--- /dev/null
+/*
+ * Copyright (C) 2007 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pxe.h>
+#include <realmode.h>
+#include <undirom.h>
+
+/** @file
+ *
+ * UNDI expansion ROMs
+ *
+ */
+
+/** List of all UNDI ROMs */
+static LIST_HEAD ( undiroms );
+
+/**
+ * Parse PXE ROM ID structure
+ *
+ * @v undirom UNDI ROM
+ * @v pxeromid Offset within ROM to PXE ROM ID structure
+ * @ret rc Return status code
+ */
+static int undirom_parse_pxeromid ( struct undi_rom *undirom,
+ unsigned int pxeromid ) {
+ struct undi_rom_id undi_rom_id;
+ unsigned int undiloader;
+
+ DBGC ( undirom, "UNDIROM %p has PXE ROM ID at %04x:%04x\n", undirom,
+ undirom->rom_segment, pxeromid );
+
+ /* Read PXE ROM ID structure and verify */
+ copy_from_real ( &undi_rom_id, undirom->rom_segment, pxeromid,
+ sizeof ( undi_rom_id ) );
+ if ( undi_rom_id.Signature != UNDI_ROM_ID_SIGNATURE ) {
+ DBGC ( undirom, "UNDIROM %p has bad PXE ROM ID signature "
+ "%08x\n", undirom, undi_rom_id.Signature );
+ return -EINVAL;
+ }
+
+ /* Check for UNDI loader */
+ undiloader = undi_rom_id.UNDILoader;
+ if ( ! undiloader ) {
+ DBGC ( undirom, "UNDIROM %p has no UNDI loader\n", undirom );
+ return -EINVAL;
+ }
+
+ /* Fill in UNDI ROM loader fields */
+ undirom->loader_entry.segment = undirom->rom_segment;
+ undirom->loader_entry.offset = undiloader;
+ undirom->code_size = undi_rom_id.CodeSize;
+ undirom->data_size = undi_rom_id.DataSize;
+
+ DBGC ( undirom, "UNDIROM %p has UNDI loader at %04x:%04x "
+ "(code %04zx data %04zx)\n", undirom,
+ undirom->loader_entry.segment, undirom->loader_entry.offset,
+ undirom->code_size, undirom->data_size );
+ return 0;
+}
+
+/**
+ * Parse PCI expansion header
+ *
+ * @v undirom UNDI ROM
+ * @v pcirheader Offset within ROM to PCI expansion header
+ */
+static int undirom_parse_pcirheader ( struct undi_rom *undirom,
+ unsigned int pcirheader ) {
+ struct pcir_header pcir_header;
+
+ DBGC ( undirom, "UNDIROM %p has PCI expansion header at %04x:%04x\n",
+ undirom, undirom->rom_segment, pcirheader );
+
+ /* Read PCI expansion header and verify */
+ copy_from_real ( &pcir_header, undirom->rom_segment, pcirheader,
+ sizeof ( pcir_header ) );
+ if ( pcir_header.signature != PCIR_SIGNATURE ) {
+ DBGC ( undirom, "UNDIROM %p has bad PCI expansion header "
+ "signature %08x\n", undirom, pcir_header.signature );
+ return -EINVAL;
+ }
+
+ /* Fill in UNDI ROM PCI device fields */
+ undirom->bus_type = PCI_NIC;
+ undirom->bus_id.pci.vendor_id = pcir_header.vendor_id;
+ undirom->bus_id.pci.device_id = pcir_header.device_id;
+
+ DBGC ( undirom, "UNDIROM %p is for PCI devices %04x:%04x\n", undirom,
+ undirom->bus_id.pci.vendor_id, undirom->bus_id.pci.device_id );
+ return 0;
+
+}
+
+/**
+ * Probe UNDI ROM
+ *
+ * @v rom_segment ROM segment address
+ * @ret rc Return status code
+ */
+static int undirom_probe ( unsigned int rom_segment ) {
+ struct undi_rom *undirom = NULL;
+ struct undi_rom_header romheader;
+ size_t rom_len;
+ unsigned int pxeromid;
+ unsigned int pcirheader;
+ int rc;
+
+ /* Read expansion ROM header and verify */
+ copy_from_real ( &romheader, rom_segment, 0, sizeof ( romheader ) );
+ if ( romheader.Signature != ROM_SIGNATURE ) {
+ rc = -EINVAL;
+ goto err;
+ }
+ rom_len = ( romheader.ROMLength * 512 );
+
+ /* Allocate memory for UNDI ROM */
+ undirom = zalloc ( sizeof ( *undirom ) );
+ if ( ! undirom ) {
+ DBG ( "Could not allocate UNDI ROM structure\n" );
+ rc = -ENOMEM;
+ goto err;
+ }
+ DBGC ( undirom, "UNDIROM %p trying expansion ROM at %04x:0000 "
+ "(%zdkB)\n", undirom, rom_segment, ( rom_len / 1024 ) );
+ undirom->rom_segment = rom_segment;
+
+ /* Check for and parse PXE ROM ID */
+ pxeromid = romheader.PXEROMID;
+ if ( ! pxeromid ) {
+ DBGC ( undirom, "UNDIROM %p has no PXE ROM ID\n", undirom );
+ rc = -EINVAL;
+ goto err;
+ }
+ if ( pxeromid > rom_len ) {
+ DBGC ( undirom, "UNDIROM %p PXE ROM ID outside ROM\n",
+ undirom );
+ rc = -EINVAL;
+ goto err;
+ }
+ if ( ( rc = undirom_parse_pxeromid ( undirom, pxeromid ) ) != 0 )
+ goto err;
+
+ /* Parse PCIR header, if present */
+ pcirheader = romheader.PCIRHeader;
+ if ( pcirheader )
+ undirom_parse_pcirheader ( undirom, pcirheader );
+
+ /* Add to UNDI ROM list and return */
+ DBGC ( undirom, "UNDIROM %p registered\n", undirom );
+ list_add ( &undirom->list, &undiroms );
+ return 0;
+
+ err:
+ free ( undirom );
+ return rc;
+}
+
+/**
+ * Create UNDI ROMs for all possible expansion ROMs
+ *
+ * @ret
+ */
+static void undirom_probe_all_roms ( void ) {
+ static int probed = 0;
+ unsigned int rom_segment;
+
+ /* Perform probe only once */
+ if ( probed )
+ return;
+
+ DBG ( "Scanning for PXE expansion ROMs\n" );
+
+ /* Scan through expansion ROM region at 512 byte intervals */
+ for ( rom_segment = 0xc000 ; rom_segment < 0x10000 ;
+ rom_segment += 0x20 ) {
+ undirom_probe ( rom_segment );
+ }
+
+ probed = 1;
+}
+
+/**
+ * Find UNDI ROM for PCI device
+ *
+ * @v vendor_id PCI vendor ID
+ * @v device_id PCI device ID
+ * @v rombase ROM base address, or 0 for any
+ * @ret undirom UNDI ROM, or NULL
+ */
+struct undi_rom * undirom_find_pci ( unsigned int vendor_id,
+ unsigned int device_id,
+ unsigned int rombase ) {
+ struct undi_rom *undirom;
+
+ undirom_probe_all_roms();
+
+ list_for_each_entry ( undirom, &undiroms, list ) {
+ if ( undirom->bus_type != PCI_NIC )
+ continue;
+ if ( undirom->bus_id.pci.vendor_id != vendor_id )
+ continue;
+ if ( undirom->bus_id.pci.device_id != device_id )
+ continue;
+ if ( rombase && ( ( undirom->rom_segment << 4 ) != rombase ) )
+ continue;
+ DBGC ( undirom, "UNDIROM %p matched PCI %04x:%04x (%08x)\n",
+ undirom, vendor_id, device_id, rombase );
+ return undirom;
+ }
+
+ DBG ( "No UNDI ROM matched PCI %04x:%04x (%08x)\n",
+ vendor_id, device_id, rombase );
+ return NULL;
+}
Code Review / kvmfornfv.git / blobdiff