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linuxdebug/drivers/platform/x86/intel/telemetry/debugfs.c

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2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0
/*
* Intel SOC Telemetry debugfs Driver: Currently supports APL
* Copyright (c) 2015, Intel Corporation.
* All Rights Reserved.
*
* This file provides the debugfs interfaces for telemetry.
* /sys/kernel/debug/telemetry/pss_info: Shows Primary Control Sub-Sys Counters
* /sys/kernel/debug/telemetry/ioss_info: Shows IO Sub-System Counters
* /sys/kernel/debug/telemetry/soc_states: Shows SoC State
* /sys/kernel/debug/telemetry/pss_trace_verbosity: Read and Change Tracing
* Verbosity via firmware
* /sys/kernel/debug/telemetry/ioss_race_verbosity: Write and Change Tracing
* Verbosity via firmware
*/
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/mfd/intel_pmc_bxt.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/seq_file.h>
#include <linux/suspend.h>
#include <asm/cpu_device_id.h>
#include <asm/intel-family.h>
#include <asm/intel_telemetry.h>
#define DRIVER_NAME "telemetry_soc_debugfs"
#define DRIVER_VERSION "1.0.0"
/* ApolloLake SoC Event-IDs */
#define TELEM_APL_PSS_PSTATES_ID 0x2802
#define TELEM_APL_PSS_IDLE_ID 0x2806
#define TELEM_APL_PCS_IDLE_BLOCKED_ID 0x2C00
#define TELEM_APL_PCS_S0IX_BLOCKED_ID 0x2C01
#define TELEM_APL_PSS_WAKEUP_ID 0x2C02
#define TELEM_APL_PSS_LTR_BLOCKING_ID 0x2C03
#define TELEM_APL_S0IX_TOTAL_OCC_ID 0x4000
#define TELEM_APL_S0IX_SHLW_OCC_ID 0x4001
#define TELEM_APL_S0IX_DEEP_OCC_ID 0x4002
#define TELEM_APL_S0IX_TOTAL_RES_ID 0x4800
#define TELEM_APL_S0IX_SHLW_RES_ID 0x4801
#define TELEM_APL_S0IX_DEEP_RES_ID 0x4802
#define TELEM_APL_D0IX_ID 0x581A
#define TELEM_APL_D3_ID 0x5819
#define TELEM_APL_PG_ID 0x5818
#define TELEM_INFO_SRAMEVTS_MASK 0xFF00
#define TELEM_INFO_SRAMEVTS_SHIFT 0x8
#define TELEM_SSRAM_READ_TIMEOUT 10
#define TELEM_MASK_BIT 1
#define TELEM_MASK_BYTE 0xFF
#define BYTES_PER_LONG 8
#define TELEM_APL_MASK_PCS_STATE 0xF
/* Max events in bitmap to check for */
#define TELEM_PSS_IDLE_EVTS 25
#define TELEM_PSS_IDLE_BLOCKED_EVTS 20
#define TELEM_PSS_S0IX_BLOCKED_EVTS 20
#define TELEM_PSS_S0IX_WAKEUP_EVTS 20
#define TELEM_PSS_LTR_BLOCKING_EVTS 20
#define TELEM_IOSS_DX_D0IX_EVTS 25
#define TELEM_IOSS_PG_EVTS 30
#define TELEM_CHECK_AND_PARSE_EVTS(EVTID, EVTNUM, BUF, EVTLOG, EVTDAT, MASK) { \
if (evtlog[index].telem_evtid == (EVTID)) { \
for (idx = 0; idx < (EVTNUM); idx++) \
(BUF)[idx] = ((EVTLOG) >> (EVTDAT)[idx].bit_pos) & \
(MASK); \
continue; \
} \
}
#define TELEM_CHECK_AND_PARSE_CTRS(EVTID, CTR) { \
if (evtlog[index].telem_evtid == (EVTID)) { \
(CTR) = evtlog[index].telem_evtlog; \
continue; \
} \
}
static u8 suspend_prep_ok;
static u32 suspend_shlw_ctr_temp, suspend_deep_ctr_temp;
static u64 suspend_shlw_res_temp, suspend_deep_res_temp;
struct telemetry_susp_stats {
u32 shlw_ctr;
u32 deep_ctr;
u64 shlw_res;
u64 deep_res;
};
/* Bitmap definitions for default counters in APL */
struct telem_pss_idle_stateinfo {
const char *name;
u32 bit_pos;
};
static struct telem_pss_idle_stateinfo telem_apl_pss_idle_data[] = {
{"IA_CORE0_C1E", 0},
{"IA_CORE1_C1E", 1},
{"IA_CORE2_C1E", 2},
{"IA_CORE3_C1E", 3},
{"IA_CORE0_C6", 16},
{"IA_CORE1_C6", 17},
{"IA_CORE2_C6", 18},
{"IA_CORE3_C6", 19},
{"IA_MODULE0_C7", 32},
{"IA_MODULE1_C7", 33},
{"GT_RC6", 40},
{"IUNIT_PROCESSING_IDLE", 41},
{"FAR_MEM_IDLE", 43},
{"DISPLAY_IDLE", 44},
{"IUNIT_INPUT_SYSTEM_IDLE", 45},
{"PCS_STATUS", 60},
};
struct telem_pcs_blkd_info {
const char *name;
u32 bit_pos;
};
static struct telem_pcs_blkd_info telem_apl_pcs_idle_blkd_data[] = {
{"COMPUTE", 0},
{"MISC", 8},
{"MODULE_ACTIONS_PENDING", 16},
{"LTR", 24},
{"DISPLAY_WAKE", 32},
{"ISP_WAKE", 40},
{"PSF0_ACTIVE", 48},
};
static struct telem_pcs_blkd_info telem_apl_pcs_s0ix_blkd_data[] = {
{"LTR", 0},
{"IRTL", 8},
{"WAKE_DEADLINE_PENDING", 16},
{"DISPLAY", 24},
{"ISP", 32},
{"CORE", 40},
{"PMC", 48},
{"MISC", 56},
};
struct telem_pss_ltr_info {
const char *name;
u32 bit_pos;
};
static struct telem_pss_ltr_info telem_apl_pss_ltr_data[] = {
{"CORE_ACTIVE", 0},
{"MEM_UP", 8},
{"DFX", 16},
{"DFX_FORCE_LTR", 24},
{"DISPLAY", 32},
{"ISP", 40},
{"SOUTH", 48},
};
struct telem_pss_wakeup_info {
const char *name;
u32 bit_pos;
};
static struct telem_pss_wakeup_info telem_apl_pss_wakeup[] = {
{"IP_IDLE", 0},
{"DISPLAY_WAKE", 8},
{"VOLTAGE_REG_INT", 16},
{"DROWSY_TIMER (HOTPLUG)", 24},
{"CORE_WAKE", 32},
{"MISC_S0IX", 40},
{"MISC_ABORT", 56},
};
struct telem_ioss_d0ix_stateinfo {
const char *name;
u32 bit_pos;
};
static struct telem_ioss_d0ix_stateinfo telem_apl_ioss_d0ix_data[] = {
{"CSE", 0},
{"SCC2", 1},
{"GMM", 2},
{"XDCI", 3},
{"XHCI", 4},
{"ISH", 5},
{"AVS", 6},
{"PCIE0P1", 7},
{"PECI0P0", 8},
{"LPSS", 9},
{"SCC", 10},
{"PWM", 11},
{"PCIE1_P3", 12},
{"PCIE1_P2", 13},
{"PCIE1_P1", 14},
{"PCIE1_P0", 15},
{"CNV", 16},
{"SATA", 17},
{"PRTC", 18},
};
struct telem_ioss_pg_info {
const char *name;
u32 bit_pos;
};
static struct telem_ioss_pg_info telem_apl_ioss_pg_data[] = {
{"LPSS", 0},
{"SCC", 1},
{"P2SB", 2},
{"SCC2", 3},
{"GMM", 4},
{"PCIE0", 5},
{"XDCI", 6},
{"xHCI", 7},
{"CSE", 8},
{"SPI", 9},
{"AVSPGD4", 10},
{"AVSPGD3", 11},
{"AVSPGD2", 12},
{"AVSPGD1", 13},
{"ISH", 14},
{"EXI", 15},
{"NPKVRC", 16},
{"NPKVNN", 17},
{"CUNIT", 18},
{"FUSE_CTRL", 19},
{"PCIE1", 20},
{"CNV", 21},
{"LPC", 22},
{"SATA", 23},
{"SMB", 24},
{"PRTC", 25},
};
struct telemetry_debugfs_conf {
struct telemetry_susp_stats suspend_stats;
struct dentry *telemetry_dbg_dir;
/* Bitmap Data */
struct telem_ioss_d0ix_stateinfo *ioss_d0ix_data;
struct telem_pss_idle_stateinfo *pss_idle_data;
struct telem_pcs_blkd_info *pcs_idle_blkd_data;
struct telem_pcs_blkd_info *pcs_s0ix_blkd_data;
struct telem_pss_wakeup_info *pss_wakeup;
struct telem_pss_ltr_info *pss_ltr_data;
struct telem_ioss_pg_info *ioss_pg_data;
u8 pcs_idle_blkd_evts;
u8 pcs_s0ix_blkd_evts;
u8 pss_wakeup_evts;
u8 pss_idle_evts;
u8 pss_ltr_evts;
u8 ioss_d0ix_evts;
u8 ioss_pg_evts;
/* IDs */
u16 pss_ltr_blocking_id;
u16 pcs_idle_blkd_id;
u16 pcs_s0ix_blkd_id;
u16 s0ix_total_occ_id;
u16 s0ix_shlw_occ_id;
u16 s0ix_deep_occ_id;
u16 s0ix_total_res_id;
u16 s0ix_shlw_res_id;
u16 s0ix_deep_res_id;
u16 pss_wakeup_id;
u16 ioss_d0ix_id;
u16 pstates_id;
u16 pss_idle_id;
u16 ioss_d3_id;
u16 ioss_pg_id;
};
static struct telemetry_debugfs_conf *debugfs_conf;
static struct telemetry_debugfs_conf telem_apl_debugfs_conf = {
.pss_idle_data = telem_apl_pss_idle_data,
.pcs_idle_blkd_data = telem_apl_pcs_idle_blkd_data,
.pcs_s0ix_blkd_data = telem_apl_pcs_s0ix_blkd_data,
.pss_ltr_data = telem_apl_pss_ltr_data,
.pss_wakeup = telem_apl_pss_wakeup,
.ioss_d0ix_data = telem_apl_ioss_d0ix_data,
.ioss_pg_data = telem_apl_ioss_pg_data,
.pss_idle_evts = ARRAY_SIZE(telem_apl_pss_idle_data),
.pcs_idle_blkd_evts = ARRAY_SIZE(telem_apl_pcs_idle_blkd_data),
.pcs_s0ix_blkd_evts = ARRAY_SIZE(telem_apl_pcs_s0ix_blkd_data),
.pss_ltr_evts = ARRAY_SIZE(telem_apl_pss_ltr_data),
.pss_wakeup_evts = ARRAY_SIZE(telem_apl_pss_wakeup),
.ioss_d0ix_evts = ARRAY_SIZE(telem_apl_ioss_d0ix_data),
.ioss_pg_evts = ARRAY_SIZE(telem_apl_ioss_pg_data),
.pstates_id = TELEM_APL_PSS_PSTATES_ID,
.pss_idle_id = TELEM_APL_PSS_IDLE_ID,
.pcs_idle_blkd_id = TELEM_APL_PCS_IDLE_BLOCKED_ID,
.pcs_s0ix_blkd_id = TELEM_APL_PCS_S0IX_BLOCKED_ID,
.pss_wakeup_id = TELEM_APL_PSS_WAKEUP_ID,
.pss_ltr_blocking_id = TELEM_APL_PSS_LTR_BLOCKING_ID,
.s0ix_total_occ_id = TELEM_APL_S0IX_TOTAL_OCC_ID,
.s0ix_shlw_occ_id = TELEM_APL_S0IX_SHLW_OCC_ID,
.s0ix_deep_occ_id = TELEM_APL_S0IX_DEEP_OCC_ID,
.s0ix_total_res_id = TELEM_APL_S0IX_TOTAL_RES_ID,
.s0ix_shlw_res_id = TELEM_APL_S0IX_SHLW_RES_ID,
.s0ix_deep_res_id = TELEM_APL_S0IX_DEEP_RES_ID,
.ioss_d0ix_id = TELEM_APL_D0IX_ID,
.ioss_d3_id = TELEM_APL_D3_ID,
.ioss_pg_id = TELEM_APL_PG_ID,
};
static const struct x86_cpu_id telemetry_debugfs_cpu_ids[] = {
X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT, &telem_apl_debugfs_conf),
X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT_PLUS, &telem_apl_debugfs_conf),
{}
};
MODULE_DEVICE_TABLE(x86cpu, telemetry_debugfs_cpu_ids);
static int telemetry_debugfs_check_evts(void)
{
if ((debugfs_conf->pss_idle_evts > TELEM_PSS_IDLE_EVTS) ||
(debugfs_conf->pcs_idle_blkd_evts > TELEM_PSS_IDLE_BLOCKED_EVTS) ||
(debugfs_conf->pcs_s0ix_blkd_evts > TELEM_PSS_S0IX_BLOCKED_EVTS) ||
(debugfs_conf->pss_ltr_evts > TELEM_PSS_LTR_BLOCKING_EVTS) ||
(debugfs_conf->pss_wakeup_evts > TELEM_PSS_S0IX_WAKEUP_EVTS) ||
(debugfs_conf->ioss_d0ix_evts > TELEM_IOSS_DX_D0IX_EVTS) ||
(debugfs_conf->ioss_pg_evts > TELEM_IOSS_PG_EVTS))
return -EINVAL;
return 0;
}
static int telem_pss_states_show(struct seq_file *s, void *unused)
{
struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
struct telemetry_debugfs_conf *conf = debugfs_conf;
const char *name[TELEM_MAX_OS_ALLOCATED_EVENTS];
u32 pcs_idle_blkd[TELEM_PSS_IDLE_BLOCKED_EVTS],
pcs_s0ix_blkd[TELEM_PSS_S0IX_BLOCKED_EVTS],
pss_s0ix_wakeup[TELEM_PSS_S0IX_WAKEUP_EVTS],
pss_ltr_blkd[TELEM_PSS_LTR_BLOCKING_EVTS],
pss_idle[TELEM_PSS_IDLE_EVTS];
int index, idx, ret, err = 0;
u64 pstates = 0;
ret = telemetry_read_eventlog(TELEM_PSS, evtlog,
TELEM_MAX_OS_ALLOCATED_EVENTS);
if (ret < 0)
return ret;
err = telemetry_get_evtname(TELEM_PSS, name,
TELEM_MAX_OS_ALLOCATED_EVENTS);
if (err < 0)
return err;
seq_puts(s, "\n----------------------------------------------------\n");
seq_puts(s, "\tPSS TELEM EVENTLOG (Residency = field/19.2 us\n");
seq_puts(s, "----------------------------------------------------\n");
for (index = 0; index < ret; index++) {
seq_printf(s, "%-32s %llu\n",
name[index], evtlog[index].telem_evtlog);
/* Fetch PSS IDLE State */
if (evtlog[index].telem_evtid == conf->pss_idle_id) {
pss_idle[conf->pss_idle_evts - 1] =
(evtlog[index].telem_evtlog >>
conf->pss_idle_data[conf->pss_idle_evts - 1].bit_pos) &
TELEM_APL_MASK_PCS_STATE;
}
TELEM_CHECK_AND_PARSE_EVTS(conf->pss_idle_id,
conf->pss_idle_evts - 1,
pss_idle, evtlog[index].telem_evtlog,
conf->pss_idle_data, TELEM_MASK_BIT);
TELEM_CHECK_AND_PARSE_EVTS(conf->pcs_idle_blkd_id,
conf->pcs_idle_blkd_evts,
pcs_idle_blkd,
evtlog[index].telem_evtlog,
conf->pcs_idle_blkd_data,
TELEM_MASK_BYTE);
TELEM_CHECK_AND_PARSE_EVTS(conf->pcs_s0ix_blkd_id,
conf->pcs_s0ix_blkd_evts,
pcs_s0ix_blkd,
evtlog[index].telem_evtlog,
conf->pcs_s0ix_blkd_data,
TELEM_MASK_BYTE);
TELEM_CHECK_AND_PARSE_EVTS(conf->pss_wakeup_id,
conf->pss_wakeup_evts,
pss_s0ix_wakeup,
evtlog[index].telem_evtlog,
conf->pss_wakeup, TELEM_MASK_BYTE);
TELEM_CHECK_AND_PARSE_EVTS(conf->pss_ltr_blocking_id,
conf->pss_ltr_evts, pss_ltr_blkd,
evtlog[index].telem_evtlog,
conf->pss_ltr_data, TELEM_MASK_BYTE);
if (evtlog[index].telem_evtid == debugfs_conf->pstates_id)
pstates = evtlog[index].telem_evtlog;
}
seq_puts(s, "\n--------------------------------------\n");
seq_puts(s, "PStates\n");
seq_puts(s, "--------------------------------------\n");
seq_puts(s, "Domain\t\t\t\tFreq(Mhz)\n");
seq_printf(s, " IA\t\t\t\t %llu\n GT\t\t\t\t %llu\n",
(pstates & TELEM_MASK_BYTE)*100,
((pstates >> 8) & TELEM_MASK_BYTE)*50/3);
seq_printf(s, " IUNIT\t\t\t\t %llu\n SA\t\t\t\t %llu\n",
((pstates >> 16) & TELEM_MASK_BYTE)*25,
((pstates >> 24) & TELEM_MASK_BYTE)*50/3);
seq_puts(s, "\n--------------------------------------\n");
seq_puts(s, "PSS IDLE Status\n");
seq_puts(s, "--------------------------------------\n");
seq_puts(s, "Device\t\t\t\t\tIDLE\n");
for (index = 0; index < debugfs_conf->pss_idle_evts; index++) {
seq_printf(s, "%-32s\t%u\n",
debugfs_conf->pss_idle_data[index].name,
pss_idle[index]);
}
seq_puts(s, "\n--------------------------------------\n");
seq_puts(s, "PSS Idle blkd Status (~1ms saturating bucket)\n");
seq_puts(s, "--------------------------------------\n");
seq_puts(s, "Blocker\t\t\t\t\tCount\n");
for (index = 0; index < debugfs_conf->pcs_idle_blkd_evts; index++) {
seq_printf(s, "%-32s\t%u\n",
debugfs_conf->pcs_idle_blkd_data[index].name,
pcs_idle_blkd[index]);
}
seq_puts(s, "\n--------------------------------------\n");
seq_puts(s, "PSS S0ix blkd Status (~1ms saturating bucket)\n");
seq_puts(s, "--------------------------------------\n");
seq_puts(s, "Blocker\t\t\t\t\tCount\n");
for (index = 0; index < debugfs_conf->pcs_s0ix_blkd_evts; index++) {
seq_printf(s, "%-32s\t%u\n",
debugfs_conf->pcs_s0ix_blkd_data[index].name,
pcs_s0ix_blkd[index]);
}
seq_puts(s, "\n--------------------------------------\n");
seq_puts(s, "LTR Blocking Status (~1ms saturating bucket)\n");
seq_puts(s, "--------------------------------------\n");
seq_puts(s, "Blocker\t\t\t\t\tCount\n");
for (index = 0; index < debugfs_conf->pss_ltr_evts; index++) {
seq_printf(s, "%-32s\t%u\n",
debugfs_conf->pss_ltr_data[index].name,
pss_s0ix_wakeup[index]);
}
seq_puts(s, "\n--------------------------------------\n");
seq_puts(s, "Wakes Status (~1ms saturating bucket)\n");
seq_puts(s, "--------------------------------------\n");
seq_puts(s, "Wakes\t\t\t\t\tCount\n");
for (index = 0; index < debugfs_conf->pss_wakeup_evts; index++) {
seq_printf(s, "%-32s\t%u\n",
debugfs_conf->pss_wakeup[index].name,
pss_ltr_blkd[index]);
}
return 0;
}
DEFINE_SHOW_ATTRIBUTE(telem_pss_states);
static int telem_ioss_states_show(struct seq_file *s, void *unused)
{
struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
const char *name[TELEM_MAX_OS_ALLOCATED_EVENTS];
int index, ret, err;
ret = telemetry_read_eventlog(TELEM_IOSS, evtlog,
TELEM_MAX_OS_ALLOCATED_EVENTS);
if (ret < 0)
return ret;
err = telemetry_get_evtname(TELEM_IOSS, name,
TELEM_MAX_OS_ALLOCATED_EVENTS);
if (err < 0)
return err;
seq_puts(s, "--------------------------------------\n");
seq_puts(s, "\tI0SS TELEMETRY EVENTLOG\n");
seq_puts(s, "--------------------------------------\n");
for (index = 0; index < ret; index++) {
seq_printf(s, "%-32s 0x%llx\n",
name[index], evtlog[index].telem_evtlog);
}
return 0;
}
DEFINE_SHOW_ATTRIBUTE(telem_ioss_states);
static int telem_soc_states_show(struct seq_file *s, void *unused)
{
u32 d3_sts[TELEM_IOSS_DX_D0IX_EVTS], d0ix_sts[TELEM_IOSS_DX_D0IX_EVTS];
u32 pg_sts[TELEM_IOSS_PG_EVTS], pss_idle[TELEM_PSS_IDLE_EVTS];
struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
u32 s0ix_total_ctr = 0, s0ix_shlw_ctr = 0, s0ix_deep_ctr = 0;
u64 s0ix_total_res = 0, s0ix_shlw_res = 0, s0ix_deep_res = 0;
struct telemetry_debugfs_conf *conf = debugfs_conf;
struct pci_dev *dev = NULL;
int index, idx, ret;
u32 d3_state;
u16 pmcsr;
ret = telemetry_read_eventlog(TELEM_IOSS, evtlog,
TELEM_MAX_OS_ALLOCATED_EVENTS);
if (ret < 0)
return ret;
for (index = 0; index < ret; index++) {
TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_d3_id,
conf->ioss_d0ix_evts,
d3_sts, evtlog[index].telem_evtlog,
conf->ioss_d0ix_data,
TELEM_MASK_BIT);
TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_pg_id, conf->ioss_pg_evts,
pg_sts, evtlog[index].telem_evtlog,
conf->ioss_pg_data, TELEM_MASK_BIT);
TELEM_CHECK_AND_PARSE_EVTS(conf->ioss_d0ix_id,
conf->ioss_d0ix_evts,
d0ix_sts, evtlog[index].telem_evtlog,
conf->ioss_d0ix_data,
TELEM_MASK_BIT);
TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_total_occ_id,
s0ix_total_ctr);
TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
s0ix_shlw_ctr);
TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
s0ix_deep_ctr);
TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_total_res_id,
s0ix_total_res);
TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
s0ix_shlw_res);
TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
s0ix_deep_res);
}
seq_puts(s, "\n---------------------------------------------------\n");
seq_puts(s, "S0IX Type\t\t\t Occurrence\t\t Residency(us)\n");
seq_puts(s, "---------------------------------------------------\n");
seq_printf(s, "S0IX Shallow\t\t\t %10u\t %10llu\n",
s0ix_shlw_ctr -
conf->suspend_stats.shlw_ctr,
(u64)((s0ix_shlw_res -
conf->suspend_stats.shlw_res)*10/192));
seq_printf(s, "S0IX Deep\t\t\t %10u\t %10llu\n",
s0ix_deep_ctr -
conf->suspend_stats.deep_ctr,
(u64)((s0ix_deep_res -
conf->suspend_stats.deep_res)*10/192));
seq_printf(s, "Suspend(With S0ixShallow)\t %10u\t %10llu\n",
conf->suspend_stats.shlw_ctr,
(u64)(conf->suspend_stats.shlw_res*10)/192);
seq_printf(s, "Suspend(With S0ixDeep)\t\t %10u\t %10llu\n",
conf->suspend_stats.deep_ctr,
(u64)(conf->suspend_stats.deep_res*10)/192);
seq_printf(s, "TOTAL S0IX\t\t\t %10u\t %10llu\n", s0ix_total_ctr,
(u64)(s0ix_total_res*10/192));
seq_puts(s, "\n-------------------------------------------------\n");
seq_puts(s, "\t\tDEVICE STATES\n");
seq_puts(s, "-------------------------------------------------\n");
for_each_pci_dev(dev) {
pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr);
d3_state = ((pmcsr & PCI_PM_CTRL_STATE_MASK) ==
(__force int)PCI_D3hot) ? 1 : 0;
seq_printf(s, "pci %04x %04X %s %20.20s: ",
dev->vendor, dev->device, dev_name(&dev->dev),
dev_driver_string(&dev->dev));
seq_printf(s, " d3:%x\n", d3_state);
}
seq_puts(s, "\n--------------------------------------\n");
seq_puts(s, "D3/D0i3 Status\n");
seq_puts(s, "--------------------------------------\n");
seq_puts(s, "Block\t\t D3\t D0i3\n");
for (index = 0; index < conf->ioss_d0ix_evts; index++) {
seq_printf(s, "%-10s\t %u\t %u\n",
conf->ioss_d0ix_data[index].name,
d3_sts[index], d0ix_sts[index]);
}
seq_puts(s, "\n--------------------------------------\n");
seq_puts(s, "South Complex PowerGate Status\n");
seq_puts(s, "--------------------------------------\n");
seq_puts(s, "Device\t\t PG\n");
for (index = 0; index < conf->ioss_pg_evts; index++) {
seq_printf(s, "%-10s\t %u\n",
conf->ioss_pg_data[index].name,
pg_sts[index]);
}
evtlog->telem_evtid = conf->pss_idle_id;
ret = telemetry_read_events(TELEM_PSS, evtlog, 1);
if (ret < 0)
return ret;
seq_puts(s, "\n-----------------------------------------\n");
seq_puts(s, "North Idle Status\n");
seq_puts(s, "-----------------------------------------\n");
for (idx = 0; idx < conf->pss_idle_evts - 1; idx++) {
pss_idle[idx] = (evtlog->telem_evtlog >>
conf->pss_idle_data[idx].bit_pos) &
TELEM_MASK_BIT;
}
pss_idle[idx] = (evtlog->telem_evtlog >>
conf->pss_idle_data[idx].bit_pos) &
TELEM_APL_MASK_PCS_STATE;
for (index = 0; index < conf->pss_idle_evts; index++) {
seq_printf(s, "%-30s %u\n",
conf->pss_idle_data[index].name,
pss_idle[index]);
}
seq_puts(s, "\nPCS_STATUS Code\n");
seq_puts(s, "0:C0 1:C1 2:C1_DN_WT_DEV 3:C2 4:C2_WT_DE_MEM_UP\n");
seq_puts(s, "5:C2_WT_DE_MEM_DOWN 6:C2_UP_WT_DEV 7:C2_DN 8:C2_VOA\n");
seq_puts(s, "9:C2_VOA_UP 10:S0IX_PRE 11:S0IX\n");
return 0;
}
DEFINE_SHOW_ATTRIBUTE(telem_soc_states);
static int telem_s0ix_res_get(void *data, u64 *val)
{
struct telemetry_plt_config *plt_config = telemetry_get_pltdata();
u64 s0ix_total_res;
int ret;
ret = intel_pmc_s0ix_counter_read(plt_config->pmc, &s0ix_total_res);
if (ret) {
pr_err("Failed to read S0ix residency");
return ret;
}
*val = s0ix_total_res;
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(telem_s0ix_fops, telem_s0ix_res_get, NULL, "%llu\n");
static int telem_pss_trc_verb_show(struct seq_file *s, void *unused)
{
u32 verbosity;
int err;
err = telemetry_get_trace_verbosity(TELEM_PSS, &verbosity);
if (err) {
pr_err("Get PSS Trace Verbosity Failed with Error %d\n", err);
return -EFAULT;
}
seq_printf(s, "PSS Trace Verbosity %u\n", verbosity);
return 0;
}
static ssize_t telem_pss_trc_verb_write(struct file *file,
const char __user *userbuf,
size_t count, loff_t *ppos)
{
u32 verbosity;
int err;
err = kstrtou32_from_user(userbuf, count, 0, &verbosity);
if (err)
return err;
err = telemetry_set_trace_verbosity(TELEM_PSS, verbosity);
if (err) {
pr_err("Changing PSS Trace Verbosity Failed. Error %d\n", err);
return err;
}
return count;
}
static int telem_pss_trc_verb_open(struct inode *inode, struct file *file)
{
return single_open(file, telem_pss_trc_verb_show, inode->i_private);
}
static const struct file_operations telem_pss_trc_verb_ops = {
.open = telem_pss_trc_verb_open,
.read = seq_read,
.write = telem_pss_trc_verb_write,
.llseek = seq_lseek,
.release = single_release,
};
static int telem_ioss_trc_verb_show(struct seq_file *s, void *unused)
{
u32 verbosity;
int err;
err = telemetry_get_trace_verbosity(TELEM_IOSS, &verbosity);
if (err) {
pr_err("Get IOSS Trace Verbosity Failed with Error %d\n", err);
return -EFAULT;
}
seq_printf(s, "IOSS Trace Verbosity %u\n", verbosity);
return 0;
}
static ssize_t telem_ioss_trc_verb_write(struct file *file,
const char __user *userbuf,
size_t count, loff_t *ppos)
{
u32 verbosity;
int err;
err = kstrtou32_from_user(userbuf, count, 0, &verbosity);
if (err)
return err;
err = telemetry_set_trace_verbosity(TELEM_IOSS, verbosity);
if (err) {
pr_err("Changing IOSS Trace Verbosity Failed. Error %d\n", err);
return err;
}
return count;
}
static int telem_ioss_trc_verb_open(struct inode *inode, struct file *file)
{
return single_open(file, telem_ioss_trc_verb_show, inode->i_private);
}
static const struct file_operations telem_ioss_trc_verb_ops = {
.open = telem_ioss_trc_verb_open,
.read = seq_read,
.write = telem_ioss_trc_verb_write,
.llseek = seq_lseek,
.release = single_release,
};
static int pm_suspend_prep_cb(void)
{
struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
struct telemetry_debugfs_conf *conf = debugfs_conf;
int ret, index;
ret = telemetry_raw_read_eventlog(TELEM_IOSS, evtlog,
TELEM_MAX_OS_ALLOCATED_EVENTS);
if (ret < 0) {
suspend_prep_ok = 0;
goto out;
}
for (index = 0; index < ret; index++) {
TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
suspend_shlw_ctr_temp);
TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
suspend_deep_ctr_temp);
TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
suspend_shlw_res_temp);
TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
suspend_deep_res_temp);
}
suspend_prep_ok = 1;
out:
return NOTIFY_OK;
}
static int pm_suspend_exit_cb(void)
{
struct telemetry_evtlog evtlog[TELEM_MAX_OS_ALLOCATED_EVENTS];
static u32 suspend_shlw_ctr_exit, suspend_deep_ctr_exit;
static u64 suspend_shlw_res_exit, suspend_deep_res_exit;
struct telemetry_debugfs_conf *conf = debugfs_conf;
int ret, index;
if (!suspend_prep_ok)
goto out;
ret = telemetry_raw_read_eventlog(TELEM_IOSS, evtlog,
TELEM_MAX_OS_ALLOCATED_EVENTS);
if (ret < 0)
goto out;
for (index = 0; index < ret; index++) {
TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_occ_id,
suspend_shlw_ctr_exit);
TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_occ_id,
suspend_deep_ctr_exit);
TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_shlw_res_id,
suspend_shlw_res_exit);
TELEM_CHECK_AND_PARSE_CTRS(conf->s0ix_deep_res_id,
suspend_deep_res_exit);
}
if ((suspend_shlw_ctr_exit < suspend_shlw_ctr_temp) ||
(suspend_deep_ctr_exit < suspend_deep_ctr_temp) ||
(suspend_shlw_res_exit < suspend_shlw_res_temp) ||
(suspend_deep_res_exit < suspend_deep_res_temp)) {
pr_err("Wrong s0ix counters detected\n");
goto out;
}
/*
* Due to some design limitations in the firmware, sometimes the
* counters do not get updated by the time we reach here. As a
* workaround, we try to see if this was a genuine case of sleep
* failure or not by cross-checking from PMC GCR registers directly.
*/
if (suspend_shlw_ctr_exit == suspend_shlw_ctr_temp &&
suspend_deep_ctr_exit == suspend_deep_ctr_temp) {
struct telemetry_plt_config *plt_config = telemetry_get_pltdata();
struct intel_pmc_dev *pmc = plt_config->pmc;
ret = intel_pmc_gcr_read64(pmc, PMC_GCR_TELEM_SHLW_S0IX_REG,
&suspend_shlw_res_exit);
if (ret < 0)
goto out;
ret = intel_pmc_gcr_read64(pmc, PMC_GCR_TELEM_DEEP_S0IX_REG,
&suspend_deep_res_exit);
if (ret < 0)
goto out;
if (suspend_shlw_res_exit > suspend_shlw_res_temp)
suspend_shlw_ctr_exit++;
if (suspend_deep_res_exit > suspend_deep_res_temp)
suspend_deep_ctr_exit++;
}
suspend_shlw_ctr_exit -= suspend_shlw_ctr_temp;
suspend_deep_ctr_exit -= suspend_deep_ctr_temp;
suspend_shlw_res_exit -= suspend_shlw_res_temp;
suspend_deep_res_exit -= suspend_deep_res_temp;
if (suspend_shlw_ctr_exit != 0) {
conf->suspend_stats.shlw_ctr +=
suspend_shlw_ctr_exit;
conf->suspend_stats.shlw_res +=
suspend_shlw_res_exit;
}
if (suspend_deep_ctr_exit != 0) {
conf->suspend_stats.deep_ctr +=
suspend_deep_ctr_exit;
conf->suspend_stats.deep_res +=
suspend_deep_res_exit;
}
out:
suspend_prep_ok = 0;
return NOTIFY_OK;
}
static int pm_notification(struct notifier_block *this,
unsigned long event, void *ptr)
{
switch (event) {
case PM_SUSPEND_PREPARE:
return pm_suspend_prep_cb();
case PM_POST_SUSPEND:
return pm_suspend_exit_cb();
}
return NOTIFY_DONE;
}
static struct notifier_block pm_notifier = {
.notifier_call = pm_notification,
};
static int __init telemetry_debugfs_init(void)
{
const struct x86_cpu_id *id;
int err;
struct dentry *dir;
/* Only APL supported for now */
id = x86_match_cpu(telemetry_debugfs_cpu_ids);
if (!id)
return -ENODEV;
debugfs_conf = (struct telemetry_debugfs_conf *)id->driver_data;
if (!telemetry_get_pltdata()) {
pr_info("Invalid pltconfig, ensure IPC1 device is enabled in BIOS\n");
return -ENODEV;
}
err = telemetry_debugfs_check_evts();
if (err < 0) {
pr_info("telemetry_debugfs_check_evts failed\n");
return -EINVAL;
}
register_pm_notifier(&pm_notifier);
dir = debugfs_create_dir("telemetry", NULL);
debugfs_conf->telemetry_dbg_dir = dir;
debugfs_create_file("pss_info", S_IFREG | S_IRUGO, dir, NULL,
&telem_pss_states_fops);
debugfs_create_file("ioss_info", S_IFREG | S_IRUGO, dir, NULL,
&telem_ioss_states_fops);
debugfs_create_file("soc_states", S_IFREG | S_IRUGO, dir, NULL,
&telem_soc_states_fops);
debugfs_create_file("s0ix_residency_usec", S_IFREG | S_IRUGO, dir, NULL,
&telem_s0ix_fops);
debugfs_create_file("pss_trace_verbosity", S_IFREG | S_IRUGO, dir, NULL,
&telem_pss_trc_verb_ops);
debugfs_create_file("ioss_trace_verbosity", S_IFREG | S_IRUGO, dir,
NULL, &telem_ioss_trc_verb_ops);
return 0;
}
static void __exit telemetry_debugfs_exit(void)
{
debugfs_remove_recursive(debugfs_conf->telemetry_dbg_dir);
debugfs_conf->telemetry_dbg_dir = NULL;
unregister_pm_notifier(&pm_notifier);
}
late_initcall(telemetry_debugfs_init);
module_exit(telemetry_debugfs_exit);
MODULE_AUTHOR("Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>");
MODULE_DESCRIPTION("Intel SoC Telemetry debugfs Interface");
MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL v2");