Commit Graph

5743 Commits

Author SHA1 Message Date
Linus Torvalds
a379f71a30 Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton:

 - a few block updates that fell in my lap

 - lib/ updates

 - checkpatch

 - autofs

 - ipc

 - a ton of misc other things

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (100 commits)
  mm: split gfp_mask and mapping flags into separate fields
  fs: use mapping_set_error instead of opencoded set_bit
  treewide: remove redundant #include <linux/kconfig.h>
  hung_task: allow hung_task_panic when hung_task_warnings is 0
  kthread: add kerneldoc for kthread_create()
  kthread: better support freezable kthread workers
  kthread: allow to modify delayed kthread work
  kthread: allow to cancel kthread work
  kthread: initial support for delayed kthread work
  kthread: detect when a kthread work is used by more workers
  kthread: add kthread_destroy_worker()
  kthread: add kthread_create_worker*()
  kthread: allow to call __kthread_create_on_node() with va_list args
  kthread/smpboot: do not park in kthread_create_on_cpu()
  kthread: kthread worker API cleanup
  kthread: rename probe_kthread_data() to kthread_probe_data()
  scripts/tags.sh: enable code completion in VIM
  mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping
  kdump, vmcoreinfo: report memory sections virtual addresses
  ipc/sem.c: add cond_resched in exit_sme
  ...
2016-10-11 17:34:10 -07:00
Masahiro Yamada
97139d4a6f treewide: remove redundant #include <linux/kconfig.h>
Kernel source files need not include <linux/kconfig.h> explicitly
because the top Makefile forces to include it with:

  -include $(srctree)/include/linux/kconfig.h

This commit removes explicit includes except the following:

  * arch/s390/include/asm/facilities_src.h
  * tools/testing/radix-tree/linux/kernel.h

These two are used for host programs.

Link: http://lkml.kernel.org/r/1473656164-11929-1-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-11 15:06:33 -07:00
Linus Torvalds
4c609922a3 This pull request contains:
* Fixes for both UBI and UBIFS
 * overlayfs support (O_TMPFILE, RENAME_WHITEOUT/EXCHANGE)
 * Code refactoring for the upcoming MLC support
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Merge tag 'upstream-4.9-rc1' of git://git.infradead.org/linux-ubifs

Pull UBI/UBIFS updates from Richard Weinberger:
 "This pull request contains:

   - Fixes for both UBI and UBIFS
   - overlayfs support (O_TMPFILE, RENAME_WHITEOUT/EXCHANGE)
   - Code refactoring for the upcoming MLC support"

[ Ugh, we just got rid of the "rename2()" naming for the extended rename
  functionality. And this re-introduces it in ubifs with the cross-
  renaming and whiteout support.

  But rather than do any re-organizations in the merge itself, the
  naming can be cleaned up later ]

* tag 'upstream-4.9-rc1' of git://git.infradead.org/linux-ubifs: (27 commits)
  UBIFS: improve function-level documentation
  ubifs: fix host xattr_len when changing xattr
  ubifs: Use move variable in ubifs_rename()
  ubifs: Implement RENAME_EXCHANGE
  ubifs: Implement RENAME_WHITEOUT
  ubifs: Implement O_TMPFILE
  ubi: Fix Fastmap's update_vol()
  ubi: Fix races around ubi_refill_pools()
  ubi: Deal with interrupted erasures in WL
  UBI: introduce the VID buffer concept
  UBI: hide EBA internals
  UBI: provide an helper to query LEB information
  UBI: provide an helper to check whether a LEB is mapped or not
  UBI: add an helper to check lnum validity
  UBI: simplify LEB write and atomic LEB change code
  UBI: simplify recover_peb() code
  UBI: move the global ech and vidh variables into struct ubi_attach_info
  UBI: provide helpers to allocate and free aeb elements
  UBI: fastmap: use ubi_io_{read, write}_data() instead of ubi_io_{read, write}()
  UBI: fastmap: use ubi_rb_for_each_entry() in unmap_peb()
  ...
2016-10-11 10:49:44 -07:00
Linus Torvalds
35ff96dfd3 MTD updates for 4.9-rc1
NAND:
 
  * Add the infrastructure to automate NAND timings configuration
  * Provide a generic DT property to maximize ECC strength
  * Some refactoring in the core bad block table handling, to help with
    improving some of the logic in error cases.
  * Minor cleanups and fixes
 
 MTD:
 
  * Add APIs for handling page pairing; this is necessary for reliably
    supporting MLC and TLC NAND flash, where paired-page disturbance affects
    reliability. Upper layers (e.g., UBI) should make use of these in the near
    future.
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Merge tag 'for-linus-20161008' of git://git.infradead.org/linux-mtd

Pull MTD updates from Brian Norris:
 "I've not been very active this cycle, so these are mostly from Boris,
  for the NAND flash subsystem.

  NAND:

   - Add the infrastructure to automate NAND timings configuration

   - Provide a generic DT property to maximize ECC strength

   - Some refactoring in the core bad block table handling, to help with
     improving some of the logic in error cases.

   - Minor cleanups and fixes

  MTD:

   - Add APIs for handling page pairing; this is necessary for reliably
     supporting MLC and TLC NAND flash, where paired-page disturbance
     affects reliability. Upper layers (e.g., UBI) should make use of
     these in the near future"

* tag 'for-linus-20161008' of git://git.infradead.org/linux-mtd: (35 commits)
  mtd: nand: fix trivial spelling error
  mtdpart: Propagate _get/put_device()
  mtd: nand: Provide nand_cleanup() function to free NAND related resources
  mtd: Kill the OF_MTD Kconfig option
  mtd: nand: mxc: Test CONFIG_OF instead of CONFIG_OF_MTD
  mtd: nand: Fix nand_command_lp() for 8bits opcodes
  mtd: nand: sunxi: Support ECC maximization
  mtd: nand: Support maximizing ECC when using software BCH
  mtd: nand: Add an option to maximize the ECC strength
  mtd: nand: mxc: Add timing setup for v2 controllers
  mtd: nand: mxc: implement onfi get/set features
  mtd: nand: sunxi: switch from manual to automated timing config
  mtd: nand: automate NAND timings selection
  mtd: nand: Expose data interface for ONFI mode 0
  mtd: nand: Add function to convert ONFI mode to data_interface
  mtd: nand: convert ONFI mode into data interface
  mtd: nand: Introduce nand_data_interface
  mtd: nand: Create a NAND reset function
  mtd: nand: remove unnecessary 'extern' from function declarations
  MAINTAINERS: Add maintainer entry for Ingenic JZ4780 NAND driver
  ...
2016-10-10 17:39:51 -07:00
Linus Torvalds
12e3d3cdd9 Merge branch 'for-4.9/block-irq' of git://git.kernel.dk/linux-block
Pull blk-mq irq/cpu mapping updates from Jens Axboe:
 "This is the block-irq topic branch for 4.9-rc. It's mostly from
  Christoph, and it allows drivers to specify their own mappings, and
  more importantly, to share the blk-mq mappings with the IRQ affinity
  mappings. It's a good step towards making this work better out of the
  box"

* 'for-4.9/block-irq' of git://git.kernel.dk/linux-block:
  blk_mq: linux/blk-mq.h does not include all the headers it depends on
  blk-mq: kill unused blk_mq_create_mq_map()
  blk-mq: get rid of the cpumask in struct blk_mq_tags
  nvme: remove the post_scan callout
  nvme: switch to use pci_alloc_irq_vectors
  blk-mq: provide a default queue mapping for PCI device
  blk-mq: allow the driver to pass in a queue mapping
  blk-mq: remove ->map_queue
  blk-mq: only allocate a single mq_map per tag_set
  blk-mq: don't redistribute hardware queues on a CPU hotplug event
2016-10-09 17:29:33 -07:00
Brian Norris
69db4aa44f Introduction of the MTD pairing scheme concept.
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Merge tag '4.9/mtd-pairing-scheme' of github.com:linux-nand/linux

Introduction of the MTD pairing scheme concept.
2016-10-08 20:56:54 -07:00
Linus Torvalds
a771151a83 ARM: SoC cleanups for v4.9
The cleanups for v4.9 are a little larger that usual, but thankfully
 that is almost exclusively due to removing a significant number of
 files that have become obsolete after the still ongoing conversion
 of old board files to devicetree.
 
 - for mach-omap2, which is still the largest platform in arch/arm/,
   the conversion to DT is finally complete after the Nokia N900 is
   now fully supported there, along with the omap3 LDP, and we can
   remove those two board files.
   If no regressions are found, another large cleanup for the platform
   will happen as a follow-up, removing dead code and restructuring
   the platform based on being DT-only.
 
 - In mach-imx, similar work is ongoing, but has not come that far.
   This time, we remove the obsolete board file for the i.MX1
   generation, which like i.MX25, i.MX5, i.MX6, and i.MX7 is now DT-only.
   The remaining board files are for i.MX2 and i.MX3 machines
   based on old ARM926 or ARM1136 cores that should work with DT
   in principle.
 
 - realview has just been converted from board files to DT, and a lot
   of code gets removed in the process. This is the last
   ARM/Keil/Versatile derived platform that was still using board
   files, the other ones being integrator, versatile and vexpress.
   We can probably merge the remaining code into a single directory
   in the near future.
 
 - clps711x had completed the conversion in v4.8, but we accidentally
   left the files in place that should have been deleted then.
 
 Conflicts: two files deleted here have been modified upstream,
 the changes can be discarded.
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Merge tag 'armsoc-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC cleanups from Arnd Bergmann:
 "The cleanups for v4.9 are a little larger that usual, but thankfully
  that is almost exclusively due to removing a significant number of
  files that have become obsolete after the still ongoing conversion of
  old board files to devicetree.

   - for mach-omap2, which is still the largest platform in arch/arm/,
     the conversion to DT is finally complete after the Nokia N900 is
     now fully supported there, along with the omap3 LDP, and we can
     remove those two board files. If no regressions are found, another
     large cleanup for the platform will happen as a follow-up, removing
     dead code and restructuring the platform based on being DT-only.

   - In mach-imx, similar work is ongoing, but has not come that far.
     This time, we remove the obsolete board file for the i.MX1
     generation, which like i.MX25, i.MX5, i.MX6, and i.MX7 is now
     DT-only. The remaining board files are for i.MX2 and i.MX3 machines
     based on old ARM926 or ARM1136 cores that should work with DT in
     principle.

   - realview has just been converted from board files to DT, and a lot
     of code gets removed in the process. This is the last
     ARM/Keil/Versatile derived platform that was still using board
     files, the other ones being integrator, versatile and vexpress. We
     can probably merge the remaining code into a single directory in
     the near future.

   - clps711x had completed the conversion in v4.8, but we accidentally
     left the files in place that should have been deleted then"

* tag 'armsoc-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (21 commits)
  ARM: select PCI_DOMAINS config from ARCH_MULTIPLATFORM
  ARM: stop *MIGHT_HAVE_PCI* config from being selected redundantly
  ARM: imx: (trivial) fix typo and grammar
  ARM: clps711x: remove extraneous files
  ARM: imx: use IS_ENABLED() instead of checking for built-in or module
  ARM: OMAP2+: use IS_ENABLED() instead of checking for built-in or module
  ARM: OMAP1: use IS_ENABLED() instead of checking for built-in or module
  ARM: imx: remove platform-mxc_rnga
  ARM: realview: imply device tree boot
  ARM: realview: no need to select SMP_ON_UP explicitly
  ARM: realview: delete the RealView board files
  ARM: imx: no need to select SMP_ON_UP explicitly
  ARM: i.MX: Move SOC_IMX1 into 'Device tree only'
  ARM: i.MX: Remove i.MX1 non-DT support
  ARM: i.MX: Remove i.MX1 Synertronixx SCB9328 board support
  ARM: i.MX: Remove i.MX1 Armadeus APF9328 board support
  ARM: mxs: remove obsolete startup code for TX28
  ARM: i.MX31 iomux: remove duplicates with alternate name
  ARM: i.MX31 iomux: remove plain duplicates
  ARM: OMAP2+: Drop legacy board file for LDP
  ...
2016-10-07 21:16:16 -07:00
Brian Norris
f5b88de284 mtd: nand: fix trivial spelling error
Introduced by commit fde85cfd2d ("mtd: nand: Fix nand_command_lp() for
8bits opcodes") and I didn't have the heart to have Boris rewrite his
pull request just for that. Anyway, there's some value in having stable
commit hashes.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2016-10-03 09:52:23 -07:00
Brian Norris
1e2da4ad2e Notable core changes:
- add the infrastructure to automate NAND timings configuration
 - provide a generic DT property to maximize ECC strength
 
 The rest is just a bunch of minor drivers and core fixes/cleanup
 patches.
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Merge tag 'for-4.9' of github.com:linux-nand/linux

"
Notable core changes:
- add the infrastructure to automate NAND timings configuration
- provide a generic DT property to maximize ECC strength

The rest is just a bunch of minor drivers and core fixes/cleanup
patches.
"

Also not noted: some refactoring in the core bad block table handling,
to help with improving some of the logic in error cases.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2016-10-03 09:51:35 -07:00
Richard Weinberger
f7d11b33d4 ubi: Fix Fastmap's update_vol()
Usually Fastmap is free to consider every PEB in one of the pools
as newer than the existing PEB. Since PEBs in a pool are by definition
newer than everything else.
But update_vol() missed the case that a pool can contain more than
one candidate.

Cc: <stable@vger.kernel.org>
Fixes: dbb7d2a88d ("UBI: Add fastmap core")
Signed-off-by: Richard Weinberger <richard@nod.at>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:55:02 +02:00
Richard Weinberger
2e8f08deab ubi: Fix races around ubi_refill_pools()
When writing a new Fastmap the first thing that happens
is refilling the pools in memory.
At this stage it is possible that new PEBs from the new pools
get already claimed and written with data.
If this happens before the new Fastmap data structure hits the
flash and we face power cut the freshly written PEB will not
scanned and unnoticed.

Solve the issue by locking the pools until Fastmap is written.

Cc: <stable@vger.kernel.org>
Fixes: dbb7d2a88d ("UBI: Add fastmap core")
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:54:01 +02:00
Richard Weinberger
2365418879 ubi: Deal with interrupted erasures in WL
When Fastmap is used we can face here an -EBADMSG
since Fastmap cannot know about unmaps.
If the erasure was interrupted the PEB may show ECC
errors and UBI would go to ro-mode as it assumes
that the PEB was check during attach time, which is
not the case with Fastmap.

Cc: <stable@vger.kernel.org>
Fixes: dbb7d2a88d ("UBI: Add fastmap core")
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:49:54 +02:00
Boris Brezillon
3291b52f9f UBI: introduce the VID buffer concept
Currently, all VID headers are allocated and freed using the
ubi_zalloc_vid_hdr() and ubi_free_vid_hdr() function. These functions
make sure to align allocation on ubi->vid_hdr_alsize and adjust the
vid_hdr pointer to match the ubi->vid_hdr_shift requirements.
This works fine, but is a bit convoluted.
Moreover, the future introduction of LEB consolidation (needed to support
MLC/TLC NANDs) will allows a VID buffer to contain more than one VID
header.

Hence the creation of a ubi_vid_io_buf struct to attach extra information
to the VID header.

We currently only store the actual pointer of the underlying buffer, but
will soon add the number of VID headers contained in the buffer.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:48:14 +02:00
Boris Brezillon
799dca34ac UBI: hide EBA internals
Create a private ubi_eba_table struct to hide EBA internals and provide
helpers to allocate, destroy, copy and assing an EBA table to a volume.

Now that external EBA users are using helpers to query/modify the EBA
state we can safely change the internal representation, which will be
needed to support the LEB consolidation concept.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:48:14 +02:00
Boris Brezillon
1f81a5ccab UBI: provide an helper to query LEB information
This is part of our attempt to hide EBA internals from other part of the
implementation in order to easily adapt it to the MLC needs.

Here we are creating an ubi_eba_leb_desc struct to hide the way we keep
track of the LEB to PEB mapping.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:48:14 +02:00
Boris Brezillon
7554769641 UBI: provide an helper to check whether a LEB is mapped or not
This is part of the process of hiding UBI EBA's internal to other part of
the UBI implementation, so that we can add new information to the EBA
table without having to patch different places in the UBI code.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:48:14 +02:00
Boris Brezillon
9a5f09ac0a UBI: add an helper to check lnum validity
ubi_leb_valid() is here to replace the
lnum < 0 || lnum >= vol->reserved_pebs checks.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:48:14 +02:00
Boris Brezillon
2d78aee426 UBI: simplify LEB write and atomic LEB change code
ubi_eba_write_leb(), ubi_eba_write_leb_st() and
ubi_eba_atomic_leb_change() are using a convoluted retry/exit path.
Add the try_write_vid_and_data() function to simplify the retry logic
and make sure we have a single exit path instead of manually releasing
the resources in each error path.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:48:14 +02:00
Boris Brezillon
f036dfeb85 UBI: simplify recover_peb() code
recover_peb() is using a convoluted retry/exit path. Add try_recover_peb()
to simplify the retry logic and make sure we have a single exit path
instead of manually releasing the resource in each error path.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:48:14 +02:00
Boris Brezillon
7b6b749b12 UBI: move the global ech and vidh variables into struct ubi_attach_info
Even if it works fine with those global variables, attaching the
temporary ech and vidh objects used during UBI scan to the
ubi_attach_info object sounds like a more future-proof option.

For example, attaching several UBI devices in parallel is prevented by
this use of global variable. And also because global variables should
be avoided in general.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:48:14 +02:00
Boris Brezillon
91f4285fe3 UBI: provide helpers to allocate and free aeb elements
This not only hides the aeb allocation internals (which is always good in
case we ever want to change the allocation system), but also helps us
factorize the initialization of some common fields (ec and pnum).

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:48:14 +02:00
Boris Brezillon
fcbb6af17b UBI: fastmap: use ubi_io_{read, write}_data() instead of ubi_io_{read, write}()
ubi_io_{read,write}_data() are wrappers around ubi_io_{read/write}() that
are used to read/write eraseblock payload data, which is exactly what
fastmap does when calling ubi_io_{read,write}().

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:48:14 +02:00
Boris Brezillon
f2fb1346b3 UBI: fastmap: use ubi_rb_for_each_entry() in unmap_peb()
Use the ubi_rb_for_each_entry() macro instead of open-coding it.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:48:14 +02:00
Boris Brezillon
f9efe8d8a5 UBI: factorize destroy_av() and ubi_remove_av() code
Those functions are pretty much doing the same thing, except
ubi_remove_av() is putting the aeb elements attached to the volume into
the ai->erase list and the destroy_av() is freeing them.

Rework destroy_av() to handle both cases.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:48:14 +02:00
Boris Brezillon
de4c455b3e UBI: factorize code used to manipulate volumes at attach time
Volume creation/search code is duplicated in a few places (fastmap and
non fastmap code). Create some helpers to factorize the code.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:48:14 +02:00
Boris Brezillon
5f09aaa9b3 UBI: use vol->usable_leb_size instead of (ubi->leb_size - vol->data_pad)
vol->usable_size is already set to ubi->leb_size - vol->data_pad. Use
vol->usable_size instead of recalculating it.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:48:14 +02:00
Boris Brezillon
ecbfa8eaba UBI: fastmap: scrub PEB when bitflips are detected in a free PEB EC header
scan_pool() does not mark the PEB for scrubing when bitflips are
detected in the EC header of a free PEB (VID header region left to
0xff).
Make sure we scrub the PEB in this case.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Fixes: dbb7d2a88d ("UBI: Add fastmap core")
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:48:14 +02:00
Boris Brezillon
4c368421bc UBI: fastmap: avoid multiple be32_to_cpu() when unneccesary
process_pool_aeb() does several times the be32_to_cpu(new_vh->vol_id)
operation. Create a temporary variable and do it once.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:48:14 +02:00
Boris Brezillon
3f84e454eb UBI: fix add_fastmap() to use the vid_hdr passed in argument
add_fastmap() is passed a ubi_vid_hdr pointer in argument, but is
referencing the global vidh pointer.
Even if this is correct from a functional point of view (vidh and vid_hdr
point to the same object), it is confusing.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:48:14 +02:00
Boris Brezillon
f5f9d43f0a UBI: fastmap: use ubi_find_volume() instead of open coding it
process_pool_aeb() re-implements the logic found in ubi_find_volume().
Call ubi_find_volume() to avoid this duplication.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02 22:48:14 +02:00
Richard Weinberger
5e149073ba mtdpart: Propagate _get/put_device()
If the master device has callbacks for _get/put_device()
and this MTD has slaves a get_mtd_device() call on paritions
will never issue the registered callbacks.
Fix this by propagating _get/put_device() down.

Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2016-09-28 13:00:45 -07:00
Linus Torvalds
ae6dd8d619 Another round of MTD fixes for v4.8
Davinci NAND: fix a long-standing bug in how we clear/prep 4-bit ECC
 
 OMAP NAND: an error-handling fix that made it into v4.8-rc1 caused
 error-handling cases in other configurations/code-paths; this fixes the fix
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Merge tag 'for-linus-20160928' of git://git.infradead.org/linux-mtd

Pull late MTD fixes from Brian Norris:
 "Another round of MTD fixes for v4.8

  My apologies for sending this so late.  I've been fairly absent as a
  maintainer this cycle, but I did queue these up weeks ago.  In the
  meantime, Richard was able to handle some other fixes (thanks!) but
  didn't pick these up.

  On the bright side, these are very simple changes that should carry
  little risk.

  Summary:

   - Davinci NAND: fix a long-standing bug in how we clear/prep 4-bit ECC

   - OMAP NAND: an error-handling fix that made it into v4.8-rc1 caused
     error-handling cases in other configurations/code-paths; this fixes
     the fix"

* tag 'for-linus-20160928' of git://git.infradead.org/linux-mtd:
  mtd: nand: davinci: Reinitialize the HW ECC engine in 4bit hwctl
  mtd: nand: omap2: Don't call dma_release_channel() if dma_request_chan() failed
2016-09-28 12:53:08 -07:00
Richard Weinberger
d44154f969 mtd: nand: Provide nand_cleanup() function to free NAND related resources
Provide a nand_cleanup() function to free all nand related resources
without unregistering the mtd device.
This should allow drivers to call mtd_device_unregister() and handle
its return value and still being able to cleanup all nand related
resources.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Daniel Walter <dwalter@sigma-star.at>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2016-09-23 09:35:16 +02:00
Boris Brezillon
ba52b4dd65 mtd: nand: mxc: Test CONFIG_OF instead of CONFIG_OF_MTD
We are about to drop the OF_MTD Kconfig option. Test CONFIG_OF
activation instead of CONFIG_OF_MTD.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2016-09-23 09:35:16 +02:00
Boris Brezillon
fde85cfd2d mtd: nand: Fix nand_command_lp() for 8bits opcodes
8 bits opcodes should be followed by a single address cycle. Make the
2nd address cycle dependent of !nand_opcode_8bits(command).

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2016-09-23 09:35:16 +02:00
Boris Brezillon
4796d86559 mtd: nand: sunxi: Support ECC maximization
Setup the maximum ECC config when NAND_ECC_MAXIMIZE is set.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2016-09-23 09:35:16 +02:00
Boris Brezillon
8bbba48124 mtd: nand: Support maximizing ECC when using software BCH
Add support for ECC maximization when software BCH with
nand_ooblayout_lp_ops layout is used.
Other cases should be handled by the NAND controller driver.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2016-09-23 09:35:16 +02:00
Boris Brezillon
ba78ee00e1 mtd: nand: Add an option to maximize the ECC strength
The generic NAND DT bindings allows one to tweak the ECC strength and
step size to their need. It can be used to lower the ECC strength to
match a bootloader/firmware config, but might also be used to get a better
reliability.

In the latter case, the user might want to use the maximum ECC strength
without having to explicitly calculate the exact value (this value not
only depends on the OOB size, but also on the NAND controller, and can
be tricky to extract).

Add a generic 'nand-ecc-maximize' DT property and the associated
NAND_ECC_MAXIMIZE flag, to let ECC controller drivers select the best
ECC strength and step-size on their own.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Rob Herring <robh@kernel.org>
2016-09-23 09:35:16 +02:00
Sascha Hauer
8283079696 mtd: nand: mxc: Add timing setup for v2 controllers
So far we relied on reset default or the bootloader to configure a
suitable clk rate for the Nand controller. This works but we can
optimize the timing for better performance. This sets the clk rate for
v2 controllers (i.MX25/35) based on the timing mode read from the ONFI
parameter page. This may also enable the symmetric mode (aks EDO mode)
if necessary which reads one word per clock cycle.
Tested on an i.MX25 with a Micron MT29F4G08ABBDAHC attached.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2016-09-23 09:35:16 +02:00
Sascha Hauer
4123ea34aa mtd: nand: mxc: implement onfi get/set features
To be able to support different ONFI timing modes we have to implement
the onfi_set_features and onfi_get_features. Tested on an i.MX25 SoC.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2016-09-23 09:35:16 +02:00
Sascha Hauer
907f45fb99 mtd: nand: sunxi: switch from manual to automated timing config
The NAND framework is now able to select the best NAND timings for us.
All we have to do is implement a ->setup_data_interface() function to
apply those timings and remove the timing selection code from the sunxi
driver.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2016-09-23 09:35:16 +02:00
Boris Brezillon
d8e725dd83 mtd: nand: automate NAND timings selection
The NAND framework provides several helpers to query timing modes supported
by a NAND chip, but this implies that all NAND controller drivers have
to implement the same timings selection dance. Also currently NAND
devices can be resetted at arbitrary places which also resets the timing
for ONFI chips to timing mode 0.

Provide a common logic to select the best timings based on ONFI or
->onfi_timing_mode_default information. Hook this into nand_reset()
to make sure the new timing is applied each time during a reset.

NAND controller willing to support timings adjustment should just
implement the ->setup_data_interface() method.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2016-09-23 09:35:16 +02:00
Sascha Hauer
6e1f9708db mtd: nand: Expose data interface for ONFI mode 0
The nand layer will need ONFI mode 0 to use it as timing mode
before and right after reset.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2016-09-23 09:35:16 +02:00
Sascha Hauer
b88730ada9 mtd: nand: Add function to convert ONFI mode to data_interface
onfi_init_data_interface() initializes a data interface with
values from a given ONFI mode.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2016-09-23 09:35:16 +02:00
Sascha Hauer
b1dd3ca203 mtd: nand: convert ONFI mode into data interface
struct nand_data_interface is the designated type to pass to
the NAND drivers to configure the timing. To simplify further
patches convert the onfi_sdr_timings array from type struct
nand_sdr_timings nand_data_interface.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2016-09-23 09:35:16 +02:00
Sascha Hauer
2f94abfe35 mtd: nand: Create a NAND reset function
When NAND devices are resetted some initialization may have to be done,
like for example they have to be configured for the timing mode that
shall be used. To get a common place where this initialization can be
implemented create a nand_reset() function. This currently only issues
a NAND_CMD_RESET to the NAND device. The places issuing this command
manually are replaced with a call to nand_reset().

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2016-09-23 09:35:16 +02:00
Roger Quadros
e13f880b90 mtd: nand: Allow MTD_NAND_OMAP2 to be usable on Keystone devices
Some Keystone devices (e.g. K2G) include a OMAP NAND IP.
Allow the NAND driver to be usable for both
Keystone and OMAP devices.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2016-09-23 09:35:16 +02:00
Ray Jui
eab7fdc7bb mtd: brcmnand: iProc big endian and ONFI support
This patch adds big endian and ONFI support for various iProc based
SoCs that use the core brcmstb NAND controller

This patch was originally implemented by Prafulla Kota
<prafulla.kota@broadcom.com> and fully tested on iProc based NS2 SVK

Signed-off-by: Prafulla Kota <prafulla.kota@broadcom.com>
Signed-off-by: Ray Jui <ray.jui@broadcom.com>
Reviewed-by: Kamal Dasu <kdasu.kdev@gmail.com>
Acked-by: Kamal Dasu <kdasu.kdev@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2016-09-23 09:35:16 +02:00
Kyle Roeschley
10ffd570f1 mtd: nand_bbt: scan for next free bbt block if writing bbt fails
If erasing or writing the BBT fails, we should mark the current BBT
block as bad and use the BBT descriptor to scan for the next available
unused block in the BBT. We should only return a failure if there isn't
any space left.

Signed-off-by: Kyle Roeschley <kyle.roeschley@ni.com>
Suggested-by: Jeff Westfahl <jeff.westfahl@ni.com>
Tested-by: Kyle Roeschley <kyle.roeschley@ni.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2016-09-23 09:35:16 +02:00
Boris Brezillon
c3baf278d3 mtd: nand_bbt: Move BBT block selection logic out of write_bbt()
This clarifies the write_bbt() function by removing the write label
and simplifying the error/exit path.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Tested-by: Kyle Roeschley <kyle.roeschley@ni.com>
2016-09-23 09:35:16 +02:00