root/include/linux/dmar.h

INCLUDED FROM

DEFINITIONS

1. detect_intel_iommu
2. dmar_table_init
3. intel_iommu_init

/*
 * Copyright (c) 2006, Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307 USA.
 *
 * Copyright (C) Ashok Raj <ashok.raj@intel.com>
 * Copyright (C) Shaohua Li <shaohua.li@intel.com>
 */

#ifndef __DMAR_H__
#define __DMAR_H__

#include <linux/acpi.h>
#include <linux/types.h>
#include <linux/msi.h>

#if defined(CONFIG_DMAR) || defined(CONFIG_INTR_REMAP)
struct intel_iommu;

struct dmar_drhd_unit {
        struct list_head list;          /* list of drhd units   */
        struct  acpi_dmar_header *hdr;  /* ACPI header          */
        u64     reg_base_addr;          /* register base address*/
        struct  pci_dev **devices;      /* target device array  */
        int     devices_cnt;            /* target device count  */
        u8      ignored:1;              /* ignore drhd          */
        u8      include_all:1;
        struct intel_iommu *iommu;
};

extern struct list_head dmar_drhd_units;

#define for_each_drhd_unit(drhd) \
        list_for_each_entry(drhd, &dmar_drhd_units, list)

extern int dmar_table_init(void);
extern int early_dmar_detect(void);
extern int dmar_dev_scope_init(void);

/* Intel IOMMU detection */
extern void detect_intel_iommu(void);


extern int parse_ioapics_under_ir(void);
extern int alloc_iommu(struct dmar_drhd_unit *);
#else
static inline void detect_intel_iommu(void)
{
        return;
}

static inline int dmar_table_init(void)
{
        return -ENODEV;
}
#endif /* !CONFIG_DMAR && !CONFIG_INTR_REMAP */

#ifdef CONFIG_INTR_REMAP
extern int intr_remapping_enabled;
extern int enable_intr_remapping(int);

struct irte {
        union {
                struct {
                        __u64   present         : 1,
                                fpd             : 1,
                                dst_mode        : 1,
                                redir_hint      : 1,
                                trigger_mode    : 1,
                                dlvry_mode      : 3,
                                avail           : 4,
                                __reserved_1    : 4,
                                vector          : 8,
                                __reserved_2    : 8,
                                dest_id         : 32;
                };
                __u64 low;
        };

        union {
                struct {
                        __u64   sid             : 16,
                                sq              : 2,
                                svt             : 2,
                                __reserved_3    : 44;
                };
                __u64 high;
        };
};
extern int get_irte(int irq, struct irte *entry);
extern int modify_irte(int irq, struct irte *irte_modified);
extern int alloc_irte(struct intel_iommu *iommu, int irq, u16 count);
extern int set_irte_irq(int irq, struct intel_iommu *iommu, u16 index,
                        u16 sub_handle);
extern int map_irq_to_irte_handle(int irq, u16 *sub_handle);
extern int clear_irte_irq(int irq, struct intel_iommu *iommu, u16 index);
extern int flush_irte(int irq);
extern int free_irte(int irq);

extern int irq_remapped(int irq);
extern struct intel_iommu *map_dev_to_ir(struct pci_dev *dev);
extern struct intel_iommu *map_ioapic_to_ir(int apic);
#else
#define irq_remapped(irq)               (0)
#define enable_intr_remapping(mode)     (-1)
#define intr_remapping_enabled          (0)
#endif

#ifdef CONFIG_DMAR
extern const char *dmar_get_fault_reason(u8 fault_reason);

/* Can't use the common MSI interrupt functions
 * since DMAR is not a pci device
 */
extern void dmar_msi_unmask(unsigned int irq);
extern void dmar_msi_mask(unsigned int irq);
extern void dmar_msi_read(int irq, struct msi_msg *msg);
extern void dmar_msi_write(int irq, struct msi_msg *msg);
extern int dmar_set_interrupt(struct intel_iommu *iommu);
extern int arch_setup_dmar_msi(unsigned int irq);

extern int iommu_detected, no_iommu;
extern struct list_head dmar_rmrr_units;
struct dmar_rmrr_unit {
        struct list_head list;          /* list of rmrr units   */
        struct acpi_dmar_header *hdr;   /* ACPI header          */
        u64     base_address;           /* reserved base address*/
        u64     end_address;            /* reserved end address */
        struct pci_dev **devices;       /* target devices */
        int     devices_cnt;            /* target device count */
};

#define for_each_rmrr_units(rmrr) \
        list_for_each_entry(rmrr, &dmar_rmrr_units, list)
/* Intel DMAR  initialization functions */
extern int intel_iommu_init(void);
extern int dmar_disabled;
#else
static inline int intel_iommu_init(void)
{
#ifdef CONFIG_INTR_REMAP
        return dmar_dev_scope_init();
#else
        return -ENODEV;
#endif
}
#endif /* !CONFIG_DMAR */
#endif /* __DMAR_H__ */