linux-toradex.git/drivers/scsi/aacraid/dpcsup.c, branch v4.13-rc5

scsi: aacraid: Update copyrights

2017-02-03T15:35:04+00:00

Added new copyright messages

Signed-off-by: Raghava Aditya Renukunta 
Signed-off-by: Dave Carroll 
Reviewed-by: Johannes Thumshirn 
Signed-off-by: Martin K. Petersen

scsi: aacraid: Include HBA direct interface

2017-02-03T15:35:03+00:00

Added support to send direct pasthru srb commands from management utilty
to the  controller.

Signed-off-by: Raghava Aditya Renukunta 
Signed-off-by: Dave Carroll 
Reviewed-by: Johannes Thumshirn 
Signed-off-by: Martin K. Petersen

scsi: aacraid: Added support for response path

2017-02-03T15:35:03+00:00

This patch enables the driver to actually process the I/O, or srb replies
from adapter. In addition to any HBA1000 or SmartIOC2000 adapter events.

Signed-off-by: Raghava Aditya Renukunta 
Signed-off-by: Dave Carroll 
Reviewed-by: Johannes Thumshirn 
Signed-off-by: Martin K. Petersen

aacraid: Remove code to needlessly complete fib

2016-04-29T23:08:24+00:00

Currently driver completes double completed or spurious interrupted fibs.
This  is not necessary and causes the SCSI mid layer to issue aborts and
resets, since completing a fib  prematurely might trigger a race condition
resulting in the driver not calling the scsi_done callback.

Fixed by removing the call to fib complete.

Signed-off-by: Raghava Aditya Renukunta 
Reviewed-by: Johannes Thumshirn 
Signed-off-by: Martin K. Petersen

aacraid: SCSI blk tag support

2016-02-24T02:27:02+00:00

The method to allocate and free FIB's in the present code utilizes
spinlocks. Multiple IO's have to wait on the spinlock to acquire or free
fibs creating a performance bottleneck.

An alternative solution would be to use block layer tags to keep track
of the fibs allocated and freed. To this end aac_fib_alloc_tag was
created to utilize the blk layer tags to plug into the Fib pool.These
functions are used exclusively in the IO path. 8 fibs are reserved for
the use of AIF management software and utilize the previous spinlock
based implementations.

Signed-off-by: Raghava Aditya Renukunta 
Reviewed-by: Shane Seymour 
Reviewed-by: Johannes Thumshirn 
Reviewed-by: Tomas Henzl 
Signed-off-by: Martin K. Petersen

aacraid: performance improvement changes

2015-04-09T23:55:21+00:00

Signed-off-by: Mahesh Rajashekhara 
Reviewed-by: Hannes Reinecke 
Reviewed-by: Murthy Bhat 
Signed-off-by: James Bottomley

aacraid: MSI-x support

2015-04-09T23:48:15+00:00

Signed-off-by: Mahesh Rajashekhara 
Reviewed-by: Hannes Reinecke 
Reviewed-by: Murthy Bhat 
Signed-off-by: James Bottomley

[SCSI] aacraid: Series 7 Async. (performance) mode support

2012-07-20T07:59:04+00:00

- Series 7 Async. (performance) mode support added
- New scatter/gather list format for Series 7
- Driver converts s/g list to a firmware suitable list for best performance on
  Series 7, this can be disabled with driver parameter "aac_convert_sgl" for
  testing purposes
- New container read/write command structure for Series 7
- Fast response support for the SCSI pass-through path added
- Async. status response buffer changes

Signed-off-by: Mahesh Rajashekhara 
Signed-off-by: James Bottomley

[SCSI] aacraid: Add new code for PMC-Sierra's SRC based controller family

2011-03-23T16:36:58+00:00

Added new hardware device 0x28b interface for PMC-Sierra's SRC based
controller family.

- new src.c file for 0x28b specific functions
- new XPORT header required
- sync. command interface: doorbell bits shifted (SRC_ODR_SHIFT, SRC_IDR_SHIFT)
- async. Interface: different inbound queue handling, no outbound I2O
  queue available, using doorbell ("PmDoorBellResponseSent") and
  response buffer on the host ("host_rrq") for status
- changed AIF (adapter initiated FIBs) interface: "DoorBellAifPending"
  bit to inform about pending AIF, "AifRequest" command to read AIF,
  "NoMoreAifDataAvailable" to mark the end of the AIFs

Signed-off-by: Mahesh Rajashekhara 
Signed-off-by: James Bottomley

[SCSI] aacraid: fix File System going into read-only mode

2010-01-17T18:16:17+00:00

These particular problems were reported by Cisco and SAP and customers
as well. Cisco reported on RHEL4 U6 and SAP reported on SLES9 SP4 and
SLES10 SP2. We added these fixes on RHEL4 U6 and gave a private build
to IBM and Cisco. Cisco and IBM tested it for more than 15 days and
they reported that they did not see the issue so far. Before the fix,
Cisco used to see the issue within 5 days. We generated a patch for
SLES9 SP4 and SLES10 SP2 and submitted to Novell. Novell applied the
patch and gave a test build to SAP. SAP tested and reported that the
build is working properly.

We also tested in our lab using the tools "dishogsync", which is IO
stress tool and the tool was provided by Cisco.

Issue1:  File System going into read-only mode

Root cause: The driver tends to not free the memory (FIB) when the
management request exits prematurely. The accumulation of such
un-freed memory causes the driver to fail to allocate anymore memory
(FIB) and hence return 0x70000 value to the upper layer, which puts
the file system into read only mode.

Fix details: The fix makes sure to free the memory (FIB) even if the
request exits prematurely hence ensuring the driver wouldn't run out
of memory (FIBs).


Issue2: False Raid Alert occurs

When the Physical Drives and Logical drives are reported as deleted or
added, even though there is no change done on the system

Root cause: Driver IOCTLs is signaled with EINTR while waiting on
response from the lower layers. Returning "EINTR" will never initiate
internal retry.

Fix details: The issue was fixed by replacing "EINTR" with
"ERESTARTSYS" for mid-layer retries.

Signed-off-by: Penchala Narasimha Reddy 
Signed-off-by: James Bottomley