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Tue, 13 Oct 2020 13:49:12 +0000 From: Vladimir Oltean To: netdev@vger.kernel.org Cc: alexandre.belloni@bootlin.com, andrew@lunn.ch, f.fainelli@gmail.com, vivien.didelot@gmail.com, alexandru.marginean@nxp.com, claudiu.manoil@nxp.com, xiaoliang.yang_1@nxp.com, hongbo.wang@nxp.com, kuba@kernel.org, jiri@resnulli.us, idosch@idosch.org, UNGLinuxDriver@microchip.com Subject: [RFC PATCH 03/10] net: dsa: add ops for devlink-sb Date: Tue, 13 Oct 2020 16:48:42 +0300 Message-Id: <20201013134849.395986-4-vladimir.oltean@nxp.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201013134849.395986-1-vladimir.oltean@nxp.com> References: <20201013134849.395986-1-vladimir.oltean@nxp.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [188.26.174.215] X-ClientProxiedBy: AM0PR01CA0084.eurprd01.prod.exchangelabs.com (2603:10a6:208:10e::25) To VI1PR04MB5696.eurprd04.prod.outlook.com (2603:10a6:803:e7::13) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (188.26.174.215) by AM0PR01CA0084.eurprd01.prod.exchangelabs.com (2603:10a6:208:10e::25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3477.20 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 86d6ea6a-a374-42ab-b036-08d86f7ec42e X-MS-Exchange-CrossTenant-AuthSource: VI1PR04MB5696.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Oct 2020 13:49:12.3660 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: TrLYIcM2gIF3zl2/QjvKjUnuSFB4wvhv3XcDzLazhmgMLLBen9c/1Cm9dPQNzvZA3jkGSjEBCguG1ta/AFkTVQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR04MB7104 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Switches that care about QoS might have hardware support for reserving buffer pools for individual ports or traffic classes, and configuring their sizes and thresholds. Through devlink-sb (shared buffers), this is all configurable, as well as their occupancy being viewable. Add the plumbing in DSA for these operations. Individual drivers still need to call devlink_sb_register() with the shared buffers they want to expose. A helper was not created in DSA for this purpose (unlike, say, dsa_devlink_params_register), since in my opinion it does not bring any benefit over plainly calling devlink_sb_register() directly. Signed-off-by: Vladimir Oltean --- include/net/dsa.h | 34 +++++++++ net/dsa/dsa2.c | 174 +++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 207 insertions(+), 1 deletion(-) diff --git a/include/net/dsa.h b/include/net/dsa.h index 35429a140dfa..7f2174535435 100644 --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -637,6 +637,40 @@ struct dsa_switch_ops { int (*devlink_info_get)(struct dsa_switch *ds, struct devlink_info_req *req, struct netlink_ext_ack *extack); + int (*devlink_sb_pool_get)(struct dsa_switch *ds, + unsigned int sb_index, u16 pool_index, + struct devlink_sb_pool_info *pool_info); + int (*devlink_sb_pool_set)(struct dsa_switch *ds, unsigned int sb_index, + u16 pool_index, u32 size, + enum devlink_sb_threshold_type threshold_type, + struct netlink_ext_ack *extack); + int (*devlink_sb_port_pool_get)(struct dsa_switch *ds, int port, + unsigned int sb_index, u16 pool_index, + u32 *p_threshold); + int (*devlink_sb_port_pool_set)(struct dsa_switch *ds, int port, + unsigned int sb_index, u16 pool_index, + u32 threshold, + struct netlink_ext_ack *extack); + int (*devlink_sb_tc_pool_bind_get)(struct dsa_switch *ds, int port, + unsigned int sb_index, u16 tc_index, + enum devlink_sb_pool_type pool_type, + u16 *p_pool_index, u32 *p_threshold); + int (*devlink_sb_tc_pool_bind_set)(struct dsa_switch *ds, int port, + unsigned int sb_index, u16 tc_index, + enum devlink_sb_pool_type pool_type, + u16 pool_index, u32 threshold, + struct netlink_ext_ack *extack); + int (*devlink_sb_occ_snapshot)(struct dsa_switch *ds, + unsigned int sb_index); + int (*devlink_sb_occ_max_clear)(struct dsa_switch *ds, + unsigned int sb_index); + int (*devlink_sb_occ_port_pool_get)(struct dsa_switch *ds, int port, + unsigned int sb_index, u16 pool_index, + u32 *p_cur, u32 *p_max); + int (*devlink_sb_occ_tc_port_bind_get)(struct dsa_switch *ds, int port, + unsigned int sb_index, u16 tc_index, + enum devlink_sb_pool_type pool_type, + u32 *p_cur, u32 *p_max); /* * MTU change functionality. Switches can also adjust their MRU through diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c index 183003e45762..61f2cfb96da4 100644 --- a/net/dsa/dsa2.c +++ b/net/dsa/dsa2.c @@ -400,8 +400,180 @@ static int dsa_devlink_info_get(struct devlink *dl, return -EOPNOTSUPP; } +static struct dsa_port *devlink_to_dsa_port(struct devlink_port *dlp) +{ + return container_of(dlp, struct dsa_port, devlink_port); +} + +static int dsa_devlink_sb_pool_get(struct devlink *dl, + unsigned int sb_index, u16 pool_index, + struct devlink_sb_pool_info *pool_info) +{ + struct dsa_devlink_priv *dl_priv = devlink_priv(dl); + struct dsa_switch *ds = dl_priv->ds; + + if (!ds->ops->devlink_sb_pool_get) + return -EOPNOTSUPP; + + return ds->ops->devlink_sb_pool_get(ds, sb_index, pool_index, + pool_info); +} + +static int dsa_devlink_sb_pool_set(struct devlink *dl, unsigned int sb_index, + u16 pool_index, u32 size, + enum devlink_sb_threshold_type threshold_type, + struct netlink_ext_ack *extack) +{ + struct dsa_devlink_priv *dl_priv = devlink_priv(dl); + struct dsa_switch *ds = dl_priv->ds; + + if (!ds->ops->devlink_sb_pool_set) + return -EOPNOTSUPP; + + return ds->ops->devlink_sb_pool_set(ds, sb_index, pool_index, size, + threshold_type, extack); +} + +static int dsa_devlink_sb_port_pool_get(struct devlink_port *dlp, + unsigned int sb_index, u16 pool_index, + u32 *p_threshold) +{ + struct dsa_devlink_priv *dl_priv = devlink_priv(dlp->devlink); + struct dsa_port *dp = devlink_to_dsa_port(dlp); + struct dsa_switch *ds = dl_priv->ds; + + if (!ds->ops->devlink_sb_port_pool_get) + return -EOPNOTSUPP; + + return ds->ops->devlink_sb_port_pool_get(ds, dp->index, sb_index, + pool_index, p_threshold); +} + +static int dsa_devlink_sb_port_pool_set(struct devlink_port *dlp, + unsigned int sb_index, u16 pool_index, + u32 threshold, + struct netlink_ext_ack *extack) +{ + struct dsa_devlink_priv *dl_priv = devlink_priv(dlp->devlink); + struct dsa_port *dp = devlink_to_dsa_port(dlp); + struct dsa_switch *ds = dl_priv->ds; + + if (!ds->ops->devlink_sb_port_pool_set) + return -EOPNOTSUPP; + + return ds->ops->devlink_sb_port_pool_set(ds, dp->index, sb_index, + pool_index, threshold, extack); +} + +static int +dsa_devlink_sb_tc_pool_bind_get(struct devlink_port *dlp, + unsigned int sb_index, u16 tc_index, + enum devlink_sb_pool_type pool_type, + u16 *p_pool_index, u32 *p_threshold) +{ + struct dsa_devlink_priv *dl_priv = devlink_priv(dlp->devlink); + struct dsa_port *dp = devlink_to_dsa_port(dlp); + struct dsa_switch *ds = dl_priv->ds; + + if (!ds->ops->devlink_sb_tc_pool_bind_get) + return -EOPNOTSUPP; + + return ds->ops->devlink_sb_tc_pool_bind_get(ds, dp->index, sb_index, + tc_index, pool_type, + p_pool_index, p_threshold); +} + +static int +dsa_devlink_sb_tc_pool_bind_set(struct devlink_port *dlp, + unsigned int sb_index, u16 tc_index, + enum devlink_sb_pool_type pool_type, + u16 pool_index, u32 threshold, + struct netlink_ext_ack *extack) +{ + struct dsa_devlink_priv *dl_priv = devlink_priv(dlp->devlink); + struct dsa_port *dp = devlink_to_dsa_port(dlp); + struct dsa_switch *ds = dl_priv->ds; + + if (!ds->ops->devlink_sb_tc_pool_bind_set) + return -EOPNOTSUPP; + + return ds->ops->devlink_sb_tc_pool_bind_set(ds, dp->index, sb_index, + tc_index, pool_type, + pool_index, threshold, + extack); +} + +static int dsa_devlink_sb_occ_snapshot(struct devlink *dl, + unsigned int sb_index) +{ + struct dsa_devlink_priv *dl_priv = devlink_priv(dl); + struct dsa_switch *ds = dl_priv->ds; + + if (!ds->ops->devlink_sb_occ_snapshot) + return -EOPNOTSUPP; + + return ds->ops->devlink_sb_occ_snapshot(ds, sb_index); +} + +static int dsa_devlink_sb_occ_max_clear(struct devlink *dl, + unsigned int sb_index) +{ + struct dsa_devlink_priv *dl_priv = devlink_priv(dl); + struct dsa_switch *ds = dl_priv->ds; + + if (!ds->ops->devlink_sb_occ_max_clear) + return -EOPNOTSUPP; + + return ds->ops->devlink_sb_occ_max_clear(ds, sb_index); +} + +static int dsa_devlink_sb_occ_port_pool_get(struct devlink_port *dlp, + unsigned int sb_index, + u16 pool_index, u32 *p_cur, + u32 *p_max) +{ + struct dsa_devlink_priv *dl_priv = devlink_priv(dlp->devlink); + struct dsa_port *dp = devlink_to_dsa_port(dlp); + struct dsa_switch *ds = dl_priv->ds; + + if (!ds->ops->devlink_sb_occ_port_pool_get) + return -EOPNOTSUPP; + + return ds->ops->devlink_sb_occ_port_pool_get(ds, dp->index, sb_index, + pool_index, p_cur, p_max); +} + +static int +dsa_devlink_sb_occ_tc_port_bind_get(struct devlink_port *dlp, + unsigned int sb_index, u16 tc_index, + enum devlink_sb_pool_type pool_type, + u32 *p_cur, u32 *p_max) +{ + struct dsa_devlink_priv *dl_priv = devlink_priv(dlp->devlink); + struct dsa_port *dp = devlink_to_dsa_port(dlp); + struct dsa_switch *ds = dl_priv->ds; + + if (!ds->ops->devlink_sb_occ_tc_port_bind_get) + return -EOPNOTSUPP; + + return ds->ops->devlink_sb_occ_tc_port_bind_get(ds, dp->index, + sb_index, tc_index, + pool_type, p_cur, + p_max); +} + static const struct devlink_ops dsa_devlink_ops = { - .info_get = dsa_devlink_info_get, + .info_get = dsa_devlink_info_get, + .sb_pool_get = dsa_devlink_sb_pool_get, + .sb_pool_set = dsa_devlink_sb_pool_set, + .sb_port_pool_get = dsa_devlink_sb_port_pool_get, + .sb_port_pool_set = dsa_devlink_sb_port_pool_set, + .sb_tc_pool_bind_get = dsa_devlink_sb_tc_pool_bind_get, + .sb_tc_pool_bind_set = dsa_devlink_sb_tc_pool_bind_set, + .sb_occ_snapshot = dsa_devlink_sb_occ_snapshot, + .sb_occ_max_clear = dsa_devlink_sb_occ_max_clear, + .sb_occ_port_pool_get = dsa_devlink_sb_occ_port_pool_get, + .sb_occ_tc_port_bind_get = dsa_devlink_sb_occ_tc_port_bind_get, }; static int dsa_switch_setup(struct dsa_switch *ds) -- 2.25.1