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 = { 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 */ 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