Commit | Line | Data |
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1da177e4 LT |
1 | #include <linux/kernel.h> |
2 | #include <linux/pci.h> | |
3 | #include <linux/module.h> | |
4 | #include "pci.h" | |
5 | ||
6 | int pci_hotplug (struct device *dev, char **envp, int num_envp, | |
7 | char *buffer, int buffer_size) | |
8 | { | |
9 | struct pci_dev *pdev; | |
10 | char *scratch; | |
11 | int i = 0; | |
12 | int length = 0; | |
13 | ||
14 | if (!dev) | |
15 | return -ENODEV; | |
16 | ||
17 | pdev = to_pci_dev(dev); | |
18 | if (!pdev) | |
19 | return -ENODEV; | |
20 | ||
21 | scratch = buffer; | |
22 | ||
23 | /* stuff we want to pass to /sbin/hotplug */ | |
24 | envp[i++] = scratch; | |
25 | length += scnprintf (scratch, buffer_size - length, "PCI_CLASS=%04X", | |
26 | pdev->class); | |
27 | if ((buffer_size - length <= 0) || (i >= num_envp)) | |
28 | return -ENOMEM; | |
29 | ++length; | |
30 | scratch += length; | |
31 | ||
32 | envp[i++] = scratch; | |
33 | length += scnprintf (scratch, buffer_size - length, "PCI_ID=%04X:%04X", | |
34 | pdev->vendor, pdev->device); | |
35 | if ((buffer_size - length <= 0) || (i >= num_envp)) | |
36 | return -ENOMEM; | |
37 | ++length; | |
38 | scratch += length; | |
39 | ||
40 | envp[i++] = scratch; | |
41 | length += scnprintf (scratch, buffer_size - length, | |
42 | "PCI_SUBSYS_ID=%04X:%04X", pdev->subsystem_vendor, | |
43 | pdev->subsystem_device); | |
44 | if ((buffer_size - length <= 0) || (i >= num_envp)) | |
45 | return -ENOMEM; | |
46 | ++length; | |
47 | scratch += length; | |
48 | ||
49 | envp[i++] = scratch; | |
50 | length += scnprintf (scratch, buffer_size - length, "PCI_SLOT_NAME=%s", | |
51 | pci_name(pdev)); | |
52 | if ((buffer_size - length <= 0) || (i >= num_envp)) | |
53 | return -ENOMEM; | |
54 | ||
55 | envp[i] = NULL; | |
56 | ||
57 | return 0; | |
58 | } | |
59 | ||
60 | static int pci_visit_bus (struct pci_visit * fn, struct pci_bus_wrapped *wrapped_bus, struct pci_dev_wrapped *wrapped_parent) | |
61 | { | |
62 | struct list_head *ln; | |
63 | struct pci_dev *dev; | |
64 | struct pci_dev_wrapped wrapped_dev; | |
65 | int result = 0; | |
66 | ||
67 | pr_debug("PCI: Scanning bus %04x:%02x\n", pci_domain_nr(wrapped_bus->bus), | |
68 | wrapped_bus->bus->number); | |
69 | ||
70 | if (fn->pre_visit_pci_bus) { | |
71 | result = fn->pre_visit_pci_bus(wrapped_bus, wrapped_parent); | |
72 | if (result) | |
73 | return result; | |
74 | } | |
75 | ||
76 | ln = wrapped_bus->bus->devices.next; | |
77 | while (ln != &wrapped_bus->bus->devices) { | |
78 | dev = pci_dev_b(ln); | |
79 | ln = ln->next; | |
80 | ||
81 | memset(&wrapped_dev, 0, sizeof(struct pci_dev_wrapped)); | |
82 | wrapped_dev.dev = dev; | |
83 | ||
84 | result = pci_visit_dev(fn, &wrapped_dev, wrapped_bus); | |
85 | if (result) | |
86 | return result; | |
87 | } | |
88 | ||
89 | if (fn->post_visit_pci_bus) | |
90 | result = fn->post_visit_pci_bus(wrapped_bus, wrapped_parent); | |
91 | ||
92 | return result; | |
93 | } | |
94 | ||
95 | static int pci_visit_bridge (struct pci_visit * fn, | |
96 | struct pci_dev_wrapped *wrapped_dev, | |
97 | struct pci_bus_wrapped *wrapped_parent) | |
98 | { | |
99 | struct pci_bus *bus; | |
100 | struct pci_bus_wrapped wrapped_bus; | |
101 | int result = 0; | |
102 | ||
103 | pr_debug("PCI: Scanning bridge %s\n", pci_name(wrapped_dev->dev)); | |
104 | ||
105 | if (fn->visit_pci_dev) { | |
106 | result = fn->visit_pci_dev(wrapped_dev, wrapped_parent); | |
107 | if (result) | |
108 | return result; | |
109 | } | |
110 | ||
111 | bus = wrapped_dev->dev->subordinate; | |
112 | if (bus) { | |
113 | memset(&wrapped_bus, 0, sizeof(struct pci_bus_wrapped)); | |
114 | wrapped_bus.bus = bus; | |
115 | ||
116 | result = pci_visit_bus(fn, &wrapped_bus, wrapped_dev); | |
117 | } | |
118 | return result; | |
119 | } | |
120 | ||
121 | /** | |
122 | * pci_visit_dev - scans the pci buses. | |
67be2dd1 MW |
123 | * @fn: callback functions that are called while visiting |
124 | * @wrapped_dev: the device to scan | |
125 | * @wrapped_parent: the bus where @wrapped_dev is connected to | |
126 | * | |
1da177e4 LT |
127 | * Every bus and every function is presented to a custom |
128 | * function that can act upon it. | |
129 | */ | |
130 | int pci_visit_dev(struct pci_visit *fn, struct pci_dev_wrapped *wrapped_dev, | |
131 | struct pci_bus_wrapped *wrapped_parent) | |
132 | { | |
133 | struct pci_dev* dev = wrapped_dev ? wrapped_dev->dev : NULL; | |
134 | int result = 0; | |
135 | ||
136 | if (!dev) | |
137 | return 0; | |
138 | ||
139 | if (fn->pre_visit_pci_dev) { | |
140 | result = fn->pre_visit_pci_dev(wrapped_dev, wrapped_parent); | |
141 | if (result) | |
142 | return result; | |
143 | } | |
144 | ||
145 | switch (dev->class >> 8) { | |
146 | case PCI_CLASS_BRIDGE_PCI: | |
147 | result = pci_visit_bridge(fn, wrapped_dev, | |
148 | wrapped_parent); | |
149 | if (result) | |
150 | return result; | |
151 | break; | |
152 | default: | |
153 | pr_debug("PCI: Scanning device %s\n", pci_name(dev)); | |
154 | if (fn->visit_pci_dev) { | |
155 | result = fn->visit_pci_dev (wrapped_dev, | |
156 | wrapped_parent); | |
157 | if (result) | |
158 | return result; | |
159 | } | |
160 | } | |
161 | ||
162 | if (fn->post_visit_pci_dev) | |
163 | result = fn->post_visit_pci_dev(wrapped_dev, wrapped_parent); | |
164 | ||
165 | return result; | |
166 | } | |
167 | EXPORT_SYMBOL(pci_visit_dev); |