1/*	$OpenBSD: twevar.h,v 1.14 2020/07/22 13:16:04 krw Exp $	*/
2
3/*
4 * Copyright (c) 2000 Michael Shalayeff
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
25 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
26 * THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29struct twe_softc;
30
31struct twe_ccb {
32	struct twe_softc	*ccb_sc;
33	struct twe_cmd		*ccb_cmd;
34	struct scsi_xfer	*ccb_xs;
35	paddr_t			ccb_cmdpa;
36	TAILQ_ENTRY(twe_ccb)	ccb_link;
37	enum {
38		TWE_CCB_FREE, TWE_CCB_READY, TWE_CCB_QUEUED, TWE_CCB_PREQUEUED,
39		TWE_CCB_DONE
40	} ccb_state;
41	int			ccb_length;
42	void			*ccb_data;
43	void			*ccb_realdata;
44	bus_dmamap_t		ccb_dmamap;
45	bus_dma_segment_t	ccb_2bseg[TWE_MAXOFFSETS];
46	int			ccb_2nseg;
47};
48
49typedef TAILQ_HEAD(twe_queue_head, twe_ccb)	twe_queue_head;
50
51struct twe_softc {
52	struct device	sc_dev;
53	void		*sc_ih;
54	struct proc	*sc_thread;
55	int		sc_thread_on;
56
57	bus_space_tag_t	iot;
58	bus_space_handle_t ioh;
59	bus_dma_tag_t	dmat;
60
61	void *sc_cmds;
62	bus_dmamap_t	sc_cmdmap;
63	bus_dma_segment_t sc_cmdseg[1];
64	struct twe_ccb	sc_ccbs[TWE_MAXCMDS];
65	twe_queue_head	sc_free_ccb;
66	twe_queue_head	sc_ccbq;
67	twe_queue_head	sc_ccb2q;
68	twe_queue_head	sc_done_ccb;
69	struct mutex	sc_ccb_mtx;
70	struct scsi_iopool sc_iopool;
71
72	struct timeout	sc_enqueue_tmo;
73
74	struct scsi_iohandler sc_aen;
75
76	struct {
77		int	hd_present;
78		int	hd_devtype;
79		int	hd_lock;
80		int	hd_size;
81	} sc_hdr[TWE_MAX_UNITS];
82};
83
84/* XXX These have to become spinlocks in case of SMP */
85#define TWE_LOCK(sc) splbio()
86#define TWE_UNLOCK(sc, lock) splx(lock)
87typedef int twe_lock_t;
88
89int	twe_attach(struct twe_softc *);
90int	twe_intr(void *);
91