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54e41810 GF |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Debugfs interface | |
4 | * | |
5 | * Copyright (C) 2020, Intel Corporation | |
6 | * Authors: Gil Fine <gil.fine@intel.com> | |
7 | * Mika Westerberg <mika.westerberg@linux.intel.com> | |
8 | */ | |
9 | ||
10 | #include <linux/debugfs.h> | |
11 | #include <linux/pm_runtime.h> | |
77455129 | 12 | #include <linux/uaccess.h> |
54e41810 GF |
13 | |
14 | #include "tb.h" | |
15 | ||
16 | #define PORT_CAP_PCIE_LEN 1 | |
17 | #define PORT_CAP_POWER_LEN 2 | |
18 | #define PORT_CAP_LANE_LEN 3 | |
19 | #define PORT_CAP_USB3_LEN 5 | |
20 | #define PORT_CAP_DP_LEN 8 | |
21 | #define PORT_CAP_TMU_LEN 8 | |
22 | #define PORT_CAP_BASIC_LEN 9 | |
23 | #define PORT_CAP_USB4_LEN 20 | |
24 | ||
25 | #define SWITCH_CAP_TMU_LEN 26 | |
26 | #define SWITCH_CAP_BASIC_LEN 27 | |
27 | ||
28 | #define PATH_LEN 2 | |
29 | ||
30 | #define COUNTER_SET_LEN 3 | |
31 | ||
32 | #define DEBUGFS_ATTR(__space, __write) \ | |
33 | static int __space ## _open(struct inode *inode, struct file *file) \ | |
34 | { \ | |
35 | return single_open(file, __space ## _show, inode->i_private); \ | |
36 | } \ | |
37 | \ | |
38 | static const struct file_operations __space ## _fops = { \ | |
39 | .owner = THIS_MODULE, \ | |
40 | .open = __space ## _open, \ | |
41 | .release = single_release, \ | |
42 | .read = seq_read, \ | |
43 | .write = __write, \ | |
44 | .llseek = seq_lseek, \ | |
45 | } | |
46 | ||
47 | #define DEBUGFS_ATTR_RO(__space) \ | |
48 | DEBUGFS_ATTR(__space, NULL) | |
49 | ||
50 | #define DEBUGFS_ATTR_RW(__space) \ | |
51 | DEBUGFS_ATTR(__space, __space ## _write) | |
52 | ||
53 | static struct dentry *tb_debugfs_root; | |
54 | ||
55 | static void *validate_and_copy_from_user(const void __user *user_buf, | |
56 | size_t *count) | |
57 | { | |
58 | size_t nbytes; | |
59 | void *buf; | |
60 | ||
61 | if (!*count) | |
62 | return ERR_PTR(-EINVAL); | |
63 | ||
64 | if (!access_ok(user_buf, *count)) | |
65 | return ERR_PTR(-EFAULT); | |
66 | ||
67 | buf = (void *)get_zeroed_page(GFP_KERNEL); | |
68 | if (!buf) | |
69 | return ERR_PTR(-ENOMEM); | |
70 | ||
71 | nbytes = min_t(size_t, *count, PAGE_SIZE); | |
72 | if (copy_from_user(buf, user_buf, nbytes)) { | |
73 | free_page((unsigned long)buf); | |
74 | return ERR_PTR(-EFAULT); | |
75 | } | |
76 | ||
77 | *count = nbytes; | |
78 | return buf; | |
79 | } | |
80 | ||
81 | static bool parse_line(char **line, u32 *offs, u32 *val, int short_fmt_len, | |
82 | int long_fmt_len) | |
83 | { | |
84 | char *token; | |
85 | u32 v[5]; | |
86 | int ret; | |
87 | ||
88 | token = strsep(line, "\n"); | |
89 | if (!token) | |
90 | return false; | |
91 | ||
92 | /* | |
93 | * For Adapter/Router configuration space: | |
94 | * Short format is: offset value\n | |
95 | * v[0] v[1] | |
96 | * Long format as produced from the read side: | |
97 | * offset relative_offset cap_id vs_cap_id value\n | |
98 | * v[0] v[1] v[2] v[3] v[4] | |
99 | * | |
100 | * For Counter configuration space: | |
101 | * Short format is: offset\n | |
102 | * v[0] | |
103 | * Long format as produced from the read side: | |
104 | * offset relative_offset counter_id value\n | |
105 | * v[0] v[1] v[2] v[3] | |
106 | */ | |
107 | ret = sscanf(token, "%i %i %i %i %i", &v[0], &v[1], &v[2], &v[3], &v[4]); | |
108 | /* In case of Counters, clear counter, "val" content is NA */ | |
109 | if (ret == short_fmt_len) { | |
110 | *offs = v[0]; | |
111 | *val = v[short_fmt_len - 1]; | |
112 | return true; | |
113 | } else if (ret == long_fmt_len) { | |
114 | *offs = v[0]; | |
115 | *val = v[long_fmt_len - 1]; | |
116 | return true; | |
117 | } | |
118 | ||
119 | return false; | |
120 | } | |
121 | ||
122 | #if IS_ENABLED(CONFIG_USB4_DEBUGFS_WRITE) | |
123 | static ssize_t regs_write(struct tb_switch *sw, struct tb_port *port, | |
124 | const char __user *user_buf, size_t count, | |
125 | loff_t *ppos) | |
126 | { | |
127 | struct tb *tb = sw->tb; | |
128 | char *line, *buf; | |
129 | u32 val, offset; | |
130 | int ret = 0; | |
131 | ||
132 | buf = validate_and_copy_from_user(user_buf, &count); | |
133 | if (IS_ERR(buf)) | |
134 | return PTR_ERR(buf); | |
135 | ||
136 | pm_runtime_get_sync(&sw->dev); | |
137 | ||
138 | if (mutex_lock_interruptible(&tb->lock)) { | |
139 | ret = -ERESTARTSYS; | |
140 | goto out; | |
141 | } | |
142 | ||
143 | /* User did hardware changes behind the driver's back */ | |
144 | add_taint(TAINT_USER, LOCKDEP_STILL_OK); | |
145 | ||
146 | line = buf; | |
147 | while (parse_line(&line, &offset, &val, 2, 5)) { | |
148 | if (port) | |
149 | ret = tb_port_write(port, &val, TB_CFG_PORT, offset, 1); | |
150 | else | |
151 | ret = tb_sw_write(sw, &val, TB_CFG_SWITCH, offset, 1); | |
152 | if (ret) | |
153 | break; | |
154 | } | |
155 | ||
156 | mutex_unlock(&tb->lock); | |
157 | ||
158 | out: | |
159 | pm_runtime_mark_last_busy(&sw->dev); | |
160 | pm_runtime_put_autosuspend(&sw->dev); | |
161 | free_page((unsigned long)buf); | |
162 | ||
163 | return ret < 0 ? ret : count; | |
164 | } | |
165 | ||
166 | static ssize_t port_regs_write(struct file *file, const char __user *user_buf, | |
167 | size_t count, loff_t *ppos) | |
168 | { | |
169 | struct seq_file *s = file->private_data; | |
170 | struct tb_port *port = s->private; | |
171 | ||
172 | return regs_write(port->sw, port, user_buf, count, ppos); | |
173 | } | |
174 | ||
175 | static ssize_t switch_regs_write(struct file *file, const char __user *user_buf, | |
176 | size_t count, loff_t *ppos) | |
177 | { | |
178 | struct seq_file *s = file->private_data; | |
179 | struct tb_switch *sw = s->private; | |
180 | ||
181 | return regs_write(sw, NULL, user_buf, count, ppos); | |
182 | } | |
183 | #define DEBUGFS_MODE 0600 | |
184 | #else | |
185 | #define port_regs_write NULL | |
186 | #define switch_regs_write NULL | |
187 | #define DEBUGFS_MODE 0400 | |
188 | #endif | |
189 | ||
190 | static int port_clear_all_counters(struct tb_port *port) | |
191 | { | |
192 | u32 *buf; | |
193 | int ret; | |
194 | ||
195 | buf = kcalloc(COUNTER_SET_LEN * port->config.max_counters, sizeof(u32), | |
196 | GFP_KERNEL); | |
197 | if (!buf) | |
198 | return -ENOMEM; | |
199 | ||
200 | ret = tb_port_write(port, buf, TB_CFG_COUNTERS, 0, | |
201 | COUNTER_SET_LEN * port->config.max_counters); | |
202 | kfree(buf); | |
203 | ||
204 | return ret; | |
205 | } | |
206 | ||
207 | static ssize_t counters_write(struct file *file, const char __user *user_buf, | |
208 | size_t count, loff_t *ppos) | |
209 | { | |
210 | struct seq_file *s = file->private_data; | |
211 | struct tb_port *port = s->private; | |
212 | struct tb_switch *sw = port->sw; | |
213 | struct tb *tb = port->sw->tb; | |
214 | char *buf; | |
215 | int ret; | |
216 | ||
217 | buf = validate_and_copy_from_user(user_buf, &count); | |
218 | if (IS_ERR(buf)) | |
219 | return PTR_ERR(buf); | |
220 | ||
221 | pm_runtime_get_sync(&sw->dev); | |
222 | ||
223 | if (mutex_lock_interruptible(&tb->lock)) { | |
224 | ret = -ERESTARTSYS; | |
225 | goto out; | |
226 | } | |
227 | ||
228 | /* If written delimiter only, clear all counters in one shot */ | |
229 | if (buf[0] == '\n') { | |
230 | ret = port_clear_all_counters(port); | |
231 | } else { | |
232 | char *line = buf; | |
233 | u32 val, offset; | |
234 | ||
77e4907f | 235 | ret = -EINVAL; |
54e41810 GF |
236 | while (parse_line(&line, &offset, &val, 1, 4)) { |
237 | ret = tb_port_write(port, &val, TB_CFG_COUNTERS, | |
238 | offset, 1); | |
239 | if (ret) | |
240 | break; | |
241 | } | |
242 | } | |
243 | ||
244 | mutex_unlock(&tb->lock); | |
245 | ||
246 | out: | |
247 | pm_runtime_mark_last_busy(&sw->dev); | |
248 | pm_runtime_put_autosuspend(&sw->dev); | |
249 | free_page((unsigned long)buf); | |
250 | ||
251 | return ret < 0 ? ret : count; | |
252 | } | |
253 | ||
815f421b GF |
254 | static void cap_show_by_dw(struct seq_file *s, struct tb_switch *sw, |
255 | struct tb_port *port, unsigned int cap, | |
256 | unsigned int offset, u8 cap_id, u8 vsec_id, | |
257 | int dwords) | |
258 | { | |
259 | int i, ret; | |
260 | u32 data; | |
261 | ||
262 | for (i = 0; i < dwords; i++) { | |
263 | if (port) | |
264 | ret = tb_port_read(port, &data, TB_CFG_PORT, cap + offset + i, 1); | |
265 | else | |
266 | ret = tb_sw_read(sw, &data, TB_CFG_SWITCH, cap + offset + i, 1); | |
267 | if (ret) { | |
3382665a GF |
268 | seq_printf(s, "0x%04x <not accessible>\n", cap + offset + i); |
269 | continue; | |
815f421b GF |
270 | } |
271 | ||
272 | seq_printf(s, "0x%04x %4d 0x%02x 0x%02x 0x%08x\n", cap + offset + i, | |
273 | offset + i, cap_id, vsec_id, data); | |
274 | } | |
275 | } | |
276 | ||
54e41810 GF |
277 | static void cap_show(struct seq_file *s, struct tb_switch *sw, |
278 | struct tb_port *port, unsigned int cap, u8 cap_id, | |
279 | u8 vsec_id, int length) | |
280 | { | |
281 | int ret, offset = 0; | |
282 | ||
283 | while (length > 0) { | |
284 | int i, dwords = min(length, TB_MAX_CONFIG_RW_LENGTH); | |
285 | u32 data[TB_MAX_CONFIG_RW_LENGTH]; | |
286 | ||
287 | if (port) | |
288 | ret = tb_port_read(port, data, TB_CFG_PORT, cap + offset, | |
289 | dwords); | |
290 | else | |
291 | ret = tb_sw_read(sw, data, TB_CFG_SWITCH, cap + offset, dwords); | |
292 | if (ret) { | |
3382665a | 293 | cap_show_by_dw(s, sw, port, cap, offset, cap_id, vsec_id, length); |
54e41810 GF |
294 | return; |
295 | } | |
296 | ||
297 | for (i = 0; i < dwords; i++) { | |
298 | seq_printf(s, "0x%04x %4d 0x%02x 0x%02x 0x%08x\n", | |
299 | cap + offset + i, offset + i, | |
300 | cap_id, vsec_id, data[i]); | |
301 | } | |
302 | ||
303 | length -= dwords; | |
304 | offset += dwords; | |
305 | } | |
306 | } | |
307 | ||
308 | static void port_cap_show(struct tb_port *port, struct seq_file *s, | |
309 | unsigned int cap) | |
310 | { | |
311 | struct tb_cap_any header; | |
312 | u8 vsec_id = 0; | |
313 | size_t length; | |
314 | int ret; | |
315 | ||
316 | ret = tb_port_read(port, &header, TB_CFG_PORT, cap, 1); | |
317 | if (ret) { | |
318 | seq_printf(s, "0x%04x <capability read failed>\n", cap); | |
319 | return; | |
320 | } | |
321 | ||
322 | switch (header.basic.cap) { | |
323 | case TB_PORT_CAP_PHY: | |
324 | length = PORT_CAP_LANE_LEN; | |
325 | break; | |
326 | ||
327 | case TB_PORT_CAP_TIME1: | |
328 | length = PORT_CAP_TMU_LEN; | |
329 | break; | |
330 | ||
331 | case TB_PORT_CAP_POWER: | |
332 | length = PORT_CAP_POWER_LEN; | |
333 | break; | |
334 | ||
335 | case TB_PORT_CAP_ADAP: | |
336 | if (tb_port_is_pcie_down(port) || tb_port_is_pcie_up(port)) { | |
337 | length = PORT_CAP_PCIE_LEN; | |
338 | } else if (tb_port_is_dpin(port) || tb_port_is_dpout(port)) { | |
339 | length = PORT_CAP_DP_LEN; | |
340 | } else if (tb_port_is_usb3_down(port) || | |
341 | tb_port_is_usb3_up(port)) { | |
342 | length = PORT_CAP_USB3_LEN; | |
343 | } else { | |
344 | seq_printf(s, "0x%04x <unsupported capability 0x%02x>\n", | |
345 | cap, header.basic.cap); | |
346 | return; | |
347 | } | |
348 | break; | |
349 | ||
350 | case TB_PORT_CAP_VSE: | |
351 | if (!header.extended_short.length) { | |
352 | ret = tb_port_read(port, (u32 *)&header + 1, TB_CFG_PORT, | |
353 | cap + 1, 1); | |
354 | if (ret) { | |
355 | seq_printf(s, "0x%04x <capability read failed>\n", | |
356 | cap + 1); | |
357 | return; | |
358 | } | |
359 | length = header.extended_long.length; | |
360 | vsec_id = header.extended_short.vsec_id; | |
361 | } else { | |
362 | length = header.extended_short.length; | |
363 | vsec_id = header.extended_short.vsec_id; | |
54e41810 GF |
364 | } |
365 | break; | |
366 | ||
367 | case TB_PORT_CAP_USB4: | |
368 | length = PORT_CAP_USB4_LEN; | |
369 | break; | |
370 | ||
371 | default: | |
372 | seq_printf(s, "0x%04x <unsupported capability 0x%02x>\n", | |
373 | cap, header.basic.cap); | |
374 | return; | |
375 | } | |
376 | ||
377 | cap_show(s, NULL, port, cap, header.basic.cap, vsec_id, length); | |
378 | } | |
379 | ||
380 | static void port_caps_show(struct tb_port *port, struct seq_file *s) | |
381 | { | |
382 | int cap; | |
383 | ||
384 | cap = tb_port_next_cap(port, 0); | |
385 | while (cap > 0) { | |
386 | port_cap_show(port, s, cap); | |
387 | cap = tb_port_next_cap(port, cap); | |
388 | } | |
389 | } | |
390 | ||
391 | static int port_basic_regs_show(struct tb_port *port, struct seq_file *s) | |
392 | { | |
393 | u32 data[PORT_CAP_BASIC_LEN]; | |
394 | int ret, i; | |
395 | ||
396 | ret = tb_port_read(port, data, TB_CFG_PORT, 0, ARRAY_SIZE(data)); | |
397 | if (ret) | |
398 | return ret; | |
399 | ||
400 | for (i = 0; i < ARRAY_SIZE(data); i++) | |
401 | seq_printf(s, "0x%04x %4d 0x00 0x00 0x%08x\n", i, i, data[i]); | |
402 | ||
403 | return 0; | |
404 | } | |
405 | ||
406 | static int port_regs_show(struct seq_file *s, void *not_used) | |
407 | { | |
408 | struct tb_port *port = s->private; | |
409 | struct tb_switch *sw = port->sw; | |
410 | struct tb *tb = sw->tb; | |
411 | int ret; | |
412 | ||
413 | pm_runtime_get_sync(&sw->dev); | |
414 | ||
415 | if (mutex_lock_interruptible(&tb->lock)) { | |
416 | ret = -ERESTARTSYS; | |
417 | goto out_rpm_put; | |
418 | } | |
419 | ||
420 | seq_puts(s, "# offset relative_offset cap_id vs_cap_id value\n"); | |
421 | ||
422 | ret = port_basic_regs_show(port, s); | |
423 | if (ret) | |
424 | goto out_unlock; | |
425 | ||
426 | port_caps_show(port, s); | |
427 | ||
428 | out_unlock: | |
429 | mutex_unlock(&tb->lock); | |
430 | out_rpm_put: | |
431 | pm_runtime_mark_last_busy(&sw->dev); | |
432 | pm_runtime_put_autosuspend(&sw->dev); | |
433 | ||
434 | return ret; | |
435 | } | |
436 | DEBUGFS_ATTR_RW(port_regs); | |
437 | ||
438 | static void switch_cap_show(struct tb_switch *sw, struct seq_file *s, | |
439 | unsigned int cap) | |
440 | { | |
441 | struct tb_cap_any header; | |
442 | int ret, length; | |
443 | u8 vsec_id = 0; | |
444 | ||
445 | ret = tb_sw_read(sw, &header, TB_CFG_SWITCH, cap, 1); | |
446 | if (ret) { | |
447 | seq_printf(s, "0x%04x <capability read failed>\n", cap); | |
448 | return; | |
449 | } | |
450 | ||
451 | if (header.basic.cap == TB_SWITCH_CAP_VSE) { | |
452 | if (!header.extended_short.length) { | |
453 | ret = tb_sw_read(sw, (u32 *)&header + 1, TB_CFG_SWITCH, | |
454 | cap + 1, 1); | |
455 | if (ret) { | |
456 | seq_printf(s, "0x%04x <capability read failed>\n", | |
457 | cap + 1); | |
458 | return; | |
459 | } | |
460 | length = header.extended_long.length; | |
461 | } else { | |
462 | length = header.extended_short.length; | |
463 | } | |
464 | vsec_id = header.extended_short.vsec_id; | |
465 | } else { | |
466 | if (header.basic.cap == TB_SWITCH_CAP_TMU) { | |
467 | length = SWITCH_CAP_TMU_LEN; | |
468 | } else { | |
469 | seq_printf(s, "0x%04x <unknown capability 0x%02x>\n", | |
470 | cap, header.basic.cap); | |
471 | return; | |
472 | } | |
473 | } | |
474 | ||
475 | cap_show(s, sw, NULL, cap, header.basic.cap, vsec_id, length); | |
476 | } | |
477 | ||
478 | static void switch_caps_show(struct tb_switch *sw, struct seq_file *s) | |
479 | { | |
480 | int cap; | |
481 | ||
482 | cap = tb_switch_next_cap(sw, 0); | |
483 | while (cap > 0) { | |
484 | switch_cap_show(sw, s, cap); | |
485 | cap = tb_switch_next_cap(sw, cap); | |
486 | } | |
487 | } | |
488 | ||
489 | static int switch_basic_regs_show(struct tb_switch *sw, struct seq_file *s) | |
490 | { | |
491 | u32 data[SWITCH_CAP_BASIC_LEN]; | |
492 | size_t dwords; | |
493 | int ret, i; | |
494 | ||
495 | /* Only USB4 has the additional registers */ | |
496 | if (tb_switch_is_usb4(sw)) | |
497 | dwords = ARRAY_SIZE(data); | |
498 | else | |
499 | dwords = 7; | |
500 | ||
501 | ret = tb_sw_read(sw, data, TB_CFG_SWITCH, 0, dwords); | |
502 | if (ret) | |
503 | return ret; | |
504 | ||
505 | for (i = 0; i < dwords; i++) | |
506 | seq_printf(s, "0x%04x %4d 0x00 0x00 0x%08x\n", i, i, data[i]); | |
507 | ||
508 | return 0; | |
509 | } | |
510 | ||
511 | static int switch_regs_show(struct seq_file *s, void *not_used) | |
512 | { | |
513 | struct tb_switch *sw = s->private; | |
514 | struct tb *tb = sw->tb; | |
515 | int ret; | |
516 | ||
517 | pm_runtime_get_sync(&sw->dev); | |
518 | ||
519 | if (mutex_lock_interruptible(&tb->lock)) { | |
520 | ret = -ERESTARTSYS; | |
521 | goto out_rpm_put; | |
522 | } | |
523 | ||
524 | seq_puts(s, "# offset relative_offset cap_id vs_cap_id value\n"); | |
525 | ||
526 | ret = switch_basic_regs_show(sw, s); | |
527 | if (ret) | |
528 | goto out_unlock; | |
529 | ||
530 | switch_caps_show(sw, s); | |
531 | ||
532 | out_unlock: | |
533 | mutex_unlock(&tb->lock); | |
534 | out_rpm_put: | |
535 | pm_runtime_mark_last_busy(&sw->dev); | |
536 | pm_runtime_put_autosuspend(&sw->dev); | |
537 | ||
538 | return ret; | |
539 | } | |
540 | DEBUGFS_ATTR_RW(switch_regs); | |
541 | ||
542 | static int path_show_one(struct tb_port *port, struct seq_file *s, int hopid) | |
543 | { | |
544 | u32 data[PATH_LEN]; | |
545 | int ret, i; | |
546 | ||
547 | ret = tb_port_read(port, data, TB_CFG_HOPS, hopid * PATH_LEN, | |
548 | ARRAY_SIZE(data)); | |
549 | if (ret) { | |
550 | seq_printf(s, "0x%04x <not accessible>\n", hopid * PATH_LEN); | |
551 | return ret; | |
552 | } | |
553 | ||
554 | for (i = 0; i < ARRAY_SIZE(data); i++) { | |
555 | seq_printf(s, "0x%04x %4d 0x%02x 0x%08x\n", | |
556 | hopid * PATH_LEN + i, i, hopid, data[i]); | |
557 | } | |
558 | ||
559 | return 0; | |
560 | } | |
561 | ||
562 | static int path_show(struct seq_file *s, void *not_used) | |
563 | { | |
564 | struct tb_port *port = s->private; | |
565 | struct tb_switch *sw = port->sw; | |
566 | struct tb *tb = sw->tb; | |
567 | int start, i, ret = 0; | |
568 | ||
569 | pm_runtime_get_sync(&sw->dev); | |
570 | ||
571 | if (mutex_lock_interruptible(&tb->lock)) { | |
572 | ret = -ERESTARTSYS; | |
573 | goto out_rpm_put; | |
574 | } | |
575 | ||
576 | seq_puts(s, "# offset relative_offset in_hop_id value\n"); | |
577 | ||
578 | /* NHI and lane adapters have entry for path 0 */ | |
579 | if (tb_port_is_null(port) || tb_port_is_nhi(port)) { | |
580 | ret = path_show_one(port, s, 0); | |
581 | if (ret) | |
582 | goto out_unlock; | |
583 | } | |
584 | ||
585 | start = tb_port_is_nhi(port) ? 1 : TB_PATH_MIN_HOPID; | |
586 | ||
587 | for (i = start; i <= port->config.max_in_hop_id; i++) { | |
588 | ret = path_show_one(port, s, i); | |
589 | if (ret) | |
590 | break; | |
591 | } | |
592 | ||
593 | out_unlock: | |
594 | mutex_unlock(&tb->lock); | |
595 | out_rpm_put: | |
596 | pm_runtime_mark_last_busy(&sw->dev); | |
597 | pm_runtime_put_autosuspend(&sw->dev); | |
598 | ||
599 | return ret; | |
600 | } | |
601 | DEBUGFS_ATTR_RO(path); | |
602 | ||
603 | static int counter_set_regs_show(struct tb_port *port, struct seq_file *s, | |
604 | int counter) | |
605 | { | |
606 | u32 data[COUNTER_SET_LEN]; | |
607 | int ret, i; | |
608 | ||
609 | ret = tb_port_read(port, data, TB_CFG_COUNTERS, | |
610 | counter * COUNTER_SET_LEN, ARRAY_SIZE(data)); | |
611 | if (ret) { | |
612 | seq_printf(s, "0x%04x <not accessible>\n", | |
613 | counter * COUNTER_SET_LEN); | |
614 | return ret; | |
615 | } | |
616 | ||
617 | for (i = 0; i < ARRAY_SIZE(data); i++) { | |
618 | seq_printf(s, "0x%04x %4d 0x%02x 0x%08x\n", | |
619 | counter * COUNTER_SET_LEN + i, i, counter, data[i]); | |
620 | } | |
621 | ||
622 | return 0; | |
623 | } | |
624 | ||
625 | static int counters_show(struct seq_file *s, void *not_used) | |
626 | { | |
627 | struct tb_port *port = s->private; | |
628 | struct tb_switch *sw = port->sw; | |
629 | struct tb *tb = sw->tb; | |
630 | int i, ret = 0; | |
631 | ||
632 | pm_runtime_get_sync(&sw->dev); | |
633 | ||
634 | if (mutex_lock_interruptible(&tb->lock)) { | |
635 | ret = -ERESTARTSYS; | |
636 | goto out; | |
637 | } | |
638 | ||
639 | seq_puts(s, "# offset relative_offset counter_id value\n"); | |
640 | ||
641 | for (i = 0; i < port->config.max_counters; i++) { | |
642 | ret = counter_set_regs_show(port, s, i); | |
643 | if (ret) | |
644 | break; | |
645 | } | |
646 | ||
647 | mutex_unlock(&tb->lock); | |
648 | ||
649 | out: | |
650 | pm_runtime_mark_last_busy(&sw->dev); | |
651 | pm_runtime_put_autosuspend(&sw->dev); | |
652 | ||
653 | return ret; | |
654 | } | |
655 | DEBUGFS_ATTR_RW(counters); | |
656 | ||
657 | /** | |
658 | * tb_switch_debugfs_init() - Add debugfs entries for router | |
659 | * @sw: Pointer to the router | |
660 | * | |
661 | * Adds debugfs directories and files for given router. | |
662 | */ | |
663 | void tb_switch_debugfs_init(struct tb_switch *sw) | |
664 | { | |
665 | struct dentry *debugfs_dir; | |
666 | struct tb_port *port; | |
667 | ||
668 | debugfs_dir = debugfs_create_dir(dev_name(&sw->dev), tb_debugfs_root); | |
669 | sw->debugfs_dir = debugfs_dir; | |
670 | debugfs_create_file("regs", DEBUGFS_MODE, debugfs_dir, sw, | |
671 | &switch_regs_fops); | |
672 | ||
673 | tb_switch_for_each_port(sw, port) { | |
674 | struct dentry *debugfs_dir; | |
675 | char dir_name[10]; | |
676 | ||
677 | if (port->disabled) | |
678 | continue; | |
679 | if (port->config.type == TB_TYPE_INACTIVE) | |
680 | continue; | |
681 | ||
682 | snprintf(dir_name, sizeof(dir_name), "port%d", port->port); | |
683 | debugfs_dir = debugfs_create_dir(dir_name, sw->debugfs_dir); | |
684 | debugfs_create_file("regs", DEBUGFS_MODE, debugfs_dir, | |
685 | port, &port_regs_fops); | |
686 | debugfs_create_file("path", 0400, debugfs_dir, port, | |
687 | &path_fops); | |
688 | if (port->config.counters_support) | |
689 | debugfs_create_file("counters", 0600, debugfs_dir, port, | |
690 | &counters_fops); | |
691 | } | |
692 | } | |
693 | ||
694 | /** | |
695 | * tb_switch_debugfs_remove() - Remove all router debugfs entries | |
696 | * @sw: Pointer to the router | |
697 | * | |
698 | * Removes all previously added debugfs entries under this router. | |
699 | */ | |
700 | void tb_switch_debugfs_remove(struct tb_switch *sw) | |
701 | { | |
702 | debugfs_remove_recursive(sw->debugfs_dir); | |
703 | } | |
704 | ||
407ac931 MW |
705 | /** |
706 | * tb_service_debugfs_init() - Add debugfs directory for service | |
707 | * @svc: Thunderbolt service pointer | |
708 | * | |
709 | * Adds debugfs directory for service. | |
710 | */ | |
711 | void tb_service_debugfs_init(struct tb_service *svc) | |
712 | { | |
713 | svc->debugfs_dir = debugfs_create_dir(dev_name(&svc->dev), | |
714 | tb_debugfs_root); | |
715 | } | |
716 | ||
717 | /** | |
718 | * tb_service_debugfs_remove() - Remove service debugfs directory | |
719 | * @svc: Thunderbolt service pointer | |
720 | * | |
721 | * Removes the previously created debugfs directory for @svc. | |
722 | */ | |
723 | void tb_service_debugfs_remove(struct tb_service *svc) | |
724 | { | |
725 | debugfs_remove_recursive(svc->debugfs_dir); | |
726 | svc->debugfs_dir = NULL; | |
727 | } | |
728 | ||
54e41810 GF |
729 | void tb_debugfs_init(void) |
730 | { | |
731 | tb_debugfs_root = debugfs_create_dir("thunderbolt", NULL); | |
732 | } | |
733 | ||
734 | void tb_debugfs_exit(void) | |
735 | { | |
736 | debugfs_remove_recursive(tb_debugfs_root); | |
737 | } |