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/*
* Copyright (c) 2020 Nutanix Inc. All rights reserved.
*
* Authors: Thanos Makatos <thanos@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_COMMON_H
#define LIB_VFIO_USER_PCI_CAPS_COMMON_H
#include <linux/pci_regs.h>
#include <stddef.h>
#ifdef __cplusplus
extern "C" {
#endif
struct cap_hdr {
uint8_t id;
uint8_t next;
} __attribute__((packed));
_Static_assert(sizeof(struct cap_hdr) == 0x2, "bad PCI capability header size");
_Static_assert(offsetof(struct cap_hdr, id) == PCI_CAP_LIST_ID, "bad offset");
_Static_assert(offsetof(struct cap_hdr, next) == PCI_CAP_LIST_NEXT, "bad offset");
/*
* Vendor-specific capability
*/
struct vsc {
struct cap_hdr hdr;
uint8_t size;
uint8_t data[];
} __attribute__ ((packed));
/*
* PCI Express extended capability header.
*/
struct pcie_ext_cap_hdr {
unsigned int id:16;
unsigned int version:4;
unsigned int next:12;
} __attribute__((packed));
/* PCI Express vendor-specific capability header (PCIE 7.19) */
struct pcie_ext_cap_vsc_hdr {
struct pcie_ext_cap_hdr hdr;
unsigned int id:16;
unsigned int rev:4;
unsigned int len:12;
uint8_t data[];
} __attribute__((packed));
#ifdef __cplusplus
}
#endif
#endif /* LIB_VFIO_USER_PCI_CAPS_COMMON_H */
/* ex: set tabstop=4 shiftwidth=4 softtabstop=4 expandtab: */
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