1/*	$wasabi: ld_twa.c,v 1.9 2006/02/14 18:44:37 jordanr Exp $	*/
2/*	$NetBSD: ld_twa.c,v 1.14 2010/11/13 13:52:07 uebayasi Exp $ */
3
4/*-
5 * Copyright (c) 2000, 2001, 2002, 2003, 2004 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Andrew Doran, and by Jason R. Thorpe and Jordan Rhody of Wasabi
10 * Systems, Inc.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34/*
35 * 3ware "Apache" RAID controller front-end for ld(4) driver.
36 */
37
38#include <sys/cdefs.h>
39__KERNEL_RCSID(0, "$NetBSD: ld_twa.c,v 1.14 2010/11/13 13:52:07 uebayasi Exp $");
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/kernel.h>
44#include <sys/device.h>
45#include <sys/buf.h>
46#include <sys/bufq.h>
47#include <sys/endian.h>
48#include <sys/dkio.h>
49#include <sys/disk.h>
50#include <sys/proc.h>
51#include <sys/rnd.h>
52
53#include <sys/bus.h>
54
55#include <dev/ldvar.h>
56
57#include <dev/scsipi/scsipi_all.h>
58#include <dev/scsipi/scsipi_disk.h>
59#include <dev/scsipi/scsipiconf.h>
60#include <dev/scsipi/scsi_disk.h>
61
62
63#include <dev/pci/pcireg.h>
64#include <dev/pci/pcivar.h>
65#include <dev/pci/twareg.h>
66#include <dev/pci/twavar.h>
67
68struct ld_twa_softc {
69	struct	ld_softc sc_ld;
70	int	sc_hwunit;
71};
72
73static void	ld_twa_attach(device_t, device_t, void *);
74static int	ld_twa_detach(device_t, int);
75static int	ld_twa_dobio(struct ld_twa_softc *, void *, size_t, daddr_t,
76			     struct buf *);
77static int	ld_twa_dump(struct ld_softc *, void *, int, int);
78static int	ld_twa_flush(struct ld_softc *, int);
79static void	ld_twa_handler(struct twa_request *);
80static int	ld_twa_match(device_t, cfdata_t, void *);
81static int	ld_twa_start(struct ld_softc *, struct buf *);
82
83static void	ld_twa_adjqparam(device_t, int);
84
85static int ld_twa_scsicmd(struct ld_twa_softc *,
86	struct twa_request *, struct buf *);
87
88CFATTACH_DECL_NEW(ld_twa, sizeof(struct ld_twa_softc),
89    ld_twa_match, ld_twa_attach, ld_twa_detach, NULL);
90
91static const struct twa_callbacks ld_twa_callbacks = {
92	ld_twa_adjqparam,
93};
94
95static int
96ld_twa_match(device_t parent, cfdata_t match, void *aux)
97{
98
99	return (1);
100}
101
102static void
103ld_twa_attach(device_t parent, device_t self, void *aux)
104{
105	struct twa_attach_args *twa_args = aux;
106	struct ld_twa_softc *sc = device_private(self);
107	struct ld_softc *ld = &sc->sc_ld;
108	struct twa_softc *twa = device_private(parent);
109
110	ld->sc_dv = self;
111
112	twa_register_callbacks(twa, twa_args->twaa_unit, &ld_twa_callbacks);
113
114	sc->sc_hwunit = twa_args->twaa_unit;
115	ld->sc_maxxfer = twa_get_maxxfer(twa_get_maxsegs());
116	ld->sc_secperunit = twa->sc_units[sc->sc_hwunit].td_size;
117	ld->sc_flags = LDF_ENABLED;
118	ld->sc_secsize = TWA_SECTOR_SIZE;
119	ld->sc_maxqueuecnt = twa->sc_units[sc->sc_hwunit].td_openings;
120	ld->sc_start = ld_twa_start;
121	ld->sc_dump = ld_twa_dump;
122	ld->sc_flush = ld_twa_flush;
123	ldattach(ld);
124}
125
126static int
127ld_twa_detach(device_t self, int flags)
128{
129	struct ld_twa_softc *sc = device_private(self);
130	struct ld_softc *ld = &sc->sc_ld;
131	int error;
132
133	if ((error = ldbegindetach(ld, flags)) != 0)
134		return (error);
135	ldenddetach(ld);
136
137	return (0);
138}
139
140static int
141ld_twa_dobio(struct ld_twa_softc *sc, void *data, size_t datasize,
142	     daddr_t blkno, struct buf *bp)
143{
144	int rv;
145	struct twa_request	*tr;
146	struct twa_softc *twa;
147
148	twa = device_private(device_parent(sc->sc_ld.sc_dv));
149
150	if ((tr = twa_get_request(twa, 0)) == NULL) {
151		return (EAGAIN);
152	}
153	if (bp->b_flags & B_READ) {
154		tr->tr_flags = TWA_CMD_DATA_OUT;
155	} else {
156		tr->tr_flags = TWA_CMD_DATA_IN;
157	}
158
159	tr->tr_data = data;
160	tr->tr_length = datasize;
161	tr->tr_cmd_pkt_type =
162		(TWA_CMD_PKT_TYPE_9K | TWA_CMD_PKT_TYPE_EXTERNAL);
163
164	tr->tr_command->cmd_hdr.header_desc.size_header = 128;
165
166	tr->tr_command->command.cmd_pkt_9k.command.opcode =
167		TWA_OP_EXECUTE_SCSI_COMMAND;
168	tr->tr_command->command.cmd_pkt_9k.unit =
169		sc->sc_hwunit;
170	tr->tr_command->command.cmd_pkt_9k.request_id =
171		tr->tr_request_id;
172	tr->tr_command->command.cmd_pkt_9k.status = 0;
173	tr->tr_command->command.cmd_pkt_9k.sgl_entries = 1;
174	tr->tr_command->command.cmd_pkt_9k.sgl_offset = 16;
175
176	/* offset from end of hdr = max cdb len */
177	ld_twa_scsicmd(sc, tr, bp);
178
179	tr->tr_callback = ld_twa_handler;
180	tr->tr_ld_sc = sc;
181
182	tr->bp = bp;
183
184	rv = twa_map_request(tr);
185
186	return (rv);
187}
188
189static int
190ld_twa_start(struct ld_softc *ld, struct buf *bp)
191{
192
193	return (ld_twa_dobio((struct ld_twa_softc *)ld, bp->b_data,
194	    bp->b_bcount, bp->b_rawblkno, bp));
195}
196
197static void
198ld_twa_handler(struct twa_request *tr)
199{
200	uint8_t	status;
201	struct buf *bp;
202	struct ld_twa_softc *sc;
203	struct twa_softc *twa;
204
205	bp = tr->bp;
206	sc = (struct ld_twa_softc *)tr->tr_ld_sc;
207	twa = device_private(device_parent(sc->sc_ld.sc_dv));
208
209	status = tr->tr_command->command.cmd_pkt_9k.status;
210
211	if (status != 0) {
212		bp->b_error = EIO;
213		bp->b_resid = bp->b_bcount;
214	} else {
215		bp->b_resid = 0;
216		bp->b_error = 0;
217	}
218	twa_release_request(tr);
219
220	lddone(&sc->sc_ld, bp);
221}
222
223static int
224ld_twa_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt)
225{
226
227#if 0
228	/* XXX Unsafe right now. */
229	return (ld_twa_dobio((struct ld_twa_softc *)ld, data,
230	    blkcnt * ld->sc_secsize, blkno, NULL));
231#else
232	return EIO;
233#endif
234
235}
236
237
238static int
239ld_twa_flush(struct ld_softc *ld, int flags)
240{
241	int s, rv = 0;
242	struct twa_request *tr;
243	struct twa_softc *twa = device_private(device_parent(ld->sc_dv));
244	struct ld_twa_softc *sc = (void *)ld;
245	struct twa_command_generic *generic_cmd;
246
247	/* Get a request packet. */
248	tr = twa_get_request_wait(twa, 0);
249	KASSERT(tr != NULL);
250
251	tr->tr_cmd_pkt_type =
252		(TWA_CMD_PKT_TYPE_9K | TWA_CMD_PKT_TYPE_EXTERNAL);
253
254	tr->tr_callback = twa_request_wait_handler;
255	tr->tr_ld_sc = sc;
256
257	tr->tr_command->cmd_hdr.header_desc.size_header = 128;
258
259	generic_cmd = &(tr->tr_command->command.cmd_pkt_7k.generic);
260	generic_cmd->opcode = TWA_OP_FLUSH;
261	generic_cmd->size = 2;
262	generic_cmd->unit = sc->sc_hwunit;
263	generic_cmd->request_id = tr->tr_request_id;
264	generic_cmd->sgl_offset = 0;
265	generic_cmd->host_id = 0;
266	generic_cmd->status = 0;
267	generic_cmd->flags = 0;
268	generic_cmd->count = 0;
269	rv = twa_map_request(tr);
270	s = splbio();
271	while (tr->tr_status != TWA_CMD_COMPLETE)
272		if ((rv = tsleep(tr, PRIBIO, "twaflush", 60 * hz)) != 0)
273			break;
274	twa_release_request(tr);
275	splx(s);
276
277	return (rv);
278}
279
280static void
281ld_twa_adjqparam(device_t self, int openings)
282{
283	struct ld_twa_softc *sc = device_private(self);
284	struct ld_softc *ld = &sc->sc_ld;
285
286	ldadjqparam(ld, openings);
287}
288
289
290static int
291ld_twa_scsicmd(struct ld_twa_softc *sc,
292	struct twa_request *tr, struct buf *bp)
293{
294	if (tr->tr_flags == TWA_CMD_DATA_IN) {
295		tr->tr_command->command.cmd_pkt_9k.cdb[0] = WRITE_16;
296	} else {
297		tr->tr_command->command.cmd_pkt_9k.cdb[0] = READ_16;
298	}
299	tr->tr_command->command.cmd_pkt_9k.cdb[1] =
300		(sc->sc_hwunit << 5);			/* lun for CDB */
301
302	_lto8b(htole64(bp->b_rawblkno),
303		&tr->tr_command->command.cmd_pkt_9k.cdb[2]);
304	_lto4b(htole32((bp->b_bcount / TWA_SECTOR_SIZE)),
305		&tr->tr_command->command.cmd_pkt_9k.cdb[10]);
306
307	tr->tr_command->command.cmd_pkt_9k.cdb[14] = 0;
308	tr->tr_command->command.cmd_pkt_9k.cdb[15] = 0;
309
310	return (0);
311}
312