[SPDK] Re: About SPDK I/OAT Driver.

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Great, thanks for the clarification!

From: Harris, James R <james.r.harris(a)intel.com>
Date: Tuesday, October 25, 2022 at 7:01 AM
To: Storage Performance Development Kit <spdk(a)lists.01.org>
Subject: [SPDK] Re: About SPDK I/OAT Driver.
Those DCA related defines were pulled from much older versions of the IOAT =
driver, when DCA had to be enabled on a per-driver/device basis.

-Jim


From: Luse, Paul E <paul.e.luse(a)intel.com>
Date: Tuesday, October 25, 2022 at 6:57 AM
To: Storage Performance Development Kit <spdk(a)lists.01.org>
Subject: [SPDK] Re: About SPDK I/OAT Driver.
Good question, Jim I would have expected this line in ioat_channel_start()

ioat->regs->chanctrl =3D SPDK_IOAT_CHANCTRL_ANY_ERR_ABORT_EN;

to read:

ioat->regs->chanctrl =3D SPDK_IOAT_CHANCTRL_ANY_ERR_ABORT_EN | SPDK_IOAT_CH=
ANCTRL_COMPL_DCA_EN;

But I don=E2=80=99t have the spec in front of me to confirm whether this is=
 really required or not, just looking at the code and the defines =F0=9F=98=
=8A

thx
Paul


From: qiang su <qsu(a)petaio.com>
Date: Tuesday, October 25, 2022 at 5:56 AM
To: spdk(a)lists.01.org <spdk(a)lists.01.org>
Subject: [SPDK] Re: About SPDK I/OAT Driver.
Hi Jim,

Thanks for your reply.
Is the DCA enabled by default in SPDK I/OAT driver?
I haven't found any parameter or API to config DCA.
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