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Commit 7368ef02 authored by Mike Marciniszyn's avatar Mike Marciniszyn Committed by Doug Ledford
Browse files

IB/core: Add ib headers for general use 



Add IB headers, defines, and accessors that are identical
in both qib and hfi1 into the core includes.

The accessors for be maintenance of __be64 fields since
alignment is potentially invalid and can differ based on
the presense of the GRH.

{hfi1,qib}_ib_headers will be ib_headers.
{hfi1,qib|_other_headers will be ib_other_headers.

Reviewed-by: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: default avatarDon Hiatt <don.hiatt@intel.com>
Signed-off-by: default avatarMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 4d6f85c3

include/rdma/ib_hdrs.h

0 → 100644
+178 −0
Original line number Diff line number Diff line 
/*

 * 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 */