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 = { domain, bus, slot, func,
29 vendor, dev };
30 struct pci_dev *device;
31
32 *pacc = pci_alloc();
33 if (*pacc == NULL)
34 return NULL;
35
36 pci_init(*pacc);
37 pci_scan_bus(*pacc);
38
39 for (device = (*pacc)->devices; device; device = device->next) {
40 if (pci_filter_match(&filter_nb_link, device))
41 return device;
42 }
43 pci_cleanup(*pacc);
44 return NULL;
45 }
46
47 /* Typically one wants to get a specific slot(device)/func of the root domain
48 and bus */
pci_slot_func_init(struct pci_access ** pacc,int slot,int func)49 struct pci_dev *pci_slot_func_init(struct pci_access **pacc, int slot,
50 int func)
51 {
52 return pci_acc_init(pacc, 0, 0, slot, func, -1, -1);
53 }
54
55 #endif /* defined(__i386__) || defined(__x86_64__) */
56