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Tue, 16 Jun 2020 17:14:14 +0000 From: Niklas Cassel To: =?iso-8859-1?Q?Javier_Gonz=E1lez?= CC: Keith Busch , "linux-nvme@lists.infradead.org" , "linux-block@vger.kernel.org" , Damien Le Moal , Matias Bjorling , Christoph Hellwig , Sagi Grimberg , Jens Axboe Subject: Re: [PATCH 3/5] nvme: implement I/O Command Sets Command Set support Thread-Topic: [PATCH 3/5] nvme: implement I/O Command Sets Command Set support Thread-Index: AQHWQ22jQiOvuxhpcESNmwORkrTj76jbDDqAgABwB4A= Date: Tue, 16 Jun 2020 17:14:13 +0000 Message-ID: <20200616171413.GB507534@localhost.localdomain> References: <20200615233424.13458-1-keith.busch@wdc.com> <20200615233424.13458-4-keith.busch@wdc.com> <20200616103157.6q5ubyfjpnmee4hx@mpHalley.local> In-Reply-To: <20200616103157.6q5ubyfjpnmee4hx@mpHalley.local> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: javigon.com; dkim=none (message not signed) header.d=none;javigon.com; dmarc=none action=none header.from=wdc.com; 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x-ms-exchange-antispam-messagedata: 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 Content-Type: text/plain; charset="iso-8859-1" Content-ID: <6886509C04277545898DB0C37D7ED96F@namprd04.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0bf5379d-8993-4fd4-1765-08d81218b194 X-MS-Exchange-CrossTenant-originalarrivaltime: 16 Jun 2020 17:14:13.9293 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: ilzwcUvmlVuLlUtb7qhQOb21HF1xWPbH2lLX/BeCVTkGXrFzasAt/7BM4IIFEOUzYBhQueWiDGcesFGRutYIEg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR04MB4535 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On Tue, Jun 16, 2020 at 12:33:15PM +0200, Javier Gonz=E1lez wrote: > On 16.06.2020 08:34, Keith Busch wrote: > > From: Niklas Cassel > >=20 > > Implements support for the I/O Command Sets command set. The command se= t > > introduces a method to enumerate multiple command sets per namespace. I= f > > the command set is exposed, this method for enumeration will be used > > instead of the traditional method that uses the CC.CSS register command > > set register for command set identification. > >=20 > > For namespaces where the Command Set Identifier is not supported or > > recognized, the specific namespace will not be created. > >=20 > > Signed-off-by: Niklas Cassel > > --- (snip) > > diff --git a/include/linux/nvme.h b/include/linux/nvme.h > > index 5ce51ab4c50e..f8b5b8d7fc7e 100644 > > --- a/include/linux/nvme.h > > +++ b/include/linux/nvme.h > > @@ -134,6 +134,7 @@ enum { > > #define NVME_CAP_NSSRC(cap) (((cap) >> 36) & 0x1) > > #define NVME_CAP_MPSMIN(cap) (((cap) >> 48) & 0xf) > > #define NVME_CAP_MPSMAX(cap) (((cap) >> 52) & 0xf) > > +#define NVME_CAP_CSS(cap) (((cap) >> 37) & 0xff) >=20 > Small niptick: maybe move this under NVME_CAP_NSSRC to keep order? Makes sense. Kind regards, Niklas=