/* Exported to Kernel/Platform PM */
int pasr_exit(void)
{
enum mtkpasr_phase result;
IS_MTKPASR_ENABLED;
MTKPASR_START_PROFILE();
/* SR on / Disable DPD - State change: MTKPASR_ON(MTKPASR_DPD_ON) -> MTKPASR_EXITING */
result = mtkpasr_enablingSR();
MTKPASR_END_PROFILE();
if (result == MTKPASR_WRONG_STATE) {
mtkpasr_err("Wrong state!\n");
goto out;
}
MTKPASR_START_PROFILE();
/* RAM-to-RAM decompression - State change: MTKPASR_EXITING -> MTKPASR_OFF */
result = mtkpasr_exiting();
MTKPASR_END_PROFILE();
if (result == MTKPASR_WRONG_STATE) {
mtkpasr_err("Wrong state!\n");
} else if (result == MTKPASR_FAIL) {
printk(KERN_ERR"\n\n\n Some Fatal Error! \n\n\n");
}
out:
return 0;
}
/* Hook to Linux PM */
void mtkpasr_phaseone_ops(void)
{
IS_MTKPASR_ENABLED_NORV;
/* It means no need to apply this op (Simply for paging or other periodic wakeups) */
if (is_mtkpasr_triggered()) {
return;
}
MTKPASR_START_PROFILE();
#ifdef CONFIG_MTKPASR_MAFL
if (mtkpasr_no_phaseone_ops())
goto no_phaseone;
#endif
mtkpasr_info("\n");
/* Drop cache - linux/mm.h */
drop_pagecache();
#ifdef CONFIG_MTKPASR_MAFL
no_phaseone:
#endif
MTKPASR_END_PROFILE();
}
/* Hook to Linux PM */
void mtkpasr_phaseone_ops(void)
{
MTKPASR_START_PROFILE();
#ifdef CONFIG_MTKPASR_MAFL
if (mtkpasr_no_phaseone_ops())
goto no_phaseone;
#endif
mtkpasr_info("\n");
/* Drop cache - linux/mm.h */
drop_pagecache();
#ifdef CONFIG_MTKPASR_MAFL
no_phaseone:
#endif
MTKPASR_END_PROFILE();
}
/* Hook to Linux PM */
void mtkpasr_phaseone_ops(void)
{
struct wd_api *wd_api = NULL;
/* To restart wdt */
if (get_wd_api(&wd_api) == 0) {
mtkpasr_log("PASR kicks WDT!\n");
wd_api->wd_restart(WD_TYPE_NORMAL);
}
IS_MTKPASR_ENABLED_NORV;
/* It means no need to apply this op (Simply for paging or other periodic wakeups) */
if (is_mtkpasr_triggered()) {
return;
}
MTKPASR_START_PROFILE();
/* It will go to MTKPASR stage */
current->flags |= PF_MTKPASR;
/* Inform all other memory pools to release their memory */
try_to_shrink_slab();
/* It will leave MTKPASR stage */
current->flags &= ~PF_MTKPASR;
#ifdef CONFIG_MTKPASR_MAFL
if (mtkpasr_no_phaseone_ops())
goto no_phaseone;
#endif
mtkpasr_info("\n");
/* Drop cache - linux/mm.h */
drop_pagecache();
#ifdef CONFIG_MTKPASR_MAFL
no_phaseone:
#endif
MTKPASR_END_PROFILE();
}
/*
* Exported to Kernel/Platform PM -
* It will fail only when some pending wakeup source is detected.
* This op may enable irq, so we should recover it if needed.
*/
int pasr_enter(u32 *sr, u32 *dpd)
{
enum mtkpasr_phase result;
int ret = 0;
int irq_disabled = 0; /* MTKPASR_FLUSH -> drain_all_pages -> on_each_cpu_mask will enable local irq */
IS_MTKPASR_ENABLED;
/* Check whether we are in irq-disabled environment */
if (irqs_disabled()) {
irq_disabled = 1;
}
++mtkpasr_triggered;
/* It will go to MTKPASR stage */
current->flags |= PF_MTKPASR | PF_SWAPWRITE;
MTKPASR_START_PROFILE();
/* RAM-to-RAM compression - State change: MTKPASR_OFF -> MTKPASR_ENTERING -> MTKPASR_DISABLINGSR */
result = mtkpasr_entering();
MTKPASR_END_PROFILE();
/* It will leave MTKPASR stage */
current->flags &= ~(PF_MTKPASR | PF_SWAPWRITE);
/* Any pending wakeup source? */
if (result == MTKPASR_GET_WAKEUP) {
mtkpasr_restoring();
mtkpasr_err("PM: Failed to enter MTKPASR\n");
++failed_mtkpasr;
ret = -1;
goto out;
} else if (result == MTKPASR_WRONG_STATE) {
mtkpasr_reset_state();
mtkpasr_err("Wrong state!\n");
++failed_mtkpasr;
goto out;
}
MTKPASR_START_PROFILE();
/* SR-Off/DPD - Check which banks/ranks can enter PASR/DPD - State change:MTKPASR_DISABLINGSR -> MTKPASR_ON (-> MTKPASR_DPD_ON) */
result = mtkpasr_disablingSR(sr, dpd);
mtkpasr_sroff = *sr;
mtkpasr_dpd = *dpd;
MTKPASR_END_PROFILE();
/* To mask some banks */
set_mtkpasr_triggered();
*sr = *sr & mtkpasr_control;
if (result == MTKPASR_GET_WAKEUP) {
mtkpasr_restoring();
mtkpasr_err("PM: Failed to enter SR_OFF/DPD\n");
++failed_mtkpasr;
ret = -1;
goto out;
} else if (result == MTKPASR_WRONG_STATE) {
mtkpasr_reset_state();
mtkpasr_err("Wrong state!\n");
++failed_mtkpasr;
}
out:
/* Recover it to irq-disabled environment if needed */
if (irq_disabled == 1) {
if (!irqs_disabled()) {
mtkpasr_log("IRQ is enabled! To disable it here!\n");
arch_suspend_disable_irqs();
}
}
return ret;
}