Joerg Roedel | 736baef | 2012-03-30 11:47:00 -0700 | [diff] [blame] | 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 | } |
Joerg Roedel | 4f3d8b6 | 2012-03-30 11:47:01 -0700 | [diff] [blame] | 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 | } |
Joerg Roedel | 0c3f173 | 2012-03-30 11:47:02 -0700 | [diff] [blame] | 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 | } |
Joerg Roedel | 4c1bad6 | 2012-03-30 11:47:03 -0700 | [diff] [blame] | 113 | |
| 114 | int intr_set_affinity(struct irq_data *data, const struct cpumask *mask, |
| 115 | bool force) |
| 116 | { |
| 117 | if (!remap_ops || !remap_ops->set_affinity) |
| 118 | return 0; |
| 119 | |
| 120 | return remap_ops->set_affinity(data, mask, force); |
| 121 | } |
Joerg Roedel | 9d619f6 | 2012-03-30 11:47:04 -0700 | [diff] [blame^] | 122 | |
| 123 | void intr_free_irq(int irq) |
| 124 | { |
| 125 | if (!remap_ops || !remap_ops->free_irq) |
| 126 | return; |
| 127 | |
| 128 | remap_ops->free_irq(irq); |
| 129 | } |