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* block: Do away with the notion of hardsect_sizeMartin K. Petersen2009-05-221-1/+1
| | | | | | | | | | | | | | 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>
* block: implement and enforce request peek/start/fetchTejun Heo2009-05-111-6/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* xsysace: dequeue in-flight requestTejun Heo2009-05-111-6/+13
| | | | | | | | | | | | | | | | | xsysace already tracks in-flight request using ace->req. Converting to dequeueing model is mostly a matter of adding dequeueing call after request fetching. The only tricky part is handling CF removal which should complete both in flight and on queue requests. Convert to dequeueing model. While at it, remove explicit blk_rq_cur_bytes() and use __blk_end_request_cur() instead. [ Impact: dequeue in-flight request ] Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* block: convert to pos and nr_sectors accessorsTejun Heo2009-05-111-8/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* block: implement blk_rq_pos/[cur_]sectors() and convert obvious onesTejun Heo2009-05-111-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | Implement accessors - blk_rq_pos(), blk_rq_sectors() and blk_rq_cur_sectors() which return rq->hard_sector, rq->hard_nr_sectors and rq->hard_cur_sectors respectively and convert direct references of the said fields to the accessors. This is in preparation of request data length handling cleanup. Geert : suggested adding const to struct request * parameter to accessors Sergei : spotted error in patch description [ Impact: cleanup ] Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Acked-by: Stephen Rothwell <sfr@canb.auug.org.au> Tested-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Grant Likely <grant.likely@secretlab.ca> Ackec-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Cc: Borislav Petkov <petkovbb@googlemail.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* block: replace end_request() with [__]blk_end_request_cur()Tejun Heo2009-04-281-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | end_request() has been kept around for backward compatibility; however, it's about time for it to go away. * There aren't too many users left. * Its use of @updtodate is pretty confusing. * In some cases, newer code ends up using mixture of end_request() and [__]blk_end_request[_all](), which is way too confusing. So, add [__]blk_end_request_cur() and replace end_request() with it. Most conversions are straightforward. Noteworthy ones are... * paride/pcd: next_request() updated to take 0/-errno instead of 1/0. * paride/pf: pf_end_request() and next_request() updated to take 0/-errno instead of 1/0. * xd: xd_readwrite() updated to return 0/-errno instead of 1/0. * mtd/mtd_blkdevs: blktrans_discard_request() updated to return 0/-errno instead of 1/0. Unnecessary local variable res initialization removed from mtd_blktrans_thread(). [ Impact: cleanup ] Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Joerg Dorchain <joerg@dorchain.net> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Laurent Vivier <Laurent@lvivier.info> Cc: Tim Waugh <tim@cyberelk.net> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Paul Mackerras <paulus@samba.org> Cc: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Markus Lidel <Markus.Lidel@shadowconnect.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Pete Zaitcev <zaitcev@redhat.com> Cc: unsik Kim <donari75@gmail.com>
* xsysace: Fix dereferencing of cf_id after hd_driveid removalGrant Likely2009-04-081-6/+6
| | | | | | | | | | | | | | | | Commit 4aaf2fec718f6fbf38668edf733a0ab09a49cab1 (xsysace: make it 'struct hd_driveid'-free) converted the cf_id member of 'struct ace_device' from a 'struct hd_driveid' to a u16 array. However, references to the base of the structure were still using the '&' operator. When the address was used with the ata_id_u32() macro, the compiler used the size of the entire array instead of sizeof(u16) to calculate the offset from the base address. This patch removes the use of the '&' operator from all references of cf_id to fix the bug and remove future confusion. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* xsysace: make it 'struct hd_driveid'-freeBartlomiej Zolnierkiewicz2009-04-011-17/+13
| | | | | | | | | | | | | | | | * Change cf_id field in struct ace_device from 'struct hd_driveid *id' to 'u16 *id' and update driver accordingly. * Include <linux/ata.h> directly instead of through <linux/hdreg.h>. While at it: * Use ata_id_u32() macro. There should be no functional changes caused by this patch. Cc: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* Fix Xilinx SystemACE driver to handle empty CF slotGrant Likely2009-03-141-0/+22
| | | | | | | | | The SystemACE driver does not handle an empty CF slot gracefully. An empty CF slot ends up hanging the system. This patch adds a check for the CF state and stops trying to process requests if the slot is empty. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* powerpc/xsysace: add compatible string for non-ipcore instanceYuri Tikhonov2009-01-091-0/+1
| | | | | | | | | | Add "xlnx,sysace" compatible string to the of_platform binding table. Platforms which have the SysACE chip on board (e.g. Katmai) instead of via a Xilinx generated IP core will use this value in their device tree. Signed-off-by: Yuri Tikhonov <yur@emcraft.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* xsysace: Fix driver to use resource_size_t instead of unsigned longYuri Tikhonov2008-11-141-9/+10
| | | | | | | | | | This patch is a bug fix to the SystemACE driver to use resource_size_t for physical address instead of unsigned long. This makes the driver work correctly on 32 bit systems with 64-bit resources (e.g. PowerPC 440). Signed-off-by: Yuri Tikhonov <yur@emcraft.com> Signed-off-by: Ilya Yanok <yanok@emcraft.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* powerpc/virtex: fix various format/casting printk mismatchesGrant Likely2008-11-141-2/+2
| | | | | | | | | Various printk format string in code used by the Xilinx Virtex platform are not 32-bit/64-bit safe. Add correct casting to fix the bugs. Reported-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
* [PATCH] switch xyspaceAl Viro2008-10-211-8/+7
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [PATCH] beginning of methods conversionAl Viro2008-10-211-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | 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>
* [POWERPC] Xilinx: Update compatible to use values generated by BSP generator.Stephen Neuendorffer2008-02-061-1/+3
| | | | | | | | | | | | Mainly, this involves two changes: 1) xilinx->xlnx (recognized standard is to use the stock ticker) 2) In order to have the device tree focus on describing what the hardware is as exactly as possible, the compatible strings contain the full IP name and IP version. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* [POWERPC] Fix incorrectly tagged __devinitdata structuresGrant Likely2008-02-061-1/+1
| | | | | | | | Fix compile errors in the xilinxfb, xsysace and uartlite drivers used by the Xilinx Virtex platform Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
* xsysace: end request handling fixJens Axboe2008-01-291-4/+2
| | | | | | | | | In ace_fsm_dostate(), the variable 'i' was used only for passing sector size of the request to end_that_request_first(). So I removed it and changed the code to pass the size in bytes directly to __blk_end_request() Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* blk_end_request: changing xsysace (take 4)Kiyoshi Ueda2008-01-281-4/+1
| | | | | | | | | | | | | | | | | | | | | | This patch converts xsysace to use blk_end_request interfaces. Related 'uptodate' arguments are converted to 'error'. xsysace is a little bit different from "normal" drivers. xsysace driver has a state machine in it. It calls end_that_request_first() and end_that_request_last() from different states. (ACE_FSM_STATE_REQ_TRANSFER and ACE_FSM_STATE_REQ_COMPLETE, respectively.) However, those states are consecutive and without any interruption inbetween. So we can just follow the standard conversion rule (b) mentioned in the patch subject "[PATCH 01/30] blk_end_request: add new request completion interface". Cc: Grant Likely <grant.likely@secretlab.ca> 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>
* Add missing newlines to some uses of dev_<level> messagesJoe Perches2007-10-181-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Found these while looking at printk uses. Add missing newlines to dev_<level> uses Add missing KERN_<level> prefixes to multiline dev_<level>s Fixed a wierd->weird spelling typo Added a newline to a printk Signed-off-by: Joe Perches <joe@perches.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Mark M. Hoffman <mhoffman@lightlink.com> Cc: Roland Dreier <rolandd@cisco.com> Cc: Tilman Schmidt <tilman@imap.cc> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Jeff Garzik <jeff@garzik.org> Cc: Stephen Hemminger <shemminger@linux-foundation.org> Cc: Greg KH <greg@kroah.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Cc: James Smart <James.Smart@Emulex.Com> Cc: Andrew Vasquez <andrew.vasquez@qlogic.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Jaroslav Kysela <perex@suse.cz> Cc: Takashi Iwai <tiwai@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Sysace: Don't enable IRQ until after interrupt handler is registeredGrant Likely2007-10-101-5/+5
| | | | | | | | | The previous patch to move the interrupt handler registration moved it below enabling interrupts which could be a problem if the device is on a shared interrupt line. This patch fixes the order. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* Sysace: sparse fixesGrant Likely2007-10-101-5/+5
| | | | | Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* Sysace: Minor coding convention fixupGrant Likely2007-10-101-3/+6
| | | | | | | Put function call and return code test on separate lines. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* Sysace: Labels in C code should not be indented.Grant Likely2007-10-101-10/+10
| | | | | | | Remove the indentation on labels Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* Sysace: Add of_platform_bus bindingGrant Likely2007-10-101-0/+89
| | | | | | | | The of_platform bus binding is needed to make the device driver usable under arch/powerpc. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* Sysace: Move IRQ handler registration to occur after FSM is initializedGrant Likely2007-10-101-11/+10
| | | | | | | The FSM needs to be initialized before it is safe to call the ISR Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* Sysace: minor rework and cleanup changesGrant Likely2007-10-101-3/+9
| | | | | | | | Miscellanious rework to the sysace driver; Not critical, but makes the subsequent addition of the of_platform bus binding a wee bit cleaner Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* Sysace: Move structure allocation from bus binding into common codeGrant Likely2007-10-101-38/+61
| | | | | | | | | Split the determination of device registers/irqs/etc from the actual allocation and initialization of the device structure. This cleans up the code a bit in preparation to add an of_platform bus binding Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* Sysace: Use the established platform bus apiGrant Likely2007-10-101-18/+30
| | | | | | | | | SystemACE uses the platform bus binding, but it doesn't use the platform bus API. Move to using the correct API for consistency sake and future proofing against platform bus changes. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* sysace: HDIO_GETGEO has it's own method for agesChristoph Hellwig2007-08-111-19/+10
| | | | | | | | | | | The way this driver tries to implement HDIO_GETGEO it'll never be called. Then again on ppc it probably will never be called anyway because it's utterly pointless. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* [BLOCK] Get rid of request_queue_t typedefJens Axboe2007-07-241-2/+2
| | | | | | | | | 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>
* unregister_blkdev(): delete redundant messageAkinobu Mita2007-07-171-3/+1
| | | | | | | | | | No need to warn unregister_blkdev() failure by caller. (The previous patch makes unregister_blkdev() print error message in error case) Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Add support for Xilinx SystemACE CompactFlash interfaceGrant Likely2007-07-171-0/+1166
Tested on Xilinx Virtex ppc405, Katmai 440SPe, and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Stefan Roese <sr@denx.de> Cc: Jens Axboe <axboe@kernel.dk> Cc: John William <jwilliams@itee.uq.edu.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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