xref: /openbsd-src/sys/dev/usb/umass_scsi.c (revision 99fd087599a8791921855f21bd7e36130f39aadc) 
1 /*	$OpenBSD: umass_scsi.c,v 1.50 2020/02/13 15:11:32 krw Exp $ */
2 /*	$NetBSD: umass_scsipi.c,v 1.9 2003/02/16 23:14:08 augustss Exp $	*/
3 /*
4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * This code is derived from software contributed to The NetBSD Foundation
8  * by Lennart Augustsson (lennart@augustsson.net) at
9  * Carlstedt Research & Technology.
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/param.h>
34 #include <sys/systm.h>
35 #include <sys/kernel.h>
36 #include <sys/conf.h>
37 #include <sys/buf.h>
38 #include <sys/device.h>
39 #include <sys/ioctl.h>
40 #include <sys/malloc.h>
41 
42 #include <dev/usb/usb.h>
43 #include <dev/usb/usbdi.h>
44 #include <dev/usb/usbdi_util.h>
45 
46 #include <dev/usb/umassvar.h>
47 #include <dev/usb/umass_scsi.h>
48 
49 #include <scsi/scsi_all.h>
50 #include <scsi/scsiconf.h>
51 #include <scsi/scsi_disk.h>
52 #include <machine/bus.h>
53 
54 struct umass_scsi_softc {
55 	struct device		*sc_child;
56 	struct scsi_link	sc_link;
57 	struct scsi_iopool	sc_iopool;
58 	int			sc_open;
59 
60 	struct scsi_sense	sc_sense_cmd;
61 };
62 
63 
64 #define UMASS_SCSIID_HOST	0x00
65 #define UMASS_SCSIID_DEVICE	0x01
66 
67 int umass_scsi_probe(struct scsi_link *);
68 void umass_scsi_cmd(struct scsi_xfer *);
69 
70 struct scsi_adapter umass_scsi_switch = {
71 	umass_scsi_cmd, NULL, umass_scsi_probe, NULL, NULL
72 };
73 
74 void umass_scsi_cb(struct umass_softc *sc, void *priv, int residue,
75 		   int status);
76 void umass_scsi_sense_cb(struct umass_softc *sc, void *priv, int residue,
77 			 int status);
78 void *umass_io_get(void *);
79 void umass_io_put(void *, void *);
80 
81 int
82 umass_scsi_attach(struct umass_softc *sc)
83 {
84 	struct scsibus_attach_args saa;
85 	struct umass_scsi_softc *scbus;
86 
87 	scbus = malloc(sizeof(*scbus), M_DEVBUF, M_WAITOK | M_ZERO);
88 
89 	sc->bus = scbus;
90 
91 	scsi_iopool_init(&scbus->sc_iopool, scbus, umass_io_get, umass_io_put);
92 
93 	/* Fill in the link. */
94 	scbus->sc_link.adapter_buswidth = 2;
95 	scbus->sc_link.adapter = &umass_scsi_switch;
96 	scbus->sc_link.adapter_softc = sc;
97 	scbus->sc_link.adapter_target = UMASS_SCSIID_HOST;
98 	scbus->sc_link.openings = 1;
99 	scbus->sc_link.quirks = SDEV_ONLYBIG | sc->sc_busquirks;
100 	scbus->sc_link.pool = &scbus->sc_iopool;
101 	scbus->sc_link.luns = sc->maxlun + 1;
102 	scbus->sc_link.flags = SDEV_UMASS;
103 
104 	bzero(&saa, sizeof(saa));
105 	saa.saa_sc_link = &scbus->sc_link;
106 
107 	switch (sc->sc_cmd) {
108 	case UMASS_CPROTO_RBC:
109 	case UMASS_CPROTO_SCSI:
110 		DPRINTF(UDMASS_USB, ("%s: umass_attach_bus: SCSI\n"
111 				     "sc = 0x%p, scbus = 0x%p\n",
112 				     sc->sc_dev.dv_xname, sc, scbus));
113 		break;
114 	case UMASS_CPROTO_UFI:
115 	case UMASS_CPROTO_ATAPI:
116 		scbus->sc_link.flags |= SDEV_ATAPI;
117 		DPRINTF(UDMASS_USB, ("%s: umass_attach_bus: ATAPI\n"
118 				     "sc = 0x%p, scbus = 0x%p\n",
119 				     sc->sc_dev.dv_xname, sc, scbus));
120 		break;
121 	default:
122 		break;
123 	}
124 
125 	sc->sc_refcnt++;
126 	scbus->sc_child = config_found((struct device *)sc, &saa, scsiprint);
127 	if (--sc->sc_refcnt < 0)
128 		usb_detach_wakeup(&sc->sc_dev);
129 
130 	return (0);
131 }
132 
133 int
134 umass_scsi_detach(struct umass_softc *sc, int flags)
135 {
136 	struct umass_scsi_softc *scbus = sc->bus;
137 	int rv = 0;
138 
139 	if (scbus != NULL) {
140 		if (scbus->sc_child != NULL)
141 			rv = config_detach(scbus->sc_child, flags);
142 		free(scbus, M_DEVBUF, sizeof(*scbus));
143 		sc->bus = NULL;
144 	}
145 
146 	return (rv);
147 }
148 
149 int
150 umass_scsi_probe(struct scsi_link *link)
151 {
152 	struct umass_softc *sc = link->adapter_softc;
153 	struct usb_device_info udi;
154 	size_t len;
155 
156 	/* dont fake devids when more than one scsi device can attach. */
157 	if (sc->maxlun > 0)
158 		return (0);
159 
160 	usbd_fill_deviceinfo(sc->sc_udev, &udi);
161 
162 	/*
163 	 * Create a fake devid using the vendor and product ids and the last
164 	 * 12 characters of serial number, as recommended by Section 4.1.1 of
165 	 * the USB Mass Storage Class - Bulk Only Transport spec.
166 	 */
167 	len = strlen(udi.udi_serial);
168 	if (len >= 12) {
169 		char buf[21];
170 		snprintf(buf, sizeof(buf), "%04x%04x%s", udi.udi_vendorNo,
171 		    udi.udi_productNo, udi.udi_serial + len - 12);
172 		link->id = devid_alloc(DEVID_SERIAL, DEVID_F_PRINT,
173 		    sizeof(buf) - 1, buf);
174 	}
175 
176 	return (0);
177 }
178 
179 void
180 umass_scsi_cmd(struct scsi_xfer *xs)
181 {
182 	struct scsi_link *sc_link = xs->sc_link;
183 	struct umass_softc *sc = sc_link->adapter_softc;
184 	struct scsi_generic *cmd;
185 	int cmdlen, dir;
186 
187 #ifdef UMASS_DEBUG
188 	microtime(&sc->tv);
189 #endif
190 
191 	DIF(UDMASS_UPPER, sc_link->flags |= SCSIDEBUG_LEVEL);
192 
193 	DPRINTF(UDMASS_CMD, ("%s: umass_scsi_cmd: at %lld.%06ld: %d:%d "
194 		"xs=%p cmd=0x%02x datalen=%d (quirks=0x%x, poll=%d)\n",
195 		sc->sc_dev.dv_xname, (long long)sc->tv.tv_sec, sc->tv.tv_usec,
196 		sc_link->target, sc_link->lun, xs, xs->cmd->opcode,
197 		xs->datalen, sc_link->quirks, xs->flags & SCSI_POLL));
198 
199 	if (usbd_is_dying(sc->sc_udev)) {
200 		xs->error = XS_DRIVER_STUFFUP;
201 		goto done;
202 	}
203 
204 #if defined(UMASS_DEBUG)
205 	if (sc_link->target != UMASS_SCSIID_DEVICE) {
206 		DPRINTF(UDMASS_SCSI, ("%s: wrong SCSI ID %d\n",
207 			sc->sc_dev.dv_xname, sc_link->target));
208 		xs->error = XS_DRIVER_STUFFUP;
209 		goto done;
210 	}
211 #endif
212 
213 	cmd = xs->cmd;
214 	cmdlen = xs->cmdlen;
215 
216 	dir = DIR_NONE;
217 	if (xs->datalen) {
218 		switch (xs->flags & (SCSI_DATA_IN | SCSI_DATA_OUT)) {
219 		case SCSI_DATA_IN:
220 			dir = DIR_IN;
221 			break;
222 		case SCSI_DATA_OUT:
223 			dir = DIR_OUT;
224 			break;
225 		}
226 	}
227 
228 	if (xs->datalen > UMASS_MAX_TRANSFER_SIZE) {
229 		printf("umass_cmd: large datalen, %d\n", xs->datalen);
230 		xs->error = XS_DRIVER_STUFFUP;
231 		goto done;
232 	}
233 
234 	if (xs->flags & SCSI_POLL) {
235 		DPRINTF(UDMASS_SCSI, ("umass_scsi_cmd: sync dir=%d\n", dir));
236 		usbd_set_polling(sc->sc_udev, 1);
237 		sc->sc_xfer_flags = USBD_SYNCHRONOUS;
238 		sc->polled_xfer_status = USBD_INVAL;
239 		sc->sc_methods->wire_xfer(sc, sc_link->lun, cmd, cmdlen,
240 					  xs->data, xs->datalen, dir,
241 					  xs->timeout, umass_scsi_cb, xs);
242 		sc->sc_xfer_flags = 0;
243 		DPRINTF(UDMASS_SCSI, ("umass_scsi_cmd: done err=%d\n",
244 				      sc->polled_xfer_status));
245 		usbd_set_polling(sc->sc_udev, 0);
246 		/* scsi_done() has already been called. */
247 		return;
248 	} else {
249 		DPRINTF(UDMASS_SCSI,
250 			("umass_scsi_cmd: async dir=%d, cmdlen=%d"
251 			 " datalen=%d\n",
252 			 dir, cmdlen, xs->datalen));
253 		sc->sc_methods->wire_xfer(sc, sc_link->lun, cmd, cmdlen,
254 					  xs->data, xs->datalen, dir,
255 					  xs->timeout, umass_scsi_cb, xs);
256 		/* scsi_done() has already been called. */
257 		return;
258 	}
259 
260 	/* Return if command finishes early. */
261  done:
262 	scsi_done(xs);
263 }
264 
265 void
266 umass_scsi_cb(struct umass_softc *sc, void *priv, int residue, int status)
267 {
268 	struct umass_scsi_softc *scbus = sc->bus;
269 	struct scsi_xfer *xs = priv;
270 	struct scsi_link *link = xs->sc_link;
271 	int cmdlen;
272 #ifdef UMASS_DEBUG
273 	struct timeval tv;
274 	u_int delta;
275 	microtime(&tv);
276 	delta = (tv.tv_sec - sc->tv.tv_sec) * 1000000 +
277 		tv.tv_usec - sc->tv.tv_usec;
278 #endif
279 
280 	DPRINTF(UDMASS_CMD,
281 		("umass_scsi_cb: at %lld.%06ld, delta=%u: xs=%p residue=%d"
282 		 " status=%d\n", (long long)tv.tv_sec, tv.tv_usec, delta, xs, residue,
283 		 status));
284 
285 	xs->resid = residue;
286 
287 	switch (status) {
288 	case STATUS_CMD_OK:
289 		xs->error = XS_NOERROR;
290 		break;
291 
292 	case STATUS_CMD_UNKNOWN:
293 		DPRINTF(UDMASS_CMD, ("umass_scsi_cb: status cmd unknown\n"));
294 		/* we can't issue REQUEST SENSE */
295 		if (xs->sc_link->quirks & ADEV_NOSENSE) {
296 			/*
297 			 * If no residue and no other USB error,
298 			 * command succeeded.
299 			 */
300 			if (residue == 0) {
301 				xs->error = XS_NOERROR;
302 				break;
303 			}
304 
305 			/*
306 			 * Some devices return a short INQUIRY
307 			 * response, omitting response data from the
308 			 * "vendor specific data" on...
309 			 */
310 			if (xs->cmd->opcode == INQUIRY &&
311 			    residue < xs->datalen) {
312 				xs->error = XS_NOERROR;
313 				break;
314 			}
315 
316 			xs->error = XS_DRIVER_STUFFUP;
317 			break;
318 		}
319 		/* FALLTHROUGH */
320 	case STATUS_CMD_FAILED:
321 		DPRINTF(UDMASS_CMD, ("umass_scsi_cb: status cmd failed for "
322 		    "scsi op 0x%02x\n", xs->cmd->opcode));
323 		/* fetch sense data */
324 		sc->sc_sense = 1;
325 		memset(&scbus->sc_sense_cmd, 0, sizeof(scbus->sc_sense_cmd));
326 		scbus->sc_sense_cmd.opcode = REQUEST_SENSE;
327 		scbus->sc_sense_cmd.byte2 = link->lun << SCSI_CMD_LUN_SHIFT;
328 		scbus->sc_sense_cmd.length = sizeof(xs->sense);
329 
330 		cmdlen = sizeof(scbus->sc_sense_cmd);
331 		if (xs->flags & SCSI_POLL) {
332 			usbd_set_polling(sc->sc_udev, 1);
333 			sc->sc_xfer_flags = USBD_SYNCHRONOUS;
334 			sc->polled_xfer_status = USBD_INVAL;
335 		}
336 		/* scsi_done() has already been called. */
337 		sc->sc_methods->wire_xfer(sc, link->lun,
338 					  &scbus->sc_sense_cmd, cmdlen,
339 					  &xs->sense, sizeof(xs->sense),
340 					  DIR_IN, xs->timeout,
341 					  umass_scsi_sense_cb, xs);
342 		if (xs->flags & SCSI_POLL) {
343 			sc->sc_xfer_flags = 0;
344 			usbd_set_polling(sc->sc_udev, 0);
345 		}
346 		return;
347 
348 	case STATUS_WIRE_FAILED:
349 		xs->error = XS_RESET;
350 		break;
351 
352 	default:
353 		panic("%s: Unknown status %d in umass_scsi_cb",
354 		      sc->sc_dev.dv_xname, status);
355 	}
356 
357 	DPRINTF(UDMASS_CMD,("umass_scsi_cb: at %lld.%06ld: return error=%d, "
358 			    "status=0x%x resid=%zu\n",
359 			    (long long)tv.tv_sec, tv.tv_usec,
360 			    xs->error, xs->status, xs->resid));
361 
362 	if ((xs->flags & SCSI_POLL) && (xs->error == XS_NOERROR)) {
363 		switch (sc->polled_xfer_status) {
364 		case USBD_NORMAL_COMPLETION:
365 			xs->error = XS_NOERROR;
366 			break;
367 		case USBD_TIMEOUT:
368 			xs->error = XS_TIMEOUT;
369 			break;
370 		default:
371 			xs->error = XS_DRIVER_STUFFUP;
372 			break;
373 		}
374 	}
375 
376 	scsi_done(xs);
377 }
378 
379 /*
380  * Finalise a completed autosense operation
381  */
382 void
383 umass_scsi_sense_cb(struct umass_softc *sc, void *priv, int residue,
384 		    int status)
385 {
386 	struct scsi_xfer *xs = priv;
387 
388 	DPRINTF(UDMASS_CMD,("umass_scsi_sense_cb: xs=%p residue=%d "
389 		"status=%d\n", xs, residue, status));
390 
391 	sc->sc_sense = 0;
392 	switch (status) {
393 	case STATUS_CMD_OK:
394 	case STATUS_CMD_UNKNOWN:
395 		/* getting sense data succeeded */
396 		if (residue == 0 || residue == 14)/* XXX */
397 			xs->error = XS_SENSE;
398 		else
399 			xs->error = XS_SHORTSENSE;
400 		break;
401 	default:
402 		DPRINTF(UDMASS_SCSI, ("%s: Autosense failed, status %d\n",
403 			sc->sc_dev.dv_xname, status));
404 		xs->error = XS_DRIVER_STUFFUP;
405 		break;
406 	}
407 
408 	DPRINTF(UDMASS_CMD,("umass_scsi_sense_cb: return xs->error=%d, "
409 		"xs->flags=0x%x xs->resid=%zu\n", xs->error, xs->status,
410 		xs->resid));
411 
412 	if ((xs->flags & SCSI_POLL) && (xs->error == XS_NOERROR)) {
413 		switch (sc->polled_xfer_status) {
414 		case USBD_NORMAL_COMPLETION:
415 			xs->error = XS_NOERROR;
416 			break;
417 		case USBD_TIMEOUT:
418 			xs->error = XS_TIMEOUT;
419 			break;
420 		default:
421 			xs->error = XS_DRIVER_STUFFUP;
422 			break;
423 		}
424 	}
425 
426 	scsi_done(xs);
427 }
428 
429 void *
430 umass_io_get(void *cookie)
431 {
432 	struct umass_scsi_softc *scbus = cookie;
433 	void *io = NULL;
434 	int s;
435 
436 	s = splusb();
437 	if (!scbus->sc_open) {
438 		scbus->sc_open = 1;
439 		io = scbus; /* just has to be non-NULL */
440 	}
441 	splx(s);
442 
443 	return (io);
444 }
445 
446 void
447 umass_io_put(void *cookie, void *io)
448 {
449 	struct umass_scsi_softc *scbus = cookie;
450 	int s;
451 
452 	s = splusb();
453 	scbus->sc_open = 0;
454 	splx(s);
455 }
456