Hi Pavel,
Thanks for the response.
Yes, for the solution we are trying to develop, we do not care about the resume. We just put system to S3 and rest is taken care by BIOS.
The bug was actually on 2.6.24. http://bugzilla.kernel.org/show_bug.cgi?id=9528
I am also attaching the code I have written to extract some ACPI variable information. Please have a look.
Mohd. Adil
Tata Consultancy Services
Mailto: mohd.adil@xxxxxxx
Website: http://www.tcs.com
____________________________________________
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Business Solutions
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____________________________________________
Pavel Machek <pavel@xxxxxxx>
01/27/2009 23:53 CET |
To |
mohd.adil@xxxxxxx |
cc |
majordomo@xxxxxxxxxxxxxxx, acpi-bugzilla-request@xxxxxxxxxxxxxxxxxxxxx, linux-pm-devel-request@xxxxxxxxxxxxxxxxxxxxx, linux-pm@xxxxxxxxxxxxxx | |
bcc |
||
Subject |
Re: [linux-pm] ACPI problems | |
On Wed 2009-01-21 15:22:20, mohd.adil@xxxxxxx wrote:
> Hi
>
> This is my first post to the list. Hope I will find a
> solution.
Please avoid using html on the lists.
> I am trying to develop a new functionality using a Sun
> alonso Quad Core blade (x86_64) architecture.
>
> The linux distribution which I am using contains a very
> old acpi driver (02/09/2005 probably acpi version 1 compliant)
>
> Further, the BIOS I am using is an AMI BIOS. I am fairly
> certain that it is acpi version 3 compliant.
Famous last words.
> Now, I am facing two problems here.
>
> 1) I am trying to evaluate some namespace control methods
> which are setup in sytem DSDT.
>
> Functions are :
>
> [1]\\_SB.PERB (should contain memory location
> address) and
>
> [2]\\_SB.PERL (should contain length)
>
> This some information passed to us from BIOS which is
> required for my development.
>
> I am using acpi_evaluate_object to evaluate these
> functions. I dont see any error in executing the evaluate
>
> function call. But they evaluate to zero.
Hmm, this is hard to debug without seeing the source.
> 2) The second task I have is to put the system into S3
> (suspend to ram) state.
>
> While doing that I am experiencing a problem. Every
> time I write
>
> echo mem > /sys/power/state
>
> System hangs at METHOD_NAME__PTS method. There is a
> related bug in
>
> new acpi driver related to this function. But since I
> am using a very old driver this should not have
> happened.
Which kernel version?
> Just for added information : I dont really care about
> resume from the S3 state. I dont have video card.
You want to suspend but don't care about resume...?!
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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/* A simple linux kernel module */
/* Include the required headers */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/acpi.h>
#include <linux/slab.h>
#include <asm/uaccess.h>
#include <asm/rtc.h>
void do_acpi_stuff( void );
void print_acpi_buffer (acpi_string);
void print_acpi_int (acpi_string);
void print_acpi_string (acpi_string);
void print_acpi_int2 (acpi_string);
void print_acpi_integer (acpi_string);
void print_acpi_string2 (acpi_string);
void setup_pmem_reboot (void);
void unsetup_pmem_reboot (void);
void show_cmos (void);
void cmos_setsize(void);
MODULE_PARM_DESC(choice, "A short integer");
MODULE_PARM_DESC(data, "Unsigned Long");
static short choice = 0;
static long data = 0;
module_param(choice , short, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
module_param(data , long, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
/* The module initialisation function */
int init_module(void)
{
printk(KERN_EMERG "Simple module inserted. Choice = %d, Data = %X \n", choice, data);
/* extracting acpi namespace information */
switch ( choice ) {
case 1 : show_cmos();
break ;
case 2 : setup_pmem_reboot();
break ;
case 3 : unsetup_pmem_reboot();
break ;
case 4 : cmos_setsize();
break ;
case 5 : do_acpi_stuff();
break ;
default : printk(KERN_EMERG "Invalid choice" );
break;
}
return 0;
}
/* The module cleanup function */
void cleanup_module()
{
printk(KERN_EMERG "Removing simple module.\n");
}
void setup_pmem_reboot (void)
{
int temp = 0;
outb ( 0xDD, 0x72);
temp = inb ( 0x73 );
printk(KERN_EMERG "Pmem_reboot = %d ", temp );
temp = temp | 0x10 ;
printk(KERN_EMERG "Pmem_reboot = %d ", temp );
outb (0xDD, 0x72);
outb (temp , 0x73 );
}
void show_cmos (void)
{
unsigned int temp = 0;
outb ( 0xDD, 0x72);
temp = inb ( 0x73 );
printk(KERN_EMERG "Pmem_reboot = %d ", temp );
outb ( 0xCB, 0x72);
temp = inb ( 0x73 );
printk(KERN_EMERG "Size = %d ", temp );
}
void unsetup_pmem_reboot (void)
{
unsigned int temp = 0;
outb ( 0xDD, 0x72);
temp = inb ( 0x73 );
printk(KERN_EMERG "Pmem_reboot = %d ", temp );
temp = temp & 0xEF ;
outb (0xDD, 0x72);
outb (temp , 0x73 );
printk(KERN_EMERG "Pmem_reboot = %d ", temp );
}
void cmos_setsize(void)
{
unsigned int temp = 0;
outb ( 0xCB, 0x72);
temp = inb ( 0x73 );
printk(KERN_EMERG "Size = %d ", temp );
outb ( 0xCB, 0x72);
outb ( data, 0x73);
printk(KERN_EMERG "Size = %d ", temp );
}
void do_acpi_stuff( void )
{
print_acpi_buffer ("\\_SB.PERB");
print_acpi_integer ("\\_SB.PERL");
}
void print_acpi_integer (acpi_string astr) {
acpi_handle s_b = (acpi_handle)0 ;
acpi_status status ;
unsigned long dat = 0;
status = acpi_get_handle ( 0, astr, &s_b );
if (status == AE_OK)
{
printk(KERN_EMERG " get_handle success %d, %x : ", status, s_b);
status = acpi_evaluate_integer ( s_b, astr, NULL, &dat);
if (status == AE_OK)
printk(KERN_EMERG " Integer Value = %d " , dat ) ;
else
printk(KERN_EMERG " Error evaluation %d " , status);
}
else
printk(KERN_EMERG " get_handle error %d : ", status );
}
void print_acpi_buffer (acpi_string astr)
{
acpi_handle s_b = (acpi_handle)0 ;
acpi_status status ;
struct acpi_buffer rels = { 0, NULL };
union acpi_object *out_objs;
u8 *cp ;
int i;
out_objs = kmalloc (sizeof(union acpi_object), GFP_KERNEL);
if ( !out_objs)
{
printk(KERN_EMERG " Could Not allocate memory rels pointer , buffer ");
return;
}
status = acpi_get_handle ( 0, astr, &s_b );
if (status == AE_OK)
{
printk(KERN_EMERG " get_handle success %d, %x : ", status, s_b);
memset(out_objs, 0, sizeof(union acpi_object));
rels.length = 2 * (sizeof(union acpi_object));
rels.pointer = out_objs;
status = acpi_evaluate_object(s_b, NULL , NULL, &rels);
if (status == AE_OK)
{
printk(KERN_EMERG " eval_object buffer success.result: %d, %d ", out_objs->type, rels.length );
cp = (u8 *)(out_objs->buffer.pointer) ;
for (i = 0; i< out_objs->buffer.length ; i++) {
printk(KERN_EMERG " %X", cp[i]);
}
}
else
{
printk(KERN_EMERG " error %d : ", status);
printk(KERN_EMERG " result buffer : %d " , (int)rels.length);
}
}
else
printk(KERN_EMERG " get_handle error %d : ", status );
kfree (out_objs);
}
void print_acpi_int (acpi_string astr)
{
acpi_handle *s_b;
acpi_status status ;
struct acpi_buffer *rels;
union acpi_object *out_objs;
s_b = kmalloc ( sizeof (acpi_handle), GFP_KERNEL);
if (!s_b)
{
printk(KERN_EMERG " Could Not allocate memory s_b , int ");
return;
}
rels = kmalloc ( sizeof (struct acpi_buffer) , GFP_KERNEL);
if ( !rels)
{
printk(KERN_EMERG " Could Not allocate memory rels , int");
return;
}
rels->pointer = kmalloc ( sizeof(union acpi_object), GFP_KERNEL);
if ( !rels->pointer)
{
printk(KERN_EMERG " Could Not allocate memory rels pointer , int");
return;
}
status = acpi_get_handle ( 0, astr, &s_b );
if (status == AE_OK)
{
printk(KERN_EMERG "get_handle success %d, %d : ", status, *s_b);
rels->length = sizeof(union acpi_object);
status = acpi_evaluate_object(*s_b, 0, 0, rels);
out_objs = (union acpi_object *) rels->pointer;
if (status == AE_OK)
{
printk(KERN_EMERG " eval_object int success. result : %d, %d, ", out_objs->type, rels->length );
printk(KERN_EMERG "Int value = %d", out_objs->integer.value );
}
else
{
printk(KERN_EMERG " error %d : ", status);
}
}
else
printk(KERN_EMERG " get_handle error %d : ", status);
kfree (rels->pointer);
kfree (rels);
kfree (s_b);
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