[linux-block.git] / include / linux / amd-iommu.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2007-2010 Advanced Micro Devices, Inc.
 * Author: Joerg Roedel <joerg.roedel@amd.com>
 *         Leo Duran <leo.duran@amd.com>
 */

#ifndef _ASM_X86_AMD_IOMMU_H
#define _ASM_X86_AMD_IOMMU_H

#include <linux/types.h>

struct amd_iommu;

/*
 * This is mainly used to communicate information back-and-forth
 * between SVM and IOMMU for setting up and tearing down posted
 * interrupt
 */
struct amd_iommu_pi_data {
	u32 ga_tag;
	u32 prev_ga_tag;
	u64 base;
	bool is_guest_mode;
	struct vcpu_data *vcpu_data;
	void *ir_data;
};

#ifdef CONFIG_AMD_IOMMU

struct task_struct;
struct pci_dev;

extern void amd_iommu_detect(void);

#else /* CONFIG_AMD_IOMMU */

static inline void amd_iommu_detect(void) { }

#endif /* CONFIG_AMD_IOMMU */

#if defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP)

/* IOMMU AVIC Function */
extern int amd_iommu_register_ga_log_notifier(int (*notifier)(u32));

extern int
amd_iommu_update_ga(int cpu, bool is_run, void *data);

extern int amd_iommu_activate_guest_mode(void *data);
extern int amd_iommu_deactivate_guest_mode(void *data);

#else /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */

static inline int
amd_iommu_register_ga_log_notifier(int (*notifier)(u32))
{
	return 0;
}

static inline int
amd_iommu_update_ga(int cpu, bool is_run, void *data)
{
	return 0;
}

static inline int amd_iommu_activate_guest_mode(void *data)
{
	return 0;
}

static inline int amd_iommu_deactivate_guest_mode(void *data)
{
	return 0;
}
#endif /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */

int amd_iommu_get_num_iommus(void);
bool amd_iommu_pc_supported(void);
u8 amd_iommu_pc_get_max_banks(unsigned int idx);
u8 amd_iommu_pc_get_max_counters(unsigned int idx);
int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn,
		u64 *value);
int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn,
		u64 *value);
struct amd_iommu *get_amd_iommu(unsigned int idx);

#ifdef CONFIG_KVM_AMD_SEV
int amd_iommu_snp_disable(void);
#else
static inline int amd_iommu_snp_disable(void) { return 0; }
#endif

#endif /* _ASM_X86_AMD_IOMMU_H */
Commit	Line	Data
	1	/* SPDX-License-Identifier: GPL-2.0-only */
	2	/*
	3	* Copyright (C) 2007-2010 Advanced Micro Devices, Inc.
	4	* Author: Joerg Roedel <joerg.roedel@amd.com>
	5	* Leo Duran <leo.duran@amd.com>
	6	*/
	7
	8	#ifndef _ASM_X86_AMD_IOMMU_H
	9	#define _ASM_X86_AMD_IOMMU_H
	10
	11	#include <linux/types.h>
	12
	13	struct amd_iommu;
	14
	15	/*
	16	* This is mainly used to communicate information back-and-forth
	17	* between SVM and IOMMU for setting up and tearing down posted
	18	* interrupt
	19	*/
	20	struct amd_iommu_pi_data {
	21	u32 ga_tag;
	22	u32 prev_ga_tag;
	23	u64 base;
	24	bool is_guest_mode;
	25	struct vcpu_data *vcpu_data;
	26	void *ir_data;
	27	};
	28
	29	#ifdef CONFIG_AMD_IOMMU
	30
	31	struct task_struct;
	32	struct pci_dev;
	33
	34	extern void amd_iommu_detect(void);
	35
	36	#else /* CONFIG_AMD_IOMMU */
	37
	38	static inline void amd_iommu_detect(void) { }
	39
	40	#endif /* CONFIG_AMD_IOMMU */
	41
	42	#if defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP)
	43
	44	/* IOMMU AVIC Function */
	45	extern int amd_iommu_register_ga_log_notifier(int (*notifier)(u32));
	46
	47	extern int
	48	amd_iommu_update_ga(int cpu, bool is_run, void *data);
	49
	50	extern int amd_iommu_activate_guest_mode(void *data);
	51	extern int amd_iommu_deactivate_guest_mode(void *data);
	52
	53	#else /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */
	54
	55	static inline int
	56	amd_iommu_register_ga_log_notifier(int (*notifier)(u32))
	57	{
	58	return 0;
	59	}
	60
	61	static inline int
	62	amd_iommu_update_ga(int cpu, bool is_run, void *data)
	63	{
	64	return 0;
	65	}
	66
	67	static inline int amd_iommu_activate_guest_mode(void *data)
	68	{
	69	return 0;
	70	}
	71
	72	static inline int amd_iommu_deactivate_guest_mode(void *data)
	73	{
	74	return 0;
	75	}
	76	#endif /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */
	77
	78	int amd_iommu_get_num_iommus(void);
	79	bool amd_iommu_pc_supported(void);
	80	u8 amd_iommu_pc_get_max_banks(unsigned int idx);
	81	u8 amd_iommu_pc_get_max_counters(unsigned int idx);
	82	int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn,
	83	u64 *value);
	84	int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn,
	85	u64 *value);
	86	struct amd_iommu *get_amd_iommu(unsigned int idx);
	87
	88	#ifdef CONFIG_KVM_AMD_SEV
	89	int amd_iommu_snp_disable(void);
	90	#else
	91	static inline int amd_iommu_snp_disable(void) { return 0; }
	92	#endif
	93
	94	#endif /* _ASM_X86_AMD_IOMMU_H */