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OpenCloudOS-Kernel/drivers/platform/x86/intel_telemetry_pltdrv.c

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/*
* Intel SOC Telemetry Platform 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 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/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 <linux/platform_device.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 "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_MAX_OS_ALLOCATED_EVENTS 20
#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_MWAIT, (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},
};
/* APL specific Data */
static struct telemetry_plt_config telem_apl_config = {
.pss_config = {
.telem_evts = telemetry_apl_pss_default_events,
},
.ioss_config = {
.telem_evts = telemetry_apl_ioss_default_events,
},
};
static const struct x86_cpu_id telemetry_cpu_ids[] = {
TELEM_CPU(0x5c, telem_apl_config),
{}
};
MODULE_DEVICE_TABLE(x86cpu, telemetry_cpu_ids);
static inline int telem_get_unitconfig(enum telemetry_unit telem_unit,
struct telemetry_unit_config **unit_config)
{
if (telem_unit == TELEM_PSS)
*unit_config = &(telm_conf->pss_config);
else if (telem_unit == TELEM_IOSS)
*unit_config = &(telm_conf->ioss_config);
else
return -EINVAL;
return 0;
}
static int telemetry_check_evtid(enum telemetry_unit telem_unit,
u32 *evtmap, u8 len,
enum telemetry_action action)
{
struct telemetry_unit_config *unit_config;
int ret;
ret = telem_get_unitconfig(telem_unit, &unit_config);
if (ret < 0)
return ret;
switch (action) {
case TELEM_RESET:
if (len > TELEM_MAX_EVENTS_SRAM)
return -EINVAL;
break;
case TELEM_UPDATE:
if (len > TELEM_MAX_EVENTS_SRAM)
return -EINVAL;
if ((len > 0) && (evtmap == NULL))
return -EINVAL;
break;
case TELEM_ADD:
if ((len + unit_config->ssram_evts_used) >
TELEM_MAX_EVENTS_SRAM)
return -EINVAL;
if ((len > 0) && (evtmap == NULL))
return -EINVAL;
break;
default:
pr_err("Unknown Telemetry action Specified %d\n", action);
return -EINVAL;
}
return 0;
}
static inline int telemetry_plt_config_ioss_event(u32 evt_id, int index)
{
u32 write_buf;
int ret;
write_buf = evt_id | TELEM_EVENT_ENABLE;
write_buf <<= BITS_PER_BYTE;
write_buf |= index;
ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
IOSS_TELEM_EVENT_WRITE, (u8 *)&write_buf,
IOSS_TELEM_EVT_WRITE_SIZE, NULL, 0);
return ret;
}
static inline int telemetry_plt_config_pss_event(u32 evt_id, int index)
{
u32 write_buf;
int ret;
write_buf = evt_id | TELEM_EVENT_ENABLE;
ret = intel_punit_ipc_command(IPC_PUNIT_BIOS_WRITE_TELE_EVENT,
index, 0, &write_buf, NULL);
return ret;
}
static int telemetry_setup_iossevtconfig(struct telemetry_evtconfig evtconfig,
enum telemetry_action action)
{
u8 num_ioss_evts, ioss_period;
int ret, index, idx;
u32 *ioss_evtmap;
u32 telem_ctrl;
num_ioss_evts = evtconfig.num_evts;
ioss_period = evtconfig.period;
ioss_evtmap = evtconfig.evtmap;
/* Get telemetry EVENT CTL */
ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
IOSS_TELEM_EVENT_CTL_READ, NULL, 0,
&telem_ctrl, IOSS_TELEM_READ_WORD);
if (ret) {
pr_err("IOSS TELEM_CTRL Read Failed\n");
return ret;
}
/* Disable Telemetry */
TELEM_DISABLE(telem_ctrl);
ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
IOSS_TELEM_EVENT_CTL_WRITE,
(u8 *)&telem_ctrl,
IOSS_TELEM_EVT_CTRL_WRITE_SIZE,
NULL, 0);
if (ret) {
pr_err("IOSS TELEM_CTRL Event Disable Write Failed\n");
return ret;
}
/* Reset Everything */
if (action == TELEM_RESET) {
/* Clear All Events */
TELEM_CLEAR_EVENTS(telem_ctrl);
ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
IOSS_TELEM_EVENT_CTL_WRITE,
(u8 *)&telem_ctrl,
IOSS_TELEM_EVT_CTRL_WRITE_SIZE,
NULL, 0);
if (ret) {
pr_err("IOSS TELEM_CTRL Event Disable Write Failed\n");
return ret;
}
telm_conf->ioss_config.ssram_evts_used = 0;
/* Configure Events */
for (idx = 0; idx < num_ioss_evts; idx++) {
if (telemetry_plt_config_ioss_event(
telm_conf->ioss_config.telem_evts[idx].evt_id,
idx)) {
pr_err("IOSS TELEM_RESET Fail for data: %x\n",
telm_conf->ioss_config.telem_evts[idx].evt_id);
continue;
}
telm_conf->ioss_config.ssram_evts_used++;
}
}
/* Re-Configure Everything */
if (action == TELEM_UPDATE) {
/* Clear All Events */
TELEM_CLEAR_EVENTS(telem_ctrl);
ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
IOSS_TELEM_EVENT_CTL_WRITE,
(u8 *)&telem_ctrl,
IOSS_TELEM_EVT_CTRL_WRITE_SIZE,
NULL, 0);
if (ret) {
pr_err("IOSS TELEM_CTRL Event Disable Write Failed\n");
return ret;
}
telm_conf->ioss_config.ssram_evts_used = 0;
/* Configure Events */
for (index = 0; index < num_ioss_evts; index++) {
telm_conf->ioss_config.telem_evts[index].evt_id =
ioss_evtmap[index];
if (telemetry_plt_config_ioss_event(
telm_conf->ioss_config.telem_evts[index].evt_id,
index)) {
pr_err("IOSS TELEM_UPDATE Fail for Evt%x\n",
ioss_evtmap[index]);
continue;
}
telm_conf->ioss_config.ssram_evts_used++;
}
}
/* Add some Events */
if (action == TELEM_ADD) {
/* Configure Events */
for (index = telm_conf->ioss_config.ssram_evts_used, idx = 0;
idx < num_ioss_evts; index++, idx++) {
telm_conf->ioss_config.telem_evts[index].evt_id =
ioss_evtmap[idx];
if (telemetry_plt_config_ioss_event(
telm_conf->ioss_config.telem_evts[index].evt_id,
index)) {
pr_err("IOSS TELEM_ADD Fail for Event %x\n",
ioss_evtmap[idx]);
continue;
}
telm_conf->ioss_config.ssram_evts_used++;
}
}
/* Enable Periodic Telemetry Events and enable SRAM trace */
TELEM_CLEAR_SAMPLE_PERIOD(telem_ctrl);
TELEM_ENABLE_SRAM_EVT_TRACE(telem_ctrl);
TELEM_ENABLE_PERIODIC(telem_ctrl);
telem_ctrl |= ioss_period;
ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
IOSS_TELEM_EVENT_CTL_WRITE,
(u8 *)&telem_ctrl,
IOSS_TELEM_EVT_CTRL_WRITE_SIZE, NULL, 0);
if (ret) {
pr_err("IOSS TELEM_CTRL Event Enable Write Failed\n");
return ret;
}
telm_conf->ioss_config.curr_period = ioss_period;
return 0;
}
static int telemetry_setup_pssevtconfig(struct telemetry_evtconfig evtconfig,
enum telemetry_action action)
{
u8 num_pss_evts, pss_period;
int ret, index, idx;
u32 *pss_evtmap;
u32 telem_ctrl;
num_pss_evts = evtconfig.num_evts;
pss_period = evtconfig.period;
pss_evtmap = evtconfig.evtmap;
/* PSS Config */
/* Get telemetry EVENT CTL */
ret = intel_punit_ipc_command(IPC_PUNIT_BIOS_READ_TELE_EVENT_CTRL,
0, 0, NULL, &telem_ctrl);
if (ret) {
pr_err("PSS TELEM_CTRL Read Failed\n");
return ret;
}
/* Disable Telemetry */
TELEM_DISABLE(telem_ctrl);
ret = intel_punit_ipc_command(IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
0, 0, &telem_ctrl, NULL);
if (ret) {
pr_err("PSS TELEM_CTRL Event Disable Write Failed\n");
return ret;
}
/* Reset Everything */
if (action == TELEM_RESET) {
/* Clear All Events */
TELEM_CLEAR_EVENTS(telem_ctrl);
ret = intel_punit_ipc_command(
IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
0, 0, &telem_ctrl, NULL);
if (ret) {
pr_err("PSS TELEM_CTRL Event Disable Write Failed\n");
return ret;
}
telm_conf->pss_config.ssram_evts_used = 0;
/* Configure Events */
for (idx = 0; idx < num_pss_evts; idx++) {
if (telemetry_plt_config_pss_event(
telm_conf->pss_config.telem_evts[idx].evt_id,
idx)) {
pr_err("PSS TELEM_RESET Fail for Event %x\n",
telm_conf->pss_config.telem_evts[idx].evt_id);
continue;
}
telm_conf->pss_config.ssram_evts_used++;
}
}
/* Re-Configure Everything */
if (action == TELEM_UPDATE) {
/* Clear All Events */
TELEM_CLEAR_EVENTS(telem_ctrl);
ret = intel_punit_ipc_command(
IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
0, 0, &telem_ctrl, NULL);
if (ret) {
pr_err("PSS TELEM_CTRL Event Disable Write Failed\n");
return ret;
}
telm_conf->pss_config.ssram_evts_used = 0;
/* Configure Events */
for (index = 0; index < num_pss_evts; index++) {
telm_conf->pss_config.telem_evts[index].evt_id =
pss_evtmap[index];
if (telemetry_plt_config_pss_event(
telm_conf->pss_config.telem_evts[index].evt_id,
index)) {
pr_err("PSS TELEM_UPDATE Fail for Event %x\n",
pss_evtmap[index]);
continue;
}
telm_conf->pss_config.ssram_evts_used++;
}
}
/* Add some Events */
if (action == TELEM_ADD) {
/* Configure Events */
for (index = telm_conf->pss_config.ssram_evts_used, idx = 0;
idx < num_pss_evts; index++, idx++) {
telm_conf->pss_config.telem_evts[index].evt_id =
pss_evtmap[idx];
if (telemetry_plt_config_pss_event(
telm_conf->pss_config.telem_evts[index].evt_id,
index)) {
pr_err("PSS TELEM_ADD Fail for Event %x\n",
pss_evtmap[idx]);
continue;
}
telm_conf->pss_config.ssram_evts_used++;
}
}
/* Enable Periodic Telemetry Events and enable SRAM trace */
TELEM_CLEAR_SAMPLE_PERIOD(telem_ctrl);
TELEM_ENABLE_SRAM_EVT_TRACE(telem_ctrl);
TELEM_ENABLE_PERIODIC(telem_ctrl);
telem_ctrl |= pss_period;
ret = intel_punit_ipc_command(IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
0, 0, &telem_ctrl, NULL);
if (ret) {
pr_err("PSS TELEM_CTRL Event Enable Write Failed\n");
return ret;
}
telm_conf->pss_config.curr_period = pss_period;
return 0;
}
static int telemetry_setup_evtconfig(struct telemetry_evtconfig pss_evtconfig,
struct telemetry_evtconfig ioss_evtconfig,
enum telemetry_action action)
{
int ret;
mutex_lock(&(telm_conf->telem_lock));
if ((action == TELEM_UPDATE) && (telm_conf->telem_in_use)) {
ret = -EBUSY;
goto out;
}
ret = telemetry_check_evtid(TELEM_PSS, pss_evtconfig.evtmap,
pss_evtconfig.num_evts, action);
if (ret)
goto out;
ret = telemetry_check_evtid(TELEM_IOSS, ioss_evtconfig.evtmap,
ioss_evtconfig.num_evts, action);
if (ret)
goto out;
if (ioss_evtconfig.num_evts) {
ret = telemetry_setup_iossevtconfig(ioss_evtconfig, action);
if (ret)
goto out;
}
if (pss_evtconfig.num_evts) {
ret = telemetry_setup_pssevtconfig(pss_evtconfig, action);
if (ret)
goto out;
}
if ((action == TELEM_UPDATE) || (action == TELEM_ADD))
telm_conf->telem_in_use = true;
else
telm_conf->telem_in_use = false;
out:
mutex_unlock(&(telm_conf->telem_lock));
return ret;
}
static int telemetry_setup(struct platform_device *pdev)
{
struct telemetry_evtconfig pss_evtconfig, ioss_evtconfig;
u32 read_buf, events, event_regs;
int ret;
ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY, IOSS_TELEM_INFO_READ,
NULL, 0, &read_buf, IOSS_TELEM_READ_WORD);
if (ret) {
dev_err(&pdev->dev, "IOSS TELEM_INFO Read Failed\n");
return ret;
}
/* Get telemetry Info */
events = (read_buf & TELEM_INFO_SRAMEVTS_MASK) >>
TELEM_INFO_SRAMEVTS_SHIFT;
event_regs = read_buf & TELEM_INFO_NENABLES_MASK;
if ((events < TELEM_MAX_EVENTS_SRAM) ||
(event_regs < TELEM_MAX_EVENTS_SRAM)) {
dev_err(&pdev->dev, "IOSS:Insufficient Space for SRAM Trace\n");
dev_err(&pdev->dev, "SRAM Events %d; Event Regs %d\n",
events, event_regs);
return -ENOMEM;
}
telm_conf->ioss_config.min_period = TELEM_MIN_PERIOD(read_buf);
telm_conf->ioss_config.max_period = TELEM_MAX_PERIOD(read_buf);
/* PUNIT Mailbox Setup */
ret = intel_punit_ipc_command(IPC_PUNIT_BIOS_READ_TELE_INFO, 0, 0,
NULL, &read_buf);
if (ret) {
dev_err(&pdev->dev, "PSS TELEM_INFO Read Failed\n");
return ret;
}
/* Get telemetry Info */
events = (read_buf & TELEM_INFO_SRAMEVTS_MASK) >>
TELEM_INFO_SRAMEVTS_SHIFT;
event_regs = read_buf & TELEM_INFO_SRAMEVTS_MASK;
if ((events < TELEM_MAX_EVENTS_SRAM) ||
(event_regs < TELEM_MAX_EVENTS_SRAM)) {
dev_err(&pdev->dev, "PSS:Insufficient Space for SRAM Trace\n");
dev_err(&pdev->dev, "SRAM Events %d; Event Regs %d\n",
events, event_regs);
return -ENOMEM;
}
telm_conf->pss_config.min_period = TELEM_MIN_PERIOD(read_buf);
telm_conf->pss_config.max_period = TELEM_MAX_PERIOD(read_buf);
pss_evtconfig.evtmap = NULL;
pss_evtconfig.num_evts = TELEM_MAX_OS_ALLOCATED_EVENTS;
pss_evtconfig.period = TELEM_SAMPLING_DEFAULT_PERIOD;
ioss_evtconfig.evtmap = NULL;
ioss_evtconfig.num_evts = TELEM_MAX_OS_ALLOCATED_EVENTS;
ioss_evtconfig.period = TELEM_SAMPLING_DEFAULT_PERIOD;
ret = telemetry_setup_evtconfig(pss_evtconfig, ioss_evtconfig,
TELEM_RESET);
if (ret) {
dev_err(&pdev->dev, "TELEMTRY Setup Failed\n");
return ret;
}
return 0;
}
static int telemetry_plt_update_events(struct telemetry_evtconfig pss_evtconfig,
struct telemetry_evtconfig ioss_evtconfig)
{
int ret;
if ((pss_evtconfig.num_evts > 0) &&
(TELEM_SAMPLE_PERIOD_INVALID(pss_evtconfig.period))) {
pr_err("PSS Sampling Period Out of Range\n");
return -EINVAL;
}
if ((ioss_evtconfig.num_evts > 0) &&
(TELEM_SAMPLE_PERIOD_INVALID(ioss_evtconfig.period))) {
pr_err("IOSS Sampling Period Out of Range\n");
return -EINVAL;
}
ret = telemetry_setup_evtconfig(pss_evtconfig, ioss_evtconfig,
TELEM_UPDATE);
if (ret)
pr_err("TELEMTRY Config Failed\n");
return ret;
}
static int telemetry_plt_set_sampling_period(u8 pss_period, u8 ioss_period)
{
u32 telem_ctrl = 0;
int ret = 0;
mutex_lock(&(telm_conf->telem_lock));
if (ioss_period) {
if (TELEM_SAMPLE_PERIOD_INVALID(ioss_period)) {
pr_err("IOSS Sampling Period Out of Range\n");
ret = -EINVAL;
goto out;
}
/* Get telemetry EVENT CTL */
ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
IOSS_TELEM_EVENT_CTL_READ, NULL, 0,
&telem_ctrl, IOSS_TELEM_READ_WORD);
if (ret) {
pr_err("IOSS TELEM_CTRL Read Failed\n");
goto out;
}
/* Disable Telemetry */
TELEM_DISABLE(telem_ctrl);
ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
IOSS_TELEM_EVENT_CTL_WRITE,
(u8 *)&telem_ctrl,
IOSS_TELEM_EVT_CTRL_WRITE_SIZE,
NULL, 0);
if (ret) {
pr_err("IOSS TELEM_CTRL Event Disable Write Failed\n");
goto out;
}
/* Enable Periodic Telemetry Events and enable SRAM trace */
TELEM_CLEAR_SAMPLE_PERIOD(telem_ctrl);
TELEM_ENABLE_SRAM_EVT_TRACE(telem_ctrl);
TELEM_ENABLE_PERIODIC(telem_ctrl);
telem_ctrl |= ioss_period;
ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
IOSS_TELEM_EVENT_CTL_WRITE,
(u8 *)&telem_ctrl,
IOSS_TELEM_EVT_CTRL_WRITE_SIZE,
NULL, 0);
if (ret) {
pr_err("IOSS TELEM_CTRL Event Enable Write Failed\n");
goto out;
}
telm_conf->ioss_config.curr_period = ioss_period;
}
if (pss_period) {
if (TELEM_SAMPLE_PERIOD_INVALID(pss_period)) {
pr_err("PSS Sampling Period Out of Range\n");
ret = -EINVAL;
goto out;
}
/* Get telemetry EVENT CTL */
ret = intel_punit_ipc_command(
IPC_PUNIT_BIOS_READ_TELE_EVENT_CTRL,
0, 0, NULL, &telem_ctrl);
if (ret) {
pr_err("PSS TELEM_CTRL Read Failed\n");
goto out;
}
/* Disable Telemetry */
TELEM_DISABLE(telem_ctrl);
ret = intel_punit_ipc_command(
IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
0, 0, &telem_ctrl, NULL);
if (ret) {
pr_err("PSS TELEM_CTRL Event Disable Write Failed\n");
goto out;
}
/* Enable Periodic Telemetry Events and enable SRAM trace */
TELEM_CLEAR_SAMPLE_PERIOD(telem_ctrl);
TELEM_ENABLE_SRAM_EVT_TRACE(telem_ctrl);
TELEM_ENABLE_PERIODIC(telem_ctrl);
telem_ctrl |= pss_period;
ret = intel_punit_ipc_command(
IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
0, 0, &telem_ctrl, NULL);
if (ret) {
pr_err("PSS TELEM_CTRL Event Enable Write Failed\n");
goto out;
}
telm_conf->pss_config.curr_period = pss_period;
}
out:
mutex_unlock(&(telm_conf->telem_lock));
return ret;
}
static int telemetry_plt_get_sampling_period(u8 *pss_min_period,
u8 *pss_max_period,
u8 *ioss_min_period,
u8 *ioss_max_period)
{
*pss_min_period = telm_conf->pss_config.min_period;
*pss_max_period = telm_conf->pss_config.max_period;
*ioss_min_period = telm_conf->ioss_config.min_period;
*ioss_max_period = telm_conf->ioss_config.max_period;
return 0;
}
static int telemetry_plt_reset_events(void)
{
struct telemetry_evtconfig pss_evtconfig, ioss_evtconfig;
int ret;
pss_evtconfig.evtmap = NULL;
pss_evtconfig.num_evts = TELEM_MAX_OS_ALLOCATED_EVENTS;
pss_evtconfig.period = TELEM_SAMPLING_DEFAULT_PERIOD;
ioss_evtconfig.evtmap = NULL;
ioss_evtconfig.num_evts = TELEM_MAX_OS_ALLOCATED_EVENTS;
ioss_evtconfig.period = TELEM_SAMPLING_DEFAULT_PERIOD;
ret = telemetry_setup_evtconfig(pss_evtconfig, ioss_evtconfig,
TELEM_RESET);
if (ret)
pr_err("TELEMTRY Reset Failed\n");
return ret;
}
static int telemetry_plt_get_eventconfig(struct telemetry_evtconfig *pss_config,
struct telemetry_evtconfig *ioss_config,
int pss_len, int ioss_len)
{
u32 *pss_evtmap, *ioss_evtmap;
u32 index;
pss_evtmap = pss_config->evtmap;
ioss_evtmap = ioss_config->evtmap;
mutex_lock(&(telm_conf->telem_lock));
pss_config->num_evts = telm_conf->pss_config.ssram_evts_used;
ioss_config->num_evts = telm_conf->ioss_config.ssram_evts_used;
pss_config->period = telm_conf->pss_config.curr_period;
ioss_config->period = telm_conf->ioss_config.curr_period;
if ((pss_len < telm_conf->pss_config.ssram_evts_used) ||
(ioss_len < telm_conf->ioss_config.ssram_evts_used)) {
mutex_unlock(&(telm_conf->telem_lock));
return -EINVAL;
}
for (index = 0; index < telm_conf->pss_config.ssram_evts_used;
index++) {
pss_evtmap[index] =
telm_conf->pss_config.telem_evts[index].evt_id;
}
for (index = 0; index < telm_conf->ioss_config.ssram_evts_used;
index++) {
ioss_evtmap[index] =
telm_conf->ioss_config.telem_evts[index].evt_id;
}
mutex_unlock(&(telm_conf->telem_lock));
return 0;
}
static int telemetry_plt_add_events(u8 num_pss_evts, u8 num_ioss_evts,
u32 *pss_evtmap, u32 *ioss_evtmap)
{
struct telemetry_evtconfig pss_evtconfig, ioss_evtconfig;
int ret;
pss_evtconfig.evtmap = pss_evtmap;
pss_evtconfig.num_evts = num_pss_evts;
pss_evtconfig.period = telm_conf->pss_config.curr_period;
ioss_evtconfig.evtmap = ioss_evtmap;
ioss_evtconfig.num_evts = num_ioss_evts;
ioss_evtconfig.period = telm_conf->ioss_config.curr_period;
ret = telemetry_setup_evtconfig(pss_evtconfig, ioss_evtconfig,
TELEM_ADD);
if (ret)
pr_err("TELEMTRY ADD Failed\n");
return ret;
}
static int telem_evtlog_read(enum telemetry_unit telem_unit,
struct telem_ssram_region *ssram_region, u8 len)
{
struct telemetry_unit_config *unit_config;
u64 timestamp_prev, timestamp_next;
int ret, index, timeout = 0;
ret = telem_get_unitconfig(telem_unit, &unit_config);
if (ret < 0)
return ret;
if (len > unit_config->ssram_evts_used)
len = unit_config->ssram_evts_used;
do {
timestamp_prev = readq(unit_config->regmap);
if (!timestamp_prev) {
pr_err("Ssram under update. Please Try Later\n");
return -EBUSY;
}
ssram_region->start_time = readq(unit_config->regmap +
TELEM_SSRAM_STARTTIME_OFFSET);
for (index = 0; index < len; index++) {
ssram_region->events[index] =
readq(unit_config->regmap + TELEM_SSRAM_EVTLOG_OFFSET +
BYTES_PER_LONG*index);
}
timestamp_next = readq(unit_config->regmap);
if (!timestamp_next) {
pr_err("Ssram under update. Please Try Later\n");
return -EBUSY;
}
if (timeout++ > TELEM_SSRAM_READ_TIMEOUT) {
pr_err("Timeout while reading Events\n");
return -EBUSY;
}
} while (timestamp_prev != timestamp_next);
ssram_region->timestamp = timestamp_next;
return len;
}
static int telemetry_plt_raw_read_eventlog(enum telemetry_unit telem_unit,
struct telemetry_evtlog *evtlog,
int len, int log_all_evts)
{
int index, idx1, ret, readlen = len;
struct telem_ssram_region ssram_region;
struct telemetry_evtmap *evtmap;
switch (telem_unit) {
case TELEM_PSS:
evtmap = telm_conf->pss_config.telem_evts;
break;
case TELEM_IOSS:
evtmap = telm_conf->ioss_config.telem_evts;
break;
default:
pr_err("Unknown Telemetry Unit Specified %d\n", telem_unit);
return -EINVAL;
}
if (!log_all_evts)
readlen = TELEM_MAX_EVENTS_SRAM;
ret = telem_evtlog_read(telem_unit, &ssram_region, readlen);
if (ret < 0)
return ret;
/* Invalid evt-id array specified via length mismatch */
if ((!log_all_evts) && (len > ret))
return -EINVAL;
if (log_all_evts)
for (index = 0; index < ret; index++) {
evtlog[index].telem_evtlog = ssram_region.events[index];
evtlog[index].telem_evtid = evtmap[index].evt_id;
}
else
for (index = 0, readlen = 0; (index < ret) && (readlen < len);
index++) {
for (idx1 = 0; idx1 < len; idx1++) {
/* Elements matched */
if (evtmap[index].evt_id ==
evtlog[idx1].telem_evtid) {
evtlog[idx1].telem_evtlog =
ssram_region.events[index];
readlen++;
break;
}
}
}
return readlen;
}
static int telemetry_plt_read_eventlog(enum telemetry_unit telem_unit,
struct telemetry_evtlog *evtlog, int len, int log_all_evts)
{
int ret;
mutex_lock(&(telm_conf->telem_lock));
ret = telemetry_plt_raw_read_eventlog(telem_unit, evtlog,
len, log_all_evts);
mutex_unlock(&(telm_conf->telem_lock));
return ret;
}
static int telemetry_plt_get_trace_verbosity(enum telemetry_unit telem_unit,
u32 *verbosity)
{
u32 temp = 0;
int ret;
if (verbosity == NULL)
return -EINVAL;
mutex_lock(&(telm_conf->telem_trace_lock));
switch (telem_unit) {
case TELEM_PSS:
ret = intel_punit_ipc_command(
IPC_PUNIT_BIOS_READ_TELE_TRACE_CTRL,
0, 0, NULL, &temp);
if (ret) {
pr_err("PSS TRACE_CTRL Read Failed\n");
goto out;
}
break;
case TELEM_IOSS:
ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
IOSS_TELEM_TRACE_CTL_READ, NULL, 0, &temp,
IOSS_TELEM_READ_WORD);
if (ret) {
pr_err("IOSS TRACE_CTL Read Failed\n");
goto out;
}
break;
default:
pr_err("Unknown Telemetry Unit Specified %d\n", telem_unit);
ret = -EINVAL;
break;
}
TELEM_EXTRACT_VERBOSITY(temp, *verbosity);
out:
mutex_unlock(&(telm_conf->telem_trace_lock));
return ret;
}
static int telemetry_plt_set_trace_verbosity(enum telemetry_unit telem_unit,
u32 verbosity)
{
u32 temp = 0;
int ret;
verbosity &= TELEM_TRC_VERBOSITY_MASK;
mutex_lock(&(telm_conf->telem_trace_lock));
switch (telem_unit) {
case TELEM_PSS:
ret = intel_punit_ipc_command(
IPC_PUNIT_BIOS_READ_TELE_TRACE_CTRL,
0, 0, NULL, &temp);
if (ret) {
pr_err("PSS TRACE_CTRL Read Failed\n");
goto out;
}
TELEM_CLEAR_VERBOSITY_BITS(temp);
TELEM_SET_VERBOSITY_BITS(temp, verbosity);
ret = intel_punit_ipc_command(
IPC_PUNIT_BIOS_WRITE_TELE_TRACE_CTRL,
0, 0, &temp, NULL);
if (ret) {
pr_err("PSS TRACE_CTRL Verbosity Set Failed\n");
goto out;
}
break;
case TELEM_IOSS:
ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
IOSS_TELEM_TRACE_CTL_READ, NULL, 0, &temp,
IOSS_TELEM_READ_WORD);
if (ret) {
pr_err("IOSS TRACE_CTL Read Failed\n");
goto out;
}
TELEM_CLEAR_VERBOSITY_BITS(temp);
TELEM_SET_VERBOSITY_BITS(temp, verbosity);
ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
IOSS_TELEM_TRACE_CTL_WRITE, (u8 *)&temp,
IOSS_TELEM_WRITE_FOURBYTES, NULL, 0);
if (ret) {
pr_err("IOSS TRACE_CTL Verbosity Set Failed\n");
goto out;
}
break;
default:
pr_err("Unknown Telemetry Unit Specified %d\n", telem_unit);
ret = -EINVAL;
break;
}
out:
mutex_unlock(&(telm_conf->telem_trace_lock));
return ret;
}
static const struct telemetry_core_ops telm_pltops = {
.get_trace_verbosity = telemetry_plt_get_trace_verbosity,
.set_trace_verbosity = telemetry_plt_set_trace_verbosity,
.set_sampling_period = telemetry_plt_set_sampling_period,
.get_sampling_period = telemetry_plt_get_sampling_period,
.raw_read_eventlog = telemetry_plt_raw_read_eventlog,
.get_eventconfig = telemetry_plt_get_eventconfig,
.update_events = telemetry_plt_update_events,
.read_eventlog = telemetry_plt_read_eventlog,
.reset_events = telemetry_plt_reset_events,
.add_events = telemetry_plt_add_events,
};
static int telemetry_pltdrv_probe(struct platform_device *pdev)
{
struct resource *res0 = NULL, *res1 = NULL;
const struct x86_cpu_id *id;
int size, ret = -ENOMEM;
id = x86_match_cpu(telemetry_cpu_ids);
if (!id)
return -ENODEV;
telm_conf = (struct telemetry_plt_config *)id->driver_data;
res0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res0) {
ret = -EINVAL;
goto out;
}
size = resource_size(res0);
if (!devm_request_mem_region(&pdev->dev, res0->start, size,
pdev->name)) {
ret = -EBUSY;
goto out;
}
telm_conf->pss_config.ssram_base_addr = res0->start;
telm_conf->pss_config.ssram_size = size;
res1 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (!res1) {
ret = -EINVAL;
goto out;
}
size = resource_size(res1);
if (!devm_request_mem_region(&pdev->dev, res1->start, size,
pdev->name)) {
ret = -EBUSY;
goto out;
}
telm_conf->ioss_config.ssram_base_addr = res1->start;
telm_conf->ioss_config.ssram_size = size;
telm_conf->pss_config.regmap = ioremap_nocache(
telm_conf->pss_config.ssram_base_addr,
telm_conf->pss_config.ssram_size);
if (!telm_conf->pss_config.regmap) {
ret = -ENOMEM;
goto out;
}
telm_conf->ioss_config.regmap = ioremap_nocache(
telm_conf->ioss_config.ssram_base_addr,
telm_conf->ioss_config.ssram_size);
if (!telm_conf->ioss_config.regmap) {
ret = -ENOMEM;
goto out;
}
mutex_init(&telm_conf->telem_lock);
mutex_init(&telm_conf->telem_trace_lock);
ret = telemetry_setup(pdev);
if (ret)
goto out;
ret = telemetry_set_pltdata(&telm_pltops, telm_conf);
if (ret) {
dev_err(&pdev->dev, "TELEMTRY Set Pltops Failed.\n");
goto out;
}
return 0;
out:
if (res0)
release_mem_region(res0->start, resource_size(res0));
if (res1)
release_mem_region(res1->start, resource_size(res1));
if (telm_conf->pss_config.regmap)
iounmap(telm_conf->pss_config.regmap);
if (telm_conf->ioss_config.regmap)
iounmap(telm_conf->ioss_config.regmap);
dev_err(&pdev->dev, "TELEMTRY Setup Failed.\n");
return ret;
}
static int telemetry_pltdrv_remove(struct platform_device *pdev)
{
telemetry_clear_pltdata();
iounmap(telm_conf->pss_config.regmap);
iounmap(telm_conf->ioss_config.regmap);
return 0;
}
static struct platform_driver telemetry_soc_driver = {
.probe = telemetry_pltdrv_probe,
.remove = telemetry_pltdrv_remove,
.driver = {
.name = DRIVER_NAME,
},
};
static int __init telemetry_module_init(void)
{
pr_info(DRIVER_NAME ": version %s loaded\n", DRIVER_VERSION);
return platform_driver_register(&telemetry_soc_driver);
}
static void __exit telemetry_module_exit(void)
{
platform_driver_unregister(&telemetry_soc_driver);
}
device_initcall(telemetry_module_init);
module_exit(telemetry_module_exit);
MODULE_AUTHOR("Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>");
MODULE_DESCRIPTION("Intel SoC Telemetry Platform Driver");
MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL");
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