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linux/drivers/scsi/libsas
Darrick J. Wong bdab4e8778 [SCSI] libsas: support NCQ for SATA disks
This patch adds SATAII NCQ support to libsas.  Both the use_ncq and the
dma_xfer flags in ata_task must be set for NCQ to work correctly on the
Adaptec SAS controller.  The rest of the patch adds ATA_FLAG_NCQ to
sata_port_info and sets up ap->scsi_host so that ata_setup_ncq doesn't
crash.  Please note that this patch is against the aic94xx-sas git tree,
not scsi-misc.  Thanks also to James Bottomley for providing an earlier
version of this patch from which to work.

I've tested this patch on a x206m with a ST380819AS SATA2 disk plugged
into the Adaptec SAS controller.  The drive came up with a queue depth
of 31, and I successfully ran an I/O flood test to coerce libata into
sending multiple commands simultaneously.  A kernel probe recorded the
maximum tag number that had been seen before and after the flood test;
before the test it was 2 and after it was 30, as I expected.

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-18 11:14:07 -05:00
..
Kconfig [SCSI] aic94xx: new driver 2006-08-29 09:52:29 -05:00
Makefile [SCSI] aic94xx: new driver 2006-08-29 09:52:29 -05:00
sas_discover.c [SCSI] Add SATA support to libsas 2007-07-18 11:12:53 -05:00
sas_dump.c [SCSI] aic94xx: new driver 2006-08-29 09:52:29 -05:00
sas_dump.h [SCSI] aic94xx: new driver 2006-08-29 09:52:29 -05:00
sas_event.c [SCSI] libsas: Add SAS_HA state flags to avoid queueing events while unloading 2007-01-13 16:21:53 -06:00
sas_expander.c [SCSI] libsas: fix up sas_smp_phy_control() 2007-07-18 11:13:50 -05:00
sas_init.c [SCSI] libsas: Add SAS_HA state flags to avoid queueing events while unloading 2007-01-13 16:21:53 -06:00
sas_internal.h [SCSI] libsas: Add SAS_HA state flags to avoid queueing events while unloading 2007-01-13 16:21:53 -06:00
sas_phy.c WorkStruct: make allyesconfig 2006-11-22 14:57:56 +00:00
sas_port.c [SCSI] libsas: Fix incorrect sas_port deformation in sas_form_port 2007-01-27 10:04:58 -06:00
sas_scsi_host.c [SCSI] libsas: support NCQ for SATA disks 2007-07-18 11:14:07 -05:00