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 static u8 suspend_prep_ok;
101 static u32 suspend_shlw_ctr_temp, suspend_deep_ctr_temp;
102 static u64 suspend_shlw_res_temp, suspend_deep_res_temp;
103
104 struct telemetry_susp_stats {
105 u32 shlw_swake_ctr;
106 u32 deep_swake_ctr;
107 u64 shlw_swake_res;
108 u64 deep_swake_res;
109 u32 shlw_ctr;
110 u32 deep_ctr;
111 u64 shlw_res;
112 u64 deep_res;
113 };
114
115 /* Bitmap definitions for default counters in APL */
116 struct telem_pss_idle_stateinfo {
117 const char *name;
118 u32 bit_pos;
119 };
120
121 static struct telem_pss_idle_stateinfo telem_apl_pss_idle_data[] = {
122 {"IA_CORE0_C1E", 0},
123 {"IA_CORE1_C1E", 1},
124 {"IA_CORE2_C1E", 2},
125 {"IA_CORE3_C1E", 3},
126 {"IA_CORE0_C6", 16},
127 {"IA_CORE1_C6", 17},
128 {"IA_CORE2_C6", 18},
129 {"IA_CORE3_C6", 19},
130 {"IA_MODULE0_C7", 32},
131 {"IA_MODULE1_C7", 33},
132 {"GT_RC6", 40},
133 {"IUNIT_PROCESSING_IDLE", 41},
134 {"FAR_MEM_IDLE", 43},
135 {"DISPLAY_IDLE", 44},
136 {"IUNIT_INPUT_SYSTEM_IDLE", 45},
137 {"PCS_STATUS", 60},
138 };
139
140 struct telem_pcs_blkd_info {
141 const char *name;
142 u32 bit_pos;
143 };
144
145 static struct telem_pcs_blkd_info telem_apl_pcs_idle_blkd_data[] = {
146 {"COMPUTE", 0},
147 {"MISC", 8},
148 {"MODULE_ACTIONS_PENDING", 16},
149 {"LTR", 24},
150 {"DISPLAY_WAKE", 32},
151 {"ISP_WAKE", 40},
152 {"PSF0_ACTIVE", 48},
153 };
154
155 static struct telem_pcs_blkd_info telem_apl_pcs_s0ix_blkd_data[] = {
156 {"LTR", 0},
157 {"IRTL", 8},
158 {"WAKE_DEADLINE_PENDING", 16},
159 {"DISPLAY", 24},
160 {"ISP", 32},
161 {"CORE", 40},
162 {"PMC", 48},
163 {"MISC", 56},
164 };
165
166 struct telem_pss_ltr_info {
167 const char *name;
168 u32 bit_pos;
169 };
170
171 static struct telem_pss_ltr_info telem_apl_pss_ltr_data[] = {
172 {"CORE_ACTIVE", 0},
173 {"MEM_UP", 8},
174 {"DFX", 16},
175 {"DFX_FORCE_LTR", 24},
176 {"DISPLAY", 32},
177 {"ISP", 40},
178 {"SOUTH", 48},
179 };
180
181 struct telem_pss_wakeup_info {
182 const char *name;
183 u32 bit_pos;
184 };
185
186 static struct telem_pss_wakeup_info telem_apl_pss_wakeup[] = {
187 {"IP_IDLE", 0},
188 {"DISPLAY_WAKE", 8},
189 {"VOLTAGE_REG_INT", 16},
190 {"DROWSY_TIMER (HOTPLUG)", 24},
191 {"CORE_WAKE", 32},
192 {"MISC_S0IX", 40},
193 {"MISC_ABORT", 56},
194 };
195
196 struct telem_ioss_d0ix_stateinfo {
197 const char *name;
198 u32 bit_pos;
199 };
200
201 static struct telem_ioss_d0ix_stateinfo telem_apl_ioss_d0ix_data[] = {
202 {"CSE", 0},
203 {"SCC2", 1},
204 {"GMM", 2},
205 {"XDCI", 3},
206 {"XHCI", 4},
207 {"ISH", 5},
208 {"AVS", 6},
209 {"PCIE0P1", 7},
210 {"PECI0P0", 8},
211 {"LPSS", 9},
212 {"SCC", 10},
213 {"PWM", 11},
214 {"PCIE1_P3", 12},
215 {"PCIE1_P2", 13},
216 {"PCIE1_P1", 14},
217 {"PCIE1_P0", 15},
218 {"CNV", 16},
219 {"SATA", 17},
220 {"PRTC", 18},
221 };
222
223 struct telem_ioss_pg_info {
224 const char *name;
225 u32 bit_pos;
226 };
227
228 static struct telem_ioss_pg_info telem_apl_ioss_pg_data[] = {
229 {"LPSS", 0},
230 {"SCC", 1},
231 {"P2SB", 2},
232 {"SCC2", 3},
233 {"GMM", 4},
234 {"PCIE0", 5},
235 {"XDCI", 6},
236 {"xHCI", 7},
237 {"CSE", 8},
238 {"SPI", 9},
239 {"AVSPGD4", 10},
240 {"AVSPGD3", 11},
241 {"AVSPGD2", 12},
242 {"AVSPGD1", 13},
243 {"ISH", 14},
244 {"EXI", 15},
245 {"NPKVRC", 16},
246 {"NPKVNN", 17},
247 {"CUNIT", 18},
248 {"FUSE_CTRL", 19},
249 {"PCIE1", 20},
250 {"CNV", 21},
251 {"LPC", 22},
252 {"SATA", 23},
253 {"SMB", 24},
254 {"PRTC", 25},
255 };
256
257
258 struct telemetry_debugfs_conf {
259 struct telemetry_susp_stats suspend_stats;
260 struct dentry *telemetry_dbg_dir;
261
262 /* Bitmap Data */
263 struct telem_ioss_d0ix_stateinfo *ioss_d0ix_data;
264 struct telem_pss_idle_stateinfo *pss_idle_data;
265 struct telem_pcs_blkd_info *pcs_idle_blkd_data;
266 struct telem_pcs_blkd_info *pcs_s0ix_blkd_data;
267 struct telem_pss_wakeup_info *pss_wakeup;
268 struct telem_pss_ltr_info *pss_ltr_data;
269 struct telem_ioss_pg_info *ioss_pg_data;
270 u8 pcs_idle_blkd_evts;
271 u8 pcs_s0ix_blkd_evts;
272 u8 pss_wakeup_evts;
273 u8 pss_idle_evts;
274 u8 pss_ltr_evts;
275 u8 ioss_d0ix_evts;
276 u8 ioss_pg_evts;
277
278 /* IDs */
279 u16 pss_ltr_blocking_id;
280 u16 pcs_idle_blkd_id;
281 u16 pcs_s0ix_blkd_id;
282 u16 s0ix_total_occ_id;
283 u16 s0ix_shlw_occ_id;
284 u16 s0ix_deep_occ_id;
285 u16 s0ix_total_res_id;
286 u16 s0ix_shlw_res_id;
287 u16 s0ix_deep_res_id;
288 u16 pss_wakeup_id;
289 u16 ioss_d0ix_id;
290 u16 pstates_id;
291 u16 pss_idle_id;
292 u16 ioss_d3_id;
293 u16 ioss_pg_id;
294 };
295
296 static struct telemetry_debugfs_conf *debugfs_conf;
297
298 static struct telemetry_debugfs_conf telem_apl_debugfs_conf = {
299 .pss_idle_data = telem_apl_pss_idle_data,
300 .pcs_idle_blkd_data = telem_apl_pcs_idle_blkd_data,
301 .pcs_s0ix_blkd_data = telem_apl_pcs_s0ix_blkd_data,
302 .pss_ltr_data = telem_apl_pss_ltr_data,
303 .pss_wakeup = telem_apl_pss_wakeup,
304 .ioss_d0ix_data = telem_apl_ioss_d0ix_data,
305 .ioss_pg_data = telem_apl_ioss_pg_data,
306
307 .pss_idle_evts = TELEM_EVT_LEN(telem_apl_pss_idle_data),
308 .pcs_idle_blkd_evts = TELEM_EVT_LEN(telem_apl_pcs_idle_blkd_data),
309 .pcs_s0ix_blkd_evts = TELEM_EVT_LEN(telem_apl_pcs_s0ix_blkd_data),
310 .pss_ltr_evts = TELEM_EVT_LEN(telem_apl_pss_ltr_data),
311 .pss_wakeup_evts = TELEM_EVT_LEN(telem_apl_pss_wakeup),
312 .ioss_d0ix_evts = TELEM_EVT_LEN(telem_apl_ioss_d0ix_data),
313 .ioss_pg_evts = TELEM_EVT_LEN(telem_apl_ioss_pg_data),
314
315 .pstates_id = TELEM_APL_PSS_PSTATES_ID,
316 .pss_idle_id = TELEM_APL_PSS_IDLE_ID,
317 .pcs_idle_blkd_id = TELEM_APL_PCS_IDLE_BLOCKED_ID,
318 .pcs_s0ix_blkd_id = TELEM_APL_PCS_S0IX_BLOCKED_ID,
319 .pss_wakeup_id = TELEM_APL_PSS_WAKEUP_ID,
320 .pss_ltr_blocking_id = TELEM_APL_PSS_LTR_BLOCKING_ID,
321 .s0ix_total_occ_id = TELEM_APL_S0IX_TOTAL_OCC_ID,
322 .s0ix_shlw_occ_id = TELEM_APL_S0IX_SHLW_OCC_ID,
323 .s0ix_deep_occ_id = TELEM_APL_S0IX_DEEP_OCC_ID,
324 .s0ix_total_res_id = TELEM_APL_S0IX_TOTAL_RES_ID,
325 .s0ix_shlw_res_id = TELEM_APL_S0IX_SHLW_RES_ID,
326 .s0ix_deep_res_id = TELEM_APL_S0IX_DEEP_RES_ID,
327 .ioss_d0ix_id = TELEM_APL_D0IX_ID,
328 .ioss_d3_id = TELEM_APL_D3_ID,
329 .ioss_pg_id = TELEM_APL_PG_ID,
330 };
331
332 static const struct x86_cpu_id telemetry_debugfs_cpu_ids[] = {
333 TELEM_DEBUGFS_CPU(INTEL_FAM6_ATOM_GOLDMONT, telem_apl_debugfs_conf),
334 TELEM_DEBUGFS_CPU(INTEL_FAM6_ATOM_GOLDMONT_PLUS, telem_apl_debugfs_conf),
335 {}
336 };
337
338 MODULE_DEVICE_TABLE(x86cpu, telemetry_debugfs_cpu_ids);
339
telemetry_debugfs_check_evts(void)340 static int telemetry_debugfs_check_evts(void)
341 {
342 if ((debugfs_conf->pss_idle_evts > TELEM_PSS_IDLE_EVTS) ||
343 (debugfs_conf->pcs_idle_blkd_evts > TELEM_PSS_IDLE_BLOCKED_EVTS) ||
344 (debugfs_conf->pcs_s0ix_blkd_evts > TELEM_PSS_S0IX_BLOCKED_EVTS) ||
345 (debugfs_conf->pss_ltr_evts > TELEM_PSS_LTR_BLOCKING_EVTS) ||
346 (debugfs_conf->pss_wakeup_evts > TELEM_PSS_S0IX_WAKEUP_EVTS) ||
347 (debugfs_conf->ioss_d0ix_evts > TELEM_IOSS_DX_D0IX_EVTS) ||
348 (debugfs_conf->ioss_pg_evts > TELEM_IOSS_PG_EVTS))
349 return -EINVAL;
350
351 return 0;
352 }
353
telem_pss_states_show(struct seq_file * s,void * unused)354 static int telem_pss_states_show(struct seq_file *s, void *unused)
355 {
356 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
357 struct telemetry_debugfs_conf *conf = debugfs_conf;
358 const char *name[TELEM_MAX_OS_ALLOCATED_EVENTS];
359 u32 pcs_idle_blkd[TELEM_PSS_IDLE_BLOCKED_EVTS],
360 pcs_s0ix_blkd[TELEM_PSS_S0IX_BLOCKED_EVTS],
361 pss_s0ix_wakeup[TELEM_PSS_S0IX_WAKEUP_EVTS],
362 pss_ltr_blkd[TELEM_PSS_LTR_BLOCKING_EVTS],
363 pss_idle[TELEM_PSS_IDLE_EVTS];
364 int index, idx, ret, err = 0;
365 u64 pstates = 0;
366
367 ret = telemetry_read_eventlog(TELEM_PSS, evtlog,
368 TELEM_MAX_OS_ALLOCATED_EVENTS);
369 if (ret < 0)
370 return ret;
371
372 err = telemetry_get_evtname(TELEM_PSS, name,
373 TELEM_MAX_OS_ALLOCATED_EVENTS);
374 if (err < 0)
375 return err;
376
377 seq_puts(s, "\n----------------------------------------------------\n");
378 seq_puts(s, "\tPSS TELEM EVENTLOG (Residency = field/19.2 us\n");
379 seq_puts(s, "----------------------------------------------------\n");
380 for (index = 0; index < ret; index++) {
381 seq_printf(s, "%-32s %llu\n",
382 name[index], evtlog[index].telem_evtlog);
383
384 /* Fetch PSS IDLE State */
385 if (evtlog[index].telem_evtid == conf->pss_idle_id) {
386 pss_idle[conf->pss_idle_evts - 1] =
387 (evtlog[index].telem_evtlog >>
388 conf->pss_idle_data[conf->pss_idle_evts - 1].bit_pos) &
389 TELEM_APL_MASK_PCS_STATE;
390 }
391
392
393 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_idle_id,
394 conf->pss_idle_evts - 1,
395 pss_idle, evtlog[index].telem_evtlog,
396 conf->pss_idle_data, TELEM_MASK_BIT);
397
398 TELEM_CHECK_AND_PARSE_EVTS(conf->pcs_idle_blkd_id,
399 conf->pcs_idle_blkd_evts,
400 pcs_idle_blkd,
401 evtlog[index].telem_evtlog,
402 conf->pcs_idle_blkd_data,
403 TELEM_MASK_BYTE);
404
405 TELEM_CHECK_AND_PARSE_EVTS(conf->pcs_s0ix_blkd_id,
406 conf->pcs_s0ix_blkd_evts,
407 pcs_s0ix_blkd,
408 evtlog[index].telem_evtlog,
409 conf->pcs_s0ix_blkd_data,
410 TELEM_MASK_BYTE);
411
412
413 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_wakeup_id,
414 conf->pss_wakeup_evts,
415 pss_s0ix_wakeup,
416 evtlog[index].telem_evtlog,
417 conf->pss_wakeup, TELEM_MASK_BYTE);
418
419 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_ltr_blocking_id,
420 conf->pss_ltr_evts, pss_ltr_blkd,
421 evtlog[index].telem_evtlog,
422 conf->pss_ltr_data, TELEM_MASK_BYTE);
423
424 if (evtlog[index].telem_evtid == debugfs_conf->pstates_id)
425 pstates = evtlog[index].telem_evtlog;
426 }
427
428 seq_puts(s, "\n--------------------------------------\n");
429 seq_puts(s, "PStates\n");
430 seq_puts(s, "--------------------------------------\n");
431 seq_puts(s, "Domain\t\t\t\tFreq(Mhz)\n");
432 seq_printf(s, " IA\t\t\t\t %llu\n GT\t\t\t\t %llu\n",
433 (pstates & TELEM_MASK_BYTE)*100,
434 ((pstates >> 8) & TELEM_MASK_BYTE)*50/3);
435
436 seq_printf(s, " IUNIT\t\t\t\t %llu\n SA\t\t\t\t %llu\n",
437 ((pstates >> 16) & TELEM_MASK_BYTE)*25,
438 ((pstates >> 24) & TELEM_MASK_BYTE)*50/3);
439
440 seq_puts(s, "\n--------------------------------------\n");
441 seq_puts(s, "PSS IDLE Status\n");
442 seq_puts(s, "--------------------------------------\n");
443 seq_puts(s, "Device\t\t\t\t\tIDLE\n");
444 for (index = 0; index < debugfs_conf->pss_idle_evts; index++) {
445 seq_printf(s, "%-32s\t%u\n",
446 debugfs_conf->pss_idle_data[index].name,
447 pss_idle[index]);
448 }
449
450 seq_puts(s, "\n--------------------------------------\n");
451 seq_puts(s, "PSS Idle blkd Status (~1ms saturating bucket)\n");
452 seq_puts(s, "--------------------------------------\n");
453 seq_puts(s, "Blocker\t\t\t\t\tCount\n");
454 for (index = 0; index < debugfs_conf->pcs_idle_blkd_evts; index++) {
455 seq_printf(s, "%-32s\t%u\n",
456 debugfs_conf->pcs_idle_blkd_data[index].name,
457 pcs_idle_blkd[index]);
458 }
459
460 seq_puts(s, "\n--------------------------------------\n");
461 seq_puts(s, "PSS S0ix blkd Status (~1ms saturating bucket)\n");
462 seq_puts(s, "--------------------------------------\n");
463 seq_puts(s, "Blocker\t\t\t\t\tCount\n");
464 for (index = 0; index < debugfs_conf->pcs_s0ix_blkd_evts; index++) {
465 seq_printf(s, "%-32s\t%u\n",
466 debugfs_conf->pcs_s0ix_blkd_data[index].name,
467 pcs_s0ix_blkd[index]);
468 }
469
470 seq_puts(s, "\n--------------------------------------\n");
471 seq_puts(s, "LTR Blocking Status (~1ms saturating bucket)\n");
472 seq_puts(s, "--------------------------------------\n");
473 seq_puts(s, "Blocker\t\t\t\t\tCount\n");
474 for (index = 0; index < debugfs_conf->pss_ltr_evts; index++) {
475 seq_printf(s, "%-32s\t%u\n",
476 debugfs_conf->pss_ltr_data[index].name,
477 pss_s0ix_wakeup[index]);
478 }
479
480 seq_puts(s, "\n--------------------------------------\n");
481 seq_puts(s, "Wakes Status (~1ms saturating bucket)\n");
482 seq_puts(s, "--------------------------------------\n");
483 seq_puts(s, "Wakes\t\t\t\t\tCount\n");
484 for (index = 0; index < debugfs_conf->pss_wakeup_evts; index++) {
485 seq_printf(s, "%-32s\t%u\n",
486 debugfs_conf->pss_wakeup[index].name,
487 pss_ltr_blkd[index]);
488 }
489
490 return 0;
491 }
492
telem_pss_state_open(struct inode * inode,struct file * file)493 static int telem_pss_state_open(struct inode *inode, struct file *file)
494 {
495 return single_open(file, telem_pss_states_show, inode->i_private);
496 }
497
498 static const struct file_operations telem_pss_ops = {
499 .open = telem_pss_state_open,
500 .read = seq_read,
501 .llseek = seq_lseek,
502 .release = single_release,
503 };
504
505
telem_ioss_states_show(struct seq_file * s,void * unused)506 static int telem_ioss_states_show(struct seq_file *s, void *unused)
507 {
508 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
509 const char *name[TELEM_MAX_OS_ALLOCATED_EVENTS];
510 int index, ret, err;
511
512 ret = telemetry_read_eventlog(TELEM_IOSS, evtlog,
513 TELEM_MAX_OS_ALLOCATED_EVENTS);
514 if (ret < 0)
515 return ret;
516
517 err = telemetry_get_evtname(TELEM_IOSS, name,
518 TELEM_MAX_OS_ALLOCATED_EVENTS);
519 if (err < 0)
520 return err;
521
522 seq_puts(s, "--------------------------------------\n");
523 seq_puts(s, "\tI0SS TELEMETRY EVENTLOG\n");
524 seq_puts(s, "--------------------------------------\n");
525 for (index = 0; index < ret; index++) {
526 seq_printf(s, "%-32s 0x%llx\n",
527 name[index], evtlog[index].telem_evtlog);
528 }
529
530 return 0;
531 }
532
telem_ioss_state_open(struct inode * inode,struct file * file)533 static int telem_ioss_state_open(struct inode *inode, struct file *file)
534 {
535 return single_open(file, telem_ioss_states_show, inode->i_private);
536 }
537
538 static const struct file_operations telem_ioss_ops = {
539 .open = telem_ioss_state_open,
540 .read = seq_read,
541 .llseek = seq_lseek,
542 .release = single_release,
543 };
544
telem_soc_states_show(struct seq_file * s,void * unused)545 static int telem_soc_states_show(struct seq_file *s, void *unused)
546 {
547 u32 d3_sts[TELEM_IOSS_DX_D0IX_EVTS], d0ix_sts[TELEM_IOSS_DX_D0IX_EVTS];
548 u32 pg_sts[TELEM_IOSS_PG_EVTS], pss_idle[TELEM_PSS_IDLE_EVTS];
549 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
550 u32 s0ix_total_ctr = 0, s0ix_shlw_ctr = 0, s0ix_deep_ctr = 0;
551 u64 s0ix_total_res = 0, s0ix_shlw_res = 0, s0ix_deep_res = 0;
552 struct telemetry_debugfs_conf *conf = debugfs_conf;
553 struct pci_dev *dev = NULL;
554 int index, idx, ret;
555 u32 d3_state;
556 u16 pmcsr;
557
558 ret = telemetry_read_eventlog(TELEM_IOSS, evtlog,
559 TELEM_MAX_OS_ALLOCATED_EVENTS);
560 if (ret < 0)
561 return ret;
562
563 for (index = 0; index < ret; index++) {
564 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_d3_id,
565 conf->ioss_d0ix_evts,
566 d3_sts, evtlog[index].telem_evtlog,
567 conf->ioss_d0ix_data,
568 TELEM_MASK_BIT);
569
570 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_pg_id, conf->ioss_pg_evts,
571 pg_sts, evtlog[index].telem_evtlog,
572 conf->ioss_pg_data, TELEM_MASK_BIT);
573
574 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_d0ix_id,
575 conf->ioss_d0ix_evts,
576 d0ix_sts, evtlog[index].telem_evtlog,
577 conf->ioss_d0ix_data,
578 TELEM_MASK_BIT);
579
580 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_total_occ_id,
581 s0ix_total_ctr);
582
583 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
584 s0ix_shlw_ctr);
585
586 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
587 s0ix_deep_ctr);
588
589 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_total_res_id,
590 s0ix_total_res);
591
592 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
593 s0ix_shlw_res);
594
595 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
596 s0ix_deep_res);
597 }
598
599 seq_puts(s, "\n---------------------------------------------------\n");
600 seq_puts(s, "S0IX Type\t\t\t Occurrence\t\t Residency(us)\n");
601 seq_puts(s, "---------------------------------------------------\n");
602
603 seq_printf(s, "S0IX Shallow\t\t\t %10u\t %10llu\n",
604 s0ix_shlw_ctr -
605 conf->suspend_stats.shlw_ctr -
606 conf->suspend_stats.shlw_swake_ctr,
607 (u64)((s0ix_shlw_res -
608 conf->suspend_stats.shlw_res -
609 conf->suspend_stats.shlw_swake_res)*10/192));
610
611 seq_printf(s, "S0IX Deep\t\t\t %10u\t %10llu\n",
612 s0ix_deep_ctr -
613 conf->suspend_stats.deep_ctr -
614 conf->suspend_stats.deep_swake_ctr,
615 (u64)((s0ix_deep_res -
616 conf->suspend_stats.deep_res -
617 conf->suspend_stats.deep_swake_res)*10/192));
618
619 seq_printf(s, "Suspend(With S0ixShallow)\t %10u\t %10llu\n",
620 conf->suspend_stats.shlw_ctr,
621 (u64)(conf->suspend_stats.shlw_res*10)/192);
622
623 seq_printf(s, "Suspend(With S0ixDeep)\t\t %10u\t %10llu\n",
624 conf->suspend_stats.deep_ctr,
625 (u64)(conf->suspend_stats.deep_res*10)/192);
626
627 seq_printf(s, "Suspend(With Shallow-Wakes)\t %10u\t %10llu\n",
628 conf->suspend_stats.shlw_swake_ctr +
629 conf->suspend_stats.deep_swake_ctr,
630 (u64)((conf->suspend_stats.shlw_swake_res +
631 conf->suspend_stats.deep_swake_res)*10/192));
632
633 seq_printf(s, "S0IX+Suspend Total\t\t %10u\t %10llu\n", s0ix_total_ctr,
634 (u64)(s0ix_total_res*10/192));
635 seq_puts(s, "\n-------------------------------------------------\n");
636 seq_puts(s, "\t\tDEVICE STATES\n");
637 seq_puts(s, "-------------------------------------------------\n");
638
639 for_each_pci_dev(dev) {
640 pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr);
641 d3_state = ((pmcsr & PCI_PM_CTRL_STATE_MASK) ==
642 (__force int)PCI_D3hot) ? 1 : 0;
643
644 seq_printf(s, "pci %04x %04X %s %20.20s: ",
645 dev->vendor, dev->device, dev_name(&dev->dev),
646 dev_driver_string(&dev->dev));
647 seq_printf(s, " d3:%x\n", d3_state);
648 }
649
650 seq_puts(s, "\n--------------------------------------\n");
651 seq_puts(s, "D3/D0i3 Status\n");
652 seq_puts(s, "--------------------------------------\n");
653 seq_puts(s, "Block\t\t D3\t D0i3\n");
654 for (index = 0; index < conf->ioss_d0ix_evts; index++) {
655 seq_printf(s, "%-10s\t %u\t %u\n",
656 conf->ioss_d0ix_data[index].name,
657 d3_sts[index], d0ix_sts[index]);
658 }
659
660 seq_puts(s, "\n--------------------------------------\n");
661 seq_puts(s, "South Complex PowerGate Status\n");
662 seq_puts(s, "--------------------------------------\n");
663 seq_puts(s, "Device\t\t PG\n");
664 for (index = 0; index < conf->ioss_pg_evts; index++) {
665 seq_printf(s, "%-10s\t %u\n",
666 conf->ioss_pg_data[index].name,
667 pg_sts[index]);
668 }
669
670 evtlog->telem_evtid = conf->pss_idle_id;
671 ret = telemetry_read_events(TELEM_PSS, evtlog, 1);
672 if (ret < 0)
673 return ret;
674
675 seq_puts(s, "\n-----------------------------------------\n");
676 seq_puts(s, "North Idle Status\n");
677 seq_puts(s, "-----------------------------------------\n");
678 for (idx = 0; idx < conf->pss_idle_evts - 1; idx++) {
679 pss_idle[idx] = (evtlog->telem_evtlog >>
680 conf->pss_idle_data[idx].bit_pos) &
681 TELEM_MASK_BIT;
682 }
683
684 pss_idle[idx] = (evtlog->telem_evtlog >>
685 conf->pss_idle_data[idx].bit_pos) &
686 TELEM_APL_MASK_PCS_STATE;
687
688 for (index = 0; index < conf->pss_idle_evts; index++) {
689 seq_printf(s, "%-30s %u\n",
690 conf->pss_idle_data[index].name,
691 pss_idle[index]);
692 }
693
694 seq_puts(s, "\nPCS_STATUS Code\n");
695 seq_puts(s, "0:C0 1:C1 2:C1_DN_WT_DEV 3:C2 4:C2_WT_DE_MEM_UP\n");
696 seq_puts(s, "5:C2_WT_DE_MEM_DOWN 6:C2_UP_WT_DEV 7:C2_DN 8:C2_VOA\n");
697 seq_puts(s, "9:C2_VOA_UP 10:S0IX_PRE 11:S0IX\n");
698
699 return 0;
700 }
701
telem_soc_state_open(struct inode * inode,struct file * file)702 static int telem_soc_state_open(struct inode *inode, struct file *file)
703 {
704 return single_open(file, telem_soc_states_show, inode->i_private);
705 }
706
707 static const struct file_operations telem_socstate_ops = {
708 .open = telem_soc_state_open,
709 .read = seq_read,
710 .llseek = seq_lseek,
711 .release = single_release,
712 };
713
telem_s0ix_res_get(void * data,u64 * val)714 static int telem_s0ix_res_get(void *data, u64 *val)
715 {
716 u64 s0ix_total_res;
717 int ret;
718
719 ret = intel_pmc_s0ix_counter_read(&s0ix_total_res);
720 if (ret) {
721 pr_err("Failed to read S0ix residency");
722 return ret;
723 }
724
725 *val = s0ix_total_res;
726
727 return 0;
728 }
729
730 DEFINE_DEBUGFS_ATTRIBUTE(telem_s0ix_fops, telem_s0ix_res_get, NULL, "%llu\n");
731
telem_pss_trc_verb_show(struct seq_file * s,void * unused)732 static int telem_pss_trc_verb_show(struct seq_file *s, void *unused)
733 {
734 u32 verbosity;
735 int err;
736
737 err = telemetry_get_trace_verbosity(TELEM_PSS, &verbosity);
738 if (err) {
739 pr_err("Get PSS Trace Verbosity Failed with Error %d\n", err);
740 return -EFAULT;
741 }
742
743 seq_printf(s, "PSS Trace Verbosity %u\n", verbosity);
744 return 0;
745 }
746
telem_pss_trc_verb_write(struct file * file,const char __user * userbuf,size_t count,loff_t * ppos)747 static ssize_t telem_pss_trc_verb_write(struct file *file,
748 const char __user *userbuf,
749 size_t count, loff_t *ppos)
750 {
751 u32 verbosity;
752 int err;
753
754 if (kstrtou32_from_user(userbuf, count, 0, &verbosity))
755 return -EFAULT;
756
757 err = telemetry_set_trace_verbosity(TELEM_PSS, verbosity);
758 if (err) {
759 pr_err("Changing PSS Trace Verbosity Failed. Error %d\n", err);
760 count = err;
761 }
762
763 return count;
764 }
765
telem_pss_trc_verb_open(struct inode * inode,struct file * file)766 static int telem_pss_trc_verb_open(struct inode *inode, struct file *file)
767 {
768 return single_open(file, telem_pss_trc_verb_show, inode->i_private);
769 }
770
771 static const struct file_operations telem_pss_trc_verb_ops = {
772 .open = telem_pss_trc_verb_open,
773 .read = seq_read,
774 .write = telem_pss_trc_verb_write,
775 .llseek = seq_lseek,
776 .release = single_release,
777 };
778
779
telem_ioss_trc_verb_show(struct seq_file * s,void * unused)780 static int telem_ioss_trc_verb_show(struct seq_file *s, void *unused)
781 {
782 u32 verbosity;
783 int err;
784
785 err = telemetry_get_trace_verbosity(TELEM_IOSS, &verbosity);
786 if (err) {
787 pr_err("Get IOSS Trace Verbosity Failed with Error %d\n", err);
788 return -EFAULT;
789 }
790
791 seq_printf(s, "IOSS Trace Verbosity %u\n", verbosity);
792 return 0;
793 }
794
telem_ioss_trc_verb_write(struct file * file,const char __user * userbuf,size_t count,loff_t * ppos)795 static ssize_t telem_ioss_trc_verb_write(struct file *file,
796 const char __user *userbuf,
797 size_t count, loff_t *ppos)
798 {
799 u32 verbosity;
800 int err;
801
802 if (kstrtou32_from_user(userbuf, count, 0, &verbosity))
803 return -EFAULT;
804
805 err = telemetry_set_trace_verbosity(TELEM_IOSS, verbosity);
806 if (err) {
807 pr_err("Changing IOSS Trace Verbosity Failed. Error %d\n", err);
808 count = err;
809 }
810
811 return count;
812 }
813
telem_ioss_trc_verb_open(struct inode * inode,struct file * file)814 static int telem_ioss_trc_verb_open(struct inode *inode, struct file *file)
815 {
816 return single_open(file, telem_ioss_trc_verb_show, inode->i_private);
817 }
818
819 static const struct file_operations telem_ioss_trc_verb_ops = {
820 .open = telem_ioss_trc_verb_open,
821 .read = seq_read,
822 .write = telem_ioss_trc_verb_write,
823 .llseek = seq_lseek,
824 .release = single_release,
825 };
826
pm_suspend_prep_cb(void)827 static int pm_suspend_prep_cb(void)
828 {
829 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
830 struct telemetry_debugfs_conf *conf = debugfs_conf;
831 int ret, index;
832
833 ret = telemetry_raw_read_eventlog(TELEM_IOSS, evtlog,
834 TELEM_MAX_OS_ALLOCATED_EVENTS);
835 if (ret < 0) {
836 suspend_prep_ok = 0;
837 goto out;
838 }
839
840 for (index = 0; index < ret; index++) {
841
842 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
843 suspend_shlw_ctr_temp);
844
845 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
846 suspend_deep_ctr_temp);
847
848 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
849 suspend_shlw_res_temp);
850
851 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
852 suspend_deep_res_temp);
853 }
854 suspend_prep_ok = 1;
855 out:
856 return NOTIFY_OK;
857 }
858
pm_suspend_exit_cb(void)859 static int pm_suspend_exit_cb(void)
860 {
861 struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
862 static u32 suspend_shlw_ctr_exit, suspend_deep_ctr_exit;
863 static u64 suspend_shlw_res_exit, suspend_deep_res_exit;
864 struct telemetry_debugfs_conf *conf = debugfs_conf;
865 int ret, index;
866
867 if (!suspend_prep_ok)
868 goto out;
869
870 ret = telemetry_raw_read_eventlog(TELEM_IOSS, evtlog,
871 TELEM_MAX_OS_ALLOCATED_EVENTS);
872 if (ret < 0)
873 goto out;
874
875 for (index = 0; index < ret; index++) {
876 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
877 suspend_shlw_ctr_exit);
878
879 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
880 suspend_deep_ctr_exit);
881
882 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
883 suspend_shlw_res_exit);
884
885 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
886 suspend_deep_res_exit);
887 }
888
889 if ((suspend_shlw_ctr_exit < suspend_shlw_ctr_temp) ||
890 (suspend_deep_ctr_exit < suspend_deep_ctr_temp) ||
891 (suspend_shlw_res_exit < suspend_shlw_res_temp) ||
892 (suspend_deep_res_exit < suspend_deep_res_temp)) {
893 pr_err("Wrong s0ix counters detected\n");
894 goto out;
895 }
896
897 suspend_shlw_ctr_exit -= suspend_shlw_ctr_temp;
898 suspend_deep_ctr_exit -= suspend_deep_ctr_temp;
899 suspend_shlw_res_exit -= suspend_shlw_res_temp;
900 suspend_deep_res_exit -= suspend_deep_res_temp;
901
902 if (suspend_shlw_ctr_exit == 1) {
903 conf->suspend_stats.shlw_ctr +=
904 suspend_shlw_ctr_exit;
905
906 conf->suspend_stats.shlw_res +=
907 suspend_shlw_res_exit;
908 }
909 /* Shallow Wakes Case */
910 else if (suspend_shlw_ctr_exit > 1) {
911 conf->suspend_stats.shlw_swake_ctr +=
912 suspend_shlw_ctr_exit;
913
914 conf->suspend_stats.shlw_swake_res +=
915 suspend_shlw_res_exit;
916 }
917
918 if (suspend_deep_ctr_exit == 1) {
919 conf->suspend_stats.deep_ctr +=
920 suspend_deep_ctr_exit;
921
922 conf->suspend_stats.deep_res +=
923 suspend_deep_res_exit;
924 }
925
926 /* Shallow Wakes Case */
927 else if (suspend_deep_ctr_exit > 1) {
928 conf->suspend_stats.deep_swake_ctr +=
929 suspend_deep_ctr_exit;
930
931 conf->suspend_stats.deep_swake_res +=
932 suspend_deep_res_exit;
933 }
934
935 out:
936 suspend_prep_ok = 0;
937 return NOTIFY_OK;
938 }
939
pm_notification(struct notifier_block * this,unsigned long event,void * ptr)940 static int pm_notification(struct notifier_block *this,
941 unsigned long event, void *ptr)
942 {
943 switch (event) {
944 case PM_SUSPEND_PREPARE:
945 return pm_suspend_prep_cb();
946 case PM_POST_SUSPEND:
947 return pm_suspend_exit_cb();
948 }
949
950 return NOTIFY_DONE;
951 }
952
953 static struct notifier_block pm_notifier = {
954 .notifier_call = pm_notification,
955 };
956
telemetry_debugfs_init(void)957 static int __init telemetry_debugfs_init(void)
958 {
959 const struct x86_cpu_id *id;
960 int err;
961 struct dentry *f;
962
963 /* Only APL supported for now */
964 id = x86_match_cpu(telemetry_debugfs_cpu_ids);
965 if (!id)
966 return -ENODEV;
967
968 debugfs_conf = (struct telemetry_debugfs_conf *)id->driver_data;
969
970 err = telemetry_pltconfig_valid();
971 if (err < 0) {
972 pr_info("Invalid pltconfig, ensure IPC1 device is enabled in BIOS\n");
973 return -ENODEV;
974 }
975
976 err = telemetry_debugfs_check_evts();
977 if (err < 0) {
978 pr_info("telemetry_debugfs_check_evts failed\n");
979 return -EINVAL;
980 }
981
982 register_pm_notifier(&pm_notifier);
983
984 err = -ENOMEM;
985 debugfs_conf->telemetry_dbg_dir = debugfs_create_dir("telemetry", NULL);
986 if (!debugfs_conf->telemetry_dbg_dir)
987 goto out_pm;
988
989 f = debugfs_create_file("pss_info", S_IFREG | S_IRUGO,
990 debugfs_conf->telemetry_dbg_dir, NULL,
991 &telem_pss_ops);
992 if (!f) {
993 pr_err("pss_sample_info debugfs register failed\n");
994 goto out;
995 }
996
997 f = debugfs_create_file("ioss_info", S_IFREG | S_IRUGO,
998 debugfs_conf->telemetry_dbg_dir, NULL,
999 &telem_ioss_ops);
1000 if (!f) {
1001 pr_err("ioss_sample_info debugfs register failed\n");
1002 goto out;
1003 }
1004
1005 f = debugfs_create_file("soc_states", S_IFREG | S_IRUGO,
1006 debugfs_conf->telemetry_dbg_dir,
1007 NULL, &telem_socstate_ops);
1008 if (!f) {
1009 pr_err("ioss_sample_info debugfs register failed\n");
1010 goto out;
1011 }
1012
1013 f = debugfs_create_file("s0ix_residency_usec", S_IFREG | S_IRUGO,
1014 debugfs_conf->telemetry_dbg_dir,
1015 NULL, &telem_s0ix_fops);
1016 if (!f) {
1017 pr_err("s0ix_residency_usec debugfs register failed\n");
1018 goto out;
1019 }
1020
1021 f = debugfs_create_file("pss_trace_verbosity", S_IFREG | S_IRUGO,
1022 debugfs_conf->telemetry_dbg_dir, NULL,
1023 &telem_pss_trc_verb_ops);
1024 if (!f) {
1025 pr_err("pss_trace_verbosity debugfs register failed\n");
1026 goto out;
1027 }
1028
1029 f = debugfs_create_file("ioss_trace_verbosity", S_IFREG | S_IRUGO,
1030 debugfs_conf->telemetry_dbg_dir, NULL,
1031 &telem_ioss_trc_verb_ops);
1032 if (!f) {
1033 pr_err("ioss_trace_verbosity debugfs register failed\n");
1034 goto out;
1035 }
1036
1037 return 0;
1038
1039 out:
1040 debugfs_remove_recursive(debugfs_conf->telemetry_dbg_dir);
1041 debugfs_conf->telemetry_dbg_dir = NULL;
1042 out_pm:
1043 unregister_pm_notifier(&pm_notifier);
1044
1045 return err;
1046 }
1047
telemetry_debugfs_exit(void)1048 static void __exit telemetry_debugfs_exit(void)
1049 {
1050 debugfs_remove_recursive(debugfs_conf->telemetry_dbg_dir);
1051 debugfs_conf->telemetry_dbg_dir = NULL;
1052 unregister_pm_notifier(&pm_notifier);
1053 }
1054
1055 late_initcall(telemetry_debugfs_init);
1056 module_exit(telemetry_debugfs_exit);
1057
1058 MODULE_AUTHOR("Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>");
1059 MODULE_DESCRIPTION("Intel SoC Telemetry debugfs Interface");
1060 MODULE_VERSION(DRIVER_VERSION);
1061 MODULE_LICENSE("GPL");
1062