1 // SPDX-License-Identifier: GPL-2.0 1 // SPDX-License-Identifier: GPL-2.0
2 #if defined(__i386__) || defined(__x86_64__) 2 #if defined(__i386__) || defined(__x86_64__)
3 3
4 #include <helpers/helpers.h> 4 #include <helpers/helpers.h>
5 5
6 /* 6 /*
7 * pci_acc_init 7 * pci_acc_init
8 * 8 *
9 * PCI access helper function depending on lib 9 * PCI access helper function depending on libpci
10 * 10 *
11 * **pacc : if a valid pci_dev is returned 11 * **pacc : if a valid pci_dev is returned
12 * *pacc must be passed to pci_acc_cle 12 * *pacc must be passed to pci_acc_cleanup to free it
13 * 13 *
14 * domain: domain 14 * domain: domain
15 * bus: bus 15 * bus: bus
16 * slot: slot 16 * slot: slot
17 * func: func 17 * func: func
18 * vendor: vendor 18 * vendor: vendor
19 * device: device 19 * device: device
20 * Pass -1 for one of the six above to match a 20 * Pass -1 for one of the six above to match any
21 * 21 *
22 * Returns : 22 * Returns :
23 * struct pci_dev which can be used with pci_{ 23 * struct pci_dev which can be used with pci_{read,write}_* functions
24 * to access the PCI config spa 24 * to access the PCI config space of matching pci devices
25 */ 25 */
26 struct pci_dev *pci_acc_init(struct pci_access 26 struct pci_dev *pci_acc_init(struct pci_access **pacc, int domain, int bus,
27 int slot, int fun 27 int slot, int func, int vendor, int dev)
28 { 28 {
29 struct pci_filter filter_nb_link; 29 struct pci_filter filter_nb_link;
30 struct pci_dev *device; 30 struct pci_dev *device;
31 31
32 *pacc = pci_alloc(); 32 *pacc = pci_alloc();
33 if (*pacc == NULL) 33 if (*pacc == NULL)
34 return NULL; 34 return NULL;
35 35
36 pci_filter_init(*pacc, &filter_nb_link 36 pci_filter_init(*pacc, &filter_nb_link);
37 filter_nb_link.domain = domain; 37 filter_nb_link.domain = domain;
38 filter_nb_link.bus = bus; 38 filter_nb_link.bus = bus;
39 filter_nb_link.slot = slot; 39 filter_nb_link.slot = slot;
40 filter_nb_link.func = func; 40 filter_nb_link.func = func;
41 filter_nb_link.vendor = vendor; 41 filter_nb_link.vendor = vendor;
42 filter_nb_link.device = dev; 42 filter_nb_link.device = dev;
43 43
44 pci_init(*pacc); 44 pci_init(*pacc);
45 pci_scan_bus(*pacc); 45 pci_scan_bus(*pacc);
46 46
47 for (device = (*pacc)->devices; device 47 for (device = (*pacc)->devices; device; device = device->next) {
48 if (pci_filter_match(&filter_n 48 if (pci_filter_match(&filter_nb_link, device))
49 return device; 49 return device;
50 } 50 }
51 pci_cleanup(*pacc); 51 pci_cleanup(*pacc);
52 return NULL; 52 return NULL;
53 } 53 }
54 54
55 /* Typically one wants to get a specific slot( 55 /* Typically one wants to get a specific slot(device)/func of the root domain
56 and bus */ 56 and bus */
57 struct pci_dev *pci_slot_func_init(struct pci_ 57 struct pci_dev *pci_slot_func_init(struct pci_access **pacc, int slot,
58 int fun 58 int func)
59 { 59 {
60 return pci_acc_init(pacc, 0, 0, slot, 60 return pci_acc_init(pacc, 0, 0, slot, func, -1, -1);
61 } 61 }
62 62
63 #endif /* defined(__i386__) || defined(__x86_6 63 #endif /* defined(__i386__) || defined(__x86_64__) */
64 64
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