Annotation of sys/arch/alpha/isa/isadma_bounce.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: isadma_bounce.c,v 1.6 2006/05/12 20:48:19 brad Exp $ */
! 2: /* $NetBSD: isadma_bounce.c,v 1.3 2000/06/29 09:02:57 mrg Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1996, 1997, 1998, 2000 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
! 10: * NASA Ames Research Center.
! 11: *
! 12: * Redistribution and use in source and binary forms, with or without
! 13: * modification, are permitted provided that the following conditions
! 14: * are met:
! 15: * 1. Redistributions of source code must retain the above copyright
! 16: * notice, this list of conditions and the following disclaimer.
! 17: * 2. Redistributions in binary form must reproduce the above copyright
! 18: * notice, this list of conditions and the following disclaimer in the
! 19: * documentation and/or other materials provided with the distribution.
! 20: * 3. All advertising materials mentioning features or use of this software
! 21: * must display the following acknowledgement:
! 22: * This product includes software developed by the NetBSD
! 23: * Foundation, Inc. and its contributors.
! 24: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 25: * contributors may be used to endorse or promote products derived
! 26: * from this software without specific prior written permission.
! 27: *
! 28: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 29: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 30: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 31: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 32: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 33: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 34: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 35: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 36: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 37: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 38: * POSSIBILITY OF SUCH DAMAGE.
! 39: */
! 40:
! 41: #define _ALPHA_BUS_DMA_PRIVATE
! 42: #include <sys/param.h>
! 43: #include <sys/systm.h>
! 44: #include <sys/syslog.h>
! 45: #include <sys/device.h>
! 46: #include <sys/malloc.h>
! 47: #include <sys/proc.h>
! 48: #include <sys/mbuf.h>
! 49:
! 50: #include <machine/bus.h>
! 51:
! 52: #include <dev/isa/isareg.h>
! 53: #include <dev/isa/isavar.h>
! 54:
! 55: #include <uvm/uvm_extern.h>
! 56:
! 57: extern paddr_t avail_end;
! 58:
! 59: /*
! 60: * ISA can only DMA to 0-16M.
! 61: */
! 62: #define ISA_DMA_BOUNCE_THRESHOLD (16 * 1024 * 1024)
! 63:
! 64: /*
! 65: * Cookie used by bouncing ISA DMA. A pointer to one of these is stashed
! 66: * in the DMA map.
! 67: */
! 68: struct isadma_bounce_cookie {
! 69: int id_flags; /* flags; see below */
! 70:
! 71: /*
! 72: * Information about the original buffer used during
! 73: * DMA map syncs. Note that origbuflen is only used
! 74: * for ID_BUFTYPE_LINEAR.
! 75: */
! 76: void *id_origbuf; /* pointer to orig buffer if
! 77: bouncing */
! 78: bus_size_t id_origbuflen; /* ...and size */
! 79: int id_buftype; /* type of buffer */
! 80:
! 81: void *id_bouncebuf; /* pointer to the bounce buffer */
! 82: bus_size_t id_bouncebuflen; /* ...and size */
! 83: int id_nbouncesegs; /* number of valid bounce segs */
! 84: bus_dma_segment_t id_bouncesegs[1]; /* array of bounce buffer
! 85: physical memory segments */
! 86: };
! 87:
! 88: /* id_flags */
! 89: #define ID_MIGHT_NEED_BOUNCE 0x01 /* map could need bounce buffers */
! 90: #define ID_HAS_BOUNCE 0x02 /* map currently has bounce buffers */
! 91: #define ID_IS_BOUNCING 0x04 /* map is bouncing current xfer */
! 92:
! 93: /* id_buftype */
! 94: #define ID_BUFTYPE_INVALID 0
! 95: #define ID_BUFTYPE_LINEAR 1
! 96: #define ID_BUFTYPE_MBUF 2
! 97: #define ID_BUFTYPE_UIO 3
! 98: #define ID_BUFTYPE_RAW 4
! 99:
! 100: int isadma_bounce_alloc_bouncebuf(bus_dma_tag_t, bus_dmamap_t,
! 101: bus_size_t, int);
! 102: void isadma_bounce_free_bouncebuf(bus_dma_tag_t, bus_dmamap_t);
! 103:
! 104: /*
! 105: * Create an ISA DMA map.
! 106: */
! 107: int
! 108: isadma_bounce_dmamap_create(bus_dma_tag_t t, bus_size_t size, int nsegments,
! 109: bus_size_t maxsegsz, bus_size_t boundary, int flags, bus_dmamap_t *dmamp)
! 110: {
! 111: struct isadma_bounce_cookie *cookie;
! 112: bus_dmamap_t map;
! 113: int error, cookieflags;
! 114: void *cookiestore;
! 115: size_t cookiesize;
! 116:
! 117: /* Call common function to create the basic map. */
! 118: error = _bus_dmamap_create(t, size, nsegments, maxsegsz, boundary,
! 119: flags, dmamp);
! 120: if (error)
! 121: return (error);
! 122:
! 123: map = *dmamp;
! 124: map->_dm_cookie = NULL;
! 125:
! 126: cookiesize = sizeof(*cookie);
! 127:
! 128: /*
! 129: * ISA only has 24-bits of address space. This means
! 130: * we can't DMA to pages over 16M. In order to DMA to
! 131: * arbitrary buffers, we use "bounce buffers" - pages
! 132: * in memory below the 16M boundary. On DMA reads,
! 133: * DMA happens to the bounce buffers, and is copied into
! 134: * the caller's buffer. On writes, data is copied into
! 135: * but bounce buffer, and the DMA happens from those
! 136: * pages. To software using the DMA mapping interface,
! 137: * this looks simply like a data cache.
! 138: *
! 139: * If we have more than 16M of RAM in the system, we may
! 140: * need bounce buffers. We check and remember that here.
! 141: *
! 142: * ...or, there is an opposite case. The most segments
! 143: * a transfer will require is (maxxfer / PAGE_SIZE) + 1. If
! 144: * the caller can't handle that many segments (e.g. the
! 145: * ISA DMA controller), we may have to bounce it as well.
! 146: */
! 147: cookieflags = 0;
! 148: if (avail_end > (t->_wbase + t->_wsize) ||
! 149: ((map->_dm_size / PAGE_SIZE) + 1) > map->_dm_segcnt) {
! 150: cookieflags |= ID_MIGHT_NEED_BOUNCE;
! 151: cookiesize += (sizeof(bus_dma_segment_t) *
! 152: (map->_dm_segcnt - 1));
! 153: }
! 154:
! 155: /*
! 156: * Allocate our cookie.
! 157: */
! 158: if ((cookiestore = malloc(cookiesize, M_DEVBUF,
! 159: (flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK)) == NULL) {
! 160: error = ENOMEM;
! 161: goto out;
! 162: }
! 163: memset(cookiestore, 0, cookiesize);
! 164: cookie = (struct isadma_bounce_cookie *)cookiestore;
! 165: cookie->id_flags = cookieflags;
! 166: map->_dm_cookie = cookie;
! 167:
! 168: if (cookieflags & ID_MIGHT_NEED_BOUNCE) {
! 169: /*
! 170: * Allocate the bounce pages now if the caller
! 171: * wishes us to do so.
! 172: */
! 173: if ((flags & BUS_DMA_ALLOCNOW) == 0)
! 174: goto out;
! 175:
! 176: error = isadma_bounce_alloc_bouncebuf(t, map, size, flags);
! 177: }
! 178:
! 179: out:
! 180: if (error) {
! 181: if (map->_dm_cookie != NULL)
! 182: free(map->_dm_cookie, M_DEVBUF);
! 183: _bus_dmamap_destroy(t, map);
! 184: }
! 185: return (error);
! 186: }
! 187:
! 188: /*
! 189: * Destroy an ISA DMA map.
! 190: */
! 191: void
! 192: isadma_bounce_dmamap_destroy(bus_dma_tag_t t, bus_dmamap_t map)
! 193: {
! 194: struct isadma_bounce_cookie *cookie = map->_dm_cookie;
! 195:
! 196: /*
! 197: * Free any bounce pages this map might hold.
! 198: */
! 199: if (cookie->id_flags & ID_HAS_BOUNCE)
! 200: isadma_bounce_free_bouncebuf(t, map);
! 201:
! 202: free(cookie, M_DEVBUF);
! 203: _bus_dmamap_destroy(t, map);
! 204: }
! 205:
! 206: /*
! 207: * Load an ISA DMA map with a linear buffer.
! 208: */
! 209: int
! 210: isadma_bounce_dmamap_load(bus_dma_tag_t t, bus_dmamap_t map, void *buf,
! 211: size_t buflen, struct proc *p, int flags)
! 212: {
! 213: struct isadma_bounce_cookie *cookie = map->_dm_cookie;
! 214: int error;
! 215:
! 216: /*
! 217: * Make sure that on error condition we return "no valid mappings."
! 218: */
! 219: map->dm_mapsize = 0;
! 220: map->dm_nsegs = 0;
! 221:
! 222: /*
! 223: * Try to load the map the normal way. If this errors out,
! 224: * and we can bounce, we will.
! 225: */
! 226: error = _bus_dmamap_load_direct(t, map, buf, buflen, p, flags);
! 227: if (error == 0 ||
! 228: (error != 0 && (cookie->id_flags & ID_MIGHT_NEED_BOUNCE) == 0))
! 229: return (error);
! 230:
! 231: /*
! 232: * First attempt failed; bounce it.
! 233: */
! 234:
! 235: /*
! 236: * Allocate bounce pages, if necessary.
! 237: */
! 238: if ((cookie->id_flags & ID_HAS_BOUNCE) == 0) {
! 239: error = isadma_bounce_alloc_bouncebuf(t, map, buflen, flags);
! 240: if (error)
! 241: return (error);
! 242: }
! 243:
! 244: /*
! 245: * Cache a pointer to the caller's buffer and load the DMA map
! 246: * with the bounce buffer.
! 247: */
! 248: cookie->id_origbuf = buf;
! 249: cookie->id_origbuflen = buflen;
! 250: cookie->id_buftype = ID_BUFTYPE_LINEAR;
! 251: error = _bus_dmamap_load_direct(t, map, cookie->id_bouncebuf, buflen,
! 252: p, flags);
! 253: if (error) {
! 254: /*
! 255: * Free the bounce pages, unless our resources
! 256: * are reserved for our exclusive use.
! 257: */
! 258: if ((map->_dm_flags & BUS_DMA_ALLOCNOW) == 0)
! 259: isadma_bounce_free_bouncebuf(t, map);
! 260: return (error);
! 261: }
! 262:
! 263: /* ...so isadma_bounce_dmamap_sync() knows we're bouncing */
! 264: cookie->id_flags |= ID_IS_BOUNCING;
! 265: map->_dm_window = t;
! 266: return (0);
! 267: }
! 268:
! 269: /*
! 270: * Like isadma_bounce_dmamap_load(), but for mbufs.
! 271: */
! 272: int
! 273: isadma_bounce_dmamap_load_mbuf(bus_dma_tag_t t, bus_dmamap_t map,
! 274: struct mbuf *m0, int flags)
! 275: {
! 276: struct isadma_bounce_cookie *cookie = map->_dm_cookie;
! 277: int error;
! 278:
! 279: /*
! 280: * Make sure on error condition we return "no valid mappings."
! 281: */
! 282: map->dm_mapsize = 0;
! 283: map->dm_nsegs = 0;
! 284:
! 285: #ifdef DIAGNOSTIC
! 286: if ((m0->m_flags & M_PKTHDR) == 0)
! 287: panic("isadma_bounce_dmamap_load_mbuf: no packet header");
! 288: #endif
! 289:
! 290: if (m0->m_pkthdr.len > map->_dm_size)
! 291: return (EINVAL);
! 292:
! 293: /*
! 294: * Try to load the map the normal way. If this errors out,
! 295: * and we can bounce, we will.
! 296: */
! 297: error = _bus_dmamap_load_mbuf_direct(t, map, m0, flags);
! 298: if (error == 0 ||
! 299: (error != 0 && (cookie->id_flags & ID_MIGHT_NEED_BOUNCE) == 0))
! 300: return (error);
! 301:
! 302: /*
! 303: * First attempt failed; bounce it.
! 304: */
! 305:
! 306: /*
! 307: * Allocate bounce pages, if necessary.
! 308: */
! 309: if ((cookie->id_flags & ID_HAS_BOUNCE) == 0) {
! 310: error = isadma_bounce_alloc_bouncebuf(t, map, m0->m_pkthdr.len,
! 311: flags);
! 312: if (error)
! 313: return (error);
! 314: }
! 315:
! 316: /*
! 317: * Cache a pointer to the caller's buffer and load the DMA map
! 318: * with the bounce buffer.
! 319: */
! 320: cookie->id_origbuf = m0;
! 321: cookie->id_origbuflen = m0->m_pkthdr.len; /* not really used */
! 322: cookie->id_buftype = ID_BUFTYPE_MBUF;
! 323: error = _bus_dmamap_load_direct(t, map, cookie->id_bouncebuf,
! 324: m0->m_pkthdr.len, NULL, flags);
! 325: if (error) {
! 326: /*
! 327: * Free the bounce pages, unless our resources
! 328: * are reserved for our exclusive use.
! 329: */
! 330: if ((map->_dm_flags & BUS_DMA_ALLOCNOW) == 0)
! 331: isadma_bounce_free_bouncebuf(t, map);
! 332: return (error);
! 333: }
! 334:
! 335: /* ...so isadma_bounce_dmamap_sync() knows we're bouncing */
! 336: cookie->id_flags |= ID_IS_BOUNCING;
! 337: map->_dm_window = t;
! 338: return (0);
! 339: }
! 340:
! 341: /*
! 342: * Like isadma_bounce_dmamap_load(), but for uios.
! 343: */
! 344: int
! 345: isadma_bounce_dmamap_load_uio(bus_dma_tag_t t, bus_dmamap_t map,
! 346: struct uio *uio, int flags)
! 347: {
! 348:
! 349: panic("isadma_bounce_dmamap_load_uio: not implemented");
! 350: }
! 351:
! 352: /*
! 353: * Like isadma_bounce_dmamap_load(), but for raw memory allocated with
! 354: * bus_dmamem_alloc().
! 355: */
! 356: int
! 357: isadma_bounce_dmamap_load_raw(bus_dma_tag_t t, bus_dmamap_t map,
! 358: bus_dma_segment_t *segs, int nsegs, bus_size_t size, int flags)
! 359: {
! 360:
! 361: panic("isadma_bounce_dmamap_load_raw: not implemented");
! 362: }
! 363:
! 364: /*
! 365: * Unload an ISA DMA map.
! 366: */
! 367: void
! 368: isadma_bounce_dmamap_unload(bus_dma_tag_t t, bus_dmamap_t map)
! 369: {
! 370: struct isadma_bounce_cookie *cookie = map->_dm_cookie;
! 371:
! 372: /*
! 373: * If we have bounce pages, free them, unless they're
! 374: * reserved for our exclusive use.
! 375: */
! 376: if ((cookie->id_flags & ID_HAS_BOUNCE) &&
! 377: (map->_dm_flags & BUS_DMA_ALLOCNOW) == 0)
! 378: isadma_bounce_free_bouncebuf(t, map);
! 379:
! 380: cookie->id_flags &= ~ID_IS_BOUNCING;
! 381: cookie->id_buftype = ID_BUFTYPE_INVALID;
! 382:
! 383: /*
! 384: * Do the generic bits of the unload.
! 385: */
! 386: _bus_dmamap_unload(t, map);
! 387: }
! 388:
! 389: void
! 390: isadma_bounce_dmamap_sync(bus_dma_tag_t t, bus_dmamap_t map, bus_addr_t offset,
! 391: bus_size_t len, int ops)
! 392: {
! 393: struct isadma_bounce_cookie *cookie = map->_dm_cookie;
! 394:
! 395: /*
! 396: * Mixing PRE and POST operations is not allowed.
! 397: */
! 398: if ((ops & (BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE)) != 0 &&
! 399: (ops & (BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE)) != 0)
! 400: panic("isadma_bounce_dmamap_sync: mix PRE and POST");
! 401:
! 402: #ifdef DIAGNOSTIC
! 403: if ((ops & (BUS_DMASYNC_PREWRITE|BUS_DMASYNC_POSTREAD)) != 0) {
! 404: if (offset >= map->dm_mapsize)
! 405: panic("isadma_bounce_dmamap_sync: bad offset");
! 406: if (len == 0 || (offset + len) > map->dm_mapsize)
! 407: panic("isadma_bounce_dmamap_sync: bad length");
! 408: }
! 409: #endif
! 410:
! 411: /*
! 412: * If we're not bouncing, just drain the write buffer
! 413: * and return.
! 414: */
! 415: if ((cookie->id_flags & ID_IS_BOUNCING) == 0) {
! 416: alpha_mb();
! 417: return;
! 418: }
! 419:
! 420: switch (cookie->id_buftype) {
! 421: case ID_BUFTYPE_LINEAR:
! 422: /*
! 423: * Nothing to do for pre-read.
! 424: */
! 425:
! 426: if (ops & BUS_DMASYNC_PREWRITE) {
! 427: /*
! 428: * Copy the caller's buffer to the bounce buffer.
! 429: */
! 430: memcpy((char *)cookie->id_bouncebuf + offset,
! 431: (char *)cookie->id_origbuf + offset, len);
! 432: }
! 433:
! 434: if (ops & BUS_DMASYNC_POSTREAD) {
! 435: /*
! 436: * Copy the bounce buffer to the caller's buffer.
! 437: */
! 438: memcpy((char *)cookie->id_origbuf + offset,
! 439: (char *)cookie->id_bouncebuf + offset, len);
! 440: }
! 441:
! 442: /*
! 443: * Nothing to do for post-write.
! 444: */
! 445: break;
! 446:
! 447: case ID_BUFTYPE_MBUF:
! 448: {
! 449: struct mbuf *m, *m0 = cookie->id_origbuf;
! 450: bus_size_t minlen, moff;
! 451:
! 452: /*
! 453: * Nothing to do for pre-read.
! 454: */
! 455:
! 456: if (ops & BUS_DMASYNC_PREWRITE) {
! 457: /*
! 458: * Copy the caller's buffer to the bounce buffer.
! 459: */
! 460: m_copydata(m0, offset, len,
! 461: (char *)cookie->id_bouncebuf + offset);
! 462: }
! 463:
! 464: if (ops & BUS_DMASYNC_POSTREAD) {
! 465: /*
! 466: * Copy the bounce buffer to the caller's buffer.
! 467: */
! 468: for (moff = offset, m = m0; m != NULL && len != 0;
! 469: m = m->m_next) {
! 470: /* Find the beginning mbuf. */
! 471: if (moff >= m->m_len) {
! 472: moff -= m->m_len;
! 473: continue;
! 474: }
! 475:
! 476: /*
! 477: * Now at the first mbuf to sync; nail
! 478: * each one until we have exhausted the
! 479: * length.
! 480: */
! 481: minlen = len < m->m_len - moff ?
! 482: len : m->m_len - moff;
! 483:
! 484: memcpy(mtod(m, caddr_t) + moff,
! 485: (char *)cookie->id_bouncebuf + offset,
! 486: minlen);
! 487:
! 488: moff = 0;
! 489: len -= minlen;
! 490: offset += minlen;
! 491: }
! 492: }
! 493:
! 494: /*
! 495: * Nothing to do for post-write.
! 496: */
! 497: break;
! 498: }
! 499:
! 500: case ID_BUFTYPE_UIO:
! 501: panic("isadma_bounce_dmamap_sync: ID_BUFTYPE_UIO");
! 502: break;
! 503:
! 504: case ID_BUFTYPE_RAW:
! 505: panic("isadma_bounce_dmamap_sync: ID_BUFTYPE_RAW");
! 506: break;
! 507:
! 508: case ID_BUFTYPE_INVALID:
! 509: panic("isadma_bounce_dmamap_sync: ID_BUFTYPE_INVALID");
! 510: break;
! 511:
! 512: default:
! 513: panic("isadma_bounce_dmamap_sync: unknown buffer type %d",
! 514: cookie->id_buftype);
! 515: }
! 516:
! 517: /* Drain the write buffer. */
! 518: alpha_mb();
! 519: }
! 520:
! 521: /*
! 522: * Allocate memory safe for ISA DMA.
! 523: */
! 524: int
! 525: isadma_bounce_dmamem_alloc(bus_dma_tag_t t, bus_size_t size,
! 526: bus_size_t alignment, bus_size_t boundary, bus_dma_segment_t *segs,
! 527: int nsegs, int *rsegs, int flags)
! 528: {
! 529: paddr_t high;
! 530:
! 531: if (avail_end > ISA_DMA_BOUNCE_THRESHOLD)
! 532: high = trunc_page(ISA_DMA_BOUNCE_THRESHOLD);
! 533: else
! 534: high = trunc_page(avail_end);
! 535:
! 536: return (_bus_dmamem_alloc_range(t, size, alignment, boundary,
! 537: segs, nsegs, rsegs, flags, 0, high));
! 538: }
! 539:
! 540: /**********************************************************************
! 541: * ISA DMA utility functions
! 542: **********************************************************************/
! 543:
! 544: int
! 545: isadma_bounce_alloc_bouncebuf(bus_dma_tag_t t, bus_dmamap_t map,
! 546: bus_size_t size, int flags)
! 547: {
! 548: struct isadma_bounce_cookie *cookie = map->_dm_cookie;
! 549: int error = 0;
! 550:
! 551: cookie->id_bouncebuflen = round_page(size);
! 552: error = isadma_bounce_dmamem_alloc(t, cookie->id_bouncebuflen,
! 553: PAGE_SIZE, map->_dm_boundary, cookie->id_bouncesegs,
! 554: map->_dm_segcnt, &cookie->id_nbouncesegs, flags);
! 555: if (error)
! 556: goto out;
! 557: error = _bus_dmamem_map(t, cookie->id_bouncesegs,
! 558: cookie->id_nbouncesegs, cookie->id_bouncebuflen,
! 559: (caddr_t *)&cookie->id_bouncebuf, flags);
! 560:
! 561: out:
! 562: if (error) {
! 563: _bus_dmamem_free(t, cookie->id_bouncesegs,
! 564: cookie->id_nbouncesegs);
! 565: cookie->id_bouncebuflen = 0;
! 566: cookie->id_nbouncesegs = 0;
! 567: } else
! 568: cookie->id_flags |= ID_HAS_BOUNCE;
! 569:
! 570: return (error);
! 571: }
! 572:
! 573: void
! 574: isadma_bounce_free_bouncebuf(bus_dma_tag_t t, bus_dmamap_t map)
! 575: {
! 576: struct isadma_bounce_cookie *cookie = map->_dm_cookie;
! 577:
! 578: _bus_dmamem_unmap(t, cookie->id_bouncebuf,
! 579: cookie->id_bouncebuflen);
! 580: _bus_dmamem_free(t, cookie->id_bouncesegs,
! 581: cookie->id_nbouncesegs);
! 582: cookie->id_bouncebuflen = 0;
! 583: cookie->id_nbouncesegs = 0;
! 584: cookie->id_flags &= ~ID_HAS_BOUNCE;
! 585: }
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