Annotation of sys/dev/sbus/isp_sbus.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: isp_sbus.c,v 1.8 2006/06/02 20:00:56 miod Exp $ */
2: /* $NetBSD: isp_sbus.c,v 1.46 2001/09/26 20:53:14 eeh Exp $ */
3:
4: /*
5: * This driver, which is contained in NetBSD in the files:
6: *
7: * sys/dev/ic/isp.c
8: * sys/dev/ic/isp_inline.h
9: * sys/dev/ic/isp_netbsd.c
10: * sys/dev/ic/isp_netbsd.h
11: * sys/dev/ic/isp_target.c
12: * sys/dev/ic/isp_target.h
13: * sys/dev/ic/isp_tpublic.h
14: * sys/dev/ic/ispmbox.h
15: * sys/dev/ic/ispreg.h
16: * sys/dev/ic/ispvar.h
17: * sys/microcode/isp/asm_sbus.h
18: * sys/microcode/isp/asm_1040.h
19: * sys/microcode/isp/asm_1080.h
20: * sys/microcode/isp/asm_12160.h
21: * sys/microcode/isp/asm_2100.h
22: * sys/microcode/isp/asm_2200.h
23: * sys/pci/isp_pci.c
24: * sys/sbus/isp_sbus.c
25: *
26: * Is being actively maintained by Matthew Jacob (mjacob@netbsd.org).
27: * This driver also is shared source with FreeBSD, OpenBSD, Linux, Solaris,
28: * Linux versions. This tends to be an interesting maintenance problem.
29: *
30: * Please coordinate with Matthew Jacob on changes you wish to make here.
31: */
32: /*
33: * SBus specific probe and attach routines for Qlogic ISP SCSI adapters.
34: *
35: * Copyright (c) 1997, 2001 by Matthew Jacob
36: * NASA AMES Research Center
37: * All rights reserved.
38: *
39: * Redistribution and use in source and binary forms, with or without
40: * modification, are permitted provided that the following conditions
41: * are met:
42: * 1. Redistributions of source code must retain the above copyright
43: * notice immediately at the beginning of the file, without modification,
44: * this list of conditions, and the following disclaimer.
45: * 2. Redistributions in binary form must reproduce the above copyright
46: * notice, this list of conditions and the following disclaimer in the
47: * documentation and/or other materials provided with the distribution.
48: *
49: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
50: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
53: * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59: * SUCH DAMAGE.
60: *
61: */
62:
63: #include <sys/param.h>
64: #include <sys/systm.h>
65: #include <sys/device.h>
66: #include <sys/kernel.h>
67: #include <sys/malloc.h>
68: #include <sys/queue.h>
69:
70: #include <machine/bus.h>
71: #include <machine/intr.h>
72: #include <machine/autoconf.h>
73:
74: #include <dev/ic/isp_openbsd.h>
75: #if defined(ISP_COMPILE_FW) || defined(ISP_COMPILE_1000_FW)
76: #include <dev/microcode/isp/asm_sbus.h>
77: #endif
78: #include <dev/sbus/sbusvar.h>
79: #include <sys/reboot.h>
80:
81: static int isp_sbus_intr(void *);
82: static int
83: isp_sbus_rd_isr(struct ispsoftc *, u_int16_t *, u_int16_t *, u_int16_t *);
84: static u_int16_t isp_sbus_rd_reg(struct ispsoftc *, int);
85: static void isp_sbus_wr_reg (struct ispsoftc *, int, u_int16_t);
86: static int isp_sbus_mbxdma(struct ispsoftc *);
87: static int isp_sbus_dmasetup(struct ispsoftc *, XS_T *, ispreq_t *, u_int16_t *,
88: u_int16_t);
89: static void isp_sbus_dmateardown(struct ispsoftc *, XS_T *, u_int16_t);
90:
91: #ifndef ISP_1000_RISC_CODE
92: #define ISP_1000_RISC_CODE NULL
93: #endif
94:
95: static struct ispmdvec mdvec = {
96: isp_sbus_rd_isr,
97: isp_sbus_rd_reg,
98: isp_sbus_wr_reg,
99: isp_sbus_mbxdma,
100: isp_sbus_dmasetup,
101: isp_sbus_dmateardown,
102: NULL,
103: NULL,
104: NULL,
105: (u_int16_t *) ISP_1000_RISC_CODE
106: };
107:
108: struct isp_sbussoftc {
109: struct ispsoftc sbus_isp;
110: sdparam sbus_dev;
111: bus_space_tag_t sbus_bustag;
112: bus_space_handle_t sbus_reg;
113: int sbus_node;
114: int sbus_pri;
115: struct ispmdvec sbus_mdvec;
116: bus_dmamap_t *sbus_dmamap;
117: int16_t sbus_poff[_NREG_BLKS];
118: };
119:
120:
121: static int isp_match(struct device *, void *, void *);
122: static void isp_sbus_attach(struct device *, struct device *, void *);
123: struct cfattach isp_sbus_ca = {
124: sizeof (struct isp_sbussoftc), isp_match, isp_sbus_attach
125: };
126:
127: static int
128: isp_match(struct device *parent, void *vcf, void *aux)
129: {
130: struct cfdata *cf = vcf;
131: int rv;
132: #ifdef DEBUG
133: static int oneshot = 1;
134: #endif
135: struct sbus_attach_args *sa = aux;
136:
137: rv = (strcmp(cf->cf_driver->cd_name, sa->sa_name) == 0 ||
138: strcmp("PTI,ptisp", sa->sa_name) == 0 ||
139: strcmp("ptisp", sa->sa_name) == 0 ||
140: strcmp("SUNW,isp", sa->sa_name) == 0 ||
141: strcmp("QLGC,isp", sa->sa_name) == 0);
142: #ifdef DEBUG
143: if (rv && oneshot) {
144: oneshot = 0;
145: printf("Qlogic ISP Driver, NetBSD (sbus) Platform Version "
146: "%d.%d Core Version %d.%d\n",
147: ISP_PLATFORM_VERSION_MAJOR, ISP_PLATFORM_VERSION_MINOR,
148: ISP_CORE_VERSION_MAJOR, ISP_CORE_VERSION_MINOR);
149: }
150: #endif
151: return (rv);
152: }
153:
154:
155: static void
156: isp_sbus_attach(struct device *parent, struct device *self, void *aux)
157: {
158: int freq, ispburst, sbusburst;
159: struct sbus_attach_args *sa = aux;
160: struct isp_sbussoftc *sbc = (struct isp_sbussoftc *) self;
161: struct ispsoftc *isp = &sbc->sbus_isp;
162:
163: printf(": %s\n", sa->sa_name);
164:
165: sbc->sbus_bustag = sa->sa_bustag;
166: if (sa->sa_nintr != 0)
167: sbc->sbus_pri = sa->sa_pri;
168: sbc->sbus_mdvec = mdvec;
169:
170: if (sa->sa_npromvaddrs != 0) {
171: if (bus_space_map(sa->sa_bustag, sa->sa_promvaddrs[0],
172: sa->sa_size,
173: BUS_SPACE_MAP_PROMADDRESS | BUS_SPACE_MAP_LINEAR,
174: &sbc->sbus_reg) == 0) {
175: printf("%s: cannot map registers\n", self->dv_xname);
176: return;
177: }
178: } else {
179: if (sbus_bus_map(sa->sa_bustag, sa->sa_slot, sa->sa_offset,
180: sa->sa_size, BUS_SPACE_MAP_LINEAR, 0,
181: &sbc->sbus_reg) != 0) {
182: printf("%s: cannot map registers\n", self->dv_xname);
183: return;
184: }
185: }
186: sbc->sbus_node = sa->sa_node;
187:
188: freq = getpropint(sa->sa_node, "clock-frequency", 0);
189: if (freq) {
190: /*
191: * Convert from HZ to MHz, rounding up.
192: */
193: freq = (freq + 500000)/1000000;
194: #if 0
195: printf("%s: %d MHz\n", self->dv_xname, freq);
196: #endif
197: }
198: sbc->sbus_mdvec.dv_clock = freq;
199:
200: /*
201: * Now figure out what the proper burst sizes, etc., to use.
202: * Unfortunately, there is no ddi_dma_burstsizes here which
203: * walks up the tree finding the limiting burst size node (if
204: * any).
205: */
206: sbusburst = ((struct sbus_softc *)parent)->sc_burst;
207: if (sbusburst == 0)
208: sbusburst = SBUS_BURST_32 - 1;
209: ispburst = getpropint(sa->sa_node, "burst-sizes", -1);
210: if (ispburst == -1) {
211: ispburst = sbusburst;
212: }
213: ispburst &= sbusburst;
214: ispburst &= ~(1 << 7);
215: ispburst &= ~(1 << 6);
216: sbc->sbus_mdvec.dv_conf1 = 0;
217: if (ispburst & (1 << 5)) {
218: sbc->sbus_mdvec.dv_conf1 = BIU_SBUS_CONF1_FIFO_32;
219: } else if (ispburst & (1 << 4)) {
220: sbc->sbus_mdvec.dv_conf1 = BIU_SBUS_CONF1_FIFO_16;
221: } else if (ispburst & (1 << 3)) {
222: sbc->sbus_mdvec.dv_conf1 =
223: BIU_SBUS_CONF1_BURST8 | BIU_SBUS_CONF1_FIFO_8;
224: }
225: if (sbc->sbus_mdvec.dv_conf1) {
226: sbc->sbus_mdvec.dv_conf1 |= BIU_BURST_ENABLE;
227: }
228:
229: /*
230: * Some early versions of the PTI SBus adapter
231: * would fail in trying to download (via poking)
232: * FW. We give up on them.
233: */
234: if (strcmp("PTI,ptisp", sa->sa_name) == 0 ||
235: strcmp("ptisp", sa->sa_name) == 0) {
236: sbc->sbus_mdvec.dv_ispfw = NULL;
237: }
238:
239: isp->isp_mdvec = &sbc->sbus_mdvec;
240: isp->isp_bustype = ISP_BT_SBUS;
241: isp->isp_type = ISP_HA_SCSI_UNKNOWN;
242: isp->isp_param = &sbc->sbus_dev;
243: isp->isp_dmatag = sa->sa_dmatag;
244: MEMZERO(isp->isp_param, sizeof (sdparam));
245:
246: sbc->sbus_poff[BIU_BLOCK >> _BLK_REG_SHFT] = BIU_REGS_OFF;
247: sbc->sbus_poff[MBOX_BLOCK >> _BLK_REG_SHFT] = SBUS_MBOX_REGS_OFF;
248: sbc->sbus_poff[SXP_BLOCK >> _BLK_REG_SHFT] = SBUS_SXP_REGS_OFF;
249: sbc->sbus_poff[RISC_BLOCK >> _BLK_REG_SHFT] = SBUS_RISC_REGS_OFF;
250: sbc->sbus_poff[DMA_BLOCK >> _BLK_REG_SHFT] = DMA_REGS_OFF;
251:
252: /* Establish interrupt channel */
253: bus_intr_establish(sbc->sbus_bustag, sbc->sbus_pri, IPL_BIO, 0,
254: isp_sbus_intr, sbc, self->dv_xname);
255:
256: /*
257: * Set up logging levels.
258: */
259: #ifdef ISP_LOGDEFAULT
260: isp->isp_dblev = ISP_LOGDEFAULT;
261: #else
262: isp->isp_dblev = ISP_LOGWARN|ISP_LOGERR;
263: #ifdef SCSIDEBUG
264: isp->isp_dblev |= ISP_LOGDEBUG1|ISP_LOGDEBUG2;
265: #endif
266: #ifdef DEBUG
267: isp->isp_dblev |= ISP_LOGDEBUG0|ISP_LOGCONFIG|ISP_LOGINFO;
268: #endif
269: #endif
270:
271: isp->isp_confopts = self->dv_cfdata->cf_flags;
272: isp->isp_role = ISP_DEFAULT_ROLES;
273:
274: /*
275: * There's no tool on sparc to set NVRAM for ISPs, so ignore it.
276: */
277: isp->isp_confopts |= ISP_CFG_NONVRAM;
278: ISP_LOCK(isp);
279: isp->isp_osinfo.no_mbox_ints = 1;
280: isp_reset(isp);
281: if (isp->isp_state != ISP_RESETSTATE) {
282: ISP_UNLOCK(isp);
283: return;
284: }
285: ENABLE_INTS(isp);
286: isp_init(isp);
287: if (isp->isp_state != ISP_INITSTATE) {
288: isp_uninit(isp);
289: ISP_UNLOCK(isp);
290: return;
291: }
292:
293: /*
294: * do generic attach.
295: */
296: ISP_UNLOCK(isp);
297: isp_attach(isp);
298: if (isp->isp_state != ISP_RUNSTATE) {
299: ISP_LOCK(isp);
300: isp_uninit(isp);
301: ISP_UNLOCK(isp);
302: }
303: }
304:
305: static int
306: isp_sbus_intr(void *arg)
307: {
308: u_int16_t isr, sema, mbox;
309: struct ispsoftc *isp = arg;
310:
311: isp->isp_intcnt++;
312: if (ISP_READ_ISR(isp, &isr, &sema, &mbox) == 0) {
313: isp->isp_intbogus++;
314: return (0);
315: } else {
316: isp->isp_osinfo.onintstack = 1;
317: isp_intr(isp, isr, sema, mbox);
318: isp->isp_osinfo.onintstack = 0;
319: return (1);
320: }
321: }
322:
323: #define IspVirt2Off(a, x) \
324: (((struct isp_sbussoftc *)a)->sbus_poff[((x) & _BLK_REG_MASK) >> \
325: _BLK_REG_SHFT] + ((x) & 0xff))
326:
327: #define BXR2(sbc, off) \
328: bus_space_read_2(sbc->sbus_bustag, sbc->sbus_reg, off)
329:
330: static int
331: isp_sbus_rd_isr(struct ispsoftc *isp, u_int16_t *isrp,
332: u_int16_t *semap, u_int16_t *mbp)
333: {
334: struct isp_sbussoftc *sbc = (struct isp_sbussoftc *) isp;
335: u_int16_t isr, sema;
336:
337: isr = BXR2(sbc, IspVirt2Off(isp, BIU_ISR));
338: sema = BXR2(sbc, IspVirt2Off(isp, BIU_SEMA));
339: isp_prt(isp, ISP_LOGDEBUG3, "ISR 0x%x SEMA 0x%x", isr, sema);
340: isr &= INT_PENDING_MASK(isp);
341: sema &= BIU_SEMA_LOCK;
342: if (isr == 0 && sema == 0) {
343: return (0);
344: }
345: *isrp = isr;
346: if ((*semap = sema) != 0) {
347: *mbp = BXR2(sbc, IspVirt2Off(isp, OUTMAILBOX0));
348: }
349: return (1);
350: }
351:
352: static u_int16_t
353: isp_sbus_rd_reg(struct ispsoftc *isp, int regoff)
354: {
355: struct isp_sbussoftc *sbc = (struct isp_sbussoftc *) isp;
356: int offset = sbc->sbus_poff[(regoff & _BLK_REG_MASK) >> _BLK_REG_SHFT];
357: offset += (regoff & 0xff);
358: return (bus_space_read_2(sbc->sbus_bustag, sbc->sbus_reg, offset));
359: }
360:
361: static void
362: isp_sbus_wr_reg(struct ispsoftc *isp, int regoff, u_int16_t val)
363: {
364: struct isp_sbussoftc *sbc = (struct isp_sbussoftc *) isp;
365: int offset = sbc->sbus_poff[(regoff & _BLK_REG_MASK) >> _BLK_REG_SHFT];
366: offset += (regoff & 0xff);
367: bus_space_write_2(sbc->sbus_bustag, sbc->sbus_reg, offset, val);
368: }
369:
370: static int
371: isp_sbus_mbxdma(struct ispsoftc *isp)
372: {
373: struct isp_sbussoftc *sbc = (struct isp_sbussoftc *) isp;
374: bus_dma_segment_t reqseg, rspseg;
375: int reqrs, rsprs, i, progress;
376: size_t n;
377: bus_size_t len;
378:
379: if (isp->isp_rquest_dma)
380: return (0);
381:
382: n = isp->isp_maxcmds * sizeof (XS_T *);
383: isp->isp_xflist = (XS_T **) malloc(n, M_DEVBUF, M_WAITOK);
384: if (isp->isp_xflist == NULL) {
385: isp_prt(isp, ISP_LOGERR, "cannot alloc xflist array");
386: return (1);
387: }
388: MEMZERO(isp->isp_xflist, n);
389: n = sizeof (bus_dmamap_t) * isp->isp_maxcmds;
390: sbc->sbus_dmamap = (bus_dmamap_t *) malloc(n, M_DEVBUF, M_WAITOK);
391: if (sbc->sbus_dmamap == NULL) {
392: free(isp->isp_xflist, M_DEVBUF);
393: isp->isp_xflist = NULL;
394: isp_prt(isp, ISP_LOGERR, "cannot alloc dmamap array");
395: return (1);
396: }
397: for (i = 0; i < isp->isp_maxcmds; i++) {
398: /* Allocate a DMA handle */
399: if (bus_dmamap_create(isp->isp_dmatag, MAXPHYS, 1, MAXPHYS, 0,
400: BUS_DMA_NOWAIT, &sbc->sbus_dmamap[i]) != 0) {
401: isp_prt(isp, ISP_LOGERR, "cmd DMA maps create error");
402: break;
403: }
404: }
405: if (i < isp->isp_maxcmds) {
406: while (--i >= 0) {
407: bus_dmamap_destroy(isp->isp_dmatag,
408: sbc->sbus_dmamap[i]);
409: }
410: free(isp->isp_xflist, M_DEVBUF);
411: free(sbc->sbus_dmamap, M_DEVBUF);
412: isp->isp_xflist = NULL;
413: sbc->sbus_dmamap = NULL;
414: return (1);
415: }
416:
417: /*
418: * Allocate and map the request and response queues
419: */
420: progress = 0;
421: len = ISP_QUEUE_SIZE(RQUEST_QUEUE_LEN(isp));
422: if (bus_dmamem_alloc(isp->isp_dmatag, len, 0, 0, &reqseg, 1, &reqrs,
423: BUS_DMA_NOWAIT)) {
424: goto dmafail;
425: }
426: progress++;
427: if (bus_dmamem_map(isp->isp_dmatag, &reqseg, reqrs, len,
428: (caddr_t *)&isp->isp_rquest, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) {
429: goto dmafail;
430: }
431: progress++;
432: if (bus_dmamap_create(isp->isp_dmatag, len, 1, len, 0, BUS_DMA_NOWAIT,
433: &isp->isp_rqdmap) != 0) {
434: goto dmafail;
435: }
436: progress++;
437: if (bus_dmamap_load(isp->isp_dmatag, isp->isp_rqdmap,
438: isp->isp_rquest, len, NULL, BUS_DMA_NOWAIT) != 0) {
439: goto dmafail;
440: }
441: progress++;
442: isp->isp_rquest_dma = isp->isp_rqdmap->dm_segs[0].ds_addr;
443:
444: len = ISP_QUEUE_SIZE(RESULT_QUEUE_LEN(isp));
445: if (bus_dmamem_alloc(isp->isp_dmatag, len, 0, 0, &rspseg, 1, &rsprs,
446: BUS_DMA_NOWAIT)) {
447: goto dmafail;
448: }
449: progress++;
450: if (bus_dmamem_map(isp->isp_dmatag, &rspseg, rsprs, len,
451: (caddr_t *)&isp->isp_result, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) {
452: goto dmafail;
453: }
454: progress++;
455: if (bus_dmamap_create(isp->isp_dmatag, len, 1, len, 0, BUS_DMA_NOWAIT,
456: &isp->isp_rsdmap) != 0) {
457: goto dmafail;
458: }
459: progress++;
460: if (bus_dmamap_load(isp->isp_dmatag, isp->isp_rsdmap,
461: isp->isp_result, len, NULL, BUS_DMA_NOWAIT) != 0) {
462: goto dmafail;
463: }
464: isp->isp_result_dma = isp->isp_rsdmap->dm_segs[0].ds_addr;
465:
466: return (0);
467:
468: dmafail:
469: isp_prt(isp, ISP_LOGERR, "Mailbox DMA Setup Failure");
470:
471: if (progress >= 8) {
472: bus_dmamap_unload(isp->isp_dmatag, isp->isp_rsdmap);
473: }
474: if (progress >= 7) {
475: bus_dmamap_destroy(isp->isp_dmatag, isp->isp_rsdmap);
476: }
477: if (progress >= 6) {
478: bus_dmamem_unmap(isp->isp_dmatag,
479: isp->isp_result, ISP_QUEUE_SIZE(RESULT_QUEUE_LEN(isp)));
480: }
481: if (progress >= 5) {
482: bus_dmamem_free(isp->isp_dmatag, &rspseg, rsprs);
483: }
484:
485: if (progress >= 4) {
486: bus_dmamap_unload(isp->isp_dmatag, isp->isp_rqdmap);
487: }
488: if (progress >= 3) {
489: bus_dmamap_destroy(isp->isp_dmatag, isp->isp_rqdmap);
490: }
491: if (progress >= 2) {
492: bus_dmamem_unmap(isp->isp_dmatag,
493: isp->isp_rquest, ISP_QUEUE_SIZE(RQUEST_QUEUE_LEN(isp)));
494: }
495: if (progress >= 1) {
496: bus_dmamem_free(isp->isp_dmatag, &reqseg, reqrs);
497: }
498:
499: for (i = 0; i < isp->isp_maxcmds; i++) {
500: bus_dmamap_destroy(isp->isp_dmatag, sbc->sbus_dmamap[i]);
501: }
502: free(sbc->sbus_dmamap, M_DEVBUF);
503: free(isp->isp_xflist, M_DEVBUF);
504: isp->isp_xflist = NULL;
505: sbc->sbus_dmamap = NULL;
506: return (1);
507: }
508:
509: /*
510: * Map a DMA request.
511: * We're guaranteed that rq->req_handle is a value from 1 to isp->isp_maxcmds.
512: */
513:
514: static int
515: isp_sbus_dmasetup(struct ispsoftc *isp, XS_T *xs, ispreq_t *rq,
516: u_int16_t *nxtip, u_int16_t optr)
517: {
518: struct isp_sbussoftc *sbc = (struct isp_sbussoftc *) isp;
519: bus_dmamap_t dmap;
520: ispreq_t *qep;
521: int cansleep = (xs->flags & SCSI_NOSLEEP) == 0;
522: int in = (xs->flags & SCSI_DATA_IN) != 0;
523:
524: qep = (ispreq_t *) ISP_QUEUE_ENTRY(isp->isp_rquest, isp->isp_reqidx);
525: if (xs->datalen == 0) {
526: rq->req_seg_count = 1;
527: goto mbxsync;
528: }
529:
530: dmap = sbc->sbus_dmamap[isp_handle_index(rq->req_handle)];
531: if (dmap->dm_nsegs != 0) {
532: panic("%s: dma map already allocated", isp->isp_name);
533: /* NOTREACHED */
534: }
535: if (bus_dmamap_load(isp->isp_dmatag, dmap, xs->data, xs->datalen,
536: NULL, (cansleep ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT) |
537: BUS_DMA_STREAMING) != 0) {
538: XS_SETERR(xs, HBA_BOTCH);
539: return (CMD_COMPLETE);
540: }
541:
542: bus_dmamap_sync(isp->isp_dmatag, dmap, 0, xs->datalen,
543: in? BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE);
544:
545: if (in) {
546: rq->req_flags |= REQFLAG_DATA_IN;
547: } else {
548: rq->req_flags |= REQFLAG_DATA_OUT;
549: }
550:
551: if (XS_CDBLEN(xs) > 12) {
552: u_int16_t onxti;
553: ispcontreq_t local, *crq = &local, *cqe;
554:
555: onxti = *nxtip;
556: cqe = (ispcontreq_t *) ISP_QUEUE_ENTRY(isp->isp_rquest, onxti);
557: *nxtip = ISP_NXT_QENTRY(onxti, RQUEST_QUEUE_LEN(isp));
558: if (*nxtip == optr) {
559: isp_prt(isp, ISP_LOGDEBUG0, "Request Queue Overflow++");
560: bus_dmamap_unload(isp->isp_dmatag, dmap);
561: XS_SETERR(xs, HBA_BOTCH);
562: return (CMD_EAGAIN);
563: }
564: rq->req_seg_count = 2;
565: MEMZERO((void *)crq, sizeof (*crq));
566: crq->req_header.rqs_entry_count = 1;
567: crq->req_header.rqs_entry_type = RQSTYPE_DATASEG;
568: crq->req_dataseg[0].ds_count = xs->datalen;
569: crq->req_dataseg[0].ds_base = dmap->dm_segs[0].ds_addr;
570: isp_put_cont_req(isp, crq, cqe);
571: MEMORYBARRIER(isp, SYNC_REQUEST, onxti, QENTRY_LEN);
572: } else {
573: rq->req_seg_count = 1;
574: rq->req_dataseg[0].ds_count = xs->datalen;
575: rq->req_dataseg[0].ds_base = dmap->dm_segs[0].ds_addr;
576: }
577:
578: mbxsync:
579: if (XS_CDBLEN(xs) > 12) {
580: isp_put_extended_request(isp,
581: (ispextreq_t *)rq, (ispextreq_t *) qep);
582: } else {
583: isp_put_request(isp, rq, qep);
584: }
585: return (CMD_QUEUED);
586: }
587:
588: static void
589: isp_sbus_dmateardown(struct ispsoftc *isp, XS_T *xs, u_int16_t handle)
590: {
591: struct isp_sbussoftc *sbc = (struct isp_sbussoftc *) isp;
592: bus_dmamap_t dmap;
593:
594: dmap = sbc->sbus_dmamap[isp_handle_index(handle)];
595:
596: if (dmap->dm_nsegs == 0) {
597: panic("%s: dma map not already allocated", isp->isp_name);
598: /* NOTREACHED */
599: }
600: bus_dmamap_sync(isp->isp_dmatag, dmap, 0,
601: xs->datalen, (xs->flags & SCSI_DATA_IN)?
602: BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);
603: bus_dmamap_unload(isp->isp_dmatag, dmap);
604: }
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