diff options
author | Heiko Schocher <hs@denx.de> | 2014-06-24 10:10:04 +0200 |
---|---|---|
committer | Tom Rini <trini@ti.com> | 2014-08-25 19:25:55 -0400 |
commit | ff94bc40af3481d47546595ba73c136de6af6929 (patch) | |
tree | 858119077e2ca8a992589185c36bd431e4a8c80e /drivers/mtd/mtdconcat.c | |
parent | 0c06db59836746c5caf397e642cd0f2bf1cc20a6 (diff) | |
download | u-boot-imx-ff94bc40af3481d47546595ba73c136de6af6929.zip u-boot-imx-ff94bc40af3481d47546595ba73c136de6af6929.tar.gz u-boot-imx-ff94bc40af3481d47546595ba73c136de6af6929.tar.bz2 |
mtd, ubi, ubifs: resync with Linux-3.14
resync ubi subsystem with linux:
commit 455c6fdbd219161bd09b1165f11699d6d73de11c
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sun Mar 30 20:40:15 2014 -0700
Linux 3.14
A nice side effect of this, is we introduce UBI Fastmap support
to U-Boot.
Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Tom Rini <trini@ti.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Sergey Lapin <slapin@ossfans.org>
Cc: Scott Wood <scottwood@freescale.com>
Cc: Joerg Krause <jkrause@posteo.de>
Diffstat (limited to 'drivers/mtd/mtdconcat.c')
-rw-r--r-- | drivers/mtd/mtdconcat.c | 230 |
1 files changed, 215 insertions, 15 deletions
diff --git a/drivers/mtd/mtdconcat.c b/drivers/mtd/mtdconcat.c index 31e4289..39daeab 100644 --- a/drivers/mtd/mtdconcat.c +++ b/drivers/mtd/mtdconcat.c @@ -1,16 +1,32 @@ /* * MTD device concatenation layer * - * (C) 2002 Robert Kaiser <rkaiser@sysgo.de> + * Copyright © 2002 Robert Kaiser <rkaiser@sysgo.de> + * Copyright © 2002-2010 David Woodhouse <dwmw2@infradead.org> * * NAND support by Christian Gan <cgan@iders.ca> * - * This code is GPL + * SPDX-License-Identifier: GPL-2.0+ + * */ -#include <linux/mtd/mtd.h> +#define __UBOOT__ +#ifndef __UBOOT__ +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/sched.h> +#include <linux/types.h> +#include <linux/backing-dev.h> +#include <asm/div64.h> +#else +#include <div64.h> #include <linux/compat.h> +#endif + +#include <linux/mtd/mtd.h> #include <linux/mtd/concat.h> + #include <ubi_uboot.h> /* @@ -51,7 +67,9 @@ concat_read(struct mtd_info *mtd, loff_t from, size_t len, int ret = 0, err; int i; +#ifdef __UBOOT__ *retlen = 0; +#endif for (i = 0; i < concat->num_subdev; i++) { struct mtd_info *subdev = concat->subdev[i]; @@ -105,7 +123,9 @@ concat_write(struct mtd_info *mtd, loff_t to, size_t len, int err = -EINVAL; int i; +#ifdef __UBOOT__ *retlen = 0; +#endif for (i = 0; i < concat->num_subdev; i++) { struct mtd_info *subdev = concat->subdev[i]; @@ -137,6 +157,83 @@ concat_write(struct mtd_info *mtd, loff_t to, size_t len, return err; } +#ifndef __UBOOT__ +static int +concat_writev(struct mtd_info *mtd, const struct kvec *vecs, + unsigned long count, loff_t to, size_t * retlen) +{ + struct mtd_concat *concat = CONCAT(mtd); + struct kvec *vecs_copy; + unsigned long entry_low, entry_high; + size_t total_len = 0; + int i; + int err = -EINVAL; + + /* Calculate total length of data */ + for (i = 0; i < count; i++) + total_len += vecs[i].iov_len; + + /* Check alignment */ + if (mtd->writesize > 1) { + uint64_t __to = to; + if (do_div(__to, mtd->writesize) || (total_len % mtd->writesize)) + return -EINVAL; + } + + /* make a copy of vecs */ + vecs_copy = kmemdup(vecs, sizeof(struct kvec) * count, GFP_KERNEL); + if (!vecs_copy) + return -ENOMEM; + + entry_low = 0; + for (i = 0; i < concat->num_subdev; i++) { + struct mtd_info *subdev = concat->subdev[i]; + size_t size, wsize, retsize, old_iov_len; + + if (to >= subdev->size) { + to -= subdev->size; + continue; + } + + size = min_t(uint64_t, total_len, subdev->size - to); + wsize = size; /* store for future use */ + + entry_high = entry_low; + while (entry_high < count) { + if (size <= vecs_copy[entry_high].iov_len) + break; + size -= vecs_copy[entry_high++].iov_len; + } + + old_iov_len = vecs_copy[entry_high].iov_len; + vecs_copy[entry_high].iov_len = size; + + err = mtd_writev(subdev, &vecs_copy[entry_low], + entry_high - entry_low + 1, to, &retsize); + + vecs_copy[entry_high].iov_len = old_iov_len - size; + vecs_copy[entry_high].iov_base += size; + + entry_low = entry_high; + + if (err) + break; + + *retlen += retsize; + total_len -= wsize; + + if (total_len == 0) + break; + + err = -EINVAL; + to = 0; + } + + kfree(vecs_copy); + return err; +} +#endif + static int concat_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops) { @@ -204,7 +301,7 @@ concat_write_oob(struct mtd_info *mtd, loff_t to, struct mtd_oob_ops *ops) if (!(mtd->flags & MTD_WRITEABLE)) return -EROFS; - ops->retlen = 0; + ops->retlen = ops->oobretlen = 0; for (i = 0; i < concat->num_subdev; i++) { struct mtd_info *subdev = concat->subdev[i]; @@ -219,7 +316,7 @@ concat_write_oob(struct mtd_info *mtd, loff_t to, struct mtd_oob_ops *ops) devops.len = subdev->size - to; err = mtd_write_oob(subdev, to, &devops); - ops->retlen += devops.retlen; + ops->retlen += devops.oobretlen; if (err) return err; @@ -243,6 +340,9 @@ concat_write_oob(struct mtd_info *mtd, loff_t to, struct mtd_oob_ops *ops) static void concat_erase_callback(struct erase_info *instr) { /* Nothing to do here in U-Boot */ +#ifndef __UBOOT__ + wake_up((wait_queue_head_t *) instr->priv); +#endif } static int concat_dev_erase(struct mtd_info *mtd, struct erase_info *erase) @@ -316,7 +416,7 @@ static int concat_erase(struct mtd_info *mtd, struct erase_info *instr) * to-be-erased area begins. Verify that the starting * offset is aligned to this region's erase size: */ - if (instr->addr & (erase_regions[i].erasesize - 1)) + if (i < 0 || instr->addr & (erase_regions[i].erasesize - 1)) return -EINVAL; /* @@ -329,8 +429,8 @@ static int concat_erase(struct mtd_info *mtd, struct erase_info *instr) /* * check if the ending offset is aligned to this region's erase size */ - if ((instr->addr + instr->len) & (erase_regions[i].erasesize - - 1)) + if (i < 0 || ((instr->addr + instr->len) & + (erase_regions[i].erasesize - 1))) return -EINVAL; } @@ -422,7 +522,6 @@ static int concat_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) size = len; err = mtd_lock(subdev, ofs, size); - if (err) break; @@ -457,7 +556,6 @@ static int concat_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) size = len; err = mtd_unlock(subdev, ofs, size); - if (err) break; @@ -483,6 +581,32 @@ static void concat_sync(struct mtd_info *mtd) } } +#ifndef __UBOOT__ +static int concat_suspend(struct mtd_info *mtd) +{ + struct mtd_concat *concat = CONCAT(mtd); + int i, rc = 0; + + for (i = 0; i < concat->num_subdev; i++) { + struct mtd_info *subdev = concat->subdev[i]; + if ((rc = mtd_suspend(subdev)) < 0) + return rc; + } + return rc; +} + +static void concat_resume(struct mtd_info *mtd) +{ + struct mtd_concat *concat = CONCAT(mtd); + int i; + + for (i = 0; i < concat->num_subdev; i++) { + struct mtd_info *subdev = concat->subdev[i]; + mtd_resume(subdev); + } +} +#endif + static int concat_block_isbad(struct mtd_info *mtd, loff_t ofs) { struct mtd_concat *concat = CONCAT(mtd); @@ -511,9 +635,6 @@ static int concat_block_markbad(struct mtd_info *mtd, loff_t ofs) struct mtd_concat *concat = CONCAT(mtd); int i, err = -EINVAL; - if (!mtd_can_have_bb(concat->subdev[0])) - return 0; - for (i = 0; i < concat->num_subdev; i++) { struct mtd_info *subdev = concat->subdev[i]; @@ -532,6 +653,32 @@ static int concat_block_markbad(struct mtd_info *mtd, loff_t ofs) } /* + * try to support NOMMU mmaps on concatenated devices + * - we don't support subdev spanning as we can't guarantee it'll work + */ +static unsigned long concat_get_unmapped_area(struct mtd_info *mtd, + unsigned long len, + unsigned long offset, + unsigned long flags) +{ + struct mtd_concat *concat = CONCAT(mtd); + int i; + + for (i = 0; i < concat->num_subdev; i++) { + struct mtd_info *subdev = concat->subdev[i]; + + if (offset >= subdev->size) { + offset -= subdev->size; + continue; + } + + return mtd_get_unmapped_area(subdev, len, offset, flags); + } + + return (unsigned long) -ENOSYS; +} + +/* * This function constructs a virtual MTD device by concatenating * num_devs MTD devices. A pointer to the new device object is * stored to *new_dev upon success. This function does _not_ @@ -539,17 +686,22 @@ static int concat_block_markbad(struct mtd_info *mtd, loff_t ofs) */ struct mtd_info *mtd_concat_create(struct mtd_info *subdev[], /* subdevices to concatenate */ int num_devs, /* number of subdevices */ +#ifndef __UBOOT__ const char *name) +#else + char *name) +#endif { /* name for the new device */ int i; size_t size; struct mtd_concat *concat; uint32_t max_erasesize, curr_erasesize; int num_erase_region; + int max_writebufsize = 0; debug("Concatenating MTD devices:\n"); for (i = 0; i < num_devs; i++) - debug("(%d): \"%s\"\n", i, subdev[i]->name); + printk(KERN_NOTICE "(%d): \"%s\"\n", i, subdev[i]->name); debug("into device \"%s\"\n", name); /* allocate the device structure */ @@ -565,16 +717,26 @@ struct mtd_info *mtd_concat_create(struct mtd_info *subdev[], /* subdevices to c /* * Set up the new "super" device's MTD object structure, check for - * incompatibilites between the subdevices. + * incompatibilities between the subdevices. */ concat->mtd.type = subdev[0]->type; concat->mtd.flags = subdev[0]->flags; concat->mtd.size = subdev[0]->size; concat->mtd.erasesize = subdev[0]->erasesize; concat->mtd.writesize = subdev[0]->writesize; + + for (i = 0; i < num_devs; i++) + if (max_writebufsize < subdev[i]->writebufsize) + max_writebufsize = subdev[i]->writebufsize; + concat->mtd.writebufsize = max_writebufsize; + concat->mtd.subpage_sft = subdev[0]->subpage_sft; concat->mtd.oobsize = subdev[0]->oobsize; concat->mtd.oobavail = subdev[0]->oobavail; +#ifndef __UBOOT__ + if (subdev[0]->_writev) + concat->mtd._writev = concat_writev; +#endif if (subdev[0]->_read_oob) concat->mtd._read_oob = concat_read_oob; if (subdev[0]->_write_oob) @@ -586,6 +748,10 @@ struct mtd_info *mtd_concat_create(struct mtd_info *subdev[], /* subdevices to c concat->mtd.ecc_stats.badblocks = subdev[0]->ecc_stats.badblocks; +#ifndef __UBOOT__ + concat->mtd.backing_dev_info = subdev[0]->backing_dev_info; +#endif + concat->subdev[0] = subdev[0]; for (i = 1; i < num_devs; i++) { @@ -613,6 +779,16 @@ struct mtd_info *mtd_concat_create(struct mtd_info *subdev[], /* subdevices to c subdev[i]->flags & MTD_WRITEABLE; } +#ifndef __UBOOT__ + /* only permit direct mapping if the BDIs are all the same + * - copy-mapping is still permitted + */ + if (concat->mtd.backing_dev_info != + subdev[i]->backing_dev_info) + concat->mtd.backing_dev_info = + &default_backing_dev_info; +#endif + concat->mtd.size += subdev[i]->size; concat->mtd.ecc_stats.badblocks += subdev[i]->ecc_stats.badblocks; @@ -641,6 +817,11 @@ struct mtd_info *mtd_concat_create(struct mtd_info *subdev[], /* subdevices to c concat->mtd._sync = concat_sync; concat->mtd._lock = concat_lock; concat->mtd._unlock = concat_unlock; +#ifndef __UBOOT__ + concat->mtd._suspend = concat_suspend; + concat->mtd._resume = concat_resume; +#endif + concat->mtd._get_unmapped_area = concat_get_unmapped_area; /* * Combine the erase block size info of the subdevices: @@ -771,3 +952,22 @@ struct mtd_info *mtd_concat_create(struct mtd_info *subdev[], /* subdevices to c return &concat->mtd; } + +/* + * This function destroys an MTD object obtained from concat_mtd_devs() + */ + +void mtd_concat_destroy(struct mtd_info *mtd) +{ + struct mtd_concat *concat = CONCAT(mtd); + if (concat->mtd.numeraseregions) + kfree(concat->mtd.eraseregions); + kfree(concat); +} + +EXPORT_SYMBOL(mtd_concat_create); +EXPORT_SYMBOL(mtd_concat_destroy); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Robert Kaiser <rkaiser@sysgo.de>"); +MODULE_DESCRIPTION("Generic support for concatenating of MTD devices"); |