26 Feb, 2010
1 commit
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Except for SCSI no device drivers distinguish between physical and
hardware segment limits. Consolidate the two into a single segment
limit.Signed-off-by: Martin K. Petersen
Signed-off-by: Jens Axboe
02 Oct, 2009
1 commit
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Signed-off-by: Alexey Dobriyan
Cc: Chirag Kantharia
Cc: Tejun Heo
Cc: Grant Likely
Signed-off-by: Andrew Morton
Signed-off-by: Jens Axboe
22 Sep, 2009
1 commit
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Signed-off-by: Alexey Dobriyan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
23 May, 2009
1 commit
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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
Signed-off-by: Jens Axboe
11 May, 2009
2 commits
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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
Cc: Rusty Russell
Cc: James Bottomley
Cc: Mike Miller
Cc: unsik Kim
Cc: Paul Clements
Cc: Tim Waugh
Cc: Geert Uytterhoeven
Cc: David S. Miller
Cc: Laurent Vivier
Cc: Jeff Garzik
Cc: Jeremy Fitzhardinge
Cc: Grant Likely
Cc: Adrian McMenamin
Cc: Stephen Rothwell
Cc: Bartlomiej Zolnierkiewicz
Cc: Borislav Petkov
Cc: Sergei Shtylyov
Cc: Alex Dubov
Cc: Pierre Ossman
Cc: David Woodhouse
Cc: Markus Lidel
Cc: Stefan Weinhuber
Cc: Martin Schwidefsky
Cc: Pete Zaitcev
Cc: FUJITA Tomonori
Signed-off-by: Jens Axboe -
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
Acked-by: Geert Uytterhoeven
Tested-by: Grant Likely
Acked-by: Grant Likely
Tested-by: Adrian McMenamin
Acked-by: Adrian McMenamin
Acked-by: Mike Miller
Cc: James Bottomley
Cc: Bartlomiej Zolnierkiewicz
Cc: Borislav Petkov
Cc: Sergei Shtylyov
Cc: Eric Moore
Cc: Alan Stern
Cc: FUJITA Tomonori
Cc: Pete Zaitcev
Cc: Stephen Rothwell
Cc: Paul Clements
Cc: Tim Waugh
Cc: Jeff Garzik
Cc: Jeremy Fitzhardinge
Cc: Alex Dubov
Cc: David Woodhouse
Cc: Martin Schwidefsky
Cc: Dario Ballabio
Cc: David S. Miller
Cc: Rusty Russell
Cc: unsik Kim
Cc: Laurent Vivier
Signed-off-by: Jens Axboe
28 Apr, 2009
1 commit
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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
Cc: Russell King
Cc: Stephen Rothwell
Cc: Mike Miller
Cc: Martin Schwidefsky
Cc: Jeff Garzik
Cc: Rusty Russell
Cc: Jeremy Fitzhardinge
Cc: Alex Dubov
Cc: James Bottomley
24 Mar, 2009
1 commit
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We've been carrying this patch for the last 3 years in Fedora,
long past time we got it upstream...Call pci_set_master to enable bus-mastering if the BIOS hasn't
done it already.Signed-off-by: Kyle McMartin
Signed-off-by: Dave Jones
Signed-off-by: Jens Axboe
07 Nov, 2008
1 commit
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As reported by Dick Gevers on Compaq ProLiant:
Oct 13 18:06:51 dvgcpl kernel: Compaq SMART2 Driver (v 2.6.0)
Oct 13 18:06:51 dvgcpl kernel: sys_init_module: 'cpqarray'->init
suspiciously returned 1, it should follow 0/-E convention
Oct 13 18:06:51 dvgcpl kernel: sys_init_module: loading module anyway...
Oct 13 18:06:51 dvgcpl kernel: Pid: 315, comm: modprobe Not tainted
2.6.27-desktop-0.rc8.2mnb #1
Oct 13 18:06:51 dvgcpl kernel: [] ? printk+0x18/0x1e
Oct 13 18:06:51 dvgcpl kernel: [] sys_init_module+0x155/0x1c0
Oct 13 18:06:51 dvgcpl kernel: [] syscall_call+0x7/0xb
Oct 13 18:06:51 dvgcpl kernel: =======================Make it return 0 on success and -ENODEV if no array was found.
Reported-by: Dick Gevers
Signed-off-by: Andrey Borzenkov
Cc: Jens Axboe
Cc: Greg Kroah-Hartman
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
21 Oct, 2008
2 commits
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Signed-off-by: Al Viro
-
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
09 Oct, 2008
1 commit
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The kernel.h macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) /
(d)) but is perhaps more readable.An extract of the semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)//
@haskernel@
@@#include
@depends on haskernel@
expression n,d;
@@(
- (n + d - 1) / d
+ DIV_ROUND_UP(n,d)
|
- (n + (d - 1)) / d
+ DIV_ROUND_UP(n,d)
)@depends on haskernel@
expression n,d;
@@- DIV_ROUND_UP((n),d)
+ DIV_ROUND_UP(n,d)@depends on haskernel@
expression n,d;
@@- DIV_ROUND_UP(n,(d))
+ DIV_ROUND_UP(n,d)
//Signed-off-by: Julia Lawall
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Jens Axboe
29 Apr, 2008
1 commit
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Use creation by full path: "driver/foo".
Signed-off-by: Alexey Dobriyan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
28 Jan, 2008
1 commit
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This patch converts cpqarray to use blk_end_request interfaces.
Related 'ok' arguments are converted to 'error'.cpqarray is a little bit different from "normal" drivers.
cpqarray directly calls bio_endio() and disk_stat_add()
when completing request. But those can be replaced with
__end_that_request_first().
After the replacement, request completion procedures of
those drivers become like the following:
o end_that_request_first()
o add_disk_randomness()
o end_that_request_last()
This can be converted to __blk_end_request() by following
the rule (b) mentioned in the patch subject
"[PATCH 01/30] blk_end_request: add new request completion interface".Cc: Mike Miller
Signed-off-by: Kiyoshi Ueda
Signed-off-by: Jun'ichi Nomura
Signed-off-by: Jens Axboe
24 Oct, 2007
1 commit
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Commits
58b053e4ce9d2fc3023645c1b96e537c72aa8d9a ("Update arch/ to use sg helpers")
45711f1af6eff1a6d010703b4862e0d2b9afd056 ("[SG] Update drivers to use sg helpers")
fa05f1286be25a8ce915c5dd492aea61126b3f33 ("Update net/ to use sg helpers")converted many files to use the scatter gather helpers without ensuring
that the necessary headerfile is included. This
happened to work for ia64, powerpc, sparc64 and x86 because they
happened to drag in that file via their .On most of the others this probably broke.
Instead of increasing the header file spider web I choose to include
directly into the affectes files.Signed-off-by: Ralf Baechle
Signed-off-by: Jens Axboe
Signed-off-by: Linus Torvalds
23 Oct, 2007
1 commit
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Signed-off-by: Jens Axboe
16 Oct, 2007
1 commit
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The recent bio work and subsequent fixups created unused variables.
Signed-off-by: Jeff Garzik
Signed-off-by: Jens Axboe
10 Oct, 2007
1 commit
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As bi_end_io is only called once when the reqeust is complete,
the 'size' argument is now redundant. Remove it.Now there is no need for bio_endio to subtract the size completed
from bi_size. So don't do that either.While we are at it, change bi_end_io to return void.
Signed-off-by: Neil Brown
Signed-off-by: Jens Axboe
12 Aug, 2007
1 commit
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This patch removes some redundant casts, does the kmalloc + memset to
k[cz]alloc conversion and it changes the error path to use goto (to avoid code
duplication).drivers/block/cpqarray.c | 49567 -> 48623 (-944 bytes)
drivers/block/cpqarray.o | 178820 -> 178288 (-532 bytes)Signed-off-by: Mariusz Kozlowski
Acked-by: Mike Miller
Signed-off-by: Andrew Morton
Signed-off-by: Jens Axboe
24 Jul, 2007
1 commit
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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
14 Dec, 2006
1 commit
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Run this:
#!/bin/sh
for f in $(grep -Erl "\([^\)]*\) *k[cmz]alloc" *) ; do
echo "De-casting $f..."
perl -pi -e "s/ ?= ?\([^\)]*\) *(k[cmz]alloc) *\(/ = \1\(/" $f
doneAnd then go through and reinstate those cases where code is casting pointers
to non-pointers.And then drop a few hunks which conflicted with outstanding work.
Cc: Russell King , Ian Molton
Cc: Mikael Starvik
Cc: Yoshinori Sato
Cc: Roman Zippel
Cc: Geert Uytterhoeven
Cc: Ralf Baechle
Cc: Paul Mackerras
Cc: Kyle McMartin
Cc: Benjamin Herrenschmidt
Cc: Martin Schwidefsky
Cc: "David S. Miller"
Cc: Jeff Dike
Cc: Greg KH
Cc: Jens Axboe
Cc: Paul Fulghum
Cc: Alan Cox
Cc: Karsten Keil
Cc: Mauro Carvalho Chehab
Cc: Jeff Garzik
Cc: James Bottomley
Cc: Ian Kent
Cc: Steven French
Cc: David Woodhouse
Cc: Neil Brown
Cc: Jaroslav Kysela
Cc: Takashi Iwai
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
15 Nov, 2006
1 commit
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cpqarray needs to call disk_stat_add() for iostat to work.
Signed-off-by: Jens Axboe
Signed-off-by: Linus Torvalds
05 Oct, 2006
1 commit
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Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.Signed-Off-By: David Howells
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
04 Oct, 2006
1 commit
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kbuild explicitly includes this at build time.
Signed-off-by: Dave Jones
01 Oct, 2006
1 commit
-
Signed-off-by: Jens Axboe
15 Jul, 2006
1 commit
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Signed-off-by: Adrian Bunk
Acked-by: Mike Miller
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
03 Jul, 2006
1 commit
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Signed-off-by: Thomas Gleixner
Cc: Ingo Molnar
Cc: "David S. Miller"
Cc: Benjamin Herrenschmidt
Cc: Jens Axboe
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
27 Jun, 2006
3 commits
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And remove the now unneeded number field.
Also fixes all drivers that set these fields.Signed-off-by: Greg Kroah-Hartman
-
Also fixes up all files that #include it.
Signed-off-by: Greg Kroah-Hartman
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Removes the devfs_remove() function and all callers of it.
Signed-off-by: Greg Kroah-Hartman
26 Jun, 2006
2 commits
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WARNING: drivers/block/cpqarray.o - Section mismatch: reference to .init.text: from .text between 'cpqarray_register_ctlr' (at offset 0xe98) and 'alloc_cpqarray_hba'
WARNING: drivers/block/cpqarray.o - Section mismatch: reference to .init.text: from .text between 'cpqarray_register_ctlr' (at offset 0xe9c) and 'alloc_cpqarray_hba'Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Disk devices should use add_disk_randomness rather than SA_SAMPLE_RANDOM
Signed-off-by: Matt Mackall
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
25 Mar, 2006
1 commit
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this changes if() BUG(); constructs to BUG_ON() which is
cleaner, contains unlikely() and can better optimized away.Signed-off-by: Eric Sesterhenn
Signed-off-by: Adrian Bunk
09 Jan, 2006
2 commits
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Use ARRAY_SIZE macro instead of sizeof(x)/sizeof(x[0]) and remove a
duplicate of ARRAY_SIZE. Some trailing whitespaces are also removed.drivers/block/acsi* has been left out as it's marked BROKEN.
Signed-off-by: Tobias Klauser
Cc: Jens Axboe
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
HDIO_GETGEO is implemented in most block drivers, and all of them have to
duplicate the code to copy the structure to userspace, as well as getting
the start sector. This patch moves that to common code [1] and adds a
->getgeo method to fill out the raw kernel hd_geometry structure. For many
drivers this means ->ioctl can go away now.[1] the s390 block drivers are odd in this respect. xpram sets ->start
to 4 always which seems more than odd, and the dasd driver shifts
the start offset around, probably because of it's non-standard
sector size.Signed-off-by: Christoph Hellwig
Cc: Jens Axboe
Cc:
Cc: Jeff Dike
Cc: Paolo Giarrusso
Cc: Bartlomiej Zolnierkiewicz
Cc: Neil Brown
Cc: Markus Lidel
Cc: Russell King
Cc: David Woodhouse
Cc: Martin Schwidefsky
Cc: James Bottomley
Signed-off-by: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
06 Jan, 2006
1 commit
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add @uptodate argument to end_that_request_last() and @error
to rq_end_io_fn(). there's no generic way to pass error code
to request completion function, making generic error handling
of non-fs request difficult (rq->errors is driver-specific and
each driver uses it differently). this patch adds @uptodate
to end_that_request_last() and @error to rq_end_io_fn().for fs requests, this doesn't really matter, so just using the
same uptodate argument used in the last call to
end_that_request_first() should suffice. imho, this can also
help the generic command-carrying request jens is working on.Signed-off-by: tejun heo
Signed-Off-By: Jens Axboe
17 Apr, 2005
1 commit
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Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.Let it rip!
