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  1. 19 Apr, 2008 1 commit
    • Ben Nizette's avatar
      UIO: Implement a UIO interface for the SMX Cryptengine · b54f2863
      Ben Nizette authored 
      This patch implements a UIO interface for the SMX Cryptengine.

The Cryptengine found on the Nias Digital SMX board is best suited
for a UIO interface.  It is not wired in to the cryptographic API
as the engine handles it's own keys, algorithms, everything.  All
that we know about is that if there's room in the buffer, you can
write data to it and when there's data ready, you read it out again.

There isn't necessarily even any direct correlation between data
going in and data coming out again, the engine may consume or
generate data all on its own.

This driver is for proprietary hardware but we're always told to
submit the drivers anyway; here you are.  :-)

This is version 4 of this patch and addresses all issues raised by
Hans-Jürgen Koch and Paul Mundt in their reviews.  Slightly altered
is Paul's suggestion to use DRV_NAME and DRV_VERSION as the UIO
version and name.  While at the moment they are the same, there
is no reason for them to stay that way.  Nevertheless we now at
least provide a MODULE_VERSION macro to keep modinfo happy.
Signed-off-by: default avatarBen Nizette <bn@niasdigital.com>
Acked-by: default avatarPaul Mundt <lethal@linux-sh.org>
Signed-off-by: default avatarHans J Koch <hjk@linutronix.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      b54f2863
  3. 18 Apr, 2008 1 commit
  5. 17 Apr, 2008 1 commit
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  47. 09 Feb, 2008 1 commit
  49. 08 Feb, 2008 4 commits
    • Haavard Skinnemoen's avatar
      MAINTAINERS: add Haavard as maintainer of the atmel_serial driver · a1cfac48
      Haavard Skinnemoen authored 
      The following patchset cleans up the atmel_serial driver a bit, moves a
significant portion of the interrupt handler into a tasklet, and adds DMA
support.  This is the result of a combined effort by Chip Coldwell, Remy
Bohmer and me.  The patches should apply cleanly onto Linus' latest git tree,
and I've also tested it on -mm (with a couple of avr32 fixes applied to make
the rest of the tree compile.)

With DMA, I see transfer rates around 92 kbps when transferring a big file
using ZModem (both directions are roughly the same.) I've also tested the same
thing with a bunch of debug options enabled.  The transfer rate is slightly
lower, but no errors are reported.

Note that break and error handling doesn't work too well with DMA enabled.
This is a common problem with all the efforts I've seen adding DMA support to
this driver (including my own).  The PDC error handling also accesses icount
without locking.  I'm tempted to just ignore the problem for now and hopefully
come up with a solution later.

This patch:

The atmel_serial driver never had a MAINTAINERS entry, although Andrew Victor
has effectively been acting as a maintainer since he got the driver merged
into mainline in the first place.

I'll keep Cc'ing Andrew on all patches, but I'm going to take the main
responsibility for getting things moving upstream from now on.
Signed-off-by: default avatarHaavard Skinnemoen <hskinnemoen@atmel.com>
Acked-by: default avatarAndrew Victor <linux@maxim.org.za>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      a1cfac48
    • Jan Kara's avatar
      udf: change maintainer · 800fdfb9
      Jan Kara authored 
      I've tried to contact Ben Fennema a few times but without success.  Since I'm
currently probably closest to being an UDF maintainer, I guess it's fine to
also change the entry in MAINTAINERS.
Signed-off-by: default avatarJan Kara <jack@suse.cz>
Cc: <bfennema@falcon.csc.calpoly.edu>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      800fdfb9
    • Nick Piggin's avatar
      rewrite rd · 9db5579b
      Nick Piggin authored 
      This is a rewrite of the ramdisk block device driver.

The old one is really difficult because it effectively implements a block
device which serves data out of its own buffer cache.  It relies on the dirty
bit being set, to pin its backing store in cache, however there are non
trivial paths which can clear the dirty bit (eg.  try_to_free_buffers()),
which had recently lead to data corruption.  And in general it is completely
wrong for a block device driver to do this.

The new one is more like a regular block device driver.  It has no idea about
vm/vfs stuff.  It's backing store is similar to the buffer cache (a simple
radix-tree of pages), but it doesn't know anything about page cache (the pages
in the radix tree are not pagecache pages).

There is one slight downside -- direct block device access and filesystem
metadata access goes through an extra copy and gets stored in RAM twice.
However, this downside is only slight, because the real buffercache of the
device is now reclaimable (because we're not playing crazy games with it), so
under memory intensive situations, footprint should effectively be the same --
maybe even a slight advantage to the new driver because it can also reclaim
buffer heads.

The fact that it now goes through all the regular vm/fs paths makes it
much more useful for testing, too.

   text    data     bss     dec     hex filename
   2837     849     384    4070     fe6 drivers/block/rd.o
   3528     371      12    3911     f47 drivers/block/brd.o

Text is larger, but data and bss are smaller, making total size smaller.

A few other nice things about it:
- Similar structure and layout to the new loop device handlinag.
- Dynamic ramdisk creation.
- Runtime flexible buffer head size (because it is no longer part of the
  ramdisk code).
- Boot / load time flexible ramdisk size, which could easily be extended
  to a per-ramdisk runtime changeable size (eg. with an ioctl).
- Can use highmem for the backing store.

[akpm@linux-foundation.org: fix build]
[byron.bbradley@gmail.com: make rd_size non-static]
Signed-off-by: default avatarNick Piggin <npiggin@suse.de>
Signed-off-by: default avatarByron Bradley <byron.bbradley@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      9db5579b
    • David Howells's avatar
      mn10300: add the MN10300/AM33 architecture to the kernel · b920de1b
      David Howells authored 
      Add architecture support for the MN10300/AM33 CPUs produced by MEI to the
kernel.

This patch also adds board support for the ASB2303 with the ASB2308 daughter
board, and the ASB2305.  The only processor supported is the MN103E010, which
is an AM33v2 core plus on-chip devices.

[akpm@linux-foundation.org: nuke cvs control strings]
Signed-off-by: default avatarMasakazu Urade <urade.masakazu@jp.panasonic.com>
Signed-off-by: default avatarKoichi Yasutake <yasutake.koichi@jp.panasonic.com>
Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      b920de1b