mmemcard.c revision 1.23
1 /* $NetBSD: mmemcard.c,v 1.23 2014/07/25 08:02:18 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 1.23 2014/07/25 08:02:18 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_flag = D_DISK 214 }; 215 216 CFATTACH_DECL_NEW(mmem, sizeof(struct mmem_softc), 217 mmemmatch, mmemattach, mmemdetach, NULL); 218 219 struct dkdriver mmemdkdriver = { mmemstrategy }; 220 221 static int 222 mmemmatch(device_t parent, cfdata_t cf, void *aux) 223 { 224 struct maple_attach_args *ma = aux; 225 226 return ma->ma_function == MAPLE_FN_MEMCARD ? MAPLE_MATCH_FUNC : 0; 227 } 228 229 static void 230 mmemattach(device_t parent, device_t self, void *aux) 231 { 232 struct mmem_softc *sc = device_private(self); 233 struct maple_attach_args *ma = aux; 234 int i; 235 union { 236 uint32_t v; 237 struct mmem_funcdef s; 238 } funcdef; 239 240 sc->sc_dev = self; 241 sc->sc_parent = parent; 242 sc->sc_unit = ma->ma_unit; 243 sc->sc_devinfo = ma->ma_devinfo; 244 245 funcdef.v = maple_get_function_data(ma->ma_devinfo, MAPLE_FN_MEMCARD); 246 printf(": Memory card\n"); 247 printf("%s: %d part, %d bytes/block, ", 248 device_xname(self), 249 sc->sc_npt = funcdef.s.pt + 1, 250 sc->sc_bsize = (funcdef.s.bb + 1) << 5); 251 if ((sc->sc_wacc = funcdef.s.wa) == 0) 252 printf("no write, "); 253 else 254 printf("%d acc/write, ", sc->sc_wacc); 255 if ((sc->sc_racc = funcdef.s.ra) == 0) 256 printf("no read\n"); 257 else 258 printf("%d acc/read\n", sc->sc_racc); 259 260 /* 261 * start init sequence 262 */ 263 sc->sc_stat = MMEM_INIT; 264 bufq_alloc(&sc->sc_q, "disksort", BUFQ_SORT_RAWBLOCK); 265 266 /* check consistency */ 267 if (sc->sc_wacc != 0) { 268 sc->sc_waccsz = sc->sc_bsize / sc->sc_wacc; 269 if (sc->sc_bsize != sc->sc_waccsz * sc->sc_wacc) { 270 printf("%s: write access isn't equally divided\n", 271 device_xname(self)); 272 sc->sc_wacc = 0; /* no write */ 273 } else if (sc->sc_waccsz > MMEM_MAXACCSIZE) { 274 printf("%s: write access size is too large\n", 275 device_xname(self)); 276 sc->sc_wacc = 0; /* no write */ 277 } 278 } 279 if (sc->sc_racc != 0) { 280 sc->sc_raccsz = sc->sc_bsize / sc->sc_racc; 281 if (sc->sc_bsize != sc->sc_raccsz * sc->sc_racc) { 282 printf("%s: read access isn't equally divided\n", 283 device_xname(self)); 284 sc->sc_racc = 0; /* no read */ 285 } else if (sc->sc_raccsz > MMEM_MAXACCSIZE) { 286 printf("%s: read access size is too large\n", 287 device_xname(self)); 288 sc->sc_racc = 0; /* no read */ 289 } 290 } 291 if (sc->sc_wacc == 0 && sc->sc_racc == 0) { 292 printf("%s: device doesn't support read nor write\n", 293 device_xname(self)); 294 return; 295 } 296 297 /* per-part structure */ 298 sc->sc_pt = malloc(sizeof(struct mmem_pt) * sc->sc_npt, M_DEVBUF, 299 M_WAITOK|M_ZERO); 300 301 for (i = 0; i < sc->sc_npt; i++) { 302 snprintf(sc->sc_pt[i].pt_name, sizeof(sc->sc_pt[i].pt_name), 303 "%s.%d", device_xname(self), i); 304 } 305 306 maple_set_callback(parent, sc->sc_unit, MAPLE_FN_MEMCARD, 307 mmem_intr, sc); 308 309 /* 310 * get capacity (start from partition 0) 311 */ 312 sc->sc_reqm.func_code = htobe32(MAPLE_FUNC(MAPLE_FN_MEMCARD)); 313 sc->sc_reqm.pt = 0; 314 maple_command(sc->sc_parent, sc->sc_unit, MAPLE_FN_MEMCARD, 315 MAPLE_COMMAND_GETMINFO, sizeof sc->sc_reqm / 4, &sc->sc_reqm, 0); 316 } 317 318 static int 319 mmemdetach(device_t self, int flags) 320 { 321 struct mmem_softc *sc = device_private(self); 322 struct buf *bp; 323 int i; 324 int minor_l, minor_h; 325 326 sc->sc_stat = MMEM_DETACH; /* just in case */ 327 328 /* 329 * kill pending I/O 330 */ 331 if ((bp = sc->sc_bp) != NULL) { 332 bp->b_error = EIO; 333 bp->b_resid = bp->b_bcount; 334 biodone(bp); 335 } 336 while ((bp = bufq_get(sc->sc_q)) != NULL) { 337 bp->b_error = EIO; 338 bp->b_resid = bp->b_bcount; 339 biodone(bp); 340 } 341 bufq_free(sc->sc_q); 342 343 /* 344 * revoke vnodes 345 */ 346 #ifdef __HAVE_OLD_DISKLABEL 347 #error This code assumes DISKUNIT() is contiguous in minor number. 348 #endif 349 minor_l = MMEM_DISKMINOR(device_unit(self), 0, 0); 350 minor_h = MMEM_DISKMINOR(device_unit(self), sc->sc_npt - 1, 351 MAXPARTITIONS - 1); 352 vdevgone(bdevsw_lookup_major(&mmem_bdevsw), minor_l, minor_h, VBLK); 353 vdevgone(cdevsw_lookup_major(&mmem_cdevsw), minor_l, minor_h, VCHR); 354 355 /* 356 * free per-partition structure 357 */ 358 if (sc->sc_pt) { 359 /* 360 * detach disks 361 */ 362 for (i = 0; i < sc->sc_npt; i++) { 363 if (sc->sc_pt[i].pt_flags & MMEM_PT_OK) { 364 disk_detach(&sc->sc_pt[i].pt_dk); 365 disk_destroy(&sc->sc_pt[i].pt_dk); 366 } 367 } 368 free(sc->sc_pt, M_DEVBUF); 369 } 370 371 return 0; 372 } 373 374 /* fake disklabel */ 375 static void 376 mmem_defaultlabel(struct mmem_softc *sc, struct mmem_pt *pt, 377 struct disklabel *d) 378 { 379 380 memset(d, 0, sizeof *d); 381 382 #if 0 383 d->d_type = DTYPE_FLOPPY; /* XXX? */ 384 #endif 385 strncpy(d->d_typename, sc->sc_devinfo->di_product_name, 386 sizeof d->d_typename); 387 strcpy(d->d_packname, "fictitious"); 388 d->d_secsize = sc->sc_bsize; 389 d->d_ntracks = 1; /* XXX */ 390 d->d_nsectors = d->d_secpercyl = 8; /* XXX */ 391 d->d_secperunit = pt->pt_info.maxblk - pt->pt_info.minblk + 1; 392 d->d_ncylinders = d->d_secperunit / d->d_secpercyl; 393 d->d_rpm = 1; /* when 4 acc/write */ 394 395 d->d_npartitions = RAW_PART + 1; 396 d->d_partitions[RAW_PART].p_size = d->d_secperunit; 397 398 d->d_magic = d->d_magic2 = DISKMAGIC; 399 d->d_checksum = dkcksum(d); 400 } 401 402 /* 403 * called back from maple bus driver 404 */ 405 static void 406 mmem_intr(void *arg, struct maple_response *response, int sz, int flags) 407 { 408 struct mmem_softc *sc = arg; 409 struct mmem_response_read_data *r = (void *) response->data; 410 struct mmem_response_media_info *rm = (void *) response->data; 411 struct buf *bp; 412 int part; 413 struct mmem_pt *pt; 414 char pbuf[9]; 415 int off; 416 417 switch (sc->sc_stat) { 418 case MMEM_INIT: 419 /* checking part geometry */ 420 part = sc->sc_reqm.pt; 421 pt = &sc->sc_pt[part]; 422 switch ((maple_response_t) response->response_code) { 423 case MAPLE_RESPONSE_DATATRF: 424 pt->pt_info = rm->info; 425 format_bytes(pbuf, sizeof(pbuf), 426 (uint64_t) 427 ((pt->pt_info.maxblk - pt->pt_info.minblk + 1) 428 * sc->sc_bsize)); 429 printf("%s: %s, blk %d %d, inf %d, fat %d %d, dir %d %d, icon %d, data %d\n", 430 pt->pt_name, 431 pbuf, 432 pt->pt_info.maxblk, pt->pt_info.minblk, 433 pt->pt_info.infpos, 434 pt->pt_info.fatpos, pt->pt_info.fatsz, 435 pt->pt_info.dirpos, pt->pt_info.dirsz, 436 pt->pt_info.icon, 437 pt->pt_info.datasz); 438 439 disk_init(&pt->pt_dk, pt->pt_name, &mmemdkdriver); 440 disk_attach(&pt->pt_dk); 441 442 mmem_defaultlabel(sc, pt, pt->pt_dk.dk_label); 443 444 /* this partition is active */ 445 pt->pt_flags = MMEM_PT_OK; 446 447 break; 448 default: 449 printf("%s: init: unexpected response %#x, sz %d\n", 450 pt->pt_name, be32toh(response->response_code), sz); 451 break; 452 } 453 if (++part == sc->sc_npt) { 454 #if 1 455 /* 456 * XXX Read a block and discard the contents (only to 457 * turn off the access indicator on Visual Memory). 458 */ 459 pt = &sc->sc_pt[0]; 460 sc->sc_reqr.func_code = 461 htobe32(MAPLE_FUNC(MAPLE_FN_MEMCARD)); 462 sc->sc_reqr.pt = 0; 463 sc->sc_reqr.block = htobe16(pt->pt_info.minblk); 464 sc->sc_reqr.phase = 0; 465 maple_command(sc->sc_parent, sc->sc_unit, 466 MAPLE_FN_MEMCARD, MAPLE_COMMAND_BREAD, 467 sizeof sc->sc_reqr / 4, &sc->sc_reqr, 0); 468 sc->sc_stat = MMEM_INIT2; 469 #else 470 sc->sc_stat = MMEM_IDLE; /* init done */ 471 #endif 472 } else { 473 sc->sc_reqm.pt = part; 474 maple_command(sc->sc_parent, sc->sc_unit, 475 MAPLE_FN_MEMCARD, MAPLE_COMMAND_GETMINFO, 476 sizeof sc->sc_reqm / 4, &sc->sc_reqm, 0); 477 } 478 break; 479 480 case MMEM_INIT2: 481 /* XXX just discard */ 482 sc->sc_stat = MMEM_IDLE; /* init done */ 483 break; 484 485 case MMEM_READ: 486 bp = sc->sc_bp; 487 488 switch ((maple_response_t) response->response_code) { 489 case MAPLE_RESPONSE_DATATRF: /* read done */ 490 off = sc->sc_raccsz * sc->sc_reqr.phase; 491 memcpy(sc->sc_iobuf + off, r->data + off, 492 sc->sc_raccsz); 493 494 if (++sc->sc_reqr.phase == sc->sc_racc) { 495 /* all phase done */ 496 pt = &sc->sc_pt[sc->sc_reqr.pt]; 497 mmemdone(sc, pt, 0); 498 } else { 499 /* go next phase */ 500 maple_command(sc->sc_parent, sc->sc_unit, 501 MAPLE_FN_MEMCARD, MAPLE_COMMAND_BREAD, 502 sizeof sc->sc_reqr / 4, &sc->sc_reqr, 0); 503 } 504 break; 505 case MAPLE_RESPONSE_FILEERR: 506 mmem_printerror(sc->sc_pt[sc->sc_reqr.pt].pt_name, 507 1, bp->b_rawblkno, 508 r->func_code /* XXX */); 509 mmemstart_bp(sc); /* retry */ 510 break; 511 default: 512 printf("%s: read: unexpected response %#x %#x, sz %d\n", 513 sc->sc_pt[sc->sc_reqr.pt].pt_name, 514 be32toh(response->response_code), 515 be32toh(r->func_code), sz); 516 mmemstart_bp(sc); /* retry */ 517 break; 518 } 519 break; 520 521 case MMEM_WRITE1: /* read before write / verify after write */ 522 bp = sc->sc_bp; 523 524 switch ((maple_response_t) response->response_code) { 525 case MAPLE_RESPONSE_DATATRF: /* read done */ 526 off = sc->sc_raccsz * sc->sc_reqr.phase; 527 if (memcmp(r->data + off, sc->sc_iobuf + off, 528 sc->sc_raccsz)) { 529 /* 530 * data differ, start writing 531 */ 532 mmemstart_write2(sc); 533 } else if (++sc->sc_reqr.phase == sc->sc_racc) { 534 /* 535 * all phase done and compared equal 536 */ 537 pt = &sc->sc_pt[sc->sc_reqr.pt]; 538 mmemdone(sc, pt, 0); 539 } else { 540 /* go next phase */ 541 maple_command(sc->sc_parent, sc->sc_unit, 542 MAPLE_FN_MEMCARD, MAPLE_COMMAND_BREAD, 543 sizeof sc->sc_reqr / 4, &sc->sc_reqr, 0); 544 } 545 break; 546 case MAPLE_RESPONSE_FILEERR: 547 mmem_printerror(sc->sc_pt[sc->sc_reqr.pt].pt_name, 548 1, bp->b_rawblkno, 549 r->func_code /* XXX */); 550 mmemstart_write2(sc); /* start writing */ 551 break; 552 default: 553 printf("%s: verify: unexpected response %#x %#x, sz %d\n", 554 sc->sc_pt[sc->sc_reqr.pt].pt_name, 555 be32toh(response->response_code), 556 be32toh(r->func_code), sz); 557 mmemstart_write2(sc); /* start writing */ 558 break; 559 } 560 break; 561 562 case MMEM_WRITE2: /* write */ 563 bp = sc->sc_bp; 564 565 switch ((maple_response_t) response->response_code) { 566 case MAPLE_RESPONSE_OK: /* write done */ 567 if (sc->sc_reqw.phase == sc->sc_wacc) { 568 /* all phase done */ 569 mmemstart_bp(sc); /* start verify */ 570 } else if (++sc->sc_reqw.phase == sc->sc_wacc) { 571 /* check error */ 572 maple_command(sc->sc_parent, sc->sc_unit, 573 MAPLE_FN_MEMCARD, MAPLE_COMMAND_GETLASTERR, 574 2 /* no data */ , &sc->sc_reqw, 575 MAPLE_FLAG_CMD_PERIODIC_TIMING); 576 } else { 577 /* go next phase */ 578 memcpy(sc->sc_reqw.data, sc->sc_iobuf + 579 sc->sc_waccsz * sc->sc_reqw.phase, 580 sc->sc_waccsz); 581 maple_command(sc->sc_parent, sc->sc_unit, 582 MAPLE_FN_MEMCARD, MAPLE_COMMAND_BWRITE, 583 MMEM_SIZE_REQW(sc) / 4, &sc->sc_reqw, 584 MAPLE_FLAG_CMD_PERIODIC_TIMING); 585 } 586 break; 587 case MAPLE_RESPONSE_FILEERR: 588 mmem_printerror(sc->sc_pt[sc->sc_reqw.pt].pt_name, 589 0, bp->b_rawblkno, 590 r->func_code /* XXX */); 591 mmemstart_write2(sc); /* retry writing */ 592 break; 593 default: 594 printf("%s: write: unexpected response %#x, %#x, sz %d\n", 595 sc->sc_pt[sc->sc_reqw.pt].pt_name, 596 be32toh(response->response_code), 597 be32toh(r->func_code), sz); 598 mmemstart_write2(sc); /* retry writing */ 599 break; 600 } 601 break; 602 603 default: 604 break; 605 } 606 } 607 608 static void 609 mmem_printerror(const char *head, int rd, int blk, uint32_t code) 610 { 611 612 printf("%s: error %sing blk %d:", head, rd? "read" : "writ", blk); 613 NTOHL(code); 614 if (code & 1) 615 printf(" PT error"); 616 if (code & 2) 617 printf(" Phase error"); 618 if (code & 4) 619 printf(" Block error"); 620 if (code & 010) 621 printf(" Write error"); 622 if (code & 020) 623 printf(" Length error"); 624 if (code & 040) 625 printf(" CRC error"); 626 if (code & ~077) 627 printf(" Unknown error %#x", code & ~077); 628 printf("\n"); 629 } 630 631 int 632 mmemopen(dev_t dev, int flags, int devtype, struct lwp *l) 633 { 634 int diskunit, unit, part, labelpart; 635 struct mmem_softc *sc; 636 struct mmem_pt *pt; 637 638 diskunit = DISKUNIT(dev); 639 unit = MMEM_UNIT(diskunit); 640 part = MMEM_PART(diskunit); 641 labelpart = DISKPART(dev); 642 if ((sc = device_lookup_private(&mmem_cd, unit)) == NULL 643 || sc->sc_stat == MMEM_INIT 644 || sc->sc_stat == MMEM_INIT2 645 || part >= sc->sc_npt || (pt = &sc->sc_pt[part])->pt_flags == 0) 646 return ENXIO; 647 648 switch (devtype) { 649 case S_IFCHR: 650 pt->pt_dk.dk_copenmask |= (1 << labelpart); 651 break; 652 case S_IFBLK: 653 pt->pt_dk.dk_bopenmask |= (1 << labelpart); 654 break; 655 } 656 657 return 0; 658 } 659 660 int 661 mmemclose(dev_t dev, int flags, int devtype, struct lwp *l) 662 { 663 int diskunit, unit, part, labelpart; 664 struct mmem_softc *sc; 665 struct mmem_pt *pt; 666 667 diskunit = DISKUNIT(dev); 668 unit = MMEM_UNIT(diskunit); 669 part = MMEM_PART(diskunit); 670 sc = device_lookup_private(&mmem_cd, unit); 671 pt = &sc->sc_pt[part]; 672 labelpart = DISKPART(dev); 673 674 switch (devtype) { 675 case S_IFCHR: 676 pt->pt_dk.dk_copenmask &= ~(1 << labelpart); 677 break; 678 case S_IFBLK: 679 pt->pt_dk.dk_bopenmask &= ~(1 << labelpart); 680 break; 681 } 682 683 return 0; 684 } 685 686 void 687 mmemstrategy(struct buf *bp) 688 { 689 int diskunit, unit, part, labelpart; 690 struct mmem_softc *sc; 691 struct mmem_pt *pt; 692 daddr_t off, nblk, cnt; 693 694 diskunit = DISKUNIT(bp->b_dev); 695 unit = MMEM_UNIT(diskunit); 696 part = MMEM_PART(diskunit); 697 if ((sc = device_lookup_private(&mmem_cd, unit)) == NULL 698 || sc->sc_stat == MMEM_INIT 699 || sc->sc_stat == MMEM_INIT2 700 || part >= sc->sc_npt || (pt = &sc->sc_pt[part])->pt_flags == 0) 701 goto inval; 702 703 #if 0 704 printf("%s: mmemstrategy: blkno %d, count %ld\n", 705 pt->pt_name, bp->b_blkno, bp->b_bcount); 706 #endif 707 708 if (bp->b_flags & B_READ) { 709 if (sc->sc_racc == 0) 710 goto inval; /* no read */ 711 } else if (sc->sc_wacc == 0) { 712 bp->b_error = EROFS; /* no write */ 713 goto done; 714 } 715 716 if (bp->b_blkno & ~(~(daddr_t)0 >> (DEV_BSHIFT + 1 /* sign bit */)) 717 || (bp->b_bcount % sc->sc_bsize) != 0) 718 goto inval; 719 720 cnt = howmany(bp->b_bcount, sc->sc_bsize); 721 if (cnt == 0) 722 goto done; /* no work */ 723 724 off = bp->b_blkno * DEV_BSIZE / sc->sc_bsize; 725 726 /* offset to disklabel partition */ 727 labelpart = DISKPART(bp->b_dev); 728 if (labelpart == RAW_PART) { 729 nblk = pt->pt_info.maxblk - pt->pt_info.minblk + 1; 730 } else { 731 off += 732 nblk = pt->pt_dk.dk_label->d_partitions[labelpart].p_offset; 733 nblk += pt->pt_dk.dk_label->d_partitions[labelpart].p_size; 734 } 735 736 /* deal with the EOF condition */ 737 if (off + cnt > nblk) { 738 if (off >= nblk) { 739 if (off == nblk) 740 goto done; 741 goto inval; 742 } 743 cnt = nblk - off; 744 bp->b_resid = bp->b_bcount - (cnt * sc->sc_bsize); 745 } 746 747 bp->b_rawblkno = off; 748 749 /* queue this transfer */ 750 bufq_put(sc->sc_q, bp); 751 752 if (sc->sc_stat == MMEM_IDLE) 753 mmemstart(sc); 754 755 return; 756 757 inval: bp->b_error = EINVAL; 758 done: bp->b_resid = bp->b_bcount; 759 biodone(bp); 760 } 761 762 /* 763 * start I/O operations 764 */ 765 static void 766 mmemstart(struct mmem_softc *sc) 767 { 768 struct buf *bp; 769 struct mmem_pt *pt; 770 int s; 771 772 if ((bp = bufq_get(sc->sc_q)) == NULL) { 773 sc->sc_stat = MMEM_IDLE; 774 maple_enable_unit_ping(sc->sc_parent, sc->sc_unit, 775 MAPLE_FN_MEMCARD, 1); 776 return; 777 } 778 779 sc->sc_bp = bp; 780 sc->sc_cnt = howmany(bp->b_bcount - bp->b_resid, sc->sc_bsize); 781 KASSERT(sc->sc_cnt); 782 sc->sc_iobuf = bp->b_data; 783 sc->sc_retry = 0; 784 785 pt = &sc->sc_pt[MMEM_PART(DISKUNIT(bp->b_dev))]; 786 s = splbio(); 787 disk_busy(&pt->pt_dk); 788 splx(s); 789 790 /* 791 * I/O access will fail if the removal detection (by maple driver) 792 * occurs before finishing the I/O, so disable it. 793 * We are sending commands, and the removal detection is still alive. 794 */ 795 maple_enable_unit_ping(sc->sc_parent, sc->sc_unit, MAPLE_FN_MEMCARD, 0); 796 797 mmemstart_bp(sc); 798 } 799 800 /* 801 * start/retry a specified I/O operation 802 */ 803 static void 804 mmemstart_bp(struct mmem_softc *sc) 805 { 806 struct buf *bp; 807 int diskunit, part; 808 struct mmem_pt *pt; 809 810 bp = sc->sc_bp; 811 diskunit = DISKUNIT(bp->b_dev); 812 part = MMEM_PART(diskunit); 813 pt = &sc->sc_pt[part]; 814 815 /* handle retry */ 816 if (sc->sc_retry++ > MMEM_MAXRETRY) { 817 /* retry count exceeded */ 818 mmemdone(sc, pt, EIO); 819 return; 820 } 821 822 /* 823 * Start the first phase (phase# = 0). 824 */ 825 /* start read */ 826 sc->sc_stat = (bp->b_flags & B_READ) ? MMEM_READ : MMEM_WRITE1; 827 sc->sc_reqr.func_code = htobe32(MAPLE_FUNC(MAPLE_FN_MEMCARD)); 828 sc->sc_reqr.pt = part; 829 sc->sc_reqr.block = htobe16(bp->b_rawblkno); 830 sc->sc_reqr.phase = 0; /* first phase */ 831 maple_command(sc->sc_parent, sc->sc_unit, MAPLE_FN_MEMCARD, 832 MAPLE_COMMAND_BREAD, sizeof sc->sc_reqr / 4, &sc->sc_reqr, 0); 833 } 834 835 static void 836 mmemstart_write2(struct mmem_softc *sc) 837 { 838 struct buf *bp; 839 int diskunit, part; 840 struct mmem_pt *pt; 841 842 bp = sc->sc_bp; 843 diskunit = DISKUNIT(bp->b_dev); 844 part = MMEM_PART(diskunit); 845 pt = &sc->sc_pt[part]; 846 847 /* handle retry */ 848 if (sc->sc_retry++ > MMEM_MAXRETRY - 2 /* spare for verify read */) { 849 /* retry count exceeded */ 850 mmemdone(sc, pt, EIO); 851 return; 852 } 853 854 /* 855 * Start the first phase (phase# = 0). 856 */ 857 /* start write */ 858 sc->sc_stat = MMEM_WRITE2; 859 sc->sc_reqw.func_code = htobe32(MAPLE_FUNC(MAPLE_FN_MEMCARD)); 860 sc->sc_reqw.pt = part; 861 sc->sc_reqw.block = htobe16(bp->b_rawblkno); 862 sc->sc_reqw.phase = 0; /* first phase */ 863 memcpy(sc->sc_reqw.data, sc->sc_iobuf /* + sc->sc_waccsz * phase */, 864 sc->sc_waccsz); 865 maple_command(sc->sc_parent, sc->sc_unit, MAPLE_FN_MEMCARD, 866 MAPLE_COMMAND_BWRITE, MMEM_SIZE_REQW(sc) / 4, &sc->sc_reqw, 867 MAPLE_FLAG_CMD_PERIODIC_TIMING); 868 } 869 870 static void 871 mmemdone(struct mmem_softc *sc, struct mmem_pt *pt, int err) 872 { 873 struct buf *bp = sc->sc_bp; 874 int s; 875 int bcnt; 876 877 KASSERT(bp); 878 879 if (err) { 880 bcnt = (char *)sc->sc_iobuf - (char *)bp->b_data; 881 bp->b_resid = bp->b_bcount - bcnt; 882 883 /* raise error if no block is read */ 884 if (bcnt == 0) { 885 bp->b_error = err; 886 } 887 goto term_xfer; 888 } 889 890 sc->sc_iobuf += sc->sc_bsize; 891 if (--sc->sc_cnt == 0) { 892 term_xfer: 893 /* terminate current transfer */ 894 sc->sc_bp = NULL; 895 s = splbio(); 896 disk_unbusy(&pt->pt_dk, 897 (char *)sc->sc_iobuf - (char *)bp->b_data, 898 sc->sc_stat == MMEM_READ); 899 biodone(bp); 900 splx(s); 901 902 /* go next transfer */ 903 mmemstart(sc); 904 } else { 905 /* go next block */ 906 bp->b_rawblkno++; 907 sc->sc_retry = 0; 908 mmemstart_bp(sc); 909 } 910 } 911 912 int 913 mmemread(dev_t dev, struct uio *uio, int flags) 914 { 915 916 return physio(mmemstrategy, NULL, dev, B_READ, minphys, uio); 917 } 918 919 int 920 mmemwrite(dev_t dev, struct uio *uio, int flags) 921 { 922 923 return physio(mmemstrategy, NULL, dev, B_WRITE, minphys, uio); 924 } 925 926 int 927 mmemioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 928 { 929 int diskunit, unit, part; 930 struct mmem_softc *sc; 931 struct mmem_pt *pt; 932 933 diskunit = DISKUNIT(dev); 934 unit = MMEM_UNIT(diskunit); 935 part = MMEM_PART(diskunit); 936 sc = device_lookup_private(&mmem_cd, unit); 937 pt = &sc->sc_pt[part]; 938 939 switch (cmd) { 940 case DIOCGDINFO: 941 *(struct disklabel *)data = *pt->pt_dk.dk_label; /* XXX */ 942 break; 943 944 default: 945 /* generic maple ioctl */ 946 return maple_unit_ioctl(sc->sc_parent, sc->sc_unit, cmd, data, 947 flag, l); 948 } 949 950 return 0; 951 } 952
Indexes created Mon Sep 29 03:10:08 GMT 2025