1 /* 2 * Copyright (C) 2007 Michael Brown <mbrown (at) fensystems.co.uk>. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License as 6 * published by the Free Software Foundation; either version 2 of the 7 * License, or any later version. 8 * 9 * This program is distributed in the hope that it will be useful, but 10 * WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 17 */ 18 19 FILE_LICENCE ( GPL2_OR_LATER ); 20 21 #include <stdint.h> 22 #include <stdlib.h> 23 #include <stdio.h> 24 #include <string.h> 25 #include <gpxe/pci.h> 26 #include <undi.h> 27 #include <undirom.h> 28 #include <undiload.h> 29 #include <undinet.h> 30 #include <undipreload.h> 31 32 /** @file 33 * 34 * UNDI PCI driver 35 * 36 */ 37 38 /** 39 * Find UNDI ROM for PCI device 40 * 41 * @v pci PCI device 42 * @ret undirom UNDI ROM, or NULL 43 * 44 * Try to find a driver for this device. Try an exact match on the 45 * ROM address first, then fall back to a vendor/device ID match only 46 */ 47 static struct undi_rom * undipci_find_rom ( struct pci_device *pci ) { 48 struct undi_rom *undirom; 49 unsigned long rombase; 50 51 rombase = pci_bar_start ( pci, PCI_ROM_ADDRESS ); 52 undirom = undirom_find_pci ( pci->vendor, pci->device, rombase ); 53 if ( ! undirom ) 54 undirom = undirom_find_pci ( pci->vendor, pci->device, 0 ); 55 return undirom; 56 } 57 58 /** 59 * Probe PCI device 60 * 61 * @v pci PCI device 62 * @v id PCI ID 63 * @ret rc Return status code 64 */ 65 static int undipci_probe ( struct pci_device *pci, 66 const struct pci_device_id *id __unused ) { 67 struct undi_device *undi; 68 struct undi_rom *undirom; 69 unsigned int busdevfn = PCI_BUSDEVFN ( pci->bus, pci->devfn ); 70 int rc; 71 72 /* Ignore non-network devices */ 73 if ( PCI_BASE_CLASS ( pci->class ) != PCI_BASE_CLASS_NETWORK ) 74 return -ENOTTY; 75 76 /* Allocate UNDI device structure */ 77 undi = zalloc ( sizeof ( *undi ) ); 78 if ( ! undi ) 79 return -ENOMEM; 80 pci_set_drvdata ( pci, undi ); 81 82 /* Find/create our pixie */ 83 if ( preloaded_undi.pci_busdevfn == busdevfn ) { 84 /* Claim preloaded UNDI device */ 85 DBGC ( undi, "UNDI %p using preloaded UNDI device\n", undi ); 86 memcpy ( undi, &preloaded_undi, sizeof ( *undi ) ); 87 memset ( &preloaded_undi, 0, sizeof ( preloaded_undi ) ); 88 } else { 89 /* Find UNDI ROM for PCI device */ 90 if ( ! ( undirom = undipci_find_rom ( pci ) ) ) { 91 rc = -ENODEV; 92 goto err_find_rom; 93 } 94 95 /* Call UNDI ROM loader to create pixie */ 96 if ( ( rc = undi_load_pci ( undi, undirom, busdevfn ) ) != 0 ) 97 goto err_load_pci; 98 } 99 100 /* Add to device hierarchy */ 101 snprintf ( undi->dev.name, sizeof ( undi->dev.name ), 102 "UNDI-%s", pci->dev.name ); 103 memcpy ( &undi->dev.desc, &pci->dev.desc, sizeof ( undi->dev.desc ) ); 104 undi->dev.parent = &pci->dev; 105 INIT_LIST_HEAD ( &undi->dev.children ); 106 list_add ( &undi->dev.siblings, &pci->dev.children ); 107 108 /* Create network device */ 109 if ( ( rc = undinet_probe ( undi ) ) != 0 ) 110 goto err_undinet_probe; 111 112 return 0; 113 114 err_undinet_probe: 115 undi_unload ( undi ); 116 list_del ( &undi->dev.siblings ); 117 err_find_rom: 118 err_load_pci: 119 free ( undi ); 120 pci_set_drvdata ( pci, NULL ); 121 return rc; 122 } 123 124 /** 125 * Remove PCI device 126 * 127 * @v pci PCI device 128 */ 129 static void undipci_remove ( struct pci_device *pci ) { 130 struct undi_device *undi = pci_get_drvdata ( pci ); 131 132 undinet_remove ( undi ); 133 undi_unload ( undi ); 134 list_del ( &undi->dev.siblings ); 135 free ( undi ); 136 pci_set_drvdata ( pci, NULL ); 137 } 138 139 static struct pci_device_id undipci_nics[] = { 140 PCI_ROM ( 0xffff, 0xffff, "undipci", "UNDI (PCI)", 0 ), 141 }; 142 143 struct pci_driver undipci_driver __pci_driver = { 144 .ids = undipci_nics, 145 .id_count = ( sizeof ( undipci_nics ) / sizeof ( undipci_nics[0] ) ), 146 .probe = undipci_probe, 147 .remove = undipci_remove, 148 }; 149
