dmaengine: dw-axi-dmac: simplify descriptor management

Browse source

Simplify and refactor the descriptor management by removing the redundant
Linked List Item (LLI) queue control logic from the AxiDMA driver.
The descriptor is split into virtual descriptor and hardware LLI so that
only hardware LLI memories are allocated from the DMA memory pool.

Up to 64 descriptors can be allocated within a PAGE_SIZE compare to 16
descriptors in previous version. This solves the problem where an
ALSA driver expects more than 16 DMA descriptors to run.

Signed-off-by: Sia Jee Heng <jee.heng.sia@intel.com>
Tested-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Link: https://lore.kernel.org/r/20210125013255.25799-3-jee.heng.sia@intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

...

This commit is contained in:

Sia Jee Heng 2021-01-25 09:32:40 +08:00 • committed by Vinod Koul

parent 8c70fb7e0a

commit ef6fb2d6f1

2 changed files with 102 additions and 71 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

164

drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c

View file

9

drivers/dma/dw-axi-dmac/dw-axi-dmac.h

View file