amr_pci.c revision 143164
1/*- 2 * Copyright (c) 1999,2000 Michael Smith 3 * Copyright (c) 2000 BSDi 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 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 AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27/*- 28 * Copyright (c) 2002 Eric Moore 29 * Copyright (c) 2002, 2004 LSI Logic Corporation 30 * All rights reserved. 31 * 32 * Redistribution and use in source and binary forms, with or without 33 * modification, are permitted provided that the following conditions 34 * are met: 35 * 1. Redistributions of source code must retain the above copyright 36 * notice, this list of conditions and the following disclaimer. 37 * 2. Redistributions in binary form must reproduce the above copyright 38 * notice, this list of conditions and the following disclaimer in the 39 * documentation and/or other materials provided with the distribution. 40 * 3. The party using or redistributing the source code and binary forms 41 * agrees to the disclaimer below and the terms and conditions set forth 42 * herein. 43 * 44 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 45 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 47 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 48 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 49 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 50 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 51 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 52 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 53 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 54 * SUCH DAMAGE. 55 */ 56 57#include <sys/cdefs.h> 58__FBSDID("$FreeBSD: head/sys/dev/amr/amr_pci.c 143164 2005-03-05 19:24:22Z imp $"); 59 60#include <sys/param.h> 61#include <sys/systm.h> 62#include <sys/kernel.h> 63#include <sys/module.h> 64 65#include <dev/amr/amr_compat.h> 66#include <sys/bus.h> 67#include <sys/conf.h> 68 69#include <machine/bus_memio.h> 70#include <machine/bus_pio.h> 71#include <machine/bus.h> 72#include <machine/resource.h> 73#include <sys/rman.h> 74 75#include <dev/pci/pcireg.h> 76#include <dev/pci/pcivar.h> 77 78#include <dev/amr/amrio.h> 79#include <dev/amr/amrreg.h> 80#include <dev/amr/amrvar.h> 81 82static int amr_pci_probe(device_t dev); 83static int amr_pci_attach(device_t dev); 84static int amr_pci_detach(device_t dev); 85static int amr_pci_shutdown(device_t dev); 86static int amr_pci_suspend(device_t dev); 87static int amr_pci_resume(device_t dev); 88static void amr_pci_intr(void *arg); 89static void amr_pci_free(struct amr_softc *sc); 90static void amr_sglist_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error); 91static int amr_sglist_map(struct amr_softc *sc); 92static void amr_setup_mbox_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error); 93static int amr_setup_mbox(struct amr_softc *sc); 94 95static device_method_t amr_methods[] = { 96 /* Device interface */ 97 DEVMETHOD(device_probe, amr_pci_probe), 98 DEVMETHOD(device_attach, amr_pci_attach), 99 DEVMETHOD(device_detach, amr_pci_detach), 100 DEVMETHOD(device_shutdown, amr_pci_shutdown), 101 DEVMETHOD(device_suspend, amr_pci_suspend), 102 DEVMETHOD(device_resume, amr_pci_resume), 103 104 DEVMETHOD(bus_print_child, bus_generic_print_child), 105 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 106 { 0, 0 } 107}; 108 109static driver_t amr_pci_driver = { 110 "amr", 111 amr_methods, 112 sizeof(struct amr_softc) 113}; 114 115static devclass_t amr_devclass; 116DRIVER_MODULE(amr, pci, amr_pci_driver, amr_devclass, 0, 0); 117 118static struct 119{ 120 int vendor; 121 int device; 122 int flag; 123#define PROBE_SIGNATURE (1<<0) 124} amr_device_ids[] = { 125 {0x101e, 0x9010, 0}, 126 {0x101e, 0x9060, 0}, 127 {0x8086, 0x1960, PROBE_SIGNATURE},/* generic i960RD, check for signature */ 128 {0x101e, 0x1960, 0}, 129 {0x1000, 0x1960, PROBE_SIGNATURE}, 130 {0x1000, 0x0407, 0}, 131 {0x1000, 0x0408, 0}, 132 {0x1000, 0x0409, 0}, 133 {0x1028, 0x000e, PROBE_SIGNATURE}, /* perc4/di i960 */ 134 {0x1028, 0x000f, 0}, /* perc4/di Verde*/ 135 {0x1028, 0x0013, 0}, /* perc4/di */ 136 {0, 0, 0} 137}; 138 139static int 140amr_pci_probe(device_t dev) 141{ 142 int i, sig; 143 144 debug_called(1); 145 146 for (i = 0; amr_device_ids[i].vendor != 0; i++) { 147 if ((pci_get_vendor(dev) == amr_device_ids[i].vendor) && 148 (pci_get_device(dev) == amr_device_ids[i].device)) { 149 150 /* do we need to test for a signature? */ 151 if (amr_device_ids[i].flag & PROBE_SIGNATURE) { 152 sig = pci_read_config(dev, AMR_CFG_SIG, 2); 153 if ((sig != AMR_SIGNATURE_1) && (sig != AMR_SIGNATURE_2)) 154 continue; 155 } 156 device_set_desc(dev, LSI_DESC_PCI); 157 return(BUS_PROBE_DEFAULT); 158 } 159 } 160 return(ENXIO); 161} 162 163static int 164amr_pci_attach(device_t dev) 165{ 166 struct amr_softc *sc; 167 int rid, rtype, error; 168 u_int32_t command; 169 170 debug_called(1); 171 172 /* 173 * Initialise softc. 174 */ 175 sc = device_get_softc(dev); 176 bzero(sc, sizeof(*sc)); 177 sc->amr_dev = dev; 178 mtx_init(&sc->amr_io_lock, "AMR IO Lock", NULL, MTX_DEF); 179 180 /* assume failure is 'not configured' */ 181 error = ENXIO; 182 183 /* 184 * Determine board type. 185 */ 186 command = pci_read_config(dev, PCIR_COMMAND, 1); 187 if ((pci_get_device(dev) == 0x1960) || (pci_get_device(dev) == 0x0407) || 188 (pci_get_device(dev) == 0x0408) || (pci_get_device(dev) == 0x0409) || 189 (pci_get_device(dev) == 0x000e) || (pci_get_device(dev) == 0x000f) || 190 (pci_get_device(dev) == 0x0013)) { 191 /* 192 * Make sure we are going to be able to talk to this board. 193 */ 194 if ((command & PCIM_CMD_MEMEN) == 0) { 195 device_printf(dev, "memory window not available\n"); 196 goto out; 197 } 198 sc->amr_type |= AMR_TYPE_QUARTZ; 199 200 } else { 201 /* 202 * Make sure we are going to be able to talk to this board. 203 */ 204 if ((command & PCIM_CMD_PORTEN) == 0) { 205 device_printf(dev, "I/O window not available\n"); 206 goto out; 207 } 208 } 209 210 /* force the busmaster enable bit on */ 211 if (!(command & PCIM_CMD_BUSMASTEREN)) { 212 device_printf(dev, "busmaster bit not set, enabling\n"); 213 command |= PCIM_CMD_BUSMASTEREN; 214 pci_write_config(dev, PCIR_COMMAND, command, 2); 215 } 216 217 /* 218 * Allocate the PCI register window. 219 */ 220 rid = PCIR_BAR(0); 221 rtype = AMR_IS_QUARTZ(sc) ? SYS_RES_MEMORY : SYS_RES_IOPORT; 222 sc->amr_reg = bus_alloc_resource_any(dev, rtype, &rid, RF_ACTIVE); 223 if (sc->amr_reg == NULL) { 224 device_printf(sc->amr_dev, "can't allocate register window\n"); 225 goto out; 226 } 227 sc->amr_btag = rman_get_bustag(sc->amr_reg); 228 sc->amr_bhandle = rman_get_bushandle(sc->amr_reg); 229 230 /* 231 * Allocate and connect our interrupt. 232 */ 233 rid = 0; 234 sc->amr_irq = bus_alloc_resource_any(sc->amr_dev, SYS_RES_IRQ, &rid, 235 RF_SHAREABLE | RF_ACTIVE); 236 if (sc->amr_irq == NULL) { 237 device_printf(sc->amr_dev, "can't allocate interrupt\n"); 238 goto out; 239 } 240 if (bus_setup_intr(sc->amr_dev, sc->amr_irq, INTR_TYPE_BIO | INTR_ENTROPY | INTR_MPSAFE, amr_pci_intr, sc, &sc->amr_intr)) { 241 device_printf(sc->amr_dev, "can't set up interrupt\n"); 242 goto out; 243 } 244 245 debug(2, "interrupt attached"); 246 247 /* assume failure is 'out of memory' */ 248 error = ENOMEM; 249 250 /* 251 * Allocate the parent bus DMA tag appropriate for PCI. 252 */ 253 if (bus_dma_tag_create(NULL, /* parent */ 254 1, 0, /* alignment, boundary */ 255 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 256 BUS_SPACE_MAXADDR, /* highaddr */ 257 NULL, NULL, /* filter, filterarg */ 258 MAXBSIZE, AMR_NSEG, /* maxsize, nsegments */ 259 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */ 260 0, /* flags */ 261 NULL, NULL, /* lockfunc, lockarg */ 262 &sc->amr_parent_dmat)) { 263 device_printf(dev, "can't allocate parent DMA tag\n"); 264 goto out; 265 } 266 267 /* 268 * Create DMA tag for mapping buffers into controller-addressable space. 269 */ 270 if (bus_dma_tag_create(sc->amr_parent_dmat, /* parent */ 271 1, 0, /* alignment, boundary */ 272 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 273 BUS_SPACE_MAXADDR, /* highaddr */ 274 NULL, NULL, /* filter, filterarg */ 275 MAXBSIZE, AMR_NSEG, /* maxsize, nsegments */ 276 MAXBSIZE, /* maxsegsize */ 277 BUS_DMA_ALLOCNOW, /* flags */ 278 busdma_lock_mutex, &sc->amr_io_lock, /* lockfunc, lockarg */ 279 &sc->amr_buffer_dmat)) { 280 device_printf(sc->amr_dev, "can't allocate buffer DMA tag\n"); 281 goto out; 282 } 283 284 debug(2, "dma tag done"); 285 286 /* 287 * Allocate and set up mailbox in a bus-visible fashion. 288 */ 289 if ((error = amr_setup_mbox(sc)) != 0) 290 goto out; 291 292 debug(2, "mailbox setup"); 293 294 /* 295 * Build the scatter/gather buffers. 296 */ 297 if (amr_sglist_map(sc)) 298 goto out; 299 300 debug(2, "s/g list mapped"); 301 302 /* 303 * Do bus-independant initialisation, bring controller online. 304 */ 305 error = amr_attach(sc); 306 307out: 308 if (error) 309 amr_pci_free(sc); 310 return(error); 311} 312 313/******************************************************************************** 314 * Disconnect from the controller completely, in preparation for unload. 315 */ 316static int 317amr_pci_detach(device_t dev) 318{ 319 struct amr_softc *sc = device_get_softc(dev); 320 int error; 321 322 debug_called(1); 323 324 if (sc->amr_state & AMR_STATE_OPEN) 325 return(EBUSY); 326 327 if ((error = amr_pci_shutdown(dev))) 328 return(error); 329 330 amr_pci_free(sc); 331 332 return(0); 333} 334 335/******************************************************************************** 336 * Bring the controller down to a dormant state and detach all child devices. 337 * 338 * This function is called before detach, system shutdown, or before performing 339 * an operation which may add or delete system disks. (Call amr_startup to 340 * resume normal operation.) 341 * 342 * Note that we can assume that the bioq on the controller is empty, as we won't 343 * allow shutdown if any device is open. 344 */ 345static int 346amr_pci_shutdown(device_t dev) 347{ 348 struct amr_softc *sc = device_get_softc(dev); 349 int i,error,s; 350 351 debug_called(1); 352 353 /* mark ourselves as in-shutdown */ 354 sc->amr_state |= AMR_STATE_SHUTDOWN; 355 356 357 /* flush controller */ 358 device_printf(sc->amr_dev, "flushing cache..."); 359 printf("%s\n", amr_flush(sc) ? "failed" : "done"); 360 361 s = splbio(); 362 error = 0; 363 364 /* delete all our child devices */ 365 for(i = 0 ; i < AMR_MAXLD; i++) { 366 if( sc->amr_drive[i].al_disk != 0) { 367 if((error = device_delete_child(sc->amr_dev,sc->amr_drive[i].al_disk)) != 0) 368 goto shutdown_out; 369 sc->amr_drive[i].al_disk = 0; 370 } 371 } 372 373 /* XXX disable interrupts? */ 374 375shutdown_out: 376 splx(s); 377 return(error); 378} 379 380/******************************************************************************** 381 * Bring the controller to a quiescent state, ready for system suspend. 382 */ 383static int 384amr_pci_suspend(device_t dev) 385{ 386 struct amr_softc *sc = device_get_softc(dev); 387 388 debug_called(1); 389 390 sc->amr_state |= AMR_STATE_SUSPEND; 391 392 /* flush controller */ 393 device_printf(sc->amr_dev, "flushing cache..."); 394 printf("%s\n", amr_flush(sc) ? "failed" : "done"); 395 396 /* XXX disable interrupts? */ 397 398 return(0); 399} 400 401/******************************************************************************** 402 * Bring the controller back to a state ready for operation. 403 */ 404static int 405amr_pci_resume(device_t dev) 406{ 407 struct amr_softc *sc = device_get_softc(dev); 408 409 debug_called(1); 410 411 sc->amr_state &= ~AMR_STATE_SUSPEND; 412 413 /* XXX enable interrupts? */ 414 415 return(0); 416} 417 418/******************************************************************************* 419 * Take an interrupt, or be poked by other code to look for interrupt-worthy 420 * status. 421 */ 422static void 423amr_pci_intr(void *arg) 424{ 425 struct amr_softc *sc = (struct amr_softc *)arg; 426 427 debug_called(2); 428 429 /* collect finished commands, queue anything waiting */ 430 mtx_lock(&sc->amr_io_lock); 431 amr_done(sc); 432 mtx_unlock(&sc->amr_io_lock); 433} 434 435/******************************************************************************** 436 * Free all of the resources associated with (sc) 437 * 438 * Should not be called if the controller is active. 439 */ 440static void 441amr_pci_free(struct amr_softc *sc) 442{ 443 u_int8_t *p; 444 445 debug_called(1); 446 447 amr_free(sc); 448 449 /* destroy data-transfer DMA tag */ 450 if (sc->amr_buffer_dmat) 451 bus_dma_tag_destroy(sc->amr_buffer_dmat); 452 453 /* free and destroy DMA memory and tag for s/g lists */ 454 if (sc->amr_sgtable) 455 bus_dmamem_free(sc->amr_sg_dmat, sc->amr_sgtable, sc->amr_sg_dmamap); 456 if (sc->amr_sg_dmat) 457 bus_dma_tag_destroy(sc->amr_sg_dmat); 458 459 /* free and destroy DMA memory and tag for mailbox */ 460 if (sc->amr_mailbox) { 461 p = (u_int8_t *)(uintptr_t)(volatile void *)sc->amr_mailbox; 462 bus_dmamem_free(sc->amr_mailbox_dmat, p - 16, sc->amr_mailbox_dmamap); 463 } 464 if (sc->amr_mailbox_dmat) 465 bus_dma_tag_destroy(sc->amr_mailbox_dmat); 466 467 /* disconnect the interrupt handler */ 468 if (sc->amr_intr) 469 bus_teardown_intr(sc->amr_dev, sc->amr_irq, sc->amr_intr); 470 if (sc->amr_irq != NULL) 471 bus_release_resource(sc->amr_dev, SYS_RES_IRQ, 0, sc->amr_irq); 472 473 /* destroy the parent DMA tag */ 474 if (sc->amr_parent_dmat) 475 bus_dma_tag_destroy(sc->amr_parent_dmat); 476 477 /* release the register window mapping */ 478 if (sc->amr_reg != NULL) 479 bus_release_resource(sc->amr_dev, 480 AMR_IS_QUARTZ(sc) ? SYS_RES_MEMORY : SYS_RES_IOPORT, 481 PCIR_BAR(0), sc->amr_reg); 482} 483 484/******************************************************************************** 485 * Allocate and map the scatter/gather table in bus space. 486 */ 487static void 488amr_sglist_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error) 489{ 490 struct amr_softc *sc = (struct amr_softc *)arg; 491 492 debug_called(1); 493 494 /* save base of s/g table's address in bus space */ 495 sc->amr_sgbusaddr = segs->ds_addr; 496} 497 498static int 499amr_sglist_map(struct amr_softc *sc) 500{ 501 size_t segsize; 502 int error; 503 504 debug_called(1); 505 506 /* 507 * Create a single tag describing a region large enough to hold all of 508 * the s/g lists we will need. 509 * 510 * Note that we could probably use AMR_LIMITCMD here, but that may become tunable. 511 */ 512 segsize = sizeof(struct amr_sgentry) * AMR_NSEG * AMR_MAXCMD; 513 error = bus_dma_tag_create(sc->amr_parent_dmat, /* parent */ 514 1, 0, /* alignment, boundary */ 515 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 516 BUS_SPACE_MAXADDR, /* highaddr */ 517 NULL, NULL, /* filter, filterarg */ 518 segsize, 1, /* maxsize, nsegments */ 519 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */ 520 0, /* flags */ 521 busdma_lock_mutex, /* lockfunc */ 522 &Giant, /* lockarg */ 523 &sc->amr_sg_dmat); 524 if (error != 0) { 525 device_printf(sc->amr_dev, "can't allocate scatter/gather DMA tag\n"); 526 return(ENOMEM); 527 } 528 529 /* 530 * Allocate enough s/g maps for all commands and permanently map them into 531 * controller-visible space. 532 * 533 * XXX this assumes we can get enough space for all the s/g maps in one 534 * contiguous slab. We may need to switch to a more complex arrangement where 535 * we allocate in smaller chunks and keep a lookup table from slot to bus address. 536 * 537 * XXX HACK ALERT: at least some controllers don't like the s/g memory being 538 * allocated below 0x2000. We leak some memory if we get some 539 * below this mark and allocate again. We should be able to 540 * avoid this with the tag setup, but that does't seem to work. 541 */ 542retry: 543 error = bus_dmamem_alloc(sc->amr_sg_dmat, (void **)&sc->amr_sgtable, BUS_DMA_NOWAIT, &sc->amr_sg_dmamap); 544 if (error) { 545 device_printf(sc->amr_dev, "can't allocate s/g table\n"); 546 return(ENOMEM); 547 } 548 bus_dmamap_load(sc->amr_sg_dmat, sc->amr_sg_dmamap, sc->amr_sgtable, segsize, amr_sglist_map_helper, sc, 0); 549 if (sc->amr_sgbusaddr < 0x2000) { 550 debug(1, "s/g table too low (0x%x), reallocating\n", sc->amr_sgbusaddr); 551 goto retry; 552 } 553 return(0); 554} 555 556/******************************************************************************** 557 * Allocate and set up mailbox areas for the controller (sc) 558 * 559 * The basic mailbox structure should be 16-byte aligned. This means that the 560 * mailbox64 structure has 4 bytes hanging off the bottom. 561 */ 562static void 563amr_setup_mbox_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error) 564{ 565 struct amr_softc *sc = (struct amr_softc *)arg; 566 567 debug_called(1); 568 569 /* save phsyical base of the basic mailbox structure */ 570 sc->amr_mailboxphys = segs->ds_addr + 16; 571} 572 573static int 574amr_setup_mbox(struct amr_softc *sc) 575{ 576 int error; 577 u_int8_t *p; 578 579 debug_called(1); 580 581 /* 582 * Create a single tag describing a region large enough to hold the entire 583 * mailbox. 584 */ 585 error = bus_dma_tag_create(sc->amr_parent_dmat, /* parent */ 586 16, 0, /* alignment, boundary */ 587 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 588 BUS_SPACE_MAXADDR, /* highaddr */ 589 NULL, NULL, /* filter, filterarg */ 590 sizeof(struct amr_mailbox) + 16, 1, /* maxsize, nsegments */ 591 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */ 592 0, /* flags */ 593 busdma_lock_mutex, /* lockfunc */ 594 &Giant, /* lockarg */ 595 &sc->amr_mailbox_dmat); 596 if (error != 0) { 597 device_printf(sc->amr_dev, "can't allocate mailbox tag\n"); 598 return(ENOMEM); 599 } 600 601 /* 602 * Allocate the mailbox structure and permanently map it into 603 * controller-visible space. 604 */ 605 error = bus_dmamem_alloc(sc->amr_mailbox_dmat, (void **)&p, BUS_DMA_NOWAIT, 606 &sc->amr_mailbox_dmamap); 607 if (error) { 608 device_printf(sc->amr_dev, "can't allocate mailbox memory\n"); 609 return(ENOMEM); 610 } 611 bus_dmamap_load(sc->amr_mailbox_dmat, sc->amr_mailbox_dmamap, p, 612 sizeof(struct amr_mailbox64), amr_setup_mbox_helper, sc, 0); 613 /* 614 * Conventional mailbox is inside the mailbox64 region. 615 */ 616 bzero(p, sizeof(struct amr_mailbox64)); 617 sc->amr_mailbox64 = (struct amr_mailbox64 *)(p + 12); 618 sc->amr_mailbox = (struct amr_mailbox *)(p + 16); 619 620 return(0); 621} 622