FreeBSD/Linux Kernel Cross Reference
sys/ofed/include/rdma/ib_hdrs.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
      *
      * 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.
     *
     * $FreeBSD$
     */
    
    #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 */

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