lkml.org 
[lkml]   [2008]   [Nov]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    Subject[PATCH 00/13] dmaengine redux
    Date
    The dmaengine subsystem collects and advertises dma channels for two classes
    of users in the kernel, memory-to-memory offload and traditional
    device-to-memory DMA. The original design was driven by the memory-to-memory
    case and is starting to show its limitations now that more device-to-memory
    DMA users are being planned. The primary difference between the two classes
    is that memory-to-memory offload is very amenable to channel sharing and is
    tolerant of dynamic channel changes. Compare this to the device-to-memory
    case where a channel must be dedicated to a device and may have
    platform-specific reasons why it cannot talk to a different device.

    This rework allows channels to be targeted to a public (mem-to-mem) pool or be
    reserved for an exclusive private (dev-to-mem) allocation. See [PATCH 1/13]
    for documentation of the changes. A nice side effect of the rework is:

    24 files changed, 679 insertions(+), 1108 deletions(-)

    All review welcomed, especially around the dma_slave changes, or performance
    impacts of dma_find_channel.

    These patches are currently on async_tx.git/upstream, and barring any
    brown-paper-bag issues will move to linux-next via async_tx.git/next.

    git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx.git upstream

    ---
    Dan Williams (13):
    dmaengine: kill enum dma_state_client
    dmaengine: remove 'bigref' infrastructure
    dmaengine: kill struct dma_client and supporting infrastructure
    dmaengine: replace dma_async_client_register with dmaengine_get
    atmel-mci: convert to dma_request_channel and down-level dma_slave
    dmatest: convert to dma_request_channel
    dmaengine: introduce dma_request_channel and private channels
    net_dma: convert to dma_find_channel
    dmaengine: provide a common 'issue_pending_all' implementation
    dmaengine: centralize channel allocation, introduce dma_find_channel
    dmaengine: up-level reference counting to the module level
    dmaengine: remove dependency on async_tx
    async_tx, dmaengine: document channel allocation and api rework

    Documentation/crypto/async-tx-api.txt | 135 +++----
    Documentation/dmaengine.txt | 1
    arch/avr32/include/asm/atmel-mci.h | 6
    arch/avr32/mach-at32ap/at32ap700x.c | 15 -
    crypto/async_tx/async_tx.c | 350 ------------------
    drivers/dma/Kconfig | 2
    drivers/dma/dmaengine.c | 637 +++++++++++++++++++++++----------
    drivers/dma/dmatest.c | 111 ++----
    drivers/dma/dw_dmac.c | 28 -
    drivers/dma/fsldma.c | 3
    drivers/dma/ioat_dma.c | 5
    drivers/dma/iop-adma.c | 11 -
    drivers/dma/mv_xor.c | 11 -
    drivers/mmc/host/atmel-mci.c | 103 +----
    include/linux/async_tx.h | 17 -
    include/linux/dmaengine.h | 148 ++------
    include/linux/dw_dmac.h | 31 +-
    include/linux/netdevice.h | 3
    include/net/netdma.h | 11 -
    net/core/dev.c | 148 --------
    net/ipv4/tcp.c | 5
    net/ipv4/tcp_input.c | 2
    net/ipv4/tcp_ipv4.c | 2
    net/ipv6/tcp_ipv6.c | 2
    24 files changed, 679 insertions(+), 1108 deletions(-)
    create mode 100644 Documentation/dmaengine.txt

    --

    Regards,
    Dan


    \
     
     \ /
      Last update: 2008-11-14 22:39    [W:0.024 / U:1.084 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site