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         {}
 335 };
 336
 337 MODULE_DEVICE_TABLE(x86cpu, telemetry_debugfs_cpu_ids);
 338
 339 static int telemetry_debugfs_check_evts(void)
 340 {
 341         if ((debugfs_conf->pss_idle_evts > TELEM_PSS_IDLE_EVTS) ||
 342             (debugfs_conf->pcs_idle_blkd_evts > TELEM_PSS_IDLE_BLOCKED_EVTS) ||
 343             (debugfs_conf->pcs_s0ix_blkd_evts > TELEM_PSS_S0IX_BLOCKED_EVTS) ||
 344             (debugfs_conf->pss_ltr_evts > TELEM_PSS_LTR_BLOCKING_EVTS) ||
 345             (debugfs_conf->pss_wakeup_evts > TELEM_PSS_S0IX_WAKEUP_EVTS) ||
 346             (debugfs_conf->ioss_d0ix_evts > TELEM_IOSS_DX_D0IX_EVTS) ||
 347             (debugfs_conf->ioss_pg_evts > TELEM_IOSS_PG_EVTS))
 348                 return -EINVAL;
 349
 350         return 0;
 351 }
 352
 353 static int telem_pss_states_show(struct seq_file *s, void *unused)
 354 {
 355         struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
 356         struct telemetry_debugfs_conf *conf = debugfs_conf;
 357         const char *name[TELEM_MAX_OS_ALLOCATED_EVENTS];
 358         u32 pcs_idle_blkd[TELEM_PSS_IDLE_BLOCKED_EVTS],
 359             pcs_s0ix_blkd[TELEM_PSS_S0IX_BLOCKED_EVTS],
 360             pss_s0ix_wakeup[TELEM_PSS_S0IX_WAKEUP_EVTS],
 361             pss_ltr_blkd[TELEM_PSS_LTR_BLOCKING_EVTS],
 362             pss_idle[TELEM_PSS_IDLE_EVTS];
 363         int index, idx, ret, err = 0;
 364         u64 pstates = 0;
 365
 366         ret = telemetry_read_eventlog(TELEM_PSS, evtlog,
 367                                       TELEM_MAX_OS_ALLOCATED_EVENTS);
 368         if (ret < 0)
 369                 return ret;
 370
 371         err = telemetry_get_evtname(TELEM_PSS, name,
 372                                     TELEM_MAX_OS_ALLOCATED_EVENTS);
 373         if (err < 0)
 374                 return err;
 375
 376         seq_puts(s, "\n----------------------------------------------------\n");
 377         seq_puts(s, "\tPSS TELEM EVENTLOG (Residency = field/19.2 us\n");
 378         seq_puts(s, "----------------------------------------------------\n");
 379         for (index = 0; index < ret; index++) {
 380                 seq_printf(s, "%-32s %llu\n",
 381                            name[index], evtlog[index].telem_evtlog);
 382
 383                 /* Fetch PSS IDLE State */
 384                 if (evtlog[index].telem_evtid == conf->pss_idle_id) {
 385                         pss_idle[conf->pss_idle_evts - 1] =
 386                         (evtlog[index].telem_evtlog >>
 387                         conf->pss_idle_data[conf->pss_idle_evts - 1].bit_pos) &
 388                         TELEM_APL_MASK_PCS_STATE;
 389                 }
 390
 391
 392                 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_idle_id,
 393                                            conf->pss_idle_evts - 1,
 394                                            pss_idle, evtlog[index].telem_evtlog,
 395                                            conf->pss_idle_data, TELEM_MASK_BIT);
 396
 397                 TELEM_CHECK_AND_PARSE_EVTS(conf->pcs_idle_blkd_id,
 398                                            conf->pcs_idle_blkd_evts,
 399                                            pcs_idle_blkd,
 400                                            evtlog[index].telem_evtlog,
 401                                            conf->pcs_idle_blkd_data,
 402                                            TELEM_MASK_BYTE);
 403
 404                 TELEM_CHECK_AND_PARSE_EVTS(conf->pcs_s0ix_blkd_id,
 405                                            conf->pcs_s0ix_blkd_evts,
 406                                            pcs_s0ix_blkd,
 407                                            evtlog[index].telem_evtlog,
 408                                            conf->pcs_s0ix_blkd_data,
 409                                            TELEM_MASK_BYTE);
 410
 411
 412                 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_wakeup_id,
 413                                            conf->pss_wakeup_evts,
 414                                            pss_s0ix_wakeup,
 415                                            evtlog[index].telem_evtlog,
 416                                            conf->pss_wakeup, TELEM_MASK_BYTE);
 417
 418                 TELEM_CHECK_AND_PARSE_EVTS(conf->pss_ltr_blocking_id,
 419                                            conf->pss_ltr_evts, pss_ltr_blkd,
 420                                            evtlog[index].telem_evtlog,
 421                                            conf->pss_ltr_data, TELEM_MASK_BYTE);
 422
 423                 if (evtlog[index].telem_evtid == debugfs_conf->pstates_id)
 424                         pstates = evtlog[index].telem_evtlog;
 425         }
 426
 427         seq_puts(s, "\n--------------------------------------\n");
 428         seq_puts(s, "PStates\n");
 429         seq_puts(s, "--------------------------------------\n");
 430         seq_puts(s, "Domain\t\t\t\tFreq(Mhz)\n");
 431         seq_printf(s, " IA\t\t\t\t %llu\n GT\t\t\t\t %llu\n",
 432                    (pstates & TELEM_MASK_BYTE)*100,
 433                    ((pstates >> 8) & TELEM_MASK_BYTE)*50/3);
 434
 435         seq_printf(s, " IUNIT\t\t\t\t %llu\n SA\t\t\t\t %llu\n",
 436                    ((pstates >> 16) & TELEM_MASK_BYTE)*25,
 437                    ((pstates >> 24) & TELEM_MASK_BYTE)*50/3);
 438
 439         seq_puts(s, "\n--------------------------------------\n");
 440         seq_puts(s, "PSS IDLE Status\n");
 441         seq_puts(s, "--------------------------------------\n");
 442         seq_puts(s, "Device\t\t\t\t\tIDLE\n");
 443         for (index = 0; index < debugfs_conf->pss_idle_evts; index++) {
 444                 seq_printf(s, "%-32s\t%u\n",
 445                            debugfs_conf->pss_idle_data[index].name,
 446                            pss_idle[index]);
 447         }
 448
 449         seq_puts(s, "\n--------------------------------------\n");
 450         seq_puts(s, "PSS Idle blkd Status (~1ms saturating bucket)\n");
 451         seq_puts(s, "--------------------------------------\n");
 452         seq_puts(s, "Blocker\t\t\t\t\tCount\n");
 453         for (index = 0; index < debugfs_conf->pcs_idle_blkd_evts; index++) {
 454                 seq_printf(s, "%-32s\t%u\n",
 455                            debugfs_conf->pcs_idle_blkd_data[index].name,
 456                            pcs_idle_blkd[index]);
 457         }
 458
 459         seq_puts(s, "\n--------------------------------------\n");
 460         seq_puts(s, "PSS S0ix blkd Status (~1ms saturating bucket)\n");
 461         seq_puts(s, "--------------------------------------\n");
 462         seq_puts(s, "Blocker\t\t\t\t\tCount\n");
 463         for (index = 0; index < debugfs_conf->pcs_s0ix_blkd_evts; index++) {
 464                 seq_printf(s, "%-32s\t%u\n",
 465                            debugfs_conf->pcs_s0ix_blkd_data[index].name,
 466                            pcs_s0ix_blkd[index]);
 467         }
 468
 469         seq_puts(s, "\n--------------------------------------\n");
 470         seq_puts(s, "LTR Blocking Status (~1ms saturating bucket)\n");
 471         seq_puts(s, "--------------------------------------\n");
 472         seq_puts(s, "Blocker\t\t\t\t\tCount\n");
 473         for (index = 0; index < debugfs_conf->pss_ltr_evts; index++) {
 474                 seq_printf(s, "%-32s\t%u\n",
 475                            debugfs_conf->pss_ltr_data[index].name,
 476                            pss_s0ix_wakeup[index]);
 477         }
 478
 479         seq_puts(s, "\n--------------------------------------\n");
 480         seq_puts(s, "Wakes Status (~1ms saturating bucket)\n");
 481         seq_puts(s, "--------------------------------------\n");
 482         seq_puts(s, "Wakes\t\t\t\t\tCount\n");
 483         for (index = 0; index < debugfs_conf->pss_wakeup_evts; index++) {
 484                 seq_printf(s, "%-32s\t%u\n",
 485                            debugfs_conf->pss_wakeup[index].name,
 486                            pss_ltr_blkd[index]);
 487         }
 488
 489         return 0;
 490 }
 491
 492 static int telem_pss_state_open(struct inode *inode, struct file *file)
 493 {
 494         return single_open(file, telem_pss_states_show, inode->i_private);
 495 }
 496
 497 static const struct file_operations telem_pss_ops = {
 498         .open           = telem_pss_state_open,
 499         .read           = seq_read,
 500         .llseek         = seq_lseek,
 501         .release        = single_release,
 502 };
 503
 504
 505 static int telem_ioss_states_show(struct seq_file *s, void *unused)
 506 {
 507         struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
 508         const char *name[TELEM_MAX_OS_ALLOCATED_EVENTS];
 509         int index, ret, err;
 510
 511         ret = telemetry_read_eventlog(TELEM_IOSS, evtlog,
 512                                       TELEM_MAX_OS_ALLOCATED_EVENTS);
 513         if (ret < 0)
 514                 return ret;
 515
 516         err = telemetry_get_evtname(TELEM_IOSS, name,
 517                                     TELEM_MAX_OS_ALLOCATED_EVENTS);
 518         if (err < 0)
 519                 return err;
 520
 521         seq_puts(s, "--------------------------------------\n");
 522         seq_puts(s, "\tI0SS TELEMETRY EVENTLOG\n");
 523         seq_puts(s, "--------------------------------------\n");
 524         for (index = 0; index < ret; index++) {
 525                 seq_printf(s, "%-32s 0x%llx\n",
 526                            name[index], evtlog[index].telem_evtlog);
 527         }
 528
 529         return 0;
 530 }
 531
 532 static int telem_ioss_state_open(struct inode *inode, struct file *file)
 533 {
 534         return single_open(file, telem_ioss_states_show, inode->i_private);
 535 }
 536
 537 static const struct file_operations telem_ioss_ops = {
 538         .open           = telem_ioss_state_open,
 539         .read           = seq_read,
 540         .llseek         = seq_lseek,
 541         .release        = single_release,
 542 };
 543
 544 static int telem_soc_states_show(struct seq_file *s, void *unused)
 545 {
 546         u32 d3_sts[TELEM_IOSS_DX_D0IX_EVTS], d0ix_sts[TELEM_IOSS_DX_D0IX_EVTS];
 547         u32 pg_sts[TELEM_IOSS_PG_EVTS], pss_idle[TELEM_PSS_IDLE_EVTS];
 548         struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
 549         u32 s0ix_total_ctr = 0, s0ix_shlw_ctr = 0, s0ix_deep_ctr = 0;
 550         u64 s0ix_total_res = 0, s0ix_shlw_res = 0, s0ix_deep_res = 0;
 551         struct telemetry_debugfs_conf *conf = debugfs_conf;
 552         struct pci_dev *dev = NULL;
 553         int index, idx, ret;
 554         u32 d3_state;
 555         u16 pmcsr;
 556
 557         ret = telemetry_read_eventlog(TELEM_IOSS, evtlog,
 558                                       TELEM_MAX_OS_ALLOCATED_EVENTS);
 559         if (ret < 0)
 560                 return ret;
 561
 562         for (index = 0; index < ret; index++) {
 563                 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_d3_id,
 564                                            conf->ioss_d0ix_evts,
 565                                            d3_sts, evtlog[index].telem_evtlog,
 566                                            conf->ioss_d0ix_data,
 567                                            TELEM_MASK_BIT);
 568
 569                 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_pg_id, conf->ioss_pg_evts,
 570                                            pg_sts, evtlog[index].telem_evtlog,
 571                                            conf->ioss_pg_data, TELEM_MASK_BIT);
 572
 573                 TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_d0ix_id,
 574                                            conf->ioss_d0ix_evts,
 575                                            d0ix_sts, evtlog[index].telem_evtlog,
 576                                            conf->ioss_d0ix_data,
 577                                            TELEM_MASK_BIT);
 578
 579                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_total_occ_id,
 580                                            s0ix_total_ctr);
 581
 582                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
 583                                            s0ix_shlw_ctr);
 584
 585                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
 586                                            s0ix_deep_ctr);
 587
 588                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_total_res_id,
 589                                            s0ix_total_res);
 590
 591                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
 592                                            s0ix_shlw_res);
 593
 594                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
 595                                            s0ix_deep_res);
 596         }
 597
 598         seq_puts(s, "\n---------------------------------------------------\n");
 599         seq_puts(s, "S0IX Type\t\t\t Occurrence\t\t Residency(us)\n");
 600         seq_puts(s, "---------------------------------------------------\n");
 601
 602         seq_printf(s, "S0IX Shallow\t\t\t %10u\t %10llu\n",
 603                    s0ix_shlw_ctr -
 604                    conf->suspend_stats.shlw_ctr -
 605                    conf->suspend_stats.shlw_swake_ctr,
 606                    (u64)((s0ix_shlw_res -
 607                    conf->suspend_stats.shlw_res -
 608                    conf->suspend_stats.shlw_swake_res)*10/192));
 609
 610         seq_printf(s, "S0IX Deep\t\t\t %10u\t %10llu\n",
 611                    s0ix_deep_ctr -
 612                    conf->suspend_stats.deep_ctr -
 613                    conf->suspend_stats.deep_swake_ctr,
 614                    (u64)((s0ix_deep_res -
 615                    conf->suspend_stats.deep_res -
 616                    conf->suspend_stats.deep_swake_res)*10/192));
 617
 618         seq_printf(s, "Suspend(With S0ixShallow)\t %10u\t %10llu\n",
 619                    conf->suspend_stats.shlw_ctr,
 620                    (u64)(conf->suspend_stats.shlw_res*10)/192);
 621
 622         seq_printf(s, "Suspend(With S0ixDeep)\t\t %10u\t %10llu\n",
 623                    conf->suspend_stats.deep_ctr,
 624                    (u64)(conf->suspend_stats.deep_res*10)/192);
 625
 626         seq_printf(s, "Suspend(With Shallow-Wakes)\t %10u\t %10llu\n",
 627                    conf->suspend_stats.shlw_swake_ctr +
 628                    conf->suspend_stats.deep_swake_ctr,
 629                    (u64)((conf->suspend_stats.shlw_swake_res +
 630                    conf->suspend_stats.deep_swake_res)*10/192));
 631
 632         seq_printf(s, "S0IX+Suspend Total\t\t %10u\t %10llu\n", s0ix_total_ctr,
 633                                 (u64)(s0ix_total_res*10/192));
 634         seq_puts(s, "\n-------------------------------------------------\n");
 635         seq_puts(s, "\t\tDEVICE STATES\n");
 636         seq_puts(s, "-------------------------------------------------\n");
 637
 638         for_each_pci_dev(dev) {
 639                 pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr);
 640                 d3_state = ((pmcsr & PCI_PM_CTRL_STATE_MASK) ==
 641                             (__force int)PCI_D3hot) ? 1 : 0;
 642
 643                 seq_printf(s, "pci %04x %04X %s %20.20s: ",
 644                            dev->vendor, dev->device, dev_name(&dev->dev),
 645                            dev_driver_string(&dev->dev));
 646                 seq_printf(s, " d3:%x\n", d3_state);
 647         }
 648
 649         seq_puts(s, "\n--------------------------------------\n");
 650         seq_puts(s, "D3/D0i3 Status\n");
 651         seq_puts(s, "--------------------------------------\n");
 652         seq_puts(s, "Block\t\t D3\t D0i3\n");
 653         for (index = 0; index < conf->ioss_d0ix_evts; index++) {
 654                 seq_printf(s, "%-10s\t %u\t %u\n",
 655                            conf->ioss_d0ix_data[index].name,
 656                            d3_sts[index], d0ix_sts[index]);
 657         }
 658
 659         seq_puts(s, "\n--------------------------------------\n");
 660         seq_puts(s, "South Complex PowerGate Status\n");
 661         seq_puts(s, "--------------------------------------\n");
 662         seq_puts(s, "Device\t\t PG\n");
 663         for (index = 0; index < conf->ioss_pg_evts; index++) {
 664                 seq_printf(s, "%-10s\t %u\n",
 665                            conf->ioss_pg_data[index].name,
 666                            pg_sts[index]);
 667         }
 668
 669         evtlog->telem_evtid = conf->pss_idle_id;
 670         ret = telemetry_read_events(TELEM_PSS, evtlog, 1);
 671         if (ret < 0)
 672                 return ret;
 673
 674         seq_puts(s, "\n-----------------------------------------\n");
 675         seq_puts(s, "North Idle Status\n");
 676         seq_puts(s, "-----------------------------------------\n");
 677         for (idx = 0; idx < conf->pss_idle_evts - 1; idx++) {
 678                 pss_idle[idx] = (evtlog->telem_evtlog >>
 679                                 conf->pss_idle_data[idx].bit_pos) &
 680                                 TELEM_MASK_BIT;
 681         }
 682
 683         pss_idle[idx] = (evtlog->telem_evtlog >>
 684                         conf->pss_idle_data[idx].bit_pos) &
 685                         TELEM_APL_MASK_PCS_STATE;
 686
 687         for (index = 0; index < conf->pss_idle_evts; index++) {
 688                 seq_printf(s, "%-30s %u\n",
 689                            conf->pss_idle_data[index].name,
 690                            pss_idle[index]);
 691         }
 692
 693         seq_puts(s, "\nPCS_STATUS Code\n");
 694         seq_puts(s, "0:C0 1:C1 2:C1_DN_WT_DEV 3:C2 4:C2_WT_DE_MEM_UP\n");
 695         seq_puts(s, "5:C2_WT_DE_MEM_DOWN 6:C2_UP_WT_DEV 7:C2_DN 8:C2_VOA\n");
 696         seq_puts(s, "9:C2_VOA_UP 10:S0IX_PRE 11:S0IX\n");
 697
 698         return 0;
 699 }
 700
 701 static int telem_soc_state_open(struct inode *inode, struct file *file)
 702 {
 703         return single_open(file, telem_soc_states_show, inode->i_private);
 704 }
 705
 706 static const struct file_operations telem_socstate_ops = {
 707         .open           = telem_soc_state_open,
 708         .read           = seq_read,
 709         .llseek         = seq_lseek,
 710         .release        = single_release,
 711 };
 712
 713 static int telem_s0ix_res_get(void *data, u64 *val)
 714 {
 715         u64 s0ix_total_res;
 716         int ret;
 717
 718         ret = intel_pmc_s0ix_counter_read(&s0ix_total_res);
 719         if (ret) {
 720                 pr_err("Failed to read S0ix residency");
 721                 return ret;
 722         }
 723
 724         *val = s0ix_total_res;
 725
 726         return 0;
 727 }
 728
 729 DEFINE_DEBUGFS_ATTRIBUTE(telem_s0ix_fops, telem_s0ix_res_get, NULL, "%llu\n");
 730
 731 static int telem_pss_trc_verb_show(struct seq_file *s, void *unused)
 732 {
 733         u32 verbosity;
 734         int err;
 735
 736         err = telemetry_get_trace_verbosity(TELEM_PSS, &verbosity);
 737         if (err) {
 738                 pr_err("Get PSS Trace Verbosity Failed with Error %d\n", err);
 739                 return -EFAULT;
 740         }
 741
 742         seq_printf(s, "PSS Trace Verbosity %u\n", verbosity);
 743         return 0;
 744 }
 745
 746 static ssize_t telem_pss_trc_verb_write(struct file *file,
 747                                         const char __user *userbuf,
 748                                         size_t count, loff_t *ppos)
 749 {
 750         u32 verbosity;
 751         int err;
 752
 753         if (kstrtou32_from_user(userbuf, count, 0, &verbosity))
 754                 return -EFAULT;
 755
 756         err = telemetry_set_trace_verbosity(TELEM_PSS, verbosity);
 757         if (err) {
 758                 pr_err("Changing PSS Trace Verbosity Failed. Error %d\n", err);
 759                 count = err;
 760         }
 761
 762         return count;
 763 }
 764
 765 static int telem_pss_trc_verb_open(struct inode *inode, struct file *file)
 766 {
 767         return single_open(file, telem_pss_trc_verb_show, inode->i_private);
 768 }
 769
 770 static const struct file_operations telem_pss_trc_verb_ops = {
 771         .open           = telem_pss_trc_verb_open,
 772         .read           = seq_read,
 773         .write          = telem_pss_trc_verb_write,
 774         .llseek         = seq_lseek,
 775         .release        = single_release,
 776 };
 777
 778
 779 static int telem_ioss_trc_verb_show(struct seq_file *s, void *unused)
 780 {
 781         u32 verbosity;
 782         int err;
 783
 784         err = telemetry_get_trace_verbosity(TELEM_IOSS, &verbosity);
 785         if (err) {
 786                 pr_err("Get IOSS Trace Verbosity Failed with Error %d\n", err);
 787                 return -EFAULT;
 788         }
 789
 790         seq_printf(s, "IOSS Trace Verbosity %u\n", verbosity);
 791         return 0;
 792 }
 793
 794 static ssize_t telem_ioss_trc_verb_write(struct file *file,
 795                                          const char __user *userbuf,
 796                                          size_t count, loff_t *ppos)
 797 {
 798         u32 verbosity;
 799         int err;
 800
 801         if (kstrtou32_from_user(userbuf, count, 0, &verbosity))
 802                 return -EFAULT;
 803
 804         err = telemetry_set_trace_verbosity(TELEM_IOSS, verbosity);
 805         if (err) {
 806                 pr_err("Changing IOSS Trace Verbosity Failed. Error %d\n", err);
 807                 count = err;
 808         }
 809
 810         return count;
 811 }
 812
 813 static int telem_ioss_trc_verb_open(struct inode *inode, struct file *file)
 814 {
 815         return single_open(file, telem_ioss_trc_verb_show, inode->i_private);
 816 }
 817
 818 static const struct file_operations telem_ioss_trc_verb_ops = {
 819         .open           = telem_ioss_trc_verb_open,
 820         .read           = seq_read,
 821         .write          = telem_ioss_trc_verb_write,
 822         .llseek         = seq_lseek,
 823         .release        = single_release,
 824 };
 825
 826 static int pm_suspend_prep_cb(void)
 827 {
 828         struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
 829         struct telemetry_debugfs_conf *conf = debugfs_conf;
 830         int ret, index;
 831
 832         ret = telemetry_raw_read_eventlog(TELEM_IOSS, evtlog,
 833                         TELEM_MAX_OS_ALLOCATED_EVENTS);
 834         if (ret < 0) {
 835                 suspend_prep_ok = 0;
 836                 goto out;
 837         }
 838
 839         for (index = 0; index < ret; index++) {
 840
 841                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
 842                                            suspend_shlw_ctr_temp);
 843
 844                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
 845                                            suspend_deep_ctr_temp);
 846
 847                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
 848                                            suspend_shlw_res_temp);
 849
 850                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
 851                                            suspend_deep_res_temp);
 852         }
 853         suspend_prep_ok = 1;
 854 out:
 855         return NOTIFY_OK;
 856 }
 857
 858 static int pm_suspend_exit_cb(void)
 859 {
 860         struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
 861         static u32 suspend_shlw_ctr_exit, suspend_deep_ctr_exit;
 862         static u64 suspend_shlw_res_exit, suspend_deep_res_exit;
 863         struct telemetry_debugfs_conf *conf = debugfs_conf;
 864         int ret, index;
 865
 866         if (!suspend_prep_ok)
 867                 goto out;
 868
 869         ret = telemetry_raw_read_eventlog(TELEM_IOSS, evtlog,
 870                                           TELEM_MAX_OS_ALLOCATED_EVENTS);
 871         if (ret < 0)
 872                 goto out;
 873
 874         for (index = 0; index < ret; index++) {
 875                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
 876                                            suspend_shlw_ctr_exit);
 877
 878                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
 879                                            suspend_deep_ctr_exit);
 880
 881                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
 882                                            suspend_shlw_res_exit);
 883
 884                 TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
 885                                            suspend_deep_res_exit);
 886         }
 887
 888         if ((suspend_shlw_ctr_exit < suspend_shlw_ctr_temp) ||
 889             (suspend_deep_ctr_exit < suspend_deep_ctr_temp) ||
 890             (suspend_shlw_res_exit < suspend_shlw_res_temp) ||
 891             (suspend_deep_res_exit < suspend_deep_res_temp)) {
 892                 pr_err("Wrong s0ix counters detected\n");
 893                 goto out;
 894         }
 895
 896         suspend_shlw_ctr_exit -= suspend_shlw_ctr_temp;
 897         suspend_deep_ctr_exit -= suspend_deep_ctr_temp;
 898         suspend_shlw_res_exit -= suspend_shlw_res_temp;
 899         suspend_deep_res_exit -= suspend_deep_res_temp;
 900
 901         if (suspend_shlw_ctr_exit == 1) {
 902                 conf->suspend_stats.shlw_ctr +=
 903                 suspend_shlw_ctr_exit;
 904
 905                 conf->suspend_stats.shlw_res +=
 906                 suspend_shlw_res_exit;
 907         }
 908         /* Shallow Wakes Case */
 909         else if (suspend_shlw_ctr_exit > 1) {
 910                 conf->suspend_stats.shlw_swake_ctr +=
 911                 suspend_shlw_ctr_exit;
 912
 913                 conf->suspend_stats.shlw_swake_res +=
 914                 suspend_shlw_res_exit;
 915         }
 916
 917         if (suspend_deep_ctr_exit == 1) {
 918                 conf->suspend_stats.deep_ctr +=
 919                 suspend_deep_ctr_exit;
 920
 921                 conf->suspend_stats.deep_res +=
 922                 suspend_deep_res_exit;
 923         }
 924
 925         /* Shallow Wakes Case */
 926         else if (suspend_deep_ctr_exit > 1) {
 927                 conf->suspend_stats.deep_swake_ctr +=
 928                 suspend_deep_ctr_exit;
 929
 930                 conf->suspend_stats.deep_swake_res +=
 931                 suspend_deep_res_exit;
 932         }
 933
 934 out:
 935         suspend_prep_ok = 0;
 936         return NOTIFY_OK;
 937 }
 938
 939 static int pm_notification(struct notifier_block *this,
 940                            unsigned long event, void *ptr)
 941 {
 942         switch (event) {
 943         case PM_SUSPEND_PREPARE:
 944                 return pm_suspend_prep_cb();
 945         case PM_POST_SUSPEND:
 946                 return pm_suspend_exit_cb();
 947         }
 948
 949         return NOTIFY_DONE;
 950 }
 951
 952 static struct notifier_block pm_notifier = {
 953         .notifier_call = pm_notification,
 954 };
 955
 956 static int __init telemetry_debugfs_init(void)
 957 {
 958         const struct x86_cpu_id *id;
 959         int err;
 960         struct dentry *f;
 961
 962         /* Only APL supported for now */
 963         id = x86_match_cpu(telemetry_debugfs_cpu_ids);
 964         if (!id)
 965                 return -ENODEV;
 966
 967         debugfs_conf = (struct telemetry_debugfs_conf *)id->driver_data;
 968
 969         err = telemetry_pltconfig_valid();
 970         if (err < 0)
 971                 return -ENODEV;
 972
 973         err = telemetry_debugfs_check_evts();
 974         if (err < 0)
 975                 return -EINVAL;
 976
 977         register_pm_notifier(&pm_notifier);
 978
 979         err = -ENOMEM;
 980         debugfs_conf->telemetry_dbg_dir = debugfs_create_dir("telemetry", NULL);
 981         if (!debugfs_conf->telemetry_dbg_dir)
 982                 goto out_pm;
 983
 984         f = debugfs_create_file("pss_info", S_IFREG | S_IRUGO,
 985                                 debugfs_conf->telemetry_dbg_dir, NULL,
 986                                 &telem_pss_ops);
 987         if (!f) {
 988                 pr_err("pss_sample_info debugfs register failed\n");
 989                 goto out;
 990         }
 991
 992         f = debugfs_create_file("ioss_info", S_IFREG | S_IRUGO,
 993                                 debugfs_conf->telemetry_dbg_dir, NULL,
 994                                 &telem_ioss_ops);
 995         if (!f) {
 996                 pr_err("ioss_sample_info debugfs register failed\n");
 997                 goto out;
 998         }
 999
1000         f = debugfs_create_file("soc_states", S_IFREG | S_IRUGO,
1001                                 debugfs_conf->telemetry_dbg_dir,
1002                                 NULL, &telem_socstate_ops);
1003         if (!f) {
1004                 pr_err("ioss_sample_info debugfs register failed\n");
1005                 goto out;
1006         }
1007
1008         f = debugfs_create_file("s0ix_residency_usec", S_IFREG | S_IRUGO,
1009                                 debugfs_conf->telemetry_dbg_dir,
1010                                 NULL, &telem_s0ix_fops);
1011         if (!f) {
1012                 pr_err("s0ix_residency_usec debugfs register failed\n");
1013                 goto out;
1014         }
1015
1016         f = debugfs_create_file("pss_trace_verbosity", S_IFREG | S_IRUGO,
1017                                 debugfs_conf->telemetry_dbg_dir, NULL,
1018                                 &telem_pss_trc_verb_ops);
1019         if (!f) {
1020                 pr_err("pss_trace_verbosity debugfs register failed\n");
1021                 goto out;
1022         }
1023
1024         f = debugfs_create_file("ioss_trace_verbosity", S_IFREG | S_IRUGO,
1025                                 debugfs_conf->telemetry_dbg_dir, NULL,
1026                                 &telem_ioss_trc_verb_ops);
1027         if (!f) {
1028                 pr_err("ioss_trace_verbosity debugfs register failed\n");
1029                 goto out;
1030         }
1031
1032         return 0;
1033
1034 out:
1035         debugfs_remove_recursive(debugfs_conf->telemetry_dbg_dir);
1036         debugfs_conf->telemetry_dbg_dir = NULL;
1037 out_pm:
1038         unregister_pm_notifier(&pm_notifier);
1039
1040         return err;
1041 }
1042
1043 static void __exit telemetry_debugfs_exit(void)
1044 {
1045         debugfs_remove_recursive(debugfs_conf->telemetry_dbg_dir);
1046         debugfs_conf->telemetry_dbg_dir = NULL;
1047         unregister_pm_notifier(&pm_notifier);
1048 }
1049
1050 late_initcall(telemetry_debugfs_init);
1051 module_exit(telemetry_debugfs_exit);
1052
1053 MODULE_AUTHOR("Souvik Kumar Chakravarty <[email protected]>");
1054 MODULE_DESCRIPTION("Intel SoC Telemetry debugfs Interface");
1055 MODULE_VERSION(DRIVER_VERSION);
1056 MODULE_LICENSE("GPL");