include/linux/dmar.h - linux-imx - Git at Google

 /*
  * 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;
 }

 #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;
 }

 #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; }

 #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;
 }

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

 #else /* CONFIG_DMAR_TABLE */

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

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

 #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;
 }

 #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__ */
	/*
	* 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;
	}

	#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, voidend, 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;
	}

	#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; }

	#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;
	}

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

	#else /* CONFIG_DMAR_TABLE */

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

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

	#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;
	}

	#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__ */