1 /*
2 * Copyright (C) 2007 Michael Brown <mbrown@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 */
undipci_find_rom(struct pci_device * pci)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 */
undipci_probe(struct pci_device * pci,const struct pci_device_id * id __unused)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 */
undipci_remove(struct pci_device * pci)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