cregit-Linux how code gets into the kernel

Release 4.7 include/linux/dmar.h

Directory: include/linux
/*
 * 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>
#include <linux/irqreturn.h>
#include <linux/rwsem.h>
#include <linux/rcupdate.h>

struct acpi_dmar_header;

#ifdef	CONFIG_X86

# define	DMAR_UNITS_SUPPORTED	MAX_IO_APICS
#else

# define	DMAR_UNITS_SUPPORTED	64
#endif

/* DMAR Flags */

#define DMAR_INTR_REMAP		0x1

#define DMAR_X2APIC_OPT_OUT	0x2

struct intel_iommu;


struct dmar_dev_scope {
	
struct device __rcu *dev;
	
u8 bus;
	
u8 devfn;
};

#ifdef CONFIG_DMAR_TABLE
extern struct acpi_table_header *dmar_tbl;

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	dmar_dev_scope *devices;/* target device array  */
	
int	devices_cnt;		/* target device count  */
	
u16	segment;		/* PCI domain           */
	
u8	ignored:1; 		/* ignore drhd          */
	
u8	include_all:1;
	
struct intel_iommu *iommu;
};


struct dmar_pci_path {
	
u8 bus;
	
u8 device;
	
u8 function;
};


struct dmar_pci_notify_info {
	
struct pci_dev			*dev;
	
unsigned long			event;
	
int				bus;
	
u16				seg;
	
u16				level;
	
struct dmar_pci_path		path[];
}  __attribute__((packed));

extern struct rw_semaphore dmar_global_lock;
extern struct list_head dmar_drhd_units;


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


#define for_each_active_drhd_unit(drhd)					\
	list_for_each_entry_rcu(drhd, &dmar_drhd_units, list)           \
                if (drhd->ignored) {} else


#define for_each_active_iommu(i, drhd)					\
	list_for_each_entry_rcu(drhd, &dmar_drhd_units, list)           \
                if (i=drhd->iommu, drhd->ignored) {} else


#define for_each_iommu(i, drhd)						\
	list_for_each_entry_rcu(drhd, &dmar_drhd_units, list)           \
                if (i=drhd->iommu, 0) {} else 


static inline bool dmar_rcu_check(void) { return rwsem_is_locked(&dmar_global_lock) || system_state == SYSTEM_BOOTING; }

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#define dmar_rcu_dereference(p) rcu_dereference_check((p), dmar_rcu_check()) #define for_each_dev_scope(a, c, p, d) \ for ((p) = 0; ((d) = (p) < (c) ? dmar_rcu_dereference((a)[(p)].dev) : \ NULL, (p) < (c)); (p)++) #define for_each_active_dev_scope(a, c, p, d) \ for_each_dev_scope((a), (c), (p), (d)) if (!(d)) { continue; } else extern int dmar_table_init(void); extern int dmar_dev_scope_init(void); extern int dmar_parse_dev_scope(void *start, void *end, int *cnt, struct dmar_dev_scope **devices, u16 segment); extern void *dmar_alloc_dev_scope(void *start, void *end, int *cnt); extern void dmar_free_dev_scope(struct dmar_dev_scope **devices, int *cnt); extern int dmar_insert_dev_scope(struct dmar_pci_notify_info *info, void *start, void*end, u16 segment, struct dmar_dev_scope *devices, int devices_cnt); extern int dmar_remove_dev_scope(struct dmar_pci_notify_info *info, u16 segment, struct dmar_dev_scope *devices, int count); /* Intel IOMMU detection */ extern int detect_intel_iommu(void); extern int enable_drhd_fault_handling(void); extern int dmar_device_add(acpi_handle handle); extern int dmar_device_remove(acpi_handle handle);
static inline int dmar_res_noop(struct acpi_dmar_header *hdr, void *arg) { return 0; }

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#ifdef CONFIG_INTEL_IOMMU extern int iommu_detected, no_iommu; extern int intel_iommu_init(void); extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg); extern int dmar_parse_one_atsr(struct acpi_dmar_header *header, void *arg); extern int dmar_check_one_atsr(struct acpi_dmar_header *hdr, void *arg); extern int dmar_release_one_atsr(struct acpi_dmar_header *hdr, void *arg); extern int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert); extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info); #else /* !CONFIG_INTEL_IOMMU: */
static inline int intel_iommu_init(void) { return -ENODEV; }

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#define dmar_parse_one_rmrr dmar_res_noop #define dmar_parse_one_atsr dmar_res_noop #define dmar_check_one_atsr dmar_res_noop #define dmar_release_one_atsr dmar_res_noop
static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info) { return 0; }

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static inline int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert) { return 0; }

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#endif /* CONFIG_INTEL_IOMMU */ #ifdef CONFIG_IRQ_REMAP extern int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert); #else /* CONFIG_IRQ_REMAP */
static inline int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert) { return 0; }

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#endif /* CONFIG_IRQ_REMAP */ #else /* CONFIG_DMAR_TABLE */
static inline int dmar_device_add(void *handle) { return 0; }

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static inline int dmar_device_remove(void *handle) { return 0; }

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#endif /* CONFIG_DMAR_TABLE */ struct irte { union { /* Shared between remapped and posted mode*/ struct { __u64 present : 1, /* 0 */ fpd : 1, /* 1 */ __res0 : 6, /* 2 - 6 */ avail : 4, /* 8 - 11 */ __res1 : 3, /* 12 - 14 */ pst : 1, /* 15 */ vector : 8, /* 16 - 23 */ __res2 : 40; /* 24 - 63 */ }; /* Remapped mode */ struct { __u64 r_present : 1, /* 0 */ r_fpd : 1, /* 1 */ dst_mode : 1, /* 2 */ redir_hint : 1, /* 3 */ trigger_mode : 1, /* 4 */ dlvry_mode : 3, /* 5 - 7 */ r_avail : 4, /* 8 - 11 */ r_res0 : 4, /* 12 - 15 */ r_vector : 8, /* 16 - 23 */ r_res1 : 8, /* 24 - 31 */ dest_id : 32; /* 32 - 63 */ }; /* Posted mode */ struct { __u64 p_present : 1, /* 0 */ p_fpd : 1, /* 1 */ p_res0 : 6, /* 2 - 7 */ p_avail : 4, /* 8 - 11 */ p_res1 : 2, /* 12 - 13 */ p_urgent : 1, /* 14 */ p_pst : 1, /* 15 */ p_vector : 8, /* 16 - 23 */ p_res2 : 14, /* 24 - 37 */ pda_l : 26; /* 38 - 63 */ }; __u64 low; }; union { /* Shared between remapped and posted mode*/ struct { __u64 sid : 16, /* 64 - 79 */ sq : 2, /* 80 - 81 */ svt : 2, /* 82 - 83 */ __res3 : 44; /* 84 - 127 */ }; /* Posted mode*/ struct { __u64 p_sid : 16, /* 64 - 79 */ p_sq : 2, /* 80 - 81 */ p_svt : 2, /* 82 - 83 */ p_res3 : 12, /* 84 - 95 */ pda_h : 32; /* 96 - 127 */ }; __u64 high; }; };
static inline void dmar_copy_shared_irte(struct irte *dst, struct irte *src) { dst->present = src->present; dst->fpd = src->fpd; dst->avail = src->avail; dst->pst = src->pst; dst->vector = src->vector; dst->sid = src->sid; dst->sq = src->sq; dst->svt = src->svt; }

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#define PDA_LOW_BIT 26 #define PDA_HIGH_BIT 32 enum { IRQ_REMAP_XAPIC_MODE, IRQ_REMAP_X2APIC_MODE, }; /* Can't use the common MSI interrupt functions * since DMAR is not a pci device */ struct irq_data; extern void dmar_msi_unmask(struct irq_data *data); extern void dmar_msi_mask(struct irq_data *data); 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 irqreturn_t dmar_fault(int irq, void *dev_id); extern int dmar_alloc_hwirq(int id, int node, void *arg); extern void dmar_free_hwirq(int irq); #endif /* __DMAR_H__ */

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Directory: include/linux
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