xref: /freebsd/sys/dev/ahci/ahciem.c (revision af6a5351a1fdb1130f18be6c782c4d48916eb971)
1 /*-
2  * Copyright (c) 2012 Alexander Motin <mav@FreeBSD.org>
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  *    without modification, immediately at the beginning of the file.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25  */
26 
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29 
30 #include <sys/param.h>
31 #include <sys/module.h>
32 #include <sys/systm.h>
33 #include <sys/kernel.h>
34 #include <sys/bus.h>
35 #include <sys/conf.h>
36 #include <sys/endian.h>
37 #include <sys/malloc.h>
38 #include <sys/lock.h>
39 #include <sys/mutex.h>
40 #include <machine/stdarg.h>
41 #include <machine/resource.h>
42 #include <machine/bus.h>
43 #include <sys/rman.h>
44 #include <dev/led/led.h>
45 #include <dev/pci/pcivar.h>
46 #include <dev/pci/pcireg.h>
47 #include "ahci.h"
48 
49 #include <cam/cam.h>
50 #include <cam/cam_ccb.h>
51 #include <cam/cam_sim.h>
52 #include <cam/cam_xpt_sim.h>
53 #include <cam/cam_debug.h>
54 #include <cam/scsi/scsi_ses.h>
55 
56 /* local prototypes */
57 static void ahciemaction(struct cam_sim *sim, union ccb *ccb);
58 static void ahciempoll(struct cam_sim *sim);
59 static int ahci_em_reset(device_t dev);
60 static void ahci_em_led(void *priv, int onoff);
61 static void ahci_em_setleds(device_t dev, int c);
62 
63 static int
64 ahci_em_probe(device_t dev)
65 {
66 
67 	device_set_desc_copy(dev, "AHCI enclosure management bridge");
68 	return (BUS_PROBE_DEFAULT);
69 }
70 
71 static int
72 ahci_em_attach(device_t dev)
73 {
74 	device_t parent = device_get_parent(dev);
75 	struct ahci_controller *ctlr = device_get_softc(parent);
76 	struct ahci_enclosure *enc = device_get_softc(dev);
77 	struct cam_devq *devq;
78 	int i, c, rid, error;
79 	char buf[32];
80 
81 	enc->dev = dev;
82 	enc->quirks = ctlr->quirks;
83 	enc->channels = ctlr->channels;
84 	enc->ichannels = ctlr->ichannels;
85 	mtx_init(&enc->mtx, "AHCI enclosure lock", NULL, MTX_DEF);
86 	rid = 0;
87 	if (!(enc->r_memc = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
88 	    &rid, RF_ACTIVE))) {
89 		mtx_destroy(&enc->mtx);
90 		return (ENXIO);
91 	}
92 	enc->capsem = ATA_INL(enc->r_memc, 0);
93 	rid = 1;
94 	if (!(enc->r_memt = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
95 	    &rid, RF_ACTIVE))) {
96 		error = ENXIO;
97 		goto err0;
98 	}
99 	if ((enc->capsem & (AHCI_EM_XMT | AHCI_EM_SMB)) == 0) {
100 		rid = 2;
101 		if (!(enc->r_memr = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
102 		    &rid, RF_ACTIVE))) {
103 			error = ENXIO;
104 			goto err0;
105 		}
106 	} else
107 		enc->r_memr = NULL;
108 	mtx_lock(&enc->mtx);
109 	if (ahci_em_reset(dev) != 0) {
110 	    error = ENXIO;
111 	    goto err1;
112 	}
113 	rid = ATA_IRQ_RID;
114 	/* Create the device queue for our SIM. */
115 	devq = cam_simq_alloc(1);
116 	if (devq == NULL) {
117 		device_printf(dev, "Unable to allocate SIM queue\n");
118 		error = ENOMEM;
119 		goto err1;
120 	}
121 	/* Construct SIM entry */
122 	enc->sim = cam_sim_alloc(ahciemaction, ahciempoll, "ahciem", enc,
123 	    device_get_unit(dev), &enc->mtx,
124 	    1, 0, devq);
125 	if (enc->sim == NULL) {
126 		cam_simq_free(devq);
127 		device_printf(dev, "Unable to allocate SIM\n");
128 		error = ENOMEM;
129 		goto err1;
130 	}
131 	if (xpt_bus_register(enc->sim, dev, 0) != CAM_SUCCESS) {
132 		device_printf(dev, "unable to register xpt bus\n");
133 		error = ENXIO;
134 		goto err2;
135 	}
136 	if (xpt_create_path(&enc->path, /*periph*/NULL, cam_sim_path(enc->sim),
137 	    CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
138 		device_printf(dev, "Unable to create path\n");
139 		error = ENXIO;
140 		goto err3;
141 	}
142 	mtx_unlock(&enc->mtx);
143 	if (bootverbose) {
144 		device_printf(dev, "Caps:%s%s%s%s%s%s%s%s\n",
145 		    (enc->capsem & AHCI_EM_PM) ? " PM":"",
146 		    (enc->capsem & AHCI_EM_ALHD) ? " ALHD":"",
147 		    (enc->capsem & AHCI_EM_XMT) ? " XMT":"",
148 		    (enc->capsem & AHCI_EM_SMB) ? " SMB":"",
149 		    (enc->capsem & AHCI_EM_SGPIO) ? " SGPIO":"",
150 		    (enc->capsem & AHCI_EM_SES2) ? " SES-2":"",
151 		    (enc->capsem & AHCI_EM_SAFTE) ? " SAF-TE":"",
152 		    (enc->capsem & AHCI_EM_LED) ? " LED":"");
153 	}
154 	if ((enc->capsem & AHCI_EM_LED)) {
155 		for (c = 0; c < enc->channels; c++) {
156 			if ((enc->ichannels & (1 << c)) == 0)
157 				continue;
158 			for (i = 0; i < AHCI_NUM_LEDS; i++) {
159 				enc->leds[c * AHCI_NUM_LEDS + i].dev = dev;
160 				enc->leds[c * AHCI_NUM_LEDS + i].num =
161 				    c * AHCI_NUM_LEDS + i;
162 			}
163 			if ((enc->capsem & AHCI_EM_ALHD) == 0) {
164 				snprintf(buf, sizeof(buf), "%s.%d.act",
165 				    device_get_nameunit(parent), c);
166 				enc->leds[c * AHCI_NUM_LEDS + 0].led =
167 				    led_create(ahci_em_led,
168 				    &enc->leds[c * AHCI_NUM_LEDS + 0], buf);
169 			}
170 			snprintf(buf, sizeof(buf), "%s.%d.locate",
171 			    device_get_nameunit(parent), c);
172 			enc->leds[c * AHCI_NUM_LEDS + 1].led =
173 			    led_create(ahci_em_led,
174 			    &enc->leds[c * AHCI_NUM_LEDS + 1], buf);
175 			snprintf(buf, sizeof(buf), "%s.%d.fault",
176 			    device_get_nameunit(parent), c);
177 			enc->leds[c * AHCI_NUM_LEDS + 2].led =
178 			    led_create(ahci_em_led,
179 			    &enc->leds[c * AHCI_NUM_LEDS + 2], buf);
180 		}
181 	}
182 	return (0);
183 
184 err3:
185 	xpt_bus_deregister(cam_sim_path(enc->sim));
186 err2:
187 	cam_sim_free(enc->sim, /*free_devq*/TRUE);
188 err1:
189 	mtx_unlock(&enc->mtx);
190 	if (enc->r_memr)
191 		bus_release_resource(dev, SYS_RES_MEMORY, 2, enc->r_memr);
192 err0:
193 	if (enc->r_memt)
194 		bus_release_resource(dev, SYS_RES_MEMORY, 1, enc->r_memt);
195 	bus_release_resource(dev, SYS_RES_MEMORY, 0, enc->r_memc);
196 	mtx_destroy(&enc->mtx);
197 	return (error);
198 }
199 
200 static int
201 ahci_em_detach(device_t dev)
202 {
203 	struct ahci_enclosure *enc = device_get_softc(dev);
204 	int i;
205 
206 	for (i = 0; i < enc->channels * AHCI_NUM_LEDS; i++) {
207 		if (enc->leds[i].led)
208 			led_destroy(enc->leds[i].led);
209 	}
210 	mtx_lock(&enc->mtx);
211 	xpt_async(AC_LOST_DEVICE, enc->path, NULL);
212 	xpt_free_path(enc->path);
213 	xpt_bus_deregister(cam_sim_path(enc->sim));
214 	cam_sim_free(enc->sim, /*free_devq*/TRUE);
215 	mtx_unlock(&enc->mtx);
216 
217 	bus_release_resource(dev, SYS_RES_MEMORY, 0, enc->r_memc);
218 	bus_release_resource(dev, SYS_RES_MEMORY, 1, enc->r_memt);
219 	if (enc->r_memr)
220 		bus_release_resource(dev, SYS_RES_MEMORY, 2, enc->r_memr);
221 	mtx_destroy(&enc->mtx);
222 	return (0);
223 }
224 
225 static int
226 ahci_em_reset(device_t dev)
227 {
228 	struct ahci_enclosure *enc;
229 	int i, timeout;
230 
231 	enc = device_get_softc(dev);
232 	ATA_OUTL(enc->r_memc, 0, AHCI_EM_RST);
233 	timeout = 1000;
234 	while ((ATA_INL(enc->r_memc, 0) & AHCI_EM_RST) &&
235 	    --timeout > 0)
236 		DELAY(1000);
237 	if (timeout == 0) {
238 		device_printf(dev, "EM timeout\n");
239 		return (1);
240 	}
241 	for (i = 0; i < enc->channels; i++)
242 		ahci_em_setleds(dev, i);
243 	return (0);
244 }
245 
246 static int
247 ahci_em_suspend(device_t dev)
248 {
249 	struct ahci_enclosure *enc = device_get_softc(dev);
250 
251 	mtx_lock(&enc->mtx);
252 	xpt_freeze_simq(enc->sim, 1);
253 	mtx_unlock(&enc->mtx);
254 	return (0);
255 }
256 
257 static int
258 ahci_em_resume(device_t dev)
259 {
260 	struct ahci_enclosure *enc = device_get_softc(dev);
261 
262 	mtx_lock(&enc->mtx);
263 	ahci_em_reset(dev);
264 	xpt_release_simq(enc->sim, TRUE);
265 	mtx_unlock(&enc->mtx);
266 	return (0);
267 }
268 
269 devclass_t ahciem_devclass;
270 static device_method_t ahciem_methods[] = {
271 	DEVMETHOD(device_probe,     ahci_em_probe),
272 	DEVMETHOD(device_attach,    ahci_em_attach),
273 	DEVMETHOD(device_detach,    ahci_em_detach),
274 	DEVMETHOD(device_suspend,   ahci_em_suspend),
275 	DEVMETHOD(device_resume,    ahci_em_resume),
276 	DEVMETHOD_END
277 };
278 static driver_t ahciem_driver = {
279         "ahciem",
280         ahciem_methods,
281         sizeof(struct ahci_enclosure)
282 };
283 DRIVER_MODULE(ahciem, ahci, ahciem_driver, ahciem_devclass, NULL, NULL);
284 
285 static void
286 ahci_em_setleds(device_t dev, int c)
287 {
288 	struct ahci_enclosure *enc;
289 	int timeout;
290 	int16_t val;
291 
292 	enc = device_get_softc(dev);
293 
294 	val = 0;
295 	if (enc->status[c][2] & 0x80)		/* Activity */
296 		val |= (1 << 0);
297 	if (enc->status[c][2] & SESCTL_RQSID)	/* Identification */
298 		val |= (1 << 3);
299 	else if (enc->status[c][3] & SESCTL_RQSFLT)	/* Fault */
300 		val |= (1 << 6);
301 	else if (enc->status[c][1] & 0x02)		/* Rebuild */
302 		val |= (1 << 6) | (1 << 3);
303 
304 	timeout = 10000;
305 	while (ATA_INL(enc->r_memc, 0) & (AHCI_EM_TM | AHCI_EM_RST) &&
306 	    --timeout > 0)
307 		DELAY(100);
308 	if (timeout == 0)
309 		device_printf(dev, "Transmit timeout\n");
310 	ATA_OUTL(enc->r_memt, 0, (1 << 8) | (0 << 16) | (0 << 24));
311 	ATA_OUTL(enc->r_memt, 4, c | (0 << 8) | (val << 16));
312 	ATA_OUTL(enc->r_memc, 0, AHCI_EM_TM);
313 }
314 
315 static void
316 ahci_em_led(void *priv, int onoff)
317 {
318 	struct ahci_led *led;
319 	struct ahci_enclosure *enc;
320 	int c, l;
321 
322 	led = (struct ahci_led *)priv;
323 	enc = device_get_softc(led->dev);
324 	c = led->num / AHCI_NUM_LEDS;
325 	l = led->num % AHCI_NUM_LEDS;
326 
327 	if (l == 0) {
328 		if (onoff)
329 			enc->status[c][2] |= 0x80;
330 		else
331 			enc->status[c][2] &= ~0x80;
332 	} else if (l == 1) {
333 		if (onoff)
334 			enc->status[c][2] |= SESCTL_RQSID;
335 		else
336 			enc->status[c][2] &= ~SESCTL_RQSID;
337 	} else if (l == 2) {
338 		if (onoff)
339 			enc->status[c][3] |= SESCTL_RQSFLT;
340 		else
341 			enc->status[c][3] &= SESCTL_RQSFLT;
342 	}
343 	ahci_em_setleds(led->dev, c);
344 }
345 
346 static int
347 ahci_check_ids(union ccb *ccb)
348 {
349 
350 	if (ccb->ccb_h.target_id != 0) {
351 		ccb->ccb_h.status = CAM_TID_INVALID;
352 		xpt_done(ccb);
353 		return (-1);
354 	}
355 	if (ccb->ccb_h.target_lun != 0) {
356 		ccb->ccb_h.status = CAM_LUN_INVALID;
357 		xpt_done(ccb);
358 		return (-1);
359 	}
360 	return (0);
361 }
362 
363 static void
364 ahci_em_emulate_ses_on_led(device_t dev, union ccb *ccb)
365 {
366 	struct ahci_enclosure *enc;
367 	struct ses_status_page *page;
368 	struct ses_status_array_dev_slot *ads, *ads0;
369 	struct ses_elm_desc_hdr *elmd;
370 	uint8_t *buf;
371 	int i;
372 
373 	enc = device_get_softc(dev);
374 	buf = ccb->ataio.data_ptr;
375 
376 	/* General request validation. */
377 	if (ccb->ataio.cmd.command != ATA_SEP_ATTN ||
378 	    ccb->ataio.dxfer_len < ccb->ataio.cmd.sector_count * 4) {
379 		ccb->ccb_h.status = CAM_REQ_INVALID;
380 		goto out;
381 	}
382 
383 	/* SEMB IDENTIFY */
384 	if (ccb->ataio.cmd.features == 0xEC &&
385 	    ccb->ataio.cmd.sector_count >= 16) {
386 		bzero(buf, ccb->ataio.dxfer_len);
387 		buf[0] = 64;		/* Valid bytes. */
388 		buf[2] = 0x30;		/* NAA Locally Assigned. */
389 		strncpy(&buf[3], device_get_nameunit(dev), 7);
390 		strncpy(&buf[10], "AHCI    ", SID_VENDOR_SIZE);
391 		strncpy(&buf[18], "SGPIO Enclosure ", SID_PRODUCT_SIZE);
392 		strncpy(&buf[34], "1.00", SID_REVISION_SIZE);
393 		strncpy(&buf[39], "0001", 4);
394 		strncpy(&buf[43], "S-E-S ", 6);
395 		strncpy(&buf[49], "2.00", 4);
396 		ccb->ccb_h.status = CAM_REQ_CMP;
397 		goto out;
398 	}
399 
400 	/* SEMB RECEIVE DIAGNOSTIC RESULT (0) */
401 	page = (struct ses_status_page *)buf;
402 	if (ccb->ataio.cmd.lba_low == 0x02 &&
403 	    ccb->ataio.cmd.features == 0x00 &&
404 	    ccb->ataio.cmd.sector_count >= 2) {
405 		bzero(buf, ccb->ataio.dxfer_len);
406 		page->hdr.page_code = 0;
407 		scsi_ulto2b(4, page->hdr.length);
408 		buf[4] = 0;
409 		buf[5] = 1;
410 		buf[6] = 2;
411 		buf[7] = 7;
412 		ccb->ccb_h.status = CAM_REQ_CMP;
413 		goto out;
414 	}
415 
416 	/* SEMB RECEIVE DIAGNOSTIC RESULT (1) */
417 	if (ccb->ataio.cmd.lba_low == 0x02 &&
418 	    ccb->ataio.cmd.features == 0x01 &&
419 	    ccb->ataio.cmd.sector_count >= 13) {
420 		struct ses_enc_desc *ed;
421 		struct ses_elm_type_desc *td;
422 
423 		bzero(buf, ccb->ataio.dxfer_len);
424 		page->hdr.page_code = 0x01;
425 		scsi_ulto2b(4 + 4 + 36 + 4, page->hdr.length);
426 		ed = (struct ses_enc_desc *)&buf[8];
427 		ed->byte0 = 0x11;
428 		ed->subenc_id = 0;
429 		ed->num_types = 1;
430 		ed->length = 36;
431 		strncpy(ed->vendor_id, "AHCI    ", SID_VENDOR_SIZE);
432 		strncpy(ed->product_id, "SGPIO Enclosure ", SID_PRODUCT_SIZE);
433 		strncpy(ed->product_rev, "    ", SID_REVISION_SIZE);
434 		td = (struct ses_elm_type_desc *)ses_enc_desc_next(ed);
435 		td->etype_elm_type = 0x17;
436 		td->etype_maxelt = enc->channels;
437 		td->etype_subenc = 0;
438 		td->etype_txt_len = 0;
439 		ccb->ccb_h.status = CAM_REQ_CMP;
440 		goto out;
441 	}
442 
443 	/* SEMB RECEIVE DIAGNOSTIC RESULT (2) */
444 	if (ccb->ataio.cmd.lba_low == 0x02 &&
445 	    ccb->ataio.cmd.features == 0x02 &&
446 	    ccb->ataio.cmd.sector_count >= (3 + enc->channels)) {
447 		bzero(buf, ccb->ataio.dxfer_len);
448 		page->hdr.page_code = 0x02;
449 		scsi_ulto2b(4 + 4 * (1 + enc->channels),
450 		    page->hdr.length);
451 		for (i = 0; i < enc->channels; i++) {
452 			ads = &page->elements[i + 1].array_dev_slot;
453 			memcpy(ads, enc->status[i], 4);
454 			ads->common.bytes[0] |=
455 			    (enc->ichannels & (1 << i)) ?
456 			     SES_OBJSTAT_UNKNOWN :
457 			     SES_OBJSTAT_NOTINSTALLED;
458 		}
459 		ccb->ccb_h.status = CAM_REQ_CMP;
460 		goto out;
461 	}
462 
463 	/* SEMB SEND DIAGNOSTIC (2) */
464 	if (ccb->ataio.cmd.lba_low == 0x82 &&
465 	    ccb->ataio.cmd.features == 0x02 &&
466 	    ccb->ataio.cmd.sector_count >= (3 + enc->channels)) {
467 		ads0 = &page->elements[0].array_dev_slot;
468 		for (i = 0; i < enc->channels; i++) {
469 			ads = &page->elements[i + 1].array_dev_slot;
470 			if (ads->common.bytes[0] & SESCTL_CSEL) {
471 				enc->status[i][0] = 0;
472 				enc->status[i][1] =
473 				    ads->bytes[0] & 0x02;
474 				enc->status[i][2] =
475 				    ads->bytes[1] & (0x80 | SESCTL_RQSID);
476 				enc->status[i][3] =
477 				    ads->bytes[2] & SESCTL_RQSFLT;
478 				ahci_em_setleds(dev, i);
479 			} else if (ads0->common.bytes[0] & SESCTL_CSEL) {
480 				enc->status[i][0] = 0;
481 				enc->status[i][1] =
482 				    ads0->bytes[0] & 0x02;
483 				enc->status[i][2] =
484 				    ads0->bytes[1] & (0x80 | SESCTL_RQSID);
485 				enc->status[i][3] =
486 				    ads0->bytes[2] & SESCTL_RQSFLT;
487 				ahci_em_setleds(dev, i);
488 			}
489 		}
490 		ccb->ccb_h.status = CAM_REQ_CMP;
491 		goto out;
492 	}
493 
494 	/* SEMB RECEIVE DIAGNOSTIC RESULT (7) */
495 	if (ccb->ataio.cmd.lba_low == 0x02 &&
496 	    ccb->ataio.cmd.features == 0x07 &&
497 	    ccb->ataio.cmd.sector_count >= (3 + 3 * enc->channels)) {
498 		bzero(buf, ccb->ataio.dxfer_len);
499 		page->hdr.page_code = 0x07;
500 		scsi_ulto2b(4 + 4 + 12 * enc->channels,
501 		    page->hdr.length);
502 		for (i = 0; i < enc->channels; i++) {
503 			elmd = (struct ses_elm_desc_hdr *)&buf[8 + 4 + 12 * i];
504 			scsi_ulto2b(8, elmd->length);
505 			snprintf((char *)(elmd + 1), 9, "SLOT %03d", i);
506 		}
507 		ccb->ccb_h.status = CAM_REQ_CMP;
508 		goto out;
509 	}
510 
511 	ccb->ccb_h.status = CAM_REQ_INVALID;
512 out:
513 	xpt_done(ccb);
514 }
515 
516 static void
517 ahci_em_begin_transaction(device_t dev, union ccb *ccb)
518 {
519 	struct ahci_enclosure *enc;
520 	struct ata_res *res;
521 
522 	enc = device_get_softc(dev);
523 	res = &ccb->ataio.res;
524 	bzero(res, sizeof(*res));
525 	if ((ccb->ataio.cmd.flags & CAM_ATAIO_CONTROL) &&
526 	    (ccb->ataio.cmd.control & ATA_A_RESET)) {
527 		res->lba_high = 0xc3;
528 		res->lba_mid = 0x3c;
529 		ccb->ccb_h.status = CAM_REQ_CMP;
530 		xpt_done(ccb);
531 		return;
532 	}
533 
534 	if (enc->capsem & AHCI_EM_LED) {
535 		ahci_em_emulate_ses_on_led(dev, ccb);
536 		return;
537 	} else
538 		device_printf(dev, "Unsupported enclosure interface\n");
539 
540 	ccb->ccb_h.status = CAM_REQ_INVALID;
541 	xpt_done(ccb);
542 }
543 
544 static void
545 ahciemaction(struct cam_sim *sim, union ccb *ccb)
546 {
547 	device_t dev, parent;
548 	struct ahci_enclosure *enc;
549 
550 	CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
551 	    ("ahciemaction func_code=%x\n", ccb->ccb_h.func_code));
552 
553 	enc = cam_sim_softc(sim);
554 	dev = enc->dev;
555 	switch (ccb->ccb_h.func_code) {
556 	case XPT_ATA_IO:	/* Execute the requested I/O operation */
557 		if (ahci_check_ids(ccb))
558 			return;
559 		ahci_em_begin_transaction(dev, ccb);
560 		return;
561 	case XPT_RESET_BUS:		/* Reset the specified bus */
562 	case XPT_RESET_DEV:	/* Bus Device Reset the specified device */
563 		ahci_em_reset(dev);
564 		ccb->ccb_h.status = CAM_REQ_CMP;
565 		break;
566 	case XPT_PATH_INQ:		/* Path routing inquiry */
567 	{
568 		struct ccb_pathinq *cpi = &ccb->cpi;
569 
570 		parent = device_get_parent(dev);
571 		cpi->version_num = 1; /* XXX??? */
572 		cpi->hba_inquiry = PI_SDTR_ABLE;
573 		cpi->target_sprt = 0;
574 		cpi->hba_misc = PIM_SEQSCAN;
575 		cpi->hba_eng_cnt = 0;
576 		cpi->max_target = 0;
577 		cpi->max_lun = 0;
578 		cpi->initiator_id = 0;
579 		cpi->bus_id = cam_sim_bus(sim);
580 		cpi->base_transfer_speed = 150000;
581 		strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
582 		strlcpy(cpi->hba_vid, "AHCI", HBA_IDLEN);
583 		strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
584 		cpi->unit_number = cam_sim_unit(sim);
585 		cpi->transport = XPORT_SATA;
586 		cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
587 		cpi->protocol = PROTO_ATA;
588 		cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
589 		cpi->maxio = MAXPHYS;
590 		cpi->hba_vendor = pci_get_vendor(parent);
591 		cpi->hba_device = pci_get_device(parent);
592 		cpi->hba_subvendor = pci_get_subvendor(parent);
593 		cpi->hba_subdevice = pci_get_subdevice(parent);
594 		cpi->ccb_h.status = CAM_REQ_CMP;
595 		break;
596 	}
597 	default:
598 		ccb->ccb_h.status = CAM_REQ_INVALID;
599 		break;
600 	}
601 	xpt_done(ccb);
602 }
603 
604 static void
605 ahciempoll(struct cam_sim *sim)
606 {
607 
608 }
609