62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
/*
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pci_dev_name.c
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*/
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#include "pci.h"
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#include "syslib.h"
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#include <minix/sysutil.h>
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/*===========================================================================*
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* pci_dev_name *
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*===========================================================================*/
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PUBLIC char *pci_dev_name(vid, did)
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u16_t vid;
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u16_t did;
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{
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static char name[PCIINFO_ENTRY_SIZE]; /* We need a better interface for this */
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int r;
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cp_grant_id_t gid;
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message m;
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gid= cpf_grant_direct(pci_procnr, (vir_bytes)name, sizeof(name),
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CPF_WRITE);
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if (gid == -1)
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{
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printf("pci_dev_name: cpf_grant_direct failed: %d\n",
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errno);
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return NULL;
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}
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m.m_type= BUSC_PCI_DEV_NAME_S;
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m.m7_i1= vid;
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m.m7_i2= did;
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m.m7_i3= sizeof(name);
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m.m7_i4= gid;
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r= sendrec(pci_procnr, &m);
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cpf_revoke(gid);
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if (r != 0)
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panic("syslib/" __FILE__, "pci_dev_name: can't talk to PCI", r);
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if (m.m_type == ENOENT)
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{
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#if DEBUG
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printf("pci_dev_name: got no name\n");
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#endif
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return NULL; /* No name for this device */
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}
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if (m.m_type != 0)
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panic("syslib/" __FILE__, "pci_dev_name: got bad reply from PCI", m.m_type);
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name[sizeof(name)-1]= '\0'; /* Make sure that the string is NUL
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* terminated.
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*/
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#if DEBUG
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printf("pci_dev_name: got name %s\n", name);
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#endif
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return name;
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}
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