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#include <linux/device.h>
#include <linux/module.h>
#include <linux/uaccess.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/earlysuspend.h>
#include <linux/sched.h>
#include "mach/mt_emi_bm.h"
#include "mach/mt_dcm.h"
#include "mach/mt_mem_bw.h"
#include <asm/div64.h>
unsigned long long last_time_ns;
long long LastWordAllCount=0;
/***********************************************
* register / unregister g_pGetMemBW CB
***********************************************/
static getmembw_func g_pGetMemBW = NULL;
void mt_getmembw_registerCB(getmembw_func pCB)
{
if (pCB == NULL) {
/* reset last time & word all count */
last_time_ns = sched_clock();
LastWordAllCount = 0;
}
g_pGetMemBW = pCB;
}
EXPORT_SYMBOL(mt_getmembw_registerCB);
unsigned long long get_mem_bw(void)
{
unsigned long long throughput;
long long WordAllCount;
unsigned long long current_time_ns, time_period_ns;
int count;
long long value;
int emi_dcm_disable;
#if DISABLE_FLIPPER_FUNC
return 0;
#endif
if (g_pGetMemBW)
return g_pGetMemBW();
emi_dcm_disable = BM_GetEmiDcm();
//printk("[get_mem_bw]emi_dcm_disable = %d\n", emi_dcm_disable);
current_time_ns = sched_clock();
time_period_ns = current_time_ns - last_time_ns;
//printk("[get_mem_bw]last_time=%llu, current_time=%llu, period=%llu\n", last_time_ns, current_time_ns, time_period_ns);
//disable_infra_dcm();
BM_SetEmiDcm(0xff); //disable EMI dcm
BM_Pause();
WordAllCount = BM_GetWordAllCount();
if(WordAllCount == 0)
{
LastWordAllCount = 0;
}
else if (WordAllCount == BM_ERR_OVERRUN)
{
pr_debug("[get_mem_bw] BM_ERR_OVERRUN\n");
WordAllCount = 0;
LastWordAllCount = 0;
BM_Enable(0); // stopping EMI monitors will reset all counters
BM_Enable(1); // start EMI monitor counting
}
WordAllCount -= LastWordAllCount;
throughput = (WordAllCount * 8 * 1000);
if (time_period_ns >= 4294967295) //uint32_t overflow
{
do_div(time_period_ns,10000000);
do_div(throughput,10000000);
pr_debug("[get_mem_bw] time_period_ns overflow lst\n");
//printk("[get_mem_bw] time_period_ns overflow 1st\n");
if (time_period_ns >= 4294967295) //uint32_t still overflow
{
do_div(time_period_ns,1000);
do_div(throughput,1000);
pr_debug("[get_mem_bw] time_period_ns overflow 2nd\n");
//printk("[get_mem_bw] time_period_ns overflow 2nd\n");
}
}
do_div(throughput,time_period_ns);
//printk("[get_mem_bw]Total MEMORY THROUGHPUT =%llu(MB/s), WordAllCount_delta = 0x%llx, LastWordAllCount = 0x%llx\n",throughput, WordAllCount, LastWordAllCount);
// stopping EMI monitors will reset all counters
BM_Enable(0);
value = BM_GetWordAllCount();
count = 100;
if((value != 0) && (value > 0xB0000000))
{
do
{
if((value = BM_GetWordAllCount()) != 0)
{
count--;
BM_Enable(1);
BM_Enable(0);
}
else
{
break;
}
}while(count > 0);
}
LastWordAllCount = value;
//printk("[get_mem_bw]loop count = %d, last_word_all_count = 0x%llx\n", count, LastWordAllCount);
// start EMI monitor counting
BM_Enable(1);
last_time_ns = sched_clock();
//restore_infra_dcm();
BM_SetEmiDcm(emi_dcm_disable);
//printk("[get_mem_bw]throughput = %llx\n", throughput);
return throughput;
}
static int mem_bw_suspend_callback(struct device *dev)
{
//printk("[get_mem_bw]mem_bw_suspend_callback \n");
LastWordAllCount = 0;
BM_Pause();
return 0;
}
static int mem_bw_resume_callback(struct device *dev)
{
//printk("[get_mem_bw]mem_bw_resume_callback \n");
BM_Continue();
return 0;
}
struct dev_pm_ops mt_mem_bw_pm_ops = {
.suspend = mem_bw_suspend_callback,
.resume = mem_bw_resume_callback,
.restore_early = NULL,
};
struct platform_device mt_mem_bw_pdev = {
.name = "mt-mem_bw",
.id = -1,
};
static struct platform_driver mt_mem_bw_pdrv = {
.probe = NULL,
.remove = NULL,
.driver = {
.name = "mt-mem_bw",
.pm = &mt_mem_bw_pm_ops,
.owner = THIS_MODULE,
},
};
static int __init mon_kernel_init(void)
{
int ret = 0;
int emi_dcm_disable;
BM_Init();
//disable_infra_dcm();
emi_dcm_disable = BM_GetEmiDcm();
//printk("[MT_MEM_BW]emi_dcm_disable = %d\n", emi_dcm_disable);
BM_SetEmiDcm(0xff); //disable EMI dcm
BM_SetReadWriteType(BM_BOTH_READ_WRITE);
BM_SetMonitorCounter(1, BM_MASTER_MM1 | BM_MASTER_MM1, BM_TRANS_TYPE_4BEAT | BM_TRANS_TYPE_8Byte | BM_TRANS_TYPE_BURST_WRAP);
BM_SetMonitorCounter(2, BM_MASTER_AP_MCU1 | BM_MASTER_AP_MCU2, BM_TRANS_TYPE_4BEAT | BM_TRANS_TYPE_8Byte | BM_TRANS_TYPE_BURST_WRAP);
BM_SetMonitorCounter(3, BM_MASTER_MD_MCU | BM_MASTER_2G_3G_MDDMA, BM_TRANS_TYPE_4BEAT | BM_TRANS_TYPE_8Byte | BM_TRANS_TYPE_BURST_WRAP);
BM_SetMonitorCounter(4, BM_MASTER_GPU1 | BM_MASTER_GPU1, BM_TRANS_TYPE_4BEAT | BM_TRANS_TYPE_8Byte | BM_TRANS_TYPE_BURST_WRAP);
BM_SetLatencyCounter();
// stopping EMI monitors will reset all counters
BM_Enable(0);
// start EMI monitor counting
BM_Enable(1);
last_time_ns = sched_clock();
//restore_infra_dcm();
BM_SetEmiDcm(emi_dcm_disable); //enable EMI dcm
/* register platform device/driver */
ret = platform_device_register(&mt_mem_bw_pdev);
if (ret) {
printk("fail to register mem_bw device @ %s()\n", __func__);
goto out;
}
ret = platform_driver_register(&mt_mem_bw_pdrv);
if (ret) {
printk("fail to register mem_bw driver @ %s()\n", __func__);
platform_device_unregister(&mt_mem_bw_pdev);
}
out:
return ret;
}
static void __exit mon_kernel_exit(void)
{
return;
}
module_init(mon_kernel_init);
module_exit(mon_kernel_exit);
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