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

// 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 …
#define DRIVER_VERSION …

/* ApolloLake SoC Event-IDs */
#define TELEM_APL_PSS_PSTATES_ID …
#define TELEM_APL_PSS_IDLE_ID …
#define TELEM_APL_PCS_IDLE_BLOCKED_ID …
#define TELEM_APL_PCS_S0IX_BLOCKED_ID …
#define TELEM_APL_PSS_WAKEUP_ID …
#define TELEM_APL_PSS_LTR_BLOCKING_ID …

#define TELEM_APL_S0IX_TOTAL_OCC_ID …
#define TELEM_APL_S0IX_SHLW_OCC_ID …
#define TELEM_APL_S0IX_DEEP_OCC_ID …
#define TELEM_APL_S0IX_TOTAL_RES_ID …
#define TELEM_APL_S0IX_SHLW_RES_ID …
#define TELEM_APL_S0IX_DEEP_RES_ID …
#define TELEM_APL_D0IX_ID …
#define TELEM_APL_D3_ID …
#define TELEM_APL_PG_ID …

#define TELEM_INFO_SRAMEVTS_MASK …
#define TELEM_INFO_SRAMEVTS_SHIFT …
#define TELEM_SSRAM_READ_TIMEOUT …

#define TELEM_MASK_BIT …
#define TELEM_MASK_BYTE …
#define BYTES_PER_LONG …
#define TELEM_APL_MASK_PCS_STATE …

/* Max events in bitmap to check for */
#define TELEM_PSS_IDLE_EVTS …
#define TELEM_PSS_IDLE_BLOCKED_EVTS …
#define TELEM_PSS_S0IX_BLOCKED_EVTS …
#define TELEM_PSS_S0IX_WAKEUP_EVTS …
#define TELEM_PSS_LTR_BLOCKING_EVTS …
#define TELEM_IOSS_DX_D0IX_EVTS …
#define TELEM_IOSS_PG_EVTS …

#define TELEM_CHECK_AND_PARSE_EVTS(EVTID, EVTNUM, BUF, EVTLOG, EVTDAT, MASK) …

#define TELEM_CHECK_AND_PARSE_CTRS(EVTID, CTR) …

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 { … };

/* Bitmap definitions for default counters in APL */
struct telem_pss_idle_stateinfo { … };

static struct telem_pss_idle_stateinfo telem_apl_pss_idle_data[] = …;

struct telem_pcs_blkd_info { … };

static struct telem_pcs_blkd_info telem_apl_pcs_idle_blkd_data[] = …;

static struct telem_pcs_blkd_info telem_apl_pcs_s0ix_blkd_data[] = …;

struct telem_pss_ltr_info { … };

static struct telem_pss_ltr_info telem_apl_pss_ltr_data[] = …;

struct telem_pss_wakeup_info { … };

static struct telem_pss_wakeup_info telem_apl_pss_wakeup[] = …;

struct telem_ioss_d0ix_stateinfo { … };

static struct telem_ioss_d0ix_stateinfo telem_apl_ioss_d0ix_data[] = …;

struct telem_ioss_pg_info { … };

static struct telem_ioss_pg_info telem_apl_ioss_pg_data[] = …;

struct telemetry_debugfs_conf { … };

static struct telemetry_debugfs_conf *debugfs_conf;

static struct telemetry_debugfs_conf telem_apl_debugfs_conf = …;

static const struct x86_cpu_id telemetry_debugfs_cpu_ids[] = …;
MODULE_DEVICE_TABLE(x86cpu, telemetry_debugfs_cpu_ids);

static int telemetry_debugfs_check_evts(void)
{ … }

static int telem_pss_states_show(struct seq_file *s, void *unused)
{ … }

DEFINE_SHOW_ATTRIBUTE(…);

static int telem_ioss_states_show(struct seq_file *s, void *unused)
{ … }

DEFINE_SHOW_ATTRIBUTE(…);

static int telem_soc_states_show(struct seq_file *s, void *unused)
{ … }

DEFINE_SHOW_ATTRIBUTE(…);

static int telem_s0ix_res_get(void *data, u64 *val)
{ … }

DEFINE_DEBUGFS_ATTRIBUTE(…);

static int telem_pss_trc_verb_show(struct seq_file *s, void *unused)
{ … }

static ssize_t telem_pss_trc_verb_write(struct file *file,
					const char __user *userbuf,
					size_t count, loff_t *ppos)
{ … }

static int telem_pss_trc_verb_open(struct inode *inode, struct file *file)
{ … }

static const struct file_operations telem_pss_trc_verb_ops = …;

static int telem_ioss_trc_verb_show(struct seq_file *s, void *unused)
{ … }

static ssize_t telem_ioss_trc_verb_write(struct file *file,
					 const char __user *userbuf,
					 size_t count, loff_t *ppos)
{ … }

static int telem_ioss_trc_verb_open(struct inode *inode, struct file *file)
{ … }

static const struct file_operations telem_ioss_trc_verb_ops = …;

static int pm_suspend_prep_cb(void)
{ … }

static int pm_suspend_exit_cb(void)
{ … }

static int pm_notification(struct notifier_block *this,
			   unsigned long event, void *ptr)
{ … }

static struct notifier_block pm_notifier = …;

static int __init telemetry_debugfs_init(void)
{ … }

static void __exit telemetry_debugfs_exit(void)
{ … }

late_initcall(telemetry_debugfs_init);
module_exit(telemetry_debugfs_exit);

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_VERSION(…);
MODULE_LICENSE(…) …;