On 4/28/23 13:55, Tom Zanussi wrote:
Create a lightweight callback interface to allow idxd sub-drivers to
be notified when work sent to idxd wqs has completed.
For a sub-driver to be notified of work completion, it needs to:
- Set the descriptor's 'Request Completion Interrupt'
(IDXD_OP_FLAG_RCI)
- Set the sub-driver desc_complete() callback when registering the
sub-driver e.g.:
struct idxd_device_driver my_drv = {
.probe = my_probe,
.desc_complete = my_complete,
}
- Set the sub-driver-specific context in the sub-driver's descriptor
e.g:
idxd_desc->crypto.req = req;
idxd_desc->crypto.tfm = tfm;
idxd_desc->crypto.src_addr = src_addr;
idxd_desc->crypto.dst_addr = dst_addr;
When the work completes and the completion irq fires, idxd will invoke
the desc_complete() callback with pointers to the descriptor, context,
and completion_type.
Signed-off-by: Dave Jiang <dave.jiang@xxxxxxxxx>
Signed-off-by: Tom Zanussi <tom.zanussi@xxxxxxxxxxxxxxx>
Reviewed-by: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Thanks.
-Fenghua
