Messages in this thread | | | Subject | [git pull] async_tx/dmaengine update for 2.6.29 (part 1) | From | Dan Williams <> | Date | Wed, 07 Jan 2009 12:19:09 -0700 |
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Hi Linus, please pull from:
git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx.git next
...to receive:
Dan Williams (22): async_tx, dmaengine: document channel allocation and api rework dmaengine: remove dependency on async_tx dmaengine: up-level reference counting to the module level dmaengine: centralize channel allocation, introduce dma_find_channel dmaengine: provide a common 'issue_pending_all' implementation net_dma: convert to dma_find_channel dmaengine: introduce dma_request_channel and private channels dmatest: convert to dma_request_channel atmel-mci: convert to dma_request_channel and down-level dma_slave dmaengine: replace dma_async_client_register with dmaengine_get dmaengine: kill struct dma_client and supporting infrastructure dmaengine: remove 'bigref' infrastructure dmaengine: kill enum dma_state_client iop-adma: let devm do its job, don't duplicate free iop-adma: kill debug BUG_ON iop-adma: enable module removal ioat: do not perform removal actions at shutdown dmaengine: add a release for dma class devices and dependent infrastructure dmaengine: use idr for registering dma device numbers dmaengine: advertise all channels on a device to dma_filter_fn dmaengine: bump initcall level to arch_initcall ioat: fix self test for multi-channel case
Documentation/crypto/async-tx-api.txt | 96 ++--- 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/dca/dca-core.c | 2 +- drivers/dma/Kconfig | 2 - drivers/dma/dmaengine.c | 778 ++++++++++++++++++++++++--------- drivers/dma/dmatest.c | 129 ++---- drivers/dma/dw_dmac.c | 119 +++--- drivers/dma/fsldma.c | 5 +- drivers/dma/ioat.c | 92 ++--- drivers/dma/ioat_dma.c | 18 +- drivers/dma/iop-adma.c | 30 +-- drivers/dma/mv_xor.c | 11 +- drivers/mmc/host/atmel-mci.c | 103 ++---- include/linux/async_tx.h | 17 +- include/linux/dmaengine.h | 181 +++------ include/linux/dw_dmac.h | 31 +- include/linux/netdevice.h | 3 - include/net/netdma.h | 11 - net/core/dev.c | 149 +------ net/ipv4/tcp.c | 5 +- net/ipv4/tcp_input.c | 2 +- net/ipv4/tcp_ipv4.c | 2 +- net/ipv6/tcp_ipv6.c | 2 +- 26 files changed, 900 insertions(+), 1260 deletions(-) create mode 100644 Documentation/dmaengine.txt
1) Channel allocation rework 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 appearing. 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.
2) Fixes for dmaengine Stephen Hemminger pointed out that the dmaengine sysfs implementation was broken. It now has a proper ->release() routine.
3) Fixes for ioat The previous channel allocation scheme covered a shutdown bug.
4) Fixes for iop-adma Some devm fixups, and module removal enablement.
These commits have been in linux-next, although I bit the bullet and rebased recently to cover a git-bisect breakage case. This was caused by net-next-2.6.git moving a routine that was deleted by this branch. Thanks to Stephen Rothwell for pointing this out.
There is at least 1 pending driver that depends on this code, it may come in a "part 2" pull request once some final comments are resolved.
Thanks! Dan
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