Commit graph

32 commits

Author SHA1 Message Date
Stefan Richter
a1842be898 ieee1394: nodemgr: grab class.subsys.rwsem in nodemgr_resume_ne
nodemgr_resume_ne was iterating over nodemgr_ud_class.children without
protection by nodemgr_ud_class.subsys.rwsem.

FIXME:
Shouldn't we rather use class->sem there, not class->subsys.rwsem?

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-09-17 19:38:43 +02:00
Stefan Richter
9b51601086 ieee1394: nodemgr: fix rwsem recursion
nodemgr_update_pdrv grabbed an rw semaphore (as reader) which was
already taken by its caller's caller, nodemgr_probe_ne (as reader too).
Reported by Miles Lane, call path pointed out by Arjan van de Ven.

FIXME:
Shouldn't we rather use class->sem there, not class->subsys.rwsem?

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-09-17 19:38:14 +02:00
Stefan Richter
9951903e61 ieee1394: shrink tlabel pools, remove tpool semaphores
This patch reduces the size of struct hpsb_host and also removes
semaphores from ieee1394_transactions.c.  On i386, struct hpsb_host
shrinks from 10656 bytes to 6688 bytes.  This is accomplished by
 - using a single wait_queue for hpsb_get_tlabel instead of many
   instances of semaphores,
 - using a single lock to serialize access to all tlabel pools (the
   protected code regions are small, i.e. lock contention very low),
 - omitting the sysfs attribute tlabels_allocations.

Drawback:  In the rare case that a process needs to sleep because all
transaction labels for the node are temporarily exhausted, it is also
woken up if a tlabel for a different node became free, checks for an
available tlabel, and is put to sleep again.  The check is not costly
and the situation occurs extremely rarely.  (Tlabels are typically
only exhausted if there was no context switch to the khpsbpkt thread
which recycles tlables.)  Therefore the benefit of reduced tpool size
outweighs this drawback.

The sysfs attributes tlabels_free and tlabels_mask are not compiled
anymore unless CONFIG_IEEE1394_VERBOSEDEBUG is set.

The by far biggest member of struct hpsb_host, the struct csr_control
csr (5272 bytes on i386), is now placed at the end of struct hpsb_host.

Note, hpsb_get_tlabel calls the macro wait_event_interruptible with a
condition argument which has a side effect (allocation of a tlabel and
manipulation of the packet).  This side effect happens only if the
condition is true.  The patch relies on wait_event_interruptible not
evaluating the condition again after it became true.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-09-17 19:17:13 +02:00
Stefan Richter
cab8d154e2 [PATCH] ieee1394: nodemgr: convert nodemgr_serialize semaphore to mutex
Another trivial sem2mutex conversion.

Side note:  nodemgr_serialize's purpose, when introduced in linux1394's
revision 529 in July 2002, was to protect several data structures which
are now largely handled by or together with Linux' driver core and are
now protected by the LDM's own mechanisms.  It may very well be possible
to remove this mutex now.  But fully parallelized node scanning is on
our long-term TODO list anyway; the mutex will certainly go away then.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Ben Collins <bcollins@ubuntu.com>
2006-07-03 12:02:36 -04:00
Stefan Richter
d2f119fe31 [PATCH] ieee1394: nodemgr: switch to kthread api, replace reset semaphore
Convert nodemgr's host thread from kernel_thread to kthread and its
sleep/restart mechanism from a counting semaphore to a schedule()/
wake_up_process() scheme.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Ben Collins <bcollins@ubuntu.com>
2006-07-03 12:02:35 -04:00
Stefan Richter
3a632fe232 [PATCH] ieee1394: nodemgr: make module parameter ignore_drivers writable
Nodemgr's ignore_drivers variable is exposed as a module load parameter
(therefore also as a sysfs attribute below /sys/module) and additionally
as an attribute below /sys/bus/ieee1394.  Since the latter is writable,
make the former writable too.

Note, the bus's attribute ignore_drivers is only relevant to newly added
units, not to present or suspended or resuming units.  Those have their
own attribute ignore_driver.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Ben Collins <bcollins@ubuntu.com>
2006-07-03 12:02:35 -04:00
Stefan Richter
40fd89cc54 [PATCH] ieee1394: nodemgr: do not spawn kernel_thread for sysfs rescan
nodemgr.c::fw_set_rescan() is used to re-run the driver core over
nodemgr's representation of unit directories in order to initiate
protocol driver probes.  It is initiated via write access to one of
nodemgr's sysfs attributes.  The purpose is to attach drivers to
units after switching a unit's ignore_driver attribute from 1 to 0.

It is not really necessary to fork a kernel_thread for this job.  The
call to kernel_thread() can be eliminated to avoid the deprecated API
and to simplify the code a bit.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Ben Collins <bcollins@ubuntu.com>
2006-07-03 12:02:34 -04:00
Stefan Richter
1ee0dc51fb [PATCH] ieee1394: nodemgr: remove unnecessary includes
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Ben Collins <bcollins@ubuntu.com>
2006-07-03 12:02:33 -04:00
Stefan Richter
de4394f13c [PATCH] ieee1394: update #include directives in midlayer header files
Remove unnecessary includes, add missing includes.
Use forward type declarations for some structs.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Ben Collins <bcollins@ubuntu.com>
2006-07-03 12:02:29 -04:00
Stefan Richter
d7530a1e76 [PATCH] ieee1394: fix cosmetic problem in speed probe
If ieee1394.h::IEEE1394_SPEED_MAX is bigger than the actual speed of an
1394b host adapter and the speed to another 1394b node was probed, a
bigger speed than actually used was kept in host->speed[n].  The only
resulting problem so far was sbp2 displaying bogus values in the syslog,
e.g. S3200 for actual S800 connections if IEEE1394_SPEED_MAX was S3200.
But other high-level drivers which access this field could get into more
trouble.  (Eth1394 is the only other in-tree driver which does so.  It
seems it is not affected.)

Nodemgr now clips this value according to the host adapter's link speed.

A pointer expression in nodemgr_check_speed is also changed for clarity.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Ben Collins <bcollins@ubuntu.com>
2006-07-03 00:03:59 -04:00
Jörn Engel
6ab3d5624e Remove obsolete #include <linux/config.h>
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-06-30 19:25:36 +02:00
Stefan Richter
09a9a45dc6 [PATCH] ieee1394: nodemgr: do not peek into struct semaphore
Also revert patch "frv: ieee1394 is borken on frv", as it no longer is.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: David Howells <dhowells@redhat.com>
Cc: Jody McIntyre <scjody@modernduck.com>
Cc: Ben Collins <bcollins@ubuntu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-25 10:00:54 -07:00
Ben Collins
647dcb5fae ieee1394: support for slow links or slow 1394b phy ports
Add support for the following types of hardware:
 + nodes that have a link speed < PHY speed
 + 1394b PHYs that are less than S800 capable
 + 1394b/1394a adapter cable between two 1394b PHYs
Also, S1600 and S3200 are now supported if IEEE1394_SPEED_MAX is raised.

A probing function is added to nodemgr's config ROM fetching routine
which adjusts the allowable speed if an access problem was encountered.
Pros and Cons of the approach:
 + minimum code footprint to support this less widely used hardware
 + nearly no overhead for unaffected hardware
 - ineffective before nodemgr began to read the ROM of affected nodes
 - ineffective if ieee1394 is loaded with disable_nodemgr=1
The speed map CSRs which are published to the bus are not touched by the
patch.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: Hakan Ardo <hakan@debian.org>
Cc: Calculex <linux@calculex.com>
Cc: Robert J. Kosinski <robk@cmcherald.com>
Signed-off-by: Ben Collins <bcollins@ubuntu.com>
2006-06-12 18:12:37 -04:00
Jody McIntyre
0a75c23a00 Merge with http://kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git 2006-01-05 08:03:40 -05:00
Kay Sievers
312c004d36 [PATCH] driver core: replace "hotplug" by "uevent"
Leave the overloaded "hotplug" word to susbsystems which are handling
real devices. The driver core does not "plug" anything, it just exports
the state to userspace and generates events.

Signed-off-by: Kay Sievers <kay.sievers@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-04 16:18:08 -08:00
Stefan Richter
d51e86c18a ieee1394: write broadcast_channel only to select nodes (fixes device recognition)
Some old 1394-1995 SBP-2 bridges would hang if they received a broadcast write
request to BROADCAST_CHANNEL before the config ROM was read.  Affected devices
include Datafab MD2-FW2 2.5" HDD and SmartDisk VST FWCDRW-V8 portable CD writer.
The write request is now directed to specific nodes instead of being broadcast
to all nodes at once, and it is only performed if a previous read request at
this register succeeded.

Fixes an old interoperability problem which was perceived as a 2.6.14-specific
regression: http://marc.theaimsgroup.com/?t=113190586800003

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Jody McIntyre <scjody@modernduck.com>
(cherry picked from 61c7f775ca commit)
2005-12-12 23:21:12 -05:00
Stefan Richter
48622b7bde ieee1394: resume remote ports when starting a host (fixes device recognition)
After initializing an IEEE 1394 host, broadcast a resume packet.  This makes
remote nodes visible which suspended their ports while the host was down.
Such nodes had to be unplugged and replugged in order to be recognized.

Motorola DCT6200 cable reciever was affected, probably other devices too.
http://marc.theaimsgroup.com/?t=113202715800001

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Jody McIntyre <scjody@modernduck.com>
(cherry picked from 14c0fa243b commit)
2005-12-12 23:20:58 -05:00
Stefan Richter
51c1d80e92 ieee1394: run high-level updates before high-level probes
After a bus reset, let nodemgr call high-level update hooks first for nodes
which do not need to be probed.  The main benefit is for a bus with more
than one SBP-2 device:  SBP-2 reconnects will be performed before SBP-2
logins, thus have a much higher chance to succeed, and their SCSI devices
will not be blocked much longer than necessary.  This was demonstrated for
Linux 2.4 by Dave Cinege a while ago.

A better approach would be to perform time-consuming probes in parallel by a
subthread.  I actually plan to implement this for sbp2 but it may take a
while to get that done and tested.  Until then, this tweak is a huge
improvement for users with multiple SBP-2 devices.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Jody McIntyre <scjody@modernduck.com>
2005-12-12 23:03:19 -05:00
Stefan Richter
61c7f775ca ieee1394: write broadcast_channel only to select nodes (fixes device recognition)
Some old 1394-1995 SBP-2 bridges would hang if they received a broadcast write
request to BROADCAST_CHANNEL before the config ROM was read.  Affected devices
include Datafab MD2-FW2 2.5" HDD and SmartDisk VST FWCDRW-V8 portable CD writer.
The write request is now directed to specific nodes instead of being broadcast
to all nodes at once, and it is only performed if a previous read request at
this register succeeded.

Fixes an old interoperability problem which was perceived as a 2.6.14-specific
regression: http://marc.theaimsgroup.com/?t=113190586800003

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Jody McIntyre <scjody@modernduck.com>
2005-12-05 16:28:59 -05:00
Stefan Richter
d7758461b9 ieee1394: add definitions for phy packet constants
Introduce new macros related to phy packets and use them in ieee1394_core and
nodemgr.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Jody McIntyre <scjody@modernduck.com>
2005-12-01 18:51:56 -05:00
Stefan Richter
14c0fa243b ieee1394: resume remote ports when starting a host (fixes device recognition)
After initializing an IEEE 1394 host, broadcast a resume packet.  This makes
remote nodes visible which suspended their ports while the host was down.
Such nodes had to be unplugged and replugged in order to be recognized.

Motorola DCT6200 cable reciever was affected, probably other devices too.
http://marc.theaimsgroup.com/?t=113202715800001

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Jody McIntyre <scjody@modernduck.com>
2005-12-01 18:51:52 -05:00
Stefan Richter
8551158abc kmalloc/kzalloc changes:
dv1394, eth1394, ieee1394, ohci1394, pcilynx, raw1394, sbp2c, video1394:
 - use kzalloc
 - provide safer size arguments to kmalloc and kzalloc
 - omit some casts

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Jody McIntyre <scjody@modernduck.com>
2005-11-07 06:31:45 -05:00
Russell King
9480e307cd [PATCH] DRIVER MODEL: Get rid of the obsolete tri-level suspend/resume callbacks
In PM v1, all devices were called at SUSPEND_DISABLE level.  Then
all devices were called at SUSPEND_SAVE_STATE level, and finally
SUSPEND_POWER_DOWN level.  However, with PM v2, to maintain
compatibility for platform devices, I arranged for the PM v2
suspend/resume callbacks to call the old PM v1 suspend/resume
callbacks three times with each level in order so that existing
drivers continued to work.

Since this is obsolete infrastructure which is no longer necessary,
we can remove it.  Here's an (untested) patch to do exactly that.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-10-28 09:52:56 -07:00
Jody McIntyre
e31a127c2f [PATCH] ieee1394: skip unnecessary pause when scanning config ROMs
Skip a superfluous pause that occured when the config ROM of a node was
scanned unsuccessfully.  This also occurs if a node without link wrongly
enables its "link active" self ID flag.  A GWCTech 6-port hub does this.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Jody McIntyre <scjody@steamballoon.com>
Cc: Ben Collins <bcollins@debian.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-30 12:41:19 -07:00
Jody McIntyre
328699bf0f [PATCH] ieee1394: reorder activities after bus reset (fixes device detection)
Units were not detected if the local IRM performed a bus reset.  ("The root
node is not cycle master capable; selecting a new root node and resetting...",
often seen with iPods and other SBP-2 devices).  Rearrange the order of IRM
duties and node scanning.  TODO: Audit the ROM caching and parsing code for
underlying issues.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Jody McIntyre <scjody@steamballoon.com>
Cc: Ben Collins <bcollins@debian.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-30 12:41:19 -07:00
Olaf Hering
9b19d85acc [PATCH] provide MODALIAS= enviroment variable to autoload ieee1394 modules via udev
https://bugzilla.novell.com/show_bug.cgi?id=103746

Old 2.6.13 hotplug enviroment for 'plug in firewire disk' event:

==> debug.01139.ieee1394.add.8211 <==
set -- ieee1394
UDEV_LOG='7'
ACTION='add'
DEVPATH='/class/ieee1394/00010410100036e0-0'
SUBSYSTEM='ieee1394'
SEQNUM='1139'
PHYSDEVPATH='/devices/pci0001:10/0001:10:0d.0/0001:11:0a.0/fw-host0/00010410100036e0/00010410100036e0-0'
PHYSDEVBUS='ieee1394'
VENDOR_ID='000000'
MODEL_ID='001010'
GUID='00010410100036e0'
SPECIFIER_ID='00609e'
VERSION='010483'
UDEVD_EVENT='1'

Module spb2 is not loaded.

grep sbp2 /lib/modules/2.6.13-20050901172817-default/modules.alias
alias ieee1394:ven*mo*sp0000609Ever00010483* sbp2

printf 'ieee1394:ven%08Xmo%08Xsp%08Xver%08X\n' '0x000000' '0x001010' '0x00609e' '0x010483'
ieee1394:ven00000000mo00001010sp0000609Ever00010483

modprobe -v ieee1394:ven00000000mo00001010sp0000609Ever00010483
insmod /lib/modules/2.6.13-20050901172817-default/kernel/drivers/ieee1394/sbp2.ko

Providing a MODALIAS= enviroment variable with the content above will fix it.

Signed-off-by: Olaf Hering <olh@suse.de>
Cc: Ben Collins <bcollins@debian.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-07 16:57:41 -07:00
Ben Collins
1934b8b656 [PATCH] Sync up ieee-1394
Lots of this patch is trivial code cleanups (static vars were being
intialized to 0, etc).

There's also some fixes for ISO transmits (max buffer handling).
Aswell, we have a few fixes to disable IRM capabilites correctly.  We've
also disabled, by default some generally unused EXPORT symbols for the
sake of cleanliness in the kernel.  However, instead of removing them
completely, we felt it necessary to have a config option that allowed
them to be enabled for the many projects outside of the main kernel tree
that use our API for driver development.

The primary reason for this patch is to revert a MODE6->MODE10 RBC
conversion patch from the SCSI maintainers.  The new conversions handled
directly in the scsi layer do not seem to work for SBP2.  This patch
reverts to our old working code so that users can enjoy using Firewire
disks and dvd drives again.

We are working with the SCSI maintainers to resolve this issue outside
of the main kernel tree.  We'll merge the patch once the SCSI layer's
handling of the MODE10 conversion is working for us.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-10 12:23:23 -07:00
Christoph Lameter
3e1d1d28d9 [PATCH] Cleanup patch for process freezing
1. Establish a simple API for process freezing defined in linux/include/sched.h:

   frozen(process)		Check for frozen process
   freezing(process)		Check if a process is being frozen
   freeze(process)		Tell a process to freeze (go to refrigerator)
   thaw_process(process)	Restart process
   frozen_process(process)	Process is frozen now

2. Remove all references to PF_FREEZE and PF_FROZEN from all
   kernel sources except sched.h

3. Fix numerous locations where try_to_freeze is manually done by a driver

4. Remove the argument that is no longer necessary from two function calls.

5. Some whitespace cleanup

6. Clear potential race in refrigerator (provides an open window of PF_FREEZE
   cleared before setting PF_FROZEN, recalc_sigpending does not check
   PF_FROZEN).

This patch does not address the problem of freeze_processes() violating the rule
that a task may only modify its own flags by setting PF_FREEZE. This is not clean
in an SMP environment. freeze(process) is therefore not SMP safe!

Signed-off-by: Christoph Lameter <christoph@lameter.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-25 17:10:13 -07:00
Yani Ioannou
e404e274f6 [PATCH] Driver Core: drivers/i2c/chips/w83781d.c - drivers/s390/block/dcssblk.c: update device attribute callbacks
Signed-off-by: Yani Ioannou <yani.ioannou@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-20 15:15:34 -07:00
gregkh@suse.de
64360322ab [PATCH] Use device_for_each_child() to unregister devices in nodemgr_remove_host_dev()
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff -Nru a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c
2005-06-20 15:15:26 -07:00
Jody McIntyre
616b859fbd [PATCH] ieee1394: remove NULL checks for kfree
This patch removes redundant NULL pointer checks before kfree() in all of
drivers/ieee1394/

Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk>
Signed-off-by: Jody McIntyre <scjody@steamballoon.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-17 07:59:23 -07:00
Linus Torvalds
1da177e4c3 Linux-2.6.12-rc2
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!
2005-04-16 15:20:36 -07:00