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-family.h>
36#include <asm/intel_pmc_ipc.h>
37#include <asm/intel_punit_ipc.h>
38#include <asm/intel_telemetry.h>
39
40#define DRIVER_NAME "telemetry_soc_debugfs"
41#define DRIVER_VERSION "1.0.0"
42
43/* ApolloLake SoC Event-IDs */
44#define TELEM_APL_PSS_PSTATES_ID 0x2802
45#define TELEM_APL_PSS_IDLE_ID 0x2806
46#define TELEM_APL_PCS_IDLE_BLOCKED_ID 0x2C00
47#define TELEM_APL_PCS_S0IX_BLOCKED_ID 0x2C01
48#define TELEM_APL_PSS_WAKEUP_ID 0x2C02
49#define TELEM_APL_PSS_LTR_BLOCKING_ID 0x2C03
50
51#define TELEM_APL_S0IX_TOTAL_OCC_ID 0x4000
52#define TELEM_APL_S0IX_SHLW_OCC_ID 0x4001
53#define TELEM_APL_S0IX_DEEP_OCC_ID 0x4002
54#define TELEM_APL_S0IX_TOTAL_RES_ID 0x4800
55#define TELEM_APL_S0IX_SHLW_RES_ID 0x4801
56#define TELEM_APL_S0IX_DEEP_RES_ID 0x4802
57#define TELEM_APL_D0IX_ID 0x581A
58#define TELEM_APL_D3_ID 0x5819
59#define TELEM_APL_PG_ID 0x5818
60
61#define TELEM_INFO_SRAMEVTS_MASK 0xFF00
62#define TELEM_INFO_SRAMEVTS_SHIFT 0x8
63#define TELEM_SSRAM_READ_TIMEOUT 10
64
65#define TELEM_MASK_BIT 1
66#define TELEM_MASK_BYTE 0xFF
67#define BYTES_PER_LONG 8
68#define TELEM_APL_MASK_PCS_STATE 0xF
69
70/* Max events in bitmap to check for */
71#define TELEM_PSS_IDLE_EVTS 25
72#define TELEM_PSS_IDLE_BLOCKED_EVTS 20
73#define TELEM_PSS_S0IX_BLOCKED_EVTS 20
74#define TELEM_PSS_S0IX_WAKEUP_EVTS 20
75#define TELEM_PSS_LTR_BLOCKING_EVTS 20
76#define TELEM_IOSS_DX_D0IX_EVTS 25
77#define TELEM_IOSS_PG_EVTS 30
78
79#define TELEM_EVT_LEN(x) (sizeof(x)/sizeof((x)[0]))
80
81#define TELEM_DEBUGFS_CPU(model, data) \
82 { X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, (unsigned long)&data}
83
84#define TELEM_CHECK_AND_PARSE_EVTS(EVTID, EVTNUM, BUF, EVTLOG, EVTDAT, MASK) { \
85 if (evtlog[index].telem_evtid == (EVTID)) { \
86 for (idx = 0; idx < (EVTNUM); idx++) \
87 (BUF)[idx] = ((EVTLOG) >> (EVTDAT)[idx].bit_pos) & \
88 (MASK); \
89 continue; \
90 } \
91}
92
93#define TELEM_CHECK_AND_PARSE_CTRS(EVTID, CTR) { \
94 if (evtlog[index].telem_evtid == (EVTID)) { \
95 (CTR) = evtlog[index].telem_evtlog; \
96 continue; \
97 } \
98}
99
100#ifdef CONFIG_PM_SLEEP
101static u8 suspend_prep_ok;
102static u32 suspend_shlw_ctr_temp, suspend_deep_ctr_temp;
103static u64 suspend_shlw_res_temp, suspend_deep_res_temp;
104#endif
105
106struct telemetry_susp_stats {
107 u32 shlw_swake_ctr;
108 u32 deep_swake_ctr;
109 u64 shlw_swake_res;
110 u64 deep_swake_res;
111 u32 shlw_ctr;
112 u32 deep_ctr;
113 u64 shlw_res;
114 u64 deep_res;
115};
116
117/* Bitmap definitions for default counters in APL */
118struct telem_pss_idle_stateinfo {
119 const char *name;
120 u32 bit_pos;
121};
122
123static struct telem_pss_idle_stateinfo telem_apl_pss_idle_data[] = {
124 {"IA_CORE0_C1E", 0},
125 {"IA_CORE1_C1E", 1},
126 {"IA_CORE2_C1E", 2},
127 {"IA_CORE3_C1E", 3},
128 {"IA_CORE0_C6", 16},
129 {"IA_CORE1_C6", 17},
130 {"IA_CORE2_C6", 18},
131 {"IA_CORE3_C6", 19},
132 {"IA_MODULE0_C7", 32},
133 {"IA_MODULE1_C7", 33},
134 {"GT_RC6", 40},
135 {"IUNIT_PROCESSING_IDLE", 41},
136 {"FAR_MEM_IDLE", 43},
137 {"DISPLAY_IDLE", 44},
138 {"IUNIT_INPUT_SYSTEM_IDLE", 45},
139 {"PCS_STATUS", 60},
140};
141
142struct telem_pcs_blkd_info {
143 const char *name;
144 u32 bit_pos;
145};
146
147static struct telem_pcs_blkd_info telem_apl_pcs_idle_blkd_data[] = {
148 {"COMPUTE", 0},
149 {"MISC", 8},
150 {"MODULE_ACTIONS_PENDING", 16},
151 {"LTR", 24},
152 {"DISPLAY_WAKE", 32},
153 {"ISP_WAKE", 40},
154 {"PSF0_ACTIVE", 48},
155};
156
157static struct telem_pcs_blkd_info telem_apl_pcs_s0ix_blkd_data[] = {
158 {"LTR", 0},
159 {"IRTL", 8},
160 {"WAKE_DEADLINE_PENDING", 16},
161 {"DISPLAY", 24},
162 {"ISP", 32},
163 {"CORE", 40},
164 {"PMC", 48},
165 {"MISC", 56},
166};
167
168struct telem_pss_ltr_info {
169 const char *name;
170 u32 bit_pos;
171};
172
173static struct telem_pss_ltr_info telem_apl_pss_ltr_data[] = {
174 {"CORE_ACTIVE", 0},
175 {"MEM_UP", 8},
176 {"DFX", 16},
177 {"DFX_FORCE_LTR", 24},
178 {"DISPLAY", 32},
179 {"ISP", 40},
180 {"SOUTH", 48},
181};
182
183struct telem_pss_wakeup_info {
184 const char *name;
185 u32 bit_pos;
186};
187
188static struct telem_pss_wakeup_info telem_apl_pss_wakeup[] = {
189 {"IP_IDLE", 0},
190 {"DISPLAY_WAKE", 8},
191 {"VOLTAGE_REG_INT", 16},
192 {"DROWSY_TIMER (HOTPLUG)", 24},
193 {"CORE_WAKE", 32},
194 {"MISC_S0IX", 40},
195 {"MISC_ABORT", 56},
196};
197
198struct telem_ioss_d0ix_stateinfo {
199 const char *name;
200 u32 bit_pos;
201};
202
203static struct telem_ioss_d0ix_stateinfo telem_apl_ioss_d0ix_data[] = {
204 {"CSE", 0},
205 {"SCC2", 1},
206 {"GMM", 2},
207 {"XDCI", 3},
208 {"XHCI", 4},
209 {"ISH", 5},
210 {"AVS", 6},
211 {"PCIE0P1", 7},
212 {"PECI0P0", 8},
213 {"LPSS", 9},
214 {"SCC", 10},
215 {"PWM", 11},
216 {"PCIE1_P3", 12},
217 {"PCIE1_P2", 13},
218 {"PCIE1_P1", 14},
219 {"PCIE1_P0", 15},
220 {"CNV", 16},
221 {"SATA", 17},
222 {"PRTC", 18},
223};
224
225struct telem_ioss_pg_info {
226 const char *name;
227 u32 bit_pos;
228};
229
230static struct telem_ioss_pg_info telem_apl_ioss_pg_data[] = {
231 {"LPSS", 0},
232 {"SCC", 1},
233 {"P2SB", 2},
234 {"SCC2", 3},
235 {"GMM", 4},
236 {"PCIE0", 5},
237 {"XDCI", 6},
238 {"xHCI", 7},
239 {"CSE", 8},
240 {"SPI", 9},
241 {"AVSPGD4", 10},
242 {"AVSPGD3", 11},
243 {"AVSPGD2", 12},
244 {"AVSPGD1", 13},
245 {"ISH", 14},
246 {"EXI", 15},
247 {"NPKVRC", 16},
248 {"NPKVNN", 17},
249 {"CUNIT", 18},
250 {"FUSE_CTRL", 19},
251 {"PCIE1", 20},
252 {"CNV", 21},
253 {"LPC", 22},
254 {"SATA", 23},
255 {"SMB", 24},
256 {"PRTC", 25},
257};
258
259
260struct telemetry_debugfs_conf {
261 struct telemetry_susp_stats suspend_stats;
262 struct dentry *telemetry_dbg_dir;
263
264 /* Bitmap Data */
265 struct telem_ioss_d0ix_stateinfo *ioss_d0ix_data;
266 struct telem_pss_idle_stateinfo *pss_idle_data;
267 struct telem_pcs_blkd_info *pcs_idle_blkd_data;
268 struct telem_pcs_blkd_info *pcs_s0ix_blkd_data;
269 struct telem_pss_wakeup_info *pss_wakeup;
270 struct telem_pss_ltr_info *pss_ltr_data;
271 struct telem_ioss_pg_info *ioss_pg_data;
272 u8 pcs_idle_blkd_evts;
273 u8 pcs_s0ix_blkd_evts;
274 u8 pss_wakeup_evts;
275 u8 pss_idle_evts;
276 u8 pss_ltr_evts;
277 u8 ioss_d0ix_evts;
278 u8 ioss_pg_evts;
279
280 /* IDs */
281 u16 pss_ltr_blocking_id;
282 u16 pcs_idle_blkd_id;
283 u16 pcs_s0ix_blkd_id;
284 u16 s0ix_total_occ_id;
285 u16 s0ix_shlw_occ_id;
286 u16 s0ix_deep_occ_id;
287 u16 s0ix_total_res_id;
288 u16 s0ix_shlw_res_id;
289 u16 s0ix_deep_res_id;
290 u16 pss_wakeup_id;
291 u16 ioss_d0ix_id;
292 u16 pstates_id;
293 u16 pss_idle_id;
294 u16 ioss_d3_id;
295 u16 ioss_pg_id;
296};
297
298static struct telemetry_debugfs_conf *debugfs_conf;
299
300static struct telemetry_debugfs_conf telem_apl_debugfs_conf = {
301 .pss_idle_data = telem_apl_pss_idle_data,
302 .pcs_idle_blkd_data = telem_apl_pcs_idle_blkd_data,
303 .pcs_s0ix_blkd_data = telem_apl_pcs_s0ix_blkd_data,
304 .pss_ltr_data = telem_apl_pss_ltr_data,
305 .pss_wakeup = telem_apl_pss_wakeup,
306 .ioss_d0ix_data = telem_apl_ioss_d0ix_data,
307 .ioss_pg_data = telem_apl_ioss_pg_data,
308
309 .pss_idle_evts = TELEM_EVT_LEN(telem_apl_pss_idle_data),
310 .pcs_idle_blkd_evts = TELEM_EVT_LEN(telem_apl_pcs_idle_blkd_data),
311 .pcs_s0ix_blkd_evts = TELEM_EVT_LEN(telem_apl_pcs_s0ix_blkd_data),
312 .pss_ltr_evts = TELEM_EVT_LEN(telem_apl_pss_ltr_data),
313 .pss_wakeup_evts = TELEM_EVT_LEN(telem_apl_pss_wakeup),
314 .ioss_d0ix_evts = TELEM_EVT_LEN(telem_apl_ioss_d0ix_data),
315 .ioss_pg_evts = TELEM_EVT_LEN(telem_apl_ioss_pg_data),
316
317 .pstates_id = TELEM_APL_PSS_PSTATES_ID,
318 .pss_idle_id = TELEM_APL_PSS_IDLE_ID,
319 .pcs_idle_blkd_id = TELEM_APL_PCS_IDLE_BLOCKED_ID,
320 .pcs_s0ix_blkd_id = TELEM_APL_PCS_S0IX_BLOCKED_ID,
321 .pss_wakeup_id = TELEM_APL_PSS_WAKEUP_ID,
322 .pss_ltr_blocking_id = TELEM_APL_PSS_LTR_BLOCKING_ID,
323 .s0ix_total_occ_id = TELEM_APL_S0IX_TOTAL_OCC_ID,
324 .s0ix_shlw_occ_id = TELEM_APL_S0IX_SHLW_OCC_ID,
325 .s0ix_deep_occ_id = TELEM_APL_S0IX_DEEP_OCC_ID,
326 .s0ix_total_res_id = TELEM_APL_S0IX_TOTAL_RES_ID,
327 .s0ix_shlw_res_id = TELEM_APL_S0IX_SHLW_RES_ID,
328 .s0ix_deep_res_id = TELEM_APL_S0IX_DEEP_RES_ID,
329 .ioss_d0ix_id = TELEM_APL_D0IX_ID,
330 .ioss_d3_id = TELEM_APL_D3_ID,
331 .ioss_pg_id = TELEM_APL_PG_ID,
332};
333
334static const struct x86_cpu_id telemetry_debugfs_cpu_ids[] = {
335 TELEM_DEBUGFS_CPU(INTEL_FAM6_ATOM_GOLDMONT, telem_apl_debugfs_conf),
336 {}
337};
338
339MODULE_DEVICE_TABLE(x86cpu, telemetry_debugfs_cpu_ids);
340
341static int telemetry_debugfs_check_evts(void)
342{
343 if ((debugfs_conf->pss_idle_evts > TELEM_PSS_IDLE_EVTS) ||
344 (debugfs_conf->pcs_idle_blkd_evts > TELEM_PSS_IDLE_BLOCKED_EVTS) ||
345 (debugfs_conf->pcs_s0ix_blkd_evts > TELEM_PSS_S0IX_BLOCKED_EVTS) ||
346 (debugfs_conf->pss_ltr_evts > TELEM_PSS_LTR_BLOCKING_EVTS) ||
347 (debugfs_conf->pss_wakeup_evts > TELEM_PSS_S0IX_WAKEUP_EVTS) ||
348 (debugfs_conf->ioss_d0ix_evts > TELEM_IOSS_DX_D0IX_EVTS) ||
349 (debugfs_conf->ioss_pg_evts > TELEM_IOSS_PG_EVTS))
350 return -EINVAL;
351
352 return 0;
353}
354
355static int telem_pss_states_show(struct seq_file *s, void *unused)
356{
357 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
358 struct telemetry_debugfs_conf *conf = debugfs_conf;
359 const char *name[TELEM_MAX_OS_ALLOCATED_EVENTS];
360 u32 pcs_idle_blkd[TELEM_PSS_IDLE_BLOCKED_EVTS],
361 pcs_s0ix_blkd[TELEM_PSS_S0IX_BLOCKED_EVTS],
362 pss_s0ix_wakeup[TELEM_PSS_S0IX_WAKEUP_EVTS],
363 pss_ltr_blkd[TELEM_PSS_LTR_BLOCKING_EVTS],
364 pss_idle[TELEM_PSS_IDLE_EVTS];
365 int index, idx, ret, err = 0;
366 u64 pstates = 0;
367
368 ret = telemetry_read_eventlog(TELEM_PSS, evtlog,
369 TELEM_MAX_OS_ALLOCATED_EVENTS);
370 if (ret < 0)
371 return ret;
372
373 err = telemetry_get_evtname(TELEM_PSS, name,
374 TELEM_MAX_OS_ALLOCATED_EVENTS);
375 if (err < 0)
376 return err;
377
378 seq_puts(s, "\n----------------------------------------------------\n");
379 seq_puts(s, "\tPSS TELEM EVENTLOG (Residency = field/19.2 us\n");
380 seq_puts(s, "----------------------------------------------------\n");
381 for (index = 0; index < ret; index++) {
382 seq_printf(s, "%-32s %llu\n",
383 name[index], evtlog[index].telem_evtlog);
384
385 /* Fetch PSS IDLE State */
386 if (evtlog[index].telem_evtid == conf->pss_idle_id) {
387 pss_idle[conf->pss_idle_evts - 1] =
388 (evtlog[index].telem_evtlog >>
389 conf->pss_idle_data[conf->pss_idle_evts - 1].bit_pos) &
390 TELEM_APL_MASK_PCS_STATE;
391 }
392
393
394 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_idle_id,
395 conf->pss_idle_evts - 1,
396 pss_idle, evtlog[index].telem_evtlog,
397 conf->pss_idle_data, TELEM_MASK_BIT);
398
399 TELEM_CHECK_AND_PARSE_EVTS(conf->pcs_idle_blkd_id,
400 conf->pcs_idle_blkd_evts,
401 pcs_idle_blkd,
402 evtlog[index].telem_evtlog,
403 conf->pcs_idle_blkd_data,
404 TELEM_MASK_BYTE);
405
406 TELEM_CHECK_AND_PARSE_EVTS(conf->pcs_s0ix_blkd_id,
407 conf->pcs_s0ix_blkd_evts,
408 pcs_s0ix_blkd,
409 evtlog[index].telem_evtlog,
410 conf->pcs_s0ix_blkd_data,
411 TELEM_MASK_BYTE);
412
413
414 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_wakeup_id,
415 conf->pss_wakeup_evts,
416 pss_s0ix_wakeup,
417 evtlog[index].telem_evtlog,
418 conf->pss_wakeup, TELEM_MASK_BYTE);
419
420 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_ltr_blocking_id,
421 conf->pss_ltr_evts, pss_ltr_blkd,
422 evtlog[index].telem_evtlog,
423 conf->pss_ltr_data, TELEM_MASK_BYTE);
424
425 if (evtlog[index].telem_evtid == debugfs_conf->pstates_id)
426 pstates = evtlog[index].telem_evtlog;
427 }
428
429 seq_puts(s, "\n--------------------------------------\n");
430 seq_puts(s, "PStates\n");
431 seq_puts(s, "--------------------------------------\n");
432 seq_puts(s, "Domain\t\t\t\tFreq(Mhz)\n");
433 seq_printf(s, " IA\t\t\t\t %llu\n GT\t\t\t\t %llu\n",
434 (pstates & TELEM_MASK_BYTE)*100,
435 ((pstates >> 8) & TELEM_MASK_BYTE)*50/3);
436
437 seq_printf(s, " IUNIT\t\t\t\t %llu\n SA\t\t\t\t %llu\n",
438 ((pstates >> 16) & TELEM_MASK_BYTE)*25,
439 ((pstates >> 24) & TELEM_MASK_BYTE)*50/3);
440
441 seq_puts(s, "\n--------------------------------------\n");
442 seq_puts(s, "PSS IDLE Status\n");
443 seq_puts(s, "--------------------------------------\n");
444 seq_puts(s, "Device\t\t\t\t\tIDLE\n");
445 for (index = 0; index < debugfs_conf->pss_idle_evts; index++) {
446 seq_printf(s, "%-32s\t%u\n",
447 debugfs_conf->pss_idle_data[index].name,
448 pss_idle[index]);
449 }
450
451 seq_puts(s, "\n--------------------------------------\n");
452 seq_puts(s, "PSS Idle blkd Status (~1ms saturating bucket)\n");
453 seq_puts(s, "--------------------------------------\n");
454 seq_puts(s, "Blocker\t\t\t\t\tCount\n");
455 for (index = 0; index < debugfs_conf->pcs_idle_blkd_evts; index++) {
456 seq_printf(s, "%-32s\t%u\n",
457 debugfs_conf->pcs_idle_blkd_data[index].name,
458 pcs_idle_blkd[index]);
459 }
460
461 seq_puts(s, "\n--------------------------------------\n");
462 seq_puts(s, "PSS S0ix blkd Status (~1ms saturating bucket)\n");
463 seq_puts(s, "--------------------------------------\n");
464 seq_puts(s, "Blocker\t\t\t\t\tCount\n");
465 for (index = 0; index < debugfs_conf->pcs_s0ix_blkd_evts; index++) {
466 seq_printf(s, "%-32s\t%u\n",
467 debugfs_conf->pcs_s0ix_blkd_data[index].name,
468 pcs_s0ix_blkd[index]);
469 }
470
471 seq_puts(s, "\n--------------------------------------\n");
472 seq_puts(s, "LTR Blocking Status (~1ms saturating bucket)\n");
473 seq_puts(s, "--------------------------------------\n");
474 seq_puts(s, "Blocker\t\t\t\t\tCount\n");
475 for (index = 0; index < debugfs_conf->pss_ltr_evts; index++) {
476 seq_printf(s, "%-32s\t%u\n",
477 debugfs_conf->pss_ltr_data[index].name,
478 pss_s0ix_wakeup[index]);
479 }
480
481 seq_puts(s, "\n--------------------------------------\n");
482 seq_puts(s, "Wakes Status (~1ms saturating bucket)\n");
483 seq_puts(s, "--------------------------------------\n");
484 seq_puts(s, "Wakes\t\t\t\t\tCount\n");
485 for (index = 0; index < debugfs_conf->pss_wakeup_evts; index++) {
486 seq_printf(s, "%-32s\t%u\n",
487 debugfs_conf->pss_wakeup[index].name,
488 pss_ltr_blkd[index]);
489 }
490
491 return 0;
492}
493
494static int telem_pss_state_open(struct inode *inode, struct file *file)
495{
496 return single_open(file, telem_pss_states_show, inode->i_private);
497}
498
499static const struct file_operations telem_pss_ops = {
500 .open = telem_pss_state_open,
501 .read = seq_read,
502 .llseek = seq_lseek,
503 .release = single_release,
504};
505
506
507static int telem_ioss_states_show(struct seq_file *s, void *unused)
508{
509 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
510 const char *name[TELEM_MAX_OS_ALLOCATED_EVENTS];
511 int index, ret, err;
512
513 ret = telemetry_read_eventlog(TELEM_IOSS, evtlog,
514 TELEM_MAX_OS_ALLOCATED_EVENTS);
515 if (ret < 0)
516 return ret;
517
518 err = telemetry_get_evtname(TELEM_IOSS, name,
519 TELEM_MAX_OS_ALLOCATED_EVENTS);
520 if (err < 0)
521 return err;
522
523 seq_puts(s, "--------------------------------------\n");
524 seq_puts(s, "\tI0SS TELEMETRY EVENTLOG\n");
525 seq_puts(s, "--------------------------------------\n");
526 for (index = 0; index < ret; index++) {
527 seq_printf(s, "%-32s 0x%llx\n",
528 name[index], evtlog[index].telem_evtlog);
529 }
530
531 return 0;
532}
533
534static int telem_ioss_state_open(struct inode *inode, struct file *file)
535{
536 return single_open(file, telem_ioss_states_show, inode->i_private);
537}
538
539static const struct file_operations telem_ioss_ops = {
540 .open = telem_ioss_state_open,
541 .read = seq_read,
542 .llseek = seq_lseek,
543 .release = single_release,
544};
545
546static int telem_soc_states_show(struct seq_file *s, void *unused)
547{
548 u32 d3_sts[TELEM_IOSS_DX_D0IX_EVTS], d0ix_sts[TELEM_IOSS_DX_D0IX_EVTS];
549 u32 pg_sts[TELEM_IOSS_PG_EVTS], pss_idle[TELEM_PSS_IDLE_EVTS];
550 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
551 u32 s0ix_total_ctr = 0, s0ix_shlw_ctr = 0, s0ix_deep_ctr = 0;
552 u64 s0ix_total_res = 0, s0ix_shlw_res = 0, s0ix_deep_res = 0;
553 struct telemetry_debugfs_conf *conf = debugfs_conf;
554 struct pci_dev *dev = NULL;
555 int index, idx, ret;
556 u32 d3_state;
557 u16 pmcsr;
558
559 ret = telemetry_read_eventlog(TELEM_IOSS, evtlog,
560 TELEM_MAX_OS_ALLOCATED_EVENTS);
561 if (ret < 0)
562 return ret;
563
564 for (index = 0; index < ret; index++) {
565 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_d3_id,
566 conf->ioss_d0ix_evts,
567 d3_sts, evtlog[index].telem_evtlog,
568 conf->ioss_d0ix_data,
569 TELEM_MASK_BIT);
570
571 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_pg_id, conf->ioss_pg_evts,
572 pg_sts, evtlog[index].telem_evtlog,
573 conf->ioss_pg_data, TELEM_MASK_BIT);
574
575 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_d0ix_id,
576 conf->ioss_d0ix_evts,
577 d0ix_sts, evtlog[index].telem_evtlog,
578 conf->ioss_d0ix_data,
579 TELEM_MASK_BIT);
580
581 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_total_occ_id,
582 s0ix_total_ctr);
583
584 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
585 s0ix_shlw_ctr);
586
587 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
588 s0ix_deep_ctr);
589
590 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_total_res_id,
591 s0ix_total_res);
592
593 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
594 s0ix_shlw_res);
595
596 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
597 s0ix_deep_res);
598 }
599
600 seq_puts(s, "\n---------------------------------------------------\n");
601 seq_puts(s, "S0IX Type\t\t\t Occurrence\t\t Residency(us)\n");
602 seq_puts(s, "---------------------------------------------------\n");
603
604 seq_printf(s, "S0IX Shallow\t\t\t %10u\t %10llu\n",
605 s0ix_shlw_ctr -
606 conf->suspend_stats.shlw_ctr -
607 conf->suspend_stats.shlw_swake_ctr,
608 (u64)((s0ix_shlw_res -
609 conf->suspend_stats.shlw_res -
610 conf->suspend_stats.shlw_swake_res)*10/192));
611
612 seq_printf(s, "S0IX Deep\t\t\t %10u\t %10llu\n",
613 s0ix_deep_ctr -
614 conf->suspend_stats.deep_ctr -
615 conf->suspend_stats.deep_swake_ctr,
616 (u64)((s0ix_deep_res -
617 conf->suspend_stats.deep_res -
618 conf->suspend_stats.deep_swake_res)*10/192));
619
620 seq_printf(s, "Suspend(With S0ixShallow)\t %10u\t %10llu\n",
621 conf->suspend_stats.shlw_ctr,
622 (u64)(conf->suspend_stats.shlw_res*10)/192);
623
624 seq_printf(s, "Suspend(With S0ixDeep)\t\t %10u\t %10llu\n",
625 conf->suspend_stats.deep_ctr,
626 (u64)(conf->suspend_stats.deep_res*10)/192);
627
628 seq_printf(s, "Suspend(With Shallow-Wakes)\t %10u\t %10llu\n",
629 conf->suspend_stats.shlw_swake_ctr +
630 conf->suspend_stats.deep_swake_ctr,
631 (u64)((conf->suspend_stats.shlw_swake_res +
632 conf->suspend_stats.deep_swake_res)*10/192));
633
634 seq_printf(s, "S0IX+Suspend Total\t\t %10u\t %10llu\n", s0ix_total_ctr,
635 (u64)(s0ix_total_res*10/192));
636 seq_puts(s, "\n-------------------------------------------------\n");
637 seq_puts(s, "\t\tDEVICE STATES\n");
638 seq_puts(s, "-------------------------------------------------\n");
639
640 for_each_pci_dev(dev) {
641 pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr);
642 d3_state = ((pmcsr & PCI_PM_CTRL_STATE_MASK) ==
643 (__force int)PCI_D3hot) ? 1 : 0;
644
645 seq_printf(s, "pci %04x %04X %s %20.20s: ",
646 dev->vendor, dev->device, dev_name(&dev->dev),
647 dev_driver_string(&dev->dev));
648 seq_printf(s, " d3:%x\n", d3_state);
649 }
650
651 seq_puts(s, "\n--------------------------------------\n");
652 seq_puts(s, "D3/D0i3 Status\n");
653 seq_puts(s, "--------------------------------------\n");
654 seq_puts(s, "Block\t\t D3\t D0i3\n");
655 for (index = 0; index < conf->ioss_d0ix_evts; index++) {
656 seq_printf(s, "%-10s\t %u\t %u\n",
657 conf->ioss_d0ix_data[index].name,
658 d3_sts[index], d0ix_sts[index]);
659 }
660
661 seq_puts(s, "\n--------------------------------------\n");
662 seq_puts(s, "South Complex PowerGate Status\n");
663 seq_puts(s, "--------------------------------------\n");
664 seq_puts(s, "Device\t\t PG\n");
665 for (index = 0; index < conf->ioss_pg_evts; index++) {
666 seq_printf(s, "%-10s\t %u\n",
667 conf->ioss_pg_data[index].name,
668 pg_sts[index]);
669 }
670
671 evtlog->telem_evtid = conf->pss_idle_id;
672 ret = telemetry_read_events(TELEM_PSS, evtlog, 1);
673 if (ret < 0)
674 return ret;
675
676 seq_puts(s, "\n-----------------------------------------\n");
677 seq_puts(s, "North Idle Status\n");
678 seq_puts(s, "-----------------------------------------\n");
679 for (idx = 0; idx < conf->pss_idle_evts - 1; idx++) {
680 pss_idle[idx] = (evtlog->telem_evtlog >>
681 conf->pss_idle_data[idx].bit_pos) &
682 TELEM_MASK_BIT;
683 }
684
685 pss_idle[idx] = (evtlog->telem_evtlog >>
686 conf->pss_idle_data[idx].bit_pos) &
687 TELEM_APL_MASK_PCS_STATE;
688
689 for (index = 0; index < conf->pss_idle_evts; index++) {
690 seq_printf(s, "%-30s %u\n",
691 conf->pss_idle_data[index].name,
692 pss_idle[index]);
693 }
694
695 seq_puts(s, "\nPCS_STATUS Code\n");
696 seq_puts(s, "0:C0 1:C1 2:C1_DN_WT_DEV 3:C2 4:C2_WT_DE_MEM_UP\n");
697 seq_puts(s, "5:C2_WT_DE_MEM_DOWN 6:C2_UP_WT_DEV 7:C2_DN 8:C2_VOA\n");
698 seq_puts(s, "9:C2_VOA_UP 10:S0IX_PRE 11:S0IX\n");
699
700 return 0;
701}
702
703static int telem_soc_state_open(struct inode *inode, struct file *file)
704{
705 return single_open(file, telem_soc_states_show, inode->i_private);
706}
707
708static const struct file_operations telem_socstate_ops = {
709 .open = telem_soc_state_open,
710 .read = seq_read,
711 .llseek = seq_lseek,
712 .release = single_release,
713};
714
715static int telem_pss_trc_verb_show(struct seq_file *s, void *unused)
716{
717 u32 verbosity;
718 int err;
719
720 err = telemetry_get_trace_verbosity(TELEM_PSS, &verbosity);
721 if (err) {
722 pr_err("Get PSS Trace Verbosity Failed with Error %d\n", err);
723 return -EFAULT;
724 }
725
726 seq_printf(s, "PSS Trace Verbosity %u\n", verbosity);
727 return 0;
728}
729
730static ssize_t telem_pss_trc_verb_write(struct file *file,
731 const char __user *userbuf,
732 size_t count, loff_t *ppos)
733{
734 u32 verbosity;
735 int err;
736
737 if (kstrtou32_from_user(userbuf, count, 0, &verbosity))
738 return -EFAULT;
739
740 err = telemetry_set_trace_verbosity(TELEM_PSS, verbosity);
741 if (err) {
742 pr_err("Changing PSS Trace Verbosity Failed. Error %d\n", err);
743 count = err;
744 }
745
746 return count;
747}
748
749static int telem_pss_trc_verb_open(struct inode *inode, struct file *file)
750{
751 return single_open(file, telem_pss_trc_verb_show, inode->i_private);
752}
753
754static const struct file_operations telem_pss_trc_verb_ops = {
755 .open = telem_pss_trc_verb_open,
756 .read = seq_read,
757 .write = telem_pss_trc_verb_write,
758 .llseek = seq_lseek,
759 .release = single_release,
760};
761
762
763static int telem_ioss_trc_verb_show(struct seq_file *s, void *unused)
764{
765 u32 verbosity;
766 int err;
767
768 err = telemetry_get_trace_verbosity(TELEM_IOSS, &verbosity);
769 if (err) {
770 pr_err("Get IOSS Trace Verbosity Failed with Error %d\n", err);
771 return -EFAULT;
772 }
773
774 seq_printf(s, "IOSS Trace Verbosity %u\n", verbosity);
775 return 0;
776}
777
778static ssize_t telem_ioss_trc_verb_write(struct file *file,
779 const char __user *userbuf,
780 size_t count, loff_t *ppos)
781{
782 u32 verbosity;
783 int err;
784
785 if (kstrtou32_from_user(userbuf, count, 0, &verbosity))
786 return -EFAULT;
787
788 err = telemetry_set_trace_verbosity(TELEM_IOSS, verbosity);
789 if (err) {
790 pr_err("Changing IOSS Trace Verbosity Failed. Error %d\n", err);
791 count = err;
792 }
793
794 return count;
795}
796
797static int telem_ioss_trc_verb_open(struct inode *inode, struct file *file)
798{
799 return single_open(file, telem_ioss_trc_verb_show, inode->i_private);
800}
801
802static const struct file_operations telem_ioss_trc_verb_ops = {
803 .open = telem_ioss_trc_verb_open,
804 .read = seq_read,
805 .write = telem_ioss_trc_verb_write,
806 .llseek = seq_lseek,
807 .release = single_release,
808};
809
810#ifdef CONFIG_PM_SLEEP
811static int pm_suspend_prep_cb(void)
812{
813 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
814 struct telemetry_debugfs_conf *conf = debugfs_conf;
815 int ret, index;
816
817 ret = telemetry_raw_read_eventlog(TELEM_IOSS, evtlog,
818 TELEM_MAX_OS_ALLOCATED_EVENTS);
819 if (ret < 0) {
820 suspend_prep_ok = 0;
821 goto out;
822 }
823
824 for (index = 0; index < ret; index++) {
825
826 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
827 suspend_shlw_ctr_temp);
828
829 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
830 suspend_deep_ctr_temp);
831
832 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
833 suspend_shlw_res_temp);
834
835 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
836 suspend_deep_res_temp);
837 }
838 suspend_prep_ok = 1;
839out:
840 return NOTIFY_OK;
841}
842
843static int pm_suspend_exit_cb(void)
844{
845 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
846 static u32 suspend_shlw_ctr_exit, suspend_deep_ctr_exit;
847 static u64 suspend_shlw_res_exit, suspend_deep_res_exit;
848 struct telemetry_debugfs_conf *conf = debugfs_conf;
849 int ret, index;
850
851 if (!suspend_prep_ok)
852 goto out;
853
854 ret = telemetry_raw_read_eventlog(TELEM_IOSS, evtlog,
855 TELEM_MAX_OS_ALLOCATED_EVENTS);
856 if (ret < 0)
857 goto out;
858
859 for (index = 0; index < ret; index++) {
860 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
861 suspend_shlw_ctr_exit);
862
863 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
864 suspend_deep_ctr_exit);
865
866 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
867 suspend_shlw_res_exit);
868
869 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
870 suspend_deep_res_exit);
871 }
872
873 if ((suspend_shlw_ctr_exit < suspend_shlw_ctr_temp) ||
874 (suspend_deep_ctr_exit < suspend_deep_ctr_temp) ||
875 (suspend_shlw_res_exit < suspend_shlw_res_temp) ||
876 (suspend_deep_res_exit < suspend_deep_res_temp)) {
877 pr_err("Wrong s0ix counters detected\n");
878 goto out;
879 }
880
881 suspend_shlw_ctr_exit -= suspend_shlw_ctr_temp;
882 suspend_deep_ctr_exit -= suspend_deep_ctr_temp;
883 suspend_shlw_res_exit -= suspend_shlw_res_temp;
884 suspend_deep_res_exit -= suspend_deep_res_temp;
885
886 if (suspend_shlw_ctr_exit == 1) {
887 conf->suspend_stats.shlw_ctr +=
888 suspend_shlw_ctr_exit;
889
890 conf->suspend_stats.shlw_res +=
891 suspend_shlw_res_exit;
892 }
893 /* Shallow Wakes Case */
894 else if (suspend_shlw_ctr_exit > 1) {
895 conf->suspend_stats.shlw_swake_ctr +=
896 suspend_shlw_ctr_exit;
897
898 conf->suspend_stats.shlw_swake_res +=
899 suspend_shlw_res_exit;
900 }
901
902 if (suspend_deep_ctr_exit == 1) {
903 conf->suspend_stats.deep_ctr +=
904 suspend_deep_ctr_exit;
905
906 conf->suspend_stats.deep_res +=
907 suspend_deep_res_exit;
908 }
909
910 /* Shallow Wakes Case */
911 else if (suspend_deep_ctr_exit > 1) {
912 conf->suspend_stats.deep_swake_ctr +=
913 suspend_deep_ctr_exit;
914
915 conf->suspend_stats.deep_swake_res +=
916 suspend_deep_res_exit;
917 }
918
919out:
920 suspend_prep_ok = 0;
921 return NOTIFY_OK;
922}
923
924static int pm_notification(struct notifier_block *this,
925 unsigned long event, void *ptr)
926{
927 switch (event) {
928 case PM_SUSPEND_PREPARE:
929 return pm_suspend_prep_cb();
930 case PM_POST_SUSPEND:
931 return pm_suspend_exit_cb();
932 }
933
934 return NOTIFY_DONE;
935}
936
937static struct notifier_block pm_notifier = {
938 .notifier_call = pm_notification,
939};
940#endif /* CONFIG_PM_SLEEP */
941
942static int __init telemetry_debugfs_init(void)
943{
944 const struct x86_cpu_id *id;
945 int err = -ENOMEM;
946 struct dentry *f;
947
948 /* Only APL supported for now */
949 id = x86_match_cpu(telemetry_debugfs_cpu_ids);
950 if (!id)
951 return -ENODEV;
952
953 debugfs_conf = (struct telemetry_debugfs_conf *)id->driver_data;
954
955 err = telemetry_pltconfig_valid();
956 if (err < 0)
957 return -ENODEV;
958
959 err = telemetry_debugfs_check_evts();
960 if (err < 0)
961 return -EINVAL;
962
963
964#ifdef CONFIG_PM_SLEEP
965 register_pm_notifier(&pm_notifier);
966#endif /* CONFIG_PM_SLEEP */
967
968 debugfs_conf->telemetry_dbg_dir = debugfs_create_dir("telemetry", NULL);
969 if (!debugfs_conf->telemetry_dbg_dir)
970 return -ENOMEM;
971
972 f = debugfs_create_file("pss_info", S_IFREG | S_IRUGO,
973 debugfs_conf->telemetry_dbg_dir, NULL,
974 &telem_pss_ops);
975 if (!f) {
976 pr_err("pss_sample_info debugfs register failed\n");
977 goto out;
978 }
979
980 f = debugfs_create_file("ioss_info", S_IFREG | S_IRUGO,
981 debugfs_conf->telemetry_dbg_dir, NULL,
982 &telem_ioss_ops);
983 if (!f) {
984 pr_err("ioss_sample_info debugfs register failed\n");
985 goto out;
986 }
987
988 f = debugfs_create_file("soc_states", S_IFREG | S_IRUGO,
989 debugfs_conf->telemetry_dbg_dir,
990 NULL, &telem_socstate_ops);
991 if (!f) {
992 pr_err("ioss_sample_info debugfs register failed\n");
993 goto out;
994 }
995
996 f = debugfs_create_file("pss_trace_verbosity", S_IFREG | S_IRUGO,
997 debugfs_conf->telemetry_dbg_dir, NULL,
998 &telem_pss_trc_verb_ops);
999 if (!f) {
1000 pr_err("pss_trace_verbosity debugfs register failed\n");
1001 goto out;
1002 }
1003
1004 f = debugfs_create_file("ioss_trace_verbosity", S_IFREG | S_IRUGO,
1005 debugfs_conf->telemetry_dbg_dir, NULL,
1006 &telem_ioss_trc_verb_ops);
1007 if (!f) {
1008 pr_err("ioss_trace_verbosity debugfs register failed\n");
1009 goto out;
1010 }
1011
1012 return 0;
1013
1014out:
1015 debugfs_remove_recursive(debugfs_conf->telemetry_dbg_dir);
1016 debugfs_conf->telemetry_dbg_dir = NULL;
1017
1018 return err;
1019}
1020
1021static void __exit telemetry_debugfs_exit(void)
1022{
1023 debugfs_remove_recursive(debugfs_conf->telemetry_dbg_dir);
1024 debugfs_conf->telemetry_dbg_dir = NULL;
1025}
1026
1027late_initcall(telemetry_debugfs_init);
1028module_exit(telemetry_debugfs_exit);
1029
1030MODULE_AUTHOR("Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>");
1031MODULE_DESCRIPTION("Intel SoC Telemetry debugfs Interface");
1032MODULE_VERSION(DRIVER_VERSION);
1033MODULE_LICENSE("GPL");