mirror of
https://github.com/xcat2/xNBA.git
synced 2024-12-15 07:41:45 +00:00
Separated out UNDI ROM location code into undirom.c, and use struct
undi_rom rather than struct pxe_driver. (This is part of the naming consistency fixes).
This commit is contained in:
Michael Brown
parent
675fe200e5
commit
6fc75f659b
236
src/arch/i386/drivers/net/undirom.c
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236
src/arch/i386/drivers/net/undirom.c
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/*
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* Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <pxe.h>
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#include <realmode.h>
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#include <bios.h>
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#include <pnpbios.h>
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#include <gpxe/pci.h>
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#include <undirom.h>
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/** @file
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*
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* UNDI expansion ROMs
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*
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*/
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/** List of all UNDI ROMs */
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static LIST_HEAD ( undiroms );
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/**
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* Parse PXE ROM ID structure
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*
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* @v undirom UNDI ROM
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* @v pxeromid Offset within ROM to PXE ROM ID structure
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* @ret rc Return status code
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*/
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static int undirom_parse_pxeromid ( struct undi_rom *undirom,
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unsigned int pxeromid ) {
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struct undi_rom_id undi_rom_id;
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unsigned int undiloader;
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DBGC ( undirom, "UNDIROM %p has PXE ROM ID at %04x:%04x\n", undirom,
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undirom->rom_segment, pxeromid );
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/* Read PXE ROM ID structure and verify */
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copy_from_real ( &undi_rom_id, undirom->rom_segment, pxeromid,
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sizeof ( undi_rom_id ) );
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if ( undi_rom_id.Signature != UNDI_ROM_ID_SIGNATURE ) {
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DBGC ( undirom, "UNDIROM %p has bad PXE ROM ID signature "
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"%08lx\n", undirom, undi_rom_id.Signature );
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return -EINVAL;
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}
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/* Check for UNDI loader */
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undiloader = undi_rom_id.UNDILoader;
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if ( ! undiloader ) {
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DBGC ( undirom, "UNDIROM %p has no UNDI loader\n", undirom );
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return -EINVAL;
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}
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/* Fill in UNDI ROM loader fields */
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undirom->loader_entry.segment = undirom->rom_segment;
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undirom->loader_entry.offset = undiloader;
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undirom->code_size = undi_rom_id.CodeSize;
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undirom->data_size = undi_rom_id.DataSize;
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DBGC ( undirom, "UNDIROM %p has UNDI loader at %04x:%04x "
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"(code %04x data %04x)\n", undirom,
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undirom->loader_entry.segment, undirom->loader_entry.offset,
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undirom->code_size, undirom->data_size );
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return 0;
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}
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/**
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* Parse PCI expansion header
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*
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* @v undirom UNDI ROM
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* @v pcirheader Offset within ROM to PCI expansion header
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*/
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static int undirom_parse_pcirheader ( struct undi_rom *undirom,
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unsigned int pcirheader ) {
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struct pcir_header pcir_header;
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DBGC ( undirom, "UNDIROM %p has PCI expansion header at %04x:%04x\n",
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undirom, undirom->rom_segment, pcirheader );
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/* Read PCI expansion header and verify */
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copy_from_real ( &pcir_header, undirom->rom_segment, pcirheader,
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sizeof ( pcir_header ) );
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if ( pcir_header.signature != PCIR_SIGNATURE ) {
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DBGC ( undirom, "UNDIROM %p has bad PCI expansion header "
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"signature %08lx\n", undirom, pcir_header.signature );
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return -EINVAL;
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}
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/* Fill in UNDI ROM PCI device fields */
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undirom->bus_type = PCI_NIC;
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undirom->bus_id.pci.vendor_id = pcir_header.vendor_id;
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undirom->bus_id.pci.device_id = pcir_header.device_id;
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DBGC ( undirom, "UNDIROM %p is for PCI devices %04x:%04x\n", undirom,
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undirom->bus_id.pci.vendor_id, undirom->bus_id.pci.device_id );
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return 0;
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}
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/**
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* Probe UNDI ROM
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*
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* @v rom_segment ROM segment address
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* @ret rc Return status code
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*/
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static int undirom_probe ( unsigned int rom_segment ) {
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struct undi_rom *undirom = NULL;
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struct undi_rom_header romheader;
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size_t rom_len;
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unsigned int pxeromid;
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unsigned int pcirheader;
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int rc;
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/* Read expansion ROM header and verify */
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copy_from_real ( &romheader, rom_segment, 0, sizeof ( romheader ) );
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if ( romheader.Signature != ROM_SIGNATURE ) {
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rc = -EINVAL;
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goto err;
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}
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rom_len = ( romheader.ROMLength * 512 );
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/* Allocate memory for UNDI ROM */
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undirom = malloc ( sizeof ( *undirom ) );
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if ( ! undirom ) {
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DBG ( "Could not allocate UNDI ROM structure\n" );
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rc = -ENOMEM;
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goto err;
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}
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memset ( undirom, 0, sizeof ( *undirom ) );
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DBGC ( undirom, "UNDIROM %p trying expansion ROM at %04x:0000 "
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"(%zdkB)\n", undirom, rom_segment, ( rom_len / 1024 ) );
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undirom->rom_segment = rom_segment;
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/* Check for and parse PXE ROM ID */
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pxeromid = romheader.PXEROMID;
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if ( ! pxeromid ) {
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DBGC ( undirom, "UNDIROM %p has no PXE ROM ID\n", undirom );
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rc = -EINVAL;
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goto err;
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}
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if ( pxeromid > rom_len ) {
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DBGC ( undirom, "UNDIROM %p PXE ROM ID outside ROM\n",
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undirom );
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rc = -EINVAL;
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goto err;
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}
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if ( ( rc = undirom_parse_pxeromid ( undirom, pxeromid ) ) != 0 )
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goto err;
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/* Parse PCIR header, if present */
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pcirheader = romheader.PCIRHeader;
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if ( pcirheader )
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undirom_parse_pcirheader ( undirom, pcirheader );
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/* Add to UNDI ROM list and return */
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DBGC ( undirom, "UNDIROM %p registered\n", undirom );
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list_add ( &undirom->list, &undiroms );
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return 0;
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err:
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free ( undirom );
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return rc;
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}
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/**
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* Create UNDI ROMs for all possible expansion ROMs
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*
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* @ret
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*/
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static void undirom_probe_all_roms ( void ) {
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static int probed = 0;
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unsigned int rom_segment;
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/* Perform probe only once */
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if ( probed )
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return;
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DBG ( "Scanning for PXE expansion ROMs\n" );
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/* Scan through expansion ROM region at 2kB intervals */
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for ( rom_segment = 0xc000 ; rom_segment < 0x10000 ;
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rom_segment += 0x80 ) {
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undirom_probe ( rom_segment );
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}
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probed = 1;
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}
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/**
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* Find UNDI ROM for PCI device
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*
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* @v vendor_id PCI vendor ID
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* @v device_id PCI device ID
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* @v rombase ROM base address, or 0 for any
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* @ret undirom UNDI ROM, or NULL
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*/
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struct undi_rom * undirom_find_pci ( unsigned int vendor_id,
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unsigned int device_id,
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unsigned int rombase ) {
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struct undi_rom *undirom;
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undirom_probe_all_roms();
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list_for_each_entry ( undirom, &undiroms, list ) {
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if ( undirom->bus_type != PCI_NIC )
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continue;
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if ( undirom->bus_id.pci.vendor_id != vendor_id )
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continue;
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if ( undirom->bus_id.pci.device_id != device_id )
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continue;
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if ( rombase && ( ( undirom->rom_segment << 4 ) != rombase ) )
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continue;
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DBGC ( undirom, "UNDIROM %p matched PCI %04x:%04x (%08x)\n",
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undirom, vendor_id, device_id, rombase );
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return undirom;
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}
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DBG ( "No UNDI ROM matched PCI %04x:%04x (%08x)\n",
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vendor_id, device_id, rombase );
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return NULL;
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}
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49
src/arch/i386/include/undirom.h
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49
src/arch/i386/include/undirom.h
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@ -0,0 +1,49 @@
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#ifndef _UNDIROM_H
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#define _UNDIROM_H
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/** @file
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*
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* UNDI expansion ROMs
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*
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*/
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/** An UNDI PCI device ID */
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struct undi_pci_device_id {
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/** PCI vendor ID */
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unsigned int vendor_id;
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/** PCI device ID */
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unsigned int device_id;
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};
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/** An UNDI device ID */
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union undi_device_id {
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/** PCI device ID */
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struct undi_pci_device_id pci;
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};
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/** An UNDI ROM */
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struct undi_rom {
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/** List of UNDI ROMs */
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struct list_head list;
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/** ROM segment address */
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unsigned int rom_segment;
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/** UNDI loader entry point */
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SEGOFF16_t loader_entry;
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/** Code segment size */
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size_t code_size;
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/** Data segment size */
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size_t data_size;
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/** Bus type
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*
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* Values are as used by @c PXENV_UNDI_GET_NIC_TYPE
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*/
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unsigned int bus_type;
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/** Device ID */
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union undi_device_id bus_id;
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};
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extern struct undi_rom * undirom_find_pci ( unsigned int vendor_id,
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unsigned int device_id,
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unsigned int rombase );
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#endif /* _UNDIROM_H */
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