mirror of https://github.com/F-Stack/f-stack.git
154 lines
4.2 KiB
C
154 lines
4.2 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2017 6WIND S.A. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of 6WIND nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _RTE_VFIO_H_
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#define _RTE_VFIO_H_
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/*
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* determine if VFIO is present on the system
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*/
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#if !defined(VFIO_PRESENT) && defined(RTE_EAL_VFIO)
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#include <linux/version.h>
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0)
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#define VFIO_PRESENT
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#endif /* kernel version >= 3.6.0 */
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#endif /* RTE_EAL_VFIO */
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#ifdef VFIO_PRESENT
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#include <linux/vfio.h>
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#define VFIO_DIR "/dev/vfio"
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#define VFIO_CONTAINER_PATH "/dev/vfio/vfio"
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#define VFIO_GROUP_FMT "/dev/vfio/%u"
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#define VFIO_NOIOMMU_GROUP_FMT "/dev/vfio/noiommu-%u"
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#define VFIO_GET_REGION_ADDR(x) ((uint64_t) x << 40ULL)
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#define VFIO_GET_REGION_IDX(x) (x >> 40)
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#define VFIO_NOIOMMU_MODE \
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"/sys/module/vfio/parameters/enable_unsafe_noiommu_mode"
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/**
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* Setup vfio_cfg for the device identified by its address.
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* It discovers the configured I/O MMU groups or sets a new one for the device.
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* If a new groups is assigned, the DMA mapping is performed.
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*
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* This function is only relevant to linux and will return
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* an error on BSD.
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*
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* @param sysfs_base
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* sysfs path prefix.
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*
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* @param dev_addr
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* device location.
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*
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* @param vfio_dev_fd
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* VFIO fd.
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*
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* @param device_info
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* Device information.
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*
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* @return
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* 0 on success.
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* <0 on failure.
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* >1 if the device cannot be managed this way.
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*/
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int rte_vfio_setup_device(const char *sysfs_base, const char *dev_addr,
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int *vfio_dev_fd, struct vfio_device_info *device_info);
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/**
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* Release a device mapped to a VFIO-managed I/O MMU group.
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*
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* This function is only relevant to linux and will return
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* an error on BSD.
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*
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* @param sysfs_base
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* sysfs path prefix.
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*
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* @param dev_addr
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* device location.
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*
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* @param fd
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* VFIO fd.
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*
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* @return
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* 0 on success.
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* <0 on failure.
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*/
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int rte_vfio_release_device(const char *sysfs_base, const char *dev_addr, int fd);
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/**
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* Enable a VFIO-related kmod.
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*
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* This function is only relevant to linux and will return
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* an error on BSD.
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*
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* @param modname
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* kernel module name.
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*
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* @return
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* 0 on success.
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* <0 on failure.
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*/
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int rte_vfio_enable(const char *modname);
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/**
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* Check whether a VFIO-related kmod is enabled.
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*
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* This function is only relevant to linux and will return
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* an error on BSD.
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*
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* @param modname
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* kernel module name.
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*
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* @return
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* !0 if true.
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* 0 otherwise.
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*/
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int rte_vfio_is_enabled(const char *modname);
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/**
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* Whether VFIO NOIOMMU mode is enabled.
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*
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* This function is only relevant to linux and will return
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* an error on BSD.
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*
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* @return
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* !0 if true.
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* 0 otherwise.
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*/
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int rte_vfio_noiommu_is_enabled(void);
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#endif /* VFIO_PRESENT */
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#endif /* _RTE_VFIO_H_ */
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