Differential D10858 Diff 28682 sys/ofed/include/rdma/ib_hdrs.h

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sys/ofed/include/rdma/ib_hdrs.h

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				/*
				* Copyright(c) 2016 Intel Corporation.
				*
				* This file is provided under a dual BSD/GPLv2 license. When using or
				* redistributing this file, you may do so under either license.
				*
				* GPL LICENSE SUMMARY
				*
				* This program is free software; you can redistribute it and/or modify
				* it under the terms of version 2 of the GNU General Public License as
				* published by the Free Software Foundation.
				*
				* This program is distributed in the hope that it will be useful, but
				* WITHOUT ANY WARRANTY; without even the implied warranty of
				* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
				* General Public License for more details.
				*
				* BSD LICENSE
				*
				* 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 Intel Corporation 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 THE COPYRIGHT
				* OWNER OR CONTRIBUTORS 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 IB_HDRS_H
				#define IB_HDRS_H

				#include <linux/types.h>
				#include <asm/unaligned.h>
				#include <rdma/ib_verbs.h>

				#define IB_SEQ_NAK (3 << 29)

				/* AETH NAK opcode values */
				#define IB_RNR_NAK 0x20
				#define IB_NAK_PSN_ERROR 0x60
				#define IB_NAK_INVALID_REQUEST 0x61
				#define IB_NAK_REMOTE_ACCESS_ERROR 0x62
				#define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63
				#define IB_NAK_INVALID_RD_REQUEST 0x64

				#define IB_BTH_REQ_ACK BIT(31)
				#define IB_BTH_SOLICITED BIT(23)
				#define IB_BTH_MIG_REQ BIT(22)

				#define IB_GRH_VERSION 6
				#define IB_GRH_VERSION_MASK 0xF
				#define IB_GRH_VERSION_SHIFT 28
				#define IB_GRH_TCLASS_MASK 0xFF
				#define IB_GRH_TCLASS_SHIFT 20
				#define IB_GRH_FLOW_MASK 0xFFFFF
				#define IB_GRH_FLOW_SHIFT 0
				#define IB_GRH_NEXT_HDR 0x1B

				struct ib_reth {
				__be64 vaddr; /* potentially unaligned */
				__be32 rkey;
				__be32 length;
				} __packed;

				struct ib_atomic_eth {
				__be64 vaddr; /* potentially unaligned */
				__be32 rkey;
				__be64 swap_data; /* potentially unaligned */
				__be64 compare_data; /* potentially unaligned */
				} __packed;

				union ib_ehdrs {
				struct {
				__be32 deth[2];
				__be32 imm_data;
				} ud;
				struct {
				struct ib_reth reth;
				__be32 imm_data;
				} rc;
				struct {
				__be32 aeth;
				__be64 atomic_ack_eth; /* potentially unaligned */
				} __packed at;
				__be32 imm_data;
				__be32 aeth;
				__be32 ieth;
				struct ib_atomic_eth atomic_eth;
				} __packed;

				struct ib_other_headers {
				__be32 bth[3];
				union ib_ehdrs u;
				} __packed;

				struct ib_header {
				__be16 lrh[4];
				union {
				struct {
				struct ib_grh grh;
				struct ib_other_headers oth;
				} l;
				struct ib_other_headers oth;
				} u;
				} __packed;

				/* accessors for unaligned __be64 items */

				static inline u64 ib_u64_get(__be64 *p)
				{
				return get_unaligned_be64(p);
				}

				static inline void ib_u64_put(u64 val, __be64 *p)
				{
				put_unaligned_be64(val, p);
				}

				static inline u64 get_ib_reth_vaddr(struct ib_reth *reth)
				{
				return ib_u64_get(&reth->vaddr);
				}

				static inline void put_ib_reth_vaddr(u64 val, struct ib_reth *reth)
				{
				ib_u64_put(val, &reth->vaddr);
				}

				static inline u64 get_ib_ateth_vaddr(struct ib_atomic_eth *ateth)
				{
				return ib_u64_get(&ateth->vaddr);
				}

				static inline void put_ib_ateth_vaddr(u64 val, struct ib_atomic_eth *ateth)
				{
				ib_u64_put(val, &ateth->vaddr);
				}

				static inline u64 get_ib_ateth_swap(struct ib_atomic_eth *ateth)
				{
				return ib_u64_get(&ateth->swap_data);
				}

				static inline void put_ib_ateth_swap(u64 val, struct ib_atomic_eth *ateth)
				{
				ib_u64_put(val, &ateth->swap_data);
				}

				static inline u64 get_ib_ateth_compare(struct ib_atomic_eth *ateth)
				{
				return ib_u64_get(&ateth->compare_data);
				}

				static inline void put_ib_ateth_compare(u64 val, struct ib_atomic_eth *ateth)
				{
				ib_u64_put(val, &ateth->compare_data);
				}

				#endif /* IB_HDRS_H */