amd-iommu.h

Go to the documentation of this file.

/*
 * Copyright (C) 2007-2010 Advanced Micro Devices, Inc.
 * Author: Joerg Roedel <joerg.roedel@amd.com>
 *         Leo Duran <leo.duran@amd.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 *
 * This program is distributed in the hope that 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
 */

#ifndef _ASM_X86_AMD_IOMMU_H
#define _ASM_X86_AMD_IOMMU_H

#include <linux/types.h>

#ifdef CONFIG_AMD_IOMMU

struct task_struct;
struct pci_dev;

extern int amd_iommu_detect(void);
extern int amd_iommu_init_hardware(void);

#define AMD_PRI_DEV_ERRATUM_ENABLE_RESET        0
#define AMD_PRI_DEV_ERRATUM_LIMIT_REQ_ONE       1

extern void amd_iommu_enable_device_erratum(struct pci_dev *pdev, u32 erratum);

extern int amd_iommu_init_device(struct pci_dev *pdev, int pasids);

extern void amd_iommu_free_device(struct pci_dev *pdev);

extern int amd_iommu_bind_pasid(struct pci_dev *pdev, int pasid,
                struct task_struct *task);

extern void amd_iommu_unbind_pasid(struct pci_dev *pdev, int pasid);

#define AMD_IOMMU_INV_PRI_RSP_SUCCESS   0
#define AMD_IOMMU_INV_PRI_RSP_INVALID   1
#define AMD_IOMMU_INV_PRI_RSP_FAIL  2

typedef int (*amd_iommu_invalid_ppr_cb)(struct pci_dev *pdev,
                    int pasid,
                    unsigned long address,
                    u16);

extern int amd_iommu_set_invalid_ppr_cb(struct pci_dev *pdev,
                    amd_iommu_invalid_ppr_cb cb);

#define AMD_IOMMU_DEVICE_FLAG_ATS_SUP     0x1    /* ATS feature supported */
#define AMD_IOMMU_DEVICE_FLAG_PRI_SUP     0x2    /* PRI feature supported */
#define AMD_IOMMU_DEVICE_FLAG_PASID_SUP   0x4    /* PASID context supported */
#define AMD_IOMMU_DEVICE_FLAG_EXEC_SUP    0x8    /* Device may request execution
                            on memory pages */
#define AMD_IOMMU_DEVICE_FLAG_PRIV_SUP   0x10    /* Device may request
                            super-user privileges */

struct amd_iommu_device_info {
    int max_pasids;
    u32 flags;
};

extern int amd_iommu_device_info(struct pci_dev *pdev,
                 struct amd_iommu_device_info *info);

typedef void (*amd_iommu_invalidate_ctx)(struct pci_dev *pdev, int pasid);

extern int amd_iommu_set_invalidate_ctx_cb(struct pci_dev *pdev,
                       amd_iommu_invalidate_ctx cb);

#else

static inline int amd_iommu_detect(void) { return -ENODEV; }

#endif

#endif /* _ASM_X86_AMD_IOMMU_H */