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util: Introduce vfio helpers

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This is a library to manage the host vfio interface, which could be used
to implement userspace device driver code in QEMU such as NVMe or net
controllers.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20180116060901.17413-3-famz@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
This commit is contained in:
Fam Zheng 2018-01-16 14:08:54 +08:00
parent a37eaa53f9
commit 418026ca43
4 changed files with 772 additions and 0 deletions
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33
include/qemu/vfio-helpers.h Normal file
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/*
* QEMU VFIO helpers
*
* Copyright 2016 - 2018 Red Hat, Inc.
*
* Authors:
* Fam Zheng <famz@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef QEMU_VFIO_HELPERS_H
#define QEMU_VFIO_HELPERS_H
#include "qemu/typedefs.h"
typedef struct QEMUVFIOState QEMUVFIOState;
QEMUVFIOState *qemu_vfio_open_pci(const char *device, Error **errp);
void qemu_vfio_close(QEMUVFIOState *s);
int qemu_vfio_dma_map(QEMUVFIOState *s, void *host, size_t size,
bool temporary, uint64_t *iova_list);
int qemu_vfio_dma_reset_temporary(QEMUVFIOState *s);
void qemu_vfio_dma_unmap(QEMUVFIOState *s, void *host);
void *qemu_vfio_pci_map_bar(QEMUVFIOState *s, int index,
uint64_t offset, uint64_t size,
Error **errp);
void qemu_vfio_pci_unmap_bar(QEMUVFIOState *s, int index, void *bar,
uint64_t offset, uint64_t size);
int qemu_vfio_pci_init_irq(QEMUVFIOState *s, EventNotifier *e,
int irq_type, Error **errp);
#endif