1. 11 Dec, 2007 37 commits
  2. 10 Dec, 2007 3 commits
    • Linus Torvalds's avatar
    • Linus Torvalds's avatar
      Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 · 437105f2
      Linus Torvalds authored
      * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
        [IA64] Fix iosapic interrupt delivery mode for CPE
        [IA64] kprobe: make kreturn probe handler stack unwind correct
        [IA64] operator priority fix in acpi_map_lsapic()
        [IA64] Add missing "space" to concatenated strings
        [IA64] make full use of macro efi_md_size
        [IA64] rename _bss to __bss_start
        [IA64] SGI Altix : fix bug in sn_io_late_init()
        [IA64] iosapic cleanup
        [IA64] signal : fix missing error checkings
        [IA64] export copy_page() to modules
        [IA64] don't assume that unwcheck.py is executable
        [IA64] increase .data.patch offset
      437105f2
    • Jarod Wilson's avatar
      firewire: OHCI 1.0 Isochronous Receive support · a186b4a6
      Jarod Wilson authored
      Third rendition of FireWire OHCI 1.0 Isochronous Receive support, using a
      zer-copy method similar to OHCI 1.1 which puts the IR data payload directly
      into the userspace buffer. The zero-copy implementation eliminates the
      video artifacts, audio popping, and buffer underrun problems seen with
      version 1 of this patch, as well as fixing a regression in OHCI 1.1 support
      introduced by version 2 of this patch.
      
      Successfully tested in OHCI 1.1 mode on the following chipsets:
      
      - NEC uPD72847 (rev 01), OHCI 1.1 (PCI)
      - Ti XIO2200(A) (rev 01), OHCI 1.1 (PCIe)
      - Ti TSB41AB2 (rev 01), OHCI 1.1 (PCI on SB Audigy)
      - Apple UniNorth 2 (rev 81), OHCI 1.1 (PowerBook G4 onboard)
      
      Successfully tested in OHCI 1.0 mode on the following chipsets:
      
      - Agere FW323 (rev 06), OHCI 1.0 (Mac Mini onboard)
      - Agere FW323 (rev 06), OHCI 1.0 (PCI)
      - Via VT6306 (rev 46), OHCI 1.0 (PCI)
      - NEC OrangeLink (rev 01), OHCI 1.0 (PCI)
      - NEC uPD72847 (rev 01), OHCI 1.1 (PCI)
      - Ti XIO2200(A) (rev 01), OHCI 1.1 (PCIe)
      
      The bulk of testing was done in an x86_64 system, but was also successfully
      sanity-tested on other systems, including a PPC(32) PowerBook G4 and an i686
      EPIA M10k. Crude benchmarking (watching top during capture) puts the cpu
      utilization during capture on the EPIA's 1GHz Via C3 processor around 13%,
      which is down from 30% with the v1 code.
      
      Some implementation details:
      
      To maintain the same userspace API as dual-buffer mode, we set up two
      descriptors for every incoming packet. The first is an INPUT_MORE descriptor,
      pointing to a buffer large enough to hold just the packet's iso headers,
      immediately followed by an INPUT_LAST descriptor, pointing to a chunk of the
      userspace buffer big enough for the packet's data payload. With this setup,
      each incoming packet fills in these two descriptors in a manner that very
      closely emulates dual-buffer receive, to the point where the bulk of the
      handle_ir_* code is now identical between the two (and probably primed for
      some restructuring to share code between them).
      
      The only caveat I have at the moment is that neither of my OHCI 1.0 Via
      VT6307-based FireWire controllers work particularly well with this code
      for reasons I have yet to figure out.
      Signed-off-by: default avatarJarod Wilson <jwilson@redhat.com>
      Signed-off-by: default avatarStefan Richter <stefanr@s5r6.in-berlin.de>
      a186b4a6