path: root/drivers/platform/x86/intel_telemetry_pltdrv.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Intel SOC Telemetry Platform Driver: Currently supports APL
 * Copyright (c) 2015, Intel Corporation.
 * All Rights Reserved.
 *
 * This file provides the platform specific telemetry implementation for APL.
 * It used the PUNIT and PMC IPC interfaces for configuring the counters.
 * The accumulated results are fetched from SRAM.
 */

#include <linux/io.h>
#include <linux/module.h>
#include <linux/platform_device.h>

#include <asm/cpu_device_id.h>
#include <asm/intel-family.h>
#include <asm/intel_pmc_ipc.h>
#include <asm/intel_punit_ipc.h>
#include <asm/intel_telemetry.h>

#define DRIVER_NAME	"intel_telemetry"
#define DRIVER_VERSION	"1.0.0"

#define TELEM_TRC_VERBOSITY_MASK	0x3

#define TELEM_MIN_PERIOD(x)		((x) & 0x7F0000)
#define TELEM_MAX_PERIOD(x)		((x) & 0x7F000000)
#define TELEM_SAMPLE_PERIOD_INVALID(x)	((x) & (BIT(7)))
#define TELEM_CLEAR_SAMPLE_PERIOD(x)	((x) &= ~0x7F)

#define TELEM_SAMPLING_DEFAULT_PERIOD	0xD

#define TELEM_MAX_EVENTS_SRAM		28
#define TELEM_SSRAM_STARTTIME_OFFSET	8
#define TELEM_SSRAM_EVTLOG_OFFSET	16

#define IOSS_TELEM_EVENT_READ		0x0
#define IOSS_TELEM_EVENT_WRITE		0x1
#define IOSS_TELEM_INFO_READ		0x2
#define IOSS_TELEM_TRACE_CTL_READ	0x5
#define IOSS_TELEM_TRACE_CTL_WRITE	0x6
#define IOSS_TELEM_EVENT_CTL_READ	0x7
#define IOSS_TELEM_EVENT_CTL_WRITE	0x8
#define IOSS_TELEM_EVT_CTRL_WRITE_SIZE	0x4
#define IOSS_TELEM_READ_WORD		0x1
#define IOSS_TELEM_WRITE_FOURBYTES	0x4
#define IOSS_TELEM_EVT_WRITE_SIZE	0x3

#define TELEM_INFO_SRAMEVTS_MASK	0xFF00
#define TELEM_INFO_SRAMEVTS_SHIFT	0x8
#define TELEM_SSRAM_READ_TIMEOUT	10

#define TELEM_INFO_NENABLES_MASK	0xFF
#define TELEM_EVENT_ENABLE		0x8000

#define TELEM_MASK_BIT			1
#define TELEM_MASK_BYTE			0xFF
#define BYTES_PER_LONG			8
#define TELEM_MASK_PCS_STATE		0xF

#define TELEM_DISABLE(x)		((x) &= ~(BIT(31)))
#define TELEM_CLEAR_EVENTS(x)		((x) |= (BIT(30)))
#define TELEM_ENABLE_SRAM_EVT_TRACE(x)	((x) &= ~(BIT(30) | BIT(24)))
#define TELEM_ENABLE_PERIODIC(x)	((x) |= (BIT(23) | BIT(31) | BIT(7)))
#define TELEM_EXTRACT_VERBOSITY(x, y)	((y) = (((x) >> 27) & 0x3))
#define TELEM_CLEAR_VERBOSITY_BITS(x)	((x) &= ~(BIT(27) | BIT(28)))
#define TELEM_SET_VERBOSITY_BITS(x, y)	((x) |= ((y) << 27))

#define TELEM_CPU(model, data) \
	{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, (unsigned long)&data }

enum telemetry_action {
	TELEM_UPDATE = 0,
	TELEM_ADD,
	TELEM_RESET,
	TELEM_ACTION_NONE
};

struct telem_ssram_region {
	u64 timestamp;
	u64 start_time;
	u64 events[TELEM_MAX_EVENTS_SRAM];
};

static struct telemetry_plt_config *telm_conf;

/*
 * The following counters are programmed by default during setup.
 * Only 20 allocated to kernel driver
 */
static struct telemetry_evtmap
	telemetry_apl_ioss_default_events[TELEM_MAX_OS_ALLOCATED_EVENTS] = {
	{"SOC_S0IX_TOTAL_RES",			0x4800},
	{"SOC_S0IX_TOTAL_OCC",			0x4000},
	{"SOC_S0IX_SHALLOW_RES",		0x4801},
	{"SOC_S0IX_SHALLOW_OCC",		0x4001},
	{"SOC_S0IX_DEEP_RES",			0x4802},
	{"SOC_S0IX_DEEP_OCC",			0x4002},
	{"PMC_POWER_GATE",			0x5818},
	{"PMC_D3_STATES",			0x5819},
	{"PMC_D0I3_STATES",			0x581A},
	{"PMC_S0IX_WAKE_REASON_GPIO",		0x6000},
	{"PMC_S0IX_WAKE_REASON_TIMER",		0x6001},
	{"PMC_S0IX_WAKE_REASON_VNNREQ",         0x6002},
	{"PMC_S0IX_WAKE_REASON_LOWPOWER",       0x6003},
	{"PMC_S0IX_WAKE_REASON_EXTERNAL",       0x6004},
	{"PMC_S0IX_WAKE_REASON_MISC",           0x6005},
	{"PMC_S0IX_BLOCKING_IPS_D3_D0I3",       0x6006},
	{"PMC_S0IX_BLOCKING_IPS_PG",            0x6007},
	{"PMC_S0IX_BLOCKING_MISC_IPS_PG",       0x6008},
	{"PMC_S0IX_BLOCK_IPS_VNN_REQ",          0x6009},
	{"PMC_S0IX_BLOCK_IPS_CLOCKS",           0x600B},
};


static struct telemetry_evtmap
	telemetry_apl_pss_default_events[TELEM_MAX_OS_ALLOCATED_EVENTS] = {
	{"IA_CORE0_C6_RES",			0x0400},
	{"IA_CORE0_C6_CTR",			0x0000},
	{"IA_MODULE0_C7_RES",			0x0410},
	{"IA_MODULE0_C7_CTR",			0x000E},
	{"IA_C0_RES",				0x0805},
	{"PCS_LTR",				0x2801},
	{"PSTATES",				0x2802},
	{"SOC_S0I3_RES",			0x0409},
	{"SOC_S0I3_CTR",			0x000A},
	{"PCS_S0I3_CTR",			0x0009},
	{"PCS_C1E_RES",				0x041A},
	{"PCS_IDLE_STATUS",			0x2806},
	{"IA_PERF_LIMITS",			0x280B},
	{"GT_PERF_LIMITS",			0x280C},
	{"PCS_WAKEUP_S0IX_CTR",			0x0030},
	{"PCS_IDLE_BLOCKED",			0x2C00},
	{"PCS_S0IX_BLOCKED",			0x2C01},
	{"PCS_S0IX_WAKE_REASONS",		0x2C02},
	{"PCS_LTR_BLOCKING",			0x2C03},
	{"PC2_AND_MEM_SHALLOW_IDLE_RES",	0x1D40},
};

static struct telemetry_evtmap
	telemetry_glk_pss_default_events[TELEM_MAX_OS_ALLOCATED_EVENTS] = {
	{"IA_CORE0_C6_RES",			0x0400},
	{"IA_CORE0_C6_CTR",			0x0000},
	{"IA_MODULE0_C7_RES",			0x0410},
	{"IA_MODULE0_C7_CTR",			0x000C},
	{"IA_C0_RES",				0x0805