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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_MSIX_H
#define LIB_VFIO_USER_PCI_CAPS_MSIX_H
#include <linux/pci_regs.h>
#ifdef __cplusplus
extern "C" {
#endif
/* Message Control for MSI-X */
struct mxc {
uint16_t ts:11; /* RO */
uint16_t reserved:3; /* read must return 0, write has no effect */
uint16_t fm:1; /* RW */
uint16_t mxe:1; /* RW */
} __attribute__ ((packed));
_Static_assert(sizeof(struct mxc) == PCI_MSIX_FLAGS, "bad MXC size");
/* Table Offset / Table BIR for MSI-X */
struct mtab {
uint32_t tbir:3; /* RO */
uint32_t to:29; /* RO */
} __attribute__ ((packed));
_Static_assert(sizeof(struct mtab) == PCI_MSIX_TABLE, "bad MTAB size");
/* PBA Offset / PBA BIR for MSI-X */
struct mpba {
uint32_t pbir:3; /* RO */
uint32_t pbao:29; /* RO */
} __attribute__ ((packed));
_Static_assert(sizeof(struct mtab) == PCI_MSIX_PBA - PCI_MSIX_TABLE,
"bad MPBA size");
struct msixcap {
struct cap_hdr hdr;
struct mxc mxc;
struct mtab mtab;
struct mpba mpba;
} __attribute__ ((packed)) __attribute__ ((aligned(4)));
_Static_assert(sizeof(struct msixcap) == PCI_CAP_MSIX_SIZEOF, "bad MSI-X size");
_Static_assert(offsetof(struct msixcap, hdr) == 0, "bad offset");
#ifdef __cplusplus
}
#endif
#endif /* VFU_CAP_MSIX_H */
/* ex: set tabstop=4 shiftwidth=4 softtabstop=4 expandtab: */
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