1 /* pci-stub - simple stub driver to reserve a pci device
3 * Copyright (C) 2008 Red Hat, Inc.
7 * This work is licensed under the terms of the GNU GPL, version 2.
9 * Usage is simple, allocate a new id to the stub driver and bind the
10 * device to it. For example:
12 * # echo "8086 10f5" > /sys/bus/pci/drivers/pci-stub/new_id
13 * # echo -n 0000:00:19.0 > /sys/bus/pci/drivers/e1000e/unbind
14 * # echo -n 0000:00:19.0 > /sys/bus/pci/drivers/pci-stub/bind
15 * # ls -l /sys/bus/pci/devices/0000:00:19.0/driver
16 * .../0000:00:19.0/driver -> ../../../bus/pci/drivers/pci-stub
19 #include <linux/module.h>
20 #include <linux/pci.h>
22 static char ids
[1024] __initdata
;
24 module_param_string(ids
, ids
, sizeof(ids
), 0);
25 MODULE_PARM_DESC(ids
, "Initial PCI IDs to add to the stub driver, format is "
26 "\"vendor:device[:subvendor[:subdevice[:class[:class_mask]]]]\""
27 " and multiple comma separated entries can be specified");
29 static int pci_stub_probe(struct pci_dev
*dev
, const struct pci_device_id
*id
)
31 dev_info(&dev
->dev
, "claimed by stub\n");
35 static struct pci_driver stub_driver
= {
37 .id_table
= NULL
, /* only dynamic id's */
38 .probe
= pci_stub_probe
,
41 static int __init
pci_stub_init(void)
46 rc
= pci_register_driver(&stub_driver
);
50 /* no ids passed actually */
54 /* add ids specified in the module parameter */
56 while ((id
= strsep(&p
, ","))) {
57 unsigned int vendor
, device
, subvendor
= PCI_ANY_ID
,
58 subdevice
= PCI_ANY_ID
, class = 0, class_mask
= 0;
64 fields
= sscanf(id
, "%x:%x:%x:%x:%x:%x",
65 &vendor
, &device
, &subvendor
, &subdevice
,
70 "pci-stub: invalid id string \"%s\"\n", id
);
75 "pci-stub: add %04X:%04X sub=%04X:%04X cls=%08X/%08X\n",
76 vendor
, device
, subvendor
, subdevice
, class, class_mask
);
78 rc
= pci_add_dynid(&stub_driver
, vendor
, device
,
79 subvendor
, subdevice
, class, class_mask
, 0);
82 "pci-stub: failed to add dynamic id (%d)\n", rc
);
88 static void __exit
pci_stub_exit(void)
90 pci_unregister_driver(&stub_driver
);
93 module_init(pci_stub_init
);
94 module_exit(pci_stub_exit
);
96 MODULE_LICENSE("GPL");
97 MODULE_AUTHOR("Chris Wright <chrisw@sous-sol.org>");
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