drm/amdkfd: Preserve CP_MQD_IQ_RPTR internal state

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CP microcode uses undocumented bits in this register to record queue
state information. The KFD zeroes these bits in update_mqd, when invoked
through the UPDATE_QUEUE ioctl, causing incoherent state when the ioctl
is used to successively unmap and map a queue.

Since the queue type cannot be changed in this path, move the MQD write
to init_mqd.

Signed-off-by: Jay Cornwall <jay.cornwall@amd.com>
Reviewed-by: Ben Goz <ben.goz@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>

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Jay Cornwall 2015-01-19 11:47:34 -06:00 • committed by Oded Gabbay

parent b6819cec29

commit d752f95e55

1 changed files with 3 additions and 1 deletions

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4

drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c

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