1 /*        $NetBSD: uhavar.h,v 1.16 2012/10/27 17:18:23 chs Exp $      */
2 
3 /*-
4  * Copyright (c) 1998 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 and by Jason R. Thorpe of the Numerical Aerospace
9  * Simulation Facility, NASA Ames Research Center.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  *    notice, this list of conditions and the following disclaimer.
16  * 2. Redistributions in binary form must reproduce the above copyright
17  *    notice, this list of conditions and the following disclaimer in the
18  *    documentation and/or other materials provided with the distribution.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30  * POSSIBILITY OF SUCH DAMAGE.
31  */
32 
33 #include <sys/queue.h>
34 
35 #define UHA_MSCP_MAX          32        /* store up to 32 MSCPs at one time */
36 #define   MSCP_HASH_SIZE      32        /* hash table size for phystokv */
37 #define   MSCP_HASH_SHIFT     9
38 #define MSCP_HASH(x)          ((((long)(x))>>MSCP_HASH_SHIFT) & (MSCP_HASH_SIZE - 1))
39 
40 struct uha_softc {
41           device_t sc_dev;
42 
43           bus_space_tag_t sc_iot;
44           bus_space_handle_t sc_ioh;
45           bus_dma_tag_t       sc_dmat;
46           void *sc_ih;
47 
48           int sc_dmaflags;    /* bus-specific DMA map creation flags */
49 
50           void (*start_mbox)(struct uha_softc *, struct uha_mscp *);
51           int (*poll)(struct uha_softc *, struct scsipi_xfer *, int);
52           void (*init)(struct uha_softc *);
53 
54           bus_dmamap_t sc_dmamap_mscp;  /* maps the mscps */
55           struct uha_mscp *sc_mscps;    /* all our mscps */
56 
57           struct uha_mscp *sc_mscphash[MSCP_HASH_SIZE];
58           TAILQ_HEAD(, uha_mscp) sc_free_mscp;
59           int sc_nummscps;
60 
61           struct scsipi_adapter sc_adapter;
62           struct scsipi_channel sc_channel;
63 };
64 
65 /*
66  * Offset of an MSCP from the beginning of the MSCP DMA mapping.
67  */
68 #define   UHA_MSCP_OFF(m)     (((u_long)(m)) - ((u_long)&sc->sc_mscps[0]))
69 
70 struct uha_probe_data {
71           int sc_irq, sc_drq;
72           int sc_scsi_dev;
73 };
74 
75 void      uha_attach(struct uha_softc *, struct uha_probe_data *);
76 void      uha_timeout(void *arg);
77 struct    uha_mscp *uha_mscp_phys_kv(struct uha_softc *, u_long);
78 void      uha_done(struct uha_softc *, struct uha_mscp *);
79