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Pull c-states into release branch

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This commit is contained in:
Len Brown 2006-06-29 15:58:09 -04:00
commit f1b2ad5d2a
2 changed files with 17 additions and 19 deletions
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35
drivers/acpi/processor_idle.c
View File

@ -3,7 +3,7 @@
* *
* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
* Copyright (C) 2004 Dominik Brodowski <linux@brodo.de> * Copyright (C) 2004, 2005 Dominik Brodowski <linux@brodo.de>
* Copyright (C) 2004 Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> * Copyright (C) 2004 Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
* - Added processor hotplug support * - Added processor hotplug support
* Copyright (C) 2005 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> * Copyright (C) 2005 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
@ -264,21 +264,15 @@ static void acpi_processor_idle(void)
u32 bm_status = 0; u32 bm_status = 0;
unsigned long diff = jiffies - pr->power.bm_check_timestamp; unsigned long diff = jiffies - pr->power.bm_check_timestamp;
if (diff > 32) if (diff > 31)
diff = 32; diff = 31;
while (diff) { pr->power.bm_activity <<= diff;
/* if we didn't get called, assume there was busmaster activity */
diff--;
if (diff)
pr->power.bm_activity |= 0x1;
pr->power.bm_activity <<= 1;
}
acpi_get_register(ACPI_BITREG_BUS_MASTER_STATUS, acpi_get_register(ACPI_BITREG_BUS_MASTER_STATUS,
&bm_status, ACPI_MTX_DO_NOT_LOCK); &bm_status, ACPI_MTX_DO_NOT_LOCK);
if (bm_status) { if (bm_status) {
pr->power.bm_activity++; pr->power.bm_activity |= 0x1;
acpi_set_register(ACPI_BITREG_BUS_MASTER_STATUS, acpi_set_register(ACPI_BITREG_BUS_MASTER_STATUS,
1, ACPI_MTX_DO_NOT_LOCK); 1, ACPI_MTX_DO_NOT_LOCK);
} }
@ -290,16 +284,16 @@ static void acpi_processor_idle(void)
else if (errata.piix4.bmisx) { else if (errata.piix4.bmisx) {
if ((inb_p(errata.piix4.bmisx + 0x02) & 0x01) if ((inb_p(errata.piix4.bmisx + 0x02) & 0x01)
|| (inb_p(errata.piix4.bmisx + 0x0A) & 0x01)) || (inb_p(errata.piix4.bmisx + 0x0A) & 0x01))
pr->power.bm_activity++; pr->power.bm_activity |= 0x1;
} }
pr->power.bm_check_timestamp = jiffies; pr->power.bm_check_timestamp = jiffies;
/* /*
* Apply bus mastering demotion policy. Automatically demote * If bus mastering is or was active this jiffy, demote
* to avoid a faulty transition. Note that the processor * to avoid a faulty transition. Note that the processor
* won't enter a low-power state during this call (to this * won't enter a low-power state during this call (to this
* funciton) but should upon the next. * function) but should upon the next.
* *
* TBD: A better policy might be to fallback to the demotion * TBD: A better policy might be to fallback to the demotion
* state (use it for this quantum only) istead of * state (use it for this quantum only) istead of
@ -307,7 +301,8 @@ static void acpi_processor_idle(void)
* qualification. This may, however, introduce DMA * qualification. This may, however, introduce DMA
* issues (e.g. floppy DMA transfer overrun/underrun). * issues (e.g. floppy DMA transfer overrun/underrun).
*/ */
if (pr->power.bm_activity & cx->demotion.threshold.bm) { if ((pr->power.bm_activity & 0x1) &&
cx->demotion.threshold.bm) {
local_irq_enable(); local_irq_enable();
next_state = cx->demotion.state; next_state = cx->demotion.state;
goto end; goto end;
@ -325,8 +320,6 @@ static void acpi_processor_idle(void)
cx = &pr->power.states[ACPI_STATE_C1]; cx = &pr->power.states[ACPI_STATE_C1];
#endif #endif
cx->usage++;
/* /*
* Sleep: * Sleep:
* ------ * ------
@ -435,6 +428,9 @@ static void acpi_processor_idle(void)
local_irq_enable(); local_irq_enable();
return; return;
} }
cx->usage++;
if ((cx->type != ACPI_STATE_C1) && (sleep_ticks > 0))
cx->time += sleep_ticks;
next_state = pr->power.state; next_state = pr->power.state;
@ -1058,9 +1054,10 @@ static int acpi_processor_power_seq_show(struct seq_file *seq, void *offset)
else else
seq_puts(seq, "demotion[--] "); seq_puts(seq, "demotion[--] ");
seq_printf(seq, "latency[%03d] usage[%08d]\n", seq_printf(seq, "latency[%03d] usage[%08d] duration[%020llu]\n",
pr->power.states[i].latency, pr->power.states[i].latency,
pr->power.states[i].usage); pr->power.states[i].usage,
pr->power.states[i].time);
} }
end: end:

1
include/acpi/processor.h
View File

@ -62,6 +62,7 @@ struct acpi_processor_cx {
u32 latency_ticks; u32 latency_ticks;
u32 power; u32 power;
u32 usage; u32 usage;
u64 time;
struct acpi_processor_cx_policy promotion; struct acpi_processor_cx_policy promotion;
struct acpi_processor_cx_policy demotion; struct acpi_processor_cx_policy demotion;
}; };