Commit Graph

6005 Commits

Author SHA1 Message Date
Colin Ian King d4ed3b9015 mtd: nand: make nand_ooblayout_lp_hamming_ops static
nand_ooblayout_lp_hamming_ops can be made static as it does not need to be
in global scope.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-05-22 09:42:29 +02:00
Marc Gonzalez 60cf0ce14b mtd: nand: tango: Update ecc_stats.corrected
According to Boris, some user-space tools expect MTD drivers to
update ecc_stats.corrected, and it's better to provide a lower
bound than to provide no information at all.

Fixes: 6956e2385a ("mtd: nand: add tango NAND flash controller support")
Cc: stable@vger.kernel.org
Reported-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-05-22 09:42:29 +02:00
Andres Galacho 2761b4f12b mtd: nand: tango: Export OF device ID table as module aliases
The device table is required to load modules based on
modaliases. After adding MODULE_DEVICE_TABLE, below entries
for example will be added to module.alias:
alias:          of:N*T*Csigma,smp8758-nandC*
alias:          of:N*T*Csigma,smp8758-nand

Fixes: 6956e2385a ("mtd: nand: add tango NAND flash controller support")
Cc: stable@vger.kernel.org
Signed-off-by: Andres Galacho <andresgalacho@gmail.com>
Acked-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-05-22 09:42:29 +02:00
Brian Norris d241979074 mtd: nand: samsung: warn about un-parseable ECC info
We don't handle cases larger than 7. We probably shouldn't pretend we
know the ECC step size in this case, and it's probably also good to
WARN() like we do in many other similar cases.

Fixes: 8fc82d456e ("mtd: nand: samsung: Retrieve ECC requirements from extended ID")
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-05-22 09:42:29 +02:00
Brian Norris 7877104929 mtd: nand: free vendor-specific resources in init failure paths
If we fail any time after calling nand_detect(), then we don't call the
vendor-specific ->cleanup() callback, and we'll leak any resources the
vendor-specific code might have allocated.

Mark the "fix" against the first commit that started allocating anything
in ->init().

Fixes: 626994e074 ("mtd: nand: hynix: Add read-retry support for 1x nm MLC NANDs")
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-05-22 09:42:29 +02:00
Brian Norris 0545c17202 mtd: nand: drop unneeded module.h include
nand_ids isn't a separate module anymore and doesn't need this header.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-05-22 09:42:29 +02:00
Brian Norris 44d4182e23 mtd: nand: don't leak buffers when ->scan_bbt() fails
This bug seems to have been here forever, although we came close to
fixing all of them in [1]!

[1] 11eaf6df1c ("mtd: nand: Remove BUG() abuse in nand_scan_tail")

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-05-22 09:42:29 +02:00
Linus Torvalds b53c4d5eb7 This pull request contains updates for both UBI and UBIFS:
- New config option CONFIG_UBIFS_FS_SECURITY
 - Minor improvements
 - Random fixes
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2
 
 iQIcBAABAgAGBQJZFuwKAAoJEEtJtSqsAOnWYrUP/0/y7PEh0ZGdi4kkQy/CnuJr
 pmybsQ0TbLoljahuDXqShKkMNvuXIvKSKcHROIsXreG+DCfC3v/srZlvRt7UCPOE
 QVvjh0sQTaMUrfcaTTM9g3Im/BZX9MueTaSF2Rgx1lF+R2t3InW1bv9hvmQxfoEA
 N75tJgH69mii5pDWuGgLLjmmxhbSkMGpM31QeO5DUaLRqdXcc5L5iK5Hnd+Wtj81
 oSB5RsergCfk17jaWH2e7G03LB2tm6AhM5oksTOpZ9+OIW9GOiUMfjYFC2ZYRwzx
 zHhnh0rGPfFv0jO5u4CXtWaQDfxyw6Z7XLK+Xo1RemkhM/7AQl2xetfIVDXErgoA
 NxxN/a8MWcEpJ2x6y/Z8740HXjyQjt9h3nHzlVPNP8hz68J796E7UzRjCQtf7Iyh
 xqhfjMabxfBqcLkTESvgmjcuwo1IkqOaFBjIw2Cd2nfBEkCKzoaINjRHitgUGj/z
 Mm1CJNWvaK6QTdZ3iCETCyPQI02A+4ZXhDf/QZS3wRAMc1v45pS/dVeBn+0F8Nrc
 ASiQwcd7u1IfJa3A6d6DgMECUWBXjc1GGMfMyhS/ta56pOfe1RyR3bg9WuISqUMe
 86id9tiSs7cP2UVFTrFFFWAO3rATj+9cOO9f2LTujPzcd88cJhKSykaLPmELfyE9
 YUPw9lpExwyXLn7S46LQ
 =9ZJe
 -----END PGP SIGNATURE-----

Merge tag 'upstream-4.12-rc1' of git://git.infradead.org/linux-ubifs

Pull UBI/UBIFS updates from Richard Weinberger:

 - new config option CONFIG_UBIFS_FS_SECURITY

 - minor improvements

 - random fixes

* tag 'upstream-4.12-rc1' of git://git.infradead.org/linux-ubifs:
  ubi: Add debugfs file for tracking PEB state
  ubifs: Fix a typo in comment of ioctl2ubifs & ubifs2ioctl
  ubifs: Remove unnecessary assignment
  ubifs: Fix cut and paste error on sb type comparisons
  ubi: fastmap: Fix slab corruption
  ubifs: Add CONFIG_UBIFS_FS_SECURITY to disable/enable security labels
  ubi: Make mtd parameter readable
  ubi: Fix section mismatch
2017-05-13 10:23:12 -07:00
Linus Torvalds 9786e34e0a MTD updates for 4.12-rc1:
NAND, from Boris:
 """
  - some minor fixes/improvements on existing drivers (fsmc, gpio, ifc,
    davinci, brcmnand, omap)
  - a huge cleanup/rework of the denali driver accompanied with core
    fixes/improvements to simplify the driver code
  - a complete rewrite of the atmel driver to support new DT bindings
    make future evolution easier
  - the addition of per-vendor detection/initialization steps to avoid
    extending the nand_ids table with more extended-id entries
 """
 
 SPI NOR, from Cyrille:
 """
 - fixes in the hisi SPI controller driver.
 - fixes in the intel SPI controller driver.
 - fixes in the Mediatek SPI controller driver.
 - fixes to some SPI flash memories not supported the Chip Erase command.
 - add support to some new memory parts (Winbond, Macronix, Micron, ESMT).
 - add new driver for the STM32 QSPI controller.
 """
 
 And a few fixes for Gemini and Versatile platforms on physmap-of
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJZE86yAAoJEFySrpd9RFgtlOoP/1o1s8dlKdd4TazdoxBTL2wy
 C4wPkqPWyfREcD5ZUYJgr6ENI2OnEwcAxAt2CXnqegx+ZIPToBW4/WK9gj/TNLRx
 AfSOz+EPPzo5uZwJPnfocgIFYuhsspymvmISwv66kPbjfkrSjo1l/K9nem3gh7an
 IkQdVVq8brvxNeDZOAzbsT2Y5DZNfs00g1jLXkcQrpfM0sWKcbHIUa0BTWy4WKGV
 ElTr+xh7QHh/Pd9/A5znd3xX54w5+YR/xe38jSBfTb0vEgw/RIfhIcnvxQ8G/7Se
 jE0+8GR5ZJGKwA9Xk5nFzS2G3uECMFNS75KfxkZ0LlEE6ivUvpDbokCbIU4bDOCt
 /8bWQf9AGA3gLHGgNUQTSt5HrkBXTGp917jtAZbI/y2MzTkLw3aAZ/m/j37vv9ON
 ezeGRO6VWK3bcimLFrt6KO5emYstmm4Tp4rRe3jakH7eyTlINDsecKtuMo2xVzyZ
 kK3tnDMdEntECAiKh3ndRdAUL3fs+/IdzWTAxnF9VQFQs1YxiZ1K8kY/zcN+rzbn
 CVkEhdm+tdDBx8XgOdfnOTGRAJ07dGOoDhLPR4/egC/ta6GIRkHQjFSwsW7bD9p9
 phHH6nQX9Bpza1JV/xvljezoHjvZkny4UhRpLgYMowb41DXv7os7ZV+g7kf5sd0i
 mGzCH46j0DmWQ1u5/Q6j
 =dxj5
 -----END PGP SIGNATURE-----

Merge tag 'for-linus-20170510' of git://git.infradead.org/linux-mtd

Pull MTD updates from Brian Norris:
 "NAND, from Boris:
   - some minor fixes/improvements on existing drivers (fsmc, gpio, ifc,
     davinci, brcmnand, omap)
   - a huge cleanup/rework of the denali driver accompanied with core
     fixes/improvements to simplify the driver code
   - a complete rewrite of the atmel driver to support new DT bindings
     make future evolution easier
   - the addition of per-vendor detection/initialization steps to avoid
     extending the nand_ids table with more extended-id entries

  SPI NOR, from Cyrille:
   - fixes in the hisi, intel and Mediatek SPI controller drivers
   - fixes to some SPI flash memories not supporting the Chip Erase
     command.
   - add support to some new memory parts (Winbond, Macronix, Micron,
     ESMT).
   - add new driver for the STM32 QSPI controller

  And a few fixes for Gemini and Versatile platforms on physmap-of"

* tag 'for-linus-20170510' of git://git.infradead.org/linux-mtd: (100 commits)
  MAINTAINERS: Update NAND subsystem git repositories
  mtd: nand: gpio: update binding
  mtd: nand: add ooblayout for old hamming layout
  mtd: oxnas_nand: Allocating more than necessary in probe()
  dt-bindings: mtd: Document the STM32 QSPI bindings
  mtd: mtk-nor: set controller's address width according to nor flash
  mtd: spi-nor: add driver for STM32 quad spi flash controller
  mtd: nand: brcmnand: Check flash #WP pin status before nand erase/program
  mtd: nand: davinci: add comment on NAND subpage write status on keystone
  mtd: nand: omap2: Fix partition creation via cmdline mtdparts
  mtd: nand: NULL terminate a of_device_id table
  mtd: nand: Fix a couple error codes
  mtd: nand: allow drivers to request minimum alignment for passed buffer
  mtd: nand: allocate aligned buffers if NAND_OWN_BUFFERS is unset
  mtd: nand: denali: allow to override revision number
  mtd: nand: denali_dt: use pdev instead of ofdev for platform_device
  mtd: nand: denali_dt: remove dma-mask DT property
  mtd: nand: denali: support 64bit capable DMA engine
  mtd: nand: denali_dt: enable HW_ECC_FIXUP for Altera SOCFPGA variant
  mtd: nand: denali: support HW_ECC_FIXUP capability
  ...
2017-05-11 10:44:22 -07:00
Vlastimil Babka dcbe82149c mtd: nand: nandsim: convert to memalloc_noreclaim_*()
Nandsim has own functions set_memalloc() and clear_memalloc() for robust
setting and clearing of PF_MEMALLOC.  Replace them by the new generic
helpers.  No functional change.

Link: http://lkml.kernel.org/r/20170405074700.29871-5-vbabka@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Chris Leech <cleech@redhat.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Josef Bacik <jbacik@fb.com>
Cc: Lee Duncan <lduncan@suse.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-05-08 17:15:15 -07:00
Ben Shelton 7bccd12d27 ubi: Add debugfs file for tracking PEB state
Add a file under debugfs to allow easy access to the erase count for
each physical erase block on an UBI device.  This is useful when
debugging data integrity issues with UBIFS on NAND flash devices.

Signed-off-by: Ben Shelton <ben.shelton@ni.com>
Signed-off-by: Zach Brown <zach.brown@ni.com>

v2:
* If ubi_io_is_bad eraseblk_count_seq_show just returns the err.
* if ubi->lookuptbl returns null, its no longer treated as an error
  instead info for that block is not printeded
* Removed check for UBI_MAX_ERASECOUNTER since it is impossible to hit
* Removed block state from print, if a block is printed then it is good and
  if it is not printed, then it is bad.

v3:
* Remove errant ! symbol from if statement checking if erase count is valid.
Signed-off-by: Richard Weinberger <richard@nod.at>
2017-05-08 20:49:02 +02:00
Rabin Vincent 8a1435880f ubi: fastmap: Fix slab corruption
Booting with UBI fastmap and SLUB debugging enabled results in the
following splats.  The problem is that ubi_scan_fastmap() moves the
fastmap blocks from the scan_ai (allocated in scan_fast()) to the ai
allocated in ubi_attach().  This results in two problems:

 - When the scan_ai is freed, aebs which were allocated from its slab
   cache are still in use.

 - When the other ai is being destroyed in destroy_ai(), the
   arguments to kmem_cache_free() call are incorrect since aebs on its
   ->fastmap list were allocated with a slab cache from a differnt ai.

Fix this by making a copy of the aebs in ubi_scan_fastmap() instead of
moving them.

 =============================================================================
 BUG ubi_aeb_slab_cache (Not tainted): Objects remaining in ubi_aeb_slab_cache on __kmem_cache_shutdown()
 -----------------------------------------------------------------------------

 INFO: Slab 0xbfd2da3c objects=17 used=1 fp=0xb33d7748 flags=0x40000080
 CPU: 1 PID: 118 Comm: ubiattach Tainted: G    B           4.9.15 #3
 [<80111910>] (unwind_backtrace) from [<8010d498>] (show_stack+0x18/0x1c)
 [<8010d498>] (show_stack) from [<804a3274>] (dump_stack+0xb4/0xe0)
 [<804a3274>] (dump_stack) from [<8026c47c>] (slab_err+0x78/0x88)
 [<8026c47c>] (slab_err) from [<802735bc>] (__kmem_cache_shutdown+0x180/0x3e0)
 [<802735bc>] (__kmem_cache_shutdown) from [<8024e13c>] (shutdown_cache+0x1c/0x60)
 [<8024e13c>] (shutdown_cache) from [<8024ed64>] (kmem_cache_destroy+0x19c/0x20c)
 [<8024ed64>] (kmem_cache_destroy) from [<8057cc14>] (destroy_ai+0x1dc/0x1e8)
 [<8057cc14>] (destroy_ai) from [<8057f04c>] (ubi_attach+0x3f4/0x450)
 [<8057f04c>] (ubi_attach) from [<8056fe70>] (ubi_attach_mtd_dev+0x60c/0xff8)
 [<8056fe70>] (ubi_attach_mtd_dev) from [<80571d78>] (ctrl_cdev_ioctl+0x110/0x2b8)
 [<80571d78>] (ctrl_cdev_ioctl) from [<8029c77c>] (do_vfs_ioctl+0xac/0xa00)
 [<8029c77c>] (do_vfs_ioctl) from [<8029d10c>] (SyS_ioctl+0x3c/0x64)
 [<8029d10c>] (SyS_ioctl) from [<80108860>] (ret_fast_syscall+0x0/0x1c)
 INFO: Object 0xb33d7e88 @offset=3720
 INFO: Allocated in scan_peb+0x608/0x81c age=72 cpu=1 pid=118
 	kmem_cache_alloc+0x3b0/0x43c
 	scan_peb+0x608/0x81c
 	ubi_attach+0x124/0x450
 	ubi_attach_mtd_dev+0x60c/0xff8
 	ctrl_cdev_ioctl+0x110/0x2b8
 	do_vfs_ioctl+0xac/0xa00
 	SyS_ioctl+0x3c/0x64
 	ret_fast_syscall+0x0/0x1c
 kmem_cache_destroy ubi_aeb_slab_cache: Slab cache still has objects
 CPU: 1 PID: 118 Comm: ubiattach Tainted: G    B           4.9.15 #3
 [<80111910>] (unwind_backtrace) from [<8010d498>] (show_stack+0x18/0x1c)
 [<8010d498>] (show_stack) from [<804a3274>] (dump_stack+0xb4/0xe0)
 [<804a3274>] (dump_stack) from [<8024ed80>] (kmem_cache_destroy+0x1b8/0x20c)
 [<8024ed80>] (kmem_cache_destroy) from [<8057cc14>] (destroy_ai+0x1dc/0x1e8)
 [<8057cc14>] (destroy_ai) from [<8057f04c>] (ubi_attach+0x3f4/0x450)
 [<8057f04c>] (ubi_attach) from [<8056fe70>] (ubi_attach_mtd_dev+0x60c/0xff8)
 [<8056fe70>] (ubi_attach_mtd_dev) from [<80571d78>] (ctrl_cdev_ioctl+0x110/0x2b8)
 [<80571d78>] (ctrl_cdev_ioctl) from [<8029c77c>] (do_vfs_ioctl+0xac/0xa00)
 [<8029c77c>] (do_vfs_ioctl) from [<8029d10c>] (SyS_ioctl+0x3c/0x64)
 [<8029d10c>] (SyS_ioctl) from [<80108860>] (ret_fast_syscall+0x0/0x1c)
 cache_from_obj: Wrong slab cache. ubi_aeb_slab_cache but object is from ubi_aeb_slab_cache
 ------------[ cut here ]------------
 WARNING: CPU: 1 PID: 118 at mm/slab.h:354 kmem_cache_free+0x39c/0x450
 Modules linked in:
 CPU: 1 PID: 118 Comm: ubiattach Tainted: G    B           4.9.15 #3
 [<80111910>] (unwind_backtrace) from [<8010d498>] (show_stack+0x18/0x1c)
 [<8010d498>] (show_stack) from [<804a3274>] (dump_stack+0xb4/0xe0)
 [<804a3274>] (dump_stack) from [<80120e40>] (__warn+0xf4/0x10c)
 [<80120e40>] (__warn) from [<80120f20>] (warn_slowpath_null+0x28/0x30)
 [<80120f20>] (warn_slowpath_null) from [<80271fe0>] (kmem_cache_free+0x39c/0x450)
 [<80271fe0>] (kmem_cache_free) from [<8057cb88>] (destroy_ai+0x150/0x1e8)
 [<8057cb88>] (destroy_ai) from [<8057ef1c>] (ubi_attach+0x2c4/0x450)
 [<8057ef1c>] (ubi_attach) from [<8056fe70>] (ubi_attach_mtd_dev+0x60c/0xff8)
 [<8056fe70>] (ubi_attach_mtd_dev) from [<80571d78>] (ctrl_cdev_ioctl+0x110/0x2b8)
 [<80571d78>] (ctrl_cdev_ioctl) from [<8029c77c>] (do_vfs_ioctl+0xac/0xa00)
 [<8029c77c>] (do_vfs_ioctl) from [<8029d10c>] (SyS_ioctl+0x3c/0x64)
 [<8029d10c>] (SyS_ioctl) from [<80108860>] (ret_fast_syscall+0x0/0x1c)
 ---[ end trace 2bd8396277fd0a0b ]---
 =============================================================================
 BUG ubi_aeb_slab_cache (Tainted: G    B   W      ): page slab pointer corrupt.
 -----------------------------------------------------------------------------

 INFO: Allocated in scan_peb+0x608/0x81c age=104 cpu=1 pid=118
 	kmem_cache_alloc+0x3b0/0x43c
 	scan_peb+0x608/0x81c
 	ubi_attach+0x124/0x450
 	ubi_attach_mtd_dev+0x60c/0xff8
 	ctrl_cdev_ioctl+0x110/0x2b8
 	do_vfs_ioctl+0xac/0xa00
 	SyS_ioctl+0x3c/0x64
 	ret_fast_syscall+0x0/0x1c
 INFO: Slab 0xbfd2da3c objects=17 used=1 fp=0xb33d7748 flags=0x40000081
 INFO: Object 0xb33d7e88 @offset=3720 fp=0xb33d7da0

 Redzone b33d7e80: cc cc cc cc cc cc cc cc                          ........
 Object b33d7e88: 02 00 00 00 01 00 00 00 00 f0 ff 7f ff ff ff ff  ................
 Object b33d7e98: 00 00 00 00 00 00 00 00 bd 16 00 00 00 00 00 00  ................
 Object b33d7ea8: 00 01 00 00 00 02 00 00 00 00 00 00 00 00 00 00  ................
 Redzone b33d7eb8: cc cc cc cc                                      ....
 Padding b33d7f60: 5a 5a 5a 5a 5a 5a 5a 5a                          ZZZZZZZZ
 CPU: 1 PID: 118 Comm: ubiattach Tainted: G    B   W       4.9.15 #3
 [<80111910>] (unwind_backtrace) from [<8010d498>] (show_stack+0x18/0x1c)
 [<8010d498>] (show_stack) from [<804a3274>] (dump_stack+0xb4/0xe0)
 [<804a3274>] (dump_stack) from [<80271770>] (free_debug_processing+0x320/0x3c4)
 [<80271770>] (free_debug_processing) from [<80271ad0>] (__slab_free+0x2bc/0x430)
 [<80271ad0>] (__slab_free) from [<80272024>] (kmem_cache_free+0x3e0/0x450)
 [<80272024>] (kmem_cache_free) from [<8057cb88>] (destroy_ai+0x150/0x1e8)
 [<8057cb88>] (destroy_ai) from [<8057ef1c>] (ubi_attach+0x2c4/0x450)
 [<8057ef1c>] (ubi_attach) from [<8056fe70>] (ubi_attach_mtd_dev+0x60c/0xff8)
 [<8056fe70>] (ubi_attach_mtd_dev) from [<80571d78>] (ctrl_cdev_ioctl+0x110/0x2b8)
 [<80571d78>] (ctrl_cdev_ioctl) from [<8029c77c>] (do_vfs_ioctl+0xac/0xa00)
 [<8029c77c>] (do_vfs_ioctl) from [<8029d10c>] (SyS_ioctl+0x3c/0x64)
 [<8029d10c>] (SyS_ioctl) from [<80108860>] (ret_fast_syscall+0x0/0x1c)
 FIX ubi_aeb_slab_cache: Object at 0xb33d7e88 not freed

Signed-off-by: Rabin Vincent <rabinv@axis.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2017-05-08 20:48:33 +02:00
Andy Shevchenko 997d30cb74 ubi: Make mtd parameter readable
Fix permissions to allow read mtd parameter back (only for owner).

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2017-05-08 20:48:17 +02:00
Andy Shevchenko 435009d406 ubi: Fix section mismatch
WARNING: vmlinux.o(.text+0x1f2a80): Section mismatch in reference from the variable __param_ops_mtd to the function .init.text:ubi_mtd_param_parse()
The function __param_ops_mtd() references
the function __init ubi_mtd_param_parse().
This is often because __param_ops_mtd lacks a __init
annotation or the annotation of ubi_mtd_param_parse is wrong.

Cc: Richard Weinberger <richard@nod.at>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2017-05-08 20:47:59 +02:00
Linus Torvalds 044f1daaaa Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block fixes and updates from Jens Axboe:
 "Some fixes and followup features/changes that should go in, in this
  merge window. This contains:

   - Two fixes for lightnvm from Javier, fixing problems in the new code
     merge previously in this merge window.

   - A fix from Jan for the backing device changes, fixing an issue in
     NFS that causes a failure to mount on certain setups.

   - A change from Christoph, cleaning up the blk-mq init and exit
     request paths.

   - Remove elevator_change(), which is now unused. From Bart.

   - A fix for queue operation invocation on a dead queue, from Bart.

   - A series fixing up mtip32xx for blk-mq scheduling, removing a
     bandaid we previously had in place for this. From me.

   - A regression fix for this series, fixing a case where we wait on
     workqueue flushing from an invalid (non-blocking) context. From me.

   - A fix/optimization from Ming, ensuring that we don't both quiesce
     and freeze a queue at the same time.

   - A fix from Peter on lock ordering for CPU hotplug. Not a real
     problem right now, but will be once the CPU hotplug rework goes in.

   - A series from Omar, cleaning up out blk-mq debugfs support, and
     adding support for exporting info from schedulers in debugfs as
     well. This is really useful in debugging stalls or livelocks. From
     Omar"

* 'for-linus' of git://git.kernel.dk/linux-block: (28 commits)
  mq-deadline: add debugfs attributes
  kyber: add debugfs attributes
  blk-mq-debugfs: allow schedulers to register debugfs attributes
  blk-mq: untangle debugfs and sysfs
  blk-mq: move debugfs declarations to a separate header file
  blk-mq: Do not invoke queue operations on a dead queue
  blk-mq-debugfs: get rid of a bunch of boilerplate
  blk-mq-debugfs: rename hw queue directories from <n> to hctx<n>
  blk-mq-debugfs: don't open code strstrip()
  blk-mq-debugfs: error on long write to queue "state" file
  blk-mq-debugfs: clean up flag definitions
  blk-mq-debugfs: separate flags with |
  nfs: Fix bdi handling for cloned superblocks
  block/mq: Cure cpu hotplug lock inversion
  lightnvm: fix bad back free on error path
  lightnvm: create cmd before allocating request
  blk-mq: don't use sync workqueue flushing from drivers
  mtip32xx: convert internal commands to regular block infrastructure
  mtip32xx: cleanup internal tag assumptions
  block: don't call blk_mq_quiesce_queue() after queue is frozen
  ...
2017-05-06 11:25:08 -07:00
Linus Torvalds af82455f7d char/misc patches for 4.12-rc1
Here is the big set of new char/misc driver drivers and features for
 4.12-rc1.
 
 There's lots of new drivers added this time around, new firmware drivers
 from Google, more auxdisplay drivers, extcon drivers, fpga drivers, and
 a bunch of other driver updates.  Nothing major, except if you happen to
 have the hardware for these drivers, and then you will be happy :)
 
 All of these have been in linux-next for a while with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 -----BEGIN PGP SIGNATURE-----
 
 iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCWQvAgg8cZ3JlZ0Brcm9h
 aC5jb20ACgkQMUfUDdst+yknsACgzkAeyz16Z97J3UTaeejbR7nKUCAAoKY4WEHY
 8O9f9pr9gj8GMBwxeZQa
 =OIfB
 -----END PGP SIGNATURE-----

Merge tag 'char-misc-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver updates from Greg KH:
 "Here is the big set of new char/misc driver drivers and features for
  4.12-rc1.

  There's lots of new drivers added this time around, new firmware
  drivers from Google, more auxdisplay drivers, extcon drivers, fpga
  drivers, and a bunch of other driver updates. Nothing major, except if
  you happen to have the hardware for these drivers, and then you will
  be happy :)

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (136 commits)
  firmware: google memconsole: Fix return value check in platform_memconsole_init()
  firmware: Google VPD: Fix return value check in vpd_platform_init()
  goldfish_pipe: fix build warning about using too much stack.
  goldfish_pipe: An implementation of more parallel pipe
  fpga fr br: update supported version numbers
  fpga: region: release FPGA region reference in error path
  fpga altera-hps2fpga: disable/unprepare clock on error in alt_fpga_bridge_probe()
  mei: drop the TODO from samples
  firmware: Google VPD sysfs driver
  firmware: Google VPD: import lib_vpd source files
  misc: lkdtm: Add volatile to intentional NULL pointer reference
  eeprom: idt_89hpesx: Add OF device ID table
  misc: ds1682: Add OF device ID table
  misc: tsl2550: Add OF device ID table
  w1: Remove unneeded use of assert() and remove w1_log.h
  w1: Use kernel common min() implementation
  uio_mf624: Align memory regions to page size and set correct offsets
  uio_mf624: Refactor memory info initialization
  uio: Allow handling of non page-aligned memory regions
  hangcheck-timer: Fix typo in comment
  ...
2017-05-04 19:15:35 -07:00
Linus Torvalds 89c9fea3c8 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Pull trivial tree updates from Jiri Kosina.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial:
  tty: fix comment for __tty_alloc_driver()
  init/main: properly align the multi-line comment
  init/main: Fix double "the" in comment
  Fix dead URLs to ftp.kernel.org
  drivers: Clean up duplicated email address
  treewide: Fix typo in xml/driver-api/basics.xml
  tools/testing/selftests/powerpc: remove redundant CFLAGS in Makefile: "-Wall -O2 -Wall" -> "-O2 -Wall"
  selftests/timers: Spelling s/privledges/privileges/
  HID: picoLCD: Spelling s/REPORT_WRTIE_MEMORY/REPORT_WRITE_MEMORY/
  net: phy: dp83848: Fix Typo
  UBI: Fix typos
  Documentation: ftrace.txt: Correct nice value of 120 priority
  net: fec: Fix typo in error msg and comment
  treewide: Fix typos in printk
2017-05-02 19:09:35 -07:00
Alexander Couzens 6a623e0769 mtd: nand: add ooblayout for old hamming layout
The old 1-bit hamming layout requires ECC data to be placed at a
fixed offset, and not necessarily at the end of the OOB area.
Add this old layout back in order to fix legacy setups.

Fixes: 41b207a70d ("mtd: nand: implement the default mtd_ooblayout_ops")
Cc: <stable@vger.kernel.org>
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2017-05-02 18:56:39 -07:00
Dan Carpenter b98e1995e4 mtd: oxnas_nand: Allocating more than necessary in probe()
We only need to allocate sizeof(struct oxnas_nand_ctrl) which is 192
bytes and not sizeof(struct nand_chip) which is a much larger 3056
bytes.

Fixes: 6685924924 ("mtd: nand: Add OX820 NAND Support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2017-05-02 15:54:49 -07:00
Christoph Hellwig d6296d39e9 blk-mq: update ->init_request and ->exit_request prototypes
Remove the request_idx parameter, which can't be used safely now that we
support I/O schedulers with blk-mq.  Except for a superflous check in
mtip32xx it was unused anyway.

Also pass the tag_set instead of just the driver data - this allows drivers
to avoid some code duplication in a follow on cleanup.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
2017-05-02 07:52:08 -06:00
Brian Norris 47228ca57e This pull request contains the following notable changes:
- fixes in the hisi SPI controller driver.
 - fixes in the intel SPI controller driver.
 - fixes in the Mediatek SPI controller driver.
 - fixes to some SPI flash memories not supported the Chip Erase command.
 - add support to some new memory parts (Winbond, Macronix, Micron, ESMT).
 - add new driver for the STM32 QSPI controller.
 -----BEGIN PGP SIGNATURE-----
 
 iQI4BAABCAAiBQJZB0rNGxxjeXJpbGxlLnBpdGNoZW5Ad2VkZXY0dS5mcgAKCRDn
 4OgLHRpJcgJfD/9E85M5voFgatb/bwRllhPJnJNs1H93EhwL2F3FdUptJbis+PTU
 3YZx95wrB+ej+IMxM0AeSWlnGmkxcL8lBZbmzK/5lHTcR7f5RUCGZVccA0T3oqy9
 7QSktBGloiIBQFxyQguJrQd5RdP0SsvrA9WJwQXwA+sRIaXK/4471SfwXAaNrfxB
 BLeNu1eV6QNPDx4B8XnfGB3mtunPqWhbE8XdqcFpzFXw/RjGkD+dRdxHOyJRqtjP
 olZVkSCfCumhUmaMYRoOobnPcU/HNye1jPhb5hF+rEflZ/qteiZiYiW8A8vOaGi8
 TefV5vHqem3x4PYEp4yWEblG2CykWwOijfZI73Uk3u/49Zb/l5ohJ06A2Gp3gMwR
 hPyYOm8BMQtWkDKY7rCyPTeXcbX5D0aHFszGxnlz+5sHieHJnilnt3Co9lOCPf9T
 oQtUizyFX0bu1VZ4j9XTebYOZPIE8cNWW6O03c7jhn76JvGvk+BR4ScIg9b8AI5X
 +yarzOThqOwikAtOg8YPVjXoJkMmjzII734yKxeWddF3uxA1WkjUf7mJeSnRisck
 frUIpyeA0du4wxp93IRnCoIKeoMMmFnY77yhRclS1NfddFL81VIiArxWjWDSexeU
 GSyNzrZ6b9IduqTktg0YYyzWWrHXuc8psEcOQjV8w7tgpb2j+HUDmdtBJw==
 =A2vo
 -----END PGP SIGNATURE-----

Merge tag 'spi-nor/for-4.12-v2' of git://github.com/spi-nor/linux into MTD

From Cyrille:
"""
This pull request contains the following notable changes:
- fixes in the hisi SPI controller driver.
- fixes in the intel SPI controller driver.
- fixes in the Mediatek SPI controller driver.
- fixes to some SPI flash memories not supported the Chip Erase command.
- add support to some new memory parts (Winbond, Macronix, Micron, ESMT).
- add new driver for the STM32 QSPI controller.
"""
2017-05-01 17:08:10 -07:00
Brian Norris 57e363b8c4 This pull request contains:
- some minor fixes/improvements on existing drivers (fsmc, gpio, ifc,
    davinci, brcmnand, omap)
  - a huge cleanup/rework of the denali driver accompanied with core
    fixes/improvements to simplify the driver code
  - a complete rewrite of the atmel driver to support new DT bindings
    make future evolution easier
  - the addition of per-vendor detection/initialization steps to avoid
    extending the nand_ids table with more extended-id entries
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJY/z7+AAoJEGXtNgF+CLcAQwgP/2yGTkCcRKPfwP2kM1fkAsG2
 9D5JDTdRiIV+jD9gvoDPijSZafea1dti+W34G2/Fc/WqN5XzVMPC0emb6N+bN3Ex
 KdCyj+xaWIbNeZ900FKidtps0/wffDRR5PNVp4sPwuR7fxq2L7NnUZuEHLWyS31K
 KI2neYIbhgKSG70LCM2nQxjJ2jfM7fABhUwgkKMXJ3W3HBFcdB4Zu6wspaCyGdVX
 0tFZcyTZ82VAUlBIjfWP9tfQEhyL5jdXob1STJh0sBTInp1PwWxLHmuq2NBMb6zV
 WEYs/4h7/pBZ+R+S9RdcoBvdATD3BRaRqi1zhEjH99J9ehQ92m0x+8F4mLyvJFuu
 izOXvwFjX0htSXYZkK7cl2hPz8eCXOxU70QeJVnqWBtpnlk3LS1qAKqhwoVRPm7I
 /fVBpIGtWpdpLrIMAWf8M33mH4zB0abd282J38IvC+AD1imhjizJjqGmOPnl3zGK
 k1WnnVAtoOaSGFjeAop3UTBErgC0t/ron493Ef5is9HqThYy8gVxE5K1B8ToNba3
 yDZe4OH2RE/lbirgehHM8sF/+XZKbavqBOIN0Z0tO4qMmSKxlCdvHNaNunMnKVNX
 ED0joblub6NEZsSsZrNiarhZ03SRZmQOHYqunTe/Q4e4Xc0vQEh3FVNUCVJUVOq2
 nh5YWUNehTVe00+fsD1h
 =4jGH
 -----END PGP SIGNATURE-----

Merge tag 'nand/for-4.12' of github.com:linux-nand/linux into MTD

From Boris:
"""
This pull request contains:

 - some minor fixes/improvements on existing drivers (fsmc, gpio, ifc,
   davinci, brcmnand, omap)
 - a huge cleanup/rework of the denali driver accompanied with core
   fixes/improvements to simplify the driver code
 - a complete rewrite of the atmel driver to support new DT bindings
   make future evolution easier
 - the addition of per-vendor detection/initialization steps to avoid
   extending the nand_ids table with more extended-id entries
"""
2017-05-01 13:36:44 -07:00
Linus Torvalds 694752922b Merge branch 'for-4.12/block' of git://git.kernel.dk/linux-block
Pull block layer updates from Jens Axboe:

 - Add BFQ IO scheduler under the new blk-mq scheduling framework. BFQ
   was initially a fork of CFQ, but subsequently changed to implement
   fairness based on B-WF2Q+, a modified variant of WF2Q. BFQ is meant
   to be used on desktop type single drives, providing good fairness.
   From Paolo.

 - Add Kyber IO scheduler. This is a full multiqueue aware scheduler,
   using a scalable token based algorithm that throttles IO based on
   live completion IO stats, similary to blk-wbt. From Omar.

 - A series from Jan, moving users to separately allocated backing
   devices. This continues the work of separating backing device life
   times, solving various problems with hot removal.

 - A series of updates for lightnvm, mostly from Javier. Includes a
   'pblk' target that exposes an open channel SSD as a physical block
   device.

 - A series of fixes and improvements for nbd from Josef.

 - A series from Omar, removing queue sharing between devices on mostly
   legacy drivers. This helps us clean up other bits, if we know that a
   queue only has a single device backing. This has been overdue for
   more than a decade.

 - Fixes for the blk-stats, and improvements to unify the stats and user
   windows. This both improves blk-wbt, and enables other users to
   register a need to receive IO stats for a device. From Omar.

 - blk-throttle improvements from Shaohua. This provides a scalable
   framework for implementing scalable priotization - particularly for
   blk-mq, but applicable to any type of block device. The interface is
   marked experimental for now.

 - Bucketized IO stats for IO polling from Stephen Bates. This improves
   efficiency of polled workloads in the presence of mixed block size
   IO.

 - A few fixes for opal, from Scott.

 - A few pulls for NVMe, including a lot of fixes for NVMe-over-fabrics.
   From a variety of folks, mostly Sagi and James Smart.

 - A series from Bart, improving our exposed info and capabilities from
   the blk-mq debugfs support.

 - A series from Christoph, cleaning up how handle WRITE_ZEROES.

 - A series from Christoph, cleaning up the block layer handling of how
   we track errors in a request. On top of being a nice cleanup, it also
   shrinks the size of struct request a bit.

 - Removal of mg_disk and hd (sorry Linus) by Christoph. The former was
   never used by platforms, and the latter has outlived it's usefulness.

 - Various little bug fixes and cleanups from a wide variety of folks.

* 'for-4.12/block' of git://git.kernel.dk/linux-block: (329 commits)
  block: hide badblocks attribute by default
  blk-mq: unify hctx delay_work and run_work
  block: add kblock_mod_delayed_work_on()
  blk-mq: unify hctx delayed_run_work and run_work
  nbd: fix use after free on module unload
  MAINTAINERS: bfq: Add Paolo as maintainer for the BFQ I/O scheduler
  blk-mq-sched: alloate reserved tags out of normal pool
  mtip32xx: use runtime tag to initialize command header
  scsi: Implement blk_mq_ops.show_rq()
  blk-mq: Add blk_mq_ops.show_rq()
  blk-mq: Show operation, cmd_flags and rq_flags names
  blk-mq: Make blk_flags_show() callers append a newline character
  blk-mq: Move the "state" debugfs attribute one level down
  blk-mq: Unregister debugfs attributes earlier
  blk-mq: Only unregister hctxs for which registration succeeded
  blk-mq-debugfs: Rename functions for registering and unregistering the mq directory
  blk-mq: Let blk_mq_debugfs_register() look up the queue name
  blk-mq: Register <dev>/queue/mq after having registered <dev>/queue
  ide-pm: always pass 0 error to ide_complete_rq in ide_do_devset
  ide-pm: always pass 0 error to __blk_end_request_all
  ..
2017-05-01 10:39:57 -07:00
Guochun Mao 8abe904dc8 mtd: mtk-nor: set controller's address width according to nor flash
When nor's size larger than 16MByte, nor's address width maybe
set to 3 or 4, and controller should change address width according
to nor's setting.

Signed-off-by: Guochun Mao <guochun.mao@mediatek.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
2017-05-01 16:45:40 +02:00
Ludovic Barre 0d43d7ab27 mtd: spi-nor: add driver for STM32 quad spi flash controller
The quadspi is a specialized communication interface targeting single,
dual or quad SPI Flash memories.

It can operate in any of the following modes:
-indirect mode: all the operations are performed using the quadspi
 registers
-read memory-mapped mode: the external Flash memory is mapped to the
 microcontroller address space and is seen by the system as if it was
 an internal memory

Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Reviewed-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
2017-05-01 16:45:32 +02:00
Kamal Dasu 9d2ee0a60b mtd: nand: brcmnand: Check flash #WP pin status before nand erase/program
On brcmnand controller v6.x and v7.x, the #WP pin is controlled through
the NAND_WP bit in CS_SELECT register.

The driver currently assumes that toggling the #WP pin is
instantaneously enabling/disabling write-protection, but it actually
takes some time to propagate the new state to the internal NAND chip
logic. This behavior is sometime causing data corruptions when an
erase/program operation is executed before write-protection has really
been disabled.

Fixes: 27c5b17cd1 ("mtd: nand: add NAND driver "library" for Broadcom STB NAND controller")
Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-25 14:18:42 +02:00
Sekhar Nori 65a2c1caa7 mtd: nand: davinci: add comment on NAND subpage write status on keystone
Add a comment clarifying that NAND subpage write on keystone works,
but is not being enabled in the interest of backward compatibility.

Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-25 14:18:41 +02:00
Roger Quadros 2d283ede59 mtd: nand: omap2: Fix partition creation via cmdline mtdparts
commit c9711ec525 ("mtd: nand: omap: Clean up device tree support")
caused the parent device name to be changed from "omap2-nand.0"
to "<base address>.nand"  (e.g. 30000000.nand on omap3 platforms).
This caused mtd->name to be changed as well. This breaks partition
creation via mtdparts passed by u-boot as it uses "omap2-nand.0"
for the mtd-id.

Fix this by explicitly setting the mtd->name to "omap2-nand.<CS number>"
if it isn't already set by nand_set_flash_node(). CS number is the
NAND controller instance ID.

Fixes: c9711ec525 ("mtd: nand: omap: Clean up device tree support")
Cc: <stable@vger.kernel.org> # 4.7+
Reported-by: Leto Enrico <enrico.leto@siemens.com>
Reported-by: Adam Ford <aford173@gmail.com>
Suggested-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Tested-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-25 14:18:40 +02:00
Christophe Jaillet 038e8ad6eb mtd: nand: NULL terminate a of_device_id table
of_device_id tables should be NULL terminated.

Fixes: 07b23e3db9ed ("mtd: nand: Cleanup/rework the atmel_nand driver")

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-25 14:18:39 +02:00
Dan Carpenter 70106ddaf3 mtd: nand: Fix a couple error codes
We accidentally return 1 on error instead of proper error codes.

Fixes: 07b23e3db9ed ("mtd: nand: Cleanup/rework the atmel_nand driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-25 14:18:39 +02:00
Masahiro Yamada 477544c62a mtd: nand: allow drivers to request minimum alignment for passed buffer
In some cases, nand_do_{read,write}_ops is passed with unaligned
ops->datbuf.  Drivers using DMA will be unhappy about unaligned
buffer.

The new struct member, buf_align, represents the minimum alignment
the driver require for the buffer.  If the buffer passed from the
upper MTD layer does not have enough alignment, nand_do_*_ops will
use bufpoi.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-25 14:18:38 +02:00
Masahiro Yamada 3deb9979c7 mtd: nand: allocate aligned buffers if NAND_OWN_BUFFERS is unset
Some NAND controllers are using DMA engine requiring a specific
buffer alignment.  The core provides no guarantee on the nand_buffers
pointers, which forces some drivers to allocate their own buffers
and pass the NAND_OWN_BUFFERS flag.

Rework the nand_buffers allocation logic to allocate each buffer
independently.  This should make most NAND controllers/DMA engine
happy, and allow us to get rid of these custom buf allocation in
NAND controller drivers.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-25 14:18:37 +02:00
Masahiro Yamada e7beeeec85 mtd: nand: denali: allow to override revision number
Commit 271707b1d8 ("mtd: nand: denali: max_banks calculation
changed in revision 5.1") added a revision check to support the
new max_banks encoding.  Its git-log states "The encoding of
max_banks changed in Denali revision 5.1".

There are exceptional cases, for example, the revision register on
some UniPhier SoCs says the IP is 5.0 but the max_banks is encoded
in the new format.

This IP updates the resister specification from time to time (often
breaking the backward compatibility), but the revision number is not
incremented correctly.

The max_banks is not only the case that needs revision checking.
Let's allow to override an incorrect revision number.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-25 14:18:37 +02:00
Masahiro Yamada 3f5c35819f mtd: nand: denali_dt: use pdev instead of ofdev for platform_device
"pdev" is much more often used to point a platform_device, so this
will help the driver code look consistent across the kernel.

While we are here, fix "line over 80 characters" coding style
violations.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-25 14:18:36 +02:00
Masahiro Yamada 60d920d32c mtd: nand: denali_dt: remove dma-mask DT property
The driver sets appropriate DMA mask.  Delete the "dma-mask" DT
property.  See [1] for negative comments for this binding.

[1] https://lkml.org/lkml/2016/2/8/57

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-25 14:18:36 +02:00
Masahiro Yamada 210a2c876f mtd: nand: denali: support 64bit capable DMA engine
The current driver only supports the DMA engine up to 32 bit
physical address, but there also exists 64 bit capable DMA engine
for this IP.

The data DMA setup sequence is completely different, so I added the
64 bit DMA code as a new function denali_setup_dma64().  The 32 bit
one has been renamed to denali_setup_dma32().

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-25 14:18:35 +02:00
Masahiro Yamada a56609c4c3 mtd: nand: denali_dt: enable HW_ECC_FIXUP for Altera SOCFPGA variant
There are various customizable parameters, so several variants for
this IP.  A generic compatible like "denali,denali-nand-dt" is
useless.  Moreover, there are multiple things wrong with this string.
(Refer to Rob's comment [1])

The "denali,denali-nand-dt" was added by Altera for the SOCFPGA port.
Replace it with a more specific string "altr,socfpga-denali-nand".
There are no users (in upstream) of the old compatible string.

The Denali IP on SOCFPGA incorporates the hardware ECC fixup engine.
So, this capability should be associated with the compatible.

[1] https://lkml.org/lkml/2016/12/1/450

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-25 14:18:34 +02:00
Masahiro Yamada 24715c749b mtd: nand: denali: support HW_ECC_FIXUP capability
Some old versions of the Denali IP (perhaps used only for Intel?)
detects ECC errors and provides correct data via a register, but
does not touch the transferred data.  So, the software must fixup
the data in the buffer according to the provided ECC correction
information.

Newer versions perform ECC correction before transferring the data.
No more software intervention is needed.  The ECC_ERROR_ADDRESS and
ECC_CORRECTION_INFO registers were deprecated.  Instead, the number
of corrected bit-flips are reported via the ECC_COR_INFO register.
When an uncorrectable ECC error happens, a status flag is set to the
INTR_STATUS and ECC_COR_INFO registers.

As is often the case with this IP, the register view of INTR_STATUS
had broken compatibility.

For older versions (SW ECC fixup):
  bit 0:  ECC_TRANSACTION_DONE
  bit 1:  ECC_ERR

For newer versions (HW ECC fixup):
  bit 0:  ECC_UNCOR_ERR
  bit 1:  Reserved

Due to this difference, the irq_mask must be fixed too.

The existing handle_ecc() has been renamed to denali_sw_ecc_fixup()
for clarification.

What is unfortunate with this feature is we can not know the total
number of corrected/uncorrected errors in a page.  The register
ECC_COR_INFO reports the maximum of per-sector bitflips.  This is
useful for ->read_page return value, but ecc_stats.{corrected,failed}
increments may not be precise.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-25 14:18:34 +02:00
Masahiro Yamada d29109be2e mtd: nand: denali: fix erased page checking
This part is wrong in multiple ways:

[1] is_erased() is called against "buf" twice, so the OOB area is
not checked at all.  The second call should check chip->oob_poi.

[2] This code block is nested by double "if (check_erase_page)".
The inner one is redundant.

[3] The ECC_ERROR_ADDRESS register reports which sector(s) had
uncorrectable ECC errors.  It is pointless to check the whole page
if only one sector contains errors.

[4] Unfortunately, the Denali ECC correction engine has already
manipulated the data buffer before it decides the bitflips are
uncorrectable.  That is, not all of the data are 0xFF after an
erased page is processed by the ECC engine.  The current is_erased()
helper could report false-positive ECC errors.  Actually, a certain
mount of bitflips are allowed in an erased page.  The core framework
provides nand_check_erased_ecc_chunk() that takes the threshold into
account.  Let's use this.

This commit reworks the code to solve those problems.

Please note the erased page checking is implemented as a separate
helper function instead of embedding it in the loop in handle_ecc().
The reason is that OOB data are needed for the erased page checking,
but the controller can not start a new transaction until all ECC
error information is read out from the registers.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-25 14:18:33 +02:00
Masahiro Yamada 20d48595f8 mtd: nand: denali: fix bitflips calculation in handle_ecc()
This function is wrong in multiple ways:

[1] Counting corrected bytes instead of corrected bits.

The following code is counting the number of corrected _bytes_.

    /* correct the ECC error */
    buf[offset] ^= err_cor_value;
    mtd->ecc_stats.corrected++;
    bitflips++;

What the core framework expects is the number of corrected _bits_.
They can be different if multiple bitflips occur within one byte.

[2] total number of errors instead of max of per-sector errors

The core framework expects that corrected errors are counted per
sector, then the max value should be taken.  The current code simply
iterates over the whole page, i.e. counts the total number of
correction in the page.  This means "too many bitflips" is triggered
earlier than it should be, i.e. the NAND device is worn out sooner.

Besides those bugs, this function is unreadable due to the deep
nesting.  Notice the whole code in this function is wrapped in
if (irq_status & INTR__ECC_ERR), so this conditional can be moved
out of the function.  Also, use shorter names for local variables.

Re-work the function to fix all the issues.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-25 14:18:33 +02:00
Masahiro Yamada 8927ad394b mtd: nand: denali: remove meaningless pipeline read-ahead operation
The pipeline read-ahead function of the Denali IP enables continuous
reading from the device; while data is being read out by a CPU, the
controller maintains additional commands for streaming data from the
device.  This will reduce the latency of the second page or later.

This feature is obviously no help for per-page accessors of Linux
NAND driver interface.

In the current implementation, the pipeline command is issued to
load a single page, then data are read out immediately.  The use of
the pipeline operation is not adding any advantage, but just adding
complexity to the code.  Remove.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-25 14:18:32 +02:00
Masahiro Yamada 8aabdf376f mtd: nand: denali: allow to override mtd->name from label DT property
Commit 28309572aa ("mtd: name the mtd device with an optional
label property") allow us to identify a chip in a user-friendly way.

If nand_set_flash_node() picks up the "label" from DT, let's respect
it.  Otherwise, let it fallback to the current name "denali-nand".

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Suggested-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-25 14:18:31 +02:00
Masahiro Yamada 07604686e8 mtd: nand: relax ecc.read_page() return value for uncorrectable ECC
The comment for ecc.read_page() requires that it should return
"0 if bitflips uncorrectable".

Actually, drivers could return positive values when uncorrectable
bitflips occur.  For example, nand_read_page_swecc() is the case.
If ecc.correct() returns -EBADMSG for the first ECC sector, and
a positive value for the second one, nand_read_page_swecc() returns
a positive max_bitflips and increments ecc_stats.failed for the same
page.

The requirement can be relaxed by tweaking nand_do_read_ops().
Move the max_bitflips calculation below the retry.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Suggested-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-25 14:18:31 +02:00
Boris Brezillon f107d7a439 mtd: nand: Remove unused chip->write_page() hook
The last/only user of the chip->write_page() hook (the Atmel NAND
controller driver) has been reworked and is no longer specifying a custom
->write_page() implementation.
Drop this hook before someone else start abusing it.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-04-25 14:18:30 +02:00
Boris Brezillon f88fc122cc mtd: nand: Cleanup/rework the atmel_nand driver
This is a complete rewrite of the driver whose main purpose is to
support the new DT representation where the NAND controller node is now
really visible in the DT and appears under the EBI bus. With this new
representation, we can add other devices under the EBI bus without
risking pinmuxing conflicts (the NAND controller is under the EBI
bus logic and as such, share some of its pins with other devices
connected on this bus).

Even though the goal of this rework was not necessarily to add new
features, the new driver has been designed with this in mind. With a
clearer separation between the different blocks and different IP
revisions, adding new functionalities should be easier (we already
have plans to support SMC timing configuration so that we no longer
have to rely on the configuration done by the bootloader/bootstrap).

Also note that we no longer have a custom ->cmdfunc() implementation,
which means we can now benefit from new features added in the core
implementation for free (support for new NAND operations for example).

The last thing that we gain with this rework is support for multi-chips
and multi-dies chips, thanks to the clean NAND controller <-> NAND
devices representation.

During this transition we also dropped support for AVR32 SoCs which
should soon disappear from mainline (removal of the AVR32 arch is
planned for 4.12).

This new driver has been tested on several platforms (at91sam9261,
at91sam9g45, at91sam9x5, sama5d3 and sama5d4) to make sure it did not
introduce regressions, and it's worth mentioning that old bindings are
still supported (which partly explain the positive diffstat).

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
2017-04-25 14:18:29 +02:00
Jan Kara 7c4cc30024 bdi: Drop 'parent' argument from bdi_register[_va]()
Drop 'parent' argument of bdi_register() and bdi_register_va().  It is
always NULL.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-20 12:09:55 -06:00
Jan Kara c1844d536d fs: Remove SB_I_DYNBDI flag
Now that all bdi structures filesystems use are properly refcounted, we
can remove the SB_I_DYNBDI flag.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-20 12:09:55 -06:00
Jan Kara fa06052d63 mtd: Convert to dynamically allocated bdi infrastructure
MTD already allocates backing_dev_info dynamically. Convert it to use
generic infrastructure for this including proper refcounting. We drop
mtd->backing_dev_info as its only use was to pass mtd_bdi pointer from
one file into another and if we wanted to keep that in a clean way, we'd
have to make mtd hold and drop bdi reference as needed which seems
pointless for passing one global pointer...

CC: David Woodhouse <dwmw2@infradead.org>
CC: Brian Norris <computersforpeace@gmail.com>
CC: linux-mtd@lists.infradead.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-20 12:09:55 -06:00
Rafał Miłecki da4b1caa49 mtd: physmap_of: use OF helpers for reading strings
OF core code provides helpers for counting strings and reading them so
use them instead of doing this manually. This simplifies the code a bit.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2017-04-19 15:26:26 -07:00
Geliang Tang e4a8aad8e0 mtd: mtdswap: use MTDSWAP_ECNT_MIN/MAX
Since macros MTDSWAP_ECNT_MIN() and MTDSWAP_ECNT_MAX() have been
defined in mtdswap.c, use them instead of open-coding.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Acked-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2017-04-19 13:12:02 -07:00