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