1 /* $NetBSD: icpsp.c,v 1.29 2024/01/16 21:08:52 andvar Exp $ */
2
3 /*-
4 * Copyright (c) 2002 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Andrew Doran.
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 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: icpsp.c,v 1.29 2024/01/16 21:08:52 andvar Exp $");
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/device.h>
39 #include <sys/queue.h>
40 #include <sys/proc.h>
41 #include <sys/buf.h>
42 #include <sys/endian.h>
43 #include <sys/malloc.h>
44 #include <sys/scsiio.h>
45
46 #include <sys/bswap.h>
47 #include <sys/bus.h>
48
49 #include <dev/scsipi/scsi_all.h>
50 #include <dev/scsipi/scsi_disk.h>
51 #include <dev/scsipi/scsipi_all.h>
52 #include <dev/scsipi/scsiconf.h>
53 #include <dev/scsipi/scsi_message.h>
54
55 #include <dev/ic/icpreg.h>
56 #include <dev/ic/icpvar.h>
57
58 struct icpsp_softc {
59 device_t sc_dv;
60 struct scsipi_adapter sc_adapter;
61 struct scsipi_channel sc_channel;
62 int sc_busno;
63 int sc_openings;
64 };
65
66 void icpsp_attach(device_t, device_t, void *);
67 void icpsp_intr(struct icp_ccb *);
68 int icpsp_match(device_t, cfdata_t, void *);
69 void icpsp_scsipi_request(struct scsipi_channel *, scsipi_adapter_req_t,
70 void *);
71
72 void icpsp_adjqparam(device_t, int);
73
74 CFATTACH_DECL_NEW(icpsp, sizeof(struct icpsp_softc),
75 icpsp_match, icpsp_attach, NULL, NULL);
76
77 static const struct icp_servicecb icpsp_servicecb = {
78 icpsp_adjqparam,
79 };
80
81 int
icpsp_match(device_t parent,cfdata_t match,void * aux)82 icpsp_match(device_t parent, cfdata_t match,
83 void *aux)
84 {
85 struct icp_attach_args *icpa;
86
87 icpa = aux;
88
89 return (icpa->icpa_unit >= ICPA_UNIT_SCSI);
90 }
91
92 void
icpsp_attach(device_t parent,device_t self,void * aux)93 icpsp_attach(device_t parent, device_t self, void *aux)
94 {
95 struct icp_attach_args *icpa;
96 struct icpsp_softc *sc;
97 struct icp_softc *icp;
98
99 icpa = (struct icp_attach_args *)aux;
100 sc = device_private(self);
101 icp = device_private(parent);
102
103 sc->sc_dv = self;
104 sc->sc_busno = icpa->icpa_unit - ICPA_UNIT_SCSI;
105 sc->sc_openings = icp->icp_openings;
106 printf(": physical SCSI channel %d\n", sc->sc_busno);
107
108 icp_register_servicecb(icp, icpa->icpa_unit, &icpsp_servicecb);
109
110 sc->sc_adapter.adapt_dev = sc->sc_dv;
111 sc->sc_adapter.adapt_nchannels = 1;
112 sc->sc_adapter.adapt_openings = icp->icp_openings;
113 sc->sc_adapter.adapt_max_periph = icp->icp_openings;
114 sc->sc_adapter.adapt_minphys = minphys;
115 sc->sc_adapter.adapt_request = icpsp_scsipi_request;
116
117 sc->sc_channel.chan_adapter = &sc->sc_adapter;
118 sc->sc_channel.chan_bustype = &scsi_bustype;
119 sc->sc_channel.chan_channel = 0;
120 sc->sc_channel.chan_ntargets = ((icp->icp_class & ICP_FC) != 0 ?
121 127 : 16); /* XXX bogus check */
122 sc->sc_channel.chan_nluns = 8;
123 sc->sc_channel.chan_id = icp->icp_bus_id[sc->sc_busno];
124 sc->sc_channel.chan_flags = SCSIPI_CHAN_NOSETTLE;
125
126 config_found(self, &sc->sc_channel, scsiprint, CFARGS_NONE);
127 }
128
129 void
icpsp_scsipi_request(struct scsipi_channel * chan,scsipi_adapter_req_t req,void * arg)130 icpsp_scsipi_request(struct scsipi_channel *chan, scsipi_adapter_req_t req,
131 void *arg)
132 {
133 struct scsipi_xfer *xs;
134 struct scsipi_periph *periph;
135 struct icpsp_softc *sc;
136 struct icp_rawcmd *rc;
137 struct icp_softc *icp;
138 struct icp_ccb *ic;
139 int rv, flags, s, soff;
140
141 sc = device_private(chan->chan_adapter->adapt_dev);
142 icp = device_private(device_parent(sc->sc_dv));
143
144 switch (req) {
145 case ADAPTER_REQ_RUN_XFER:
146 xs = arg;
147 periph = xs->xs_periph;
148 flags = xs->xs_control;
149
150 SC_DEBUG(periph, SCSIPI_DB2, ("icpsp_scsi_request run_xfer\n"));
151
152 if ((flags & XS_CTL_RESET) != 0) {
153 /* XXX Unimplemented. */
154 xs->error = XS_DRIVER_STUFFUP;
155 scsipi_done(xs);
156 return;
157 }
158
159 #if defined(ICP_DEBUG) || defined(SCSIDEBUG)
160 if (xs->cmdlen > sizeof(rc->rc_cdb))
161 panic("%s: CDB too large", device_xname(sc->sc_dv));
162 #endif
163
164 /*
165 * Allocate a CCB.
166 */
167 if (__predict_false((ic = icp_ccb_alloc(icp)) == NULL)) {
168 xs->error = XS_RESOURCE_SHORTAGE;
169 scsipi_done(xs);
170 return;
171 }
172 rc = &ic->ic_cmd.cmd_packet.rc;
173 ic->ic_sg = rc->rc_sg;
174 ic->ic_service = ICP_SCSIRAWSERVICE;
175 soff = ICP_SCRATCH_SENSE + ic->ic_ident *
176 sizeof(struct scsi_sense_data);
177
178 /*
179 * Build the command. We don't need to actively prevent
180 * access to array components, since the controller kindly
181 * takes care of that for us.
182 */
183 ic->ic_cmd.cmd_opcode = htole16(ICP_WRITE);
184 memcpy(rc->rc_cdb, xs->cmd, xs->cmdlen);
185
186 rc->rc_padding0 = 0;
187 rc->rc_direction = htole32((flags & XS_CTL_DATA_IN) != 0 ?
188 ICP_DATA_IN : ICP_DATA_OUT);
189 rc->rc_mdisc_time = 0;
190 rc->rc_mcon_time = 0;
191 rc->rc_clen = htole32(xs->cmdlen);
192 rc->rc_target = periph->periph_target;
193 rc->rc_lun = periph->periph_lun;
194 rc->rc_bus = sc->sc_busno;
195 rc->rc_priority = 0;
196 rc->rc_sense_len = htole32(sizeof(xs->sense.scsi_sense));
197 rc->rc_sense_addr =
198 htole32(soff + icp->icp_scr_seg[0].ds_addr);
199 rc->rc_padding1 = 0;
200
201 if (xs->datalen != 0) {
202 rv = icp_ccb_map(icp, ic, xs->data, xs->datalen,
203 (flags & XS_CTL_DATA_IN) != 0 ? IC_XFER_IN :
204 IC_XFER_OUT);
205 if (rv != 0) {
206 icp_ccb_free(icp, ic);
207 xs->error = XS_DRIVER_STUFFUP;
208 scsipi_done(xs);
209 return;
210 }
211
212 rc->rc_nsgent = htole32(ic->ic_nsgent);
213 rc->rc_sdata = ~0;
214 rc->rc_sdlen = htole32(xs->datalen);
215 } else {
216 rc->rc_nsgent = 0;
217 rc->rc_sdata = 0;
218 rc->rc_sdlen = 0;
219 }
220
221 ic->ic_cmdlen = (u_long)ic->ic_sg - (u_long)&ic->ic_cmd +
222 ic->ic_nsgent * sizeof(*ic->ic_sg);
223
224 bus_dmamap_sync(icp->icp_dmat, icp->icp_scr_dmamap, soff,
225 sizeof(xs->sense.scsi_sense), BUS_DMASYNC_PREREAD);
226
227 /*
228 * Fire it off to the controller.
229 */
230 ic->ic_intr = icpsp_intr;
231 ic->ic_context = xs;
232 ic->ic_dv = sc->sc_dv;
233
234 if ((flags & XS_CTL_POLL) != 0) {
235 s = splbio();
236 rv = icp_ccb_poll(icp, ic, xs->timeout);
237 if (rv != 0) {
238 if (xs->datalen != 0)
239 icp_ccb_unmap(icp, ic);
240 icp_ccb_free(icp, ic);
241 xs->error = XS_TIMEOUT;
242 scsipi_done(xs);
243
244 /*
245 * XXX We're now in a bad way, because we
246 * don't know how to abort the command.
247 * That shouldn't matter too much, since
248 * polled commands won't be used while the
249 * system is running.
250 */
251 }
252 splx(s);
253 } else
254 icp_ccb_enqueue(icp, ic);
255
256 break;
257
258 case ADAPTER_REQ_GROW_RESOURCES:
259 case ADAPTER_REQ_SET_XFER_MODE:
260 /*
261 * Neither of these cases are supported, and neither of them
262 * is particularly relevant, since we have an abstract view
263 * of the bus; the controller takes care of all the nitty
264 * gritty.
265 */
266 break;
267 }
268 }
269
270 void
icpsp_intr(struct icp_ccb * ic)271 icpsp_intr(struct icp_ccb *ic)
272 {
273 struct scsipi_xfer *xs;
274 struct icp_softc *icp;
275 int soff;
276
277 #ifdef DIAGNOSTIC
278 struct icpsp_softc *sc = device_private(ic->ic_dv);
279 #endif
280 xs = ic->ic_context;
281 icp = device_private(device_parent(ic->ic_dv));
282 soff = ICP_SCRATCH_SENSE + ic->ic_ident *
283 sizeof(struct scsi_sense_data);
284
285 SC_DEBUG(xs->xs_periph, SCSIPI_DB2, ("icpsp_intr\n"));
286
287 bus_dmamap_sync(icp->icp_dmat, icp->icp_scr_dmamap, soff,
288 sizeof(xs->sense.scsi_sense), BUS_DMASYNC_POSTREAD);
289
290 if (ic->ic_status == ICP_S_OK) {
291 xs->status = SCSI_OK;
292 xs->resid = 0;
293 } else if (ic->ic_status != ICP_S_RAW_SCSI || icp->icp_info >= 0x100) {
294 xs->error = XS_SELTIMEOUT;
295 xs->resid = xs->datalen;
296 } else {
297 xs->status = icp->icp_info;
298
299 switch (xs->status) {
300 case SCSI_OK:
301 #ifdef DIAGNOSTIC
302 printf("%s: error return (%d), but SCSI_OK?\n",
303 device_xname(sc->sc_dv), icp->icp_info);
304 #endif
305 xs->resid = 0;
306 break;
307 case SCSI_CHECK:
308 memcpy(&xs->sense.scsi_sense,
309 (char *)icp->icp_scr + soff,
310 sizeof(xs->sense.scsi_sense));
311 xs->error = XS_SENSE;
312 /* FALLTHROUGH */
313 default:
314 /*
315 * XXX Don't know how to get residual count.
316 */
317 xs->resid = xs->datalen;
318 break;
319 }
320 }
321
322 if (xs->datalen != 0)
323 icp_ccb_unmap(icp, ic);
324 icp_ccb_free(icp, ic);
325 scsipi_done(xs);
326 }
327
328 void
icpsp_adjqparam(device_t self,int openings)329 icpsp_adjqparam(device_t self, int openings)
330 {
331 struct icpsp_softc *sc = device_private(self);
332 int s;
333
334 s = splbio();
335 sc->sc_adapter.adapt_openings += openings - sc->sc_openings;
336 sc->sc_openings = openings;
337 splx(s);
338 }
339