John Garry 31eec8a6c0 hisi_sas: add hisi_sas_slave_configure() ... In high-datarate aging tests, it is found that the SCSI framework can periodically issue lu resets as some commands timeout. Response TASK SET FULL and SAS_QUEUE_FULL may be returned many times for the same command, causing the timeouts. The SAS_QUEUE_FULL errors come from TRANS_TX_CREDIT_TIMEOUT_ERR, TRANS_TX_CLOSE_NORMAL_ERR, and TRANS_TX_ERR_FRAME_TXED errors. They do not mean that the queue is full in the host, but rather it is equivalent to meaning the queue is full for the sdev. To overcome this, the queue depth for the sdev is reduced to 64 (from 256, set in sas_slave_configure()). Normally error code SAS_QUEUE_FULL will result in the sdev queue depth falling, but it falls too slowly during high-datarate tests and commands timeout before it has fallen to an adequete level from original value. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>		2016-02-29 21:00:03 -05:00
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hisi_sas_main.c	hisi_sas: add hisi_sas_slave_configure()	2016-02-29 21:00:03 -05:00
hisi_sas_v1_hw.c	hisi_sas: use slot abort in v1 hw	2016-02-29 21:00:03 -05:00
hisi_sas_v2_hw.c	hisi_sas: use slot abort in v2 hw	2016-02-29 21:00:03 -05:00
hisi_sas.h	hisi_sas: add hisi_sas_slot_abort()	2016-02-29 21:00:03 -05:00
Kconfig	hisi_sas: add dependency for HAS_IOMEM	2016-01-26 21:17:59 -05:00
Makefile	hisi_sas: add bare v2 hw driver	2016-02-23 21:27:02 -05:00