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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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a44f2630d7
This patch updates the SCIF header file and IOCTL interface with the changes required to support RMAs. APIs added include the ability to pin pages and register those pages with SCIF. SCIF kernel clients can also add references to remote registered pages and access them via the CPU. The user space IOCTL interface has been updated to enable SCIF registration, RDMA/CPU copies and fence APIs for RDMA synchronization. Reviewed-by: Nikhil Rao <nikhil.rao@intel.com> Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com> Signed-off-by: Sudeep Dutt <sudeep.dutt@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
216 lines
6.2 KiB
C
216 lines
6.2 KiB
C
/*
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* Intel MIC Platform Software Stack (MPSS)
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2014 Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* BSD LICENSE
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*
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* Copyright(c) 2014 Intel Corporation.
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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
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* are met:
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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Intel SCIF driver.
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*
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*/
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/*
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* -----------------------------------------
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* SCIF IOCTL interface information
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* -----------------------------------------
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*/
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#ifndef SCIF_IOCTL_H
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#define SCIF_IOCTL_H
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#include <linux/types.h>
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/**
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* struct scif_port_id - SCIF port information
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* @node: node on which port resides
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* @port: local port number
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*/
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struct scif_port_id {
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__u16 node;
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__u16 port;
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};
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/**
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* struct scifioctl_connect - used for SCIF_CONNECT IOCTL
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* @self: used to read back the assigned port_id
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* @peer: destination node and port to connect to
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*/
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struct scifioctl_connect {
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struct scif_port_id self;
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struct scif_port_id peer;
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};
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/**
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* struct scifioctl_accept - used for SCIF_ACCEPTREQ IOCTL
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* @flags: flags
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* @peer: global id of peer endpoint
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* @endpt: new connected endpoint descriptor
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*/
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struct scifioctl_accept {
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__s32 flags;
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struct scif_port_id peer;
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__u64 endpt;
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};
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/**
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* struct scifioctl_msg - used for SCIF_SEND/SCIF_RECV IOCTL
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* @msg: message buffer address
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* @len: message length
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* @flags: flags
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* @out_len: number of bytes sent/received
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*/
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struct scifioctl_msg {
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__u64 msg;
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__s32 len;
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__s32 flags;
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__s32 out_len;
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};
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/**
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* struct scifioctl_reg - used for SCIF_REG IOCTL
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* @addr: starting virtual address
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* @len: length of range
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* @offset: offset of window
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* @prot: read/write protection
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* @flags: flags
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* @out_offset: offset returned
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*/
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struct scifioctl_reg {
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__u64 addr;
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__u64 len;
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__s64 offset;
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__s32 prot;
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__s32 flags;
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__s64 out_offset;
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};
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/**
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* struct scifioctl_unreg - used for SCIF_UNREG IOCTL
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* @offset: start of range to unregister
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* @len: length of range to unregister
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*/
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struct scifioctl_unreg {
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__s64 offset;
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__u64 len;
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};
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/**
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* struct scifioctl_copy - used for SCIF DMA copy IOCTLs
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*
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* @loffset: offset in local registered address space to/from
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* which to copy
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* @len: length of range to copy
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* @roffset: offset in remote registered address space to/from
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* which to copy
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* @addr: user virtual address to/from which to copy
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* @flags: flags
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*
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* This structure is used for SCIF_READFROM, SCIF_WRITETO, SCIF_VREADFROM
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* and SCIF_VREADFROM IOCTL's.
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*/
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struct scifioctl_copy {
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__s64 loffset;
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__u64 len;
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__s64 roffset;
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__u64 addr;
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__s32 flags;
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};
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/**
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* struct scifioctl_fence_mark - used for SCIF_FENCE_MARK IOCTL
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* @flags: flags
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* @mark: fence handle which is a pointer to a __s32
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*/
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struct scifioctl_fence_mark {
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__s32 flags;
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__u64 mark;
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};
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/**
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* struct scifioctl_fence_signal - used for SCIF_FENCE_SIGNAL IOCTL
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* @loff: local offset
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* @lval: value to write to loffset
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* @roff: remote offset
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* @rval: value to write to roffset
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* @flags: flags
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*/
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struct scifioctl_fence_signal {
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__s64 loff;
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__u64 lval;
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__s64 roff;
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__u64 rval;
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__s32 flags;
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};
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/**
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* struct scifioctl_node_ids - used for SCIF_GET_NODEIDS IOCTL
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* @nodes: pointer to an array of node_ids
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* @self: ID of the current node
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* @len: length of array
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*/
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struct scifioctl_node_ids {
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__u64 nodes;
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__u64 self;
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__s32 len;
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};
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#define SCIF_BIND _IOWR('s', 1, __u64)
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#define SCIF_LISTEN _IOW('s', 2, __s32)
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#define SCIF_CONNECT _IOWR('s', 3, struct scifioctl_connect)
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#define SCIF_ACCEPTREQ _IOWR('s', 4, struct scifioctl_accept)
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#define SCIF_ACCEPTREG _IOWR('s', 5, __u64)
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#define SCIF_SEND _IOWR('s', 6, struct scifioctl_msg)
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#define SCIF_RECV _IOWR('s', 7, struct scifioctl_msg)
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#define SCIF_REG _IOWR('s', 8, struct scifioctl_reg)
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#define SCIF_UNREG _IOWR('s', 9, struct scifioctl_unreg)
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#define SCIF_READFROM _IOWR('s', 10, struct scifioctl_copy)
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#define SCIF_WRITETO _IOWR('s', 11, struct scifioctl_copy)
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#define SCIF_VREADFROM _IOWR('s', 12, struct scifioctl_copy)
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#define SCIF_VWRITETO _IOWR('s', 13, struct scifioctl_copy)
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#define SCIF_GET_NODEIDS _IOWR('s', 14, struct scifioctl_node_ids)
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#define SCIF_FENCE_MARK _IOWR('s', 15, struct scifioctl_fence_mark)
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#define SCIF_FENCE_WAIT _IOWR('s', 16, __s32)
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#define SCIF_FENCE_SIGNAL _IOWR('s', 17, struct scifioctl_fence_signal)
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#endif /* SCIF_IOCTL_H */
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