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[settings] Add "busdevfn" setting type

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Allow network device's "busloc" setting to be formatted as a PCI
bus:dev.fn address using e.g. ${net0/busloc:busdevfn}.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown 2013-07-12 22:28:00 +02:00
parent c0cff94320
commit 3dbcce51ea
3 changed files with 58 additions and 0 deletions
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47
src/core/settings.c
View File

@ -33,6 +33,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
#include <ipxe/uuid.h>
#include <ipxe/uri.h>
#include <ipxe/base16.h>
#include <ipxe/pci.h>
#include <ipxe/init.h>
#include <ipxe/settings.h>
@ -1857,6 +1858,52 @@ struct setting_type setting_type_uuid __setting_type = {
.format = format_uuid_setting,
};
/**
* Parse PCI bus:dev.fn setting value
*
* @v value Formatted setting value
* @v buf Buffer to contain raw value
* @v len Length of buffer
* @ret len Length of raw value, or negative error
*/
static int parse_busdevfn_setting ( const char *value __unused,
void *buf __unused, size_t len __unused ) {
return -ENOTSUP;
}
/**
* Format PCI bus:dev.fn setting value
*
* @v raw Raw setting value
* @v raw_len Length of raw setting value
* @v buf Buffer to contain formatted value
* @v len Length of buffer
* @ret len Length of formatted value, or negative error
*/
static int format_busdevfn_setting ( const void *raw, size_t raw_len, char *buf,
size_t len ) {
signed long dummy;
unsigned long busdevfn;
int check_len;
/* Extract numeric value */
check_len = numeric_setting_value ( raw, raw_len, &dummy, &busdevfn );
if ( check_len < 0 )
return check_len;
assert ( check_len == ( int ) raw_len );
/* Format value */
return snprintf ( buf, len, "%02lx:%02lx.%lx", PCI_BUS ( busdevfn ),
PCI_SLOT ( busdevfn ), PCI_FUNC ( busdevfn ) );
}
/** PCI bus:dev.fn setting type */
struct setting_type setting_type_busdevfn __setting_type = {
.name = "busdevfn",
.parse = parse_busdevfn_setting,
.format = format_busdevfn_setting,
};
/******************************************************************************
*
* Setting expansion

1
src/include/ipxe/settings.h
View File

@ -324,6 +324,7 @@ extern struct setting_type setting_type_hex __setting_type;
extern struct setting_type setting_type_hexhyp __setting_type;
extern struct setting_type setting_type_hexraw __setting_type;
extern struct setting_type setting_type_uuid __setting_type;
extern struct setting_type setting_type_busdevfn __setting_type;
extern struct setting ip_setting __setting ( SETTING_IPv4 );
extern struct setting netmask_setting __setting ( SETTING_IPv4 );

10
src/tests/settings_test.c
View File

@ -182,6 +182,12 @@ static struct setting test_uuid_setting = {
.type = &setting_type_uuid,
};
/** Test PCI bus:dev.fn setting type */
static struct setting test_busdevfn_setting = {
.name = "test_busdevfn",
.type = &setting_type_busdevfn,
};
/**
* Perform settings self-tests
*
@ -282,6 +288,10 @@ static void settings_test_exec ( void ) {
0x7a, 0x7c, 0xfe, 0x4f, 0xca, 0x4a, 0x57 ),
"1a6a749d-0eda-461a-a87a-7cfe4fca4a57" );
/* "busdevfn" setting type (no store capability) */
fetchf_ok ( &test_settings, &test_busdevfn_setting,
RAW ( 0x03, 0x45 ), "03:08.5" );
/* Clear and unregister test settings block */
clear_settings ( &test_settings );
unregister_settings ( &test_settings );