minix/lib/libsys/pci_find_dev.c

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/*
pci_find_dev.c
*/
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#include "pci.h"
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#include "syslib.h"
#include <minix/sysutil.h>
/*===========================================================================*
* pci_find_dev *
*===========================================================================*/
PUBLIC int pci_find_dev(u8_t bus, u8_t dev, u8_t func, int *devindp)
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{
int r;
message m;
m.m_type= BUSC_PCI_FIND_DEV;
m.m1_i1= bus;
m.m1_i2= dev;
m.m1_i3= func;
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r= sendrec(pci_procnr, &m);
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if (r != 0)
panic("pci_find_dev: can't talk to PCI: %d", r);
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if (m.m_type == 1)
{
*devindp= m.m1_i1;
printf("pci_find_dev: got device %d for %d.%d.%d\n",
*devindp, bus, dev, func);
return 1;
}
if (m.m_type != 0)
panic("pci_find_dev: got bad reply from PCI: %d", m.m_type);
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printf("pci_find_dev: got nothing\n");
return 0;
}