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/*
* Copyright (c) 2012-2017 The Linux Foundation. All rights reserved.
*
* Previously licensed under the ISC license by Qualcomm Atheros, Inc.
*
*
* Permission to use, copy, modify, and/or distribute this software for
* any purpose with or without fee is hereby granted, provided that the
* above copyright notice and this permission notice appear in all
* copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
* AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/*
* This file was originally distributed by Qualcomm Atheros, Inc.
* under proprietary terms before Copyright ownership was assigned
* to the Linux Foundation.
*/
/**
* DOC: qdf_perf
* This file provides OS dependent perf API's.
*/
#include <linux/version.h>
#include <linux/kernel.h>
#include <asm/uaccess.h>
#include <linux/fs.h>
#include <linux/proc_fs.h>
#include <linux/vmalloc.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <qdf_perf.h>
#include <qdf_module.h>
#ifdef QCA_PERF_PROFILING
qdf_perf_entry_t perf_root = {{0, 0} };
/**
* qdf_perfmod_init() - Module init
*
* return: int
*/
int
qdf_perfmod_init(void)
{
QDF_TRACE(QDF_MODULE_ID_QDF, QDF_TRACE_LEVEL_INFO,
"Perf Debug Module Init");
INIT_LIST_HEAD(&perf_root.list);
INIT_LIST_HEAD(&perf_root.child);
perf_root.proc = proc_mkdir(PROCFS_PERF_DIRNAME, 0);
return 0;
}
qdf_export_symbol(qdf_perfmod_init);
/**
* qdf_perfmod_exit() - Module exit
*
* Return: none
*/
void
qdf_perfmod_exit(void)
{
QDF_TRACE(QDF_MODULE_ID_QDF, QDF_TRACE_LEVEL_INFO,
"Perf Debug Module Exit");
remove_proc_entry(PROCFS_PERF_DIRNAME, 0);
}
qdf_export_symbol(qdf_perfmod_exit);
/**
* __qdf_perf_init() - Create the perf entry
* @parent: parent perf id
* @id_name: name of perf id
* @type: type of perf counter
*
* return: perf id
*/
qdf_perf_id_t
__qdf_perf_init(qdf_perf_id_t parent, uint8_t *id_name,
qdf_perf_cntr_t type)
{
qdf_perf_entry_t *entry = NULL;
qdf_perf_entry_t *pentry = PERF_ENTRY(parent);
if (type >= CNTR_LAST) {
QDF_TRACE(QDF_MODULE_ID_QDF, QDF_TRACE_LEVEL_ERROR,
"%s:%s Invalid perf-type", __FILE__, __func__);
goto done;
}
if (!pentry)
pentry = &perf_root;
entry = kmalloc(sizeof(struct qdf_perf_entry), GFP_ATOMIC);
if (!entry) {
QDF_TRACE(QDF_MODULE_ID_QDF, QDF_TRACE_LEVEL_ERROR,
" Out of Memory,:%s", __func__);
return NULL;
}
memset(entry, 0, sizeof(struct qdf_perf_entry));
INIT_LIST_HEAD(&entry->list);
INIT_LIST_HEAD(&entry->child);
spin_lock_init(&entry->lock_irq);
list_add_tail(&entry->list, &pentry->child);
entry->name = id_name;
entry->type = type;
if (type == CNTR_GROUP) {
entry->proc = proc_mkdir(id_name, pentry->proc);
goto done;
}
entry->parent = pentry;
entry->proc = create_proc_entry(id_name, S_IFREG|S_IRUGO|S_IWUSR,
pentry->proc);
entry->proc->data = entry;
entry->proc->read_proc = api_tbl[type].proc_read;
entry->proc->write_proc = api_tbl[type].proc_write;
/*
* Initialize the Event with default values
*/
api_tbl[type].init(entry, api_tbl[type].def_val);
done:
return entry;
}
qdf_export_symbol(__qdf_perf_init);
/**
* __qdf_perf_destroy - Destroy the perf entry
* @id: pointer to qdf_perf_id_t
*
* @return: bool
*/
bool __qdf_perf_destroy(qdf_perf_id_t id)
{
qdf_perf_entry_t *entry = PERF_ENTRY(id),
*parent = entry->parent;
if (!list_empty(&entry->child)) {
QDF_TRACE(QDF_MODULE_ID_QDF, QDF_TRACE_LEVEL_ERROR,
"Child's are alive, Can't delete");
return A_FALSE;
}
remove_proc_entry(entry->name, parent->proc);
list_del(&entry->list);
vfree(entry);
return true;
}
qdf_export_symbol(__qdf_perf_destroy);
/**
* __qdf_perf_start - Start the sampling
* @id: Instance of qdf_perf_id_t
*
* Returns: none
*/
void __qdf_perf_start(qdf_perf_id_t id)
{
qdf_perf_entry_t *entry = PERF_ENTRY(id);
api_tbl[entry->type].sample(entry, 0);
}
qdf_export_symbol(__qdf_perf_start);
/**
* __qdf_perf_end - Stop sampling
* @id: Instance of qdf_perf_id_t
*
* Returns: none
*/
void __qdf_perf_end(qdf_perf_id_t id)
{
qdf_perf_entry_t *entry = PERF_ENTRY(id);
api_tbl[entry->type].sample(entry, 1);
}
qdf_export_symbol(__qdf_perf_end);
#endif /* QCA_PERF_PROFILING */
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