[PATCH v5 4/4] platform:x86: Add Intel Telemetry Debugfs interfaces

[Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>]

This implements debugfs interfaces for reading the telemetry
samples from SSRAM and configuring firmware trace verbosity.
Interface created under /sys/kernel/debug/telemetry
soc_states: SoC Device and Low Power States
pss_info: Info from the Primary SubSystem
ioss_info: Info from IO SubSusytem
pss_trace_verbosity: Read/Modify PSS F/W trace verbosity
ioss_trace_verbosity: Read/Modify IOSS F/W trace verbosity.

Signed-off-by: Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>

---
Change in v5: Fix warning when compiling with CONFIG_PM_SLEEP underfined
---
 MAINTAINERS                                    |    1 +
 drivers/platform/x86/Makefile                  |    3 +-
 drivers/platform/x86/intel_telemetry_debugfs.c | 1032 ++++++++++++++++++++++++
 3 files changed, 1035 insertions(+), 1 deletion(-)
 create mode 100644 drivers/platform/x86/intel_telemetry_debugfs.c

diff --git a/MAINTAINERS b/MAINTAINERS
index ed0b031..cb872cb 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5698,6 +5698,7 @@ S:	Maintained
 F:	drivers/platform/x86/intel_telemetry_core.c
 F:	arch/x86/include/asm/intel_telemetry.h
 F:	drivers/platform/x86/intel_telemetry_pltdrv.c
+F:	drivers/platform/x86/intel_telemetry_debugfs.c
 
 IOC3 ETHERNET DRIVER
 M:	Ralf Baechle <ralf@linux-mips.org>
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index dd3bdaa..17538b0 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -64,4 +64,5 @@ obj-$(CONFIG_INTEL_PMC_IPC)	+= intel_pmc_ipc.o
 obj-$(CONFIG_SURFACE_PRO3_BUTTON)	+= surfacepro3_button.o
 obj-$(CONFIG_INTEL_PUNIT_IPC)  += intel_punit_ipc.o
 obj-$(CONFIG_INTEL_TELEMETRY)	+= intel_telemetry_core.o \
-				   intel_telemetry_pltdrv.o
+				   intel_telemetry_pltdrv.o \
+				   intel_telemetry_debugfs.o
diff --git a/drivers/platform/x86/intel_telemetry_debugfs.c b/drivers/platform/x86/intel_telemetry_debugfs.c
new file mode 100644
index 0000000..f5134ac
--- /dev/null
+++ b/drivers/platform/x86/intel_telemetry_debugfs.c
@@ -0,0 +1,1032 @@
+/*
+ * Intel SOC Telemetry debugfs Driver: Currently supports APL
+ * Copyright (c) 2015, Intel Corporation.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * 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/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
+#include <linux/pci.h>
+#include <linux/suspend.h>
+
+#include <asm/cpu_device_id.h>
+#include <asm/intel_pmc_ipc.h>
+#include <asm/intel_punit_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_EVT_LEN(x) (sizeof(x)/sizeof((x)[0]))
+
+#define TELEM_DEBUGFS_CPU(model, data) \
+	{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_MWAIT, (unsigned long)&data}
+
+#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; \
+	} \
+}
+
+#ifdef CONFIG_PM_SLEEP
+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;
+#endif
+
+struct telemetry_susp_stats {
+	u32 shlw_swake_ctr;
+	u32 deep_swake_ctr;
+	u64 shlw_swake_res;
+	u64 deep_swake_res;
+	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 = TELEM_EVT_LEN(telem_apl_pss_idle_data),
+	.pcs_idle_blkd_evts = TELEM_EVT_LEN(telem_apl_pcs_idle_blkd_data),
+	.pcs_s0ix_blkd_evts = TELEM_EVT_LEN(telem_apl_pcs_s0ix_blkd_data),
+	.pss_ltr_evts = TELEM_EVT_LEN(telem_apl_pss_ltr_data),
+	.pss_wakeup_evts = TELEM_EVT_LEN(telem_apl_pss_wakeup),
+	.ioss_d0ix_evts = TELEM_EVT_LEN(telem_apl_ioss_d0ix_data),
+	.ioss_pg_evts = TELEM_EVT_LEN(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[] = {
+	TELEM_DEBUGFS_CPU(0x5c, 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;
+}
+
+static int telem_pss_state_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, telem_pss_states_show, inode->i_private);
+}
+
+static const struct file_operations telem_pss_ops = {
+	.open		= telem_pss_state_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+
+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;
+}
+
+static int telem_ioss_state_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, telem_ioss_states_show, inode->i_private);
+}
+
+static const struct file_operations telem_ioss_ops = {
+	.open		= telem_ioss_state_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+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 -
+		   conf->suspend_stats.shlw_swake_ctr,
+		   (u64)((s0ix_shlw_res -
+		   conf->suspend_stats.shlw_res -
+		   conf->suspend_stats.shlw_swake_res)*10/192));
+
+	seq_printf(s, "S0IX Deep\t\t\t %10u\t %10llu\n",
+		   s0ix_deep_ctr -
+		   conf->suspend_stats.deep_ctr -
+		   conf->suspend_stats.deep_swake_ctr,
+		   (u64)((s0ix_deep_res -
+		   conf->suspend_stats.deep_res -
+		   conf->suspend_stats.deep_swake_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, "Suspend(With Shallow-Wakes)\t %10u\t %10llu\n",
+		   conf->suspend_stats.shlw_swake_ctr +
+		   conf->suspend_stats.deep_swake_ctr,
+		   (u64)((conf->suspend_stats.shlw_swake_res +
+		   conf->suspend_stats.deep_swake_res)*10/192));
+
+	seq_printf(s, "S0IX+Suspend Total\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;
+}
+
+static int telem_soc_state_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, telem_soc_states_show, inode->i_private);
+}
+
+static const struct file_operations telem_socstate_ops = {
+	.open		= telem_soc_state_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+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,
+};
+
+#ifdef CONFIG_PM_SLEEP
+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;
+	}
+
+	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 == 1) {
+		conf->suspend_stats.shlw_ctr +=
+		suspend_shlw_ctr_exit;
+
+		conf->suspend_stats.shlw_res +=
+		suspend_shlw_res_exit;
+	}
+	/* Shallow Wakes Case */
+	else if (suspend_shlw_ctr_exit > 1) {
+		conf->suspend_stats.shlw_swake_ctr +=
+		suspend_shlw_ctr_exit;
+
+		conf->suspend_stats.shlw_swake_res +=
+		suspend_shlw_res_exit;
+	}
+
+	if (suspend_deep_ctr_exit == 1) {
+		conf->suspend_stats.deep_ctr +=
+		suspend_deep_ctr_exit;
+
+		conf->suspend_stats.deep_res +=
+		suspend_deep_res_exit;
+	}
+
+	/* Shallow Wakes Case */
+	else if (suspend_deep_ctr_exit > 1) {
+		conf->suspend_stats.deep_swake_ctr +=
+		suspend_deep_ctr_exit;
+
+		conf->suspend_stats.deep_swake_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,
+};
+#endif /* CONFIG_PM_SLEEP */
+
+static int __init telemetry_debugfs_init(void)
+{
+	const struct x86_cpu_id *id;
+	int err = -ENOMEM;
+	struct dentry *f;
+
+	/* 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)
+		return -ENODEV;
+
+	err = telemetry_debugfs_check_evts();
+	if (err < 0)
+		return -EINVAL;
+
+
+#ifdef CONFIG_PM_SLEEP
+	register_pm_notifier(&pm_notifier);
+#endif /* CONFIG_PM_SLEEP */
+
+	debugfs_conf->telemetry_dbg_dir = debugfs_create_dir("telemetry", NULL);
+	if (!debugfs_conf->telemetry_dbg_dir)
+		return -ENOMEM;
+
+	f = debugfs_create_file("pss_info", S_IFREG | S_IRUGO,
+				debugfs_conf->telemetry_dbg_dir, NULL,
+				&telem_pss_ops);
+	if (!f) {
+		pr_err("pss_sample_info debugfs register failed\n");
+		goto out;
+	}
+
+	f = debugfs_create_file("ioss_info", S_IFREG | S_IRUGO,
+				debugfs_conf->telemetry_dbg_dir, NULL,
+				&telem_ioss_ops);
+	if (!f) {
+		pr_err("ioss_sample_info debugfs register failed\n");
+		goto out;
+	}
+
+	f = debugfs_create_file("soc_states", S_IFREG | S_IRUGO,
+				debugfs_conf->telemetry_dbg_dir,
+				NULL, &telem_socstate_ops);
+	if (!f) {
+		pr_err("ioss_sample_info debugfs register failed\n");
+		goto out;
+	}
+
+	f = debugfs_create_file("pss_trace_verbosity", S_IFREG | S_IRUGO,
+				debugfs_conf->telemetry_dbg_dir, NULL,
+				&telem_pss_trc_verb_ops);
+	if (!f) {
+		pr_err("pss_trace_verbosity debugfs register failed\n");
+		goto out;
+	}
+
+	f = debugfs_create_file("ioss_trace_verbosity", S_IFREG | S_IRUGO,
+				debugfs_conf->telemetry_dbg_dir, NULL,
+				&telem_ioss_trc_verb_ops);
+	if (!f) {
+		pr_err("ioss_trace_verbosity debugfs register failed\n");
+		goto out;
+	}
+
+	return 0;
+
+out:
+	debugfs_remove_recursive(debugfs_conf->telemetry_dbg_dir);
+	debugfs_conf->telemetry_dbg_dir = NULL;
+
+	return err;
+}
+
+static void __exit telemetry_debugfs_exit(void)
+{
+	debugfs_remove_recursive(debugfs_conf->telemetry_dbg_dir);
+	debugfs_conf->telemetry_dbg_dir = NULL;
+}
+
+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");
-- 
1.7.9.5