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#include "libxl_osdeps.h" /* must come before any other headers */
#include "libxlu_internal.h"
#include "libxlu_disk_l.h"
#include "libxlu_disk_i.h"
#include "libxlu_cfg_i.h"
#define XLU__PCI_ERR(_c, _x, _a...) \
if((_c) && (_c)->report) fprintf((_c)->report, _x, ##_a)
static int hex_convert(const char *str, unsigned int *val, unsigned int mask)
{
unsigned long ret;
char *end;
ret = strtoul(str, &end, 16);
if ( end == str || *end != '\0' )
return -1;
if ( ret & ~mask )
return -1;
*val = (unsigned int)ret & mask;
return 0;
}
static int pcidev_struct_fill(libxl_device_pci *pcidev, unsigned int domain,
unsigned int bus, unsigned int dev,
unsigned int func, unsigned int vdevfn)
{
pcidev->domain = domain;
pcidev->bus = bus;
pcidev->dev = dev;
pcidev->func = func;
pcidev->vdevfn = vdevfn;
return 0;
}
#define STATE_DOMAIN 0
#define STATE_BUS 1
#define STATE_DEV 2
#define STATE_FUNC 3
#define STATE_VSLOT 4
#define STATE_OPTIONS_K 6
#define STATE_OPTIONS_V 7
#define STATE_TERMINAL 8
int xlu_pci_parse_bdf(XLU_Config *cfg, libxl_device_pci *pcidev, const char *str)
{
unsigned state = STATE_DOMAIN;
unsigned dom, bus, dev, func, vslot = 0;
char *buf2, *tok, *ptr, *end, *optkey = NULL;
if ( NULL == (buf2 = ptr = strdup(str)) )
return ERROR_NOMEM;
for(tok = ptr, end = ptr + strlen(ptr) + 1; ptr < end; ptr++) {
switch(state) {
case STATE_DOMAIN:
if ( *ptr == ':' ) {
state = STATE_BUS;
*ptr = '\0';
if ( hex_convert(tok, &dom, 0xffff) )
goto parse_error;
tok = ptr + 1;
}
break;
case STATE_BUS:
if ( *ptr == ':' ) {
state = STATE_DEV;
*ptr = '\0';
if ( hex_convert(tok, &bus, 0xff) )
goto parse_error;
tok = ptr + 1;
}else if ( *ptr == '.' ) {
state = STATE_FUNC;
*ptr = '\0';
if ( dom & ~0xff )
goto parse_error;
bus = dom;
dom = 0;
if ( hex_convert(tok, &dev, 0xff) )
goto parse_error;
tok = ptr + 1;
}
break;
case STATE_DEV:
if ( *ptr == '.' ) {
state = STATE_FUNC;
*ptr = '\0';
if ( hex_convert(tok, &dev, 0xff) )
goto parse_error;
tok = ptr + 1;
}
break;
case STATE_FUNC:
if ( *ptr == '\0' || *ptr == '@' || *ptr == ',' ) {
switch( *ptr ) {
case '\0':
state = STATE_TERMINAL;
break;
case '@':
state = STATE_VSLOT;
break;
case ',':
state = STATE_OPTIONS_K;
break;
}
*ptr = '\0';
if ( !strcmp(tok, "*") ) {
pcidev->vfunc_mask = LIBXL_PCI_FUNC_ALL;
}else{
if ( hex_convert(tok, &func, 0x7) )
goto parse_error;
pcidev->vfunc_mask = (1 << 0);
}
tok = ptr + 1;
}
break;
case STATE_VSLOT:
if ( *ptr == '\0' || *ptr == ',' ) {
state = ( *ptr == ',' ) ? STATE_OPTIONS_K : STATE_TERMINAL;
*ptr = '\0';
if ( hex_convert(tok, &vslot, 0xff) )
goto parse_error;
tok = ptr + 1;
}
break;
case STATE_OPTIONS_K:
if ( *ptr == '=' ) {
state = STATE_OPTIONS_V;
*ptr = '\0';
optkey = tok;
tok = ptr + 1;
}
break;
case STATE_OPTIONS_V:
if ( *ptr == ',' || *ptr == '\0' ) {
state = (*ptr == ',') ? STATE_OPTIONS_K : STATE_TERMINAL;
*ptr = '\0';
if ( !strcmp(optkey, "msitranslate") ) {
pcidev->msitranslate = atoi(tok);
}else if ( !strcmp(optkey, "power_mgmt") ) {
pcidev->power_mgmt = atoi(tok);
}else if ( !strcmp(optkey, "permissive") ) {
pcidev->permissive = atoi(tok);
}else{
XLU__PCI_ERR(cfg, "Unknown PCI BDF option: %s", optkey);
}
tok = ptr + 1;
}
default:
break;
}
}
free(buf2);
if ( tok != ptr || state != STATE_TERMINAL )
goto parse_error;
/* Just a pretty way to fill in the values */
pcidev_struct_fill(pcidev, dom, bus, dev, func, vslot << 3);
return 0;
parse_error:
return ERROR_INVAL;
}
/*
* Local variables:
* mode: C
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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