[mirror_ubuntu-bionic-kernel.git] / drivers / infiniband / hw / hfi1 / verbs_txreq.h

/*
 * 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 HFI1_VERBS_TXREQ_H
#define HFI1_VERBS_TXREQ_H

#include <linux/types.h>
#include <linux/slab.h>

#include "verbs.h"
#include "sdma_txreq.h"
#include "iowait.h"

struct verbs_txreq {
	struct hfi1_sdma_header	phdr;
	struct sdma_txreq       txreq;
	struct rvt_qp           *qp;
	struct rvt_swqe         *wqe;
	struct rvt_mregion	*mr;
	struct rvt_sge_state    *ss;
	struct sdma_engine     *sde;
	struct send_context     *psc;
	u16                     hdr_dwords;
};

struct hfi1_ibdev;
struct verbs_txreq *__get_txreq(struct hfi1_ibdev *dev,
				struct rvt_qp *qp);

static inline struct verbs_txreq *get_txreq(struct hfi1_ibdev *dev,
					    struct rvt_qp *qp)
	__must_hold(&qp->slock)
{
	struct verbs_txreq *tx;
	struct hfi1_qp_priv *priv = qp->priv;

	tx = kmem_cache_alloc(dev->verbs_txreq_cache, GFP_ATOMIC);
	if (unlikely(!tx)) {
		/* call slow path to get the lock */
		tx = __get_txreq(dev, qp);
		if (IS_ERR(tx))
			return tx;
	}
	tx->qp = qp;
	tx->mr = NULL;
	tx->sde = priv->s_sde;
	tx->psc = priv->s_sendcontext;
	/* so that we can test if the sdma decriptors are there */
	tx->txreq.num_desc = 0;
	return tx;
}

static inline struct sdma_txreq *get_sdma_txreq(struct verbs_txreq *tx)
{
	return &tx->txreq;
}

static inline struct verbs_txreq *get_waiting_verbs_txreq(struct rvt_qp *qp)
{
	struct sdma_txreq *stx;
	struct hfi1_qp_priv *priv = qp->priv;

	stx = iowait_get_txhead(&priv->s_iowait);
	if (stx)
		return container_of(stx, struct verbs_txreq, txreq);
	return NULL;
}

void hfi1_put_txreq(struct verbs_txreq *tx);
int verbs_txreq_init(struct hfi1_ibdev *dev);
void verbs_txreq_exit(struct hfi1_ibdev *dev);

#endif                         /* HFI1_VERBS_TXREQ_H */
Commit	Line	Data
45842abb MM	1	/*
	2	* Copyright(c) 2016 Intel Corporation.
	3	*
	4	* This file is provided under a dual BSD/GPLv2 license. When using or
	5	* redistributing this file, you may do so under either license.
	6	*
	7	* GPL LICENSE SUMMARY
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of version 2 of the GNU General Public License as
	11	* published by the Free Software Foundation.
	12	*
	13	* This program is distributed in the hope that it will be useful, but
	14	* WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	16	* General Public License for more details.
	17	*
	18	* BSD LICENSE
	19	*
	20	* Redistribution and use in source and binary forms, with or without
	21	* modification, are permitted provided that the following conditions
	22	* are met:
	23	*
	24	* - Redistributions of source code must retain the above copyright
	25	* notice, this list of conditions and the following disclaimer.
	26	* - Redistributions in binary form must reproduce the above copyright
	27	* notice, this list of conditions and the following disclaimer in
	28	* the documentation and/or other materials provided with the
	29	* distribution.
	30	* - Neither the name of Intel Corporation nor the names of its
	31	* contributors may be used to endorse or promote products derived
	32	* from this software without specific prior written permission.
	33	*
	34	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	35	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	36	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	37	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	38	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	39	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	40	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	41	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	42	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	43	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	44	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	45	*
	46	*/
	47
	48	#ifndef HFI1_VERBS_TXREQ_H
	49	#define HFI1_VERBS_TXREQ_H
	50
	51	#include <linux/types.h>
	52	#include <linux/slab.h>
	53
	54	#include "verbs.h"
	55	#include "sdma_txreq.h"
	56	#include "iowait.h"
	57
	58	struct verbs_txreq {
d4d602e9	59	struct hfi1_sdma_header phdr;
45842abb MM	60	struct sdma_txreq txreq;
	61	struct rvt_qp *qp;
	62	struct rvt_swqe *wqe;
	63	struct rvt_mregion *mr;
	64	struct rvt_sge_state *ss;
	65	struct sdma_engine *sde;
711e104d	66	struct send_context *psc;
45842abb MM	67	u16 hdr_dwords;
	68	};
	69
	70	struct hfi1_ibdev;
	71	struct verbs_txreq __get_txreq(struct hfi1_ibdev dev,
	72	struct rvt_qp *qp);
	73
	74	static inline struct verbs_txreq get_txreq(struct hfi1_ibdev dev,
	75	struct rvt_qp *qp)
2aee309d	76	__must_hold(&qp->slock)
45842abb MM	77	{
45842abb MM	78	struct verbs_txreq *tx;
711e104d	79	struct hfi1_qp_priv *priv = qp->priv;
45842abb MM	80
	81	tx = kmem_cache_alloc(dev->verbs_txreq_cache, GFP_ATOMIC);
	82	if (unlikely(!tx)) {
	83	/* call slow path to get the lock */
	84	tx = __get_txreq(dev, qp);
	85	if (IS_ERR(tx))
	86	return tx;
	87	}
	88	tx->qp = qp;
	89	tx->mr = NULL;
711e104d MM	90	tx->sde = priv->s_sde;
	91	tx->psc = priv->s_sendcontext;
	92	/* so that we can test if the sdma decriptors are there */
	93	tx->txreq.num_desc = 0;
45842abb MM	94	return tx;
	95	}
	96
14553ca1 MM	97	static inline struct sdma_txreq get_sdma_txreq(struct verbs_txreq tx)
	98	{
	99	return &tx->txreq;
	100	}
	101
711e104d MM	102	static inline struct verbs_txreq get_waiting_verbs_txreq(struct rvt_qp qp)
	103	{
	104	struct sdma_txreq *stx;
	105	struct hfi1_qp_priv *priv = qp->priv;
	106
	107	stx = iowait_get_txhead(&priv->s_iowait);
	108	if (stx)
	109	return container_of(stx, struct verbs_txreq, txreq);
	110	return NULL;
	111	}
	112
45842abb MM	113	void hfi1_put_txreq(struct verbs_txreq *tx);
	114	int verbs_txreq_init(struct hfi1_ibdev *dev);
	115	void verbs_txreq_exit(struct hfi1_ibdev *dev);
	116
	117	#endif /* HFI1_VERBS_TXREQ_H */