Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Include parent_common.mk from up directory. Which may contain various
environment definitions such compiler, linker, etc. If such file is not
present it will not affect build.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

remove all *.ko.cmd and *.o.cmd files
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Mapping zio_block to a scatterlist is a common operations. This patch
simply adds a set of helpers to manage the scatter DMA mapping.
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
Acked-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

/dev/zio-sniff.ctrl is a misc device, selected by CONFIG_ZIO_SNIFF_DEV
which currently is on by default.  Every time a block is released,
a copy of the control is delivered to every reader of the device.

This is meant to be useful for monitoring, and to retrieve the
perfomance figures that will be added by later commits.  We need
a sniff device to monitor output channels, because even the application
driving I/O cannot recover the control structures that leave the
ZIO pipeline.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Federico Vaga <federico.vaga@gmail.com>

src point to the source code. Obj point to the object. Sometimes they
live toghether but users can decide to build the object outside the
source tree.
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
Acked-by: Alessandro Rubini <rubini@gnudd.com>

Because their are not part of the module building but simple user space
application. To avoid confusion, do not use kbuild environment style
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
Acked-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Acked-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Acked-by: Alessandro Rubini <rubini@gnudd.com>

For traceability purposes, we include commit descriptions
as MODULE_VERSION information in drivers that are deployed
in CERN control system.

Ideally, the commit description should be added to all the
binary blobs installed, but the kernel module is critical
in this connection, as it is crucial to trace back quickly
the whereabouts of installed .ko sources.
Signed-off-by: Juan David Gonzalez Cobas <dcobas@cern.ch>
Acked-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Federico Vaga <federico.vaga@gmail.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Federico Vaga <federico.vaga@gmail.com>

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Acked-by: Alessandro Rubini <rubini@gnudd.com>

We are getting rid of the "zio-" prefix in all file names.  The prefix
is needed module names (so all single-file devices triggers and
buffers) but not in component files. This simplifies stuff a little
for our command lines and tab completion.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Signed-off-by: Federico Vaga <federico.vaga@gmail.com>

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Acked-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Acked-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Acked-by: Alessandro Rubini <rubini@gnudd.com>

This is a library-like set of functions, but they are not in the kernel,
as far as I know, so let's offer them here. We will use them in the
vmalloc buffer, in place of the circular buffer we have now, and for
allocating minor device numbers.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Federico Vaga <federico.vaga@gmail.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Federico Vaga <federico.vaga@gmail.com>

Testing /dev/urandom versus zzero-0-1-data (the random device)
shows this increases performance by 0.1 usecs per block. We
are now just over 0.7 usecs per block on my development PC.

This also introduces zio-core.c with generic stuff. We agree that zio-sys
will become zio-sysfs over time.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Federico Vaga <federico.vaga@gmail.com>

Conflicts:

	Makefile

Now that the default trigger and default buffer are includes,
the module shoud be called zio.ko. zio-core.c will be the non-sysfs
stuff currently in zio-sys.c
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Federico Vaga <federico.vaga@gmail.com>

We introduced -DDEBUG in two makefiles by error. One error each of us.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Federico Vaga <federico.vaga@gmail.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Federico Vaga <federico.vaga@gmail.com>

This moves zio-dump to the tools directory.  The Makefiles are
suitable for out-of-kenrel compilation but not for in-kernel
compilation, at this point.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Federico Vaga <federico.vaga@gmail.com>

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Acked-by: Alessandro Rubini <rubini@gnudd.com>

The flags were incorrectly passed to make, now they are not.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Federico Vaga <federico.vaga@gmail.com>

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Acked-by: Alessandro Rubini <rubini@gnudd.com>

From this commit onwards the whole thing compiles and works (from
2.6.34 onwards). We chose to save you from the past history of
internal zio development.

Signed-off by: Federico Vaga <federico.vaga@gmail.com>
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>