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-rw-r--r--drivers/mtd/mtdpart.c324
1 files changed, 166 insertions, 158 deletions
diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index 56a760a736a9..45c6f32b0bf1 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -313,6 +313,170 @@ int del_mtd_partitions(struct mtd_info *master)
313 return 0; 313 return 0;
314} 314}
315 315
316static struct mtd_part *add_one_partition(struct mtd_info *master,
317 const struct mtd_partition *part, int partno,
318 u_int32_t cur_offset)
319{
320 struct mtd_part *slave;
321
322 /* allocate the partition structure */
323 slave = kzalloc (sizeof(*slave), GFP_KERNEL);
324 if (!slave) {
325 printk("memory allocation error while creating partitions for \"%s\"\n",
326 master->name);
327 del_mtd_partitions(master);
328 return NULL;
329 }
330 list_add(&slave->list, &mtd_partitions);
331
332 /* set up the MTD object for this partition */
333 slave->mtd.type = master->type;
334 slave->mtd.flags = master->flags & ~part->mask_flags;
335 slave->mtd.size = part->size;
336 slave->mtd.writesize = master->writesize;
337 slave->mtd.oobsize = master->oobsize;
338 slave->mtd.oobavail = master->oobavail;
339 slave->mtd.subpage_sft = master->subpage_sft;
340
341 slave->mtd.name = part->name;
342 slave->mtd.owner = master->owner;
343
344 slave->mtd.read = part_read;
345 slave->mtd.write = part_write;
346
347 if (master->panic_write)
348 slave->mtd.panic_write = part_panic_write;
349
350 if(master->point && master->unpoint){
351 slave->mtd.point = part_point;
352 slave->mtd.unpoint = part_unpoint;
353 }
354
355 if (master->read_oob)
356 slave->mtd.read_oob = part_read_oob;
357 if (master->write_oob)
358 slave->mtd.write_oob = part_write_oob;
359 if(master->read_user_prot_reg)
360 slave->mtd.read_user_prot_reg = part_read_user_prot_reg;
361 if(master->read_fact_prot_reg)
362 slave->mtd.read_fact_prot_reg = part_read_fact_prot_reg;
363 if(master->write_user_prot_reg)
364 slave->mtd.write_user_prot_reg = part_write_user_prot_reg;
365 if(master->lock_user_prot_reg)
366 slave->mtd.lock_user_prot_reg = part_lock_user_prot_reg;
367 if(master->get_user_prot_info)
368 slave->mtd.get_user_prot_info = part_get_user_prot_info;
369 if(master->get_fact_prot_info)
370 slave->mtd.get_fact_prot_info = part_get_fact_prot_info;
371 if (master->sync)
372 slave->mtd.sync = part_sync;
373 if (!partno && master->suspend && master->resume) {
374 slave->mtd.suspend = part_suspend;
375 slave->mtd.resume = part_resume;
376 }
377 if (master->writev)
378 slave->mtd.writev = part_writev;
379 if (master->lock)
380 slave->mtd.lock = part_lock;
381 if (master->unlock)
382 slave->mtd.unlock = part_unlock;
383 if (master->block_isbad)
384 slave->mtd.block_isbad = part_block_isbad;
385 if (master->block_markbad)
386 slave->mtd.block_markbad = part_block_markbad;
387 slave->mtd.erase = part_erase;
388 slave->master = master;
389 slave->offset = part->offset;
390 slave->index = partno;
391
392 if (slave->offset == MTDPART_OFS_APPEND)
393 slave->offset = cur_offset;
394 if (slave->offset == MTDPART_OFS_NXTBLK) {
395 slave->offset = cur_offset;
396 if ((cur_offset % master->erasesize) != 0) {
397 /* Round up to next erasesize */
398 slave->offset = ((cur_offset / master->erasesize) + 1) * master->erasesize;
399 printk(KERN_NOTICE "Moving partition %d: "
400 "0x%08x -> 0x%08x\n", partno,
401 cur_offset, slave->offset);
402 }
403 }
404 if (slave->mtd.size == MTDPART_SIZ_FULL)
405 slave->mtd.size = master->size - slave->offset;
406
407 printk (KERN_NOTICE "0x%08x-0x%08x : \"%s\"\n", slave->offset,
408 slave->offset + slave->mtd.size, slave->mtd.name);
409
410 /* let's do some sanity checks */
411 if (slave->offset >= master->size) {
412 /* let's register it anyway to preserve ordering */
413 slave->offset = 0;
414 slave->mtd.size = 0;
415 printk ("mtd: partition \"%s\" is out of reach -- disabled\n",
416 part->name);
417 }
418 if (slave->offset + slave->mtd.size > master->size) {
419 slave->mtd.size = master->size - slave->offset;
420 printk ("mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#x\n",
421 part->name, master->name, slave->mtd.size);
422 }
423 if (master->numeraseregions>1) {
424 /* Deal with variable erase size stuff */
425 int i;
426 struct mtd_erase_region_info *regions = master->eraseregions;
427
428 /* Find the first erase regions which is part of this partition. */
429 for (i=0; i < master->numeraseregions && regions[i].offset <= slave->offset; i++)
430 ;
431
432 for (i--; i < master->numeraseregions && regions[i].offset < slave->offset + slave->mtd.size; i++) {
433 if (slave->mtd.erasesize < regions[i].erasesize) {
434 slave->mtd.erasesize = regions[i].erasesize;
435 }
436 }
437 } else {
438 /* Single erase size */
439 slave->mtd.erasesize = master->erasesize;
440 }
441
442 if ((slave->mtd.flags & MTD_WRITEABLE) &&
443 (slave->offset % slave->mtd.erasesize)) {
444 /* Doesn't start on a boundary of major erase size */
445 /* FIXME: Let it be writable if it is on a boundary of _minor_ erase size though */
446 slave->mtd.flags &= ~MTD_WRITEABLE;
447 printk ("mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n",
448 part->name);
449 }
450 if ((slave->mtd.flags & MTD_WRITEABLE) &&
451 (slave->mtd.size % slave->mtd.erasesize)) {
452 slave->mtd.flags &= ~MTD_WRITEABLE;
453 printk ("mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
454 part->name);
455 }
456
457 slave->mtd.ecclayout = master->ecclayout;
458 if (master->block_isbad) {
459 uint32_t offs = 0;
460
461 while(offs < slave->mtd.size) {
462 if (master->block_isbad(master,
463 offs + slave->offset))
464 slave->mtd.ecc_stats.badblocks++;
465 offs += slave->mtd.erasesize;
466 }
467 }
468
469 if(part->mtdp) { /* store the object pointer (caller may or may not register it */
470 *part->mtdp = &slave->mtd;
471 slave->registered = 0;
472 } else {
473 /* register our partition */
474 add_mtd_device(&slave->mtd);
475 slave->registered = 1;
476 }
477 return slave;
478}
479
316/* 480/*
317 * This function, given a master MTD object and a partition table, creates 481 * This function, given a master MTD object and a partition table, creates
318 * and registers slave MTD objects which are bound to the master according to 482 * and registers slave MTD objects which are bound to the master according to
@@ -331,166 +495,10 @@ int add_mtd_partitions(struct mtd_info *master,
331 printk (KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name); 495 printk (KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name);
332 496
333 for (i = 0; i < nbparts; i++) { 497 for (i = 0; i < nbparts; i++) {
334 498 slave = add_one_partition(master, parts + i, i, cur_offset);
335 /* allocate the partition structure */ 499 if (!slave)
336 slave = kzalloc (sizeof(*slave), GFP_KERNEL);
337 if (!slave) {
338 printk ("memory allocation error while creating partitions for \"%s\"\n",
339 master->name);
340 del_mtd_partitions(master);
341 return -ENOMEM; 500 return -ENOMEM;
342 }
343 list_add(&slave->list, &mtd_partitions);
344
345 /* set up the MTD object for this partition */
346 slave->mtd.type = master->type;
347 slave->mtd.flags = master->flags & ~parts[i].mask_flags;
348 slave->mtd.size = parts[i].size;
349 slave->mtd.writesize = master->writesize;
350 slave->mtd.oobsize = master->oobsize;
351 slave->mtd.oobavail = master->oobavail;
352 slave->mtd.subpage_sft = master->subpage_sft;
353
354 slave->mtd.name = parts[i].name;
355 slave->mtd.owner = master->owner;
356
357 slave->mtd.read = part_read;
358 slave->mtd.write = part_write;
359
360 if (master->panic_write)
361 slave->mtd.panic_write = part_panic_write;
362
363 if(master->point && master->unpoint){
364 slave->mtd.point = part_point;
365 slave->mtd.unpoint = part_unpoint;
366 }
367
368 if (master->read_oob)
369 slave->mtd.read_oob = part_read_oob;
370 if (master->write_oob)
371 slave->mtd.write_oob = part_write_oob;
372 if(master->read_user_prot_reg)
373 slave->mtd.read_user_prot_reg = part_read_user_prot_reg;
374 if(master->read_fact_prot_reg)
375 slave->mtd.read_fact_prot_reg = part_read_fact_prot_reg;
376 if(master->write_user_prot_reg)
377 slave->mtd.write_user_prot_reg = part_write_user_prot_reg;
378 if(master->lock_user_prot_reg)
379 slave->mtd.lock_user_prot_reg = part_lock_user_prot_reg;
380 if(master->get_user_prot_info)
381 slave->mtd.get_user_prot_info = part_get_user_prot_info;
382 if(master->get_fact_prot_info)
383 slave->mtd.get_fact_prot_info = part_get_fact_prot_info;
384 if (master->sync)
385 slave->mtd.sync = part_sync;
386 if (!i && master->suspend && master->resume) {
387 slave->mtd.suspend = part_suspend;
388 slave->mtd.resume = part_resume;
389 }
390 if (master->writev)
391 slave->mtd.writev = part_writev;
392 if (master->lock)
393 slave->mtd.lock = part_lock;
394 if (master->unlock)
395 slave->mtd.unlock = part_unlock;
396 if (master->block_isbad)
397 slave->mtd.block_isbad = part_block_isbad;
398 if (master->block_markbad)
399 slave->mtd.block_markbad = part_block_markbad;
400 slave->mtd.erase = part_erase;
401 slave->master = master;
402 slave->offset = parts[i].offset;
403 slave->index = i;
404
405 if (slave->offset == MTDPART_OFS_APPEND)
406 slave->offset = cur_offset;
407 if (slave->offset == MTDPART_OFS_NXTBLK) {
408 slave->offset = cur_offset;
409 if ((cur_offset % master->erasesize) != 0) {
410 /* Round up to next erasesize */
411 slave->offset = ((cur_offset / master->erasesize) + 1) * master->erasesize;
412 printk(KERN_NOTICE "Moving partition %d: "
413 "0x%08x -> 0x%08x\n", i,
414 cur_offset, slave->offset);
415 }
416 }
417 if (slave->mtd.size == MTDPART_SIZ_FULL)
418 slave->mtd.size = master->size - slave->offset;
419 cur_offset = slave->offset + slave->mtd.size; 501 cur_offset = slave->offset + slave->mtd.size;
420
421 printk (KERN_NOTICE "0x%08x-0x%08x : \"%s\"\n", slave->offset,
422 slave->offset + slave->mtd.size, slave->mtd.name);
423
424 /* let's do some sanity checks */
425 if (slave->offset >= master->size) {
426 /* let's register it anyway to preserve ordering */
427 slave->offset = 0;
428 slave->mtd.size = 0;
429 printk ("mtd: partition \"%s\" is out of reach -- disabled\n",
430 parts[i].name);
431 }
432 if (slave->offset + slave->mtd.size > master->size) {
433 slave->mtd.size = master->size - slave->offset;
434 printk ("mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#x\n",
435 parts[i].name, master->name, slave->mtd.size);
436 }
437 if (master->numeraseregions>1) {
438 /* Deal with variable erase size stuff */
439 int i;
440 struct mtd_erase_region_info *regions = master->eraseregions;
441
442 /* Find the first erase regions which is part of this partition. */
443 for (i=0; i < master->numeraseregions && slave->offset >= regions[i].offset; i++)
444 ;
445
446 for (i--; i < master->numeraseregions && slave->offset + slave->mtd.size > regions[i].offset; i++) {
447 if (slave->mtd.erasesize < regions[i].erasesize) {
448 slave->mtd.erasesize = regions[i].erasesize;
449 }
450 }
451 } else {
452 /* Single erase size */
453 slave->mtd.erasesize = master->erasesize;
454 }
455
456 if ((slave->mtd.flags & MTD_WRITEABLE) &&
457 (slave->offset % slave->mtd.erasesize)) {
458 /* Doesn't start on a boundary of major erase size */
459 /* FIXME: Let it be writable if it is on a boundary of _minor_ erase size though */
460 slave->mtd.flags &= ~MTD_WRITEABLE;
461 printk ("mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n",
462 parts[i].name);
463 }
464 if ((slave->mtd.flags & MTD_WRITEABLE) &&
465 (slave->mtd.size % slave->mtd.erasesize)) {
466 slave->mtd.flags &= ~MTD_WRITEABLE;
467 printk ("mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
468 parts[i].name);
469 }
470
471 slave->mtd.ecclayout = master->ecclayout;
472 if (master->block_isbad) {
473 uint32_t offs = 0;
474
475 while(offs < slave->mtd.size) {
476 if (master->block_isbad(master,
477 offs + slave->offset))
478 slave->mtd.ecc_stats.badblocks++;
479 offs += slave->mtd.erasesize;
480 }
481 }
482
483 if(parts[i].mtdp)
484 { /* store the object pointer (caller may or may not register it */
485 *parts[i].mtdp = &slave->mtd;
486 slave->registered = 0;
487 }
488 else
489 {
490 /* register our partition */
491 add_mtd_device(&slave->mtd);
492 slave->registered = 1;
493 }
494 } 502 }
495 503
496 return 0; 504 return 0;
generated by cgit v1.2.2 (git 2.25.0) at 2025-11-30 13:37:45 -0500