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/mfd/intel_pmc_bxt.h>
19 #include <linux/module.h>
20 #include <linux/pci.h>
21 #include <linux/seq_file.h>
22 #include <linux/suspend.h>
23
24 #include <asm/cpu_device_id.h>
25 #include <asm/intel-family.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
83 static u8 suspend_prep_ok;
84 static u32 suspend_shlw_ctr_temp, suspend_deep_ctr_temp;
85 static u64 suspend_shlw_res_temp, suspend_deep_res_temp;
86
87 struct 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 */
95 struct telem_pss_idle_stateinfo {
96 const char *name;
97 u32 bit_pos;
98 };
99
100 static 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
119 struct telem_pcs_blkd_info {
120 const char *name;
121 u32 bit_pos;
122 };
123
124 static 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
134 static 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
145 struct telem_pss_ltr_info {
146 const char *name;
147 u32 bit_pos;
148 };
149
150 static 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
160 struct telem_pss_wakeup_info {
161 const char *name;
162 u32 bit_pos;
163 };
164
165 static 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
175 struct telem_ioss_d0ix_stateinfo {
176 const char *name;
177 u32 bit_pos;
178 };
179
180 static 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
202 struct telem_ioss_pg_info {
203 const char *name;
204 u32 bit_pos;
205 };
206
207 static 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
236 struct 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
274 static struct telemetry_debugfs_conf *debugfs_conf;
275
276 static 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
310 static const struct x86_cpu_id telemetry_debugfs_cpu_ids[] = {
311 X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT, &telem_apl_debugfs_conf),
312 X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT_PLUS, &telem_apl_debugfs_conf),
313 {}
314 };
315 MODULE_DEVICE_TABLE(x86cpu, telemetry_debugfs_cpu_ids);
316
telemetry_debugfs_check_evts(void)317 static int telemetry_debugfs_check_evts(void)
318 {
319 if ((debugfs_conf->pss_idle_evts > TELEM_PSS_IDLE_EVTS) ||
320 (debugfs_conf->pcs_idle_blkd_evts > TELEM_PSS_IDLE_BLOCKED_EVTS) ||
321 (debugfs_conf->pcs_s0ix_blkd_evts > TELEM_PSS_S0IX_BLOCKED_EVTS) ||
322 (debugfs_conf->pss_ltr_evts > TELEM_PSS_LTR_BLOCKING_EVTS) ||
323 (debugfs_conf->pss_wakeup_evts > TELEM_PSS_S0IX_WAKEUP_EVTS) ||
324 (debugfs_conf->ioss_d0ix_evts > TELEM_IOSS_DX_D0IX_EVTS) ||
325 (debugfs_conf->ioss_pg_evts > TELEM_IOSS_PG_EVTS))
326 return -EINVAL;
327
328 return 0;
329 }
330
telem_pss_states_show(struct seq_file * s,void * unused)331 static int telem_pss_states_show(struct seq_file *s, void *unused)
332 {
333 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
334 struct telemetry_debugfs_conf *conf = debugfs_conf;
335 const char *name[TELEM_MAX_OS_ALLOCATED_EVENTS];
336 u32 pcs_idle_blkd[TELEM_PSS_IDLE_BLOCKED_EVTS],
337 pcs_s0ix_blkd[TELEM_PSS_S0IX_BLOCKED_EVTS],
338 pss_s0ix_wakeup[TELEM_PSS_S0IX_WAKEUP_EVTS],
339 pss_ltr_blkd[TELEM_PSS_LTR_BLOCKING_EVTS],
340 pss_idle[TELEM_PSS_IDLE_EVTS];
341 int index, idx, ret, err = 0;
342 u64 pstates = 0;
343
344 ret = telemetry_read_eventlog(TELEM_PSS, evtlog,
345 TELEM_MAX_OS_ALLOCATED_EVENTS);
346 if (ret < 0)
347 return ret;
348
349 err = telemetry_get_evtname(TELEM_PSS, name,
350 TELEM_MAX_OS_ALLOCATED_EVENTS);
351 if (err < 0)
352 return err;
353
354 seq_puts(s, "\n----------------------------------------------------\n");
355 seq_puts(s, "\tPSS TELEM EVENTLOG (Residency = field/19.2 us\n");
356 seq_puts(s, "----------------------------------------------------\n");
357 for (index = 0; index < ret; index++) {
358 seq_printf(s, "%-32s %llu\n",
359 name[index], evtlog[index].telem_evtlog);
360
361 /* Fetch PSS IDLE State */
362 if (evtlog[index].telem_evtid == conf->pss_idle_id) {
363 pss_idle[conf->pss_idle_evts - 1] =
364 (evtlog[index].telem_evtlog >>
365 conf->pss_idle_data[conf->pss_idle_evts - 1].bit_pos) &
366 TELEM_APL_MASK_PCS_STATE;
367 }
368
369 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_idle_id,
370 conf->pss_idle_evts - 1,
371 pss_idle, evtlog[index].telem_evtlog,
372 conf->pss_idle_data, TELEM_MASK_BIT);
373
374 TELEM_CHECK_AND_PARSE_EVTS(conf->pcs_idle_blkd_id,
375 conf->pcs_idle_blkd_evts,
376 pcs_idle_blkd,
377 evtlog[index].telem_evtlog,
378 conf->pcs_idle_blkd_data,
379 TELEM_MASK_BYTE);
380
381 TELEM_CHECK_AND_PARSE_EVTS(conf->pcs_s0ix_blkd_id,
382 conf->pcs_s0ix_blkd_evts,
383 pcs_s0ix_blkd,
384 evtlog[index].telem_evtlog,
385 conf->pcs_s0ix_blkd_data,
386 TELEM_MASK_BYTE);
387
388 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_wakeup_id,
389 conf->pss_wakeup_evts,
390 pss_s0ix_wakeup,
391 evtlog[index].telem_evtlog,
392 conf->pss_wakeup, TELEM_MASK_BYTE);
393
394 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_ltr_blocking_id,
395 conf->pss_ltr_evts, pss_ltr_blkd,
396 evtlog[index].telem_evtlog,
397 conf->pss_ltr_data, TELEM_MASK_BYTE);
398
399 if (evtlog[index].telem_evtid == debugfs_conf->pstates_id)
400 pstates = evtlog[index].telem_evtlog;
401 }
402
403 seq_puts(s, "\n--------------------------------------\n");
404 seq_puts(s, "PStates\n");
405 seq_puts(s, "--------------------------------------\n");
406 seq_puts(s, "Domain\t\t\t\tFreq(Mhz)\n");
407 seq_printf(s, " IA\t\t\t\t %llu\n GT\t\t\t\t %llu\n",
408 (pstates & TELEM_MASK_BYTE)*100,
409 ((pstates >> 8) & TELEM_MASK_BYTE)*50/3);
410
411 seq_printf(s, " IUNIT\t\t\t\t %llu\n SA\t\t\t\t %llu\n",
412 ((pstates >> 16) & TELEM_MASK_BYTE)*25,
413 ((pstates >> 24) & TELEM_MASK_BYTE)*50/3);
414
415 seq_puts(s, "\n--------------------------------------\n");
416 seq_puts(s, "PSS IDLE Status\n");
417 seq_puts(s, "--------------------------------------\n");
418 seq_puts(s, "Device\t\t\t\t\tIDLE\n");
419 for (index = 0; index < debugfs_conf->pss_idle_evts; index++) {
420 seq_printf(s, "%-32s\t%u\n",
421 debugfs_conf->pss_idle_data[index].name,
422 pss_idle[index]);
423 }
424
425 seq_puts(s, "\n--------------------------------------\n");
426 seq_puts(s, "PSS Idle blkd Status (~1ms saturating bucket)\n");
427 seq_puts(s, "--------------------------------------\n");
428 seq_puts(s, "Blocker\t\t\t\t\tCount\n");
429 for (index = 0; index < debugfs_conf->pcs_idle_blkd_evts; index++) {
430 seq_printf(s, "%-32s\t%u\n",
431 debugfs_conf->pcs_idle_blkd_data[index].name,
432 pcs_idle_blkd[index]);
433 }
434
435 seq_puts(s, "\n--------------------------------------\n");
436 seq_puts(s, "PSS S0ix blkd Status (~1ms saturating bucket)\n");
437 seq_puts(s, "--------------------------------------\n");
438 seq_puts(s, "Blocker\t\t\t\t\tCount\n");
439 for (index = 0; index < debugfs_conf->pcs_s0ix_blkd_evts; index++) {
440 seq_printf(s, "%-32s\t%u\n",
441 debugfs_conf->pcs_s0ix_blkd_data[index].name,
442 pcs_s0ix_blkd[index]);
443 }
444
445 seq_puts(s, "\n--------------------------------------\n");
446 seq_puts(s, "LTR Blocking Status (~1ms saturating bucket)\n");
447 seq_puts(s, "--------------------------------------\n");
448 seq_puts(s, "Blocker\t\t\t\t\tCount\n");
449 for (index = 0; index < debugfs_conf->pss_ltr_evts; index++) {
450 seq_printf(s, "%-32s\t%u\n",
451 debugfs_conf->pss_ltr_data[index].name,
452 pss_s0ix_wakeup[index]);
453 }
454
455 seq_puts(s, "\n--------------------------------------\n");
456 seq_puts(s, "Wakes Status (~1ms saturating bucket)\n");
457 seq_puts(s, "--------------------------------------\n");
458 seq_puts(s, "Wakes\t\t\t\t\tCount\n");
459 for (index = 0; index < debugfs_conf->pss_wakeup_evts; index++) {
460 seq_printf(s, "%-32s\t%u\n",
461 debugfs_conf->pss_wakeup[index].name,
462 pss_ltr_blkd[index]);
463 }
464
465 return 0;
466 }
467
468 DEFINE_SHOW_ATTRIBUTE(telem_pss_states);
469
telem_ioss_states_show(struct seq_file * s,void * unused)470 static int telem_ioss_states_show(struct seq_file *s, void *unused)
471 {
472 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
473 const char *name[TELEM_MAX_OS_ALLOCATED_EVENTS];
474 int index, ret, err;
475
476 ret = telemetry_read_eventlog(TELEM_IOSS, evtlog,
477 TELEM_MAX_OS_ALLOCATED_EVENTS);
478 if (ret < 0)
479 return ret;
480
481 err = telemetry_get_evtname(TELEM_IOSS, name,
482 TELEM_MAX_OS_ALLOCATED_EVENTS);
483 if (err < 0)
484 return err;
485
486 seq_puts(s, "--------------------------------------\n");
487 seq_puts(s, "\tI0SS TELEMETRY EVENTLOG\n");
488 seq_puts(s, "--------------------------------------\n");
489 for (index = 0; index < ret; index++) {
490 seq_printf(s, "%-32s 0x%llx\n",
491 name[index], evtlog[index].telem_evtlog);
492 }
493
494 return 0;
495 }
496
497 DEFINE_SHOW_ATTRIBUTE(telem_ioss_states);
498
telem_soc_states_show(struct seq_file * s,void * unused)499 static int telem_soc_states_show(struct seq_file *s, void *unused)
500 {
501 u32 d3_sts[TELEM_IOSS_DX_D0IX_EVTS], d0ix_sts[TELEM_IOSS_DX_D0IX_EVTS];
502 u32 pg_sts[TELEM_IOSS_PG_EVTS], pss_idle[TELEM_PSS_IDLE_EVTS];
503 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
504 u32 s0ix_total_ctr = 0, s0ix_shlw_ctr = 0, s0ix_deep_ctr = 0;
505 u64 s0ix_total_res = 0, s0ix_shlw_res = 0, s0ix_deep_res = 0;
506 struct telemetry_debugfs_conf *conf = debugfs_conf;
507 struct pci_dev *dev = NULL;
508 int index, idx, ret;
509 u32 d3_state;
510 u16 pmcsr;
511
512 ret = telemetry_read_eventlog(TELEM_IOSS, evtlog,
513 TELEM_MAX_OS_ALLOCATED_EVENTS);
514 if (ret < 0)
515 return ret;
516
517 for (index = 0; index < ret; index++) {
518 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_d3_id,
519 conf->ioss_d0ix_evts,
520 d3_sts, evtlog[index].telem_evtlog,
521 conf->ioss_d0ix_data,
522 TELEM_MASK_BIT);
523
524 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_pg_id, conf->ioss_pg_evts,
525 pg_sts, evtlog[index].telem_evtlog,
526 conf->ioss_pg_data, TELEM_MASK_BIT);
527
528 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_d0ix_id,
529 conf->ioss_d0ix_evts,
530 d0ix_sts, evtlog[index].telem_evtlog,
531 conf->ioss_d0ix_data,
532 TELEM_MASK_BIT);
533
534 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_total_occ_id,
535 s0ix_total_ctr);
536
537 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
538 s0ix_shlw_ctr);
539
540 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
541 s0ix_deep_ctr);
542
543 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_total_res_id,
544 s0ix_total_res);
545
546 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
547 s0ix_shlw_res);
548
549 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
550 s0ix_deep_res);
551 }
552
553 seq_puts(s, "\n---------------------------------------------------\n");
554 seq_puts(s, "S0IX Type\t\t\t Occurrence\t\t Residency(us)\n");
555 seq_puts(s, "---------------------------------------------------\n");
556
557 seq_printf(s, "S0IX Shallow\t\t\t %10u\t %10llu\n",
558 s0ix_shlw_ctr -
559 conf->suspend_stats.shlw_ctr,
560 (u64)((s0ix_shlw_res -
561 conf->suspend_stats.shlw_res)*10/192));
562
563 seq_printf(s, "S0IX Deep\t\t\t %10u\t %10llu\n",
564 s0ix_deep_ctr -
565 conf->suspend_stats.deep_ctr,
566 (u64)((s0ix_deep_res -
567 conf->suspend_stats.deep_res)*10/192));
568
569 seq_printf(s, "Suspend(With S0ixShallow)\t %10u\t %10llu\n",
570 conf->suspend_stats.shlw_ctr,
571 (u64)(conf->suspend_stats.shlw_res*10)/192);
572
573 seq_printf(s, "Suspend(With S0ixDeep)\t\t %10u\t %10llu\n",
574 conf->suspend_stats.deep_ctr,
575 (u64)(conf->suspend_stats.deep_res*10)/192);
576
577 seq_printf(s, "TOTAL S0IX\t\t\t %10u\t %10llu\n", s0ix_total_ctr,
578 (u64)(s0ix_total_res*10/192));
579 seq_puts(s, "\n-------------------------------------------------\n");
580 seq_puts(s, "\t\tDEVICE STATES\n");
581 seq_puts(s, "-------------------------------------------------\n");
582
583 for_each_pci_dev(dev) {
584 pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr);
585 d3_state = ((pmcsr & PCI_PM_CTRL_STATE_MASK) ==
586 (__force int)PCI_D3hot) ? 1 : 0;
587
588 seq_printf(s, "pci %04x %04X %s %20.20s: ",
589 dev->vendor, dev->device, dev_name(&dev->dev),
590 dev_driver_string(&dev->dev));
591 seq_printf(s, " d3:%x\n", d3_state);
592 }
593
594 seq_puts(s, "\n--------------------------------------\n");
595 seq_puts(s, "D3/D0i3 Status\n");
596 seq_puts(s, "--------------------------------------\n");
597 seq_puts(s, "Block\t\t D3\t D0i3\n");
598 for (index = 0; index < conf->ioss_d0ix_evts; index++) {
599 seq_printf(s, "%-10s\t %u\t %u\n",
600 conf->ioss_d0ix_data[index].name,
601 d3_sts[index], d0ix_sts[index]);
602 }
603
604 seq_puts(s, "\n--------------------------------------\n");
605 seq_puts(s, "South Complex PowerGate Status\n");
606 seq_puts(s, "--------------------------------------\n");
607 seq_puts(s, "Device\t\t PG\n");
608 for (index = 0; index < conf->ioss_pg_evts; index++) {
609 seq_printf(s, "%-10s\t %u\n",
610 conf->ioss_pg_data[index].name,
611 pg_sts[index]);
612 }
613
614 evtlog->telem_evtid = conf->pss_idle_id;
615 ret = telemetry_read_events(TELEM_PSS, evtlog, 1);
616 if (ret < 0)
617 return ret;
618
619 seq_puts(s, "\n-----------------------------------------\n");
620 seq_puts(s, "North Idle Status\n");
621 seq_puts(s, "-----------------------------------------\n");
622 for (idx = 0; idx < conf->pss_idle_evts - 1; idx++) {
623 pss_idle[idx] = (evtlog->telem_evtlog >>
624 conf->pss_idle_data[idx].bit_pos) &
625 TELEM_MASK_BIT;
626 }
627
628 pss_idle[idx] = (evtlog->telem_evtlog >>
629 conf->pss_idle_data[idx].bit_pos) &
630 TELEM_APL_MASK_PCS_STATE;
631
632 for (index = 0; index < conf->pss_idle_evts; index++) {
633 seq_printf(s, "%-30s %u\n",
634 conf->pss_idle_data[index].name,
635 pss_idle[index]);
636 }
637
638 seq_puts(s, "\nPCS_STATUS Code\n");
639 seq_puts(s, "0:C0 1:C1 2:C1_DN_WT_DEV 3:C2 4:C2_WT_DE_MEM_UP\n");
640 seq_puts(s, "5:C2_WT_DE_MEM_DOWN 6:C2_UP_WT_DEV 7:C2_DN 8:C2_VOA\n");
641 seq_puts(s, "9:C2_VOA_UP 10:S0IX_PRE 11:S0IX\n");
642
643 return 0;
644 }
645
646 DEFINE_SHOW_ATTRIBUTE(telem_soc_states);
647
telem_s0ix_res_get(void * data,u64 * val)648 static int telem_s0ix_res_get(void *data, u64 *val)
649 {
650 struct telemetry_plt_config *plt_config = telemetry_get_pltdata();
651 u64 s0ix_total_res;
652 int ret;
653
654 ret = intel_pmc_s0ix_counter_read(plt_config->pmc, &s0ix_total_res);
655 if (ret) {
656 pr_err("Failed to read S0ix residency");
657 return ret;
658 }
659
660 *val = s0ix_total_res;
661
662 return 0;
663 }
664
665 DEFINE_DEBUGFS_ATTRIBUTE(telem_s0ix_fops, telem_s0ix_res_get, NULL, "%llu\n");
666
telem_pss_trc_verb_show(struct seq_file * s,void * unused)667 static int telem_pss_trc_verb_show(struct seq_file *s, void *unused)
668 {
669 u32 verbosity;
670 int err;
671
672 err = telemetry_get_trace_verbosity(TELEM_PSS, &verbosity);
673 if (err) {
674 pr_err("Get PSS Trace Verbosity Failed with Error %d\n", err);
675 return -EFAULT;
676 }
677
678 seq_printf(s, "PSS Trace Verbosity %u\n", verbosity);
679 return 0;
680 }
681
telem_pss_trc_verb_write(struct file * file,const char __user * userbuf,size_t count,loff_t * ppos)682 static ssize_t telem_pss_trc_verb_write(struct file *file,
683 const char __user *userbuf,
684 size_t count, loff_t *ppos)
685 {
686 u32 verbosity;
687 int err;
688
689 err = kstrtou32_from_user(userbuf, count, 0, &verbosity);
690 if (err)
691 return err;
692
693 err = telemetry_set_trace_verbosity(TELEM_PSS, verbosity);
694 if (err) {
695 pr_err("Changing PSS Trace Verbosity Failed. Error %d\n", err);
696 return err;
697 }
698
699 return count;
700 }
701
telem_pss_trc_verb_open(struct inode * inode,struct file * file)702 static int telem_pss_trc_verb_open(struct inode *inode, struct file *file)
703 {
704 return single_open(file, telem_pss_trc_verb_show, inode->i_private);
705 }
706
707 static const struct file_operations telem_pss_trc_verb_ops = {
708 .open = telem_pss_trc_verb_open,
709 .read = seq_read,
710 .write = telem_pss_trc_verb_write,
711 .llseek = seq_lseek,
712 .release = single_release,
713 };
714
telem_ioss_trc_verb_show(struct seq_file * s,void * unused)715 static int telem_ioss_trc_verb_show(struct seq_file *s, void *unused)
716 {
717 u32 verbosity;
718 int err;
719
720 err = telemetry_get_trace_verbosity(TELEM_IOSS, &verbosity);
721 if (err) {
722 pr_err("Get IOSS Trace Verbosity Failed with Error %d\n", err);
723 return -EFAULT;
724 }
725
726 seq_printf(s, "IOSS Trace Verbosity %u\n", verbosity);
727 return 0;
728 }
729
telem_ioss_trc_verb_write(struct file * file,const char __user * userbuf,size_t count,loff_t * ppos)730 static ssize_t telem_ioss_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 err = kstrtou32_from_user(userbuf, count, 0, &verbosity);
738 if (err)
739 return err;
740
741 err = telemetry_set_trace_verbosity(TELEM_IOSS, verbosity);
742 if (err) {
743 pr_err("Changing IOSS Trace Verbosity Failed. Error %d\n", err);
744 return err;
745 }
746
747 return count;
748 }
749
telem_ioss_trc_verb_open(struct inode * inode,struct file * file)750 static int telem_ioss_trc_verb_open(struct inode *inode, struct file *file)
751 {
752 return single_open(file, telem_ioss_trc_verb_show, inode->i_private);
753 }
754
755 static const struct file_operations telem_ioss_trc_verb_ops = {
756 .open = telem_ioss_trc_verb_open,
757 .read = seq_read,
758 .write = telem_ioss_trc_verb_write,
759 .llseek = seq_lseek,
760 .release = single_release,
761 };
762
pm_suspend_prep_cb(void)763 static int pm_suspend_prep_cb(void)
764 {
765 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
766 struct telemetry_debugfs_conf *conf = debugfs_conf;
767 int ret, index;
768
769 ret = telemetry_raw_read_eventlog(TELEM_IOSS, evtlog,
770 TELEM_MAX_OS_ALLOCATED_EVENTS);
771 if (ret < 0) {
772 suspend_prep_ok = 0;
773 goto out;
774 }
775
776 for (index = 0; index < ret; index++) {
777
778 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
779 suspend_shlw_ctr_temp);
780
781 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
782 suspend_deep_ctr_temp);
783
784 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
785 suspend_shlw_res_temp);
786
787 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
788 suspend_deep_res_temp);
789 }
790 suspend_prep_ok = 1;
791 out:
792 return NOTIFY_OK;
793 }
794
pm_suspend_exit_cb(void)795 static int pm_suspend_exit_cb(void)
796 {
797 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
798 static u32 suspend_shlw_ctr_exit, suspend_deep_ctr_exit;
799 static u64 suspend_shlw_res_exit, suspend_deep_res_exit;
800 struct telemetry_debugfs_conf *conf = debugfs_conf;
801 int ret, index;
802
803 if (!suspend_prep_ok)
804 goto out;
805
806 ret = telemetry_raw_read_eventlog(TELEM_IOSS, evtlog,
807 TELEM_MAX_OS_ALLOCATED_EVENTS);
808 if (ret < 0)
809 goto out;
810
811 for (index = 0; index < ret; index++) {
812 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
813 suspend_shlw_ctr_exit);
814
815 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
816 suspend_deep_ctr_exit);
817
818 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
819 suspend_shlw_res_exit);
820
821 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
822 suspend_deep_res_exit);
823 }
824
825 if ((suspend_shlw_ctr_exit < suspend_shlw_ctr_temp) ||
826 (suspend_deep_ctr_exit < suspend_deep_ctr_temp) ||
827 (suspend_shlw_res_exit < suspend_shlw_res_temp) ||
828 (suspend_deep_res_exit < suspend_deep_res_temp)) {
829 pr_err("Wrong s0ix counters detected\n");
830 goto out;
831 }
832
833 /*
834 * Due to some design limitations in the firmware, sometimes the
835 * counters do not get updated by the time we reach here. As a
836 * workaround, we try to see if this was a genuine case of sleep
837 * failure or not by cross-checking from PMC GCR registers directly.
838 */
839 if (suspend_shlw_ctr_exit == suspend_shlw_ctr_temp &&
840 suspend_deep_ctr_exit == suspend_deep_ctr_temp) {
841 struct telemetry_plt_config *plt_config = telemetry_get_pltdata();
842 struct intel_pmc_dev *pmc = plt_config->pmc;
843
844 ret = intel_pmc_gcr_read64(pmc, PMC_GCR_TELEM_SHLW_S0IX_REG,
845 &suspend_shlw_res_exit);
846 if (ret < 0)
847 goto out;
848
849 ret = intel_pmc_gcr_read64(pmc, PMC_GCR_TELEM_DEEP_S0IX_REG,
850 &suspend_deep_res_exit);
851 if (ret < 0)
852 goto out;
853
854 if (suspend_shlw_res_exit > suspend_shlw_res_temp)
855 suspend_shlw_ctr_exit++;
856
857 if (suspend_deep_res_exit > suspend_deep_res_temp)
858 suspend_deep_ctr_exit++;
859 }
860
861 suspend_shlw_ctr_exit -= suspend_shlw_ctr_temp;
862 suspend_deep_ctr_exit -= suspend_deep_ctr_temp;
863 suspend_shlw_res_exit -= suspend_shlw_res_temp;
864 suspend_deep_res_exit -= suspend_deep_res_temp;
865
866 if (suspend_shlw_ctr_exit != 0) {
867 conf->suspend_stats.shlw_ctr +=
868 suspend_shlw_ctr_exit;
869
870 conf->suspend_stats.shlw_res +=
871 suspend_shlw_res_exit;
872 }
873
874 if (suspend_deep_ctr_exit != 0) {
875 conf->suspend_stats.deep_ctr +=
876 suspend_deep_ctr_exit;
877
878 conf->suspend_stats.deep_res +=
879 suspend_deep_res_exit;
880 }
881
882 out:
883 suspend_prep_ok = 0;
884 return NOTIFY_OK;
885 }
886
pm_notification(struct notifier_block * this,unsigned long event,void * ptr)887 static int pm_notification(struct notifier_block *this,
888 unsigned long event, void *ptr)
889 {
890 switch (event) {
891 case PM_SUSPEND_PREPARE:
892 return pm_suspend_prep_cb();
893 case PM_POST_SUSPEND:
894 return pm_suspend_exit_cb();
895 }
896
897 return NOTIFY_DONE;
898 }
899
900 static struct notifier_block pm_notifier = {
901 .notifier_call = pm_notification,
902 };
903
telemetry_debugfs_init(void)904 static int __init telemetry_debugfs_init(void)
905 {
906 const struct x86_cpu_id *id;
907 int err;
908 struct dentry *dir;
909
910 /* Only APL supported for now */
911 id = x86_match_cpu(telemetry_debugfs_cpu_ids);
912 if (!id)
913 return -ENODEV;
914
915 debugfs_conf = (struct telemetry_debugfs_conf *)id->driver_data;
916
917 if (!telemetry_get_pltdata()) {
918 pr_info("Invalid pltconfig, ensure IPC1 device is enabled in BIOS\n");
919 return -ENODEV;
920 }
921
922 err = telemetry_debugfs_check_evts();
923 if (err < 0) {
924 pr_info("telemetry_debugfs_check_evts failed\n");
925 return -EINVAL;
926 }
927
928 register_pm_notifier(&pm_notifier);
929
930 dir = debugfs_create_dir("telemetry", NULL);
931 debugfs_conf->telemetry_dbg_dir = dir;
932
933 debugfs_create_file("pss_info", S_IFREG | S_IRUGO, dir, NULL,
934 &telem_pss_states_fops);
935 debugfs_create_file("ioss_info", S_IFREG | S_IRUGO, dir, NULL,
936 &telem_ioss_states_fops);
937 debugfs_create_file("soc_states", S_IFREG | S_IRUGO, dir, NULL,
938 &telem_soc_states_fops);
939 debugfs_create_file("s0ix_residency_usec", S_IFREG | S_IRUGO, dir, NULL,
940 &telem_s0ix_fops);
941 debugfs_create_file("pss_trace_verbosity", S_IFREG | S_IRUGO, dir, NULL,
942 &telem_pss_trc_verb_ops);
943 debugfs_create_file("ioss_trace_verbosity", S_IFREG | S_IRUGO, dir,
944 NULL, &telem_ioss_trc_verb_ops);
945 return 0;
946 }
947
telemetry_debugfs_exit(void)948 static void __exit telemetry_debugfs_exit(void)
949 {
950 debugfs_remove_recursive(debugfs_conf->telemetry_dbg_dir);
951 debugfs_conf->telemetry_dbg_dir = NULL;
952 unregister_pm_notifier(&pm_notifier);
953 }
954
955 late_initcall(telemetry_debugfs_init);
956 module_exit(telemetry_debugfs_exit);
957
958 MODULE_AUTHOR("Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>");
959 MODULE_DESCRIPTION("Intel SoC Telemetry debugfs Interface");
960 MODULE_VERSION(DRIVER_VERSION);
961 MODULE_LICENSE("GPL v2");
962
