From: Jiri Pirko Date: Mon, 25 Apr 2022 03:44:23 +0000 (+0300) Subject: devlink: introduce line card device info infrastructure X-Git-Tag: v6.6.17~7459^2~263^2~8 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=28b2d1f1ac41dda0b239830765d85c7ae4434182;p=platform%2Fkernel%2Flinux-rpi.git devlink: introduce line card device info infrastructure Extend the line card info message with information (e.g., FW version) about devices found on the line card. Example: $ devlink lc info pci/0000:01:00.0 lc 8 pci/0000:01:00.0: lc 8 versions: fixed: hw.revision 0 running: ini.version 4 devices: device 0 versions: running: fw 19.2010.1310 device 1 versions: running: fw 19.2010.1310 device 2 versions: running: fw 19.2010.1310 device 3 versions: running: fw 19.2010.1310 Signed-off-by: Jiri Pirko Signed-off-by: Ido Schimmel Signed-off-by: David S. Miller --- diff --git a/Documentation/networking/devlink/devlink-linecard.rst b/Documentation/networking/devlink/devlink-linecard.rst index 5a8d598..a98b468 100644 --- a/Documentation/networking/devlink/devlink-linecard.rst +++ b/Documentation/networking/devlink/devlink-linecard.rst @@ -14,7 +14,7 @@ system. Following operations are provided: * Get a list of supported line card types. * Provision of a slot with specific line card type. * Get and monitor of line card state and its change. - * Get information about line card versions. + * Get information about line card versions and devices. Line card according to the type may contain one or more gearboxes to mux the lanes with certain speed to multiple ports with lanes diff --git a/include/net/devlink.h b/include/net/devlink.h index f96dcb3..0628959 100644 --- a/include/net/devlink.h +++ b/include/net/devlink.h @@ -151,6 +151,7 @@ struct devlink_port_new_attrs { }; struct devlink_info_req; +struct devlink_linecard_device; /** * struct devlink_linecard_ops - Linecard operations @@ -171,6 +172,7 @@ struct devlink_info_req; * @types_count: callback to get number of supported types * @types_get: callback to get next type in list * @info_get: callback to get linecard info + * @device_info_get: callback to get linecard device info */ struct devlink_linecard_ops { int (*provision)(struct devlink_linecard *linecard, void *priv, @@ -188,6 +190,9 @@ struct devlink_linecard_ops { int (*info_get)(struct devlink_linecard *linecard, void *priv, struct devlink_info_req *req, struct netlink_ext_ack *extack); + int (*device_info_get)(struct devlink_linecard_device *device, + void *priv, struct devlink_info_req *req, + struct netlink_ext_ack *extack); }; struct devlink_sb_pool_info { @@ -1583,10 +1588,9 @@ struct devlink_linecard * devlink_linecard_create(struct devlink *devlink, unsigned int linecard_index, const struct devlink_linecard_ops *ops, void *priv); void devlink_linecard_destroy(struct devlink_linecard *linecard); -struct devlink_linecard_device; struct devlink_linecard_device * devlink_linecard_device_create(struct devlink_linecard *linecard, - unsigned int device_index); + unsigned int device_index, void *priv); void devlink_linecard_device_destroy(struct devlink_linecard *linecard, struct devlink_linecard_device *linecard_device); diff --git a/net/core/devlink.c b/net/core/devlink.c index 5facd10..5f441a0 100644 --- a/net/core/devlink.c +++ b/net/core/devlink.c @@ -2062,6 +2062,7 @@ struct devlink_linecard_type { struct devlink_linecard_device { struct list_head list; unsigned int index; + void *priv; }; static int @@ -2429,6 +2430,68 @@ struct devlink_info_req { }; static int +devlink_nl_linecard_device_info_fill(struct sk_buff *msg, + struct devlink_linecard *linecard, + struct devlink_linecard_device *linecard_device, + struct netlink_ext_ack *extack) +{ + struct nlattr *attr; + + attr = nla_nest_start(msg, DEVLINK_ATTR_LINECARD_DEVICE); + if (!attr) + return -EMSGSIZE; + if (nla_put_u32(msg, DEVLINK_ATTR_LINECARD_DEVICE_INDEX, + linecard_device->index)) { + nla_nest_cancel(msg, attr); + return -EMSGSIZE; + } + if (linecard->ops->device_info_get) { + struct devlink_info_req req; + int err; + + req.msg = msg; + err = linecard->ops->device_info_get(linecard_device, + linecard_device->priv, + &req, extack); + if (err) { + nla_nest_cancel(msg, attr); + return err; + } + } + nla_nest_end(msg, attr); + + return 0; +} + +static int devlink_nl_linecard_devices_info_fill(struct sk_buff *msg, + struct devlink_linecard *linecard, + struct netlink_ext_ack *extack) +{ + struct devlink_linecard_device *linecard_device; + struct nlattr *attr; + int err; + + if (list_empty(&linecard->device_list)) + return 0; + + attr = nla_nest_start(msg, DEVLINK_ATTR_LINECARD_DEVICE_LIST); + if (!attr) + return -EMSGSIZE; + list_for_each_entry(linecard_device, &linecard->device_list, list) { + err = devlink_nl_linecard_device_info_fill(msg, linecard, + linecard_device, + extack); + if (err) { + nla_nest_cancel(msg, attr); + return err; + } + } + nla_nest_end(msg, attr); + + return 0; +} + +static int devlink_nl_linecard_info_fill(struct sk_buff *msg, struct devlink *devlink, struct devlink_linecard *linecard, enum devlink_command cmd, u32 portid, @@ -2453,6 +2516,10 @@ devlink_nl_linecard_info_fill(struct sk_buff *msg, struct devlink *devlink, if (err) goto nla_put_failure; + err = devlink_nl_linecard_devices_info_fill(msg, linecard, extack); + if (err) + goto nla_put_failure; + genlmsg_end(msg, hdr); return 0; @@ -10483,12 +10550,13 @@ EXPORT_SYMBOL_GPL(devlink_linecard_destroy); * * @linecard: devlink linecard * @device_index: index of the linecard device + * @priv: user priv pointer * * Return: Line card device structure or an ERR_PTR() encoded error code. */ struct devlink_linecard_device * devlink_linecard_device_create(struct devlink_linecard *linecard, - unsigned int device_index) + unsigned int device_index, void *priv) { struct devlink_linecard_device *linecard_device; @@ -10496,6 +10564,7 @@ devlink_linecard_device_create(struct devlink_linecard *linecard, if (!linecard_device) return ERR_PTR(-ENOMEM); linecard_device->index = device_index; + linecard_device->priv = priv; mutex_lock(&linecard->state_lock); list_add_tail(&linecard_device->list, &linecard->device_list); devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);