drivers/platform/x86/intel_telemetry_debugfs.c

   1 /*
   2  * Intel SOC Telemetry debugfs Driver: Currently supports APL
   3  * Copyright (c) 2015, Intel Corporation.
   4  * All Rights Reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * This file provides the debugfs interfaces for telemetry.
  16  * /sys/kernel/debug/telemetry/pss_info: Shows Primary Control Sub-Sys Counters
  17  * /sys/kernel/debug/telemetry/ioss_info: Shows IO Sub-System Counters
  18  * /sys/kernel/debug/telemetry/soc_states: Shows SoC State
  19  * /sys/kernel/debug/telemetry/pss_trace_verbosity: Read and Change Tracing
  20  *                              Verbosity via firmware
  21  * /sys/kernel/debug/telemetry/ioss_race_verbosity: Write and Change Tracing
  22  *                              Verbosity via firmware
  23  */
  24 #include <linux/module.h>
  25 #include <linux/init.h>
  26 #include <linux/device.h>
  27 #include <linux/debugfs.h>
  28 #include <linux/seq_file.h>
  29 #include <linux/io.h>
  30 #include <linux/uaccess.h>
  31 #include <linux/pci.h>
  32 #include <linux/suspend.h>
  33
  34 #include <asm/cpu_device_id.h>
  35 #include <asm/intel-family.h>
  36 #include <asm/intel_pmc_ipc.h>
  37 #include <asm/intel_punit_ipc.h>
  38 #include <asm/intel_telemetry.h>
  39
  40 #define DRIVER_NAME     "telemetry_soc_debugfs"
  41 #define DRIVER_VERSION  "1.0.0"
  42
  43 /* ApolloLake SoC Event-IDs */
  44 #define TELEM_APL_PSS_PSTATES_ID        0x2802
  45 #define TELEM_APL_PSS_IDLE_ID           0x2806
  46 #define TELEM_APL_PCS_IDLE_BLOCKED_ID   0x2C00
  47 #define TELEM_APL_PCS_S0IX_BLOCKED_ID   0x2C01
  48 #define TELEM_APL_PSS_WAKEUP_ID         0x2C02
  49 #define TELEM_APL_PSS_LTR_BLOCKING_ID   0x2C03
  50
  51 #define TELEM_APL_S0IX_TOTAL_OCC_ID     0x4000
  52 #define TELEM_APL_S0IX_SHLW_OCC_ID      0x4001
  53 #define TELEM_APL_S0IX_DEEP_OCC_ID      0x4002
  54 #define TELEM_APL_S0IX_TOTAL_RES_ID     0x4800
  55 #define TELEM_APL_S0IX_SHLW_RES_ID      0x4801
  56 #define TELEM_APL_S0IX_DEEP_RES_ID      0x4802
  57 #define TELEM_APL_D0IX_ID               0x581A
  58 #define TELEM_APL_D3_ID                 0x5819
  59 #define TELEM_APL_PG_ID                 0x5818
  60
  61 #define TELEM_INFO_SRAMEVTS_MASK        0xFF00
  62 #define TELEM_INFO_SRAMEVTS_SHIFT       0x8
  63 #define TELEM_SSRAM_READ_TIMEOUT        10
  64
  65 #define TELEM_MASK_BIT                  1
  66 #define TELEM_MASK_BYTE                 0xFF
  67 #define BYTES_PER_LONG                  8
  68 #define TELEM_APL_MASK_PCS_STATE        0xF
  69
  70 /* Max events in bitmap to check for */
  71 #define TELEM_PSS_IDLE_EVTS             25
  72 #define TELEM_PSS_IDLE_BLOCKED_EVTS     20
  73 #define TELEM_PSS_S0IX_BLOCKED_EVTS     20
  74 #define TELEM_PSS_S0IX_WAKEUP_EVTS      20
  75 #define TELEM_PSS_LTR_BLOCKING_EVTS     20
  76 #define TELEM_IOSS_DX_D0IX_EVTS         25
  77 #define TELEM_IOSS_PG_EVTS              30
  78
  79 #define TELEM_EVT_LEN(x) (sizeof(x)/sizeof((x)[0]))
  80
  81 #define TELEM_DEBUGFS_CPU(model, data) \
  82         { X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, (unsigned long)&data}
  83
  84 #define TELEM_CHECK_AND_PARSE_EVTS(EVTID, EVTNUM, BUF, EVTLOG, EVTDAT, MASK) { \
  85         if (evtlog[index].telem_evtid == (EVTID)) { \
  86                 for (idx = 0; idx < (EVTNUM); idx++) \
  87                         (BUF)[idx] = ((EVTLOG) >> (EVTDAT)[idx].bit_pos) & \
  88                                      (MASK); \
  89         continue; \
  90         } \
  91 }
  92
  93 #define TELEM_CHECK_AND_PARSE_CTRS(EVTID, CTR) { \
  94         if (evtlog[index].telem_evtid == (EVTID)) { \
  95                 (CTR) = evtlog[index].telem_evtlog; \
  96                 continue; \
  97         } \
  98 }
  99
 100 #ifdef CONFIG_PM_SLEEP
 101 static u8 suspend_prep_ok;
 102 static u32 suspend_shlw_ctr_temp, suspend_deep_ctr_temp;
 103 static u64 suspend_shlw_res_temp, suspend_deep_res_temp;
 104 #endif
 105
 106 struct telemetry_susp_stats {
 107         u32 shlw_swake_ctr;
 108         u32 deep_swake_ctr;
 109         u64 shlw_swake_res;
 110         u64 deep_swake_res;
 111         u32 shlw_ctr;
 112         u32 deep_ctr;
 113         u64 shlw_res;
 114         u64 deep_res;
 115 };
 116
 117 /* Bitmap definitions for default counters in APL */
 118 struct telem_pss_idle_stateinfo {
 119         const char *name;
 120         u32 bit_pos;
 121 };
 122
 123 static struct telem_pss_idle_stateinfo telem_apl_pss_idle_data[] = {
 124         {"IA_CORE0_C1E",                0},
 125         {"IA_CORE1_C1E",                1},
 126         {"IA_CORE2_C1E",                2},
 127         {"IA_CORE3_C1E",                3},
 128         {"IA_CORE0_C6",                 16},
 129         {"IA_CORE1_C6",                 17},
 130         {"IA_CORE2_C6",                 18},
 131         {"IA_CORE3_C6",                 19},
 132         {"IA_MODULE0_C7",               32},
 133         {"IA_MODULE1_C7",               33},
 134         {"GT_RC6",                      40},
 135         {"IUNIT_PROCESSING_IDLE",       41},
 136         {"FAR_MEM_IDLE",                43},
 137         {"DISPLAY_IDLE",                44},
 138         {"IUNIT_INPUT_SYSTEM_IDLE",     45},
 139         {"PCS_STATUS",                  60},
 140 };
 141
 142 struct telem_pcs_blkd_info {
 143         const char *name;
 144         u32 bit_pos;
 145 };
 146
 147 static struct telem_pcs_blkd_info telem_apl_pcs_idle_blkd_data[] = {
 148         {"COMPUTE",                     0},
 149         {"MISC",                        8},
 150         {"MODULE_ACTIONS_PENDING",      16},
 151         {"LTR",                         24},
 152         {"DISPLAY_WAKE",                32},
 153         {"ISP_WAKE",                    40},
 154         {"PSF0_ACTIVE",                 48},
 155 };
 156
 157 static struct telem_pcs_blkd_info telem_apl_pcs_s0ix_blkd_data[] = {
 158         {"LTR",                         0},
 159         {"IRTL",                        8},
 160         {"WAKE_DEADLINE_PENDING",       16},
 161         {"DISPLAY",                     24},
 162         {"ISP",                         32},
 163         {"CORE",                        40},
 164         {"PMC",                         48},
 165         {"MISC",                        56},
 166 };
 167
 168 struct telem_pss_ltr_info {
 169         const char *name;
 170         u32 bit_pos;
 171 };
 172
 173 static struct telem_pss_ltr_info telem_apl_pss_ltr_data[] = {
 174         {"CORE_ACTIVE",         0},
 175         {"MEM_UP",              8},
 176         {"DFX",                 16},
 177         {"DFX_FORCE_LTR",       24},
 178         {"DISPLAY",             32},
 179         {"ISP",                 40},
 180         {"SOUTH",               48},
 181 };
 182
 183 struct telem_pss_wakeup_info {
 184         const char *name;
 185         u32 bit_pos;
 186 };
 187
 188 static struct telem_pss_wakeup_info telem_apl_pss_wakeup[] = {
 189         {"IP_IDLE",                     0},
 190         {"DISPLAY_WAKE",                8},
 191         {"VOLTAGE_REG_INT",             16},
 192         {"DROWSY_TIMER (HOTPLUG)",      24},
 193         {"CORE_WAKE",                   32},
 194         {"MISC_S0IX",                   40},
 195         {"MISC_ABORT",                  56},
 196 };
 197
 198 struct telem_ioss_d0ix_stateinfo {
 199         const char *name;
 200         u32 bit_pos;
 201 };
 202
 203 static struct telem_ioss_d0ix_stateinfo telem_apl_ioss_d0ix_data[] = {
 204         {"CSE",         0},
 205         {"SCC2",        1},
 206         {"GMM",         2},
 207         {"XDCI",        3},
 208         {"XHCI",        4},
 209         {"ISH",         5},
 210         {"AVS",         6},
 211         {"PCIE0P1",     7},
 212         {"PECI0P0",     8},
 213         {"LPSS",        9},
 214         {"SCC",         10},
 215         {"PWM",         11},
 216         {"PCIE1_P3",    12},
 217         {"PCIE1_P2",    13},
 218         {"PCIE1_P1",    14},
 219         {"PCIE1_P0",    15},
 220         {"CNV",         16},
 221         {"SATA",        17},
 222         {"PRTC",        18},
 223 };
 224
 225 struct telem_ioss_pg_info {
 226         const char *name;
 227         u32 bit_pos;
 228 };
 229
 230 static struct telem_ioss_pg_info telem_apl_ioss_pg_data[] = {
 231         {"LPSS",        0},
 232         {"SCC",         1},
 233         {"P2SB",        2},
 234         {"SCC2",        3},
 235         {"GMM",         4},
 236         {"PCIE0",       5},
 237         {"XDCI",        6},
 238         {"xHCI",        7},
 239         {"CSE",         8},
 240         {"SPI",         9},
 241         {"AVSPGD4",     10},
 242         {"AVSPGD3",     11},
 243         {"AVSPGD2",     12},
 244         {"AVSPGD1",     13},
 245         {"ISH",         14},
 246         {"EXI",         15},
 247         {"NPKVRC",      16},
 248         {"NPKVNN",      17},
 249         {"CUNIT",       18},
 250         {"FUSE_CTRL",   19},
 251         {"PCIE1",       20},
 252         {"CNV",         21},
 253         {"LPC",         22},
 254         {"SATA",        23},
 255         {"SMB",         24},
 256         {"PRTC",        25},
 257 };
 258
 259
 260 struct telemetry_debugfs_conf {
 261         struct telemetry_susp_stats suspend_stats;
 262         struct dentry *telemetry_dbg_dir;
 263
 264         /* Bitmap Data */
 265         struct telem_ioss_d0ix_stateinfo *ioss_d0ix_data;
 266         struct telem_pss_idle_stateinfo *pss_idle_data;
 267         struct telem_pcs_blkd_info *pcs_idle_blkd_data;
 268         struct telem_pcs_blkd_info *pcs_s0ix_blkd_data;
 269         struct telem_pss_wakeup_info *pss_wakeup;
 270         struct telem_pss_ltr_info *pss_ltr_data;
 271         struct telem_ioss_pg_info *ioss_pg_data;
 272         u8 pcs_idle_blkd_evts;
 273         u8 pcs_s0ix_blkd_evts;
 274         u8 pss_wakeup_evts;
 275         u8 pss_idle_evts;
 276         u8 pss_ltr_evts;
 277         u8 ioss_d0ix_evts;
 278         u8 ioss_pg_evts;
 279
 280         /* IDs */
 281         u16  pss_ltr_blocking_id;
 282         u16  pcs_idle_blkd_id;
 283         u16  pcs_s0ix_blkd_id;
 284         u16  s0ix_total_occ_id;
 285         u16  s0ix_shlw_occ_id;
 286         u16  s0ix_deep_occ_id;
 287         u16  s0ix_total_res_id;
 288         u16  s0ix_shlw_res_id;
 289         u16  s0ix_deep_res_id;
 290         u16  pss_wakeup_id;
 291         u16  ioss_d0ix_id;
 292         u16  pstates_id;
 293         u16  pss_idle_id;
 294         u16  ioss_d3_id;
 295         u16  ioss_pg_id;
 296 };
 297
 298 static struct telemetry_debugfs_conf *debugfs_conf;
 299
 300 static struct telemetry_debugfs_conf telem_apl_debugfs_conf = {
 301         .pss_idle_data = telem_apl_pss_idle_data,
 302         .pcs_idle_blkd_data = telem_apl_pcs_idle_blkd_data,
 303         .pcs_s0ix_blkd_data = telem_apl_pcs_s0ix_blkd_data,
 304         .pss_ltr_data = telem_apl_pss_ltr_data,
 305         .pss_wakeup = telem_apl_pss_wakeup,
 306         .ioss_d0ix_data = telem_apl_ioss_d0ix_data,
 307         .ioss_pg_data = telem_apl_ioss_pg_data,
 308
 309         .pss_idle_evts = TELEM_EVT_LEN(telem_apl_pss_idle_data),
 310         .pcs_idle_blkd_evts = TELEM_EVT_LEN(telem_apl_pcs_idle_blkd_data),
 311         .pcs_s0ix_blkd_evts = TELEM_EVT_LEN(telem_apl_pcs_s0ix_blkd_data),
 312         .pss_ltr_evts = TELEM_EVT_LEN(telem_apl_pss_ltr_data),
 313         .pss_wakeup_evts = TELEM_EVT_LEN(telem_apl_pss_wakeup),
 314         .ioss_d0ix_evts = TELEM_EVT_LEN(telem_apl_ioss_d0ix_data),
 315         .ioss_pg_evts = TELEM_EVT_LEN(telem_apl_ioss_pg_data),
 316
 317         .pstates_id = TELEM_APL_PSS_PSTATES_ID,
 318         .pss_idle_id = TELEM_APL_PSS_IDLE_ID,
 319         .pcs_idle_blkd_id = TELEM_APL_PCS_IDLE_BLOCKED_ID,
 320         .pcs_s0ix_blkd_id = TELEM_APL_PCS_S0IX_BLOCKED_ID,
 321         .pss_wakeup_id = TELEM_APL_PSS_WAKEUP_ID,
 322         .pss_ltr_blocking_id = TELEM_APL_PSS_LTR_BLOCKING_ID,
 323         .s0ix_total_occ_id = TELEM_APL_S0IX_TOTAL_OCC_ID,
 324         .s0ix_shlw_occ_id = TELEM_APL_S0IX_SHLW_OCC_ID,
 325         .s0ix_deep_occ_id = TELEM_APL_S0IX_DEEP_OCC_ID,
 326         .s0ix_total_res_id = TELEM_APL_S0IX_TOTAL_RES_ID,
 327         .s0ix_shlw_res_id = TELEM_APL_S0IX_SHLW_RES_ID,
 328         .s0ix_deep_res_id = TELEM_APL_S0IX_DEEP_RES_ID,
 329         .ioss_d0ix_id = TELEM_APL_D0IX_ID,
 330         .ioss_d3_id = TELEM_APL_D3_ID,
 331         .ioss_pg_id = TELEM_APL_PG_ID,
 332 };
 333
 334 static const struct x86_cpu_id telemetry_debugfs_cpu_ids[] = {
 335         TELEM_DEBUGFS_CPU(INTEL_FAM6_ATOM_GOLDMONT, telem_apl_debugfs_conf),
 336         {}
 337 };
 338
 339 MODULE_DEVICE_TABLE(x86cpu, telemetry_debugfs_cpu_ids);
 340
 341 static int telemetry_debugfs_check_evts(void)
 342 {
 343         if ((debugfs_conf->pss_idle_evts > TELEM_PSS_IDLE_EVTS) ||
 344             (debugfs_conf->pcs_idle_blkd_evts > TELEM_PSS_IDLE_BLOCKED_EVTS) ||
 345             (debugfs_conf->pcs_s0ix_blkd_evts > TELEM_PSS_S0IX_BLOCKED_EVTS) ||
 346             (debugfs_conf->pss_ltr_evts > TELEM_PSS_LTR_BLOCKING_EVTS) ||
 347             (debugfs_conf->pss_wakeup_evts > TELEM_PSS_S0IX_WAKEUP_EVTS) ||
 348             (debugfs_conf->ioss_d0ix_evts > TELEM_IOSS_DX_D0IX_EVTS) ||
 349             (debugfs_conf->ioss_pg_evts > TELEM_IOSS_PG_EVTS))
 350                 return -EINVAL;
 351
 352         return 0;
 353 }
 354
 355 static int telem_pss_states_show(struct seq_file *s, void *unused)
 356 {
 357         struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
 358         struct telemetry_debugfs_conf *conf = debugfs_conf;
 359         const char *name[TELEM_MAX_OS_ALLOCATED_EVENTS];
 360         u32 pcs_idle_blkd[TELEM_PSS_IDLE_BLOCKED_EVTS],
 361             pcs_s0ix_blkd[TELEM_PSS_S0IX_BLOCKED_EVTS],
 362             pss_s0ix_wakeup[TELEM_PSS_S0IX_WAKEUP_EVTS],
 363             pss_ltr_blkd[TELEM_PSS_LTR_BLOCKING_EVTS],
 364             pss_idle[TELEM_PSS_IDLE_EVTS];
 365         int index, idx, ret, err = 0;
 366         u64 pstates = 0;
 367
 368         ret = telemetry_read_eventlog(TELEM_PSS, evtlog,
 369                                       TELEM_MAX_OS_ALLOCATED_EVENTS);
 370         if (ret < 0)
 371                 return ret;
 372
 373         err = telemetry_get_evtname(TELEM_PSS, name,
 374                                     TELEM_MAX_OS_ALLOCATED_EVENTS);
 375         if (err < 0)
 376                 return err;
 377
 378         seq_puts(s, "\n----------------------------------------------------\n");
 379         seq_puts(s, "\tPSS TELEM EVENTLOG (Residency = field/19.2 us\n");
 380         seq_puts(s, "----------------------------------------------------\n");
 381         for (index = 0; index < ret; index++) {
 382                 seq_printf(s, "%-32s %llu\n",
 383                            name[index], evtlog[index].telem_evtlog);
 384
 385                 /* Fetch PSS IDLE State */
 386                 if (evtlog[index].telem_evtid == conf->pss_idle_id) {
 387                         pss_idle[conf->pss_idle_evts - 1] =
 388                         (evtlog[index].telem_evtlog >>
 389                         conf->pss_idle_data[conf->pss_idle_evts - 1].bit_pos) &
 390                         TELEM_APL_MASK_PCS_STATE;
 391                 }
 392
 393
 394                 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_idle_id,
 395                                            conf->pss_idle_evts - 1,
 396                                            pss_idle, evtlog[index].telem_evtlog,
 397                                            conf->pss_idle_data, TELEM_MASK_BIT);
 398
 399                 TELEM_CHECK_AND_PARSE_EVTS(conf->pcs_idle_blkd_id,
 400                                            conf->pcs_idle_blkd_evts,
 401                                            pcs_idle_blkd,
 402                                            evtlog[index].telem_evtlog,
 403                                            conf->pcs_idle_blkd_data,
 404                                            TELEM_MASK_BYTE);
 405
 406                 TELEM_CHECK_AND_PARSE_EVTS(conf->pcs_s0ix_blkd_id,
 407                                            conf->pcs_s0ix_blkd_evts,
 408                                            pcs_s0ix_blkd,
 409                                            evtlog[index].telem_evtlog,
 410                                            conf->pcs_s0ix_blkd_data,
 411                                            TELEM_MASK_BYTE);
 412
 413
 414                 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_wakeup_id,
 415                                            conf->pss_wakeup_evts,
 416                                            pss_s0ix_wakeup,
 417                                            evtlog[index].telem_evtlog,
 418                                            conf->pss_wakeup, TELEM_MASK_BYTE);
 419
 420                 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_ltr_blocking_id,
 421                                            conf->pss_ltr_evts, pss_ltr_blkd,
 422                                            evtlog[index].telem_evtlog,
 423                                            conf->pss_ltr_data, TELEM_MASK_BYTE);
 424
 425                 if (evtlog[index].telem_evtid == debugfs_conf->pstates_id)
 426                         pstates = evtlog[index].telem_evtlog;
 427         }
 428
 429         seq_puts(s, "\n--------------------------------------\n");
 430         seq_puts(s, "PStates\n");
 431         seq_puts(s, "--------------------------------------\n");
 432         seq_puts(s, "Domain\t\t\t\tFreq(Mhz)\n");
 433         seq_printf(s, " IA\t\t\t\t %llu\n GT\t\t\t\t %llu\n",
 434                    (pstates & TELEM_MASK_BYTE)*100,
 435                    ((pstates >> 8) & TELEM_MASK_BYTE)*50/3);
 436
 437         seq_printf(s, " IUNIT\t\t\t\t %llu\n SA\t\t\t\t %llu\n",
 438                    ((pstates >> 16) & TELEM_MASK_BYTE)*25,
 439                    ((pstates >> 24) & TELEM_MASK_BYTE)*50/3);
 440
 441         seq_puts(s, "\n--------------------------------------\n");
 442         seq_puts(s, "PSS IDLE Status\n");
 443         seq_puts(s, "--------------------------------------\n");
 444         seq_puts(s, "Device\t\t\t\t\tIDLE\n");
 445         for (index = 0; index < debugfs_conf->pss_idle_evts; index++) {
 446                 seq_printf(s, "%-32s\t%u\n",
 447                            debugfs_conf->pss_idle_data[index].name,
 448                            pss_idle[index]);
 449         }
 450
 451         seq_puts(s, "\n--------------------------------------\n");
 452         seq_puts(s, "PSS Idle blkd Status (~1ms saturating bucket)\n");
 453         seq_puts(s, "--------------------------------------\n");
 454         seq_puts(s, "Blocker\t\t\t\t\tCount\n");
 455         for (index = 0; index < debugfs_conf->pcs_idle_blkd_evts; index++) {
 456                 seq_printf(s, "%-32s\t%u\n",
 457                            debugfs_conf->pcs_idle_blkd_data[index].name,
 458                            pcs_idle_blkd[index]);
 459         }
 460
 461         seq_puts(s, "\n--------------------------------------\n");
 462         seq_puts(s, "PSS S0ix blkd Status (~1ms saturating bucket)\n");
 463         seq_puts(s, "--------------------------------------\n");
 464         seq_puts(s, "Blocker\t\t\t\t\tCount\n");
 465         for (index = 0; index < debugfs_conf->pcs_s0ix_blkd_evts; index++) {
 466                 seq_printf(s, "%-32s\t%u\n",
 467                            debugfs_conf->pcs_s0ix_blkd_data[index].name,
 468                            pcs_s0ix_blkd[index]);
 469         }
 470
 471         seq_puts(s, "\n--------------------------------------\n");
 472         seq_puts(s, "LTR Blocking Status (~1ms saturating bucket)\n");
 473         seq_puts(s, "--------------------------------------\n");
 474         seq_puts(s, "Blocker\t\t\t\t\tCount\n");
 475         for (index = 0; index < debugfs_conf->pss_ltr_evts; index++) {
 476                 seq_printf(s, "%-32s\t%u\n",
 477                            debugfs_conf->pss_ltr_data[index].name,
 478                            pss_s0ix_wakeup[index]);
 479         }
 480
 481         seq_puts(s, "\n--------------------------------------\n");
 482         seq_puts(s, "Wakes Status (~1ms saturating bucket)\n");
 483         seq_puts(s, "--------------------------------------\n");
 484         seq_puts(s, "Wakes\t\t\t\t\tCount\n");
 485         for (index = 0; index < debugfs_conf->pss_wakeup_evts; index++) {
 486                 seq_printf(s, "%-32s\t%u\n",
 487                            debugfs_conf->pss_wakeup[index].name,
 488                            pss_ltr_blkd[index]);
 489         }
 490
 491         return 0;
 492 }
 493
 494 static int telem_pss_state_open(struct inode *inode, struct file *file)
 495 {
 496         return single_open(file, telem_pss_states_show, inode->i_private);
 497 }
 498
 499 static const struct file_operations telem_pss_ops = {
 500         .open           = telem_pss_state_open,
 501         .read           = seq_read,
 502         .llseek         = seq_lseek,
 503         .release        = single_release,
 504 };
 505
 506
 507 static int telem_ioss_states_show(struct seq_file *s, void *unused)
 508 {
 509         struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
 510         const char *name[TELEM_MAX_OS_ALLOCATED_EVENTS];
 511         int index, ret, err;
 512
 513         ret = telemetry_read_eventlog(TELEM_IOSS, evtlog,
 514                                       TELEM_MAX_OS_ALLOCATED_EVENTS);
 515         if (ret < 0)
 516                 return ret;
 517
 518         err = telemetry_get_evtname(TELEM_IOSS, name,
 519                                     TELEM_MAX_OS_ALLOCATED_EVENTS);
 520         if (err < 0)
 521                 return err;
 522
 523         seq_puts(s, "--------------------------------------\n");
 524         seq_puts(s, "\tI0SS TELEMETRY EVENTLOG\n");
 525         seq_puts(s, "--------------------------------------\n");
 526         for (index = 0; index < ret; index++) {
 527                 seq_printf(s, "%-32s 0x%llx\n",
 528                            name[index], evtlog[index].telem_evtlog);
 529         }
 530
 531         return 0;
 532 }
 533
 534 static int telem_ioss_state_open(struct inode *inode, struct file *file)
 535 {
 536         return single_open(file, telem_ioss_states_show, inode->i_private);
 537 }
 538
 539 static const struct file_operations telem_ioss_ops = {
 540         .open           = telem_ioss_state_open,
 541         .read           = seq_read,
 542         .llseek         = seq_lseek,
 543         .release        = single_release,
 544 };
 545
 546 static int telem_soc_states_show(struct seq_file *s, void *unused)
 547 {
 548         u32 d3_sts[TELEM_IOSS_DX_D0IX_EVTS], d0ix_sts[TELEM_IOSS_DX_D0IX_EVTS];
 549         u32 pg_sts[TELEM_IOSS_PG_EVTS], pss_idle[TELEM_PSS_IDLE_EVTS];
 550         struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
 551         u32 s0ix_total_ctr = 0, s0ix_shlw_ctr = 0, s0ix_deep_ctr = 0;
 552         u64 s0ix_total_res = 0, s0ix_shlw_res = 0, s0ix_deep_res = 0;
 553         struct telemetry_debugfs_conf *conf = debugfs_conf;
 554         struct pci_dev *dev = NULL;
 555         int index, idx, ret;
 556         u32 d3_state;
 557         u16 pmcsr;
 558
 559         ret = telemetry_read_eventlog(TELEM_IOSS, evtlog,
 560                                       TELEM_MAX_OS_ALLOCATED_EVENTS);
 561         if (ret < 0)
 562                 return ret;
 563
 564         for (index = 0; index < ret; index++) {
 565                 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_d3_id,
 566                                            conf->ioss_d0ix_evts,
 567                                            d3_sts, evtlog[index].telem_evtlog,
 568                                            conf->ioss_d0ix_data,
 569                                            TELEM_MASK_BIT);
 570
 571                 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_pg_id, conf->ioss_pg_evts,
 572                                            pg_sts, evtlog[index].telem_evtlog,
 573                                            conf->ioss_pg_data, TELEM_MASK_BIT);
 574
 575                 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_d0ix_id,
 576                                            conf->ioss_d0ix_evts,
 577                                            d0ix_sts, evtlog[index].telem_evtlog,
 578                                            conf->ioss_d0ix_data,
 579                                            TELEM_MASK_BIT);
 580
 581                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_total_occ_id,
 582                                            s0ix_total_ctr);
 583
 584                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
 585                                            s0ix_shlw_ctr);
 586
 587                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
 588                                            s0ix_deep_ctr);
 589
 590                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_total_res_id,
 591                                            s0ix_total_res);
 592
 593                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
 594                                            s0ix_shlw_res);
 595
 596                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
 597                                            s0ix_deep_res);
 598         }
 599
 600         seq_puts(s, "\n---------------------------------------------------\n");
 601         seq_puts(s, "S0IX Type\t\t\t Occurrence\t\t Residency(us)\n");
 602         seq_puts(s, "---------------------------------------------------\n");
 603
 604         seq_printf(s, "S0IX Shallow\t\t\t %10u\t %10llu\n",
 605                    s0ix_shlw_ctr -
 606                    conf->suspend_stats.shlw_ctr -
 607                    conf->suspend_stats.shlw_swake_ctr,
 608                    (u64)((s0ix_shlw_res -
 609                    conf->suspend_stats.shlw_res -
 610                    conf->suspend_stats.shlw_swake_res)*10/192));
 611
 612         seq_printf(s, "S0IX Deep\t\t\t %10u\t %10llu\n",
 613                    s0ix_deep_ctr -
 614                    conf->suspend_stats.deep_ctr -
 615                    conf->suspend_stats.deep_swake_ctr,
 616                    (u64)((s0ix_deep_res -
 617                    conf->suspend_stats.deep_res -
 618                    conf->suspend_stats.deep_swake_res)*10/192));
 619
 620         seq_printf(s, "Suspend(With S0ixShallow)\t %10u\t %10llu\n",
 621                    conf->suspend_stats.shlw_ctr,
 622                    (u64)(conf->suspend_stats.shlw_res*10)/192);
 623
 624         seq_printf(s, "Suspend(With S0ixDeep)\t\t %10u\t %10llu\n",
 625                    conf->suspend_stats.deep_ctr,
 626                    (u64)(conf->suspend_stats.deep_res*10)/192);
 627
 628         seq_printf(s, "Suspend(With Shallow-Wakes)\t %10u\t %10llu\n",
 629                    conf->suspend_stats.shlw_swake_ctr +
 630                    conf->suspend_stats.deep_swake_ctr,
 631                    (u64)((conf->suspend_stats.shlw_swake_res +
 632                    conf->suspend_stats.deep_swake_res)*10/192));
 633
 634         seq_printf(s, "S0IX+Suspend Total\t\t %10u\t %10llu\n", s0ix_total_ctr,
 635                                 (u64)(s0ix_total_res*10/192));
 636         seq_puts(s, "\n-------------------------------------------------\n");
 637         seq_puts(s, "\t\tDEVICE STATES\n");
 638         seq_puts(s, "-------------------------------------------------\n");
 639
 640         for_each_pci_dev(dev) {
 641                 pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr);
 642                 d3_state = ((pmcsr & PCI_PM_CTRL_STATE_MASK) ==
 643                             (__force int)PCI_D3hot) ? 1 : 0;
 644
 645                 seq_printf(s, "pci %04x %04X %s %20.20s: ",
 646                            dev->vendor, dev->device, dev_name(&dev->dev),
 647                            dev_driver_string(&dev->dev));
 648                 seq_printf(s, " d3:%x\n", d3_state);
 649         }
 650
 651         seq_puts(s, "\n--------------------------------------\n");
 652         seq_puts(s, "D3/D0i3 Status\n");
 653         seq_puts(s, "--------------------------------------\n");
 654         seq_puts(s, "Block\t\t D3\t D0i3\n");
 655         for (index = 0; index < conf->ioss_d0ix_evts; index++) {
 656                 seq_printf(s, "%-10s\t %u\t %u\n",
 657                            conf->ioss_d0ix_data[index].name,
 658                            d3_sts[index], d0ix_sts[index]);
 659         }
 660
 661         seq_puts(s, "\n--------------------------------------\n");
 662         seq_puts(s, "South Complex PowerGate Status\n");
 663         seq_puts(s, "--------------------------------------\n");
 664         seq_puts(s, "Device\t\t PG\n");
 665         for (index = 0; index < conf->ioss_pg_evts; index++) {
 666                 seq_printf(s, "%-10s\t %u\n",
 667                            conf->ioss_pg_data[index].name,
 668                            pg_sts[index]);
 669         }
 670
 671         evtlog->telem_evtid = conf->pss_idle_id;
 672         ret = telemetry_read_events(TELEM_PSS, evtlog, 1);
 673         if (ret < 0)
 674                 return ret;
 675
 676         seq_puts(s, "\n-----------------------------------------\n");
 677         seq_puts(s, "North Idle Status\n");
 678         seq_puts(s, "-----------------------------------------\n");
 679         for (idx = 0; idx < conf->pss_idle_evts - 1; idx++) {
 680                 pss_idle[idx] = (evtlog->telem_evtlog >>
 681                                 conf->pss_idle_data[idx].bit_pos) &
 682                                 TELEM_MASK_BIT;
 683         }
 684
 685         pss_idle[idx] = (evtlog->telem_evtlog >>
 686                         conf->pss_idle_data[idx].bit_pos) &
 687                         TELEM_APL_MASK_PCS_STATE;
 688
 689         for (index = 0; index < conf->pss_idle_evts; index++) {
 690                 seq_printf(s, "%-30s %u\n",
 691                            conf->pss_idle_data[index].name,
 692                            pss_idle[index]);
 693         }
 694
 695         seq_puts(s, "\nPCS_STATUS Code\n");
 696         seq_puts(s, "0:C0 1:C1 2:C1_DN_WT_DEV 3:C2 4:C2_WT_DE_MEM_UP\n");
 697         seq_puts(s, "5:C2_WT_DE_MEM_DOWN 6:C2_UP_WT_DEV 7:C2_DN 8:C2_VOA\n");
 698         seq_puts(s, "9:C2_VOA_UP 10:S0IX_PRE 11:S0IX\n");
 699
 700         return 0;
 701 }
 702
 703 static int telem_soc_state_open(struct inode *inode, struct file *file)
 704 {
 705         return single_open(file, telem_soc_states_show, inode->i_private);
 706 }
 707
 708 static const struct file_operations telem_socstate_ops = {
 709         .open           = telem_soc_state_open,
 710         .read           = seq_read,
 711         .llseek         = seq_lseek,
 712         .release        = single_release,
 713 };
 714
 715 static int telem_pss_trc_verb_show(struct seq_file *s, void *unused)
 716 {
 717         u32 verbosity;
 718         int err;
 719
 720         err = telemetry_get_trace_verbosity(TELEM_PSS, &verbosity);
 721         if (err) {
 722                 pr_err("Get PSS Trace Verbosity Failed with Error %d\n", err);
 723                 return -EFAULT;
 724         }
 725
 726         seq_printf(s, "PSS Trace Verbosity %u\n", verbosity);
 727         return 0;
 728 }
 729
 730 static ssize_t telem_pss_trc_verb_write(struct file *file,
 731                                         const char __user *userbuf,
 732                                         size_t count, loff_t *ppos)
 733 {
 734         u32 verbosity;
 735         int err;
 736
 737         if (kstrtou32_from_user(userbuf, count, 0, &verbosity))
 738                 return -EFAULT;
 739
 740         err = telemetry_set_trace_verbosity(TELEM_PSS, verbosity);
 741         if (err) {
 742                 pr_err("Changing PSS Trace Verbosity Failed. Error %d\n", err);
 743                 count = err;
 744         }
 745
 746         return count;
 747 }
 748
 749 static int telem_pss_trc_verb_open(struct inode *inode, struct file *file)
 750 {
 751         return single_open(file, telem_pss_trc_verb_show, inode->i_private);
 752 }
 753
 754 static const struct file_operations telem_pss_trc_verb_ops = {
 755         .open           = telem_pss_trc_verb_open,
 756         .read           = seq_read,
 757         .write          = telem_pss_trc_verb_write,
 758         .llseek         = seq_lseek,
 759         .release        = single_release,
 760 };
 761
 762
 763 static int telem_ioss_trc_verb_show(struct seq_file *s, void *unused)
 764 {
 765         u32 verbosity;
 766         int err;
 767
 768         err = telemetry_get_trace_verbosity(TELEM_IOSS, &verbosity);
 769         if (err) {
 770                 pr_err("Get IOSS Trace Verbosity Failed with Error %d\n", err);
 771                 return -EFAULT;
 772         }
 773
 774         seq_printf(s, "IOSS Trace Verbosity %u\n", verbosity);
 775         return 0;
 776 }
 777
 778 static ssize_t telem_ioss_trc_verb_write(struct file *file,
 779                                          const char __user *userbuf,
 780                                          size_t count, loff_t *ppos)
 781 {
 782         u32 verbosity;
 783         int err;
 784
 785         if (kstrtou32_from_user(userbuf, count, 0, &verbosity))
 786                 return -EFAULT;
 787
 788         err = telemetry_set_trace_verbosity(TELEM_IOSS, verbosity);
 789         if (err) {
 790                 pr_err("Changing IOSS Trace Verbosity Failed. Error %d\n", err);
 791                 count = err;
 792         }
 793
 794         return count;
 795 }
 796
 797 static int telem_ioss_trc_verb_open(struct inode *inode, struct file *file)
 798 {
 799         return single_open(file, telem_ioss_trc_verb_show, inode->i_private);
 800 }
 801
 802 static const struct file_operations telem_ioss_trc_verb_ops = {
 803         .open           = telem_ioss_trc_verb_open,
 804         .read           = seq_read,
 805         .write          = telem_ioss_trc_verb_write,
 806         .llseek         = seq_lseek,
 807         .release        = single_release,
 808 };
 809
 810 #ifdef CONFIG_PM_SLEEP
 811 static int pm_suspend_prep_cb(void)
 812 {
 813         struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
 814         struct telemetry_debugfs_conf *conf = debugfs_conf;
 815         int ret, index;
 816
 817         ret = telemetry_raw_read_eventlog(TELEM_IOSS, evtlog,
 818                         TELEM_MAX_OS_ALLOCATED_EVENTS);
 819         if (ret < 0) {
 820                 suspend_prep_ok = 0;
 821                 goto out;
 822         }
 823
 824         for (index = 0; index < ret; index++) {
 825
 826                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
 827                                            suspend_shlw_ctr_temp);
 828
 829                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
 830                                            suspend_deep_ctr_temp);
 831
 832                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
 833                                            suspend_shlw_res_temp);
 834
 835                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
 836                                            suspend_deep_res_temp);
 837         }
 838         suspend_prep_ok = 1;
 839 out:
 840         return NOTIFY_OK;
 841 }
 842
 843 static int pm_suspend_exit_cb(void)
 844 {
 845         struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
 846         static u32 suspend_shlw_ctr_exit, suspend_deep_ctr_exit;
 847         static u64 suspend_shlw_res_exit, suspend_deep_res_exit;
 848         struct telemetry_debugfs_conf *conf = debugfs_conf;
 849         int ret, index;
 850
 851         if (!suspend_prep_ok)
 852                 goto out;
 853
 854         ret = telemetry_raw_read_eventlog(TELEM_IOSS, evtlog,
 855                                           TELEM_MAX_OS_ALLOCATED_EVENTS);
 856         if (ret < 0)
 857                 goto out;
 858
 859         for (index = 0; index < ret; index++) {
 860                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
 861                                            suspend_shlw_ctr_exit);
 862
 863                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
 864                                            suspend_deep_ctr_exit);
 865
 866                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
 867                                            suspend_shlw_res_exit);
 868
 869                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
 870                                            suspend_deep_res_exit);
 871         }
 872
 873         if ((suspend_shlw_ctr_exit < suspend_shlw_ctr_temp) ||
 874             (suspend_deep_ctr_exit < suspend_deep_ctr_temp) ||
 875             (suspend_shlw_res_exit < suspend_shlw_res_temp) ||
 876             (suspend_deep_res_exit < suspend_deep_res_temp)) {
 877                 pr_err("Wrong s0ix counters detected\n");
 878                 goto out;
 879         }
 880
 881         suspend_shlw_ctr_exit -= suspend_shlw_ctr_temp;
 882         suspend_deep_ctr_exit -= suspend_deep_ctr_temp;
 883         suspend_shlw_res_exit -= suspend_shlw_res_temp;
 884         suspend_deep_res_exit -= suspend_deep_res_temp;
 885
 886         if (suspend_shlw_ctr_exit == 1) {
 887                 conf->suspend_stats.shlw_ctr +=
 888                 suspend_shlw_ctr_exit;
 889
 890                 conf->suspend_stats.shlw_res +=
 891                 suspend_shlw_res_exit;
 892         }
 893         /* Shallow Wakes Case */
 894         else if (suspend_shlw_ctr_exit > 1) {
 895                 conf->suspend_stats.shlw_swake_ctr +=
 896                 suspend_shlw_ctr_exit;
 897
 898                 conf->suspend_stats.shlw_swake_res +=
 899                 suspend_shlw_res_exit;
 900         }
 901
 902         if (suspend_deep_ctr_exit == 1) {
 903                 conf->suspend_stats.deep_ctr +=
 904                 suspend_deep_ctr_exit;
 905
 906                 conf->suspend_stats.deep_res +=
 907                 suspend_deep_res_exit;
 908         }
 909
 910         /* Shallow Wakes Case */
 911         else if (suspend_deep_ctr_exit > 1) {
 912                 conf->suspend_stats.deep_swake_ctr +=
 913                 suspend_deep_ctr_exit;
 914
 915                 conf->suspend_stats.deep_swake_res +=
 916                 suspend_deep_res_exit;
 917         }
 918
 919 out:
 920         suspend_prep_ok = 0;
 921         return NOTIFY_OK;
 922 }
 923
 924 static int pm_notification(struct notifier_block *this,
 925                            unsigned long event, void *ptr)
 926 {
 927         switch (event) {
 928         case PM_SUSPEND_PREPARE:
 929                 return pm_suspend_prep_cb();
 930         case PM_POST_SUSPEND:
 931                 return pm_suspend_exit_cb();
 932         }
 933
 934         return NOTIFY_DONE;
 935 }
 936
 937 static struct notifier_block pm_notifier = {
 938         .notifier_call = pm_notification,
 939 };
 940 #endif /* CONFIG_PM_SLEEP */
 941
 942 static int __init telemetry_debugfs_init(void)
 943 {
 944         const struct x86_cpu_id *id;
 945         int err = -ENOMEM;
 946         struct dentry *f;
 947
 948         /* Only APL supported for now */
 949         id = x86_match_cpu(telemetry_debugfs_cpu_ids);
 950         if (!id)
 951                 return -ENODEV;
 952
 953         debugfs_conf = (struct telemetry_debugfs_conf *)id->driver_data;
 954
 955         err = telemetry_pltconfig_valid();
 956         if (err < 0) {
 957                 pr_info("Invalid pltconfig, ensure IPC1 device is enabled in BIOS\n");
 958                 return -ENODEV;
 959         }
 960
 961         err = telemetry_debugfs_check_evts();
 962         if (err < 0) {
 963                 pr_info("telemetry_debugfs_check_evts failed\n");
 964                 return -EINVAL;
 965         }
 966
 967
 968 #ifdef CONFIG_PM_SLEEP
 969         register_pm_notifier(&pm_notifier);
 970 #endif /* CONFIG_PM_SLEEP */
 971
 972         debugfs_conf->telemetry_dbg_dir = debugfs_create_dir("telemetry", NULL);
 973         if (!debugfs_conf->telemetry_dbg_dir)
 974                 return -ENOMEM;
 975
 976         f = debugfs_create_file("pss_info", S_IFREG | S_IRUGO,
 977                                 debugfs_conf->telemetry_dbg_dir, NULL,
 978                                 &telem_pss_ops);
 979         if (!f) {
 980                 pr_err("pss_sample_info debugfs register failed\n");
 981                 goto out;
 982         }
 983
 984         f = debugfs_create_file("ioss_info", S_IFREG | S_IRUGO,
 985                                 debugfs_conf->telemetry_dbg_dir, NULL,
 986                                 &telem_ioss_ops);
 987         if (!f) {
 988                 pr_err("ioss_sample_info debugfs register failed\n");
 989                 goto out;
 990         }
 991
 992         f = debugfs_create_file("soc_states", S_IFREG | S_IRUGO,
 993                                 debugfs_conf->telemetry_dbg_dir,
 994                                 NULL, &telem_socstate_ops);
 995         if (!f) {
 996                 pr_err("ioss_sample_info debugfs register failed\n");
 997                 goto out;
 998         }
 999
1000         f = debugfs_create_file("pss_trace_verbosity", S_IFREG | S_IRUGO,
1001                                 debugfs_conf->telemetry_dbg_dir, NULL,
1002                                 &telem_pss_trc_verb_ops);
1003         if (!f) {
1004                 pr_err("pss_trace_verbosity debugfs register failed\n");
1005                 goto out;
1006         }
1007
1008         f = debugfs_create_file("ioss_trace_verbosity", S_IFREG | S_IRUGO,
1009                                 debugfs_conf->telemetry_dbg_dir, NULL,
1010                                 &telem_ioss_trc_verb_ops);
1011         if (!f) {
1012                 pr_err("ioss_trace_verbosity debugfs register failed\n");
1013                 goto out;
1014         }
1015
1016         return 0;
1017
1018 out:
1019         debugfs_remove_recursive(debugfs_conf->telemetry_dbg_dir);
1020         debugfs_conf->telemetry_dbg_dir = NULL;
1021
1022         return err;
1023 }
1024
1025 static void __exit telemetry_debugfs_exit(void)
1026 {
1027         debugfs_remove_recursive(debugfs_conf->telemetry_dbg_dir);
1028         debugfs_conf->telemetry_dbg_dir = NULL;
1029 }
1030
1031 late_initcall(telemetry_debugfs_init);
1032 module_exit(telemetry_debugfs_exit);
1033
1034 MODULE_AUTHOR("Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>");
1035 MODULE_DESCRIPTION("Intel SoC Telemetry debugfs Interface");
1036 MODULE_VERSION(DRIVER_VERSION);
1037 MODULE_LICENSE("GPL");