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boot: Build ata and scsi paths in function 

Introduce build_scsi_path() and build_ata_path().
We will reuse these functions in the next commit.

Reviewed-by: Karl Heubaum <karl.heubaum@oracle.com>
Reviewed-by: Arbel Moshe <arbel.moshe@oracle.com>
Signed-off-by: Sam Eiderman <shmuel.eiderman@oracle.com>
Message-Id: <20190626123816.8907-4-shmuel.eiderman@oracle.com>
This commit is contained in:
Sam Eiderman 2019-06-26 15:38:14 +03:00 committed by Gerd Hoffmann
parent 9383ba748b
commit db58caa92e
1 changed files with 28 additions and 8 deletions
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36
src/boot.c
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@ -71,6 +71,30 @@ build_pci_path(char *buf, int max, const char *devname, struct pci_device *pci)
return p;
}
static char *
build_scsi_path(char *buf, int max,
struct pci_device *pci, int target, int lun)
{
// Build the string path of a scsi drive - for example:
// /pci@i0cf8/scsi@5/channel@0/disk@1,0
char *p;
p = build_pci_path(buf, max, "*", pci);
p += snprintf(p, buf+max-p, "/*@0/*@%x,%x", target, lun);
return p;
}
static char *
build_ata_path(char *buf, int max,
struct pci_device *pci, int chanid, int slave)
{
// Build the string path of an ata drive - for example:
// /pci@i0cf8/ide@1,1/drive@1/disk@0
char *p;
p = build_pci_path(buf, max, "*", pci);
p += snprintf(p, buf+max-p, "/drive@%x/disk@%x", chanid, slave);
return p;
}
/****************************************************************
* Boot device logical geometry
@ -221,10 +245,8 @@ int bootprio_find_scsi_device(struct pci_device *pci, int target, int lun)
if (!pci)
// support only pci machine for now
return -1;
// Find scsi drive - for example: /pci@i0cf8/scsi@5/channel@0/disk@1,0
char desc[256], *p;
p = build_pci_path(desc, sizeof(desc), "*", pci);
snprintf(p, desc+sizeof(desc)-p, "/*@0/*@%x,%x", target, lun);
char desc[256];
build_scsi_path(desc, sizeof(desc), pci, target, lun);
return find_prio(desc);
}
@ -237,10 +259,8 @@ int bootprio_find_ata_device(struct pci_device *pci, int chanid, int slave)
if (!pci)
// support only pci machine for now
return -1;
// Find ata drive - for example: /pci@i0cf8/ide@1,1/drive@1/disk@0
char desc[256], *p;
p = build_pci_path(desc, sizeof(desc), "*", pci);
snprintf(p, desc+sizeof(desc)-p, "/drive@%x/disk@%x", chanid, slave);
char desc[256];
build_ata_path(desc, sizeof(desc), pci, chanid, slave);
return find_prio(desc);
}