scsi: hisi_sas: alloc queue id of slot according to device id

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Currently slots are allocated from queues in a round-robin fashion.
This causes a problem for internal commands in device mode. For this
mode, we should ensure that the internal abort command is the last
command seen in the host for that device. We can only ensure this when
we place the internal abort command after the preceding commands for
device that in the same queue, as there is no order in which the host
will select a queue to execute the next command.

This queue restriction makes supporting scsi mq more tricky in
the future, but should not be a blocker.

Note: Even though v1 hw does not support internal abort, the
      allocation method is chosen to be the same for consistency.

Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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Xiang Chen 2016-11-07 20:48:31 +08:00 • committed by Martin K. Petersen

parent d3b688d3c6

commit c70f1fb755

4 changed files with 30 additions and 41 deletions

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4

drivers/scsi/hisi_sas/hisi_sas.h

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8

drivers/scsi/hisi_sas/hisi_sas_main.c

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28

drivers/scsi/hisi_sas/hisi_sas_v1_hw.c

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29

drivers/scsi/hisi_sas/hisi_sas_v2_hw.c

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