mmemcard.c revision 1.24
1 /* $NetBSD: mmemcard.c,v 1.24 2014/07/25 08:10:32 dholland Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by ITOH Yasufumi. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: mmemcard.c,v 1.24 2014/07/25 08:10:32 dholland Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/buf.h> 37 #include <sys/bufq.h> 38 #include <sys/device.h> 39 #include <sys/disklabel.h> 40 #include <sys/disk.h> 41 #include <sys/kernel.h> 42 #include <sys/malloc.h> 43 #include <sys/proc.h> 44 #include <sys/stat.h> 45 #include <sys/systm.h> 46 #include <sys/vnode.h> 47 #include <sys/conf.h> 48 49 #include <dreamcast/dev/maple/maple.h> 50 #include <dreamcast/dev/maple/mapleconf.h> 51 52 #include "ioconf.h" 53 54 #define MMEM_MAXACCSIZE 1012 /* (255*4) - 8 = 253*32 / 8 */ 55 56 struct mmem_funcdef { /* XXX assuming little-endian structure packing */ 57 unsigned unused : 8, 58 ra : 4, /* number of access / read */ 59 wa : 4, /* number of access / write */ 60 bb : 8, /* block size / 32 - 1 */ 61 pt : 8; /* number of partition - 1 */ 62 }; 63 64 struct mmem_request_read_data { 65 uint32_t func_code; 66 uint8_t pt; 67 uint8_t phase; 68 uint16_t block; 69 }; 70 71 struct mmem_response_read_data { 72 uint32_t func_code; /* function code (big endian) */ 73 uint32_t blkno; /* 512byte block number (big endian) */ 74 uint8_t data[MMEM_MAXACCSIZE]; 75 }; 76 77 struct mmem_request_write_data { 78 uint32_t func_code; 79 uint8_t pt; 80 uint8_t phase; /* 0, 1, 2, 3: for each 128 byte */ 81 uint16_t block; 82 uint8_t data[MMEM_MAXACCSIZE]; 83 }; 84 #define MMEM_SIZE_REQW(sc) ((sc)->sc_waccsz + 8) 85 86 struct mmem_request_get_media_info { 87 uint32_t func_code; 88 uint32_t pt; /* pt (1 byte) and unused 3 bytes */ 89 }; 90 91 struct mmem_media_info { 92 uint16_t maxblk, minblk; 93 uint16_t infpos; 94 uint16_t fatpos, fatsz; 95 uint16_t dirpos, dirsz; 96 uint16_t icon; 97 uint16_t datasz; 98 uint16_t rsvd[3]; 99 }; 100 101 struct mmem_response_media_info { 102 uint32_t func_code; /* function code (big endian) */ 103 struct mmem_media_info info; 104 }; 105 106 struct mmem_softc { 107 device_t sc_dev; 108 109 device_t sc_parent; 110 struct maple_unit *sc_unit; 111 struct maple_devinfo *sc_devinfo; 112 113 enum mmem_stat { 114 MMEM_INIT, /* during initialization */ 115 MMEM_INIT2, /* during initialization */ 116 MMEM_IDLE, /* init done, not in I/O */ 117 MMEM_READ, /* in read operation */ 118 MMEM_WRITE1, /* in write operation (read and compare) */ 119 MMEM_WRITE2, /* in write operation (write) */ 120 MMEM_DETACH /* detaching */ 121 } sc_stat; 122 123 int sc_npt; /* number of partitions */ 124 int sc_bsize; /* block size */ 125 int sc_wacc; /* number of write access per block */ 126 int sc_waccsz; /* size of a write access */ 127 int sc_racc; /* number of read access per block */ 128 int sc_raccsz; /* size of a read access */ 129 130 struct mmem_pt { 131 int pt_flags; 132 #define MMEM_PT_OK 1 /* partition is alive */ 133 struct disk pt_dk; /* disk(9) */ 134 struct mmem_media_info pt_info; /* geometry per part */ 135 136 char pt_name[16 /* see device.h */ + 4 /* ".255" */]; 137 } *sc_pt; 138 139 /* write request buffer (only one is used at a time) */ 140 union { 141 struct mmem_request_read_data req_read; 142 struct mmem_request_write_data req_write; 143 struct mmem_request_get_media_info req_minfo; 144 } sc_req; 145 #define sc_reqr sc_req.req_read 146 #define sc_reqw sc_req.req_write 147 #define sc_reqm sc_req.req_minfo 148 149 /* pending buffers */ 150 struct bufq_state *sc_q; 151 152 /* current I/O access */ 153 struct buf *sc_bp; 154 int sc_cnt; 155 char *sc_iobuf; 156 int sc_retry; 157 #define MMEM_MAXRETRY 12 158 }; 159 160 /* 161 * minor number layout (mmemdetach() depends on this layout): 162 * 163 * 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 164 * |---------------------| |---------------------| |---------| 165 * unit part disklabel partition 166 */ 167 #define MMEM_PART(diskunit) ((diskunit) & 0xff) 168 #define MMEM_UNIT(diskunit) ((diskunit) >> 8) 169 #define MMEM_DISKMINOR(unit, part, disklabel_partition) \ 170 DISKMINOR(((unit) << 8) | (part), (disklabel_partition)) 171 172 static int mmemmatch(device_t, cfdata_t, void *); 173 static void mmemattach(device_t, device_t, void *); 174 static void mmem_defaultlabel(struct mmem_softc *, struct mmem_pt *, 175 struct disklabel *); 176 static int mmemdetach(device_t, int); 177 static void mmem_intr(void *, struct maple_response *, int, int); 178 static void mmem_printerror(const char *, int, int, uint32_t); 179 static void mmemstart(struct mmem_softc *); 180 static void mmemstart_bp(struct mmem_softc *); 181 static void mmemstart_write2(struct mmem_softc *); 182 static void mmemdone(struct mmem_softc *, struct mmem_pt *, int); 183 184 dev_type_open(mmemopen); 185 dev_type_close(mmemclose); 186 dev_type_read(mmemread); 187 dev_type_write(mmemwrite); 188 dev_type_ioctl(mmemioctl); 189 dev_type_strategy(mmemstrategy); 190 191 const struct bdevsw mmem_bdevsw = { 192 .d_open = mmemopen, 193 .d_close = mmemclose, 194 .d_strategy = mmemstrategy, 195 .d_ioctl = mmemioctl, 196 .d_dump = nodump, 197 .d_psize = nosize, 198 .d_discard = nodiscard, 199 .d_flag = D_DISK 200 }; 201 202 const struct cdevsw mmem_cdevsw = { 203 .d_open = mmemopen, 204 .d_close = mmemclose, 205 .d_read = mmemread, 206 .d_write = mmemwrite, 207 .d_ioctl = mmemioctl, 208 .d_stop = nostop, 209 .d_tty = notty, 210 .d_poll = nopoll, 211 .d_mmap = nommap, 212 .d_kqfilter = nokqfilter, 213 .d_discard = nodiscard, 214 .d_flag = D_DISK 215 }; 216 217 CFATTACH_DECL_NEW(mmem, sizeof(struct mmem_softc), 218 mmemmatch, mmemattach, mmemdetach, NULL); 219 220 struct dkdriver mmemdkdriver = { mmemstrategy }; 221 222 static int 223 mmemmatch(device_t parent, cfdata_t cf, void *aux) 224 { 225 struct maple_attach_args *ma = aux; 226 227 return ma->ma_function == MAPLE_FN_MEMCARD ? MAPLE_MATCH_FUNC : 0; 228 } 229 230 static void 231 mmemattach(device_t parent, device_t self, void *aux) 232 { 233 struct mmem_softc *sc = device_private(self); 234 struct maple_attach_args *ma = aux; 235 int i; 236 union { 237 uint32_t v; 238 struct mmem_funcdef s; 239 } funcdef; 240 241 sc->sc_dev = self; 242 sc->sc_parent = parent; 243 sc->sc_unit = ma->ma_unit; 244 sc->sc_devinfo = ma->ma_devinfo; 245 246 funcdef.v = maple_get_function_data(ma->ma_devinfo, MAPLE_FN_MEMCARD); 247 printf(": Memory card\n"); 248 printf("%s: %d part, %d bytes/block, ", 249 device_xname(self), 250 sc->sc_npt = funcdef.s.pt + 1, 251 sc->sc_bsize = (funcdef.s.bb + 1) << 5); 252 if ((sc->sc_wacc = funcdef.s.wa) == 0) 253 printf("no write, "); 254 else 255 printf("%d acc/write, ", sc->sc_wacc); 256 if ((sc->sc_racc = funcdef.s.ra) == 0) 257 printf("no read\n"); 258 else 259 printf("%d acc/read\n", sc->sc_racc); 260 261 /* 262 * start init sequence 263 */ 264 sc->sc_stat = MMEM_INIT; 265 bufq_alloc(&sc->sc_q, "disksort", BUFQ_SORT_RAWBLOCK); 266 267 /* check consistency */ 268 if (sc->sc_wacc != 0) { 269 sc->sc_waccsz = sc->sc_bsize / sc->sc_wacc; 270 if (sc->sc_bsize != sc->sc_waccsz * sc->sc_wacc) { 271 printf("%s: write access isn't equally divided\n", 272 device_xname(self)); 273 sc->sc_wacc = 0; /* no write */ 274 } else if (sc->sc_waccsz > MMEM_MAXACCSIZE) { 275 printf("%s: write access size is too large\n", 276 device_xname(self)); 277 sc->sc_wacc = 0; /* no write */ 278 } 279 } 280 if (sc->sc_racc != 0) { 281 sc->sc_raccsz = sc->sc_bsize / sc->sc_racc; 282 if (sc->sc_bsize != sc->sc_raccsz * sc->sc_racc) { 283 printf("%s: read access isn't equally divided\n", 284 device_xname(self)); 285 sc->sc_racc = 0; /* no read */ 286 } else if (sc->sc_raccsz > MMEM_MAXACCSIZE) { 287 printf("%s: read access size is too large\n", 288 device_xname(self)); 289 sc->sc_racc = 0; /* no read */ 290 } 291 } 292 if (sc->sc_wacc == 0 && sc->sc_racc == 0) { 293 printf("%s: device doesn't support read nor write\n", 294 device_xname(self)); 295 return; 296 } 297 298 /* per-part structure */ 299 sc->sc_pt = malloc(sizeof(struct mmem_pt) * sc->sc_npt, M_DEVBUF, 300 M_WAITOK|M_ZERO); 301 302 for (i = 0; i < sc->sc_npt; i++) { 303 snprintf(sc->sc_pt[i].pt_name, sizeof(sc->sc_pt[i].pt_name), 304 "%s.%d", device_xname(self), i); 305 } 306 307 maple_set_callback(parent, sc->sc_unit, MAPLE_FN_MEMCARD, 308 mmem_intr, sc); 309 310 /* 311 * get capacity (start from partition 0) 312 */ 313 sc->sc_reqm.func_code = htobe32(MAPLE_FUNC(MAPLE_FN_MEMCARD)); 314 sc->sc_reqm.pt = 0; 315 maple_command(sc->sc_parent, sc->sc_unit, MAPLE_FN_MEMCARD, 316 MAPLE_COMMAND_GETMINFO, sizeof sc->sc_reqm / 4, &sc->sc_reqm, 0); 317 } 318 319 static int 320 mmemdetach(device_t self, int flags) 321 { 322 struct mmem_softc *sc = device_private(self); 323 struct buf *bp; 324 int i; 325 int minor_l, minor_h; 326 327 sc->sc_stat = MMEM_DETACH; /* just in case */ 328 329 /* 330 * kill pending I/O 331 */ 332 if ((bp = sc->sc_bp) != NULL) { 333 bp->b_error = EIO; 334 bp->b_resid = bp->b_bcount; 335 biodone(bp); 336 } 337 while ((bp = bufq_get(sc->sc_q)) != NULL) { 338 bp->b_error = EIO; 339 bp->b_resid = bp->b_bcount; 340 biodone(bp); 341 } 342 bufq_free(sc->sc_q); 343 344 /* 345 * revoke vnodes 346 */ 347 #ifdef __HAVE_OLD_DISKLABEL 348 #error This code assumes DISKUNIT() is contiguous in minor number. 349 #endif 350 minor_l = MMEM_DISKMINOR(device_unit(self), 0, 0); 351 minor_h = MMEM_DISKMINOR(device_unit(self), sc->sc_npt - 1, 352 MAXPARTITIONS - 1); 353 vdevgone(bdevsw_lookup_major(&mmem_bdevsw), minor_l, minor_h, VBLK); 354 vdevgone(cdevsw_lookup_major(&mmem_cdevsw), minor_l, minor_h, VCHR); 355 356 /* 357 * free per-partition structure 358 */ 359 if (sc->sc_pt) { 360 /* 361 * detach disks 362 */ 363 for (i = 0; i < sc->sc_npt; i++) { 364 if (sc->sc_pt[i].pt_flags & MMEM_PT_OK) { 365 disk_detach(&sc->sc_pt[i].pt_dk); 366 disk_destroy(&sc->sc_pt[i].pt_dk); 367 } 368 } 369 free(sc->sc_pt, M_DEVBUF); 370 } 371 372 return 0; 373 } 374 375 /* fake disklabel */ 376 static void 377 mmem_defaultlabel(struct mmem_softc *sc, struct mmem_pt *pt, 378 struct disklabel *d) 379 { 380 381 memset(d, 0, sizeof *d); 382 383 #if 0 384 d->d_type = DTYPE_FLOPPY; /* XXX? */ 385 #endif 386 strncpy(d->d_typename, sc->sc_devinfo->di_product_name, 387 sizeof d->d_typename); 388 strcpy(d->d_packname, "fictitious"); 389 d->d_secsize = sc->sc_bsize; 390 d->d_ntracks = 1; /* XXX */ 391 d->d_nsectors = d->d_secpercyl = 8; /* XXX */ 392 d->d_secperunit = pt->pt_info.maxblk - pt->pt_info.minblk + 1; 393 d->d_ncylinders = d->d_secperunit / d->d_secpercyl; 394 d->d_rpm = 1; /* when 4 acc/write */ 395 396 d->d_npartitions = RAW_PART + 1; 397 d->d_partitions[RAW_PART].p_size = d->d_secperunit; 398 399 d->d_magic = d->d_magic2 = DISKMAGIC; 400 d->d_checksum = dkcksum(d); 401 } 402 403 /* 404 * called back from maple bus driver 405 */ 406 static void 407 mmem_intr(void *arg, struct maple_response *response, int sz, int flags) 408 { 409 struct mmem_softc *sc = arg; 410 struct mmem_response_read_data *r = (void *) response->data; 411 struct mmem_response_media_info *rm = (void *) response->data; 412 struct buf *bp; 413 int part; 414 struct mmem_pt *pt; 415 char pbuf[9]; 416 int off; 417 418 switch (sc->sc_stat) { 419 case MMEM_INIT: 420 /* checking part geometry */ 421 part = sc->sc_reqm.pt; 422 pt = &sc->sc_pt[part]; 423 switch ((maple_response_t) response->response_code) { 424 case MAPLE_RESPONSE_DATATRF: 425 pt->pt_info = rm->info; 426 format_bytes(pbuf, sizeof(pbuf), 427 (uint64_t) 428 ((pt->pt_info.maxblk - pt->pt_info.minblk + 1) 429 * sc->sc_bsize)); 430 printf("%s: %s, blk %d %d, inf %d, fat %d %d, dir %d %d, icon %d, data %d\n", 431 pt->pt_name, 432 pbuf, 433 pt->pt_info.maxblk, pt->pt_info.minblk, 434 pt->pt_info.infpos, 435 pt->pt_info.fatpos, pt->pt_info.fatsz, 436 pt->pt_info.dirpos, pt->pt_info.dirsz, 437 pt->pt_info.icon, 438 pt->pt_info.datasz); 439 440 disk_init(&pt->pt_dk, pt->pt_name, &mmemdkdriver); 441 disk_attach(&pt->pt_dk); 442 443 mmem_defaultlabel(sc, pt, pt->pt_dk.dk_label); 444 445 /* this partition is active */ 446 pt->pt_flags = MMEM_PT_OK; 447 448 break; 449 default: 450 printf("%s: init: unexpected response %#x, sz %d\n", 451 pt->pt_name, be32toh(response->response_code), sz); 452 break; 453 } 454 if (++part == sc->sc_npt) { 455 #if 1 456 /* 457 * XXX Read a block and discard the contents (only to 458 * turn off the access indicator on Visual Memory). 459 */ 460 pt = &sc->sc_pt[0]; 461 sc->sc_reqr.func_code = 462 htobe32(MAPLE_FUNC(MAPLE_FN_MEMCARD)); 463 sc->sc_reqr.pt = 0; 464 sc->sc_reqr.block = htobe16(pt->pt_info.minblk); 465 sc->sc_reqr.phase = 0; 466 maple_command(sc->sc_parent, sc->sc_unit, 467 MAPLE_FN_MEMCARD, MAPLE_COMMAND_BREAD, 468 sizeof sc->sc_reqr / 4, &sc->sc_reqr, 0); 469 sc->sc_stat = MMEM_INIT2; 470 #else 471 sc->sc_stat = MMEM_IDLE; /* init done */ 472 #endif 473 } else { 474 sc->sc_reqm.pt = part; 475 maple_command(sc->sc_parent, sc->sc_unit, 476 MAPLE_FN_MEMCARD, MAPLE_COMMAND_GETMINFO, 477 sizeof sc->sc_reqm / 4, &sc->sc_reqm, 0); 478 } 479 break; 480 481 case MMEM_INIT2: 482 /* XXX just discard */ 483 sc->sc_stat = MMEM_IDLE; /* init done */ 484 break; 485 486 case MMEM_READ: 487 bp = sc->sc_bp; 488 489 switch ((maple_response_t) response->response_code) { 490 case MAPLE_RESPONSE_DATATRF: /* read done */ 491 off = sc->sc_raccsz * sc->sc_reqr.phase; 492 memcpy(sc->sc_iobuf + off, r->data + off, 493 sc->sc_raccsz); 494 495 if (++sc->sc_reqr.phase == sc->sc_racc) { 496 /* all phase done */ 497 pt = &sc->sc_pt[sc->sc_reqr.pt]; 498 mmemdone(sc, pt, 0); 499 } else { 500 /* go next phase */ 501 maple_command(sc->sc_parent, sc->sc_unit, 502 MAPLE_FN_MEMCARD, MAPLE_COMMAND_BREAD, 503 sizeof sc->sc_reqr / 4, &sc->sc_reqr, 0); 504 } 505 break; 506 case MAPLE_RESPONSE_FILEERR: 507 mmem_printerror(sc->sc_pt[sc->sc_reqr.pt].pt_name, 508 1, bp->b_rawblkno, 509 r->func_code /* XXX */); 510 mmemstart_bp(sc); /* retry */ 511 break; 512 default: 513 printf("%s: read: unexpected response %#x %#x, sz %d\n", 514 sc->sc_pt[sc->sc_reqr.pt].pt_name, 515 be32toh(response->response_code), 516 be32toh(r->func_code), sz); 517 mmemstart_bp(sc); /* retry */ 518 break; 519 } 520 break; 521 522 case MMEM_WRITE1: /* read before write / verify after write */ 523 bp = sc->sc_bp; 524 525 switch ((maple_response_t) response->response_code) { 526 case MAPLE_RESPONSE_DATATRF: /* read done */ 527 off = sc->sc_raccsz * sc->sc_reqr.phase; 528 if (memcmp(r->data + off, sc->sc_iobuf + off, 529 sc->sc_raccsz)) { 530 /* 531 * data differ, start writing 532 */ 533 mmemstart_write2(sc); 534 } else if (++sc->sc_reqr.phase == sc->sc_racc) { 535 /* 536 * all phase done and compared equal 537 */ 538 pt = &sc->sc_pt[sc->sc_reqr.pt]; 539 mmemdone(sc, pt, 0); 540 } else { 541 /* go next phase */ 542 maple_command(sc->sc_parent, sc->sc_unit, 543 MAPLE_FN_MEMCARD, MAPLE_COMMAND_BREAD, 544 sizeof sc->sc_reqr / 4, &sc->sc_reqr, 0); 545 } 546 break; 547 case MAPLE_RESPONSE_FILEERR: 548 mmem_printerror(sc->sc_pt[sc->sc_reqr.pt].pt_name, 549 1, bp->b_rawblkno, 550 r->func_code /* XXX */); 551 mmemstart_write2(sc); /* start writing */ 552 break; 553 default: 554 printf("%s: verify: unexpected response %#x %#x, sz %d\n", 555 sc->sc_pt[sc->sc_reqr.pt].pt_name, 556 be32toh(response->response_code), 557 be32toh(r->func_code), sz); 558 mmemstart_write2(sc); /* start writing */ 559 break; 560 } 561 break; 562 563 case MMEM_WRITE2: /* write */ 564 bp = sc->sc_bp; 565 566 switch ((maple_response_t) response->response_code) { 567 case MAPLE_RESPONSE_OK: /* write done */ 568 if (sc->sc_reqw.phase == sc->sc_wacc) { 569 /* all phase done */ 570 mmemstart_bp(sc); /* start verify */ 571 } else if (++sc->sc_reqw.phase == sc->sc_wacc) { 572 /* check error */ 573 maple_command(sc->sc_parent, sc->sc_unit, 574 MAPLE_FN_MEMCARD, MAPLE_COMMAND_GETLASTERR, 575 2 /* no data */ , &sc->sc_reqw, 576 MAPLE_FLAG_CMD_PERIODIC_TIMING); 577 } else { 578 /* go next phase */ 579 memcpy(sc->sc_reqw.data, sc->sc_iobuf + 580 sc->sc_waccsz * sc->sc_reqw.phase, 581 sc->sc_waccsz); 582 maple_command(sc->sc_parent, sc->sc_unit, 583 MAPLE_FN_MEMCARD, MAPLE_COMMAND_BWRITE, 584 MMEM_SIZE_REQW(sc) / 4, &sc->sc_reqw, 585 MAPLE_FLAG_CMD_PERIODIC_TIMING); 586 } 587 break; 588 case MAPLE_RESPONSE_FILEERR: 589 mmem_printerror(sc->sc_pt[sc->sc_reqw.pt].pt_name, 590 0, bp->b_rawblkno, 591 r->func_code /* XXX */); 592 mmemstart_write2(sc); /* retry writing */ 593 break; 594 default: 595 printf("%s: write: unexpected response %#x, %#x, sz %d\n", 596 sc->sc_pt[sc->sc_reqw.pt].pt_name, 597 be32toh(response->response_code), 598 be32toh(r->func_code), sz); 599 mmemstart_write2(sc); /* retry writing */ 600 break; 601 } 602 break; 603 604 default: 605 break; 606 } 607 } 608 609 static void 610 mmem_printerror(const char *head, int rd, int blk, uint32_t code) 611 { 612 613 printf("%s: error %sing blk %d:", head, rd? "read" : "writ", blk); 614 NTOHL(code); 615 if (code & 1) 616 printf(" PT error"); 617 if (code & 2) 618 printf(" Phase error"); 619 if (code & 4) 620 printf(" Block error"); 621 if (code & 010) 622 printf(" Write error"); 623 if (code & 020) 624 printf(" Length error"); 625 if (code & 040) 626 printf(" CRC error"); 627 if (code & ~077) 628 printf(" Unknown error %#x", code & ~077); 629 printf("\n"); 630 } 631 632 int 633 mmemopen(dev_t dev, int flags, int devtype, struct lwp *l) 634 { 635 int diskunit, unit, part, labelpart; 636 struct mmem_softc *sc; 637 struct mmem_pt *pt; 638 639 diskunit = DISKUNIT(dev); 640 unit = MMEM_UNIT(diskunit); 641 part = MMEM_PART(diskunit); 642 labelpart = DISKPART(dev); 643 if ((sc = device_lookup_private(&mmem_cd, unit)) == NULL 644 || sc->sc_stat == MMEM_INIT 645 || sc->sc_stat == MMEM_INIT2 646 || part >= sc->sc_npt || (pt = &sc->sc_pt[part])->pt_flags == 0) 647 return ENXIO; 648 649 switch (devtype) { 650 case S_IFCHR: 651 pt->pt_dk.dk_copenmask |= (1 << labelpart); 652 break; 653 case S_IFBLK: 654 pt->pt_dk.dk_bopenmask |= (1 << labelpart); 655 break; 656 } 657 658 return 0; 659 } 660 661 int 662 mmemclose(dev_t dev, int flags, int devtype, struct lwp *l) 663 { 664 int diskunit, unit, part, labelpart; 665 struct mmem_softc *sc; 666 struct mmem_pt *pt; 667 668 diskunit = DISKUNIT(dev); 669 unit = MMEM_UNIT(diskunit); 670 part = MMEM_PART(diskunit); 671 sc = device_lookup_private(&mmem_cd, unit); 672 pt = &sc->sc_pt[part]; 673 labelpart = DISKPART(dev); 674 675 switch (devtype) { 676 case S_IFCHR: 677 pt->pt_dk.dk_copenmask &= ~(1 << labelpart); 678 break; 679 case S_IFBLK: 680 pt->pt_dk.dk_bopenmask &= ~(1 << labelpart); 681 break; 682 } 683 684 return 0; 685 } 686 687 void 688 mmemstrategy(struct buf *bp) 689 { 690 int diskunit, unit, part, labelpart; 691 struct mmem_softc *sc; 692 struct mmem_pt *pt; 693 daddr_t off, nblk, cnt; 694 695 diskunit = DISKUNIT(bp->b_dev); 696 unit = MMEM_UNIT(diskunit); 697 part = MMEM_PART(diskunit); 698 if ((sc = device_lookup_private(&mmem_cd, unit)) == NULL 699 || sc->sc_stat == MMEM_INIT 700 || sc->sc_stat == MMEM_INIT2 701 || part >= sc->sc_npt || (pt = &sc->sc_pt[part])->pt_flags == 0) 702 goto inval; 703 704 #if 0 705 printf("%s: mmemstrategy: blkno %d, count %ld\n", 706 pt->pt_name, bp->b_blkno, bp->b_bcount); 707 #endif 708 709 if (bp->b_flags & B_READ) { 710 if (sc->sc_racc == 0) 711 goto inval; /* no read */ 712 } else if (sc->sc_wacc == 0) { 713 bp->b_error = EROFS; /* no write */ 714 goto done; 715 } 716 717 if (bp->b_blkno & ~(~(daddr_t)0 >> (DEV_BSHIFT + 1 /* sign bit */)) 718 || (bp->b_bcount % sc->sc_bsize) != 0) 719 goto inval; 720 721 cnt = howmany(bp->b_bcount, sc->sc_bsize); 722 if (cnt == 0) 723 goto done; /* no work */ 724 725 off = bp->b_blkno * DEV_BSIZE / sc->sc_bsize; 726 727 /* offset to disklabel partition */ 728 labelpart = DISKPART(bp->b_dev); 729 if (labelpart == RAW_PART) { 730 nblk = pt->pt_info.maxblk - pt->pt_info.minblk + 1; 731 } else { 732 off += 733 nblk = pt->pt_dk.dk_label->d_partitions[labelpart].p_offset; 734 nblk += pt->pt_dk.dk_label->d_partitions[labelpart].p_size; 735 } 736 737 /* deal with the EOF condition */ 738 if (off + cnt > nblk) { 739 if (off >= nblk) { 740 if (off == nblk) 741 goto done; 742 goto inval; 743 } 744 cnt = nblk - off; 745 bp->b_resid = bp->b_bcount - (cnt * sc->sc_bsize); 746 } 747 748 bp->b_rawblkno = off; 749 750 /* queue this transfer */ 751 bufq_put(sc->sc_q, bp); 752 753 if (sc->sc_stat == MMEM_IDLE) 754 mmemstart(sc); 755 756 return; 757 758 inval: bp->b_error = EINVAL; 759 done: bp->b_resid = bp->b_bcount; 760 biodone(bp); 761 } 762 763 /* 764 * start I/O operations 765 */ 766 static void 767 mmemstart(struct mmem_softc *sc) 768 { 769 struct buf *bp; 770 struct mmem_pt *pt; 771 int s; 772 773 if ((bp = bufq_get(sc->sc_q)) == NULL) { 774 sc->sc_stat = MMEM_IDLE; 775 maple_enable_unit_ping(sc->sc_parent, sc->sc_unit, 776 MAPLE_FN_MEMCARD, 1); 777 return; 778 } 779 780 sc->sc_bp = bp; 781 sc->sc_cnt = howmany(bp->b_bcount - bp->b_resid, sc->sc_bsize); 782 KASSERT(sc->sc_cnt); 783 sc->sc_iobuf = bp->b_data; 784 sc->sc_retry = 0; 785 786 pt = &sc->sc_pt[MMEM_PART(DISKUNIT(bp->b_dev))]; 787 s = splbio(); 788 disk_busy(&pt->pt_dk); 789 splx(s); 790 791 /* 792 * I/O access will fail if the removal detection (by maple driver) 793 * occurs before finishing the I/O, so disable it. 794 * We are sending commands, and the removal detection is still alive. 795 */ 796 maple_enable_unit_ping(sc->sc_parent, sc->sc_unit, MAPLE_FN_MEMCARD, 0); 797 798 mmemstart_bp(sc); 799 } 800 801 /* 802 * start/retry a specified I/O operation 803 */ 804 static void 805 mmemstart_bp(struct mmem_softc *sc) 806 { 807 struct buf *bp; 808 int diskunit, part; 809 struct mmem_pt *pt; 810 811 bp = sc->sc_bp; 812 diskunit = DISKUNIT(bp->b_dev); 813 part = MMEM_PART(diskunit); 814 pt = &sc->sc_pt[part]; 815 816 /* handle retry */ 817 if (sc->sc_retry++ > MMEM_MAXRETRY) { 818 /* retry count exceeded */ 819 mmemdone(sc, pt, EIO); 820 return; 821 } 822 823 /* 824 * Start the first phase (phase# = 0). 825 */ 826 /* start read */ 827 sc->sc_stat = (bp->b_flags & B_READ) ? MMEM_READ : MMEM_WRITE1; 828 sc->sc_reqr.func_code = htobe32(MAPLE_FUNC(MAPLE_FN_MEMCARD)); 829 sc->sc_reqr.pt = part; 830 sc->sc_reqr.block = htobe16(bp->b_rawblkno); 831 sc->sc_reqr.phase = 0; /* first phase */ 832 maple_command(sc->sc_parent, sc->sc_unit, MAPLE_FN_MEMCARD, 833 MAPLE_COMMAND_BREAD, sizeof sc->sc_reqr / 4, &sc->sc_reqr, 0); 834 } 835 836 static void 837 mmemstart_write2(struct mmem_softc *sc) 838 { 839 struct buf *bp; 840 int diskunit, part; 841 struct mmem_pt *pt; 842 843 bp = sc->sc_bp; 844 diskunit = DISKUNIT(bp->b_dev); 845 part = MMEM_PART(diskunit); 846 pt = &sc->sc_pt[part]; 847 848 /* handle retry */ 849 if (sc->sc_retry++ > MMEM_MAXRETRY - 2 /* spare for verify read */) { 850 /* retry count exceeded */ 851 mmemdone(sc, pt, EIO); 852 return; 853 } 854 855 /* 856 * Start the first phase (phase# = 0). 857 */ 858 /* start write */ 859 sc->sc_stat = MMEM_WRITE2; 860 sc->sc_reqw.func_code = htobe32(MAPLE_FUNC(MAPLE_FN_MEMCARD)); 861 sc->sc_reqw.pt = part; 862 sc->sc_reqw.block = htobe16(bp->b_rawblkno); 863 sc->sc_reqw.phase = 0; /* first phase */ 864 memcpy(sc->sc_reqw.data, sc->sc_iobuf /* + sc->sc_waccsz * phase */, 865 sc->sc_waccsz); 866 maple_command(sc->sc_parent, sc->sc_unit, MAPLE_FN_MEMCARD, 867 MAPLE_COMMAND_BWRITE, MMEM_SIZE_REQW(sc) / 4, &sc->sc_reqw, 868 MAPLE_FLAG_CMD_PERIODIC_TIMING); 869 } 870 871 static void 872 mmemdone(struct mmem_softc *sc, struct mmem_pt *pt, int err) 873 { 874 struct buf *bp = sc->sc_bp; 875 int s; 876 int bcnt; 877 878 KASSERT(bp); 879 880 if (err) { 881 bcnt = (char *)sc->sc_iobuf - (char *)bp->b_data; 882 bp->b_resid = bp->b_bcount - bcnt; 883 884 /* raise error if no block is read */ 885 if (bcnt == 0) { 886 bp->b_error = err; 887 } 888 goto term_xfer; 889 } 890 891 sc->sc_iobuf += sc->sc_bsize; 892 if (--sc->sc_cnt == 0) { 893 term_xfer: 894 /* terminate current transfer */ 895 sc->sc_bp = NULL; 896 s = splbio(); 897 disk_unbusy(&pt->pt_dk, 898 (char *)sc->sc_iobuf - (char *)bp->b_data, 899 sc->sc_stat == MMEM_READ); 900 biodone(bp); 901 splx(s); 902 903 /* go next transfer */ 904 mmemstart(sc); 905 } else { 906 /* go next block */ 907 bp->b_rawblkno++; 908 sc->sc_retry = 0; 909 mmemstart_bp(sc); 910 } 911 } 912 913 int 914 mmemread(dev_t dev, struct uio *uio, int flags) 915 { 916 917 return physio(mmemstrategy, NULL, dev, B_READ, minphys, uio); 918 } 919 920 int 921 mmemwrite(dev_t dev, struct uio *uio, int flags) 922 { 923 924 return physio(mmemstrategy, NULL, dev, B_WRITE, minphys, uio); 925 } 926 927 int 928 mmemioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 929 { 930 int diskunit, unit, part; 931 struct mmem_softc *sc; 932 struct mmem_pt *pt; 933 934 diskunit = DISKUNIT(dev); 935 unit = MMEM_UNIT(diskunit); 936 part = MMEM_PART(diskunit); 937 sc = device_lookup_private(&mmem_cd, unit); 938 pt = &sc->sc_pt[part]; 939 940 switch (cmd) { 941 case DIOCGDINFO: 942 *(struct disklabel *)data = *pt->pt_dk.dk_label; /* XXX */ 943 break; 944 945 default: 946 /* generic maple ioctl */ 947 return maple_unit_ioctl(sc->sc_parent, sc->sc_unit, cmd, data, 948 flag, l); 949 } 950 951 return 0; 952 } 953
Indexes created Mon Sep 29 21:09:56 GMT 2025