1. 24 10月, 2008 1 次提交
    • F
      x86: use GFP_DMA for 24bit coherent_dma_mask · 75bebb7f
      FUJITA Tomonori 提交于
      dma_alloc_coherent (include/asm-x86/dma-mapping.h) avoids GFP_DMA
      allocation first and if the allocated address is not fit for the
      device's coherent_dma_mask, then dma_alloc_coherent does GFP_DMA
      allocation. This is because dma_alloc_coherent avoids precious GFP_DMA
      zone if possible. This is also how the old dma_alloc_coherent
      (arch/x86/kernel/pci-dma.c) works.
      
      However, if the coherent_dma_mask of a device is 24bit, there is no
      point to go into the above GFP_DMA retry mechanism. We had better use
      GFP_DMA in the first place.
      Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
      Tested-by: NTakashi Iwai <tiwai@suse.de>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      75bebb7f
  2. 23 10月, 2008 2 次提交
  3. 25 9月, 2008 1 次提交
  4. 10 9月, 2008 2 次提交
  5. 09 9月, 2008 1 次提交
  6. 08 9月, 2008 3 次提交
  7. 22 8月, 2008 2 次提交
  8. 27 7月, 2008 1 次提交
    • F
      dma-mapping: add the device argument to dma_mapping_error() · 8d8bb39b
      FUJITA Tomonori 提交于
      Add per-device dma_mapping_ops support for CONFIG_X86_64 as POWER
      architecture does:
      
      This enables us to cleanly fix the Calgary IOMMU issue that some devices
      are not behind the IOMMU (http://lkml.org/lkml/2008/5/8/423).
      
      I think that per-device dma_mapping_ops support would be also helpful for
      KVM people to support PCI passthrough but Andi thinks that this makes it
      difficult to support the PCI passthrough (see the above thread).  So I
      CC'ed this to KVM camp.  Comments are appreciated.
      
      A pointer to dma_mapping_ops to struct dev_archdata is added.  If the
      pointer is non NULL, DMA operations in asm/dma-mapping.h use it.  If it's
      NULL, the system-wide dma_ops pointer is used as before.
      
      If it's useful for KVM people, I plan to implement a mechanism to register
      a hook called when a new pci (or dma capable) device is created (it works
      with hot plugging).  It enables IOMMUs to set up an appropriate
      dma_mapping_ops per device.
      
      The major obstacle is that dma_mapping_error doesn't take a pointer to the
      device unlike other DMA operations.  So x86 can't have dma_mapping_ops per
      device.  Note all the POWER IOMMUs use the same dma_mapping_error function
      so this is not a problem for POWER but x86 IOMMUs use different
      dma_mapping_error functions.
      
      The first patch adds the device argument to dma_mapping_error.  The patch
      is trivial but large since it touches lots of drivers and dma-mapping.h in
      all the architecture.
      
      This patch:
      
      dma_mapping_error() doesn't take a pointer to the device unlike other DMA
      operations.  So we can't have dma_mapping_ops per device.
      
      Note that POWER already has dma_mapping_ops per device but all the POWER
      IOMMUs use the same dma_mapping_error function.  x86 IOMMUs use device
      argument.
      
      [akpm@linux-foundation.org: fix sge]
      [akpm@linux-foundation.org: fix svc_rdma]
      [akpm@linux-foundation.org: build fix]
      [akpm@linux-foundation.org: fix bnx2x]
      [akpm@linux-foundation.org: fix s2io]
      [akpm@linux-foundation.org: fix pasemi_mac]
      [akpm@linux-foundation.org: fix sdhci]
      [akpm@linux-foundation.org: build fix]
      [akpm@linux-foundation.org: fix sparc]
      [akpm@linux-foundation.org: fix ibmvscsi]
      Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
      Cc: Muli Ben-Yehuda <muli@il.ibm.com>
      Cc: Andi Kleen <andi@firstfloor.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Avi Kivity <avi@qumranet.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      8d8bb39b
  9. 23 7月, 2008 1 次提交
    • V
      x86: consolidate header guards · 77ef50a5
      Vegard Nossum 提交于
      This patch is the result of an automatic script that consolidates the
      format of all the headers in include/asm-x86/.
      
      The format:
      
      1. No leading underscore. Names with leading underscores are reserved.
      2. Pathname components are separated by two underscores. So we can
         distinguish between mm_types.h and mm/types.h.
      3. Everything except letters and numbers are turned into single
         underscores.
      Signed-off-by: NVegard Nossum <vegard.nossum@gmail.com>
      77ef50a5
  10. 22 7月, 2008 1 次提交
  11. 19 7月, 2008 1 次提交
  12. 30 6月, 2008 1 次提交
  13. 20 4月, 2008 23 次提交