The following series implements a way for DMA drivers to report the result
of a transaction via callback in order to notify the upper layer. Thanks
Lars for providing guidance.
I added usage of the new mechanism in the ioatdma driver and also updated
the NTB code that uses this mechanism to receive the error. Jon, I assume
you'll let Vinod push the two NTB patches since it's part of the series.
Changes v3 -> v4:
* Addressed comments by Lars
- Added more verbose commit messages to all driver commits
- Moved cb to inside the function for get_callback_invoke()
- Moved change leak from 2/41 to 1/41
* Addressed comment by Sinan Kaya
- Changed code to use dmaengine_desc_get_callback_invoke()
* Addressed comments by Allen Hubbe
- Removed txd in NTB entry entirely
Changes v2 -> v3:
* Addressed comments by Lars
- Moved helper functions to drivers/dma/dmaengine.h
- Added helper function that does acquire and invoke callback
- Added helper function to detect callback valid
- Added comments to clearly define dmaengine_tx_result entries
* Fixed additional build errors from build bot
Changes v1 -> v2:
* Addressed comments by Vinod
- Changed dma_desc_callback to dmaengine_desc_callback
- Changed dma_trans_result to dmaengine_tx_result
* Fixed build issues for several of the drivers
* Addressed comments by Laurent
- Added documentation update
- Made result from dma_async_tx_callback_result a const
---
Dave Jiang (41):
dmaengine: Add helper function to prep for error reporting
dmaengine: at_hdmac: convert callback to helper function
dmaengine: at_xdmac: convert callback to helper function
dmaengine: coh901318: convert callback to helper function
dmaengine: cppi41: convert callback to helper function
dmaengine: dw: convert callback to helper function
dmaengine: ep93xx_dma: convert callback to helper function
dmaengine: fsl_raid: convert callback to helper function
dmaengine: fsldma: convert callback to helper function
dmaengine: imx-dma: convert callback to helper function
dmaengine: imx-sdma: convert callback to helper function
dmaengine: ioatdma: convert callback to helper function
dmaengine: iop-adma: convert callback to helper function
dmaengine: ipu: convert callback to helper function
dmaengine: mic_x100_dma: convert callback to helper function
dmaengine: mmp_pdma: convert callback to helper function
dmaengine: mmp_tdma: convert callback to helper function
dmaengine: mpc512x_dma: convert callback to helper function
dmaengine: mv_xor: convert callback to helper function
dmaengine: mxs-dma: convert callback to helper function
dmaengine: nbpfaxi: convert callback to helper function
dmaengine: pch_dma: convert callback to helper function
dmaengine: pl330: convert callback to helper function
dmaengine: ppc4xx_adma: convert callback to helper function
dmaengine: qcom_hidma: convert callback to helper function
dmaengine: sh_rcar-dmac: convert callback to helper function
dmaengine: sh_shdma-base: convert callback to helper function
dmaengine: sirf-dma: convert callback to helper function
dmaengine: ste_dma40: convert callback to helper function
dmaengine: tegra20-apb-dma: convert callback to helper function
dmaengine: timb_dma: convert callback to helper function
dmaengine: txx9dmac: convert callback to helper function
dmaengine: virt-dma: convert callback to helper function
dmaengine: xgene-dma: convert callback to helper function
dmaengine: xilinx_vdma: convert callback to helper function
dmaengine: add support to provide error result from a DMA transation
dmaengine: ioatdma: Add error handling to ioat driver
dmaengine: ioatdma: add error strings to chanerr output
ntb: add DMA error handling for TX DMA
ntb: add DMA error handling for RX DMA
dmaengine: documentation to the new callback mechanism
Documentation/dmaengine/provider.txt | 11 ++
drivers/dma/at_hdmac.c | 11 --
drivers/dma/at_xdmac.c | 8 +
drivers/dma/coh901318.c | 9 -
drivers/dma/cppi41.c | 2
drivers/dma/dmaengine.h | 84 +++++++++++++
drivers/dma/dw/core.c | 14 +-
drivers/dma/ep93xx_dma.c | 10 +-
drivers/dma/fsl_raid.c | 10 --
drivers/dma/fsldma.c | 6 -
drivers/dma/imx-dma.c | 4 -
drivers/dma/imx-sdma.c | 7 -
drivers/dma/ioat/dma.c | 213 ++++++++++++++++++++++++++++++----
drivers/dma/ioat/registers.h | 2
drivers/dma/iop-adma.c | 3
drivers/dma/ipu/ipu_idmac.c | 18 +--
drivers/dma/mic_x100_dma.c | 6 -
drivers/dma/mmp_pdma.c | 14 +-
drivers/dma/mmp_tdma.c | 4 -
drivers/dma/mpc512x_dma.c | 3
drivers/dma/mv_xor.c | 5 -
drivers/dma/mxs-dma.c | 3
drivers/dma/nbpfaxi.c | 9 -
drivers/dma/pch_dma.c | 7 -
drivers/dma/pl330.c | 10 +-
drivers/dma/ppc4xx/adma.c | 5 -
drivers/dma/qcom/hidma.c | 11 --
drivers/dma/sh/rcar-dmac.c | 16 +--
drivers/dma/sh/shdma-base.c | 13 +-
drivers/dma/sirf-dma.c | 7 -
drivers/dma/ste_dma40.c | 10 +-
drivers/dma/tegra20-apb-dma.c | 10 +-
drivers/dma/timb_dma.c | 9 -
drivers/dma/txx9dmac.c | 9 -
drivers/dma/virt-dma.c | 17 +--
drivers/dma/xgene-dma.c | 3
drivers/dma/xilinx/xilinx_vdma.c | 10 +-
drivers/ntb/ntb_transport.c | 193 ++++++++++++++++++++++++-------
include/linux/dmaengine.h | 16 +++
39 files changed, 552 insertions(+), 250 deletions(-)
--
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