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| -rw-r--r-- | lib/caps/msix.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/lib/caps/msix.h b/lib/caps/msix.h new file mode 100644 index 0000000..4cc41a8 --- /dev/null +++ b/lib/caps/msix.h @@ -0,0 +1,70 @@ +/* + * 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. + * + */ + +#include <linux/pci_regs.h> + +struct mxid { + unsigned int cid:8; + unsigned int next:8; +} __attribute__ ((packed)); +_Static_assert(sizeof(struct mxid) == 0x2, "bad MXID size"); + +struct mxc { + unsigned int ts:11; + unsigned int reserved:3; + unsigned int fm:1; + unsigned int mxe:1; +} __attribute__ ((packed)); +_Static_assert(sizeof(struct mxc) == PCI_MSIX_FLAGS, "bad MXC size"); + +struct mtab { + unsigned int tbir:3; + unsigned int to:29; +} __attribute__ ((packed)); +_Static_assert(sizeof(struct mtab) == PCI_MSIX_TABLE, "bad MTAB size"); + +struct mpba { + unsigned int pbir:3; + unsigned int pbao:29; +} __attribute__ ((packed)); +_Static_assert(sizeof(struct mtab) == PCI_MSIX_PBA - PCI_MSIX_TABLE, + "bad MPBA size"); + +struct msixcap { + struct mxid mxid; + 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"); + +/* ex: set tabstop=4 shiftwidth=4 softtabstop=4 expandtab: */ |