Use the special LUNLEN_SINGLE_LEVEL constant for
post Rev A4 hardware for single byte luns. Without
this change, Rev B hardware would place the single
byte of lun data in byte 0 of the lun structure when
it should be in byte 1. Since there are few if any
devices on the market that support multiple luns in
target mode, the corrupted lun field (which was only
corrupted for non-zero luns) wasn't hurting us.
Approved by: re (rwatson)
aic79xx.h:
aic79xx.reg:
Return the SCB_TAG field to 16byte alignment.
It seems that on some PCI systems, SCBs are not
transferred correctly to the controller with
the previous placement of the SCB_TAG field.
Approved by: re (rwatson)
865. The APSIZE register has a variable-sized field of enabled bits.
To figure out how many bits a specific host bridge supports, write the
maximum width and see how many bits are set in the hardware. We then
use this mask for setting and getting the aperture size. Prior to this,
the agp(4) driver would treat an aperture size of 256 MB as 128 MB and
would not allocate enough physical memory for the GART as a result.
MFC after: 3 days
Sponsored by: The Weather Channel
Approved by: re (rwatson)
BUS_DMASYNC_ definitions remain as before. The does not change the ABI,
and reverts the API to be a bit more compatible and flexible. This has
survived a full 'make universe'.
Approved by: re (bmah)
aic79xx.c:
In ahd_handle_ign_wide_residue():
o Use SCB_XFERLEN_ODD SCB field to determine transfer
"oddness" rather than the DATA_COUNT_ODD logic.
SCB_XFERLEN_ODD is toggled on every ignore wide
residue message so that multiple ignore wide residue
messages for the same transaction are properly supported.
o If the sg list has been exausted, the sequencer
doesn't bother to update the residual data count
since it is known to be zero. Perform the zeroing
manually before calculating the remaining data count.
o Use multibyte in/out macros instead of shifting/masking
by hand.
aic79xx_inline.h:
In ahd_setup_scb_common(), setup the SCB_XFERLEN_ODD field.
aic79xx.reg:
Use the SCB_TASK_ATTRIBUTE field as a bit field in the
non-packetized case. We currently only define one bit,
SCB_XFERLEN_ODD.
Remove the ODD_SEG bit field that was used to carry the odd
transfer length information through the SG cache. This
is obviated by SCB_XFERLEN_ODD field.
Remove the DATA_COUNT_ODD scratch ram byte that was used
dynamicaly compute data transfer oddness. This is obviated
by SCB_XFERLEN_ODD field.
aic79xx.seq:
Remove all updates to the DATA_COUNT_ODD scratch ram field.
Remove all uses of ODD_SEG. These two save quite a few
sequencer instructions.
Use SCB_XFERLEN_ODD to validate the end of transfer
ignore wide residue message case.
aic7xxx.c:
In ahc_handle_ign_wide_residue():
o Use SCB_XFERLEN_ODD SCB field to determine transfer
"oddness" rather than the DATA_COUNT_ODD logic.
SCB_XFERLEN_ODD is toggled on every ignore wide
residue message so that multiple ignore wide residue
messages for the same transaction are properly supported.
o If the sg list has been exausted, the sequencer
doesn't bother to update the residual data count
since it is known to be zero. Perform the zeroing
manually before calculating the remaining data count.
o Ensure that SG_LIST_NULL is cleared in the
residual sg pointer for "mid-transfer" ignore
wide residue cases.
o Use multibyte in/out macros instead of shifting/masking
by hand.
aic7xxx.h:
Modify the SCB_GET_LUN() macro to mask the lun hardware
SCB field with LID. This leaves two bits in the LUN
field that can be used for other purposes.
aic7xxx.reg:
Change LID to be 0x3F. This is the maximum supported
lun size for non-packetized SCSI. Map the top bit
of the lun to SCB_XFERLEN_ODD. The host must set
this bit whenever a transfer is an odd length.
Remove the ODD_SEG bit field that was used to carry the odd
transfer length information through the SG cache. This
is obviated by SCB_XFERLEN_ODD field.
Remove the DATA_COUNT_ODD scratch ram byte that was used
dynamicaly compute data transfer oddness. This is obviated
by SCB_XFERLEN_ODD field.
aic7xxx.seq:
Be more careful in our handling of the SCB_LUN field. It
must be masked with LID if only lun information is desired.
Remove all updates to the DATA_COUNT_ODD scratch ram field.
Remove all uses of ODD_SEG. These two save quite a few
sequencer instructions.
Use SCB_XFERLEN_ODD to validate the end of transfer
ignore wide residue message case.
aic7xxx_inline.h:
In ahc_queue_scb(), setup the SCB_XFERLEN_ODD field.
Approved by: RE
FAILDIS in the SEQCTL register, not the HCNTRL register.
aic7xxx.c:
Remeber SEQCTL settings in the "seqctl" field of our
softc. seqctl defaults to just having FASTMODE set,
but the bus attachments can override this.
aic7xxx.h:
Add the seqctl softc field.
aic7xxx_pci.c:
Update the seqctl softc field and manually update SEQCTL
when to many PCI errors occur
Approved by: RE
to be more efficient by having the sequencer copy the
single byte of valid lun data into the long lun field.
aic79xx.c:
Memset our hardware SCB to 0 so that untouched
fields don't confuse diagnostic output. With the
old method for handling the Rev A bug, if the long
lun field was not 0, this could result in bogus
lun information being sent to drives.
Use the same SCB transfer size for all chip types
now that the long lun is not DMA'ed to the chip.
aic79xx.seq:
Add code to copy lun information for Rev.A hardware.
aic79xx_inline.h:
Remove host update of the long_lun field on every
packetized command.
Sort IDs based on chip type.
Remove IROC IDs. We'll switch to using the IROC masks
if/when we want to start attaching to IROC controllers.
Approved by: RE
