Commit | Line | Data |
---|---|---|
1c4248ca | 1 | #include <linux/cpumask.h> |
736baef4 JR |
2 | #include <linux/kernel.h> |
3 | #include <linux/string.h> | |
98f1ad25 | 4 | #include <linux/cpumask.h> |
736baef4 | 5 | #include <linux/errno.h> |
98f1ad25 JR |
6 | #include <linux/msi.h> |
7 | ||
8 | #include <asm/hw_irq.h> | |
9 | #include <asm/irq_remapping.h> | |
1c4248ca JR |
10 | #include <asm/processor.h> |
11 | #include <asm/x86_init.h> | |
12 | #include <asm/apic.h> | |
736baef4 | 13 | |
8a8f422d | 14 | #include "irq_remapping.h" |
736baef4 | 15 | |
95a02e97 | 16 | int irq_remapping_enabled; |
736baef4 | 17 | |
95a02e97 | 18 | int disable_irq_remap; |
736baef4 JR |
19 | int disable_sourceid_checking; |
20 | int no_x2apic_optout; | |
21 | ||
22 | static struct irq_remap_ops *remap_ops; | |
23 | ||
1c4248ca JR |
24 | static void irq_remapping_disable_io_apic(void) |
25 | { | |
26 | /* | |
27 | * With interrupt-remapping, for now we will use virtual wire A | |
28 | * mode, as virtual wire B is little complex (need to configure | |
29 | * both IOAPIC RTE as well as interrupt-remapping table entry). | |
30 | * As this gets called during crash dump, keep this simple for | |
31 | * now. | |
32 | */ | |
33 | if (cpu_has_apic || apic_from_smp_config()) | |
34 | disconnect_bsp_APIC(0); | |
35 | } | |
36 | ||
37 | static void __init irq_remapping_modify_x86_ops(void) | |
38 | { | |
71054d88 JR |
39 | x86_io_apic_ops.disable = irq_remapping_disable_io_apic; |
40 | x86_msi.setup_hpet_msi = setup_hpet_msi_remapped; | |
1c4248ca JR |
41 | } |
42 | ||
736baef4 JR |
43 | static __init int setup_nointremap(char *str) |
44 | { | |
95a02e97 | 45 | disable_irq_remap = 1; |
736baef4 JR |
46 | return 0; |
47 | } | |
48 | early_param("nointremap", setup_nointremap); | |
49 | ||
95a02e97 | 50 | static __init int setup_irqremap(char *str) |
736baef4 JR |
51 | { |
52 | if (!str) | |
53 | return -EINVAL; | |
54 | ||
55 | while (*str) { | |
56 | if (!strncmp(str, "on", 2)) | |
95a02e97 | 57 | disable_irq_remap = 0; |
736baef4 | 58 | else if (!strncmp(str, "off", 3)) |
95a02e97 | 59 | disable_irq_remap = 1; |
736baef4 JR |
60 | else if (!strncmp(str, "nosid", 5)) |
61 | disable_sourceid_checking = 1; | |
62 | else if (!strncmp(str, "no_x2apic_optout", 16)) | |
63 | no_x2apic_optout = 1; | |
64 | ||
65 | str += strcspn(str, ","); | |
66 | while (*str == ',') | |
67 | str++; | |
68 | } | |
69 | ||
70 | return 0; | |
71 | } | |
95a02e97 | 72 | early_param("intremap", setup_irqremap); |
736baef4 | 73 | |
95a02e97 | 74 | void __init setup_irq_remapping_ops(void) |
736baef4 JR |
75 | { |
76 | remap_ops = &intel_irq_remap_ops; | |
c18d2388 JR |
77 | |
78 | #ifdef CONFIG_AMD_IOMMU | |
79 | if (amd_iommu_irq_ops.prepare() == 0) | |
80 | remap_ops = &amd_iommu_irq_ops; | |
81 | #endif | |
736baef4 JR |
82 | } |
83 | ||
95a02e97 | 84 | int irq_remapping_supported(void) |
736baef4 | 85 | { |
95a02e97 | 86 | if (disable_irq_remap) |
736baef4 JR |
87 | return 0; |
88 | ||
89 | if (!remap_ops || !remap_ops->supported) | |
90 | return 0; | |
91 | ||
92 | return remap_ops->supported(); | |
93 | } | |
94 | ||
95a02e97 | 95 | int __init irq_remapping_prepare(void) |
736baef4 | 96 | { |
95a02e97 | 97 | if (!remap_ops || !remap_ops->prepare) |
736baef4 JR |
98 | return -ENODEV; |
99 | ||
95a02e97 | 100 | return remap_ops->prepare(); |
736baef4 JR |
101 | } |
102 | ||
95a02e97 | 103 | int __init irq_remapping_enable(void) |
736baef4 | 104 | { |
1c4248ca JR |
105 | int ret; |
106 | ||
95a02e97 | 107 | if (!remap_ops || !remap_ops->enable) |
736baef4 JR |
108 | return -ENODEV; |
109 | ||
1c4248ca JR |
110 | ret = remap_ops->enable(); |
111 | ||
112 | if (irq_remapping_enabled) | |
113 | irq_remapping_modify_x86_ops(); | |
114 | ||
115 | return ret; | |
736baef4 | 116 | } |
4f3d8b67 | 117 | |
95a02e97 | 118 | void irq_remapping_disable(void) |
4f3d8b67 | 119 | { |
70733e0c JR |
120 | if (!irq_remapping_enabled || |
121 | !remap_ops || | |
122 | !remap_ops->disable) | |
4f3d8b67 JR |
123 | return; |
124 | ||
95a02e97 | 125 | remap_ops->disable(); |
4f3d8b67 JR |
126 | } |
127 | ||
95a02e97 | 128 | int irq_remapping_reenable(int mode) |
4f3d8b67 | 129 | { |
70733e0c JR |
130 | if (!irq_remapping_enabled || |
131 | !remap_ops || | |
132 | !remap_ops->reenable) | |
4f3d8b67 JR |
133 | return 0; |
134 | ||
95a02e97 | 135 | return remap_ops->reenable(mode); |
4f3d8b67 JR |
136 | } |
137 | ||
95a02e97 | 138 | int __init irq_remap_enable_fault_handling(void) |
4f3d8b67 | 139 | { |
70733e0c JR |
140 | if (!irq_remapping_enabled) |
141 | return 0; | |
142 | ||
4f3d8b67 JR |
143 | if (!remap_ops || !remap_ops->enable_faulting) |
144 | return -ENODEV; | |
145 | ||
146 | return remap_ops->enable_faulting(); | |
147 | } | |
0c3f173a | 148 | |
95a02e97 SS |
149 | int setup_ioapic_remapped_entry(int irq, |
150 | struct IO_APIC_route_entry *entry, | |
151 | unsigned int destination, int vector, | |
152 | struct io_apic_irq_attr *attr) | |
0c3f173a JR |
153 | { |
154 | if (!remap_ops || !remap_ops->setup_ioapic_entry) | |
155 | return -ENODEV; | |
156 | ||
157 | return remap_ops->setup_ioapic_entry(irq, entry, destination, | |
158 | vector, attr); | |
159 | } | |
4c1bad6a | 160 | |
95a02e97 SS |
161 | int set_remapped_irq_affinity(struct irq_data *data, const struct cpumask *mask, |
162 | bool force) | |
4c1bad6a | 163 | { |
7eb9ae07 SS |
164 | if (!config_enabled(CONFIG_SMP) || !remap_ops || |
165 | !remap_ops->set_affinity) | |
4c1bad6a JR |
166 | return 0; |
167 | ||
168 | return remap_ops->set_affinity(data, mask, force); | |
169 | } | |
9d619f65 | 170 | |
95a02e97 | 171 | void free_remapped_irq(int irq) |
9d619f65 JR |
172 | { |
173 | if (!remap_ops || !remap_ops->free_irq) | |
174 | return; | |
175 | ||
176 | remap_ops->free_irq(irq); | |
177 | } | |
5e2b930b | 178 | |
95a02e97 SS |
179 | void compose_remapped_msi_msg(struct pci_dev *pdev, |
180 | unsigned int irq, unsigned int dest, | |
181 | struct msi_msg *msg, u8 hpet_id) | |
5e2b930b JR |
182 | { |
183 | if (!remap_ops || !remap_ops->compose_msi_msg) | |
184 | return; | |
185 | ||
186 | remap_ops->compose_msi_msg(pdev, irq, dest, msg, hpet_id); | |
187 | } | |
188 | ||
95a02e97 | 189 | int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec) |
5e2b930b JR |
190 | { |
191 | if (!remap_ops || !remap_ops->msi_alloc_irq) | |
192 | return -ENODEV; | |
193 | ||
194 | return remap_ops->msi_alloc_irq(pdev, irq, nvec); | |
195 | } | |
196 | ||
95a02e97 SS |
197 | int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq, |
198 | int index, int sub_handle) | |
5e2b930b JR |
199 | { |
200 | if (!remap_ops || !remap_ops->msi_setup_irq) | |
201 | return -ENODEV; | |
202 | ||
203 | return remap_ops->msi_setup_irq(pdev, irq, index, sub_handle); | |
204 | } | |
205 | ||
95a02e97 | 206 | int setup_hpet_msi_remapped(unsigned int irq, unsigned int id) |
5e2b930b JR |
207 | { |
208 | if (!remap_ops || !remap_ops->setup_hpet_msi) | |
209 | return -ENODEV; | |
210 | ||
211 | return remap_ops->setup_hpet_msi(irq, id); | |
212 | } |