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 {0, 0}
103 };
104 static driver_t mfip_driver = {
105 "mfip",
106 mfip_methods,
107 sizeof(struct mfip_softc)
108 };
109 DRIVER_MODULE(mfip, mfi, mfip_driver, mfip_devclass, 0, 0);
110 MODULE_DEPEND(mfip, cam, 1, 1, 1);
111 MODULE_DEPEND(mfip, mfi, 1, 1, 1);
112
113 #define ccb_mfip_ptr sim_priv.entries[0].ptr
114
115 static int
116 mfip_probe(device_t dev)
117 {
118
119 device_set_desc(dev, "SCSI Passthrough Bus");
120 return (0);
121 }
122
123 static int
124 mfip_attach(device_t dev)
125 {
126 struct mfip_softc *sc;
127 struct mfi_softc *mfisc;
128
129 sc = device_get_softc(dev);
130 if (sc == NULL)
131 return (EINVAL);
132
133 mfisc = device_get_softc(device_get_parent(dev));
134 sc->dev = dev;
135 sc->state = MFIP_STATE_NONE;
136 sc->mfi_sc = mfisc;
137 mfisc->mfi_cam_start = mfip_start;
138
139 if ((sc->devq = cam_simq_alloc(MFI_SCSI_MAX_CMDS)) == NULL)
140 return (ENOMEM);
141
142 sc->sim = cam_sim_alloc(mfip_cam_action, mfip_cam_poll, "mfi", sc,
143 device_get_unit(dev), &mfisc->mfi_io_lock, 1,
144 MFI_SCSI_MAX_CMDS, sc->devq);
145 if (sc->sim == NULL) {
146 cam_simq_free(sc->devq);
147 sc->devq = NULL;
148 device_printf(dev, "CAM SIM attach failed\n");
149 return (EINVAL);
150 }
151
152 mfisc->mfi_cam_rescan_cb = mfip_cam_rescan;
153
154 mtx_lock(&mfisc->mfi_io_lock);
155 if (xpt_bus_register(sc->sim, dev, 0) != 0) {
156 device_printf(dev, "XPT bus registration failed\n");
157 cam_sim_free(sc->sim, FALSE);
158 sc->sim = NULL;
159 cam_simq_free(sc->devq);
160 sc->devq = NULL;
161 mtx_unlock(&mfisc->mfi_io_lock);
162 return (EINVAL);
163 }
164 mtx_unlock(&mfisc->mfi_io_lock);
165
166 return (0);
167 }
168
169 static int
170 mfip_detach(device_t dev)
171 {
172 struct mfip_softc *sc;
173
174 sc = device_get_softc(dev);
175 if (sc == NULL)
176 return (EINVAL);
177
178 mtx_lock(&sc->mfi_sc->mfi_io_lock);
179 if (sc->state == MFIP_STATE_RESCAN) {
180 mtx_unlock(&sc->mfi_sc->mfi_io_lock);
181 return (EBUSY);
182 }
183 sc->state = MFIP_STATE_DETACH;
184 mtx_unlock(&sc->mfi_sc->mfi_io_lock);
185
186 sc->mfi_sc->mfi_cam_rescan_cb = NULL;
187
188 if (sc->sim != NULL) {
189 mtx_lock(&sc->mfi_sc->mfi_io_lock);
190 xpt_bus_deregister(cam_sim_path(sc->sim));
191 cam_sim_free(sc->sim, FALSE);
192 sc->sim = NULL;
193 mtx_unlock(&sc->mfi_sc->mfi_io_lock);
194 }
195
196 if (sc->devq != NULL) {
197 cam_simq_free(sc->devq);
198 sc->devq = NULL;
199 }
200
201 return (0);
202 }
203
204 static void
205 mfip_cam_action(struct cam_sim *sim, union ccb *ccb)
206 {
207 struct mfip_softc *sc = cam_sim_softc(sim);
208 struct mfi_softc *mfisc = sc->mfi_sc;
209
210 mtx_assert(&mfisc->mfi_io_lock, MA_OWNED);
211
212 switch (ccb->ccb_h.func_code) {
213 case XPT_PATH_INQ:
214 {
215 struct ccb_pathinq *cpi = &ccb->cpi;
216
217 cpi->version_num = 1;
218 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16;
219 cpi->target_sprt = 0;
220 cpi->hba_misc = PIM_NOBUSRESET|PIM_SEQSCAN;
221 cpi->hba_eng_cnt = 0;
222 cpi->max_target = MFI_SCSI_MAX_TARGETS;
223 cpi->max_lun = MFI_SCSI_MAX_LUNS;
224 cpi->initiator_id = MFI_SCSI_INITIATOR_ID;
225 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
226 strncpy(cpi->hba_vid, "LSI", HBA_IDLEN);
227 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
228 cpi->unit_number = cam_sim_unit(sim);
229 cpi->bus_id = cam_sim_bus(sim);
230 cpi->base_transfer_speed = 150000;
231 cpi->transport = XPORT_SAS;
232 cpi->transport_version = 0;
233 cpi->protocol = PROTO_SCSI;
234 cpi->protocol_version = SCSI_REV_2;
235 cpi->ccb_h.status = CAM_REQ_CMP;
236 break;
237 }
238 case XPT_RESET_BUS:
239 ccb->ccb_h.status = CAM_REQ_CMP;
240 break;
241 case XPT_RESET_DEV:
242 ccb->ccb_h.status = CAM_REQ_CMP;
243 break;
244 case XPT_GET_TRAN_SETTINGS:
245 {
246 struct ccb_trans_settings_sas *sas =
247 &ccb->cts.xport_specific.sas;
248
249 ccb->cts.protocol = PROTO_SCSI;
250 ccb->cts.protocol_version = SCSI_REV_2;
251 ccb->cts.transport = XPORT_SAS;
252 ccb->cts.transport_version = 0;
253
254 sas->valid &= ~CTS_SAS_VALID_SPEED;
255 sas->bitrate = 150000;
256
257 ccb->ccb_h.status = CAM_REQ_CMP;
258 break;
259 }
260 case XPT_SET_TRAN_SETTINGS:
261 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
262 break;
263 case XPT_SCSI_IO:
264 {
265 struct ccb_hdr *ccbh = &ccb->ccb_h;
266 struct ccb_scsiio *csio = &ccb->csio;
267
268 ccbh->status = CAM_REQ_INPROG;
269 if (csio->cdb_len > MFI_SCSI_MAX_CDB_LEN) {
270 ccbh->status = CAM_REQ_INVALID;
271 break;
272 }
273 ccbh->ccb_mfip_ptr = sc;
274 TAILQ_INSERT_TAIL(&mfisc->mfi_cam_ccbq, ccbh, sim_links.tqe);
275 mfi_startio(mfisc);
276 return;
277 }
278 default:
279 ccb->ccb_h.status = CAM_REQ_INVALID;
280 break;
281 }
282
283 xpt_done(ccb);
284 return;
285 }
286
287 static void
288 mfip_cam_rescan(struct mfi_softc *sc, uint32_t tid)
289 {
290 union ccb *ccb;
291 struct mfip_softc *camsc;
292 struct cam_sim *sim;
293 device_t mfip_dev;
294
295 mtx_lock(&Giant);
296 mfip_dev = device_find_child(sc->mfi_dev, "mfip", -1);
297 mtx_unlock(&Giant);
298 if (mfip_dev == NULL) {
299 device_printf(sc->mfi_dev, "Couldn't find mfip child device!\n");
300 return;
301 }
302
303 mtx_lock(&sc->mfi_io_lock);
304 camsc = device_get_softc(mfip_dev);
305 if (camsc->state == MFIP_STATE_DETACH) {
306 mtx_unlock(&sc->mfi_io_lock);
307 return;
308 }
309 camsc->state = MFIP_STATE_RESCAN;
310
311 ccb = xpt_alloc_ccb_nowait();
312 if (ccb == NULL) {
313 mtx_unlock(&sc->mfi_io_lock);
314 device_printf(sc->mfi_dev,
315 "Cannot allocate ccb for bus rescan.\n");
316 return;
317 }
318
319 sim = camsc->sim;
320 if (xpt_create_path(&ccb->ccb_h.path, NULL, cam_sim_path(sim),
321 tid, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
322 xpt_free_ccb(ccb);
323 mtx_unlock(&sc->mfi_io_lock);
324 device_printf(sc->mfi_dev,
325 "Cannot create path for bus rescan.\n");
326 return;
327 }
328 xpt_rescan(ccb);
329
330 camsc->state = MFIP_STATE_NONE;
331 mtx_unlock(&sc->mfi_io_lock);
332 }
333
334 static struct mfi_command *
335 mfip_start(void *data)
336 {
337 union ccb *ccb = data;
338 struct ccb_hdr *ccbh = &ccb->ccb_h;
339 struct ccb_scsiio *csio = &ccb->csio;
340 struct mfip_softc *sc;
341 struct mfi_pass_frame *pt;
342 struct mfi_command *cm;
343 uint32_t context = 0;
344
345 sc = ccbh->ccb_mfip_ptr;
346
347 if ((cm = mfi_dequeue_free(sc->mfi_sc)) == NULL)
348 return (NULL);
349
350 /* Zero out the MFI frame */
351 context = cm->cm_frame->header.context;
352 bzero(cm->cm_frame, sizeof(union mfi_frame));
353 cm->cm_frame->header.context = context;
354
355 pt = &cm->cm_frame->pass;
356 pt->header.cmd = MFI_CMD_PD_SCSI_IO;
357 pt->header.cmd_status = 0;
358 pt->header.scsi_status = 0;
359 pt->header.target_id = ccbh->target_id;
360 pt->header.lun_id = ccbh->target_lun;
361 pt->header.flags = 0;
362 pt->header.timeout = 0;
363 pt->header.data_len = csio->dxfer_len;
364 pt->header.sense_len = MFI_SENSE_LEN;
365 pt->header.cdb_len = csio->cdb_len;
366 pt->sense_addr_lo = (uint32_t)cm->cm_sense_busaddr;
367 pt->sense_addr_hi = (uint32_t)((uint64_t)cm->cm_sense_busaddr >> 32);
368 if (ccbh->flags & CAM_CDB_POINTER)
369 bcopy(csio->cdb_io.cdb_ptr, &pt->cdb[0], csio->cdb_len);
370 else
371 bcopy(csio->cdb_io.cdb_bytes, &pt->cdb[0], csio->cdb_len);
372 cm->cm_complete = mfip_done;
373 cm->cm_private = ccb;
374 cm->cm_sg = &pt->sgl;
375 cm->cm_total_frame_size = MFI_PASS_FRAME_SIZE;
376 cm->cm_data = ccb;
377 cm->cm_len = csio->dxfer_len;
378 switch (ccbh->flags & CAM_DIR_MASK) {
379 case CAM_DIR_IN:
380 cm->cm_flags = MFI_CMD_DATAIN | MFI_CMD_CCB;
381 break;
382 case CAM_DIR_OUT:
383 cm->cm_flags = MFI_CMD_DATAOUT | MFI_CMD_CCB;
384 break;
385 case CAM_DIR_NONE:
386 default:
387 cm->cm_data = NULL;
388 cm->cm_len = 0;
389 cm->cm_flags = 0;
390 break;
391 }
392
393 TAILQ_REMOVE(&sc->mfi_sc->mfi_cam_ccbq, ccbh, sim_links.tqe);
394 return (cm);
395 }
396
397 static void
398 mfip_done(struct mfi_command *cm)
399 {
400 union ccb *ccb = cm->cm_private;
401 struct ccb_hdr *ccbh = &ccb->ccb_h;
402 struct ccb_scsiio *csio = &ccb->csio;
403 struct mfip_softc *sc;
404 struct mfi_pass_frame *pt;
405
406 sc = ccbh->ccb_mfip_ptr;
407 pt = &cm->cm_frame->pass;
408
409 switch (pt->header.cmd_status) {
410 case MFI_STAT_OK:
411 {
412 uint8_t command, device;
413
414 ccbh->status = CAM_REQ_CMP;
415 csio->scsi_status = pt->header.scsi_status;
416 if (ccbh->flags & CAM_CDB_POINTER)
417 command = csio->cdb_io.cdb_ptr[0];
418 else
419 command = csio->cdb_io.cdb_bytes[0];
420 if (command == INQUIRY) {
421 device = csio->data_ptr[0] & 0x1f;
422 if ((!mfi_allow_disks && device == T_DIRECT) ||
423 (device == T_PROCESSOR))
424 csio->data_ptr[0] =
425 (csio->data_ptr[0] & 0xe0) | T_NODEVICE;
426 }
427 break;
428 }
429 case MFI_STAT_SCSI_DONE_WITH_ERROR:
430 {
431 int sense_len;
432
433 ccbh->status = CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID;
434 csio->scsi_status = pt->header.scsi_status;
435 if (pt->header.sense_len < csio->sense_len)
436 csio->sense_resid = csio->sense_len -
437 pt->header.sense_len;
438 else
439 csio->sense_resid = 0;
440 sense_len = min(pt->header.sense_len,
441 sizeof(struct scsi_sense_data));
442 bzero(&csio->sense_data, sizeof(struct scsi_sense_data));
443 bcopy(&cm->cm_sense->data[0], &csio->sense_data, sense_len);
444 break;
445 }
446 case MFI_STAT_DEVICE_NOT_FOUND:
447 ccbh->status = CAM_SEL_TIMEOUT;
448 break;
449 case MFI_STAT_SCSI_IO_FAILED:
450 ccbh->status = CAM_REQ_CMP_ERR;
451 csio->scsi_status = pt->header.scsi_status;
452 break;
453 default:
454 ccbh->status = CAM_REQ_CMP_ERR;
455 csio->scsi_status = pt->header.scsi_status;
456 break;
457 }
458
459 mfi_release_command(cm);
460 xpt_done(ccb);
461 }
462
463 static void
464 mfip_cam_poll(struct cam_sim *sim)
465 {
466 struct mfip_softc *sc = cam_sim_softc(sim);
467 struct mfi_softc *mfisc = sc->mfi_sc;
468
469 mfisc->mfi_intr_ptr(mfisc);
470 }
471
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