1 /* $NetBSD: scsipi_base.h,v 1.24 2017/02/26 10:58:47 maya Exp $ */
2
3 /*-
4 * Copyright (c) 1998, 2004 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Charles M. Hannum.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #ifndef _DEV_SCSIPI_SCSIPI_BASE_H_
33 #define _DEV_SCSIPI_SCSIPI_BASE_H_
34
35 struct scsipi_xfer *scsipi_get_xs(struct scsipi_periph *, int);
36 void scsipi_put_xs(struct scsipi_xfer *);
37
38 static __inline struct scsipi_xfer *scsipi_make_xs_internal(struct scsipi_periph *,
39 struct scsipi_generic *, int cmdlen, u_char *data_addr,
40 int datalen, int retries, int timeout, struct buf *,
41 int flags) __unused;
42
43 static __inline struct scsipi_xfer *scsipi_make_xs_unlocked(struct scsipi_periph *,
44 struct scsipi_generic *, int cmdlen, u_char *data_addr,
45 int datalen, int retries, int timeout, struct buf *,
46 int flags) __unused;
47
48 static __inline struct scsipi_xfer *scsipi_make_xs_locked(struct scsipi_periph *,
49 struct scsipi_generic *, int cmdlen, u_char *data_addr,
50 int datalen, int retries, int timeout, struct buf *,
51 int flags) __unused;
52
53 /*
54 * Make a scsipi_xfer, and return a pointer to it.
55 */
56
57 static __inline struct scsipi_xfer *
scsipi_make_xs_internal(struct scsipi_periph * periph,struct scsipi_generic * cmd,int cmdlen,u_char * data_addr,int datalen,int retries,int timeout,struct buf * bp,int flags)58 scsipi_make_xs_internal(struct scsipi_periph *periph, struct scsipi_generic *cmd,
59 int cmdlen, u_char *data_addr, int datalen, int retries, int timeout,
60 struct buf *bp, int flags)
61 {
62 struct scsipi_xfer *xs;
63
64 if ((xs = scsipi_get_xs(periph, flags)) == NULL)
65 return (NULL);
66
67 /*
68 * Fill out the scsipi_xfer structure. We don't know whose context
69 * the cmd is in, so copy it.
70 */
71 memcpy(&xs->cmdstore, cmd, cmdlen);
72 xs->cmd = &xs->cmdstore;
73 xs->cmdlen = cmdlen;
74 xs->data = data_addr;
75 xs->datalen = datalen;
76 xs->xs_retries = retries;
77 xs->timeout = timeout;
78 xs->bp = bp;
79
80 return (xs);
81 }
82
83 static __inline struct scsipi_xfer *
scsipi_make_xs_unlocked(struct scsipi_periph * periph,struct scsipi_generic * cmd,int cmdlen,u_char * data_addr,int datalen,int retries,int timeout,struct buf * bp,int flags)84 scsipi_make_xs_unlocked(struct scsipi_periph *periph, struct scsipi_generic *cmd,
85 int cmdlen, u_char *data_addr, int datalen, int retries, int timeout,
86 struct buf *bp, int flags)
87 {
88
89 return scsipi_make_xs_internal(periph, cmd, cmdlen, data_addr,
90 datalen, retries, timeout, bp, flags & ~XS_CTL_NOSLEEP);
91 }
92
93 static __inline struct scsipi_xfer *
scsipi_make_xs_locked(struct scsipi_periph * periph,struct scsipi_generic * cmd,int cmdlen,u_char * data_addr,int datalen,int retries,int timeout,struct buf * bp,int flags)94 scsipi_make_xs_locked(struct scsipi_periph *periph, struct scsipi_generic *cmd,
95 int cmdlen, u_char *data_addr, int datalen, int retries, int timeout,
96 struct buf *bp, int flags)
97 {
98
99 KDASSERT(mutex_owned(chan_mtx(periph->periph_channel)));
100 return scsipi_make_xs_internal(periph, cmd, cmdlen, data_addr,
101 datalen, retries, timeout, bp, flags | XS_CTL_NOSLEEP);
102 }
103
104 #endif /* _DEV_SCSIPI_SCSIPI_BASE_H_ */
105