81 lines
2.9 KiB
C
81 lines
2.9 KiB
C
/*
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* Copyright (c) 2019 Nutanix Inc. All rights reserved.
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*
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* Authors: Thanos Makatos <thanos@nutanix.com>
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* Swapnil Ingle <swapnil.ingle@nutanix.com>
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* Felipe Franciosi <felipe@nutanix.com>
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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 are met:
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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 the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Nutanix nor the names of its contributors may be
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* used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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*/
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#ifndef LIB_VFIO_USER_PCI_CAPS_H
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#define LIB_VFIO_USER_PCI_CAPS_H
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#include "libvfio-user.h"
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/*
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* This is an arbitrary value we presume is enough: as we statically allocate
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* based on this in struct vfu_ctx, we don't want it to get too big.
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*/
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#define VFU_MAX_CAPS (128)
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struct pci_cap;
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typedef ssize_t (cap_write_cb_t)(vfu_ctx_t *vfu_ctx, struct pci_cap *cap,
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char *buf, size_t count, loff_t offset);
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struct pci_cap {
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const char *name;
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bool extended;
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uint16_t id;
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size_t off;
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size_t hdr_size;
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size_t size;
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unsigned int flags;
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cap_write_cb_t *cb;
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};
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/*
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* Return the first cap (if any) that intersects with the [off, off+count)
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* interval.
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*/
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struct pci_cap *
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cap_find_by_offset(vfu_ctx_t *ctx, loff_t off, size_t count);
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/*
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* Handle an access to a capability. The access is guaranteed to be entirely
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* within a capability.
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*/
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ssize_t
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pci_cap_access(vfu_ctx_t *ctx, char *buf, size_t count, loff_t offset,
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bool is_write);
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bool
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access_is_pci_cap_exp(const vfu_ctx_t *vfu_ctx, size_t region_index,
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uint64_t offset);
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#endif /* LIB_VFIO_USER_PCI_CAPS_H */
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/* ex: set tabstop=4 shiftwidth=4 softtabstop=4 expandtab: */
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