1/*-
2 * Copyright 2007 Scott Long
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
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29
30#include "opt_mfi.h"
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/kernel.h>
35#include <sys/malloc.h>
36#include <sys/module.h>
37#include <sys/selinfo.h>
38#include <sys/bus.h>
39#include <sys/conf.h>
40#include <sys/eventhandler.h>
41#include <sys/rman.h>
42#include <sys/bus_dma.h>
43#include <sys/bio.h>
44#include <sys/ioccom.h>
45#include <sys/uio.h>
46#include <sys/proc.h>
47#include <sys/signalvar.h>
48#include <sys/sysctl.h>
49
50#include <cam/cam.h>
51#include <cam/cam_ccb.h>
52#include <cam/cam_debug.h>
53#include <cam/cam_periph.h>
54#include <cam/cam_sim.h>
55#include <cam/cam_xpt_periph.h>
56#include <cam/cam_xpt_sim.h>
57#include <cam/scsi/scsi_all.h>
58#include <cam/scsi/scsi_message.h>
59
60#include <machine/md_var.h>
61#include <machine/bus.h>
62#include <machine/resource.h>
63
64#include <dev/mfi/mfireg.h>
65#include <dev/mfi/mfi_ioctl.h>
66#include <dev/mfi/mfivar.h>
67
68enum mfip_state {
69 MFIP_STATE_NONE,
70 MFIP_STATE_DETACH,
71 MFIP_STATE_RESCAN
72};
73
74struct mfip_softc {
75 device_t dev;
76 struct mfi_softc *mfi_sc;
77 struct cam_devq *devq;
78 struct cam_sim *sim;
79 struct cam_path *path;
80 enum mfip_state state;
81};
82
83static int mfip_probe(device_t);
84static int mfip_attach(device_t);
85static int mfip_detach(device_t);
86static void mfip_cam_action(struct cam_sim *, union ccb *);
87static void mfip_cam_poll(struct cam_sim *);
88static void mfip_cam_rescan(struct mfi_softc *, uint32_t tid);
89static struct mfi_command * mfip_start(void *);
90static void mfip_done(struct mfi_command *cm);
91
92static int mfi_allow_disks = 0;
93TUNABLE_INT("hw.mfi.allow_cam_disk_passthrough", &mfi_allow_disks);
94SYSCTL_INT(_hw_mfi, OID_AUTO, allow_cam_disk_passthrough, CTLFLAG_RD,
95 &mfi_allow_disks, 0, "event message locale");
96
97static devclass_t mfip_devclass;
98static device_method_t mfip_methods[] = {
99 DEVMETHOD(device_probe, mfip_probe),
100 DEVMETHOD(device_attach, mfip_attach),
101 DEVMETHOD(device_detach, mfip_detach),
102
103 DEVMETHOD_END
104};
105static driver_t mfip_driver = {
106 "mfip",
107 mfip_methods,
108 sizeof(struct mfip_softc)
109};
110DRIVER_MODULE(mfip, mfi, mfip_driver, mfip_devclass, 0, 0);
111MODULE_DEPEND(mfip, cam, 1, 1, 1);
112MODULE_DEPEND(mfip, mfi, 1, 1, 1);
113
114#define ccb_mfip_ptr sim_priv.entries[0].ptr
115
116static int
117mfip_probe(device_t dev)
118{
119
120 device_set_desc(dev, "SCSI Passthrough Bus");
121 return (0);
122}
123
124static int
125mfip_attach(device_t dev)
126{
127 struct mfip_softc *sc;
128 struct mfi_softc *mfisc;
129
130 sc = device_get_softc(dev);
131 if (sc == NULL)
132 return (EINVAL);
133
134 mfisc = device_get_softc(device_get_parent(dev));
135 sc->dev = dev;
136 sc->state = MFIP_STATE_NONE;
137 sc->mfi_sc = mfisc;
138 mfisc->mfi_cam_start = mfip_start;
139
140 if ((sc->devq = cam_simq_alloc(MFI_SCSI_MAX_CMDS)) == NULL)
141 return (ENOMEM);
142
143 sc->sim = cam_sim_alloc(mfip_cam_action, mfip_cam_poll, "mfi", sc,
144 device_get_unit(dev), &mfisc->mfi_io_lock, 1,
145 MFI_SCSI_MAX_CMDS, sc->devq);
146 if (sc->sim == NULL) {
147 cam_simq_free(sc->devq);
148 sc->devq = NULL;
149 device_printf(dev, "CAM SIM attach failed\n");
150 return (EINVAL);
151 }
152
153 mfisc->mfi_cam_rescan_cb = mfip_cam_rescan;
154
155 mtx_lock(&mfisc->mfi_io_lock);
156 if (xpt_bus_register(sc->sim, dev, 0) != 0) {
157 device_printf(dev, "XPT bus registration failed\n");
158 cam_sim_free(sc->sim, FALSE);
159 sc->sim = NULL;
160 cam_simq_free(sc->devq);
161 sc->devq = NULL;
162 mtx_unlock(&mfisc->mfi_io_lock);
163 return (EINVAL);
164 }
165 mtx_unlock(&mfisc->mfi_io_lock);
166
167 return (0);
168}
169
170static int
171mfip_detach(device_t dev)
172{
173 struct mfip_softc *sc;
174
175 sc = device_get_softc(dev);
176 if (sc == NULL)
177 return (EINVAL);
178
179 mtx_lock(&sc->mfi_sc->mfi_io_lock);
180 if (sc->state == MFIP_STATE_RESCAN) {
181 mtx_unlock(&sc->mfi_sc->mfi_io_lock);
182 return (EBUSY);
183 }
184 sc->state = MFIP_STATE_DETACH;
185 mtx_unlock(&sc->mfi_sc->mfi_io_lock);
186
187 sc->mfi_sc->mfi_cam_rescan_cb = NULL;
188
189 if (sc->sim != NULL) {
190 mtx_lock(&sc->mfi_sc->mfi_io_lock);
191 xpt_bus_deregister(cam_sim_path(sc->sim));
192 cam_sim_free(sc->sim, FALSE);
193 sc->sim = NULL;
194 mtx_unlock(&sc->mfi_sc->mfi_io_lock);
195 }
196
197 if (sc->devq != NULL) {
198 cam_simq_free(sc->devq);
199 sc->devq = NULL;
200 }
201
202 return (0);
203}
204
205static void
206mfip_cam_action(struct cam_sim *sim, union ccb *ccb)
207{
208 struct mfip_softc *sc = cam_sim_softc(sim);
209 struct mfi_softc *mfisc = sc->mfi_sc;
210
211 mtx_assert(&mfisc->mfi_io_lock, MA_OWNED);
212
213 switch (ccb->ccb_h.func_code) {
214 case XPT_PATH_INQ:
215 {
216 struct ccb_pathinq *cpi = &ccb->cpi;
217
218 cpi->version_num = 1;
219 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16;
220 cpi->target_sprt = 0;
221 cpi->hba_misc = PIM_NOBUSRESET|PIM_SEQSCAN;
222 cpi->hba_eng_cnt = 0;
223 cpi->max_target = MFI_SCSI_MAX_TARGETS;
224 cpi->max_lun = MFI_SCSI_MAX_LUNS;
225 cpi->initiator_id = MFI_SCSI_INITIATOR_ID;
226 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
227 strncpy(cpi->hba_vid, "LSI", HBA_IDLEN);
228 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
229 cpi->unit_number = cam_sim_unit(sim);
230 cpi->bus_id = cam_sim_bus(sim);
231 cpi->base_transfer_speed = 150000;
232 cpi->transport = XPORT_SAS;
233 cpi->transport_version = 0;
234 cpi->protocol = PROTO_SCSI;
235 cpi->protocol_version = SCSI_REV_2;
236 cpi->ccb_h.status = CAM_REQ_CMP;
237 break;
238 }
239 case XPT_RESET_BUS:
240 ccb->ccb_h.status = CAM_REQ_CMP;
241 break;
242 case XPT_RESET_DEV:
243 ccb->ccb_h.status = CAM_REQ_CMP;
244 break;
245 case XPT_GET_TRAN_SETTINGS:
246 {
247 struct ccb_trans_settings_sas *sas =
248 &ccb->cts.xport_specific.sas;
249
250 ccb->cts.protocol = PROTO_SCSI;
251 ccb->cts.protocol_version = SCSI_REV_2;
252 ccb->cts.transport = XPORT_SAS;
253 ccb->cts.transport_version = 0;
254
255 sas->valid &= ~CTS_SAS_VALID_SPEED;
256 sas->bitrate = 150000;
257
258 ccb->ccb_h.status = CAM_REQ_CMP;
259 break;
260 }
261 case XPT_SET_TRAN_SETTINGS:
262 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
263 break;
264 case XPT_SCSI_IO:
265 {
266 struct ccb_hdr *ccbh = &ccb->ccb_h;
267 struct ccb_scsiio *csio = &ccb->csio;
268
269 ccbh->status = CAM_REQ_INPROG;
270 if (csio->cdb_len > MFI_SCSI_MAX_CDB_LEN) {
271 ccbh->status = CAM_REQ_INVALID;
272 break;
273 }
274 ccbh->ccb_mfip_ptr = sc;
275 TAILQ_INSERT_TAIL(&mfisc->mfi_cam_ccbq, ccbh, sim_links.tqe);
276 mfi_startio(mfisc);
277 return;
278 }
279 default:
280 ccb->ccb_h.status = CAM_REQ_INVALID;
281 break;
282 }
283
284 xpt_done(ccb);
285 return;
286}
287
288static void
289mfip_cam_rescan(struct mfi_softc *sc, uint32_t tid)
290{
291 union ccb *ccb;
292 struct mfip_softc *camsc;
293 struct cam_sim *sim;
294 device_t mfip_dev;
295
296 mtx_lock(&Giant);
297 mfip_dev = device_find_child(sc->mfi_dev, "mfip", -1);
298 mtx_unlock(&Giant);
299 if (mfip_dev == NULL) {
300 device_printf(sc->mfi_dev, "Couldn't find mfip child device!\n");
301 return;
302 }
303
304 mtx_lock(&sc->mfi_io_lock);
305 camsc = device_get_softc(mfip_dev);
306 if (camsc->state == MFIP_STATE_DETACH) {
307 mtx_unlock(&sc->mfi_io_lock);
308 return;
309 }
310 camsc->state = MFIP_STATE_RESCAN;
311 mtx_unlock(&sc->mfi_io_lock);
312
313 ccb = xpt_alloc_ccb_nowait();
314 if (ccb == NULL) {
315 device_printf(sc->mfi_dev,
316 "Cannot allocate ccb for bus rescan.\n");
317 return;
318 }
319
320 sim = camsc->sim;
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331
332 xpt_rescan(ccb);
333
334 mtx_lock(&sc->mfi_io_lock);
335 camsc->state = MFIP_STATE_NONE;
336 mtx_unlock(&sc->mfi_io_lock);
337}
338
339static struct mfi_command *
340mfip_start(void *data)
341{
342 union ccb *ccb = data;
343 struct ccb_hdr *ccbh = &ccb->ccb_h;
344 struct ccb_scsiio *csio = &ccb->csio;
345 struct mfip_softc *sc;
346 struct mfi_pass_frame *pt;
347 struct mfi_command *cm;
348 uint32_t context = 0;
349
350 sc = ccbh->ccb_mfip_ptr;
351
352 if ((cm = mfi_dequeue_free(sc->mfi_sc)) == NULL)
353 return (NULL);
354
355 /* Zero out the MFI frame */
356 context = cm->cm_frame->header.context;
357 bzero(cm->cm_frame, sizeof(union mfi_frame));
358 cm->cm_frame->header.context = context;
359
360 pt = &cm->cm_frame->pass;
361 pt->header.cmd = MFI_CMD_PD_SCSI_IO;
362 pt->header.cmd_status = 0;
363 pt->header.scsi_status = 0;
364 pt->header.target_id = ccbh->target_id;
365 pt->header.lun_id = ccbh->target_lun;
366 pt->header.flags = 0;
367 pt->header.timeout = 0;
368 pt->header.data_len = csio->dxfer_len;
369 pt->header.sense_len = MFI_SENSE_LEN;
370 pt->header.cdb_len = csio->cdb_len;
371 pt->sense_addr_lo = (uint32_t)cm->cm_sense_busaddr;
372 pt->sense_addr_hi = (uint32_t)((uint64_t)cm->cm_sense_busaddr >> 32);
373 if (ccbh->flags & CAM_CDB_POINTER)
374 bcopy(csio->cdb_io.cdb_ptr, &pt->cdb[0], csio->cdb_len);
375 else
376 bcopy(csio->cdb_io.cdb_bytes, &pt->cdb[0], csio->cdb_len);
377 cm->cm_complete = mfip_done;
378 cm->cm_private = ccb;
379 cm->cm_sg = &pt->sgl;
380 cm->cm_total_frame_size = MFI_PASS_FRAME_SIZE;
381 cm->cm_data = ccb;
382 cm->cm_len = csio->dxfer_len;
383 switch (ccbh->flags & CAM_DIR_MASK) {
384 case CAM_DIR_IN:
385 cm->cm_flags = MFI_CMD_DATAIN | MFI_CMD_CCB;
386 break;
387 case CAM_DIR_OUT:
388 cm->cm_flags = MFI_CMD_DATAOUT | MFI_CMD_CCB;
389 break;
390 case CAM_DIR_NONE:
391 default:
392 cm->cm_data = NULL;
393 cm->cm_len = 0;
394 cm->cm_flags = 0;
395 break;
396 }
397
398 TAILQ_REMOVE(&sc->mfi_sc->mfi_cam_ccbq, ccbh, sim_links.tqe);
399 return (cm);
400}
401
402static void
403mfip_done(struct mfi_command *cm)
404{
405 union ccb *ccb = cm->cm_private;
406 struct ccb_hdr *ccbh = &ccb->ccb_h;
407 struct ccb_scsiio *csio = &ccb->csio;
408 struct mfip_softc *sc;
409 struct mfi_pass_frame *pt;
410
411 sc = ccbh->ccb_mfip_ptr;
412 pt = &cm->cm_frame->pass;
413
414 switch (pt->header.cmd_status) {
415 case MFI_STAT_OK:
416 {
417 uint8_t command, device;
418
419 ccbh->status = CAM_REQ_CMP;
420 csio->scsi_status = pt->header.scsi_status;
421 if (ccbh->flags & CAM_CDB_POINTER)
422 command = csio->cdb_io.cdb_ptr[0];
423 else
424 command = csio->cdb_io.cdb_bytes[0];
425 if (command == INQUIRY) {
426 device = csio->data_ptr[0] & 0x1f;
427 if ((!mfi_allow_disks && device == T_DIRECT) ||
428 (device == T_PROCESSOR))
429 csio->data_ptr[0] =
430 (csio->data_ptr[0] & 0xe0) | T_NODEVICE;
431 }
432 break;
433 }
434 case MFI_STAT_SCSI_DONE_WITH_ERROR:
435 {
436 int sense_len;
437
438 ccbh->status = CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID;
439 csio->scsi_status = pt->header.scsi_status;
440 if (pt->header.sense_len < csio->sense_len)
441 csio->sense_resid = csio->sense_len -
442 pt->header.sense_len;
443 else
444 csio->sense_resid = 0;
445 sense_len = min(pt->header.sense_len,
446 sizeof(struct scsi_sense_data));
447 bzero(&csio->sense_data, sizeof(struct scsi_sense_data));
448 bcopy(&cm->cm_sense->data[0], &csio->sense_data, sense_len);
449 break;
450 }
451 case MFI_STAT_DEVICE_NOT_FOUND:
452 ccbh->status = CAM_SEL_TIMEOUT;
453 break;
454 case MFI_STAT_SCSI_IO_FAILED:
455 ccbh->status = CAM_REQ_CMP_ERR;
456 csio->scsi_status = pt->header.scsi_status;
457 break;
458 default:
459 ccbh->status = CAM_REQ_CMP_ERR;
460 csio->scsi_status = pt->header.scsi_status;
461 break;
462 }
463
464 mfi_release_command(cm);
465 xpt_done(ccb);
466}
467
468static void
469mfip_cam_poll(struct cam_sim *sim)
470{
471 struct mfip_softc *sc = cam_sim_softc(sim);
472 struct mfi_softc *mfisc = sc->mfi_sc;
473
474 mfisc->mfi_intr_ptr(mfisc);
475}
476
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