/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2011 NetApp, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _IO_IOMMU_H_
#define _IO_IOMMU_H_

typedef int (*iommu_init_func_t)(void);
typedef void (*iommu_cleanup_func_t)(void);
typedef void (*iommu_enable_func_t)(void);
typedef void (*iommu_disable_func_t)(void);
typedef void *(*iommu_create_domain_t)(vm_paddr_t maxaddr);
typedef void (*iommu_destroy_domain_t)(void *domain);
typedef int (*iommu_create_mapping_t)(void *domain, vm_paddr_t gpa,
    vm_paddr_t hpa, uint64_t len, uint64_t *res_len);
typedef int (*iommu_remove_mapping_t)(void *domain, vm_paddr_t gpa,
    uint64_t len, uint64_t *res_len);
typedef int (*iommu_add_device_t)(void *domain, device_t dev, uint16_t rid);
typedef int (*iommu_remove_device_t)(void *dom, device_t dev, uint16_t rid);
typedef int (*iommu_invalidate_tlb_t)(void *dom);

struct iommu_ops {
        iommu_init_func_t       init;           /* module wide */
        iommu_cleanup_func_t    cleanup;
        iommu_enable_func_t     enable;
        iommu_disable_func_t    disable;

        iommu_create_domain_t   create_domain;  /* domain-specific */
        iommu_destroy_domain_t  destroy_domain;
        iommu_create_mapping_t  create_mapping;
        iommu_remove_mapping_t  remove_mapping;
        iommu_add_device_t      add_device;
        iommu_remove_device_t   remove_device;
        iommu_invalidate_tlb_t  invalidate_tlb;
};

extern const struct iommu_ops iommu_ops_intel;
extern const struct iommu_ops iommu_ops_amd;

void    iommu_cleanup(void);
void    *iommu_host_domain(void);
void    *iommu_create_domain(vm_paddr_t maxaddr);
void    iommu_destroy_domain(void *dom);
int     iommu_create_mapping(void *dom, vm_paddr_t gpa, vm_paddr_t hpa,
            size_t len);
int     iommu_remove_mapping(void *dom, vm_paddr_t gpa, size_t len);
int     iommu_add_device(void *dom, device_t dev, uint16_t rid);
int     iommu_remove_device(void *dom, device_t dev, uint16_t rid);
int     iommu_invalidate_tlb(void *domain);
#endif