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Miller" , Sasha Levin Subject: [PATCH AUTOSEL for 4.14 77/97] cxgb4vf: Fix SGE FL buffer initialization logic for 64K pages Thread-Topic: [PATCH AUTOSEL for 4.14 77/97] cxgb4vf: Fix SGE FL buffer initialization logic for 64K pages Thread-Index: AQHTv5rOfPqsXyXcuk+X7RBjKjIhCQ== Date: Mon, 19 Mar 2018 15:56:13 +0000 Message-ID: <20180319155411.12348-77-alexander.levin@microsoft.com> References: <20180319155411.12348-1-alexander.levin@microsoft.com> In-Reply-To: <20180319155411.12348-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;DM5PR2101MB1031;7:S4wve0jXwvP6gYhpqclnKWfVi2bwow3Rzes6d/00t2VC1gpDxy6pXa+3rr5NNYRDbDUIoQi60fpZkAAF96XD2+LQtAB36LwOf7GttDcMoN7/pVCFNxix4lzF9SAWvZtQeZAmt69xcV2rMr53VYHX+urADPSH7kNcTvgXIuV90XLrkHQPETlVEpcTfmlPA9md4XhBzC1S9MrTnCTxxs1HyiroY6VETOnpmt7rON+2QorGykfOryTxOvD/C49eAj1T;20:+BfuCPfqUY0FuaCto2ebfXMZwNusmjpxhHDY1ibN1BnBs7K2hAQ/xueOi+0IsoCMh/MNcUxTzU3oc7HNKAZKIT5oPIeHo2zsrZ3msqUdHZANGz4cZwKV85do3AUKpMiZ6bmhGqBSKwZgXM28EgZGdpRSedT5m1rKNat6pw8tkFU= x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 01a5f5d2-cbaf-4ef0-e4a9-08d58db20018 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(5600026)(4604075)(3008032)(4534165)(4627221)(201703031133081)(201702281549075)(2017052603328)(7193020);SRVR:DM5PR2101MB1031; x-ms-traffictypediagnostic: DM5PR2101MB1031: authentication-results: spf=none (sender IP is ) smtp.mailfrom=Alexander.Levin@microsoft.com; x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(28532068793085)(89211679590171); x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(8211001083)(61425038)(6040522)(2401047)(8121501046)(5005006)(93006095)(93001095)(10201501046)(3231221)(944501300)(52105095)(3002001)(6055026)(61426038)(61427038)(6041310)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(20161123564045)(20161123562045)(20161123558120)(20161123560045)(6072148)(201708071742011);SRVR:DM5PR2101MB1031;BCL:0;PCL:0;RULEID:;SRVR:DM5PR2101MB1031; x-forefront-prvs: 06167FAD59 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(376002)(366004)(346002)(396003)(39860400002)(39380400002)(199004)(189003)(25786009)(6506007)(59450400001)(66066001)(99286004)(76176011)(10290500003)(54906003)(68736007)(3660700001)(97736004)(22452003)(575784001)(107886003)(53936002)(86362001)(110136005)(2501003)(5250100002)(86612001)(14454004)(478600001)(72206003)(316002)(102836004)(26005)(186003)(6116002)(3846002)(7736002)(2950100002)(10090500001)(6436002)(3280700002)(6512007)(6666003)(2900100001)(8676002)(8936002)(36756003)(106356001)(105586002)(4326008)(5660300001)(305945005)(1076002)(81156014)(6486002)(81166006)(2906002)(22906009)(32563001)(217873001);DIR:OUT;SFP:1102;SCL:1;SRVR:DM5PR2101MB1031;H:DM5PR2101MB1032.namprd21.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; x-microsoft-antispam-message-info: C8En3NJukqTMGMy8wsuctQo1pdyxPv4OmqrkLGc+VLBk54cTyaVj68ec630biz/aOHie4nYslUKUCItmYq5xFtKyU7mDyUOI1974gUQILCegAPHVuvnT0D4/jH0H+yV7O1wAjVBJJoJeFpwV4ljXetp7BY8xX0Y1FN1I7pS7QGSYJq8DQl+fAytP+UqxVeaUCS0ErFY8coIT4U3A1q62Wqz3/9W2YfYNGkSKxH69QUSUssvDyFxID/zfkHG6EJudglnC6qEC+srzslix7IisFG3ptscmoZDIGP4sYcXK5MxqETqv9blluSCugSKoK6NRlnyYgyIbD2jreAB/AnILNw== spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 01a5f5d2-cbaf-4ef0-e4a9-08d58db20018 X-MS-Exchange-CrossTenant-originalarrivaltime: 19 Mar 2018 15:56:13.1040 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR2101MB1031 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Arjun Vynipadath [ Upstream commit ea0a42109aee7b92e631c4eb3f2219fadf58acdd ] We'd come in with SGE_FL_BUFFER_SIZE[0] and [1] both equal to 64KB and the extant logic would flag that as an error. This was already fixed in cxgb4 driver with "92ddcc7 cxgb4: Fix some small bugs in t4_sge_init_soft() when our Page Size is 64KB". Original Work by: Casey Leedom Signed-off-by: Arjun Vynipadath Signed-off-by: Ganesh Goudar Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/chelsio/cxgb4vf/sge.c | 23 +++++++++++++++++------ 1 file changed, 17 insertions(+), 6 deletions(-) diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/sge.c b/drivers/net/ether= net/chelsio/cxgb4vf/sge.c index 05498e7f2840..6246003f9922 100644 --- a/drivers/net/ethernet/chelsio/cxgb4vf/sge.c +++ b/drivers/net/ethernet/chelsio/cxgb4vf/sge.c @@ -2619,8 +2619,8 @@ void t4vf_sge_stop(struct adapter *adapter) int t4vf_sge_init(struct adapter *adapter) { struct sge_params *sge_params =3D &adapter->params.sge; - u32 fl0 =3D sge_params->sge_fl_buffer_size[0]; - u32 fl1 =3D sge_params->sge_fl_buffer_size[1]; + u32 fl_small_pg =3D sge_params->sge_fl_buffer_size[0]; + u32 fl_large_pg =3D sge_params->sge_fl_buffer_size[1]; struct sge *s =3D &adapter->sge; =20 /* @@ -2628,9 +2628,20 @@ int t4vf_sge_init(struct adapter *adapter) * the Physical Function Driver. Ideally we should be able to deal * with _any_ configuration. Practice is different ... */ - if (fl0 !=3D PAGE_SIZE || (fl1 !=3D 0 && fl1 <=3D fl0)) { + + /* We only bother using the Large Page logic if the Large Page Buffer + * is larger than our Page Size Buffer. + */ + if (fl_large_pg <=3D fl_small_pg) + fl_large_pg =3D 0; + + /* The Page Size Buffer must be exactly equal to our Page Size and the + * Large Page Size Buffer should be 0 (per above) or a power of 2. + */ + if (fl_small_pg !=3D PAGE_SIZE || + (fl_large_pg & (fl_large_pg - 1)) !=3D 0) { dev_err(adapter->pdev_dev, "bad SGE FL buffer sizes [%d, %d]\n", - fl0, fl1); + fl_small_pg, fl_large_pg); return -EINVAL; } if ((sge_params->sge_control & RXPKTCPLMODE_F) !=3D @@ -2642,8 +2653,8 @@ int t4vf_sge_init(struct adapter *adapter) /* * Now translate the adapter parameters into our internal forms. */ - if (fl1) - s->fl_pg_order =3D ilog2(fl1) - PAGE_SHIFT; + if (fl_large_pg) + s->fl_pg_order =3D ilog2(fl_large_pg) - PAGE_SHIFT; s->stat_len =3D ((sge_params->sge_control & EGRSTATUSPAGESIZE_F) ? 128 : 64); s->pktshift =3D PKTSHIFT_G(sge_params->sge_control); --=20 2.14.1