1. 16 Feb, 2012 2 commits
    • Grant Likely's avatar
      irq_domain/powerpc: constify irq_domain_ops · 9f70b8eb
      Grant Likely authored
      Make all the irq_domain_ops structures in powerpc 'static const'
      Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Milton Miller <miltonm@bga.com>
      Tested-by: default avatarOlof Johansson <olof@lixom.net>
    • Grant Likely's avatar
      irq_domain: Replace irq_alloc_host() with revmap-specific initializers · a8db8cf0
      Grant Likely authored
      Each revmap type has different arguments for setting up the revmap.
      This patch splits up the generator functions so that each revmap type
      can do its own setup and the user doesn't need to keep track of how
      each revmap type handles the arguments.
      This patch also adds a host_data argument to the generators.  There are
      cases where the host_data pointer will be needed before the function returns.
      ie. the legacy map calls the .map callback for each irq before returning.
      v2: - Add void *host_data argument to irq_domain_add_*() functions
          - fixed failure to compile
          - Moved IRQ_DOMAIN_MAP_* defines into irqdomain.c
      Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
      Cc: Rob Herring <rob.herring@calxeda.com>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Milton Miller <miltonm@bga.com>
      Tested-by: default avatarOlof Johansson <olof@lixom.net>
  2. 14 Feb, 2012 1 commit
    • Grant Likely's avatar
      irq_domain/powerpc: Use common irq_domain structure instead of irq_host · bae1d8f1
      Grant Likely authored
      This patch drops the powerpc-specific irq_host structures and uses the common
      irq_domain strucutres defined in linux/irqdomain.h.  It also fixes all
      the users to use the new structure names.
      Renaming irq_host to irq_domain has been discussed for a long time, and this
      patch is a step in the process of generalizing the powerpc virq code to be
      usable by all architecture.
      An astute reader will notice that this patch actually removes the irq_host
      structure instead of renaming it.  This is because the irq_domain structure
      already exists in include/linux/irqdomain.h and has the needed data members.
      Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Milton Miller <miltonm@bga.com>
      Tested-by: default avatarOlof Johansson <olof@lixom.net>
  3. 31 Oct, 2011 1 commit
  4. 19 May, 2011 1 commit
  5. 04 May, 2011 1 commit
  6. 29 Mar, 2011 1 commit
  7. 10 Mar, 2011 1 commit
  8. 28 Feb, 2011 1 commit
  9. 12 Oct, 2010 1 commit
  10. 24 Jul, 2010 1 commit
  11. 22 May, 2010 1 commit
    • Grant Likely's avatar
      of: Remove duplicate fields from of_platform_driver · 4018294b
      Grant Likely authored
      .name, .match_table and .owner are duplicated in both of_platform_driver
      and device_driver.  This patch is a removes the extra copies from struct
      of_platform_driver and converts all users to the device_driver members.
      This patch is a pretty mechanical change.  The usage model doesn't change
      and if any drivers have been missed, or if anything has been fixed up
      incorrectly, then it will fail with a compile time error, and the fixup
      will be trivial.  This patch looks big and scary because it touches so
      many files, but it should be pretty safe.
      Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
      Acked-by: default avatarSean MacLennan <smaclennan@pikatech.com>
  12. 18 May, 2010 1 commit
  13. 30 Mar, 2010 1 commit
    • Tejun Heo's avatar
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking... · 5a0e3ad6
      Tejun Heo authored
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
      percpu.h is included by sched.h and module.h and thus ends up being
      included when building most .c files.  percpu.h includes slab.h which
      in turn includes gfp.h making everything defined by the two files
      universally available and complicating inclusion dependencies.
      percpu.h -> slab.h dependency is about to be removed.  Prepare for
      this change by updating users of gfp and slab facilities include those
      headers directly instead of assuming availability.  As this conversion
      needs to touch large number of source files, the following script is
      used as the basis of conversion.
      The script does the followings.
      * Scan files for gfp and slab usages and update includes such that
        only the necessary includes are there.  ie. if only gfp is used,
        gfp.h, if slab is used, slab.h.
      * When the script inserts a new include, it looks at the include
        blocks and try to put the new include such that its order conforms
        to its surrounding.  It's put in the include block which contains
        core kernel includes, in the same order that the rest are ordered -
        alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
        doesn't seem to be any matching order.
      * If the script can't find a place to put a new include (mostly
        because the file doesn't have fitting include block), it prints out
        an error message indicating which .h file needs to be added to the
      The conversion was done in the following steps.
      1. The initial automatic conversion of all .c files updated slightly
         over 4000 files, deleting around 700 includes and adding ~480 gfp.h
         and ~3000 slab.h inclusions.  The script emitted errors for ~400
      2. Each error was manually checked.  Some didn't need the inclusion,
         some needed manual addition while adding it to implementation .h or
         embedding .c file was more appropriate for others.  This step added
         inclusions to around 150 files.
      3. The script was run again and the output was compared to the edits
         from #2 to make sure no file was left behind.
      4. Several build tests were done and a couple of problems were fixed.
         e.g. lib/decompress_*.c used malloc/free() wrappers around slab
         APIs requiring slab.h to be added manually.
      5. The script was run on all .h files but without automatically
         editing them as sprinkling gfp.h and slab.h inclusions around .h
         files could easily lead to inclusion dependency hell.  Most gfp.h
         inclusion directives were ignored as stuff from gfp.h was usually
         wildly available and often used in preprocessor macros.  Each
         slab.h inclusion directive was examined and added manually as
      6. percpu.h was updated not to include slab.h.
      7. Build test were done on the following configurations and failures
         were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
         distributed build env didn't work with gcov compiles) and a few
         more options had to be turned off depending on archs to make things
         build (like ipr on powerpc/64 which failed due to missing writeq).
         * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
         * powerpc and powerpc64 SMP allmodconfig
         * sparc and sparc64 SMP allmodconfig
         * ia64 SMP allmodconfig
         * s390 SMP allmodconfig
         * alpha SMP allmodconfig
         * um on x86_64 SMP allmodconfig
      8. percpu.h modifications were reverted so that it could be applied as
         a separate patch and serve as bisection point.
      Given the fact that I had only a couple of failures from tests on step
      6, I'm fairly confident about the coverage of this conversion patch.
      If there is a breakage, it's likely to be something in one of the arch
      headers which should be easily discoverable easily on most builds of
      the specific arch.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Guess-its-ok-by: default avatarChristoph Lameter <cl@linux-foundation.org>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
  14. 24 Nov, 2009 1 commit
  15. 14 Oct, 2009 1 commit
  16. 08 Jul, 2009 1 commit
  17. 15 Jun, 2009 1 commit
  18. 16 Dec, 2008 1 commit
    • Arnd Bergmann's avatar
      powerpc/cell/axon-msi: Fix MSI after kexec · 23e0e8af
      Arnd Bergmann authored
      Commit d015fe99
       'powerpc/cell/axon-msi: Retry on missing interrupt'
      has turned a rare failure to kexec on QS22 into a reproducible
      error, which we have now analysed.
      The problem is that after a kexec, the MSIC hardware still points
      into the middle of the old ring buffer.  We set up the ring buffer
      during reboot, but not the offset into it.  On older kernels, this
      would cause a storm of thousands of spurious interrupts after a
      kexec, which would most of the time get dropped silently.
      With the new code, we time out on each interrupt, waiting for
      it to become valid.  If more interrupts come in that we time
      out on, this goes on indefinitely, which eventually leads to
      a hard crash.
      The solution in this commit is to read the current offset from
      the MSIC when reinitializing it.  This now works correctly, as
      Reported-by: default avatarDirk Herrendoerfer <d.herrendoerfer@de.ibm.com>
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Acked-by: default avatarMichael Ellerman <michael@ellerman.id.au>
      Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
  19. 30 Nov, 2008 1 commit
    • Arnd Bergmann's avatar
      powerpc/cell/axon-msi: Retry on missing interrupt · d015fe99
      Arnd Bergmann authored
      The MSI capture logic for the axon bridge can sometimes
      lose interrupts in case of high DMA and interrupt load,
      when it signals an MSI interrupt to the MPIC interrupt
      controller while we are already handling another MSI.
      Each MSI vector gets written into a FIFO buffer in main
      memory using DMA, and that DMA access is normally flushed
      by the actual interrupt packet on the IOIF.  An MMIO
      register in the MSIC holds the position of the last
      entry in the FIFO buffer that was written.  However,
      reading that position does not flush the DMA, so that
      we can observe stale data in the buffer.
      In a stress test, we have observed the DMA to arrive
      up to 14 microseconds after reading the register.
      This patch works around this problem by retrying the
      access to the FIFO buffer.
      We can reliably detect the conditioning by writing
      an invalid MSI vector into the FIFO buffer after
      reading from it, assuming that all MSIs we get
      are valid.  After detecting an invalid MSI vector,
      we udelay(1) in the interrupt cascade for up to
      100 times before giving up.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
  20. 09 Jun, 2008 2 commits
  21. 23 May, 2008 1 commit
    • Michael Ellerman's avatar
      [POWERPC] Add debugging trigger to Axon MSI code · 72cac213
      Michael Ellerman authored
      This adds some debugging code to the Axon MSI driver.  It creates a
      file per MSIC in /sys/kernel/debug/powerpc, which allows the user to
      trigger a fake MSI interrupt by writing to the file.
      This can be used to test some of the MSI generation path.  In
      particular, that the MSIC recognises a write to the MSI address,
      generates an interrupt and writes the MSI packet into the ring buffer.
      All the code is inside #ifdef DEBUG so it causes no harm unless it's
      Signed-off-by: default avatarMichael Ellerman <michael@ellerman.id.au>
      Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
  22. 24 Apr, 2008 1 commit
  23. 06 Feb, 2008 3 commits
  24. 15 Oct, 2007 2 commits
    • Michael Ellerman's avatar
      Remove msic_dcr_read() in axon_msi.c · 2843e7f7
      Michael Ellerman authored
      msic_dcr_read() doesn't really do anything useful, just replace it with
      direct calls to dcr_read().
      Signed-off-by: default avatarMichael Ellerman <michael@ellerman.id.au>
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
    • Michael Ellerman's avatar
      Add dcr_host_t.base in dcr_read()/dcr_write() · 83f34df4
      Michael Ellerman authored
      Now that all users of dcr_read()/dcr_write() add the dcr_host_t.base, we
      can save them the trouble and do it in dcr_read()/dcr_write().
      As some background to why we just went through all this jiggery-pokery,
      benh sayeth:
       Initially the goal of the dcr_read/dcr_write routines was to operate like
       mfdcr/mtdcr which take absolute DCR numbers. The reason is that on 4xx
       hardware, indirect DCR access is a pain (goes through a table of
       instructions) and it's useful to have the compiler resolve an absolute DCR
       We decided that wasn't worth the API bastardisation since most places
       where absolute DCR values are used are low level 4xx-only code which may
       as well continue using mfdcr/mtdcr, while the new API is designed for
       device "instances" that can exist on 4xx and Axon type platforms and may
       be located at variable DCR offsets.
      Signed-off-by: default avatarMichael Ellerman <michael@ellerman.id.au>
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
  25. 03 Oct, 2007 1 commit
  26. 02 Oct, 2007 1 commit
  27. 13 Sep, 2007 2 commits
  28. 20 Jul, 2007 1 commit