drivers/mtd/inftlcore.c

29  * Maximum number of loops while examining next block, to have a
216 	/* Scan for a free block */
242 	int block, silly;
263 	 * 512-byte block within the Chain.
267 		for (block = 0; block < inftl->EraseSize/SECTORSIZE; block ++) {
268 			if ((BlockMap[block] != BLOCK_NIL) ||
269 			    BlockDeleted[block])
273 					   + (block * SECTORSIZE), 16, &retlen,
284 				BlockMap[block] = thisEUN;
287 				BlockDeleted[block] = 1;
291 					"for block %d in EUN %d: %x\n",
292 					block, thisEUN, status);
307 	 * OK. We now know the location of every block in the Virtual Unit
313 	for (block = 0; block < inftl->EraseSize/SECTORSIZE ; block++) {
321 		if (BlockMap[block] == targetEUN || (pendingblock ==
322 		    (thisVUC * (inftl->EraseSize / SECTORSIZE) + block))) {
327 		 * Copy only in non free block (free blocks can only
330 		if (BlockMap[block] == BLOCK_NIL)
334 			       (inftl->EraseSize * BlockMap[block]) + (block * SECTORSIZE),
340 				       (inftl->EraseSize * BlockMap[block]) + (block * SECTORSIZE),
351 			    (block * SECTORSIZE), SECTORSIZE, &retlen,
376 		/* Unlink the last block from the chain. */
382 			 * Could not erase : mark block as reserved.
458  *                      for this block. Make it available if it isn't already.
460 static inline u16 INFTL_findwriteunit(struct INFTLrecord *inftl, unsigned block)
462 	unsigned int thisVUC = block / (inftl->EraseSize / SECTORSIZE);
464 	unsigned long blockofs = (block * SECTORSIZE) & (inftl->EraseSize -1);
472 	pr_debug("INFTL: INFTL_findwriteunit(inftl=%p,block=%d)\n",
473 			inftl, block);
478 		 * a free space for the block in question.
489 			pr_debug("INFTL: status of block %d in EUN %d is %x\n",
490 					block , writeEUN, status);
504 				 * Invalid block. Don't use it any more.
516 			/* Skip to next block in chain */
537 			thisEUN = INFTL_makefreeblock(inftl, block);
566 		 * Insert new block into virtual chain. Firstly update the
567 		 * block headers in flash...
631 	int block, silly;
654 		for (block = 0; block < inftl->EraseSize/SECTORSIZE; block++) {
655 			if (BlockUsed[block] || BlockDeleted[block])
659 					   + (block * SECTORSIZE), 8 , &retlen,
670 				BlockUsed[block] = 1;
673 				BlockDeleted[block] = 1;
677 					"for block %d in EUN %d: 0x%x\n",
678 					block, thisEUN, status);
691 	for (block = 0; block < inftl->EraseSize/SECTORSIZE; block++)
692 		if (BlockUsed[block])
696 	 * For each block in the chain free it and make it available
724 			 * Could not erase : mark block as reserved.
745 static int INFTL_deleteblock(struct INFTLrecord *inftl, unsigned block)
747 	unsigned int thisEUN = inftl->VUtable[block / (inftl->EraseSize / SECTORSIZE)];
748 	unsigned long blockofs = (block * SECTORSIZE) & (inftl->EraseSize - 1);
756 		"block=%d)\n", inftl, block);
776 				"block %d in EUN %d: 0x%x\n",
777 				block, thisEUN, status);
784 				block / (inftl->EraseSize / SECTORSIZE));
799 		INFTL_trydeletechain(inftl, block / (inftl->EraseSize / SECTORSIZE));
804 static int inftl_writeblock(struct mtd_blktrans_dev *mbd, unsigned long block,
809 	unsigned long blockofs = (block * SECTORSIZE) & (inftl->EraseSize - 1);
814 	pr_debug("INFTL: inftl_writeblock(inftl=%p,block=%ld,"
815 		"buffer=%p)\n", inftl, block, buffer);
817 	/* Is block all zero? */
823 		writeEUN = INFTL_findwriteunit(inftl, block);
827 				"block to write to\n");
829 			 * If we _still_ haven't got a block to use,
846 		INFTL_deleteblock(inftl, block);
852 static int inftl_readblock(struct mtd_blktrans_dev *mbd, unsigned long block,
856 	unsigned int thisEUN = inftl->VUtable[block / (inftl->EraseSize / SECTORSIZE)];
857 	unsigned long blockofs = (block * SECTORSIZE) & (inftl->EraseSize - 1);
864 	pr_debug("INFTL: inftl_readblock(inftl=%p,block=%ld,"
865 		"buffer=%p)\n", inftl, block, buffer);
885 				"block %ld in EUN %d: 0x%04x\n",
886 				block, thisEUN, status);
893 				block / (inftl->EraseSize / SECTORSIZE));
902 		/* The requested block is not on the media, return all 0x00 */