Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
1/*
2 * Intel SOC Telemetry debugfs Driver: Currently supports APL
3 * Copyright (c) 2015, Intel Corporation.
4 * All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * This file provides the debugfs interfaces for telemetry.
16 * /sys/kernel/debug/telemetry/pss_info: Shows Primary Control Sub-Sys Counters
17 * /sys/kernel/debug/telemetry/ioss_info: Shows IO Sub-System Counters
18 * /sys/kernel/debug/telemetry/soc_states: Shows SoC State
19 * /sys/kernel/debug/telemetry/pss_trace_verbosity: Read and Change Tracing
20 * Verbosity via firmware
21 * /sys/kernel/debug/telemetry/ioss_race_verbosity: Write and Change Tracing
22 * Verbosity via firmware
23 */
24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/device.h>
27#include <linux/debugfs.h>
28#include <linux/seq_file.h>
29#include <linux/io.h>
30#include <linux/uaccess.h>
31#include <linux/pci.h>
32#include <linux/suspend.h>
33
34#include <asm/cpu_device_id.h>
35#include <asm/intel_pmc_ipc.h>
36#include <asm/intel_punit_ipc.h>
37#include <asm/intel_telemetry.h>
38
39#define DRIVER_NAME "telemetry_soc_debugfs"
40#define DRIVER_VERSION "1.0.0"
41
42/* ApolloLake SoC Event-IDs */
43#define TELEM_APL_PSS_PSTATES_ID 0x2802
44#define TELEM_APL_PSS_IDLE_ID 0x2806
45#define TELEM_APL_PCS_IDLE_BLOCKED_ID 0x2C00
46#define TELEM_APL_PCS_S0IX_BLOCKED_ID 0x2C01
47#define TELEM_APL_PSS_WAKEUP_ID 0x2C02
48#define TELEM_APL_PSS_LTR_BLOCKING_ID 0x2C03
49
50#define TELEM_APL_S0IX_TOTAL_OCC_ID 0x4000
51#define TELEM_APL_S0IX_SHLW_OCC_ID 0x4001
52#define TELEM_APL_S0IX_DEEP_OCC_ID 0x4002
53#define TELEM_APL_S0IX_TOTAL_RES_ID 0x4800
54#define TELEM_APL_S0IX_SHLW_RES_ID 0x4801
55#define TELEM_APL_S0IX_DEEP_RES_ID 0x4802
56#define TELEM_APL_D0IX_ID 0x581A
57#define TELEM_APL_D3_ID 0x5819
58#define TELEM_APL_PG_ID 0x5818
59
60#define TELEM_INFO_SRAMEVTS_MASK 0xFF00
61#define TELEM_INFO_SRAMEVTS_SHIFT 0x8
62#define TELEM_SSRAM_READ_TIMEOUT 10
63
64#define TELEM_MASK_BIT 1
65#define TELEM_MASK_BYTE 0xFF
66#define BYTES_PER_LONG 8
67#define TELEM_APL_MASK_PCS_STATE 0xF
68
69/* Max events in bitmap to check for */
70#define TELEM_PSS_IDLE_EVTS 25
71#define TELEM_PSS_IDLE_BLOCKED_EVTS 20
72#define TELEM_PSS_S0IX_BLOCKED_EVTS 20
73#define TELEM_PSS_S0IX_WAKEUP_EVTS 20
74#define TELEM_PSS_LTR_BLOCKING_EVTS 20
75#define TELEM_IOSS_DX_D0IX_EVTS 25
76#define TELEM_IOSS_PG_EVTS 30
77
78#define TELEM_EVT_LEN(x) (sizeof(x)/sizeof((x)[0]))
79
80#define TELEM_DEBUGFS_CPU(model, data) \
81 { X86_VENDOR_INTEL, 6, model, X86_FEATURE_MWAIT, (unsigned long)&data}
82
83#define TELEM_CHECK_AND_PARSE_EVTS(EVTID, EVTNUM, BUF, EVTLOG, EVTDAT, MASK) { \
84 if (evtlog[index].telem_evtid == (EVTID)) { \
85 for (idx = 0; idx < (EVTNUM); idx++) \
86 (BUF)[idx] = ((EVTLOG) >> (EVTDAT)[idx].bit_pos) & \
87 (MASK); \
88 continue; \
89 } \
90}
91
92#define TELEM_CHECK_AND_PARSE_CTRS(EVTID, CTR) { \
93 if (evtlog[index].telem_evtid == (EVTID)) { \
94 (CTR) = evtlog[index].telem_evtlog; \
95 continue; \
96 } \
97}
98
99#ifdef CONFIG_PM_SLEEP
100static u8 suspend_prep_ok;
101static u32 suspend_shlw_ctr_temp, suspend_deep_ctr_temp;
102static u64 suspend_shlw_res_temp, suspend_deep_res_temp;
103#endif
104
105struct telemetry_susp_stats {
106 u32 shlw_swake_ctr;
107 u32 deep_swake_ctr;
108 u64 shlw_swake_res;
109 u64 deep_swake_res;
110 u32 shlw_ctr;
111 u32 deep_ctr;
112 u64 shlw_res;
113 u64 deep_res;
114};
115
116/* Bitmap definitions for default counters in APL */
117struct telem_pss_idle_stateinfo {
118 const char *name;
119 u32 bit_pos;
120};
121
122static struct telem_pss_idle_stateinfo telem_apl_pss_idle_data[] = {
123 {"IA_CORE0_C1E", 0},
124 {"IA_CORE1_C1E", 1},
125 {"IA_CORE2_C1E", 2},
126 {"IA_CORE3_C1E", 3},
127 {"IA_CORE0_C6", 16},
128 {"IA_CORE1_C6", 17},
129 {"IA_CORE2_C6", 18},
130 {"IA_CORE3_C6", 19},
131 {"IA_MODULE0_C7", 32},
132 {"IA_MODULE1_C7", 33},
133 {"GT_RC6", 40},
134 {"IUNIT_PROCESSING_IDLE", 41},
135 {"FAR_MEM_IDLE", 43},
136 {"DISPLAY_IDLE", 44},
137 {"IUNIT_INPUT_SYSTEM_IDLE", 45},
138 {"PCS_STATUS", 60},
139};
140
141struct telem_pcs_blkd_info {
142 const char *name;
143 u32 bit_pos;
144};
145
146static struct telem_pcs_blkd_info telem_apl_pcs_idle_blkd_data[] = {
147 {"COMPUTE", 0},
148 {"MISC", 8},
149 {"MODULE_ACTIONS_PENDING", 16},
150 {"LTR", 24},
151 {"DISPLAY_WAKE", 32},
152 {"ISP_WAKE", 40},
153 {"PSF0_ACTIVE", 48},
154};
155
156static struct telem_pcs_blkd_info telem_apl_pcs_s0ix_blkd_data[] = {
157 {"LTR", 0},
158 {"IRTL", 8},
159 {"WAKE_DEADLINE_PENDING", 16},
160 {"DISPLAY", 24},
161 {"ISP", 32},
162 {"CORE", 40},
163 {"PMC", 48},
164 {"MISC", 56},
165};
166
167struct telem_pss_ltr_info {
168 const char *name;
169 u32 bit_pos;
170};
171
172static struct telem_pss_ltr_info telem_apl_pss_ltr_data[] = {
173 {"CORE_ACTIVE", 0},
174 {"MEM_UP", 8},
175 {"DFX", 16},
176 {"DFX_FORCE_LTR", 24},
177 {"DISPLAY", 32},
178 {"ISP", 40},
179 {"SOUTH", 48},
180};
181
182struct telem_pss_wakeup_info {
183 const char *name;
184 u32 bit_pos;
185};
186
187static struct telem_pss_wakeup_info telem_apl_pss_wakeup[] = {
188 {"IP_IDLE", 0},
189 {"DISPLAY_WAKE", 8},
190 {"VOLTAGE_REG_INT", 16},
191 {"DROWSY_TIMER (HOTPLUG)", 24},
192 {"CORE_WAKE", 32},
193 {"MISC_S0IX", 40},
194 {"MISC_ABORT", 56},
195};
196
197struct telem_ioss_d0ix_stateinfo {
198 const char *name;
199 u32 bit_pos;
200};
201
202static struct telem_ioss_d0ix_stateinfo telem_apl_ioss_d0ix_data[] = {
203 {"CSE", 0},
204 {"SCC2", 1},
205 {"GMM", 2},
206 {"XDCI", 3},
207 {"XHCI", 4},
208 {"ISH", 5},
209 {"AVS", 6},
210 {"PCIE0P1", 7},
211 {"PECI0P0", 8},
212 {"LPSS", 9},
213 {"SCC", 10},
214 {"PWM", 11},
215 {"PCIE1_P3", 12},
216 {"PCIE1_P2", 13},
217 {"PCIE1_P1", 14},
218 {"PCIE1_P0", 15},
219 {"CNV", 16},
220 {"SATA", 17},
221 {"PRTC", 18},
222};
223
224struct telem_ioss_pg_info {
225 const char *name;
226 u32 bit_pos;
227};
228
229static struct telem_ioss_pg_info telem_apl_ioss_pg_data[] = {
230 {"LPSS", 0},
231 {"SCC", 1},
232 {"P2SB", 2},
233 {"SCC2", 3},
234 {"GMM", 4},
235 {"PCIE0", 5},
236 {"XDCI", 6},
237 {"xHCI", 7},
238 {"CSE", 8},
239 {"SPI", 9},
240 {"AVSPGD4", 10},
241 {"AVSPGD3", 11},
242 {"AVSPGD2", 12},
243 {"AVSPGD1", 13},
244 {"ISH", 14},
245 {"EXI", 15},
246 {"NPKVRC", 16},
247 {"NPKVNN", 17},
248 {"CUNIT", 18},
249 {"FUSE_CTRL", 19},
250 {"PCIE1", 20},
251 {"CNV", 21},
252 {"LPC", 22},
253 {"SATA", 23},
254 {"SMB", 24},
255 {"PRTC", 25},
256};
257
258
259struct telemetry_debugfs_conf {
260 struct telemetry_susp_stats suspend_stats;
261 struct dentry *telemetry_dbg_dir;
262
263 /* Bitmap Data */
264 struct telem_ioss_d0ix_stateinfo *ioss_d0ix_data;
265 struct telem_pss_idle_stateinfo *pss_idle_data;
266 struct telem_pcs_blkd_info *pcs_idle_blkd_data;
267 struct telem_pcs_blkd_info *pcs_s0ix_blkd_data;
268 struct telem_pss_wakeup_info *pss_wakeup;
269 struct telem_pss_ltr_info *pss_ltr_data;
270 struct telem_ioss_pg_info *ioss_pg_data;
271 u8 pcs_idle_blkd_evts;
272 u8 pcs_s0ix_blkd_evts;
273 u8 pss_wakeup_evts;
274 u8 pss_idle_evts;
275 u8 pss_ltr_evts;
276 u8 ioss_d0ix_evts;
277 u8 ioss_pg_evts;
278
279 /* IDs */
280 u16 pss_ltr_blocking_id;
281 u16 pcs_idle_blkd_id;
282 u16 pcs_s0ix_blkd_id;
283 u16 s0ix_total_occ_id;
284 u16 s0ix_shlw_occ_id;
285 u16 s0ix_deep_occ_id;
286 u16 s0ix_total_res_id;
287 u16 s0ix_shlw_res_id;
288 u16 s0ix_deep_res_id;
289 u16 pss_wakeup_id;
290 u16 ioss_d0ix_id;
291 u16 pstates_id;
292 u16 pss_idle_id;
293 u16 ioss_d3_id;
294 u16 ioss_pg_id;
295};
296
297static struct telemetry_debugfs_conf *debugfs_conf;
298
299static struct telemetry_debugfs_conf telem_apl_debugfs_conf = {
300 .pss_idle_data = telem_apl_pss_idle_data,
301 .pcs_idle_blkd_data = telem_apl_pcs_idle_blkd_data,
302 .pcs_s0ix_blkd_data = telem_apl_pcs_s0ix_blkd_data,
303 .pss_ltr_data = telem_apl_pss_ltr_data,
304 .pss_wakeup = telem_apl_pss_wakeup,
305 .ioss_d0ix_data = telem_apl_ioss_d0ix_data,
306 .ioss_pg_data = telem_apl_ioss_pg_data,
307
308 .pss_idle_evts = TELEM_EVT_LEN(telem_apl_pss_idle_data),
309 .pcs_idle_blkd_evts = TELEM_EVT_LEN(telem_apl_pcs_idle_blkd_data),
310 .pcs_s0ix_blkd_evts = TELEM_EVT_LEN(telem_apl_pcs_s0ix_blkd_data),
311 .pss_ltr_evts = TELEM_EVT_LEN(telem_apl_pss_ltr_data),
312 .pss_wakeup_evts = TELEM_EVT_LEN(telem_apl_pss_wakeup),
313 .ioss_d0ix_evts = TELEM_EVT_LEN(telem_apl_ioss_d0ix_data),
314 .ioss_pg_evts = TELEM_EVT_LEN(telem_apl_ioss_pg_data),
315
316 .pstates_id = TELEM_APL_PSS_PSTATES_ID,
317 .pss_idle_id = TELEM_APL_PSS_IDLE_ID,
318 .pcs_idle_blkd_id = TELEM_APL_PCS_IDLE_BLOCKED_ID,
319 .pcs_s0ix_blkd_id = TELEM_APL_PCS_S0IX_BLOCKED_ID,
320 .pss_wakeup_id = TELEM_APL_PSS_WAKEUP_ID,
321 .pss_ltr_blocking_id = TELEM_APL_PSS_LTR_BLOCKING_ID,
322 .s0ix_total_occ_id = TELEM_APL_S0IX_TOTAL_OCC_ID,
323 .s0ix_shlw_occ_id = TELEM_APL_S0IX_SHLW_OCC_ID,
324 .s0ix_deep_occ_id = TELEM_APL_S0IX_DEEP_OCC_ID,
325 .s0ix_total_res_id = TELEM_APL_S0IX_TOTAL_RES_ID,
326 .s0ix_shlw_res_id = TELEM_APL_S0IX_SHLW_RES_ID,
327 .s0ix_deep_res_id = TELEM_APL_S0IX_DEEP_RES_ID,
328 .ioss_d0ix_id = TELEM_APL_D0IX_ID,
329 .ioss_d3_id = TELEM_APL_D3_ID,
330 .ioss_pg_id = TELEM_APL_PG_ID,
331};
332
333static const struct x86_cpu_id telemetry_debugfs_cpu_ids[] = {
334 TELEM_DEBUGFS_CPU(0x5c, telem_apl_debugfs_conf),
335 {}
336};
337
338MODULE_DEVICE_TABLE(x86cpu, telemetry_debugfs_cpu_ids);
339
340static int telemetry_debugfs_check_evts(void)
341{
342 if ((debugfs_conf->pss_idle_evts > TELEM_PSS_IDLE_EVTS) ||
343 (debugfs_conf->pcs_idle_blkd_evts > TELEM_PSS_IDLE_BLOCKED_EVTS) ||
344 (debugfs_conf->pcs_s0ix_blkd_evts > TELEM_PSS_S0IX_BLOCKED_EVTS) ||
345 (debugfs_conf->pss_ltr_evts > TELEM_PSS_LTR_BLOCKING_EVTS) ||
346 (debugfs_conf->pss_wakeup_evts > TELEM_PSS_S0IX_WAKEUP_EVTS) ||
347 (debugfs_conf->ioss_d0ix_evts > TELEM_IOSS_DX_D0IX_EVTS) ||
348 (debugfs_conf->ioss_pg_evts > TELEM_IOSS_PG_EVTS))
349 return -EINVAL;
350
351 return 0;
352}
353
354static int telem_pss_states_show(struct seq_file *s, void *unused)
355{
356 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
357 struct telemetry_debugfs_conf *conf = debugfs_conf;
358 const char *name[TELEM_MAX_OS_ALLOCATED_EVENTS];
359 u32 pcs_idle_blkd[TELEM_PSS_IDLE_BLOCKED_EVTS],
360 pcs_s0ix_blkd[TELEM_PSS_S0IX_BLOCKED_EVTS],
361 pss_s0ix_wakeup[TELEM_PSS_S0IX_WAKEUP_EVTS],
362 pss_ltr_blkd[TELEM_PSS_LTR_BLOCKING_EVTS],
363 pss_idle[TELEM_PSS_IDLE_EVTS];
364 int index, idx, ret, err = 0;
365 u64 pstates = 0;
366
367 ret = telemetry_read_eventlog(TELEM_PSS, evtlog,
368 TELEM_MAX_OS_ALLOCATED_EVENTS);
369 if (ret < 0)
370 return ret;
371
372 err = telemetry_get_evtname(TELEM_PSS, name,
373 TELEM_MAX_OS_ALLOCATED_EVENTS);
374 if (err < 0)
375 return err;
376
377 seq_puts(s, "\n----------------------------------------------------\n");
378 seq_puts(s, "\tPSS TELEM EVENTLOG (Residency = field/19.2 us\n");
379 seq_puts(s, "----------------------------------------------------\n");
380 for (index = 0; index < ret; index++) {
381 seq_printf(s, "%-32s %llu\n",
382 name[index], evtlog[index].telem_evtlog);
383
384 /* Fetch PSS IDLE State */
385 if (evtlog[index].telem_evtid == conf->pss_idle_id) {
386 pss_idle[conf->pss_idle_evts - 1] =
387 (evtlog[index].telem_evtlog >>
388 conf->pss_idle_data[conf->pss_idle_evts - 1].bit_pos) &
389 TELEM_APL_MASK_PCS_STATE;
390 }
391
392
393 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_idle_id,
394 conf->pss_idle_evts - 1,
395 pss_idle, evtlog[index].telem_evtlog,
396 conf->pss_idle_data, TELEM_MASK_BIT);
397
398 TELEM_CHECK_AND_PARSE_EVTS(conf->pcs_idle_blkd_id,
399 conf->pcs_idle_blkd_evts,
400 pcs_idle_blkd,
401 evtlog[index].telem_evtlog,
402 conf->pcs_idle_blkd_data,
403 TELEM_MASK_BYTE);
404
405 TELEM_CHECK_AND_PARSE_EVTS(conf->pcs_s0ix_blkd_id,
406 conf->pcs_s0ix_blkd_evts,
407 pcs_s0ix_blkd,
408 evtlog[index].telem_evtlog,
409 conf->pcs_s0ix_blkd_data,
410 TELEM_MASK_BYTE);
411
412
413 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_wakeup_id,
414 conf->pss_wakeup_evts,
415 pss_s0ix_wakeup,
416 evtlog[index].telem_evtlog,
417 conf->pss_wakeup, TELEM_MASK_BYTE);
418
419 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_ltr_blocking_id,
420 conf->pss_ltr_evts, pss_ltr_blkd,
421 evtlog[index].telem_evtlog,
422 conf->pss_ltr_data, TELEM_MASK_BYTE);
423
424 if (evtlog[index].telem_evtid == debugfs_conf->pstates_id)
425 pstates = evtlog[index].telem_evtlog;
426 }
427
428 seq_puts(s, "\n--------------------------------------\n");
429 seq_puts(s, "PStates\n");
430 seq_puts(s, "--------------------------------------\n");
431 seq_puts(s, "Domain\t\t\t\tFreq(Mhz)\n");
432 seq_printf(s, " IA\t\t\t\t %llu\n GT\t\t\t\t %llu\n",
433 (pstates & TELEM_MASK_BYTE)*100,
434 ((pstates >> 8) & TELEM_MASK_BYTE)*50/3);
435
436 seq_printf(s, " IUNIT\t\t\t\t %llu\n SA\t\t\t\t %llu\n",
437 ((pstates >> 16) & TELEM_MASK_BYTE)*25,
438 ((pstates >> 24) & TELEM_MASK_BYTE)*50/3);
439
440 seq_puts(s, "\n--------------------------------------\n");
441 seq_puts(s, "PSS IDLE Status\n");
442 seq_puts(s, "--------------------------------------\n");
443 seq_puts(s, "Device\t\t\t\t\tIDLE\n");
444 for (index = 0; index < debugfs_conf->pss_idle_evts; index++) {
445 seq_printf(s, "%-32s\t%u\n",
446 debugfs_conf->pss_idle_data[index].name,
447 pss_idle[index]);
448 }
449
450 seq_puts(s, "\n--------------------------------------\n");
451 seq_puts(s, "PSS Idle blkd Status (~1ms saturating bucket)\n");
452 seq_puts(s, "--------------------------------------\n");
453 seq_puts(s, "Blocker\t\t\t\t\tCount\n");
454 for (index = 0; index < debugfs_conf->pcs_idle_blkd_evts; index++) {
455 seq_printf(s, "%-32s\t%u\n",
456 debugfs_conf->pcs_idle_blkd_data[index].name,
457 pcs_idle_blkd[index]);
458 }
459
460 seq_puts(s, "\n--------------------------------------\n");
461 seq_puts(s, "PSS S0ix blkd Status (~1ms saturating bucket)\n");
462 seq_puts(s, "--------------------------------------\n");
463 seq_puts(s, "Blocker\t\t\t\t\tCount\n");
464 for (index = 0; index < debugfs_conf->pcs_s0ix_blkd_evts; index++) {
465 seq_printf(s, "%-32s\t%u\n",
466 debugfs_conf->pcs_s0ix_blkd_data[index].name,
467 pcs_s0ix_blkd[index]);
468 }
469
470 seq_puts(s, "\n--------------------------------------\n");
471 seq_puts(s, "LTR Blocking Status (~1ms saturating bucket)\n");
472 seq_puts(s, "--------------------------------------\n");
473 seq_puts(s, "Blocker\t\t\t\t\tCount\n");
474 for (index = 0; index < debugfs_conf->pss_ltr_evts; index++) {
475 seq_printf(s, "%-32s\t%u\n",
476 debugfs_conf->pss_ltr_data[index].name,
477 pss_s0ix_wakeup[index]);
478 }
479
480 seq_puts(s, "\n--------------------------------------\n");
481 seq_puts(s, "Wakes Status (~1ms saturating bucket)\n");
482 seq_puts(s, "--------------------------------------\n");
483 seq_puts(s, "Wakes\t\t\t\t\tCount\n");
484 for (index = 0; index < debugfs_conf->pss_wakeup_evts; index++) {
485 seq_printf(s, "%-32s\t%u\n",
486 debugfs_conf->pss_wakeup[index].name,
487 pss_ltr_blkd[index]);
488 }
489
490 return 0;
491}
492
493static int telem_pss_state_open(struct inode *inode, struct file *file)
494{
495 return single_open(file, telem_pss_states_show, inode->i_private);
496}
497
498static const struct file_operations telem_pss_ops = {
499 .open = telem_pss_state_open,
500 .read = seq_read,
501 .llseek = seq_lseek,
502 .release = single_release,
503};
504
505
506static int telem_ioss_states_show(struct seq_file *s, void *unused)
507{
508 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
509 const char *name[TELEM_MAX_OS_ALLOCATED_EVENTS];
510 int index, ret, err;
511
512 ret = telemetry_read_eventlog(TELEM_IOSS, evtlog,
513 TELEM_MAX_OS_ALLOCATED_EVENTS);
514 if (ret < 0)
515 return ret;
516
517 err = telemetry_get_evtname(TELEM_IOSS, name,
518 TELEM_MAX_OS_ALLOCATED_EVENTS);
519 if (err < 0)
520 return err;
521
522 seq_puts(s, "--------------------------------------\n");
523 seq_puts(s, "\tI0SS TELEMETRY EVENTLOG\n");
524 seq_puts(s, "--------------------------------------\n");
525 for (index = 0; index < ret; index++) {
526 seq_printf(s, "%-32s 0x%llx\n",
527 name[index], evtlog[index].telem_evtlog);
528 }
529
530 return 0;
531}
532
533static int telem_ioss_state_open(struct inode *inode, struct file *file)
534{
535 return single_open(file, telem_ioss_states_show, inode->i_private);
536}
537
538static const struct file_operations telem_ioss_ops = {
539 .open = telem_ioss_state_open,
540 .read = seq_read,
541 .llseek = seq_lseek,
542 .release = single_release,
543};
544
545static int telem_soc_states_show(struct seq_file *s, void *unused)
546{
547 u32 d3_sts[TELEM_IOSS_DX_D0IX_EVTS], d0ix_sts[TELEM_IOSS_DX_D0IX_EVTS];
548 u32 pg_sts[TELEM_IOSS_PG_EVTS], pss_idle[TELEM_PSS_IDLE_EVTS];
549 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
550 u32 s0ix_total_ctr = 0, s0ix_shlw_ctr = 0, s0ix_deep_ctr = 0;
551 u64 s0ix_total_res = 0, s0ix_shlw_res = 0, s0ix_deep_res = 0;
552 struct telemetry_debugfs_conf *conf = debugfs_conf;
553 struct pci_dev *dev = NULL;
554 int index, idx, ret;
555 u32 d3_state;
556 u16 pmcsr;
557
558 ret = telemetry_read_eventlog(TELEM_IOSS, evtlog,
559 TELEM_MAX_OS_ALLOCATED_EVENTS);
560 if (ret < 0)
561 return ret;
562
563 for (index = 0; index < ret; index++) {
564 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_d3_id,
565 conf->ioss_d0ix_evts,
566 d3_sts, evtlog[index].telem_evtlog,
567 conf->ioss_d0ix_data,
568 TELEM_MASK_BIT);
569
570 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_pg_id, conf->ioss_pg_evts,
571 pg_sts, evtlog[index].telem_evtlog,
572 conf->ioss_pg_data, TELEM_MASK_BIT);
573
574 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_d0ix_id,
575 conf->ioss_d0ix_evts,
576 d0ix_sts, evtlog[index].telem_evtlog,
577 conf->ioss_d0ix_data,
578 TELEM_MASK_BIT);
579
580 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_total_occ_id,
581 s0ix_total_ctr);
582
583 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
584 s0ix_shlw_ctr);
585
586 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
587 s0ix_deep_ctr);
588
589 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_total_res_id,
590 s0ix_total_res);
591
592 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
593 s0ix_shlw_res);
594
595 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
596 s0ix_deep_res);
597 }
598
599 seq_puts(s, "\n---------------------------------------------------\n");
600 seq_puts(s, "S0IX Type\t\t\t Occurrence\t\t Residency(us)\n");
601 seq_puts(s, "---------------------------------------------------\n");
602
603 seq_printf(s, "S0IX Shallow\t\t\t %10u\t %10llu\n",
604 s0ix_shlw_ctr -
605 conf->suspend_stats.shlw_ctr -
606 conf->suspend_stats.shlw_swake_ctr,
607 (u64)((s0ix_shlw_res -
608 conf->suspend_stats.shlw_res -
609 conf->suspend_stats.shlw_swake_res)*10/192));
610
611 seq_printf(s, "S0IX Deep\t\t\t %10u\t %10llu\n",
612 s0ix_deep_ctr -
613 conf->suspend_stats.deep_ctr -
614 conf->suspend_stats.deep_swake_ctr,
615 (u64)((s0ix_deep_res -
616 conf->suspend_stats.deep_res -
617 conf->suspend_stats.deep_swake_res)*10/192));
618
619 seq_printf(s, "Suspend(With S0ixShallow)\t %10u\t %10llu\n",
620 conf->suspend_stats.shlw_ctr,
621 (u64)(conf->suspend_stats.shlw_res*10)/192);
622
623 seq_printf(s, "Suspend(With S0ixDeep)\t\t %10u\t %10llu\n",
624 conf->suspend_stats.deep_ctr,
625 (u64)(conf->suspend_stats.deep_res*10)/192);
626
627 seq_printf(s, "Suspend(With Shallow-Wakes)\t %10u\t %10llu\n",
628 conf->suspend_stats.shlw_swake_ctr +
629 conf->suspend_stats.deep_swake_ctr,
630 (u64)((conf->suspend_stats.shlw_swake_res +
631 conf->suspend_stats.deep_swake_res)*10/192));
632
633 seq_printf(s, "S0IX+Suspend Total\t\t %10u\t %10llu\n", s0ix_total_ctr,
634 (u64)(s0ix_total_res*10/192));
635 seq_puts(s, "\n-------------------------------------------------\n");
636 seq_puts(s, "\t\tDEVICE STATES\n");
637 seq_puts(s, "-------------------------------------------------\n");
638
639 for_each_pci_dev(dev) {
640 pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr);
641 d3_state = ((pmcsr & PCI_PM_CTRL_STATE_MASK) ==
642 (__force int)PCI_D3hot) ? 1 : 0;
643
644 seq_printf(s, "pci %04x %04X %s %20.20s: ",
645 dev->vendor, dev->device, dev_name(&dev->dev),
646 dev_driver_string(&dev->dev));
647 seq_printf(s, " d3:%x\n", d3_state);
648 }
649
650 seq_puts(s, "\n--------------------------------------\n");
651 seq_puts(s, "D3/D0i3 Status\n");
652 seq_puts(s, "--------------------------------------\n");
653 seq_puts(s, "Block\t\t D3\t D0i3\n");
654 for (index = 0; index < conf->ioss_d0ix_evts; index++) {
655 seq_printf(s, "%-10s\t %u\t %u\n",
656 conf->ioss_d0ix_data[index].name,
657 d3_sts[index], d0ix_sts[index]);
658 }
659
660 seq_puts(s, "\n--------------------------------------\n");
661 seq_puts(s, "South Complex PowerGate Status\n");
662 seq_puts(s, "--------------------------------------\n");
663 seq_puts(s, "Device\t\t PG\n");
664 for (index = 0; index < conf->ioss_pg_evts; index++) {
665 seq_printf(s, "%-10s\t %u\n",
666 conf->ioss_pg_data[index].name,
667 pg_sts[index]);
668 }
669
670 evtlog->telem_evtid = conf->pss_idle_id;
671 ret = telemetry_read_events(TELEM_PSS, evtlog, 1);
672 if (ret < 0)
673 return ret;
674
675 seq_puts(s, "\n-----------------------------------------\n");
676 seq_puts(s, "North Idle Status\n");
677 seq_puts(s, "-----------------------------------------\n");
678 for (idx = 0; idx < conf->pss_idle_evts - 1; idx++) {
679 pss_idle[idx] = (evtlog->telem_evtlog >>
680 conf->pss_idle_data[idx].bit_pos) &
681 TELEM_MASK_BIT;
682 }
683
684 pss_idle[idx] = (evtlog->telem_evtlog >>
685 conf->pss_idle_data[idx].bit_pos) &
686 TELEM_APL_MASK_PCS_STATE;
687
688 for (index = 0; index < conf->pss_idle_evts; index++) {
689 seq_printf(s, "%-30s %u\n",
690 conf->pss_idle_data[index].name,
691 pss_idle[index]);
692 }
693
694 seq_puts(s, "\nPCS_STATUS Code\n");
695 seq_puts(s, "0:C0 1:C1 2:C1_DN_WT_DEV 3:C2 4:C2_WT_DE_MEM_UP\n");
696 seq_puts(s, "5:C2_WT_DE_MEM_DOWN 6:C2_UP_WT_DEV 7:C2_DN 8:C2_VOA\n");
697 seq_puts(s, "9:C2_VOA_UP 10:S0IX_PRE 11:S0IX\n");
698
699 return 0;
700}
701
702static int telem_soc_state_open(struct inode *inode, struct file *file)
703{
704 return single_open(file, telem_soc_states_show, inode->i_private);
705}
706
707static const struct file_operations telem_socstate_ops = {
708 .open = telem_soc_state_open,
709 .read = seq_read,
710 .llseek = seq_lseek,
711 .release = single_release,
712};
713
714static int telem_pss_trc_verb_show(struct seq_file *s, void *unused)
715{
716 u32 verbosity;
717 int err;
718
719 err = telemetry_get_trace_verbosity(TELEM_PSS, &verbosity);
720 if (err) {
721 pr_err("Get PSS Trace Verbosity Failed with Error %d\n", err);
722 return -EFAULT;
723 }
724
725 seq_printf(s, "PSS Trace Verbosity %u\n", verbosity);
726 return 0;
727}
728
729static ssize_t telem_pss_trc_verb_write(struct file *file,
730 const char __user *userbuf,
731 size_t count, loff_t *ppos)
732{
733 u32 verbosity;
734 int err;
735
736 if (kstrtou32_from_user(userbuf, count, 0, &verbosity))
737 return -EFAULT;
738
739 err = telemetry_set_trace_verbosity(TELEM_PSS, verbosity);
740 if (err) {
741 pr_err("Changing PSS Trace Verbosity Failed. Error %d\n", err);
742 count = err;
743 }
744
745 return count;
746}
747
748static int telem_pss_trc_verb_open(struct inode *inode, struct file *file)
749{
750 return single_open(file, telem_pss_trc_verb_show, inode->i_private);
751}
752
753static const struct file_operations telem_pss_trc_verb_ops = {
754 .open = telem_pss_trc_verb_open,
755 .read = seq_read,
756 .write = telem_pss_trc_verb_write,
757 .llseek = seq_lseek,
758 .release = single_release,
759};
760
761
762static int telem_ioss_trc_verb_show(struct seq_file *s, void *unused)
763{
764 u32 verbosity;
765 int err;
766
767 err = telemetry_get_trace_verbosity(TELEM_IOSS, &verbosity);
768 if (err) {
769 pr_err("Get IOSS Trace Verbosity Failed with Error %d\n", err);
770 return -EFAULT;
771 }
772
773 seq_printf(s, "IOSS Trace Verbosity %u\n", verbosity);
774 return 0;
775}
776
777static ssize_t telem_ioss_trc_verb_write(struct file *file,
778 const char __user *userbuf,
779 size_t count, loff_t *ppos)
780{
781 u32 verbosity;
782 int err;
783
784 if (kstrtou32_from_user(userbuf, count, 0, &verbosity))
785 return -EFAULT;
786
787 err = telemetry_set_trace_verbosity(TELEM_IOSS, verbosity);
788 if (err) {
789 pr_err("Changing IOSS Trace Verbosity Failed. Error %d\n", err);
790 count = err;
791 }
792
793 return count;
794}
795
796static int telem_ioss_trc_verb_open(struct inode *inode, struct file *file)
797{
798 return single_open(file, telem_ioss_trc_verb_show, inode->i_private);
799}
800
801static const struct file_operations telem_ioss_trc_verb_ops = {
802 .open = telem_ioss_trc_verb_open,
803 .read = seq_read,
804 .write = telem_ioss_trc_verb_write,
805 .llseek = seq_lseek,
806 .release = single_release,
807};
808
809#ifdef CONFIG_PM_SLEEP
810static int pm_suspend_prep_cb(void)
811{
812 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
813 struct telemetry_debugfs_conf *conf = debugfs_conf;
814 int ret, index;
815
816 ret = telemetry_raw_read_eventlog(TELEM_IOSS, evtlog,
817 TELEM_MAX_OS_ALLOCATED_EVENTS);
818 if (ret < 0) {
819 suspend_prep_ok = 0;
820 goto out;
821 }
822
823 for (index = 0; index < ret; index++) {
824
825 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
826 suspend_shlw_ctr_temp);
827
828 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
829 suspend_deep_ctr_temp);
830
831 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
832 suspend_shlw_res_temp);
833
834 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
835 suspend_deep_res_temp);
836 }
837 suspend_prep_ok = 1;
838out:
839 return NOTIFY_OK;
840}
841
842static int pm_suspend_exit_cb(void)
843{
844 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
845 static u32 suspend_shlw_ctr_exit, suspend_deep_ctr_exit;
846 static u64 suspend_shlw_res_exit, suspend_deep_res_exit;
847 struct telemetry_debugfs_conf *conf = debugfs_conf;
848 int ret, index;
849
850 if (!suspend_prep_ok)
851 goto out;
852
853 ret = telemetry_raw_read_eventlog(TELEM_IOSS, evtlog,
854 TELEM_MAX_OS_ALLOCATED_EVENTS);
855 if (ret < 0)
856 goto out;
857
858 for (index = 0; index < ret; index++) {
859 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
860 suspend_shlw_ctr_exit);
861
862 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
863 suspend_deep_ctr_exit);
864
865 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
866 suspend_shlw_res_exit);
867
868 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
869 suspend_deep_res_exit);
870 }
871
872 if ((suspend_shlw_ctr_exit < suspend_shlw_ctr_temp) ||
873 (suspend_deep_ctr_exit < suspend_deep_ctr_temp) ||
874 (suspend_shlw_res_exit < suspend_shlw_res_temp) ||
875 (suspend_deep_res_exit < suspend_deep_res_temp)) {
876 pr_err("Wrong s0ix counters detected\n");
877 goto out;
878 }
879
880 suspend_shlw_ctr_exit -= suspend_shlw_ctr_temp;
881 suspend_deep_ctr_exit -= suspend_deep_ctr_temp;
882 suspend_shlw_res_exit -= suspend_shlw_res_temp;
883 suspend_deep_res_exit -= suspend_deep_res_temp;
884
885 if (suspend_shlw_ctr_exit == 1) {
886 conf->suspend_stats.shlw_ctr +=
887 suspend_shlw_ctr_exit;
888
889 conf->suspend_stats.shlw_res +=
890 suspend_shlw_res_exit;
891 }
892 /* Shallow Wakes Case */
893 else if (suspend_shlw_ctr_exit > 1) {
894 conf->suspend_stats.shlw_swake_ctr +=
895 suspend_shlw_ctr_exit;
896
897 conf->suspend_stats.shlw_swake_res +=
898 suspend_shlw_res_exit;
899 }
900
901 if (suspend_deep_ctr_exit == 1) {
902 conf->suspend_stats.deep_ctr +=
903 suspend_deep_ctr_exit;
904
905 conf->suspend_stats.deep_res +=
906 suspend_deep_res_exit;
907 }
908
909 /* Shallow Wakes Case */
910 else if (suspend_deep_ctr_exit > 1) {
911 conf->suspend_stats.deep_swake_ctr +=
912 suspend_deep_ctr_exit;
913
914 conf->suspend_stats.deep_swake_res +=
915 suspend_deep_res_exit;
916 }
917
918out:
919 suspend_prep_ok = 0;
920 return NOTIFY_OK;
921}
922
923static int pm_notification(struct notifier_block *this,
924 unsigned long event, void *ptr)
925{
926 switch (event) {
927 case PM_SUSPEND_PREPARE:
928 return pm_suspend_prep_cb();
929 case PM_POST_SUSPEND:
930 return pm_suspend_exit_cb();
931 }
932
933 return NOTIFY_DONE;
934}
935
936static struct notifier_block pm_notifier = {
937 .notifier_call = pm_notification,
938};
939#endif /* CONFIG_PM_SLEEP */
940
941static int __init telemetry_debugfs_init(void)
942{
943 const struct x86_cpu_id *id;
944 int err = -ENOMEM;
945 struct dentry *f;
946
947 /* Only APL supported for now */
948 id = x86_match_cpu(telemetry_debugfs_cpu_ids);
949 if (!id)
950 return -ENODEV;
951
952 debugfs_conf = (struct telemetry_debugfs_conf *)id->driver_data;
953
954 err = telemetry_pltconfig_valid();
955 if (err < 0)
956 return -ENODEV;
957
958 err = telemetry_debugfs_check_evts();
959 if (err < 0)
960 return -EINVAL;
961
962
963#ifdef CONFIG_PM_SLEEP
964 register_pm_notifier(&pm_notifier);
965#endif /* CONFIG_PM_SLEEP */
966
967 debugfs_conf->telemetry_dbg_dir = debugfs_create_dir("telemetry", NULL);
968 if (!debugfs_conf->telemetry_dbg_dir)
969 return -ENOMEM;
970
971 f = debugfs_create_file("pss_info", S_IFREG | S_IRUGO,
972 debugfs_conf->telemetry_dbg_dir, NULL,
973 &telem_pss_ops);
974 if (!f) {
975 pr_err("pss_sample_info debugfs register failed\n");
976 goto out;
977 }
978
979 f = debugfs_create_file("ioss_info", S_IFREG | S_IRUGO,
980 debugfs_conf->telemetry_dbg_dir, NULL,
981 &telem_ioss_ops);
982 if (!f) {
983 pr_err("ioss_sample_info debugfs register failed\n");
984 goto out;
985 }
986
987 f = debugfs_create_file("soc_states", S_IFREG | S_IRUGO,
988 debugfs_conf->telemetry_dbg_dir,
989 NULL, &telem_socstate_ops);
990 if (!f) {
991 pr_err("ioss_sample_info debugfs register failed\n");
992 goto out;
993 }
994
995 f = debugfs_create_file("pss_trace_verbosity", S_IFREG | S_IRUGO,
996 debugfs_conf->telemetry_dbg_dir, NULL,
997 &telem_pss_trc_verb_ops);
998 if (!f) {
999 pr_err("pss_trace_verbosity debugfs register failed\n");
1000 goto out;
1001 }
1002
1003 f = debugfs_create_file("ioss_trace_verbosity", S_IFREG | S_IRUGO,
1004 debugfs_conf->telemetry_dbg_dir, NULL,
1005 &telem_ioss_trc_verb_ops);
1006 if (!f) {
1007 pr_err("ioss_trace_verbosity debugfs register failed\n");
1008 goto out;
1009 }
1010
1011 return 0;
1012
1013out:
1014 debugfs_remove_recursive(debugfs_conf->telemetry_dbg_dir);
1015 debugfs_conf->telemetry_dbg_dir = NULL;
1016
1017 return err;
1018}
1019
1020static void __exit telemetry_debugfs_exit(void)
1021{
1022 debugfs_remove_recursive(debugfs_conf->telemetry_dbg_dir);
1023 debugfs_conf->telemetry_dbg_dir = NULL;
1024}
1025
1026late_initcall(telemetry_debugfs_init);
1027module_exit(telemetry_debugfs_exit);
1028
1029MODULE_AUTHOR("Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>");
1030MODULE_DESCRIPTION("Intel SoC Telemetry debugfs Interface");
1031MODULE_VERSION(DRIVER_VERSION);
1032MODULE_LICENSE("GPL");