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* block: implement and enforce request peek/start/fetchTejun Heo2009-05-111-9/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* block: convert to dequeueing model (easy ones)Tejun Heo2009-05-111-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* arm-omap: don't abuse rq->dataTejun Heo2009-04-281-12/+31
| | | | | | | | | | | | | omap mailbox uses rq->data as the second opaque pointer to carry mbox_msg_t and rq->special message argument which is needed only for tx. Add and use omap_msg_tx_data struct for tx and use rq->special for mbox_msg_t for rx such that only rq->special is used as opaque pointer. [ Impact: cleanup rq->data usage, extra kmalloc in msg_send ] Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Russell King <rmk@arm.linux.org.uk>
* block: implement and use [__]blk_end_request_all()Tejun Heo2009-04-281-8/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are many [__]blk_end_request() call sites which call it with full request length and expect full completion. Many of them ensure that the request actually completes by doing BUG_ON() the return value, which is awkward and error-prone. This patch adds [__]blk_end_request_all() which takes @rq and @error and fully completes the request. BUG_ON() is added to to ensure that this actually happens. Most conversions are simple but there are a few noteworthy ones. * cdrom/viocd: viocd_end_request() replaced with direct calls to __blk_end_request_all(). * s390/block/dasd: dasd_end_request() replaced with direct calls to __blk_end_request_all(). * s390/char/tape_block: tapeblock_end_request() replaced with direct calls to blk_end_request_all(). [ Impact: cleanup ] Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Mike Miller <mike.miller@hp.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Jeff Garzik <jgarzik@pobox.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Alex Dubov <oakad@yahoo.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
* omap mailbox: remove unnecessary header file inclusionHiroshi DOYU2009-03-231-5/+1
| | | | | Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
* omap mailbox: convert sequence bit checking to module paramterHiroshi DOYU2009-03-231-19/+16
| | | | | Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
* omap mailbox: move mailbox.h into mailbox.cHiroshi DOYU2009-03-231-1/+85
| | | | | | | no need to keep mailbox.h separately. Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
* omap mailbox: fix empty struct device for omap_mboxHiroshi DOYU2009-03-231-32/+31
| | | | | | | | | | Since "mbox->dev" doesn't exist and isn't created either at registration, this patch will create "struct device", which belongs to "omap-mailbox" class and set this pointer for the member of "struct omap_mbox". Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
* [ARM] Convert asm/io.h to linux/io.hRussell King2008-09-061-1/+1
| | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/machRussell King2008-08-071-1/+1
| | | | | | This just leaves include/asm-arm/plat-* to deal with. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* arm: bus_id -> dev_name() and dev_set_name() conversionsKay Sievers2008-07-211-1/+1
| | | | | | Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* driver core: remove KOBJ_NAME_LEN defineKay Sievers2008-07-211-1/+1
| | | | | | | | | Kobjects do not have a limit in name size since a while, so stop pretending that they do. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* ARM: OMAP: Fix Unbalanced enable for IRQ in omap mailboxHiroshi DOYU2008-05-091-1/+0
| | | | | Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* Merge branch 'blk-end-request' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds2008-01-291-10/+6
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'blk-end-request' of git://git.kernel.dk/linux-2.6-block: (30 commits) blk_end_request: changing xsysace (take 4) blk_end_request: changing ub (take 4) blk_end_request: cleanup of request completion (take 4) blk_end_request: cleanup 'uptodate' related code (take 4) blk_end_request: remove/unexport end_that_request_* (take 4) blk_end_request: changing scsi (take 4) blk_end_request: add bidi completion interface (take 4) blk_end_request: changing ide-cd (take 4) blk_end_request: add callback feature (take 4) blk_end_request: changing ide normal caller (take 4) blk_end_request: changing cpqarray (take 4) blk_end_request: changing cciss (take 4) blk_end_request: changing ide-scsi (take 4) blk_end_request: changing s390 (take 4) blk_end_request: changing mmc (take 4) blk_end_request: changing i2o_block (take 4) blk_end_request: changing viocd (take 4) blk_end_request: changing xen-blkfront (take 4) blk_end_request: changing viodasd (take 4) blk_end_request: changing sx8 (take 4) ...
| * blk_end_request: changing arm (take 4)Kiyoshi Ueda2008-01-281-10/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch converts arm's OMAP mailbox driver to use blk_end_request interfaces. If the original code was converted literally, blk_end_request would be called with '-EIO' because end_that_request_last() were called with '0' (i.e. failure). But I think these '0's are bugs in the original code because it's unlikely that all requests are treated as failure. (The bugs should have no effect unless these requests have an end_io callback.) So I changed them to pass '0' (i.e. success) to blk_end_request. Cc: Toshihiro Kobayashi <toshihiro.kobayashi@nokia.com> Cc: Hiroshi DOYU <Hiroshi.DOYU@nokia.com> 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>
* | [ARM] Remove pointless casts from void pointers,Jeff Garzik2008-01-261-1/+1
|/ | | | | | | mostly in and around irq handlers. Signed-off-by: Jeff Garzik <jgarzik@redhat.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [BLOCK] Get rid of request_queue_t typedefJens Axboe2007-07-241-4/+4
| | | | | | | | | Some of the code has been gradually transitioned to using the proper struct request_queue, but there's lots left. So do a full sweet of the kernel and get rid of this typedef and replace its uses with the proper type. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* ARM: OMAP: Add mailbox support for IVAHiroshi DOYU2007-05-091-0/+509
This patch adds a generic mailbox interface for for DSP and IVA (Image Video Accelerator). This patch itself doesn't contain any IVA driver. Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com> Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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