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 */ 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 */ 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