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