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-rw-r--r--drivers/platform/x86/Kconfig11
-rw-r--r--drivers/platform/x86/Makefile1
-rw-r--r--drivers/platform/x86/intel_telemetry_core.c464
3 files changed, 476 insertions, 0 deletions
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index f37821f004f9..d72b14809d7e 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -977,4 +977,15 @@ config INTEL_PUNIT_IPC
---help---
This driver provides support for Intel P-Unit Mailbox IPC mechanism,
which is used to bridge the communications between kernel and P-Unit.
+
+config INTEL_TELEMETRY
+ tristate "Intel SoC Telemetry Driver"
+ default n
+ depends on INTEL_PMC_IPC && INTEL_PUNIT_IPC && X86_64
+ ---help---
+ This driver provides interfaces to configure and use
+ telemetry for INTEL SoC from APL onwards. It is also
+ used to get various SoC events and parameters
+ directly via debugfs files. Various tools may use
+ this interface for SoC state monitoring.
endif # X86_PLATFORM_DEVICES
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index 8b8df29dc502..9277ce52d375 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -65,3 +65,4 @@ obj-$(CONFIG_ALIENWARE_WMI) += alienware-wmi.o
obj-$(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
diff --git a/drivers/platform/x86/intel_telemetry_core.c b/drivers/platform/x86/intel_telemetry_core.c
new file mode 100644
index 000000000000..a695a436a1c3
--- /dev/null
+++ b/drivers/platform/x86/intel_telemetry_core.c
@@ -0,0 +1,464 @@
+/*
+ * Intel SoC Core Telemetry Driver
+ * 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.
+ *
+ * Telemetry Framework provides platform related PM and performance statistics.
+ * This file provides the core telemetry API implementation.
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+
+#include <asm/intel_telemetry.h>
+
+#define DRIVER_NAME "intel_telemetry_core"
+
+struct telemetry_core_config {
+ struct telemetry_plt_config *plt_config;
+ struct telemetry_core_ops *telem_ops;
+};
+
+static struct telemetry_core_config telm_core_conf;
+
+static int telemetry_def_update_events(struct telemetry_evtconfig pss_evtconfig,
+ struct telemetry_evtconfig ioss_evtconfig)
+{
+ return 0;
+}
+
+static int telemetry_def_set_sampling_period(u8 pss_period, u8 ioss_period)
+{
+ return 0;
+}
+
+static int telemetry_def_get_sampling_period(u8 *pss_min_period,
+ u8 *pss_max_period,
+ u8 *ioss_min_period,
+ u8 *ioss_max_period)
+{
+ return 0;
+}
+
+static int telemetry_def_get_eventconfig(
+ struct telemetry_evtconfig *pss_evtconfig,
+ struct telemetry_evtconfig *ioss_evtconfig,
+ int pss_len, int ioss_len)
+{
+ return 0;
+}
+
+static int telemetry_def_get_trace_verbosity(enum telemetry_unit telem_unit,
+ u32 *verbosity)
+{
+ return 0;
+}
+
+
+static int telemetry_def_set_trace_verbosity(enum telemetry_unit telem_unit,
+ u32 verbosity)
+{
+ return 0;
+}
+
+static int telemetry_def_raw_read_eventlog(enum telemetry_unit telem_unit,
+ struct telemetry_evtlog *evtlog,
+ int len, int log_all_evts)
+{
+ return 0;
+}
+
+static int telemetry_def_read_eventlog(enum telemetry_unit telem_unit,
+ struct telemetry_evtlog *evtlog,
+ int len, int log_all_evts)
+{
+ return 0;
+}
+
+static int telemetry_def_add_events(u8 num_pss_evts, u8 num_ioss_evts,
+ u32 *pss_evtmap, u32 *ioss_evtmap)
+{
+ return 0;
+}
+
+static int telemetry_def_reset_events(void)
+{
+ return 0;
+}
+
+static struct telemetry_core_ops telm_defpltops = {
+ .set_sampling_period = telemetry_def_set_sampling_period,
+ .get_sampling_period = telemetry_def_get_sampling_period,
+ .get_trace_verbosity = telemetry_def_get_trace_verbosity,
+ .set_trace_verbosity = telemetry_def_set_trace_verbosity,
+ .raw_read_eventlog = telemetry_def_raw_read_eventlog,
+ .get_eventconfig = telemetry_def_get_eventconfig,
+ .read_eventlog = telemetry_def_read_eventlog,
+ .update_events = telemetry_def_update_events,
+ .reset_events = telemetry_def_reset_events,
+ .add_events = telemetry_def_add_events,
+};
+
+/**
+ * telemetry_update_events() - Update telemetry Configuration
+ * @pss_evtconfig: PSS related config. No change if num_evts = 0.
+ * @pss_evtconfig: IOSS related config. No change if num_evts = 0.
+ *
+ * This API updates the IOSS & PSS Telemetry configuration. Old config
+ * is overwritten. Call telemetry_reset_events when logging is over
+ * All sample period values should be in the form of:
+ * bits[6:3] -> value; bits [0:2]-> Exponent; Period = (Value *16^Exponent)
+ *
+ * Return: 0 success, < 0 for failure
+ */
+int telemetry_update_events(struct telemetry_evtconfig pss_evtconfig,
+ struct telemetry_evtconfig ioss_evtconfig)
+{
+ return telm_core_conf.telem_ops->update_events(pss_evtconfig,
+ ioss_evtconfig);
+}
+EXPORT_SYMBOL_GPL(telemetry_update_events);
+
+
+/**
+ * telemetry_set_sampling_period() - Sets the IOSS & PSS sampling period
+ * @pss_period: placeholder for PSS Period to be set.
+ * Set to 0 if not required to be updated
+ * @ioss_period: placeholder for IOSS Period to be set
+ * Set to 0 if not required to be updated
+ *
+ * All values should be in the form of:
+ * bits[6:3] -> value; bits [0:2]-> Exponent; Period = (Value *16^Exponent)
+ *
+ * Return: 0 success, < 0 for failure
+ */
+int telemetry_set_sampling_period(u8 pss_period, u8 ioss_period)
+{
+ return telm_core_conf.telem_ops->set_sampling_period(pss_period,
+ ioss_period);
+}
+EXPORT_SYMBOL_GPL(telemetry_set_sampling_period);
+
+/**
+ * telemetry_get_sampling_period() - Get IOSS & PSS min & max sampling period
+ * @pss_min_period: placeholder for PSS Min Period supported
+ * @pss_max_period: placeholder for PSS Max Period supported
+ * @ioss_min_period: placeholder for IOSS Min Period supported
+ * @ioss_max_period: placeholder for IOSS Max Period supported
+ *
+ * All values should be in the form of:
+ * bits[6:3] -> value; bits [0:2]-> Exponent; Period = (Value *16^Exponent)
+ *
+ * Return: 0 success, < 0 for failure
+ */
+int telemetry_get_sampling_period(u8 *pss_min_period, u8 *pss_max_period,
+ u8 *ioss_min_period, u8 *ioss_max_period)
+{
+ return telm_core_conf.telem_ops->get_sampling_period(pss_min_period,
+ pss_max_period,
+ ioss_min_period,
+ ioss_max_period);
+}
+EXPORT_SYMBOL_GPL(telemetry_get_sampling_period);
+
+
+/**
+ * telemetry_reset_events() - Restore the IOSS & PSS configuration to default
+ *
+ * Return: 0 success, < 0 for failure
+ */
+int telemetry_reset_events(void)
+{
+ return telm_core_conf.telem_ops->reset_events();
+}
+EXPORT_SYMBOL_GPL(telemetry_reset_events);
+
+/**
+ * telemetry_get_eventconfig() - Returns the pss and ioss events enabled
+ * @pss_evtconfig: Pointer to PSS related configuration.
+ * @pss_evtconfig: Pointer to IOSS related configuration.
+ * @pss_len: Number of u32 elements allocated for pss_evtconfig array
+ * @ioss_len: Number of u32 elements allocated for ioss_evtconfig array
+ *
+ * Return: 0 success, < 0 for failure
+ */
+int telemetry_get_eventconfig(struct telemetry_evtconfig *pss_evtconfig,
+ struct telemetry_evtconfig *ioss_evtconfig,
+ int pss_len, int ioss_len)
+{
+ return telm_core_conf.telem_ops->get_eventconfig(pss_evtconfig,
+ ioss_evtconfig,
+ pss_len, ioss_len);
+}
+EXPORT_SYMBOL_GPL(telemetry_get_eventconfig);
+
+/**
+ * telemetry_add_events() - Add IOSS & PSS configuration to existing settings.
+ * @num_pss_evts: Number of PSS Events (<29) in pss_evtmap. Can be 0.
+ * @num_ioss_evts: Number of IOSS Events (<29) in ioss_evtmap. Can be 0.
+ * @pss_evtmap: Array of PSS Event-IDs to Enable
+ * @ioss_evtmap: Array of PSS Event-IDs to Enable
+ *
+ * Events are appended to Old Configuration. In case of total events > 28, it
+ * returns error. Call telemetry_reset_events to reset after eventlog done
+ *
+ * Return: 0 success, < 0 for failure
+ */
+int telemetry_add_events(u8 num_pss_evts, u8 num_ioss_evts,
+ u32 *pss_evtmap, u32 *ioss_evtmap)
+{
+ return telm_core_conf.telem_ops->add_events(num_pss_evts,
+ num_ioss_evts, pss_evtmap,
+ ioss_evtmap);
+}
+EXPORT_SYMBOL_GPL(telemetry_add_events);
+
+/**
+ * telemetry_read_events() - Fetches samples as specified by evtlog.telem_evt_id
+ * @telem_unit: Specify whether IOSS or PSS Read
+ * @evtlog: Array of telemetry_evtlog structs to fill data
+ * evtlog.telem_evt_id specifies the ids to read
+ * @len: Length of array of evtlog
+ *
+ * Return: number of eventlogs read for success, < 0 for failure
+ */
+int telemetry_read_events(enum telemetry_unit telem_unit,
+ struct telemetry_evtlog *evtlog, int len)
+{
+ return telm_core_conf.telem_ops->read_eventlog(telem_unit, evtlog,
+ len, 0);
+}
+EXPORT_SYMBOL_GPL(telemetry_read_events);
+
+/**
+ * telemetry_raw_read_events() - Fetch samples specified by evtlog.telem_evt_id
+ * @telem_unit: Specify whether IOSS or PSS Read
+ * @evtlog: Array of telemetry_evtlog structs to fill data
+ * evtlog.telem_evt_id specifies the ids to read
+ * @len: Length of array of evtlog
+ *
+ * The caller must take care of locking in this case.
+ *
+ * Return: number of eventlogs read for success, < 0 for failure
+ */
+int telemetry_raw_read_events(enum telemetry_unit telem_unit,
+ struct telemetry_evtlog *evtlog, int len)
+{
+ return telm_core_conf.telem_ops->raw_read_eventlog(telem_unit, evtlog,
+ len, 0);
+}
+EXPORT_SYMBOL_GPL(telemetry_raw_read_events);
+
+/**
+ * telemetry_read_eventlog() - Fetch the Telemetry log from PSS or IOSS
+ * @telem_unit: Specify whether IOSS or PSS Read
+ * @evtlog: Array of telemetry_evtlog structs to fill data
+ * @len: Length of array of evtlog
+ *
+ * Return: number of eventlogs read for success, < 0 for failure
+ */
+int telemetry_read_eventlog(enum telemetry_unit telem_unit,
+ struct telemetry_evtlog *evtlog, int len)
+{
+ return telm_core_conf.telem_ops->read_eventlog(telem_unit, evtlog,
+ len, 1);
+}
+EXPORT_SYMBOL_GPL(telemetry_read_eventlog);
+
+/**
+ * telemetry_raw_read_eventlog() - Fetch the Telemetry log from PSS or IOSS
+ * @telem_unit: Specify whether IOSS or PSS Read
+ * @evtlog: Array of telemetry_evtlog structs to fill data
+ * @len: Length of array of evtlog
+ *
+ * The caller must take care of locking in this case.
+ *
+ * Return: number of eventlogs read for success, < 0 for failure
+ */
+int telemetry_raw_read_eventlog(enum telemetry_unit telem_unit,
+ struct telemetry_evtlog *evtlog, int len)
+{
+ return telm_core_conf.telem_ops->raw_read_eventlog(telem_unit, evtlog,
+ len, 1);
+}
+EXPORT_SYMBOL_GPL(telemetry_raw_read_eventlog);
+
+
+/**
+ * telemetry_get_trace_verbosity() - Get the IOSS & PSS Trace verbosity
+ * @telem_unit: Specify whether IOSS or PSS Read
+ * @verbosity: Pointer to return Verbosity
+ *
+ * Return: 0 success, < 0 for failure
+ */
+int telemetry_get_trace_verbosity(enum telemetry_unit telem_unit,
+ u32 *verbosity)
+{
+ return telm_core_conf.telem_ops->get_trace_verbosity(telem_unit,
+ verbosity);
+}
+EXPORT_SYMBOL_GPL(telemetry_get_trace_verbosity);
+
+
+/**
+ * telemetry_set_trace_verbosity() - Update the IOSS & PSS Trace verbosity
+ * @telem_unit: Specify whether IOSS or PSS Read
+ * @verbosity: Verbosity to set
+ *
+ * Return: 0 success, < 0 for failure
+ */
+int telemetry_set_trace_verbosity(enum telemetry_unit telem_unit, u32 verbosity)
+{
+ return telm_core_conf.telem_ops->set_trace_verbosity(telem_unit,
+ verbosity);
+}
+EXPORT_SYMBOL_GPL(telemetry_set_trace_verbosity);
+
+/**
+ * telemetry_set_pltdata() - Set the platform specific Data
+ * @ops: Pointer to ops structure
+ * @pltconfig: Platform config data
+ *
+ * Usage by other than telemetry pltdrv module is invalid
+ *
+ * Return: 0 success, < 0 for failure
+ */
+int telemetry_set_pltdata(struct telemetry_core_ops *ops,
+ struct telemetry_plt_config *pltconfig)
+{
+ if (ops)
+ telm_core_conf.telem_ops = ops;
+
+ if (pltconfig)
+ telm_core_conf.plt_config = pltconfig;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(telemetry_set_pltdata);
+
+/**
+ * telemetry_clear_pltdata() - Clear the platform specific Data
+ *
+ * Usage by other than telemetry pltdrv module is invalid
+ *
+ * Return: 0 success, < 0 for failure
+ */
+int telemetry_clear_pltdata(void)
+{
+ telm_core_conf.telem_ops = &telm_defpltops;
+ telm_core_conf.plt_config = NULL;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(telemetry_clear_pltdata);
+
+/**
+ * telemetry_pltconfig_valid() - Checkif platform config is valid
+ *
+ * Usage by other than telemetry module is invalid
+ *
+ * Return: 0 success, < 0 for failure
+ */
+int telemetry_pltconfig_valid(void)
+{
+ if (telm_core_conf.plt_config)
+ return 0;
+
+ else
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(telemetry_pltconfig_valid);
+
+static inline int telemetry_get_pssevtname(enum telemetry_unit telem_unit,
+ const char **name, int len)
+{
+ struct telemetry_unit_config psscfg;
+ int i;
+
+ if (!telm_core_conf.plt_config)
+ return -EINVAL;
+
+ psscfg = telm_core_conf.plt_config->pss_config;
+
+ if (len > psscfg.ssram_evts_used)
+ len = psscfg.ssram_evts_used;
+
+ for (i = 0; i < len; i++)
+ name[i] = psscfg.telem_evts[i].name;
+
+ return 0;
+}
+
+static inline int telemetry_get_iossevtname(enum telemetry_unit telem_unit,
+ const char **name, int len)
+{
+ struct telemetry_unit_config iosscfg;
+ int i;
+
+ if (!(telm_core_conf.plt_config))
+ return -EINVAL;
+
+ iosscfg = telm_core_conf.plt_config->ioss_config;
+
+ if (len > iosscfg.ssram_evts_used)
+ len = iosscfg.ssram_evts_used;
+
+ for (i = 0; i < len; i++)
+ name[i] = iosscfg.telem_evts[i].name;
+
+ return 0;
+
+}
+
+/**
+ * telemetry_get_evtname() - Checkif platform config is valid
+ * @telem_unit: Telemetry Unit to check
+ * @name: Array of character pointers to contain name
+ * @len: length of array name provided by user
+ *
+ * Usage by other than telemetry debugfs module is invalid
+ *
+ * Return: 0 success, < 0 for failure
+ */
+int telemetry_get_evtname(enum telemetry_unit telem_unit,
+ const char **name, int len)
+{
+ int ret = -EINVAL;
+
+ if (telem_unit == TELEM_PSS)
+ ret = telemetry_get_pssevtname(telem_unit, name, len);
+
+ else if (telem_unit == TELEM_IOSS)
+ ret = telemetry_get_iossevtname(telem_unit, name, len);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(telemetry_get_evtname);
+
+static int __init telemetry_module_init(void)
+{
+ pr_info(pr_fmt(DRIVER_NAME) " Init\n");
+
+ telm_core_conf.telem_ops = &telm_defpltops;
+ return 0;
+}
+
+static void __exit telemetry_module_exit(void)
+{
+}
+
+module_init(telemetry_module_init);
+module_exit(telemetry_module_exit);
+
+MODULE_AUTHOR("Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>");
+MODULE_DESCRIPTION("Intel SoC Telemetry Interface");
+MODULE_LICENSE("GPL");