linux/include/linux/dmar.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (c) 2006, Intel Corporation.
 *
 * Copyright (C) Ashok Raj <[email protected]>
 * Copyright (C) Shaohua Li <[email protected]>
 */

#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/rculist.h>

struct acpi_dmar_header;

#define DMAR_UNITS_SUPPORTED …

/* DMAR Flags */
#define DMAR_INTR_REMAP …
#define DMAR_X2APIC_OPT_OUT …
#define DMAR_PLATFORM_OPT_IN …

struct intel_iommu;

struct dmar_dev_scope { … };

#ifdef CONFIG_DMAR_TABLE
extern struct acpi_table_header *dmar_tbl;
struct dmar_drhd_unit { … };

struct dmar_pci_path { … };

struct dmar_pci_notify_info { … }  __attribute__((packed));

extern struct rw_semaphore dmar_global_lock;
extern struct list_head dmar_drhd_units;

#define for_each_drhd_unit(drhd) …

#define for_each_active_drhd_unit(drhd) …

#define for_each_active_iommu(i, drhd) …

#define for_each_iommu(i, drhd) … 

static inline bool dmar_rcu_check(void)
{ … }

#define dmar_rcu_dereference(p) …

#define for_each_dev_scope(devs, cnt, i, tmp) …

#define for_each_active_dev_scope(devs, cnt, i, tmp) …

extern int dmar_table_init(void);
extern int dmar_dev_scope_init(void);
extern void dmar_register_bus_notifier(void);
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 */
void detect_intel_iommu(void);
extern int enable_drhd_fault_handling(unsigned int cpu);
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)
{ … }

#ifdef CONFIG_DMAR_DEBUG
void dmar_fault_dump_ptes(struct intel_iommu *iommu, u16 source_id,
			  unsigned long long addr, u32 pasid);
#else
static inline void dmar_fault_dump_ptes(struct intel_iommu *iommu, u16 source_id,
					unsigned long long addr, u32 pasid) {}
#endif

#ifdef CONFIG_INTEL_IOMMU
extern int iommu_detected, no_iommu;
extern int intel_iommu_init(void);
extern void intel_iommu_shutdown(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_parse_one_satc(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; }
static inline void intel_iommu_shutdown(void) { }

#define dmar_parse_one_rmrr …
#define dmar_parse_one_atsr …
#define dmar_check_one_atsr …
#define dmar_release_one_atsr …
#define dmar_parse_one_satc …

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 */

extern bool dmar_platform_optin(void);

#else /* CONFIG_DMAR_TABLE */

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

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

static inline bool dmar_platform_optin(void)
{
	return false;
}

static inline void detect_intel_iommu(void)
{
}

#endif /* CONFIG_DMAR_TABLE */

struct irte { … };

static inline void dmar_copy_shared_irte(struct irte *dst, struct irte *src)
{ … }

#define PDA_LOW_BIT …
#define PDA_HIGH_BIT …

/* 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__ */