| // SPDX-License-Identifier: GPL-2.0 |
| #if defined(__i386__) || defined(__x86_64__) |
| |
| #include <helpers/helpers.h> |
| |
| /* |
| * pci_acc_init |
| * |
| * PCI access helper function depending on libpci |
| * |
| * **pacc : if a valid pci_dev is returned |
| * *pacc must be passed to pci_acc_cleanup to free it |
| * |
| * domain: domain |
| * bus: bus |
| * slot: slot |
| * func: func |
| * vendor: vendor |
| * device: device |
| * Pass -1 for one of the six above to match any |
| * |
| * Returns : |
| * struct pci_dev which can be used with pci_{read,write}_* functions |
| * to access the PCI config space of matching pci devices |
| */ |
| struct pci_dev *pci_acc_init(struct pci_access **pacc, int domain, int bus, |
| int slot, int func, int vendor, int dev) |
| { |
| struct pci_filter filter_nb_link; |
| struct pci_dev *device; |
| |
| *pacc = pci_alloc(); |
| if (*pacc == NULL) |
| return NULL; |
| |
| pci_filter_init(*pacc, &filter_nb_link); |
| filter_nb_link.domain = domain; |
| filter_nb_link.bus = bus; |
| filter_nb_link.slot = slot; |
| filter_nb_link.func = func; |
| filter_nb_link.vendor = vendor; |
| filter_nb_link.device = dev; |
| |
| pci_init(*pacc); |
| pci_scan_bus(*pacc); |
| |
| for (device = (*pacc)->devices; device; device = device->next) { |
| if (pci_filter_match(&filter_nb_link, device)) |
| return device; |
| } |
| pci_cleanup(*pacc); |
| return NULL; |
| } |
| |
| /* Typically one wants to get a specific slot(device)/func of the root domain |
| and bus */ |
| struct pci_dev *pci_slot_func_init(struct pci_access **pacc, int slot, |
| int func) |
| { |
| return pci_acc_init(pacc, 0, 0, slot, func, -1, -1); |
| } |
| |
| #endif /* defined(__i386__) || defined(__x86_64__) */ |
