On Fri, May 25, 2018 at 6:19 AM, Wen He <wen.he_1@xxxxxxx> wrote: > NXP Queue DMA controller(qDMA) on Layerscape SoCs supports channel > virtuallization by allowing DMA jobs to be enqueued into different > command queues. > > Note that this module depends on NXP DPAA. > > Signed-off-by: Wen He <wen.he_1@xxxxxxx> > Signed-off-by: Jiaheng Fan <jiaheng.fan@xxxxxxx> > --- > change in v5: > - Fixed the issues includes: > * add error handler which every function > * replace word to bit definition > * move global variable to struct definition > * add some comments to context > > change in v4: > - Fixed the issues that Vinod point out in the mail list. > > change in v3: > - Add 'depends on ARM || ARM64' in file 'drivers/dma/Kconfig' > > change in v2: > - Replace GPL V2 License details by SPDX tags > - Replace Freescale by NXP > - Reduce and optimize header file references > - Replace big_endian by feature in struct fsl_qdma_engine > - Replace struct fsl_qdma_format by struct fsl_qdma_ccdf > and struct fsl_qdma_csgf > - Remove empty line > - Replace 'if..else' by macro 'FSL_QDMA_IN/OUT' in function > qdma_readl() and qdma_writel() > - Remove function fsl_qdma_alloc_chan_resources() > - Replace 'prei' by 'pre' > - Replace '-1' by '-ENOMEM' in function fsl_qdma_pre_request_enqueue_desc() > - Fix dma pool allocation need to rolled back in function > fsl_qdma_request_enqueue_desc() > - Replace function of_property_read_u32_array() by device_property_read_u32_array() > - Add functions fsl_qdma_cleanup_vchan() and fsl_qdma_irq_exit() to ensure > irq and tasklets stopped > - Replace dts node element 'channels' by 'dma-channels' > - Replace function platform_driver_register() by module_platform_driver() > > drivers/dma/Kconfig | 13 + > drivers/dma/Makefile | 1 + > drivers/dma/fsl-qdma.c | 1101 ++++++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 1115 insertions(+), 0 deletions(-) > create mode 100644 drivers/dma/fsl-qdma.c > > diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig > index 6d61cd0..99aff33 100644 > --- a/drivers/dma/Kconfig > +++ b/drivers/dma/Kconfig > @@ -225,6 +225,19 @@ config FSL_EDMA > multiplexing capability for DMA request sources(slot). > This module can be found on Freescale Vybrid and LS-1 SoCs. > > +config FSL_QDMA > + tristate "NXP Layerscape qDMA engine support" > + depends on ARM || ARM64 > + select DMA_ENGINE > + select DMA_VIRTUAL_CHANNELS > + select DMA_ENGINE_RAID > + select ASYNC_TX_ENABLE_CHANNEL_SWITCH > + help > + Support the NXP Layerscape qDMA engine with command queue and legacy mode. > + Channel virtualization is supported through enqueuing of DMA jobs to, > + or dequeuing DMA jobs from, different work queues. > + This module can be found on NXP Layerscape SoCs. > + > config FSL_RAID > tristate "Freescale RAID engine Support" > depends on FSL_SOC && !ASYNC_TX_ENABLE_CHANNEL_SWITCH > diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile > index 0f62a4d..93db0fc 100644 > --- a/drivers/dma/Makefile > +++ b/drivers/dma/Makefile > @@ -33,6 +33,7 @@ obj-$(CONFIG_DW_DMAC_CORE) += dw/ > obj-$(CONFIG_EP93XX_DMA) += ep93xx_dma.o > obj-$(CONFIG_FSL_DMA) += fsldma.o > obj-$(CONFIG_FSL_EDMA) += fsl-edma.o > +obj-$(CONFIG_FSL_QDMA) += fsl-qdma.o > obj-$(CONFIG_FSL_RAID) += fsl_raid.o > obj-$(CONFIG_HSU_DMA) += hsu/ > obj-$(CONFIG_IMG_MDC_DMA) += img-mdc-dma.o > diff --git a/drivers/dma/fsl-qdma.c b/drivers/dma/fsl-qdma.c > new file mode 100644 > index 0000000..81df812 > --- /dev/null > +++ b/drivers/dma/fsl-qdma.c > @@ -0,0 +1,1101 @@ Not a critical issue, but the format of the file header looks a little bit weird to me. Would you mind clean it up? > +// SPDX-License-Identifier: GPL-2.0 > +// Copyright 2018 NXP I know the SPDX tag is recommended to be the 1st line, but copyright normally goes below the file description not above. > + No newline needed. > +/* > + * Driver for NXP Layerscape Queue Direct Memory Access Controller > + * > + * Author: > + * Wen He <wen.he_1@xxxxxxx> > + * Jiaheng Fan <jiaheng.fan@xxxxxxx> > + * No newline needed. > + */ > + Regards, Leo -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
