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 */
pci_acc_init(struct pci_access ** pacc,int domain,int bus,int slot,int func,int vendor,int dev)25 struct 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 */
pci_slot_func_init(struct pci_access ** pacc,int slot,int func)56 struct 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