1#include <linux/kernel.h>
  2#include <linux/string.h>
  3#include <linux/errno.h>
  4
  5#include "irq_remapping.h"
  6
  7int irq_remapping_enabled;
  8
  9int disable_irq_remap;
 10int disable_sourceid_checking;
 11int no_x2apic_optout;
 12
 13static struct irq_remap_ops *remap_ops;
 14
 15static __init int setup_nointremap(char *str)
 16{
 17	disable_irq_remap = 1;
 18	return 0;
 19}
 20early_param("nointremap", setup_nointremap);
 21
 22static __init int setup_irqremap(char *str)
 23{
 24	if (!str)
 25		return -EINVAL;
 26
 27	while (*str) {
 28		if (!strncmp(str, "on", 2))
 29			disable_irq_remap = 0;
 30		else if (!strncmp(str, "off", 3))
 31			disable_irq_remap = 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}
 44early_param("intremap", setup_irqremap);
 45
 46void __init setup_irq_remapping_ops(void)
 47{
 48	remap_ops = &intel_irq_remap_ops;
 49}
 50
 51int irq_remapping_supported(void)
 52{
 53	if (disable_irq_remap)
 54		return 0;
 55
 56	if (!remap_ops || !remap_ops->supported)
 57		return 0;
 58
 59	return remap_ops->supported();
 60}
 61
 62int __init irq_remapping_prepare(void)
 63{
 64	if (!remap_ops || !remap_ops->prepare)
 65		return -ENODEV;
 66
 67	return remap_ops->prepare();
 68}
 69
 70int __init irq_remapping_enable(void)
 71{
 72	if (!remap_ops || !remap_ops->enable)
 73		return -ENODEV;
 74
 75	return remap_ops->enable();
 76}
 77
 78void irq_remapping_disable(void)
 79{
 80	if (!remap_ops || !remap_ops->disable)
 81		return;
 82
 83	remap_ops->disable();
 84}
 85
 86int irq_remapping_reenable(int mode)
 87{
 88	if (!remap_ops || !remap_ops->reenable)
 89		return 0;
 90
 91	return remap_ops->reenable(mode);
 92}
 93
 94int __init irq_remap_enable_fault_handling(void)
 95{
 96	if (!remap_ops || !remap_ops->enable_faulting)
 97		return -ENODEV;
 98
 99	return remap_ops->enable_faulting();
100}
101
102int setup_ioapic_remapped_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}
113
114#ifdef CONFIG_SMP
115int set_remapped_irq_affinity(struct irq_data *data, const struct cpumask *mask,
116			      bool force)
117{
118	if (!remap_ops || !remap_ops->set_affinity)
119		return 0;
120
121	return remap_ops->set_affinity(data, mask, force);
122}
123#endif
124
125void free_remapped_irq(int irq)
126{
127	if (!remap_ops || !remap_ops->free_irq)
128		return;
129
130	remap_ops->free_irq(irq);
131}
132
133void compose_remapped_msi_msg(struct pci_dev *pdev,
134			      unsigned int irq, unsigned int dest,
135			      struct msi_msg *msg, u8 hpet_id)
136{
137	if (!remap_ops || !remap_ops->compose_msi_msg)
138		return;
139
140	remap_ops->compose_msi_msg(pdev, irq, dest, msg, hpet_id);
141}
142
143int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec)
144{
145	if (!remap_ops || !remap_ops->msi_alloc_irq)
146		return -ENODEV;
147
148	return remap_ops->msi_alloc_irq(pdev, irq, nvec);
149}
150
151int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq,
152			   int index, int sub_handle)
153{
154	if (!remap_ops || !remap_ops->msi_setup_irq)
155		return -ENODEV;
156
157	return remap_ops->msi_setup_irq(pdev, irq, index, sub_handle);
158}
159
160int setup_hpet_msi_remapped(unsigned int irq, unsigned int id)
161{
162	if (!remap_ops || !remap_ops->setup_hpet_msi)
163		return -ENODEV;
164
165	return remap_ops->setup_hpet_msi(irq, id);
166}