dmaengine: idxd: Clean up descriptors with fault error

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Add code to "complete" a descriptor when the descriptor or its completion
address hit a fault error when SVA mode is being used. This error can be
triggered due to bad programming by the user. A lock is introduced in order
to protect the descriptor completion lists since the fault handler will run
from the system work queue after being scheduled in the interrupt handler.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/160382008092.3911367.12766483427643278985.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

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Dave Jiang 2020-10-27 10:34:40 -07:00 • committed by Vinod Koul

parent 8e50d39265

commit e4f4d8cdeb

3 changed files with 140 additions and 12 deletions

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5

drivers/dma/idxd/idxd.h

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1

drivers/dma/idxd/init.c

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146

drivers/dma/idxd/irq.c

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