[pci] Add a mechanism for using a PCI VPD field as an NVS device
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
parent
69db6e7d8f
commit
ce7b0efa87
|
@ -0,0 +1,124 @@
|
||||||
|
/*
|
||||||
|
* Copyright (C) 2010 Michael Brown <mbrown@fensystems.co.uk>.
|
||||||
|
*
|
||||||
|
* This program is free software; you can redistribute it and/or
|
||||||
|
* modify it under the terms of the GNU General Public License as
|
||||||
|
* published by the Free Software Foundation; either version 2 of the
|
||||||
|
* License, or any later version.
|
||||||
|
*
|
||||||
|
* This program is distributed in the hope that it will be useful, but
|
||||||
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||||
|
* General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public License
|
||||||
|
* along with this program; if not, write to the Free Software
|
||||||
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||||
|
*/
|
||||||
|
|
||||||
|
FILE_LICENCE ( GPL2_OR_LATER );
|
||||||
|
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <ipxe/nvs.h>
|
||||||
|
#include <ipxe/pci.h>
|
||||||
|
#include <ipxe/pcivpd.h>
|
||||||
|
#include <ipxe/nvsvpd.h>
|
||||||
|
|
||||||
|
/** @file
|
||||||
|
*
|
||||||
|
* Non-Volatile Storage using Vital Product Data
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Read from VPD
|
||||||
|
*
|
||||||
|
* @v nvs NVS device
|
||||||
|
* @v address Starting address
|
||||||
|
* @v buf Data buffer
|
||||||
|
* @v len Length of data buffer
|
||||||
|
* @ret rc Return status code
|
||||||
|
*/
|
||||||
|
static int nvs_vpd_read ( struct nvs_device *nvs, unsigned int address,
|
||||||
|
void *data, size_t len ) {
|
||||||
|
struct nvs_vpd_device *nvsvpd =
|
||||||
|
container_of ( nvs, struct nvs_vpd_device, nvs );
|
||||||
|
int rc;
|
||||||
|
|
||||||
|
if ( ( rc = pci_vpd_read ( &nvsvpd->vpd, ( nvsvpd->address + address ),
|
||||||
|
data, len ) ) != 0 ) {
|
||||||
|
DBGC ( nvsvpd->vpd.pci, PCI_FMT " NVS could not read "
|
||||||
|
"[%04x,%04zx): %s\n", PCI_ARGS ( nvsvpd->vpd.pci ),
|
||||||
|
address, ( address + len ), strerror ( rc ) );
|
||||||
|
return rc;
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Write to VPD
|
||||||
|
*
|
||||||
|
* @v nvs NVS device
|
||||||
|
* @v address Starting address
|
||||||
|
* @v buf Data buffer
|
||||||
|
* @v len Length of data buffer
|
||||||
|
* @ret rc Return status code
|
||||||
|
*/
|
||||||
|
static int nvs_vpd_write ( struct nvs_device *nvs, unsigned int address,
|
||||||
|
const void *data, size_t len ) {
|
||||||
|
struct nvs_vpd_device *nvsvpd =
|
||||||
|
container_of ( nvs, struct nvs_vpd_device, nvs );
|
||||||
|
int rc;
|
||||||
|
|
||||||
|
if ( ( rc = pci_vpd_write ( &nvsvpd->vpd, ( nvsvpd->address + address ),
|
||||||
|
data, len ) ) != 0 ) {
|
||||||
|
DBGC ( nvsvpd->vpd.pci, PCI_FMT " NVS could not write "
|
||||||
|
"[%04x,%04zx): %s\n", PCI_ARGS ( nvsvpd->vpd.pci ),
|
||||||
|
address, ( address + len ), strerror ( rc ) );
|
||||||
|
return rc;
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Initialise NVS VPD device
|
||||||
|
*
|
||||||
|
* @v nvsvpd NVS VPD device
|
||||||
|
* @v pci PCI device
|
||||||
|
* @ret rc Return status code
|
||||||
|
*/
|
||||||
|
int nvs_vpd_init ( struct nvs_vpd_device *nvsvpd, struct pci_device *pci,
|
||||||
|
unsigned int field ) {
|
||||||
|
size_t len;
|
||||||
|
int rc;
|
||||||
|
|
||||||
|
/* Initialise VPD device */
|
||||||
|
if ( ( rc = pci_vpd_init ( &nvsvpd->vpd, pci ) ) != 0 ) {
|
||||||
|
DBGC ( pci, PCI_FMT " NVS could not initialise "
|
||||||
|
"VPD: %s\n", PCI_ARGS ( pci ), strerror ( rc ) );
|
||||||
|
return rc;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Locate VPD field */
|
||||||
|
if ( ( rc = pci_vpd_find ( &nvsvpd->vpd, field, &nvsvpd->address,
|
||||||
|
&len ) ) != 0 ) {
|
||||||
|
DBGC ( pci, PCI_FMT " NVS could not locate VPD field "
|
||||||
|
PCI_VPD_FIELD_FMT ": %s\n", PCI_ARGS ( pci ),
|
||||||
|
PCI_VPD_FIELD_ARGS ( field ), strerror ( rc ) );
|
||||||
|
return rc;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Initialise NVS device */
|
||||||
|
nvsvpd->nvs.block_size = 1;
|
||||||
|
nvsvpd->nvs.size = len;
|
||||||
|
nvsvpd->nvs.read = nvs_vpd_read;
|
||||||
|
nvsvpd->nvs.write = nvs_vpd_write;
|
||||||
|
|
||||||
|
DBGC ( pci, PCI_FMT " NVS using VPD field " PCI_VPD_FIELD_FMT " at "
|
||||||
|
"[%04x,%04x)\n", PCI_ARGS ( pci ), PCI_VPD_FIELD_ARGS ( field ),
|
||||||
|
nvsvpd->address, ( nvsvpd->address + nvsvpd->nvs.size ) );
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
|
@ -0,0 +1,33 @@
|
||||||
|
#ifndef _IPXE_NVSVPD_H
|
||||||
|
#define _IPXE_NVSVPD_H
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @file
|
||||||
|
*
|
||||||
|
* Non-Volatile Storage using Vital Product Data
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
FILE_LICENCE ( GPL2_OR_LATER );
|
||||||
|
|
||||||
|
#include <ipxe/nvs.h>
|
||||||
|
#include <ipxe/pcivpd.h>
|
||||||
|
|
||||||
|
/** An NVS VPD device */
|
||||||
|
struct nvs_vpd_device {
|
||||||
|
/** NVS device */
|
||||||
|
struct nvs_device nvs;
|
||||||
|
/** PCI VPD device */
|
||||||
|
struct pci_vpd vpd;
|
||||||
|
/** Starting address
|
||||||
|
*
|
||||||
|
* This address is added to the NVS address to form the VPD
|
||||||
|
* address.
|
||||||
|
*/
|
||||||
|
unsigned int address;
|
||||||
|
};
|
||||||
|
|
||||||
|
extern int nvs_vpd_init ( struct nvs_vpd_device *nvsvpd, struct pci_device *pci,
|
||||||
|
unsigned int field );
|
||||||
|
|
||||||
|
#endif /* IPXE_NVSVPD_H */
|
Reference in New Issue