isp_sbus.c revision 1.43
1 /* $NetBSD: isp_sbus.c,v 1.43 2001/04/12 21:40:56 mjacob Exp $ */ 2 /* 3 * This driver, which is contained in NetBSD in the files: 4 * 5 * sys/dev/ic/isp.c 6 * sys/dev/ic/isp_inline.h 7 * sys/dev/ic/isp_netbsd.c 8 * sys/dev/ic/isp_netbsd.h 9 * sys/dev/ic/isp_target.c 10 * sys/dev/ic/isp_target.h 11 * sys/dev/ic/isp_tpublic.h 12 * sys/dev/ic/ispmbox.h 13 * sys/dev/ic/ispreg.h 14 * sys/dev/ic/ispvar.h 15 * sys/microcode/isp/asm_sbus.h 16 * sys/microcode/isp/asm_1040.h 17 * sys/microcode/isp/asm_1080.h 18 * sys/microcode/isp/asm_12160.h 19 * sys/microcode/isp/asm_2100.h 20 * sys/microcode/isp/asm_2200.h 21 * sys/pci/isp_pci.c 22 * sys/sbus/isp_sbus.c 23 * 24 * Is being actively maintained by Matthew Jacob (mjacob (at) netbsd.org). 25 * This driver also is shared source with FreeBSD, OpenBSD, Linux, Solaris, 26 * Linux versions. This tends to be an interesting maintenance problem. 27 * 28 * Please coordinate with Matthew Jacob on changes you wish to make here. 29 */ 30 /* 31 * SBus specific probe and attach routines for Qlogic ISP SCSI adapters. 32 * 33 * Copyright (c) 1997, 2001 by Matthew Jacob 34 * NASA AMES Research Center 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice immediately at the beginning of the file, without modification, 42 * this list of conditions, and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 48 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 50 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 51 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 52 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 53 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 54 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 55 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 56 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 57 * SUCH DAMAGE. 58 * 59 */ 60 61 #include <sys/param.h> 62 #include <sys/systm.h> 63 #include <sys/device.h> 64 #include <sys/kernel.h> 65 #include <sys/malloc.h> 66 #include <sys/queue.h> 67 68 #include <machine/bus.h> 69 #include <machine/intr.h> 70 #include <machine/autoconf.h> 71 72 #include <dev/ic/isp_netbsd.h> 73 #include <dev/microcode/isp/asm_sbus.h> 74 #include <dev/sbus/sbusvar.h> 75 #include <sys/reboot.h> 76 77 static int isp_sbus_intr(void *); 78 static u_int16_t isp_sbus_rd_reg(struct ispsoftc *, int); 79 static void isp_sbus_wr_reg (struct ispsoftc *, int, u_int16_t); 80 static int isp_sbus_mbxdma(struct ispsoftc *); 81 static int isp_sbus_dmasetup(struct ispsoftc *, XS_T *, ispreq_t *, u_int16_t *, 82 u_int16_t); 83 static void isp_sbus_dmateardown(struct ispsoftc *, XS_T *, u_int16_t); 84 85 #ifndef ISP_1000_RISC_CODE 86 #define ISP_1000_RISC_CODE NULL 87 #endif 88 89 static struct ispmdvec mdvec = { 90 isp_sbus_rd_reg, 91 isp_sbus_wr_reg, 92 isp_sbus_mbxdma, 93 isp_sbus_dmasetup, 94 isp_sbus_dmateardown, 95 NULL, 96 NULL, 97 NULL, 98 ISP_1000_RISC_CODE 99 }; 100 101 struct isp_sbussoftc { 102 struct ispsoftc sbus_isp; 103 struct sbusdev sbus_sd; 104 sdparam sbus_dev; 105 bus_space_tag_t sbus_bustag; 106 bus_dma_tag_t sbus_dmatag; 107 bus_space_handle_t sbus_reg; 108 int sbus_node; 109 int sbus_pri; 110 struct ispmdvec sbus_mdvec; 111 bus_dmamap_t *sbus_dmamap; 112 bus_dmamap_t sbus_rquest_dmamap; 113 bus_dmamap_t sbus_result_dmamap; 114 int16_t sbus_poff[_NREG_BLKS]; 115 }; 116 117 118 static int isp_match(struct device *, struct cfdata *, void *); 119 static void isp_sbus_attach(struct device *, struct device *, void *); 120 struct cfattach isp_sbus_ca = { 121 sizeof (struct isp_sbussoftc), isp_match, isp_sbus_attach 122 }; 123 124 static int 125 isp_match(struct device *parent, struct cfdata *cf, void *aux) 126 { 127 int rv; 128 #ifdef DEBUG 129 static int oneshot = 1; 130 #endif 131 struct sbus_attach_args *sa = aux; 132 133 rv = (strcmp(cf->cf_driver->cd_name, sa->sa_name) == 0 || 134 strcmp("PTI,ptisp", sa->sa_name) == 0 || 135 strcmp("ptisp", sa->sa_name) == 0 || 136 strcmp("SUNW,isp", sa->sa_name) == 0 || 137 strcmp("QLGC,isp", sa->sa_name) == 0); 138 #ifdef DEBUG 139 if (rv && oneshot) { 140 oneshot = 0; 141 printf("Qlogic ISP Driver, NetBSD (sbus) Platform Version " 142 "%d.%d Core Version %d.%d\n", 143 ISP_PLATFORM_VERSION_MAJOR, ISP_PLATFORM_VERSION_MINOR, 144 ISP_CORE_VERSION_MAJOR, ISP_CORE_VERSION_MINOR); 145 } 146 #endif 147 return (rv); 148 } 149 150 151 static void 152 isp_sbus_attach(struct device *parent, struct device *self, void *aux) 153 { 154 int freq, ispburst, sbusburst; 155 struct sbus_attach_args *sa = aux; 156 struct isp_sbussoftc *sbc = (struct isp_sbussoftc *) self; 157 struct ispsoftc *isp = &sbc->sbus_isp; 158 159 printf(" for %s\n", sa->sa_name); 160 161 sbc->sbus_bustag = sa->sa_bustag; 162 sbc->sbus_dmatag = sa->sa_dmatag; 163 if (sa->sa_nintr != 0) 164 sbc->sbus_pri = sa->sa_pri; 165 sbc->sbus_mdvec = mdvec; 166 167 if (sa->sa_npromvaddrs != 0) { 168 sbc->sbus_reg = (bus_space_handle_t)sa->sa_promvaddrs[0]; 169 } else { 170 if (sbus_bus_map(sa->sa_bustag, sa->sa_slot, sa->sa_offset, 171 sa->sa_size, BUS_SPACE_MAP_LINEAR, 0, 172 &sbc->sbus_reg) != 0) { 173 printf("%s: cannot map registers\n", self->dv_xname); 174 return; 175 } 176 } 177 sbc->sbus_node = sa->sa_node; 178 179 freq = getpropint(sa->sa_node, "clock-frequency", 0); 180 if (freq) { 181 /* 182 * Convert from HZ to MHz, rounding up. 183 */ 184 freq = (freq + 500000)/1000000; 185 #if 0 186 printf("%s: %d MHz\n", self->dv_xname, freq); 187 #endif 188 } 189 sbc->sbus_mdvec.dv_clock = freq; 190 191 /* 192 * Now figure out what the proper burst sizes, etc., to use. 193 * Unfortunately, there is no ddi_dma_burstsizes here which 194 * walks up the tree finding the limiting burst size node (if 195 * any). 196 */ 197 sbusburst = ((struct sbus_softc *)parent)->sc_burst; 198 if (sbusburst == 0) 199 sbusburst = SBUS_BURST_32 - 1; 200 ispburst = getpropint(sa->sa_node, "burst-sizes", -1); 201 if (ispburst == -1) { 202 ispburst = sbusburst; 203 } 204 ispburst &= sbusburst; 205 ispburst &= ~(1 << 7); 206 ispburst &= ~(1 << 6); 207 sbc->sbus_mdvec.dv_conf1 = 0; 208 if (ispburst & (1 << 5)) { 209 sbc->sbus_mdvec.dv_conf1 = BIU_SBUS_CONF1_FIFO_32; 210 } else if (ispburst & (1 << 4)) { 211 sbc->sbus_mdvec.dv_conf1 = BIU_SBUS_CONF1_FIFO_16; 212 } else if (ispburst & (1 << 3)) { 213 sbc->sbus_mdvec.dv_conf1 = 214 BIU_SBUS_CONF1_BURST8 | BIU_SBUS_CONF1_FIFO_8; 215 } 216 if (sbc->sbus_mdvec.dv_conf1) { 217 sbc->sbus_mdvec.dv_conf1 |= BIU_BURST_ENABLE; 218 } 219 220 /* 221 * Some early versions of the PTI SBus adapter 222 * would fail in trying to download (via poking) 223 * FW. We give up on them. 224 */ 225 if (strcmp("PTI,ptisp", sa->sa_name) == 0 || 226 strcmp("ptisp", sa->sa_name) == 0) { 227 sbc->sbus_mdvec.dv_ispfw = NULL; 228 } 229 230 isp->isp_mdvec = &sbc->sbus_mdvec; 231 isp->isp_bustype = ISP_BT_SBUS; 232 isp->isp_type = ISP_HA_SCSI_UNKNOWN; 233 isp->isp_param = &sbc->sbus_dev; 234 bzero(isp->isp_param, sizeof (sdparam)); 235 236 sbc->sbus_poff[BIU_BLOCK >> _BLK_REG_SHFT] = BIU_REGS_OFF; 237 sbc->sbus_poff[MBOX_BLOCK >> _BLK_REG_SHFT] = SBUS_MBOX_REGS_OFF; 238 sbc->sbus_poff[SXP_BLOCK >> _BLK_REG_SHFT] = SBUS_SXP_REGS_OFF; 239 sbc->sbus_poff[RISC_BLOCK >> _BLK_REG_SHFT] = SBUS_RISC_REGS_OFF; 240 sbc->sbus_poff[DMA_BLOCK >> _BLK_REG_SHFT] = DMA_REGS_OFF; 241 242 /* Establish interrupt channel */ 243 bus_intr_establish(sbc->sbus_bustag, sbc->sbus_pri, IPL_BIO, 0, 244 isp_sbus_intr, sbc); 245 sbus_establish(&sbc->sbus_sd, &sbc->sbus_isp.isp_osinfo._dev); 246 247 /* 248 * Set up logging levels. 249 */ 250 #ifdef ISP_LOGDEFAULT 251 isp->isp_dblev = ISP_LOGDEFAULT; 252 #else 253 isp->isp_dblev = ISP_LOGWARN|ISP_LOGERR; 254 if (bootverbose) 255 isp->isp_dblev |= ISP_LOGCONFIG|ISP_LOGINFO; 256 #ifdef SCSIDEBUG 257 isp->isp_dblev |= ISP_LOGDEBUG1|ISP_LOGDEBUG2; 258 #endif 259 #ifdef DEBUG 260 isp->isp_dblev |= ISP_LOGDEBUG0; 261 #endif 262 #endif 263 264 isp->isp_confopts = self->dv_cfdata->cf_flags; 265 isp->isp_role = ISP_DEFAULT_ROLES; 266 267 /* 268 * There's no tool on sparc to set NVRAM for ISPs, so ignore it. 269 */ 270 isp->isp_confopts |= ISP_CFG_NONVRAM; 271 ISP_LOCK(isp); 272 isp->isp_osinfo.no_mbox_ints = 1; 273 isp_reset(isp); 274 if (isp->isp_state != ISP_RESETSTATE) { 275 ISP_UNLOCK(isp); 276 return; 277 } 278 ENABLE_INTS(isp); 279 isp_init(isp); 280 if (isp->isp_state != ISP_INITSTATE) { 281 isp_uninit(isp); 282 ISP_UNLOCK(isp); 283 return; 284 } 285 286 /* 287 * do generic attach. 288 */ 289 ISP_UNLOCK(isp); 290 isp_attach(isp); 291 if (isp->isp_state != ISP_RUNSTATE) { 292 ISP_LOCK(isp); 293 isp_uninit(isp); 294 ISP_UNLOCK(isp); 295 } 296 } 297 298 static int 299 isp_sbus_intr(void *arg) 300 { 301 int rv; 302 struct isp_sbussoftc *sbc = (struct isp_sbussoftc *)arg; 303 bus_dmamap_sync(sbc->sbus_dmatag, sbc->sbus_result_dmamap, 0, 304 sbc->sbus_result_dmamap->dm_mapsize, BUS_DMASYNC_POSTREAD); 305 sbc->sbus_isp.isp_osinfo.onintstack = 1; 306 rv = isp_intr(arg); 307 sbc->sbus_isp.isp_osinfo.onintstack = 0; 308 return (rv); 309 } 310 311 static u_int16_t 312 isp_sbus_rd_reg(struct ispsoftc *isp, int regoff) 313 { 314 struct isp_sbussoftc *sbc = (struct isp_sbussoftc *) isp; 315 int offset = sbc->sbus_poff[(regoff & _BLK_REG_MASK) >> _BLK_REG_SHFT]; 316 offset += (regoff & 0xff); 317 return (bus_space_read_2(sbc->sbus_bustag, sbc->sbus_reg, offset)); 318 } 319 320 static void 321 isp_sbus_wr_reg(struct ispsoftc *isp, int regoff, u_int16_t val) 322 { 323 struct isp_sbussoftc *sbc = (struct isp_sbussoftc *) isp; 324 int offset = sbc->sbus_poff[(regoff & _BLK_REG_MASK) >> _BLK_REG_SHFT]; 325 offset += (regoff & 0xff); 326 bus_space_write_2(sbc->sbus_bustag, sbc->sbus_reg, offset, val); 327 } 328 329 static int 330 isp_sbus_mbxdma(struct ispsoftc *isp) 331 { 332 struct isp_sbussoftc *sbc = (struct isp_sbussoftc *) isp; 333 bus_dma_tag_t dmatag = sbc->sbus_dmatag; 334 bus_dma_segment_t reqseg, rspseg; 335 int reqrs, rsprs, i, progress; 336 size_t n; 337 bus_size_t len; 338 339 if (isp->isp_rquest_dma) 340 return (0); 341 342 n = sizeof (XS_T **) * isp->isp_maxcmds; 343 isp->isp_xflist = (XS_T **) malloc(n, M_DEVBUF, M_WAITOK); 344 if (isp->isp_xflist == NULL) { 345 isp_prt(isp, ISP_LOGERR, "cannot alloc xflist array"); 346 return (1); 347 } 348 bzero(isp->isp_xflist, n); 349 n = sizeof (bus_dmamap_t) * isp->isp_maxcmds; 350 sbc->sbus_dmamap = (bus_dmamap_t *) malloc(n, M_DEVBUF, M_WAITOK); 351 if (sbc->sbus_dmamap == NULL) { 352 free(isp->isp_xflist, M_DEVBUF); 353 isp->isp_xflist = NULL; 354 isp_prt(isp, ISP_LOGERR, "cannot alloc dmamap array"); 355 return (1); 356 } 357 for (i = 0; i < isp->isp_maxcmds; i++) { 358 /* Allocate a DMA handle */ 359 if (bus_dmamap_create(dmatag, MAXPHYS, 1, MAXPHYS, 0, 360 BUS_DMA_NOWAIT, &sbc->sbus_dmamap[i]) != 0) { 361 isp_prt(isp, ISP_LOGERR, "cmd DMA maps create error"); 362 break; 363 } 364 } 365 if (i < isp->isp_maxcmds) { 366 while (--i >= 0) { 367 bus_dmamap_destroy(dmatag, sbc->sbus_dmamap[i]); 368 } 369 free(isp->isp_xflist, M_DEVBUF); 370 free(sbc->sbus_dmamap, M_DEVBUF); 371 isp->isp_xflist = NULL; 372 sbc->sbus_dmamap = NULL; 373 return (1); 374 } 375 376 /* 377 * Allocate and map the request and response queues 378 */ 379 progress = 0; 380 len = ISP_QUEUE_SIZE(RQUEST_QUEUE_LEN(isp)); 381 if (bus_dmamem_alloc(dmatag, len, 0, 0, &reqseg, 1, &reqrs, 382 BUS_DMA_NOWAIT)) { 383 goto dmafail; 384 } 385 progress++; 386 if (bus_dmamem_map(dmatag, &reqseg, reqrs, len, 387 (caddr_t *)&isp->isp_rquest, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) { 388 goto dmafail; 389 } 390 progress++; 391 if (bus_dmamap_create(dmatag, len, 1, len, 0, BUS_DMA_NOWAIT, 392 &sbc->sbus_rquest_dmamap) != 0) { 393 goto dmafail; 394 } 395 progress++; 396 if (bus_dmamap_load(dmatag, sbc->sbus_rquest_dmamap, 397 isp->isp_rquest, len, NULL, BUS_DMA_NOWAIT) != 0) { 398 goto dmafail; 399 } 400 progress++; 401 isp->isp_rquest_dma = sbc->sbus_rquest_dmamap->dm_segs[0].ds_addr; 402 403 len = ISP_QUEUE_SIZE(RESULT_QUEUE_LEN(isp)); 404 if (bus_dmamem_alloc(dmatag, len, 0, 0, &rspseg, 1, &rsprs, 405 BUS_DMA_NOWAIT)) { 406 goto dmafail; 407 } 408 progress++; 409 if (bus_dmamem_map(dmatag, &rspseg, rsprs, len, 410 (caddr_t *)&isp->isp_result, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) { 411 goto dmafail; 412 } 413 progress++; 414 if (bus_dmamap_create(dmatag, len, 1, len, 0, BUS_DMA_NOWAIT, 415 &sbc->sbus_result_dmamap) != 0) { 416 goto dmafail; 417 } 418 progress++; 419 if (bus_dmamap_load(dmatag, sbc->sbus_result_dmamap, 420 isp->isp_result, len, NULL, BUS_DMA_NOWAIT) != 0) { 421 goto dmafail; 422 } 423 isp->isp_result_dma = sbc->sbus_result_dmamap->dm_segs[0].ds_addr; 424 425 return (0); 426 427 dmafail: 428 isp_prt(isp, ISP_LOGERR, "Mailbox DMA Setup Failure"); 429 430 if (progress >= 8) { 431 bus_dmamap_unload(dmatag, sbc->sbus_result_dmamap); 432 } 433 if (progress >= 7) { 434 bus_dmamap_destroy(dmatag, sbc->sbus_result_dmamap); 435 } 436 if (progress >= 6) { 437 bus_dmamem_unmap(dmatag, 438 isp->isp_result, ISP_QUEUE_SIZE(RESULT_QUEUE_LEN(isp))); 439 } 440 if (progress >= 5) { 441 bus_dmamem_free(dmatag, &rspseg, rsprs); 442 } 443 444 if (progress >= 4) { 445 bus_dmamap_unload(dmatag, sbc->sbus_rquest_dmamap); 446 } 447 if (progress >= 3) { 448 bus_dmamap_destroy(dmatag, sbc->sbus_rquest_dmamap); 449 } 450 if (progress >= 2) { 451 bus_dmamem_unmap(dmatag, 452 isp->isp_rquest, ISP_QUEUE_SIZE(RQUEST_QUEUE_LEN(isp))); 453 } 454 if (progress >= 1) { 455 bus_dmamem_free(dmatag, &reqseg, reqrs); 456 } 457 458 for (i = 0; i < isp->isp_maxcmds; i++) { 459 bus_dmamap_destroy(dmatag, sbc->sbus_dmamap[i]); 460 } 461 free(sbc->sbus_dmamap, M_DEVBUF); 462 free(isp->isp_xflist, M_DEVBUF); 463 isp->isp_xflist = NULL; 464 sbc->sbus_dmamap = NULL; 465 return (1); 466 } 467 468 /* 469 * Map a DMA request. 470 * We're guaranteed that rq->req_handle is a value from 1 to isp->isp_maxcmds. 471 */ 472 473 static int 474 isp_sbus_dmasetup(struct ispsoftc *isp, XS_T *xs, ispreq_t *rq, 475 u_int16_t *iptrp, u_int16_t optr) 476 { 477 struct isp_sbussoftc *sbc = (struct isp_sbussoftc *) isp; 478 bus_dmamap_t dmap; 479 ispcontreq_t *crq; 480 int cansleep = (xs->xs_control & XS_CTL_NOSLEEP) == 0; 481 int in = (xs->xs_control & XS_CTL_DATA_IN) != 0; 482 483 if (xs->datalen == 0) { 484 rq->req_seg_count = 1; 485 goto mbxsync; 486 } 487 488 dmap = sbc->sbus_dmamap[isp_handle_index(rq->req_handle)]; 489 if (dmap->dm_nsegs != 0) { 490 panic("%s: dma map already allocated\n", isp->isp_name); 491 /* NOTREACHED */ 492 } 493 if (bus_dmamap_load(sbc->sbus_dmatag, dmap, xs->data, xs->datalen, 494 NULL, (cansleep ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT) | 495 BUS_DMA_STREAMING) != 0) { 496 XS_SETERR(xs, HBA_BOTCH); 497 return (CMD_COMPLETE); 498 } 499 500 bus_dmamap_sync(sbc->sbus_dmatag, dmap, 0, xs->datalen, 501 in? BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE); 502 503 if (in) { 504 rq->req_flags |= REQFLAG_DATA_IN; 505 } else { 506 rq->req_flags |= REQFLAG_DATA_OUT; 507 } 508 509 if (XS_CDBLEN(xs) > 12) { 510 crq = (ispcontreq_t *) ISP_QUEUE_ENTRY(isp->isp_rquest, *iptrp); 511 *iptrp = ISP_NXT_QENTRY(*iptrp, RQUEST_QUEUE_LEN(isp)); 512 if (*iptrp == optr) { 513 isp_prt(isp, ISP_LOGDEBUG0, "Request Queue Overflow++"); 514 bus_dmamap_unload(sbc->sbus_dmatag, dmap); 515 XS_SETERR(xs, HBA_BOTCH); 516 return (CMD_EAGAIN); 517 } 518 rq->req_seg_count = 2; 519 rq->req_dataseg[0].ds_count = 0; 520 rq->req_dataseg[0].ds_base = 0; 521 bzero((void *)crq, sizeof (*crq)); 522 crq->req_header.rqs_entry_count = 1; 523 crq->req_header.rqs_entry_type = RQSTYPE_DATASEG; 524 crq->req_dataseg[0].ds_count = xs->datalen; 525 crq->req_dataseg[0].ds_base = dmap->dm_segs[0].ds_addr; 526 ISP_SBUSIFY_ISPHDR(isp, &crq->req_header) 527 } else { 528 rq->req_dataseg[0].ds_count = xs->datalen; 529 rq->req_dataseg[0].ds_base = dmap->dm_segs[0].ds_addr; 530 rq->req_seg_count = 1; 531 } 532 533 mbxsync: 534 ISP_SWIZZLE_REQUEST(isp, rq); 535 bus_dmamap_sync(sbc->sbus_dmatag, sbc->sbus_rquest_dmamap, 0, 536 sbc->sbus_rquest_dmamap->dm_mapsize, BUS_DMASYNC_PREWRITE); 537 return (CMD_QUEUED); 538 } 539 540 static void 541 isp_sbus_dmateardown(struct ispsoftc *isp, XS_T *xs, u_int16_t handle) 542 { 543 struct isp_sbussoftc *sbc = (struct isp_sbussoftc *) isp; 544 bus_dmamap_t dmap; 545 546 dmap = sbc->sbus_dmamap[isp_handle_index(handle)]; 547 548 if (dmap->dm_nsegs == 0) { 549 panic("%s: dma map not already allocated\n", isp->isp_name); 550 /* NOTREACHED */ 551 } 552 bus_dmamap_sync(sbc->sbus_dmatag, dmap, 0, 553 xs->datalen, (xs->xs_control & XS_CTL_DATA_IN)? 554 BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE); 555 bus_dmamap_unload(sbc->sbus_dmatag, dmap); 556 } 557
Indexes created Tue Oct 21 08:09:48 GMT 2025