diff options
| author | Radu Alexe <radu.alexe@nxp.com> | 2017-10-03 11:48:17 (GMT) |
|---|---|---|
| committer | Xie Xiaobo <xiaobo.xie@nxp.com> | 2017-10-05 12:52:01 (GMT) |
| commit | 30d4e3e63437fe50abff8e19f8351840e3e7ac6f (patch) | |
| tree | 74e8d36cf86a7de3c54121ff9b26eb56338cfaea /drivers/dma/Kconfig | |
| parent | c567a000518c1e85d0e4812b8477e84d61cd5a30 (diff) | |
| download | linux-30d4e3e63437fe50abff8e19f8351840e3e7ac6f.tar.xz | |
dma: caam: add dma driver using scatter-gather
This module introduces a SG DMA driver based on the DMA capabilities of
the CAAM hardware block. CAAM DMA is a platform driver that is only
probed if the device is defined in the device tree. The driver creates
a DMA channel for each JR of the CAAM. This introduces a dependency on
the JR driver. Therefore a defering mechanism was used to ensure that
the CAAM DMA driver is probed only after the JR driver.
Signed-off-by: Radu Alexe <radu.alexe@nxp.com>
Signed-off-by: Tudor Ambarus <tudor-dan.ambarus@nxp.com>
Signed-off-by: Rajiv Vishwakarma <rajiv.vishwakarma@nxp.com>
Diffstat (limited to 'drivers/dma/Kconfig')
| -rw-r--r-- | drivers/dma/Kconfig | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig index e5b0fb0..8caaf09 100644 --- a/drivers/dma/Kconfig +++ b/drivers/dma/Kconfig @@ -578,6 +578,23 @@ config ZX_DMA help Support the DMA engine for ZTE ZX296702 platform devices. +config CRYPTO_DEV_FSL_CAAM_DMA + tristate "CAAM DMA engine support" + depends on CRYPTO_DEV_FSL_CAAM_JR + default y + select DMA_ENGINE + select ASYNC_CORE + select ASYNC_TX_ENABLE_CHANNEL_SWITCH + help + Selecting this will offload the DMA operations for users of + the scatter gather memcopy API to the CAAM via job rings. The + CAAM is a hardware module that provides hardware acceleration to + cryptographic operations. It has a built-in DMA controller that can + be programmed to read/write cryptographic data. This module defines + a DMA driver that uses the DMA capabilities of the CAAM. + + To compile this as a module, choose M here: the module + will be called caam_dma. # driver files source "drivers/dma/bestcomm/Kconfig" |