Dear Aditya,
Am 17.02.2017 um 20:29 schrieb Raghava Aditya Renukunta:
Using a PMC Adaptec HBA 1000-8e with latest Linux, it only initializes
in sync mode, instead of async mode.
The patches that enable async mode in HBA 1000-8e, have been included in the James Bottomley's linux-scsi Branch and are on track be
Included into Linux 4.11.
https://git.kernel.org/cgit/linux/kernel/git/jejb/scsi.git/
```
$ git describe --tag
v4.10-rc8-47-g0722f57bf
$ dmesg
[ 21.359635] Adaptec aacraid driver 1.2-1[41066]-ms
[ 21.360017] aacraid 0000:04:00.0: can't disable ASPM; OS doesn't have
ASPM control
[ 21.363987] AAC0: Async. mode not supported by current driver, sync.
mode enforced.
[ 21.363987] Please update driver to get full performance.
[ 21.364949] AAC0: kernel 1.2-0[0] Nov 5 2015
[ 21.365275] AAC0: monitor 0.0-0[0]
[ 21.371382] AAC0: bios 0.13-209[32000]
[ 21.371711] AAC0: serial 10F447
[ 21.372035] AAC0: Non-DASD support enabled.
[ 21.372360] AAC0: 64bit support enabled.
[ 21.372688] AAC0: 64 Bit DAC enabled
[…]
$ git grep 'AAC_DRIVER_BUILD 41066'
drivers/scsi/aacraid/aacraid.h:# define AAC_DRIVER_BUILD 41066
```
Searching the vendor Web site, there is *Linux Driver Source
1.2.1-53005* available for download [1].
The latest upstream driver version is 50740. We will be reaching version 53005 in couple of patch sets ( ~ 3).
http://git.kernel.org/cgit/linux/kernel/git/jejb/scsi.git/commit/?id=96f6a6134766de0d42a98c7758736dde16e0add5
Thank you for the details. At our infrastructure we only want to use LTS
Linux kernels, and the latest in 4.14. So right now, Linux 4.14.6
includes version 50834 [1], which is the same version currently in Linus
master branch (4.15-rc3). Is that save to use with async mode, or are
you aware of problems and we should always use the latest out of tree
driver, which is at version 55022 and can be download from the Microsemi
server [3].
How does the upstream process work? Is there a git repository somewhere
from Microsemi? Are the patches already up for review? (I didn’t find them.)
We try to push out patch sets to kernel.org for every major driver release we make. Usually they go into the
sub component maintainers branch (linux-scsi ) , which is then pushed out to Linus when the merge
window for opens (currently the merge window for 4.10 is closed , barring fixes). So Linux version 4.11 should have
full async support and more for HBA1000-8e.
We do not maintain a git repository unfortunately, but we do release the source code for every release as you
indicated.
For further reference the patches are sent out in the scsi mailing list linux-scsi@xxxxxxxxxxxxxxx ,
the archive is here http://marc.info/?l=linux-scsi&r=1&w=2 .
Hope I cleared up your doubts. Please do reach out if you have other concerns or questions.
Yes, thank you for your elaborate answer, which cleared up a lot of my
doubts. We would be even more satisfied if you moved your development
fully to the Linux kernel tree, so that it always carries the latest
driver. If we can help with that by contacting certain people, please
tell us.
Kind regards,
Paul
[1] https://storage.microsemi.com/en-us/speed/raid/aac/linux/aacraid-linux-src-1_2_1-53005_tgz.php
[2]
https://elixir.free-electrons.com/linux/v4.14.6/source/drivers/scsi/aacraid/aacraid.h#L100
[3]
https://storage.microsemi.com/en-us/downloads/linux_source/linux_source_code/productid=aha-1000-8e&dn=microsemi+adaptec+hba+1000-8e.php
