb_on.attr,
352 	&dev_attr_enable_wb_buf_flush.attr,
353 	&dev_attr_wb_flush_threshold.attr,
354 	NULL
355 };
356 
357 static const struct attribute_group ufs_sysfs_default_group = {
358 	.attrs = ufs_sysfs_ufshcd_attrs,
359 };
360 
clock_scaling_show(struct device * dev,struct device_attribute * attr,char * buf)361 static ssize_t clock_scaling_show(struct device *dev, struct device_attribute *attr,
362 				  char *buf)
363 {
364 	struct ufs_hba *hba = dev_get_drvdata(dev);
365 
366 	return sysfs_emit(buf, "%d\n", ufshcd_is_clkscaling_supported(hba));
367 }
368 
write_booster_show(struct device * dev,struct device_attribute * attr,char * buf)369 static ssize_t write_booster_show(struct device *dev, struct device_attribute *attr,
370 				  char *buf)
371 {
372 	struct ufs_hba *hba = dev_get_drvdata(dev);
373 
374 	return sysfs_emit(buf, "%d\n", ufshcd_is_wb_allowed(hba));
375 }
376 
377 static DEVICE_ATTR_RO(clock_scaling);
378 static DEVICE_ATTR_RO(write_booster);
379 
380 /*
381  * See Documentation/ABI/testing/sysfs-driver-ufs for the semantics of this
382  * group.
383  */
384 static struct attribute *ufs_sysfs_capabilities_attrs[] = {
385 	&dev_attr_clock_scaling.attr,
386 	&dev_attr_write_booster.attr,
387 	NULL
388 };
389 
390 static const struct attribute_group ufs_sysfs_capabilities_group = {
391 	.name = "capabilities",
392 	.attrs = ufs_sysfs_capabilities_attrs,
393 };
394 
monitor_enable_show(struct device * dev,struct device_attribute * attr,char * buf)395 static ssize_t monitor_enable_show(struct device *dev,
396 				   struct device_attribute *attr, char *buf)
397 {
398 	struct ufs_hba *hba = dev_get_drvdata(dev);
399 
400 	return sysfs_emit(buf, "%d\n", hba->monitor.enabled);
401 }
402 
monitor_enable_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)403 static ssize_t monitor_enable_store(struct device *dev,
404 				    struct device_attribute *attr,
405 				    const char *buf, size_t count)
406 {
407 	struct ufs_hba *hba = dev_get_drvdata(dev);
408 	unsigned long value, flags;
409 
410 	if (kstrtoul(buf, 0, &value))
411 		return -EINVAL;
412 
413 	value = !!value;
414 	spin_lock_irqsave(hba->host->host_lock, flags);
415 	if (value == hba->monitor.enabled)
416 		goto out_unlock;
417 
418 	if (!value) {
419 		memset(&hba->monitor, 0, sizeof(hba->monitor));
420 	} else {
421 		hba->monitor.enabled = true;
422 		hba->monitor.enabled_ts = ktime_get();
423 	}
424 
425 out_unlock:
426 	spin_unlock_irqrestore(hba->host->host_lock, flags);
427 	return count;
428 }
429 
monitor_chunk_size_show(struct device * dev,struct device_attribute * attr,char * buf)430 static ssize_t monitor_chunk_size_show(struct device *dev,
431 				   struct device_attribute *attr, char *buf)
432 {
433 	struct ufs_hba *hba = dev_get_drvdata(dev);
434 
435 	return sysfs_emit(buf, "%lu\n", hba->monitor.chunk_size);
436 }
437 
monitor_chunk_size_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)438 static ssize_t monitor_chunk_size_store(struct device *dev,
439 				    struct device_attribute *attr,
440 				    const char *buf, size_t count)
441 {
442 	struct ufs_hba *hba = dev_get_drvdata(dev);
443 	unsigned long value, flags;
444 
445 	if (kstrtoul(buf, 0, &value))
446 		return -EINVAL;
447 
448 	spin_lock_irqsave(hba->host->host_lock, flags);
449 	/* Only allow chunk size change when monitor is disabled */
450 	if (!hba->monitor.enabled)
451 		hba->monitor.chunk_size = value;
452 	spin_unlock_irqrestore(hba->host->host_lock, flags);
453 	return count;
454 }
455 
read_total_sectors_show(struct device * dev,struct device_attribute * attr,char * buf)456 static ssize_t read_total_sectors_show(struct device *dev,
457 				       struct device_attribute *attr, char *buf)
458 {
459 	struct ufs_hba *hba = dev_get_drvdata(dev);
460 
461 	return sysfs_emit(buf, "%lu\n", hba->monitor.nr_sec_rw[READ]);
462 }
463 
read_total_busy_show(struct device * dev,struct device_attribute * attr,char * buf)464 static ssize_t read_total_busy_show(struct device *dev,
465 				    struct device_attribute *attr, char *buf)
466 {
467 	struct ufs_hba *hba = dev_get_drvdata(dev);
468 
469 	return sysfs_emit(buf, "%llu\n",
470 			  ktime_to_us(hba->monitor.total_busy[READ]));
471 }
472 
read_nr_requests_show(struct device * dev,struct device_attribute * attr,char * buf)473 static ssize_t read_nr_requests_show(struct device *dev,
474 				     struct device_attribute *attr, char *buf)
475 {
476 	struct ufs_hba *hba = dev_get_drvdata(dev);
477 
478 	return sysfs_emit(buf, "%lu\n", hba->monitor.nr_req[READ]);
479 }
480 
read_req_latency_avg_show(struct device * dev,struct device_attribute * attr,char * buf)481 static ssize_t read_req_latency_avg_show(struct device *dev,
482 					 struct device_attribute *attr,
483 					 char *buf)
484 {
485 	struct ufs_hba *hba = dev_get_drvdata(dev);
486 	struct ufs_hba_monitor *m = &hba->monitor;
487 
488 	return sysfs_emit(buf, "%llu\n", div_u64(ktime_to_us(m->lat_sum[READ]),
489 						 m->nr_req[READ]));
490 }
491 
read_req_latency_max_show(struct device * dev,struct device_attribute * attr,char * buf)492 static ssize_t read_req_latency_max_show(struct device *dev,
493 					 struct device_attribute *attr,
494 					 char *buf)
495 {
496 	struct ufs_hba *hba = dev_get_drvdata(dev);
497 
498 	return sysfs_emit(buf, "%llu\n",
499 			  ktime_to_us(hba->monitor.lat_max[READ]));
500 }
501 
read_req_latency_min_show(struct device * dev,struct device_attribute * attr,char * buf)502 static ssize_t read_req_latency_min_show(struct device *dev,
503 					 struct device_attribute *attr,
504 					 char *buf)
505 {
506 	struct ufs_hba *hba = dev_get_drvdata(dev);
507 
508 	return sysfs_emit(buf, "%llu\n",
509 			  ktime_to_us(hba->monitor.lat_min[READ]));
510 }
511 
read_req_latency_sum_show(struct device * dev,struct device_attribute * attr,char * buf)512 static ssize_t read_req_latency_sum_show(struct device *dev,
513 					 struct device_attribute *attr,
514 					 char *buf)
515 {
516 	struct ufs_hba *hba = dev_get_drvdata(dev);
517 
518 	return sysfs_emit(buf, "%llu\n",
519 			  ktime_to_us(hba->monitor.lat_sum[READ]));
520 }
521 
write_total_sectors_show(struct device * dev,struct device_attribute * attr,char * buf)522 static ssize_t write_total_sectors_show(struct device *dev,
523 					struct device_attribute *attr,
524 					char *buf)
525 {
526 	struct ufs_hba *hba = dev_get_drvdata(dev);
527 
528 	return sysfs_emit(buf, "%lu\n", hba->monitor.nr_sec_rw[WRITE]);
529 }
530 
write_total_busy_show(struct device * dev,struct device_attribute * attr,char * buf)531 static ssize_t write_total_busy_show(struct device *dev,
532 				     struct device_attribute *attr, char *buf)
533 {
534 	struct ufs_hba *hba = dev_get_drvdata(dev);
535 
536 	return sysfs_emit(buf, "%llu\n",
537 			  ktime_to_us(hba->monitor.total_busy[WRITE]));
538 }
539 
write_nr_requests_show(struct device * dev,struct device_attribute * attr,char * buf)540 static ssize_t write_nr_requests_show(struct device *dev,
541 				      struct device_attribute *attr, char *buf)
542 {
543 	struct ufs_hba *hba = dev_get_drvdata(dev);
544 
545 	return sysfs_emit(buf, "%lu\n", hba->monitor.nr_req[WRITE]);
546 }
547 
write_req_latency_avg_show(struct device * dev,struct device_attribute * attr,char * buf)548 static ssize_t write_req_latency_avg_show(struct device *dev,
549 					  struct device_attribute *attr,
550 					  char *buf)
551 {
552 	struct ufs_hba *hba = dev_get_drvdata(dev);
553 	struct ufs_hba_monitor *m = &hba->monitor;
554 
555 	return sysfs_emit(buf, "%llu\n", div_u64(ktime_to_us(m->lat_sum[WRITE]),
556 						 m->nr_req[WRITE]));
557 }
558 
write_req_latency_max_show(struct device * dev,struct device_attribute * attr,char * buf)559 static ssize_t write_req_latency_max_show(struct device *dev,
560 					  struct device_attribute *attr,
561 					  char *buf)
562 {
563 	struct ufs_hba *hba = dev_get_drvdata(dev);
564 
565 	return sysfs_emit(buf, "%llu\n",
566 			  ktime_to_us(hba->monitor.lat_max[WRITE]));
567 }
568 
write_req_latency_min_show(struct device * dev,struct device_attribute * attr,char * buf)569 static ssize_t write_req_latency_min_show(struct device *dev,
570 					  struct device_attribute *attr,
571 					  char *buf)
572 {
573 	struct ufs_hba *hba = dev_get_drvdata(dev);
574 
575 	return sysfs_emit(buf, "%llu\n",
576 			  ktime_to_us(hba->monitor.lat_min[WRITE]));
577 }
578 
write_req_latency_sum_show(struct device * dev,struct device_attribute * attr,char * buf)579 static ssize_t write_req_latency_sum_show(struct device *dev,
580 					  struct device_attribute *attr,
581 					  char *buf)
582 {
583 	struct ufs_hba *hba = dev_get_drvdata(dev);
584 
585 	return sysfs_emit(buf, "%llu\n",
586 			  ktime_to_us(hba->monitor.lat_sum[WRITE]));
587 }
588 
589 static DEVICE_ATTR_RW(monitor_enable);
590 static DEVICE_ATTR_RW(monitor_chunk_size);
591 static DEVICE_ATTR_RO(read_total_sectors);
592 static DEVICE_ATTR_RO(read_total_busy);
593 static DEVICE_ATTR_RO(read_nr_requests);
594 static DEVICE_ATTR_RO(read_req_latency_avg);
595 static DEVICE_ATTR_RO(read_req_latency_max);
596 static DEVICE_ATTR_RO(read_req_latency_min);
597 static DEVICE_ATTR_RO(read_req_latency_sum);
598 static DEVICE_ATTR_RO(write_total_sectors);
599 static DEVICE_ATTR_RO(write_total_busy);
600 static DEVICE_ATTR_RO(write_nr_requests);
601 static DEVICE_ATTR_RO(write_req_latency_avg);
602 static DEVICE_ATTR_RO(write_req_latency_max);
603 static DEVICE_ATTR_RO(write_req_latency_min);
604 static DEVICE_ATTR_RO(write_req_latency_sum);
605 
606 static struct attribute *ufs_sysfs_monitor_attrs[] = {
607 	&dev_attr_monitor_enable.attr,
608 	&dev_attr_monitor_chunk_size.attr,
609 	&dev_attr_read_total_sectors.attr,
610 	&dev_attr_read_total_busy.attr,
611 	&dev_attr_read_nr_requests.attr,
612 	&dev_attr_read_req_latency_avg.attr,
613 	&dev_attr_read_req_latency_max.attr,
614 	&dev_attr_read_req_latency_min.attr,
615 	&dev_attr_read_req_latency_sum.attr,
616 	&dev_attr_write_total_sectors.attr,
617 	&dev_attr_write_total_busy.attr,
618 	&dev_attr_write_nr_requests.attr,
619 	&dev_attr_write_req_latency_avg.attr,
620 	&dev_attr_write_req_latency_max.attr,
621 	&dev_attr_write_req_latency_min.attr,
622 	&dev_attr_write_req_latency_sum.attr,
623 	NULL
624 };
625 
626 static const struct attribute_group ufs_sysfs_monitor_group = {
627 	.name = "monitor",
628 	.attrs = ufs_sysfs_monitor_attrs,
629 };
630 
ufs_sysfs_read_desc_param(struct ufs_hba * hba,enum desc_idn desc_id,u8 desc_index,u8 param_offset,u8 * sysfs_buf,u8 param_size)631 static ssize_t ufs_sysfs_read_desc_param(struct ufs_hba *hba,
632 				  enum desc_idn desc_id,
633 				  u8 desc_index,
634 				  u8 param_offset,
635 				  u8 *sysfs_buf,
636 				  u8 param_size)
637 {
638 	u8 desc_buf[8] = {0};
639 	int ret;
640 
641 	if (param_size > 8)
642 		return -EINVAL;
643 
644 	down(&hba->host_sem);
645 	if (!ufshcd_is_user_access_allowed(hba)) {
646 		ret = -EBUSY;
647 		goto out;
648 	}
649 
650 	ufshcd_rpm_get_sync(hba);
651 	ret = ufshcd_read_desc_param(hba, desc_id, desc_index,
652 				param_offset, desc_buf, param_size);
653 	ufshcd_rpm_put_sync(hba);
654 	if (ret) {
655 		ret = -EINVAL;
656 		goto out;
657 	}
658 
659 	switch (param_size) {
660 	case 1:
661 		ret = sysfs_emit(sysfs_buf, "0x%02X\n", *desc_buf);
662 		break;
663 	case 2:
664 		ret = sysfs_emit(sysfs_buf, "0x%04X\n",
665 			get_unaligned_be16(desc_buf));
666 		break;
667 	case 4:
668 		ret = sysfs_emit(sysfs_buf, "0x%08X\n",
669 			get_unaligned_be32(desc_buf));
670 		break;
671 	case 8:
672 		ret = sysfs_emit(sysfs_buf, "0x%016llX\n",
673 			get_unaligned_be64(desc_buf));
674 		break;
675 	}
676 
677 out:
678 	up(&hba->host_sem);
679 	return ret;
680 }
681 
682 #define UFS_DESC_PARAM(_name, _puname, _duname, _size)			\
683 static ssize_t _name##_show(struct device *dev,				\
684 	struct device_attribute *attr, char *buf)			\
685 {									\
686 	struct ufs_hba *hba = dev_get_drvdata(dev);			\
687 	return ufs_sysfs_read_desc_param(hba, QUERY_DESC_IDN_##_duname,	\
688 		0, _duname##_DESC_PARAM##_puname, buf, _size);		\
689 }									\
690 static DEVICE_ATTR_RO(_name)
691 
692 #define UFS_DEVICE_DESC_PARAM(_name, _uname, _size)			\
693 	UFS_DESC_PARAM(_name, _uname, DEVICE, _size)
694 
695 UFS_DEVICE_DESC_PARAM(device_type, _DEVICE_TYPE, 1);
696 UFS_DEVICE_DESC_PARAM(device_class, _DEVICE_CLASS, 1);
697 UFS_DEVICE_DESC_PARAM(device_sub_class, _DEVICE_SUB_CLASS, 1);
698 UFS_DEVICE_DESC_PARAM(protocol, _PRTCL, 1);
699 UFS_DEVICE_DESC_PARAM(number_of_luns, _NUM_LU, 1);
700 UFS_DEVICE_DESC_PARAM(number_of_wluns, _NUM_WLU, 1);
701 UFS_DEVICE_DESC_PARAM(boot_enable, _BOOT_ENBL, 1);
702 UFS_DEVICE_DESC_PARAM(descriptor_access_enable, _DESC_ACCSS_ENBL, 1);
703 UFS_DEVICE_DESC_PARAM(initial_power_mode, _INIT_PWR_MODE, 1);
704 UFS_DEVICE_DESC_PARAM(high_priority_lun, _HIGH_PR_LUN, 1);
705 UFS_DEVICE_DESC_PARAM(secure_removal_type, _SEC_RMV_TYPE, 1);
706 UFS_DEVICE_DESC_PARAM(support_security_lun, _SEC_LU, 1);
707 UFS_DEVICE_DESC_PARAM(bkops_termination_latency, _BKOP_TERM_LT, 1);
708 UFS_DEVICE_DESC_PARAM(initial_active_icc_level, _ACTVE_ICC_LVL, 1);
709 UFS_DEVICE_DESC_PARAM(specification_version, _SPEC_VER, 2);
710 UFS_DEVICE_DESC_PARAM(manufacturing_date, _MANF_DATE, 2);
711 UFS_DEVICE_DESC_PARAM(manufacturer_id, _MANF_ID, 2);
712 UFS_DEVICE_DESC_PARAM(rtt_capability, _RTT_CAP, 1);
713 UFS_DEVICE_DESC_PARAM(rtc_update, _FRQ_RTC, 2);
714 UFS_DEVICE_DESC_PARAM(ufs_features, _UFS_FEAT, 1);
715 UFS_DEVICE_DESC_PARAM(ffu_timeout, _FFU_TMT, 1);
716 UFS_DEVICE_DESC_PARAM(queue_depth, _Q_DPTH, 1);
717 UFS_DEVICE_DESC_PARAM(device_version, _DEV_VER, 2);
718 UFS_DEVICE_DESC_PARAM(number_of_secure_wpa, _NUM_SEC_WPA, 1);
719 UFS_DEVICE_DESC_PARAM(psa_max_data_size, _PSA_MAX_DATA, 4);
720 UFS_DEVICE_DESC_PARAM(psa_state_timeout, _PSA_TMT, 1);
721 UFS_DEVICE_DESC_PARAM(ext_feature_sup, _EXT_UFS_FEATURE_SUP, 4);
722 UFS_DEVICE_DESC_PARAM(wb_presv_us_en, _WB_PRESRV_USRSPC_EN, 1);
723 UFS_DEVICE_DESC_PARAM(wb_type, _WB_TYPE, 1);
724 UFS_DEVICE_DESC_PARAM(wb_shared_alloc_units, _WB_SHARED_ALLOC_UNITS, 4);
725 
726 static struct attribute *ufs_sysfs_device_descriptor[] = {
727 	&dev_attr_device_type.attr,
728 	&dev_attr_device_class.attr,
729 	&dev_attr_device_sub_class.attr,
730 	&dev_attr_protocol.attr,
731 	&dev_attr_number_of_luns.attr,
732 	&dev_attr_number_of_wluns.attr,
733 	&dev_attr_boot_enable.attr,
734 	&dev_attr_descriptor_access_enable.attr,
735 	&dev_attr_initial_power_mode.attr,
736 	&dev_attr_high_priority_lun.attr,
737 	&dev_attr_secure_removal_type.attr,
738 	&dev_attr_support_security_lun.attr,
739 	&dev_attr_bkops_termination_latency.attr,
740 	&dev_attr_initial_active_icc_level.attr,
741 	&dev_attr_specification_version.attr,
742 	&dev_attr_manufacturing_date.attr,
743 	&dev_attr_manufacturer_id.attr,
744 	&dev_attr_rtt_capability.attr,
745 	&dev_attr_rtc_update.attr,
746 	&dev_attr_ufs_features.attr,
747 	&dev_attr_ffu_timeout.attr,
748 	&dev_attr_queue_depth.attr,
749 	&dev_attr_device_version.attr,
750 	&dev_attr_number_of_secure_wpa.attr,
751 	&dev_attr_psa_max_data_size.attr,
752 	&dev_attr_psa_state_timeout.attr,
753 	&dev_attr_ext_feature_sup.attr,
754 	&dev_attr_wb_presv_us_en.attr,
755 	&dev_attr_wb_type.attr,
756 	&dev_attr_wb_shared_alloc_units.attr,
757 	NULL,
758 };
759 
760 static const struct attribute_group ufs_sysfs_device_descriptor_group = {
761 	.name = "device_descriptor",
762 	.attrs = ufs_sysfs_device_descriptor,
763 };
764 
765 #define UFS_INTERCONNECT_DESC_PARAM(_name, _uname, _size)		\
766 	UFS_DESC_PARAM(_name, _uname, INTERCONNECT, _size)
767 
768 UFS_INTERCONNECT_DESC_PARAM(unipro_version, _UNIPRO_VER, 2);
769 UFS_INTERCONNECT_DESC_PARAM(mphy_version, _MPHY_VER, 2);
770 
771 static struct attribute *ufs_sysfs_interconnect_descriptor[] = {
772 	&dev_attr_unipro_version.attr,
773 	&dev_attr_mphy_version.attr,
774 	NULL,
775 };
776 
777 static const struct attribute_group ufs_sysfs_interconnect_descriptor_group = {
778 	.name = "interconnect_descriptor",
779 	.attrs = ufs_sysfs_interconnect_descriptor,
780 };
781 
782 #define UFS_GEOMETRY_DESC_PARAM(_name, _uname, _size)			\
783 	UFS_DESC_PARAM(_name, _uname, GEOMETRY, _size)
784 
785 UFS_GEOMETRY_DESC_PARAM(raw_device_capacity, _DEV_CAP, 8);
786 UFS_GEOMETRY_DESC_PARAM(max_number_of_luns, _MAX_NUM_LUN, 1);
787 UFS_GEOMETRY_DESC_PARAM(segment_size, _SEG_SIZE, 4);
788 UFS_GEOMETRY_DESC_PARAM(allocation_unit_size, _ALLOC_UNIT_SIZE, 1);
789 UFS_GEOMETRY_DESC_PARAM(min_addressable_block_size, _MIN_BLK_SIZE, 1);
790 UFS_GEOMETRY_DESC_PARAM(optimal_read_block_size, _OPT_RD_BLK_SIZE, 1);
791 UFS_GEOMETRY_DESC_PARAM(optimal_write_block_size, _OPT_WR_BLK_SIZE, 1);
792 UFS_GEOMETRY_DESC_PARAM(max_in_buffer_size, _MAX_IN_BUF_SIZE, 1);
793 UFS_GEOMETRY_DESC_PARAM(max_out_buffer_size, _MAX_OUT_BUF_SIZE, 1);
794 UFS_GEOMETRY_DESC_PARAM(rpmb_rw_size, _RPMB_RW_SIZE, 1);
795 UFS_GEOMETRY_DESC_PARAM(dyn_capacity_resource_policy, _DYN_CAP_RSRC_PLC, 1);
796 UFS_GEOMETRY_DESC_PARAM(data_ordering, _DATA_ORDER, 1);
797 UFS_GEOMETRY_DESC_PARAM(max_number_of_contexts, _MAX_NUM_CTX, 1);
798 UFS_GEOMETRY_DESC_PARAM(sys_data_tag_unit_size, _TAG_UNIT_SIZE, 1);
799 UFS_GEOMETRY_DESC_PARAM(sys_data_tag_resource_size, _TAG_RSRC_SIZE, 1);
800 UFS_GEOMETRY_DESC_PARAM(secure_removal_types, _SEC_RM_TYPES, 1);
801 UFS_GEOMETRY_DESC_PARAM(memory_types, _MEM_TYPES, 2);
802 UFS_GEOMETRY_DESC_PARAM(sys_code_memory_max_alloc_units,
803 	_SCM_MAX_NUM_UNITS, 4);
804 UFS_GEOMETRY_DESC_PARAM(sys_code_memory_capacity_adjustment_factor,
805 	_SCM_CAP_ADJ_FCTR, 2);
806 UFS_GEOMETRY_DESC_PARAM(non_persist_memory_max_alloc_units,
807 	_NPM_MAX_NUM_UNITS, 4);
808 UFS_GEOMETRY_DESC_PARAM(non_persist_memory_capacity_adjustment_factor,
809 	_NPM_CAP_ADJ_FCTR, 2);
810 UFS_GEOMETRY_DESC_PARAM(enh1_memory_max_alloc_units,
811 	_ENM1_MAX_NUM_UNITS, 4);
812 UFS_GEOMETRY_DESC_PARAM(enh1_memory_capacity_adjustment_factor,
813 	_ENM1_CAP_ADJ_FCTR, 2);
814 UFS_GEOMETRY_DESC_PARAM(enh2_memory_max_alloc_units,
815 	_ENM2_MAX_NUM_UNITS, 4);
816 UFS_GEOMETRY_DESC_PARAM(enh2_memory_capacity_adjustment_factor,
817 	_ENM2_CAP_ADJ_FCTR, 2);
818 UFS_GEOMETRY_DESC_PARAM(enh3_memory_max_alloc_units,
819 	_ENM3_MAX_NUM_UNITS, 4);
820 UFS_GEOMETRY_DESC_PARAM(enh3_memory_capacity_adjustment_factor,
821 	_ENM3_CAP_ADJ_FCTR, 2);
822 UFS_GEOMETRY_DESC_PARAM(enh4_memory_max_alloc_units,
823 	_ENM4_MAX_NUM_UNITS, 4);
824 UFS_GEOMETRY_DESC_PARAM(enh4_memory_capacity_adjustment_factor,
825 	_ENM4_CAP_ADJ_FCTR, 2);
826 UFS_GEOMETRY_DESC_PARAM(wb_max_alloc_units, _WB_MAX_ALLOC_UNITS, 4);
827 UFS_GEOMETRY_DESC_PARAM(wb_max_wb_luns, _WB_MAX_WB_LUNS, 1);
828 UFS_GEOMETRY_DESC_PARAM(wb_buff_cap_adj, _WB_BUFF_CAP_ADJ, 1);
829 UFS_GEOMETRY_DESC_PARAM(wb_sup_red_type, _WB_SUP_RED_TYPE, 1);
830 UFS_GEOMETRY_DESC_PARAM(wb_sup_wb_type, _WB_SUP_WB_TYPE, 1);
831 
832 
833 static struct attribute *ufs_sysfs_geometry_descriptor[] = {
834 	&dev_attr_raw_device_capacity.attr,
835 	&dev_attr_max_number_of_luns.attr,
836 	&dev_attr_segment_size.attr,
837 	&dev_attr_allocation_unit_size.attr,
838 	&dev_attr_min_addressable_block_size.attr,
839 	&dev_attr_optimal_read_block_size.attr,
840 	&dev_attr_optimal_write_block_size.attr,
841 	&dev_attr_max_in_buffer_size.attr,
842 	&dev_attr_max_out_buffer_size.attr,
843 	&dev_attr_rpmb_rw_size.attr,
844 	&dev_attr_dyn_capacity_resource_policy.attr,
845 	&dev_attr_data_ordering.attr,
846 	&dev_attr_max_number_of_contexts.attr,
847 	&dev_attr_sys_data_tag_unit_size.attr,
848 	&dev_attr_sys_data_tag_resource_size.attr,
849 	&dev_attr_secure_removal_types.attr,
850 	&dev_attr_memory_types.attr,
851 	&dev_attr_sys_code_memory_max_alloc_units.attr,
852 	&dev_attr_sys_code_memory_capacity_adjustment_factor.attr,
853 	&dev_attr_non_persist_memory_max_alloc_units.attr,
854 	&dev_attr_non_persist_memory_capacity_adjustment_factor.attr,
855 	&dev_attr_enh1_memory_max_alloc_units.attr,
856 	&dev_attr_enh1_memory_capacity_adjustment_factor.attr,
857 	&dev_attr_enh2_memory_max_alloc_units.attr,
858 	&dev_attr_enh2_memory_capacity_adjustment_factor.attr,
859 	&dev_attr_enh3_memory_max_alloc_units.attr,
860 	&dev_attr_enh3_memory_capacity_adjustment_factor.attr,
861 	&dev_attr_enh4_memory_max_alloc_units.attr,
862 	&dev_attr_enh4_memory_capacity_adjustment_factor.attr,
863 	&dev_attr_wb_max_alloc_units.attr,
864 	&dev_attr_wb_max_wb_luns.attr,
865 	&dev_attr_wb_buff_cap_adj.attr,
866 	&dev_attr_wb_sup_red_type.attr,
867 	&dev_attr_wb_sup_wb_type.attr,
868 	NULL,
869 };
870 
871 static const struct attribute_group ufs_sysfs_geometry_descriptor_group = {
872 	.name = "geometry_descriptor",
873 	.attrs = ufs_sysfs_geometry_descriptor,
874 };
875 
876 #define UFS_HEALTH_DESC_PARAM(_name, _uname, _size)			\
877 	UFS_DESC_PARAM(_name, _uname, HEALTH, _size)
878 
879 UFS_HEALTH_DESC_PARAM(eol_info, _EOL_INFO, 1);
880 UFS_HEALTH_DESC_PARAM(life_time_estimation_a, _LIFE_TIME_EST_A, 1);
881 UFS_HEALTH_DESC_PARAM(life_time_estimation_b, _LIFE_TIME_EST_B, 1);
882 
883 static struct attribute *ufs_sysfs_health_descriptor[] = {
884 	&dev_attr_eol_info.attr,
885 	&dev_attr_life_time_estimation_a.attr,
886 	&dev_attr_life_time_estimation_b.attr,
887 	NULL,
888 };
889 
890 static const struct attribute_group ufs_sysfs_health_descriptor_group = {
891 	.name = "health_descriptor",
892 	.attrs = ufs_sysfs_health_descriptor,
893 };
894 
895 #define UFS_POWER_DESC_PARAM(_name, _uname, _index)			\
896 static ssize_t _name##_index##_show(struct device *dev,			\
897 	struct device_attribute *attr, char *buf)			\
898 {									\
899 	struct ufs_hba *hba = dev_get_drvdata(dev);			\
900 	return ufs_sysfs_read_desc_param(hba, QUERY_DESC_IDN_POWER, 0,	\
901 		PWR_DESC##_uname##_0 + _index * 2, buf, 2);		\
902 }									\
903 static DEVICE_ATTR_RO(_name##_index)
904 
905 UFS_POWER_DESC_PARAM(active_icc_levels_vcc, _ACTIVE_LVLS_VCC, 0);
906 UFS_POWER_DESC_PARAM(active_icc_levels_vcc, _ACTIVE_LVLS_VCC, 1);
907 UFS_POWER_DESC_PARAM(active_icc_levels_vcc, _ACTIVE_LVLS_VCC, 2);
908 UFS_POWER_DESC_PARAM(active_icc_levels_vcc, _ACTIVE_LVLS_VCC, 3);
909 UFS_POWER_DESC_PARAM(active_icc_levels_vcc, _ACTIVE_LVLS_VCC, 4);
910 UFS_POWER_DESC_PARAM(active_icc_levels_vcc, _ACTIVE_LVLS_VCC, 5);
911 UFS_POWER_DESC_PARAM(active_icc_levels_vcc, _ACTIVE_LVLS_VCC, 6);
912 UFS_POWER_DESC_PARAM(active_icc_levels_vcc, _ACTIVE_LVLS_VCC, 7);
913 UFS_POWER_DESC_PARAM(active_icc_levels_vcc, _ACTIVE_LVLS_VCC, 8);
914 UFS_POWER_DESC_PARAM(active_icc_levels_vcc, _ACTIVE_LVLS_VCC, 9);
915 UFS_POWER_DESC_PARAM(active_icc_levels_vcc, _ACTIVE_LVLS_VCC, 10);
916 UFS_POWER_DESC_PARAM(active_icc_levels_vcc, _ACTIVE_LVLS_VCC, 11);
917 UFS_POWER_DESC_PARAM(active_icc_levels_vcc, _ACTIVE_LVLS_VCC, 12);
918 UFS_POWER_DESC_PARAM(active_icc_levels_vcc, _ACTIVE_LVLS_VCC, 13);
919 UFS_POWER_DESC_PARAM(active_icc_levels_vcc, _ACTIVE_LVLS_VCC, 14);
920 UFS_POWER_DESC_PARAM(active_icc_levels_vcc, _ACTIVE_LVLS_VCC, 15);
921 UFS_POWER_DESC_PARAM(active_icc_levels_vccq, _ACTIVE_LVLS_VCCQ, 0);
922 UFS_POWER_DESC_PARAM(active_icc_levels_vccq, _ACTIVE_LVLS_VCCQ, 1);
923 UFS_POWER_DESC_PARAM(active_icc_levels_vccq, _ACTIVE_LVLS_VCCQ, 2);
924 UFS_POWER_DESC_PARAM(active_icc_levels_vccq, _ACTIVE_LVLS_VCCQ, 3);
925 UFS_POWER_DESC_PARAM(active_icc_levels_vccq, _ACTIVE_LVLS_VCCQ, 4);
926 UFS_POWER_DESC_PARAM(active_icc_levels_vccq, _ACTIVE_LVLS_VCCQ, 5);
927 UFS_POWER_DESC_PARAM(active_icc_levels_vccq, _ACTIVE_LVLS_VCCQ, 6);
928 UFS_POWER_DESC_PARAM(active_icc_levels_vccq, _ACTIVE_LVLS_VCCQ, 7);
929 UFS_POWER_DESC_PARAM(active_icc_levels_vccq, _ACTIVE_LVLS_VCCQ, 8);
930 UFS_POWER_DESC_PARAM(active_icc_levels_vccq, _ACTIVE_LVLS_VCCQ, 9);
931 UFS_POWER_DESC_PARAM(active_icc_levels_vccq, _ACTIVE_LVLS_VCCQ, 10);
932 UFS_POWER_DESC_PARAM(active_icc_levels_vccq, _ACTIVE_LVLS_VCCQ, 11);
933 UFS_POWER_DESC_PARAM(active_icc_levels_vccq, _ACTIVE_LVLS_VCCQ, 12);
934 UFS_POWER_DESC_PARAM(active_icc_levels_vccq, _ACTIVE_LVLS_VCCQ, 13);
935 UFS_POWER_DESC_PARAM(active_icc_levels_vccq, _ACTIVE_LVLS_VCCQ, 14);
936 UFS_POWER_DESC_PARAM(active_icc_levels_vccq, _ACTIVE_LVLS_VCCQ, 15);
937 UFS_POWER_DESC_PARAM(active_icc_levels_vccq2, _ACTIVE_LVLS_VCCQ2, 0);
938 UFS_POWER_DESC_PARAM(active_icc_levels_vccq2, _ACTIVE_LVLS_VCCQ2, 1);
939 UFS_POWER_DESC_PARAM(active_icc_levels_vccq2, _ACTIVE_LVLS_VCCQ2, 2);
940 UFS_POWER_DESC_PARAM(active_icc_levels_vccq2, _ACTIVE_LVLS_VCCQ2, 3);
941 UFS_POWER_DESC_PARAM(active_icc_levels_vccq2, _ACTIVE_LVLS_VCCQ2, 4);
942 UFS_POWER_DESC_PARAM(active_icc_levels_vccq2, _ACTIVE_LVLS_VCCQ2, 5);
943 UFS_POWER_DESC_PARAM(active_icc_levels_vccq2, _ACTIVE_LVLS_VCCQ2, 6);
944 UFS_POWER_DESC_PARAM(active_icc_levels_vccq2, _ACTIVE_LVLS_VCCQ2, 7);
945 UFS_POWER_DESC_PARAM(active_icc_levels_vccq2, _ACTIVE_LVLS_VCCQ2, 8);
946 UFS_POWER_DESC_PARAM(active_icc_levels_vccq2, _ACTIVE_LVLS_VCCQ2, 9);
947 UFS_POWER_DESC_PARAM(active_icc_levels_vccq2, _ACTIVE_LVLS_VCCQ2, 10);
948 UFS_POWER_DESC_PARAM(active_icc_levels_vccq2, _ACTIVE_LVLS_VCCQ2, 11);
949 UFS_POWER_DESC_PARAM(active_icc_levels_vccq2, _ACTIVE_LVLS_VCCQ2, 12);
950 UFS_POWER_DESC_PARAM(active_icc_levels_vccq2, _ACTIVE_LVLS_VCCQ2, 13);
951 UFS_POWER_DESC_PARAM(active_icc_levels_vccq2, _ACTIVE_LVLS_VCCQ2, 14);
952 UFS_POWER_DESC_PARAM(active_icc_levels_vccq2, _ACTIVE_LVLS_VCCQ2, 15);
953 
954 static struct attribute *ufs_sysfs_power_descriptor[] = {
955 	&dev_attr_active_icc_levels_vcc0.attr,
956 	&dev_attr_active_icc_levels_vcc1.attr,
957 	&dev_attr_active_icc_levels_vcc2.attr,
958 	&dev_attr_active_icc_levels_vcc3.attr,
959 	&dev_attr_active_icc_levels_vcc4.attr,
960 	&dev_attr_active_icc_levels_vcc5.attr,
961 	&dev_attr_active_icc_levels_vcc6.attr,
962 	&dev_attr_active_icc_levels_vcc7.attr,
963 	&dev_attr_active_icc_levels_vcc8.attr,
964 	&dev_attr_active_icc_levels_vcc9.attr,
965 	&dev_attr_active_icc_levels_vcc10.attr,
966 	&dev_attr_active_icc_levels_vcc11.attr,
967 	&dev_attr_active_icc_levels_vcc12.attr,
968 	&dev_attr_active_icc_levels_vcc13.attr,
969 	&dev_attr_active_icc_levels_vcc14.attr,
970 	&dev_attr_active_icc_levels_vcc15.attr,
971 	&dev_attr_active_icc_levels_vccq0.attr,
972 	&dev_attr_active_icc_levels_vccq1.attr,
973 	&dev_attr_active_icc_levels_vccq2.attr,
974 	&dev_attr_active_icc_levels_vccq3.attr,
975 	&dev_attr_active_icc_levels_vccq4.attr,
976 	&dev_attr_active_icc_levels_vccq5.attr,
977 	&dev_attr_active_icc_levels_vccq6.attr,
978 	&dev_attr_active_icc_levels_vccq7.attr,
979 	&dev_attr_active_icc_levels_vccq8.attr,
980 	&dev_attr_active_icc_levels_vccq9.attr,
981 	&dev_attr_active_icc_levels_vccq10.attr,
982 	&dev_attr_active_icc_levels_vccq11.attr,
983 	&dev_attr_active_icc_levels_vccq12.attr,
984 	&dev_attr_active_icc_levels_vccq13.attr,
985 	&dev_attr_active_icc_levels_vccq14.attr,
986 	&dev_attr_active_icc_levels_vccq15.attr,
987 	&dev_attr_active_icc_levels_vccq20.attr,
988 	&dev_attr_active_icc_levels_vccq21.attr,
989 	&dev_attr_active_icc_levels_vccq22.attr,
990 	&dev_attr_active_icc_levels_vccq23.attr,
991 	&dev_attr_active_icc_levels_vccq24.attr,
992 	&dev_attr_active_icc_levels_vccq25.attr,
993 	&dev_attr_active_icc_levels_vccq26.attr,
994 	&dev_attr_active_icc_levels_vccq27.attr,
995 	&dev_attr_active_icc_levels_vccq28.attr,
996 	&dev_attr_active_icc_levels_vccq29.attr,
997 	&dev_attr_active_icc_levels_vccq210.attr,
998 	&dev_attr_active_icc_levels_vccq211.attr,
999 	&dev_attr_active_icc_levels_vccq212.attr,
1000 	&dev_attr_active_icc_levels_vccq213.attr,
1001 	&dev_attr_active_icc_levels_vccq214.attr,
1002 	&dev_attr_active_icc_levels_vccq215.attr,
1003 	NULL,
1004 };
1005 
1006 static const struct attribute_group ufs_sysfs_power_descriptor_group = {
1007 	.name = "power_descriptor",
1008 	.attrs = ufs_sysfs_power_descriptor,
1009 };
1010 
1011 #define UFS_STRING_DESCRIPTOR(_name, _pname)				\
1012 static ssize_t _name##_show(struct device *dev,				\
1013 	struct device_attribute *attr, char *buf)			\
1014 {									\
1015 	u8 index;							\
1016 	struct ufs_hba *hba = dev_get_drvdata(dev);			\
1017 	int ret;							\
1018 	int desc_len = QUERY_DESC_MAX_SIZE;				\
1019 	u8 *desc_buf;							\
1020 									\
1021 	down(&hba->host_sem);						\
1022 	if (!ufshcd_is_user_access_allowed(hba)) {			\
1023 		up(&hba->host_sem);					\
1024 		return -EBUSY;						\
1025 	}								\
1026 	desc_buf = kzalloc(QUERY_DESC_MAX_SIZE, GFP_ATOMIC);		\
1027 	if (!desc_buf) {						\
1028 		up(&hba->host_sem);					\
1029 		return -ENOMEM;						\
1030 	}								\
1031 	ufshcd_rpm_get_sync(hba);					\
1032 	ret = ufshcd_query_descriptor_retry(hba,			\
1033 		UPIU_QUERY_OPCODE_READ_DESC, QUERY_DESC_IDN_DEVICE,	\
1034 		0, 0, desc_buf, &desc_len);				\
1035 	if (ret) {							\
1036 		ret = -EINVAL;						\
1037 		goto out;						\
1038 	}								\
1039 	index = desc_buf[DEVICE_DESC_PARAM##_pname];			\
1040 	kfree(desc_buf);						\
1041 	desc_buf = NULL;						\
1042 	ret = ufshcd_read_string_desc(hba, index, &desc_buf,		\
1043 				      SD_ASCII_STD);			\
1044 	if (ret < 0)							\
1045 		goto out;						\
1046 	ret = sysfs_emit(buf, "%s\n", desc_buf);			\
1047 out:									\
1048 	ufshcd_rpm_put_sync(hba);					\
1049 	kfree(desc_buf);						\
1050 	up(&hba->host_sem);						\
1051 	return ret;							\
1052 }									\
1053 static DEVICE_ATTR_RO(_name)
1054 
1055 UFS_STRING_DESCRIPTOR(manufacturer_name, _MANF_NAME);
1056 UFS_STRING_DESCRIPTOR(product_name, _PRDCT_NAME);
1057 UFS_STRING_DESCRIPTOR(oem_id, _OEM_ID);
1058 UFS_STRING_DESCRIPTOR(serial_number, _SN);
1059 UFS_STRING_DESCRIPTOR(product_revision, _PRDCT_REV);
1060 
1061 static struct attribute *ufs_sysfs_string_descriptors[] = {
1062 	&dev_attr_manufacturer_name.attr,
1063 	&dev_attr_product_name.attr,
1064 	&dev_attr_oem_id.attr,
1065 	&dev_attr_serial_number.attr,
1066 	&dev_attr_product_revision.attr,
1067 	NULL,
1068 };
1069 
1070 static const struct attribute_group ufs_sysfs_string_descriptors_group = {
1071 	.name = "string_descriptors",
1072 	.attrs = ufs_sysfs_string_descriptors,
1073 };
1074 
ufshcd_is_wb_flags(enum flag_idn idn)1075 static inline bool ufshcd_is_wb_flags(enum flag_idn idn)
1076 {
1077 	return idn >= QUERY_FLAG_IDN_WB_EN &&
1078 		idn <= QUERY_FLAG_IDN_WB_BUFF_FLUSH_DURING_HIBERN8;
1079 }
1080 
1081 #define UFS_FLAG(_name, _uname)						\
1082 static ssize_t _name##_show(struct device *dev,				\
1083 	struct device_attribute *attr, char *buf)			\
1084 {									\
1085 	bool flag;							\
1086 	u8 index = 0;							\
1087 	int ret;							\
1088 	struct ufs_hba *hba = dev_get_drvdata(dev);			\
1089 									\
1090 	down(&hba->host_sem);						\
1091 	if (!ufshcd_is_user_access_allowed(hba)) {			\
1092 		up(&hba->host_sem);					\
1093 		return -EBUSY;						\
1094 	}								\
1095 	if (ufshcd_is_wb_flags(QUERY_FLAG_IDN##_uname))			\
1096 		index = ufshcd_wb_get_query_index(hba);			\
1097 	ufshcd_rpm_get_sync(hba);					\
1098 	ret = ufshcd_query_flag(hba, UPIU_QUERY_OPCODE_READ_FLAG,	\
1099 		QUERY_FLAG_IDN##_uname, index, &flag);			\
1100 	ufshcd_rpm_put_sync(hba);					\
1101 	if (ret) {							\
1102 		ret = -EINVAL;						\
1103 		goto out;						\
1104 	}								\
1105 	ret = sysfs_emit(buf, "%s\n", flag ? "true" : "false");		\
1106 out:									\
1107 	up(&hba->host_sem);						\
1108 	return ret;							\
1109 }									\
1110 static DEVICE_ATTR_RO(_name)
1111 
1112 UFS_FLAG(device_init, _FDEVICEINIT);
1113 UFS_FLAG(permanent_wpe, _PERMANENT_WPE);
1114 UFS_FLAG(power_on_wpe, _PWR_ON_WPE);
1115 UFS_FLAG(bkops_enable, _BKOPS_EN);
1116 UFS_FLAG(life_span_mode_enable, _LIFE_SPAN_MODE_ENABLE);
1117 UFS_FLAG(phy_resource_removal, _FPHYRESOURCEREMOVAL);
1118 UFS_FLAG(busy_rtc, _BUSY_RTC);
1119 UFS_FLAG(disable_fw_update, _PERMANENTLY_DISABLE_FW_UPDATE);
1120 UFS_FLAG(wb_enable, _WB_EN);
1121 UFS_FLAG(wb_flush_en, _WB_BUFF_FLUSH_EN);
1122 UFS_FLAG(wb_flush_during_h8, _WB_BUFF_FLUSH_DURING_HIBERN8);
1123 
1124 static struct attribute *ufs_sysfs_device_flags[] = {
1125 	&dev_attr_device_init.attr,
1126 	&dev_attr_permanent_wpe.attr,
1127 	&dev_attr_power_on_wpe.attr,
1128 	&dev_attr_bkops_enable.attr,
1129 	&dev_attr_life_span_mode_enable.attr,
1130 	&dev_attr_phy_resource_removal.attr,
1131 	&dev_attr_busy_rtc.attr,
1132 	&dev_attr_disable_fw_update.attr,
1133 	&dev_attr_wb_enable.attr,
1134 	&dev_attr_wb_flush_en.attr,
1135 	&dev_attr_wb_flush_during_h8.attr,
1136 	NULL,
1137 };
1138 
1139 static const struct attribute_group ufs_sysfs_flags_group = {
1140 	.name = "flags",
1141 	.attrs = ufs_sysfs_device_flags,
1142 };
1143 
ufshcd_is_wb_attrs(enum attr_idn idn)1144 static inline bool ufshcd_is_wb_attrs(enum attr_idn idn)
1145 {
1146 	return idn >= QUERY_ATTR_IDN_WB_FLUSH_STATUS &&
1147 		idn <= QUERY_ATTR_IDN_CURR_WB_BUFF_SIZE;
1148 }
1149 
1150 #define UFS_ATTRIBUTE(_name, _uname)					\
1151 static ssize_t _name##_show(struct device *dev,				\
1152 	struct device_attribute *attr, char *buf)			\
1153 {									\
1154 	struct ufs_hba *hba = dev_get_drvdata(dev);			\
1155 	u32 value;							\
1156 	int ret;							\
1157 	u8 index = 0;							\
1158 									\
1159 	down(&hba->host_sem);						\
1160 	if (!ufshcd_is_user_access_allowed(hba)) {			\
1161 		up(&hba->host_sem);					\
1162 		return -EBUSY;						\
1163 	}								\
1164 	if (ufshcd_is_wb_attrs(QUERY_ATTR_IDN##_uname))			\
1165 		index = ufshcd_wb_get_query_index(hba);			\
1166 	ufshcd_rpm_get_sync(hba);					\
1167 	ret = ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_READ_ATTR,	\
1168 		QUERY_ATTR_IDN##_uname, index, 0, &value);		\
1169 	ufshcd_rpm_put_sync(hba);					\
1170 	if (ret) {							\
1171 		ret = -EINVAL;						\
1172 		goto out;						\
1173 	}								\
1174 	ret = sysfs_emit(buf, "0x%08X\n", value);			\
1175 out:									\
1176 	up(&hba->host_sem);						\
1177 	return ret;							\
1178 }									\
1179 static DEVICE_ATTR_RO(_name)
1180 
1181 UFS_ATTRIBUTE(boot_lun_enabled, _BOOT_LU_EN);
1182 UFS_ATTRIBUTE(current_power_mode, _POWER_MODE);
1183 UFS_ATTRIBUTE(active_icc_level, _ACTIVE_ICC_LVL);
1184 UFS_ATTRIBUTE(ooo_data_enabled, _OOO_DATA_EN);
1185 UFS_ATTRIBUTE(bkops_status, _BKOPS_STATUS);
1186 UFS_ATTRIBUTE(purge_status, _PURGE_STATUS);
1187 UFS_ATTRIBUTE(max_data_in_size, _MAX_DATA_IN);
1188 UFS_ATTRIBUTE(max_data_out_size, _MAX_DATA_OUT);
1189 UFS_ATTRIBUTE(reference_clock_frequency, _REF_CLK_FREQ);
1190 UFS_ATTRIBUTE(configuration_descriptor_lock, _CONF_DESC_LOCK);
1191 UFS_ATTRIBUTE(max_number_of_rtt, _MAX_NUM_OF_RTT);
1192 UFS_ATTRIBUTE(exception_event_control, _EE_CONTROL);
1193 UFS_ATTRIBUTE(exception_event_status, _EE_STATUS);
1194 UFS_ATTRIBUTE(ffu_status, _FFU_STATUS);
1195 UFS_ATTRIBUTE(psa_state, _PSA_STATE);
1196 UFS_ATTRIBUTE(psa_data_size, _PSA_DATA_SIZE);
1197 UFS_ATTRIBUTE(wb_flush_status, _WB_FLUSH_STATUS);
1198 UFS_ATTRIBUTE(wb_avail_buf, _AVAIL_WB_BUFF_SIZE);
1199 UFS_ATTRIBUTE(wb_life_time_est, _WB_BUFF_LIFE_TIME_EST);
1200 UFS_ATTRIBUTE(wb_cur_buf, _CURR_WB_BUFF_SIZE);
1201 
1202 
1203 static struct attribute *ufs_sysfs_attributes[] = {
1204 	&dev_attr_boot_lun_enabled.attr,
1205 	&dev_attr_current_power_mode.attr,
1206 	&dev_attr_active_icc_level.attr,
1207 	&dev_attr_ooo_data_enabled.attr,
1208 	&dev_attr_bkops_status.attr,
1209 	&dev_attr_purge_status.attr,
1210 	&dev_attr_max_data_in_size.attr,
1211 	&dev_attr_max_data_out_size.attr,
1212 	&dev_attr_reference_clock_frequency.attr,
1213 	&dev_attr_configuration_descriptor_lock.attr,
1214 	&dev_attr_max_number_of_rtt.attr,
1215 	&dev_attr_exception_event_control.attr,
1216 	&dev_attr_exception_event_status.attr,
1217 	&dev_attr_ffu_status.attr,
1218 	&dev_attr_psa_state.attr,
1219 	&dev_attr_psa_data_size.attr,
1220 	&dev_attr_wb_flush_status.attr,
1221 	&dev_attr_wb_avail_buf.attr,
1222 	&dev_attr_wb_life_time_est.attr,
1223 	&dev_attr_wb_cur_buf.attr,
1224 	NULL,
1225 };
1226 
1227 static const struct attribute_group ufs_sysfs_attributes_group = {
1228 	.name = "attributes",
1229 	.attrs = ufs_sysfs_attributes,
1230 };
1231 
1232 static const struct attribute_group *ufs_sysfs_groups[] = {
1233 	&ufs_sysfs_default_group,
1234 	&ufs_sysfs_capabilities_group,
1235 	&ufs_sysfs_monitor_group,
1236 	&ufs_sysfs_device_descriptor_group,
1237 	&ufs_sysfs_interconnect_descriptor_group,
1238 	&ufs_sysfs_geometry_descriptor_group,
1239 	&ufs_sysfs_health_descriptor_group,
1240 	&ufs_sysfs_power_descriptor_group,
1241 	&ufs_sysfs_string_descriptors_group,
1242 	&ufs_sysfs_flags_group,
1243 	&ufs_sysfs_attributes_group,
1244 	NULL,
1245 };
1246 
1247 #define UFS_LUN_DESC_PARAM(_pname, _puname, _duname, _size)		\
1248 static ssize_t _pname##_show(struct device *dev,			\
1249 	struct device_attribute *attr, char *buf)			\
1250 {									\
1251 	struct scsi_device *sdev = to_scsi_device(dev);			\
1252 	struct ufs_hba *hba = shost_priv(sdev->host);			\
1253 	u8 lun = ufshcd_scsi_to_upiu_lun(sdev->lun);			\
1254 	if (!ufs_is_valid_unit_desc_lun(&hba->dev_info, lun))		\
1255 		return -EINVAL;						\
1256 	return ufs_sysfs_read_desc_param(hba, QUERY_DESC_IDN_##_duname,	\
1257 		lun, _duname##_DESC_PARAM##_puname, buf, _size);	\
1258 }									\
1259 static DEVICE_ATTR_RO(_pname)
1260 
1261 #define UFS_UNIT_DESC_PARAM(_name, _uname, _size)			\
1262 	UFS_LUN_DESC_PARAM(_name, _uname, UNIT, _size)
1263 
1264 UFS_UNIT_DESC_PARAM(lu_enable, _LU_ENABLE, 1);
1265 UFS_UNIT_DESC_PARAM(boot_lun_id, _BOOT_LUN_ID, 1);
1266 UFS_UNIT_DESC_PARAM(lun_write_protect, _LU_WR_PROTECT, 1);
1267 UFS_UNIT_DESC_PARAM(lun_queue_depth, _LU_Q_DEPTH, 1);
1268 UFS_UNIT_DESC_PARAM(psa_sensitive, _PSA_SENSITIVE, 1);
1269 UFS_UNIT_DESC_PARAM(lun_memory_type, _MEM_TYPE, 1);
1270 UFS_UNIT_DESC_PARAM(data_reliability, _DATA_RELIABILITY, 1);
1271 UFS_UNIT_DESC_PARAM(logical_block_size, _LOGICAL_BLK_SIZE, 1);
1272 UFS_UNIT_DESC_PARAM(logical_block_count, _LOGICAL_BLK_COUNT, 8);
1273 UFS_UNIT_DESC_PARAM(erase_block_size, _ERASE_BLK_SIZE, 4);
1274 UFS_UNIT_DESC_PARAM(provisioning_type, _PROVISIONING_TYPE, 1);
1275 UFS_UNIT_DESC_PARAM(physical_memory_resourse_count, _PHY_MEM_RSRC_CNT, 8);
1276 UFS_UNIT_DESC_PARAM(context_capabilities, _CTX_CAPABILITIES, 2);
1277 UFS_UNIT_DESC_PARAM(large_unit_granularity, _LARGE_UNIT_SIZE_M1, 1);
1278 UFS_UNIT_DESC_PARAM(wb_buf_alloc_units, _WB_BUF_ALLOC_UNITS, 4);
1279 
1280 static struct attribute *ufs_sysfs_unit_descriptor[] = {
1281 	&dev_attr_lu_enable.attr,
1282 	&dev_attr_boot_lun_id.attr,
1283 	&dev_attr_lun_write_protect.attr,
1284 	&dev_attr_lun_queue_depth.attr,
1285 	&dev_attr_psa_sensitive.attr,
1286 	&dev_attr_lun_memory_type.attr,
1287 	&dev_attr_data_reliability.attr,
1288 	&dev_attr_logical_block_size.attr,
1289 	&dev_attr_logical_block_count.attr,
1290 	&dev_attr_erase_block_size.attr,
1291 	&dev_attr_provisioning_type.attr,
1292 	&dev_attr_physical_memory_resourse_count.attr,
1293 	&dev_attr_context_capabilities.attr,
1294 	&dev_attr_large_unit_granularity.attr,
1295 	&dev_attr_wb_buf_alloc_units.attr,
1296 	NULL,
1297 };
1298 
ufs_unit_descriptor_is_visible(struct kobject * kobj,struct attribute * attr,int n)1299 static umode_t ufs_unit_descriptor_is_visible(struct kobject *kobj, struct attribute *attr, int n)
1300 {
1301 	struct device *dev = container_of(kobj, struct device, kobj);
1302 	struct scsi_device *sdev = to_scsi_device(dev);
1303 	u8 lun = ufshcd_scsi_to_upiu_lun(sdev->lun);
1304 	umode_t mode = attr->mode;
1305 
1306 	if (lun == UFS_UPIU_BOOT_WLUN || lun == UFS_UPIU_UFS_DEVICE_WLUN)
1307 		/* Boot and device WLUN have no unit descriptors */
1308 		mode = 0;
1309 	if (lun == UFS_UPIU_RPMB_WLUN && attr == &dev_attr_wb_buf_alloc_units.attr)
1310 		mode = 0;
1311 
1312 	return mode;
1313 }
1314 
1315 
1316 const struct attribute_group ufs_sysfs_unit_descriptor_group = {
1317 	.name = "unit_descriptor",
1318 	.attrs = ufs_sysfs_unit_descriptor,
1319 	.is_visible = ufs_unit_descriptor_is_visible,
1320 };
1321 
dyn_cap_needed_attribute_show(struct device * dev,struct device_attribute * attr,char * buf)1322 static ssize_t dyn_cap_needed_attribute_show(struct device *dev,
1323 	struct device_attribute *attr, char *buf)
1324 {
1325 	u32 value;
1326 	struct scsi_device *sdev = to_scsi_device(dev);
1327 	struct ufs_hba *hba = shost_priv(sdev->host);
1328 	u8 lun = ufshcd_scsi_to_upiu_lun(sdev->lun);
1329 	int ret;
1330 
1331 	down(&hba->host_sem);
1332 	if (!ufshcd_is_user_access_allowed(hba)) {
1333 		ret = -EBUSY;
1334 		goto out;
1335 	}
1336 
1337 	ufshcd_rpm_get_sync(hba);
1338 	ret = ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_READ_ATTR,
1339 		QUERY_ATTR_IDN_DYN_CAP_NEEDED, lun, 0, &value);
1340 	ufshcd_rpm_put_sync(hba);
1341 	if (ret) {
1342 		ret = -EINVAL;
1343 		goto out;
1344 	}
1345 
1346 	ret = sysfs_emit(buf, "0x%08X\n", value);
1347 
1348 out:
1349 	up(&hba->host_sem);
1350 	return ret;
1351 }
1352 static DEVICE_ATTR_RO(dyn_cap_needed_attribute);
1353 
1354 static struct attribute *ufs_sysfs_lun_attributes[] = {
1355 	&dev_attr_dyn_cap_needed_attribute.attr,
1356 	NULL,
1357 };
1358 
1359 const struct attribute_group ufs_sysfs_lun_attributes_group = {
1360 	.attrs = ufs_sysfs_lun_attributes,
1361 };
1362 
ufs_sysfs_add_nodes(struct device * dev)1363 void ufs_sysfs_add_nodes(struct device *dev)
1364 {
1365 	int ret;
1366 
1367 	ret = sysfs_create_groups(&dev->kobj, ufs_sysfs_groups);
1368 	if (ret)
1369 		dev_err(dev,
1370 			"%s: sysfs groups creation failed (err = %d)\n",
1371 			__func__, ret);
1372 }
1373 
ufs_sysfs_remove_nodes(struct device * dev)1374 void ufs_sysfs_remove_nodes(struct device *dev)
1375 {
1376 	sysfs_remove_groups(&dev->kobj, ufs_sysfs_groups);
1377 }
1378