dmaengine: idxd: fix setting up priv mode for dwq

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DSA spec says WQ priv bit is 0 if the Privileged Mode Enable field of the
PCI Express PASID capability is 0 and pasid is enabled. Make sure that the
WQCFG priv field is set correctly according to usage type. Reject config if
setting up kernel WQ type and no support. Also add the correct priv setup
for a descriptor.

Fixes: 484f910e93 ("dmaengine: idxd: fix wq config registers offset programming")
Cc: Ramesh Thomas <ramesh.thomas@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162939084657.903168.14160019185148244596.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

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Dave Jiang 2021-08-19 09:34:06 -07:00 • committed by Vinod Koul

parent aac6c0f907

commit d8071323c5

4 changed files with 35 additions and 2 deletions

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include/uapi/linux/idxd.h

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