1#if defined(__i386__) || defined(__x86_64__)
2
3#include <helpers/helpers.h>
4
5/*
6 * pci_acc_init
7 *
8 * PCI access helper function depending on libpci
9 *
10 * **pacc : if a valid pci_dev is returned
11 *         *pacc must be passed to pci_acc_cleanup to free it
12 *
13 * domain: domain
14 * bus:    bus
15 * slot:   slot
16 * func:   func
17 * vendor: vendor
18 * device: device
19 * Pass -1 for one of the six above to match any
20 *
21 * Returns :
22 * struct pci_dev which can be used with pci_{read,write}_* functions
23 *                to access the PCI config space of matching pci devices
24 */
25struct pci_dev *pci_acc_init(struct pci_access **pacc, int domain, int bus,
26			     int slot, int func, int vendor, int dev)
27{
28	struct pci_filter filter_nb_link;
29	struct pci_dev *device;
30
31	*pacc = pci_alloc();
32	if (*pacc == NULL)
33		return NULL;
34
35	pci_filter_init(*pacc, &filter_nb_link);
36	filter_nb_link.domain	= domain;
37	filter_nb_link.bus	= bus;
38	filter_nb_link.slot	= slot;
39	filter_nb_link.func	= func;
40	filter_nb_link.vendor	= vendor;
41	filter_nb_link.device	= dev;
42
43	pci_init(*pacc);
44	pci_scan_bus(*pacc);
45
46	for (device = (*pacc)->devices; device; device = device->next) {
47		if (pci_filter_match(&filter_nb_link, device))
48			return device;
49	}
50	pci_cleanup(*pacc);
51	return NULL;
52}
53
54/* Typically one wants to get a specific slot(device)/func of the root domain
55   and bus */
56struct pci_dev *pci_slot_func_init(struct pci_access **pacc, int slot,
57				       int func)
58{
59	return pci_acc_init(pacc, 0, 0, slot, func, -1, -1);
60}
61
62#endif /* defined(__i386__) || defined(__x86_64__) */
63