Commit | Line | Data |
---|---|---|
30edc14b KRW |
1 | /* |
2 | * PCI Backend - Handle special overlays for broken devices. | |
3 | * | |
4 | * Author: Ryan Wilson <hap9@epoch.ncsc.mil> | |
5 | * Author: Chris Bookholt <hap10@epoch.ncsc.mil> | |
6 | */ | |
7 | ||
8 | #include <linux/kernel.h> | |
9 | #include <linux/pci.h> | |
10 | #include "pciback.h" | |
11 | #include "conf_space.h" | |
12 | #include "conf_space_quirks.h" | |
13 | ||
a92336a1 | 14 | LIST_HEAD(xen_pcibk_quirks); |
30edc14b KRW |
15 | static inline const struct pci_device_id * |
16 | match_one_device(const struct pci_device_id *id, const struct pci_dev *dev) | |
17 | { | |
18 | if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) && | |
19 | (id->device == PCI_ANY_ID || id->device == dev->device) && | |
20 | (id->subvendor == PCI_ANY_ID || | |
21 | id->subvendor == dev->subsystem_vendor) && | |
22 | (id->subdevice == PCI_ANY_ID || | |
23 | id->subdevice == dev->subsystem_device) && | |
24 | !((id->class ^ dev->class) & id->class_mask)) | |
25 | return id; | |
26 | return NULL; | |
27 | } | |
28 | ||
a92336a1 | 29 | static struct xen_pcibk_config_quirk *xen_pcibk_find_quirk(struct pci_dev *dev) |
30edc14b | 30 | { |
a92336a1 | 31 | struct xen_pcibk_config_quirk *tmp_quirk; |
30edc14b | 32 | |
a92336a1 | 33 | list_for_each_entry(tmp_quirk, &xen_pcibk_quirks, quirks_list) |
30edc14b KRW |
34 | if (match_one_device(&tmp_quirk->devid, dev) != NULL) |
35 | goto out; | |
36 | tmp_quirk = NULL; | |
a92336a1 | 37 | printk(KERN_DEBUG DRV_NAME |
402c5e15 | 38 | ": quirk didn't match any device known\n"); |
30edc14b KRW |
39 | out: |
40 | return tmp_quirk; | |
41 | } | |
42 | ||
a92336a1 | 43 | static inline void register_quirk(struct xen_pcibk_config_quirk *quirk) |
30edc14b | 44 | { |
a92336a1 | 45 | list_add_tail(&quirk->quirks_list, &xen_pcibk_quirks); |
30edc14b KRW |
46 | } |
47 | ||
a92336a1 | 48 | int xen_pcibk_field_is_dup(struct pci_dev *dev, unsigned int reg) |
30edc14b KRW |
49 | { |
50 | int ret = 0; | |
a92336a1 | 51 | struct xen_pcibk_dev_data *dev_data = pci_get_drvdata(dev); |
30edc14b KRW |
52 | struct config_field_entry *cfg_entry; |
53 | ||
54 | list_for_each_entry(cfg_entry, &dev_data->config_fields, list) { | |
55 | if (OFFSET(cfg_entry) == reg) { | |
56 | ret = 1; | |
57 | break; | |
58 | } | |
59 | } | |
60 | return ret; | |
61 | } | |
62 | ||
a92336a1 | 63 | int xen_pcibk_config_quirks_add_field(struct pci_dev *dev, struct config_field |
30edc14b KRW |
64 | *field) |
65 | { | |
66 | int err = 0; | |
67 | ||
68 | switch (field->size) { | |
69 | case 1: | |
a92336a1 KRW |
70 | field->u.b.read = xen_pcibk_read_config_byte; |
71 | field->u.b.write = xen_pcibk_write_config_byte; | |
30edc14b KRW |
72 | break; |
73 | case 2: | |
a92336a1 KRW |
74 | field->u.w.read = xen_pcibk_read_config_word; |
75 | field->u.w.write = xen_pcibk_write_config_word; | |
30edc14b KRW |
76 | break; |
77 | case 4: | |
a92336a1 KRW |
78 | field->u.dw.read = xen_pcibk_read_config_dword; |
79 | field->u.dw.write = xen_pcibk_write_config_dword; | |
30edc14b KRW |
80 | break; |
81 | default: | |
82 | err = -EINVAL; | |
83 | goto out; | |
84 | } | |
85 | ||
a92336a1 | 86 | xen_pcibk_config_add_field(dev, field); |
30edc14b KRW |
87 | |
88 | out: | |
89 | return err; | |
90 | } | |
91 | ||
a92336a1 | 92 | int xen_pcibk_config_quirks_init(struct pci_dev *dev) |
30edc14b | 93 | { |
a92336a1 | 94 | struct xen_pcibk_config_quirk *quirk; |
30edc14b KRW |
95 | int ret = 0; |
96 | ||
97 | quirk = kzalloc(sizeof(*quirk), GFP_ATOMIC); | |
98 | if (!quirk) { | |
99 | ret = -ENOMEM; | |
100 | goto out; | |
101 | } | |
102 | ||
103 | quirk->devid.vendor = dev->vendor; | |
104 | quirk->devid.device = dev->device; | |
105 | quirk->devid.subvendor = dev->subsystem_vendor; | |
106 | quirk->devid.subdevice = dev->subsystem_device; | |
107 | quirk->devid.class = 0; | |
108 | quirk->devid.class_mask = 0; | |
109 | quirk->devid.driver_data = 0UL; | |
110 | ||
111 | quirk->pdev = dev; | |
112 | ||
113 | register_quirk(quirk); | |
114 | out: | |
115 | return ret; | |
116 | } | |
117 | ||
a92336a1 | 118 | void xen_pcibk_config_field_free(struct config_field *field) |
30edc14b KRW |
119 | { |
120 | kfree(field); | |
121 | } | |
122 | ||
a92336a1 | 123 | int xen_pcibk_config_quirk_release(struct pci_dev *dev) |
30edc14b | 124 | { |
a92336a1 | 125 | struct xen_pcibk_config_quirk *quirk; |
30edc14b KRW |
126 | int ret = 0; |
127 | ||
a92336a1 | 128 | quirk = xen_pcibk_find_quirk(dev); |
30edc14b KRW |
129 | if (!quirk) { |
130 | ret = -ENXIO; | |
131 | goto out; | |
132 | } | |
133 | ||
134 | list_del(&quirk->quirks_list); | |
135 | kfree(quirk); | |
136 | ||
137 | out: | |
138 | return ret; | |
139 | } |