scsi host is added after negotiating the max number of IOs with
Firmware.
Signed-off-by: NNarsimhulu Musini <nmusini@cisco.com>
Signed-off-by: NSesidhar Baddela <sebaddel@cisco.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Adding additional stats, and fixed logging messages.
- Added qdepth change stats
- Added separate isr stats for each type of interrupt
- Fixed race in updating active IOs
- Suppressed Link event message for DAS backend.
Signed-off-by: NNarsimhulu Musini <nmusini@cisco.com>
Signed-off-by: NSesidhar Baddela <sebaddel@cisco.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

This patch changes the !blk-mq path to the same defaults as the blk-mq
I/O path by always enabling block tagging, and always using host wide
tags.  We've had blk-mq available for a few releases so bugs with
this mode should have been ironed out, and this ensures we get better
coverage of over tagging setup over different configs.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Acked-by: NJens Axboe <axboe@kernel.dk>
Reviewed-by: NHannes Reinecke <hare@suse.de>
Signed-off-by: NJames Bottomley <JBottomley@Odin.com>

Cisco has developed a new PCI HBA interface called sNIC, which stands for
SCSI NIC. This is a new storage feature supported on specialized network
adapter. The new PCI function provides a uniform host interface and abstracts
backend storage.

[jejb: fix up checkpatch errors]
Signed-off-by: NNarsimhulu Musini <nmusini@cisco.com>
Signed-off-by: NSesidhar Baddela <sebaddel@cisco.com>
Reviewed-by: NHannes Reinecke <hare@suse.de>
Signed-off-by: NJames Bottomley <JBottomley@Odin.com>