diff options
Diffstat (limited to 'drivers/acpi/processor_idle.c')
-rw-r--r-- | drivers/acpi/processor_idle.c | 129 |
1 files changed, 58 insertions, 71 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index 8a74bf3..e439eb7 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -3,7 +3,7 @@ * * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@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> * - Added processor hotplug support * Copyright (C) 2005 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> @@ -99,6 +99,9 @@ static int set_max_cstate(struct dmi_system_id *id) static struct dmi_system_id __cpuinitdata processor_power_dmi_table[] = { { set_max_cstate, "IBM ThinkPad R40e", { DMI_MATCH(DMI_BIOS_VENDOR,"IBM"), + DMI_MATCH(DMI_BIOS_VERSION,"1SET70WW")}, (void *)1}, + { set_max_cstate, "IBM ThinkPad R40e", { + DMI_MATCH(DMI_BIOS_VENDOR,"IBM"), DMI_MATCH(DMI_BIOS_VERSION,"1SET60WW")}, (void *)1}, { set_max_cstate, "IBM ThinkPad R40e", { DMI_MATCH(DMI_BIOS_VENDOR,"IBM"), @@ -261,21 +264,15 @@ static void acpi_processor_idle(void) u32 bm_status = 0; unsigned long diff = jiffies - pr->power.bm_check_timestamp; - if (diff > 32) - diff = 32; + if (diff > 31) + diff = 31; - while (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; - } + pr->power.bm_activity <<= diff; acpi_get_register(ACPI_BITREG_BUS_MASTER_STATUS, &bm_status, ACPI_MTX_DO_NOT_LOCK); if (bm_status) { - pr->power.bm_activity++; + pr->power.bm_activity |= 0x1; acpi_set_register(ACPI_BITREG_BUS_MASTER_STATUS, 1, ACPI_MTX_DO_NOT_LOCK); } @@ -287,16 +284,16 @@ static void acpi_processor_idle(void) else if (errata.piix4.bmisx) { if ((inb_p(errata.piix4.bmisx + 0x02) & 0x01) || (inb_p(errata.piix4.bmisx + 0x0A) & 0x01)) - pr->power.bm_activity++; + pr->power.bm_activity |= 0x1; } 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 * 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 * state (use it for this quantum only) istead of @@ -304,7 +301,8 @@ static void acpi_processor_idle(void) * qualification. This may, however, introduce DMA * 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(); next_state = cx->demotion.state; goto end; @@ -322,8 +320,6 @@ static void acpi_processor_idle(void) cx = &pr->power.states[ACPI_STATE_C1]; #endif - cx->usage++; - /* * Sleep: * ------ @@ -365,7 +361,9 @@ static void acpi_processor_idle(void) t1 = inl(acpi_fadt.xpm_tmr_blk.address); /* Invoke C2 */ inb(cx->address); - /* Dummy op - must do something useless after P_LVL2 read */ + /* Dummy wait op - must do something useless after P_LVL2 read + because chipsets cannot guarantee that STPCLK# signal + gets asserted in time to freeze execution properly. */ t2 = inl(acpi_fadt.xpm_tmr_blk.address); /* Get end time (ticks) */ t2 = inl(acpi_fadt.xpm_tmr_blk.address); @@ -403,7 +401,7 @@ static void acpi_processor_idle(void) t1 = inl(acpi_fadt.xpm_tmr_blk.address); /* Invoke C3 */ inb(cx->address); - /* Dummy op - must do something useless after P_LVL3 read */ + /* Dummy wait op (see above) */ t2 = inl(acpi_fadt.xpm_tmr_blk.address); /* Get end time (ticks) */ t2 = inl(acpi_fadt.xpm_tmr_blk.address); @@ -430,6 +428,9 @@ static void acpi_processor_idle(void) local_irq_enable(); return; } + cx->usage++; + if ((cx->type != ACPI_STATE_C1) && (sleep_ticks > 0)) + cx->time += sleep_ticks; next_state = pr->power.state; @@ -517,10 +518,9 @@ static int acpi_processor_set_power_policy(struct acpi_processor *pr) struct acpi_processor_cx *higher = NULL; struct acpi_processor_cx *cx; - ACPI_FUNCTION_TRACE("acpi_processor_set_power_policy"); if (!pr) - return_VALUE(-EINVAL); + return -EINVAL; /* * This function sets the default Cx state policy (OS idle handler). @@ -544,7 +544,7 @@ static int acpi_processor_set_power_policy(struct acpi_processor *pr) } if (!state_is_set) - return_VALUE(-ENODEV); + return -ENODEV; /* demotion */ for (i = 1; i < ACPI_PROCESSOR_MAX_POWER; i++) { @@ -583,18 +583,17 @@ static int acpi_processor_set_power_policy(struct acpi_processor *pr) higher = cx; } - return_VALUE(0); + return 0; } static int acpi_processor_get_power_info_fadt(struct acpi_processor *pr) { - ACPI_FUNCTION_TRACE("acpi_processor_get_power_info_fadt"); if (!pr) - return_VALUE(-EINVAL); + return -EINVAL; if (!pr->pblk) - return_VALUE(-ENODEV); + return -ENODEV; /* if info is obtained from pblk/fadt, type equals state */ pr->power.states[ACPI_STATE_C2].type = ACPI_STATE_C2; @@ -606,7 +605,7 @@ static int acpi_processor_get_power_info_fadt(struct acpi_processor *pr) * an SMP system. */ if ((num_online_cpus() > 1) && !acpi_fadt.plvl2_up) - return_VALUE(-ENODEV); + return -ENODEV; #endif /* determine C2 and C3 address from pblk */ @@ -622,12 +621,11 @@ static int acpi_processor_get_power_info_fadt(struct acpi_processor *pr) pr->power.states[ACPI_STATE_C2].address, pr->power.states[ACPI_STATE_C3].address)); - return_VALUE(0); + return 0; } static int acpi_processor_get_power_info_default_c1(struct acpi_processor *pr) { - ACPI_FUNCTION_TRACE("acpi_processor_get_power_info_default_c1"); /* Zero initialize all the C-states info. */ memset(pr->power.states, 0, sizeof(pr->power.states)); @@ -640,7 +638,7 @@ static int acpi_processor_get_power_info_default_c1(struct acpi_processor *pr) pr->power.states[ACPI_STATE_C0].valid = 1; pr->power.states[ACPI_STATE_C1].valid = 1; - return_VALUE(0); + return 0; } static int acpi_processor_get_power_info_cst(struct acpi_processor *pr) @@ -652,10 +650,9 @@ static int acpi_processor_get_power_info_cst(struct acpi_processor *pr) struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; union acpi_object *cst; - ACPI_FUNCTION_TRACE("acpi_processor_get_power_info_cst"); if (nocst) - return_VALUE(-ENODEV); + return -ENODEV; current_count = 1; @@ -667,15 +664,14 @@ static int acpi_processor_get_power_info_cst(struct acpi_processor *pr) status = acpi_evaluate_object(pr->handle, "_CST", NULL, &buffer); if (ACPI_FAILURE(status)) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No _CST, giving up\n")); - return_VALUE(-ENODEV); + return -ENODEV; } cst = (union acpi_object *)buffer.pointer; /* There must be at least 2 elements */ if (!cst || (cst->type != ACPI_TYPE_PACKAGE) || cst->package.count < 2) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "not enough elements in _CST\n")); + printk(KERN_ERR PREFIX "not enough elements in _CST\n"); status = -EFAULT; goto end; } @@ -684,8 +680,7 @@ static int acpi_processor_get_power_info_cst(struct acpi_processor *pr) /* Validate number of power states. */ if (count < 1 || count != cst->package.count - 1) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "count given by _CST is not valid\n")); + printk(KERN_ERR PREFIX "count given by _CST is not valid\n"); status = -EFAULT; goto end; } @@ -775,15 +770,14 @@ static int acpi_processor_get_power_info_cst(struct acpi_processor *pr) end: acpi_os_free(buffer.pointer); - return_VALUE(status); + return status; } static void acpi_processor_power_verify_c2(struct acpi_processor_cx *cx) { - ACPI_FUNCTION_TRACE("acpi_processor_get_power_verify_c2"); if (!cx->address) - return_VOID; + return; /* * C2 latency must be less than or equal to 100 @@ -792,7 +786,7 @@ static void acpi_processor_power_verify_c2(struct acpi_processor_cx *cx) else if (cx->latency > ACPI_PROCESSOR_MAX_C2_LATENCY) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "latency too large [%d]\n", cx->latency)); - return_VOID; + return; } /* @@ -802,7 +796,7 @@ static void acpi_processor_power_verify_c2(struct acpi_processor_cx *cx) cx->valid = 1; cx->latency_ticks = US_TO_PM_TIMER_TICKS(cx->latency); - return_VOID; + return; } static void acpi_processor_power_verify_c3(struct acpi_processor *pr, @@ -810,10 +804,9 @@ static void acpi_processor_power_verify_c3(struct acpi_processor *pr, { static int bm_check_flag; - ACPI_FUNCTION_TRACE("acpi_processor_get_power_verify_c3"); if (!cx->address) - return_VOID; + return; /* * C3 latency must be less than or equal to 1000 @@ -822,7 +815,7 @@ static void acpi_processor_power_verify_c3(struct acpi_processor *pr, else if (cx->latency > ACPI_PROCESSOR_MAX_C3_LATENCY) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "latency too large [%d]\n", cx->latency)); - return_VOID; + return; } /* @@ -835,7 +828,7 @@ static void acpi_processor_power_verify_c3(struct acpi_processor *pr, else if (errata.piix4.fdma) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "C3 not supported on PIIX4 with Type-F DMA\n")); - return_VOID; + return; } /* All the logic here assumes flags.bm_check is same across all CPUs */ @@ -852,7 +845,7 @@ static void acpi_processor_power_verify_c3(struct acpi_processor *pr, if (!pr->flags.bm_control) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "C3 support requires bus mastering control\n")); - return_VOID; + return; } } else { /* @@ -863,7 +856,7 @@ static void acpi_processor_power_verify_c3(struct acpi_processor *pr, ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Cache invalidation should work properly" " for C3 to be enabled on SMP systems\n")); - return_VOID; + return; } acpi_set_register(ACPI_BITREG_BUS_MASTER_RLD, 0, ACPI_MTX_DO_NOT_LOCK); @@ -878,7 +871,7 @@ static void acpi_processor_power_verify_c3(struct acpi_processor *pr, cx->valid = 1; cx->latency_ticks = US_TO_PM_TIMER_TICKS(cx->latency); - return_VOID; + return; } static int acpi_processor_power_verify(struct acpi_processor *pr) @@ -937,7 +930,6 @@ static int acpi_processor_get_power_info(struct acpi_processor *pr) unsigned int i; int result; - ACPI_FUNCTION_TRACE("acpi_processor_get_power_info"); /* NOTE: the idle thread may not be running while calling * this function */ @@ -960,7 +952,7 @@ static int acpi_processor_get_power_info(struct acpi_processor *pr) */ result = acpi_processor_set_power_policy(pr); if (result) - return_VALUE(result); + return result; /* * if one state of type C2 or C3 is available, mark this @@ -974,24 +966,23 @@ static int acpi_processor_get_power_info(struct acpi_processor *pr) } } - return_VALUE(0); + return 0; } int acpi_processor_cst_has_changed(struct acpi_processor *pr) { int result = 0; - ACPI_FUNCTION_TRACE("acpi_processor_cst_has_changed"); if (!pr) - return_VALUE(-EINVAL); + return -EINVAL; if (nocst) { - return_VALUE(-ENODEV); + return -ENODEV; } if (!pr->flags.power_setup_done) - return_VALUE(-ENODEV); + return -ENODEV; /* Fall back to the default idle loop */ pm_idle = pm_idle_save; @@ -1002,7 +993,7 @@ int acpi_processor_cst_has_changed(struct acpi_processor *pr) if ((pr->flags.power == 1) && (pr->flags.power_setup_done)) pm_idle = acpi_processor_idle; - return_VALUE(result); + return result; } /* proc interface */ @@ -1012,7 +1003,6 @@ static int acpi_processor_power_seq_show(struct seq_file *seq, void *offset) struct acpi_processor *pr = (struct acpi_processor *)seq->private; unsigned int i; - ACPI_FUNCTION_TRACE("acpi_processor_power_seq_show"); if (!pr) goto end; @@ -1064,13 +1054,14 @@ static int acpi_processor_power_seq_show(struct seq_file *seq, void *offset) else 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].usage); + pr->power.states[i].usage, + pr->power.states[i].time); } end: - return_VALUE(0); + return 0; } static int acpi_processor_power_open_fs(struct inode *inode, struct file *file) @@ -1094,7 +1085,6 @@ int acpi_processor_power_init(struct acpi_processor *pr, struct proc_dir_entry *entry = NULL; unsigned int i; - ACPI_FUNCTION_TRACE("acpi_processor_power_init"); if (!first_run) { dmi_check_system(processor_power_dmi_table); @@ -1106,14 +1096,14 @@ int acpi_processor_power_init(struct acpi_processor *pr, } if (!pr) - return_VALUE(-EINVAL); + return -EINVAL; if (acpi_fadt.cst_cnt && !nocst) { status = acpi_os_write_port(acpi_fadt.smi_cmd, acpi_fadt.cst_cnt, 8); if (ACPI_FAILURE(status)) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Notifying BIOS of _CST ability failed\n")); + ACPI_EXCEPTION((AE_INFO, status, + "Notifying BIOS of _CST ability failed")); } } @@ -1142,9 +1132,7 @@ int acpi_processor_power_init(struct acpi_processor *pr, entry = create_proc_entry(ACPI_PROCESSOR_FILE_POWER, S_IRUGO, acpi_device_dir(device)); if (!entry) - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Unable to create '%s' fs entry\n", - ACPI_PROCESSOR_FILE_POWER)); + return -EIO; else { entry->proc_fops = &acpi_processor_power_fops; entry->data = acpi_driver_data(device); @@ -1153,13 +1141,12 @@ int acpi_processor_power_init(struct acpi_processor *pr, pr->flags.power_setup_done = 1; - return_VALUE(0); + return 0; } int acpi_processor_power_exit(struct acpi_processor *pr, struct acpi_device *device) { - ACPI_FUNCTION_TRACE("acpi_processor_power_exit"); pr->flags.power_setup_done = 0; @@ -1179,5 +1166,5 @@ int acpi_processor_power_exit(struct acpi_processor *pr, cpu_idle_wait(); } - return_VALUE(0); + return 0; } |