linux-kernel - Re: [PATCH 0/6] Add support of the HBA mode on HP Smart Array P410i controllers

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Date:   Sat, 15 Dec 2018 01:30:06 +0500
From:   Ivan Mironov <mironov.ivan@...il.com>
To:     Don.Brace@...rochip.com, linux-scsi@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, don.brace@...rosemi.com,
        jejb@...ux.vnet.ibm.com, martin.petersen@...cle.com,
        esc.storagedev@...rosemi.com
Subject: Re: [PATCH 0/6] Add support of the HBA mode on HP Smart Array P410i
 controllers

On Fri, 2018-12-14 at 19:38 +0000, Don.Brace@...rochip.com wrote:
> NAKing this series.
> - The P410 controllers do not fully support HBA mode and we do not support adding it to the hpsa driver.
> 

Could you please elaborate on what exactly you mean by "do not fully
support HBA mode"?

HBA mode looks supported on P410i (at least to some degree) because:
*) There is an official method to enable/disable it on these
controllers. Only for itanium-based servers unfortunately.
*) This method is mentioned in various documents from HP regarding
Integrity servers.
*) Controller reacts on the change of corresponging bit in nvram_flags
by immediately removing any configured RAID arrays and by refusing to
configure new arrays. Which is totally expected for HBA mode.
*) HBA mode works for me on P410i with patched driver.