1 // SPDX-License-Identifier: GPL-2.0
2 #if defined(__i386__) || defined(__x86_64__)
4 #include <helpers/helpers.h>
9 * PCI access helper function depending on libpci
11 * **pacc : if a valid pci_dev is returned
12 * *pacc must be passed to pci_acc_cleanup to free it
20 * Pass -1 for one of the six above to match any
23 * struct pci_dev which can be used with pci_{read,write}_* functions
24 * to access the PCI config space of matching pci devices
26 struct pci_dev
*pci_acc_init(struct pci_access
**pacc
, int domain
, int bus
,
27 int slot
, int func
, int vendor
, int dev
)
29 struct pci_filter filter_nb_link
;
30 struct pci_dev
*device
;
36 pci_filter_init(*pacc
, &filter_nb_link
);
37 filter_nb_link
.domain
= domain
;
38 filter_nb_link
.bus
= bus
;
39 filter_nb_link
.slot
= slot
;
40 filter_nb_link
.func
= func
;
41 filter_nb_link
.vendor
= vendor
;
42 filter_nb_link
.device
= dev
;
47 for (device
= (*pacc
)->devices
; device
; device
= device
->next
) {
48 if (pci_filter_match(&filter_nb_link
, device
))
55 /* Typically one wants to get a specific slot(device)/func of the root domain
57 struct pci_dev
*pci_slot_func_init(struct pci_access
**pacc
, int slot
,
60 return pci_acc_init(pacc
, 0, 0, slot
, func
, -1, -1);
63 #endif /* defined(__i386__) || defined(__x86_64__) */