dmaengine: plx-dma: Implement hardware initialization and cleanup

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Allocate DMA coherent memory for the ring of DMA descriptors and
program the appropriate hardware registers.

A tasklet is created which is triggered on an interrupt to process
all the finished requests. Additionally, any remaining descriptors
are aborted when the hardware is removed or the resources freed.

Use an RCU pointer to synchronize PCI device unbind.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Link: https://lore.kernel.org/r/20200103212021.2881-3-logang@deltatee.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

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Logan Gunthorpe 2020-01-03 14:20:20 -07:00 • committed by Vinod Koul

parent 905ca51e63

commit c2dbcaa8c6

1 changed files with 370 additions and 0 deletions

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drivers/dma/plx_dma.c

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