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736baef4 JR |
1 | #include <linux/kernel.h> |
2 | #include <linux/string.h> | |
3 | #include <linux/errno.h> | |
4 | ||
5 | #include "intr_remapping.h" | |
6 | ||
7 | int intr_remapping_enabled; | |
8 | ||
9 | int disable_intremap; | |
10 | int disable_sourceid_checking; | |
11 | int no_x2apic_optout; | |
12 | ||
13 | static struct irq_remap_ops *remap_ops; | |
14 | ||
15 | static __init int setup_nointremap(char *str) | |
16 | { | |
17 | disable_intremap = 1; | |
18 | return 0; | |
19 | } | |
20 | early_param("nointremap", setup_nointremap); | |
21 | ||
22 | static __init int setup_intremap(char *str) | |
23 | { | |
24 | if (!str) | |
25 | return -EINVAL; | |
26 | ||
27 | while (*str) { | |
28 | if (!strncmp(str, "on", 2)) | |
29 | disable_intremap = 0; | |
30 | else if (!strncmp(str, "off", 3)) | |
31 | disable_intremap = 1; | |
32 | else if (!strncmp(str, "nosid", 5)) | |
33 | disable_sourceid_checking = 1; | |
34 | else if (!strncmp(str, "no_x2apic_optout", 16)) | |
35 | no_x2apic_optout = 1; | |
36 | ||
37 | str += strcspn(str, ","); | |
38 | while (*str == ',') | |
39 | str++; | |
40 | } | |
41 | ||
42 | return 0; | |
43 | } | |
44 | early_param("intremap", setup_intremap); | |
45 | ||
46 | void __init setup_intr_remapping(void) | |
47 | { | |
48 | remap_ops = &intel_irq_remap_ops; | |
49 | } | |
50 | ||
51 | int intr_remapping_supported(void) | |
52 | { | |
53 | if (disable_intremap) | |
54 | return 0; | |
55 | ||
56 | if (!remap_ops || !remap_ops->supported) | |
57 | return 0; | |
58 | ||
59 | return remap_ops->supported(); | |
60 | } | |
61 | ||
62 | int __init intr_hardware_init(void) | |
63 | { | |
64 | if (!remap_ops || !remap_ops->hardware_init) | |
65 | return -ENODEV; | |
66 | ||
67 | return remap_ops->hardware_init(); | |
68 | } | |
69 | ||
70 | int __init intr_hardware_enable(void) | |
71 | { | |
72 | if (!remap_ops || !remap_ops->hardware_enable) | |
73 | return -ENODEV; | |
74 | ||
75 | return remap_ops->hardware_enable(); | |
76 | } | |
4f3d8b67 JR |
77 | |
78 | void intr_hardware_disable(void) | |
79 | { | |
80 | if (!remap_ops || !remap_ops->hardware_disable) | |
81 | return; | |
82 | ||
83 | remap_ops->hardware_disable(); | |
84 | } | |
85 | ||
86 | int intr_hardware_reenable(int mode) | |
87 | { | |
88 | if (!remap_ops || !remap_ops->hardware_reenable) | |
89 | return 0; | |
90 | ||
91 | return remap_ops->hardware_reenable(mode); | |
92 | } | |
93 | ||
94 | int __init intr_enable_fault_handling(void) | |
95 | { | |
96 | if (!remap_ops || !remap_ops->enable_faulting) | |
97 | return -ENODEV; | |
98 | ||
99 | return remap_ops->enable_faulting(); | |
100 | } | |
0c3f173a JR |
101 | |
102 | int intr_setup_ioapic_entry(int irq, | |
103 | struct IO_APIC_route_entry *entry, | |
104 | unsigned int destination, int vector, | |
105 | struct io_apic_irq_attr *attr) | |
106 | { | |
107 | if (!remap_ops || !remap_ops->setup_ioapic_entry) | |
108 | return -ENODEV; | |
109 | ||
110 | return remap_ops->setup_ioapic_entry(irq, entry, destination, | |
111 | vector, attr); | |
112 | } |