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path: root/drivers/mtd/mtdpart.c (follow)
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* fs: introduce f_op->mmap_capabilities for nommu mmap supportChristoph Hellwig2015-01-201-1/+0
| | | | | | | | | | | | | | | | | | | Since "BDI: Provide backing device capability information [try #3]" the backing_dev_info structure also provides flags for the kind of mmap operation available in a nommu environment, which is entirely unrelated to it's original purpose. Introduce a new nommu-only file operation to provide this information to the nommu mmap code instead. Splitting this from the backing_dev_info structure allows to remove lots of backing_dev_info instance that aren't otherwise needed, and entirely gets rid of the concept of providing a backing_dev_info for a character device. It also removes the need for the mtd_inodefs filesystem. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Tejun Heo <tj@kernel.org> Acked-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Jens Axboe <axboe@fb.com>
* mtd: Account for BBT blocks when a partition is being allocatedEzequiel Garcia2014-07-091-1/+3
| | | | | | | | | | With the introduction of mtd_block_isreserved(), it's now possible to fix the bad and reserved block distribution exposed by ecc_stats, instead of accounting all the bad or reserved blocks as 'bad'. Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Tested-by: Pekon Gupta <pekon@ti.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
* mtd: Introduce mtd_block_isreserved()Ezequiel Garcia2014-07-091-0/+9
| | | | | | | | | | | | | | In addition to mtd_block_isbad(), which checks if a block is bad or reserved, it's needed to check if a block is reserved only (but not bad). This commit adds an MTD interface for it, in a similar fashion to mtd_block_isbad(). While here, fix mtd_block_isbad() so the out-of-bounds checking is done before the callback check. Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Tested-by: Pekon Gupta <pekon@ti.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
* mtd: Add a retlen parameter to _get_{fact,user}_prot_infoChristian Riesch2014-03-111-6/+8
| | | | | | Signed-off-by: Christian Riesch <christian.riesch@omicron.at> Cc: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
* mtd: make register_mtd_parser return voidAxel Lin2014-01-031-3/+1
| | | | | | | register_mtd_parser never fails; hence make it return void. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
* mtd: make deregister_mtd_parser return voidAxel Lin2014-01-031-2/+1
| | | | | | | deregister_mtd_parser never fails; hence make it return void. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
* mtd: make mtd_partition.name constGeert Uytterhoeven2014-01-031-1/+1
| | | | | | | This allows to drop a few casts. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
* mtd: set the ecc step size for master/slave mtd_infoHuang Shijie2013-08-301-0/+1
| | | | | | | | | Set the ecc step size for master/slave mtd_info{}. Signed-off-by: Huang Shijie <b32955@freescale.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: mtdcore: use const qualifierArtem Bityutskiy2013-04-051-1/+1
| | | | | | | Be a bit stricter and add few more 'const' qualifiers. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: add 'const' qualifier to a couple of register functionsArtem Bityutskiy2013-04-051-1/+1
| | | | | | | | | | | | | | | 'mtd_device_parse_register()' and 'parse_mtd_partitions()' functions accept a an array of character pointers. These functions modify neither the pointers nor the characters they point to. The characters are actually names of the MTD parsers. At the moment, the argument type is 'const char **', which means that only the names of the parsers are constant. Let's turn the argument type into 'const char * const *', which means that both names and the pointers which point to them are constant. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* Merge tag 'disintegrate-mtd-20121009' of ↵David Woodhouse2012-10-091-1/+11
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.infradead.org/users/dhowells/linux-headers UAPI Disintegration 2012-10-09 Conflicts: MAINTAINERS arch/arm/configs/bcmring_defconfig arch/arm/mach-imx/clk-imx51-imx53.c drivers/mtd/nand/Kconfig drivers/mtd/nand/bcm_umi_nand.c drivers/mtd/nand/nand_bcm_umi.h drivers/mtd/nand/orion_nand.c
| * mtd: mtdparts: introduce mtd_get_device_sizeRichard Genoud2012-09-041-0/+10
| | | | | | | | | | | | | | | | | | | | | | 'mtd_get_device_size()' returns the size of the whole MTD device, that is the mtd_info master size. This will be used by UBI to calculate the maximum number of bad blocks (MBB) on a MTD device. Artem: amended the patch a bit. Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
| * mtd: mark mtd_is_partition argument as constantRichard Genoud2012-09-041-1/+1
| | | | | | | | | | | | | | | | 'struct mtd_info' is not modified by 'mtd_is_partition()' so it can be marked as "const". Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
* | mtd: mtdpart: break it as soon as we parse out the partitionsHuang Shijie2012-09-291-1/+4
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | We may cause a memory leak when the @types has more then one parser. Take the `default_mtd_part_types` for example. The default_mtd_part_types has two parsers now: `cmdlinepart` and `ofpart`. Assume the following case: The kernel command line sets the partitions like: #gpmi-nand:20m(boot),20m(kernel),1g(rootfs),-(user) But the devicetree file(such as arch/arm/boot/dts/imx28-evk.dts) also sets the same partitions as the kernel command line does. In the current code, the partitions parsed out by the `ofpart` will overwrite the @pparts which has already set by the `cmdlinepart` parser, and the the partitions parsed out by the `cmdlinepart` is missed. A memory leak occurs. So we should break the code as soon as we parse out the partitions, In actually, this patch makes a priority order between the parsers. If one parser has already parsed out the partitions successfully, it's no need to use another parser anymore. Signed-off-by: Huang Shijie <shijie8@gmail.com> Cc: stable@vger.kernel.org Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: driver _read() returns max_bitflips; mtd_read() returns -EUCLEANMike Dunn2012-05-141-6/+6
| | | | | | | | | | | | | | | | | | | | | | | The drivers' _read() method, absent an error, returns a non-negative integer indicating the maximum number of bit errors that were corrected in any one region comprising an ecc step. MTD returns -EUCLEAN if this is >= bitflip_threshold, 0 otherwise. If bitflip_threshold is zero, the comparison is not made since these devices lack ECC and always return zero in the non-error case (thanks Brian)¹. Note that this is a subtle change to the driver interface. This and the preceding patches in this set were tested with ubi on top of the nandsim and docg4 devices, running the ubi test io_basic from mtd-utils. ¹ http://lists.infradead.org/pipermail/linux-mtd/2012-March/040468.html Signed-off-by: Mike Dunn <mikedunn@newsguy.com> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Acked-by: Brian Norris <computersforpeace@gmail.com> Ivan Djelic <ivan.djelic@parrot.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: bitflip_threshold added to mtd_info and sysfsMike Dunn2012-05-141-0/+2
| | | | | | | | | | | | | | | | An element 'bitflip_threshold' is added to struct mtd_info, and also exposed as a read/write variable in sysfs. This will be used to determine whether or not mtd_read() returns -EUCLEAN or 0 (absent a hard error). If the driver leaves it as zero, mtd will set it to a default value of ecc_strength. This v2 adds the line that propagates bitflip_threshold from the master to the partitions - thanks Ivan¹. ¹ http://lists.infradead.org/pipermail/linux-mtd/2012-April/040900.html Signed-off-by: Mike Dunn <mikedunn@newsguy.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: flash drivers set ecc strengthMike Dunn2012-03-271-0/+1
| | | | | | | | | | | | | | | | | Flash device drivers initialize 'ecc_strength' in struct mtd_info, which is the maximum number of bit errors that can be corrected in one writesize region. Drivers using the nand interface intitialize 'strength' in struct nand_ecc_ctrl, which is the maximum number of bit errors that can be corrected in one ecc step. Nand infrastructure code translates this to 'ecc_strength'. Also for nand drivers, the nand infrastructure code sets ecc.strength for ecc modes NAND_ECC_SOFT, NAND_ECC_SOFT_BCH, and NAND_ECC_NONE. It is set in the driver for all other modes. Signed-off-by: Mike Dunn <mikedunn@newsguy.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: fix partition wrapper functionsMike Dunn2012-03-271-27/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch reverts a change that may have been mistakenly included with the set of patches that introduced the new mtd api entry functions. Or perhaps I am mistaken :) The problem is in the partition wrapper functions, where the calls to the driver methods were replaced with calls to the new mtd api functions. This causes the api function to be called a second time, further down the call stack. This is not only unnecessary and redundant - because the sanity checking code and (more restrictive) bounds checks for the partition were done in the first call - but is potentially problematic and confusing. For example, the call stack for a call to mtd_read() on a partitioned device currently looks like this: mtd_read() gets struct mtd_info for the partition | +-> part_read() via the pointer assigned when the partition was created | +->mtd_read() this time gets struct mtd_info for the master | +->xyz_driver_read() via the pointer asigned by the driver It seems that this can cause a variety of problems. For example, if you want to add code to the api function that tests a value in mtd_info that is relevant only to the partition. Or (in my case) you want the driver to return a value that may be different from that returned by the mtd api function. This patch eliminates the second call to the mtd api function. It was tested on the docg4 nand driver with a subset of the api functions, but I inspected the rest and don't see any problems. Signed-off-by: Mike Dunn <mikedunn@newsguy.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: remove R/O checking duplicationArtem Bityutskiy2012-03-271-13/+1
| | | | | | | | | | | Many drivers check whether the partition is R/O and return -EROFS if yes. Let's stop having duplicated checks and move them to the API functions instead. And again a bit of noise - deleted few too sparse newlines, sorry. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: do not duplicate length and offset checks in driversArtem Bityutskiy2012-03-271-29/+1
| | | | | | | | | | | | | | | | | | | | | | | | | We already verify that offset and length are within the MTD device size in the MTD API functions. Let's remove the duplicated checks in drivers. This patch only affects the following API's: 'mtd_erase()' 'mtd_point()' 'mtd_unpoint()' 'mtd_get_unmapped_area()' 'mtd_read()' 'mtd_write()' 'mtd_panic_write()' 'mtd_lock()' 'mtd_unlock()' 'mtd_is_locked()' 'mtd_block_isbad()' 'mtd_block_markbad()' This patch adds a bit of noise by removing too sparse empty lines, but this is not too bad. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: return error code from mtd_unpointArtem Bityutskiy2012-03-271-2/+2
| | | | | | | | | | | | | The 'mtd_unpoint()' API function should be able to return an error code because it may fail if you specify incorrect offset. This patch changes this MTD API function and amends all the drivers correspondingly. Also return '-EOPNOTSUPP' from 'mtd_unpoint()' when the '->unpoint()' method is undefined. We do not really need this currently, but this just makes sense to be consistent with 'mtd_point()'. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: add leading underscore to all mtd functionsArtem Bityutskiy2012-03-271-45/+46
| | | | | | | | | | | | | | | | | | | | | This patch renames all MTD functions by adding a "_" prefix: mtd->erase -> mtd->_erase mtd->read_oob -> mtd->_read_oob ... The reason is that we are re-working the MTD API and from now on it is an error to use MTD function pointers directly - we have a corresponding API call for every pointer. By adding a leading "_" we achieve the following: 1. Make sure we convert every direct pointer users 2. A leading "_" suggests that this interface is internal and it becomes less likely that people will use them directly 3. Make sure all the out-of-tree modules stop compiling and the owners spot the big API change and amend them. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: minor coding style cleanup in mtdpart.cStefan Roese2012-03-271-1/+1
| | | | | | Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_block_markbad interfaceArtem Bityutskiy2012-01-091-1/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_block_isbad interfaceArtem Bityutskiy2012-01-091-3/+2
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_resume interfaceArtem Bityutskiy2012-01-091-1/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_suspend interfaceArtem Bityutskiy2012-01-091-1/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_is_locked interfaceArtem Bityutskiy2012-01-091-1/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_unlock interfaceArtem Bityutskiy2012-01-091-1/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_lock interfaceArtem Bityutskiy2012-01-091-1/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_sync interfaceArtem Bityutskiy2012-01-091-1/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_writev interfaceArtem Bityutskiy2012-01-091-2/+2
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_lock_user_prot_reg interfaceArtem Bityutskiy2012-01-091-1/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_write_user_prot_reg interfaceArtem Bityutskiy2012-01-091-2/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_read_user_prot_reg interfaceArtem Bityutskiy2012-01-091-2/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_get_user_prot_info interfaceArtem Bityutskiy2012-01-091-1/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_read_fact_prot_reg interfaceArtem Bityutskiy2012-01-091-2/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_get_fact_prot_info interfaceArtem Bityutskiy2012-01-091-1/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_write_oob interfaceArtem Bityutskiy2012-01-091-1/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_read_oob interfaceArtem Bityutskiy2012-01-091-1/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_panic_write interfaceArtem Bityutskiy2012-01-091-2/+2
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_write interfaceArtem Bityutskiy2012-01-091-2/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_read interfaceArtem Bityutskiy2012-01-091-2/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_get_unmapped_area interfaceArtem Bityutskiy2012-01-091-2/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_unpoint interfaceArtem Bityutskiy2012-01-091-1/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_point interfaceArtem Bityutskiy2012-01-091-2/+2
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_erase interfaceArtem Bityutskiy2012-01-091-1/+1
| | | | | | | | | | | | | | | | | | | This patch is part of a patch-set which changes the MTD interface from 'mtd->func()' form to 'mtd_func()' form. We need this because we want to add common code to to all drivers in the mtd core level, which is impossible with the current interface when MTD clients call driver functions like 'read()' or 'write()' directly. At this point we just introduce a new inline wrapper function, but later some of them are expected to gain more code. E.g., the input parameters check should be moved to the wrappers rather than be duplicated at many drivers. This particular patch introduced the 'mtd_erase()' interface. The following patches add all the other interfaces one by one. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: utilize `mtd_is_*()' functionsBrian Norris2011-09-211-4/+4
| | | | | Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@intel.com>
* mtd: rename MTD_OOB_* to MTD_OPS_*Brian Norris2011-09-111-1/+1
| | | | | | | | | | These modes are not necessarily for OOB only. Particularly, MTD_OOB_RAW affected operations on in-band page data as well. To clarify these options and to emphasize that their effect is applied per-operation, we change the primary prefix to MTD_OPS_. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@intel.com>
* mtd: remove put_partition_parser() from public headerDmitry Eremin-Solenikov2011-09-111-0/+2
| | | | | | | | There is no need to pollute public header with a definition private to mtdpart.c. Move it from mtd/partitions.h to mtdpart.c Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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