Linux kernel mirror (for testing)
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linux
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Intel SOC Telemetry debugfs Driver: Currently supports APL
4 * Copyright (c) 2015, Intel Corporation.
5 * All Rights Reserved.
6 *
7 * This file provides the debugfs interfaces for telemetry.
8 * /sys/kernel/debug/telemetry/pss_info: Shows Primary Control Sub-Sys Counters
9 * /sys/kernel/debug/telemetry/ioss_info: Shows IO Sub-System Counters
10 * /sys/kernel/debug/telemetry/soc_states: Shows SoC State
11 * /sys/kernel/debug/telemetry/pss_trace_verbosity: Read and Change Tracing
12 * Verbosity via firmware
13 * /sys/kernel/debug/telemetry/ioss_race_verbosity: Write and Change Tracing
14 * Verbosity via firmware
15 */
16#include <linux/debugfs.h>
17#include <linux/device.h>
18#include <linux/module.h>
19#include <linux/pci.h>
20#include <linux/seq_file.h>
21#include <linux/suspend.h>
22
23#include <asm/cpu_device_id.h>
24#include <asm/intel-family.h>
25#include <asm/intel_pmc_ipc.h>
26#include <asm/intel_telemetry.h>
27
28#define DRIVER_NAME "telemetry_soc_debugfs"
29#define DRIVER_VERSION "1.0.0"
30
31/* ApolloLake SoC Event-IDs */
32#define TELEM_APL_PSS_PSTATES_ID 0x2802
33#define TELEM_APL_PSS_IDLE_ID 0x2806
34#define TELEM_APL_PCS_IDLE_BLOCKED_ID 0x2C00
35#define TELEM_APL_PCS_S0IX_BLOCKED_ID 0x2C01
36#define TELEM_APL_PSS_WAKEUP_ID 0x2C02
37#define TELEM_APL_PSS_LTR_BLOCKING_ID 0x2C03
38
39#define TELEM_APL_S0IX_TOTAL_OCC_ID 0x4000
40#define TELEM_APL_S0IX_SHLW_OCC_ID 0x4001
41#define TELEM_APL_S0IX_DEEP_OCC_ID 0x4002
42#define TELEM_APL_S0IX_TOTAL_RES_ID 0x4800
43#define TELEM_APL_S0IX_SHLW_RES_ID 0x4801
44#define TELEM_APL_S0IX_DEEP_RES_ID 0x4802
45#define TELEM_APL_D0IX_ID 0x581A
46#define TELEM_APL_D3_ID 0x5819
47#define TELEM_APL_PG_ID 0x5818
48
49#define TELEM_INFO_SRAMEVTS_MASK 0xFF00
50#define TELEM_INFO_SRAMEVTS_SHIFT 0x8
51#define TELEM_SSRAM_READ_TIMEOUT 10
52
53#define TELEM_MASK_BIT 1
54#define TELEM_MASK_BYTE 0xFF
55#define BYTES_PER_LONG 8
56#define TELEM_APL_MASK_PCS_STATE 0xF
57
58/* Max events in bitmap to check for */
59#define TELEM_PSS_IDLE_EVTS 25
60#define TELEM_PSS_IDLE_BLOCKED_EVTS 20
61#define TELEM_PSS_S0IX_BLOCKED_EVTS 20
62#define TELEM_PSS_S0IX_WAKEUP_EVTS 20
63#define TELEM_PSS_LTR_BLOCKING_EVTS 20
64#define TELEM_IOSS_DX_D0IX_EVTS 25
65#define TELEM_IOSS_PG_EVTS 30
66
67#define TELEM_CHECK_AND_PARSE_EVTS(EVTID, EVTNUM, BUF, EVTLOG, EVTDAT, MASK) { \
68 if (evtlog[index].telem_evtid == (EVTID)) { \
69 for (idx = 0; idx < (EVTNUM); idx++) \
70 (BUF)[idx] = ((EVTLOG) >> (EVTDAT)[idx].bit_pos) & \
71 (MASK); \
72 continue; \
73 } \
74}
75
76#define TELEM_CHECK_AND_PARSE_CTRS(EVTID, CTR) { \
77 if (evtlog[index].telem_evtid == (EVTID)) { \
78 (CTR) = evtlog[index].telem_evtlog; \
79 continue; \
80 } \
81}
82
83static u8 suspend_prep_ok;
84static u32 suspend_shlw_ctr_temp, suspend_deep_ctr_temp;
85static u64 suspend_shlw_res_temp, suspend_deep_res_temp;
86
87struct telemetry_susp_stats {
88 u32 shlw_ctr;
89 u32 deep_ctr;
90 u64 shlw_res;
91 u64 deep_res;
92};
93
94/* Bitmap definitions for default counters in APL */
95struct telem_pss_idle_stateinfo {
96 const char *name;
97 u32 bit_pos;
98};
99
100static struct telem_pss_idle_stateinfo telem_apl_pss_idle_data[] = {
101 {"IA_CORE0_C1E", 0},
102 {"IA_CORE1_C1E", 1},
103 {"IA_CORE2_C1E", 2},
104 {"IA_CORE3_C1E", 3},
105 {"IA_CORE0_C6", 16},
106 {"IA_CORE1_C6", 17},
107 {"IA_CORE2_C6", 18},
108 {"IA_CORE3_C6", 19},
109 {"IA_MODULE0_C7", 32},
110 {"IA_MODULE1_C7", 33},
111 {"GT_RC6", 40},
112 {"IUNIT_PROCESSING_IDLE", 41},
113 {"FAR_MEM_IDLE", 43},
114 {"DISPLAY_IDLE", 44},
115 {"IUNIT_INPUT_SYSTEM_IDLE", 45},
116 {"PCS_STATUS", 60},
117};
118
119struct telem_pcs_blkd_info {
120 const char *name;
121 u32 bit_pos;
122};
123
124static struct telem_pcs_blkd_info telem_apl_pcs_idle_blkd_data[] = {
125 {"COMPUTE", 0},
126 {"MISC", 8},
127 {"MODULE_ACTIONS_PENDING", 16},
128 {"LTR", 24},
129 {"DISPLAY_WAKE", 32},
130 {"ISP_WAKE", 40},
131 {"PSF0_ACTIVE", 48},
132};
133
134static struct telem_pcs_blkd_info telem_apl_pcs_s0ix_blkd_data[] = {
135 {"LTR", 0},
136 {"IRTL", 8},
137 {"WAKE_DEADLINE_PENDING", 16},
138 {"DISPLAY", 24},
139 {"ISP", 32},
140 {"CORE", 40},
141 {"PMC", 48},
142 {"MISC", 56},
143};
144
145struct telem_pss_ltr_info {
146 const char *name;
147 u32 bit_pos;
148};
149
150static struct telem_pss_ltr_info telem_apl_pss_ltr_data[] = {
151 {"CORE_ACTIVE", 0},
152 {"MEM_UP", 8},
153 {"DFX", 16},
154 {"DFX_FORCE_LTR", 24},
155 {"DISPLAY", 32},
156 {"ISP", 40},
157 {"SOUTH", 48},
158};
159
160struct telem_pss_wakeup_info {
161 const char *name;
162 u32 bit_pos;
163};
164
165static struct telem_pss_wakeup_info telem_apl_pss_wakeup[] = {
166 {"IP_IDLE", 0},
167 {"DISPLAY_WAKE", 8},
168 {"VOLTAGE_REG_INT", 16},
169 {"DROWSY_TIMER (HOTPLUG)", 24},
170 {"CORE_WAKE", 32},
171 {"MISC_S0IX", 40},
172 {"MISC_ABORT", 56},
173};
174
175struct telem_ioss_d0ix_stateinfo {
176 const char *name;
177 u32 bit_pos;
178};
179
180static struct telem_ioss_d0ix_stateinfo telem_apl_ioss_d0ix_data[] = {
181 {"CSE", 0},
182 {"SCC2", 1},
183 {"GMM", 2},
184 {"XDCI", 3},
185 {"XHCI", 4},
186 {"ISH", 5},
187 {"AVS", 6},
188 {"PCIE0P1", 7},
189 {"PECI0P0", 8},
190 {"LPSS", 9},
191 {"SCC", 10},
192 {"PWM", 11},
193 {"PCIE1_P3", 12},
194 {"PCIE1_P2", 13},
195 {"PCIE1_P1", 14},
196 {"PCIE1_P0", 15},
197 {"CNV", 16},
198 {"SATA", 17},
199 {"PRTC", 18},
200};
201
202struct telem_ioss_pg_info {
203 const char *name;
204 u32 bit_pos;
205};
206
207static struct telem_ioss_pg_info telem_apl_ioss_pg_data[] = {
208 {"LPSS", 0},
209 {"SCC", 1},
210 {"P2SB", 2},
211 {"SCC2", 3},
212 {"GMM", 4},
213 {"PCIE0", 5},
214 {"XDCI", 6},
215 {"xHCI", 7},
216 {"CSE", 8},
217 {"SPI", 9},
218 {"AVSPGD4", 10},
219 {"AVSPGD3", 11},
220 {"AVSPGD2", 12},
221 {"AVSPGD1", 13},
222 {"ISH", 14},
223 {"EXI", 15},
224 {"NPKVRC", 16},
225 {"NPKVNN", 17},
226 {"CUNIT", 18},
227 {"FUSE_CTRL", 19},
228 {"PCIE1", 20},
229 {"CNV", 21},
230 {"LPC", 22},
231 {"SATA", 23},
232 {"SMB", 24},
233 {"PRTC", 25},
234};
235
236struct telemetry_debugfs_conf {
237 struct telemetry_susp_stats suspend_stats;
238 struct dentry *telemetry_dbg_dir;
239
240 /* Bitmap Data */
241 struct telem_ioss_d0ix_stateinfo *ioss_d0ix_data;
242 struct telem_pss_idle_stateinfo *pss_idle_data;
243 struct telem_pcs_blkd_info *pcs_idle_blkd_data;
244 struct telem_pcs_blkd_info *pcs_s0ix_blkd_data;
245 struct telem_pss_wakeup_info *pss_wakeup;
246 struct telem_pss_ltr_info *pss_ltr_data;
247 struct telem_ioss_pg_info *ioss_pg_data;
248 u8 pcs_idle_blkd_evts;
249 u8 pcs_s0ix_blkd_evts;
250 u8 pss_wakeup_evts;
251 u8 pss_idle_evts;
252 u8 pss_ltr_evts;
253 u8 ioss_d0ix_evts;
254 u8 ioss_pg_evts;
255
256 /* IDs */
257 u16 pss_ltr_blocking_id;
258 u16 pcs_idle_blkd_id;
259 u16 pcs_s0ix_blkd_id;
260 u16 s0ix_total_occ_id;
261 u16 s0ix_shlw_occ_id;
262 u16 s0ix_deep_occ_id;
263 u16 s0ix_total_res_id;
264 u16 s0ix_shlw_res_id;
265 u16 s0ix_deep_res_id;
266 u16 pss_wakeup_id;
267 u16 ioss_d0ix_id;
268 u16 pstates_id;
269 u16 pss_idle_id;
270 u16 ioss_d3_id;
271 u16 ioss_pg_id;
272};
273
274static struct telemetry_debugfs_conf *debugfs_conf;
275
276static struct telemetry_debugfs_conf telem_apl_debugfs_conf = {
277 .pss_idle_data = telem_apl_pss_idle_data,
278 .pcs_idle_blkd_data = telem_apl_pcs_idle_blkd_data,
279 .pcs_s0ix_blkd_data = telem_apl_pcs_s0ix_blkd_data,
280 .pss_ltr_data = telem_apl_pss_ltr_data,
281 .pss_wakeup = telem_apl_pss_wakeup,
282 .ioss_d0ix_data = telem_apl_ioss_d0ix_data,
283 .ioss_pg_data = telem_apl_ioss_pg_data,
284
285 .pss_idle_evts = ARRAY_SIZE(telem_apl_pss_idle_data),
286 .pcs_idle_blkd_evts = ARRAY_SIZE(telem_apl_pcs_idle_blkd_data),
287 .pcs_s0ix_blkd_evts = ARRAY_SIZE(telem_apl_pcs_s0ix_blkd_data),
288 .pss_ltr_evts = ARRAY_SIZE(telem_apl_pss_ltr_data),
289 .pss_wakeup_evts = ARRAY_SIZE(telem_apl_pss_wakeup),
290 .ioss_d0ix_evts = ARRAY_SIZE(telem_apl_ioss_d0ix_data),
291 .ioss_pg_evts = ARRAY_SIZE(telem_apl_ioss_pg_data),
292
293 .pstates_id = TELEM_APL_PSS_PSTATES_ID,
294 .pss_idle_id = TELEM_APL_PSS_IDLE_ID,
295 .pcs_idle_blkd_id = TELEM_APL_PCS_IDLE_BLOCKED_ID,
296 .pcs_s0ix_blkd_id = TELEM_APL_PCS_S0IX_BLOCKED_ID,
297 .pss_wakeup_id = TELEM_APL_PSS_WAKEUP_ID,
298 .pss_ltr_blocking_id = TELEM_APL_PSS_LTR_BLOCKING_ID,
299 .s0ix_total_occ_id = TELEM_APL_S0IX_TOTAL_OCC_ID,
300 .s0ix_shlw_occ_id = TELEM_APL_S0IX_SHLW_OCC_ID,
301 .s0ix_deep_occ_id = TELEM_APL_S0IX_DEEP_OCC_ID,
302 .s0ix_total_res_id = TELEM_APL_S0IX_TOTAL_RES_ID,
303 .s0ix_shlw_res_id = TELEM_APL_S0IX_SHLW_RES_ID,
304 .s0ix_deep_res_id = TELEM_APL_S0IX_DEEP_RES_ID,
305 .ioss_d0ix_id = TELEM_APL_D0IX_ID,
306 .ioss_d3_id = TELEM_APL_D3_ID,
307 .ioss_pg_id = TELEM_APL_PG_ID,
308};
309
310static const struct x86_cpu_id telemetry_debugfs_cpu_ids[] = {
311 INTEL_CPU_FAM6(ATOM_GOLDMONT, telem_apl_debugfs_conf),
312 INTEL_CPU_FAM6(ATOM_GOLDMONT_PLUS, telem_apl_debugfs_conf),
313 {}
314};
315
316MODULE_DEVICE_TABLE(x86cpu, telemetry_debugfs_cpu_ids);
317
318static int telemetry_debugfs_check_evts(void)
319{
320 if ((debugfs_conf->pss_idle_evts > TELEM_PSS_IDLE_EVTS) ||
321 (debugfs_conf->pcs_idle_blkd_evts > TELEM_PSS_IDLE_BLOCKED_EVTS) ||
322 (debugfs_conf->pcs_s0ix_blkd_evts > TELEM_PSS_S0IX_BLOCKED_EVTS) ||
323 (debugfs_conf->pss_ltr_evts > TELEM_PSS_LTR_BLOCKING_EVTS) ||
324 (debugfs_conf->pss_wakeup_evts > TELEM_PSS_S0IX_WAKEUP_EVTS) ||
325 (debugfs_conf->ioss_d0ix_evts > TELEM_IOSS_DX_D0IX_EVTS) ||
326 (debugfs_conf->ioss_pg_evts > TELEM_IOSS_PG_EVTS))
327 return -EINVAL;
328
329 return 0;
330}
331
332static int telem_pss_states_show(struct seq_file *s, void *unused)
333{
334 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
335 struct telemetry_debugfs_conf *conf = debugfs_conf;
336 const char *name[TELEM_MAX_OS_ALLOCATED_EVENTS];
337 u32 pcs_idle_blkd[TELEM_PSS_IDLE_BLOCKED_EVTS],
338 pcs_s0ix_blkd[TELEM_PSS_S0IX_BLOCKED_EVTS],
339 pss_s0ix_wakeup[TELEM_PSS_S0IX_WAKEUP_EVTS],
340 pss_ltr_blkd[TELEM_PSS_LTR_BLOCKING_EVTS],
341 pss_idle[TELEM_PSS_IDLE_EVTS];
342 int index, idx, ret, err = 0;
343 u64 pstates = 0;
344
345 ret = telemetry_read_eventlog(TELEM_PSS, evtlog,
346 TELEM_MAX_OS_ALLOCATED_EVENTS);
347 if (ret < 0)
348 return ret;
349
350 err = telemetry_get_evtname(TELEM_PSS, name,
351 TELEM_MAX_OS_ALLOCATED_EVENTS);
352 if (err < 0)
353 return err;
354
355 seq_puts(s, "\n----------------------------------------------------\n");
356 seq_puts(s, "\tPSS TELEM EVENTLOG (Residency = field/19.2 us\n");
357 seq_puts(s, "----------------------------------------------------\n");
358 for (index = 0; index < ret; index++) {
359 seq_printf(s, "%-32s %llu\n",
360 name[index], evtlog[index].telem_evtlog);
361
362 /* Fetch PSS IDLE State */
363 if (evtlog[index].telem_evtid == conf->pss_idle_id) {
364 pss_idle[conf->pss_idle_evts - 1] =
365 (evtlog[index].telem_evtlog >>
366 conf->pss_idle_data[conf->pss_idle_evts - 1].bit_pos) &
367 TELEM_APL_MASK_PCS_STATE;
368 }
369
370 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_idle_id,
371 conf->pss_idle_evts - 1,
372 pss_idle, evtlog[index].telem_evtlog,
373 conf->pss_idle_data, TELEM_MASK_BIT);
374
375 TELEM_CHECK_AND_PARSE_EVTS(conf->pcs_idle_blkd_id,
376 conf->pcs_idle_blkd_evts,
377 pcs_idle_blkd,
378 evtlog[index].telem_evtlog,
379 conf->pcs_idle_blkd_data,
380 TELEM_MASK_BYTE);
381
382 TELEM_CHECK_AND_PARSE_EVTS(conf->pcs_s0ix_blkd_id,
383 conf->pcs_s0ix_blkd_evts,
384 pcs_s0ix_blkd,
385 evtlog[index].telem_evtlog,
386 conf->pcs_s0ix_blkd_data,
387 TELEM_MASK_BYTE);
388
389 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_wakeup_id,
390 conf->pss_wakeup_evts,
391 pss_s0ix_wakeup,
392 evtlog[index].telem_evtlog,
393 conf->pss_wakeup, TELEM_MASK_BYTE);
394
395 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_ltr_blocking_id,
396 conf->pss_ltr_evts, pss_ltr_blkd,
397 evtlog[index].telem_evtlog,
398 conf->pss_ltr_data, TELEM_MASK_BYTE);
399
400 if (evtlog[index].telem_evtid == debugfs_conf->pstates_id)
401 pstates = evtlog[index].telem_evtlog;
402 }
403
404 seq_puts(s, "\n--------------------------------------\n");
405 seq_puts(s, "PStates\n");
406 seq_puts(s, "--------------------------------------\n");
407 seq_puts(s, "Domain\t\t\t\tFreq(Mhz)\n");
408 seq_printf(s, " IA\t\t\t\t %llu\n GT\t\t\t\t %llu\n",
409 (pstates & TELEM_MASK_BYTE)*100,
410 ((pstates >> 8) & TELEM_MASK_BYTE)*50/3);
411
412 seq_printf(s, " IUNIT\t\t\t\t %llu\n SA\t\t\t\t %llu\n",
413 ((pstates >> 16) & TELEM_MASK_BYTE)*25,
414 ((pstates >> 24) & TELEM_MASK_BYTE)*50/3);
415
416 seq_puts(s, "\n--------------------------------------\n");
417 seq_puts(s, "PSS IDLE Status\n");
418 seq_puts(s, "--------------------------------------\n");
419 seq_puts(s, "Device\t\t\t\t\tIDLE\n");
420 for (index = 0; index < debugfs_conf->pss_idle_evts; index++) {
421 seq_printf(s, "%-32s\t%u\n",
422 debugfs_conf->pss_idle_data[index].name,
423 pss_idle[index]);
424 }
425
426 seq_puts(s, "\n--------------------------------------\n");
427 seq_puts(s, "PSS Idle blkd Status (~1ms saturating bucket)\n");
428 seq_puts(s, "--------------------------------------\n");
429 seq_puts(s, "Blocker\t\t\t\t\tCount\n");
430 for (index = 0; index < debugfs_conf->pcs_idle_blkd_evts; index++) {
431 seq_printf(s, "%-32s\t%u\n",
432 debugfs_conf->pcs_idle_blkd_data[index].name,
433 pcs_idle_blkd[index]);
434 }
435
436 seq_puts(s, "\n--------------------------------------\n");
437 seq_puts(s, "PSS S0ix blkd Status (~1ms saturating bucket)\n");
438 seq_puts(s, "--------------------------------------\n");
439 seq_puts(s, "Blocker\t\t\t\t\tCount\n");
440 for (index = 0; index < debugfs_conf->pcs_s0ix_blkd_evts; index++) {
441 seq_printf(s, "%-32s\t%u\n",
442 debugfs_conf->pcs_s0ix_blkd_data[index].name,
443 pcs_s0ix_blkd[index]);
444 }
445
446 seq_puts(s, "\n--------------------------------------\n");
447 seq_puts(s, "LTR Blocking Status (~1ms saturating bucket)\n");
448 seq_puts(s, "--------------------------------------\n");
449 seq_puts(s, "Blocker\t\t\t\t\tCount\n");
450 for (index = 0; index < debugfs_conf->pss_ltr_evts; index++) {
451 seq_printf(s, "%-32s\t%u\n",
452 debugfs_conf->pss_ltr_data[index].name,
453 pss_s0ix_wakeup[index]);
454 }
455
456 seq_puts(s, "\n--------------------------------------\n");
457 seq_puts(s, "Wakes Status (~1ms saturating bucket)\n");
458 seq_puts(s, "--------------------------------------\n");
459 seq_puts(s, "Wakes\t\t\t\t\tCount\n");
460 for (index = 0; index < debugfs_conf->pss_wakeup_evts; index++) {
461 seq_printf(s, "%-32s\t%u\n",
462 debugfs_conf->pss_wakeup[index].name,
463 pss_ltr_blkd[index]);
464 }
465
466 return 0;
467}
468
469static int telem_pss_state_open(struct inode *inode, struct file *file)
470{
471 return single_open(file, telem_pss_states_show, inode->i_private);
472}
473
474static const struct file_operations telem_pss_ops = {
475 .open = telem_pss_state_open,
476 .read = seq_read,
477 .llseek = seq_lseek,
478 .release = single_release,
479};
480
481static int telem_ioss_states_show(struct seq_file *s, void *unused)
482{
483 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
484 const char *name[TELEM_MAX_OS_ALLOCATED_EVENTS];
485 int index, ret, err;
486
487 ret = telemetry_read_eventlog(TELEM_IOSS, evtlog,
488 TELEM_MAX_OS_ALLOCATED_EVENTS);
489 if (ret < 0)
490 return ret;
491
492 err = telemetry_get_evtname(TELEM_IOSS, name,
493 TELEM_MAX_OS_ALLOCATED_EVENTS);
494 if (err < 0)
495 return err;
496
497 seq_puts(s, "--------------------------------------\n");
498 seq_puts(s, "\tI0SS TELEMETRY EVENTLOG\n");
499 seq_puts(s, "--------------------------------------\n");
500 for (index = 0; index < ret; index++) {
501 seq_printf(s, "%-32s 0x%llx\n",
502 name[index], evtlog[index].telem_evtlog);
503 }
504
505 return 0;
506}
507
508static int telem_ioss_state_open(struct inode *inode, struct file *file)
509{
510 return single_open(file, telem_ioss_states_show, inode->i_private);
511}
512
513static const struct file_operations telem_ioss_ops = {
514 .open = telem_ioss_state_open,
515 .read = seq_read,
516 .llseek = seq_lseek,
517 .release = single_release,
518};
519
520static int telem_soc_states_show(struct seq_file *s, void *unused)
521{
522 u32 d3_sts[TELEM_IOSS_DX_D0IX_EVTS], d0ix_sts[TELEM_IOSS_DX_D0IX_EVTS];
523 u32 pg_sts[TELEM_IOSS_PG_EVTS], pss_idle[TELEM_PSS_IDLE_EVTS];
524 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
525 u32 s0ix_total_ctr = 0, s0ix_shlw_ctr = 0, s0ix_deep_ctr = 0;
526 u64 s0ix_total_res = 0, s0ix_shlw_res = 0, s0ix_deep_res = 0;
527 struct telemetry_debugfs_conf *conf = debugfs_conf;
528 struct pci_dev *dev = NULL;
529 int index, idx, ret;
530 u32 d3_state;
531 u16 pmcsr;
532
533 ret = telemetry_read_eventlog(TELEM_IOSS, evtlog,
534 TELEM_MAX_OS_ALLOCATED_EVENTS);
535 if (ret < 0)
536 return ret;
537
538 for (index = 0; index < ret; index++) {
539 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_d3_id,
540 conf->ioss_d0ix_evts,
541 d3_sts, evtlog[index].telem_evtlog,
542 conf->ioss_d0ix_data,
543 TELEM_MASK_BIT);
544
545 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_pg_id, conf->ioss_pg_evts,
546 pg_sts, evtlog[index].telem_evtlog,
547 conf->ioss_pg_data, TELEM_MASK_BIT);
548
549 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_d0ix_id,
550 conf->ioss_d0ix_evts,
551 d0ix_sts, evtlog[index].telem_evtlog,
552 conf->ioss_d0ix_data,
553 TELEM_MASK_BIT);
554
555 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_total_occ_id,
556 s0ix_total_ctr);
557
558 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
559 s0ix_shlw_ctr);
560
561 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
562 s0ix_deep_ctr);
563
564 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_total_res_id,
565 s0ix_total_res);
566
567 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
568 s0ix_shlw_res);
569
570 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
571 s0ix_deep_res);
572 }
573
574 seq_puts(s, "\n---------------------------------------------------\n");
575 seq_puts(s, "S0IX Type\t\t\t Occurrence\t\t Residency(us)\n");
576 seq_puts(s, "---------------------------------------------------\n");
577
578 seq_printf(s, "S0IX Shallow\t\t\t %10u\t %10llu\n",
579 s0ix_shlw_ctr -
580 conf->suspend_stats.shlw_ctr,
581 (u64)((s0ix_shlw_res -
582 conf->suspend_stats.shlw_res)*10/192));
583
584 seq_printf(s, "S0IX Deep\t\t\t %10u\t %10llu\n",
585 s0ix_deep_ctr -
586 conf->suspend_stats.deep_ctr,
587 (u64)((s0ix_deep_res -
588 conf->suspend_stats.deep_res)*10/192));
589
590 seq_printf(s, "Suspend(With S0ixShallow)\t %10u\t %10llu\n",
591 conf->suspend_stats.shlw_ctr,
592 (u64)(conf->suspend_stats.shlw_res*10)/192);
593
594 seq_printf(s, "Suspend(With S0ixDeep)\t\t %10u\t %10llu\n",
595 conf->suspend_stats.deep_ctr,
596 (u64)(conf->suspend_stats.deep_res*10)/192);
597
598 seq_printf(s, "TOTAL S0IX\t\t\t %10u\t %10llu\n", s0ix_total_ctr,
599 (u64)(s0ix_total_res*10/192));
600 seq_puts(s, "\n-------------------------------------------------\n");
601 seq_puts(s, "\t\tDEVICE STATES\n");
602 seq_puts(s, "-------------------------------------------------\n");
603
604 for_each_pci_dev(dev) {
605 pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr);
606 d3_state = ((pmcsr & PCI_PM_CTRL_STATE_MASK) ==
607 (__force int)PCI_D3hot) ? 1 : 0;
608
609 seq_printf(s, "pci %04x %04X %s %20.20s: ",
610 dev->vendor, dev->device, dev_name(&dev->dev),
611 dev_driver_string(&dev->dev));
612 seq_printf(s, " d3:%x\n", d3_state);
613 }
614
615 seq_puts(s, "\n--------------------------------------\n");
616 seq_puts(s, "D3/D0i3 Status\n");
617 seq_puts(s, "--------------------------------------\n");
618 seq_puts(s, "Block\t\t D3\t D0i3\n");
619 for (index = 0; index < conf->ioss_d0ix_evts; index++) {
620 seq_printf(s, "%-10s\t %u\t %u\n",
621 conf->ioss_d0ix_data[index].name,
622 d3_sts[index], d0ix_sts[index]);
623 }
624
625 seq_puts(s, "\n--------------------------------------\n");
626 seq_puts(s, "South Complex PowerGate Status\n");
627 seq_puts(s, "--------------------------------------\n");
628 seq_puts(s, "Device\t\t PG\n");
629 for (index = 0; index < conf->ioss_pg_evts; index++) {
630 seq_printf(s, "%-10s\t %u\n",
631 conf->ioss_pg_data[index].name,
632 pg_sts[index]);
633 }
634
635 evtlog->telem_evtid = conf->pss_idle_id;
636 ret = telemetry_read_events(TELEM_PSS, evtlog, 1);
637 if (ret < 0)
638 return ret;
639
640 seq_puts(s, "\n-----------------------------------------\n");
641 seq_puts(s, "North Idle Status\n");
642 seq_puts(s, "-----------------------------------------\n");
643 for (idx = 0; idx < conf->pss_idle_evts - 1; idx++) {
644 pss_idle[idx] = (evtlog->telem_evtlog >>
645 conf->pss_idle_data[idx].bit_pos) &
646 TELEM_MASK_BIT;
647 }
648
649 pss_idle[idx] = (evtlog->telem_evtlog >>
650 conf->pss_idle_data[idx].bit_pos) &
651 TELEM_APL_MASK_PCS_STATE;
652
653 for (index = 0; index < conf->pss_idle_evts; index++) {
654 seq_printf(s, "%-30s %u\n",
655 conf->pss_idle_data[index].name,
656 pss_idle[index]);
657 }
658
659 seq_puts(s, "\nPCS_STATUS Code\n");
660 seq_puts(s, "0:C0 1:C1 2:C1_DN_WT_DEV 3:C2 4:C2_WT_DE_MEM_UP\n");
661 seq_puts(s, "5:C2_WT_DE_MEM_DOWN 6:C2_UP_WT_DEV 7:C2_DN 8:C2_VOA\n");
662 seq_puts(s, "9:C2_VOA_UP 10:S0IX_PRE 11:S0IX\n");
663
664 return 0;
665}
666
667static int telem_soc_state_open(struct inode *inode, struct file *file)
668{
669 return single_open(file, telem_soc_states_show, inode->i_private);
670}
671
672static const struct file_operations telem_socstate_ops = {
673 .open = telem_soc_state_open,
674 .read = seq_read,
675 .llseek = seq_lseek,
676 .release = single_release,
677};
678
679static int telem_s0ix_res_get(void *data, u64 *val)
680{
681 u64 s0ix_total_res;
682 int ret;
683
684 ret = intel_pmc_s0ix_counter_read(&s0ix_total_res);
685 if (ret) {
686 pr_err("Failed to read S0ix residency");
687 return ret;
688 }
689
690 *val = s0ix_total_res;
691
692 return 0;
693}
694
695DEFINE_DEBUGFS_ATTRIBUTE(telem_s0ix_fops, telem_s0ix_res_get, NULL, "%llu\n");
696
697static int telem_pss_trc_verb_show(struct seq_file *s, void *unused)
698{
699 u32 verbosity;
700 int err;
701
702 err = telemetry_get_trace_verbosity(TELEM_PSS, &verbosity);
703 if (err) {
704 pr_err("Get PSS Trace Verbosity Failed with Error %d\n", err);
705 return -EFAULT;
706 }
707
708 seq_printf(s, "PSS Trace Verbosity %u\n", verbosity);
709 return 0;
710}
711
712static ssize_t telem_pss_trc_verb_write(struct file *file,
713 const char __user *userbuf,
714 size_t count, loff_t *ppos)
715{
716 u32 verbosity;
717 int err;
718
719 if (kstrtou32_from_user(userbuf, count, 0, &verbosity))
720 return -EFAULT;
721
722 err = telemetry_set_trace_verbosity(TELEM_PSS, verbosity);
723 if (err) {
724 pr_err("Changing PSS Trace Verbosity Failed. Error %d\n", err);
725 count = err;
726 }
727
728 return count;
729}
730
731static int telem_pss_trc_verb_open(struct inode *inode, struct file *file)
732{
733 return single_open(file, telem_pss_trc_verb_show, inode->i_private);
734}
735
736static const struct file_operations telem_pss_trc_verb_ops = {
737 .open = telem_pss_trc_verb_open,
738 .read = seq_read,
739 .write = telem_pss_trc_verb_write,
740 .llseek = seq_lseek,
741 .release = single_release,
742};
743
744static int telem_ioss_trc_verb_show(struct seq_file *s, void *unused)
745{
746 u32 verbosity;
747 int err;
748
749 err = telemetry_get_trace_verbosity(TELEM_IOSS, &verbosity);
750 if (err) {
751 pr_err("Get IOSS Trace Verbosity Failed with Error %d\n", err);
752 return -EFAULT;
753 }
754
755 seq_printf(s, "IOSS Trace Verbosity %u\n", verbosity);
756 return 0;
757}
758
759static ssize_t telem_ioss_trc_verb_write(struct file *file,
760 const char __user *userbuf,
761 size_t count, loff_t *ppos)
762{
763 u32 verbosity;
764 int err;
765
766 if (kstrtou32_from_user(userbuf, count, 0, &verbosity))
767 return -EFAULT;
768
769 err = telemetry_set_trace_verbosity(TELEM_IOSS, verbosity);
770 if (err) {
771 pr_err("Changing IOSS Trace Verbosity Failed. Error %d\n", err);
772 count = err;
773 }
774
775 return count;
776}
777
778static int telem_ioss_trc_verb_open(struct inode *inode, struct file *file)
779{
780 return single_open(file, telem_ioss_trc_verb_show, inode->i_private);
781}
782
783static const struct file_operations telem_ioss_trc_verb_ops = {
784 .open = telem_ioss_trc_verb_open,
785 .read = seq_read,
786 .write = telem_ioss_trc_verb_write,
787 .llseek = seq_lseek,
788 .release = single_release,
789};
790
791static int pm_suspend_prep_cb(void)
792{
793 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
794 struct telemetry_debugfs_conf *conf = debugfs_conf;
795 int ret, index;
796
797 ret = telemetry_raw_read_eventlog(TELEM_IOSS, evtlog,
798 TELEM_MAX_OS_ALLOCATED_EVENTS);
799 if (ret < 0) {
800 suspend_prep_ok = 0;
801 goto out;
802 }
803
804 for (index = 0; index < ret; index++) {
805
806 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
807 suspend_shlw_ctr_temp);
808
809 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
810 suspend_deep_ctr_temp);
811
812 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
813 suspend_shlw_res_temp);
814
815 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
816 suspend_deep_res_temp);
817 }
818 suspend_prep_ok = 1;
819out:
820 return NOTIFY_OK;
821}
822
823static int pm_suspend_exit_cb(void)
824{
825 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
826 static u32 suspend_shlw_ctr_exit, suspend_deep_ctr_exit;
827 static u64 suspend_shlw_res_exit, suspend_deep_res_exit;
828 struct telemetry_debugfs_conf *conf = debugfs_conf;
829 int ret, index;
830
831 if (!suspend_prep_ok)
832 goto out;
833
834 ret = telemetry_raw_read_eventlog(TELEM_IOSS, evtlog,
835 TELEM_MAX_OS_ALLOCATED_EVENTS);
836 if (ret < 0)
837 goto out;
838
839 for (index = 0; index < ret; index++) {
840 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
841 suspend_shlw_ctr_exit);
842
843 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
844 suspend_deep_ctr_exit);
845
846 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
847 suspend_shlw_res_exit);
848
849 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
850 suspend_deep_res_exit);
851 }
852
853 if ((suspend_shlw_ctr_exit < suspend_shlw_ctr_temp) ||
854 (suspend_deep_ctr_exit < suspend_deep_ctr_temp) ||
855 (suspend_shlw_res_exit < suspend_shlw_res_temp) ||
856 (suspend_deep_res_exit < suspend_deep_res_temp)) {
857 pr_err("Wrong s0ix counters detected\n");
858 goto out;
859 }
860
861 /*
862 * Due to some design limitations in the firmware, sometimes the
863 * counters do not get updated by the time we reach here. As a
864 * workaround, we try to see if this was a genuine case of sleep
865 * failure or not by cross-checking from PMC GCR registers directly.
866 */
867 if (suspend_shlw_ctr_exit == suspend_shlw_ctr_temp &&
868 suspend_deep_ctr_exit == suspend_deep_ctr_temp) {
869 ret = intel_pmc_gcr_read64(PMC_GCR_TELEM_SHLW_S0IX_REG,
870 &suspend_shlw_res_exit);
871 if (ret < 0)
872 goto out;
873
874 ret = intel_pmc_gcr_read64(PMC_GCR_TELEM_DEEP_S0IX_REG,
875 &suspend_deep_res_exit);
876 if (ret < 0)
877 goto out;
878
879 if (suspend_shlw_res_exit > suspend_shlw_res_temp)
880 suspend_shlw_ctr_exit++;
881
882 if (suspend_deep_res_exit > suspend_deep_res_temp)
883 suspend_deep_ctr_exit++;
884 }
885
886 suspend_shlw_ctr_exit -= suspend_shlw_ctr_temp;
887 suspend_deep_ctr_exit -= suspend_deep_ctr_temp;
888 suspend_shlw_res_exit -= suspend_shlw_res_temp;
889 suspend_deep_res_exit -= suspend_deep_res_temp;
890
891 if (suspend_shlw_ctr_exit != 0) {
892 conf->suspend_stats.shlw_ctr +=
893 suspend_shlw_ctr_exit;
894
895 conf->suspend_stats.shlw_res +=
896 suspend_shlw_res_exit;
897 }
898
899 if (suspend_deep_ctr_exit != 0) {
900 conf->suspend_stats.deep_ctr +=
901 suspend_deep_ctr_exit;
902
903 conf->suspend_stats.deep_res +=
904 suspend_deep_res_exit;
905 }
906
907out:
908 suspend_prep_ok = 0;
909 return NOTIFY_OK;
910}
911
912static int pm_notification(struct notifier_block *this,
913 unsigned long event, void *ptr)
914{
915 switch (event) {
916 case PM_SUSPEND_PREPARE:
917 return pm_suspend_prep_cb();
918 case PM_POST_SUSPEND:
919 return pm_suspend_exit_cb();
920 }
921
922 return NOTIFY_DONE;
923}
924
925static struct notifier_block pm_notifier = {
926 .notifier_call = pm_notification,
927};
928
929static int __init telemetry_debugfs_init(void)
930{
931 const struct x86_cpu_id *id;
932 int err;
933 struct dentry *f;
934
935 /* Only APL supported for now */
936 id = x86_match_cpu(telemetry_debugfs_cpu_ids);
937 if (!id)
938 return -ENODEV;
939
940 debugfs_conf = (struct telemetry_debugfs_conf *)id->driver_data;
941
942 err = telemetry_pltconfig_valid();
943 if (err < 0) {
944 pr_info("Invalid pltconfig, ensure IPC1 device is enabled in BIOS\n");
945 return -ENODEV;
946 }
947
948 err = telemetry_debugfs_check_evts();
949 if (err < 0) {
950 pr_info("telemetry_debugfs_check_evts failed\n");
951 return -EINVAL;
952 }
953
954 register_pm_notifier(&pm_notifier);
955
956 err = -ENOMEM;
957 debugfs_conf->telemetry_dbg_dir = debugfs_create_dir("telemetry", NULL);
958 if (!debugfs_conf->telemetry_dbg_dir)
959 goto out_pm;
960
961 f = debugfs_create_file("pss_info", S_IFREG | S_IRUGO,
962 debugfs_conf->telemetry_dbg_dir, NULL,
963 &telem_pss_ops);
964 if (!f) {
965 pr_err("pss_sample_info debugfs register failed\n");
966 goto out;
967 }
968
969 f = debugfs_create_file("ioss_info", S_IFREG | S_IRUGO,
970 debugfs_conf->telemetry_dbg_dir, NULL,
971 &telem_ioss_ops);
972 if (!f) {
973 pr_err("ioss_sample_info debugfs register failed\n");
974 goto out;
975 }
976
977 f = debugfs_create_file("soc_states", S_IFREG | S_IRUGO,
978 debugfs_conf->telemetry_dbg_dir,
979 NULL, &telem_socstate_ops);
980 if (!f) {
981 pr_err("ioss_sample_info debugfs register failed\n");
982 goto out;
983 }
984
985 f = debugfs_create_file("s0ix_residency_usec", S_IFREG | S_IRUGO,
986 debugfs_conf->telemetry_dbg_dir,
987 NULL, &telem_s0ix_fops);
988 if (!f) {
989 pr_err("s0ix_residency_usec debugfs register failed\n");
990 goto out;
991 }
992
993 f = debugfs_create_file("pss_trace_verbosity", S_IFREG | S_IRUGO,
994 debugfs_conf->telemetry_dbg_dir, NULL,
995 &telem_pss_trc_verb_ops);
996 if (!f) {
997 pr_err("pss_trace_verbosity debugfs register failed\n");
998 goto out;
999 }
1000
1001 f = debugfs_create_file("ioss_trace_verbosity", S_IFREG | S_IRUGO,
1002 debugfs_conf->telemetry_dbg_dir, NULL,
1003 &telem_ioss_trc_verb_ops);
1004 if (!f) {
1005 pr_err("ioss_trace_verbosity debugfs register failed\n");
1006 goto out;
1007 }
1008
1009 return 0;
1010
1011out:
1012 debugfs_remove_recursive(debugfs_conf->telemetry_dbg_dir);
1013 debugfs_conf->telemetry_dbg_dir = NULL;
1014out_pm:
1015 unregister_pm_notifier(&pm_notifier);
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 unregister_pm_notifier(&pm_notifier);
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 v2");