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-rw-r--r--arch/x86/include/asm/irq_remapping.h118
1 files changed, 87 insertions, 31 deletions
diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h
index 47d99934580f..5fb9bbbd2f14 100644
--- a/arch/x86/include/asm/irq_remapping.h
+++ b/arch/x86/include/asm/irq_remapping.h
@@ -1,45 +1,101 @@
1#ifndef _ASM_X86_IRQ_REMAPPING_H 1/*
2#define _ASM_X86_IRQ_REMAPPING_H 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 */
3 21
4#define IRTE_DEST(dest) ((x2apic_mode) ? dest : dest << 8) 22#ifndef __X86_IRQ_REMAPPING_H
23#define __X86_IRQ_REMAPPING_H
24
25#include <asm/io_apic.h>
5 26
6#ifdef CONFIG_IRQ_REMAP 27#ifdef CONFIG_IRQ_REMAP
7static void irq_remap_modify_chip_defaults(struct irq_chip *chip); 28
8static inline void prepare_irte(struct irte *irte, int vector, 29extern int irq_remapping_enabled;
9 unsigned int dest) 30
31extern void setup_irq_remapping_ops(void);
32extern int irq_remapping_supported(void);
33extern int irq_remapping_prepare(void);
34extern int irq_remapping_enable(void);
35extern void irq_remapping_disable(void);
36extern int irq_remapping_reenable(int);
37extern int irq_remap_enable_fault_handling(void);
38extern int setup_ioapic_remapped_entry(int irq,
39 struct IO_APIC_route_entry *entry,
40 unsigned int destination,
41 int vector,
42 struct io_apic_irq_attr *attr);
43extern int set_remapped_irq_affinity(struct irq_data *data,
44 const struct cpumask *mask,
45 bool force);
46extern void free_remapped_irq(int irq);
47extern void compose_remapped_msi_msg(struct pci_dev *pdev,
48 unsigned int irq, unsigned int dest,
49 struct msi_msg *msg, u8 hpet_id);
50extern int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec);
51extern int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq,
52 int index, int sub_handle);
53extern int setup_hpet_msi_remapped(unsigned int irq, unsigned int id);
54
55#else /* CONFIG_IRQ_REMAP */
56
57#define irq_remapping_enabled 0
58
59static inline void setup_irq_remapping_ops(void) { }
60static inline int irq_remapping_supported(void) { return 0; }
61static inline int irq_remapping_prepare(void) { return -ENODEV; }
62static inline int irq_remapping_enable(void) { return -ENODEV; }
63static inline void irq_remapping_disable(void) { }
64static inline int irq_remapping_reenable(int eim) { return -ENODEV; }
65static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; }
66static inline int setup_ioapic_remapped_entry(int irq,
67 struct IO_APIC_route_entry *entry,
68 unsigned int destination,
69 int vector,
70 struct io_apic_irq_attr *attr)
71{
72 return -ENODEV;
73}
74static inline int set_remapped_irq_affinity(struct irq_data *data,
75 const struct cpumask *mask,
76 bool force)
10{ 77{
11 memset(irte, 0, sizeof(*irte)); 78 return 0;
12
13 irte->present = 1;
14 irte->dst_mode = apic->irq_dest_mode;
15 /*
16 * Trigger mode in the IRTE will always be edge, and for IO-APIC, the
17 * actual level or edge trigger will be setup in the IO-APIC
18 * RTE. This will help simplify level triggered irq migration.
19 * For more details, see the comments (in io_apic.c) explainig IO-APIC
20 * irq migration in the presence of interrupt-remapping.
21 */
22 irte->trigger_mode = 0;
23 irte->dlvry_mode = apic->irq_delivery_mode;
24 irte->vector = vector;
25 irte->dest_id = IRTE_DEST(dest);
26 irte->redir_hint = 1;
27} 79}
28static inline bool irq_remapped(struct irq_cfg *cfg) 80static inline void free_remapped_irq(int irq) { }
81static inline void compose_remapped_msi_msg(struct pci_dev *pdev,
82 unsigned int irq, unsigned int dest,
83 struct msi_msg *msg, u8 hpet_id)
29{ 84{
30 return cfg->irq_2_iommu.iommu != NULL;
31} 85}
32#else 86static inline int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec)
33static void prepare_irte(struct irte *irte, int vector, unsigned int dest)
34{ 87{
88 return -ENODEV;
35} 89}
36static inline bool irq_remapped(struct irq_cfg *cfg) 90static inline int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq,
91 int index, int sub_handle)
37{ 92{
38 return false; 93 return -ENODEV;
39} 94}
40static inline void irq_remap_modify_chip_defaults(struct irq_chip *chip) 95static inline int setup_hpet_msi_remapped(unsigned int irq, unsigned int id)
41{ 96{
97 return -ENODEV;
42} 98}
43#endif 99#endif /* CONFIG_IRQ_REMAP */
44 100
45#endif /* _ASM_X86_IRQ_REMAPPING_H */ 101#endif /* __X86_IRQ_REMAPPING_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-14 23:16:10 -0400