On Tue, 18 Oct 2022 19:15:56 +0800, John Garry wrote:
> Currently hisi_sas is the only libsas driver which uses the request tag
> for per-HW IO tag.
>
> All other libsas drivers manage the tags internally. Tag management in
> pm8001 and mvsas is currently using a simple bitmap, so use the request
> tag when available there. With this change we still need to manage tags
> for libsas "internal" commands, like SMP commands, and any other
> private commands so reserve some tags for this:
> - For pm8001 I went with pre-existing and unused PM8001_RESERVE_SLOT size.
> The value is 8, which should be enough. It is greater than mvsas, below,
> but this driver sends a lot of other private commands to HW.
> - For mvsas I went with 4, which still should be enough.
>
> [...]
Applied to 6.2/scsi-queue, thanks!
[1/7] scsi: libsas: Add sas_task_find_rq()
https://git.kernel.org/mkp/scsi/c/a9ee3f840646
[2/7] scsi: hisi_sas: Use sas_task_find_rq()
https://git.kernel.org/mkp/scsi/c/295fd2330a91
[3/7] scsi: hisi_sas: Put reserved tags in lower region of tagset
https://git.kernel.org/mkp/scsi/c/f7d190a94e35
[4/7] scsi: pm8001: Remove pm8001_tag_init()
https://git.kernel.org/mkp/scsi/c/1baa70d36403
[5/7] scsi: pm8001: Use sas_task_find_rq() for tagging
https://git.kernel.org/mkp/scsi/c/6472cfb418a0
[6/7] scsi: mvsas: Delete mvs_tag_init()
https://git.kernel.org/mkp/scsi/c/ffc9f9bf3f14
[7/7] scsi: mvsas: Use sas_task_find_rq() for tagging
https://git.kernel.org/mkp/scsi/c/2acf97f199f9
--
Martin K. Petersen Oracle Linux Engineering
