2 * PCI Backend - Handle special overlays for broken devices.
4 * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
5 * Author: Chris Bookholt <hap10@epoch.ncsc.mil>
8 #include <linux/kernel.h>
11 #include "conf_space.h"
12 #include "conf_space_quirks.h"
14 LIST_HEAD(pciback_quirks);
16 struct pciback_config_quirk *pciback_find_quirk(struct pci_dev *dev)
18 struct pciback_config_quirk *tmp_quirk;
20 list_for_each_entry(tmp_quirk, &pciback_quirks, quirks_list)
21 if (pci_match_id(&tmp_quirk->devid, dev))
25 "quirk didn't match any device pciback knows about\n");
30 static inline void register_quirk(struct pciback_config_quirk *quirk)
32 list_add_tail(&quirk->quirks_list, &pciback_quirks);
35 int pciback_field_is_dup(struct pci_dev *dev, int reg)
38 struct pciback_dev_data *dev_data = pci_get_drvdata(dev);
39 struct config_field *field;
40 struct config_field_entry *cfg_entry;
42 list_for_each_entry(cfg_entry, &dev_data->config_fields, list) {
43 field = cfg_entry->field;
44 if (field->offset == reg) {
52 int pciback_config_quirks_add_field(struct pci_dev *dev, struct config_field
57 switch (field->size) {
59 field->u.b.read = pciback_read_config_byte;
60 field->u.b.write = pciback_write_config_byte;
63 field->u.w.read = pciback_read_config_word;
64 field->u.w.write = pciback_write_config_word;
67 field->u.dw.read = pciback_read_config_dword;
68 field->u.dw.write = pciback_write_config_dword;
75 pciback_config_add_field(dev, field);
81 int pciback_config_quirks_init(struct pci_dev *dev)
83 struct pciback_config_quirk *quirk;
86 quirk = kzalloc(sizeof(*quirk), GFP_ATOMIC);
92 quirk->devid.vendor = dev->vendor;
93 quirk->devid.device = dev->device;
94 quirk->devid.subvendor = dev->subsystem_vendor;
95 quirk->devid.subdevice = dev->subsystem_device;
96 quirk->devid.class = 0;
97 quirk->devid.class_mask = 0;
98 quirk->devid.driver_data = 0UL;
102 register_quirk(quirk);
107 void pciback_config_field_free(struct config_field *field)
112 int pciback_config_quirk_release(struct pci_dev *dev)
114 struct pciback_config_quirk *quirk;
117 quirk = pciback_find_quirk(dev);
123 list_del(&quirk->quirks_list);