FreeBSD/Linux Kernel Cross Reference
sys/dev/mfi/mfi_cam.c
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>
28 __FBSDID("$FreeBSD$");
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
68 enum mfip_state {
69 MFIP_STATE_NONE,
70 MFIP_STATE_DETACH,
71 MFIP_STATE_RESCAN
72 };
73
74 struct 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
83 static int mfip_probe(device_t);
84 static int mfip_attach(device_t);
85 static int mfip_detach(device_t);
86 static void mfip_cam_action(struct cam_sim *, union ccb *);
87 static void mfip_cam_poll(struct cam_sim *);
88 static void mfip_cam_rescan(struct mfi_softc *, uint32_t tid);
89 static struct mfi_command * mfip_start(void *);
90 static void mfip_done(struct mfi_command *cm);
91
92 static int mfi_allow_disks = 0;
93 TUNABLE_INT("hw.mfi.allow_cam_disk_passthrough", &mfi_allow_disks);
94 SYSCTL_INT(_hw_mfi, OID_AUTO, allow_cam_disk_passthrough, CTLFLAG_RD,
95 &mfi_allow_disks, 0, "event message locale");
96
97 static devclass_t mfip_devclass;
98 static 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 };
105 static driver_t mfip_driver = {
106 "mfip",
107 mfip_methods,
108 sizeof(struct mfip_softc)
109 };
110 DRIVER_MODULE(mfip, mfi, mfip_driver, mfip_devclass, 0, 0);
111 MODULE_DEPEND(mfip, cam, 1, 1, 1);
112 MODULE_DEPEND(mfip, mfi, 1, 1, 1);
113
114 #define ccb_mfip_ptr sim_priv.entries[0].ptr
115
116 static int
117 mfip_probe(device_t dev)
118 {
119
120 device_set_desc(dev, "SCSI Passthrough Bus");
121 return (0);
122 }
123
124 static int
125 mfip_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
170 static int
171 mfip_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
205 static void
206 mfip_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_TAG_ABLE;
220 cpi->target_sprt = 0;
221 cpi->hba_misc = PIM_NOBUSRESET | PIM_SEQSCAN | PIM_UNMAPPED;
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 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
227 strlcpy(cpi->hba_vid, "LSI", HBA_IDLEN);
228 strlcpy(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_scsi *scsi =
248 &ccb->cts.proto_specific.scsi;
249 struct ccb_trans_settings_sas *sas =
250 &ccb->cts.xport_specific.sas;
251
252 ccb->cts.protocol = PROTO_SCSI;
253 ccb->cts.protocol_version = SCSI_REV_2;
254 ccb->cts.transport = XPORT_SAS;
255 ccb->cts.transport_version = 0;
256
257 scsi->valid = CTS_SCSI_VALID_TQ;
258 scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;
259
260 sas->valid &= ~CTS_SAS_VALID_SPEED;
261 sas->bitrate = 150000;
262
263 ccb->ccb_h.status = CAM_REQ_CMP;
264 break;
265 }
266 case XPT_SET_TRAN_SETTINGS:
267 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
268 break;
269 case XPT_SCSI_IO:
270 {
271 struct ccb_hdr *ccbh = &ccb->ccb_h;
272 struct ccb_scsiio *csio = &ccb->csio;
273
274 ccbh->status = CAM_REQ_INPROG;
275 if (csio->cdb_len > MFI_SCSI_MAX_CDB_LEN) {
276 ccbh->status = CAM_REQ_INVALID;
277 break;
278 }
279 ccbh->ccb_mfip_ptr = sc;
280 TAILQ_INSERT_TAIL(&mfisc->mfi_cam_ccbq, ccbh, sim_links.tqe);
281 mfi_startio(mfisc);
282 return;
283 }
284 default:
285 ccb->ccb_h.status = CAM_REQ_INVALID;
286 break;
287 }
288
289 xpt_done(ccb);
290 return;
291 }
292
293 static void
294 mfip_cam_rescan(struct mfi_softc *sc, uint32_t tid)
295 {
296 union ccb *ccb;
297 struct mfip_softc *camsc;
298 struct cam_sim *sim;
299 device_t mfip_dev;
300
301 mtx_lock(&Giant);
302 mfip_dev = device_find_child(sc->mfi_dev, "mfip", -1);
303 mtx_unlock(&Giant);
304 if (mfip_dev == NULL) {
305 device_printf(sc->mfi_dev, "Couldn't find mfip child device!\n");
306 return;
307 }
308
309 mtx_lock(&sc->mfi_io_lock);
310 camsc = device_get_softc(mfip_dev);
311 if (camsc->state == MFIP_STATE_DETACH) {
312 mtx_unlock(&sc->mfi_io_lock);
313 return;
314 }
315 camsc->state = MFIP_STATE_RESCAN;
316
317 ccb = xpt_alloc_ccb_nowait();
318 if (ccb == NULL) {
319 mtx_unlock(&sc->mfi_io_lock);
320 device_printf(sc->mfi_dev,
321 "Cannot allocate ccb for bus rescan.\n");
322 return;
323 }
324
325 sim = camsc->sim;
326 if (xpt_create_path(&ccb->ccb_h.path, NULL, cam_sim_path(sim),
327 tid, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
328 xpt_free_ccb(ccb);
329 mtx_unlock(&sc->mfi_io_lock);
330 device_printf(sc->mfi_dev,
331 "Cannot create path for bus rescan.\n");
332 return;
333 }
334 xpt_rescan(ccb);
335
336 camsc->state = MFIP_STATE_NONE;
337 mtx_unlock(&sc->mfi_io_lock);
338 }
339
340 static struct mfi_command *
341 mfip_start(void *data)
342 {
343 union ccb *ccb = data;
344 struct ccb_hdr *ccbh = &ccb->ccb_h;
345 struct ccb_scsiio *csio = &ccb->csio;
346 struct mfip_softc *sc;
347 struct mfi_pass_frame *pt;
348 struct mfi_command *cm;
349 uint32_t context = 0;
350
351 sc = ccbh->ccb_mfip_ptr;
352
353 if ((cm = mfi_dequeue_free(sc->mfi_sc)) == NULL)
354 return (NULL);
355
356 /* Zero out the MFI frame */
357 context = cm->cm_frame->header.context;
358 bzero(cm->cm_frame, sizeof(union mfi_frame));
359 cm->cm_frame->header.context = context;
360
361 pt = &cm->cm_frame->pass;
362 pt->header.cmd = MFI_CMD_PD_SCSI_IO;
363 pt->header.cmd_status = 0;
364 pt->header.scsi_status = 0;
365 pt->header.target_id = ccbh->target_id;
366 pt->header.lun_id = ccbh->target_lun;
367 pt->header.flags = 0;
368 pt->header.timeout = 0;
369 pt->header.data_len = csio->dxfer_len;
370 pt->header.sense_len = MFI_SENSE_LEN;
371 pt->header.cdb_len = csio->cdb_len;
372 pt->sense_addr_lo = (uint32_t)cm->cm_sense_busaddr;
373 pt->sense_addr_hi = (uint32_t)((uint64_t)cm->cm_sense_busaddr >> 32);
374 if (ccbh->flags & CAM_CDB_POINTER)
375 bcopy(csio->cdb_io.cdb_ptr, &pt->cdb[0], csio->cdb_len);
376 else
377 bcopy(csio->cdb_io.cdb_bytes, &pt->cdb[0], csio->cdb_len);
378 cm->cm_complete = mfip_done;
379 cm->cm_private = ccb;
380 cm->cm_sg = &pt->sgl;
381 cm->cm_total_frame_size = MFI_PASS_FRAME_SIZE;
382 cm->cm_data = ccb;
383 cm->cm_len = csio->dxfer_len;
384 switch (ccbh->flags & CAM_DIR_MASK) {
385 case CAM_DIR_IN:
386 cm->cm_flags = MFI_CMD_DATAIN | MFI_CMD_CCB;
387 break;
388 case CAM_DIR_OUT:
389 cm->cm_flags = MFI_CMD_DATAOUT | MFI_CMD_CCB;
390 break;
391 case CAM_DIR_NONE:
392 default:
393 cm->cm_data = NULL;
394 cm->cm_len = 0;
395 cm->cm_flags = 0;
396 break;
397 }
398
399 TAILQ_REMOVE(&sc->mfi_sc->mfi_cam_ccbq, ccbh, sim_links.tqe);
400 return (cm);
401 }
402
403 static void
404 mfip_done(struct mfi_command *cm)
405 {
406 union ccb *ccb = cm->cm_private;
407 struct ccb_hdr *ccbh = &ccb->ccb_h;
408 struct ccb_scsiio *csio = &ccb->csio;
409 struct mfip_softc *sc;
410 struct mfi_pass_frame *pt;
411
412 sc = ccbh->ccb_mfip_ptr;
413 pt = &cm->cm_frame->pass;
414
415 switch (pt->header.cmd_status) {
416 case MFI_STAT_OK:
417 {
418 uint8_t command, device;
419
420 ccbh->status = CAM_REQ_CMP;
421 csio->scsi_status = pt->header.scsi_status;
422 if (ccbh->flags & CAM_CDB_POINTER)
423 command = csio->cdb_io.cdb_ptr[0];
424 else
425 command = csio->cdb_io.cdb_bytes[0];
426 if (command == INQUIRY) {
427 device = csio->data_ptr[0] & 0x1f;
428 if ((!mfi_allow_disks && device == T_DIRECT) ||
429 (device == T_PROCESSOR))
430 csio->data_ptr[0] =
431 (csio->data_ptr[0] & 0xe0) | T_NODEVICE;
432 }
433 break;
434 }
435 case MFI_STAT_SCSI_DONE_WITH_ERROR:
436 {
437 int sense_len;
438
439 ccbh->status = CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID;
440 csio->scsi_status = pt->header.scsi_status;
441 if (pt->header.sense_len < csio->sense_len)
442 csio->sense_resid = csio->sense_len -
443 pt->header.sense_len;
444 else
445 csio->sense_resid = 0;
446 sense_len = min(pt->header.sense_len,
447 sizeof(struct scsi_sense_data));
448 bzero(&csio->sense_data, sizeof(struct scsi_sense_data));
449 bcopy(&cm->cm_sense->data[0], &csio->sense_data, sense_len);
450 break;
451 }
452 case MFI_STAT_DEVICE_NOT_FOUND:
453 ccbh->status = CAM_SEL_TIMEOUT;
454 break;
455 case MFI_STAT_SCSI_IO_FAILED:
456 ccbh->status = CAM_REQ_CMP_ERR;
457 csio->scsi_status = pt->header.scsi_status;
458 break;
459 default:
460 ccbh->status = CAM_REQ_CMP_ERR;
461 csio->scsi_status = pt->header.scsi_status;
462 break;
463 }
464
465 mfi_release_command(cm);
466 xpt_done(ccb);
467 }
468
469 static void
470 mfip_cam_poll(struct cam_sim *sim)
471 {
472 struct mfip_softc *sc = cam_sim_softc(sim);
473 struct mfi_softc *mfisc = sc->mfi_sc;
474
475 mfisc->mfi_intr_ptr(mfisc);
476 }
477
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