LXR linux/arch/x86/include/asm/irq

   1/*
   2 * Copyright (C) 2012 Advanced Micro Devices, Inc.
   3 * Author: Joerg Roedel <joerg.roedel@amd.com>
   4 *
   5 * This program is free software; you can redistribute it and/or modify it
   6 * under the terms of the GNU General Public License version 2 as published
   7 * by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, write to the Free Software
  16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  17 *
  18 * This header file contains the interface of the interrupt remapping code to
  19 * the x86 interrupt management code.
  20 */
  21
  22#ifndef __X86_IRQ_REMAPPING_H
  23#define __X86_IRQ_REMAPPING_H
  24
  25#include <asm/irqdomain.h>
  26#include <asm/hw_irq.h>
  27#include <asm/io_apic.h>
  28
  29struct msi_msg;
  30struct irq_alloc_info;
  31
  32enum irq_remap_cap {
  33        IRQ_POSTING_CAP = 0,
  34};
  35
  36struct vcpu_data {
  37        u64 pi_desc_addr;       /* Physical address of PI Descriptor */
  38        u32 vector;             /* Guest vector of the interrupt */
  39};
  40
  41#ifdef CONFIG_IRQ_REMAP
  42
  43extern bool irq_remapping_cap(enum irq_remap_cap cap);
  44extern void set_irq_remapping_broken(void);
  45extern int irq_remapping_prepare(void);
  46extern int irq_remapping_enable(void);
  47extern void irq_remapping_disable(void);
  48extern int irq_remapping_reenable(int);
  49extern int irq_remap_enable_fault_handling(void);
  50extern void panic_if_irq_remap(const char *msg);
  51
  52extern struct irq_domain *
  53irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info);
  54extern struct irq_domain *
  55irq_remapping_get_irq_domain(struct irq_alloc_info *info);
  56
  57/* Create PCI MSI/MSIx irqdomain, use @parent as the parent irqdomain. */
  58extern struct irq_domain *arch_create_msi_irq_domain(struct irq_domain *parent);
  59
  60/* Get parent irqdomain for interrupt remapping irqdomain */
  61static inline struct irq_domain *arch_get_ir_parent_domain(void)
  62{
  63        return x86_vector_domain;
  64}
  65
  66#else  /* CONFIG_IRQ_REMAP */
  67
  68static inline bool irq_remapping_cap(enum irq_remap_cap cap) { return 0; }
  69static inline void set_irq_remapping_broken(void) { }
  70static inline int irq_remapping_prepare(void) { return -ENODEV; }
  71static inline int irq_remapping_enable(void) { return -ENODEV; }
  72static inline void irq_remapping_disable(void) { }
  73static inline int irq_remapping_reenable(int eim) { return -ENODEV; }
  74static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; }
  75
  76static inline void panic_if_irq_remap(const char *msg)
  77{
  78}
  79
  80static inline struct irq_domain *
  81irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info)
  82{
  83        return NULL;
  84}
  85
  86static inline struct irq_domain *
  87irq_remapping_get_irq_domain(struct irq_alloc_info *info)
  88{
  89        return NULL;
  90}
  91
  92#endif /* CONFIG_IRQ_REMAP */
  93#endif /* __X86_IRQ_REMAPPING_H */
  94