isp_sbus.c revision 1.38
1 /* $NetBSD: isp_sbus.c,v 1.38 2001/02/25 01:44:02 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 __P((void *)); 78 static u_int16_t isp_sbus_rd_reg __P((struct ispsoftc *, int)); 79 static void isp_sbus_wr_reg __P((struct ispsoftc *, int, u_int16_t)); 80 static int isp_sbus_mbxdma __P((struct ispsoftc *)); 81 static int isp_sbus_dmasetup __P((struct ispsoftc *, struct scsipi_xfer *, 82 ispreq_t *, u_int16_t *, u_int16_t)); 83 static void isp_sbus_dmateardown __P((struct ispsoftc *, struct scsipi_xfer *, 84 u_int32_t)); 85 86 #ifndef ISP_1000_RISC_CODE 87 #define ISP_1000_RISC_CODE NULL 88 #endif 89 90 static struct ispmdvec mdvec = { 91 isp_sbus_rd_reg, 92 isp_sbus_wr_reg, 93 isp_sbus_mbxdma, 94 isp_sbus_dmasetup, 95 isp_sbus_dmateardown, 96 NULL, 97 NULL, 98 NULL, 99 ISP_1000_RISC_CODE 100 }; 101 102 struct isp_sbussoftc { 103 struct ispsoftc sbus_isp; 104 struct sbusdev sbus_sd; 105 sdparam sbus_dev; 106 bus_space_tag_t sbus_bustag; 107 bus_dma_tag_t sbus_dmatag; 108 bus_space_handle_t sbus_reg; 109 int sbus_node; 110 int sbus_pri; 111 struct ispmdvec sbus_mdvec; 112 bus_dmamap_t *sbus_dmamap; 113 bus_dmamap_t sbus_rquest_dmamap; 114 bus_dmamap_t sbus_result_dmamap; 115 int16_t sbus_poff[_NREG_BLKS]; 116 }; 117 118 119 static int isp_match __P((struct device *, struct cfdata *, void *)); 120 static void isp_sbus_attach __P((struct device *, struct device *, void *)); 121 struct cfattach isp_sbus_ca = { 122 sizeof (struct isp_sbussoftc), isp_match, isp_sbus_attach 123 }; 124 125 static int 126 isp_match(parent, cf, aux) 127 struct device *parent; 128 struct cfdata *cf; 129 void *aux; 130 { 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(parent, self, aux) 157 struct device *parent, *self; 158 void *aux; 159 { 160 int freq, ispburst, sbusburst; 161 struct sbus_attach_args *sa = aux; 162 struct isp_sbussoftc *sbc = (struct isp_sbussoftc *) self; 163 struct ispsoftc *isp = &sbc->sbus_isp; 164 165 printf(" for %s\n", sa->sa_name); 166 167 sbc->sbus_bustag = sa->sa_bustag; 168 sbc->sbus_dmatag = sa->sa_dmatag; 169 if (sa->sa_nintr != 0) 170 sbc->sbus_pri = sa->sa_pri; 171 sbc->sbus_mdvec = mdvec; 172 173 if (sa->sa_npromvaddrs != 0) { 174 sbc->sbus_reg = (bus_space_handle_t)sa->sa_promvaddrs[0]; 175 } else { 176 if (sbus_bus_map(sa->sa_bustag, sa->sa_slot, sa->sa_offset, 177 sa->sa_size, BUS_SPACE_MAP_LINEAR, 0, 178 &sbc->sbus_reg) != 0) { 179 printf("%s: cannot map registers\n", self->dv_xname); 180 return; 181 } 182 } 183 sbc->sbus_node = sa->sa_node; 184 185 freq = getpropint(sa->sa_node, "clock-frequency", 0); 186 if (freq) { 187 /* 188 * Convert from HZ to MHz, rounding up. 189 */ 190 freq = (freq + 500000)/1000000; 191 #if 0 192 printf("%s: %d MHz\n", self->dv_xname, freq); 193 #endif 194 } 195 sbc->sbus_mdvec.dv_clock = freq; 196 197 /* 198 * Now figure out what the proper burst sizes, etc., to use. 199 * Unfortunately, there is no ddi_dma_burstsizes here which 200 * walks up the tree finding the limiting burst size node (if 201 * any). 202 */ 203 sbusburst = ((struct sbus_softc *)parent)->sc_burst; 204 if (sbusburst == 0) 205 sbusburst = SBUS_BURST_32 - 1; 206 ispburst = getpropint(sa->sa_node, "burst-sizes", -1); 207 if (ispburst == -1) { 208 ispburst = sbusburst; 209 } 210 ispburst &= sbusburst; 211 ispburst &= ~(1 << 7); 212 ispburst &= ~(1 << 6); 213 sbc->sbus_mdvec.dv_conf1 = 0; 214 if (ispburst & (1 << 5)) { 215 sbc->sbus_mdvec.dv_conf1 = BIU_SBUS_CONF1_FIFO_32; 216 } else if (ispburst & (1 << 4)) { 217 sbc->sbus_mdvec.dv_conf1 = BIU_SBUS_CONF1_FIFO_16; 218 } else if (ispburst & (1 << 3)) { 219 sbc->sbus_mdvec.dv_conf1 = 220 BIU_SBUS_CONF1_BURST8 | BIU_SBUS_CONF1_FIFO_8; 221 } 222 if (sbc->sbus_mdvec.dv_conf1) { 223 sbc->sbus_mdvec.dv_conf1 |= BIU_BURST_ENABLE; 224 } 225 226 /* 227 * Some early versions of the PTI SBus adapter 228 * would fail in trying to download (via poking) 229 * FW. We give up on them. 230 */ 231 if (strcmp("PTI,ptisp", sa->sa_name) == 0 || 232 strcmp("ptisp", sa->sa_name) == 0) { 233 sbc->sbus_mdvec.dv_ispfw = NULL; 234 } 235 236 isp->isp_mdvec = &sbc->sbus_mdvec; 237 isp->isp_bustype = ISP_BT_SBUS; 238 isp->isp_type = ISP_HA_SCSI_UNKNOWN; 239 isp->isp_param = &sbc->sbus_dev; 240 bzero(isp->isp_param, sizeof (sdparam)); 241 242 sbc->sbus_poff[BIU_BLOCK >> _BLK_REG_SHFT] = BIU_REGS_OFF; 243 sbc->sbus_poff[MBOX_BLOCK >> _BLK_REG_SHFT] = SBUS_MBOX_REGS_OFF; 244 sbc->sbus_poff[SXP_BLOCK >> _BLK_REG_SHFT] = SBUS_SXP_REGS_OFF; 245 sbc->sbus_poff[RISC_BLOCK >> _BLK_REG_SHFT] = SBUS_RISC_REGS_OFF; 246 sbc->sbus_poff[DMA_BLOCK >> _BLK_REG_SHFT] = DMA_REGS_OFF; 247 248 /* Establish interrupt channel */ 249 bus_intr_establish(sbc->sbus_bustag, sbc->sbus_pri, IPL_BIO, 0, 250 isp_sbus_intr, sbc); 251 sbus_establish(&sbc->sbus_sd, &sbc->sbus_isp.isp_osinfo._dev); 252 253 /* 254 * Set up logging levels. 255 */ 256 #ifdef ISP_LOGDEFAULT 257 isp->isp_dblev = ISP_LOGDEFAULT; 258 #else 259 isp->isp_dblev = ISP_LOGWARN|ISP_LOGERR; 260 if (bootverbose) 261 isp->isp_dblev |= ISP_LOGCONFIG|ISP_LOGINFO; 262 #ifdef SCSIDEBUG 263 isp->isp_dblev |= ISP_LOGDEBUG1|ISP_LOGDEBUG2; 264 #endif 265 #ifdef DEBUG 266 isp->isp_dblev |= ISP_LOGDEBUG0; 267 #endif 268 #endif 269 270 isp->isp_confopts = self->dv_cfdata->cf_flags; 271 isp->isp_role = ISP_DEFAULT_ROLES; 272 273 /* 274 * There's no tool on sparc to set NVRAM for ISPs, so ignore it. 275 */ 276 isp->isp_confopts |= ISP_CFG_NONVRAM; 277 ISP_LOCK(isp); 278 isp->isp_osinfo.no_mbox_ints = 1; 279 isp_reset(isp); 280 if (isp->isp_state != ISP_RESETSTATE) { 281 ISP_UNLOCK(isp); 282 return; 283 } 284 ENABLE_INTS(isp); 285 isp_init(isp); 286 if (isp->isp_state != ISP_INITSTATE) { 287 isp_uninit(isp); 288 ISP_UNLOCK(isp); 289 return; 290 } 291 292 /* 293 * do generic attach. 294 */ 295 ISP_UNLOCK(isp); 296 isp_attach(isp); 297 if (isp->isp_state != ISP_RUNSTATE) { 298 ISP_LOCK(isp); 299 isp_uninit(isp); 300 ISP_UNLOCK(isp); 301 } 302 } 303 304 static int 305 isp_sbus_intr(arg) 306 void *arg; 307 { 308 int rv; 309 struct isp_sbussoftc *sbc = (struct isp_sbussoftc *)arg; 310 bus_dmamap_sync(sbc->sbus_dmatag, sbc->sbus_result_dmamap, 0, 311 sbc->sbus_result_dmamap->dm_mapsize, BUS_DMASYNC_POSTREAD); 312 sbc->sbus_isp.isp_osinfo.onintstack = 1; 313 rv = isp_intr(arg); 314 sbc->sbus_isp.isp_osinfo.onintstack = 0; 315 return (rv); 316 } 317 318 static u_int16_t 319 isp_sbus_rd_reg(isp, regoff) 320 struct ispsoftc *isp; 321 int regoff; 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 return (bus_space_read_2(sbc->sbus_bustag, sbc->sbus_reg, offset)); 327 } 328 329 static void 330 isp_sbus_wr_reg(isp, regoff, val) 331 struct ispsoftc *isp; 332 int regoff; 333 u_int16_t val; 334 { 335 struct isp_sbussoftc *sbc = (struct isp_sbussoftc *) isp; 336 int offset = sbc->sbus_poff[(regoff & _BLK_REG_MASK) >> _BLK_REG_SHFT]; 337 offset += (regoff & 0xff); 338 bus_space_write_2(sbc->sbus_bustag, sbc->sbus_reg, offset, val); 339 } 340 341 static int 342 isp_sbus_mbxdma(isp) 343 struct ispsoftc *isp; 344 { 345 struct isp_sbussoftc *sbc = (struct isp_sbussoftc *) isp; 346 bus_dma_tag_t dmatag = sbc->sbus_dmatag; 347 bus_dma_segment_t seg; 348 int rs, i; 349 size_t n; 350 bus_size_t len; 351 352 if (isp->isp_rquest_dma) 353 return (0); 354 355 n = sizeof (XS_T **) * isp->isp_maxcmds; 356 isp->isp_xflist = (XS_T **) malloc(n, M_DEVBUF, M_WAITOK); 357 if (isp->isp_xflist == NULL) { 358 isp_prt(isp, ISP_LOGERR, "cannot alloc xflist array"); 359 return (1); 360 } 361 bzero(isp->isp_xflist, n); 362 n = sizeof (bus_dmamap_t) * isp->isp_maxcmds; 363 sbc->sbus_dmamap = (bus_dmamap_t *) malloc(n, M_DEVBUF, M_WAITOK); 364 if (sbc->sbus_dmamap == NULL) { 365 free(isp->isp_xflist, M_DEVBUF); 366 isp->isp_xflist = NULL; 367 isp_prt(isp, ISP_LOGERR, "cannot alloc dmamap array"); 368 return (1); 369 } 370 for (i = 0; i < isp->isp_maxcmds; i++) { 371 /* Allocate a DMA handle */ 372 if (bus_dmamap_create(dmatag, MAXPHYS, 1, MAXPHYS, 0, 373 BUS_DMA_NOWAIT, &sbc->sbus_dmamap[i]) != 0) { 374 isp_prt(isp, ISP_LOGERR, "cmd DMA maps create error"); 375 break; 376 } 377 } 378 if (i < isp->isp_maxcmds) { 379 while (--i >= 0) { 380 bus_dmamap_destroy(dmatag, sbc->sbus_dmamap[i]); 381 } 382 free(isp->isp_xflist, M_DEVBUF); 383 free(sbc->sbus_dmamap, M_DEVBUF); 384 isp->isp_xflist = NULL; 385 sbc->sbus_dmamap = NULL; 386 return (1); 387 } 388 389 /* 390 * Allocate and map the request queue. 391 */ 392 len = ISP_QUEUE_SIZE(RQUEST_QUEUE_LEN(isp)); 393 /* Allocate DMA map */ 394 if (bus_dmamap_create(dmatag, len, 1, len, 0, BUS_DMA_NOWAIT, 395 &sbc->sbus_rquest_dmamap) != 0) { 396 goto dmafail; 397 } 398 399 /* Allocate DMA buffer */ 400 if (bus_dmamem_alloc(dmatag, len, 0, 0, &seg, 1, &rs, BUS_DMA_NOWAIT)) { 401 goto dmafail; 402 } 403 404 /* Load the buffer */ 405 if (bus_dmamap_load_raw(dmatag, sbc->sbus_rquest_dmamap, 406 &seg, rs, len, BUS_DMA_NOWAIT) != 0) { 407 bus_dmamem_free(dmatag, &seg, rs); 408 goto dmafail; 409 } 410 isp->isp_rquest_dma = sbc->sbus_rquest_dmamap->dm_segs[0].ds_addr; 411 412 /* Map DMA buffer in CPU addressable space */ 413 if (bus_dmamem_map(dmatag, &seg, rs, len, (caddr_t *)&isp->isp_rquest, 414 BUS_DMA_NOWAIT)) { 415 bus_dmamap_unload(dmatag, sbc->sbus_rquest_dmamap); 416 bus_dmamem_free(dmatag, &seg, rs); 417 goto dmafail; 418 } 419 420 /* 421 * Allocate and map the result queue. 422 */ 423 len = ISP_QUEUE_SIZE(RESULT_QUEUE_LEN(isp)); 424 /* Allocate DMA map */ 425 if (bus_dmamap_create(dmatag, len, 1, len, 0, BUS_DMA_NOWAIT, 426 &sbc->sbus_result_dmamap) != 0) { 427 goto dmafail; 428 } 429 430 /* Allocate DMA buffer */ 431 if (bus_dmamem_alloc(dmatag, len, 0, 0, &seg, 1, &rs, BUS_DMA_NOWAIT)) { 432 goto dmafail; 433 } 434 435 /* Load the buffer */ 436 if (bus_dmamap_load_raw(dmatag, sbc->sbus_result_dmamap, 437 &seg, rs, len, BUS_DMA_NOWAIT|BUS_DMA_COHERENT) != 0) { 438 bus_dmamem_free(dmatag, &seg, rs); 439 goto dmafail; 440 } 441 442 /* Map DMA buffer in CPU addressable space */ 443 if (bus_dmamem_map(dmatag, &seg, rs, len, (caddr_t *)&isp->isp_result, 444 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) { 445 bus_dmamap_unload(dmatag, sbc->sbus_result_dmamap); 446 bus_dmamem_free(dmatag, &seg, rs); 447 goto dmafail; 448 } 449 isp->isp_result_dma = sbc->sbus_result_dmamap->dm_segs[0].ds_addr; 450 451 return (0); 452 453 dmafail: 454 for (i = 0; i < isp->isp_maxcmds; i++) { 455 bus_dmamap_destroy(dmatag, sbc->sbus_dmamap[i]); 456 } 457 free(sbc->sbus_dmamap, M_DEVBUF); 458 free(isp->isp_xflist, M_DEVBUF); 459 isp->isp_xflist = NULL; 460 sbc->sbus_dmamap = NULL; 461 return (1); 462 } 463 464 /* 465 * Map a DMA request. 466 * We're guaranteed that rq->req_handle is a value from 1 to isp->isp_maxcmds. 467 */ 468 469 static int 470 isp_sbus_dmasetup(isp, xs, rq, iptrp, optr) 471 struct ispsoftc *isp; 472 struct scsipi_xfer *xs; 473 ispreq_t *rq; 474 u_int16_t *iptrp; 475 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) != 0) { 495 XS_SETERR(xs, HBA_BOTCH); 496 return (CMD_COMPLETE); 497 } 498 499 bus_dmamap_sync(sbc->sbus_dmatag, dmap, 0, xs->datalen, 500 in? BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE); 501 502 if (in) { 503 rq->req_flags |= REQFLAG_DATA_IN; 504 } else { 505 rq->req_flags |= REQFLAG_DATA_OUT; 506 } 507 508 if (XS_CDBLEN(xs) > 12) { 509 crq = (ispcontreq_t *) ISP_QUEUE_ENTRY(isp->isp_rquest, *iptrp); 510 *iptrp = ISP_NXT_QENTRY(*iptrp, RQUEST_QUEUE_LEN(isp)); 511 if (*iptrp == optr) { 512 isp_prt(isp, ISP_LOGDEBUG0, "Request Queue Overflow++"); 513 bus_dmamap_unload(sbc->sbus_dmatag, dmap); 514 XS_SETERR(xs, HBA_BOTCH); 515 return (CMD_EAGAIN); 516 } 517 rq->req_seg_count = 2; 518 rq->req_dataseg[0].ds_count = 0; 519 rq->req_dataseg[0].ds_base = 0; 520 bzero((void *)crq, sizeof (*crq)); 521 crq->req_header.rqs_entry_count = 1; 522 crq->req_header.rqs_entry_type = RQSTYPE_DATASEG; 523 crq->req_dataseg[0].ds_count = xs->datalen; 524 crq->req_dataseg[0].ds_base = dmap->dm_segs[0].ds_addr; 525 ISP_SBUSIFY_ISPHDR(isp, &crq->req_header) 526 } else { 527 rq->req_dataseg[0].ds_count = xs->datalen; 528 rq->req_dataseg[0].ds_base = dmap->dm_segs[0].ds_addr; 529 rq->req_seg_count = 1; 530 } 531 532 mbxsync: 533 ISP_SWIZZLE_REQUEST(isp, rq); 534 bus_dmamap_sync(sbc->sbus_dmatag, sbc->sbus_rquest_dmamap, 0, 535 sbc->sbus_rquest_dmamap->dm_mapsize, BUS_DMASYNC_PREWRITE); 536 return (CMD_QUEUED); 537 } 538 539 static void 540 isp_sbus_dmateardown(isp, xs, handle) 541 struct ispsoftc *isp; 542 struct scsipi_xfer *xs; 543 u_int32_t handle; 544 { 545 struct isp_sbussoftc *sbc = (struct isp_sbussoftc *) isp; 546 bus_dmamap_t dmap; 547 548 dmap = sbc->sbus_dmamap[isp_handle_index(handle)]; 549 550 if (dmap->dm_nsegs == 0) { 551 panic("%s: dma map not already allocated\n", isp->isp_name); 552 /* NOTREACHED */ 553 } 554 bus_dmamap_sync(sbc->sbus_dmatag, dmap, 0, 555 xs->datalen, (xs->xs_control & XS_CTL_DATA_IN)? 556 BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE); 557 bus_dmamap_unload(sbc->sbus_dmatag, dmap); 558 } 559
Indexes created Tue Oct 21 12:09:54 GMT 2025