[PATCH v3 4/5] platform:x86: Add Intel Telemetry Debugfs interfaces
From: Souvik Kumar Chakravarty
Date: Thu Jan 07 2016 - 04:02:11 EST
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@xxxxxxxxx>
---
drivers/platform/x86/intel_telemetry_debugfs.c | 1030 ++++++++++++++++++++++++
1 file changed, 1030 insertions(+)
create mode 100644 drivers/platform/x86/intel_telemetry_debugfs.c
diff --git a/drivers/platform/x86/intel_telemetry_debugfs.c b/drivers/platform/x86/intel_telemetry_debugfs.c
new file mode 100644
index 0000000..5b31d15
--- /dev/null
+++ b/drivers/platform/x86/intel_telemetry_debugfs.c
@@ -0,0 +1,1030 @@
+/*
+ * 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; \
+ } \
+}
+
+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_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@xxxxxxxxx>");
+MODULE_DESCRIPTION("Intel SoC Telemetry debugfs Interface");
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL");
--
1.7.9.5
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