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 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_GEMINI_LAKE, telem_apl_debugfs_conf),
 335         {}
 336 };
 337
 338 MODULE_DEVICE_TABLE(x86cpu, telemetry_debugfs_cpu_ids);
 339
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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                 return -ENODEV;
 973
 974         err = telemetry_debugfs_check_evts();
 975         if (err < 0)
 976                 return -EINVAL;
 977
 978         register_pm_notifier(&pm_notifier);
 979
 980         err = -ENOMEM;
 981         debugfs_conf->telemetry_dbg_dir = debugfs_create_dir("telemetry", NULL);
 982         if (!debugfs_conf->telemetry_dbg_dir)
 983                 goto out_pm;
 984
 985         f = debugfs_create_file("pss_info", S_IFREG | S_IRUGO,
 986                                 debugfs_conf->telemetry_dbg_dir, NULL,
 987                                 &telem_pss_ops);
 988         if (!f) {
 989                 pr_err("pss_sample_info debugfs register failed\n");
 990                 goto out;
 991         }
 992
 993         f = debugfs_create_file("ioss_info", S_IFREG | S_IRUGO,
 994                                 debugfs_conf->telemetry_dbg_dir, NULL,
 995                                 &telem_ioss_ops);
 996         if (!f) {
 997                 pr_err("ioss_sample_info debugfs register failed\n");
 998                 goto out;
 999         }
1000
1001         f = debugfs_create_file("soc_states", S_IFREG | S_IRUGO,
1002                                 debugfs_conf->telemetry_dbg_dir,
1003                                 NULL, &telem_socstate_ops);
1004         if (!f) {
1005                 pr_err("ioss_sample_info debugfs register failed\n");
1006                 goto out;
1007         }
1008
1009         f = debugfs_create_file("s0ix_residency_usec", S_IFREG | S_IRUGO,
1010                                 debugfs_conf->telemetry_dbg_dir,
1011                                 NULL, &telem_s0ix_fops);
1012         if (!f) {
1013                 pr_err("s0ix_residency_usec debugfs register failed\n");
1014                 goto out;
1015         }
1016
1017         f = debugfs_create_file("pss_trace_verbosity", S_IFREG | S_IRUGO,
1018                                 debugfs_conf->telemetry_dbg_dir, NULL,
1019                                 &telem_pss_trc_verb_ops);
1020         if (!f) {
1021                 pr_err("pss_trace_verbosity debugfs register failed\n");
1022                 goto out;
1023         }
1024
1025         f = debugfs_create_file("ioss_trace_verbosity", S_IFREG | S_IRUGO,
1026                                 debugfs_conf->telemetry_dbg_dir, NULL,
1027                                 &telem_ioss_trc_verb_ops);
1028         if (!f) {
1029                 pr_err("ioss_trace_verbosity debugfs register failed\n");
1030                 goto out;
1031         }
1032
1033         return 0;
1034
1035 out:
1036         debugfs_remove_recursive(debugfs_conf->telemetry_dbg_dir);
1037         debugfs_conf->telemetry_dbg_dir = NULL;
1038 out_pm:
1039         unregister_pm_notifier(&pm_notifier);
1040
1041         return err;
1042 }
1043
1044 static void __exit telemetry_debugfs_exit(void)
1045 {
1046         debugfs_remove_recursive(debugfs_conf->telemetry_dbg_dir);
1047         debugfs_conf->telemetry_dbg_dir = NULL;
1048         unregister_pm_notifier(&pm_notifier);
1049 }
1050
1051 late_initcall(telemetry_debugfs_init);
1052 module_exit(telemetry_debugfs_exit);
1053
1054 MODULE_AUTHOR("Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>");
1055 MODULE_DESCRIPTION("Intel SoC Telemetry debugfs Interface");
1056 MODULE_VERSION(DRIVER_VERSION);
1057 MODULE_LICENSE("GPL");