kernel/git/stable/linux.git/Documentation/debugging-via-ohci1394.txt, branch master

docs: debugging-via-ohci1394.txt: add it to the core-api book

2020-05-15T17:59:17+00:00

There is an special chapter inside the core-api book about some debug infrastructure like tracepoints and debug objects. It sounded to me that this is the best place to add a chapter explaining how to use a FireWire controller to do remote kernel debugging, as explained on this document. Signed-off-by: Mauro Carvalho Chehab Link: https://lore.kernel.org/r/9b489d36d08ad89d3ad5aefef1f52a0715b29716.1588345503.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet

debugging-via-ohci1394.txt: standardize document format

2017-07-14T19:51:34+00:00

Each text file under Documentation follows a different format. Some doesn't even have titles! Change its representation to follow the adopted standard, using ReST markups for it to be parseable by Sphinx: - Mark and adjust titles; - Mark and indent literal blocks. Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Jonathan Corbet

docs: Fix a couple typos

2017-04-27T21:54:39+00:00

This commit gets rid of some minor errors in Documentation/: * cputopology.txt: drawes -> drawers * debugging-via-ohci1394.txt: remove an unnecessary line break * static-keys: statemnts -> statements * zorro.txt: busses -> buses Signed-off-by: Stan Drozd Signed-off-by: Jonathan Corbet

Doc: Change wikipedia's URL from http to https

2015-06-22T16:14:05+00:00

Recently wikipedia announced to secure access to the servers. Now all http access re-route to https. Signed-off-by: Masanari Iida Signed-off-by: Jonathan Corbet

firewire: revert to 4 GB RDMA, fix protocols using Memory Space

2014-05-29T13:50:30+00:00

Undo a feature introduced in v3.14 by commit fcd46b34425d "firewire: Enable remote DMA above 4 GB". That change raised the minimum address at which protocol drivers and user programs can register for request reception from 0x0001'0000'0000 to 0x8000'0000'0000. It turned out that at least one vendor-specific protocol exists which uses lower addresses: https://bugzilla.kernel.org/show_bug.cgi?id=76921 For the time being, revert most of commit fcd46b34425d so that affected protocols work like with kernel v3.13 and before. Just keep the valid documentation parts from the regressing commit, and the ability to identify controllers which could be programmed to accept >32 bit physical DMA addresses. The rest of fcd46b34425d should probably be brought back as an optional instead of default feature. Reported-by: Fabien Spindler Cc: # 3.14+ Signed-off-by: Stefan Richter

firewire: Enable remote DMA above 4 GB

2014-01-20T00:11:13+00:00

This makes all of a machine's memory accessible to remote debugging via FireWire, using the physical response unit (i.e. RDMA) of OHCI-1394 link layer controllers. This requires actual support by the controller. The only ones currently known to support it are Agere/LSI FW643. Most if not all other OHCI-1394 controllers do not implement the optional Physical Upper Bound register. With them, RDMA will continue to be limited to the lowermost 4 GB. firewire-ohci's startup message in the kernel log is augmented to tell whether the controller does expose more than 4 GB to RDMA. While OHCI-1394 allows for a maximum Physical Upper Bound of 0xffff'0000'0000 (near 256 TB), this implementation sets it to 0x8000'0000'0000 (128 TB) in order to avoid interference with applications that require interrupt-served asynchronous request reception at respectively low addresses. Note, this change does not switch remote DMA on. It only increases the range of remote access to all memory (instead of just 4 GB) whenever remote DMA was switched on by other means. The latter is achieved by setting firewire-ohci's remote_dma parameter, or if the physical DMA filter is opened through firewire-sbp2. Derived from patch "firewire: Enable physical DMA above 4GB" by Peter Hurley from March 27, 2013. Signed-off-by: Stefan Richter

firewire: ohci: Turn remote DMA support into a module parameter

2014-01-12T17:54:38+00:00

This makes it possible to debug kernel over FireWire without the need to recompile it. [Stefan R: changed description from "...0" to "...N"] Cc: Dave Hansen Signed-off-by: Lubomir Rintel Signed-off-by: Stefan Richter

Documentation/: update FireWire debugging documentation

2014-01-12T17:54:38+00:00

The old firewire stack is long dead now and a new version firescope has been released with support for current kernels. Signed-off-by: Lubomir Rintel Cc: Rob Landley Cc: Justin P. Mattock Cc: Bernhard Kaindl Signed-off-by: Andrew Morton Signed-off-by: Stefan Richter

ieee1394: update URLs in debugging-via-ohci1394.txt

2009-10-03T07:28:11+00:00

Update URLs of the userspace tools to use ohci1394_dma=early for debugging. Seems the address ftp://ftp.suse.de/private/bk/firewire/tools/* is not very helpful. After a quick search, seems this was talked about: http://www.mail-archive.com/kgdb-bugreport@lists.sourceforge.net/msg02761.html (can't find the original thread). Signed-off-by: Justin P. Mattock Signed-off-by: Stefan Richter

firewire: fw-ohci: add option for remote debugging

2008-04-18T15:55:33+00:00

This way firewire-ohci can be used for remote debugging like ohci1394. Version with amendment from Fri, 11 Apr 2008 00:08:08 +0200. Signed-off-by: Stefan Richter Acked-by: Bernhard Kaindl