/*
 * Copyright (c) 2016 HGST, a Western Digital Company.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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.
 */
#ifndef _RDMA_RW_H
#define _RDMA_RW_H

#include <linux/dma-mapping.h>
#include <linux/scatterlist.h>
#include <rdma/ib_verbs.h>
#include <rdma/rdma_cm.h>
#include <rdma/mr_pool.h>

struct rdma_rw_ctx {
	/* number of RDMA READ/WRITE WRs (not counting MR WRs) */
	u32			nr_ops;

	/* tag for the union below: */
	u8			type;

	union {
		/* for mapping a single SGE: */
		struct {
			struct ib_sge		sge;
			struct ib_rdma_wr	wr;
		} single;

		/* for mapping of multiple SGEs: */
		struct {
			struct ib_sge		*sges;
			struct ib_rdma_wr	*wrs;
		} map;

		/* for registering multiple WRs: */
		struct rdma_rw_reg_ctx {
			struct ib_sge		sge;
			struct ib_rdma_wr	wr;
			struct ib_reg_wr	reg_wr;
			struct ib_send_wr	inv_wr;
			struct ib_mr		*mr;
		} *reg;

		struct {
			struct rdma_rw_reg_ctx	data;
			struct rdma_rw_reg_ctx	prot;
			struct ib_send_wr	sig_inv_wr;
			struct ib_mr		*sig_mr;
			struct ib_sge		sig_sge;
			struct ib_sig_handover_wr sig_wr;
		} *sig;
	};
};

int rdma_rw_ctx_init(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u8 port_num,
		struct scatterlist *sg, u32 sg_cnt, u32 sg_offset,
		u64 remote_addr, u32 rkey, enum dma_data_direction dir);
void rdma_rw_ctx_destroy(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u8 port_num,
		struct scatterlist *sg, u32 sg_cnt,
		enum dma_data_direction dir);

int rdma_rw_ctx_signature_init(struct rdma_rw_ctx *ctx, struct ib_qp *qp,
		u8 port_num, struct scatterlist *sg, u32 sg_cnt,
		struct scatterlist *prot_sg, u32 prot_sg_cnt,
		struct ib_sig_attrs *sig_attrs, u64 remote_addr, u32 rkey,
		enum dma_data_direction dir);
void rdma_rw_ctx_destroy_signature(struct rdma_rw_ctx *ctx, struct ib_qp *qp,
		u8 port_num, struct scatterlist *sg, u32 sg_cnt,
		struct scatterlist *prot_sg, u32 prot_sg_cnt,
		enum dma_data_direction dir);

struct ib_send_wr *rdma_rw_ctx_wrs(struct rdma_rw_ctx *ctx, struct ib_qp *qp,
		u8 port_num, struct ib_cqe *cqe, struct ib_send_wr *chain_wr);
int rdma_rw_ctx_post(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u8 port_num,
		struct ib_cqe *cqe, struct ib_send_wr *chain_wr);

void rdma_rw_init_qp(struct ib_device *dev, struct ib_qp_init_attr *attr);
int rdma_rw_init_mrs(struct ib_qp *qp, struct ib_qp_init_attr *attr);
void rdma_rw_cleanup_mrs(struct ib_qp *qp);

#endif /* _RDMA_RW_H */
mentation?id=3ab3ffcaca99e0b77480d77bd393fc227b09069f'>Documentation</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation/arm?id=3ab3ffcaca99e0b77480d77bd393fc227b09069f'>arm</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='3ab3ffcaca99e0b77480d77bd393fc227b09069f'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Eric Sandeen &lt;sandeen@sandeen.net&gt;</td><td class='right'>2016-04-06 07:57:47 +1000</td></tr>
<tr><th>committer</th><td>Dave Chinner &lt;david@fromorbit.com&gt;</td><td class='right'>2016-04-06 07:57:47 +1000</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/arm?id=3ab3ffcaca99e0b77480d77bd393fc227b09069f'>3ab3ffcaca99e0b77480d77bd393fc227b09069f</a> (<a href='/cgit.cgi/linux/net-next.git/patch/Documentation/arm?id=3ab3ffcaca99e0b77480d77bd393fc227b09069f'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=3ab3ffcaca99e0b77480d77bd393fc227b09069f'>6814f8e68961f16659116de9407756f64fb60add</a> /<a href='/cgit.cgi/linux/net-next.git/tree/Documentation/arm?id=3ab3ffcaca99e0b77480d77bd393fc227b09069f'>Documentation/arm</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/arm?id=7af5ad28a603f2d1ef4c579b8ab0a9d4767a348e'>7af5ad28a603f2d1ef4c579b8ab0a9d4767a348e</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/arm?id=3ab3ffcaca99e0b77480d77bd393fc227b09069f&amp;id2=7af5ad28a603f2d1ef4c579b8ab0a9d4767a348e'>diff</a>)</td></tr></table>
<div class='commit-subject'>xfs: collapse cases in xfs_attr3_leaf_list_int</div><div class='commit-msg'>Consolidate the 2 calls to -&gt;put_listent in
xfs_attr3_leaf_list_int(), by setting up name, namelen, and
valuelen for the local vs remote cases, then call -&gt;put_listent
and do the error handling all in one spot.

Signed-off-by: Eric Sandeen &lt;sandeen@redhat.com&gt;


</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=3ab3ffcaca99e0b77480d77bd393fc227b09069f'>Diffstat</a> (limited to 'Documentation/arm')</div><table summary='diffstat' class='diffstat'>