Commit graph

76 commits

Author SHA1 Message Date
Ben Dooks
051913dada mmc_block: do not DMA to stack
In the write recovery routine, the data to get from the card
is allocated from the stack. The DMA mapping documentation says
explicitly stack memory is not mappable by any of the DMA calls.

Change to using kmalloc() to allocate the memory for the result
from the card and then free it once we've finished with the
transaction.

[ Changed to GFP_KERNEL allocation - Pierre Ossman ]

Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
2009-06-13 22:43:01 +02:00
Martin K. Petersen
e1defc4ff0 block: Do away with the notion of hardsect_size
Until now we have had a 1:1 mapping between storage device physical
block size and the logical block sized used when addressing the device.
With SATA 4KB drives coming out that will no longer be the case.  The
sector size will be 4KB but the logical block size will remain
512-bytes.  Hence we need to distinguish between the physical block size
and the logical ditto.

This patch renames hardsect_size to logical_block_size.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-05-22 23:22:54 +02:00
Jens Axboe
e4b636366c Merge branch 'master' into for-2.6.31
Conflicts:
	drivers/block/hd.c
	drivers/block/mg_disk.c

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-05-22 20:25:34 +02:00
Tejun Heo
9934c8c045 block: implement and enforce request peek/start/fetch
Till now block layer allowed two separate modes of request execution.
A request is always acquired from the request queue via
elv_next_request().  After that, drivers are free to either dequeue it
or process it without dequeueing.  Dequeue allows elv_next_request()
to return the next request so that multiple requests can be in flight.

Executing requests without dequeueing has its merits mostly in
allowing drivers for simpler devices which can't do sg to deal with
segments only without considering request boundary.  However, the
benefit this brings is dubious and declining while the cost of the API
ambiguity is increasing.  Segment based drivers are usually for very
old or limited devices and as converting to dequeueing model isn't
difficult, it doesn't justify the API overhead it puts on block layer
and its more modern users.

Previous patches converted all block low level drivers to dequeueing
model.  This patch completes the API transition by...

* renaming elv_next_request() to blk_peek_request()

* renaming blkdev_dequeue_request() to blk_start_request()

* adding blk_fetch_request() which is combination of peek and start

* disallowing completion of queued (not started) requests

* applying new API to all LLDs

Renamings are for consistency and to break out of tree code so that
it's apparent that out of tree drivers need updating.

[ Impact: block request issue API cleanup, no functional change ]

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Mike Miller <mike.miller@hp.com>
Cc: unsik Kim <donari75@gmail.com>
Cc: Paul Clements <paul.clements@steeleye.com>
Cc: Tim Waugh <tim@cyberelk.net>
Cc: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Laurent Vivier <Laurent@lvivier.info>
Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Adrian McMenamin <adrian@mcmen.demon.co.uk>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Cc: Borislav Petkov <petkovbb@googlemail.com>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Alex Dubov <oakad@yahoo.com>
Cc: Pierre Ossman <drzeus@drzeus.cx>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Markus Lidel <Markus.Lidel@shadowconnect.com>
Cc: Stefan Weinhuber <wein@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Pete Zaitcev <zaitcev@redhat.com>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-05-11 09:52:18 +02:00
Tejun Heo
296b2f6ae6 block: convert to dequeueing model (easy ones)
plat-omap/mailbox, floppy, viocd, mspro_block, i2o_block and
mmc/card/queue are already pretty close to dequeueing model and can be
converted with simple changes.  Convert them.

While at it,

* xen-blkfront: !fs check moved downwards to share dequeue call with
  normal path.

* mspro_block: __blk_end_request(..., blk_rq_cur_byte()) converted to
  __blk_end_request_cur()

* mmc/card/queue: loop of __blk_end_request() converted to
  __blk_end_request_all()

[ Impact: dequeue in-flight request ]

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Alex Dubov <oakad@yahoo.com>
Cc: Markus Lidel <Markus.Lidel@shadowconnect.com>
Cc: Pierre Ossman <drzeus@drzeus.cx>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-05-11 09:52:17 +02:00
Tejun Heo
83096ebf12 block: convert to pos and nr_sectors accessors
With recent cleanups, there is no place where low level driver
directly manipulates request fields.  This means that the 'hard'
request fields always equal the !hard fields.  Convert all
rq->sectors, nr_sectors and current_nr_sectors references to
accessors.

While at it, drop superflous blk_rq_pos() < 0 test in swim.c.

[ Impact: use pos and nr_sectors accessors ]

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Tested-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Tested-by: Adrian McMenamin <adrian@mcmen.demon.co.uk>
Acked-by: Adrian McMenamin <adrian@mcmen.demon.co.uk>
Acked-by: Mike Miller <mike.miller@hp.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Cc: Borislav Petkov <petkovbb@googlemail.com>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Eric Moore <Eric.Moore@lsi.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Pete Zaitcev <zaitcev@redhat.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Paul Clements <paul.clements@steeleye.com>
Cc: Tim Waugh <tim@cyberelk.net>
Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Alex Dubov <oakad@yahoo.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Dario Ballabio <ballabio_dario@emc.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: unsik Kim <donari75@gmail.com>
Cc: Laurent Vivier <Laurent@lvivier.info>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-05-11 09:50:54 +02:00
Pierre Ossman
548d2de9bd mmc_block: be prepared for oversized requests
The block layer does not support very low sector count restrictions
so we need to be prepared to handle bigger requests than we can send
directly to the controller.

Problem found by Manuel Lauss.

Signed-off-by: Pierre Ossman <pierre@ossman.eu>
2009-05-03 22:11:00 +02:00
Linus Torvalds
0a053e8c71 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc: (42 commits)
  atmel-mci: fix sdc_reg typo
  tmio_mmc: add maintainer
  mmc: Add OpenFirmware bindings for SDHCI driver
  sdhci: Add quirk for forcing maximum block size to 2048 bytes
  sdhci: Add quirk for controllers that need IRQ re-init after reset
  sdhci: Add quirk for controllers that need small delays for PIO
  sdhci: Add set_clock callback and a quirk for nonstandard clocks
  sdhci: Add get_{max,timeout}_clock callbacks
  sdhci: Add support for hosts reporting inverted write-protect state
  sdhci: Add support for card-detection polling
  sdhci: Enable only relevant (DMA/PIO) interrupts during transfers
  sdhci: Split card-detection IRQs management from sdhci_init()
  sdhci: Add support for bus-specific IO memory accessors
  mmc_spi: adjust for delayed data token response
  omap_hsmmc: Wait for SDBP
  omap_hsmmc: Fix MMC3 dma
  omap_hsmmc: Disable SDBP at suspend
  omap_hsmmc: Do not prefix slot name
  omap_hsmmc: Allow cover switch to cause rescan
  omap_hsmmc: Add 8-bit bus width mode support
  ...
2009-04-05 10:18:21 -07:00
Alexey Dobriyan
201a50ba66 proc tty: switch sdio_uart to ->proc_fops
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-01 08:59:09 -07:00
Andy Whitcroft
6b0b62853b mmc: add MODALIAS linkage for MMC/SD devices
Currently we are using an explicit udev rule to trigger loading of the
mmc-block module when an MMC or SD card is detected:

    SUBSYSTEM=="mmc", RUN+="/sbin/modprobe -Qba mmc-block"

It makes much more sense for the mmc bus driver and the mmc-block module to
share MODALIAS information so that they are linked automatically.

There is no real information of use in the MMC system at the current time.
All devices inserted require us to load the mmc-block device.  Until such
time as useful parameters exist simply reflect the module linkage via
the module alias below:

	mmc:block

Signed-off-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2009-03-24 21:29:58 +01:00
Rabin Vincent
58a5dd3e0e mmc_test: fix basic read test
Due to a typo in the Basic Read test, it's currently identical to the
Basic Write test.  Fix this.

Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2009-02-18 21:01:14 +01:00
Yi Li
444122fd58 MMC: fix bug - SDHC card capacity not correct
Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2009-02-18 06:27:33 +01:00
Adrian Hunter
6a79e391df mmc_block: ensure all sectors that do not have errors are read
If a card encounters an ECC error while reading a sector it will
timeout.  Instead of reporting the entire I/O request as having
an error, redo the I/O one sector at a time so that all readable
sectors are provided to the upper layers.

Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-12-31 18:21:17 +01:00
Adrian Hunter
504f191f25 mmc_block: print better error messages
Add command response and card status to error
messages.

Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-12-31 18:18:13 +01:00
Harvey Harrison
b7a03210b7 mmc: trivial annotation of 'blocks'
sg_init_one is reading a be32, annotate as such.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-12-31 18:18:11 +01:00
Al Viro
a5a1561f88 [PATCH] switch mmc
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2008-10-21 07:48:37 -04:00
Al Viro
d4430d62fa [PATCH] beginning of methods conversion
To keep the size of changesets sane we split the switch by drivers;
to keep the damn thing bisectable we do the following:
	1) rename the affected methods, add ones with correct
prototypes, make (few) callers handle both.  That's this changeset.
	2) for each driver convert to new methods.  *ALL* drivers
are converted in this series.
	3) kill the old (renamed) methods.

Note that it _is_ a flagday; all in-tree drivers are converted and by the
end of this series no trace of old methods remain.  The only reason why
we do that this way is to keep the damn thing bisectable and allow per-driver
debugging if anything goes wrong.

New methods:
	open(bdev, mode)
	release(disk, mode)
	ioctl(bdev, mode, cmd, arg)		/* Called without BKL */
	compat_ioctl(bdev, mode, cmd, arg)
	locked_ioctl(bdev, mode, cmd, arg)	/* Called with BKL, legacy */

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2008-10-21 07:47:32 -04:00
Pierre Ossman
8dddfe1926 mmc_block: tell block layer there is no seek penalty
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-10-14 20:04:46 +02:00
Linus Torvalds
46b5e34029 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc: (24 commits)
  MMC: Use timeout values from CSR
  MMC: CSD and CID timeout values
  sdhci: 'scratch' may be used uninitialized
  mmc: explicitly mention SDIO support in Kconfig
  mmc: remove redundant "depends on"
  Fix comment in include/linux/mmc/host.h
  sdio: high-speed support
  mmc_block: hard code 512 byte block size
  sdhci: force high speed capability on some controllers
  mmc_block: filter out PC requests
  mmc_block: indicate strict ordering
  mmc_block: inform block layer about sector count restriction
  sdio: give sdio irq thread a host specific name
  sdio: make sleep on error interruptable
  sdhci: reduce card detection delay
  sdhci: let the controller wait for busy state to end
  atmel-mci: Add missing flush_dcache_page() in PIO transfer code
  atmel-mci: Don't overwrite error bits when NOTBUSY is set
  atmel-mci: Add experimental DMA support
  atmel-mci: support multiple mmc slots
  ...
2008-10-12 11:51:57 -07:00
Pierre Ossman
57105737f6 mmc: explicitly mention SDIO support in Kconfig
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-10-12 11:04:36 +02:00
Pierre Ossman
1ea4f444f3 mmc: remove redundant "depends on"
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-10-12 11:04:35 +02:00
Pierre Ossman
0884669870 mmc_block: hard code 512 byte block size
We use 512 byte blocks on all cards, and newer cards support nothing
else, so hard code it and make the code less complex.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-10-12 11:04:33 +02:00
Pierre Ossman
d6d8de3341 mmc_block: filter out PC requests
We do not support PC (SCSI) commands, so don't pretend we do by
letting them through.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-10-12 11:04:32 +02:00
Pierre Ossman
9102895411 mmc_block: indicate strict ordering
The MMC block driver services requests one at a time and in strict
order. Indicate this to the block layer so that it can handle barriers
in an efficient manner.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-10-12 11:04:31 +02:00
Pierre Ossman
f3eb0aaa02 mmc_block: inform block layer about sector count restriction
Make sure we consider the maximum block count when we tell the block
layer about the maximum sector count. That way we don't have to chop
up the request ourselves.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-10-12 11:04:30 +02:00
Linus Torvalds
ef5bef357c Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (37 commits)
  [SCSI] zfcp: fix double dbf id usage
  [SCSI] zfcp: wait on SCSI work to be finished before proceeding with init dev
  [SCSI] zfcp: fix erp list usage without using locks
  [SCSI] zfcp: prevent fc_remote_port_delete calls for unregistered rport
  [SCSI] zfcp: fix deadlock caused by shared work queue tasks
  [SCSI] zfcp: put threshold data in hba trace
  [SCSI] zfcp: Simplify zfcp data structures
  [SCSI] zfcp: Simplify get_adapter_by_busid
  [SCSI] zfcp: remove all typedefs and replace them with standards
  [SCSI] zfcp: attach and release SAN nameserver port on demand
  [SCSI] zfcp: remove unused references, declarations and flags
  [SCSI] zfcp: Update message with input from review
  [SCSI] zfcp: add queue_full sysfs attribute
  [SCSI] scsi_dh: suppress comparison warning
  [SCSI] scsi_dh: add Dell product information into rdac device handler
  [SCSI] qla2xxx: remove the unused SCSI_QLOGIC_FC_FIRMWARE option
  [SCSI] qla2xxx: fix printk format warnings
  [SCSI] qla2xxx: Update version number to 8.02.01-k8.
  [SCSI] qla2xxx: Ignore payload reserved-bits during RSCN processing.
  [SCSI] qla2xxx: Additional residual-count corrections during UNDERRUN handling.
  ...
2008-10-10 10:53:26 -07:00
Tejun Heo
f331c0296f block: don't depend on consecutive minor space
* Implement disk_devt() and part_devt() and use them to directly
  access devt instead of computing it from ->major and ->first_minor.

  Note that all references to ->major and ->first_minor outside of
  block layer is used to determine devt of the disk (the part0) and as
  ->major and ->first_minor will continue to represent devt for the
  disk, converting these users aren't strictly necessary.  However,
  convert them for consistency.

* Implement disk_max_parts() to avoid directly deferencing
  genhd->minors.

* Update bdget_disk() such that it doesn't assume consecutive minor
  space.

* Move devt computation from register_disk() to add_disk() and make it
  the only one (all other usages use the initially determined value).

These changes clean up the code and will help disk->part dereference
fix and extended block device numbers.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09 08:56:05 +02:00
Pierre Ossman
a7bbb57333 [SCSI] mmc_block: use generic helper to print capacities
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-10-03 11:46:15 -05:00
Linus Torvalds
5c0a95c73f Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc:
  mmc_test: initialize mmc_test_lock statically
  mmc_block: handle error from mmc_register_driver()
  atmel-mci: Set MMC_CAP_NEEDS_POLL if no detect_pin
  atmel-mci: Fix bogus debugfs file size
  atmel-mci: Fix memory leak in atmci_regs_show
  atmel-mci: debugfs: enable clock before dumping regs
  tmio_mmc: fix compilation with debug enabled
2008-09-21 12:38:45 -07:00
Akinobu Mita
a650031a6b mmc_test: initialize mmc_test_lock statically
The mutex mmc_test_lock is initialized at every time mmc_test device
is probed. Probing another mmc_test device may break the mutex, if
the probe function is called while the mutex is locked.

This patch fixes it by statically initializing mmc_test_lock.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-09-20 13:03:50 +02:00
Akinobu Mita
9d4e98e960 mmc_block: handle error from mmc_register_driver()
Check error from mmc_register_driver() and properly unwind
block device registration.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-09-20 13:03:26 +02:00
Andrew Morton
70bb08962e drivers/mmc/card/block.c: fix refcount leak in mmc_block_open()
mmc_block_open() increments md->usage although it returns with -EROFS when
default mounting a MMC/SD card with write protect switch on.  This
reference counting bug prevents /dev/mmcblkX from being released on card
removal, and situation worsen with reinsertion until the minor number
range runs out.

Reported-by: <sasin@solomon-systech.com>
Acked-by: Pierre Ossman <drzeus-list@drzeus.cx>
Cc: <stable@kernel.org>		[2.6.25.x, 2.6.26.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-09-05 14:39:38 -07:00
Pierre Ossman
b41e9c7b8e mmc_block: use proper sg iterators
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-08-01 19:03:38 +02:00
Pierre Ossman
b7ac2cf1cd mmc_test: Revert "mmc_test: test oversized sg lists"
This reverts commit 48b5352ea1. Oversized
sg lists are not allowed anymore, and the core even checks for them in
debug mode, so this test is entirely incorrect.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-08-01 19:03:37 +02:00
Pierre Ossman
60c9c7b1d9 mmc_test: print message when attaching to card
Make it a bit more obvious that the card has been claimed by the
mmc_test driver so that people don't have to wonder why their block
device never shows up.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-23 14:42:09 +02:00
Pierre Ossman
2ff1fa6791 mmc_block: bounce buffer highmem support
Support highmem pages in the bounce buffer code by using the
sg_copy_from/to_buffer() functions.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-23 14:42:09 +02:00
Pierre Ossman
48b5352ea1 mmc_test: test oversized sg lists
Add tests that make sure the driver properly checks the blocks and
blksz fields and doesn't assume the sg list has a size that perfectly
matches the current request.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-23 14:42:08 +02:00
Pierre Ossman
2661081f5a mmc_test: highmem tests
Add a couple of tests to make sure the host driver handles highmem
memory pages properly. Unfortunately there is no way to guarantee an
allocation below 4 GB in i386, so it might give you addresses that
are out of reach for the hardware (OTOH, so will any other highmem
allocation in the kernel).

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-23 14:42:08 +02:00
David Howells
c43d863697 sdio_uart: Fix SDIO break control to now return success or an error
This is a consequence of patch 9ea761bfef52c116fed4715d4043392c2503fe6a.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-15 15:47:04 +02:00
Pierre Ossman
23af60398a mmc: remove multiwrite capability
Relax requirements on host controllers and only require that they do not
report a transfer count than is larger than the actual one (i.e. a lower
value is okay). This is how many other parts of the kernel behaves so
upper layers should already be prepared to handle that scenario. This
gives us a performance boost on MMC cards.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-15 14:14:49 +02:00
Pierre Ossman
6b174931a7 mmc_test: cleanup
Clean up and reorganise the mmc_test driver so that it (hopefully)
is easier to extend with more complex tests.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-15 14:14:45 +02:00
Pierre Ossman
979ce7208a mmc_block: wait for card even on failures
Many failures are non-permanent, but the card might need some time to
finish what it is doing before becoming responsive again. Make sure we
wait for it to finish programming before dealing with the error.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-15 14:14:45 +02:00
Pierre Ossman
0121a9829b mmc_test: only bind to supported cards
We can only perform the tests on MMC and SD cards, so avoid binding
to any other type.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-15 14:14:44 +02:00
Pierre Ossman
fd8c326cad mmc_test: add test case control
Add the ability to run just a single test case by writing the test
case number into the sysfs "test" file.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-15 14:14:40 +02:00
Ben Collins
203c80187e mmc: Fix crash in mmc_block on 64-bit
Fairly simple. "dev_use" was being allocated as a zero length array
because of bad math on 64-bit systems, causing a crash in
find_first_zero_bit(). One-liner follows:

Signed-off-by: Ben Collins <ben.collins@canonical.com>
Acked-by: Pierre Ossman <drzeus@drzeus.cx>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-05 16:14:17 -07:00
Pierre Ossman
88ae600d58 mmc: mmc host test driver
A dummy driver that performs a series of requests that are often mis-
handled by host drivers.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-05-14 21:02:16 +02:00
Kiyoshi Ueda
fd539832c7 blk_end_request: changing mmc (take 4)
This patch converts mmc to use blk_end_request interfaces.
Related 'uptodate' arguments are converted to 'error'.

Cc: Pierre Ossman <drzeus-mmc@drzeus.cx>
Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-01-28 10:36:52 +01:00
Andre Haupt
a960d5dc71 sdio_uart: fix sign of paramter status in sdio_uart_receive_chars()
This also fixes a sparse warning about different signedness.
Only compile tested, because i do not have the hardware.

Signed-off-by: Andre Haupt <andre@bitwigglers.org>
Acked-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-11-29 19:10:30 +01:00
Haavard Skinnemoen
05e5b13645 mmc: Add missing sg_init_table() call
mmc_init_queue only initializes the scatterlists with sg_init_table()
when using a bounce buffer. This leads to a BUG() when CONFIG_DEBUG_SG
is set.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-11-27 09:19:40 +01:00
David Woodhouse
1dff314451 mmc: Avoid re-using minor numbers before the original device is closed.
Move the code which marks the minor number as free to mmc_blk_put() so
that it happens on the final close() (or removal), instead of doing it
at removal even when the device is still logically open.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-11-21 18:45:38 +01:00