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linux_dsm_epyc7002/drivers/platform/x86/intel_telemetry_debugfs.c
Greg Kroah-Hartman 2a5753559e platform/x86: intel_telemetry: no need to check return value of debugfs_create functions 
When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Rajneesh Bhardwaj <rajneesh.bhardwaj@linux.intel.com>
Cc: "David E. Box" <david.e.box@linux.intel.com>
Cc: Darren Hart <dvhart@infradead.org>
Cc: Andy Shevchenko <andy@infradead.org>
Cc: platform-driver-x86@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-06-17 15:20:58 +03:00

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// 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/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_pmc_ipc.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[] = {
INTEL_CPU_FAM6(ATOM_GOLDMONT, telem_apl_debugfs_conf),
INTEL_CPU_FAM6(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)
{
u64 s0ix_total_res;
int ret;
ret = intel_pmc_s0ix_counter_read(&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;
if (kstrtou32_from_user(userbuf, count, 0, &verbosity))
return -EFAULT;
err = telemetry_set_trace_verbosity(TELEM_PSS, verbosity);
if (err) {
pr_err("Changing PSS Trace Verbosity Failed. Error %d\n", err);
count = 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;
if (kstrtou32_from_user(userbuf, count, 0, &verbosity))
return -EFAULT;
err = telemetry_set_trace_verbosity(TELEM_IOSS, verbosity);
if (err) {
pr_err("Changing IOSS Trace Verbosity Failed. Error %d\n", err);
count = 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) {
ret = intel_pmc_gcr_read64(PMC_GCR_TELEM_SHLW_S0IX_REG,
&suspend_shlw_res_exit);
if (ret < 0)
goto out;
ret = intel_pmc_gcr_read64(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;
err = telemetry_pltconfig_valid();
if (err < 0) {
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");
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