Add PDMA driver support for SiFive HiFive Unleashed RevA00 board. Mainly follows
DMAengine controller doc[1] to implement and take other DMA drivers as reference.
Such as
- drivers/dma/fsl-edma.c
- drivers/dma/dw-edma/
- drivers/dma/pxa-dma.c
Using DMA test client[2] to test. Detailed datasheet is doc[3]. Driver supports:
- 4 physical DMA channels, share same DONE and error interrupt handler.
- Support MEM_TO_MEM
- Tested by DMA test client
- patches include DT Bindgins document and dts for fu450-c000 SoC. Separate dts
patch for easier review and apply to different branch or SoC platform.
- retry 1 time if DMA error occurs.
[Changelog]
- v6 patch
. Remove incorrect reviewer and fix commit number
. Revise sf_pdma_desc_residue() to report residue according to cookie. The tx
could be in completed, in-progress state or still in pending list.
. Refer to fsl-edma.c to free irq and kill tasklet before exit.
. Minor fixes include left-justisfied, empty line and unnecessary line.
[Reference Doc]
[1] ./Documentation/driver-api/dmaengine/provider.rst
[2] ./Documentation/driver-api/dmaengine/dmatest.rst
[3] https://static.dev.sifive.com/FU540-C000-v1.0.pdf
[Simple steps to test of DMA Test client]
$ echo 1 > /sys/module/dmatest/parameters/iterations
$ echo dma0chan0 > /sys/module/dmatest/parameters/channel
$ echo dma0chan1 > /sys/module/dmatest/parameters/channel
$ echo dma0chan2 > /sys/module/dmatest/parameters/channel
$ echo dma0chan3 > /sys/module/dmatest/parameters/channel
$ echo 1 > /sys/module/dmatest/parameters/run
[Expected test result]
[ 267.563323] dmatest: dma0chan0-copy0: summary 45629 tests, 0 failures 38769.01 iops 309661 KB/s (0)
[ 267.572427] dmatest: dma0chan1-copy0: summary 45863 tests, 0 failures 40286.85 iops 321643 KB/s (0)
[ 267.581392] dmatest: dma0chan2-copy0: summary 45975 tests, 0 failures 41178.48 iops 328740 KB/s (0)
[ 267.590542] dmatest: dma0chan3-copy0: summary 44768 tests, 0 failures 38560.29 iops 307726 KB/s (0)
Green Wan (4):
dt-bindings: dmaengine: sf-pdma: add bindins for SiFive PDMA
riscv: dts: add support for PDMA device of HiFive Unleashed Rev A00
dmaengine: sf-pdma: add platform DMA support for HiFive Unleashed A00
MAINTAINERS: Add Green as SiFive PDMA driver maintainer
.../bindings/dma/sifive,fu540-c000-pdma.yaml | 55 ++
MAINTAINERS | 6 +
arch/riscv/boot/dts/sifive/fu540-c000.dtsi | 7 +
drivers/dma/Kconfig | 2 +
drivers/dma/Makefile | 1 +
drivers/dma/sf-pdma/Kconfig | 6 +
drivers/dma/sf-pdma/Makefile | 1 +
drivers/dma/sf-pdma/sf-pdma.c | 621 ++++++++++++++++++
drivers/dma/sf-pdma/sf-pdma.h | 122 ++++
9 files changed, 821 insertions(+)
create mode 100644 Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml
create mode 100644 drivers/dma/sf-pdma/Kconfig
create mode 100644 drivers/dma/sf-pdma/Makefile
create mode 100644 drivers/dma/sf-pdma/sf-pdma.c
create mode 100644 drivers/dma/sf-pdma/sf-pdma.h
base-commit: 4dd58158254c8a027f2bf5060b72ef64cafa3b9d
--
2.17.1
