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/*
* Copyright (c) 2019 Nutanix Inc. All rights reserved.
*
* Authors: Thanos Makatos <thanos@nutanix.com>
* Swapnil Ingle <swapnil.ingle@nutanix.com>
* Felipe Franciosi <felipe@nutanix.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Nutanix nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 <COPYRIGHT HOLDER> 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 LIB_VFIO_USER_PCI_CAPS_H
#define LIB_VFIO_USER_PCI_CAPS_H
#include "libvfio-user.h"
/*
* This is an arbitrary value we presume is enough: as we statically allocate
* based on this in struct vfu_ctx, we don't want it to get too big.
*/
#define VFU_MAX_CAPS (128)
struct pci_cap;
typedef ssize_t (cap_write_cb_t)(vfu_ctx_t *vfu_ctx, struct pci_cap *cap,
char *buf, size_t count, loff_t offset);
struct pci_cap {
const char *name;
bool extended;
uint16_t id;
size_t off;
size_t hdr_size;
size_t size;
unsigned int flags;
cap_write_cb_t *cb;
};
/*
* Return the first cap (if any) that intersects with the [off, off+count)
* interval.
*/
struct pci_cap *
cap_find_by_offset(vfu_ctx_t *ctx, loff_t off, size_t count);
/*
* Handle an access to a capability. The access is guaranteed to be entirely
* within a capability.
*/
ssize_t
pci_cap_access(vfu_ctx_t *ctx, char *buf, size_t count, loff_t offset,
bool is_write);
#endif /* LIB_VFIO_USER_PCI_CAPS_H */
/* ex: set tabstop=4 shiftwidth=4 softtabstop=4 expandtab: */
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