290 lines
7.9 KiB
C
290 lines
7.9 KiB
C
/*
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* Copyright (c) 2006, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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* Copyright (C) Ashok Raj <ashok.raj@intel.com>
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* Copyright (C) Shaohua Li <shaohua.li@intel.com>
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*/
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#ifndef __DMAR_H__
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#define __DMAR_H__
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#include <linux/acpi.h>
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#include <linux/types.h>
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#include <linux/msi.h>
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#include <linux/irqreturn.h>
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#include <linux/rwsem.h>
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#include <linux/rculist.h>
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struct acpi_dmar_header;
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#ifdef CONFIG_X86
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# define DMAR_UNITS_SUPPORTED MAX_IO_APICS
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#else
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# define DMAR_UNITS_SUPPORTED 64
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#endif
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/* DMAR Flags */
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#define DMAR_INTR_REMAP 0x1
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#define DMAR_X2APIC_OPT_OUT 0x2
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#define DMAR_PLATFORM_OPT_IN 0x4
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struct intel_iommu;
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struct dmar_dev_scope {
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struct device __rcu *dev;
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u8 bus;
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u8 devfn;
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};
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#ifdef CONFIG_DMAR_TABLE
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extern struct acpi_table_header *dmar_tbl;
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struct dmar_drhd_unit {
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struct list_head list; /* list of drhd units */
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struct acpi_dmar_header *hdr; /* ACPI header */
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u64 reg_base_addr; /* register base address*/
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struct dmar_dev_scope *devices;/* target device array */
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int devices_cnt; /* target device count */
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u16 segment; /* PCI domain */
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u8 ignored:1; /* ignore drhd */
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u8 include_all:1;
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struct intel_iommu *iommu;
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};
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struct dmar_pci_path {
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u8 bus;
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u8 device;
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u8 function;
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};
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struct dmar_pci_notify_info {
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struct pci_dev *dev;
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unsigned long event;
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int bus;
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u16 seg;
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u16 level;
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struct dmar_pci_path path[];
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} __attribute__((packed));
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extern struct rw_semaphore dmar_global_lock;
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extern struct list_head dmar_drhd_units;
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#define for_each_drhd_unit(drhd) \
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list_for_each_entry_rcu(drhd, &dmar_drhd_units, list)
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#define for_each_active_drhd_unit(drhd) \
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list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
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if (drhd->ignored) {} else
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#define for_each_active_iommu(i, drhd) \
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list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
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if (i=drhd->iommu, drhd->ignored) {} else
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#define for_each_iommu(i, drhd) \
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list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
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if (i=drhd->iommu, 0) {} else
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static inline bool dmar_rcu_check(void)
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{
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return rwsem_is_locked(&dmar_global_lock) ||
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system_state == SYSTEM_BOOTING;
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}
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#define dmar_rcu_dereference(p) rcu_dereference_check((p), dmar_rcu_check())
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#define for_each_dev_scope(a, c, p, d) \
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for ((p) = 0; ((d) = (p) < (c) ? dmar_rcu_dereference((a)[(p)].dev) : \
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NULL, (p) < (c)); (p)++)
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#define for_each_active_dev_scope(a, c, p, d) \
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for_each_dev_scope((a), (c), (p), (d)) if (!(d)) { continue; } else
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extern int dmar_table_init(void);
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extern int dmar_dev_scope_init(void);
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extern void dmar_register_bus_notifier(void);
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extern int dmar_parse_dev_scope(void *start, void *end, int *cnt,
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struct dmar_dev_scope **devices, u16 segment);
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extern void *dmar_alloc_dev_scope(void *start, void *end, int *cnt);
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extern void dmar_free_dev_scope(struct dmar_dev_scope **devices, int *cnt);
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extern int dmar_insert_dev_scope(struct dmar_pci_notify_info *info,
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void *start, void*end, u16 segment,
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struct dmar_dev_scope *devices,
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int devices_cnt);
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extern int dmar_remove_dev_scope(struct dmar_pci_notify_info *info,
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u16 segment, struct dmar_dev_scope *devices,
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int count);
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/* Intel IOMMU detection */
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extern int detect_intel_iommu(void);
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extern int enable_drhd_fault_handling(void);
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extern int dmar_device_add(acpi_handle handle);
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extern int dmar_device_remove(acpi_handle handle);
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static inline int dmar_res_noop(struct acpi_dmar_header *hdr, void *arg)
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{
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return 0;
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}
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#ifdef CONFIG_INTEL_IOMMU
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extern int iommu_detected, no_iommu;
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extern int intel_iommu_init(void);
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extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg);
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extern int dmar_parse_one_atsr(struct acpi_dmar_header *header, void *arg);
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extern int dmar_check_one_atsr(struct acpi_dmar_header *hdr, void *arg);
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extern int dmar_release_one_atsr(struct acpi_dmar_header *hdr, void *arg);
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extern int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert);
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extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info);
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#else /* !CONFIG_INTEL_IOMMU: */
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static inline int intel_iommu_init(void) { return -ENODEV; }
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#define dmar_parse_one_rmrr dmar_res_noop
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#define dmar_parse_one_atsr dmar_res_noop
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#define dmar_check_one_atsr dmar_res_noop
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#define dmar_release_one_atsr dmar_res_noop
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static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
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{
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return 0;
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}
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static inline int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert)
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{
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return 0;
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}
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#endif /* CONFIG_INTEL_IOMMU */
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#ifdef CONFIG_IRQ_REMAP
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extern int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert);
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#else /* CONFIG_IRQ_REMAP */
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static inline int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert)
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{ return 0; }
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#endif /* CONFIG_IRQ_REMAP */
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extern bool dmar_platform_optin(void);
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#else /* CONFIG_DMAR_TABLE */
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static inline int dmar_device_add(void *handle)
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{
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return 0;
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}
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static inline int dmar_device_remove(void *handle)
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{
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return 0;
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}
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static inline bool dmar_platform_optin(void)
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{
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return false;
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}
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#endif /* CONFIG_DMAR_TABLE */
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struct irte {
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union {
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/* Shared between remapped and posted mode*/
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struct {
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__u64 present : 1, /* 0 */
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fpd : 1, /* 1 */
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__res0 : 6, /* 2 - 6 */
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avail : 4, /* 8 - 11 */
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__res1 : 3, /* 12 - 14 */
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pst : 1, /* 15 */
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vector : 8, /* 16 - 23 */
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__res2 : 40; /* 24 - 63 */
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};
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/* Remapped mode */
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struct {
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__u64 r_present : 1, /* 0 */
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r_fpd : 1, /* 1 */
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dst_mode : 1, /* 2 */
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redir_hint : 1, /* 3 */
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trigger_mode : 1, /* 4 */
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dlvry_mode : 3, /* 5 - 7 */
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r_avail : 4, /* 8 - 11 */
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r_res0 : 4, /* 12 - 15 */
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r_vector : 8, /* 16 - 23 */
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r_res1 : 8, /* 24 - 31 */
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dest_id : 32; /* 32 - 63 */
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};
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/* Posted mode */
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struct {
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__u64 p_present : 1, /* 0 */
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p_fpd : 1, /* 1 */
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p_res0 : 6, /* 2 - 7 */
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p_avail : 4, /* 8 - 11 */
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p_res1 : 2, /* 12 - 13 */
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p_urgent : 1, /* 14 */
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p_pst : 1, /* 15 */
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p_vector : 8, /* 16 - 23 */
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p_res2 : 14, /* 24 - 37 */
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pda_l : 26; /* 38 - 63 */
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};
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__u64 low;
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};
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union {
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/* Shared between remapped and posted mode*/
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struct {
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__u64 sid : 16, /* 64 - 79 */
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sq : 2, /* 80 - 81 */
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svt : 2, /* 82 - 83 */
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__res3 : 44; /* 84 - 127 */
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};
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/* Posted mode*/
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struct {
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__u64 p_sid : 16, /* 64 - 79 */
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p_sq : 2, /* 80 - 81 */
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p_svt : 2, /* 82 - 83 */
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p_res3 : 12, /* 84 - 95 */
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pda_h : 32; /* 96 - 127 */
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};
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__u64 high;
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};
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};
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static inline void dmar_copy_shared_irte(struct irte *dst, struct irte *src)
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{
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dst->present = src->present;
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dst->fpd = src->fpd;
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dst->avail = src->avail;
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dst->pst = src->pst;
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dst->vector = src->vector;
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dst->sid = src->sid;
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dst->sq = src->sq;
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dst->svt = src->svt;
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}
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#define PDA_LOW_BIT 26
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#define PDA_HIGH_BIT 32
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/* Can't use the common MSI interrupt functions
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* since DMAR is not a pci device
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*/
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struct irq_data;
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extern void dmar_msi_unmask(struct irq_data *data);
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extern void dmar_msi_mask(struct irq_data *data);
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extern void dmar_msi_read(int irq, struct msi_msg *msg);
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extern void dmar_msi_write(int irq, struct msi_msg *msg);
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extern int dmar_set_interrupt(struct intel_iommu *iommu);
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extern irqreturn_t dmar_fault(int irq, void *dev_id);
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extern int dmar_alloc_hwirq(int id, int node, void *arg);
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extern void dmar_free_hwirq(int irq);
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#endif /* __DMAR_H__ */
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