[mirror_ubuntu-artful-kernel.git] / include / linux / 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, 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);

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_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
static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
{
	return 0;
}
#endif /* CONFIG_INTEL_IOMMU */

#endif /* CONFIG_DMAR_TABLE */

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;
	};
};

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 arch_setup_dmar_msi(unsigned int irq);

#endif /* __DMAR_H__ */
Commit	Line	Data
10e5247f KA	1	/*
	2	* Copyright (c) 2006, Intel Corporation.
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms and conditions of the GNU General Public License,
	6	* version 2, as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope it will be useful, but WITHOUT
	9	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	10	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	11	* more details.
	12	*
	13	* You should have received a copy of the GNU General Public License along with
	14	* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
	15	* Place - Suite 330, Boston, MA 02111-1307 USA.
	16	*
	17	* Copyright (C) Ashok Raj <ashok.raj@intel.com>
	18	* Copyright (C) Shaohua Li <shaohua.li@intel.com>
	19	*/
	20
	21	#ifndef __DMAR_H__
	22	#define __DMAR_H__
	23
	24	#include <linux/acpi.h>
	25	#include <linux/types.h>
ba395927	26	#include <linux/msi.h>
1531a6a6	27	#include <linux/irqreturn.h>
3a5670e8	28	#include <linux/rwsem.h>
0e242612	29	#include <linux/rcupdate.h>
10e5247f	30
6eea69dd AM	31	struct acpi_dmar_header;
6eea69dd AM	32
78d8e704 JL	33	#ifdef CONFIG_X86
	34	# define DMAR_UNITS_SUPPORTED MAX_IO_APICS
	35	#else
	36	# define DMAR_UNITS_SUPPORTED 64
	37	#endif
	38
41750d31 SS	39	/* DMAR Flags */
	40	#define DMAR_INTR_REMAP 0x1
	41	#define DMAR_X2APIC_OPT_OUT 0x2
	42
ba395927	43	struct intel_iommu;
694835dc	44
832bd858 DW	45	struct dmar_dev_scope {
	46	struct device __rcu *dev;
	47	u8 bus;
	48	u8 devfn;
	49	};
	50
d3f13810	51	#ifdef CONFIG_DMAR_TABLE
41750d31	52	extern struct acpi_table_header *dmar_tbl;
2ae21010 SS	53	struct dmar_drhd_unit {
	54	struct list_head list; /* list of drhd units */
	55	struct acpi_dmar_header hdr; / ACPI header */
	56	u64 reg_base_addr; /* register base address*/
832bd858	57	struct dmar_dev_scope devices;/ target device array */
2ae21010	58	int devices_cnt; /* target device count */
276dbf99	59	u16 segment; /* PCI domain */
2ae21010 SS	60	u8 ignored:1; /* ignore drhd */
	61	u8 include_all:1;
	62	struct intel_iommu *iommu;
	63	};
	64
57384592 JR	65	struct dmar_pci_path {
	66	u8 bus;
	67	u8 device;
	68	u8 function;
	69	};
	70
59ce0515 JL	71	struct dmar_pci_notify_info {
	72	struct pci_dev *dev;
	73	unsigned long event;
	74	int bus;
	75	u16 seg;
	76	u16 level;
57384592	77	struct dmar_pci_path path[];
59ce0515 JL	78	} __attribute__((packed));
59ce0515 JL	79
3a5670e8	80	extern struct rw_semaphore dmar_global_lock;
2ae21010 SS	81	extern struct list_head dmar_drhd_units;
	82
	83	#define for_each_drhd_unit(drhd) \
0e242612	84	list_for_each_entry_rcu(drhd, &dmar_drhd_units, list)
2ae21010	85
7c919779	86	#define for_each_active_drhd_unit(drhd) \
0e242612	87	list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
7c919779 JL	88	if (drhd->ignored) {} else
7c919779 JL	89
8f912ba4	90	#define for_each_active_iommu(i, drhd) \
0e242612	91	list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
8f912ba4 DW	92	if (i=drhd->iommu, drhd->ignored) {} else
	93
	94	#define for_each_iommu(i, drhd) \
0e242612	95	list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
8f912ba4 DW	96	if (i=drhd->iommu, 0) {} else
8f912ba4 DW	97
0e242612 JL	98	static inline bool dmar_rcu_check(void)
	99	{
	100	return rwsem_is_locked(&dmar_global_lock) \|\|
	101	system_state == SYSTEM_BOOTING;
	102	}
	103
	104	#define dmar_rcu_dereference(p) rcu_dereference_check((p), dmar_rcu_check())
	105
b683b230	106	#define for_each_dev_scope(a, c, p, d) \
832bd858	107	for ((p) = 0; ((d) = (p) < (c) ? dmar_rcu_dereference((a)[(p)].dev) : \
0e242612	108	NULL, (p) < (c)); (p)++)
b683b230 JL	109
	110	#define for_each_active_dev_scope(a, c, p, d) \
	111	for_each_dev_scope((a), (c), (p), (d)) if (!(d)) { continue; } else
	112
2ae21010	113	extern int dmar_table_init(void);
2ae21010	114	extern int dmar_dev_scope_init(void);
ada4d4b2	115	extern int dmar_parse_dev_scope(void start, void end, int *cnt,
832bd858	116	struct dmar_dev_scope **devices, u16 segment);
bb3a6b78	117	extern void dmar_alloc_dev_scope(void start, void end, int cnt);
832bd858	118	extern void dmar_free_dev_scope(struct dmar_dev_scope *devices, int cnt);
59ce0515 JL	119	extern int dmar_insert_dev_scope(struct dmar_pci_notify_info *info,
59ce0515 JL	120	void start, voidend, u16 segment,
832bd858	121	struct dmar_dev_scope *devices,
59ce0515 JL	122	int devices_cnt);
59ce0515 JL	123	extern int dmar_remove_dev_scope(struct dmar_pci_notify_info *info,
832bd858	124	u16 segment, struct dmar_dev_scope *devices,
59ce0515	125	int count);
2ae21010	126	/* Intel IOMMU detection */
480125ba	127	extern int detect_intel_iommu(void);
9d783ba0	128	extern int enable_drhd_fault_handling(void);
8594d832	129
c2a0b538 JL	130	static inline int dmar_res_noop(struct acpi_dmar_header hdr, void arg)
	131	{
	132	return 0;
	133	}
	134
8594d832 JL	135	#ifdef CONFIG_INTEL_IOMMU
	136	extern int iommu_detected, no_iommu;
	137	extern int intel_iommu_init(void);
c2a0b538 JL	138	extern int dmar_parse_one_rmrr(struct acpi_dmar_header header, void arg);
c2a0b538 JL	139	extern int dmar_parse_one_atsr(struct acpi_dmar_header header, void arg);
8594d832 JL	140	extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info);
	141	#else /* !CONFIG_INTEL_IOMMU: */
	142	static inline int intel_iommu_init(void) { return -ENODEV; }
c2a0b538 JL	143	#define dmar_parse_one_rmrr dmar_res_noop
c2a0b538 JL	144	#define dmar_parse_one_atsr dmar_res_noop
8594d832	145	static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
29b61be6	146	{
8594d832	147	return 0;
29b61be6	148	}
8594d832 JL	149	#endif /* CONFIG_INTEL_IOMMU */
	150
	151	#endif /* CONFIG_DMAR_TABLE */
2ae21010	152
2ae21010 SS	153	struct irte {
	154	union {
	155	struct {
	156	__u64 present : 1,
	157	fpd : 1,
	158	dst_mode : 1,
	159	redir_hint : 1,
	160	trigger_mode : 1,
	161	dlvry_mode : 3,
	162	avail : 4,
	163	__reserved_1 : 4,
	164	vector : 8,
	165	__reserved_2 : 8,
	166	dest_id : 32;
	167	};
	168	__u64 low;
	169	};
	170
	171	union {
	172	struct {
	173	__u64 sid : 16,
	174	sq : 2,
	175	svt : 2,
	176	__reserved_3 : 44;
	177	};
	178	__u64 high;
	179	};
	180	};
423f0859	181
41750d31 SS	182	enum {
	183	IRQ_REMAP_XAPIC_MODE,
	184	IRQ_REMAP_X2APIC_MODE,
	185	};
	186
3460a6d9 KA	187	/* Can't use the common MSI interrupt functions
	188	* since DMAR is not a pci device
	189	*/
5c2837fb TG	190	struct irq_data;
	191	extern void dmar_msi_unmask(struct irq_data *data);
	192	extern void dmar_msi_mask(struct irq_data *data);
3460a6d9 KA	193	extern void dmar_msi_read(int irq, struct msi_msg *msg);
	194	extern void dmar_msi_write(int irq, struct msi_msg *msg);
	195	extern int dmar_set_interrupt(struct intel_iommu *iommu);
1531a6a6	196	extern irqreturn_t dmar_fault(int irq, void *dev_id);
3460a6d9 KA	197	extern int arch_setup_dmar_msi(unsigned int irq);
3460a6d9 KA	198
10e5247f	199	#endif /* __DMAR_H__ */