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Diffstat (limited to 'include/rdma/ib_hdrs.h')
| -rw-r--r-- | include/rdma/ib_hdrs.h | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/include/rdma/ib_hdrs.h b/include/rdma/ib_hdrs.h new file mode 100644 index 000000000000..408439fe911e --- /dev/null +++ b/include/rdma/ib_hdrs.h @@ -0,0 +1,178 @@ +/* + * 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 */ |